]>
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> |
9e0d57fd | 24 | #include <linux/ktime.h> |
5a0e3ad6 | 25 | #include <linux/slab.h> |
9e0d57fd YP |
26 | #include <linux/interrupt.h> |
27 | #include <linux/kernel.h> | |
1da177e4 | 28 | |
44e36b42 DM |
29 | #include "xfrm_hash.h" |
30 | ||
1da177e4 LT |
31 | /* Each xfrm_state may be linked to two tables: |
32 | ||
33 | 1. Hash table by (spi,daddr,ah/esp) to find SA by SPI. (input,ctl) | |
a624c108 | 34 | 2. Hash table by (daddr,family,reqid) to find what SAs exist for given |
1da177e4 LT |
35 | destination/tunnel endpoint. (output) |
36 | */ | |
37 | ||
38 | static DEFINE_SPINLOCK(xfrm_state_lock); | |
39 | ||
f034b5d4 | 40 | static unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024; |
f034b5d4 | 41 | |
17c2a42a HX |
42 | static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family); |
43 | static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo); | |
44 | ||
64d0cd00 | 45 | static inline unsigned int xfrm_dst_hash(struct net *net, |
2ab38503 DM |
46 | const xfrm_address_t *daddr, |
47 | const xfrm_address_t *saddr, | |
c1969f29 | 48 | u32 reqid, |
a624c108 | 49 | unsigned short family) |
f034b5d4 | 50 | { |
64d0cd00 | 51 | return __xfrm_dst_hash(daddr, saddr, reqid, family, net->xfrm.state_hmask); |
f034b5d4 DM |
52 | } |
53 | ||
64d0cd00 | 54 | static inline unsigned int xfrm_src_hash(struct net *net, |
2ab38503 DM |
55 | const xfrm_address_t *daddr, |
56 | const xfrm_address_t *saddr, | |
44e36b42 | 57 | unsigned short family) |
f034b5d4 | 58 | { |
64d0cd00 | 59 | return __xfrm_src_hash(daddr, saddr, family, net->xfrm.state_hmask); |
f034b5d4 DM |
60 | } |
61 | ||
f034b5d4 | 62 | static inline unsigned int |
2ab38503 DM |
63 | xfrm_spi_hash(struct net *net, const xfrm_address_t *daddr, |
64 | __be32 spi, u8 proto, unsigned short family) | |
f034b5d4 | 65 | { |
64d0cd00 | 66 | return __xfrm_spi_hash(daddr, spi, proto, family, net->xfrm.state_hmask); |
f034b5d4 DM |
67 | } |
68 | ||
f034b5d4 DM |
69 | static void xfrm_hash_transfer(struct hlist_head *list, |
70 | struct hlist_head *ndsttable, | |
71 | struct hlist_head *nsrctable, | |
72 | struct hlist_head *nspitable, | |
73 | unsigned int nhashmask) | |
74 | { | |
75 | struct hlist_node *entry, *tmp; | |
76 | struct xfrm_state *x; | |
77 | ||
78 | hlist_for_each_entry_safe(x, entry, tmp, list, bydst) { | |
79 | unsigned int h; | |
80 | ||
c1969f29 DM |
81 | h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr, |
82 | x->props.reqid, x->props.family, | |
83 | nhashmask); | |
f034b5d4 DM |
84 | hlist_add_head(&x->bydst, ndsttable+h); |
85 | ||
667bbcb6 MN |
86 | h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr, |
87 | x->props.family, | |
f034b5d4 DM |
88 | nhashmask); |
89 | hlist_add_head(&x->bysrc, nsrctable+h); | |
90 | ||
7b4dc360 MN |
91 | if (x->id.spi) { |
92 | h = __xfrm_spi_hash(&x->id.daddr, x->id.spi, | |
93 | x->id.proto, x->props.family, | |
94 | nhashmask); | |
95 | hlist_add_head(&x->byspi, nspitable+h); | |
96 | } | |
f034b5d4 DM |
97 | } |
98 | } | |
99 | ||
63082733 | 100 | static unsigned long xfrm_hash_new_size(unsigned int state_hmask) |
f034b5d4 | 101 | { |
63082733 | 102 | return ((state_hmask + 1) << 1) * sizeof(struct hlist_head); |
f034b5d4 DM |
103 | } |
104 | ||
105 | static DEFINE_MUTEX(hash_resize_mutex); | |
106 | ||
63082733 | 107 | static void xfrm_hash_resize(struct work_struct *work) |
f034b5d4 | 108 | { |
63082733 | 109 | struct net *net = container_of(work, struct net, xfrm.state_hash_work); |
f034b5d4 DM |
110 | struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi; |
111 | unsigned long nsize, osize; | |
112 | unsigned int nhashmask, ohashmask; | |
113 | int i; | |
114 | ||
115 | mutex_lock(&hash_resize_mutex); | |
116 | ||
63082733 | 117 | nsize = xfrm_hash_new_size(net->xfrm.state_hmask); |
44e36b42 | 118 | ndst = xfrm_hash_alloc(nsize); |
f034b5d4 DM |
119 | if (!ndst) |
120 | goto out_unlock; | |
44e36b42 | 121 | nsrc = xfrm_hash_alloc(nsize); |
f034b5d4 | 122 | if (!nsrc) { |
44e36b42 | 123 | xfrm_hash_free(ndst, nsize); |
f034b5d4 DM |
124 | goto out_unlock; |
125 | } | |
44e36b42 | 126 | nspi = xfrm_hash_alloc(nsize); |
f034b5d4 | 127 | if (!nspi) { |
44e36b42 DM |
128 | xfrm_hash_free(ndst, nsize); |
129 | xfrm_hash_free(nsrc, nsize); | |
f034b5d4 DM |
130 | goto out_unlock; |
131 | } | |
132 | ||
133 | spin_lock_bh(&xfrm_state_lock); | |
134 | ||
135 | nhashmask = (nsize / sizeof(struct hlist_head)) - 1U; | |
63082733 AD |
136 | for (i = net->xfrm.state_hmask; i >= 0; i--) |
137 | xfrm_hash_transfer(net->xfrm.state_bydst+i, ndst, nsrc, nspi, | |
f034b5d4 DM |
138 | nhashmask); |
139 | ||
63082733 AD |
140 | odst = net->xfrm.state_bydst; |
141 | osrc = net->xfrm.state_bysrc; | |
142 | ospi = net->xfrm.state_byspi; | |
143 | ohashmask = net->xfrm.state_hmask; | |
f034b5d4 | 144 | |
63082733 AD |
145 | net->xfrm.state_bydst = ndst; |
146 | net->xfrm.state_bysrc = nsrc; | |
147 | net->xfrm.state_byspi = nspi; | |
148 | net->xfrm.state_hmask = nhashmask; | |
