[PATCH] md: support check-without-repair of raid10 arrays

Also keep count on the number of errors found.

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/raid10.c b/drivers/md/raid10.c
index 8f58a44..1fa70c3 100644 (file)
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -1206,6 +1206,10 @@ static void sync_request_write(mddev_t *mddev, r10bio_t *r10_bio)
                                break;
                if (j == vcnt)
                        continue;
+               mddev->resync_mismatches += r10_bio->sectors;
+               if (test_bit(MD_RECOVERY_CHECK, &mddev->recovery))
+                       /* Don't fix anything. */
+                       continue;
                /* Ok, we need to write this bio
                 * First we need to fixup bv_offset, bv_len and
                 * bi_vecs, as the read request might have corrupted these