1 files changed, 155 insertions, 314 deletions

diff --git a/fs/reiserfs/xattr_acl.c b/fs/reiserfs/xattr_acl.c
index b7e4fa4539d..44503e29379 100644
--- a/fs/reiserfs/xattr_acl.c
+++ b/fs/reiserfs/xattr_acl.c
@@ -1,64 +1,49 @@
 #include <linux/capability.h>
 #include <linux/fs.h>
 #include <linux/posix_acl.h>
-#include <linux/reiserfs_fs.h>
+#include "reiserfs.h"
 #include <linux/errno.h>
 #include <linux/pagemap.h>
 #include <linux/xattr.h>
+#include <linux/slab.h>
 #include <linux/posix_acl_xattr.h>
-#include <linux/reiserfs_xattr.h>
-#include <linux/reiserfs_acl.h>
+#include "xattr.h"
+#include "acl.h"
 #include <asm/uaccess.h>
 
-static int reiserfs_set_acl(struct inode *inode, int type,
+static int __reiserfs_set_acl(struct reiserfs_transaction_handle *th,
+			    struct inode *inode, int type,
 			    struct posix_acl *acl);
 
-static int
-xattr_set_acl(struct inode *inode, int type, const void *value, size_t size)
-{
-	struct posix_acl *acl;
-	int error;
-
-	if (!reiserfs_posixacl(inode->i_sb))
-		return -EOPNOTSUPP;
-	if (!is_owner_or_cap(inode))
-		return -EPERM;
-
-	if (value) {
-		acl = posix_acl_from_xattr(value, size);
-		if (IS_ERR(acl)) {
-			return PTR_ERR(acl);
-		} else if (acl) {
-			error = posix_acl_valid(acl);
-			if (error)
-				goto release_and_out;
-		}
-	} else
-		acl = NULL;
 
-	error = reiserfs_set_acl(inode, type, acl);
-
-      release_and_out:
-	posix_acl_release(acl);
-	return error;
-}
-
-static int
-xattr_get_acl(struct inode *inode, int type, void *buffer, size_t size)
+int
+reiserfs_set_acl(struct inode *inode, struct posix_acl *acl, int type)
 {
-	struct posix_acl *acl;
-	int error;
-
-	if (!reiserfs_posixacl(inode->i_sb))
-		return -EOPNOTSUPP;
-
-	acl = reiserfs_get_acl(inode, type);
-	if (IS_ERR(acl))
-		return PTR_ERR(acl);
-	if (acl == NULL)
-		return -ENODATA;
-	error = posix_acl_to_xattr(acl, buffer, size);
-	posix_acl_release(acl);
+	int error, error2;
+	struct reiserfs_transaction_handle th;
+	size_t jcreate_blocks;
+	int size = acl ? posix_acl_xattr_size(acl->a_count) : 0;
+
+
+	/*
+	 * Pessimism: We can't assume that anything from the xattr root up
+	 * has been created.
+	 */
+
+	jcreate_blocks = reiserfs_xattr_jcreate_nblocks(inode) +
+			 reiserfs_xattr_nblocks(inode, size) * 2;
+
+	reiserfs_write_lock(inode->i_sb);
+	error = journal_begin(&th, inode->i_sb, jcreate_blocks);
+	reiserfs_write_unlock(inode->i_sb);
+	if (error == 0) {
+		error = __reiserfs_set_acl(&th, inode, type, acl);
+		reiserfs_write_lock(inode->i_sb);
+		error2 = journal_end(&th);
+		reiserfs_write_unlock(inode->i_sb);
+		if (error2)
+			error = error2;
+	}
 
 	return error;
 }
@@ -66,7 +51,7 @@ xattr_get_acl(struct inode *inode, int type, void *buffer, size_t size)
 /*
  * Convert from filesystem to in-memory representation.
  */
-static struct posix_acl *posix_acl_from_disk(const void *value, size_t size)
+static struct posix_acl *reiserfs_posix_acl_from_disk(const void *value, size_t size)
 {
 	const char *end = (char *)value + size;
 	int n, count;
@@ -101,15 +86,23 @@ static struct posix_acl *posix_acl_from_disk(const void *value, size_t size)
 		case ACL_OTHER:
 			value = (char *)value +
 			    sizeof(reiserfs_acl_entry_short);
-			acl->a_entries[n].e_id = ACL_UNDEFINED_ID;
 			break;
 
