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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * xfrm_state.c | |
3 | * | |
4 | * Changes: | |
5 | * Mitsuru KANDA @USAGI | |
6 | * Kazunori MIYAZAWA @USAGI | |
7 | * Kunihiro Ishiguro <kunihiro@ipinfusion.com> | |
8 | * IPv6 support | |
9 | * YOSHIFUJI Hideaki @USAGI | |
10 | * Split up af-specific functions | |
11 | * Derek Atkins <derek@ihtfp.com> | |
12 | * Add UDP Encapsulation | |
df71837d | 13 | * |
1da177e4 LT |
14 | */ |
15 | ||
16 | #include <linux/workqueue.h> | |
17 | #include <net/xfrm.h> | |
18 | #include <linux/pfkeyv2.h> | |
19 | #include <linux/ipsec.h> | |
20 | #include <linux/module.h> | |
f034b5d4 | 21 | #include <linux/cache.h> |
68277acc | 22 | #include <linux/audit.h> |
b5890d8b | 23 | #include <asm/uaccess.h> |
9e0d57fd | 24 | #include <linux/ktime.h> |
5a0e3ad6 | 25 | #include <linux/slab.h> |
9e0d57fd YP |
26 | #include <linux/interrupt.h> |
27 | #include <linux/kernel.h> | |
1da177e4 | 28 | |
44e36b42 DM |
29 | #include "xfrm_hash.h" |
30 | ||
1da177e4 LT |
31 | /* Each xfrm_state may be linked to two tables: |
32 | ||
33 | 1. Hash table by (spi,daddr,ah/esp) to find SA by SPI. (input,ctl) | |
a624c108 | 34 | 2. Hash table by (daddr,family,reqid) to find what SAs exist for given |
1da177e4 LT |
35 | destination/tunnel endpoint. (output) |
36 | */ | |
37 | ||
f034b5d4 | 38 | static unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024; |
f034b5d4 | 39 | |
02efdff7 FW |
40 | static inline bool xfrm_state_hold_rcu(struct xfrm_state __rcu *x) |
41 | { | |
42 | return atomic_inc_not_zero(&x->refcnt); | |
43 | } | |
44 | ||
64d0cd00 | 45 | static inline unsigned int xfrm_dst_hash(struct net *net, |
2ab38503 DM |
46 | const xfrm_address_t *daddr, |
47 | const xfrm_address_t *saddr, | |
c1969f29 | 48 | u32 reqid, |
a624c108 | 49 | unsigned short family) |
f034b5d4 | 50 | { |
64d0cd00 | 51 | return __xfrm_dst_hash(daddr, saddr, reqid, family, net->xfrm.state_hmask); |
f034b5d4 DM |
52 | } |
53 | ||
64d0cd00 | 54 | static inline unsigned int xfrm_src_hash(struct net *net, |
2ab38503 DM |
55 | const xfrm_address_t *daddr, |
56 | const xfrm_address_t *saddr, | |
44e36b42 | 57 | unsigned short family) |
f034b5d4 | 58 | { |
64d0cd00 | 59 | return __xfrm_src_hash(daddr, saddr, family, net->xfrm.state_hmask); |
f034b5d4 DM |
60 | } |
61 | ||
f034b5d4 | 62 | static inline unsigned int |
2ab38503 DM |
63 | xfrm_spi_hash(struct net *net, const xfrm_address_t *daddr, |
64 | __be32 spi, u8 proto, unsigned short family) | |
f034b5d4 | 65 | { |
64d0cd00 | 66 | return __xfrm_spi_hash(daddr, spi, proto, family, net->xfrm.state_hmask); |
f034b5d4 DM |
67 | } |
68 | ||
f034b5d4 DM |
69 | static void xfrm_hash_transfer(struct hlist_head *list, |
70 | struct hlist_head *ndsttable, | |
71 | struct hlist_head *nsrctable, | |
72 | struct hlist_head *nspitable, | |
73 | unsigned int nhashmask) | |
74 | { | |
b67bfe0d | 75 | struct hlist_node *tmp; |
f034b5d4 DM |
76 | struct xfrm_state *x; |
77 | ||
b67bfe0d | 78 | hlist_for_each_entry_safe(x, tmp, list, bydst) { |
f034b5d4 DM |
79 | unsigned int h; |
80 | ||
c1969f29 DM |
81 | h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr, |
82 | x->props.reqid, x->props.family, | |
83 | nhashmask); | |
ae3fb6d3 | 84 | hlist_add_head_rcu(&x->bydst, ndsttable + h); |
f034b5d4 | 85 | |
667bbcb6 MN |
86 | h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr, |
87 | x->props.family, | |
f034b5d4 | 88 | nhashmask); |
ae3fb6d3 | 89 | hlist_add_head_rcu(&x->bysrc, nsrctable + h); |
f034b5d4 | 90 | |
7b4dc360 MN |
91 | if (x->id.spi) { |
92 | h = __xfrm_spi_hash(&x->id.daddr, x->id.spi, | |
93 | x->id.proto, x->props.family, | |
94 | nhashmask); | |
ae3fb6d3 | 95 | hlist_add_head_rcu(&x->byspi, nspitable + h); |
7b4dc360 | 96 | } |
f034b5d4 DM |
97 | } |
98 | } | |
99 | ||
63082733 | 100 | static unsigned long xfrm_hash_new_size(unsigned int state_hmask) |
f034b5d4 | 101 | { |
63082733 | 102 | return ((state_hmask + 1) << 1) * sizeof(struct hlist_head); |
f034b5d4 DM |
103 | } |
104 | ||
63082733 | 105 | static void xfrm_hash_resize(struct work_struct *work) |
f034b5d4 | 106 | { |
63082733 | 107 | struct net *net = container_of(work, struct net, xfrm.state_hash_work); |
f034b5d4 DM |
108 | struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi; |
109 | unsigned long nsize, osize; | |
110 | unsigned int nhashmask, ohashmask; | |
111 | int i; | |
112 | ||
63082733 | 113 | nsize = xfrm_hash_new_size(net->xfrm.state_hmask); |
44e36b42 | 114 | ndst = xfrm_hash_alloc(nsize); |
f034b5d4 | 115 | if (!ndst) |
0244790c | 116 | return; |
44e36b42 | 117 | nsrc = xfrm_hash_alloc(nsize); |
f034b5d4 | 118 | if (!nsrc) { |
44e36b42 | 119 | xfrm_hash_free(ndst, nsize); |
0244790c | 120 | return; |
f034b5d4 | 121 | } |
44e36b42 | 122 | nspi = xfrm_hash_alloc(nsize); |
f034b5d4 | 123 | if (!nspi) { |
44e36b42 DM |
124 | xfrm_hash_free(ndst, nsize); |
125 | xfrm_hash_free(nsrc, nsize); | |
0244790c | 126 | return; |
f034b5d4 DM |
127 | } |
128 | ||
283bc9f3 | 129 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
f034b5d4 DM |
130 | |
131 | nhashmask = (nsize / sizeof(struct hlist_head)) - 1U; | |
63082733 AD |
132 | for (i = net->xfrm.state_hmask; i >= 0; i--) |
133 | xfrm_hash_transfer(net->xfrm.state_bydst+i, ndst, nsrc, nspi, | |
f034b5d4 DM |
134 | nhashmask); |
135 | ||
63082733 AD |
136 | odst = net->xfrm.state_bydst; |
137 | osrc = net->xfrm.state_bysrc; | |
138 | ospi = net->xfrm.state_byspi; | |
139 | ohashmask = net->xfrm.state_hmask; | |
f034b5d4 | 140 | |
63082733 AD |
141 | net->xfrm.state_bydst = ndst; |
142 | net->xfrm.state_bysrc = nsrc; | |
143 | net->xfrm.state_byspi = nspi; | |
144 | net->xfrm.state_hmask = nhashmask; | |
f034b5d4 | 145 | |
283bc9f3 | 146 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
f034b5d4 DM |
147 | |
148 | osize = (ohashmask + 1) * sizeof(struct hlist_head); | |
44e36b42 DM |
149 | xfrm_hash_free(odst, osize); |
150 | xfrm_hash_free(osrc, osize); | |
151 | xfrm_hash_free(ospi, osize); | |
f034b5d4 DM |
152 | } |
153 | ||
44abdc30 CW |
154 | static DEFINE_SPINLOCK(xfrm_state_afinfo_lock); |
155 | static struct xfrm_state_afinfo __rcu *xfrm_state_afinfo[NPROTO]; | |
1da177e4 | 156 | |
1da177e4 LT |
157 | static DEFINE_SPINLOCK(xfrm_state_gc_lock); |
158 | ||
53bc6b4d | 159 | int __xfrm_state_delete(struct xfrm_state *x); |
1da177e4 | 160 | |
980ebd25 | 161 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); |
0f24558e | 162 | bool km_is_alive(const struct km_event *c); |
15e47304 | 163 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid); |
1da177e4 | 164 | |
7a9885b9 | 165 | static DEFINE_SPINLOCK(xfrm_type_lock); |
533cb5b0 | 166 | int xfrm_register_type(const struct xfrm_type *type, unsigned short family) |
aa5d62cc | 167 | { |
7a9885b9 | 168 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); |
533cb5b0 | 169 | const struct xfrm_type **typemap; |
aa5d62cc HX |
170 | int err = 0; |
171 | ||
172 | if (unlikely(afinfo == NULL)) | |
173 | return -EAFNOSUPPORT; | |
174 | typemap = afinfo->type_map; | |
7a9885b9 | 175 | spin_lock_bh(&xfrm_type_lock); |
aa5d62cc HX |
176 | |
177 | if (likely(typemap[type->proto] == NULL)) | |
178 | typemap[type->proto] = type; | |
179 | else | |
180 | err = -EEXIST; | |
7a9885b9 CW |
181 | spin_unlock_bh(&xfrm_type_lock); |
182 | xfrm_state_put_afinfo(afinfo); | |
aa5d62cc HX |
183 | return err; |
184 | } | |
185 | EXPORT_SYMBOL(xfrm_register_type); | |
186 | ||
533cb5b0 | 187 | int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family) |
aa5d62cc | 188 | { |
7a9885b9 | 189 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); |
533cb5b0 | 190 | const struct xfrm_type **typemap; |
aa5d62cc HX |
191 | int err = 0; |
192 | ||
193 | if (unlikely(afinfo == NULL)) | |
194 | return -EAFNOSUPPORT; | |
195 | typemap = afinfo->type_map; | |
7a9885b9 | 196 | spin_lock_bh(&xfrm_type_lock); |
aa5d62cc HX |
197 | |
198 | if (unlikely(typemap[type->proto] != type)) | |
199 | err = -ENOENT; | |
200 | else | |
201 | typemap[type->proto] = NULL; | |
7a9885b9 CW |
202 | spin_unlock_bh(&xfrm_type_lock); |
203 | xfrm_state_put_afinfo(afinfo); | |
aa5d62cc HX |
204 | return err; |
205 | } | |
206 | EXPORT_SYMBOL(xfrm_unregister_type); | |
207 | ||
533cb5b0 | 208 | static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family) |
aa5d62cc HX |
209 | { |
210 | struct xfrm_state_afinfo *afinfo; | |
533cb5b0 ED |
211 | const struct xfrm_type **typemap; |
212 | const struct xfrm_type *type; | |
aa5d62cc HX |
213 | int modload_attempted = 0; |
214 | ||
215 | retry: | |
216 | afinfo = xfrm_state_get_afinfo(family); | |
217 | if (unlikely(afinfo == NULL)) | |
218 | return NULL; | |
219 | typemap = afinfo->type_map; | |
220 | ||
221 | type = typemap[proto]; | |
222 | if (unlikely(type && !try_module_get(type->owner))) | |
223 | type = NULL; | |
224 | if (!type && !modload_attempted) { | |
225 | xfrm_state_put_afinfo(afinfo); | |
226 | request_module("xfrm-type-%d-%d", family, proto); | |
227 | modload_attempted = 1; | |
228 | goto retry; | |
229 | } | |
230 | ||
231 | xfrm_state_put_afinfo(afinfo); | |
232 | return type; | |
233 | } | |
234 | ||
533cb5b0 | 235 | static void xfrm_put_type(const struct xfrm_type *type) |
aa5d62cc HX |
236 | { |
237 | module_put(type->owner); | |
238 | } | |
239 | ||
7a9885b9 | 240 | static DEFINE_SPINLOCK(xfrm_mode_lock); |
aa5d62cc HX |
241 | int xfrm_register_mode(struct xfrm_mode *mode, int family) |
242 | { | |
243 | struct xfrm_state_afinfo *afinfo; | |
244 | struct xfrm_mode **modemap; | |
245 | int err; | |
246 | ||
247 | if (unlikely(mode->encap >= XFRM_MODE_MAX)) | |
248 | return -EINVAL; | |
249 | ||
7a9885b9 | 250 | afinfo = xfrm_state_get_afinfo(family); |
aa5d62cc HX |
251 | if (unlikely(afinfo == NULL)) |
252 | return -EAFNOSUPPORT; | |
253 | ||
254 | err = -EEXIST; | |
255 | modemap = afinfo->mode_map; | |
7a9885b9 | 256 | spin_lock_bh(&xfrm_mode_lock); |
17c2a42a HX |
257 | if (modemap[mode->encap]) |
258 | goto out; | |
aa5d62cc | 259 | |
17c2a42a HX |
260 | err = -ENOENT; |
261 | if (!try_module_get(afinfo->owner)) | |
262 | goto out; | |
263 | ||
264 | mode->afinfo = afinfo; | |
265 | modemap[mode->encap] = mode; | |
266 | err = 0; | |
267 | ||
268 | out: | |
7a9885b9 CW |
269 | spin_unlock_bh(&xfrm_mode_lock); |
270 | xfrm_state_put_afinfo(afinfo); | |
aa5d62cc HX |
271 | return err; |
272 | } | |
273 | EXPORT_SYMBOL(xfrm_register_mode); | |
274 | ||
275 | int xfrm_unregister_mode(struct xfrm_mode *mode, int family) | |
276 | { | |
277 | struct xfrm_state_afinfo *afinfo; | |
278 | struct xfrm_mode **modemap; | |
279 | int err; | |
280 | ||
281 | if (unlikely(mode->encap >= XFRM_MODE_MAX)) | |
282 | return -EINVAL; | |
283 | ||
7a9885b9 | 284 | afinfo = xfrm_state_get_afinfo(family); |
aa5d62cc HX |
