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); | |
df9dcb45 KM |
392 | if (x->inner_mode_iaf) |
393 | xfrm_put_mode(x->inner_mode_iaf); | |
13996378 HX |
394 | if (x->outer_mode) |
395 | xfrm_put_mode(x->outer_mode); | |
1da177e4 LT |
396 | if (x->type) { |
397 | x->type->destructor(x); | |
398 | xfrm_put_type(x->type); | |
399 | } | |
df71837d | 400 | security_xfrm_state_free(x); |
1da177e4 LT |
401 | kfree(x); |
402 | } | |
403 | ||
c4028958 | 404 | static void xfrm_state_gc_task(struct work_struct *data) |
1da177e4 LT |
405 | { |
406 | struct xfrm_state *x; | |
8f126e37 DM |
407 | struct hlist_node *entry, *tmp; |
408 | struct hlist_head gc_list; | |
1da177e4 | 409 | |
1da177e4 | 410 | spin_lock_bh(&xfrm_state_gc_lock); |
8f126e37 DM |
411 | gc_list.first = xfrm_state_gc_list.first; |
412 | INIT_HLIST_HEAD(&xfrm_state_gc_list); | |
1da177e4 LT |
413 | spin_unlock_bh(&xfrm_state_gc_lock); |
414 | ||
8f126e37 | 415 | hlist_for_each_entry_safe(x, entry, tmp, &gc_list, bydst) |
1da177e4 | 416 | xfrm_state_gc_destroy(x); |
8f126e37 | 417 | |
1da177e4 LT |
418 | wake_up(&km_waitq); |
419 | } | |
420 | ||
421 | static inline unsigned long make_jiffies(long secs) | |
422 | { | |
423 | if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ) | |
424 | return MAX_SCHEDULE_TIMEOUT-1; | |
425 | else | |
a716c119 | 426 | return secs*HZ; |
1da177e4 LT |
427 | } |
428 | ||
429 | static void xfrm_timer_handler(unsigned long data) | |
430 | { | |
431 | struct xfrm_state *x = (struct xfrm_state*)data; | |
9d729f72 | 432 | unsigned long now = get_seconds(); |
1da177e4 LT |
433 | long next = LONG_MAX; |
434 | int warn = 0; | |
161a09e7 | 435 | int err = 0; |
1da177e4 LT |
436 | |
437 | spin_lock(&x->lock); | |
438 | if (x->km.state == XFRM_STATE_DEAD) | |
439 | goto out; | |
440 | if (x->km.state == XFRM_STATE_EXPIRED) | |
441 | goto expired; | |
442 | if (x->lft.hard_add_expires_seconds) { | |
443 | long tmo = x->lft.hard_add_expires_seconds + | |
444 | x->curlft.add_time - now; | |
445 | if (tmo <= 0) | |
446 | goto expired; | |
447 | if (tmo < next) | |
448 | next = tmo; | |
449 | } | |
450 | if (x->lft.hard_use_expires_seconds) { | |
451 | long tmo = x->lft.hard_use_expires_seconds + | |
452 | (x->curlft.use_time ? : now) - now; | |
453 | if (tmo <= 0) | |
454 | goto expired; | |
455 | if (tmo < next) | |
456 | next = tmo; | |
457 | } | |
458 | if (x->km.dying) | |
459 | goto resched; | |
460 | if (x->lft.soft_add_expires_seconds) { | |
461 | long tmo = x->lft.soft_add_expires_seconds + | |
462 | x->curlft.add_time - now; | |
463 | if (tmo <= 0) | |
464 | warn = 1; | |
465 | else if (tmo < next) | |
466 | next = tmo; | |
467 | } | |
468 | if (x->lft.soft_use_expires_seconds) { | |
469 | long tmo = x->lft.soft_use_expires_seconds + | |
470 | (x->curlft.use_time ? : now) - now; | |
471 | if (tmo <= 0) | |
472 | warn = 1; | |
473 | else if (tmo < next) | |
474 | next = tmo; | |
475 | } | |
476 | ||
4666faab | 477 | x->km.dying = warn; |
1da177e4 | 478 | if (warn) |
53bc6b4d | 479 | km_state_expired(x, 0, 0); |
1da177e4 | 480 | resched: |
a47f0ce0 DM |
481 | if (next != LONG_MAX) |
482 | mod_timer(&x->timer, jiffies + make_jiffies(next)); | |
483 | ||
1da177e4 LT |
484 | goto out; |
485 | ||
486 | expired: | |
487 | if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) { | |
488 | x->km.state = XFRM_STATE_EXPIRED; | |
489 | wake_up(&km_waitq); | |
490 | next = 2; | |
491 | goto resched; | |
492 | } | |
161a09e7 JL |
493 | |
494 | err = __xfrm_state_delete(x); | |
495 | if (!err && x->id.spi) | |
53bc6b4d | 496 | km_state_expired(x, 1, 0); |
1da177e4 | 497 | |
ab5f5e8b | 498 | xfrm_audit_state_delete(x, err ? 0 : 1, |
0c11b942 | 499 | audit_get_loginuid(current), 0); |
161a09e7 | 500 | |
1da177e4 LT |
501 | out: |
502 | spin_unlock(&x->lock); | |
1da177e4 LT |
503 | } |
504 | ||
0ac84752 DM |
505 | static void xfrm_replay_timer_handler(unsigned long data); |
506 | ||
1da177e4 LT |
507 | struct xfrm_state *xfrm_state_alloc(void) |
508 | { | |
509 | struct xfrm_state *x; | |
510 | ||
0da974f4 | 511 | x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC); |
1da177e4 LT |
512 | |
513 | if (x) { | |
1da177e4 LT |
514 | atomic_set(&x->refcnt, 1); |
515 | atomic_set(&x->tunnel_users, 0); | |
4c563f76 | 516 | INIT_LIST_HEAD(&x->all); |
8f126e37 DM |
517 | INIT_HLIST_NODE(&x->bydst); |
518 | INIT_HLIST_NODE(&x->bysrc); | |
519 | INIT_HLIST_NODE(&x->byspi); | |
b24b8a24 PE |
520 | setup_timer(&x->timer, xfrm_timer_handler, (unsigned long)x); |
521 | setup_timer(&x->rtimer, xfrm_replay_timer_handler, | |
522 | (unsigned long)x); | |
9d729f72 | 523 | x->curlft.add_time = get_seconds(); |
1da177e4 LT |
524 | x->lft.soft_byte_limit = XFRM_INF; |
525 | x->lft.soft_packet_limit = XFRM_INF; | |
526 | x->lft.hard_byte_limit = XFRM_INF; | |
527 | x->lft.hard_packet_limit = XFRM_INF; | |
f8cd5488 JHS |
528 | x->replay_maxage = 0; |
529 | x->replay_maxdiff = 0; | |
df9dcb45 KM |
530 | x->inner_mode = NULL; |
531 | x->inner_mode_iaf = NULL; | |
1da177e4 LT |
532 | spin_lock_init(&x->lock); |
533 | } | |
534 | return x; | |
535 | } | |
536 | EXPORT_SYMBOL(xfrm_state_alloc); | |
537 | ||
538 | void __xfrm_state_destroy(struct xfrm_state *x) | |
539 | { | |
540 | BUG_TRAP(x->km.state == XFRM_STATE_DEAD); | |
541 | ||
4c563f76 TT |
542 | spin_lock_bh(&xfrm_state_lock); |
543 | list_del(&x->all); | |
544 | spin_unlock_bh(&xfrm_state_lock); | |
545 | ||
1da177e4 | 546 | spin_lock_bh(&xfrm_state_gc_lock); |
8f126e37 | 547 | hlist_add_head(&x->bydst, &xfrm_state_gc_list); |
1da177e4 LT |
548 | spin_unlock_bh(&xfrm_state_gc_lock); |
549 | schedule_work(&xfrm_state_gc_work); | |
550 | } | |
551 | EXPORT_SYMBOL(__xfrm_state_destroy); | |
552 | ||
53bc6b4d | 553 | int __xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 554 | { |
26b15dad JHS |
555 | int err = -ESRCH; |
556 | ||
1da177e4 LT |
557 | if (x->km.state != XFRM_STATE_DEAD) { |
558 | x->km.state = XFRM_STATE_DEAD; | |
559 | spin_lock(&xfrm_state_lock); | |
8f126e37 | 560 | hlist_del(&x->bydst); |
8f126e37 | 561 | hlist_del(&x->bysrc); |
a47f0ce0 | 562 | if (x->id.spi) |
8f126e37 | 563 | hlist_del(&x->byspi); |
f034b5d4 | 564 | xfrm_state_num--; |
1da177e4 | 565 | spin_unlock(&xfrm_state_lock); |
1da177e4 | 566 | |
1da177e4 LT |
567 | /* All xfrm_state objects are created by xfrm_state_alloc. |
568 | * The xfrm_state_alloc call gives a reference, and that | |
569 | * is what we are dropping here. | |
570 | */ | |
5dba4797 | 571 | xfrm_state_put(x); |
26b15dad | 572 | err = 0; |
1da177e4 | 573 | } |
26b15dad JHS |
574 | |
575 | return err; | |
1da177e4 | 576 | } |
53bc6b4d | 577 | EXPORT_SYMBOL(__xfrm_state_delete); |
1da177e4 | 578 | |
26b15dad | 579 | int xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 580 | { |
26b15dad JHS |
581 | int err; |
582 | ||
1da177e4 | 583 | spin_lock_bh(&x->lock); |
26b15dad | 584 | err = __xfrm_state_delete(x); |
1da177e4 | 585 | spin_unlock_bh(&x->lock); |
26b15dad JHS |
586 | |
587 | return err; | |
1da177e4 LT |
588 | } |
589 | EXPORT_SYMBOL(xfrm_state_delete); | |
590 | ||
4aa2e62c JL |
591 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
592 | static inline int | |
593 | xfrm_state_flush_secctx_check(u8 proto, struct xfrm_audit *audit_info) | |
1da177e4 | 594 | { |
4aa2e62c JL |
595 | int i, err = 0; |
596 | ||
597 | for (i = 0; i <= xfrm_state_hmask; i++) { | |
598 | struct hlist_node *entry; | |
599 | struct xfrm_state *x; | |
600 | ||
601 | hlist_for_each_entry(x, entry, xfrm_state_bydst+i, bydst) { | |
602 | if (xfrm_id_proto_match(x->id.proto, proto) && | |
603 | (err = security_xfrm_state_delete(x)) != 0) { | |
ab5f5e8b JL |
604 | xfrm_audit_state_delete(x, 0, |
605 | audit_info->loginuid, | |
606 | audit_info->secid); | |
4aa2e62c JL |
607 | return err; |
608 | } | |
609 | } | |
610 | } | |
611 | ||
612 | return err; | |
613 | } | |
614 | #else | |
615 | static inline int | |
616 | xfrm_state_flush_secctx_check(u8 proto, struct xfrm_audit *audit_info) | |
617 | { | |
618 | return 0; | |
619 | } | |