 		case ACL_USER:
+			value = (char *)value + sizeof(reiserfs_acl_entry);
+			if ((char *)value > end)
+				goto fail;
+			acl->a_entries[n].e_uid = 
+				make_kuid(&init_user_ns,
+					  le32_to_cpu(entry->e_id));
+			break;
 		case ACL_GROUP:
 			value = (char *)value + sizeof(reiserfs_acl_entry);
 			if ((char *)value > end)
 				goto fail;
-			acl->a_entries[n].e_id = le32_to_cpu(entry->e_id);
+			acl->a_entries[n].e_gid =
+				make_kgid(&init_user_ns,
+					  le32_to_cpu(entry->e_id));
 			break;
 
 		default:
@@ -120,7 +113,7 @@ static struct posix_acl *posix_acl_from_disk(const void *value, size_t size)
 		goto fail;
 	return acl;
 
-      fail:
+fail:
 	posix_acl_release(acl);
 	return ERR_PTR(-EINVAL);
 }
@@ -128,7 +121,7 @@ static struct posix_acl *posix_acl_from_disk(const void *value, size_t size)
 /*
  * Convert from in-memory to filesystem representation.
  */
-static void *posix_acl_to_disk(const struct posix_acl *acl, size_t * size)
+static void *reiserfs_posix_acl_to_disk(const struct posix_acl *acl, size_t * size)
 {
 	reiserfs_acl_header *ext_acl;
 	char *e;
@@ -144,13 +137,19 @@ static void *posix_acl_to_disk(const struct posix_acl *acl, size_t * size)
 	ext_acl->a_version = cpu_to_le32(REISERFS_ACL_VERSION);
 	e = (char *)ext_acl + sizeof(reiserfs_acl_header);
 	for (n = 0; n < acl->a_count; n++) {
+		const struct posix_acl_entry *acl_e = &acl->a_entries[n];
 		reiserfs_acl_entry *entry = (reiserfs_acl_entry *) e;
 		entry->e_tag = cpu_to_le16(acl->a_entries[n].e_tag);
 		entry->e_perm = cpu_to_le16(acl->a_entries[n].e_perm);
 		switch (acl->a_entries[n].e_tag) {
 		case ACL_USER:
+			entry->e_id = cpu_to_le32(
+				from_kuid(&init_user_ns, acl_e->e_uid));
+			e += sizeof(reiserfs_acl_entry);
+			break;
 		case ACL_GROUP:
-			entry->e_id = cpu_to_le32(acl->a_entries[n].e_id);
+			entry->e_id = cpu_to_le32(
+				from_kgid(&init_user_ns, acl_e->e_gid));
 			e += sizeof(reiserfs_acl_entry);
 			break;
 
@@ -167,7 +166,7 @@ static void *posix_acl_to_disk(const struct posix_acl *acl, size_t * size)
 	}
 	return (char *)ext_acl;
 
-      fail:
+fail:
 	kfree(ext_acl);
 	return ERR_PTR(-EINVAL);
 }
@@ -181,34 +180,25 @@ static void *posix_acl_to_disk(const struct posix_acl *acl, size_t * size)
 struct posix_acl *reiserfs_get_acl(struct inode *inode, int type)
 {
 	char *name, *value;
-	struct posix_acl *acl, **p_acl;
+	struct posix_acl *acl;
 	int size;
 	int retval;
-	struct reiserfs_inode_info *reiserfs_i = REISERFS_I(inode);
 
 	switch (type) {
 	case ACL_TYPE_ACCESS:
 		name = POSIX_ACL_XATTR_ACCESS;
-		p_acl = &reiserfs_i->i_acl_access;
 		break;
 	case ACL_TYPE_DEFAULT:
 		name = POSIX_ACL_XATTR_DEFAULT;
-		p_acl = &reiserfs_i->i_acl_default;
 		break;
 	default:
-		return ERR_PTR(-EINVAL);
+		BUG();
 	}
 