f034b5d4 DM |
149 | |
150 | spin_unlock_bh(&xfrm_state_lock); | |
151 | ||
152 | osize = (ohashmask + 1) * sizeof(struct hlist_head); | |
44e36b42 DM |
153 | xfrm_hash_free(odst, osize); |
154 | xfrm_hash_free(osrc, osize); | |
155 | xfrm_hash_free(ospi, osize); | |
f034b5d4 DM |
156 | |
157 | out_unlock: | |
158 | mutex_unlock(&hash_resize_mutex); | |
159 | } | |
160 | ||
1da177e4 LT |
161 | static DEFINE_RWLOCK(xfrm_state_afinfo_lock); |
162 | static struct xfrm_state_afinfo *xfrm_state_afinfo[NPROTO]; | |
163 | ||
1da177e4 LT |
164 | static DEFINE_SPINLOCK(xfrm_state_gc_lock); |
165 | ||
53bc6b4d | 166 | int __xfrm_state_delete(struct xfrm_state *x); |
1da177e4 | 167 | |
980ebd25 | 168 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); |
53bc6b4d | 169 | void km_state_expired(struct xfrm_state *x, int hard, u32 pid); |
1da177e4 | 170 | |
aa5d62cc HX |
171 | static struct xfrm_state_afinfo *xfrm_state_lock_afinfo(unsigned int family) |
172 | { | |
173 | struct xfrm_state_afinfo *afinfo; | |
174 | if (unlikely(family >= NPROTO)) | |
175 | return NULL; | |
176 | write_lock_bh(&xfrm_state_afinfo_lock); | |
177 | afinfo = xfrm_state_afinfo[family]; | |
178 | if (unlikely(!afinfo)) | |
179 | write_unlock_bh(&xfrm_state_afinfo_lock); | |
180 | return afinfo; | |
181 | } | |
182 | ||
183 | static void xfrm_state_unlock_afinfo(struct xfrm_state_afinfo *afinfo) | |
9a429c49 | 184 | __releases(xfrm_state_afinfo_lock) |
aa5d62cc HX |
185 | { |
186 | write_unlock_bh(&xfrm_state_afinfo_lock); | |
187 | } | |
188 | ||
533cb5b0 | 189 | int xfrm_register_type(const struct xfrm_type *type, unsigned short family) |
aa5d62cc HX |
190 | { |
191 | struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family); | |
533cb5b0 | 192 | const struct xfrm_type **typemap; |
aa5d62cc HX |
193 | int err = 0; |
194 | ||
195 | if (unlikely(afinfo == NULL)) | |
196 | return -EAFNOSUPPORT; | |
197 | typemap = afinfo->type_map; | |
198 | ||
199 | if (likely(typemap[type->proto] == NULL)) | |
200 | typemap[type->proto] = type; | |
201 | else | |
202 | err = -EEXIST; | |
203 | xfrm_state_unlock_afinfo(afinfo); | |
204 | return err; | |
205 | } | |
206 | EXPORT_SYMBOL(xfrm_register_type); | |
207 | ||
533cb5b0 | 208 | int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family) |
aa5d62cc HX |
209 | { |
210 | struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family); | |
533cb5b0 | 211 | const struct xfrm_type **typemap; |
aa5d62cc HX |
212 | int err = 0; |
213 | ||
214 | if (unlikely(afinfo == NULL)) | |
215 | return -EAFNOSUPPORT; | |
216 | typemap = afinfo->type_map; | |
217 | ||
218 | if (unlikely(typemap[type->proto] != type)) | |
219 | err = -ENOENT; | |
220 | else | |
221 | typemap[type->proto] = NULL; | |
222 | xfrm_state_unlock_afinfo(afinfo); | |
223 | return err; | |
224 | } | |
225 | EXPORT_SYMBOL(xfrm_unregister_type); | |
226 | ||
533cb5b0 | 227 | static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family) |
aa5d62cc HX |
228 | { |
229 | struct xfrm_state_afinfo *afinfo; | |
533cb5b0 ED |
230 | const struct xfrm_type **typemap; |
231 | const struct xfrm_type *type; | |
aa5d62cc HX |
232 | int modload_attempted = 0; |
233 | ||
234 | retry: | |
235 | afinfo = xfrm_state_get_afinfo(family); | |
236 | if (unlikely(afinfo == NULL)) | |
237 | return NULL; | |
238 | typemap = afinfo->type_map; | |
239 | ||
240 | type = typemap[proto]; | |
241 | if (unlikely(type && !try_module_get(type->owner))) | |
242 | type = NULL; | |
243 | if (!type && !modload_attempted) { | |
244 | xfrm_state_put_afinfo(afinfo); | |
245 | request_module("xfrm-type-%d-%d", family, proto); | |
246 | modload_attempted = 1; | |
247 | goto retry; | |
248 | } | |
249 | ||
250 | xfrm_state_put_afinfo(afinfo); | |
251 | return type; | |
252 | } | |
253 | ||
533cb5b0 | 254 | static void xfrm_put_type(const struct xfrm_type *type) |
aa5d62cc HX |
255 | { |
256 | module_put(type->owner); | |
257 | } | |
258 | ||
259 | int xfrm_register_mode(struct xfrm_mode *mode, int family) | |
260 | { | |
261 | struct xfrm_state_afinfo *afinfo; | |
262 | struct xfrm_mode **modemap; | |
263 | int err; | |
264 | ||
265 | if (unlikely(mode->encap >= XFRM_MODE_MAX)) | |
266 | return -EINVAL; | |
267 | ||
268 | afinfo = xfrm_state_lock_afinfo(family); | |
269 | if (unlikely(afinfo == NULL)) | |
270 | return -EAFNOSUPPORT; | |
271 | ||
272 | err = -EEXIST; | |
273 | modemap = afinfo->mode_map; | |
17c2a42a HX |
274 | if (modemap[mode->encap]) |
275 | goto out; | |
aa5d62cc | 276 | |
17c2a42a HX |
277 | err = -ENOENT; |
278 | if (!try_module_get(afinfo->owner)) | |
279 | goto out; | |
280 | ||
281 | mode->afinfo = afinfo; | |
282 | modemap[mode->encap] = mode; | |
283 | err = 0; | |
284 | ||
285 | out: | |
aa5d62cc HX |
286 | xfrm_state_unlock_afinfo(afinfo); |
287 | return err; | |
288 | } | |
289 | EXPORT_SYMBOL(xfrm_register_mode); | |
290 | ||
291 | int xfrm_unregister_mode(struct xfrm_mode *mode, int family) | |
292 | { | |
293 | struct xfrm_state_afinfo *afinfo; | |
294 | struct xfrm_mode **modemap; | |
