diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/md/dm-raid.c | 87 |
1 files changed, 38 insertions, 49 deletions
diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c index b8f978e551d7..b40a088a2d92 100644 --- a/drivers/md/dm-raid.c +++ b/drivers/md/dm-raid.c @@ -2253,7 +2253,7 @@ static int super_validate(struct raid_set *rs, struct md_rdev *rdev) struct mddev *mddev = &rs->md; struct dm_raid_superblock *sb; - if (rs_is_raid0(rs) || !rdev->sb_page) + if (rs_is_raid0(rs) || !rdev->sb_page || rdev->raid_disk < 0) return 0; sb = page_address(rdev->sb_page); @@ -2316,21 +2316,19 @@ static int super_validate(struct raid_set *rs, struct md_rdev *rdev) static int analyse_superblocks(struct dm_target *ti, struct raid_set *rs) { int r; - struct raid_dev *dev; - struct md_rdev *rdev, *tmp, *freshest; + struct md_rdev *rdev, *freshest; struct mddev *mddev = &rs->md; freshest = NULL; - rdev_for_each_safe(rdev, tmp, mddev) { + rdev_for_each(rdev, mddev) { /* * Skipping super_load due to CTR_FLAG_SYNC will cause * the array to undergo initialization again as * though it were new. This is the intended effect * of the "sync" directive. * - * When reshaping capability is added, we must ensure - * that the "sync" directive is disallowed during the - * reshape. + * With reshaping capability added, we must ensure that + * that the "sync" directive is disallowed during the reshape. */ if (test_bit(__CTR_FLAG_SYNC, &rs->ctr_flags)) continue; @@ -2347,6 +2345,7 @@ static int analyse_superblocks(struct dm_target *ti, struct raid_set *rs) case 0: break; default: + /* This is a failure to read the superblock from the metadata device. */ /* * We have to keep any raid0 data/metadata device pairs or * the MD raid0 personality will fail to start the array. @@ -2354,33 +2353,17 @@ static int analyse_superblocks(struct dm_target *ti, struct raid_set *rs) if (rs_is_raid0(rs)) continue; - dev = container_of(rdev, struct raid_dev, rdev); - if (dev->meta_dev) - dm_put_device(ti, dev->meta_dev); - - dev->meta_dev = NULL; - rdev->meta_bdev = NULL; - - if (rdev->sb_page) - put_page(rdev->sb_page); - - rdev->sb_page = NULL; - - rdev->sb_loaded = 0; - /* - * We might be able to salvage the data device - * even though the meta device has failed. For - * now, we behave as though '- -' had been - * set for this device in the table. + * We keep the dm_devs to be able to emit the device tuple + * properly on the table line in raid_status() (rather than + * mistakenly acting as if '- -' got passed into the constructor). + * + * The rdev has to stay on the same_set list to allow for + * the attempt to restore faulty devices on second resume. */ - if (dev->data_dev) - dm_put_device(ti, dev->data_dev); - - dev->data_dev = NULL; - rdev->bdev = NULL; - - list_del(&rdev->same_set); + set_bit(Faulty, &rdev->flags); + rdev->raid_disk = rdev->saved_raid_disk = -1; + break; } } @@ -3078,10 +3061,13 @@ static const char *decipher_sync_action(struct mddev *mddev) * 'D' = Dead/Failed device * 'a' = Alive but not in-sync * 'A' = Alive and in-sync + * '-' = Non-existing device (i.e. uspace passed '- -' into the ctr) */ static const char *__raid_dev_status(struct md_rdev *rdev, bool array_in_sync) { - if (test_bit(Faulty, &rdev->flags)) + if (!rdev->bdev) + return "-"; + else if (test_bit(Faulty, &rdev->flags)) return "D"; else if (!array_in_sync || !test_bit(In_sync, &rdev->flags)) return "a"; @@ -3183,7 +3169,6 @@ static void raid_status(struct dm_target *ti, status_type_t type, sector_t progress, resync_max_sectors, resync_mismatches; const char *sync_action; struct raid_type *rt; - struct md_rdev *rdev; switch (type) { case STATUSTYPE_INFO: @@ -3204,9 +3189,9 @@ static void raid_status(struct dm_target *ti, status_type_t type, atomic64_read(&mddev->resync_mismatches) : 0; sync_action = decipher_sync_action(&rs->md); - /* HM FIXME: do we want another state char for raid0? It shows 'D' or 'A' now */ - rdev_for_each(rdev, mddev) - DMEMIT(__raid_dev_status(rdev, array_in_sync)); + /* HM FIXME: do we want another state char for raid0? It shows 'D'/'A'/'-' now */ + for (i = 0; i < rs->raid_disks; i++) + DMEMIT(__raid_dev_status(&rs->dev[i].rdev, array_in_sync)); /* * In-sync/Reshape ratio: @@ -3427,7 +3412,7 @@ static void attempt_restore_of_faulty_devices(struct raid_set *rs) memset(cleared_failed_devices, 0, sizeof(cleared_failed_devices)); - for (i = 0; i < rs->md.raid_disks; i++) { + for (i = 0; i < mddev->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, @@ -3445,22 +3430,26 @@ static void attempt_restore_of_faulty_devices(struct raid_set *rs) * '>= 0' - meaning we must call this function * ourselves. */ - if ((r->raid_disk >= 0) && - (mddev->pers->hot_remove_disk(mddev, r) != 0)) - /* Failed to revive this device, try next */ - continue; - - r->raid_disk = i; - r->saved_raid_disk = i; flags = r->flags; + clear_bit(In_sync, &r->flags); /* Mandatory for hot remove. */ + if (r->raid_disk >= 0) { + if (mddev->pers->hot_remove_disk(mddev, r)) { + /* Failed to revive this device, try next */ + r->flags = flags; + continue; + } + } else + r->raid_disk = r->saved_raid_disk = i; + clear_bit(Faulty, &r->flags); clear_bit(WriteErrorSeen, &r->flags); - clear_bit(In_sync, &r->flags); + if (mddev->pers->hot_add_disk(mddev, r)) { - r->raid_disk = -1; - r->saved_raid_disk = -1; + /* Failed to revive this device, try next */ + r->raid_disk = r->saved_raid_disk = -1; r->flags = flags; } else { + clear_bit(In_sync, &r->flags); r->recovery_offset = 0; set_bit(i, (void *) cleared_failed_devices); cleared = true; @@ -3651,7 +3640,7 @@ static void raid_resume(struct dm_target *ti) static struct target_type raid_target = { .name = "raid", - .version = {1, 9, 1}, + .version = {1, 9, 2}, .module = THIS_MODULE, .ctr = raid_ctr, .dtr = raid_dtr, |