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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 | ||
c8406998 FW |
31 | #define xfrm_state_deref_prot(table, net) \ |
32 | rcu_dereference_protected((table), lockdep_is_held(&(net)->xfrm.xfrm_state_lock)) | |
33 | ||
1da177e4 LT |
34 | /* Each xfrm_state may be linked to two tables: |
35 | ||
36 | 1. Hash table by (spi,daddr,ah/esp) to find SA by SPI. (input,ctl) | |
a624c108 | 37 | 2. Hash table by (daddr,family,reqid) to find what SAs exist for given |
1da177e4 LT |
38 | destination/tunnel endpoint. (output) |
39 | */ | |
40 | ||
f034b5d4 | 41 | static unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024; |
b65e3d7b | 42 | static __read_mostly seqcount_t xfrm_state_hash_generation = SEQCNT_ZERO(xfrm_state_hash_generation); |
f034b5d4 | 43 | |
02efdff7 FW |
44 | static inline bool xfrm_state_hold_rcu(struct xfrm_state __rcu *x) |
45 | { | |
46 | return atomic_inc_not_zero(&x->refcnt); | |
47 | } | |
48 | ||
64d0cd00 | 49 | static inline unsigned int xfrm_dst_hash(struct net *net, |
2ab38503 DM |
50 | const xfrm_address_t *daddr, |
51 | const xfrm_address_t *saddr, | |
c1969f29 | 52 | u32 reqid, |
a624c108 | 53 | unsigned short family) |
f034b5d4 | 54 | { |
64d0cd00 | 55 | return __xfrm_dst_hash(daddr, saddr, reqid, family, net->xfrm.state_hmask); |
f034b5d4 DM |
56 | } |
57 | ||
64d0cd00 | 58 | static inline unsigned int xfrm_src_hash(struct net *net, |
2ab38503 DM |
59 | const xfrm_address_t *daddr, |
60 | const xfrm_address_t *saddr, | |
44e36b42 | 61 | unsigned short family) |
f034b5d4 | 62 | { |
64d0cd00 | 63 | return __xfrm_src_hash(daddr, saddr, family, net->xfrm.state_hmask); |
f034b5d4 DM |
64 | } |
65 | ||
f034b5d4 | 66 | static inline unsigned int |
2ab38503 DM |
67 | xfrm_spi_hash(struct net *net, const xfrm_address_t *daddr, |
68 | __be32 spi, u8 proto, unsigned short family) | |
f034b5d4 | 69 | { |
64d0cd00 | 70 | return __xfrm_spi_hash(daddr, spi, proto, family, net->xfrm.state_hmask); |
f034b5d4 DM |
71 | } |
72 | ||
f034b5d4 DM |
73 | static void xfrm_hash_transfer(struct hlist_head *list, |
74 | struct hlist_head *ndsttable, | |
75 | struct hlist_head *nsrctable, | |
76 | struct hlist_head *nspitable, | |
77 | unsigned int nhashmask) | |
78 | { | |
b67bfe0d | 79 | struct hlist_node *tmp; |
f034b5d4 DM |
80 | struct xfrm_state *x; |
81 | ||
b67bfe0d | 82 | hlist_for_each_entry_safe(x, tmp, list, bydst) { |
f034b5d4 DM |
83 | unsigned int h; |
84 | ||
c1969f29 DM |
85 | h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr, |
86 | x->props.reqid, x->props.family, | |
87 | nhashmask); | |
ae3fb6d3 | 88 | hlist_add_head_rcu(&x->bydst, ndsttable + h); |
f034b5d4 | 89 | |
667bbcb6 MN |
90 | h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr, |
91 | x->props.family, | |
f034b5d4 | 92 | nhashmask); |
ae3fb6d3 | 93 | hlist_add_head_rcu(&x->bysrc, nsrctable + h); |
f034b5d4 | 94 | |
7b4dc360 MN |
95 | if (x->id.spi) { |
96 | h = __xfrm_spi_hash(&x->id.daddr, x->id.spi, | |
97 | x->id.proto, x->props.family, | |
98 | nhashmask); | |
ae3fb6d3 | 99 | hlist_add_head_rcu(&x->byspi, nspitable + h); |
7b4dc360 | 100 | } |
f034b5d4 DM |
101 | } |
102 | } | |
103 | ||
63082733 | 104 | static unsigned long xfrm_hash_new_size(unsigned int state_hmask) |
f034b5d4 | 105 | { |
63082733 | 106 | return ((state_hmask + 1) << 1) * sizeof(struct hlist_head); |
f034b5d4 DM |
107 | } |
108 | ||
63082733 | 109 | static void xfrm_hash_resize(struct work_struct *work) |
f034b5d4 | 110 | { |
63082733 | 111 | struct net *net = container_of(work, struct net, xfrm.state_hash_work); |
f034b5d4 DM |
112 | struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi; |
113 | unsigned long nsize, osize; | |
114 | unsigned int nhashmask, ohashmask; | |
115 | int i; | |
116 | ||
63082733 | 117 | nsize = xfrm_hash_new_size(net->xfrm.state_hmask); |
44e36b42 | 118 | ndst = xfrm_hash_alloc(nsize); |
f034b5d4 | 119 | if (!ndst) |
0244790c | 120 | return; |
44e36b42 | 121 | nsrc = xfrm_hash_alloc(nsize); |
f034b5d4 | 122 | if (!nsrc) { |
44e36b42 | 123 | xfrm_hash_free(ndst, nsize); |
0244790c | 124 | return; |
f034b5d4 | 125 | } |
44e36b42 | 126 | nspi = xfrm_hash_alloc(nsize); |
f034b5d4 | 127 | if (!nspi) { |
44e36b42 DM |
128 | xfrm_hash_free(ndst, nsize); |
129 | xfrm_hash_free(nsrc, nsize); | |
0244790c | 130 | return; |
f034b5d4 DM |
131 | } |
132 | ||
283bc9f3 | 133 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
b65e3d7b | 134 | write_seqcount_begin(&xfrm_state_hash_generation); |
f034b5d4 DM |
135 | |
136 | nhashmask = (nsize / sizeof(struct hlist_head)) - 1U; | |
c8406998 | 137 | odst = xfrm_state_deref_prot(net->xfrm.state_bydst, net); |
63082733 | 138 | for (i = net->xfrm.state_hmask; i >= 0; i--) |
c8406998 | 139 | xfrm_hash_transfer(odst + i, ndst, nsrc, nspi, nhashmask); |
f034b5d4 | 140 | |
c8406998 FW |
141 | osrc = xfrm_state_deref_prot(net->xfrm.state_bysrc, net); |
142 | ospi = xfrm_state_deref_prot(net->xfrm.state_byspi, net); | |
63082733 | 143 | ohashmask = net->xfrm.state_hmask; |
f034b5d4 | 144 | |
c8406998 FW |
145 | rcu_assign_pointer(net->xfrm.state_bydst, ndst); |
146 | rcu_assign_pointer(net->xfrm.state_bysrc, nsrc); | |
147 | rcu_assign_pointer(net->xfrm.state_byspi, nspi); | |
63082733 | 148 | net->xfrm.state_hmask = nhashmask; |
f034b5d4 | 149 | |
b65e3d7b | 150 | write_seqcount_end(&xfrm_state_hash_generation); |
283bc9f3 | 151 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
f034b5d4 DM |
152 | |
153 | osize = (ohashmask + 1) * sizeof(struct hlist_head); | |
df7274eb FW |
154 | |
155 | synchronize_rcu(); | |
156 | ||
44e36b42 DM |
157 | xfrm_hash_free(odst, osize); |
158 | xfrm_hash_free(osrc, osize); | |
159 | xfrm_hash_free(ospi, osize); | |
f034b5d4 DM |
160 | } |
161 | ||
44abdc30 CW |
162 | static DEFINE_SPINLOCK(xfrm_state_afinfo_lock); |
163 | static struct xfrm_state_afinfo __rcu *xfrm_state_afinfo[NPROTO]; | |
1da177e4 | 164 | |
1da177e4 LT |
165 | static DEFINE_SPINLOCK(xfrm_state_gc_lock); |
166 | ||
53bc6b4d | 167 | int __xfrm_state_delete(struct xfrm_state *x); |
1da177e4 | 168 | |
980ebd25 | 169 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); |
0f24558e | 170 | bool km_is_alive(const struct km_event *c); |
15e47304 | 171 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid); |
1da177e4 | 172 | |
7a9885b9 | 173 | static DEFINE_SPINLOCK(xfrm_type_lock); |
533cb5b0 | 174 | int xfrm_register_type(const struct xfrm_type *type, unsigned short family) |
aa5d62cc | 175 | { |
7a9885b9 | 176 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); |
533cb5b0 | 177 | const struct xfrm_type **typemap; |
aa5d62cc HX |
178 | int err = 0; |
179 | ||
180 | if (unlikely(afinfo == NULL)) | |
181 | return -EAFNOSUPPORT; | |
182 | typemap = afinfo->type_map; | |
7a9885b9 | 183 | spin_lock_bh(&xfrm_type_lock); |
aa5d62cc HX |
184 | |
185 | if (likely(typemap[type->proto] == NULL)) | |
186 | typemap[type->proto] = type; | |
187 | else | |
188 | err = -EEXIST; | |
7a9885b9 CW |
189 | spin_unlock_bh(&xfrm_type_lock); |
190 | xfrm_state_put_afinfo(afinfo); | |
aa5d62cc HX |
191 | return err; |
192 | } | |
193 | EXPORT_SYMBOL(xfrm_register_type); | |
194 | ||
533cb5b0 | 195 | int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family) |
aa5d62cc | 196 | { |
7a9885b9 | 197 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); |
533cb5b0 | 198 | const struct xfrm_type **typemap; |
aa5d62cc HX |
199 | int err = 0; |
200 | ||
201 | if (unlikely(afinfo == NULL)) | |
202 | return -EAFNOSUPPORT; | |
203 | typemap = afinfo->type_map; | |
7a9885b9 | 204 | spin_lock_bh(&xfrm_type_lock); |
aa5d62cc HX |
205 | |
206 | if (unlikely(typemap[type->proto] != type)) | |
207 | err = -ENOENT; | |
208 | else | |
209 | typemap[type->proto] = NULL; | |
7a9885b9 CW |
210 | spin_unlock_bh(&xfrm_type_lock); |
211 | xfrm_state_put_afinfo(afinfo); | |
aa5d62cc HX |
212 | return err; |
213 | } | |
214 | EXPORT_SYMBOL(xfrm_unregister_type); | |
215 | ||
533cb5b0 | 216 | static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family) |
aa5d62cc HX |
217 | { |
218 | struct xfrm_state_afinfo *afinfo; | |
533cb5b0 ED |
219 | const struct xfrm_type **typemap; |
220 | const struct xfrm_type *type; | |
aa5d62cc HX |
221 | int modload_attempted = 0; |
222 | ||
223 | retry: | |
224 | afinfo = xfrm_state_get_afinfo(family); | |
225 | if (unlikely(afinfo == NULL)) | |
226 | return NULL; | |
227 | typemap = afinfo->type_map; | |
228 | ||
229 | type = typemap[proto]; | |
230 | if (unlikely(type && !try_module_get(type->owner))) | |
231 | type = NULL; | |
232 | if (!type && !modload_attempted) { | |
233 | xfrm_state_put_afinfo(afinfo); | |
234 | request_module("xfrm-type-%d-%d", family, proto); | |
235 | modload_attempted = 1; | |
236 | goto retry; | |
237 | } | |
238 | ||
239 | xfrm_state_put_afinfo(afinfo); | |
240 | return type; | |
241 | } | |
242 | ||
533cb5b0 | 243 | static void xfrm_put_type(const struct xfrm_type *type) |
aa5d62cc HX |
244 | { |
245 | module_put(type->owner); | |
246 | } | |
247 | ||
7a9885b9 | 248 | static DEFINE_SPINLOCK(xfrm_mode_lock); |
aa5d62cc HX |
249 | int xfrm_register_mode(struct xfrm_mode *mode, int family) |
250 | { | |
251 | struct xfrm_state_afinfo *afinfo; | |
252 | struct xfrm_mode **modemap; | |
253 | int err; | |
254 | ||
255 | if (unlikely(mode->encap >= XFRM_MODE_MAX)) | |
256 | return -EINVAL; | |
257 | ||
7a9885b9 | 258 | afinfo = xfrm_state_get_afinfo(family); |
aa5d62cc HX |
259 | if (unlikely(afinfo == NULL)) |
260 | return -EAFNOSUPPORT; | |
261 | ||
262 | err = -EEXIST; | |
263 | modemap = afinfo->mode_map; | |
7a9885b9 | 264 | spin_lock_bh(&xfrm_mode_lock); |
17c2a42a HX |
265 | if (modemap[mode->encap]) |
266 | goto out; | |
aa5d62cc | 267 | |
17c2a42a HX |
268 | err = -ENOENT; |
269 | if (!try_module_get(afinfo->owner)) | |
270 | goto out; | |
271 | ||
272 | mode->afinfo = afinfo; | |
273 | modemap[mode->encap] = mode; | |
274 | err = 0; | |
275 | ||
276 | out: | |
7a9885b9 CW |
277 | spin_unlock_bh(&xfrm_mode_lock); |
278 | xfrm_state_put_afinfo(afinfo); | |
aa5d62cc HX |
279 | return err; |
280 | } | |
281 | EXPORT_SYMBOL(xfrm_register_mode); | |
282 | ||
283 | int xfrm_unregister_mode(struct xfrm_mode *mode, int family) | |
284 | { | |
285 | struct xfrm_state_afinfo *afinfo; | |
286 | struct xfrm_mode **modemap; | |
287 | int err; | |
288 | ||
289 | if (unlikely(mode->encap >= XFRM_MODE_MAX)) | |
290 | return -EINVAL; | |
291 | ||
7a9885b9 | 292 | afinfo = xfrm_state_get_afinfo(family); |
aa5d62cc HX |
293 | if (unlikely(afinfo == NULL)) |
294 | return -EAFNOSUPPORT; | |
295 | ||
296 | err = -ENOENT; | |
297 | modemap = afinfo->mode_map; | |
7a9885b9 | 298 | spin_lock_bh(&xfrm_mode_lock); |
aa5d62cc HX |
299 | if (likely(modemap[mode->encap] == mode)) { |
300 | modemap[mode->encap] = NULL; | |
17c2a42a | 301 | module_put(mode->afinfo->owner); |
