quota: move unmount handling into the filesystem

Currently the VFS calls into the quotactl interface for unmounting
filesystems.  This means filesystems with their own quota handling
can't easily distinguish between user-space originating quotaoff
and an unount.  Instead move the responsibily of the unmount handling
into the filesystem to be consistent with all other dquot handling.

Note that we do call dquot_disable a lot later now, e.g. after
a sync_filesystem.  But this is fine as the quota code does all its
writes via blockdev's mapping and that is synced even later.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>

9 files changed, 14 insertions, 16 deletions

diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 318ebc58bb7..b9b77c3e7ae 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -119,6 +119,8 @@ static void ext2_put_super (struct super_block * sb)
 	int i;
 	struct ext2_sb_info *sbi = EXT2_SB(sb);
 
+	dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
+
 	if (sb->s_dirt)
 		ext2_write_super(sb);
 
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 9d5e582b514..b2f3715988b 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -410,6 +410,8 @@ static void ext3_put_super (struct super_block * sb)
 	struct ext3_super_block *es = sbi->s_es;
 	int i, err;
 
+	dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
+
 	lock_kernel();
 
 	ext3_xattr_put_super(sb);
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 08d31101eb0..808aca3a22f 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -645,6 +645,8 @@ static void ext4_put_super(struct super_block *sb)
 	struct ext4_super_block *es = sbi->s_es;
 	int i, err;
 
+	dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
+
 	flush_workqueue(sbi->dio_unwritten_wq);
 	destroy_workqueue(sbi->dio_unwritten_wq);
 
diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index b8a07d4c108..7d940a3a3d9 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -179,6 +179,8 @@ static void jfs_put_super(struct super_block *sb)
 
 	jfs_info("In jfs_put_super");
 
+	dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
+
 	lock_kernel();
 
 	rc = jfs_umount(sb);
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index 5dad5a2707b..08879af0af0 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -466,6 +466,8 @@ static void reiserfs_put_super(struct super_block *s)
 	struct reiserfs_transaction_handle th;
 	th.t_trans_id = 0;
 
+	dquot_disable(s, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
+
 	reiserfs_write_lock(s);
 
 	if (s->s_dirt)
diff --git a/fs/super.c b/fs/super.c
index a38e6e9b6f6..05f62e5d464 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -160,7 +160,6 @@ void deactivate_locked_super(struct super_block *s)
 {
 	struct file_system_type *fs = s->s_type;
 	if (atomic_dec_and_test(&s->s_active)) {
-		vfs_dq_off(s, 0);
 		fs->kill_sb(s);
 		put_filesystem(fs);
 		put_super(s);
diff --git a/fs/udf/super.c b/fs/udf/super.c
index b154c41a7a9..76a61566f29 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -2102,6 +2102,8 @@ static void udf_put_super(struct super_block *sb)
 	int i;
 	struct udf_sb_info *sbi;
 
+	dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
+
 	sbi = UDF_SB(sb);
 
 	lock_kernel();
diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index 495fdc1df7e..d3977c7128e 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -1227,6 +1227,8 @@ static void ufs_put_super(struct super_block *sb)
 		
 	UFSD("ENTER\n");
 
+	dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
+
 	if (sb->s_dirt)
 		ufs_write_super(sb);
 
diff --git a/include/linux/quotaops.h b/include/linux/quotaops.h
index 811529241e3..cfa2abb1b6d 100644
--- a/include/linux/quotaops.h
+++ b/include/linux/quotaops.h
@@ -156,16 +156,6 @@ extern const struct quotactl_ops vfs_quotactl_ops;
 #define sb_dquot_ops (&dquot_operations)
 #define sb_quotactl_ops (&vfs_quotactl_ops)
 
-/* Cannot be called inside a transaction */
-static inline int vfs_dq_off(struct super_block *sb, int remount)
-{
-	int ret = -ENOSYS;
-
-	if (sb->s_qcop && sb->s_qcop->quota_off)
-		ret = sb->s_qcop->quota_off(sb, -1, remount);
-	return ret;
-}
-
 #else
 
 static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type)
@@ -232,11 +222,6 @@ static inline void dquot_free_inode(const struct inode *inode)
 {
 }
 
-static inline int vfs_dq_off(struct super_block *sb, int remount)
-{
-	return 0;
-}
-
 static inline int dquot_transfer(struct inode *inode, struct iattr *iattr)
 {
 	return 0;