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dm raid: fix rs_get_progress() synchronization state/ratio
Fix various sync state issues causing racy/bogus sync ratio, sync_action ad health chars in dm_status() info output. Sync ratio could be N/N (i.e. 100%) shortly after raid set creation, i.e. creating a new RaidLV or upconverting a linear LV to raid1 thus: "0 2097152 raid raid1 2 Aa 2097162/2097152 recover 0 0 -" instead of: "0 2097152 raid raid1 2 Aa 0/2097152 idle 0 0 -" Sync action could be non-idle, when the MD thread was done with io. Health chars could be 'A' when they should be 'a' for a short time before a resynchonization started. Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Heinz Mauelshagen
Mike Snitzer
parent
242ea5ad11
commit
4102d9de6d
@ -210,6 +210,7 @@ struct raid_dev {
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#define RT_FLAG_RESHAPE_RS 4
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#define RT_FLAG_RS_SUSPENDED 5
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#define RT_FLAG_RS_IN_SYNC 6
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#define RT_FLAG_RS_RESYNCING 7
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/* Array elements of 64 bit needed for rebuild/failed disk bits */
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#define DISKS_ARRAY_ELEMS ((MAX_RAID_DEVICES + (sizeof(uint64_t) * 8 - 1)) / sizeof(uint64_t) / 8)
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@ -3306,8 +3307,10 @@ static const char *decipher_sync_action(struct mddev *mddev, unsigned long recov
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if (test_bit(MD_RECOVERY_FROZEN, &recovery))
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return "frozen";
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if (test_bit(MD_RECOVERY_RUNNING, &recovery) ||
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(!mddev->ro && test_bit(MD_RECOVERY_NEEDED, &recovery))) {
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/* The MD sync thread can be done with io but still be running */
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if (!test_bit(MD_RECOVERY_DONE, &recovery) &&
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(test_bit(MD_RECOVERY_RUNNING, &recovery) ||
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(!mddev->ro && test_bit(MD_RECOVERY_NEEDED, &recovery)))) {
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if (test_bit(MD_RECOVERY_RESHAPE, &recovery))
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return "reshape";
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@ -3344,8 +3347,9 @@ static const char *__raid_dev_status(struct raid_set *rs, struct md_rdev *rdev)
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return "D";
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else if (test_bit(Journal, &rdev->flags))
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return (rs->journal_dev.mode == R5C_JOURNAL_MODE_WRITE_THROUGH) ? "A" : "a";
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else if (!test_bit(RT_FLAG_RS_IN_SYNC, &rs->runtime_flags) &&
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!test_bit(In_sync, &rdev->flags))
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else if (test_bit(RT_FLAG_RS_RESYNCING, &rs->runtime_flags) ||
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(!test_bit(RT_FLAG_RS_IN_SYNC, &rs->runtime_flags) &&
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!test_bit(In_sync, &rdev->flags)))
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return "a";
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else
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return "A";
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@ -3355,49 +3359,70 @@ static const char *__raid_dev_status(struct raid_set *rs, struct md_rdev *rdev)
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static sector_t rs_get_progress(struct raid_set *rs, unsigned long recovery,
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sector_t resync_max_sectors)
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{
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sector_t r, curr_resync_completed;
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sector_t r;
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struct mddev *mddev = &rs->md;
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clear_bit(RT_FLAG_RS_IN_SYNC, &rs->runtime_flags);
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curr_resync_completed = mddev->curr_resync_completed ?: mddev->recovery_cp;
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clear_bit(RT_FLAG_RS_RESYNCING, &rs->runtime_flags);
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if (rs_is_raid0(rs)) {
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r = resync_max_sectors;
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set_bit(RT_FLAG_RS_IN_SYNC, &rs->runtime_flags);
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} else {
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r = mddev->reshape_position;
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/* Reshape is relative to the array size */
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if (test_bit(MD_RECOVERY_RESHAPE, &recovery) ||
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r != MaxSector) {
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if (r == MaxSector) {
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set_bit(RT_FLAG_RS_IN_SYNC, &rs->runtime_flags);
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r = resync_max_sectors;
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} else {
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if (test_bit(MD_RECOVERY_RESHAPE, &recovery)) {
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r = mddev->reshape_position;
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if (r != MaxSector) {
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/* Got to reverse on backward reshape */
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if (mddev->reshape_backwards)
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r = mddev->array_sectors - r;
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/* Devide by # of data stripes */
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/* Divide by # of data stripes unless raid1 */
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if (!rs_is_raid1(rs))
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sector_div(r, mddev_data_stripes(rs));
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}
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/* Sync is relative to the component device size */
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} else if (test_bit(MD_RECOVERY_RUNNING, &recovery))
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r = curr_resync_completed;
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/*
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* Sync/recover is relative to the component device size.