-	if (IS_ERR(*p_acl)) {
-		if (PTR_ERR(*p_acl) == -ENODATA)
-			return NULL;
-	} else if (*p_acl != NULL)
-		return posix_acl_dup(*p_acl);
-
 	size = reiserfs_xattr_get(inode, name, NULL, 0);
 	if (size < 0) {
 		if (size == -ENODATA || size == -ENOSYS) {
-			*p_acl = ERR_PTR(-ENODATA);
+			set_cached_acl(inode, type, NULL);
 			return NULL;
 		}
 		return ERR_PTR(size);
@@ -220,17 +210,18 @@ struct posix_acl *reiserfs_get_acl(struct inode *inode, int type)
 
 	retval = reiserfs_xattr_get(inode, name, value, size);
 	if (retval == -ENODATA || retval == -ENOSYS) {
-		/* This shouldn't actually happen as it should have
-		   been caught above.. but just in case */
+		/*
+		 * This shouldn't actually happen as it should have
+		 * been caught above.. but just in case
+		 */
 		acl = NULL;
-		*p_acl = ERR_PTR(-ENODATA);
 	} else if (retval < 0) {
 		acl = ERR_PTR(retval);
 	} else {
-		acl = posix_acl_from_disk(value, retval);
-		if (!IS_ERR(acl))
-			*p_acl = posix_acl_dup(acl);
+		acl = reiserfs_posix_acl_from_disk(value, retval);
 	}
+	if (!IS_ERR(acl))
+		set_cached_acl(inode, type, acl);
 
 	kfree(value);
 	return acl;
@@ -243,29 +234,22 @@ struct posix_acl *reiserfs_get_acl(struct inode *inode, int type)
  * BKL held [before 2.5.x]
  */
 static int
-reiserfs_set_acl(struct inode *inode, int type, struct posix_acl *acl)
+__reiserfs_set_acl(struct reiserfs_transaction_handle *th, struct inode *inode,
+		 int type, struct posix_acl *acl)
 {
 	char *name;
 	void *value = NULL;
-	struct posix_acl **p_acl;
-	size_t size;
+	size_t size = 0;
 	int error;
-	struct reiserfs_inode_info *reiserfs_i = REISERFS_I(inode);
-
-	if (S_ISLNK(inode->i_mode))
-		return -EOPNOTSUPP;
 
 	switch (type) {
 	case ACL_TYPE_ACCESS:
 		name = POSIX_ACL_XATTR_ACCESS;
-		p_acl = &reiserfs_i->i_acl_access;
 		if (acl) {
-			mode_t mode = inode->i_mode;
-			error = posix_acl_equiv_mode(acl, &mode);
+			error = posix_acl_equiv_mode(acl, &inode->i_mode);
 			if (error < 0)
 				return error;
 			else {
-				inode->i_mode = mode;
 				if (error == 0)
 					acl = NULL;
 			}
@@ -273,7 +257,6 @@ reiserfs_set_acl(struct inode *inode, int type, struct posix_acl *acl)
 		break;
 	case ACL_TYPE_DEFAULT:
 		name = POSIX_ACL_XATTR_DEFAULT;
-		p_acl = &reiserfs_i->i_acl_default;
 		if (!S_ISDIR(inode->i_mode))
 			return acl ? -EACCES : 0;
 		break;
@@ -282,285 +265,143 @@ reiserfs_set_acl(struct inode *inode, int type, struct posix_acl *acl)
 	}
 
 	if (acl) {
-		value = posix_acl_to_disk(acl, &size);
+		value = reiserfs_posix_acl_to_disk(acl, &size);
 		if (IS_ERR(value))
 			return (int)PTR_ERR(value);
-		error = reiserfs_xattr_set(inode, name, value, size, 0);
-	} else {
-		error = reiserfs_xattr_del(inode, name);
-		if (error == -ENODATA) {
-			/* This may seem odd here, but it means that the ACL was set
-			 * with a value representable with mode bits. If there was
-			 * an ACL before, reiserfs_xattr_del already dirtied the inode.
-			 */
+	}
+
+	error = reiserfs_xattr_set_handle(th, inode, name, value, size, 0);
+
+	/*
+	 * Ensure that the inode gets dirtied if we're only using
+	 * the mode bits and an old ACL didn't exist. We don't need
+	 * to check if the inode is hashed here since we won't get
+	 * called by reiserfs_inherit_default_acl().
+	 */
+	if (error == -ENODATA) {
+		error = 0;
+		if (type == ACL_TYPE_ACCESS) {
+			inode->i_ctime = CURRENT_TIME_SEC;
 			mark_inode_dirty(inode);
-			error = 0;
 		}
 	}
 
 	kfree(value);
 
