Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * xfrm_state.c | |
3 | * | |
4 | * Changes: | |
5 | * Mitsuru KANDA @USAGI | |
6 | * Kazunori MIYAZAWA @USAGI | |
7 | * Kunihiro Ishiguro <kunihiro@ipinfusion.com> | |
8 | * IPv6 support | |
9 | * YOSHIFUJI Hideaki @USAGI | |
10 | * Split up af-specific functions | |
11 | * Derek Atkins <derek@ihtfp.com> | |
12 | * Add UDP Encapsulation | |
df71837d | 13 | * |
1da177e4 LT |
14 | */ |
15 | ||
16 | #include <linux/workqueue.h> | |
17 | #include <net/xfrm.h> | |
18 | #include <linux/pfkeyv2.h> | |
19 | #include <linux/ipsec.h> | |
20 | #include <linux/module.h> | |
f034b5d4 | 21 | #include <linux/cache.h> |
68277acc | 22 | #include <linux/audit.h> |
b5890d8b | 23 | #include <asm/uaccess.h> |
1da177e4 | 24 | |
44e36b42 DM |
25 | #include "xfrm_hash.h" |
26 | ||
ee857a7d DM |
27 | struct sock *xfrm_nl; |
28 | EXPORT_SYMBOL(xfrm_nl); | |
29 | ||
01e67d08 | 30 | u32 sysctl_xfrm_aevent_etime __read_mostly = XFRM_AE_ETIME; |
a70fcb0b DM |
31 | EXPORT_SYMBOL(sysctl_xfrm_aevent_etime); |
32 | ||
01e67d08 | 33 | u32 sysctl_xfrm_aevent_rseqth __read_mostly = XFRM_AE_SEQT_SIZE; |
a70fcb0b DM |
34 | EXPORT_SYMBOL(sysctl_xfrm_aevent_rseqth); |
35 | ||
01e67d08 DM |
36 | u32 sysctl_xfrm_acq_expires __read_mostly = 30; |
37 | ||
1da177e4 LT |
38 | /* Each xfrm_state may be linked to two tables: |
39 | ||
40 | 1. Hash table by (spi,daddr,ah/esp) to find SA by SPI. (input,ctl) | |
a624c108 | 41 | 2. Hash table by (daddr,family,reqid) to find what SAs exist for given |
1da177e4 LT |
42 | destination/tunnel endpoint. (output) |
43 | */ | |
44 | ||
45 | static DEFINE_SPINLOCK(xfrm_state_lock); | |
46 | ||
47 | /* Hash table to find appropriate SA towards given target (endpoint | |
48 | * of tunnel or destination of transport mode) allowed by selector. | |
49 | * | |
50 | * Main use is finding SA after policy selected tunnel or transport mode. | |
51 | * Also, it can be used by ah/esp icmp error handler to find offending SA. | |
52 | */ | |
f034b5d4 DM |
53 | static struct hlist_head *xfrm_state_bydst __read_mostly; |
54 | static struct hlist_head *xfrm_state_bysrc __read_mostly; | |
55 | static struct hlist_head *xfrm_state_byspi __read_mostly; | |
56 | static unsigned int xfrm_state_hmask __read_mostly; | |
57 | static unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024; | |
58 | static unsigned int xfrm_state_num; | |
9d4a706d | 59 | static unsigned int xfrm_state_genid; |
f034b5d4 | 60 | |
17c2a42a HX |
61 | static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family); |
62 | static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo); | |
63 | ||
afeb14b4 PM |
64 | #ifdef CONFIG_AUDITSYSCALL |
65 | static void xfrm_audit_state_replay(struct xfrm_state *x, | |
66 | struct sk_buff *skb, __be32 net_seq); | |
67 | #else | |
68 | #define xfrm_audit_state_replay(x, s, sq) do { ; } while (0) | |
69 | #endif /* CONFIG_AUDITSYSCALL */ | |
70 | ||
c1969f29 DM |
71 | static inline unsigned int xfrm_dst_hash(xfrm_address_t *daddr, |
72 | xfrm_address_t *saddr, | |
73 | u32 reqid, | |
a624c108 | 74 | unsigned short family) |
f034b5d4 | 75 | { |
c1969f29 | 76 | return __xfrm_dst_hash(daddr, saddr, reqid, family, xfrm_state_hmask); |
f034b5d4 DM |
77 | } |
78 | ||
667bbcb6 MN |
79 | static inline unsigned int xfrm_src_hash(xfrm_address_t *daddr, |
80 | xfrm_address_t *saddr, | |
44e36b42 | 81 | unsigned short family) |
f034b5d4 | 82 | { |
667bbcb6 | 83 | return __xfrm_src_hash(daddr, saddr, family, xfrm_state_hmask); |
f034b5d4 DM |
84 | } |
85 | ||
f034b5d4 | 86 | static inline unsigned int |
8122adf0 | 87 | xfrm_spi_hash(xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family) |
f034b5d4 | 88 | { |
c1969f29 | 89 | return __xfrm_spi_hash(daddr, spi, proto, family, xfrm_state_hmask); |
f034b5d4 DM |
90 | } |
91 | ||
f034b5d4 DM |
92 | static void xfrm_hash_transfer(struct hlist_head *list, |
93 | struct hlist_head *ndsttable, | |
94 | struct hlist_head *nsrctable, | |
95 | struct hlist_head *nspitable, | |
96 | unsigned int nhashmask) | |
97 | { | |
98 | struct hlist_node *entry, *tmp; | |
99 | struct xfrm_state *x; | |
100 | ||
101 | hlist_for_each_entry_safe(x, entry, tmp, list, bydst) { | |
102 | unsigned int h; | |
103 | ||
c1969f29 DM |
104 | h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr, |
105 | x->props.reqid, x->props.family, | |
106 | nhashmask); | |
f034b5d4 DM |
107 | hlist_add_head(&x->bydst, ndsttable+h); |
108 | ||
667bbcb6 MN |
109 | h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr, |
110 | x->props.family, | |
f034b5d4 DM |
111 | nhashmask); |
112 | hlist_add_head(&x->bysrc, nsrctable+h); | |
113 | ||
7b4dc360 MN |
114 | if (x->id.spi) { |
115 | h = __xfrm_spi_hash(&x->id.daddr, x->id.spi, | |
116 | x->id.proto, x->props.family, | |
117 | nhashmask); | |
118 | hlist_add_head(&x->byspi, nspitable+h); | |
119 | } | |
f034b5d4 DM |
120 | } |
121 | } | |
122 | ||
123 | static unsigned long xfrm_hash_new_size(void) | |
124 | { | |
125 | return ((xfrm_state_hmask + 1) << 1) * | |
126 | sizeof(struct hlist_head); | |
127 | } | |
128 | ||
129 | static DEFINE_MUTEX(hash_resize_mutex); | |
130 | ||
c4028958 | 131 | static void xfrm_hash_resize(struct work_struct *__unused) |
f034b5d4 DM |
132 | { |
133 | struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi; | |
134 | unsigned long nsize, osize; | |
135 | unsigned int nhashmask, ohashmask; | |
136 | int i; | |
137 | ||
138 | mutex_lock(&hash_resize_mutex); | |
139 | ||
140 | nsize = xfrm_hash_new_size(); | |
44e36b42 | 141 | ndst = xfrm_hash_alloc(nsize); |
f034b5d4 DM |
142 | if (!ndst) |
143 | goto out_unlock; | |
44e36b42 | 144 | nsrc = xfrm_hash_alloc(nsize); |
f034b5d4 | 145 | if (!nsrc) { |
44e36b42 | 146 | xfrm_hash_free(ndst, nsize); |
f034b5d4 DM |
147 | goto out_unlock; |
148 | } | |
44e36b42 | 149 | nspi = xfrm_hash_alloc(nsize); |
f034b5d4 | 150 | if (!nspi) { |
44e36b42 DM |
151 | xfrm_hash_free(ndst, nsize); |
152 | xfrm_hash_free(nsrc, nsize); | |
f034b5d4 DM |
153 | goto out_unlock; |
154 | } | |
155 | ||
156 | spin_lock_bh(&xfrm_state_lock); | |
157 | ||
158 | nhashmask = (nsize / sizeof(struct hlist_head)) - 1U; | |
159 | for (i = xfrm_state_hmask; i >= 0; i--) | |
160 | xfrm_hash_transfer(xfrm_state_bydst+i, ndst, nsrc, nspi, | |
161 | nhashmask); | |
162 | ||
163 | odst = xfrm_state_bydst; | |
164 | osrc = xfrm_state_bysrc; | |
165 | ospi = xfrm_state_byspi; | |
166 | ohashmask = xfrm_state_hmask; | |
167 | ||
168 | xfrm_state_bydst = ndst; | |
169 | xfrm_state_bysrc = nsrc; | |
170 | xfrm_state_byspi = nspi; | |
171 | xfrm_state_hmask = nhashmask; | |
172 | ||
173 | spin_unlock_bh(&xfrm_state_lock); | |
174 | ||
175 | osize = (ohashmask + 1) * sizeof(struct hlist_head); | |
44e36b42 DM |
176 | xfrm_hash_free(odst, osize); |
177 | xfrm_hash_free(osrc, osize); | |
178 | xfrm_hash_free(ospi, osize); | |
f034b5d4 DM |
179 | |
180 | out_unlock: | |
181 | mutex_unlock(&hash_resize_mutex); | |
182 | } | |
183 | ||
c4028958 | 184 | static DECLARE_WORK(xfrm_hash_work, xfrm_hash_resize); |
f034b5d4 | 185 | |
1da177e4 LT |
186 | DECLARE_WAIT_QUEUE_HEAD(km_waitq); |
187 | EXPORT_SYMBOL(km_waitq); | |
188 | ||
189 | static DEFINE_RWLOCK(xfrm_state_afinfo_lock); | |
190 | static struct xfrm_state_afinfo *xfrm_state_afinfo[NPROTO]; | |
191 | ||
192 | static struct work_struct xfrm_state_gc_work; | |
8f126e37 | 193 | static HLIST_HEAD(xfrm_state_gc_list); |
1da177e4 LT |
194 | static DEFINE_SPINLOCK(xfrm_state_gc_lock); |
195 | ||
53bc6b4d | 196 | int __xfrm_state_delete(struct xfrm_state *x); |
1da177e4 | 197 | |
980ebd25 | 198 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); |
53bc6b4d | 199 | void km_state_expired(struct xfrm_state *x, int hard, u32 pid); |
1da177e4 | 200 | |
aa5d62cc HX |
201 | static struct xfrm_state_afinfo *xfrm_state_lock_afinfo(unsigned int family) |
202 | { | |
203 | struct xfrm_state_afinfo *afinfo; | |
204 | if (unlikely(family >= NPROTO)) | |
205 | return NULL; | |
206 | write_lock_bh(&xfrm_state_afinfo_lock); | |
207 | afinfo = xfrm_state_afinfo[family]; | |
208 | if (unlikely(!afinfo)) | |
209 | write_unlock_bh(&xfrm_state_afinfo_lock); | |
210 | return afinfo; | |
211 | } | |
212 | ||
213 | static void xfrm_state_unlock_afinfo(struct xfrm_state_afinfo *afinfo) | |
9a429c49 | 214 | __releases(xfrm_state_afinfo_lock) |
aa5d62cc HX |
215 | { |
216 | write_unlock_bh(&xfrm_state_afinfo_lock); | |
217 | } | |
218 | ||
533cb5b0 | 219 | int xfrm_register_type(const struct xfrm_type *type, unsigned short family) |
aa5d62cc HX |
220 | { |
221 | struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family); | |
533cb5b0 | 222 | const struct xfrm_type **typemap; |
aa5d62cc HX |
223 | int err = 0; |
224 | ||
225 | if (unlikely(afinfo == NULL)) | |
226 | return -EAFNOSUPPORT; | |
227 | typemap = afinfo->type_map; | |
228 | ||
229 | if (likely(typemap[type->proto] == NULL)) | |
230 | typemap[type->proto] = type; | |
231 | else | |
232 | err = -EEXIST; | |
233 | xfrm_state_unlock_afinfo(afinfo); | |
234 | return err; | |
235 | } | |
236 | EXPORT_SYMBOL(xfrm_register_type); | |
237 | ||
533cb5b0 | 238 | int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family) |
aa5d62cc HX |
239 | { |
240 | struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family); | |
533cb5b0 | 241 | const struct xfrm_type **typemap; |
aa5d62cc HX |
242 | int err = 0; |
243 | ||
244 | if (unlikely(afinfo == NULL)) | |
245 | return -EAFNOSUPPORT; | |
246 | typemap = afinfo->type_map; | |
247 | ||
