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-rw-r--r--fs/9p/Kconfig24
-rw-r--r--fs/9p/Makefile5
-rw-r--r--fs/9p/acl.c129
-rw-r--r--fs/9p/acl.h26
-rw-r--r--fs/9p/cache.c251
-rw-r--r--fs/9p/cache.h65
-rw-r--r--fs/9p/fid.c179
-rw-r--r--fs/9p/fid.h27
-rw-r--r--fs/9p/v9fs.c306
-rw-r--r--fs/9p/v9fs.h106
-rw-r--r--fs/9p/v9fs_vfs.h34
-rw-r--r--fs/9p/vfs_addr.c219
-rw-r--r--fs/9p/vfs_dentry.c88
-rw-r--r--fs/9p/vfs_dir.c179
-rw-r--r--fs/9p/vfs_file.c567
-rw-r--r--fs/9p/vfs_inode.c1684
-rw-r--r--fs/9p/vfs_inode_dotl.c1016
-rw-r--r--fs/9p/vfs_super.c109
-rw-r--r--fs/9p/xattr.c55
-rw-r--r--fs/9p/xattr.h4
-rw-r--r--fs/9p/xattr_security.c80
-rw-r--r--fs/9p/xattr_trusted.c80
22 files changed, 3294 insertions, 1939 deletions
diff --git a/fs/9p/Kconfig b/fs/9p/Kconfig
index 7e051147679..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.
@@ -9,9 +9,9 @@ config 9P_FS
If unsure, say N.
+if 9P_FS
config 9P_FSCACHE
- bool "Enable 9P client caching support (EXPERIMENTAL)"
- depends on EXPERIMENTAL
+ 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
@@ -20,7 +20,6 @@ config 9P_FSCACHE
config 9P_FS_POSIX_ACL
bool "9P POSIX Access Control Lists"
- depends on 9P_FS
select FS_POSIX_ACL
help
POSIX Access Control Lists (ACLs) support permissions for users and
@@ -30,3 +29,18 @@ config 9P_FS_POSIX_ACL
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 f8ba37effd1..ff7be98f84f 100644
--- a/fs/9p/Makefile
+++ b/fs/9p/Makefile
@@ -3,6 +3,7 @@ obj-$(CONFIG_9P_FS) := 9p.o
9p-objs := \
vfs_super.o \
vfs_inode.o \
+ vfs_inode_dotl.o \
vfs_addr.o \
vfs_file.o \
vfs_dir.o \
@@ -10,7 +11,9 @@ obj-$(CONFIG_9P_FS) := 9p.o
v9fs.o \
fid.o \
xattr.o \
- xattr_user.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
index 12d602351db..8482f2d1160 100644
--- a/fs/9p/acl.c
+++ b/fs/9p/acl.c
@@ -21,14 +21,15 @@
#include <linux/posix_acl_xattr.h>
#include "xattr.h"
#include "acl.h"
-#include "v9fs_vfs.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;;
+ struct posix_acl *acl = NULL;
size = v9fs_fid_xattr_get(fid, name, NULL, 0);
if (size > 0) {
@@ -37,7 +38,7 @@ static struct posix_acl *__v9fs_get_acl(struct p9_fid *fid, char *name)
return ERR_PTR(-ENOMEM);
size = v9fs_fid_xattr_get(fid, name, value, size);
if (size > 0) {
- acl = posix_acl_from_xattr(value, size);
+ acl = posix_acl_from_xattr(&init_user_ns, value, size);
if (IS_ERR(acl))
goto err_out;
}
@@ -59,7 +60,8 @@ int v9fs_get_acl(struct inode *inode, struct p9_fid *fid)
struct v9fs_session_info *v9ses;
v9ses = v9fs_inode2v9ses(inode);
- if ((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) {
+ 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;
@@ -71,11 +73,15 @@ int v9fs_get_acl(struct inode *inode, struct p9_fid *fid)
if (!IS_ERR(dacl) && !IS_ERR(pacl)) {
set_cached_acl(inode, ACL_TYPE_DEFAULT, dacl);
set_cached_acl(inode, ACL_TYPE_ACCESS, pacl);
- posix_acl_release(dacl);
- posix_acl_release(pacl);
} else
retval = -EIO;
+ if (!IS_ERR(dacl))
+ posix_acl_release(dacl);
+
+ if (!IS_ERR(pacl))
+ posix_acl_release(pacl);
+
return retval;
}
@@ -91,46 +97,38 @@ static struct posix_acl *v9fs_get_cached_acl(struct inode *inode, int type)
return acl;
}
-int v9fs_check_acl(struct inode *inode, int mask)
+struct posix_acl *v9fs_iop_get_acl(struct inode *inode, int type)
{
- struct posix_acl *acl;
struct v9fs_session_info *v9ses;
v9ses = v9fs_inode2v9ses(inode);
- if ((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) {
+ if (((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) ||
+ ((v9ses->flags & V9FS_ACL_MASK) != V9FS_POSIX_ACL)) {
/*
- * On access = client mode get the acl
+ * On access = client and acl = on mode get the acl
* values from the server
*/
- return 0;
+ return NULL;
}
- acl = v9fs_get_cached_acl(inode, ACL_TYPE_ACCESS);
+ return v9fs_get_cached_acl(inode, type);
- if (IS_ERR(acl))
- return PTR_ERR(acl);
- if (acl) {
- int error = posix_acl_permission(inode, acl, mask);
- posix_acl_release(acl);
- return error;
- }
- return -EAGAIN;
}
-static int v9fs_set_acl(struct dentry *dentry, int type, struct posix_acl *acl)
+static int v9fs_set_acl(struct p9_fid *fid, int type, struct posix_acl *acl)
{
int retval;
char *name;
size_t size;
void *buffer;
- struct inode *inode = dentry->d_inode;
+ if (!acl)
+ return 0;
- set_cached_acl(inode, type, acl);
/* 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(acl, buffer, size);
+ retval = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
if (retval < 0)
goto err_free_out;
switch (type) {
@@ -143,51 +141,53 @@ static int v9fs_set_acl(struct dentry *dentry, int type, struct posix_acl *acl)
default:
BUG();
}
- retval = v9fs_xattr_set(dentry, name, buffer, size, 0);
+ retval = v9fs_fid_xattr_set(fid, name, buffer, size, 0);
err_free_out:
kfree(buffer);
return retval;
}
-int v9fs_acl_chmod(struct dentry *dentry)
+int v9fs_acl_chmod(struct inode *inode, struct p9_fid *fid)
{
int retval = 0;
- struct posix_acl *acl, *clone;
- struct inode *inode = dentry->d_inode;
+ struct posix_acl *acl;
if (S_ISLNK(inode->i_mode))
return -EOPNOTSUPP;
acl = v9fs_get_cached_acl(inode, ACL_TYPE_ACCESS);
if (acl) {
- clone = posix_acl_clone(acl, GFP_KERNEL);
+ 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);
- if (!clone)
- return -ENOMEM;
- retval = posix_acl_chmod_masq(clone, inode->i_mode);
- if (!retval)
- retval = v9fs_set_acl(dentry, ACL_TYPE_ACCESS, clone);
- posix_acl_release(clone);
}
return retval;
}
-int v9fs_set_create_acl(struct dentry *dentry,
- struct posix_acl *dpacl, struct posix_acl *pacl)
+int v9fs_set_create_acl(struct inode *inode, struct p9_fid *fid,
+ struct posix_acl *dacl, struct posix_acl *acl)
{
- if (dpacl)
- v9fs_set_acl(dentry, ACL_TYPE_DEFAULT, dpacl);
- if (pacl)
- v9fs_set_acl(dentry, ACL_TYPE_ACCESS, pacl);
- posix_acl_release(dpacl);
- posix_acl_release(pacl);
+ 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;
}
-int v9fs_acl_mode(struct inode *dir, mode_t *modep,
+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;
- mode_t mode = *modep;
+ umode_t mode = *modep;
struct posix_acl *acl = NULL;
if (!S_ISLNK(mode)) {
@@ -198,29 +198,18 @@ int v9fs_acl_mode(struct inode *dir, mode_t *modep,
mode &= ~current_umask();
}
if (acl) {
- struct posix_acl *clone;
-
if (S_ISDIR(mode))
- *dpacl = acl;
- clone = posix_acl_clone(acl, GFP_NOFS);
- retval = -ENOMEM;
- if (!clone)
- goto cleanup;
-
- retval = posix_acl_create_masq(clone, &mode);
- if (retval < 0) {
- posix_acl_release(clone);
- goto cleanup;
- }
+ *dpacl = posix_acl_dup(acl);
+ retval = __posix_acl_create(&acl, GFP_NOFS, &mode);
+ if (retval < 0)
+ return retval;
if (retval > 0)
- *pacl = clone;
+ *pacl = acl;
+ else
+ posix_acl_release(acl);
}
*modep = mode;
return 0;
-cleanup:
- posix_acl_release(acl);
- return retval;
-
}
static int v9fs_remote_get_acl(struct dentry *dentry, const char *name,
@@ -251,7 +240,7 @@ static int v9fs_xattr_get_acl(struct dentry *dentry, const char *name,
if (strcmp(name, "") != 0)
return -EINVAL;
- v9ses = v9fs_inode2v9ses(dentry->d_inode);
+ v9ses = v9fs_dentry2v9ses(dentry);
/*
* We allow set/get/list of acl when access=client is not specified
*/
@@ -263,7 +252,7 @@ static int v9fs_xattr_get_acl(struct dentry *dentry, const char *name,
return PTR_ERR(acl);
if (acl == NULL)
return -ENODATA;
- error = posix_acl_to_xattr(acl, buffer, size);
+ error = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
posix_acl_release(acl);
return error;
@@ -301,7 +290,7 @@ static int v9fs_xattr_set_acl(struct dentry *dentry, const char *name,
if (strcmp(name, "") != 0)
return -EINVAL;
- v9ses = v9fs_inode2v9ses(dentry->d_inode);
+ 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
@@ -312,11 +301,11 @@ static int v9fs_xattr_set_acl(struct dentry *dentry, const char *name,
if (S_ISLNK(inode->i_mode))
return -EOPNOTSUPP;
- if (!is_owner_or_cap(inode))
+ if (!inode_owner_or_capable(inode))
return -EPERM;
if (value) {
/* update the cached acl value */
- acl = posix_acl_from_xattr(value, size);
+ acl = posix_acl_from_xattr(&init_user_ns, value, size);
if (IS_ERR(acl))
return PTR_ERR(acl);
else if (acl) {
@@ -331,7 +320,7 @@ static int v9fs_xattr_set_acl(struct dentry *dentry, const char *name,
case ACL_TYPE_ACCESS:
name = POSIX_ACL_XATTR_ACCESS;
if (acl) {
- mode_t mode = inode->i_mode;
+ umode_t mode = inode->i_mode;
retval = posix_acl_equiv_mode(acl, &mode);
if (retval < 0)
goto err_out;
@@ -362,7 +351,7 @@ static int v9fs_xattr_set_acl(struct dentry *dentry, const char *name,
case ACL_TYPE_DEFAULT:
name = POSIX_ACL_XATTR_DEFAULT;
if (!S_ISDIR(inode->i_mode)) {
- retval = -EINVAL;
+ retval = acl ? -EINVAL : 0;
goto err_out;
}
break;
diff --git a/fs/9p/acl.h b/fs/9p/acl.h
index 59e18c2e8c7..e4f7e882272 100644
--- a/fs/9p/acl.h
+++ b/fs/9p/acl.h
@@ -16,29 +16,35 @@
#ifdef CONFIG_9P_FS_POSIX_ACL
extern int v9fs_get_acl(struct inode *, struct p9_fid *);
-extern int v9fs_check_acl(struct inode *inode, int mask);
-extern int v9fs_acl_chmod(struct dentry *);
-extern int v9fs_set_create_acl(struct dentry *,
+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, mode_t *modep,
+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_check_acl NULL
+#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 dentry *dentry)
+static inline int v9fs_acl_chmod(struct inode *inode, struct p9_fid *fid)
{
return 0;
}
-static inline int v9fs_set_create_acl(struct dentry *dentry,
- struct posix_acl *dpacl,
- struct posix_acl *pacl)
+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 int v9fs_acl_mode(struct inode *dir, mode_t *modep,
+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)
{
diff --git a/fs/9p/cache.c b/fs/9p/cache.c
index 0dbe0d139ac..a69260f2755 100644
--- a/fs/9p/cache.c
+++ b/fs/9p/cache.c
@@ -33,67 +33,11 @@
#define CACHETAG_LEN 11
-struct kmem_cache *vcookie_cache;
-
struct fscache_netfs v9fs_cache_netfs = {
.name = "9p",
.version = 0,
};
-static void init_once(void *foo)
-{
- struct v9fs_cookie *vcookie = (struct v9fs_cookie *) foo;
- vcookie->fscache = NULL;
- vcookie->qid = NULL;
- inode_init_once(&vcookie->inode);
-}
-
-/**
- * v9fs_init_vcookiecache - initialize a cache for vcookies to maintain
- * vcookie to inode mapping
- *
- * Returns 0 on success.
