Commit | Line | Data |
---|---|---|
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 | ||
c8406998 FW |
31 | #define xfrm_state_deref_prot(table, net) \ |
32 | rcu_dereference_protected((table), lockdep_is_held(&(net)->xfrm.xfrm_state_lock)) | |
33 | ||
35db57bb FW |
34 | static void xfrm_state_gc_task(struct work_struct *work); |
35 | ||
1da177e4 LT |
36 | /* Each xfrm_state may be linked to two tables: |
37 | ||
38 | 1. Hash table by (spi,daddr,ah/esp) to find SA by SPI. (input,ctl) | |
a624c108 | 39 | 2. Hash table by (daddr,family,reqid) to find what SAs exist for given |
1da177e4 LT |
40 | destination/tunnel endpoint. (output) |
41 | */ | |
42 | ||
f034b5d4 | 43 | static unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024; |
b65e3d7b | 44 | static __read_mostly seqcount_t xfrm_state_hash_generation = SEQCNT_ZERO(xfrm_state_hash_generation); |
f034b5d4 | 45 | |
35db57bb FW |
46 | static DECLARE_WORK(xfrm_state_gc_work, xfrm_state_gc_task); |
47 | static HLIST_HEAD(xfrm_state_gc_list); | |
48 | ||
02efdff7 FW |
49 | static inline bool xfrm_state_hold_rcu(struct xfrm_state __rcu *x) |
50 | { | |
51 | return atomic_inc_not_zero(&x->refcnt); | |
52 | } | |
53 | ||
64d0cd00 | 54 | static inline unsigned int xfrm_dst_hash(struct net *net, |
2ab38503 DM |
55 | const xfrm_address_t *daddr, |
56 | const xfrm_address_t *saddr, | |
c1969f29 | 57 | u32 reqid, |
a624c108 | 58 | unsigned short family) |
f034b5d4 | 59 | { |
64d0cd00 | 60 | return __xfrm_dst_hash(daddr, saddr, reqid, family, net->xfrm.state_hmask); |
f034b5d4 DM |
61 | } |
62 | ||
64d0cd00 | 63 | static inline unsigned int xfrm_src_hash(struct net *net, |
2ab38503 DM |
64 | const xfrm_address_t *daddr, |
65 | const xfrm_address_t *saddr, | |
44e36b42 | 66 | unsigned short family) |
f034b5d4 | 67 | { |
64d0cd00 | 68 | return __xfrm_src_hash(daddr, saddr, family, net->xfrm.state_hmask); |
f034b5d4 DM |
69 | } |
70 | ||
f034b5d4 | 71 | static inline unsigned int |
2ab38503 DM |
72 | xfrm_spi_hash(struct net *net, const xfrm_address_t *daddr, |
73 | __be32 spi, u8 proto, unsigned short family) | |
f034b5d4 | 74 | { |
64d0cd00 | 75 | return __xfrm_spi_hash(daddr, spi, proto, family, net->xfrm.state_hmask); |
f034b5d4 DM |
76 | } |
77 | ||
f034b5d4 DM |
78 | static void xfrm_hash_transfer(struct hlist_head *list, |
79 | struct hlist_head *ndsttable, | |
80 | struct hlist_head *nsrctable, | |
81 | struct hlist_head *nspitable, | |
82 | unsigned int nhashmask) | |
83 | { | |
b67bfe0d | 84 | struct hlist_node *tmp; |
f034b5d4 DM |
85 | struct xfrm_state *x; |
86 | ||
b67bfe0d | 87 | hlist_for_each_entry_safe(x, tmp, list, bydst) { |
f034b5d4 DM |
88 | unsigned int h; |
89 | ||
c1969f29 DM |
90 | h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr, |
91 | x->props.reqid, x->props.family, | |
92 | nhashmask); | |
ae3fb6d3 | 93 | hlist_add_head_rcu(&x->bydst, ndsttable + h); |
f034b5d4 | 94 | |
667bbcb6 MN |
95 | h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr, |
96 | x->props.family, | |
f034b5d4 | 97 | nhashmask); |
ae3fb6d3 | 98 | hlist_add_head_rcu(&x->bysrc, nsrctable + h); |
f034b5d4 | 99 | |
7b4dc360 MN |
100 | if (x->id.spi) { |
101 | h = __xfrm_spi_hash(&x->id.daddr, x->id.spi, | |
102 | x->id.proto, x->props.family, | |
103 | nhashmask); | |
ae3fb6d3 | 104 | hlist_add_head_rcu(&x->byspi, nspitable + h); |
7b4dc360 | 105 | } |
f034b5d4 DM |
106 | } |
107 | } | |
108 | ||
63082733 | 109 | static unsigned long xfrm_hash_new_size(unsigned int state_hmask) |
f034b5d4 | 110 | { |
63082733 | 111 | return ((state_hmask + 1) << 1) * sizeof(struct hlist_head); |
f034b5d4 DM |
112 | } |
113 | ||
63082733 | 114 | static void xfrm_hash_resize(struct work_struct *work) |
f034b5d4 | 115 | { |
63082733 | 116 | struct net *net = container_of(work, struct net, xfrm.state_hash_work); |
f034b5d4 DM |
117 | struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi; |
118 | unsigned long nsize, osize; | |
119 | unsigned int nhashmask, ohashmask; | |
120 | int i; | |
121 | ||
63082733 | 122 | nsize = xfrm_hash_new_size(net->xfrm.state_hmask); |
44e36b42 | 123 | ndst = xfrm_hash_alloc(nsize); |
f034b5d4 | 124 | if (!ndst) |
0244790c | 125 | return; |
44e36b42 | 126 | nsrc = xfrm_hash_alloc(nsize); |
f034b5d4 | 127 | if (!nsrc) { |
44e36b42 | 128 | xfrm_hash_free(ndst, nsize); |
0244790c | 129 | return; |
f034b5d4 | 130 | } |
44e36b42 | 131 | nspi = xfrm_hash_alloc(nsize); |
f034b5d4 | 132 | if (!nspi) { |
44e36b42 DM |
133 | xfrm_hash_free(ndst, nsize); |
134 | xfrm_hash_free(nsrc, nsize); | |
0244790c | 135 | return; |
f034b5d4 DM |
136 | } |
137 | ||
283bc9f3 | 138 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
b65e3d7b | 139 | write_seqcount_begin(&xfrm_state_hash_generation); |
f034b5d4 DM |
140 | |
141 | nhashmask = (nsize / sizeof(struct hlist_head)) - 1U; | |
c8406998 | 142 | odst = xfrm_state_deref_prot(net->xfrm.state_bydst, net); |
63082733 | 143 | for (i = net->xfrm.state_hmask; i >= 0; i--) |
c8406998 | 144 | xfrm_hash_transfer(odst + i, ndst, nsrc, nspi, nhashmask); |
f034b5d4 | 145 | |
c8406998 FW |
146 | osrc = xfrm_state_deref_prot(net->xfrm.state_bysrc, net); |
147 | ospi = xfrm_state_deref_prot(net->xfrm.state_byspi, net); | |
63082733 | 148 | ohashmask = net->xfrm.state_hmask; |
f034b5d4 | 149 | |
c8406998 FW |
150 | rcu_assign_pointer(net->xfrm.state_bydst, ndst); |
151 | rcu_assign_pointer(net->xfrm.state_bysrc, nsrc); | |
152 | rcu_assign_pointer(net->xfrm.state_byspi, nspi); | |
63082733 | 153 | net->xfrm.state_hmask = nhashmask; |
f034b5d4 | 154 | |
b65e3d7b | 155 | write_seqcount_end(&xfrm_state_hash_generation); |
283bc9f3 | 156 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
f034b5d4 DM |
157 | |
158 | osize = (ohashmask + 1) * sizeof(struct hlist_head); | |
df7274eb FW |
159 | |
160 | synchronize_rcu(); | |
161 | ||
44e36b42 DM |
162 | xfrm_hash_free(odst, osize); |
163 | xfrm_hash_free(osrc, osize); | |
164 | xfrm_hash_free(ospi, osize); | |
f034b5d4 DM |
165 | } |
166 | ||
44abdc30 CW |
167 | static DEFINE_SPINLOCK(xfrm_state_afinfo_lock); |
168 | static struct xfrm_state_afinfo __rcu *xfrm_state_afinfo[NPROTO]; | |
1da177e4 | 169 | |
1da177e4 LT |
170 | static DEFINE_SPINLOCK(xfrm_state_gc_lock); |
171 | ||
53bc6b4d | 172 | int __xfrm_state_delete(struct xfrm_state *x); |
1da177e4 | 173 | |
980ebd25 | 174 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); |
0f24558e | 175 | bool km_is_alive(const struct km_event *c); |
15e47304 | 176 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid); |
1da177e4 | 177 | |
7a9885b9 | 178 | static DEFINE_SPINLOCK(xfrm_type_lock); |
533cb5b0 | 179 | int xfrm_register_type(const struct xfrm_type *type, unsigned short family) |
aa5d62cc | 180 | { |
7a9885b9 | 181 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); |
533cb5b0 | 182 | const struct xfrm_type **typemap; |
aa5d62cc HX |
183 | int err = 0; |
184 | ||
185 | if (unlikely(afinfo == NULL)) | |
186 | return -EAFNOSUPPORT; | |
187 | typemap = afinfo->type_map; | |
7a9885b9 | 188 | spin_lock_bh(&xfrm_type_lock); |
aa5d62cc HX |
189 | |
190 | if (likely(typemap[type->proto] == NULL)) | |
191 | typemap[type->proto] = type; | |
192 | else | |
193 | err = -EEXIST; | |
7a9885b9 CW |
194 | spin_unlock_bh(&xfrm_type_lock); |
195 | xfrm_state_put_afinfo(afinfo); | |
aa5d62cc HX |
196 | return err; |
197 | } | |
198 | EXPORT_SYMBOL(xfrm_register_type); | |
199 | ||
533cb5b0 | 200 | int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family) |
aa5d62cc | 201 | { |
7a9885b9 | 202 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); |
533cb5b0 | 203 | const struct xfrm_type **typemap; |
aa5d62cc HX |
204 | int err = 0; |
205 | ||
206 | if (unlikely(afinfo == NULL)) | |
207 | return -EAFNOSUPPORT; | |
208 | typemap = afinfo->type_map; | |
7a9885b9 | 209 | spin_lock_bh(&xfrm_type_lock); |
aa5d62cc HX |
210 | |
211 | if (unlikely(typemap[type->proto] != type)) | |
212 | err = -ENOENT; | |
213 | else | |
214 | typemap[type->proto] = NULL; | |
7a9885b9 CW |
215 | spin_unlock_bh(&xfrm_type_lock); |
216 | xfrm_state_put_afinfo(afinfo); | |
aa5d62cc HX |
217 | return err; |
218 | } | |
219 | EXPORT_SYMBOL(xfrm_unregister_type); | |
220 | ||
533cb5b0 | 221 | static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family) |
aa5d62cc HX |
222 | { |
223 | struct xfrm_state_afinfo *afinfo; | |
533cb5b0 ED |
224 | const struct xfrm_type **typemap; |
225 | const struct xfrm_type *type; | |
aa5d62cc HX |
226 | int modload_attempted = 0; |
227 | ||
228 | retry: | |
229 | afinfo = xfrm_state_get_afinfo(family); | |
230 | if (unlikely(afinfo == NULL)) | |
231 | return NULL; | |
232 | typemap = afinfo->type_map; | |
233 | ||
234 | type = typemap[proto]; | |
235 | if (unlikely(type && !try_module_get(type->owner))) | |
236 | type = NULL; | |
237 | if (!type && !modload_attempted) { | |
238 | xfrm_state_put_afinfo(afinfo); | |
239 | request_module("xfrm-type-%d-%d", family, proto); | |
240 | modload_attempted = 1; | |
241 | goto retry; | |
242 | } | |
243 | ||
244 | xfrm_state_put_afinfo(afinfo); | |
245 | return type; | |
246 | } | |
247 | ||
533cb5b0 | 248 | static void xfrm_put_type(const struct xfrm_type *type) |
aa5d62cc HX |
249 | { |
250 | module_put(type->owner); | |
251 | } | |
252 | ||
7a9885b9 | 253 | static DEFINE_SPINLOCK(xfrm_mode_lock); |
aa5d62cc HX |
254 | int xfrm_register_mode(struct xfrm_mode *mode, int family) |
255 | { | |
256 | struct xfrm_state_afinfo *afinfo; | |
257 | struct xfrm_mode **modemap; | |
258 | int err; | |
259 | ||
260 | if (unlikely(mode->encap >= XFRM_MODE_MAX)) | |
261 | return -EINVAL; | |
262 | ||
7a9885b9 | 263 | afinfo = xfrm_state_get_afinfo(family); |
aa5d62cc HX |
264 | if (unlikely(afinfo == NULL)) |
265 | return -EAFNOSUPPORT; | |
266 | ||
267 | err = -EEXIST; | |
268 | modemap = afinfo->mode_map; | |
7a9885b9 | 269 | spin_lock_bh(&xfrm_mode_lock); |
17c2a42a HX |
270 | if (modemap[mode->encap]) |
271 | goto out; | |
aa5d62cc | 272 | |
17c2a42a HX |
273 | err = -ENOENT; |
274 | if (!try_module_get(afinfo->owner)) | |
275 | goto out; | |
276 | ||
277 | mode->afinfo = afinfo; | |
278 | modemap[mode->encap] = mode; | |
279 | err = 0; | |
280 | ||
281 | out: | |
7a9885b9 CW |
282 | spin_unlock_bh(&xfrm_mode_lock); |
283 | xfrm_state_put_afinfo(afinfo); | |
aa5d62cc HX |
284 | return err; |
285 | } | |
286 | EXPORT_SYMBOL(xfrm_register_mode); | |
287 | ||
288 | int xfrm_unregister_mode(struct xfrm_mode *mode, int family) | |
289 | { | |
290 | struct xfrm_state_afinfo *afinfo; | |
291 | struct xfrm_mode **modemap; | |
292 | int err; | |
293 | ||
294 | if (unlikely(mode->encap >= XFRM_MODE_MAX)) | |
295 | return -EINVAL; | |
296 | ||
7a9885b9 | 297 | afinfo = xfrm_state_get_afinfo(family); |
aa5d62cc HX |
298 | if (unlikely(afinfo == NULL)) |
299 | return -EAFNOSUPPORT; | |
300 | ||
301 | err = -ENOENT; | |
