1 // SPDX-License-Identifier: GPL-2.0
4 * Copyright (c) 2022, Intel Corporation.
10 void mptcp_free_local_addr_list(struct mptcp_sock *msk)
12 struct mptcp_pm_addr_entry *entry, *tmp;
13 struct sock *sk = (struct sock *)msk;
16 if (!mptcp_pm_is_userspace(msk))
19 spin_lock_bh(&msk->pm.lock);
20 list_splice_init(&msk->pm.userspace_pm_local_addr_list, &free_list);
21 spin_unlock_bh(&msk->pm.lock);
23 list_for_each_entry_safe(entry, tmp, &free_list, list) {
24 sock_kfree_s(sk, entry, sizeof(*entry));
28 int mptcp_userspace_pm_append_new_local_addr(struct mptcp_sock *msk,
29 struct mptcp_pm_addr_entry *entry)
31 DECLARE_BITMAP(id_bitmap, MPTCP_PM_MAX_ADDR_ID + 1);
32 struct mptcp_pm_addr_entry *match = NULL;
33 struct sock *sk = (struct sock *)msk;
34 struct mptcp_pm_addr_entry *e;
35 bool addr_match = false;
36 bool id_match = false;
39 bitmap_zero(id_bitmap, MPTCP_PM_MAX_ADDR_ID + 1);
41 spin_lock_bh(&msk->pm.lock);
42 list_for_each_entry(e, &msk->pm.userspace_pm_local_addr_list, list) {
43 addr_match = mptcp_addresses_equal(&e->addr, &entry->addr, true);
44 if (addr_match && entry->addr.id == 0)
45 entry->addr.id = e->addr.id;
46 id_match = (e->addr.id == entry->addr.id);
47 if (addr_match && id_match) {
50 } else if (addr_match || id_match) {
53 __set_bit(e->addr.id, id_bitmap);
56 if (!match && !addr_match && !id_match) {
57 /* Memory for the entry is allocated from the
60 e = sock_kmalloc(sk, sizeof(*e), GFP_ATOMIC);
62 spin_unlock_bh(&msk->pm.lock);
68 e->addr.id = find_next_zero_bit(id_bitmap,
69 MPTCP_PM_MAX_ADDR_ID + 1,
71 list_add_tail_rcu(&e->list, &msk->pm.userspace_pm_local_addr_list);
77 spin_unlock_bh(&msk->pm.lock);
81 int mptcp_userspace_pm_get_flags_and_ifindex_by_id(struct mptcp_sock *msk,
83 u8 *flags, int *ifindex)
85 struct mptcp_pm_addr_entry *entry, *match = NULL;
90 spin_lock_bh(&msk->pm.lock);
91 list_for_each_entry(entry, &msk->pm.userspace_pm_local_addr_list, list) {
92 if (id == entry->addr.id) {
97 spin_unlock_bh(&msk->pm.lock);
99 *flags = match->flags;
100 *ifindex = match->ifindex;
106 int mptcp_userspace_pm_get_local_id(struct mptcp_sock *msk,
107 struct mptcp_addr_info *skc)
109 struct mptcp_pm_addr_entry new_entry;
110 __be16 msk_sport = ((struct inet_sock *)
111 inet_sk((struct sock *)msk))->inet_sport;
113 memset(&new_entry, 0, sizeof(struct mptcp_pm_addr_entry));
114 new_entry.addr = *skc;
115 new_entry.addr.id = 0;
116 new_entry.flags = MPTCP_PM_ADDR_FLAG_IMPLICIT;
118 if (new_entry.addr.port == msk_sport)
119 new_entry.addr.port = 0;
121 return mptcp_userspace_pm_append_new_local_addr(msk, &new_entry);
124 int mptcp_nl_cmd_announce(struct sk_buff *skb, struct genl_info *info)
126 struct nlattr *token = info->attrs[MPTCP_PM_ATTR_TOKEN];
127 struct nlattr *addr = info->attrs[MPTCP_PM_ATTR_ADDR];
128 struct mptcp_pm_addr_entry addr_val;
129 struct mptcp_sock *msk;
133 if (!addr || !token) {
134 GENL_SET_ERR_MSG(info, "missing required inputs");
138 token_val = nla_get_u32(token);
140 msk = mptcp_token_get_sock(sock_net(skb->sk), token_val);
142 NL_SET_ERR_MSG_ATTR(info->extack, token, "invalid token");
146 if (!mptcp_pm_is_userspace(msk)) {
