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 | */ | |
4c563f76 | 53 | static LIST_HEAD(xfrm_state_all); |
f034b5d4 DM |
54 | static struct hlist_head *xfrm_state_bydst __read_mostly; |
55 | static struct hlist_head *xfrm_state_bysrc __read_mostly; | |
56 | static struct hlist_head *xfrm_state_byspi __read_mostly; | |
57 | static unsigned int xfrm_state_hmask __read_mostly; | |
58 | static unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024; | |
59 | static unsigned int xfrm_state_num; | |
9d4a706d | 60 | static unsigned int xfrm_state_genid; |
f034b5d4 | 61 | |
17c2a42a HX |
62 | static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family); |
63 | static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo); | |
64 | ||
afeb14b4 PM |
65 | #ifdef CONFIG_AUDITSYSCALL |
66 | static void xfrm_audit_state_replay(struct xfrm_state *x, | |
67 | struct sk_buff *skb, __be32 net_seq); | |
68 | #else | |
69 | #define xfrm_audit_state_replay(x, s, sq) do { ; } while (0) | |
70 | #endif /* CONFIG_AUDITSYSCALL */ | |
71 | ||
c1969f29 DM |
72 | static inline unsigned int xfrm_dst_hash(xfrm_address_t *daddr, |
73 | xfrm_address_t *saddr, | |
74 | u32 reqid, | |
a624c108 | 75 | unsigned short family) |
f034b5d4 | 76 | { |
c1969f29 | 77 | return __xfrm_dst_hash(daddr, saddr, reqid, family, xfrm_state_hmask); |
f034b5d4 DM |
78 | } |
79 | ||
667bbcb6 MN |
80 | static inline unsigned int xfrm_src_hash(xfrm_address_t *daddr, |
81 | xfrm_address_t *saddr, | |
44e36b42 | 82 | unsigned short family) |
f034b5d4 | 83 | { |
667bbcb6 | 84 | return __xfrm_src_hash(daddr, saddr, family, xfrm_state_hmask); |
f034b5d4 DM |
85 | } |
86 | ||
f034b5d4 | 87 | static inline unsigned int |
8122adf0 | 88 | xfrm_spi_hash(xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family) |
f034b5d4 | 89 | { |
c1969f29 | 90 | return __xfrm_spi_hash(daddr, spi, proto, family, xfrm_state_hmask); |
f034b5d4 DM |
91 | } |
92 | ||
f034b5d4 DM |
93 | static void xfrm_hash_transfer(struct hlist_head *list, |
94 | struct hlist_head *ndsttable, | |
95 | struct hlist_head *nsrctable, | |
96 | struct hlist_head *nspitable, | |
97 | unsigned int nhashmask) | |
98 | { | |
99 | struct hlist_node *entry, *tmp; | |
100 | struct xfrm_state *x; | |
101 | ||
102 | hlist_for_each_entry_safe(x, entry, tmp, list, bydst) { | |
103 | unsigned int h; | |
104 | ||
c1969f29 DM |
105 | h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr, |
106 | x->props.reqid, x->props.family, | |
107 | nhashmask); | |
f034b5d4 DM |
108 | hlist_add_head(&x->bydst, ndsttable+h); |
109 | ||
667bbcb6 MN |
110 | h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr, |
111 | x->props.family, | |
f034b5d4 DM |
112 | nhashmask); |
113 | hlist_add_head(&x->bysrc, nsrctable+h); | |
114 | ||
7b4dc360 MN |
115 | if (x->id.spi) { |
116 | h = __xfrm_spi_hash(&x->id.daddr, x->id.spi, | |
117 | x->id.proto, x->props.family, | |
118 | nhashmask); | |
119 | hlist_add_head(&x->byspi, nspitable+h); | |
120 | } | |
f034b5d4 DM |
121 | } |
122 | } | |
123 | ||
124 | static unsigned long xfrm_hash_new_size(void) | |
125 | { | |
126 | return ((xfrm_state_hmask + 1) << 1) * | |
127 | sizeof(struct hlist_head); | |
128 | } | |
129 | ||
130 | static DEFINE_MUTEX(hash_resize_mutex); | |
131 | ||
c4028958 | 132 | static void xfrm_hash_resize(struct work_struct *__unused) |
f034b5d4 DM |
133 | { |
134 | struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi; | |
135 | unsigned long nsize, osize; | |
136 | unsigned int nhashmask, ohashmask; | |
137 | int i; | |
138 | ||
139 | mutex_lock(&hash_resize_mutex); | |
140 | ||
141 | nsize = xfrm_hash_new_size(); | |
44e36b42 | 142 | ndst = xfrm_hash_alloc(nsize); |
f034b5d4 DM |
143 | if (!ndst) |
144 | goto out_unlock; | |
44e36b42 | 145 | nsrc = xfrm_hash_alloc(nsize); |
f034b5d4 | 146 | if (!nsrc) { |
44e36b42 | 147 | xfrm_hash_free(ndst, nsize); |
f034b5d4 DM |
148 | goto out_unlock; |
149 | } | |
44e36b42 | 150 | nspi = xfrm_hash_alloc(nsize); |
f034b5d4 | 151 | if (!nspi) { |
44e36b42 DM |
152 | xfrm_hash_free(ndst, nsize); |
153 | xfrm_hash_free(nsrc, nsize); | |
f034b5d4 DM |
154 | goto out_unlock; |
155 | } | |
156 | ||
157 | spin_lock_bh(&xfrm_state_lock); | |
158 | ||
159 | nhashmask = (nsize / sizeof(struct hlist_head)) - 1U; | |
160 | for (i = xfrm_state_hmask; i >= 0; i--) | |
161 | xfrm_hash_transfer(xfrm_state_bydst+i, ndst, nsrc, nspi, | |
162 | nhashmask); | |
163 | ||
164 | odst = xfrm_state_bydst; | |
165 | osrc = xfrm_state_bysrc; | |
166 | ospi = xfrm_state_byspi; | |
167 | ohashmask = xfrm_state_hmask; | |
168 | ||
169 | xfrm_state_bydst = ndst; | |
170 | xfrm_state_bysrc = nsrc; | |
171 | xfrm_state_byspi = nspi; | |
172 | xfrm_state_hmask = nhashmask; | |
173 | ||
174 | spin_unlock_bh(&xfrm_state_lock); | |
175 | ||
176 | osize = (ohashmask + 1) * sizeof(struct hlist_head); | |
44e36b42 DM |
177 | xfrm_hash_free(odst, osize); |
178 | xfrm_hash_free(osrc, osize); | |
179 | xfrm_hash_free(ospi, osize); | |
f034b5d4 DM |
180 | |
181 | out_unlock: | |
182 | mutex_unlock(&hash_resize_mutex); | |
183 | } | |
184 | ||
c4028958 | 185 | static DECLARE_WORK(xfrm_hash_work, xfrm_hash_resize); |
f034b5d4 | 186 | |
1da177e4 LT |
187 | DECLARE_WAIT_QUEUE_HEAD(km_waitq); |
188 | EXPORT_SYMBOL(km_waitq); | |
189 | ||
190 | static DEFINE_RWLOCK(xfrm_state_afinfo_lock); | |
191 | static struct xfrm_state_afinfo *xfrm_state_afinfo[NPROTO]; | |
192 | ||
193 | static struct work_struct xfrm_state_gc_work; | |
8f126e37 | 194 | static HLIST_HEAD(xfrm_state_gc_list); |
1da177e4 LT |
195 | static DEFINE_SPINLOCK(xfrm_state_gc_lock); |
196 | ||
53bc6b4d | 197 | int __xfrm_state_delete(struct xfrm_state *x); |
1da177e4 | 198 | |
980ebd25 | 199 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); |
53bc6b4d | 200 | void km_state_expired(struct xfrm_state *x, int hard, u32 pid); |
1da177e4 | 201 | |
aa5d62cc HX |
202 | static struct xfrm_state_afinfo *xfrm_state_lock_afinfo(unsigned int family) |
203 | { | |
204 | struct xfrm_state_afinfo *afinfo; | |
205 | if (unlikely(family >= NPROTO)) | |
206 | return NULL; | |
207 | write_lock_bh(&xfrm_state_afinfo_lock); | |
208 | afinfo = xfrm_state_afinfo[family]; | |
209 | if (unlikely(!afinfo)) | |
210 | write_unlock_bh(&xfrm_state_afinfo_lock); | |
211 | return afinfo; | |
212 | } | |
213 | ||
214 | static void xfrm_state_unlock_afinfo(struct xfrm_state_afinfo *afinfo) | |
9a429c49 | 215 | __releases(xfrm_state_afinfo_lock) |
aa5d62cc HX |
216 | { |
217 | write_unlock_bh(&xfrm_state_afinfo_lock); | |
218 | } | |
219 | ||
533cb5b0 | 220 | int xfrm_register_type(const struct xfrm_type *type, unsigned short family) |
aa5d62cc HX |
221 | { |
222 | struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family); | |
533cb5b0 | 223 | const struct xfrm_type **typemap; |
aa5d62cc HX |
224 | int err = 0; |
225 | ||
226 | if (unlikely(afinfo == NULL)) | |
227 | return -EAFNOSUPPORT; | |
228 | typemap = afinfo->type_map; | |
229 | ||
230 | if (likely(typemap[type->proto] == NULL)) | |
231 | typemap[type->proto] = type; | |
232 | else | |
233 | err = -EEXIST; | |
234 | xfrm_state_unlock_afinfo(afinfo); | |
235 | return err; | |
236 | } | |
237 | EXPORT_SYMBOL(xfrm_register_type); | |
238 | ||
533cb5b0 | 239 | int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family) |
aa5d62cc HX |
240 | { |
241 | struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family); | |
533cb5b0 | 242 | const struct xfrm_type **typemap; |
aa5d62cc HX |
243 | int err = 0; |
244 | ||
245 | if (unlikely(afinfo == NULL)) | |
246 | return -EAFNOSUPPORT; | |
247 | typemap = afinfo->type_map; | |
248 | ||
249 | if (unlikely(typemap[type->proto] != type)) | |
250 | err = -ENOENT; | |
251 | else | |
252 | typemap[type->proto] = NULL; | |
253 | xfrm_state_unlock_afinfo(afinfo); | |
254 | return err; | |
255 | } | |
256 | EXPORT_SYMBOL(xfrm_unregister_type); | |
257 | ||
533cb5b0 | 258 | static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family) |
aa5d62cc HX |
259 | { |
260 | struct xfrm_state_afinfo *afinfo; | |
533cb5b0 ED |
261 | const struct xfrm_type **typemap; |
262 | const struct xfrm_type *type; | |
aa5d62cc HX |
263 | int modload_attempted = 0; |
264 | ||
265 | retry: | |
266 | afinfo = xfrm_state_get_afinfo(family); | |
267 | if (unlikely(afinfo == NULL)) | |
268 | return NULL; | |
269 | typemap = afinfo->type_map; | |
270 | ||
271 | type = typemap[proto]; | |
272 | if (unlikely(type && !try_module_get(type->owner))) | |
273 | type = NULL; | |
274 | if (!type && !modload_attempted) { | |
275 | xfrm_state_put_afinfo(afinfo); | |
276 | request_module("xfrm-type-%d-%d", family, proto); | |
277 | modload_attempted = 1; | |
278 | goto retry; | |
279 | } | |
280 | ||
281 | xfrm_state_put_afinfo(afinfo); | |
282 | return type; | |
283 | } | |
284 | ||
533cb5b0 | 285 | static void xfrm_put_type(const struct xfrm_type *type) |
aa5d62cc HX |
286 | { |
287 | module_put(type->owner); | |
288 | } | |
289 | ||
290 | int xfrm_register_mode(struct xfrm_mode *mode, int family) | |
291 | { | |
292 | struct xfrm_state_afinfo *afinfo; | |
293 | struct xfrm_mode **modemap; | |
294 | int err; | |
295 | ||
296 | if (unlikely(mode->encap >= XFRM_MODE_MAX)) | |
297 | return -EINVAL; | |
298 | ||
299 | afinfo = xfrm_state_lock_afinfo(family); | |
300 | if (unlikely(afinfo == NULL)) | |
