Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * xfrm_state.c | |
3 | * | |
4 | * Changes: | |
5 | * Mitsuru KANDA @USAGI | |
6 | * Kazunori MIYAZAWA @USAGI | |
7 | * Kunihiro Ishiguro <kunihiro@ipinfusion.com> | |
8 | * IPv6 support | |
9 | * YOSHIFUJI Hideaki @USAGI | |
10 | * Split up af-specific functions | |
11 | * Derek Atkins <derek@ihtfp.com> | |
12 | * Add UDP Encapsulation | |
df71837d | 13 | * |
1da177e4 LT |
14 | */ |
15 | ||
16 | #include <linux/workqueue.h> | |
17 | #include <net/xfrm.h> | |
18 | #include <linux/pfkeyv2.h> | |
19 | #include <linux/ipsec.h> | |
20 | #include <linux/module.h> | |
f034b5d4 | 21 | #include <linux/cache.h> |
b5890d8b | 22 | #include <asm/uaccess.h> |
1da177e4 | 23 | |
44e36b42 DM |
24 | #include "xfrm_hash.h" |
25 | ||
ee857a7d DM |
26 | struct sock *xfrm_nl; |
27 | EXPORT_SYMBOL(xfrm_nl); | |
28 | ||
01e67d08 | 29 | u32 sysctl_xfrm_aevent_etime __read_mostly = XFRM_AE_ETIME; |
a70fcb0b DM |
30 | EXPORT_SYMBOL(sysctl_xfrm_aevent_etime); |
31 | ||
01e67d08 | 32 | u32 sysctl_xfrm_aevent_rseqth __read_mostly = XFRM_AE_SEQT_SIZE; |
a70fcb0b DM |
33 | EXPORT_SYMBOL(sysctl_xfrm_aevent_rseqth); |
34 | ||
01e67d08 DM |
35 | u32 sysctl_xfrm_acq_expires __read_mostly = 30; |
36 | ||
1da177e4 LT |
37 | /* Each xfrm_state may be linked to two tables: |
38 | ||
39 | 1. Hash table by (spi,daddr,ah/esp) to find SA by SPI. (input,ctl) | |
a624c108 | 40 | 2. Hash table by (daddr,family,reqid) to find what SAs exist for given |
1da177e4 LT |
41 | destination/tunnel endpoint. (output) |
42 | */ | |
43 | ||
44 | static DEFINE_SPINLOCK(xfrm_state_lock); | |
45 | ||
46 | /* Hash table to find appropriate SA towards given target (endpoint | |
47 | * of tunnel or destination of transport mode) allowed by selector. | |
48 | * | |
49 | * Main use is finding SA after policy selected tunnel or transport mode. | |
50 | * Also, it can be used by ah/esp icmp error handler to find offending SA. | |
51 | */ | |
f034b5d4 DM |
52 | static struct hlist_head *xfrm_state_bydst __read_mostly; |
53 | static struct hlist_head *xfrm_state_bysrc __read_mostly; | |
54 | static struct hlist_head *xfrm_state_byspi __read_mostly; | |
55 | static unsigned int xfrm_state_hmask __read_mostly; | |
56 | static unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024; | |
57 | static unsigned int xfrm_state_num; | |
9d4a706d | 58 | static unsigned int xfrm_state_genid; |
f034b5d4 | 59 | |
17c2a42a HX |
60 | static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family); |
61 | static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo); | |
62 | ||
c1969f29 DM |
63 | static inline unsigned int xfrm_dst_hash(xfrm_address_t *daddr, |
64 | xfrm_address_t *saddr, | |
65 | u32 reqid, | |
a624c108 | 66 | unsigned short family) |
f034b5d4 | 67 | { |
c1969f29 | 68 | return __xfrm_dst_hash(daddr, saddr, reqid, family, xfrm_state_hmask); |
f034b5d4 DM |
69 | } |
70 | ||
667bbcb6 MN |
71 | static inline unsigned int xfrm_src_hash(xfrm_address_t *daddr, |
72 | xfrm_address_t *saddr, | |
44e36b42 | 73 | unsigned short family) |
f034b5d4 | 74 | { |
667bbcb6 | 75 | return __xfrm_src_hash(daddr, saddr, family, xfrm_state_hmask); |
f034b5d4 DM |
76 | } |
77 | ||
f034b5d4 | 78 | static inline unsigned int |
8122adf0 | 79 | xfrm_spi_hash(xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family) |
f034b5d4 | 80 | { |
c1969f29 | 81 | return __xfrm_spi_hash(daddr, spi, proto, family, xfrm_state_hmask); |
f034b5d4 DM |
82 | } |
83 | ||
f034b5d4 DM |
84 | static void xfrm_hash_transfer(struct hlist_head *list, |
85 | struct hlist_head *ndsttable, | |
86 | struct hlist_head *nsrctable, | |
87 | struct hlist_head *nspitable, | |
88 | unsigned int nhashmask) | |
89 | { | |
90 | struct hlist_node *entry, *tmp; | |
91 | struct xfrm_state *x; | |
92 | ||
93 | hlist_for_each_entry_safe(x, entry, tmp, list, bydst) { | |
94 | unsigned int h; | |
95 | ||
c1969f29 DM |
96 | h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr, |
97 | x->props.reqid, x->props.family, | |
98 | nhashmask); | |
f034b5d4 DM |
99 | hlist_add_head(&x->bydst, ndsttable+h); |
100 | ||
667bbcb6 MN |
101 | h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr, |
102 | x->props.family, | |
f034b5d4 DM |
103 | nhashmask); |
104 | hlist_add_head(&x->bysrc, nsrctable+h); | |
105 | ||
7b4dc360 MN |
106 | if (x->id.spi) { |
107 | h = __xfrm_spi_hash(&x->id.daddr, x->id.spi, | |
108 | x->id.proto, x->props.family, | |
109 | nhashmask); | |
110 | hlist_add_head(&x->byspi, nspitable+h); | |
111 | } | |
f034b5d4 DM |
112 | } |
113 | } | |
114 | ||
115 | static unsigned long xfrm_hash_new_size(void) | |
116 | { | |
117 | return ((xfrm_state_hmask + 1) << 1) * | |
118 | sizeof(struct hlist_head); | |
119 | } | |
120 | ||
121 | static DEFINE_MUTEX(hash_resize_mutex); | |
122 | ||
c4028958 | 123 | static void xfrm_hash_resize(struct work_struct *__unused) |
f034b5d4 DM |
124 | { |
125 | struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi; | |
126 | unsigned long nsize, osize; | |
127 | unsigned int nhashmask, ohashmask; | |
128 | int i; | |
129 | ||
130 | mutex_lock(&hash_resize_mutex); | |
131 | ||
132 | nsize = xfrm_hash_new_size(); | |
44e36b42 | 133 | ndst = xfrm_hash_alloc(nsize); |
f034b5d4 DM |
134 | if (!ndst) |
135 | goto out_unlock; | |
44e36b42 | 136 | nsrc = xfrm_hash_alloc(nsize); |
f034b5d4 | 137 | if (!nsrc) { |
44e36b42 | 138 | xfrm_hash_free(ndst, nsize); |
f034b5d4 DM |
139 | goto out_unlock; |
140 | } | |
44e36b42 | 141 | nspi = xfrm_hash_alloc(nsize); |
f034b5d4 | 142 | if (!nspi) { |
44e36b42 DM |
143 | xfrm_hash_free(ndst, nsize); |
144 | xfrm_hash_free(nsrc, nsize); | |
f034b5d4 DM |
145 | goto out_unlock; |
146 | } | |
147 | ||
148 | spin_lock_bh(&xfrm_state_lock); | |
149 | ||
150 | nhashmask = (nsize / sizeof(struct hlist_head)) - 1U; | |
151 | for (i = xfrm_state_hmask; i >= 0; i--) | |
152 | xfrm_hash_transfer(xfrm_state_bydst+i, ndst, nsrc, nspi, | |
153 | nhashmask); | |
154 | ||
155 | odst = xfrm_state_bydst; | |
156 | osrc = xfrm_state_bysrc; | |
157 | ospi = xfrm_state_byspi; | |
158 | ohashmask = xfrm_state_hmask; | |
159 | ||
160 | xfrm_state_bydst = ndst; | |
161 | xfrm_state_bysrc = nsrc; | |
162 | xfrm_state_byspi = nspi; | |
163 | xfrm_state_hmask = nhashmask; | |
164 | ||
165 | spin_unlock_bh(&xfrm_state_lock); | |
166 | ||
167 | osize = (ohashmask + 1) * sizeof(struct hlist_head); | |
44e36b42 DM |
168 | xfrm_hash_free(odst, osize); |
169 | xfrm_hash_free(osrc, osize); | |
170 | xfrm_hash_free(ospi, osize); | |
f034b5d4 DM |
171 | |
172 | out_unlock: | |
173 | mutex_unlock(&hash_resize_mutex); | |
174 | } | |
175 | ||
c4028958 | 176 | static DECLARE_WORK(xfrm_hash_work, xfrm_hash_resize); |
f034b5d4 | 177 | |
1da177e4 LT |
178 | DECLARE_WAIT_QUEUE_HEAD(km_waitq); |
179 | EXPORT_SYMBOL(km_waitq); | |
180 | ||
181 | static DEFINE_RWLOCK(xfrm_state_afinfo_lock); | |
182 | static struct xfrm_state_afinfo *xfrm_state_afinfo[NPROTO]; | |
183 | ||
184 | static struct work_struct xfrm_state_gc_work; | |
8f126e37 | 185 | static HLIST_HEAD(xfrm_state_gc_list); |
1da177e4 LT |
186 | static DEFINE_SPINLOCK(xfrm_state_gc_lock); |
187 | ||
53bc6b4d | 188 | int __xfrm_state_delete(struct xfrm_state *x); |
1da177e4 | 189 | |
980ebd25 | 190 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); |
53bc6b4d | 191 | void km_state_expired(struct xfrm_state *x, int hard, u32 pid); |
1da177e4 | 192 | |
aa5d62cc HX |
193 | static struct xfrm_state_afinfo *xfrm_state_lock_afinfo(unsigned int family) |
194 | { | |
195 | struct xfrm_state_afinfo *afinfo; | |
196 | if (unlikely(family >= NPROTO)) | |
197 | return NULL; | |
198 | write_lock_bh(&xfrm_state_afinfo_lock); | |
199 | afinfo = xfrm_state_afinfo[family]; | |
200 | if (unlikely(!afinfo)) | |
201 | write_unlock_bh(&xfrm_state_afinfo_lock); | |
202 | return afinfo; | |
203 | } | |
204 | ||
205 | static void xfrm_state_unlock_afinfo(struct xfrm_state_afinfo *afinfo) | |
206 | { | |
207 | write_unlock_bh(&xfrm_state_afinfo_lock); | |
208 | } | |
209 | ||
210 | int xfrm_register_type(struct xfrm_type *type, unsigned short family) | |
211 | { | |
212 | struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family); | |
213 | struct xfrm_type **typemap; | |
214 | int err = 0; | |
215 | ||
216 | if (unlikely(afinfo == NULL)) | |
217 | return -EAFNOSUPPORT; | |
218 | typemap = afinfo->type_map; | |
219 | ||
220 | if (likely(typemap[type->proto] == NULL)) | |
221 | typemap[type->proto] = type; | |
222 | else | |
223 | err = -EEXIST; | |
224 | xfrm_state_unlock_afinfo(afinfo); | |
225 | return err; | |
226 | } | |
227 | EXPORT_SYMBOL(xfrm_register_type); | |
228 | ||
229 | int xfrm_unregister_type(struct xfrm_type *type, unsigned short family) | |
230 | { | |
231 | struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family); | |
232 | struct xfrm_type **typemap; | |
233 | int err = 0; | |
234 | ||
235 | if (unlikely(afinfo == NULL)) | |
236 | return -EAFNOSUPPORT; | |
