124 static u32 nvmet_max_nsid(struct nvmet_subsys *subsys)  in nvmet_max_nsid()  argument
130 	xa_for_each(&subsys->namespaces, idx, cur)  in nvmet_max_nsid()
242 void nvmet_ns_changed(struct nvmet_subsys *subsys, u32 nsid)  in nvmet_ns_changed()  argument
246 	lockdep_assert_held(&subsys->lock);  in nvmet_ns_changed()
248 	list_for_each_entry(ctrl, &subsys->ctrls, subsys_entry) {  in nvmet_ns_changed()
258 void nvmet_send_ana_event(struct nvmet_subsys *subsys,  in nvmet_send_ana_event()  argument
263 	mutex_lock(&subsys->lock);  in nvmet_send_ana_event()
264 	list_for_each_entry(ctrl, &subsys->ctrls, subsys_entry) {  in nvmet_send_ana_event()
272 	mutex_unlock(&subsys->lock);  in nvmet_send_ana_event()
281 		nvmet_send_ana_event(p->subsys, port);  in nvmet_port_send_ana_event()
308 void nvmet_port_del_ctrls(struct nvmet_port *port, struct nvmet_subsys *subsys)  in nvmet_port_del_ctrls()  argument
312 	mutex_lock(&subsys->lock);  in nvmet_port_del_ctrls()
313 	list_for_each_entry(ctrl, &subsys->ctrls, subsys_entry) {  in nvmet_port_del_ctrls()
317 	mutex_unlock(&subsys->lock);  in nvmet_port_del_ctrls()
441 	struct nvmet_subsys *subsys = nvmet_req_subsys(req);  in nvmet_req_find_ns()  local
443 	req->ns = xa_load(&subsys->namespaces, nsid);  in nvmet_req_find_ns()
446 		if (nvmet_subsys_nsid_exists(subsys, nsid))  in nvmet_req_find_ns()
518  * Note: ctrl->subsys->lock should be held when calling this function
570 	struct nvmet_subsys *subsys = ns->subsys;  in nvmet_ns_enable()  local
574 	mutex_lock(&subsys->lock);  in nvmet_ns_enable()
577 	if (nvmet_is_passthru_subsys(subsys)) {  in nvmet_ns_enable()
586 	if (subsys->nr_namespaces == NVMET_MAX_NAMESPACES)  in nvmet_ns_enable()
599 	list_for_each_entry(ctrl, &subsys->ctrls, subsys_entry)  in nvmet_ns_enable()
607 	if (ns->nsid > subsys->max_nsid)  in nvmet_ns_enable()
608 		subsys->max_nsid = ns->nsid;  in nvmet_ns_enable()
610 	ret = xa_insert(&subsys->namespaces, ns->nsid, ns, GFP_KERNEL);  in nvmet_ns_enable()
614 	subsys->nr_namespaces++;  in nvmet_ns_enable()
616 	nvmet_ns_changed(subsys, ns->nsid);  in nvmet_ns_enable()
620 	mutex_unlock(&subsys->lock);  in nvmet_ns_enable()
624 	subsys->max_nsid = nvmet_max_nsid(subsys);  in nvmet_ns_enable()
627 	list_for_each_entry(ctrl, &subsys->ctrls, subsys_entry)  in nvmet_ns_enable()
636 	struct nvmet_subsys *subsys = ns->subsys;  in nvmet_ns_disable()  local
639 	mutex_lock(&subsys->lock);  in nvmet_ns_disable()
644 	xa_erase(&ns->subsys->namespaces, ns->nsid);  in nvmet_ns_disable()
645 	if (ns->nsid == subsys->max_nsid)  in nvmet_ns_disable()
646 		subsys->max_nsid = nvmet_max_nsid(subsys);  in nvmet_ns_disable()
648 	list_for_each_entry(ctrl, &subsys->ctrls, subsys_entry)  in nvmet_ns_disable()
651 	mutex_unlock(&subsys->lock);  in nvmet_ns_disable()
666 	mutex_lock(&subsys->lock);  in nvmet_ns_disable()
668 	subsys->nr_namespaces--;  in nvmet_ns_disable()
