123 static void nvme_put_subsystem(struct nvme_subsystem *subsys);
630 	ida_free(&head->subsys->ns_ida, head->instance);  in nvme_free_ns_head()
632 	nvme_put_subsystem(head->subsys);  in nvme_free_ns_head()
1119 		mutex_lock(&ctrl->subsys->lock);  in nvme_passthru_start()
1120 		nvme_mpath_start_freeze(ctrl->subsys);  in nvme_passthru_start()
1121 		nvme_mpath_wait_freeze(ctrl->subsys);  in nvme_passthru_start()
1134 		nvme_mpath_unfreeze(ctrl->subsys);  in nvme_passthru_end()
1135 		mutex_unlock(&ctrl->subsys->lock);  in nvme_passthru_end()
1918 			atomic_bs = (1 + ns->ctrl->subsys->awupf) * bs;  in nvme_update_disk_info()
2643 static void nvme_init_subnqn(struct nvme_subsystem *subsys, struct nvme_ctrl *ctrl,  in nvme_init_subnqn()  argument
2652 			strscpy(subsys->subnqn, id->subnqn, NVMF_NQN_SIZE);  in nvme_init_subnqn()
2665 	off = snprintf(subsys->subnqn, NVMF_NQN_SIZE,  in nvme_init_subnqn()
2668 	memcpy(subsys->subnqn + off, id->sn, sizeof(id->sn));  in nvme_init_subnqn()
2670 	memcpy(subsys->subnqn + off, id->mn, sizeof(id->mn));  in nvme_init_subnqn()
2672 	memset(subsys->subnqn + off, 0, sizeof(subsys->subnqn) - off);  in nvme_init_subnqn()
2677 	struct nvme_subsystem *subsys =  in nvme_release_subsystem()  local
2680 	if (subsys->instance >= 0)  in nvme_release_subsystem()
2681 		ida_free(&nvme_instance_ida, subsys->instance);  in nvme_release_subsystem()
2682 	kfree(subsys);  in nvme_release_subsystem()
2687 	struct nvme_subsystem *subsys =  in nvme_destroy_subsystem()  local
2691 	list_del(&subsys->entry);  in nvme_destroy_subsystem()
2694 	ida_destroy(&subsys->ns_ida);  in nvme_destroy_subsystem()
2695 	device_del(&subsys->dev);  in nvme_destroy_subsystem()
2696 	put_device(&subsys->dev);  in nvme_destroy_subsystem()
2699 static void nvme_put_subsystem(struct nvme_subsystem *subsys)  in nvme_put_subsystem()  argument
2701 	kref_put(&subsys->ref, nvme_destroy_subsystem);  in nvme_put_subsystem()
2706 	struct nvme_subsystem *subsys;  in __nvme_find_get_subsystem()  local
2721 	list_for_each_entry(subsys, &nvme_subsystems, entry) {  in __nvme_find_get_subsystem()
2722 		if (strcmp(subsys->subnqn, subsysnqn))  in __nvme_find_get_subsystem()
2724 		if (!kref_get_unless_zero(&subsys->ref))  in __nvme_find_get_subsystem()
2726 		return subsys;  in __nvme_find_get_subsystem()
2737 static bool nvme_validate_cntlid(struct nvme_subsystem *subsys,  in nvme_validate_cntlid()  argument
2744 	list_for_each_entry(tmp, &subsys->ctrls, subsys_entry) {  in nvme_validate_cntlid()
2752 				subsys->subnqn);  in nvme_validate_cntlid()
2770 	struct nvme_subsystem *subsys, *found;  in nvme_init_subsystem()  local
2773 	subsys = kzalloc(sizeof(*subsys), GFP_KERNEL);  in nvme_init_subsystem()
2774 	if (!subsys)  in nvme_init_subsystem()
2777 	subsys->instance = -1;  in nvme_init_subsystem()
2778 	mutex_init(&subsys->lock);  in nvme_init_subsystem()
2779 	kref_init(&subsys->ref);  in nvme_init_subsystem()
2780 	INIT_LIST_HEAD(&subsys->ctrls);  in nvme_init_subsystem()
2781 	INIT_LIST_HEAD(&subsys->nsheads);  in nvme_init_subsystem()
2782 	nvme_init_subnqn(subsys, ctrl, id);  in nvme_init_subsystem()
2783 	memcpy(subsys->serial, id->sn, sizeof(subsys->serial));  in nvme_init_subsystem()
2784 	memcpy(subsys->model, id->mn, sizeof(subsys->model));  in nvme_init_subsystem()
2785 	subsys->vendor_id = le16_to_cpu(id->vid);  in nvme_init_subsystem()
2786 	subsys->cmic = id->cmic;  in nvme_init_subsystem()
2790 	    !strcmp(subsys->subnqn, NVME_DISC_SUBSYS_NAME))  in nvme_init_subsystem()
2791 		subsys->subtype = NVME_NQN_DISC;  in nvme_init_subsystem()
2793 		subsys->subtype = NVME_NQN_NVME;  in nvme_init_subsystem()
2795 	if (nvme_discovery_ctrl(ctrl) && subsys->subtype != NVME_NQN_DISC) {  in nvme_init_subsystem()
2798 			subsys->subnqn);  in nvme_init_subsystem()