285 | if (unlikely(afinfo == NULL)) |
286 | return -EAFNOSUPPORT; | |
287 | ||
288 | err = -ENOENT; | |
289 | modemap = afinfo->mode_map; | |
7a9885b9 | 290 | spin_lock_bh(&xfrm_mode_lock); |
aa5d62cc HX |
291 | if (likely(modemap[mode->encap] == mode)) { |
292 | modemap[mode->encap] = NULL; | |
17c2a42a | 293 | module_put(mode->afinfo->owner); |
aa5d62cc HX |
294 | err = 0; |
295 | } | |
296 | ||
7a9885b9 CW |
297 | spin_unlock_bh(&xfrm_mode_lock); |
298 | xfrm_state_put_afinfo(afinfo); | |
aa5d62cc HX |
299 | return err; |
300 | } | |
301 | EXPORT_SYMBOL(xfrm_unregister_mode); | |
302 | ||
303 | static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family) | |
304 | { | |
305 | struct xfrm_state_afinfo *afinfo; | |
306 | struct xfrm_mode *mode; | |
307 | int modload_attempted = 0; | |
308 | ||
309 | if (unlikely(encap >= XFRM_MODE_MAX)) | |
310 | return NULL; | |
311 | ||
312 | retry: | |
313 | afinfo = xfrm_state_get_afinfo(family); | |
314 | if (unlikely(afinfo == NULL)) | |
315 | return NULL; | |
316 | ||
317 | mode = afinfo->mode_map[encap]; | |
318 | if (unlikely(mode && !try_module_get(mode->owner))) | |
319 | mode = NULL; | |
320 | if (!mode && !modload_attempted) { | |
321 | xfrm_state_put_afinfo(afinfo); | |
322 | request_module("xfrm-mode-%d-%d", family, encap); | |
323 | modload_attempted = 1; | |
324 | goto retry; | |
325 | } | |
326 | ||
327 | xfrm_state_put_afinfo(afinfo); | |
328 | return mode; | |
329 | } | |
330 | ||
331 | static void xfrm_put_mode(struct xfrm_mode *mode) | |
332 | { | |
333 | module_put(mode->owner); | |
334 | } | |
335 | ||
1da177e4 LT |
336 | static void xfrm_state_gc_destroy(struct xfrm_state *x) |
337 | { | |
9e0d57fd | 338 | tasklet_hrtimer_cancel(&x->mtimer); |
a47f0ce0 | 339 | del_timer_sync(&x->rtimer); |
a51482bd JJ |
340 | kfree(x->aalg); |
341 | kfree(x->ealg); | |
342 | kfree(x->calg); | |
343 | kfree(x->encap); | |
060f02a3 | 344 | kfree(x->coaddr); |
d8647b79 SK |
345 | kfree(x->replay_esn); |
346 | kfree(x->preplay_esn); | |
13996378 HX |
347 | if (x->inner_mode) |
348 | xfrm_put_mode(x->inner_mode); | |
df9dcb45 KM |
349 | if (x->inner_mode_iaf) |
350 | xfrm_put_mode(x->inner_mode_iaf); | |
13996378 HX |
351 | if (x->outer_mode) |
352 | xfrm_put_mode(x->outer_mode); | |
1da177e4 LT |
353 | if (x->type) { |
354 | x->type->destructor(x); | |
355 | xfrm_put_type(x->type); | |
356 | } | |
df71837d | 357 | security_xfrm_state_free(x); |
1da177e4 LT |
358 | kfree(x); |
359 | } | |
360 | ||
c7837144 | 361 | static void xfrm_state_gc_task(struct work_struct *work) |
1da177e4 | 362 | { |
c7837144 | 363 | struct net *net = container_of(work, struct net, xfrm.state_gc_work); |
12a169e7 | 364 | struct xfrm_state *x; |
b67bfe0d | 365 | struct hlist_node *tmp; |
12a169e7 | 366 | struct hlist_head gc_list; |
1da177e4 | 367 | |
1da177e4 | 368 | spin_lock_bh(&xfrm_state_gc_lock); |
c7837144 | 369 | hlist_move_list(&net->xfrm.state_gc_list, &gc_list); |
1da177e4 LT |
370 | spin_unlock_bh(&xfrm_state_gc_lock); |
371 | ||
b67bfe0d | 372 | hlist_for_each_entry_safe(x, tmp, &gc_list, gclist) |
1da177e4 | 373 | xfrm_state_gc_destroy(x); |
1da177e4 LT |
374 | } |
375 | ||
376 | static inline unsigned long make_jiffies(long secs) | |
377 | { | |
378 | if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ) | |
379 | return MAX_SCHEDULE_TIMEOUT-1; | |
380 | else | |
a716c119 | 381 | return secs*HZ; |
1da177e4 LT |
382 | } |
383 | ||
3e94c2dc | 384 | static enum hrtimer_restart xfrm_timer_handler(struct hrtimer *me) |
1da177e4 | 385 | { |
9e0d57fd YP |
386 | struct tasklet_hrtimer *thr = container_of(me, struct tasklet_hrtimer, timer); |
387 | struct xfrm_state *x = container_of(thr, struct xfrm_state, mtimer); | |
9d729f72 | 388 | unsigned long now = get_seconds(); |
1da177e4 LT |
389 | long next = LONG_MAX; |
390 | int warn = 0; | |
161a09e7 | 391 | int err = 0; |
1da177e4 LT |
392 | |
393 | spin_lock(&x->lock); | |
394 | if (x->km.state == XFRM_STATE_DEAD) | |
395 | goto out; | |
396 | if (x->km.state == XFRM_STATE_EXPIRED) | |
397 | goto expired; | |
398 | if (x->lft.hard_add_expires_seconds) { | |
399 | long tmo = x->lft.hard_add_expires_seconds + | |
400 | x->curlft.add_time - now; | |
e3c0d047 FD |
401 | if (tmo <= 0) { |
402 | if (x->xflags & XFRM_SOFT_EXPIRE) { | |
403 | /* enter hard expire without soft expire first?! | |
404 | * setting a new date could trigger this. | |
405 | * workarbound: fix x->curflt.add_time by below: | |
406 | */ | |
407 | x->curlft.add_time = now - x->saved_tmo - 1; | |
408 | tmo = x->lft.hard_add_expires_seconds - x->saved_tmo; | |
409 | } else | |
410 | goto expired; | |
411 | } | |
1da177e4 LT |
412 | if (tmo < next) |
413 | next = tmo; | |
414 | } | |
415 | if (x->lft.hard_use_expires_seconds) { | |
416 | long tmo = x->lft.hard_use_expires_seconds + | |
417 | (x->curlft.use_time ? : now) - now; | |
418 | if (tmo <= 0) | |
419 | goto expired; | |
420 | if (tmo < next) | |
421 | next = tmo; | |
422 | } | |
423 | if (x->km.dying) | |
424 | goto resched; | |
425 | if (x->lft.soft_add_expires_seconds) { | |
426 | long tmo = x->lft.soft_add_expires_seconds + | |
427 | x->curlft.add_time - now; | |
e3c0d047 | 428 | if (tmo <= 0) { |
1da177e4 | 429 | warn = 1; |
e3c0d047 FD |
430 | x->xflags &= ~XFRM_SOFT_EXPIRE; |
431 | } else if (tmo < next) { | |
1da177e4 | 432 | next = tmo; |
e3c0d047 FD |
433 | x->xflags |= XFRM_SOFT_EXPIRE; |
434 | x->saved_tmo = tmo; | |
435 | } | |
1da177e4 LT |
436 | } |
437 | if (x->lft.soft_use_expires_seconds) { | |
438 | long tmo = x->lft.soft_use_expires_seconds + | |
439 | (x->curlft.use_time ? : now) - now; | |
440 | if (tmo <= 0) | |
441 | warn = 1; | |
442 | else if (tmo < next) | |
443 | next = tmo; | |
444 | } | |
445 | ||
4666faab | 446 | x->km.dying = warn; |
1da177e4 | 447 | if (warn) |
53bc6b4d | 448 | km_state_expired(x, 0, 0); |
1da177e4 | 449 | resched: |
9b7a787d | 450 | if (next != LONG_MAX) { |
9e0d57fd YP |
451 | tasklet_hrtimer_start(&x->mtimer, ktime_set(next, 0), HRTIMER_MODE_REL); |
452 | } | |
a47f0ce0 | 453 | |
1da177e4 LT |
454 | goto out; |
455 | ||
456 | expired: | |
5b8ef341 | 457 | if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) |
1da177e4 | 458 | x->km.state = XFRM_STATE_EXPIRED; |
161a09e7 JL |
459 | |
460 | err = __xfrm_state_delete(x); | |
0806ae4c | 461 | if (!err) |
53bc6b4d | 462 | km_state_expired(x, 1, 0); |
1da177e4 | 463 | |
2e71029e | 464 | xfrm_audit_state_delete(x, err ? 0 : 1, true); |
161a09e7 | 465 | |
1da177e4 LT |
466 | out: |
467 | spin_unlock(&x->lock); | |
9e0d57fd | 468 | return HRTIMER_NORESTART; |
1da177e4 LT |
469 | } |
470 | ||
0ac84752 DM |
471 | static void xfrm_replay_timer_handler(unsigned long data); |
472 | ||
673c09be | 473 | struct xfrm_state *xfrm_state_alloc(struct net *net) |
1da177e4 LT |
474 | { |
475 | struct xfrm_state *x; | |
476 | ||
0da974f4 | 477 | x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC); |
1da177e4 LT |
478 | |
479 | if (x) { | |
673c09be | 480 | write_pnet(&x->xs_net, net); |
1da177e4 LT |
481 | atomic_set(&x->refcnt, 1); |
482 | atomic_set(&x->tunnel_users, 0); | |
12a169e7 | 483 | INIT_LIST_HEAD(&x->km.all); |
8f126e37 DM |
484 | INIT_HLIST_NODE(&x->bydst); |
485 | INIT_HLIST_NODE(&x->bysrc); | |
486 | INIT_HLIST_NODE(&x->byspi); | |
99565a6c FD |
487 | tasklet_hrtimer_init(&x->mtimer, xfrm_timer_handler, |
488 | CLOCK_BOOTTIME, HRTIMER_MODE_ABS); | |
b24b8a24 PE |
489 | setup_timer(&x->rtimer, xfrm_replay_timer_handler, |
490 | (unsigned long)x); | |
9d729f72 | 491 | x->curlft.add_time = get_seconds(); |
1da177e4 LT |
492 | x->lft.soft_byte_limit = XFRM_INF; |
493 | x->lft.soft_packet_limit = XFRM_INF; | |
494 | x->lft.hard_byte_limit = XFRM_INF; | |
495 | x->lft.hard_packet_limit = XFRM_INF; | |
f8cd5488 JHS |
496 | x->replay_maxage = 0; |
497 | x->replay_maxdiff = 0; | |
df9dcb45 KM |
498 | x->inner_mode = NULL; |
499 | x->inner_mode_iaf = NULL; | |
1da177e4 LT |
500 | spin_lock_init(&x->lock); |
501 | } | |
502 | return x; | |
503 | } | |
504 | EXPORT_SYMBOL(xfrm_state_alloc); | |
505 | ||
506 | void __xfrm_state_destroy(struct xfrm_state *x) | |
507 | { | |
98806f75 AD |
508 | struct net *net = xs_net(x); |
509 | ||
547b792c | 510 | WARN_ON(x->km.state != XFRM_STATE_DEAD); |
1da177e4 LT |
511 | |
512 | spin_lock_bh(&xfrm_state_gc_lock); | |
98806f75 | 513 | hlist_add_head(&x->gclist, &net->xfrm.state_gc_list); |
1da177e4 | 514 | spin_unlock_bh(&xfrm_state_gc_lock); |
98806f75 | 515 | schedule_work(&net->xfrm.state_gc_work); |
1da177e4 LT |
516 | } |
517 | EXPORT_SYMBOL(__xfrm_state_destroy); | |
518 | ||
53bc6b4d | 519 | int __xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 520 | { |
98806f75 | 521 | struct net *net = xs_net(x); |
26b15dad JHS |
522 | int err = -ESRCH; |
523 | ||
1da177e4 LT |
524 | if (x->km.state != XFRM_STATE_DEAD) { |
525 | x->km.state = XFRM_STATE_DEAD; | |
283bc9f3 | 526 | spin_lock(&net->xfrm.xfrm_state_lock); |
12a169e7 | 527 | list_del(&x->km.all); |
ae3fb6d3 FW |
528 | hlist_del_rcu(&x->bydst); |
529 | hlist_del_rcu(&x->bysrc); | |
a47f0ce0 | 530 | if (x->id.spi) |
ae3fb6d3 | 531 | hlist_del_rcu(&x->byspi); |
98806f75 | 532 | net->xfrm.state_num--; |
283bc9f3 | 533 | spin_unlock(&net->xfrm.xfrm_state_lock); |
1da177e4 | 534 | |
1da177e4 LT |
535 | /* All xfrm_state objects are created by xfrm_state_alloc. |
536 | * The xfrm_state_alloc call gives a reference, and that | |
537 | * is what we are dropping here. | |
538 | */ | |
5dba4797 | 539 | xfrm_state_put(x); |
26b15dad | 540 | err = 0; |
1da177e4 | 541 | } |
26b15dad JHS |
542 | |
543 | return err; | |
1da177e4 | 544 | } |
53bc6b4d | 545 | EXPORT_SYMBOL(__xfrm_state_delete); |
1da177e4 | 546 | |
26b15dad | 547 | int xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 548 | { |
26b15dad JHS |
549 | int err; |
550 | ||
1da177e4 | 551 | spin_lock_bh(&x->lock); |
26b15dad | 552 | err = __xfrm_state_delete(x); |
1da177e4 | 553 | spin_unlock_bh(&x->lock); |
26b15dad JHS |
554 | |
555 | return err; | |
1da177e4 LT |
556 | } |
557 | EXPORT_SYMBOL(xfrm_state_delete); | |
558 | ||
4aa2e62c JL |
559 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
560 | static inline int | |
2e71029e | 561 | xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid) |
1da177e4 | 562 | { |
4aa2e62c JL |
563 | int i, err = 0; |
564 | ||
0e602451 | 565 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
4aa2e62c JL |
566 | struct xfrm_state *x; |
567 | ||
b67bfe0d | 568 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
4aa2e62c JL |
569 | if (xfrm_id_proto_match(x->id.proto, proto) && |
570 | (err = security_xfrm_state_delete(x)) != 0) { | |
2e71029e | 571 | xfrm_audit_state_delete(x, 0, task_valid); |
4aa2e62c JL |
572 | return err; |
573 | } | |
574 | } | |
575 | } | |
576 | ||
577 | return err; | |
578 | } | |
579 | #else | |
580 | static inline int | |