237 | typemap = afinfo->type_map; | |
238 | ||
239 | if (unlikely(typemap[type->proto] != type)) | |
240 | err = -ENOENT; | |
241 | else | |
242 | typemap[type->proto] = NULL; | |
243 | xfrm_state_unlock_afinfo(afinfo); | |
244 | return err; | |
245 | } | |
246 | EXPORT_SYMBOL(xfrm_unregister_type); | |
247 | ||
248 | static struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family) | |
249 | { | |
250 | struct xfrm_state_afinfo *afinfo; | |
251 | struct xfrm_type **typemap; | |
252 | struct xfrm_type *type; | |
253 | int modload_attempted = 0; | |
254 | ||
255 | retry: | |
256 | afinfo = xfrm_state_get_afinfo(family); | |
257 | if (unlikely(afinfo == NULL)) | |
258 | return NULL; | |
259 | typemap = afinfo->type_map; | |
260 | ||
261 | type = typemap[proto]; | |
262 | if (unlikely(type && !try_module_get(type->owner))) | |
263 | type = NULL; | |
264 | if (!type && !modload_attempted) { | |
265 | xfrm_state_put_afinfo(afinfo); | |
266 | request_module("xfrm-type-%d-%d", family, proto); | |
267 | modload_attempted = 1; | |
268 | goto retry; | |
269 | } | |
270 | ||
271 | xfrm_state_put_afinfo(afinfo); | |
272 | return type; | |
273 | } | |
274 | ||
275 | static void xfrm_put_type(struct xfrm_type *type) | |
276 | { | |
277 | module_put(type->owner); | |
278 | } | |
279 | ||
280 | int xfrm_register_mode(struct xfrm_mode *mode, int family) | |
281 | { | |
282 | struct xfrm_state_afinfo *afinfo; | |
283 | struct xfrm_mode **modemap; | |
284 | int err; | |
285 | ||
286 | if (unlikely(mode->encap >= XFRM_MODE_MAX)) | |
287 | return -EINVAL; | |
288 | ||
289 | afinfo = xfrm_state_lock_afinfo(family); | |
290 | if (unlikely(afinfo == NULL)) | |
291 | return -EAFNOSUPPORT; | |
292 | ||
293 | err = -EEXIST; | |
294 | modemap = afinfo->mode_map; | |
17c2a42a HX |
295 | if (modemap[mode->encap]) |
296 | goto out; | |
aa5d62cc | 297 | |
17c2a42a HX |
298 | err = -ENOENT; |
299 | if (!try_module_get(afinfo->owner)) | |
300 | goto out; | |
301 | ||
302 | mode->afinfo = afinfo; | |
303 | modemap[mode->encap] = mode; | |
304 | err = 0; | |
305 | ||
306 | out: | |
aa5d62cc HX |
307 | xfrm_state_unlock_afinfo(afinfo); |
308 | return err; | |
309 | } | |
310 | EXPORT_SYMBOL(xfrm_register_mode); | |
311 | ||
312 | int xfrm_unregister_mode(struct xfrm_mode *mode, int family) | |
313 | { | |
314 | struct xfrm_state_afinfo *afinfo; | |
315 | struct xfrm_mode **modemap; | |
316 | int err; | |
317 | ||
318 | if (unlikely(mode->encap >= XFRM_MODE_MAX)) | |
319 | return -EINVAL; | |
320 | ||
321 | afinfo = xfrm_state_lock_afinfo(family); | |
322 | if (unlikely(afinfo == NULL)) | |
323 | return -EAFNOSUPPORT; | |
324 | ||
325 | err = -ENOENT; | |
326 | modemap = afinfo->mode_map; | |
327 | if (likely(modemap[mode->encap] == mode)) { | |
328 | modemap[mode->encap] = NULL; | |
17c2a42a | 329 | module_put(mode->afinfo->owner); |
aa5d62cc HX |
330 | err = 0; |
331 | } | |
332 | ||
333 | xfrm_state_unlock_afinfo(afinfo); | |
334 | return err; | |
335 | } | |
336 | EXPORT_SYMBOL(xfrm_unregister_mode); | |
337 | ||
338 | static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family) | |
339 | { | |
340 | struct xfrm_state_afinfo *afinfo; | |
341 | struct xfrm_mode *mode; | |
342 | int modload_attempted = 0; | |
343 | ||
344 | if (unlikely(encap >= XFRM_MODE_MAX)) | |
345 | return NULL; | |
346 | ||
347 | retry: | |
348 | afinfo = xfrm_state_get_afinfo(family); | |
349 | if (unlikely(afinfo == NULL)) | |
350 | return NULL; | |
351 | ||
352 | mode = afinfo->mode_map[encap]; | |
353 | if (unlikely(mode && !try_module_get(mode->owner))) | |
354 | mode = NULL; | |
355 | if (!mode && !modload_attempted) { | |
356 | xfrm_state_put_afinfo(afinfo); | |
357 | request_module("xfrm-mode-%d-%d", family, encap); | |
358 | modload_attempted = 1; | |
359 | goto retry; | |
360 | } | |
361 | ||
362 | xfrm_state_put_afinfo(afinfo); | |
363 | return mode; | |
364 | } | |
365 | ||
366 | static void xfrm_put_mode(struct xfrm_mode *mode) | |
367 | { | |
368 | module_put(mode->owner); | |
369 | } | |
370 | ||
1da177e4 LT |
371 | static void xfrm_state_gc_destroy(struct xfrm_state *x) |
372 | { | |
a47f0ce0 DM |
373 | del_timer_sync(&x->timer); |
374 | del_timer_sync(&x->rtimer); | |
a51482bd JJ |
375 | kfree(x->aalg); |
376 | kfree(x->ealg); | |
377 | kfree(x->calg); | |
378 | kfree(x->encap); | |
060f02a3 | 379 | kfree(x->coaddr); |
13996378 HX |
380 | if (x->inner_mode) |
381 | xfrm_put_mode(x->inner_mode); | |
382 | if (x->outer_mode) | |
383 | xfrm_put_mode(x->outer_mode); | |
1da177e4 LT |
384 | if (x->type) { |
385 | x->type->destructor(x); | |
386 | xfrm_put_type(x->type); | |
387 | } | |
df71837d | 388 | security_xfrm_state_free(x); |
1da177e4 LT |
389 | kfree(x); |
390 | } | |
391 | ||
c4028958 | 392 | static void xfrm_state_gc_task(struct work_struct *data) |
1da177e4 LT |
393 | { |
394 | struct xfrm_state *x; | |
8f126e37 DM |
395 | struct hlist_node *entry, *tmp; |
396 | struct hlist_head gc_list; | |
1da177e4 | 397 | |
1da177e4 | 398 | spin_lock_bh(&xfrm_state_gc_lock); |
8f126e37 DM |
399 | gc_list.first = xfrm_state_gc_list.first; |
400 | INIT_HLIST_HEAD(&xfrm_state_gc_list); | |
1da177e4 LT |
401 | spin_unlock_bh(&xfrm_state_gc_lock); |
402 | ||
8f126e37 | 403 | hlist_for_each_entry_safe(x, entry, tmp, &gc_list, bydst) |
1da177e4 | 404 | xfrm_state_gc_destroy(x); |
8f126e37 | 405 | |
1da177e4 LT |
406 | wake_up(&km_waitq); |
407 | } | |
408 | ||
409 | static inline unsigned long make_jiffies(long secs) | |
410 | { | |
411 | if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ) | |
412 | return MAX_SCHEDULE_TIMEOUT-1; | |
413 | else | |
a716c119 | 414 | return secs*HZ; |
1da177e4 LT |
415 | } |
416 | ||
417 | static void xfrm_timer_handler(unsigned long data) | |
418 | { | |
419 | struct xfrm_state *x = (struct xfrm_state*)data; | |
9d729f72 | 420 | unsigned long now = get_seconds(); |
1da177e4 LT |
421 | long next = LONG_MAX; |
422 | int warn = 0; | |
161a09e7 | 423 | int err = 0; |
1da177e4 LT |
424 | |
425 | spin_lock(&x->lock); | |
426 | if (x->km.state == XFRM_STATE_DEAD) | |
427 | goto out; | |
428 | if (x->km.state == XFRM_STATE_EXPIRED) | |
429 | goto expired; | |
430 | if (x->lft.hard_add_expires_seconds) { | |
431 | long tmo = x->lft.hard_add_expires_seconds + | |
432 | x->curlft.add_time - now; | |
433 | if (tmo <= 0) | |
434 | goto expired; | |
435 | if (tmo < next) | |
436 | next = tmo; | |
437 | } | |
438 | if (x->lft.hard_use_expires_seconds) { | |
439 | long tmo = x->lft.hard_use_expires_seconds + | |
440 | (x->curlft.use_time ? : now) - now; | |
441 | if (tmo <= 0) | |
442 | goto expired; | |
443 | if (tmo < next) | |
444 | next = tmo; | |
445 | } | |
446 | if (x->km.dying) | |
447 | goto resched; | |
448 | if (x->lft.soft_add_expires_seconds) { | |
449 | long tmo = x->lft.soft_add_expires_seconds + | |
450 | x->curlft.add_time - now; | |
451 | if (tmo <= 0) | |
452 | warn = 1; | |
453 | else if (tmo < next) | |
454 | next = tmo; | |
455 | } | |
456 | if (x->lft.soft_use_expires_seconds) { | |
457 | long tmo = x->lft.soft_use_expires_seconds + | |
458 | (x->curlft.use_time ? : now) - now; | |
459 | if (tmo <= 0) | |
460 | warn = 1; | |
461 | else if (tmo < next) | |
462 | next = tmo; | |
463 | } | |
464 | ||
4666faab | 465 | x->km.dying = warn; |
1da177e4 | 466 | if (warn) |
53bc6b4d | 467 | km_state_expired(x, 0, 0); |
1da177e4 | 468 | resched: |
a47f0ce0 DM |
469 | if (next != LONG_MAX) |
470 | mod_timer(&x->timer, jiffies + make_jiffies(next)); | |
471 | ||
1da177e4 LT |
472 | goto out; |
473 | ||
474 | expired: | |
475 | if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) { | |
476 | x->km.state = XFRM_STATE_EXPIRED; | |
477 | wake_up(&km_waitq); | |
478 | next = 2; | |
479 | goto resched; | |
480 | } | |
161a09e7 JL |
481 | |
482 | err = __xfrm_state_delete(x); | |
483 | if (!err && x->id.spi) | |
53bc6b4d | 484 | km_state_expired(x, 1, 0); |
1da177e4 | 485 | |
ab5f5e8b JL |
486 | xfrm_audit_state_delete(x, err ? 0 : 1, |
487 | audit_get_loginuid(current->audit_context), 0); | |
161a09e7 | 488 | |
1da177e4 LT |
489 | out: |
490 | spin_unlock(&x->lock); | |
1da177e4 LT |
491 | } |
492 | ||
0ac84752 DM |
493 | static void xfrm_replay_timer_handler(unsigned long data); |
494 | ||
1da177e4 LT |
495 | struct xfrm_state *xfrm_state_alloc(void) |
496 | { | |
497 | struct xfrm_state *x; | |
498 | ||
0da974f4 | 499 | x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC); |
1da177e4 LT |
500 | |
501 | if (x) { | |
1da177e4 LT |
502 | atomic_set(&x->refcnt, 1); |
503 | atomic_set(&x->tunnel_users, 0); | |
8f126e37 DM |
504 | INIT_HLIST_NODE(&x->bydst); |
505 | INIT_HLIST_NODE(&x->bysrc); | |
506 | INIT_HLIST_NODE(&x->byspi); | |
b24b8a24 PE |
507 | setup_timer(&x->timer, xfrm_timer_handler, (unsigned long)x); |
508 | setup_timer(&x->rtimer, xfrm_replay_timer_handler, | |
509 | (unsigned long)x); | |
9d729f72 | 510 | x->curlft.add_time = get_seconds(); |
1da177e4 LT |
