1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/dsa/mv88e6131.c b/drivers/net/dsa/mv88e6131.c
index dadfafba64e..953bc6a49e5 100644
--- a/drivers/net/dsa/mv88e6131.c
+++ b/drivers/net/dsa/mv88e6131.c
@@ -155,7 +155,7 @@ static int mv88e6131_setup_global(struct dsa_switch *ds)
 
 static int mv88e6131_setup_port(struct dsa_switch *ds, int p)
 {
-	struct mv88e6xxx_priv_state *ps = (void *)(ds + 1);
+	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
 	int addr = REG_PORT(p);
 	u16 val;
 
@@ -274,7 +274,7 @@ static int mv88e6131_setup_port(struct dsa_switch *ds, int p)
 
 static int mv88e6131_setup(struct dsa_switch *ds)
 {
-	struct mv88e6xxx_priv_state *ps = (void *)(ds + 1);
+	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
 	int i;
 	int ret;
 
diff --git a/fs/9p/Kconfig b/fs/9p/Kconfig
index 74e0723e90b..6489e1fc1af 100644
--- a/fs/9p/Kconfig
+++ b/fs/9p/Kconfig
@@ -1,6 +1,6 @@
 config 9P_FS
-	tristate "Plan 9 Resource Sharing Support (9P2000) (Experimental)"
-	depends on INET && NET_9P && EXPERIMENTAL
+	tristate "Plan 9 Resource Sharing Support (9P2000)"
+	depends on INET && NET_9P
 	help
 	  If you say Y here, you will get experimental support for
 	  Plan 9 resource sharing via the 9P2000 protocol.
@@ -8,3 +8,39 @@ config 9P_FS
 	  See <http://v9fs.sf.net> for more information.
 
 	  If unsure, say N.
+
+if 9P_FS
+config 9P_FSCACHE
+	bool "Enable 9P client caching support"
+	depends on 9P_FS=m && FSCACHE || 9P_FS=y && FSCACHE=y
+	help
+	  Choose Y here to enable persistent, read-only local
+	  caching support for 9p clients using FS-Cache
+
+
+config 9P_FS_POSIX_ACL
+	bool "9P POSIX Access Control Lists"
+	select FS_POSIX_ACL
+	help
+	  POSIX Access Control Lists (ACLs) support permissions for users and
+	  groups beyond the owner/group/world scheme.
+
+	  To learn more about Access Control Lists, visit the POSIX ACLs for
+	  Linux website <http://acl.bestbits.at/>.
+
+	  If you don't know what Access Control Lists are, say N
+
+endif
+
+
+config 9P_FS_SECURITY
+        bool "9P Security Labels"
+        depends on 9P_FS
+        help
+          Security labels support alternative access control models
+          implemented by security modules like SELinux.  This option
+          enables an extended attribute handler for file security
+          labels in the 9P filesystem.
+
+          If you are not using a security module that requires using
+          extended attributes for file security labels, say N.
diff --git a/fs/9p/Makefile b/fs/9p/Makefile
index bc7f0d1551e..ff7be98f84f 100644
--- a/fs/9p/Makefile
+++ b/fs/9p/Makefile
@@ -3,10 +3,17 @@ obj-$(CONFIG_9P_FS) := 9p.o
 9p-objs := \
 	vfs_super.o \
 	vfs_inode.o \
+	vfs_inode_dotl.o \
 	vfs_addr.o \
 	vfs_file.o \
 	vfs_dir.o \
 	vfs_dentry.o \
 	v9fs.o \
-	fid.o \
+	fid.o  \
+	xattr.o \
+	xattr_user.o \
+	xattr_trusted.o
 
+9p-$(CONFIG_9P_FSCACHE) += cache.o
+9p-$(CONFIG_9P_FS_POSIX_ACL) += acl.o
+9p-$(CONFIG_9P_FS_SECURITY) += xattr_security.o
diff --git a/fs/9p/acl.c b/fs/9p/acl.c
new file mode 100644
index 00000000000..8482f2d1160
--- /dev/null
+++ b/fs/9p/acl.c
@@ -0,0 +1,381 @@
+/*
+ * Copyright IBM Corporation, 2010
+ * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2.1 of the GNU Lesser General Public License
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <net/9p/9p.h>
+#include <net/9p/client.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <linux/posix_acl_xattr.h>
+#include "xattr.h"
+#include "acl.h"
+#include "v9fs.h"
+#include "v9fs_vfs.h"
+#include "fid.h"
+
+static struct posix_acl *__v9fs_get_acl(struct p9_fid *fid, char *name)
+{
+	ssize_t size;
+	void *value = NULL;
+	struct posix_acl *acl = NULL;
+
+	size = v9fs_fid_xattr_get(fid, name, NULL, 0);
+	if (size > 0) {
+		value = kzalloc(size, GFP_NOFS);
+		if (!value)
+			return ERR_PTR(-ENOMEM);
+		size = v9fs_fid_xattr_get(fid, name, value, size);
+		if (size > 0) {
+			acl = posix_acl_from_xattr(&init_user_ns, value, size);
+			if (IS_ERR(acl))
+				goto err_out;
+		}
+	} else if (size == -ENODATA || size == 0 ||
+		   size == -ENOSYS || size == -EOPNOTSUPP) {
+		acl = NULL;
+	} else
+		acl = ERR_PTR(-EIO);
+
+err_out:
+	kfree(value);
+	return acl;
+}
+
+int v9fs_get_acl(struct inode *inode, struct p9_fid *fid)
+{
+	int retval = 0;
+	struct posix_acl *pacl, *dacl;
+	struct v9fs_session_info *v9ses;
+
+	v9ses = v9fs_inode2v9ses(inode);
+	if (((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) ||
+			((v9ses->flags & V9FS_ACL_MASK) != V9FS_POSIX_ACL)) {
+		set_cached_acl(inode, ACL_TYPE_DEFAULT, NULL);
+		set_cached_acl(inode, ACL_TYPE_ACCESS, NULL);
+		return 0;
+	}
+	/* get the default/access acl values and cache them */
+	dacl = __v9fs_get_acl(fid, POSIX_ACL_XATTR_DEFAULT);
+	pacl = __v9fs_get_acl(fid, POSIX_ACL_XATTR_ACCESS);
+
+	if (!IS_ERR(dacl) && !IS_ERR(pacl)) {
+		set_cached_acl(inode, ACL_TYPE_DEFAULT, dacl);
+		set_cached_acl(inode, ACL_TYPE_ACCESS, pacl);
+	} else
+		retval = -EIO;
+
+	if (!IS_ERR(dacl))
+		posix_acl_release(dacl);
+
+	if (!IS_ERR(pacl))
+		posix_acl_release(pacl);
+
+	return retval;
+}
+
+static struct posix_acl *v9fs_get_cached_acl(struct inode *inode, int type)
+{
+	struct posix_acl *acl;
+	/*
+	 * 9p Always cache the acl value when
+	 * instantiating the inode (v9fs_inode_from_fid)
+	 */
+	acl = get_cached_acl(inode, type);
+	BUG_ON(acl == ACL_NOT_CACHED);
+	return acl;
+}
+
+struct posix_acl *v9fs_iop_get_acl(struct inode *inode, int type)
+{
+	struct v9fs_session_info *v9ses;
+
+	v9ses = v9fs_inode2v9ses(inode);
+	if (((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) ||
+			((v9ses->flags & V9FS_ACL_MASK) != V9FS_POSIX_ACL)) {
+		/*
+		 * On access = client  and acl = on mode get the acl
+		 * values from the server
+		 */
+		return NULL;
+	}
+	return v9fs_get_cached_acl(inode, type);
+
+}
+
+static int v9fs_set_acl(struct p9_fid *fid, int type, struct posix_acl *acl)
+{
+	int retval;
+	char *name;
+	size_t size;
+	void *buffer;
+	if (!acl)
+		return 0;
+
+	/* Set a setxattr request to server */
+	size = posix_acl_xattr_size(acl->a_count);
+	buffer = kmalloc(size, GFP_KERNEL);
+	if (!buffer)
+		return -ENOMEM;
+	retval = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
+	if (retval < 0)
+		goto err_free_out;
+	switch (type) {
+	case ACL_TYPE_ACCESS:
+		name = POSIX_ACL_XATTR_ACCESS;
+		break;
+	case ACL_TYPE_DEFAULT:
+		name = POSIX_ACL_XATTR_DEFAULT;
+		break;
+	default:
+		BUG();
+	}
+	retval = v9fs_fid_xattr_set(fid, name, buffer, size, 0);
+err_free_out:
+	kfree(buffer);
+	return retval;
+}
+
+int v9fs_acl_chmod(struct inode *inode, struct p9_fid *fid)
+{
+	int retval = 0;
+	struct posix_acl *acl;
+
+	if (S_ISLNK(inode->i_mode))
+		return -EOPNOTSUPP;
+	acl = v9fs_get_cached_acl(inode, ACL_TYPE_ACCESS);
+	if (acl) {
+		retval = __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
+		if (retval)
+			return retval;
+		set_cached_acl(inode, ACL_TYPE_ACCESS, acl);
+		retval = v9fs_set_acl(fid, ACL_TYPE_ACCESS, acl);
+		posix_acl_release(acl);
+	}
+	return retval;
+}
+
+int v9fs_set_create_acl(struct inode *inode, struct p9_fid *fid,
+			struct posix_acl *dacl, struct posix_acl *acl)
+{
+	set_cached_acl(inode, ACL_TYPE_DEFAULT, dacl);
+	set_cached_acl(inode, ACL_TYPE_ACCESS, acl);
+	v9fs_set_acl(fid, ACL_TYPE_DEFAULT, dacl);
+	v9fs_set_acl(fid, ACL_TYPE_ACCESS, acl);
+	return 0;
+}
+
+void v9fs_put_acl(struct posix_acl *dacl,
+		  struct posix_acl *acl)
+{
+	posix_acl_release(dacl);
+	posix_acl_release(acl);
+}
+
+int v9fs_acl_mode(struct inode *dir, umode_t *modep,
+		  struct posix_acl **dpacl, struct posix_acl **pacl)
+{
+	int retval = 0;
+	umode_t mode = *modep;
+	struct posix_acl *acl = NULL;
+
+	if (!S_ISLNK(mode)) {
+		acl = v9fs_get_cached_acl(dir, ACL_TYPE_DEFAULT);
+		if (IS_ERR(acl))
+			return PTR_ERR(acl);
+		if (!acl)
+			mode &= ~current_umask();
+	}
+	if (acl) {
+		if (S_ISDIR(mode))
+			*dpacl = posix_acl_dup(acl);
+		retval = __posix_acl_create(&acl, GFP_NOFS, &mode);
+		if (retval < 0)
+			return retval;
+		if (retval > 0)
+			*pacl = acl;
+		else
+			posix_acl_release(acl);
+	}
+	*modep  = mode;
+	return 0;
+}
+
+static int v9fs_remote_get_acl(struct dentry *dentry, const char *name,
+			       void *buffer, size_t size, int type)
+{
+	char *full_name;
+
+	switch (type) {
+	case ACL_TYPE_ACCESS:
+		full_name =  POSIX_ACL_XATTR_ACCESS;
+		break;
+	case ACL_TYPE_DEFAULT:
+		full_name = POSIX_ACL_XATTR_DEFAULT;
+		break;
+	default:
+		BUG();
+	}
+	return v9fs_xattr_get(dentry, full_name, buffer, size);
+}
+
+static int v9fs_xattr_get_acl(struct dentry *dentry, const char *name,
+			      void *buffer, size_t size, int type)
+{
+	struct v9fs_session_info *v9ses;
+	struct posix_acl *acl;
+	int error;
+
+	if (strcmp(name, "") != 0)
+		return -EINVAL;
+
+	v9ses = v9fs_dentry2v9ses(dentry);
+	/*
+	 * We allow set/get/list of acl when access=client is not specified
+	 */
+	if ((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT)
+		return v9fs_remote_get_acl(dentry, name, buffer, size, type);
+
+	acl = v9fs_get_cached_acl(dentry->d_inode, type);
+	if (IS_ERR(acl))
+		return PTR_ERR(acl);
+	if (acl == NULL)
+		return -ENODATA;
+	error = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
+	posix_acl_release(acl);
+
+	return error;
+}
+
+static int v9fs_remote_set_acl(struct dentry *dentry, const char *name,
+			      const void *value, size_t size,
+			      int flags, int type)
+{
+	char *full_name;
+
+	switch (type) {
+	case ACL_TYPE_ACCESS:
+		full_name =  POSIX_ACL_XATTR_ACCESS;
+		break;
+	case ACL_TYPE_DEFAULT:
+		full_name = POSIX_ACL_XATTR_DEFAULT;
+		break;
+	default:
+		BUG();
+	}
+	return v9fs_xattr_set(dentry, full_name, value, size, flags);
+}
+
+
+static int v9fs_xattr_set_acl(struct dentry *dentry, const char *name,
+			      const void *value, size_t size,
+			      int flags, int type)
+{
+	int retval;
+	struct posix_acl *acl;
+	struct v9fs_session_info *v9ses;
+	struct inode *inode = dentry->d_inode;
+
+	if (strcmp(name, "") != 0)
+		return -EINVAL;
+
+	v9ses = v9fs_dentry2v9ses(dentry);
+	/*
+	 * set the attribute on the remote. Without even looking at the
+	 * xattr value. We leave it to the server to validate
+	 */
+	if ((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT)
+		return v9fs_remote_set_acl(dentry, name,
+					   value, size, flags, type);
+
+	if (S_ISLNK(inode->i_mode))
+		return -EOPNOTSUPP;
+	if (!inode_owner_or_capable(inode))
+		return -EPERM;
+	if (value) {
+		/* update the cached acl value */
+		acl = posix_acl_from_xattr(&init_user_ns, value, size);
+		if (IS_ERR(acl))
+			return PTR_ERR(acl);
+		else if (acl) {
+			retval = posix_acl_valid(acl);
+			if (retval)
+				goto err_out;
+		}
+	} else
+		acl = NULL;
+
+	switch (type) {
+	case ACL_TYPE_ACCESS:
+		name = POSIX_ACL_XATTR_ACCESS;
+		if (acl) {
+			umode_t mode = inode->i_mode;
+			retval = posix_acl_equiv_mode(acl, &mode);
+			if (retval < 0)
+				goto err_out;
+			else {
+				struct iattr iattr;
+				if (retval == 0) {
+					/*
+					 * ACL can be represented
+					 * by the mode bits. So don't
+					 * update ACL.
+					 */
+					acl = NULL;
+					value = NULL;
+					size = 0;
+				}
+				/* Updte the mode bits */
+				iattr.ia_mode = ((mode & S_IALLUGO) |
+						 (inode->i_mode & ~S_IALLUGO));
+				iattr.ia_valid = ATTR_MODE;
+				/* FIXME should we update ctime ?
+				 * What is the following setxattr update the
+				 * mode ?
+				 */
+				v9fs_vfs_setattr_dotl(dentry, &iattr);
+			}
+		}
+		break;
+	case ACL_TYPE_DEFAULT:
+		name = POSIX_ACL_XATTR_DEFAULT;
+		if (!S_ISDIR(inode->i_mode)) {
+			retval = acl ? -EINVAL : 0;
+			goto err_out;
+		}
+		break;
+	default:
+		BUG();
+	}
+	retval = v9fs_xattr_set(dentry, name, value, size, flags);
+	if (!retval)
+		set_cached_acl(inode, type, acl);
+err_out:
+	posix_acl_release(acl);
+	return retval;
+}
+
+const struct xattr_handler v9fs_xattr_acl_access_handler = {
+	.prefix	= POSIX_ACL_XATTR_ACCESS,
+	.flags	= ACL_TYPE_ACCESS,
+	.get	= v9fs_xattr_get_acl,
+	.set	= v9fs_xattr_set_acl,
+};
+
+const struct xattr_handler v9fs_xattr_acl_default_handler = {
+	.prefix	= POSIX_ACL_XATTR_DEFAULT,
+	.flags	= ACL_TYPE_DEFAULT,
+	.get	= v9fs_xattr_get_acl,
+	.set	= v9fs_xattr_set_acl,
+};
diff --git a/fs/9p/acl.h b/fs/9p/acl.h
new file mode 100644
index 00000000000..e4f7e882272
--- /dev/null
+++ b/fs/9p/acl.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright IBM Corporation, 2010
+ * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2.1 of the GNU Lesser General Public License
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ */
+#ifndef FS_9P_ACL_H
+#define FS_9P_ACL_H
+
+#ifdef CONFIG_9P_FS_POSIX_ACL
+extern int v9fs_get_acl(struct inode *, struct p9_fid *);
+extern struct posix_acl *v9fs_iop_get_acl(struct inode *inode, int type);
+extern int v9fs_acl_chmod(struct inode *, struct p9_fid *);
+extern int v9fs_set_create_acl(struct inode *, struct p9_fid *,
+			       struct posix_acl *, struct posix_acl *);
+extern int v9fs_acl_mode(struct inode *dir, umode_t *modep,
+			 struct posix_acl **dpacl, struct posix_acl **pacl);
+extern void v9fs_put_acl(struct posix_acl *dacl, struct posix_acl *acl);
+#else
+#define v9fs_iop_get_acl NULL
+static inline int v9fs_get_acl(struct inode *inode, struct p9_fid *fid)
+{
+	return 0;
+}
+static inline int v9fs_acl_chmod(struct inode *inode, struct p9_fid *fid)
+{
+	return 0;
+}
+static inline int v9fs_set_create_acl(struct inode *inode,
+				      struct p9_fid *fid,
+				      struct posix_acl *dacl,
+				      struct posix_acl *acl)
+{
+	return 0;
+}
+static inline void v9fs_put_acl(struct posix_acl *dacl,
+				struct posix_acl *acl)
+{
+}
+static inline int v9fs_acl_mode(struct inode *dir, umode_t *modep,
+				struct posix_acl **dpacl,
+				struct posix_acl **pacl)
+{
+	return 0;
+}
+
+#endif
+#endif /* FS_9P_XATTR_H */
diff --git a/fs/9p/cache.c b/fs/9p/cache.c
new file mode 100644
index 00000000000..a69260f2755
--- /dev/null
+++ b/fs/9p/cache.c
@@ -0,0 +1,414 @@
+/*
+ * V9FS cache definitions.
+ *
+ *  Copyright (C) 2009 by Abhishek Kulkarni <adkulkar@umail.iu.edu>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2
+ *  as published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to:
+ *  Free Software Foundation
+ *  51 Franklin Street, Fifth Floor
+ *  Boston, MA  02111-1301  USA
+ *
+ */
+
+#include <linux/jiffies.h>
+#include <linux/file.h>
+#include <linux/slab.h>
+#include <linux/stat.h>
+#include <linux/sched.h>
+#include <linux/fs.h>
+#include <net/9p/9p.h>
+
+#include "v9fs.h"
+#include "cache.h"
+
+#define CACHETAG_LEN  11
+
+struct fscache_netfs v9fs_cache_netfs = {
+	.name 		= "9p",
+	.version 	= 0,
+};
+
+/**
+ * v9fs_random_cachetag - Generate a random tag to be associated
+ *			  with a new cache session.
+ *
+ * The value of jiffies is used for a fairly randomly cache tag.
+ */
+
+static
+int v9fs_random_cachetag(struct v9fs_session_info *v9ses)
+{
+	v9ses->cachetag = kmalloc(CACHETAG_LEN, GFP_KERNEL);
+	if (!v9ses->cachetag)
+		return -ENOMEM;
+
+	return scnprintf(v9ses->cachetag, CACHETAG_LEN, "%lu", jiffies);
+}
+
+static uint16_t v9fs_cache_session_get_key(const void *cookie_netfs_data,
+					   void *buffer, uint16_t bufmax)
+{
+	struct v9fs_session_info *v9ses;
+	uint16_t klen = 0;
+
+	v9ses = (struct v9fs_session_info *)cookie_netfs_data;
+	p9_debug(P9_DEBUG_FSC, "session %p buf %p size %u\n",
+		 v9ses, buffer, bufmax);
+
+	if (v9ses->cachetag)
+		klen = strlen(v9ses->cachetag);
+
+	if (klen > bufmax)
+		return 0;
+
+	memcpy(buffer, v9ses->cachetag, klen);
+	p9_debug(P9_DEBUG_FSC, "cache session tag %s\n", v9ses->cachetag);
+	return klen;
+}
+
+const struct fscache_cookie_def v9fs_cache_session_index_def = {
+	.name		= "9P.session",
+	.type		= FSCACHE_COOKIE_TYPE_INDEX,
+	.get_key	= v9fs_cache_session_get_key,
+};
+
+void v9fs_cache_session_get_cookie(struct v9fs_session_info *v9ses)
+{
+	/* If no cache session tag was specified, we generate a random one. */
+	if (!v9ses->cachetag)
+		v9fs_random_cachetag(v9ses);
+
+	v9ses->fscache = fscache_acquire_cookie(v9fs_cache_netfs.primary_index,
+						&v9fs_cache_session_index_def,
+						v9ses, true);
+	p9_debug(P9_DEBUG_FSC, "session %p get cookie %p\n",
+		 v9ses, v9ses->fscache);
+}
+
+void v9fs_cache_session_put_cookie(struct v9fs_session_info *v9ses)
+{
+	p9_debug(P9_DEBUG_FSC, "session %p put cookie %p\n",
+		 v9ses, v9ses->fscache);
+	fscache_relinquish_cookie(v9ses->fscache, 0);
+	v9ses->fscache = NULL;
+}
+
+
+static uint16_t v9fs_cache_inode_get_key(const void *cookie_netfs_data,
+					 void *buffer, uint16_t bufmax)
+{
+	const struct v9fs_inode *v9inode = cookie_netfs_data;
+	memcpy(buffer, &v9inode->qid.path, sizeof(v9inode->qid.path));
+	p9_debug(P9_DEBUG_FSC, "inode %p get key %llu\n",
+		 &v9inode->vfs_inode, v9inode->qid.path);
+	return sizeof(v9inode->qid.path);
+}
+
+static void v9fs_cache_inode_get_attr(const void *cookie_netfs_data,
+				      uint64_t *size)
+{
+	const struct v9fs_inode *v9inode = cookie_netfs_data;
+	*size = i_size_read(&v9inode->vfs_inode);
+
+	p9_debug(P9_DEBUG_FSC, "inode %p get attr %llu\n",
+		 &v9inode->vfs_inode, *size);
+}
+
+static uint16_t v9fs_cache_inode_get_aux(const void *cookie_netfs_data,
+					 void *buffer, uint16_t buflen)
+{
+	const struct v9fs_inode *v9inode = cookie_netfs_data;
+	memcpy(buffer, &v9inode->qid.version, sizeof(v9inode->qid.version));
+	p9_debug(P9_DEBUG_FSC, "inode %p get aux %u\n",
+		 &v9inode->vfs_inode, v9inode->qid.version);
+	return sizeof(v9inode->qid.version);
+}
+
+static enum
+fscache_checkaux v9fs_cache_inode_check_aux(void *cookie_netfs_data,
+					    const void *buffer,
+					    uint16_t buflen)
+{
+	const struct v9fs_inode *v9inode = cookie_netfs_data;
+
+	if (buflen != sizeof(v9inode->qid.version))
+		return FSCACHE_CHECKAUX_OBSOLETE;
+
+	if (memcmp(buffer, &v9inode->qid.version,
+		   sizeof(v9inode->qid.version)))
+		return FSCACHE_CHECKAUX_OBSOLETE;
+
+	return FSCACHE_CHECKAUX_OKAY;
+}
+
+static void v9fs_cache_inode_now_uncached(void *cookie_netfs_data)
+{
+	struct v9fs_inode *v9inode = cookie_netfs_data;
+	struct pagevec pvec;
+	pgoff_t first;
+	int loop, nr_pages;
+
+	pagevec_init(&pvec, 0);
+	first = 0;
+
+	for (;;) {
+		nr_pages = pagevec_lookup(&pvec, v9inode->vfs_inode.i_mapping,
+					  first,
+					  PAGEVEC_SIZE - pagevec_count(&pvec));
+		if (!nr_pages)
+			break;
+
+		for (loop = 0; loop < nr_pages; loop++)
+			ClearPageFsCache(pvec.pages[loop]);
+
+		first = pvec.pages[nr_pages - 1]->index + 1;
+
+		pvec.nr = nr_pages;
+		pagevec_release(&pvec);
+		cond_resched();
+	}
+}
+
+const struct fscache_cookie_def v9fs_cache_inode_index_def = {
+	.name		= "9p.inode",
+	.type		= FSCACHE_COOKIE_TYPE_DATAFILE,
+	.get_key	= v9fs_cache_inode_get_key,
+	.get_attr	= v9fs_cache_inode_get_attr,
+	.get_aux	= v9fs_cache_inode_get_aux,
+	.check_aux	= v9fs_cache_inode_check_aux,
+	.now_uncached	= v9fs_cache_inode_now_uncached,
+};
+
+void v9fs_cache_inode_get_cookie(struct inode *inode)
+{
+	struct v9fs_inode *v9inode;
+	struct v9fs_session_info *v9ses;
+
+	if (!S_ISREG(inode->i_mode))
+		return;
+
+	v9inode = V9FS_I(inode);
+	if (v9inode->fscache)
+		return;
+
+	v9ses = v9fs_inode2v9ses(inode);
+	v9inode->fscache = fscache_acquire_cookie(v9ses->fscache,
+						  &v9fs_cache_inode_index_def,
+						  v9inode, true);
+
+	p9_debug(P9_DEBUG_FSC, "inode %p get cookie %p\n",
+		 inode, v9inode->fscache);
+}
+
+void v9fs_cache_inode_put_cookie(struct inode *inode)
+{
+	struct v9fs_inode *v9inode = V9FS_I(inode);
+
+	if (!v9inode->fscache)
+		return;
+	p9_debug(P9_DEBUG_FSC, "inode %p put cookie %p\n",
+		 inode, v9inode->fscache);
+
+	fscache_relinquish_cookie(v9inode->fscache, 0);
+	v9inode->fscache = NULL;
+}
+
+void v9fs_cache_inode_flush_cookie(struct inode *inode)
+{
+	struct v9fs_inode *v9inode = V9FS_I(inode);
+
+	if (!v9inode->fscache)
+		return;
+	p9_debug(P9_DEBUG_FSC, "inode %p flush cookie %p\n",
+		 inode, v9inode->fscache);
+
+	fscache_relinquish_cookie(v9inode->fscache, 1);
+	v9inode->fscache = NULL;
+}
+
+void v9fs_cache_inode_set_cookie(struct inode *inode, struct file *filp)
+{
+	struct v9fs_inode *v9inode = V9FS_I(inode);
+
+	if (!v9inode->fscache)
+		return;
+
+	spin_lock(&v9inode->fscache_lock);
+
+	if ((filp->f_flags & O_ACCMODE) != O_RDONLY)
+		v9fs_cache_inode_flush_cookie(inode);
+	else
+		v9fs_cache_inode_get_cookie(inode);
+
+	spin_unlock(&v9inode->fscache_lock);
+}
+
+void v9fs_cache_inode_reset_cookie(struct inode *inode)
+{
+	struct v9fs_inode *v9inode = V9FS_I(inode);
+	struct v9fs_session_info *v9ses;
+	struct fscache_cookie *old;
+
+	if (!v9inode->fscache)
+		return;
+
+	old = v9inode->fscache;
+
+	spin_lock(&v9inode->fscache_lock);
+	fscache_relinquish_cookie(v9inode->fscache, 1);
+
+	v9ses = v9fs_inode2v9ses(inode);
+	v9inode->fscache = fscache_acquire_cookie(v9ses->fscache,
+						  &v9fs_cache_inode_index_def,
+						  v9inode, true);
+	p9_debug(P9_DEBUG_FSC, "inode %p revalidating cookie old %p new %p\n",
+		 inode, old, v9inode->fscache);
+
+	spin_unlock(&v9inode->fscache_lock);
+}
+
+int __v9fs_fscache_release_page(struct page *page, gfp_t gfp)
+{
+	struct inode *inode = page->mapping->host;
+	struct v9fs_inode *v9inode = V9FS_I(inode);
+
+	BUG_ON(!v9inode->fscache);
+
+	return fscache_maybe_release_page(v9inode->fscache, page, gfp);
+}
+
+void __v9fs_fscache_invalidate_page(struct page *page)
+{
+	struct inode *inode = page->mapping->host;
+	struct v9fs_inode *v9inode = V9FS_I(inode);
+
+	BUG_ON(!v9inode->fscache);
+
+	if (PageFsCache(page)) {
+		fscache_wait_on_page_write(v9inode->fscache, page);
+		BUG_ON(!PageLocked(page));
+		fscache_uncache_page(v9inode->fscache, page);
+	}
+}
+
+static void v9fs_vfs_readpage_complete(struct page *page, void *data,
+				       int error)
+{
+	if (!error)
+		SetPageUptodate(page);
+
+	unlock_page(page);
+}
+
+/**
+ * __v9fs_readpage_from_fscache - read a page from cache
+ *
+ * Returns 0 if the pages are in cache and a BIO is submitted,
+ * 1 if the pages are not in cache and -error otherwise.
+ */
+
+int __v9fs_readpage_from_fscache(struct inode *inode, struct page *page)
+{
+	int ret;
+	const struct v9fs_inode *v9inode = V9FS_I(inode);
+
+	p9_debug(P9_DEBUG_FSC, "inode %p page %p\n", inode, page);
+	if (!v9inode->fscache)
+		return -ENOBUFS;
+
+	ret = fscache_read_or_alloc_page(v9inode->fscache,
+					 page,
+					 v9fs_vfs_readpage_complete,
+					 NULL,
+					 GFP_KERNEL);
+	switch (ret) {
+	case -ENOBUFS:
+	case -ENODATA:
+		p9_debug(P9_DEBUG_FSC, "page/inode not in cache %d\n", ret);
+		return 1;
+	case 0:
+		p9_debug(P9_DEBUG_FSC, "BIO submitted\n");
+		return ret;
+	default:
+		p9_debug(P9_DEBUG_FSC, "ret %d\n", ret);
+		return ret;
+	}
+}
+
+/**
+ * __v9fs_readpages_from_fscache - read multiple pages from cache
+ *
+ * Returns 0 if the pages are in cache and a BIO is submitted,
+ * 1 if the pages are not in cache and -error otherwise.
+ */
+
+int __v9fs_readpages_from_fscache(struct inode *inode,
+				  struct address_space *mapping,
+				  struct list_head *pages,
+				  unsigned *nr_pages)
+{
+	int ret;
+	const struct v9fs_inode *v9inode = V9FS_I(inode);
+
+	p9_debug(P9_DEBUG_FSC, "inode %p pages %u\n", inode, *nr_pages);
+	if (!v9inode->fscache)
+		return -ENOBUFS;
+
+	ret = fscache_read_or_alloc_pages(v9inode->fscache,
+					  mapping, pages, nr_pages,
+					  v9fs_vfs_readpage_complete,
+					  NULL,
+					  mapping_gfp_mask(mapping));
+	switch (ret) {
+	case -ENOBUFS:
+	case -ENODATA:
+		p9_debug(P9_DEBUG_FSC, "pages/inodes not in cache %d\n", ret);
+		return 1;
+	case 0:
+		BUG_ON(!list_empty(pages));
+		BUG_ON(*nr_pages != 0);
+		p9_debug(P9_DEBUG_FSC, "BIO submitted\n");
+		return ret;
+	default:
+		p9_debug(P9_DEBUG_FSC, "ret %d\n", ret);
+		return ret;
+	}
+}
+
+/**
+ * __v9fs_readpage_to_fscache - write a page to the cache
+ *
+ */
+
+void __v9fs_readpage_to_fscache(struct inode *inode, struct page *page)
+{
+	int ret;
+	const struct v9fs_inode *v9inode = V9FS_I(inode);
+
+	p9_debug(P9_DEBUG_FSC, "inode %p page %p\n", inode, page);
+	ret = fscache_write_page(v9inode->fscache, page, GFP_KERNEL);
+	p9_debug(P9_DEBUG_FSC, "ret =  %d\n", ret);
+	if (ret != 0)
+		v9fs_uncache_page(inode, page);
+}
+
+/*
+ * wait for a page to complete writing to the cache
+ */
+void __v9fs_fscache_wait_on_page_write(struct inode *inode, struct page *page)
+{
+	const struct v9fs_inode *v9inode = V9FS_I(inode);
+	p9_debug(P9_DEBUG_FSC, "inode %p page %p\n", inode, page);
+	if (PageFsCache(page))
+		fscache_wait_on_page_write(v9inode->fscache, page);
+}
diff --git a/fs/9p/cache.h b/fs/9p/cache.h
new file mode 100644
index 00000000000..2f967549109
--- /dev/null
+++ b/fs/9p/cache.h
@@ -0,0 +1,151 @@
+/*
+ * V9FS cache definitions.
+ *
+ *  Copyright (C) 2009 by Abhishek Kulkarni <adkulkar@umail.iu.edu>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2
+ *  as published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to:
+ *  Free Software Foundation
+ *  51 Franklin Street, Fifth Floor
+ *  Boston, MA  02111-1301  USA
+ *
+ */
+
+#ifndef _9P_CACHE_H
+#ifdef CONFIG_9P_FSCACHE
+#include <linux/fscache.h>
+#include <linux/spinlock.h>
+
+extern struct fscache_netfs v9fs_cache_netfs;
+extern const struct fscache_cookie_def v9fs_cache_session_index_def;
+extern const struct fscache_cookie_def v9fs_cache_inode_index_def;
+
+extern void v9fs_cache_session_get_cookie(struct v9fs_session_info *v9ses);
+extern void v9fs_cache_session_put_cookie(struct v9fs_session_info *v9ses);
+
+extern void v9fs_cache_inode_get_cookie(struct inode *inode);
+extern void v9fs_cache_inode_put_cookie(struct inode *inode);
+extern void v9fs_cache_inode_flush_cookie(struct inode *inode);
+extern void v9fs_cache_inode_set_cookie(struct inode *inode, struct file *filp);
+extern void v9fs_cache_inode_reset_cookie(struct inode *inode);
+
+extern int __v9fs_cache_register(void);
+extern void __v9fs_cache_unregister(void);
+
+extern int __v9fs_fscache_release_page(struct page *page, gfp_t gfp);
+extern void __v9fs_fscache_invalidate_page(struct page *page);
+extern int __v9fs_readpage_from_fscache(struct inode *inode,
+					struct page *page);
+extern int __v9fs_readpages_from_fscache(struct inode *inode,
+					 struct address_space *mapping,
+					 struct list_head *pages,
+					 unsigned *nr_pages);
+extern void __v9fs_readpage_to_fscache(struct inode *inode, struct page *page);
+extern void __v9fs_fscache_wait_on_page_write(struct inode *inode,
+					      struct page *page);
+
+static inline int v9fs_fscache_release_page(struct page *page,
+					    gfp_t gfp)
+{
+	return __v9fs_fscache_release_page(page, gfp);
+}
+
+static inline void v9fs_fscache_invalidate_page(struct page *page)
+{
+	__v9fs_fscache_invalidate_page(page);
+}
+
+static inline int v9fs_readpage_from_fscache(struct inode *inode,
+					     struct page *page)
+{
+	return __v9fs_readpage_from_fscache(inode, page);
+}
+
+static inline int v9fs_readpages_from_fscache(struct inode *inode,
+					      struct address_space *mapping,
+					      struct list_head *pages,
+					      unsigned *nr_pages)
+{
+	return __v9fs_readpages_from_fscache(inode, mapping, pages,
+					     nr_pages);
+}
+
+static inline void v9fs_readpage_to_fscache(struct inode *inode,
+					    struct page *page)
+{
+	if (PageFsCache(page))
+		__v9fs_readpage_to_fscache(inode, page);
+}
+
+static inline void v9fs_uncache_page(struct inode *inode, struct page *page)
+{
+	struct v9fs_inode *v9inode = V9FS_I(inode);
+	fscache_uncache_page(v9inode->fscache, page);
+	BUG_ON(PageFsCache(page));
+}
+
+static inline void v9fs_fscache_wait_on_page_write(struct inode *inode,
+						   struct page *page)
+{
+	return __v9fs_fscache_wait_on_page_write(inode, page);
+}
+
+#else /* CONFIG_9P_FSCACHE */
+
+static inline void v9fs_cache_inode_get_cookie(struct inode *inode)
+{
+}
+
+static inline void v9fs_cache_inode_put_cookie(struct inode *inode)
+{
+}
+
+static inline void v9fs_cache_inode_set_cookie(struct inode *inode, struct file *file)
+{
+}
+
+static inline int v9fs_fscache_release_page(struct page *page,
+					    gfp_t gfp) {
+	return 1;
+}
+
+static inline void v9fs_fscache_invalidate_page(struct page *page) {}
+
+static inline int v9fs_readpage_from_fscache(struct inode *inode,
+					     struct page *page)
+{
+	return -ENOBUFS;
+}
+
+static inline int v9fs_readpages_from_fscache(struct inode *inode,
+					      struct address_space *mapping,
+					      struct list_head *pages,
+					      unsigned *nr_pages)
+{
+	return -ENOBUFS;
+}
+
+static inline void v9fs_readpage_to_fscache(struct inode *inode,
+					    struct page *page)
+{}
+
+static inline void v9fs_uncache_page(struct inode *inode, struct page *page)
+{}
+
+static inline void v9fs_fscache_wait_on_page_write(struct inode *inode,
+						   struct page *page)
+{
+	return;
+}
+
+#endif /* CONFIG_9P_FSCACHE */
+#endif /* _9P_CACHE_H */
diff --git a/fs/9p/fid.c b/fs/9p/fid.c
index 14d94420457..d51ec9fafcc 100644
--- a/fs/9p/fid.c
+++ b/fs/9p/fid.c
@@ -24,6 +24,7 @@
 #include <linux/module.h>
 #include <linux/errno.h>
 #include <linux/fs.h>
+#include <linux/slab.h>
 #include <linux/sched.h>
 #include <linux/idr.h>
 #include <net/9p/9p.h>
@@ -40,29 +41,16 @@
  *
  */
 
-int v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid)
+static inline void __add_fid(struct dentry *dentry, struct p9_fid *fid)
 {
-	struct v9fs_dentry *dent;
-
-	P9_DPRINTK(P9_DEBUG_VFS, "fid %d dentry %s\n",
-					fid->fid, dentry->d_name.name);
-
-	dent = dentry->d_fsdata;
-	if (!dent) {
-		dent = kmalloc(sizeof(struct v9fs_dentry), GFP_KERNEL);
-		if (!dent)
-			return -ENOMEM;
-
-		spin_lock_init(&dent->lock);
-		INIT_LIST_HEAD(&dent->fidlist);
-		dentry->d_fsdata = dent;
-	}
-
-	spin_lock(&dent->lock);
-	list_add(&fid->dlist, &dent->fidlist);
-	spin_unlock(&dent->lock);
+	hlist_add_head(&fid->dlist, (struct hlist_head *)&dentry->d_fsdata);
+}
 
-	return 0;
+void v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid)
+{
+	spin_lock(&dentry->d_lock);
+	__add_fid(dentry, fid);
+	spin_unlock(&dentry->d_lock);
 }
 
 /**
@@ -73,29 +61,163 @@ int v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid)
  *
  */
 
-static struct p9_fid *v9fs_fid_find(struct dentry *dentry, u32 uid, int any)
+static struct p9_fid *v9fs_fid_find(struct dentry *dentry, kuid_t uid, int any)
 {
-	struct v9fs_dentry *dent;
 	struct p9_fid *fid, *ret;
 
-	P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p) uid %d any %d\n",
-		dentry->d_name.name, dentry, uid, any);
-	dent = (struct v9fs_dentry *) dentry->d_fsdata;
+	p9_debug(P9_DEBUG_VFS, " dentry: %s (%p) uid %d any %d\n",
+		 dentry->d_name.name, dentry, from_kuid(&init_user_ns, uid),
+		 any);
 	ret = NULL;
-	if (dent) {
-		spin_lock(&dent->lock);
-		list_for_each_entry(fid, &dent->fidlist, dlist) {
-			if (any || fid->uid == uid) {
+	/* we'll recheck under lock if there's anything to look in */
+	if (dentry->d_fsdata) {
+		struct hlist_head *h = (struct hlist_head *)&dentry->d_fsdata;
+		spin_lock(&dentry->d_lock);
+		hlist_for_each_entry(fid, h, dlist) {
+			if (any || uid_eq(fid->uid, uid)) {
 				ret = fid;
 				break;
 			}
 		}
-		spin_unlock(&dent->lock);
+		spin_unlock(&dentry->d_lock);
 	}
 
 	return ret;
 }
 
+/*
+ * We need to hold v9ses->rename_sem as long as we hold references
+ * to returned path array. Array element contain pointers to
+ * dentry names.
+ */
+static int build_path_from_dentry(struct v9fs_session_info *v9ses,
+				  struct dentry *dentry, char ***names)
+{
+	int n = 0, i;
+	char **wnames;
+	struct dentry *ds;
+
+	for (ds = dentry; !IS_ROOT(ds); ds = ds->d_parent)
+		n++;
+
+	wnames = kmalloc(sizeof(char *) * n, GFP_KERNEL);
+	if (!wnames)
+		goto err_out;
+
+	for (ds = dentry, i = (n-1); i >= 0; i--, ds = ds->d_parent)
+		wnames[i] = (char  *)ds->d_name.name;
+
+	*names = wnames;
+	return n;
+err_out:
+	return -ENOMEM;
+}
+
+static struct p9_fid *v9fs_fid_lookup_with_uid(struct dentry *dentry,
+					       kuid_t uid, int any)
+{
+	struct dentry *ds;
+	char **wnames, *uname;
+	int i, n, l, clone, access;
+	struct v9fs_session_info *v9ses;
+	struct p9_fid *fid, *old_fid = NULL;
+
+	v9ses = v9fs_dentry2v9ses(dentry);
+	access = v9ses->flags & V9FS_ACCESS_MASK;
+	fid = v9fs_fid_find(dentry, uid, any);
+	if (fid)
+		return fid;
+	/*
+	 * we don't have a matching fid. To do a TWALK we need
+	 * parent fid. We need to prevent rename when we want to
+	 * look at the parent.
+	 */
+	down_read(&v9ses->rename_sem);
+	ds = dentry->d_parent;
+	fid = v9fs_fid_find(ds, uid, any);
+	if (fid) {
+		/* Found the parent fid do a lookup with that */
+		fid = p9_client_walk(fid, 1, (char **)&dentry->d_name.name, 1);
+		goto fid_out;
+	}
+	up_read(&v9ses->rename_sem);
+
+	/* start from the root and try to do a lookup */
+	fid = v9fs_fid_find(dentry->d_sb->s_root, uid, any);
+	if (!fid) {
+		/* the user is not attached to the fs yet */
+		if (access == V9FS_ACCESS_SINGLE)
+			return ERR_PTR(-EPERM);
+
+		if (v9fs_proto_dotu(v9ses) || v9fs_proto_dotl(v9ses))
+				uname = NULL;
+		else
+			uname = v9ses->uname;
+
+		fid = p9_client_attach(v9ses->clnt, NULL, uname, uid,
+				       v9ses->aname);
+		if (IS_ERR(fid))
+			return fid;
+
+		v9fs_fid_add(dentry->d_sb->s_root, fid);
+	}
+	/* If we are root ourself just return that */
+	if (dentry->d_sb->s_root == dentry)
+		return fid;
+	/*
+	 * Do a multipath walk with attached root.
+	 * When walking parent we need to make sure we
+	 * don't have a parallel rename happening
+	 */
+	down_read(&v9ses->rename_sem);
+	n  = build_path_from_dentry(v9ses, dentry, &wnames);
+	if (n < 0) {
+		fid = ERR_PTR(n);
+		goto err_out;
+	}
+	clone = 1;
+	i = 0;
+	while (i < n) {
+		l = min(n - i, P9_MAXWELEM);
+		/*
+		 * We need to hold rename lock when doing a multipath
+		 * walk to ensure none of the patch component change
+		 */
+		fid = p9_client_walk(fid, l, &wnames[i], clone);
+		if (IS_ERR(fid)) {
+			if (old_fid) {
+				/*
+				 * If we fail, clunk fid which are mapping
+				 * to path component and not the last component
+				 * of the path.
+				 */
+				p9_client_clunk(old_fid);
+			}
+			kfree(wnames);
+			goto err_out;
+		}
+		old_fid = fid;
+		i += l;
+		clone = 0;
+	}
+	kfree(wnames);
+fid_out:
+	if (!IS_ERR(fid)) {
+		spin_lock(&dentry->d_lock);
+		if (d_unhashed(dentry)) {
+			spin_unlock(&dentry->d_lock);
+			p9_client_clunk(fid);
+			fid = ERR_PTR(-ENOENT);
+		} else {
+			__add_fid(dentry, fid);
+			spin_unlock(&dentry->d_lock);
+		}
+	}
+err_out:
+	up_read(&v9ses->rename_sem);
+	return fid;
+}
+
 /**
  * v9fs_fid_lookup - lookup for a fid, try to walk if not found
  * @dentry: dentry to look for fid in
@@ -108,18 +230,16 @@ static struct p9_fid *v9fs_fid_find(struct dentry *dentry, u32 uid, int any)
 
 struct p9_fid *v9fs_fid_lookup(struct dentry *dentry)
 {
-	int i, n, l, clone, any, access;
-	u32 uid;
-	struct p9_fid *fid;
-	struct dentry *d, *ds;
+	kuid_t uid;
+	int  any, access;
 	struct v9fs_session_info *v9ses;
-	char **wnames, *uname;
 
-	v9ses = v9fs_inode2v9ses(dentry->d_inode);
+	v9ses = v9fs_dentry2v9ses(dentry);
 	access = v9ses->flags & V9FS_ACCESS_MASK;
 	switch (access) {
 	case V9FS_ACCESS_SINGLE:
 	case V9FS_ACCESS_USER:
+	case V9FS_ACCESS_CLIENT:
 		uid = current_fsuid();
 		any = 0;
 		break;
@@ -130,80 +250,57 @@ struct p9_fid *v9fs_fid_lookup(struct dentry *dentry)
 		break;
 
 	default:
-		uid = ~0;
+		uid = INVALID_UID;
 		any = 0;
 		break;
 	}
+	return v9fs_fid_lookup_with_uid(dentry, uid, any);
+}
 
-	fid = v9fs_fid_find(dentry, uid, any);
-	if (fid)
-		return fid;
-
-	ds = dentry->d_parent;
-	fid = v9fs_fid_find(ds, uid, any);
-	if (!fid) { /* walk from the root */
-		n = 0;
-		for (ds = dentry; !IS_ROOT(ds); ds = ds->d_parent)
-			n++;
-
-		fid = v9fs_fid_find(ds, uid, any);
-		if (!fid) { /* the user is not attached to the fs yet */
-			if (access == V9FS_ACCESS_SINGLE)
-				return ERR_PTR(-EPERM);
-
-			if (v9fs_extended(v9ses))
-				uname = NULL;
-			else
-				uname = v9ses->uname;
-
-			fid = p9_client_attach(v9ses->clnt, NULL, uname, uid,
-				v9ses->aname);
-
-			if (IS_ERR(fid))
-				return fid;
-
-			v9fs_fid_add(ds, fid);
-		}
-	} else /* walk from the parent */
-		n = 1;
+struct p9_fid *v9fs_fid_clone(struct dentry *dentry)
+{
+	struct p9_fid *fid, *ret;
 
-	if (ds == dentry)
+	fid = v9fs_fid_lookup(dentry);
+	if (IS_ERR(fid))
 		return fid;
 
-	wnames = kmalloc(sizeof(char *) * n, GFP_KERNEL);
-	if (!wnames)
-		return ERR_PTR(-ENOMEM);
-
-	for (d = dentry, i = (n-1); i >= 0; i--, d = d->d_parent)
-		wnames[i] = (char *) d->d_name.name;
-
-	clone = 1;
-	i = 0;
-	while (i < n) {
-		l = min(n - i, P9_MAXWELEM);
-		fid = p9_client_walk(fid, l, &wnames[i], clone);
-		if (IS_ERR(fid)) {
-			kfree(wnames);
-			return fid;
-		}
-
-		i += l;
-		clone = 0;
-	}
-
-	kfree(wnames);
-	v9fs_fid_add(dentry, fid);
-	return fid;
+	ret = p9_client_walk(fid, 0, NULL, 1);
+	return ret;
 }
 
-struct p9_fid *v9fs_fid_clone(struct dentry *dentry)
+static struct p9_fid *v9fs_fid_clone_with_uid(struct dentry *dentry, kuid_t uid)
 {
 	struct p9_fid *fid, *ret;
 
-	fid = v9fs_fid_lookup(dentry);
+	fid = v9fs_fid_lookup_with_uid(dentry, uid, 0);
 	if (IS_ERR(fid))
 		return fid;
 
 	ret = p9_client_walk(fid, 0, NULL, 1);
 	return ret;
 }
+
+struct p9_fid *v9fs_writeback_fid(struct dentry *dentry)
+{
+	int err;
+	struct p9_fid *fid;
+
+	fid = v9fs_fid_clone_with_uid(dentry, GLOBAL_ROOT_UID);
+	if (IS_ERR(fid))
+		goto error_out;
+	/*
+	 * writeback fid will only be used to write back the
+	 * dirty pages. We always request for the open fid in read-write
+	 * mode so that a partial page write which result in page
+	 * read can work.
+	 */
+	err = p9_client_open(fid, O_RDWR);
+	if (err < 0) {
+		p9_client_clunk(fid);
+		fid = ERR_PTR(err);
+		goto error_out;
+	}
+error_out:
+	return fid;
+}
diff --git a/fs/9p/fid.h b/fs/9p/fid.h
index c3bbd6af996..2b6787fcb62 100644
--- a/fs/9p/fid.h
+++ b/fs/9p/fid.h
@@ -19,29 +19,12 @@
  *  Boston, MA  02111-1301  USA
  *
  */
-
+#ifndef FS_9P_FID_H
+#define FS_9P_FID_H
 #include <linux/list.h>
 
-/**
- * struct v9fs_dentry - 9p private data stored in dentry d_fsdata
- * @lock: protects the fidlist
- * @fidlist: list of FIDs currently associated with this dentry
- *
- * This structure defines the 9p private data associated with
- * a particular dentry.  In particular, this private data is used
- * to lookup which 9P FID handle should be used for a particular VFS
- * operation.  FID handles are associated with dentries instead of
- * inodes in order to more closely map functionality to the Plan 9
- * expected behavior for FID reclaimation and tracking.
- *
- * See Also: Mapping FIDs to Linux VFS model in
- * Design and Implementation of the Linux 9P File System documentation
- */
-struct v9fs_dentry {
-	spinlock_t lock; /* protect fidlist */
-	struct list_head fidlist;
-};
-
 struct p9_fid *v9fs_fid_lookup(struct dentry *dentry);
 struct p9_fid *v9fs_fid_clone(struct dentry *dentry);
-int v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid);
+void v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid);
+struct p9_fid *v9fs_writeback_fid(struct dentry *dentry);
+#endif
diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c
index 332b5ff02fe..6894b085f0e 100644
--- a/fs/9p/v9fs.c
+++ b/fs/9p/v9fs.c
@@ -23,34 +23,42 @@
  *
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/module.h>
 #include <linux/errno.h>
 #include <linux/fs.h>
 #include <linux/sched.h>
 #include <linux/parser.h>
 #include <linux/idr.h>
+#include <linux/slab.h>
 #include <net/9p/9p.h>
 #include <net/9p/client.h>
 #include <net/9p/transport.h>
 #include "v9fs.h"
 #include "v9fs_vfs.h"
+#include "cache.h"
+
+static DEFINE_SPINLOCK(v9fs_sessionlist_lock);
+static LIST_HEAD(v9fs_sessionlist);
+struct kmem_cache *v9fs_inode_cache;
 
