diff options
Diffstat (limited to 'drivers/md/md.c')
-rw-r--r-- | drivers/md/md.c | 114 |
1 files changed, 87 insertions, 27 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index 5d1b6762f10..9417ae2fa0b 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -1713,6 +1713,8 @@ static int super_1_validate(struct mddev *mddev, struct md_rdev *rdev) } if (sb->devflags & WriteMostly1) set_bit(WriteMostly, &rdev->flags); + if (le32_to_cpu(sb->feature_map) & MD_FEATURE_REPLACEMENT) + set_bit(Replacement, &rdev->flags); } else /* MULTIPATH are always insync */ set_bit(In_sync, &rdev->flags); @@ -1766,6 +1768,9 @@ static void super_1_sync(struct mddev *mddev, struct md_rdev *rdev) sb->recovery_offset = cpu_to_le64(rdev->recovery_offset); } + if (test_bit(Replacement, &rdev->flags)) + sb->feature_map |= + cpu_to_le32(MD_FEATURE_REPLACEMENT); if (mddev->reshape_position != MaxSector) { sb->feature_map |= cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE); @@ -2559,6 +2564,15 @@ state_show(struct md_rdev *rdev, char *page) len += sprintf(page+len, "%swrite_error", sep); sep = ","; } + if (test_bit(WantReplacement, &rdev->flags)) { + len += sprintf(page+len, "%swant_replacement", sep); + sep = ","; + } + if (test_bit(Replacement, &rdev->flags)) { + len += sprintf(page+len, "%sreplacement", sep); + sep = ","; + } + return len+sprintf(page+len, "\n"); } @@ -2627,6 +2641,42 @@ state_store(struct md_rdev *rdev, const char *buf, size_t len) } else if (cmd_match(buf, "-write_error")) { clear_bit(WriteErrorSeen, &rdev->flags); err = 0; + } else if (cmd_match(buf, "want_replacement")) { + /* Any non-spare device that is not a replacement can + * become want_replacement at any time, but we then need to + * check if recovery is needed. + */ + if (rdev->raid_disk >= 0 && + !test_bit(Replacement, &rdev->flags)) + set_bit(WantReplacement, &rdev->flags); + set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); + md_wakeup_thread(rdev->mddev->thread); + err = 0; + } else if (cmd_match(buf, "-want_replacement")) { + /* Clearing 'want_replacement' is always allowed. + * Once replacements starts it is too late though. + */ + err = 0; + clear_bit(WantReplacement, &rdev->flags); + } else if (cmd_match(buf, "replacement")) { + /* Can only set a device as a replacement when array has not + * yet been started. Once running, replacement is automatic + * from spares, or by assigning 'slot'. + */ + if (rdev->mddev->pers) + err = -EBUSY; + else { + set_bit(Replacement, &rdev->flags); + err = 0; + } + } else if (cmd_match(buf, "-replacement")) { + /* Similarly, can only clear Replacement before start */ + if (rdev->mddev->pers) + err = -EBUSY; + else { + clear_bit(Replacement, &rdev->flags); + err = 0; + } } if (!err) sysfs_notify_dirent_safe(rdev->sysfs_state); @@ -2688,7 +2738,7 @@ slot_store(struct md_rdev *rdev, const char *buf, size_t len) if (rdev->mddev->pers->hot_remove_disk == NULL) return -EINVAL; err = rdev->mddev->pers-> - hot_remove_disk(rdev->mddev, rdev->raid_disk); + hot_remove_disk(rdev->mddev, rdev); if (err) return err; sysfs_unlink_rdev(rdev->mddev, rdev); @@ -2696,7 +2746,6 @@ slot_store(struct md_rdev *rdev, const char *buf, size_t len) set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery); md_wakeup_thread(rdev->mddev->thread); } else