511 | x->lft.soft_byte_limit = XFRM_INF; |
512 | x->lft.soft_packet_limit = XFRM_INF; | |
513 | x->lft.hard_byte_limit = XFRM_INF; | |
514 | x->lft.hard_packet_limit = XFRM_INF; | |
f8cd5488 JHS |
515 | x->replay_maxage = 0; |
516 | x->replay_maxdiff = 0; | |
1da177e4 LT |
517 | spin_lock_init(&x->lock); |
518 | } | |
519 | return x; | |
520 | } | |
521 | EXPORT_SYMBOL(xfrm_state_alloc); | |
522 | ||
523 | void __xfrm_state_destroy(struct xfrm_state *x) | |
524 | { | |
525 | BUG_TRAP(x->km.state == XFRM_STATE_DEAD); | |
526 | ||
527 | spin_lock_bh(&xfrm_state_gc_lock); | |
8f126e37 | 528 | hlist_add_head(&x->bydst, &xfrm_state_gc_list); |
1da177e4 LT |
529 | spin_unlock_bh(&xfrm_state_gc_lock); |
530 | schedule_work(&xfrm_state_gc_work); | |
531 | } | |
532 | EXPORT_SYMBOL(__xfrm_state_destroy); | |
533 | ||
53bc6b4d | 534 | int __xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 535 | { |
26b15dad JHS |
536 | int err = -ESRCH; |
537 | ||
1da177e4 LT |
538 | if (x->km.state != XFRM_STATE_DEAD) { |
539 | x->km.state = XFRM_STATE_DEAD; | |
540 | spin_lock(&xfrm_state_lock); | |
8f126e37 | 541 | hlist_del(&x->bydst); |
8f126e37 | 542 | hlist_del(&x->bysrc); |
a47f0ce0 | 543 | if (x->id.spi) |
8f126e37 | 544 | hlist_del(&x->byspi); |
f034b5d4 | 545 | xfrm_state_num--; |
1da177e4 | 546 | spin_unlock(&xfrm_state_lock); |
1da177e4 | 547 | |
1da177e4 LT |
548 | /* All xfrm_state objects are created by xfrm_state_alloc. |
549 | * The xfrm_state_alloc call gives a reference, and that | |
550 | * is what we are dropping here. | |
551 | */ | |
5dba4797 | 552 | xfrm_state_put(x); |
26b15dad | 553 | err = 0; |
1da177e4 | 554 | } |
26b15dad JHS |
555 | |
556 | return err; | |
1da177e4 | 557 | } |
53bc6b4d | 558 | EXPORT_SYMBOL(__xfrm_state_delete); |
1da177e4 | 559 | |
26b15dad | 560 | int xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 561 | { |
26b15dad JHS |
562 | int err; |
563 | ||
1da177e4 | 564 | spin_lock_bh(&x->lock); |
26b15dad | 565 | err = __xfrm_state_delete(x); |
1da177e4 | 566 | spin_unlock_bh(&x->lock); |
26b15dad JHS |
567 | |
568 | return err; | |
1da177e4 LT |
569 | } |
570 | EXPORT_SYMBOL(xfrm_state_delete); | |
571 | ||
4aa2e62c JL |
572 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
573 | static inline int | |
574 | xfrm_state_flush_secctx_check(u8 proto, struct xfrm_audit *audit_info) | |
1da177e4 | 575 | { |
4aa2e62c JL |
576 | int i, err = 0; |
577 | ||
578 | for (i = 0; i <= xfrm_state_hmask; i++) { | |
579 | struct hlist_node *entry; | |
580 | struct xfrm_state *x; | |
581 | ||
582 | hlist_for_each_entry(x, entry, xfrm_state_bydst+i, bydst) { | |
583 | if (xfrm_id_proto_match(x->id.proto, proto) && | |
584 | (err = security_xfrm_state_delete(x)) != 0) { | |
ab5f5e8b JL |
585 | xfrm_audit_state_delete(x, 0, |
586 | audit_info->loginuid, | |
587 | audit_info->secid); | |
4aa2e62c JL |
588 | return err; |
589 | } | |
590 | } | |
591 | } | |
592 | ||
593 | return err; | |
594 | } | |
595 | #else | |
596 | static inline int | |
597 | xfrm_state_flush_secctx_check(u8 proto, struct xfrm_audit *audit_info) | |
598 | { | |
599 | return 0; | |
600 | } | |
601 | #endif | |
602 | ||
603 | int xfrm_state_flush(u8 proto, struct xfrm_audit *audit_info) | |
604 | { | |
605 | int i, err = 0; | |
1da177e4 LT |
606 | |
607 | spin_lock_bh(&xfrm_state_lock); | |
4aa2e62c JL |
608 | err = xfrm_state_flush_secctx_check(proto, audit_info); |
609 | if (err) | |
610 | goto out; | |
611 | ||
a9917c06 | 612 | for (i = 0; i <= xfrm_state_hmask; i++) { |
8f126e37 DM |
613 | struct hlist_node *entry; |
614 | struct xfrm_state *x; | |
1da177e4 | 615 | restart: |
8f126e37 | 616 | hlist_for_each_entry(x, entry, xfrm_state_bydst+i, bydst) { |
1da177e4 | 617 | if (!xfrm_state_kern(x) && |
5794708f | 618 | xfrm_id_proto_match(x->id.proto, proto)) { |
1da177e4 LT |
619 | xfrm_state_hold(x); |
620 | spin_unlock_bh(&xfrm_state_lock); | |
621 | ||
161a09e7 | 622 | err = xfrm_state_delete(x); |
ab5f5e8b JL |
623 | xfrm_audit_state_delete(x, err ? 0 : 1, |
624 | audit_info->loginuid, | |
625 | audit_info->secid); | |
1da177e4 LT |
626 | xfrm_state_put(x); |
627 | ||
628 | spin_lock_bh(&xfrm_state_lock); | |
629 | goto restart; | |
630 | } | |
631 | } | |
632 | } | |
4aa2e62c JL |
633 | err = 0; |
634 | ||
635 | out: | |
1da177e4 LT |
636 | spin_unlock_bh(&xfrm_state_lock); |
637 | wake_up(&km_waitq); | |
4aa2e62c | 638 | return err; |
1da177e4 LT |
639 | } |
640 | EXPORT_SYMBOL(xfrm_state_flush); | |
641 | ||
af11e316 | 642 | void xfrm_sad_getinfo(struct xfrmk_sadinfo *si) |
28d8909b JHS |
643 | { |
644 | spin_lock_bh(&xfrm_state_lock); | |
645 | si->sadcnt = xfrm_state_num; | |
646 | si->sadhcnt = xfrm_state_hmask; | |
647 | si->sadhmcnt = xfrm_state_hashmax; | |
648 | spin_unlock_bh(&xfrm_state_lock); | |
649 | } | |
650 | EXPORT_SYMBOL(xfrm_sad_getinfo); | |
651 | ||
1da177e4 LT |
652 | static int |
653 | xfrm_init_tempsel(struct xfrm_state *x, struct flowi *fl, | |
654 | struct xfrm_tmpl *tmpl, | |
655 | xfrm_address_t *daddr, xfrm_address_t *saddr, | |
656 | unsigned short family) | |
657 | { | |
658 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
659 | if (!afinfo) | |
660 | return -1; | |
661 | afinfo->init_tempsel(x, fl, tmpl, daddr, saddr); | |
662 | xfrm_state_put_afinfo(afinfo); | |
663 | return 0; | |
664 | } | |
665 | ||
a94cfd19 | 666 | static struct xfrm_state *__xfrm_state_lookup(xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family) |
edcd5821 DM |
667 | { |
668 | unsigned int h = xfrm_spi_hash(daddr, spi, proto, family); | |
669 | struct xfrm_state *x; | |
8f126e37 | 670 | struct hlist_node *entry; |
edcd5821 | 671 | |
8f126e37 | 672 | hlist_for_each_entry(x, entry, xfrm_state_byspi+h, byspi) { |
edcd5821 DM |
673 | if (x->props.family != family || |
674 | x->id.spi != spi || | |
675 | x->id.proto != proto) | |
676 | continue; | |
677 | ||
678 | switch (family) { | |
679 | case AF_INET: | |
680 | if (x->id.daddr.a4 != daddr->a4) | |
681 | continue; | |
682 | break; | |
683 | case AF_INET6: | |
684 | if (!ipv6_addr_equal((struct in6_addr *)daddr, | |
685 | (struct in6_addr *) | |
686 | x->id.daddr.a6)) | |
687 | continue; | |
688 | break; | |
3ff50b79 | 689 | } |
edcd5821 DM |
690 | |
691 | xfrm_state_hold(x); | |
692 | return x; | |
693 | } | |
694 | ||
695 | return NULL; | |
696 | } | |
697 | ||
698 | static struct xfrm_state *__xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family) | |
699 | { | |
667bbcb6 | 700 | unsigned int h = xfrm_src_hash(daddr, saddr, family); |
edcd5821 | 701 | struct xfrm_state *x; |
8f126e37 | 702 | struct hlist_node *entry; |
edcd5821 | 703 | |
8f126e37 | 704 | hlist_for_each_entry(x, entry, xfrm_state_bysrc+h, bysrc) { |
edcd5821 DM |
705 | if (x->props.family != family || |
706 | x->id.proto != proto) | |
707 | continue; | |
708 | ||
709 | switch (family) { | |
710 | case AF_INET: | |
711 | if (x->id.daddr.a4 != daddr->a4 || | |
712 | x->props.saddr.a4 != saddr->a4) | |
713 | continue; | |
714 | break; | |
715 | case AF_INET6: | |
716 | if (!ipv6_addr_equal((struct in6_addr *)daddr, | |
717 | (struct in6_addr *) | |
718 | x->id.daddr.a6) || | |
719 | !ipv6_addr_equal((struct in6_addr *)saddr, | |
720 | (struct in6_addr *) | |
721 | x->props.saddr.a6)) | |
722 | continue; | |
723 | break; | |
3ff50b79 | 724 | } |
edcd5821 DM |
725 | |
726 | xfrm_state_hold(x); | |
727 | return x; | |
728 | } | |
729 | ||
730 | return NULL; | |
731 | } | |
732 | ||
733 | static inline struct xfrm_state * | |
734 | __xfrm_state_locate(struct xfrm_state *x, int use_spi, int family) | |
735 | { | |
736 | if (use_spi) | |
737 | return __xfrm_state_lookup(&x->id.daddr, x->id.spi, | |
738 | x->id.proto, family); | |
739 | else | |
740 | return __xfrm_state_lookup_byaddr(&x->id.daddr, | |
741 | &x->props.saddr, | |
742 | x->id.proto, family); | |
743 | } | |
744 | ||
2fab22f2 PM |
745 | static void xfrm_hash_grow_check(int have_hash_collision) |
746 | { | |
747 | if (have_hash_collision && | |
748 | (xfrm_state_hmask + 1) < xfrm_state_hashmax && | |
749 | xfrm_state_num > xfrm_state_hmask) | |
750 | schedule_work(&xfrm_hash_work); | |
751 | } | |
752 | ||
1da177e4 | 753 | struct xfrm_state * |
a716c119 | 754 | xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, |
1da177e4 LT |
755 | struct flowi *fl, struct xfrm_tmpl *tmpl, |
756 | struct xfrm_policy *pol, int *err, | |
757 | unsigned short family) | |
758 | { | |
c1969f29 | 759 | unsigned int h = xfrm_dst_hash(daddr, saddr, tmpl->reqid, family); |
8f126e37 | 760 | struct hlist_node *entry; |
1da177e4 LT |
761 | struct xfrm_state *x, *x0; |
762 | int acquire_in_progress = 0; | |
763 | int error = 0; | |
764 | struct xfrm_state *best = NULL; | |
a716c119 | 765 | |
1da177e4 | 766 | spin_lock_bh(&xfrm_state_lock); |
8f126e37 | 767 | hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) { |
1da177e4 LT |
768 | if (x->props.family == family && |
769 | x->props.reqid == tmpl->reqid && | |