295 | int err; | |
296 | ||
297 | if (unlikely(mode->encap >= XFRM_MODE_MAX)) | |
298 | return -EINVAL; | |
299 | ||
300 | afinfo = xfrm_state_lock_afinfo(family); | |
301 | if (unlikely(afinfo == NULL)) | |
302 | return -EAFNOSUPPORT; | |
303 | ||
304 | err = -ENOENT; | |
305 | modemap = afinfo->mode_map; | |
306 | if (likely(modemap[mode->encap] == mode)) { | |
307 | modemap[mode->encap] = NULL; | |
17c2a42a | 308 | module_put(mode->afinfo->owner); |
aa5d62cc HX |
309 | err = 0; |
310 | } | |
311 | ||
312 | xfrm_state_unlock_afinfo(afinfo); | |
313 | return err; | |
314 | } | |
315 | EXPORT_SYMBOL(xfrm_unregister_mode); | |
316 | ||
317 | static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family) | |
318 | { | |
319 | struct xfrm_state_afinfo *afinfo; | |
320 | struct xfrm_mode *mode; | |
321 | int modload_attempted = 0; | |
322 | ||
323 | if (unlikely(encap >= XFRM_MODE_MAX)) | |
324 | return NULL; | |
325 | ||
326 | retry: | |
327 | afinfo = xfrm_state_get_afinfo(family); | |
328 | if (unlikely(afinfo == NULL)) | |
329 | return NULL; | |
330 | ||
331 | mode = afinfo->mode_map[encap]; | |
332 | if (unlikely(mode && !try_module_get(mode->owner))) | |
333 | mode = NULL; | |
334 | if (!mode && !modload_attempted) { | |
335 | xfrm_state_put_afinfo(afinfo); | |
336 | request_module("xfrm-mode-%d-%d", family, encap); | |
337 | modload_attempted = 1; | |
338 | goto retry; | |
339 | } | |
340 | ||
341 | xfrm_state_put_afinfo(afinfo); | |
342 | return mode; | |
343 | } | |
344 | ||
345 | static void xfrm_put_mode(struct xfrm_mode *mode) | |
346 | { | |
347 | module_put(mode->owner); | |
348 | } | |
349 | ||
1da177e4 LT |
350 | static void xfrm_state_gc_destroy(struct xfrm_state *x) |
351 | { | |
9e0d57fd | 352 | tasklet_hrtimer_cancel(&x->mtimer); |
a47f0ce0 | 353 | del_timer_sync(&x->rtimer); |
a51482bd JJ |
354 | kfree(x->aalg); |
355 | kfree(x->ealg); | |
356 | kfree(x->calg); | |
357 | kfree(x->encap); | |
060f02a3 | 358 | kfree(x->coaddr); |
d8647b79 SK |
359 | kfree(x->replay_esn); |
360 | kfree(x->preplay_esn); | |
13996378 HX |
361 | if (x->inner_mode) |
362 | xfrm_put_mode(x->inner_mode); | |
df9dcb45 KM |
363 | if (x->inner_mode_iaf) |
364 | xfrm_put_mode(x->inner_mode_iaf); | |
13996378 HX |
365 | if (x->outer_mode) |
366 | xfrm_put_mode(x->outer_mode); | |
1da177e4 LT |
367 | if (x->type) { |
368 | x->type->destructor(x); | |
369 | xfrm_put_type(x->type); | |
370 | } | |
df71837d | 371 | security_xfrm_state_free(x); |
1da177e4 LT |
372 | kfree(x); |
373 | } | |
374 | ||
c7837144 | 375 | static void xfrm_state_gc_task(struct work_struct *work) |
1da177e4 | 376 | { |
c7837144 | 377 | struct net *net = container_of(work, struct net, xfrm.state_gc_work); |
12a169e7 HX |
378 | struct xfrm_state *x; |
379 | struct hlist_node *entry, *tmp; | |
380 | struct hlist_head gc_list; | |
1da177e4 | 381 | |
1da177e4 | 382 | spin_lock_bh(&xfrm_state_gc_lock); |
c7837144 | 383 | hlist_move_list(&net->xfrm.state_gc_list, &gc_list); |
1da177e4 LT |
384 | spin_unlock_bh(&xfrm_state_gc_lock); |
385 | ||
12a169e7 | 386 | hlist_for_each_entry_safe(x, entry, tmp, &gc_list, gclist) |
1da177e4 | 387 | xfrm_state_gc_destroy(x); |
8f126e37 | 388 | |
50a30657 | 389 | wake_up(&net->xfrm.km_waitq); |
1da177e4 LT |
390 | } |
391 | ||
392 | static inline unsigned long make_jiffies(long secs) | |
393 | { | |
394 | if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ) | |
395 | return MAX_SCHEDULE_TIMEOUT-1; | |
396 | else | |
a716c119 | 397 | return secs*HZ; |
1da177e4 LT |
398 | } |
399 | ||
9e0d57fd | 400 | static enum hrtimer_restart xfrm_timer_handler(struct hrtimer * me) |
1da177e4 | 401 | { |
9e0d57fd YP |
402 | struct tasklet_hrtimer *thr = container_of(me, struct tasklet_hrtimer, timer); |
403 | struct xfrm_state *x = container_of(thr, struct xfrm_state, mtimer); | |
98806f75 | 404 | struct net *net = xs_net(x); |
9d729f72 | 405 | unsigned long now = get_seconds(); |
1da177e4 LT |
406 | long next = LONG_MAX; |
407 | int warn = 0; | |
161a09e7 | 408 | int err = 0; |
1da177e4 LT |
409 | |
410 | spin_lock(&x->lock); | |
411 | if (x->km.state == XFRM_STATE_DEAD) | |
412 | goto out; | |
413 | if (x->km.state == XFRM_STATE_EXPIRED) | |
414 | goto expired; | |
415 | if (x->lft.hard_add_expires_seconds) { | |
416 | long tmo = x->lft.hard_add_expires_seconds + | |
417 | x->curlft.add_time - now; | |
418 | if (tmo <= 0) | |
419 | goto expired; | |
420 | if (tmo < next) | |
421 | next = tmo; | |
422 | } | |
423 | if (x->lft.hard_use_expires_seconds) { | |
424 | long tmo = x->lft.hard_use_expires_seconds + | |
425 | (x->curlft.use_time ? : now) - now; | |
426 | if (tmo <= 0) | |
427 | goto expired; | |
428 | if (tmo < next) | |
429 | next = tmo; | |
430 | } | |
431 | if (x->km.dying) | |
432 | goto resched; | |
433 | if (x->lft.soft_add_expires_seconds) { | |
434 | long tmo = x->lft.soft_add_expires_seconds + | |
435 | x->curlft.add_time - now; | |
436 | if (tmo <= 0) | |
437 | warn = 1; | |
438 | else if (tmo < next) | |
439 | next = tmo; | |
440 | } | |
