Commit | Line | Data |
---|---|---|
4638de5a KM |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* Multipath TCP | |
3 | * | |
4 | * Copyright (c) 2022, Intel Corporation. | |
5 | */ | |
6 | ||
7 | #include "protocol.h" | |
d2d21f17 | 8 | #include "mib.h" |
4638de5a KM |
9 | |
10 | void mptcp_free_local_addr_list(struct mptcp_sock *msk) | |
11 | { | |
12 | struct mptcp_pm_addr_entry *entry, *tmp; | |
13 | struct sock *sk = (struct sock *)msk; | |
14 | LIST_HEAD(free_list); | |
15 | ||
16 | if (!mptcp_pm_is_userspace(msk)) | |
17 | return; | |
18 | ||
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); | |
22 | ||
23 | list_for_each_entry_safe(entry, tmp, &free_list, list) { | |
24 | sock_kfree_s(sk, entry, sizeof(*entry)); | |
25 | } | |
26 | } | |
27 | ||
aa5887dc | 28 | static int mptcp_userspace_pm_append_new_local_addr(struct mptcp_sock *msk, |
6c347be6 GT |
29 | struct mptcp_pm_addr_entry *entry, |
30 | bool needs_id) | |
4638de5a KM |
31 | { |
32 | DECLARE_BITMAP(id_bitmap, MPTCP_PM_MAX_ADDR_ID + 1); | |
33 | struct mptcp_pm_addr_entry *match = NULL; | |
34 | struct sock *sk = (struct sock *)msk; | |
35 | struct mptcp_pm_addr_entry *e; | |
36 | bool addr_match = false; | |
37 | bool id_match = false; | |
38 | int ret = -EINVAL; | |
39 | ||
40 | bitmap_zero(id_bitmap, MPTCP_PM_MAX_ADDR_ID + 1); | |
41 | ||
42 | spin_lock_bh(&msk->pm.lock); | |
43 | list_for_each_entry(e, &msk->pm.userspace_pm_local_addr_list, list) { | |
44 | addr_match = mptcp_addresses_equal(&e->addr, &entry->addr, true); | |
6c347be6 | 45 | if (addr_match && entry->addr.id == 0 && needs_id) |
4638de5a KM |
46 | entry->addr.id = e->addr.id; |
47 | id_match = (e->addr.id == entry->addr.id); | |
48 | if (addr_match && id_match) { | |
49 | match = e; | |
50 | break; | |
51 | } else if (addr_match || id_match) { | |
52 | break; | |
53 | } | |
54 | __set_bit(e->addr.id, id_bitmap); | |
55 | } | |
56 | ||
57 | if (!match && !addr_match && !id_match) { | |
58 | /* Memory for the entry is allocated from the | |
59 | * sock option buffer. | |
60 | */ | |
61 | e = sock_kmalloc(sk, sizeof(*e), GFP_ATOMIC); | |
62 | if (!e) { | |
40c71f76 MB |
63 | ret = -ENOMEM; |
64 | goto append_err; | |
4638de5a KM |
65 | } |
66 | ||
67 | *e = *entry; | |
6c347be6 | 68 | if (!e->addr.id && needs_id) |
4638de5a KM |
69 | e->addr.id = find_next_zero_bit(id_bitmap, |
70 | MPTCP_PM_MAX_ADDR_ID + 1, | |
71 | 1); | |
72 | list_add_tail_rcu(&e->list, &msk->pm.userspace_pm_local_addr_list); | |
77e4b94a | 73 | msk->pm.local_addr_used++; |
4638de5a KM |
74 | ret = e->addr.id; |
75 | } else if (match) { | |
76 | ret = entry->addr.id; | |
77 | } | |
78 | ||
40c71f76 | 79 | append_err: |
4638de5a KM |
80 | spin_unlock_bh(&msk->pm.lock); |
81 | return ret; | |
82 | } | |
8b201370 | 83 | |
24430f8b GT |
84 | /* If the subflow is closed from the other peer (not via a |
85 | * subflow destroy command then), we want to keep the entry | |
86 | * not to assign the same ID to another address and to be | |
87 | * able to send RM_ADDR after the removal of the subflow. | |
88 | */ | |
89 | static int mptcp_userspace_pm_delete_local_addr(struct mptcp_sock *msk, | |
90 | struct mptcp_pm_addr_entry *addr) | |
91 | { | |