fbd9a5b4 | 770 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
1da177e4 LT |
771 | xfrm_state_addr_check(x, daddr, saddr, family) && |
772 | tmpl->mode == x->props.mode && | |
773 | tmpl->id.proto == x->id.proto && | |
774 | (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) { | |
775 | /* Resolution logic: | |
776 | 1. There is a valid state with matching selector. | |
777 | Done. | |
778 | 2. Valid state with inappropriate selector. Skip. | |
779 | ||
780 | Entering area of "sysdeps". | |
781 | ||
782 | 3. If state is not valid, selector is temporary, | |
783 | it selects only session which triggered | |
784 | previous resolution. Key manager will do | |
785 | something to install a state with proper | |
786 | selector. | |
787 | */ | |
788 | if (x->km.state == XFRM_STATE_VALID) { | |
48b8d783 | 789 | if (!xfrm_selector_match(&x->sel, fl, x->sel.family) || |
e0d1caa7 | 790 | !security_xfrm_state_pol_flow_match(x, pol, fl)) |
1da177e4 LT |
791 | continue; |
792 | if (!best || | |
793 | best->km.dying > x->km.dying || | |
794 | (best->km.dying == x->km.dying && | |
795 | best->curlft.add_time < x->curlft.add_time)) | |
796 | best = x; | |
797 | } else if (x->km.state == XFRM_STATE_ACQ) { | |
798 | acquire_in_progress = 1; | |
799 | } else if (x->km.state == XFRM_STATE_ERROR || | |
800 | x->km.state == XFRM_STATE_EXPIRED) { | |
48b8d783 | 801 | if (xfrm_selector_match(&x->sel, fl, x->sel.family) && |
e0d1caa7 | 802 | security_xfrm_state_pol_flow_match(x, pol, fl)) |
1da177e4 LT |
803 | error = -ESRCH; |
804 | } | |
805 | } | |
806 | } | |
807 | ||
808 | x = best; | |
809 | if (!x && !error && !acquire_in_progress) { | |
5c5d281a | 810 | if (tmpl->id.spi && |
edcd5821 DM |
811 | (x0 = __xfrm_state_lookup(daddr, tmpl->id.spi, |
812 | tmpl->id.proto, family)) != NULL) { | |
1da177e4 LT |
813 | xfrm_state_put(x0); |
814 | error = -EEXIST; | |
815 | goto out; | |
816 | } | |
817 | x = xfrm_state_alloc(); | |
818 | if (x == NULL) { | |
819 | error = -ENOMEM; | |
820 | goto out; | |
821 | } | |
822 | /* Initialize temporary selector matching only | |
823 | * to current session. */ | |
824 | xfrm_init_tempsel(x, fl, tmpl, daddr, saddr, family); | |
825 | ||
e0d1caa7 VY |
826 | error = security_xfrm_state_alloc_acquire(x, pol->security, fl->secid); |
827 | if (error) { | |
828 | x->km.state = XFRM_STATE_DEAD; | |
829 | xfrm_state_put(x); | |
830 | x = NULL; | |
831 | goto out; | |
832 | } | |
833 | ||
1da177e4 LT |
834 | if (km_query(x, tmpl, pol) == 0) { |
835 | x->km.state = XFRM_STATE_ACQ; | |
8f126e37 | 836 | hlist_add_head(&x->bydst, xfrm_state_bydst+h); |
667bbcb6 | 837 | h = xfrm_src_hash(daddr, saddr, family); |
8f126e37 | 838 | hlist_add_head(&x->bysrc, xfrm_state_bysrc+h); |
1da177e4 LT |
839 | if (x->id.spi) { |
840 | h = xfrm_spi_hash(&x->id.daddr, x->id.spi, x->id.proto, family); | |
8f126e37 | 841 | hlist_add_head(&x->byspi, xfrm_state_byspi+h); |
1da177e4 | 842 | } |
01e67d08 DM |
843 | x->lft.hard_add_expires_seconds = sysctl_xfrm_acq_expires; |
844 | x->timer.expires = jiffies + sysctl_xfrm_acq_expires*HZ; | |
1da177e4 | 845 | add_timer(&x->timer); |
2fab22f2 PM |
846 | xfrm_state_num++; |
847 | xfrm_hash_grow_check(x->bydst.next != NULL); | |
1da177e4 LT |
848 | } else { |
849 | x->km.state = XFRM_STATE_DEAD; | |
850 | xfrm_state_put(x); | |
851 | x = NULL; | |
852 | error = -ESRCH; | |
853 | } | |
854 | } | |
855 | out: | |
856 | if (x) | |
857 | xfrm_state_hold(x); | |
858 | else | |
859 | *err = acquire_in_progress ? -EAGAIN : error; | |
860 | spin_unlock_bh(&xfrm_state_lock); | |
1da177e4 LT |
861 | return x; |
862 | } | |
863 | ||
628529b6 JHS |
864 | struct xfrm_state * |
865 | xfrm_stateonly_find(xfrm_address_t *daddr, xfrm_address_t *saddr, | |
866 | unsigned short family, u8 mode, u8 proto, u32 reqid) | |
867 | { | |
868 | unsigned int h = xfrm_dst_hash(daddr, saddr, reqid, family); | |
869 | struct xfrm_state *rx = NULL, *x = NULL; | |
870 | struct hlist_node *entry; | |
871 | ||
872 | spin_lock(&xfrm_state_lock); | |
873 | hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) { | |
874 | if (x->props.family == family && | |
875 | x->props.reqid == reqid && | |
876 | !(x->props.flags & XFRM_STATE_WILDRECV) && | |
877 | xfrm_state_addr_check(x, daddr, saddr, family) && | |
878 | mode == x->props.mode && | |
879 | proto == x->id.proto && | |
880 | x->km.state == XFRM_STATE_VALID) { | |
881 | rx = x; | |
882 | break; | |
883 | } | |
884 | } | |
885 | ||
886 | if (rx) | |
887 | xfrm_state_hold(rx); | |
888 | spin_unlock(&xfrm_state_lock); | |
889 | ||
890 | ||
891 | return rx; | |
892 | } | |
893 | EXPORT_SYMBOL(xfrm_stateonly_find); | |
894 | ||
1da177e4 LT |
895 | static void __xfrm_state_insert(struct xfrm_state *x) |
896 | { | |
a624c108 | 897 | unsigned int h; |
1da177e4 | 898 | |
9d4a706d DM |
899 | x->genid = ++xfrm_state_genid; |
900 | ||
c1969f29 DM |
901 | h = xfrm_dst_hash(&x->id.daddr, &x->props.saddr, |
902 | x->props.reqid, x->props.family); | |
8f126e37 | 903 | hlist_add_head(&x->bydst, xfrm_state_bydst+h); |
1da177e4 | 904 | |
667bbcb6 | 905 | h = xfrm_src_hash(&x->id.daddr, &x->props.saddr, x->props.family); |
8f126e37 | 906 | hlist_add_head(&x->bysrc, xfrm_state_bysrc+h); |
1da177e4 | 907 | |
7b4dc360 | 908 | if (x->id.spi) { |
6c44e6b7 MN |
909 | h = xfrm_spi_hash(&x->id.daddr, x->id.spi, x->id.proto, |
910 | x->props.family); | |
911 | ||
8f126e37 | 912 | hlist_add_head(&x->byspi, xfrm_state_byspi+h); |
6c44e6b7 MN |
913 | } |
914 | ||
a47f0ce0 DM |
915 | mod_timer(&x->timer, jiffies + HZ); |
916 | if (x->replay_maxage) | |
917 | mod_timer(&x->rtimer, jiffies + x->replay_maxage); | |
f8cd5488 | 918 | |
1da177e4 | 919 | wake_up(&km_waitq); |
f034b5d4 DM |
920 | |
921 | xfrm_state_num++; | |
922 | ||
918049f0 | 923 | xfrm_hash_grow_check(x->bydst.next != NULL); |
1da177e4 LT |
924 | } |
925 | ||
c7f5ea3a DM |
926 | /* xfrm_state_lock is held */ |
927 | static void __xfrm_state_bump_genids(struct xfrm_state *xnew) | |
928 | { | |
929 | unsigned short family = xnew->props.family; | |
930 | u32 reqid = xnew->props.reqid; | |
931 | struct xfrm_state *x; | |
932 | struct hlist_node *entry; | |
933 | unsigned int h; | |
934 | ||
c1969f29 | 935 | h = xfrm_dst_hash(&xnew->id.daddr, &xnew->props.saddr, reqid, family); |
c7f5ea3a DM |
936 | hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) { |
937 | if (x->props.family == family && | |
938 | x->props.reqid == reqid && | |
c1969f29 DM |
939 | !xfrm_addr_cmp(&x->id.daddr, &xnew->id.daddr, family) && |
940 | !xfrm_addr_cmp(&x->props.saddr, &xnew->props.saddr, family)) | |
c7f5ea3a DM |
941 | x->genid = xfrm_state_genid; |
942 | } | |
943 | } | |
944 | ||
1da177e4 LT |
945 | void xfrm_state_insert(struct xfrm_state *x) |
946 | { | |
947 | spin_lock_bh(&xfrm_state_lock); | |
c7f5ea3a | 948 | __xfrm_state_bump_genids(x); |
1da177e4 LT |
949 | __xfrm_state_insert(x); |
950 | spin_unlock_bh(&xfrm_state_lock); | |
951 | } | |
952 | EXPORT_SYMBOL(xfrm_state_insert); | |
953 | ||
2770834c DM |
954 | /* xfrm_state_lock is held */ |
955 | static struct xfrm_state *__find_acq_core(unsigned short family, u8 mode, u32 reqid, u8 proto, xfrm_address_t *daddr, xfrm_address_t *saddr, int create) | |
956 | { | |
c1969f29 | 957 | unsigned int h = xfrm_dst_hash(daddr, saddr, reqid, family); |
8f126e37 | 958 | struct hlist_node *entry; |
2770834c DM |
959 | struct xfrm_state *x; |
960 | ||
8f126e37 | 961 | hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) { |
2770834c DM |
962 | if (x->props.reqid != reqid || |
963 | x->props.mode != mode || | |
964 | x->props.family != family || | |
965 | x->km.state != XFRM_STATE_ACQ || | |
75e252d9 JL |
966 | x->id.spi != 0 || |
967 | x->id.proto != proto) | |
2770834c DM |
968 | continue; |
969 | ||
970 | switch (family) { | |
971 | case AF_INET: | |
972 | if (x->id.daddr.a4 != daddr->a4 || | |
973 | x->props.saddr.a4 != saddr->a4) | |
974 | continue; | |
975 | break; | |
976 | case AF_INET6: | |
977 | if (!ipv6_addr_equal((struct in6_addr *)x->id.daddr.a6, | |
978 | (struct in6_addr *)daddr) || | |
979 | !ipv6_addr_equal((struct in6_addr *) | |
980 | x->props.saddr.a6, | |
981 | (struct in6_addr *)saddr)) | |
982 | continue; | |
983 | break; | |
3ff50b79 | 984 | } |
2770834c DM |
985 | |
986 | xfrm_state_hold(x); | |
987 | return x; | |
988 | } | |
989 | ||
990 | if (!create) | |
991 | return NULL; | |
992 | ||
993 | x = xfrm_state_alloc(); | |
994 | if (likely(x)) { | |
995 | switch (family) { | |
996 | case AF_INET: | |
997 | x->sel.daddr.a4 = daddr->a4; | |
998 | x->sel.saddr.a4 = saddr->a4; | |
999 | x->sel.prefixlen_d = 32; | |
1000 | x->sel.prefixlen_s = 32; | |
1001 | x->props.saddr.a4 = saddr->a4; | |
1002 | x->id.daddr.a4 = daddr->a4; | |
1003 | break; | |
1004 | ||
1005 | case AF_INET6: | |
1006 | ipv6_addr_copy((struct in6_addr *)x->sel.daddr.a6, | |
1007 | (struct in6_addr *)daddr); | |
1008 | ipv6_addr_copy((struct in6_addr *)x->sel.saddr.a6, | |
