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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); | |
df7274eb FW |
149 | |
150 | synchronize_rcu(); | |
151 | ||
44e36b42 DM |
152 | xfrm_hash_free(odst, osize); |
153 | xfrm_hash_free(osrc, osize); | |
154 | xfrm_hash_free(ospi, osize); | |
f034b5d4 DM |
155 | } |
156 | ||
44abdc30 CW |
157 | static DEFINE_SPINLOCK(xfrm_state_afinfo_lock); |
158 | static struct xfrm_state_afinfo __rcu *xfrm_state_afinfo[NPROTO]; | |
1da177e4 | 159 | |
1da177e4 LT |
160 | static DEFINE_SPINLOCK(xfrm_state_gc_lock); |
161 | ||
53bc6b4d | 162 | int __xfrm_state_delete(struct xfrm_state *x); |
1da177e4 | 163 | |
980ebd25 | 164 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); |
0f24558e | 165 | bool km_is_alive(const struct km_event *c); |
15e47304 | 166 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid); |
1da177e4 | 167 | |
7a9885b9 | 168 | static DEFINE_SPINLOCK(xfrm_type_lock); |
533cb5b0 | 169 | int xfrm_register_type(const struct xfrm_type *type, unsigned short family) |
aa5d62cc | 170 | { |
7a9885b9 | 171 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); |
533cb5b0 | 172 | const struct xfrm_type **typemap; |
aa5d62cc HX |
173 | int err = 0; |
174 | ||
175 | if (unlikely(afinfo == NULL)) | |
176 | return -EAFNOSUPPORT; | |
177 | typemap = afinfo->type_map; | |
7a9885b9 | 178 | spin_lock_bh(&xfrm_type_lock); |
aa5d62cc HX |
179 | |
180 | if (likely(typemap[type->proto] == NULL)) | |
181 | typemap[type->proto] = type; | |
182 | else | |
183 | err = -EEXIST; | |
7a9885b9 CW |
184 | spin_unlock_bh(&xfrm_type_lock); |
185 | xfrm_state_put_afinfo(afinfo); | |
aa5d62cc HX |
186 | return err; |
187 | } | |
188 | EXPORT_SYMBOL(xfrm_register_type); | |
189 | ||
533cb5b0 | 190 | int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family) |
aa5d62cc | 191 | { |
7a9885b9 | 192 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); |
533cb5b0 | 193 | const struct xfrm_type **typemap; |
aa5d62cc HX |
194 | int err = 0; |
195 | ||
196 | if (unlikely(afinfo == NULL)) | |
197 | return -EAFNOSUPPORT; | |
198 | typemap = afinfo->type_map; | |
7a9885b9 | 199 | spin_lock_bh(&xfrm_type_lock); |
aa5d62cc HX |
200 | |
201 | if (unlikely(typemap[type->proto] != type)) | |
202 | err = -ENOENT; | |
203 | else | |
204 | typemap[type->proto] = NULL; | |
7a9885b9 CW |
205 | spin_unlock_bh(&xfrm_type_lock); |
206 | xfrm_state_put_afinfo(afinfo); | |
aa5d62cc HX |
207 | return err; |
208 | } | |
209 | EXPORT_SYMBOL(xfrm_unregister_type); | |
210 | ||
533cb5b0 | 211 | static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family) |
aa5d62cc HX |
212 | { |
213 | struct xfrm_state_afinfo *afinfo; | |
533cb5b0 ED |
214 | const struct xfrm_type **typemap; |
215 | const struct xfrm_type *type; | |
aa5d62cc HX |
216 | int modload_attempted = 0; |
217 | ||
218 | retry: | |
219 | afinfo = xfrm_state_get_afinfo(family); | |
220 | if (unlikely(afinfo == NULL)) | |
221 | return NULL; | |
222 | typemap = afinfo->type_map; | |
223 | ||
224 | type = typemap[proto]; | |
225 | if (unlikely(type && !try_module_get(type->owner))) | |
226 | type = NULL; | |
227 | if (!type && !modload_attempted) { | |
228 | xfrm_state_put_afinfo(afinfo); | |
229 | request_module("xfrm-type-%d-%d", family, proto); | |
230 | modload_attempted = 1; | |
231 | goto retry; | |
232 | } | |
233 | ||
234 | xfrm_state_put_afinfo(afinfo); | |
235 | return type; | |
236 | } | |
237 | ||
533cb5b0 | 238 | static void xfrm_put_type(const struct xfrm_type *type) |
aa5d62cc HX |
239 | { |
240 | module_put(type->owner); | |
241 | } | |
242 | ||
7a9885b9 | 243 | static DEFINE_SPINLOCK(xfrm_mode_lock); |
aa5d62cc HX |
244 | int xfrm_register_mode(struct xfrm_mode *mode, int family) |
245 | { | |
246 | struct xfrm_state_afinfo *afinfo; | |
247 | struct xfrm_mode **modemap; | |
248 | int err; | |
249 | ||
250 | if (unlikely(mode->encap >= XFRM_MODE_MAX)) | |
251 | return -EINVAL; | |
252 | ||
7a9885b9 | 253 | afinfo = xfrm_state_get_afinfo(family); |
aa5d62cc HX |
254 | if (unlikely(afinfo == NULL)) |
255 | return -EAFNOSUPPORT; | |
256 | ||
257 | err = -EEXIST; | |
258 | modemap = afinfo->mode_map; | |
7a9885b9 | 259 | spin_lock_bh(&xfrm_mode_lock); |
17c2a42a HX |
260 | if (modemap[mode->encap]) |
261 | goto out; | |
aa5d62cc | 262 | |
17c2a42a HX |
263 | err = -ENOENT; |
264 | if (!try_module_get(afinfo->owner)) | |
265 | goto out; | |
266 | ||
267 | mode->afinfo = afinfo; | |
268 | modemap[mode->encap] = mode; | |
269 | err = 0; | |
270 | ||
271 | out: | |
7a9885b9 CW |
272 | spin_unlock_bh(&xfrm_mode_lock); |
273 | xfrm_state_put_afinfo(afinfo); | |
aa5d62cc HX |
274 | return err; |
275 | } | |
276 | EXPORT_SYMBOL(xfrm_register_mode); | |
277 | ||
278 | int xfrm_unregister_mode(struct xfrm_mode *mode, int family) | |
279 | { | |
280 | struct xfrm_state_afinfo *afinfo; | |
281 | struct xfrm_mode **modemap; | |
282 | int err; | |
283 | ||
284 | if (unlikely(mode->encap >= XFRM_MODE_MAX)) | |
285 | return -EINVAL; | |
286 | ||
7a9885b9 | 287 | afinfo = xfrm_state_get_afinfo(family); |
aa5d62cc HX |
288 | if (unlikely(afinfo == NULL)) |
289 | return -EAFNOSUPPORT; | |
290 | ||
291 | err = -ENOENT; | |
292 | modemap = afinfo->mode_map; | |
7a9885b9 | 293 | spin_lock_bh(&xfrm_mode_lock); |
aa5d62cc HX |
294 | if (likely(modemap[mode->encap] == mode)) { |
295 | modemap[mode->encap] = NULL; | |
17c2a42a | 296 | module_put(mode->afinfo->owner); |
aa5d62cc HX |
297 | err = 0; |
298 | } | |
299 | ||
7a9885b9 CW |
300 | spin_unlock_bh(&xfrm_mode_lock); |
301 | xfrm_state_put_afinfo(afinfo); | |
aa5d62cc HX |
302 | return err; |
303 | } | |
304 | EXPORT_SYMBOL(xfrm_unregister_mode); | |
305 | ||
306 | static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family) | |
307 | { | |
308 | struct xfrm_state_afinfo *afinfo; | |
309 | struct xfrm_mode *mode; | |
310 | int modload_attempted = 0; | |
311 | ||
312 | if (unlikely(encap >= XFRM_MODE_MAX)) | |
313 | return NULL; | |
314 | ||
315 | retry: | |
316 | afinfo = xfrm_state_get_afinfo(family); | |
317 | if (unlikely(afinfo == NULL)) | |
318 | return NULL; | |
319 | ||
320 | mode = afinfo->mode_map[encap]; | |
321 | if (unlikely(mode && !try_module_get(mode->owner))) | |
322 | mode = NULL; | |
323 | if (!mode && !modload_attempted) { | |
324 | xfrm_state_put_afinfo(afinfo); | |
325 | request_module("xfrm-mode-%d-%d", family, encap); | |
326 | modload_attempted = 1; | |
327 | goto retry; | |
328 | } | |
329 | ||
330 | xfrm_state_put_afinfo(afinfo); | |
331 | return mode; | |
332 | } | |
333 | ||
334 | static void xfrm_put_mode(struct xfrm_mode *mode) | |
335 | { | |
336 | module_put(mode->owner); | |
337 | } | |
338 | ||
1da177e4 LT |
339 | static void xfrm_state_gc_destroy(struct xfrm_state *x) |
340 | { | |
9e0d57fd | 341 | tasklet_hrtimer_cancel(&x->mtimer); |
a47f0ce0 | 342 | del_timer_sync(&x->rtimer); |
a51482bd JJ |
343 | kfree(x->aalg); |
344 | kfree(x->ealg); | |
345 | kfree(x->calg); | |
346 | kfree(x->encap); | |
060f02a3 | 347 | kfree(x->coaddr); |
d8647b79 SK |
348 | kfree(x->replay_esn); |
349 | kfree(x->preplay_esn); | |
13996378 HX |
350 | if (x->inner_mode) |
351 | xfrm_put_mode(x->inner_mode); | |
df9dcb45 KM |
352 | if (x->inner_mode_iaf) |
353 | xfrm_put_mode(x->inner_mode_iaf); | |
13996378 HX |
354 | if (x->outer_mode) |
355 | xfrm_put_mode(x->outer_mode); | |
1da177e4 LT |
356 | if (x->type) { |
357 | x->type->destructor(x); | |
358 | xfrm_put_type(x->type); | |
359 | } | |
df71837d | 360 | security_xfrm_state_free(x); |
1da177e4 LT |
361 | kfree(x); |
362 | } | |
363 | ||
c7837144 | 364 | static void xfrm_state_gc_task(struct work_struct *work) |
1da177e4 | 365 | { |
c7837144 | 366 | struct net *net = container_of(work, struct net, xfrm.state_gc_work); |
12a169e7 | 367 | struct xfrm_state *x; |
b67bfe0d | 368 | struct hlist_node *tmp; |
12a169e7 | 369 | struct hlist_head gc_list; |
1da177e4 | 370 | |
1da177e4 | 371 | spin_lock_bh(&xfrm_state_gc_lock); |
c7837144 | 372 | hlist_move_list(&net->xfrm.state_gc_list, &gc_list); |
1da177e4 LT |
373 | spin_unlock_bh(&xfrm_state_gc_lock); |
374 | ||
df7274eb FW |
375 | synchronize_rcu(); |
376 | ||
b67bfe0d | 377 | hlist_for_each_entry_safe(x, tmp, &gc_list, gclist) |
1da177e4 | 378 | xfrm_state_gc_destroy(x); |
1da177e4 LT |
379 | } |
380 | ||
381 | static inline unsigned long make_jiffies(long secs) | |
382 | { | |
383 | if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ) | |
384 | return MAX_SCHEDULE_TIMEOUT-1; | |
385 | else | |
a716c119 | 386 | return secs*HZ; |
1da177e4 LT |
387 | } |
388 | ||
3e94c2dc | 389 | static enum hrtimer_restart xfrm_timer_handler(struct hrtimer *me) |
1da177e4 | 390 | { |
9e0d57fd YP |
391 | struct tasklet_hrtimer *thr = container_of(me, struct tasklet_hrtimer, timer); |
392 | struct xfrm_state *x = container_of(thr, struct xfrm_state, mtimer); | |
9d729f72 | 393 | unsigned long now = get_seconds(); |
1da177e4 LT |
394 | long next = LONG_MAX; |
395 | int warn = 0; | |
161a09e7 | 396 | int err = 0; |
1da177e4 LT |
397 | |
398 | spin_lock(&x->lock); | |
399 | if (x->km.state == XFRM_STATE_DEAD) | |
400 | goto out; | |
401 | if (x->km.state == XFRM_STATE_EXPIRED) | |
402 | goto expired; | |
403 | if (x->lft.hard_add_expires_seconds) { | |
404 | long tmo = x->lft.hard_add_expires_seconds + | |
405 | x->curlft.add_time - now; | |
e3c0d047 FD |
406 | if (tmo <= 0) { |
407 | if (x->xflags & XFRM_SOFT_EXPIRE) { | |
408 | /* enter hard expire without soft expire first?! | |
409 | * setting a new date could trigger this. | |
410 | * workarbound: fix x->curflt.add_time by below: | |
411 | */ | |
412 | x->curlft.add_time = now - x->saved_tmo - 1; | |
413 | tmo = x->lft.hard_add_expires_seconds - x->saved_tmo; | |
414 | } else | |
415 | goto expired; | |
416 | } | |
1da177e4 LT |
417 | if (tmo < next) |
418 | next = tmo; | |
419 | } | |
420 | if (x->lft.hard_use_expires_seconds) { | |
421 | long tmo = x->lft.hard_use_expires_seconds + | |
422 | (x->curlft.use_time ? : now) - now; | |
423 | if (tmo <= 0) | |
424 | goto expired; | |
425 | if (tmo < next) | |
426 | next = tmo; | |
427 | } | |
428 | if (x->km.dying) | |