 /*
-  * Option Parsing (code inspired by NFS code)
-  *  NOTE: each transport will parse its own options
-  */
+ * Option Parsing (code inspired by NFS code)
+ *  NOTE: each transport will parse its own options
+ */
 
 enum {
 	/* Options that take integer arguments */
 	Opt_debug, Opt_dfltuid, Opt_dfltgid, Opt_afid,
 	/* String options */
-	Opt_uname, Opt_remotename, Opt_trans,
+	Opt_uname, Opt_remotename, Opt_trans, Opt_cache, Opt_cachetag,
 	/* Options that take no arguments */
 	Opt_nodevmap,
 	/* Cache options */
-	Opt_cache_loose,
+	Opt_cache_loose, Opt_fscache, Opt_mmap,
 	/* Access options */
-	Opt_access,
+	Opt_access, Opt_posixacl,
 	/* Error token */
 	Opt_err
 };
@@ -63,12 +71,38 @@ static const match_table_t tokens = {
 	{Opt_uname, "uname=%s"},
 	{Opt_remotename, "aname=%s"},
 	{Opt_nodevmap, "nodevmap"},
-	{Opt_cache_loose, "cache=loose"},
+	{Opt_cache, "cache=%s"},
 	{Opt_cache_loose, "loose"},
+	{Opt_fscache, "fscache"},
+	{Opt_mmap, "mmap"},
+	{Opt_cachetag, "cachetag=%s"},
 	{Opt_access, "access=%s"},
+	{Opt_posixacl, "posixacl"},
 	{Opt_err, NULL}
 };
 
+/* Interpret mount options for cache mode */
+static int get_cache_mode(char *s)
+{
+	int version = -EINVAL;
+
+	if (!strcmp(s, "loose")) {
+		version = CACHE_LOOSE;
+		p9_debug(P9_DEBUG_9P, "Cache mode: loose\n");
+	} else if (!strcmp(s, "fscache")) {
+		version = CACHE_FSCACHE;
+		p9_debug(P9_DEBUG_9P, "Cache mode: fscache\n");
+	} else if (!strcmp(s, "mmap")) {
+		version = CACHE_MMAP;
+		p9_debug(P9_DEBUG_9P, "Cache mode: mmap\n");
+	} else if (!strcmp(s, "none")) {
+		version = CACHE_NONE;
+		p9_debug(P9_DEBUG_9P, "Cache mode: none\n");
+	} else
+		pr_info("Unknown Cache mode %s\n", s);
+	return version;
+}
+
 /**
  * v9fs_parse_options - parse mount options into session structure
  * @v9ses: existing v9fs session information
@@ -76,9 +110,9 @@ static const match_table_t tokens = {
  * Return 0 upon success, -ERRNO upon failure.
  */
 
-static int v9fs_parse_options(struct v9fs_session_info *v9ses)
+static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts)
 {
-	char *options;
+	char *options, *tmp_options;
 	substring_t args[MAX_OPT_ARGS];
 	char *p;
 	int option = 0;
@@ -88,34 +122,35 @@ static int v9fs_parse_options(struct v9fs_session_info *v9ses)
 	/* setup defaults */
 	v9ses->afid = ~0;
 	v9ses->debug = 0;
-	v9ses->cache = 0;
+	v9ses->cache = CACHE_NONE;
+#ifdef CONFIG_9P_FSCACHE
+	v9ses->cachetag = NULL;
+#endif
 
-	if (!v9ses->options)
+	if (!opts)
 		return 0;
 
-	options = kstrdup(v9ses->options, GFP_KERNEL);
-	if (!options) {
-		P9_DPRINTK(P9_DEBUG_ERROR,
-			   "failed to allocate copy of option string\n");
-		return -ENOMEM;
+	tmp_options = kstrdup(opts, GFP_KERNEL);
+	if (!tmp_options) {
+		ret = -ENOMEM;
+		goto fail_option_alloc;
 	}
+	options = tmp_options;
 
 	while ((p = strsep(&options, ",")) != NULL) {
-		int token;
+		int token, r;
 		if (!*p)
 			continue;
 		token = match_token(p, tokens, args);
-		if (token < Opt_uname) {
-			int r = match_int(&args[0], &option);
+		switch (token) {
+		case Opt_debug:
+			r = match_int(&args[0], &option);
 			if (r < 0) {
-				P9_DPRINTK(P9_DEBUG_ERROR,
-					"integer field, but no integer?\n");
+				p9_debug(P9_DEBUG_ERROR,
+					 "integer field, but no integer?\n");
 				ret = r;
 				continue;
 			}
-		}
-		switch (token) {
-		case Opt_debug:
 			v9ses->debug = option;
 #ifdef CONFIG_NET_9P_DEBUG
 			p9_debug_level = option;
@@ -123,19 +158,62 @@ static int v9fs_parse_options(struct v9fs_session_info *v9ses)
 			break;
 
 		case Opt_dfltuid:
-			v9ses->dfltuid = option;
+			r = match_int(&args[0], &option);
+			if (r < 0) {
+				p9_debug(P9_DEBUG_ERROR,
+					 "integer field, but no integer?\n");
+				ret = r;
+				continue;
+			}
+			v9ses->dfltuid = make_kuid(current_user_ns(), option);
+			if (!uid_valid(v9ses->dfltuid)) {
+				p9_debug(P9_DEBUG_ERROR,
+					 "uid field, but not a uid?\n");
+				ret = -EINVAL;
+				continue;
+			}
 			break;
 		case Opt_dfltgid:
-			v9ses->dfltgid = option;
+			r = match_int(&args[0], &option);
+			if (r < 0) {
+				p9_debug(P9_DEBUG_ERROR,
+					 "integer field, but no integer?\n");
+				ret = r;
+				continue;
+			}
+			v9ses->dfltgid = make_kgid(current_user_ns(), option);
+			if (!gid_valid(v9ses->dfltgid)) {
+				p9_debug(P9_DEBUG_ERROR,
+					 "gid field, but not a gid?\n");
+				ret = -EINVAL;
+				continue;
+			}
 			break;
 		case Opt_afid:
+			r = match_int(&args[0], &option);
+			if (r < 0) {
+				p9_debug(P9_DEBUG_ERROR,
+					 "integer field, but no integer?\n");
+				ret = r;
+				continue;
+			}
 			v9ses->afid = option;
 			break;
 		case Opt_uname:
-			match_strlcpy(v9ses->uname, &args[0], PATH_MAX);
+			kfree(v9ses->uname);
+			v9ses->uname = match_strdup(&args[0]);
+			if (!v9ses->uname) {
+				ret = -ENOMEM;
+				goto free_and_return;
+			}
 			break;
 		case Opt_remotename:
-			match_strlcpy(v9ses->aname, &args[0], PATH_MAX);
+			kfree(v9ses->aname);
+			v9ses->aname = match_strdup(&args[0]);
+			if (!v9ses->aname) {
+				ret = -ENOMEM;
+				goto free_and_return;
+			}
 			break;
 		case Opt_nodevmap:
 			v9ses->nodev = 1;
@@ -143,35 +221,91 @@ static int v9fs_parse_options(struct v9fs_session_info *v9ses)
 		case Opt_cache_loose:
 			v9ses->cache = CACHE_LOOSE;
 			break;
+		case Opt_fscache:
+			v9ses->cache = CACHE_FSCACHE;
+			break;
+		case Opt_mmap:
+			v9ses->cache = CACHE_MMAP;
+			break;
+		case Opt_cachetag:
+#ifdef CONFIG_9P_FSCACHE
+			v9ses->cachetag = match_strdup(&args[0]);
+#endif
+			break;
+		case Opt_cache:
+			s = match_strdup(&args[0]);
+			if (!s) {
+				ret = -ENOMEM;
+				p9_debug(P9_DEBUG_ERROR,
+					 "problem allocating copy of cache arg\n");
+				goto free_and_return;
+			}
+			ret = get_cache_mode(s);
+			if (ret == -EINVAL) {
+				kfree(s);
+				goto free_and_return;
+			}
+
+			v9ses->cache = ret;
+			kfree(s);
+			break;
 
 		case Opt_access:
 			s = match_strdup(&args[0]);
 			if (!s) {
-				P9_DPRINTK(P9_DEBUG_ERROR,
-					   "failed to allocate copy"
-					   " of option argument\n");
 				ret = -ENOMEM;
-				break;
+				p9_debug(P9_DEBUG_ERROR,
+					 "problem allocating copy of access arg\n");
+				goto free_and_return;
 			}
+
 			v9ses->flags &= ~V9FS_ACCESS_MASK;
 			if (strcmp(s, "user") == 0)
 				v9ses->flags |= V9FS_ACCESS_USER;
 			else if (strcmp(s, "any") == 0)
 				v9ses->flags |= V9FS_ACCESS_ANY;
-			else {
+			else if (strcmp(s, "client") == 0) {
+				v9ses->flags |= V9FS_ACCESS_CLIENT;
+			} else {
+				uid_t uid;
 				v9ses->flags |= V9FS_ACCESS_SINGLE;
-				v9ses->uid = simple_strtoul(s, &e, 10);
-				if (*e != '\0')
-					v9ses->uid = ~0;
+				uid = simple_strtoul(s, &e, 10);
+				if (*e != '\0') {
+					ret = -EINVAL;
+					pr_info("Unknown access argument %s\n",
+						s);
+					kfree(s);
+					goto free_and_return;
+				}
+				v9ses->uid = make_kuid(current_user_ns(), uid);
+				if (!uid_valid(v9ses->uid)) {
+					ret = -EINVAL;
+					pr_info("Uknown uid %s\n", s);
+					kfree(s);
+					goto free_and_return;
+				}
 			}
+
 			kfree(s);
 			break;
 
+		case Opt_posixacl:
+#ifdef CONFIG_9P_FS_POSIX_ACL
+			v9ses->flags |= V9FS_POSIX_ACL;
+#else
+			p9_debug(P9_DEBUG_ERROR,
+				 "Not defined CONFIG_9P_FS_POSIX_ACL. Ignoring posixacl option\n");
+#endif
+			break;
+
 		default:
 			continue;
 		}
 	}
-	kfree(options);
+
+free_and_return:
+	kfree(tmp_options);
+fail_option_alloc:
 	return ret;
 }
 
@@ -190,78 +324,107 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses,
 	struct p9_fid *fid;
 	int rc;
 
-	v9ses->uname = __getname();
+	v9ses->uname = kstrdup(V9FS_DEFUSER, GFP_KERNEL);
 	if (!v9ses->uname)
 		return ERR_PTR(-ENOMEM);
 
-	v9ses->aname = __getname();
+	v9ses->aname = kstrdup(V9FS_DEFANAME, GFP_KERNEL);
 	if (!v9ses->aname) {
-		__putname(v9ses->uname);
+		kfree(v9ses->uname);
 		return ERR_PTR(-ENOMEM);
 	}
+	init_rwsem(&v9ses->rename_sem);
 
-	v9ses->flags = V9FS_EXTENDED | V9FS_ACCESS_USER;
-	strcpy(v9ses->uname, V9FS_DEFUSER);
-	strcpy(v9ses->aname, V9FS_DEFANAME);
-	v9ses->uid = ~0;
-	v9ses->dfltuid = V9FS_DEFUID;
-	v9ses->dfltgid = V9FS_DEFGID;
-	if (data) {
-		v9ses->options = kstrdup(data, GFP_KERNEL);
-		if (!v9ses->options) {
-			P9_DPRINTK(P9_DEBUG_ERROR,
-			   "failed to allocate copy of option string\n");
-			retval = -ENOMEM;
-			goto error;
-		}
+	rc = bdi_setup_and_register(&v9ses->bdi, "9p", BDI_CAP_MAP_COPY);
+	if (rc) {
+		kfree(v9ses->aname);
+		kfree(v9ses->uname);
+		return ERR_PTR(rc);
 	}
 
-	rc = v9fs_parse_options(v9ses);
-	if (rc < 0) {
-		retval = rc;
-		goto error;
-	}
+	spin_lock(&v9fs_sessionlist_lock);
+	list_add(&v9ses->slist, &v9fs_sessionlist);
+	spin_unlock(&v9fs_sessionlist_lock);
 
-	v9ses->clnt = p9_client_create(dev_name, v9ses->options);
+	v9ses->uid = INVALID_UID;
+	v9ses->dfltuid = V9FS_DEFUID;
+	v9ses->dfltgid = V9FS_DEFGID;
 
+	v9ses->clnt = p9_client_create(dev_name, data);
 	if (IS_ERR(v9ses->clnt)) {
 		retval = PTR_ERR(v9ses->clnt);
 		v9ses->clnt = NULL;
-		P9_DPRINTK(P9_DEBUG_ERROR, "problem initializing 9p client\n");
+		p9_debug(P9_DEBUG_ERROR, "problem initializing 9p client\n");
 		goto error;
 	}
 
-	if (!v9ses->clnt->dotu)
-		v9ses->flags &= ~V9FS_EXTENDED;
+	v9ses->flags = V9FS_ACCESS_USER;
+
+	if (p9_is_proto_dotl(v9ses->clnt)) {
+		v9ses->flags = V9FS_ACCESS_CLIENT;
+		v9ses->flags |= V9FS_PROTO_2000L;
+	} else if (p9_is_proto_dotu(v9ses->clnt)) {
+		v9ses->flags |= V9FS_PROTO_2000U;
+	}
+
+	rc = v9fs_parse_options(v9ses, data);
+	if (rc < 0) {
+		retval = rc;
+		goto error;
+	}
 
 	v9ses->maxdata = v9ses->clnt->msize - P9_IOHDRSZ;
 
+	if (!v9fs_proto_dotl(v9ses) &&
+	    ((v9ses->flags & V9FS_ACCESS_MASK) == V9FS_ACCESS_CLIENT)) {
+		/*
+		 * We support ACCESS_CLIENT only for dotl.
+		 * Fall back to ACCESS_USER
+		 */
+		v9ses->flags &= ~V9FS_ACCESS_MASK;
+		v9ses->flags |= V9FS_ACCESS_USER;
+	}
+	/*FIXME !! */
 	/* for legacy mode, fall back to V9FS_ACCESS_ANY */
-	if (!v9fs_extended(v9ses) &&
+	if (!(v9fs_proto_dotu(v9ses) || v9fs_proto_dotl(v9ses)) &&
 		((v9ses->flags&V9FS_ACCESS_MASK) == V9FS_ACCESS_USER)) {
 
 		v9ses->flags &= ~V9FS_ACCESS_MASK;
 		v9ses->flags |= V9FS_ACCESS_ANY;
-		v9ses->uid = ~0;
+		v9ses->uid = INVALID_UID;
+	}
+	if (!v9fs_proto_dotl(v9ses) ||
+		!((v9ses->flags & V9FS_ACCESS_MASK) == V9FS_ACCESS_CLIENT)) {
+		/*
+		 * We support ACL checks on clinet only if the protocol is
+		 * 9P2000.L and access is V9FS_ACCESS_CLIENT.
+		 */
+		v9ses->flags &= ~V9FS_ACL_MASK;
 	}
 
-	fid = p9_client_attach(v9ses->clnt, NULL, v9ses->uname, ~0,
+	fid = p9_client_attach(v9ses->clnt, NULL, v9ses->uname, INVALID_UID,
 							v9ses->aname);
 	if (IS_ERR(fid)) {
 		retval = PTR_ERR(fid);
 		fid = NULL;
-		P9_DPRINTK(P9_DEBUG_ERROR, "cannot attach\n");
+		p9_debug(P9_DEBUG_ERROR, "cannot attach\n");
 		goto error;
 	}
 
 	if ((v9ses->flags & V9FS_ACCESS_MASK) == V9FS_ACCESS_SINGLE)
 		fid->uid = v9ses->uid;
 	else
-		fid->uid = ~0;
+		fid->uid = INVALID_UID;
+
+#ifdef CONFIG_9P_FSCACHE
+	/* register the session for caching */
+	v9fs_cache_session_get_cookie(v9ses);
+#endif
 
 	return fid;
 
 error:
+	bdi_destroy(&v9ses->bdi);
 	return ERR_PTR(retval);
 }
 
@@ -278,9 +441,20 @@ void v9fs_session_close(struct v9fs_session_info *v9ses)
 		v9ses->clnt = NULL;
 	}
 
-	__putname(v9ses->uname);
-	__putname(v9ses->aname);
-	kfree(v9ses->options);
+#ifdef CONFIG_9P_FSCACHE
+	if (v9ses->fscache) {
+		v9fs_cache_session_put_cookie(v9ses);
+		kfree(v9ses->cachetag);
+	}
+#endif
+	kfree(v9ses->uname);
+	kfree(v9ses->aname);
+
+	bdi_destroy(&v9ses->bdi);
+
+	spin_lock(&v9fs_sessionlist_lock);
+	list_del(&v9ses->slist);
+	spin_unlock(&v9fs_sessionlist_lock);
 }
 
 /**
@@ -291,31 +465,214 @@ void v9fs_session_close(struct v9fs_session_info *v9ses)
  */
 
 void v9fs_session_cancel(struct v9fs_session_info *v9ses) {
-	P9_DPRINTK(P9_DEBUG_ERROR, "cancel session %p\n", v9ses);
+	p9_debug(P9_DEBUG_ERROR, "cancel session %p\n", v9ses);
 	p9_client_disconnect(v9ses->clnt);
 }
 
+/**
+ * v9fs_session_begin_cancel - Begin terminate of a session
+ * @v9ses: session to terminate
+ *
+ * After this call we don't allow any request other than clunk.
+ */
+
+void v9fs_session_begin_cancel(struct v9fs_session_info *v9ses)
+{
+	p9_debug(P9_DEBUG_ERROR, "begin cancel session %p\n", v9ses);
+	p9_client_begin_disconnect(v9ses->clnt);
+}
+
 extern int v9fs_error_init(void);
 
+static struct kobject *v9fs_kobj;
+
+#ifdef CONFIG_9P_FSCACHE
+/**
+ * caches_show - list caches associated with a session
+ *
+ * Returns the size of buffer written.
+ */
+
+static ssize_t caches_show(struct kobject *kobj,
+			   struct kobj_attribute *attr,
+			   char *buf)
+{
+	ssize_t n = 0, count = 0, limit = PAGE_SIZE;
+	struct v9fs_session_info *v9ses;
+
+	spin_lock(&v9fs_sessionlist_lock);
+	list_for_each_entry(v9ses, &v9fs_sessionlist, slist) {
+		if (v9ses->cachetag) {
+			n = snprintf(buf, limit, "%s\n", v9ses->cachetag);
+			if (n < 0) {
+				count = n;
+				break;
+			}
+
+			count += n;
+			limit -= n;
+		}
+	}
+
+	spin_unlock(&v9fs_sessionlist_lock);
+	return count;
+}
+
+static struct kobj_attribute v9fs_attr_cache = __ATTR_RO(caches);
+#endif /* CONFIG_9P_FSCACHE */
+
+static struct attribute *v9fs_attrs[] = {
+#ifdef CONFIG_9P_FSCACHE
+	&v9fs_attr_cache.attr,
+#endif
+	NULL,
+};
+
+static struct attribute_group v9fs_attr_group = {
+	.attrs = v9fs_attrs,
+};
+
+/**
+ * v9fs_sysfs_init - Initialize the v9fs sysfs interface
+ *
+ */
+
+static int __init v9fs_sysfs_init(void)
+{
+	v9fs_kobj = kobject_create_and_add("9p", fs_kobj);
+	if (!v9fs_kobj)
+		return -ENOMEM;
+
+	if (sysfs_create_group(v9fs_kobj, &v9fs_attr_group)) {
+		kobject_put(v9fs_kobj);
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
 /**
- * v9fs_init - Initialize module
+ * v9fs_sysfs_cleanup - Unregister the v9fs sysfs interface
+ *
+ */
+
+static void v9fs_sysfs_cleanup(void)
+{
+	sysfs_remove_group(v9fs_kobj, &v9fs_attr_group);
+	kobject_put(v9fs_kobj);
+}
+
+static void v9fs_inode_init_once(void *foo)
+{
+	struct v9fs_inode *v9inode = (struct v9fs_inode *)foo;
+#ifdef CONFIG_9P_FSCACHE
+	v9inode->fscache = NULL;
+#endif
+	memset(&v9inode->qid, 0, sizeof(v9inode->qid));
+	inode_init_once(&v9inode->vfs_inode);
+}
+
+/**
+ * v9fs_init_inode_cache - initialize a cache for 9P
+ * Returns 0 on success.
+ */
+static int v9fs_init_inode_cache(void)
+{
+	v9fs_inode_cache = kmem_cache_create("v9fs_inode_cache",
+					  sizeof(struct v9fs_inode),
+					  0, (SLAB_RECLAIM_ACCOUNT|
+					      SLAB_MEM_SPREAD),
+					  v9fs_inode_init_once);
+	if (!v9fs_inode_cache)
+		return -ENOMEM;
+
+	return 0;
+}
+
+/**
+ * v9fs_destroy_inode_cache - destroy the cache of 9P inode
+ *
+ */
+static void v9fs_destroy_inode_cache(void)
+{
+	/*
+	 * Make sure all delayed rcu free inodes are flushed before we
+	 * destroy cache.
+	 */
+	rcu_barrier();
+	kmem_cache_destroy(v9fs_inode_cache);
+}
+
+static int v9fs_cache_register(void)
+{
+	int ret;
+	ret = v9fs_init_inode_cache();
+	if (ret < 0)
+		return ret;
+#ifdef CONFIG_9P_FSCACHE
+	ret = fscache_register_netfs(&v9fs_cache_netfs);
+	if (ret < 0)
+		v9fs_destroy_inode_cache();
+#endif
+	return ret;
+}
+
+static void v9fs_cache_unregister(void)
+{
+	v9fs_destroy_inode_cache();
+#ifdef CONFIG_9P_FSCACHE
+	fscache_unregister_netfs(&v9fs_cache_netfs);
+#endif
+}
+
+/**
+ * init_v9fs - Initialize module
  *
  */
 
 static int __init init_v9fs(void)
 {
-	printk(KERN_INFO "Installing v9fs 9p2000 file system support\n");
+	int err;
+	pr_info("Installing v9fs 9p2000 file system support\n");
 	/* TODO: Setup list of registered trasnport modules */
-	return register_filesystem(&v9fs_fs_type);
+
+	err = v9fs_cache_register();
+	if (err < 0) {
+		pr_err("Failed to register v9fs for caching\n");
+		return err;
+	}
+
+	err = v9fs_sysfs_init();
+	if (err < 0) {
+		pr_err("Failed to register with sysfs\n");
+		goto out_cache;
+	}
+	err = register_filesystem(&v9fs_fs_type);
+	if (err < 0) {
+		pr_err("Failed to register filesystem\n");
+		goto out_sysfs_cleanup;
+	}
+
+	return 0;
+
+out_sysfs_cleanup:
+	v9fs_sysfs_cleanup();
+
+out_cache:
+	v9fs_cache_unregister();
+
+	return err;
 }
 
 /**
- * v9fs_init - shutdown module
+ * exit_v9fs - shutdown module
  *
  */
 
 static void __exit exit_v9fs(void)
 {
+	v9fs_sysfs_cleanup();
+	v9fs_cache_unregister();
 	unregister_filesystem(&v9fs_fs_type);
 }
 
diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h
index a7d56719299..099c7712631 100644
--- a/fs/9p/v9fs.h
+++ b/fs/9p/v9fs.h
@@ -20,23 +20,37 @@
  *  Boston, MA  02111-1301  USA
  *
  */
+#ifndef FS_9P_V9FS_H
+#define FS_9P_V9FS_H
+
+#include <linux/backing-dev.h>
 
 /**
  * enum p9_session_flags - option flags for each 9P session
- * @V9FS_EXTENDED: whether or not to use 9P2000.u extensions
+ * @V9FS_PROTO_2000U: whether or not to use 9P2000.u extensions
+ * @V9FS_PROTO_2000L: whether or not to use 9P2000.l extensions
  * @V9FS_ACCESS_SINGLE: only the mounting user can access the hierarchy
  * @V9FS_ACCESS_USER: a new attach will be issued for every user (default)
+ * @V9FS_ACCESS_CLIENT: Just like user, but access check is performed on client.
  * @V9FS_ACCESS_ANY: use a single attach for all users
  * @V9FS_ACCESS_MASK: bit mask of different ACCESS options
+ * @V9FS_POSIX_ACL: POSIX ACLs are enforced
  *
  * Session flags reflect options selected by users at mount time
  */
+#define	V9FS_ACCESS_ANY (V9FS_ACCESS_SINGLE | \
+			 V9FS_ACCESS_USER |   \
+			 V9FS_ACCESS_CLIENT)
+#define V9FS_ACCESS_MASK V9FS_ACCESS_ANY
+#define V9FS_ACL_MASK V9FS_POSIX_ACL
+
 enum p9_session_flags {
-	V9FS_EXTENDED		= 0x01,
-	V9FS_ACCESS_SINGLE	= 0x02,
-	V9FS_ACCESS_USER	= 0x04,
-	V9FS_ACCESS_ANY		= 0x06,
-	V9FS_ACCESS_MASK	= 0x06,
+	V9FS_PROTO_2000U	= 0x01,
+	V9FS_PROTO_2000L	= 0x02,
+	V9FS_ACCESS_SINGLE	= 0x04,
+	V9FS_ACCESS_USER	= 0x08,
+	V9FS_ACCESS_CLIENT	= 0x10,
+	V9FS_POSIX_ACL		= 0x20
 };
 
 /* possible values of ->cache */
@@ -50,7 +64,9 @@ enum p9_session_flags {
 
 enum p9_cache_modes {
 	CACHE_NONE,
+	CACHE_MMAP,
 	CACHE_LOOSE,
+	CACHE_FSCACHE,
 };
 
 /**
@@ -60,6 +76,8 @@ enum p9_cache_modes {
  * @debug: debug level
  * @afid: authentication handle
  * @cache: cache mode of type &p9_cache_modes
+ * @cachetag: the tag of the cache associated with this session
+ * @fscache: session cookie associated with FS-Cache
  * @options: copy of options string given by user
  * @uname: string user name to mount hierarchy as
  * @aname: mount specifier for remote hierarchy
@@ -68,7 +86,7 @@ enum p9_cache_modes {
  * @dfltgid: default numeric groupid to mount hierarchy as
  * @uid: if %V9FS_ACCESS_SINGLE, the numeric uid which mounted the hierarchy
  * @clnt: reference to 9P network client instantiated for this session
- * @debugfs_dir: reference to debugfs_dir which can be used for add'l debug
+ * @slist: reference to list of registered 9p sessions
  *
  * This structure holds state for each session instance established during
  * a sys_mount() .
@@ -84,40 +102,127 @@ struct v9fs_session_info {
 	unsigned short debug;
 	unsigned int afid;
 	unsigned int cache;
+#ifdef CONFIG_9P_FSCACHE
+	char *cachetag;
+	struct fscache_cookie *fscache;
+#endif
 
-	char *options;		/* copy of mount options */
 	char *uname;		/* user name to mount as */
 	char *aname;		/* name of remote hierarchy being mounted */
 	unsigned int maxdata;	/* max data for client interface */
-	unsigned int dfltuid;	/* default uid/muid for legacy support */
-	unsigned int dfltgid;	/* default gid for legacy support */
-	u32 uid;		/* if ACCESS_SINGLE, the uid that has access */
+	kuid_t dfltuid;		/* default uid/muid for legacy support */
+	kgid_t dfltgid;		/* default gid for legacy support */
+	kuid_t uid;		/* if ACCESS_SINGLE, the uid that has access */
 	struct p9_client *clnt;	/* 9p client */
-	struct dentry *debugfs_dir;
+	struct list_head slist; /* list of sessions registered with v9fs */
+	struct backing_dev_info bdi;
+	struct rw_semaphore rename_sem;
 };
 
-extern struct dentry *v9fs_debugfs_root;
+/* cache_validity flags */
+#define V9FS_INO_INVALID_ATTR 0x01
+
+struct v9fs_inode {
+#ifdef CONFIG_9P_FSCACHE
+	spinlock_t fscache_lock;
+	struct fscache_cookie *fscache;
+#endif
+	struct p9_qid qid;
+	unsigned int cache_validity;
+	struct p9_fid *writeback_fid;
+	struct mutex v_mutex;
+	struct inode vfs_inode;
+};
+
+static inline struct v9fs_inode *V9FS_I(const struct inode *inode)
+{
+	return container_of(inode, struct v9fs_inode, vfs_inode);
+}
 
 struct p9_fid *v9fs_session_init(struct v9fs_session_info *, const char *,
 									char *);
-void v9fs_session_close(struct v9fs_session_info *v9ses);
-void v9fs_session_cancel(struct v9fs_session_info *v9ses);
-
-#define V9FS_MAGIC 0x01021997
+extern void v9fs_session_close(struct v9fs_session_info *v9ses);
+extern void v9fs_session_cancel(struct v9fs_session_info *v9ses);
+extern void v9fs_session_begin_cancel(struct v9fs_session_info *v9ses);
+extern struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
+			unsigned int flags);
+extern int v9fs_vfs_unlink(struct inode *i, struct dentry *d);
+extern int v9fs_vfs_rmdir(struct inode *i, struct dentry *d);
+extern int v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
+			struct inode *new_dir, struct dentry *new_dentry);
+extern void v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd,
+			void *p);
+extern struct inode *v9fs_inode_from_fid(struct v9fs_session_info *v9ses,
+					 struct p9_fid *fid,
+					 struct super_block *sb, int new);
+extern const struct inode_operations v9fs_dir_inode_operations_dotl;
+extern const struct inode_operations v9fs_file_inode_operations_dotl;
+extern const struct inode_operations v9fs_symlink_inode_operations_dotl;
+extern struct inode *v9fs_inode_from_fid_dotl(struct v9fs_session_info *v9ses,
+					      struct p9_fid *fid,
+					      struct super_block *sb, int new);
 
 /* other default globals */
 #define V9FS_PORT	564
 #define V9FS_DEFUSER	"nobody"
 #define V9FS_DEFANAME	""
-#define V9FS_DEFUID	(-2)
-#define V9FS_DEFGID	(-2)
+#define V9FS_DEFUID	KUIDT_INIT(-2)
+#define V9FS_DEFGID	KGIDT_INIT(-2)
 
 static inline struct v9fs_session_info *v9fs_inode2v9ses(struct inode *inode)
 {
 	return (inode->i_sb->s_fs_info);
 }
 
-static inline int v9fs_extended(struct v9fs_session_info *v9ses)
+static inline struct v9fs_session_info *v9fs_dentry2v9ses(struct dentry *dentry)
+{
+	return dentry->d_sb->s_fs_info;
+}
+
+static inline int v9fs_proto_dotu(struct v9fs_session_info *v9ses)
+{
+	return v9ses->flags & V9FS_PROTO_2000U;
+}
+
+static inline int v9fs_proto_dotl(struct v9fs_session_info *v9ses)
 {
-	return v9ses->flags & V9FS_EXTENDED;
+	return v9ses->flags & V9FS_PROTO_2000L;
 }
+
+/**
+ * v9fs_get_inode_from_fid - Helper routine to populate an inode by
+ * issuing a attribute request
+ * @v9ses: session information
+ * @fid: fid to issue attribute request for
+ * @sb: superblock on which to create inode
+ *
+ */
+static inline struct inode *
+v9fs_get_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
+			struct super_block *sb)
+{
+	if (v9fs_proto_dotl(v9ses))
+		return v9fs_inode_from_fid_dotl(v9ses, fid, sb, 0);
+	else
+		return v9fs_inode_from_fid(v9ses, fid, sb, 0);
+}
+
+/**
+ * v9fs_get_new_inode_from_fid - Helper routine to populate an inode by
+ * issuing a attribute request
+ * @v9ses: session information
+ * @fid: fid to issue attribute request for
+ * @sb: superblock on which to create inode
+ *
+ */
+static inline struct inode *
+v9fs_get_new_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
+			    struct super_block *sb)
+{
+	if (v9fs_proto_dotl(v9ses))
+		return v9fs_inode_from_fid_dotl(v9ses, fid, sb, 1);
+	else
+		return v9fs_inode_from_fid(v9ses, fid, sb, 1);
+}
+
+#endif
diff --git a/fs/9p/v9fs_vfs.h b/fs/9p/v9fs_vfs.h
index f0c7de78e20..b83ebfbf3fd 100644
--- a/fs/9p/v9fs_vfs.h
+++ b/fs/9p/v9fs_vfs.h
@@ -20,6 +20,8 @@
  *  Boston, MA  02111-1301  USA
  *
  */
+#ifndef FS_9P_V9FS_VFS_H
+#define FS_9P_V9FS_VFS_H
 
 /* plan9 semantics are that created files are implicitly opened.
  * But linux semantics are that you call create, then open.
@@ -36,21 +38,53 @@
  * unlink calls remove, which is an implicit clunk. So we have to track
  * that kind of thing so that we don't try to clunk a dead fid.
  */
+#define P9_LOCK_TIMEOUT (30*HZ)
 
 extern struct file_system_type v9fs_fs_type;
 extern const struct address_space_operations v9fs_addr_operations;
 extern const struct file_operations v9fs_file_operations;
+extern const struct file_operations v9fs_file_operations_dotl;
 extern const struct file_operations v9fs_dir_operations;
+extern const struct file_operations v9fs_dir_operations_dotl;
 extern const struct dentry_operations v9fs_dentry_operations;
 extern const struct dentry_operations v9fs_cached_dentry_operations;
+extern const struct file_operations v9fs_cached_file_operations;
+extern const struct file_operations v9fs_cached_file_operations_dotl;
+extern const struct file_operations v9fs_mmap_file_operations;
+extern const struct file_operations v9fs_mmap_file_operations_dotl;
+extern struct kmem_cache *v9fs_inode_cache;
 
-struct inode *v9fs_get_inode(struct super_block *sb, int mode);
+struct inode *v9fs_alloc_inode(struct super_block *sb);
+void v9fs_destroy_inode(struct inode *inode);
+struct inode *v9fs_get_inode(struct super_block *sb, umode_t mode, dev_t);
+int v9fs_init_inode(struct v9fs_session_info *v9ses,
+		    struct inode *inode, umode_t mode, dev_t);
+void v9fs_evict_inode(struct inode *inode);
 ino_t v9fs_qid2ino(struct p9_qid *qid);
 void v9fs_stat2inode(struct p9_wstat *, struct inode *, struct super_block *);
+void v9fs_stat2inode_dotl(struct p9_stat_dotl *, struct inode *);
 int v9fs_dir_release(struct inode *inode, struct file *filp);
 int v9fs_file_open(struct inode *inode, struct file *file);
 void v9fs_inode2stat(struct inode *inode, struct p9_wstat *stat);
-void v9fs_dentry_release(struct dentry *);
 int v9fs_uflags2omode(int uflags, int extended);
 
 ssize_t v9fs_file_readn(struct file *, char *, char __user *, u32, u64);
+ssize_t v9fs_fid_readn(struct p9_fid *, char *, char __user *, u32, u64);
+void v9fs_blank_wstat(struct p9_wstat *wstat);
+int v9fs_vfs_setattr_dotl(struct dentry *, struct iattr *);
+int v9fs_file_fsync_dotl(struct file *filp, loff_t start, loff_t end,
+			 int datasync);
+ssize_t v9fs_file_write_internal(struct inode *, struct p9_fid *,
+				 const char __user *, size_t, loff_t *, int);
+int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode);
+int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode);
+static inline void v9fs_invalidate_inode_attr(struct inode *inode)
+{
+	struct v9fs_inode *v9inode;
+	v9inode = V9FS_I(inode);
+	v9inode->cache_validity |= V9FS_INO_INVALID_ATTR;
+	return;
+}
+
+int v9fs_open_to_dotl_flags(int flags);
+#endif
diff --git a/fs/9p/vfs_addr.c b/fs/9p/vfs_addr.c
index 6fcb1e7095c..cc1cfae726b 100644
--- a/fs/9p/vfs_addr.c
+++ b/fs/9p/vfs_addr.c
@@ -33,37 +33,52 @@
 #include <linux/pagemap.h>
 #include <linux/idr.h>
 #include <linux/sched.h>
+#include <linux/aio.h>
 #include <net/9p/9p.h>
 #include <net/9p/client.h>
 
 #include "v9fs.h"
 #include "v9fs_vfs.h"
+#include "cache.h"
+#include "fid.h"
 
 /**
- * v9fs_vfs_readpage - read an entire page in from 9P
+ * v9fs_fid_readpage - read an entire page in from 9P
  *
- * @filp: file being read
+ * @fid: fid being read
  * @page: structure to page
  *
  */
-
-static int v9fs_vfs_readpage(struct file *filp, struct page *page)
+static int v9fs_fid_readpage(struct p9_fid *fid, struct page *page)
 {
 	int retval;
 	loff_t offset;
 	char *buffer;
+	struct inode *inode;
+
+	inode = page->mapping->host;
+	p9_debug(P9_DEBUG_VFS, "\n");
+
+	BUG_ON(!PageLocked(page));
+
+	retval = v9fs_readpage_from_fscache(inode, page);
+	if (retval == 0)
+		return retval;
 
-	P9_DPRINTK(P9_DEBUG_VFS, "\n");
 	buffer = kmap(page);
 	offset = page_offset(page);
 
-	retval = v9fs_file_readn(filp, buffer, NULL, offset, PAGE_CACHE_SIZE);
-	if (retval < 0)
+	retval = v9fs_fid_readn(fid, buffer, NULL, PAGE_CACHE_SIZE, offset);
+	if (retval < 0) {
+		v9fs_uncache_page(inode, page);
 		goto done;
+	}
 
 	memset(buffer + retval, 0, PAGE_CACHE_SIZE - retval);
 	flush_dcache_page(page);
 	SetPageUptodate(page);
+
+	v9fs_readpage_to_fscache(inode, page);
 	retval = 0;
 
 done:
@@ -72,6 +87,274 @@ done:
 	return retval;
 }
 
+/**
+ * v9fs_vfs_readpage - read an entire page in from 9P
+ *
+ * @filp: file being read
+ * @page: structure to page
+ *
+ */
+
+static int v9fs_vfs_readpage(struct file *filp, struct page *page)
+{
+	return v9fs_fid_readpage(filp->private_data, page);
+}
+
+/**
+ * v9fs_vfs_readpages - read a set of pages from 9P
+ *
+ * @filp: file being read
+ * @mapping: the address space
+ * @pages: list of pages to read
+ * @nr_pages: count of pages to read
+ *
+ */
+
+static int v9fs_vfs_readpages(struct file *filp, struct address_space *mapping,
+			     struct list_head *pages, unsigned nr_pages)
+{
+	int ret = 0;
+	struct inode *inode;
+
+	inode = mapping->host;
+	p9_debug(P9_DEBUG_VFS, "inode: %p file: %p\n", inode, filp);
+
+	ret = v9fs_readpages_from_fscache(inode, mapping, pages, &nr_pages);
+	if (ret == 0)
+		return ret;
+
+	ret = read_cache_pages(mapping, pages, (void *)v9fs_vfs_readpage, filp);
+	p9_debug(P9_DEBUG_VFS, "  = %d\n", ret);
+	return ret;
+}
+
+/**
+ * v9fs_release_page - release the private state associated with a page
+ *
+ * Returns 1 if the page can be released, false otherwise.
+ */
+
+static int v9fs_release_page(struct page *page, gfp_t gfp)
+{
+	if (PagePrivate(page))
+		return 0;
+	return v9fs_fscache_release_page(page, gfp);
+}
+
+/**
+ * v9fs_invalidate_page - Invalidate a page completely or partially
+ *
+ * @page: structure to page
+ * @offset: offset in the page
+ */
+
+static void v9fs_invalidate_page(struct page *page, unsigned int offset,
+				 unsigned int length)
+{
+	/*
+	 * If called with zero offset, we should release
+	 * the private state assocated with the page
+	 */
+	if (offset == 0 && length == PAGE_CACHE_SIZE)
+		v9fs_fscache_invalidate_page(page);
+}
+
+static int v9fs_vfs_writepage_locked(struct page *page)
+{
+	char *buffer;
+	int retval, len;
+	loff_t offset, size;
+	mm_segment_t old_fs;
+	struct v9fs_inode *v9inode;
+	struct inode *inode = page->mapping->host;
+
+	v9inode = V9FS_I(inode);
+	size = i_size_read(inode);
+	if (page->index == size >> PAGE_CACHE_SHIFT)
+		len = size & ~PAGE_CACHE_MASK;
+	else
+		len = PAGE_CACHE_SIZE;
+
+	set_page_writeback(page);
+
+	buffer = kmap(page);
+	offset = page_offset(page);
+
+	old_fs = get_fs();
+	set_fs(get_ds());
+	/* We should have writeback_fid always set */
+	BUG_ON(!v9inode->writeback_fid);
+
+	retval = v9fs_file_write_internal(inode,
+					  v9inode->writeback_fid,
+					  (__force const char __user *)buffer,
+					  len, &offset, 0);
+	if (retval > 0)
+		retval = 0;
+
+	set_fs(old_fs);
+	kunmap(page);
+	end_page_writeback(page);
+	return retval;
+}
+
+static int v9fs_vfs_writepage(struct page *page, struct writeback_control *wbc)
+{
+	int retval;
+
+	p9_debug(P9_DEBUG_VFS, "page %p\n", page);
+
+	retval = v9fs_vfs_writepage_locked(page);
+	if (retval < 0) {
+		if (retval == -EAGAIN) {
+			redirty_page_for_writepage(wbc, page);
+			retval = 0;
+		} else {
+			SetPageError(page);
+			mapping_set_error(page->mapping, retval);
+		}
+	} else
+		retval = 0;
+
+	unlock_page(page);
+	return retval;
+}
+
+/**
+ * v9fs_launder_page - Writeback a dirty page
+ * Returns 0 on success.
+ */
+
+static int v9fs_launder_page(struct page *page)
+{
+	int retval;
+	struct inode *inode = page->mapping->host;
+
+	v9fs_fscache_wait_on_page_write(inode, page);
+	if (clear_page_dirty_for_io(page)) {
+		retval = v9fs_vfs_writepage_locked(page);
+		if (retval)
+			return retval;
+	}
+	return 0;
+}
+
+/**
+ * v9fs_direct_IO - 9P address space operation for direct I/O
+ * @rw: direction (read or write)
+ * @iocb: target I/O control block
+ * @iov: array of vectors that define I/O buffer
+ * @pos: offset in file to begin the operation
+ * @nr_segs: size of iovec array
+ *
+ * The presence of v9fs_direct_IO() in the address space ops vector
+ * allowes open() O_DIRECT flags which would have failed otherwise.
+ *
+ * In the non-cached mode, we shunt off direct read and write requests before
+ * the VFS gets them, so this method should never be called.
+ *
+ * Direct IO is not 'yet' supported in the cached mode. Hence when
+ * this routine is called through generic_file_aio_read(), the read/write fails
+ * with an error.
+ *
+ */
+static ssize_t
+v9fs_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter, loff_t pos)
+{
+	/*
+	 * FIXME
+	 * Now that we do caching with cache mode enabled, We need
+	 * to support direct IO
+	 */
+	p9_debug(P9_DEBUG_VFS, "v9fs_direct_IO: v9fs_direct_IO (%s) off/no(%lld/%lu) EINVAL\n",
+		 iocb->ki_filp->f_path.dentry->d_name.name,
+		 (long long)pos, iter->nr_segs);
+
+	return -EINVAL;
+}
+
+static int v9fs_write_begin(struct file *filp, struct address_space *mapping,
+			    loff_t pos, unsigned len, unsigned flags,
+			    struct page **pagep, void **fsdata)
+{
+	int retval = 0;
+	struct page *page;
+	struct v9fs_inode *v9inode;
+	pgoff_t index = pos >> PAGE_CACHE_SHIFT;
+	struct inode *inode = mapping->host;
+
+
+	p9_debug(P9_DEBUG_VFS, "filp %p, mapping %p\n", filp, mapping);
+
+	v9inode = V9FS_I(inode);
+start:
+	page = grab_cache_page_write_begin(mapping, index, flags);
+	if (!page) {
+		retval = -ENOMEM;
+		goto out;
+	}
+	BUG_ON(!v9inode->writeback_fid);
+	if (PageUptodate(page))
+		goto out;
+
+	if (len == PAGE_CACHE_SIZE)
+		goto out;
+
+	retval = v9fs_fid_readpage(v9inode->writeback_fid, page);
+	page_cache_release(page);
+	if (!retval)
+		goto start;
+out:
+	*pagep = page;
+	return retval;
+}
+
+static int v9fs_write_end(struct file *filp, struct address_space *mapping,
+			  loff_t pos, unsigned len, unsigned copied,
+			  struct page *page, void *fsdata)
+{
+	loff_t last_pos = pos + copied;
+	struct inode *inode = page->mapping->host;
+
+	p9_debug(P9_DEBUG_VFS, "filp %p, mapping %p\n", filp, mapping);
+
+	if (unlikely(copied < len)) {
+		/*
+		 * zero out the rest of the area
+		 */
+		unsigned from = pos & (PAGE_CACHE_SIZE - 1);
+
+		zero_user(page, from + copied, len - copied);
+		flush_dcache_page(page);
+	}
+
+	if (!PageUptodate(page))
+		SetPageUptodate(page);
+	/*
+	 * No need to use i_size_read() here, the i_size
+	 * cannot change under us because we hold the i_mutex.
+	 */
+	if (last_pos > inode->i_size) {
+		inode_add_bytes(inode, last_pos - inode->i_size);
+		i_size_write(inode, last_pos);
+	}
+	set_page_dirty(page);
+	unlock_page(page);
+	page_cache_release(page);
+
+	return copied;
+}
+
+
 const struct address_space_operations v9fs_addr_operations = {
-      .readpage = v9fs_vfs_readpage,
+	.readpage = v9fs_vfs_readpage,
+	.readpages = v9fs_vfs_readpages,
+	.set_page_dirty = __set_page_dirty_nobuffers,
+	.writepage = v9fs_vfs_writepage,
+	.write_begin = v9fs_write_begin,
+	.write_end = v9fs_write_end,
+	.releasepage = v9fs_release_page,
+	.invalidatepage = v9fs_invalidate_page,
+	.launder_page = v9fs_launder_page,
+	.direct_IO = v9fs_direct_IO,
 };
diff --git a/fs/9p/vfs_dentry.c b/fs/9p/vfs_dentry.c
index d74325295b1..b03dd23feda 100644
--- a/fs/9p/vfs_dentry.c
+++ b/fs/9p/vfs_dentry.c
@@ -34,6 +34,7 @@
 #include <linux/namei.h>
 #include <linux/idr.h>
 #include <linux/sched.h>
+#include <linux/slab.h>
 #include <net/9p/9p.h>
 #include <net/9p/client.h>
 
@@ -42,40 +43,18 @@
 #include "fid.h"
 
 /**
- * v9fs_dentry_delete - called when dentry refcount equals 0
- * @dentry:  dentry in question
- *
- * By returning 1 here we should remove cacheing of unused
- * dentry components.
- *
- */
-
-static int v9fs_dentry_delete(struct dentry *dentry)
-{
-	P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_name.name,
-									dentry);
-
-	return 1;
-}
-
-/**
  * v9fs_cached_dentry_delete - called when dentry refcount equals 0
  * @dentry:  dentry in question
  *
- * Only return 1 if our inode is invalid.  Only non-synthetic files
- * (ones without mtime == 0) should be calling this function.
- *
  */
-
-static int v9fs_cached_dentry_delete(struct dentry *dentry)
+static int v9fs_cached_dentry_delete(const struct dentry *dentry)
 {
-	struct inode *inode = dentry->d_inode;
-	P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_name.name,
-									dentry);
+	p9_debug(P9_DEBUG_VFS, " dentry: %s (%p)\n",
+		 dentry->d_name.name, dentry);
 
-	if(!inode)
+	/* Don't cache negative dentries */
+	if (!dentry->d_inode)
 		return 1;
-
 	return 0;
 }
 
@@ -85,31 +64,59 @@ static int v9fs_cached_dentry_delete(struct dentry *dentry)
  *
  */
 
-void v9fs_dentry_release(struct dentry *dentry)
+static void v9fs_dentry_release(struct dentry *dentry)
+{
+	struct hlist_node *p, *n;
+	p9_debug(P9_DEBUG_VFS, " dentry: %s (%p)\n",
+		 dentry->d_name.name, dentry);
+	hlist_for_each_safe(p, n, (struct hlist_head *)&dentry->d_fsdata)
+		p9_client_clunk(hlist_entry(p, struct p9_fid, dlist));
+	dentry->d_fsdata = NULL;
+}
+
+static int v9fs_lookup_revalidate(struct dentry *dentry, unsigned int flags)
 {
-	struct v9fs_dentry *dent;
-	struct p9_fid *temp, *current_fid;
+	struct p9_fid *fid;
+	struct inode *inode;
+	struct v9fs_inode *v9inode;
+
+	if (flags & LOOKUP_RCU)
+		return -ECHILD;
 
-	P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_name.name,
-									dentry);
-	dent = dentry->d_fsdata;
-	if (dent) {
-		list_for_each_entry_safe(current_fid, temp, &dent->fidlist,
-									dlist) {
-			p9_client_clunk(current_fid);
-		}
+	inode = dentry->d_inode;
+	if (!inode)
+		goto out_valid;
 
-		kfree(dent);
-		dentry->d_fsdata = NULL;
+	v9inode = V9FS_I(inode);
+	if (v9inode->cache_validity & V9FS_INO_INVALID_ATTR) {
+		int retval;
+		struct v9fs_session_info *v9ses;
+		fid = v9fs_fid_lookup(dentry);
+		if (IS_ERR(fid))
+			return PTR_ERR(fid);
+
+		v9ses = v9fs_inode2v9ses(inode);
+		if (v9fs_proto_dotl(v9ses))
+			retval = v9fs_refresh_inode_dotl(fid, inode);
+		else
+			retval = v9fs_refresh_inode(fid, inode);
+		if (retval == -ENOENT)
+			return 0;
+		if (retval < 0)
+			return retval;
 	}
+out_valid:
+	return 1;
 }
 
 const struct dentry_operations v9fs_cached_dentry_operations = {
+	.d_revalidate = v9fs_lookup_revalidate,
+	.d_weak_revalidate = v9fs_lookup_revalidate,
 	.d_delete = v9fs_cached_dentry_delete,
 	.d_release = v9fs_dentry_release,
 };
 
 const struct dentry_operations v9fs_dentry_operations = {
-	.d_delete = v9fs_dentry_delete,
+	.d_delete = always_delete_dentry,
 	.d_release = v9fs_dentry_release,
 };
diff --git a/fs/9p/vfs_dir.c b/fs/9p/vfs_dir.c
index 873cd31baa4..0b3bfa303dd 100644
--- a/fs/9p/vfs_dir.c
+++ b/fs/9p/vfs_dir.c
@@ -32,6 +32,7 @@
 #include <linux/sched.h>
 #include <linux/inet.h>
 #include <linux/idr.h>
+#include <linux/slab.h>
 #include <net/9p/9p.h>
 #include <net/9p/client.h>
 