302 | modemap = afinfo->mode_map; | |
7a9885b9 | 303 | spin_lock_bh(&xfrm_mode_lock); |
aa5d62cc HX |
304 | if (likely(modemap[mode->encap] == mode)) { |
305 | modemap[mode->encap] = NULL; | |
17c2a42a | 306 | module_put(mode->afinfo->owner); |
aa5d62cc HX |
307 | err = 0; |
308 | } | |
309 | ||
7a9885b9 CW |
310 | spin_unlock_bh(&xfrm_mode_lock); |
311 | xfrm_state_put_afinfo(afinfo); | |
aa5d62cc HX |
312 | return err; |
313 | } | |
314 | EXPORT_SYMBOL(xfrm_unregister_mode); | |
315 | ||
316 | static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family) | |
317 | { | |
318 | struct xfrm_state_afinfo *afinfo; | |
319 | struct xfrm_mode *mode; | |
320 | int modload_attempted = 0; | |
321 | ||
322 | if (unlikely(encap >= XFRM_MODE_MAX)) | |
323 | return NULL; | |
324 | ||
325 | retry: | |
326 | afinfo = xfrm_state_get_afinfo(family); | |
327 | if (unlikely(afinfo == NULL)) | |
328 | return NULL; | |
329 | ||
330 | mode = afinfo->mode_map[encap]; | |
331 | if (unlikely(mode && !try_module_get(mode->owner))) | |
332 | mode = NULL; | |
333 | if (!mode && !modload_attempted) { | |
334 | xfrm_state_put_afinfo(afinfo); | |
335 | request_module("xfrm-mode-%d-%d", family, encap); | |
336 | modload_attempted = 1; | |
337 | goto retry; | |
338 | } | |
339 | ||
340 | xfrm_state_put_afinfo(afinfo); | |
341 | return mode; | |
342 | } | |
343 | ||
344 | static void xfrm_put_mode(struct xfrm_mode *mode) | |
345 | { | |
346 | module_put(mode->owner); | |
347 | } | |
348 | ||
1da177e4 LT |
349 | static void xfrm_state_gc_destroy(struct xfrm_state *x) |
350 | { | |
9e0d57fd | 351 | tasklet_hrtimer_cancel(&x->mtimer); |
a47f0ce0 | 352 | del_timer_sync(&x->rtimer); |
b5884793 | 353 | kfree(x->aead); |
a51482bd JJ |
354 | kfree(x->aalg); |
355 | kfree(x->ealg); | |
356 | kfree(x->calg); | |
357 | kfree(x->encap); | |
060f02a3 | 358 | kfree(x->coaddr); |
d8647b79 SK |
359 | kfree(x->replay_esn); |
360 | kfree(x->preplay_esn); | |
13996378 HX |
361 | if (x->inner_mode) |
362 | xfrm_put_mode(x->inner_mode); | |
df9dcb45 KM |
363 | if (x->inner_mode_iaf) |
364 | xfrm_put_mode(x->inner_mode_iaf); | |
13996378 HX |
365 | if (x->outer_mode) |
366 | xfrm_put_mode(x->outer_mode); | |
1da177e4 LT |
367 | if (x->type) { |
368 | x->type->destructor(x); | |
369 | xfrm_put_type(x->type); | |
370 | } | |
df71837d | 371 | security_xfrm_state_free(x); |
1da177e4 LT |
372 | kfree(x); |
373 | } | |
374 | ||
c7837144 | 375 | static void xfrm_state_gc_task(struct work_struct *work) |
1da177e4 | 376 | { |
12a169e7 | 377 | struct xfrm_state *x; |
b67bfe0d | 378 | struct hlist_node *tmp; |
12a169e7 | 379 | struct hlist_head gc_list; |
1da177e4 | 380 | |
1da177e4 | 381 | spin_lock_bh(&xfrm_state_gc_lock); |
35db57bb | 382 | hlist_move_list(&xfrm_state_gc_list, &gc_list); |
1da177e4 LT |
383 | spin_unlock_bh(&xfrm_state_gc_lock); |
384 | ||
df7274eb FW |
385 | synchronize_rcu(); |
386 | ||
b67bfe0d | 387 | hlist_for_each_entry_safe(x, tmp, &gc_list, gclist) |
1da177e4 | 388 | xfrm_state_gc_destroy(x); |
1da177e4 LT |
389 | } |
390 | ||
391 | static inline unsigned long make_jiffies(long secs) | |
392 | { | |
393 | if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ) | |
394 | return MAX_SCHEDULE_TIMEOUT-1; | |
395 | else | |
a716c119 | 396 | return secs*HZ; |
1da177e4 LT |
397 | } |
398 | ||
3e94c2dc | 399 | static enum hrtimer_restart xfrm_timer_handler(struct hrtimer *me) |
1da177e4 | 400 | { |
9e0d57fd YP |
401 | struct tasklet_hrtimer *thr = container_of(me, struct tasklet_hrtimer, timer); |
402 | struct xfrm_state *x = container_of(thr, struct xfrm_state, mtimer); | |
9d729f72 | 403 | unsigned long now = get_seconds(); |
1da177e4 LT |
404 | long next = LONG_MAX; |
405 | int warn = 0; | |
161a09e7 | 406 | int err = 0; |
1da177e4 LT |
407 | |
408 | spin_lock(&x->lock); | |
409 | if (x->km.state == XFRM_STATE_DEAD) | |
410 | goto out; | |
411 | if (x->km.state == XFRM_STATE_EXPIRED) | |
412 | goto expired; | |
413 | if (x->lft.hard_add_expires_seconds) { | |
414 | long tmo = x->lft.hard_add_expires_seconds + | |
415 | x->curlft.add_time - now; | |
e3c0d047 FD |
416 | if (tmo <= 0) { |
417 | if (x->xflags & XFRM_SOFT_EXPIRE) { | |
418 | /* enter hard expire without soft expire first?! | |
419 | * setting a new date could trigger this. | |
420 | * workarbound: fix x->curflt.add_time by below: | |
421 | */ | |
422 | x->curlft.add_time = now - x->saved_tmo - 1; | |
423 | tmo = x->lft.hard_add_expires_seconds - x->saved_tmo; | |
424 | } else | |
425 | goto expired; | |
426 | } | |
1da177e4 LT |
427 | if (tmo < next) |
428 | next = tmo; | |
429 | } | |
430 | if (x->lft.hard_use_expires_seconds) { | |
431 | long tmo = x->lft.hard_use_expires_seconds + | |
432 | (x->curlft.use_time ? : now) - now; | |
433 | if (tmo <= 0) | |
434 | goto expired; | |
435 | if (tmo < next) | |
436 | next = tmo; | |
437 | } | |
438 | if (x->km.dying) | |
439 | goto resched; | |
440 | if (x->lft.soft_add_expires_seconds) { | |
441 | long tmo = x->lft.soft_add_expires_seconds + | |
442 | x->curlft.add_time - now; | |
e3c0d047 | 443 | if (tmo <= 0) { |
1da177e4 | 444 | warn = 1; |
e3c0d047 FD |
445 | x->xflags &= ~XFRM_SOFT_EXPIRE; |
446 | } else if (tmo < next) { | |
1da177e4 | 447 | next = tmo; |
e3c0d047 FD |
448 | x->xflags |= XFRM_SOFT_EXPIRE; |
449 | x->saved_tmo = tmo; | |
450 | } | |
1da177e4 LT |
451 | } |
452 | if (x->lft.soft_use_expires_seconds) { | |
453 | long tmo = x->lft.soft_use_expires_seconds + | |
454 | (x->curlft.use_time ? : now) - now; | |
455 | if (tmo <= 0) | |
456 | warn = 1; | |
457 | else if (tmo < next) | |
458 | next = tmo; | |
459 | } | |
460 | ||
4666faab | 461 | x->km.dying = warn; |
1da177e4 | 462 | if (warn) |
53bc6b4d | 463 | km_state_expired(x, 0, 0); |
1da177e4 | 464 | resched: |
9b7a787d | 465 | if (next != LONG_MAX) { |
9e0d57fd YP |
466 | tasklet_hrtimer_start(&x->mtimer, ktime_set(next, 0), HRTIMER_MODE_REL); |
467 | } | |
a47f0ce0 | 468 | |
1da177e4 LT |
469 | goto out; |
470 | ||
471 | expired: | |
5b8ef341 | 472 | if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) |
1da177e4 | 473 | x->km.state = XFRM_STATE_EXPIRED; |
161a09e7 JL |
474 | |
475 | err = __xfrm_state_delete(x); | |
0806ae4c | 476 | if (!err) |
53bc6b4d | 477 | km_state_expired(x, 1, 0); |
1da177e4 | 478 | |
2e71029e | 479 | xfrm_audit_state_delete(x, err ? 0 : 1, true); |
161a09e7 | 480 | |
1da177e4 LT |
481 | out: |
482 | spin_unlock(&x->lock); | |
9e0d57fd | 483 | return HRTIMER_NORESTART; |
1da177e4 LT |
484 | } |
485 | ||
0ac84752 DM |
486 | static void xfrm_replay_timer_handler(unsigned long data); |
487 | ||
673c09be | 488 | struct xfrm_state *xfrm_state_alloc(struct net *net) |
1da177e4 LT |
489 | { |
490 | struct xfrm_state *x; | |
491 | ||
0da974f4 | 492 | x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC); |
1da177e4 LT |
493 | |
494 | if (x) { | |
673c09be | 495 | write_pnet(&x->xs_net, net); |
1da177e4 LT |
496 | atomic_set(&x->refcnt, 1); |
497 | atomic_set(&x->tunnel_users, 0); | |
12a169e7 | 498 | INIT_LIST_HEAD(&x->km.all); |
8f126e37 DM |
499 | INIT_HLIST_NODE(&x->bydst); |
500 | INIT_HLIST_NODE(&x->bysrc); | |
501 | INIT_HLIST_NODE(&x->byspi); | |
99565a6c FD |
502 | tasklet_hrtimer_init(&x->mtimer, xfrm_timer_handler, |
503 | CLOCK_BOOTTIME, HRTIMER_MODE_ABS); | |
b24b8a24 PE |
504 | setup_timer(&x->rtimer, xfrm_replay_timer_handler, |
505 | (unsigned long)x); | |
9d729f72 | 506 | x->curlft.add_time = get_seconds(); |
1da177e4 LT |
507 | x->lft.soft_byte_limit = XFRM_INF; |
508 | x->lft.soft_packet_limit = XFRM_INF; | |
509 | x->lft.hard_byte_limit = XFRM_INF; | |
510 | x->lft.hard_packet_limit = XFRM_INF; | |
f8cd5488 JHS |
511 | x->replay_maxage = 0; |
512 | x->replay_maxdiff = 0; | |
df9dcb45 KM |
513 | x->inner_mode = NULL; |
514 | x->inner_mode_iaf = NULL; | |
1da177e4 LT |
515 | spin_lock_init(&x->lock); |
516 | } | |
517 | return x; | |
518 | } | |
519 | EXPORT_SYMBOL(xfrm_state_alloc); | |
520 | ||
521 | void __xfrm_state_destroy(struct xfrm_state *x) | |
522 | { | |
547b792c | 523 | WARN_ON(x->km.state != XFRM_STATE_DEAD); |
1da177e4 LT |
524 | |
525 | spin_lock_bh(&xfrm_state_gc_lock); | |
35db57bb | 526 | hlist_add_head(&x->gclist, &xfrm_state_gc_list); |
1da177e4 | 527 | spin_unlock_bh(&xfrm_state_gc_lock); |
35db57bb | 528 | schedule_work(&xfrm_state_gc_work); |
1da177e4 LT |
529 | } |
530 | EXPORT_SYMBOL(__xfrm_state_destroy); | |
531 | ||
53bc6b4d | 532 | int __xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 533 | { |
98806f75 | 534 | struct net *net = xs_net(x); |
26b15dad JHS |
535 | int err = -ESRCH; |
536 | ||
1da177e4 LT |
537 | if (x->km.state != XFRM_STATE_DEAD) { |
538 | x->km.state = XFRM_STATE_DEAD; | |
283bc9f3 | 539 | spin_lock(&net->xfrm.xfrm_state_lock); |
12a169e7 | 540 | list_del(&x->km.all); |
ae3fb6d3 FW |
541 | hlist_del_rcu(&x->bydst); |
542 | hlist_del_rcu(&x->bysrc); | |
a47f0ce0 | 543 | if (x->id.spi) |
ae3fb6d3 | 544 | hlist_del_rcu(&x->byspi); |
98806f75 | 545 | net->xfrm.state_num--; |
283bc9f3 | 546 | spin_unlock(&net->xfrm.xfrm_state_lock); |
1da177e4 | 547 | |
1da177e4 LT |
548 | /* All xfrm_state objects are created by xfrm_state_alloc. |
549 | * The xfrm_state_alloc call gives a reference, and that | |
550 | * is what we are dropping here. | |
551 | */ | |
5dba4797 | 552 | xfrm_state_put(x); |
26b15dad | 553 | err = 0; |
1da177e4 | 554 | } |
26b15dad JHS |
555 | |
556 | return err; | |
1da177e4 | 557 | } |
53bc6b4d | 558 | EXPORT_SYMBOL(__xfrm_state_delete); |
1da177e4 | 559 | |
26b15dad | 560 | int xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 561 | { |
26b15dad JHS |
562 | int err; |
563 | ||
1da177e4 | 564 | spin_lock_bh(&x->lock); |
26b15dad | 565 | err = __xfrm_state_delete(x); |
1da177e4 | 566 | spin_unlock_bh(&x->lock); |
26b15dad JHS |
567 | |
568 | return err; | |
1da177e4 LT |
569 | } |
570 | EXPORT_SYMBOL(xfrm_state_delete); | |
571 | ||
4aa2e62c JL |
572 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
573 | static inline int | |
2e71029e | 574 | xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid) |
1da177e4 | 575 | { |
4aa2e62c JL |
576 | int i, err = 0; |
577 | ||
0e602451 | 578 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
4aa2e62c JL |
579 | struct xfrm_state *x; |
580 | ||
b67bfe0d | 581 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
4aa2e62c JL |
582 | if (xfrm_id_proto_match(x->id.proto, proto) && |
583 | (err = security_xfrm_state_delete(x)) != 0) { | |
2e71029e | 584 | xfrm_audit_state_delete(x, 0, task_valid); |
4aa2e62c JL |
585 | return err; |
586 | } | |
587 | } | |
588 | } | |
589 | ||
590 | return err; | |
591 | } | |
592 | #else | |
593 | static inline int | |
2e71029e | 594 | xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid) |
4aa2e62c JL |
595 | { |
596 | return 0; | |
597 | } | |
598 | #endif | |
599 | ||
