[PATCH 2/2] ext4: add quota's error handling callback

[Dmitry Monakhov <dmonakhov@openvz.org>]

quota is another type of metadata and quota inconsistency must
being handled properly.

Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
---
 fs/ext4/super.c |   11 +++++++++--
 1 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index edcf3b0..9113c16 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -999,6 +999,12 @@ static int bdev_try_to_free_page(struct super_block *sb, struct page *page,
 #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group")
 #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA))
 
+void ext4_handle_quota_error(struct super_block *sb, int type)
+{
+	ext4_error(sb, __func__, "Disk quota type:%s probably inconsistent.",
+		QTYPE2NAME(type));
+}
+
 static int ext4_write_dquot(struct dquot *dquot);
 static int ext4_acquire_dquot(struct dquot *dquot);
 static int ext4_release_dquot(struct dquot *dquot);
@@ -1023,6 +1029,7 @@ static const struct dquot_operations ext4_quota_operations = {
 	.write_info	= ext4_write_info,
 	.alloc_dquot	= dquot_alloc,
 	.destroy_dquot	= dquot_destroy,
+	.notify_error	= ext4_handle_quota_error,
 };
 
 static const struct quotactl_ops ext4_qctl_operations = {
@@ -1032,7 +1039,7 @@ static const struct quotactl_ops ext4_qctl_operations = {
 	.get_info	= vfs_get_dqinfo,
 	.set_info	= vfs_set_dqinfo,
 	.get_dqblk	= vfs_get_dqblk,
-	.set_dqblk	= vfs_set_dqblk
+	.set_dqblk	= vfs_set_dqblk,
 };
 #endif
 
@@ -3915,7 +3922,7 @@ static ssize_t ext4_quota_write(struct super_block *sb, int type,
 	handle_t *handle = journal_current_handle();
 
 	if (EXT4_SB(sb)->s_journal && !handle) {
-		ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)"
+		ext4_error(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)"
 			" cancelled because transaction is not started",
 			(unsigned long long)off, (unsigned long long)len);
 		return -EIO;
-- 
1.6.6.1