-	if (!error) {
-		/* Release the old one */
-		if (!IS_ERR(*p_acl) && *p_acl)
-			posix_acl_release(*p_acl);
-
-		if (acl == NULL)
-			*p_acl = ERR_PTR(-ENODATA);
-		else
-			*p_acl = posix_acl_dup(acl);
-	}
+	if (!error)
+		set_cached_acl(inode, type, acl);
 
 	return error;
 }
 
-/* dir->i_mutex: locked,
- * inode is new and not released into the wild yet */
+/*
+ * dir->i_mutex: locked,
+ * inode is new and not released into the wild yet
+ */
 int
-reiserfs_inherit_default_acl(struct inode *dir, struct dentry *dentry,
+reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th,
+			     struct inode *dir, struct dentry *dentry,
 			     struct inode *inode)
 {
-	struct posix_acl *acl;
+	struct posix_acl *default_acl, *acl;
 	int err = 0;
 
 	/* ACLs only get applied to files and directories */
 	if (S_ISLNK(inode->i_mode))
 		return 0;
 
-	/* ACLs can only be used on "new" objects, so if it's an old object
-	 * there is nothing to inherit from */
+	/*
+	 * ACLs can only be used on "new" objects, so if it's an old object
+	 * there is nothing to inherit from
+	 */
 	if (get_inode_sd_version(dir) == STAT_DATA_V1)
 		goto apply_umask;
 
-	/* Don't apply ACLs to objects in the .reiserfs_priv tree.. This
+	/*
+	 * Don't apply ACLs to objects in the .reiserfs_priv tree.. This
 	 * would be useless since permissions are ignored, and a pain because
-	 * it introduces locking cycles */
-	if (is_reiserfs_priv_object(dir)) {
-		reiserfs_mark_inode_private(inode);
+	 * it introduces locking cycles
+	 */
+	if (IS_PRIVATE(dir)) {
+		inode->i_flags |= S_PRIVATE;
 		goto apply_umask;
 	}
 
-	acl = reiserfs_get_acl(dir, ACL_TYPE_DEFAULT);
-	if (IS_ERR(acl)) {
-		if (PTR_ERR(acl) == -ENODATA)
-			goto apply_umask;
-		return PTR_ERR(acl);
-	}
+	err = posix_acl_create(dir, &inode->i_mode, &default_acl, &acl);
+	if (err)
+		return err;
 
+	if (default_acl) {
+		err = __reiserfs_set_acl(th, inode, ACL_TYPE_DEFAULT,
+					 default_acl);
+		posix_acl_release(default_acl);
+	}
 	if (acl) {
-		struct posix_acl *acl_copy;
-		mode_t mode = inode->i_mode;
-		int need_acl;
-
-		/* Copy the default ACL to the default ACL of a new directory */
-		if (S_ISDIR(inode->i_mode)) {
-			err = reiserfs_set_acl(inode, ACL_TYPE_DEFAULT, acl);
-			if (err)
-				goto cleanup;
-		}
-
-		/* Now we reconcile the new ACL and the mode,
-		   potentially modifying both */
-		acl_copy = posix_acl_clone(acl, GFP_NOFS);
-		if (!acl_copy) {
-			err = -ENOMEM;
-			goto cleanup;
-		}
-
-		need_acl = posix_acl_create_masq(acl_copy, &mode);
-		if (need_acl >= 0) {
-			if (mode != inode->i_mode) {
-				inode->i_mode = mode;
-			}
-
-			/* If we need an ACL.. */
-			if (need_acl > 0) {
-				err =
-				    reiserfs_set_acl(inode, ACL_TYPE_ACCESS,
-						     acl_copy);
-				if (err)
-					goto cleanup_copy;
-			}
-		}
-	      cleanup_copy:
-		posix_acl_release(acl_copy);
-	      cleanup:
+		if (!err)
+			err = __reiserfs_set_acl(th, inode, ACL_TYPE_ACCESS,
+						 acl);
 		posix_acl_release(acl);
-	} else {
-	      apply_umask:
-		/* no ACL, apply umask */
-		inode->i_mode &= ~current->fs->umask;
 	}
 