248 | if (unlikely(typemap[type->proto] != type)) | |
249 | err = -ENOENT; | |
250 | else | |
251 | typemap[type->proto] = NULL; | |
252 | xfrm_state_unlock_afinfo(afinfo); | |
253 | return err; | |
254 | } | |
255 | EXPORT_SYMBOL(xfrm_unregister_type); | |
256 | ||
533cb5b0 | 257 | static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family) |
aa5d62cc HX |
258 | { |
259 | struct xfrm_state_afinfo *afinfo; | |
533cb5b0 ED |
260 | const struct xfrm_type **typemap; |
261 | const struct xfrm_type *type; | |
aa5d62cc HX |
262 | int modload_attempted = 0; |
263 | ||
264 | retry: | |
265 | afinfo = xfrm_state_get_afinfo(family); | |
266 | if (unlikely(afinfo == NULL)) | |
267 | return NULL; | |
268 | typemap = afinfo->type_map; | |
269 | ||
270 | type = typemap[proto]; | |
271 | if (unlikely(type && !try_module_get(type->owner))) | |
272 | type = NULL; | |
273 | if (!type && !modload_attempted) { | |
274 | xfrm_state_put_afinfo(afinfo); | |
275 | request_module("xfrm-type-%d-%d", family, proto); | |
276 | modload_attempted = 1; | |
277 | goto retry; | |
278 | } | |
279 | ||
280 | xfrm_state_put_afinfo(afinfo); | |
281 | return type; | |
282 | } | |
283 | ||
533cb5b0 | 284 | static void xfrm_put_type(const struct xfrm_type *type) |
aa5d62cc HX |
285 | { |
286 | module_put(type->owner); | |
287 | } | |
288 | ||
289 | int xfrm_register_mode(struct xfrm_mode *mode, int family) | |
290 | { | |
291 | struct xfrm_state_afinfo *afinfo; | |
292 | struct xfrm_mode **modemap; | |
293 | int err; | |
294 | ||
295 | if (unlikely(mode->encap >= XFRM_MODE_MAX)) | |
296 | return -EINVAL; | |
297 | ||
298 | afinfo = xfrm_state_lock_afinfo(family); | |
299 | if (unlikely(afinfo == NULL)) | |
300 | return -EAFNOSUPPORT; | |
301 | ||
302 | err = -EEXIST; | |
303 | modemap = afinfo->mode_map; | |
17c2a42a HX |
304 | if (modemap[mode->encap]) |
305 | goto out; | |
aa5d62cc | 306 | |
17c2a42a HX |
307 | err = -ENOENT; |
308 | if (!try_module_get(afinfo->owner)) | |
309 | goto out; | |
310 | ||
311 | mode->afinfo = afinfo; | |
312 | modemap[mode->encap] = mode; | |
313 | err = 0; | |
314 | ||
315 | out: | |
aa5d62cc HX |
316 | xfrm_state_unlock_afinfo(afinfo); |
317 | return err; | |
318 | } | |
319 | EXPORT_SYMBOL(xfrm_register_mode); | |
320 | ||
321 | int xfrm_unregister_mode(struct xfrm_mode *mode, int family) | |
322 | { | |
323 | struct xfrm_state_afinfo *afinfo; | |
324 | struct xfrm_mode **modemap; | |
325 | int err; | |
326 | ||
327 | if (unlikely(mode->encap >= XFRM_MODE_MAX)) | |
328 | return -EINVAL; | |
329 | ||
330 | afinfo = xfrm_state_lock_afinfo(family); | |
331 | if (unlikely(afinfo == NULL)) | |
332 | return -EAFNOSUPPORT; | |
333 | ||
334 | err = -ENOENT; | |
335 | modemap = afinfo->mode_map; | |
336 | if (likely(modemap[mode->encap] == mode)) { | |
337 | modemap[mode->encap] = NULL; | |
17c2a42a | 338 | module_put(mode->afinfo->owner); |
aa5d62cc HX |
339 | err = 0; |
340 | } | |
341 | ||
342 | xfrm_state_unlock_afinfo(afinfo); | |
343 | return err; | |
344 | } | |
345 | EXPORT_SYMBOL(xfrm_unregister_mode); | |
346 | ||
347 | static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family) | |
348 | { | |
349 | struct xfrm_state_afinfo *afinfo; | |
350 | struct xfrm_mode *mode; | |
351 | int modload_attempted = 0; | |
352 | ||
353 | if (unlikely(encap >= XFRM_MODE_MAX)) | |
354 | return NULL; | |
355 | ||
356 | retry: | |
357 | afinfo = xfrm_state_get_afinfo(family); | |
358 | if (unlikely(afinfo == NULL)) | |
359 | return NULL; | |
360 | ||
361 | mode = afinfo->mode_map[encap]; | |
362 | if (unlikely(mode && !try_module_get(mode->owner))) | |
363 | mode = NULL; | |
364 | if (!mode && !modload_attempted) { | |
365 | xfrm_state_put_afinfo(afinfo); | |
366 | request_module("xfrm-mode-%d-%d", family, encap); | |
367 | modload_attempted = 1; | |
368 | goto retry; | |
369 | } | |
370 | ||
371 | xfrm_state_put_afinfo(afinfo); | |
372 | return mode; | |
373 | } | |
374 | ||
375 | static void xfrm_put_mode(struct xfrm_mode *mode) | |
376 | { | |
377 | module_put(mode->owner); | |
378 | } | |
379 | ||
1da177e4 LT |
380 | static void xfrm_state_gc_destroy(struct xfrm_state *x) |
381 | { | |
a47f0ce0 DM |
382 | del_timer_sync(&x->timer); |
383 | del_timer_sync(&x->rtimer); | |
a51482bd JJ |
384 | kfree(x->aalg); |
385 | kfree(x->ealg); | |
386 | kfree(x->calg); | |
387 | kfree(x->encap); | |
060f02a3 | 388 | kfree(x->coaddr); |
13996378 HX |
389 | if (x->inner_mode) |
390 | xfrm_put_mode(x->inner_mode); | |
391 | if (x->outer_mode) | |
392 | xfrm_put_mode(x->outer_mode); | |
1da177e4 LT |
393 | if (x->type) { |
394 | x->type->destructor(x); | |
395 | xfrm_put_type(x->type); | |
396 | } | |
df71837d | 397 | security_xfrm_state_free(x); |
1da177e4 LT |
398 | kfree(x); |
399 | } | |
400 | ||
c4028958 | 401 | static void xfrm_state_gc_task(struct work_struct *data) |
1da177e4 LT |
402 | { |
403 | struct xfrm_state *x; | |
8f126e37 DM |
404 | struct hlist_node *entry, *tmp; |
405 | struct hlist_head gc_list; | |
1da177e4 | 406 | |
1da177e4 | 407 | spin_lock_bh(&xfrm_state_gc_lock); |
8f126e37 DM |
408 | gc_list.first = xfrm_state_gc_list.first; |
409 | INIT_HLIST_HEAD(&xfrm_state_gc_list); | |
1da177e4 LT |
410 | spin_unlock_bh(&xfrm_state_gc_lock); |
411 | ||
8f126e37 | 412 | hlist_for_each_entry_safe(x, entry, tmp, &gc_list, bydst) |
1da177e4 | 413 | xfrm_state_gc_destroy(x); |
8f126e37 | 414 | |
1da177e4 LT |
415 | wake_up(&km_waitq); |
416 | } | |
417 | ||
418 | static inline unsigned long make_jiffies(long secs) | |
419 | { | |
420 | if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ) | |
421 | return MAX_SCHEDULE_TIMEOUT-1; | |
422 | else | |
a716c119 | 423 | return secs*HZ; |
1da177e4 LT |
424 | } |
425 | ||
426 | static void xfrm_timer_handler(unsigned long data) | |
427 | { | |
428 | struct xfrm_state *x = (struct xfrm_state*)data; | |
9d729f72 | 429 | unsigned long now = get_seconds(); |
1da177e4 LT |
430 | long next = LONG_MAX; |
431 | int warn = 0; | |
161a09e7 | 432 | int err = 0; |
1da177e4 LT |
433 | |
434 | spin_lock(&x->lock); | |
435 | if (x->km.state == XFRM_STATE_DEAD) | |
436 | goto out; | |
437 | if (x->km.state == XFRM_STATE_EXPIRED) | |
438 | goto expired; | |
439 | if (x->lft.hard_add_expires_seconds) { | |
440 | long tmo = x->lft.hard_add_expires_seconds + | |
441 | x->curlft.add_time - now; | |
442 | if (tmo <= 0) | |
443 | goto expired; | |
444 | if (tmo < next) | |
445 | next = tmo; | |
446 | } | |
447 | if (x->lft.hard_use_expires_seconds) { | |
448 | long tmo = x->lft.hard_use_expires_seconds + | |
449 | (x->curlft.use_time ? : now) - now; | |
450 | if (tmo <= 0) | |
451 | goto expired; | |
452 | if (tmo < next) | |
453 | next = tmo; | |
454 | } | |
455 | if (x->km.dying) | |
456 | goto resched; | |
457 | if (x->lft.soft_add_expires_seconds) { | |
458 | long tmo = x->lft.soft_add_expires_seconds + | |
459 | x->curlft.add_time - now; | |
460 | if (tmo <= 0) | |
461 | warn = 1; | |
462 | else if (tmo < next) | |
463 | next = tmo; | |
464 | } | |
465 | if (x->lft.soft_use_expires_seconds) { | |
466 | long tmo = x->lft.soft_use_expires_seconds + | |
467 | (x->curlft.use_time ? : now) - now; | |
468 | if (tmo <= 0) | |
469 | warn = 1; | |
470 | else if (tmo < next) | |
471 | next = tmo; | |
472 | } | |
473 | ||
4666faab | 474 | x->km.dying = warn; |
1da177e4 | 475 | if (warn) |
53bc6b4d | 476 | km_state_expired(x, 0, 0); |
1da177e4 | 477 | resched: |
a47f0ce0 DM |
478 | if (next != LONG_MAX) |
479 | mod_timer(&x->timer, jiffies + make_jiffies(next)); | |
480 | ||
1da177e4 LT |
481 | goto out; |
482 | ||
483 | expired: | |
484 | if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) { | |
485 | x->km.state = XFRM_STATE_EXPIRED; | |
486 | wake_up(&km_waitq); | |
487 | next = 2; | |
488 | goto resched; | |
489 | } | |
161a09e7 JL |
490 | |
491 | err = __xfrm_state_delete(x); | |
492 | if (!err && x->id.spi) | |
53bc6b4d | 493 | km_state_expired(x, 1, 0); |
1da177e4 | 494 | |
ab5f5e8b | 495 | xfrm_audit_state_delete(x, err ? 0 : 1, |
0c11b942 | 496 | audit_get_loginuid(current), 0); |
161a09e7 | 497 | |
1da177e4 LT |
498 | out: |
499 | spin_unlock(&x->lock); | |
1da177e4 LT |
500 | } |
501 | ||
0ac84752 DM |
502 | static void xfrm_replay_timer_handler(unsigned long data); |
503 | ||
1da177e4 LT |
504 | struct xfrm_state *xfrm_state_alloc(void) |
505 | { | |
506 | struct xfrm_state *x; | |
507 | ||
0da974f4 | 508 | x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC); |
1da177e4 LT |
509 | |
510 | if (x) { | |
1da177e4 LT |
511 | atomic_set(&x->refcnt, 1); |
512 | atomic_set(&x->tunnel_users, 0); | |
8f126e37 DM |
513 | INIT_HLIST_NODE(&x->bydst); |
514 | INIT_HLIST_NODE(&x->bysrc); | |
515 | INIT_HLIST_NODE(&x->byspi); | |
b24b8a24 PE |
516 | setup_timer(&x->timer, xfrm_timer_handler, (unsigned long)x); |
517 | setup_timer(&x->rtimer, xfrm_replay_timer_handler, | |
518 | (unsigned long)x); | |
9d729f72 | 519 | x->curlft.add_time = get_seconds(); |
1da177e4 LT |
520 | x->lft.soft_byte_limit = XFRM_INF; |
521 | x->lft.soft_packet_limit = XFRM_INF; | |
522 | x->lft.hard_byte_limit = XFRM_INF; | |
523 | x->lft.hard_packet_limit = XFRM_INF; | |
f8cd5488 JHS |
524 | x->replay_maxage = 0; |
525 | x->replay_maxdiff = 0; | |
1da177e4 LT |
526 | spin_lock_init(&x->lock); |
527 | } | |
528 | return x; | |
529 | } | |
530 | EXPORT_SYMBOL(xfrm_state_alloc); | |
531 | ||
532 | void __xfrm_state_destroy(struct xfrm_state *x) | |
533 | { | |
534 | BUG_TRAP(x->km.state == XFRM_STATE_DEAD); | |
535 | ||
536 | spin_lock_bh(&xfrm_state_gc_lock); | |
