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authorNeilBrown <neilb@suse.de>2015-06-12 20:05:04 +1000
committerNeilBrown <neilb@suse.de>2015-06-12 20:16:33 +1000
commitea358cd0d2c634ff1379a1392edcdf2289f31e13 (patch)
tree10c556b9ae108c35af563df9041e3d1948295e66 /drivers
parent8e8e2518fceca407bb8fc2a6710d19d2e217892e (diff)
downloadlinux-ea358cd0d2c634ff1379a1392edcdf2289f31e13.tar.bz2
md: make sure MD_RECOVERY_DONE is clear before starting recovery/resync
MD_RECOVERY_DONE is normally cleared by md_check_recovery after a resync etc finished. However it is possible for raid5_start_reshape to race and start a reshape before MD_RECOVERY_DONE is cleared. This can lean to multiple reshapes running at the same time, which isn't good. To make sure it is cleared before starting a reshape, and also clear it when reaping a thread, just to be safe. Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/md/md.c1
-rw-r--r--drivers/md/raid10.c1
-rw-r--r--drivers/md/raid5.c1
3 files changed, 3 insertions, 0 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 8d4408baa428..4dbed4a67aaf 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -8262,6 +8262,7 @@ void md_reap_sync_thread(struct mddev *mddev)
if (mddev_is_clustered(mddev))
md_cluster_ops->metadata_update_finish(mddev);
clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery);
+ clear_bit(MD_RECOVERY_DONE, &mddev->recovery);
clear_bit(MD_RECOVERY_SYNC, &mddev->recovery);
clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery);
clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery);
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index e793ab6b3570..f55c3f35b746 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -4156,6 +4156,7 @@ static int raid10_start_reshape(struct mddev *mddev)
clear_bit(MD_RECOVERY_SYNC, &mddev->recovery);
clear_bit(MD_RECOVERY_CHECK, &mddev->recovery);
+ clear_bit(MD_RECOVERY_DONE, &mddev->recovery);
set_bit(MD_RECOVERY_RESHAPE, &mddev->recovery);
set_bit(MD_RECOVERY_RUNNING, &mddev->recovery);
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 553d54b87052..b6793d2e051f 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -7354,6 +7354,7 @@ static int raid5_start_reshape(struct mddev *mddev)
clear_bit(MD_RECOVERY_SYNC, &mddev->recovery);
clear_bit(MD_RECOVERY_CHECK, &mddev->recovery);
+ clear_bit(MD_RECOVERY_DONE, &mddev->recovery);
set_bit(MD_RECOVERY_RESHAPE, &mddev->recovery);
set_bit(MD_RECOVERY_RUNNING, &mddev->recovery);
mddev->sync_thread = md_register_thread(md_do_sync, mddev,