diff options
Diffstat (limited to 'drivers/md/dm-raid.c')
| -rw-r--r-- | drivers/md/dm-raid.c | 44 |
1 files changed, 43 insertions, 1 deletions
diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c index 1d3fe1a40a9b..facaf9142d5a 100644 --- a/drivers/md/dm-raid.c +++ b/drivers/md/dm-raid.c @@ -1574,12 +1574,54 @@ static void raid_postsuspend(struct dm_target *ti) static void raid_resume(struct dm_target *ti) { + int i; + uint64_t failed_devices, cleared_failed_devices = 0; + unsigned long flags; + struct dm_raid_superblock *sb; struct raid_set *rs = ti->private; + struct md_rdev *r; set_bit(MD_CHANGE_DEVS, &rs->md.flags); if (!rs->bitmap_loaded) { bitmap_load(&rs->md); rs->bitmap_loaded = 1; + } else { + /* + * A secondary resume while the device is active. + * Take this opportunity to check whether any failed + * devices are reachable again. + */ + for (i = 0; i < rs->md.raid_disks; i++) { + r = &rs->dev[i].rdev; + if (test_bit(Faulty, &r->flags) && r->sb_page && + sync_page_io(r, 0, r->sb_size, + r->sb_page, READ, 1)) { + DMINFO("Faulty device #%d has readable super" + "block. Attempting to revive it.", i); + r->raid_disk = i; + r->saved_raid_disk = i; + flags = r->flags; + clear_bit(Faulty, &r->flags); + clear_bit(WriteErrorSeen, &r->flags); + clear_bit(In_sync, &r->flags); + if (r->mddev->pers->hot_add_disk(r->mddev, r)) { + r->raid_disk = -1; + r->saved_raid_disk = -1; + r->flags = flags; + } else { + r->recovery_offset = 0; + cleared_failed_devices |= 1 << i; + } + } + } + if (cleared_failed_devices) { + rdev_for_each(r, &rs->md) { + sb = page_address(r->sb_page); + failed_devices = le64_to_cpu(sb->failed_devices); + failed_devices &= ~cleared_failed_devices; + sb->failed_devices = cpu_to_le64(failed_devices); + } + } } clear_bit(MD_RECOVERY_FROZEN, &rs->md.recovery); @@ -1588,7 +1630,7 @@ static void raid_resume(struct dm_target *ti) static struct target_type raid_target = { .name = "raid", - .version = {1, 5, 0}, + .version = {1, 5, 1}, .module = THIS_MODULE, .ctr = raid_ctr, .dtr = raid_dtr, |