115 static void nvme_put_subsystem(struct nvme_subsystem *subsys);
571 	ida_simple_remove(&head->subsys->ns_ida, head->instance);  in nvme_free_ns_head()
573 	nvme_put_subsystem(head->subsys);  in nvme_free_ns_head()
1149 		mutex_lock(&ctrl->subsys->lock);  in nvme_passthru_start()
1150 		nvme_mpath_start_freeze(ctrl->subsys);  in nvme_passthru_start()
1151 		nvme_mpath_wait_freeze(ctrl->subsys);  in nvme_passthru_start()
1163 		nvme_mpath_unfreeze(ctrl->subsys);  in nvme_passthru_end()
1164 		mutex_unlock(&ctrl->subsys->lock);  in nvme_passthru_end()
1808 			atomic_bs = (1 + ns->ctrl->subsys->awupf) * bs;  in nvme_update_disk_info()
2503 static void nvme_init_subnqn(struct nvme_subsystem *subsys, struct nvme_ctrl *ctrl,  in nvme_init_subnqn()  argument
2512 			strlcpy(subsys->subnqn, id->subnqn, NVMF_NQN_SIZE);  in nvme_init_subnqn()
2521 	off = snprintf(subsys->subnqn, NVMF_NQN_SIZE,  in nvme_init_subnqn()
2524 	memcpy(subsys->subnqn + off, id->sn, sizeof(id->sn));  in nvme_init_subnqn()
2526 	memcpy(subsys->subnqn + off, id->mn, sizeof(id->mn));  in nvme_init_subnqn()
2528 	memset(subsys->subnqn + off, 0, sizeof(subsys->subnqn) - off);  in nvme_init_subnqn()
2533 	struct nvme_subsystem *subsys =  in nvme_release_subsystem()  local
2536 	if (subsys->instance >= 0)  in nvme_release_subsystem()
2537 		ida_simple_remove(&nvme_instance_ida, subsys->instance);  in nvme_release_subsystem()
2538 	kfree(subsys);  in nvme_release_subsystem()
2543 	struct nvme_subsystem *subsys =  in nvme_destroy_subsystem()  local
2547 	list_del(&subsys->entry);  in nvme_destroy_subsystem()
2550 	ida_destroy(&subsys->ns_ida);  in nvme_destroy_subsystem()
2551 	device_del(&subsys->dev);  in nvme_destroy_subsystem()
2552 	put_device(&subsys->dev);  in nvme_destroy_subsystem()
2555 static void nvme_put_subsystem(struct nvme_subsystem *subsys)  in nvme_put_subsystem()  argument
2557 	kref_put(&subsys->ref, nvme_destroy_subsystem);  in nvme_put_subsystem()
2562 	struct nvme_subsystem *subsys;  in __nvme_find_get_subsystem()  local
2577 	list_for_each_entry(subsys, &nvme_subsystems, entry) {  in __nvme_find_get_subsystem()
2578 		if (strcmp(subsys->subnqn, subsysnqn))  in __nvme_find_get_subsystem()
2580 		if (!kref_get_unless_zero(&subsys->ref))  in __nvme_find_get_subsystem()
2582 		return subsys;  in __nvme_find_get_subsystem()
2596 	struct nvme_subsystem *subsys =  in nvme_subsys_show_nqn()  local
2599 	return sysfs_emit(buf, "%s\n", subsys->subnqn);  in nvme_subsys_show_nqn()
2607 	struct nvme_subsystem *subsys =					\
2610 			   (int)sizeof(subsys->field), subsys->field);	\
2643 static bool nvme_validate_cntlid(struct nvme_subsystem *subsys,  in nvme_validate_cntlid()  argument
2650 	list_for_each_entry(tmp, &subsys->ctrls, subsys_entry) {  in nvme_validate_cntlid()
2675 	struct nvme_subsystem *subsys, *found;  in nvme_init_subsystem()  local
2678 	subsys = kzalloc(sizeof(*subsys), GFP_KERNEL);  in nvme_init_subsystem()
2679 	if (!subsys)  in nvme_init_subsystem()
2682 	subsys->instance = -1;  in nvme_init_subsystem()
2683 	mutex_init(&subsys->lock);  in nvme_init_subsystem()
2684 	kref_init(&subsys->ref);  in nvme_init_subsystem()
2685 	INIT_LIST_HEAD(&subsys->ctrls);  in nvme_init_subsystem()
2686 	INIT_LIST_HEAD(&subsys->nsheads);  in nvme_init_subsystem()
2687 	nvme_init_subnqn(subsys, ctrl, id);  in nvme_init_subsystem()
2688 	memcpy(subsys->serial, id->sn, sizeof(subsys->serial));  in nvme_init_subsystem()
2689 	memcpy(subsys->model, id->mn, sizeof(subsys->model));  in nvme_init_subsystem()
2690 	memcpy(subsys->firmware_rev, id->fr, sizeof(subsys->firmware_rev));  in nvme_init_subsystem()
2691 	subsys->vendor_id = le16_to_cpu(id->vid);  in nvme_init_subsystem()
2692 	subsys->cmic = id->cmic;  in nvme_init_subsystem()
2693 	subsys->awupf = le16_to_cpu(id->awupf);  in nvme_init_subsystem()
2695 	subsys->iopolicy = NVME_IOPOLICY_NUMA;  in nvme_init_subsystem()
2698 	subsys->dev.class = nvme_subsys_class;  in nvme_init_subsystem()