441 | if (x->lft.soft_use_expires_seconds) { | |
442 | long tmo = x->lft.soft_use_expires_seconds + | |
443 | (x->curlft.use_time ? : now) - now; | |
444 | if (tmo <= 0) | |
445 | warn = 1; | |
446 | else if (tmo < next) | |
447 | next = tmo; | |
448 | } | |
449 | ||
4666faab | 450 | x->km.dying = warn; |
1da177e4 | 451 | if (warn) |
53bc6b4d | 452 | km_state_expired(x, 0, 0); |
1da177e4 | 453 | resched: |
9e0d57fd YP |
454 | if (next != LONG_MAX){ |
455 | tasklet_hrtimer_start(&x->mtimer, ktime_set(next, 0), HRTIMER_MODE_REL); | |
456 | } | |
a47f0ce0 | 457 | |
1da177e4 LT |
458 | goto out; |
459 | ||
460 | expired: | |
461 | if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) { | |
462 | x->km.state = XFRM_STATE_EXPIRED; | |
98806f75 | 463 | wake_up(&net->xfrm.km_waitq); |
1da177e4 LT |
464 | next = 2; |
465 | goto resched; | |
466 | } | |
161a09e7 JL |
467 | |
468 | err = __xfrm_state_delete(x); | |
469 | if (!err && x->id.spi) | |
53bc6b4d | 470 | km_state_expired(x, 1, 0); |
1da177e4 | 471 | |
ab5f5e8b | 472 | xfrm_audit_state_delete(x, err ? 0 : 1, |
2532386f EP |
473 | audit_get_loginuid(current), |
474 | audit_get_sessionid(current), 0); | |
161a09e7 | 475 | |
1da177e4 LT |
476 | out: |
477 | spin_unlock(&x->lock); | |
9e0d57fd | 478 | return HRTIMER_NORESTART; |
1da177e4 LT |
479 | } |
480 | ||
0ac84752 DM |
481 | static void xfrm_replay_timer_handler(unsigned long data); |
482 | ||
673c09be | 483 | struct xfrm_state *xfrm_state_alloc(struct net *net) |
1da177e4 LT |
484 | { |
485 | struct xfrm_state *x; | |
486 | ||
0da974f4 | 487 | x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC); |
1da177e4 LT |
488 | |
489 | if (x) { | |
673c09be | 490 | write_pnet(&x->xs_net, net); |
1da177e4 LT |
491 | atomic_set(&x->refcnt, 1); |
492 | atomic_set(&x->tunnel_users, 0); | |
12a169e7 | 493 | INIT_LIST_HEAD(&x->km.all); |
8f126e37 DM |
494 | INIT_HLIST_NODE(&x->bydst); |
495 | INIT_HLIST_NODE(&x->bysrc); | |
496 | INIT_HLIST_NODE(&x->byspi); | |
9e0d57fd | 497 | tasklet_hrtimer_init(&x->mtimer, xfrm_timer_handler, CLOCK_REALTIME, HRTIMER_MODE_ABS); |
b24b8a24 PE |
498 | setup_timer(&x->rtimer, xfrm_replay_timer_handler, |
499 | (unsigned long)x); | |
9d729f72 | 500 | x->curlft.add_time = get_seconds(); |
1da177e4 LT |
501 | x->lft.soft_byte_limit = XFRM_INF; |
502 | x->lft.soft_packet_limit = XFRM_INF; | |
503 | x->lft.hard_byte_limit = XFRM_INF; | |
504 | x->lft.hard_packet_limit = XFRM_INF; | |
f8cd5488 JHS |
505 | x->replay_maxage = 0; |
506 | x->replay_maxdiff = 0; | |
df9dcb45 KM |
507 | x->inner_mode = NULL; |
508 | x->inner_mode_iaf = NULL; | |
1da177e4 LT |
509 | spin_lock_init(&x->lock); |
510 | } | |
511 | return x; | |
512 | } | |
513 | EXPORT_SYMBOL(xfrm_state_alloc); | |
514 | ||
515 | void __xfrm_state_destroy(struct xfrm_state *x) | |
516 | { | |
98806f75 AD |
517 | struct net *net = xs_net(x); |
518 | ||
547b792c | 519 | WARN_ON(x->km.state != XFRM_STATE_DEAD); |
1da177e4 LT |
520 | |
521 | spin_lock_bh(&xfrm_state_gc_lock); | |
98806f75 | 522 | hlist_add_head(&x->gclist, &net->xfrm.state_gc_list); |
1da177e4 | 523 | spin_unlock_bh(&xfrm_state_gc_lock); |
98806f75 | 524 | schedule_work(&net->xfrm.state_gc_work); |
1da177e4 LT |
525 | } |
526 | EXPORT_SYMBOL(__xfrm_state_destroy); | |
527 | ||
53bc6b4d | 528 | int __xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 529 | { |
98806f75 | 530 | struct net *net = xs_net(x); |
26b15dad JHS |
531 | int err = -ESRCH; |
532 | ||
1da177e4 LT |
533 | if (x->km.state != XFRM_STATE_DEAD) { |
534 | x->km.state = XFRM_STATE_DEAD; | |
535 | spin_lock(&xfrm_state_lock); | |
12a169e7 | 536 | list_del(&x->km.all); |
8f126e37 | 537 | hlist_del(&x->bydst); |
8f126e37 | 538 | hlist_del(&x->bysrc); |
a47f0ce0 | 539 | if (x->id.spi) |
8f126e37 | 540 | hlist_del(&x->byspi); |
98806f75 | 541 | net->xfrm.state_num--; |
1da177e4 | 542 | spin_unlock(&xfrm_state_lock); |
1da177e4 | 543 | |
1da177e4 LT |
544 | /* All xfrm_state objects are created by xfrm_state_alloc. |
545 | * The xfrm_state_alloc call gives a reference, and that | |
546 | * is what we are dropping here. | |
547 | */ | |
5dba4797 | 548 | xfrm_state_put(x); |
26b15dad | 549 | err = 0; |
1da177e4 | 550 | } |
26b15dad JHS |
551 | |
552 | return err; | |
1da177e4 | 553 | } |
53bc6b4d | 554 | EXPORT_SYMBOL(__xfrm_state_delete); |
1da177e4 | 555 | |
26b15dad | 556 | int xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 557 | { |
26b15dad JHS |
558 | int err; |
559 | ||
1da177e4 | 560 | spin_lock_bh(&x->lock); |
26b15dad | 561 | err = __xfrm_state_delete(x); |
1da177e4 | 562 | spin_unlock_bh(&x->lock); |
26b15dad JHS |
563 | |
564 | return err; | |
1da177e4 LT |
565 | } |
566 | EXPORT_SYMBOL(xfrm_state_delete); | |
567 | ||
4aa2e62c JL |
568 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
569 | static inline int | |
0e602451 | 570 | xfrm_state_flush_secctx_check(struct net *net, u8 proto, struct xfrm_audit *audit_info) |
1da177e4 | 571 | { |
4aa2e62c JL |
572 | int i, err = 0; |
573 | ||