@@ -40,6 +41,22 @@
 #include "fid.h"
 
 /**
+ * struct p9_rdir - readdir accounting
+ * @head: start offset of current dirread buffer
+ * @tail: end offset of current dirread buffer
+ * @buf: dirread buffer
+ *
+ * private structure for keeping track of readdir
+ * allocated on demand
+ */
+
+struct p9_rdir {
+	int head;
+	int tail;
+	uint8_t buf[];
+};
+
+/**
  * dt_type - return file type
  * @mistat: mistat structure
  *
@@ -58,69 +75,143 @@ static inline int dt_type(struct p9_wstat *mistat)
 	return rettype;
 }
 
+static void p9stat_init(struct p9_wstat *stbuf)
+{
+	stbuf->name  = NULL;
+	stbuf->uid   = NULL;
+	stbuf->gid   = NULL;
+	stbuf->muid  = NULL;
+	stbuf->extension = NULL;
+}
+
 /**
- * v9fs_dir_readdir - read a directory
+ * v9fs_alloc_rdir_buf - Allocate buffer used for read and readdir
  * @filp: opened file structure
- * @dirent: directory structure ???
- * @filldir: function to populate directory structure ???
+ * @buflen: Length in bytes of buffer to allocate
  *
  */
 
-static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir)
+static struct p9_rdir *v9fs_alloc_rdir_buf(struct file *filp, int buflen)
 {
-	int over;
+	struct p9_fid *fid = filp->private_data;
+	if (!fid->rdir)
+		fid->rdir = kzalloc(sizeof(struct p9_rdir) + buflen, GFP_KERNEL);
+	return fid->rdir;
+}
+
+/**
+ * v9fs_dir_readdir - iterate through a directory
+ * @file: opened file structure
+ * @ctx: actor we feed the entries to
+ *
+ */
+
+static int v9fs_dir_readdir(struct file *file, struct dir_context *ctx)
+{
+	bool over;
 	struct p9_wstat st;
-	int err;
+	int err = 0;
 	struct p9_fid *fid;
 	int buflen;
-	char *statbuf;
-	int n, i = 0;
+	int reclen = 0;
+	struct p9_rdir *rdir;
 
-	P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", filp->f_path.dentry->d_name.name);
-	fid = filp->private_data;
+	p9_debug(P9_DEBUG_VFS, "name %s\n", file->f_path.dentry->d_name.name);
+	fid = file->private_data;
 
 	buflen = fid->clnt->msize - P9_IOHDRSZ;
-	statbuf = kmalloc(buflen, GFP_KERNEL);
-	if (!statbuf)
+
+	rdir = v9fs_alloc_rdir_buf(file, buflen);
+	if (!rdir)
 		return -ENOMEM;
 
 	while (1) {
-		err = v9fs_file_readn(filp, statbuf, NULL, buflen,
-								fid->rdir_fpos);
-		if (err <= 0)
-			break;
-
-		n = err;
-		while (i < n) {
-			err = p9stat_read(statbuf + i, buflen-i, &st,
-							fid->clnt->dotu);
+		if (rdir->tail == rdir->head) {
+			err = v9fs_file_readn(file, rdir->buf, NULL,
+							buflen, ctx->pos);
+			if (err <= 0)
+				return err;
+
+			rdir->head = 0;
+			rdir->tail = err;
+		}
+		while (rdir->head < rdir->tail) {
+			p9stat_init(&st);
+			err = p9stat_read(fid->clnt, rdir->buf + rdir->head,
+					  rdir->tail - rdir->head, &st);
 			if (err) {
-				P9_DPRINTK(P9_DEBUG_VFS, "returned %d\n", err);
-				err = -EIO;
+				p9_debug(P9_DEBUG_VFS, "returned %d\n", err);
 				p9stat_free(&st);
-				goto free_and_exit;
+				return -EIO;
 			}
+			reclen = st.size+2;
+
+			over = !dir_emit(ctx, st.name, strlen(st.name),
+					 v9fs_qid2ino(&st.qid), dt_type(&st));
+			p9stat_free(&st);
+			if (over)
+				return 0;
+
+			rdir->head += reclen;
+			ctx->pos += reclen;
+		}
+	}
+}
 
-			i += st.size+2;
-			fid->rdir_fpos += st.size+2;
+/**
+ * v9fs_dir_readdir_dotl - iterate through a directory
+ * @file: opened file structure
+ * @ctx: actor we feed the entries to
+ *
+ */
+static int v9fs_dir_readdir_dotl(struct file *file, struct dir_context *ctx)
+{
+	int err = 0;
+	struct p9_fid *fid;
+	int buflen;
+	struct p9_rdir *rdir;
+	struct p9_dirent curdirent;
 
-			over = filldir(dirent, st.name, strlen(st.name),
-			    filp->f_pos, v9fs_qid2ino(&st.qid), dt_type(&st));
+	p9_debug(P9_DEBUG_VFS, "name %s\n", file->f_path.dentry->d_name.name);
+	fid = file->private_data;
 
-			filp->f_pos += st.size+2;
+	buflen = fid->clnt->msize - P9_READDIRHDRSZ;
 
-			p9stat_free(&st);
+	rdir = v9fs_alloc_rdir_buf(file, buflen);
+	if (!rdir)
+		return -ENOMEM;
 
-			if (over) {
-				err = 0;
-				goto free_and_exit;
+	while (1) {
+		if (rdir->tail == rdir->head) {
+			err = p9_client_readdir(fid, rdir->buf, buflen,
+						ctx->pos);
+			if (err <= 0)
+				return err;
+
+			rdir->head = 0;
+			rdir->tail = err;
+		}
+
+		while (rdir->head < rdir->tail) {
+
+			err = p9dirent_read(fid->clnt, rdir->buf + rdir->head,
+					    rdir->tail - rdir->head,
+					    &curdirent);
+			if (err < 0) {
+				p9_debug(P9_DEBUG_VFS, "returned %d\n", err);
+				return -EIO;
 			}
+
+			if (!dir_emit(ctx, curdirent.d_name,
+				      strlen(curdirent.d_name),
+				      v9fs_qid2ino(&curdirent.qid),
+				      curdirent.d_type))
+				return 0;
+
+			ctx->pos = curdirent.d_off;
+			rdir->head += err;
 		}
 	}
-
-free_and_exit:
-	kfree(statbuf);
-	return err;
 }
 
 
@@ -136,17 +227,26 @@ int v9fs_dir_release(struct inode *inode, struct file *filp)
 	struct p9_fid *fid;
 
 	fid = filp->private_data;
-	P9_DPRINTK(P9_DEBUG_VFS,
-			"inode: %p filp: %p fid: %d\n", inode, filp, fid->fid);
-	filemap_write_and_wait(inode->i_mapping);
-	p9_client_clunk(fid);
+	p9_debug(P9_DEBUG_VFS, "inode: %p filp: %p fid: %d\n",
+		 inode, filp, fid ? fid->fid : -1);
+	if (fid)
+		p9_client_clunk(fid);
 	return 0;
 }
 
 const struct file_operations v9fs_dir_operations = {
 	.read = generic_read_dir,
 	.llseek = generic_file_llseek,
-	.readdir = v9fs_dir_readdir,
+	.iterate = v9fs_dir_readdir,
+	.open = v9fs_file_open,
+	.release = v9fs_dir_release,
+};
+
+const struct file_operations v9fs_dir_operations_dotl = {
+	.read = generic_read_dir,
+	.llseek = generic_file_llseek,
+	.iterate = v9fs_dir_readdir_dotl,
 	.open = v9fs_file_open,
 	.release = v9fs_dir_release,
+        .fsync = v9fs_file_fsync_dotl,
 };
diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index 68bf2af6c38..520c11c2dcc 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -32,6 +32,8 @@
 #include <linux/string.h>
 #include <linux/inet.h>
 #include <linux/list.h>
+#include <linux/pagemap.h>
+#include <linux/utsname.h>
 #include <asm/uaccess.h>
 #include <linux/idr.h>
 #include <net/9p/9p.h>
@@ -40,8 +42,10 @@
 #include "v9fs.h"
 #include "v9fs_vfs.h"
 #include "fid.h"
+#include "cache.h"
 
-static const struct file_operations v9fs_cached_file_operations;
+static const struct vm_operations_struct v9fs_file_vm_ops;
+static const struct vm_operations_struct v9fs_mmap_file_vm_ops;
 
 /**
  * v9fs_file_open - open a file (or directory)
@@ -53,13 +57,19 @@ static const struct file_operations v9fs_cached_file_operations;
 int v9fs_file_open(struct inode *inode, struct file *file)
 {
 	int err;
+	struct v9fs_inode *v9inode;
 	struct v9fs_session_info *v9ses;
 	struct p9_fid *fid;
 	int omode;
 
-	P9_DPRINTK(P9_DEBUG_VFS, "inode: %p file: %p \n", inode, file);
+	p9_debug(P9_DEBUG_VFS, "inode: %p file: %p\n", inode, file);
+	v9inode = V9FS_I(inode);
 	v9ses = v9fs_inode2v9ses(inode);
-	omode = v9fs_uflags2omode(file->f_flags, v9fs_extended(v9ses));
+	if (v9fs_proto_dotl(v9ses))
+		omode = v9fs_open_to_dotl_flags(file->f_flags);
+	else
+		omode = v9fs_uflags2omode(file->f_flags,
+					v9fs_proto_dotu(v9ses));
 	fid = file->private_data;
 	if (!fid) {
 		fid = v9fs_fid_clone(file->f_path.dentry);
@@ -71,23 +81,39 @@ int v9fs_file_open(struct inode *inode, struct file *file)
 			p9_client_clunk(fid);
 			return err;
 		}
-		if (omode & P9_OTRUNC) {
-			inode->i_size = 0;
-			inode->i_blocks = 0;
-		}
-		if ((file->f_flags & O_APPEND) && (!v9fs_extended(v9ses)))
+		if ((file->f_flags & O_APPEND) &&
+			(!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)))
 			generic_file_llseek(file, 0, SEEK_END);
 	}
 
 	file->private_data = fid;
-	if ((fid->qid.version) && (v9ses->cache)) {
-		P9_DPRINTK(P9_DEBUG_VFS, "cached");
-		/* enable cached file options */
-		if(file->f_op == &v9fs_file_operations)
-			file->f_op = &v9fs_cached_file_operations;
+	mutex_lock(&v9inode->v_mutex);
+	if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) &&
+	    !v9inode->writeback_fid &&
+	    ((file->f_flags & O_ACCMODE) != O_RDONLY)) {
+		/*
+		 * clone a fid and add it to writeback_fid
+		 * we do it during open time instead of
+		 * page dirty time via write_begin/page_mkwrite
+		 * because we want write after unlink usecase
+		 * to work.
+		 */
+		fid = v9fs_writeback_fid(file->f_path.dentry);
+		if (IS_ERR(fid)) {
+			err = PTR_ERR(fid);
+			mutex_unlock(&v9inode->v_mutex);
+			goto out_error;
+		}
+		v9inode->writeback_fid = (void *) fid;
 	}
-
+	mutex_unlock(&v9inode->v_mutex);
+	if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
+		v9fs_cache_inode_set_cookie(inode, file);
 	return 0;
+out_error:
+	p9_client_clunk(file->private_data);
+	file->private_data = NULL;
+	return err;
 }
 
 /**
@@ -103,12 +129,12 @@ int v9fs_file_open(struct inode *inode, struct file *file)
 static int v9fs_file_lock(struct file *filp, int cmd, struct file_lock *fl)
 {
 	int res = 0;
-	struct inode *inode = filp->f_path.dentry->d_inode;
+	struct inode *inode = file_inode(filp);
 
-	P9_DPRINTK(P9_DEBUG_VFS, "filp: %p lock: %p\n", filp, fl);
+	p9_debug(P9_DEBUG_VFS, "filp: %p lock: %p\n", filp, fl);
 
 	/* No mandatory locks */
-	if (__mandatory_lock(inode))
+	if (__mandatory_lock(inode) && fl->fl_type != F_UNLCK)
 		return -ENOLCK;
 
 	if ((IS_SETLK(cmd) || IS_SETLKW(cmd)) && fl->fl_type != F_UNLCK) {
@@ -119,28 +145,244 @@ static int v9fs_file_lock(struct file *filp, int cmd, struct file_lock *fl)
 	return res;
 }
 
+static int v9fs_file_do_lock(struct file *filp, int cmd, struct file_lock *fl)
+{
+	struct p9_flock flock;
+	struct p9_fid *fid;
+	uint8_t status;
+	int res = 0;
+	unsigned char fl_type;
+
+	fid = filp->private_data;
+	BUG_ON(fid == NULL);
+
+	if ((fl->fl_flags & FL_POSIX) != FL_POSIX)
+		BUG();
+
+	res = posix_lock_file_wait(filp, fl);
+	if (res < 0)
+		goto out;
+
+	/* convert posix lock to p9 tlock args */
+	memset(&flock, 0, sizeof(flock));
+	/* map the lock type */
+	switch (fl->fl_type) {
+	case F_RDLCK:
+		flock.type = P9_LOCK_TYPE_RDLCK;
+		break;
+	case F_WRLCK:
+		flock.type = P9_LOCK_TYPE_WRLCK;
+		break;
+	case F_UNLCK:
+		flock.type = P9_LOCK_TYPE_UNLCK;
+		break;
+	}
+	flock.start = fl->fl_start;
+	if (fl->fl_end == OFFSET_MAX)
+		flock.length = 0;
+	else
+		flock.length = fl->fl_end - fl->fl_start + 1;
+	flock.proc_id = fl->fl_pid;
+	flock.client_id = fid->clnt->name;
+	if (IS_SETLKW(cmd))
+		flock.flags = P9_LOCK_FLAGS_BLOCK;
+
+	/*
+	 * if its a blocked request and we get P9_LOCK_BLOCKED as the status
+	 * for lock request, keep on trying
+	 */
+	for (;;) {
+		res = p9_client_lock_dotl(fid, &flock, &status);
+		if (res < 0)
+			break;
+
+		if (status != P9_LOCK_BLOCKED)
+			break;
+		if (status == P9_LOCK_BLOCKED && !IS_SETLKW(cmd))
+			break;
+		if (schedule_timeout_interruptible(P9_LOCK_TIMEOUT) != 0)
+			break;
+	}
+
+	/* map 9p status to VFS status */
+	switch (status) {
+	case P9_LOCK_SUCCESS:
+		res = 0;
+		break;
+	case P9_LOCK_BLOCKED:
+		res = -EAGAIN;
+		break;
+	case P9_LOCK_ERROR:
+	case P9_LOCK_GRACE:
+		res = -ENOLCK;
+		break;
+	default:
+		BUG();
+	}
+
+	/*
+	 * incase server returned error for lock request, revert
+	 * it locally
+	 */
+	if (res < 0 && fl->fl_type != F_UNLCK) {
+		fl_type = fl->fl_type;
+		fl->fl_type = F_UNLCK;
+		res = posix_lock_file_wait(filp, fl);
+		fl->fl_type = fl_type;
+	}
+out:
+	return res;
+}
+
+static int v9fs_file_getlock(struct file *filp, struct file_lock *fl)
+{
+	struct p9_getlock glock;
+	struct p9_fid *fid;
+	int res = 0;
+
+	fid = filp->private_data;
+	BUG_ON(fid == NULL);
+
+	posix_test_lock(filp, fl);
+	/*
+	 * if we have a conflicting lock locally, no need to validate
+	 * with server
+	 */
+	if (fl->fl_type != F_UNLCK)
+		return res;
+
+	/* convert posix lock to p9 tgetlock args */
+	memset(&glock, 0, sizeof(glock));
+	glock.type  = P9_LOCK_TYPE_UNLCK;
+	glock.start = fl->fl_start;
+	if (fl->fl_end == OFFSET_MAX)
+		glock.length = 0;
+	else
+		glock.length = fl->fl_end - fl->fl_start + 1;
+	glock.proc_id = fl->fl_pid;
+	glock.client_id = fid->clnt->name;
+
+	res = p9_client_getlock_dotl(fid, &glock);
+	if (res < 0)
+		return res;
+	/* map 9p lock type to os lock type */
+	switch (glock.type) {
+	case P9_LOCK_TYPE_RDLCK:
+		fl->fl_type = F_RDLCK;
+		break;
+	case P9_LOCK_TYPE_WRLCK:
+		fl->fl_type = F_WRLCK;
+		break;
+	case P9_LOCK_TYPE_UNLCK:
+		fl->fl_type = F_UNLCK;
+		break;
+	}
+	if (glock.type != P9_LOCK_TYPE_UNLCK) {
+		fl->fl_start = glock.start;
+		if (glock.length == 0)
+			fl->fl_end = OFFSET_MAX;
+		else
+			fl->fl_end = glock.start + glock.length - 1;
+		fl->fl_pid = glock.proc_id;
+	}
+	return res;
+}
+
 /**
- * v9fs_file_readn - read from a file
- * @filp: file pointer to read
+ * v9fs_file_lock_dotl - lock a file (or directory)
+ * @filp: file to be locked
+ * @cmd: lock command
+ * @fl: file lock structure
+ *
+ */
+
+static int v9fs_file_lock_dotl(struct file *filp, int cmd, struct file_lock *fl)
+{
+	struct inode *inode = file_inode(filp);
+	int ret = -ENOLCK;
+
+	p9_debug(P9_DEBUG_VFS, "filp: %p cmd:%d lock: %p name: %s\n",
+		 filp, cmd, fl, filp->f_path.dentry->d_name.name);
+
+	/* No mandatory locks */
+	if (__mandatory_lock(inode) && fl->fl_type != F_UNLCK)
+		goto out_err;
+
+	if ((IS_SETLK(cmd) || IS_SETLKW(cmd)) && fl->fl_type != F_UNLCK) {
+		filemap_write_and_wait(inode->i_mapping);
+		invalidate_mapping_pages(&inode->i_data, 0, -1);
+	}
+
+	if (IS_SETLK(cmd) || IS_SETLKW(cmd))
+		ret = v9fs_file_do_lock(filp, cmd, fl);
+	else if (IS_GETLK(cmd))
+		ret = v9fs_file_getlock(filp, fl);
+	else
+		ret = -EINVAL;
+out_err:
+	return ret;
+}
+
+/**
+ * v9fs_file_flock_dotl - lock a file
+ * @filp: file to be locked
+ * @cmd: lock command
+ * @fl: file lock structure
+ *
+ */
+
+static int v9fs_file_flock_dotl(struct file *filp, int cmd,
+	struct file_lock *fl)
+{
+	struct inode *inode = file_inode(filp);
+	int ret = -ENOLCK;
+
+	p9_debug(P9_DEBUG_VFS, "filp: %p cmd:%d lock: %p name: %s\n",
+		 filp, cmd, fl, filp->f_path.dentry->d_name.name);
+
+	/* No mandatory locks */
+	if (__mandatory_lock(inode) && fl->fl_type != F_UNLCK)
+		goto out_err;
+
+	if (!(fl->fl_flags & FL_FLOCK))
+		goto out_err;
+
+	if ((IS_SETLK(cmd) || IS_SETLKW(cmd)) && fl->fl_type != F_UNLCK) {
+		filemap_write_and_wait(inode->i_mapping);
+		invalidate_mapping_pages(&inode->i_data, 0, -1);
+	}
+	/* Convert flock to posix lock */
+	fl->fl_flags |= FL_POSIX;
+	fl->fl_flags ^= FL_FLOCK;
+
+	if (IS_SETLK(cmd) | IS_SETLKW(cmd))
+		ret = v9fs_file_do_lock(filp, cmd, fl);
+	else
+		ret = -EINVAL;
+out_err:
+	return ret;
+}
+
+/**
+ * v9fs_fid_readn - read from a fid
+ * @fid: fid to read
  * @data: data buffer to read data into
  * @udata: user data buffer to read data into
  * @count: size of buffer
  * @offset: offset at which to read data
  *
  */
-
 ssize_t
-v9fs_file_readn(struct file *filp, char *data, char __user *udata, u32 count,
+v9fs_fid_readn(struct p9_fid *fid, char *data, char __user *udata, u32 count,
 	       u64 offset)
 {
-	int n, total;
-	struct p9_fid *fid = filp->private_data;
-
-	P9_DPRINTK(P9_DEBUG_VFS, "fid %d offset %llu count %d\n", fid->fid,
-					(long long unsigned) offset, count);
+	int n, total, size;
 
+	p9_debug(P9_DEBUG_VFS, "fid %d offset %llu count %d\n",
+		 fid->fid, (long long unsigned)offset, count);
 	n = 0;
 	total = 0;
+	size = fid->iounit ? fid->iounit : fid->clnt->msize - P9_IOHDRSZ;
 	do {
 		n = p9_client_read(fid, data, udata, offset, count);
 		if (n <= 0)
@@ -154,7 +396,7 @@ v9fs_file_readn(struct file *filp, char *data, char __user *udata, u32 count,
 		offset += n;
 		count -= n;
 		total += n;
-	} while (count > 0 && n == (fid->clnt->msize - P9_IOHDRSZ));
+	} while (count > 0 && n == size);
 
 	if (n < 0)
 		total = n;
@@ -163,6 +405,22 @@ v9fs_file_readn(struct file *filp, char *data, char __user *udata, u32 count,
 }
 
 /**
+ * v9fs_file_readn - read from a file
+ * @filp: file pointer to read
+ * @data: data buffer to read data into
+ * @udata: user data buffer to read data into
+ * @count: size of buffer
+ * @offset: offset at which to read data
+ *
+ */
+ssize_t
+v9fs_file_readn(struct file *filp, char *data, char __user *udata, u32 count,
+	       u64 offset)
+{
+	return v9fs_fid_readn(filp->private_data, data, udata, count, offset);
+}
+
+/**
  * v9fs_file_read - read from a file
  * @filp: file pointer to read
  * @udata: user data buffer to read data into
@@ -177,11 +435,13 @@ v9fs_file_read(struct file *filp, char __user *udata, size_t count,
 {
 	int ret;
 	struct p9_fid *fid;
+	size_t size;
 
-	P9_DPRINTK(P9_DEBUG_VFS, "count %zu offset %lld\n", count, *offset);
+	p9_debug(P9_DEBUG_VFS, "count %zu offset %lld\n", count, *offset);
 	fid = filp->private_data;
 
-	if (count > (fid->clnt->msize - P9_IOHDRSZ))
+	size = fid->iounit ? fid->iounit : fid->clnt->msize - P9_IOHDRSZ;
+	if (count > size)
 		ret = v9fs_file_readn(filp, NULL, udata, count, *offset);
 	else
 		ret = p9_client_read(fid, NULL, udata, *offset, count);
@@ -192,6 +452,47 @@ v9fs_file_read(struct file *filp, char __user *udata, size_t count,
 	return ret;
 }
 
+ssize_t
+v9fs_file_write_internal(struct inode *inode, struct p9_fid *fid,
+			 const char __user *data, size_t count,
+			 loff_t *offset, int invalidate)
+{
+	int n;
+	loff_t i_size;
+	size_t total = 0;
+	loff_t origin = *offset;
+	unsigned long pg_start, pg_end;
+
+	p9_debug(P9_DEBUG_VFS, "data %p count %d offset %x\n",
+		 data, (int)count, (int)*offset);
+
+	do {
+		n = p9_client_write(fid, NULL, data+total, origin+total, count);
+		if (n <= 0)
+			break;
+		count -= n;
+		total += n;
+	} while (count > 0);
+
+	if (invalidate && (total > 0)) {
+		pg_start = origin >> PAGE_CACHE_SHIFT;
+		pg_end = (origin + total - 1) >> PAGE_CACHE_SHIFT;
+		if (inode->i_mapping && inode->i_mapping->nrpages)
+			invalidate_inode_pages2_range(inode->i_mapping,
+						      pg_start, pg_end);
+		*offset += total;
+		i_size = i_size_read(inode);
+		if (*offset > i_size) {
+			inode_add_bytes(inode, *offset - i_size);
+			i_size_write(inode, *offset);
+		}
+	}
+	if (n < 0)
+		return n;
+
+	return total;
+}
+
 /**
  * v9fs_file_write - write to a file
  * @filp: file pointer to write
@@ -200,65 +501,373 @@ v9fs_file_read(struct file *filp, char __user *udata, size_t count,
  * @offset: offset at which to write data
  *
  */
-
 static ssize_t
 v9fs_file_write(struct file *filp, const char __user * data,
-		size_t count, loff_t * offset)
+		size_t count, loff_t *offset)
+{
+	ssize_t retval = 0;
+	loff_t origin = *offset;
+
+
+	retval = generic_write_checks(filp, &origin, &count, 0);
+	if (retval)
+		goto out;
+
+	retval = -EINVAL;
+	if ((ssize_t) count < 0)
+		goto out;
+	retval = 0;
+	if (!count)
+		goto out;
+
+	retval = v9fs_file_write_internal(file_inode(filp),
+					filp->private_data,
+					data, count, &origin, 1);
+	/* update offset on successful write */
+	if (retval > 0)
+		*offset = origin;
+out:
+	return retval;
+}
+
+
+static int v9fs_file_fsync(struct file *filp, loff_t start, loff_t end,
+			   int datasync)
 {
-	int n, rsize, total = 0;
 	struct p9_fid *fid;
-	struct p9_client *clnt;
-	struct inode *inode = filp->f_path.dentry->d_inode;
-	int origin = *offset;
+	struct inode *inode = filp->f_mapping->host;
+	struct p9_wstat wstat;
+	int retval;
+
+	retval = filemap_write_and_wait_range(inode->i_mapping, start, end);
+	if (retval)
+		return retval;
 
-	P9_DPRINTK(P9_DEBUG_VFS, "data %p count %d offset %x\n", data,
-		(int)count, (int)*offset);
+	mutex_lock(&inode->i_mutex);
+	p9_debug(P9_DEBUG_VFS, "filp %p datasync %x\n", filp, datasync);
 
 	fid = filp->private_data;
-	clnt = fid->clnt;
+	v9fs_blank_wstat(&wstat);
 
-	rsize = fid->iounit;
-	if (!rsize || rsize > clnt->msize-P9_IOHDRSZ)
-		rsize = clnt->msize - P9_IOHDRSZ;
+	retval = p9_client_wstat(fid, &wstat);
+	mutex_unlock(&inode->i_mutex);
 
-	do {
-		if (count < rsize)
-			rsize = count;
+	return retval;
+}
 
-		n = p9_client_write(fid, NULL, data+total, *offset+total,
-									rsize);
-		if (n <= 0)
-			break;
-		count -= n;
-		total += n;
-	} while (count > 0);
+int v9fs_file_fsync_dotl(struct file *filp, loff_t start, loff_t end,
+			 int datasync)
+{
+	struct p9_fid *fid;
+	struct inode *inode = filp->f_mapping->host;
+	int retval;
 
-	if (total > 0) {
-		invalidate_inode_pages2_range(inode->i_mapping, origin,
-								origin+total);
-		*offset += total;
+	retval = filemap_write_and_wait_range(inode->i_mapping, start, end);
+	if (retval)
+		return retval;
+
+	mutex_lock(&inode->i_mutex);
+	p9_debug(P9_DEBUG_VFS, "filp %p datasync %x\n", filp, datasync);
+
+	fid = filp->private_data;
+
+	retval = p9_client_fsync(fid, datasync);
+	mutex_unlock(&inode->i_mutex);
+
+	return retval;
+}
+
+static int
+v9fs_file_mmap(struct file *filp, struct vm_area_struct *vma)
+{
+	int retval;
+
+
+	retval = generic_file_mmap(filp, vma);
+	if (!retval)
+		vma->vm_ops = &v9fs_file_vm_ops;
+
+	return retval;
+}
+
+static int
+v9fs_mmap_file_mmap(struct file *filp, struct vm_area_struct *vma)
+{
+	int retval;
+	struct inode *inode;
+	struct v9fs_inode *v9inode;
+	struct p9_fid *fid;
+
+	inode = file_inode(filp);
+	v9inode = V9FS_I(inode);
+	mutex_lock(&v9inode->v_mutex);
+	if (!v9inode->writeback_fid &&
+	    (vma->vm_flags & VM_WRITE)) {
+		/*
+		 * clone a fid and add it to writeback_fid
+		 * we do it during mmap instead of
+		 * page dirty time via write_begin/page_mkwrite
+		 * because we want write after unlink usecase
+		 * to work.
+		 */
+		fid = v9fs_writeback_fid(filp->f_path.dentry);
+		if (IS_ERR(fid)) {
+			retval = PTR_ERR(fid);
+			mutex_unlock(&v9inode->v_mutex);
+			return retval;
+		}
+		v9inode->writeback_fid = (void *) fid;
 	}
+	mutex_unlock(&v9inode->v_mutex);
+
+	retval = generic_file_mmap(filp, vma);
+	if (!retval)
+		vma->vm_ops = &v9fs_mmap_file_vm_ops;
+
+	return retval;
+}
+
+static int
+v9fs_vm_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
+{
+	struct v9fs_inode *v9inode;
+	struct page *page = vmf->page;
+	struct file *filp = vma->vm_file;
+	struct inode *inode = file_inode(filp);
+
+
+	p9_debug(P9_DEBUG_VFS, "page %p fid %lx\n",
+		 page, (unsigned long)filp->private_data);
+
+	/* Update file times before taking page lock */
+	file_update_time(filp);
+
+	v9inode = V9FS_I(inode);
+	/* make sure the cache has finished storing the page */
+	v9fs_fscache_wait_on_page_write(inode, page);
+	BUG_ON(!v9inode->writeback_fid);
+	lock_page(page);
+	if (page->mapping != inode->i_mapping)
+		goto out_unlock;
+	wait_for_stable_page(page);
+
+	return VM_FAULT_LOCKED;
+out_unlock:
+	unlock_page(page);
+	return VM_FAULT_NOPAGE;
+}
 
-	if (*offset > inode->i_size) {
-		inode->i_size = *offset;
-		inode->i_blocks = (inode->i_size + 512 - 1) >> 9;
+static ssize_t
+v9fs_direct_read(struct file *filp, char __user *udata, size_t count,
+		 loff_t *offsetp)
+{
+	loff_t size, offset;
+	struct inode *inode;
+	struct address_space *mapping;
+
+	offset = *offsetp;
+	mapping = filp->f_mapping;
+	inode = mapping->host;
+	if (!count)
+		return 0;
+	size = i_size_read(inode);
+	if (offset < size)
+		filemap_write_and_wait_range(mapping, offset,
+					     offset + count - 1);
+
+	return v9fs_file_read(filp, udata, count, offsetp);
+}
+
+/**
+ * v9fs_cached_file_read - read from a file
+ * @filp: file pointer to read
+ * @data: user data buffer to read data into
+ * @count: size of buffer
+ * @offset: offset at which to read data
+ *
+ */
+static ssize_t
+v9fs_cached_file_read(struct file *filp, char __user *data, size_t count,
+		      loff_t *offset)
+{
+	if (filp->f_flags & O_DIRECT)
+		return v9fs_direct_read(filp, data, count, offset);
+	return new_sync_read(filp, data, count, offset);
+}
+
+/**
+ * v9fs_mmap_file_read - read from a file
+ * @filp: file pointer to read
+ * @data: user data buffer to read data into
+ * @count: size of buffer
+ * @offset: offset at which to read data
+ *
+ */
+static ssize_t
+v9fs_mmap_file_read(struct file *filp, char __user *data, size_t count,
+		      loff_t *offset)
+{
+	/* TODO: Check if there are dirty pages */
+	return v9fs_file_read(filp, data, count, offset);
+}
+
+static ssize_t
+v9fs_direct_write(struct file *filp, const char __user * data,
+		  size_t count, loff_t *offsetp)
+{
+	loff_t offset;
+	ssize_t retval;
+	struct inode *inode;
+	struct address_space *mapping;
+
+	offset = *offsetp;
+	mapping = filp->f_mapping;
+	inode = mapping->host;
+	if (!count)
+		return 0;
+
+	mutex_lock(&inode->i_mutex);
+	retval = filemap_write_and_wait_range(mapping, offset,
+					      offset + count - 1);
+	if (retval)
+		goto err_out;
+	/*
+	 * After a write we want buffered reads to be sure to go to disk to get
+	 * the new data.  We invalidate clean cached page from the region we're
+	 * about to write.  We do this *before* the write so that if we fail
+	 * here we fall back to buffered write
+	 */
+	if (mapping->nrpages) {
+		pgoff_t pg_start = offset >> PAGE_CACHE_SHIFT;
+		pgoff_t pg_end   = (offset + count - 1) >> PAGE_CACHE_SHIFT;
+
+		retval = invalidate_inode_pages2_range(mapping,
+							pg_start, pg_end);
+		/*
+		 * If a page can not be invalidated, fall back
+		 * to buffered write.
+		 */
+		if (retval) {
+			if (retval == -EBUSY)
+				goto buff_write;
+			goto err_out;
+		}
 	}
+	retval = v9fs_file_write(filp, data, count, offsetp);
+err_out:
+	mutex_unlock(&inode->i_mutex);
+	return retval;
+
+buff_write:
+	mutex_unlock(&inode->i_mutex);
+	return new_sync_write(filp, data, count, offsetp);
+}
 
-	if (n < 0)
-		return n;
+/**
+ * v9fs_cached_file_write - write to a file
+ * @filp: file pointer to write
+ * @data: data buffer to write data from
+ * @count: size of buffer
+ * @offset: offset at which to write data
+ *
+ */
+static ssize_t
+v9fs_cached_file_write(struct file *filp, const char __user * data,
+		       size_t count, loff_t *offset)
+{
 
-	return total;
+	if (filp->f_flags & O_DIRECT)
+		return v9fs_direct_write(filp, data, count, offset);
+	return new_sync_write(filp, data, count, offset);
 }
 
-static const struct file_operations v9fs_cached_file_operations = {
+
+/**
+ * v9fs_mmap_file_write - write to a file
+ * @filp: file pointer to write
+ * @data: data buffer to write data from
+ * @count: size of buffer
+ * @offset: offset at which to write data
+ *
+ */
+static ssize_t
+v9fs_mmap_file_write(struct file *filp, const char __user *data,
+		       size_t count, loff_t *offset)
+{
+	/*
+	 * TODO: invalidate mmaps on filp's inode between
+	 * offset and offset+count
+	 */
+	return v9fs_file_write(filp, data, count, offset);
+}
+
+static void v9fs_mmap_vm_close(struct vm_area_struct *vma)
+{
+	struct inode *inode;
+
+	struct writeback_control wbc = {
+		.nr_to_write = LONG_MAX,
+		.sync_mode = WB_SYNC_ALL,
+		.range_start = vma->vm_pgoff * PAGE_SIZE,
+		 /* absolute end, byte at end included */
+		.range_end = vma->vm_pgoff * PAGE_SIZE +
+			(vma->vm_end - vma->vm_start - 1),
+	};
+
+
+	p9_debug(P9_DEBUG_VFS, "9p VMA close, %p, flushing", vma);
+
+	inode = file_inode(vma->vm_file);
+
+	if (!mapping_cap_writeback_dirty(inode->i_mapping))
+		wbc.nr_to_write = 0;
+
+	might_sleep();
+	sync_inode(inode, &wbc);
+}
+
+
+static const struct vm_operations_struct v9fs_file_vm_ops = {
+	.fault = filemap_fault,
+	.map_pages = filemap_map_pages,
+	.page_mkwrite = v9fs_vm_page_mkwrite,
+	.remap_pages = generic_file_remap_pages,
+};
+
+static const struct vm_operations_struct v9fs_mmap_file_vm_ops = {
+	.close = v9fs_mmap_vm_close,
+	.fault = filemap_fault,
+	.map_pages = filemap_map_pages,
+	.page_mkwrite = v9fs_vm_page_mkwrite,
+	.remap_pages = generic_file_remap_pages,
+};
+
+
+const struct file_operations v9fs_cached_file_operations = {
 	.llseek = generic_file_llseek,
-	.read = do_sync_read,
-	.aio_read = generic_file_aio_read,
-	.write = v9fs_file_write,
+	.read = v9fs_cached_file_read,
+	.write = v9fs_cached_file_write,
+	.read_iter = generic_file_read_iter,
+	.write_iter = generic_file_write_iter,
 	.open = v9fs_file_open,
 	.release = v9fs_dir_release,
 	.lock = v9fs_file_lock,
-	.mmap = generic_file_readonly_mmap,
+	.mmap = v9fs_file_mmap,
+	.fsync = v9fs_file_fsync,
+};
+
+const struct file_operations v9fs_cached_file_operations_dotl = {
+	.llseek = generic_file_llseek,
+	.read = v9fs_cached_file_read,
+	.write = v9fs_cached_file_write,
+	.read_iter = generic_file_read_iter,
+	.write_iter = generic_file_write_iter,
+	.open = v9fs_file_open,
+	.release = v9fs_dir_release,
+	.lock = v9fs_file_lock_dotl,
+	.flock = v9fs_file_flock_dotl,
+	.mmap = v9fs_file_mmap,
+	.fsync = v9fs_file_fsync_dotl,
 };
 
 const struct file_operations v9fs_file_operations = {
@@ -269,4 +878,40 @@ const struct file_operations v9fs_file_operations = {
 	.release = v9fs_dir_release,
 	.lock = v9fs_file_lock,
 	.mmap = generic_file_readonly_mmap,
+	.fsync = v9fs_file_fsync,
+};
+
+const struct file_operations v9fs_file_operations_dotl = {
+	.llseek = generic_file_llseek,
+	.read = v9fs_file_read,
+	.write = v9fs_file_write,
+	.open = v9fs_file_open,
+	.release = v9fs_dir_release,
+	.lock = v9fs_file_lock_dotl,
+	.flock = v9fs_file_flock_dotl,
+	.mmap = generic_file_readonly_mmap,
+	.fsync = v9fs_file_fsync_dotl,
+};
+
+const struct file_operations v9fs_mmap_file_operations = {
+	.llseek = generic_file_llseek,
+	.read = v9fs_mmap_file_read,
+	.write = v9fs_mmap_file_write,
+	.open = v9fs_file_open,
+	.release = v9fs_dir_release,
+	.lock = v9fs_file_lock,
+	.mmap = v9fs_mmap_file_mmap,
+	.fsync = v9fs_file_fsync,
+};
+
+const struct file_operations v9fs_mmap_file_operations_dotl = {
+	.llseek = generic_file_llseek,
+	.read = v9fs_mmap_file_read,
+	.write = v9fs_mmap_file_write,
+	.open = v9fs_file_open,
+	.release = v9fs_dir_release,
+	.lock = v9fs_file_lock_dotl,
+	.flock = v9fs_file_flock_dotl,
+	.mmap = v9fs_mmap_file_mmap,
+	.fsync = v9fs_file_fsync_dotl,
 };
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 81f8bbf12f9..7fa4f7a7653 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -23,6 +23,8 @@
  *
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/module.h>
 #include <linux/errno.h>
 #include <linux/fs.h>
@@ -34,15 +36,21 @@
 #include <linux/namei.h>
 #include <linux/idr.h>
 #include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/xattr.h>
+#include <linux/posix_acl.h>
 #include <net/9p/9p.h>
 #include <net/9p/client.h>
 
 #include "v9fs.h"
 #include "v9fs_vfs.h"
 #include "fid.h"
+#include "cache.h"
+#include "xattr.h"
+#include "acl.h"
 
 static const struct inode_operations v9fs_dir_inode_operations;
-static const struct inode_operations v9fs_dir_inode_operations_ext;
+static const struct inode_operations v9fs_dir_inode_operations_dotu;
 static const struct inode_operations v9fs_file_inode_operations;
 static const struct inode_operations v9fs_symlink_inode_operations;
 
@@ -53,15 +61,13 @@ static const struct inode_operations v9fs_symlink_inode_operations;
  *
  */
 
-static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode)
+static u32 unixmode2p9mode(struct v9fs_session_info *v9ses, umode_t mode)
 {
 	int res;
 	res = mode & 0777;
 	if (S_ISDIR(mode))
 		res |= P9_DMDIR;
-	if (v9fs_extended(v9ses)) {
-		if (S_ISLNK(mode))
-			res |= P9_DMSYMLINK;
+	if (v9fs_proto_dotu(v9ses)) {
 		if (v9ses->nodev == 0) {
 			if (S_ISSOCK(mode))
 				res |= P9_DMSOCKET;
@@ -79,52 +85,83 @@ static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode)
 			res |= P9_DMSETGID;
 		if ((mode & S_ISVTX) == S_ISVTX)
 			res |= P9_DMSETVTX;
-		if ((mode & P9_DMLINK))
-			res |= P9_DMLINK;
 	}
+	return res;
+}
+
+/**
+ * p9mode2perm- convert plan9 mode bits to unix permission bits
+ * @v9ses: v9fs session information
+ * @stat: p9_wstat from which mode need to be derived
+ *
+ */
+static int p9mode2perm(struct v9fs_session_info *v9ses,
+		       struct p9_wstat *stat)
+{
+	int res;
+	int mode = stat->mode;
+
+	res = mode & S_IALLUGO;
+	if (v9fs_proto_dotu(v9ses)) {
+		if ((mode & P9_DMSETUID) == P9_DMSETUID)
+			res |= S_ISUID;
+
+		if ((mode & P9_DMSETGID) == P9_DMSETGID)
+			res |= S_ISGID;
 
+		if ((mode & P9_DMSETVTX) == P9_DMSETVTX)
+			res |= S_ISVTX;
+	}
 	return res;
 }
 
 /**
  * p9mode2unixmode- convert plan9 mode bits to unix mode bits
  * @v9ses: v9fs session information
- * @mode: mode to convert
+ * @stat: p9_wstat from which mode need to be derived
+ * @rdev: major number, minor number in case of device files.
  *
  */
-
-static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode)
+static umode_t p9mode2unixmode(struct v9fs_session_info *v9ses,
+			       struct p9_wstat *stat, dev_t *rdev)
 {
 	int res;
+	u32 mode = stat->mode;
 
-	res = mode & 0777;
+	*rdev = 0;
+	res = p9mode2perm(v9ses, stat);
 
 	if ((mode & P9_DMDIR) == P9_DMDIR)
 		res |= S_IFDIR;
-	else if ((mode & P9_DMSYMLINK) && (v9fs_extended(v9ses)))
+	else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses)))
 		res |= S_IFLNK;
-	else if ((mode & P9_DMSOCKET) && (v9fs_extended(v9ses))
+	else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses))
 		 && (v9ses->nodev == 0))
 		res |= S_IFSOCK;
-	else if ((mode & P9_DMNAMEDPIPE) && (v9fs_extended(v9ses))
+	else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses))
 		 && (v9ses->nodev == 0))
 		res |= S_IFIFO;
-	else if ((mode & P9_DMDEVICE) && (v9fs_extended(v9ses))
-		 && (v9ses->nodev == 0))
-		res |= S_IFBLK;
-	else
-		res |= S_IFREG;
-
-	if (v9fs_extended(v9ses)) {
-		if ((mode & P9_DMSETUID) == P9_DMSETUID)
-			res |= S_ISUID;
+	else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses))
+		 && (v9ses->nodev == 0)) {
+		char type = 0, ext[32];
+		int major = -1, minor = -1;
 
-		if ((mode & P9_DMSETGID) == P9_DMSETGID)
-			res |= S_ISGID;
-
-		if ((mode & P9_DMSETVTX) == P9_DMSETVTX)
-			res |= S_ISVTX;
-	}
+		strlcpy(ext, stat->extension, sizeof(ext));
+		sscanf(ext, "%c %i %i", &type, &major, &minor);
+		switch (type) {
+		case 'c':
+			res |= S_IFCHR;
+			break;
+		case 'b':
+			res |= S_IFBLK;
+			break;
+		default:
+			p9_debug(P9_DEBUG_ERROR, "Unknown special type %c %s\n",
+				 type, stat->extension);
+		};
+		*rdev = MKDEV(major, minor);
+	} else
+		res |= S_IFREG;
 
 	return res;
 }
@@ -155,9 +192,6 @@ int v9fs_uflags2omode(int uflags, int extended)
 		break;
 	}
 
-	if (uflags & O_TRUNC)
-		ret |= P9_OTRUNC;
-
 	if (extended) {
 		if (uflags & O_EXCL)
 			ret |= P9_OEXCL;
@@ -171,12 +205,11 @@ int v9fs_uflags2omode(int uflags, int extended)
 
 /**
  * v9fs_blank_wstat - helper function to setup a 9P stat structure
- * @v9ses: 9P session info (for determining extended mode)
  * @wstat: structure to initialize
  *
  */
 
-static void
+void
 v9fs_blank_wstat(struct p9_wstat *wstat)
 {
 	wstat->type = ~0;
@@ -192,79 +225,167 @@ v9fs_blank_wstat(struct p9_wstat *wstat)
 	wstat->uid = NULL;
 	wstat->gid = NULL;
 	wstat->muid = NULL;
-	wstat->n_uid = ~0;
-	wstat->n_gid = ~0;
-	wstat->n_muid = ~0;
+	wstat->n_uid = INVALID_UID;
+	wstat->n_gid = INVALID_GID;
+	wstat->n_muid = INVALID_UID;
 	wstat->extension = NULL;
 }
 
 /**
+ * v9fs_alloc_inode - helper function to allocate an inode
+ *
+ */
+struct inode *v9fs_alloc_inode(struct super_block *sb)
+{
+	struct v9fs_inode *v9inode;
+	v9inode = (struct v9fs_inode *)kmem_cache_alloc(v9fs_inode_cache,
+							GFP_KERNEL);
+	if (!v9inode)
+		return NULL;
+#ifdef CONFIG_9P_FSCACHE
+	v9inode->fscache = NULL;
+	spin_lock_init(&v9inode->fscache_lock);
+#endif
+	v9inode->writeback_fid = NULL;
+	v9inode->cache_validity = 0;
+	mutex_init(&v9inode->v_mutex);
+	return &v9inode->vfs_inode;
+}
+
+/**
+ * v9fs_destroy_inode - destroy an inode
+ *
+ */
+
+static void v9fs_i_callback(struct rcu_head *head)
+{
+	struct inode *inode = container_of(head, struct inode, i_rcu);
+	kmem_cache_free(v9fs_inode_cache, V9FS_I(inode));
+}
+
+void v9fs_destroy_inode(struct inode *inode)
+{
+	call_rcu(&inode->i_rcu, v9fs_i_callback);
+}
+
+int v9fs_init_inode(struct v9fs_session_info *v9ses,
+		    struct inode *inode, umode_t mode, dev_t rdev)
+{
+	int err = 0;
+
+	inode_init_owner(inode, NULL, mode);
+	inode->i_blocks = 0;
+	inode->i_rdev = rdev;
+	inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+	inode->i_mapping->a_ops = &v9fs_addr_operations;
+
+	switch (mode & S_IFMT) {
+	case S_IFIFO:
+	case S_IFBLK:
+	case S_IFCHR:
+	case S_IFSOCK:
+		if (v9fs_proto_dotl(v9ses)) {
+			inode->i_op = &v9fs_file_inode_operations_dotl;
+		} else if (v9fs_proto_dotu(v9ses)) {
+			inode->i_op = &v9fs_file_inode_operations;
+		} else {
+			p9_debug(P9_DEBUG_ERROR,
+				 "special files without extended mode\n");
+			err = -EINVAL;
+			goto error;
+		}
+		init_special_inode(inode, inode->i_mode, inode->i_rdev);
+		break;
+	case S_IFREG:
+		if (v9fs_proto_dotl(v9ses)) {
+			inode->i_op = &v9fs_file_inode_operations_dotl;
+			if (v9ses->cache == CACHE_LOOSE ||
+			    v9ses->cache == CACHE_FSCACHE)
+				inode->i_fop =
+					&v9fs_cached_file_operations_dotl;
+			else if (v9ses->cache == CACHE_MMAP)
+				inode->i_fop = &v9fs_mmap_file_operations_dotl;
+			else
+				inode->i_fop = &v9fs_file_operations_dotl;
+		} else {
+			inode->i_op = &v9fs_file_inode_operations;
+			if (v9ses->cache == CACHE_LOOSE ||
+			    v9ses->cache == CACHE_FSCACHE)
+				inode->i_fop =
+					&v9fs_cached_file_operations;
+			else if (v9ses->cache == CACHE_MMAP)
+				inode->i_fop = &v9fs_mmap_file_operations;
+			else
+				inode->i_fop = &v9fs_file_operations;
+		}
+
+		break;
+	case S_IFLNK:
+		if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) {
+			p9_debug(P9_DEBUG_ERROR,
+				 "extended modes used with legacy protocol\n");
+			err = -EINVAL;
+			goto error;
+		}
+
+		if (v9fs_proto_dotl(v9ses))
+			inode->i_op = &v9fs_symlink_inode_operations_dotl;
+		else
+			inode->i_op = &v9fs_symlink_inode_operations;
+
+		break;
+	case S_IFDIR:
+		inc_nlink(inode);
+		if (v9fs_proto_dotl(v9ses))
+			inode->i_op = &v9fs_dir_inode_operations_dotl;
+		else if (v9fs_proto_dotu(v9ses))
+			inode->i_op = &v9fs_dir_inode_operations_dotu;
+		else
+			inode->i_op = &v9fs_dir_inode_operations;
+
+		if (v9fs_proto_dotl(v9ses))
+			inode->i_fop = &v9fs_dir_operations_dotl;
+		else
+			inode->i_fop = &v9fs_dir_operations;
+
+		break;
+	default:
+		p9_debug(P9_DEBUG_ERROR, "BAD mode 0x%hx S_IFMT 0x%x\n",
+			 mode, mode & S_IFMT);
+		err = -EINVAL;
+		goto error;
+	}
+error:
+	return err;
+
+}
+
+/**
  * v9fs_get_inode - helper function to setup an inode
  * @sb: superblock
  * @mode: mode to setup inode with
  *
  */
 
-struct inode *v9fs_get_inode(struct super_block *sb, int mode)
+struct inode *v9fs_get_inode(struct super_block *sb, umode_t mode, dev_t rdev)
 {
+	int err;
 	struct inode *inode;
 	struct v9fs_session_info *v9ses = sb->s_fs_info;
 
