[PATCH] dm: raid1: reset sync_search on resume

Reset sync_search on resume.  The effect is to retry syncing all out-of-sync
regions when a mirror is resumed, including ones that previously failed.

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

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/md/dm-log.c b/drivers/md/dm-log.c
index ce5c5d6fc10..6a926135184 100644
--- a/drivers/md/dm-log.c
+++ b/drivers/md/dm-log.c
@@ -466,6 +466,7 @@ static int disk_resume(struct dirty_log *log)
         /* copy clean across to sync */
         memcpy(lc->sync_bits, lc->clean_bits, size);
         lc->sync_count = count_bits32(lc->clean_bits, lc->bitset_uint32_count);
+        lc->sync_search = 0;
 
         /* set the correct number of regions in the header */
         lc->header.nr_regions = lc->region_count;
@@ -480,6 +481,13 @@ static uint32_t core_get_region_size(struct dirty_log *log)
         return lc->region_size;
 }
 
+static int core_resume(struct dirty_log *log)
+{
+        struct log_c *lc = (struct log_c *) log->context;
+        lc->sync_search = 0;
+        return 0;
+}
+
 static int core_is_clean(struct dirty_log *log, region_t region)
 {
         struct log_c *lc = (struct log_c *) log->context;
@@ -621,6 +629,7 @@ static struct dirty_log_type _core_type = {
         .module = THIS_MODULE,
         .ctr = core_ctr,
         .dtr = core_dtr,
+        .resume = core_resume,
         .get_region_size = core_get_region_size,
         .is_clean = core_is_clean,
         .in_sync = core_in_sync,