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md/raid5: don't start reshape when recovery or replace is in progress

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When recovery is interrupted (reboot, etc.) check for MD_RECOVERY_RUNNING
is not enough to tell recovery is in progress. Also check recovery_cp
before starting reshape.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230529133410.2125914-1-yukuai1@huaweicloud.com
This commit is contained in:
Yu Kuai
2023-05-29 21:34:10 +08:00
committed by Song Liu
parent 4469315439
commit 75aa7a1b8f
1 changed files with 8 additions and 0 deletions
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8
drivers/md/raid5.c
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@@ -8525,6 +8525,7 @@ static int raid5_start_reshape(struct mddev *mddev)
struct r5conf *conf = mddev->private;
struct md_rdev *rdev;
int spares = 0;
int i;
unsigned long flags;
if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery))
@@ -8536,6 +8537,13 @@ static int raid5_start_reshape(struct mddev *mddev)
if (has_failed(conf))
return -EINVAL;
/* raid5 can't handle concurrent reshape and recovery */
if (mddev->recovery_cp < MaxSector)
return -EBUSY;
for (i = 0; i < conf->raid_disks; i++)
if (rdev_mdlock_deref(mddev, conf->disks[i].replacement))
return -EBUSY;
rdev_for_each(rdev, mddev) {
if (!test_bit(In_sync, &rdev->flags)
&& !test_bit(Faulty, &rdev->flags))