1009 | (struct in6_addr *)saddr); | |
1010 | x->sel.prefixlen_d = 128; | |
1011 | x->sel.prefixlen_s = 128; | |
1012 | ipv6_addr_copy((struct in6_addr *)x->props.saddr.a6, | |
1013 | (struct in6_addr *)saddr); | |
1014 | ipv6_addr_copy((struct in6_addr *)x->id.daddr.a6, | |
1015 | (struct in6_addr *)daddr); | |
1016 | break; | |
3ff50b79 | 1017 | } |
2770834c DM |
1018 | |
1019 | x->km.state = XFRM_STATE_ACQ; | |
1020 | x->id.proto = proto; | |
1021 | x->props.family = family; | |
1022 | x->props.mode = mode; | |
1023 | x->props.reqid = reqid; | |
01e67d08 | 1024 | x->lft.hard_add_expires_seconds = sysctl_xfrm_acq_expires; |
2770834c | 1025 | xfrm_state_hold(x); |
01e67d08 | 1026 | x->timer.expires = jiffies + sysctl_xfrm_acq_expires*HZ; |
2770834c | 1027 | add_timer(&x->timer); |
8f126e37 | 1028 | hlist_add_head(&x->bydst, xfrm_state_bydst+h); |
667bbcb6 | 1029 | h = xfrm_src_hash(daddr, saddr, family); |
8f126e37 | 1030 | hlist_add_head(&x->bysrc, xfrm_state_bysrc+h); |
918049f0 DM |
1031 | |
1032 | xfrm_state_num++; | |
1033 | ||
1034 | xfrm_hash_grow_check(x->bydst.next != NULL); | |
2770834c DM |
1035 | } |
1036 | ||
1037 | return x; | |
1038 | } | |
1039 | ||
1da177e4 LT |
1040 | static struct xfrm_state *__xfrm_find_acq_byseq(u32 seq); |
1041 | ||
1042 | int xfrm_state_add(struct xfrm_state *x) | |
1043 | { | |
1da177e4 LT |
1044 | struct xfrm_state *x1; |
1045 | int family; | |
1046 | int err; | |
eb2971b6 | 1047 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
1da177e4 LT |
1048 | |
1049 | family = x->props.family; | |
1da177e4 LT |
1050 | |
1051 | spin_lock_bh(&xfrm_state_lock); | |
1052 | ||
edcd5821 | 1053 | x1 = __xfrm_state_locate(x, use_spi, family); |
1da177e4 LT |
1054 | if (x1) { |
1055 | xfrm_state_put(x1); | |
1056 | x1 = NULL; | |
1057 | err = -EEXIST; | |
1058 | goto out; | |
1059 | } | |
1060 | ||
eb2971b6 | 1061 | if (use_spi && x->km.seq) { |
1da177e4 | 1062 | x1 = __xfrm_find_acq_byseq(x->km.seq); |
75e252d9 JL |
1063 | if (x1 && ((x1->id.proto != x->id.proto) || |
1064 | xfrm_addr_cmp(&x1->id.daddr, &x->id.daddr, family))) { | |
1da177e4 LT |
1065 | xfrm_state_put(x1); |
1066 | x1 = NULL; | |
1067 | } | |
1068 | } | |
1069 | ||
eb2971b6 | 1070 | if (use_spi && !x1) |
2770834c DM |
1071 | x1 = __find_acq_core(family, x->props.mode, x->props.reqid, |
1072 | x->id.proto, | |
1073 | &x->id.daddr, &x->props.saddr, 0); | |
1da177e4 | 1074 | |
c7f5ea3a | 1075 | __xfrm_state_bump_genids(x); |
1da177e4 LT |
1076 | __xfrm_state_insert(x); |
1077 | err = 0; | |
1078 | ||
1079 | out: | |
1080 | spin_unlock_bh(&xfrm_state_lock); | |
1da177e4 LT |
1081 | |
1082 | if (x1) { | |
1083 | xfrm_state_delete(x1); | |
1084 | xfrm_state_put(x1); | |
1085 | } | |
1086 | ||
1087 | return err; | |
1088 | } | |
1089 | EXPORT_SYMBOL(xfrm_state_add); | |
1090 | ||
80c9abaa SS |
1091 | #ifdef CONFIG_XFRM_MIGRATE |
1092 | struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, int *errp) | |
1093 | { | |
1094 | int err = -ENOMEM; | |
1095 | struct xfrm_state *x = xfrm_state_alloc(); | |
1096 | if (!x) | |
1097 | goto error; | |
1098 | ||
1099 | memcpy(&x->id, &orig->id, sizeof(x->id)); | |
1100 | memcpy(&x->sel, &orig->sel, sizeof(x->sel)); | |
1101 | memcpy(&x->lft, &orig->lft, sizeof(x->lft)); | |
1102 | x->props.mode = orig->props.mode; | |
1103 | x->props.replay_window = orig->props.replay_window; | |
1104 | x->props.reqid = orig->props.reqid; | |
1105 | x->props.family = orig->props.family; | |
1106 | x->props.saddr = orig->props.saddr; | |
1107 | ||
1108 | if (orig->aalg) { | |
1109 | x->aalg = xfrm_algo_clone(orig->aalg); | |
1110 | if (!x->aalg) | |
1111 | goto error; | |
1112 | } | |
1113 | x->props.aalgo = orig->props.aalgo; | |
1114 | ||
1115 | if (orig->ealg) { | |
1116 | x->ealg = xfrm_algo_clone(orig->ealg); | |
1117 | if (!x->ealg) | |
1118 | goto error; | |
1119 | } | |
1120 | x->props.ealgo = orig->props.ealgo; | |
1121 | ||
1122 | if (orig->calg) { | |
1123 | x->calg = xfrm_algo_clone(orig->calg); | |
1124 | if (!x->calg) | |
1125 | goto error; | |
1126 | } | |
1127 | x->props.calgo = orig->props.calgo; | |
1128 | ||
a716c119 | 1129 | if (orig->encap) { |
80c9abaa SS |
1130 | x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL); |
1131 | if (!x->encap) | |
1132 | goto error; | |
1133 | } | |
1134 | ||
1135 | if (orig->coaddr) { | |
1136 | x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr), | |
1137 | GFP_KERNEL); | |
1138 | if (!x->coaddr) | |
1139 | goto error; | |
1140 | } | |
1141 | ||
1142 | err = xfrm_init_state(x); | |
1143 | if (err) | |
1144 | goto error; | |
1145 | ||
1146 | x->props.flags = orig->props.flags; | |
1147 | ||
1148 | x->curlft.add_time = orig->curlft.add_time; | |
1149 | x->km.state = orig->km.state; | |
1150 | x->km.seq = orig->km.seq; | |
1151 | ||
1152 | return x; | |
1153 | ||
1154 | error: | |
1155 | if (errp) | |
1156 | *errp = err; | |
1157 | if (x) { | |
1158 | kfree(x->aalg); | |
1159 | kfree(x->ealg); | |
1160 | kfree(x->calg); | |
1161 | kfree(x->encap); | |
1162 | kfree(x->coaddr); | |
1163 | } | |
1164 | kfree(x); | |
1165 | return NULL; | |
1166 | } | |
1167 | EXPORT_SYMBOL(xfrm_state_clone); | |
1168 | ||
1169 | /* xfrm_state_lock is held */ | |
1170 | struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m) | |
1171 | { | |
1172 | unsigned int h; | |
1173 | struct xfrm_state *x; | |
1174 | struct hlist_node *entry; | |
1175 | ||
1176 | if (m->reqid) { | |
1177 | h = xfrm_dst_hash(&m->old_daddr, &m->old_saddr, | |
1178 | m->reqid, m->old_family); | |
1179 | hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) { | |
1180 | if (x->props.mode != m->mode || | |
1181 | x->id.proto != m->proto) | |
1182 | continue; | |
1183 | if (m->reqid && x->props.reqid != m->reqid) | |
1184 | continue; | |
1185 | if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr, | |
1186 | m->old_family) || | |
1187 | xfrm_addr_cmp(&x->props.saddr, &m->old_saddr, | |
1188 | m->old_family)) | |
1189 | continue; | |
1190 | xfrm_state_hold(x); | |
1191 | return x; | |
1192 | } | |
1193 | } else { | |
1194 | h = xfrm_src_hash(&m->old_daddr, &m->old_saddr, | |
1195 | m->old_family); | |
1196 | hlist_for_each_entry(x, entry, xfrm_state_bysrc+h, bysrc) { | |
1197 | if (x->props.mode != m->mode || | |
1198 | x->id.proto != m->proto) | |
1199 | continue; | |
1200 | if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr, | |
1201 | m->old_family) || | |
1202 | xfrm_addr_cmp(&x->props.saddr, &m->old_saddr, | |
1203 | m->old_family)) | |
1204 | continue; | |
1205 | xfrm_state_hold(x); | |
1206 | return x; | |
1207 | } | |
1208 | } | |
1209 | ||
a716c119 | 1210 | return NULL; |
80c9abaa SS |
1211 | } |
1212 | EXPORT_SYMBOL(xfrm_migrate_state_find); | |
1213 | ||
1214 | struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, | |
1215 | struct xfrm_migrate *m) | |
1216 | { | |
1217 | struct xfrm_state *xc; | |
1218 | int err; | |
1219 | ||
1220 | xc = xfrm_state_clone(x, &err); | |
1221 | if (!xc) | |
1222 | return NULL; | |
1223 | ||
1224 | memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr)); | |
1225 | memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr)); | |
1226 | ||
1227 | /* add state */ | |
1228 | if (!xfrm_addr_cmp(&x->id.daddr, &m->new_daddr, m->new_family)) { | |
1229 | /* a care is needed when the destination address of the | |
1230 | state is to be updated as it is a part of triplet */ | |
1231 | xfrm_state_insert(xc); | |
1232 | } else { | |
1233 | if ((err = xfrm_state_add(xc)) < 0) | |
1234 | goto error; | |
1235 | } | |
1236 | ||
1237 | return xc; | |
1238 | error: | |
1239 | kfree(xc); | |
1240 | return NULL; | |
1241 | } | |
1242 | EXPORT_SYMBOL(xfrm_state_migrate); | |
1243 | #endif | |
1244 | ||
1da177e4 LT |
1245 | int xfrm_state_update(struct xfrm_state *x) |
1246 | { | |
1da177e4 LT |
1247 | struct xfrm_state *x1; |
1248 | int err; | |
eb2971b6 | 1249 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
1da177e4 | 1250 | |
1da177e4 | 1251 | spin_lock_bh(&xfrm_state_lock); |
edcd5821 | 1252 | x1 = __xfrm_state_locate(x, use_spi, x->props.family); |
1da177e4 LT |
1253 | |
1254 | err = -ESRCH; | |
1255 | if (!x1) | |
1256 | goto out; | |
1257 | ||
1258 | if (xfrm_state_kern(x1)) { | |
1259 | xfrm_state_put(x1); | |
1260 | err = -EEXIST; | |
1261 | goto out; | |
1262 | } | |
1263 | ||
1264 | if (x1->km.state == XFRM_STATE_ACQ) { | |
1265 | __xfrm_state_insert(x); | |
1266 | x = NULL; | |
1267 | } | |
1268 | err = 0; | |
1269 | ||
1270 | out: | |
1271 | spin_unlock_bh(&xfrm_state_lock); | |
1da177e4 LT |
1272 | |
1273 | if (err) | |
1274 | return err; | |
1275 | ||
1276 | if (!x) { | |
1277 | xfrm_state_delete(x1); | |
1278 | xfrm_state_put(x1); | |
1279 | return 0; | |
1280 | } | |
1281 | ||
1282 | err = -EINVAL; | |
1283 | spin_lock_bh(&x1->lock); | |
1284 | if (likely(x1->km.state == XFRM_STATE_VALID)) { | |
1285 | if (x->encap && x1->encap) | |
1286 | memcpy(x1->encap, x->encap, sizeof(*x1->encap)); | |
060f02a3 NT |