620 | #endif | |
621 | ||
622 | int xfrm_state_flush(u8 proto, struct xfrm_audit *audit_info) | |
623 | { | |
624 | int i, err = 0; | |
1da177e4 LT |
625 | |
626 | spin_lock_bh(&xfrm_state_lock); | |
4aa2e62c JL |
627 | err = xfrm_state_flush_secctx_check(proto, audit_info); |
628 | if (err) | |
629 | goto out; | |
630 | ||
a9917c06 | 631 | for (i = 0; i <= xfrm_state_hmask; i++) { |
8f126e37 DM |
632 | struct hlist_node *entry; |
633 | struct xfrm_state *x; | |
1da177e4 | 634 | restart: |
8f126e37 | 635 | hlist_for_each_entry(x, entry, xfrm_state_bydst+i, bydst) { |
1da177e4 | 636 | if (!xfrm_state_kern(x) && |
5794708f | 637 | xfrm_id_proto_match(x->id.proto, proto)) { |
1da177e4 LT |
638 | xfrm_state_hold(x); |
639 | spin_unlock_bh(&xfrm_state_lock); | |
640 | ||
161a09e7 | 641 | err = xfrm_state_delete(x); |
ab5f5e8b JL |
642 | xfrm_audit_state_delete(x, err ? 0 : 1, |
643 | audit_info->loginuid, | |
644 | audit_info->secid); | |
1da177e4 LT |
645 | xfrm_state_put(x); |
646 | ||
647 | spin_lock_bh(&xfrm_state_lock); | |
648 | goto restart; | |
649 | } | |
650 | } | |
651 | } | |
4aa2e62c JL |
652 | err = 0; |
653 | ||
654 | out: | |
1da177e4 LT |
655 | spin_unlock_bh(&xfrm_state_lock); |
656 | wake_up(&km_waitq); | |
4aa2e62c | 657 | return err; |
1da177e4 LT |
658 | } |
659 | EXPORT_SYMBOL(xfrm_state_flush); | |
660 | ||
af11e316 | 661 | void xfrm_sad_getinfo(struct xfrmk_sadinfo *si) |
28d8909b JHS |
662 | { |
663 | spin_lock_bh(&xfrm_state_lock); | |
664 | si->sadcnt = xfrm_state_num; | |
665 | si->sadhcnt = xfrm_state_hmask; | |
666 | si->sadhmcnt = xfrm_state_hashmax; | |
667 | spin_unlock_bh(&xfrm_state_lock); | |
668 | } | |
669 | EXPORT_SYMBOL(xfrm_sad_getinfo); | |
670 | ||
1da177e4 LT |
671 | static int |
672 | xfrm_init_tempsel(struct xfrm_state *x, struct flowi *fl, | |
673 | struct xfrm_tmpl *tmpl, | |
674 | xfrm_address_t *daddr, xfrm_address_t *saddr, | |
675 | unsigned short family) | |
676 | { | |
677 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
678 | if (!afinfo) | |
679 | return -1; | |
680 | afinfo->init_tempsel(x, fl, tmpl, daddr, saddr); | |
681 | xfrm_state_put_afinfo(afinfo); | |
682 | return 0; | |
683 | } | |
684 | ||
a94cfd19 | 685 | static struct xfrm_state *__xfrm_state_lookup(xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family) |
edcd5821 DM |
686 | { |
687 | unsigned int h = xfrm_spi_hash(daddr, spi, proto, family); | |
688 | struct xfrm_state *x; | |
8f126e37 | 689 | struct hlist_node *entry; |
edcd5821 | 690 | |
8f126e37 | 691 | hlist_for_each_entry(x, entry, xfrm_state_byspi+h, byspi) { |
edcd5821 DM |
692 | if (x->props.family != family || |
693 | x->id.spi != spi || | |
694 | x->id.proto != proto) | |
695 | continue; | |
696 | ||
697 | switch (family) { | |
698 | case AF_INET: | |
699 | if (x->id.daddr.a4 != daddr->a4) | |
700 | continue; | |
701 | break; | |
702 | case AF_INET6: | |
703 | if (!ipv6_addr_equal((struct in6_addr *)daddr, | |
704 | (struct in6_addr *) | |
705 | x->id.daddr.a6)) | |
706 | continue; | |
707 | break; | |
3ff50b79 | 708 | } |
edcd5821 DM |
709 | |
710 | xfrm_state_hold(x); | |
711 | return x; | |
712 | } | |
713 | ||
714 | return NULL; | |
715 | } | |
716 | ||
717 | static struct xfrm_state *__xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family) | |
718 | { | |
667bbcb6 | 719 | unsigned int h = xfrm_src_hash(daddr, saddr, family); |
edcd5821 | 720 | struct xfrm_state *x; |
8f126e37 | 721 | struct hlist_node *entry; |
edcd5821 | 722 | |
8f126e37 | 723 | hlist_for_each_entry(x, entry, xfrm_state_bysrc+h, bysrc) { |
edcd5821 DM |
724 | if (x->props.family != family || |
725 | x->id.proto != proto) | |
726 | continue; | |
727 | ||
728 | switch (family) { | |
729 | case AF_INET: | |
730 | if (x->id.daddr.a4 != daddr->a4 || | |
731 | x->props.saddr.a4 != saddr->a4) | |
732 | continue; | |
733 | break; | |
734 | case AF_INET6: | |
735 | if (!ipv6_addr_equal((struct in6_addr *)daddr, | |
736 | (struct in6_addr *) | |
737 | x->id.daddr.a6) || | |
738 | !ipv6_addr_equal((struct in6_addr *)saddr, | |
739 | (struct in6_addr *) | |
740 | x->props.saddr.a6)) | |
741 | continue; | |
742 | break; | |
3ff50b79 | 743 | } |
edcd5821 DM |
744 | |
745 | xfrm_state_hold(x); | |
746 | return x; | |
747 | } | |
748 | ||
749 | return NULL; | |
750 | } | |
751 | ||
752 | static inline struct xfrm_state * | |
753 | __xfrm_state_locate(struct xfrm_state *x, int use_spi, int family) | |
754 | { | |
755 | if (use_spi) | |
756 | return __xfrm_state_lookup(&x->id.daddr, x->id.spi, | |
757 | x->id.proto, family); | |
758 | else | |
759 | return __xfrm_state_lookup_byaddr(&x->id.daddr, | |
760 | &x->props.saddr, | |
761 | x->id.proto, family); | |
762 | } | |
763 | ||
2fab22f2 PM |
764 | static void xfrm_hash_grow_check(int have_hash_collision) |
765 | { | |
766 | if (have_hash_collision && | |
767 | (xfrm_state_hmask + 1) < xfrm_state_hashmax && | |
768 | xfrm_state_num > xfrm_state_hmask) | |
769 | schedule_work(&xfrm_hash_work); | |
770 | } | |
771 | ||
1da177e4 | 772 | struct xfrm_state * |
a716c119 | 773 | xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, |
1da177e4 LT |
774 | struct flowi *fl, struct xfrm_tmpl *tmpl, |
775 | struct xfrm_policy *pol, int *err, | |
776 | unsigned short family) | |
777 | { | |
4bda4f25 | 778 | unsigned int h; |
8f126e37 | 779 | struct hlist_node *entry; |
1da177e4 LT |
780 | struct xfrm_state *x, *x0; |
781 | int acquire_in_progress = 0; | |
782 | int error = 0; | |
783 | struct xfrm_state *best = NULL; | |
a716c119 | 784 | |
1da177e4 | 785 | spin_lock_bh(&xfrm_state_lock); |
4bda4f25 | 786 | h = xfrm_dst_hash(daddr, saddr, tmpl->reqid, family); |
8f126e37 | 787 | hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) { |
1da177e4 LT |
788 | if (x->props.family == family && |
789 | x->props.reqid == tmpl->reqid && | |
fbd9a5b4 | 790 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
1da177e4 LT |
791 | xfrm_state_addr_check(x, daddr, saddr, family) && |
792 | tmpl->mode == x->props.mode && | |
793 | tmpl->id.proto == x->id.proto && | |
794 | (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) { | |
795 | /* Resolution logic: | |
796 | 1. There is a valid state with matching selector. | |
797 | Done. | |
798 | 2. Valid state with inappropriate selector. Skip. | |
799 | ||
800 | Entering area of "sysdeps". | |
801 | ||
802 | 3. If state is not valid, selector is temporary, | |
803 | it selects only session which triggered | |
804 | previous resolution. Key manager will do | |
805 | something to install a state with proper | |
806 | selector. | |
807 | */ | |
808 | if (x->km.state == XFRM_STATE_VALID) { | |
df9dcb45 | 809 | if ((x->sel.family && !xfrm_selector_match(&x->sel, fl, x->sel.family)) || |
e0d1caa7 | 810 | !security_xfrm_state_pol_flow_match(x, pol, fl)) |
1da177e4 LT |
811 | continue; |
812 | if (!best || | |
813 | best->km.dying > x->km.dying || | |
814 | (best->km.dying == x->km.dying && | |
815 | best->curlft.add_time < x->curlft.add_time)) | |
816 | best = x; | |
817 | } else if (x->km.state == XFRM_STATE_ACQ) { | |
818 | acquire_in_progress = 1; | |
819 | } else if (x->km.state == XFRM_STATE_ERROR || | |
820 | x->km.state == XFRM_STATE_EXPIRED) { | |
48b8d783 | 821 | if (xfrm_selector_match(&x->sel, fl, x->sel.family) && |
e0d1caa7 | 822 | security_xfrm_state_pol_flow_match(x, pol, fl)) |
1da177e4 LT |
823 | error = -ESRCH; |
824 | } | |
825 | } | |
826 | } | |
827 | ||
828 | x = best; | |
829 | if (!x && !error && !acquire_in_progress) { | |
5c5d281a | 830 | if (tmpl->id.spi && |
edcd5821 DM |
831 | (x0 = __xfrm_state_lookup(daddr, tmpl->id.spi, |
832 | tmpl->id.proto, family)) != NULL) { | |
1da177e4 LT |
833 | xfrm_state_put(x0); |
834 | error = -EEXIST; | |
835 | goto out; | |
836 | } | |
837 | x = xfrm_state_alloc(); | |
838 | if (x == NULL) { | |
839 | error = -ENOMEM; | |
840 | goto out; | |
841 | } | |
842 | /* Initialize temporary selector matching only | |
843 | * to current session. */ | |
844 | xfrm_init_tempsel(x, fl, tmpl, daddr, saddr, family); | |