2699 	subsys->dev.release = nvme_release_subsystem;  in nvme_init_subsystem()
2700 	subsys->dev.groups = nvme_subsys_attrs_groups;  in nvme_init_subsystem()
2701 	dev_set_name(&subsys->dev, "nvme-subsys%d", ctrl->instance);  in nvme_init_subsystem()
2702 	device_initialize(&subsys->dev);  in nvme_init_subsystem()
2705 	found = __nvme_find_get_subsystem(subsys->subnqn);  in nvme_init_subsystem()
2707 		put_device(&subsys->dev);  in nvme_init_subsystem()
2708 		subsys = found;  in nvme_init_subsystem()
2710 		if (!nvme_validate_cntlid(subsys, ctrl, id)) {  in nvme_init_subsystem()
2715 		ret = device_add(&subsys->dev);  in nvme_init_subsystem()
2719 			put_device(&subsys->dev);  in nvme_init_subsystem()
2722 		ida_init(&subsys->ns_ida);  in nvme_init_subsystem()
2723 		list_add_tail(&subsys->entry, &nvme_subsystems);  in nvme_init_subsystem()
2726 	ret = sysfs_create_link(&subsys->dev.kobj, &ctrl->device->kobj,  in nvme_init_subsystem()
2735 		subsys->instance = ctrl->instance;  in nvme_init_subsystem()
2736 	ctrl->subsys = subsys;  in nvme_init_subsystem()
2737 	list_add_tail(&ctrl->subsys_entry, &subsys->ctrls);  in nvme_init_subsystem()
2742 	nvme_put_subsystem(subsys);  in nvme_init_subsystem()
3140 	struct nvme_subsystem *subsys = head->subsys;  in wwid_show()  local
3141 	int serial_len = sizeof(subsys->serial);  in wwid_show()
3142 	int model_len = sizeof(subsys->model);  in wwid_show()
3153 	while (serial_len > 0 && (subsys->serial[serial_len - 1] == ' ' ||  in wwid_show()
3154 				  subsys->serial[serial_len - 1] == '\0'))  in wwid_show()
3156 	while (model_len > 0 && (subsys->model[model_len - 1] == ' ' ||  in wwid_show()
3157 				 subsys->model[model_len - 1] == '\0'))  in wwid_show()
3160 	return sysfs_emit(buf, "nvme.%04x-%*phN-%*phN-%08x\n", subsys->vendor_id,  in wwid_show()
3161 		serial_len, subsys->serial, model_len, subsys->model,  in wwid_show()
3263 		(int)sizeof(ctrl->subsys->field), ctrl->subsys->field);		\
3338 	return sysfs_emit(buf, "%s\n", ctrl->subsys->subnqn);  in nvme_sysfs_show_subsysnqn()
3520 static struct nvme_ns_head *nvme_find_ns_head(struct nvme_subsystem *subsys,  in nvme_find_ns_head()  argument
3525 	lockdep_assert_held(&subsys->lock);  in nvme_find_ns_head()
3527 	list_for_each_entry(h, &subsys->nsheads, entry) {  in nvme_find_ns_head()
3537 static int __nvme_check_ids(struct nvme_subsystem *subsys,  in __nvme_check_ids()  argument
3542 	lockdep_assert_held(&subsys->lock);  in __nvme_check_ids()
3544 	list_for_each_entry(h, &subsys->nsheads, entry) {  in __nvme_check_ids()
3632 	ret = ida_simple_get(&ctrl->subsys->ns_ida, 1, 0, GFP_KERNEL);  in nvme_alloc_ns_head()
3640 	head->subsys = ctrl->subsys;  in nvme_alloc_ns_head()
3645 	ret = __nvme_check_ids(ctrl->subsys, head);  in nvme_alloc_ns_head()
3663 	list_add_tail(&head->entry, &ctrl->subsys->nsheads);  in nvme_alloc_ns_head()
3665 	kref_get(&ctrl->subsys->ref);  in nvme_alloc_ns_head()
3671 	ida_simple_remove(&ctrl->subsys->ns_ida, head->instance);  in nvme_alloc_ns_head()
3687 	mutex_lock(&ctrl->subsys->lock);  in nvme_init_ns_head()
3688 	head = nvme_find_ns_head(ctrl->subsys, nsid);  in nvme_init_ns_head()
3713 	mutex_unlock(&ctrl->subsys->lock);  in nvme_init_ns_head()
3719 	mutex_unlock(&ctrl->subsys->lock);  in nvme_init_ns_head()
3831 	mutex_lock(&ctrl->subsys->lock);  in nvme_alloc_ns()
3835 	mutex_unlock(&ctrl->subsys->lock);  in nvme_alloc_ns()
3856 	mutex_lock(&ns->ctrl->subsys->lock);  in nvme_ns_remove()
3862 	mutex_unlock(&ns->ctrl->subsys->lock);  in nvme_ns_remove()
4365 	struct nvme_subsystem *subsys = ctrl->subsys;  in nvme_free_ctrl()  local
4367 	if (!subsys || ctrl->instance != subsys->instance)  in nvme_free_ctrl()
4374 	if (subsys) {  in nvme_free_ctrl()
4377 		sysfs_remove_link(&subsys->dev.kobj, dev_name(ctrl->device));  in nvme_free_ctrl()
4383 	if (subsys)  in nvme_free_ctrl()
4384 		nvme_put_subsystem(subsys);  in nvme_free_ctrl()