[PATCH] quota: consolidate code surrounding vfs_quota_on_mount

Move some code duplicated in both callers into vfs_quota_on_mount

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Jan Kara <jack@ucw.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 19 insertions, 4 deletions

diff --git a/fs/dquot.c b/fs/dquot.c
index 3995ce7907cc..343c03655619 100644
--- a/fs/dquot.c
+++ b/fs/dquot.c
@@ -1519,14 +1519,29 @@ out_path:
  * This function is used when filesystem needs to initialize quotas
  * during mount time.
  */
-int vfs_quota_on_mount(int type, int format_id, struct dentry *dentry)
+int vfs_quota_on_mount(struct super_block *sb, char *qf_name,
+                int format_id, int type)
 {
+        struct qstr name = {.name = qf_name, .len = 0, .len = strlen(qf_name)};
+        struct dentry *dentry;
         int error;
 
+        dentry = lookup_hash(&name, sb->s_root);
+        if (IS_ERR(dentry))
+                return PTR_ERR(dentry);
+
         error = security_quota_on(dentry);
-        if (error)
-                return error;
-        return vfs_quota_on_inode(dentry->d_inode, type, format_id);
+        if (!error)
+                error = vfs_quota_on_inode(dentry->d_inode, type, format_id);
+
+        /*
+         * Now invalidate and put the dentry - quota got its own reference
+         * to inode and dentry has at least wrong hash so we had better
+         * throw it away.
+         */
+        d_invalidate(dentry);
+        dput(dentry);
+        return error;
 }
 
 /* Generic routine for getting common part of quota structure */