429 | goto resched; | |
430 | if (x->lft.soft_add_expires_seconds) { | |
431 | long tmo = x->lft.soft_add_expires_seconds + | |
432 | x->curlft.add_time - now; | |
e3c0d047 | 433 | if (tmo <= 0) { |
1da177e4 | 434 | warn = 1; |
e3c0d047 FD |
435 | x->xflags &= ~XFRM_SOFT_EXPIRE; |
436 | } else if (tmo < next) { | |
1da177e4 | 437 | next = tmo; |
e3c0d047 FD |
438 | x->xflags |= XFRM_SOFT_EXPIRE; |
439 | x->saved_tmo = tmo; | |
440 | } | |
1da177e4 LT |
441 | } |
442 | if (x->lft.soft_use_expires_seconds) { | |
443 | long tmo = x->lft.soft_use_expires_seconds + | |
444 | (x->curlft.use_time ? : now) - now; | |
445 | if (tmo <= 0) | |
446 | warn = 1; | |
447 | else if (tmo < next) | |
448 | next = tmo; | |
449 | } | |
450 | ||
4666faab | 451 | x->km.dying = warn; |
1da177e4 | 452 | if (warn) |
53bc6b4d | 453 | km_state_expired(x, 0, 0); |
1da177e4 | 454 | resched: |
9b7a787d | 455 | if (next != LONG_MAX) { |
9e0d57fd YP |
456 | tasklet_hrtimer_start(&x->mtimer, ktime_set(next, 0), HRTIMER_MODE_REL); |
457 | } | |
a47f0ce0 | 458 | |
1da177e4 LT |
459 | goto out; |
460 | ||
461 | expired: | |
5b8ef341 | 462 | if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) |
1da177e4 | 463 | x->km.state = XFRM_STATE_EXPIRED; |
161a09e7 JL |
464 | |
465 | err = __xfrm_state_delete(x); | |
0806ae4c | 466 | if (!err) |
53bc6b4d | 467 | km_state_expired(x, 1, 0); |
1da177e4 | 468 | |
2e71029e | 469 | xfrm_audit_state_delete(x, err ? 0 : 1, true); |
161a09e7 | 470 | |
1da177e4 LT |
471 | out: |
472 | spin_unlock(&x->lock); | |
9e0d57fd | 473 | return HRTIMER_NORESTART; |
1da177e4 LT |
474 | } |
475 | ||
0ac84752 DM |
476 | static void xfrm_replay_timer_handler(unsigned long data); |
477 | ||
673c09be | 478 | struct xfrm_state *xfrm_state_alloc(struct net *net) |
1da177e4 LT |
479 | { |
480 | struct xfrm_state *x; | |
481 | ||
0da974f4 | 482 | x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC); |
1da177e4 LT |
483 | |
484 | if (x) { | |
673c09be | 485 | write_pnet(&x->xs_net, net); |
1da177e4 LT |
486 | atomic_set(&x->refcnt, 1); |
487 | atomic_set(&x->tunnel_users, 0); | |
12a169e7 | 488 | INIT_LIST_HEAD(&x->km.all); |
8f126e37 DM |
489 | INIT_HLIST_NODE(&x->bydst); |
490 | INIT_HLIST_NODE(&x->bysrc); | |
491 | INIT_HLIST_NODE(&x->byspi); | |
99565a6c FD |
492 | tasklet_hrtimer_init(&x->mtimer, xfrm_timer_handler, |
493 | CLOCK_BOOTTIME, HRTIMER_MODE_ABS); | |
b24b8a24 PE |
494 | setup_timer(&x->rtimer, xfrm_replay_timer_handler, |
495 | (unsigned long)x); | |
9d729f72 | 496 | x->curlft.add_time = get_seconds(); |
1da177e4 LT |
497 | x->lft.soft_byte_limit = XFRM_INF; |
498 | x->lft.soft_packet_limit = XFRM_INF; | |
499 | x->lft.hard_byte_limit = XFRM_INF; | |
500 | x->lft.hard_packet_limit = XFRM_INF; | |
f8cd5488 JHS |
501 | x->replay_maxage = 0; |
502 | x->replay_maxdiff = 0; | |
df9dcb45 KM |
503 | x->inner_mode = NULL; |
504 | x->inner_mode_iaf = NULL; | |
1da177e4 LT |
505 | spin_lock_init(&x->lock); |
506 | } | |
507 | return x; | |
508 | } | |
509 | EXPORT_SYMBOL(xfrm_state_alloc); | |
510 | ||
511 | void __xfrm_state_destroy(struct xfrm_state *x) | |
512 | { | |
98806f75 AD |
513 | struct net *net = xs_net(x); |
514 | ||
547b792c | 515 | WARN_ON(x->km.state != XFRM_STATE_DEAD); |
1da177e4 LT |
516 | |
517 | spin_lock_bh(&xfrm_state_gc_lock); | |
98806f75 | 518 | hlist_add_head(&x->gclist, &net->xfrm.state_gc_list); |
1da177e4 | 519 | spin_unlock_bh(&xfrm_state_gc_lock); |
98806f75 | 520 | schedule_work(&net->xfrm.state_gc_work); |
1da177e4 LT |
521 | } |
522 | EXPORT_SYMBOL(__xfrm_state_destroy); | |
523 | ||
53bc6b4d | 524 | int __xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 525 | { |
98806f75 | 526 | struct net *net = xs_net(x); |
26b15dad JHS |
527 | int err = -ESRCH; |
528 | ||
1da177e4 LT |
529 | if (x->km.state != XFRM_STATE_DEAD) { |
530 | x->km.state = XFRM_STATE_DEAD; | |
283bc9f3 | 531 | spin_lock(&net->xfrm.xfrm_state_lock); |
12a169e7 | 532 | list_del(&x->km.all); |
ae3fb6d3 FW |
533 | hlist_del_rcu(&x->bydst); |
534 | hlist_del_rcu(&x->bysrc); | |
a47f0ce0 | 535 | if (x->id.spi) |
ae3fb6d3 | 536 | hlist_del_rcu(&x->byspi); |
98806f75 | 537 | net->xfrm.state_num--; |
283bc9f3 | 538 | spin_unlock(&net->xfrm.xfrm_state_lock); |
1da177e4 | 539 | |
1da177e4 LT |
540 | /* All xfrm_state objects are created by xfrm_state_alloc. |
541 | * The xfrm_state_alloc call gives a reference, and that | |
542 | * is what we are dropping here. | |
543 | */ | |
5dba4797 | 544 | xfrm_state_put(x); |
26b15dad | 545 | err = 0; |
1da177e4 | 546 | } |
26b15dad JHS |
547 | |
548 | return err; | |
1da177e4 | 549 | } |
53bc6b4d | 550 | EXPORT_SYMBOL(__xfrm_state_delete); |
1da177e4 | 551 | |
26b15dad | 552 | int xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 553 | { |
26b15dad JHS |
554 | int err; |
555 | ||
1da177e4 | 556 | spin_lock_bh(&x->lock); |
26b15dad | 557 | err = __xfrm_state_delete(x); |
1da177e4 | 558 | spin_unlock_bh(&x->lock); |
26b15dad JHS |
559 | |
560 | return err; | |
1da177e4 LT |
561 | } |
562 | EXPORT_SYMBOL(xfrm_state_delete); | |
563 | ||
4aa2e62c JL |
564 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
565 | static inline int | |
2e71029e | 566 | xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid) |
1da177e4 | 567 | { |
4aa2e62c JL |
568 | int i, err = 0; |
569 | ||
0e602451 | 570 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
4aa2e62c JL |
571 | struct xfrm_state *x; |
572 | ||
b67bfe0d | 573 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
4aa2e62c JL |
574 | if (xfrm_id_proto_match(x->id.proto, proto) && |
575 | (err = security_xfrm_state_delete(x)) != 0) { | |
2e71029e | 576 | xfrm_audit_state_delete(x, 0, task_valid); |
4aa2e62c JL |
577 | return err; |
578 | } | |
579 | } | |
580 | } | |
581 | ||
582 | return err; | |
583 | } | |
584 | #else | |
585 | static inline int | |
2e71029e | 586 | xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid) |
4aa2e62c JL |
587 | { |
588 | return 0; | |
589 | } | |
590 | #endif | |
591 | ||
2e71029e | 592 | int xfrm_state_flush(struct net *net, u8 proto, bool task_valid) |
4aa2e62c | 593 | { |
9e64cc95 | 594 | int i, err = 0, cnt = 0; |
1da177e4 | 595 | |
283bc9f3 | 596 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
2e71029e | 597 | err = xfrm_state_flush_secctx_check(net, proto, task_valid); |
4aa2e62c JL |
598 | if (err) |
599 | goto out; | |
600 | ||
9e64cc95 | 601 | err = -ESRCH; |
0e602451 | 602 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
8f126e37 | 603 | struct xfrm_state *x; |
1da177e4 | 604 | restart: |
b67bfe0d | 605 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
1da177e4 | 606 | if (!xfrm_state_kern(x) && |
5794708f | 607 | xfrm_id_proto_match(x->id.proto, proto)) { |
1da177e4 | 608 | xfrm_state_hold(x); |
283bc9f3 | 609 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 610 | |
161a09e7 | 611 | err = xfrm_state_delete(x); |
ab5f5e8b | 612 | xfrm_audit_state_delete(x, err ? 0 : 1, |
2e71029e | 613 | task_valid); |
1da177e4 | 614 | xfrm_state_put(x); |
9e64cc95 JHS |
615 | if (!err) |
616 | cnt++; | |
1da177e4 | 617 | |
283bc9f3 | 618 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
619 | goto restart; |
620 | } | |
621 | } | |
622 | } | |
9e64cc95 JHS |
623 | if (cnt) |
624 | err = 0; | |
4aa2e62c JL |
625 | |
626 | out: | |
283bc9f3 | 627 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
4aa2e62c | 628 | return err; |
1da177e4 LT |
629 | } |
630 | EXPORT_SYMBOL(xfrm_state_flush); | |
631 | ||
e071041b | 632 | void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si) |
28d8909b | 633 | { |
283bc9f3 | 634 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
e071041b AD |
635 | si->sadcnt = net->xfrm.state_num; |
636 | si->sadhcnt = net->xfrm.state_hmask; | |
28d8909b | 637 | si->sadhmcnt = xfrm_state_hashmax; |
283bc9f3 | 638 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
28d8909b JHS |
639 | } |
640 | EXPORT_SYMBOL(xfrm_sad_getinfo); | |
641 | ||
1da177e4 | 642 | static int |
1a898592 | 643 | xfrm_init_tempstate(struct xfrm_state *x, const struct flowi *fl, |
04686013 | 644 | const struct xfrm_tmpl *tmpl, |
33765d06 | 645 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
8444cf71 | 646 | unsigned short family) |
1da177e4 LT |
647 | { |
648 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
649 | if (!afinfo) | |
650 | return -1; | |
8444cf71 TE |
651 | afinfo->init_tempsel(&x->sel, fl); |
652 | ||
653 | if (family != tmpl->encap_family) { | |
654 | xfrm_state_put_afinfo(afinfo); | |
655 | afinfo = xfrm_state_get_afinfo(tmpl->encap_family); | |
656 | if (!afinfo) | |
657 | return -1; | |
658 | } | |
659 | afinfo->init_temprop(x, tmpl, daddr, saddr); | |
1da177e4 LT |
660 | xfrm_state_put_afinfo(afinfo); |
661 | return 0; | |
662 | } | |
663 | ||
9aa60088 DM |
664 | static struct xfrm_state *__xfrm_state_lookup(struct net *net, u32 mark, |
665 | const xfrm_address_t *daddr, | |
666 | __be32 spi, u8 proto, | |
667 | unsigned short family) | |
edcd5821 | 668 | { |
221df1ed | 669 | unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family); |
edcd5821 DM |
670 | struct xfrm_state *x; |
671 | ||
ae3fb6d3 | 672 | hlist_for_each_entry_rcu(x, net->xfrm.state_byspi + h, byspi) { |
edcd5821 DM |
673 | if (x->props.family != family || |
674 | x->id.spi != spi || | |
1802571b | 675 | x->id.proto != proto || |
70e94e66 | 676 | !xfrm_addr_equal(&x->id.daddr, daddr, family)) |
edcd5821 DM |
677 | continue; |
678 | ||
3d6acfa7 JHS |
679 | if ((mark & x->mark.m) != x->mark.v) |
680 | continue; | |
02efdff7 FW |
681 | if (!xfrm_state_hold_rcu(x)) |
682 | continue; | |
edcd5821 DM |
683 | return x; |
684 | } | |
685 | ||
686 | return NULL; | |
687 | } | |
688 | ||
9aa60088 DM |
689 | static struct xfrm_state *__xfrm_state_lookup_byaddr(struct net *net, u32 mark, |
690 | const xfrm_address_t *daddr, | |
691 | const xfrm_address_t *saddr, | |
692 | u8 proto, unsigned short family) | |
edcd5821 | 693 | { |
221df1ed | 694 | unsigned int h = xfrm_src_hash(net, daddr, saddr, family); |
edcd5821 DM |
695 | struct xfrm_state *x; |
696 | ||