845 | ||
e0d1caa7 VY |
846 | error = security_xfrm_state_alloc_acquire(x, pol->security, fl->secid); |
847 | if (error) { | |
848 | x->km.state = XFRM_STATE_DEAD; | |
849 | xfrm_state_put(x); | |
850 | x = NULL; | |
851 | goto out; | |
852 | } | |
853 | ||
1da177e4 LT |
854 | if (km_query(x, tmpl, pol) == 0) { |
855 | x->km.state = XFRM_STATE_ACQ; | |
8f126e37 | 856 | hlist_add_head(&x->bydst, xfrm_state_bydst+h); |
667bbcb6 | 857 | h = xfrm_src_hash(daddr, saddr, family); |
8f126e37 | 858 | hlist_add_head(&x->bysrc, xfrm_state_bysrc+h); |
1da177e4 LT |
859 | if (x->id.spi) { |
860 | h = xfrm_spi_hash(&x->id.daddr, x->id.spi, x->id.proto, family); | |
8f126e37 | 861 | hlist_add_head(&x->byspi, xfrm_state_byspi+h); |
1da177e4 | 862 | } |
01e67d08 DM |
863 | x->lft.hard_add_expires_seconds = sysctl_xfrm_acq_expires; |
864 | x->timer.expires = jiffies + sysctl_xfrm_acq_expires*HZ; | |
1da177e4 | 865 | add_timer(&x->timer); |
2fab22f2 PM |
866 | xfrm_state_num++; |
867 | xfrm_hash_grow_check(x->bydst.next != NULL); | |
1da177e4 LT |
868 | } else { |
869 | x->km.state = XFRM_STATE_DEAD; | |
870 | xfrm_state_put(x); | |
871 | x = NULL; | |
872 | error = -ESRCH; | |
873 | } | |
874 | } | |
875 | out: | |
876 | if (x) | |
877 | xfrm_state_hold(x); | |
878 | else | |
879 | *err = acquire_in_progress ? -EAGAIN : error; | |
880 | spin_unlock_bh(&xfrm_state_lock); | |
1da177e4 LT |
881 | return x; |
882 | } | |
883 | ||
628529b6 JHS |
884 | struct xfrm_state * |
885 | xfrm_stateonly_find(xfrm_address_t *daddr, xfrm_address_t *saddr, | |
886 | unsigned short family, u8 mode, u8 proto, u32 reqid) | |
887 | { | |
4bda4f25 | 888 | unsigned int h; |
628529b6 JHS |
889 | struct xfrm_state *rx = NULL, *x = NULL; |
890 | struct hlist_node *entry; | |
891 | ||
892 | spin_lock(&xfrm_state_lock); | |
4bda4f25 | 893 | h = xfrm_dst_hash(daddr, saddr, reqid, family); |
628529b6 JHS |
894 | hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) { |
895 | if (x->props.family == family && | |
896 | x->props.reqid == reqid && | |
897 | !(x->props.flags & XFRM_STATE_WILDRECV) && | |
898 | xfrm_state_addr_check(x, daddr, saddr, family) && | |
899 | mode == x->props.mode && | |
900 | proto == x->id.proto && | |
901 | x->km.state == XFRM_STATE_VALID) { | |
902 | rx = x; | |
903 | break; | |
904 | } | |
905 | } | |
906 | ||
907 | if (rx) | |
908 | xfrm_state_hold(rx); | |
909 | spin_unlock(&xfrm_state_lock); | |
910 | ||
911 | ||
912 | return rx; | |
913 | } | |
914 | EXPORT_SYMBOL(xfrm_stateonly_find); | |
915 | ||
1da177e4 LT |
916 | static void __xfrm_state_insert(struct xfrm_state *x) |
917 | { | |
a624c108 | 918 | unsigned int h; |
1da177e4 | 919 | |
9d4a706d DM |
920 | x->genid = ++xfrm_state_genid; |
921 | ||
4c563f76 TT |
922 | list_add_tail(&x->all, &xfrm_state_all); |
923 | ||
c1969f29 DM |
924 | h = xfrm_dst_hash(&x->id.daddr, &x->props.saddr, |
925 | x->props.reqid, x->props.family); | |
8f126e37 | 926 | hlist_add_head(&x->bydst, xfrm_state_bydst+h); |
1da177e4 | 927 | |
667bbcb6 | 928 | h = xfrm_src_hash(&x->id.daddr, &x->props.saddr, x->props.family); |
8f126e37 | 929 | hlist_add_head(&x->bysrc, xfrm_state_bysrc+h); |
1da177e4 | 930 | |
7b4dc360 | 931 | if (x->id.spi) { |
6c44e6b7 MN |
932 | h = xfrm_spi_hash(&x->id.daddr, x->id.spi, x->id.proto, |
933 | x->props.family); | |
934 | ||
8f126e37 | 935 | hlist_add_head(&x->byspi, xfrm_state_byspi+h); |
6c44e6b7 MN |
936 | } |
937 | ||
a47f0ce0 DM |
938 | mod_timer(&x->timer, jiffies + HZ); |
939 | if (x->replay_maxage) | |
940 | mod_timer(&x->rtimer, jiffies + x->replay_maxage); | |
f8cd5488 | 941 | |
1da177e4 | 942 | wake_up(&km_waitq); |
f034b5d4 DM |
943 | |
944 | xfrm_state_num++; | |
945 | ||
918049f0 | 946 | xfrm_hash_grow_check(x->bydst.next != NULL); |
1da177e4 LT |
947 | } |
948 | ||
c7f5ea3a DM |
949 | /* xfrm_state_lock is held */ |
950 | static void __xfrm_state_bump_genids(struct xfrm_state *xnew) | |
951 | { | |
952 | unsigned short family = xnew->props.family; | |
953 | u32 reqid = xnew->props.reqid; | |
954 | struct xfrm_state *x; | |
955 | struct hlist_node *entry; | |
956 | unsigned int h; | |
957 | ||
c1969f29 | 958 | h = xfrm_dst_hash(&xnew->id.daddr, &xnew->props.saddr, reqid, family); |
c7f5ea3a DM |
959 | hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) { |
960 | if (x->props.family == family && | |
961 | x->props.reqid == reqid && | |
c1969f29 DM |
962 | !xfrm_addr_cmp(&x->id.daddr, &xnew->id.daddr, family) && |
963 | !xfrm_addr_cmp(&x->props.saddr, &xnew->props.saddr, family)) | |
c7f5ea3a DM |
964 | x->genid = xfrm_state_genid; |
965 | } | |
966 | } | |
967 | ||
1da177e4 LT |
968 | void xfrm_state_insert(struct xfrm_state *x) |
969 | { | |
970 | spin_lock_bh(&xfrm_state_lock); | |
c7f5ea3a | 971 | __xfrm_state_bump_genids(x); |
1da177e4 LT |
972 | __xfrm_state_insert(x); |
973 | spin_unlock_bh(&xfrm_state_lock); | |
974 | } | |
975 | EXPORT_SYMBOL(xfrm_state_insert); | |
976 | ||
2770834c DM |
977 | /* xfrm_state_lock is held */ |
978 | 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) | |
979 | { | |
c1969f29 | 980 | unsigned int h = xfrm_dst_hash(daddr, saddr, reqid, family); |
8f126e37 | 981 | struct hlist_node *entry; |
2770834c DM |
982 | struct xfrm_state *x; |
983 | ||
8f126e37 | 984 | hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) { |
2770834c DM |
985 | if (x->props.reqid != reqid || |
986 | x->props.mode != mode || | |
987 | x->props.family != family || | |
988 | x->km.state != XFRM_STATE_ACQ || | |
75e252d9 JL |
989 | x->id.spi != 0 || |
990 | x->id.proto != proto) | |
2770834c DM |
991 | continue; |
992 | ||
993 | switch (family) { | |
994 | case AF_INET: | |
995 | if (x->id.daddr.a4 != daddr->a4 || | |
996 | x->props.saddr.a4 != saddr->a4) | |
997 | continue; | |
998 | break; | |
999 | case AF_INET6: | |
1000 | if (!ipv6_addr_equal((struct in6_addr *)x->id.daddr.a6, | |
1001 | (struct in6_addr *)daddr) || | |
1002 | !ipv6_addr_equal((struct in6_addr *) | |
1003 | x->props.saddr.a6, | |
1004 | (struct in6_addr *)saddr)) | |
1005 | continue; | |
1006 | break; | |
3ff50b79 | 1007 | } |
2770834c DM |
1008 | |
1009 | xfrm_state_hold(x); | |
1010 | return x; | |
1011 | } | |
1012 | ||
1013 | if (!create) | |
1014 | return NULL; | |
1015 | ||
1016 | x = xfrm_state_alloc(); | |
1017 | if (likely(x)) { | |
1018 | switch (family) { | |
1019 | case AF_INET: | |
1020 | x->sel.daddr.a4 = daddr->a4; | |
1021 | x->sel.saddr.a4 = saddr->a4; | |
1022 | x->sel.prefixlen_d = 32; | |
1023 | x->sel.prefixlen_s = 32; | |
1024 | x->props.saddr.a4 = saddr->a4; | |
1025 | x->id.daddr.a4 = daddr->a4; | |
1026 | break; | |
1027 | ||
1028 | case AF_INET6: | |
1029 | ipv6_addr_copy((struct in6_addr *)x->sel.daddr.a6, | |
1030 | (struct in6_addr *)daddr); | |
1031 | ipv6_addr_copy((struct in6_addr *)x->sel.saddr.a6, | |
1032 | (struct in6_addr *)saddr); | |
1033 | x->sel.prefixlen_d = 128; | |
1034 | x->sel.prefixlen_s = 128; | |
1035 | ipv6_addr_copy((struct in6_addr *)x->props.saddr.a6, | |
1036 | (struct in6_addr *)saddr); | |
1037 | ipv6_addr_copy((struct in6_addr *)x->id.daddr.a6, | |
1038 | (struct in6_addr *)daddr); | |
1039 | break; | |
3ff50b79 | 1040 | } |
2770834c DM |
1041 | |
1042 | x->km.state = XFRM_STATE_ACQ; | |
1043 | x->id.proto = proto; | |
1044 | x->props.family = family; | |
1045 | x->props.mode = mode; | |
1046 | x->props.reqid = reqid; | |
01e67d08 | 1047 | x->lft.hard_add_expires_seconds = sysctl_xfrm_acq_expires; |
2770834c | 1048 | xfrm_state_hold(x); |
01e67d08 | 1049 | x->timer.expires = jiffies + sysctl_xfrm_acq_expires*HZ; |
2770834c | 1050 | add_timer(&x->timer); |
8f126e37 | 1051 | hlist_add_head(&x->bydst, xfrm_state_bydst+h); |
667bbcb6 | 1052 | h = xfrm_src_hash(daddr, saddr, family); |
8f126e37 | 1053 | hlist_add_head(&x->bysrc, xfrm_state_bysrc+h); |
918049f0 DM |
1054 | |
1055 | xfrm_state_num++; | |
1056 | ||
1057 | xfrm_hash_grow_check(x->bydst.next != NULL); | |
2770834c DM |
1058 | } |
1059 | ||
1060 | return x; | |
1061 | } | |
1062 | ||
1da177e4 LT |