aa5d62cc HX |
302 | err = 0; |
303 | } | |
304 | ||
7a9885b9 CW |
305 | spin_unlock_bh(&xfrm_mode_lock); |
306 | xfrm_state_put_afinfo(afinfo); | |
aa5d62cc HX |
307 | return err; |
308 | } | |
309 | EXPORT_SYMBOL(xfrm_unregister_mode); | |
310 | ||
311 | static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family) | |
312 | { | |
313 | struct xfrm_state_afinfo *afinfo; | |
314 | struct xfrm_mode *mode; | |
315 | int modload_attempted = 0; | |
316 | ||
317 | if (unlikely(encap >= XFRM_MODE_MAX)) | |
318 | return NULL; | |
319 | ||
320 | retry: | |
321 | afinfo = xfrm_state_get_afinfo(family); | |
322 | if (unlikely(afinfo == NULL)) | |
323 | return NULL; | |
324 | ||
325 | mode = afinfo->mode_map[encap]; | |
326 | if (unlikely(mode && !try_module_get(mode->owner))) | |
327 | mode = NULL; | |
328 | if (!mode && !modload_attempted) { | |
329 | xfrm_state_put_afinfo(afinfo); | |
330 | request_module("xfrm-mode-%d-%d", family, encap); | |
331 | modload_attempted = 1; | |
332 | goto retry; | |
333 | } | |
334 | ||
335 | xfrm_state_put_afinfo(afinfo); | |
336 | return mode; | |
337 | } | |
338 | ||
339 | static void xfrm_put_mode(struct xfrm_mode *mode) | |
340 | { | |
341 | module_put(mode->owner); | |
342 | } | |
343 | ||
1da177e4 LT |
344 | static void xfrm_state_gc_destroy(struct xfrm_state *x) |
345 | { | |
9e0d57fd | 346 | tasklet_hrtimer_cancel(&x->mtimer); |
a47f0ce0 | 347 | del_timer_sync(&x->rtimer); |
a51482bd JJ |
348 | kfree(x->aalg); |
349 | kfree(x->ealg); | |
350 | kfree(x->calg); | |
351 | kfree(x->encap); | |
060f02a3 | 352 | kfree(x->coaddr); |
d8647b79 SK |
353 | kfree(x->replay_esn); |
354 | kfree(x->preplay_esn); | |
13996378 HX |
355 | if (x->inner_mode) |
356 | xfrm_put_mode(x->inner_mode); | |
df9dcb45 KM |
357 | if (x->inner_mode_iaf) |
358 | xfrm_put_mode(x->inner_mode_iaf); | |
13996378 HX |
359 | if (x->outer_mode) |
360 | xfrm_put_mode(x->outer_mode); | |
1da177e4 LT |
361 | if (x->type) { |
362 | x->type->destructor(x); | |
363 | xfrm_put_type(x->type); | |
364 | } | |
df71837d | 365 | security_xfrm_state_free(x); |
1da177e4 LT |
366 | kfree(x); |
367 | } | |
368 | ||
c7837144 | 369 | static void xfrm_state_gc_task(struct work_struct *work) |
1da177e4 | 370 | { |
c7837144 | 371 | struct net *net = container_of(work, struct net, xfrm.state_gc_work); |
12a169e7 | 372 | struct xfrm_state *x; |
b67bfe0d | 373 | struct hlist_node *tmp; |
12a169e7 | 374 | struct hlist_head gc_list; |
1da177e4 | 375 | |
1da177e4 | 376 | spin_lock_bh(&xfrm_state_gc_lock); |
c7837144 | 377 | hlist_move_list(&net->xfrm.state_gc_list, &gc_list); |
1da177e4 LT |
378 | spin_unlock_bh(&xfrm_state_gc_lock); |
379 | ||
df7274eb FW |
380 | synchronize_rcu(); |
381 | ||
b67bfe0d | 382 | hlist_for_each_entry_safe(x, tmp, &gc_list, gclist) |
1da177e4 | 383 | xfrm_state_gc_destroy(x); |
1da177e4 LT |
384 | } |
385 | ||
386 | static inline unsigned long make_jiffies(long secs) | |
387 | { | |
388 | if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ) | |
389 | return MAX_SCHEDULE_TIMEOUT-1; | |
390 | else | |
a716c119 | 391 | return secs*HZ; |
1da177e4 LT |
392 | } |
393 | ||
3e94c2dc | 394 | static enum hrtimer_restart xfrm_timer_handler(struct hrtimer *me) |
1da177e4 | 395 | { |
9e0d57fd YP |
396 | struct tasklet_hrtimer *thr = container_of(me, struct tasklet_hrtimer, timer); |
397 | struct xfrm_state *x = container_of(thr, struct xfrm_state, mtimer); | |
9d729f72 | 398 | unsigned long now = get_seconds(); |
1da177e4 LT |
399 | long next = LONG_MAX; |
400 | int warn = 0; | |
161a09e7 | 401 | int err = 0; |
1da177e4 LT |
402 | |
403 | spin_lock(&x->lock); | |
404 | if (x->km.state == XFRM_STATE_DEAD) | |
405 | goto out; | |
406 | if (x->km.state == XFRM_STATE_EXPIRED) | |
407 | goto expired; | |
408 | if (x->lft.hard_add_expires_seconds) { | |
409 | long tmo = x->lft.hard_add_expires_seconds + | |
410 | x->curlft.add_time - now; | |
e3c0d047 FD |
411 | if (tmo <= 0) { |
412 | if (x->xflags & XFRM_SOFT_EXPIRE) { | |
413 | /* enter hard expire without soft expire first?! | |
414 | * setting a new date could trigger this. | |
415 | * workarbound: fix x->curflt.add_time by below: | |
416 | */ | |
417 | x->curlft.add_time = now - x->saved_tmo - 1; | |
418 | tmo = x->lft.hard_add_expires_seconds - x->saved_tmo; | |
419 | } else | |
420 | goto expired; | |
421 | } | |
1da177e4 LT |
422 | if (tmo < next) |
423 | next = tmo; | |
424 | } | |
425 | if (x->lft.hard_use_expires_seconds) { | |
426 | long tmo = x->lft.hard_use_expires_seconds + | |
427 | (x->curlft.use_time ? : now) - now; | |
428 | if (tmo <= 0) | |
429 | goto expired; | |
430 | if (tmo < next) | |
431 | next = tmo; | |
432 | } | |
433 | if (x->km.dying) | |
434 | goto resched; | |
435 | if (x->lft.soft_add_expires_seconds) { | |
436 | long tmo = x->lft.soft_add_expires_seconds + | |
437 | x->curlft.add_time - now; | |
e3c0d047 | 438 | if (tmo <= 0) { |
1da177e4 | 439 | warn = 1; |
e3c0d047 FD |
440 | x->xflags &= ~XFRM_SOFT_EXPIRE; |
441 | } else if (tmo < next) { | |
1da177e4 | 442 | next = tmo; |
e3c0d047 FD |
443 | x->xflags |= XFRM_SOFT_EXPIRE; |
444 | x->saved_tmo = tmo; | |
445 | } | |
1da177e4 LT |
446 | } |
447 | if (x->lft.soft_use_expires_seconds) { | |
448 | long tmo = x->lft.soft_use_expires_seconds + | |
449 | (x->curlft.use_time ? : now) - now; | |
450 | if (tmo <= 0) | |
451 | warn = 1; | |
452 | else if (tmo < next) | |
453 | next = tmo; | |
454 | } | |
455 | ||
4666faab | 456 | x->km.dying = warn; |
1da177e4 | 457 | if (warn) |
53bc6b4d | 458 | km_state_expired(x, 0, 0); |
1da177e4 | 459 | resched: |
9b7a787d | 460 | if (next != LONG_MAX) { |
9e0d57fd YP |
461 | tasklet_hrtimer_start(&x->mtimer, ktime_set(next, 0), HRTIMER_MODE_REL); |
462 | } | |
a47f0ce0 | 463 | |
1da177e4 LT |
464 | goto out; |
465 | ||
466 | expired: | |
5b8ef341 | 467 | if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) |
1da177e4 | 468 | x->km.state = XFRM_STATE_EXPIRED; |
161a09e7 JL |
469 | |
470 | err = __xfrm_state_delete(x); | |
0806ae4c | 471 | if (!err) |
53bc6b4d | 472 | km_state_expired(x, 1, 0); |
1da177e4 | 473 | |
2e71029e | 474 | xfrm_audit_state_delete(x, err ? 0 : 1, true); |
161a09e7 | 475 | |
1da177e4 LT |
476 | out: |
477 | spin_unlock(&x->lock); | |
9e0d57fd | 478 | return HRTIMER_NORESTART; |
1da177e4 LT |
479 | } |
480 | ||
0ac84752 DM |
481 | static void xfrm_replay_timer_handler(unsigned long data); |
482 | ||
673c09be | 483 | struct xfrm_state *xfrm_state_alloc(struct net *net) |
1da177e4 LT |
484 | { |
485 | struct xfrm_state *x; | |
486 | ||
0da974f4 | 487 | x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC); |
1da177e4 LT |
488 | |
489 | if (x) { | |
673c09be | 490 | write_pnet(&x->xs_net, net); |
1da177e4 LT |
491 | atomic_set(&x->refcnt, 1); |
492 | atomic_set(&x->tunnel_users, 0); | |
12a169e7 | 493 | INIT_LIST_HEAD(&x->km.all); |
8f126e37 DM |
494 | INIT_HLIST_NODE(&x->bydst); |
495 | INIT_HLIST_NODE(&x->bysrc); | |
496 | INIT_HLIST_NODE(&x->byspi); | |
99565a6c FD |
497 | tasklet_hrtimer_init(&x->mtimer, xfrm_timer_handler, |
498 | CLOCK_BOOTTIME, HRTIMER_MODE_ABS); | |
b24b8a24 PE |
499 | setup_timer(&x->rtimer, xfrm_replay_timer_handler, |
500 | (unsigned long)x); | |
9d729f72 | 501 | x->curlft.add_time = get_seconds(); |
1da177e4 LT |
502 | x->lft.soft_byte_limit = XFRM_INF; |
503 | x->lft.soft_packet_limit = XFRM_INF; | |
504 | x->lft.hard_byte_limit = XFRM_INF; | |
505 | x->lft.hard_packet_limit = XFRM_INF; | |
f8cd5488 JHS |
506 | x->replay_maxage = 0; |
507 | x->replay_maxdiff = 0; | |
df9dcb45 KM |
508 | x->inner_mode = NULL; |
509 | x->inner_mode_iaf = NULL; | |
1da177e4 LT |
510 | spin_lock_init(&x->lock); |
511 | } | |
512 | return x; | |
513 | } | |
514 | EXPORT_SYMBOL(xfrm_state_alloc); | |
515 | ||
516 | void __xfrm_state_destroy(struct xfrm_state *x) | |
517 | { | |
98806f75 AD |
518 | struct net *net = xs_net(x); |
519 | ||
547b792c | 520 | WARN_ON(x->km.state != XFRM_STATE_DEAD); |
1da177e4 LT |
521 | |
522 | spin_lock_bh(&xfrm_state_gc_lock); | |
98806f75 | 523 | hlist_add_head(&x->gclist, &net->xfrm.state_gc_list); |
1da177e4 | 524 | spin_unlock_bh(&xfrm_state_gc_lock); |
98806f75 | 525 | schedule_work(&net->xfrm.state_gc_work); |
1da177e4 LT |
526 | } |
527 | EXPORT_SYMBOL(__xfrm_state_destroy); | |
528 | ||
53bc6b4d | 529 | int __xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 530 | { |
98806f75 | 531 | struct net *net = xs_net(x); |
26b15dad JHS |
532 | int err = -ESRCH; |
533 | ||
1da177e4 LT |
534 | if (x->km.state != XFRM_STATE_DEAD) { |
535 | x->km.state = XFRM_STATE_DEAD; | |
283bc9f3 | 536 | spin_lock(&net->xfrm.xfrm_state_lock); |
12a169e7 | 537 | list_del(&x->km.all); |
ae3fb6d3 FW |
538 | hlist_del_rcu(&x->bydst); |
539 | hlist_del_rcu(&x->bysrc); | |
a47f0ce0 | 540 | if (x->id.spi) |
ae3fb6d3 | 541 | hlist_del_rcu(&x->byspi); |
98806f75 | 542 | net->xfrm.state_num--; |
283bc9f3 | 543 | spin_unlock(&net->xfrm.xfrm_state_lock); |
1da177e4 | 544 | |
1da177e4 LT |
545 | /* All xfrm_state objects are created by xfrm_state_alloc. |
546 | * The xfrm_state_alloc call gives a reference, and that | |
547 | * is what we are dropping here. | |
548 | */ | |
5dba4797 | 549 | xfrm_state_put(x); |
26b15dad | 550 | err = 0; |
1da177e4 | 551 | } |
26b15dad JHS |
552 | |
553 | return err; | |
1da177e4 | 554 | } |
53bc6b4d | 555 | EXPORT_SYMBOL(__xfrm_state_delete); |
1da177e4 | 556 | |
26b15dad | 557 | int xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 558 | { |
26b15dad JHS |
559 | int err; |
560 | ||
1da177e4 | 561 | spin_lock_bh(&x->lock); |
26b15dad | 562 | err = __xfrm_state_delete(x); |
1da177e4 | 563 | spin_unlock_bh(&x->lock); |
26b15dad JHS |
564 | |
565 | return err; | |
1da177e4 LT |
566 | } |
567 | EXPORT_SYMBOL(xfrm_state_delete); | |
568 | ||
4aa2e62c JL |
569 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
570 | static inline int | |
2e71029e | 571 | xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid) |
1da177e4 | 572 | { |
4aa2e62c JL |
573 | int i, err = 0; |
574 | ||
0e602451 | 575 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
4aa2e62c JL |
576 | struct xfrm_state *x; |
577 | ||
b67bfe0d | 578 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
4aa2e62c JL |
579 | if (xfrm_id_proto_match(x->id.proto, proto) && |
580 | (err = security_xfrm_state_delete(x)) != 0) { | |
2e71029e | 581 | xfrm_audit_state_delete(x, 0, task_valid); |
4aa2e62c JL |
582 | return err; |
583 | } | |
584 | } | |
585 | } | |
586 | ||
587 | return err; | |
588 | } | |
589 | #else | |
590 | static inline int | |
2e71029e | 591 | xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid) |
4aa2e62c JL |
592 | { |
593 | return 0; | |
594 | } | |
595 | #endif | |
596 | ||
2e71029e | 597 | int xfrm_state_flush(struct net *net, u8 proto, bool task_valid) |
4aa2e62c | 598 | { |