147 GENL_SET_ERR_MSG(info, "invalid request; userspace PM not selected");
151 err = mptcp_pm_parse_entry(addr, info, true, &addr_val);
153 GENL_SET_ERR_MSG(info, "error parsing local address");
157 if (addr_val.addr.id == 0 || !(addr_val.flags & MPTCP_PM_ADDR_FLAG_SIGNAL)) {
158 GENL_SET_ERR_MSG(info, "invalid addr id or flags");
163 err = mptcp_userspace_pm_append_new_local_addr(msk, &addr_val);
165 GENL_SET_ERR_MSG(info, "did not match address and id");
169 lock_sock((struct sock *)msk);
170 spin_lock_bh(&msk->pm.lock);
172 if (mptcp_pm_alloc_anno_list(msk, &addr_val)) {
173 mptcp_pm_announce_addr(msk, &addr_val.addr, false);
174 mptcp_pm_nl_addr_send_ack(msk);
177 spin_unlock_bh(&msk->pm.lock);
178 release_sock((struct sock *)msk);
182 sock_put((struct sock *)msk);
186 int mptcp_nl_cmd_remove(struct sk_buff *skb, struct genl_info *info)
188 struct nlattr *token = info->attrs[MPTCP_PM_ATTR_TOKEN];
189 struct nlattr *id = info->attrs[MPTCP_PM_ATTR_LOC_ID];
190 struct mptcp_pm_addr_entry *match = NULL;
191 struct mptcp_pm_addr_entry *entry;
192 struct mptcp_sock *msk;
193 LIST_HEAD(free_list);
199 GENL_SET_ERR_MSG(info, "missing required inputs");
203 id_val = nla_get_u8(id);
204 token_val = nla_get_u32(token);
206 msk = mptcp_token_get_sock(sock_net(skb->sk), token_val);
208 NL_SET_ERR_MSG_ATTR(info->extack, token, "invalid token");
212 if (!mptcp_pm_is_userspace(msk)) {
213 GENL_SET_ERR_MSG(info, "invalid request; userspace PM not selected");
217 lock_sock((struct sock *)msk);
219 list_for_each_entry(entry, &msk->pm.userspace_pm_local_addr_list, list) {
220 if (entry->addr.id == id_val) {
227 GENL_SET_ERR_MSG(info, "address with specified id not found");
228 release_sock((struct sock *)msk);
232 list_move(&match->list, &free_list);
234 mptcp_pm_remove_addrs_and_subflows(msk, &free_list);
236 release_sock((struct sock *)msk);
238 list_for_each_entry_safe(match, entry, &free_list, list) {
239 sock_kfree_s((struct sock *)msk, match, sizeof(*match));
244 sock_put((struct sock *)msk);
248 int mptcp_nl_cmd_sf_create(struct sk_buff *skb, struct genl_info *info)
250 struct nlattr *raddr = info->attrs[MPTCP_PM_ATTR_ADDR_REMOTE];
251 struct nlattr *token = info->attrs[MPTCP_PM_ATTR_TOKEN];
252 struct nlattr *laddr = info->attrs[MPTCP_PM_ATTR_ADDR];
253 struct mptcp_addr_info addr_r;
254 struct mptcp_addr_info addr_l;
255 struct mptcp_sock *msk;
260 if (!laddr || !raddr || !token) {
261 GENL_SET_ERR_MSG(info, "missing required inputs");
265 token_val = nla_get_u32(token);
267 msk = mptcp_token_get_sock(genl_info_net(info), token_val);
269 NL_SET_ERR_MSG_ATTR(info->extack, token, "invalid token");
273 if (!mptcp_pm_is_userspace(msk)) {
274 GENL_SET_ERR_MSG(info, "invalid request; userspace PM not selected");
278 err = mptcp_pm_parse_addr(laddr, info, &addr_l);
280 NL_SET_ERR_MSG_ATTR(info->extack, laddr, "error parsing local addr");
284 if (addr_l.id == 0) {
285 NL_SET_ERR_MSG_ATTR(info->extack, laddr, "missing local addr id");
290 err = mptcp_pm_parse_addr(raddr, info, &addr_r);
292 NL_SET_ERR_MSG_ATTR(info->extack, raddr, "error parsing remote addr");
296 sk = &msk->sk.icsk_inet.sk;