1063 | static struct xfrm_state *__xfrm_find_acq_byseq(u32 seq); |
1064 | ||
1065 | int xfrm_state_add(struct xfrm_state *x) | |
1066 | { | |
1da177e4 LT |
1067 | struct xfrm_state *x1; |
1068 | int family; | |
1069 | int err; | |
eb2971b6 | 1070 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
1da177e4 LT |
1071 | |
1072 | family = x->props.family; | |
1da177e4 LT |
1073 | |
1074 | spin_lock_bh(&xfrm_state_lock); | |
1075 | ||
edcd5821 | 1076 | x1 = __xfrm_state_locate(x, use_spi, family); |
1da177e4 LT |
1077 | if (x1) { |
1078 | xfrm_state_put(x1); | |
1079 | x1 = NULL; | |
1080 | err = -EEXIST; | |
1081 | goto out; | |
1082 | } | |
1083 | ||
eb2971b6 | 1084 | if (use_spi && x->km.seq) { |
1da177e4 | 1085 | x1 = __xfrm_find_acq_byseq(x->km.seq); |
75e252d9 JL |
1086 | if (x1 && ((x1->id.proto != x->id.proto) || |
1087 | xfrm_addr_cmp(&x1->id.daddr, &x->id.daddr, family))) { | |
1da177e4 LT |
1088 | xfrm_state_put(x1); |
1089 | x1 = NULL; | |
1090 | } | |
1091 | } | |
1092 | ||
eb2971b6 | 1093 | if (use_spi && !x1) |
2770834c DM |
1094 | x1 = __find_acq_core(family, x->props.mode, x->props.reqid, |
1095 | x->id.proto, | |
1096 | &x->id.daddr, &x->props.saddr, 0); | |
1da177e4 | 1097 | |
c7f5ea3a | 1098 | __xfrm_state_bump_genids(x); |
1da177e4 LT |
1099 | __xfrm_state_insert(x); |
1100 | err = 0; | |
1101 | ||
1102 | out: | |
1103 | spin_unlock_bh(&xfrm_state_lock); | |
1da177e4 LT |
1104 | |
1105 | if (x1) { | |
1106 | xfrm_state_delete(x1); | |
1107 | xfrm_state_put(x1); | |
1108 | } | |
1109 | ||
1110 | return err; | |
1111 | } | |
1112 | EXPORT_SYMBOL(xfrm_state_add); | |
1113 | ||
80c9abaa | 1114 | #ifdef CONFIG_XFRM_MIGRATE |
6666351d | 1115 | static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, int *errp) |
80c9abaa SS |
1116 | { |
1117 | int err = -ENOMEM; | |
1118 | struct xfrm_state *x = xfrm_state_alloc(); | |
1119 | if (!x) | |
1120 | goto error; | |
1121 | ||
1122 | memcpy(&x->id, &orig->id, sizeof(x->id)); | |
1123 | memcpy(&x->sel, &orig->sel, sizeof(x->sel)); | |
1124 | memcpy(&x->lft, &orig->lft, sizeof(x->lft)); | |
1125 | x->props.mode = orig->props.mode; | |
1126 | x->props.replay_window = orig->props.replay_window; | |
1127 | x->props.reqid = orig->props.reqid; | |
1128 | x->props.family = orig->props.family; | |
1129 | x->props.saddr = orig->props.saddr; | |
1130 | ||
1131 | if (orig->aalg) { | |
1132 | x->aalg = xfrm_algo_clone(orig->aalg); | |
1133 | if (!x->aalg) | |
1134 | goto error; | |
1135 | } | |
1136 | x->props.aalgo = orig->props.aalgo; | |
1137 | ||
1138 | if (orig->ealg) { | |
1139 | x->ealg = xfrm_algo_clone(orig->ealg); | |
1140 | if (!x->ealg) | |
1141 | goto error; | |
1142 | } | |
1143 | x->props.ealgo = orig->props.ealgo; | |
1144 | ||
1145 | if (orig->calg) { | |
1146 | x->calg = xfrm_algo_clone(orig->calg); | |
1147 | if (!x->calg) | |
1148 | goto error; | |
1149 | } | |
1150 | x->props.calgo = orig->props.calgo; | |
1151 | ||
a716c119 | 1152 | if (orig->encap) { |
80c9abaa SS |
1153 | x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL); |
1154 | if (!x->encap) | |
1155 | goto error; | |
1156 | } | |
1157 | ||
1158 | if (orig->coaddr) { | |
1159 | x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr), | |
1160 | GFP_KERNEL); | |
1161 | if (!x->coaddr) | |
1162 | goto error; | |
1163 | } | |
1164 | ||
1165 | err = xfrm_init_state(x); | |
1166 | if (err) | |
1167 | goto error; | |
1168 | ||
1169 | x->props.flags = orig->props.flags; | |
1170 | ||
1171 | x->curlft.add_time = orig->curlft.add_time; | |
1172 | x->km.state = orig->km.state; | |
1173 | x->km.seq = orig->km.seq; | |
1174 | ||
1175 | return x; | |
1176 | ||
1177 | error: | |
1178 | if (errp) | |
1179 | *errp = err; | |
1180 | if (x) { | |
1181 | kfree(x->aalg); | |
1182 | kfree(x->ealg); | |
1183 | kfree(x->calg); | |
1184 | kfree(x->encap); | |
1185 | kfree(x->coaddr); | |
1186 | } | |
1187 | kfree(x); | |
1188 | return NULL; | |
1189 | } | |
80c9abaa SS |
1190 | |
1191 | /* xfrm_state_lock is held */ | |
1192 | struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m) | |
1193 | { | |
1194 | unsigned int h; | |
1195 | struct xfrm_state *x; | |
1196 | struct hlist_node *entry; | |
1197 | ||
1198 | if (m->reqid) { | |
1199 | h = xfrm_dst_hash(&m->old_daddr, &m->old_saddr, | |
1200 | m->reqid, m->old_family); | |
1201 | hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) { | |
1202 | if (x->props.mode != m->mode || | |
1203 | x->id.proto != m->proto) | |
1204 | continue; | |
1205 | if (m->reqid && x->props.reqid != m->reqid) | |
1206 | continue; | |
1207 | if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr, | |
1208 | m->old_family) || | |
1209 | xfrm_addr_cmp(&x->props.saddr, &m->old_saddr, | |
1210 | m->old_family)) | |
1211 | continue; | |
1212 | xfrm_state_hold(x); | |
1213 | return x; | |
1214 | } | |
1215 | } else { | |
1216 | h = xfrm_src_hash(&m->old_daddr, &m->old_saddr, | |
1217 | m->old_family); | |
1218 | hlist_for_each_entry(x, entry, xfrm_state_bysrc+h, bysrc) { | |
1219 | if (x->props.mode != m->mode || | |
1220 | x->id.proto != m->proto) | |
1221 | continue; | |
1222 | if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr, | |
1223 | m->old_family) || | |
1224 | xfrm_addr_cmp(&x->props.saddr, &m->old_saddr, | |
1225 | m->old_family)) | |
1226 | continue; | |
1227 | xfrm_state_hold(x); | |
1228 | return x; | |
1229 | } | |
1230 | } | |
1231 | ||
a716c119 | 1232 | return NULL; |
80c9abaa SS |
1233 | } |
1234 | EXPORT_SYMBOL(xfrm_migrate_state_find); | |
1235 | ||
1236 | struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, | |
1237 | struct xfrm_migrate *m) | |
1238 | { | |
1239 | struct xfrm_state *xc; | |
1240 | int err; | |
1241 | ||
1242 | xc = xfrm_state_clone(x, &err); | |
1243 | if (!xc) | |
1244 | return NULL; | |
1245 | ||
1246 | memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr)); | |
1247 | memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr)); | |
1248 | ||
1249 | /* add state */ | |
1250 | if (!xfrm_addr_cmp(&x->id.daddr, &m->new_daddr, m->new_family)) { | |
1251 | /* a care is needed when the destination address of the | |
1252 | state is to be updated as it is a part of triplet */ | |
1253 | xfrm_state_insert(xc); | |
1254 | } else { | |
1255 | if ((err = xfrm_state_add(xc)) < 0) | |
1256 | goto error; | |
1257 | } | |
1258 | ||
1259 | return xc; | |
1260 | error: | |
1261 | kfree(xc); | |
1262 | return NULL; | |
1263 | } | |
1264 | EXPORT_SYMBOL(xfrm_state_migrate); | |
1265 | #endif | |
1266 | ||
1da177e4 LT |
1267 | int xfrm_state_update(struct xfrm_state *x) |
1268 | { | |
1da177e4 LT |
1269 | struct xfrm_state *x1; |
1270 | int err; | |
eb2971b6 | 1271 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
1da177e4 | 1272 | |
1da177e4 | 1273 | spin_lock_bh(&xfrm_state_lock); |
edcd5821 | 1274 | x1 = __xfrm_state_locate(x, use_spi, x->props.family); |
1da177e4 LT |
1275 | |
1276 | err = -ESRCH; | |
1277 | if (!x1) | |
1278 | goto out; | |
1279 | ||
1280 | if (xfrm_state_kern(x1)) { | |
1281 | xfrm_state_put(x1); | |
1282 | err = -EEXIST; | |
1283 | goto out; | |
1284 | } | |
1285 | ||
1286 | if (x1->km.state == XFRM_STATE_ACQ) { | |
1287 | __xfrm_state_insert(x); | |
1288 | x = NULL; | |
1289 | } | |
1290 | err = 0; | |
1291 | ||
1292 | out: | |
1293 | spin_unlock_bh(&xfrm_state_lock); | |
1da177e4 LT |
1294 | |
1295 | if (err) | |
1296 | return err; | |
1297 | ||
1298 | if (!x) { | |
1299 | xfrm_state_delete(x1); | |
1300 | xfrm_state_put(x1); | |
1301 | return 0; | |
1302 | } | |
1303 | ||
1304 | err = -EINVAL; | |
1305 | spin_lock_bh(&x1->lock); | |
1306 | if (likely(x1->km.state == XFRM_STATE_VALID)) { | |
1307 | if (x->encap && x1->encap) | |
1308 | memcpy(x1->encap, x->encap, sizeof(*x1->encap)); | |
060f02a3 NT |
1309 | if (x->coaddr && x1->coaddr) { |
1310 | memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr)); | |
1311 | } | |
1312 | if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel))) | |
1313 | memcpy(&x1->sel, &x->sel, sizeof(x1->sel)); | |
1da177e4 LT |
1314 | memcpy(&x1->lft, &x->lft, sizeof(x1->lft)); |