9e64cc95 | 599 | int i, err = 0, cnt = 0; |
1da177e4 | 600 | |
283bc9f3 | 601 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
2e71029e | 602 | err = xfrm_state_flush_secctx_check(net, proto, task_valid); |
4aa2e62c JL |
603 | if (err) |
604 | goto out; | |
605 | ||
9e64cc95 | 606 | err = -ESRCH; |
0e602451 | 607 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
8f126e37 | 608 | struct xfrm_state *x; |
1da177e4 | 609 | restart: |
b67bfe0d | 610 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
1da177e4 | 611 | if (!xfrm_state_kern(x) && |
5794708f | 612 | xfrm_id_proto_match(x->id.proto, proto)) { |
1da177e4 | 613 | xfrm_state_hold(x); |
283bc9f3 | 614 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 615 | |
161a09e7 | 616 | err = xfrm_state_delete(x); |
ab5f5e8b | 617 | xfrm_audit_state_delete(x, err ? 0 : 1, |
2e71029e | 618 | task_valid); |
1da177e4 | 619 | xfrm_state_put(x); |
9e64cc95 JHS |
620 | if (!err) |
621 | cnt++; | |
1da177e4 | 622 | |
283bc9f3 | 623 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
624 | goto restart; |
625 | } | |
626 | } | |
627 | } | |
9e64cc95 JHS |
628 | if (cnt) |
629 | err = 0; | |
4aa2e62c JL |
630 | |
631 | out: | |
283bc9f3 | 632 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
4aa2e62c | 633 | return err; |
1da177e4 LT |
634 | } |
635 | EXPORT_SYMBOL(xfrm_state_flush); | |
636 | ||
e071041b | 637 | void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si) |
28d8909b | 638 | { |
283bc9f3 | 639 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
e071041b AD |
640 | si->sadcnt = net->xfrm.state_num; |
641 | si->sadhcnt = net->xfrm.state_hmask; | |
28d8909b | 642 | si->sadhmcnt = xfrm_state_hashmax; |
283bc9f3 | 643 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
28d8909b JHS |
644 | } |
645 | EXPORT_SYMBOL(xfrm_sad_getinfo); | |
646 | ||
1da177e4 | 647 | static int |
1a898592 | 648 | xfrm_init_tempstate(struct xfrm_state *x, const struct flowi *fl, |
04686013 | 649 | const struct xfrm_tmpl *tmpl, |
33765d06 | 650 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
8444cf71 | 651 | unsigned short family) |
1da177e4 LT |
652 | { |
653 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
654 | if (!afinfo) | |
655 | return -1; | |
8444cf71 TE |
656 | afinfo->init_tempsel(&x->sel, fl); |
657 | ||
658 | if (family != tmpl->encap_family) { | |
659 | xfrm_state_put_afinfo(afinfo); | |
660 | afinfo = xfrm_state_get_afinfo(tmpl->encap_family); | |
661 | if (!afinfo) | |
662 | return -1; | |
663 | } | |
664 | afinfo->init_temprop(x, tmpl, daddr, saddr); | |
1da177e4 LT |
665 | xfrm_state_put_afinfo(afinfo); |
666 | return 0; | |
667 | } | |
668 | ||
9aa60088 DM |
669 | static struct xfrm_state *__xfrm_state_lookup(struct net *net, u32 mark, |
670 | const xfrm_address_t *daddr, | |
671 | __be32 spi, u8 proto, | |
672 | unsigned short family) | |
edcd5821 | 673 | { |
221df1ed | 674 | unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family); |
edcd5821 DM |
675 | struct xfrm_state *x; |
676 | ||
ae3fb6d3 | 677 | hlist_for_each_entry_rcu(x, net->xfrm.state_byspi + h, byspi) { |
edcd5821 DM |
678 | if (x->props.family != family || |
679 | x->id.spi != spi || | |
1802571b | 680 | x->id.proto != proto || |
70e94e66 | 681 | !xfrm_addr_equal(&x->id.daddr, daddr, family)) |
edcd5821 DM |
682 | continue; |
683 | ||
3d6acfa7 JHS |
684 | if ((mark & x->mark.m) != x->mark.v) |
685 | continue; | |
02efdff7 FW |
686 | if (!xfrm_state_hold_rcu(x)) |
687 | continue; | |
edcd5821 DM |
688 | return x; |
689 | } | |
690 | ||
691 | return NULL; | |
692 | } | |
693 | ||
9aa60088 DM |
694 | static struct xfrm_state *__xfrm_state_lookup_byaddr(struct net *net, u32 mark, |
695 | const xfrm_address_t *daddr, | |
696 | const xfrm_address_t *saddr, | |
697 | u8 proto, unsigned short family) | |
edcd5821 | 698 | { |
221df1ed | 699 | unsigned int h = xfrm_src_hash(net, daddr, saddr, family); |
edcd5821 DM |
700 | struct xfrm_state *x; |
701 | ||
ae3fb6d3 | 702 | hlist_for_each_entry_rcu(x, net->xfrm.state_bysrc + h, bysrc) { |
edcd5821 | 703 | if (x->props.family != family || |
1802571b | 704 | x->id.proto != proto || |
70e94e66 YH |
705 | !xfrm_addr_equal(&x->id.daddr, daddr, family) || |
706 | !xfrm_addr_equal(&x->props.saddr, saddr, family)) | |
edcd5821 DM |
707 | continue; |
708 | ||
3d6acfa7 JHS |
709 | if ((mark & x->mark.m) != x->mark.v) |
710 | continue; | |
02efdff7 FW |
711 | if (!xfrm_state_hold_rcu(x)) |
712 | continue; | |
edcd5821 DM |
713 | return x; |
714 | } | |
715 | ||
716 | return NULL; | |
717 | } | |
718 | ||
719 | static inline struct xfrm_state * | |
720 | __xfrm_state_locate(struct xfrm_state *x, int use_spi, int family) | |
721 | { | |
221df1ed | 722 | struct net *net = xs_net(x); |
bd55775c | 723 | u32 mark = x->mark.v & x->mark.m; |
221df1ed | 724 | |
edcd5821 | 725 | if (use_spi) |
bd55775c JHS |
726 | return __xfrm_state_lookup(net, mark, &x->id.daddr, |
727 | x->id.spi, x->id.proto, family); | |
edcd5821 | 728 | else |
bd55775c JHS |
729 | return __xfrm_state_lookup_byaddr(net, mark, |
730 | &x->id.daddr, | |
edcd5821 DM |
731 | &x->props.saddr, |
732 | x->id.proto, family); | |
733 | } | |
734 | ||
98806f75 | 735 | static void xfrm_hash_grow_check(struct net *net, int have_hash_collision) |
2fab22f2 PM |
736 | { |
737 | if (have_hash_collision && | |
98806f75 AD |
738 | (net->xfrm.state_hmask + 1) < xfrm_state_hashmax && |
739 | net->xfrm.state_num > net->xfrm.state_hmask) | |
740 | schedule_work(&net->xfrm.state_hash_work); | |
2fab22f2 PM |
741 | } |
742 | ||
08ec9af1 | 743 | static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x, |
4a08ab0f | 744 | const struct flowi *fl, unsigned short family, |
08ec9af1 DM |
745 | struct xfrm_state **best, int *acq_in_progress, |
746 | int *error) | |
747 | { | |
748 | /* Resolution logic: | |
749 | * 1. There is a valid state with matching selector. Done. | |
750 | * 2. Valid state with inappropriate selector. Skip. | |
751 | * | |
752 | * Entering area of "sysdeps". | |
753 | * | |
754 | * 3. If state is not valid, selector is temporary, it selects | |
755 | * only session which triggered previous resolution. Key | |
756 | * manager will do something to install a state with proper | |
757 | * selector. | |
758 | */ | |
759 | if (x->km.state == XFRM_STATE_VALID) { | |
760 | if ((x->sel.family && | |
761 | !xfrm_selector_match(&x->sel, fl, x->sel.family)) || | |
762 | !security_xfrm_state_pol_flow_match(x, pol, fl)) | |
763 | return; | |
764 | ||
765 | if (!*best || | |
766 | (*best)->km.dying > x->km.dying || | |
767 | ((*best)->km.dying == x->km.dying && | |
768 | (*best)->curlft.add_time < x->curlft.add_time)) | |
769 | *best = x; | |
770 | } else if (x->km.state == XFRM_STATE_ACQ) { | |
771 | *acq_in_progress = 1; | |
772 | } else if (x->km.state == XFRM_STATE_ERROR || | |
773 | x->km.state == XFRM_STATE_EXPIRED) { | |
774 | if (xfrm_selector_match(&x->sel, fl, x->sel.family) && | |
775 | security_xfrm_state_pol_flow_match(x, pol, fl)) | |
776 | *error = -ESRCH; | |
777 | } | |
778 | } | |
779 | ||
1da177e4 | 780 | struct xfrm_state * |
33765d06 | 781 | xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
b520e9f6 | 782 | const struct flowi *fl, struct xfrm_tmpl *tmpl, |
1da177e4 LT |
783 | struct xfrm_policy *pol, int *err, |
784 | unsigned short family) | |
785 | { | |
08ec9af1 | 786 | static xfrm_address_t saddr_wildcard = { }; |
5447c5e4 | 787 | struct net *net = xp_net(pol); |
6a783c90 | 788 | unsigned int h, h_wildcard; |
37b08e34 | 789 | struct xfrm_state *x, *x0, *to_put; |
1da177e4 LT |
790 | int acquire_in_progress = 0; |
791 | int error = 0; | |
792 | struct xfrm_state *best = NULL; | |
bd55775c | 793 | u32 mark = pol->mark.v & pol->mark.m; |
8444cf71 | 794 | unsigned short encap_family = tmpl->encap_family; |
b65e3d7b | 795 | unsigned int sequence; |
0f24558e | 796 | struct km_event c; |
a716c119 | 797 | |
37b08e34 DM |
798 | to_put = NULL; |
799 | ||
b65e3d7b FW |
800 | sequence = read_seqcount_begin(&xfrm_state_hash_generation); |
801 | ||
283bc9f3 | 802 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
8444cf71 | 803 | h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family); |
ae3fb6d3 | 804 | hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h, bydst) { |
8444cf71 | 805 | if (x->props.family == encap_family && |
1da177e4 | 806 | x->props.reqid == tmpl->reqid && |
3d6acfa7 | 807 | (mark & x->mark.m) == x->mark.v && |
fbd9a5b4 | 808 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
8444cf71 | 809 | xfrm_state_addr_check(x, daddr, saddr, encap_family) && |
1da177e4 LT |
810 | tmpl->mode == x->props.mode && |
811 | tmpl->id.proto == x->id.proto && | |
08ec9af1 | 812 | (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) |
1f673c5f | 813 | xfrm_state_look_at(pol, x, fl, encap_family, |
08ec9af1 DM |
814 | &best, &acquire_in_progress, &error); |
815 | } | |
6f115638 | 816 | if (best || acquire_in_progress) |
08ec9af1 DM |
817 | goto found; |
818 | ||
8444cf71 | 819 | h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, encap_family); |
ae3fb6d3 | 820 | hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h_wildcard, bydst) { |
8444cf71 | 821 | if (x->props.family == encap_family && |
08ec9af1 | 822 | x->props.reqid == tmpl->reqid && |
3d6acfa7 | 823 | (mark & x->mark.m) == x->mark.v && |
08ec9af1 | 824 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
f59bbdfa | 825 | xfrm_addr_equal(&x->id.daddr, daddr, encap_family) && |
08ec9af1 DM |
826 | tmpl->mode == x->props.mode && |
827 | tmpl->id.proto == x->id.proto && | |
828 | (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) | |
1f673c5f | 829 | xfrm_state_look_at(pol, x, fl, encap_family, |
08ec9af1 | 830 | &best, &acquire_in_progress, &error); |
1da177e4 LT |
831 | } |
832 | ||
08ec9af1 | 833 | found: |
1da177e4 LT |
834 | x = best; |
835 | if (!x && !error && !acquire_in_progress) { | |
5c5d281a | 836 | if (tmpl->id.spi && |
bd55775c | 837 | (x0 = __xfrm_state_lookup(net, mark, daddr, tmpl->id.spi, |
8444cf71 | 838 | tmpl->id.proto, encap_family)) != NULL) { |
37b08e34 | 839 | to_put = x0; |
1da177e4 LT |
840 | error = -EEXIST; |
841 | goto out; | |
842 | } | |
0f24558e HG |
843 | |
844 | c.net = net; | |
845 | /* If the KMs have no listeners (yet...), avoid allocating an SA | |
846 | * for each and every packet - garbage collection might not | |
847 | * handle the flood. | |
848 | */ | |
849 | if (!km_is_alive(&c)) { | |
850 | error = -ESRCH; | |
851 | goto out; | |
852 | } | |
853 | ||
5447c5e4 | 854 | x = xfrm_state_alloc(net); |
1da177e4 LT |
855 | if (x == NULL) { |
856 | error = -ENOMEM; | |
857 | goto out; | |
858 | } | |
8444cf71 | 859 | /* Initialize temporary state matching only |
1da177e4 | 860 | * to current session. */ |
8444cf71 | 861 | xfrm_init_tempstate(x, fl, tmpl, daddr, saddr, family); |
