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nvme: don't call revalidate_disk from nvme_set_queue_dying 

In nvme_set_queue_dying we really just want to ensure the disk and bdev
sizes are set to zero.  Going through revalidate_disk leads to a somewhat
arcance and complex callchain relying on special behavior in a few
places.  Instead just lift the set_capacity directly to
nvme_set_queue_dying, and rename and move the nvme_mpath_update_disk_size
helper so that we can use it in nvme_set_queue_dying to propagate the
size to the bdev without detours.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2020-08-23 11:10:43 +02:00 committed by Jens Axboe
parent c2b4bb8cb3
commit c13f0fbc4c
2 changed files with 23 additions and 23 deletions
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33
drivers/nvme/host/core.c
View File

@ -94,21 +94,34 @@ static void nvme_put_subsystem(struct nvme_subsystem *subsys);
static void nvme_remove_invalid_namespaces(struct nvme_ctrl *ctrl,
unsigned nsid);
static void nvme_update_bdev_size(struct gendisk *disk)
{
struct block_device *bdev = bdget_disk(disk, 0);
if (bdev) {
bd_set_nr_sectors(bdev, get_capacity(disk));
bdput(bdev);
}
}
/*
* Prepare a queue for teardown.
*
* This must forcibly unquiesce queues to avoid blocking dispatch, and only set
* the capacity to 0 after that to avoid blocking dispatchers that may be
* holding bd_butex. This will end buffered writers dirtying pages that can't
* be synced.
*/
static void nvme_set_queue_dying(struct nvme_ns *ns)
{
/*
* Revalidating a dead namespace sets capacity to 0. This will end
* buffered writers dirtying pages that can't be synced.
*/
if (test_and_set_bit(NVME_NS_DEAD, &ns->flags))
return;
blk_set_queue_dying(ns->queue);
/* Forcibly unquiesce queues to avoid blocking dispatch */
blk_mq_unquiesce_queue(ns->queue);
/*
* Revalidate after unblocking dispatchers that may be holding bd_butex
*/
revalidate_disk(ns->disk);
set_capacity(ns->disk, 0);
nvme_update_bdev_size(ns->disk);
}
static void nvme_queue_scan(struct nvme_ctrl *ctrl)
@ -2134,7 +2147,7 @@ static int __nvme_revalidate_disk(struct gendisk *disk, struct nvme_id_ns *id)
nvme_update_disk_info(ns->head->disk, ns, id);
blk_stack_limits(&ns->head->disk->queue->limits,
&ns->queue->limits, 0);
nvme_mpath_update_disk_size(ns->head->disk);
nvme_update_bdev_size(ns->head->disk);
}
#endif
return 0;

13
drivers/nvme/host/nvme.h
View File

@ -683,16 +683,6 @@ static inline void nvme_trace_bio_complete(struct request *req,
trace_block_bio_complete(ns->head->disk->queue, req->bio);
}
static inline void nvme_mpath_update_disk_size(struct gendisk *disk)
{
struct block_device *bdev = bdget_disk(disk, 0);
if (bdev) {
bd_set_nr_sectors(bdev, get_capacity(disk));
bdput(bdev);
}
}
extern struct device_attribute dev_attr_ana_grpid;
extern struct device_attribute dev_attr_ana_state;
extern struct device_attribute subsys_attr_iopolicy;
@ -767,9 +757,6 @@ static inline void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys)
static inline void nvme_mpath_start_freeze(struct nvme_subsystem *subsys)
{
}
static inline void nvme_mpath_update_disk_size(struct gendisk *disk)
{
}
#endif /* CONFIG_NVME_MULTIPATH */
#ifdef CONFIG_BLK_DEV_ZONED