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>

diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index b1fb01e..aa009e8 100644 (file)
--- 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;
        }