From: Guoqing Jiang jgq516@gmail.com
[ Upstream commit 062f5b2ae12a153644c765e7ba3b0f825427be1d ]
When a disk is added to array, the following path is called in mdadm.
Manage_subdevs -> sysfs_freeze_array -> Manage_add -> sysfs_set_str(&info, NULL, "sync_action","idle")
Then from kernel side, Manage_add invokes the path (add_new_disk -> validate_super = super_1_validate) to set In_sync flag.
Since In_sync means "device is in_sync with rest of array", and the new added disk need to resync thread to help the synchronization of data. And md_reap_sync_thread would call spare_active to set In_sync for the new added disk finally. So don't set In_sync if array is in frozen.
Signed-off-by: Guoqing Jiang guoqing.jiang@cloud.ionos.com Signed-off-by: Song Liu songliubraving@fb.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/md/md.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/md/md.c b/drivers/md/md.c index 73758b3679a11..277025784d6c0 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -1770,8 +1770,15 @@ static int super_1_validate(struct mddev *mddev, struct md_rdev *rdev) if (!(le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_BITMAP)) rdev->saved_raid_disk = -1; - } else - set_bit(In_sync, &rdev->flags); + } else { + /* + * If the array is FROZEN, then the device can't + * be in_sync with rest of array. + */ + if (!test_bit(MD_RECOVERY_FROZEN, + &mddev->recovery)) + set_bit(In_sync, &rdev->flags); + } rdev->raid_disk = role; break; }