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*
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* MD_RECOVERY_NEEDED for https://bugzilla.redhat.com/show_bug.cgi?id=1508070
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*/
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} else if (test_bit(MD_RECOVERY_NEEDED, &recovery) ||
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test_bit(MD_RECOVERY_RUNNING, &recovery))
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r = mddev->curr_resync_completed;
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else
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r = mddev->recovery_cp;
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if ((r == MaxSector) ||
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(test_bit(MD_RECOVERY_DONE, &recovery) &&
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(mddev->curr_resync_completed == resync_max_sectors))) {
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if (r >= resync_max_sectors &&
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(!test_bit(MD_RECOVERY_REQUESTED, &recovery) ||
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(!test_bit(MD_RECOVERY_FROZEN, &recovery) &&
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!test_bit(MD_RECOVERY_NEEDED, &recovery) &&
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!test_bit(MD_RECOVERY_RUNNING, &recovery)))) {
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/*
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* Sync complete.
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*/
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/* In case we have finished recovering, the array is in sync. */
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if (test_bit(MD_RECOVERY_RECOVER, &recovery))
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set_bit(RT_FLAG_RS_IN_SYNC, &rs->runtime_flags);
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r = resync_max_sectors;
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} else if (test_bit(MD_RECOVERY_RECOVER, &recovery)) {
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/*
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* In case we are recovering, the array is not in sync
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* and health chars should show the recovering legs.
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*/
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;
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} else if (test_bit(MD_RECOVERY_SYNC, &recovery) &&
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!test_bit(MD_RECOVERY_REQUESTED, &recovery)) {
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/*
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* If "resync" is occurring, the raid set
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* is or may be out of sync hence the health
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* characters shall be 'a'.
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*/
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set_bit(RT_FLAG_RS_RESYNCING, &rs->runtime_flags);
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} else if (test_bit(MD_RECOVERY_REQUESTED, &recovery)) {
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/*
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* If "check" or "repair" is occurring, the raid set has
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@ -3405,26 +3430,34 @@ static sector_t rs_get_progress(struct raid_set *rs, unsigned long recovery,
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* should not be 'a' anymore.
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*/
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set_bit(RT_FLAG_RS_IN_SYNC, &rs->runtime_flags);
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} else {
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struct md_rdev *rdev;
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/*
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* We are idle and recovery is needed, prevent 'A' chars race
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* caused by components still set to in-sync by constrcuctor.
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*/
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if (test_bit(MD_RECOVERY_NEEDED, &recovery))
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set_bit(RT_FLAG_RS_RESYNCING, &rs->runtime_flags);
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/*
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* The raid set may be doing an initial sync, or it may
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* be rebuilding individual components. If all the
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* devices are In_sync, then it is the raid set that is
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* being initialized.
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*/
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set_bit(RT_FLAG_RS_IN_SYNC, &rs->runtime_flags);
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rdev_for_each(rdev, mddev)
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if (!test_bit(Journal, &rdev->flags) &&
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!test_bit(In_sync, &rdev->flags))
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set_bit(RT_FLAG_RS_IN_SYNC, &rs->runtime_flags);
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#if 0
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r = 0; /* HM FIXME: TESTME: https://bugzilla.redhat.com/show_bug.cgi?id=1210637 ? */
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#endif
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!test_bit(In_sync, &rdev->flags)) {
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clear_bit(RT_FLAG_RS_IN_SYNC, &rs->runtime_flags);
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break;
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}
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}
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}
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return r;
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return min(r, resync_max_sectors);
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}
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/* Helper to return @dev name or "-" if !@dev */
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