-	P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode);
+	p9_debug(P9_DEBUG_VFS, "super block: %p mode: %ho\n", sb, mode);
 
 	inode = new_inode(sb);
-	if (inode) {
-		inode->i_mode = mode;
-		inode->i_uid = current_fsuid();
-		inode->i_gid = current_fsgid();
-		inode->i_blocks = 0;
-		inode->i_rdev = 0;
-		inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
-		inode->i_mapping->a_ops = &v9fs_addr_operations;
-
-		switch (mode & S_IFMT) {
-		case S_IFIFO:
-		case S_IFBLK:
-		case S_IFCHR:
-		case S_IFSOCK:
-			if (!v9fs_extended(v9ses)) {
-				P9_DPRINTK(P9_DEBUG_ERROR,
-				      "special files without extended mode\n");
-				return ERR_PTR(-EINVAL);
-			}
-			init_special_inode(inode, inode->i_mode,
-					   inode->i_rdev);
-			break;
-		case S_IFREG:
-			inode->i_op = &v9fs_file_inode_operations;
-			inode->i_fop = &v9fs_file_operations;
-			break;
-		case S_IFLNK:
-			if (!v9fs_extended(v9ses)) {
-				P9_DPRINTK(P9_DEBUG_ERROR,
-					"extended modes used w/o 9P2000.u\n");
-				return ERR_PTR(-EINVAL);
-			}
-			inode->i_op = &v9fs_symlink_inode_operations;
-			break;
-		case S_IFDIR:
-			inc_nlink(inode);
-			if (v9fs_extended(v9ses))
-				inode->i_op = &v9fs_dir_inode_operations_ext;
-			else
-				inode->i_op = &v9fs_dir_inode_operations;
-			inode->i_fop = &v9fs_dir_operations;
-			break;
-		default:
-			P9_DPRINTK(P9_DEBUG_ERROR,
-				"BAD mode 0x%x S_IFMT 0x%x\n",
-				mode, mode & S_IFMT);
-			return ERR_PTR(-EINVAL);
-		}
-	} else {
-		P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n");
+	if (!inode) {
+		pr_warn("%s (%d): Problem allocating inode\n",
+			__func__, task_pid_nr(current));
 		return ERR_PTR(-ENOMEM);
 	}
+	err = v9fs_init_inode(v9ses, inode, mode, rdev);
+	if (err) {
+		iput(inode);
+		return ERR_PTR(err);
+	}
 	return inode;
 }
 
@@ -320,92 +441,202 @@ error:
 }
 */
 
+
 /**
- * v9fs_inode_from_fid - populate an inode by issuing a attribute request
- * @v9ses: session information
- * @fid: fid to issue attribute request for
- * @sb: superblock on which to create inode
+ * v9fs_clear_inode - release an inode
+ * @inode: inode to release
  *
  */
-
-static struct inode *
-v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
-	struct super_block *sb)
+void v9fs_evict_inode(struct inode *inode)
 {
-	int err, umode;
-	struct inode *ret;
-	struct p9_wstat *st;
+	struct v9fs_inode *v9inode = V9FS_I(inode);
 
-	ret = NULL;
-	st = p9_client_stat(fid);
-	if (IS_ERR(st)) {
-		err = PTR_ERR(st);
-		st = NULL;
-		goto error;
-	}
+	truncate_inode_pages_final(inode->i_mapping);
+	clear_inode(inode);
+	filemap_fdatawrite(inode->i_mapping);
 
-	umode = p9mode2unixmode(v9ses, st->mode);
-	ret = v9fs_get_inode(sb, umode);
-	if (IS_ERR(ret)) {
-		err = PTR_ERR(ret);
-		ret = NULL;
-		goto error;
+	v9fs_cache_inode_put_cookie(inode);
+	/* clunk the fid stashed in writeback_fid */
+	if (v9inode->writeback_fid) {
+		p9_client_clunk(v9inode->writeback_fid);
+		v9inode->writeback_fid = NULL;
 	}
+}
 
-	v9fs_stat2inode(st, ret, sb);
-	ret->i_ino = v9fs_qid2ino(&st->qid);
-	kfree(st);
-	return ret;
+static int v9fs_test_inode(struct inode *inode, void *data)
+{
+	int umode;
+	dev_t rdev;
+	struct v9fs_inode *v9inode = V9FS_I(inode);
+	struct p9_wstat *st = (struct p9_wstat *)data;
+	struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
+
+	umode = p9mode2unixmode(v9ses, st, &rdev);
+	/* don't match inode of different type */
+	if ((inode->i_mode & S_IFMT) != (umode & S_IFMT))
+		return 0;
+
+	/* compare qid details */
+	if (memcmp(&v9inode->qid.version,
+		   &st->qid.version, sizeof(v9inode->qid.version)))
+		return 0;
+
+	if (v9inode->qid.type != st->qid.type)
+		return 0;
+	return 1;
+}
+
+static int v9fs_test_new_inode(struct inode *inode, void *data)
+{
+	return 0;
+}
+
+static int v9fs_set_inode(struct inode *inode,  void *data)
+{
+	struct v9fs_inode *v9inode = V9FS_I(inode);
+	struct p9_wstat *st = (struct p9_wstat *)data;
 
+	memcpy(&v9inode->qid, &st->qid, sizeof(st->qid));
+	return 0;
+}
+
+static struct inode *v9fs_qid_iget(struct super_block *sb,
+				   struct p9_qid *qid,
+				   struct p9_wstat *st,
+				   int new)
+{
+	dev_t rdev;
+	int retval;
+	umode_t umode;
+	unsigned long i_ino;
+	struct inode *inode;
+	struct v9fs_session_info *v9ses = sb->s_fs_info;
+	int (*test)(struct inode *, void *);
+
+	if (new)
+		test = v9fs_test_new_inode;
+	else
+		test = v9fs_test_inode;
+
+	i_ino = v9fs_qid2ino(qid);
+	inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st);
+	if (!inode)
+		return ERR_PTR(-ENOMEM);
+	if (!(inode->i_state & I_NEW))
+		return inode;
+	/*
+	 * initialize the inode with the stat info
+	 * FIXME!! we may need support for stale inodes
+	 * later.
+	 */
+	inode->i_ino = i_ino;
+	umode = p9mode2unixmode(v9ses, st, &rdev);
+	retval = v9fs_init_inode(v9ses, inode, umode, rdev);
+	if (retval)
+		goto error;
+
+	v9fs_stat2inode(st, inode, sb);
+	v9fs_cache_inode_get_cookie(inode);
+	unlock_new_inode(inode);
+	return inode;
 error:
+	unlock_new_inode(inode);
+	iput(inode);
+	return ERR_PTR(retval);
+
+}
+
+struct inode *
+v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
+		    struct super_block *sb, int new)
+{
+	struct p9_wstat *st;
+	struct inode *inode = NULL;
+
+	st = p9_client_stat(fid);
+	if (IS_ERR(st))
+		return ERR_CAST(st);
+
+	inode = v9fs_qid_iget(sb, &st->qid, st, new);
+	p9stat_free(st);
 	kfree(st);
-	if (ret)
-		iput(ret);
+	return inode;
+}
 
-	return ERR_PTR(err);
+/**
+ * v9fs_at_to_dotl_flags- convert Linux specific AT flags to
+ * plan 9 AT flag.
+ * @flags: flags to convert
+ */
+static int v9fs_at_to_dotl_flags(int flags)
+{
+	int rflags = 0;
+	if (flags & AT_REMOVEDIR)
+		rflags |= P9_DOTL_AT_REMOVEDIR;
+	return rflags;
 }
 
 /**
  * v9fs_remove - helper function to remove files and directories
  * @dir: directory inode that is being deleted
- * @file:  dentry that is being deleted
- * @rmdir: removing a directory
+ * @dentry:  dentry that is being deleted
+ * @flags: removing a directory
  *
  */
 
-static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir)
+static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags)
 {
-	struct inode *file_inode;
+	struct inode *inode;
+	int retval = -EOPNOTSUPP;
+	struct p9_fid *v9fid, *dfid;
 	struct v9fs_session_info *v9ses;
-	struct p9_fid *v9fid;
 
-	P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file,
-		rmdir);
+	p9_debug(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n",
+		 dir, dentry, flags);
 
-	file_inode = file->d_inode;
-	v9ses = v9fs_inode2v9ses(file_inode);
-	v9fid = v9fs_fid_clone(file);
-	if (IS_ERR(v9fid))
-		return PTR_ERR(v9fid);
-
-	return p9_client_remove(v9fid);
-}
+	v9ses = v9fs_inode2v9ses(dir);
+	inode = dentry->d_inode;
+	dfid = v9fs_fid_lookup(dentry->d_parent);
+	if (IS_ERR(dfid)) {
+		retval = PTR_ERR(dfid);
+		p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval);
+		return retval;
+	}
+	if (v9fs_proto_dotl(v9ses))
+		retval = p9_client_unlinkat(dfid, dentry->d_name.name,
+					    v9fs_at_to_dotl_flags(flags));
+	if (retval == -EOPNOTSUPP) {
+		/* Try the one based on path */
+		v9fid = v9fs_fid_clone(dentry);
+		if (IS_ERR(v9fid))
+			return PTR_ERR(v9fid);
+		retval = p9_client_remove(v9fid);
+	}
+	if (!retval) {
+		/*
+		 * directories on unlink should have zero
+		 * link count
+		 */
+		if (flags & AT_REMOVEDIR) {
+			clear_nlink(inode);
+			drop_nlink(dir);
+		} else
+			drop_nlink(inode);
 
-static int
-v9fs_open_created(struct inode *inode, struct file *file)
-{
-	return 0;
+		v9fs_invalidate_inode_attr(inode);
+		v9fs_invalidate_inode_attr(dir);
+	}
+	return retval;
 }
 
-
 /**
  * v9fs_create - Create a file
  * @v9ses: session information
  * @dir: directory that dentry is being created in
  * @dentry:  dentry that is being created
+ * @extension: 9p2000.u extension string to support devices, etc.
  * @perm: create permissions
  * @mode: open mode
- * @extension: 9p2000.u extension string to support devices, etc.
  *
  */
 static struct p9_fid *
@@ -417,66 +648,58 @@ v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
 	struct p9_fid *dfid, *ofid, *fid;
 	struct inode *inode;
 
-	P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
+	p9_debug(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
 
 	err = 0;
 	ofid = NULL;
 	fid = NULL;
 	name = (char *) dentry->d_name.name;
-	dfid = v9fs_fid_clone(dentry->d_parent);
+	dfid = v9fs_fid_lookup(dentry->d_parent);
 	if (IS_ERR(dfid)) {
 		err = PTR_ERR(dfid);
-		P9_DPRINTK(P9_DEBUG_VFS, "fid clone failed %d\n", err);
-		dfid = NULL;
-		goto error;
+		p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
+		return ERR_PTR(err);
 	}
 
 	/* clone a fid to use for creation */
 	ofid = p9_client_walk(dfid, 0, NULL, 1);
 	if (IS_ERR(ofid)) {
 		err = PTR_ERR(ofid);
-		P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
-		ofid = NULL;
-		goto error;
+		p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
+		return ERR_PTR(err);
 	}
 
 	err = p9_client_fcreate(ofid, name, perm, mode, extension);
 	if (err < 0) {
-		P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err);
+		p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err);
 		goto error;
 	}
 
-	/* now walk from the parent so we can get unopened fid */
-	fid = p9_client_walk(dfid, 1, &name, 0);
-	if (IS_ERR(fid)) {
-		err = PTR_ERR(fid);
-		P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
-		fid = NULL;
-		goto error;
-	} else
-		dfid = NULL;
-
-	/* instantiate inode and assign the unopened fid to the dentry */
-	inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
-	if (IS_ERR(inode)) {
-		err = PTR_ERR(inode);
-		P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err);
-		goto error;
+	if (!(perm & P9_DMLINK)) {
+		/* now walk from the parent so we can get unopened fid */
+		fid = p9_client_walk(dfid, 1, &name, 1);
+		if (IS_ERR(fid)) {
+			err = PTR_ERR(fid);
+			p9_debug(P9_DEBUG_VFS,
+				   "p9_client_walk failed %d\n", err);
+			fid = NULL;
+			goto error;
+		}
+		/*
+		 * instantiate inode and assign the unopened fid to the dentry
+		 */
+		inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
+		if (IS_ERR(inode)) {
+			err = PTR_ERR(inode);
+			p9_debug(P9_DEBUG_VFS,
+				   "inode creation failed %d\n", err);
+			goto error;
+		}
+		v9fs_fid_add(dentry, fid);
+		d_instantiate(dentry, inode);
 	}
-
-	if (v9ses->cache)
-		dentry->d_op = &v9fs_cached_dentry_operations;
-	else
-		dentry->d_op = &v9fs_dentry_operations;
-
-	d_instantiate(dentry, inode);
-	v9fs_fid_add(dentry, fid);
 	return ofid;
-
 error:
-	if (dfid)
-		p9_client_clunk(dfid);
-
 	if (ofid)
 		p9_client_clunk(ofid);
 
@@ -487,61 +710,34 @@ error:
 }
 
 /**
- * v9fs_vfs_create - VFS hook to create files
+ * v9fs_vfs_create - VFS hook to create a regular file
+ *
+ * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open().  This is only called
+ * for mknod(2).
+ *
  * @dir: directory inode that is being created
  * @dentry:  dentry that is being deleted
  * @mode: create permissions
- * @nd: path information
  *
  */
 
 static int
-v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode,
-		struct nameidata *nd)
+v9fs_vfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
+		bool excl)
 {
-	int err;
-	u32 perm;
-	int flags;
-	struct v9fs_session_info *v9ses;
+	struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir);
+	u32 perm = unixmode2p9mode(v9ses, mode);
 	struct p9_fid *fid;
-	struct file *filp;
-
-	err = 0;
-	fid = NULL;
-	v9ses = v9fs_inode2v9ses(dir);
-	perm = unixmode2p9mode(v9ses, mode);
-	if (nd && nd->flags & LOOKUP_OPEN)
-		flags = nd->intent.open.flags - 1;
-	else
-		flags = O_RDWR;
-
-	fid = v9fs_create(v9ses, dir, dentry, NULL, perm,
-				v9fs_uflags2omode(flags, v9fs_extended(v9ses)));
-	if (IS_ERR(fid)) {
-		err = PTR_ERR(fid);
-		fid = NULL;
-		goto error;
-	}
 
-	/* if we are opening a file, assign the open fid to the file */
-	if (nd && nd->flags & LOOKUP_OPEN) {
-		filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created);
-		if (IS_ERR(filp)) {
-			err = PTR_ERR(filp);
-			goto error;
-		}
+	/* P9_OEXCL? */
+	fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR);
+	if (IS_ERR(fid))
+		return PTR_ERR(fid);
 
-		filp->private_data = fid;
-	} else
-		p9_client_clunk(fid);
+	v9fs_invalidate_inode_attr(dir);
+	p9_client_clunk(fid);
 
 	return 0;
-
-error:
-	if (fid)
-		p9_client_clunk(fid);
-
-	return err;
 }
 
 /**
@@ -552,14 +748,14 @@ error:
  *
  */
 
-static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
+static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 {
 	int err;
 	u32 perm;
-	struct v9fs_session_info *v9ses;
 	struct p9_fid *fid;
+	struct v9fs_session_info *v9ses;
 
-	P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
+	p9_debug(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
 	err = 0;
 	v9ses = v9fs_inode2v9ses(dir);
 	perm = unixmode2p9mode(v9ses, mode | S_IFDIR);
@@ -567,6 +763,9 @@ static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 	if (IS_ERR(fid)) {
 		err = PTR_ERR(fid);
 		fid = NULL;
+	} else {
+		inc_nlink(dir);
+		v9fs_invalidate_inode_attr(dir);
 	}
 
 	if (fid)
@@ -579,25 +778,27 @@ static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
  * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode
  * @dir:  inode that is being walked from
  * @dentry: dentry that is being walked to?
- * @nameidata: path data
+ * @flags: lookup flags (unused)
  *
  */
 
-static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
-				      struct nameidata *nameidata)
+struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
+				      unsigned int flags)
 {
-	struct super_block *sb;
+	struct dentry *res;
 	struct v9fs_session_info *v9ses;
 	struct p9_fid *dfid, *fid;
 	struct inode *inode;
 	char *name;
-	int result = 0;
 
-	P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n",
-		dir, dentry->d_name.name, dentry, nameidata);
+	p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p flags: %x\n",
+		 dir, dentry->d_name.name, dentry, flags);
+
+	if (dentry->d_name.len > NAME_MAX)
+		return ERR_PTR(-ENAMETOOLONG);
 
-	sb = dir->i_sb;
 	v9ses = v9fs_inode2v9ses(dir);
+	/* We can walk d_parent because we hold the dir->i_mutex */
 	dfid = v9fs_fid_lookup(dentry->d_parent);
 	if (IS_ERR(dfid))
 		return ERR_CAST(dfid);
@@ -605,38 +806,119 @@ static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
 	name = (char *) dentry->d_name.name;
 	fid = p9_client_walk(dfid, 1, &name, 1);
 	if (IS_ERR(fid)) {
-		result = PTR_ERR(fid);
-		if (result == -ENOENT) {
+		if (fid == ERR_PTR(-ENOENT)) {
 			d_add(dentry, NULL);
 			return NULL;
 		}
+		return ERR_CAST(fid);
+	}
+	/*
+	 * Make sure we don't use a wrong inode due to parallel
+	 * unlink. For cached mode create calls request for new
+	 * inode. But with cache disabled, lookup should do this.
+	 */
+	if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
+		inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb);
+	else
+		inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
+	if (IS_ERR(inode)) {
+		p9_client_clunk(fid);
+		return ERR_CAST(inode);
+	}
+	/*
+	 * If we had a rename on the server and a parallel lookup
+	 * for the new name, then make sure we instantiate with
+	 * the new name. ie look up for a/b, while on server somebody
+	 * moved b under k and client parallely did a lookup for
+	 * k/b.
+	 */
+	res = d_materialise_unique(dentry, inode);
+	if (!res)
+		v9fs_fid_add(dentry, fid);
+	else if (!IS_ERR(res))
+		v9fs_fid_add(res, fid);
+	else
+		p9_client_clunk(fid);
+	return res;
+}
 
-		return ERR_PTR(result);
+static int
+v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
+		     struct file *file, unsigned flags, umode_t mode,
+		     int *opened)
+{
+	int err;
+	u32 perm;
+	struct v9fs_inode *v9inode;
+	struct v9fs_session_info *v9ses;
+	struct p9_fid *fid, *inode_fid;
+	struct dentry *res = NULL;
+
+	if (d_unhashed(dentry)) {
+		res = v9fs_vfs_lookup(dir, dentry, 0);
+		if (IS_ERR(res))
+			return PTR_ERR(res);
+
+		if (res)
+			dentry = res;
 	}
 
-	inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
-	if (IS_ERR(inode)) {
-		result = PTR_ERR(inode);
-		inode = NULL;
+	/* Only creates */
+	if (!(flags & O_CREAT) || dentry->d_inode)
+		return finish_no_open(file, res);
+
+	err = 0;
+
+	v9ses = v9fs_inode2v9ses(dir);
+	perm = unixmode2p9mode(v9ses, mode);
+	fid = v9fs_create(v9ses, dir, dentry, NULL, perm,
+				v9fs_uflags2omode(flags,
+						v9fs_proto_dotu(v9ses)));
+	if (IS_ERR(fid)) {
+		err = PTR_ERR(fid);
+		fid = NULL;
 		goto error;
 	}
 
-	result = v9fs_fid_add(dentry, fid);
-	if (result < 0)
+	v9fs_invalidate_inode_attr(dir);
+	v9inode = V9FS_I(dentry->d_inode);
+	mutex_lock(&v9inode->v_mutex);
+	if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) &&
+	    !v9inode->writeback_fid &&
+	    ((flags & O_ACCMODE) != O_RDONLY)) {
+		/*
+		 * clone a fid and add it to writeback_fid
+		 * we do it during open time instead of
+		 * page dirty time via write_begin/page_mkwrite
+		 * because we want write after unlink usecase
+		 * to work.
+		 */
+		inode_fid = v9fs_writeback_fid(dentry);
+		if (IS_ERR(inode_fid)) {
+			err = PTR_ERR(inode_fid);
+			mutex_unlock(&v9inode->v_mutex);
+			goto error;
+		}
+		v9inode->writeback_fid = (void *) inode_fid;
+	}
+	mutex_unlock(&v9inode->v_mutex);
+	err = finish_open(file, dentry, generic_file_open, opened);
+	if (err)
 		goto error;
 
-	if ((fid->qid.version) && (v9ses->cache))
-		dentry->d_op = &v9fs_cached_dentry_operations;
-	else
-		dentry->d_op = &v9fs_dentry_operations;
+	file->private_data = fid;
+	if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
+		v9fs_cache_inode_set_cookie(dentry->d_inode, file);
 
-	d_add(dentry, inode);
-	return NULL;
+	*opened |= FILE_CREATED;
+out:
+	dput(res);
+	return err;
 
 error:
-	p9_client_clunk(fid);
-
-	return ERR_PTR(result);
+	if (fid)
+		p9_client_clunk(fid);
+	goto out;
 }
 
 /**
@@ -646,7 +928,7 @@ error:
  *
  */
 
-static int v9fs_vfs_unlink(struct inode *i, struct dentry *d)
+int v9fs_vfs_unlink(struct inode *i, struct dentry *d)
 {
 	return v9fs_remove(i, d, 0);
 }
@@ -658,9 +940,9 @@ static int v9fs_vfs_unlink(struct inode *i, struct dentry *d)
  *
  */
 
-static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d)
+int v9fs_vfs_rmdir(struct inode *i, struct dentry *d)
 {
-	return v9fs_remove(i, d, 1);
+	return v9fs_remove(i, d, AT_REMOVEDIR);
 }
 
 /**
@@ -672,21 +954,23 @@ static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d)
  *
  */
 
-static int
+int
 v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
 		struct inode *new_dir, struct dentry *new_dentry)
 {
+	int retval;
 	struct inode *old_inode;
+	struct inode *new_inode;
 	struct v9fs_session_info *v9ses;
 	struct p9_fid *oldfid;
 	struct p9_fid *olddirfid;
 	struct p9_fid *newdirfid;
 	struct p9_wstat wstat;
-	int retval;
 
-	P9_DPRINTK(P9_DEBUG_VFS, "\n");
+	p9_debug(P9_DEBUG_VFS, "\n");
 	retval = 0;
 	old_inode = old_dentry->d_inode;
+	new_inode = new_dentry->d_inode;
 	v9ses = v9fs_inode2v9ses(old_inode);
 	oldfid = v9fs_fid_lookup(old_dentry);
 	if (IS_ERR(oldfid))
@@ -704,20 +988,51 @@ v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
 		goto clunk_olddir;
 	}
 
-	/* 9P can only handle file rename in the same directory */
-	if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) {
-		P9_DPRINTK(P9_DEBUG_ERROR,
-				"old dir and new dir are different\n");
+	down_write(&v9ses->rename_sem);
+	if (v9fs_proto_dotl(v9ses)) {
+		retval = p9_client_renameat(olddirfid, old_dentry->d_name.name,
+					    newdirfid, new_dentry->d_name.name);
+		if (retval == -EOPNOTSUPP)
+			retval = p9_client_rename(oldfid, newdirfid,
+						  new_dentry->d_name.name);
+		if (retval != -EOPNOTSUPP)
+			goto clunk_newdir;
+	}
+	if (old_dentry->d_parent != new_dentry->d_parent) {
+		/*
+		 * 9P .u can only handle file rename in the same directory
+		 */
+
+		p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n");
 		retval = -EXDEV;
 		goto clunk_newdir;
 	}
-
 	v9fs_blank_wstat(&wstat);
 	wstat.muid = v9ses->uname;
 	wstat.name = (char *) new_dentry->d_name.name;
 	retval = p9_client_wstat(oldfid, &wstat);
 
 clunk_newdir:
+	if (!retval) {
+		if (new_inode) {
+			if (S_ISDIR(new_inode->i_mode))
+				clear_nlink(new_inode);
+			else
+				drop_nlink(new_inode);
+		}
+		if (S_ISDIR(old_inode->i_mode)) {
+			if (!new_inode)
+				inc_nlink(new_dir);
+			drop_nlink(old_dir);
+		}
+		v9fs_invalidate_inode_attr(old_inode);
+		v9fs_invalidate_inode_attr(old_dir);
+		v9fs_invalidate_inode_attr(new_dir);
+
+		/* successful rename */
+		d_move(old_dentry, new_dentry);
+	}
+	up_write(&v9ses->rename_sem);
 	p9_client_clunk(newdirfid);
 
 clunk_olddir:
@@ -739,17 +1054,16 @@ static int
 v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
 		 struct kstat *stat)
 {
-	int err;
 	struct v9fs_session_info *v9ses;
 	struct p9_fid *fid;
 	struct p9_wstat *st;
 
-	P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry);
-	err = -EPERM;
-	v9ses = v9fs_inode2v9ses(dentry->d_inode);
-	if (v9ses->cache == CACHE_LOOSE)
-		return simple_getattr(mnt, dentry, stat);
-
+	p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry);
+	v9ses = v9fs_dentry2v9ses(dentry);
+	if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
+		generic_fillattr(dentry->d_inode, stat);
+		return 0;
+	}
 	fid = v9fs_fid_lookup(dentry);
 	if (IS_ERR(fid))
 		return PTR_ERR(fid);
@@ -759,8 +1073,9 @@ v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
 		return PTR_ERR(st);
 
 	v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb);
-		generic_fillattr(dentry->d_inode, stat);
+	generic_fillattr(dentry->d_inode, stat);
 
+	p9stat_free(st);
 	kfree(st);
 	return 0;
 }
@@ -779,9 +1094,13 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
 	struct p9_fid *fid;
 	struct p9_wstat wstat;
 
-	P9_DPRINTK(P9_DEBUG_VFS, "\n");
+	p9_debug(P9_DEBUG_VFS, "\n");
+	retval = inode_change_ok(dentry->d_inode, iattr);
+	if (retval)
+		return retval;
+
 	retval = -EPERM;
-	v9ses = v9fs_inode2v9ses(dentry->d_inode);
+	v9ses = v9fs_dentry2v9ses(dentry);
 	fid = v9fs_fid_lookup(dentry);
 	if(IS_ERR(fid))
 		return PTR_ERR(fid);
@@ -799,7 +1118,7 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
 	if (iattr->ia_valid & ATTR_SIZE)
 		wstat.length = iattr->ia_size;
 
-	if (v9fs_extended(v9ses)) {
+	if (v9fs_proto_dotu(v9ses)) {
 		if (iattr->ia_valid & ATTR_UID)
 			wstat.n_uid = iattr->ia_uid;
 
@@ -807,11 +1126,23 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
 			wstat.n_gid = iattr->ia_gid;
 	}
 
+	/* Write all dirty data */
+	if (S_ISREG(dentry->d_inode->i_mode))
+		filemap_write_and_wait(dentry->d_inode->i_mapping);
+
 	retval = p9_client_wstat(fid, &wstat);
-	if (retval >= 0)
-		retval = inode_setattr(dentry->d_inode, iattr);
+	if (retval < 0)
+		return retval;
 
-	return retval;
+	if ((iattr->ia_valid & ATTR_SIZE) &&
+	    iattr->ia_size != i_size_read(dentry->d_inode))
+		truncate_setsize(dentry->d_inode, iattr->ia_size);
+
+	v9fs_invalidate_inode_attr(dentry->d_inode);
+
+	setattr_copy(dentry->d_inode, iattr);
+	mark_inode_dirty(dentry->d_inode);
+	return 0;
 }
 
 /**
@@ -826,10 +1157,14 @@ void
 v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode,
 	struct super_block *sb)
 {
+	umode_t mode;
 	char ext[32];
+	char tag_name[14];
+	unsigned int i_nlink;
 	struct v9fs_session_info *v9ses = sb->s_fs_info;
+	struct v9fs_inode *v9inode = V9FS_I(inode);
 
-	inode->i_nlink = 1;
+	set_nlink(inode, 1);
 
 	inode->i_atime.tv_sec = stat->atime;
 	inode->i_mtime.tv_sec = stat->mtime;
@@ -838,40 +1173,34 @@ v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode,
 	inode->i_uid = v9ses->dfltuid;
 	inode->i_gid = v9ses->dfltgid;
 
-	if (v9fs_extended(v9ses)) {
+	if (v9fs_proto_dotu(v9ses)) {
 		inode->i_uid = stat->n_uid;
 		inode->i_gid = stat->n_gid;
 	}
-
-	inode->i_mode = p9mode2unixmode(v9ses, stat->mode);
-	if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) {
-		char type = 0;
-		int major = -1;
-		int minor = -1;
-
-		strncpy(ext, stat->extension, sizeof(ext));
-		sscanf(ext, "%c %u %u", &type, &major, &minor);
-		switch (type) {
-		case 'c':
-			inode->i_mode &= ~S_IFBLK;
-			inode->i_mode |= S_IFCHR;
-			break;
-		case 'b':
-			break;
-		default:
-			P9_DPRINTK(P9_DEBUG_ERROR,
-				"Unknown special type %c %s\n", type,
-				stat->extension);
-		};
-		inode->i_rdev = MKDEV(major, minor);
-		init_special_inode(inode, inode->i_mode, inode->i_rdev);
-	} else
-		inode->i_rdev = 0;
-
-	inode->i_size = stat->length;
+	if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) {
+		if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) {
+			/*
+			 * Hadlink support got added later to
+			 * to the .u extension. So there can be
+			 * server out there that doesn't support
+			 * this even with .u extension. So check
+			 * for non NULL stat->extension
+			 */
+			strlcpy(ext, stat->extension, sizeof(ext));
+			/* HARDLINKCOUNT %u */
+			sscanf(ext, "%13s %u", tag_name, &i_nlink);
+			if (!strncmp(tag_name, "HARDLINKCOUNT", 13))
+				set_nlink(inode, i_nlink);
+		}
+	}
+	mode = p9mode2perm(v9ses, stat);
+	mode |= inode->i_mode & ~S_IALLUGO;
+	inode->i_mode = mode;
+	i_size_write(inode, stat->length);
 
 	/* not real number of blocks, but 512 byte ones ... */
-	inode->i_blocks = (inode->i_size + 512 - 1) >> 9;
+	inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9;
+	v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR;
 }
 
 /**
@@ -910,14 +1239,14 @@ static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen)
 	struct p9_fid *fid;
 	struct p9_wstat *st;
 
-	P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name);
+	p9_debug(P9_DEBUG_VFS, " %s\n", dentry->d_name.name);
 	retval = -EPERM;
-	v9ses = v9fs_inode2v9ses(dentry->d_inode);
+	v9ses = v9fs_dentry2v9ses(dentry);
 	fid = v9fs_fid_lookup(dentry);
 	if (IS_ERR(fid))
 		return PTR_ERR(fid);
 
-	if (!v9fs_extended(v9ses))
+	if (!v9fs_proto_dotu(v9ses))
 		return -EBADF;
 
 	st = p9_client_stat(fid);
@@ -930,57 +1259,19 @@ static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen)
 	}
 
 	/* copy extension buffer into buffer */
-	strncpy(buffer, st->extension, buflen);
+	retval = min(strlen(st->extension)+1, (size_t)buflen);
+	memcpy(buffer, st->extension, retval);
 
-	P9_DPRINTK(P9_DEBUG_VFS,
-		"%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer);
-
-	retval = buflen;
+	p9_debug(P9_DEBUG_VFS, "%s -> %s (%.*s)\n",
+		 dentry->d_name.name, st->extension, buflen, buffer);
 
 done:
+	p9stat_free(st);
 	kfree(st);
 	return retval;
 }
 
 /**
- * v9fs_vfs_readlink - read a symlink's location
- * @dentry: dentry for symlink
- * @buffer: buffer to load symlink location into
- * @buflen: length of buffer
- *
- */
-
-static int v9fs_vfs_readlink(struct dentry *dentry, char __user * buffer,
-			     int buflen)
-{
-	int retval;
-	int ret;
-	char *link = __getname();
-
-	if (unlikely(!link))
-		return -ENOMEM;
-
-	if (buflen > PATH_MAX)
-		buflen = PATH_MAX;
-
-	P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_name.name,
-									dentry);
-
-	retval = v9fs_readlink(dentry, link, buflen);
-
-	if (retval > 0) {
-		if ((ret = copy_to_user(buffer, link, retval)) != 0) {
-			P9_DPRINTK(P9_DEBUG_ERROR,
-					"problem copying to user: %d\n", ret);
-			retval = ret;
-		}
-	}
-
-	__putname(link);
-	return retval;
-}
-
-/**
  * v9fs_vfs_follow_link - follow a symlink path
  * @dentry: dentry for symlink
  * @nd: nameidata
@@ -992,7 +1283,7 @@ static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd)
 	int len = 0;
 	char *link = __getname();
 
-	P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name);
+	p9_debug(P9_DEBUG_VFS, "%s\n", dentry->d_name.name);
 
 	if (!link)
 		link = ERR_PTR(-ENOMEM);
@@ -1003,7 +1294,7 @@ static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd)
 			__putname(link);
 			link = ERR_PTR(len);
 		} else
-			link[len] = 0;
+			link[min(len, PATH_MAX-1)] = 0;
 	}
 	nd_set_link(nd, link);
 
@@ -1018,13 +1309,13 @@ static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd)
  *
  */
 
-static void
+void
 v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
 {
 	char *s = nd_get_link(nd);
 
-	P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name,
-		IS_ERR(s) ? "<error>" : s);
+	p9_debug(P9_DEBUG_VFS, " %s %s\n",
+		 dentry->d_name.name, IS_ERR(s) ? "<error>" : s);
 	if (!IS_ERR(s))
 		__putname(s);
 }
@@ -1033,30 +1324,29 @@ v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
  * v9fs_vfs_mkspecial - create a special file
  * @dir: inode to create special file in
  * @dentry: dentry to create
- * @mode: mode to create special file
+ * @perm: mode to create special file
  * @extension: 9p2000.u format extension string representing special file
  *
  */
 
 static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
-	int mode, const char *extension)
+	u32 perm, const char *extension)
 {
-	u32 perm;
-	struct v9fs_session_info *v9ses;
 	struct p9_fid *fid;
+	struct v9fs_session_info *v9ses;
 
 	v9ses = v9fs_inode2v9ses(dir);
-	if (!v9fs_extended(v9ses)) {
-		P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n");
+	if (!v9fs_proto_dotu(v9ses)) {
+		p9_debug(P9_DEBUG_ERROR, "not extended\n");
 		return -EPERM;
 	}
 
-	perm = unixmode2p9mode(v9ses, mode);
 	fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm,
 								P9_OREAD);
 	if (IS_ERR(fid))
 		return PTR_ERR(fid);
 
+	v9fs_invalidate_inode_attr(dir);
 	p9_client_clunk(fid);
 	return 0;
 }
@@ -1074,10 +1364,10 @@ static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
 static int
 v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
 {
-	P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino,
-					dentry->d_name.name, symname);
+	p9_debug(P9_DEBUG_VFS, " %lu,%s,%s\n",
+		 dir->i_ino, dentry->d_name.name, symname);
 
-	return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname);
+	return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname);
 }
 
 /**
@@ -1093,12 +1383,11 @@ v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
 	      struct dentry *dentry)
 {
 	int retval;
-	struct p9_fid *oldfid;
 	char *name;
+	struct p9_fid *oldfid;
 
-	P9_DPRINTK(P9_DEBUG_VFS,
-		" %lu,%s,%s\n", dir->i_ino, dentry->d_name.name,
-		old_dentry->d_name.name);
+	p9_debug(P9_DEBUG_VFS, " %lu,%s,%s\n",
+		 dir->i_ino, dentry->d_name.name, old_dentry->d_name.name);
 
 	oldfid = v9fs_fid_clone(old_dentry);
 	if (IS_ERR(oldfid))
@@ -1113,7 +1402,10 @@ v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
 	sprintf(name, "%d\n", oldfid->fid);
 	retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name);
 	__putname(name);
-
+	if (!retval) {
+		v9fs_refresh_inode(oldfid, old_dentry->d_inode);
+		v9fs_invalidate_inode_attr(dir);
+	}
 clunk_fid:
 	p9_client_clunk(oldfid);
 	return retval;
@@ -1129,14 +1421,16 @@ clunk_fid:
  */
 
 static int
-v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
+v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev)
 {
+	struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir);
 	int retval;
 	char *name;
+	u32 perm;
 
-	P9_DPRINTK(P9_DEBUG_VFS,
-		" %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
-		dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev));
+	p9_debug(P9_DEBUG_VFS, " %lu,%s mode: %hx MAJOR: %u MINOR: %u\n",
+		 dir->i_ino, dentry->d_name.name, mode,
+		 MAJOR(rdev), MINOR(rdev));
 
 	if (!new_valid_dev(rdev))
 		return -EINVAL;
@@ -1151,20 +1445,59 @@ v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
 		sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev));
 	else if (S_ISFIFO(mode))
 		*name = 0;
+	else if (S_ISSOCK(mode))
+		*name = 0;
 	else {
 		__putname(name);
 		return -EINVAL;
 	}
 
-	retval = v9fs_vfs_mkspecial(dir, dentry, mode, name);
+	perm = unixmode2p9mode(v9ses, mode);
+	retval = v9fs_vfs_mkspecial(dir, dentry, perm, name);
 	__putname(name);
 
 	return retval;
 }
 
-static const struct inode_operations v9fs_dir_inode_operations_ext = {
+int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode)
+{
+	int umode;
+	dev_t rdev;
+	loff_t i_size;
+	struct p9_wstat *st;
+	struct v9fs_session_info *v9ses;
+
+	v9ses = v9fs_inode2v9ses(inode);
+	st = p9_client_stat(fid);
+	if (IS_ERR(st))
+		return PTR_ERR(st);
+	/*
+	 * Don't update inode if the file type is different
+	 */
+	umode = p9mode2unixmode(v9ses, st, &rdev);
+	if ((inode->i_mode & S_IFMT) != (umode & S_IFMT))
+		goto out;
+
+	spin_lock(&inode->i_lock);
+	/*
+	 * We don't want to refresh inode->i_size,
+	 * because we may have cached data
+	 */
+	i_size = inode->i_size;
+	v9fs_stat2inode(st, inode, inode->i_sb);
+	if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
+		inode->i_size = i_size;
+	spin_unlock(&inode->i_lock);
+out:
+	p9stat_free(st);
+	kfree(st);
+	return 0;
+}
+
+static const struct inode_operations v9fs_dir_inode_operations_dotu = {
 	.create = v9fs_vfs_create,
 	.lookup = v9fs_vfs_lookup,
+	.atomic_open = v9fs_vfs_atomic_open,
 	.symlink = v9fs_vfs_symlink,
 	.link = v9fs_vfs_link,
 	.unlink = v9fs_vfs_unlink,
@@ -1172,7 +1505,6 @@ static const struct inode_operations v9fs_dir_inode_operations_ext = {
 	.rmdir = v9fs_vfs_rmdir,
 	.mknod = v9fs_vfs_mknod,
 	.rename = v9fs_vfs_rename,
-	.readlink = v9fs_vfs_readlink,
 	.getattr = v9fs_vfs_getattr,
 	.setattr = v9fs_vfs_setattr,
 };
@@ -1180,6 +1512,7 @@ static const struct inode_operations v9fs_dir_inode_operations_ext = {
 static const struct inode_operations v9fs_dir_inode_operations = {
 	.create = v9fs_vfs_create,
 	.lookup = v9fs_vfs_lookup,
+	.atomic_open = v9fs_vfs_atomic_open,
 	.unlink = v9fs_vfs_unlink,
 	.mkdir = v9fs_vfs_mkdir,
 	.rmdir = v9fs_vfs_rmdir,
@@ -1195,9 +1528,10 @@ static const struct inode_operations v9fs_file_inode_operations = {
 };
 