 	return err;
-}
-
-/* Looks up and caches the result of the default ACL.
- * We do this so that we don't need to carry the xattr_sem into
- * reiserfs_new_inode if we don't need to */
-int reiserfs_cache_default_acl(struct inode *inode)
-{
-	int ret = 0;
-	if (reiserfs_posixacl(inode->i_sb) && !is_reiserfs_priv_object(inode)) {
-		struct posix_acl *acl;
-		reiserfs_read_lock_xattr_i(inode);
-		reiserfs_read_lock_xattrs(inode->i_sb);
-		acl = reiserfs_get_acl(inode, ACL_TYPE_DEFAULT);
-		reiserfs_read_unlock_xattrs(inode->i_sb);
-		reiserfs_read_unlock_xattr_i(inode);
-		ret = (acl && !IS_ERR(acl));
-		if (ret)
-			posix_acl_release(acl);
-	}
 
-	return ret;
-}
-
-int reiserfs_acl_chmod(struct inode *inode)
-{
-	struct posix_acl *acl, *clone;
-	int error;
-
-	if (S_ISLNK(inode->i_mode))
-		return -EOPNOTSUPP;
-
-	if (get_inode_sd_version(inode) == STAT_DATA_V1 ||
-	    !reiserfs_posixacl(inode->i_sb)) {
-		return 0;
-	}
-
-	reiserfs_read_lock_xattrs(inode->i_sb);
-	acl = reiserfs_get_acl(inode, ACL_TYPE_ACCESS);
-	reiserfs_read_unlock_xattrs(inode->i_sb);
-	if (!acl)
-		return 0;
-	if (IS_ERR(acl))
-		return PTR_ERR(acl);
-	clone = posix_acl_clone(acl, GFP_NOFS);
-	posix_acl_release(acl);
-	if (!clone)
-		return -ENOMEM;
-	error = posix_acl_chmod_masq(clone, inode->i_mode);
-	if (!error) {
-		int lock = !has_xattr_dir(inode);
-		reiserfs_write_lock_xattr_i(inode);
-		if (lock)
-			reiserfs_write_lock_xattrs(inode->i_sb);
-		else
-			reiserfs_read_lock_xattrs(inode->i_sb);
-		error = reiserfs_set_acl(inode, ACL_TYPE_ACCESS, clone);
-		if (lock)
-			reiserfs_write_unlock_xattrs(inode->i_sb);
-		else
-			reiserfs_read_unlock_xattrs(inode->i_sb);
-		reiserfs_write_unlock_xattr_i(inode);
-	}
-	posix_acl_release(clone);
-	return error;
-}
-
-static int
-posix_acl_access_get(struct inode *inode, const char *name,
-		     void *buffer, size_t size)
-{
-	if (strlen(name) != sizeof(POSIX_ACL_XATTR_ACCESS) - 1)
-		return -EINVAL;
-	return xattr_get_acl(inode, ACL_TYPE_ACCESS, buffer, size);
-}
-
-static int
-posix_acl_access_set(struct inode *inode, const char *name,
-		     const void *value, size_t size, int flags)
-{
-	if (strlen(name) != sizeof(POSIX_ACL_XATTR_ACCESS) - 1)
-		return -EINVAL;
-	return xattr_set_acl(inode, ACL_TYPE_ACCESS, value, size);
+apply_umask:
+	/* no ACL, apply umask */
+	inode->i_mode &= ~current_umask();
+	return err;
 }
 
-static int posix_acl_access_del(struct inode *inode, const char *name)
+/* This is used to cache the default acl before a new object is created.
+ * The biggest reason for this is to get an idea of how many blocks will
+ * actually be required for the create operation if we must inherit an ACL.
+ * An ACL write can add up to 3 object creations and an additional file write
+ * so we'd prefer not to reserve that many blocks in the journal if we can.
+ * It also has the advantage of not loading the ACL with a transaction open,
+ * this may seem silly, but if the owner of the directory is doing the
+ * creation, the ACL may not be loaded since the permissions wouldn't require
+ * it.
+ * We return the number of blocks required for the transaction.
+ */
+int reiserfs_cache_default_acl(struct inode *inode)
 {
-	struct reiserfs_inode_info *reiserfs_i = REISERFS_I(inode);
-	struct posix_acl **acl = &reiserfs_i->i_acl_access;
-	if (strlen(name) != sizeof(POSIX_ACL_XATTR_ACCESS) - 1)
-		return -EINVAL;
-	if (!IS_ERR(*acl) && *acl) {
-		posix_acl_release(*acl);
-		*acl = ERR_PTR(-ENODATA);
-	}
-
-	return 0;
-}
+	struct posix_acl *acl;
+	int nblocks = 0;
 