- */
-
-static int v9fs_init_vcookiecache(void)
-{
- vcookie_cache = kmem_cache_create("vcookie_cache",
- sizeof(struct v9fs_cookie),
- 0, (SLAB_RECLAIM_ACCOUNT|
- SLAB_MEM_SPREAD),
- init_once);
- if (!vcookie_cache)
- return -ENOMEM;
-
- return 0;
-}
-
-/**
- * v9fs_destroy_vcookiecache - destroy the cache of vcookies
- *
- */
-
-static void v9fs_destroy_vcookiecache(void)
-{
- kmem_cache_destroy(vcookie_cache);
-}
-
-int __v9fs_cache_register(void)
-{
- int ret;
- ret = v9fs_init_vcookiecache();
- if (ret < 0)
- return ret;
-
- return fscache_register_netfs(&v9fs_cache_netfs);
-}
-
-void __v9fs_cache_unregister(void)
-{
- v9fs_destroy_vcookiecache();
- fscache_unregister_netfs(&v9fs_cache_netfs);
-}
-
/**
* v9fs_random_cachetag - Generate a random tag to be associated
* with a new cache session.
@@ -118,8 +62,8 @@ static uint16_t v9fs_cache_session_get_key(const void *cookie_netfs_data,
uint16_t klen = 0;
v9ses = (struct v9fs_session_info *)cookie_netfs_data;
- P9_DPRINTK(P9_DEBUG_FSC, "session %p buf %p size %u", v9ses,
- buffer, bufmax);
+ p9_debug(P9_DEBUG_FSC, "session %p buf %p size %u\n",
+ v9ses, buffer, bufmax);
if (v9ses->cachetag)
klen = strlen(v9ses->cachetag);
@@ -128,14 +72,14 @@ static uint16_t v9fs_cache_session_get_key(const void *cookie_netfs_data,
return 0;
memcpy(buffer, v9ses->cachetag, klen);
- P9_DPRINTK(P9_DEBUG_FSC, "cache session tag %s", v9ses->cachetag);
+ 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,
+ .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)
@@ -146,15 +90,15 @@ void v9fs_cache_session_get_cookie(struct v9fs_session_info *v9ses)
v9ses->fscache = fscache_acquire_cookie(v9fs_cache_netfs.primary_index,
&v9fs_cache_session_index_def,
- v9ses);
- P9_DPRINTK(P9_DEBUG_FSC, "session %p get cookie %p", v9ses,
- v9ses->fscache);
+ 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_DPRINTK(P9_DEBUG_FSC, "session %p put cookie %p", v9ses,
- v9ses->fscache);
+ p9_debug(P9_DEBUG_FSC, "session %p put cookie %p\n",
+ v9ses, v9ses->fscache);
fscache_relinquish_cookie(v9ses->fscache, 0);
v9ses->fscache = NULL;
}
@@ -163,33 +107,31 @@ void v9fs_cache_session_put_cookie(struct v9fs_session_info *v9ses)
static uint16_t v9fs_cache_inode_get_key(const void *cookie_netfs_data,
void *buffer, uint16_t bufmax)
{
- const struct v9fs_cookie *vcookie = cookie_netfs_data;
- memcpy(buffer, &vcookie->qid->path, sizeof(vcookie->qid->path));
-
- P9_DPRINTK(P9_DEBUG_FSC, "inode %p get key %llu", &vcookie->inode,
- vcookie->qid->path);
- return sizeof(vcookie->qid->path);
+ 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_cookie *vcookie = cookie_netfs_data;
- *size = i_size_read(&vcookie->inode);
+ const struct v9fs_inode *v9inode = cookie_netfs_data;
+ *size = i_size_read(&v9inode->vfs_inode);
- P9_DPRINTK(P9_DEBUG_FSC, "inode %p get attr %llu", &vcookie->inode,
- *size);
+ 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_cookie *vcookie = cookie_netfs_data;
- memcpy(buffer, &vcookie->qid->version, sizeof(vcookie->qid->version));
-
- P9_DPRINTK(P9_DEBUG_FSC, "inode %p get aux %u", &vcookie->inode,
- vcookie->qid->version);
- return sizeof(vcookie->qid->version);
+ 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
@@ -197,13 +139,13 @@ fscache_checkaux v9fs_cache_inode_check_aux(void *cookie_netfs_data,
const void *buffer,
uint16_t buflen)
{
- const struct v9fs_cookie *vcookie = cookie_netfs_data;
+ const struct v9fs_inode *v9inode = cookie_netfs_data;
- if (buflen != sizeof(vcookie->qid->version))
+ if (buflen != sizeof(v9inode->qid.version))
return FSCACHE_CHECKAUX_OBSOLETE;
- if (memcmp(buffer, &vcookie->qid->version,
- sizeof(vcookie->qid->version)))
+ if (memcmp(buffer, &v9inode->qid.version,
+ sizeof(v9inode->qid.version)))
return FSCACHE_CHECKAUX_OBSOLETE;
return FSCACHE_CHECKAUX_OKAY;
@@ -211,7 +153,7 @@ fscache_checkaux v9fs_cache_inode_check_aux(void *cookie_netfs_data,
static void v9fs_cache_inode_now_uncached(void *cookie_netfs_data)
{
- struct v9fs_cookie *vcookie = cookie_netfs_data;
+ struct v9fs_inode *v9inode = cookie_netfs_data;
struct pagevec pvec;
pgoff_t first;
int loop, nr_pages;
@@ -220,7 +162,7 @@ static void v9fs_cache_inode_now_uncached(void *cookie_netfs_data)
first = 0;
for (;;) {
- nr_pages = pagevec_lookup(&pvec, vcookie->inode.i_mapping,
+ nr_pages = pagevec_lookup(&pvec, v9inode->vfs_inode.i_mapping,
first,
PAGEVEC_SIZE - pagevec_count(&pvec));
if (!nr_pages)
@@ -249,115 +191,113 @@ const struct fscache_cookie_def v9fs_cache_inode_index_def = {
void v9fs_cache_inode_get_cookie(struct inode *inode)
{
- struct v9fs_cookie *vcookie;
+ struct v9fs_inode *v9inode;
struct v9fs_session_info *v9ses;
if (!S_ISREG(inode->i_mode))
return;
- vcookie = v9fs_inode2cookie(inode);
- if (vcookie->fscache)
+ v9inode = V9FS_I(inode);
+ if (v9inode->fscache)
return;
v9ses = v9fs_inode2v9ses(inode);
- vcookie->fscache = fscache_acquire_cookie(v9ses->fscache,
+ v9inode->fscache = fscache_acquire_cookie(v9ses->fscache,
&v9fs_cache_inode_index_def,
- vcookie);
+ v9inode, true);
- P9_DPRINTK(P9_DEBUG_FSC, "inode %p get cookie %p", inode,
- vcookie->fscache);
+ 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_cookie *vcookie = v9fs_inode2cookie(inode);
+ struct v9fs_inode *v9inode = V9FS_I(inode);
- if (!vcookie->fscache)
+ if (!v9inode->fscache)
return;
- P9_DPRINTK(P9_DEBUG_FSC, "inode %p put cookie %p", inode,
- vcookie->fscache);
+ p9_debug(P9_DEBUG_FSC, "inode %p put cookie %p\n",
+ inode, v9inode->fscache);
- fscache_relinquish_cookie(vcookie->fscache, 0);
- vcookie->fscache = NULL;
+ fscache_relinquish_cookie(v9inode->fscache, 0);
+ v9inode->fscache = NULL;
}
void v9fs_cache_inode_flush_cookie(struct inode *inode)
{
- struct v9fs_cookie *vcookie = v9fs_inode2cookie(inode);
+ struct v9fs_inode *v9inode = V9FS_I(inode);
- if (!vcookie->fscache)
+ if (!v9inode->fscache)
return;
- P9_DPRINTK(P9_DEBUG_FSC, "inode %p flush cookie %p", inode,
- vcookie->fscache);
+ p9_debug(P9_DEBUG_FSC, "inode %p flush cookie %p\n",
+ inode, v9inode->fscache);
- fscache_relinquish_cookie(vcookie->fscache, 1);
- vcookie->fscache = NULL;
+ fscache_relinquish_cookie(v9inode->fscache, 1);
+ v9inode->fscache = NULL;
}
void v9fs_cache_inode_set_cookie(struct inode *inode, struct file *filp)
{
- struct v9fs_cookie *vcookie = v9fs_inode2cookie(inode);
- struct p9_fid *fid;
+ struct v9fs_inode *v9inode = V9FS_I(inode);
- if (!vcookie->fscache)
+ if (!v9inode->fscache)
return;
- spin_lock(&vcookie->lock);
- fid = filp->private_data;
+ 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(&vcookie->lock);
+ spin_unlock(&v9inode->fscache_lock);
}
void v9fs_cache_inode_reset_cookie(struct inode *inode)
{
- struct v9fs_cookie *vcookie = v9fs_inode2cookie(inode);
+ struct v9fs_inode *v9inode = V9FS_I(inode);
struct v9fs_session_info *v9ses;
struct fscache_cookie *old;
- if (!vcookie->fscache)
+ if (!v9inode->fscache)
return;
- old = vcookie->fscache;
+ old = v9inode->fscache;
- spin_lock(&vcookie->lock);
- fscache_relinquish_cookie(vcookie->fscache, 1);
+ spin_lock(&v9inode->fscache_lock);
+ fscache_relinquish_cookie(v9inode->fscache, 1);
v9ses = v9fs_inode2v9ses(inode);
- vcookie->fscache = fscache_acquire_cookie(v9ses->fscache,
+ v9inode->fscache = fscache_acquire_cookie(v9ses->fscache,
&v9fs_cache_inode_index_def,
- vcookie);
+ v9inode, true);
+ p9_debug(P9_DEBUG_FSC, "inode %p revalidating cookie old %p new %p\n",
+ inode, old, v9inode->fscache);
- P9_DPRINTK(P9_DEBUG_FSC, "inode %p revalidating cookie old %p new %p",
- inode, old, vcookie->fscache);
-
- spin_unlock(&vcookie->lock);
+ spin_unlock(&v9inode->fscache_lock);
}
int __v9fs_fscache_release_page(struct page *page, gfp_t gfp)
{
struct inode *inode = page->mapping->host;
- struct v9fs_cookie *vcookie = v9fs_inode2cookie(inode);
+ struct v9fs_inode *v9inode = V9FS_I(inode);
- BUG_ON(!vcookie->fscache);
+ BUG_ON(!v9inode->fscache);
- return fscache_maybe_release_page(vcookie->fscache, page, gfp);
+ 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_cookie *vcookie = v9fs_inode2cookie(inode);
+ struct v9fs_inode *v9inode = V9FS_I(inode);
- BUG_ON(!vcookie->fscache);
+ BUG_ON(!v9inode->fscache);
if (PageFsCache(page)) {
- fscache_wait_on_page_write(vcookie->fscache, page);
+ fscache_wait_on_page_write(v9inode->fscache, page);
BUG_ON(!PageLocked(page));
- fscache_uncache_page(vcookie->fscache, page);
+ fscache_uncache_page(v9inode->fscache, page);
}
}
@@ -380,13 +320,13 @@ static void v9fs_vfs_readpage_complete(struct page *page, void *data,
int __v9fs_readpage_from_fscache(struct inode *inode, struct page *page)
{
int ret;
- const struct v9fs_cookie *vcookie = v9fs_inode2cookie(inode);
+ const struct v9fs_inode *v9inode = V9FS_I(inode);
- P9_DPRINTK(P9_DEBUG_FSC, "inode %p page %p", inode, page);
- if (!vcookie->fscache)
+ p9_debug(P9_DEBUG_FSC, "inode %p page %p\n", inode, page);
+ if (!v9inode->fscache)
return -ENOBUFS;
- ret = fscache_read_or_alloc_page(vcookie->fscache,
+ ret = fscache_read_or_alloc_page(v9inode->fscache,
page,
v9fs_vfs_readpage_complete,
NULL,
@@ -394,13 +334,13 @@ int __v9fs_readpage_from_fscache(struct inode *inode, struct page *page)
switch (ret) {
case -ENOBUFS:
case -ENODATA:
- P9_DPRINTK(P9_DEBUG_FSC, "page/inode not in cache %d", ret);
+ p9_debug(P9_DEBUG_FSC, "page/inode not in cache %d\n", ret);
return 1;
case 0:
