Lines Matching refs:head
57 if (!ns->head->disk) { in nvme_mpath_set_disk_name()
59 ns->head->instance); in nvme_mpath_set_disk_name()
63 ns->ctrl->instance, ns->head->instance); in nvme_mpath_set_disk_name()
87 spin_lock_irqsave(&ns->head->requeue_lock, flags); in nvme_failover_req()
89 bio_set_dev(bio, ns->head->disk->part0); in nvme_failover_req()
95 blk_steal_bios(&ns->head->requeue_list, req); in nvme_failover_req()
96 spin_unlock_irqrestore(&ns->head->requeue_lock, flags); in nvme_failover_req()
99 kblockd_schedule_work(&ns->head->requeue_work); in nvme_failover_req()
108 if (!ns->head->disk) in nvme_kick_requeue_lists()
110 kblockd_schedule_work(&ns->head->requeue_work); in nvme_kick_requeue_lists()
112 disk_uevent(ns->head->disk, KOBJ_CHANGE); in nvme_kick_requeue_lists()
128 struct nvme_ns_head *head = ns->head; in nvme_mpath_clear_current_path() local
132 if (!head) in nvme_mpath_clear_current_path()
136 if (ns == rcu_access_pointer(head->current_path[node])) { in nvme_mpath_clear_current_path()
137 rcu_assign_pointer(head->current_path[node], NULL); in nvme_mpath_clear_current_path()
152 kblockd_schedule_work(&ns->head->requeue_work); in nvme_mpath_clear_ctrl_paths()
159 struct nvme_ns_head *head = ns->head; in nvme_mpath_revalidate_paths() local
160 sector_t capacity = get_capacity(head->disk); in nvme_mpath_revalidate_paths()
163 list_for_each_entry_rcu(ns, &head->list, siblings) { in nvme_mpath_revalidate_paths()
169 rcu_assign_pointer(head->current_path[node], NULL); in nvme_mpath_revalidate_paths()
188 static struct nvme_ns *__nvme_find_path(struct nvme_ns_head *head, int node) in __nvme_find_path() argument
193 list_for_each_entry_rcu(ns, &head->list, siblings) { in __nvme_find_path()
197 if (READ_ONCE(head->subsys->iopolicy) == NVME_IOPOLICY_NUMA) in __nvme_find_path()
223 rcu_assign_pointer(head->current_path[node], found); in __nvme_find_path()
227 static struct nvme_ns *nvme_next_ns(struct nvme_ns_head *head, in nvme_next_ns() argument
230 ns = list_next_or_null_rcu(&head->list, &ns->siblings, struct nvme_ns, in nvme_next_ns()
234 return list_first_or_null_rcu(&head->list, struct nvme_ns, siblings); in nvme_next_ns()
237 static struct nvme_ns *nvme_round_robin_path(struct nvme_ns_head *head, in nvme_round_robin_path() argument
242 if (list_is_singular(&head->list)) { in nvme_round_robin_path()
248 for (ns = nvme_next_ns(head, old); in nvme_round_robin_path()
250 ns = nvme_next_ns(head, ns)) { in nvme_round_robin_path()
276 rcu_assign_pointer(head->current_path[node], found); in nvme_round_robin_path()
286 inline struct nvme_ns *nvme_find_path(struct nvme_ns_head *head) in nvme_find_path() argument
291 ns = srcu_dereference(head->current_path[node], &head->srcu); in nvme_find_path()
293 return __nvme_find_path(head, node); in nvme_find_path()
295 if (READ_ONCE(head->subsys->iopolicy) == NVME_IOPOLICY_RR) in nvme_find_path()
296 return nvme_round_robin_path(head, node, ns); in nvme_find_path()
298 return __nvme_find_path(head, node); in nvme_find_path()
302 static bool nvme_available_path(struct nvme_ns_head *head) in nvme_available_path() argument
306 list_for_each_entry_rcu(ns, &head->list, siblings) { in nvme_available_path()
324 struct nvme_ns_head *head = bio->bi_bdev->bd_disk->private_data; in nvme_ns_head_submit_bio() local
325 struct device *dev = disk_to_dev(head->disk); in nvme_ns_head_submit_bio()
336 srcu_idx = srcu_read_lock(&head->srcu); in nvme_ns_head_submit_bio()
337 ns = nvme_find_path(head); in nvme_ns_head_submit_bio()
341 trace_block_bio_remap(bio, disk_devt(ns->head->disk), in nvme_ns_head_submit_bio()
344 } else if (nvme_available_path(head)) { in nvme_ns_head_submit_bio()
347 spin_lock_irq(&head->requeue_lock); in nvme_ns_head_submit_bio()
348 bio_list_add(&head->requeue_list, bio); in nvme_ns_head_submit_bio()
349 spin_unlock_irq(&head->requeue_lock); in nvme_ns_head_submit_bio()
357 srcu_read_unlock(&head->srcu, srcu_idx); in nvme_ns_head_submit_bio()
376 struct nvme_ns_head *head = disk->private_data; in nvme_ns_head_report_zones() local
380 srcu_idx = srcu_read_lock(&head->srcu); in nvme_ns_head_report_zones()
381 ns = nvme_find_path(head); in nvme_ns_head_report_zones()