bd55775c | 862 | memcpy(&x->mark, &pol->mark, sizeof(x->mark)); |
1da177e4 | 863 | |
1d28f42c | 864 | error = security_xfrm_state_alloc_acquire(x, pol->security, fl->flowi_secid); |
e0d1caa7 VY |
865 | if (error) { |
866 | x->km.state = XFRM_STATE_DEAD; | |
37b08e34 | 867 | to_put = x; |
e0d1caa7 VY |
868 | x = NULL; |
869 | goto out; | |
870 | } | |
871 | ||
1da177e4 LT |
872 | if (km_query(x, tmpl, pol) == 0) { |
873 | x->km.state = XFRM_STATE_ACQ; | |
5447c5e4 | 874 | list_add(&x->km.all, &net->xfrm.state_all); |
ae3fb6d3 | 875 | hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h); |
8444cf71 | 876 | h = xfrm_src_hash(net, daddr, saddr, encap_family); |
ae3fb6d3 | 877 | hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h); |
1da177e4 | 878 | if (x->id.spi) { |
8444cf71 | 879 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, encap_family); |
ae3fb6d3 | 880 | hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h); |
1da177e4 | 881 | } |
b27aeadb | 882 | x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires; |
9e0d57fd | 883 | tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL); |
5447c5e4 AD |
884 | net->xfrm.state_num++; |
885 | xfrm_hash_grow_check(net, x->bydst.next != NULL); | |
1da177e4 LT |
886 | } else { |
887 | x->km.state = XFRM_STATE_DEAD; | |
37b08e34 | 888 | to_put = x; |
1da177e4 LT |
889 | x = NULL; |
890 | error = -ESRCH; | |
891 | } | |
892 | } | |
893 | out: | |
02efdff7 FW |
894 | if (x) { |
895 | if (!xfrm_state_hold_rcu(x)) { | |
896 | *err = -EAGAIN; | |
897 | x = NULL; | |
898 | } | |
899 | } else { | |
1da177e4 | 900 | *err = acquire_in_progress ? -EAGAIN : error; |
02efdff7 | 901 | } |
283bc9f3 | 902 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
37b08e34 DM |
903 | if (to_put) |
904 | xfrm_state_put(to_put); | |
b65e3d7b FW |
905 | |
906 | if (read_seqcount_retry(&xfrm_state_hash_generation, sequence)) { | |
907 | *err = -EAGAIN; | |
908 | if (x) { | |
909 | xfrm_state_put(x); | |
910 | x = NULL; | |
911 | } | |
912 | } | |
913 | ||
1da177e4 LT |
914 | return x; |
915 | } | |
916 | ||
628529b6 | 917 | struct xfrm_state * |
bd55775c | 918 | xfrm_stateonly_find(struct net *net, u32 mark, |
5447c5e4 | 919 | xfrm_address_t *daddr, xfrm_address_t *saddr, |
628529b6 JHS |
920 | unsigned short family, u8 mode, u8 proto, u32 reqid) |
921 | { | |
4bda4f25 | 922 | unsigned int h; |
628529b6 | 923 | struct xfrm_state *rx = NULL, *x = NULL; |
628529b6 | 924 | |
4ae770bf | 925 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
5447c5e4 | 926 | h = xfrm_dst_hash(net, daddr, saddr, reqid, family); |
b67bfe0d | 927 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
628529b6 JHS |
928 | if (x->props.family == family && |
929 | x->props.reqid == reqid && | |
3d6acfa7 | 930 | (mark & x->mark.m) == x->mark.v && |
628529b6 JHS |
931 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
932 | xfrm_state_addr_check(x, daddr, saddr, family) && | |
933 | mode == x->props.mode && | |
934 | proto == x->id.proto && | |
935 | x->km.state == XFRM_STATE_VALID) { | |
936 | rx = x; | |
937 | break; | |
938 | } | |
939 | } | |
940 | ||
941 | if (rx) | |
942 | xfrm_state_hold(rx); | |
4ae770bf | 943 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
628529b6 JHS |
944 | |
945 | ||
946 | return rx; | |
947 | } | |
948 | EXPORT_SYMBOL(xfrm_stateonly_find); | |
949 | ||
c454997e FD |
950 | struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi, |
951 | unsigned short family) | |
952 | { | |
953 | struct xfrm_state *x; | |
954 | struct xfrm_state_walk *w; | |
955 | ||
956 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
957 | list_for_each_entry(w, &net->xfrm.state_all, all) { | |
958 | x = container_of(w, struct xfrm_state, km); | |
959 | if (x->props.family != family || | |
960 | x->id.spi != spi) | |
961 | continue; | |
962 | ||
c454997e | 963 | xfrm_state_hold(x); |
bdddbf69 | 964 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
c454997e FD |
965 | return x; |
966 | } | |
967 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); | |
968 | return NULL; | |
969 | } | |
970 | EXPORT_SYMBOL(xfrm_state_lookup_byspi); | |
971 | ||
1da177e4 LT |
972 | static void __xfrm_state_insert(struct xfrm_state *x) |
973 | { | |
98806f75 | 974 | struct net *net = xs_net(x); |
a624c108 | 975 | unsigned int h; |
1da177e4 | 976 | |
98806f75 | 977 | list_add(&x->km.all, &net->xfrm.state_all); |
4c563f76 | 978 | |
98806f75 | 979 | h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr, |
c1969f29 | 980 | x->props.reqid, x->props.family); |
ae3fb6d3 | 981 | hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h); |
1da177e4 | 982 | |
98806f75 | 983 | h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family); |
ae3fb6d3 | 984 | hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h); |
1da177e4 | 985 | |
7b4dc360 | 986 | if (x->id.spi) { |
98806f75 | 987 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, |
6c44e6b7 MN |
988 | x->props.family); |
989 | ||
ae3fb6d3 | 990 | hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h); |
6c44e6b7 MN |
991 | } |
992 | ||
9e0d57fd | 993 | tasklet_hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL); |
a47f0ce0 DM |
994 | if (x->replay_maxage) |
995 | mod_timer(&x->rtimer, jiffies + x->replay_maxage); | |
f8cd5488 | 996 | |
98806f75 | 997 | net->xfrm.state_num++; |
f034b5d4 | 998 | |
98806f75 | 999 | xfrm_hash_grow_check(net, x->bydst.next != NULL); |
1da177e4 LT |
1000 | } |
1001 | ||
283bc9f3 | 1002 | /* net->xfrm.xfrm_state_lock is held */ |
c7f5ea3a DM |
1003 | static void __xfrm_state_bump_genids(struct xfrm_state *xnew) |
1004 | { | |
98806f75 | 1005 | struct net *net = xs_net(xnew); |
c7f5ea3a DM |
1006 | unsigned short family = xnew->props.family; |
1007 | u32 reqid = xnew->props.reqid; | |
1008 | struct xfrm_state *x; | |
c7f5ea3a | 1009 | unsigned int h; |
3d6acfa7 | 1010 | u32 mark = xnew->mark.v & xnew->mark.m; |
c7f5ea3a | 1011 | |
98806f75 | 1012 | h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family); |
b67bfe0d | 1013 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
c7f5ea3a DM |
1014 | if (x->props.family == family && |
1015 | x->props.reqid == reqid && | |
3d6acfa7 | 1016 | (mark & x->mark.m) == x->mark.v && |
70e94e66 YH |
1017 | xfrm_addr_equal(&x->id.daddr, &xnew->id.daddr, family) && |
1018 | xfrm_addr_equal(&x->props.saddr, &xnew->props.saddr, family)) | |
34996cb9 | 1019 | x->genid++; |
c7f5ea3a DM |
1020 | } |
1021 | } | |
1022 | ||
1da177e4 LT |
1023 | void xfrm_state_insert(struct xfrm_state *x) |
1024 | { | |
283bc9f3 FD |
1025 | struct net *net = xs_net(x); |
1026 | ||
1027 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
c7f5ea3a | 1028 | __xfrm_state_bump_genids(x); |
1da177e4 | 1029 | __xfrm_state_insert(x); |
283bc9f3 | 1030 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1031 | } |
1032 | EXPORT_SYMBOL(xfrm_state_insert); | |
1033 | ||
283bc9f3 | 1034 | /* net->xfrm.xfrm_state_lock is held */ |
e473fcb4 MK |
1035 | static struct xfrm_state *__find_acq_core(struct net *net, |
1036 | const struct xfrm_mark *m, | |
a70486f0 DM |
1037 | unsigned short family, u8 mode, |
1038 | u32 reqid, u8 proto, | |
1039 | const xfrm_address_t *daddr, | |
e473fcb4 MK |
1040 | const xfrm_address_t *saddr, |
1041 | int create) | |
2770834c | 1042 | { |
5447c5e4 | 1043 | unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family); |
2770834c | 1044 | struct xfrm_state *x; |
3d6acfa7 | 1045 | u32 mark = m->v & m->m; |
2770834c | 1046 | |
b67bfe0d | 1047 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
2770834c DM |
1048 | if (x->props.reqid != reqid || |
1049 | x->props.mode != mode || | |
1050 | x->props.family != family || | |
1051 | x->km.state != XFRM_STATE_ACQ || | |
75e252d9 | 1052 | x->id.spi != 0 || |
1802571b | 1053 | x->id.proto != proto || |
3d6acfa7 | 1054 | (mark & x->mark.m) != x->mark.v || |
70e94e66 YH |
1055 | !xfrm_addr_equal(&x->id.daddr, daddr, family) || |
1056 | !xfrm_addr_equal(&x->props.saddr, saddr, family)) | |
2770834c DM |
1057 | continue; |
1058 | ||
2770834c DM |
1059 | xfrm_state_hold(x); |
1060 | return x; | |
1061 | } | |
1062 | ||
1063 | if (!create) | |
1064 | return NULL; | |
1065 | ||
5447c5e4 | 1066 | x = xfrm_state_alloc(net); |
2770834c DM |
1067 | if (likely(x)) { |
1068 | switch (family) { | |
1069 | case AF_INET: | |
1070 | x->sel.daddr.a4 = daddr->a4; | |
1071 | x->sel.saddr.a4 = saddr->a4; | |
1072 | x->sel.prefixlen_d = 32; | |
1073 | x->sel.prefixlen_s = 32; | |
1074 | x->props.saddr.a4 = saddr->a4; | |
1075 | x->id.daddr.a4 = daddr->a4; | |
1076 | break; | |
1077 | ||
1078 | case AF_INET6: | |
15e318bd JB |
1079 | x->sel.daddr.in6 = daddr->in6; |
1080 | x->sel.saddr.in6 = saddr->in6; | |
2770834c DM |
1081 | x->sel.prefixlen_d = 128; |
1082 | x->sel.prefixlen_s = 128; | |
15e318bd JB |
1083 | x->props.saddr.in6 = saddr->in6; |
1084 | x->id.daddr.in6 = daddr->in6; | |
2770834c | 1085 | break; |
3ff50b79 | 1086 | } |
2770834c DM |
1087 | |
1088 | x->km.state = XFRM_STATE_ACQ; | |
1089 | x->id.proto = proto; | |
1090 | x->props.family = family; | |
1091 | x->props.mode = mode; | |
1092 | x->props.reqid = reqid; | |
bd55775c JHS |
1093 | x->mark.v = m->v; |
1094 | x->mark.m = m->m; | |
b27aeadb | 1095 | x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires; |
2770834c | 1096 | xfrm_state_hold(x); |
9e0d57fd | 1097 | tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL); |
5447c5e4 | 1098 | list_add(&x->km.all, &net->xfrm.state_all); |
ae3fb6d3 | 1099 | hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h); |
5447c5e4 | 1100 | h = xfrm_src_hash(net, daddr, saddr, family); |
ae3fb6d3 | 1101 | hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h); |
918049f0 | 1102 | |
5447c5e4 | 1103 | net->xfrm.state_num++; |
918049f0 | 1104 | |
5447c5e4 | 1105 | xfrm_hash_grow_check(net, x->bydst.next != NULL); |
2770834c DM |
1106 | } |
1107 | ||
1108 | return x; | |
1109 | } | |
1110 | ||
bd55775c | 1111 | static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); |
1da177e4 LT |
1112 | |
1113 | int xfrm_state_add(struct xfrm_state *x) | |
1114 | { | |
5447c5e4 | 1115 | struct net *net = xs_net(x); |
37b08e34 | 1116 | struct xfrm_state *x1, *to_put; |
1da177e4 LT |
1117 | int family; |
1118 | int err; | |
bd55775c | 1119 | u32 mark = x->mark.v & x->mark.m; |
eb2971b6 | 1120 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
1da177e4 LT |
1121 | |
1122 | family = x->props.family; | |
1da177e4 | 1123 | |
37b08e34 DM |
1124 | to_put = NULL; |
1125 | ||
283bc9f3 | 1126 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 1127 | |
edcd5821 | 1128 | x1 = __xfrm_state_locate(x, use_spi, family); |
1da177e4 | 1129 | if (x1) { |
37b08e34 | 1130 | to_put = x1; |
1da177e4 LT |
1131 | x1 = NULL; |
1132 | err = -EEXIST; | |
1133 | goto out; | |
1134 | } | |
1135 | ||
