diff options
| author | NeilBrown <neilb@suse.de> | 2009-05-26 09:41:17 +1000 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2009-05-26 09:41:17 +1000 |
| commit | b6a9ce688f613e2ee5f15e6720e0bb8520efc36e (patch) | |
| tree | 7fc4c8ab5ea14df5e544e740ec3154b707766a08 /drivers/md/md.c | |
| parent | be512691036cc989c11d0f418187efbbf14468e6 (diff) | |
| download | lwn-b6a9ce688f613e2ee5f15e6720e0bb8520efc36e.tar.gz lwn-b6a9ce688f613e2ee5f15e6720e0bb8520efc36e.zip | |
md: export 'frozen' resync state through sysfs
The md resync engine has a 'frozen' state which ensures that
no resync/recovery. This is used to avoid races.
Export this state through the 'sync_action' sysfs attribute
so that user-space can benefit and also avoid some races.
Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md/md.c')
| -rw-r--r-- | drivers/md/md.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index 58e0b02a74c2..384e4f0904c8 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -3306,7 +3306,9 @@ static ssize_t action_show(mddev_t *mddev, char *page) { char *type = "idle"; - if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || + if (test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) + type = "frozen"; + else 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)) type = "reshape"; @@ -3329,7 +3331,12 @@ action_store(mddev_t *mddev, const char *page, size_t len) if (!mddev->pers || !mddev->pers->sync_request) return -EINVAL; - if (cmd_match(page, "idle")) { + if (cmd_match(page, "frozen")) + set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); + else + clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); + + if (cmd_match(page, "idle") || cmd_match(page, "frozen")) { if (mddev->sync_thread) { set_bit(MD_RECOVERY_INTR, &mddev->recovery); md_unregister_thread(mddev->sync_thread); |