2e71029e | 581 | xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid) |
4aa2e62c JL |
582 | { |
583 | return 0; | |
584 | } | |
585 | #endif | |
586 | ||
2e71029e | 587 | int xfrm_state_flush(struct net *net, u8 proto, bool task_valid) |
4aa2e62c | 588 | { |
9e64cc95 | 589 | int i, err = 0, cnt = 0; |
1da177e4 | 590 | |
283bc9f3 | 591 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
2e71029e | 592 | err = xfrm_state_flush_secctx_check(net, proto, task_valid); |
4aa2e62c JL |
593 | if (err) |
594 | goto out; | |
595 | ||
9e64cc95 | 596 | err = -ESRCH; |
0e602451 | 597 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
8f126e37 | 598 | struct xfrm_state *x; |
1da177e4 | 599 | restart: |
b67bfe0d | 600 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
1da177e4 | 601 | if (!xfrm_state_kern(x) && |
5794708f | 602 | xfrm_id_proto_match(x->id.proto, proto)) { |
1da177e4 | 603 | xfrm_state_hold(x); |
283bc9f3 | 604 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 605 | |
161a09e7 | 606 | err = xfrm_state_delete(x); |
ab5f5e8b | 607 | xfrm_audit_state_delete(x, err ? 0 : 1, |
2e71029e | 608 | task_valid); |
1da177e4 | 609 | xfrm_state_put(x); |
9e64cc95 JHS |
610 | if (!err) |
611 | cnt++; | |
1da177e4 | 612 | |
283bc9f3 | 613 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
614 | goto restart; |
615 | } | |
616 | } | |
617 | } | |
9e64cc95 JHS |
618 | if (cnt) |
619 | err = 0; | |
4aa2e62c JL |
620 | |
621 | out: | |
283bc9f3 | 622 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
4aa2e62c | 623 | return err; |
1da177e4 LT |
624 | } |
625 | EXPORT_SYMBOL(xfrm_state_flush); | |
626 | ||
e071041b | 627 | void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si) |
28d8909b | 628 | { |
283bc9f3 | 629 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
e071041b AD |
630 | si->sadcnt = net->xfrm.state_num; |
631 | si->sadhcnt = net->xfrm.state_hmask; | |
28d8909b | 632 | si->sadhmcnt = xfrm_state_hashmax; |
283bc9f3 | 633 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
28d8909b JHS |
634 | } |
635 | EXPORT_SYMBOL(xfrm_sad_getinfo); | |
636 | ||
1da177e4 | 637 | static int |
1a898592 | 638 | xfrm_init_tempstate(struct xfrm_state *x, const struct flowi *fl, |
04686013 | 639 | const struct xfrm_tmpl *tmpl, |
33765d06 | 640 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
8444cf71 | 641 | unsigned short family) |
1da177e4 LT |
642 | { |
643 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
644 | if (!afinfo) | |
645 | return -1; | |
8444cf71 TE |
646 | afinfo->init_tempsel(&x->sel, fl); |
647 | ||
648 | if (family != tmpl->encap_family) { | |
649 | xfrm_state_put_afinfo(afinfo); | |
650 | afinfo = xfrm_state_get_afinfo(tmpl->encap_family); | |
651 | if (!afinfo) | |
652 | return -1; | |
653 | } | |
654 | afinfo->init_temprop(x, tmpl, daddr, saddr); | |
1da177e4 LT |
655 | xfrm_state_put_afinfo(afinfo); |
656 | return 0; | |
657 | } | |
658 | ||
9aa60088 DM |
659 | static struct xfrm_state *__xfrm_state_lookup(struct net *net, u32 mark, |
660 | const xfrm_address_t *daddr, | |
661 | __be32 spi, u8 proto, | |
662 | unsigned short family) | |
edcd5821 | 663 | { |
221df1ed | 664 | unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family); |
edcd5821 DM |
665 | struct xfrm_state *x; |
666 | ||
ae3fb6d3 | 667 | hlist_for_each_entry_rcu(x, net->xfrm.state_byspi + h, byspi) { |
edcd5821 DM |
668 | if (x->props.family != family || |
669 | x->id.spi != spi || | |
1802571b | 670 | x->id.proto != proto || |
70e94e66 | 671 | !xfrm_addr_equal(&x->id.daddr, daddr, family)) |
edcd5821 DM |
672 | continue; |
673 | ||
3d6acfa7 JHS |
674 | if ((mark & x->mark.m) != x->mark.v) |
675 | continue; | |
02efdff7 FW |
676 | if (!xfrm_state_hold_rcu(x)) |
677 | continue; | |
edcd5821 DM |
678 | return x; |
679 | } | |
680 | ||
681 | return NULL; | |
682 | } | |
683 | ||
9aa60088 DM |
684 | static struct xfrm_state *__xfrm_state_lookup_byaddr(struct net *net, u32 mark, |
685 | const xfrm_address_t *daddr, | |
686 | const xfrm_address_t *saddr, | |
687 | u8 proto, unsigned short family) | |
edcd5821 | 688 | { |
221df1ed | 689 | unsigned int h = xfrm_src_hash(net, daddr, saddr, family); |
edcd5821 DM |
690 | struct xfrm_state *x; |
691 | ||
ae3fb6d3 | 692 | hlist_for_each_entry_rcu(x, net->xfrm.state_bysrc + h, bysrc) { |
edcd5821 | 693 | if (x->props.family != family || |
1802571b | 694 | x->id.proto != proto || |
70e94e66 YH |
695 | !xfrm_addr_equal(&x->id.daddr, daddr, family) || |
696 | !xfrm_addr_equal(&x->props.saddr, saddr, family)) | |
edcd5821 DM |
697 | continue; |
698 | ||
3d6acfa7 JHS |
699 | if ((mark & x->mark.m) != x->mark.v) |
700 | continue; | |
02efdff7 FW |
701 | if (!xfrm_state_hold_rcu(x)) |
702 | continue; | |
edcd5821 DM |
703 | return x; |
704 | } | |
705 | ||
706 | return NULL; | |
707 | } | |
708 | ||
709 | static inline struct xfrm_state * | |
710 | __xfrm_state_locate(struct xfrm_state *x, int use_spi, int family) | |
711 | { | |
221df1ed | 712 | struct net *net = xs_net(x); |
bd55775c | 713 | u32 mark = x->mark.v & x->mark.m; |
221df1ed | 714 | |
edcd5821 | 715 | if (use_spi) |
bd55775c JHS |
716 | return __xfrm_state_lookup(net, mark, &x->id.daddr, |
717 | x->id.spi, x->id.proto, family); | |
edcd5821 | 718 | else |
bd55775c JHS |
719 | return __xfrm_state_lookup_byaddr(net, mark, |
720 | &x->id.daddr, | |
edcd5821 DM |
721 | &x->props.saddr, |
722 | x->id.proto, family); | |
723 | } | |
724 | ||
98806f75 | 725 | static void xfrm_hash_grow_check(struct net *net, int have_hash_collision) |
2fab22f2 PM |
726 | { |
727 | if (have_hash_collision && | |
98806f75 AD |
728 | (net->xfrm.state_hmask + 1) < xfrm_state_hashmax && |
729 | net->xfrm.state_num > net->xfrm.state_hmask) | |
730 | schedule_work(&net->xfrm.state_hash_work); | |
2fab22f2 PM |
731 | } |
732 | ||
08ec9af1 | 733 | static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x, |
4a08ab0f | 734 | const struct flowi *fl, unsigned short family, |
08ec9af1 DM |
735 | struct xfrm_state **best, int *acq_in_progress, |
736 | int *error) | |
737 | { | |
738 | /* Resolution logic: | |
739 | * 1. There is a valid state with matching selector. Done. | |
740 | * 2. Valid state with inappropriate selector. Skip. | |
741 | * | |
742 | * Entering area of "sysdeps". | |
743 | * | |
744 | * 3. If state is not valid, selector is temporary, it selects | |
745 | * only session which triggered previous resolution. Key | |
746 | * manager will do something to install a state with proper | |
747 | * selector. | |
748 | */ | |
749 | if (x->km.state == XFRM_STATE_VALID) { | |
750 | if ((x->sel.family && | |
751 | !xfrm_selector_match(&x->sel, fl, x->sel.family)) || | |
752 | !security_xfrm_state_pol_flow_match(x, pol, fl)) | |
753 | return; | |
754 | ||
755 | if (!*best || | |
756 | (*best)->km.dying > x->km.dying || | |
757 | ((*best)->km.dying == x->km.dying && | |
758 | (*best)->curlft.add_time < x->curlft.add_time)) | |
759 | *best = x; | |
760 | } else if (x->km.state == XFRM_STATE_ACQ) { | |
761 | *acq_in_progress = 1; | |
762 | } else if (x->km.state == XFRM_STATE_ERROR || | |
763 | x->km.state == XFRM_STATE_EXPIRED) { | |
764 | if (xfrm_selector_match(&x->sel, fl, x->sel.family) && | |
765 | security_xfrm_state_pol_flow_match(x, pol, fl)) | |
766 | *error = -ESRCH; | |
767 | } | |
768 | } | |
769 | ||
1da177e4 | 770 | struct xfrm_state * |
33765d06 | 771 | xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
b520e9f6 | 772 | const struct flowi *fl, struct xfrm_tmpl *tmpl, |
1da177e4 LT |
773 | struct xfrm_policy *pol, int *err, |
774 | unsigned short family) | |
775 | { | |
08ec9af1 | 776 | static xfrm_address_t saddr_wildcard = { }; |
5447c5e4 | 777 | struct net *net = xp_net(pol); |
6a783c90 | 778 | unsigned int h, h_wildcard; |
37b08e34 | 779 | struct xfrm_state *x, *x0, *to_put; |
1da177e4 LT |
780 | int acquire_in_progress = 0; |
781 | int error = 0; | |
782 | struct xfrm_state *best = NULL; | |
bd55775c | 783 | u32 mark = pol->mark.v & pol->mark.m; |
8444cf71 | 784 | unsigned short encap_family = tmpl->encap_family; |
0f24558e | 785 | struct km_event c; |
a716c119 | 786 | |
37b08e34 DM |
787 | to_put = NULL; |
788 | ||
283bc9f3 | 789 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
8444cf71 | 790 | h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family); |
ae3fb6d3 | 791 | hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h, bydst) { |
8444cf71 | 792 | if (x->props.family == encap_family && |
1da177e4 | 793 | x->props.reqid == tmpl->reqid && |
3d6acfa7 | 794 | (mark & x->mark.m) == x->mark.v && |
fbd9a5b4 | 795 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
8444cf71 | 796 | xfrm_state_addr_check(x, daddr, saddr, encap_family) && |
1da177e4 LT |
797 | tmpl->mode == x->props.mode && |
798 | tmpl->id.proto == x->id.proto && | |
08ec9af1 | 799 | (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) |
1f673c5f | 800 | xfrm_state_look_at(pol, x, fl, encap_family, |
08ec9af1 DM |
801 | &best, &acquire_in_progress, &error); |
802 | } | |
6f115638 | 803 | if (best || acquire_in_progress) |
08ec9af1 DM |
804 | goto found; |
805 | ||
8444cf71 | 806 | h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, encap_family); |
ae3fb6d3 | 807 | hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h_wildcard, bydst) { |
8444cf71 | 808 | if (x->props.family == encap_family && |
08ec9af1 | 809 | x->props.reqid == tmpl->reqid && |
3d6acfa7 | 810 | (mark & x->mark.m) == x->mark.v && |
08ec9af1 | 811 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
f59bbdfa | 812 | xfrm_addr_equal(&x->id.daddr, daddr, encap_family) && |
08ec9af1 DM |
813 | tmpl->mode == x->props.mode && |
814 | tmpl->id.proto == x->id.proto && | |
815 | (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) | |
1f673c5f | 816 | xfrm_state_look_at(pol, x, fl, encap_family, |
08ec9af1 | 817 | &best, &acquire_in_progress, &error); |
1da177e4 LT |
818 | } |
819 | ||
08ec9af1 | 820 | found: |
1da177e4 LT |
821 | x = best; |
822 | if (!x && !error && !acquire_in_progress) { | |
5c5d281a | 823 | if (tmpl->id.spi && |
bd55775c | 824 | (x0 = __xfrm_state_lookup(net, mark, daddr, tmpl->id.spi, |
8444cf71 | 825 | tmpl->id.proto, encap_family)) != NULL) { |
37b08e34 | 826 | to_put = x0; |
1da177e4 LT |
827 | error = -EEXIST; |
828 | goto out; | |
829 | } | |
0f24558e HG |
830 | |
831 | c.net = net; | |
832 | /* If the KMs have no listeners (yet...), avoid allocating an SA | |
833 | * for each and every packet - garbage collection might not | |
834 | * handle the flood. | |
835 | */ | |
836 | if (!km_is_alive(&c)) { | |
837 | error = -ESRCH; | |
838 | goto out; | |
839 | } | |
840 | ||
5447c5e4 | 841 | x = xfrm_state_alloc(net); |
1da177e4 LT |
842 | if (x == NULL) { |
843 | error = -ENOMEM; | |
844 | goto out; | |
845 | } | |
8444cf71 | 846 | /* Initialize temporary state matching only |
