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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; |
b65e3d7b | 39 | static __read_mostly seqcount_t xfrm_state_hash_generation = SEQCNT_ZERO(xfrm_state_hash_generation); |
f034b5d4 | 40 | |
02efdff7 FW |
41 | static inline bool xfrm_state_hold_rcu(struct xfrm_state __rcu *x) |
42 | { | |
43 | return atomic_inc_not_zero(&x->refcnt); | |
44 | } | |
45 | ||
64d0cd00 | 46 | static inline unsigned int xfrm_dst_hash(struct net *net, |
2ab38503 DM |
47 | const xfrm_address_t *daddr, |
48 | const xfrm_address_t *saddr, | |
c1969f29 | 49 | u32 reqid, |
a624c108 | 50 | unsigned short family) |
f034b5d4 | 51 | { |
64d0cd00 | 52 | return __xfrm_dst_hash(daddr, saddr, reqid, family, net->xfrm.state_hmask); |
f034b5d4 DM |
53 | } |
54 | ||
64d0cd00 | 55 | static inline unsigned int xfrm_src_hash(struct net *net, |
2ab38503 DM |
56 | const xfrm_address_t *daddr, |
57 | const xfrm_address_t *saddr, | |
44e36b42 | 58 | unsigned short family) |
f034b5d4 | 59 | { |
64d0cd00 | 60 | return __xfrm_src_hash(daddr, saddr, family, net->xfrm.state_hmask); |
f034b5d4 DM |
61 | } |
62 | ||
f034b5d4 | 63 | static inline unsigned int |
2ab38503 DM |
64 | xfrm_spi_hash(struct net *net, const xfrm_address_t *daddr, |
65 | __be32 spi, u8 proto, unsigned short family) | |
f034b5d4 | 66 | { |
64d0cd00 | 67 | return __xfrm_spi_hash(daddr, spi, proto, family, net->xfrm.state_hmask); |
f034b5d4 DM |
68 | } |
69 | ||
f034b5d4 DM |
70 | static void xfrm_hash_transfer(struct hlist_head *list, |
71 | struct hlist_head *ndsttable, | |
72 | struct hlist_head *nsrctable, | |
73 | struct hlist_head *nspitable, | |
74 | unsigned int nhashmask) | |
75 | { | |
b67bfe0d | 76 | struct hlist_node *tmp; |
f034b5d4 DM |
77 | struct xfrm_state *x; |
78 | ||
b67bfe0d | 79 | hlist_for_each_entry_safe(x, tmp, list, bydst) { |
f034b5d4 DM |
80 | unsigned int h; |
81 | ||
c1969f29 DM |
82 | h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr, |
83 | x->props.reqid, x->props.family, | |
84 | nhashmask); | |
ae3fb6d3 | 85 | hlist_add_head_rcu(&x->bydst, ndsttable + h); |
f034b5d4 | 86 | |
667bbcb6 MN |
87 | h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr, |
88 | x->props.family, | |
f034b5d4 | 89 | nhashmask); |
ae3fb6d3 | 90 | hlist_add_head_rcu(&x->bysrc, nsrctable + h); |
f034b5d4 | 91 | |
7b4dc360 MN |
92 | if (x->id.spi) { |
93 | h = __xfrm_spi_hash(&x->id.daddr, x->id.spi, | |
94 | x->id.proto, x->props.family, | |
95 | nhashmask); | |
ae3fb6d3 | 96 | hlist_add_head_rcu(&x->byspi, nspitable + h); |
7b4dc360 | 97 | } |
f034b5d4 DM |
98 | } |
99 | } | |
100 | ||
63082733 | 101 | static unsigned long xfrm_hash_new_size(unsigned int state_hmask) |
f034b5d4 | 102 | { |
63082733 | 103 | return ((state_hmask + 1) << 1) * sizeof(struct hlist_head); |
f034b5d4 DM |
104 | } |
105 | ||
63082733 | 106 | static void xfrm_hash_resize(struct work_struct *work) |
f034b5d4 | 107 | { |
63082733 | 108 | struct net *net = container_of(work, struct net, xfrm.state_hash_work); |
f034b5d4 DM |
109 | struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi; |
110 | unsigned long nsize, osize; | |
111 | unsigned int nhashmask, ohashmask; | |
112 | int i; | |
113 | ||
63082733 | 114 | nsize = xfrm_hash_new_size(net->xfrm.state_hmask); |
44e36b42 | 115 | ndst = xfrm_hash_alloc(nsize); |
f034b5d4 | 116 | if (!ndst) |
0244790c | 117 | return; |
44e36b42 | 118 | nsrc = xfrm_hash_alloc(nsize); |
f034b5d4 | 119 | if (!nsrc) { |
44e36b42 | 120 | xfrm_hash_free(ndst, nsize); |
0244790c | 121 | return; |
f034b5d4 | 122 | } |
44e36b42 | 123 | nspi = xfrm_hash_alloc(nsize); |
f034b5d4 | 124 | if (!nspi) { |
44e36b42 DM |
125 | xfrm_hash_free(ndst, nsize); |
126 | xfrm_hash_free(nsrc, nsize); | |
0244790c | 127 | return; |
f034b5d4 DM |
128 | } |
129 | ||
283bc9f3 | 130 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
b65e3d7b | 131 | write_seqcount_begin(&xfrm_state_hash_generation); |
f034b5d4 DM |
132 | |
133 | nhashmask = (nsize / sizeof(struct hlist_head)) - 1U; | |
63082733 AD |
134 | for (i = net->xfrm.state_hmask; i >= 0; i--) |
135 | xfrm_hash_transfer(net->xfrm.state_bydst+i, ndst, nsrc, nspi, | |
f034b5d4 DM |
136 | nhashmask); |
137 | ||
63082733 AD |
138 | odst = net->xfrm.state_bydst; |
139 | osrc = net->xfrm.state_bysrc; | |
140 | ospi = net->xfrm.state_byspi; | |
141 | ohashmask = net->xfrm.state_hmask; | |
f034b5d4 | 142 | |
63082733 AD |
143 | net->xfrm.state_bydst = ndst; |
144 | net->xfrm.state_bysrc = nsrc; | |
145 | net->xfrm.state_byspi = nspi; | |
146 | net->xfrm.state_hmask = nhashmask; | |
f034b5d4 | 147 | |
b65e3d7b | 148 | write_seqcount_end(&xfrm_state_hash_generation); |
283bc9f3 | 149 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
f034b5d4 DM |
150 | |
151 | osize = (ohashmask + 1) * sizeof(struct hlist_head); | |
df7274eb FW |
152 | |
153 | synchronize_rcu(); | |
154 | ||
44e36b42 DM |
155 | xfrm_hash_free(odst, osize); |
156 | xfrm_hash_free(osrc, osize); | |
157 | xfrm_hash_free(ospi, osize); | |
f034b5d4 DM |
158 | } |
159 | ||
44abdc30 CW |
160 | static DEFINE_SPINLOCK(xfrm_state_afinfo_lock); |
161 | static struct xfrm_state_afinfo __rcu *xfrm_state_afinfo[NPROTO]; | |
1da177e4 | 162 | |
1da177e4 LT |
163 | static DEFINE_SPINLOCK(xfrm_state_gc_lock); |
164 | ||
53bc6b4d | 165 | int __xfrm_state_delete(struct xfrm_state *x); |
1da177e4 | 166 | |
980ebd25 | 167 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); |
0f24558e | 168 | bool km_is_alive(const struct km_event *c); |
15e47304 | 169 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid); |
1da177e4 | 170 | |
7a9885b9 | 171 | static DEFINE_SPINLOCK(xfrm_type_lock); |
533cb5b0 | 172 | int xfrm_register_type(const struct xfrm_type *type, unsigned short family) |
aa5d62cc | 173 | { |
7a9885b9 | 174 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); |
533cb5b0 | 175 | const struct xfrm_type **typemap; |
aa5d62cc HX |
176 | int err = 0; |
177 | ||
178 | if (unlikely(afinfo == NULL)) | |
179 | return -EAFNOSUPPORT; | |
180 | typemap = afinfo->type_map; | |
7a9885b9 | 181 | spin_lock_bh(&xfrm_type_lock); |
aa5d62cc HX |
182 | |
183 | if (likely(typemap[type->proto] == NULL)) | |
184 | typemap[type->proto] = type; | |
185 | else | |
186 | err = -EEXIST; | |
7a9885b9 CW |
187 | spin_unlock_bh(&xfrm_type_lock); |
188 | xfrm_state_put_afinfo(afinfo); | |
aa5d62cc HX |
189 | return err; |
190 | } | |
191 | EXPORT_SYMBOL(xfrm_register_type); | |
192 | ||
533cb5b0 | 193 | int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family) |
aa5d62cc | 194 | { |
7a9885b9 | 195 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); |
533cb5b0 | 196 | const struct xfrm_type **typemap; |
aa5d62cc HX |
197 | int err = 0; |
198 | ||
199 | if (unlikely(afinfo == NULL)) | |
200 | return -EAFNOSUPPORT; | |
201 | typemap = afinfo->type_map; | |
7a9885b9 | 202 | spin_lock_bh(&xfrm_type_lock); |
aa5d62cc HX |
203 | |
204 | if (unlikely(typemap[type->proto] != type)) | |
205 | err = -ENOENT; | |
206 | else | |
207 | typemap[type->proto] = NULL; | |
7a9885b9 CW |
208 | spin_unlock_bh(&xfrm_type_lock); |
209 | xfrm_state_put_afinfo(afinfo); | |
aa5d62cc HX |
210 | return err; |
211 | } | |
212 | EXPORT_SYMBOL(xfrm_unregister_type); | |
213 | ||
533cb5b0 | 214 | static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family) |
aa5d62cc HX |
215 | { |
216 | struct xfrm_state_afinfo *afinfo; | |
533cb5b0 ED |
217 | const struct xfrm_type **typemap; |
218 | const struct xfrm_type *type; | |
aa5d62cc HX |
219 | int modload_attempted = 0; |
220 | ||
221 | retry: | |
222 | afinfo = xfrm_state_get_afinfo(family); | |
223 | if (unlikely(afinfo == NULL)) | |
224 | return NULL; | |
225 | typemap = afinfo->type_map; | |
226 | ||
227 | type = typemap[proto]; | |
228 | if (unlikely(type && !try_module_get(type->owner))) | |
229 | type = NULL; | |
230 | if (!type && !modload_attempted) { | |
231 | xfrm_state_put_afinfo(afinfo); | |
232 | request_module("xfrm-type-%d-%d", family, proto); | |
233 | modload_attempted = 1; | |
234 | goto retry; | |
235 | } | |
236 | ||
237 | xfrm_state_put_afinfo(afinfo); | |
238 | return type; | |
239 | } | |
240 | ||
533cb5b0 | 241 | static void xfrm_put_type(const struct xfrm_type *type) |
aa5d62cc HX |
242 | { |
243 | module_put(type->owner); | |
244 | } | |
245 | ||
7a9885b9 | 246 | static DEFINE_SPINLOCK(xfrm_mode_lock); |
aa5d62cc HX |
247 | int xfrm_register_mode(struct xfrm_mode *mode, int family) |
248 | { | |
249 | struct xfrm_state_afinfo *afinfo; | |
250 | struct xfrm_mode **modemap; | |
251 | int err; | |
252 | ||
253 | if (unlikely(mode->encap >= XFRM_MODE_MAX)) | |
254 | return -EINVAL; | |
255 | ||
7a9885b9 | 256 | afinfo = xfrm_state_get_afinfo(family); |
aa5d62cc HX |
257 | if (unlikely(afinfo == NULL)) |
258 | return -EAFNOSUPPORT; | |
259 | ||
260 | err = -EEXIST; | |
261 | modemap = afinfo->mode_map; | |
7a9885b9 | 262 | spin_lock_bh(&xfrm_mode_lock); |
17c2a42a HX |
263 | if (modemap[mode->encap]) |
264 | goto out; | |
aa5d62cc | 265 | |
17c2a42a HX |
266 | err = -ENOENT; |
267 | if (!try_module_get(afinfo->owner)) | |
268 | goto out; | |
269 | ||
270 | mode->afinfo = afinfo; | |
271 | modemap[mode->encap] = mode; | |
272 | err = 0; | |
273 | ||
274 | out: | |
7a9885b9 CW |
275 | spin_unlock_bh(&xfrm_mode_lock); |
276 | xfrm_state_put_afinfo(afinfo); | |
aa5d62cc HX |
277 | return err; |
278 | } | |
279 | EXPORT_SYMBOL(xfrm_register_mode); | |
280 | ||
281 | int xfrm_unregister_mode(struct xfrm_mode *mode, int family) | |
282 | { | |
283 | struct xfrm_state_afinfo *afinfo; | |
284 | struct xfrm_mode **modemap; | |
285 | int err; | |
286 | ||
287 | if (unlikely(mode->encap >= XFRM_MODE_MAX)) | |
288 | return -EINVAL; | |
289 | ||
7a9885b9 | 290 | afinfo = xfrm_state_get_afinfo(family); |
aa5d62cc HX |
291 | if (unlikely(afinfo == NULL)) |
292 | return -EAFNOSUPPORT; | |
293 | ||
294 | err = -ENOENT; | |
295 | modemap = afinfo->mode_map; | |
7a9885b9 | 296 | spin_lock_bh(&xfrm_mode_lock); |
aa5d62cc HX |
297 | if (likely(modemap[mode->encap] == mode)) { |
298 | modemap[mode->encap] = NULL; | |
17c2a42a | 299 | module_put(mode->afinfo->owner); |
aa5d62cc HX |
300 | err = 0; |
301 | } | |
302 | ||
7a9885b9 CW |
303 | spin_unlock_bh(&xfrm_mode_lock); |
304 | xfrm_state_put_afinfo(afinfo); | |
aa5d62cc HX |
305 | return err; |
306 | } | |
307 | EXPORT_SYMBOL(xfrm_unregister_mode); | |
308 | ||
309 | static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family) | |
310 | { | |
311 | struct xfrm_state_afinfo *afinfo; | |
312 | struct xfrm_mode *mode; | |
313 | int modload_attempted = 0; | |
314 | ||
315 | if (unlikely(encap >= XFRM_MODE_MAX)) | |
316 | return NULL; | |