2e71029e | 600 | int xfrm_state_flush(struct net *net, u8 proto, bool task_valid) |
4aa2e62c | 601 | { |
9e64cc95 | 602 | int i, err = 0, cnt = 0; |
1da177e4 | 603 | |
283bc9f3 | 604 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
2e71029e | 605 | err = xfrm_state_flush_secctx_check(net, proto, task_valid); |
4aa2e62c JL |
606 | if (err) |
607 | goto out; | |
608 | ||
9e64cc95 | 609 | err = -ESRCH; |
0e602451 | 610 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
8f126e37 | 611 | struct xfrm_state *x; |
1da177e4 | 612 | restart: |
b67bfe0d | 613 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
1da177e4 | 614 | if (!xfrm_state_kern(x) && |
5794708f | 615 | xfrm_id_proto_match(x->id.proto, proto)) { |
1da177e4 | 616 | xfrm_state_hold(x); |
283bc9f3 | 617 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 618 | |
161a09e7 | 619 | err = xfrm_state_delete(x); |
ab5f5e8b | 620 | xfrm_audit_state_delete(x, err ? 0 : 1, |
2e71029e | 621 | task_valid); |
1da177e4 | 622 | xfrm_state_put(x); |
9e64cc95 JHS |
623 | if (!err) |
624 | cnt++; | |
1da177e4 | 625 | |
283bc9f3 | 626 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
627 | goto restart; |
628 | } | |
629 | } | |
630 | } | |
9e64cc95 JHS |
631 | if (cnt) |
632 | err = 0; | |
4aa2e62c JL |
633 | |
634 | out: | |
283bc9f3 | 635 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
4aa2e62c | 636 | return err; |
1da177e4 LT |
637 | } |
638 | EXPORT_SYMBOL(xfrm_state_flush); | |
639 | ||
e071041b | 640 | void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si) |
28d8909b | 641 | { |
283bc9f3 | 642 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
e071041b AD |
643 | si->sadcnt = net->xfrm.state_num; |
644 | si->sadhcnt = net->xfrm.state_hmask; | |
28d8909b | 645 | si->sadhmcnt = xfrm_state_hashmax; |
283bc9f3 | 646 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
28d8909b JHS |
647 | } |
648 | EXPORT_SYMBOL(xfrm_sad_getinfo); | |
649 | ||
1da177e4 | 650 | static int |
1a898592 | 651 | xfrm_init_tempstate(struct xfrm_state *x, const struct flowi *fl, |
04686013 | 652 | const struct xfrm_tmpl *tmpl, |
33765d06 | 653 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
8444cf71 | 654 | unsigned short family) |
1da177e4 LT |
655 | { |
656 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
657 | if (!afinfo) | |
658 | return -1; | |
8444cf71 TE |
659 | afinfo->init_tempsel(&x->sel, fl); |
660 | ||
661 | if (family != tmpl->encap_family) { | |
662 | xfrm_state_put_afinfo(afinfo); | |
663 | afinfo = xfrm_state_get_afinfo(tmpl->encap_family); | |
664 | if (!afinfo) | |
665 | return -1; | |
666 | } | |
667 | afinfo->init_temprop(x, tmpl, daddr, saddr); | |
1da177e4 LT |
668 | xfrm_state_put_afinfo(afinfo); |
669 | return 0; | |
670 | } | |
671 | ||
9aa60088 DM |
672 | static struct xfrm_state *__xfrm_state_lookup(struct net *net, u32 mark, |
673 | const xfrm_address_t *daddr, | |
674 | __be32 spi, u8 proto, | |
675 | unsigned short family) | |
edcd5821 | 676 | { |
221df1ed | 677 | unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family); |
edcd5821 DM |
678 | struct xfrm_state *x; |
679 | ||
ae3fb6d3 | 680 | hlist_for_each_entry_rcu(x, net->xfrm.state_byspi + h, byspi) { |
edcd5821 DM |
681 | if (x->props.family != family || |
682 | x->id.spi != spi || | |
1802571b | 683 | x->id.proto != proto || |
70e94e66 | 684 | !xfrm_addr_equal(&x->id.daddr, daddr, family)) |
edcd5821 DM |
685 | continue; |
686 | ||
3d6acfa7 JHS |
687 | if ((mark & x->mark.m) != x->mark.v) |
688 | continue; | |
02efdff7 FW |
689 | if (!xfrm_state_hold_rcu(x)) |
690 | continue; | |
edcd5821 DM |
691 | return x; |
692 | } | |
693 | ||
694 | return NULL; | |
695 | } | |
696 | ||
9aa60088 DM |
697 | static struct xfrm_state *__xfrm_state_lookup_byaddr(struct net *net, u32 mark, |
698 | const xfrm_address_t *daddr, | |
699 | const xfrm_address_t *saddr, | |
700 | u8 proto, unsigned short family) | |
edcd5821 | 701 | { |
221df1ed | 702 | unsigned int h = xfrm_src_hash(net, daddr, saddr, family); |
edcd5821 DM |
703 | struct xfrm_state *x; |
704 | ||
ae3fb6d3 | 705 | hlist_for_each_entry_rcu(x, net->xfrm.state_bysrc + h, bysrc) { |
edcd5821 | 706 | if (x->props.family != family || |
1802571b | 707 | x->id.proto != proto || |
70e94e66 YH |
708 | !xfrm_addr_equal(&x->id.daddr, daddr, family) || |
709 | !xfrm_addr_equal(&x->props.saddr, saddr, family)) | |
edcd5821 DM |
710 | continue; |
711 | ||
3d6acfa7 JHS |
712 | if ((mark & x->mark.m) != x->mark.v) |
713 | continue; | |
02efdff7 FW |
714 | if (!xfrm_state_hold_rcu(x)) |
715 | continue; | |
edcd5821 DM |
716 | return x; |
717 | } | |
718 | ||
719 | return NULL; | |
720 | } | |
721 | ||
722 | static inline struct xfrm_state * | |
723 | __xfrm_state_locate(struct xfrm_state *x, int use_spi, int family) | |
724 | { | |
221df1ed | 725 | struct net *net = xs_net(x); |
bd55775c | 726 | u32 mark = x->mark.v & x->mark.m; |
221df1ed | 727 | |
edcd5821 | 728 | if (use_spi) |
bd55775c JHS |
729 | return __xfrm_state_lookup(net, mark, &x->id.daddr, |
730 | x->id.spi, x->id.proto, family); | |
edcd5821 | 731 | else |
bd55775c JHS |
732 | return __xfrm_state_lookup_byaddr(net, mark, |
733 | &x->id.daddr, | |
edcd5821 DM |
734 | &x->props.saddr, |
735 | x->id.proto, family); | |
736 | } | |
737 | ||
98806f75 | 738 | static void xfrm_hash_grow_check(struct net *net, int have_hash_collision) |
2fab22f2 PM |
739 | { |
740 | if (have_hash_collision && | |
98806f75 AD |
741 | (net->xfrm.state_hmask + 1) < xfrm_state_hashmax && |
742 | net->xfrm.state_num > net->xfrm.state_hmask) | |
743 | schedule_work(&net->xfrm.state_hash_work); | |
2fab22f2 PM |
744 | } |
745 | ||
08ec9af1 | 746 | static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x, |
4a08ab0f | 747 | const struct flowi *fl, unsigned short family, |
08ec9af1 DM |
748 | struct xfrm_state **best, int *acq_in_progress, |
749 | int *error) | |
750 | { | |
751 | /* Resolution logic: | |
752 | * 1. There is a valid state with matching selector. Done. | |
753 | * 2. Valid state with inappropriate selector. Skip. | |
754 | * | |
755 | * Entering area of "sysdeps". | |
756 | * | |
757 | * 3. If state is not valid, selector is temporary, it selects | |
758 | * only session which triggered previous resolution. Key | |
759 | * manager will do something to install a state with proper | |
760 | * selector. | |
761 | */ | |
762 | if (x->km.state == XFRM_STATE_VALID) { | |
763 | if ((x->sel.family && | |
764 | !xfrm_selector_match(&x->sel, fl, x->sel.family)) || | |
765 | !security_xfrm_state_pol_flow_match(x, pol, fl)) | |
766 | return; | |
767 | ||
768 | if (!*best || | |
769 | (*best)->km.dying > x->km.dying || | |
770 | ((*best)->km.dying == x->km.dying && | |
771 | (*best)->curlft.add_time < x->curlft.add_time)) | |
772 | *best = x; | |
773 | } else if (x->km.state == XFRM_STATE_ACQ) { | |
774 | *acq_in_progress = 1; | |
775 | } else if (x->km.state == XFRM_STATE_ERROR || | |
776 | x->km.state == XFRM_STATE_EXPIRED) { | |
777 | if (xfrm_selector_match(&x->sel, fl, x->sel.family) && | |
778 | security_xfrm_state_pol_flow_match(x, pol, fl)) | |
779 | *error = -ESRCH; | |
780 | } | |
781 | } | |
782 | ||
1da177e4 | 783 | struct xfrm_state * |
33765d06 | 784 | xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
b520e9f6 | 785 | const struct flowi *fl, struct xfrm_tmpl *tmpl, |
1da177e4 LT |
786 | struct xfrm_policy *pol, int *err, |
787 | unsigned short family) | |
788 | { | |
08ec9af1 | 789 | static xfrm_address_t saddr_wildcard = { }; |
5447c5e4 | 790 | struct net *net = xp_net(pol); |
6a783c90 | 791 | unsigned int h, h_wildcard; |
37b08e34 | 792 | struct xfrm_state *x, *x0, *to_put; |
1da177e4 LT |
793 | int acquire_in_progress = 0; |
794 | int error = 0; | |
795 | struct xfrm_state *best = NULL; | |
bd55775c | 796 | u32 mark = pol->mark.v & pol->mark.m; |
8444cf71 | 797 | unsigned short encap_family = tmpl->encap_family; |
b65e3d7b | 798 | unsigned int sequence; |
0f24558e | 799 | struct km_event c; |
a716c119 | 800 | |
37b08e34 DM |
801 | to_put = NULL; |
802 | ||
b65e3d7b FW |
803 | sequence = read_seqcount_begin(&xfrm_state_hash_generation); |
804 | ||
d737a580 | 805 | rcu_read_lock(); |
8444cf71 | 806 | h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family); |
ae3fb6d3 | 807 | hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h, bydst) { |
8444cf71 | 808 | if (x->props.family == encap_family && |
1da177e4 | 809 | x->props.reqid == tmpl->reqid && |
3d6acfa7 | 810 | (mark & x->mark.m) == x->mark.v && |
fbd9a5b4 | 811 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
8444cf71 | 812 | xfrm_state_addr_check(x, daddr, saddr, encap_family) && |
1da177e4 LT |
813 | tmpl->mode == x->props.mode && |
814 | tmpl->id.proto == x->id.proto && | |
08ec9af1 | 815 | (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) |
1f673c5f | 816 | xfrm_state_look_at(pol, x, fl, encap_family, |
08ec9af1 DM |
817 | &best, &acquire_in_progress, &error); |
818 | } | |
6f115638 | 819 | if (best || acquire_in_progress) |
08ec9af1 DM |
820 | goto found; |
821 | ||
8444cf71 | 822 | h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, encap_family); |
ae3fb6d3 | 823 | hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h_wildcard, bydst) { |
8444cf71 | 824 | if (x->props.family == encap_family && |
08ec9af1 | 825 | x->props.reqid == tmpl->reqid && |
3d6acfa7 | 826 | (mark & x->mark.m) == x->mark.v && |
08ec9af1 | 827 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
f59bbdfa | 828 | xfrm_addr_equal(&x->id.daddr, daddr, encap_family) && |
08ec9af1 DM |
829 | tmpl->mode == x->props.mode && |
830 | tmpl->id.proto == x->id.proto && | |
831 | (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) | |
1f673c5f | 832 | xfrm_state_look_at(pol, x, fl, encap_family, |
08ec9af1 | 833 | &best, &acquire_in_progress, &error); |
1da177e4 LT |
834 | } |
835 | ||
08ec9af1 | 836 | found: |
1da177e4 LT |
837 | x = best; |
838 | if (!x && !error && !acquire_in_progress) { | |
5c5d281a | 839 | if (tmpl->id.spi && |
bd55775c | 840 | (x0 = __xfrm_state_lookup(net, mark, daddr, tmpl->id.spi, |
8444cf71 | 841 | tmpl->id.proto, encap_family)) != NULL) { |
37b08e34 | 842 | to_put = x0; |
1da177e4 LT |
843 | error = -EEXIST; |
844 | goto out; | |
845 | } | |
0f24558e HG |
846 | |
847 | c.net = net; | |
848 | /* If the KMs have no listeners (yet...), avoid allocating an SA | |
849 | * for each and every packet - garbage collection might not | |
850 | * handle the flood. | |
851 | */ | |
852 | if (!km_is_alive(&c)) { | |
853 | error = -ESRCH; | |
854 | goto out; | |
855 | } | |
856 | ||
5447c5e4 | 857 | x = xfrm_state_alloc(net); |
1da177e4 LT |
858 | if (x == NULL) { |
859 | error = -ENOMEM; | |
860 | goto out; | |
861 | } | |
8444cf71 | 862 | /* Initialize temporary state matching only |
1da177e4 | 863 | * to current session. */ |