- P9_DPRINTK(P9_DEBUG_FSC, "BIO submitted");
+ p9_debug(P9_DEBUG_FSC, "BIO submitted\n");
return ret;
default:
- P9_DPRINTK(P9_DEBUG_FSC, "ret %d", ret);
+ p9_debug(P9_DEBUG_FSC, "ret %d\n", ret);
return ret;
}
}
@@ -418,13 +358,13 @@ int __v9fs_readpages_from_fscache(struct inode *inode,
unsigned *nr_pages)
{
int ret;
- const struct v9fs_cookie *vcookie = v9fs_inode2cookie(inode);
+ const struct v9fs_inode *v9inode = V9FS_I(inode);
- P9_DPRINTK(P9_DEBUG_FSC, "inode %p pages %u", inode, *nr_pages);
- if (!vcookie->fscache)
+ p9_debug(P9_DEBUG_FSC, "inode %p pages %u\n", inode, *nr_pages);
+ if (!v9inode->fscache)
return -ENOBUFS;
- ret = fscache_read_or_alloc_pages(vcookie->fscache,
+ ret = fscache_read_or_alloc_pages(v9inode->fscache,
mapping, pages, nr_pages,
v9fs_vfs_readpage_complete,
NULL,
@@ -432,15 +372,15 @@ int __v9fs_readpages_from_fscache(struct inode *inode,
switch (ret) {
case -ENOBUFS:
case -ENODATA:
- P9_DPRINTK(P9_DEBUG_FSC, "pages/inodes not in cache %d", ret);
+ 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_DPRINTK(P9_DEBUG_FSC, "BIO submitted");
+ p9_debug(P9_DEBUG_FSC, "BIO submitted\n");
return ret;
default:
- P9_DPRINTK(P9_DEBUG_FSC, "ret %d", ret);
+ p9_debug(P9_DEBUG_FSC, "ret %d\n", ret);
return ret;
}
}
@@ -453,11 +393,22 @@ int __v9fs_readpages_from_fscache(struct inode *inode,
void __v9fs_readpage_to_fscache(struct inode *inode, struct page *page)
{
int ret;
- const struct v9fs_cookie *vcookie = v9fs_inode2cookie(inode);
+ const struct v9fs_inode *v9inode = V9FS_I(inode);
- P9_DPRINTK(P9_DEBUG_FSC, "inode %p page %p", inode, page);
- ret = fscache_write_page(vcookie->fscache, page, GFP_KERNEL);
- P9_DPRINTK(P9_DEBUG_FSC, "ret = %d", ret);
+ 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
index a94192bfaee..2f967549109 100644
--- a/fs/9p/cache.h
+++ b/fs/9p/cache.h
@@ -25,20 +25,6 @@
#include <linux/fscache.h>
#include <linux/spinlock.h>
-extern struct kmem_cache *vcookie_cache;
-
-struct v9fs_cookie {
- spinlock_t lock;
- struct inode inode;
- struct fscache_cookie *fscache;
- struct p9_qid *qid;
-};
-
-static inline struct v9fs_cookie *v9fs_inode2cookie(const struct inode *inode)
-{
- return container_of(inode, struct v9fs_cookie, inode);
-}
-
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;
@@ -64,23 +50,8 @@ extern int __v9fs_readpages_from_fscache(struct inode *inode,
struct list_head *pages,
unsigned *nr_pages);
extern void __v9fs_readpage_to_fscache(struct inode *inode, struct page *page);
-
-
-/**
- * v9fs_cache_register - Register v9fs file system with the cache
- */
-static inline int v9fs_cache_register(void)
-{
- return __v9fs_cache_register();
-}
-
-/**
- * v9fs_cache_unregister - Unregister v9fs from the cache
- */
-static inline void v9fs_cache_unregister(void)
-{
- __v9fs_cache_unregister();
-}
+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)
@@ -117,28 +88,30 @@ static inline void v9fs_readpage_to_fscache(struct inode *inode,
static inline void v9fs_uncache_page(struct inode *inode, struct page *page)
{
- struct v9fs_cookie *vcookie = v9fs_inode2cookie(inode);
- fscache_uncache_page(vcookie->fscache, page);
+ struct v9fs_inode *v9inode = V9FS_I(inode);
+ fscache_uncache_page(v9inode->fscache, page);
BUG_ON(PageFsCache(page));
}
-static inline void v9fs_vcookie_set_qid(struct inode *inode,
- struct p9_qid *qid)
+static inline void v9fs_fscache_wait_on_page_write(struct inode *inode,
+ struct page *page)
{
- struct v9fs_cookie *vcookie = v9fs_inode2cookie(inode);
- spin_lock(&vcookie->lock);
- vcookie->qid = qid;
- spin_unlock(&vcookie->lock);
+ return __v9fs_fscache_wait_on_page_write(inode, page);
}
#else /* CONFIG_9P_FSCACHE */
-static inline int v9fs_cache_register(void)
+static inline void v9fs_cache_inode_get_cookie(struct inode *inode)
{
- return 1;
}
-static inline void v9fs_cache_unregister(void) {}
+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) {
@@ -168,9 +141,11 @@ static inline void v9fs_readpage_to_fscache(struct inode *inode,
static inline void v9fs_uncache_page(struct inode *inode, struct page *page)
{}
-static inline void v9fs_vcookie_set_qid(struct inode *inode,
- struct p9_qid *qid)
-{}
+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 b00223c99d7..d51ec9fafcc 100644
--- a/fs/9p/fid.c
+++ b/fs/9p/fid.c
@@ -41,29 +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);
}
/**
@@ -74,24 +61,25 @@ 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;
@@ -125,46 +113,17 @@ err_out:
return -ENOMEM;
}
-/**
- * v9fs_fid_lookup - lookup for a fid, try to walk if not found
- * @dentry: dentry to look for fid in
- *
- * Look for a fid in the specified dentry for the current user.
- * If no fid is found, try to create one walking from a fid from the parent
- * dentry (if it has one), or the root dentry. If the user haven't accessed
- * the fs yet, attach now and walk from the root.
- */
-
-struct p9_fid *v9fs_fid_lookup(struct dentry *dentry)
+static struct p9_fid *v9fs_fid_lookup_with_uid(struct dentry *dentry,
+ kuid_t uid, int any)
{
- int i, n, l, clone, any, access;
- u32 uid;
- struct p9_fid *fid, *old_fid = NULL;
struct dentry *ds;
- struct v9fs_session_info *v9ses;
char **wnames, *uname;
+ int i, n, l, clone, access;
+ struct v9fs_session_info *v9ses;
+ struct p9_fid *fid, *old_fid = NULL;
- 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;
-
- case V9FS_ACCESS_ANY:
- uid = v9ses->uid;
- any = 1;
- break;
-
- default:
- uid = ~0;
- any = 0;
- break;
- }
-
fid = v9fs_fid_find(dentry, uid, any);
if (fid)
return fid;
@@ -243,13 +202,61 @@ struct p9_fid *v9fs_fid_lookup(struct dentry *dentry)
}
kfree(wnames);
fid_out:
- if (!IS_ERR(fid))
- v9fs_fid_add(dentry, fid);
+ 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
+ *
+ * Look for a fid in the specified dentry for the current user.
+ * If no fid is found, try to create one walking from a fid from the parent
+ * dentry (if it has one), or the root dentry. If the user haven't accessed
+ * the fs yet, attach now and walk from the root.
+ */
+
+struct p9_fid *v9fs_fid_lookup(struct dentry *dentry)
+{
+ kuid_t uid;
+ int any, access;
+ struct v9fs_session_info *v9ses;
+
+ 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;
+
+ case V9FS_ACCESS_ANY:
+ uid = v9ses->uid;
+ any = 1;
+ break;
+
+ default:
+ uid = INVALID_UID;
+ any = 0;
+ break;
+ }
+ return v9fs_fid_lookup_with_uid(dentry, uid, any);
+}
+
struct p9_fid *v9fs_fid_clone(struct dentry *dentry)
{
struct p9_fid *fid, *ret;
@@ -261,3 +268,39 @@ struct p9_fid *v9fs_fid_clone(struct dentry *dentry)
ret = p9_client_walk(fid, 0, NULL, 1);
return ret;
}
+
+static struct p9_fid *v9fs_fid_clone_with_uid(struct dentry *dentry, kuid_t uid)
+{
+ struct p9_fid *fid, *ret;
+
+ 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 2f77cd33ba8..6894b085f0e 100644
--- a/fs/9p/v9fs.c
+++ b/fs/9p/v9fs.c
@@ -23,6 +23,8 @@
*
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/fs.h>
@@ -39,6 +41,7 @@
static DEFINE_SPINLOCK(v9fs_sessionlist_lock);
static LIST_HEAD(v9fs_sessionlist);
+struct kmem_cache *v9fs_inode_cache;
/*
* Option Parsing (code inspired by NFS code)
@@ -53,9 +56,9 @@ enum {
/* Options that take no arguments */
Opt_nodevmap,
/* Cache options */
- Opt_cache_loose, Opt_fscache,
+ Opt_cache_loose, Opt_fscache, Opt_mmap,
/* Access options */
- Opt_access,
+ Opt_access, Opt_posixacl,
/* Error token */
Opt_err
};
@@ -71,11 +74,35 @@ static const match_table_t tokens = {
{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
@@ -95,7 +122,7 @@ static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts)
/* setup defaults */
v9ses->afid = ~0;
v9ses->debug = 0;
- v9ses->cache = 0;
+ v9ses->cache = CACHE_NONE;
#ifdef CONFIG_9P_FSCACHE
v9ses->cachetag = NULL;
#endif
@@ -111,21 +138,19 @@ static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts)
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;
@@ -133,19 +158,62 @@ static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts)
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;
@@ -156,6 +224,9 @@ static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts)
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]);
@@ -165,17 +236,17 @@ static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts)
s = match_strdup(&args[0]);
if (!s) {
ret = -ENOMEM;
- P9_DPRINTK(P9_DEBUG_ERROR,
- "problem allocating copy of cache arg\n");
+ 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;
}
- if (strcmp(s, "loose") == 0)
- v9ses->cache = CACHE_LOOSE;
- else if (strcmp(s, "fscache") == 0)
- v9ses->cache = CACHE_FSCACHE;
- else
- v9ses->cache = CACHE_NONE;
+ v9ses->cache = ret;
kfree(s);
break;
@@ -183,8 +254,8 @@ static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts)
s = match_strdup(&args[0]);
if (!s) {
ret = -ENOMEM;
- P9_DPRINTK(P9_DEBUG_ERROR,
- "problem allocating copy of access arg\n");
+ p9_debug(P9_DEBUG_ERROR,
+ "problem allocating copy of access arg\n");
goto free_and_return;
}
@@ -194,24 +265,39 @@ static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts)
else if (strcmp(s, "any") == 0)
v9ses->flags |= V9FS_ACCESS_ANY;
else if (strcmp(s, "client") == 0) {
-#ifdef CONFIG_9P_FS_POSIX_ACL
v9ses->flags |= V9FS_ACCESS_CLIENT;
-#else
- P9_DPRINTK(P9_DEBUG_ERROR,
- "access=client option not supported\n");
- kfree(s);
- ret = -EINVAL;
- goto free_and_return;
-#endif