317 | ||
318 | retry: | |
319 | afinfo = xfrm_state_get_afinfo(family); | |
320 | if (unlikely(afinfo == NULL)) | |
321 | return NULL; | |
322 | ||
323 | mode = afinfo->mode_map[encap]; | |
324 | if (unlikely(mode && !try_module_get(mode->owner))) | |
325 | mode = NULL; | |
326 | if (!mode && !modload_attempted) { | |
327 | xfrm_state_put_afinfo(afinfo); | |
328 | request_module("xfrm-mode-%d-%d", family, encap); | |
329 | modload_attempted = 1; | |
330 | goto retry; | |
331 | } | |
332 | ||
333 | xfrm_state_put_afinfo(afinfo); | |
334 | return mode; | |
335 | } | |
336 | ||
337 | static void xfrm_put_mode(struct xfrm_mode *mode) | |
338 | { | |
339 | module_put(mode->owner); | |
340 | } | |
341 | ||
1da177e4 LT |
342 | static void xfrm_state_gc_destroy(struct xfrm_state *x) |
343 | { | |
9e0d57fd | 344 | tasklet_hrtimer_cancel(&x->mtimer); |
a47f0ce0 | 345 | del_timer_sync(&x->rtimer); |
a51482bd JJ |
346 | kfree(x->aalg); |
347 | kfree(x->ealg); | |
348 | kfree(x->calg); | |
349 | kfree(x->encap); | |
060f02a3 | 350 | kfree(x->coaddr); |
d8647b79 SK |
351 | kfree(x->replay_esn); |
352 | kfree(x->preplay_esn); | |
13996378 HX |
353 | if (x->inner_mode) |
354 | xfrm_put_mode(x->inner_mode); | |
df9dcb45 KM |
355 | if (x->inner_mode_iaf) |
356 | xfrm_put_mode(x->inner_mode_iaf); | |
13996378 HX |
357 | if (x->outer_mode) |
358 | xfrm_put_mode(x->outer_mode); | |
1da177e4 LT |
359 | if (x->type) { |
360 | x->type->destructor(x); | |
361 | xfrm_put_type(x->type); | |
362 | } | |
df71837d | 363 | security_xfrm_state_free(x); |
1da177e4 LT |
364 | kfree(x); |
365 | } | |
366 | ||
c7837144 | 367 | static void xfrm_state_gc_task(struct work_struct *work) |
1da177e4 | 368 | { |
c7837144 | 369 | struct net *net = container_of(work, struct net, xfrm.state_gc_work); |
12a169e7 | 370 | struct xfrm_state *x; |
b67bfe0d | 371 | struct hlist_node *tmp; |
12a169e7 | 372 | struct hlist_head gc_list; |
1da177e4 | 373 | |
1da177e4 | 374 | spin_lock_bh(&xfrm_state_gc_lock); |
c7837144 | 375 | hlist_move_list(&net->xfrm.state_gc_list, &gc_list); |
1da177e4 LT |
376 | spin_unlock_bh(&xfrm_state_gc_lock); |
377 | ||
df7274eb FW |
378 | synchronize_rcu(); |
379 | ||
b67bfe0d | 380 | hlist_for_each_entry_safe(x, tmp, &gc_list, gclist) |
1da177e4 | 381 | xfrm_state_gc_destroy(x); |
1da177e4 LT |
382 | } |
383 | ||
384 | static inline unsigned long make_jiffies(long secs) | |
385 | { | |
386 | if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ) | |
387 | return MAX_SCHEDULE_TIMEOUT-1; | |
388 | else | |
a716c119 | 389 | return secs*HZ; |
1da177e4 LT |
390 | } |
391 | ||
3e94c2dc | 392 | static enum hrtimer_restart xfrm_timer_handler(struct hrtimer *me) |
1da177e4 | 393 | { |
9e0d57fd YP |
394 | struct tasklet_hrtimer *thr = container_of(me, struct tasklet_hrtimer, timer); |
395 | struct xfrm_state *x = container_of(thr, struct xfrm_state, mtimer); | |
9d729f72 | 396 | unsigned long now = get_seconds(); |
1da177e4 LT |
397 | long next = LONG_MAX; |
398 | int warn = 0; | |
161a09e7 | 399 | int err = 0; |
1da177e4 LT |
400 | |
401 | spin_lock(&x->lock); | |
402 | if (x->km.state == XFRM_STATE_DEAD) | |
403 | goto out; | |
404 | if (x->km.state == XFRM_STATE_EXPIRED) | |
405 | goto expired; | |
406 | if (x->lft.hard_add_expires_seconds) { | |
407 | long tmo = x->lft.hard_add_expires_seconds + | |
408 | x->curlft.add_time - now; | |
e3c0d047 FD |
409 | if (tmo <= 0) { |
410 | if (x->xflags & XFRM_SOFT_EXPIRE) { | |
411 | /* enter hard expire without soft expire first?! | |
412 | * setting a new date could trigger this. | |
413 | * workarbound: fix x->curflt.add_time by below: | |
414 | */ | |
415 | x->curlft.add_time = now - x->saved_tmo - 1; | |
416 | tmo = x->lft.hard_add_expires_seconds - x->saved_tmo; | |
417 | } else | |
418 | goto expired; | |
419 | } | |
1da177e4 LT |
420 | if (tmo < next) |
421 | next = tmo; | |
422 | } | |
423 | if (x->lft.hard_use_expires_seconds) { | |
424 | long tmo = x->lft.hard_use_expires_seconds + | |
425 | (x->curlft.use_time ? : now) - now; | |
426 | if (tmo <= 0) | |
427 | goto expired; | |
428 | if (tmo < next) | |
429 | next = tmo; | |
430 | } | |
431 | if (x->km.dying) | |
432 | goto resched; | |
433 | if (x->lft.soft_add_expires_seconds) { | |
434 | long tmo = x->lft.soft_add_expires_seconds + | |
435 | x->curlft.add_time - now; | |
e3c0d047 | 436 | if (tmo <= 0) { |
1da177e4 | 437 | warn = 1; |
e3c0d047 FD |
438 | x->xflags &= ~XFRM_SOFT_EXPIRE; |
439 | } else if (tmo < next) { | |
1da177e4 | 440 | next = tmo; |
e3c0d047 FD |
441 | x->xflags |= XFRM_SOFT_EXPIRE; |
442 | x->saved_tmo = tmo; | |
443 | } | |
1da177e4 LT |
444 | } |
445 | if (x->lft.soft_use_expires_seconds) { | |
446 | long tmo = x->lft.soft_use_expires_seconds + | |
447 | (x->curlft.use_time ? : now) - now; | |
448 | if (tmo <= 0) | |
449 | warn = 1; | |
450 | else if (tmo < next) | |
451 | next = tmo; | |
452 | } | |
453 | ||
4666faab | 454 | x->km.dying = warn; |
1da177e4 | 455 | if (warn) |
53bc6b4d | 456 | km_state_expired(x, 0, 0); |
1da177e4 | 457 | resched: |
9b7a787d | 458 | if (next != LONG_MAX) { |
9e0d57fd YP |
459 | tasklet_hrtimer_start(&x->mtimer, ktime_set(next, 0), HRTIMER_MODE_REL); |
460 | } | |
a47f0ce0 | 461 | |
1da177e4 LT |
462 | goto out; |
463 | ||
464 | expired: | |
5b8ef341 | 465 | if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) |
1da177e4 | 466 | x->km.state = XFRM_STATE_EXPIRED; |
161a09e7 JL |
467 | |
468 | err = __xfrm_state_delete(x); | |
0806ae4c | 469 | if (!err) |
53bc6b4d | 470 | km_state_expired(x, 1, 0); |
1da177e4 | 471 | |
2e71029e | 472 | xfrm_audit_state_delete(x, err ? 0 : 1, true); |
161a09e7 | 473 | |
1da177e4 LT |
474 | out: |
475 | spin_unlock(&x->lock); | |
9e0d57fd | 476 | return HRTIMER_NORESTART; |
1da177e4 LT |
477 | } |
478 | ||
0ac84752 DM |
479 | static void xfrm_replay_timer_handler(unsigned long data); |
480 | ||
673c09be | 481 | struct xfrm_state *xfrm_state_alloc(struct net *net) |
1da177e4 LT |
482 | { |
483 | struct xfrm_state *x; | |
484 | ||
0da974f4 | 485 | x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC); |
1da177e4 LT |
486 | |
487 | if (x) { | |
673c09be | 488 | write_pnet(&x->xs_net, net); |
1da177e4 LT |
489 | atomic_set(&x->refcnt, 1); |
490 | atomic_set(&x->tunnel_users, 0); | |
12a169e7 | 491 | INIT_LIST_HEAD(&x->km.all); |
8f126e37 DM |
492 | INIT_HLIST_NODE(&x->bydst); |
493 | INIT_HLIST_NODE(&x->bysrc); | |
494 | INIT_HLIST_NODE(&x->byspi); | |
99565a6c FD |
495 | tasklet_hrtimer_init(&x->mtimer, xfrm_timer_handler, |
496 | CLOCK_BOOTTIME, HRTIMER_MODE_ABS); | |
b24b8a24 PE |
497 | setup_timer(&x->rtimer, xfrm_replay_timer_handler, |
498 | (unsigned long)x); | |
9d729f72 | 499 | x->curlft.add_time = get_seconds(); |
1da177e4 LT |
500 | x->lft.soft_byte_limit = XFRM_INF; |
501 | x->lft.soft_packet_limit = XFRM_INF; | |
502 | x->lft.hard_byte_limit = XFRM_INF; | |
503 | x->lft.hard_packet_limit = XFRM_INF; | |
f8cd5488 JHS |
504 | x->replay_maxage = 0; |
505 | x->replay_maxdiff = 0; | |
df9dcb45 KM |
506 | x->inner_mode = NULL; |
507 | x->inner_mode_iaf = NULL; | |
1da177e4 LT |
508 | spin_lock_init(&x->lock); |
509 | } | |
510 | return x; | |
511 | } | |
512 | EXPORT_SYMBOL(xfrm_state_alloc); | |
513 | ||
514 | void __xfrm_state_destroy(struct xfrm_state *x) | |
515 | { | |
98806f75 AD |
516 | struct net *net = xs_net(x); |
517 | ||
547b792c | 518 | WARN_ON(x->km.state != XFRM_STATE_DEAD); |
1da177e4 LT |
519 | |
520 | spin_lock_bh(&xfrm_state_gc_lock); | |
98806f75 | 521 | hlist_add_head(&x->gclist, &net->xfrm.state_gc_list); |
1da177e4 | 522 | spin_unlock_bh(&xfrm_state_gc_lock); |
98806f75 | 523 | schedule_work(&net->xfrm.state_gc_work); |
1da177e4 LT |
524 | } |
525 | EXPORT_SYMBOL(__xfrm_state_destroy); | |
526 | ||
53bc6b4d | 527 | int __xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 528 | { |
98806f75 | 529 | struct net *net = xs_net(x); |
26b15dad JHS |
530 | int err = -ESRCH; |
531 | ||
1da177e4 LT |
532 | if (x->km.state != XFRM_STATE_DEAD) { |
533 | x->km.state = XFRM_STATE_DEAD; | |
283bc9f3 | 534 | spin_lock(&net->xfrm.xfrm_state_lock); |
12a169e7 | 535 | list_del(&x->km.all); |
ae3fb6d3 FW |
536 | hlist_del_rcu(&x->bydst); |
537 | hlist_del_rcu(&x->bysrc); | |
a47f0ce0 | 538 | if (x->id.spi) |
ae3fb6d3 | 539 | hlist_del_rcu(&x->byspi); |
98806f75 | 540 | net->xfrm.state_num--; |
283bc9f3 | 541 | spin_unlock(&net->xfrm.xfrm_state_lock); |
1da177e4 | 542 | |
1da177e4 LT |
543 | /* All xfrm_state objects are created by xfrm_state_alloc. |
544 | * The xfrm_state_alloc call gives a reference, and that | |
545 | * is what we are dropping here. | |
546 | */ | |
5dba4797 | 547 | xfrm_state_put(x); |
26b15dad | 548 | err = 0; |
1da177e4 | 549 | } |
26b15dad JHS |
550 | |
551 | return err; | |
1da177e4 | 552 | } |
53bc6b4d | 553 | EXPORT_SYMBOL(__xfrm_state_delete); |
1da177e4 | 554 | |
26b15dad | 555 | int xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 556 | { |
26b15dad JHS |
557 | int err; |
558 | ||
1da177e4 | 559 | spin_lock_bh(&x->lock); |
26b15dad | 560 | err = __xfrm_state_delete(x); |
1da177e4 | 561 | spin_unlock_bh(&x->lock); |
26b15dad JHS |
562 | |
563 | return err; | |
1da177e4 LT |
564 | } |
565 | EXPORT_SYMBOL(xfrm_state_delete); | |
566 | ||
4aa2e62c JL |
567 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
568 | static inline int | |
2e71029e | 569 | xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid) |
1da177e4 | 570 | { |
4aa2e62c JL |
571 | int i, err = 0; |
572 | ||
0e602451 | 573 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
4aa2e62c JL |
574 | struct xfrm_state *x; |
575 | ||
b67bfe0d | 576 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
4aa2e62c JL |
577 | if (xfrm_id_proto_match(x->id.proto, proto) && |
578 | (err = security_xfrm_state_delete(x)) != 0) { | |
2e71029e | 579 | xfrm_audit_state_delete(x, 0, task_valid); |
4aa2e62c JL |
580 | return err; |
581 | } | |
582 | } | |
583 | } | |
584 | ||
585 | return err; | |
586 | } | |
587 | #else | |
588 | static inline int | |
2e71029e | 589 | xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid) |
4aa2e62c JL |
590 | { |
591 | return 0; | |
592 | } | |
593 | #endif | |
594 | ||
2e71029e | 595 | int xfrm_state_flush(struct net *net, u8 proto, bool task_valid) |
4aa2e62c | 596 | { |
9e64cc95 | 597 | int i, err = 0, cnt = 0; |
1da177e4 | 598 | |
283bc9f3 | 599 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
2e71029e | 600 | err = xfrm_state_flush_secctx_check(net, proto, task_valid); |
4aa2e62c JL |
601 | if (err) |
602 | goto out; | |
603 | ||
9e64cc95 | 604 | err = -ESRCH; |
0e602451 | 605 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
8f126e37 | 606 | struct xfrm_state *x; |