92 | struct mptcp_pm_addr_entry *entry, *tmp; | |
93 | ||
94 | list_for_each_entry_safe(entry, tmp, &msk->pm.userspace_pm_local_addr_list, list) { | |
95 | if (mptcp_addresses_equal(&entry->addr, &addr->addr, false)) { | |
96 | /* TODO: a refcount is needed because the entry can | |
97 | * be used multiple times (e.g. fullmesh mode). | |
98 | */ | |
99 | list_del_rcu(&entry->list); | |
100 | kfree(entry); | |
77e4b94a | 101 | msk->pm.local_addr_used--; |
24430f8b GT |
102 | return 0; |
103 | } | |
104 | } | |
105 | ||
106 | return -EINVAL; | |
107 | } | |
108 | ||
06afe090 GT |
109 | static struct mptcp_pm_addr_entry * |
110 | mptcp_userspace_pm_lookup_addr_by_id(struct mptcp_sock *msk, unsigned int id) | |
111 | { | |
112 | struct mptcp_pm_addr_entry *entry; | |
113 | ||
114 | list_for_each_entry(entry, &msk->pm.userspace_pm_local_addr_list, list) { | |
115 | if (entry->addr.id == id) | |
116 | return entry; | |
117 | } | |
118 | return NULL; | |
119 | } | |
120 | ||
8b201370 KM |
121 | int mptcp_userspace_pm_get_flags_and_ifindex_by_id(struct mptcp_sock *msk, |
122 | unsigned int id, | |
123 | u8 *flags, int *ifindex) | |
124 | { | |
06afe090 | 125 | struct mptcp_pm_addr_entry *match; |
8b201370 | 126 | |
8b201370 | 127 | spin_lock_bh(&msk->pm.lock); |
06afe090 | 128 | match = mptcp_userspace_pm_lookup_addr_by_id(msk, id); |
8b201370 KM |
129 | spin_unlock_bh(&msk->pm.lock); |
130 | if (match) { | |
131 | *flags = match->flags; | |
132 | *ifindex = match->ifindex; | |
133 | } | |
134 | ||
135 | return 0; | |
136 | } | |
137 | ||
138 | int mptcp_userspace_pm_get_local_id(struct mptcp_sock *msk, | |
139 | struct mptcp_addr_info *skc) | |
140 | { | |
f012d796 | 141 | struct mptcp_pm_addr_entry *entry = NULL, *e, new_entry; |
8b201370 KM |
142 | __be16 msk_sport = ((struct inet_sock *) |
143 | inet_sk((struct sock *)msk))->inet_sport; | |
144 | ||
f012d796 GT |
145 | spin_lock_bh(&msk->pm.lock); |
146 | list_for_each_entry(e, &msk->pm.userspace_pm_local_addr_list, list) { | |
147 | if (mptcp_addresses_equal(&e->addr, skc, false)) { | |
148 | entry = e; | |
149 | break; | |
150 | } | |
151 | } | |
152 | spin_unlock_bh(&msk->pm.lock); | |
153 | if (entry) | |
154 | return entry->addr.id; | |
155 | ||
8b201370 KM |
156 | memset(&new_entry, 0, sizeof(struct mptcp_pm_addr_entry)); |
157 | new_entry.addr = *skc; | |
158 | new_entry.addr.id = 0; | |
159 | new_entry.flags = MPTCP_PM_ADDR_FLAG_IMPLICIT; | |
160 | ||
161 | if (new_entry.addr.port == msk_sport) | |
162 | new_entry.addr.port = 0; | |
163 | ||
6c347be6 | 164 | return mptcp_userspace_pm_append_new_local_addr(msk, &new_entry, true); |
8b201370 | 165 | } |
9ab4807c | 166 | |
1e07938e | 167 | int mptcp_pm_nl_announce_doit(struct sk_buff *skb, struct genl_info *info) |
9ab4807c KM |
168 | { |
169 | struct nlattr *token = info->attrs[MPTCP_PM_ATTR_TOKEN]; | |
170 | struct nlattr *addr = info->attrs[MPTCP_PM_ATTR_ADDR]; | |
171 | struct mptcp_pm_addr_entry addr_val; | |
172 | struct mptcp_sock *msk; | |
173 | int err = -EINVAL; | |
14cb0e0b | 174 | struct sock *sk; |
9ab4807c KM |
175 | u32 token_val; |
176 | ||
177 | if (!addr || !token) { | |
178 | GENL_SET_ERR_MSG(info, "missing required inputs"); | |
179 | return err; | |
