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path: root/drivers/md/dm-raid.c
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Diffstat (limited to 'drivers/md/dm-raid.c')
-rw-r--r--drivers/md/dm-raid.c111
1 files changed, 109 insertions, 2 deletions
diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c
index 311e3d35b272..1d3fe1a40a9b 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,