1da177e4 | 607 | restart: |
b67bfe0d | 608 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
1da177e4 | 609 | if (!xfrm_state_kern(x) && |
5794708f | 610 | xfrm_id_proto_match(x->id.proto, proto)) { |
1da177e4 | 611 | xfrm_state_hold(x); |
283bc9f3 | 612 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 613 | |
161a09e7 | 614 | err = xfrm_state_delete(x); |
ab5f5e8b | 615 | xfrm_audit_state_delete(x, err ? 0 : 1, |
2e71029e | 616 | task_valid); |
1da177e4 | 617 | xfrm_state_put(x); |
9e64cc95 JHS |
618 | if (!err) |
619 | cnt++; | |
1da177e4 | 620 | |
283bc9f3 | 621 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
622 | goto restart; |
623 | } | |
624 | } | |
625 | } | |
9e64cc95 JHS |
626 | if (cnt) |
627 | err = 0; | |
4aa2e62c JL |
628 | |
629 | out: | |
283bc9f3 | 630 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
4aa2e62c | 631 | return err; |
1da177e4 LT |
632 | } |
633 | EXPORT_SYMBOL(xfrm_state_flush); | |
634 | ||
e071041b | 635 | void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si) |
28d8909b | 636 | { |
283bc9f3 | 637 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
e071041b AD |
638 | si->sadcnt = net->xfrm.state_num; |
639 | si->sadhcnt = net->xfrm.state_hmask; | |
28d8909b | 640 | si->sadhmcnt = xfrm_state_hashmax; |
283bc9f3 | 641 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
28d8909b JHS |
642 | } |
643 | EXPORT_SYMBOL(xfrm_sad_getinfo); | |
644 | ||
1da177e4 | 645 | static int |
1a898592 | 646 | xfrm_init_tempstate(struct xfrm_state *x, const struct flowi *fl, |
04686013 | 647 | const struct xfrm_tmpl *tmpl, |
33765d06 | 648 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
8444cf71 | 649 | unsigned short family) |
1da177e4 LT |
650 | { |
651 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
652 | if (!afinfo) | |
653 | return -1; | |
8444cf71 TE |
654 | afinfo->init_tempsel(&x->sel, fl); |
655 | ||
656 | if (family != tmpl->encap_family) { | |
657 | xfrm_state_put_afinfo(afinfo); | |
658 | afinfo = xfrm_state_get_afinfo(tmpl->encap_family); | |
659 | if (!afinfo) | |
660 | return -1; | |
661 | } | |
662 | afinfo->init_temprop(x, tmpl, daddr, saddr); | |
1da177e4 LT |
663 | xfrm_state_put_afinfo(afinfo); |
664 | return 0; | |
665 | } | |
666 | ||
9aa60088 DM |
667 | static struct xfrm_state *__xfrm_state_lookup(struct net *net, u32 mark, |
668 | const xfrm_address_t *daddr, | |
669 | __be32 spi, u8 proto, | |
670 | unsigned short family) | |
edcd5821 | 671 | { |
221df1ed | 672 | unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family); |
edcd5821 DM |
673 | struct xfrm_state *x; |
674 | ||
ae3fb6d3 | 675 | hlist_for_each_entry_rcu(x, net->xfrm.state_byspi + h, byspi) { |
edcd5821 DM |
676 | if (x->props.family != family || |
677 | x->id.spi != spi || | |
1802571b | 678 | x->id.proto != proto || |
70e94e66 | 679 | !xfrm_addr_equal(&x->id.daddr, daddr, family)) |
edcd5821 DM |
680 | continue; |
681 | ||
3d6acfa7 JHS |
682 | if ((mark & x->mark.m) != x->mark.v) |
683 | continue; | |
02efdff7 FW |
684 | if (!xfrm_state_hold_rcu(x)) |
685 | continue; | |
edcd5821 DM |
686 | return x; |
687 | } | |
688 | ||
689 | return NULL; | |
690 | } | |
691 | ||
9aa60088 DM |
692 | static struct xfrm_state *__xfrm_state_lookup_byaddr(struct net *net, u32 mark, |
693 | const xfrm_address_t *daddr, | |
694 | const xfrm_address_t *saddr, | |
695 | u8 proto, unsigned short family) | |
edcd5821 | 696 | { |
221df1ed | 697 | unsigned int h = xfrm_src_hash(net, daddr, saddr, family); |
edcd5821 DM |
698 | struct xfrm_state *x; |
699 | ||
ae3fb6d3 | 700 | hlist_for_each_entry_rcu(x, net->xfrm.state_bysrc + h, bysrc) { |
edcd5821 | 701 | if (x->props.family != family || |
1802571b | 702 | x->id.proto != proto || |
70e94e66 YH |
703 | !xfrm_addr_equal(&x->id.daddr, daddr, family) || |
704 | !xfrm_addr_equal(&x->props.saddr, saddr, family)) | |
edcd5821 DM |
705 | continue; |
706 | ||
3d6acfa7 JHS |
707 | if ((mark & x->mark.m) != x->mark.v) |
708 | continue; | |
02efdff7 FW |
709 | if (!xfrm_state_hold_rcu(x)) |
710 | continue; | |
edcd5821 DM |
711 | return x; |
712 | } | |
713 | ||
714 | return NULL; | |
715 | } | |
716 | ||
717 | static inline struct xfrm_state * | |
718 | __xfrm_state_locate(struct xfrm_state *x, int use_spi, int family) | |
719 | { | |
221df1ed | 720 | struct net *net = xs_net(x); |
bd55775c | 721 | u32 mark = x->mark.v & x->mark.m; |
221df1ed | 722 | |
edcd5821 | 723 | if (use_spi) |
bd55775c JHS |
724 | return __xfrm_state_lookup(net, mark, &x->id.daddr, |
725 | x->id.spi, x->id.proto, family); | |
edcd5821 | 726 | else |
bd55775c JHS |
727 | return __xfrm_state_lookup_byaddr(net, mark, |
728 | &x->id.daddr, | |
edcd5821 DM |
729 | &x->props.saddr, |
730 | x->id.proto, family); | |
731 | } | |
732 | ||
98806f75 | 733 | static void xfrm_hash_grow_check(struct net *net, int have_hash_collision) |
2fab22f2 PM |
734 | { |
735 | if (have_hash_collision && | |
98806f75 AD |
736 | (net->xfrm.state_hmask + 1) < xfrm_state_hashmax && |
737 | net->xfrm.state_num > net->xfrm.state_hmask) | |
738 | schedule_work(&net->xfrm.state_hash_work); | |
2fab22f2 PM |
739 | } |
740 | ||
08ec9af1 | 741 | static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x, |
4a08ab0f | 742 | const struct flowi *fl, unsigned short family, |
08ec9af1 DM |
743 | struct xfrm_state **best, int *acq_in_progress, |
744 | int *error) | |
745 | { | |
746 | /* Resolution logic: | |
747 | * 1. There is a valid state with matching selector. Done. | |
748 | * 2. Valid state with inappropriate selector. Skip. | |
749 | * | |
750 | * Entering area of "sysdeps". | |
751 | * | |
752 | * 3. If state is not valid, selector is temporary, it selects | |
753 | * only session which triggered previous resolution. Key | |
754 | * manager will do something to install a state with proper | |
755 | * selector. | |
756 | */ | |
757 | if (x->km.state == XFRM_STATE_VALID) { | |
758 | if ((x->sel.family && | |
759 | !xfrm_selector_match(&x->sel, fl, x->sel.family)) || | |
760 | !security_xfrm_state_pol_flow_match(x, pol, fl)) | |
761 | return; | |
762 | ||
763 | if (!*best || | |
764 | (*best)->km.dying > x->km.dying || | |
765 | ((*best)->km.dying == x->km.dying && | |
766 | (*best)->curlft.add_time < x->curlft.add_time)) | |
767 | *best = x; | |
768 | } else if (x->km.state == XFRM_STATE_ACQ) { | |
769 | *acq_in_progress = 1; | |
770 | } else if (x->km.state == XFRM_STATE_ERROR || | |
771 | x->km.state == XFRM_STATE_EXPIRED) { | |
772 | if (xfrm_selector_match(&x->sel, fl, x->sel.family) && | |
773 | security_xfrm_state_pol_flow_match(x, pol, fl)) | |
774 | *error = -ESRCH; | |
775 | } | |
776 | } | |
777 | ||
1da177e4 | 778 | struct xfrm_state * |
33765d06 | 779 | xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
b520e9f6 | 780 | const struct flowi *fl, struct xfrm_tmpl *tmpl, |
1da177e4 LT |
781 | struct xfrm_policy *pol, int *err, |
782 | unsigned short family) | |
783 | { | |
08ec9af1 | 784 | static xfrm_address_t saddr_wildcard = { }; |
5447c5e4 | 785 | struct net *net = xp_net(pol); |
6a783c90 | 786 | unsigned int h, h_wildcard; |
37b08e34 | 787 | struct xfrm_state *x, *x0, *to_put; |
1da177e4 LT |
788 | int acquire_in_progress = 0; |
789 | int error = 0; | |
790 | struct xfrm_state *best = NULL; | |
bd55775c | 791 | u32 mark = pol->mark.v & pol->mark.m; |
8444cf71 | 792 | unsigned short encap_family = tmpl->encap_family; |
b65e3d7b | 793 | unsigned int sequence; |
0f24558e | 794 | struct km_event c; |
a716c119 | 795 | |
37b08e34 DM |
796 | to_put = NULL; |
797 | ||
b65e3d7b FW |
798 | sequence = read_seqcount_begin(&xfrm_state_hash_generation); |
799 | ||
283bc9f3 | 800 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
8444cf71 | 801 | h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family); |
ae3fb6d3 | 802 | hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h, bydst) { |
8444cf71 | 803 | if (x->props.family == encap_family && |
1da177e4 | 804 | x->props.reqid == tmpl->reqid && |
3d6acfa7 | 805 | (mark & x->mark.m) == x->mark.v && |
fbd9a5b4 | 806 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
8444cf71 | 807 | xfrm_state_addr_check(x, daddr, saddr, encap_family) && |
1da177e4 LT |
808 | tmpl->mode == x->props.mode && |
809 | tmpl->id.proto == x->id.proto && | |
08ec9af1 | 810 | (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) |
1f673c5f | 811 | xfrm_state_look_at(pol, x, fl, encap_family, |
08ec9af1 DM |
812 | &best, &acquire_in_progress, &error); |
813 | } | |
6f115638 | 814 | if (best || acquire_in_progress) |
08ec9af1 DM |
815 | goto found; |
816 | ||
8444cf71 | 817 | h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, encap_family); |
ae3fb6d3 | 818 | hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h_wildcard, bydst) { |
8444cf71 | 819 | if (x->props.family == encap_family && |
08ec9af1 | 820 | x->props.reqid == tmpl->reqid && |
3d6acfa7 | 821 | (mark & x->mark.m) == x->mark.v && |
08ec9af1 | 822 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
f59bbdfa | 823 | xfrm_addr_equal(&x->id.daddr, daddr, encap_family) && |
08ec9af1 DM |
824 | tmpl->mode == x->props.mode && |
825 | tmpl->id.proto == x->id.proto && | |
826 | (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) | |
1f673c5f | 827 | xfrm_state_look_at(pol, x, fl, encap_family, |
08ec9af1 | 828 | &best, &acquire_in_progress, &error); |
1da177e4 LT |
829 | } |
830 | ||
08ec9af1 | 831 | found: |
1da177e4 LT |
832 | x = best; |
833 | if (!x && !error && !acquire_in_progress) { | |
5c5d281a | 834 | if (tmpl->id.spi && |
bd55775c | 835 | (x0 = __xfrm_state_lookup(net, mark, daddr, tmpl->id.spi, |
8444cf71 | 836 | tmpl->id.proto, encap_family)) != NULL) { |
37b08e34 | 837 | to_put = x0; |
1da177e4 LT |
838 | error = -EEXIST; |
839 | goto out; | |
840 | } | |
0f24558e HG |
841 | |
842 | c.net = net; | |
843 | /* If the KMs have no listeners (yet...), avoid allocating an SA | |
844 | * for each and every packet - garbage collection might not | |
845 | * handle the flood. | |
846 | */ | |
847 | if (!km_is_alive(&c)) { | |
848 | error = -ESRCH; | |
849 | goto out; | |
850 | } | |
851 | ||
5447c5e4 | 852 | x = xfrm_state_alloc(net); |
1da177e4 LT |
853 | if (x == NULL) { |
854 | error = -ENOMEM; | |
855 | goto out; | |
856 | } | |
8444cf71 | 857 | /* Initialize temporary state matching only |
1da177e4 | 858 | * to current session. */ |
8444cf71 | 859 | xfrm_init_tempstate(x, fl, tmpl, daddr, saddr, family); |
bd55775c | 860 | memcpy(&x->mark, &pol->mark, sizeof(x->mark)); |
1da177e4 | 861 | |
1d28f42c | 862 | error = security_xfrm_state_alloc_acquire(x, pol->security, fl->flowi_secid); |
e0d1caa7 VY |
863 | if (error) { |
864 | x->km.state = XFRM_STATE_DEAD; | |