301 | return -EAFNOSUPPORT; | |
302 | ||
303 | err = -EEXIST; | |
304 | modemap = afinfo->mode_map; | |
17c2a42a HX |
305 | if (modemap[mode->encap]) |
306 | goto out; | |
aa5d62cc | 307 | |
17c2a42a HX |
308 | err = -ENOENT; |
309 | if (!try_module_get(afinfo->owner)) | |
310 | goto out; | |
311 | ||
312 | mode->afinfo = afinfo; | |
313 | modemap[mode->encap] = mode; | |
314 | err = 0; | |
315 | ||
316 | out: | |
aa5d62cc HX |
317 | xfrm_state_unlock_afinfo(afinfo); |
318 | return err; | |
319 | } | |
320 | EXPORT_SYMBOL(xfrm_register_mode); | |
321 | ||
322 | int xfrm_unregister_mode(struct xfrm_mode *mode, int family) | |
323 | { | |
324 | struct xfrm_state_afinfo *afinfo; | |
325 | struct xfrm_mode **modemap; | |
326 | int err; | |
327 | ||
328 | if (unlikely(mode->encap >= XFRM_MODE_MAX)) | |
329 | return -EINVAL; | |
330 | ||
331 | afinfo = xfrm_state_lock_afinfo(family); | |
332 | if (unlikely(afinfo == NULL)) | |
333 | return -EAFNOSUPPORT; | |
334 | ||
335 | err = -ENOENT; | |
336 | modemap = afinfo->mode_map; | |
337 | if (likely(modemap[mode->encap] == mode)) { | |
338 | modemap[mode->encap] = NULL; | |
17c2a42a | 339 | module_put(mode->afinfo->owner); |
aa5d62cc HX |
340 | err = 0; |
341 | } | |
342 | ||
343 | xfrm_state_unlock_afinfo(afinfo); | |
344 | return err; | |
345 | } | |
346 | EXPORT_SYMBOL(xfrm_unregister_mode); | |
347 | ||
348 | static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family) | |
349 | { | |
350 | struct xfrm_state_afinfo *afinfo; | |
351 | struct xfrm_mode *mode; | |
352 | int modload_attempted = 0; | |
353 | ||
354 | if (unlikely(encap >= XFRM_MODE_MAX)) | |
355 | return NULL; | |
356 | ||
357 | retry: | |
358 | afinfo = xfrm_state_get_afinfo(family); | |
359 | if (unlikely(afinfo == NULL)) | |
360 | return NULL; | |
361 | ||
362 | mode = afinfo->mode_map[encap]; | |
363 | if (unlikely(mode && !try_module_get(mode->owner))) | |
364 | mode = NULL; | |
365 | if (!mode && !modload_attempted) { | |
366 | xfrm_state_put_afinfo(afinfo); | |
367 | request_module("xfrm-mode-%d-%d", family, encap); | |
368 | modload_attempted = 1; | |
369 | goto retry; | |
370 | } | |
371 | ||
372 | xfrm_state_put_afinfo(afinfo); | |
373 | return mode; | |
374 | } | |
375 | ||
376 | static void xfrm_put_mode(struct xfrm_mode *mode) | |
377 | { | |
378 | module_put(mode->owner); | |
379 | } | |
380 | ||
1da177e4 LT |
381 | static void xfrm_state_gc_destroy(struct xfrm_state *x) |
382 | { | |
a47f0ce0 DM |
383 | del_timer_sync(&x->timer); |
384 | del_timer_sync(&x->rtimer); | |
a51482bd JJ |
385 | kfree(x->aalg); |
386 | kfree(x->ealg); | |
387 | kfree(x->calg); | |
388 | kfree(x->encap); | |
060f02a3 | 389 | kfree(x->coaddr); |
13996378 HX |
390 | if (x->inner_mode) |
391 | xfrm_put_mode(x->inner_mode); | |
392 | if (x->outer_mode) | |
393 | xfrm_put_mode(x->outer_mode); | |
1da177e4 LT |
394 | if (x->type) { |
395 | x->type->destructor(x); | |
396 | xfrm_put_type(x->type); | |
397 | } | |
df71837d | 398 | security_xfrm_state_free(x); |
1da177e4 LT |
399 | kfree(x); |
400 | } | |
401 | ||
c4028958 | 402 | static void xfrm_state_gc_task(struct work_struct *data) |
1da177e4 LT |
403 | { |
404 | struct xfrm_state *x; | |
8f126e37 DM |
405 | struct hlist_node *entry, *tmp; |
406 | struct hlist_head gc_list; | |
1da177e4 | 407 | |
1da177e4 | 408 | spin_lock_bh(&xfrm_state_gc_lock); |
8f126e37 DM |
409 | gc_list.first = xfrm_state_gc_list.first; |
410 | INIT_HLIST_HEAD(&xfrm_state_gc_list); | |
1da177e4 LT |
411 | spin_unlock_bh(&xfrm_state_gc_lock); |
412 | ||
8f126e37 | 413 | hlist_for_each_entry_safe(x, entry, tmp, &gc_list, bydst) |
1da177e4 | 414 | xfrm_state_gc_destroy(x); |
8f126e37 | 415 | |
1da177e4 LT |
416 | wake_up(&km_waitq); |
417 | } | |
418 | ||
419 | static inline unsigned long make_jiffies(long secs) | |
420 | { | |
421 | if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ) | |
422 | return MAX_SCHEDULE_TIMEOUT-1; | |
423 | else | |
a716c119 | 424 | return secs*HZ; |
1da177e4 LT |
425 | } |
426 | ||
427 | static void xfrm_timer_handler(unsigned long data) | |
428 | { | |
429 | struct xfrm_state *x = (struct xfrm_state*)data; | |
9d729f72 | 430 | unsigned long now = get_seconds(); |
1da177e4 LT |
431 | long next = LONG_MAX; |
432 | int warn = 0; | |
161a09e7 | 433 | int err = 0; |
1da177e4 LT |
434 | |
435 | spin_lock(&x->lock); | |
436 | if (x->km.state == XFRM_STATE_DEAD) | |
437 | goto out; | |
438 | if (x->km.state == XFRM_STATE_EXPIRED) | |
439 | goto expired; | |
440 | if (x->lft.hard_add_expires_seconds) { | |
441 | long tmo = x->lft.hard_add_expires_seconds + | |
442 | x->curlft.add_time - now; | |
443 | if (tmo <= 0) | |
444 | goto expired; | |
445 | if (tmo < next) | |
446 | next = tmo; | |
447 | } | |
448 | if (x->lft.hard_use_expires_seconds) { | |
449 | long tmo = x->lft.hard_use_expires_seconds + | |
450 | (x->curlft.use_time ? : now) - now; | |
451 | if (tmo <= 0) | |
452 | goto expired; | |
453 | if (tmo < next) | |
454 | next = tmo; | |
455 | } | |
456 | if (x->km.dying) | |
457 | goto resched; | |
458 | if (x->lft.soft_add_expires_seconds) { | |
459 | long tmo = x->lft.soft_add_expires_seconds + | |
460 | x->curlft.add_time - now; | |
461 | if (tmo <= 0) | |
462 | warn = 1; | |
463 | else if (tmo < next) | |
464 | next = tmo; | |
465 | } | |
466 | if (x->lft.soft_use_expires_seconds) { | |
467 | long tmo = x->lft.soft_use_expires_seconds + | |
468 | (x->curlft.use_time ? : now) - now; | |
469 | if (tmo <= 0) | |
470 | warn = 1; | |
471 | else if (tmo < next) | |
472 | next = tmo; | |
473 | } | |
474 | ||
4666faab | 475 | x->km.dying = warn; |
1da177e4 | 476 | if (warn) |
53bc6b4d | 477 | km_state_expired(x, 0, 0); |
1da177e4 | 478 | resched: |
a47f0ce0 DM |
479 | if (next != LONG_MAX) |
480 | mod_timer(&x->timer, jiffies + make_jiffies(next)); | |
481 | ||
1da177e4 LT |
482 | goto out; |
483 | ||
484 | expired: | |
485 | if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) { | |
486 | x->km.state = XFRM_STATE_EXPIRED; | |
487 | wake_up(&km_waitq); | |
488 | next = 2; | |
489 | goto resched; | |
490 | } | |
161a09e7 JL |
491 | |
492 | err = __xfrm_state_delete(x); | |
493 | if (!err && x->id.spi) | |
53bc6b4d | 494 | km_state_expired(x, 1, 0); |
1da177e4 | 495 | |
ab5f5e8b | 496 | xfrm_audit_state_delete(x, err ? 0 : 1, |
0c11b942 | 497 | audit_get_loginuid(current), 0); |
161a09e7 | 498 | |
1da177e4 LT |
499 | out: |
500 | spin_unlock(&x->lock); | |
1da177e4 LT |
501 | } |
502 | ||
0ac84752 DM |
503 | static void xfrm_replay_timer_handler(unsigned long data); |
504 | ||
1da177e4 LT |
505 | struct xfrm_state *xfrm_state_alloc(void) |
506 | { | |
507 | struct xfrm_state *x; | |
508 | ||
0da974f4 | 509 | x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC); |
1da177e4 LT |
510 | |
511 | if (x) { | |
1da177e4 LT |
512 | atomic_set(&x->refcnt, 1); |
513 | atomic_set(&x->tunnel_users, 0); | |
4c563f76 | 514 | INIT_LIST_HEAD(&x->all); |
8f126e37 DM |
515 | INIT_HLIST_NODE(&x->bydst); |
516 | INIT_HLIST_NODE(&x->bysrc); | |
517 | INIT_HLIST_NODE(&x->byspi); | |
b24b8a24 PE |
518 | setup_timer(&x->timer, xfrm_timer_handler, (unsigned long)x); |
519 | setup_timer(&x->rtimer, xfrm_replay_timer_handler, | |
520 | (unsigned long)x); | |
9d729f72 | 521 | x->curlft.add_time = get_seconds(); |
1da177e4 LT |
522 | x->lft.soft_byte_limit = XFRM_INF; |
523 | x->lft.soft_packet_limit = XFRM_INF; | |
524 | x->lft.hard_byte_limit = XFRM_INF; | |
525 | x->lft.hard_packet_limit = XFRM_INF; | |
f8cd5488 JHS |
526 | x->replay_maxage = 0; |
527 | x->replay_maxdiff = 0; | |
1da177e4 LT |
528 | spin_lock_init(&x->lock); |
529 | } | |
530 | return x; | |
531 | } | |
532 | EXPORT_SYMBOL(xfrm_state_alloc); | |
533 | ||
534 | void __xfrm_state_destroy(struct xfrm_state *x) | |
535 | { | |
536 | BUG_TRAP(x->km.state == XFRM_STATE_DEAD); | |
537 | ||
4c563f76 TT |
538 | spin_lock_bh(&xfrm_state_lock); |
539 | list_del(&x->all); | |
540 | spin_unlock_bh(&xfrm_state_lock); | |
541 | ||
1da177e4 | 542 | spin_lock_bh(&xfrm_state_gc_lock); |
8f126e37 | 543 | hlist_add_head(&x->bydst, &xfrm_state_gc_list); |
1da177e4 LT |
544 | spin_unlock_bh(&xfrm_state_gc_lock); |
545 | schedule_work(&xfrm_state_gc_work); | |
546 | } | |
547 | EXPORT_SYMBOL(__xfrm_state_destroy); | |
548 | ||
53bc6b4d | 549 | int __xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 550 | { |
26b15dad JHS |
551 | int err = -ESRCH; |
552 | ||
1da177e4 LT |
553 | if (x->km.state != XFRM_STATE_DEAD) { |
554 | x->km.state = XFRM_STATE_DEAD; | |
555 | spin_lock(&xfrm_state_lock); | |
8f126e37 | 556 | hlist_del(&x->bydst); |
8f126e37 | 557 | hlist_del(&x->bysrc); |
a47f0ce0 | 558 | if (x->id.spi) |
8f126e37 | 559 | hlist_del(&x->byspi); |
f034b5d4 | 560 | xfrm_state_num--; |
1da177e4 | 561 | spin_unlock(&xfrm_state_lock); |
1da177e4 | 562 | |
1da177e4 LT |
563 | /* All xfrm_state objects are created by xfrm_state_alloc. |
564 | * The xfrm_state_alloc call gives a reference, and that | |
565 | * is what we are dropping here. | |
566 | */ | |
5dba4797 | 567 | xfrm_state_put(x); |
26b15dad | 568 | err = 0; |
1da177e4 | 569 | } |
26b15dad JHS |
570 | |
571 | return err; | |
1da177e4 | 572 | } |
53bc6b4d | 573 | EXPORT_SYMBOL(__xfrm_state_delete); |
1da177e4 | 574 | |
26b15dad | 575 | int xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 576 | { |
26b15dad JHS |
577 | int err; |