8444cf71 | 864 | xfrm_init_tempstate(x, fl, tmpl, daddr, saddr, family); |
bd55775c | 865 | memcpy(&x->mark, &pol->mark, sizeof(x->mark)); |
1da177e4 | 866 | |
1d28f42c | 867 | error = security_xfrm_state_alloc_acquire(x, pol->security, fl->flowi_secid); |
e0d1caa7 VY |
868 | if (error) { |
869 | x->km.state = XFRM_STATE_DEAD; | |
37b08e34 | 870 | to_put = x; |
e0d1caa7 VY |
871 | x = NULL; |
872 | goto out; | |
873 | } | |
874 | ||
1da177e4 | 875 | if (km_query(x, tmpl, pol) == 0) { |
d737a580 | 876 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 877 | x->km.state = XFRM_STATE_ACQ; |
5447c5e4 | 878 | list_add(&x->km.all, &net->xfrm.state_all); |
ae3fb6d3 | 879 | hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h); |
8444cf71 | 880 | h = xfrm_src_hash(net, daddr, saddr, encap_family); |
ae3fb6d3 | 881 | hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h); |
1da177e4 | 882 | if (x->id.spi) { |
8444cf71 | 883 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, encap_family); |
ae3fb6d3 | 884 | hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h); |
1da177e4 | 885 | } |
b27aeadb | 886 | x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires; |
9e0d57fd | 887 | tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL); |
5447c5e4 AD |
888 | net->xfrm.state_num++; |
889 | xfrm_hash_grow_check(net, x->bydst.next != NULL); | |
d737a580 | 890 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
891 | } else { |
892 | x->km.state = XFRM_STATE_DEAD; | |
37b08e34 | 893 | to_put = x; |
1da177e4 LT |
894 | x = NULL; |
895 | error = -ESRCH; | |
896 | } | |
897 | } | |
898 | out: | |
02efdff7 FW |
899 | if (x) { |
900 | if (!xfrm_state_hold_rcu(x)) { | |
901 | *err = -EAGAIN; | |
902 | x = NULL; | |
903 | } | |
904 | } else { | |
1da177e4 | 905 | *err = acquire_in_progress ? -EAGAIN : error; |
02efdff7 | 906 | } |
d737a580 | 907 | rcu_read_unlock(); |
37b08e34 DM |
908 | if (to_put) |
909 | xfrm_state_put(to_put); | |
b65e3d7b FW |
910 | |
911 | if (read_seqcount_retry(&xfrm_state_hash_generation, sequence)) { | |
912 | *err = -EAGAIN; | |
913 | if (x) { | |
914 | xfrm_state_put(x); | |
915 | x = NULL; | |
916 | } | |
917 | } | |
918 | ||
1da177e4 LT |
919 | return x; |
920 | } | |
921 | ||
628529b6 | 922 | struct xfrm_state * |
bd55775c | 923 | xfrm_stateonly_find(struct net *net, u32 mark, |
5447c5e4 | 924 | xfrm_address_t *daddr, xfrm_address_t *saddr, |
628529b6 JHS |
925 | unsigned short family, u8 mode, u8 proto, u32 reqid) |
926 | { | |
4bda4f25 | 927 | unsigned int h; |
628529b6 | 928 | struct xfrm_state *rx = NULL, *x = NULL; |
628529b6 | 929 | |
4ae770bf | 930 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
5447c5e4 | 931 | h = xfrm_dst_hash(net, daddr, saddr, reqid, family); |
b67bfe0d | 932 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
628529b6 JHS |
933 | if (x->props.family == family && |
934 | x->props.reqid == reqid && | |
3d6acfa7 | 935 | (mark & x->mark.m) == x->mark.v && |
628529b6 JHS |
936 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
937 | xfrm_state_addr_check(x, daddr, saddr, family) && | |
938 | mode == x->props.mode && | |
939 | proto == x->id.proto && | |
940 | x->km.state == XFRM_STATE_VALID) { | |
941 | rx = x; | |
942 | break; | |
943 | } | |
944 | } | |
945 | ||
946 | if (rx) | |
947 | xfrm_state_hold(rx); | |
4ae770bf | 948 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
628529b6 JHS |
949 | |
950 | ||
951 | return rx; | |
952 | } | |
953 | EXPORT_SYMBOL(xfrm_stateonly_find); | |
954 | ||
c454997e FD |
955 | struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi, |
956 | unsigned short family) | |
957 | { | |
958 | struct xfrm_state *x; | |
959 | struct xfrm_state_walk *w; | |
960 | ||
961 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
962 | list_for_each_entry(w, &net->xfrm.state_all, all) { | |
963 | x = container_of(w, struct xfrm_state, km); | |
964 | if (x->props.family != family || | |
965 | x->id.spi != spi) | |
966 | continue; | |
967 | ||
c454997e | 968 | xfrm_state_hold(x); |
bdddbf69 | 969 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
c454997e FD |
970 | return x; |
971 | } | |
972 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); | |
973 | return NULL; | |
974 | } | |
975 | EXPORT_SYMBOL(xfrm_state_lookup_byspi); | |
976 | ||
1da177e4 LT |
977 | static void __xfrm_state_insert(struct xfrm_state *x) |
978 | { | |
98806f75 | 979 | struct net *net = xs_net(x); |
a624c108 | 980 | unsigned int h; |
1da177e4 | 981 | |
98806f75 | 982 | list_add(&x->km.all, &net->xfrm.state_all); |
4c563f76 | 983 | |
98806f75 | 984 | h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr, |
c1969f29 | 985 | x->props.reqid, x->props.family); |
ae3fb6d3 | 986 | hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h); |
1da177e4 | 987 | |
98806f75 | 988 | h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family); |
ae3fb6d3 | 989 | hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h); |
1da177e4 | 990 | |
7b4dc360 | 991 | if (x->id.spi) { |
98806f75 | 992 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, |
6c44e6b7 MN |
993 | x->props.family); |
994 | ||
ae3fb6d3 | 995 | hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h); |
6c44e6b7 MN |
996 | } |
997 | ||
9e0d57fd | 998 | tasklet_hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL); |
a47f0ce0 DM |
999 | if (x->replay_maxage) |
1000 | mod_timer(&x->rtimer, jiffies + x->replay_maxage); | |
f8cd5488 | 1001 | |
98806f75 | 1002 | net->xfrm.state_num++; |
f034b5d4 | 1003 | |
98806f75 | 1004 | xfrm_hash_grow_check(net, x->bydst.next != NULL); |
1da177e4 LT |
1005 | } |
1006 | ||
283bc9f3 | 1007 | /* net->xfrm.xfrm_state_lock is held */ |
c7f5ea3a DM |
1008 | static void __xfrm_state_bump_genids(struct xfrm_state *xnew) |
1009 | { | |
98806f75 | 1010 | struct net *net = xs_net(xnew); |
c7f5ea3a DM |
1011 | unsigned short family = xnew->props.family; |
1012 | u32 reqid = xnew->props.reqid; | |
1013 | struct xfrm_state *x; | |
c7f5ea3a | 1014 | unsigned int h; |
3d6acfa7 | 1015 | u32 mark = xnew->mark.v & xnew->mark.m; |
c7f5ea3a | 1016 | |
98806f75 | 1017 | h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family); |
b67bfe0d | 1018 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
c7f5ea3a DM |
1019 | if (x->props.family == family && |
1020 | x->props.reqid == reqid && | |
3d6acfa7 | 1021 | (mark & x->mark.m) == x->mark.v && |
70e94e66 YH |
1022 | xfrm_addr_equal(&x->id.daddr, &xnew->id.daddr, family) && |
1023 | xfrm_addr_equal(&x->props.saddr, &xnew->props.saddr, family)) | |
34996cb9 | 1024 | x->genid++; |
c7f5ea3a DM |
1025 | } |
1026 | } | |
1027 | ||
1da177e4 LT |
1028 | void xfrm_state_insert(struct xfrm_state *x) |
1029 | { | |
283bc9f3 FD |
1030 | struct net *net = xs_net(x); |
1031 | ||
1032 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
c7f5ea3a | 1033 | __xfrm_state_bump_genids(x); |
1da177e4 | 1034 | __xfrm_state_insert(x); |
283bc9f3 | 1035 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1036 | } |
1037 | EXPORT_SYMBOL(xfrm_state_insert); | |
1038 | ||
283bc9f3 | 1039 | /* net->xfrm.xfrm_state_lock is held */ |
e473fcb4 MK |
1040 | static struct xfrm_state *__find_acq_core(struct net *net, |
1041 | const struct xfrm_mark *m, | |
a70486f0 DM |
1042 | unsigned short family, u8 mode, |
1043 | u32 reqid, u8 proto, | |
1044 | const xfrm_address_t *daddr, | |
e473fcb4 MK |
1045 | const xfrm_address_t *saddr, |
1046 | int create) | |
2770834c | 1047 | { |
5447c5e4 | 1048 | unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family); |
2770834c | 1049 | struct xfrm_state *x; |
3d6acfa7 | 1050 | u32 mark = m->v & m->m; |
2770834c | 1051 | |
b67bfe0d | 1052 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
2770834c DM |
1053 | if (x->props.reqid != reqid || |
1054 | x->props.mode != mode || | |
1055 | x->props.family != family || | |
1056 | x->km.state != XFRM_STATE_ACQ || | |
75e252d9 | 1057 | x->id.spi != 0 || |
1802571b | 1058 | x->id.proto != proto || |
3d6acfa7 | 1059 | (mark & x->mark.m) != x->mark.v || |
70e94e66 YH |
1060 | !xfrm_addr_equal(&x->id.daddr, daddr, family) || |
1061 | !xfrm_addr_equal(&x->props.saddr, saddr, family)) | |
2770834c DM |
1062 | continue; |
1063 | ||
2770834c DM |
1064 | xfrm_state_hold(x); |
1065 | return x; | |
1066 | } | |
1067 | ||
1068 | if (!create) | |
1069 | return NULL; | |
1070 | ||
5447c5e4 | 1071 | x = xfrm_state_alloc(net); |
2770834c DM |
1072 | if (likely(x)) { |
1073 | switch (family) { | |
1074 | case AF_INET: | |
1075 | x->sel.daddr.a4 = daddr->a4; | |
1076 | x->sel.saddr.a4 = saddr->a4; | |
1077 | x->sel.prefixlen_d = 32; | |
1078 | x->sel.prefixlen_s = 32; | |
1079 | x->props.saddr.a4 = saddr->a4; | |
1080 | x->id.daddr.a4 = daddr->a4; | |
1081 | break; | |
1082 | ||
1083 | case AF_INET6: | |
15e318bd JB |
1084 | x->sel.daddr.in6 = daddr->in6; |
1085 | x->sel.saddr.in6 = saddr->in6; | |
2770834c DM |
1086 | x->sel.prefixlen_d = 128; |
1087 | x->sel.prefixlen_s = 128; | |
15e318bd JB |
1088 | x->props.saddr.in6 = saddr->in6; |
1089 | x->id.daddr.in6 = daddr->in6; | |
2770834c | 1090 | break; |
3ff50b79 | 1091 | } |
2770834c DM |
1092 | |
1093 | x->km.state = XFRM_STATE_ACQ; | |
1094 | x->id.proto = proto; | |
1095 | x->props.family = family; | |
1096 | x->props.mode = mode; | |
1097 | x->props.reqid = reqid; | |
bd55775c JHS |
1098 | x->mark.v = m->v; |
1099 | x->mark.m = m->m; | |
b27aeadb | 1100 | x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires; |
2770834c | 1101 | xfrm_state_hold(x); |
9e0d57fd | 1102 | tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL); |
5447c5e4 | 1103 | list_add(&x->km.all, &net->xfrm.state_all); |
ae3fb6d3 | 1104 | hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h); |
5447c5e4 | 1105 | h = xfrm_src_hash(net, daddr, saddr, family); |
ae3fb6d3 | 1106 | hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h); |
918049f0 | 1107 | |
5447c5e4 | 1108 | net->xfrm.state_num++; |
918049f0 | 1109 | |
5447c5e4 | 1110 | xfrm_hash_grow_check(net, x->bydst.next != NULL); |
2770834c DM |
1111 | } |
1112 | ||
1113 | return x; | |
1114 | } | |
1115 | ||
bd55775c | 1116 | static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); |
1da177e4 LT |
1117 | |
1118 | int xfrm_state_add(struct xfrm_state *x) | |
1119 | { | |
5447c5e4 | 1120 | struct net *net = xs_net(x); |
37b08e34 | 1121 | struct xfrm_state *x1, *to_put; |
1da177e4 LT |
1122 | int family; |
1123 | int err; | |
bd55775c | 1124 | u32 mark = x->mark.v & x->mark.m; |
eb2971b6 | 1125 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
1da177e4 LT |
1126 | |
1127 | family = x->props.family; | |
1da177e4 | 1128 | |
37b08e34 DM |
1129 | to_put = NULL; |
1130 | ||
283bc9f3 | 1131 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 1132 | |
edcd5821 | 1133 | x1 = __xfrm_state_locate(x, use_spi, family); |
1da177e4 | 1134 | if (x1) { |