37b08e34 | 865 | to_put = x; |
e0d1caa7 VY |
866 | x = NULL; |
867 | goto out; | |
868 | } | |
869 | ||
1da177e4 LT |
870 | if (km_query(x, tmpl, pol) == 0) { |
871 | x->km.state = XFRM_STATE_ACQ; | |
5447c5e4 | 872 | list_add(&x->km.all, &net->xfrm.state_all); |
ae3fb6d3 | 873 | hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h); |
8444cf71 | 874 | h = xfrm_src_hash(net, daddr, saddr, encap_family); |
ae3fb6d3 | 875 | hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h); |
1da177e4 | 876 | if (x->id.spi) { |
8444cf71 | 877 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, encap_family); |
ae3fb6d3 | 878 | hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h); |
1da177e4 | 879 | } |
b27aeadb | 880 | x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires; |
9e0d57fd | 881 | tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL); |
5447c5e4 AD |
882 | net->xfrm.state_num++; |
883 | xfrm_hash_grow_check(net, x->bydst.next != NULL); | |
1da177e4 LT |
884 | } else { |
885 | x->km.state = XFRM_STATE_DEAD; | |
37b08e34 | 886 | to_put = x; |
1da177e4 LT |
887 | x = NULL; |
888 | error = -ESRCH; | |
889 | } | |
890 | } | |
891 | out: | |
02efdff7 FW |
892 | if (x) { |
893 | if (!xfrm_state_hold_rcu(x)) { | |
894 | *err = -EAGAIN; | |
895 | x = NULL; | |
896 | } | |
897 | } else { | |
1da177e4 | 898 | *err = acquire_in_progress ? -EAGAIN : error; |
02efdff7 | 899 | } |
283bc9f3 | 900 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
37b08e34 DM |
901 | if (to_put) |
902 | xfrm_state_put(to_put); | |
b65e3d7b FW |
903 | |
904 | if (read_seqcount_retry(&xfrm_state_hash_generation, sequence)) { | |
905 | *err = -EAGAIN; | |
906 | if (x) { | |
907 | xfrm_state_put(x); | |
908 | x = NULL; | |
909 | } | |
910 | } | |
911 | ||
1da177e4 LT |
912 | return x; |
913 | } | |
914 | ||
628529b6 | 915 | struct xfrm_state * |
bd55775c | 916 | xfrm_stateonly_find(struct net *net, u32 mark, |
5447c5e4 | 917 | xfrm_address_t *daddr, xfrm_address_t *saddr, |
628529b6 JHS |
918 | unsigned short family, u8 mode, u8 proto, u32 reqid) |
919 | { | |
4bda4f25 | 920 | unsigned int h; |
628529b6 | 921 | struct xfrm_state *rx = NULL, *x = NULL; |
628529b6 | 922 | |
4ae770bf | 923 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
5447c5e4 | 924 | h = xfrm_dst_hash(net, daddr, saddr, reqid, family); |
b67bfe0d | 925 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
628529b6 JHS |
926 | if (x->props.family == family && |
927 | x->props.reqid == reqid && | |
3d6acfa7 | 928 | (mark & x->mark.m) == x->mark.v && |
628529b6 JHS |
929 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
930 | xfrm_state_addr_check(x, daddr, saddr, family) && | |
931 | mode == x->props.mode && | |
932 | proto == x->id.proto && | |
933 | x->km.state == XFRM_STATE_VALID) { | |
934 | rx = x; | |
935 | break; | |
936 | } | |
937 | } | |
938 | ||
939 | if (rx) | |
940 | xfrm_state_hold(rx); | |
4ae770bf | 941 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
628529b6 JHS |
942 | |
943 | ||
944 | return rx; | |
945 | } | |
946 | EXPORT_SYMBOL(xfrm_stateonly_find); | |
947 | ||
c454997e FD |
948 | struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi, |
949 | unsigned short family) | |
950 | { | |
951 | struct xfrm_state *x; | |
952 | struct xfrm_state_walk *w; | |
953 | ||
954 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
955 | list_for_each_entry(w, &net->xfrm.state_all, all) { | |
956 | x = container_of(w, struct xfrm_state, km); | |
957 | if (x->props.family != family || | |
958 | x->id.spi != spi) | |
959 | continue; | |
960 | ||
c454997e | 961 | xfrm_state_hold(x); |
bdddbf69 | 962 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
c454997e FD |
963 | return x; |
964 | } | |
965 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); | |
966 | return NULL; | |
967 | } | |
968 | EXPORT_SYMBOL(xfrm_state_lookup_byspi); | |
969 | ||
1da177e4 LT |
970 | static void __xfrm_state_insert(struct xfrm_state *x) |
971 | { | |
98806f75 | 972 | struct net *net = xs_net(x); |
a624c108 | 973 | unsigned int h; |
1da177e4 | 974 | |
98806f75 | 975 | list_add(&x->km.all, &net->xfrm.state_all); |
4c563f76 | 976 | |
98806f75 | 977 | h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr, |
c1969f29 | 978 | x->props.reqid, x->props.family); |
ae3fb6d3 | 979 | hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h); |
1da177e4 | 980 | |
98806f75 | 981 | h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family); |
ae3fb6d3 | 982 | hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h); |
1da177e4 | 983 | |
7b4dc360 | 984 | if (x->id.spi) { |
98806f75 | 985 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, |
6c44e6b7 MN |
986 | x->props.family); |
987 | ||
ae3fb6d3 | 988 | hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h); |
6c44e6b7 MN |
989 | } |
990 | ||
9e0d57fd | 991 | tasklet_hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL); |
a47f0ce0 DM |
992 | if (x->replay_maxage) |
993 | mod_timer(&x->rtimer, jiffies + x->replay_maxage); | |
f8cd5488 | 994 | |
98806f75 | 995 | net->xfrm.state_num++; |
f034b5d4 | 996 | |
98806f75 | 997 | xfrm_hash_grow_check(net, x->bydst.next != NULL); |
1da177e4 LT |
998 | } |
999 | ||
283bc9f3 | 1000 | /* net->xfrm.xfrm_state_lock is held */ |
c7f5ea3a DM |
1001 | static void __xfrm_state_bump_genids(struct xfrm_state *xnew) |
1002 | { | |
98806f75 | 1003 | struct net *net = xs_net(xnew); |
c7f5ea3a DM |
1004 | unsigned short family = xnew->props.family; |
1005 | u32 reqid = xnew->props.reqid; | |
1006 | struct xfrm_state *x; | |
c7f5ea3a | 1007 | unsigned int h; |
3d6acfa7 | 1008 | u32 mark = xnew->mark.v & xnew->mark.m; |
c7f5ea3a | 1009 | |
98806f75 | 1010 | h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family); |
b67bfe0d | 1011 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
c7f5ea3a DM |
1012 | if (x->props.family == family && |
1013 | x->props.reqid == reqid && | |
3d6acfa7 | 1014 | (mark & x->mark.m) == x->mark.v && |
70e94e66 YH |
1015 | xfrm_addr_equal(&x->id.daddr, &xnew->id.daddr, family) && |
1016 | xfrm_addr_equal(&x->props.saddr, &xnew->props.saddr, family)) | |
34996cb9 | 1017 | x->genid++; |
c7f5ea3a DM |
1018 | } |
1019 | } | |
1020 | ||
1da177e4 LT |
1021 | void xfrm_state_insert(struct xfrm_state *x) |
1022 | { | |
283bc9f3 FD |
1023 | struct net *net = xs_net(x); |
1024 | ||
1025 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
c7f5ea3a | 1026 | __xfrm_state_bump_genids(x); |
1da177e4 | 1027 | __xfrm_state_insert(x); |
283bc9f3 | 1028 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1029 | } |
1030 | EXPORT_SYMBOL(xfrm_state_insert); | |
1031 | ||
283bc9f3 | 1032 | /* net->xfrm.xfrm_state_lock is held */ |
e473fcb4 MK |
1033 | static struct xfrm_state *__find_acq_core(struct net *net, |
1034 | const struct xfrm_mark *m, | |
a70486f0 DM |
1035 | unsigned short family, u8 mode, |
1036 | u32 reqid, u8 proto, | |
1037 | const xfrm_address_t *daddr, | |
e473fcb4 MK |
1038 | const xfrm_address_t *saddr, |
1039 | int create) | |
2770834c | 1040 | { |
5447c5e4 | 1041 | unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family); |
2770834c | 1042 | struct xfrm_state *x; |
3d6acfa7 | 1043 | u32 mark = m->v & m->m; |
2770834c | 1044 | |
b67bfe0d | 1045 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
2770834c DM |
1046 | if (x->props.reqid != reqid || |
1047 | x->props.mode != mode || | |
1048 | x->props.family != family || | |
1049 | x->km.state != XFRM_STATE_ACQ || | |
75e252d9 | 1050 | x->id.spi != 0 || |
1802571b | 1051 | x->id.proto != proto || |
3d6acfa7 | 1052 | (mark & x->mark.m) != x->mark.v || |
70e94e66 YH |
1053 | !xfrm_addr_equal(&x->id.daddr, daddr, family) || |
1054 | !xfrm_addr_equal(&x->props.saddr, saddr, family)) | |
2770834c DM |
1055 | continue; |
1056 | ||
2770834c DM |
1057 | xfrm_state_hold(x); |
1058 | return x; | |
1059 | } | |
1060 | ||
1061 | if (!create) | |
1062 | return NULL; | |
1063 | ||
5447c5e4 | 1064 | x = xfrm_state_alloc(net); |
2770834c DM |
1065 | if (likely(x)) { |
1066 | switch (family) { | |
1067 | case AF_INET: | |
1068 | x->sel.daddr.a4 = daddr->a4; | |
1069 | x->sel.saddr.a4 = saddr->a4; | |
1070 | x->sel.prefixlen_d = 32; | |
1071 | x->sel.prefixlen_s = 32; | |
1072 | x->props.saddr.a4 = saddr->a4; | |
1073 | x->id.daddr.a4 = daddr->a4; | |
1074 | break; | |
1075 | ||
1076 | case AF_INET6: | |
15e318bd JB |
1077 | x->sel.daddr.in6 = daddr->in6; |
1078 | x->sel.saddr.in6 = saddr->in6; | |
2770834c DM |
1079 | x->sel.prefixlen_d = 128; |
1080 | x->sel.prefixlen_s = 128; | |
15e318bd JB |
1081 | x->props.saddr.in6 = saddr->in6; |
1082 | x->id.daddr.in6 = daddr->in6; | |
2770834c | 1083 | break; |
3ff50b79 | 1084 | } |
2770834c DM |
1085 | |
1086 | x->km.state = XFRM_STATE_ACQ; | |
1087 | x->id.proto = proto; | |
1088 | x->props.family = family; | |
1089 | x->props.mode = mode; | |
1090 | x->props.reqid = reqid; | |
bd55775c JHS |
1091 | x->mark.v = m->v; |
1092 | x->mark.m = m->m; | |
b27aeadb | 1093 | x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires; |
2770834c | 1094 | xfrm_state_hold(x); |
9e0d57fd | 1095 | tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL); |
5447c5e4 | 1096 | list_add(&x->km.all, &net->xfrm.state_all); |
ae3fb6d3 | 1097 | hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h); |
5447c5e4 | 1098 | h = xfrm_src_hash(net, daddr, saddr, family); |
ae3fb6d3 | 1099 | hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h); |
918049f0 | 1100 | |
5447c5e4 | 1101 | net->xfrm.state_num++; |
918049f0 | 1102 | |
5447c5e4 | 1103 | xfrm_hash_grow_check(net, x->bydst.next != NULL); |
2770834c DM |
1104 | } |
1105 | ||
1106 | return x; | |
1107 | } | |
1108 | ||
bd55775c | 1109 | static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); |
1da177e4 LT |
1110 | |
1111 | int xfrm_state_add(struct xfrm_state *x) | |
1112 | { | |
5447c5e4 | 1113 | struct net *net = xs_net(x); |
37b08e34 | 1114 | struct xfrm_state *x1, *to_put; |
1da177e4 LT |
1115 | int family; |
1116 | int err; | |
bd55775c | 1117 | u32 mark = x->mark.v & x->mark.m; |
eb2971b6 | 1118 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
1da177e4 LT |
1119 | |
1120 | family = x->props.family; | |
1da177e4 | 1121 | |
37b08e34 DM |
1122 | to_put = NULL; |
1123 | ||
283bc9f3 | 1124 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 1125 | |
edcd5821 | 1126 | x1 = __xfrm_state_locate(x, use_spi, family); |
1da177e4 | 1127 | if (x1) { |
37b08e34 | 1128 | to_put = x1; |
1da177e4 LT |
1129 | x1 = NULL; |
1130 | err = -EEXIST; | |
1131 | goto out; | |
1132 | } | |
1133 | ||
eb2971b6 | 1134 | if (use_spi && x->km.seq) { |
bd55775c | 1135 | x1 = __xfrm_find_acq_byseq(net, mark, x->km.seq); |