298 if (!mptcp_pm_addr_families_match(sk, &addr_l, &addr_r)) {
299 GENL_SET_ERR_MSG(info, "families mismatch");
306 err = __mptcp_subflow_connect(sk, &addr_l, &addr_r);
311 sock_put((struct sock *)msk);
315 static struct sock *mptcp_nl_find_ssk(struct mptcp_sock *msk,
316 const struct mptcp_addr_info *local,
317 const struct mptcp_addr_info *remote)
319 struct mptcp_subflow_context *subflow;
321 if (local->family != remote->family)
324 mptcp_for_each_subflow(msk, subflow) {
325 const struct inet_sock *issk;
328 ssk = mptcp_subflow_tcp_sock(subflow);
330 if (local->family != ssk->sk_family)
335 switch (ssk->sk_family) {
337 if (issk->inet_saddr != local->addr.s_addr ||
338 issk->inet_daddr != remote->addr.s_addr)
341 #if IS_ENABLED(CONFIG_MPTCP_IPV6)
343 const struct ipv6_pinfo *pinfo = inet6_sk(ssk);
345 if (!ipv6_addr_equal(&local->addr6, &pinfo->saddr) ||
346 !ipv6_addr_equal(&remote->addr6, &ssk->sk_v6_daddr))
355 if (issk->inet_sport == local->port &&
356 issk->inet_dport == remote->port)
363 int mptcp_nl_cmd_sf_destroy(struct sk_buff *skb, struct genl_info *info)
365 struct nlattr *raddr = info->attrs[MPTCP_PM_ATTR_ADDR_REMOTE];
366 struct nlattr *token = info->attrs[MPTCP_PM_ATTR_TOKEN];
367 struct nlattr *laddr = info->attrs[MPTCP_PM_ATTR_ADDR];
368 struct mptcp_addr_info addr_l;
369 struct mptcp_addr_info addr_r;
370 struct mptcp_sock *msk;
371 struct sock *sk, *ssk;
375 if (!laddr || !raddr || !token) {
376 GENL_SET_ERR_MSG(info, "missing required inputs");
380 token_val = nla_get_u32(token);
382 msk = mptcp_token_get_sock(genl_info_net(info), token_val);
384 NL_SET_ERR_MSG_ATTR(info->extack, token, "invalid token");
388 if (!mptcp_pm_is_userspace(msk)) {
389 GENL_SET_ERR_MSG(info, "invalid request; userspace PM not selected");
393 err = mptcp_pm_parse_addr(laddr, info, &addr_l);
395 NL_SET_ERR_MSG_ATTR(info->extack, laddr, "error parsing local addr");
399 err = mptcp_pm_parse_addr(raddr, info, &addr_r);
401 NL_SET_ERR_MSG_ATTR(info->extack, raddr, "error parsing remote addr");
405 if (addr_l.family != addr_r.family) {
406 GENL_SET_ERR_MSG(info, "address families do not match");
411 if (!addr_l.port || !addr_r.port) {
412 GENL_SET_ERR_MSG(info, "missing local or remote port");
417 sk = &msk->sk.icsk_inet.sk;
419 ssk = mptcp_nl_find_ssk(msk, &addr_l, &addr_r);
421 struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(ssk);
423 mptcp_subflow_shutdown(sk, ssk, RCV_SHUTDOWN | SEND_SHUTDOWN);
424 mptcp_close_ssk(sk, ssk, subflow);
425 MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_RMSUBFLOW);
433 sock_put((struct sock *)msk);
437 int mptcp_userspace_pm_set_flags(struct net *net, struct nlattr *token,
438 struct mptcp_pm_addr_entry *loc,
439 struct mptcp_pm_addr_entry *rem, u8 bkup)
441 struct mptcp_sock *msk;
445 token_val = nla_get_u32(token);
447 msk = mptcp_token_get_sock(net, token_val);
451 if (!mptcp_pm_is_userspace(msk))
454 if (loc->addr.family == AF_UNSPEC ||
455 rem->addr.family == AF_UNSPEC)
458 lock_sock((struct sock *)msk);
459 ret = mptcp_pm_nl_mp_prio_send_ack(msk, &loc->addr, &rem->addr, bkup);
460 release_sock((struct sock *)msk);
463 sock_put((struct sock *)msk);