1da177e4 | 847 | * to current session. */ |
8444cf71 | 848 | xfrm_init_tempstate(x, fl, tmpl, daddr, saddr, family); |
bd55775c | 849 | memcpy(&x->mark, &pol->mark, sizeof(x->mark)); |
1da177e4 | 850 | |
1d28f42c | 851 | error = security_xfrm_state_alloc_acquire(x, pol->security, fl->flowi_secid); |
e0d1caa7 VY |
852 | if (error) { |
853 | x->km.state = XFRM_STATE_DEAD; | |
37b08e34 | 854 | to_put = x; |
e0d1caa7 VY |
855 | x = NULL; |
856 | goto out; | |
857 | } | |
858 | ||
1da177e4 LT |
859 | if (km_query(x, tmpl, pol) == 0) { |
860 | x->km.state = XFRM_STATE_ACQ; | |
5447c5e4 | 861 | list_add(&x->km.all, &net->xfrm.state_all); |
ae3fb6d3 | 862 | hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h); |
8444cf71 | 863 | h = xfrm_src_hash(net, daddr, saddr, encap_family); |
ae3fb6d3 | 864 | hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h); |
1da177e4 | 865 | if (x->id.spi) { |
8444cf71 | 866 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, encap_family); |
ae3fb6d3 | 867 | hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h); |
1da177e4 | 868 | } |
b27aeadb | 869 | x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires; |
9e0d57fd | 870 | tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL); |
5447c5e4 AD |
871 | net->xfrm.state_num++; |
872 | xfrm_hash_grow_check(net, x->bydst.next != NULL); | |
1da177e4 LT |
873 | } else { |
874 | x->km.state = XFRM_STATE_DEAD; | |
37b08e34 | 875 | to_put = x; |
1da177e4 LT |
876 | x = NULL; |
877 | error = -ESRCH; | |
878 | } | |
879 | } | |
880 | out: | |
02efdff7 FW |
881 | if (x) { |
882 | if (!xfrm_state_hold_rcu(x)) { | |
883 | *err = -EAGAIN; | |
884 | x = NULL; | |
885 | } | |
886 | } else { | |
1da177e4 | 887 | *err = acquire_in_progress ? -EAGAIN : error; |
02efdff7 | 888 | } |
283bc9f3 | 889 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
37b08e34 DM |
890 | if (to_put) |
891 | xfrm_state_put(to_put); | |
1da177e4 LT |
892 | return x; |
893 | } | |
894 | ||
628529b6 | 895 | struct xfrm_state * |
bd55775c | 896 | xfrm_stateonly_find(struct net *net, u32 mark, |
5447c5e4 | 897 | xfrm_address_t *daddr, xfrm_address_t *saddr, |
628529b6 JHS |
898 | unsigned short family, u8 mode, u8 proto, u32 reqid) |
899 | { | |
4bda4f25 | 900 | unsigned int h; |
628529b6 | 901 | struct xfrm_state *rx = NULL, *x = NULL; |
628529b6 | 902 | |
4ae770bf | 903 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
5447c5e4 | 904 | h = xfrm_dst_hash(net, daddr, saddr, reqid, family); |
b67bfe0d | 905 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
628529b6 JHS |
906 | if (x->props.family == family && |
907 | x->props.reqid == reqid && | |
3d6acfa7 | 908 | (mark & x->mark.m) == x->mark.v && |
628529b6 JHS |
909 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
910 | xfrm_state_addr_check(x, daddr, saddr, family) && | |
911 | mode == x->props.mode && | |
912 | proto == x->id.proto && | |
913 | x->km.state == XFRM_STATE_VALID) { | |
914 | rx = x; | |
915 | break; | |
916 | } | |
917 | } | |
918 | ||
919 | if (rx) | |
920 | xfrm_state_hold(rx); | |
4ae770bf | 921 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
628529b6 JHS |
922 | |
923 | ||
924 | return rx; | |
925 | } | |
926 | EXPORT_SYMBOL(xfrm_stateonly_find); | |
927 | ||
c454997e FD |
928 | struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi, |
929 | unsigned short family) | |
930 | { | |
931 | struct xfrm_state *x; | |
932 | struct xfrm_state_walk *w; | |
933 | ||
934 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
935 | list_for_each_entry(w, &net->xfrm.state_all, all) { | |
936 | x = container_of(w, struct xfrm_state, km); | |
937 | if (x->props.family != family || | |
938 | x->id.spi != spi) | |
939 | continue; | |
940 | ||
c454997e | 941 | xfrm_state_hold(x); |
bdddbf69 | 942 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
c454997e FD |
943 | return x; |
944 | } | |
945 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); | |
946 | return NULL; | |
947 | } | |
948 | EXPORT_SYMBOL(xfrm_state_lookup_byspi); | |
949 | ||
1da177e4 LT |
950 | static void __xfrm_state_insert(struct xfrm_state *x) |
951 | { | |
98806f75 | 952 | struct net *net = xs_net(x); |
a624c108 | 953 | unsigned int h; |
1da177e4 | 954 | |
98806f75 | 955 | list_add(&x->km.all, &net->xfrm.state_all); |
4c563f76 | 956 | |
98806f75 | 957 | h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr, |
c1969f29 | 958 | x->props.reqid, x->props.family); |
ae3fb6d3 | 959 | hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h); |
1da177e4 | 960 | |
98806f75 | 961 | h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family); |
ae3fb6d3 | 962 | hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h); |
1da177e4 | 963 | |
7b4dc360 | 964 | if (x->id.spi) { |
98806f75 | 965 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, |
6c44e6b7 MN |
966 | x->props.family); |
967 | ||
ae3fb6d3 | 968 | hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h); |
6c44e6b7 MN |
969 | } |
970 | ||
9e0d57fd | 971 | tasklet_hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL); |
a47f0ce0 DM |
972 | if (x->replay_maxage) |
973 | mod_timer(&x->rtimer, jiffies + x->replay_maxage); | |
f8cd5488 | 974 | |
98806f75 | 975 | net->xfrm.state_num++; |
f034b5d4 | 976 | |
98806f75 | 977 | xfrm_hash_grow_check(net, x->bydst.next != NULL); |
1da177e4 LT |
978 | } |
979 | ||
283bc9f3 | 980 | /* net->xfrm.xfrm_state_lock is held */ |
c7f5ea3a DM |
981 | static void __xfrm_state_bump_genids(struct xfrm_state *xnew) |
982 | { | |
98806f75 | 983 | struct net *net = xs_net(xnew); |
c7f5ea3a DM |
984 | unsigned short family = xnew->props.family; |
985 | u32 reqid = xnew->props.reqid; | |
986 | struct xfrm_state *x; | |
c7f5ea3a | 987 | unsigned int h; |
3d6acfa7 | 988 | u32 mark = xnew->mark.v & xnew->mark.m; |
c7f5ea3a | 989 | |
98806f75 | 990 | h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family); |
b67bfe0d | 991 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
c7f5ea3a DM |
992 | if (x->props.family == family && |
993 | x->props.reqid == reqid && | |
3d6acfa7 | 994 | (mark & x->mark.m) == x->mark.v && |
70e94e66 YH |
995 | xfrm_addr_equal(&x->id.daddr, &xnew->id.daddr, family) && |
996 | xfrm_addr_equal(&x->props.saddr, &xnew->props.saddr, family)) | |
34996cb9 | 997 | x->genid++; |
c7f5ea3a DM |
998 | } |
999 | } | |
1000 | ||
1da177e4 LT |
1001 | void xfrm_state_insert(struct xfrm_state *x) |
1002 | { | |
283bc9f3 FD |
1003 | struct net *net = xs_net(x); |
1004 | ||
1005 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
c7f5ea3a | 1006 | __xfrm_state_bump_genids(x); |
1da177e4 | 1007 | __xfrm_state_insert(x); |
283bc9f3 | 1008 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1009 | } |
1010 | EXPORT_SYMBOL(xfrm_state_insert); | |
1011 | ||
283bc9f3 | 1012 | /* net->xfrm.xfrm_state_lock is held */ |
e473fcb4 MK |
1013 | static struct xfrm_state *__find_acq_core(struct net *net, |
1014 | const struct xfrm_mark *m, | |
a70486f0 DM |
1015 | unsigned short family, u8 mode, |
1016 | u32 reqid, u8 proto, | |
1017 | const xfrm_address_t *daddr, | |
e473fcb4 MK |
1018 | const xfrm_address_t *saddr, |
1019 | int create) | |
2770834c | 1020 | { |
5447c5e4 | 1021 | unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family); |
2770834c | 1022 | struct xfrm_state *x; |
3d6acfa7 | 1023 | u32 mark = m->v & m->m; |
2770834c | 1024 | |
b67bfe0d | 1025 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
2770834c DM |
1026 | if (x->props.reqid != reqid || |
1027 | x->props.mode != mode || | |
1028 | x->props.family != family || | |
1029 | x->km.state != XFRM_STATE_ACQ || | |
75e252d9 | 1030 | x->id.spi != 0 || |
1802571b | 1031 | x->id.proto != proto || |
3d6acfa7 | 1032 | (mark & x->mark.m) != x->mark.v || |
70e94e66 YH |
1033 | !xfrm_addr_equal(&x->id.daddr, daddr, family) || |
1034 | !xfrm_addr_equal(&x->props.saddr, saddr, family)) | |
2770834c DM |
1035 | continue; |
1036 | ||
2770834c DM |
1037 | xfrm_state_hold(x); |
1038 | return x; | |
1039 | } | |
1040 | ||
1041 | if (!create) | |
1042 | return NULL; | |
1043 | ||
5447c5e4 | 1044 | x = xfrm_state_alloc(net); |
2770834c DM |
1045 | if (likely(x)) { |
1046 | switch (family) { | |
1047 | case AF_INET: | |
1048 | x->sel.daddr.a4 = daddr->a4; | |
1049 | x->sel.saddr.a4 = saddr->a4; | |
1050 | x->sel.prefixlen_d = 32; | |
1051 | x->sel.prefixlen_s = 32; | |
1052 | x->props.saddr.a4 = saddr->a4; | |
1053 | x->id.daddr.a4 = daddr->a4; | |
1054 | break; | |
1055 | ||
1056 | case AF_INET6: | |
15e318bd JB |
1057 | x->sel.daddr.in6 = daddr->in6; |
1058 | x->sel.saddr.in6 = saddr->in6; | |
2770834c DM |
1059 | x->sel.prefixlen_d = 128; |
1060 | x->sel.prefixlen_s = 128; | |
15e318bd JB |
1061 | x->props.saddr.in6 = saddr->in6; |
1062 | x->id.daddr.in6 = daddr->in6; | |
2770834c | 1063 | break; |
3ff50b79 | 1064 | } |
2770834c DM |
1065 | |
1066 | x->km.state = XFRM_STATE_ACQ; | |
1067 | x->id.proto = proto; | |
1068 | x->props.family = family; | |
1069 | x->props.mode = mode; | |
1070 | x->props.reqid = reqid; | |
bd55775c JHS |
1071 | x->mark.v = m->v; |
1072 | x->mark.m = m->m; | |
b27aeadb | 1073 | x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires; |
2770834c | 1074 | xfrm_state_hold(x); |
9e0d57fd | 1075 | tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL); |
5447c5e4 | 1076 | list_add(&x->km.all, &net->xfrm.state_all); |
ae3fb6d3 | 1077 | hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h); |
5447c5e4 | 1078 | h = xfrm_src_hash(net, daddr, saddr, family); |
ae3fb6d3 | 1079 | hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h); |
918049f0 | 1080 | |
5447c5e4 | 1081 | net->xfrm.state_num++; |
918049f0 | 1082 | |
5447c5e4 | 1083 | xfrm_hash_grow_check(net, x->bydst.next != NULL); |
2770834c DM |
1084 | } |
1085 | ||
1086 | return x; | |
1087 | } | |
1088 | ||
bd55775c | 1089 | static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); |
1da177e4 LT |
1090 | |
1091 | int xfrm_state_add(struct xfrm_state *x) | |
1092 | { | |
5447c5e4 | 1093 | struct net *net = xs_net(x); |
37b08e34 | 1094 | struct xfrm_state *x1, *to_put; |
1da177e4 LT |
1095 | int family; |
1096 | int err; | |
bd55775c | 1097 | u32 mark = x->mark.v & x->mark.m; |
eb2971b6 | 1098 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
1da177e4 LT |
1099 | |
1100 | family = x->props.family; | |
1da177e4 | 1101 | |
37b08e34 DM |
1102 | to_put = NULL; |
1103 | ||
283bc9f3 | 1104 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 1105 | |
edcd5821 | 1106 | x1 = __xfrm_state_locate(x, use_spi, family); |
1da177e4 | 1107 | if (x1) { |
37b08e34 | 1108 | to_put = x1; |
1da177e4 LT |
1109 | x1 = NULL; |
1110 | err = -EEXIST; | |
1111 | goto out; | |
1112 | } | |
1113 | ||
eb2971b6 | 1114 | if (use_spi && x->km.seq) { |
bd55775c | 1115 | x1 = __xfrm_find_acq_byseq(net, mark, x->km.seq); |