ae3fb6d3 | 697 | hlist_for_each_entry_rcu(x, net->xfrm.state_bysrc + h, bysrc) { |
edcd5821 | 698 | if (x->props.family != family || |
1802571b | 699 | x->id.proto != proto || |
70e94e66 YH |
700 | !xfrm_addr_equal(&x->id.daddr, daddr, family) || |
701 | !xfrm_addr_equal(&x->props.saddr, saddr, family)) | |
edcd5821 DM |
702 | continue; |
703 | ||
3d6acfa7 JHS |
704 | if ((mark & x->mark.m) != x->mark.v) |
705 | continue; | |
02efdff7 FW |
706 | if (!xfrm_state_hold_rcu(x)) |
707 | continue; | |
edcd5821 DM |
708 | return x; |
709 | } | |
710 | ||
711 | return NULL; | |
712 | } | |
713 | ||
714 | static inline struct xfrm_state * | |
715 | __xfrm_state_locate(struct xfrm_state *x, int use_spi, int family) | |
716 | { | |
221df1ed | 717 | struct net *net = xs_net(x); |
bd55775c | 718 | u32 mark = x->mark.v & x->mark.m; |
221df1ed | 719 | |
edcd5821 | 720 | if (use_spi) |
bd55775c JHS |
721 | return __xfrm_state_lookup(net, mark, &x->id.daddr, |
722 | x->id.spi, x->id.proto, family); | |
edcd5821 | 723 | else |
bd55775c JHS |
724 | return __xfrm_state_lookup_byaddr(net, mark, |
725 | &x->id.daddr, | |
edcd5821 DM |
726 | &x->props.saddr, |
727 | x->id.proto, family); | |
728 | } | |
729 | ||
98806f75 | 730 | static void xfrm_hash_grow_check(struct net *net, int have_hash_collision) |
2fab22f2 PM |
731 | { |
732 | if (have_hash_collision && | |
98806f75 AD |
733 | (net->xfrm.state_hmask + 1) < xfrm_state_hashmax && |
734 | net->xfrm.state_num > net->xfrm.state_hmask) | |
735 | schedule_work(&net->xfrm.state_hash_work); | |
2fab22f2 PM |
736 | } |
737 | ||
08ec9af1 | 738 | static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x, |
4a08ab0f | 739 | const struct flowi *fl, unsigned short family, |
08ec9af1 DM |
740 | struct xfrm_state **best, int *acq_in_progress, |
741 | int *error) | |
742 | { | |
743 | /* Resolution logic: | |
744 | * 1. There is a valid state with matching selector. Done. | |
745 | * 2. Valid state with inappropriate selector. Skip. | |
746 | * | |
747 | * Entering area of "sysdeps". | |
748 | * | |
749 | * 3. If state is not valid, selector is temporary, it selects | |
750 | * only session which triggered previous resolution. Key | |
751 | * manager will do something to install a state with proper | |
752 | * selector. | |
753 | */ | |
754 | if (x->km.state == XFRM_STATE_VALID) { | |
755 | if ((x->sel.family && | |
756 | !xfrm_selector_match(&x->sel, fl, x->sel.family)) || | |
757 | !security_xfrm_state_pol_flow_match(x, pol, fl)) | |
758 | return; | |
759 | ||
760 | if (!*best || | |
761 | (*best)->km.dying > x->km.dying || | |
762 | ((*best)->km.dying == x->km.dying && | |
763 | (*best)->curlft.add_time < x->curlft.add_time)) | |
764 | *best = x; | |
765 | } else if (x->km.state == XFRM_STATE_ACQ) { | |
766 | *acq_in_progress = 1; | |
767 | } else if (x->km.state == XFRM_STATE_ERROR || | |
768 | x->km.state == XFRM_STATE_EXPIRED) { | |
769 | if (xfrm_selector_match(&x->sel, fl, x->sel.family) && | |
770 | security_xfrm_state_pol_flow_match(x, pol, fl)) | |
771 | *error = -ESRCH; | |
772 | } | |
773 | } | |
774 | ||
1da177e4 | 775 | struct xfrm_state * |
33765d06 | 776 | xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
b520e9f6 | 777 | const struct flowi *fl, struct xfrm_tmpl *tmpl, |
1da177e4 LT |
778 | struct xfrm_policy *pol, int *err, |
779 | unsigned short family) | |
780 | { | |
08ec9af1 | 781 | static xfrm_address_t saddr_wildcard = { }; |
5447c5e4 | 782 | struct net *net = xp_net(pol); |
6a783c90 | 783 | unsigned int h, h_wildcard; |
37b08e34 | 784 | struct xfrm_state *x, *x0, *to_put; |
1da177e4 LT |
785 | int acquire_in_progress = 0; |
786 | int error = 0; | |
787 | struct xfrm_state *best = NULL; | |
bd55775c | 788 | u32 mark = pol->mark.v & pol->mark.m; |
8444cf71 | 789 | unsigned short encap_family = tmpl->encap_family; |
0f24558e | 790 | struct km_event c; |
a716c119 | 791 | |
37b08e34 DM |
792 | to_put = NULL; |
793 | ||
283bc9f3 | 794 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
8444cf71 | 795 | h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family); |
ae3fb6d3 | 796 | hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h, bydst) { |
8444cf71 | 797 | if (x->props.family == encap_family && |
1da177e4 | 798 | x->props.reqid == tmpl->reqid && |
3d6acfa7 | 799 | (mark & x->mark.m) == x->mark.v && |
fbd9a5b4 | 800 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
8444cf71 | 801 | xfrm_state_addr_check(x, daddr, saddr, encap_family) && |
1da177e4 LT |
802 | tmpl->mode == x->props.mode && |
803 | tmpl->id.proto == x->id.proto && | |
08ec9af1 | 804 | (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) |
1f673c5f | 805 | xfrm_state_look_at(pol, x, fl, encap_family, |
08ec9af1 DM |
806 | &best, &acquire_in_progress, &error); |
807 | } | |
6f115638 | 808 | if (best || acquire_in_progress) |
08ec9af1 DM |
809 | goto found; |
810 | ||
8444cf71 | 811 | h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, encap_family); |
ae3fb6d3 | 812 | hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h_wildcard, bydst) { |
8444cf71 | 813 | if (x->props.family == encap_family && |
08ec9af1 | 814 | x->props.reqid == tmpl->reqid && |
3d6acfa7 | 815 | (mark & x->mark.m) == x->mark.v && |
08ec9af1 | 816 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
f59bbdfa | 817 | xfrm_addr_equal(&x->id.daddr, daddr, encap_family) && |
08ec9af1 DM |
818 | tmpl->mode == x->props.mode && |
819 | tmpl->id.proto == x->id.proto && | |
820 | (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) | |
1f673c5f | 821 | xfrm_state_look_at(pol, x, fl, encap_family, |
08ec9af1 | 822 | &best, &acquire_in_progress, &error); |
1da177e4 LT |
823 | } |
824 | ||
08ec9af1 | 825 | found: |
1da177e4 LT |
826 | x = best; |
827 | if (!x && !error && !acquire_in_progress) { | |
5c5d281a | 828 | if (tmpl->id.spi && |
bd55775c | 829 | (x0 = __xfrm_state_lookup(net, mark, daddr, tmpl->id.spi, |
8444cf71 | 830 | tmpl->id.proto, encap_family)) != NULL) { |
37b08e34 | 831 | to_put = x0; |
1da177e4 LT |
832 | error = -EEXIST; |
833 | goto out; | |
834 | } | |
0f24558e HG |
835 | |
836 | c.net = net; | |
837 | /* If the KMs have no listeners (yet...), avoid allocating an SA | |
838 | * for each and every packet - garbage collection might not | |
839 | * handle the flood. | |
840 | */ | |
841 | if (!km_is_alive(&c)) { | |
842 | error = -ESRCH; | |
843 | goto out; | |
844 | } | |
845 | ||
5447c5e4 | 846 | x = xfrm_state_alloc(net); |
1da177e4 LT |
847 | if (x == NULL) { |
848 | error = -ENOMEM; | |
849 | goto out; | |
850 | } | |
8444cf71 | 851 | /* Initialize temporary state matching only |
1da177e4 | 852 | * to current session. */ |
8444cf71 | 853 | xfrm_init_tempstate(x, fl, tmpl, daddr, saddr, family); |
bd55775c | 854 | memcpy(&x->mark, &pol->mark, sizeof(x->mark)); |
1da177e4 | 855 | |
1d28f42c | 856 | error = security_xfrm_state_alloc_acquire(x, pol->security, fl->flowi_secid); |
e0d1caa7 VY |
857 | if (error) { |
858 | x->km.state = XFRM_STATE_DEAD; | |
37b08e34 | 859 | to_put = x; |
e0d1caa7 VY |
860 | x = NULL; |
861 | goto out; | |
862 | } | |
863 | ||
1da177e4 LT |
864 | if (km_query(x, tmpl, pol) == 0) { |
865 | x->km.state = XFRM_STATE_ACQ; | |
5447c5e4 | 866 | list_add(&x->km.all, &net->xfrm.state_all); |
ae3fb6d3 | 867 | hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h); |
8444cf71 | 868 | h = xfrm_src_hash(net, daddr, saddr, encap_family); |
ae3fb6d3 | 869 | hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h); |
1da177e4 | 870 | if (x->id.spi) { |
8444cf71 | 871 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, encap_family); |
ae3fb6d3 | 872 | hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h); |
1da177e4 | 873 | } |
b27aeadb | 874 | x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires; |
9e0d57fd | 875 | tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL); |
5447c5e4 AD |
876 | net->xfrm.state_num++; |
877 | xfrm_hash_grow_check(net, x->bydst.next != NULL); | |
1da177e4 LT |
878 | } else { |
879 | x->km.state = XFRM_STATE_DEAD; | |
37b08e34 | 880 | to_put = x; |
1da177e4 LT |
881 | x = NULL; |
882 | error = -ESRCH; | |
883 | } | |
884 | } | |
885 | out: | |
02efdff7 FW |
886 | if (x) { |
887 | if (!xfrm_state_hold_rcu(x)) { | |
888 | *err = -EAGAIN; | |
889 | x = NULL; | |
890 | } | |
891 | } else { | |
1da177e4 | 892 | *err = acquire_in_progress ? -EAGAIN : error; |
02efdff7 | 893 | } |
283bc9f3 | 894 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
37b08e34 DM |
895 | if (to_put) |
896 | xfrm_state_put(to_put); | |
1da177e4 LT |
897 | return x; |
898 | } | |
899 | ||
628529b6 | 900 | struct xfrm_state * |
bd55775c | 901 | xfrm_stateonly_find(struct net *net, u32 mark, |
5447c5e4 | 902 | xfrm_address_t *daddr, xfrm_address_t *saddr, |
628529b6 JHS |
903 | unsigned short family, u8 mode, u8 proto, u32 reqid) |
904 | { | |
4bda4f25 | 905 | unsigned int h; |
628529b6 | 906 | struct xfrm_state *rx = NULL, *x = NULL; |
628529b6 | 907 | |
4ae770bf | 908 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
5447c5e4 | 909 | h = xfrm_dst_hash(net, daddr, saddr, reqid, family); |
b67bfe0d | 910 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
628529b6 JHS |
911 | if (x->props.family == family && |
912 | x->props.reqid == reqid && | |
3d6acfa7 | 913 | (mark & x->mark.m) == x->mark.v && |
628529b6 JHS |
914 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
915 | xfrm_state_addr_check(x, daddr, saddr, family) && | |
916 | mode == x->props.mode && | |
917 | proto == x->id.proto && | |
918 | x->km.state == XFRM_STATE_VALID) { | |
919 | rx = x; | |
920 | break; | |
921 | } | |
922 | } | |
923 | ||
924 | if (rx) | |
925 | xfrm_state_hold(rx); | |
4ae770bf | 926 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
628529b6 JHS |
927 | |
928 | ||
929 | return rx; | |
930 | } | |
931 | EXPORT_SYMBOL(xfrm_stateonly_find); | |
932 | ||
c454997e FD |
933 | struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi, |
934 | unsigned short family) | |
935 | { | |
936 | struct xfrm_state *x; | |
937 | struct xfrm_state_walk *w; | |
938 | ||
939 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