 static const struct inode_operations v9fs_symlink_inode_operations = {
-	.readlink = v9fs_vfs_readlink,
+	.readlink = generic_readlink,
 	.follow_link = v9fs_vfs_follow_link,
 	.put_link = v9fs_vfs_put_link,
 	.getattr = v9fs_vfs_getattr,
 	.setattr = v9fs_vfs_setattr,
 };
+
diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
new file mode 100644
index 00000000000..1fa85aae24d
--- /dev/null
+++ b/fs/9p/vfs_inode_dotl.c
@@ -0,0 +1,1016 @@
+/*
+ *  linux/fs/9p/vfs_inode_dotl.c
+ *
+ * This file contains vfs inode ops for the 9P2000.L protocol.
+ *
+ *  Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
+ *  Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2
+ *  as published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to:
+ *  Free Software Foundation
+ *  51 Franklin Street, Fifth Floor
+ *  Boston, MA  02111-1301  USA
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/file.h>
+#include <linux/pagemap.h>
+#include <linux/stat.h>
+#include <linux/string.h>
+#include <linux/inet.h>
+#include <linux/namei.h>
+#include <linux/idr.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/xattr.h>
+#include <linux/posix_acl.h>
+#include <net/9p/9p.h>
+#include <net/9p/client.h>
+
+#include "v9fs.h"
+#include "v9fs_vfs.h"
+#include "fid.h"
+#include "cache.h"
+#include "xattr.h"
+#include "acl.h"
+
+static int
+v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
+		    dev_t rdev);
+
+/**
+ * v9fs_get_fsgid_for_create - Helper function to get the gid for creating a
+ * new file system object. This checks the S_ISGID to determine the owning
+ * group of the new file system object.
+ */
+
+static kgid_t v9fs_get_fsgid_for_create(struct inode *dir_inode)
+{
+	BUG_ON(dir_inode == NULL);
+
+	if (dir_inode->i_mode & S_ISGID) {
+		/* set_gid bit is set.*/
+		return dir_inode->i_gid;
+	}
+	return current_fsgid();
+}
+
+static int v9fs_test_inode_dotl(struct inode *inode, void *data)
+{
+	struct v9fs_inode *v9inode = V9FS_I(inode);
+	struct p9_stat_dotl *st = (struct p9_stat_dotl *)data;
+
+	/* don't match inode of different type */
+	if ((inode->i_mode & S_IFMT) != (st->st_mode & S_IFMT))
+		return 0;
+
+	if (inode->i_generation != st->st_gen)
+		return 0;
+
+	/* compare qid details */
+	if (memcmp(&v9inode->qid.version,
+		   &st->qid.version, sizeof(v9inode->qid.version)))
+		return 0;
+
+	if (v9inode->qid.type != st->qid.type)
+		return 0;
+	return 1;
+}
+
+/* Always get a new inode */
+static int v9fs_test_new_inode_dotl(struct inode *inode, void *data)
+{
+	return 0;
+}
+
+static int v9fs_set_inode_dotl(struct inode *inode,  void *data)
+{
+	struct v9fs_inode *v9inode = V9FS_I(inode);
+	struct p9_stat_dotl *st = (struct p9_stat_dotl *)data;
+
+	memcpy(&v9inode->qid, &st->qid, sizeof(st->qid));
+	inode->i_generation = st->st_gen;
+	return 0;
+}
+
+static struct inode *v9fs_qid_iget_dotl(struct super_block *sb,
+					struct p9_qid *qid,
+					struct p9_fid *fid,
+					struct p9_stat_dotl *st,
+					int new)
+{
+	int retval;
+	unsigned long i_ino;
+	struct inode *inode;
+	struct v9fs_session_info *v9ses = sb->s_fs_info;
+	int (*test)(struct inode *, void *);
+
+	if (new)
+		test = v9fs_test_new_inode_dotl;
+	else
+		test = v9fs_test_inode_dotl;
+
+	i_ino = v9fs_qid2ino(qid);
+	inode = iget5_locked(sb, i_ino, test, v9fs_set_inode_dotl, st);
+	if (!inode)
+		return ERR_PTR(-ENOMEM);
+	if (!(inode->i_state & I_NEW))
+		return inode;
+	/*
+	 * initialize the inode with the stat info
+	 * FIXME!! we may need support for stale inodes
+	 * later.
+	 */
+	inode->i_ino = i_ino;
+	retval = v9fs_init_inode(v9ses, inode,
+				 st->st_mode, new_decode_dev(st->st_rdev));
+	if (retval)
+		goto error;
+
+	v9fs_stat2inode_dotl(st, inode);
+	v9fs_cache_inode_get_cookie(inode);
+	retval = v9fs_get_acl(inode, fid);
+	if (retval)
+		goto error;
+
+	unlock_new_inode(inode);
+	return inode;
+error:
+	unlock_new_inode(inode);
+	iput(inode);
+	return ERR_PTR(retval);
+
+}
+
+struct inode *
+v9fs_inode_from_fid_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid,
+			 struct super_block *sb, int new)
+{
+	struct p9_stat_dotl *st;
+	struct inode *inode = NULL;
+
+	st = p9_client_getattr_dotl(fid, P9_STATS_BASIC | P9_STATS_GEN);
+	if (IS_ERR(st))
+		return ERR_CAST(st);
+
+	inode = v9fs_qid_iget_dotl(sb, &st->qid, fid, st, new);
+	kfree(st);
+	return inode;
+}
+
+struct dotl_openflag_map {
+	int open_flag;
+	int dotl_flag;
+};
+
+static int v9fs_mapped_dotl_flags(int flags)
+{
+	int i;
+	int rflags = 0;
+	struct dotl_openflag_map dotl_oflag_map[] = {
+		{ O_CREAT,	P9_DOTL_CREATE },
+		{ O_EXCL,	P9_DOTL_EXCL },
+		{ O_NOCTTY,	P9_DOTL_NOCTTY },
+		{ O_APPEND,	P9_DOTL_APPEND },
+		{ O_NONBLOCK,	P9_DOTL_NONBLOCK },
+		{ O_DSYNC,	P9_DOTL_DSYNC },
+		{ FASYNC,	P9_DOTL_FASYNC },
+		{ O_DIRECT,	P9_DOTL_DIRECT },
+		{ O_LARGEFILE,	P9_DOTL_LARGEFILE },
+		{ O_DIRECTORY,	P9_DOTL_DIRECTORY },
+		{ O_NOFOLLOW,	P9_DOTL_NOFOLLOW },
+		{ O_NOATIME,	P9_DOTL_NOATIME },
+		{ O_CLOEXEC,	P9_DOTL_CLOEXEC },
+		{ O_SYNC,	P9_DOTL_SYNC},
+	};
+	for (i = 0; i < ARRAY_SIZE(dotl_oflag_map); i++) {
+		if (flags & dotl_oflag_map[i].open_flag)
+			rflags |= dotl_oflag_map[i].dotl_flag;
+	}
+	return rflags;
+}
+
+/**
+ * v9fs_open_to_dotl_flags- convert Linux specific open flags to
+ * plan 9 open flag.
+ * @flags: flags to convert
+ */
+int v9fs_open_to_dotl_flags(int flags)
+{
+	int rflags = 0;
+
+	/*
+	 * We have same bits for P9_DOTL_READONLY, P9_DOTL_WRONLY
+	 * and P9_DOTL_NOACCESS
+	 */
+	rflags |= flags & O_ACCMODE;
+	rflags |= v9fs_mapped_dotl_flags(flags);
+
+	return rflags;
+}
+
+/**
+ * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol.
+ * @dir: directory inode that is being created
+ * @dentry:  dentry that is being deleted
+ * @omode: create permissions
+ *
+ */
+
+static int
+v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
+		bool excl)
+{
+	return v9fs_vfs_mknod_dotl(dir, dentry, omode, 0);
+}
+
+static int
+v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
+			  struct file *file, unsigned flags, umode_t omode,
+			  int *opened)
+{
+	int err = 0;
+	kgid_t gid;
+	umode_t mode;
+	char *name = NULL;
+	struct p9_qid qid;
+	struct inode *inode;
+	struct p9_fid *fid = NULL;
+	struct v9fs_inode *v9inode;
+	struct p9_fid *dfid, *ofid, *inode_fid;
+	struct v9fs_session_info *v9ses;
+	struct posix_acl *pacl = NULL, *dacl = NULL;
+	struct dentry *res = NULL;
+
+	if (d_unhashed(dentry)) {
+		res = v9fs_vfs_lookup(dir, dentry, 0);
+		if (IS_ERR(res))
+			return PTR_ERR(res);
+
+		if (res)
+			dentry = res;
+	}
+
+	/* Only creates */
+	if (!(flags & O_CREAT) || dentry->d_inode)
+		return	finish_no_open(file, res);
+
+	v9ses = v9fs_inode2v9ses(dir);
+
+	name = (char *) dentry->d_name.name;
+	p9_debug(P9_DEBUG_VFS, "name:%s flags:0x%x mode:0x%hx\n",
+		 name, flags, omode);
+
+	dfid = v9fs_fid_lookup(dentry->d_parent);
+	if (IS_ERR(dfid)) {
+		err = PTR_ERR(dfid);
+		p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
+		goto out;
+	}
+
+	/* clone a fid to use for creation */
+	ofid = p9_client_walk(dfid, 0, NULL, 1);
+	if (IS_ERR(ofid)) {
+		err = PTR_ERR(ofid);
+		p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
+		goto out;
+	}
+
+	gid = v9fs_get_fsgid_for_create(dir);
+
+	mode = omode;
+	/* Update mode based on ACL value */
+	err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
+	if (err) {
+		p9_debug(P9_DEBUG_VFS, "Failed to get acl values in creat %d\n",
+			 err);
+		goto error;
+	}
+	err = p9_client_create_dotl(ofid, name, v9fs_open_to_dotl_flags(flags),
+				    mode, gid, &qid);
+	if (err < 0) {
+		p9_debug(P9_DEBUG_VFS, "p9_client_open_dotl failed in creat %d\n",
+			 err);
+		goto error;
+	}
+	v9fs_invalidate_inode_attr(dir);
+
+	/* instantiate inode and assign the unopened fid to the dentry */
+	fid = p9_client_walk(dfid, 1, &name, 1);
+	if (IS_ERR(fid)) {
+		err = PTR_ERR(fid);
+		p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
+		fid = NULL;
+		goto error;
+	}
+	inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
+	if (IS_ERR(inode)) {
+		err = PTR_ERR(inode);
+		p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", err);
+		goto error;
+	}
+	/* Now set the ACL based on the default value */
+	v9fs_set_create_acl(inode, fid, dacl, pacl);
+
+	v9fs_fid_add(dentry, fid);
+	d_instantiate(dentry, inode);
+
+	v9inode = V9FS_I(inode);
+	mutex_lock(&v9inode->v_mutex);
+	if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) &&
+	    !v9inode->writeback_fid &&
+	    ((flags & O_ACCMODE) != O_RDONLY)) {
+		/*
+		 * clone a fid and add it to writeback_fid
+		 * we do it during open time instead of
+		 * page dirty time via write_begin/page_mkwrite
+		 * because we want write after unlink usecase
+		 * to work.
+		 */
+		inode_fid = v9fs_writeback_fid(dentry);
+		if (IS_ERR(inode_fid)) {
+			err = PTR_ERR(inode_fid);
+			mutex_unlock(&v9inode->v_mutex);
+			goto err_clunk_old_fid;
+		}
+		v9inode->writeback_fid = (void *) inode_fid;
+	}
+	mutex_unlock(&v9inode->v_mutex);
+	/* Since we are opening a file, assign the open fid to the file */
+	err = finish_open(file, dentry, generic_file_open, opened);
+	if (err)
+		goto err_clunk_old_fid;
+	file->private_data = ofid;
+	if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
+		v9fs_cache_inode_set_cookie(inode, file);
+	*opened |= FILE_CREATED;
+out:
+	v9fs_put_acl(dacl, pacl);
+	dput(res);
+	return err;
+
+error:
+	if (fid)
+		p9_client_clunk(fid);
+err_clunk_old_fid:
+	if (ofid)
+		p9_client_clunk(ofid);
+	goto out;
+}
+
+/**
+ * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory
+ * @dir:  inode that is being unlinked
+ * @dentry: dentry that is being unlinked
+ * @omode: mode for new directory
+ *
+ */
+
+static int v9fs_vfs_mkdir_dotl(struct inode *dir,
+			       struct dentry *dentry, umode_t omode)
+{
+	int err;
+	struct v9fs_session_info *v9ses;
+	struct p9_fid *fid = NULL, *dfid = NULL;
+	kgid_t gid;
+	char *name;
+	umode_t mode;
+	struct inode *inode;
+	struct p9_qid qid;
+	struct dentry *dir_dentry;
+	struct posix_acl *dacl = NULL, *pacl = NULL;
+
+	p9_debug(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
+	err = 0;
+	v9ses = v9fs_inode2v9ses(dir);
+
+	omode |= S_IFDIR;
+	if (dir->i_mode & S_ISGID)
+		omode |= S_ISGID;
+
+	dir_dentry = dentry->d_parent;
+	dfid = v9fs_fid_lookup(dir_dentry);
+	if (IS_ERR(dfid)) {
+		err = PTR_ERR(dfid);
+		p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
+		dfid = NULL;
+		goto error;
+	}
+
+	gid = v9fs_get_fsgid_for_create(dir);
+	mode = omode;
+	/* Update mode based on ACL value */
+	err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
+	if (err) {
+		p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mkdir %d\n",
+			 err);
+		goto error;
+	}
+	name = (char *) dentry->d_name.name;
+	err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid);
+	if (err < 0)
+		goto error;
+
+	fid = p9_client_walk(dfid, 1, &name, 1);
+	if (IS_ERR(fid)) {
+		err = PTR_ERR(fid);
+		p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
+			 err);
+		fid = NULL;
+		goto error;
+	}
+
+	/* instantiate inode and assign the unopened fid to the dentry */
+	if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
+		inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
+		if (IS_ERR(inode)) {
+			err = PTR_ERR(inode);
+			p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
+				 err);
+			goto error;
+		}
+		v9fs_fid_add(dentry, fid);
+		v9fs_set_create_acl(inode, fid, dacl, pacl);
+		d_instantiate(dentry, inode);
+		fid = NULL;
+		err = 0;
+	} else {
+		/*
+		 * Not in cached mode. No need to populate
+		 * inode with stat. We need to get an inode
+		 * so that we can set the acl with dentry
+		 */
+		inode = v9fs_get_inode(dir->i_sb, mode, 0);
+		if (IS_ERR(inode)) {
+			err = PTR_ERR(inode);
+			goto error;
+		}
+		v9fs_set_create_acl(inode, fid, dacl, pacl);
+		d_instantiate(dentry, inode);
+	}
+	inc_nlink(dir);
+	v9fs_invalidate_inode_attr(dir);
+error:
+	if (fid)
+		p9_client_clunk(fid);
+	v9fs_put_acl(dacl, pacl);
+	return err;
+}
+
+static int
+v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry,
+		 struct kstat *stat)
+{
+	struct v9fs_session_info *v9ses;
+	struct p9_fid *fid;
+	struct p9_stat_dotl *st;
+
+	p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry);
+	v9ses = v9fs_dentry2v9ses(dentry);
+	if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
+		generic_fillattr(dentry->d_inode, stat);
+		return 0;
+	}
+	fid = v9fs_fid_lookup(dentry);
+	if (IS_ERR(fid))
+		return PTR_ERR(fid);
+
+	/* Ask for all the fields in stat structure. Server will return
+	 * whatever it supports
+	 */
+
+	st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
+	if (IS_ERR(st))
+		return PTR_ERR(st);
+
+	v9fs_stat2inode_dotl(st, dentry->d_inode);
+	generic_fillattr(dentry->d_inode, stat);
+	/* Change block size to what the server returned */
+	stat->blksize = st->st_blksize;
+
+	kfree(st);
+	return 0;
+}
+
+/*
+ * Attribute flags.
+ */
+#define P9_ATTR_MODE		(1 << 0)
+#define P9_ATTR_UID		(1 << 1)
+#define P9_ATTR_GID		(1 << 2)
+#define P9_ATTR_SIZE		(1 << 3)
+#define P9_ATTR_ATIME		(1 << 4)
+#define P9_ATTR_MTIME		(1 << 5)
+#define P9_ATTR_CTIME		(1 << 6)
+#define P9_ATTR_ATIME_SET	(1 << 7)
+#define P9_ATTR_MTIME_SET	(1 << 8)
+
+struct dotl_iattr_map {
+	int iattr_valid;
+	int p9_iattr_valid;
+};
+
+static int v9fs_mapped_iattr_valid(int iattr_valid)
+{
+	int i;
+	int p9_iattr_valid = 0;
+	struct dotl_iattr_map dotl_iattr_map[] = {
+		{ ATTR_MODE,		P9_ATTR_MODE },
+		{ ATTR_UID,		P9_ATTR_UID },
+		{ ATTR_GID,		P9_ATTR_GID },
+		{ ATTR_SIZE,		P9_ATTR_SIZE },
+		{ ATTR_ATIME,		P9_ATTR_ATIME },
+		{ ATTR_MTIME,		P9_ATTR_MTIME },
+		{ ATTR_CTIME,		P9_ATTR_CTIME },
+		{ ATTR_ATIME_SET,	P9_ATTR_ATIME_SET },
+		{ ATTR_MTIME_SET,	P9_ATTR_MTIME_SET },
+	};
+	for (i = 0; i < ARRAY_SIZE(dotl_iattr_map); i++) {
+		if (iattr_valid & dotl_iattr_map[i].iattr_valid)
+			p9_iattr_valid |= dotl_iattr_map[i].p9_iattr_valid;
+	}
+	return p9_iattr_valid;
+}
+
+/**
+ * v9fs_vfs_setattr_dotl - set file metadata
+ * @dentry: file whose metadata to set
+ * @iattr: metadata assignment structure
+ *
+ */
+
+int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr)
+{
+	int retval;
+	struct p9_fid *fid;
+	struct p9_iattr_dotl p9attr;
+	struct inode *inode = dentry->d_inode;
+
+	p9_debug(P9_DEBUG_VFS, "\n");
+
+	retval = inode_change_ok(inode, iattr);
+	if (retval)
+		return retval;
+
+	p9attr.valid = v9fs_mapped_iattr_valid(iattr->ia_valid);
+	p9attr.mode = iattr->ia_mode;
+	p9attr.uid = iattr->ia_uid;
+	p9attr.gid = iattr->ia_gid;
+	p9attr.size = iattr->ia_size;
+	p9attr.atime_sec = iattr->ia_atime.tv_sec;
+	p9attr.atime_nsec = iattr->ia_atime.tv_nsec;
+	p9attr.mtime_sec = iattr->ia_mtime.tv_sec;
+	p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec;
+
+	fid = v9fs_fid_lookup(dentry);
+	if (IS_ERR(fid))
+		return PTR_ERR(fid);
+
+	/* Write all dirty data */
+	if (S_ISREG(inode->i_mode))
+		filemap_write_and_wait(inode->i_mapping);
+
+	retval = p9_client_setattr(fid, &p9attr);
+	if (retval < 0)
+		return retval;
+
+	if ((iattr->ia_valid & ATTR_SIZE) &&
+	    iattr->ia_size != i_size_read(inode))
+		truncate_setsize(inode, iattr->ia_size);
+
+	v9fs_invalidate_inode_attr(inode);
+	setattr_copy(inode, iattr);
+	mark_inode_dirty(inode);
+	if (iattr->ia_valid & ATTR_MODE) {
+		/* We also want to update ACL when we update mode bits */
+		retval = v9fs_acl_chmod(inode, fid);
+		if (retval < 0)
+			return retval;
+	}
+	return 0;
+}
+
+/**
+ * v9fs_stat2inode_dotl - populate an inode structure with stat info
+ * @stat: stat structure
+ * @inode: inode to populate
+ *
+ */
+
+void
+v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode)
+{
+	umode_t mode;
+	struct v9fs_inode *v9inode = V9FS_I(inode);
+
+	if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) {
+		inode->i_atime.tv_sec = stat->st_atime_sec;
+		inode->i_atime.tv_nsec = stat->st_atime_nsec;
+		inode->i_mtime.tv_sec = stat->st_mtime_sec;
+		inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
+		inode->i_ctime.tv_sec = stat->st_ctime_sec;
+		inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
+		inode->i_uid = stat->st_uid;
+		inode->i_gid = stat->st_gid;
+		set_nlink(inode, stat->st_nlink);
+
+		mode = stat->st_mode & S_IALLUGO;
+		mode |= inode->i_mode & ~S_IALLUGO;
+		inode->i_mode = mode;
+
+		i_size_write(inode, stat->st_size);
+		inode->i_blocks = stat->st_blocks;
+	} else {
+		if (stat->st_result_mask & P9_STATS_ATIME) {
+			inode->i_atime.tv_sec = stat->st_atime_sec;
+			inode->i_atime.tv_nsec = stat->st_atime_nsec;
+		}
+		if (stat->st_result_mask & P9_STATS_MTIME) {
+			inode->i_mtime.tv_sec = stat->st_mtime_sec;
+			inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
+		}
+		if (stat->st_result_mask & P9_STATS_CTIME) {
+			inode->i_ctime.tv_sec = stat->st_ctime_sec;
+			inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
+		}
+		if (stat->st_result_mask & P9_STATS_UID)
+			inode->i_uid = stat->st_uid;
+		if (stat->st_result_mask & P9_STATS_GID)
+			inode->i_gid = stat->st_gid;
+		if (stat->st_result_mask & P9_STATS_NLINK)
+			set_nlink(inode, stat->st_nlink);
+		if (stat->st_result_mask & P9_STATS_MODE) {
+			inode->i_mode = stat->st_mode;
+			if ((S_ISBLK(inode->i_mode)) ||
+						(S_ISCHR(inode->i_mode)))
+				init_special_inode(inode, inode->i_mode,
+								inode->i_rdev);
+		}
+		if (stat->st_result_mask & P9_STATS_RDEV)
+			inode->i_rdev = new_decode_dev(stat->st_rdev);
+		if (stat->st_result_mask & P9_STATS_SIZE)
+			i_size_write(inode, stat->st_size);
+		if (stat->st_result_mask & P9_STATS_BLOCKS)
+			inode->i_blocks = stat->st_blocks;
+	}
+	if (stat->st_result_mask & P9_STATS_GEN)
+		inode->i_generation = stat->st_gen;
+
+	/* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION
+	 * because the inode structure does not have fields for them.
+	 */
+	v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR;
+}
+
+static int
+v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry,
+		const char *symname)
+{
+	int err;
+	kgid_t gid;
+	char *name;
+	struct p9_qid qid;
+	struct inode *inode;
+	struct p9_fid *dfid;
+	struct p9_fid *fid = NULL;
+	struct v9fs_session_info *v9ses;
+
+	name = (char *) dentry->d_name.name;
+	p9_debug(P9_DEBUG_VFS, "%lu,%s,%s\n", dir->i_ino, name, symname);
+	v9ses = v9fs_inode2v9ses(dir);
+
+	dfid = v9fs_fid_lookup(dentry->d_parent);
+	if (IS_ERR(dfid)) {
+		err = PTR_ERR(dfid);
+		p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
+		return err;
+	}
+
+	gid = v9fs_get_fsgid_for_create(dir);
+
+	/* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */
+	err = p9_client_symlink(dfid, name, (char *)symname, gid, &qid);
+
+	if (err < 0) {
+		p9_debug(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err);
+		goto error;
+	}
+
+	v9fs_invalidate_inode_attr(dir);
+	if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
+		/* Now walk from the parent so we can get an unopened fid. */
+		fid = p9_client_walk(dfid, 1, &name, 1);
+		if (IS_ERR(fid)) {
+			err = PTR_ERR(fid);
+			p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
+				 err);
+			fid = NULL;
+			goto error;
+		}
+
+		/* instantiate inode and assign the unopened fid to dentry */
+		inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
+		if (IS_ERR(inode)) {
+			err = PTR_ERR(inode);
+			p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
+				 err);
+			goto error;
+		}
+		v9fs_fid_add(dentry, fid);
+		d_instantiate(dentry, inode);
+		fid = NULL;
+		err = 0;
+	} else {
+		/* Not in cached mode. No need to populate inode with stat */
+		inode = v9fs_get_inode(dir->i_sb, S_IFLNK, 0);
+		if (IS_ERR(inode)) {
+			err = PTR_ERR(inode);
+			goto error;
+		}
+		d_instantiate(dentry, inode);
+	}
+
+error:
+	if (fid)
+		p9_client_clunk(fid);
+
+	return err;
+}
+
+/**
+ * v9fs_vfs_link_dotl - create a hardlink for dotl
+ * @old_dentry: dentry for file to link to
+ * @dir: inode destination for new link
+ * @dentry: dentry for link
+ *
+ */
+
+static int
+v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
+		struct dentry *dentry)
+{
+	int err;
+	struct dentry *dir_dentry;
+	struct p9_fid *dfid, *oldfid;
+	struct v9fs_session_info *v9ses;
+
+	p9_debug(P9_DEBUG_VFS, "dir ino: %lu, old_name: %s, new_name: %s\n",
+		 dir->i_ino, old_dentry->d_name.name, dentry->d_name.name);
+
+	v9ses = v9fs_inode2v9ses(dir);
+	dir_dentry = dentry->d_parent;
+	dfid = v9fs_fid_lookup(dir_dentry);
+	if (IS_ERR(dfid))
+		return PTR_ERR(dfid);
+
+	oldfid = v9fs_fid_lookup(old_dentry);
+	if (IS_ERR(oldfid))
+		return PTR_ERR(oldfid);
+
+	err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name);
+
+	if (err < 0) {
+		p9_debug(P9_DEBUG_VFS, "p9_client_link failed %d\n", err);
+		return err;
+	}
+
+	v9fs_invalidate_inode_attr(dir);
+	if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
+		/* Get the latest stat info from server. */
+		struct p9_fid *fid;
+		fid = v9fs_fid_lookup(old_dentry);
+		if (IS_ERR(fid))
+			return PTR_ERR(fid);
+
+		v9fs_refresh_inode_dotl(fid, old_dentry->d_inode);
+	}
+	ihold(old_dentry->d_inode);
+	d_instantiate(dentry, old_dentry->d_inode);
+
+	return err;
+}
+
+/**
+ * v9fs_vfs_mknod_dotl - create a special file
+ * @dir: inode destination for new link
+ * @dentry: dentry for file
+ * @omode: mode for creation
+ * @rdev: device associated with special file
+ *
+ */
+static int
+v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
+		dev_t rdev)
+{
+	int err;
+	kgid_t gid;
+	char *name;
+	umode_t mode;
+	struct v9fs_session_info *v9ses;
+	struct p9_fid *fid = NULL, *dfid = NULL;
+	struct inode *inode;
+	struct p9_qid qid;
+	struct dentry *dir_dentry;
+	struct posix_acl *dacl = NULL, *pacl = NULL;
+
+	p9_debug(P9_DEBUG_VFS, " %lu,%s mode: %hx MAJOR: %u MINOR: %u\n",
+		 dir->i_ino, dentry->d_name.name, omode,
+		 MAJOR(rdev), MINOR(rdev));
+
+	if (!new_valid_dev(rdev))
+		return -EINVAL;
+
+	v9ses = v9fs_inode2v9ses(dir);
+	dir_dentry = dentry->d_parent;
+	dfid = v9fs_fid_lookup(dir_dentry);
+	if (IS_ERR(dfid)) {
+		err = PTR_ERR(dfid);
+		p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
+		dfid = NULL;
+		goto error;
+	}
+
+	gid = v9fs_get_fsgid_for_create(dir);
+	mode = omode;
+	/* Update mode based on ACL value */
+	err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
+	if (err) {
+		p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mknod %d\n",
+			 err);
+		goto error;
+	}
+	name = (char *) dentry->d_name.name;
+
+	err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid);
+	if (err < 0)
+		goto error;
+
+	v9fs_invalidate_inode_attr(dir);
+	fid = p9_client_walk(dfid, 1, &name, 1);
+	if (IS_ERR(fid)) {
+		err = PTR_ERR(fid);
+		p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
+			 err);
+		fid = NULL;
+		goto error;
+	}
+
+	/* instantiate inode and assign the unopened fid to the dentry */
+	if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
+		inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
+		if (IS_ERR(inode)) {
+			err = PTR_ERR(inode);
+			p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
+				 err);
+			goto error;
+		}
+		v9fs_set_create_acl(inode, fid, dacl, pacl);
+		v9fs_fid_add(dentry, fid);
+		d_instantiate(dentry, inode);
+		fid = NULL;
+		err = 0;
+	} else {
+		/*
+		 * Not in cached mode. No need to populate inode with stat.
+		 * socket syscall returns a fd, so we need instantiate
+		 */
+		inode = v9fs_get_inode(dir->i_sb, mode, rdev);
+		if (IS_ERR(inode)) {
+			err = PTR_ERR(inode);
+			goto error;
+		}
+		v9fs_set_create_acl(inode, fid, dacl, pacl);
+		d_instantiate(dentry, inode);
+	}
+error:
+	if (fid)
+		p9_client_clunk(fid);
+	v9fs_put_acl(dacl, pacl);
+	return err;
+}
+
+/**
+ * v9fs_vfs_follow_link_dotl - follow a symlink path
+ * @dentry: dentry for symlink
+ * @nd: nameidata
+ *
+ */
+
+static void *
+v9fs_vfs_follow_link_dotl(struct dentry *dentry, struct nameidata *nd)
+{
+	int retval;
+	struct p9_fid *fid;
+	char *link = __getname();
+	char *target;
+
+	p9_debug(P9_DEBUG_VFS, "%s\n", dentry->d_name.name);
+
+	if (!link) {
+		link = ERR_PTR(-ENOMEM);
+		goto ndset;
+	}
+	fid = v9fs_fid_lookup(dentry);
+	if (IS_ERR(fid)) {
+		__putname(link);
+		link = ERR_CAST(fid);
+		goto ndset;
+	}
+	retval = p9_client_readlink(fid, &target);
+	if (!retval) {
+		strcpy(link, target);
+		kfree(target);
+		goto ndset;
+	}
+	__putname(link);
+	link = ERR_PTR(retval);
+ndset:
+	nd_set_link(nd, link);
+	return NULL;
+}
+
+int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode)
+{
+	loff_t i_size;
+	struct p9_stat_dotl *st;
+	struct v9fs_session_info *v9ses;
+
+	v9ses = v9fs_inode2v9ses(inode);
+	st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
+	if (IS_ERR(st))
+		return PTR_ERR(st);
+	/*
+	 * Don't update inode if the file type is different
+	 */
+	if ((inode->i_mode & S_IFMT) != (st->st_mode & S_IFMT))
+		goto out;
+
+	spin_lock(&inode->i_lock);
+	/*
+	 * We don't want to refresh inode->i_size,
+	 * because we may have cached data
+	 */
+	i_size = inode->i_size;
+	v9fs_stat2inode_dotl(st, inode);
+	if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
+		inode->i_size = i_size;
+	spin_unlock(&inode->i_lock);
+out:
+	kfree(st);
+	return 0;
+}
+
+const struct inode_operations v9fs_dir_inode_operations_dotl = {
+	.create = v9fs_vfs_create_dotl,
+	.atomic_open = v9fs_vfs_atomic_open_dotl,
+	.lookup = v9fs_vfs_lookup,
+	.link = v9fs_vfs_link_dotl,
+	.symlink = v9fs_vfs_symlink_dotl,
+	.unlink = v9fs_vfs_unlink,
+	.mkdir = v9fs_vfs_mkdir_dotl,
+	.rmdir = v9fs_vfs_rmdir,
+	.mknod = v9fs_vfs_mknod_dotl,
+	.rename = v9fs_vfs_rename,
+	.getattr = v9fs_vfs_getattr_dotl,
+	.setattr = v9fs_vfs_setattr_dotl,
+	.setxattr = generic_setxattr,
+	.getxattr = generic_getxattr,
+	.removexattr = generic_removexattr,
+	.listxattr = v9fs_listxattr,
+	.get_acl = v9fs_iop_get_acl,
+};
+
+const struct inode_operations v9fs_file_inode_operations_dotl = {
+	.getattr = v9fs_vfs_getattr_dotl,
+	.setattr = v9fs_vfs_setattr_dotl,
+	.setxattr = generic_setxattr,
+	.getxattr = generic_getxattr,
+	.removexattr = generic_removexattr,
+	.listxattr = v9fs_listxattr,
+	.get_acl = v9fs_iop_get_acl,
+};
+
+const struct inode_operations v9fs_symlink_inode_operations_dotl = {
+	.readlink = generic_readlink,
+	.follow_link = v9fs_vfs_follow_link_dotl,
+	.put_link = v9fs_vfs_put_link,
+	.getattr = v9fs_vfs_getattr_dotl,
+	.setattr = v9fs_vfs_setattr_dotl,
+	.setxattr = generic_setxattr,
+	.getxattr = generic_getxattr,
+	.removexattr = generic_removexattr,
+	.listxattr = v9fs_listxattr,
+};
diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index 5f8ab8adb5f..0afd0382822 100644
--- a/fs/9p/vfs_super.c
+++ b/fs/9p/vfs_super.c
@@ -37,26 +37,19 @@
 #include <linux/mount.h>
 #include <linux/idr.h>
 #include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/statfs.h>
+#include <linux/magic.h>
 #include <net/9p/9p.h>
 #include <net/9p/client.h>
 
 #include "v9fs.h"
 #include "v9fs_vfs.h"
 #include "fid.h"
+#include "xattr.h"
+#include "acl.h"
 
-static void v9fs_clear_inode(struct inode *);
-static const struct super_operations v9fs_super_ops;
-
-/**
- * v9fs_clear_inode - release an inode
- * @inode: inode to release
- *
- */
-
-static void v9fs_clear_inode(struct inode *inode)
-{
-	filemap_fdatawrite(inode->i_mapping);
-}
+static const struct super_operations v9fs_super_ops, v9fs_super_ops_dotl;
 
 /**
  * v9fs_set_super - set the superblock
@@ -75,120 +68,148 @@ static int v9fs_set_super(struct super_block *s, void *data)
  * v9fs_fill_super - populate superblock with info
  * @sb: superblock
  * @v9ses: session information
- * @flags: flags propagated from v9fs_get_sb()
+ * @flags: flags propagated from v9fs_mount()
  *
  */
 
 static void
 v9fs_fill_super(struct super_block *sb, struct v9fs_session_info *v9ses,
-		int flags)
+		int flags, void *data)
 {
 	sb->s_maxbytes = MAX_LFS_FILESIZE;
 	sb->s_blocksize_bits = fls(v9ses->maxdata - 1);
 	sb->s_blocksize = 1 << sb->s_blocksize_bits;
 	sb->s_magic = V9FS_MAGIC;
-	sb->s_op = &v9fs_super_ops;
-
-	sb->s_flags = flags | MS_ACTIVE | MS_SYNCHRONOUS | MS_DIRSYNC |
-	    MS_NOATIME;
+	if (v9fs_proto_dotl(v9ses)) {
+		sb->s_op = &v9fs_super_ops_dotl;
+		sb->s_xattr = v9fs_xattr_handlers;
+	} else
+		sb->s_op = &v9fs_super_ops;
+	sb->s_bdi = &v9ses->bdi;
+	if (v9ses->cache)
+		sb->s_bdi->ra_pages = (VM_MAX_READAHEAD * 1024)/PAGE_CACHE_SIZE;
+
+	sb->s_flags |= MS_ACTIVE | MS_DIRSYNC | MS_NOATIME;
+	if (!v9ses->cache)
+		sb->s_flags |= MS_SYNCHRONOUS;
+
+#ifdef CONFIG_9P_FS_POSIX_ACL
+	if ((v9ses->flags & V9FS_ACL_MASK) == V9FS_POSIX_ACL)
+		sb->s_flags |= MS_POSIXACL;
+#endif
+
+	save_mount_options(sb, data);
 }
 
 /**
- * v9fs_get_sb - mount a superblock
+ * v9fs_mount - mount a superblock
  * @fs_type: file system type
  * @flags: mount flags
  * @dev_name: device name that was mounted
  * @data: mount options
- * @mnt: mountpoint record to be instantiated
  *
  */
 
-static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
-		       const char *dev_name, void *data,
-		       struct vfsmount *mnt)
+static struct dentry *v9fs_mount(struct file_system_type *fs_type, int flags,
+		       const char *dev_name, void *data)
 {
 	struct super_block *sb = NULL;
 	struct inode *inode = NULL;
 	struct dentry *root = NULL;
 	struct v9fs_session_info *v9ses = NULL;
-	struct p9_wstat *st = NULL;
-	int mode = S_IRWXUGO | S_ISVTX;
-	uid_t uid = current_fsuid();
-	gid_t gid = current_fsgid();
+	umode_t mode = S_IRWXUGO | S_ISVTX;
 	struct p9_fid *fid;
 	int retval = 0;
 
-	P9_DPRINTK(P9_DEBUG_VFS, " \n");
+	p9_debug(P9_DEBUG_VFS, "\n");
 
-	st = NULL;
 	v9ses = kzalloc(sizeof(struct v9fs_session_info), GFP_KERNEL);
 	if (!v9ses)
-		return -ENOMEM;
+		return ERR_PTR(-ENOMEM);
 
 	fid = v9fs_session_init(v9ses, dev_name, data);
 	if (IS_ERR(fid)) {
 		retval = PTR_ERR(fid);
+		/*
+		 * we need to call session_close to tear down some
+		 * of the data structure setup by session_init
+		 */
 		goto close_session;
 	}
 
-	st = p9_client_stat(fid);
-	if (IS_ERR(st)) {
-		retval = PTR_ERR(st);
-		goto clunk_fid;
-	}
-
-	sb = sget(fs_type, NULL, v9fs_set_super, v9ses);
+	sb = sget(fs_type, NULL, v9fs_set_super, flags, v9ses);
 	if (IS_ERR(sb)) {
 		retval = PTR_ERR(sb);
-		goto free_stat;
+		goto clunk_fid;
 	}
-	v9fs_fill_super(sb, v9ses, flags);
+	v9fs_fill_super(sb, v9ses, flags, data);
 
-	inode = v9fs_get_inode(sb, S_IFDIR | mode);
+	if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
+		sb->s_d_op = &v9fs_cached_dentry_operations;
+	else
+		sb->s_d_op = &v9fs_dentry_operations;
+
+	inode = v9fs_get_inode(sb, S_IFDIR | mode, 0);
 	if (IS_ERR(inode)) {
 		retval = PTR_ERR(inode);
 		goto release_sb;
 	}
 
-	inode->i_uid = uid;
-	inode->i_gid = gid;
-
-	root = d_alloc_root(inode);
+	root = d_make_root(inode);
 	if (!root) {
 		retval = -ENOMEM;
 		goto release_sb;
 	}
-
 	sb->s_root = root;
-	root->d_inode->i_ino = v9fs_qid2ino(&st->qid);
-
-	v9fs_stat2inode(st, root->d_inode, sb);
-
-	v9fs_fid_add(root, fid);
-	p9stat_free(st);
-	kfree(st);
-
-P9_DPRINTK(P9_DEBUG_VFS, " simple set mount, return 0\n");
-	simple_set_mnt(mnt, sb);
-	return 0;
-
-release_sb:
-	if (sb) {
-		up_write(&sb->s_umount);
-		deactivate_super(sb);
+	if (v9fs_proto_dotl(v9ses)) {
+		struct p9_stat_dotl *st = NULL;
+		st = p9_client_getattr_dotl(fid, P9_STATS_BASIC);
+		if (IS_ERR(st)) {
+			retval = PTR_ERR(st);
+			goto release_sb;
+		}
+		root->d_inode->i_ino = v9fs_qid2ino(&st->qid);
+		v9fs_stat2inode_dotl(st, root->d_inode);
+		kfree(st);
+	} else {
+		struct p9_wstat *st = NULL;
+		st = p9_client_stat(fid);
+		if (IS_ERR(st)) {
+			retval = PTR_ERR(st);
+			goto release_sb;
+		}
+
+		root->d_inode->i_ino = v9fs_qid2ino(&st->qid);
+		v9fs_stat2inode(st, root->d_inode, sb);
+
+		p9stat_free(st);
+		kfree(st);
 	}
+	retval = v9fs_get_acl(inode, fid);
+	if (retval)
+		goto release_sb;
+	v9fs_fid_add(root, fid);
 
-free_stat:
-	kfree(st);
+	p9_debug(P9_DEBUG_VFS, " simple set mount, return 0\n");
+	return dget(sb->s_root);
 
 clunk_fid:
 	p9_client_clunk(fid);
-
 close_session:
 	v9fs_session_close(v9ses);
 	kfree(v9ses);
+	return ERR_PTR(retval);
 
-	return retval;
+release_sb:
+	/*
+	 * we will do the session_close and root dentry release
+	 * in the below call. But we need to clunk fid, because we haven't
+	 * attached the fid to dentry so it won't get clunked
+	 * automatically.
+	 */
+	p9_client_clunk(fid);
+	deactivate_locked_super(sb);
+	return ERR_PTR(retval);
 }
 
 /**
@@ -201,50 +222,149 @@ static void v9fs_kill_super(struct super_block *s)
 {
 	struct v9fs_session_info *v9ses = s->s_fs_info;
 
-	P9_DPRINTK(P9_DEBUG_VFS, " %p\n", s);
-
-	v9fs_dentry_release(s->s_root);	/* clunk root */
+	p9_debug(P9_DEBUG_VFS, " %p\n", s);
 
 	kill_anon_super(s);
 
+	v9fs_session_cancel(v9ses);
 	v9fs_session_close(v9ses);
 	kfree(v9ses);
-	P9_DPRINTK(P9_DEBUG_VFS, "exiting kill_super\n");
+	s->s_fs_info = NULL;
+	p9_debug(P9_DEBUG_VFS, "exiting kill_super\n");
 }
 
-/**
- * v9fs_show_options - Show mount options in /proc/mounts
- * @m: seq_file to write to
- * @mnt: mount descriptor
- *
- */
+static void
+v9fs_umount_begin(struct super_block *sb)
+{
+	struct v9fs_session_info *v9ses;
+
+	v9ses = sb->s_fs_info;
+	v9fs_session_begin_cancel(v9ses);
+}
 
-static int v9fs_show_options(struct seq_file *m, struct vfsmount *mnt)
+static int v9fs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
-	struct v9fs_session_info *v9ses = mnt->mnt_sb->s_fs_info;
+	struct v9fs_session_info *v9ses;
+	struct p9_fid *fid;
+	struct p9_rstatfs rs;
+	int res;
 
-	seq_printf(m, "%s", v9ses->options);
-	return 0;
+	fid = v9fs_fid_lookup(dentry);
+	if (IS_ERR(fid)) {
+		res = PTR_ERR(fid);
+		goto done;
+	}
+
+	v9ses = v9fs_dentry2v9ses(dentry);
+	if (v9fs_proto_dotl(v9ses)) {
+		res = p9_client_statfs(fid, &rs);
+		if (res == 0) {
+			buf->f_type = rs.type;
+			buf->f_bsize = rs.bsize;
+			buf->f_blocks = rs.blocks;
+			buf->f_bfree = rs.bfree;
+			buf->f_bavail = rs.bavail;
+			buf->f_files = rs.files;
+			buf->f_ffree = rs.ffree;
+			buf->f_fsid.val[0] = rs.fsid & 0xFFFFFFFFUL;
+			buf->f_fsid.val[1] = (rs.fsid >> 32) & 0xFFFFFFFFUL;
+			buf->f_namelen = rs.namelen;
+		}
+		if (res != -ENOSYS)
+			goto done;
+	}
+	res = simple_statfs(dentry, buf);
+done:
+	return res;
 }
 
-static void
-v9fs_umount_begin(struct super_block *sb)
+static int v9fs_drop_inode(struct inode *inode)
 {
-	struct v9fs_session_info *v9ses = sb->s_fs_info;
+	struct v9fs_session_info *v9ses;
+	v9ses = v9fs_inode2v9ses(inode);
+	if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
+		return generic_drop_inode(inode);
+	/*
+	 * in case of non cached mode always drop the
+	 * the inode because we want the inode attribute
+	 * to always match that on the server.
+	 */
+	return 1;
+}
 
-	v9fs_session_cancel(v9ses);
+static int v9fs_write_inode(struct inode *inode,
+			    struct writeback_control *wbc)
+{
+	int ret;
+	struct p9_wstat wstat;
+	struct v9fs_inode *v9inode;
+	/*
+	 * send an fsync request to server irrespective of
+	 * wbc->sync_mode.
+	 */
+	p9_debug(P9_DEBUG_VFS, "%s: inode %p\n", __func__, inode);
+	v9inode = V9FS_I(inode);
+	if (!v9inode->writeback_fid)
+		return 0;
+	v9fs_blank_wstat(&wstat);
+
+	ret = p9_client_wstat(v9inode->writeback_fid, &wstat);
+	if (ret < 0) {
+		__mark_inode_dirty(inode, I_DIRTY_DATASYNC);
+		return ret;
+	}
+	return 0;
+}
+
+static int v9fs_write_inode_dotl(struct inode *inode,
+				 struct writeback_control *wbc)
+{
+	int ret;
+	struct v9fs_inode *v9inode;
+	/*
+	 * send an fsync request to server irrespective of
+	 * wbc->sync_mode.
+	 */
+	v9inode = V9FS_I(inode);
+	p9_debug(P9_DEBUG_VFS, "%s: inode %p, writeback_fid %p\n",
+		 __func__, inode, v9inode->writeback_fid);
+	if (!v9inode->writeback_fid)
+		return 0;
+
+	ret = p9_client_fsync(v9inode->writeback_fid, 0);
+	if (ret < 0) {
+		__mark_inode_dirty(inode, I_DIRTY_DATASYNC);
+		return ret;
+	}
+	return 0;
 }
 
 static const struct super_operations v9fs_super_ops = {
+	.alloc_inode = v9fs_alloc_inode,
+	.destroy_inode = v9fs_destroy_inode,
 	.statfs = simple_statfs,
-	.clear_inode = v9fs_clear_inode,
-	.show_options = v9fs_show_options,
+	.evict_inode = v9fs_evict_inode,
+	.show_options = generic_show_options,
+	.umount_begin = v9fs_umount_begin,
+	.write_inode = v9fs_write_inode,
+};
+
+static const struct super_operations v9fs_super_ops_dotl = {
+	.alloc_inode = v9fs_alloc_inode,
+	.destroy_inode = v9fs_destroy_inode,
+	.statfs = v9fs_statfs,
+	.drop_inode = v9fs_drop_inode,
+	.evict_inode = v9fs_evict_inode,
+	.show_options = generic_show_options,
 	.umount_begin = v9fs_umount_begin,
+	.write_inode = v9fs_write_inode_dotl,
 };
 
 struct file_system_type v9fs_fs_type = {
 	.name = "9p",
-	.get_sb = v9fs_get_sb,
+	.mount = v9fs_mount,
 	.kill_sb = v9fs_kill_super,
 	.owner = THIS_MODULE,
+	.fs_flags = FS_RENAME_DOES_D_MOVE,
 };
+MODULE_ALIAS_FS("9p");
diff --git a/fs/9p/xattr.c b/fs/9p/xattr.c
new file mode 100644
index 00000000000..f95e01e058e
--- /dev/null
+++ b/fs/9p/xattr.c
@@ -0,0 +1,181 @@
+/*
+ * Copyright IBM Corporation, 2010
+ * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2.1 of the GNU Lesser General Public License
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/sched.h>
+#include <net/9p/9p.h>
+#include <net/9p/client.h>
+
+#include "fid.h"
+#include "xattr.h"
+
+ssize_t v9fs_fid_xattr_get(struct p9_fid *fid, const char *name,
+			   void *buffer, size_t buffer_size)
+{
+	ssize_t retval;
+	int msize, read_count;
+	u64 offset = 0, attr_size;
+	struct p9_fid *attr_fid;
+
+	attr_fid = p9_client_xattrwalk(fid, name, &attr_size);
+	if (IS_ERR(attr_fid)) {
+		retval = PTR_ERR(attr_fid);
+		p9_debug(P9_DEBUG_VFS, "p9_client_attrwalk failed %zd\n",
+			 retval);
+		attr_fid = NULL;
+		goto error;
+	}
+	if (!buffer_size) {
+		/* request to get the attr_size */
+		retval = attr_size;
+		goto error;
+	}
+	if (attr_size > buffer_size) {
+		retval = -ERANGE;
+		goto error;
+	}
+	msize = attr_fid->clnt->msize;
+	while (attr_size) {
+		if (attr_size > (msize - P9_IOHDRSZ))
+			read_count = msize - P9_IOHDRSZ;
+		else
+			read_count = attr_size;
+		read_count = p9_client_read(attr_fid, ((char *)buffer)+offset,
+					NULL, offset, read_count);
+		if (read_count < 0) {
+			/* error in xattr read */
+			retval = read_count;
+			goto error;
+		}
+		offset += read_count;
+		attr_size -= read_count;
+	}
+	/* Total read xattr bytes */
+	retval = offset;
+error:
+	if (attr_fid)
+		p9_client_clunk(attr_fid);
+	return retval;
+
+}
+
+
+/*
+ * v9fs_xattr_get()
+ *
+ * Copy an extended attribute into the buffer
+ * provided, or compute the buffer size required.
+ * Buffer is NULL to compute the size of the buffer required.
+ *
+ * Returns a negative error number on failure, or the number of bytes
+ * used / required on success.
+ */
+ssize_t v9fs_xattr_get(struct dentry *dentry, const char *name,
+		       void *buffer, size_t buffer_size)
+{
+	struct p9_fid *fid;
+
+	p9_debug(P9_DEBUG_VFS, "name = %s value_len = %zu\n",
+		 name, buffer_size);
+	fid = v9fs_fid_lookup(dentry);
+	if (IS_ERR(fid))
+		return PTR_ERR(fid);
+
+	return v9fs_fid_xattr_get(fid, name, buffer, buffer_size);
+}
+
+/*
+ * v9fs_xattr_set()
+ *
+ * Create, replace or remove an extended attribute for this inode. Buffer
+ * is NULL to remove an existing extended attribute, and non-NULL to
+ * either replace an existing extended attribute, or create a new extended
+ * attribute. The flags XATTR_REPLACE and XATTR_CREATE
+ * specify that an extended attribute must exist and must not exist
+ * previous to the call, respectively.
+ *
+ * Returns 0, or a negative error number on failure.
+ */
+int v9fs_xattr_set(struct dentry *dentry, const char *name,
+		   const void *value, size_t value_len, int flags)
+{
+	struct p9_fid *fid = v9fs_fid_lookup(dentry);
+	if (IS_ERR(fid))
+		return PTR_ERR(fid);
+	return v9fs_fid_xattr_set(fid, name, value, value_len, flags);
+}
+
+int v9fs_fid_xattr_set(struct p9_fid *fid, const char *name,
+		   const void *value, size_t value_len, int flags)
+{
+	u64 offset = 0;
+	int retval, msize, write_count;
+
+	p9_debug(P9_DEBUG_VFS, "name = %s value_len = %zu flags = %d\n",
+		 name, value_len, flags);
+
+	/* Clone it */
+	fid = p9_client_walk(fid, 0, NULL, 1);
+	if (IS_ERR(fid))
+		return PTR_ERR(fid);
+
+	/*
+	 * On success fid points to xattr
+	 */
+	retval = p9_client_xattrcreate(fid, name, value_len, flags);
+	if (retval < 0) {
+		p9_debug(P9_DEBUG_VFS, "p9_client_xattrcreate failed %d\n",
+			 retval);
+		goto err;
+	}
+	msize = fid->clnt->msize;
+	while (value_len) {
+		if (value_len > (msize - P9_IOHDRSZ))
+			write_count = msize - P9_IOHDRSZ;
+		else
+			write_count = value_len;
+		write_count = p9_client_write(fid, ((char *)value)+offset,
+					NULL, offset, write_count);
+		if (write_count < 0) {
+			/* error in xattr write */
+			retval = write_count;
+			goto err;
+		}
+		offset += write_count;
+		value_len -= write_count;
+	}
+	retval = 0;
+err:
+	p9_client_clunk(fid);
+	return retval;
+}
+
+ssize_t v9fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
+{
+	return v9fs_xattr_get(dentry, NULL, buffer, buffer_size);
+}
+
+const struct xattr_handler *v9fs_xattr_handlers[] = {
+	&v9fs_xattr_user_handler,
+	&v9fs_xattr_trusted_handler,
+#ifdef CONFIG_9P_FS_POSIX_ACL
+	&v9fs_xattr_acl_access_handler,
+	&v9fs_xattr_acl_default_handler,
+#endif
+#ifdef CONFIG_9P_FS_SECURITY
+	&v9fs_xattr_security_handler,
+#endif
+	NULL
+};
diff --git a/fs/9p/xattr.h b/fs/9p/xattr.h
new file mode 100644
index 00000000000..d3e2ea3840b
--- /dev/null
+++ b/fs/9p/xattr.h
@@ -0,0 +1,37 @@
+/*
+ * Copyright IBM Corporation, 2010
+ * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2.1 of the GNU Lesser General Public License
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ */
+#ifndef FS_9P_XATTR_H
+#define FS_9P_XATTR_H
+
+#include <linux/xattr.h>
+#include <net/9p/9p.h>
+#include <net/9p/client.h>
+
+extern const struct xattr_handler *v9fs_xattr_handlers[];
+extern struct xattr_handler v9fs_xattr_user_handler;
+extern struct xattr_handler v9fs_xattr_trusted_handler;
+extern struct xattr_handler v9fs_xattr_security_handler;
+extern const struct xattr_handler v9fs_xattr_acl_access_handler;
+extern const struct xattr_handler v9fs_xattr_acl_default_handler;
+
+extern ssize_t v9fs_fid_xattr_get(struct p9_fid *, const char *,
+				  void *, size_t);
+extern ssize_t v9fs_xattr_get(struct dentry *, const char *,
+			      void *, size_t);
+extern int v9fs_fid_xattr_set(struct p9_fid *, const char *,
+			  const void *, size_t, int);
+extern int v9fs_xattr_set(struct dentry *, const char *,
+			  const void *, size_t, int);
+extern ssize_t v9fs_listxattr(struct dentry *, char *, size_t);
+#endif /* FS_9P_XATTR_H */
diff --git a/fs/9p/xattr_security.c b/fs/9p/xattr_security.c
new file mode 100644
index 00000000000..cb247a142a6
--- /dev/null
+++ b/fs/9p/xattr_security.c
@@ -0,0 +1,80 @@
+/*
+ * Copyright IBM Corporation, 2010
+ * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2.1 of the GNU Lesser General Public License
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ */
+
+
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/fs.h>
+#include <linux/slab.h>
+#include "xattr.h"
+
+static int v9fs_xattr_security_get(struct dentry *dentry, const char *name,
+			void *buffer, size_t size, int type)
+{
+	int retval;
+	char *full_name;
+	size_t name_len;
+	size_t prefix_len = XATTR_SECURITY_PREFIX_LEN;
+
+	if (name == NULL)
+		return -EINVAL;
+
+	if (strcmp(name, "") == 0)
+		return -EINVAL;
+
+	name_len = strlen(name);
+	full_name = kmalloc(prefix_len + name_len + 1 , GFP_KERNEL);
+	if (!full_name)
+		return -ENOMEM;
+	memcpy(full_name, XATTR_SECURITY_PREFIX, prefix_len);
+	memcpy(full_name+prefix_len, name, name_len);
+	full_name[prefix_len + name_len] = '\0';
+
+	retval = v9fs_xattr_get(dentry, full_name, buffer, size);
+	kfree(full_name);
+	return retval;
+}
+
+static int v9fs_xattr_security_set(struct dentry *dentry, const char *name,
+			const void *value, size_t size, int flags, int type)
+{
+	int retval;
+	char *full_name;
+	size_t name_len;
+	size_t prefix_len = XATTR_SECURITY_PREFIX_LEN;
+
+	if (name == NULL)
+		return -EINVAL;
+
+	if (strcmp(name, "") == 0)
+		return -EINVAL;
+
+	name_len = strlen(name);
+	full_name = kmalloc(prefix_len + name_len + 1 , GFP_KERNEL);
+	if (!full_name)
+		return -ENOMEM;
+	memcpy(full_name, XATTR_SECURITY_PREFIX, prefix_len);
+	memcpy(full_name + prefix_len, name, name_len);
+	full_name[prefix_len + name_len] = '\0';
+
+	retval = v9fs_xattr_set(dentry, full_name, value, size, flags);
+	kfree(full_name);
+	return retval;
+}
+
+struct xattr_handler v9fs_xattr_security_handler = {
+	.prefix	= XATTR_SECURITY_PREFIX,
+	.get	= v9fs_xattr_security_get,
+	.set	= v9fs_xattr_security_set,
+};
diff --git a/fs/9p/xattr_trusted.c b/fs/9p/xattr_trusted.c
new file mode 100644
index 00000000000..e30d33b8a3f
--- /dev/null
+++ b/fs/9p/xattr_trusted.c
@@ -0,0 +1,80 @@
+/*
+ * Copyright IBM Corporation, 2010
+ * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2.1 of the GNU Lesser General Public License
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ */
+
+
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/fs.h>
+#include <linux/slab.h>
+#include "xattr.h"
+
+static int v9fs_xattr_trusted_get(struct dentry *dentry, const char *name,
+			void *buffer, size_t size, int type)
+{
+	int retval;
+	char *full_name;
+	size_t name_len;
+	size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN;
+
+	if (name == NULL)
+		return -EINVAL;
+
+	if (strcmp(name, "") == 0)
+		return -EINVAL;
+
+	name_len = strlen(name);
+	full_name = kmalloc(prefix_len + name_len + 1 , GFP_KERNEL);
+	if (!full_name)
+		return -ENOMEM;
+	memcpy(full_name, XATTR_TRUSTED_PREFIX, prefix_len);
+	memcpy(full_name+prefix_len, name, name_len);
+	full_name[prefix_len + name_len] = '\0';
+
+	retval = v9fs_xattr_get(dentry, full_name, buffer, size);
+	kfree(full_name);
+	return retval;
+}
+
+static int v9fs_xattr_trusted_set(struct dentry *dentry, const char *name,
+			const void *value, size_t size, int flags, int type)
+{
+	int retval;
+	char *full_name;
+	size_t name_len;
+	size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN;
+
+	if (name == NULL)
+		return -EINVAL;
+
+	if (strcmp(name, "") == 0)
+		return -EINVAL;
+
+	name_len = strlen(name);
+	full_name = kmalloc(prefix_len + name_len + 1 , GFP_KERNEL);
+	if (!full_name)
+		return -ENOMEM;
+	memcpy(full_name, XATTR_TRUSTED_PREFIX, prefix_len);
+	memcpy(full_name + prefix_len, name, name_len);
+	full_name[prefix_len + name_len] = '\0';
+
+	retval = v9fs_xattr_set(dentry, full_name, value, size, flags);
+	kfree(full_name);
+	return retval;
+}
+
+struct xattr_handler v9fs_xattr_trusted_handler = {
+	.prefix	= XATTR_TRUSTED_PREFIX,
+	.get	= v9fs_xattr_trusted_get,
+	.set	= v9fs_xattr_trusted_set,
+};
diff --git a/fs/9p/xattr_user.c b/fs/9p/xattr_user.c
new file mode 100644
index 00000000000..d0b701b7208
--- /dev/null
+++ b/fs/9p/xattr_user.c
@@ -0,0 +1,80 @@
+/*
+ * Copyright IBM Corporation, 2010
+ * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2.1 of the GNU Lesser General Public License
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ */
+
+
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/fs.h>
+#include <linux/slab.h>
+#include "xattr.h"
+
+static int v9fs_xattr_user_get(struct dentry *dentry, const char *name,
+			void *buffer, size_t size, int type)
+{
+	int retval;
+	char *full_name;
+	size_t name_len;
+	size_t prefix_len = XATTR_USER_PREFIX_LEN;
+
+	if (name == NULL)
+		return -EINVAL;
+
+	if (strcmp(name, "") == 0)
+		return -EINVAL;
+
+	name_len = strlen(name);
+	full_name = kmalloc(prefix_len + name_len + 1 , GFP_KERNEL);
+	if (!full_name)
+		return -ENOMEM;
+	memcpy(full_name, XATTR_USER_PREFIX, prefix_len);
+	memcpy(full_name+prefix_len, name, name_len);
+	full_name[prefix_len + name_len] = '\0';
+
+	retval = v9fs_xattr_get(dentry, full_name, buffer, size);
+	kfree(full_name);
+	return retval;
+}
+
+static int v9fs_xattr_user_set(struct dentry *dentry, const char *name,
+			const void *value, size_t size, int flags, int type)
+{
+	int retval;
+	char *full_name;
+	size_t name_len;
+	size_t prefix_len = XATTR_USER_PREFIX_LEN;
+
+	if (name == NULL)
+		return -EINVAL;
+
+	if (strcmp(name, "") == 0)
+		return -EINVAL;
+
+	name_len = strlen(name);
+	full_name = kmalloc(prefix_len + name_len + 1 , GFP_KERNEL);
+	if (!full_name)
+		return -ENOMEM;
+	memcpy(full_name, XATTR_USER_PREFIX, prefix_len);
+	memcpy(full_name + prefix_len, name, name_len);
+	full_name[prefix_len + name_len] = '\0';
+
+	retval = v9fs_xattr_set(dentry, full_name, value, size, flags);
+	kfree(full_name);
+	return retval;
+}
+
+struct xattr_handler v9fs_xattr_user_handler = {
+	.prefix	= XATTR_USER_PREFIX,
+	.get	= v9fs_xattr_user_get,
+	.set	= v9fs_xattr_user_set,
+};
diff --git a/fs/Kconfig b/fs/Kconfig
index 9f7270f36b2..312393f3294 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -4,6 +4,10 @@
 
 menu "File systems"
 
+# Use unaligned word dcache accesses
+config DCACHE_WORD_ACCESS
+       bool
+
 if BLOCK
 
 source "fs/ext2/Kconfig"
@@ -24,48 +28,46 @@ config FS_MBCACHE
 	tristate
 	default y if EXT2_FS=y && EXT2_FS_XATTR
 	default y if EXT3_FS=y && EXT3_FS_XATTR
-	default y if EXT4_FS=y && EXT4_FS_XATTR
-	default m if EXT2_FS_XATTR || EXT3_FS_XATTR || EXT4_FS_XATTR
+	default y if EXT4_FS=y
+	default m if EXT2_FS_XATTR || EXT3_FS_XATTR || EXT4_FS
 
 source "fs/reiserfs/Kconfig"
 source "fs/jfs/Kconfig"
 
-config FS_POSIX_ACL
-# Posix ACL utility routines (for now, only ext2/ext3/jfs/reiserfs/nfs4)
+source "fs/xfs/Kconfig"
+source "fs/gfs2/Kconfig"
+source "fs/ocfs2/Kconfig"
+source "fs/btrfs/Kconfig"
+source "fs/nilfs2/Kconfig"
+
+endif # BLOCK
+
+# Posix ACL utility routines
 #
-# NOTE: you can implement Posix ACLs without these helpers (XFS does).
-# 	Never use this symbol for ifdefs.
+# Note: Posix ACLs can be implemented without these helpers.  Never use
+# this symbol for ifdefs in core code.
 #
-	bool
-	default n
+config FS_POSIX_ACL
+	def_bool n
+
+config EXPORTFS
+	tristate
 
 config FILE_LOCKING
-	bool "Enable POSIX file locking API" if EMBEDDED
+	bool "Enable POSIX file locking API" if EXPERT
 	default y
 	help
 	  This option enables standard file locking support, required
           for filesystems like NFS and for the flock() system
           call. Disabling this option saves about 11k.
 