eb2971b6 | 1136 | if (use_spi && x->km.seq) { |
bd55775c | 1137 | x1 = __xfrm_find_acq_byseq(net, mark, x->km.seq); |
75e252d9 | 1138 | if (x1 && ((x1->id.proto != x->id.proto) || |
70e94e66 | 1139 | !xfrm_addr_equal(&x1->id.daddr, &x->id.daddr, family))) { |
37b08e34 | 1140 | to_put = x1; |
1da177e4 LT |
1141 | x1 = NULL; |
1142 | } | |
1143 | } | |
1144 | ||
eb2971b6 | 1145 | if (use_spi && !x1) |
bd55775c JHS |
1146 | x1 = __find_acq_core(net, &x->mark, family, x->props.mode, |
1147 | x->props.reqid, x->id.proto, | |
2770834c | 1148 | &x->id.daddr, &x->props.saddr, 0); |
1da177e4 | 1149 | |
c7f5ea3a | 1150 | __xfrm_state_bump_genids(x); |
1da177e4 LT |
1151 | __xfrm_state_insert(x); |
1152 | err = 0; | |
1153 | ||
1154 | out: | |
283bc9f3 | 1155 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1156 | |
1157 | if (x1) { | |
1158 | xfrm_state_delete(x1); | |
1159 | xfrm_state_put(x1); | |
1160 | } | |
1161 | ||
37b08e34 DM |
1162 | if (to_put) |
1163 | xfrm_state_put(to_put); | |
1164 | ||
1da177e4 LT |
1165 | return err; |
1166 | } | |
1167 | EXPORT_SYMBOL(xfrm_state_add); | |
1168 | ||
80c9abaa | 1169 | #ifdef CONFIG_XFRM_MIGRATE |
cc9ab60e | 1170 | static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig) |
80c9abaa | 1171 | { |
98806f75 | 1172 | struct net *net = xs_net(orig); |
98806f75 | 1173 | struct xfrm_state *x = xfrm_state_alloc(net); |
80c9abaa | 1174 | if (!x) |
553f9118 | 1175 | goto out; |
80c9abaa SS |
1176 | |
1177 | memcpy(&x->id, &orig->id, sizeof(x->id)); | |
1178 | memcpy(&x->sel, &orig->sel, sizeof(x->sel)); | |
1179 | memcpy(&x->lft, &orig->lft, sizeof(x->lft)); | |
1180 | x->props.mode = orig->props.mode; | |
1181 | x->props.replay_window = orig->props.replay_window; | |
1182 | x->props.reqid = orig->props.reqid; | |
1183 | x->props.family = orig->props.family; | |
1184 | x->props.saddr = orig->props.saddr; | |
1185 | ||
1186 | if (orig->aalg) { | |
4447bb33 | 1187 | x->aalg = xfrm_algo_auth_clone(orig->aalg); |
80c9abaa SS |
1188 | if (!x->aalg) |
1189 | goto error; | |
1190 | } | |
1191 | x->props.aalgo = orig->props.aalgo; | |
1192 | ||
ee5c2317 SK |
1193 | if (orig->aead) { |
1194 | x->aead = xfrm_algo_aead_clone(orig->aead); | |
1195 | if (!x->aead) | |
1196 | goto error; | |
1197 | } | |
80c9abaa SS |
1198 | if (orig->ealg) { |
1199 | x->ealg = xfrm_algo_clone(orig->ealg); | |
1200 | if (!x->ealg) | |
1201 | goto error; | |
1202 | } | |
1203 | x->props.ealgo = orig->props.ealgo; | |
1204 | ||
1205 | if (orig->calg) { | |
1206 | x->calg = xfrm_algo_clone(orig->calg); | |
1207 | if (!x->calg) | |
1208 | goto error; | |
1209 | } | |
1210 | x->props.calgo = orig->props.calgo; | |
1211 | ||
a716c119 | 1212 | if (orig->encap) { |
80c9abaa SS |
1213 | x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL); |
1214 | if (!x->encap) | |
1215 | goto error; | |
1216 | } | |
1217 | ||
1218 | if (orig->coaddr) { | |
1219 | x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr), | |
1220 | GFP_KERNEL); | |
1221 | if (!x->coaddr) | |
1222 | goto error; | |
1223 | } | |
1224 | ||
af2f464e | 1225 | if (orig->replay_esn) { |
cc9ab60e | 1226 | if (xfrm_replay_clone(x, orig)) |
af2f464e SK |
1227 | goto error; |
1228 | } | |
1229 | ||
bd55775c JHS |
1230 | memcpy(&x->mark, &orig->mark, sizeof(x->mark)); |
1231 | ||
cc9ab60e | 1232 | if (xfrm_init_state(x) < 0) |
80c9abaa SS |
1233 | goto error; |
1234 | ||
1235 | x->props.flags = orig->props.flags; | |
a947b0a9 | 1236 | x->props.extra_flags = orig->props.extra_flags; |
80c9abaa | 1237 | |
ee5c2317 SK |
1238 | x->tfcpad = orig->tfcpad; |
1239 | x->replay_maxdiff = orig->replay_maxdiff; | |
1240 | x->replay_maxage = orig->replay_maxage; | |
80c9abaa SS |
1241 | x->curlft.add_time = orig->curlft.add_time; |
1242 | x->km.state = orig->km.state; | |
1243 | x->km.seq = orig->km.seq; | |
1244 | ||
1245 | return x; | |
1246 | ||
1247 | error: | |
553f9118 HX |
1248 | xfrm_state_put(x); |
1249 | out: | |
80c9abaa SS |
1250 | return NULL; |
1251 | } | |
80c9abaa | 1252 | |
283bc9f3 | 1253 | struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net) |
80c9abaa SS |
1254 | { |
1255 | unsigned int h; | |
8c0cba22 SK |
1256 | struct xfrm_state *x = NULL; |
1257 | ||
1258 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
80c9abaa SS |
1259 | |
1260 | if (m->reqid) { | |
283bc9f3 | 1261 | h = xfrm_dst_hash(net, &m->old_daddr, &m->old_saddr, |
80c9abaa | 1262 | m->reqid, m->old_family); |
283bc9f3 | 1263 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
80c9abaa SS |
1264 | if (x->props.mode != m->mode || |
1265 | x->id.proto != m->proto) | |
1266 | continue; | |
1267 | if (m->reqid && x->props.reqid != m->reqid) | |
1268 | continue; | |
70e94e66 YH |
1269 | if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr, |
1270 | m->old_family) || | |
1271 | !xfrm_addr_equal(&x->props.saddr, &m->old_saddr, | |
1272 | m->old_family)) | |
80c9abaa SS |
1273 | continue; |
1274 | xfrm_state_hold(x); | |
8c0cba22 | 1275 | break; |
80c9abaa SS |
1276 | } |
1277 | } else { | |
283bc9f3 | 1278 | h = xfrm_src_hash(net, &m->old_daddr, &m->old_saddr, |
80c9abaa | 1279 | m->old_family); |
283bc9f3 | 1280 | hlist_for_each_entry(x, net->xfrm.state_bysrc+h, bysrc) { |
80c9abaa SS |
1281 | if (x->props.mode != m->mode || |
1282 | x->id.proto != m->proto) | |
1283 | continue; | |
70e94e66 YH |
1284 | if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr, |
1285 | m->old_family) || | |
1286 | !xfrm_addr_equal(&x->props.saddr, &m->old_saddr, | |
1287 | m->old_family)) | |
80c9abaa SS |
1288 | continue; |
1289 | xfrm_state_hold(x); | |
8c0cba22 | 1290 | break; |
80c9abaa SS |
1291 | } |
1292 | } | |
1293 | ||
8c0cba22 SK |
1294 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1295 | ||
1296 | return x; | |
80c9abaa SS |
1297 | } |
1298 | EXPORT_SYMBOL(xfrm_migrate_state_find); | |
1299 | ||
3e94c2dc WC |
1300 | struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, |
1301 | struct xfrm_migrate *m) | |
80c9abaa SS |
1302 | { |
1303 | struct xfrm_state *xc; | |
80c9abaa | 1304 | |
cc9ab60e | 1305 | xc = xfrm_state_clone(x); |
80c9abaa SS |
1306 | if (!xc) |
1307 | return NULL; | |
1308 | ||
1309 | memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr)); | |
1310 | memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr)); | |
1311 | ||
1312 | /* add state */ | |
70e94e66 | 1313 | if (xfrm_addr_equal(&x->id.daddr, &m->new_daddr, m->new_family)) { |
80c9abaa SS |
1314 | /* a care is needed when the destination address of the |
1315 | state is to be updated as it is a part of triplet */ | |
1316 | xfrm_state_insert(xc); | |
1317 | } else { | |
cc9ab60e | 1318 | if (xfrm_state_add(xc) < 0) |
80c9abaa SS |
1319 | goto error; |
1320 | } | |
1321 | ||
1322 | return xc; | |
1323 | error: | |
78347c8c | 1324 | xfrm_state_put(xc); |
80c9abaa SS |
1325 | return NULL; |
1326 | } | |
1327 | EXPORT_SYMBOL(xfrm_state_migrate); | |
1328 | #endif | |
1329 | ||
1da177e4 LT |
1330 | int xfrm_state_update(struct xfrm_state *x) |
1331 | { | |
37b08e34 | 1332 | struct xfrm_state *x1, *to_put; |
1da177e4 | 1333 | int err; |
eb2971b6 | 1334 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
283bc9f3 | 1335 | struct net *net = xs_net(x); |
1da177e4 | 1336 | |
37b08e34 DM |
1337 | to_put = NULL; |
1338 | ||
283bc9f3 | 1339 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
edcd5821 | 1340 | x1 = __xfrm_state_locate(x, use_spi, x->props.family); |
1da177e4 LT |
1341 | |
1342 | err = -ESRCH; | |
1343 | if (!x1) | |
1344 | goto out; | |
1345 | ||
1346 | if (xfrm_state_kern(x1)) { | |
37b08e34 | 1347 | to_put = x1; |
1da177e4 LT |
1348 | err = -EEXIST; |
1349 | goto out; | |
1350 | } | |
1351 | ||
1352 | if (x1->km.state == XFRM_STATE_ACQ) { | |
1353 | __xfrm_state_insert(x); | |
1354 | x = NULL; | |
1355 | } | |
1356 | err = 0; | |
1357 | ||
1358 | out: | |
283bc9f3 | 1359 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 1360 | |
37b08e34 DM |
1361 | if (to_put) |
1362 | xfrm_state_put(to_put); | |
1363 | ||
1da177e4 LT |
1364 | if (err) |
1365 | return err; | |
1366 | ||
1367 | if (!x) { | |
1368 | xfrm_state_delete(x1); | |
1369 | xfrm_state_put(x1); | |
1370 | return 0; | |
1371 | } | |
1372 | ||
1373 | err = -EINVAL; | |
1374 | spin_lock_bh(&x1->lock); | |
1375 | if (likely(x1->km.state == XFRM_STATE_VALID)) { | |
1376 | if (x->encap && x1->encap) | |
1377 | memcpy(x1->encap, x->encap, sizeof(*x1->encap)); | |
060f02a3 NT |
1378 | if (x->coaddr && x1->coaddr) { |
1379 | memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr)); | |
1380 | } | |
1381 | if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel))) | |
1382 | memcpy(&x1->sel, &x->sel, sizeof(x1->sel)); | |
1da177e4 LT |
1383 | memcpy(&x1->lft, &x->lft, sizeof(x1->lft)); |
1384 | x1->km.dying = 0; | |
1385 | ||
9e0d57fd | 1386 | tasklet_hrtimer_start(&x1->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL); |
1da177e4 LT |
1387 | if (x1->curlft.use_time) |
1388 | xfrm_state_check_expire(x1); | |
1389 | ||
1390 | err = 0; | |
8fcbc637 TG |
1391 | x->km.state = XFRM_STATE_DEAD; |
1392 | __xfrm_state_put(x); | |
1da177e4 LT |
1393 | } |
1394 | spin_unlock_bh(&x1->lock); | |
1395 | ||
1396 | xfrm_state_put(x1); | |
1397 | ||
1398 | return err; | |
1399 | } | |
1400 | EXPORT_SYMBOL(xfrm_state_update); | |
1401 | ||
1402 | int xfrm_state_check_expire(struct xfrm_state *x) | |
1403 | { | |
1404 | if (!x->curlft.use_time) | |
9d729f72 | 1405 | x->curlft.use_time = get_seconds(); |
1da177e4 | 1406 | |
1da177e4 LT |
1407 | if (x->curlft.bytes >= x->lft.hard_byte_limit || |
1408 | x->curlft.packets >= x->lft.hard_packet_limit) { | |
4666faab | 1409 | x->km.state = XFRM_STATE_EXPIRED; |
9b7a787d | 1410 | tasklet_hrtimer_start(&x->mtimer, ktime_set(0, 0), HRTIMER_MODE_REL); |
1da177e4 LT |
1411 | return -EINVAL; |
1412 | } | |
1413 | ||
1414 | if (!x->km.dying && | |
1415 | (x->curlft.bytes >= x->lft.soft_byte_limit || | |
4666faab HX |
1416 | x->curlft.packets >= x->lft.soft_packet_limit)) { |
1417 | x->km.dying = 1; | |
53bc6b4d | 1418 | km_state_expired(x, 0, 0); |
4666faab | 1419 | } |
1da177e4 LT |
1420 | return 0; |
1421 | } | |
1422 | EXPORT_SYMBOL(xfrm_state_check_expire); | |
1423 | ||
1da177e4 | 1424 | struct xfrm_state * |
a70486f0 | 1425 | xfrm_state_lookup(struct net *net, u32 mark, const xfrm_address_t *daddr, __be32 spi, |
bd55775c | 1426 | u8 proto, unsigned short family) |
1da177e4 LT |
1427 | { |
1428 | struct xfrm_state *x; | |
1da177e4 | 1429 | |
283bc9f3 | 1430 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1431 | x = __xfrm_state_lookup(net, mark, daddr, spi, proto, family); |
283bc9f3 | 1432 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1433 | return x; |
1434 | } | |
1435 | EXPORT_SYMBOL(xfrm_state_lookup); | |
1436 | ||
1437 | struct xfrm_state * | |
bd55775c | 1438 | xfrm_state_lookup_byaddr(struct net *net, u32 mark, |