37b08e34 | 1135 | to_put = x1; |
1da177e4 LT |
1136 | x1 = NULL; |
1137 | err = -EEXIST; | |
1138 | goto out; | |
1139 | } | |
1140 | ||
eb2971b6 | 1141 | if (use_spi && x->km.seq) { |
bd55775c | 1142 | x1 = __xfrm_find_acq_byseq(net, mark, x->km.seq); |
75e252d9 | 1143 | if (x1 && ((x1->id.proto != x->id.proto) || |
70e94e66 | 1144 | !xfrm_addr_equal(&x1->id.daddr, &x->id.daddr, family))) { |
37b08e34 | 1145 | to_put = x1; |
1da177e4 LT |
1146 | x1 = NULL; |
1147 | } | |
1148 | } | |
1149 | ||
eb2971b6 | 1150 | if (use_spi && !x1) |
bd55775c JHS |
1151 | x1 = __find_acq_core(net, &x->mark, family, x->props.mode, |
1152 | x->props.reqid, x->id.proto, | |
2770834c | 1153 | &x->id.daddr, &x->props.saddr, 0); |
1da177e4 | 1154 | |
c7f5ea3a | 1155 | __xfrm_state_bump_genids(x); |
1da177e4 LT |
1156 | __xfrm_state_insert(x); |
1157 | err = 0; | |
1158 | ||
1159 | out: | |
283bc9f3 | 1160 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1161 | |
1162 | if (x1) { | |
1163 | xfrm_state_delete(x1); | |
1164 | xfrm_state_put(x1); | |
1165 | } | |
1166 | ||
37b08e34 DM |
1167 | if (to_put) |
1168 | xfrm_state_put(to_put); | |
1169 | ||
1da177e4 LT |
1170 | return err; |
1171 | } | |
1172 | EXPORT_SYMBOL(xfrm_state_add); | |
1173 | ||
80c9abaa | 1174 | #ifdef CONFIG_XFRM_MIGRATE |
cc9ab60e | 1175 | static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig) |
80c9abaa | 1176 | { |
98806f75 | 1177 | struct net *net = xs_net(orig); |
98806f75 | 1178 | struct xfrm_state *x = xfrm_state_alloc(net); |
80c9abaa | 1179 | if (!x) |
553f9118 | 1180 | goto out; |
80c9abaa SS |
1181 | |
1182 | memcpy(&x->id, &orig->id, sizeof(x->id)); | |
1183 | memcpy(&x->sel, &orig->sel, sizeof(x->sel)); | |
1184 | memcpy(&x->lft, &orig->lft, sizeof(x->lft)); | |
1185 | x->props.mode = orig->props.mode; | |
1186 | x->props.replay_window = orig->props.replay_window; | |
1187 | x->props.reqid = orig->props.reqid; | |
1188 | x->props.family = orig->props.family; | |
1189 | x->props.saddr = orig->props.saddr; | |
1190 | ||
1191 | if (orig->aalg) { | |
4447bb33 | 1192 | x->aalg = xfrm_algo_auth_clone(orig->aalg); |
80c9abaa SS |
1193 | if (!x->aalg) |
1194 | goto error; | |
1195 | } | |
1196 | x->props.aalgo = orig->props.aalgo; | |
1197 | ||
ee5c2317 SK |
1198 | if (orig->aead) { |
1199 | x->aead = xfrm_algo_aead_clone(orig->aead); | |
1200 | if (!x->aead) | |
1201 | goto error; | |
1202 | } | |
80c9abaa SS |
1203 | if (orig->ealg) { |
1204 | x->ealg = xfrm_algo_clone(orig->ealg); | |
1205 | if (!x->ealg) | |
1206 | goto error; | |
1207 | } | |
1208 | x->props.ealgo = orig->props.ealgo; | |
1209 | ||
1210 | if (orig->calg) { | |
1211 | x->calg = xfrm_algo_clone(orig->calg); | |
1212 | if (!x->calg) | |
1213 | goto error; | |
1214 | } | |
1215 | x->props.calgo = orig->props.calgo; | |
1216 | ||
a716c119 | 1217 | if (orig->encap) { |
80c9abaa SS |
1218 | x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL); |
1219 | if (!x->encap) | |
1220 | goto error; | |
1221 | } | |
1222 | ||
1223 | if (orig->coaddr) { | |
1224 | x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr), | |
1225 | GFP_KERNEL); | |
1226 | if (!x->coaddr) | |
1227 | goto error; | |
1228 | } | |
1229 | ||
af2f464e | 1230 | if (orig->replay_esn) { |
cc9ab60e | 1231 | if (xfrm_replay_clone(x, orig)) |
af2f464e SK |
1232 | goto error; |
1233 | } | |
1234 | ||
bd55775c JHS |
1235 | memcpy(&x->mark, &orig->mark, sizeof(x->mark)); |
1236 | ||
cc9ab60e | 1237 | if (xfrm_init_state(x) < 0) |
80c9abaa SS |
1238 | goto error; |
1239 | ||
1240 | x->props.flags = orig->props.flags; | |
a947b0a9 | 1241 | x->props.extra_flags = orig->props.extra_flags; |
80c9abaa | 1242 | |
ee5c2317 SK |
1243 | x->tfcpad = orig->tfcpad; |
1244 | x->replay_maxdiff = orig->replay_maxdiff; | |
1245 | x->replay_maxage = orig->replay_maxage; | |
80c9abaa SS |
1246 | x->curlft.add_time = orig->curlft.add_time; |
1247 | x->km.state = orig->km.state; | |
1248 | x->km.seq = orig->km.seq; | |
1249 | ||
1250 | return x; | |
1251 | ||
1252 | error: | |
553f9118 HX |
1253 | xfrm_state_put(x); |
1254 | out: | |
80c9abaa SS |
1255 | return NULL; |
1256 | } | |
80c9abaa | 1257 | |
283bc9f3 | 1258 | struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net) |
80c9abaa SS |
1259 | { |
1260 | unsigned int h; | |
8c0cba22 SK |
1261 | struct xfrm_state *x = NULL; |
1262 | ||
1263 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
80c9abaa SS |
1264 | |
1265 | if (m->reqid) { | |
283bc9f3 | 1266 | h = xfrm_dst_hash(net, &m->old_daddr, &m->old_saddr, |
80c9abaa | 1267 | m->reqid, m->old_family); |
283bc9f3 | 1268 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
80c9abaa SS |
1269 | if (x->props.mode != m->mode || |
1270 | x->id.proto != m->proto) | |
1271 | continue; | |
1272 | if (m->reqid && x->props.reqid != m->reqid) | |
1273 | continue; | |
70e94e66 YH |
1274 | if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr, |
1275 | m->old_family) || | |
1276 | !xfrm_addr_equal(&x->props.saddr, &m->old_saddr, | |
1277 | m->old_family)) | |
80c9abaa SS |
1278 | continue; |
1279 | xfrm_state_hold(x); | |
8c0cba22 | 1280 | break; |
80c9abaa SS |
1281 | } |
1282 | } else { | |
283bc9f3 | 1283 | h = xfrm_src_hash(net, &m->old_daddr, &m->old_saddr, |
80c9abaa | 1284 | m->old_family); |
283bc9f3 | 1285 | hlist_for_each_entry(x, net->xfrm.state_bysrc+h, bysrc) { |
80c9abaa SS |
1286 | if (x->props.mode != m->mode || |
1287 | x->id.proto != m->proto) | |
1288 | continue; | |
70e94e66 YH |
1289 | if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr, |
1290 | m->old_family) || | |
1291 | !xfrm_addr_equal(&x->props.saddr, &m->old_saddr, | |
1292 | m->old_family)) | |
80c9abaa SS |
1293 | continue; |
1294 | xfrm_state_hold(x); | |
8c0cba22 | 1295 | break; |
80c9abaa SS |
1296 | } |
1297 | } | |
1298 | ||
8c0cba22 SK |
1299 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1300 | ||
1301 | return x; | |
80c9abaa SS |
1302 | } |
1303 | EXPORT_SYMBOL(xfrm_migrate_state_find); | |
1304 | ||
3e94c2dc WC |
1305 | struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, |
1306 | struct xfrm_migrate *m) | |
80c9abaa SS |
1307 | { |
1308 | struct xfrm_state *xc; | |
80c9abaa | 1309 | |
cc9ab60e | 1310 | xc = xfrm_state_clone(x); |
80c9abaa SS |
1311 | if (!xc) |
1312 | return NULL; | |
1313 | ||
1314 | memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr)); | |
1315 | memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr)); | |
1316 | ||
1317 | /* add state */ | |
70e94e66 | 1318 | if (xfrm_addr_equal(&x->id.daddr, &m->new_daddr, m->new_family)) { |
80c9abaa SS |
1319 | /* a care is needed when the destination address of the |
1320 | state is to be updated as it is a part of triplet */ | |
1321 | xfrm_state_insert(xc); | |
1322 | } else { | |
cc9ab60e | 1323 | if (xfrm_state_add(xc) < 0) |
80c9abaa SS |
1324 | goto error; |
1325 | } | |
1326 | ||
1327 | return xc; | |
1328 | error: | |
78347c8c | 1329 | xfrm_state_put(xc); |
80c9abaa SS |
1330 | return NULL; |
1331 | } | |
1332 | EXPORT_SYMBOL(xfrm_state_migrate); | |
1333 | #endif | |
1334 | ||
1da177e4 LT |
1335 | int xfrm_state_update(struct xfrm_state *x) |
1336 | { | |
37b08e34 | 1337 | struct xfrm_state *x1, *to_put; |
1da177e4 | 1338 | int err; |
eb2971b6 | 1339 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
283bc9f3 | 1340 | struct net *net = xs_net(x); |
1da177e4 | 1341 | |
37b08e34 DM |
1342 | to_put = NULL; |
1343 | ||
283bc9f3 | 1344 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
edcd5821 | 1345 | x1 = __xfrm_state_locate(x, use_spi, x->props.family); |
1da177e4 LT |
1346 | |
1347 | err = -ESRCH; | |
1348 | if (!x1) | |
1349 | goto out; | |
1350 | ||
1351 | if (xfrm_state_kern(x1)) { | |
37b08e34 | 1352 | to_put = x1; |
1da177e4 LT |
1353 | err = -EEXIST; |
1354 | goto out; | |
1355 | } | |
1356 | ||
1357 | if (x1->km.state == XFRM_STATE_ACQ) { | |
1358 | __xfrm_state_insert(x); | |
1359 | x = NULL; | |
1360 | } | |
1361 | err = 0; | |
1362 | ||
1363 | out: | |
283bc9f3 | 1364 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 1365 | |
37b08e34 DM |
1366 | if (to_put) |
1367 | xfrm_state_put(to_put); | |
1368 | ||
1da177e4 LT |
1369 | if (err) |
1370 | return err; | |
1371 | ||
1372 | if (!x) { | |
1373 | xfrm_state_delete(x1); | |
1374 | xfrm_state_put(x1); | |
1375 | return 0; | |
1376 | } | |
1377 | ||
1378 | err = -EINVAL; | |
1379 | spin_lock_bh(&x1->lock); | |
1380 | if (likely(x1->km.state == XFRM_STATE_VALID)) { | |
1381 | if (x->encap && x1->encap) | |
1382 | memcpy(x1->encap, x->encap, sizeof(*x1->encap)); | |
060f02a3 NT |
1383 | if (x->coaddr && x1->coaddr) { |
1384 | memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr)); | |
1385 | } | |
1386 | if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel))) | |
1387 | memcpy(&x1->sel, &x->sel, sizeof(x1->sel)); | |
1da177e4 LT |
1388 | memcpy(&x1->lft, &x->lft, sizeof(x1->lft)); |
1389 | x1->km.dying = 0; | |
1390 | ||
9e0d57fd | 1391 | tasklet_hrtimer_start(&x1->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL); |
1da177e4 LT |
1392 | if (x1->curlft.use_time) |
1393 | xfrm_state_check_expire(x1); | |
1394 | ||
1395 | err = 0; | |
8fcbc637 TG |
1396 | x->km.state = XFRM_STATE_DEAD; |
1397 | __xfrm_state_put(x); | |
1da177e4 LT |
1398 | } |
1399 | spin_unlock_bh(&x1->lock); | |
1400 | ||
1401 | xfrm_state_put(x1); | |
1402 | ||
1403 | return err; | |
1404 | } | |
1405 | EXPORT_SYMBOL(xfrm_state_update); | |
1406 | ||
1407 | int xfrm_state_check_expire(struct xfrm_state *x) | |
1408 | { | |
1409 | if (!x->curlft.use_time) | |
9d729f72 | 1410 | x->curlft.use_time = get_seconds(); |
1da177e4 | 1411 | |
1da177e4 LT |
1412 | if (x->curlft.bytes >= x->lft.hard_byte_limit || |
1413 | x->curlft.packets >= x->lft.hard_packet_limit) { | |
4666faab | 1414 | x->km.state = XFRM_STATE_EXPIRED; |
9b7a787d | 1415 | tasklet_hrtimer_start(&x->mtimer, ktime_set(0, 0), HRTIMER_MODE_REL); |
1da177e4 LT |
1416 | return -EINVAL; |
1417 | } | |
1418 | ||
1419 | if (!x->km.dying && | |
1420 | (x->curlft.bytes >= x->lft.soft_byte_limit || | |
4666faab HX |
1421 | x->curlft.packets >= x->lft.soft_packet_limit)) { |
1422 | x->km.dying = 1; | |
53bc6b4d | 1423 | km_state_expired(x, 0, 0); |
4666faab | 1424 | } |
1da177e4 LT |
1425 | return 0; |
1426 | } | |
1427 | EXPORT_SYMBOL(xfrm_state_check_expire); | |
1428 | ||
1da177e4 | 1429 | struct xfrm_state * |
a70486f0 | 1430 | xfrm_state_lookup(struct net *net, u32 mark, const xfrm_address_t *daddr, __be32 spi, |
bd55775c | 1431 | u8 proto, unsigned short family) |
1da177e4 LT |
1432 | { |
1433 | struct xfrm_state *x; | |
1da177e4 | 1434 | |
c2f672fc | 1435 | rcu_read_lock(); |
bd55775c | 1436 | x = __xfrm_state_lookup(net, mark, daddr, spi, proto, family); |
c2f672fc | 1437 | rcu_read_unlock(); |
1da177e4 LT |
1438 | return x; |
1439 | } | |
1440 | EXPORT_SYMBOL(xfrm_state_lookup); | |