0e602451 | 574 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
4aa2e62c JL |
575 | struct hlist_node *entry; |
576 | struct xfrm_state *x; | |
577 | ||
0e602451 | 578 | hlist_for_each_entry(x, entry, net->xfrm.state_bydst+i, bydst) { |
4aa2e62c JL |
579 | if (xfrm_id_proto_match(x->id.proto, proto) && |
580 | (err = security_xfrm_state_delete(x)) != 0) { | |
ab5f5e8b JL |
581 | xfrm_audit_state_delete(x, 0, |
582 | audit_info->loginuid, | |
2532386f | 583 | audit_info->sessionid, |
ab5f5e8b | 584 | audit_info->secid); |
4aa2e62c JL |
585 | return err; |
586 | } | |
587 | } | |
588 | } | |
589 | ||
590 | return err; | |
591 | } | |
592 | #else | |
593 | static inline int | |
0e602451 | 594 | xfrm_state_flush_secctx_check(struct net *net, u8 proto, struct xfrm_audit *audit_info) |
4aa2e62c JL |
595 | { |
596 | return 0; | |
597 | } | |
598 | #endif | |
599 | ||
0e602451 | 600 | int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info) |
4aa2e62c | 601 | { |
9e64cc95 | 602 | int i, err = 0, cnt = 0; |
1da177e4 LT |
603 | |
604 | spin_lock_bh(&xfrm_state_lock); | |
0e602451 | 605 | err = xfrm_state_flush_secctx_check(net, proto, audit_info); |
4aa2e62c JL |
606 | if (err) |
607 | goto out; | |
608 | ||
9e64cc95 | 609 | err = -ESRCH; |
0e602451 | 610 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
8f126e37 DM |
611 | struct hlist_node *entry; |
612 | struct xfrm_state *x; | |
1da177e4 | 613 | restart: |
0e602451 | 614 | hlist_for_each_entry(x, entry, net->xfrm.state_bydst+i, bydst) { |
1da177e4 | 615 | if (!xfrm_state_kern(x) && |
5794708f | 616 | xfrm_id_proto_match(x->id.proto, proto)) { |
1da177e4 LT |
617 | xfrm_state_hold(x); |
618 | spin_unlock_bh(&xfrm_state_lock); | |
619 | ||
161a09e7 | 620 | err = xfrm_state_delete(x); |
ab5f5e8b JL |
621 | xfrm_audit_state_delete(x, err ? 0 : 1, |
622 | audit_info->loginuid, | |
2532386f | 623 | audit_info->sessionid, |
ab5f5e8b | 624 | audit_info->secid); |
1da177e4 | 625 | xfrm_state_put(x); |
9e64cc95 JHS |
626 | if (!err) |
627 | cnt++; | |
1da177e4 LT |
628 | |
629 | spin_lock_bh(&xfrm_state_lock); | |
630 | goto restart; | |
631 | } | |
632 | } | |
633 | } | |
9e64cc95 JHS |
634 | if (cnt) |
635 | err = 0; | |
4aa2e62c JL |
636 | |
637 | out: | |
1da177e4 | 638 | spin_unlock_bh(&xfrm_state_lock); |
0e602451 | 639 | wake_up(&net->xfrm.km_waitq); |
4aa2e62c | 640 | return err; |
1da177e4 LT |
641 | } |
642 | EXPORT_SYMBOL(xfrm_state_flush); | |
643 | ||
e071041b | 644 | void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si) |
28d8909b JHS |
645 | { |
646 | spin_lock_bh(&xfrm_state_lock); | |
e071041b AD |
647 | si->sadcnt = net->xfrm.state_num; |
648 | si->sadhcnt = net->xfrm.state_hmask; | |
28d8909b JHS |
649 | si->sadhmcnt = xfrm_state_hashmax; |
650 | spin_unlock_bh(&xfrm_state_lock); | |
651 | } | |
652 | EXPORT_SYMBOL(xfrm_sad_getinfo); | |
653 | ||
1da177e4 | 654 | static int |
1a898592 | 655 | xfrm_init_tempstate(struct xfrm_state *x, const struct flowi *fl, |
04686013 | 656 | const struct xfrm_tmpl *tmpl, |
33765d06 | 657 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
8444cf71 | 658 | unsigned short family) |
1da177e4 LT |
659 | { |
660 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
661 | if (!afinfo) | |
662 | return -1; | |
8444cf71 TE |
663 | afinfo->init_tempsel(&x->sel, fl); |
664 | ||
665 | if (family != tmpl->encap_family) { | |
666 | xfrm_state_put_afinfo(afinfo); | |
667 | afinfo = xfrm_state_get_afinfo(tmpl->encap_family); | |
668 | if (!afinfo) | |
669 | return -1; | |
670 | } | |
671 | afinfo->init_temprop(x, tmpl, daddr, saddr); | |
1da177e4 LT |
672 | xfrm_state_put_afinfo(afinfo); |
673 | return 0; | |
674 | } | |
675 | ||
9aa60088 DM |
676 | static struct xfrm_state *__xfrm_state_lookup(struct net *net, u32 mark, |
677 | const xfrm_address_t *daddr, | |
678 | __be32 spi, u8 proto, | |
679 | unsigned short family) | |
edcd5821 | 680 | { |
221df1ed | 681 | unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family); |
edcd5821 | 682 | struct xfrm_state *x; |
8f126e37 | 683 | struct hlist_node *entry; |
edcd5821 | 684 | |
221df1ed | 685 | hlist_for_each_entry(x, entry, net->xfrm.state_byspi+h, byspi) { |
edcd5821 DM |
686 | if (x->props.family != family || |
687 | x->id.spi != spi || | |
1802571b WY |
688 | x->id.proto != proto || |
689 | xfrm_addr_cmp(&x->id.daddr, daddr, family)) | |
edcd5821 DM |
690 | continue; |
691 | ||
3d6acfa7 JHS |
692 | if ((mark & x->mark.m) != x->mark.v) |
693 | continue; | |
edcd5821 DM |
694 | xfrm_state_hold(x); |
695 | return x; | |
696 | } | |
697 | ||
698 | return NULL; | |
699 | } | |
700 | ||
9aa60088 DM |
701 | static struct xfrm_state *__xfrm_state_lookup_byaddr(struct net *net, u32 mark, |
702 | const xfrm_address_t *daddr, | |
703 | const xfrm_address_t *saddr, | |
704 | u8 proto, unsigned short family) | |
edcd5821 | 705 | { |
221df1ed | 706 | unsigned int h = xfrm_src_hash(net, daddr, saddr, family); |
edcd5821 | 707 | struct xfrm_state *x; |
8f126e37 | 708 | struct hlist_node *entry; |
edcd5821 | 709 | |