75e252d9 | 1116 | if (x1 && ((x1->id.proto != x->id.proto) || |
70e94e66 | 1117 | !xfrm_addr_equal(&x1->id.daddr, &x->id.daddr, family))) { |
37b08e34 | 1118 | to_put = x1; |
1da177e4 LT |
1119 | x1 = NULL; |
1120 | } | |
1121 | } | |
1122 | ||
eb2971b6 | 1123 | if (use_spi && !x1) |
bd55775c JHS |
1124 | x1 = __find_acq_core(net, &x->mark, family, x->props.mode, |
1125 | x->props.reqid, x->id.proto, | |
2770834c | 1126 | &x->id.daddr, &x->props.saddr, 0); |
1da177e4 | 1127 | |
c7f5ea3a | 1128 | __xfrm_state_bump_genids(x); |
1da177e4 LT |
1129 | __xfrm_state_insert(x); |
1130 | err = 0; | |
1131 | ||
1132 | out: | |
283bc9f3 | 1133 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1134 | |
1135 | if (x1) { | |
1136 | xfrm_state_delete(x1); | |
1137 | xfrm_state_put(x1); | |
1138 | } | |
1139 | ||
37b08e34 DM |
1140 | if (to_put) |
1141 | xfrm_state_put(to_put); | |
1142 | ||
1da177e4 LT |
1143 | return err; |
1144 | } | |
1145 | EXPORT_SYMBOL(xfrm_state_add); | |
1146 | ||
80c9abaa | 1147 | #ifdef CONFIG_XFRM_MIGRATE |
cc9ab60e | 1148 | static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig) |
80c9abaa | 1149 | { |
98806f75 | 1150 | struct net *net = xs_net(orig); |
98806f75 | 1151 | struct xfrm_state *x = xfrm_state_alloc(net); |
80c9abaa | 1152 | if (!x) |
553f9118 | 1153 | goto out; |
80c9abaa SS |
1154 | |
1155 | memcpy(&x->id, &orig->id, sizeof(x->id)); | |
1156 | memcpy(&x->sel, &orig->sel, sizeof(x->sel)); | |
1157 | memcpy(&x->lft, &orig->lft, sizeof(x->lft)); | |
1158 | x->props.mode = orig->props.mode; | |
1159 | x->props.replay_window = orig->props.replay_window; | |
1160 | x->props.reqid = orig->props.reqid; | |
1161 | x->props.family = orig->props.family; | |
1162 | x->props.saddr = orig->props.saddr; | |
1163 | ||
1164 | if (orig->aalg) { | |
4447bb33 | 1165 | x->aalg = xfrm_algo_auth_clone(orig->aalg); |
80c9abaa SS |
1166 | if (!x->aalg) |
1167 | goto error; | |
1168 | } | |
1169 | x->props.aalgo = orig->props.aalgo; | |
1170 | ||
ee5c2317 SK |
1171 | if (orig->aead) { |
1172 | x->aead = xfrm_algo_aead_clone(orig->aead); | |
1173 | if (!x->aead) | |
1174 | goto error; | |
1175 | } | |
80c9abaa SS |
1176 | if (orig->ealg) { |
1177 | x->ealg = xfrm_algo_clone(orig->ealg); | |
1178 | if (!x->ealg) | |
1179 | goto error; | |
1180 | } | |
1181 | x->props.ealgo = orig->props.ealgo; | |
1182 | ||
1183 | if (orig->calg) { | |
1184 | x->calg = xfrm_algo_clone(orig->calg); | |
1185 | if (!x->calg) | |
1186 | goto error; | |
1187 | } | |
1188 | x->props.calgo = orig->props.calgo; | |
1189 | ||
a716c119 | 1190 | if (orig->encap) { |
80c9abaa SS |
1191 | x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL); |
1192 | if (!x->encap) | |
1193 | goto error; | |
1194 | } | |
1195 | ||
1196 | if (orig->coaddr) { | |
1197 | x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr), | |
1198 | GFP_KERNEL); | |
1199 | if (!x->coaddr) | |
1200 | goto error; | |
1201 | } | |
1202 | ||
af2f464e | 1203 | if (orig->replay_esn) { |
cc9ab60e | 1204 | if (xfrm_replay_clone(x, orig)) |
af2f464e SK |
1205 | goto error; |
1206 | } | |
1207 | ||
bd55775c JHS |
1208 | memcpy(&x->mark, &orig->mark, sizeof(x->mark)); |
1209 | ||
cc9ab60e | 1210 | if (xfrm_init_state(x) < 0) |
80c9abaa SS |
1211 | goto error; |
1212 | ||
1213 | x->props.flags = orig->props.flags; | |
a947b0a9 | 1214 | x->props.extra_flags = orig->props.extra_flags; |
80c9abaa | 1215 | |
ee5c2317 SK |
1216 | x->tfcpad = orig->tfcpad; |
1217 | x->replay_maxdiff = orig->replay_maxdiff; | |
1218 | x->replay_maxage = orig->replay_maxage; | |
80c9abaa SS |
1219 | x->curlft.add_time = orig->curlft.add_time; |
1220 | x->km.state = orig->km.state; | |
1221 | x->km.seq = orig->km.seq; | |
1222 | ||
1223 | return x; | |
1224 | ||
1225 | error: | |
553f9118 HX |
1226 | xfrm_state_put(x); |
1227 | out: | |
80c9abaa SS |
1228 | return NULL; |
1229 | } | |
80c9abaa | 1230 | |
283bc9f3 | 1231 | struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net) |
80c9abaa SS |
1232 | { |
1233 | unsigned int h; | |
8c0cba22 SK |
1234 | struct xfrm_state *x = NULL; |
1235 | ||
1236 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
80c9abaa SS |
1237 | |
1238 | if (m->reqid) { | |
283bc9f3 | 1239 | h = xfrm_dst_hash(net, &m->old_daddr, &m->old_saddr, |
80c9abaa | 1240 | m->reqid, m->old_family); |
283bc9f3 | 1241 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
80c9abaa SS |
1242 | if (x->props.mode != m->mode || |
1243 | x->id.proto != m->proto) | |
1244 | continue; | |
1245 | if (m->reqid && x->props.reqid != m->reqid) | |
1246 | continue; | |
70e94e66 YH |
1247 | if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr, |
1248 | m->old_family) || | |
1249 | !xfrm_addr_equal(&x->props.saddr, &m->old_saddr, | |
1250 | m->old_family)) | |
80c9abaa SS |
1251 | continue; |
1252 | xfrm_state_hold(x); | |
8c0cba22 | 1253 | break; |
80c9abaa SS |
1254 | } |
1255 | } else { | |
283bc9f3 | 1256 | h = xfrm_src_hash(net, &m->old_daddr, &m->old_saddr, |
80c9abaa | 1257 | m->old_family); |
283bc9f3 | 1258 | hlist_for_each_entry(x, net->xfrm.state_bysrc+h, bysrc) { |
80c9abaa SS |
1259 | if (x->props.mode != m->mode || |
1260 | x->id.proto != m->proto) | |
1261 | continue; | |
70e94e66 YH |
1262 | if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr, |
1263 | m->old_family) || | |
1264 | !xfrm_addr_equal(&x->props.saddr, &m->old_saddr, | |
1265 | m->old_family)) | |
80c9abaa SS |
1266 | continue; |
1267 | xfrm_state_hold(x); | |
8c0cba22 | 1268 | break; |
80c9abaa SS |
1269 | } |
1270 | } | |
1271 | ||
8c0cba22 SK |
1272 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1273 | ||
1274 | return x; | |
80c9abaa SS |
1275 | } |
1276 | EXPORT_SYMBOL(xfrm_migrate_state_find); | |
1277 | ||
3e94c2dc WC |
1278 | struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, |
1279 | struct xfrm_migrate *m) | |
80c9abaa SS |
1280 | { |
1281 | struct xfrm_state *xc; | |
80c9abaa | 1282 | |
cc9ab60e | 1283 | xc = xfrm_state_clone(x); |
80c9abaa SS |
1284 | if (!xc) |
1285 | return NULL; | |
1286 | ||
1287 | memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr)); | |
1288 | memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr)); | |
1289 | ||
1290 | /* add state */ | |
70e94e66 | 1291 | if (xfrm_addr_equal(&x->id.daddr, &m->new_daddr, m->new_family)) { |
80c9abaa SS |
1292 | /* a care is needed when the destination address of the |
1293 | state is to be updated as it is a part of triplet */ | |
1294 | xfrm_state_insert(xc); | |
1295 | } else { | |
cc9ab60e | 1296 | if (xfrm_state_add(xc) < 0) |
80c9abaa SS |
1297 | goto error; |
1298 | } | |
1299 | ||
1300 | return xc; | |
1301 | error: | |
78347c8c | 1302 | xfrm_state_put(xc); |
80c9abaa SS |
1303 | return NULL; |
1304 | } | |
1305 | EXPORT_SYMBOL(xfrm_state_migrate); | |
1306 | #endif | |
1307 | ||
1da177e4 LT |
1308 | int xfrm_state_update(struct xfrm_state *x) |
1309 | { | |
37b08e34 | 1310 | struct xfrm_state *x1, *to_put; |
1da177e4 | 1311 | int err; |
eb2971b6 | 1312 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
283bc9f3 | 1313 | struct net *net = xs_net(x); |
1da177e4 | 1314 | |
37b08e34 DM |
1315 | to_put = NULL; |
1316 | ||
283bc9f3 | 1317 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
edcd5821 | 1318 | x1 = __xfrm_state_locate(x, use_spi, x->props.family); |
1da177e4 LT |
1319 | |
1320 | err = -ESRCH; | |
1321 | if (!x1) | |
1322 | goto out; | |
1323 | ||
1324 | if (xfrm_state_kern(x1)) { | |
37b08e34 | 1325 | to_put = x1; |
1da177e4 LT |
1326 | err = -EEXIST; |
1327 | goto out; | |
1328 | } | |
1329 | ||
1330 | if (x1->km.state == XFRM_STATE_ACQ) { | |
1331 | __xfrm_state_insert(x); | |
1332 | x = NULL; | |
1333 | } | |
1334 | err = 0; | |
1335 | ||
1336 | out: | |
283bc9f3 | 1337 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 1338 | |
37b08e34 DM |
1339 | if (to_put) |
1340 | xfrm_state_put(to_put); | |
1341 | ||
1da177e4 LT |
1342 | if (err) |
1343 | return err; | |
1344 | ||
1345 | if (!x) { | |
1346 | xfrm_state_delete(x1); | |
1347 | xfrm_state_put(x1); | |
1348 | return 0; | |
1349 | } | |
1350 | ||
1351 | err = -EINVAL; | |
1352 | spin_lock_bh(&x1->lock); | |
1353 | if (likely(x1->km.state == XFRM_STATE_VALID)) { | |
1354 | if (x->encap && x1->encap) | |
1355 | memcpy(x1->encap, x->encap, sizeof(*x1->encap)); | |
060f02a3 NT |
1356 | if (x->coaddr && x1->coaddr) { |
1357 | memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr)); | |
1358 | } | |
1359 | if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel))) | |
1360 | memcpy(&x1->sel, &x->sel, sizeof(x1->sel)); | |
1da177e4 LT |
1361 | memcpy(&x1->lft, &x->lft, sizeof(x1->lft)); |
1362 | x1->km.dying = 0; | |
1363 | ||
9e0d57fd | 1364 | tasklet_hrtimer_start(&x1->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL); |
1da177e4 LT |
1365 | if (x1->curlft.use_time) |
1366 | xfrm_state_check_expire(x1); | |
1367 | ||
1368 | err = 0; | |
8fcbc637 TG |
1369 | x->km.state = XFRM_STATE_DEAD; |
1370 | __xfrm_state_put(x); | |
1da177e4 LT |
1371 | } |
1372 | spin_unlock_bh(&x1->lock); | |
1373 | ||
1374 | xfrm_state_put(x1); | |
1375 | ||
1376 | return err; | |
1377 | } | |
1378 | EXPORT_SYMBOL(xfrm_state_update); | |
1379 | ||
1380 | int xfrm_state_check_expire(struct xfrm_state *x) | |
1381 | { | |
1382 | if (!x->curlft.use_time) | |
9d729f72 | 1383 | x->curlft.use_time = get_seconds(); |
1da177e4 | 1384 | |
1da177e4 LT |
1385 | if (x->curlft.bytes >= x->lft.hard_byte_limit || |
1386 | x->curlft.packets >= x->lft.hard_packet_limit) { | |
4666faab | 1387 | x->km.state = XFRM_STATE_EXPIRED; |
9b7a787d | 1388 | tasklet_hrtimer_start(&x->mtimer, ktime_set(0, 0), HRTIMER_MODE_REL); |
1da177e4 LT |
1389 | return -EINVAL; |
1390 | } | |
1391 | ||
1392 | if (!x->km.dying && | |
1393 | (x->curlft.bytes >= x->lft.soft_byte_limit || | |
4666faab HX |
1394 | x->curlft.packets >= x->lft.soft_packet_limit)) { |
1395 | x->km.dying = 1; | |
53bc6b4d | 1396 | km_state_expired(x, 0, 0); |
4666faab | 1397 | } |
1da177e4 LT |
1398 | return 0; |
1399 | } | |
1400 | EXPORT_SYMBOL(xfrm_state_check_expire); | |
1401 | ||
1da177e4 | 1402 | struct xfrm_state * |
a70486f0 | 1403 | xfrm_state_lookup(struct net *net, u32 mark, const xfrm_address_t *daddr, __be32 spi, |
bd55775c | 1404 | u8 proto, unsigned short family) |
1da177e4 LT |
1405 | { |
1406 | struct xfrm_state *x; | |
1da177e4 | 1407 | |
283bc9f3 | 1408 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1409 | x = __xfrm_state_lookup(net, mark, daddr, spi, proto, family); |
283bc9f3 | 1410 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1411 | return x; |
1412 | } | |
1413 | EXPORT_SYMBOL(xfrm_state_lookup); | |
1414 | ||
1415 | struct xfrm_state * | |
bd55775c | 1416 | xfrm_state_lookup_byaddr(struct net *net, u32 mark, |
a70486f0 | 1417 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