} 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;
}
@@ -238,21 +324,21 @@ 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);
rc = bdi_setup_and_register(&v9ses->bdi, "9p", BDI_CAP_MAP_COPY);
if (rc) {
- __putname(v9ses->aname);
- __putname(v9ses->uname);
+ kfree(v9ses->aname);
+ kfree(v9ses->uname);
return ERR_PTR(rc);
}
@@ -260,31 +346,32 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses,
list_add(&v9ses->slist, &v9fs_sessionlist);
spin_unlock(&v9fs_sessionlist_lock);
- v9ses->flags = V9FS_ACCESS_USER;
- strcpy(v9ses->uname, V9FS_DEFUSER);
- strcpy(v9ses->aname, V9FS_DEFANAME);
- v9ses->uid = ~0;
+ v9ses->uid = INVALID_UID;
v9ses->dfltuid = V9FS_DEFUID;
v9ses->dfltgid = V9FS_DEFGID;
- rc = v9fs_parse_options(v9ses, data);
- if (rc < 0) {
- retval = rc;
- goto error;
- }
-
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 (p9_is_proto_dotl(v9ses->clnt))
+ 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))
+ } 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;
@@ -304,22 +391,30 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses,
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 */
@@ -352,8 +447,8 @@ void v9fs_session_close(struct v9fs_session_info *v9ses)
kfree(v9ses->cachetag);
}
#endif
- __putname(v9ses->uname);
- __putname(v9ses->aname);
+ kfree(v9ses->uname);
+ kfree(v9ses->aname);
bdi_destroy(&v9ses->bdi);
@@ -370,7 +465,7 @@ 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);
}
@@ -383,7 +478,7 @@ void v9fs_session_cancel(struct v9fs_session_info *v9ses) {
void v9fs_session_begin_cancel(struct v9fs_session_info *v9ses)
{
- P9_DPRINTK(P9_DEBUG_ERROR, "begin cancel session %p\n", v9ses);
+ p9_debug(P9_DEBUG_ERROR, "begin cancel session %p\n", v9ses);
p9_client_begin_disconnect(v9ses->clnt);
}
@@ -442,7 +537,7 @@ static struct attribute_group v9fs_attr_group = {
*
*/
-static int v9fs_sysfs_init(void)
+static int __init v9fs_sysfs_init(void)
{
v9fs_kobj = kobject_create_and_add("9p", fs_kobj);
if (!v9fs_kobj)
@@ -467,6 +562,69 @@ static void v9fs_sysfs_cleanup(void)
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
*
@@ -475,23 +633,23 @@ static void v9fs_sysfs_cleanup(void)
static int __init init_v9fs(void)
{
int err;
- printk(KERN_INFO "Installing v9fs 9p2000 file system support\n");
+ pr_info("Installing v9fs 9p2000 file system support\n");
/* TODO: Setup list of registered trasnport modules */
- err = register_filesystem(&v9fs_fs_type);
- if (err < 0) {
- printk(KERN_ERR "Failed to register filesystem\n");
- return err;
- }
err = v9fs_cache_register();
if (err < 0) {
- printk(KERN_ERR "Failed to register v9fs for caching\n");
- goto out_fs_unreg;
+ pr_err("Failed to register v9fs for caching\n");
+ return err;
}
err = v9fs_sysfs_init();
if (err < 0) {
- printk(KERN_ERR "Failed to register with sysfs\n");
+ 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;
}
@@ -500,8 +658,8 @@ static int __init init_v9fs(void)
out_sysfs_cleanup:
v9fs_sysfs_cleanup();
-out_fs_unreg:
- unregister_filesystem(&v9fs_fs_type);
+out_cache:
+ v9fs_cache_unregister();
return err;
}
diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h
index cb6396855e2..099c7712631 100644
--- a/fs/9p/v9fs.h
+++ b/fs/9p/v9fs.h
@@ -20,6 +20,9 @@
* Boston, MA 02111-1301 USA
*
*/
+#ifndef FS_9P_V9FS_H
+#define FS_9P_V9FS_H
+
#include <linux/backing-dev.h>
/**
@@ -28,8 +31,10 @@
* @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
*/
@@ -37,13 +42,15 @@
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_PROTO_2000U = 0x01,
V9FS_PROTO_2000L = 0x02,
V9FS_ACCESS_SINGLE = 0x04,
V9FS_ACCESS_USER = 0x08,
- V9FS_ACCESS_CLIENT = 0x10
+ V9FS_ACCESS_CLIENT = 0x10,
+ V9FS_POSIX_ACL = 0x20
};
/* possible values of ->cache */
@@ -57,6 +64,7 @@ enum p9_session_flags {
enum p9_cache_modes {
CACHE_NONE,
+ CACHE_MMAP,
CACHE_LOOSE,
CACHE_FSCACHE,
};
@@ -102,33 +110,75 @@ struct v9fs_session_info {
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 list_head slist; /* list of sessions registered with v9fs */
struct backing_dev_info bdi;
struct rw_semaphore rename_sem;
};
+/* 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);
-void v9fs_session_begin_cancel(struct v9fs_session_info *v9ses);
+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 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;
@@ -138,3 +188,41 @@ static inline int v9fs_proto_dotl(struct v9fs_session_info *v9ses)
{
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 bab0eac873f..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.
@@ -36,6 +38,7 @@
* 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;
@@ -45,13 +48,17 @@ 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;
-#ifdef CONFIG_9P_FSCACHE
struct inode *v9fs_alloc_inode(struct super_block *sb);
void v9fs_destroy_inode(struct inode *inode);
-#endif
-
-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);
+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 *);
@@ -59,12 +66,25 @@ 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, int datasync);
+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;
+}
-#define P9_LOCK_TIMEOUT (30*HZ)
+int v9fs_open_to_dotl_flags(int flags);
+#endif
diff --git a/fs/9p/vfs_addr.c b/fs/9p/vfs_addr.c
index b7f2a8e3863..cc1cfae726b 100644
--- a/fs/9p/vfs_addr.c
+++ b/fs/9p/vfs_addr.c
@@ -33,22 +33,23 @@
#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;
@@ -56,7 +57,7 @@ static int v9fs_vfs_readpage(struct file *filp, struct page *page)
struct inode *inode;
inode = page->mapping->host;
- P9_DPRINTK(P9_DEBUG_VFS, "\n");
+ p9_debug(P9_DEBUG_VFS, "\n");
BUG_ON(!PageLocked(page));
@@ -67,7 +68,7 @@ static int v9fs_vfs_readpage(struct file *filp, struct page *page)
buffer = kmap(page);
offset = page_offset(page);
- retval = v9fs_file_readn(filp, buffer, NULL, PAGE_CACHE_SIZE, offset);
+ retval = v9fs_fid_readn(fid, buffer, NULL, PAGE_CACHE_SIZE, offset);
if (retval < 0) {
v9fs_uncache_page(inode, page);
goto done;
@@ -87,6 +88,19 @@ done:
}
/**
+ * 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
@@ -103,14 +117,14 @@ static int v9fs_vfs_readpages(struct file *filp, struct address_space *mapping,
struct inode *inode;
inode = mapping->host;
- P9_DPRINTK(P9_DEBUG_VFS, "inode: %p file: %p\n", inode, filp);
+ 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_DPRINTK(P9_DEBUG_VFS, " = %d\n", ret);
+ p9_debug(P9_DEBUG_VFS, " = %d\n", ret);
return ret;
}
@@ -124,7 +138,6 @@ static int v9fs_release_page(struct page *page, gfp_t gfp)
{
if (PagePrivate(page))
return 0;
-
return v9fs_fscache_release_page(page, gfp);
}
@@ -135,22 +148,94 @@ static int v9fs_release_page(struct page *page, gfp_t gfp)
* @offset: offset in the page
*/
-static void v9fs_invalidate_page(struct page *page, unsigned long offset)
+static void v9fs_invalidate_page(struct page *page, unsigned int offset,
+ unsigned int length)
{
- if (offset == 0)
+ /*
+ * 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
- * Since the writes go directly to the server, we simply return a 0
- * here to indicate success.
- *
* 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;
}
@@ -173,21 +258,103 @@ static int v9fs_launder_page(struct page *page)
* with an error.
*
*/
-ssize_t v9fs_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov,
- loff_t pos, unsigned long nr_segs)
+static ssize_t
+v9fs_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter, loff_t pos)
{
- P9_DPRINTK(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, nr_segs);
+ /*
+ * 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,
- .readpages = v9fs_vfs_readpages,
- .releasepage = v9fs_release_page,
- .invalidatepage = v9fs_invalidate_page,
- .launder_page = v9fs_launder_page,
- .direct_IO = v9fs_direct_IO,
+ .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 cbf4e50f393..b03dd23feda 100644
--- a/fs/9p/vfs_dentry.c
+++ b/fs/9p/vfs_dentry.c
@@ -43,40 +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;
}
@@ -86,31 +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 b84ebe8cefe..0b3bfa303dd 100644
--- a/fs/9p/vfs_dir.c
+++ b/fs/9p/vfs_dir.c
@@ -42,7 +42,6 @@
/**
* struct p9_rdir - readdir accounting
- * @mutex: mutex protecting readdir
* @head: start offset of current dirread buffer
* @tail: end offset of current dirread buffer
* @buf: dirread buffer
@@ -52,10 +51,9 @@
*/
struct p9_rdir {
- struct mutex mutex;
int head;
int tail;
- uint8_t *buf;
+ uint8_t buf[];
};
/**
@@ -93,46 +91,24 @@ static void p9stat_init(struct p9_wstat *stbuf)
*
*/
-static int v9fs_alloc_rdir_buf(struct file *filp, int buflen)
+static struct p9_rdir *v9fs_alloc_rdir_buf(struct file *filp, int buflen)
{
- struct p9_rdir *rdir;
- struct p9_fid *fid;
- int err = 0;
-
- fid = filp->private_data;
- if (!fid->rdir) {
- rdir = kmalloc(sizeof(struct p9_rdir) + buflen, GFP_KERNEL);
-
- if (rdir == NULL) {
- err = -ENOMEM;
- goto exit;
- }
- spin_lock(&filp->f_dentry->d_lock);
- if (!fid->rdir) {
- rdir->buf = (uint8_t *)rdir + sizeof(struct p9_rdir);
- mutex_init(&rdir->mutex);
- rdir->head = rdir->tail = 0;
- fid->rdir = (void *) rdir;
- rdir = NULL;
- }
- spin_unlock(&filp->f_dentry->d_lock);
- kfree(rdir);
- }
-exit:
- return err;
+ 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 - read a directory
- * @filp: opened file structure
- * @dirent: directory structure ???
- * @filldir: function to populate directory structure ???
