dm log: report fault status

This patch reports the status of the log device so that userspace can detect
the error and take appropriate action.

Signed-off-by: Jonathan E Brassow <jbrassow@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/md/dm-log.c b/drivers/md/dm-log.c
index a503d12c2ff8..8d301409d814 100644
--- a/drivers/md/dm-log.c
+++ b/drivers/md/dm-log.c
@@ -615,6 +615,7 @@ static int core_status(struct dirty_log *log, status_type_t status,
 
         switch(status) {
         case STATUSTYPE_INFO:
+                DMEMIT("1 %s", log->type->name);
                 break;
 
         case STATUSTYPE_TABLE:
@@ -630,17 +631,17 @@ static int disk_status(struct dirty_log *log, status_type_t status,
                        char *result, unsigned int maxlen)
 {
         int sz = 0;
-        char buffer[16];
         struct log_c *lc = log->context;
 
         switch(status) {
         case STATUSTYPE_INFO:
+                DMEMIT("3 %s %s %c", log->type->name, lc->log_dev->name,
+                       lc->log_dev_failed ? 'D' : 'A');
                 break;
 
         case STATUSTYPE_TABLE:
-                format_dev_t(buffer, lc->log_dev->bdev->bd_dev);
                 DMEMIT("%s %u %s %u ", log->type->name,
-                       lc->sync == DEFAULTSYNC ? 2 : 3, buffer,
+                       lc->sync == DEFAULTSYNC ? 2 : 3, lc->log_dev->name,
                        lc->region_size);
                 DMEMIT_SYNC;
         }