diff options
| author | Yu Kuai | 2023-12-05 17:42:14 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2023-12-13 18:39:17 +0100 |
| commit | 3c796895b4e24015a3768ac1fb70c85e6b13826f (patch) | |
| tree | 1249d5803d736cc1d0c9657190255264d2a32084 | |
| parent | 5255ded034227e93f77028613bcde4d32a02c1d9 (diff) | |
md: don't leave 'MD_RECOVERY_FROZEN' in error path of md_set_readonly()
[ Upstream commit c9f7cb5b2bc968adcdc686c197ed108f47fd8eb0 ]
If md_set_readonly() failed, the array could still be read-write, however
'MD_RECOVERY_FROZEN' could still be set, which leave the array in an
abnormal state that sync or recovery can't continue anymore.
Hence make sure the flag is cleared after md_set_readonly() returns.
Fixes: 88724bfa68be ("md: wait for pending superblock updates before switching to read-only")
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Acked-by: Xiao Ni <xni@redhat.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20231205094215.1824240-3-yukuai1@huaweicloud.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/md/md.c | 24 |
1 files changed, 13 insertions, 11 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index 246af78c05dd..0c2801d77090 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -6314,6 +6314,9 @@ static int md_set_readonly(struct mddev *mddev, struct block_device *bdev) int err = 0; int did_freeze = 0; + if (mddev->external && test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) + return -EBUSY; + if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) { did_freeze = 1; set_bit(MD_RECOVERY_FROZEN, &mddev->recovery); @@ -6326,8 +6329,6 @@ static int md_set_readonly(struct mddev *mddev, struct block_device *bdev) * which will now never happen */ wake_up_process(mddev->sync_thread->tsk); - if (mddev->external && test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) - return -EBUSY; mddev_unlock(mddev); wait_event(resync_wait, !test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)); @@ -6340,29 +6341,30 @@ static int md_set_readonly(struct mddev *mddev, struct block_device *bdev) mddev->sync_thread || test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { pr_warn("md: %s still in use.\n",mdname(mddev)); - if (did_freeze) { - clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); - set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); - md_wakeup_thread(mddev->thread); - } err = -EBUSY; goto out; } + if (mddev->pers) { __md_stop_writes(mddev); - err = -ENXIO; - if (mddev->ro == MD_RDONLY) + if (mddev->ro == MD_RDONLY) { + err = -ENXIO; goto out; + } + mddev->ro = MD_RDONLY; set_disk_ro(mddev->gendisk, 1); + } + +out: + if ((mddev->pers && !err) || did_freeze) { clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); md_wakeup_thread(mddev->thread); sysfs_notify_dirent_safe(mddev->sysfs_state); - err = 0; } -out: + mutex_unlock(&mddev->open_mutex); return err; } |