122 static void nvme_put_subsystem(struct nvme_subsystem *subsys);
618 	ida_free(&head->subsys->ns_ida, head->instance);  in nvme_free_ns_head()
620 	nvme_put_subsystem(head->subsys);  in nvme_free_ns_head()
1105 		mutex_lock(&ctrl->subsys->lock);  in nvme_passthru_start()
1106 		nvme_mpath_start_freeze(ctrl->subsys);  in nvme_passthru_start()
1107 		nvme_mpath_wait_freeze(ctrl->subsys);  in nvme_passthru_start()
1119 		nvme_mpath_unfreeze(ctrl->subsys);  in nvme_passthru_end()
1120 		mutex_unlock(&ctrl->subsys->lock);  in nvme_passthru_end()
1869 			atomic_bs = (1 + ns->ctrl->subsys->awupf) * bs;  in nvme_update_disk_info()
2686 static void nvme_init_subnqn(struct nvme_subsystem *subsys, struct nvme_ctrl *ctrl,  in nvme_init_subnqn()  argument
2695 			strscpy(subsys->subnqn, id->subnqn, NVMF_NQN_SIZE);  in nvme_init_subnqn()
2708 	off = snprintf(subsys->subnqn, NVMF_NQN_SIZE,  in nvme_init_subnqn()
2711 	memcpy(subsys->subnqn + off, id->sn, sizeof(id->sn));  in nvme_init_subnqn()
2713 	memcpy(subsys->subnqn + off, id->mn, sizeof(id->mn));  in nvme_init_subnqn()
2715 	memset(subsys->subnqn + off, 0, sizeof(subsys->subnqn) - off);  in nvme_init_subnqn()
2720 	struct nvme_subsystem *subsys =  in nvme_release_subsystem()  local
2723 	if (subsys->instance >= 0)  in nvme_release_subsystem()
2724 		ida_free(&nvme_instance_ida, subsys->instance);  in nvme_release_subsystem()
2725 	kfree(subsys);  in nvme_release_subsystem()
2730 	struct nvme_subsystem *subsys =  in nvme_destroy_subsystem()  local
2734 	list_del(&subsys->entry);  in nvme_destroy_subsystem()
2737 	ida_destroy(&subsys->ns_ida);  in nvme_destroy_subsystem()
2738 	device_del(&subsys->dev);  in nvme_destroy_subsystem()
2739 	put_device(&subsys->dev);  in nvme_destroy_subsystem()
2742 static void nvme_put_subsystem(struct nvme_subsystem *subsys)  in nvme_put_subsystem()  argument
2744 	kref_put(&subsys->ref, nvme_destroy_subsystem);  in nvme_put_subsystem()
2749 	struct nvme_subsystem *subsys;  in __nvme_find_get_subsystem()  local
2764 	list_for_each_entry(subsys, &nvme_subsystems, entry) {  in __nvme_find_get_subsystem()
2765 		if (strcmp(subsys->subnqn, subsysnqn))  in __nvme_find_get_subsystem()
2767 		if (!kref_get_unless_zero(&subsys->ref))  in __nvme_find_get_subsystem()
2769 		return subsys;  in __nvme_find_get_subsystem()
2783 	struct nvme_subsystem *subsys =  in nvme_subsys_show_nqn()  local
2786 	return sysfs_emit(buf, "%s\n", subsys->subnqn);  in nvme_subsys_show_nqn()
2794 	struct nvme_subsystem *subsys =  in nvme_subsys_show_type()  local
2797 	switch (subsys->subtype) {  in nvme_subsys_show_type()
2812 	struct nvme_subsystem *subsys =					\
2815 			   (int)sizeof(subsys->field), subsys->field);	\
2849 static bool nvme_validate_cntlid(struct nvme_subsystem *subsys,  in nvme_validate_cntlid()  argument
2856 	list_for_each_entry(tmp, &subsys->ctrls, subsys_entry) {  in nvme_validate_cntlid()
