From a5bd968aeb87af4a3a96ecdd78912832997e8a9d Mon Sep 17 00:00:00 2001
From: Mike Snitzer <snitzer@redhat.com>
Date: Fri, 21 Dec 2012 20:23:34 +0000
Subject: [PATCH] dm block manager: reinstate message when validator fails
Reinstate a useful error message when the block manager buffer validator fails.
This was mistakenly eliminated when the block manager was converted to use
dm-bufio.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
---
drivers/md/persistent-data/dm-block-manager.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/md/persistent-data/dm-block-manager.c b/drivers/md/persistent-data/dm-block-manager.c
index 5ba277768d991..47b683e67a7c5 100644
--- a/drivers/md/persistent-data/dm-block-manager.c
+++ b/drivers/md/persistent-data/dm-block-manager.c
@@ -428,8 +428,11 @@ static int dm_bm_validate_buffer(struct dm_block_manager *bm,
if (!v)
return 0;
r = v->check(v, (struct dm_block *) buf, dm_bufio_get_block_size(bm->bufio));
- if (unlikely(r))
+ if (unlikely(r)) {
+ DMERR("%s validator check failed for block %llu", v->name,
+ (unsigned long long) dm_bufio_get_block_number(buf));
return r;
+ }
aux->validator = v;
} else {
if (unlikely(aux->validator != v)) {
--
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