940 | list_for_each_entry(w, &net->xfrm.state_all, all) { | |
941 | x = container_of(w, struct xfrm_state, km); | |
942 | if (x->props.family != family || | |
943 | x->id.spi != spi) | |
944 | continue; | |
945 | ||
c454997e | 946 | xfrm_state_hold(x); |
bdddbf69 | 947 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
c454997e FD |
948 | return x; |
949 | } | |
950 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); | |
951 | return NULL; | |
952 | } | |
953 | EXPORT_SYMBOL(xfrm_state_lookup_byspi); | |
954 | ||
1da177e4 LT |
955 | static void __xfrm_state_insert(struct xfrm_state *x) |
956 | { | |
98806f75 | 957 | struct net *net = xs_net(x); |
a624c108 | 958 | unsigned int h; |
1da177e4 | 959 | |
98806f75 | 960 | list_add(&x->km.all, &net->xfrm.state_all); |
4c563f76 | 961 | |
98806f75 | 962 | h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr, |
c1969f29 | 963 | x->props.reqid, x->props.family); |
ae3fb6d3 | 964 | hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h); |
1da177e4 | 965 | |
98806f75 | 966 | h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family); |
ae3fb6d3 | 967 | hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h); |
1da177e4 | 968 | |
7b4dc360 | 969 | if (x->id.spi) { |
98806f75 | 970 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, |
6c44e6b7 MN |
971 | x->props.family); |
972 | ||
ae3fb6d3 | 973 | hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h); |
6c44e6b7 MN |
974 | } |
975 | ||
9e0d57fd | 976 | tasklet_hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL); |
a47f0ce0 DM |
977 | if (x->replay_maxage) |
978 | mod_timer(&x->rtimer, jiffies + x->replay_maxage); | |
f8cd5488 | 979 | |
98806f75 | 980 | net->xfrm.state_num++; |
f034b5d4 | 981 | |
98806f75 | 982 | xfrm_hash_grow_check(net, x->bydst.next != NULL); |
1da177e4 LT |
983 | } |
984 | ||
283bc9f3 | 985 | /* net->xfrm.xfrm_state_lock is held */ |
c7f5ea3a DM |
986 | static void __xfrm_state_bump_genids(struct xfrm_state *xnew) |
987 | { | |
98806f75 | 988 | struct net *net = xs_net(xnew); |
c7f5ea3a DM |
989 | unsigned short family = xnew->props.family; |
990 | u32 reqid = xnew->props.reqid; | |
991 | struct xfrm_state *x; | |
c7f5ea3a | 992 | unsigned int h; |
3d6acfa7 | 993 | u32 mark = xnew->mark.v & xnew->mark.m; |
c7f5ea3a | 994 | |
98806f75 | 995 | h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family); |
b67bfe0d | 996 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
c7f5ea3a DM |
997 | if (x->props.family == family && |
998 | x->props.reqid == reqid && | |
3d6acfa7 | 999 | (mark & x->mark.m) == x->mark.v && |
70e94e66 YH |
1000 | xfrm_addr_equal(&x->id.daddr, &xnew->id.daddr, family) && |
1001 | xfrm_addr_equal(&x->props.saddr, &xnew->props.saddr, family)) | |
34996cb9 | 1002 | x->genid++; |
c7f5ea3a DM |
1003 | } |
1004 | } | |
1005 | ||
1da177e4 LT |
1006 | void xfrm_state_insert(struct xfrm_state *x) |
1007 | { | |
283bc9f3 FD |
1008 | struct net *net = xs_net(x); |
1009 | ||
1010 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
c7f5ea3a | 1011 | __xfrm_state_bump_genids(x); |
1da177e4 | 1012 | __xfrm_state_insert(x); |
283bc9f3 | 1013 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1014 | } |
1015 | EXPORT_SYMBOL(xfrm_state_insert); | |
1016 | ||
283bc9f3 | 1017 | /* net->xfrm.xfrm_state_lock is held */ |
e473fcb4 MK |
1018 | static struct xfrm_state *__find_acq_core(struct net *net, |
1019 | const struct xfrm_mark *m, | |
a70486f0 DM |
1020 | unsigned short family, u8 mode, |
1021 | u32 reqid, u8 proto, | |
1022 | const xfrm_address_t *daddr, | |
e473fcb4 MK |
1023 | const xfrm_address_t *saddr, |
1024 | int create) | |
2770834c | 1025 | { |
5447c5e4 | 1026 | unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family); |
2770834c | 1027 | struct xfrm_state *x; |
3d6acfa7 | 1028 | u32 mark = m->v & m->m; |
2770834c | 1029 | |
b67bfe0d | 1030 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
2770834c DM |
1031 | if (x->props.reqid != reqid || |
1032 | x->props.mode != mode || | |
1033 | x->props.family != family || | |
1034 | x->km.state != XFRM_STATE_ACQ || | |
75e252d9 | 1035 | x->id.spi != 0 || |
1802571b | 1036 | x->id.proto != proto || |
3d6acfa7 | 1037 | (mark & x->mark.m) != x->mark.v || |
70e94e66 YH |
1038 | !xfrm_addr_equal(&x->id.daddr, daddr, family) || |
1039 | !xfrm_addr_equal(&x->props.saddr, saddr, family)) | |
2770834c DM |
1040 | continue; |
1041 | ||
2770834c DM |
1042 | xfrm_state_hold(x); |
1043 | return x; | |
1044 | } | |
1045 | ||
1046 | if (!create) | |
1047 | return NULL; | |
1048 | ||
5447c5e4 | 1049 | x = xfrm_state_alloc(net); |
2770834c DM |
1050 | if (likely(x)) { |
1051 | switch (family) { | |
1052 | case AF_INET: | |
1053 | x->sel.daddr.a4 = daddr->a4; | |
1054 | x->sel.saddr.a4 = saddr->a4; | |
1055 | x->sel.prefixlen_d = 32; | |
1056 | x->sel.prefixlen_s = 32; | |
1057 | x->props.saddr.a4 = saddr->a4; | |
1058 | x->id.daddr.a4 = daddr->a4; | |
1059 | break; | |
1060 | ||
1061 | case AF_INET6: | |
15e318bd JB |
1062 | x->sel.daddr.in6 = daddr->in6; |
1063 | x->sel.saddr.in6 = saddr->in6; | |
2770834c DM |
1064 | x->sel.prefixlen_d = 128; |
1065 | x->sel.prefixlen_s = 128; | |
15e318bd JB |
1066 | x->props.saddr.in6 = saddr->in6; |
1067 | x->id.daddr.in6 = daddr->in6; | |
2770834c | 1068 | break; |
3ff50b79 | 1069 | } |
2770834c DM |
1070 | |
1071 | x->km.state = XFRM_STATE_ACQ; | |
1072 | x->id.proto = proto; | |
1073 | x->props.family = family; | |
1074 | x->props.mode = mode; | |
1075 | x->props.reqid = reqid; | |
bd55775c JHS |
1076 | x->mark.v = m->v; |
1077 | x->mark.m = m->m; | |
b27aeadb | 1078 | x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires; |
2770834c | 1079 | xfrm_state_hold(x); |
9e0d57fd | 1080 | tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL); |
5447c5e4 | 1081 | list_add(&x->km.all, &net->xfrm.state_all); |
ae3fb6d3 | 1082 | hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h); |
5447c5e4 | 1083 | h = xfrm_src_hash(net, daddr, saddr, family); |
ae3fb6d3 | 1084 | hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h); |
918049f0 | 1085 | |
5447c5e4 | 1086 | net->xfrm.state_num++; |
918049f0 | 1087 | |
5447c5e4 | 1088 | xfrm_hash_grow_check(net, x->bydst.next != NULL); |
2770834c DM |
1089 | } |
1090 | ||
1091 | return x; | |
1092 | } | |
1093 | ||
bd55775c | 1094 | static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); |
1da177e4 LT |
1095 | |
1096 | int xfrm_state_add(struct xfrm_state *x) | |
1097 | { | |
5447c5e4 | 1098 | struct net *net = xs_net(x); |
37b08e34 | 1099 | struct xfrm_state *x1, *to_put; |
1da177e4 LT |
1100 | int family; |
1101 | int err; | |
bd55775c | 1102 | u32 mark = x->mark.v & x->mark.m; |
eb2971b6 | 1103 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
1da177e4 LT |
1104 | |
1105 | family = x->props.family; | |
1da177e4 | 1106 | |
37b08e34 DM |
1107 | to_put = NULL; |
1108 | ||
283bc9f3 | 1109 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 1110 | |
edcd5821 | 1111 | x1 = __xfrm_state_locate(x, use_spi, family); |
1da177e4 | 1112 | if (x1) { |
37b08e34 | 1113 | to_put = x1; |
1da177e4 LT |
1114 | x1 = NULL; |
1115 | err = -EEXIST; | |
1116 | goto out; | |
1117 | } | |
1118 | ||
eb2971b6 | 1119 | if (use_spi && x->km.seq) { |
bd55775c | 1120 | x1 = __xfrm_find_acq_byseq(net, mark, x->km.seq); |
75e252d9 | 1121 | if (x1 && ((x1->id.proto != x->id.proto) || |
70e94e66 | 1122 | !xfrm_addr_equal(&x1->id.daddr, &x->id.daddr, family))) { |
37b08e34 | 1123 | to_put = x1; |
1da177e4 LT |
1124 | x1 = NULL; |
1125 | } | |
1126 | } | |
1127 | ||
eb2971b6 | 1128 | if (use_spi && !x1) |
bd55775c JHS |
1129 | x1 = __find_acq_core(net, &x->mark, family, x->props.mode, |
1130 | x->props.reqid, x->id.proto, | |
2770834c | 1131 | &x->id.daddr, &x->props.saddr, 0); |
1da177e4 | 1132 | |
c7f5ea3a | 1133 | __xfrm_state_bump_genids(x); |
1da177e4 LT |
1134 | __xfrm_state_insert(x); |
1135 | err = 0; | |
1136 | ||
1137 | out: | |
283bc9f3 | 1138 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1139 | |
1140 | if (x1) { | |
1141 | xfrm_state_delete(x1); | |
1142 | xfrm_state_put(x1); | |
1143 | } | |
1144 | ||
37b08e34 DM |
1145 | if (to_put) |
1146 | xfrm_state_put(to_put); | |
1147 | ||
1da177e4 LT |
1148 | return err; |
1149 | } | |
1150 | EXPORT_SYMBOL(xfrm_state_add); | |
1151 | ||
80c9abaa | 1152 | #ifdef CONFIG_XFRM_MIGRATE |
cc9ab60e | 1153 | static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig) |
80c9abaa | 1154 | { |
98806f75 | 1155 | struct net *net = xs_net(orig); |
98806f75 | 1156 | struct xfrm_state *x = xfrm_state_alloc(net); |
80c9abaa | 1157 | if (!x) |
553f9118 | 1158 | goto out; |
80c9abaa SS |
1159 | |
1160 | memcpy(&x->id, &orig->id, sizeof(x->id)); | |
1161 | memcpy(&x->sel, &orig->sel, sizeof(x->sel)); | |
1162 | memcpy(&x->lft, &orig->lft, sizeof(x->lft)); | |
1163 | x->props.mode = orig->props.mode; | |
1164 | x->props.replay_window = orig->props.replay_window; | |
1165 | x->props.reqid = orig->props.reqid; | |
1166 | x->props.family = orig->props.family; | |
1167 | x->props.saddr = orig->props.saddr; | |
1168 | ||
1169 | if (orig->aalg) { | |
4447bb33 | 1170 | x->aalg = xfrm_algo_auth_clone(orig->aalg); |
80c9abaa SS |
1171 | if (!x->aalg) |
1172 | goto error; | |
1173 | } | |
1174 | x->props.aalgo = orig->props.aalgo; | |
1175 | ||
ee5c2317 SK |
1176 | if (orig->aead) { |
1177 | x->aead = xfrm_algo_aead_clone(orig->aead); | |
1178 | if (!x->aead) | |
1179 | goto error; | |
1180 | } | |
80c9abaa SS |
1181 | if (orig->ealg) { |
1182 | x->ealg = xfrm_algo_clone(orig->ealg); | |
1183 | if (!x->ealg) | |
1184 | goto error; | |
1185 | } | |
1186 | x->props.ealgo = orig->props.ealgo; | |
1187 | ||
1188 | if (orig->calg) { | |
1189 | x->calg = xfrm_algo_clone(orig->calg); | |
1190 | if (!x->calg) | |
1191 | goto error; | |
1192 | } | |
1193 | x->props.calgo = orig->props.calgo; | |
1194 | ||
a716c119 | 1195 | if (orig->encap) { |
80c9abaa SS |
1196 | x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL); |
1197 | if (!x->encap) | |
1198 | goto error; | |
1199 | } | |
1200 | ||
1201 | if (orig->coaddr) { | |