180 | } | |
181 | ||
182 | token_val = nla_get_u32(token); | |
183 | ||
184 | msk = mptcp_token_get_sock(sock_net(skb->sk), token_val); | |
185 | if (!msk) { | |
186 | NL_SET_ERR_MSG_ATTR(info->extack, token, "invalid token"); | |
187 | return err; | |
188 | } | |
189 | ||
14cb0e0b GT |
190 | sk = (struct sock *)msk; |
191 | ||
9ab4807c KM |
192 | if (!mptcp_pm_is_userspace(msk)) { |
193 | GENL_SET_ERR_MSG(info, "invalid request; userspace PM not selected"); | |
194 | goto announce_err; | |
195 | } | |
196 | ||
197 | err = mptcp_pm_parse_entry(addr, info, true, &addr_val); | |
198 | if (err < 0) { | |
199 | GENL_SET_ERR_MSG(info, "error parsing local address"); | |
200 | goto announce_err; | |
201 | } | |
202 | ||
203 | if (addr_val.addr.id == 0 || !(addr_val.flags & MPTCP_PM_ADDR_FLAG_SIGNAL)) { | |
204 | GENL_SET_ERR_MSG(info, "invalid addr id or flags"); | |
e0fe1123 | 205 | err = -EINVAL; |
9ab4807c KM |
206 | goto announce_err; |
207 | } | |
208 | ||
6c347be6 | 209 | err = mptcp_userspace_pm_append_new_local_addr(msk, &addr_val, false); |
9ab4807c KM |
210 | if (err < 0) { |
211 | GENL_SET_ERR_MSG(info, "did not match address and id"); | |
212 | goto announce_err; | |
213 | } | |
214 | ||
14cb0e0b | 215 | lock_sock(sk); |
9ab4807c KM |
216 | spin_lock_bh(&msk->pm.lock); |
217 | ||
528cb5f2 | 218 | if (mptcp_pm_alloc_anno_list(msk, &addr_val.addr)) { |
77e4b94a | 219 | msk->pm.add_addr_signaled++; |
9ab4807c KM |
220 | mptcp_pm_announce_addr(msk, &addr_val.addr, false); |
221 | mptcp_pm_nl_addr_send_ack(msk); | |
222 | } | |
223 | ||
224 | spin_unlock_bh(&msk->pm.lock); | |
14cb0e0b | 225 | release_sock(sk); |
9ab4807c KM |
226 | |
227 | err = 0; | |
228 | announce_err: | |
14cb0e0b | 229 | sock_put(sk); |
9ab4807c KM |
230 | return err; |
231 | } | |
d9a4594e | 232 | |
84c531f5 GT |
233 | static int mptcp_userspace_pm_remove_id_zero_address(struct mptcp_sock *msk, |
234 | struct genl_info *info) | |
235 | { | |
236 | struct mptcp_rm_list list = { .nr = 0 }; | |
237 | struct mptcp_subflow_context *subflow; | |
238 | struct sock *sk = (struct sock *)msk; | |
239 | bool has_id_0 = false; | |
240 | int err = -EINVAL; | |
241 | ||
242 | lock_sock(sk); | |
243 | mptcp_for_each_subflow(msk, subflow) { | |
a7cfe776 | 244 | if (READ_ONCE(subflow->local_id) == 0) { |
84c531f5 GT |
245 | has_id_0 = true; |
246 | break; | |
247 | } | |
248 | } | |
249 | if (!has_id_0) { | |
250 | GENL_SET_ERR_MSG(info, "address with id 0 not found"); | |
251 | goto remove_err; | |
252 | } | |
253 | ||
254 | list.ids[list.nr++] = 0; | |
255 | ||
256 | spin_lock_bh(&msk->pm.lock); | |
257 | mptcp_pm_remove_addr(msk, &list); | |
258 | spin_unlock_bh(&msk->pm.lock); | |
259 | ||
260 | err = 0; | |
261 | ||
262 | remove_err: | |
263 | release_sock(sk); | |
264 | return err; | |
265 | } | |
266 | ||
1e07938e | 267 | int mptcp_pm_nl_remove_doit(struct sk_buff *skb, struct genl_info *info) |
d9a4594e KM |
268 | { |
269 | struct nlattr *token = info->attrs[MPTCP_PM_ATTR_TOKEN]; | |
270 | struct nlattr *id = info->attrs[MPTCP_PM_ATTR_LOC_ID]; | |
06afe090 | 271 | struct mptcp_pm_addr_entry *match; |
d9a4594e KM |
272 | struct mptcp_pm_addr_entry *entry; |
273 | struct mptcp_sock *msk; | |
