92 static void nvme_put_subsystem(struct nvme_subsystem *subsys);
482 	ida_simple_remove(&head->subsys->ns_ida, head->instance);  in nvme_free_ns_head()
484 	nvme_put_subsystem(head->subsys);  in nvme_free_ns_head()
1017 		mutex_lock(&ctrl->subsys->lock);  in nvme_passthru_start()
1018 		nvme_mpath_start_freeze(ctrl->subsys);  in nvme_passthru_start()
1019 		nvme_mpath_wait_freeze(ctrl->subsys);  in nvme_passthru_start()
1030 		nvme_mpath_unfreeze(ctrl->subsys);  in nvme_passthru_end()
1031 		mutex_unlock(&ctrl->subsys->lock);  in nvme_passthru_end()
2021 			atomic_bs = (1 + ns->ctrl->subsys->awupf) * bs;  in nvme_update_disk_info()
2670 static void nvme_init_subnqn(struct nvme_subsystem *subsys, struct nvme_ctrl *ctrl,  in nvme_init_subnqn()  argument
2679 			strlcpy(subsys->subnqn, id->subnqn, NVMF_NQN_SIZE);  in nvme_init_subnqn()
2688 	off = snprintf(subsys->subnqn, NVMF_NQN_SIZE,  in nvme_init_subnqn()
2691 	memcpy(subsys->subnqn + off, id->sn, sizeof(id->sn));  in nvme_init_subnqn()
2693 	memcpy(subsys->subnqn + off, id->mn, sizeof(id->mn));  in nvme_init_subnqn()
2695 	memset(subsys->subnqn + off, 0, sizeof(subsys->subnqn) - off);  in nvme_init_subnqn()
2700 	struct nvme_subsystem *subsys =  in nvme_release_subsystem()  local
2703 	if (subsys->instance >= 0)  in nvme_release_subsystem()
2704 		ida_simple_remove(&nvme_instance_ida, subsys->instance);  in nvme_release_subsystem()
2705 	kfree(subsys);  in nvme_release_subsystem()
2710 	struct nvme_subsystem *subsys =  in nvme_destroy_subsystem()  local
2714 	list_del(&subsys->entry);  in nvme_destroy_subsystem()
2717 	ida_destroy(&subsys->ns_ida);  in nvme_destroy_subsystem()
2718 	device_del(&subsys->dev);  in nvme_destroy_subsystem()
2719 	put_device(&subsys->dev);  in nvme_destroy_subsystem()
2722 static void nvme_put_subsystem(struct nvme_subsystem *subsys)  in nvme_put_subsystem()  argument
2724 	kref_put(&subsys->ref, nvme_destroy_subsystem);  in nvme_put_subsystem()
2729 	struct nvme_subsystem *subsys;  in __nvme_find_get_subsystem()  local
2744 	list_for_each_entry(subsys, &nvme_subsystems, entry) {  in __nvme_find_get_subsystem()
2745 		if (strcmp(subsys->subnqn, subsysnqn))  in __nvme_find_get_subsystem()
2747 		if (!kref_get_unless_zero(&subsys->ref))  in __nvme_find_get_subsystem()
2749 		return subsys;  in __nvme_find_get_subsystem()
2763 	struct nvme_subsystem *subsys =  in nvme_subsys_show_nqn()  local
2766 	return snprintf(buf, PAGE_SIZE, "%s\n", subsys->subnqn);  in nvme_subsys_show_nqn()
2774 	struct nvme_subsystem *subsys =					\
2777 		       (int)sizeof(subsys->field), subsys->field);	\
2805 static bool nvme_validate_cntlid(struct nvme_subsystem *subsys,  in nvme_validate_cntlid()  argument
2812 	list_for_each_entry(tmp, &subsys->ctrls, subsys_entry) {  in nvme_validate_cntlid()
2837 	struct nvme_subsystem *subsys, *found;  in nvme_init_subsystem()  local
2840 	subsys = kzalloc(sizeof(*subsys), GFP_KERNEL);  in nvme_init_subsystem()
2841 	if (!subsys)  in nvme_init_subsystem()
2844 	subsys->instance = -1;  in nvme_init_subsystem()
2845 	mutex_init(&subsys->lock);  in nvme_init_subsystem()
2846 	kref_init(&subsys->ref);  in nvme_init_subsystem()
2847 	INIT_LIST_HEAD(&subsys->ctrls);  in nvme_init_subsystem()
2848 	INIT_LIST_HEAD(&subsys->nsheads);  in nvme_init_subsystem()
2849 	nvme_init_subnqn(subsys, ctrl, id);  in nvme_init_subsystem()
2850 	memcpy(subsys->serial, id->sn, sizeof(subsys->serial));  in nvme_init_subsystem()
2851 	memcpy(subsys->model, id->mn, sizeof(subsys->model));  in nvme_init_subsystem()
2852 	memcpy(subsys->firmware_rev, id->fr, sizeof(subsys->firmware_rev));  in nvme_init_subsystem()
2853 	subsys->vendor_id = le16_to_cpu(id->vid);  in nvme_init_subsystem()
2854 	subsys->cmic = id->cmic;  in nvme_init_subsystem()
2855 	subsys->awupf = le16_to_cpu(id->awupf);  in nvme_init_subsystem()
2857 	subsys->iopolicy = NVME_IOPOLICY_NUMA;  in nvme_init_subsystem()
2860 	subsys->dev.class = nvme_subsys_class;  in nvme_init_subsystem()