8f126e37 | 537 | hlist_add_head(&x->bydst, &xfrm_state_gc_list); |
1da177e4 LT |
538 | spin_unlock_bh(&xfrm_state_gc_lock); |
539 | schedule_work(&xfrm_state_gc_work); | |
540 | } | |
541 | EXPORT_SYMBOL(__xfrm_state_destroy); | |
542 | ||
53bc6b4d | 543 | int __xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 544 | { |
26b15dad JHS |
545 | int err = -ESRCH; |
546 | ||
1da177e4 LT |
547 | if (x->km.state != XFRM_STATE_DEAD) { |
548 | x->km.state = XFRM_STATE_DEAD; | |
549 | spin_lock(&xfrm_state_lock); | |
8f126e37 | 550 | hlist_del(&x->bydst); |
8f126e37 | 551 | hlist_del(&x->bysrc); |
a47f0ce0 | 552 | if (x->id.spi) |
8f126e37 | 553 | hlist_del(&x->byspi); |
f034b5d4 | 554 | xfrm_state_num--; |
1da177e4 | 555 | spin_unlock(&xfrm_state_lock); |
1da177e4 | 556 | |
1da177e4 LT |
557 | /* All xfrm_state objects are created by xfrm_state_alloc. |
558 | * The xfrm_state_alloc call gives a reference, and that | |
559 | * is what we are dropping here. | |
560 | */ | |
5dba4797 | 561 | xfrm_state_put(x); |
26b15dad | 562 | err = 0; |
1da177e4 | 563 | } |
26b15dad JHS |
564 | |
565 | return err; | |
1da177e4 | 566 | } |
53bc6b4d | 567 | EXPORT_SYMBOL(__xfrm_state_delete); |
1da177e4 | 568 | |
26b15dad | 569 | int xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 570 | { |
26b15dad JHS |
571 | int err; |
572 | ||
1da177e4 | 573 | spin_lock_bh(&x->lock); |
26b15dad | 574 | err = __xfrm_state_delete(x); |
1da177e4 | 575 | spin_unlock_bh(&x->lock); |
26b15dad JHS |
576 | |
577 | return err; | |
1da177e4 LT |
578 | } |
579 | EXPORT_SYMBOL(xfrm_state_delete); | |
580 | ||
4aa2e62c JL |
581 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
582 | static inline int | |
583 | xfrm_state_flush_secctx_check(u8 proto, struct xfrm_audit *audit_info) | |
1da177e4 | 584 | { |
4aa2e62c JL |
585 | int i, err = 0; |
586 | ||
587 | for (i = 0; i <= xfrm_state_hmask; i++) { | |
588 | struct hlist_node *entry; | |
589 | struct xfrm_state *x; | |
590 | ||
591 | hlist_for_each_entry(x, entry, xfrm_state_bydst+i, bydst) { | |
592 | if (xfrm_id_proto_match(x->id.proto, proto) && | |
593 | (err = security_xfrm_state_delete(x)) != 0) { | |
ab5f5e8b JL |
594 | xfrm_audit_state_delete(x, 0, |
595 | audit_info->loginuid, | |
596 | audit_info->secid); | |
4aa2e62c JL |
597 | return err; |
598 | } | |
599 | } | |
600 | } | |
601 | ||
602 | return err; | |
603 | } | |
604 | #else | |
605 | static inline int | |
606 | xfrm_state_flush_secctx_check(u8 proto, struct xfrm_audit *audit_info) | |
607 | { | |
608 | return 0; | |
609 | } | |
610 | #endif | |
611 | ||
612 | int xfrm_state_flush(u8 proto, struct xfrm_audit *audit_info) | |
613 | { | |
614 | int i, err = 0; | |
1da177e4 LT |
615 | |
616 | spin_lock_bh(&xfrm_state_lock); | |
4aa2e62c JL |
617 | err = xfrm_state_flush_secctx_check(proto, audit_info); |
618 | if (err) | |
619 | goto out; | |
620 | ||
a9917c06 | 621 | for (i = 0; i <= xfrm_state_hmask; i++) { |
8f126e37 DM |
622 | struct hlist_node *entry; |
623 | struct xfrm_state *x; | |
1da177e4 | 624 | restart: |
8f126e37 | 625 | hlist_for_each_entry(x, entry, xfrm_state_bydst+i, bydst) { |
1da177e4 | 626 | if (!xfrm_state_kern(x) && |
5794708f | 627 | xfrm_id_proto_match(x->id.proto, proto)) { |
1da177e4 LT |
628 | xfrm_state_hold(x); |
629 | spin_unlock_bh(&xfrm_state_lock); | |
630 | ||
161a09e7 | 631 | err = xfrm_state_delete(x); |
ab5f5e8b JL |
632 | xfrm_audit_state_delete(x, err ? 0 : 1, |
633 | audit_info->loginuid, | |
634 | audit_info->secid); | |
1da177e4 LT |
635 | xfrm_state_put(x); |
636 | ||
637 | spin_lock_bh(&xfrm_state_lock); | |
638 | goto restart; | |
639 | } | |
640 | } | |
641 | } | |
4aa2e62c JL |
642 | err = 0; |
643 | ||
644 | out: | |
1da177e4 LT |
645 | spin_unlock_bh(&xfrm_state_lock); |
646 | wake_up(&km_waitq); | |
4aa2e62c | 647 | return err; |
1da177e4 LT |
648 | } |
649 | EXPORT_SYMBOL(xfrm_state_flush); | |
650 | ||
af11e316 | 651 | void xfrm_sad_getinfo(struct xfrmk_sadinfo *si) |
28d8909b JHS |
652 | { |
653 | spin_lock_bh(&xfrm_state_lock); | |
654 | si->sadcnt = xfrm_state_num; | |
655 | si->sadhcnt = xfrm_state_hmask; | |
656 | si->sadhmcnt = xfrm_state_hashmax; | |
657 | spin_unlock_bh(&xfrm_state_lock); | |
658 | } | |
659 | EXPORT_SYMBOL(xfrm_sad_getinfo); | |
660 | ||
1da177e4 LT |
661 | static int |
662 | xfrm_init_tempsel(struct xfrm_state *x, struct flowi *fl, | |
663 | struct xfrm_tmpl *tmpl, | |
664 | xfrm_address_t *daddr, xfrm_address_t *saddr, | |
665 | unsigned short family) | |
666 | { | |
667 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
668 | if (!afinfo) | |
669 | return -1; | |
670 | afinfo->init_tempsel(x, fl, tmpl, daddr, saddr); | |
671 | xfrm_state_put_afinfo(afinfo); | |
672 | return 0; | |
673 | } | |
674 | ||
a94cfd19 | 675 | static struct xfrm_state *__xfrm_state_lookup(xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family) |
edcd5821 DM |
676 | { |
677 | unsigned int h = xfrm_spi_hash(daddr, spi, proto, family); | |
678 | struct xfrm_state *x; | |
8f126e37 | 679 | struct hlist_node *entry; |
edcd5821 | 680 | |
8f126e37 | 681 | hlist_for_each_entry(x, entry, xfrm_state_byspi+h, byspi) { |
edcd5821 DM |
682 | if (x->props.family != family || |
683 | x->id.spi != spi || | |
684 | x->id.proto != proto) | |
685 | continue; | |
686 | ||
687 | switch (family) { | |
688 | case AF_INET: | |
689 | if (x->id.daddr.a4 != daddr->a4) | |
690 | continue; | |
691 | break; | |
692 | case AF_INET6: | |
693 | if (!ipv6_addr_equal((struct in6_addr *)daddr, | |
694 | (struct in6_addr *) | |
695 | x->id.daddr.a6)) | |
696 | continue; | |
697 | break; | |
3ff50b79 | 698 | } |
edcd5821 DM |
699 | |
700 | xfrm_state_hold(x); | |
701 | return x; | |
702 | } | |
703 | ||
704 | return NULL; | |
705 | } | |
706 | ||
707 | static struct xfrm_state *__xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family) | |
708 | { | |
667bbcb6 | 709 | unsigned int h = xfrm_src_hash(daddr, saddr, family); |
edcd5821 | 710 | struct xfrm_state *x; |
8f126e37 | 711 | struct hlist_node *entry; |
edcd5821 | 712 | |
8f126e37 | 713 | hlist_for_each_entry(x, entry, xfrm_state_bysrc+h, bysrc) { |
edcd5821 DM |
714 | if (x->props.family != family || |
715 | x->id.proto != proto) | |
716 | continue; | |
717 | ||
718 | switch (family) { | |
719 | case AF_INET: | |
720 | if (x->id.daddr.a4 != daddr->a4 || | |
721 | x->props.saddr.a4 != saddr->a4) | |
722 | continue; | |
723 | break; | |
724 | case AF_INET6: | |
725 | if (!ipv6_addr_equal((struct in6_addr *)daddr, | |
726 | (struct in6_addr *) | |
727 | x->id.daddr.a6) || | |
728 | !ipv6_addr_equal((struct in6_addr *)saddr, | |
729 | (struct in6_addr *) | |
730 | x->props.saddr.a6)) | |
731 | continue; | |
732 | break; | |
3ff50b79 | 733 | } |
edcd5821 DM |
734 | |
735 | xfrm_state_hold(x); | |
736 | return x; | |
737 | } | |
738 | ||
739 | return NULL; | |
740 | } | |
741 | ||
742 | static inline struct xfrm_state * | |
743 | __xfrm_state_locate(struct xfrm_state *x, int use_spi, int family) | |
744 | { | |
745 | if (use_spi) | |
746 | return __xfrm_state_lookup(&x->id.daddr, x->id.spi, | |
747 | x->id.proto, family); | |
748 | else | |
749 | return __xfrm_state_lookup_byaddr(&x->id.daddr, | |
750 | &x->props.saddr, | |
751 | x->id.proto, family); | |
752 | } | |
753 | ||
2fab22f2 PM |
754 | static void xfrm_hash_grow_check(int have_hash_collision) |
755 | { | |
756 | if (have_hash_collision && | |
757 | (xfrm_state_hmask + 1) < xfrm_state_hashmax && | |
758 | xfrm_state_num > xfrm_state_hmask) | |
759 | schedule_work(&xfrm_hash_work); | |
760 | } | |
761 | ||
1da177e4 | 762 | struct xfrm_state * |
a716c119 | 763 | xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, |
1da177e4 LT |
764 | struct flowi *fl, struct xfrm_tmpl *tmpl, |
765 | struct xfrm_policy *pol, int *err, | |
766 | unsigned short family) | |
767 | { | |
4bda4f25 | 768 | unsigned int h; |
8f126e37 | 769 | struct hlist_node *entry; |
1da177e4 LT |
770 | struct xfrm_state *x, *x0; |
771 | int acquire_in_progress = 0; | |
772 | int error = 0; | |
773 | struct xfrm_state *best = NULL; | |
a716c119 | 774 | |
1da177e4 | 775 | spin_lock_bh(&xfrm_state_lock); |
4bda4f25 | 776 | h = xfrm_dst_hash(daddr, saddr, tmpl->reqid, family); |
8f126e37 | 777 | hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) { |
1da177e4 LT |
778 | if (x->props.family == family && |
779 | x->props.reqid == tmpl->reqid && | |
fbd9a5b4 | 780 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
1da177e4 LT |
781 | xfrm_state_addr_check(x, daddr, saddr, family) && |
782 | tmpl->mode == x->props.mode && | |
783 | tmpl->id.proto == x->id.proto && | |
784 | (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) { | |
785 | /* Resolution logic: | |
786 | 1. There is a valid state with matching selector. | |
787 | Done. | |
788 | 2. Valid state with inappropriate selector. Skip. | |
789 | ||
790 | Entering area of "sysdeps". | |
791 | ||
792 | 3. If state is not valid, selector is temporary, | |
793 | it selects only session which triggered | |
794 | previous resolution. Key manager will do | |
795 | something to install a state with proper | |
796 | selector. | |
797 | */ | |
798 | if (x->km.state == XFRM_STATE_VALID) { | |
48b8d783 | 799 | if (!xfrm_selector_match(&x->sel, fl, x->sel.family) || |
e0d1caa7 | 800 | !security_xfrm_state_pol_flow_match(x, pol, fl)) |
1da177e4 LT |
801 | continue; |
802 | if (!best || | |
803 | best->km.dying > x->km.dying || | |
804 | (best->km.dying == x->km.dying && | |