274 | LIST_HEAD(free_list); | |
275 | int err = -EINVAL; | |
14cb0e0b | 276 | struct sock *sk; |
d9a4594e KM |
277 | u32 token_val; |
278 | u8 id_val; | |
279 | ||
280 | if (!id || !token) { | |
281 | GENL_SET_ERR_MSG(info, "missing required inputs"); | |
282 | return err; | |
283 | } | |
284 | ||
285 | id_val = nla_get_u8(id); | |
286 | token_val = nla_get_u32(token); | |
287 | ||
288 | msk = mptcp_token_get_sock(sock_net(skb->sk), token_val); | |
289 | if (!msk) { | |
290 | NL_SET_ERR_MSG_ATTR(info->extack, token, "invalid token"); | |
291 | return err; | |
292 | } | |
293 | ||
14cb0e0b GT |
294 | sk = (struct sock *)msk; |
295 | ||
d9a4594e KM |
296 | if (!mptcp_pm_is_userspace(msk)) { |
297 | GENL_SET_ERR_MSG(info, "invalid request; userspace PM not selected"); | |
b3ac570a | 298 | goto out; |
d9a4594e KM |
299 | } |
300 | ||
84c531f5 GT |
301 | if (id_val == 0) { |
302 | err = mptcp_userspace_pm_remove_id_zero_address(msk, info); | |
b3ac570a | 303 | goto out; |
84c531f5 GT |
304 | } |
305 | ||
14cb0e0b | 306 | lock_sock(sk); |
d9a4594e | 307 | |
06afe090 | 308 | match = mptcp_userspace_pm_lookup_addr_by_id(msk, id_val); |
d9a4594e KM |
309 | if (!match) { |
310 | GENL_SET_ERR_MSG(info, "address with specified id not found"); | |
14cb0e0b | 311 | release_sock(sk); |
b3ac570a | 312 | goto out; |
d9a4594e KM |
313 | } |
314 | ||
315 | list_move(&match->list, &free_list); | |
316 | ||
8b1c94da | 317 | mptcp_pm_remove_addrs(msk, &free_list); |
d9a4594e | 318 | |
14cb0e0b | 319 | release_sock(sk); |
d9a4594e KM |
320 | |
321 | list_for_each_entry_safe(match, entry, &free_list, list) { | |
14cb0e0b | 322 | sock_kfree_s(sk, match, sizeof(*match)); |
d9a4594e KM |
323 | } |
324 | ||
325 | err = 0; | |
b3ac570a | 326 | out: |
14cb0e0b | 327 | sock_put(sk); |
d9a4594e KM |
328 | return err; |
329 | } | |
702c2f64 | 330 | |
1e07938e | 331 | int mptcp_pm_nl_subflow_create_doit(struct sk_buff *skb, struct genl_info *info) |
702c2f64 FW |
332 | { |
333 | struct nlattr *raddr = info->attrs[MPTCP_PM_ATTR_ADDR_REMOTE]; | |
334 | struct nlattr *token = info->attrs[MPTCP_PM_ATTR_TOKEN]; | |
335 | struct nlattr *laddr = info->attrs[MPTCP_PM_ATTR_ADDR]; | |
24430f8b | 336 | struct mptcp_pm_addr_entry local = { 0 }; |
702c2f64 | 337 | struct mptcp_addr_info addr_r; |
702c2f64 FW |
338 | struct mptcp_sock *msk; |
339 | int err = -EINVAL; | |
340 | struct sock *sk; | |
341 | u32 token_val; | |
342 | ||
343 | if (!laddr || !raddr || !token) { | |
344 | GENL_SET_ERR_MSG(info, "missing required inputs"); | |
345 | return err; | |
346 | } | |
347 | ||
348 | token_val = nla_get_u32(token); | |
349 | ||
350 | msk = mptcp_token_get_sock(genl_info_net(info), token_val); | |
351 | if (!msk) { | |
352 | NL_SET_ERR_MSG_ATTR(info->extack, token, "invalid token"); | |
353 | return err; | |
354 | } | |
355 | ||
a6c85fc6 GT |
356 | sk = (struct sock *)msk; |
357 | ||
702c2f64 FW |
358 | if (!mptcp_pm_is_userspace(msk)) { |
359 | GENL_SET_ERR_MSG(info, "invalid request; userspace PM not selected"); | |
360 | goto create_err; | |
361 | } | |
362 | ||
c19ee3c7 | 363 | err = mptcp_pm_parse_entry(laddr, info, true, &local); |
702c2f64 FW |
364 | if (err < 0) { |