+ * 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 *filp, void *dirent, filldir_t filldir)
+static int v9fs_dir_readdir(struct file *file, struct dir_context *ctx)
{
- int over;
+ bool over;
struct p9_wstat st;
int err = 0;
struct p9_fid *fid;
@@ -140,100 +116,77 @@ static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir)
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;
- err = v9fs_alloc_rdir_buf(filp, buflen);
- if (err)
- goto exit;
- rdir = (struct p9_rdir *) fid->rdir;
+ rdir = v9fs_alloc_rdir_buf(file, buflen);
+ if (!rdir)
+ return -ENOMEM;
- err = mutex_lock_interruptible(&rdir->mutex);
- if (err)
- return err;
- while (err == 0) {
+ while (1) {
if (rdir->tail == rdir->head) {
- err = v9fs_file_readn(filp, rdir->buf, NULL,
- buflen, filp->f_pos);
+ err = v9fs_file_readn(file, rdir->buf, NULL,
+ buflen, ctx->pos);
if (err <= 0)
- goto unlock_and_exit;
+ return err;
rdir->head = 0;
rdir->tail = err;
}
while (rdir->head < rdir->tail) {
p9stat_init(&st);
- err = p9stat_read(rdir->buf + rdir->head,
- rdir->tail - rdir->head, &st,
- fid->clnt->proto_version);
+ 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 unlock_and_exit;
+ return -EIO;
}
reclen = st.size+2;
- over = filldir(dirent, st.name, strlen(st.name),
- filp->f_pos, v9fs_qid2ino(&st.qid), dt_type(&st));
-
+ over = !dir_emit(ctx, st.name, strlen(st.name),
+ v9fs_qid2ino(&st.qid), dt_type(&st));
p9stat_free(&st);
+ if (over)
+ return 0;
- if (over) {
- err = 0;
- goto unlock_and_exit;
- }
rdir->head += reclen;
- filp->f_pos += reclen;
+ ctx->pos += reclen;
}
}
-
-unlock_and_exit:
- mutex_unlock(&rdir->mutex);
-exit:
- return err;
}
/**
- * v9fs_dir_readdir_dotl - read a directory
- * @filp: opened file structure
- * @dirent: buffer to fill dirent structures
- * @filldir: function to populate dirent structures
+ * 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 *filp, void *dirent,
- filldir_t filldir)
+static int v9fs_dir_readdir_dotl(struct file *file, struct dir_context *ctx)
{
- int over;
int err = 0;
struct p9_fid *fid;
int buflen;
struct p9_rdir *rdir;
struct p9_dirent curdirent;
- u64 oldoffset = 0;
- 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_READDIRHDRSZ;
- err = v9fs_alloc_rdir_buf(filp, buflen);
- if (err)
- goto exit;
- rdir = (struct p9_rdir *) fid->rdir;
-
- err = mutex_lock_interruptible(&rdir->mutex);
- if (err)
- return err;
+ rdir = v9fs_alloc_rdir_buf(file, buflen);
+ if (!rdir)
+ return -ENOMEM;
- while (err == 0) {
+ while (1) {
if (rdir->tail == rdir->head) {
err = p9_client_readdir(fid, rdir->buf, buflen,
- filp->f_pos);
+ ctx->pos);
if (err <= 0)
- goto unlock_and_exit;
+ return err;
rdir->head = 0;
rdir->tail = err;
@@ -241,42 +194,24 @@ static int v9fs_dir_readdir_dotl(struct file *filp, void *dirent,
while (rdir->head < rdir->tail) {
- err = p9dirent_read(rdir->buf + rdir->head,
- rdir->tail - rdir->head,
- &curdirent,
- fid->clnt->proto_version);
+ err = p9dirent_read(fid->clnt, rdir->buf + rdir->head,
+ rdir->tail - rdir->head,
+ &curdirent);
if (err < 0) {
- P9_DPRINTK(P9_DEBUG_VFS, "returned %d\n", err);
- err = -EIO;
- goto unlock_and_exit;
+ p9_debug(P9_DEBUG_VFS, "returned %d\n", err);
+ return -EIO;
}
- /* d_off in dirent structure tracks the offset into
- * the next dirent in the dir. However, filldir()
- * expects offset into the current dirent. Hence
- * while calling filldir send the offset from the
- * previous dirent structure.
- */
- over = filldir(dirent, curdirent.d_name,
- strlen(curdirent.d_name),
- oldoffset, v9fs_qid2ino(&curdirent.qid),
- curdirent.d_type);
- oldoffset = curdirent.d_off;
-
- if (over) {
- err = 0;
- goto unlock_and_exit;
- }
+ if (!dir_emit(ctx, curdirent.d_name,
+ strlen(curdirent.d_name),
+ v9fs_qid2ino(&curdirent.qid),
+ curdirent.d_type))
+ return 0;
- filp->f_pos = curdirent.d_off;
+ ctx->pos = curdirent.d_off;
rdir->head += err;
}
}
-
-unlock_and_exit:
- mutex_unlock(&rdir->mutex);
-exit:
- return err;
}
@@ -292,10 +227,8 @@ int v9fs_dir_release(struct inode *inode, struct file *filp)
struct p9_fid *fid;
fid = filp->private_data;
- P9_DPRINTK(P9_DEBUG_VFS,
- "v9fs_dir_release: inode: %p filp: %p fid: %d\n",
- inode, filp, fid ? fid->fid : -1);
- filemap_write_and_wait(inode->i_mapping);
+ 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;
@@ -304,7 +237,7 @@ int v9fs_dir_release(struct inode *inode, struct file *filp)
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,
};
@@ -312,7 +245,7 @@ const struct file_operations v9fs_dir_operations = {
const struct file_operations v9fs_dir_operations_dotl = {
.read = generic_read_dir,
.llseek = generic_file_llseek,
- .readdir = v9fs_dir_readdir_dotl,
+ .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 240c3067439..520c11c2dcc 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -44,8 +44,8 @@
#include "fid.h"
#include "cache.h"
-static const struct file_operations v9fs_cached_file_operations;
-static const struct file_operations v9fs_cached_file_operations_dotl;
+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)
@@ -57,14 +57,16 @@ static const struct file_operations v9fs_cached_file_operations_dotl;
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);
if (v9fs_proto_dotl(v9ses))
- omode = file->f_flags;
+ omode = v9fs_open_to_dotl_flags(file->f_flags);
else
omode = v9fs_uflags2omode(file->f_flags,
v9fs_proto_dotu(v9ses));
@@ -79,30 +81,39 @@ int v9fs_file_open(struct inode *inode, struct file *file)
p9_client_clunk(fid);
return err;
}
- if (file->f_flags & O_TRUNC) {
- i_size_write(inode, 0);
- inode->i_blocks = 0;
- }
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;
- else if (file->f_op == &v9fs_file_operations_dotl)
- file->f_op = &v9fs_cached_file_operations_dotl;
-
-#ifdef CONFIG_9P_FSCACHE
- v9fs_cache_inode_set_cookie(inode, file);
-#endif
+ 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;
}
/**
@@ -118,9 +129,9 @@ 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) && fl->fl_type != F_UNLCK)
@@ -154,14 +165,25 @@ static int v9fs_file_do_lock(struct file *filp, int cmd, struct file_lock *fl)
/* convert posix lock to p9 tlock args */
memset(&flock, 0, sizeof(flock));
- flock.type = fl->fl_type;
+ /* 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 = utsname()->nodename;
+ flock.client_id = fid->clnt->name;
if (IS_SETLKW(cmd))
flock.flags = P9_LOCK_FLAGS_BLOCK;
@@ -178,7 +200,8 @@ static int v9fs_file_do_lock(struct file *filp, int cmd, struct file_lock *fl)
break;
if (status == P9_LOCK_BLOCKED && !IS_SETLKW(cmd))
break;
- schedule_timeout_interruptible(P9_LOCK_TIMEOUT);
+ if (schedule_timeout_interruptible(P9_LOCK_TIMEOUT) != 0)
+ break;
}
/* map 9p status to VFS status */
@@ -230,29 +253,38 @@ static int v9fs_file_getlock(struct file *filp, struct file_lock *fl)
/* convert posix lock to p9 tgetlock args */
memset(&glock, 0, sizeof(glock));
- glock.type = fl->fl_type;
+ 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 = utsname()->nodename;
+ glock.client_id = fid->clnt->name;
res = p9_client_getlock_dotl(fid, &glock);
if (res < 0)
return res;
- if (glock.type != F_UNLCK) {
- fl->fl_type = glock.type;
+ /* 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;
- } else
- fl->fl_type = F_UNLCK;
-
+ }
return res;
}
@@ -266,11 +298,11 @@ static int v9fs_file_getlock(struct file *filp, struct file_lock *fl)
static int v9fs_file_lock_dotl(struct file *filp, int cmd, struct file_lock *fl)
{
- struct inode *inode = filp->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(filp);
int ret = -ENOLCK;
- P9_DPRINTK(P9_DEBUG_VFS, "filp: %p cmd:%d lock: %p name: %s\n", filp,
- cmd, fl, filp->f_path.dentry->d_name.name);
+ 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)
@@ -302,11 +334,11 @@ out_err:
static int v9fs_file_flock_dotl(struct file *filp, int cmd,
struct file_lock *fl)
{
- struct inode *inode = filp->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(filp);
int ret = -ENOLCK;
- P9_DPRINTK(P9_DEBUG_VFS, "filp: %p cmd:%d lock: %p name: %s\n", filp,
- cmd, fl, filp->f_path.dentry->d_name.name);
+ 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)
@@ -320,9 +352,6 @@ static int v9fs_file_flock_dotl(struct file *filp, int cmd,
invalidate_mapping_pages(&inode->i_data, 0, -1);
}
/* Convert flock to posix lock */
- fl->fl_owner = (fl_owner_t)filp;
- fl->fl_start = 0;
- fl->fl_end = OFFSET_MAX;
fl->fl_flags |= FL_POSIX;
fl->fl_flags ^= FL_FLOCK;
@@ -335,25 +364,22 @@ out_err:
}
/**
- * v9fs_file_readn - read from a file
- * @filp: file pointer to read
+ * 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, size;
- 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);
+ 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;
@@ -379,6 +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
@@ -395,7 +437,7 @@ v9fs_file_read(struct file *filp, char __user *udata, size_t count,
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;
size = fid->iounit ? fid->iounit : fid->clnt->msize - P9_IOHDRSZ;
@@ -410,6 +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
@@ -418,25 +501,13 @@ 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;
- size_t total = 0;
- int n;
- struct p9_fid *fid;
- struct p9_client *clnt;
- struct inode *inode = filp->f_path.dentry->d_inode;
+ ssize_t retval = 0;
loff_t origin = *offset;
- unsigned long pg_start, pg_end;
- P9_DPRINTK(P9_DEBUG_VFS, "data %p count %d offset %x\n", data,
- (int)count, (int)*offset);
-
- fid = filp->private_data;
- clnt = fid->clnt;
retval = generic_write_checks(filp, &origin, &count, 0);
if (retval)
@@ -449,84 +520,353 @@ v9fs_file_write(struct file *filp, const char __user * data,
if (!count)
goto out;
- do {
- n = p9_client_write(fid, NULL, data+total, origin+total, count);
- if (n <= 0)
- break;
- count -= n;
- total += n;
- } while (count > 0);
-
- if (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_write(inode, i_size_read(inode) + total);
- inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9;
- }
-
- if (n < 0)
- retval = n;
- else
- retval = total;
+ 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, int datasync)
+
+static int v9fs_file_fsync(struct file *filp, loff_t start, loff_t end,
+ int datasync)
{
struct p9_fid *fid;
+ struct inode *inode = filp->f_mapping->host;
struct p9_wstat wstat;
int retval;
- P9_DPRINTK(P9_DEBUG_VFS, "filp %p datasync %x\n", filp, datasync);
+ 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;
v9fs_blank_wstat(&wstat);
retval = p9_client_wstat(fid, &wstat);
+ mutex_unlock(&inode->i_mutex);
+
return retval;
}
-int v9fs_file_fsync_dotl(struct file *filp, int datasync)
+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;
- P9_DPRINTK(P9_DEBUG_VFS, "v9fs_file_fsync_dotl: filp %p datasync %x\n",
- filp, datasync);
+ 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;
+}
+
+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);
+}
+
+/**
+ * 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)
+{
+
+ if (filp->f_flags & O_DIRECT)
+ return v9fs_direct_write(filp, data, count, offset);
+ return new_sync_write(filp, data, count, offset);
+}
+
+
+/**
+ * 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 file_operations v9fs_cached_file_operations = {
+
+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,
};
-static const struct file_operations v9fs_cached_file_operations_dotl = {
+const struct file_operations v9fs_cached_file_operations_dotl = {
.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_dotl,
.flock = v9fs_file_flock_dotl,
- .mmap = generic_file_readonly_mmap,
+ .mmap = v9fs_file_mmap,
.fsync = v9fs_file_fsync_dotl,
};
@@ -552,3 +892,26 @@ const struct file_operations v9fs_file_operations_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 34bf71b5654..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>
@@ -49,15 +51,8 @@
static const struct inode_operations v9fs_dir_inode_operations;
static const struct inode_operations v9fs_dir_inode_operations_dotu;
-static const struct inode_operations v9fs_dir_inode_operations_dotl;
static const struct inode_operations v9fs_file_inode_operations;
-static const struct inode_operations v9fs_file_inode_operations_dotl;
static const struct inode_operations v9fs_symlink_inode_operations;
-static const struct inode_operations v9fs_symlink_inode_operations_dotl;
-
-static int
-v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode,
- dev_t rdev);
/**
* unixmode2p9mode - convert unix mode bits to plan 9
@@ -66,15 +61,13 @@ v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode,
*
*/
-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_proto_dotu(v9ses)) {
- if (S_ISLNK(mode))
- res |= P9_DMSYMLINK;
if (v9ses->nodev == 0) {
if (S_ISSOCK(mode))
res |= P9_DMSOCKET;
@@ -92,25 +85,51 @@ 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;
@@ -123,21 +142,26 @@ static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode)
&& (v9ses->nodev == 0))
res |= S_IFIFO;
else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses))
- && (v9ses->nodev == 0))
- res |= S_IFBLK;
- else
- res |= S_IFREG;
-
- if (v9fs_proto_dotu(v9ses)) {
- if ((mode & P9_DMSETUID) == P9_DMSETUID)
- res |= S_ISUID;
-
- if ((mode & P9_DMSETGID) == P9_DMSETGID)
- res |= S_ISGID;
+ && (v9ses->nodev == 0)) {
+ char type = 0, ext[32];
+ int major = -1, minor = -1;
- 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;
}
@@ -168,9 +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;
@@ -204,32 +225,31 @@ 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;
}
-#ifdef CONFIG_9P_FSCACHE
/**
* v9fs_alloc_inode - helper function to allocate an inode
- * This callback is executed before setting up the inode so that we
- * can associate a vcookie with each inode.