1441 | ||
1442 | struct xfrm_state * | |
bd55775c | 1443 | xfrm_state_lookup_byaddr(struct net *net, u32 mark, |
a70486f0 | 1444 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
eb2971b6 MN |
1445 | u8 proto, unsigned short family) |
1446 | { | |
1447 | struct xfrm_state *x; | |
eb2971b6 | 1448 | |
283bc9f3 | 1449 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1450 | x = __xfrm_state_lookup_byaddr(net, mark, daddr, saddr, proto, family); |
283bc9f3 | 1451 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
eb2971b6 MN |
1452 | return x; |
1453 | } | |
1454 | EXPORT_SYMBOL(xfrm_state_lookup_byaddr); | |
1455 | ||
1456 | struct xfrm_state * | |
e473fcb4 MK |
1457 | xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, u8 mode, u32 reqid, |
1458 | u8 proto, const xfrm_address_t *daddr, | |
1459 | const xfrm_address_t *saddr, int create, unsigned short family) | |
1da177e4 LT |
1460 | { |
1461 | struct xfrm_state *x; | |
1da177e4 | 1462 | |
283bc9f3 | 1463 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1464 | x = __find_acq_core(net, mark, family, mode, reqid, proto, daddr, saddr, create); |
283bc9f3 | 1465 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
2770834c | 1466 | |
1da177e4 LT |
1467 | return x; |
1468 | } | |
1469 | EXPORT_SYMBOL(xfrm_find_acq); | |
1470 | ||
41a49cc3 MN |
1471 | #ifdef CONFIG_XFRM_SUB_POLICY |
1472 | int | |
1473 | xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, | |
283bc9f3 | 1474 | unsigned short family, struct net *net) |
41a49cc3 MN |
1475 | { |
1476 | int err = 0; | |
1477 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
1478 | if (!afinfo) | |
1479 | return -EAFNOSUPPORT; | |
1480 | ||
283bc9f3 | 1481 | spin_lock_bh(&net->xfrm.xfrm_state_lock); /*FIXME*/ |
41a49cc3 MN |
1482 | if (afinfo->tmpl_sort) |
1483 | err = afinfo->tmpl_sort(dst, src, n); | |
283bc9f3 | 1484 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
41a49cc3 MN |
1485 | xfrm_state_put_afinfo(afinfo); |
1486 | return err; | |
1487 | } | |
1488 | EXPORT_SYMBOL(xfrm_tmpl_sort); | |
1489 | ||
1490 | int | |
1491 | xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, | |
1492 | unsigned short family) | |
1493 | { | |
1494 | int err = 0; | |
1495 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
35ea790d | 1496 | struct net *net = xs_net(*src); |
283bc9f3 | 1497 | |
41a49cc3 MN |
1498 | if (!afinfo) |
1499 | return -EAFNOSUPPORT; | |
1500 | ||
283bc9f3 | 1501 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
41a49cc3 MN |
1502 | if (afinfo->state_sort) |
1503 | err = afinfo->state_sort(dst, src, n); | |
283bc9f3 | 1504 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
41a49cc3 MN |
1505 | xfrm_state_put_afinfo(afinfo); |
1506 | return err; | |
1507 | } | |
1508 | EXPORT_SYMBOL(xfrm_state_sort); | |
1509 | #endif | |
1510 | ||
1da177e4 LT |
1511 | /* Silly enough, but I'm lazy to build resolution list */ |
1512 | ||
bd55775c | 1513 | static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq) |
1da177e4 LT |
1514 | { |
1515 | int i; | |
1da177e4 | 1516 | |
5447c5e4 | 1517 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
8f126e37 DM |
1518 | struct xfrm_state *x; |
1519 | ||
b67bfe0d | 1520 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
8f126e37 | 1521 | if (x->km.seq == seq && |
3d6acfa7 | 1522 | (mark & x->mark.m) == x->mark.v && |
8f126e37 | 1523 | x->km.state == XFRM_STATE_ACQ) { |
1da177e4 LT |
1524 | xfrm_state_hold(x); |
1525 | return x; | |
1526 | } | |
1527 | } | |
1528 | } | |
1529 | return NULL; | |
1530 | } | |
1531 | ||
bd55775c | 1532 | struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq) |
1da177e4 LT |
1533 | { |
1534 | struct xfrm_state *x; | |
1535 | ||
283bc9f3 | 1536 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1537 | x = __xfrm_find_acq_byseq(net, mark, seq); |
283bc9f3 | 1538 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1539 | return x; |
1540 | } | |
1541 | EXPORT_SYMBOL(xfrm_find_acq_byseq); | |
1542 | ||
1543 | u32 xfrm_get_acqseq(void) | |
1544 | { | |
1545 | u32 res; | |
6836b9bd | 1546 | static atomic_t acqseq; |
1547 | ||
1548 | do { | |
1549 | res = atomic_inc_return(&acqseq); | |
1550 | } while (!res); | |
1da177e4 | 1551 | |
1da177e4 LT |
1552 | return res; |
1553 | } | |
1554 | EXPORT_SYMBOL(xfrm_get_acqseq); | |
1555 | ||
776e9dd9 FD |
1556 | int verify_spi_info(u8 proto, u32 min, u32 max) |
1557 | { | |
1558 | switch (proto) { | |
1559 | case IPPROTO_AH: | |
1560 | case IPPROTO_ESP: | |
1561 | break; | |
1562 | ||
1563 | case IPPROTO_COMP: | |
1564 | /* IPCOMP spi is 16-bits. */ | |
1565 | if (max >= 0x10000) | |
1566 | return -EINVAL; | |
1567 | break; | |
1568 | ||
1569 | default: | |
1570 | return -EINVAL; | |
1571 | } | |
1572 | ||
1573 | if (min > max) | |
1574 | return -EINVAL; | |
1575 | ||
1576 | return 0; | |
1577 | } | |
1578 | EXPORT_SYMBOL(verify_spi_info); | |
1579 | ||
658b219e | 1580 | int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high) |
1da177e4 | 1581 | { |
221df1ed | 1582 | struct net *net = xs_net(x); |
f034b5d4 | 1583 | unsigned int h; |
1da177e4 | 1584 | struct xfrm_state *x0; |
658b219e HX |
1585 | int err = -ENOENT; |
1586 | __be32 minspi = htonl(low); | |
1587 | __be32 maxspi = htonl(high); | |
bd55775c | 1588 | u32 mark = x->mark.v & x->mark.m; |
1da177e4 | 1589 | |
658b219e HX |
1590 | spin_lock_bh(&x->lock); |
1591 | if (x->km.state == XFRM_STATE_DEAD) | |
1592 | goto unlock; | |
1593 | ||
1594 | err = 0; | |
1da177e4 | 1595 | if (x->id.spi) |
658b219e HX |
1596 | goto unlock; |
1597 | ||
1598 | err = -ENOENT; | |
1da177e4 LT |
1599 | |
1600 | if (minspi == maxspi) { | |
bd55775c | 1601 | x0 = xfrm_state_lookup(net, mark, &x->id.daddr, minspi, x->id.proto, x->props.family); |
1da177e4 LT |
1602 | if (x0) { |
1603 | xfrm_state_put(x0); | |
658b219e | 1604 | goto unlock; |
1da177e4 LT |
1605 | } |
1606 | x->id.spi = minspi; | |
1607 | } else { | |
1608 | u32 spi = 0; | |
9b7a787d | 1609 | for (h = 0; h < high-low+1; h++) { |
63862b5b | 1610 | spi = low + prandom_u32()%(high-low+1); |
bd55775c | 1611 | x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family); |
1da177e4 LT |
1612 | if (x0 == NULL) { |
1613 | x->id.spi = htonl(spi); | |
1614 | break; | |
1615 | } | |
1616 | xfrm_state_put(x0); | |
1617 | } | |
1618 | } | |
1619 | if (x->id.spi) { | |
283bc9f3 | 1620 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12604d8a | 1621 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family); |
ae3fb6d3 | 1622 | hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h); |
283bc9f3 | 1623 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
658b219e HX |
1624 | |
1625 | err = 0; | |
1da177e4 | 1626 | } |
658b219e HX |
1627 | |
1628 | unlock: | |
1629 | spin_unlock_bh(&x->lock); | |
1630 | ||
1631 | return err; | |
1da177e4 LT |
1632 | } |
1633 | EXPORT_SYMBOL(xfrm_alloc_spi); | |
1634 | ||
d3623099 | 1635 | static bool __xfrm_state_filter_match(struct xfrm_state *x, |
870a2df4 | 1636 | struct xfrm_address_filter *filter) |
d3623099 ND |
1637 | { |
1638 | if (filter) { | |
1639 | if ((filter->family == AF_INET || | |
1640 | filter->family == AF_INET6) && | |
1641 | x->props.family != filter->family) | |
1642 | return false; | |
1643 | ||
1644 | return addr_match(&x->props.saddr, &filter->saddr, | |
1645 | filter->splen) && | |
1646 | addr_match(&x->id.daddr, &filter->daddr, | |
1647 | filter->dplen); | |
1648 | } | |
1649 | return true; | |
1650 | } | |
1651 | ||
284fa7da | 1652 | int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, |
4c563f76 | 1653 | int (*func)(struct xfrm_state *, int, void*), |
1da177e4 LT |
1654 | void *data) |
1655 | { | |
12a169e7 HX |
1656 | struct xfrm_state *state; |
1657 | struct xfrm_state_walk *x; | |
1da177e4 LT |
1658 | int err = 0; |
1659 | ||
12a169e7 | 1660 | if (walk->seq != 0 && list_empty(&walk->all)) |
4c563f76 TT |
1661 | return 0; |
1662 | ||
283bc9f3 | 1663 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12a169e7 | 1664 | if (list_empty(&walk->all)) |
284fa7da | 1665 | x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all); |
12a169e7 | 1666 | else |
80077702 | 1667 | x = list_first_entry(&walk->all, struct xfrm_state_walk, all); |
284fa7da | 1668 | list_for_each_entry_from(x, &net->xfrm.state_all, all) { |
12a169e7 | 1669 | if (x->state == XFRM_STATE_DEAD) |
4c563f76 | 1670 | continue; |
12a169e7 HX |
1671 | state = container_of(x, struct xfrm_state, km); |
1672 | if (!xfrm_id_proto_match(state->id.proto, walk->proto)) | |
4c563f76 | 1673 | continue; |
d3623099 ND |
1674 | if (!__xfrm_state_filter_match(state, walk->filter)) |
1675 | continue; | |
12a169e7 HX |
1676 | err = func(state, walk->seq, data); |
1677 | if (err) { | |
1678 | list_move_tail(&walk->all, &x->all); | |
1679 | goto out; | |
1da177e4 | 1680 | } |
12a169e7 | 1681 | walk->seq++; |
1da177e4 | 1682 | } |
12a169e7 | 1683 | if (walk->seq == 0) { |
1da177e4 LT |
1684 | err = -ENOENT; |
1685 | goto out; | |
1686 | } | |
12a169e7 | 1687 | list_del_init(&walk->all); |
1da177e4 | 1688 | out: |
283bc9f3 | 1689 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1690 | return err; |
1691 | } | |
1692 | EXPORT_SYMBOL(xfrm_state_walk); | |
1693 | ||
d3623099 | 1694 | void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto, |
870a2df4 | 1695 | struct xfrm_address_filter *filter) |
5c182458 | 1696 | { |
12a169e7 | 1697 | INIT_LIST_HEAD(&walk->all); |
5c182458 | 1698 | walk->proto = proto; |
12a169e7 HX |
1699 | walk->state = XFRM_STATE_DEAD; |
1700 | walk->seq = 0; | |
d3623099 | 1701 | walk->filter = filter; |
5c182458 HX |
1702 | } |
1703 | EXPORT_SYMBOL(xfrm_state_walk_init); | |
1704 | ||
283bc9f3 | 1705 | void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net) |
abb81c4f | 1706 | { |
d3623099 ND |
1707 | kfree(walk->filter); |
1708 | ||
12a169e7 | 1709 | if (list_empty(&walk->all)) |
5c182458 | 1710 | return; |
5c182458 | 1711 | |
283bc9f3 | 1712 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12a169e7 | 1713 | list_del(&walk->all); |
283bc9f3 | 1714 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
abb81c4f HX |
1715 | } |
1716 | EXPORT_SYMBOL(xfrm_state_walk_done); | |
1717 | ||
f8cd5488 JHS |
1718 | static void xfrm_replay_timer_handler(unsigned long data) |
1719 | { | |
3e94c2dc | 1720 | struct xfrm_state *x = (struct xfrm_state *)data; |
f8cd5488 JHS |
1721 | |
1722 | spin_lock(&x->lock); | |
1723 | ||
2717096a | 1724 | if (x->km.state == XFRM_STATE_VALID) { |
a6483b79 | 1725 | if (xfrm_aevent_is_on(xs_net(x))) |
9fdc4883 | 1726 | x->repl->notify(x, XFRM_REPLAY_TIMEOUT); |
2717096a JHS |
1727 | else |
1728 | x->xflags |= XFRM_TIME_DEFER; | |
1729 | } | |
f8cd5488 JHS |
1730 | |
1731 | spin_unlock(&x->lock); | |
1732 | } | |
1733 | ||
df01812e | 1734 | static LIST_HEAD(xfrm_km_list); |
1da177e4 | 1735 | |