eb2971b6 MN |
1418 | u8 proto, unsigned short family) |
1419 | { | |
1420 | struct xfrm_state *x; | |
eb2971b6 | 1421 | |
283bc9f3 | 1422 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1423 | x = __xfrm_state_lookup_byaddr(net, mark, daddr, saddr, proto, family); |
283bc9f3 | 1424 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
eb2971b6 MN |
1425 | return x; |
1426 | } | |
1427 | EXPORT_SYMBOL(xfrm_state_lookup_byaddr); | |
1428 | ||
1429 | struct xfrm_state * | |
e473fcb4 MK |
1430 | xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, u8 mode, u32 reqid, |
1431 | u8 proto, const xfrm_address_t *daddr, | |
1432 | const xfrm_address_t *saddr, int create, unsigned short family) | |
1da177e4 LT |
1433 | { |
1434 | struct xfrm_state *x; | |
1da177e4 | 1435 | |
283bc9f3 | 1436 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1437 | x = __find_acq_core(net, mark, family, mode, reqid, proto, daddr, saddr, create); |
283bc9f3 | 1438 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
2770834c | 1439 | |
1da177e4 LT |
1440 | return x; |
1441 | } | |
1442 | EXPORT_SYMBOL(xfrm_find_acq); | |
1443 | ||
41a49cc3 MN |
1444 | #ifdef CONFIG_XFRM_SUB_POLICY |
1445 | int | |
1446 | xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, | |
283bc9f3 | 1447 | unsigned short family, struct net *net) |
41a49cc3 MN |
1448 | { |
1449 | int err = 0; | |
1450 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
1451 | if (!afinfo) | |
1452 | return -EAFNOSUPPORT; | |
1453 | ||
283bc9f3 | 1454 | spin_lock_bh(&net->xfrm.xfrm_state_lock); /*FIXME*/ |
41a49cc3 MN |
1455 | if (afinfo->tmpl_sort) |
1456 | err = afinfo->tmpl_sort(dst, src, n); | |
283bc9f3 | 1457 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
41a49cc3 MN |
1458 | xfrm_state_put_afinfo(afinfo); |
1459 | return err; | |
1460 | } | |
1461 | EXPORT_SYMBOL(xfrm_tmpl_sort); | |
1462 | ||
1463 | int | |
1464 | xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, | |
1465 | unsigned short family) | |
1466 | { | |
1467 | int err = 0; | |
1468 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
35ea790d | 1469 | struct net *net = xs_net(*src); |
283bc9f3 | 1470 | |
41a49cc3 MN |
1471 | if (!afinfo) |
1472 | return -EAFNOSUPPORT; | |
1473 | ||
283bc9f3 | 1474 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
41a49cc3 MN |
1475 | if (afinfo->state_sort) |
1476 | err = afinfo->state_sort(dst, src, n); | |
283bc9f3 | 1477 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
41a49cc3 MN |
1478 | xfrm_state_put_afinfo(afinfo); |
1479 | return err; | |
1480 | } | |
1481 | EXPORT_SYMBOL(xfrm_state_sort); | |
1482 | #endif | |
1483 | ||
1da177e4 LT |
1484 | /* Silly enough, but I'm lazy to build resolution list */ |
1485 | ||
bd55775c | 1486 | static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq) |
1da177e4 LT |
1487 | { |
1488 | int i; | |
1da177e4 | 1489 | |
5447c5e4 | 1490 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
8f126e37 DM |
1491 | struct xfrm_state *x; |
1492 | ||
b67bfe0d | 1493 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
8f126e37 | 1494 | if (x->km.seq == seq && |
3d6acfa7 | 1495 | (mark & x->mark.m) == x->mark.v && |
8f126e37 | 1496 | x->km.state == XFRM_STATE_ACQ) { |
1da177e4 LT |
1497 | xfrm_state_hold(x); |
1498 | return x; | |
1499 | } | |
1500 | } | |
1501 | } | |
1502 | return NULL; | |
1503 | } | |
1504 | ||
bd55775c | 1505 | struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq) |
1da177e4 LT |
1506 | { |
1507 | struct xfrm_state *x; | |
1508 | ||
283bc9f3 | 1509 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1510 | x = __xfrm_find_acq_byseq(net, mark, seq); |
283bc9f3 | 1511 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1512 | return x; |
1513 | } | |
1514 | EXPORT_SYMBOL(xfrm_find_acq_byseq); | |
1515 | ||
1516 | u32 xfrm_get_acqseq(void) | |
1517 | { | |
1518 | u32 res; | |
6836b9bd | 1519 | static atomic_t acqseq; |
1520 | ||
1521 | do { | |
1522 | res = atomic_inc_return(&acqseq); | |
1523 | } while (!res); | |
1da177e4 | 1524 | |
1da177e4 LT |
1525 | return res; |
1526 | } | |
1527 | EXPORT_SYMBOL(xfrm_get_acqseq); | |
1528 | ||
776e9dd9 FD |
1529 | int verify_spi_info(u8 proto, u32 min, u32 max) |
1530 | { | |
1531 | switch (proto) { | |
1532 | case IPPROTO_AH: | |
1533 | case IPPROTO_ESP: | |
1534 | break; | |
1535 | ||
1536 | case IPPROTO_COMP: | |
1537 | /* IPCOMP spi is 16-bits. */ | |
1538 | if (max >= 0x10000) | |
1539 | return -EINVAL; | |
1540 | break; | |
1541 | ||
1542 | default: | |
1543 | return -EINVAL; | |
1544 | } | |
1545 | ||
1546 | if (min > max) | |
1547 | return -EINVAL; | |
1548 | ||
1549 | return 0; | |
1550 | } | |
1551 | EXPORT_SYMBOL(verify_spi_info); | |
1552 | ||
658b219e | 1553 | int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high) |
1da177e4 | 1554 | { |
221df1ed | 1555 | struct net *net = xs_net(x); |
f034b5d4 | 1556 | unsigned int h; |
1da177e4 | 1557 | struct xfrm_state *x0; |
658b219e HX |
1558 | int err = -ENOENT; |
1559 | __be32 minspi = htonl(low); | |
1560 | __be32 maxspi = htonl(high); | |
bd55775c | 1561 | u32 mark = x->mark.v & x->mark.m; |
1da177e4 | 1562 | |
658b219e HX |
1563 | spin_lock_bh(&x->lock); |
1564 | if (x->km.state == XFRM_STATE_DEAD) | |
1565 | goto unlock; | |
1566 | ||
1567 | err = 0; | |
1da177e4 | 1568 | if (x->id.spi) |
658b219e HX |
1569 | goto unlock; |
1570 | ||
1571 | err = -ENOENT; | |
1da177e4 LT |
1572 | |
1573 | if (minspi == maxspi) { | |
bd55775c | 1574 | x0 = xfrm_state_lookup(net, mark, &x->id.daddr, minspi, x->id.proto, x->props.family); |
1da177e4 LT |
1575 | if (x0) { |
1576 | xfrm_state_put(x0); | |
658b219e | 1577 | goto unlock; |
1da177e4 LT |
1578 | } |
1579 | x->id.spi = minspi; | |
1580 | } else { | |
1581 | u32 spi = 0; | |
9b7a787d | 1582 | for (h = 0; h < high-low+1; h++) { |
63862b5b | 1583 | spi = low + prandom_u32()%(high-low+1); |
bd55775c | 1584 | x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family); |
1da177e4 LT |
1585 | if (x0 == NULL) { |
1586 | x->id.spi = htonl(spi); | |
1587 | break; | |
1588 | } | |
1589 | xfrm_state_put(x0); | |
1590 | } | |
1591 | } | |
1592 | if (x->id.spi) { | |
283bc9f3 | 1593 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12604d8a | 1594 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family); |
ae3fb6d3 | 1595 | hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h); |
283bc9f3 | 1596 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
658b219e HX |
1597 | |
1598 | err = 0; | |
1da177e4 | 1599 | } |
658b219e HX |
1600 | |
1601 | unlock: | |
1602 | spin_unlock_bh(&x->lock); | |
1603 | ||
1604 | return err; | |
1da177e4 LT |
1605 | } |
1606 | EXPORT_SYMBOL(xfrm_alloc_spi); | |
1607 | ||
d3623099 | 1608 | static bool __xfrm_state_filter_match(struct xfrm_state *x, |
870a2df4 | 1609 | struct xfrm_address_filter *filter) |
d3623099 ND |
1610 | { |
1611 | if (filter) { | |
1612 | if ((filter->family == AF_INET || | |
1613 | filter->family == AF_INET6) && | |
1614 | x->props.family != filter->family) | |
1615 | return false; | |
1616 | ||
1617 | return addr_match(&x->props.saddr, &filter->saddr, | |
1618 | filter->splen) && | |
1619 | addr_match(&x->id.daddr, &filter->daddr, | |
1620 | filter->dplen); | |
1621 | } | |
1622 | return true; | |
1623 | } | |
1624 | ||
284fa7da | 1625 | int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, |
4c563f76 | 1626 | int (*func)(struct xfrm_state *, int, void*), |
1da177e4 LT |
1627 | void *data) |
1628 | { | |
12a169e7 HX |
1629 | struct xfrm_state *state; |
1630 | struct xfrm_state_walk *x; | |
1da177e4 LT |
1631 | int err = 0; |
1632 | ||
12a169e7 | 1633 | if (walk->seq != 0 && list_empty(&walk->all)) |
4c563f76 TT |
1634 | return 0; |
1635 | ||
283bc9f3 | 1636 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12a169e7 | 1637 | if (list_empty(&walk->all)) |
284fa7da | 1638 | x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all); |
12a169e7 | 1639 | else |
80077702 | 1640 | x = list_first_entry(&walk->all, struct xfrm_state_walk, all); |
284fa7da | 1641 | list_for_each_entry_from(x, &net->xfrm.state_all, all) { |
12a169e7 | 1642 | if (x->state == XFRM_STATE_DEAD) |
4c563f76 | 1643 | continue; |
12a169e7 HX |
1644 | state = container_of(x, struct xfrm_state, km); |
1645 | if (!xfrm_id_proto_match(state->id.proto, walk->proto)) | |
4c563f76 | 1646 | continue; |
d3623099 ND |
1647 | if (!__xfrm_state_filter_match(state, walk->filter)) |
1648 | continue; | |
12a169e7 HX |
1649 | err = func(state, walk->seq, data); |
1650 | if (err) { | |
1651 | list_move_tail(&walk->all, &x->all); | |
1652 | goto out; | |
1da177e4 | 1653 | } |
12a169e7 | 1654 | walk->seq++; |
1da177e4 | 1655 | } |
12a169e7 | 1656 | if (walk->seq == 0) { |
1da177e4 LT |
1657 | err = -ENOENT; |
1658 | goto out; | |
1659 | } | |
12a169e7 | 1660 | list_del_init(&walk->all); |
1da177e4 | 1661 | out: |
283bc9f3 | 1662 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1663 | return err; |
1664 | } | |
1665 | EXPORT_SYMBOL(xfrm_state_walk); | |
1666 | ||
d3623099 | 1667 | void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto, |
870a2df4 | 1668 | struct xfrm_address_filter *filter) |
5c182458 | 1669 | { |
12a169e7 | 1670 | INIT_LIST_HEAD(&walk->all); |
5c182458 | 1671 | walk->proto = proto; |
12a169e7 HX |
1672 | walk->state = XFRM_STATE_DEAD; |
1673 | walk->seq = 0; | |
d3623099 | 1674 | walk->filter = filter; |
5c182458 HX |
1675 | } |
1676 | EXPORT_SYMBOL(xfrm_state_walk_init); | |
1677 | ||
283bc9f3 | 1678 | void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net) |
abb81c4f | 1679 | { |
d3623099 ND |
1680 | kfree(walk->filter); |
1681 | ||
12a169e7 | 1682 | if (list_empty(&walk->all)) |
5c182458 | 1683 | return; |
5c182458 | 1684 | |
283bc9f3 | 1685 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12a169e7 | 1686 | list_del(&walk->all); |
283bc9f3 | 1687 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
abb81c4f HX |
1688 | } |
1689 | EXPORT_SYMBOL(xfrm_state_walk_done); | |
1690 | ||
f8cd5488 JHS |
1691 | static void xfrm_replay_timer_handler(unsigned long data) |
1692 | { | |
3e94c2dc | 1693 | struct xfrm_state *x = (struct xfrm_state *)data; |
f8cd5488 JHS |
1694 | |
1695 | spin_lock(&x->lock); | |
1696 | ||
2717096a | 1697 | if (x->km.state == XFRM_STATE_VALID) { |
a6483b79 | 1698 | if (xfrm_aevent_is_on(xs_net(x))) |
9fdc4883 | 1699 | x->repl->notify(x, XFRM_REPLAY_TIMEOUT); |
2717096a JHS |
1700 | else |
1701 | x->xflags |= XFRM_TIME_DEFER; | |
1702 | } | |
f8cd5488 JHS |
1703 | |
1704 | spin_unlock(&x->lock); | |
1705 | } | |
1706 | ||
df01812e | 1707 | static LIST_HEAD(xfrm_km_list); |
1da177e4 | 1708 | |
214e005b | 1709 | void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
1da177e4 LT |
1710 | { |
1711 | struct xfrm_mgr *km; | |
1712 | ||
85168c00 CW |
1713 | rcu_read_lock(); |