a70486f0 | 1439 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
eb2971b6 MN |
1440 | u8 proto, unsigned short family) |
1441 | { | |
1442 | struct xfrm_state *x; | |
eb2971b6 | 1443 | |
283bc9f3 | 1444 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1445 | x = __xfrm_state_lookup_byaddr(net, mark, daddr, saddr, proto, family); |
283bc9f3 | 1446 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
eb2971b6 MN |
1447 | return x; |
1448 | } | |
1449 | EXPORT_SYMBOL(xfrm_state_lookup_byaddr); | |
1450 | ||
1451 | struct xfrm_state * | |
e473fcb4 MK |
1452 | xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, u8 mode, u32 reqid, |
1453 | u8 proto, const xfrm_address_t *daddr, | |
1454 | const xfrm_address_t *saddr, int create, unsigned short family) | |
1da177e4 LT |
1455 | { |
1456 | struct xfrm_state *x; | |
1da177e4 | 1457 | |
283bc9f3 | 1458 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1459 | x = __find_acq_core(net, mark, family, mode, reqid, proto, daddr, saddr, create); |
283bc9f3 | 1460 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
2770834c | 1461 | |
1da177e4 LT |
1462 | return x; |
1463 | } | |
1464 | EXPORT_SYMBOL(xfrm_find_acq); | |
1465 | ||
41a49cc3 MN |
1466 | #ifdef CONFIG_XFRM_SUB_POLICY |
1467 | int | |
1468 | xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, | |
283bc9f3 | 1469 | unsigned short family, struct net *net) |
41a49cc3 MN |
1470 | { |
1471 | int err = 0; | |
1472 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
1473 | if (!afinfo) | |
1474 | return -EAFNOSUPPORT; | |
1475 | ||
283bc9f3 | 1476 | spin_lock_bh(&net->xfrm.xfrm_state_lock); /*FIXME*/ |
41a49cc3 MN |
1477 | if (afinfo->tmpl_sort) |
1478 | err = afinfo->tmpl_sort(dst, src, n); | |
283bc9f3 | 1479 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
41a49cc3 MN |
1480 | xfrm_state_put_afinfo(afinfo); |
1481 | return err; | |
1482 | } | |
1483 | EXPORT_SYMBOL(xfrm_tmpl_sort); | |
1484 | ||
1485 | int | |
1486 | xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, | |
1487 | unsigned short family) | |
1488 | { | |
1489 | int err = 0; | |
1490 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
35ea790d | 1491 | struct net *net = xs_net(*src); |
283bc9f3 | 1492 | |
41a49cc3 MN |
1493 | if (!afinfo) |
1494 | return -EAFNOSUPPORT; | |
1495 | ||
283bc9f3 | 1496 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
41a49cc3 MN |
1497 | if (afinfo->state_sort) |
1498 | err = afinfo->state_sort(dst, src, n); | |
283bc9f3 | 1499 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
41a49cc3 MN |
1500 | xfrm_state_put_afinfo(afinfo); |
1501 | return err; | |
1502 | } | |
1503 | EXPORT_SYMBOL(xfrm_state_sort); | |
1504 | #endif | |
1505 | ||
1da177e4 LT |
1506 | /* Silly enough, but I'm lazy to build resolution list */ |
1507 | ||
bd55775c | 1508 | static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq) |
1da177e4 LT |
1509 | { |
1510 | int i; | |
1da177e4 | 1511 | |
5447c5e4 | 1512 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
8f126e37 DM |
1513 | struct xfrm_state *x; |
1514 | ||
b67bfe0d | 1515 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
8f126e37 | 1516 | if (x->km.seq == seq && |
3d6acfa7 | 1517 | (mark & x->mark.m) == x->mark.v && |
8f126e37 | 1518 | x->km.state == XFRM_STATE_ACQ) { |
1da177e4 LT |
1519 | xfrm_state_hold(x); |
1520 | return x; | |
1521 | } | |
1522 | } | |
1523 | } | |
1524 | return NULL; | |
1525 | } | |
1526 | ||
bd55775c | 1527 | struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq) |
1da177e4 LT |
1528 | { |
1529 | struct xfrm_state *x; | |
1530 | ||
283bc9f3 | 1531 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1532 | x = __xfrm_find_acq_byseq(net, mark, seq); |
283bc9f3 | 1533 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1534 | return x; |
1535 | } | |
1536 | EXPORT_SYMBOL(xfrm_find_acq_byseq); | |
1537 | ||
1538 | u32 xfrm_get_acqseq(void) | |
1539 | { | |
1540 | u32 res; | |
6836b9bd | 1541 | static atomic_t acqseq; |
1542 | ||
1543 | do { | |
1544 | res = atomic_inc_return(&acqseq); | |
1545 | } while (!res); | |
1da177e4 | 1546 | |
1da177e4 LT |
1547 | return res; |
1548 | } | |
1549 | EXPORT_SYMBOL(xfrm_get_acqseq); | |
1550 | ||
776e9dd9 FD |
1551 | int verify_spi_info(u8 proto, u32 min, u32 max) |
1552 | { | |
1553 | switch (proto) { | |
1554 | case IPPROTO_AH: | |
1555 | case IPPROTO_ESP: | |
1556 | break; | |
1557 | ||
1558 | case IPPROTO_COMP: | |
1559 | /* IPCOMP spi is 16-bits. */ | |
1560 | if (max >= 0x10000) | |
1561 | return -EINVAL; | |
1562 | break; | |
1563 | ||
1564 | default: | |
1565 | return -EINVAL; | |
1566 | } | |
1567 | ||
1568 | if (min > max) | |
1569 | return -EINVAL; | |
1570 | ||
1571 | return 0; | |
1572 | } | |
1573 | EXPORT_SYMBOL(verify_spi_info); | |
1574 | ||
658b219e | 1575 | int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high) |
1da177e4 | 1576 | { |
221df1ed | 1577 | struct net *net = xs_net(x); |
f034b5d4 | 1578 | unsigned int h; |
1da177e4 | 1579 | struct xfrm_state *x0; |
658b219e HX |
1580 | int err = -ENOENT; |
1581 | __be32 minspi = htonl(low); | |
1582 | __be32 maxspi = htonl(high); | |
bd55775c | 1583 | u32 mark = x->mark.v & x->mark.m; |
1da177e4 | 1584 | |
658b219e HX |
1585 | spin_lock_bh(&x->lock); |
1586 | if (x->km.state == XFRM_STATE_DEAD) | |
1587 | goto unlock; | |
1588 | ||
1589 | err = 0; | |
1da177e4 | 1590 | if (x->id.spi) |
658b219e HX |
1591 | goto unlock; |
1592 | ||
1593 | err = -ENOENT; | |
1da177e4 LT |
1594 | |
1595 | if (minspi == maxspi) { | |
bd55775c | 1596 | x0 = xfrm_state_lookup(net, mark, &x->id.daddr, minspi, x->id.proto, x->props.family); |
1da177e4 LT |
1597 | if (x0) { |
1598 | xfrm_state_put(x0); | |
658b219e | 1599 | goto unlock; |
1da177e4 LT |
1600 | } |
1601 | x->id.spi = minspi; | |
1602 | } else { | |
1603 | u32 spi = 0; | |
9b7a787d | 1604 | for (h = 0; h < high-low+1; h++) { |
63862b5b | 1605 | spi = low + prandom_u32()%(high-low+1); |
bd55775c | 1606 | x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family); |
1da177e4 LT |
1607 | if (x0 == NULL) { |
1608 | x->id.spi = htonl(spi); | |
1609 | break; | |
1610 | } | |
1611 | xfrm_state_put(x0); | |
1612 | } | |
1613 | } | |
1614 | if (x->id.spi) { | |
283bc9f3 | 1615 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12604d8a | 1616 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family); |
ae3fb6d3 | 1617 | hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h); |
283bc9f3 | 1618 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
658b219e HX |
1619 | |
1620 | err = 0; | |
1da177e4 | 1621 | } |
658b219e HX |
1622 | |
1623 | unlock: | |
1624 | spin_unlock_bh(&x->lock); | |
1625 | ||
1626 | return err; | |
1da177e4 LT |
1627 | } |
1628 | EXPORT_SYMBOL(xfrm_alloc_spi); | |
1629 | ||
d3623099 | 1630 | static bool __xfrm_state_filter_match(struct xfrm_state *x, |
870a2df4 | 1631 | struct xfrm_address_filter *filter) |
d3623099 ND |
1632 | { |
1633 | if (filter) { | |
1634 | if ((filter->family == AF_INET || | |
1635 | filter->family == AF_INET6) && | |
1636 | x->props.family != filter->family) | |
1637 | return false; | |
1638 | ||
1639 | return addr_match(&x->props.saddr, &filter->saddr, | |
1640 | filter->splen) && | |
1641 | addr_match(&x->id.daddr, &filter->daddr, | |
1642 | filter->dplen); | |
1643 | } | |
1644 | return true; | |
1645 | } | |
1646 | ||
284fa7da | 1647 | int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, |
4c563f76 | 1648 | int (*func)(struct xfrm_state *, int, void*), |
1da177e4 LT |
1649 | void *data) |
1650 | { | |
12a169e7 HX |
1651 | struct xfrm_state *state; |
1652 | struct xfrm_state_walk *x; | |
1da177e4 LT |
1653 | int err = 0; |
1654 | ||
12a169e7 | 1655 | if (walk->seq != 0 && list_empty(&walk->all)) |
4c563f76 TT |
1656 | return 0; |
1657 | ||
283bc9f3 | 1658 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12a169e7 | 1659 | if (list_empty(&walk->all)) |
284fa7da | 1660 | x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all); |
12a169e7 | 1661 | else |
80077702 | 1662 | x = list_first_entry(&walk->all, struct xfrm_state_walk, all); |
284fa7da | 1663 | list_for_each_entry_from(x, &net->xfrm.state_all, all) { |
12a169e7 | 1664 | if (x->state == XFRM_STATE_DEAD) |
4c563f76 | 1665 | continue; |
12a169e7 HX |
1666 | state = container_of(x, struct xfrm_state, km); |
1667 | if (!xfrm_id_proto_match(state->id.proto, walk->proto)) | |
4c563f76 | 1668 | continue; |
d3623099 ND |
1669 | if (!__xfrm_state_filter_match(state, walk->filter)) |
1670 | continue; | |
12a169e7 HX |
1671 | err = func(state, walk->seq, data); |
1672 | if (err) { | |
1673 | list_move_tail(&walk->all, &x->all); | |
1674 | goto out; | |
1da177e4 | 1675 | } |
12a169e7 | 1676 | walk->seq++; |
1da177e4 | 1677 | } |
12a169e7 | 1678 | if (walk->seq == 0) { |
1da177e4 LT |
1679 | err = -ENOENT; |
1680 | goto out; | |
1681 | } | |
12a169e7 | 1682 | list_del_init(&walk->all); |
1da177e4 | 1683 | out: |
283bc9f3 | 1684 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1685 | return err; |
1686 | } | |
1687 | EXPORT_SYMBOL(xfrm_state_walk); | |
1688 | ||
d3623099 | 1689 | void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto, |
870a2df4 | 1690 | struct xfrm_address_filter *filter) |
5c182458 | 1691 | { |
12a169e7 | 1692 | INIT_LIST_HEAD(&walk->all); |
5c182458 | 1693 | walk->proto = proto; |
12a169e7 HX |
1694 | walk->state = XFRM_STATE_DEAD; |
1695 | walk->seq = 0; | |
d3623099 | 1696 | walk->filter = filter; |
5c182458 HX |
1697 | } |
1698 | EXPORT_SYMBOL(xfrm_state_walk_init); | |
1699 | ||
283bc9f3 | 1700 | void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net) |
abb81c4f | 1701 | { |
d3623099 ND |
1702 | kfree(walk->filter); |
1703 | ||
12a169e7 | 1704 | if (list_empty(&walk->all)) |
5c182458 | 1705 | return; |
5c182458 | 1706 | |
283bc9f3 | 1707 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12a169e7 | 1708 | list_del(&walk->all); |
283bc9f3 | 1709 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
abb81c4f HX |
1710 | } |
1711 | EXPORT_SYMBOL(xfrm_state_walk_done); | |
1712 | ||
f8cd5488 JHS |
1713 | static void xfrm_replay_timer_handler(unsigned long data) |
1714 | { | |
3e94c2dc | 1715 | struct xfrm_state *x = (struct xfrm_state *)data; |
f8cd5488 JHS |
1716 | |
1717 | spin_lock(&x->lock); | |
1718 | ||
2717096a | 1719 | if (x->km.state == XFRM_STATE_VALID) { |
a6483b79 | 1720 | if (xfrm_aevent_is_on(xs_net(x))) |
9fdc4883 | 1721 | x->repl->notify(x, XFRM_REPLAY_TIMEOUT); |
2717096a JHS |
1722 | else |
1723 | x->xflags |= XFRM_TIME_DEFER; | |
1724 | } | |
f8cd5488 JHS |
1725 | |
1726 | spin_unlock(&x->lock); | |
1727 | } | |
1728 | ||
df01812e | 1729 | static LIST_HEAD(xfrm_km_list); |
1da177e4 | 1730 | |
214e005b | 1731 | void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
1da177e4 LT |
1732 | { |
1733 | struct xfrm_mgr *km; | |
1734 | ||