if (rdev->mddev->pers) { - struct md_rdev *rdev2; /* Activating a spare .. or possibly reactivating * if we ever get bitmaps working here. */ @@ -2710,10 +2759,6 @@ slot_store(struct md_rdev *rdev, const char *buf, size_t len) if (rdev->mddev->pers->hot_add_disk == NULL) return -EINVAL; - list_for_each_entry(rdev2, &rdev->mddev->disks, same_set) - if (rdev2->raid_disk == slot) - return -EEXIST; - if (slot >= rdev->mddev->raid_disks && slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) return -ENOSPC; @@ -4621,6 +4666,7 @@ static int md_alloc(dev_t dev, char *name) mddev->queue->queuedata = mddev; blk_queue_make_request(mddev->queue, md_make_request); + blk_set_stacking_limits(&mddev->queue->limits); disk = alloc_disk(1 << shift); if (!disk) { @@ -6053,8 +6099,15 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode, struct mddev *mddev = NULL; int ro; - if (!capable(CAP_SYS_ADMIN)) - return -EACCES; + switch (cmd) { + case RAID_VERSION: + case GET_ARRAY_INFO: + case GET_DISK_INFO: + break; + default: + if (!capable(CAP_SYS_ADMIN)) + return -EACCES; + } /* * Commands dealing with the RAID driver but not any @@ -6714,8 +6767,11 @@ static int md_seq_show(struct seq_file *seq, void *v) if (test_bit(Faulty, &rdev->flags)) { seq_printf(seq, "(F)"); continue; - } else if (rdev->raid_disk < 0) + } + if (rdev->raid_disk < 0) seq_printf(seq, "(S)"); /* spare */ + if (test_bit(Replacement, &rdev->flags)) + seq_printf(seq, "(R)"); sectors += rdev->sectors; } @@ -7327,6 +7383,7 @@ static int remove_and_add_spares(struct mddev *mddev) { struct md_rdev *rdev; int spares = 0; + int removed = 0; mddev->curr_resync_completed = 0; @@ -7337,29 +7394,32 @@ static int remove_and_add_spares(struct mddev *mddev) ! test_bit(In_sync, &rdev->flags)) && atomic_read(&rdev->nr_pending)==0) { if (mddev->pers->hot_remove_disk( - mddev, rdev->raid_disk)==0) { + mddev, rdev) == 0) { sysfs_unlink_rdev(mddev, rdev); rdev->raid_disk = -1; + removed++; } } + if (removed) + sysfs_notify(&mddev->kobj, NULL, + "degraded"); - if (mddev->degraded) { - list_for_each_entry(rdev, &mddev->disks, same_set) { - if (rdev->raid_disk >= 0 && - !test_bit(In_sync, &rdev->flags) && - !test_bit(Faulty, &rdev->flags)) + + list_for_each_entry(rdev, &mddev->disks, same_set) { + if (rdev->raid_disk >= 0 && + !test_bit(In_sync, &rdev->flags) && + !test_bit(Faulty, &rdev->flags)) + spares++; + if (rdev->raid_disk < 0 + && !test_bit(Faulty, &rdev->flags)) { + rdev->recovery_offset = 0; + if (mddev->pers-> + hot_add_disk(mddev, rdev) == 0) { + if (sysfs_link_rdev(mddev, rdev)) + /* failure here is OK */; spares++; - if (rdev->raid_disk < 0 - && !test_bit(Faulty, &rdev->flags)) { - rdev->recovery_offset = 0; - if (mddev->pers-> - hot_add_disk(mddev, rdev) == 0) { - if (sysfs_link_rdev(mddev, rdev)) - /* failure here is OK */; - spares++; - md_new_event(mddev); - set_bit(MD_CHANGE_DEVS, &mddev->flags); - } + md_new_event(mddev); + set_bit(MD_CHANGE_DEVS, &mddev->flags); } } } @@ -7474,7 +7534,7 @@ void md_check_recovery(struct mddev *mddev) test_bit(Faulty, &rdev->flags) && atomic_read(&rdev->nr_pending)==0) { if (mddev->pers->hot_remove_disk( - mddev, rdev->raid_disk)==0) { + mddev, rdev) == 0) { sysfs_unlink_rdev(mddev, rdev); rdev->raid_disk = -1; } |