38 	const struct tcp_congestion_ops *ca = tcp_ca_find(name);  in __tcp_ca_find_autoload()  local
40 	if (!ca && capable(CAP_NET_ADMIN)) {  in __tcp_ca_find_autoload()
44 		ca = tcp_ca_find(name);  in __tcp_ca_find_autoload()
47 	return ca;  in __tcp_ca_find_autoload()
67 int tcp_register_congestion_control(struct tcp_congestion_ops *ca)  in tcp_register_congestion_control()  argument
72 	if (!ca->ssthresh || !ca->cong_avoid) {  in tcp_register_congestion_control()
73 		pr_err("%s does not implement required ops\n", ca->name);  in tcp_register_congestion_control()
77 	ca->key = jhash(ca->name, sizeof(ca->name), strlen(ca->name));  in tcp_register_congestion_control()
80 	if (ca->key == TCP_CA_UNSPEC || tcp_ca_find_key(ca->key)) {  in tcp_register_congestion_control()
82 			  ca->name);  in tcp_register_congestion_control()
85 		list_add_tail_rcu(&ca->list, &tcp_cong_list);  in tcp_register_congestion_control()
86 		pr_debug("%s registered\n", ca->name);  in tcp_register_congestion_control()
100 void tcp_unregister_congestion_control(struct tcp_congestion_ops *ca)  in tcp_unregister_congestion_control()  argument
103 	list_del_rcu(&ca->list);  in tcp_unregister_congestion_control()
119 	const struct tcp_congestion_ops *ca;  in tcp_ca_get_key_by_name()  local
125 	ca = __tcp_ca_find_autoload(name);  in tcp_ca_get_key_by_name()
126 	if (ca) {  in tcp_ca_get_key_by_name()
127 		key = ca->key;  in tcp_ca_get_key_by_name()
128 		*ecn_ca = ca->flags & TCP_CONG_NEEDS_ECN;  in tcp_ca_get_key_by_name()
138 	const struct tcp_congestion_ops *ca;  in tcp_ca_get_name_by_key()  local
142 	ca = tcp_ca_find_key(key);  in tcp_ca_get_name_by_key()
143 	if (ca)  in tcp_ca_get_name_by_key()
144 		ret = strncpy(buffer, ca->name,  in tcp_ca_get_name_by_key()
156 	struct tcp_congestion_ops *ca;  in tcp_assign_congestion_control()  local
159 	list_for_each_entry_rcu(ca, &tcp_cong_list, list) {  in tcp_assign_congestion_control()
160 		if (likely(try_module_get(ca->owner))) {  in tcp_assign_congestion_control()
161 			icsk->icsk_ca_ops = ca;  in tcp_assign_congestion_control()
174 	if (ca->get_info)  in tcp_assign_congestion_control()
176 	if (ca->flags & TCP_CONG_NEEDS_ECN)  in tcp_assign_congestion_control()
196 					  const struct tcp_congestion_ops *ca)  in tcp_reinit_congestion_control()  argument
201 	icsk->icsk_ca_ops = ca;  in tcp_reinit_congestion_control()
221 	struct tcp_congestion_ops *ca;  in tcp_set_default_congestion_control()  local
225 	ca = tcp_ca_find(name);  in tcp_set_default_congestion_control()
227 	if (!ca && capable(CAP_NET_ADMIN)) {  in tcp_set_default_congestion_control()
232 		ca = tcp_ca_find(name);  in tcp_set_default_congestion_control()
236 	if (ca) {  in tcp_set_default_congestion_control()
237 		ca->flags |= TCP_CONG_NON_RESTRICTED;	/* default is always allowed */  in tcp_set_default_congestion_control()
238 		list_move(&ca->list, &tcp_cong_list);  in tcp_set_default_congestion_control()
256 	struct tcp_congestion_ops *ca;  in tcp_get_available_congestion_control()  local
260 	list_for_each_entry_rcu(ca, &tcp_cong_list, list) {  in tcp_get_available_congestion_control()
263 				 offs == 0 ? "" : " ", ca->name);  in tcp_get_available_congestion_control()
271 	struct tcp_congestion_ops *ca;  in tcp_get_default_congestion_control()  local
276 	ca = list_entry(tcp_cong_list.next, struct tcp_congestion_ops, list);  in tcp_get_default_congestion_control()
277 	strncpy(name, ca->name, TCP_CA_NAME_MAX);  in tcp_get_default_congestion_control()
284 	struct tcp_congestion_ops *ca;  in tcp_get_allowed_congestion_control()  local
289 	list_for_each_entry_rcu(ca, &tcp_cong_list, list) {  in tcp_get_allowed_congestion_control()
290 		if (!(ca->flags & TCP_CONG_NON_RESTRICTED))  in tcp_get_allowed_congestion_control()
294 				 offs == 0 ? "" : " ", ca->name);  in tcp_get_allowed_congestion_control()
302 	struct tcp_congestion_ops *ca;  in tcp_set_allowed_congestion_control()  local
313 		ca = tcp_ca_find(name);  in tcp_set_allowed_congestion_control()
314 		if (!ca) {  in tcp_set_allowed_congestion_control()
321 	list_for_each_entry_rcu(ca, &tcp_cong_list, list)  in tcp_set_allowed_congestion_control()
322 		ca->flags &= ~TCP_CONG_NON_RESTRICTED;  in tcp_set_allowed_congestion_control()
326 		ca = tcp_ca_find(name);  in tcp_set_allowed_congestion_control()
327 		WARN_ON(!ca);  in tcp_set_allowed_congestion_control()
328 		if (ca)  in tcp_set_allowed_congestion_control()
329 			ca->flags |= TCP_CONG_NON_RESTRICTED;  in tcp_set_allowed_congestion_control()
342 	const struct tcp_congestion_ops *ca;  in tcp_set_congestion_control()  local
349 	ca = __tcp_ca_find_autoload(name);  in tcp_set_congestion_control()
351 	if (ca == icsk->icsk_ca_ops) {  in tcp_set_congestion_control()
355 	if (!ca)  in tcp_set_congestion_control()
357 	else if (!((ca->flags & TCP_CONG_NON_RESTRICTED) ||  in tcp_set_congestion_control()
360 	else if (!try_module_get(ca->owner))  in tcp_set_congestion_control()
363 		tcp_reinit_congestion_control(sk, ca);  in tcp_set_congestion_control()