85168c00 CW |
1735 | rcu_read_lock(); |
1736 | list_for_each_entry_rcu(km, &xfrm_km_list, list) | |
26b15dad JHS |
1737 | if (km->notify_policy) |
1738 | km->notify_policy(xp, dir, c); | |
85168c00 | 1739 | rcu_read_unlock(); |
26b15dad | 1740 | } |
1da177e4 | 1741 | |
214e005b | 1742 | void km_state_notify(struct xfrm_state *x, const struct km_event *c) |
26b15dad JHS |
1743 | { |
1744 | struct xfrm_mgr *km; | |
85168c00 CW |
1745 | rcu_read_lock(); |
1746 | list_for_each_entry_rcu(km, &xfrm_km_list, list) | |
26b15dad JHS |
1747 | if (km->notify) |
1748 | km->notify(x, c); | |
85168c00 | 1749 | rcu_read_unlock(); |
26b15dad JHS |
1750 | } |
1751 | ||
1752 | EXPORT_SYMBOL(km_policy_notify); | |
1753 | EXPORT_SYMBOL(km_state_notify); | |
1754 | ||
15e47304 | 1755 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid) |
26b15dad JHS |
1756 | { |
1757 | struct km_event c; | |
1758 | ||
bf08867f | 1759 | c.data.hard = hard; |
15e47304 | 1760 | c.portid = portid; |
f60f6b8f | 1761 | c.event = XFRM_MSG_EXPIRE; |
26b15dad | 1762 | km_state_notify(x, &c); |
1da177e4 LT |
1763 | } |
1764 | ||
53bc6b4d | 1765 | EXPORT_SYMBOL(km_state_expired); |
26b15dad JHS |
1766 | /* |
1767 | * We send to all registered managers regardless of failure | |
1768 | * We are happy with one success | |
1769 | */ | |
980ebd25 | 1770 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol) |
1da177e4 | 1771 | { |
26b15dad | 1772 | int err = -EINVAL, acqret; |
1da177e4 LT |
1773 | struct xfrm_mgr *km; |
1774 | ||
85168c00 CW |
1775 | rcu_read_lock(); |
1776 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
65e0736b | 1777 | acqret = km->acquire(x, t, pol); |
26b15dad JHS |
1778 | if (!acqret) |
1779 | err = acqret; | |
1da177e4 | 1780 | } |
85168c00 | 1781 | rcu_read_unlock(); |
1da177e4 LT |
1782 | return err; |
1783 | } | |
980ebd25 | 1784 | EXPORT_SYMBOL(km_query); |
1da177e4 | 1785 | |
5d36b180 | 1786 | int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) |
1da177e4 LT |
1787 | { |
1788 | int err = -EINVAL; | |
1789 | struct xfrm_mgr *km; | |
1790 | ||
85168c00 CW |
1791 | rcu_read_lock(); |
1792 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
1da177e4 LT |
1793 | if (km->new_mapping) |
1794 | err = km->new_mapping(x, ipaddr, sport); | |
1795 | if (!err) | |
1796 | break; | |
1797 | } | |
85168c00 | 1798 | rcu_read_unlock(); |
1da177e4 LT |
1799 | return err; |
1800 | } | |
1801 | EXPORT_SYMBOL(km_new_mapping); | |
1802 | ||
15e47304 | 1803 | void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid) |
1da177e4 | 1804 | { |
26b15dad | 1805 | struct km_event c; |
1da177e4 | 1806 | |
bf08867f | 1807 | c.data.hard = hard; |
15e47304 | 1808 | c.portid = portid; |
f60f6b8f | 1809 | c.event = XFRM_MSG_POLEXPIRE; |
26b15dad | 1810 | km_policy_notify(pol, dir, &c); |
1da177e4 | 1811 | } |
a70fcb0b | 1812 | EXPORT_SYMBOL(km_policy_expired); |
1da177e4 | 1813 | |
2d60abc2 | 1814 | #ifdef CONFIG_XFRM_MIGRATE |
183cad12 DM |
1815 | int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1816 | const struct xfrm_migrate *m, int num_migrate, | |
1817 | const struct xfrm_kmaddress *k) | |
80c9abaa SS |
1818 | { |
1819 | int err = -EINVAL; | |
1820 | int ret; | |
1821 | struct xfrm_mgr *km; | |
1822 | ||
85168c00 CW |
1823 | rcu_read_lock(); |
1824 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
80c9abaa | 1825 | if (km->migrate) { |
13c1d189 | 1826 | ret = km->migrate(sel, dir, type, m, num_migrate, k); |
80c9abaa SS |
1827 | if (!ret) |
1828 | err = ret; | |
1829 | } | |
1830 | } | |
85168c00 | 1831 | rcu_read_unlock(); |
80c9abaa SS |
1832 | return err; |
1833 | } | |
1834 | EXPORT_SYMBOL(km_migrate); | |
2d60abc2 | 1835 | #endif |
80c9abaa | 1836 | |
db983c11 | 1837 | int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr) |
97a64b45 MN |
1838 | { |
1839 | int err = -EINVAL; | |
1840 | int ret; | |
1841 | struct xfrm_mgr *km; | |
1842 | ||
85168c00 CW |
1843 | rcu_read_lock(); |
1844 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
97a64b45 | 1845 | if (km->report) { |
db983c11 | 1846 | ret = km->report(net, proto, sel, addr); |
97a64b45 MN |
1847 | if (!ret) |
1848 | err = ret; | |
1849 | } | |
1850 | } | |
85168c00 | 1851 | rcu_read_unlock(); |
97a64b45 MN |
1852 | return err; |
1853 | } | |
1854 | EXPORT_SYMBOL(km_report); | |
1855 | ||
0f24558e HG |
1856 | bool km_is_alive(const struct km_event *c) |
1857 | { | |
1858 | struct xfrm_mgr *km; | |
1859 | bool is_alive = false; | |
1860 | ||
1861 | rcu_read_lock(); | |
1862 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
1863 | if (km->is_alive && km->is_alive(c)) { | |
1864 | is_alive = true; | |
1865 | break; | |
1866 | } | |
1867 | } | |
1868 | rcu_read_unlock(); | |
1869 | ||
1870 | return is_alive; | |
1871 | } | |
1872 | EXPORT_SYMBOL(km_is_alive); | |
1873 | ||
1da177e4 LT |
1874 | int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) |
1875 | { | |
1876 | int err; | |
1877 | u8 *data; | |
1878 | struct xfrm_mgr *km; | |
1879 | struct xfrm_policy *pol = NULL; | |
1880 | ||
1881 | if (optlen <= 0 || optlen > PAGE_SIZE) | |
1882 | return -EMSGSIZE; | |
1883 | ||
1884 | data = kmalloc(optlen, GFP_KERNEL); | |
1885 | if (!data) | |
1886 | return -ENOMEM; | |
1887 | ||
1888 | err = -EFAULT; | |
1889 | if (copy_from_user(data, optval, optlen)) | |
1890 | goto out; | |
1891 | ||
1892 | err = -EINVAL; | |
85168c00 CW |
1893 | rcu_read_lock(); |
1894 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
cb969f07 | 1895 | pol = km->compile_policy(sk, optname, data, |
1da177e4 LT |
1896 | optlen, &err); |
1897 | if (err >= 0) | |
1898 | break; | |
1899 | } | |
85168c00 | 1900 | rcu_read_unlock(); |
1da177e4 LT |
1901 | |
1902 | if (err >= 0) { | |
1903 | xfrm_sk_policy_insert(sk, err, pol); | |
1904 | xfrm_pol_put(pol); | |
1905 | err = 0; | |
1906 | } | |
1907 | ||
1908 | out: | |
1909 | kfree(data); | |
1910 | return err; | |
1911 | } | |
1912 | EXPORT_SYMBOL(xfrm_user_policy); | |
1913 | ||
85168c00 CW |
1914 | static DEFINE_SPINLOCK(xfrm_km_lock); |
1915 | ||
1da177e4 LT |
1916 | int xfrm_register_km(struct xfrm_mgr *km) |
1917 | { | |
85168c00 CW |
1918 | spin_lock_bh(&xfrm_km_lock); |
1919 | list_add_tail_rcu(&km->list, &xfrm_km_list); | |
1920 | spin_unlock_bh(&xfrm_km_lock); | |
1da177e4 LT |
1921 | return 0; |
1922 | } | |
1923 | EXPORT_SYMBOL(xfrm_register_km); | |
1924 | ||
1925 | int xfrm_unregister_km(struct xfrm_mgr *km) | |
1926 | { | |
85168c00 CW |
1927 | spin_lock_bh(&xfrm_km_lock); |
1928 | list_del_rcu(&km->list); | |
1929 | spin_unlock_bh(&xfrm_km_lock); | |
1930 | synchronize_rcu(); | |
1da177e4 LT |
1931 | return 0; |
1932 | } | |
1933 | EXPORT_SYMBOL(xfrm_unregister_km); | |
1934 | ||
1935 | int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo) | |
1936 | { | |
1937 | int err = 0; | |
1938 | if (unlikely(afinfo == NULL)) | |
1939 | return -EINVAL; | |
1940 | if (unlikely(afinfo->family >= NPROTO)) | |
1941 | return -EAFNOSUPPORT; | |
44abdc30 | 1942 | spin_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 | 1943 | if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL)) |
f31e8d4f | 1944 | err = -EEXIST; |
edcd5821 | 1945 | else |
44abdc30 CW |
1946 | rcu_assign_pointer(xfrm_state_afinfo[afinfo->family], afinfo); |
1947 | spin_unlock_bh(&xfrm_state_afinfo_lock); | |
1da177e4 LT |
1948 | return err; |
1949 | } | |
1950 | EXPORT_SYMBOL(xfrm_state_register_afinfo); | |
1951 | ||
1952 | int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo) | |
1953 | { | |
1954 | int err = 0; | |
1955 | if (unlikely(afinfo == NULL)) | |
1956 | return -EINVAL; | |
1957 | if (unlikely(afinfo->family >= NPROTO)) | |
1958 | return -EAFNOSUPPORT; | |
44abdc30 | 1959 | spin_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1960 | if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) { |
1961 | if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo)) | |
1962 | err = -EINVAL; | |
edcd5821 | 1963 | else |
44abdc30 | 1964 | RCU_INIT_POINTER(xfrm_state_afinfo[afinfo->family], NULL); |
1da177e4 | 1965 | } |
44abdc30 CW |
1966 | spin_unlock_bh(&xfrm_state_afinfo_lock); |
1967 | synchronize_rcu(); | |
1da177e4 LT |
1968 | return err; |
1969 | } | |
1970 | EXPORT_SYMBOL(xfrm_state_unregister_afinfo); | |
1971 | ||
628e341f | 1972 | struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family) |
1da177e4 LT |
1973 | { |
1974 | struct xfrm_state_afinfo *afinfo; | |
1975 | if (unlikely(family >= NPROTO)) | |
1976 | return NULL; | |
44abdc30 CW |
1977 | rcu_read_lock(); |
1978 | afinfo = rcu_dereference(xfrm_state_afinfo[family]); | |
546be240 | 1979 | if (unlikely(!afinfo)) |
44abdc30 | 1980 | rcu_read_unlock(); |
1da177e4 LT |
1981 | return afinfo; |
1982 | } | |
1983 | ||
628e341f | 1984 | void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo) |
1da177e4 | 1985 | { |
44abdc30 | 1986 | rcu_read_unlock(); |
1da177e4 LT |
1987 | } |
1988 | ||
1989 | /* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */ | |
1990 | void xfrm_state_delete_tunnel(struct xfrm_state *x) | |
1991 | { | |
1992 | if (x->tunnel) { | |
1993 | struct xfrm_state *t = x->tunnel; | |
1994 | ||
1995 | if (atomic_read(&t->tunnel_users) == 2) | |
1996 | xfrm_state_delete(t); | |
1997 | atomic_dec(&t->tunnel_users); | |
1998 | xfrm_state_put(t); | |
1999 | x->tunnel = NULL; | |
2000 | } | |
2001 | } | |
2002 | EXPORT_SYMBOL(xfrm_state_delete_tunnel); | |
2003 | ||
2004 | int xfrm_state_mtu(struct xfrm_state *x, int mtu) | |
2005 | { | |
c5c25238 | 2006 | int res; |
1da177e4 | 2007 | |
c5c25238 PM |
2008 | spin_lock_bh(&x->lock); |
2009 | if (x->km.state == XFRM_STATE_VALID && | |
2010 | x->type && x->type->get_mtu) | |
2011 | res = x->type->get_mtu(x, mtu); | |
2012 | else | |
28121617 | 2013 | res = mtu - x->props.header_len; |
c5c25238 | 2014 | spin_unlock_bh(&x->lock); |
1da177e4 LT |
2015 | return res; |
2016 | } | |
2017 | ||
a454f0cc | 2018 | int __xfrm_init_state(struct xfrm_state *x, bool init_replay) |
72cb6962 | 2019 | { |
d094cd83 | 2020 | struct xfrm_state_afinfo *afinfo; |
df9dcb45 | 2021 | struct xfrm_mode *inner_mode; |
d094cd83 | 2022 | int family = x->props.family; |
72cb6962 HX |
2023 | int err; |
2024 | ||
d094cd83 HX |
2025 | err = -EAFNOSUPPORT; |
2026 | afinfo = xfrm_state_get_afinfo(family); | |
2027 | if (!afinfo) | |
2028 | goto error; | |
2029 | ||
2030 | err = 0; | |
2031 | if (afinfo->init_flags) | |
2032 | err = afinfo->init_flags(x); | |
2033 | ||
2034 | xfrm_state_put_afinfo(afinfo); | |
2035 | ||
2036 | if (err) | |
2037 | goto error; | |
2038 | ||
2039 | err = -EPROTONOSUPPORT; | |
13996378 | 2040 | |
df9dcb45 KM |
2041 | if (x->sel.family != AF_UNSPEC) { |
2042 | inner_mode = xfrm_get_mode(x->props.mode, x->sel.family); | |
2043 | if (inner_mode == NULL) | |
2044 | goto error; | |
2045 | ||
2046 | if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) && | |