75e252d9 | 1136 | if (x1 && ((x1->id.proto != x->id.proto) || |
70e94e66 | 1137 | !xfrm_addr_equal(&x1->id.daddr, &x->id.daddr, family))) { |
37b08e34 | 1138 | to_put = x1; |
1da177e4 LT |
1139 | x1 = NULL; |
1140 | } | |
1141 | } | |
1142 | ||
eb2971b6 | 1143 | if (use_spi && !x1) |
bd55775c JHS |
1144 | x1 = __find_acq_core(net, &x->mark, family, x->props.mode, |
1145 | x->props.reqid, x->id.proto, | |
2770834c | 1146 | &x->id.daddr, &x->props.saddr, 0); |
1da177e4 | 1147 | |
c7f5ea3a | 1148 | __xfrm_state_bump_genids(x); |
1da177e4 LT |
1149 | __xfrm_state_insert(x); |
1150 | err = 0; | |
1151 | ||
1152 | out: | |
283bc9f3 | 1153 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1154 | |
1155 | if (x1) { | |
1156 | xfrm_state_delete(x1); | |
1157 | xfrm_state_put(x1); | |
1158 | } | |
1159 | ||
37b08e34 DM |
1160 | if (to_put) |
1161 | xfrm_state_put(to_put); | |
1162 | ||
1da177e4 LT |
1163 | return err; |
1164 | } | |
1165 | EXPORT_SYMBOL(xfrm_state_add); | |
1166 | ||
80c9abaa | 1167 | #ifdef CONFIG_XFRM_MIGRATE |
cc9ab60e | 1168 | static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig) |
80c9abaa | 1169 | { |
98806f75 | 1170 | struct net *net = xs_net(orig); |
98806f75 | 1171 | struct xfrm_state *x = xfrm_state_alloc(net); |
80c9abaa | 1172 | if (!x) |
553f9118 | 1173 | goto out; |
80c9abaa SS |
1174 | |
1175 | memcpy(&x->id, &orig->id, sizeof(x->id)); | |
1176 | memcpy(&x->sel, &orig->sel, sizeof(x->sel)); | |
1177 | memcpy(&x->lft, &orig->lft, sizeof(x->lft)); | |
1178 | x->props.mode = orig->props.mode; | |
1179 | x->props.replay_window = orig->props.replay_window; | |
1180 | x->props.reqid = orig->props.reqid; | |
1181 | x->props.family = orig->props.family; | |
1182 | x->props.saddr = orig->props.saddr; | |
1183 | ||
1184 | if (orig->aalg) { | |
4447bb33 | 1185 | x->aalg = xfrm_algo_auth_clone(orig->aalg); |
80c9abaa SS |
1186 | if (!x->aalg) |
1187 | goto error; | |
1188 | } | |
1189 | x->props.aalgo = orig->props.aalgo; | |
1190 | ||
ee5c2317 SK |
1191 | if (orig->aead) { |
1192 | x->aead = xfrm_algo_aead_clone(orig->aead); | |
1193 | if (!x->aead) | |
1194 | goto error; | |
1195 | } | |
80c9abaa SS |
1196 | if (orig->ealg) { |
1197 | x->ealg = xfrm_algo_clone(orig->ealg); | |
1198 | if (!x->ealg) | |
1199 | goto error; | |
1200 | } | |
1201 | x->props.ealgo = orig->props.ealgo; | |
1202 | ||
1203 | if (orig->calg) { | |
1204 | x->calg = xfrm_algo_clone(orig->calg); | |
1205 | if (!x->calg) | |
1206 | goto error; | |
1207 | } | |
1208 | x->props.calgo = orig->props.calgo; | |
1209 | ||
a716c119 | 1210 | if (orig->encap) { |
80c9abaa SS |
1211 | x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL); |
1212 | if (!x->encap) | |
1213 | goto error; | |
1214 | } | |
1215 | ||
1216 | if (orig->coaddr) { | |
1217 | x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr), | |
1218 | GFP_KERNEL); | |
1219 | if (!x->coaddr) | |
1220 | goto error; | |
1221 | } | |
1222 | ||
af2f464e | 1223 | if (orig->replay_esn) { |
cc9ab60e | 1224 | if (xfrm_replay_clone(x, orig)) |
af2f464e SK |
1225 | goto error; |
1226 | } | |
1227 | ||
bd55775c JHS |
1228 | memcpy(&x->mark, &orig->mark, sizeof(x->mark)); |
1229 | ||
cc9ab60e | 1230 | if (xfrm_init_state(x) < 0) |
80c9abaa SS |
1231 | goto error; |
1232 | ||
1233 | x->props.flags = orig->props.flags; | |
a947b0a9 | 1234 | x->props.extra_flags = orig->props.extra_flags; |
80c9abaa | 1235 | |
ee5c2317 SK |
1236 | x->tfcpad = orig->tfcpad; |
1237 | x->replay_maxdiff = orig->replay_maxdiff; | |
1238 | x->replay_maxage = orig->replay_maxage; | |
80c9abaa SS |
1239 | x->curlft.add_time = orig->curlft.add_time; |
1240 | x->km.state = orig->km.state; | |
1241 | x->km.seq = orig->km.seq; | |
1242 | ||
1243 | return x; | |
1244 | ||
1245 | error: | |
553f9118 HX |
1246 | xfrm_state_put(x); |
1247 | out: | |
80c9abaa SS |
1248 | return NULL; |
1249 | } | |
80c9abaa | 1250 | |
283bc9f3 | 1251 | struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net) |
80c9abaa SS |
1252 | { |
1253 | unsigned int h; | |
8c0cba22 SK |
1254 | struct xfrm_state *x = NULL; |
1255 | ||
1256 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
80c9abaa SS |
1257 | |
1258 | if (m->reqid) { | |
283bc9f3 | 1259 | h = xfrm_dst_hash(net, &m->old_daddr, &m->old_saddr, |
80c9abaa | 1260 | m->reqid, m->old_family); |
283bc9f3 | 1261 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
80c9abaa SS |
1262 | if (x->props.mode != m->mode || |
1263 | x->id.proto != m->proto) | |
1264 | continue; | |
1265 | if (m->reqid && x->props.reqid != m->reqid) | |
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 | } else { | |
283bc9f3 | 1276 | h = xfrm_src_hash(net, &m->old_daddr, &m->old_saddr, |
80c9abaa | 1277 | m->old_family); |
283bc9f3 | 1278 | hlist_for_each_entry(x, net->xfrm.state_bysrc+h, bysrc) { |
80c9abaa SS |
1279 | if (x->props.mode != m->mode || |
1280 | x->id.proto != m->proto) | |
1281 | continue; | |
70e94e66 YH |
1282 | if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr, |
1283 | m->old_family) || | |
1284 | !xfrm_addr_equal(&x->props.saddr, &m->old_saddr, | |
1285 | m->old_family)) | |
80c9abaa SS |
1286 | continue; |
1287 | xfrm_state_hold(x); | |
8c0cba22 | 1288 | break; |
80c9abaa SS |
1289 | } |
1290 | } | |
1291 | ||
8c0cba22 SK |
1292 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1293 | ||
1294 | return x; | |
80c9abaa SS |
1295 | } |
1296 | EXPORT_SYMBOL(xfrm_migrate_state_find); | |
1297 | ||
3e94c2dc WC |
1298 | struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, |
1299 | struct xfrm_migrate *m) | |
80c9abaa SS |
1300 | { |
1301 | struct xfrm_state *xc; | |
80c9abaa | 1302 | |
cc9ab60e | 1303 | xc = xfrm_state_clone(x); |
80c9abaa SS |
1304 | if (!xc) |
1305 | return NULL; | |
1306 | ||
1307 | memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr)); | |
1308 | memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr)); | |
1309 | ||
1310 | /* add state */ | |
70e94e66 | 1311 | if (xfrm_addr_equal(&x->id.daddr, &m->new_daddr, m->new_family)) { |
80c9abaa SS |
1312 | /* a care is needed when the destination address of the |
1313 | state is to be updated as it is a part of triplet */ | |
1314 | xfrm_state_insert(xc); | |
1315 | } else { | |
cc9ab60e | 1316 | if (xfrm_state_add(xc) < 0) |
80c9abaa SS |
1317 | goto error; |
1318 | } | |
1319 | ||
1320 | return xc; | |
1321 | error: | |
78347c8c | 1322 | xfrm_state_put(xc); |
80c9abaa SS |
1323 | return NULL; |
1324 | } | |
1325 | EXPORT_SYMBOL(xfrm_state_migrate); | |
1326 | #endif | |
1327 | ||
1da177e4 LT |
1328 | int xfrm_state_update(struct xfrm_state *x) |
1329 | { | |
37b08e34 | 1330 | struct xfrm_state *x1, *to_put; |
1da177e4 | 1331 | int err; |
eb2971b6 | 1332 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
283bc9f3 | 1333 | struct net *net = xs_net(x); |
1da177e4 | 1334 | |
37b08e34 DM |
1335 | to_put = NULL; |
1336 | ||
283bc9f3 | 1337 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
edcd5821 | 1338 | x1 = __xfrm_state_locate(x, use_spi, x->props.family); |
1da177e4 LT |
1339 | |
1340 | err = -ESRCH; | |
1341 | if (!x1) | |
1342 | goto out; | |
1343 | ||
1344 | if (xfrm_state_kern(x1)) { | |
37b08e34 | 1345 | to_put = x1; |
1da177e4 LT |
1346 | err = -EEXIST; |
1347 | goto out; | |
1348 | } | |
1349 | ||
1350 | if (x1->km.state == XFRM_STATE_ACQ) { | |
1351 | __xfrm_state_insert(x); | |
1352 | x = NULL; | |
1353 | } | |
1354 | err = 0; | |
1355 | ||
1356 | out: | |
283bc9f3 | 1357 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 1358 | |
37b08e34 DM |
1359 | if (to_put) |
1360 | xfrm_state_put(to_put); | |
1361 | ||
1da177e4 LT |
1362 | if (err) |
1363 | return err; | |
1364 | ||
1365 | if (!x) { | |
1366 | xfrm_state_delete(x1); | |
1367 | xfrm_state_put(x1); | |
1368 | return 0; | |
1369 | } | |
1370 | ||
1371 | err = -EINVAL; | |
1372 | spin_lock_bh(&x1->lock); | |
1373 | if (likely(x1->km.state == XFRM_STATE_VALID)) { | |
1374 | if (x->encap && x1->encap) | |
1375 | memcpy(x1->encap, x->encap, sizeof(*x1->encap)); | |
060f02a3 NT |
1376 | if (x->coaddr && x1->coaddr) { |
1377 | memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr)); | |
1378 | } | |
1379 | if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel))) | |
1380 | memcpy(&x1->sel, &x->sel, sizeof(x1->sel)); | |
1da177e4 LT |
1381 | memcpy(&x1->lft, &x->lft, sizeof(x1->lft)); |
1382 | x1->km.dying = 0; | |
1383 | ||
9e0d57fd | 1384 | tasklet_hrtimer_start(&x1->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL); |
1da177e4 LT |
1385 | if (x1->curlft.use_time) |
1386 | xfrm_state_check_expire(x1); | |
1387 | ||
1388 | err = 0; | |
8fcbc637 TG |
1389 | x->km.state = XFRM_STATE_DEAD; |
1390 | __xfrm_state_put(x); | |
1da177e4 LT |
1391 | } |
1392 | spin_unlock_bh(&x1->lock); | |
1393 | ||
1394 | xfrm_state_put(x1); | |
1395 | ||
1396 | return err; | |
1397 | } | |
1398 | EXPORT_SYMBOL(xfrm_state_update); | |
1399 | ||
1400 | int xfrm_state_check_expire(struct xfrm_state *x) | |
1401 | { | |
1402 | if (!x->curlft.use_time) | |
9d729f72 | 1403 | x->curlft.use_time = get_seconds(); |
1da177e4 | 1404 | |
1da177e4 LT |
1405 | if (x->curlft.bytes >= x->lft.hard_byte_limit || |
1406 | x->curlft.packets >= x->lft.hard_packet_limit) { | |
4666faab | 1407 | x->km.state = XFRM_STATE_EXPIRED; |
9b7a787d | 1408 | tasklet_hrtimer_start(&x->mtimer, ktime_set(0, 0), HRTIMER_MODE_REL); |
1da177e4 LT |
1409 | return -EINVAL; |
1410 | } | |
1411 | ||
1412 | if (!x->km.dying && | |
1413 | (x->curlft.bytes >= x->lft.soft_byte_limit || | |
4666faab HX |
1414 | x->curlft.packets >= x->lft.soft_packet_limit)) { |
1415 | x->km.dying = 1; | |
53bc6b4d | 1416 | km_state_expired(x, 0, 0); |
4666faab | 1417 | } |
1da177e4 LT |
1418 | return 0; |
1419 | } | |
1420 | EXPORT_SYMBOL(xfrm_state_check_expire); | |
1421 | ||
1da177e4 | 1422 | struct xfrm_state * |
a70486f0 | 1423 | xfrm_state_lookup(struct net *net, u32 mark, const xfrm_address_t *daddr, __be32 spi, |
bd55775c | 1424 | u8 proto, unsigned short family) |
1da177e4 LT |
1425 | { |
1426 | struct xfrm_state *x; | |
1da177e4 | 1427 | |
283bc9f3 | 1428 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1429 | x = __xfrm_state_lookup(net, mark, daddr, spi, proto, family); |
283bc9f3 | 1430 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1431 | return x; |
1432 | } | |
1433 | EXPORT_SYMBOL(xfrm_state_lookup); | |
1434 | ||
1435 | struct xfrm_state * | |
bd55775c | 1436 | xfrm_state_lookup_byaddr(struct net *net, u32 mark, |
a70486f0 | 1437 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
eb2971b6 MN |
1438 | u8 proto, unsigned short family) |
1439 | { | |
1440 | struct xfrm_state *x; | |
eb2971b6 | 1441 | |