1287 | if (x->coaddr && x1->coaddr) { |
1288 | memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr)); | |
1289 | } | |
1290 | if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel))) | |
1291 | memcpy(&x1->sel, &x->sel, sizeof(x1->sel)); | |
1da177e4 LT |
1292 | memcpy(&x1->lft, &x->lft, sizeof(x1->lft)); |
1293 | x1->km.dying = 0; | |
1294 | ||
a47f0ce0 | 1295 | mod_timer(&x1->timer, jiffies + HZ); |
1da177e4 LT |
1296 | if (x1->curlft.use_time) |
1297 | xfrm_state_check_expire(x1); | |
1298 | ||
1299 | err = 0; | |
1300 | } | |
1301 | spin_unlock_bh(&x1->lock); | |
1302 | ||
1303 | xfrm_state_put(x1); | |
1304 | ||
1305 | return err; | |
1306 | } | |
1307 | EXPORT_SYMBOL(xfrm_state_update); | |
1308 | ||
1309 | int xfrm_state_check_expire(struct xfrm_state *x) | |
1310 | { | |
1311 | if (!x->curlft.use_time) | |
9d729f72 | 1312 | x->curlft.use_time = get_seconds(); |
1da177e4 LT |
1313 | |
1314 | if (x->km.state != XFRM_STATE_VALID) | |
1315 | return -EINVAL; | |
1316 | ||
1317 | if (x->curlft.bytes >= x->lft.hard_byte_limit || | |
1318 | x->curlft.packets >= x->lft.hard_packet_limit) { | |
4666faab | 1319 | x->km.state = XFRM_STATE_EXPIRED; |
a47f0ce0 | 1320 | mod_timer(&x->timer, jiffies); |
1da177e4 LT |
1321 | return -EINVAL; |
1322 | } | |
1323 | ||
1324 | if (!x->km.dying && | |
1325 | (x->curlft.bytes >= x->lft.soft_byte_limit || | |
4666faab HX |
1326 | x->curlft.packets >= x->lft.soft_packet_limit)) { |
1327 | x->km.dying = 1; | |
53bc6b4d | 1328 | km_state_expired(x, 0, 0); |
4666faab | 1329 | } |
1da177e4 LT |
1330 | return 0; |
1331 | } | |
1332 | EXPORT_SYMBOL(xfrm_state_check_expire); | |
1333 | ||
1da177e4 | 1334 | struct xfrm_state * |
a94cfd19 | 1335 | xfrm_state_lookup(xfrm_address_t *daddr, __be32 spi, u8 proto, |
1da177e4 LT |
1336 | unsigned short family) |
1337 | { | |
1338 | struct xfrm_state *x; | |
1da177e4 LT |
1339 | |
1340 | spin_lock_bh(&xfrm_state_lock); | |
edcd5821 | 1341 | x = __xfrm_state_lookup(daddr, spi, proto, family); |
1da177e4 | 1342 | spin_unlock_bh(&xfrm_state_lock); |
1da177e4 LT |
1343 | return x; |
1344 | } | |
1345 | EXPORT_SYMBOL(xfrm_state_lookup); | |
1346 | ||
1347 | struct xfrm_state * | |
eb2971b6 MN |
1348 | xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, |
1349 | u8 proto, unsigned short family) | |
1350 | { | |
1351 | struct xfrm_state *x; | |
eb2971b6 MN |
1352 | |
1353 | spin_lock_bh(&xfrm_state_lock); | |
edcd5821 | 1354 | x = __xfrm_state_lookup_byaddr(daddr, saddr, proto, family); |
eb2971b6 | 1355 | spin_unlock_bh(&xfrm_state_lock); |
eb2971b6 MN |
1356 | return x; |
1357 | } | |
1358 | EXPORT_SYMBOL(xfrm_state_lookup_byaddr); | |
1359 | ||
1360 | struct xfrm_state * | |
a716c119 YH |
1361 | xfrm_find_acq(u8 mode, u32 reqid, u8 proto, |
1362 | xfrm_address_t *daddr, xfrm_address_t *saddr, | |
1da177e4 LT |
1363 | int create, unsigned short family) |
1364 | { | |
1365 | struct xfrm_state *x; | |
1da177e4 LT |
1366 | |
1367 | spin_lock_bh(&xfrm_state_lock); | |
2770834c | 1368 | x = __find_acq_core(family, mode, reqid, proto, daddr, saddr, create); |
1da177e4 | 1369 | spin_unlock_bh(&xfrm_state_lock); |
2770834c | 1370 | |
1da177e4 LT |
1371 | return x; |
1372 | } | |
1373 | EXPORT_SYMBOL(xfrm_find_acq); | |
1374 | ||
41a49cc3 MN |
1375 | #ifdef CONFIG_XFRM_SUB_POLICY |
1376 | int | |
1377 | xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, | |
1378 | unsigned short family) | |
1379 | { | |
1380 | int err = 0; | |
1381 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
1382 | if (!afinfo) | |
1383 | return -EAFNOSUPPORT; | |
1384 | ||
1385 | spin_lock_bh(&xfrm_state_lock); | |
1386 | if (afinfo->tmpl_sort) | |
1387 | err = afinfo->tmpl_sort(dst, src, n); | |
1388 | spin_unlock_bh(&xfrm_state_lock); | |
1389 | xfrm_state_put_afinfo(afinfo); | |
1390 | return err; | |
1391 | } | |
1392 | EXPORT_SYMBOL(xfrm_tmpl_sort); | |
1393 | ||
1394 | int | |
1395 | xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, | |
1396 | unsigned short family) | |
1397 | { | |
1398 | int err = 0; | |
1399 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
1400 | if (!afinfo) | |
1401 | return -EAFNOSUPPORT; | |
1402 | ||
1403 | spin_lock_bh(&xfrm_state_lock); | |
1404 | if (afinfo->state_sort) | |
1405 | err = afinfo->state_sort(dst, src, n); | |
1406 | spin_unlock_bh(&xfrm_state_lock); | |
1407 | xfrm_state_put_afinfo(afinfo); | |
1408 | return err; | |
1409 | } | |
1410 | EXPORT_SYMBOL(xfrm_state_sort); | |
1411 | #endif | |
1412 | ||
1da177e4 LT |
1413 | /* Silly enough, but I'm lazy to build resolution list */ |
1414 | ||
1415 | static struct xfrm_state *__xfrm_find_acq_byseq(u32 seq) | |
1416 | { | |
1417 | int i; | |
1da177e4 | 1418 | |
f034b5d4 | 1419 | for (i = 0; i <= xfrm_state_hmask; i++) { |
8f126e37 DM |
1420 | struct hlist_node *entry; |
1421 | struct xfrm_state *x; | |
1422 | ||
1423 | hlist_for_each_entry(x, entry, xfrm_state_bydst+i, bydst) { | |
1424 | if (x->km.seq == seq && | |
1425 | x->km.state == XFRM_STATE_ACQ) { | |
1da177e4 LT |
1426 | xfrm_state_hold(x); |
1427 | return x; | |
1428 | } | |
1429 | } | |
1430 | } | |
1431 | return NULL; | |
1432 | } | |
1433 | ||
1434 | struct xfrm_state *xfrm_find_acq_byseq(u32 seq) | |
1435 | { | |
1436 | struct xfrm_state *x; | |
1437 | ||
1438 | spin_lock_bh(&xfrm_state_lock); | |
1439 | x = __xfrm_find_acq_byseq(seq); | |
1440 | spin_unlock_bh(&xfrm_state_lock); | |
1441 | return x; | |
1442 | } | |
1443 | EXPORT_SYMBOL(xfrm_find_acq_byseq); | |
1444 | ||
1445 | u32 xfrm_get_acqseq(void) | |
1446 | { | |
1447 | u32 res; | |
1448 | static u32 acqseq; | |
1449 | static DEFINE_SPINLOCK(acqseq_lock); | |
1450 | ||
1451 | spin_lock_bh(&acqseq_lock); | |
1452 | res = (++acqseq ? : ++acqseq); | |
1453 | spin_unlock_bh(&acqseq_lock); | |
1454 | return res; | |
1455 | } | |
1456 | EXPORT_SYMBOL(xfrm_get_acqseq); | |
1457 | ||
658b219e | 1458 | int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high) |
1da177e4 | 1459 | { |
f034b5d4 | 1460 | unsigned int h; |
1da177e4 | 1461 | struct xfrm_state *x0; |
658b219e HX |
1462 | int err = -ENOENT; |
1463 | __be32 minspi = htonl(low); | |
1464 | __be32 maxspi = htonl(high); | |
1da177e4 | 1465 | |
658b219e HX |
1466 | spin_lock_bh(&x->lock); |
1467 | if (x->km.state == XFRM_STATE_DEAD) | |
1468 | goto unlock; | |
1469 | ||
1470 | err = 0; | |
1da177e4 | 1471 | if (x->id.spi) |
658b219e HX |
1472 | goto unlock; |
1473 | ||
1474 | err = -ENOENT; | |
1da177e4 LT |
1475 | |
1476 | if (minspi == maxspi) { | |
1477 | x0 = xfrm_state_lookup(&x->id.daddr, minspi, x->id.proto, x->props.family); | |
1478 | if (x0) { | |
1479 | xfrm_state_put(x0); | |
658b219e | 1480 | goto unlock; |
1da177e4 LT |
1481 | } |
1482 | x->id.spi = minspi; | |
1483 | } else { | |
1484 | u32 spi = 0; | |
26977b4e AV |
1485 | for (h=0; h<high-low+1; h++) { |
1486 | spi = low + net_random()%(high-low+1); | |
1da177e4 LT |
1487 | x0 = xfrm_state_lookup(&x->id.daddr, htonl(spi), x->id.proto, x->props.family); |
1488 | if (x0 == NULL) { | |
1489 | x->id.spi = htonl(spi); | |
1490 | break; | |
1491 | } | |
1492 | xfrm_state_put(x0); | |
1493 | } | |
1494 | } | |
1495 | if (x->id.spi) { | |
1496 | spin_lock_bh(&xfrm_state_lock); | |
1497 | h = xfrm_spi_hash(&x->id.daddr, x->id.spi, x->id.proto, x->props.family); | |
8f126e37 | 1498 | hlist_add_head(&x->byspi, xfrm_state_byspi+h); |
1da177e4 | 1499 | spin_unlock_bh(&xfrm_state_lock); |
658b219e HX |
1500 | |
1501 | err = 0; | |
1da177e4 | 1502 | } |
658b219e HX |
1503 | |
1504 | unlock: | |
1505 | spin_unlock_bh(&x->lock); | |
1506 | ||
1507 | return err; | |
1da177e4 LT |
1508 | } |
1509 | EXPORT_SYMBOL(xfrm_alloc_spi); | |
1510 | ||
1511 | int xfrm_state_walk(u8 proto, int (*func)(struct xfrm_state *, int, void*), | |
1512 | void *data) | |
1513 | { | |
1514 | int i; | |
94b9bb54 | 1515 | struct xfrm_state *x, *last = NULL; |
8f126e37 | 1516 | struct hlist_node *entry; |
1da177e4 LT |
1517 | int count = 0; |
1518 | int err = 0; | |
1519 | ||
1520 | spin_lock_bh(&xfrm_state_lock); | |
f034b5d4 | 1521 | for (i = 0; i <= xfrm_state_hmask; i++) { |
8f126e37 | 1522 | hlist_for_each_entry(x, entry, xfrm_state_bydst+i, bydst) { |
94b9bb54 JHS |
1523 | if (!xfrm_id_proto_match(x->id.proto, proto)) |
1524 | continue; | |
1525 | if (last) { | |
1526 | err = func(last, count, data); | |
1527 | if (err) | |
1528 | goto out; | |
1529 | } | |
1530 | last = x; | |
1531 | count++; | |
1da177e4 LT |
1532 | } |
1533 | } | |
1534 | if (count == 0) { | |
1535 | err = -ENOENT; | |
1536 | goto out; | |
1537 | } | |
94b9bb54 | 1538 | err = func(last, 0, data); |
1da177e4 LT |
1539 | out: |
1540 | spin_unlock_bh(&xfrm_state_lock); | |
1541 | return err; | |
1542 | } | |
1543 | EXPORT_SYMBOL(xfrm_state_walk); | |
1544 | ||
f8cd5488 JHS |
1545 | |
1546 | void xfrm_replay_notify(struct xfrm_state *x, int event) | |
1547 | { | |
1548 | struct km_event c; | |
1549 | /* we send notify messages in case | |