2861 	subsys->dev.release = nvme_release_subsystem;  in nvme_init_subsystem()
2862 	subsys->dev.groups = nvme_subsys_attrs_groups;  in nvme_init_subsystem()
2863 	dev_set_name(&subsys->dev, "nvme-subsys%d", ctrl->instance);  in nvme_init_subsystem()
2864 	device_initialize(&subsys->dev);  in nvme_init_subsystem()
2867 	found = __nvme_find_get_subsystem(subsys->subnqn);  in nvme_init_subsystem()
2869 		put_device(&subsys->dev);  in nvme_init_subsystem()
2870 		subsys = found;  in nvme_init_subsystem()
2872 		if (!nvme_validate_cntlid(subsys, ctrl, id)) {  in nvme_init_subsystem()
2877 		ret = device_add(&subsys->dev);  in nvme_init_subsystem()
2881 			put_device(&subsys->dev);  in nvme_init_subsystem()
2884 		ida_init(&subsys->ns_ida);  in nvme_init_subsystem()
2885 		list_add_tail(&subsys->entry, &nvme_subsystems);  in nvme_init_subsystem()
2888 	ret = sysfs_create_link(&subsys->dev.kobj, &ctrl->device->kobj,  in nvme_init_subsystem()
2897 		subsys->instance = ctrl->instance;  in nvme_init_subsystem()
2898 	ctrl->subsys = subsys;  in nvme_init_subsystem()
2899 	list_add_tail(&ctrl->subsys_entry, &subsys->ctrls);  in nvme_init_subsystem()
2904 	nvme_put_subsystem(subsys);  in nvme_init_subsystem()
3288 	struct nvme_subsystem *subsys = head->subsys;  in wwid_show()  local
3289 	int serial_len = sizeof(subsys->serial);  in wwid_show()
3290 	int model_len = sizeof(subsys->model);  in wwid_show()
3301 	while (serial_len > 0 && (subsys->serial[serial_len - 1] == ' ' ||  in wwid_show()
3302 				  subsys->serial[serial_len - 1] == '\0'))  in wwid_show()
3304 	while (model_len > 0 && (subsys->model[model_len - 1] == ' ' ||  in wwid_show()
3305 				 subsys->model[model_len - 1] == '\0'))  in wwid_show()
3308 	return sprintf(buf, "nvme.%04x-%*phN-%*phN-%08x\n", subsys->vendor_id,  in wwid_show()
3309 		serial_len, subsys->serial, model_len, subsys->model,  in wwid_show()
3414 		(int)sizeof(ctrl->subsys->field), ctrl->subsys->field);		\
3488 	return snprintf(buf, PAGE_SIZE, "%s\n", ctrl->subsys->subnqn);  in nvme_sysfs_show_subsysnqn()
3636 static struct nvme_ns_head *nvme_find_ns_head(struct nvme_subsystem *subsys,  in nvme_find_ns_head()  argument
3641 	lockdep_assert_held(&subsys->lock);  in nvme_find_ns_head()
3643 	list_for_each_entry(h, &subsys->nsheads, entry) {  in nvme_find_ns_head()
3651 static int __nvme_check_ids(struct nvme_subsystem *subsys,  in __nvme_check_ids()  argument
3656 	lockdep_assert_held(&subsys->lock);  in __nvme_check_ids()
3658 	list_for_each_entry(h, &subsys->nsheads, entry) {  in __nvme_check_ids()
3681 	ret = ida_simple_get(&ctrl->subsys->ns_ida, 1, 0, GFP_KERNEL);  in nvme_alloc_ns_head()
3689 	head->subsys = ctrl->subsys;  in nvme_alloc_ns_head()
3694 	ret = __nvme_check_ids(ctrl->subsys, head);  in nvme_alloc_ns_head()
3712 	list_add_tail(&head->entry, &ctrl->subsys->nsheads);  in nvme_alloc_ns_head()
3714 	kref_get(&ctrl->subsys->ref);  in nvme_alloc_ns_head()
3720 	ida_simple_remove(&ctrl->subsys->ns_ida, head->instance);  in nvme_alloc_ns_head()
3736 	mutex_lock(&ctrl->subsys->lock);  in nvme_init_ns_head()
3737 	head = nvme_find_ns_head(ctrl->subsys, nsid);  in nvme_init_ns_head()
3762 	mutex_unlock(&ctrl->subsys->lock);  in nvme_init_ns_head()
3768 	mutex_unlock(&ctrl->subsys->lock);  in nvme_init_ns_head()
3876 	mutex_lock(&ctrl->subsys->lock);  in nvme_alloc_ns()
3880 	mutex_unlock(&ctrl->subsys->lock);  in nvme_alloc_ns()
3898 	mutex_lock(&ns->ctrl->subsys->lock);  in nvme_ns_remove()
3902 	mutex_unlock(&ns->ctrl->subsys->lock);  in nvme_ns_remove()
4393 	struct nvme_subsystem *subsys = ctrl->subsys;  in nvme_free_ctrl()  local
4395 	if (!subsys || ctrl->instance != subsys->instance)  in nvme_free_ctrl()
4402 	if (subsys) {  in nvme_free_ctrl()
4405 		sysfs_remove_link(&subsys->dev.kobj, dev_name(ctrl->device));  in nvme_free_ctrl()
4411 	if (subsys)  in nvme_free_ctrl()
4412 		nvme_put_subsystem(subsys);  in nvme_free_ctrl()