805 | best->curlft.add_time < x->curlft.add_time)) | |
806 | best = x; | |
807 | } else if (x->km.state == XFRM_STATE_ACQ) { | |
808 | acquire_in_progress = 1; | |
809 | } else if (x->km.state == XFRM_STATE_ERROR || | |
810 | x->km.state == XFRM_STATE_EXPIRED) { | |
48b8d783 | 811 | if (xfrm_selector_match(&x->sel, fl, x->sel.family) && |
e0d1caa7 | 812 | security_xfrm_state_pol_flow_match(x, pol, fl)) |
1da177e4 LT |
813 | error = -ESRCH; |
814 | } | |
815 | } | |
816 | } | |
817 | ||
818 | x = best; | |
819 | if (!x && !error && !acquire_in_progress) { | |
5c5d281a | 820 | if (tmpl->id.spi && |
edcd5821 DM |
821 | (x0 = __xfrm_state_lookup(daddr, tmpl->id.spi, |
822 | tmpl->id.proto, family)) != NULL) { | |
1da177e4 LT |
823 | xfrm_state_put(x0); |
824 | error = -EEXIST; | |
825 | goto out; | |
826 | } | |
827 | x = xfrm_state_alloc(); | |
828 | if (x == NULL) { | |
829 | error = -ENOMEM; | |
830 | goto out; | |
831 | } | |
832 | /* Initialize temporary selector matching only | |
833 | * to current session. */ | |
834 | xfrm_init_tempsel(x, fl, tmpl, daddr, saddr, family); | |
835 | ||
e0d1caa7 VY |
836 | error = security_xfrm_state_alloc_acquire(x, pol->security, fl->secid); |
837 | if (error) { | |
838 | x->km.state = XFRM_STATE_DEAD; | |
839 | xfrm_state_put(x); | |
840 | x = NULL; | |
841 | goto out; | |
842 | } | |
843 | ||
1da177e4 LT |
844 | if (km_query(x, tmpl, pol) == 0) { |
845 | x->km.state = XFRM_STATE_ACQ; | |
8f126e37 | 846 | hlist_add_head(&x->bydst, xfrm_state_bydst+h); |
667bbcb6 | 847 | h = xfrm_src_hash(daddr, saddr, family); |
8f126e37 | 848 | hlist_add_head(&x->bysrc, xfrm_state_bysrc+h); |
1da177e4 LT |
849 | if (x->id.spi) { |
850 | h = xfrm_spi_hash(&x->id.daddr, x->id.spi, x->id.proto, family); | |
8f126e37 | 851 | hlist_add_head(&x->byspi, xfrm_state_byspi+h); |
1da177e4 | 852 | } |
01e67d08 DM |
853 | x->lft.hard_add_expires_seconds = sysctl_xfrm_acq_expires; |
854 | x->timer.expires = jiffies + sysctl_xfrm_acq_expires*HZ; | |
1da177e4 | 855 | add_timer(&x->timer); |
2fab22f2 PM |
856 | xfrm_state_num++; |
857 | xfrm_hash_grow_check(x->bydst.next != NULL); | |
1da177e4 LT |
858 | } else { |
859 | x->km.state = XFRM_STATE_DEAD; | |
860 | xfrm_state_put(x); | |
861 | x = NULL; | |
862 | error = -ESRCH; | |
863 | } | |
864 | } | |
865 | out: | |
866 | if (x) | |
867 | xfrm_state_hold(x); | |
868 | else | |
869 | *err = acquire_in_progress ? -EAGAIN : error; | |
870 | spin_unlock_bh(&xfrm_state_lock); | |
1da177e4 LT |
871 | return x; |
872 | } | |
873 | ||
628529b6 JHS |
874 | struct xfrm_state * |
875 | xfrm_stateonly_find(xfrm_address_t *daddr, xfrm_address_t *saddr, | |
876 | unsigned short family, u8 mode, u8 proto, u32 reqid) | |
877 | { | |
4bda4f25 | 878 | unsigned int h; |
628529b6 JHS |
879 | struct xfrm_state *rx = NULL, *x = NULL; |
880 | struct hlist_node *entry; | |
881 | ||
882 | spin_lock(&xfrm_state_lock); | |
4bda4f25 | 883 | h = xfrm_dst_hash(daddr, saddr, reqid, family); |
628529b6 JHS |
884 | hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) { |
885 | if (x->props.family == family && | |
886 | x->props.reqid == reqid && | |
887 | !(x->props.flags & XFRM_STATE_WILDRECV) && | |
888 | xfrm_state_addr_check(x, daddr, saddr, family) && | |
889 | mode == x->props.mode && | |
890 | proto == x->id.proto && | |
891 | x->km.state == XFRM_STATE_VALID) { | |
892 | rx = x; | |
893 | break; | |
894 | } | |
895 | } | |
896 | ||
897 | if (rx) | |
898 | xfrm_state_hold(rx); | |
899 | spin_unlock(&xfrm_state_lock); | |
900 | ||
901 | ||
902 | return rx; | |
903 | } | |
904 | EXPORT_SYMBOL(xfrm_stateonly_find); | |
905 | ||
1da177e4 LT |
906 | static void __xfrm_state_insert(struct xfrm_state *x) |
907 | { | |
a624c108 | 908 | unsigned int h; |
1da177e4 | 909 | |
9d4a706d DM |
910 | x->genid = ++xfrm_state_genid; |
911 | ||
c1969f29 DM |
912 | h = xfrm_dst_hash(&x->id.daddr, &x->props.saddr, |
913 | x->props.reqid, x->props.family); | |
8f126e37 | 914 | hlist_add_head(&x->bydst, xfrm_state_bydst+h); |
1da177e4 | 915 | |
667bbcb6 | 916 | h = xfrm_src_hash(&x->id.daddr, &x->props.saddr, x->props.family); |
8f126e37 | 917 | hlist_add_head(&x->bysrc, xfrm_state_bysrc+h); |
1da177e4 | 918 | |
7b4dc360 | 919 | if (x->id.spi) { |
6c44e6b7 MN |
920 | h = xfrm_spi_hash(&x->id.daddr, x->id.spi, x->id.proto, |
921 | x->props.family); | |
922 | ||
8f126e37 | 923 | hlist_add_head(&x->byspi, xfrm_state_byspi+h); |
6c44e6b7 MN |
924 | } |
925 | ||
a47f0ce0 DM |
926 | mod_timer(&x->timer, jiffies + HZ); |
927 | if (x->replay_maxage) | |
928 | mod_timer(&x->rtimer, jiffies + x->replay_maxage); | |
f8cd5488 | 929 | |
1da177e4 | 930 | wake_up(&km_waitq); |
f034b5d4 DM |
931 | |
932 | xfrm_state_num++; | |
933 | ||
918049f0 | 934 | xfrm_hash_grow_check(x->bydst.next != NULL); |
1da177e4 LT |
935 | } |
936 | ||
c7f5ea3a DM |
937 | /* xfrm_state_lock is held */ |
938 | static void __xfrm_state_bump_genids(struct xfrm_state *xnew) | |
939 | { | |
940 | unsigned short family = xnew->props.family; | |
941 | u32 reqid = xnew->props.reqid; | |
942 | struct xfrm_state *x; | |
943 | struct hlist_node *entry; | |
944 | unsigned int h; | |
945 | ||
c1969f29 | 946 | h = xfrm_dst_hash(&xnew->id.daddr, &xnew->props.saddr, reqid, family); |
c7f5ea3a DM |
947 | hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) { |
948 | if (x->props.family == family && | |
949 | x->props.reqid == reqid && | |
c1969f29 DM |
950 | !xfrm_addr_cmp(&x->id.daddr, &xnew->id.daddr, family) && |
951 | !xfrm_addr_cmp(&x->props.saddr, &xnew->props.saddr, family)) | |
c7f5ea3a DM |
952 | x->genid = xfrm_state_genid; |
953 | } | |
954 | } | |
955 | ||
1da177e4 LT |
956 | void xfrm_state_insert(struct xfrm_state *x) |
957 | { | |
958 | spin_lock_bh(&xfrm_state_lock); | |
c7f5ea3a | 959 | __xfrm_state_bump_genids(x); |
1da177e4 LT |
960 | __xfrm_state_insert(x); |
961 | spin_unlock_bh(&xfrm_state_lock); | |
962 | } | |
963 | EXPORT_SYMBOL(xfrm_state_insert); | |
964 | ||
2770834c DM |
965 | /* xfrm_state_lock is held */ |
966 | 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) | |
967 | { | |
c1969f29 | 968 | unsigned int h = xfrm_dst_hash(daddr, saddr, reqid, family); |
8f126e37 | 969 | struct hlist_node *entry; |
2770834c DM |
970 | struct xfrm_state *x; |
971 | ||
8f126e37 | 972 | hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) { |
2770834c DM |
973 | if (x->props.reqid != reqid || |
974 | x->props.mode != mode || | |
975 | x->props.family != family || | |
976 | x->km.state != XFRM_STATE_ACQ || | |
75e252d9 JL |
977 | x->id.spi != 0 || |
978 | x->id.proto != proto) | |
2770834c DM |
979 | continue; |
980 | ||
981 | switch (family) { | |
982 | case AF_INET: | |
983 | if (x->id.daddr.a4 != daddr->a4 || | |
984 | x->props.saddr.a4 != saddr->a4) | |
985 | continue; | |
986 | break; | |
987 | case AF_INET6: | |
988 | if (!ipv6_addr_equal((struct in6_addr *)x->id.daddr.a6, | |
989 | (struct in6_addr *)daddr) || | |
990 | !ipv6_addr_equal((struct in6_addr *) | |
991 | x->props.saddr.a6, | |
992 | (struct in6_addr *)saddr)) | |
993 | continue; | |
994 | break; | |
3ff50b79 | 995 | } |
2770834c DM |
996 | |
997 | xfrm_state_hold(x); | |
998 | return x; | |
999 | } | |
1000 | ||
1001 | if (!create) | |
1002 | return NULL; | |
1003 | ||
1004 | x = xfrm_state_alloc(); | |
1005 | if (likely(x)) { | |
1006 | switch (family) { | |
1007 | case AF_INET: | |
1008 | x->sel.daddr.a4 = daddr->a4; | |
1009 | x->sel.saddr.a4 = saddr->a4; | |
1010 | x->sel.prefixlen_d = 32; | |
1011 | x->sel.prefixlen_s = 32; | |
1012 | x->props.saddr.a4 = saddr->a4; | |
1013 | x->id.daddr.a4 = daddr->a4; | |
1014 | break; | |
1015 | ||
1016 | case AF_INET6: | |
1017 | ipv6_addr_copy((struct in6_addr *)x->sel.daddr.a6, | |
1018 | (struct in6_addr *)daddr); | |
1019 | ipv6_addr_copy((struct in6_addr *)x->sel.saddr.a6, | |
1020 | (struct in6_addr *)saddr); | |
1021 | x->sel.prefixlen_d = 128; | |
1022 | x->sel.prefixlen_s = 128; | |
1023 | ipv6_addr_copy((struct in6_addr *)x->props.saddr.a6, | |
1024 | (struct in6_addr *)saddr); | |
1025 | ipv6_addr_copy((struct in6_addr *)x->id.daddr.a6, | |
1026 | (struct in6_addr *)daddr); | |
1027 | break; | |
3ff50b79 | 1028 | } |
2770834c DM |
1029 | |
1030 | x->km.state = XFRM_STATE_ACQ; | |
1031 | x->id.proto = proto; | |
1032 | x->props.family = family; | |
1033 | x->props.mode = mode; | |
1034 | x->props.reqid = reqid; | |
01e67d08 | 1035 | x->lft.hard_add_expires_seconds = sysctl_xfrm_acq_expires; |
2770834c | 1036 | xfrm_state_hold(x); |
01e67d08 | 1037 | x->timer.expires = jiffies + sysctl_xfrm_acq_expires*HZ; |
2770834c | 1038 | add_timer(&x->timer); |
8f126e37 | 1039 | hlist_add_head(&x->bydst, xfrm_state_bydst+h); |
667bbcb6 | 1040 | h = xfrm_src_hash(daddr, saddr, family); |
8f126e37 | 1041 | hlist_add_head(&x->bysrc, xfrm_state_bysrc+h); |
918049f0 DM |
1042 | |
1043 | xfrm_state_num++; | |
1044 | ||
1045 | xfrm_hash_grow_check(x->bydst.next != NULL); | |
2770834c DM |
1046 | } |
1047 | ||
1048 | return x; | |
1049 | } | |
1050 | ||
1da177e4 LT |
1051 | static struct xfrm_state *__xfrm_find_acq_byseq(u32 seq); |
1052 | ||
1053 | int xfrm_state_add(struct xfrm_state *x) | |
1054 | { | |
1da177e4 LT |
1055 | struct xfrm_state *x1; |
1056 | int family; | |
1057 | int err; | |
eb2971b6 | 1058 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
1da177e4 LT |
1059 | |
1060 | family = x->props.family; | |
1da177e4 LT |
1061 | |
1062 | spin_lock_bh(&xfrm_state_lock); | |
1063 | ||
edcd5821 | 1064 | x1 = __xfrm_state_locate(x, use_spi, family); |
1da177e4 LT |