-source "fs/xfs/Kconfig"
-source "fs/gfs2/Kconfig"
-source "fs/ocfs2/Kconfig"
-source "fs/btrfs/Kconfig"
-
-endif # BLOCK
-
 source "fs/notify/Kconfig"
 
 source "fs/quota/Kconfig"
 
-source "fs/autofs/Kconfig"
 source "fs/autofs4/Kconfig"
 source "fs/fuse/Kconfig"
 
-config GENERIC_ACL
-	bool
-	select FS_POSIX_ACL
-
 menu "Caches"
 
 source "fs/fscache/Kconfig"
@@ -94,10 +96,12 @@ endif # BLOCK
 menu "Pseudo filesystems"
 
 source "fs/proc/Kconfig"
+source "fs/kernfs/Kconfig"
 source "fs/sysfs/Kconfig"
 
 config TMPFS
-	bool "Virtual memory file system support (former shm fs)"
+	bool "Tmpfs virtual memory file system support (former shm fs)"
+	depends on SHMEM
 	help
 	  Tmpfs is a file system which keeps all files in virtual memory.
 
@@ -111,20 +115,44 @@ config TMPFS
 config TMPFS_POSIX_ACL
 	bool "Tmpfs POSIX Access Control Lists"
 	depends on TMPFS
-	select GENERIC_ACL
+	select TMPFS_XATTR
+	select FS_POSIX_ACL
 	help
-	  POSIX Access Control Lists (ACLs) support permissions for users and
-	  groups beyond the owner/group/world scheme.
+	  POSIX Access Control Lists (ACLs) support additional access rights
+	  for users and groups beyond the standard owner/group/world scheme,
+	  and this option selects support for ACLs specifically for tmpfs
+	  filesystems.
+
+	  If you've selected TMPFS, it's possible that you'll also need
+	  this option as there are a number of Linux distros that require
+	  POSIX ACL support under /dev for certain features to work properly.
+	  For example, some distros need this feature for ALSA-related /dev
+	  files for sound to work properly.  In short, if you're not sure,
+	  say Y.
 
 	  To learn more about Access Control Lists, visit the POSIX ACLs for
 	  Linux website <http://acl.bestbits.at/>.
 
-	  If you don't know what Access Control Lists are, say N.
+config TMPFS_XATTR
+	bool "Tmpfs extended attributes"
+	depends on TMPFS
+	default n
+	help
+	  Extended attributes are name:value pairs associated with inodes by
+	  the kernel or by users (see the attr(5) manual page, or visit
+	  <http://acl.bestbits.at/> for details).
+
+	  Currently this enables support for the trusted.* and
+	  security.* namespaces.
+
+	  You need this for POSIX ACL support on tmpfs.
+
+	  If unsure, say N.
 
 config HUGETLBFS
 	bool "HugeTLB file system support"
-	depends on X86 || IA64 || PPC64 || SPARC64 || (SUPERH && MMU) || \
-		   (S390 && 64BIT) || BROKEN
+	depends on X86 || IA64 || SPARC64 || (S390 && 64BIT) || \
+		   SYS_SUPPORTS_HUGETLBFS || BROKEN
 	help
 	  hugetlbfs is a filesystem backing for HugeTLB pages, based on
 	  ramfs. For architectures that support it, say Y here and read
@@ -165,6 +193,7 @@ source "fs/efs/Kconfig"
 source "fs/jffs2/Kconfig"
 # UBIFS File system configuration
 source "fs/ubifs/Kconfig"
+source "fs/logfs/Kconfig"
 source "fs/cramfs/Kconfig"
 source "fs/squashfs/Kconfig"
 source "fs/freevxfs/Kconfig"
@@ -172,39 +201,19 @@ source "fs/minix/Kconfig"
 source "fs/omfs/Kconfig"
 source "fs/hpfs/Kconfig"
 source "fs/qnx4/Kconfig"
+source "fs/qnx6/Kconfig"
 source "fs/romfs/Kconfig"
+source "fs/pstore/Kconfig"
 source "fs/sysv/Kconfig"
 source "fs/ufs/Kconfig"
 source "fs/exofs/Kconfig"
-
-config NILFS2_FS
-	tristate "NILFS2 file system support (EXPERIMENTAL)"
-	depends on BLOCK && EXPERIMENTAL
-	select CRC32
-	help
-	  NILFS2 is a log-structured file system (LFS) supporting continuous
-	  snapshotting.  In addition to versioning capability of the entire
-	  file system, users can even restore files mistakenly overwritten or
-	  destroyed just a few seconds ago.  Since this file system can keep
-	  consistency like conventional LFS, it achieves quick recovery after
-	  system crashes.
-
-	  NILFS2 creates a number of checkpoints every few seconds or per
-	  synchronous write basis (unless there is no change).  Users can
-	  select significant versions among continuously created checkpoints,
-	  and can change them into snapshots which will be preserved for long
-	  periods until they are changed back to checkpoints.  Each
-	  snapshot is mountable as a read-only file system concurrently with
-	  its writable mount, and this feature is convenient for online backup.
-
-	  Some features including atime, extended attributes, and POSIX ACLs,
-	  are not supported yet.
-
-	  To compile this file system support as a module, choose M here: the
-	  module will be called nilfs2.  If unsure, say N.
+source "fs/f2fs/Kconfig"
+source "fs/efivarfs/Kconfig"
 
 endif # MISC_FILESYSTEMS
 
+source "fs/exofs/Kconfig.ore"
+
 menuconfig NETWORK_FILESYSTEMS
 	bool "Network File Systems"
 	default y
@@ -226,15 +235,14 @@ source "fs/nfsd/Kconfig"
 
 config LOCKD
 	tristate
+	depends on FILE_LOCKING
 
 config LOCKD_V4
 	bool
 	depends on NFSD_V3 || NFS_V3
+	depends on FILE_LOCKING
 	default y
 
-config EXPORTFS
-	tristate
-
 config NFS_ACL_SUPPORT
 	tristate
 	select FS_POSIX_ACL
@@ -245,7 +253,7 @@ config NFS_COMMON
 	default y
 
 source "net/sunrpc/Kconfig"
-source "fs/smbfs/Kconfig"
+source "fs/ceph/Kconfig"
 source "fs/cifs/Kconfig"
 source "fs/ncpfs/Kconfig"
 source "fs/coda/Kconfig"
@@ -254,14 +262,6 @@ source "fs/9p/Kconfig"
 
 endif # NETWORK_FILESYSTEMS
 
-if BLOCK
-menu "Partition Types"
-
-source "fs/partitions/Kconfig"
-
-endmenu
-endif
-
 source "fs/nls/Kconfig"
 source "fs/dlm/Kconfig"
 
diff --git a/fs/Kconfig.binfmt b/fs/Kconfig.binfmt
index bb4cc5b8abc..370b24cee4d 100644
--- a/fs/Kconfig.binfmt
+++ b/fs/Kconfig.binfmt
@@ -27,10 +27,13 @@ config COMPAT_BINFMT_ELF
 	bool
 	depends on COMPAT && BINFMT_ELF
 
+config ARCH_BINFMT_ELF_RANDOMIZE_PIE
+	bool
+
 config BINFMT_ELF_FDPIC
 	bool "Kernel support for FDPIC ELF binaries"
 	default y
-	depends on (FRV || BLACKFIN || (SUPERH32 && !MMU))
+	depends on (FRV || BLACKFIN || (SUPERH32 && !MMU) || C6X)
 	help
 	  ELF FDPIC binaries are based on ELF, but allow the individual load
 	  segments of a binary to be located in memory independently of each
@@ -42,7 +45,7 @@ config BINFMT_ELF_FDPIC
 
 config CORE_DUMP_DEFAULT_ELF_HEADERS
 	bool "Write ELF core dumps with partial segments"
-	default n
+	default y
 	depends on BINFMT_ELF && ELF_CORE
 	help
 	  ELF core dump files describe each memory mapping of the crashed
@@ -60,7 +63,21 @@ config CORE_DUMP_DEFAULT_ELF_HEADERS
 	  inherited.  See Documentation/filesystems/proc.txt for details.
 
 	  This config option changes the default setting of coredump_filter
-	  seen at boot time.  If unsure, say N.
+	  seen at boot time.  If unsure, say Y.
+
+config BINFMT_SCRIPT
+	tristate "Kernel support for scripts starting with #!"
+	default y
+	help
+	  Say Y here if you want to execute interpreted scripts starting with
+	  #! followed by the path to an interpreter.
+
+	  You can build this support as a module; however, until that module
+	  gets loaded, you cannot run scripts.  Thus, if you want to load this
+	  module from an initramfs, the portion of the initramfs before loading
+	  this module must consist of compiled binaries only.
+
+	  Most systems will not boot if you say M or N here.  If unsure, say Y.
 
 config BINFMT_FLAT
 	bool "Kernel support for flat binaries"
@@ -161,3 +178,11 @@ config BINFMT_MISC
 	  You may say M here for module support and later load the module when
 	  you have use for it; the module is called binfmt_misc. If you
 	  don't know what to answer at this point, say Y.
+
+config COREDUMP
+	bool "Enable core dump support" if EXPERT
+	default y
+	help
+	  This option enables support for performing core dumps. You almost
+	  certainly want to say Y here. Not necessary on systems that never
+	  need debugging or only ever run flawless code.
diff --git a/fs/Makefile b/fs/Makefile
index af6d04700d9..4030cbfbc9a 100644
--- a/fs/Makefile
+++ b/fs/Makefile
@@ -7,19 +7,20 @@
 
 obj-y :=	open.o read_write.o file_table.o super.o \
 		char_dev.o stat.o exec.o pipe.o namei.o fcntl.o \
-		ioctl.o readdir.o select.o fifo.o dcache.o inode.o \
+		ioctl.o readdir.o select.o dcache.o inode.o \
 		attr.o bad_inode.o file.o filesystems.o namespace.o \
 		seq_file.o xattr.o libfs.o fs-writeback.o \
-		pnode.o drop_caches.o splice.o sync.o utimes.o \
-		stack.o fs_struct.o
+		pnode.o splice.o sync.o utimes.o \
+		stack.o fs_struct.o statfs.o
 
 ifeq ($(CONFIG_BLOCK),y)
-obj-y +=	buffer.o bio.o block_dev.o direct-io.o mpage.o ioprio.o
+obj-y +=	buffer.o block_dev.o direct-io.o mpage.o
 else
 obj-y +=	no-block.o
 endif
 
-obj-$(CONFIG_BLK_DEV_INTEGRITY) += bio-integrity.o
+obj-$(CONFIG_PROC_FS) += proc_namespace.o
+
 obj-y				+= notify/
 obj-$(CONFIG_EPOLL)		+= eventpoll.o
 obj-$(CONFIG_ANON_INODES)	+= anon_inodes.o
@@ -29,17 +30,10 @@ obj-$(CONFIG_EVENTFD)		+= eventfd.o
 obj-$(CONFIG_AIO)               += aio.o
 obj-$(CONFIG_FILE_LOCKING)      += locks.o
 obj-$(CONFIG_COMPAT)		+= compat.o compat_ioctl.o
-
-nfsd-$(CONFIG_NFSD)		:= nfsctl.o
-obj-y				+= $(nfsd-y) $(nfsd-m)
-
 obj-$(CONFIG_BINFMT_AOUT)	+= binfmt_aout.o
 obj-$(CONFIG_BINFMT_EM86)	+= binfmt_em86.o
 obj-$(CONFIG_BINFMT_MISC)	+= binfmt_misc.o
-
-# binfmt_script is always there
-obj-y				+= binfmt_script.o
-
+obj-$(CONFIG_BINFMT_SCRIPT)	+= binfmt_script.o
 obj-$(CONFIG_BINFMT_ELF)	+= binfmt_elf.o
 obj-$(CONFIG_COMPAT_BINFMT_ELF)	+= compat_binfmt_elf.o
 obj-$(CONFIG_BINFMT_ELF_FDPIC)	+= binfmt_elf_fdpic.o
@@ -47,14 +41,17 @@ obj-$(CONFIG_BINFMT_SOM)	+= binfmt_som.o
 obj-$(CONFIG_BINFMT_FLAT)	+= binfmt_flat.o
 
 obj-$(CONFIG_FS_MBCACHE)	+= mbcache.o
-obj-$(CONFIG_FS_POSIX_ACL)	+= posix_acl.o xattr_acl.o
+obj-$(CONFIG_FS_POSIX_ACL)	+= posix_acl.o
 obj-$(CONFIG_NFS_COMMON)	+= nfs_common/
-obj-$(CONFIG_GENERIC_ACL)	+= generic_acl.o
+obj-$(CONFIG_COREDUMP)		+= coredump.o
+obj-$(CONFIG_SYSCTL)		+= drop_caches.o
+
+obj-$(CONFIG_FHANDLE)		+= fhandle.o
 
 obj-y				+= quota/
 
 obj-$(CONFIG_PROC_FS)		+= proc/
-obj-y				+= partitions/
+obj-$(CONFIG_KERNFS)		+= kernfs/
 obj-$(CONFIG_SYSFS)		+= sysfs/
 obj-$(CONFIG_CONFIGFS_FS)	+= configfs/
 obj-y				+= devpts/
@@ -91,7 +88,6 @@ obj-$(CONFIG_NFSD)		+= nfsd/
 obj-$(CONFIG_LOCKD)		+= lockd/
 obj-$(CONFIG_NLS)		+= nls/
 obj-$(CONFIG_SYSV_FS)		+= sysv/
-obj-$(CONFIG_SMB_FS)		+= smbfs/
 obj-$(CONFIG_CIFS)		+= cifs/
 obj-$(CONFIG_NCP_FS)		+= ncpfs/
 obj-$(CONFIG_HPFS_FS)		+= hpfs/
@@ -99,11 +95,12 @@ obj-$(CONFIG_NTFS_FS)		+= ntfs/
 obj-$(CONFIG_UFS_FS)		+= ufs/
 obj-$(CONFIG_EFS_FS)		+= efs/
 obj-$(CONFIG_JFFS2_FS)		+= jffs2/
+obj-$(CONFIG_LOGFS)		+= logfs/
 obj-$(CONFIG_UBIFS_FS)		+= ubifs/
 obj-$(CONFIG_AFFS_FS)		+= affs/
 obj-$(CONFIG_ROMFS_FS)		+= romfs/
 obj-$(CONFIG_QNX4FS_FS)		+= qnx4/
-obj-$(CONFIG_AUTOFS_FS)		+= autofs/
+obj-$(CONFIG_QNX6FS_FS)		+= qnx6/
 obj-$(CONFIG_AUTOFS4_FS)	+= autofs4/
 obj-$(CONFIG_ADFS_FS)		+= adfs/
 obj-$(CONFIG_FUSE_FS)		+= fuse/
@@ -123,4 +120,8 @@ obj-$(CONFIG_DEBUG_FS)		+= debugfs/
 obj-$(CONFIG_OCFS2_FS)		+= ocfs2/
 obj-$(CONFIG_BTRFS_FS)		+= btrfs/
 obj-$(CONFIG_GFS2_FS)           += gfs2/
-obj-$(CONFIG_EXOFS_FS)          += exofs/
+obj-$(CONFIG_F2FS_FS)		+= f2fs/
+obj-y				+= exofs/ # Multiple modules
+obj-$(CONFIG_CEPH_FS)		+= ceph/
+obj-$(CONFIG_PSTORE)		+= pstore/
+obj-$(CONFIG_EFIVAR_FS)		+= efivarfs/
diff --git a/fs/adfs/Kconfig b/fs/adfs/Kconfig
index e55182a7460..c5a7787dd5e 100644
--- a/fs/adfs/Kconfig
+++ b/fs/adfs/Kconfig
@@ -1,6 +1,6 @@
 config ADFS_FS
-	tristate "ADFS file system support (EXPERIMENTAL)"
-	depends on BLOCK && EXPERIMENTAL
+	tristate "ADFS file system support"
+	depends on BLOCK
 	help
 	  The Acorn Disc Filing System is the standard file system of the
 	  RiscOS operating system which runs on Acorn's ARM-based Risc PC
diff --git a/fs/adfs/adfs.h b/fs/adfs/adfs.h
index e0a85dbeeb8..c770337c4b4 100644
--- a/fs/adfs/adfs.h
+++ b/fs/adfs/adfs.h
@@ -1,3 +1,6 @@
+#include <linux/fs.h>
+#include <linux/adfs_fs.h>
+
 /* Internal data structures for ADFS */
 
 #define ADFS_FREE_FRAG		 0
@@ -17,6 +20,62 @@
 struct buffer_head;
 
 /*
+ * adfs file system inode data in memory
+ */
+struct adfs_inode_info {
+	loff_t		mmu_private;
+	unsigned long	parent_id;	/* object id of parent		*/
+	__u32		loadaddr;	/* RISC OS load address		*/
+	__u32		execaddr;	/* RISC OS exec address		*/
+	unsigned int	filetype;	/* RISC OS file type		*/
+	unsigned int	attr;		/* RISC OS permissions		*/
+	unsigned int	stamped:1;	/* RISC OS file has date/time	*/
+	struct inode vfs_inode;
+};
+
+/*
+ * Forward-declare this
+ */
+struct adfs_discmap;
+struct adfs_dir_ops;
+
+/*
+ * ADFS file system superblock data in memory
+ */
+struct adfs_sb_info {
+	union { struct {
+		struct adfs_discmap *s_map;	/* bh list containing map	 */
+		struct adfs_dir_ops *s_dir;	/* directory operations		 */
+		};
+		struct rcu_head rcu;		/* used only at shutdown time	 */
+	};
+	kuid_t		s_uid;		/* owner uid				 */
+	kgid_t		s_gid;		/* owner gid				 */
+	umode_t		s_owner_mask;	/* ADFS owner perm -> unix perm		 */
+	umode_t		s_other_mask;	/* ADFS other perm -> unix perm		 */
+	int		s_ftsuffix;	/* ,xyz hex filetype suffix option */
+
+	__u32		s_ids_per_zone;	/* max. no ids in one zone		 */
+	__u32		s_idlen;	/* length of ID in map			 */
+	__u32		s_map_size;	/* sector size of a map			 */
+	unsigned long	s_size;		/* total size (in blocks) of this fs	 */
+	signed int	s_map2blk;	/* shift left by this for map->sector	 */
+	unsigned int	s_log2sharesize;/* log2 share size			 */
+	__le32		s_version;	/* disc format version			 */
+	unsigned int	s_namelen;	/* maximum number of characters in name	 */
+};
+
+static inline struct adfs_sb_info *ADFS_SB(struct super_block *sb)
+{
+	return sb->s_fs_info;
+}
+
+static inline struct adfs_inode_info *ADFS_I(struct inode *inode)
+{
+	return container_of(inode, struct adfs_inode_info, vfs_inode);
+}
+
+/*
  * Directory handling
  */
 struct adfs_dir {
@@ -24,6 +83,10 @@ struct adfs_dir {
 
 	int			nr_buffers;
 	struct buffer_head	*bh[4];
+
+	/* big directories need allocated buffers */
+	struct buffer_head	**bh_fplus;
+
 	unsigned int		pos;
 	unsigned int		parent_id;
 
@@ -34,7 +97,7 @@ struct adfs_dir {
 /*
  * This is the overall maximum name length
  */
-#define ADFS_MAX_NAME_LEN	256
+#define ADFS_MAX_NAME_LEN	(256 + 4) /* +4 for ,xyz hex filetype suffix */
 struct object_info {
 	__u32		parent_id;		/* parent object id	*/
 	__u32		file_id;		/* object id		*/
@@ -42,10 +105,26 @@ struct object_info {
 	__u32		execaddr;		/* execution address	*/
 	__u32		size;			/* size			*/
 	__u8		attr;			/* RISC OS attributes	*/
-	unsigned char	name_len;		/* name length		*/
+	unsigned int	name_len;		/* name length		*/
 	char		name[ADFS_MAX_NAME_LEN];/* file name		*/
+
+	/* RISC OS file type (12-bit: derived from loadaddr) */
+	__u16		filetype;
 };
 
+/* RISC OS 12-bit filetype converts to ,xyz hex filename suffix */
+static inline int append_filetype_suffix(char *buf, __u16 filetype)
+{
+	if (filetype == 0xffff)	/* no explicit 12-bit file type was set */
+		return 0;
+
+	*buf++ = ',';
+	*buf++ = hex_asc_lo(filetype >> 8);
+	*buf++ = hex_asc_lo(filetype >> 4);
+	*buf++ = hex_asc_lo(filetype >> 0);
+	return 4;
+}
+
 struct adfs_dir_ops {
 	int	(*read)(struct super_block *sb, unsigned int id, unsigned int sz, struct adfs_dir *dir);
 	int	(*setpos)(struct adfs_dir *dir, unsigned int fpos);
@@ -53,6 +132,7 @@ struct adfs_dir_ops {
 	int	(*update)(struct adfs_dir *dir, struct object_info *obj);
 	int	(*create)(struct adfs_dir *dir, struct object_info *obj);
 	int	(*remove)(struct adfs_dir *dir, struct object_info *obj);
+	int	(*sync)(struct adfs_dir *dir);
 	void	(*free)(struct adfs_dir *dir);
 };
 
@@ -65,7 +145,7 @@ struct adfs_discmap {
 
 /* Inode stuff */
 struct inode *adfs_iget(struct super_block *sb, struct object_info *obj);
-int adfs_write_inode(struct inode *inode,int unused);
+int adfs_write_inode(struct inode *inode, struct writeback_control *wbc);
 int adfs_notify_change(struct dentry *dentry, struct iattr *attr);
 
 /* map.c */
@@ -90,7 +170,8 @@ extern const struct dentry_operations adfs_dentry_operations;
 extern struct adfs_dir_ops adfs_f_dir_ops;
 extern struct adfs_dir_ops adfs_fplus_dir_ops;
 
-extern int adfs_dir_update(struct super_block *sb, struct object_info *obj);
+extern int adfs_dir_update(struct super_block *sb, struct object_info *obj,
+			   int wait);
 
 /* file.c */
 extern const struct inode_operations adfs_file_inode_operations;
diff --git a/fs/adfs/dir.c b/fs/adfs/dir.c
index e867ccf3724..0d138c0de29 100644
--- a/fs/adfs/dir.c
+++ b/fs/adfs/dir.c
@@ -9,15 +9,6 @@
  *
  *  Common directory handling for ADFS
  */
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/adfs_fs.h>
-#include <linux/time.h>
-#include <linux/stat.h>
-#include <linux/spinlock.h>
-#include <linux/smp_lock.h>
-#include <linux/buffer_head.h>		/* for file_fsync() */
-
 #include "adfs.h"
 
 /*
@@ -26,49 +17,43 @@
 static DEFINE_RWLOCK(adfs_dir_lock);
 
 static int
-adfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
+adfs_readdir(struct file *file, struct dir_context *ctx)
 {
-	struct inode *inode = filp->f_path.dentry->d_inode;
+	struct inode *inode = file_inode(file);
 	struct super_block *sb = inode->i_sb;
 	struct adfs_dir_ops *ops = ADFS_SB(sb)->s_dir;
 	struct object_info obj;
 	struct adfs_dir dir;
 	int ret = 0;
 
-	lock_kernel();	
-
-	if (filp->f_pos >> 32)
-		goto out;
+	if (ctx->pos >> 32)
+		return 0;
 
 	ret = ops->read(sb, inode->i_ino, inode->i_size, &dir);
 	if (ret)
-		goto out;
+		return ret;
 
-	switch ((unsigned long)filp->f_pos) {
-	case 0:
-		if (filldir(dirent, ".", 1, 0, inode->i_ino, DT_DIR) < 0)
+	if (ctx->pos == 0) {
+		if (!dir_emit_dot(file, ctx))
 			goto free_out;
-		filp->f_pos += 1;
-
-	case 1:
-		if (filldir(dirent, "..", 2, 1, dir.parent_id, DT_DIR) < 0)
+		ctx->pos = 1;
+	}
+	if (ctx->pos == 1) {
+		if (!dir_emit(ctx, "..", 2, dir.parent_id, DT_DIR))
 			goto free_out;
-		filp->f_pos += 1;
-
-	default:
-		break;
+		ctx->pos = 2;
 	}
 
 	read_lock(&adfs_dir_lock);
 
-	ret = ops->setpos(&dir, filp->f_pos - 2);
+	ret = ops->setpos(&dir, ctx->pos - 2);
 	if (ret)
 		goto unlock_out;
 	while (ops->getnext(&dir, &obj) == 0) {
-		if (filldir(dirent, obj.name, obj.name_len,
-			    filp->f_pos, obj.file_id, DT_UNKNOWN) < 0)
-			goto unlock_out;
-		filp->f_pos += 1;
+		if (!dir_emit(ctx, obj.name, obj.name_len,
+			    obj.file_id, DT_UNKNOWN))
+			break;
+		ctx->pos++;
 	}
 
 unlock_out:
@@ -76,14 +61,11 @@ unlock_out:
 
 free_out:
 	ops->free(&dir);
-
-out:
-	unlock_kernel();
 	return ret;
 }
 
 int
-adfs_dir_update(struct super_block *sb, struct object_info *obj)
+adfs_dir_update(struct super_block *sb, struct object_info *obj, int wait)
 {
 	int ret = -EINVAL;
 #ifdef CONFIG_ADFS_FS_RW
@@ -106,6 +88,12 @@ adfs_dir_update(struct super_block *sb, struct object_info *obj)
 	ret = ops->update(&dir, obj);
 	write_unlock(&adfs_dir_lock);
 
+	if (wait) {
+		int err = ops->sync(&dir);
+		if (!ret)
+			ret = err;
+	}
+
 	ops->free(&dir);
 out:
 #endif
@@ -198,12 +186,12 @@ out:
 const struct file_operations adfs_dir_operations = {
 	.read		= generic_read_dir,
 	.llseek		= generic_file_llseek,
-	.readdir	= adfs_readdir,
-	.fsync		= file_fsync,
+	.iterate	= adfs_readdir,
+	.fsync		= generic_file_fsync,
 };
 
 static int
-adfs_hash(struct dentry *parent, struct qstr *qstr)
+adfs_hash(const struct dentry *parent, struct qstr *qstr)
 {
 	const unsigned int name_len = ADFS_SB(parent->d_sb)->s_namelen;
 	const unsigned char *name;
@@ -239,17 +227,18 @@ adfs_hash(struct dentry *parent, struct qstr *qstr)
  * requirements of the underlying filesystem.
  */
 static int
-adfs_compare(struct dentry *parent, struct qstr *entry, struct qstr *name)
+adfs_compare(const struct dentry *parent, const struct dentry *dentry,
+		unsigned int len, const char *str, const struct qstr *name)
 {
 	int i;
 
-	if (entry->len != name->len)
+	if (len != name->len)
 		return 1;
 
 	for (i = 0; i < name->len; i++) {
 		char a, b;
 
-		a = entry->name[i];
+		a = str[i];
 		b = name->name[i];
 
 		if (a >= 'A' && a <= 'Z')
@@ -269,14 +258,12 @@ const struct dentry_operations adfs_dentry_operations = {
 };
 
 static struct dentry *
-adfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+adfs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
 {
 	struct inode *inode = NULL;
 	struct object_info obj;
 	int error;
 
-	dentry->d_op = &adfs_dentry_operations;	
-	lock_kernel();
 	error = adfs_dir_lookup_byname(dir, &dentry->d_name, &obj);
 	if (error == 0) {
 		error = -EACCES;
@@ -288,7 +275,6 @@ adfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
 		if (inode)
 			error = 0;
 	}
-	unlock_kernel();
 	d_add(dentry, inode);
 	return ERR_PTR(error);
 }
diff --git a/fs/adfs/dir_f.c b/fs/adfs/dir_f.c
index ea7df214692..4bbe853ee50 100644
--- a/fs/adfs/dir_f.c
+++ b/fs/adfs/dir_f.c
@@ -9,15 +9,7 @@
  *
  *  E and F format directory handling
  */
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/adfs_fs.h>
-#include <linux/time.h>
-#include <linux/stat.h>
-#include <linux/spinlock.h>
 #include <linux/buffer_head.h>
-#include <linux/string.h>
-
 #include "adfs.h"
 #include "dir_f.h"
 
@@ -60,7 +52,6 @@ static inline int adfs_readname(char *buf, char *ptr, int maxlen)
 			*buf++ = *ptr;
 		ptr++;
 	}
-	*buf = '\0';
 
 	return buf - old_buf;
 }
@@ -216,7 +207,8 @@ release_buffers:
  * convert a disk-based directory entry to a Linux ADFS directory entry
  */
 static inline void
-adfs_dir2obj(struct object_info *obj, struct adfs_direntry *de)
+adfs_dir2obj(struct adfs_dir *dir, struct object_info *obj,
+	struct adfs_direntry *de)
 {
 	obj->name_len =	adfs_readname(obj->name, de->dirobname, ADFS_F_NAME_LEN);
 	obj->file_id  = adfs_readval(de->dirinddiscadd, 3);
@@ -224,6 +216,23 @@ adfs_dir2obj(struct object_info *obj, struct adfs_direntry *de)
 	obj->execaddr = adfs_readval(de->direxec, 4);
 	obj->size     = adfs_readval(de->dirlen,  4);
 	obj->attr     = de->newdiratts;
+	obj->filetype = -1;
+
+	/*
+	 * object is a file and is filetyped and timestamped?
+	 * RISC OS 12-bit filetype is stored in load_address[19:8]
+	 */
+	if ((0 == (obj->attr & ADFS_NDA_DIRECTORY)) &&
+		(0xfff00000 == (0xfff00000 & obj->loadaddr))) {
+		obj->filetype = (__u16) ((0x000fff00 & obj->loadaddr) >> 8);
+
+		/* optionally append the ,xyz hex filetype suffix */
+		if (ADFS_SB(dir->sb)->s_ftsuffix)
+			obj->name_len +=
+				append_filetype_suffix(
+					&obj->name[obj->name_len],
+					obj->filetype);
+	}
 }
 
 /*
@@ -268,7 +277,7 @@ __adfs_dir_get(struct adfs_dir *dir, int pos, struct object_info *obj)
 	if (!de.dirobname[0])
 		return -ENOENT;
 
-	adfs_dir2obj(obj, &de);
+	adfs_dir2obj(dir, obj, &de);
 
 	return 0;
 }
@@ -437,6 +446,22 @@ bad_dir:
 #endif
 }
 
+static int
+adfs_f_sync(struct adfs_dir *dir)
+{
+	int err = 0;
+	int i;
+
+	for (i = dir->nr_buffers - 1; i >= 0; i--) {
+		struct buffer_head *bh = dir->bh[i];
+		sync_dirty_buffer(bh);
+		if (buffer_req(bh) && !buffer_uptodate(bh))
+			err = -EIO;
+	}
+
+	return err;
+}
+
 static void
 adfs_f_free(struct adfs_dir *dir)
 {
@@ -456,5 +481,6 @@ struct adfs_dir_ops adfs_f_dir_ops = {
 	.setpos		= adfs_f_setpos,
 	.getnext	= adfs_f_getnext,
 	.update		= adfs_f_update,
+	.sync		= adfs_f_sync,
 	.free		= adfs_f_free
 };
diff --git a/fs/adfs/dir_fplus.c b/fs/adfs/dir_fplus.c
index 1ec644e32df..d9e3bee4e65 100644
--- a/fs/adfs/dir_fplus.c
+++ b/fs/adfs/dir_fplus.c
@@ -7,15 +7,8 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/adfs_fs.h>
-#include <linux/time.h>
-#include <linux/stat.h>
-#include <linux/spinlock.h>
 #include <linux/buffer_head.h>
-#include <linux/string.h>
-
+#include <linux/slab.h>
 #include "adfs.h"
 #include "dir_fplus.h"
 
@@ -30,30 +23,53 @@ adfs_fplus_read(struct super_block *sb, unsigned int id, unsigned int sz, struct
 
 	dir->nr_buffers = 0;
 
+	/* start off using fixed bh set - only alloc for big dirs */
+	dir->bh_fplus = &dir->bh[0];
+
 	block = __adfs_block_map(sb, id, 0);
 	if (!block) {
 		adfs_error(sb, "dir object %X has a hole at offset 0", id);
 		goto out;
 	}
 
-	dir->bh[0] = sb_bread(sb, block);
-	if (!dir->bh[0])
+	dir->bh_fplus[0] = sb_bread(sb, block);
+	if (!dir->bh_fplus[0])
 		goto out;
 	dir->nr_buffers += 1;
 
-	h = (struct adfs_bigdirheader *)dir->bh[0]->b_data;
+	h = (struct adfs_bigdirheader *)dir->bh_fplus[0]->b_data;
 	size = le32_to_cpu(h->bigdirsize);
 	if (size != sz) {
-		printk(KERN_WARNING "adfs: adfs_fplus_read: directory header size\n"
-				" does not match directory size\n");
+		printk(KERN_WARNING "adfs: adfs_fplus_read:"
+					" directory header size %X\n"
+					" does not match directory size %X\n",
+					size, sz);
 	}
 
 	if (h->bigdirversion[0] != 0 || h->bigdirversion[1] != 0 ||
 	    h->bigdirversion[2] != 0 || size & 2047 ||
-	    h->bigdirstartname != cpu_to_le32(BIGDIRSTARTNAME))
+	    h->bigdirstartname != cpu_to_le32(BIGDIRSTARTNAME)) {
+		printk(KERN_WARNING "adfs: dir object %X has"
+					" malformed dir header\n", id);
 		goto out;
+	}
 
 	size >>= sb->s_blocksize_bits;
+	if (size > sizeof(dir->bh)/sizeof(dir->bh[0])) {
+		/* this directory is too big for fixed bh set, must allocate */
+		struct buffer_head **bh_fplus =
+			kzalloc(size * sizeof(struct buffer_head *),
+				GFP_KERNEL);
+		if (!bh_fplus) {
+			adfs_error(sb, "not enough memory for"
+					" dir object %X (%d blocks)", id, size);
+			goto out;
+		}
+		dir->bh_fplus = bh_fplus;
+		/* copy over the pointer to the block that we've already read */
+		dir->bh_fplus[0] = dir->bh[0];
+	}
+
 	for (blk = 1; blk < size; blk++) {
 		block = __adfs_block_map(sb, id, blk);
 		if (!block) {
@@ -61,25 +77,44 @@ adfs_fplus_read(struct super_block *sb, unsigned int id, unsigned int sz, struct
 			goto out;
 		}
 
-		dir->bh[blk] = sb_bread(sb, block);
-		if (!dir->bh[blk])
+		dir->bh_fplus[blk] = sb_bread(sb, block);
+		if (!dir->bh_fplus[blk]) {
+			adfs_error(sb,	"dir object %X failed read for"
+					" offset %d, mapped block %X",
+					id, blk, block);
 			goto out;
-		dir->nr_buffers = blk;
+		}
+
+		dir->nr_buffers += 1;
 	}
 
-	t = (struct adfs_bigdirtail *)(dir->bh[size - 1]->b_data + (sb->s_blocksize - 8));
+	t = (struct adfs_bigdirtail *)
+		(dir->bh_fplus[size - 1]->b_data + (sb->s_blocksize - 8));
 
 	if (t->bigdirendname != cpu_to_le32(BIGDIRENDNAME) ||
 	    t->bigdirendmasseq != h->startmasseq ||
-	    t->reserved[0] != 0 || t->reserved[1] != 0)
+	    t->reserved[0] != 0 || t->reserved[1] != 0) {
+		printk(KERN_WARNING "adfs: dir object %X has "
+					"malformed dir end\n", id);
 		goto out;
+	}
 
 	dir->parent_id = le32_to_cpu(h->bigdirparent);
 	dir->sb = sb;
 	return 0;
+
 out:
-	for (i = 0; i < dir->nr_buffers; i++)
-		brelse(dir->bh[i]);
+	if (dir->bh_fplus) {
+		for (i = 0; i < dir->nr_buffers; i++)
+			brelse(dir->bh_fplus[i]);
+
+		if (&dir->bh[0] != dir->bh_fplus)
+			kfree(dir->bh_fplus);
+
+		dir->bh_fplus = NULL;
+	}
+
+	dir->nr_buffers = 0;
 	dir->sb = NULL;
 	return ret;
 }
@@ -87,7 +122,8 @@ out:
 static int
 adfs_fplus_setpos(struct adfs_dir *dir, unsigned int fpos)
 {
-	struct adfs_bigdirheader *h = (struct adfs_bigdirheader *)dir->bh[0]->b_data;
+	struct adfs_bigdirheader *h =
+		(struct adfs_bigdirheader *) dir->bh_fplus[0]->b_data;
 	int ret = -ENOENT;
 
 	if (fpos <= le32_to_cpu(h->bigdirentries)) {
@@ -110,21 +146,27 @@ dir_memcpy(struct adfs_dir *dir, unsigned int offset, void *to, int len)
 	partial = sb->s_blocksize - offset;
 
 	if (partial >= len)
-		memcpy(to, dir->bh[buffer]->b_data + offset, len);
+		memcpy(to, dir->bh_fplus[buffer]->b_data + offset, len);
 	else {
 		char *c = (char *)to;
 
 		remainder = len - partial;
 
-		memcpy(c, dir->bh[buffer]->b_data + offset, partial);
-		memcpy(c + partial, dir->bh[buffer + 1]->b_data, remainder);
+		memcpy(c,
+			dir->bh_fplus[buffer]->b_data + offset,
+			partial);
+
+		memcpy(c + partial,
+			dir->bh_fplus[buffer + 1]->b_data,
+			remainder);
 	}
 }
 
 static int
 adfs_fplus_getnext(struct adfs_dir *dir, struct object_info *obj)
 {
-	struct adfs_bigdirheader *h = (struct adfs_bigdirheader *)dir->bh[0]->b_data;
+	struct adfs_bigdirheader *h =
+		(struct adfs_bigdirheader *) dir->bh_fplus[0]->b_data;
 	struct adfs_bigdirentry bde;
 	unsigned int offset;
 	int i, ret = -ENOENT;
@@ -155,19 +197,62 @@ adfs_fplus_getnext(struct adfs_dir *dir, struct object_info *obj)
 		if (obj->name[i] == '/')
 			obj->name[i] = '.';
 
+	obj->filetype = -1;
+
+	/*
+	 * object is a file and is filetyped and timestamped?
+	 * RISC OS 12-bit filetype is stored in load_address[19:8]
+	 */
+	if ((0 == (obj->attr & ADFS_NDA_DIRECTORY)) &&
+		(0xfff00000 == (0xfff00000 & obj->loadaddr))) {
+		obj->filetype = (__u16) ((0x000fff00 & obj->loadaddr) >> 8);
+
+		/* optionally append the ,xyz hex filetype suffix */
+		if (ADFS_SB(dir->sb)->s_ftsuffix)
+			obj->name_len +=
+				append_filetype_suffix(
+					&obj->name[obj->name_len],
+					obj->filetype);
+	}
+
 	dir->pos += 1;
 	ret = 0;
 out:
 	return ret;
 }
 
+static int
+adfs_fplus_sync(struct adfs_dir *dir)
+{
+	int err = 0;
+	int i;
+
+	for (i = dir->nr_buffers - 1; i >= 0; i--) {
+		struct buffer_head *bh = dir->bh_fplus[i];
+		sync_dirty_buffer(bh);
+		if (buffer_req(bh) && !buffer_uptodate(bh))
+			err = -EIO;
+	}
+
+	return err;
+}
+
 static void
 adfs_fplus_free(struct adfs_dir *dir)
 {
 	int i;
 
-	for (i = 0; i < dir->nr_buffers; i++)
-		brelse(dir->bh[i]);
+	if (dir->bh_fplus) {
+		for (i = 0; i < dir->nr_buffers; i++)
+			brelse(dir->bh_fplus[i]);
+
+		if (&dir->bh[0] != dir->bh_fplus)
+			kfree(dir->bh_fplus);
+
+		dir->bh_fplus = NULL;
+	}
+
+	dir->nr_buffers = 0;
 	dir->sb = NULL;
 }
 
@@ -175,5 +260,6 @@ struct adfs_dir_ops adfs_fplus_dir_ops = {
 	.read		= adfs_fplus_read,
 	.setpos		= adfs_fplus_setpos,
 	.getnext	= adfs_fplus_getnext,
+	.sync		= adfs_fplus_sync,
 	.free		= adfs_fplus_free
 };
diff --git a/fs/adfs/file.c b/fs/adfs/file.c
index 36e381c6a99..07c9edce5aa 100644
--- a/fs/adfs/file.c
+++ b/fs/adfs/file.c
@@ -19,20 +19,16 @@
  *
  *  adfs regular file handling primitives           
  */
-#include <linux/fs.h>
-#include <linux/buffer_head.h>			/* for file_fsync() */
-#include <linux/adfs_fs.h>
-
 #include "adfs.h"
 
 const struct file_operations adfs_file_operations = {
 	.llseek		= generic_file_llseek,
-	.read		= do_sync_read,
-	.aio_read	= generic_file_aio_read,
+	.read		= new_sync_read,
+	.read_iter	= generic_file_read_iter,
 	.mmap		= generic_file_mmap,
-	.fsync		= file_fsync,
-	.write		= do_sync_write,
-	.aio_write	= generic_file_aio_write,
+	.fsync		= generic_file_fsync,
+	.write		= new_sync_write,
+	.write_iter	= generic_file_write_iter,
 	.splice_read	= generic_file_splice_read,
 };
 
diff --git a/fs/adfs/inode.c b/fs/adfs/inode.c
index e647200262a..b9acadafa4a 100644
--- a/fs/adfs/inode.c
+++ b/fs/adfs/inode.c
@@ -7,17 +7,8 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/adfs_fs.h>
-#include <linux/time.h>
-#include <linux/stat.h>
-#include <linux/string.h>
-#include <linux/mm.h>
-#include <linux/smp_lock.h>
-#include <linux/module.h>
 #include <linux/buffer_head.h>
-
+#include <linux/writeback.h>
 #include "adfs.h"
 
 /*
@@ -28,9 +19,6 @@ static int
 adfs_get_block(struct inode *inode, sector_t block, struct buffer_head *bh,
 	       int create)
 {
-	if (block < 0)
-		goto abort_negative;
-
 	if (!create) {
 		if (block >= inode->i_blocks)
 			goto abort_toobig;
@@ -43,10 +31,6 @@ adfs_get_block(struct inode *inode, sector_t block, struct buffer_head *bh,
 	/* don't support allocation of blocks yet */
 	return -EIO;
 
-abort_negative:
-	adfs_error(inode->i_sb, "block %d < 0", block);
-	return -EIO;
-
 abort_toobig:
 	return 0;
 }
@@ -61,14 +45,28 @@ static int adfs_readpage(struct file *file, struct page *page)
 	return block_read_full_page(page, adfs_get_block);
 }
 
+static void adfs_write_failed(struct address_space *mapping, loff_t to)
+{
+	struct inode *inode = mapping->host;
+
+	if (to > inode->i_size)
+		truncate_pagecache(inode, inode->i_size);
+}
+
 static int adfs_write_begin(struct file *file, struct address_space *mapping,
 			loff_t pos, unsigned len, unsigned flags,
 			struct page **pagep, void **fsdata)
 {
+	int ret;
+
 	*pagep = NULL;
-	return cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
+	ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
 				adfs_get_block,
 				&ADFS_I(mapping->host)->mmu_private);
+	if (unlikely(ret))
+		adfs_write_failed(mapping, pos + len);
+
+	return ret;
 }
 
 static sector_t _adfs_bmap(struct address_space *mapping, sector_t block)
@@ -79,32 +77,18 @@ static sector_t _adfs_bmap(struct address_space *mapping, sector_t block)
 static const struct address_space_operations adfs_aops = {
 	.readpage	= adfs_readpage,
 	.writepage	= adfs_writepage,
-	.sync_page	= block_sync_page,
 	.write_begin	= adfs_write_begin,
 	.write_end	= generic_write_end,
 	.bmap		= _adfs_bmap
 };
 
-static inline unsigned int
-adfs_filetype(struct inode *inode)
-{
-	unsigned int type;
-
-	if (ADFS_I(inode)->stamped)
-		type = (ADFS_I(inode)->loadaddr >> 8) & 0xfff;
-	else
-		type = (unsigned int) -1;
-
-	return type;
-}
-
 /*
  * Convert ADFS attributes and filetype to Linux permission.
  */
 static umode_t
 adfs_atts2mode(struct super_block *sb, struct inode *inode)
 {
-	unsigned int filetype, attr = ADFS_I(inode)->attr;
+	unsigned int attr = ADFS_I(inode)->attr;
 	umode_t mode, rmask;
 	struct adfs_sb_info *asb = ADFS_SB(sb);
 
@@ -113,9 +97,7 @@ adfs_atts2mode(struct super_block *sb, struct inode *inode)
 		return S_IFDIR | S_IXUGO | mode;
 	}
 
-	filetype = adfs_filetype(inode);
-
-	switch (filetype) {
+	switch (ADFS_I(inode)->filetype) {
 	case 0xfc0:	/* LinkFS */
 		return S_IFLNK|S_IRWXUGO;
 
@@ -181,50 +163,48 @@ adfs_mode2atts(struct super_block *sb, struct inode *inode)
 
 /*
  * Convert an ADFS time to Unix time.  ADFS has a 40-bit centi-second time
- * referenced to 1 Jan 1900 (til 2248)
+ * referenced to 1 Jan 1900 (til 2248) so we need to discard 2208988800 seconds
+ * of time to convert from RISC OS epoch to Unix epoch.
  */
 static void
 adfs_adfs2unix_time(struct timespec *tv, struct inode *inode)
 {
 	unsigned int high, low;
+	/* 01 Jan 1970 00:00:00 (Unix epoch) as nanoseconds since
+	 * 01 Jan 1900 00:00:00 (RISC OS epoch)
+	 */
+	static const s64 nsec_unix_epoch_diff_risc_os_epoch =
+							2208988800000000000LL;
+	s64 nsec;
 
 	if (ADFS_I(inode)->stamped == 0)
 		goto cur_time;
 
-	high = ADFS_I(inode)->loadaddr << 24;
-	low  = ADFS_I(inode)->execaddr;
+	high = ADFS_I(inode)->loadaddr & 0xFF; /* top 8 bits of timestamp */
+	low  = ADFS_I(inode)->execaddr;    /* bottom 32 bits of timestamp */
 
-	high |= low >> 8;
-	low  &= 255;
+	/* convert 40-bit centi-seconds to 32-bit seconds
+	 * going via nanoseconds to retain precision
+	 */
+	nsec = (((s64) high << 32) | (s64) low) * 10000000; /* cs to ns */
 
 	/* Files dated pre  01 Jan 1970 00:00:00. */
-	if (high < 0x336e996a)
+	if (nsec < nsec_unix_epoch_diff_risc_os_epoch)
 		goto too_early;
 
-	/* Files dated post 18 Jan 2038 03:14:05. */
-	if (high >= 0x656e9969)
-		goto too_late;
+	/* convert from RISC OS to Unix epoch */
+	nsec -= nsec_unix_epoch_diff_risc_os_epoch;
 
-	/* discard 2208988800 (0x336e996a00) seconds of time */
-	high -= 0x336e996a;
-
-	/* convert 40-bit centi-seconds to 32-bit seconds */
-	tv->tv_sec = (((high % 100) << 8) + low) / 100 + (high / 100 << 8);
-	tv->tv_nsec = 0;
+	*tv = ns_to_timespec(nsec);
 	return;
 
  cur_time:
-	*tv = CURRENT_TIME_SEC;
+	*tv = CURRENT_TIME;
 	return;
 
  too_early:
 	tv->tv_sec = tv->tv_nsec = 0;
 	return;
-
- too_late:
-	tv->tv_sec = 0x7ffffffd;
-	tv->tv_nsec = 0;
-	return;
 }
 
 /*
@@ -272,7 +252,7 @@ adfs_iget(struct super_block *sb, struct object_info *obj)
 	inode->i_gid	 = ADFS_SB(sb)->s_gid;
 	inode->i_ino	 = obj->file_id;
 	inode->i_size	 = obj->size;
-	inode->i_nlink	 = 2;
+	set_nlink(inode, 2);
 	inode->i_blocks	 = (inode->i_size + sb->s_blocksize - 1) >>
 			    sb->s_blocksize_bits;
 
@@ -286,7 +266,8 @@ adfs_iget(struct super_block *sb, struct object_info *obj)
 	ADFS_I(inode)->loadaddr  = obj->loadaddr;
 	ADFS_I(inode)->execaddr  = obj->execaddr;
 	ADFS_I(inode)->attr      = obj->attr;
-	ADFS_I(inode)->stamped	  = ((obj->loadaddr & 0xfff00000) == 0xfff00000);
+	ADFS_I(inode)->filetype  = obj->filetype;
+	ADFS_I(inode)->stamped   = ((obj->loadaddr & 0xfff00000) == 0xfff00000);
 
 	inode->i_mode	 = adfs_atts2mode(sb, inode);
 	adfs_adfs2unix_time(&inode->i_mtime, inode);
@@ -322,26 +303,22 @@ adfs_notify_change(struct dentry *dentry, struct iattr *attr)
 	unsigned int ia_valid = attr->ia_valid;
 	int error;
 	
-	lock_kernel();
-
 	error = inode_change_ok(inode, attr);
 
 	/*
 	 * we can't change the UID or GID of any file -
 	 * we have a global UID/GID in the superblock
 	 */
-	if ((ia_valid & ATTR_UID && attr->ia_uid != ADFS_SB(sb)->s_uid) ||
-	    (ia_valid & ATTR_GID && attr->ia_gid != ADFS_SB(sb)->s_gid))
+	if ((ia_valid & ATTR_UID && !uid_eq(attr->ia_uid, ADFS_SB(sb)->s_uid)) ||
+	    (ia_valid & ATTR_GID && !gid_eq(attr->ia_gid, ADFS_SB(sb)->s_gid)))
 		error = -EPERM;
 
 	if (error)
 		goto out;
 