578 | ||
1da177e4 | 579 | spin_lock_bh(&x->lock); |
26b15dad | 580 | err = __xfrm_state_delete(x); |
1da177e4 | 581 | spin_unlock_bh(&x->lock); |
26b15dad JHS |
582 | |
583 | return err; | |
1da177e4 LT |
584 | } |
585 | EXPORT_SYMBOL(xfrm_state_delete); | |
586 | ||
4aa2e62c JL |
587 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
588 | static inline int | |
589 | xfrm_state_flush_secctx_check(u8 proto, struct xfrm_audit *audit_info) | |
1da177e4 | 590 | { |
4aa2e62c JL |
591 | int i, err = 0; |
592 | ||
593 | for (i = 0; i <= xfrm_state_hmask; i++) { | |
594 | struct hlist_node *entry; | |
595 | struct xfrm_state *x; | |
596 | ||
597 | hlist_for_each_entry(x, entry, xfrm_state_bydst+i, bydst) { | |
598 | if (xfrm_id_proto_match(x->id.proto, proto) && | |
599 | (err = security_xfrm_state_delete(x)) != 0) { | |
ab5f5e8b JL |
600 | xfrm_audit_state_delete(x, 0, |
601 | audit_info->loginuid, | |
602 | audit_info->secid); | |
4aa2e62c JL |
603 | return err; |
604 | } | |
605 | } | |
606 | } | |
607 | ||
608 | return err; | |
609 | } | |
610 | #else | |
611 | static inline int | |
612 | xfrm_state_flush_secctx_check(u8 proto, struct xfrm_audit *audit_info) | |
613 | { | |
614 | return 0; | |
615 | } | |
616 | #endif | |
617 | ||
618 | int xfrm_state_flush(u8 proto, struct xfrm_audit *audit_info) | |
619 | { | |
620 | int i, err = 0; | |
1da177e4 LT |
621 | |
622 | spin_lock_bh(&xfrm_state_lock); | |
4aa2e62c JL |
623 | err = xfrm_state_flush_secctx_check(proto, audit_info); |
624 | if (err) | |
625 | goto out; | |
626 | ||
a9917c06 | 627 | for (i = 0; i <= xfrm_state_hmask; i++) { |
8f126e37 DM |
628 | struct hlist_node *entry; |
629 | struct xfrm_state *x; | |
1da177e4 | 630 | restart: |
8f126e37 | 631 | hlist_for_each_entry(x, entry, xfrm_state_bydst+i, bydst) { |
1da177e4 | 632 | if (!xfrm_state_kern(x) && |
5794708f | 633 | xfrm_id_proto_match(x->id.proto, proto)) { |
1da177e4 LT |
634 | xfrm_state_hold(x); |
635 | spin_unlock_bh(&xfrm_state_lock); | |
636 | ||
161a09e7 | 637 | err = xfrm_state_delete(x); |
ab5f5e8b JL |
638 | xfrm_audit_state_delete(x, err ? 0 : 1, |
639 | audit_info->loginuid, | |
640 | audit_info->secid); | |
1da177e4 LT |
641 | xfrm_state_put(x); |
642 | ||
643 | spin_lock_bh(&xfrm_state_lock); | |
644 | goto restart; | |
645 | } | |
646 | } | |
647 | } | |
4aa2e62c JL |
648 | err = 0; |
649 | ||
650 | out: | |
1da177e4 LT |
651 | spin_unlock_bh(&xfrm_state_lock); |
652 | wake_up(&km_waitq); | |
4aa2e62c | 653 | return err; |
1da177e4 LT |
654 | } |
655 | EXPORT_SYMBOL(xfrm_state_flush); | |
656 | ||
af11e316 | 657 | void xfrm_sad_getinfo(struct xfrmk_sadinfo *si) |
28d8909b JHS |
658 | { |
659 | spin_lock_bh(&xfrm_state_lock); | |
660 | si->sadcnt = xfrm_state_num; | |
661 | si->sadhcnt = xfrm_state_hmask; | |
662 | si->sadhmcnt = xfrm_state_hashmax; | |
663 | spin_unlock_bh(&xfrm_state_lock); | |
664 | } | |
665 | EXPORT_SYMBOL(xfrm_sad_getinfo); | |
666 | ||
1da177e4 LT |
667 | static int |
668 | xfrm_init_tempsel(struct xfrm_state *x, struct flowi *fl, | |
669 | struct xfrm_tmpl *tmpl, | |
670 | xfrm_address_t *daddr, xfrm_address_t *saddr, | |
671 | unsigned short family) | |
672 | { | |
673 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
674 | if (!afinfo) | |
675 | return -1; | |
676 | afinfo->init_tempsel(x, fl, tmpl, daddr, saddr); | |
677 | xfrm_state_put_afinfo(afinfo); | |
678 | return 0; | |
679 | } | |
680 | ||
a94cfd19 | 681 | static struct xfrm_state *__xfrm_state_lookup(xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family) |
edcd5821 DM |
682 | { |
683 | unsigned int h = xfrm_spi_hash(daddr, spi, proto, family); | |
684 | struct xfrm_state *x; | |
8f126e37 | 685 | struct hlist_node *entry; |
edcd5821 | 686 | |
8f126e37 | 687 | hlist_for_each_entry(x, entry, xfrm_state_byspi+h, byspi) { |
edcd5821 DM |
688 | if (x->props.family != family || |
689 | x->id.spi != spi || | |
690 | x->id.proto != proto) | |
691 | continue; | |
692 | ||
693 | switch (family) { | |
694 | case AF_INET: | |
695 | if (x->id.daddr.a4 != daddr->a4) | |
696 | continue; | |
697 | break; | |
698 | case AF_INET6: | |
699 | if (!ipv6_addr_equal((struct in6_addr *)daddr, | |
700 | (struct in6_addr *) | |
701 | x->id.daddr.a6)) | |
702 | continue; | |
703 | break; | |
3ff50b79 | 704 | } |
edcd5821 DM |
705 | |
706 | xfrm_state_hold(x); | |
707 | return x; | |
708 | } | |
709 | ||
710 | return NULL; | |
711 | } | |
712 | ||
713 | static struct xfrm_state *__xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family) | |
714 | { | |
667bbcb6 | 715 | unsigned int h = xfrm_src_hash(daddr, saddr, family); |
edcd5821 | 716 | struct xfrm_state *x; |
8f126e37 | 717 | struct hlist_node *entry; |
edcd5821 | 718 | |
8f126e37 | 719 | hlist_for_each_entry(x, entry, xfrm_state_bysrc+h, bysrc) { |
edcd5821 DM |
720 | if (x->props.family != family || |
721 | x->id.proto != proto) | |
722 | continue; | |
723 | ||
724 | switch (family) { | |
725 | case AF_INET: | |
726 | if (x->id.daddr.a4 != daddr->a4 || | |
727 | x->props.saddr.a4 != saddr->a4) | |
728 | continue; | |
729 | break; | |
730 | case AF_INET6: | |
731 | if (!ipv6_addr_equal((struct in6_addr *)daddr, | |
732 | (struct in6_addr *) | |
733 | x->id.daddr.a6) || | |
734 | !ipv6_addr_equal((struct in6_addr *)saddr, | |
735 | (struct in6_addr *) | |
736 | x->props.saddr.a6)) | |
737 | continue; | |
738 | break; | |
3ff50b79 | 739 | } |
edcd5821 DM |
740 | |
741 | xfrm_state_hold(x); | |
742 | return x; | |
743 | } | |
744 | ||
745 | return NULL; | |
746 | } | |
747 | ||
748 | static inline struct xfrm_state * | |
749 | __xfrm_state_locate(struct xfrm_state *x, int use_spi, int family) | |
750 | { | |
751 | if (use_spi) | |
752 | return __xfrm_state_lookup(&x->id.daddr, x->id.spi, | |
753 | x->id.proto, family); | |
754 | else | |
755 | return __xfrm_state_lookup_byaddr(&x->id.daddr, | |
756 | &x->props.saddr, | |
757 | x->id.proto, family); | |
758 | } | |
759 | ||
2fab22f2 PM |
760 | static void xfrm_hash_grow_check(int have_hash_collision) |
761 | { | |
762 | if (have_hash_collision && | |
763 | (xfrm_state_hmask + 1) < xfrm_state_hashmax && | |
764 | xfrm_state_num > xfrm_state_hmask) | |
765 | schedule_work(&xfrm_hash_work); | |
766 | } | |
767 | ||
1da177e4 | 768 | struct xfrm_state * |
a716c119 | 769 | xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, |
1da177e4 LT |
770 | struct flowi *fl, struct xfrm_tmpl *tmpl, |
771 | struct xfrm_policy *pol, int *err, | |
772 | unsigned short family) | |
773 | { | |
4bda4f25 | 774 | unsigned int h; |
8f126e37 | 775 | struct hlist_node *entry; |
1da177e4 LT |
776 | struct xfrm_state *x, *x0; |
777 | int acquire_in_progress = 0; | |
778 | int error = 0; | |
779 | struct xfrm_state *best = NULL; | |
a716c119 | 780 | |
1da177e4 | 781 | spin_lock_bh(&xfrm_state_lock); |
4bda4f25 | 782 | h = xfrm_dst_hash(daddr, saddr, tmpl->reqid, family); |
8f126e37 | 783 | hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) { |
1da177e4 LT |
784 | if (x->props.family == family && |
785 | x->props.reqid == tmpl->reqid && | |
fbd9a5b4 | 786 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
1da177e4 LT |
787 | xfrm_state_addr_check(x, daddr, saddr, family) && |
788 | tmpl->mode == x->props.mode && | |
789 | tmpl->id.proto == x->id.proto && | |
790 | (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) { | |
791 | /* Resolution logic: | |
792 | 1. There is a valid state with matching selector. | |
793 | Done. | |
794 | 2. Valid state with inappropriate selector. Skip. | |
795 | ||
796 | Entering area of "sysdeps". | |
797 | ||
798 | 3. If state is not valid, selector is temporary, | |
799 | it selects only session which triggered | |
800 | previous resolution. Key manager will do | |
801 | something to install a state with proper | |
802 | selector. | |
803 | */ | |
804 | if (x->km.state == XFRM_STATE_VALID) { | |
48b8d783 | 805 | if (!xfrm_selector_match(&x->sel, fl, x->sel.family) || |
e0d1caa7 | 806 | !security_xfrm_state_pol_flow_match(x, pol, fl)) |
1da177e4 LT |
807 | continue; |
808 | if (!best || | |
809 | best->km.dying > x->km.dying || | |
810 | (best->km.dying == x->km.dying && | |
811 | best->curlft.add_time < x->curlft.add_time)) | |
812 | best = x; | |
813 | } else if (x->km.state == XFRM_STATE_ACQ) { | |
814 | acquire_in_progress = 1; | |
815 | } else if (x->km.state == XFRM_STATE_ERROR || | |
816 | x->km.state == XFRM_STATE_EXPIRED) { | |
48b8d783 | 817 | if (xfrm_selector_match(&x->sel, fl, x->sel.family) && |
e0d1caa7 | 818 | security_xfrm_state_pol_flow_match(x, pol, fl)) |
1da177e4 LT |
819 | error = -ESRCH; |
820 | } | |
821 | } | |
822 | } | |
823 | ||
824 | x = best; | |
825 | if (!x && !error && !acquire_in_progress) { | |
5c5d281a | 826 | if (tmpl->id.spi && |
edcd5821 DM |
827 | (x0 = __xfrm_state_lookup(daddr, tmpl->id.spi, |
828 | tmpl->id.proto, family)) != NULL) { | |
1da177e4 LT |
829 | xfrm_state_put(x0); |
830 | error = -EEXIST; | |
831 | goto out; | |
832 | } | |
833 | x = xfrm_state_alloc(); | |
834 | if (x == NULL) { | |
835 | error = -ENOMEM; | |
836 | goto out; | |
837 | } | |
838 | /* Initialize temporary selector matching only | |
839 | * to current session. */ | |
840 | xfrm_init_tempsel(x, fl, tmpl, daddr, saddr, family); | |
841 | ||
e0d1caa7 VY |
842 | error = security_xfrm_state_alloc_acquire(x, pol->security, fl->secid); |