1065 | if (x1) { |
1066 | xfrm_state_put(x1); | |
1067 | x1 = NULL; | |
1068 | err = -EEXIST; | |
1069 | goto out; | |
1070 | } | |
1071 | ||
eb2971b6 | 1072 | if (use_spi && x->km.seq) { |
1da177e4 | 1073 | x1 = __xfrm_find_acq_byseq(x->km.seq); |
75e252d9 JL |
1074 | if (x1 && ((x1->id.proto != x->id.proto) || |
1075 | xfrm_addr_cmp(&x1->id.daddr, &x->id.daddr, family))) { | |
1da177e4 LT |
1076 | xfrm_state_put(x1); |
1077 | x1 = NULL; | |
1078 | } | |
1079 | } | |
1080 | ||
eb2971b6 | 1081 | if (use_spi && !x1) |
2770834c DM |
1082 | x1 = __find_acq_core(family, x->props.mode, x->props.reqid, |
1083 | x->id.proto, | |
1084 | &x->id.daddr, &x->props.saddr, 0); | |
1da177e4 | 1085 | |
c7f5ea3a | 1086 | __xfrm_state_bump_genids(x); |
1da177e4 LT |
1087 | __xfrm_state_insert(x); |
1088 | err = 0; | |
1089 | ||
1090 | out: | |
1091 | spin_unlock_bh(&xfrm_state_lock); | |
1da177e4 LT |
1092 | |
1093 | if (x1) { | |
1094 | xfrm_state_delete(x1); | |
1095 | xfrm_state_put(x1); | |
1096 | } | |
1097 | ||
1098 | return err; | |
1099 | } | |
1100 | EXPORT_SYMBOL(xfrm_state_add); | |
1101 | ||
80c9abaa | 1102 | #ifdef CONFIG_XFRM_MIGRATE |
6666351d | 1103 | static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, int *errp) |
80c9abaa SS |
1104 | { |
1105 | int err = -ENOMEM; | |
1106 | struct xfrm_state *x = xfrm_state_alloc(); | |
1107 | if (!x) | |
1108 | goto error; | |
1109 | ||
1110 | memcpy(&x->id, &orig->id, sizeof(x->id)); | |
1111 | memcpy(&x->sel, &orig->sel, sizeof(x->sel)); | |
1112 | memcpy(&x->lft, &orig->lft, sizeof(x->lft)); | |
1113 | x->props.mode = orig->props.mode; | |
1114 | x->props.replay_window = orig->props.replay_window; | |
1115 | x->props.reqid = orig->props.reqid; | |
1116 | x->props.family = orig->props.family; | |
1117 | x->props.saddr = orig->props.saddr; | |
1118 | ||
1119 | if (orig->aalg) { | |
1120 | x->aalg = xfrm_algo_clone(orig->aalg); | |
1121 | if (!x->aalg) | |
1122 | goto error; | |
1123 | } | |
1124 | x->props.aalgo = orig->props.aalgo; | |
1125 | ||
1126 | if (orig->ealg) { | |
1127 | x->ealg = xfrm_algo_clone(orig->ealg); | |
1128 | if (!x->ealg) | |
1129 | goto error; | |
1130 | } | |
1131 | x->props.ealgo = orig->props.ealgo; | |
1132 | ||
1133 | if (orig->calg) { | |
1134 | x->calg = xfrm_algo_clone(orig->calg); | |
1135 | if (!x->calg) | |
1136 | goto error; | |
1137 | } | |
1138 | x->props.calgo = orig->props.calgo; | |
1139 | ||
a716c119 | 1140 | if (orig->encap) { |
80c9abaa SS |
1141 | x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL); |
1142 | if (!x->encap) | |
1143 | goto error; | |
1144 | } | |
1145 | ||
1146 | if (orig->coaddr) { | |
1147 | x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr), | |
1148 | GFP_KERNEL); | |
1149 | if (!x->coaddr) | |
1150 | goto error; | |
1151 | } | |
1152 | ||
1153 | err = xfrm_init_state(x); | |
1154 | if (err) | |
1155 | goto error; | |
1156 | ||
1157 | x->props.flags = orig->props.flags; | |
1158 | ||
1159 | x->curlft.add_time = orig->curlft.add_time; | |
1160 | x->km.state = orig->km.state; | |
1161 | x->km.seq = orig->km.seq; | |
1162 | ||
1163 | return x; | |
1164 | ||
1165 | error: | |
1166 | if (errp) | |
1167 | *errp = err; | |
1168 | if (x) { | |
1169 | kfree(x->aalg); | |
1170 | kfree(x->ealg); | |
1171 | kfree(x->calg); | |
1172 | kfree(x->encap); | |
1173 | kfree(x->coaddr); | |
1174 | } | |
1175 | kfree(x); | |
1176 | return NULL; | |
1177 | } | |
80c9abaa SS |
1178 | |
1179 | /* xfrm_state_lock is held */ | |
1180 | struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m) | |
1181 | { | |
1182 | unsigned int h; | |
1183 | struct xfrm_state *x; | |
1184 | struct hlist_node *entry; | |
1185 | ||
1186 | if (m->reqid) { | |
1187 | h = xfrm_dst_hash(&m->old_daddr, &m->old_saddr, | |
1188 | m->reqid, m->old_family); | |
1189 | hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) { | |
1190 | if (x->props.mode != m->mode || | |
1191 | x->id.proto != m->proto) | |
1192 | continue; | |
1193 | if (m->reqid && x->props.reqid != m->reqid) | |
1194 | continue; | |
1195 | if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr, | |
1196 | m->old_family) || | |
1197 | xfrm_addr_cmp(&x->props.saddr, &m->old_saddr, | |
1198 | m->old_family)) | |
1199 | continue; | |
1200 | xfrm_state_hold(x); | |
1201 | return x; | |
1202 | } | |
1203 | } else { | |
1204 | h = xfrm_src_hash(&m->old_daddr, &m->old_saddr, | |
1205 | m->old_family); | |
1206 | hlist_for_each_entry(x, entry, xfrm_state_bysrc+h, bysrc) { | |
1207 | if (x->props.mode != m->mode || | |
1208 | x->id.proto != m->proto) | |
1209 | continue; | |
1210 | if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr, | |
1211 | m->old_family) || | |
1212 | xfrm_addr_cmp(&x->props.saddr, &m->old_saddr, | |
1213 | m->old_family)) | |
1214 | continue; | |
1215 | xfrm_state_hold(x); | |
1216 | return x; | |
1217 | } | |
1218 | } | |
1219 | ||
a716c119 | 1220 | return NULL; |
80c9abaa SS |
1221 | } |
1222 | EXPORT_SYMBOL(xfrm_migrate_state_find); | |
1223 | ||
1224 | struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, | |
1225 | struct xfrm_migrate *m) | |
1226 | { | |
1227 | struct xfrm_state *xc; | |
1228 | int err; | |
1229 | ||
1230 | xc = xfrm_state_clone(x, &err); | |
1231 | if (!xc) | |
1232 | return NULL; | |
1233 | ||
1234 | memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr)); | |
1235 | memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr)); | |
1236 | ||
1237 | /* add state */ | |
1238 | if (!xfrm_addr_cmp(&x->id.daddr, &m->new_daddr, m->new_family)) { | |
1239 | /* a care is needed when the destination address of the | |
1240 | state is to be updated as it is a part of triplet */ | |
1241 | xfrm_state_insert(xc); | |
1242 | } else { | |
1243 | if ((err = xfrm_state_add(xc)) < 0) | |
1244 | goto error; | |
1245 | } | |
1246 | ||
1247 | return xc; | |
1248 | error: | |
1249 | kfree(xc); | |
1250 | return NULL; | |
1251 | } | |
1252 | EXPORT_SYMBOL(xfrm_state_migrate); | |
1253 | #endif | |
1254 | ||
1da177e4 LT |
1255 | int xfrm_state_update(struct xfrm_state *x) |
1256 | { | |
1da177e4 LT |
1257 | struct xfrm_state *x1; |
1258 | int err; | |
eb2971b6 | 1259 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
1da177e4 | 1260 | |
1da177e4 | 1261 | spin_lock_bh(&xfrm_state_lock); |
edcd5821 | 1262 | x1 = __xfrm_state_locate(x, use_spi, x->props.family); |
1da177e4 LT |
1263 | |
1264 | err = -ESRCH; | |
1265 | if (!x1) | |
1266 | goto out; | |
1267 | ||
1268 | if (xfrm_state_kern(x1)) { | |
1269 | xfrm_state_put(x1); | |
1270 | err = -EEXIST; | |
1271 | goto out; | |
1272 | } | |
1273 | ||
1274 | if (x1->km.state == XFRM_STATE_ACQ) { | |
1275 | __xfrm_state_insert(x); | |
1276 | x = NULL; | |
1277 | } | |
1278 | err = 0; | |
1279 | ||
1280 | out: | |
1281 | spin_unlock_bh(&xfrm_state_lock); | |
1da177e4 LT |
1282 | |
1283 | if (err) | |
1284 | return err; | |
1285 | ||
1286 | if (!x) { | |
1287 | xfrm_state_delete(x1); | |
1288 | xfrm_state_put(x1); | |
1289 | return 0; | |
1290 | } | |
1291 | ||
1292 | err = -EINVAL; | |
1293 | spin_lock_bh(&x1->lock); | |
1294 | if (likely(x1->km.state == XFRM_STATE_VALID)) { | |
1295 | if (x->encap && x1->encap) | |
1296 | memcpy(x1->encap, x->encap, sizeof(*x1->encap)); | |
060f02a3 NT |
1297 | if (x->coaddr && x1->coaddr) { |
1298 | memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr)); | |
1299 | } | |
1300 | if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel))) | |
1301 | memcpy(&x1->sel, &x->sel, sizeof(x1->sel)); | |
1da177e4 LT |
1302 | memcpy(&x1->lft, &x->lft, sizeof(x1->lft)); |
1303 | x1->km.dying = 0; | |
1304 | ||
a47f0ce0 | 1305 | mod_timer(&x1->timer, jiffies + HZ); |
1da177e4 LT |
1306 | if (x1->curlft.use_time) |
1307 | xfrm_state_check_expire(x1); | |
1308 | ||
1309 | err = 0; | |
1310 | } | |
1311 | spin_unlock_bh(&x1->lock); | |
1312 | ||
1313 | xfrm_state_put(x1); | |
1314 | ||
1315 | return err; | |
1316 | } | |
1317 | EXPORT_SYMBOL(xfrm_state_update); | |
1318 | ||
1319 | int xfrm_state_check_expire(struct xfrm_state *x) | |
1320 | { | |
1321 | if (!x->curlft.use_time) | |
9d729f72 | 1322 | x->curlft.use_time = get_seconds(); |
1da177e4 LT |
1323 | |
1324 | if (x->km.state != XFRM_STATE_VALID) | |
1325 | return -EINVAL; | |
1326 | ||
1327 | if (x->curlft.bytes >= x->lft.hard_byte_limit || | |
1328 | x->curlft.packets >= x->lft.hard_packet_limit) { | |
4666faab | 1329 | x->km.state = XFRM_STATE_EXPIRED; |
a47f0ce0 | 1330 | mod_timer(&x->timer, jiffies); |
1da177e4 LT |
1331 | return -EINVAL; |
1332 | } | |
1333 | ||
1334 | if (!x->km.dying && | |
1335 | (x->curlft.bytes >= x->lft.soft_byte_limit || | |
4666faab HX |
1336 | x->curlft.packets >= x->lft.soft_packet_limit)) { |
1337 | x->km.dying = 1; | |
53bc6b4d | 1338 | km_state_expired(x, 0, 0); |
4666faab | 1339 | } |
1da177e4 LT |
1340 | return 0; |
1341 | } | |
1342 | EXPORT_SYMBOL(xfrm_state_check_expire); | |
1343 | ||
1da177e4 | 1344 | struct xfrm_state * |
a94cfd19 | 1345 | xfrm_state_lookup(xfrm_address_t *daddr, __be32 spi, u8 proto, |
1da177e4 LT |
1346 | unsigned short family) |
1347 | { | |
1348 | struct xfrm_state *x; | |
1da177e4 LT |
1349 | |
1350 | spin_lock_bh(&xfrm_state_lock); | |
edcd5821 | 1351 | x = __xfrm_state_lookup(daddr, spi, proto, family); |
1da177e4 | 1352 | spin_unlock_bh(&xfrm_state_lock); |
1da177e4 LT |
1353 | return x; |
1354 | } | |
1355 | EXPORT_SYMBOL(xfrm_state_lookup); | |
1356 | ||
1357 | struct xfrm_state * | |
eb2971b6 MN |
1358 | xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, |