1202 | x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr), | |
1203 | GFP_KERNEL); | |
1204 | if (!x->coaddr) | |
1205 | goto error; | |
1206 | } | |
1207 | ||
af2f464e | 1208 | if (orig->replay_esn) { |
cc9ab60e | 1209 | if (xfrm_replay_clone(x, orig)) |
af2f464e SK |
1210 | goto error; |
1211 | } | |
1212 | ||
bd55775c JHS |
1213 | memcpy(&x->mark, &orig->mark, sizeof(x->mark)); |
1214 | ||
cc9ab60e | 1215 | if (xfrm_init_state(x) < 0) |
80c9abaa SS |
1216 | goto error; |
1217 | ||
1218 | x->props.flags = orig->props.flags; | |
a947b0a9 | 1219 | x->props.extra_flags = orig->props.extra_flags; |
80c9abaa | 1220 | |
ee5c2317 SK |
1221 | x->tfcpad = orig->tfcpad; |
1222 | x->replay_maxdiff = orig->replay_maxdiff; | |
1223 | x->replay_maxage = orig->replay_maxage; | |
80c9abaa SS |
1224 | x->curlft.add_time = orig->curlft.add_time; |
1225 | x->km.state = orig->km.state; | |
1226 | x->km.seq = orig->km.seq; | |
1227 | ||
1228 | return x; | |
1229 | ||
1230 | error: | |
553f9118 HX |
1231 | xfrm_state_put(x); |
1232 | out: | |
80c9abaa SS |
1233 | return NULL; |
1234 | } | |
80c9abaa | 1235 | |
283bc9f3 | 1236 | struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net) |
80c9abaa SS |
1237 | { |
1238 | unsigned int h; | |
8c0cba22 SK |
1239 | struct xfrm_state *x = NULL; |
1240 | ||
1241 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
80c9abaa SS |
1242 | |
1243 | if (m->reqid) { | |
283bc9f3 | 1244 | h = xfrm_dst_hash(net, &m->old_daddr, &m->old_saddr, |
80c9abaa | 1245 | m->reqid, m->old_family); |
283bc9f3 | 1246 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
80c9abaa SS |
1247 | if (x->props.mode != m->mode || |
1248 | x->id.proto != m->proto) | |
1249 | continue; | |
1250 | if (m->reqid && x->props.reqid != m->reqid) | |
1251 | continue; | |
70e94e66 YH |
1252 | if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr, |
1253 | m->old_family) || | |
1254 | !xfrm_addr_equal(&x->props.saddr, &m->old_saddr, | |
1255 | m->old_family)) | |
80c9abaa SS |
1256 | continue; |
1257 | xfrm_state_hold(x); | |
8c0cba22 | 1258 | break; |
80c9abaa SS |
1259 | } |
1260 | } else { | |
283bc9f3 | 1261 | h = xfrm_src_hash(net, &m->old_daddr, &m->old_saddr, |
80c9abaa | 1262 | m->old_family); |
283bc9f3 | 1263 | hlist_for_each_entry(x, net->xfrm.state_bysrc+h, bysrc) { |
80c9abaa SS |
1264 | if (x->props.mode != m->mode || |
1265 | x->id.proto != m->proto) | |
1266 | continue; | |
70e94e66 YH |
1267 | if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr, |
1268 | m->old_family) || | |
1269 | !xfrm_addr_equal(&x->props.saddr, &m->old_saddr, | |
1270 | m->old_family)) | |
80c9abaa SS |
1271 | continue; |
1272 | xfrm_state_hold(x); | |
8c0cba22 | 1273 | break; |
80c9abaa SS |
1274 | } |
1275 | } | |
1276 | ||
8c0cba22 SK |
1277 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1278 | ||
1279 | return x; | |
80c9abaa SS |
1280 | } |
1281 | EXPORT_SYMBOL(xfrm_migrate_state_find); | |
1282 | ||
3e94c2dc WC |
1283 | struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, |
1284 | struct xfrm_migrate *m) | |
80c9abaa SS |
1285 | { |
1286 | struct xfrm_state *xc; | |
80c9abaa | 1287 | |
cc9ab60e | 1288 | xc = xfrm_state_clone(x); |
80c9abaa SS |
1289 | if (!xc) |
1290 | return NULL; | |
1291 | ||
1292 | memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr)); | |
1293 | memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr)); | |
1294 | ||
1295 | /* add state */ | |
70e94e66 | 1296 | if (xfrm_addr_equal(&x->id.daddr, &m->new_daddr, m->new_family)) { |
80c9abaa SS |
1297 | /* a care is needed when the destination address of the |
1298 | state is to be updated as it is a part of triplet */ | |
1299 | xfrm_state_insert(xc); | |
1300 | } else { | |
cc9ab60e | 1301 | if (xfrm_state_add(xc) < 0) |
80c9abaa SS |
1302 | goto error; |
1303 | } | |
1304 | ||
1305 | return xc; | |
1306 | error: | |
78347c8c | 1307 | xfrm_state_put(xc); |
80c9abaa SS |
1308 | return NULL; |
1309 | } | |
1310 | EXPORT_SYMBOL(xfrm_state_migrate); | |
1311 | #endif | |
1312 | ||
1da177e4 LT |
1313 | int xfrm_state_update(struct xfrm_state *x) |
1314 | { | |
37b08e34 | 1315 | struct xfrm_state *x1, *to_put; |
1da177e4 | 1316 | int err; |
eb2971b6 | 1317 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
283bc9f3 | 1318 | struct net *net = xs_net(x); |
1da177e4 | 1319 | |
37b08e34 DM |
1320 | to_put = NULL; |
1321 | ||
283bc9f3 | 1322 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
edcd5821 | 1323 | x1 = __xfrm_state_locate(x, use_spi, x->props.family); |
1da177e4 LT |
1324 | |
1325 | err = -ESRCH; | |
1326 | if (!x1) | |
1327 | goto out; | |
1328 | ||
1329 | if (xfrm_state_kern(x1)) { | |
37b08e34 | 1330 | to_put = x1; |
1da177e4 LT |
1331 | err = -EEXIST; |
1332 | goto out; | |
1333 | } | |
1334 | ||
1335 | if (x1->km.state == XFRM_STATE_ACQ) { | |
1336 | __xfrm_state_insert(x); | |
1337 | x = NULL; | |
1338 | } | |
1339 | err = 0; | |
1340 | ||
1341 | out: | |
283bc9f3 | 1342 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 1343 | |
37b08e34 DM |
1344 | if (to_put) |
1345 | xfrm_state_put(to_put); | |
1346 | ||
1da177e4 LT |
1347 | if (err) |
1348 | return err; | |
1349 | ||
1350 | if (!x) { | |
1351 | xfrm_state_delete(x1); | |
1352 | xfrm_state_put(x1); | |
1353 | return 0; | |
1354 | } | |
1355 | ||
1356 | err = -EINVAL; | |
1357 | spin_lock_bh(&x1->lock); | |
1358 | if (likely(x1->km.state == XFRM_STATE_VALID)) { | |
1359 | if (x->encap && x1->encap) | |
1360 | memcpy(x1->encap, x->encap, sizeof(*x1->encap)); | |
060f02a3 NT |
1361 | if (x->coaddr && x1->coaddr) { |
1362 | memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr)); | |
1363 | } | |
1364 | if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel))) | |
1365 | memcpy(&x1->sel, &x->sel, sizeof(x1->sel)); | |
1da177e4 LT |
1366 | memcpy(&x1->lft, &x->lft, sizeof(x1->lft)); |
1367 | x1->km.dying = 0; | |
1368 | ||
9e0d57fd | 1369 | tasklet_hrtimer_start(&x1->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL); |
1da177e4 LT |
1370 | if (x1->curlft.use_time) |
1371 | xfrm_state_check_expire(x1); | |
1372 | ||
1373 | err = 0; | |
8fcbc637 TG |
1374 | x->km.state = XFRM_STATE_DEAD; |
1375 | __xfrm_state_put(x); | |
1da177e4 LT |
1376 | } |
1377 | spin_unlock_bh(&x1->lock); | |
1378 | ||
1379 | xfrm_state_put(x1); | |
1380 | ||
1381 | return err; | |
1382 | } | |
1383 | EXPORT_SYMBOL(xfrm_state_update); | |
1384 | ||
1385 | int xfrm_state_check_expire(struct xfrm_state *x) | |
1386 | { | |
1387 | if (!x->curlft.use_time) | |
9d729f72 | 1388 | x->curlft.use_time = get_seconds(); |
1da177e4 | 1389 | |
1da177e4 LT |
1390 | if (x->curlft.bytes >= x->lft.hard_byte_limit || |
1391 | x->curlft.packets >= x->lft.hard_packet_limit) { | |
4666faab | 1392 | x->km.state = XFRM_STATE_EXPIRED; |
9b7a787d | 1393 | tasklet_hrtimer_start(&x->mtimer, ktime_set(0, 0), HRTIMER_MODE_REL); |
1da177e4 LT |
1394 | return -EINVAL; |
1395 | } | |
1396 | ||
1397 | if (!x->km.dying && | |
1398 | (x->curlft.bytes >= x->lft.soft_byte_limit || | |
4666faab HX |
1399 | x->curlft.packets >= x->lft.soft_packet_limit)) { |
1400 | x->km.dying = 1; | |
53bc6b4d | 1401 | km_state_expired(x, 0, 0); |
4666faab | 1402 | } |
1da177e4 LT |
1403 | return 0; |
1404 | } | |
1405 | EXPORT_SYMBOL(xfrm_state_check_expire); | |
1406 | ||
1da177e4 | 1407 | struct xfrm_state * |
a70486f0 | 1408 | xfrm_state_lookup(struct net *net, u32 mark, const xfrm_address_t *daddr, __be32 spi, |
bd55775c | 1409 | u8 proto, unsigned short family) |
1da177e4 LT |
1410 | { |
1411 | struct xfrm_state *x; | |
1da177e4 | 1412 | |
283bc9f3 | 1413 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1414 | x = __xfrm_state_lookup(net, mark, daddr, spi, proto, family); |
283bc9f3 | 1415 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1416 | return x; |
1417 | } | |
1418 | EXPORT_SYMBOL(xfrm_state_lookup); | |
1419 | ||
1420 | struct xfrm_state * | |
bd55775c | 1421 | xfrm_state_lookup_byaddr(struct net *net, u32 mark, |
a70486f0 | 1422 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
eb2971b6 MN |
1423 | u8 proto, unsigned short family) |
1424 | { | |
1425 | struct xfrm_state *x; | |
eb2971b6 | 1426 | |
283bc9f3 | 1427 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1428 | x = __xfrm_state_lookup_byaddr(net, mark, daddr, saddr, proto, family); |
283bc9f3 | 1429 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
eb2971b6 MN |
1430 | return x; |
1431 | } | |
1432 | EXPORT_SYMBOL(xfrm_state_lookup_byaddr); | |
1433 | ||
1434 | struct xfrm_state * | |
e473fcb4 MK |
1435 | xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, u8 mode, u32 reqid, |
1436 | u8 proto, const xfrm_address_t *daddr, | |
1437 | const xfrm_address_t *saddr, int create, unsigned short family) | |
1da177e4 LT |
1438 | { |
1439 | struct xfrm_state *x; | |
1da177e4 | 1440 | |
283bc9f3 | 1441 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1442 | x = __find_acq_core(net, mark, family, mode, reqid, proto, daddr, saddr, create); |
283bc9f3 | 1443 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
2770834c | 1444 | |
1da177e4 LT |
1445 | return x; |
1446 | } | |
1447 | EXPORT_SYMBOL(xfrm_find_acq); | |
1448 | ||
41a49cc3 MN |
1449 | #ifdef CONFIG_XFRM_SUB_POLICY |
1450 | int | |
1451 | xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, | |
283bc9f3 | 1452 | unsigned short family, struct net *net) |
41a49cc3 MN |
1453 | { |
1454 | int err = 0; | |
1455 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
1456 | if (!afinfo) | |
1457 | return -EAFNOSUPPORT; | |
1458 | ||
283bc9f3 | 1459 | spin_lock_bh(&net->xfrm.xfrm_state_lock); /*FIXME*/ |
41a49cc3 MN |
1460 | if (afinfo->tmpl_sort) |
1461 | err = afinfo->tmpl_sort(dst, src, n); | |
283bc9f3 | 1462 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
41a49cc3 MN |
1463 | xfrm_state_put_afinfo(afinfo); |
1464 | return err; | |
1465 | } | |
1466 | EXPORT_SYMBOL(xfrm_tmpl_sort); | |
1467 | ||
1468 | int | |
1469 | xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, | |
1470 | unsigned short family) | |
1471 | { | |
1472 | int err = 0; | |
1473 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
