[dm-devel] [RFC PATCH] dm-multipath: Print more explicit warnings when dealing with multipath messages

[Jose Castillo]

The following warning message "Unrecognised multipath message received" is displayed
in two different situations inside the function multipath_message: when
the number of arguments passed is invalid and when the string passed in argv[0]
is not recognized. With this patch, both warnings are more specific to each case
and is easier to identify where the problem is.

Signed-off-by: Jose Castillo <jcastillo at redhat.com>
---
 drivers/md/dm-mpath.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index 6eb9dc9..95c4044 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -1552,7 +1552,7 @@ static int multipath_message(struct dm_target *ti, unsigned argc, char **argv)
 	}
 
 	if (argc != 2) {
-		DMWARN("Unrecognised multipath message received.");
+		DMWARN("Invalid multipath message arguments. Expected 2 arguments, got %d.", argc);
 		goto out;
 	}
 
@@ -1570,7 +1570,7 @@ static int multipath_message(struct dm_target *ti, unsigned argc, char **argv)
 	else if (!strcasecmp(argv[0], "fail_path"))
 		action = fail_path;
 	else {
-		DMWARN("Unrecognised multipath message received.");
+		DMWARN("Unrecognised multipath message received: %s", argv[0]);
 		goto out;
 	}
 
-- 
1.8.4.2