diff options
Diffstat (limited to 'drivers/md/dm-raid.c')
| -rw-r--r-- | drivers/md/dm-raid.c | 111 |
1 files changed, 109 insertions, 2 deletions
diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c index 311e3d35b27..1d3fe1a40a9 100644 --- a/drivers/md/dm-raid.c +++ b/drivers/md/dm-raid.c @@ -1279,6 +1279,31 @@ static int raid_map(struct dm_target *ti, struct bio *bio) return DM_MAPIO_SUBMITTED; } +static const char *decipher_sync_action(struct mddev *mddev) +{ + if (test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) + return "frozen"; + + if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || + (!mddev->ro && test_bit(MD_RECOVERY_NEEDED, &mddev->recovery))) { + if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) + return "reshape"; + + if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { + if (!test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) + return "resync"; + else if (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)) + return "check"; + return "repair"; + } + + if (test_bit(MD_RECOVERY_RECOVER, &mddev->recovery)) + return "recover"; + } + + return "idle"; +} + static void raid_status(struct dm_target *ti, status_type_t type, unsigned status_flags, char *result, unsigned maxlen) { @@ -1298,8 +1323,18 @@ static void raid_status(struct dm_target *ti, status_type_t type, sync = rs->md.recovery_cp; if (sync >= rs->md.resync_max_sectors) { + /* + * Sync complete. + */ array_in_sync = 1; sync = rs->md.resync_max_sectors; + } else if (test_bit(MD_RECOVERY_REQUESTED, &rs->md.recovery)) { + /* + * If "check" or "repair" is occurring, the array has + * undergone and initial sync and the health characters + * should not be 'a' anymore. + */ + array_in_sync = 1; } else { /* * The array may be doing an initial sync, or it may @@ -1311,6 +1346,7 @@ static void raid_status(struct dm_target *ti, status_type_t type, if (!test_bit(In_sync, &rs->dev[i].rdev.flags)) array_in_sync = 1; } + /* * Status characters: * 'D' = Dead/Failed device @@ -1339,6 +1375,21 @@ static void raid_status(struct dm_target *ti, status_type_t type, (unsigned long long) sync, (unsigned long long) rs->md.resync_max_sectors); + /* + * Sync action: + * See Documentation/device-mapper/dm-raid.c for + * information on each of these states. + */ + DMEMIT(" %s", decipher_sync_action(&rs->md)); + + /* + * resync_mismatches/mismatch_cnt + * This field shows the number of discrepancies found when + * performing a "check" of the array. + */ + DMEMIT(" %llu", + (unsigned long long) + atomic64_read(&rs->md.resync_mismatches)); break; case STATUSTYPE_TABLE: /* The string you would use to construct this array */ @@ -1425,7 +1476,62 @@ static void raid_status(struct dm_target *ti, status_type_t type, } } -static int raid_iterate_devices(struct dm_target *ti, iterate_devices_callout_fn fn, void *data) +static int raid_message(struct dm_target *ti, unsigned argc, char **argv) +{ + struct raid_set *rs = ti->private; + struct mddev *mddev = &rs->md; + + if (!strcasecmp(argv[0], "reshape")) { + DMERR("Reshape not supported."); + return -EINVAL; + } + + if (!mddev->pers || !mddev->pers->sync_request) + return -EINVAL; + + if (!strcasecmp(argv[0], "frozen")) + set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); + else + clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); + + if (!strcasecmp(argv[0], "idle") || !strcasecmp(argv[0], "frozen")) { + if (mddev->sync_thread) { + set_bit(MD_RECOVERY_INTR, &mddev->recovery); + md_reap_sync_thread(mddev); + } + } else if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || + test_bit(MD_RECOVERY_NEEDED, &mddev->recovery)) + return -EBUSY; + else if (!strcasecmp(argv[0], "resync")) + set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); + else if (!strcasecmp(argv[0], "recover")) { + set_bit(MD_RECOVERY_RECOVER, &mddev->recovery); + set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); + } else { + if (!strcasecmp(argv[0], "check")) + set_bit(MD_RECOVERY_CHECK, &mddev->recovery); + else if (!!strcasecmp(argv[0], "repair")) + return -EINVAL; + set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); + set_bit(MD_RECOVERY_SYNC, &mddev->recovery); + } + if (mddev->ro == 2) { + /* A write to sync_action is enough to justify + * canceling read-auto mode + */ + mddev->ro = 0; + if (!mddev->suspended) + md_wakeup_thread(mddev->sync_thread); + } + set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); + if (!mddev->suspended) + md_wakeup_thread(mddev->thread); + + return 0; +} + +static int raid_iterate_devices(struct dm_target *ti, + iterate_devices_callout_fn fn, void *data) { struct raid_set *rs = ti->private; unsigned i; @@ -1482,12 +1588,13 @@ static void raid_resume(struct dm_target *ti) static struct target_type raid_target = { .name = "raid", - .version = {1, 4, 2}, + .version = {1, 5, 0}, .module = THIS_MODULE, .ctr = raid_ctr, .dtr = raid_dtr, .map = raid_map, .status = raid_status, + .message = raid_message, .iterate_devices = raid_iterate_devices, .io_hints = raid_io_hints, .presuspend = raid_presuspend, |