diff options
| -rw-r--r-- | drivers/md/md.c | 101 |
1 files changed, 57 insertions, 44 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index 12cc28a..5f09678 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -2199,6 +2199,46 @@ static void sync_sbs(struct mddev *mddev, int nospares) } } +static bool does_sb_need_changing(struct mddev *mddev) +{ + struct md_rdev *rdev; + struct mdp_superblock_1 *sb; + int role; + + /* Find a good rdev */ + rdev_for_each(rdev, mddev) + if ((rdev->raid_disk >= 0) && !test_bit(Faulty, &rdev->flags)) + break; + + /* No good device found. */ + if (!rdev) + return false; + + sb = page_address(rdev->sb_page); + /* Check if a device has become faulty or a spare become active */ + rdev_for_each(rdev, mddev) { + role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); + /* Device activated? */ + if (role == 0xffff && rdev->raid_disk >=0 && + !test_bit(Faulty, &rdev->flags)) + return true; + /* Device turned faulty? */ + if (test_bit(Faulty, &rdev->flags) && (role < 0xfffd)) + return true; + } + + /* Check if any mddev parameters have changed */ + if ((mddev->dev_sectors != le64_to_cpu(sb->size)) || + (mddev->reshape_position != le64_to_cpu(sb->reshape_position)) || + (mddev->recovery_cp != le64_to_cpu(sb->resync_offset)) || + (mddev->layout != le64_to_cpu(sb->layout)) || + (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) || + (mddev->chunk_sectors != le32_to_cpu(sb->chunksize))) + return true; + + return false; +} + void md_update_sb(struct mddev *mddev, int force_change) { struct md_rdev *rdev; @@ -2211,6 +2251,18 @@ void md_update_sb(struct mddev *mddev, int force_change) set_bit(MD_CHANGE_DEVS, &mddev->flags); return; } + + if (mddev_is_clustered(mddev)) { + if (test_and_clear_bit(MD_CHANGE_DEVS, &mddev->flags)) + force_change = 1; + md_cluster_ops->metadata_update_start(mddev); + /* Has someone else has updated the sb */ + if (!does_sb_need_changing(mddev)) { + md_cluster_ops->metadata_update_cancel(mddev); + clear_bit(MD_CHANGE_PENDING, &mddev->flags); + return; + } + } repeat: /* First make sure individual recovery_offsets are correct */ rdev_for_each(rdev, mddev) { @@ -2359,6 +2411,9 @@ repeat: clear_bit(BlockedBadBlocks, &rdev->flags); wake_up(&rdev->blocked_wait); } + + if (mddev_is_clustered(mddev)) + md_cluster_ops->metadata_update_finish(mddev); } EXPORT_SYMBOL(md_update_sb); @@ -2496,13 +2551,9 @@ state_store(struct md_rdev *rdev, const char *buf, size_t len) if (mddev_is_clustered(mddev)) md_cluster_ops->remove_disk(mddev, rdev); md_kick_rdev_from_array(rdev); - if (mddev_is_clustered(mddev)) - md_cluster_ops->metadata_update_start(mddev); if (mddev->pers) md_update_sb(mddev, 1); md_new_event(mddev); - if (mddev_is_clustered(mddev)) - md_cluster_ops->metadata_update_finish(mddev); err = 0; } } else if (cmd_match(buf, "writemostly")) { @@ -4063,12 +4114,8 @@ size_store(struct mddev *mddev, const char *buf, size_t len) if (err) return err; if (mddev->pers) { - if (mddev_is_clustered(mddev)) - md_cluster_ops->metadata_update_start(mddev); err = update_size(mddev, sectors); md_update_sb(mddev, 1); - if (mddev_is_clustered(mddev)) - md_cluster_ops->metadata_update_finish(mddev); } else { if (mddev->dev_sectors == 0 || mddev->dev_sectors > sectors) @@ -5306,8 +5353,6 @@ static void md_clean(struct mddev *mddev) static void __md_stop_writes(struct mddev *mddev) { - if (mddev_is_clustered(mddev)) - md_cluster_ops->metadata_update_start(mddev); set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); flush_workqueue(md_misc_wq); if (mddev->sync_thread) { @@ -5326,8 +5371,6 @@ static