365 | NL_SET_ERR_MSG_ATTR(info->extack, laddr, "error parsing local addr"); | |
366 | goto create_err; | |
367 | } | |
368 | ||
c19ee3c7 GT |
369 | if (local.flags & MPTCP_PM_ADDR_FLAG_SIGNAL) { |
370 | GENL_SET_ERR_MSG(info, "invalid addr flags"); | |
371 | err = -EINVAL; | |
372 | goto create_err; | |
373 | } | |
374 | local.flags |= MPTCP_PM_ADDR_FLAG_SUBFLOW; | |
375 | ||
702c2f64 FW |
376 | err = mptcp_pm_parse_addr(raddr, info, &addr_r); |
377 | if (err < 0) { | |
378 | NL_SET_ERR_MSG_ATTR(info->extack, raddr, "error parsing remote addr"); | |
379 | goto create_err; | |
380 | } | |
381 | ||
c19ee3c7 | 382 | if (!mptcp_pm_addr_families_match(sk, &local.addr, &addr_r)) { |
fb00ee4f MB |
383 | GENL_SET_ERR_MSG(info, "families mismatch"); |
384 | err = -EINVAL; | |
385 | goto create_err; | |
386 | } | |
387 | ||
6c347be6 | 388 | err = mptcp_userspace_pm_append_new_local_addr(msk, &local, false); |
24430f8b GT |
389 | if (err < 0) { |
390 | GENL_SET_ERR_MSG(info, "did not match address and id"); | |
391 | goto create_err; | |
392 | } | |
393 | ||
702c2f64 FW |
394 | lock_sock(sk); |
395 | ||
c19ee3c7 | 396 | err = __mptcp_subflow_connect(sk, &local.addr, &addr_r); |
702c2f64 FW |
397 | |
398 | release_sock(sk); | |
399 | ||
24430f8b GT |
400 | spin_lock_bh(&msk->pm.lock); |
401 | if (err) | |
402 | mptcp_userspace_pm_delete_local_addr(msk, &local); | |
77e4b94a GT |
403 | else |
404 | msk->pm.subflows++; | |
24430f8b GT |
405 | spin_unlock_bh(&msk->pm.lock); |
406 | ||
702c2f64 | 407 | create_err: |
a6c85fc6 | 408 | sock_put(sk); |
702c2f64 FW |
409 | return err; |
410 | } | |
411 | ||
412 | static struct sock *mptcp_nl_find_ssk(struct mptcp_sock *msk, | |
413 | const struct mptcp_addr_info *local, | |
414 | const struct mptcp_addr_info *remote) | |
415 | { | |
702c2f64 | 416 | struct mptcp_subflow_context *subflow; |
702c2f64 FW |
417 | |
418 | if (local->family != remote->family) | |
419 | return NULL; | |
420 | ||
702c2f64 FW |
421 | mptcp_for_each_subflow(msk, subflow) { |
422 | const struct inet_sock *issk; | |
423 | struct sock *ssk; | |
424 | ||
425 | ssk = mptcp_subflow_tcp_sock(subflow); | |
426 | ||
427 | if (local->family != ssk->sk_family) | |
428 | continue; | |
429 | ||
430 | issk = inet_sk(ssk); | |
431 | ||
432 | switch (ssk->sk_family) { | |
433 | case AF_INET: | |
434 | if (issk->inet_saddr != local->addr.s_addr || | |
435 | issk->inet_daddr != remote->addr.s_addr) | |
436 | continue; | |
437 | break; | |
438 | #if IS_ENABLED(CONFIG_MPTCP_IPV6) | |
439 | case AF_INET6: { | |
440 | const struct ipv6_pinfo *pinfo = inet6_sk(ssk); | |
441 | ||
442 | if (!ipv6_addr_equal(&local->addr6, &pinfo->saddr) || | |
443 | !ipv6_addr_equal(&remote->addr6, &ssk->sk_v6_daddr)) | |
444 | continue; | |
445 | break; | |
446 | } | |
447 | #endif | |
448 | default: | |
449 | continue; | |
450 | } | |
451 | ||
452 | if (issk->inet_sport == local->port && | |
5ccecaec PA |
453 | issk->inet_dport == remote->port) |
454 | return ssk; | |
702c2f64 FW |
455 | } |
456 | ||
5ccecaec | 457 | return NULL; |
702c2f64 FW |
458 | } |
459 | ||
1e07938e | 460 | int mptcp_pm_nl_subflow_destroy_doit(struct sk_buff *skb, struct genl_info *info) |
702c2f64 FW |
461 | { |
462 | struct nlattr *raddr = info->attrs[MPTCP_PM_ATTR_ADDR_REMOTE]; | |
