diff options
Diffstat (limited to 'block/genhd.c')
| -rw-r--r-- | block/genhd.c | 120 |
1 files changed, 43 insertions, 77 deletions
diff --git a/block/genhd.c b/block/genhd.c index 27205ae47d59..e1d5b10ac193 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -101,29 +101,6 @@ bool set_capacity_and_notify(struct gendisk *disk, sector_t size) } EXPORT_SYMBOL_GPL(set_capacity_and_notify); -/* - * Format the device name of the indicated block device into the supplied buffer - * and return a pointer to that same buffer for convenience. - * - * Note: do not use this in new code, use the %pg specifier to sprintf and - * printk insted. - */ -const char *bdevname(struct block_device *bdev, char *buf) -{ - struct gendisk *hd = bdev->bd_disk; - int partno = bdev->bd_partno; - - if (!partno) - snprintf(buf, BDEVNAME_SIZE, "%s", hd->disk_name); - else if (isdigit(hd->disk_name[strlen(hd->disk_name)-1])) - snprintf(buf, BDEVNAME_SIZE, "%sp%d", hd->disk_name, partno); - else - snprintf(buf, BDEVNAME_SIZE, "%s%d", hd->disk_name, partno); - - return buf; -} -EXPORT_SYMBOL(bdevname); - static void part_stat_read_all(struct block_device *part, struct disk_stats *stat) { @@ -617,12 +594,15 @@ void del_gendisk(struct gendisk *disk) * Fail any new I/O. */ set_bit(GD_DEAD, &disk->state); + if (test_bit(GD_OWNS_QUEUE, &disk->state)) + blk_queue_flag_set(QUEUE_FLAG_DYING, q); set_capacity(disk, 0); /* * Prevent new I/O from crossing bio_queue_enter(). */ blk_queue_start_drain(q); + blk_mq_freeze_queue_wait(q); if (!(disk->flags & GENHD_FL_HIDDEN)) { sysfs_remove_link(&disk_to_dev(disk)->kobj, "bdi"); @@ -646,18 +626,32 @@ void del_gendisk(struct gendisk *disk) pm_runtime_set_memalloc_noio(disk_to_dev(disk), false); device_del(disk_to_dev(disk)); - blk_mq_freeze_queue_wait(q); - blk_throtl_cancel_bios(disk->queue); blk_sync_queue(q); blk_flush_integrity(); + blk_mq_cancel_work_sync(q); + + blk_mq_quiesce_queue(q); + if (q->elevator) { + mutex_lock(&q->sysfs_lock); + elevator_exit(q); + mutex_unlock(&q->sysfs_lock); + } + rq_qos_exit(q); + blk_mq_unquiesce_queue(q); + /* - * Allow using passthrough request again after the queue is torn down. + * If the disk does not own the queue, allow using passthrough requests + * again. Else leave the queue frozen to fail all I/O. */ - blk_queue_flag_clear(QUEUE_FLAG_INIT_DONE, q); - __blk_mq_unfreeze_queue(q, true); - + if (!test_bit(GD_OWNS_QUEUE, &disk->state)) { + blk_queue_flag_clear(QUEUE_FLAG_INIT_DONE, q); + __blk_mq_unfreeze_queue(q, true); + } else { + if (queue_is_mq(q)) + blk_mq_exit_queue(q); + } } EXPORT_SYMBOL(del_gendisk); @@ -1117,34 +1111,12 @@ static struct attribute_group disk_attr_group = { static const struct attribute_group *disk_attr_groups[] = { &disk_attr_group, +#ifdef CONFIG_BLK_DEV_IO_TRACE + &blk_trace_attr_group, +#endif NULL }; -static void disk_release_mq(struct request_queue *q) -{ - blk_mq_cancel_work_sync(q); - - /* - * There can't be any non non-passthrough bios in flight here, but - * requests stay around longer, including passthrough ones so we - * still need to freeze the queue here. - */ - blk_mq_freeze_queue(q); - - /* - * Since the I/O scheduler exit code may access cgroup information, - * perform I/O scheduler exit before disassociating from the block - * cgroup controller. - */ - if (q->elevator) { - mutex_lock(&q->sysfs_lock); - elevator_exit(q); - mutex_unlock(&q->sysfs_lock); - } - rq_qos_exit(q); - __blk_mq_unfreeze_queue(q, true); -} - /** * disk_release - releases all allocated resources of the gendisk * @dev: the device representing this disk @@ -1166,13 +1138,23 @@ static void disk_release(struct device *dev) might_sleep(); WARN_ON_ONCE(disk_live(disk)); - if (queue_is_mq(disk->queue)) - disk_release_mq(disk->queue); + /* + * To undo the all initialization from blk_mq_init_allocated_queue in + * case of a probe failure where add_disk is never called we have to + * call blk_mq_exit_queue here. We can't do this for the more common + * teardown case (yet) as the tagset can be gone by the time the disk + * is released once it was added. + */ + if (queue_is_mq(disk->queue) && + test_bit(GD_OWNS_QUEUE, &disk->state) && + !test_bit(GD_ADDED, &disk->state)) + blk_mq_exit_queue(disk->queue); blkcg_exit_queue(disk->queue); disk_release_events(disk); kfree(disk->random); + disk_free_zone_bitmaps(disk); xa_destroy(&disk->part_tbl); disk->queue->disk = NULL; @@ -1356,9 +1338,6 @@ struct gendisk *__alloc_disk_node(struct request_queue *q, int node_id, { struct gendisk *disk; - if (!blk_get_queue(q)) - return NULL; - disk = kzalloc_node(sizeof(struct gendisk), GFP_KERNEL, node_id); if (!disk) goto out_put_queue; @@ -1409,7 +1388,6 @@ out_put_queue: blk_put_queue(q); return NULL; } -EXPORT_SYMBOL(__alloc_disk_node); struct gendisk *__blk_alloc_disk(int node, struct lock_class_key *lkclass) { @@ -1422,9 +1400,10 @@ struct gendisk *__blk_alloc_disk(int node, struct lock_class_key *lkclass) disk = __alloc_disk_node(q, node, lkclass); if (!disk) { - blk_cleanup_queue(q); + blk_put_queue(q); return NULL; } + set_bit(GD_OWNS_QUEUE, &disk->state); return disk; } EXPORT_SYMBOL(__blk_alloc_disk); @@ -1436,6 +1415,9 @@ EXPORT_SYMBOL(__blk_alloc_disk); * This decrements the refcount for the struct gendisk. When this reaches 0 * we'll have disk_release() called. * + * Note: for blk-mq disk put_disk must be called before freeing the tag_set + * when handling probe errors (that is before add_disk() is called). + * * Context: Any context, but the last reference must not be dropped from * atomic context. */ @@ -1446,22 +1428,6 @@ void put_disk(struct gendisk *disk) } EXPORT_SYMBOL(put_disk); -/** - * blk_cleanup_disk - shutdown a gendisk allocated by blk_alloc_disk - * @disk: gendisk to shutdown - * - * Mark the queue hanging off @disk DYING, drain all pending requests, then mark - * the queue DEAD, destroy and put it and the gendisk structure. - * - * Context: can sleep - */ -void blk_cleanup_disk(struct gendisk *disk) -{ - blk_cleanup_queue(disk->queue); - put_disk(disk); -} -EXPORT_SYMBOL(blk_cleanup_disk); - static void set_disk_ro_uevent(struct gendisk *gd, int ro) { char event[] = "DISK_RO=1"; |