1359 | u8 proto, unsigned short family) | |
1360 | { | |
1361 | struct xfrm_state *x; | |
eb2971b6 MN |
1362 | |
1363 | spin_lock_bh(&xfrm_state_lock); | |
edcd5821 | 1364 | x = __xfrm_state_lookup_byaddr(daddr, saddr, proto, family); |
eb2971b6 | 1365 | spin_unlock_bh(&xfrm_state_lock); |
eb2971b6 MN |
1366 | return x; |
1367 | } | |
1368 | EXPORT_SYMBOL(xfrm_state_lookup_byaddr); | |
1369 | ||
1370 | struct xfrm_state * | |
a716c119 YH |
1371 | xfrm_find_acq(u8 mode, u32 reqid, u8 proto, |
1372 | xfrm_address_t *daddr, xfrm_address_t *saddr, | |
1da177e4 LT |
1373 | int create, unsigned short family) |
1374 | { | |
1375 | struct xfrm_state *x; | |
1da177e4 LT |
1376 | |
1377 | spin_lock_bh(&xfrm_state_lock); | |
2770834c | 1378 | x = __find_acq_core(family, mode, reqid, proto, daddr, saddr, create); |
1da177e4 | 1379 | spin_unlock_bh(&xfrm_state_lock); |
2770834c | 1380 | |
1da177e4 LT |
1381 | return x; |
1382 | } | |
1383 | EXPORT_SYMBOL(xfrm_find_acq); | |
1384 | ||
41a49cc3 MN |
1385 | #ifdef CONFIG_XFRM_SUB_POLICY |
1386 | int | |
1387 | xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, | |
1388 | unsigned short family) | |
1389 | { | |
1390 | int err = 0; | |
1391 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
1392 | if (!afinfo) | |
1393 | return -EAFNOSUPPORT; | |
1394 | ||
1395 | spin_lock_bh(&xfrm_state_lock); | |
1396 | if (afinfo->tmpl_sort) | |
1397 | err = afinfo->tmpl_sort(dst, src, n); | |
1398 | spin_unlock_bh(&xfrm_state_lock); | |
1399 | xfrm_state_put_afinfo(afinfo); | |
1400 | return err; | |
1401 | } | |
1402 | EXPORT_SYMBOL(xfrm_tmpl_sort); | |
1403 | ||
1404 | int | |
1405 | xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, | |
1406 | unsigned short family) | |
1407 | { | |
1408 | int err = 0; | |
1409 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
1410 | if (!afinfo) | |
1411 | return -EAFNOSUPPORT; | |
1412 | ||
1413 | spin_lock_bh(&xfrm_state_lock); | |
1414 | if (afinfo->state_sort) | |
1415 | err = afinfo->state_sort(dst, src, n); | |
1416 | spin_unlock_bh(&xfrm_state_lock); | |
1417 | xfrm_state_put_afinfo(afinfo); | |
1418 | return err; | |
1419 | } | |
1420 | EXPORT_SYMBOL(xfrm_state_sort); | |
1421 | #endif | |
1422 | ||
1da177e4 LT |
1423 | /* Silly enough, but I'm lazy to build resolution list */ |
1424 | ||
1425 | static struct xfrm_state *__xfrm_find_acq_byseq(u32 seq) | |
1426 | { | |
1427 | int i; | |
1da177e4 | 1428 | |
f034b5d4 | 1429 | for (i = 0; i <= xfrm_state_hmask; i++) { |
8f126e37 DM |
1430 | struct hlist_node *entry; |
1431 | struct xfrm_state *x; | |
1432 | ||
1433 | hlist_for_each_entry(x, entry, xfrm_state_bydst+i, bydst) { | |
1434 | if (x->km.seq == seq && | |
1435 | x->km.state == XFRM_STATE_ACQ) { | |
1da177e4 LT |
1436 | xfrm_state_hold(x); |
1437 | return x; | |
1438 | } | |
1439 | } | |
1440 | } | |
1441 | return NULL; | |
1442 | } | |
1443 | ||
1444 | struct xfrm_state *xfrm_find_acq_byseq(u32 seq) | |
1445 | { | |
1446 | struct xfrm_state *x; | |
1447 | ||
1448 | spin_lock_bh(&xfrm_state_lock); | |
1449 | x = __xfrm_find_acq_byseq(seq); | |
1450 | spin_unlock_bh(&xfrm_state_lock); | |
1451 | return x; | |
1452 | } | |
1453 | EXPORT_SYMBOL(xfrm_find_acq_byseq); | |
1454 | ||
1455 | u32 xfrm_get_acqseq(void) | |
1456 | { | |
1457 | u32 res; | |
1458 | static u32 acqseq; | |
1459 | static DEFINE_SPINLOCK(acqseq_lock); | |
1460 | ||
1461 | spin_lock_bh(&acqseq_lock); | |
1462 | res = (++acqseq ? : ++acqseq); | |
1463 | spin_unlock_bh(&acqseq_lock); | |
1464 | return res; | |
1465 | } | |
1466 | EXPORT_SYMBOL(xfrm_get_acqseq); | |
1467 | ||
658b219e | 1468 | int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high) |
1da177e4 | 1469 | { |
f034b5d4 | 1470 | unsigned int h; |
1da177e4 | 1471 | struct xfrm_state *x0; |
658b219e HX |
1472 | int err = -ENOENT; |
1473 | __be32 minspi = htonl(low); | |
1474 | __be32 maxspi = htonl(high); | |
1da177e4 | 1475 | |
658b219e HX |
1476 | spin_lock_bh(&x->lock); |
1477 | if (x->km.state == XFRM_STATE_DEAD) | |
1478 | goto unlock; | |
1479 | ||
1480 | err = 0; | |
1da177e4 | 1481 | if (x->id.spi) |
658b219e HX |
1482 | goto unlock; |
1483 | ||
1484 | err = -ENOENT; | |
1da177e4 LT |
1485 | |
1486 | if (minspi == maxspi) { | |
1487 | x0 = xfrm_state_lookup(&x->id.daddr, minspi, x->id.proto, x->props.family); | |
1488 | if (x0) { | |
1489 | xfrm_state_put(x0); | |
658b219e | 1490 | goto unlock; |
1da177e4 LT |
1491 | } |
1492 | x->id.spi = minspi; | |
1493 | } else { | |
1494 | u32 spi = 0; | |
26977b4e AV |
1495 | for (h=0; h<high-low+1; h++) { |
1496 | spi = low + net_random()%(high-low+1); | |
1da177e4 LT |
1497 | x0 = xfrm_state_lookup(&x->id.daddr, htonl(spi), x->id.proto, x->props.family); |
1498 | if (x0 == NULL) { | |
1499 | x->id.spi = htonl(spi); | |
1500 | break; | |
1501 | } | |
1502 | xfrm_state_put(x0); | |
1503 | } | |
1504 | } | |
1505 | if (x->id.spi) { | |
1506 | spin_lock_bh(&xfrm_state_lock); | |
1507 | h = xfrm_spi_hash(&x->id.daddr, x->id.spi, x->id.proto, x->props.family); | |
8f126e37 | 1508 | hlist_add_head(&x->byspi, xfrm_state_byspi+h); |
1da177e4 | 1509 | spin_unlock_bh(&xfrm_state_lock); |
658b219e HX |
1510 | |
1511 | err = 0; | |
1da177e4 | 1512 | } |
658b219e HX |
1513 | |
1514 | unlock: | |
1515 | spin_unlock_bh(&x->lock); | |
1516 | ||
1517 | return err; | |
1da177e4 LT |
1518 | } |
1519 | EXPORT_SYMBOL(xfrm_alloc_spi); | |
1520 | ||
1521 | int xfrm_state_walk(u8 proto, int (*func)(struct xfrm_state *, int, void*), | |
1522 | void *data) | |
1523 | { | |
1524 | int i; | |
94b9bb54 | 1525 | struct xfrm_state *x, *last = NULL; |
8f126e37 | 1526 | struct hlist_node *entry; |
1da177e4 LT |
1527 | int count = 0; |
1528 | int err = 0; | |
1529 | ||
1530 | spin_lock_bh(&xfrm_state_lock); | |
f034b5d4 | 1531 | for (i = 0; i <= xfrm_state_hmask; i++) { |
8f126e37 | 1532 | hlist_for_each_entry(x, entry, xfrm_state_bydst+i, bydst) { |
94b9bb54 JHS |
1533 | if (!xfrm_id_proto_match(x->id.proto, proto)) |
1534 | continue; | |
1535 | if (last) { | |
1536 | err = func(last, count, data); | |
1537 | if (err) | |
1538 | goto out; | |
1539 | } | |
1540 | last = x; | |
1541 | count++; | |
1da177e4 LT |
1542 | } |
1543 | } | |
1544 | if (count == 0) { | |
1545 | err = -ENOENT; | |
1546 | goto out; | |
1547 | } | |
94b9bb54 | 1548 | err = func(last, 0, data); |
1da177e4 LT |
1549 | out: |
1550 | spin_unlock_bh(&xfrm_state_lock); | |
1551 | return err; | |
1552 | } | |
1553 | EXPORT_SYMBOL(xfrm_state_walk); | |
1554 | ||
f8cd5488 JHS |
1555 | |
1556 | void xfrm_replay_notify(struct xfrm_state *x, int event) | |
1557 | { | |
1558 | struct km_event c; | |
1559 | /* we send notify messages in case | |
1560 | * 1. we updated on of the sequence numbers, and the seqno difference | |
1561 | * is at least x->replay_maxdiff, in this case we also update the | |
1562 | * timeout of our timer function | |
1563 | * 2. if x->replay_maxage has elapsed since last update, | |
1564 | * and there were changes | |
1565 | * | |
1566 | * The state structure must be locked! | |
1567 | */ | |
1568 | ||
1569 | switch (event) { | |
1570 | case XFRM_REPLAY_UPDATE: | |
1571 | if (x->replay_maxdiff && | |
1572 | (x->replay.seq - x->preplay.seq < x->replay_maxdiff) && | |
2717096a JHS |
1573 | (x->replay.oseq - x->preplay.oseq < x->replay_maxdiff)) { |
1574 | if (x->xflags & XFRM_TIME_DEFER) | |
1575 | event = XFRM_REPLAY_TIMEOUT; | |
1576 | else | |
1577 | return; | |
1578 | } | |
f8cd5488 JHS |
1579 | |
1580 | break; | |
1581 | ||
1582 | case XFRM_REPLAY_TIMEOUT: | |
1583 | if ((x->replay.seq == x->preplay.seq) && | |
1584 | (x->replay.bitmap == x->preplay.bitmap) && | |
2717096a JHS |
1585 | (x->replay.oseq == x->preplay.oseq)) { |
1586 | x->xflags |= XFRM_TIME_DEFER; | |
f8cd5488 | 1587 | return; |
2717096a | 1588 | } |
f8cd5488 JHS |
1589 | |
1590 | break; | |
1591 | } | |
1592 | ||
1593 | memcpy(&x->preplay, &x->replay, sizeof(struct xfrm_replay_state)); | |
1594 | c.event = XFRM_MSG_NEWAE; | |
1595 | c.data.aevent = event; | |
1596 | km_state_notify(x, &c); | |
1597 | ||
f8cd5488 | 1598 | if (x->replay_maxage && |
a47f0ce0 | 1599 | !mod_timer(&x->rtimer, jiffies + x->replay_maxage)) |
2717096a | 1600 | x->xflags &= ~XFRM_TIME_DEFER; |
f8cd5488 JHS |
1601 | } |
1602 | ||
1603 | static void xfrm_replay_timer_handler(unsigned long data) | |
1604 | { | |
1605 | struct xfrm_state *x = (struct xfrm_state*)data; | |
1606 | ||
1607 | spin_lock(&x->lock); | |
1608 | ||
2717096a JHS |
1609 | if (x->km.state == XFRM_STATE_VALID) { |
1610 | if (xfrm_aevent_is_on()) | |
1611 | xfrm_replay_notify(x, XFRM_REPLAY_TIMEOUT); | |
1612 | else | |
1613 | x->xflags |= XFRM_TIME_DEFER; | |
1614 | } | |
f8cd5488 JHS |
1615 | |
1616 | spin_unlock(&x->lock); | |
1617 | } | |
1618 | ||
afeb14b4 PM |
1619 | int xfrm_replay_check(struct xfrm_state *x, |
1620 | struct sk_buff *skb, __be32 net_seq) | |
1da177e4 LT |
1621 | { |
1622 | u32 diff; | |
a252cc23 | 1623 | u32 seq = ntohl(net_seq); |
1da177e4 LT |
1624 | |
1625 | if (unlikely(seq == 0)) | |
afeb14b4 | 1626 | goto err; |
1da177e4 LT |
1627 | |
1628 | if (likely(seq > x->replay.seq)) | |
1629 | return 0; | |
1630 | ||
1631 | diff = x->replay.seq - seq; | |
4c4d51a7 HX |
1632 | if (diff >= min_t(unsigned int, x->props.replay_window, |
1633 | sizeof(x->replay.bitmap) * 8)) { | |
1da177e4 | 1634 | x->stats.replay_window++; |
afeb14b4 | 1635 | goto err; |
1da177e4 LT |
1636 | } |
1637 | ||
1638 | if (x->replay.bitmap & (1U << diff)) { | |
1639 | x->stats.replay++; | |
afeb14b4 | 1640 | goto err; |
