MD: Remember the last sync operation that was performed

MD:  Remember the last sync operation that was performed

This patch adds a field to the mddev structure to track the last
sync operation that was performed.  This is especially useful when
it comes to what is recorded in mismatch_cnt in sysfs.  If the
last operation was "data-check", then it reports the number of
descrepancies found by the user-initiated check.  If it was a
"repair" operation, then it is reporting the number of
descrepancies repaired.  etc.

Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c
index 21e8e4660c59..4880b69e2e9e 100644
--- a/drivers/md/dm-raid.c
+++ b/drivers/md/dm-raid.c
@@ -1388,6 +1388,7 @@ static void raid_status(struct dm_target *ti, status_type_t type,
                  *   performing a "check" of the array.
                  */
                 DMEMIT(" %llu",
+                       (strcmp(rs->md.last_sync_action, "check")) ? 0 :
                        (unsigned long long)
                        atomic64_read(&rs->md.resync_mismatches));
                 break;
@@ -1651,7 +1652,7 @@ static void raid_resume(struct dm_target *ti)
 
 static struct target_type raid_target = {
         .name = "raid",
-        .version = {1, 5, 1},
+        .version = {1, 5, 2},
         .module = THIS_MODULE,
         .ctr = raid_ctr,
         .dtr = raid_dtr,