*
*/
-
struct inode *v9fs_alloc_inode(struct super_block *sb)
{
- struct v9fs_cookie *vcookie;
- vcookie = (struct v9fs_cookie *)kmem_cache_alloc(vcookie_cache,
- GFP_KERNEL);
- if (!vcookie)
+ struct v9fs_inode *v9inode;
+ v9inode = (struct v9fs_inode *)kmem_cache_alloc(v9fs_inode_cache,
+ GFP_KERNEL);
+ if (!v9inode)
return NULL;
-
- vcookie->fscache = NULL;
- vcookie->qid = NULL;
- spin_lock_init(&vcookie->lock);
- return &vcookie->inode;
+#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;
}
/**
@@ -237,71 +257,25 @@ struct inode *v9fs_alloc_inode(struct super_block *sb)
*
*/
-void v9fs_destroy_inode(struct inode *inode)
+static void v9fs_i_callback(struct rcu_head *head)
{
- kmem_cache_free(vcookie_cache, v9fs_inode2cookie(inode));
+ struct inode *inode = container_of(head, struct inode, i_rcu);
+ kmem_cache_free(v9fs_inode_cache, V9FS_I(inode));
}
-#endif
-
-/**
- * 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 gid_t v9fs_get_fsgid_for_create(struct inode *dir_inode)
+void v9fs_destroy_inode(struct inode *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();
+ call_rcu(&inode->i_rcu, v9fs_i_callback);
}
-/**
- * v9fs_dentry_from_dir_inode - helper function to get the dentry from
- * dir inode.
- *
- */
-
-static struct dentry *v9fs_dentry_from_dir_inode(struct inode *inode)
+int v9fs_init_inode(struct v9fs_session_info *v9ses,
+ struct inode *inode, umode_t mode, dev_t rdev)
{
- struct dentry *dentry;
-
- spin_lock(&dcache_lock);
- /* Directory should have only one entry. */
- BUG_ON(S_ISDIR(inode->i_mode) && !list_is_singular(&inode->i_dentry));
- dentry = list_entry(inode->i_dentry.next, struct dentry, d_alias);
- spin_unlock(&dcache_lock);
- return dentry;
-}
-
-/**
- * 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)
-{
- 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);
-
- inode = new_inode(sb);
- if (!inode) {
- P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n");
- return ERR_PTR(-ENOMEM);
- }
+ int err = 0;
inode_init_owner(inode, NULL, mode);
inode->i_blocks = 0;
- inode->i_rdev = 0;
+ inode->i_rdev = rdev;
inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
inode->i_mapping->a_ops = &v9fs_addr_operations;
@@ -312,13 +286,11 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode)
case S_IFSOCK:
if (v9fs_proto_dotl(v9ses)) {
inode->i_op = &v9fs_file_inode_operations_dotl;
- inode->i_fop = &v9fs_file_operations_dotl;
} else if (v9fs_proto_dotu(v9ses)) {
inode->i_op = &v9fs_file_inode_operations;
- inode->i_fop = &v9fs_file_operations;
} else {
- P9_DPRINTK(P9_DEBUG_ERROR,
- "special files without extended mode\n");
+ p9_debug(P9_DEBUG_ERROR,
+ "special files without extended mode\n");
err = -EINVAL;
goto error;
}
@@ -327,18 +299,31 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode)
case S_IFREG:
if (v9fs_proto_dotl(v9ses)) {
inode->i_op = &v9fs_file_inode_operations_dotl;
- inode->i_fop = &v9fs_file_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;
- inode->i_fop = &v9fs_file_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_DPRINTK(P9_DEBUG_ERROR, "extended modes used with "
- "legacy protocol.\n");
+ p9_debug(P9_DEBUG_ERROR,
+ "extended modes used with legacy protocol\n");
err = -EINVAL;
goto error;
}
@@ -365,17 +350,43 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode)
break;
default:
- P9_DPRINTK(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n",
- mode, mode & S_IFMT);
+ 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;
- return inode;
+}
-error:
- iput(inode);
- return ERR_PTR(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, umode_t mode, dev_t rdev)
+{
+ int err;
+ struct inode *inode;
+ struct v9fs_session_info *v9ses = sb->s_fs_info;
+
+ p9_debug(P9_DEBUG_VFS, "super block: %p mode: %ho\n", sb, mode);
+
+ inode = new_inode(sb);
+ 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;
}
/*
@@ -438,129 +449,183 @@ error:
*/
void v9fs_evict_inode(struct inode *inode)
{
- truncate_inode_pages(inode->i_mapping, 0);
- end_writeback(inode);
+ struct v9fs_inode *v9inode = V9FS_I(inode);
+
+ truncate_inode_pages_final(inode->i_mapping);
+ clear_inode(inode);
filemap_fdatawrite(inode->i_mapping);
-#ifdef CONFIG_9P_FSCACHE
v9fs_cache_inode_put_cookie(inode);
-#endif
+ /* clunk the fid stashed in writeback_fid */
+ if (v9inode->writeback_fid) {
+ p9_client_clunk(v9inode->writeback_fid);
+ v9inode->writeback_fid = NULL;
+ }
}
-static struct inode *
-v9fs_inode(struct v9fs_session_info *v9ses, struct p9_fid *fid,
- struct super_block *sb)
+static int v9fs_test_inode(struct inode *inode, void *data)
{
- int err, umode;
- struct inode *ret = NULL;
- struct p9_wstat *st;
+ 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;
+}
- st = p9_client_stat(fid);
- if (IS_ERR(st))
- return ERR_CAST(st);
+static int v9fs_test_new_inode(struct inode *inode, void *data)
+{
+ return 0;
+}
- umode = p9mode2unixmode(v9ses, st->mode);
- ret = v9fs_get_inode(sb, umode);
- if (IS_ERR(ret)) {
- err = PTR_ERR(ret);
- goto error;
- }
+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;
- v9fs_stat2inode(st, ret, sb);
- ret->i_ino = v9fs_qid2ino(&st->qid);
+ memcpy(&v9inode->qid, &st->qid, sizeof(st->qid));
+ return 0;
+}
-#ifdef CONFIG_9P_FSCACHE
- v9fs_vcookie_set_qid(ret, &st->qid);
- v9fs_cache_inode_get_cookie(ret);
-#endif
- p9stat_free(st);
- kfree(st);
- return ret;
+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:
- p9stat_free(st);
- kfree(st);
- return ERR_PTR(err);
+ unlock_new_inode(inode);
+ iput(inode);
+ return ERR_PTR(retval);
+
}
-static struct inode *
-v9fs_inode_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid,
- struct super_block *sb)
+struct inode *
+v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
+ struct super_block *sb, int new)
{
- struct inode *ret = NULL;
- int err;
- struct p9_stat_dotl *st;
+ struct p9_wstat *st;
+ struct inode *inode = NULL;
- st = p9_client_getattr_dotl(fid, P9_STATS_BASIC);
+ st = p9_client_stat(fid);
if (IS_ERR(st))
return ERR_CAST(st);
- ret = v9fs_get_inode(sb, st->st_mode);
- if (IS_ERR(ret)) {
- err = PTR_ERR(ret);
- goto error;
- }
-
- v9fs_stat2inode_dotl(st, ret);
- ret->i_ino = v9fs_qid2ino(&st->qid);
-#ifdef CONFIG_9P_FSCACHE
- v9fs_vcookie_set_qid(ret, &st->qid);
- v9fs_cache_inode_get_cookie(ret);
-#endif
- err = v9fs_get_acl(ret, fid);
- if (err) {
- iput(ret);
- goto error;
- }
- kfree(st);
- return ret;
-error:
+ inode = v9fs_qid_iget(sb, &st->qid, st, new);
+ p9stat_free(st);
kfree(st);
- return ERR_PTR(err);
+ return inode;
}
/**
- * v9fs_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
- *
+ * v9fs_at_to_dotl_flags- convert Linux specific AT flags to
+ * plan 9 AT flag.
+ * @flags: flags to convert
*/
-static inline struct inode *
-v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
- struct super_block *sb)
+static int v9fs_at_to_dotl_flags(int flags)
{
- if (v9fs_proto_dotl(v9ses))
- return v9fs_inode_dotl(v9ses, fid, sb);
- else
- return v9fs_inode(v9ses, fid, sb);
+ 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)
{
- int retval;
- struct inode *file_inode;
- struct p9_fid *v9fid;
+ struct inode *inode;
+ int retval = -EOPNOTSUPP;
+ struct p9_fid *v9fid, *dfid;
+ struct v9fs_session_info *v9ses;
- 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;
- v9fid = v9fs_fid_clone(file);
- if (IS_ERR(v9fid))
- return PTR_ERR(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);
- retval = p9_client_remove(v9fid);
- if (!retval)
- drop_nlink(file_inode);
+ v9fs_invalidate_inode_attr(inode);
+ v9fs_invalidate_inode_attr(dir);
+ }
return retval;
}
@@ -583,7 +648,7 @@ 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;
@@ -592,7 +657,7 @@ v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
dfid = v9fs_fid_lookup(dentry->d_parent);
if (IS_ERR(dfid)) {
err = PTR_ERR(dfid);
- P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
+ p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
return ERR_PTR(err);
}
@@ -600,250 +665,79 @@ v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
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);
+ 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);
- goto error;
- }
-
- /* 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_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
- fid = NULL;
+ p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err);
goto error;
}
- /* 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 (v9ses->cache)
- dentry->d_op = &v9fs_cached_dentry_operations;
- else
- dentry->d_op = &v9fs_dentry_operations;
-
- d_instantiate(dentry, inode);
- err = v9fs_fid_add(dentry, fid);
- if (err < 0)
- goto error;
-
- return ofid;
-
-error:
- if (ofid)
- p9_client_clunk(ofid);
-
- if (fid)
- p9_client_clunk(fid);
-
- return ERR_PTR(err);
-}
-
-/**
- * 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
- * @mode: create permissions
- * @nd: path information
- *
- */
-
-static int
-v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int omode,
- struct nameidata *nd)
-{
- int err = 0;
- char *name = NULL;
- gid_t gid;
- int flags;
- mode_t mode;
- struct v9fs_session_info *v9ses;
- struct p9_fid *fid = NULL;
- struct p9_fid *dfid, *ofid;
- struct file *filp;
- struct p9_qid qid;
- struct inode *inode;
- struct posix_acl *pacl = NULL, *dacl = NULL;
-
- v9ses = v9fs_inode2v9ses(dir);
- if (nd && nd->flags & LOOKUP_OPEN)
- flags = nd->intent.open.flags - 1;
- else {
- /*
- * create call without LOOKUP_OPEN is due
- * to mknod of regular files. So use mknod
- * operation.