35ea790d | 1474 | struct net *net = xs_net(*src); |
283bc9f3 | 1475 | |
41a49cc3 MN |
1476 | if (!afinfo) |
1477 | return -EAFNOSUPPORT; | |
1478 | ||
283bc9f3 | 1479 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
41a49cc3 MN |
1480 | if (afinfo->state_sort) |
1481 | err = afinfo->state_sort(dst, src, n); | |
283bc9f3 | 1482 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
41a49cc3 MN |
1483 | xfrm_state_put_afinfo(afinfo); |
1484 | return err; | |
1485 | } | |
1486 | EXPORT_SYMBOL(xfrm_state_sort); | |
1487 | #endif | |
1488 | ||
1da177e4 LT |
1489 | /* Silly enough, but I'm lazy to build resolution list */ |
1490 | ||
bd55775c | 1491 | static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq) |
1da177e4 LT |
1492 | { |
1493 | int i; | |
1da177e4 | 1494 | |
5447c5e4 | 1495 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
8f126e37 DM |
1496 | struct xfrm_state *x; |
1497 | ||
b67bfe0d | 1498 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
8f126e37 | 1499 | if (x->km.seq == seq && |
3d6acfa7 | 1500 | (mark & x->mark.m) == x->mark.v && |
8f126e37 | 1501 | x->km.state == XFRM_STATE_ACQ) { |
1da177e4 LT |
1502 | xfrm_state_hold(x); |
1503 | return x; | |
1504 | } | |
1505 | } | |
1506 | } | |
1507 | return NULL; | |
1508 | } | |
1509 | ||
bd55775c | 1510 | struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq) |
1da177e4 LT |
1511 | { |
1512 | struct xfrm_state *x; | |
1513 | ||
283bc9f3 | 1514 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1515 | x = __xfrm_find_acq_byseq(net, mark, seq); |
283bc9f3 | 1516 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1517 | return x; |
1518 | } | |
1519 | EXPORT_SYMBOL(xfrm_find_acq_byseq); | |
1520 | ||
1521 | u32 xfrm_get_acqseq(void) | |
1522 | { | |
1523 | u32 res; | |
6836b9bd | 1524 | static atomic_t acqseq; |
1525 | ||
1526 | do { | |
1527 | res = atomic_inc_return(&acqseq); | |
1528 | } while (!res); | |
1da177e4 | 1529 | |
1da177e4 LT |
1530 | return res; |
1531 | } | |
1532 | EXPORT_SYMBOL(xfrm_get_acqseq); | |
1533 | ||
776e9dd9 FD |
1534 | int verify_spi_info(u8 proto, u32 min, u32 max) |
1535 | { | |
1536 | switch (proto) { | |
1537 | case IPPROTO_AH: | |
1538 | case IPPROTO_ESP: | |
1539 | break; | |
1540 | ||
1541 | case IPPROTO_COMP: | |
1542 | /* IPCOMP spi is 16-bits. */ | |
1543 | if (max >= 0x10000) | |
1544 | return -EINVAL; | |
1545 | break; | |
1546 | ||
1547 | default: | |
1548 | return -EINVAL; | |
1549 | } | |
1550 | ||
1551 | if (min > max) | |
1552 | return -EINVAL; | |
1553 | ||
1554 | return 0; | |
1555 | } | |
1556 | EXPORT_SYMBOL(verify_spi_info); | |
1557 | ||
658b219e | 1558 | int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high) |
1da177e4 | 1559 | { |
221df1ed | 1560 | struct net *net = xs_net(x); |
f034b5d4 | 1561 | unsigned int h; |
1da177e4 | 1562 | struct xfrm_state *x0; |
658b219e HX |
1563 | int err = -ENOENT; |
1564 | __be32 minspi = htonl(low); | |
1565 | __be32 maxspi = htonl(high); | |
bd55775c | 1566 | u32 mark = x->mark.v & x->mark.m; |
1da177e4 | 1567 | |
658b219e HX |
1568 | spin_lock_bh(&x->lock); |
1569 | if (x->km.state == XFRM_STATE_DEAD) | |
1570 | goto unlock; | |
1571 | ||
1572 | err = 0; | |
1da177e4 | 1573 | if (x->id.spi) |
658b219e HX |
1574 | goto unlock; |
1575 | ||
1576 | err = -ENOENT; | |
1da177e4 LT |
1577 | |
1578 | if (minspi == maxspi) { | |
bd55775c | 1579 | x0 = xfrm_state_lookup(net, mark, &x->id.daddr, minspi, x->id.proto, x->props.family); |
1da177e4 LT |
1580 | if (x0) { |
1581 | xfrm_state_put(x0); | |
658b219e | 1582 | goto unlock; |
1da177e4 LT |
1583 | } |
1584 | x->id.spi = minspi; | |
1585 | } else { | |
1586 | u32 spi = 0; | |
9b7a787d | 1587 | for (h = 0; h < high-low+1; h++) { |
63862b5b | 1588 | spi = low + prandom_u32()%(high-low+1); |
bd55775c | 1589 | x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family); |
1da177e4 LT |
1590 | if (x0 == NULL) { |
1591 | x->id.spi = htonl(spi); | |
1592 | break; | |
1593 | } | |
1594 | xfrm_state_put(x0); | |
1595 | } | |
1596 | } | |
1597 | if (x->id.spi) { | |
283bc9f3 | 1598 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12604d8a | 1599 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family); |
ae3fb6d3 | 1600 | hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h); |
283bc9f3 | 1601 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
658b219e HX |
1602 | |
1603 | err = 0; | |
1da177e4 | 1604 | } |
658b219e HX |
1605 | |
1606 | unlock: | |
1607 | spin_unlock_bh(&x->lock); | |
1608 | ||
1609 | return err; | |
1da177e4 LT |
1610 | } |
1611 | EXPORT_SYMBOL(xfrm_alloc_spi); | |
1612 | ||
d3623099 | 1613 | static bool __xfrm_state_filter_match(struct xfrm_state *x, |
870a2df4 | 1614 | struct xfrm_address_filter *filter) |
d3623099 ND |
1615 | { |
1616 | if (filter) { | |
1617 | if ((filter->family == AF_INET || | |
1618 | filter->family == AF_INET6) && | |
1619 | x->props.family != filter->family) | |
1620 | return false; | |
1621 | ||
1622 | return addr_match(&x->props.saddr, &filter->saddr, | |
1623 | filter->splen) && | |
1624 | addr_match(&x->id.daddr, &filter->daddr, | |
1625 | filter->dplen); | |
1626 | } | |
1627 | return true; | |
1628 | } | |
1629 | ||
284fa7da | 1630 | int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, |
4c563f76 | 1631 | int (*func)(struct xfrm_state *, int, void*), |
1da177e4 LT |
1632 | void *data) |
1633 | { | |
12a169e7 HX |
1634 | struct xfrm_state *state; |
1635 | struct xfrm_state_walk *x; | |
1da177e4 LT |
1636 | int err = 0; |
1637 | ||
12a169e7 | 1638 | if (walk->seq != 0 && list_empty(&walk->all)) |
4c563f76 TT |
1639 | return 0; |
1640 | ||
283bc9f3 | 1641 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12a169e7 | 1642 | if (list_empty(&walk->all)) |
284fa7da | 1643 | x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all); |
12a169e7 | 1644 | else |
80077702 | 1645 | x = list_first_entry(&walk->all, struct xfrm_state_walk, all); |
284fa7da | 1646 | list_for_each_entry_from(x, &net->xfrm.state_all, all) { |
12a169e7 | 1647 | if (x->state == XFRM_STATE_DEAD) |
4c563f76 | 1648 | continue; |
12a169e7 HX |
1649 | state = container_of(x, struct xfrm_state, km); |
1650 | if (!xfrm_id_proto_match(state->id.proto, walk->proto)) | |
4c563f76 | 1651 | continue; |
d3623099 ND |
1652 | if (!__xfrm_state_filter_match(state, walk->filter)) |
1653 | continue; | |
12a169e7 HX |
1654 | err = func(state, walk->seq, data); |
1655 | if (err) { | |
1656 | list_move_tail(&walk->all, &x->all); | |
1657 | goto out; | |
1da177e4 | 1658 | } |
12a169e7 | 1659 | walk->seq++; |
1da177e4 | 1660 | } |
12a169e7 | 1661 | if (walk->seq == 0) { |
1da177e4 LT |
1662 | err = -ENOENT; |
1663 | goto out; | |
1664 | } | |
12a169e7 | 1665 | list_del_init(&walk->all); |
1da177e4 | 1666 | out: |
283bc9f3 | 1667 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1668 | return err; |
1669 | } | |
1670 | EXPORT_SYMBOL(xfrm_state_walk); | |
1671 | ||
d3623099 | 1672 | void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto, |
870a2df4 | 1673 | struct xfrm_address_filter *filter) |
5c182458 | 1674 | { |
12a169e7 | 1675 | INIT_LIST_HEAD(&walk->all); |
5c182458 | 1676 | walk->proto = proto; |
12a169e7 HX |
1677 | walk->state = XFRM_STATE_DEAD; |
1678 | walk->seq = 0; | |
d3623099 | 1679 | walk->filter = filter; |
5c182458 HX |
1680 | } |
1681 | EXPORT_SYMBOL(xfrm_state_walk_init); | |
1682 | ||
283bc9f3 | 1683 | void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net) |
abb81c4f | 1684 | { |
d3623099 ND |
1685 | kfree(walk->filter); |
1686 | ||
12a169e7 | 1687 | if (list_empty(&walk->all)) |
5c182458 | 1688 | return; |
5c182458 | 1689 | |
283bc9f3 | 1690 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12a169e7 | 1691 | list_del(&walk->all); |
283bc9f3 | 1692 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
abb81c4f HX |
1693 | } |
1694 | EXPORT_SYMBOL(xfrm_state_walk_done); | |
1695 | ||
f8cd5488 JHS |
1696 | static void xfrm_replay_timer_handler(unsigned long data) |
1697 | { | |
3e94c2dc | 1698 | struct xfrm_state *x = (struct xfrm_state *)data; |
f8cd5488 JHS |
1699 | |
1700 | spin_lock(&x->lock); | |
1701 | ||
2717096a | 1702 | if (x->km.state == XFRM_STATE_VALID) { |
a6483b79 | 1703 | if (xfrm_aevent_is_on(xs_net(x))) |
9fdc4883 | 1704 | x->repl->notify(x, XFRM_REPLAY_TIMEOUT); |
2717096a JHS |
1705 | else |
1706 | x->xflags |= XFRM_TIME_DEFER; | |
1707 | } | |
f8cd5488 JHS |
1708 | |
1709 | spin_unlock(&x->lock); | |
1710 | } | |
1711 | ||
df01812e | 1712 | static LIST_HEAD(xfrm_km_list); |
1da177e4 | 1713 | |
214e005b | 1714 | void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
1da177e4 LT |
1715 | { |
1716 | struct xfrm_mgr *km; | |
1717 | ||
85168c00 CW |
1718 | rcu_read_lock(); |
1719 | list_for_each_entry_rcu(km, &xfrm_km_list, list) | |
26b15dad JHS |
1720 | if (km->notify_policy) |
1721 | km->notify_policy(xp, dir, c); | |
85168c00 | 1722 | rcu_read_unlock(); |
26b15dad | 1723 | } |
1da177e4 | 1724 | |
214e005b | 1725 | void km_state_notify(struct xfrm_state *x, const struct km_event *c) |
26b15dad JHS |
1726 | { |
1727 | struct xfrm_mgr *km; | |
85168c00 CW |
1728 | rcu_read_lock(); |
1729 | list_for_each_entry_rcu(km, &xfrm_km_list, list) | |
26b15dad JHS |
1730 | if (km->notify) |
1731 | km->notify(x, c); | |
85168c00 | 1732 | rcu_read_unlock(); |
26b15dad JHS |
1733 | } |
1734 | ||
1735 | EXPORT_SYMBOL(km_policy_notify); | |
1736 | EXPORT_SYMBOL(km_state_notify); | |
1737 | ||
15e47304 | 1738 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid) |
26b15dad JHS |
1739 | { |
1740 | struct km_event c; | |
1741 | ||
bf08867f | 1742 | c.data.hard = hard; |
15e47304 | 1743 | c.portid = portid; |
f60f6b8f | 1744 | c.event = XFRM_MSG_EXPIRE; |
26b15dad | 1745 | km_state_notify(x, &c); |
1da177e4 LT |
1746 | } |
1747 | ||
53bc6b4d | 1748 | EXPORT_SYMBOL(km_state_expired); |
26b15dad JHS |
1749 | /* |
1750 | * We send to all registered managers regardless of failure | |
1751 | * We are happy with one success | |
1752 | */ | |
980ebd25 | 1753 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol) |
1da177e4 | 1754 | { |
26b15dad | 1755 | int err = -EINVAL, acqret; |