1da177e4 LT |
1641 | } |
1642 | return 0; | |
afeb14b4 PM |
1643 | |
1644 | err: | |
1645 | xfrm_audit_state_replay(x, skb, net_seq); | |
1646 | return -EINVAL; | |
1da177e4 | 1647 | } |
1da177e4 | 1648 | |
61f4627b | 1649 | void xfrm_replay_advance(struct xfrm_state *x, __be32 net_seq) |
1da177e4 LT |
1650 | { |
1651 | u32 diff; | |
61f4627b | 1652 | u32 seq = ntohl(net_seq); |
1da177e4 LT |
1653 | |
1654 | if (seq > x->replay.seq) { | |
1655 | diff = seq - x->replay.seq; | |
1656 | if (diff < x->props.replay_window) | |
1657 | x->replay.bitmap = ((x->replay.bitmap) << diff) | 1; | |
1658 | else | |
1659 | x->replay.bitmap = 1; | |
1660 | x->replay.seq = seq; | |
1661 | } else { | |
1662 | diff = x->replay.seq - seq; | |
1663 | x->replay.bitmap |= (1U << diff); | |
1664 | } | |
f8cd5488 JHS |
1665 | |
1666 | if (xfrm_aevent_is_on()) | |
1667 | xfrm_replay_notify(x, XFRM_REPLAY_UPDATE); | |
1da177e4 | 1668 | } |
1da177e4 | 1669 | |
df01812e | 1670 | static LIST_HEAD(xfrm_km_list); |
1da177e4 LT |
1671 | static DEFINE_RWLOCK(xfrm_km_lock); |
1672 | ||
26b15dad | 1673 | void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) |
1da177e4 LT |
1674 | { |
1675 | struct xfrm_mgr *km; | |
1676 | ||
26b15dad JHS |
1677 | read_lock(&xfrm_km_lock); |
1678 | list_for_each_entry(km, &xfrm_km_list, list) | |
1679 | if (km->notify_policy) | |
1680 | km->notify_policy(xp, dir, c); | |
1681 | read_unlock(&xfrm_km_lock); | |
1682 | } | |
1da177e4 | 1683 | |
26b15dad JHS |
1684 | void km_state_notify(struct xfrm_state *x, struct km_event *c) |
1685 | { | |
1686 | struct xfrm_mgr *km; | |
1da177e4 LT |
1687 | read_lock(&xfrm_km_lock); |
1688 | list_for_each_entry(km, &xfrm_km_list, list) | |
26b15dad JHS |
1689 | if (km->notify) |
1690 | km->notify(x, c); | |
1da177e4 | 1691 | read_unlock(&xfrm_km_lock); |
26b15dad JHS |
1692 | } |
1693 | ||
1694 | EXPORT_SYMBOL(km_policy_notify); | |
1695 | EXPORT_SYMBOL(km_state_notify); | |
1696 | ||
53bc6b4d | 1697 | void km_state_expired(struct xfrm_state *x, int hard, u32 pid) |
26b15dad JHS |
1698 | { |
1699 | struct km_event c; | |
1700 | ||
bf08867f | 1701 | c.data.hard = hard; |
53bc6b4d | 1702 | c.pid = pid; |
f60f6b8f | 1703 | c.event = XFRM_MSG_EXPIRE; |
26b15dad | 1704 | km_state_notify(x, &c); |
1da177e4 LT |
1705 | |
1706 | if (hard) | |
1707 | wake_up(&km_waitq); | |
1708 | } | |
1709 | ||
53bc6b4d | 1710 | EXPORT_SYMBOL(km_state_expired); |
26b15dad JHS |
1711 | /* |
1712 | * We send to all registered managers regardless of failure | |
1713 | * We are happy with one success | |
1714 | */ | |
980ebd25 | 1715 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol) |
1da177e4 | 1716 | { |
26b15dad | 1717 | int err = -EINVAL, acqret; |
1da177e4 LT |
1718 | struct xfrm_mgr *km; |
1719 | ||
1720 | read_lock(&xfrm_km_lock); | |
1721 | list_for_each_entry(km, &xfrm_km_list, list) { | |
26b15dad JHS |
1722 | acqret = km->acquire(x, t, pol, XFRM_POLICY_OUT); |
1723 | if (!acqret) | |
1724 | err = acqret; | |
1da177e4 LT |
1725 | } |
1726 | read_unlock(&xfrm_km_lock); | |
1727 | return err; | |
1728 | } | |
980ebd25 | 1729 | EXPORT_SYMBOL(km_query); |
1da177e4 | 1730 | |
5d36b180 | 1731 | int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) |
1da177e4 LT |
1732 | { |
1733 | int err = -EINVAL; | |
1734 | struct xfrm_mgr *km; | |
1735 | ||
1736 | read_lock(&xfrm_km_lock); | |
1737 | list_for_each_entry(km, &xfrm_km_list, list) { | |
1738 | if (km->new_mapping) | |
1739 | err = km->new_mapping(x, ipaddr, sport); | |
1740 | if (!err) | |
1741 | break; | |
1742 | } | |
1743 | read_unlock(&xfrm_km_lock); | |
1744 | return err; | |
1745 | } | |
1746 | EXPORT_SYMBOL(km_new_mapping); | |
1747 | ||
6c5c8ca7 | 1748 | void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid) |
1da177e4 | 1749 | { |
26b15dad | 1750 | struct km_event c; |
1da177e4 | 1751 | |
bf08867f | 1752 | c.data.hard = hard; |
6c5c8ca7 | 1753 | c.pid = pid; |
f60f6b8f | 1754 | c.event = XFRM_MSG_POLEXPIRE; |
26b15dad | 1755 | km_policy_notify(pol, dir, &c); |
1da177e4 LT |
1756 | |
1757 | if (hard) | |
1758 | wake_up(&km_waitq); | |
1759 | } | |
a70fcb0b | 1760 | EXPORT_SYMBOL(km_policy_expired); |
1da177e4 | 1761 | |
2d60abc2 | 1762 | #ifdef CONFIG_XFRM_MIGRATE |
80c9abaa SS |
1763 | int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type, |
1764 | struct xfrm_migrate *m, int num_migrate) | |
1765 | { | |
1766 | int err = -EINVAL; | |
1767 | int ret; | |
1768 | struct xfrm_mgr *km; | |
1769 | ||
1770 | read_lock(&xfrm_km_lock); | |
1771 | list_for_each_entry(km, &xfrm_km_list, list) { | |
1772 | if (km->migrate) { | |
1773 | ret = km->migrate(sel, dir, type, m, num_migrate); | |
1774 | if (!ret) | |
1775 | err = ret; | |
1776 | } | |
1777 | } | |
1778 | read_unlock(&xfrm_km_lock); | |
1779 | return err; | |
1780 | } | |
1781 | EXPORT_SYMBOL(km_migrate); | |
2d60abc2 | 1782 | #endif |
80c9abaa | 1783 | |
97a64b45 MN |
1784 | int km_report(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr) |
1785 | { | |
1786 | int err = -EINVAL; | |
1787 | int ret; | |
1788 | struct xfrm_mgr *km; | |
1789 | ||
1790 | read_lock(&xfrm_km_lock); | |
1791 | list_for_each_entry(km, &xfrm_km_list, list) { | |
1792 | if (km->report) { | |
1793 | ret = km->report(proto, sel, addr); | |
1794 | if (!ret) | |
1795 | err = ret; | |
1796 | } | |
1797 | } | |
1798 | read_unlock(&xfrm_km_lock); | |
1799 | return err; | |
1800 | } | |
1801 | EXPORT_SYMBOL(km_report); | |
1802 | ||
1da177e4 LT |
1803 | int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) |
1804 | { | |
1805 | int err; | |
1806 | u8 *data; | |
1807 | struct xfrm_mgr *km; | |
1808 | struct xfrm_policy *pol = NULL; | |
1809 | ||
1810 | if (optlen <= 0 || optlen > PAGE_SIZE) | |
1811 | return -EMSGSIZE; | |
1812 | ||
1813 | data = kmalloc(optlen, GFP_KERNEL); | |
1814 | if (!data) | |
1815 | return -ENOMEM; | |
1816 | ||
1817 | err = -EFAULT; | |
1818 | if (copy_from_user(data, optval, optlen)) | |
1819 | goto out; | |
1820 | ||
1821 | err = -EINVAL; | |
1822 | read_lock(&xfrm_km_lock); | |
1823 | list_for_each_entry(km, &xfrm_km_list, list) { | |
cb969f07 | 1824 | pol = km->compile_policy(sk, optname, data, |
1da177e4 LT |
1825 | optlen, &err); |
1826 | if (err >= 0) | |
1827 | break; | |
1828 | } | |
1829 | read_unlock(&xfrm_km_lock); | |
1830 | ||
1831 | if (err >= 0) { | |
1832 | xfrm_sk_policy_insert(sk, err, pol); | |
1833 | xfrm_pol_put(pol); | |
1834 | err = 0; | |
1835 | } | |
1836 | ||
1837 | out: | |
1838 | kfree(data); | |
1839 | return err; | |
1840 | } | |
1841 | EXPORT_SYMBOL(xfrm_user_policy); | |
1842 | ||
1843 | int xfrm_register_km(struct xfrm_mgr *km) | |
1844 | { | |
1845 | write_lock_bh(&xfrm_km_lock); | |
1846 | list_add_tail(&km->list, &xfrm_km_list); | |
1847 | write_unlock_bh(&xfrm_km_lock); | |
1848 | return 0; | |
1849 | } | |
1850 | EXPORT_SYMBOL(xfrm_register_km); | |
1851 | ||
1852 | int xfrm_unregister_km(struct xfrm_mgr *km) | |
1853 | { | |
1854 | write_lock_bh(&xfrm_km_lock); | |
1855 | list_del(&km->list); | |
1856 | write_unlock_bh(&xfrm_km_lock); | |
1857 | return 0; | |
1858 | } | |
1859 | EXPORT_SYMBOL(xfrm_unregister_km); | |
1860 | ||
1861 | int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo) | |
1862 | { | |
1863 | int err = 0; | |
1864 | if (unlikely(afinfo == NULL)) | |
1865 | return -EINVAL; | |
1866 | if (unlikely(afinfo->family >= NPROTO)) | |
1867 | return -EAFNOSUPPORT; | |
f3111502 | 1868 | write_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1869 | if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL)) |
1870 | err = -ENOBUFS; | |
edcd5821 | 1871 | else |
1da177e4 | 1872 | xfrm_state_afinfo[afinfo->family] = afinfo; |
f3111502 | 1873 | write_unlock_bh(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1874 | return err; |
1875 | } | |
1876 | EXPORT_SYMBOL(xfrm_state_register_afinfo); | |
1877 | ||
1878 | int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo) | |
1879 | { | |
1880 | int err = 0; | |
1881 | if (unlikely(afinfo == NULL)) | |
1882 | return -EINVAL; | |
1883 | if (unlikely(afinfo->family >= NPROTO)) | |
1884 | return -EAFNOSUPPORT; | |
f3111502 | 1885 | write_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1886 | if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) { |
1887 | if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo)) | |
1888 | err = -EINVAL; | |
edcd5821 | 1889 | else |
1da177e4 | 1890 | xfrm_state_afinfo[afinfo->family] = NULL; |
1da177e4 | 1891 | } |
f3111502 | 1892 | write_unlock_bh(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1893 | return err; |
1894 | } | |
1895 | EXPORT_SYMBOL(xfrm_state_unregister_afinfo); | |
1896 | ||
17c2a42a | 1897 | static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family) |
1da177e4 LT |
1898 | { |
1899 | struct xfrm_state_afinfo *afinfo; | |
1900 | if (unlikely(family >= NPROTO)) | |
1901 | return NULL; | |
1902 | read_lock(&xfrm_state_afinfo_lock); | |
1903 | afinfo = xfrm_state_afinfo[family]; | |
546be240 HX |
1904 | if (unlikely(!afinfo)) |
1905 | read_unlock(&xfrm_state_afinfo_lock); | |
1da177e4 LT |
1906 | return afinfo; |
1907 | } | |
1908 | ||
17c2a42a | 1909 | static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo) |
9a429c49 | 1910 | __releases(xfrm_state_afinfo_lock) |
1da177e4 | 1911 | { |
546be240 | 1912 | read_unlock(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1913 | } |
1914 | ||
1915 | /* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */ | |
1916 | void xfrm_state_delete_tunnel(struct xfrm_state *x) | |
