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md: factor out a helper to sync mddev

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There are no functional changes, prepare to sync mddev in
array_state_store().

Signed-off-by: Li Nan <linan122@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20240226031444.3606764-7-linan666@huaweicloud.com
This commit is contained in:
Li Nan
2024-02-26 11:14:41 +08:00
committed by Song Liu
parent 9674f54e41
commit f74aaf614e
1 changed files with 21 additions and 11 deletions
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drivers/md/md.c
+21 -11
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@@ -529,6 +529,24 @@ void mddev_resume(struct mddev *mddev)
}
EXPORT_SYMBOL_GPL(mddev_resume);
/* sync bdev before setting device to readonly or stopping raid*/
static int mddev_set_closing_and_sync_blockdev(struct mddev *mddev, int opener_num)
{
mutex_lock(&mddev->open_mutex);
if (mddev->pers && atomic_read(&mddev->openers) > opener_num) {
mutex_unlock(&mddev->open_mutex);
return -EBUSY;
}
if (test_and_set_bit(MD_CLOSING, &mddev->flags)) {
mutex_unlock(&mddev->open_mutex);
return -EBUSY;
}
mutex_unlock(&mddev->open_mutex);
sync_blockdev(mddev->gendisk->part0);
return 0;
}
/*
* Generic flush handling for md
*/
@@ -7658,17 +7676,9 @@ static int md_ioctl(struct block_device *bdev, blk_mode_t mode,
/* Need to flush page cache, and ensure no-one else opens
* and writes
*/
mutex_lock(&mddev->open_mutex);
if (mddev->pers && atomic_read(&mddev->openers) > 1) {
mutex_unlock(&mddev->open_mutex);
return -EBUSY;
}
if (test_and_set_bit(MD_CLOSING, &mddev->flags)) {
mutex_unlock(&mddev->open_mutex);
return -EBUSY;
}
mutex_unlock(&mddev->open_mutex);
sync_blockdev(bdev);
err = mddev_set_closing_and_sync_blockdev(mddev, 1);
if (err)
return err;
}
if (!md_is_rdwr(mddev))