384 srcu_read_unlock(&head->srcu, srcu_idx); in nvme_ns_head_report_zones()
428 static int nvme_add_ns_head_cdev(struct nvme_ns_head *head) in nvme_add_ns_head_cdev() argument
432 head->cdev_device.parent = &head->subsys->dev; in nvme_add_ns_head_cdev()
433 ret = dev_set_name(&head->cdev_device, "ng%dn%d", in nvme_add_ns_head_cdev()
434 head->subsys->instance, head->instance); in nvme_add_ns_head_cdev()
437 ret = nvme_cdev_add(&head->cdev, &head->cdev_device, in nvme_add_ns_head_cdev()
444 struct nvme_ns_head *head = in nvme_requeue_work() local
448 spin_lock_irq(&head->requeue_lock); in nvme_requeue_work()
449 next = bio_list_get(&head->requeue_list); in nvme_requeue_work()
450 spin_unlock_irq(&head->requeue_lock); in nvme_requeue_work()
460 int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl, struct nvme_ns_head *head) in nvme_mpath_alloc_disk() argument
464 mutex_init(&head->lock); in nvme_mpath_alloc_disk()
465 bio_list_init(&head->requeue_list); in nvme_mpath_alloc_disk()
466 spin_lock_init(&head->requeue_lock); in nvme_mpath_alloc_disk()
467 INIT_WORK(&head->requeue_work, nvme_requeue_work); in nvme_mpath_alloc_disk()
477 head->disk = blk_alloc_disk(ctrl->numa_node); in nvme_mpath_alloc_disk()
478 if (!head->disk) in nvme_mpath_alloc_disk()
480 head->disk->fops = &nvme_ns_head_ops; in nvme_mpath_alloc_disk()
481 head->disk->private_data = head; in nvme_mpath_alloc_disk()
482 sprintf(head->disk->disk_name, "nvme%dn%d", in nvme_mpath_alloc_disk()
483 ctrl->subsys->instance, head->instance); in nvme_mpath_alloc_disk()
485 blk_queue_flag_set(QUEUE_FLAG_NONROT, head->disk->queue); in nvme_mpath_alloc_disk()
486 blk_queue_flag_set(QUEUE_FLAG_NOWAIT, head->disk->queue); in nvme_mpath_alloc_disk()
495 blk_queue_flag_set(QUEUE_FLAG_POLL, head->disk->queue); in nvme_mpath_alloc_disk()
498 blk_queue_logical_block_size(head->disk->queue, 512); in nvme_mpath_alloc_disk()
499 blk_set_stacking_limits(&head->disk->queue->limits); in nvme_mpath_alloc_disk()
504 blk_queue_write_cache(head->disk->queue, vwc, vwc); in nvme_mpath_alloc_disk()
510 struct nvme_ns_head *head = ns->head; in nvme_mpath_set_live() local
513 if (!head->disk) in nvme_mpath_set_live()
521 if (!test_and_set_bit(NVME_NSHEAD_DISK_LIVE, &head->flags)) { in nvme_mpath_set_live()
522 rc = device_add_disk(&head->subsys->dev, head->disk, in nvme_mpath_set_live()
528 nvme_add_ns_head_cdev(head); in nvme_mpath_set_live()
531 mutex_lock(&head->lock); in nvme_mpath_set_live()
535 srcu_idx = srcu_read_lock(&head->srcu); in nvme_mpath_set_live()
537 __nvme_find_path(head, node); in nvme_mpath_set_live()
538 srcu_read_unlock(&head->srcu, srcu_idx); in nvme_mpath_set_live()
540 mutex_unlock(&head->lock); in nvme_mpath_set_live()
542 synchronize_srcu(&head->srcu); in nvme_mpath_set_live()
543 kblockd_schedule_work(&head->requeue_work); in nvme_mpath_set_live()
628 if (ns->head->ns_id < nsid) in nvme_update_ana_state()
630 if (ns->head->ns_id == nsid) in nvme_update_ana_state()
634 if (ns->head->ns_id > nsid) in nvme_update_ana_state()
796 if (blk_queue_stable_writes(ns->queue) && ns->head->disk) in nvme_mpath_add_disk()
798 ns->head->disk->queue); in nvme_mpath_add_disk()
800 if (blk_queue_is_zoned(ns->queue) && ns->head->disk) in nvme_mpath_add_disk()
801 ns->head->disk->queue->nr_zones = ns->queue->nr_zones; in nvme_mpath_add_disk()
805 void nvme_mpath_shutdown_disk(struct nvme_ns_head *head) in nvme_mpath_shutdown_disk() argument
807 if (!head->disk) in nvme_mpath_shutdown_disk()
809 kblockd_schedule_work(&head->requeue_work); in nvme_mpath_shutdown_disk()
810 if (test_bit(NVME_NSHEAD_DISK_LIVE, &head->flags)) { in nvme_mpath_shutdown_disk()
811 nvme_cdev_del(&head->cdev, &head->cdev_device); in nvme_mpath_shutdown_disk()
812 del_gendisk(head->disk); in nvme_mpath_shutdown_disk()
816 void nvme_mpath_remove_disk(struct nvme_ns_head *head) in nvme_mpath_remove_disk() argument
818 if (!head->disk) in nvme_mpath_remove_disk()
820 blk_set_queue_dying(head->disk->queue); in nvme_mpath_remove_disk()
822 kblockd_schedule_work(&head->requeue_work); in nvme_mpath_remove_disk()
823 flush_work(&head->requeue_work); in nvme_mpath_remove_disk()
824 blk_cleanup_disk(head->disk); in nvme_mpath_remove_disk()