-static int
-posix_acl_access_list(struct inode *inode, const char *name, int namelen,
-		      char *out)
-{
-	int len = namelen;
-	if (!reiserfs_posixacl(inode->i_sb))
+	if (IS_PRIVATE(inode))
 		return 0;
-	if (out)
-		memcpy(out, name, len);
 
-	return len;
-}
+	acl = reiserfs_get_acl(inode, ACL_TYPE_DEFAULT);
 
-struct reiserfs_xattr_handler posix_acl_access_handler = {
-	.prefix = POSIX_ACL_XATTR_ACCESS,
-	.get = posix_acl_access_get,
-	.set = posix_acl_access_set,
-	.del = posix_acl_access_del,
-	.list = posix_acl_access_list,
-};
+	if (acl && !IS_ERR(acl)) {
+		int size = reiserfs_acl_size(acl->a_count);
 
-static int
-posix_acl_default_get(struct inode *inode, const char *name,
-		      void *buffer, size_t size)
-{
-	if (strlen(name) != sizeof(POSIX_ACL_XATTR_DEFAULT) - 1)
-		return -EINVAL;
-	return xattr_get_acl(inode, ACL_TYPE_DEFAULT, buffer, size);
-}
+		/* Other xattrs can be created during inode creation. We don't
+		 * want to claim too many blocks, so we check to see if we
+		 * we need to create the tree to the xattrs, and then we
+		 * just want two files. */
+		nblocks = reiserfs_xattr_jcreate_nblocks(inode);
+		nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
 
-static int
-posix_acl_default_set(struct inode *inode, const char *name,
-		      const void *value, size_t size, int flags)
-{
-	if (strlen(name) != sizeof(POSIX_ACL_XATTR_DEFAULT) - 1)
-		return -EINVAL;
-	return xattr_set_acl(inode, ACL_TYPE_DEFAULT, value, size);
-}
+		REISERFS_I(inode)->i_flags |= i_has_xattr_dir;
 
-static int posix_acl_default_del(struct inode *inode, const char *name)
-{
-	struct reiserfs_inode_info *reiserfs_i = REISERFS_I(inode);
-	struct posix_acl **acl = &reiserfs_i->i_acl_default;
-	if (strlen(name) != sizeof(POSIX_ACL_XATTR_DEFAULT) - 1)
-		return -EINVAL;
-	if (!IS_ERR(*acl) && *acl) {
-		posix_acl_release(*acl);
-		*acl = ERR_PTR(-ENODATA);
+		/* We need to account for writes + bitmaps for two files */
+		nblocks += reiserfs_xattr_nblocks(inode, size) * 4;
+		posix_acl_release(acl);
 	}
 
-	return 0;
+	return nblocks;
 }
 
-static int
-posix_acl_default_list(struct inode *inode, const char *name, int namelen,
-		       char *out)
+/*
+ * Called under i_mutex
+ */
+int reiserfs_acl_chmod(struct inode *inode)
 {
-	int len = namelen;
-	if (!reiserfs_posixacl(inode->i_sb))
+	if (IS_PRIVATE(inode))
+		return 0;
+	if (get_inode_sd_version(inode) == STAT_DATA_V1 ||
+	    !reiserfs_posixacl(inode->i_sb))
 		return 0;
-	if (out)
-		memcpy(out, name, len);
 
-	return len;
+	return posix_acl_chmod(inode, inode->i_mode);
 }
-
-struct reiserfs_xattr_handler posix_acl_default_handler = {
-	.prefix = POSIX_ACL_XATTR_DEFAULT,
-	.get = posix_acl_default_get,
-	.set = posix_acl_default_set,
-	.del = posix_acl_default_del,
-	.list = posix_acl_default_list,
-};