120 static u32 nvmet_max_nsid(struct nvmet_subsys *subsys)  in nvmet_max_nsid()  argument
126 	xa_for_each(&subsys->namespaces, idx, cur)  in nvmet_max_nsid()
238 void nvmet_ns_changed(struct nvmet_subsys *subsys, u32 nsid)  in nvmet_ns_changed()  argument
242 	lockdep_assert_held(&subsys->lock);  in nvmet_ns_changed()
244 	list_for_each_entry(ctrl, &subsys->ctrls, subsys_entry) {  in nvmet_ns_changed()
254 void nvmet_send_ana_event(struct nvmet_subsys *subsys,  in nvmet_send_ana_event()  argument
259 	mutex_lock(&subsys->lock);  in nvmet_send_ana_event()
260 	list_for_each_entry(ctrl, &subsys->ctrls, subsys_entry) {  in nvmet_send_ana_event()
268 	mutex_unlock(&subsys->lock);  in nvmet_send_ana_event()
277 		nvmet_send_ana_event(p->subsys, port);  in nvmet_port_send_ana_event()
304 void nvmet_port_del_ctrls(struct nvmet_port *port, struct nvmet_subsys *subsys)  in nvmet_port_del_ctrls()  argument
308 	mutex_lock(&subsys->lock);  in nvmet_port_del_ctrls()
309 	list_for_each_entry(ctrl, &subsys->ctrls, subsys_entry) {  in nvmet_port_del_ctrls()
313 	mutex_unlock(&subsys->lock);  in nvmet_port_del_ctrls()
499  * Note: ctrl->subsys->lock should be held when calling this function
551 	struct nvmet_subsys *subsys = ns->subsys;  in nvmet_ns_enable()  local
555 	mutex_lock(&subsys->lock);  in nvmet_ns_enable()
558 	if (nvmet_is_passthru_subsys(subsys)) {  in nvmet_ns_enable()
567 	if (subsys->nr_namespaces == NVMET_MAX_NAMESPACES)  in nvmet_ns_enable()
580 	list_for_each_entry(ctrl, &subsys->ctrls, subsys_entry)  in nvmet_ns_enable()
588 	if (ns->nsid > subsys->max_nsid)  in nvmet_ns_enable()
589 		subsys->max_nsid = ns->nsid;  in nvmet_ns_enable()
591 	ret = xa_insert(&subsys->namespaces, ns->nsid, ns, GFP_KERNEL);  in nvmet_ns_enable()
595 	subsys->nr_namespaces++;  in nvmet_ns_enable()
597 	nvmet_ns_changed(subsys, ns->nsid);  in nvmet_ns_enable()
601 	mutex_unlock(&subsys->lock);  in nvmet_ns_enable()
605 	subsys->max_nsid = nvmet_max_nsid(subsys);  in nvmet_ns_enable()
608 	list_for_each_entry(ctrl, &subsys->ctrls, subsys_entry)  in nvmet_ns_enable()
617 	struct nvmet_subsys *subsys = ns->subsys;  in nvmet_ns_disable()  local
620 	mutex_lock(&subsys->lock);  in nvmet_ns_disable()
625 	xa_erase(&ns->subsys->namespaces, ns->nsid);  in nvmet_ns_disable()
626 	if (ns->nsid == subsys->max_nsid)  in nvmet_ns_disable()
627 		subsys->max_nsid = nvmet_max_nsid(subsys);  in nvmet_ns_disable()
629 	list_for_each_entry(ctrl, &subsys->ctrls, subsys_entry)  in nvmet_ns_disable()
632 	mutex_unlock(&subsys->lock);  in nvmet_ns_disable()
647 	mutex_lock(&subsys->lock);  in nvmet_ns_disable()
649 	subsys->nr_namespaces--;  in nvmet_ns_disable()
650 	nvmet_ns_changed(subsys, ns->nsid);  in nvmet_ns_disable()
653 	mutex_unlock(&subsys->lock);  in nvmet_ns_disable()
668 struct nvmet_ns *nvmet_ns_alloc(struct nvmet_subsys *subsys, u32 nsid)  in nvmet_ns_alloc()  argument
679 	ns->subsys = subsys;  in nvmet_ns_alloc()
1156 	if (!nvmet_is_disc_subsys(ctrl->subsys) &&  in nvmet_start_ctrl()
1226 	if (nvmet_is_passthru_subsys(ctrl->subsys))  in nvmet_init_cap()
1235 	struct nvmet_subsys *subsys;  in nvmet_ctrl_find_get()  local
1237 	subsys = nvmet_find_get_subsys(req->port, subsysnqn);  in nvmet_ctrl_find_get()
1238 	if (!subsys) {  in nvmet_ctrl_find_get()
1245 	mutex_lock(&subsys->lock);  in nvmet_ctrl_find_get()
1246 	list_for_each_entry(ctrl, &subsys->ctrls, subsys_entry) {  in nvmet_ctrl_find_get()
1261 	pr_warn("could not find controller %d for subsys %s / host %s\n",  in nvmet_ctrl_find_get()
1266 	mutex_unlock(&subsys->lock);  in nvmet_ctrl_find_get()
1267 	nvmet_subsys_put(subsys);  in nvmet_ctrl_find_get()
1293 bool nvmet_host_allowed(struct nvmet_subsys *subsys, const char *hostnqn)  in nvmet_host_allowed()  argument
1299 	if (subsys->allow_any_host)  in nvmet_host_allowed()
1302 	if (nvmet_is_disc_subsys(subsys)) /* allow all access to disc subsys */  in nvmet_host_allowed()