1550 | * 1. we updated on of the sequence numbers, and the seqno difference | |
1551 | * is at least x->replay_maxdiff, in this case we also update the | |
1552 | * timeout of our timer function | |
1553 | * 2. if x->replay_maxage has elapsed since last update, | |
1554 | * and there were changes | |
1555 | * | |
1556 | * The state structure must be locked! | |
1557 | */ | |
1558 | ||
1559 | switch (event) { | |
1560 | case XFRM_REPLAY_UPDATE: | |
1561 | if (x->replay_maxdiff && | |
1562 | (x->replay.seq - x->preplay.seq < x->replay_maxdiff) && | |
2717096a JHS |
1563 | (x->replay.oseq - x->preplay.oseq < x->replay_maxdiff)) { |
1564 | if (x->xflags & XFRM_TIME_DEFER) | |
1565 | event = XFRM_REPLAY_TIMEOUT; | |
1566 | else | |
1567 | return; | |
1568 | } | |
f8cd5488 JHS |
1569 | |
1570 | break; | |
1571 | ||
1572 | case XFRM_REPLAY_TIMEOUT: | |
1573 | if ((x->replay.seq == x->preplay.seq) && | |
1574 | (x->replay.bitmap == x->preplay.bitmap) && | |
2717096a JHS |
1575 | (x->replay.oseq == x->preplay.oseq)) { |
1576 | x->xflags |= XFRM_TIME_DEFER; | |
f8cd5488 | 1577 | return; |
2717096a | 1578 | } |
f8cd5488 JHS |
1579 | |
1580 | break; | |
1581 | } | |
1582 | ||
1583 | memcpy(&x->preplay, &x->replay, sizeof(struct xfrm_replay_state)); | |
1584 | c.event = XFRM_MSG_NEWAE; | |
1585 | c.data.aevent = event; | |
1586 | km_state_notify(x, &c); | |
1587 | ||
f8cd5488 | 1588 | if (x->replay_maxage && |
a47f0ce0 | 1589 | !mod_timer(&x->rtimer, jiffies + x->replay_maxage)) |
2717096a | 1590 | x->xflags &= ~XFRM_TIME_DEFER; |
f8cd5488 JHS |
1591 | } |
1592 | ||
1593 | static void xfrm_replay_timer_handler(unsigned long data) | |
1594 | { | |
1595 | struct xfrm_state *x = (struct xfrm_state*)data; | |
1596 | ||
1597 | spin_lock(&x->lock); | |
1598 | ||
2717096a JHS |
1599 | if (x->km.state == XFRM_STATE_VALID) { |
1600 | if (xfrm_aevent_is_on()) | |
1601 | xfrm_replay_notify(x, XFRM_REPLAY_TIMEOUT); | |
1602 | else | |
1603 | x->xflags |= XFRM_TIME_DEFER; | |
1604 | } | |
f8cd5488 JHS |
1605 | |
1606 | spin_unlock(&x->lock); | |
1607 | } | |
1608 | ||
a252cc23 | 1609 | int xfrm_replay_check(struct xfrm_state *x, __be32 net_seq) |
1da177e4 LT |
1610 | { |
1611 | u32 diff; | |
a252cc23 | 1612 | u32 seq = ntohl(net_seq); |
1da177e4 LT |
1613 | |
1614 | if (unlikely(seq == 0)) | |
1615 | return -EINVAL; | |
1616 | ||
1617 | if (likely(seq > x->replay.seq)) | |
1618 | return 0; | |
1619 | ||
1620 | diff = x->replay.seq - seq; | |
4c4d51a7 HX |
1621 | if (diff >= min_t(unsigned int, x->props.replay_window, |
1622 | sizeof(x->replay.bitmap) * 8)) { | |
1da177e4 LT |
1623 | x->stats.replay_window++; |
1624 | return -EINVAL; | |
1625 | } | |
1626 | ||
1627 | if (x->replay.bitmap & (1U << diff)) { | |
1628 | x->stats.replay++; | |
1629 | return -EINVAL; | |
1630 | } | |
1631 | return 0; | |
1632 | } | |
1633 | EXPORT_SYMBOL(xfrm_replay_check); | |
1634 | ||
61f4627b | 1635 | void xfrm_replay_advance(struct xfrm_state *x, __be32 net_seq) |
1da177e4 LT |
1636 | { |
1637 | u32 diff; | |
61f4627b | 1638 | u32 seq = ntohl(net_seq); |
1da177e4 LT |
1639 | |
1640 | if (seq > x->replay.seq) { | |
1641 | diff = seq - x->replay.seq; | |
1642 | if (diff < x->props.replay_window) | |
1643 | x->replay.bitmap = ((x->replay.bitmap) << diff) | 1; | |
1644 | else | |
1645 | x->replay.bitmap = 1; | |
1646 | x->replay.seq = seq; | |
1647 | } else { | |
1648 | diff = x->replay.seq - seq; | |
1649 | x->replay.bitmap |= (1U << diff); | |
1650 | } | |
f8cd5488 JHS |
1651 | |
1652 | if (xfrm_aevent_is_on()) | |
1653 | xfrm_replay_notify(x, XFRM_REPLAY_UPDATE); | |
1da177e4 LT |
1654 | } |
1655 | EXPORT_SYMBOL(xfrm_replay_advance); | |
1656 | ||
1657 | static struct list_head xfrm_km_list = LIST_HEAD_INIT(xfrm_km_list); | |
1658 | static DEFINE_RWLOCK(xfrm_km_lock); | |
1659 | ||
26b15dad | 1660 | void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) |
1da177e4 LT |
1661 | { |
1662 | struct xfrm_mgr *km; | |
1663 | ||
26b15dad JHS |
1664 | read_lock(&xfrm_km_lock); |
1665 | list_for_each_entry(km, &xfrm_km_list, list) | |
1666 | if (km->notify_policy) | |
1667 | km->notify_policy(xp, dir, c); | |
1668 | read_unlock(&xfrm_km_lock); | |
1669 | } | |
1da177e4 | 1670 | |
26b15dad JHS |
1671 | void km_state_notify(struct xfrm_state *x, struct km_event *c) |
1672 | { | |
1673 | struct xfrm_mgr *km; | |
1da177e4 LT |
1674 | read_lock(&xfrm_km_lock); |
1675 | list_for_each_entry(km, &xfrm_km_list, list) | |
26b15dad JHS |
1676 | if (km->notify) |
1677 | km->notify(x, c); | |
1da177e4 | 1678 | read_unlock(&xfrm_km_lock); |
26b15dad JHS |
1679 | } |
1680 | ||
1681 | EXPORT_SYMBOL(km_policy_notify); | |
1682 | EXPORT_SYMBOL(km_state_notify); | |
1683 | ||
53bc6b4d | 1684 | void km_state_expired(struct xfrm_state *x, int hard, u32 pid) |
26b15dad JHS |
1685 | { |
1686 | struct km_event c; | |
1687 | ||
bf08867f | 1688 | c.data.hard = hard; |
53bc6b4d | 1689 | c.pid = pid; |
f60f6b8f | 1690 | c.event = XFRM_MSG_EXPIRE; |
26b15dad | 1691 | km_state_notify(x, &c); |
1da177e4 LT |
1692 | |
1693 | if (hard) | |
1694 | wake_up(&km_waitq); | |
1695 | } | |
1696 | ||
53bc6b4d | 1697 | EXPORT_SYMBOL(km_state_expired); |
26b15dad JHS |
1698 | /* |
1699 | * We send to all registered managers regardless of failure | |
1700 | * We are happy with one success | |
1701 | */ | |
980ebd25 | 1702 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol) |
1da177e4 | 1703 | { |
26b15dad | 1704 | int err = -EINVAL, acqret; |
1da177e4 LT |
1705 | struct xfrm_mgr *km; |
1706 | ||
1707 | read_lock(&xfrm_km_lock); | |
1708 | list_for_each_entry(km, &xfrm_km_list, list) { | |
26b15dad JHS |
1709 | acqret = km->acquire(x, t, pol, XFRM_POLICY_OUT); |
1710 | if (!acqret) | |
1711 | err = acqret; | |
1da177e4 LT |
1712 | } |
1713 | read_unlock(&xfrm_km_lock); | |
1714 | return err; | |
1715 | } | |
980ebd25 | 1716 | EXPORT_SYMBOL(km_query); |
1da177e4 | 1717 | |
5d36b180 | 1718 | int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) |
1da177e4 LT |
1719 | { |
1720 | int err = -EINVAL; | |
1721 | struct xfrm_mgr *km; | |
1722 | ||
1723 | read_lock(&xfrm_km_lock); | |
1724 | list_for_each_entry(km, &xfrm_km_list, list) { | |
1725 | if (km->new_mapping) | |
1726 | err = km->new_mapping(x, ipaddr, sport); | |
1727 | if (!err) | |
1728 | break; | |
1729 | } | |
1730 | read_unlock(&xfrm_km_lock); | |
1731 | return err; | |
1732 | } | |
1733 | EXPORT_SYMBOL(km_new_mapping); | |
1734 | ||
6c5c8ca7 | 1735 | void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid) |
1da177e4 | 1736 | { |
26b15dad | 1737 | struct km_event c; |
1da177e4 | 1738 | |
bf08867f | 1739 | c.data.hard = hard; |
6c5c8ca7 | 1740 | c.pid = pid; |
f60f6b8f | 1741 | c.event = XFRM_MSG_POLEXPIRE; |
26b15dad | 1742 | km_policy_notify(pol, dir, &c); |
1da177e4 LT |
1743 | |
1744 | if (hard) | |
1745 | wake_up(&km_waitq); | |
1746 | } | |
a70fcb0b | 1747 | EXPORT_SYMBOL(km_policy_expired); |
1da177e4 | 1748 | |
2d60abc2 | 1749 | #ifdef CONFIG_XFRM_MIGRATE |
80c9abaa SS |
1750 | int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type, |
1751 | struct xfrm_migrate *m, int num_migrate) | |
1752 | { | |
1753 | int err = -EINVAL; | |
1754 | int ret; | |
1755 | struct xfrm_mgr *km; | |
1756 | ||
1757 | read_lock(&xfrm_km_lock); | |
1758 | list_for_each_entry(km, &xfrm_km_list, list) { | |
1759 | if (km->migrate) { | |
1760 | ret = km->migrate(sel, dir, type, m, num_migrate); | |
1761 | if (!ret) | |
1762 | err = ret; | |
1763 | } | |
1764 | } | |
1765 | read_unlock(&xfrm_km_lock); | |
1766 | return err; | |
1767 | } | |
1768 | EXPORT_SYMBOL(km_migrate); | |
2d60abc2 | 1769 | #endif |
80c9abaa | 1770 | |
97a64b45 MN |
1771 | int km_report(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr) |
1772 | { | |
1773 | int err = -EINVAL; | |
1774 | int ret; | |
1775 | struct xfrm_mgr *km; | |
1776 | ||
1777 | read_lock(&xfrm_km_lock); | |
1778 | list_for_each_entry(km, &xfrm_km_list, list) { | |
1779 | if (km->report) { | |
1780 | ret = km->report(proto, sel, addr); | |
1781 | if (!ret) | |
1782 | err = ret; | |
1783 | } | |
1784 | } | |
1785 | read_unlock(&xfrm_km_lock); | |
1786 | return err; | |
1787 | } | |
1788 | EXPORT_SYMBOL(km_report); | |
1789 | ||
1da177e4 LT |
1790 | int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) |
1791 | { | |
1792 | int err; | |
1793 | u8 *data; | |
1794 | struct xfrm_mgr *km; | |
1795 | struct xfrm_policy *pol = NULL; | |
1796 | ||
1797 | if (optlen <= 0 || optlen > PAGE_SIZE) | |
1798 | return -EMSGSIZE; | |
1799 | ||
1800 | data = kmalloc(optlen, GFP_KERNEL); | |
1801 | if (!data) | |
1802 | return -ENOMEM; | |
1803 | ||
1804 | err = -EFAULT; | |
1805 | if (copy_from_user(data, optval, optlen)) | |
1806 | goto out; | |
1807 | ||
1808 | err = -EINVAL; | |
1809 | read_lock(&xfrm_km_lock); | |
1810 | list_for_each_entry(km, &xfrm_km_list, list) { | |
cb969f07 | 1811 | pol = km->compile_policy(sk, optname, data, |
1da177e4 LT |
1812 | optlen, &err); |
1813 | if (err >= 0) | |