843 | if (error) { | |
844 | x->km.state = XFRM_STATE_DEAD; | |
845 | xfrm_state_put(x); | |
846 | x = NULL; | |
847 | goto out; | |
848 | } | |
849 | ||
1da177e4 LT |
850 | if (km_query(x, tmpl, pol) == 0) { |
851 | x->km.state = XFRM_STATE_ACQ; | |
8f126e37 | 852 | hlist_add_head(&x->bydst, xfrm_state_bydst+h); |
667bbcb6 | 853 | h = xfrm_src_hash(daddr, saddr, family); |
8f126e37 | 854 | hlist_add_head(&x->bysrc, xfrm_state_bysrc+h); |
1da177e4 LT |
855 | if (x->id.spi) { |
856 | h = xfrm_spi_hash(&x->id.daddr, x->id.spi, x->id.proto, family); | |
8f126e37 | 857 | hlist_add_head(&x->byspi, xfrm_state_byspi+h); |
1da177e4 | 858 | } |
01e67d08 DM |
859 | x->lft.hard_add_expires_seconds = sysctl_xfrm_acq_expires; |
860 | x->timer.expires = jiffies + sysctl_xfrm_acq_expires*HZ; | |
1da177e4 | 861 | add_timer(&x->timer); |
2fab22f2 PM |
862 | xfrm_state_num++; |
863 | xfrm_hash_grow_check(x->bydst.next != NULL); | |
1da177e4 LT |
864 | } else { |
865 | x->km.state = XFRM_STATE_DEAD; | |
866 | xfrm_state_put(x); | |
867 | x = NULL; | |
868 | error = -ESRCH; | |
869 | } | |
870 | } | |
871 | out: | |
872 | if (x) | |
873 | xfrm_state_hold(x); | |
874 | else | |
875 | *err = acquire_in_progress ? -EAGAIN : error; | |
876 | spin_unlock_bh(&xfrm_state_lock); | |
1da177e4 LT |
877 | return x; |
878 | } | |
879 | ||
628529b6 JHS |
880 | struct xfrm_state * |
881 | xfrm_stateonly_find(xfrm_address_t *daddr, xfrm_address_t *saddr, | |
882 | unsigned short family, u8 mode, u8 proto, u32 reqid) | |
883 | { | |
4bda4f25 | 884 | unsigned int h; |
628529b6 JHS |
885 | struct xfrm_state *rx = NULL, *x = NULL; |
886 | struct hlist_node *entry; | |
887 | ||
888 | spin_lock(&xfrm_state_lock); | |
4bda4f25 | 889 | h = xfrm_dst_hash(daddr, saddr, reqid, family); |
628529b6 JHS |
890 | hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) { |
891 | if (x->props.family == family && | |
892 | x->props.reqid == reqid && | |
893 | !(x->props.flags & XFRM_STATE_WILDRECV) && | |
894 | xfrm_state_addr_check(x, daddr, saddr, family) && | |
895 | mode == x->props.mode && | |
896 | proto == x->id.proto && | |
897 | x->km.state == XFRM_STATE_VALID) { | |
898 | rx = x; | |
899 | break; | |
900 | } | |
901 | } | |
902 | ||
903 | if (rx) | |
904 | xfrm_state_hold(rx); | |
905 | spin_unlock(&xfrm_state_lock); | |
906 | ||
907 | ||
908 | return rx; | |
909 | } | |
910 | EXPORT_SYMBOL(xfrm_stateonly_find); | |
911 | ||
1da177e4 LT |
912 | static void __xfrm_state_insert(struct xfrm_state *x) |
913 | { | |
a624c108 | 914 | unsigned int h; |
1da177e4 | 915 | |
9d4a706d DM |
916 | x->genid = ++xfrm_state_genid; |
917 | ||
4c563f76 TT |
918 | list_add_tail(&x->all, &xfrm_state_all); |
919 | ||
c1969f29 DM |
920 | h = xfrm_dst_hash(&x->id.daddr, &x->props.saddr, |
921 | x->props.reqid, x->props.family); | |
8f126e37 | 922 | hlist_add_head(&x->bydst, xfrm_state_bydst+h); |
1da177e4 | 923 | |
667bbcb6 | 924 | h = xfrm_src_hash(&x->id.daddr, &x->props.saddr, x->props.family); |
8f126e37 | 925 | hlist_add_head(&x->bysrc, xfrm_state_bysrc+h); |
1da177e4 | 926 | |
7b4dc360 | 927 | if (x->id.spi) { |
6c44e6b7 MN |
928 | h = xfrm_spi_hash(&x->id.daddr, x->id.spi, x->id.proto, |
929 | x->props.family); | |
930 | ||
8f126e37 | 931 | hlist_add_head(&x->byspi, xfrm_state_byspi+h); |
6c44e6b7 MN |
932 | } |
933 | ||
a47f0ce0 DM |
934 | mod_timer(&x->timer, jiffies + HZ); |
935 | if (x->replay_maxage) | |
936 | mod_timer(&x->rtimer, jiffies + x->replay_maxage); | |
f8cd5488 | 937 | |
1da177e4 | 938 | wake_up(&km_waitq); |
f034b5d4 DM |
939 | |
940 | xfrm_state_num++; | |
941 | ||
918049f0 | 942 | xfrm_hash_grow_check(x->bydst.next != NULL); |
1da177e4 LT |
943 | } |
944 | ||
c7f5ea3a DM |
945 | /* xfrm_state_lock is held */ |
946 | static void __xfrm_state_bump_genids(struct xfrm_state *xnew) | |
947 | { | |
948 | unsigned short family = xnew->props.family; | |
949 | u32 reqid = xnew->props.reqid; | |
950 | struct xfrm_state *x; | |
951 | struct hlist_node *entry; | |
952 | unsigned int h; | |
953 | ||
c1969f29 | 954 | h = xfrm_dst_hash(&xnew->id.daddr, &xnew->props.saddr, reqid, family); |
c7f5ea3a DM |
955 | hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) { |
956 | if (x->props.family == family && | |
957 | x->props.reqid == reqid && | |
c1969f29 DM |
958 | !xfrm_addr_cmp(&x->id.daddr, &xnew->id.daddr, family) && |
959 | !xfrm_addr_cmp(&x->props.saddr, &xnew->props.saddr, family)) | |
c7f5ea3a DM |
960 | x->genid = xfrm_state_genid; |
961 | } | |
962 | } | |
963 | ||
1da177e4 LT |
964 | void xfrm_state_insert(struct xfrm_state *x) |
965 | { | |
966 | spin_lock_bh(&xfrm_state_lock); | |
c7f5ea3a | 967 | __xfrm_state_bump_genids(x); |
1da177e4 LT |
968 | __xfrm_state_insert(x); |
969 | spin_unlock_bh(&xfrm_state_lock); | |
970 | } | |
971 | EXPORT_SYMBOL(xfrm_state_insert); | |
972 | ||
2770834c DM |
973 | /* xfrm_state_lock is held */ |
974 | 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) | |
975 | { | |
c1969f29 | 976 | unsigned int h = xfrm_dst_hash(daddr, saddr, reqid, family); |
8f126e37 | 977 | struct hlist_node *entry; |
2770834c DM |
978 | struct xfrm_state *x; |
979 | ||
8f126e37 | 980 | hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) { |
2770834c DM |
981 | if (x->props.reqid != reqid || |
982 | x->props.mode != mode || | |
983 | x->props.family != family || | |
984 | x->km.state != XFRM_STATE_ACQ || | |
75e252d9 JL |
985 | x->id.spi != 0 || |
986 | x->id.proto != proto) | |
2770834c DM |
987 | continue; |
988 | ||
989 | switch (family) { | |
990 | case AF_INET: | |
991 | if (x->id.daddr.a4 != daddr->a4 || | |
992 | x->props.saddr.a4 != saddr->a4) | |
993 | continue; | |
994 | break; | |
995 | case AF_INET6: | |
996 | if (!ipv6_addr_equal((struct in6_addr *)x->id.daddr.a6, | |
997 | (struct in6_addr *)daddr) || | |
998 | !ipv6_addr_equal((struct in6_addr *) | |
999 | x->props.saddr.a6, | |
1000 | (struct in6_addr *)saddr)) | |
1001 | continue; | |
1002 | break; | |
3ff50b79 | 1003 | } |
2770834c DM |
1004 | |
1005 | xfrm_state_hold(x); | |
1006 | return x; | |
1007 | } | |
1008 | ||
1009 | if (!create) | |
1010 | return NULL; | |
1011 | ||
1012 | x = xfrm_state_alloc(); | |
1013 | if (likely(x)) { | |
1014 | switch (family) { | |
1015 | case AF_INET: | |
1016 | x->sel.daddr.a4 = daddr->a4; | |
1017 | x->sel.saddr.a4 = saddr->a4; | |
1018 | x->sel.prefixlen_d = 32; | |
1019 | x->sel.prefixlen_s = 32; | |
1020 | x->props.saddr.a4 = saddr->a4; | |
1021 | x->id.daddr.a4 = daddr->a4; | |
1022 | break; | |
1023 | ||
1024 | case AF_INET6: | |
1025 | ipv6_addr_copy((struct in6_addr *)x->sel.daddr.a6, | |
1026 | (struct in6_addr *)daddr); | |
1027 | ipv6_addr_copy((struct in6_addr *)x->sel.saddr.a6, | |
1028 | (struct in6_addr *)saddr); | |
1029 | x->sel.prefixlen_d = 128; | |
1030 | x->sel.prefixlen_s = 128; | |
1031 | ipv6_addr_copy((struct in6_addr *)x->props.saddr.a6, | |
1032 | (struct in6_addr *)saddr); | |
1033 | ipv6_addr_copy((struct in6_addr *)x->id.daddr.a6, | |
1034 | (struct in6_addr *)daddr); | |
1035 | break; | |
3ff50b79 | 1036 | } |
2770834c DM |
1037 | |
1038 | x->km.state = XFRM_STATE_ACQ; | |
1039 | x->id.proto = proto; | |
1040 | x->props.family = family; | |
1041 | x->props.mode = mode; | |
1042 | x->props.reqid = reqid; | |
01e67d08 | 1043 | x->lft.hard_add_expires_seconds = sysctl_xfrm_acq_expires; |
2770834c | 1044 | xfrm_state_hold(x); |
01e67d08 | 1045 | x->timer.expires = jiffies + sysctl_xfrm_acq_expires*HZ; |
2770834c | 1046 | add_timer(&x->timer); |
8f126e37 | 1047 | hlist_add_head(&x->bydst, xfrm_state_bydst+h); |
667bbcb6 | 1048 | h = xfrm_src_hash(daddr, saddr, family); |
8f126e37 | 1049 | hlist_add_head(&x->bysrc, xfrm_state_bysrc+h); |
918049f0 DM |
1050 | |
1051 | xfrm_state_num++; | |
1052 | ||
1053 | xfrm_hash_grow_check(x->bydst.next != NULL); | |
2770834c DM |
1054 | } |
1055 | ||
1056 | return x; | |
1057 | } | |
1058 | ||
1da177e4 LT |
1059 | static struct xfrm_state *__xfrm_find_acq_byseq(u32 seq); |
1060 | ||
1061 | int xfrm_state_add(struct xfrm_state *x) | |
1062 | { | |
1da177e4 LT |
1063 | struct xfrm_state *x1; |
1064 | int family; | |
1065 | int err; | |
eb2971b6 | 1066 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
1da177e4 LT |
1067 | |
1068 | family = x->props.family; | |
1da177e4 LT |
1069 | |
1070 | spin_lock_bh(&xfrm_state_lock); | |
1071 | ||
edcd5821 | 1072 | x1 = __xfrm_state_locate(x, use_spi, family); |
1da177e4 LT |
1073 | if (x1) { |
1074 | xfrm_state_put(x1); | |
1075 | x1 = NULL; | |
1076 | err = -EEXIST; | |
1077 | goto out; | |
1078 | } | |
1079 | ||
eb2971b6 | 1080 | if (use_spi && x->km.seq) { |
1da177e4 | 1081 | x1 = __xfrm_find_acq_byseq(x->km.seq); |
75e252d9 JL |
1082 | if (x1 && ((x1->id.proto != x->id.proto) || |
1083 | xfrm_addr_cmp(&x1->id.daddr, &x->id.daddr, family))) { | |
1da177e4 LT |
1084 | xfrm_state_put(x1); |
1085 | x1 = NULL; | |
1086 | } | |
1087 | } | |
1088 | ||
eb2971b6 | 1089 | if (use_spi && !x1) |
2770834c DM |
1090 | x1 = __find_acq_core(family, x->props.mode, x->props.reqid, |
1091 | x->id.proto, | |
1092 | &x->id.daddr, &x->props.saddr, 0); | |
1da177e4 | 1093 | |
c7f5ea3a | 1094 | __xfrm_state_bump_genids(x); |
1da177e4 LT |
1095 | __xfrm_state_insert(x); |
1096 | err = 0; | |
1097 | ||
1098 | out: | |
1099 | spin_unlock_bh(&xfrm_state_lock); | |
