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rbd: use blk_mq_alloc_disk and blk_cleanup_disk

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Use blk_mq_alloc_disk and blk_cleanup_disk to simplify the gendisk and
request_queue allocation.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Link: https://lore.kernel.org/r/20210602065345.355274-23-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2021-06-02 09:53:37 +03:00 committed by Jens Axboe
parent 262d431f90
commit 195b1956b8
1 changed files with 18 additions and 34 deletions
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52
drivers/block/rbd.c
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@ -4750,9 +4750,8 @@ static blk_status_t rbd_queue_rq(struct blk_mq_hw_ctx *hctx,
static void rbd_free_disk(struct rbd_device *rbd_dev)
{
blk_cleanup_queue(rbd_dev->disk->queue);
blk_cleanup_disk(rbd_dev->disk);
blk_mq_free_tag_set(&rbd_dev->tag_set);
put_disk(rbd_dev->disk);
rbd_dev->disk = NULL;
}
@ -4922,22 +4921,6 @@ static int rbd_init_disk(struct rbd_device *rbd_dev)
rbd_dev->layout.object_size * rbd_dev->layout.stripe_count;
int err;
/* create gendisk info */
disk = alloc_disk(single_major ?
(1 << RBD_SINGLE_MAJOR_PART_SHIFT) :
RBD_MINORS_PER_MAJOR);
if (!disk)
return -ENOMEM;
snprintf(disk->disk_name, sizeof(disk->disk_name), RBD_DRV_NAME "%d",
rbd_dev->dev_id);
disk->major = rbd_dev->major;
disk->first_minor = rbd_dev->minor;
if (single_major)
disk->flags |= GENHD_FL_EXT_DEVT;
disk->fops = &rbd_bd_ops;
disk->private_data = rbd_dev;
memset(&rbd_dev->tag_set, 0, sizeof(rbd_dev->tag_set));
rbd_dev->tag_set.ops = &rbd_mq_ops;
rbd_dev->tag_set.queue_depth = rbd_dev->opts->queue_depth;
@ -4948,13 +4931,26 @@ static int rbd_init_disk(struct rbd_device *rbd_dev)
err = blk_mq_alloc_tag_set(&rbd_dev->tag_set);
if (err)
goto out_disk;
return err;
q = blk_mq_init_queue(&rbd_dev->tag_set);
if (IS_ERR(q)) {
err = PTR_ERR(q);
disk = blk_mq_alloc_disk(&rbd_dev->tag_set, rbd_dev);
if (IS_ERR(disk)) {
err = PTR_ERR(disk);
goto out_tag_set;
}
q = disk->queue;
snprintf(disk->disk_name, sizeof(disk->disk_name), RBD_DRV_NAME "%d",
rbd_dev->dev_id);
disk->major = rbd_dev->major;
disk->first_minor = rbd_dev->minor;
if (single_major) {
disk->minors = (1 << RBD_SINGLE_MAJOR_PART_SHIFT);
disk->flags |= GENHD_FL_EXT_DEVT;
} else {
disk->minors = RBD_MINORS_PER_MAJOR;
}
disk->fops = &rbd_bd_ops;
blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
/* QUEUE_FLAG_ADD_RANDOM is off by default for blk-mq */
@ -4976,21 +4972,11 @@ static int rbd_init_disk(struct rbd_device *rbd_dev)
if (!ceph_test_opt(rbd_dev->rbd_client->client, NOCRC))
blk_queue_flag_set(QUEUE_FLAG_STABLE_WRITES, q);
/*
* disk_release() expects a queue ref from add_disk() and will
* put it. Hold an extra ref until add_disk() is called.
*/
WARN_ON(!blk_get_queue(q));
disk->queue = q;
q->queuedata = rbd_dev;
rbd_dev->disk = disk;
return 0;
out_tag_set:
blk_mq_free_tag_set(&rbd_dev->tag_set);
out_disk:
put_disk(disk);
return err;
}
@ -7088,8 +7074,6 @@ static ssize_t do_rbd_add(struct bus_type *bus,
goto err_out_image_lock;
device_add_disk(&rbd_dev->dev, rbd_dev->disk, NULL);
/* see rbd_init_disk() */
blk_put_queue(rbd_dev->disk->queue);
spin_lock(&rbd_dev_list_lock);
list_add_tail(&rbd_dev->node, &rbd_dev_list);