1814 | break; | |
1815 | } | |
1816 | read_unlock(&xfrm_km_lock); | |
1817 | ||
1818 | if (err >= 0) { | |
1819 | xfrm_sk_policy_insert(sk, err, pol); | |
1820 | xfrm_pol_put(pol); | |
1821 | err = 0; | |
1822 | } | |
1823 | ||
1824 | out: | |
1825 | kfree(data); | |
1826 | return err; | |
1827 | } | |
1828 | EXPORT_SYMBOL(xfrm_user_policy); | |
1829 | ||
1830 | int xfrm_register_km(struct xfrm_mgr *km) | |
1831 | { | |
1832 | write_lock_bh(&xfrm_km_lock); | |
1833 | list_add_tail(&km->list, &xfrm_km_list); | |
1834 | write_unlock_bh(&xfrm_km_lock); | |
1835 | return 0; | |
1836 | } | |
1837 | EXPORT_SYMBOL(xfrm_register_km); | |
1838 | ||
1839 | int xfrm_unregister_km(struct xfrm_mgr *km) | |
1840 | { | |
1841 | write_lock_bh(&xfrm_km_lock); | |
1842 | list_del(&km->list); | |
1843 | write_unlock_bh(&xfrm_km_lock); | |
1844 | return 0; | |
1845 | } | |
1846 | EXPORT_SYMBOL(xfrm_unregister_km); | |
1847 | ||
1848 | int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo) | |
1849 | { | |
1850 | int err = 0; | |
1851 | if (unlikely(afinfo == NULL)) | |
1852 | return -EINVAL; | |
1853 | if (unlikely(afinfo->family >= NPROTO)) | |
1854 | return -EAFNOSUPPORT; | |
f3111502 | 1855 | write_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1856 | if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL)) |
1857 | err = -ENOBUFS; | |
edcd5821 | 1858 | else |
1da177e4 | 1859 | xfrm_state_afinfo[afinfo->family] = afinfo; |
f3111502 | 1860 | write_unlock_bh(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1861 | return err; |
1862 | } | |
1863 | EXPORT_SYMBOL(xfrm_state_register_afinfo); | |
1864 | ||
1865 | int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo) | |
1866 | { | |
1867 | int err = 0; | |
1868 | if (unlikely(afinfo == NULL)) | |
1869 | return -EINVAL; | |
1870 | if (unlikely(afinfo->family >= NPROTO)) | |
1871 | return -EAFNOSUPPORT; | |
f3111502 | 1872 | write_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1873 | if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) { |
1874 | if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo)) | |
1875 | err = -EINVAL; | |
edcd5821 | 1876 | else |
1da177e4 | 1877 | xfrm_state_afinfo[afinfo->family] = NULL; |
1da177e4 | 1878 | } |
f3111502 | 1879 | write_unlock_bh(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1880 | return err; |
1881 | } | |
1882 | EXPORT_SYMBOL(xfrm_state_unregister_afinfo); | |
1883 | ||
17c2a42a | 1884 | static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family) |
1da177e4 LT |
1885 | { |
1886 | struct xfrm_state_afinfo *afinfo; | |
1887 | if (unlikely(family >= NPROTO)) | |
1888 | return NULL; | |
1889 | read_lock(&xfrm_state_afinfo_lock); | |
1890 | afinfo = xfrm_state_afinfo[family]; | |
546be240 HX |
1891 | if (unlikely(!afinfo)) |
1892 | read_unlock(&xfrm_state_afinfo_lock); | |
1da177e4 LT |
1893 | return afinfo; |
1894 | } | |
1895 | ||
17c2a42a | 1896 | static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo) |
1da177e4 | 1897 | { |
546be240 | 1898 | read_unlock(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1899 | } |
1900 | ||
1901 | /* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */ | |
1902 | void xfrm_state_delete_tunnel(struct xfrm_state *x) | |
1903 | { | |
1904 | if (x->tunnel) { | |
1905 | struct xfrm_state *t = x->tunnel; | |
1906 | ||
1907 | if (atomic_read(&t->tunnel_users) == 2) | |
1908 | xfrm_state_delete(t); | |
1909 | atomic_dec(&t->tunnel_users); | |
1910 | xfrm_state_put(t); | |
1911 | x->tunnel = NULL; | |
1912 | } | |
1913 | } | |
1914 | EXPORT_SYMBOL(xfrm_state_delete_tunnel); | |
1915 | ||
1916 | int xfrm_state_mtu(struct xfrm_state *x, int mtu) | |
1917 | { | |
c5c25238 | 1918 | int res; |
1da177e4 | 1919 | |
c5c25238 PM |
1920 | spin_lock_bh(&x->lock); |
1921 | if (x->km.state == XFRM_STATE_VALID && | |
1922 | x->type && x->type->get_mtu) | |
1923 | res = x->type->get_mtu(x, mtu); | |
1924 | else | |
28121617 | 1925 | res = mtu - x->props.header_len; |
c5c25238 | 1926 | spin_unlock_bh(&x->lock); |
1da177e4 LT |
1927 | return res; |
1928 | } | |
1929 | ||
72cb6962 HX |
1930 | int xfrm_init_state(struct xfrm_state *x) |
1931 | { | |
d094cd83 HX |
1932 | struct xfrm_state_afinfo *afinfo; |
1933 | int family = x->props.family; | |
72cb6962 HX |
1934 | int err; |
1935 | ||
d094cd83 HX |
1936 | err = -EAFNOSUPPORT; |
1937 | afinfo = xfrm_state_get_afinfo(family); | |
1938 | if (!afinfo) | |
1939 | goto error; | |
1940 | ||
1941 | err = 0; | |
1942 | if (afinfo->init_flags) | |
1943 | err = afinfo->init_flags(x); | |
1944 | ||
1945 | xfrm_state_put_afinfo(afinfo); | |
1946 | ||
1947 | if (err) | |
1948 | goto error; | |
1949 | ||
1950 | err = -EPROTONOSUPPORT; | |
13996378 HX |
1951 | x->inner_mode = xfrm_get_mode(x->props.mode, x->sel.family); |
1952 | if (x->inner_mode == NULL) | |
1953 | goto error; | |
1954 | ||
1955 | if (!(x->inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) && | |
1956 | family != x->sel.family) | |
1957 | goto error; | |
1958 | ||
d094cd83 | 1959 | x->type = xfrm_get_type(x->id.proto, family); |
72cb6962 HX |
1960 | if (x->type == NULL) |
1961 | goto error; | |
1962 | ||
1963 | err = x->type->init_state(x); | |
1964 | if (err) | |
1965 | goto error; | |
1966 | ||
13996378 HX |
1967 | x->outer_mode = xfrm_get_mode(x->props.mode, family); |
1968 | if (x->outer_mode == NULL) | |
b59f45d0 HX |
1969 | goto error; |
1970 | ||
72cb6962 HX |
1971 | x->km.state = XFRM_STATE_VALID; |
1972 | ||
1973 | error: | |
1974 | return err; | |
1975 | } | |
1976 | ||
1977 | EXPORT_SYMBOL(xfrm_init_state); | |
a716c119 | 1978 | |
1da177e4 LT |
1979 | void __init xfrm_state_init(void) |
1980 | { | |
f034b5d4 DM |
1981 | unsigned int sz; |
1982 | ||
1983 | sz = sizeof(struct hlist_head) * 8; | |
1984 | ||
44e36b42 DM |
1985 | xfrm_state_bydst = xfrm_hash_alloc(sz); |
1986 | xfrm_state_bysrc = xfrm_hash_alloc(sz); | |
1987 | xfrm_state_byspi = xfrm_hash_alloc(sz); | |
f034b5d4 DM |
1988 | if (!xfrm_state_bydst || !xfrm_state_bysrc || !xfrm_state_byspi) |
1989 | panic("XFRM: Cannot allocate bydst/bysrc/byspi hashes."); | |
1990 | xfrm_state_hmask = ((sz / sizeof(struct hlist_head)) - 1); | |
1da177e4 | 1991 | |
c4028958 | 1992 | INIT_WORK(&xfrm_state_gc_work, xfrm_state_gc_task); |
1da177e4 LT |
1993 | } |
1994 | ||
ab5f5e8b JL |
1995 | #ifdef CONFIG_AUDITSYSCALL |
1996 | static inline void xfrm_audit_common_stateinfo(struct xfrm_state *x, | |
1997 | struct audit_buffer *audit_buf) | |
1998 | { | |
1999 | if (x->security) | |
2000 | audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s", | |
2001 | x->security->ctx_alg, x->security->ctx_doi, | |
2002 | x->security->ctx_str); | |
2003 | ||
2004 | switch(x->props.family) { | |
2005 | case AF_INET: | |
2006 | audit_log_format(audit_buf, " src=%u.%u.%u.%u dst=%u.%u.%u.%u", | |
2007 | NIPQUAD(x->props.saddr.a4), | |
2008 | NIPQUAD(x->id.daddr.a4)); | |
2009 | break; | |
2010 | case AF_INET6: | |
2011 | { | |
2012 | struct in6_addr saddr6, daddr6; | |
2013 | ||
2014 | memcpy(&saddr6, x->props.saddr.a6, | |
2015 | sizeof(struct in6_addr)); | |
2016 | memcpy(&daddr6, x->id.daddr.a6, | |
2017 | sizeof(struct in6_addr)); | |
2018 | audit_log_format(audit_buf, | |
2019 | " src=" NIP6_FMT " dst=" NIP6_FMT, | |
2020 | NIP6(saddr6), NIP6(daddr6)); | |
2021 | } | |
2022 | break; | |
2023 | } | |
2024 | } | |
2025 | ||
2026 | void | |
2027 | xfrm_audit_state_add(struct xfrm_state *x, int result, u32 auid, u32 sid) | |
2028 | { | |
2029 | struct audit_buffer *audit_buf; | |
9ab4c954 | 2030 | u32 spi; |
ab5f5e8b JL |
2031 | extern int audit_enabled; |
2032 | ||
2033 | if (audit_enabled == 0) | |
2034 | return; | |
5951cab1 | 2035 | audit_buf = xfrm_audit_start(auid, sid); |
ab5f5e8b JL |
2036 | if (audit_buf == NULL) |
2037 | return; | |
2038 | audit_log_format(audit_buf, " op=SAD-add res=%u",result); | |
2039 | xfrm_audit_common_stateinfo(x, audit_buf); | |
9ab4c954 PM |
2040 | spi = ntohl(x->id.spi); |
2041 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
ab5f5e8b JL |
2042 | audit_log_end(audit_buf); |
2043 | } | |
2044 | EXPORT_SYMBOL_GPL(xfrm_audit_state_add); | |
2045 | ||
2046 | void | |
2047 | xfrm_audit_state_delete(struct xfrm_state *x, int result, u32 auid, u32 sid) | |
2048 | { | |
2049 | struct audit_buffer *audit_buf; | |
9ab4c954 | 2050 | u32 spi; |
ab5f5e8b JL |
2051 | extern int audit_enabled; |
2052 | ||
2053 | if (audit_enabled == 0) | |
2054 | return; | |
5951cab1 | 2055 | audit_buf = xfrm_audit_start(auid, sid); |
ab5f5e8b JL |
2056 | if (audit_buf == NULL) |
2057 | return; | |
2058 | audit_log_format(audit_buf, " op=SAD-delete res=%u",result); | |
2059 | xfrm_audit_common_stateinfo(x, audit_buf); | |
9ab4c954 PM |
2060 | spi = ntohl(x->id.spi); |
2061 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
ab5f5e8b JL |
2062 | audit_log_end(audit_buf); |
2063 | } | |
2064 | EXPORT_SYMBOL_GPL(xfrm_audit_state_delete); | |
2065 | #endif /* CONFIG_AUDITSYSCALL */ |