1315 | x1->km.dying = 0; | |
1316 | ||
a47f0ce0 | 1317 | mod_timer(&x1->timer, jiffies + HZ); |
1da177e4 LT |
1318 | if (x1->curlft.use_time) |
1319 | xfrm_state_check_expire(x1); | |
1320 | ||
1321 | err = 0; | |
1322 | } | |
1323 | spin_unlock_bh(&x1->lock); | |
1324 | ||
1325 | xfrm_state_put(x1); | |
1326 | ||
1327 | return err; | |
1328 | } | |
1329 | EXPORT_SYMBOL(xfrm_state_update); | |
1330 | ||
1331 | int xfrm_state_check_expire(struct xfrm_state *x) | |
1332 | { | |
1333 | if (!x->curlft.use_time) | |
9d729f72 | 1334 | x->curlft.use_time = get_seconds(); |
1da177e4 LT |
1335 | |
1336 | if (x->km.state != XFRM_STATE_VALID) | |
1337 | return -EINVAL; | |
1338 | ||
1339 | if (x->curlft.bytes >= x->lft.hard_byte_limit || | |
1340 | x->curlft.packets >= x->lft.hard_packet_limit) { | |
4666faab | 1341 | x->km.state = XFRM_STATE_EXPIRED; |
a47f0ce0 | 1342 | mod_timer(&x->timer, jiffies); |
1da177e4 LT |
1343 | return -EINVAL; |
1344 | } | |
1345 | ||
1346 | if (!x->km.dying && | |
1347 | (x->curlft.bytes >= x->lft.soft_byte_limit || | |
4666faab HX |
1348 | x->curlft.packets >= x->lft.soft_packet_limit)) { |
1349 | x->km.dying = 1; | |
53bc6b4d | 1350 | km_state_expired(x, 0, 0); |
4666faab | 1351 | } |
1da177e4 LT |
1352 | return 0; |
1353 | } | |
1354 | EXPORT_SYMBOL(xfrm_state_check_expire); | |
1355 | ||
1da177e4 | 1356 | struct xfrm_state * |
a94cfd19 | 1357 | xfrm_state_lookup(xfrm_address_t *daddr, __be32 spi, u8 proto, |
1da177e4 LT |
1358 | unsigned short family) |
1359 | { | |
1360 | struct xfrm_state *x; | |
1da177e4 LT |
1361 | |
1362 | spin_lock_bh(&xfrm_state_lock); | |
edcd5821 | 1363 | x = __xfrm_state_lookup(daddr, spi, proto, family); |
1da177e4 | 1364 | spin_unlock_bh(&xfrm_state_lock); |
1da177e4 LT |
1365 | return x; |
1366 | } | |
1367 | EXPORT_SYMBOL(xfrm_state_lookup); | |
1368 | ||
1369 | struct xfrm_state * | |
eb2971b6 MN |
1370 | xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, |
1371 | u8 proto, unsigned short family) | |
1372 | { | |
1373 | struct xfrm_state *x; | |
eb2971b6 MN |
1374 | |
1375 | spin_lock_bh(&xfrm_state_lock); | |
edcd5821 | 1376 | x = __xfrm_state_lookup_byaddr(daddr, saddr, proto, family); |
eb2971b6 | 1377 | spin_unlock_bh(&xfrm_state_lock); |
eb2971b6 MN |
1378 | return x; |
1379 | } | |
1380 | EXPORT_SYMBOL(xfrm_state_lookup_byaddr); | |
1381 | ||
1382 | struct xfrm_state * | |
a716c119 YH |
1383 | xfrm_find_acq(u8 mode, u32 reqid, u8 proto, |
1384 | xfrm_address_t *daddr, xfrm_address_t *saddr, | |
1da177e4 LT |
1385 | int create, unsigned short family) |
1386 | { | |
1387 | struct xfrm_state *x; | |
1da177e4 LT |
1388 | |
1389 | spin_lock_bh(&xfrm_state_lock); | |
2770834c | 1390 | x = __find_acq_core(family, mode, reqid, proto, daddr, saddr, create); |
1da177e4 | 1391 | spin_unlock_bh(&xfrm_state_lock); |
2770834c | 1392 | |
1da177e4 LT |
1393 | return x; |
1394 | } | |
1395 | EXPORT_SYMBOL(xfrm_find_acq); | |
1396 | ||
41a49cc3 MN |
1397 | #ifdef CONFIG_XFRM_SUB_POLICY |
1398 | int | |
1399 | xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, | |
1400 | unsigned short family) | |
1401 | { | |
1402 | int err = 0; | |
1403 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
1404 | if (!afinfo) | |
1405 | return -EAFNOSUPPORT; | |
1406 | ||
1407 | spin_lock_bh(&xfrm_state_lock); | |
1408 | if (afinfo->tmpl_sort) | |
1409 | err = afinfo->tmpl_sort(dst, src, n); | |
1410 | spin_unlock_bh(&xfrm_state_lock); | |
1411 | xfrm_state_put_afinfo(afinfo); | |
1412 | return err; | |
1413 | } | |
1414 | EXPORT_SYMBOL(xfrm_tmpl_sort); | |
1415 | ||
1416 | int | |
1417 | xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, | |
1418 | unsigned short family) | |
1419 | { | |
1420 | int err = 0; | |
1421 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
1422 | if (!afinfo) | |
1423 | return -EAFNOSUPPORT; | |
1424 | ||
1425 | spin_lock_bh(&xfrm_state_lock); | |
1426 | if (afinfo->state_sort) | |
1427 | err = afinfo->state_sort(dst, src, n); | |
1428 | spin_unlock_bh(&xfrm_state_lock); | |
1429 | xfrm_state_put_afinfo(afinfo); | |
1430 | return err; | |
1431 | } | |
1432 | EXPORT_SYMBOL(xfrm_state_sort); | |
1433 | #endif | |
1434 | ||
1da177e4 LT |
1435 | /* Silly enough, but I'm lazy to build resolution list */ |
1436 | ||
1437 | static struct xfrm_state *__xfrm_find_acq_byseq(u32 seq) | |
1438 | { | |
1439 | int i; | |
1da177e4 | 1440 | |
f034b5d4 | 1441 | for (i = 0; i <= xfrm_state_hmask; i++) { |
8f126e37 DM |
1442 | struct hlist_node *entry; |
1443 | struct xfrm_state *x; | |
1444 | ||
1445 | hlist_for_each_entry(x, entry, xfrm_state_bydst+i, bydst) { | |
1446 | if (x->km.seq == seq && | |
1447 | x->km.state == XFRM_STATE_ACQ) { | |
1da177e4 LT |
1448 | xfrm_state_hold(x); |
1449 | return x; | |
1450 | } | |
1451 | } | |
1452 | } | |
1453 | return NULL; | |
1454 | } | |
1455 | ||
1456 | struct xfrm_state *xfrm_find_acq_byseq(u32 seq) | |
1457 | { | |
1458 | struct xfrm_state *x; | |
1459 | ||
1460 | spin_lock_bh(&xfrm_state_lock); | |
1461 | x = __xfrm_find_acq_byseq(seq); | |
1462 | spin_unlock_bh(&xfrm_state_lock); | |
1463 | return x; | |
1464 | } | |
1465 | EXPORT_SYMBOL(xfrm_find_acq_byseq); | |
1466 | ||
1467 | u32 xfrm_get_acqseq(void) | |
1468 | { | |
1469 | u32 res; | |
1470 | static u32 acqseq; | |
1471 | static DEFINE_SPINLOCK(acqseq_lock); | |
1472 | ||
1473 | spin_lock_bh(&acqseq_lock); | |
1474 | res = (++acqseq ? : ++acqseq); | |
1475 | spin_unlock_bh(&acqseq_lock); | |
1476 | return res; | |
1477 | } | |
1478 | EXPORT_SYMBOL(xfrm_get_acqseq); | |
1479 | ||
658b219e | 1480 | int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high) |
1da177e4 | 1481 | { |
f034b5d4 | 1482 | unsigned int h; |
1da177e4 | 1483 | struct xfrm_state *x0; |
658b219e HX |
1484 | int err = -ENOENT; |
1485 | __be32 minspi = htonl(low); | |
1486 | __be32 maxspi = htonl(high); | |
1da177e4 | 1487 | |
658b219e HX |
1488 | spin_lock_bh(&x->lock); |
1489 | if (x->km.state == XFRM_STATE_DEAD) | |
1490 | goto unlock; | |
1491 | ||
1492 | err = 0; | |
1da177e4 | 1493 | if (x->id.spi) |
658b219e HX |
1494 | goto unlock; |
1495 | ||
1496 | err = -ENOENT; | |
1da177e4 LT |
1497 | |
1498 | if (minspi == maxspi) { | |
1499 | x0 = xfrm_state_lookup(&x->id.daddr, minspi, x->id.proto, x->props.family); | |
1500 | if (x0) { | |
1501 | xfrm_state_put(x0); | |
658b219e | 1502 | goto unlock; |
1da177e4 LT |
1503 | } |
1504 | x->id.spi = minspi; | |
1505 | } else { | |
1506 | u32 spi = 0; | |
26977b4e AV |
1507 | for (h=0; h<high-low+1; h++) { |
1508 | spi = low + net_random()%(high-low+1); | |
1da177e4 LT |
1509 | x0 = xfrm_state_lookup(&x->id.daddr, htonl(spi), x->id.proto, x->props.family); |
1510 | if (x0 == NULL) { | |
1511 | x->id.spi = htonl(spi); | |
1512 | break; | |
1513 | } | |
1514 | xfrm_state_put(x0); | |
1515 | } | |
1516 | } | |
1517 | if (x->id.spi) { | |
1518 | spin_lock_bh(&xfrm_state_lock); | |
1519 | h = xfrm_spi_hash(&x->id.daddr, x->id.spi, x->id.proto, x->props.family); | |
8f126e37 | 1520 | hlist_add_head(&x->byspi, xfrm_state_byspi+h); |
1da177e4 | 1521 | spin_unlock_bh(&xfrm_state_lock); |
658b219e HX |
1522 | |
1523 | err = 0; | |
1da177e4 | 1524 | } |
658b219e HX |
1525 | |
1526 | unlock: | |
1527 | spin_unlock_bh(&x->lock); | |
1528 | ||
1529 | return err; | |
1da177e4 LT |
1530 | } |
1531 | EXPORT_SYMBOL(xfrm_alloc_spi); | |
1532 | ||
4c563f76 TT |
1533 | int xfrm_state_walk(struct xfrm_state_walk *walk, |
1534 | int (*func)(struct xfrm_state *, int, void*), | |
1da177e4 LT |
1535 | void *data) |
1536 | { | |
4c563f76 | 1537 | struct xfrm_state *old, *x, *last = NULL; |
1da177e4 LT |
1538 | int err = 0; |
1539 | ||
4c563f76 TT |
1540 | if (walk->state == NULL && walk->count != 0) |
1541 | return 0; | |
1542 | ||
1543 | old = x = walk->state; | |
1544 | walk->state = NULL; | |
1da177e4 | 1545 | spin_lock_bh(&xfrm_state_lock); |
4c563f76 TT |
1546 | if (x == NULL) |
1547 | x = list_first_entry(&xfrm_state_all, struct xfrm_state, all); | |
1548 | list_for_each_entry_from(x, &xfrm_state_all, all) { | |
