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