669 	nvmet_ns_changed(subsys, ns->nsid);  in nvmet_ns_disable()
672 	mutex_unlock(&subsys->lock);  in nvmet_ns_disable()
687 struct nvmet_ns *nvmet_ns_alloc(struct nvmet_subsys *subsys, u32 nsid)  in nvmet_ns_alloc()  argument
698 	ns->subsys = subsys;  in nvmet_ns_alloc()
1186 	if (!nvmet_is_disc_subsys(ctrl->subsys) &&  in nvmet_start_ctrl()
1257 	if (nvmet_is_passthru_subsys(ctrl->subsys))  in nvmet_init_cap()
1266 	struct nvmet_subsys *subsys;  in nvmet_ctrl_find_get()  local
1268 	subsys = nvmet_find_get_subsys(req->port, subsysnqn);  in nvmet_ctrl_find_get()
1269 	if (!subsys) {  in nvmet_ctrl_find_get()
1276 	mutex_lock(&subsys->lock);  in nvmet_ctrl_find_get()
1277 	list_for_each_entry(ctrl, &subsys->ctrls, subsys_entry) {  in nvmet_ctrl_find_get()
1292 	pr_warn("could not find controller %d for subsys %s / host %s\n",  in nvmet_ctrl_find_get()
1297 	mutex_unlock(&subsys->lock);  in nvmet_ctrl_find_get()
1298 	nvmet_subsys_put(subsys);  in nvmet_ctrl_find_get()
1324 bool nvmet_host_allowed(struct nvmet_subsys *subsys, const char *hostnqn)  in nvmet_host_allowed()  argument
1330 	if (subsys->allow_any_host)  in nvmet_host_allowed()
1333 	if (nvmet_is_disc_subsys(subsys)) /* allow all access to disc subsys */  in nvmet_host_allowed()
1336 	list_for_each_entry(p, &subsys->hosts, entry) {  in nvmet_host_allowed()
1345  * Note: ctrl->subsys->lock should be held when calling this function
1358 	xa_for_each(&ctrl->subsys->namespaces, idx, ns)  in nvmet_setup_p2p_ns_map()
1363  * Note: ctrl->subsys->lock should be held when calling this function
1388 	struct nvmet_subsys *subsys;  in nvmet_alloc_ctrl()  local
1394 	subsys = nvmet_find_get_subsys(req->port, subsysnqn);  in nvmet_alloc_ctrl()
1395 	if (!subsys) {  in nvmet_alloc_ctrl()
1404 	if (!nvmet_host_allowed(subsys, hostnqn)) {  in nvmet_alloc_ctrl()
1427 		subsys->clear_ids = 1;  in nvmet_alloc_ctrl()
1440 	ctrl->subsys = subsys;  in nvmet_alloc_ctrl()
1441 	ctrl->pi_support = ctrl->port->pi_enable && ctrl->subsys->pi_support;  in nvmet_alloc_ctrl()
1450 	ctrl->sqs = kcalloc(subsys->max_qid + 1,  in nvmet_alloc_ctrl()
1457 			     subsys->cntlid_min, subsys->cntlid_max,  in nvmet_alloc_ctrl()
1469 	if (nvmet_is_disc_subsys(ctrl->subsys) && !kato)  in nvmet_alloc_ctrl()
1480 	mutex_lock(&subsys->lock);  in nvmet_alloc_ctrl()
1481 	list_add_tail(&ctrl->subsys_entry, &subsys->ctrls);  in nvmet_alloc_ctrl()
1484 	mutex_unlock(&subsys->lock);  in nvmet_alloc_ctrl()
1496 	nvmet_subsys_put(subsys);  in nvmet_alloc_ctrl()
1504 	struct nvmet_subsys *subsys = ctrl->subsys;  in nvmet_ctrl_free()  local
1506 	mutex_lock(&subsys->lock);  in nvmet_ctrl_free()
1509 	mutex_unlock(&subsys->lock);  in nvmet_ctrl_free()
1527 	nvmet_subsys_put(subsys);  in nvmet_ctrl_free()
1577 		if (!strncmp(p->subsys->subsysnqn, subsysnqn,  in nvmet_find_get_subsys()
1579 			if (!kref_get_unless_zero(&p->subsys->ref))  in nvmet_find_get_subsys()