463 | struct nlattr *token = info->attrs[MPTCP_PM_ATTR_TOKEN]; | |
464 | struct nlattr *laddr = info->attrs[MPTCP_PM_ATTR_ADDR]; | |
465 | struct mptcp_addr_info addr_l; | |
466 | struct mptcp_addr_info addr_r; | |
467 | struct mptcp_sock *msk; | |
468 | struct sock *sk, *ssk; | |
469 | int err = -EINVAL; | |
470 | u32 token_val; | |
471 | ||
472 | if (!laddr || !raddr || !token) { | |
473 | GENL_SET_ERR_MSG(info, "missing required inputs"); | |
474 | return err; | |
475 | } | |
476 | ||
477 | token_val = nla_get_u32(token); | |
478 | ||
479 | msk = mptcp_token_get_sock(genl_info_net(info), token_val); | |
480 | if (!msk) { | |
481 | NL_SET_ERR_MSG_ATTR(info->extack, token, "invalid token"); | |
482 | return err; | |
483 | } | |
484 | ||
a6c85fc6 GT |
485 | sk = (struct sock *)msk; |
486 | ||
702c2f64 FW |
487 | if (!mptcp_pm_is_userspace(msk)) { |
488 | GENL_SET_ERR_MSG(info, "invalid request; userspace PM not selected"); | |
489 | goto destroy_err; | |
490 | } | |
491 | ||
492 | err = mptcp_pm_parse_addr(laddr, info, &addr_l); | |
493 | if (err < 0) { | |
494 | NL_SET_ERR_MSG_ATTR(info->extack, laddr, "error parsing local addr"); | |
495 | goto destroy_err; | |
496 | } | |
497 | ||
498 | err = mptcp_pm_parse_addr(raddr, info, &addr_r); | |
499 | if (err < 0) { | |
500 | NL_SET_ERR_MSG_ATTR(info->extack, raddr, "error parsing remote addr"); | |
501 | goto destroy_err; | |
502 | } | |
503 | ||
535d620e GT |
504 | #if IS_ENABLED(CONFIG_MPTCP_IPV6) |
505 | if (addr_l.family == AF_INET && ipv6_addr_v4mapped(&addr_r.addr6)) { | |
506 | ipv6_addr_set_v4mapped(addr_l.addr.s_addr, &addr_l.addr6); | |
507 | addr_l.family = AF_INET6; | |
508 | } | |
509 | if (addr_r.family == AF_INET && ipv6_addr_v4mapped(&addr_l.addr6)) { | |
510 | ipv6_addr_set_v4mapped(addr_r.addr.s_addr, &addr_r.addr6); | |
511 | addr_r.family = AF_INET6; | |
512 | } | |
513 | #endif | |
702c2f64 FW |
514 | if (addr_l.family != addr_r.family) { |
515 | GENL_SET_ERR_MSG(info, "address families do not match"); | |
e0fe1123 | 516 | err = -EINVAL; |
702c2f64 FW |
517 | goto destroy_err; |
518 | } | |
519 | ||
520 | if (!addr_l.port || !addr_r.port) { | |
521 | GENL_SET_ERR_MSG(info, "missing local or remote port"); | |
e0fe1123 | 522 | err = -EINVAL; |
702c2f64 FW |
523 | goto destroy_err; |
524 | } | |
525 | ||
5ccecaec | 526 | lock_sock(sk); |
702c2f64 FW |
527 | ssk = mptcp_nl_find_ssk(msk, &addr_l, &addr_r); |
528 | if (ssk) { | |
529 | struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(ssk); | |
24430f8b | 530 | struct mptcp_pm_addr_entry entry = { .addr = addr_l }; |
702c2f64 | 531 | |
24430f8b GT |
532 | spin_lock_bh(&msk->pm.lock); |
533 | mptcp_userspace_pm_delete_local_addr(msk, &entry); | |
534 | spin_unlock_bh(&msk->pm.lock); | |
702c2f64 FW |
535 | mptcp_subflow_shutdown(sk, ssk, RCV_SHUTDOWN | SEND_SHUTDOWN); |
536 | mptcp_close_ssk(sk, ssk, subflow); | |
d2d21f17 | 537 | MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_RMSUBFLOW); |
702c2f64 FW |
538 | err = 0; |
539 | } else { | |
540 | err = -ESRCH; | |
541 | } | |
5ccecaec | 542 | release_sock(sk); |
702c2f64 | 543 | |
5ccecaec | 544 | destroy_err: |
a6c85fc6 | 545 | sock_put(sk); |
702c2f64 FW |