1da177e4 LT |
1100 | |
1101 | if (x1) { | |
1102 | xfrm_state_delete(x1); | |
1103 | xfrm_state_put(x1); | |
1104 | } | |
1105 | ||
1106 | return err; | |
1107 | } | |
1108 | EXPORT_SYMBOL(xfrm_state_add); | |
1109 | ||
80c9abaa | 1110 | #ifdef CONFIG_XFRM_MIGRATE |
6666351d | 1111 | static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, int *errp) |
80c9abaa SS |
1112 | { |
1113 | int err = -ENOMEM; | |
1114 | struct xfrm_state *x = xfrm_state_alloc(); | |
1115 | if (!x) | |
1116 | goto error; | |
1117 | ||
1118 | memcpy(&x->id, &orig->id, sizeof(x->id)); | |
1119 | memcpy(&x->sel, &orig->sel, sizeof(x->sel)); | |
1120 | memcpy(&x->lft, &orig->lft, sizeof(x->lft)); | |
1121 | x->props.mode = orig->props.mode; | |
1122 | x->props.replay_window = orig->props.replay_window; | |
1123 | x->props.reqid = orig->props.reqid; | |
1124 | x->props.family = orig->props.family; | |
1125 | x->props.saddr = orig->props.saddr; | |
1126 | ||
1127 | if (orig->aalg) { | |
1128 | x->aalg = xfrm_algo_clone(orig->aalg); | |
1129 | if (!x->aalg) | |
1130 | goto error; | |
1131 | } | |
1132 | x->props.aalgo = orig->props.aalgo; | |
1133 | ||
1134 | if (orig->ealg) { | |
1135 | x->ealg = xfrm_algo_clone(orig->ealg); | |
1136 | if (!x->ealg) | |
1137 | goto error; | |
1138 | } | |
1139 | x->props.ealgo = orig->props.ealgo; | |
1140 | ||
1141 | if (orig->calg) { | |
1142 | x->calg = xfrm_algo_clone(orig->calg); | |
1143 | if (!x->calg) | |
1144 | goto error; | |
1145 | } | |
1146 | x->props.calgo = orig->props.calgo; | |
1147 | ||
a716c119 | 1148 | if (orig->encap) { |
80c9abaa SS |
1149 | x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL); |
1150 | if (!x->encap) | |
1151 | goto error; | |
1152 | } | |
1153 | ||
1154 | if (orig->coaddr) { | |
1155 | x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr), | |
1156 | GFP_KERNEL); | |
1157 | if (!x->coaddr) | |
1158 | goto error; | |
1159 | } | |
1160 | ||
1161 | err = xfrm_init_state(x); | |
1162 | if (err) | |
1163 | goto error; | |
1164 | ||
1165 | x->props.flags = orig->props.flags; | |
1166 | ||
1167 | x->curlft.add_time = orig->curlft.add_time; | |
1168 | x->km.state = orig->km.state; | |
1169 | x->km.seq = orig->km.seq; | |
1170 | ||
1171 | return x; | |
1172 | ||
1173 | error: | |
1174 | if (errp) | |
1175 | *errp = err; | |
1176 | if (x) { | |
1177 | kfree(x->aalg); | |
1178 | kfree(x->ealg); | |
1179 | kfree(x->calg); | |
1180 | kfree(x->encap); | |
1181 | kfree(x->coaddr); | |
1182 | } | |
1183 | kfree(x); | |
1184 | return NULL; | |
1185 | } | |
80c9abaa SS |
1186 | |
1187 | /* xfrm_state_lock is held */ | |
1188 | struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m) | |
1189 | { | |
1190 | unsigned int h; | |
1191 | struct xfrm_state *x; | |
1192 | struct hlist_node *entry; | |
1193 | ||
1194 | if (m->reqid) { | |
1195 | h = xfrm_dst_hash(&m->old_daddr, &m->old_saddr, | |
1196 | m->reqid, m->old_family); | |
1197 | hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) { | |
1198 | if (x->props.mode != m->mode || | |
1199 | x->id.proto != m->proto) | |
1200 | continue; | |
1201 | if (m->reqid && x->props.reqid != m->reqid) | |
1202 | continue; | |
1203 | if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr, | |
1204 | m->old_family) || | |
1205 | xfrm_addr_cmp(&x->props.saddr, &m->old_saddr, | |
1206 | m->old_family)) | |
1207 | continue; | |
1208 | xfrm_state_hold(x); | |
1209 | return x; | |
1210 | } | |
1211 | } else { | |
1212 | h = xfrm_src_hash(&m->old_daddr, &m->old_saddr, | |
1213 | m->old_family); | |
1214 | hlist_for_each_entry(x, entry, xfrm_state_bysrc+h, bysrc) { | |
1215 | if (x->props.mode != m->mode || | |
1216 | x->id.proto != m->proto) | |
1217 | continue; | |
1218 | if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr, | |
1219 | m->old_family) || | |
1220 | xfrm_addr_cmp(&x->props.saddr, &m->old_saddr, | |
1221 | m->old_family)) | |
1222 | continue; | |
1223 | xfrm_state_hold(x); | |
1224 | return x; | |
1225 | } | |
1226 | } | |
1227 | ||
a716c119 | 1228 | return NULL; |
80c9abaa SS |
1229 | } |
1230 | EXPORT_SYMBOL(xfrm_migrate_state_find); | |
1231 | ||
1232 | struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, | |
1233 | struct xfrm_migrate *m) | |
1234 | { | |
1235 | struct xfrm_state *xc; | |
1236 | int err; | |
1237 | ||
1238 | xc = xfrm_state_clone(x, &err); | |
1239 | if (!xc) | |
1240 | return NULL; | |
1241 | ||
1242 | memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr)); | |
1243 | memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr)); | |
1244 | ||
1245 | /* add state */ | |
1246 | if (!xfrm_addr_cmp(&x->id.daddr, &m->new_daddr, m->new_family)) { | |
1247 | /* a care is needed when the destination address of the | |
1248 | state is to be updated as it is a part of triplet */ | |
1249 | xfrm_state_insert(xc); | |
1250 | } else { | |
1251 | if ((err = xfrm_state_add(xc)) < 0) | |
1252 | goto error; | |
1253 | } | |
1254 | ||
1255 | return xc; | |
1256 | error: | |
1257 | kfree(xc); | |
1258 | return NULL; | |
1259 | } | |
1260 | EXPORT_SYMBOL(xfrm_state_migrate); | |
1261 | #endif | |
1262 | ||
1da177e4 LT |
1263 | int xfrm_state_update(struct xfrm_state *x) |
1264 | { | |
1da177e4 LT |
1265 | struct xfrm_state *x1; |
1266 | int err; | |
eb2971b6 | 1267 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
1da177e4 | 1268 | |
1da177e4 | 1269 | spin_lock_bh(&xfrm_state_lock); |
edcd5821 | 1270 | x1 = __xfrm_state_locate(x, use_spi, x->props.family); |
1da177e4 LT |
1271 | |
1272 | err = -ESRCH; | |
1273 | if (!x1) | |
1274 | goto out; | |
1275 | ||
1276 | if (xfrm_state_kern(x1)) { | |
1277 | xfrm_state_put(x1); | |
1278 | err = -EEXIST; | |
1279 | goto out; | |
1280 | } | |
1281 | ||
1282 | if (x1->km.state == XFRM_STATE_ACQ) { | |
1283 | __xfrm_state_insert(x); | |
1284 | x = NULL; | |
1285 | } | |
1286 | err = 0; | |
1287 | ||
1288 | out: | |
1289 | spin_unlock_bh(&xfrm_state_lock); | |
1da177e4 LT |
1290 | |
1291 | if (err) | |
1292 | return err; | |
1293 | ||
1294 | if (!x) { | |
1295 | xfrm_state_delete(x1); | |
1296 | xfrm_state_put(x1); | |
1297 | return 0; | |
1298 | } | |
1299 | ||
1300 | err = -EINVAL; | |
1301 | spin_lock_bh(&x1->lock); | |
1302 | if (likely(x1->km.state == XFRM_STATE_VALID)) { | |
1303 | if (x->encap && x1->encap) | |
1304 | memcpy(x1->encap, x->encap, sizeof(*x1->encap)); | |
060f02a3 NT |
1305 | if (x->coaddr && x1->coaddr) { |
1306 | memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr)); | |
1307 | } | |
1308 | if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel))) | |
1309 | memcpy(&x1->sel, &x->sel, sizeof(x1->sel)); | |
1da177e4 LT |
1310 | memcpy(&x1->lft, &x->lft, sizeof(x1->lft)); |
1311 | x1->km.dying = 0; | |
1312 | ||
a47f0ce0 | 1313 | mod_timer(&x1->timer, jiffies + HZ); |
1da177e4 LT |
1314 | if (x1->curlft.use_time) |
1315 | xfrm_state_check_expire(x1); | |
1316 | ||
1317 | err = 0; | |
1318 | } | |
1319 | spin_unlock_bh(&x1->lock); | |
1320 | ||
1321 | xfrm_state_put(x1); | |
1322 | ||
1323 | return err; | |
1324 | } | |
1325 | EXPORT_SYMBOL(xfrm_state_update); | |
1326 | ||
1327 | int xfrm_state_check_expire(struct xfrm_state *x) | |
1328 | { | |
1329 | if (!x->curlft.use_time) | |
9d729f72 | 1330 | x->curlft.use_time = get_seconds(); |
1da177e4 LT |
1331 | |
1332 | if (x->km.state != XFRM_STATE_VALID) | |
1333 | return -EINVAL; | |
1334 | ||
1335 | if (x->curlft.bytes >= x->lft.hard_byte_limit || | |
1336 | x->curlft.packets >= x->lft.hard_packet_limit) { | |
4666faab | 1337 | x->km.state = XFRM_STATE_EXPIRED; |
a47f0ce0 | 1338 | mod_timer(&x->timer, jiffies); |
1da177e4 LT |
1339 | return -EINVAL; |
1340 | } | |
1341 | ||
1342 | if (!x->km.dying && | |
1343 | (x->curlft.bytes >= x->lft.soft_byte_limit || | |
4666faab HX |
1344 | x->curlft.packets >= x->lft.soft_packet_limit)) { |
1345 | x->km.dying = 1; | |
53bc6b4d | 1346 | km_state_expired(x, 0, 0); |
4666faab | 1347 | } |
1da177e4 LT |
1348 | return 0; |
1349 | } | |
1350 | EXPORT_SYMBOL(xfrm_state_check_expire); | |
1351 | ||
1da177e4 | 1352 | struct xfrm_state * |
a94cfd19 | 1353 | xfrm_state_lookup(xfrm_address_t *daddr, __be32 spi, u8 proto, |
1da177e4 LT |
1354 | unsigned short family) |
1355 | { | |
1356 | struct xfrm_state *x; | |
1da177e4 LT |
1357 | |
1358 | spin_lock_bh(&xfrm_state_lock); | |
edcd5821 | 1359 | x = __xfrm_state_lookup(daddr, spi, proto, family); |
1da177e4 | 1360 | spin_unlock_bh(&xfrm_state_lock); |
1da177e4 LT |
1361 | return x; |
1362 | } | |
1363 | EXPORT_SYMBOL(xfrm_state_lookup); | |
1364 | ||
1365 | struct xfrm_state * | |
eb2971b6 MN |
1366 | xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, |
1367 | u8 proto, unsigned short family) | |
1368 | { | |
1369 | struct xfrm_state *x; | |
eb2971b6 MN |
1370 | |
1371 | spin_lock_bh(&xfrm_state_lock); | |
edcd5821 | 1372 | x = __xfrm_state_lookup_byaddr(daddr, saddr, proto, family); |
eb2971b6 | 1373 | spin_unlock_bh(&xfrm_state_lock); |
eb2971b6 MN |
1374 | return x; |
1375 | } | |
1376 | EXPORT_SYMBOL(xfrm_state_lookup_byaddr); | |
1377 | ||
1378 | struct xfrm_state * | |
a716c119 YH |
1379 | xfrm_find_acq(u8 mode, u32 reqid, u8 proto, |
1380 | xfrm_address_t *daddr, xfrm_address_t *saddr, | |
1da177e4 LT |
1381 | int create, unsigned short family) |
1382 | { | |
1383 | struct xfrm_state *x; | |
1da177e4 LT |
1384 | |
1385 | spin_lock_bh(&xfrm_state_lock); | |