2799 		kfree(subsys);  in nvme_init_subsystem()
2802 	subsys->awupf = le16_to_cpu(id->awupf);  in nvme_init_subsystem()
2803 	nvme_mpath_default_iopolicy(subsys);  in nvme_init_subsystem()
2805 	subsys->dev.class = nvme_subsys_class;  in nvme_init_subsystem()
2806 	subsys->dev.release = nvme_release_subsystem;  in nvme_init_subsystem()
2807 	subsys->dev.groups = nvme_subsys_attrs_groups;  in nvme_init_subsystem()
2808 	dev_set_name(&subsys->dev, "nvme-subsys%d", ctrl->instance);  in nvme_init_subsystem()
2809 	device_initialize(&subsys->dev);  in nvme_init_subsystem()
2812 	found = __nvme_find_get_subsystem(subsys->subnqn);  in nvme_init_subsystem()
2814 		put_device(&subsys->dev);  in nvme_init_subsystem()
2815 		subsys = found;  in nvme_init_subsystem()
2817 		if (!nvme_validate_cntlid(subsys, ctrl, id)) {  in nvme_init_subsystem()
2822 		ret = device_add(&subsys->dev);  in nvme_init_subsystem()
2826 			put_device(&subsys->dev);  in nvme_init_subsystem()
2829 		ida_init(&subsys->ns_ida);  in nvme_init_subsystem()
2830 		list_add_tail(&subsys->entry, &nvme_subsystems);  in nvme_init_subsystem()
2833 	ret = sysfs_create_link(&subsys->dev.kobj, &ctrl->device->kobj,  in nvme_init_subsystem()
2842 		subsys->instance = ctrl->instance;  in nvme_init_subsystem()
2843 	ctrl->subsys = subsys;  in nvme_init_subsystem()
2844 	list_add_tail(&ctrl->subsys_entry, &subsys->ctrls);  in nvme_init_subsystem()
2849 	nvme_put_subsystem(subsys);  in nvme_init_subsystem()
2935 	if (ctrl->subsys->subtype != NVME_NQN_NVME ||  in nvme_init_non_mdts_limits()
3061 	memcpy(ctrl->subsys->firmware_rev, id->fr,  in nvme_init_identify()
3062 	       sizeof(ctrl->subsys->firmware_rev));  in nvme_init_identify()
3274 	lockdep_assert_held(&ctrl->subsys->lock);  in nvme_find_ns_head()
3276 	list_for_each_entry(h, &ctrl->subsys->nsheads, entry) {  in nvme_find_ns_head()
3291 static int nvme_subsys_check_duplicate_ids(struct nvme_subsystem *subsys,  in nvme_subsys_check_duplicate_ids()  argument
3299 	lockdep_assert_held(&subsys->lock);  in nvme_subsys_check_duplicate_ids()
3301 	list_for_each_entry(h, &subsys->nsheads, entry) {  in nvme_subsys_check_duplicate_ids()
3396 	ret = ida_alloc_min(&ctrl->subsys->ns_ida, 1, GFP_KERNEL);  in nvme_alloc_ns_head()
3404 	head->subsys = ctrl->subsys;  in nvme_alloc_ns_head()
3421 	list_add_tail(&head->entry, &ctrl->subsys->nsheads);  in nvme_alloc_ns_head()
3423 	kref_get(&ctrl->subsys->ref);  in nvme_alloc_ns_head()
3429 	ida_free(&ctrl->subsys->ns_ida, head->instance);  in nvme_alloc_ns_head()
3470 	ret = nvme_global_check_duplicate_ids(ctrl->subsys, &info->ids);  in nvme_init_ns_head()
3490 		    ((ns->ctrl->subsys->cmic & NVME_CTRL_CMIC_MULTI_CTRL) &&  in nvme_init_ns_head()
3508 	mutex_lock(&ctrl->subsys->lock);  in nvme_init_ns_head()
3511 		ret = nvme_subsys_check_duplicate_ids(ctrl->subsys, &info->ids);  in nvme_init_ns_head()
3549 	mutex_unlock(&ctrl->subsys->lock);  in nvme_init_ns_head()
3555 	mutex_unlock(&ctrl->subsys->lock);  in nvme_init_ns_head()
3640 		sprintf(disk->disk_name, "nvme%dc%dn%d", ctrl->subsys->instance,  in nvme_alloc_ns()
3644 		sprintf(disk->disk_name, "nvme%dn%d", ctrl->subsys->instance,  in nvme_alloc_ns()
3684 	mutex_lock(&ctrl->subsys->lock);  in nvme_alloc_ns()
3688 	mutex_unlock(&ctrl->subsys->lock);  in nvme_alloc_ns()
3717 	mutex_lock(&ns->ctrl->subsys->lock);  in nvme_ns_remove()
3723 	mutex_unlock(&ns->ctrl->subsys->lock);  in nvme_ns_remove()
4429 	struct nvme_subsystem *subsys = ctrl->subsys;  in nvme_free_ctrl()  local
4431 	if (!subsys || ctrl->instance != subsys->instance)  in nvme_free_ctrl()
4441 	if (subsys) {  in nvme_free_ctrl()
4444 		sysfs_remove_link(&subsys->dev.kobj, dev_name(ctrl->device));  in nvme_free_ctrl()
4450 	if (subsys)  in nvme_free_ctrl()
4451 		nvme_put_subsystem(subsys);  in nvme_free_ctrl()