283bc9f3 | 1442 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1443 | x = __xfrm_state_lookup_byaddr(net, mark, daddr, saddr, proto, family); |
283bc9f3 | 1444 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
eb2971b6 MN |
1445 | return x; |
1446 | } | |
1447 | EXPORT_SYMBOL(xfrm_state_lookup_byaddr); | |
1448 | ||
1449 | struct xfrm_state * | |
e473fcb4 MK |
1450 | xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, u8 mode, u32 reqid, |
1451 | u8 proto, const xfrm_address_t *daddr, | |
1452 | const xfrm_address_t *saddr, int create, unsigned short family) | |
1da177e4 LT |
1453 | { |
1454 | struct xfrm_state *x; | |
1da177e4 | 1455 | |
283bc9f3 | 1456 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1457 | x = __find_acq_core(net, mark, family, mode, reqid, proto, daddr, saddr, create); |
283bc9f3 | 1458 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
2770834c | 1459 | |
1da177e4 LT |
1460 | return x; |
1461 | } | |
1462 | EXPORT_SYMBOL(xfrm_find_acq); | |
1463 | ||
41a49cc3 MN |
1464 | #ifdef CONFIG_XFRM_SUB_POLICY |
1465 | int | |
1466 | xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, | |
283bc9f3 | 1467 | unsigned short family, struct net *net) |
41a49cc3 MN |
1468 | { |
1469 | int err = 0; | |
1470 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
1471 | if (!afinfo) | |
1472 | return -EAFNOSUPPORT; | |
1473 | ||
283bc9f3 | 1474 | spin_lock_bh(&net->xfrm.xfrm_state_lock); /*FIXME*/ |
41a49cc3 MN |
1475 | if (afinfo->tmpl_sort) |
1476 | err = afinfo->tmpl_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_tmpl_sort); | |
1482 | ||
1483 | int | |
1484 | xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, | |
1485 | unsigned short family) | |
1486 | { | |
1487 | int err = 0; | |
1488 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
35ea790d | 1489 | struct net *net = xs_net(*src); |
283bc9f3 | 1490 | |
41a49cc3 MN |
1491 | if (!afinfo) |
1492 | return -EAFNOSUPPORT; | |
1493 | ||
283bc9f3 | 1494 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
41a49cc3 MN |
1495 | if (afinfo->state_sort) |
1496 | err = afinfo->state_sort(dst, src, n); | |
283bc9f3 | 1497 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
41a49cc3 MN |
1498 | xfrm_state_put_afinfo(afinfo); |
1499 | return err; | |
1500 | } | |
1501 | EXPORT_SYMBOL(xfrm_state_sort); | |
1502 | #endif | |
1503 | ||
1da177e4 LT |
1504 | /* Silly enough, but I'm lazy to build resolution list */ |
1505 | ||
bd55775c | 1506 | static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq) |
1da177e4 LT |
1507 | { |
1508 | int i; | |
1da177e4 | 1509 | |
5447c5e4 | 1510 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
8f126e37 DM |
1511 | struct xfrm_state *x; |
1512 | ||
b67bfe0d | 1513 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
8f126e37 | 1514 | if (x->km.seq == seq && |
3d6acfa7 | 1515 | (mark & x->mark.m) == x->mark.v && |
8f126e37 | 1516 | x->km.state == XFRM_STATE_ACQ) { |
1da177e4 LT |
1517 | xfrm_state_hold(x); |
1518 | return x; | |
1519 | } | |
1520 | } | |
1521 | } | |
1522 | return NULL; | |
1523 | } | |
1524 | ||
bd55775c | 1525 | struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq) |
1da177e4 LT |
1526 | { |
1527 | struct xfrm_state *x; | |
1528 | ||
283bc9f3 | 1529 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1530 | x = __xfrm_find_acq_byseq(net, mark, seq); |
283bc9f3 | 1531 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1532 | return x; |
1533 | } | |
1534 | EXPORT_SYMBOL(xfrm_find_acq_byseq); | |
1535 | ||
1536 | u32 xfrm_get_acqseq(void) | |
1537 | { | |
1538 | u32 res; | |
6836b9bd | 1539 | static atomic_t acqseq; |
1540 | ||
1541 | do { | |
1542 | res = atomic_inc_return(&acqseq); | |
1543 | } while (!res); | |
1da177e4 | 1544 | |
1da177e4 LT |
1545 | return res; |
1546 | } | |
1547 | EXPORT_SYMBOL(xfrm_get_acqseq); | |
1548 | ||
776e9dd9 FD |
1549 | int verify_spi_info(u8 proto, u32 min, u32 max) |
1550 | { | |
1551 | switch (proto) { | |
1552 | case IPPROTO_AH: | |
1553 | case IPPROTO_ESP: | |
1554 | break; | |
1555 | ||
1556 | case IPPROTO_COMP: | |
1557 | /* IPCOMP spi is 16-bits. */ | |
1558 | if (max >= 0x10000) | |
1559 | return -EINVAL; | |
1560 | break; | |
1561 | ||
1562 | default: | |
1563 | return -EINVAL; | |
1564 | } | |
1565 | ||
1566 | if (min > max) | |
1567 | return -EINVAL; | |
1568 | ||
1569 | return 0; | |
1570 | } | |
1571 | EXPORT_SYMBOL(verify_spi_info); | |
1572 | ||
658b219e | 1573 | int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high) |
1da177e4 | 1574 | { |
221df1ed | 1575 | struct net *net = xs_net(x); |
f034b5d4 | 1576 | unsigned int h; |
1da177e4 | 1577 | struct xfrm_state *x0; |
658b219e HX |
1578 | int err = -ENOENT; |
1579 | __be32 minspi = htonl(low); | |
1580 | __be32 maxspi = htonl(high); | |
bd55775c | 1581 | u32 mark = x->mark.v & x->mark.m; |
1da177e4 | 1582 | |
658b219e HX |
1583 | spin_lock_bh(&x->lock); |
1584 | if (x->km.state == XFRM_STATE_DEAD) | |
1585 | goto unlock; | |
1586 | ||
1587 | err = 0; | |
1da177e4 | 1588 | if (x->id.spi) |
658b219e HX |
1589 | goto unlock; |
1590 | ||
1591 | err = -ENOENT; | |
1da177e4 LT |
1592 | |
1593 | if (minspi == maxspi) { | |
bd55775c | 1594 | x0 = xfrm_state_lookup(net, mark, &x->id.daddr, minspi, x->id.proto, x->props.family); |
1da177e4 LT |
1595 | if (x0) { |
1596 | xfrm_state_put(x0); | |
658b219e | 1597 | goto unlock; |
1da177e4 LT |
1598 | } |
1599 | x->id.spi = minspi; | |
1600 | } else { | |
1601 | u32 spi = 0; | |
9b7a787d | 1602 | for (h = 0; h < high-low+1; h++) { |
63862b5b | 1603 | spi = low + prandom_u32()%(high-low+1); |
bd55775c | 1604 | x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family); |
1da177e4 LT |
1605 | if (x0 == NULL) { |
1606 | x->id.spi = htonl(spi); | |
1607 | break; | |
1608 | } | |
1609 | xfrm_state_put(x0); | |
1610 | } | |
1611 | } | |
1612 | if (x->id.spi) { | |
283bc9f3 | 1613 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12604d8a | 1614 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family); |
ae3fb6d3 | 1615 | hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h); |
283bc9f3 | 1616 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
658b219e HX |
1617 | |
1618 | err = 0; | |
1da177e4 | 1619 | } |
658b219e HX |
1620 | |
1621 | unlock: | |
1622 | spin_unlock_bh(&x->lock); | |
1623 | ||
1624 | return err; | |
1da177e4 LT |
1625 | } |
1626 | EXPORT_SYMBOL(xfrm_alloc_spi); | |
1627 | ||
d3623099 | 1628 | static bool __xfrm_state_filter_match(struct xfrm_state *x, |
870a2df4 | 1629 | struct xfrm_address_filter *filter) |
d3623099 ND |
1630 | { |
1631 | if (filter) { | |
1632 | if ((filter->family == AF_INET || | |
1633 | filter->family == AF_INET6) && | |
1634 | x->props.family != filter->family) | |
1635 | return false; | |
1636 | ||
1637 | return addr_match(&x->props.saddr, &filter->saddr, | |
1638 | filter->splen) && | |
1639 | addr_match(&x->id.daddr, &filter->daddr, | |
1640 | filter->dplen); | |
1641 | } | |
1642 | return true; | |
1643 | } | |
1644 | ||
284fa7da | 1645 | int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, |
4c563f76 | 1646 | int (*func)(struct xfrm_state *, int, void*), |
1da177e4 LT |
1647 | void *data) |
1648 | { | |
12a169e7 HX |
1649 | struct xfrm_state *state; |
1650 | struct xfrm_state_walk *x; | |
1da177e4 LT |
1651 | int err = 0; |
1652 | ||
12a169e7 | 1653 | if (walk->seq != 0 && list_empty(&walk->all)) |
4c563f76 TT |
1654 | return 0; |
1655 | ||
283bc9f3 | 1656 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12a169e7 | 1657 | if (list_empty(&walk->all)) |
284fa7da | 1658 | x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all); |
12a169e7 | 1659 | else |
80077702 | 1660 | x = list_first_entry(&walk->all, struct xfrm_state_walk, all); |
284fa7da | 1661 | list_for_each_entry_from(x, &net->xfrm.state_all, all) { |
12a169e7 | 1662 | if (x->state == XFRM_STATE_DEAD) |
4c563f76 | 1663 | continue; |
12a169e7 HX |
1664 | state = container_of(x, struct xfrm_state, km); |
1665 | if (!xfrm_id_proto_match(state->id.proto, walk->proto)) | |
4c563f76 | 1666 | continue; |
d3623099 ND |
1667 | if (!__xfrm_state_filter_match(state, walk->filter)) |
1668 | continue; | |
12a169e7 HX |
1669 | err = func(state, walk->seq, data); |
1670 | if (err) { | |
1671 | list_move_tail(&walk->all, &x->all); | |
1672 | goto out; | |
1da177e4 | 1673 | } |
12a169e7 | 1674 | walk->seq++; |
1da177e4 | 1675 | } |
12a169e7 | 1676 | if (walk->seq == 0) { |
1da177e4 LT |
1677 | err = -ENOENT; |
1678 | goto out; | |
1679 | } | |
12a169e7 | 1680 | list_del_init(&walk->all); |
1da177e4 | 1681 | out: |
283bc9f3 | 1682 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1683 | return err; |
1684 | } | |
1685 | EXPORT_SYMBOL(xfrm_state_walk); | |
1686 | ||
d3623099 | 1687 | void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto, |
870a2df4 | 1688 | struct xfrm_address_filter *filter) |
5c182458 | 1689 | { |
12a169e7 | 1690 | INIT_LIST_HEAD(&walk->all); |
5c182458 | 1691 | walk->proto = proto; |
12a169e7 HX |
1692 | walk->state = XFRM_STATE_DEAD; |
1693 | walk->seq = 0; | |
d3623099 | 1694 | walk->filter = filter; |
5c182458 HX |
1695 | } |
1696 | EXPORT_SYMBOL(xfrm_state_walk_init); | |
1697 | ||
283bc9f3 | 1698 | void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net) |
abb81c4f | 1699 | { |
d3623099 ND |
1700 | kfree(walk->filter); |
1701 | ||
12a169e7 | 1702 | if (list_empty(&walk->all)) |
5c182458 | 1703 | return; |
5c182458 | 1704 | |
283bc9f3 | 1705 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12a169e7 | 1706 | list_del(&walk->all); |
283bc9f3 | 1707 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
abb81c4f HX |
1708 | } |
1709 | EXPORT_SYMBOL(xfrm_state_walk_done); | |
1710 | ||
f8cd5488 JHS |
1711 | static void xfrm_replay_timer_handler(unsigned long data) |
1712 | { | |
3e94c2dc | 1713 | struct xfrm_state *x = (struct xfrm_state *)data; |
f8cd5488 JHS |
1714 | |
1715 | spin_lock(&x->lock); | |
1716 | ||
2717096a | 1717 | if (x->km.state == XFRM_STATE_VALID) { |
a6483b79 | 1718 | if (xfrm_aevent_is_on(xs_net(x))) |
9fdc4883 | 1719 | x->repl->notify(x, XFRM_REPLAY_TIMEOUT); |
2717096a JHS |
1720 | else |
1721 | x->xflags |= XFRM_TIME_DEFER; | |
1722 | } | |
f8cd5488 JHS |
1723 | |
1724 | spin_unlock(&x->lock); | |
1725 | } | |
1726 | ||
df01812e | 1727 | static LIST_HEAD(xfrm_km_list); |
1da177e4 | 1728 | |
214e005b | 1729 | void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
1da177e4 LT |
1730 | { |
1731 | struct xfrm_mgr *km; | |
1732 | ||
85168c00 CW |
1733 | rcu_read_lock(); |
1734 | list_for_each_entry_rcu(km, &xfrm_km_list, list) | |
26b15dad JHS |
1735 | if (km->notify_policy) |
1736 | km->notify_policy(xp, dir, c); | |
