JFS: allow extended attributes to be set within a existing transaction

Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>

1 files changed, 41 insertions, 17 deletions

diff --git a/fs/jfs/xattr.c b/fs/jfs/xattr.c
index 554ec73..35674b2 100644
--- a/fs/jfs/xattr.c
+++ b/fs/jfs/xattr.c
@@ -633,12 +633,12 @@ static void ea_release(struct inode *inode, struct ea_buffer *ea_buf)
 	}
 }
 
-static int ea_put(struct inode *inode, struct ea_buffer *ea_buf, int new_size)
+static int ea_put(tid_t tid, struct inode *inode, struct ea_buffer *ea_buf,
+		  int new_size)
 {
 	struct jfs_inode_info *ji = JFS_IP(inode);
 	unsigned long old_blocks, new_blocks;
 	int rc = 0;
-	tid_t tid;
 
 	if (new_size == 0) {
 		ea_release(inode, ea_buf);
@@ -664,9 +664,6 @@ static int ea_put(struct inode *inode, struct ea_buffer *ea_buf, int new_size)
 	if (rc)
 		return rc;
 
-	tid = txBegin(inode->i_sb, 0);
-	down(&ji->commit_sem);
-
 	old_blocks = new_blocks = 0;
 
 	if (ji->ea.flag & DXD_EXTENT) {
@@ -695,11 +692,8 @@ static int ea_put(struct inode *inode, struct ea_buffer *ea_buf, int new_size)
 		DQUOT_FREE_BLOCK(inode, old_blocks);
 
 	inode->i_ctime = CURRENT_TIME;
-	rc = txCommit(tid, 1, &inode, 0);
-	txEnd(tid);
-	up(&ji->commit_sem);
 
-	return rc;
+	return 0;
 }
 
 /*
@@ -810,8 +804,8 @@ static int can_set_xattr(struct inode *inode, const char *name,
 	return permission(inode, MAY_WRITE, NULL);
 }
 
-int __jfs_setxattr(struct inode *inode, const char *name, const void *value,
-		   size_t value_len, int flags)
+int __jfs_setxattr(tid_t tid, struct inode *inode, const char *name,
+		   const void *value, size_t value_len, int flags)
 {
 	struct jfs_ea_list *ealist;
 	struct jfs_ea *ea, *old_ea = NULL, *next_ea = NULL;
@@ -825,9 +819,6 @@ int __jfs_setxattr(struct inode *inode, const char *name, const void *value,
 	int rc;
 	int length;
 
-	if ((rc = can_set_xattr(inode, name, value, value_len)))
-		return rc;
-
 	if (strncmp(name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN) == 0) {
 		os2name = kmalloc(namelen - XATTR_OS2_PREFIX_LEN + 1,
 				  GFP_KERNEL);
@@ -939,7 +930,7 @@ int __jfs_setxattr(struct inode *inode, const char *name, const void *value,
 
 	ealist->size = cpu_to_le32(new_size);
 
-	rc = ea_put(inode, &ea_buf, new_size);
+	rc = ea_put(tid, inode, &ea_buf, new_size);
 
 	goto out;
       release:
@@ -955,12 +946,29 @@ int __jfs_setxattr(struct inode *inode, const char *name, const void *value,
 int jfs_setxattr(struct dentry *dentry, const char *name, const void *value,
 		 size_t value_len, int flags)
 {
+	struct inode *inode = dentry->d_inode;
+	struct jfs_inode_info *ji = JFS_IP(inode);
+	int rc;
+	tid_t tid;
+
+	if ((rc = can_set_xattr(inode, name, value, value_len)))
+		return rc;
+
 	if (value == NULL) {	/* empty EA, do not remove */
 		value = "";
 		value_len = 0;
 	}
 
-	return __jfs_setxattr(dentry->d_inode, name, value, value_len, flags);
+	tid = txBegin(inode->i_sb, 0);
+	down(&ji->commit_sem);
+	rc = __jfs_setxattr(tid, dentry->d_inode, name, value, value_len,
+			    flags);
+	if (!rc)
+		rc = txCommit(tid, 1, &inode, 0);
+	txEnd(tid);
+	up(&ji->commit_sem);
+
+	return rc;
 }
 
 static int can_get_xattr(struct inode *inode, const char *name)
@@ -1122,5 +1130,21 @@ ssize_t jfs_listxattr(struct dentry * dentry, char *data, size_t buf_size)
 
 int jfs_removexattr(struct dentry *dentry, const char *name)
 {
-	return __jfs_setxattr(dentry->d_inode, name, NULL, 0, XATTR_REPLACE);
+	struct inode *inode = dentry->d_inode;
+	struct jfs_inode_info *ji = JFS_IP(inode);
+	int rc;
+	tid_t tid;
+
+	if ((rc = can_set_xattr(inode, name, NULL, 0)))
+		return rc;
+
+	tid = txBegin(inode->i_sb, 0);
+	down(&ji->commit_sem);
+	rc = __jfs_setxattr(tid, dentry->d_inode, name, NULL, 0, XATTR_REPLACE);
+	if (!rc)
+		rc = txCommit(tid, 1, &inode, 0);
+	txEnd(tid);
+	up(&ji->commit_sem);
+
+	return rc;
 }