[PATCH] md: make manual repair work for raid1

Raid1 currently optimises resync using the intent bitmap etc.  This
optimisation is not wanted when we explicitly request a repair through sysfs,
so add appropriate checks.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 1cbf51f..2da9d3b 100644 (file)
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -1310,7 +1310,7 @@ static sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *skipped, i
         * This call the bitmap_start_sync doesn't actually record anything
         */
        if (!bitmap_start_sync(mddev->bitmap, sector_nr, &sync_blocks, 1) &&
-           !conf->fullsync) {
+           !conf->fullsync && !test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) {
                /* We can skip this block, and probably several more */
                *skipped = 1;
                return sync_blocks;
@@ -1387,7 +1387,8 @@ static sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *skipped, i
                        still_degraded = 1;
                        continue;
                } else if (!test_bit(In_sync, &conf->mirrors[i].rdev->flags) ||
-                          sector_nr + RESYNC_SECTORS > mddev->recovery_cp) {
+                          sector_nr + RESYNC_SECTORS > mddev->recovery_cp   ||
+                          test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) {
                        bio->bi_rw = WRITE;
                        bio->bi_end_io = end_sync_write;
                        write_targets ++;
@@ -1421,8 +1422,9 @@ static sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *skipped, i
                        break;
                if (sync_blocks == 0) {
                        if (!bitmap_start_sync(mddev->bitmap, sector_nr,
-                                       &sync_blocks, still_degraded) &&
-                                       !conf->fullsync)
+                                              &sync_blocks, still_degraded) &&
+                           !conf->fullsync &&
+                           !test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery))
                                break;
                        if (sync_blocks < (PAGE_SIZE>>9))
                                BUG();