1549 | if (x->km.state == XFRM_STATE_DEAD) | |
1550 | continue; | |
1551 | if (!xfrm_id_proto_match(x->id.proto, walk->proto)) | |
1552 | continue; | |
1553 | if (last) { | |
1554 | err = func(last, walk->count, data); | |
1555 | if (err) { | |
1556 | xfrm_state_hold(last); | |
1557 | walk->state = last; | |
1558 | goto out; | |
94b9bb54 | 1559 | } |
1da177e4 | 1560 | } |
4c563f76 TT |
1561 | last = x; |
1562 | walk->count++; | |
1da177e4 | 1563 | } |
4c563f76 | 1564 | if (walk->count == 0) { |
1da177e4 LT |
1565 | err = -ENOENT; |
1566 | goto out; | |
1567 | } | |
4c563f76 TT |
1568 | if (last) |
1569 | err = func(last, 0, data); | |
1da177e4 LT |
1570 | out: |
1571 | spin_unlock_bh(&xfrm_state_lock); | |
4c563f76 TT |
1572 | if (old != NULL) |
1573 | xfrm_state_put(old); | |
1da177e4 LT |
1574 | return err; |
1575 | } | |
1576 | EXPORT_SYMBOL(xfrm_state_walk); | |
1577 | ||
f8cd5488 JHS |
1578 | |
1579 | void xfrm_replay_notify(struct xfrm_state *x, int event) | |
1580 | { | |
1581 | struct km_event c; | |
1582 | /* we send notify messages in case | |
1583 | * 1. we updated on of the sequence numbers, and the seqno difference | |
1584 | * is at least x->replay_maxdiff, in this case we also update the | |
1585 | * timeout of our timer function | |
1586 | * 2. if x->replay_maxage has elapsed since last update, | |
1587 | * and there were changes | |
1588 | * | |
1589 | * The state structure must be locked! | |
1590 | */ | |
1591 | ||
1592 | switch (event) { | |
1593 | case XFRM_REPLAY_UPDATE: | |
1594 | if (x->replay_maxdiff && | |
1595 | (x->replay.seq - x->preplay.seq < x->replay_maxdiff) && | |
2717096a JHS |
1596 | (x->replay.oseq - x->preplay.oseq < x->replay_maxdiff)) { |
1597 | if (x->xflags & XFRM_TIME_DEFER) | |
1598 | event = XFRM_REPLAY_TIMEOUT; | |
1599 | else | |
1600 | return; | |
1601 | } | |
f8cd5488 JHS |
1602 | |
1603 | break; | |
1604 | ||
1605 | case XFRM_REPLAY_TIMEOUT: | |
1606 | if ((x->replay.seq == x->preplay.seq) && | |
1607 | (x->replay.bitmap == x->preplay.bitmap) && | |
2717096a JHS |
1608 | (x->replay.oseq == x->preplay.oseq)) { |
1609 | x->xflags |= XFRM_TIME_DEFER; | |
f8cd5488 | 1610 | return; |
2717096a | 1611 | } |
f8cd5488 JHS |
1612 | |
1613 | break; | |
1614 | } | |
1615 | ||
1616 | memcpy(&x->preplay, &x->replay, sizeof(struct xfrm_replay_state)); | |
1617 | c.event = XFRM_MSG_NEWAE; | |
1618 | c.data.aevent = event; | |
1619 | km_state_notify(x, &c); | |
1620 | ||
f8cd5488 | 1621 | if (x->replay_maxage && |
a47f0ce0 | 1622 | !mod_timer(&x->rtimer, jiffies + x->replay_maxage)) |
2717096a | 1623 | x->xflags &= ~XFRM_TIME_DEFER; |
f8cd5488 JHS |
1624 | } |
1625 | ||
1626 | static void xfrm_replay_timer_handler(unsigned long data) | |
1627 | { | |
1628 | struct xfrm_state *x = (struct xfrm_state*)data; | |
1629 | ||
1630 | spin_lock(&x->lock); | |
1631 | ||
2717096a JHS |
1632 | if (x->km.state == XFRM_STATE_VALID) { |
1633 | if (xfrm_aevent_is_on()) | |
1634 | xfrm_replay_notify(x, XFRM_REPLAY_TIMEOUT); | |
1635 | else | |
1636 | x->xflags |= XFRM_TIME_DEFER; | |
1637 | } | |
f8cd5488 JHS |
1638 | |
1639 | spin_unlock(&x->lock); | |
1640 | } | |
1641 | ||
afeb14b4 PM |
1642 | int xfrm_replay_check(struct xfrm_state *x, |
1643 | struct sk_buff *skb, __be32 net_seq) | |
1da177e4 LT |
1644 | { |
1645 | u32 diff; | |
a252cc23 | 1646 | u32 seq = ntohl(net_seq); |
1da177e4 LT |
1647 | |
1648 | if (unlikely(seq == 0)) | |
afeb14b4 | 1649 | goto err; |
1da177e4 LT |
1650 | |
1651 | if (likely(seq > x->replay.seq)) | |
1652 | return 0; | |
1653 | ||
1654 | diff = x->replay.seq - seq; | |
4c4d51a7 HX |
1655 | if (diff >= min_t(unsigned int, x->props.replay_window, |
1656 | sizeof(x->replay.bitmap) * 8)) { | |
1da177e4 | 1657 | x->stats.replay_window++; |
afeb14b4 | 1658 | goto err; |
1da177e4 LT |
1659 | } |
1660 | ||
1661 | if (x->replay.bitmap & (1U << diff)) { | |
1662 | x->stats.replay++; | |
afeb14b4 | 1663 | goto err; |
1da177e4 LT |
1664 | } |
1665 | return 0; | |
afeb14b4 PM |
1666 | |
1667 | err: | |
1668 | xfrm_audit_state_replay(x, skb, net_seq); | |
1669 | return -EINVAL; | |
1da177e4 | 1670 | } |
1da177e4 | 1671 | |
61f4627b | 1672 | void xfrm_replay_advance(struct xfrm_state *x, __be32 net_seq) |
1da177e4 LT |
1673 | { |
1674 | u32 diff; | |
61f4627b | 1675 | u32 seq = ntohl(net_seq); |
1da177e4 LT |
1676 | |
1677 | if (seq > x->replay.seq) { | |
1678 | diff = seq - x->replay.seq; | |
1679 | if (diff < x->props.replay_window) | |
1680 | x->replay.bitmap = ((x->replay.bitmap) << diff) | 1; | |
1681 | else | |
1682 | x->replay.bitmap = 1; | |
1683 | x->replay.seq = seq; | |
1684 | } else { | |
1685 | diff = x->replay.seq - seq; | |
1686 | x->replay.bitmap |= (1U << diff); | |
1687 | } | |
f8cd5488 JHS |
1688 | |
1689 | if (xfrm_aevent_is_on()) | |
1690 | xfrm_replay_notify(x, XFRM_REPLAY_UPDATE); | |
1da177e4 | 1691 | } |
1da177e4 | 1692 | |
df01812e | 1693 | static LIST_HEAD(xfrm_km_list); |
1da177e4 LT |
1694 | static DEFINE_RWLOCK(xfrm_km_lock); |
1695 | ||
26b15dad | 1696 | void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) |
1da177e4 LT |
1697 | { |
1698 | struct xfrm_mgr *km; | |
1699 | ||
26b15dad JHS |
1700 | read_lock(&xfrm_km_lock); |
1701 | list_for_each_entry(km, &xfrm_km_list, list) | |
1702 | if (km->notify_policy) | |
1703 | km->notify_policy(xp, dir, c); | |
1704 | read_unlock(&xfrm_km_lock); | |
1705 | } | |
1da177e4 | 1706 | |
26b15dad JHS |
1707 | void km_state_notify(struct xfrm_state *x, struct km_event *c) |
1708 | { | |
1709 | struct xfrm_mgr *km; | |
1da177e4 LT |
1710 | read_lock(&xfrm_km_lock); |
1711 | list_for_each_entry(km, &xfrm_km_list, list) | |
26b15dad JHS |
1712 | if (km->notify) |
1713 | km->notify(x, c); | |
1da177e4 | 1714 | read_unlock(&xfrm_km_lock); |
26b15dad JHS |
1715 | } |
1716 | ||
1717 | EXPORT_SYMBOL(km_policy_notify); | |
1718 | EXPORT_SYMBOL(km_state_notify); | |
1719 | ||
53bc6b4d | 1720 | void km_state_expired(struct xfrm_state *x, int hard, u32 pid) |
26b15dad JHS |
1721 | { |
1722 | struct km_event c; | |
1723 | ||
bf08867f | 1724 | c.data.hard = hard; |
53bc6b4d | 1725 | c.pid = pid; |
f60f6b8f | 1726 | c.event = XFRM_MSG_EXPIRE; |
26b15dad | 1727 | km_state_notify(x, &c); |
1da177e4 LT |
1728 | |
1729 | if (hard) | |
1730 | wake_up(&km_waitq); | |
1731 | } | |
1732 | ||
53bc6b4d | 1733 | EXPORT_SYMBOL(km_state_expired); |
26b15dad JHS |
1734 | /* |
1735 | * We send to all registered managers regardless of failure | |
1736 | * We are happy with one success | |
1737 | */ | |
980ebd25 | 1738 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol) |
1da177e4 | 1739 | { |
26b15dad | 1740 | int err = -EINVAL, acqret; |
1da177e4 LT |
1741 | struct xfrm_mgr *km; |
1742 | ||
1743 | read_lock(&xfrm_km_lock); | |
1744 | list_for_each_entry(km, &xfrm_km_list, list) { | |
26b15dad JHS |
1745 | acqret = km->acquire(x, t, pol, XFRM_POLICY_OUT); |
1746 | if (!acqret) | |
1747 | err = acqret; | |
1da177e4 LT |
1748 | } |
1749 | read_unlock(&xfrm_km_lock); | |
1750 | return err; | |
1751 | } | |
980ebd25 | 1752 | EXPORT_SYMBOL(km_query); |
1da177e4 | 1753 | |
5d36b180 | 1754 | int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) |
1da177e4 LT |
1755 | { |
1756 | int err = -EINVAL; | |
1757 | struct xfrm_mgr *km; | |
1758 | ||
1759 | read_lock(&xfrm_km_lock); | |
1760 | list_for_each_entry(km, &xfrm_km_list, list) { | |
1761 | if (km->new_mapping) | |
1762 | err = km->new_mapping(x, ipaddr, sport); | |
1763 | if (!err) | |
1764 | break; | |
1765 | } | |
1766 | read_unlock(&xfrm_km_lock); | |
1767 | return err; | |
1768 | } | |
1769 | EXPORT_SYMBOL(km_new_mapping); | |
1770 | ||
6c5c8ca7 | 1771 | void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid) |
1da177e4 | 1772 | { |
26b15dad | 1773 | struct km_event c; |
1da177e4 | 1774 | |
bf08867f | 1775 | c.data.hard = hard; |
6c5c8ca7 | 1776 | c.pid = pid; |
f60f6b8f | 1777 | c.event = XFRM_MSG_POLEXPIRE; |
26b15dad | 1778 | km_policy_notify(pol, dir, &c); |
1da177e4 LT |
1779 | |
1780 | if (hard) | |
1781 | wake_up(&km_waitq); | |
1782 | } | |