1582 			return p->subsys;  in nvmet_find_get_subsys()
1592 	struct nvmet_subsys *subsys;  in nvmet_subsys_alloc()  local
1596 	subsys = kzalloc(sizeof(*subsys), GFP_KERNEL);  in nvmet_subsys_alloc()
1597 	if (!subsys)  in nvmet_subsys_alloc()
1600 	subsys->ver = NVMET_DEFAULT_VS;  in nvmet_subsys_alloc()
1603 	bin2hex(subsys->serial, &serial, sizeof(serial));  in nvmet_subsys_alloc()
1605 	subsys->model_number = kstrdup(NVMET_DEFAULT_CTRL_MODEL, GFP_KERNEL);  in nvmet_subsys_alloc()
1606 	if (!subsys->model_number) {  in nvmet_subsys_alloc()
1611 	subsys->ieee_oui = 0;  in nvmet_subsys_alloc()
1613 	subsys->firmware_rev = kstrndup(UTS_RELEASE, NVMET_FR_MAX_SIZE, GFP_KERNEL);  in nvmet_subsys_alloc()
1614 	if (!subsys->firmware_rev) {  in nvmet_subsys_alloc()
1621 		subsys->max_qid = NVMET_NR_QUEUES;  in nvmet_subsys_alloc()
1625 		subsys->max_qid = 0;  in nvmet_subsys_alloc()
1632 	subsys->type = type;  in nvmet_subsys_alloc()
1633 	subsys->subsysnqn = kstrndup(subsysnqn, NVMF_NQN_SIZE,  in nvmet_subsys_alloc()
1635 	if (!subsys->subsysnqn) {  in nvmet_subsys_alloc()
1639 	subsys->cntlid_min = NVME_CNTLID_MIN;  in nvmet_subsys_alloc()
1640 	subsys->cntlid_max = NVME_CNTLID_MAX;  in nvmet_subsys_alloc()
1641 	kref_init(&subsys->ref);  in nvmet_subsys_alloc()
1643 	mutex_init(&subsys->lock);  in nvmet_subsys_alloc()
1644 	xa_init(&subsys->namespaces);  in nvmet_subsys_alloc()
1645 	INIT_LIST_HEAD(&subsys->ctrls);  in nvmet_subsys_alloc()
1646 	INIT_LIST_HEAD(&subsys->hosts);  in nvmet_subsys_alloc()
1648 	ret = nvmet_debugfs_subsys_setup(subsys);  in nvmet_subsys_alloc()
1652 	return subsys;  in nvmet_subsys_alloc()
1655 	kfree(subsys->subsysnqn);  in nvmet_subsys_alloc()
1657 	kfree(subsys->firmware_rev);  in nvmet_subsys_alloc()
1659 	kfree(subsys->model_number);  in nvmet_subsys_alloc()
1661 	kfree(subsys);  in nvmet_subsys_alloc()
1667 	struct nvmet_subsys *subsys =  in nvmet_subsys_free()  local
1670 	WARN_ON_ONCE(!xa_empty(&subsys->namespaces));  in nvmet_subsys_free()
1672 	nvmet_debugfs_subsys_free(subsys);  in nvmet_subsys_free()
1674 	xa_destroy(&subsys->namespaces);  in nvmet_subsys_free()
1675 	nvmet_passthru_subsys_free(subsys);  in nvmet_subsys_free()
1677 	kfree(subsys->subsysnqn);  in nvmet_subsys_free()
1678 	kfree(subsys->model_number);  in nvmet_subsys_free()
1679 	kfree(subsys->firmware_rev);  in nvmet_subsys_free()
1680 	kfree(subsys);  in nvmet_subsys_free()
1683 void nvmet_subsys_del_ctrls(struct nvmet_subsys *subsys)  in nvmet_subsys_del_ctrls()  argument
1687 	mutex_lock(&subsys->lock);  in nvmet_subsys_del_ctrls()
1688 	list_for_each_entry(ctrl, &subsys->ctrls, subsys_entry)  in nvmet_subsys_del_ctrls()
1690 	mutex_unlock(&subsys->lock);  in nvmet_subsys_del_ctrls()
1693 void nvmet_subsys_put(struct nvmet_subsys *subsys)  in nvmet_subsys_put()  argument
1695 	kref_put(&subsys->ref, nvmet_subsys_free);  in nvmet_subsys_put()