[dm-devel] [PATCH 1 of 1] dm log userspace check additional error conditions

[Jonathan Brassow]

Patch name: dm-log-userspace-check-additional-error-conditions.patch

This patch resolves unhandled errors.

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

Signed-off-by: Jonathan Brassow <jbrassow at redhat.com>

Index: linux-2.6/drivers/md/dm-log-userspace-base.c
===================================================================
--- linux-2.6.orig/drivers/md/dm-log-userspace-base.c
+++ linux-2.6/drivers/md/dm-log-userspace-base.c
@@ -181,8 +181,11 @@ static int userspace_ctr(struct dm_dirty
 	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;
 	}