a70fcb0b | 1783 | EXPORT_SYMBOL(km_policy_expired); |
1da177e4 | 1784 | |
2d60abc2 | 1785 | #ifdef CONFIG_XFRM_MIGRATE |
80c9abaa SS |
1786 | int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type, |
1787 | struct xfrm_migrate *m, int num_migrate) | |
1788 | { | |
1789 | int err = -EINVAL; | |
1790 | int ret; | |
1791 | struct xfrm_mgr *km; | |
1792 | ||
1793 | read_lock(&xfrm_km_lock); | |
1794 | list_for_each_entry(km, &xfrm_km_list, list) { | |
1795 | if (km->migrate) { | |
1796 | ret = km->migrate(sel, dir, type, m, num_migrate); | |
1797 | if (!ret) | |
1798 | err = ret; | |
1799 | } | |
1800 | } | |
1801 | read_unlock(&xfrm_km_lock); | |
1802 | return err; | |
1803 | } | |
1804 | EXPORT_SYMBOL(km_migrate); | |
2d60abc2 | 1805 | #endif |
80c9abaa | 1806 | |
97a64b45 MN |
1807 | int km_report(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr) |
1808 | { | |
1809 | int err = -EINVAL; | |
1810 | int ret; | |
1811 | struct xfrm_mgr *km; | |
1812 | ||
1813 | read_lock(&xfrm_km_lock); | |
1814 | list_for_each_entry(km, &xfrm_km_list, list) { | |
1815 | if (km->report) { | |
1816 | ret = km->report(proto, sel, addr); | |
1817 | if (!ret) | |
1818 | err = ret; | |
1819 | } | |
1820 | } | |
1821 | read_unlock(&xfrm_km_lock); | |
1822 | return err; | |
1823 | } | |
1824 | EXPORT_SYMBOL(km_report); | |
1825 | ||
1da177e4 LT |
1826 | int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) |
1827 | { | |
1828 | int err; | |
1829 | u8 *data; | |
1830 | struct xfrm_mgr *km; | |
1831 | struct xfrm_policy *pol = NULL; | |
1832 | ||
1833 | if (optlen <= 0 || optlen > PAGE_SIZE) | |
1834 | return -EMSGSIZE; | |
1835 | ||
1836 | data = kmalloc(optlen, GFP_KERNEL); | |
1837 | if (!data) | |
1838 | return -ENOMEM; | |
1839 | ||
1840 | err = -EFAULT; | |
1841 | if (copy_from_user(data, optval, optlen)) | |
1842 | goto out; | |
1843 | ||
1844 | err = -EINVAL; | |
1845 | read_lock(&xfrm_km_lock); | |
1846 | list_for_each_entry(km, &xfrm_km_list, list) { | |
cb969f07 | 1847 | pol = km->compile_policy(sk, optname, data, |
1da177e4 LT |
1848 | optlen, &err); |
1849 | if (err >= 0) | |
1850 | break; | |
1851 | } | |
1852 | read_unlock(&xfrm_km_lock); | |
1853 | ||
1854 | if (err >= 0) { | |
1855 | xfrm_sk_policy_insert(sk, err, pol); | |
1856 | xfrm_pol_put(pol); | |
1857 | err = 0; | |
1858 | } | |
1859 | ||
1860 | out: | |
1861 | kfree(data); | |
1862 | return err; | |
1863 | } | |
1864 | EXPORT_SYMBOL(xfrm_user_policy); | |
1865 | ||
1866 | int xfrm_register_km(struct xfrm_mgr *km) | |
1867 | { | |
1868 | write_lock_bh(&xfrm_km_lock); | |
1869 | list_add_tail(&km->list, &xfrm_km_list); | |
1870 | write_unlock_bh(&xfrm_km_lock); | |
1871 | return 0; | |
1872 | } | |
1873 | EXPORT_SYMBOL(xfrm_register_km); | |
1874 | ||
1875 | int xfrm_unregister_km(struct xfrm_mgr *km) | |
1876 | { | |
1877 | write_lock_bh(&xfrm_km_lock); | |
1878 | list_del(&km->list); | |
1879 | write_unlock_bh(&xfrm_km_lock); | |
1880 | return 0; | |
1881 | } | |
1882 | EXPORT_SYMBOL(xfrm_unregister_km); | |
1883 | ||
1884 | int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo) | |
1885 | { | |
1886 | int err = 0; | |
1887 | if (unlikely(afinfo == NULL)) | |
1888 | return -EINVAL; | |
1889 | if (unlikely(afinfo->family >= NPROTO)) | |
1890 | return -EAFNOSUPPORT; | |
f3111502 | 1891 | write_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1892 | if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL)) |
1893 | err = -ENOBUFS; | |
edcd5821 | 1894 | else |
1da177e4 | 1895 | xfrm_state_afinfo[afinfo->family] = afinfo; |
f3111502 | 1896 | write_unlock_bh(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1897 | return err; |
1898 | } | |
1899 | EXPORT_SYMBOL(xfrm_state_register_afinfo); | |
1900 | ||
1901 | int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo) | |
1902 | { | |
1903 | int err = 0; | |
1904 | if (unlikely(afinfo == NULL)) | |
1905 | return -EINVAL; | |
1906 | if (unlikely(afinfo->family >= NPROTO)) | |
1907 | return -EAFNOSUPPORT; | |
f3111502 | 1908 | write_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1909 | if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) { |
1910 | if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo)) | |
1911 | err = -EINVAL; | |
edcd5821 | 1912 | else |
1da177e4 | 1913 | xfrm_state_afinfo[afinfo->family] = NULL; |
1da177e4 | 1914 | } |
f3111502 | 1915 | write_unlock_bh(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1916 | return err; |
1917 | } | |
1918 | EXPORT_SYMBOL(xfrm_state_unregister_afinfo); | |
1919 | ||
17c2a42a | 1920 | static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family) |
1da177e4 LT |
1921 | { |
1922 | struct xfrm_state_afinfo *afinfo; | |
1923 | if (unlikely(family >= NPROTO)) | |
1924 | return NULL; | |
1925 | read_lock(&xfrm_state_afinfo_lock); | |
1926 | afinfo = xfrm_state_afinfo[family]; | |
546be240 HX |
1927 | if (unlikely(!afinfo)) |
1928 | read_unlock(&xfrm_state_afinfo_lock); | |
1da177e4 LT |
1929 | return afinfo; |
1930 | } | |
1931 | ||
17c2a42a | 1932 | static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo) |
9a429c49 | 1933 | __releases(xfrm_state_afinfo_lock) |
1da177e4 | 1934 | { |
546be240 | 1935 | read_unlock(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1936 | } |
1937 | ||
1938 | /* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */ | |
1939 | void xfrm_state_delete_tunnel(struct xfrm_state *x) | |
1940 | { | |
1941 | if (x->tunnel) { | |
1942 | struct xfrm_state *t = x->tunnel; | |
1943 | ||
1944 | if (atomic_read(&t->tunnel_users) == 2) | |
1945 | xfrm_state_delete(t); | |
1946 | atomic_dec(&t->tunnel_users); | |
1947 | xfrm_state_put(t); | |
1948 | x->tunnel = NULL; | |
1949 | } | |
1950 | } | |
1951 | EXPORT_SYMBOL(xfrm_state_delete_tunnel); | |
1952 | ||
1953 | int xfrm_state_mtu(struct xfrm_state *x, int mtu) | |
1954 | { | |
c5c25238 | 1955 | int res; |
1da177e4 | 1956 | |
c5c25238 PM |
1957 | spin_lock_bh(&x->lock); |
1958 | if (x->km.state == XFRM_STATE_VALID && | |
1959 | x->type && x->type->get_mtu) | |
1960 | res = x->type->get_mtu(x, mtu); | |
1961 | else | |
28121617 | 1962 | res = mtu - x->props.header_len; |
c5c25238 | 1963 | spin_unlock_bh(&x->lock); |
1da177e4 LT |
1964 | return res; |
1965 | } | |
1966 | ||
72cb6962 HX |
1967 | int xfrm_init_state(struct xfrm_state *x) |
1968 | { | |
d094cd83 | 1969 | struct xfrm_state_afinfo *afinfo; |
df9dcb45 | 1970 | struct xfrm_mode *inner_mode; |
d094cd83 | 1971 | int family = x->props.family; |
72cb6962 HX |
1972 | int err; |
1973 | ||
d094cd83 HX |
1974 | err = -EAFNOSUPPORT; |
1975 | afinfo = xfrm_state_get_afinfo(family); | |
1976 | if (!afinfo) | |
1977 | goto error; | |
1978 | ||
1979 | err = 0; | |
1980 | if (afinfo->init_flags) | |
1981 | err = afinfo->init_flags(x); | |
1982 | ||
1983 | xfrm_state_put_afinfo(afinfo); | |
1984 | ||
1985 | if (err) | |
1986 | goto error; | |
1987 | ||
1988 | err = -EPROTONOSUPPORT; | |
13996378 | 1989 | |
df9dcb45 KM |
1990 | if (x->sel.family != AF_UNSPEC) { |
1991 | inner_mode = xfrm_get_mode(x->props.mode, x->sel.family); | |
1992 | if (inner_mode == NULL) | |
1993 | goto error; | |
1994 | ||
1995 | if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) && | |
1996 | family != x->sel.family) { | |
1997 | xfrm_put_mode(inner_mode); | |
1998 | goto error; | |
1999 | } | |
2000 | ||
2001 | x->inner_mode = inner_mode; | |
2002 | } else { | |
2003 | struct xfrm_mode *inner_mode_iaf; | |
2004 | ||
2005 | inner_mode = xfrm_get_mode(x->props.mode, AF_INET); | |
2006 | if (inner_mode == NULL) | |
2007 | goto error; | |
2008 | ||
2009 | if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) { | |
2010 | xfrm_put_mode(inner_mode); | |
2011 | goto error; | |
2012 | } | |
2013 | ||
2014 | inner_mode_iaf = xfrm_get_mode(x->props.mode, AF_INET6); | |
2015 | if (inner_mode_iaf == NULL) | |
2016 | goto error; | |
2017 | ||
2018 | if (!(inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL)) { | |
2019 | xfrm_put_mode(inner_mode_iaf); | |
2020 | goto error; | |
2021 | } | |
2022 | ||