221df1ed | 710 | hlist_for_each_entry(x, entry, net->xfrm.state_bysrc+h, bysrc) { |
edcd5821 | 711 | if (x->props.family != family || |
1802571b WY |
712 | x->id.proto != proto || |
713 | xfrm_addr_cmp(&x->id.daddr, daddr, family) || | |
714 | xfrm_addr_cmp(&x->props.saddr, saddr, family)) | |
edcd5821 DM |
715 | continue; |
716 | ||
3d6acfa7 JHS |
717 | if ((mark & x->mark.m) != x->mark.v) |
718 | continue; | |
edcd5821 DM |
719 | xfrm_state_hold(x); |
720 | return x; | |
721 | } | |
722 | ||
723 | return NULL; | |
724 | } | |
725 | ||
726 | static inline struct xfrm_state * | |
727 | __xfrm_state_locate(struct xfrm_state *x, int use_spi, int family) | |
728 | { | |
221df1ed | 729 | struct net *net = xs_net(x); |
bd55775c | 730 | u32 mark = x->mark.v & x->mark.m; |
221df1ed | 731 | |
edcd5821 | 732 | if (use_spi) |
bd55775c JHS |
733 | return __xfrm_state_lookup(net, mark, &x->id.daddr, |
734 | x->id.spi, x->id.proto, family); | |
edcd5821 | 735 | else |
bd55775c JHS |
736 | return __xfrm_state_lookup_byaddr(net, mark, |
737 | &x->id.daddr, | |
edcd5821 DM |
738 | &x->props.saddr, |
739 | x->id.proto, family); | |
740 | } | |
741 | ||
98806f75 | 742 | static void xfrm_hash_grow_check(struct net *net, int have_hash_collision) |
2fab22f2 PM |
743 | { |
744 | if (have_hash_collision && | |
98806f75 AD |
745 | (net->xfrm.state_hmask + 1) < xfrm_state_hashmax && |
746 | net->xfrm.state_num > net->xfrm.state_hmask) | |
747 | schedule_work(&net->xfrm.state_hash_work); | |
2fab22f2 PM |
748 | } |
749 | ||
08ec9af1 | 750 | static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x, |
4a08ab0f | 751 | const struct flowi *fl, unsigned short family, |
08ec9af1 DM |
752 | struct xfrm_state **best, int *acq_in_progress, |
753 | int *error) | |
754 | { | |
755 | /* Resolution logic: | |
756 | * 1. There is a valid state with matching selector. Done. | |
757 | * 2. Valid state with inappropriate selector. Skip. | |
758 | * | |
759 | * Entering area of "sysdeps". | |
760 | * | |
761 | * 3. If state is not valid, selector is temporary, it selects | |
762 | * only session which triggered previous resolution. Key | |
763 | * manager will do something to install a state with proper | |
764 | * selector. | |
765 | */ | |
766 | if (x->km.state == XFRM_STATE_VALID) { | |
767 | if ((x->sel.family && | |
768 | !xfrm_selector_match(&x->sel, fl, x->sel.family)) || | |
769 | !security_xfrm_state_pol_flow_match(x, pol, fl)) | |
770 | return; | |
771 | ||
772 | if (!*best || | |
773 | (*best)->km.dying > x->km.dying || | |
774 | ((*best)->km.dying == x->km.dying && | |
775 | (*best)->curlft.add_time < x->curlft.add_time)) | |
776 | *best = x; | |
777 | } else if (x->km.state == XFRM_STATE_ACQ) { | |
778 | *acq_in_progress = 1; | |
779 | } else if (x->km.state == XFRM_STATE_ERROR || | |
780 | x->km.state == XFRM_STATE_EXPIRED) { | |
781 | if (xfrm_selector_match(&x->sel, fl, x->sel.family) && | |
782 | security_xfrm_state_pol_flow_match(x, pol, fl)) | |
783 | *error = -ESRCH; | |
784 | } | |
785 | } | |
786 | ||
1da177e4 | 787 | struct xfrm_state * |
33765d06 | 788 | xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
b520e9f6 | 789 | const struct flowi *fl, struct xfrm_tmpl *tmpl, |
1da177e4 LT |
790 | struct xfrm_policy *pol, int *err, |
791 | unsigned short family) | |
792 | { | |
08ec9af1 | 793 | static xfrm_address_t saddr_wildcard = { }; |
5447c5e4 | 794 | struct net *net = xp_net(pol); |
6a783c90 | 795 | unsigned int h, h_wildcard; |
8f126e37 | 796 | struct hlist_node *entry; |
37b08e34 | 797 | struct xfrm_state *x, *x0, *to_put; |
1da177e4 LT |
798 | int acquire_in_progress = 0; |
799 | int error = 0; | |
800 | struct xfrm_state *best = NULL; | |
bd55775c | 801 | u32 mark = pol->mark.v & pol->mark.m; |
8444cf71 | 802 | unsigned short encap_family = tmpl->encap_family; |
a716c119 | 803 | |
37b08e34 DM |
804 | to_put = NULL; |
805 | ||
1da177e4 | 806 | spin_lock_bh(&xfrm_state_lock); |
8444cf71 | 807 | h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family); |
5447c5e4 | 808 | hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) { |
8444cf71 | 809 | if (x->props.family == encap_family && |
1da177e4 | 810 | x->props.reqid == tmpl->reqid && |
3d6acfa7 | 811 | (mark & x->mark.m) == x->mark.v && |
fbd9a5b4 | 812 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
8444cf71 | 813 | xfrm_state_addr_check(x, daddr, saddr, encap_family) && |
1da177e4 LT |
814 | tmpl->mode == x->props.mode && |
815 | tmpl->id.proto == x->id.proto && | |
08ec9af1 | 816 | (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) |
1f673c5f | 817 | xfrm_state_look_at(pol, x, fl, encap_family, |
08ec9af1 DM |
818 | &best, &acquire_in_progress, &error); |
819 | } | |
820 | if (best) | |
821 | goto found; | |
822 | ||
8444cf71 | 823 | h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, encap_family); |
6a783c90 | 824 | hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h_wildcard, bydst) { |
8444cf71 | 825 | if (x->props.family == encap_family && |
08ec9af1 | 826 | x->props.reqid == tmpl->reqid && |