1917 | { | |
1918 | if (x->tunnel) { | |
1919 | struct xfrm_state *t = x->tunnel; | |
1920 | ||
1921 | if (atomic_read(&t->tunnel_users) == 2) | |
1922 | xfrm_state_delete(t); | |
1923 | atomic_dec(&t->tunnel_users); | |
1924 | xfrm_state_put(t); | |
1925 | x->tunnel = NULL; | |
1926 | } | |
1927 | } | |
1928 | EXPORT_SYMBOL(xfrm_state_delete_tunnel); | |
1929 | ||
1930 | int xfrm_state_mtu(struct xfrm_state *x, int mtu) | |
1931 | { | |
c5c25238 | 1932 | int res; |
1da177e4 | 1933 | |
c5c25238 PM |
1934 | spin_lock_bh(&x->lock); |
1935 | if (x->km.state == XFRM_STATE_VALID && | |
1936 | x->type && x->type->get_mtu) | |
1937 | res = x->type->get_mtu(x, mtu); | |
1938 | else | |
28121617 | 1939 | res = mtu - x->props.header_len; |
c5c25238 | 1940 | spin_unlock_bh(&x->lock); |
1da177e4 LT |
1941 | return res; |
1942 | } | |
1943 | ||
72cb6962 HX |
1944 | int xfrm_init_state(struct xfrm_state *x) |
1945 | { | |
d094cd83 HX |
1946 | struct xfrm_state_afinfo *afinfo; |
1947 | int family = x->props.family; | |
72cb6962 HX |
1948 | int err; |
1949 | ||
d094cd83 HX |
1950 | err = -EAFNOSUPPORT; |
1951 | afinfo = xfrm_state_get_afinfo(family); | |
1952 | if (!afinfo) | |
1953 | goto error; | |
1954 | ||
1955 | err = 0; | |
1956 | if (afinfo->init_flags) | |
1957 | err = afinfo->init_flags(x); | |
1958 | ||
1959 | xfrm_state_put_afinfo(afinfo); | |
1960 | ||
1961 | if (err) | |
1962 | goto error; | |
1963 | ||
1964 | err = -EPROTONOSUPPORT; | |
13996378 HX |
1965 | x->inner_mode = xfrm_get_mode(x->props.mode, x->sel.family); |
1966 | if (x->inner_mode == NULL) | |
1967 | goto error; | |
1968 | ||
1969 | if (!(x->inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) && | |
1970 | family != x->sel.family) | |
1971 | goto error; | |
1972 | ||
d094cd83 | 1973 | x->type = xfrm_get_type(x->id.proto, family); |
72cb6962 HX |
1974 | if (x->type == NULL) |
1975 | goto error; | |
1976 | ||
1977 | err = x->type->init_state(x); | |
1978 | if (err) | |
1979 | goto error; | |
1980 | ||
13996378 HX |
1981 | x->outer_mode = xfrm_get_mode(x->props.mode, family); |
1982 | if (x->outer_mode == NULL) | |
b59f45d0 HX |
1983 | goto error; |
1984 | ||
72cb6962 HX |
1985 | x->km.state = XFRM_STATE_VALID; |
1986 | ||
1987 | error: | |
1988 | return err; | |
1989 | } | |
1990 | ||
1991 | EXPORT_SYMBOL(xfrm_init_state); | |
a716c119 | 1992 | |
1da177e4 LT |
1993 | void __init xfrm_state_init(void) |
1994 | { | |
f034b5d4 DM |
1995 | unsigned int sz; |
1996 | ||
1997 | sz = sizeof(struct hlist_head) * 8; | |
1998 | ||
44e36b42 DM |
1999 | xfrm_state_bydst = xfrm_hash_alloc(sz); |
2000 | xfrm_state_bysrc = xfrm_hash_alloc(sz); | |
2001 | xfrm_state_byspi = xfrm_hash_alloc(sz); | |
f034b5d4 DM |
2002 | if (!xfrm_state_bydst || !xfrm_state_bysrc || !xfrm_state_byspi) |
2003 | panic("XFRM: Cannot allocate bydst/bysrc/byspi hashes."); | |
2004 | xfrm_state_hmask = ((sz / sizeof(struct hlist_head)) - 1); | |
1da177e4 | 2005 | |
c4028958 | 2006 | INIT_WORK(&xfrm_state_gc_work, xfrm_state_gc_task); |
1da177e4 LT |
2007 | } |
2008 | ||
ab5f5e8b | 2009 | #ifdef CONFIG_AUDITSYSCALL |
cf35f43e IJ |
2010 | static void xfrm_audit_helper_sainfo(struct xfrm_state *x, |
2011 | struct audit_buffer *audit_buf) | |
ab5f5e8b | 2012 | { |
68277acc PM |
2013 | struct xfrm_sec_ctx *ctx = x->security; |
2014 | u32 spi = ntohl(x->id.spi); | |
2015 | ||
2016 | if (ctx) | |
ab5f5e8b | 2017 | audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s", |
68277acc | 2018 | ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str); |
ab5f5e8b JL |
2019 | |
2020 | switch(x->props.family) { | |
2021 | case AF_INET: | |
68277acc PM |
2022 | audit_log_format(audit_buf, |
2023 | " src=" NIPQUAD_FMT " dst=" NIPQUAD_FMT, | |
ab5f5e8b JL |
2024 | NIPQUAD(x->props.saddr.a4), |
2025 | NIPQUAD(x->id.daddr.a4)); | |
2026 | break; | |
2027 | case AF_INET6: | |
68277acc PM |
2028 | audit_log_format(audit_buf, |
2029 | " src=" NIP6_FMT " dst=" NIP6_FMT, | |
2030 | NIP6(*(struct in6_addr *)x->props.saddr.a6), | |
2031 | NIP6(*(struct in6_addr *)x->id.daddr.a6)); | |
ab5f5e8b JL |
2032 | break; |
2033 | } | |
68277acc PM |
2034 | |
2035 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
ab5f5e8b JL |
2036 | } |
2037 | ||
cf35f43e IJ |
2038 | static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family, |
2039 | struct audit_buffer *audit_buf) | |
afeb14b4 PM |
2040 | { |
2041 | struct iphdr *iph4; | |
2042 | struct ipv6hdr *iph6; | |
2043 | ||
2044 | switch (family) { | |
2045 | case AF_INET: | |
2046 | iph4 = ip_hdr(skb); | |
2047 | audit_log_format(audit_buf, | |
2048 | " src=" NIPQUAD_FMT " dst=" NIPQUAD_FMT, | |
2049 | NIPQUAD(iph4->saddr), | |
2050 | NIPQUAD(iph4->daddr)); | |
2051 | break; | |
2052 | case AF_INET6: | |
2053 | iph6 = ipv6_hdr(skb); | |
2054 | audit_log_format(audit_buf, | |
2055 | " src=" NIP6_FMT " dst=" NIP6_FMT | |
2056 | " flowlbl=0x%x%x%x", | |
2057 | NIP6(iph6->saddr), | |
2058 | NIP6(iph6->daddr), | |
2059 | iph6->flow_lbl[0] & 0x0f, | |
2060 | iph6->flow_lbl[1], | |
2061 | iph6->flow_lbl[2]); | |
2062 | break; | |
2063 | } | |
2064 | } | |
2065 | ||
68277acc PM |
2066 | void xfrm_audit_state_add(struct xfrm_state *x, int result, |
2067 | u32 auid, u32 secid) | |
ab5f5e8b JL |
2068 | { |
2069 | struct audit_buffer *audit_buf; | |
ab5f5e8b | 2070 | |
afeb14b4 | 2071 | audit_buf = xfrm_audit_start("SAD-add"); |
ab5f5e8b JL |
2072 | if (audit_buf == NULL) |
2073 | return; | |
afeb14b4 PM |
2074 | xfrm_audit_helper_usrinfo(auid, secid, audit_buf); |
2075 | xfrm_audit_helper_sainfo(x, audit_buf); | |
2076 | audit_log_format(audit_buf, " res=%u", result); | |
ab5f5e8b JL |
2077 | audit_log_end(audit_buf); |
2078 | } | |
2079 | EXPORT_SYMBOL_GPL(xfrm_audit_state_add); | |
2080 | ||
68277acc PM |
2081 | void xfrm_audit_state_delete(struct xfrm_state *x, int result, |
2082 | u32 auid, u32 secid) | |
ab5f5e8b JL |
2083 | { |
2084 | struct audit_buffer *audit_buf; | |
ab5f5e8b | 2085 | |
afeb14b4 | 2086 | audit_buf = xfrm_audit_start("SAD-delete"); |
ab5f5e8b JL |
2087 | if (audit_buf == NULL) |
2088 | return; | |
afeb14b4 PM |
2089 | xfrm_audit_helper_usrinfo(auid, secid, audit_buf); |
2090 | xfrm_audit_helper_sainfo(x, audit_buf); | |
2091 | audit_log_format(audit_buf, " res=%u", result); | |
ab5f5e8b JL |
2092 | audit_log_end(audit_buf); |
2093 | } | |
2094 | EXPORT_SYMBOL_GPL(xfrm_audit_state_delete); | |
afeb14b4 PM |
2095 | |
2096 | void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
2097 | struct sk_buff *skb) | |
2098 | { | |
2099 | struct audit_buffer *audit_buf; | |
2100 | u32 spi; | |
2101 | ||
2102 | audit_buf = xfrm_audit_start("SA-replay-overflow"); | |
2103 | if (audit_buf == NULL) | |
2104 | return; | |
2105 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2106 | /* don't record the sequence number because it's inherent in this kind | |
2107 | * of audit message */ | |
2108 | spi = ntohl(x->id.spi); | |
2109 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
2110 | audit_log_end(audit_buf); | |
2111 | } | |
2112 | EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow); | |
2113 | ||
2114 | static void xfrm_audit_state_replay(struct xfrm_state *x, | |
2115 | struct sk_buff *skb, __be32 net_seq) | |
2116 | { | |
2117 | struct audit_buffer *audit_buf; | |
2118 | u32 spi; | |
2119 | ||
2120 | audit_buf = xfrm_audit_start("SA-replayed-pkt"); | |
2121 | if (audit_buf == NULL) | |
2122 | return; | |
2123 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2124 | spi = ntohl(x->id.spi); | |
2125 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2126 | spi, spi, ntohl(net_seq)); | |
2127 | audit_log_end(audit_buf); | |
2128 | } | |
2129 | ||
2130 | void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family) | |
2131 | { | |
2132 | struct audit_buffer *audit_buf; | |
2133 | ||
2134 | audit_buf = xfrm_audit_start("SA-notfound"); | |
2135 | if (audit_buf == NULL) | |
2136 | return; | |
2137 | xfrm_audit_helper_pktinfo(skb, family, audit_buf); | |
2138 | audit_log_end(audit_buf); | |
2139 | } | |
2140 | EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple); | |
2141 | ||
2142 | void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
2143 | __be32 net_spi, __be32 net_seq) | |
2144 | { | |
2145 | struct audit_buffer *audit_buf; | |
2146 | u32 spi; | |
2147 | ||
2148 | audit_buf = xfrm_audit_start("SA-notfound"); | |
2149 | if (audit_buf == NULL) | |
2150 | return; | |
2151 | xfrm_audit_helper_pktinfo(skb, family, audit_buf); | |
2152 | spi = ntohl(net_spi); | |
2153 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2154 | spi, spi, ntohl(net_seq)); | |
2155 | audit_log_end(audit_buf); | |
2156 | } | |
2157 | EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound); | |
2158 | ||
2159 | void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
2160 | struct sk_buff *skb, u8 proto) | |
2161 | { | |
2162 | struct audit_buffer *audit_buf; | |
2163 | __be32 net_spi; | |
2164 | __be32 net_seq; | |
2165 | ||
2166 | audit_buf = xfrm_audit_start("SA-icv-failure"); | |
2167 | if (audit_buf == NULL) | |
2168 | return; | |
2169 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2170 | if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) { | |
2171 | u32 spi = ntohl(net_spi); | |
2172 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2173 | spi, spi, ntohl(net_seq)); | |
2174 | } | |
2175 | audit_log_end(audit_buf); | |
2176 | } | |
2177 | EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail); | |
ab5f5e8b | 2178 | #endif /* CONFIG_AUDITSYSCALL */ |