- */
- return v9fs_vfs_mknod_dotl(dir, dentry, omode, 0);
- }
-
- name = (char *) dentry->d_name.name;
- P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_create_dotl: name:%s flags:0x%x "
- "mode:0x%x\n", name, flags, omode);
-
- dfid = v9fs_fid_lookup(dentry->d_parent);
- if (IS_ERR(dfid)) {
- err = PTR_ERR(dfid);
- P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
- return 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);
- return err;
- }
-
- 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_DPRINTK(P9_DEBUG_VFS,
- "Failed to get acl values in creat %d\n", err);
- goto error;
- }
- err = p9_client_create_dotl(ofid, name, flags, mode, gid, &qid);
- if (err < 0) {
- P9_DPRINTK(P9_DEBUG_VFS,
- "p9_client_open_dotl failed in creat %d\n",
- err);
- goto error;
- }
- /* instantiate inode and assign the unopened fid to the dentry */
- if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE ||
- (nd && nd->flags & LOOKUP_OPEN)) {
+ 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_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
- err);
+ p9_debug(P9_DEBUG_VFS,
+ "p9_client_walk failed %d\n", err);
fid = NULL;
goto error;
}
-
- 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;
- }
- dentry->d_op = &v9fs_cached_dentry_operations;
- d_instantiate(dentry, inode);
- err = v9fs_fid_add(dentry, fid);
- if (err < 0)
- goto error;
- /* The fid would get clunked via a dput */
- fid = NULL;
- } 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
+ * instantiate inode and assign the unopened fid to the dentry
*/
- inode = v9fs_get_inode(dir->i_sb, mode);
+ 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;
}
- dentry->d_op = &v9fs_dentry_operations;
+ v9fs_fid_add(dentry, fid);
d_instantiate(dentry, inode);
}
- /* Now set the ACL based on the default value */
- v9fs_set_create_acl(dentry, dacl, pacl);
-
- /* 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, generic_file_open);
- if (IS_ERR(filp)) {
- p9_client_clunk(ofid);
- return PTR_ERR(filp);
- }
- filp->private_data = ofid;
- } else
- p9_client_clunk(ofid);
-
- return 0;
-
+ return ofid;
error:
if (ofid)
p9_client_clunk(ofid);
+
if (fid)
p9_client_clunk(fid);
- return err;
+
+ return ERR_PTR(err);
}
/**
- * 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_proto_dotu(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, generic_file_open);
- 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;
}
/**
@@ -854,14 +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);
@@ -869,112 +763,14 @@ static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
if (IS_ERR(fid)) {
err = PTR_ERR(fid);
fid = NULL;
- }
-
- if (fid)
- p9_client_clunk(fid);
-
- return err;
-}
-
-
-/**
- * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory
- * @dir: inode that is being unlinked
- * @dentry: dentry that is being unlinked
- * @mode: mode for new directory
- *
- */
-
-static int v9fs_vfs_mkdir_dotl(struct inode *dir,
- struct dentry *dentry, int omode)
-{
- int err;
- struct v9fs_session_info *v9ses;
- struct p9_fid *fid = NULL, *dfid = NULL;
- gid_t gid;
- char *name;
- mode_t mode;
- struct inode *inode;
- struct p9_qid qid;
- struct dentry *dir_dentry;
- struct posix_acl *dacl = NULL, *pacl = NULL;
-
- P9_DPRINTK(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 = v9fs_dentry_from_dir_inode(dir);
- dfid = v9fs_fid_lookup(dir_dentry);
- if (IS_ERR(dfid)) {
- err = PTR_ERR(dfid);
- P9_DPRINTK(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_DPRINTK(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;
-
- /* instantiate inode and assign the unopened fid to the dentry */
- if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
- fid = p9_client_walk(dfid, 1, &name, 1);
- if (IS_ERR(fid)) {
- err = PTR_ERR(fid);
- P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
- err);
- fid = NULL;
- goto error;
- }
-
- 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;
- }
- dentry->d_op = &v9fs_cached_dentry_operations;
- d_instantiate(dentry, inode);
- err = v9fs_fid_add(dentry, fid);
- if (err < 0)
- goto error;
- fid = NULL;
} 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);
- if (IS_ERR(inode)) {
- err = PTR_ERR(inode);
- goto error;
- }
- dentry->d_op = &v9fs_dentry_operations;
- d_instantiate(dentry, inode);
+ inc_nlink(dir);
+ v9fs_invalidate_inode_attr(dir);
}
- /* Now set the ACL based on the default value */
- v9fs_set_create_acl(dentry, dacl, pacl);
-error:
if (fid)
p9_client_clunk(fid);
+
return err;
}
@@ -982,27 +778,25 @@ error:
* 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);
@@ -1012,41 +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) {
- inode = NULL;
- goto inst_out;
+ 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;
+}
+
+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);
- return ERR_PTR(result);
+ 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)
- goto error_iput;
+ 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;
-inst_out:
- if (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_iput:
- iput(inode);
error:
- p9_client_clunk(fid);
-
- return ERR_PTR(result);
+ if (fid)
+ p9_client_clunk(fid);
+ goto out;
}
/**
@@ -1056,7 +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);
}
@@ -1068,9 +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);
}
/**
@@ -1082,21 +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))
@@ -1116,9 +990,12 @@ v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
down_write(&v9ses->rename_sem);
if (v9fs_proto_dotl(v9ses)) {
- retval = p9_client_rename(oldfid, newdirfid,
- (char *) new_dentry->d_name.name);
- if (retval != -ENOSYS)
+ 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) {
@@ -1126,8 +1003,7 @@ v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
* 9P .u can only handle file rename in the same directory
*/
- P9_DPRINTK(P9_DEBUG_ERROR,
- "old dir and new dir are different\n");
+ p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n");
retval = -EXDEV;
goto clunk_newdir;
}
@@ -1137,9 +1013,25 @@ v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
retval = p9_client_wstat(oldfid, &wstat);
clunk_newdir:
- if (!retval)
+ 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);
@@ -1162,17 +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 || v9ses->cache == CACHE_FSCACHE)
- 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);
@@ -1182,45 +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);
-
- p9stat_free(st);
- kfree(st);
- return 0;
-}
-
-static int
-v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry,
- struct kstat *stat)
-{
- int err;
- struct v9fs_session_info *v9ses;
- struct p9_fid *fid;
- struct p9_stat_dotl *st;
-
- P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry);
- err = -EPERM;
- v9ses = v9fs_inode2v9ses(dentry->d_inode);
- if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
- return simple_getattr(mnt, dentry, stat);
-
- 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;
+ p9stat_free(st);
kfree(st);
return 0;
}
@@ -1239,9 +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);
@@ -1267,77 +1126,22 @@ 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)
return retval;
if ((iattr->ia_valid & ATTR_SIZE) &&
- iattr->ia_size != i_size_read(dentry->d_inode)) {
- retval = vmtruncate(dentry->d_inode, iattr->ia_size);
- if (retval)
- return retval;
- }
+ iattr->ia_size != i_size_read(dentry->d_inode))
+ truncate_setsize(dentry->d_inode, iattr->ia_size);
- setattr_copy(dentry->d_inode, iattr);
- mark_inode_dirty(dentry->d_inode);
- return 0;
-}
-
-/**
- * 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 v9fs_session_info *v9ses;
- struct p9_fid *fid;
- struct p9_iattr_dotl p9attr;
-
- P9_DPRINTK(P9_DEBUG_VFS, "\n");
-
- retval = inode_change_ok(dentry->d_inode, iattr);
- if (retval)
- return retval;
-
- p9attr.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;
-
- retval = -EPERM;
- v9ses = v9fs_inode2v9ses(dentry->d_inode);
- fid = v9fs_fid_lookup(dentry);
- if (IS_ERR(fid))
- return PTR_ERR(fid);
-
- retval = p9_client_setattr(fid, &p9attr);
- if (retval < 0)
- return retval;
-
- if ((iattr->ia_valid & ATTR_SIZE) &&
- iattr->ia_size != i_size_read(dentry->d_inode)) {
- retval = vmtruncate(dentry->d_inode, iattr->ia_size);
- if (retval)
- return retval;
- }
+ v9fs_invalidate_inode_attr(dentry->d_inode);
setattr_copy(dentry->d_inode, iattr);
mark_inode_dirty(dentry->d_inode);
- if (iattr->ia_valid & ATTR_MODE) {
- /* We also want to update ACL when we update mode bits */
- retval = v9fs_acl_chmod(dentry);
- if (retval < 0)
- return retval;
- }
return 0;
}
@@ -1353,12 +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;
@@ -1380,113 +1186,21 @@ v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode,
* this even with .u extension. So check
* for non NULL stat->extension
*/
- strncpy(ext, stat->extension, sizeof(ext));
+ strlcpy(ext, stat->extension, sizeof(ext));
/* HARDLINKCOUNT %u */
sscanf(ext, "%13s %u", tag_name, &i_nlink);
if (!strncmp(tag_name, "HARDLINKCOUNT", 13))
- inode->i_nlink = i_nlink;
+ set_nlink(inode, i_nlink);
}
}
- 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;
-
+ 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 = (i_size_read(inode) + 512 - 1) >> 9;
-}
-
-/**
- * v9fs_stat2inode_dotl - populate an inode structure with stat info
- * @stat: stat structure
- * @inode: inode to populate
- * @sb: superblock of filesystem
- *
- */
-
-void
-v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *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;
- inode->i_nlink = stat->st_nlink;
- inode->i_mode = stat->st_mode;
- inode->i_rdev = new_decode_dev(stat->st_rdev);
-
- if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode)))
- init_special_inode(inode, inode->i_mode, inode->i_rdev);
-
- 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)
- inode->i_nlink = 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;
}
/**
@@ -1525,9 +1239,9 @@ 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);
@@ -1545,12 +1259,12 @@ 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);
+ p9_debug(P9_DEBUG_VFS, "%s -> %s (%.*s)\n",
+ dentry->d_name.name, st->extension, buflen, buffer);
- retval = strnlen(buffer, buflen);
done:
p9stat_free(st);
kfree(st);
@@ -1569,7 +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);
@@ -1595,13 +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);
}
@@ -1610,123 +1324,34 @@ 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_proto_dotu(v9ses)) {
- P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n");
+ 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;
}
/**
- * v9fs_vfs_symlink_dotl - helper function to create symlinks
- * @dir: directory inode containing symlink
- * @dentry: dentry for symlink
- * @symname: symlink data
- *
- * See Also: 9P2000.L RFC for more information
- *
- */
-
-static int
-v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry,
- const char *symname)
-{
- struct v9fs_session_info *v9ses;
- struct p9_fid *dfid;
- struct p9_fid *fid = NULL;
- struct inode *inode;
- struct p9_qid qid;
- char *name;
- int err;
- gid_t gid;
-
- name = (char *) dentry->d_name.name;
- P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_symlink_dotl : %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_DPRINTK(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_DPRINTK(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err);
- goto error;
- }
-
- if (v9ses->cache) {
- /* 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_DPRINTK(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_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;
- }
- dentry->d_op = &v9fs_cached_dentry_operations;
- d_instantiate(dentry, inode);
- err = v9fs_fid_add(dentry, fid);
- if (err < 0)
- goto error;
- fid = NULL;
- } else {
- /* Not in cached mode. No need to populate inode with stat */
- inode = v9fs_get_inode(dir->i_sb, S_IFLNK);
- if (IS_ERR(inode)) {
- err = PTR_ERR(inode);
- goto error;
- }
- dentry->d_op = &v9fs_dentry_operations;
- d_instantiate(dentry, inode);
- }
-
-error:
- if (fid)
- p9_client_clunk(fid);
-
- return err;
-}
-
-/**
* v9fs_vfs_symlink - helper function to create symlinks
* @dir: directory inode containing symlink
* @dentry: dentry for symlink
@@ -1739,10 +1364,10 @@ error:
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);
}
/**
@@ -1758,12 +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))
@@ -1778,84 +1402,16 @@ 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;
}
/**
- * 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 p9_fid *dfid, *oldfid;
- char *name;
- struct v9fs_session_info *v9ses;
- struct dentry *dir_dentry;
-
- P9_DPRINTK(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 = v9fs_dentry_from_dir_inode(dir);
- 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);
-
- name = (char *) dentry->d_name.name;
-
- err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name);
-
- if (err < 0) {
- P9_DPRINTK(P9_DEBUG_VFS, "p9_client_link failed %d\n", err);
- return err;
- }
-
- if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
- /* Get the latest stat info from server. */
- struct p9_fid *fid;
- struct p9_stat_dotl *st;
-
- fid = v9fs_fid_lookup(old_dentry);
- if (IS_ERR(fid))
- return PTR_ERR(fid);
-
- st = p9_client_getattr_dotl(fid, P9_STATS_BASIC);
- if (IS_ERR(st))
- return PTR_ERR(st);
-
- v9fs_stat2inode_dotl(st, old_dentry->d_inode);
-
- kfree(st);
- } else {
- /* Caching disabled. No need to get upto date stat info.