3d6acfa7 | 827 | (mark & x->mark.m) == x->mark.v && |
08ec9af1 | 828 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
8444cf71 | 829 | xfrm_state_addr_check(x, daddr, saddr, encap_family) && |
08ec9af1 DM |
830 | tmpl->mode == x->props.mode && |
831 | tmpl->id.proto == x->id.proto && | |
832 | (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) | |
1f673c5f | 833 | xfrm_state_look_at(pol, x, fl, encap_family, |
08ec9af1 | 834 | &best, &acquire_in_progress, &error); |
1da177e4 LT |
835 | } |
836 | ||
08ec9af1 | 837 | found: |
1da177e4 LT |
838 | x = best; |
839 | if (!x && !error && !acquire_in_progress) { | |
5c5d281a | 840 | if (tmpl->id.spi && |
bd55775c | 841 | (x0 = __xfrm_state_lookup(net, mark, daddr, tmpl->id.spi, |
8444cf71 | 842 | tmpl->id.proto, encap_family)) != NULL) { |
37b08e34 | 843 | to_put = x0; |
1da177e4 LT |
844 | error = -EEXIST; |
845 | goto out; | |
846 | } | |
5447c5e4 | 847 | x = xfrm_state_alloc(net); |
1da177e4 LT |
848 | if (x == NULL) { |
849 | error = -ENOMEM; | |
850 | goto out; | |
851 | } | |
8444cf71 | 852 | /* Initialize temporary state matching only |
1da177e4 | 853 | * to current session. */ |
8444cf71 | 854 | xfrm_init_tempstate(x, fl, tmpl, daddr, saddr, family); |
bd55775c | 855 | memcpy(&x->mark, &pol->mark, sizeof(x->mark)); |
1da177e4 | 856 | |
1d28f42c | 857 | error = security_xfrm_state_alloc_acquire(x, pol->security, fl->flowi_secid); |
e0d1caa7 VY |
858 | if (error) { |
859 | x->km.state = XFRM_STATE_DEAD; | |
37b08e34 | 860 | to_put = x; |
e0d1caa7 VY |
861 | x = NULL; |
862 | goto out; | |
863 | } | |
864 | ||
1da177e4 LT |
865 | if (km_query(x, tmpl, pol) == 0) { |
866 | x->km.state = XFRM_STATE_ACQ; | |
5447c5e4 AD |
867 | list_add(&x->km.all, &net->xfrm.state_all); |
868 | hlist_add_head(&x->bydst, net->xfrm.state_bydst+h); | |
8444cf71 | 869 | h = xfrm_src_hash(net, daddr, saddr, encap_family); |
5447c5e4 | 870 | hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h); |
1da177e4 | 871 | if (x->id.spi) { |
8444cf71 | 872 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, encap_family); |
5447c5e4 | 873 | hlist_add_head(&x->byspi, net->xfrm.state_byspi+h); |
1da177e4 | 874 | } |
b27aeadb | 875 | x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires; |
9e0d57fd | 876 | tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL); |
5447c5e4 AD |
877 | net->xfrm.state_num++; |
878 | xfrm_hash_grow_check(net, x->bydst.next != NULL); | |
1da177e4 LT |
879 | } else { |
880 | x->km.state = XFRM_STATE_DEAD; | |
37b08e34 | 881 | to_put = x; |
1da177e4 LT |
882 | x = NULL; |
883 | error = -ESRCH; | |
884 | } | |
885 | } | |
886 | out: | |
887 | if (x) | |
888 | xfrm_state_hold(x); | |
889 | else | |
890 | *err = acquire_in_progress ? -EAGAIN : error; | |
891 | spin_unlock_bh(&xfrm_state_lock); | |
37b08e34 DM |
892 | if (to_put) |
893 | xfrm_state_put(to_put); | |
1da177e4 LT |
894 | return x; |
895 | } | |
896 | ||
628529b6 | 897 | struct xfrm_state * |
bd55775c | 898 | xfrm_stateonly_find(struct net *net, u32 mark, |
5447c5e4 | 899 | xfrm_address_t *daddr, xfrm_address_t *saddr, |
628529b6 JHS |
900 | unsigned short family, u8 mode, u8 proto, u32 reqid) |
901 | { | |
4bda4f25 | 902 | unsigned int h; |
628529b6 JHS |
903 | struct xfrm_state *rx = NULL, *x = NULL; |
904 | struct hlist_node *entry; | |
905 | ||
906 | spin_lock(&xfrm_state_lock); | |
5447c5e4 AD |
907 | h = xfrm_dst_hash(net, daddr, saddr, reqid, family); |
908 | hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) { | |
628529b6 JHS |
909 | if (x->props.family == family && |
910 | x->props.reqid == reqid && | |
3d6acfa7 | 911 | (mark & x->mark.m) == x->mark.v && |
628529b6 JHS |
912 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
913 | xfrm_state_addr_check(x, daddr, saddr, family) && | |
914 | mode == x->props.mode && | |
915 | proto == x->id.proto && | |
916 | x->km.state == XFRM_STATE_VALID) { | |
917 | rx = x; | |
918 | break; | |
919 | } | |
920 | } | |
921 | ||
922 | if (rx) | |
923 | xfrm_state_hold(rx); | |
924 | spin_unlock(&xfrm_state_lock); | |
925 | ||
926 | ||
927 | return rx; | |
928 | } | |
929 | EXPORT_SYMBOL(xfrm_stateonly_find); | |
930 | ||
1da177e4 LT |
931 | static void __xfrm_state_insert(struct xfrm_state *x) |
932 | { | |
98806f75 | 933 | struct net *net = xs_net(x); |
a624c108 | 934 | unsigned int h; |
1da177e4 | 935 | |
98806f75 | 936 | list_add(&x->km.all, &net->xfrm.state_all); |
4c563f76 | 937 | |
98806f75 | 938 | h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr, |
c1969f29 | 939 | x->props.reqid, x->props.family); |
98806f75 | 940 | hlist_add_head(&x->bydst, net->xfrm.state_bydst+h); |
1da177e4 | 941 | |
98806f75 AD |
942 | h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family); |
943 | hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h); | |
1da177e4 | 944 | |
7b4dc360 | 945 | if (x->id.spi) { |
98806f75 | 946 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, |
6c44e6b7 MN |
947 | x->props.family); |
948 | ||
98806f75 | 949 | hlist_add_head(&x->byspi, net->xfrm.state_byspi+h); |