1714 | list_for_each_entry_rcu(km, &xfrm_km_list, list) | |
26b15dad JHS |
1715 | if (km->notify_policy) |
1716 | km->notify_policy(xp, dir, c); | |
85168c00 | 1717 | rcu_read_unlock(); |
26b15dad | 1718 | } |
1da177e4 | 1719 | |
214e005b | 1720 | void km_state_notify(struct xfrm_state *x, const struct km_event *c) |
26b15dad JHS |
1721 | { |
1722 | struct xfrm_mgr *km; | |
85168c00 CW |
1723 | rcu_read_lock(); |
1724 | list_for_each_entry_rcu(km, &xfrm_km_list, list) | |
26b15dad JHS |
1725 | if (km->notify) |
1726 | km->notify(x, c); | |
85168c00 | 1727 | rcu_read_unlock(); |
26b15dad JHS |
1728 | } |
1729 | ||
1730 | EXPORT_SYMBOL(km_policy_notify); | |
1731 | EXPORT_SYMBOL(km_state_notify); | |
1732 | ||
15e47304 | 1733 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid) |
26b15dad JHS |
1734 | { |
1735 | struct km_event c; | |
1736 | ||
bf08867f | 1737 | c.data.hard = hard; |
15e47304 | 1738 | c.portid = portid; |
f60f6b8f | 1739 | c.event = XFRM_MSG_EXPIRE; |
26b15dad | 1740 | km_state_notify(x, &c); |
1da177e4 LT |
1741 | } |
1742 | ||
53bc6b4d | 1743 | EXPORT_SYMBOL(km_state_expired); |
26b15dad JHS |
1744 | /* |
1745 | * We send to all registered managers regardless of failure | |
1746 | * We are happy with one success | |
1747 | */ | |
980ebd25 | 1748 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol) |
1da177e4 | 1749 | { |
26b15dad | 1750 | int err = -EINVAL, acqret; |
1da177e4 LT |
1751 | struct xfrm_mgr *km; |
1752 | ||
85168c00 CW |
1753 | rcu_read_lock(); |
1754 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
65e0736b | 1755 | acqret = km->acquire(x, t, pol); |
26b15dad JHS |
1756 | if (!acqret) |
1757 | err = acqret; | |
1da177e4 | 1758 | } |
85168c00 | 1759 | rcu_read_unlock(); |
1da177e4 LT |
1760 | return err; |
1761 | } | |
980ebd25 | 1762 | EXPORT_SYMBOL(km_query); |
1da177e4 | 1763 | |
5d36b180 | 1764 | int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) |
1da177e4 LT |
1765 | { |
1766 | int err = -EINVAL; | |
1767 | struct xfrm_mgr *km; | |
1768 | ||
85168c00 CW |
1769 | rcu_read_lock(); |
1770 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
1da177e4 LT |
1771 | if (km->new_mapping) |
1772 | err = km->new_mapping(x, ipaddr, sport); | |
1773 | if (!err) | |
1774 | break; | |
1775 | } | |
85168c00 | 1776 | rcu_read_unlock(); |
1da177e4 LT |
1777 | return err; |
1778 | } | |
1779 | EXPORT_SYMBOL(km_new_mapping); | |
1780 | ||
15e47304 | 1781 | void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid) |
1da177e4 | 1782 | { |
26b15dad | 1783 | struct km_event c; |
1da177e4 | 1784 | |
bf08867f | 1785 | c.data.hard = hard; |
15e47304 | 1786 | c.portid = portid; |
f60f6b8f | 1787 | c.event = XFRM_MSG_POLEXPIRE; |
26b15dad | 1788 | km_policy_notify(pol, dir, &c); |
1da177e4 | 1789 | } |
a70fcb0b | 1790 | EXPORT_SYMBOL(km_policy_expired); |
1da177e4 | 1791 | |
2d60abc2 | 1792 | #ifdef CONFIG_XFRM_MIGRATE |
183cad12 DM |
1793 | int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1794 | const struct xfrm_migrate *m, int num_migrate, | |
1795 | const struct xfrm_kmaddress *k) | |
80c9abaa SS |
1796 | { |
1797 | int err = -EINVAL; | |
1798 | int ret; | |
1799 | struct xfrm_mgr *km; | |
1800 | ||
85168c00 CW |
1801 | rcu_read_lock(); |
1802 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
80c9abaa | 1803 | if (km->migrate) { |
13c1d189 | 1804 | ret = km->migrate(sel, dir, type, m, num_migrate, k); |
80c9abaa SS |
1805 | if (!ret) |
1806 | err = ret; | |
1807 | } | |
1808 | } | |
85168c00 | 1809 | rcu_read_unlock(); |
80c9abaa SS |
1810 | return err; |
1811 | } | |
1812 | EXPORT_SYMBOL(km_migrate); | |
2d60abc2 | 1813 | #endif |
80c9abaa | 1814 | |
db983c11 | 1815 | int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr) |
97a64b45 MN |
1816 | { |
1817 | int err = -EINVAL; | |
1818 | int ret; | |
1819 | struct xfrm_mgr *km; | |
1820 | ||
85168c00 CW |
1821 | rcu_read_lock(); |
1822 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
97a64b45 | 1823 | if (km->report) { |
db983c11 | 1824 | ret = km->report(net, proto, sel, addr); |
97a64b45 MN |
1825 | if (!ret) |
1826 | err = ret; | |
1827 | } | |
1828 | } | |
85168c00 | 1829 | rcu_read_unlock(); |
97a64b45 MN |
1830 | return err; |
1831 | } | |
1832 | EXPORT_SYMBOL(km_report); | |
1833 | ||
0f24558e HG |
1834 | bool km_is_alive(const struct km_event *c) |
1835 | { | |
1836 | struct xfrm_mgr *km; | |
1837 | bool is_alive = false; | |
1838 | ||
1839 | rcu_read_lock(); | |
1840 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
1841 | if (km->is_alive && km->is_alive(c)) { | |
1842 | is_alive = true; | |
1843 | break; | |
1844 | } | |
1845 | } | |
1846 | rcu_read_unlock(); | |
1847 | ||
1848 | return is_alive; | |
1849 | } | |
1850 | EXPORT_SYMBOL(km_is_alive); | |
1851 | ||
1da177e4 LT |
1852 | int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) |
1853 | { | |
1854 | int err; | |
1855 | u8 *data; | |
1856 | struct xfrm_mgr *km; | |
1857 | struct xfrm_policy *pol = NULL; | |
1858 | ||
1859 | if (optlen <= 0 || optlen > PAGE_SIZE) | |
1860 | return -EMSGSIZE; | |
1861 | ||
1862 | data = kmalloc(optlen, GFP_KERNEL); | |
1863 | if (!data) | |
1864 | return -ENOMEM; | |
1865 | ||
1866 | err = -EFAULT; | |
1867 | if (copy_from_user(data, optval, optlen)) | |
1868 | goto out; | |
1869 | ||
1870 | err = -EINVAL; | |
85168c00 CW |
1871 | rcu_read_lock(); |
1872 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
cb969f07 | 1873 | pol = km->compile_policy(sk, optname, data, |
1da177e4 LT |
1874 | optlen, &err); |
1875 | if (err >= 0) | |
1876 | break; | |
1877 | } | |
85168c00 | 1878 | rcu_read_unlock(); |
1da177e4 LT |
1879 | |
1880 | if (err >= 0) { | |
1881 | xfrm_sk_policy_insert(sk, err, pol); | |
1882 | xfrm_pol_put(pol); | |
1883 | err = 0; | |
1884 | } | |
1885 | ||
1886 | out: | |
1887 | kfree(data); | |
1888 | return err; | |
1889 | } | |
1890 | EXPORT_SYMBOL(xfrm_user_policy); | |
1891 | ||
85168c00 CW |
1892 | static DEFINE_SPINLOCK(xfrm_km_lock); |
1893 | ||
1da177e4 LT |
1894 | int xfrm_register_km(struct xfrm_mgr *km) |
1895 | { | |
85168c00 CW |
1896 | spin_lock_bh(&xfrm_km_lock); |
1897 | list_add_tail_rcu(&km->list, &xfrm_km_list); | |
1898 | spin_unlock_bh(&xfrm_km_lock); | |
1da177e4 LT |
1899 | return 0; |
1900 | } | |
1901 | EXPORT_SYMBOL(xfrm_register_km); | |
1902 | ||
1903 | int xfrm_unregister_km(struct xfrm_mgr *km) | |
1904 | { | |
85168c00 CW |
1905 | spin_lock_bh(&xfrm_km_lock); |
1906 | list_del_rcu(&km->list); | |
1907 | spin_unlock_bh(&xfrm_km_lock); | |
1908 | synchronize_rcu(); | |
1da177e4 LT |
1909 | return 0; |
1910 | } | |
1911 | EXPORT_SYMBOL(xfrm_unregister_km); | |
1912 | ||
1913 | int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo) | |
1914 | { | |
1915 | int err = 0; | |
1916 | if (unlikely(afinfo == NULL)) | |
1917 | return -EINVAL; | |
1918 | if (unlikely(afinfo->family >= NPROTO)) | |
1919 | return -EAFNOSUPPORT; | |
44abdc30 | 1920 | spin_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 | 1921 | if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL)) |
f31e8d4f | 1922 | err = -EEXIST; |
edcd5821 | 1923 | else |
44abdc30 CW |
1924 | rcu_assign_pointer(xfrm_state_afinfo[afinfo->family], afinfo); |
1925 | spin_unlock_bh(&xfrm_state_afinfo_lock); | |
1da177e4 LT |
1926 | return err; |
1927 | } | |
1928 | EXPORT_SYMBOL(xfrm_state_register_afinfo); | |
1929 | ||
1930 | int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo) | |
1931 | { | |
1932 | int err = 0; | |
1933 | if (unlikely(afinfo == NULL)) | |
1934 | return -EINVAL; | |
1935 | if (unlikely(afinfo->family >= NPROTO)) | |
1936 | return -EAFNOSUPPORT; | |
44abdc30 | 1937 | spin_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1938 | if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) { |
1939 | if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo)) | |
1940 | err = -EINVAL; | |
edcd5821 | 1941 | else |
44abdc30 | 1942 | RCU_INIT_POINTER(xfrm_state_afinfo[afinfo->family], NULL); |
1da177e4 | 1943 | } |
44abdc30 CW |
1944 | spin_unlock_bh(&xfrm_state_afinfo_lock); |
1945 | synchronize_rcu(); | |
1da177e4 LT |
1946 | return err; |
1947 | } | |
1948 | EXPORT_SYMBOL(xfrm_state_unregister_afinfo); | |
1949 | ||
628e341f | 1950 | struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family) |
1da177e4 LT |
1951 | { |
1952 | struct xfrm_state_afinfo *afinfo; | |
1953 | if (unlikely(family >= NPROTO)) | |
1954 | return NULL; | |
44abdc30 CW |
1955 | rcu_read_lock(); |
1956 | afinfo = rcu_dereference(xfrm_state_afinfo[family]); | |
546be240 | 1957 | if (unlikely(!afinfo)) |
44abdc30 | 1958 | rcu_read_unlock(); |
1da177e4 LT |
1959 | return afinfo; |
1960 | } | |
1961 | ||
628e341f | 1962 | void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo) |
1da177e4 | 1963 | { |
44abdc30 | 1964 | rcu_read_unlock(); |
1da177e4 LT |
1965 | } |
1966 | ||
1967 | /* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */ | |
1968 | void xfrm_state_delete_tunnel(struct xfrm_state *x) | |
1969 | { | |
1970 | if (x->tunnel) { | |
1971 | struct xfrm_state *t = x->tunnel; | |
1972 | ||
1973 | if (atomic_read(&t->tunnel_users) == 2) | |
1974 | xfrm_state_delete(t); | |
1975 | atomic_dec(&t->tunnel_users); | |
1976 | xfrm_state_put(t); | |
1977 | x->tunnel = NULL; | |
1978 | } | |
1979 | } | |
1980 | EXPORT_SYMBOL(xfrm_state_delete_tunnel); | |
1981 | ||
1982 | int xfrm_state_mtu(struct xfrm_state *x, int mtu) | |
1983 | { | |
c5c25238 | 1984 | int res; |
1da177e4 | 1985 | |
c5c25238 PM |
1986 | spin_lock_bh(&x->lock); |
1987 | if (x->km.state == XFRM_STATE_VALID && | |
1988 | x->type && x->type->get_mtu) | |
1989 | res = x->type->get_mtu(x, mtu); | |
1990 | else | |
28121617 | 1991 | res = mtu - x->props.header_len; |
c5c25238 | 1992 | spin_unlock_bh(&x->lock); |
1da177e4 LT |
1993 | return res; |
1994 | } | |
1995 | ||
a454f0cc | 1996 | int __xfrm_init_state(struct xfrm_state *x, bool init_replay) |
72cb6962 | 1997 | { |
d094cd83 | 1998 | struct xfrm_state_afinfo *afinfo; |
df9dcb45 | 1999 | struct xfrm_mode *inner_mode; |
d094cd83 | 2000 | int family = x->props.family; |
72cb6962 HX |
2001 | int err; |
2002 | ||
d094cd83 HX |
2003 | err = -EAFNOSUPPORT; |
2004 | afinfo = xfrm_state_get_afinfo(family); | |
2005 | if (!afinfo) | |
2006 | goto error; | |
2007 | ||
2008 | err = 0; | |
2009 | if (afinfo->init_flags) | |
2010 | err = afinfo->init_flags(x); | |
2011 | ||
2012 | xfrm_state_put_afinfo(afinfo); | |
2013 | ||
2014 | if (err) | |
2015 | goto error; | |
2016 | ||
2017 | err = -EPROTONOSUPPORT; | |
13996378 | 2018 | |
df9dcb45 KM |
2019 | if (x->sel.family != AF_UNSPEC) { |
2020 | inner_mode = xfrm_get_mode(x->props.mode, x->sel.family); | |
2021 | if (inner_mode == NULL) | |
2022 | goto error; | |
2023 | ||
2024 | if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) && | |
