diff options
| author | NeilBrown <neilb@suse.de> | 2011-12-23 00:17:53 +0100 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2011-12-23 00:17:53 +0100 |
| commit | 7bfec5f35c68121e7b1849f3f4166dd96c8da5b3 (patch) | |
| tree | 14bab6480ccc14a6cdf9e5ee34662897e5e2e94a | |
| parent | md/raid5: recognise replacements when assembling array. (diff) | |
| download | linux-7bfec5f35c68121e7b1849f3f4166dd96c8da5b3.tar.xz linux-7bfec5f35c68121e7b1849f3f4166dd96c8da5b3.zip | |
md/raid5: If there is a spare and a want_replacement device, start replacement.
When attempting to add a spare to a RAID[456] array, also consider
adding it as a replacement for a want_replacement device.
This requires that common md code attempt hot_add even when the array
is not formally degraded.
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
| -rw-r--r-- | drivers/md/md.c | 30 | ||||
| -rw-r--r-- | drivers/md/raid5.c | 16 |
2 files changed, 28 insertions, 18 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index be569eb41a93..1c1c562f63dc 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -7399,23 +7399,21 @@ static int remove_and_add_spares(struct mddev *mddev) } } - 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); } } } diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index c80f8c2471cc..b2c83859f75b 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -5376,8 +5376,9 @@ static int raid5_add_disk(struct mddev *mddev, struct md_rdev *rdev) disk = rdev->saved_raid_disk; else disk = first; - for ( ; disk <= last ; disk++) - if ((p=conf->disks + disk)->rdev == NULL) { + for ( ; disk <= last ; disk++) { + p = conf->disks + disk; + if (p->rdev == NULL) { clear_bit(In_sync, &rdev->flags); rdev->raid_disk = disk; err = 0; @@ -5386,6 +5387,17 @@ static int raid5_add_disk(struct mddev *mddev, struct md_rdev *rdev) rcu_assign_pointer(p->rdev, rdev); break; } + if (test_bit(WantReplacement, &p->rdev->flags) && + p->replacement == NULL) { + clear_bit(In_sync, &rdev->flags); + set_bit(Replacement, &rdev->flags); + rdev->raid_disk = disk; + err = 0; + conf->fullsync = 1; + rcu_assign_pointer(p->replacement, rdev); + break; + } + } print_raid5_conf(conf); return err; } |