+	/* XXX: this is missing some actual on-disk truncation.. */
 	if (ia_valid & ATTR_SIZE)
-		error = vmtruncate(inode, attr->ia_size);
-
-	if (error)
-		goto out;
+		truncate_setsize(inode, attr->ia_size);
 
 	if (ia_valid & ATTR_MTIME) {
 		inode->i_mtime = attr->ia_mtime;
@@ -367,7 +344,6 @@ adfs_notify_change(struct dentry *dentry, struct iattr *attr)
 	if (ia_valid & (ATTR_SIZE | ATTR_MTIME | ATTR_MODE))
 		mark_inode_dirty(inode);
 out:
-	unlock_kernel();
 	return error;
 }
 
@@ -376,13 +352,12 @@ out:
  * The adfs-specific inode data has already been updated by
  * adfs_notify_change()
  */
-int adfs_write_inode(struct inode *inode, int unused)
+int adfs_write_inode(struct inode *inode, struct writeback_control *wbc)
 {
 	struct super_block *sb = inode->i_sb;
 	struct object_info obj;
 	int ret;
 
-	lock_kernel();
 	obj.file_id	= inode->i_ino;
 	obj.name_len	= 0;
 	obj.parent_id	= ADFS_I(inode)->parent_id;
@@ -391,8 +366,6 @@ int adfs_write_inode(struct inode *inode, int unused)
 	obj.attr	= ADFS_I(inode)->attr;
 	obj.size	= inode->i_size;
 
-	ret = adfs_dir_update(sb, &obj);
-	unlock_kernel();
+	ret = adfs_dir_update(sb, &obj, wbc->sync_mode == WB_SYNC_ALL);
 	return ret;
 }
-MODULE_LICENSE("GPL");
diff --git a/fs/adfs/map.c b/fs/adfs/map.c
index 92ab4fbc203..6935f05202a 100644
--- a/fs/adfs/map.c
+++ b/fs/adfs/map.c
@@ -7,14 +7,8 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/adfs_fs.h>
-#include <linux/spinlock.h>
 #include <linux/buffer_head.h>
-
 #include <asm/unaligned.h>
-
 #include "adfs.h"
 
 /*
@@ -57,12 +51,12 @@ static DEFINE_RWLOCK(adfs_map_lock);
 
 /*
  * This is fun.  We need to load up to 19 bits from the map at an
- * arbitary bit alignment.  (We're limited to 19 bits by F+ version 2).
+ * arbitrary bit alignment.  (We're limited to 19 bits by F+ version 2).
  */
 #define GET_FRAG_ID(_map,_start,_idmask)				\
 	({								\
 		unsigned char *_m = _map + (_start >> 3);		\
-		u32 _frag = get_unaligned((u32 *)_m);			\
+		u32 _frag = get_unaligned_le32(_m);			\
 		_frag >>= (_start & 7);					\
 		_frag & _idmask;					\
 	})
diff --git a/fs/adfs/super.c b/fs/adfs/super.c
index dd9becca424..9852bdf34d7 100644
--- a/fs/adfs/super.c
+++ b/fs/adfs/super.c
@@ -8,26 +8,14 @@
  * published by the Free Software Foundation.
  */
 #include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/adfs_fs.h>
-#include <linux/slab.h>
-#include <linux/time.h>
-#include <linux/stat.h>
-#include <linux/string.h>
 #include <linux/init.h>
 #include <linux/buffer_head.h>
-#include <linux/vfs.h>
 #include <linux/parser.h>
-#include <linux/bitops.h>
 #include <linux/mount.h>
 #include <linux/seq_file.h>
-
-#include <asm/uaccess.h>
-#include <asm/system.h>
-
-#include <stdarg.h>
-
+#include <linux/slab.h>
+#include <linux/statfs.h>
+#include <linux/user_namespace.h>
 #include "adfs.h"
 #include "dir_f.h"
 #include "dir_fplus.h"
@@ -135,33 +123,35 @@ static void adfs_put_super(struct super_block *sb)
 	for (i = 0; i < asb->s_map_size; i++)
 		brelse(asb->s_map[i].dm_bh);
 	kfree(asb->s_map);
-	kfree(asb);
-	sb->s_fs_info = NULL;
+	kfree_rcu(asb, rcu);
 }
 
-static int adfs_show_options(struct seq_file *seq, struct vfsmount *mnt)
+static int adfs_show_options(struct seq_file *seq, struct dentry *root)
 {
-	struct adfs_sb_info *asb = ADFS_SB(mnt->mnt_sb);
+	struct adfs_sb_info *asb = ADFS_SB(root->d_sb);
 
-	if (asb->s_uid != 0)
-		seq_printf(seq, ",uid=%u", asb->s_uid);
-	if (asb->s_gid != 0)
-		seq_printf(seq, ",gid=%u", asb->s_gid);
+	if (!uid_eq(asb->s_uid, GLOBAL_ROOT_UID))
+		seq_printf(seq, ",uid=%u", from_kuid_munged(&init_user_ns, asb->s_uid));
+	if (!gid_eq(asb->s_gid, GLOBAL_ROOT_GID))
+		seq_printf(seq, ",gid=%u", from_kgid_munged(&init_user_ns, asb->s_gid));
 	if (asb->s_owner_mask != ADFS_DEFAULT_OWNER_MASK)
 		seq_printf(seq, ",ownmask=%o", asb->s_owner_mask);
 	if (asb->s_other_mask != ADFS_DEFAULT_OTHER_MASK)
 		seq_printf(seq, ",othmask=%o", asb->s_other_mask);
+	if (asb->s_ftsuffix != 0)
+		seq_printf(seq, ",ftsuffix=%u", asb->s_ftsuffix);
 
 	return 0;
 }
 
-enum {Opt_uid, Opt_gid, Opt_ownmask, Opt_othmask, Opt_err};
+enum {Opt_uid, Opt_gid, Opt_ownmask, Opt_othmask, Opt_ftsuffix, Opt_err};
 
 static const match_table_t tokens = {
 	{Opt_uid, "uid=%u"},
 	{Opt_gid, "gid=%u"},
 	{Opt_ownmask, "ownmask=%o"},
 	{Opt_othmask, "othmask=%o"},
+	{Opt_ftsuffix, "ftsuffix=%u"},
 	{Opt_err, NULL}
 };
 
@@ -185,12 +175,16 @@ static int parse_options(struct super_block *sb, char *options)
 		case Opt_uid:
 			if (match_int(args, &option))
 				return -EINVAL;
-			asb->s_uid = option;
+			asb->s_uid = make_kuid(current_user_ns(), option);
+			if (!uid_valid(asb->s_uid))
+				return -EINVAL;
 			break;
 		case Opt_gid:
 			if (match_int(args, &option))
 				return -EINVAL;
-			asb->s_gid = option;
+			asb->s_gid = make_kgid(current_user_ns(), option);
+			if (!gid_valid(asb->s_gid))
+				return -EINVAL;
 			break;
 		case Opt_ownmask:
 			if (match_octal(args, &option))
@@ -202,6 +196,11 @@ static int parse_options(struct super_block *sb, char *options)
 				return -EINVAL;
 			asb->s_other_mask = option;
 			break;
+		case Opt_ftsuffix:
+			if (match_int(args, &option))
+				return -EINVAL;
+			asb->s_ftsuffix = option;
+			break;
 		default:
 			printk("ADFS-fs: unrecognised mount option \"%s\" "
 					"or missing value\n", p);
@@ -213,6 +212,7 @@ static int parse_options(struct super_block *sb, char *options)
 
 static int adfs_remount(struct super_block *sb, int *flags, char *data)
 {
+	sync_filesystem(sb);
 	*flags |= MS_NODIRATIME;
 	return parse_options(sb, data);
 }
@@ -248,11 +248,17 @@ static struct inode *adfs_alloc_inode(struct super_block *sb)
 	return &ei->vfs_inode;
 }
 
-static void adfs_destroy_inode(struct inode *inode)
+static void adfs_i_callback(struct rcu_head *head)
 {
+	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kmem_cache_free(adfs_inode_cachep, ADFS_I(inode));
 }
 
+static void adfs_destroy_inode(struct inode *inode)
+{
+	call_rcu(&inode->i_rcu, adfs_i_callback);
+}
+
 static void init_once(void *foo)
 {
 	struct adfs_inode_info *ei = (struct adfs_inode_info *) foo;
@@ -260,7 +266,7 @@ static void init_once(void *foo)
 	inode_init_once(&ei->vfs_inode);
 }
 
-static int init_inodecache(void)
+static int __init init_inodecache(void)
 {
 	adfs_inode_cachep = kmem_cache_create("adfs_inode_cache",
 					     sizeof(struct adfs_inode_info),
@@ -274,6 +280,11 @@ static int init_inodecache(void)
 
 static void destroy_inodecache(void)
 {
+	/*
+	 * Make sure all delayed rcu free inodes are flushed before we
+	 * destroy cache.
+	 */
+	rcu_barrier();
 	kmem_cache_destroy(adfs_inode_cachep);
 }
 
@@ -368,10 +379,11 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent)
 	sb->s_fs_info = asb;
 
 	/* set default options */
-	asb->s_uid = 0;
-	asb->s_gid = 0;
+	asb->s_uid = GLOBAL_ROOT_UID;
+	asb->s_gid = GLOBAL_ROOT_GID;
 	asb->s_owner_mask = ADFS_DEFAULT_OWNER_MASK;
 	asb->s_other_mask = ADFS_DEFAULT_OTHER_MASK;
+	asb->s_ftsuffix = 0;
 
 	if (parse_options(sb, data))
 		goto error;
@@ -451,11 +463,13 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent)
 
 	root_obj.parent_id = root_obj.file_id = le32_to_cpu(dr->root);
 	root_obj.name_len  = 0;
-	root_obj.loadaddr  = 0;
-	root_obj.execaddr  = 0;
+	/* Set root object date as 01 Jan 1987 00:00:00 */
+	root_obj.loadaddr  = 0xfff0003f;
+	root_obj.execaddr  = 0xec22c000;
 	root_obj.size	   = ADFS_NEWDIR_SIZE;
 	root_obj.attr	   = ADFS_NDA_DIRECTORY   | ADFS_NDA_OWNER_READ |
 			     ADFS_NDA_OWNER_WRITE | ADFS_NDA_PUBLIC_READ;
+	root_obj.filetype  = -1;
 
 	/*
 	 * If this is a F+ disk with variable length directories,
@@ -469,19 +483,24 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent)
 		asb->s_dir     = &adfs_f_dir_ops;
 		asb->s_namelen = ADFS_F_NAME_LEN;
 	}
+	/*
+	 * ,xyz hex filetype suffix may be added by driver
+	 * to files that have valid RISC OS filetype
+	 */
+	if (asb->s_ftsuffix)
+		asb->s_namelen += 4;
 
+	sb->s_d_op = &adfs_dentry_operations;
 	root = adfs_iget(sb, &root_obj);
-	sb->s_root = d_alloc_root(root);
+	sb->s_root = d_make_root(root);
 	if (!sb->s_root) {
 		int i;
-		iput(root);
 		for (i = 0; i < asb->s_map_size; i++)
 			brelse(asb->s_map[i].dm_bh);
 		kfree(asb->s_map);
 		adfs_error(sb, "get root inode failed\n");
 		goto error;
-	} else
-		sb->s_root->d_op = &adfs_dentry_operations;
+	}
 	return 0;
 
 error_free_bh:
@@ -492,20 +511,20 @@ error:
 	return -EINVAL;
 }
 
-static int adfs_get_sb(struct file_system_type *fs_type,
-	int flags, const char *dev_name, void *data, struct vfsmount *mnt)
+static struct dentry *adfs_mount(struct file_system_type *fs_type,
+	int flags, const char *dev_name, void *data)
 {
-	return get_sb_bdev(fs_type, flags, dev_name, data, adfs_fill_super,
-			   mnt);
+	return mount_bdev(fs_type, flags, dev_name, data, adfs_fill_super);
 }
 
 static struct file_system_type adfs_fs_type = {
 	.owner		= THIS_MODULE,
 	.name		= "adfs",
-	.get_sb		= adfs_get_sb,
+	.mount		= adfs_mount,
 	.kill_sb	= kill_block_super,
 	.fs_flags	= FS_REQUIRES_DEV,
 };
+MODULE_ALIAS_FS("adfs");
 
 static int __init init_adfs_fs(void)
 {
@@ -530,3 +549,4 @@ static void __exit exit_adfs_fs(void)
 
 module_init(init_adfs_fs)
 module_exit(exit_adfs_fs)
+MODULE_LICENSE("GPL");
diff --git a/fs/affs/Changes b/fs/affs/Changes
index a29409c1ffe..b41c2c9792f 100644
--- a/fs/affs/Changes
+++ b/fs/affs/Changes
@@ -91,7 +91,7 @@ more 2.4 fixes: [Roman Zippel]
 Version 3.11
 ------------
 
-- Converted to use 2.3.x page cache [Dave Jones <dave@powertweak.com>]
+- Converted to use 2.3.x page cache [Dave Jones]
 - Corruption in truncate() bugfix [Ken Tyler <kent@werple.net.au>]
 
 Version 3.10
diff --git a/fs/affs/Kconfig b/fs/affs/Kconfig
index cfad9afb476..a04d9e848d0 100644
--- a/fs/affs/Kconfig
+++ b/fs/affs/Kconfig
@@ -1,6 +1,6 @@
 config AFFS_FS
-	tristate "Amiga FFS file system support (EXPERIMENTAL)"
-	depends on BLOCK && EXPERIMENTAL
+	tristate "Amiga FFS file system support"
+	depends on BLOCK
 	help
 	  The Fast File System (FFS) is the common file system used on hard
 	  disks by Amiga(tm) systems since AmigaOS Version 1.3 (34.20).  Say Y
diff --git a/fs/affs/Makefile b/fs/affs/Makefile
index b2c4f54446f..3988b4a7833 100644
--- a/fs/affs/Makefile
+++ b/fs/affs/Makefile
@@ -2,7 +2,7 @@
 # Makefile for the Linux affs filesystem routines.
 #
 
-#EXTRA_CFLAGS=-DDEBUG=1
+#ccflags-y := -DDEBUG=1
 
 obj-$(CONFIG_AFFS_FS) += affs.o
 
diff --git a/fs/affs/affs.h b/fs/affs/affs.h
index 1a2d5e3c7f4..9bca8815972 100644
--- a/fs/affs/affs.h
+++ b/fs/affs/affs.h
@@ -1,16 +1,15 @@
+#ifdef pr_fmt
+#undef pr_fmt
+#endif
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/types.h>
 #include <linux/fs.h>
 #include <linux/buffer_head.h>
 #include <linux/amigaffs.h>
 #include <linux/mutex.h>
-
-/* AmigaOS allows file names with up to 30 characters length.
- * Names longer than that will be silently truncated. If you
- * want to disallow this, comment out the following #define.
- * Creating filesystem objects with longer names will then
- * result in an error (ENAMETOOLONG).
- */
-/*#define AFFS_NO_TRUNCATE */
+#include <linux/workqueue.h>
 
 /* Ugly macros make the code more pretty. */
 
@@ -18,14 +17,6 @@
 #define AFFS_GET_HASHENTRY(data,hashkey) be32_to_cpu(((struct dir_front *)data)->hashtable[hashkey])
 #define AFFS_BLOCK(sb, bh, blk)		(AFFS_HEAD(bh)->table[AFFS_SB(sb)->s_hashsize-1-(blk)])
 
-#ifdef __LITTLE_ENDIAN
-#define BO_EXBITS	0x18UL
-#elif defined(__BIG_ENDIAN)
-#define BO_EXBITS	0x00UL
-#else
-#error Endianness must be known for affs to work.
-#endif
-
 #define AFFS_HEAD(bh)		((struct affs_head *)(bh)->b_data)
 #define AFFS_TAIL(sb, bh)	((struct affs_tail *)((bh)->b_data+(sb)->s_blocksize-sizeof(struct affs_tail)))
 #define AFFS_ROOT_HEAD(bh)	((struct affs_root_head *)(bh)->b_data)
@@ -35,7 +26,6 @@
 
 #define AFFS_CACHE_SIZE		PAGE_SIZE
 
-#define AFFS_MAX_PREALLOC	32
 #define AFFS_LC_SIZE		(AFFS_CACHE_SIZE/sizeof(u32)/2)
 #define AFFS_AC_SIZE		(AFFS_CACHE_SIZE/sizeof(struct affs_ext_key)/2)
 #define AFFS_AC_MASK		(AFFS_AC_SIZE-1)
@@ -95,8 +85,8 @@ struct affs_sb_info {
 	u32 s_root_block;		/* FFS root block number. */
 	int s_hashsize;			/* Size of hash table. */
 	unsigned long s_flags;		/* See below. */
-	uid_t s_uid;			/* uid to override */
-	gid_t s_gid;			/* gid to override */
+	kuid_t s_uid;			/* uid to override */
+	kgid_t s_gid;			/* gid to override */
 	umode_t s_mode;			/* mode to override */
 	struct buffer_head *s_root_bh;	/* Cached root block. */
 	struct mutex s_bmlock;		/* Protects bitmap access. */
@@ -106,8 +96,12 @@ struct affs_sb_info {
 	u32 s_last_bmap;
 	struct buffer_head *s_bmap_bh;
 	char *s_prefix;			/* Prefix for volumes and assigns. */
-	int s_prefix_len;		/* Length of prefix. */
 	char s_volume[32];		/* Volume prefix for absolute symlinks. */
+	spinlock_t symlink_lock;	/* protects the previous two */
+	struct super_block *sb;		/* the VFS superblock object */
+	int work_queued;		/* non-zero delayed work is queued */
+	struct delayed_work sb_work;	/* superblock flush delayed work */
+	spinlock_t work_lock;		/* protects sb_work and work_queued */
 };
 
 #define SF_INTL		0x0001		/* International filesystem. */
@@ -121,6 +115,7 @@ struct affs_sb_info {
 #define SF_OFS		0x0200		/* Old filesystem */
 #define SF_PREFIX	0x0400		/* Buffer for prefix is allocated */
 #define SF_VERBOSE	0x0800		/* Talk about fs when mounting */
+#define SF_NO_TRUNCATE	0x1000		/* Don't truncate filenames */
 
 /* short cut to get to the affs specific sb data */
 static inline struct affs_sb_info *AFFS_SB(struct super_block *sb)
@@ -128,6 +123,8 @@ static inline struct affs_sb_info *AFFS_SB(struct super_block *sb)
 	return sb->s_fs_info;
 }
 
+void affs_mark_sb_dirty(struct super_block *sb);
+
 /* amigaffs.c */
 
 extern int	affs_insert_hash(struct inode *inode, struct buffer_head *bh);
@@ -136,11 +133,15 @@ extern int	affs_remove_header(struct dentry *dentry);
 extern u32	affs_checksum_block(struct super_block *sb, struct buffer_head *bh);
 extern void	affs_fix_checksum(struct super_block *sb, struct buffer_head *bh);
 extern void	secs_to_datestamp(time_t secs, struct affs_date *ds);
-extern mode_t	prot_to_mode(u32 prot);
+extern umode_t	prot_to_mode(u32 prot);
 extern void	mode_to_prot(struct inode *inode);
-extern void	affs_error(struct super_block *sb, const char *function, const char *fmt, ...);
-extern void	affs_warning(struct super_block *sb, const char *function, const char *fmt, ...);
-extern int	affs_check_name(const unsigned char *name, int len);
+extern void	affs_error(struct super_block *sb, const char *function,
+			   const char *fmt, ...);
+extern void	affs_warning(struct super_block *sb, const char *function,
+			     const char *fmt, ...);
+extern bool	affs_nofilenametruncate(const struct dentry *dentry);
+extern int	affs_check_name(const unsigned char *name, int len,
+				bool notruncate);
 extern int	affs_copy_name(unsigned char *bstr, struct dentry *dentry);
 
 /* bitmap. c */
@@ -154,10 +155,10 @@ extern void	affs_free_bitmap(struct super_block *sb);
 /* namei.c */
 
 extern int	affs_hash_name(struct super_block *sb, const u8 *name, unsigned int len);
-extern struct dentry *affs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *);
+extern struct dentry *affs_lookup(struct inode *dir, struct dentry *dentry, unsigned int);
 extern int	affs_unlink(struct inode *dir, struct dentry *dentry);
-extern int	affs_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *);
-extern int	affs_mkdir(struct inode *dir, struct dentry *dentry, int mode);
+extern int	affs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool);
+extern int	affs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode);
 extern int	affs_rmdir(struct inode *dir, struct dentry *dentry);
 extern int	affs_link(struct dentry *olddentry, struct inode *dir,
 			  struct dentry *dentry);
@@ -171,17 +172,18 @@ extern int	affs_rename(struct inode *old_dir, struct dentry *old_dentry,
 extern unsigned long		 affs_parent_ino(struct inode *dir);
 extern struct inode		*affs_new_inode(struct inode *dir);
 extern int			 affs_notify_change(struct dentry *dentry, struct iattr *attr);
-extern void			 affs_delete_inode(struct inode *inode);
-extern void			 affs_clear_inode(struct inode *inode);
+extern void			 affs_evict_inode(struct inode *inode);
 extern struct inode		*affs_iget(struct super_block *sb,
 					unsigned long ino);
-extern int			 affs_write_inode(struct inode *inode, int);
+extern int			 affs_write_inode(struct inode *inode,
+					struct writeback_control *wbc);
 extern int			 affs_add_entry(struct inode *dir, struct inode *inode, struct dentry *dentry, s32 type);
 
 /* file.c */
 
 void		affs_free_prealloc(struct inode *inode);
 extern void	affs_truncate(struct inode *);
+int		affs_file_fsync(struct file *, loff_t, loff_t, int);
 
 /* dir.c */
 
@@ -200,6 +202,7 @@ extern const struct address_space_operations	 affs_aops;
 extern const struct address_space_operations	 affs_aops_ofs;
 
 extern const struct dentry_operations	 affs_dentry_operations;
+extern const struct dentry_operations	 affs_intl_dentry_operations;
 
 static inline void
 affs_set_blocksize(struct super_block *sb, int size)
@@ -209,7 +212,7 @@ affs_set_blocksize(struct super_block *sb, int size)
 static inline struct buffer_head *
 affs_bread(struct super_block *sb, int block)
 {
-	pr_debug("affs_bread: %d\n", block);
+	pr_debug("%s: %d\n", __func__, block);
 	if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size)
 		return sb_bread(sb, block);
 	return NULL;
@@ -217,7 +220,7 @@ affs_bread(struct super_block *sb, int block)
 static inline struct buffer_head *
 affs_getblk(struct super_block *sb, int block)
 {
-	pr_debug("affs_getblk: %d\n", block);
+	pr_debug("%s: %d\n", __func__, block);
 	if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size)
 		return sb_getblk(sb, block);
 	return NULL;
@@ -226,7 +229,7 @@ static inline struct buffer_head *
 affs_getzeroblk(struct super_block *sb, int block)
 {
 	struct buffer_head *bh;
-	pr_debug("affs_getzeroblk: %d\n", block);
+	pr_debug("%s: %d\n", __func__, block);
 	if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size) {
 		bh = sb_getblk(sb, block);
 		lock_buffer(bh);
@@ -241,7 +244,7 @@ static inline struct buffer_head *
 affs_getemptyblk(struct super_block *sb, int block)
 {
 	struct buffer_head *bh;
-	pr_debug("affs_getemptyblk: %d\n", block);
+	pr_debug("%s: %d\n", __func__, block);
 	if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size) {
 		bh = sb_getblk(sb, block);
 		wait_on_buffer(bh);
@@ -254,7 +257,7 @@ static inline void
 affs_brelse(struct buffer_head *bh)
 {
 	if (bh)
-		pr_debug("affs_brelse: %lld\n", (long long) bh->b_blocknr);
+		pr_debug("%s: %lld\n", __func__, (long long) bh->b_blocknr);
 	brelse(bh);
 }
 
diff --git a/fs/affs/amigaffs.c b/fs/affs/amigaffs.c
index 7d0f0a30f7a..406b29836b1 100644
--- a/fs/affs/amigaffs.c
+++ b/fs/affs/amigaffs.c
@@ -34,7 +34,7 @@ affs_insert_hash(struct inode *dir, struct buffer_head *bh)
 	ino = bh->b_blocknr;
 	offset = affs_hash_name(sb, AFFS_TAIL(sb, bh)->name + 1, AFFS_TAIL(sb, bh)->name[0]);
 
-	pr_debug("AFFS: insert_hash(dir=%u, ino=%d)\n", (u32)dir->i_ino, ino);
+	pr_debug("%s(dir=%u, ino=%d)\n", __func__, (u32)dir->i_ino, ino);
 
 	dir_bh = affs_bread(sb, dir->i_ino);
 	if (!dir_bh)
@@ -84,7 +84,8 @@ affs_remove_hash(struct inode *dir, struct buffer_head *rem_bh)
 	sb = dir->i_sb;
 	rem_ino = rem_bh->b_blocknr;
 	offset = affs_hash_name(sb, AFFS_TAIL(sb, rem_bh)->name+1, AFFS_TAIL(sb, rem_bh)->name[0]);
-	pr_debug("AFFS: remove_hash(dir=%d, ino=%d, hashval=%d)\n", (u32)dir->i_ino, rem_ino, offset);
+	pr_debug("%s(dir=%d, ino=%d, hashval=%d)\n",
+		 __func__, (u32)dir->i_ino, rem_ino, offset);
 
 	bh = affs_bread(sb, dir->i_ino);
 	if (!bh)
@@ -122,24 +123,17 @@ affs_remove_hash(struct inode *dir, struct buffer_head *rem_bh)
 }
 
 static void
-affs_fix_dcache(struct dentry *dentry, u32 entry_ino)
+affs_fix_dcache(struct inode *inode, u32 entry_ino)
 {
-	struct inode *inode = dentry->d_inode;
-	void *data = dentry->d_fsdata;
-	struct list_head *head, *next;
-
-	spin_lock(&dcache_lock);
-	head = &inode->i_dentry;
-	next = head->next;
-	while (next != head) {
-		dentry = list_entry(next, struct dentry, d_alias);
+	struct dentry *dentry;
+	spin_lock(&inode->i_lock);
+	hlist_for_each_entry(dentry, &inode->i_dentry, d_alias) {
 		if (entry_ino == (u32)(long)dentry->d_fsdata) {
-			dentry->d_fsdata = data;
+			dentry->d_fsdata = (void *)inode->i_ino;
 			break;
 		}
-		next = next->next;
 	}
-	spin_unlock(&dcache_lock);
+	spin_unlock(&inode->i_lock);
 }
 
 
@@ -154,7 +148,7 @@ affs_remove_link(struct dentry *dentry)
 	u32 link_ino, ino;
 	int retval;
 
-	pr_debug("AFFS: remove_link(key=%ld)\n", inode->i_ino);
+	pr_debug("%s(key=%ld)\n", __func__, inode->i_ino);
 	retval = -EIO;
 	bh = affs_bread(sb, inode->i_ino);
 	if (!bh)
@@ -177,7 +171,11 @@ affs_remove_link(struct dentry *dentry)
 		}
 
 		affs_lock_dir(dir);
-		affs_fix_dcache(dentry, link_ino);
+		/*
+		 * if there's a dentry for that block, make it
+		 * refer to inode itself.
+		 */
+		affs_fix_dcache(inode, link_ino);
 		retval = affs_remove_hash(dir, link_bh);
 		if (retval) {
 			affs_unlock_dir(dir);
@@ -215,7 +213,7 @@ affs_remove_link(struct dentry *dentry)
 				break;
 			default:
 				if (!AFFS_TAIL(sb, bh)->link_chain)
-					inode->i_nlink = 1;
+					set_nlink(inode, 1);
 			}
 			affs_free_block(sb, link_ino);
 			goto done;
@@ -282,7 +280,7 @@ affs_remove_header(struct dentry *dentry)
 	if (!inode)
 		goto done;
 
-	pr_debug("AFFS: remove_header(key=%ld)\n", inode->i_ino);
+	pr_debug("%s(key=%ld)\n", __func__, inode->i_ino);
 	retval = -EIO;
 	bh = affs_bread(sb, (u32)(long)dentry->d_fsdata);
 	if (!bh)
@@ -316,7 +314,7 @@ affs_remove_header(struct dentry *dentry)
 	if (inode->i_nlink > 1)
 		retval = affs_remove_link(dentry);
 	else
-		inode->i_nlink = 0;
+		clear_nlink(inode);
 	affs_unlock_link(inode);
 	inode->i_ctime = CURRENT_TIME_SEC;
 	mark_inode_dirty(inode);
@@ -390,10 +388,10 @@ secs_to_datestamp(time_t secs, struct affs_date *ds)
 	ds->ticks = cpu_to_be32(secs * 50);
 }
 
-mode_t
+umode_t
 prot_to_mode(u32 prot)
 {
-	int mode = 0;
+	umode_t mode = 0;
 
 	if (!(prot & FIBF_NOWRITE))
 		mode |= S_IWUSR;
@@ -421,7 +419,7 @@ void
 mode_to_prot(struct inode *inode)
 {
 	u32 prot = AFFS_I(inode)->i_protect;
-	mode_t mode = inode->i_mode;
+	umode_t mode = inode->i_mode;
 
 	if (!(mode & S_IXUSR))
 		prot |= FIBF_NOEXECUTE;
@@ -454,10 +452,10 @@ affs_error(struct super_block *sb, const char *function, const char *fmt, ...)
 	vsnprintf(ErrorBuffer,sizeof(ErrorBuffer),fmt,args);
 	va_end(args);
 
-	printk(KERN_CRIT "AFFS error (device %s): %s(): %s\n", sb->s_id,
+	pr_crit("error (device %s): %s(): %s\n", sb->s_id,
 		function,ErrorBuffer);
 	if (!(sb->s_flags & MS_RDONLY))
-		printk(KERN_WARNING "AFFS: Remounting filesystem read-only\n");
+		pr_warn("Remounting filesystem read-only\n");
 	sb->s_flags |= MS_RDONLY;
 }
 
@@ -470,24 +468,31 @@ affs_warning(struct super_block *sb, const char *function, const char *fmt, ...)
 	vsnprintf(ErrorBuffer,sizeof(ErrorBuffer),fmt,args);
 	va_end(args);
 
-	printk(KERN_WARNING "AFFS warning (device %s): %s(): %s\n", sb->s_id,
+	pr_warn("(device %s): %s(): %s\n", sb->s_id,
 		function,ErrorBuffer);
 }
 
+bool
+affs_nofilenametruncate(const struct dentry *dentry)
+{
+	struct inode *inode = dentry->d_inode;
+	return AFFS_SB(inode->i_sb)->s_flags & SF_NO_TRUNCATE;
+
+}
+
 /* Check if the name is valid for a affs object. */
 
 int
-affs_check_name(const unsigned char *name, int len)
+affs_check_name(const unsigned char *name, int len, bool notruncate)
 {
 	int	 i;
 
-	if (len > 30)
-#ifdef AFFS_NO_TRUNCATE
-		return -ENAMETOOLONG;
-#else
-		len = 30;
-#endif
-
+	if (len > 30) {
+		if (notruncate)
+			return -ENAMETOOLONG;
+		else
+			len = 30;
+	}
 	for (i = 0; i < len; i++) {
 		if (name[i] < ' ' || name[i] == ':'
 		    || (name[i] > 0x7e && name[i] < 0xa0))
diff --git a/fs/affs/bitmap.c b/fs/affs/bitmap.c
index dc5ef14bdc1..c8de51185c2 100644
--- a/fs/affs/bitmap.c
+++ b/fs/affs/bitmap.c
@@ -7,32 +7,9 @@
  *  block allocation, deallocation, calculation of free space.
  */
 
+#include <linux/slab.h>
 #include "affs.h"
 
-/* This is, of course, shamelessly stolen from fs/minix */
-
-static const int nibblemap[] = { 0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4 };
-
-static u32
-affs_count_free_bits(u32 blocksize, const void *data)
-{
-	const u32 *map;
-	u32 free;
-	u32 tmp;
-
-	map = data;
-	free = 0;
-	for (blocksize /= 4; blocksize > 0; blocksize--) {
-		tmp = *map++;
-		while (tmp) {
-			free += nibblemap[tmp & 0xf];
-			tmp >>= 4;
-		}
-	}
-
-	return free;
-}
-
 u32
 affs_count_free_blocks(struct super_block *sb)
 {
@@ -40,7 +17,7 @@ affs_count_free_blocks(struct super_block *sb)
 	u32 free;
 	int i;
 
-	pr_debug("AFFS: count_free_blocks()\n");
+	pr_debug("%s()\n", __func__);
 
 	if (sb->s_flags & MS_RDONLY)
 		return 0;
@@ -66,7 +43,7 @@ affs_free_block(struct super_block *sb, u32 block)
 	u32 blk, bmap, bit, mask, tmp;
 	__be32 *data;
 
-	pr_debug("AFFS: free_block(%u)\n", block);
+	pr_debug("%s(%u)\n", __func__, block);
 
 	if (block > sbi->s_partition_size)
 		goto err_range;
@@ -102,7 +79,7 @@ affs_free_block(struct super_block *sb, u32 block)
 	*(__be32 *)bh->b_data = cpu_to_be32(tmp - mask);
 
 	mark_buffer_dirty(bh);
-	sb->s_dirt = 1;
+	affs_mark_sb_dirty(sb);
 	bm->bm_free++;
 
 	mutex_unlock(&sbi->s_bmlock);
@@ -128,7 +105,7 @@ err_range:
 /*
  * Allocate a block in the given allocation zone.
  * Since we have to byte-swap the bitmap on little-endian
- * machines, this is rather expensive. Therefor we will
+ * machines, this is rather expensive. Therefore we will
  * preallocate up to 16 blocks from the same word, if
  * possible. We are not doing preallocations in the
  * header zone, though.
@@ -148,7 +125,7 @@ affs_alloc_block(struct inode *inode, u32 goal)
 	sb = inode->i_sb;
 	sbi = AFFS_SB(sb);
 
-	pr_debug("AFFS: balloc(inode=%lu,goal=%u): ", inode->i_ino, goal);
+	pr_debug("balloc(inode=%lu,goal=%u): ", inode->i_ino, goal);
 
 	if (AFFS_I(inode)->i_pa_cnt) {
 		pr_debug("%d\n", AFFS_I(inode)->i_lastalloc+1);
@@ -247,7 +224,7 @@ find_bit:
 	*(__be32 *)bh->b_data = cpu_to_be32(tmp + mask);
 
 	mark_buffer_dirty(bh);
-	sb->s_dirt = 1;
+	affs_mark_sb_dirty(sb);
 
 	mutex_unlock(&sbi->s_bmlock);
 
@@ -277,8 +254,7 @@ int affs_init_bitmap(struct super_block *sb, int *flags)
 		return 0;
 
 	if (!AFFS_ROOT_TAIL(sb, sbi->s_root_bh)->bm_flag) {
-		printk(KERN_NOTICE "AFFS: Bitmap invalid - mounting %s read only\n",
-			sb->s_id);
+		pr_notice("Bitmap invalid - mounting %s read only\n", sb->s_id);
 		*flags |= MS_RDONLY;
 		return 0;
 	}
@@ -291,7 +267,7 @@ int affs_init_bitmap(struct super_block *sb, int *flags)
 	size = sbi->s_bmap_count * sizeof(*bm);
 	bm = sbi->s_bitmap = kzalloc(size, GFP_KERNEL);
 	if (!sbi->s_bitmap) {
-		printk(KERN_ERR "AFFS: Bitmap allocation failed\n");
+		pr_err("Bitmap allocation failed\n");
 		return -ENOMEM;
 	}
 
@@ -305,18 +281,18 @@ int affs_init_bitmap(struct super_block *sb, int *flags)
 		bm->bm_key = be32_to_cpu(bmap_blk[blk]);
 		bh = affs_bread(sb, bm->bm_key);
 		if (!bh) {
-			printk(KERN_ERR "AFFS: Cannot read bitmap\n");
+			pr_err("Cannot read bitmap\n");
 			res = -EIO;
 			goto out;
 		}
 		if (affs_checksum_block(sb, bh)) {
-			printk(KERN_WARNING "AFFS: Bitmap %u invalid - mounting %s read only.\n",
-			       bm->bm_key, sb->s_id);
+			pr_warn("Bitmap %u invalid - mounting %s read only.\n",
+				bm->bm_key, sb->s_id);
 			*flags |= MS_RDONLY;
 			goto out;
 		}
-		pr_debug("AFFS: read bitmap block %d: %d\n", blk, bm->bm_key);
-		bm->bm_free = affs_count_free_bits(sb->s_blocksize - 4, bh->b_data + 4);
+		pr_debug("read bitmap block %d: %d\n", blk, bm->bm_key);
+		bm->bm_free = memweight(bh->b_data + 4, sb->s_blocksize - 4);
 
 		/* Don't try read the extension if this is the last block,
 		 * but we also need the right bm pointer below
@@ -327,7 +303,7 @@ int affs_init_bitmap(struct super_block *sb, int *flags)
 			affs_brelse(bmap_bh);
 		bmap_bh = affs_bread(sb, be32_to_cpu(bmap_blk[blk]));
 		if (!bmap_bh) {
-			printk(KERN_ERR "AFFS: Cannot read bitmap extension\n");
+			pr_err("Cannot read bitmap extension\n");
 			res = -EIO;
 			goto out;
 		}
@@ -366,7 +342,7 @@ int affs_init_bitmap(struct super_block *sb, int *flags)
 
 	/* recalculate bitmap count for last block */
 	bm--;
-	bm->bm_free = affs_count_free_bits(sb->s_blocksize - 4, bh->b_data + 4);
+	bm->bm_free = memweight(bh->b_data + 4, sb->s_blocksize - 4);
 
 out:
 	affs_brelse(bh);
diff --git a/fs/affs/dir.c b/fs/affs/dir.c
index 7b36904dbea..59f07bec92a 100644
--- a/fs/affs/dir.c
+++ b/fs/affs/dir.c
@@ -15,13 +15,13 @@
 
 #include "affs.h"
 
-static int affs_readdir(struct file *, void *, filldir_t);
+static int affs_readdir(struct file *, struct dir_context *);
 
 const struct file_operations affs_dir_operations = {
 	.read		= generic_read_dir,
 	.llseek		= generic_file_llseek,
-	.readdir	= affs_readdir,
-	.fsync		= file_fsync,
+	.iterate	= affs_readdir,
+	.fsync		= affs_file_fsync,
 };
 
 /*
@@ -40,63 +40,48 @@ const struct inode_operations affs_dir_inode_operations = {
 };
 
 static int
-affs_readdir(struct file *filp, void *dirent, filldir_t filldir)
+affs_readdir(struct file *file, struct dir_context *ctx)
 {
-	struct inode		*inode = filp->f_path.dentry->d_inode;
+	struct inode		*inode = file_inode(file);
 	struct super_block	*sb = inode->i_sb;
-	struct buffer_head	*dir_bh;
-	struct buffer_head	*fh_bh;
+	struct buffer_head	*dir_bh = NULL;
+	struct buffer_head	*fh_bh = NULL;
 	unsigned char		*name;
 	int			 namelen;
 	u32			 i;
 	int			 hash_pos;
 	int			 chain_pos;
-	u32			 f_pos;
 	u32			 ino;
-	int			 stored;
-	int			 res;
+	int			 error = 0;
 
-	pr_debug("AFFS: readdir(ino=%lu,f_pos=%lx)\n",inode->i_ino,(unsigned long)filp->f_pos);
+	pr_debug("%s(ino=%lu,f_pos=%lx)\n",
+		 __func__, inode->i_ino, (unsigned long)ctx->pos);
 
-	stored = 0;
-	res    = -EIO;
-	dir_bh = NULL;
-	fh_bh  = NULL;
-	f_pos  = filp->f_pos;
-
-	if (f_pos == 0) {
-		filp->private_data = (void *)0;
-		if (filldir(dirent, ".", 1, f_pos, inode->i_ino, DT_DIR) < 0)
+	if (ctx->pos < 2) {
+		file->private_data = (void *)0;
+		if (!dir_emit_dots(file, ctx))
 			return 0;
-		filp->f_pos = f_pos = 1;
-		stored++;
-	}
-	if (f_pos == 1) {
-		if (filldir(dirent, "..", 2, f_pos, parent_ino(filp->f_path.dentry), DT_DIR) < 0)
-			return stored;
-		filp->f_pos = f_pos = 2;
-		stored++;
 	}
 
 	affs_lock_dir(inode);
-	chain_pos = (f_pos - 2) & 0xffff;
-	hash_pos  = (f_pos - 2) >> 16;
+	chain_pos = (ctx->pos - 2) & 0xffff;
+	hash_pos  = (ctx->pos - 2) >> 16;
 	if (chain_pos == 0xffff) {
 		affs_warning(sb, "readdir", "More than 65535 entries in chain");
 		chain_pos = 0;
 		hash_pos++;
-		filp->f_pos = ((hash_pos << 16) | chain_pos) + 2;
+		ctx->pos = ((hash_pos << 16) | chain_pos) + 2;
 	}
 	dir_bh = affs_bread(sb, inode->i_ino);
 	if (!dir_bh)
-		goto readdir_out;
+		goto out_unlock_dir;
 
 	/* If the directory hasn't changed since the last call to readdir(),
 	 * we can jump directly to where we left off.
 	 */
-	ino = (u32)(long)filp->private_data;
-	if (ino && filp->f_version == inode->i_version) {
-		pr_debug("AFFS: readdir() left off=%d\n", ino);
+	ino = (u32)(long)file->private_data;
+	if (ino && file->f_version == inode->i_version) {
+		pr_debug("readdir() left off=%d\n", ino);
 		goto inside;
 	}
 
@@ -105,7 +90,8 @@ affs_readdir(struct file *filp, void *dirent, filldir_t filldir)
 		fh_bh = affs_bread(sb, ino);
 		if (!fh_bh) {
 			affs_error(sb, "readdir","Cannot read block %d", i);
-			goto readdir_out;
+			error = -EIO;
+			goto out_brelse_dir;
 		}
 		ino = be32_to_cpu(AFFS_TAIL(sb, fh_bh)->hash_chain);
 		affs_brelse(fh_bh);
@@ -119,38 +105,39 @@ affs_readdir(struct file *filp, void *dirent, filldir_t filldir)
 		ino = be32_to_cpu(AFFS_HEAD(dir_bh)->table[hash_pos]);
 		if (!ino)
 			continue;
-		f_pos = (hash_pos << 16) + 2;
+		ctx->pos = (hash_pos << 16) + 2;
 inside:
 		do {
 			fh_bh = affs_bread(sb, ino);
 			if (!fh_bh) {
-				affs_error(sb, "readdir","Cannot read block %d", ino);
-				goto readdir_done;
+				affs_error(sb, "readdir",
+					   "Cannot read block %d", ino);
+				break;
 			}
 
 			namelen = min(AFFS_TAIL(sb, fh_bh)->name[0], (u8)30);
 			name = AFFS_TAIL(sb, fh_bh)->name + 1;
-			pr_debug("AFFS: readdir(): filldir(\"%.*s\", ino=%u), hash=%d, f_pos=%x\n",
-				 namelen, name, ino, hash_pos, f_pos);
-			if (filldir(dirent, name, namelen, f_pos, ino, DT_UNKNOWN) < 0)
-				goto readdir_done;
-			stored++;
-			f_pos++;
+			pr_debug("readdir(): dir_emit(\"%.*s\", "
+				 "ino=%u), hash=%d, f_pos=%x\n",
+				 namelen, name, ino, hash_pos, (u32)ctx->pos);
+
+			if (!dir_emit(ctx, name, namelen, ino, DT_UNKNOWN))
+				goto done;
+			ctx->pos++;
 			ino = be32_to_cpu(AFFS_TAIL(sb, fh_bh)->hash_chain);
 			affs_brelse(fh_bh);
 			fh_bh = NULL;
 		} while (ino);
 	}
-readdir_done:
-	filp->f_pos = f_pos;
-	filp->f_version = inode->i_version;
-	filp->private_data = (void *)(long)ino;
-	res = stored;
+done:
+	file->f_version = inode->i_version;
+	file->private_data = (void *)(long)ino;
+	affs_brelse(fh_bh);
 
-readdir_out:
+out_brelse_dir:
 	affs_brelse(dir_bh);
-	affs_brelse(fh_bh);
+
+out_unlock_dir:
 	affs_unlock_dir(inode);
-	pr_debug("AFFS: readdir()=%d\n", stored);
-	return res;
+	return error;
 }
diff --git a/fs/affs/file.c b/fs/affs/file.c
index 9246cb4aa01..a7fe57d2cd9 100644
--- a/fs/affs/file.c
+++ b/fs/affs/file.c
@@ -27,26 +27,25 @@ static int affs_file_release(struct inode *inode, struct file *filp);
 
 const struct file_operations affs_file_operations = {
 	.llseek		= generic_file_llseek,
-	.read		= do_sync_read,
-	.aio_read	= generic_file_aio_read,
-	.write		= do_sync_write,
-	.aio_write	= generic_file_aio_write,
+	.read		= new_sync_read,
+	.read_iter	= generic_file_read_iter,
+	.write		= new_sync_write,
+	.write_iter	= generic_file_write_iter,
 	.mmap		= generic_file_mmap,
 	.open		= affs_file_open,
 	.release	= affs_file_release,
-	.fsync		= file_fsync,
+	.fsync		= affs_file_fsync,
 	.splice_read	= generic_file_splice_read,
 };
 
 const struct inode_operations affs_file_inode_operations = {
-	.truncate	= affs_truncate,
 	.setattr	= affs_notify_change,
 };
 
 static int
 affs_file_open(struct inode *inode, struct file *filp)
 {
-	pr_debug("AFFS: open(%lu,%d)\n",
+	pr_debug("open(%lu,%d)\n",
 		 inode->i_ino, atomic_read(&AFFS_I(inode)->i_opencnt));
 	atomic_inc(&AFFS_I(inode)->i_opencnt);
 	return 0;
@@ -55,7 +54,7 @@ affs_file_open(struct inode *inode, struct file *filp)
 static int
 affs_file_release(struct inode *inode, struct file *filp)
 {
-	pr_debug("AFFS: release(%lu, %d)\n",
+	pr_debug("release(%lu, %d)\n",
 		 inode->i_ino, atomic_read(&AFFS_I(inode)->i_opencnt));
 
 	if (atomic_dec_and_test(&AFFS_I(inode)->i_opencnt)) {
@@ -325,7 +324,8 @@ affs_get_block(struct inode *inode, sector_t block, struct buffer_head *bh_resul
 	struct buffer_head	*ext_bh;
 	u32			 ext;
 
-	pr_debug("AFFS: get_block(%u, %lu)\n", (u32)inode->i_ino, (unsigned long)block);
+	pr_debug("%s(%u, %lu)\n",
+		 __func__, (u32)inode->i_ino, (unsigned long)block);
 
 	BUG_ON(block > (sector_t)0x7fffffffUL);
 
@@ -402,14 +402,30 @@ static int affs_readpage(struct file *file, struct page *page)
 	return block_read_full_page(page, affs_get_block);
 }
 
+static void affs_write_failed(struct address_space *mapping, loff_t to)
+{
+	struct inode *inode = mapping->host;
+
+	if (to > inode->i_size) {
+		truncate_pagecache(inode, inode->i_size);
+		affs_truncate(inode);
+	}
+}
+
 static int affs_write_begin(struct file *file, struct address_space *mapping,
 			loff_t pos, unsigned len, unsigned flags,
 			struct page **pagep, void **fsdata)
 {
+	int ret;
+
 	*pagep = NULL;
-	return cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
+	ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
 				affs_get_block,
 				&AFFS_I(mapping->host)->mmu_private);
+	if (unlikely(ret))
+		affs_write_failed(mapping, pos + len);
+
+	return ret;
 }
 
 static sector_t _affs_bmap(struct address_space *mapping, sector_t block)
@@ -420,7 +436,6 @@ static sector_t _affs_bmap(struct address_space *mapping, sector_t block)
 const struct address_space_operations affs_aops = {
 	.readpage = affs_readpage,
 	.writepage = affs_writepage,
-	.sync_page = block_sync_page,
 	.write_begin = affs_write_begin,
 	.write_end = generic_write_end,
 	.bmap = _affs_bmap
@@ -484,34 +499,36 @@ affs_getemptyblk_ino(struct inode *inode, int block)
 }
 
 static int
-affs_do_readpage_ofs(struct file *file, struct page *page, unsigned from, unsigned to)
+affs_do_readpage_ofs(struct page *page, unsigned to)
 {
 	struct inode *inode = page->mapping->host;
 	struct super_block *sb = inode->i_sb;
 	struct buffer_head *bh;
 	char *data;
+	unsigned pos = 0;
 	u32 bidx, boff, bsize;
 	u32 tmp;
 
-	pr_debug("AFFS: read_page(%u, %ld, %d, %d)\n", (u32)inode->i_ino, page->index, from, to);
-	BUG_ON(from > to || to > PAGE_CACHE_SIZE);
+	pr_debug("%s(%u, %ld, 0, %d)\n", __func__, (u32)inode->i_ino,
+		 page->index, to);
+	BUG_ON(to > PAGE_CACHE_SIZE);
 	kmap(page);
 	data = page_address(page);
 	bsize = AFFS_SB(sb)->s_data_blksize;
-	tmp = (page->index << PAGE_CACHE_SHIFT) + from;
+	tmp = page->index << PAGE_CACHE_SHIFT;
 	bidx = tmp / bsize;
 	boff = tmp % bsize;
 
-	while (from < to) {
+	while (pos < to) {
 		bh = affs_bread_ino(inode, bidx, 0);
 		if (IS_ERR(bh))
 			return PTR_ERR(bh);
-		tmp = min(bsize - boff, to - from);
-		BUG_ON(from + tmp > to || tmp > bsize);
-		memcpy(data + from, AFFS_DATA(bh) + boff, tmp);
+		tmp = min(bsize - boff, to - pos);
+		BUG_ON(pos + tmp > to || tmp > bsize);
+		memcpy(data + pos, AFFS_DATA(bh) + boff, tmp);
 		affs_brelse(bh);
 		bidx++;
-		from += tmp;
+		pos += tmp;
 		boff = 0;
 	}
 	flush_dcache_page(page);
@@ -528,7 +545,7 @@ affs_extent_file_ofs(struct inode *inode, u32 newsize)
 	u32 size, bsize;
 	u32 tmp;
 
-	pr_debug("AFFS: extent_file(%u, %d)\n", (u32)inode->i_ino, newsize);
+	pr_debug("%s(%u, %d)\n", __func__, (u32)inode->i_ino, newsize);
 	bsize = AFFS_SB(sb)->s_data_blksize;
 	bh = NULL;
 	size = AFFS_I(inode)->mmu_private;
@@ -594,14 +611,14 @@ affs_readpage_ofs(struct file *file, struct page *page)
 	u32 to;
 	int err;
 
-	pr_debug("AFFS: read_page(%u, %ld)\n", (u32)inode->i_ino, page->index);
+	pr_debug("%s(%u, %ld)\n", __func__, (u32)inode->i_ino, page->index);
 	to = PAGE_CACHE_SIZE;
 	if (((page->index + 1) << PAGE_CACHE_SHIFT) > inode->i_size) {
 		to = inode->i_size & ~PAGE_CACHE_MASK;
 		memset(page_address(page) + to, 0, PAGE_CACHE_SIZE - to);
 	}
 
