[PATCH] md: count corrected read errors per drive

Store this total in superblock (As appropriate), and make it available to
userspace via sysfs.

Signed-off-by: Neil Brown <neilb@suse.de>
Acked-by: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 181c9616d5f1..a06ff91f27e2 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -1265,6 +1265,7 @@ static void sync_request_write(mddev_t *mddev, r1bio_t *r1_bio)
                                         if (r1_bio->bios[d]->bi_end_io != end_sync_read)
                                                 continue;
                                         rdev = conf->mirrors[d].rdev;
+                                        atomic_add(s, &rdev->corrected_errors);
                                         if (sync_page_io(rdev->bdev,
                                                          sect + rdev->data_offset,
                                                          s<<9,
@@ -1463,6 +1464,7 @@ static void raid1d(mddev_t *mddev)
                                                         d = conf->raid_disks;
                                                 d--;
                                                 rdev = conf->mirrors[d].rdev;
+                                                atomic_add(s, &rdev->corrected_errors);
                                                 if (rdev &&
                                                     test_bit(In_sync, &rdev->flags)) {
                                                         if (sync_page_io(rdev->bdev,