1305 	list_for_each_entry(p, &subsys->hosts, entry) {  in nvmet_host_allowed()
1314  * Note: ctrl->subsys->lock should be held when calling this function
1327 	xa_for_each(&ctrl->subsys->namespaces, idx, ns)  in nvmet_setup_p2p_ns_map()
1332  * Note: ctrl->subsys->lock should be held when calling this function
1357 	struct nvmet_subsys *subsys;  in nvmet_alloc_ctrl()  local
1363 	subsys = nvmet_find_get_subsys(req->port, subsysnqn);  in nvmet_alloc_ctrl()
1364 	if (!subsys) {  in nvmet_alloc_ctrl()
1373 	if (!nvmet_host_allowed(subsys, hostnqn)) {  in nvmet_alloc_ctrl()
1396 		subsys->clear_ids = 1;  in nvmet_alloc_ctrl()
1409 	ctrl->subsys = subsys;  in nvmet_alloc_ctrl()
1418 	ctrl->sqs = kcalloc(subsys->max_qid + 1,  in nvmet_alloc_ctrl()
1424 	if (subsys->cntlid_min > subsys->cntlid_max)  in nvmet_alloc_ctrl()
1428 			     subsys->cntlid_min, subsys->cntlid_max,  in nvmet_alloc_ctrl()
1440 	if (nvmet_is_disc_subsys(ctrl->subsys) && !kato)  in nvmet_alloc_ctrl()
1451 	mutex_lock(&subsys->lock);  in nvmet_alloc_ctrl()
1452 	list_add_tail(&ctrl->subsys_entry, &subsys->ctrls);  in nvmet_alloc_ctrl()
1454 	mutex_unlock(&subsys->lock);  in nvmet_alloc_ctrl()
1466 	nvmet_subsys_put(subsys);  in nvmet_alloc_ctrl()
1474 	struct nvmet_subsys *subsys = ctrl->subsys;  in nvmet_ctrl_free()  local
1476 	mutex_lock(&subsys->lock);  in nvmet_ctrl_free()
1479 	mutex_unlock(&subsys->lock);  in nvmet_ctrl_free()
1495 	nvmet_subsys_put(subsys);  in nvmet_ctrl_free()
1530 		if (!strncmp(p->subsys->subsysnqn, subsysnqn,  in nvmet_find_get_subsys()
1532 			if (!kref_get_unless_zero(&p->subsys->ref))  in nvmet_find_get_subsys()
1535 			return p->subsys;  in nvmet_find_get_subsys()
1545 	struct nvmet_subsys *subsys;  in nvmet_subsys_alloc()  local
1549 	subsys = kzalloc(sizeof(*subsys), GFP_KERNEL);  in nvmet_subsys_alloc()
1550 	if (!subsys)  in nvmet_subsys_alloc()
1553 	subsys->ver = NVMET_DEFAULT_VS;  in nvmet_subsys_alloc()
1556 	bin2hex(subsys->serial, &serial, sizeof(serial));  in nvmet_subsys_alloc()
1558 	subsys->model_number = kstrdup(NVMET_DEFAULT_CTRL_MODEL, GFP_KERNEL);  in nvmet_subsys_alloc()
1559 	if (!subsys->model_number) {  in nvmet_subsys_alloc()
1566 		subsys->max_qid = NVMET_NR_QUEUES;  in nvmet_subsys_alloc()
1570 		subsys->max_qid = 0;  in nvmet_subsys_alloc()
1577 	subsys->type = type;  in nvmet_subsys_alloc()
1578 	subsys->subsysnqn = kstrndup(subsysnqn, NVMF_NQN_SIZE,  in nvmet_subsys_alloc()
1580 	if (!subsys->subsysnqn) {  in nvmet_subsys_alloc()
1584 	subsys->cntlid_min = NVME_CNTLID_MIN;  in nvmet_subsys_alloc()
1585 	subsys->cntlid_max = NVME_CNTLID_MAX;  in nvmet_subsys_alloc()
1586 	kref_init(&subsys->ref);  in nvmet_subsys_alloc()
1588 	mutex_init(&subsys->lock);  in nvmet_subsys_alloc()
1589 	xa_init(&subsys->namespaces);  in nvmet_subsys_alloc()
1590 	INIT_LIST_HEAD(&subsys->ctrls);  in nvmet_subsys_alloc()
1591 	INIT_LIST_HEAD(&subsys->hosts);  in nvmet_subsys_alloc()
1593 	return subsys;  in nvmet_subsys_alloc()
1596 	kfree(subsys->model_number);  in nvmet_subsys_alloc()
1598 	kfree(subsys);  in nvmet_subsys_alloc()
1604 	struct nvmet_subsys *subsys =  in nvmet_subsys_free()  local
1607 	WARN_ON_ONCE(!xa_empty(&subsys->namespaces));  in nvmet_subsys_free()
1609 	xa_destroy(&subsys->namespaces);  in nvmet_subsys_free()
1610 	nvmet_passthru_subsys_free(subsys);  in nvmet_subsys_free()
1612 	kfree(subsys->subsysnqn);  in nvmet_subsys_free()
1613 	kfree(subsys->model_number);  in nvmet_subsys_free()
1614 	kfree(subsys);  in nvmet_subsys_free()
1617 void nvmet_subsys_del_ctrls(struct nvmet_subsys *subsys)  in nvmet_subsys_del_ctrls()  argument
1621 	mutex_lock(&subsys->lock);  in nvmet_subsys_del_ctrls()
1622 	list_for_each_entry(ctrl, &subsys->ctrls, subsys_entry)  in nvmet_subsys_del_ctrls()
1624 	mutex_unlock(&subsys->lock);  in nvmet_subsys_del_ctrls()
1627 void nvmet_subsys_put(struct nvmet_subsys *subsys)  in nvmet_subsys_put()  argument
1629 	kref_put(&subsys->ref, nvmet_subsys_free);  in nvmet_subsys_put()