- * This dentry will be released immediately. So, just hold the
- * inode
- */
- ihold(old_dentry->d_inode);
- }
-
- dentry->d_op = old_dentry->d_op;
- d_instantiate(dentry, old_dentry->d_inode);
-
- return err;
-}
-
-/**
* v9fs_vfs_mknod - create a special file
* @dir: inode destination for new link
* @dentry: dentry for file
@@ -1865,14 +1421,16 @@ v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
*/
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;
@@ -1894,169 +1452,52 @@ v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
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;
}
-/**
- * v9fs_vfs_mknod_dotl - create a special file
- * @dir: inode destination for new link
- * @dentry: dentry for file
- * @mode: mode for creation
- * @rdev: device associated with special file
- *
- */
-static int
-v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode,
- dev_t rdev)
+int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode)
{
- int err;
- char *name;
- mode_t mode;
+ int umode;
+ dev_t rdev;
+ loff_t i_size;
+ struct p9_wstat *st;
struct v9fs_session_info *v9ses;
- struct p9_fid *fid = NULL, *dfid = NULL;
- struct inode *inode;
- gid_t gid;
- struct p9_qid qid;
- struct dentry *dir_dentry;
- struct posix_acl *dacl = NULL, *pacl = NULL;
-
- P9_DPRINTK(P9_DEBUG_VFS,
- " %lu,%s mode: %x 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 = v9fs_dentry_from_dir_inode(dir);
- dfid = v9fs_fid_lookup(dir_dentry);
- if (IS_ERR(dfid)) {
- err = PTR_ERR(dfid);
- P9_DPRINTK(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_DPRINTK(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;
-
- /* instantiate inode and assign the unopened fid to the dentry */
- if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
- fid = p9_client_walk(dfid, 1, &name, 1);
- if (IS_ERR(fid)) {
- err = PTR_ERR(fid);
- P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
- err);
- fid = NULL;
- goto error;
- }
-
- 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;
- }
- dentry->d_op = &v9fs_cached_dentry_operations;
- d_instantiate(dentry, inode);
- err = v9fs_fid_add(dentry, fid);
- if (err < 0)
- goto error;
- fid = NULL;
- } 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);
- if (IS_ERR(inode)) {
- err = PTR_ERR(inode);
- goto error;
- }
- dentry->d_op = &v9fs_dentry_operations;
- d_instantiate(dentry, inode);
- }
- /* Now set the ACL based on the default value */
- v9fs_set_create_acl(dentry, dacl, pacl);
-error:
- if (fid)
- p9_client_clunk(fid);
- return err;
-}
-
-static int
-v9fs_vfs_readlink_dotl(struct dentry *dentry, char *buffer, int buflen)
-{
- int retval;
- struct p9_fid *fid;
- char *target = NULL;
-
- P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name);
- retval = -EPERM;
- fid = v9fs_fid_lookup(dentry);
- if (IS_ERR(fid))
- return PTR_ERR(fid);
-
- retval = p9_client_readlink(fid, &target);
- if (retval < 0)
- return retval;
-
- strncpy(buffer, target, buflen);
- P9_DPRINTK(P9_DEBUG_VFS, "%s -> %s\n", dentry->d_name.name, buffer);
-
- retval = strnlen(buffer, buflen);
- return retval;
-}
-
-/**
- * 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 len = 0;
- char *link = __getname();
-
- P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name);
-
- if (!link)
- link = ERR_PTR(-ENOMEM);
- else {
- len = v9fs_vfs_readlink_dotl(dentry, link, PATH_MAX);
- if (len < 0) {
- __putname(link);
- link = ERR_PTR(len);
- } else
- link[min(len, PATH_MAX-1)] = 0;
- }
- nd_set_link(nd, link);
-
- return NULL;
+ 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,
@@ -2068,28 +1509,10 @@ static const struct inode_operations v9fs_dir_inode_operations_dotu = {
.setattr = v9fs_vfs_setattr,
};
-static const struct inode_operations v9fs_dir_inode_operations_dotl = {
- .create = v9fs_vfs_create_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,
- .check_acl = v9fs_check_acl,
-};
-
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,
@@ -2104,16 +1527,6 @@ static const struct inode_operations v9fs_file_inode_operations = {
.setattr = v9fs_vfs_setattr,
};
-static 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,
- .check_acl = v9fs_check_acl,
-};
-
static const struct inode_operations v9fs_symlink_inode_operations = {
.readlink = generic_readlink,
.follow_link = v9fs_vfs_follow_link,
@@ -2122,14 +1535,3 @@ static const struct inode_operations v9fs_symlink_inode_operations = {
.setattr = v9fs_vfs_setattr,
};
-static const struct inode_operations v9fs_symlink_inode_operations_dotl = {
- .readlink = v9fs_vfs_readlink_dotl,
- .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_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 c55c614500a..0afd0382822 100644
--- a/fs/9p/vfs_super.c
+++ b/fs/9p/vfs_super.c
@@ -86,12 +86,15 @@ v9fs_fill_super(struct super_block *sb, struct v9fs_session_info *v9ses,
} 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 = flags | MS_ACTIVE | MS_SYNCHRONOUS | MS_DIRSYNC |
- MS_NOATIME;
+ 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_ACCESS_MASK) == V9FS_ACCESS_CLIENT)
+ if ((v9ses->flags & V9FS_ACL_MASK) == V9FS_POSIX_ACL)
sb->s_flags |= MS_POSIXACL;
#endif
@@ -114,11 +117,11 @@ static struct dentry *v9fs_mount(struct file_system_type *fs_type, int flags,
struct inode *inode = NULL;
struct dentry *root = NULL;
struct v9fs_session_info *v9ses = NULL;
- int mode = S_IRWXUGO | S_ISVTX;
+ 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");
v9ses = kzalloc(sizeof(struct v9fs_session_info), GFP_KERNEL);
if (!v9ses)
@@ -134,22 +137,26 @@ static struct dentry *v9fs_mount(struct file_system_type *fs_type, int flags,
goto close_session;
}
- 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 clunk_fid;
}
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;
}
- root = d_alloc_root(inode);
+ root = d_make_root(inode);
if (!root) {
- iput(inode);
retval = -ENOMEM;
goto release_sb;
}
@@ -161,7 +168,7 @@ static struct dentry *v9fs_mount(struct file_system_type *fs_type, int flags,
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 {
@@ -183,7 +190,7 @@ static struct dentry *v9fs_mount(struct file_system_type *fs_type, int flags,
goto release_sb;
v9fs_fid_add(root, fid);
- P9_DPRINTK(P9_DEBUG_VFS, " simple set mount, return 0\n");
+ p9_debug(P9_DEBUG_VFS, " simple set mount, return 0\n");
return dget(sb->s_root);
clunk_fid:
@@ -215,10 +222,7 @@ 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);
-
- if (s->s_root)
- v9fs_dentry_release(s->s_root); /* clunk root */
+ p9_debug(P9_DEBUG_VFS, " %p\n", s);
kill_anon_super(s);
@@ -226,7 +230,7 @@ static void v9fs_kill_super(struct super_block *s)
v9fs_session_close(v9ses);
kfree(v9ses);
s->s_fs_info = NULL;
- P9_DPRINTK(P9_DEBUG_VFS, "exiting kill_super\n");
+ p9_debug(P9_DEBUG_VFS, "exiting kill_super\n");
}
static void
@@ -251,11 +255,11 @@ static int v9fs_statfs(struct dentry *dentry, struct kstatfs *buf)
goto done;
}
- v9ses = v9fs_inode2v9ses(dentry->d_inode);
+ v9ses = v9fs_dentry2v9ses(dentry);
if (v9fs_proto_dotl(v9ses)) {
res = p9_client_statfs(fid, &rs);
if (res == 0) {
- buf->f_type = V9FS_MAGIC;
+ buf->f_type = rs.type;
buf->f_bsize = rs.bsize;
buf->f_blocks = rs.blocks;
buf->f_bfree = rs.bfree;
@@ -274,26 +278,86 @@ done:
return res;
}
+static int v9fs_drop_inode(struct inode *inode)
+{
+ 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;
+}
+
+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 = {
-#ifdef CONFIG_9P_FSCACHE
.alloc_inode = v9fs_alloc_inode,
.destroy_inode = v9fs_destroy_inode,
-#endif
.statfs = simple_statfs,
.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 = {
-#ifdef CONFIG_9P_FSCACHE
.alloc_inode = v9fs_alloc_inode,
.destroy_inode = v9fs_destroy_inode,
-#endif
.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 = {
@@ -303,3 +367,4 @@ struct file_system_type v9fs_fs_type = {
.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
index 43ec7df8433..f95e01e058e 100644
--- a/fs/9p/xattr.c
+++ b/fs/9p/xattr.c
@@ -32,8 +32,8 @@ ssize_t v9fs_fid_xattr_get(struct p9_fid *fid, const char *name,
attr_fid = p9_client_xattrwalk(fid, name, &attr_size);
if (IS_ERR(attr_fid)) {
retval = PTR_ERR(attr_fid);
- P9_DPRINTK(P9_DEBUG_VFS,
- "p9_client_attrwalk failed %zd\n", retval);
+ p9_debug(P9_DEBUG_VFS, "p9_client_attrwalk failed %zd\n",
+ retval);
attr_fid = NULL;
goto error;
}
@@ -87,8 +87,8 @@ ssize_t v9fs_xattr_get(struct dentry *dentry, const char *name,
{
struct p9_fid *fid;
- P9_DPRINTK(P9_DEBUG_VFS, "%s: name = %s value_len = %zu\n",
- __func__, name, buffer_size);
+ 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);
@@ -111,29 +111,36 @@ ssize_t v9fs_xattr_get(struct dentry *dentry, const char *name,
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;
- struct p9_fid *fid = NULL;
- P9_DPRINTK(P9_DEBUG_VFS, "%s: name = %s value_len = %zu flags = %d\n",
- __func__, name, value_len, flags);
+ 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);
- fid = v9fs_fid_clone(dentry);
- if (IS_ERR(fid)) {
- retval = PTR_ERR(fid);
- fid = NULL;
- goto error;
- }
/*
* On success fid points to xattr
*/
retval = p9_client_xattrcreate(fid, name, value_len, flags);
if (retval < 0) {
- P9_DPRINTK(P9_DEBUG_VFS,
- "p9_client_xattrcreate failed %d\n", retval);
- goto error;
+ p9_debug(P9_DEBUG_VFS, "p9_client_xattrcreate failed %d\n",
+ retval);
+ goto err;
}
- msize = fid->clnt->msize;;
+ msize = fid->clnt->msize;
while (value_len) {
if (value_len > (msize - P9_IOHDRSZ))
write_count = msize - P9_IOHDRSZ;
@@ -144,16 +151,14 @@ int v9fs_xattr_set(struct dentry *dentry, const char *name,
if (write_count < 0) {
/* error in xattr write */
retval = write_count;
- goto error;
+ goto err;
}
offset += write_count;
value_len -= write_count;
}
- /* Total read xattr bytes */
- retval = offset;
-error:
- if (fid)
- retval = p9_client_clunk(fid);
+ retval = 0;
+err:
+ p9_client_clunk(fid);
return retval;
}
@@ -164,9 +169,13 @@ ssize_t v9fs_listxattr(struct dentry *dentry, char *buffer, size_t 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
index eaa837c53bd..d3e2ea3840b 100644
--- a/fs/9p/xattr.h
+++ b/fs/9p/xattr.h
@@ -20,6 +20,8 @@
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;
@@ -27,6 +29,8 @@ 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);
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,
+};
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-08 00:51:13 +0000