2862 				"Duplicate cntlid %u with %s, subsys %s, rejecting\n",  in nvme_validate_cntlid()
2864 				subsys->subnqn);  in nvme_validate_cntlid()
2882 	struct nvme_subsystem *subsys, *found;  in nvme_init_subsystem()  local
2885 	subsys = kzalloc(sizeof(*subsys), GFP_KERNEL);  in nvme_init_subsystem()
2886 	if (!subsys)  in nvme_init_subsystem()
2889 	subsys->instance = -1;  in nvme_init_subsystem()
2890 	mutex_init(&subsys->lock);  in nvme_init_subsystem()
2891 	kref_init(&subsys->ref);  in nvme_init_subsystem()
2892 	INIT_LIST_HEAD(&subsys->ctrls);  in nvme_init_subsystem()
2893 	INIT_LIST_HEAD(&subsys->nsheads);  in nvme_init_subsystem()
2894 	nvme_init_subnqn(subsys, ctrl, id);  in nvme_init_subsystem()
2895 	memcpy(subsys->serial, id->sn, sizeof(subsys->serial));  in nvme_init_subsystem()
2896 	memcpy(subsys->model, id->mn, sizeof(subsys->model));  in nvme_init_subsystem()
2897 	subsys->vendor_id = le16_to_cpu(id->vid);  in nvme_init_subsystem()
2898 	subsys->cmic = id->cmic;  in nvme_init_subsystem()
2902 	    !strcmp(subsys->subnqn, NVME_DISC_SUBSYS_NAME))  in nvme_init_subsystem()
2903 		subsys->subtype = NVME_NQN_DISC;  in nvme_init_subsystem()
2905 		subsys->subtype = NVME_NQN_NVME;  in nvme_init_subsystem()
2907 	if (nvme_discovery_ctrl(ctrl) && subsys->subtype != NVME_NQN_DISC) {  in nvme_init_subsystem()
2910 			subsys->subnqn);  in nvme_init_subsystem()
2911 		kfree(subsys);  in nvme_init_subsystem()
2914 	subsys->awupf = le16_to_cpu(id->awupf);  in nvme_init_subsystem()
2915 	nvme_mpath_default_iopolicy(subsys);  in nvme_init_subsystem()
2917 	subsys->dev.class = nvme_subsys_class;  in nvme_init_subsystem()
2918 	subsys->dev.release = nvme_release_subsystem;  in nvme_init_subsystem()
2919 	subsys->dev.groups = nvme_subsys_attrs_groups;  in nvme_init_subsystem()
2920 	dev_set_name(&subsys->dev, "nvme-subsys%d", ctrl->instance);  in nvme_init_subsystem()
2921 	device_initialize(&subsys->dev);  in nvme_init_subsystem()
2924 	found = __nvme_find_get_subsystem(subsys->subnqn);  in nvme_init_subsystem()
2926 		put_device(&subsys->dev);  in nvme_init_subsystem()
2927 		subsys = found;  in nvme_init_subsystem()
2929 		if (!nvme_validate_cntlid(subsys, ctrl, id)) {  in nvme_init_subsystem()
2934 		ret = device_add(&subsys->dev);  in nvme_init_subsystem()
2938 			put_device(&subsys->dev);  in nvme_init_subsystem()
2941 		ida_init(&subsys->ns_ida);  in nvme_init_subsystem()
2942 		list_add_tail(&subsys->entry, &nvme_subsystems);  in nvme_init_subsystem()
2945 	ret = sysfs_create_link(&subsys->dev.kobj, &ctrl->device->kobj,  in nvme_init_subsystem()
2954 		subsys->instance = ctrl->instance;  in nvme_init_subsystem()
2955 	ctrl->subsys = subsys;  in nvme_init_subsystem()
2956 	list_add_tail(&ctrl->subsys_entry, &subsys->ctrls);  in nvme_init_subsystem()
2961 	nvme_put_subsystem(subsys);  in nvme_init_subsystem()
3115 	memcpy(ctrl->subsys->firmware_rev, id->fr,  in nvme_init_identify()