546 | return err; |
547 | } | |
892f396c | 548 | |
6a42477f | 549 | int mptcp_userspace_pm_set_flags(struct sk_buff *skb, struct genl_info *info) |
892f396c | 550 | { |
6a42477f GT |
551 | struct mptcp_pm_addr_entry loc = { .addr = { .family = AF_UNSPEC }, }; |
552 | struct mptcp_pm_addr_entry rem = { .addr = { .family = AF_UNSPEC }, }; | |
553 | struct nlattr *attr_rem = info->attrs[MPTCP_PM_ATTR_ADDR_REMOTE]; | |
554 | struct nlattr *token = info->attrs[MPTCP_PM_ATTR_TOKEN]; | |
555 | struct nlattr *attr = info->attrs[MPTCP_PM_ATTR_ADDR]; | |
556 | struct net *net = sock_net(skb->sk); | |
892f396c KM |
557 | struct mptcp_sock *msk; |
558 | int ret = -EINVAL; | |
14cb0e0b | 559 | struct sock *sk; |
892f396c | 560 | u32 token_val; |
6a42477f | 561 | u8 bkup = 0; |
892f396c KM |
562 | |
563 | token_val = nla_get_u32(token); | |
564 | ||
565 | msk = mptcp_token_get_sock(net, token_val); | |
a4d68b16 GT |
566 | if (!msk) { |
567 | NL_SET_ERR_MSG_ATTR(info->extack, token, "invalid token"); | |
892f396c | 568 | return ret; |
a4d68b16 | 569 | } |
892f396c | 570 | |
14cb0e0b GT |
571 | sk = (struct sock *)msk; |
572 | ||
a4d68b16 GT |
573 | if (!mptcp_pm_is_userspace(msk)) { |
574 | GENL_SET_ERR_MSG(info, "userspace PM not selected"); | |
892f396c | 575 | goto set_flags_err; |
a4d68b16 | 576 | } |
892f396c | 577 | |
6a42477f GT |
578 | ret = mptcp_pm_parse_entry(attr, info, false, &loc); |
579 | if (ret < 0) | |
892f396c KM |
580 | goto set_flags_err; |
581 | ||
6a42477f GT |
582 | if (attr_rem) { |
583 | ret = mptcp_pm_parse_entry(attr_rem, info, false, &rem); | |
584 | if (ret < 0) | |
585 | goto set_flags_err; | |
586 | } | |
587 | ||
588 | if (loc.addr.family == AF_UNSPEC || | |
589 | rem.addr.family == AF_UNSPEC) { | |
a4d68b16 | 590 | GENL_SET_ERR_MSG(info, "invalid address families"); |
6a42477f GT |
591 | ret = -EINVAL; |
592 | goto set_flags_err; | |
593 | } | |
594 | ||
595 | if (loc.flags & MPTCP_PM_ADDR_FLAG_BACKUP) | |
596 | bkup = 1; | |
597 | ||
14cb0e0b | 598 | lock_sock(sk); |
6a42477f | 599 | ret = mptcp_pm_nl_mp_prio_send_ack(msk, &loc.addr, &rem.addr, bkup); |
14cb0e0b | 600 | release_sock(sk); |
892f396c KM |
601 | |
602 | set_flags_err: | |
14cb0e0b | 603 | sock_put(sk); |
892f396c KM |
604 | return ret; |
605 | } | |
34e74a5c GT |
606 | |
607 | int mptcp_userspace_pm_dump_addr(struct sk_buff *msg, | |
608 | struct netlink_callback *cb) | |
609 | { | |
610 | struct id_bitmap { | |
611 | DECLARE_BITMAP(map, MPTCP_PM_MAX_ADDR_ID + 1); | |
612 | } *bitmap; | |
613 | const struct genl_info *info = genl_info_dump(cb); | |
614 | struct net *net = sock_net(msg->sk); | |
615 | struct mptcp_pm_addr_entry *entry; | |
616 | struct mptcp_sock *msk; | |
617 | struct nlattr *token; | |
618 | int ret = -EINVAL; | |
619 | struct sock *sk; | |
620 | void *hdr; | |
621 | ||
622 | bitmap = (struct id_bitmap *)cb->ctx; | |
623 | token = info->attrs[MPTCP_PM_ATTR_TOKEN]; | |
624 | ||
625 | msk = mptcp_token_get_sock(net, nla_get_u32(token)); | |
626 | if (!msk) { | |
627 | NL_SET_ERR_MSG_ATTR(info->extack, token, "invalid token"); | |
628 | return ret; | |
629 | } | |
630 | ||
631 | sk = (struct sock *)msk; | |
632 | ||
633 | if (!mptcp_pm_is_userspace(msk)) { | |