void __md_stop_writes(struct mddev *mddev) mddev->in_sync = 1; md_update_sb(mddev, 1); } - if (mddev_is_clustered(mddev)) - md_cluster_ops->metadata_update_finish(mddev); } void md_stop_writes(struct mddev *mddev) @@ -6015,9 +6058,6 @@ kick_rdev: md_update_sb(mddev, 1); md_new_event(mddev); - if (mddev_is_clustered(mddev)) - md_cluster_ops->metadata_update_finish(mddev); - return 0; busy: if (mddev_is_clustered(mddev)) @@ -6073,14 +6113,12 @@ static int hot_add_disk(struct mddev *mddev, dev_t dev) goto abort_export; } - if (mddev_is_clustered(mddev)) - md_cluster_ops->metadata_update_start(mddev); clear_bit(In_sync, &rdev->flags); rdev->desc_nr = -1; rdev->saved_raid_disk = -1; err = bind_rdev_to_array(rdev, mddev); if (err) - goto abort_clustered; + goto abort_export; /* * The rest should better be atomic, we can have disk failures @@ -6090,9 +6128,6 @@ static int hot_add_disk(struct mddev *mddev, dev_t dev) rdev->raid_disk = -1; md_update_sb(mddev, 1); - - if (mddev_is_clustered(mddev)) - md_cluster_ops->metadata_update_finish(mddev); /* * Kick recovery, maybe this spare has to be added to the * array immediately. @@ -6102,9 +6137,6 @@ static int hot_add_disk(struct mddev *mddev, dev_t dev) md_new_event(mddev); return 0; -abort_clustered: - if (mddev_is_clustered(mddev)) - md_cluster_ops->metadata_update_cancel(mddev); abort_export: export_rdev(rdev); return err; @@ -6422,8 +6454,6 @@ static int update_array_info(struct mddev *mddev, mdu_array_info_t *info) return rv; } } - if (mddev_is_clustered(mddev)) - md_cluster_ops->metadata_update_start(mddev); if (info->size >= 0 && mddev->dev_sectors / 2 != info->size) rv = update_size(mddev, (sector_t)info->size * 2); @@ -6481,12 +6511,8 @@ static int update_array_info(struct mddev *mddev, mdu_array_info_t *info) } } md_update_sb(mddev, 1); - if (mddev_is_clustered(mddev)) - md_cluster_ops->metadata_update_finish(mddev); return rv; err: - if (mddev_is_clustered(mddev)) - md_cluster_ops->metadata_update_cancel(mddev); return rv; } @@ -7599,11 +7625,7 @@ int md_allow_write(struct mddev *mddev) mddev->safemode == 0) mddev->safemode = 1; spin_unlock(&mddev->lock); - if (mddev_is_clustered(mddev)) - md_cluster_ops->metadata_update_start(mddev); md_update_sb(mddev, 0); - if (mddev_is_clustered(mddev)) - md_cluster_ops->metadata_update_finish(mddev); sysfs_notify_dirent_safe(mddev->sysfs_state); } else spin_unlock(&mddev->lock); @@ -8182,13 +8204,8 @@ void md_check_recovery(struct mddev *mddev) sysfs_notify_dirent_safe(mddev->sysfs_state); } - if (mddev->flags & MD_UPDATE_SB_FLAGS) { - if (mddev_is_clustered(mddev)) - md_cluster_ops->metadata_update_start(mddev); + if (mddev->flags & MD_UPDATE_SB_FLAGS) md_update_sb(mddev, 0); - if (mddev_is_clustered(mddev)) - md_cluster_ops->metadata_update_finish(mddev); - } if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && !test_bit(MD_RECOVERY_DONE, &mddev->recovery)) { @@ -8286,8 +8303,6 @@ void md_reap_sync_thread(struct mddev *mddev) set_bit(MD_CHANGE_DEVS, &mddev->flags); } } - if (mddev_is_clustered(mddev)) - md_cluster_ops->metadata_update_start(mddev); if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) && mddev->pers->finish_reshape) mddev->pers->finish_reshape(mddev); @@ -8300,8 +8315,6 @@ void md_reap_sync_thread(struct mddev *mddev) rdev->saved_raid_disk = -1; md_update_sb(mddev, 1); - if (mddev_is_clustered(mddev)) - md_cluster_ops->metadata_update_finish(mddev); clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery); clear_bit(MD_RECOVERY_DONE, &mddev->recovery); clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); |