3116 	       sizeof(ctrl->subsys->firmware_rev));  in nvme_init_identify()
3360 	struct nvme_subsystem *subsys = head->subsys;  in wwid_show()  local
3361 	int serial_len = sizeof(subsys->serial);  in wwid_show()
3362 	int model_len = sizeof(subsys->model);  in wwid_show()
3373 	while (serial_len > 0 && (subsys->serial[serial_len - 1] == ' ' ||  in wwid_show()
3374 				  subsys->serial[serial_len - 1] == '\0'))  in wwid_show()
3376 	while (model_len > 0 && (subsys->model[model_len - 1] == ' ' ||  in wwid_show()
3377 				 subsys->model[model_len - 1] == '\0'))  in wwid_show()
3380 	return sysfs_emit(buf, "nvme.%04x-%*phN-%*phN-%08x\n", subsys->vendor_id,  in wwid_show()
3381 		serial_len, subsys->serial, model_len, subsys->model,  in wwid_show()
3483 		(int)sizeof(ctrl->subsys->field), ctrl->subsys->field);		\
3558 	return sysfs_emit(buf, "%s\n", ctrl->subsys->subnqn);  in nvme_sysfs_show_subsysnqn()
3893 	lockdep_assert_held(&ctrl->subsys->lock);  in nvme_find_ns_head()
3895 	list_for_each_entry(h, &ctrl->subsys->nsheads, entry) {  in nvme_find_ns_head()
3910 static int nvme_subsys_check_duplicate_ids(struct nvme_subsystem *subsys,  in nvme_subsys_check_duplicate_ids()  argument
3918 	lockdep_assert_held(&subsys->lock);  in nvme_subsys_check_duplicate_ids()
3920 	list_for_each_entry(h, &subsys->nsheads, entry) {  in nvme_subsys_check_duplicate_ids()
4015 	ret = ida_alloc_min(&ctrl->subsys->ns_ida, 1, GFP_KERNEL);  in nvme_alloc_ns_head()
4023 	head->subsys = ctrl->subsys;  in nvme_alloc_ns_head()
4040 	list_add_tail(&head->entry, &ctrl->subsys->nsheads);  in nvme_alloc_ns_head()
4042 	kref_get(&ctrl->subsys->ref);  in nvme_alloc_ns_head()
4048 	ida_free(&ctrl->subsys->ns_ida, head->instance);  in nvme_alloc_ns_head()
4089 	ret = nvme_global_check_duplicate_ids(ctrl->subsys, &info->ids);  in nvme_init_ns_head()
4097 	mutex_lock(&ctrl->subsys->lock);  in nvme_init_ns_head()
4100 		ret = nvme_subsys_check_duplicate_ids(ctrl->subsys, &info->ids);  in nvme_init_ns_head()
4138 	mutex_unlock(&ctrl->subsys->lock);  in nvme_init_ns_head()
4144 	mutex_unlock(&ctrl->subsys->lock);  in nvme_init_ns_head()
4229 		sprintf(disk->disk_name, "nvme%dc%dn%d", ctrl->subsys->instance,  in nvme_alloc_ns()
4233 		sprintf(disk->disk_name, "nvme%dn%d", ctrl->subsys->instance,  in nvme_alloc_ns()
4265 	mutex_lock(&ctrl->subsys->lock);  in nvme_alloc_ns()
4269 	mutex_unlock(&ctrl->subsys->lock);  in nvme_alloc_ns()
4298 	mutex_lock(&ns->ctrl->subsys->lock);  in nvme_ns_remove()
4304 	mutex_unlock(&ns->ctrl->subsys->lock);  in nvme_ns_remove()
4981 	struct nvme_subsystem *subsys = ctrl->subsys;  in nvme_free_ctrl()  local
4983 	if (!subsys || ctrl->instance != subsys->instance)  in nvme_free_ctrl()
4992 	if (subsys) {  in nvme_free_ctrl()
4995 		sysfs_remove_link(&subsys->dev.kobj, dev_name(ctrl->device));  in nvme_free_ctrl()
5001 	if (subsys)  in nvme_free_ctrl()
5002 		nvme_put_subsystem(subsys);  in nvme_free_ctrl()