dm mpath: print more useful warnings in multipath_message()

The warning message "Unrecognised multipath message received" is
displayed in two different situations in multipath_message(): when the
number of arguments passed is invalid and when the string passed in
argv[0] is not recognized.

Make it easier to identify where the problem is by making these warnings
more specific with additional context for each case.

Signed-off-by: Jose Castillo <jcastillo@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index b1fb01efd56c..aa009e865871 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -1478,7 +1478,7 @@ 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;
         }
 
@@ -1496,7 +1496,7 @@ 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;
         }