1da177e4 LT |
1756 | struct xfrm_mgr *km; |
1757 | ||
85168c00 CW |
1758 | rcu_read_lock(); |
1759 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
65e0736b | 1760 | acqret = km->acquire(x, t, pol); |
26b15dad JHS |
1761 | if (!acqret) |
1762 | err = acqret; | |
1da177e4 | 1763 | } |
85168c00 | 1764 | rcu_read_unlock(); |
1da177e4 LT |
1765 | return err; |
1766 | } | |
980ebd25 | 1767 | EXPORT_SYMBOL(km_query); |
1da177e4 | 1768 | |
5d36b180 | 1769 | int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) |
1da177e4 LT |
1770 | { |
1771 | int err = -EINVAL; | |
1772 | struct xfrm_mgr *km; | |
1773 | ||
85168c00 CW |
1774 | rcu_read_lock(); |
1775 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
1da177e4 LT |
1776 | if (km->new_mapping) |
1777 | err = km->new_mapping(x, ipaddr, sport); | |
1778 | if (!err) | |
1779 | break; | |
1780 | } | |
85168c00 | 1781 | rcu_read_unlock(); |
1da177e4 LT |
1782 | return err; |
1783 | } | |
1784 | EXPORT_SYMBOL(km_new_mapping); | |
1785 | ||
15e47304 | 1786 | void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid) |
1da177e4 | 1787 | { |
26b15dad | 1788 | struct km_event c; |
1da177e4 | 1789 | |
bf08867f | 1790 | c.data.hard = hard; |
15e47304 | 1791 | c.portid = portid; |
f60f6b8f | 1792 | c.event = XFRM_MSG_POLEXPIRE; |
26b15dad | 1793 | km_policy_notify(pol, dir, &c); |
1da177e4 | 1794 | } |
a70fcb0b | 1795 | EXPORT_SYMBOL(km_policy_expired); |
1da177e4 | 1796 | |
2d60abc2 | 1797 | #ifdef CONFIG_XFRM_MIGRATE |
183cad12 DM |
1798 | int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1799 | const struct xfrm_migrate *m, int num_migrate, | |
1800 | const struct xfrm_kmaddress *k) | |
80c9abaa SS |
1801 | { |
1802 | int err = -EINVAL; | |
1803 | int ret; | |
1804 | struct xfrm_mgr *km; | |
1805 | ||
85168c00 CW |
1806 | rcu_read_lock(); |
1807 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
80c9abaa | 1808 | if (km->migrate) { |
13c1d189 | 1809 | ret = km->migrate(sel, dir, type, m, num_migrate, k); |
80c9abaa SS |
1810 | if (!ret) |
1811 | err = ret; | |
1812 | } | |
1813 | } | |
85168c00 | 1814 | rcu_read_unlock(); |
80c9abaa SS |
1815 | return err; |
1816 | } | |
1817 | EXPORT_SYMBOL(km_migrate); | |
2d60abc2 | 1818 | #endif |
80c9abaa | 1819 | |
db983c11 | 1820 | int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr) |
97a64b45 MN |
1821 | { |
1822 | int err = -EINVAL; | |
1823 | int ret; | |
1824 | struct xfrm_mgr *km; | |
1825 | ||
85168c00 CW |
1826 | rcu_read_lock(); |
1827 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
97a64b45 | 1828 | if (km->report) { |
db983c11 | 1829 | ret = km->report(net, proto, sel, addr); |
97a64b45 MN |
1830 | if (!ret) |
1831 | err = ret; | |
1832 | } | |
1833 | } | |
85168c00 | 1834 | rcu_read_unlock(); |
97a64b45 MN |
1835 | return err; |
1836 | } | |
1837 | EXPORT_SYMBOL(km_report); | |
1838 | ||
0f24558e HG |
1839 | bool km_is_alive(const struct km_event *c) |
1840 | { | |
1841 | struct xfrm_mgr *km; | |
1842 | bool is_alive = false; | |
1843 | ||
1844 | rcu_read_lock(); | |
1845 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
1846 | if (km->is_alive && km->is_alive(c)) { | |
1847 | is_alive = true; | |
1848 | break; | |
1849 | } | |
1850 | } | |
1851 | rcu_read_unlock(); | |
1852 | ||
1853 | return is_alive; | |
1854 | } | |
1855 | EXPORT_SYMBOL(km_is_alive); | |
1856 | ||
1da177e4 LT |
1857 | int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) |
1858 | { | |
1859 | int err; | |
1860 | u8 *data; | |
1861 | struct xfrm_mgr *km; | |
1862 | struct xfrm_policy *pol = NULL; | |
1863 | ||
1864 | if (optlen <= 0 || optlen > PAGE_SIZE) | |
1865 | return -EMSGSIZE; | |
1866 | ||
1867 | data = kmalloc(optlen, GFP_KERNEL); | |
1868 | if (!data) | |
1869 | return -ENOMEM; | |
1870 | ||
1871 | err = -EFAULT; | |
1872 | if (copy_from_user(data, optval, optlen)) | |
1873 | goto out; | |
1874 | ||
1875 | err = -EINVAL; | |
85168c00 CW |
1876 | rcu_read_lock(); |
1877 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
cb969f07 | 1878 | pol = km->compile_policy(sk, optname, data, |
1da177e4 LT |
1879 | optlen, &err); |
1880 | if (err >= 0) | |
1881 | break; | |
1882 | } | |
85168c00 | 1883 | rcu_read_unlock(); |
1da177e4 LT |
1884 | |
1885 | if (err >= 0) { | |
1886 | xfrm_sk_policy_insert(sk, err, pol); | |
1887 | xfrm_pol_put(pol); | |
1888 | err = 0; | |
1889 | } | |
1890 | ||
1891 | out: | |
1892 | kfree(data); | |
1893 | return err; | |
1894 | } | |
1895 | EXPORT_SYMBOL(xfrm_user_policy); | |
1896 | ||
85168c00 CW |
1897 | static DEFINE_SPINLOCK(xfrm_km_lock); |
1898 | ||
1da177e4 LT |
1899 | int xfrm_register_km(struct xfrm_mgr *km) |
1900 | { | |
85168c00 CW |
1901 | spin_lock_bh(&xfrm_km_lock); |
1902 | list_add_tail_rcu(&km->list, &xfrm_km_list); | |
1903 | spin_unlock_bh(&xfrm_km_lock); | |
1da177e4 LT |
1904 | return 0; |
1905 | } | |
1906 | EXPORT_SYMBOL(xfrm_register_km); | |
1907 | ||
1908 | int xfrm_unregister_km(struct xfrm_mgr *km) | |
1909 | { | |
85168c00 CW |
1910 | spin_lock_bh(&xfrm_km_lock); |
1911 | list_del_rcu(&km->list); | |
1912 | spin_unlock_bh(&xfrm_km_lock); | |
1913 | synchronize_rcu(); | |
1da177e4 LT |
1914 | return 0; |
1915 | } | |
1916 | EXPORT_SYMBOL(xfrm_unregister_km); | |
1917 | ||
1918 | int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo) | |
1919 | { | |
1920 | int err = 0; | |
1921 | if (unlikely(afinfo == NULL)) | |
1922 | return -EINVAL; | |
1923 | if (unlikely(afinfo->family >= NPROTO)) | |
1924 | return -EAFNOSUPPORT; | |
44abdc30 | 1925 | spin_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 | 1926 | if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL)) |
f31e8d4f | 1927 | err = -EEXIST; |
edcd5821 | 1928 | else |
44abdc30 CW |
1929 | rcu_assign_pointer(xfrm_state_afinfo[afinfo->family], afinfo); |
1930 | spin_unlock_bh(&xfrm_state_afinfo_lock); | |
1da177e4 LT |
1931 | return err; |
1932 | } | |
1933 | EXPORT_SYMBOL(xfrm_state_register_afinfo); | |
1934 | ||
1935 | int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo) | |
1936 | { | |
1937 | int err = 0; | |
1938 | if (unlikely(afinfo == NULL)) | |
1939 | return -EINVAL; | |
1940 | if (unlikely(afinfo->family >= NPROTO)) | |
1941 | return -EAFNOSUPPORT; | |
44abdc30 | 1942 | spin_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1943 | if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) { |
1944 | if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo)) | |
1945 | err = -EINVAL; | |
edcd5821 | 1946 | else |
44abdc30 | 1947 | RCU_INIT_POINTER(xfrm_state_afinfo[afinfo->family], NULL); |
1da177e4 | 1948 | } |
44abdc30 CW |
1949 | spin_unlock_bh(&xfrm_state_afinfo_lock); |
1950 | synchronize_rcu(); | |
1da177e4 LT |
1951 | return err; |
1952 | } | |
1953 | EXPORT_SYMBOL(xfrm_state_unregister_afinfo); | |
1954 | ||
628e341f | 1955 | struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family) |
1da177e4 LT |
1956 | { |
1957 | struct xfrm_state_afinfo *afinfo; | |
1958 | if (unlikely(family >= NPROTO)) | |
1959 | return NULL; | |
44abdc30 CW |
1960 | rcu_read_lock(); |
1961 | afinfo = rcu_dereference(xfrm_state_afinfo[family]); | |
546be240 | 1962 | if (unlikely(!afinfo)) |
44abdc30 | 1963 | rcu_read_unlock(); |
1da177e4 LT |
1964 | return afinfo; |
1965 | } | |
1966 | ||
628e341f | 1967 | void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo) |
1da177e4 | 1968 | { |
44abdc30 | 1969 | rcu_read_unlock(); |
1da177e4 LT |
1970 | } |
1971 | ||
1972 | /* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */ | |
1973 | void xfrm_state_delete_tunnel(struct xfrm_state *x) | |
1974 | { | |
1975 | if (x->tunnel) { | |
1976 | struct xfrm_state *t = x->tunnel; | |
1977 | ||
1978 | if (atomic_read(&t->tunnel_users) == 2) | |
1979 | xfrm_state_delete(t); | |
1980 | atomic_dec(&t->tunnel_users); | |
1981 | xfrm_state_put(t); | |
1982 | x->tunnel = NULL; | |
1983 | } | |
1984 | } | |
1985 | EXPORT_SYMBOL(xfrm_state_delete_tunnel); | |
1986 | ||
1987 | int xfrm_state_mtu(struct xfrm_state *x, int mtu) | |
1988 | { | |
c5c25238 | 1989 | int res; |
1da177e4 | 1990 | |
c5c25238 PM |
1991 | spin_lock_bh(&x->lock); |
1992 | if (x->km.state == XFRM_STATE_VALID && | |
1993 | x->type && x->type->get_mtu) | |
1994 | res = x->type->get_mtu(x, mtu); | |
1995 | else | |
28121617 | 1996 | res = mtu - x->props.header_len; |
c5c25238 | 1997 | spin_unlock_bh(&x->lock); |
1da177e4 LT |
1998 | return res; |
1999 | } | |
2000 | ||
a454f0cc | 2001 | int __xfrm_init_state(struct xfrm_state *x, bool init_replay) |
72cb6962 | 2002 | { |
d094cd83 | 2003 | struct xfrm_state_afinfo *afinfo; |
df9dcb45 | 2004 | struct xfrm_mode *inner_mode; |
d094cd83 | 2005 | int family = x->props.family; |
72cb6962 HX |
2006 | int err; |
2007 | ||
d094cd83 HX |
2008 | err = -EAFNOSUPPORT; |
2009 | afinfo = xfrm_state_get_afinfo(family); | |
2010 | if (!afinfo) | |
2011 | goto error; | |
2012 | ||
2013 | err = 0; | |
2014 | if (afinfo->init_flags) | |
2015 | err = afinfo->init_flags(x); | |
2016 | ||
2017 | xfrm_state_put_afinfo(afinfo); | |
2018 | ||
2019 | if (err) | |
2020 | goto error; | |
2021 | ||
2022 | err = -EPROTONOSUPPORT; | |
13996378 | 2023 | |
df9dcb45 KM |
2024 | if (x->sel.family != AF_UNSPEC) { |
2025 | inner_mode = xfrm_get_mode(x->props.mode, x->sel.family); | |
2026 | if (inner_mode == NULL) | |
2027 | goto error; | |
2028 | ||
2029 | if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) && | |
2030 | family != x->sel.family) { | |
2031 | xfrm_put_mode(inner_mode); | |
2032 | goto error; | |
2033 | } | |
2034 | ||
2035 | x->inner_mode = inner_mode; | |
2036 | } else { | |
2037 | struct xfrm_mode *inner_mode_iaf; | |
d81d2285 | 2038 | int iafamily = AF_INET; |
df9dcb45 | 2039 | |
d81d2285 | 2040 | inner_mode = xfrm_get_mode(x->props.mode, x->props.family); |
df9dcb45 KM |
2041 | if (inner_mode == NULL) |
2042 | goto error; | |
2043 | ||
2044 | if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) { | |
2045 | xfrm_put_mode(inner_mode); | |
2046 | goto error; | |
2047 | } | |
d81d2285 | 2048 | x->inner_mode = inner_mode; |
df9dcb45 | 2049 | |
d81d2285 MW |
2050 | if (x->props.family == AF_INET) |