85168c00 | 1737 | rcu_read_unlock(); |
26b15dad | 1738 | } |
1da177e4 | 1739 | |
214e005b | 1740 | void km_state_notify(struct xfrm_state *x, const struct km_event *c) |
26b15dad JHS |
1741 | { |
1742 | struct xfrm_mgr *km; | |
85168c00 CW |
1743 | rcu_read_lock(); |
1744 | list_for_each_entry_rcu(km, &xfrm_km_list, list) | |
26b15dad JHS |
1745 | if (km->notify) |
1746 | km->notify(x, c); | |
85168c00 | 1747 | rcu_read_unlock(); |
26b15dad JHS |
1748 | } |
1749 | ||
1750 | EXPORT_SYMBOL(km_policy_notify); | |
1751 | EXPORT_SYMBOL(km_state_notify); | |
1752 | ||
15e47304 | 1753 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid) |
26b15dad JHS |
1754 | { |
1755 | struct km_event c; | |
1756 | ||
bf08867f | 1757 | c.data.hard = hard; |
15e47304 | 1758 | c.portid = portid; |
f60f6b8f | 1759 | c.event = XFRM_MSG_EXPIRE; |
26b15dad | 1760 | km_state_notify(x, &c); |
1da177e4 LT |
1761 | } |
1762 | ||
53bc6b4d | 1763 | EXPORT_SYMBOL(km_state_expired); |
26b15dad JHS |
1764 | /* |
1765 | * We send to all registered managers regardless of failure | |
1766 | * We are happy with one success | |
1767 | */ | |
980ebd25 | 1768 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol) |
1da177e4 | 1769 | { |
26b15dad | 1770 | int err = -EINVAL, acqret; |
1da177e4 LT |
1771 | struct xfrm_mgr *km; |
1772 | ||
85168c00 CW |
1773 | rcu_read_lock(); |
1774 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
65e0736b | 1775 | acqret = km->acquire(x, t, pol); |
26b15dad JHS |
1776 | if (!acqret) |
1777 | err = acqret; | |
1da177e4 | 1778 | } |
85168c00 | 1779 | rcu_read_unlock(); |
1da177e4 LT |
1780 | return err; |
1781 | } | |
980ebd25 | 1782 | EXPORT_SYMBOL(km_query); |
1da177e4 | 1783 | |
5d36b180 | 1784 | int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) |
1da177e4 LT |
1785 | { |
1786 | int err = -EINVAL; | |
1787 | struct xfrm_mgr *km; | |
1788 | ||
85168c00 CW |
1789 | rcu_read_lock(); |
1790 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
1da177e4 LT |
1791 | if (km->new_mapping) |
1792 | err = km->new_mapping(x, ipaddr, sport); | |
1793 | if (!err) | |
1794 | break; | |
1795 | } | |
85168c00 | 1796 | rcu_read_unlock(); |
1da177e4 LT |
1797 | return err; |
1798 | } | |
1799 | EXPORT_SYMBOL(km_new_mapping); | |
1800 | ||
15e47304 | 1801 | void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid) |
1da177e4 | 1802 | { |
26b15dad | 1803 | struct km_event c; |
1da177e4 | 1804 | |
bf08867f | 1805 | c.data.hard = hard; |
15e47304 | 1806 | c.portid = portid; |
f60f6b8f | 1807 | c.event = XFRM_MSG_POLEXPIRE; |
26b15dad | 1808 | km_policy_notify(pol, dir, &c); |
1da177e4 | 1809 | } |
a70fcb0b | 1810 | EXPORT_SYMBOL(km_policy_expired); |
1da177e4 | 1811 | |
2d60abc2 | 1812 | #ifdef CONFIG_XFRM_MIGRATE |
183cad12 DM |
1813 | int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1814 | const struct xfrm_migrate *m, int num_migrate, | |
1815 | const struct xfrm_kmaddress *k) | |
80c9abaa SS |
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) { | |
80c9abaa | 1823 | if (km->migrate) { |
13c1d189 | 1824 | ret = km->migrate(sel, dir, type, m, num_migrate, k); |
80c9abaa SS |
1825 | if (!ret) |
1826 | err = ret; | |
1827 | } | |
1828 | } | |
85168c00 | 1829 | rcu_read_unlock(); |
80c9abaa SS |
1830 | return err; |
1831 | } | |
1832 | EXPORT_SYMBOL(km_migrate); | |
2d60abc2 | 1833 | #endif |
80c9abaa | 1834 | |
db983c11 | 1835 | int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr) |
97a64b45 MN |
1836 | { |
1837 | int err = -EINVAL; | |
1838 | int ret; | |
1839 | struct xfrm_mgr *km; | |
1840 | ||
85168c00 CW |
1841 | rcu_read_lock(); |
1842 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
97a64b45 | 1843 | if (km->report) { |
db983c11 | 1844 | ret = km->report(net, proto, sel, addr); |
97a64b45 MN |
1845 | if (!ret) |
1846 | err = ret; | |
1847 | } | |
1848 | } | |
85168c00 | 1849 | rcu_read_unlock(); |
97a64b45 MN |
1850 | return err; |
1851 | } | |
1852 | EXPORT_SYMBOL(km_report); | |
1853 | ||
0f24558e HG |
1854 | bool km_is_alive(const struct km_event *c) |
1855 | { | |
1856 | struct xfrm_mgr *km; | |
1857 | bool is_alive = false; | |
1858 | ||
1859 | rcu_read_lock(); | |
1860 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
1861 | if (km->is_alive && km->is_alive(c)) { | |
1862 | is_alive = true; | |
1863 | break; | |
1864 | } | |
1865 | } | |
1866 | rcu_read_unlock(); | |
1867 | ||
1868 | return is_alive; | |
1869 | } | |
1870 | EXPORT_SYMBOL(km_is_alive); | |
1871 | ||
1da177e4 LT |
1872 | int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) |
1873 | { | |
1874 | int err; | |
1875 | u8 *data; | |
1876 | struct xfrm_mgr *km; | |
1877 | struct xfrm_policy *pol = NULL; | |
1878 | ||
1879 | if (optlen <= 0 || optlen > PAGE_SIZE) | |
1880 | return -EMSGSIZE; | |
1881 | ||
1882 | data = kmalloc(optlen, GFP_KERNEL); | |
1883 | if (!data) | |
1884 | return -ENOMEM; | |
1885 | ||
1886 | err = -EFAULT; | |
1887 | if (copy_from_user(data, optval, optlen)) | |
1888 | goto out; | |
1889 | ||
1890 | err = -EINVAL; | |
85168c00 CW |
1891 | rcu_read_lock(); |
1892 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
cb969f07 | 1893 | pol = km->compile_policy(sk, optname, data, |
1da177e4 LT |
1894 | optlen, &err); |
1895 | if (err >= 0) | |
1896 | break; | |
1897 | } | |
85168c00 | 1898 | rcu_read_unlock(); |
1da177e4 LT |
1899 | |
1900 | if (err >= 0) { | |
1901 | xfrm_sk_policy_insert(sk, err, pol); | |
1902 | xfrm_pol_put(pol); | |
1903 | err = 0; | |
1904 | } | |
1905 | ||
1906 | out: | |
1907 | kfree(data); | |
1908 | return err; | |
1909 | } | |
1910 | EXPORT_SYMBOL(xfrm_user_policy); | |
1911 | ||
85168c00 CW |
1912 | static DEFINE_SPINLOCK(xfrm_km_lock); |
1913 | ||
1da177e4 LT |
1914 | int xfrm_register_km(struct xfrm_mgr *km) |
1915 | { | |
85168c00 CW |
1916 | spin_lock_bh(&xfrm_km_lock); |
1917 | list_add_tail_rcu(&km->list, &xfrm_km_list); | |
1918 | spin_unlock_bh(&xfrm_km_lock); | |
1da177e4 LT |
1919 | return 0; |
1920 | } | |
1921 | EXPORT_SYMBOL(xfrm_register_km); | |
1922 | ||
1923 | int xfrm_unregister_km(struct xfrm_mgr *km) | |
1924 | { | |
85168c00 CW |
1925 | spin_lock_bh(&xfrm_km_lock); |
1926 | list_del_rcu(&km->list); | |
1927 | spin_unlock_bh(&xfrm_km_lock); | |
1928 | synchronize_rcu(); | |
1da177e4 LT |
1929 | return 0; |
1930 | } | |
1931 | EXPORT_SYMBOL(xfrm_unregister_km); | |
1932 | ||
1933 | int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo) | |
1934 | { | |
1935 | int err = 0; | |
1936 | if (unlikely(afinfo == NULL)) | |
1937 | return -EINVAL; | |
1938 | if (unlikely(afinfo->family >= NPROTO)) | |
1939 | return -EAFNOSUPPORT; | |
44abdc30 | 1940 | spin_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 | 1941 | if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL)) |
f31e8d4f | 1942 | err = -EEXIST; |
edcd5821 | 1943 | else |
44abdc30 CW |
1944 | rcu_assign_pointer(xfrm_state_afinfo[afinfo->family], afinfo); |
1945 | spin_unlock_bh(&xfrm_state_afinfo_lock); | |
1da177e4 LT |
1946 | return err; |
1947 | } | |
1948 | EXPORT_SYMBOL(xfrm_state_register_afinfo); | |
1949 | ||
1950 | int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo) | |
1951 | { | |
1952 | int err = 0; | |
1953 | if (unlikely(afinfo == NULL)) | |
1954 | return -EINVAL; | |
1955 | if (unlikely(afinfo->family >= NPROTO)) | |
1956 | return -EAFNOSUPPORT; | |
44abdc30 | 1957 | spin_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1958 | if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) { |
1959 | if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo)) | |
1960 | err = -EINVAL; | |
edcd5821 | 1961 | else |
44abdc30 | 1962 | RCU_INIT_POINTER(xfrm_state_afinfo[afinfo->family], NULL); |
1da177e4 | 1963 | } |
44abdc30 CW |
1964 | spin_unlock_bh(&xfrm_state_afinfo_lock); |
1965 | synchronize_rcu(); | |
1da177e4 LT |
1966 | return err; |
1967 | } | |
1968 | EXPORT_SYMBOL(xfrm_state_unregister_afinfo); | |
1969 | ||
628e341f | 1970 | struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family) |
1da177e4 LT |
1971 | { |
1972 | struct xfrm_state_afinfo *afinfo; | |
1973 | if (unlikely(family >= NPROTO)) | |
1974 | return NULL; | |
44abdc30 CW |
1975 | rcu_read_lock(); |
1976 | afinfo = rcu_dereference(xfrm_state_afinfo[family]); | |
546be240 | 1977 | if (unlikely(!afinfo)) |
44abdc30 | 1978 | rcu_read_unlock(); |
1da177e4 LT |
1979 | return afinfo; |
1980 | } | |
1981 | ||
628e341f | 1982 | void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo) |
1da177e4 | 1983 | { |
44abdc30 | 1984 | rcu_read_unlock(); |
1da177e4 LT |
1985 | } |
1986 | ||
1987 | /* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */ | |
1988 | void xfrm_state_delete_tunnel(struct xfrm_state *x) | |
1989 | { | |
1990 | if (x->tunnel) { | |
1991 | struct xfrm_state *t = x->tunnel; | |
1992 | ||
1993 | if (atomic_read(&t->tunnel_users) == 2) | |
1994 | xfrm_state_delete(t); | |
1995 | atomic_dec(&t->tunnel_users); | |
1996 | xfrm_state_put(t); | |
1997 | x->tunnel = NULL; | |
1998 | } | |
1999 | } | |
2000 | EXPORT_SYMBOL(xfrm_state_delete_tunnel); | |
2001 | ||
2002 | int xfrm_state_mtu(struct xfrm_state *x, int mtu) | |
2003 | { | |
c5c25238 | 2004 | int res; |
1da177e4 | 2005 | |
c5c25238 PM |
2006 | spin_lock_bh(&x->lock); |
2007 | if (x->km.state == XFRM_STATE_VALID && | |
2008 | x->type && x->type->get_mtu) | |
2009 | res = x->type->get_mtu(x, mtu); | |
2010 | else | |
28121617 | 2011 | res = mtu - x->props.header_len; |
c5c25238 | 2012 | spin_unlock_bh(&x->lock); |
1da177e4 LT |
2013 | return res; |
2014 | } | |
2015 | ||
a454f0cc | 2016 | int __xfrm_init_state(struct xfrm_state *x, bool init_replay) |
72cb6962 | 2017 | { |
d094cd83 | 2018 | struct xfrm_state_afinfo *afinfo; |
df9dcb45 | 2019 | struct xfrm_mode *inner_mode; |
d094cd83 | 2020 | int family = x->props.family; |
72cb6962 HX |
2021 | int err; |
2022 | ||
d094cd83 HX |
2023 | err = -EAFNOSUPPORT; |
2024 | afinfo = xfrm_state_get_afinfo(family); | |
2025 | if (!afinfo) | |
2026 | goto error; | |
2027 | ||
2028 | err = 0; | |
2029 | if (afinfo->init_flags) | |
2030 | err = afinfo->init_flags(x); | |
2031 | ||
2032 | xfrm_state_put_afinfo(afinfo); | |
2033 | ||
2034 | if (err) | |
2035 | goto error; | |
2036 | ||
2037 | err = -EPROTONOSUPPORT; | |
13996378 | 2038 | |
df9dcb45 KM |
2039 | if (x->sel.family != AF_UNSPEC) { |
2040 | inner_mode = xfrm_get_mode(x->props.mode, x->sel.family); | |
2041 | if (inner_mode == NULL) | |
2042 | goto error; | |
2043 | ||
2044 | if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) && | |
2045 | family != x->sel.family) { | |
2046 | xfrm_put_mode(inner_mode); | |
2047 | goto error; | |
2048 | } | |
2049 | ||
2050 | x->inner_mode = inner_mode; | |