634 | GENL_SET_ERR_MSG(info, "invalid request; userspace PM not selected"); | |
635 | goto out; | |
636 | } | |
637 | ||
638 | lock_sock(sk); | |
639 | spin_lock_bh(&msk->pm.lock); | |
640 | list_for_each_entry(entry, &msk->pm.userspace_pm_local_addr_list, list) { | |
641 | if (test_bit(entry->addr.id, bitmap->map)) | |
642 | continue; | |
643 | ||
644 | hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid, | |
645 | cb->nlh->nlmsg_seq, &mptcp_genl_family, | |
646 | NLM_F_MULTI, MPTCP_PM_CMD_GET_ADDR); | |
647 | if (!hdr) | |
648 | break; | |
649 | ||
650 | if (mptcp_nl_fill_addr(msg, entry) < 0) { | |
651 | genlmsg_cancel(msg, hdr); | |
652 | break; | |
653 | } | |
654 | ||
655 | __set_bit(entry->addr.id, bitmap->map); | |
656 | genlmsg_end(msg, hdr); | |
657 | } | |
658 | spin_unlock_bh(&msk->pm.lock); | |
659 | release_sock(sk); | |
660 | ret = msg->len; | |
661 | ||
662 | out: | |
663 | sock_put(sk); | |
664 | return ret; | |
665 | } | |
d32c8fb1 GT |
666 | |
667 | int mptcp_userspace_pm_get_addr(struct sk_buff *skb, | |
668 | struct genl_info *info) | |
669 | { | |
670 | struct nlattr *attr = info->attrs[MPTCP_PM_ENDPOINT_ADDR]; | |
671 | struct nlattr *token = info->attrs[MPTCP_PM_ATTR_TOKEN]; | |
672 | struct mptcp_pm_addr_entry addr, *entry; | |
673 | struct net *net = sock_net(skb->sk); | |
674 | struct mptcp_sock *msk; | |
675 | struct sk_buff *msg; | |
676 | int ret = -EINVAL; | |
677 | struct sock *sk; | |
678 | void *reply; | |
679 | ||
680 | msk = mptcp_token_get_sock(net, nla_get_u32(token)); | |
681 | if (!msk) { | |
682 | NL_SET_ERR_MSG_ATTR(info->extack, token, "invalid token"); | |
683 | return ret; | |
684 | } | |
685 | ||
686 | sk = (struct sock *)msk; | |
687 | ||
688 | if (!mptcp_pm_is_userspace(msk)) { | |
689 | GENL_SET_ERR_MSG(info, "invalid request; userspace PM not selected"); | |
690 | goto out; | |
691 | } | |
692 | ||
693 | ret = mptcp_pm_parse_entry(attr, info, false, &addr); | |
694 | if (ret < 0) | |
695 | goto out; | |
696 | ||
697 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
698 | if (!msg) { | |
699 | ret = -ENOMEM; | |
700 | goto out; | |
701 | } | |
702 | ||
703 | reply = genlmsg_put_reply(msg, info, &mptcp_genl_family, 0, | |
704 | info->genlhdr->cmd); | |
705 | if (!reply) { | |
706 | GENL_SET_ERR_MSG(info, "not enough space in Netlink message"); | |
707 | ret = -EMSGSIZE; | |
708 | goto fail; | |
709 | } | |
710 | ||
711 | lock_sock(sk); | |
712 | spin_lock_bh(&msk->pm.lock); | |
713 | entry = mptcp_userspace_pm_lookup_addr_by_id(msk, addr.addr.id); | |
714 | if (!entry) { | |
715 | GENL_SET_ERR_MSG(info, "address not found"); | |
716 | ret = -EINVAL; | |
717 | goto unlock_fail; | |
718 | } | |
719 | ||
720 | ret = mptcp_nl_fill_addr(msg, entry); | |
721 | if (ret) | |
722 | goto unlock_fail; | |
723 | ||
724 | genlmsg_end(msg, reply); | |
725 | ret = genlmsg_reply(msg, info); | |
726 | spin_unlock_bh(&msk->pm.lock); | |
727 | release_sock(sk); | |
728 | sock_put(sk); | |
729 | return ret; | |
730 | ||
731 | unlock_fail: | |
732 | spin_unlock_bh(&msk->pm.lock); | |
733 | release_sock(sk); | |
734 | fail: | |
735 | nlmsg_free(msg); | |
736 | out: | |
737 | sock_put(sk); | |
738 | return ret; | |
739 | } |