aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/md/md.c
diff options
context:
space:
mode:
authorNeilBrown <neilb@suse.de>2009-05-25 19:41:17 -0400
committerNeilBrown <neilb@suse.de>2009-05-25 19:41:17 -0400
commitb6a9ce688f613e2ee5f15e6720e0bb8520efc36e (patch)
tree7fc4c8ab5ea14df5e544e740ec3154b707766a08 /drivers/md/md.c
parentbe512691036cc989c11d0f418187efbbf14468e6 (diff)
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.c11
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
3306action_show(mddev_t *mddev, char *page) 3306action_show(mddev_t *mddev, char *page)
3307{ 3307{
3308 char *type = "idle"; 3308 char *type = "idle";
3309 if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) || 3309 if (test_bit(MD_RECOVERY_FROZEN, &mddev->recovery))
3310 type = "frozen";
3311 else if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) ||
3310 (!mddev->ro && test_bit(MD_RECOVERY_NEEDED, &mddev->recovery))) { 3312 (!mddev->ro && test_bit(MD_RECOVERY_NEEDED, &mddev->recovery))) {
3311 if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) 3313 if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery))
3312 type = "reshape"; 3314 type = "reshape";
@@ -3329,7 +3331,12 @@ action_store(mddev_t *mddev, const char *page, size_t len)
3329 if (!mddev->pers || !mddev->pers->sync_request) 3331 if (!mddev->pers || !mddev->pers->sync_request)
3330 return -EINVAL; 3332 return -EINVAL;
3331 3333
3332 if (cmd_match(page, "idle")) { 3334 if (cmd_match(page, "frozen"))
3335 set_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
3336 else
3337 clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
3338
3339 if (cmd_match(page, "idle") || cmd_match(page, "frozen")) {
3333 if (mddev->sync_thread) { 3340 if (mddev->sync_thread) {
3334 set_bit(MD_RECOVERY_INTR, &mddev->recovery); 3341 set_bit(MD_RECOVERY_INTR, &mddev->recovery);
3335 md_unregister_thread(mddev->sync_thread); 3342 md_unregister_thread(mddev->sync_thread);