2770834c | 1386 | x = __find_acq_core(family, mode, reqid, proto, daddr, saddr, create); |
1da177e4 | 1387 | spin_unlock_bh(&xfrm_state_lock); |
2770834c | 1388 | |
1da177e4 LT |
1389 | return x; |
1390 | } | |
1391 | EXPORT_SYMBOL(xfrm_find_acq); | |
1392 | ||
41a49cc3 MN |
1393 | #ifdef CONFIG_XFRM_SUB_POLICY |
1394 | int | |
1395 | xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **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->tmpl_sort) | |
1405 | err = afinfo->tmpl_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_tmpl_sort); | |
1411 | ||
1412 | int | |
1413 | xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, | |
1414 | unsigned short family) | |
1415 | { | |
1416 | int err = 0; | |
1417 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
1418 | if (!afinfo) | |
1419 | return -EAFNOSUPPORT; | |
1420 | ||
1421 | spin_lock_bh(&xfrm_state_lock); | |
1422 | if (afinfo->state_sort) | |
1423 | err = afinfo->state_sort(dst, src, n); | |
1424 | spin_unlock_bh(&xfrm_state_lock); | |
1425 | xfrm_state_put_afinfo(afinfo); | |
1426 | return err; | |
1427 | } | |
1428 | EXPORT_SYMBOL(xfrm_state_sort); | |
1429 | #endif | |
1430 | ||
1da177e4 LT |
1431 | /* Silly enough, but I'm lazy to build resolution list */ |
1432 | ||
1433 | static struct xfrm_state *__xfrm_find_acq_byseq(u32 seq) | |
1434 | { | |
1435 | int i; | |
1da177e4 | 1436 | |
f034b5d4 | 1437 | for (i = 0; i <= xfrm_state_hmask; i++) { |
8f126e37 DM |
1438 | struct hlist_node *entry; |
1439 | struct xfrm_state *x; | |
1440 | ||
1441 | hlist_for_each_entry(x, entry, xfrm_state_bydst+i, bydst) { | |
1442 | if (x->km.seq == seq && | |
1443 | x->km.state == XFRM_STATE_ACQ) { | |
1da177e4 LT |
1444 | xfrm_state_hold(x); |
1445 | return x; | |
1446 | } | |
1447 | } | |
1448 | } | |
1449 | return NULL; | |
1450 | } | |
1451 | ||
1452 | struct xfrm_state *xfrm_find_acq_byseq(u32 seq) | |
1453 | { | |
1454 | struct xfrm_state *x; | |
1455 | ||
1456 | spin_lock_bh(&xfrm_state_lock); | |
1457 | x = __xfrm_find_acq_byseq(seq); | |
1458 | spin_unlock_bh(&xfrm_state_lock); | |
1459 | return x; | |
1460 | } | |
1461 | EXPORT_SYMBOL(xfrm_find_acq_byseq); | |
1462 | ||
1463 | u32 xfrm_get_acqseq(void) | |
1464 | { | |
1465 | u32 res; | |
1466 | static u32 acqseq; | |
1467 | static DEFINE_SPINLOCK(acqseq_lock); | |
1468 | ||
1469 | spin_lock_bh(&acqseq_lock); | |
1470 | res = (++acqseq ? : ++acqseq); | |
1471 | spin_unlock_bh(&acqseq_lock); | |
1472 | return res; | |
1473 | } | |
1474 | EXPORT_SYMBOL(xfrm_get_acqseq); | |
1475 | ||
658b219e | 1476 | int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high) |
1da177e4 | 1477 | { |
f034b5d4 | 1478 | unsigned int h; |
1da177e4 | 1479 | struct xfrm_state *x0; |
658b219e HX |
1480 | int err = -ENOENT; |
1481 | __be32 minspi = htonl(low); | |
1482 | __be32 maxspi = htonl(high); | |
1da177e4 | 1483 | |
658b219e HX |
1484 | spin_lock_bh(&x->lock); |
1485 | if (x->km.state == XFRM_STATE_DEAD) | |
1486 | goto unlock; | |
1487 | ||
1488 | err = 0; | |
1da177e4 | 1489 | if (x->id.spi) |
658b219e HX |
1490 | goto unlock; |
1491 | ||
1492 | err = -ENOENT; | |
1da177e4 LT |
1493 | |
1494 | if (minspi == maxspi) { | |
1495 | x0 = xfrm_state_lookup(&x->id.daddr, minspi, x->id.proto, x->props.family); | |
1496 | if (x0) { | |
1497 | xfrm_state_put(x0); | |
658b219e | 1498 | goto unlock; |
1da177e4 LT |
1499 | } |
1500 | x->id.spi = minspi; | |
1501 | } else { | |
1502 | u32 spi = 0; | |
26977b4e AV |
1503 | for (h=0; h<high-low+1; h++) { |
1504 | spi = low + net_random()%(high-low+1); | |
1da177e4 LT |
1505 | x0 = xfrm_state_lookup(&x->id.daddr, htonl(spi), x->id.proto, x->props.family); |
1506 | if (x0 == NULL) { | |
1507 | x->id.spi = htonl(spi); | |
1508 | break; | |
1509 | } | |
1510 | xfrm_state_put(x0); | |
1511 | } | |
1512 | } | |
1513 | if (x->id.spi) { | |
1514 | spin_lock_bh(&xfrm_state_lock); | |
1515 | h = xfrm_spi_hash(&x->id.daddr, x->id.spi, x->id.proto, x->props.family); | |
8f126e37 | 1516 | hlist_add_head(&x->byspi, xfrm_state_byspi+h); |
1da177e4 | 1517 | spin_unlock_bh(&xfrm_state_lock); |
658b219e HX |
1518 | |
1519 | err = 0; | |
1da177e4 | 1520 | } |
658b219e HX |
1521 | |
1522 | unlock: | |
1523 | spin_unlock_bh(&x->lock); | |
1524 | ||
1525 | return err; | |
1da177e4 LT |
1526 | } |
1527 | EXPORT_SYMBOL(xfrm_alloc_spi); | |
1528 | ||
4c563f76 TT |
1529 | int xfrm_state_walk(struct xfrm_state_walk *walk, |
1530 | int (*func)(struct xfrm_state *, int, void*), | |
1da177e4 LT |
1531 | void *data) |
1532 | { | |
4c563f76 | 1533 | struct xfrm_state *old, *x, *last = NULL; |
1da177e4 LT |
1534 | int err = 0; |
1535 | ||
4c563f76 TT |
1536 | if (walk->state == NULL && walk->count != 0) |
1537 | return 0; | |
1538 | ||
1539 | old = x = walk->state; | |
1540 | walk->state = NULL; | |
1da177e4 | 1541 | spin_lock_bh(&xfrm_state_lock); |
4c563f76 TT |
1542 | if (x == NULL) |
1543 | x = list_first_entry(&xfrm_state_all, struct xfrm_state, all); | |
1544 | list_for_each_entry_from(x, &xfrm_state_all, all) { | |
1545 | if (x->km.state == XFRM_STATE_DEAD) | |
1546 | continue; | |
1547 | if (!xfrm_id_proto_match(x->id.proto, walk->proto)) | |
1548 | continue; | |
1549 | if (last) { | |
1550 | err = func(last, walk->count, data); | |
1551 | if (err) { | |
1552 | xfrm_state_hold(last); | |
1553 | walk->state = last; | |
1554 | goto out; | |
94b9bb54 | 1555 | } |
1da177e4 | 1556 | } |
4c563f76 TT |
1557 | last = x; |
1558 | walk->count++; | |
1da177e4 | 1559 | } |
4c563f76 | 1560 | if (walk->count == 0) { |
1da177e4 LT |
1561 | err = -ENOENT; |
1562 | goto out; | |
1563 | } | |
4c563f76 TT |
1564 | if (last) |
1565 | err = func(last, 0, data); | |
1da177e4 LT |
1566 | out: |
1567 | spin_unlock_bh(&xfrm_state_lock); | |
4c563f76 TT |
1568 | if (old != NULL) |
1569 | xfrm_state_put(old); | |
1da177e4 LT |
1570 | return err; |
1571 | } | |
1572 | EXPORT_SYMBOL(xfrm_state_walk); | |
1573 | ||
f8cd5488 JHS |
1574 | |
1575 | void xfrm_replay_notify(struct xfrm_state *x, int event) | |
1576 | { | |
1577 | struct km_event c; | |
1578 | /* we send notify messages in case | |
1579 | * 1. we updated on of the sequence numbers, and the seqno difference | |
1580 | * is at least x->replay_maxdiff, in this case we also update the | |
1581 | * timeout of our timer function | |
1582 | * 2. if x->replay_maxage has elapsed since last update, | |
1583 | * and there were changes | |
1584 | * | |
1585 | * The state structure must be locked! | |
1586 | */ | |
1587 | ||
1588 | switch (event) { | |
1589 | case XFRM_REPLAY_UPDATE: | |
1590 | if (x->replay_maxdiff && | |
1591 | (x->replay.seq - x->preplay.seq < x->replay_maxdiff) && | |
2717096a JHS |
1592 | (x->replay.oseq - x->preplay.oseq < x->replay_maxdiff)) { |
1593 | if (x->xflags & XFRM_TIME_DEFER) | |
1594 | event = XFRM_REPLAY_TIMEOUT; | |
1595 | else | |
1596 | return; | |
1597 | } | |
f8cd5488 JHS |
1598 | |
1599 | break; | |
1600 | ||
1601 | case XFRM_REPLAY_TIMEOUT: | |
1602 | if ((x->replay.seq == x->preplay.seq) && | |
1603 | (x->replay.bitmap == x->preplay.bitmap) && | |
2717096a JHS |
1604 | (x->replay.oseq == x->preplay.oseq)) { |
1605 | x->xflags |= XFRM_TIME_DEFER; | |
f8cd5488 | 1606 | return; |
2717096a | 1607 | } |
f8cd5488 JHS |
1608 | |
1609 | break; | |
1610 | } | |
1611 | ||
1612 | memcpy(&x->preplay, &x->replay, sizeof(struct xfrm_replay_state)); | |
1613 | c.event = XFRM_MSG_NEWAE; | |
1614 | c.data.aevent = event; | |
1615 | km_state_notify(x, &c); | |
1616 | ||
f8cd5488 | 1617 | if (x->replay_maxage && |
a47f0ce0 | 1618 | !mod_timer(&x->rtimer, jiffies + x->replay_maxage)) |
2717096a | 1619 | x->xflags &= ~XFRM_TIME_DEFER; |
f8cd5488 JHS |
1620 | } |
1621 | ||
1622 | static void xfrm_replay_timer_handler(unsigned long data) | |
1623 | { | |
1624 | struct xfrm_state *x = (struct xfrm_state*)data; | |
1625 | ||
1626 | spin_lock(&x->lock); | |
1627 | ||
2717096a JHS |
1628 | if (x->km.state == XFRM_STATE_VALID) { |
1629 | if (xfrm_aevent_is_on()) | |
1630 | xfrm_replay_notify(x, XFRM_REPLAY_TIMEOUT); | |
1631 | else | |
1632 | x->xflags |= XFRM_TIME_DEFER; | |
1633 | } | |
f8cd5488 JHS |
1634 | |
1635 | spin_unlock(&x->lock); | |
1636 | } | |
1637 | ||
afeb14b4 PM |
1638 | int xfrm_replay_check(struct xfrm_state *x, |
1639 | struct sk_buff *skb, __be32 net_seq) | |
1da177e4 LT |
1640 | { |
1641 | u32 diff; | |
a252cc23 | 1642 | u32 seq = ntohl(net_seq); |
1da177e4 LT |
1643 | |
1644 | if (unlikely(seq == 0)) | |
afeb14b4 | 1645 | goto err; |
1da177e4 LT |
1646 | |
1647 | if (likely(seq > x->replay.seq)) | |
1648 | return 0; | |
1649 | ||
1650 | diff = x->replay.seq - seq; | |
4c4d51a7 HX |
1651 | if (diff >= min_t(unsigned int, x->props.replay_window, |
1652 | sizeof(x->replay.bitmap) * 8)) { | |
1da177e4 | 1653 | x->stats.replay_window++; |
afeb14b4 | 1654 | goto err; |
1da177e4 LT |
1655 | } |
1656 | ||
1657 | if (x->replay.bitmap & (1U << diff)) { | |
1658 | x->stats.replay++; | |
afeb14b4 | 1659 | goto err; |
1da177e4 LT |
1660 | } |
1661 | return 0; | |
afeb14b4 PM |
1662 | |
1663 | err: | |
1664 | xfrm_audit_state_replay(x, skb, net_seq); | |
1665 | return -EINVAL; | |
1da177e4 | 1666 | } |
1da177e4 | 1667 | |
61f4627b | 1668 | void xfrm_replay_advance(struct xfrm_state *x, __be32 net_seq) |
1da177e4 LT |
1669 | { |
1670 | u32 diff; | |
61f4627b | 1671 | u32 seq = ntohl(net_seq); |