2023 | if (x->props.family == AF_INET) { | |
2024 | x->inner_mode = inner_mode; | |
2025 | x->inner_mode_iaf = inner_mode_iaf; | |
2026 | } else { | |
2027 | x->inner_mode = inner_mode_iaf; | |
2028 | x->inner_mode_iaf = inner_mode; | |
2029 | } | |
2030 | } | |
13996378 | 2031 | |
d094cd83 | 2032 | x->type = xfrm_get_type(x->id.proto, family); |
72cb6962 HX |
2033 | if (x->type == NULL) |
2034 | goto error; | |
2035 | ||
2036 | err = x->type->init_state(x); | |
2037 | if (err) | |
2038 | goto error; | |
2039 | ||
13996378 HX |
2040 | x->outer_mode = xfrm_get_mode(x->props.mode, family); |
2041 | if (x->outer_mode == NULL) | |
b59f45d0 HX |
2042 | goto error; |
2043 | ||
72cb6962 HX |
2044 | x->km.state = XFRM_STATE_VALID; |
2045 | ||
2046 | error: | |
2047 | return err; | |
2048 | } | |
2049 | ||
2050 | EXPORT_SYMBOL(xfrm_init_state); | |
a716c119 | 2051 | |
1da177e4 LT |
2052 | void __init xfrm_state_init(void) |
2053 | { | |
f034b5d4 DM |
2054 | unsigned int sz; |
2055 | ||
2056 | sz = sizeof(struct hlist_head) * 8; | |
2057 | ||
44e36b42 DM |
2058 | xfrm_state_bydst = xfrm_hash_alloc(sz); |
2059 | xfrm_state_bysrc = xfrm_hash_alloc(sz); | |
2060 | xfrm_state_byspi = xfrm_hash_alloc(sz); | |
f034b5d4 DM |
2061 | if (!xfrm_state_bydst || !xfrm_state_bysrc || !xfrm_state_byspi) |
2062 | panic("XFRM: Cannot allocate bydst/bysrc/byspi hashes."); | |
2063 | xfrm_state_hmask = ((sz / sizeof(struct hlist_head)) - 1); | |
1da177e4 | 2064 | |
c4028958 | 2065 | INIT_WORK(&xfrm_state_gc_work, xfrm_state_gc_task); |
1da177e4 LT |
2066 | } |
2067 | ||
ab5f5e8b | 2068 | #ifdef CONFIG_AUDITSYSCALL |
cf35f43e IJ |
2069 | static void xfrm_audit_helper_sainfo(struct xfrm_state *x, |
2070 | struct audit_buffer *audit_buf) | |
ab5f5e8b | 2071 | { |
68277acc PM |
2072 | struct xfrm_sec_ctx *ctx = x->security; |
2073 | u32 spi = ntohl(x->id.spi); | |
2074 | ||
2075 | if (ctx) | |
ab5f5e8b | 2076 | audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s", |
68277acc | 2077 | ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str); |
ab5f5e8b JL |
2078 | |
2079 | switch(x->props.family) { | |
2080 | case AF_INET: | |
68277acc PM |
2081 | audit_log_format(audit_buf, |
2082 | " src=" NIPQUAD_FMT " dst=" NIPQUAD_FMT, | |
ab5f5e8b JL |
2083 | NIPQUAD(x->props.saddr.a4), |
2084 | NIPQUAD(x->id.daddr.a4)); | |
2085 | break; | |
2086 | case AF_INET6: | |
68277acc PM |
2087 | audit_log_format(audit_buf, |
2088 | " src=" NIP6_FMT " dst=" NIP6_FMT, | |
2089 | NIP6(*(struct in6_addr *)x->props.saddr.a6), | |
2090 | NIP6(*(struct in6_addr *)x->id.daddr.a6)); | |
ab5f5e8b JL |
2091 | break; |
2092 | } | |
68277acc PM |
2093 | |
2094 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
ab5f5e8b JL |
2095 | } |
2096 | ||
cf35f43e IJ |
2097 | static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family, |
2098 | struct audit_buffer *audit_buf) | |
afeb14b4 PM |
2099 | { |
2100 | struct iphdr *iph4; | |
2101 | struct ipv6hdr *iph6; | |
2102 | ||
2103 | switch (family) { | |
2104 | case AF_INET: | |
2105 | iph4 = ip_hdr(skb); | |
2106 | audit_log_format(audit_buf, | |
2107 | " src=" NIPQUAD_FMT " dst=" NIPQUAD_FMT, | |
2108 | NIPQUAD(iph4->saddr), | |
2109 | NIPQUAD(iph4->daddr)); | |
2110 | break; | |
2111 | case AF_INET6: | |
2112 | iph6 = ipv6_hdr(skb); | |
2113 | audit_log_format(audit_buf, | |
2114 | " src=" NIP6_FMT " dst=" NIP6_FMT | |
2115 | " flowlbl=0x%x%x%x", | |
2116 | NIP6(iph6->saddr), | |
2117 | NIP6(iph6->daddr), | |
2118 | iph6->flow_lbl[0] & 0x0f, | |
2119 | iph6->flow_lbl[1], | |
2120 | iph6->flow_lbl[2]); | |
2121 | break; | |
2122 | } | |
2123 | } | |
2124 | ||
68277acc PM |
2125 | void xfrm_audit_state_add(struct xfrm_state *x, int result, |
2126 | u32 auid, u32 secid) | |
ab5f5e8b JL |
2127 | { |
2128 | struct audit_buffer *audit_buf; | |
ab5f5e8b | 2129 | |
afeb14b4 | 2130 | audit_buf = xfrm_audit_start("SAD-add"); |
ab5f5e8b JL |
2131 | if (audit_buf == NULL) |
2132 | return; | |
afeb14b4 PM |
2133 | xfrm_audit_helper_usrinfo(auid, secid, audit_buf); |
2134 | xfrm_audit_helper_sainfo(x, audit_buf); | |
2135 | audit_log_format(audit_buf, " res=%u", result); | |
ab5f5e8b JL |
2136 | audit_log_end(audit_buf); |
2137 | } | |
2138 | EXPORT_SYMBOL_GPL(xfrm_audit_state_add); | |
2139 | ||
68277acc PM |
2140 | void xfrm_audit_state_delete(struct xfrm_state *x, int result, |
2141 | u32 auid, u32 secid) | |
ab5f5e8b JL |
2142 | { |
2143 | struct audit_buffer *audit_buf; | |
ab5f5e8b | 2144 | |
afeb14b4 | 2145 | audit_buf = xfrm_audit_start("SAD-delete"); |
ab5f5e8b JL |
2146 | if (audit_buf == NULL) |
2147 | return; | |
afeb14b4 PM |
2148 | xfrm_audit_helper_usrinfo(auid, secid, audit_buf); |
2149 | xfrm_audit_helper_sainfo(x, audit_buf); | |
2150 | audit_log_format(audit_buf, " res=%u", result); | |
ab5f5e8b JL |
2151 | audit_log_end(audit_buf); |
2152 | } | |
2153 | EXPORT_SYMBOL_GPL(xfrm_audit_state_delete); | |
afeb14b4 PM |
2154 | |
2155 | void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
2156 | struct sk_buff *skb) | |
2157 | { | |
2158 | struct audit_buffer *audit_buf; | |
2159 | u32 spi; | |
2160 | ||
2161 | audit_buf = xfrm_audit_start("SA-replay-overflow"); | |
2162 | if (audit_buf == NULL) | |
2163 | return; | |
2164 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2165 | /* don't record the sequence number because it's inherent in this kind | |
2166 | * of audit message */ | |
2167 | spi = ntohl(x->id.spi); | |
2168 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
2169 | audit_log_end(audit_buf); | |
2170 | } | |
2171 | EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow); | |
2172 | ||
2173 | static void xfrm_audit_state_replay(struct xfrm_state *x, | |
2174 | struct sk_buff *skb, __be32 net_seq) | |
2175 | { | |
2176 | struct audit_buffer *audit_buf; | |
2177 | u32 spi; | |
2178 | ||
2179 | audit_buf = xfrm_audit_start("SA-replayed-pkt"); | |
2180 | if (audit_buf == NULL) | |
2181 | return; | |
2182 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2183 | spi = ntohl(x->id.spi); | |
2184 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2185 | spi, spi, ntohl(net_seq)); | |
2186 | audit_log_end(audit_buf); | |
2187 | } | |
2188 | ||
2189 | void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family) | |
2190 | { | |
2191 | struct audit_buffer *audit_buf; | |
2192 | ||
2193 | audit_buf = xfrm_audit_start("SA-notfound"); | |
2194 | if (audit_buf == NULL) | |
2195 | return; | |
2196 | xfrm_audit_helper_pktinfo(skb, family, audit_buf); | |
2197 | audit_log_end(audit_buf); | |
2198 | } | |
2199 | EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple); | |
2200 | ||
2201 | void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
2202 | __be32 net_spi, __be32 net_seq) | |
2203 | { | |
2204 | struct audit_buffer *audit_buf; | |
2205 | u32 spi; | |
2206 | ||
2207 | audit_buf = xfrm_audit_start("SA-notfound"); | |
2208 | if (audit_buf == NULL) | |
2209 | return; | |
2210 | xfrm_audit_helper_pktinfo(skb, family, audit_buf); | |
2211 | spi = ntohl(net_spi); | |
2212 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2213 | spi, spi, ntohl(net_seq)); | |
2214 | audit_log_end(audit_buf); | |
2215 | } | |
2216 | EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound); | |
2217 | ||
2218 | void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
2219 | struct sk_buff *skb, u8 proto) | |
2220 | { | |
2221 | struct audit_buffer *audit_buf; | |
2222 | __be32 net_spi; | |
2223 | __be32 net_seq; | |
2224 | ||
2225 | audit_buf = xfrm_audit_start("SA-icv-failure"); | |
2226 | if (audit_buf == NULL) | |
2227 | return; | |
2228 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2229 | if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) { | |
2230 | u32 spi = ntohl(net_spi); | |
2231 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2232 | spi, spi, ntohl(net_seq)); | |
2233 | } | |
2234 | audit_log_end(audit_buf); | |
2235 | } | |
2236 | EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail); | |
ab5f5e8b | 2237 | #endif /* CONFIG_AUDITSYSCALL */ |