2047 | family != x->sel.family) { | |
2048 | xfrm_put_mode(inner_mode); | |
2049 | goto error; | |
2050 | } | |
2051 | ||
2052 | x->inner_mode = inner_mode; | |
2053 | } else { | |
2054 | struct xfrm_mode *inner_mode_iaf; | |
d81d2285 | 2055 | int iafamily = AF_INET; |
df9dcb45 | 2056 | |
d81d2285 | 2057 | inner_mode = xfrm_get_mode(x->props.mode, x->props.family); |
df9dcb45 KM |
2058 | if (inner_mode == NULL) |
2059 | goto error; | |
2060 | ||
2061 | if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) { | |
2062 | xfrm_put_mode(inner_mode); | |
2063 | goto error; | |
2064 | } | |
d81d2285 | 2065 | x->inner_mode = inner_mode; |
df9dcb45 | 2066 | |
d81d2285 MW |
2067 | if (x->props.family == AF_INET) |
2068 | iafamily = AF_INET6; | |
df9dcb45 | 2069 | |
d81d2285 MW |
2070 | inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily); |
2071 | if (inner_mode_iaf) { | |
2072 | if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL) | |
2073 | x->inner_mode_iaf = inner_mode_iaf; | |
2074 | else | |
2075 | xfrm_put_mode(inner_mode_iaf); | |
df9dcb45 KM |
2076 | } |
2077 | } | |
13996378 | 2078 | |
d094cd83 | 2079 | x->type = xfrm_get_type(x->id.proto, family); |
72cb6962 HX |
2080 | if (x->type == NULL) |
2081 | goto error; | |
2082 | ||
2083 | err = x->type->init_state(x); | |
2084 | if (err) | |
2085 | goto error; | |
2086 | ||
13996378 | 2087 | x->outer_mode = xfrm_get_mode(x->props.mode, family); |
599901c3 JL |
2088 | if (x->outer_mode == NULL) { |
2089 | err = -EPROTONOSUPPORT; | |
b59f45d0 | 2090 | goto error; |
599901c3 | 2091 | } |
b59f45d0 | 2092 | |
a454f0cc WY |
2093 | if (init_replay) { |
2094 | err = xfrm_init_replay(x); | |
2095 | if (err) | |
2096 | goto error; | |
2097 | } | |
2098 | ||
72cb6962 HX |
2099 | x->km.state = XFRM_STATE_VALID; |
2100 | ||
2101 | error: | |
2102 | return err; | |
2103 | } | |
2104 | ||
a454f0cc WY |
2105 | EXPORT_SYMBOL(__xfrm_init_state); |
2106 | ||
2107 | int xfrm_init_state(struct xfrm_state *x) | |
2108 | { | |
2109 | return __xfrm_init_state(x, true); | |
2110 | } | |
2111 | ||
72cb6962 | 2112 | EXPORT_SYMBOL(xfrm_init_state); |
a716c119 | 2113 | |
d62ddc21 | 2114 | int __net_init xfrm_state_init(struct net *net) |
1da177e4 | 2115 | { |
f034b5d4 DM |
2116 | unsigned int sz; |
2117 | ||
9d4139c7 AD |
2118 | INIT_LIST_HEAD(&net->xfrm.state_all); |
2119 | ||
f034b5d4 DM |
2120 | sz = sizeof(struct hlist_head) * 8; |
2121 | ||
73d189dc AD |
2122 | net->xfrm.state_bydst = xfrm_hash_alloc(sz); |
2123 | if (!net->xfrm.state_bydst) | |
2124 | goto out_bydst; | |
d320bbb3 AD |
2125 | net->xfrm.state_bysrc = xfrm_hash_alloc(sz); |
2126 | if (!net->xfrm.state_bysrc) | |
2127 | goto out_bysrc; | |
b754a4fd AD |
2128 | net->xfrm.state_byspi = xfrm_hash_alloc(sz); |
2129 | if (!net->xfrm.state_byspi) | |
2130 | goto out_byspi; | |
529983ec | 2131 | net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1); |
1da177e4 | 2132 | |
0bf7c5b0 | 2133 | net->xfrm.state_num = 0; |
63082733 | 2134 | INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize); |
b8a0ae20 | 2135 | INIT_HLIST_HEAD(&net->xfrm.state_gc_list); |
c7837144 | 2136 | INIT_WORK(&net->xfrm.state_gc_work, xfrm_state_gc_task); |
283bc9f3 | 2137 | spin_lock_init(&net->xfrm.xfrm_state_lock); |
d62ddc21 | 2138 | return 0; |
73d189dc | 2139 | |
b754a4fd AD |
2140 | out_byspi: |
2141 | xfrm_hash_free(net->xfrm.state_bysrc, sz); | |
d320bbb3 AD |
2142 | out_bysrc: |
2143 | xfrm_hash_free(net->xfrm.state_bydst, sz); | |
73d189dc AD |
2144 | out_bydst: |
2145 | return -ENOMEM; | |
d62ddc21 AD |
2146 | } |
2147 | ||
2148 | void xfrm_state_fini(struct net *net) | |
2149 | { | |
73d189dc AD |
2150 | unsigned int sz; |
2151 | ||
7c2776ee | 2152 | flush_work(&net->xfrm.state_hash_work); |
2e71029e | 2153 | xfrm_state_flush(net, IPSEC_PROTO_ANY, false); |
7c2776ee AD |
2154 | flush_work(&net->xfrm.state_gc_work); |
2155 | ||
9d4139c7 | 2156 | WARN_ON(!list_empty(&net->xfrm.state_all)); |
73d189dc | 2157 | |
529983ec | 2158 | sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head); |
b754a4fd AD |
2159 | WARN_ON(!hlist_empty(net->xfrm.state_byspi)); |
2160 | xfrm_hash_free(net->xfrm.state_byspi, sz); | |
d320bbb3 AD |
2161 | WARN_ON(!hlist_empty(net->xfrm.state_bysrc)); |
2162 | xfrm_hash_free(net->xfrm.state_bysrc, sz); | |
73d189dc AD |
2163 | WARN_ON(!hlist_empty(net->xfrm.state_bydst)); |
2164 | xfrm_hash_free(net->xfrm.state_bydst, sz); | |
1da177e4 LT |
2165 | } |
2166 | ||
ab5f5e8b | 2167 | #ifdef CONFIG_AUDITSYSCALL |
cf35f43e IJ |
2168 | static void xfrm_audit_helper_sainfo(struct xfrm_state *x, |
2169 | struct audit_buffer *audit_buf) | |
ab5f5e8b | 2170 | { |
68277acc PM |
2171 | struct xfrm_sec_ctx *ctx = x->security; |
2172 | u32 spi = ntohl(x->id.spi); | |
2173 | ||
2174 | if (ctx) | |
ab5f5e8b | 2175 | audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s", |
68277acc | 2176 | ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str); |
ab5f5e8b | 2177 | |
9b7a787d | 2178 | switch (x->props.family) { |
ab5f5e8b | 2179 | case AF_INET: |
21454aaa HH |
2180 | audit_log_format(audit_buf, " src=%pI4 dst=%pI4", |
2181 | &x->props.saddr.a4, &x->id.daddr.a4); | |
ab5f5e8b JL |
2182 | break; |
2183 | case AF_INET6: | |
5b095d98 | 2184 | audit_log_format(audit_buf, " src=%pI6 dst=%pI6", |
fdb46ee7 | 2185 | x->props.saddr.a6, x->id.daddr.a6); |
ab5f5e8b JL |
2186 | break; |
2187 | } | |
68277acc PM |
2188 | |
2189 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
ab5f5e8b JL |
2190 | } |
2191 | ||
cf35f43e IJ |
2192 | static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family, |
2193 | struct audit_buffer *audit_buf) | |
afeb14b4 | 2194 | { |
b71d1d42 ED |
2195 | const struct iphdr *iph4; |
2196 | const struct ipv6hdr *iph6; | |
afeb14b4 PM |
2197 | |
2198 | switch (family) { | |
2199 | case AF_INET: | |
2200 | iph4 = ip_hdr(skb); | |
21454aaa HH |
2201 | audit_log_format(audit_buf, " src=%pI4 dst=%pI4", |
2202 | &iph4->saddr, &iph4->daddr); | |
afeb14b4 PM |
2203 | break; |
2204 | case AF_INET6: | |
2205 | iph6 = ipv6_hdr(skb); | |
2206 | audit_log_format(audit_buf, | |
5b095d98 | 2207 | " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x", |
9b7a787d | 2208 | &iph6->saddr, &iph6->daddr, |
afeb14b4 PM |
2209 | iph6->flow_lbl[0] & 0x0f, |
2210 | iph6->flow_lbl[1], | |
2211 | iph6->flow_lbl[2]); | |
2212 | break; | |
2213 | } | |
2214 | } | |
2215 | ||
2e71029e | 2216 | void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid) |
ab5f5e8b JL |
2217 | { |
2218 | struct audit_buffer *audit_buf; | |
ab5f5e8b | 2219 | |
afeb14b4 | 2220 | audit_buf = xfrm_audit_start("SAD-add"); |
ab5f5e8b JL |
2221 | if (audit_buf == NULL) |
2222 | return; | |
2e71029e | 2223 | xfrm_audit_helper_usrinfo(task_valid, audit_buf); |
afeb14b4 PM |
2224 | xfrm_audit_helper_sainfo(x, audit_buf); |
2225 | audit_log_format(audit_buf, " res=%u", result); | |
ab5f5e8b JL |
2226 | audit_log_end(audit_buf); |
2227 | } | |
2228 | EXPORT_SYMBOL_GPL(xfrm_audit_state_add); | |
2229 | ||
2e71029e | 2230 | void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid) |
ab5f5e8b JL |
2231 | { |
2232 | struct audit_buffer *audit_buf; | |
ab5f5e8b | 2233 | |
afeb14b4 | 2234 | audit_buf = xfrm_audit_start("SAD-delete"); |
ab5f5e8b JL |
2235 | if (audit_buf == NULL) |
2236 | return; | |
2e71029e | 2237 | xfrm_audit_helper_usrinfo(task_valid, audit_buf); |
afeb14b4 PM |
2238 | xfrm_audit_helper_sainfo(x, audit_buf); |
2239 | audit_log_format(audit_buf, " res=%u", result); | |
ab5f5e8b JL |
2240 | audit_log_end(audit_buf); |
2241 | } | |
2242 | EXPORT_SYMBOL_GPL(xfrm_audit_state_delete); | |
afeb14b4 PM |
2243 | |
2244 | void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
2245 | struct sk_buff *skb) | |
2246 | { | |
2247 | struct audit_buffer *audit_buf; | |
2248 | u32 spi; | |
2249 | ||
2250 | audit_buf = xfrm_audit_start("SA-replay-overflow"); | |
2251 | if (audit_buf == NULL) | |
2252 | return; | |
2253 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2254 | /* don't record the sequence number because it's inherent in this kind | |
2255 | * of audit message */ | |
2256 | spi = ntohl(x->id.spi); | |
2257 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
2258 | audit_log_end(audit_buf); | |
2259 | } | |
2260 | EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow); | |
2261 | ||
9fdc4883 | 2262 | void xfrm_audit_state_replay(struct xfrm_state *x, |
afeb14b4 PM |
2263 | struct sk_buff *skb, __be32 net_seq) |
2264 | { | |
2265 | struct audit_buffer *audit_buf; | |
2266 | u32 spi; | |
2267 | ||
2268 | audit_buf = xfrm_audit_start("SA-replayed-pkt"); | |
2269 | if (audit_buf == NULL) | |
2270 | return; | |
2271 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2272 | spi = ntohl(x->id.spi); | |
2273 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2274 | spi, spi, ntohl(net_seq)); | |
2275 | audit_log_end(audit_buf); | |
2276 | } | |
9fdc4883 | 2277 | EXPORT_SYMBOL_GPL(xfrm_audit_state_replay); |
afeb14b4 PM |
2278 | |
2279 | void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family) | |
2280 | { | |
2281 | struct audit_buffer *audit_buf; | |
2282 | ||
2283 | audit_buf = xfrm_audit_start("SA-notfound"); | |
2284 | if (audit_buf == NULL) | |
2285 | return; | |
2286 | xfrm_audit_helper_pktinfo(skb, family, audit_buf); | |
2287 | audit_log_end(audit_buf); | |
2288 | } | |
2289 | EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple); | |
2290 | ||
2291 | void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
2292 | __be32 net_spi, __be32 net_seq) | |
2293 | { | |
2294 | struct audit_buffer *audit_buf; | |
2295 | u32 spi; | |
2296 | ||
2297 | audit_buf = xfrm_audit_start("SA-notfound"); | |
2298 | if (audit_buf == NULL) | |
2299 | return; | |
2300 | xfrm_audit_helper_pktinfo(skb, family, audit_buf); | |
2301 | spi = ntohl(net_spi); | |
2302 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2303 | spi, spi, ntohl(net_seq)); | |
2304 | audit_log_end(audit_buf); | |
2305 | } | |
2306 | EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound); | |
2307 | ||
2308 | void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
2309 | struct sk_buff *skb, u8 proto) | |
2310 | { | |
2311 | struct audit_buffer *audit_buf; | |
2312 | __be32 net_spi; | |
2313 | __be32 net_seq; | |
2314 | ||
2315 | audit_buf = xfrm_audit_start("SA-icv-failure"); | |
2316 | if (audit_buf == NULL) | |
2317 | return; | |
2318 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2319 | if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) { | |
2320 | u32 spi = ntohl(net_spi); | |
2321 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2322 | spi, spi, ntohl(net_seq)); | |
2323 | } | |
2324 | audit_log_end(audit_buf); | |
2325 | } | |
2326 | EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail); | |
ab5f5e8b | 2327 | #endif /* CONFIG_AUDITSYSCALL */ |