2051 | iafamily = AF_INET6; | |
df9dcb45 | 2052 | |
d81d2285 MW |
2053 | inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily); |
2054 | if (inner_mode_iaf) { | |
2055 | if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL) | |
2056 | x->inner_mode_iaf = inner_mode_iaf; | |
2057 | else | |
2058 | xfrm_put_mode(inner_mode_iaf); | |
df9dcb45 KM |
2059 | } |
2060 | } | |
13996378 | 2061 | |
d094cd83 | 2062 | x->type = xfrm_get_type(x->id.proto, family); |
72cb6962 HX |
2063 | if (x->type == NULL) |
2064 | goto error; | |
2065 | ||
2066 | err = x->type->init_state(x); | |
2067 | if (err) | |
2068 | goto error; | |
2069 | ||
13996378 | 2070 | x->outer_mode = xfrm_get_mode(x->props.mode, family); |
599901c3 JL |
2071 | if (x->outer_mode == NULL) { |
2072 | err = -EPROTONOSUPPORT; | |
b59f45d0 | 2073 | goto error; |
599901c3 | 2074 | } |
b59f45d0 | 2075 | |
a454f0cc WY |
2076 | if (init_replay) { |
2077 | err = xfrm_init_replay(x); | |
2078 | if (err) | |
2079 | goto error; | |
2080 | } | |
2081 | ||
72cb6962 HX |
2082 | x->km.state = XFRM_STATE_VALID; |
2083 | ||
2084 | error: | |
2085 | return err; | |
2086 | } | |
2087 | ||
a454f0cc WY |
2088 | EXPORT_SYMBOL(__xfrm_init_state); |
2089 | ||
2090 | int xfrm_init_state(struct xfrm_state *x) | |
2091 | { | |
2092 | return __xfrm_init_state(x, true); | |
2093 | } | |
2094 | ||
72cb6962 | 2095 | EXPORT_SYMBOL(xfrm_init_state); |
a716c119 | 2096 | |
d62ddc21 | 2097 | int __net_init xfrm_state_init(struct net *net) |
1da177e4 | 2098 | { |
f034b5d4 DM |
2099 | unsigned int sz; |
2100 | ||
9d4139c7 AD |
2101 | INIT_LIST_HEAD(&net->xfrm.state_all); |
2102 | ||
f034b5d4 DM |
2103 | sz = sizeof(struct hlist_head) * 8; |
2104 | ||
73d189dc AD |
2105 | net->xfrm.state_bydst = xfrm_hash_alloc(sz); |
2106 | if (!net->xfrm.state_bydst) | |
2107 | goto out_bydst; | |
d320bbb3 AD |
2108 | net->xfrm.state_bysrc = xfrm_hash_alloc(sz); |
2109 | if (!net->xfrm.state_bysrc) | |
2110 | goto out_bysrc; | |
b754a4fd AD |
2111 | net->xfrm.state_byspi = xfrm_hash_alloc(sz); |
2112 | if (!net->xfrm.state_byspi) | |
2113 | goto out_byspi; | |
529983ec | 2114 | net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1); |
1da177e4 | 2115 | |
0bf7c5b0 | 2116 | net->xfrm.state_num = 0; |
63082733 | 2117 | INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize); |
b8a0ae20 | 2118 | INIT_HLIST_HEAD(&net->xfrm.state_gc_list); |
c7837144 | 2119 | INIT_WORK(&net->xfrm.state_gc_work, xfrm_state_gc_task); |
283bc9f3 | 2120 | spin_lock_init(&net->xfrm.xfrm_state_lock); |
d62ddc21 | 2121 | return 0; |
73d189dc | 2122 | |
b754a4fd AD |
2123 | out_byspi: |
2124 | xfrm_hash_free(net->xfrm.state_bysrc, sz); | |
d320bbb3 AD |
2125 | out_bysrc: |
2126 | xfrm_hash_free(net->xfrm.state_bydst, sz); | |
73d189dc AD |
2127 | out_bydst: |
2128 | return -ENOMEM; | |
d62ddc21 AD |
2129 | } |
2130 | ||
2131 | void xfrm_state_fini(struct net *net) | |
2132 | { | |
73d189dc AD |
2133 | unsigned int sz; |
2134 | ||
7c2776ee | 2135 | flush_work(&net->xfrm.state_hash_work); |
2e71029e | 2136 | xfrm_state_flush(net, IPSEC_PROTO_ANY, false); |
7c2776ee AD |
2137 | flush_work(&net->xfrm.state_gc_work); |
2138 | ||
9d4139c7 | 2139 | WARN_ON(!list_empty(&net->xfrm.state_all)); |
73d189dc | 2140 | |
529983ec | 2141 | sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head); |
b754a4fd AD |
2142 | WARN_ON(!hlist_empty(net->xfrm.state_byspi)); |
2143 | xfrm_hash_free(net->xfrm.state_byspi, sz); | |
d320bbb3 AD |
2144 | WARN_ON(!hlist_empty(net->xfrm.state_bysrc)); |
2145 | xfrm_hash_free(net->xfrm.state_bysrc, sz); | |
73d189dc AD |
2146 | WARN_ON(!hlist_empty(net->xfrm.state_bydst)); |
2147 | xfrm_hash_free(net->xfrm.state_bydst, sz); | |
1da177e4 LT |
2148 | } |
2149 | ||
ab5f5e8b | 2150 | #ifdef CONFIG_AUDITSYSCALL |
cf35f43e IJ |
2151 | static void xfrm_audit_helper_sainfo(struct xfrm_state *x, |
2152 | struct audit_buffer *audit_buf) | |
ab5f5e8b | 2153 | { |
68277acc PM |
2154 | struct xfrm_sec_ctx *ctx = x->security; |
2155 | u32 spi = ntohl(x->id.spi); | |
2156 | ||
2157 | if (ctx) | |
ab5f5e8b | 2158 | audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s", |
68277acc | 2159 | ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str); |
ab5f5e8b | 2160 | |
9b7a787d | 2161 | switch (x->props.family) { |
ab5f5e8b | 2162 | case AF_INET: |
21454aaa HH |
2163 | audit_log_format(audit_buf, " src=%pI4 dst=%pI4", |
2164 | &x->props.saddr.a4, &x->id.daddr.a4); | |
ab5f5e8b JL |
2165 | break; |
2166 | case AF_INET6: | |
5b095d98 | 2167 | audit_log_format(audit_buf, " src=%pI6 dst=%pI6", |
fdb46ee7 | 2168 | x->props.saddr.a6, x->id.daddr.a6); |
ab5f5e8b JL |
2169 | break; |
2170 | } | |
68277acc PM |
2171 | |
2172 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
ab5f5e8b JL |
2173 | } |
2174 | ||
cf35f43e IJ |
2175 | static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family, |
2176 | struct audit_buffer *audit_buf) | |
afeb14b4 | 2177 | { |
b71d1d42 ED |
2178 | const struct iphdr *iph4; |
2179 | const struct ipv6hdr *iph6; | |
afeb14b4 PM |
2180 | |
2181 | switch (family) { | |
2182 | case AF_INET: | |
2183 | iph4 = ip_hdr(skb); | |
21454aaa HH |
2184 | audit_log_format(audit_buf, " src=%pI4 dst=%pI4", |
2185 | &iph4->saddr, &iph4->daddr); | |
afeb14b4 PM |
2186 | break; |
2187 | case AF_INET6: | |
2188 | iph6 = ipv6_hdr(skb); | |
2189 | audit_log_format(audit_buf, | |
5b095d98 | 2190 | " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x", |
9b7a787d | 2191 | &iph6->saddr, &iph6->daddr, |
afeb14b4 PM |
2192 | iph6->flow_lbl[0] & 0x0f, |
2193 | iph6->flow_lbl[1], | |
2194 | iph6->flow_lbl[2]); | |
2195 | break; | |
2196 | } | |
2197 | } | |
2198 | ||
2e71029e | 2199 | void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid) |
ab5f5e8b JL |
2200 | { |
2201 | struct audit_buffer *audit_buf; | |
ab5f5e8b | 2202 | |
afeb14b4 | 2203 | audit_buf = xfrm_audit_start("SAD-add"); |
ab5f5e8b JL |
2204 | if (audit_buf == NULL) |
2205 | return; | |
2e71029e | 2206 | xfrm_audit_helper_usrinfo(task_valid, audit_buf); |
afeb14b4 PM |
2207 | xfrm_audit_helper_sainfo(x, audit_buf); |
2208 | audit_log_format(audit_buf, " res=%u", result); | |
ab5f5e8b JL |
2209 | audit_log_end(audit_buf); |
2210 | } | |
2211 | EXPORT_SYMBOL_GPL(xfrm_audit_state_add); | |
2212 | ||
2e71029e | 2213 | void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid) |
ab5f5e8b JL |
2214 | { |
2215 | struct audit_buffer *audit_buf; | |
ab5f5e8b | 2216 | |
afeb14b4 | 2217 | audit_buf = xfrm_audit_start("SAD-delete"); |
ab5f5e8b JL |
2218 | if (audit_buf == NULL) |
2219 | return; | |
2e71029e | 2220 | xfrm_audit_helper_usrinfo(task_valid, audit_buf); |
afeb14b4 PM |
2221 | xfrm_audit_helper_sainfo(x, audit_buf); |
2222 | audit_log_format(audit_buf, " res=%u", result); | |
ab5f5e8b JL |
2223 | audit_log_end(audit_buf); |
2224 | } | |
2225 | EXPORT_SYMBOL_GPL(xfrm_audit_state_delete); | |
afeb14b4 PM |
2226 | |
2227 | void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
2228 | struct sk_buff *skb) | |
2229 | { | |
2230 | struct audit_buffer *audit_buf; | |
2231 | u32 spi; | |
2232 | ||
2233 | audit_buf = xfrm_audit_start("SA-replay-overflow"); | |
2234 | if (audit_buf == NULL) | |
2235 | return; | |
2236 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2237 | /* don't record the sequence number because it's inherent in this kind | |
2238 | * of audit message */ | |
2239 | spi = ntohl(x->id.spi); | |
2240 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
2241 | audit_log_end(audit_buf); | |
2242 | } | |
2243 | EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow); | |
2244 | ||
9fdc4883 | 2245 | void xfrm_audit_state_replay(struct xfrm_state *x, |
afeb14b4 PM |
2246 | struct sk_buff *skb, __be32 net_seq) |
2247 | { | |
2248 | struct audit_buffer *audit_buf; | |
2249 | u32 spi; | |
2250 | ||
2251 | audit_buf = xfrm_audit_start("SA-replayed-pkt"); | |
2252 | if (audit_buf == NULL) | |
2253 | return; | |
2254 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2255 | spi = ntohl(x->id.spi); | |
2256 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2257 | spi, spi, ntohl(net_seq)); | |
2258 | audit_log_end(audit_buf); | |
2259 | } | |
9fdc4883 | 2260 | EXPORT_SYMBOL_GPL(xfrm_audit_state_replay); |
afeb14b4 PM |
2261 | |
2262 | void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family) | |
2263 | { | |
2264 | struct audit_buffer *audit_buf; | |
2265 | ||
2266 | audit_buf = xfrm_audit_start("SA-notfound"); | |
2267 | if (audit_buf == NULL) | |
2268 | return; | |
2269 | xfrm_audit_helper_pktinfo(skb, family, audit_buf); | |
2270 | audit_log_end(audit_buf); | |
2271 | } | |
2272 | EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple); | |
2273 | ||
2274 | void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
2275 | __be32 net_spi, __be32 net_seq) | |
2276 | { | |
2277 | struct audit_buffer *audit_buf; | |
2278 | u32 spi; | |
2279 | ||
2280 | audit_buf = xfrm_audit_start("SA-notfound"); | |
2281 | if (audit_buf == NULL) | |
2282 | return; | |
2283 | xfrm_audit_helper_pktinfo(skb, family, audit_buf); | |
2284 | spi = ntohl(net_spi); | |
2285 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2286 | spi, spi, ntohl(net_seq)); | |
2287 | audit_log_end(audit_buf); | |
2288 | } | |
2289 | EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound); | |
2290 | ||
2291 | void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
2292 | struct sk_buff *skb, u8 proto) | |
2293 | { | |
2294 | struct audit_buffer *audit_buf; | |
2295 | __be32 net_spi; | |
2296 | __be32 net_seq; | |
2297 | ||
2298 | audit_buf = xfrm_audit_start("SA-icv-failure"); | |
2299 | if (audit_buf == NULL) | |
2300 | return; | |
2301 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2302 | if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) { | |
2303 | u32 spi = ntohl(net_spi); | |
2304 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2305 | spi, spi, ntohl(net_seq)); | |
2306 | } | |
2307 | audit_log_end(audit_buf); | |
2308 | } | |
2309 | EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail); | |
ab5f5e8b | 2310 | #endif /* CONFIG_AUDITSYSCALL */ |