1da177e4 LT |
1672 | |
1673 | if (seq > x->replay.seq) { | |
1674 | diff = seq - x->replay.seq; | |
1675 | if (diff < x->props.replay_window) | |
1676 | x->replay.bitmap = ((x->replay.bitmap) << diff) | 1; | |
1677 | else | |
1678 | x->replay.bitmap = 1; | |
1679 | x->replay.seq = seq; | |
1680 | } else { | |
1681 | diff = x->replay.seq - seq; | |
1682 | x->replay.bitmap |= (1U << diff); | |
1683 | } | |
f8cd5488 JHS |
1684 | |
1685 | if (xfrm_aevent_is_on()) | |
1686 | xfrm_replay_notify(x, XFRM_REPLAY_UPDATE); | |
1da177e4 | 1687 | } |
1da177e4 | 1688 | |
df01812e | 1689 | static LIST_HEAD(xfrm_km_list); |
1da177e4 LT |
1690 | static DEFINE_RWLOCK(xfrm_km_lock); |
1691 | ||
26b15dad | 1692 | void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) |
1da177e4 LT |
1693 | { |
1694 | struct xfrm_mgr *km; | |
1695 | ||
26b15dad JHS |
1696 | read_lock(&xfrm_km_lock); |
1697 | list_for_each_entry(km, &xfrm_km_list, list) | |
1698 | if (km->notify_policy) | |
1699 | km->notify_policy(xp, dir, c); | |
1700 | read_unlock(&xfrm_km_lock); | |
1701 | } | |
1da177e4 | 1702 | |
26b15dad JHS |
1703 | void km_state_notify(struct xfrm_state *x, struct km_event *c) |
1704 | { | |
1705 | struct xfrm_mgr *km; | |
1da177e4 LT |
1706 | read_lock(&xfrm_km_lock); |
1707 | list_for_each_entry(km, &xfrm_km_list, list) | |
26b15dad JHS |
1708 | if (km->notify) |
1709 | km->notify(x, c); | |
1da177e4 | 1710 | read_unlock(&xfrm_km_lock); |
26b15dad JHS |
1711 | } |
1712 | ||
1713 | EXPORT_SYMBOL(km_policy_notify); | |
1714 | EXPORT_SYMBOL(km_state_notify); | |
1715 | ||
53bc6b4d | 1716 | void km_state_expired(struct xfrm_state *x, int hard, u32 pid) |
26b15dad JHS |
1717 | { |
1718 | struct km_event c; | |
1719 | ||
bf08867f | 1720 | c.data.hard = hard; |
53bc6b4d | 1721 | c.pid = pid; |
f60f6b8f | 1722 | c.event = XFRM_MSG_EXPIRE; |
26b15dad | 1723 | km_state_notify(x, &c); |
1da177e4 LT |
1724 | |
1725 | if (hard) | |
1726 | wake_up(&km_waitq); | |
1727 | } | |
1728 | ||
53bc6b4d | 1729 | EXPORT_SYMBOL(km_state_expired); |
26b15dad JHS |
1730 | /* |
1731 | * We send to all registered managers regardless of failure | |
1732 | * We are happy with one success | |
1733 | */ | |
980ebd25 | 1734 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol) |
1da177e4 | 1735 | { |
26b15dad | 1736 | int err = -EINVAL, acqret; |
1da177e4 LT |
1737 | struct xfrm_mgr *km; |
1738 | ||
1739 | read_lock(&xfrm_km_lock); | |
1740 | list_for_each_entry(km, &xfrm_km_list, list) { | |
26b15dad JHS |
1741 | acqret = km->acquire(x, t, pol, XFRM_POLICY_OUT); |
1742 | if (!acqret) | |
1743 | err = acqret; | |
1da177e4 LT |
1744 | } |
1745 | read_unlock(&xfrm_km_lock); | |
1746 | return err; | |
1747 | } | |
980ebd25 | 1748 | EXPORT_SYMBOL(km_query); |
1da177e4 | 1749 | |
5d36b180 | 1750 | int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) |
1da177e4 LT |
1751 | { |
1752 | int err = -EINVAL; | |
1753 | struct xfrm_mgr *km; | |
1754 | ||
1755 | read_lock(&xfrm_km_lock); | |
1756 | list_for_each_entry(km, &xfrm_km_list, list) { | |
1757 | if (km->new_mapping) | |
1758 | err = km->new_mapping(x, ipaddr, sport); | |
1759 | if (!err) | |
1760 | break; | |
1761 | } | |
1762 | read_unlock(&xfrm_km_lock); | |
1763 | return err; | |
1764 | } | |
1765 | EXPORT_SYMBOL(km_new_mapping); | |
1766 | ||
6c5c8ca7 | 1767 | void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid) |
1da177e4 | 1768 | { |
26b15dad | 1769 | struct km_event c; |
1da177e4 | 1770 | |
bf08867f | 1771 | c.data.hard = hard; |
6c5c8ca7 | 1772 | c.pid = pid; |
f60f6b8f | 1773 | c.event = XFRM_MSG_POLEXPIRE; |
26b15dad | 1774 | km_policy_notify(pol, dir, &c); |
1da177e4 LT |
1775 | |
1776 | if (hard) | |
1777 | wake_up(&km_waitq); | |
1778 | } | |
a70fcb0b | 1779 | EXPORT_SYMBOL(km_policy_expired); |
1da177e4 | 1780 | |
2d60abc2 | 1781 | #ifdef CONFIG_XFRM_MIGRATE |
80c9abaa SS |
1782 | int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type, |
1783 | struct xfrm_migrate *m, int num_migrate) | |
1784 | { | |
1785 | int err = -EINVAL; | |
1786 | int ret; | |
1787 | struct xfrm_mgr *km; | |
1788 | ||
1789 | read_lock(&xfrm_km_lock); | |
1790 | list_for_each_entry(km, &xfrm_km_list, list) { | |
1791 | if (km->migrate) { | |
1792 | ret = km->migrate(sel, dir, type, m, num_migrate); | |
1793 | if (!ret) | |
1794 | err = ret; | |
1795 | } | |
1796 | } | |
1797 | read_unlock(&xfrm_km_lock); | |
1798 | return err; | |
1799 | } | |
1800 | EXPORT_SYMBOL(km_migrate); | |
2d60abc2 | 1801 | #endif |
80c9abaa | 1802 | |
97a64b45 MN |
1803 | int km_report(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr) |
1804 | { | |
1805 | int err = -EINVAL; | |
1806 | int ret; | |
1807 | struct xfrm_mgr *km; | |
1808 | ||
1809 | read_lock(&xfrm_km_lock); | |
1810 | list_for_each_entry(km, &xfrm_km_list, list) { | |
1811 | if (km->report) { | |
1812 | ret = km->report(proto, sel, addr); | |
1813 | if (!ret) | |
1814 | err = ret; | |
1815 | } | |
1816 | } | |
1817 | read_unlock(&xfrm_km_lock); | |
1818 | return err; | |
1819 | } | |
1820 | EXPORT_SYMBOL(km_report); | |
1821 | ||
1da177e4 LT |
1822 | int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) |
1823 | { | |
1824 | int err; | |
1825 | u8 *data; | |
1826 | struct xfrm_mgr *km; | |
1827 | struct xfrm_policy *pol = NULL; | |
1828 | ||
1829 | if (optlen <= 0 || optlen > PAGE_SIZE) | |
1830 | return -EMSGSIZE; | |
1831 | ||
1832 | data = kmalloc(optlen, GFP_KERNEL); | |
1833 | if (!data) | |
1834 | return -ENOMEM; | |
1835 | ||
1836 | err = -EFAULT; | |
1837 | if (copy_from_user(data, optval, optlen)) | |
1838 | goto out; | |
1839 | ||
1840 | err = -EINVAL; | |
1841 | read_lock(&xfrm_km_lock); | |
1842 | list_for_each_entry(km, &xfrm_km_list, list) { | |
cb969f07 | 1843 | pol = km->compile_policy(sk, optname, data, |
1da177e4 LT |
1844 | optlen, &err); |
1845 | if (err >= 0) | |
1846 | break; | |
1847 | } | |
1848 | read_unlock(&xfrm_km_lock); | |
1849 | ||
1850 | if (err >= 0) { | |
1851 | xfrm_sk_policy_insert(sk, err, pol); | |
1852 | xfrm_pol_put(pol); | |
1853 | err = 0; | |
1854 | } | |
1855 | ||
1856 | out: | |
1857 | kfree(data); | |
1858 | return err; | |
1859 | } | |
1860 | EXPORT_SYMBOL(xfrm_user_policy); | |
1861 | ||
1862 | int xfrm_register_km(struct xfrm_mgr *km) | |
1863 | { | |
1864 | write_lock_bh(&xfrm_km_lock); | |
1865 | list_add_tail(&km->list, &xfrm_km_list); | |
1866 | write_unlock_bh(&xfrm_km_lock); | |
1867 | return 0; | |
1868 | } | |
1869 | EXPORT_SYMBOL(xfrm_register_km); | |
1870 | ||
1871 | int xfrm_unregister_km(struct xfrm_mgr *km) | |
1872 | { | |
1873 | write_lock_bh(&xfrm_km_lock); | |
1874 | list_del(&km->list); | |
1875 | write_unlock_bh(&xfrm_km_lock); | |
1876 | return 0; | |
1877 | } | |
1878 | EXPORT_SYMBOL(xfrm_unregister_km); | |
1879 | ||
1880 | int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo) | |
1881 | { | |
1882 | int err = 0; | |
1883 | if (unlikely(afinfo == NULL)) | |
1884 | return -EINVAL; | |
1885 | if (unlikely(afinfo->family >= NPROTO)) | |
1886 | return -EAFNOSUPPORT; | |
f3111502 | 1887 | write_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1888 | if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL)) |
1889 | err = -ENOBUFS; | |
edcd5821 | 1890 | else |
1da177e4 | 1891 | xfrm_state_afinfo[afinfo->family] = afinfo; |
f3111502 | 1892 | write_unlock_bh(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1893 | return err; |
1894 | } | |
1895 | EXPORT_SYMBOL(xfrm_state_register_afinfo); | |
1896 | ||
1897 | int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo) | |
1898 | { | |
1899 | int err = 0; | |
1900 | if (unlikely(afinfo == NULL)) | |
1901 | return -EINVAL; | |
1902 | if (unlikely(afinfo->family >= NPROTO)) | |
1903 | return -EAFNOSUPPORT; | |
f3111502 | 1904 | write_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1905 | if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) { |
1906 | if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo)) | |
1907 | err = -EINVAL; | |
edcd5821 | 1908 | else |
1da177e4 | 1909 | xfrm_state_afinfo[afinfo->family] = NULL; |
1da177e4 | 1910 | } |
f3111502 | 1911 | write_unlock_bh(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1912 | return err; |
1913 | } | |
1914 | EXPORT_SYMBOL(xfrm_state_unregister_afinfo); | |
1915 | ||
17c2a42a | 1916 | static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family) |
1da177e4 LT |
1917 | { |
1918 | struct xfrm_state_afinfo *afinfo; | |
1919 | if (unlikely(family >= NPROTO)) | |
1920 | return NULL; | |
1921 | read_lock(&xfrm_state_afinfo_lock); | |
1922 | afinfo = xfrm_state_afinfo[family]; | |
546be240 HX |
1923 | if (unlikely(!afinfo)) |
1924 | read_unlock(&xfrm_state_afinfo_lock); | |
1da177e4 LT |
1925 | return afinfo; |
1926 | } | |
1927 | ||
17c2a42a | 1928 | static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo) |
9a429c49 | 1929 | __releases(xfrm_state_afinfo_lock) |
1da177e4 | 1930 | { |
546be240 | 1931 | read_unlock(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1932 | } |
1933 | ||
1934 | /* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */ | |
1935 | void xfrm_state_delete_tunnel(struct xfrm_state *x) | |
1936 | { | |
1937 | if (x->tunnel) { | |
1938 | struct xfrm_state *t = x->tunnel; | |
1939 | ||
1940 | if (atomic_read(&t->tunnel_users) == 2) | |
1941 | xfrm_state_delete(t); | |