214e005b | 1736 | void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
1da177e4 LT |
1737 | { |
1738 | struct xfrm_mgr *km; | |
1739 | ||
85168c00 CW |
1740 | rcu_read_lock(); |
1741 | list_for_each_entry_rcu(km, &xfrm_km_list, list) | |
26b15dad JHS |
1742 | if (km->notify_policy) |
1743 | km->notify_policy(xp, dir, c); | |
85168c00 | 1744 | rcu_read_unlock(); |
26b15dad | 1745 | } |
1da177e4 | 1746 | |
214e005b | 1747 | void km_state_notify(struct xfrm_state *x, const struct km_event *c) |
26b15dad JHS |
1748 | { |
1749 | struct xfrm_mgr *km; | |
85168c00 CW |
1750 | rcu_read_lock(); |
1751 | list_for_each_entry_rcu(km, &xfrm_km_list, list) | |
26b15dad JHS |
1752 | if (km->notify) |
1753 | km->notify(x, c); | |
85168c00 | 1754 | rcu_read_unlock(); |
26b15dad JHS |
1755 | } |
1756 | ||
1757 | EXPORT_SYMBOL(km_policy_notify); | |
1758 | EXPORT_SYMBOL(km_state_notify); | |
1759 | ||
15e47304 | 1760 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid) |
26b15dad JHS |
1761 | { |
1762 | struct km_event c; | |
1763 | ||
bf08867f | 1764 | c.data.hard = hard; |
15e47304 | 1765 | c.portid = portid; |
f60f6b8f | 1766 | c.event = XFRM_MSG_EXPIRE; |
26b15dad | 1767 | km_state_notify(x, &c); |
1da177e4 LT |
1768 | } |
1769 | ||
53bc6b4d | 1770 | EXPORT_SYMBOL(km_state_expired); |
26b15dad JHS |
1771 | /* |
1772 | * We send to all registered managers regardless of failure | |
1773 | * We are happy with one success | |
1774 | */ | |
980ebd25 | 1775 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol) |
1da177e4 | 1776 | { |
26b15dad | 1777 | int err = -EINVAL, acqret; |
1da177e4 LT |
1778 | struct xfrm_mgr *km; |
1779 | ||
85168c00 CW |
1780 | rcu_read_lock(); |
1781 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
65e0736b | 1782 | acqret = km->acquire(x, t, pol); |
26b15dad JHS |
1783 | if (!acqret) |
1784 | err = acqret; | |
1da177e4 | 1785 | } |
85168c00 | 1786 | rcu_read_unlock(); |
1da177e4 LT |
1787 | return err; |
1788 | } | |
980ebd25 | 1789 | EXPORT_SYMBOL(km_query); |
1da177e4 | 1790 | |
5d36b180 | 1791 | int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) |
1da177e4 LT |
1792 | { |
1793 | int err = -EINVAL; | |
1794 | struct xfrm_mgr *km; | |
1795 | ||
85168c00 CW |
1796 | rcu_read_lock(); |
1797 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
1da177e4 LT |
1798 | if (km->new_mapping) |
1799 | err = km->new_mapping(x, ipaddr, sport); | |
1800 | if (!err) | |
1801 | break; | |
1802 | } | |
85168c00 | 1803 | rcu_read_unlock(); |
1da177e4 LT |
1804 | return err; |
1805 | } | |
1806 | EXPORT_SYMBOL(km_new_mapping); | |
1807 | ||
15e47304 | 1808 | void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid) |
1da177e4 | 1809 | { |
26b15dad | 1810 | struct km_event c; |
1da177e4 | 1811 | |
bf08867f | 1812 | c.data.hard = hard; |
15e47304 | 1813 | c.portid = portid; |
f60f6b8f | 1814 | c.event = XFRM_MSG_POLEXPIRE; |
26b15dad | 1815 | km_policy_notify(pol, dir, &c); |
1da177e4 | 1816 | } |
a70fcb0b | 1817 | EXPORT_SYMBOL(km_policy_expired); |
1da177e4 | 1818 | |
2d60abc2 | 1819 | #ifdef CONFIG_XFRM_MIGRATE |
183cad12 DM |
1820 | int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1821 | const struct xfrm_migrate *m, int num_migrate, | |
1822 | const struct xfrm_kmaddress *k) | |
80c9abaa SS |
1823 | { |
1824 | int err = -EINVAL; | |
1825 | int ret; | |
1826 | struct xfrm_mgr *km; | |
1827 | ||
85168c00 CW |
1828 | rcu_read_lock(); |
1829 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
80c9abaa | 1830 | if (km->migrate) { |
13c1d189 | 1831 | ret = km->migrate(sel, dir, type, m, num_migrate, k); |
80c9abaa SS |
1832 | if (!ret) |
1833 | err = ret; | |
1834 | } | |
1835 | } | |
85168c00 | 1836 | rcu_read_unlock(); |
80c9abaa SS |
1837 | return err; |
1838 | } | |
1839 | EXPORT_SYMBOL(km_migrate); | |
2d60abc2 | 1840 | #endif |
80c9abaa | 1841 | |
db983c11 | 1842 | int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr) |
97a64b45 MN |
1843 | { |
1844 | int err = -EINVAL; | |
1845 | int ret; | |
1846 | struct xfrm_mgr *km; | |
1847 | ||
85168c00 CW |
1848 | rcu_read_lock(); |
1849 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
97a64b45 | 1850 | if (km->report) { |
db983c11 | 1851 | ret = km->report(net, proto, sel, addr); |
97a64b45 MN |
1852 | if (!ret) |
1853 | err = ret; | |
1854 | } | |
1855 | } | |
85168c00 | 1856 | rcu_read_unlock(); |
97a64b45 MN |
1857 | return err; |
1858 | } | |
1859 | EXPORT_SYMBOL(km_report); | |
1860 | ||
0f24558e HG |
1861 | bool km_is_alive(const struct km_event *c) |
1862 | { | |
1863 | struct xfrm_mgr *km; | |
1864 | bool is_alive = false; | |
1865 | ||
1866 | rcu_read_lock(); | |
1867 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
1868 | if (km->is_alive && km->is_alive(c)) { | |
1869 | is_alive = true; | |
1870 | break; | |
1871 | } | |
1872 | } | |
1873 | rcu_read_unlock(); | |
1874 | ||
1875 | return is_alive; | |
1876 | } | |
1877 | EXPORT_SYMBOL(km_is_alive); | |
1878 | ||
1da177e4 LT |
1879 | int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) |
1880 | { | |
1881 | int err; | |
1882 | u8 *data; | |
1883 | struct xfrm_mgr *km; | |
1884 | struct xfrm_policy *pol = NULL; | |
1885 | ||
1886 | if (optlen <= 0 || optlen > PAGE_SIZE) | |
1887 | return -EMSGSIZE; | |
1888 | ||
1889 | data = kmalloc(optlen, GFP_KERNEL); | |
1890 | if (!data) | |
1891 | return -ENOMEM; | |
1892 | ||
1893 | err = -EFAULT; | |
1894 | if (copy_from_user(data, optval, optlen)) | |
1895 | goto out; | |
1896 | ||
1897 | err = -EINVAL; | |
85168c00 CW |
1898 | rcu_read_lock(); |
1899 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
cb969f07 | 1900 | pol = km->compile_policy(sk, optname, data, |
1da177e4 LT |
1901 | optlen, &err); |
1902 | if (err >= 0) | |
1903 | break; | |
1904 | } | |
85168c00 | 1905 | rcu_read_unlock(); |
1da177e4 LT |
1906 | |
1907 | if (err >= 0) { | |
1908 | xfrm_sk_policy_insert(sk, err, pol); | |
1909 | xfrm_pol_put(pol); | |
1910 | err = 0; | |
1911 | } | |
1912 | ||
1913 | out: | |
1914 | kfree(data); | |
1915 | return err; | |
1916 | } | |
1917 | EXPORT_SYMBOL(xfrm_user_policy); | |
1918 | ||
85168c00 CW |
1919 | static DEFINE_SPINLOCK(xfrm_km_lock); |
1920 | ||
1da177e4 LT |
1921 | int xfrm_register_km(struct xfrm_mgr *km) |
1922 | { | |
85168c00 CW |
1923 | spin_lock_bh(&xfrm_km_lock); |
1924 | list_add_tail_rcu(&km->list, &xfrm_km_list); | |
1925 | spin_unlock_bh(&xfrm_km_lock); | |
1da177e4 LT |
1926 | return 0; |
1927 | } | |
1928 | EXPORT_SYMBOL(xfrm_register_km); | |
1929 | ||
1930 | int xfrm_unregister_km(struct xfrm_mgr *km) | |
1931 | { | |
85168c00 CW |
1932 | spin_lock_bh(&xfrm_km_lock); |
1933 | list_del_rcu(&km->list); | |
1934 | spin_unlock_bh(&xfrm_km_lock); | |
1935 | synchronize_rcu(); | |
1da177e4 LT |
1936 | return 0; |
1937 | } | |
1938 | EXPORT_SYMBOL(xfrm_unregister_km); | |
1939 | ||
1940 | int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo) | |
1941 | { | |
1942 | int err = 0; | |
1943 | if (unlikely(afinfo == NULL)) | |
1944 | return -EINVAL; | |
1945 | if (unlikely(afinfo->family >= NPROTO)) | |
1946 | return -EAFNOSUPPORT; | |
44abdc30 | 1947 | spin_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 | 1948 | if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL)) |
f31e8d4f | 1949 | err = -EEXIST; |
edcd5821 | 1950 | else |
44abdc30 CW |
1951 | rcu_assign_pointer(xfrm_state_afinfo[afinfo->family], afinfo); |
1952 | spin_unlock_bh(&xfrm_state_afinfo_lock); | |
1da177e4 LT |
1953 | return err; |
1954 | } | |
1955 | EXPORT_SYMBOL(xfrm_state_register_afinfo); | |
1956 | ||
1957 | int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo) | |
1958 | { | |
1959 | int err = 0; | |
1960 | if (unlikely(afinfo == NULL)) | |
1961 | return -EINVAL; | |
1962 | if (unlikely(afinfo->family >= NPROTO)) | |
1963 | return -EAFNOSUPPORT; | |
44abdc30 | 1964 | spin_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1965 | if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) { |
1966 | if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo)) | |
1967 | err = -EINVAL; | |
edcd5821 | 1968 | else |
44abdc30 | 1969 | RCU_INIT_POINTER(xfrm_state_afinfo[afinfo->family], NULL); |
1da177e4 | 1970 | } |
44abdc30 CW |
1971 | spin_unlock_bh(&xfrm_state_afinfo_lock); |
1972 | synchronize_rcu(); | |
1da177e4 LT |
1973 | return err; |
1974 | } | |
1975 | EXPORT_SYMBOL(xfrm_state_unregister_afinfo); | |
1976 | ||
628e341f | 1977 | struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family) |
1da177e4 LT |
1978 | { |
1979 | struct xfrm_state_afinfo *afinfo; | |
1980 | if (unlikely(family >= NPROTO)) | |
1981 | return NULL; | |
44abdc30 CW |
1982 | rcu_read_lock(); |
1983 | afinfo = rcu_dereference(xfrm_state_afinfo[family]); | |
546be240 | 1984 | if (unlikely(!afinfo)) |
44abdc30 | 1985 | rcu_read_unlock(); |
1da177e4 LT |
1986 | return afinfo; |
1987 | } | |
1988 | ||
628e341f | 1989 | void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo) |
1da177e4 | 1990 | { |
44abdc30 | 1991 | rcu_read_unlock(); |
1da177e4 LT |
1992 | } |
1993 | ||
1994 | /* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */ | |
1995 | void xfrm_state_delete_tunnel(struct xfrm_state *x) | |
1996 | { | |
1997 | if (x->tunnel) { | |
1998 | struct xfrm_state *t = x->tunnel; | |
1999 | ||
2000 | if (atomic_read(&t->tunnel_users) == 2) | |
2001 | xfrm_state_delete(t); | |
2002 | atomic_dec(&t->tunnel_users); | |
2003 | xfrm_state_put(t); | |
2004 | x->tunnel = NULL; | |
2005 | } | |
2006 | } | |
2007 | EXPORT_SYMBOL(xfrm_state_delete_tunnel); | |
2008 | ||
2009 | int xfrm_state_mtu(struct xfrm_state *x, int mtu) | |
2010 | { | |
c5c25238 | 2011 | int res; |
1da177e4 | 2012 | |
c5c25238 PM |
2013 | spin_lock_bh(&x->lock); |
2014 | if (x->km.state == XFRM_STATE_VALID && | |
2015 | x->type && x->type->get_mtu) | |
2016 | res = x->type->get_mtu(x, mtu); | |
2017 | else | |
28121617 | 2018 | res = mtu - x->props.header_len; |
c5c25238 | 2019 | spin_unlock_bh(&x->lock); |
1da177e4 LT |
2020 | return res; |
2021 | } | |
2022 | ||
a454f0cc | 2023 | int __xfrm_init_state(struct xfrm_state *x, bool init_replay) |
72cb6962 | 2024 | { |
d094cd83 | 2025 | struct xfrm_state_afinfo *afinfo; |
df9dcb45 | 2026 | struct xfrm_mode *inner_mode; |
d094cd83 | 2027 | int family = x->props.family; |
72cb6962 HX |
2028 | int err; |
2029 | ||
d094cd83 HX |
2030 | err = -EAFNOSUPPORT; |
2031 | afinfo = xfrm_state_get_afinfo(family); | |
2032 | if (!afinfo) | |
2033 | goto error; | |
2034 | ||
2035 | err = 0; | |
2036 | if (afinfo->init_flags) | |
2037 | err = afinfo->init_flags(x); | |
2038 | ||
2039 | xfrm_state_put_afinfo(afinfo); | |
2040 | ||
2041 | if (err) | |
2042 | goto error; | |
2043 | ||
2044 | err = -EPROTONOSUPPORT; | |
13996378 | 2045 | |
df9dcb45 KM |
2046 | if (x->sel.family != AF_UNSPEC) { |
2047 | inner_mode = xfrm_get_mode(x->props.mode, x->sel.family); | |
