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blk-iocost: don't allow to configure bio based device

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iocost is based on rq_qos, which can only work for request based device,
thus it doesn't make sense to configure iocost for bio based device.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20230117070806.3857142-3-yukuai1@huaweicloud.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Yu Kuai 2023-01-17 15:08:03 +08:00 committed by Jens Axboe
parent 7b7c5ae440
commit 235a5a83f6
1 changed files with 10 additions and 0 deletions
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10
block/blk-iocost.c
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@ -3187,6 +3187,11 @@ static ssize_t ioc_qos_write(struct kernfs_open_file *of, char *input,
return PTR_ERR(bdev);
disk = bdev->bd_disk;
if (!queue_is_mq(disk->queue)) {
ret = -EOPNOTSUPP;
goto err;
}
ioc = q_to_ioc(disk->queue);
if (!ioc) {
ret = blk_iocost_init(disk);
@ -3367,6 +3372,11 @@ static ssize_t ioc_cost_model_write(struct kernfs_open_file *of, char *input,
return PTR_ERR(bdev);
q = bdev_get_queue(bdev);
if (!queue_is_mq(q)) {
ret = -EOPNOTSUPP;
goto err;
}
ioc = q_to_ioc(q);
if (!ioc) {
ret = blk_iocost_init(bdev->bd_disk);