1942 | atomic_dec(&t->tunnel_users); | |
1943 | xfrm_state_put(t); | |
1944 | x->tunnel = NULL; | |
1945 | } | |
1946 | } | |
1947 | EXPORT_SYMBOL(xfrm_state_delete_tunnel); | |
1948 | ||
1949 | int xfrm_state_mtu(struct xfrm_state *x, int mtu) | |
1950 | { | |
c5c25238 | 1951 | int res; |
1da177e4 | 1952 | |
c5c25238 PM |
1953 | spin_lock_bh(&x->lock); |
1954 | if (x->km.state == XFRM_STATE_VALID && | |
1955 | x->type && x->type->get_mtu) | |
1956 | res = x->type->get_mtu(x, mtu); | |
1957 | else | |
28121617 | 1958 | res = mtu - x->props.header_len; |
c5c25238 | 1959 | spin_unlock_bh(&x->lock); |
1da177e4 LT |
1960 | return res; |
1961 | } | |
1962 | ||
72cb6962 HX |
1963 | int xfrm_init_state(struct xfrm_state *x) |
1964 | { | |
d094cd83 HX |
1965 | struct xfrm_state_afinfo *afinfo; |
1966 | int family = x->props.family; | |
72cb6962 HX |
1967 | int err; |
1968 | ||
d094cd83 HX |
1969 | err = -EAFNOSUPPORT; |
1970 | afinfo = xfrm_state_get_afinfo(family); | |
1971 | if (!afinfo) | |
1972 | goto error; | |
1973 | ||
1974 | err = 0; | |
1975 | if (afinfo->init_flags) | |
1976 | err = afinfo->init_flags(x); | |
1977 | ||
1978 | xfrm_state_put_afinfo(afinfo); | |
1979 | ||
1980 | if (err) | |
1981 | goto error; | |
1982 | ||
1983 | err = -EPROTONOSUPPORT; | |
13996378 HX |
1984 | x->inner_mode = xfrm_get_mode(x->props.mode, x->sel.family); |
1985 | if (x->inner_mode == NULL) | |
1986 | goto error; | |
1987 | ||
1988 | if (!(x->inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) && | |
1989 | family != x->sel.family) | |
1990 | goto error; | |
1991 | ||
d094cd83 | 1992 | x->type = xfrm_get_type(x->id.proto, family); |
72cb6962 HX |
1993 | if (x->type == NULL) |
1994 | goto error; | |
1995 | ||
1996 | err = x->type->init_state(x); | |
1997 | if (err) | |
1998 | goto error; | |
1999 | ||
13996378 HX |
2000 | x->outer_mode = xfrm_get_mode(x->props.mode, family); |
2001 | if (x->outer_mode == NULL) | |
b59f45d0 HX |
2002 | goto error; |
2003 | ||
72cb6962 HX |
2004 | x->km.state = XFRM_STATE_VALID; |
2005 | ||
2006 | error: | |
2007 | return err; | |
2008 | } | |
2009 | ||
2010 | EXPORT_SYMBOL(xfrm_init_state); | |
a716c119 | 2011 | |
1da177e4 LT |
2012 | void __init xfrm_state_init(void) |
2013 | { | |
f034b5d4 DM |
2014 | unsigned int sz; |
2015 | ||
2016 | sz = sizeof(struct hlist_head) * 8; | |
2017 | ||
44e36b42 DM |
2018 | xfrm_state_bydst = xfrm_hash_alloc(sz); |
2019 | xfrm_state_bysrc = xfrm_hash_alloc(sz); | |
2020 | xfrm_state_byspi = xfrm_hash_alloc(sz); | |
f034b5d4 DM |
2021 | if (!xfrm_state_bydst || !xfrm_state_bysrc || !xfrm_state_byspi) |
2022 | panic("XFRM: Cannot allocate bydst/bysrc/byspi hashes."); | |
2023 | xfrm_state_hmask = ((sz / sizeof(struct hlist_head)) - 1); | |
1da177e4 | 2024 | |
c4028958 | 2025 | INIT_WORK(&xfrm_state_gc_work, xfrm_state_gc_task); |
1da177e4 LT |
2026 | } |
2027 | ||
ab5f5e8b | 2028 | #ifdef CONFIG_AUDITSYSCALL |
cf35f43e IJ |
2029 | static void xfrm_audit_helper_sainfo(struct xfrm_state *x, |
2030 | struct audit_buffer *audit_buf) | |
ab5f5e8b | 2031 | { |
68277acc PM |
2032 | struct xfrm_sec_ctx *ctx = x->security; |
2033 | u32 spi = ntohl(x->id.spi); | |
2034 | ||
2035 | if (ctx) | |
ab5f5e8b | 2036 | audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s", |
68277acc | 2037 | ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str); |
ab5f5e8b JL |
2038 | |
2039 | switch(x->props.family) { | |
2040 | case AF_INET: | |
68277acc PM |
2041 | audit_log_format(audit_buf, |
2042 | " src=" NIPQUAD_FMT " dst=" NIPQUAD_FMT, | |
ab5f5e8b JL |
2043 | NIPQUAD(x->props.saddr.a4), |
2044 | NIPQUAD(x->id.daddr.a4)); | |
2045 | break; | |
2046 | case AF_INET6: | |
68277acc PM |
2047 | audit_log_format(audit_buf, |
2048 | " src=" NIP6_FMT " dst=" NIP6_FMT, | |
2049 | NIP6(*(struct in6_addr *)x->props.saddr.a6), | |
2050 | NIP6(*(struct in6_addr *)x->id.daddr.a6)); | |
ab5f5e8b JL |
2051 | break; |
2052 | } | |
68277acc PM |
2053 | |
2054 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
ab5f5e8b JL |
2055 | } |
2056 | ||
cf35f43e IJ |
2057 | static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family, |
2058 | struct audit_buffer *audit_buf) | |
afeb14b4 PM |
2059 | { |
2060 | struct iphdr *iph4; | |
2061 | struct ipv6hdr *iph6; | |
2062 | ||
2063 | switch (family) { | |
2064 | case AF_INET: | |
2065 | iph4 = ip_hdr(skb); | |
2066 | audit_log_format(audit_buf, | |
2067 | " src=" NIPQUAD_FMT " dst=" NIPQUAD_FMT, | |
2068 | NIPQUAD(iph4->saddr), | |
2069 | NIPQUAD(iph4->daddr)); | |
2070 | break; | |
2071 | case AF_INET6: | |
2072 | iph6 = ipv6_hdr(skb); | |
2073 | audit_log_format(audit_buf, | |
2074 | " src=" NIP6_FMT " dst=" NIP6_FMT | |
2075 | " flowlbl=0x%x%x%x", | |
2076 | NIP6(iph6->saddr), | |
2077 | NIP6(iph6->daddr), | |
2078 | iph6->flow_lbl[0] & 0x0f, | |
2079 | iph6->flow_lbl[1], | |
2080 | iph6->flow_lbl[2]); | |
2081 | break; | |
2082 | } | |
2083 | } | |
2084 | ||
68277acc PM |
2085 | void xfrm_audit_state_add(struct xfrm_state *x, int result, |
2086 | u32 auid, u32 secid) | |
ab5f5e8b JL |
2087 | { |
2088 | struct audit_buffer *audit_buf; | |
ab5f5e8b | 2089 | |
afeb14b4 | 2090 | audit_buf = xfrm_audit_start("SAD-add"); |
ab5f5e8b JL |
2091 | if (audit_buf == NULL) |
2092 | return; | |
afeb14b4 PM |
2093 | xfrm_audit_helper_usrinfo(auid, secid, audit_buf); |
2094 | xfrm_audit_helper_sainfo(x, audit_buf); | |
2095 | audit_log_format(audit_buf, " res=%u", result); | |
ab5f5e8b JL |
2096 | audit_log_end(audit_buf); |
2097 | } | |
2098 | EXPORT_SYMBOL_GPL(xfrm_audit_state_add); | |
2099 | ||
68277acc PM |
2100 | void xfrm_audit_state_delete(struct xfrm_state *x, int result, |
2101 | u32 auid, u32 secid) | |
ab5f5e8b JL |
2102 | { |
2103 | struct audit_buffer *audit_buf; | |
ab5f5e8b | 2104 | |
afeb14b4 | 2105 | audit_buf = xfrm_audit_start("SAD-delete"); |
ab5f5e8b JL |
2106 | if (audit_buf == NULL) |
2107 | return; | |
afeb14b4 PM |
2108 | xfrm_audit_helper_usrinfo(auid, secid, audit_buf); |
2109 | xfrm_audit_helper_sainfo(x, audit_buf); | |
2110 | audit_log_format(audit_buf, " res=%u", result); | |
ab5f5e8b JL |
2111 | audit_log_end(audit_buf); |
2112 | } | |
2113 | EXPORT_SYMBOL_GPL(xfrm_audit_state_delete); | |
afeb14b4 PM |
2114 | |
2115 | void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
2116 | struct sk_buff *skb) | |
2117 | { | |
2118 | struct audit_buffer *audit_buf; | |
2119 | u32 spi; | |
2120 | ||
2121 | audit_buf = xfrm_audit_start("SA-replay-overflow"); | |
2122 | if (audit_buf == NULL) | |
2123 | return; | |
2124 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2125 | /* don't record the sequence number because it's inherent in this kind | |
2126 | * of audit message */ | |
2127 | spi = ntohl(x->id.spi); | |
2128 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
2129 | audit_log_end(audit_buf); | |
2130 | } | |
2131 | EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow); | |
2132 | ||
2133 | static void xfrm_audit_state_replay(struct xfrm_state *x, | |
2134 | struct sk_buff *skb, __be32 net_seq) | |
2135 | { | |
2136 | struct audit_buffer *audit_buf; | |
2137 | u32 spi; | |
2138 | ||
2139 | audit_buf = xfrm_audit_start("SA-replayed-pkt"); | |
2140 | if (audit_buf == NULL) | |
2141 | return; | |
2142 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2143 | spi = ntohl(x->id.spi); | |
2144 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2145 | spi, spi, ntohl(net_seq)); | |
2146 | audit_log_end(audit_buf); | |
2147 | } | |
2148 | ||
2149 | void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family) | |
2150 | { | |
2151 | struct audit_buffer *audit_buf; | |
2152 | ||
2153 | audit_buf = xfrm_audit_start("SA-notfound"); | |
2154 | if (audit_buf == NULL) | |
2155 | return; | |
2156 | xfrm_audit_helper_pktinfo(skb, family, audit_buf); | |
2157 | audit_log_end(audit_buf); | |
2158 | } | |
2159 | EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple); | |
2160 | ||
2161 | void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
2162 | __be32 net_spi, __be32 net_seq) | |
2163 | { | |
2164 | struct audit_buffer *audit_buf; | |
2165 | u32 spi; | |
2166 | ||
2167 | audit_buf = xfrm_audit_start("SA-notfound"); | |
2168 | if (audit_buf == NULL) | |
2169 | return; | |
2170 | xfrm_audit_helper_pktinfo(skb, family, audit_buf); | |
2171 | spi = ntohl(net_spi); | |
2172 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2173 | spi, spi, ntohl(net_seq)); | |
2174 | audit_log_end(audit_buf); | |
2175 | } | |
2176 | EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound); | |
2177 | ||
2178 | void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
2179 | struct sk_buff *skb, u8 proto) | |
2180 | { | |
2181 | struct audit_buffer *audit_buf; | |
2182 | __be32 net_spi; | |
2183 | __be32 net_seq; | |
2184 | ||
2185 | audit_buf = xfrm_audit_start("SA-icv-failure"); | |
2186 | if (audit_buf == NULL) | |
2187 | return; | |
2188 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2189 | if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) { | |
2190 | u32 spi = ntohl(net_spi); | |
2191 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2192 | spi, spi, ntohl(net_seq)); | |
2193 | } | |
2194 | audit_log_end(audit_buf); | |
2195 | } | |
2196 | EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail); | |
ab5f5e8b | 2197 | #endif /* CONFIG_AUDITSYSCALL */ |