2051 | } else { | |
2052 | struct xfrm_mode *inner_mode_iaf; | |
d81d2285 | 2053 | int iafamily = AF_INET; |
df9dcb45 | 2054 | |
d81d2285 | 2055 | inner_mode = xfrm_get_mode(x->props.mode, x->props.family); |
df9dcb45 KM |
2056 | if (inner_mode == NULL) |
2057 | goto error; | |
2058 | ||
2059 | if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) { | |
2060 | xfrm_put_mode(inner_mode); | |
2061 | goto error; | |
2062 | } | |
d81d2285 | 2063 | x->inner_mode = inner_mode; |
df9dcb45 | 2064 | |
d81d2285 MW |
2065 | if (x->props.family == AF_INET) |
2066 | iafamily = AF_INET6; | |
df9dcb45 | 2067 | |
d81d2285 MW |
2068 | inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily); |
2069 | if (inner_mode_iaf) { | |
2070 | if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL) | |
2071 | x->inner_mode_iaf = inner_mode_iaf; | |
2072 | else | |
2073 | xfrm_put_mode(inner_mode_iaf); | |
df9dcb45 KM |
2074 | } |
2075 | } | |
13996378 | 2076 | |
d094cd83 | 2077 | x->type = xfrm_get_type(x->id.proto, family); |
72cb6962 HX |
2078 | if (x->type == NULL) |
2079 | goto error; | |
2080 | ||
2081 | err = x->type->init_state(x); | |
2082 | if (err) | |
2083 | goto error; | |
2084 | ||
13996378 | 2085 | x->outer_mode = xfrm_get_mode(x->props.mode, family); |
599901c3 JL |
2086 | if (x->outer_mode == NULL) { |
2087 | err = -EPROTONOSUPPORT; | |
b59f45d0 | 2088 | goto error; |
599901c3 | 2089 | } |
b59f45d0 | 2090 | |
a454f0cc WY |
2091 | if (init_replay) { |
2092 | err = xfrm_init_replay(x); | |
2093 | if (err) | |
2094 | goto error; | |
2095 | } | |
2096 | ||
72cb6962 HX |
2097 | x->km.state = XFRM_STATE_VALID; |
2098 | ||
2099 | error: | |
2100 | return err; | |
2101 | } | |
2102 | ||
a454f0cc WY |
2103 | EXPORT_SYMBOL(__xfrm_init_state); |
2104 | ||
2105 | int xfrm_init_state(struct xfrm_state *x) | |
2106 | { | |
2107 | return __xfrm_init_state(x, true); | |
2108 | } | |
2109 | ||
72cb6962 | 2110 | EXPORT_SYMBOL(xfrm_init_state); |
a716c119 | 2111 | |
d62ddc21 | 2112 | int __net_init xfrm_state_init(struct net *net) |
1da177e4 | 2113 | { |
f034b5d4 DM |
2114 | unsigned int sz; |
2115 | ||
9d4139c7 AD |
2116 | INIT_LIST_HEAD(&net->xfrm.state_all); |
2117 | ||
f034b5d4 DM |
2118 | sz = sizeof(struct hlist_head) * 8; |
2119 | ||
73d189dc AD |
2120 | net->xfrm.state_bydst = xfrm_hash_alloc(sz); |
2121 | if (!net->xfrm.state_bydst) | |
2122 | goto out_bydst; | |
d320bbb3 AD |
2123 | net->xfrm.state_bysrc = xfrm_hash_alloc(sz); |
2124 | if (!net->xfrm.state_bysrc) | |
2125 | goto out_bysrc; | |
b754a4fd AD |
2126 | net->xfrm.state_byspi = xfrm_hash_alloc(sz); |
2127 | if (!net->xfrm.state_byspi) | |
2128 | goto out_byspi; | |
529983ec | 2129 | net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1); |
1da177e4 | 2130 | |
0bf7c5b0 | 2131 | net->xfrm.state_num = 0; |
63082733 | 2132 | INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize); |
b8a0ae20 | 2133 | INIT_HLIST_HEAD(&net->xfrm.state_gc_list); |
c7837144 | 2134 | INIT_WORK(&net->xfrm.state_gc_work, xfrm_state_gc_task); |
283bc9f3 | 2135 | spin_lock_init(&net->xfrm.xfrm_state_lock); |
d62ddc21 | 2136 | return 0; |
73d189dc | 2137 | |
b754a4fd AD |
2138 | out_byspi: |
2139 | xfrm_hash_free(net->xfrm.state_bysrc, sz); | |
d320bbb3 AD |
2140 | out_bysrc: |
2141 | xfrm_hash_free(net->xfrm.state_bydst, sz); | |
73d189dc AD |
2142 | out_bydst: |
2143 | return -ENOMEM; | |
d62ddc21 AD |
2144 | } |
2145 | ||
2146 | void xfrm_state_fini(struct net *net) | |
2147 | { | |
73d189dc AD |
2148 | unsigned int sz; |
2149 | ||
7c2776ee | 2150 | flush_work(&net->xfrm.state_hash_work); |
2e71029e | 2151 | xfrm_state_flush(net, IPSEC_PROTO_ANY, false); |
7c2776ee AD |
2152 | flush_work(&net->xfrm.state_gc_work); |
2153 | ||
9d4139c7 | 2154 | WARN_ON(!list_empty(&net->xfrm.state_all)); |
73d189dc | 2155 | |
529983ec | 2156 | sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head); |
b754a4fd AD |
2157 | WARN_ON(!hlist_empty(net->xfrm.state_byspi)); |
2158 | xfrm_hash_free(net->xfrm.state_byspi, sz); | |
d320bbb3 AD |
2159 | WARN_ON(!hlist_empty(net->xfrm.state_bysrc)); |
2160 | xfrm_hash_free(net->xfrm.state_bysrc, sz); | |
73d189dc AD |
2161 | WARN_ON(!hlist_empty(net->xfrm.state_bydst)); |
2162 | xfrm_hash_free(net->xfrm.state_bydst, sz); | |
1da177e4 LT |
2163 | } |
2164 | ||
ab5f5e8b | 2165 | #ifdef CONFIG_AUDITSYSCALL |
cf35f43e IJ |
2166 | static void xfrm_audit_helper_sainfo(struct xfrm_state *x, |
2167 | struct audit_buffer *audit_buf) | |
ab5f5e8b | 2168 | { |
68277acc PM |
2169 | struct xfrm_sec_ctx *ctx = x->security; |
2170 | u32 spi = ntohl(x->id.spi); | |
2171 | ||
2172 | if (ctx) | |
ab5f5e8b | 2173 | audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s", |
68277acc | 2174 | ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str); |
ab5f5e8b | 2175 | |
9b7a787d | 2176 | switch (x->props.family) { |
ab5f5e8b | 2177 | case AF_INET: |
21454aaa HH |
2178 | audit_log_format(audit_buf, " src=%pI4 dst=%pI4", |
2179 | &x->props.saddr.a4, &x->id.daddr.a4); | |
ab5f5e8b JL |
2180 | break; |
2181 | case AF_INET6: | |
5b095d98 | 2182 | audit_log_format(audit_buf, " src=%pI6 dst=%pI6", |
fdb46ee7 | 2183 | x->props.saddr.a6, x->id.daddr.a6); |
ab5f5e8b JL |
2184 | break; |
2185 | } | |
68277acc PM |
2186 | |
2187 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
ab5f5e8b JL |
2188 | } |
2189 | ||
cf35f43e IJ |
2190 | static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family, |
2191 | struct audit_buffer *audit_buf) | |
afeb14b4 | 2192 | { |
b71d1d42 ED |
2193 | const struct iphdr *iph4; |
2194 | const struct ipv6hdr *iph6; | |
afeb14b4 PM |
2195 | |
2196 | switch (family) { | |
2197 | case AF_INET: | |
2198 | iph4 = ip_hdr(skb); | |
21454aaa HH |
2199 | audit_log_format(audit_buf, " src=%pI4 dst=%pI4", |
2200 | &iph4->saddr, &iph4->daddr); | |
afeb14b4 PM |
2201 | break; |
2202 | case AF_INET6: | |
2203 | iph6 = ipv6_hdr(skb); | |
2204 | audit_log_format(audit_buf, | |
5b095d98 | 2205 | " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x", |
9b7a787d | 2206 | &iph6->saddr, &iph6->daddr, |
afeb14b4 PM |
2207 | iph6->flow_lbl[0] & 0x0f, |
2208 | iph6->flow_lbl[1], | |
2209 | iph6->flow_lbl[2]); | |
2210 | break; | |
2211 | } | |
2212 | } | |
2213 | ||
2e71029e | 2214 | void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid) |
ab5f5e8b JL |
2215 | { |
2216 | struct audit_buffer *audit_buf; | |
ab5f5e8b | 2217 | |
afeb14b4 | 2218 | audit_buf = xfrm_audit_start("SAD-add"); |
ab5f5e8b JL |
2219 | if (audit_buf == NULL) |
2220 | return; | |
2e71029e | 2221 | xfrm_audit_helper_usrinfo(task_valid, audit_buf); |
afeb14b4 PM |
2222 | xfrm_audit_helper_sainfo(x, audit_buf); |
2223 | audit_log_format(audit_buf, " res=%u", result); | |
ab5f5e8b JL |
2224 | audit_log_end(audit_buf); |
2225 | } | |
2226 | EXPORT_SYMBOL_GPL(xfrm_audit_state_add); | |
2227 | ||
2e71029e | 2228 | void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid) |
ab5f5e8b JL |
2229 | { |
2230 | struct audit_buffer *audit_buf; | |
ab5f5e8b | 2231 | |
afeb14b4 | 2232 | audit_buf = xfrm_audit_start("SAD-delete"); |
ab5f5e8b JL |
2233 | if (audit_buf == NULL) |
2234 | return; | |
2e71029e | 2235 | xfrm_audit_helper_usrinfo(task_valid, audit_buf); |
afeb14b4 PM |
2236 | xfrm_audit_helper_sainfo(x, audit_buf); |
2237 | audit_log_format(audit_buf, " res=%u", result); | |
ab5f5e8b JL |
2238 | audit_log_end(audit_buf); |
2239 | } | |
2240 | EXPORT_SYMBOL_GPL(xfrm_audit_state_delete); | |
afeb14b4 PM |
2241 | |
2242 | void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
2243 | struct sk_buff *skb) | |
2244 | { | |
2245 | struct audit_buffer *audit_buf; | |
2246 | u32 spi; | |
2247 | ||
2248 | audit_buf = xfrm_audit_start("SA-replay-overflow"); | |
2249 | if (audit_buf == NULL) | |
2250 | return; | |
2251 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2252 | /* don't record the sequence number because it's inherent in this kind | |
2253 | * of audit message */ | |
2254 | spi = ntohl(x->id.spi); | |
2255 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
2256 | audit_log_end(audit_buf); | |
2257 | } | |
2258 | EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow); | |
2259 | ||
9fdc4883 | 2260 | void xfrm_audit_state_replay(struct xfrm_state *x, |
afeb14b4 PM |
2261 | struct sk_buff *skb, __be32 net_seq) |
2262 | { | |
2263 | struct audit_buffer *audit_buf; | |
2264 | u32 spi; | |
2265 | ||
2266 | audit_buf = xfrm_audit_start("SA-replayed-pkt"); | |
2267 | if (audit_buf == NULL) | |
2268 | return; | |
2269 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2270 | spi = ntohl(x->id.spi); | |
2271 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2272 | spi, spi, ntohl(net_seq)); | |
2273 | audit_log_end(audit_buf); | |
2274 | } | |
9fdc4883 | 2275 | EXPORT_SYMBOL_GPL(xfrm_audit_state_replay); |
afeb14b4 PM |
2276 | |
2277 | void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family) | |
2278 | { | |
2279 | struct audit_buffer *audit_buf; | |
2280 | ||
2281 | audit_buf = xfrm_audit_start("SA-notfound"); | |
2282 | if (audit_buf == NULL) | |
2283 | return; | |
2284 | xfrm_audit_helper_pktinfo(skb, family, audit_buf); | |
2285 | audit_log_end(audit_buf); | |
2286 | } | |
2287 | EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple); | |
2288 | ||
2289 | void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
2290 | __be32 net_spi, __be32 net_seq) | |
2291 | { | |
2292 | struct audit_buffer *audit_buf; | |
2293 | u32 spi; | |
2294 | ||
2295 | audit_buf = xfrm_audit_start("SA-notfound"); | |
2296 | if (audit_buf == NULL) | |
2297 | return; | |
2298 | xfrm_audit_helper_pktinfo(skb, family, audit_buf); | |
2299 | spi = ntohl(net_spi); | |
2300 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2301 | spi, spi, ntohl(net_seq)); | |
2302 | audit_log_end(audit_buf); | |
2303 | } | |
2304 | EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound); | |
2305 | ||
2306 | void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
2307 | struct sk_buff *skb, u8 proto) | |
2308 | { | |
2309 | struct audit_buffer *audit_buf; | |
2310 | __be32 net_spi; | |
2311 | __be32 net_seq; | |
2312 | ||
2313 | audit_buf = xfrm_audit_start("SA-icv-failure"); | |
2314 | if (audit_buf == NULL) | |
2315 | return; | |
2316 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2317 | if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) { | |
2318 | u32 spi = ntohl(net_spi); | |
2319 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2320 | spi, spi, ntohl(net_seq)); | |
2321 | } | |
2322 | audit_log_end(audit_buf); | |
2323 | } | |
2324 | EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail); | |
ab5f5e8b | 2325 | #endif /* CONFIG_AUDITSYSCALL */ |