2048 | if (inner_mode == NULL) | |
2049 | goto error; | |
2050 | ||
2051 | if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) && | |
2052 | family != x->sel.family) { | |
2053 | xfrm_put_mode(inner_mode); | |
2054 | goto error; | |
2055 | } | |
2056 | ||
2057 | x->inner_mode = inner_mode; | |
2058 | } else { | |
2059 | struct xfrm_mode *inner_mode_iaf; | |
d81d2285 | 2060 | int iafamily = AF_INET; |
df9dcb45 | 2061 | |
d81d2285 | 2062 | inner_mode = xfrm_get_mode(x->props.mode, x->props.family); |
df9dcb45 KM |
2063 | if (inner_mode == NULL) |
2064 | goto error; | |
2065 | ||
2066 | if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) { | |
2067 | xfrm_put_mode(inner_mode); | |
2068 | goto error; | |
2069 | } | |
d81d2285 | 2070 | x->inner_mode = inner_mode; |
df9dcb45 | 2071 | |
d81d2285 MW |
2072 | if (x->props.family == AF_INET) |
2073 | iafamily = AF_INET6; | |
df9dcb45 | 2074 | |
d81d2285 MW |
2075 | inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily); |
2076 | if (inner_mode_iaf) { | |
2077 | if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL) | |
2078 | x->inner_mode_iaf = inner_mode_iaf; | |
2079 | else | |
2080 | xfrm_put_mode(inner_mode_iaf); | |
df9dcb45 KM |
2081 | } |
2082 | } | |
13996378 | 2083 | |
d094cd83 | 2084 | x->type = xfrm_get_type(x->id.proto, family); |
72cb6962 HX |
2085 | if (x->type == NULL) |
2086 | goto error; | |
2087 | ||
2088 | err = x->type->init_state(x); | |
2089 | if (err) | |
2090 | goto error; | |
2091 | ||
13996378 | 2092 | x->outer_mode = xfrm_get_mode(x->props.mode, family); |
599901c3 JL |
2093 | if (x->outer_mode == NULL) { |
2094 | err = -EPROTONOSUPPORT; | |
b59f45d0 | 2095 | goto error; |
599901c3 | 2096 | } |
b59f45d0 | 2097 | |
a454f0cc WY |
2098 | if (init_replay) { |
2099 | err = xfrm_init_replay(x); | |
2100 | if (err) | |
2101 | goto error; | |
2102 | } | |
2103 | ||
72cb6962 HX |
2104 | x->km.state = XFRM_STATE_VALID; |
2105 | ||
2106 | error: | |
2107 | return err; | |
2108 | } | |
2109 | ||
a454f0cc WY |
2110 | EXPORT_SYMBOL(__xfrm_init_state); |
2111 | ||
2112 | int xfrm_init_state(struct xfrm_state *x) | |
2113 | { | |
2114 | return __xfrm_init_state(x, true); | |
2115 | } | |
2116 | ||
72cb6962 | 2117 | EXPORT_SYMBOL(xfrm_init_state); |
a716c119 | 2118 | |
d62ddc21 | 2119 | int __net_init xfrm_state_init(struct net *net) |
1da177e4 | 2120 | { |
f034b5d4 DM |
2121 | unsigned int sz; |
2122 | ||
9d4139c7 AD |
2123 | INIT_LIST_HEAD(&net->xfrm.state_all); |
2124 | ||
f034b5d4 DM |
2125 | sz = sizeof(struct hlist_head) * 8; |
2126 | ||
73d189dc AD |
2127 | net->xfrm.state_bydst = xfrm_hash_alloc(sz); |
2128 | if (!net->xfrm.state_bydst) | |
2129 | goto out_bydst; | |
d320bbb3 AD |
2130 | net->xfrm.state_bysrc = xfrm_hash_alloc(sz); |
2131 | if (!net->xfrm.state_bysrc) | |
2132 | goto out_bysrc; | |
b754a4fd AD |
2133 | net->xfrm.state_byspi = xfrm_hash_alloc(sz); |
2134 | if (!net->xfrm.state_byspi) | |
2135 | goto out_byspi; | |
529983ec | 2136 | net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1); |
1da177e4 | 2137 | |
0bf7c5b0 | 2138 | net->xfrm.state_num = 0; |
63082733 | 2139 | INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize); |
283bc9f3 | 2140 | spin_lock_init(&net->xfrm.xfrm_state_lock); |
d62ddc21 | 2141 | return 0; |
73d189dc | 2142 | |
b754a4fd AD |
2143 | out_byspi: |
2144 | xfrm_hash_free(net->xfrm.state_bysrc, sz); | |
d320bbb3 AD |
2145 | out_bysrc: |
2146 | xfrm_hash_free(net->xfrm.state_bydst, sz); | |
73d189dc AD |
2147 | out_bydst: |
2148 | return -ENOMEM; | |
d62ddc21 AD |
2149 | } |
2150 | ||
2151 | void xfrm_state_fini(struct net *net) | |
2152 | { | |
73d189dc AD |
2153 | unsigned int sz; |
2154 | ||
7c2776ee | 2155 | flush_work(&net->xfrm.state_hash_work); |
2e71029e | 2156 | xfrm_state_flush(net, IPSEC_PROTO_ANY, false); |
35db57bb | 2157 | flush_work(&xfrm_state_gc_work); |
7c2776ee | 2158 | |
9d4139c7 | 2159 | WARN_ON(!list_empty(&net->xfrm.state_all)); |
73d189dc | 2160 | |
529983ec | 2161 | sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head); |
b754a4fd AD |
2162 | WARN_ON(!hlist_empty(net->xfrm.state_byspi)); |
2163 | xfrm_hash_free(net->xfrm.state_byspi, sz); | |
d320bbb3 AD |
2164 | WARN_ON(!hlist_empty(net->xfrm.state_bysrc)); |
2165 | xfrm_hash_free(net->xfrm.state_bysrc, sz); | |
73d189dc AD |
2166 | WARN_ON(!hlist_empty(net->xfrm.state_bydst)); |
2167 | xfrm_hash_free(net->xfrm.state_bydst, sz); | |
1da177e4 LT |
2168 | } |
2169 | ||
ab5f5e8b | 2170 | #ifdef CONFIG_AUDITSYSCALL |
cf35f43e IJ |
2171 | static void xfrm_audit_helper_sainfo(struct xfrm_state *x, |
2172 | struct audit_buffer *audit_buf) | |
ab5f5e8b | 2173 | { |
68277acc PM |
2174 | struct xfrm_sec_ctx *ctx = x->security; |
2175 | u32 spi = ntohl(x->id.spi); | |
2176 | ||
2177 | if (ctx) | |
ab5f5e8b | 2178 | audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s", |
68277acc | 2179 | ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str); |
ab5f5e8b | 2180 | |
9b7a787d | 2181 | switch (x->props.family) { |
ab5f5e8b | 2182 | case AF_INET: |
21454aaa HH |
2183 | audit_log_format(audit_buf, " src=%pI4 dst=%pI4", |
2184 | &x->props.saddr.a4, &x->id.daddr.a4); | |
ab5f5e8b JL |
2185 | break; |
2186 | case AF_INET6: | |
5b095d98 | 2187 | audit_log_format(audit_buf, " src=%pI6 dst=%pI6", |
fdb46ee7 | 2188 | x->props.saddr.a6, x->id.daddr.a6); |
ab5f5e8b JL |
2189 | break; |
2190 | } | |
68277acc PM |
2191 | |
2192 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
ab5f5e8b JL |
2193 | } |
2194 | ||
cf35f43e IJ |
2195 | static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family, |
2196 | struct audit_buffer *audit_buf) | |
afeb14b4 | 2197 | { |
b71d1d42 ED |
2198 | const struct iphdr *iph4; |
2199 | const struct ipv6hdr *iph6; | |
afeb14b4 PM |
2200 | |
2201 | switch (family) { | |
2202 | case AF_INET: | |
2203 | iph4 = ip_hdr(skb); | |
21454aaa HH |
2204 | audit_log_format(audit_buf, " src=%pI4 dst=%pI4", |
2205 | &iph4->saddr, &iph4->daddr); | |
afeb14b4 PM |
2206 | break; |
2207 | case AF_INET6: | |
2208 | iph6 = ipv6_hdr(skb); | |
2209 | audit_log_format(audit_buf, | |
5b095d98 | 2210 | " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x", |
9b7a787d | 2211 | &iph6->saddr, &iph6->daddr, |
afeb14b4 PM |
2212 | iph6->flow_lbl[0] & 0x0f, |
2213 | iph6->flow_lbl[1], | |
2214 | iph6->flow_lbl[2]); | |
2215 | break; | |
2216 | } | |
2217 | } | |
2218 | ||
2e71029e | 2219 | void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid) |
ab5f5e8b JL |
2220 | { |
2221 | struct audit_buffer *audit_buf; | |
ab5f5e8b | 2222 | |
afeb14b4 | 2223 | audit_buf = xfrm_audit_start("SAD-add"); |
ab5f5e8b JL |
2224 | if (audit_buf == NULL) |
2225 | return; | |
2e71029e | 2226 | xfrm_audit_helper_usrinfo(task_valid, audit_buf); |
afeb14b4 PM |
2227 | xfrm_audit_helper_sainfo(x, audit_buf); |
2228 | audit_log_format(audit_buf, " res=%u", result); | |
ab5f5e8b JL |
2229 | audit_log_end(audit_buf); |
2230 | } | |
2231 | EXPORT_SYMBOL_GPL(xfrm_audit_state_add); | |
2232 | ||
2e71029e | 2233 | void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid) |
ab5f5e8b JL |
2234 | { |
2235 | struct audit_buffer *audit_buf; | |
ab5f5e8b | 2236 | |
afeb14b4 | 2237 | audit_buf = xfrm_audit_start("SAD-delete"); |
ab5f5e8b JL |
2238 | if (audit_buf == NULL) |
2239 | return; | |
2e71029e | 2240 | xfrm_audit_helper_usrinfo(task_valid, audit_buf); |
afeb14b4 PM |
2241 | xfrm_audit_helper_sainfo(x, audit_buf); |
2242 | audit_log_format(audit_buf, " res=%u", result); | |
ab5f5e8b JL |
2243 | audit_log_end(audit_buf); |
2244 | } | |
2245 | EXPORT_SYMBOL_GPL(xfrm_audit_state_delete); | |
afeb14b4 PM |
2246 | |
2247 | void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
2248 | struct sk_buff *skb) | |
2249 | { | |
2250 | struct audit_buffer *audit_buf; | |
2251 | u32 spi; | |
2252 | ||
2253 | audit_buf = xfrm_audit_start("SA-replay-overflow"); | |
2254 | if (audit_buf == NULL) | |
2255 | return; | |
2256 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2257 | /* don't record the sequence number because it's inherent in this kind | |
2258 | * of audit message */ | |
2259 | spi = ntohl(x->id.spi); | |
2260 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
2261 | audit_log_end(audit_buf); | |
2262 | } | |
2263 | EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow); | |
2264 | ||
9fdc4883 | 2265 | void xfrm_audit_state_replay(struct xfrm_state *x, |
afeb14b4 PM |
2266 | struct sk_buff *skb, __be32 net_seq) |
2267 | { | |
2268 | struct audit_buffer *audit_buf; | |
2269 | u32 spi; | |
2270 | ||
2271 | audit_buf = xfrm_audit_start("SA-replayed-pkt"); | |
2272 | if (audit_buf == NULL) | |
2273 | return; | |
2274 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2275 | spi = ntohl(x->id.spi); | |
2276 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2277 | spi, spi, ntohl(net_seq)); | |
2278 | audit_log_end(audit_buf); | |
2279 | } | |
9fdc4883 | 2280 | EXPORT_SYMBOL_GPL(xfrm_audit_state_replay); |
afeb14b4 PM |
2281 | |
2282 | void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family) | |
2283 | { | |
2284 | struct audit_buffer *audit_buf; | |
2285 | ||
2286 | audit_buf = xfrm_audit_start("SA-notfound"); | |
2287 | if (audit_buf == NULL) | |
2288 | return; | |
2289 | xfrm_audit_helper_pktinfo(skb, family, audit_buf); | |
2290 | audit_log_end(audit_buf); | |
2291 | } | |
2292 | EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple); | |
2293 | ||
2294 | void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
2295 | __be32 net_spi, __be32 net_seq) | |
2296 | { | |
2297 | struct audit_buffer *audit_buf; | |
2298 | u32 spi; | |
2299 | ||
2300 | audit_buf = xfrm_audit_start("SA-notfound"); | |
2301 | if (audit_buf == NULL) | |
2302 | return; | |
2303 | xfrm_audit_helper_pktinfo(skb, family, audit_buf); | |
2304 | spi = ntohl(net_spi); | |
2305 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2306 | spi, spi, ntohl(net_seq)); | |
2307 | audit_log_end(audit_buf); | |
2308 | } | |
2309 | EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound); | |
2310 | ||
2311 | void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
2312 | struct sk_buff *skb, u8 proto) | |
2313 | { | |
2314 | struct audit_buffer *audit_buf; | |
2315 | __be32 net_spi; | |
2316 | __be32 net_seq; | |
2317 | ||
2318 | audit_buf = xfrm_audit_start("SA-icv-failure"); | |
2319 | if (audit_buf == NULL) | |
2320 | return; | |
2321 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2322 | if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) { | |
2323 | u32 spi = ntohl(net_spi); | |
2324 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2325 | spi, spi, ntohl(net_seq)); | |
2326 | } | |
2327 | audit_log_end(audit_buf); | |
2328 | } | |
2329 | EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail); | |
ab5f5e8b | 2330 | #endif /* CONFIG_AUDITSYSCALL */ |