-	err = affs_do_readpage_ofs(file, page, 0, to);
+	err = affs_do_readpage_ofs(page, to);
 	if (!err)
 		SetPageUptodate(page);
 	unlock_page(page);
@@ -617,7 +634,8 @@ static int affs_write_begin_ofs(struct file *file, struct address_space *mapping
 	pgoff_t index;
 	int err = 0;
 
-	pr_debug("AFFS: write_begin(%u, %llu, %llu)\n", (u32)inode->i_ino, (unsigned long long)pos, (unsigned long long)pos + len);
+	pr_debug("%s(%u, %llu, %llu)\n", __func__, (u32)inode->i_ino,
+		 (unsigned long long)pos, (unsigned long long)pos + len);
 	if (pos > AFFS_I(inode)->mmu_private) {
 		/* XXX: this probably leaves a too-big i_size in case of
 		 * failure. Should really be updating i_size at write_end time
@@ -637,7 +655,7 @@ static int affs_write_begin_ofs(struct file *file, struct address_space *mapping
 		return 0;
 
 	/* XXX: inefficient but safe in the face of short writes */
-	err = affs_do_readpage_ofs(file, page, 0, PAGE_CACHE_SIZE);
+	err = affs_do_readpage_ofs(page, PAGE_CACHE_SIZE);
 	if (err) {
 		unlock_page(page);
 		page_cache_release(page);
@@ -666,7 +684,9 @@ static int affs_write_end_ofs(struct file *file, struct address_space *mapping,
 	 * due to write_begin.
 	 */
 
-	pr_debug("AFFS: write_begin(%u, %llu, %llu)\n", (u32)inode->i_ino, (unsigned long long)pos, (unsigned long long)pos + len);
+	pr_debug("%s(%u, %llu, %llu)\n",
+		 __func__, (u32)inode->i_ino, (unsigned long long)pos,
+		(unsigned long long)pos + len);
 	bsize = AFFS_SB(sb)->s_data_blksize;
 	data = page_address(page);
 
@@ -777,7 +797,6 @@ out:
 const struct address_space_operations affs_aops_ofs = {
 	.readpage = affs_readpage_ofs,
 	//.writepage = affs_writepage_ofs,
-	//.sync_page = affs_sync_page_ofs,
 	.write_begin = affs_write_begin_ofs,
 	.write_end = affs_write_end_ofs
 };
@@ -789,7 +808,7 @@ affs_free_prealloc(struct inode *inode)
 {
 	struct super_block *sb = inode->i_sb;
 
-	pr_debug("AFFS: free_prealloc(ino=%lu)\n", inode->i_ino);
+	pr_debug("free_prealloc(ino=%lu)\n", inode->i_ino);
 
 	while (AFFS_I(inode)->i_pa_cnt) {
 		AFFS_I(inode)->i_pa_cnt--;
@@ -809,7 +828,7 @@ affs_truncate(struct inode *inode)
 	struct buffer_head *ext_bh;
 	int i;
 
-	pr_debug("AFFS: truncate(inode=%d, oldsize=%u, newsize=%u)\n",
+	pr_debug("truncate(inode=%d, oldsize=%u, newsize=%u)\n",
 		 (u32)inode->i_ino, (u32)AFFS_I(inode)->mmu_private, (u32)inode->i_size);
 
 	last_blk = 0;
@@ -823,7 +842,7 @@ affs_truncate(struct inode *inode)
 		struct address_space *mapping = inode->i_mapping;
 		struct page *page;
 		void *fsdata;
-		u32 size = inode->i_size;
+		loff_t size = inode->i_size;
 		int res;
 
 		res = mapping->a_ops->write_begin(NULL, mapping, size, 0, 0, &page, &fsdata);
@@ -885,9 +904,9 @@ affs_truncate(struct inode *inode)
 		if (AFFS_SB(sb)->s_flags & SF_OFS) {
 			struct buffer_head *bh = affs_bread_ino(inode, last_blk, 0);
 			u32 tmp;
-			if (IS_ERR(ext_bh)) {
+			if (IS_ERR(bh)) {
 				affs_warning(sb, "truncate", "unexpected read error for last block %u (%d)",
-					     ext, PTR_ERR(ext_bh));
+					     ext, PTR_ERR(bh));
 				return;
 			}
 			tmp = be32_to_cpu(AFFS_DATA_HEAD(bh)->next);
@@ -915,3 +934,21 @@ affs_truncate(struct inode *inode)
 	}
 	affs_free_prealloc(inode);
 }
+
+int affs_file_fsync(struct file *filp, loff_t start, loff_t end, int datasync)
+{
+	struct inode *inode = filp->f_mapping->host;
+	int ret, err;
+
+	err = filemap_write_and_wait_range(inode->i_mapping, start, end);
+	if (err)
+		return err;
+
+	mutex_lock(&inode->i_mutex);
+	ret = write_inode_now(inode, 0);
+	err = sync_blockdev(inode->i_sb->s_bdev);
+	if (!ret)
+		ret = err;
+	mutex_unlock(&inode->i_mutex);
+	return ret;
+}
diff --git a/fs/affs/inode.c b/fs/affs/inode.c
index 3c4ec7d864c..bec2d1a0c91 100644
--- a/fs/affs/inode.c
+++ b/fs/affs/inode.c
@@ -10,6 +10,7 @@
  *  (C) 1991  Linus Torvalds - minix filesystem
  */
 #include <linux/sched.h>
+#include <linux/gfp.h>
 #include "affs.h"
 
 extern const struct inode_operations affs_symlink_inode_operations;
@@ -33,7 +34,7 @@ struct inode *affs_iget(struct super_block *sb, unsigned long ino)
 	if (!(inode->i_state & I_NEW))
 		return inode;
 
-	pr_debug("AFFS: affs_iget(%lu)\n", inode->i_ino);
+	pr_debug("affs_iget(%lu)\n", inode->i_ino);
 
 	block = inode->i_ino;
 	bh = affs_bread(sb, block);
@@ -53,7 +54,7 @@ struct inode *affs_iget(struct super_block *sb, unsigned long ino)
 	prot = be32_to_cpu(tail->protect);
 
 	inode->i_size = 0;
-	inode->i_nlink = 1;
+	set_nlink(inode, 1);
 	inode->i_mode = 0;
 	AFFS_I(inode)->i_extcnt = 1;
 	AFFS_I(inode)->i_ext_last = ~1;
@@ -79,17 +80,17 @@ struct inode *affs_iget(struct super_block *sb, unsigned long ino)
 	if (id == 0 || sbi->s_flags & SF_SETUID)
 		inode->i_uid = sbi->s_uid;
 	else if (id == 0xFFFF && sbi->s_flags & SF_MUFS)
-		inode->i_uid = 0;
+		i_uid_write(inode, 0);
 	else
-		inode->i_uid = id;
+		i_uid_write(inode, id);
 
 	id = be16_to_cpu(tail->gid);
 	if (id == 0 || sbi->s_flags & SF_SETGID)
 		inode->i_gid = sbi->s_gid;
 	else if (id == 0xFFFF && sbi->s_flags & SF_MUFS)
-		inode->i_gid = 0;
+		i_gid_write(inode, 0);
 	else
-		inode->i_gid = id;
+		i_gid_write(inode, id);
 
 	switch (be32_to_cpu(tail->stype)) {
 	case ST_ROOT:
@@ -136,7 +137,7 @@ struct inode *affs_iget(struct super_block *sb, unsigned long ino)
 					       sbi->s_hashsize + 1;
 		}
 		if (tail->link_chain)
-			inode->i_nlink = 2;
+			set_nlink(inode, 2);
 		inode->i_mapping->a_ops = (sbi->s_flags & SF_OFS) ? &affs_aops_ofs : &affs_aops;
 		inode->i_op = &affs_file_inode_operations;
 		inode->i_fop = &affs_file_operations;
@@ -166,7 +167,7 @@ bad_inode:
 }
 
 int
-affs_write_inode(struct inode *inode, int unused)
+affs_write_inode(struct inode *inode, struct writeback_control *wbc)
 {
 	struct super_block	*sb = inode->i_sb;
 	struct buffer_head	*bh;
@@ -174,7 +175,7 @@ affs_write_inode(struct inode *inode, int unused)
 	uid_t			 uid;
 	gid_t			 gid;
 
-	pr_debug("AFFS: write_inode(%lu)\n",inode->i_ino);
+	pr_debug("write_inode(%lu)\n", inode->i_ino);
 
 	if (!inode->i_nlink)
 		// possibly free block
@@ -192,13 +193,13 @@ affs_write_inode(struct inode *inode, int unused)
 		tail->size = cpu_to_be32(inode->i_size);
 		secs_to_datestamp(inode->i_mtime.tv_sec,&tail->change);
 		if (!(inode->i_ino == AFFS_SB(sb)->s_root_block)) {
-			uid = inode->i_uid;
-			gid = inode->i_gid;
+			uid = i_uid_read(inode);
+			gid = i_gid_read(inode);
 			if (AFFS_SB(sb)->s_flags & SF_MUFS) {
-				if (inode->i_uid == 0 || inode->i_uid == 0xFFFF)
-					uid = inode->i_uid ^ ~0;
-				if (inode->i_gid == 0 || inode->i_gid == 0xFFFF)
-					gid = inode->i_gid ^ ~0;
+				if (uid == 0 || uid == 0xFFFF)
+					uid = uid ^ ~0;
+				if (gid == 0 || gid == 0xFFFF)
+					gid = gid ^ ~0;
 			}
 			if (!(AFFS_SB(sb)->s_flags & SF_SETUID))
 				tail->uid = cpu_to_be16(uid);
@@ -219,7 +220,7 @@ affs_notify_change(struct dentry *dentry, struct iattr *attr)
 	struct inode *inode = dentry->d_inode;
 	int error;
 
-	pr_debug("AFFS: notify_change(%lu,0x%x)\n",inode->i_ino,attr->ia_valid);
+	pr_debug("notify_change(%lu,0x%x)\n", inode->i_ino, attr->ia_valid);
 
 	error = inode_change_ok(inode,attr);
 	if (error)
@@ -234,35 +235,44 @@ affs_notify_change(struct dentry *dentry, struct iattr *attr)
 		goto out;
 	}
 
-	error = inode_setattr(inode, attr);
-	if (!error && (attr->ia_valid & ATTR_MODE))
+	if ((attr->ia_valid & ATTR_SIZE) &&
+	    attr->ia_size != i_size_read(inode)) {
+		error = inode_newsize_ok(inode, attr->ia_size);
+		if (error)
+			return error;
+
+		truncate_setsize(inode, attr->ia_size);
+		affs_truncate(inode);
+	}
+
+	setattr_copy(inode, attr);
+	mark_inode_dirty(inode);
+
+	if (attr->ia_valid & ATTR_MODE)
 		mode_to_prot(inode);
 out:
 	return error;
 }
 
 void
-affs_delete_inode(struct inode *inode)
-{
-	pr_debug("AFFS: delete_inode(ino=%lu, nlink=%u)\n", inode->i_ino, inode->i_nlink);
-	truncate_inode_pages(&inode->i_data, 0);
-	inode->i_size = 0;
-	affs_truncate(inode);
-	clear_inode(inode);
-	affs_free_block(inode->i_sb, inode->i_ino);
-}
-
-void
-affs_clear_inode(struct inode *inode)
+affs_evict_inode(struct inode *inode)
 {
 	unsigned long cache_page;
+	pr_debug("evict_inode(ino=%lu, nlink=%u)\n",
+		 inode->i_ino, inode->i_nlink);
+	truncate_inode_pages_final(&inode->i_data);
 
-	pr_debug("AFFS: clear_inode(ino=%lu, nlink=%u)\n", inode->i_ino, inode->i_nlink);
+	if (!inode->i_nlink) {
+		inode->i_size = 0;
+		affs_truncate(inode);
+	}
 
+	invalidate_inode_buffers(inode);
+	clear_inode(inode);
 	affs_free_prealloc(inode);
 	cache_page = (unsigned long)AFFS_I(inode)->i_lc;
 	if (cache_page) {
-		pr_debug("AFFS: freeing ext cache\n");
+		pr_debug("freeing ext cache\n");
 		AFFS_I(inode)->i_lc = NULL;
 		AFFS_I(inode)->i_ac = NULL;
 		free_page(cache_page);
@@ -270,6 +280,9 @@ affs_clear_inode(struct inode *inode)
 	affs_brelse(AFFS_I(inode)->i_ext_bh);
 	AFFS_I(inode)->i_ext_last = ~1;
 	AFFS_I(inode)->i_ext_bh = NULL;
+
+	if (!inode->i_nlink)
+		affs_free_block(inode->i_sb, inode->i_ino);
 }
 
 struct inode *
@@ -295,7 +308,7 @@ affs_new_inode(struct inode *dir)
 	inode->i_uid     = current_fsuid();
 	inode->i_gid     = current_fsgid();
 	inode->i_ino     = block;
-	inode->i_nlink   = 1;
+	set_nlink(inode, 1);
 	inode->i_mtime   = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
 	atomic_set(&AFFS_I(inode)->i_opencnt, 0);
 	AFFS_I(inode)->i_blkcnt = 0;
@@ -338,7 +351,8 @@ affs_add_entry(struct inode *dir, struct inode *inode, struct dentry *dentry, s3
 	u32 block = 0;
 	int retval;
 
-	pr_debug("AFFS: add_entry(dir=%u, inode=%u, \"%*s\", type=%d)\n", (u32)dir->i_ino,
+	pr_debug("%s(dir=%u, inode=%u, \"%*s\", type=%d)\n",
+		 __func__, (u32)dir->i_ino,
 	         (u32)inode->i_ino, (int)dentry->d_name.len, dentry->d_name.name, type);
 
 	retval = -EIO;
@@ -378,8 +392,8 @@ affs_add_entry(struct inode *dir, struct inode *inode, struct dentry *dentry, s3
 		AFFS_TAIL(sb, inode_bh)->link_chain = cpu_to_be32(block);
 		affs_adjust_checksum(inode_bh, block - be32_to_cpu(chain));
 		mark_buffer_dirty_inode(inode_bh, inode);
-		inode->i_nlink = 2;
-		atomic_inc(&inode->i_count);
+		set_nlink(inode, 2);
+		ihold(inode);
 	}
 	affs_fix_checksum(sb, bh);
 	mark_buffer_dirty_inode(bh, inode);
diff --git a/fs/affs/namei.c b/fs/affs/namei.c
index 960d336ec69..035bd31556f 100644
--- a/fs/affs/namei.c
+++ b/fs/affs/namei.c
@@ -13,18 +13,20 @@
 typedef int (*toupper_t)(int);
 
 static int	 affs_toupper(int ch);
-static int	 affs_hash_dentry(struct dentry *, struct qstr *);
-static int       affs_compare_dentry(struct dentry *, struct qstr *, struct qstr *);
+static int	 affs_hash_dentry(const struct dentry *, struct qstr *);
+static int       affs_compare_dentry(const struct dentry *parent, const struct dentry *dentry,
+		unsigned int len, const char *str, const struct qstr *name);
 static int	 affs_intl_toupper(int ch);
-static int	 affs_intl_hash_dentry(struct dentry *, struct qstr *);
-static int       affs_intl_compare_dentry(struct dentry *, struct qstr *, struct qstr *);
+static int	 affs_intl_hash_dentry(const struct dentry *, struct qstr *);
+static int       affs_intl_compare_dentry(const struct dentry *parent, const struct dentry *dentry,
+		unsigned int len, const char *str, const struct qstr *name);
 
 const struct dentry_operations affs_dentry_operations = {
 	.d_hash		= affs_hash_dentry,
 	.d_compare	= affs_compare_dentry,
 };
 
-static const struct dentry_operations affs_intl_dentry_operations = {
+const struct dentry_operations affs_intl_dentry_operations = {
 	.d_hash		= affs_intl_hash_dentry,
 	.d_compare	= affs_intl_compare_dentry,
 };
@@ -58,13 +60,13 @@ affs_get_toupper(struct super_block *sb)
  * Note: the dentry argument is the parent dentry.
  */
 static inline int
-__affs_hash_dentry(struct dentry *dentry, struct qstr *qstr, toupper_t toupper)
+__affs_hash_dentry(struct qstr *qstr, toupper_t toupper, bool notruncate)
 {
 	const u8 *name = qstr->name;
 	unsigned long hash;
 	int i;
 
-	i = affs_check_name(qstr->name,qstr->len);
+	i = affs_check_name(qstr->name, qstr->len, notruncate);
 	if (i)
 		return i;
 
@@ -78,39 +80,45 @@ __affs_hash_dentry(struct dentry *dentry, struct qstr *qstr, toupper_t toupper)
 }
 
 static int
-affs_hash_dentry(struct dentry *dentry, struct qstr *qstr)
+affs_hash_dentry(const struct dentry *dentry, struct qstr *qstr)
 {
-	return __affs_hash_dentry(dentry, qstr, affs_toupper);
+	return __affs_hash_dentry(qstr, affs_toupper,
+				  affs_nofilenametruncate(dentry));
+
 }
+
 static int
-affs_intl_hash_dentry(struct dentry *dentry, struct qstr *qstr)
+affs_intl_hash_dentry(const struct dentry *dentry, struct qstr *qstr)
 {
-	return __affs_hash_dentry(dentry, qstr, affs_intl_toupper);
+	return __affs_hash_dentry(qstr, affs_intl_toupper,
+				  affs_nofilenametruncate(dentry));
+
 }
 
-static inline int
-__affs_compare_dentry(struct dentry *dentry, struct qstr *a, struct qstr *b, toupper_t toupper)
+static inline int __affs_compare_dentry(unsigned int len,
+		const char *str, const struct qstr *name, toupper_t toupper,
+		bool notruncate)
 {
-	const u8 *aname = a->name;
-	const u8 *bname = b->name;
-	int len;
+	const u8 *aname = str;
+	const u8 *bname = name->name;
 
-	/* 'a' is the qstr of an already existing dentry, so the name
-	 * must be valid. 'b' must be validated first.
+	/*
+	 * 'str' is the name of an already existing dentry, so the name
+	 * must be valid. 'name' must be validated first.
 	 */
 
-	if (affs_check_name(b->name,b->len))
+	if (affs_check_name(name->name, name->len, notruncate))
 		return 1;
 
-	/* If the names are longer than the allowed 30 chars,
+	/*
+	 * If the names are longer than the allowed 30 chars,
 	 * the excess is ignored, so their length may differ.
 	 */
-	len = a->len;
 	if (len >= 30) {
-		if (b->len < 30)
+		if (name->len < 30)
 			return 1;
 		len = 30;
-	} else if (len != b->len)
+	} else if (len != name->len)
 		return 1;
 
 	for (; len > 0; len--)
@@ -121,14 +129,21 @@ __affs_compare_dentry(struct dentry *dentry, struct qstr *a, struct qstr *b, tou
 }
 
 static int
-affs_compare_dentry(struct dentry *dentry, struct qstr *a, struct qstr *b)
+affs_compare_dentry(const struct dentry *parent, const struct dentry *dentry,
+		unsigned int len, const char *str, const struct qstr *name)
 {
-	return __affs_compare_dentry(dentry, a, b, affs_toupper);
+
+	return __affs_compare_dentry(len, str, name, affs_toupper,
+				     affs_nofilenametruncate(parent));
 }
+
 static int
-affs_intl_compare_dentry(struct dentry *dentry, struct qstr *a, struct qstr *b)
+affs_intl_compare_dentry(const struct dentry *parent, const struct dentry *dentry,
+		unsigned int len, const char *str, const struct qstr *name)
 {
-	return __affs_compare_dentry(dentry, a, b, affs_intl_toupper);
+	return __affs_compare_dentry(len, str, name, affs_intl_toupper,
+				     affs_nofilenametruncate(parent));
+
 }
 
 /*
@@ -175,7 +190,8 @@ affs_find_entry(struct inode *dir, struct dentry *dentry)
 	toupper_t toupper = affs_get_toupper(sb);
 	u32 key;
 
-	pr_debug("AFFS: find_entry(\"%.*s\")\n", (int)dentry->d_name.len, dentry->d_name.name);
+	pr_debug("%s(\"%.*s\")\n",
+		 __func__, (int)dentry->d_name.len, dentry->d_name.name);
 
 	bh = affs_bread(sb, dir->i_ino);
 	if (!bh)
@@ -197,13 +213,14 @@ affs_find_entry(struct inode *dir, struct dentry *dentry)
 }
 
 struct dentry *
-affs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+affs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
 {
 	struct super_block *sb = dir->i_sb;
 	struct buffer_head *bh;
 	struct inode *inode = NULL;
 
-	pr_debug("AFFS: lookup(\"%.*s\")\n",(int)dentry->d_name.len,dentry->d_name.name);
+	pr_debug("%s(\"%.*s\")\n",
+		 __func__, (int)dentry->d_name.len, dentry->d_name.name);
 
 	affs_lock_dir(dir);
 	bh = affs_find_entry(dir, dentry);
@@ -224,9 +241,8 @@ affs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
 		affs_brelse(bh);
 		inode = affs_iget(sb, ino);
 		if (IS_ERR(inode))
-			return ERR_PTR(PTR_ERR(inode));
+			return ERR_CAST(inode);
 	}
-	dentry->d_op = AFFS_SB(sb)->s_flags & SF_INTL ? &affs_intl_dentry_operations : &affs_dentry_operations;
 	d_add(dentry, inode);
 	return NULL;
 }
@@ -234,21 +250,22 @@ affs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
 int
 affs_unlink(struct inode *dir, struct dentry *dentry)
 {
-	pr_debug("AFFS: unlink(dir=%d, %lu \"%.*s\")\n", (u32)dir->i_ino,
-		 dentry->d_inode->i_ino,
-		 (int)dentry->d_name.len, dentry->d_name.name);
+	pr_debug("%s(dir=%d, %lu \"%.*s\")\n",
+		 __func__, (u32)dir->i_ino, dentry->d_inode->i_ino,
+		(int)dentry->d_name.len, dentry->d_name.name);
 
 	return affs_remove_header(dentry);
 }
 
 int
-affs_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *nd)
+affs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool excl)
 {
 	struct super_block *sb = dir->i_sb;
 	struct inode	*inode;
 	int		 error;
 
-	pr_debug("AFFS: create(%lu,\"%.*s\",0%o)\n",dir->i_ino,(int)dentry->d_name.len,
+	pr_debug("%s(%lu,\"%.*s\",0%ho)\n",
+		 __func__, dir->i_ino, (int)dentry->d_name.len,
 		 dentry->d_name.name,mode);
 
 	inode = affs_new_inode(dir);
@@ -264,7 +281,7 @@ affs_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata
 	inode->i_mapping->a_ops = (AFFS_SB(sb)->s_flags & SF_OFS) ? &affs_aops_ofs : &affs_aops;
 	error = affs_add_entry(dir, inode, dentry, ST_FILE);
 	if (error) {
-		inode->i_nlink = 0;
+		clear_nlink(inode);
 		iput(inode);
 		return error;
 	}
@@ -272,13 +289,14 @@ affs_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata
 }
 
 int
-affs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
+affs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 {
 	struct inode		*inode;
 	int			 error;
 
-	pr_debug("AFFS: mkdir(%lu,\"%.*s\",0%o)\n",dir->i_ino,
-		 (int)dentry->d_name.len,dentry->d_name.name,mode);
+	pr_debug("%s(%lu,\"%.*s\",0%ho)\n",
+		 __func__, dir->i_ino, (int)dentry->d_name.len,
+		 dentry->d_name.name, mode);
 
 	inode = affs_new_inode(dir);
 	if (!inode)
@@ -292,7 +310,7 @@ affs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 
 	error = affs_add_entry(dir, inode, dentry, ST_USERDIR);
 	if (error) {
-		inode->i_nlink = 0;
+		clear_nlink(inode);
 		mark_inode_dirty(inode);
 		iput(inode);
 		return error;
@@ -303,8 +321,8 @@ affs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 int
 affs_rmdir(struct inode *dir, struct dentry *dentry)
 {
-	pr_debug("AFFS: rmdir(dir=%u, %lu \"%.*s\")\n", (u32)dir->i_ino,
-		 dentry->d_inode->i_ino,
+	pr_debug("%s(dir=%u, %lu \"%.*s\")\n",
+		__func__, (u32)dir->i_ino, dentry->d_inode->i_ino,
 		 (int)dentry->d_name.len, dentry->d_name.name);
 
 	return affs_remove_header(dentry);
@@ -320,8 +338,9 @@ affs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
 	int			 i, maxlen, error;
 	char			 c, lc;
 
-	pr_debug("AFFS: symlink(%lu,\"%.*s\" -> \"%s\")\n",dir->i_ino,
-		 (int)dentry->d_name.len,dentry->d_name.name,symname);
+	pr_debug("%s(%lu,\"%.*s\" -> \"%s\")\n",
+		 __func__, dir->i_ino, (int)dentry->d_name.len,
+		 dentry->d_name.name, symname);
 
 	maxlen = AFFS_SB(sb)->s_hashsize * sizeof(u32) - 1;
 	inode  = affs_new_inode(dir);
@@ -341,10 +360,13 @@ affs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
 	p  = (char *)AFFS_HEAD(bh)->table;
 	lc = '/';
 	if (*symname == '/') {
+		struct affs_sb_info *sbi = AFFS_SB(sb);
 		while (*symname == '/')
 			symname++;
-		while (AFFS_SB(sb)->s_volume[i])	/* Cannot overflow */
-			*p++ = AFFS_SB(sb)->s_volume[i++];
+		spin_lock(&sbi->symlink_lock);
+		while (sbi->s_volume[i])	/* Cannot overflow */
+			*p++ = sbi->s_volume[i++];
+		spin_unlock(&sbi->symlink_lock);
 	}
 	while (i < maxlen && (c = *symname++)) {
 		if (c == '.' && lc == '/' && *symname == '.' && symname[1] == '/') {
@@ -376,7 +398,7 @@ affs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
 	return 0;
 
 err:
-	inode->i_nlink = 0;
+	clear_nlink(inode);
 	mark_inode_dirty(inode);
 	iput(inode);
 	return error;
@@ -387,7 +409,8 @@ affs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry)
 {
 	struct inode *inode = old_dentry->d_inode;
 
-	pr_debug("AFFS: link(%u, %u, \"%.*s\")\n", (u32)inode->i_ino, (u32)dir->i_ino,
+	pr_debug("%s(%u, %u, \"%.*s\")\n",
+		 __func__, (u32)inode->i_ino, (u32)dir->i_ino,
 		 (int)dentry->d_name.len,dentry->d_name.name);
 
 	return affs_add_entry(dir, inode, dentry, ST_LINKFILE);
@@ -401,11 +424,15 @@ affs_rename(struct inode *old_dir, struct dentry *old_dentry,
 	struct buffer_head *bh = NULL;
 	int retval;
 
-	pr_debug("AFFS: rename(old=%u,\"%*s\" to new=%u,\"%*s\")\n",
-		 (u32)old_dir->i_ino, (int)old_dentry->d_name.len, old_dentry->d_name.name,
-		 (u32)new_dir->i_ino, (int)new_dentry->d_name.len, new_dentry->d_name.name);
+	pr_debug("%s(old=%u,\"%*s\" to new=%u,\"%*s\")\n",
+		 __func__, (u32)old_dir->i_ino, (int)old_dentry->d_name.len,
+		 old_dentry->d_name.name, (u32)new_dir->i_ino,
+		(int)new_dentry->d_name.len, new_dentry->d_name.name);
+
+	retval = affs_check_name(new_dentry->d_name.name,
+				 new_dentry->d_name.len,
+				 affs_nofilenametruncate(old_dentry));
 
-	retval = affs_check_name(new_dentry->d_name.name,new_dentry->d_name.len);
 	if (retval)
 		return retval;
 
diff --git a/fs/affs/super.c b/fs/affs/super.c
index 5ce695e707f..51f1a95bff7 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -16,6 +16,8 @@
 #include <linux/parser.h>
 #include <linux/magic.h>
 #include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/writeback.h>
 #include "affs.h"
 
 extern struct timezone sys_tz;
@@ -24,47 +26,68 @@ static int affs_statfs(struct dentry *dentry, struct kstatfs *buf);
 static int affs_remount (struct super_block *sb, int *flags, char *data);
 
 static void
-affs_put_super(struct super_block *sb)
+affs_commit_super(struct super_block *sb, int wait)
 {
 	struct affs_sb_info *sbi = AFFS_SB(sb);
-	pr_debug("AFFS: put_super()\n");
-
-	if (!(sb->s_flags & MS_RDONLY)) {
-		AFFS_ROOT_TAIL(sb, sbi->s_root_bh)->bm_flag = cpu_to_be32(1);
-		secs_to_datestamp(get_seconds(),
-				  &AFFS_ROOT_TAIL(sb, sbi->s_root_bh)->disk_change);
-		affs_fix_checksum(sb, sbi->s_root_bh);
-		mark_buffer_dirty(sbi->s_root_bh);
-	}
+	struct buffer_head *bh = sbi->s_root_bh;
+	struct affs_root_tail *tail = AFFS_ROOT_TAIL(sb, bh);
 
-	kfree(sbi->s_prefix);
-	affs_free_bitmap(sb);
-	affs_brelse(sbi->s_root_bh);
-	kfree(sbi);
-	sb->s_fs_info = NULL;
-	return;
+	lock_buffer(bh);
+	secs_to_datestamp(get_seconds(), &tail->disk_change);
+	affs_fix_checksum(sb, bh);
+	unlock_buffer(bh);
+
+	mark_buffer_dirty(bh);
+	if (wait)
+		sync_dirty_buffer(bh);
 }
 
 static void
-affs_write_super(struct super_block *sb)
+affs_put_super(struct super_block *sb)
+{
+	struct affs_sb_info *sbi = AFFS_SB(sb);
+	pr_debug("%s()\n", __func__);
+
+	cancel_delayed_work_sync(&sbi->sb_work);
+}
+
+static int
+affs_sync_fs(struct super_block *sb, int wait)
+{
+	affs_commit_super(sb, wait);
+	return 0;
+}
+
+static void flush_superblock(struct work_struct *work)
+{
+	struct affs_sb_info *sbi;
+	struct super_block *sb;
+
+	sbi = container_of(work, struct affs_sb_info, sb_work.work);
+	sb = sbi->sb;
+
+	spin_lock(&sbi->work_lock);
+	sbi->work_queued = 0;
+	spin_unlock(&sbi->work_lock);
+
+	affs_commit_super(sb, 1);
+}
+
+void affs_mark_sb_dirty(struct super_block *sb)
 {
-	int clean = 2;
 	struct affs_sb_info *sbi = AFFS_SB(sb);
+	unsigned long delay;
+
+	if (sb->s_flags & MS_RDONLY)
+	       return;
 
-	if (!(sb->s_flags & MS_RDONLY)) {
-		//	if (sbi->s_bitmap[i].bm_bh) {
-		//		if (buffer_dirty(sbi->s_bitmap[i].bm_bh)) {
-		//			clean = 0;
-		AFFS_ROOT_TAIL(sb, sbi->s_root_bh)->bm_flag = cpu_to_be32(clean);
-		secs_to_datestamp(get_seconds(),
-				  &AFFS_ROOT_TAIL(sb, sbi->s_root_bh)->disk_change);
-		affs_fix_checksum(sb, sbi->s_root_bh);
-		mark_buffer_dirty(sbi->s_root_bh);
-		sb->s_dirt = !clean;	/* redo until bitmap synced */
-	} else
-		sb->s_dirt = 0;
-
-	pr_debug("AFFS: write_super() at %lu, clean=%d\n", get_seconds(), clean);
+	spin_lock(&sbi->work_lock);
+	if (!sbi->work_queued) {
+	       delay = msecs_to_jiffies(dirty_writeback_interval * 10);
+	       queue_delayed_work(system_long_wq, &sbi->sb_work, delay);
+	       sbi->work_queued = 1;
+	}
+	spin_unlock(&sbi->work_lock);
 }
 
 static struct kmem_cache * affs_inode_cachep;
@@ -85,21 +108,27 @@ static struct inode *affs_alloc_inode(struct super_block *sb)
 	return &i->vfs_inode;
 }
 
-static void affs_destroy_inode(struct inode *inode)
+static void affs_i_callback(struct rcu_head *head)
 {
+	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kmem_cache_free(affs_inode_cachep, AFFS_I(inode));
 }
 
+static void affs_destroy_inode(struct inode *inode)
+{
+	call_rcu(&inode->i_rcu, affs_i_callback);
+}
+
 static void init_once(void *foo)
 {
 	struct affs_inode_info *ei = (struct affs_inode_info *) foo;
 
-	init_MUTEX(&ei->i_link_lock);
-	init_MUTEX(&ei->i_ext_lock);
+	sema_init(&ei->i_link_lock, 1);
+	sema_init(&ei->i_ext_lock, 1);
 	inode_init_once(&ei->vfs_inode);
 }
 
-static int init_inodecache(void)
+static int __init init_inodecache(void)
 {
 	affs_inode_cachep = kmem_cache_create("affs_inode_cache",
 					     sizeof(struct affs_inode_info),
@@ -113,6 +142,11 @@ static int init_inodecache(void)
 
 static void destroy_inodecache(void)
 {
+	/*
+	 * Make sure all delayed rcu free inodes are flushed before we
+	 * destroy cache.
+	 */
+	rcu_barrier();
 	kmem_cache_destroy(affs_inode_cachep);
 }
 
@@ -120,17 +154,16 @@ static const struct super_operations affs_sops = {
 	.alloc_inode	= affs_alloc_inode,
 	.destroy_inode	= affs_destroy_inode,
 	.write_inode	= affs_write_inode,
-	.delete_inode	= affs_delete_inode,
-	.clear_inode	= affs_clear_inode,
+	.evict_inode	= affs_evict_inode,
 	.put_super	= affs_put_super,
-	.write_super	= affs_write_super,
+	.sync_fs	= affs_sync_fs,
 	.statfs		= affs_statfs,
 	.remount_fs	= affs_remount,
 	.show_options	= generic_show_options,
 };
 
 enum {
-	Opt_bs, Opt_mode, Opt_mufs, Opt_prefix, Opt_protect,
+	Opt_bs, Opt_mode, Opt_mufs, Opt_notruncate, Opt_prefix, Opt_protect,
 	Opt_reserved, Opt_root, Opt_setgid, Opt_setuid,
 	Opt_verbose, Opt_volume, Opt_ignore, Opt_err,
 };
@@ -139,6 +172,7 @@ static const match_table_t tokens = {
 	{Opt_bs, "bs=%u"},
 	{Opt_mode, "mode=%o"},
 	{Opt_mufs, "mufs"},
+	{Opt_notruncate, "nofilenametruncate"},
 	{Opt_prefix, "prefix=%s"},
 	{Opt_protect, "protect"},
 	{Opt_reserved, "reserved=%u"},
@@ -155,7 +189,7 @@ static const match_table_t tokens = {
 };
 
 static int
-parse_options(char *options, uid_t *uid, gid_t *gid, int *mode, int *reserved, s32 *root,
+parse_options(char *options, kuid_t *uid, kgid_t *gid, int *mode, int *reserved, s32 *root,
 		int *blocksize, char **prefix, char *volume, unsigned long *mount_opts)
 {
 	char *p;
@@ -183,26 +217,27 @@ parse_options(char *options, uid_t *uid, gid_t *gid, int *mode, int *reserved, s
 		switch (token) {
 		case Opt_bs:
 			if (match_int(&args[0], &n))
-				return -EINVAL;
+				return 0;
 			if (n != 512 && n != 1024 && n != 2048
 			    && n != 4096) {
-				printk ("AFFS: Invalid blocksize (512, 1024, 2048, 4096 allowed)\n");
+				pr_warn("Invalid blocksize (512, 1024, 2048, 4096 allowed)\n");
 				return 0;
 			}
 			*blocksize = n;
 			break;
 		case Opt_mode:
 			if (match_octal(&args[0], &option))
-				return 1;
+				return 0;
 			*mode = option & 0777;
 			*mount_opts |= SF_SETMODE;
 			break;
 		case Opt_mufs:
 			*mount_opts |= SF_MUFS;
 			break;
+		case Opt_notruncate:
+			*mount_opts |= SF_NO_TRUNCATE;
+			break;
 		case Opt_prefix:
-			/* Free any previous prefix */
-			kfree(*prefix);
 			*prefix = match_strdup(&args[0]);
 			if (!*prefix)
 				return 0;
@@ -213,22 +248,26 @@ parse_options(char *options, uid_t *uid, gid_t *gid, int *mode, int *reserved, s
 			break;
 		case Opt_reserved:
 			if (match_int(&args[0], reserved))
-				return 1;
+				return 0;
 			break;
 		case Opt_root:
 			if (match_int(&args[0], root))
-				return 1;
+				return 0;
 			break;
 		case Opt_setgid:
 			if (match_int(&args[0], &option))
-				return 1;
-			*gid = option;
+				return 0;
+			*gid = make_kgid(current_user_ns(), option);
+			if (!gid_valid(*gid))
+				return 0;
 			*mount_opts |= SF_SETGID;
 			break;
 		case Opt_setuid:
 			if (match_int(&args[0], &option))
-				return -EINVAL;
-			*uid = option;
+				return 0;
+			*uid = make_kuid(current_user_ns(), option);
+			if (!uid_valid(*uid))
+				return 0;
 			*mount_opts |= SF_SETUID;
 			break;
 		case Opt_verbose:
@@ -246,8 +285,8 @@ parse_options(char *options, uid_t *uid, gid_t *gid, int *mode, int *reserved, s
 		 	/* Silently ignore the quota options */
 			break;
 		default:
-			printk("AFFS: Unrecognized mount option \"%s\" "
-					"or missing value\n", p);
+			pr_warn("Unrecognized mount option \"%s\" or missing value\n",
+				p);
 			return 0;
 		}
 	}
@@ -270,17 +309,17 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
 	int			 num_bm;
 	int			 i, j;
 	s32			 key;
-	uid_t			 uid;
-	gid_t			 gid;
+	kuid_t			 uid;
+	kgid_t			 gid;
 	int			 reserved;
 	unsigned long		 mount_flags;
 	int			 tmp_flags;	/* fix remount prototype... */
 	u8			 sig[4];
-	int			 ret = -EINVAL;
+	int			 ret;
 
 	save_mount_options(sb, data);
 
-	pr_debug("AFFS: read_super(%s)\n",data ? (const char *)data : "no options");
+	pr_debug("read_super(%s)\n", data ? (const char *)data : "no options");
 
 	sb->s_magic             = AFFS_SUPER_MAGIC;
 	sb->s_op                = &affs_sops;
@@ -289,13 +328,18 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
 	sbi = kzalloc(sizeof(struct affs_sb_info), GFP_KERNEL);
 	if (!sbi)
 		return -ENOMEM;
+
 	sb->s_fs_info = sbi;
+	sbi->sb = sb;
 	mutex_init(&sbi->s_bmlock);
+	spin_lock_init(&sbi->symlink_lock);
+	spin_lock_init(&sbi->work_lock);
+	INIT_DELAYED_WORK(&sbi->sb_work, flush_superblock);
 
 	if (!parse_options(data,&uid,&gid,&i,&reserved,&root_block,
 				&blocksize,&sbi->s_prefix,
 				sbi->s_volume, &mount_flags)) {
-		printk(KERN_ERR "AFFS: Error parsing options\n");
+		pr_err("Error parsing options\n");
 		return -EINVAL;
 	}
 	/* N.B. after this point s_prefix must be released */
@@ -312,7 +356,7 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
 	 */
 
 	size = sb->s_bdev->bd_inode->i_size >> 9;
-	pr_debug("AFFS: initial blocksize=%d, #blocks=%d\n", 512, size);
+	pr_debug("initial blocksize=%d, #blocks=%d\n", 512, size);
 
 	affs_set_blocksize(sb, PAGE_SIZE);
 	/* Try to find root block. Its location depends on the block size. */
@@ -327,7 +371,7 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
 		sbi->s_root_block = root_block;
 		if (root_block < 0)
 			sbi->s_root_block = (reserved + size - 1) / 2;
-		pr_debug("AFFS: setting blocksize to %d\n", blocksize);
+		pr_debug("setting blocksize to %d\n", blocksize);
 		affs_set_blocksize(sb, blocksize);
 		sbi->s_partition_size = size;
 
@@ -342,7 +386,7 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
 		 * block behind the calculated one. So we check this one, too.
 		 */
 		for (num_bm = 0; num_bm < 2; num_bm++) {
-			pr_debug("AFFS: Dev %s, trying root=%u, bs=%d, "
+			pr_debug("Dev %s, trying root=%u, bs=%d, "
 				"size=%d, reserved=%d\n",
 				sb->s_id,
 				sbi->s_root_block + num_bm,
@@ -363,19 +407,20 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
 		}
 	}
 	if (!silent)
-		printk(KERN_ERR "AFFS: No valid root block on device %s\n",
-			sb->s_id);
-	goto out_error;
+		pr_err("No valid root block on device %s\n", sb->s_id);
+	return -EINVAL;
 
 	/* N.B. after this point bh must be released */
 got_root:
+	/* Keep super block in cache */
+	sbi->s_root_bh = root_bh;
 	root_block = sbi->s_root_block;
 
 	/* Find out which kind of FS we have */
 	boot_bh = sb_bread(sb, 0);
 	if (!boot_bh) {
-		printk(KERN_ERR "AFFS: Cannot read boot block\n");
-		goto out_error;
+		pr_err("Cannot read boot block\n");
+		return -EINVAL;
 	}
 	memcpy(sig, boot_bh->b_data, 4);
 	brelse(boot_bh);
@@ -387,8 +432,7 @@ got_root:
 	 */
 	if ((chksum == FS_DCFFS || chksum == MUFS_DCFFS || chksum == FS_DCOFS
 	     || chksum == MUFS_DCOFS) && !(sb->s_flags & MS_RDONLY)) {
-		printk(KERN_NOTICE "AFFS: Dircache FS - mounting %s read only\n",
-			sb->s_id);
+		pr_notice("Dircache FS - mounting %s read only\n", sb->s_id);
 		sb->s_flags |= MS_RDONLY;
 	}
 	switch (chksum) {
@@ -422,14 +466,14 @@ got_root:
 			sb->s_flags |= MS_NOEXEC;
 			break;
 		default:
-			printk(KERN_ERR "AFFS: Unknown filesystem on device %s: %08X\n",
-				sb->s_id, chksum);
-			goto out_error;
+			pr_err("Unknown filesystem on device %s: %08X\n",
+			       sb->s_id, chksum);
+			return -EINVAL;
 	}
 
 	if (mount_flags & SF_VERBOSE) {
 		u8 len = AFFS_ROOT_TAIL(sb, root_bh)->disk_name[0];
-		printk(KERN_NOTICE "AFFS: Mounting volume \"%.*s\": Type=%.3s\\%c, Blocksize=%d\n",
+		pr_notice("Mounting volume \"%.*s\": Type=%.3s\\%c, Blocksize=%d\n",
 			len > 31 ? 31 : len,
 			AFFS_ROOT_TAIL(sb, root_bh)->disk_name + 1,
 			sig, sig[3] + '0', blocksize);
@@ -441,46 +485,31 @@ got_root:
 	if (sbi->s_flags & SF_OFS)
 		sbi->s_data_blksize -= 24;
 
-	/* Keep super block in cache */
-	sbi->s_root_bh = root_bh;
-	/* N.B. after this point s_root_bh must be released */
-
 	tmp_flags = sb->s_flags;
-	if (affs_init_bitmap(sb, &tmp_flags))
-		goto out_error;
+	ret = affs_init_bitmap(sb, &tmp_flags);
+	if (ret)
+		return ret;
 	sb->s_flags = tmp_flags;
 
 	/* set up enough so that it can read an inode */
 
 	root_inode = affs_iget(sb, root_block);
-	if (IS_ERR(root_inode)) {
-		ret = PTR_ERR(root_inode);
-		goto out_error_noinode;
-	}
+	if (IS_ERR(root_inode))
+		return PTR_ERR(root_inode);
+
+	if (AFFS_SB(sb)->s_flags & SF_INTL)
+		sb->s_d_op = &affs_intl_dentry_operations;
+	else
+		sb->s_d_op = &affs_dentry_operations;
 
-	sb->s_root = d_alloc_root(root_inode);
+	sb->s_root = d_make_root(root_inode);
 	if (!sb->s_root) {
-		printk(KERN_ERR "AFFS: Get root inode failed\n");
-		goto out_error;
+		pr_err("AFFS: Get root inode failed\n");
+		return -ENOMEM;
 	}
-	sb->s_root->d_op = &affs_dentry_operations;
 
-	pr_debug("AFFS: s_flags=%lX\n",sb->s_flags);
+	pr_debug("s_flags=%lX\n", sb->s_flags);
 	return 0;
-
-	/*
-	 * Begin the cascaded cleanup ...
-	 */
-out_error:
-	if (root_inode)
-		iput(root_inode);
-out_error_noinode:
-	kfree(sbi->s_bitmap);
-	affs_brelse(root_bh);
-	kfree(sbi->s_prefix);
-	kfree(sbi);
-	sb->s_fs_info = NULL;
-	return ret;
 }
 
 static int
@@ -488,41 +517,53 @@ affs_remount(struct super_block *sb, int *flags, char *data)
 {
 	struct affs_sb_info	*sbi = AFFS_SB(sb);
 	int			 blocksize;
-	uid_t			 uid;
-	gid_t			 gid;
+	kuid_t			 uid;
+	kgid_t			 gid;
 	int			 mode;
 	int			 reserved;
 	int			 root_block;
 	unsigned long		 mount_flags;
 	int			 res = 0;
 	char			*new_opts = kstrdup(data, GFP_KERNEL);
+	char			 volume[32];
+	char			*prefix = NULL;
 
-	pr_debug("AFFS: remount(flags=0x%x,opts=\"%s\")\n",*flags,data);
+	pr_debug("%s(flags=0x%x,opts=\"%s\")\n", __func__, *flags, data);
 
+	sync_filesystem(sb);
 	*flags |= MS_NODIRATIME;
 
+	memcpy(volume, sbi->s_volume, 32);
 	if (!parse_options(data, &uid, &gid, &mode, &reserved, &root_block,
-			   &blocksize, &sbi->s_prefix, sbi->s_volume,
+			   &blocksize, &prefix, volume,
 			   &mount_flags)) {
+		kfree(prefix);
 		kfree(new_opts);
 		return -EINVAL;
 	}
-	kfree(sb->s_options);
-	sb->s_options = new_opts;
+
+	flush_delayed_work(&sbi->sb_work);
+	replace_mount_options(sb, new_opts);
 
 	sbi->s_flags = mount_flags;
 	sbi->s_mode  = mode;
 	sbi->s_uid   = uid;
 	sbi->s_gid   = gid;
+	/* protect against readers */
+	spin_lock(&sbi->symlink_lock);
+	if (prefix) {
+		kfree(sbi->s_prefix);
+		sbi->s_prefix = prefix;
+	}
+	memcpy(sbi->s_volume, volume, 32);
+	spin_unlock(&sbi->symlink_lock);
 
 	if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
 		return 0;
-	if (*flags & MS_RDONLY) {
-		sb->s_dirt = 1;
-		while (sb->s_dirt)
-			affs_write_super(sb);
+
+	if (*flags & MS_RDONLY)
 		affs_free_bitmap(sb);
-	} else
+	else
 		res = affs_init_bitmap(sb, flags);
 
 	return res;
@@ -535,8 +576,9 @@ affs_statfs(struct dentry *dentry, struct kstatfs *buf)
 	int		 free;
 	u64		 id = huge_encode_dev(sb->s_bdev->bd_dev);
 
-	pr_debug("AFFS: statfs() partsize=%d, reserved=%d\n",AFFS_SB(sb)->s_partition_size,
-	     AFFS_SB(sb)->s_reserved);
+	pr_debug("%s() partsize=%d, reserved=%d\n",
+		 __func__, AFFS_SB(sb)->s_partition_size,
+		 AFFS_SB(sb)->s_reserved);
 
 	free          = affs_count_free_blocks(sb);
 	buf->f_type    = AFFS_SUPER_MAGIC;
@@ -550,20 +592,32 @@ affs_statfs(struct dentry *dentry, struct kstatfs *buf)
 	return 0;
 }
 
-static int affs_get_sb(struct file_system_type *fs_type,
-	int flags, const char *dev_name, void *data, struct vfsmount *mnt)
+static struct dentry *affs_mount(struct file_system_type *fs_type,
+	int flags, const char *dev_name, void *data)
+{
+	return mount_bdev(fs_type, flags, dev_name, data, affs_fill_super);
+}
+
+static void affs_kill_sb(struct super_block *sb)
 {
-	return get_sb_bdev(fs_type, flags, dev_name, data, affs_fill_super,
-			   mnt);
+	struct affs_sb_info *sbi = AFFS_SB(sb);
+	kill_block_super(sb);
+	if (sbi) {
+		affs_free_bitmap(sb);
+		affs_brelse(sbi->s_root_bh);
+		kfree(sbi->s_prefix);
+		kfree(sbi);
+	}
 }
 
 static struct file_system_type affs_fs_type = {
 	.owner		= THIS_MODULE,
 	.name		= "affs",
-	.get_sb		= affs_get_sb,
-	.kill_sb	= kill_block_super,
+	.mount		= affs_mount,
+	.kill_sb	= affs_kill_sb,
 	.fs_flags	= FS_REQUIRES_DEV,
 };
+MODULE_ALIAS_FS("affs");
 
 static int __init init_affs_fs(void)
 {
diff --git a/fs/affs/symlink.c b/fs/affs/symlink.c
index 41782539c90..f39b71c3981 100644
--- a/fs/affs/symlink.c
+++ b/fs/affs/symlink.c
@@ -20,9 +20,8 @@ static int affs_symlink_readpage(struct file *file, struct page *page)
 	int			 i, j;
 	char			 c;
 	char			 lc;
-	char			*pf;
 
-	pr_debug("AFFS: follow_link(ino=%lu)\n",inode->i_ino);
+	pr_debug("follow_link(ino=%lu)\n", inode->i_ino);
 
 	err = -EIO;
 	bh = affs_bread(inode->i_sb, inode->i_ino);
@@ -32,11 +31,15 @@ static int affs_symlink_readpage(struct file *file, struct page *page)
 	j  = 0;
 	lf = (struct slink_front *)bh->b_data;
 	lc = 0;
-	pf = AFFS_SB(inode->i_sb)->s_prefix ? AFFS_SB(inode->i_sb)->s_prefix : "/";
 
 	if (strchr(lf->symname,':')) {	/* Handle assign or volume name */
+		struct affs_sb_info *sbi = AFFS_SB(inode->i_sb);
+		char *pf;
+		spin_lock(&sbi->symlink_lock);
+		pf = sbi->s_prefix ? sbi->s_prefix : "/";
 		while (i < 1023 && (c = pf[i]))
 			link[i++] = c;
+		spin_unlock(&sbi->symlink_lock);
 		while (i < 1023 && lf->symname[j] != ':')
 			link[i++] = lf->symname[j++];
 		if (i < 1023)
diff --git a/fs/afs/Kconfig b/fs/afs/Kconfig