[PATCH v2 1/4] dm log userspace: trap all errors from failed log construction

[Mike Snitzer <snitzer@redhat.com>]

From: Jonathan Brassow <jbrassow@redhat.com>

When constructing a mirror log, it is possible for the initial request
to fail for other reasons besides -ESRCH.  These must be handled too.

Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
---
 drivers/md/dm-log-userspace-base.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/md/dm-log-userspace-base.c b/drivers/md/dm-log-userspace-base.c
index 1ed0094..ae7aa4b 100644
--- a/drivers/md/dm-log-userspace-base.c
+++ b/drivers/md/dm-log-userspace-base.c
@@ -181,8 +181,11 @@ static int userspace_ctr(struct dm_dirty_log *log, struct dm_target *ti,
 	r = dm_consult_userspace(lc->uuid, lc->luid, DM_ULOG_CTR,
 				 ctr_str, str_size, NULL, NULL);
 
-	if (r == -ESRCH) {
-		DMERR("Userspace log server not found");
+	if (r < 0) {
+		if (r == -ESRCH)
+			DMERR("Userspace log server not found");
+		else
+			DMERR("Userspace log server failed to create log");
 		goto out;
 	}
 
-- 
1.7.2.3