From: Yufen Yu yuyufen@huawei.com
[ Upstream commit 07f1a6850c5d5a65c917c3165692b5179ac4cb6b ]
When run test case: mdadm -CR /dev/md1 -l 1 -n 4 /dev/sd[a-d] --assume-clean --bitmap=internal mdadm -S /dev/md1 mdadm -A /dev/md1 /dev/sd[b-c] --run --force
mdadm --zero /dev/sda mdadm /dev/md1 -a /dev/sda
echo offline > /sys/block/sdc/device/state echo offline > /sys/block/sdb/device/state sleep 5 mdadm -S /dev/md1
echo running > /sys/block/sdb/device/state echo running > /sys/block/sdc/device/state mdadm -A /dev/md1 /dev/sd[a-c] --run --force
mdadm run fail with kernel message as follow: [ 172.986064] md: kicking non-fresh sdb from array! [ 173.004210] md: kicking non-fresh sdc from array! [ 173.022383] md/raid1:md1: active with 0 out of 4 mirrors [ 173.022406] md1: failed to create bitmap (-5)
In fact, when active disk in raid1 array less than one, we need to return fail in raid1_run().
Reviewed-by: NeilBrown neilb@suse.de Signed-off-by: Yufen Yu yuyufen@huawei.com Signed-off-by: Song Liu songliubraving@fb.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/md/raid1.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index a26731a9b38e7..f393f0dc042fc 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -3096,6 +3096,13 @@ static int raid1_run(struct mddev *mddev) !test_bit(In_sync, &conf->mirrors[i].rdev->flags) || test_bit(Faulty, &conf->mirrors[i].rdev->flags)) mddev->degraded++; + /* + * RAID1 needs at least one disk in active + */ + if (conf->raid_disks - mddev->degraded < 1) { + ret = -EINVAL; + goto abort; + }
if (conf->raid_disks - mddev->degraded == 1) mddev->recovery_cp = MaxSector; @@ -3129,8 +3136,12 @@ static int raid1_run(struct mddev *mddev) ret = md_integrity_register(mddev); if (ret) { md_unregister_thread(&mddev->thread); - raid1_free(mddev, conf); + goto abort; } + return 0; + +abort: + raid1_free(mddev, conf); return ret; }