quota: ext4: make ext4 handle quotaon on remount

Update ext4 to handle quotaon on remount RW.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 8 insertions, 7 deletions

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 13383ba18f1d..c81a8e759bad 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -813,7 +813,8 @@ static int ext4_acquire_dquot(struct dquot *dquot);
 static int ext4_release_dquot(struct dquot *dquot);
 static int ext4_mark_dquot_dirty(struct dquot *dquot);
 static int ext4_write_info(struct super_block *sb, int type);
-static int ext4_quota_on(struct super_block *sb, int type, int format_id, char *path);
+static int ext4_quota_on(struct super_block *sb, int type, int format_id,
+                                char *path, int remount);
 static int ext4_quota_on_mount(struct super_block *sb, int type);
 static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data,
                                size_t len, loff_t off);
@@ -1632,7 +1633,7 @@ static void ext4_orphan_cleanup (struct super_block * sb,
         /* Turn quotas off */
         for (i = 0; i < MAXQUOTAS; i++) {
                 if (sb_dqopt(sb)->files[i])
-                        vfs_quota_off(sb, i);
+                        vfs_quota_off(sb, i, 0);
         }
 #endif
         sb->s_flags = s_flags; /* Restore MS_RDONLY status */
@@ -3143,7 +3144,7 @@ static int ext4_quota_on_mount(struct super_block *sb, int type)
  * Standard function to be called on quota_on
  */
 static int ext4_quota_on(struct super_block *sb, int type, int format_id,
-                         char *path)
+                         char *path, int remount)
 {
         int err;
         struct nameidata nd;
@@ -3151,9 +3152,9 @@ static int ext4_quota_on(struct super_block *sb, int type, int format_id,
         if (!test_opt(sb, QUOTA))
                 return -EINVAL;
         /* Not journalling quota? */
-        if (!EXT4_SB(sb)->s_qf_names[USRQUOTA] &&
-            !EXT4_SB(sb)->s_qf_names[GRPQUOTA])
-                return vfs_quota_on(sb, type, format_id, path);
+        if ((!EXT4_SB(sb)->s_qf_names[USRQUOTA] &&
+            !EXT4_SB(sb)->s_qf_names[GRPQUOTA]) || remount)
+                return vfs_quota_on(sb, type, format_id, path, remount);
         err = path_lookup(path, LOOKUP_FOLLOW, &nd);
         if (err)
                 return err;
@@ -3168,7 +3169,7 @@ static int ext4_quota_on(struct super_block *sb, int type, int format_id,
                         "EXT4-fs: Quota file not on filesystem root. "
                         "Journalled quota will not work.\n");
         path_put(&nd.path);
-        return vfs_quota_on(sb, type, format_id, path);
+        return vfs_quota_on(sb, type, format_id, path, remount);
 }
 
 /* Read data from quotafile - avoid pagecache and such because we cannot afford