From 1757128438d41670ded8bc3bc735325cc07dc8f9 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Sun, 10 Dec 2006 02:20:52 -0800 Subject: [PATCH] [PATCH] md: assorted md and raid1 one-liners Fix few bugs that meant that: - superblocks weren't alway written at exactly the right time (this could show up if the array was not written to - writting to the array causes lots of superblock updates and so hides these errors). - restarting device recovery after a clean shutdown (version-1 metadata only) didn't work as intended (or at all). 1/ Ensure superblock is updated when a new device is added. 2/ Remove an inappropriate test on MD_RECOVERY_SYNC in md_do_sync. The body of this if takes one of two branches depending on whether MD_RECOVERY_SYNC is set, so testing it in the clause of the if is wrong. 3/ Flag superblock for updating after a resync/recovery finishes. 4/ If we find the neeed to restart a recovery in the middle (version-1 metadata only) make sure a full recovery (not just as guided by bitmaps) does get done. Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/md/md.c | 3 ++- drivers/md/raid1.c | 1 + 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/md/md.c b/drivers/md/md.c index 763ecab3481..21e2a7b0884 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -3724,6 +3724,7 @@ static int add_new_disk(mddev_t * mddev, mdu_disk_info_t *info) if (err) export_rdev(rdev); + md_update_sb(mddev, 1); set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); md_wakeup_thread(mddev->thread); return err; @@ -5275,7 +5276,6 @@ void md_do_sync(mddev_t *mddev) mddev->pers->sync_request(mddev, max_sectors, &skipped, 1); if (!test_bit(MD_RECOVERY_ERR, &mddev->recovery) && - test_bit(MD_RECOVERY_SYNC, &mddev->recovery) && !test_bit(MD_RECOVERY_CHECK, &mddev->recovery) && mddev->curr_resync > 2) { if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { @@ -5299,6 +5299,7 @@ void md_do_sync(mddev_t *mddev) rdev->recovery_offset = mddev->curr_resync; } } + set_bit(MD_CHANGE_DEVS, &mddev->flags); skip: mddev->curr_resync = 0; diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index 656fae912fe..b3c5e12f081 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -1951,6 +1951,7 @@ static int run(mddev_t *mddev) !test_bit(In_sync, &disk->rdev->flags)) { disk->head_position = 0; mddev->degraded++; + conf->fullsync = 1; } } if (mddev->degraded == conf->raid_disks) { -- 2.20.1