2025 | family != x->sel.family) { | |
2026 | xfrm_put_mode(inner_mode); | |
2027 | goto error; | |
2028 | } | |
2029 | ||
2030 | x->inner_mode = inner_mode; | |
2031 | } else { | |
2032 | struct xfrm_mode *inner_mode_iaf; | |
d81d2285 | 2033 | int iafamily = AF_INET; |
df9dcb45 | 2034 | |
d81d2285 | 2035 | inner_mode = xfrm_get_mode(x->props.mode, x->props.family); |
df9dcb45 KM |
2036 | if (inner_mode == NULL) |
2037 | goto error; | |
2038 | ||
2039 | if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) { | |
2040 | xfrm_put_mode(inner_mode); | |
2041 | goto error; | |
2042 | } | |
d81d2285 | 2043 | x->inner_mode = inner_mode; |
df9dcb45 | 2044 | |
d81d2285 MW |
2045 | if (x->props.family == AF_INET) |
2046 | iafamily = AF_INET6; | |
df9dcb45 | 2047 | |
d81d2285 MW |
2048 | inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily); |
2049 | if (inner_mode_iaf) { | |
2050 | if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL) | |
2051 | x->inner_mode_iaf = inner_mode_iaf; | |
2052 | else | |
2053 | xfrm_put_mode(inner_mode_iaf); | |
df9dcb45 KM |
2054 | } |
2055 | } | |
13996378 | 2056 | |
d094cd83 | 2057 | x->type = xfrm_get_type(x->id.proto, family); |
72cb6962 HX |
2058 | if (x->type == NULL) |
2059 | goto error; | |
2060 | ||
2061 | err = x->type->init_state(x); | |
2062 | if (err) | |
2063 | goto error; | |
2064 | ||
13996378 | 2065 | x->outer_mode = xfrm_get_mode(x->props.mode, family); |
599901c3 JL |
2066 | if (x->outer_mode == NULL) { |
2067 | err = -EPROTONOSUPPORT; | |
b59f45d0 | 2068 | goto error; |
599901c3 | 2069 | } |
b59f45d0 | 2070 | |
a454f0cc WY |
2071 | if (init_replay) { |
2072 | err = xfrm_init_replay(x); | |
2073 | if (err) | |
2074 | goto error; | |
2075 | } | |
2076 | ||
72cb6962 HX |
2077 | x->km.state = XFRM_STATE_VALID; |
2078 | ||
2079 | error: | |
2080 | return err; | |
2081 | } | |
2082 | ||
a454f0cc WY |
2083 | EXPORT_SYMBOL(__xfrm_init_state); |
2084 | ||
2085 | int xfrm_init_state(struct xfrm_state *x) | |
2086 | { | |
2087 | return __xfrm_init_state(x, true); | |
2088 | } | |
2089 | ||
72cb6962 | 2090 | EXPORT_SYMBOL(xfrm_init_state); |
a716c119 | 2091 | |
d62ddc21 | 2092 | int __net_init xfrm_state_init(struct net *net) |
1da177e4 | 2093 | { |
f034b5d4 DM |
2094 | unsigned int sz; |
2095 | ||
9d4139c7 AD |
2096 | INIT_LIST_HEAD(&net->xfrm.state_all); |
2097 | ||
f034b5d4 DM |
2098 | sz = sizeof(struct hlist_head) * 8; |
2099 | ||
73d189dc AD |
2100 | net->xfrm.state_bydst = xfrm_hash_alloc(sz); |
2101 | if (!net->xfrm.state_bydst) | |
2102 | goto out_bydst; | |
d320bbb3 AD |
2103 | net->xfrm.state_bysrc = xfrm_hash_alloc(sz); |
2104 | if (!net->xfrm.state_bysrc) | |
2105 | goto out_bysrc; | |
b754a4fd AD |
2106 | net->xfrm.state_byspi = xfrm_hash_alloc(sz); |
2107 | if (!net->xfrm.state_byspi) | |
2108 | goto out_byspi; | |
529983ec | 2109 | net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1); |
1da177e4 | 2110 | |
0bf7c5b0 | 2111 | net->xfrm.state_num = 0; |
63082733 | 2112 | INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize); |
b8a0ae20 | 2113 | INIT_HLIST_HEAD(&net->xfrm.state_gc_list); |
c7837144 | 2114 | INIT_WORK(&net->xfrm.state_gc_work, xfrm_state_gc_task); |
283bc9f3 | 2115 | spin_lock_init(&net->xfrm.xfrm_state_lock); |
d62ddc21 | 2116 | return 0; |
73d189dc | 2117 | |
b754a4fd AD |
2118 | out_byspi: |
2119 | xfrm_hash_free(net->xfrm.state_bysrc, sz); | |
d320bbb3 AD |
2120 | out_bysrc: |
2121 | xfrm_hash_free(net->xfrm.state_bydst, sz); | |
73d189dc AD |
2122 | out_bydst: |
2123 | return -ENOMEM; | |
d62ddc21 AD |
2124 | } |
2125 | ||
2126 | void xfrm_state_fini(struct net *net) | |
2127 | { | |
73d189dc AD |
2128 | unsigned int sz; |
2129 | ||
7c2776ee | 2130 | flush_work(&net->xfrm.state_hash_work); |
2e71029e | 2131 | xfrm_state_flush(net, IPSEC_PROTO_ANY, false); |
7c2776ee AD |
2132 | flush_work(&net->xfrm.state_gc_work); |
2133 | ||
9d4139c7 | 2134 | WARN_ON(!list_empty(&net->xfrm.state_all)); |
73d189dc | 2135 | |
529983ec | 2136 | sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head); |
b754a4fd AD |
2137 | WARN_ON(!hlist_empty(net->xfrm.state_byspi)); |
2138 | xfrm_hash_free(net->xfrm.state_byspi, sz); | |
d320bbb3 AD |
2139 | WARN_ON(!hlist_empty(net->xfrm.state_bysrc)); |
2140 | xfrm_hash_free(net->xfrm.state_bysrc, sz); | |
73d189dc AD |
2141 | WARN_ON(!hlist_empty(net->xfrm.state_bydst)); |
2142 | xfrm_hash_free(net->xfrm.state_bydst, sz); | |
1da177e4 LT |
2143 | } |
2144 | ||
ab5f5e8b | 2145 | #ifdef CONFIG_AUDITSYSCALL |
cf35f43e IJ |
2146 | static void xfrm_audit_helper_sainfo(struct xfrm_state *x, |
2147 | struct audit_buffer *audit_buf) | |
ab5f5e8b | 2148 | { |
68277acc PM |
2149 | struct xfrm_sec_ctx *ctx = x->security; |
2150 | u32 spi = ntohl(x->id.spi); | |
2151 | ||
2152 | if (ctx) | |
ab5f5e8b | 2153 | audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s", |
68277acc | 2154 | ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str); |
ab5f5e8b | 2155 | |
9b7a787d | 2156 | switch (x->props.family) { |
ab5f5e8b | 2157 | case AF_INET: |
21454aaa HH |
2158 | audit_log_format(audit_buf, " src=%pI4 dst=%pI4", |
2159 | &x->props.saddr.a4, &x->id.daddr.a4); | |
ab5f5e8b JL |
2160 | break; |
2161 | case AF_INET6: | |
5b095d98 | 2162 | audit_log_format(audit_buf, " src=%pI6 dst=%pI6", |
fdb46ee7 | 2163 | x->props.saddr.a6, x->id.daddr.a6); |
ab5f5e8b JL |
2164 | break; |
2165 | } | |
68277acc PM |
2166 | |
2167 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
ab5f5e8b JL |
2168 | } |
2169 | ||
cf35f43e IJ |
2170 | static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family, |
2171 | struct audit_buffer *audit_buf) | |
afeb14b4 | 2172 | { |
b71d1d42 ED |
2173 | const struct iphdr *iph4; |
2174 | const struct ipv6hdr *iph6; | |
afeb14b4 PM |
2175 | |
2176 | switch (family) { | |
2177 | case AF_INET: | |
2178 | iph4 = ip_hdr(skb); | |
21454aaa HH |
2179 | audit_log_format(audit_buf, " src=%pI4 dst=%pI4", |
2180 | &iph4->saddr, &iph4->daddr); | |
afeb14b4 PM |
2181 | break; |
2182 | case AF_INET6: | |
2183 | iph6 = ipv6_hdr(skb); | |
2184 | audit_log_format(audit_buf, | |
5b095d98 | 2185 | " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x", |
9b7a787d | 2186 | &iph6->saddr, &iph6->daddr, |
afeb14b4 PM |
2187 | iph6->flow_lbl[0] & 0x0f, |
2188 | iph6->flow_lbl[1], | |
2189 | iph6->flow_lbl[2]); | |
2190 | break; | |
2191 | } | |
2192 | } | |
2193 | ||
2e71029e | 2194 | void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid) |
ab5f5e8b JL |
2195 | { |
2196 | struct audit_buffer *audit_buf; | |
ab5f5e8b | 2197 | |
afeb14b4 | 2198 | audit_buf = xfrm_audit_start("SAD-add"); |
ab5f5e8b JL |
2199 | if (audit_buf == NULL) |
2200 | return; | |
2e71029e | 2201 | xfrm_audit_helper_usrinfo(task_valid, audit_buf); |
afeb14b4 PM |
2202 | xfrm_audit_helper_sainfo(x, audit_buf); |
2203 | audit_log_format(audit_buf, " res=%u", result); | |
ab5f5e8b JL |
2204 | audit_log_end(audit_buf); |
2205 | } | |
2206 | EXPORT_SYMBOL_GPL(xfrm_audit_state_add); | |
2207 | ||
2e71029e | 2208 | void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid) |
ab5f5e8b JL |
2209 | { |
2210 | struct audit_buffer *audit_buf; | |
ab5f5e8b | 2211 | |
afeb14b4 | 2212 | audit_buf = xfrm_audit_start("SAD-delete"); |
ab5f5e8b JL |
2213 | if (audit_buf == NULL) |
2214 | return; | |
2e71029e | 2215 | xfrm_audit_helper_usrinfo(task_valid, audit_buf); |
afeb14b4 PM |
2216 | xfrm_audit_helper_sainfo(x, audit_buf); |
2217 | audit_log_format(audit_buf, " res=%u", result); | |
ab5f5e8b JL |
2218 | audit_log_end(audit_buf); |
2219 | } | |
2220 | EXPORT_SYMBOL_GPL(xfrm_audit_state_delete); | |
afeb14b4 PM |
2221 | |
2222 | void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
2223 | struct sk_buff *skb) | |
2224 | { | |
2225 | struct audit_buffer *audit_buf; | |
2226 | u32 spi; | |
2227 | ||
2228 | audit_buf = xfrm_audit_start("SA-replay-overflow"); | |
2229 | if (audit_buf == NULL) | |
2230 | return; | |
2231 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2232 | /* don't record the sequence number because it's inherent in this kind | |
2233 | * of audit message */ | |
2234 | spi = ntohl(x->id.spi); | |
2235 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
2236 | audit_log_end(audit_buf); | |
2237 | } | |
2238 | EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow); | |
2239 | ||
9fdc4883 | 2240 | void xfrm_audit_state_replay(struct xfrm_state *x, |
afeb14b4 PM |
2241 | struct sk_buff *skb, __be32 net_seq) |
2242 | { | |
2243 | struct audit_buffer *audit_buf; | |
2244 | u32 spi; | |
2245 | ||
2246 | audit_buf = xfrm_audit_start("SA-replayed-pkt"); | |
2247 | if (audit_buf == NULL) | |
2248 | return; | |
2249 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2250 | spi = ntohl(x->id.spi); | |
2251 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2252 | spi, spi, ntohl(net_seq)); | |
2253 | audit_log_end(audit_buf); | |
2254 | } | |
9fdc4883 | 2255 | EXPORT_SYMBOL_GPL(xfrm_audit_state_replay); |
afeb14b4 PM |
2256 | |
2257 | void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family) | |
2258 | { | |
2259 | struct audit_buffer *audit_buf; | |
2260 | ||
2261 | audit_buf = xfrm_audit_start("SA-notfound"); | |
2262 | if (audit_buf == NULL) | |
2263 | return; | |
2264 | xfrm_audit_helper_pktinfo(skb, family, audit_buf); | |
2265 | audit_log_end(audit_buf); | |
2266 | } | |
2267 | EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple); | |
2268 | ||
2269 | void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
2270 | __be32 net_spi, __be32 net_seq) | |
2271 | { | |
2272 | struct audit_buffer *audit_buf; | |
2273 | u32 spi; | |
2274 | ||
2275 | audit_buf = xfrm_audit_start("SA-notfound"); | |
2276 | if (audit_buf == NULL) | |
2277 | return; | |
2278 | xfrm_audit_helper_pktinfo(skb, family, audit_buf); | |
2279 | spi = ntohl(net_spi); | |
2280 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2281 | spi, spi, ntohl(net_seq)); | |
2282 | audit_log_end(audit_buf); | |
2283 | } | |
2284 | EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound); | |
2285 | ||
2286 | void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
2287 | struct sk_buff *skb, u8 proto) | |
2288 | { | |
2289 | struct audit_buffer *audit_buf; | |
2290 | __be32 net_spi; | |
2291 | __be32 net_seq; | |
2292 | ||
2293 | audit_buf = xfrm_audit_start("SA-icv-failure"); | |
2294 | if (audit_buf == NULL) | |
2295 | return; | |
2296 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2297 | if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) { | |
2298 | u32 spi = ntohl(net_spi); | |
2299 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2300 | spi, spi, ntohl(net_seq)); | |
2301 | } | |
2302 | audit_log_end(audit_buf); | |
2303 | } | |
2304 | EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail); | |
ab5f5e8b | 2305 | #endif /* CONFIG_AUDITSYSCALL */ |