6c44e6b7 MN |
950 | } |
951 | ||
9e0d57fd | 952 | tasklet_hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL); |
a47f0ce0 DM |
953 | if (x->replay_maxage) |
954 | mod_timer(&x->rtimer, jiffies + x->replay_maxage); | |
f8cd5488 | 955 | |
98806f75 | 956 | wake_up(&net->xfrm.km_waitq); |
f034b5d4 | 957 | |
98806f75 | 958 | net->xfrm.state_num++; |
f034b5d4 | 959 | |
98806f75 | 960 | xfrm_hash_grow_check(net, x->bydst.next != NULL); |
1da177e4 LT |
961 | } |
962 | ||
c7f5ea3a DM |
963 | /* xfrm_state_lock is held */ |
964 | static void __xfrm_state_bump_genids(struct xfrm_state *xnew) | |
965 | { | |
98806f75 | 966 | struct net *net = xs_net(xnew); |
c7f5ea3a DM |
967 | unsigned short family = xnew->props.family; |
968 | u32 reqid = xnew->props.reqid; | |
969 | struct xfrm_state *x; | |
970 | struct hlist_node *entry; | |
971 | unsigned int h; | |
3d6acfa7 | 972 | u32 mark = xnew->mark.v & xnew->mark.m; |
c7f5ea3a | 973 | |
98806f75 AD |
974 | h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family); |
975 | hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) { | |
c7f5ea3a DM |
976 | if (x->props.family == family && |
977 | x->props.reqid == reqid && | |
3d6acfa7 | 978 | (mark & x->mark.m) == x->mark.v && |
c1969f29 DM |
979 | !xfrm_addr_cmp(&x->id.daddr, &xnew->id.daddr, family) && |
980 | !xfrm_addr_cmp(&x->props.saddr, &xnew->props.saddr, family)) | |
34996cb9 | 981 | x->genid++; |
c7f5ea3a DM |
982 | } |
983 | } | |
984 | ||
1da177e4 LT |
985 | void xfrm_state_insert(struct xfrm_state *x) |
986 | { | |
987 | spin_lock_bh(&xfrm_state_lock); | |
c7f5ea3a | 988 | __xfrm_state_bump_genids(x); |
1da177e4 LT |
989 | __xfrm_state_insert(x); |
990 | spin_unlock_bh(&xfrm_state_lock); | |
991 | } | |
992 | EXPORT_SYMBOL(xfrm_state_insert); | |
993 | ||
2770834c | 994 | /* xfrm_state_lock is held */ |
a70486f0 DM |
995 | static struct xfrm_state *__find_acq_core(struct net *net, struct xfrm_mark *m, |
996 | unsigned short family, u8 mode, | |
997 | u32 reqid, u8 proto, | |
998 | const xfrm_address_t *daddr, | |
999 | const xfrm_address_t *saddr, int create) | |
2770834c | 1000 | { |
5447c5e4 | 1001 | unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family); |
8f126e37 | 1002 | struct hlist_node *entry; |
2770834c | 1003 | struct xfrm_state *x; |
3d6acfa7 | 1004 | u32 mark = m->v & m->m; |
2770834c | 1005 | |
5447c5e4 | 1006 | hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) { |
2770834c DM |
1007 | if (x->props.reqid != reqid || |
1008 | x->props.mode != mode || | |
1009 | x->props.family != family || | |
1010 | x->km.state != XFRM_STATE_ACQ || | |
75e252d9 | 1011 | x->id.spi != 0 || |
1802571b | 1012 | x->id.proto != proto || |
3d6acfa7 | 1013 | (mark & x->mark.m) != x->mark.v || |
1802571b WY |
1014 | xfrm_addr_cmp(&x->id.daddr, daddr, family) || |
1015 | xfrm_addr_cmp(&x->props.saddr, saddr, family)) | |
2770834c DM |
1016 | continue; |
1017 | ||
2770834c DM |
1018 | xfrm_state_hold(x); |
1019 | return x; | |
1020 | } | |
1021 | ||
1022 | if (!create) | |
1023 | return NULL; | |
1024 | ||
5447c5e4 | 1025 | x = xfrm_state_alloc(net); |
2770834c DM |
1026 | if (likely(x)) { |
1027 | switch (family) { | |
1028 | case AF_INET: | |
1029 | x->sel.daddr.a4 = daddr->a4; | |
1030 | x->sel.saddr.a4 = saddr->a4; | |
1031 | x->sel.prefixlen_d = 32; | |
1032 | x->sel.prefixlen_s = 32; | |
1033 | x->props.saddr.a4 = saddr->a4; | |
1034 | x->id.daddr.a4 = daddr->a4; | |
1035 | break; | |
1036 | ||
1037 | case AF_INET6: | |
1038 | ipv6_addr_copy((struct in6_addr *)x->sel.daddr.a6, | |
b71d1d42 | 1039 | (const struct in6_addr *)daddr); |
2770834c | 1040 | ipv6_addr_copy((struct in6_addr *)x->sel.saddr.a6, |
b71d1d42 | 1041 | (const struct in6_addr *)saddr); |
2770834c DM |
1042 | x->sel.prefixlen_d = 128; |
1043 | x->sel.prefixlen_s = 128; | |
1044 | ipv6_addr_copy((struct in6_addr *)x->props.saddr.a6, | |
b71d1d42 | 1045 | (const struct in6_addr *)saddr); |
2770834c | 1046 | ipv6_addr_copy((struct in6_addr *)x->id.daddr.a6, |
b71d1d42 | 1047 | (const struct in6_addr *)daddr); |
2770834c | 1048 | break; |
3ff50b79 | 1049 | } |
2770834c DM |
1050 | |
1051 | x->km.state = XFRM_STATE_ACQ; | |
1052 | x->id.proto = proto; | |
1053 | x->props.family = family; | |
1054 | x->props.mode = mode; | |
1055 | x->props.reqid = reqid; | |
bd55775c JHS |
1056 | x->mark.v = m->v; |
1057 | x->mark.m = m->m; | |
b27aeadb | 1058 | x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires; |
2770834c | 1059 | xfrm_state_hold(x); |
9e0d57fd | 1060 | tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL); |
5447c5e4 AD |
1061 | list_add(&x->km.all, &net->xfrm.state_all); |
1062 | hlist_add_head(&x->bydst, net->xfrm.state_bydst+h); | |
1063 | h = xfrm_src_hash(net, daddr, saddr, family); | |
1064 | hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h); | |
918049f0 | 1065 | |
5447c5e4 | 1066 | net->xfrm.state_num++; |
918049f0 | 1067 | |
5447c5e4 | 1068 | xfrm_hash_grow_check(net, x->bydst.next != NULL); |
2770834c DM |
1069 | } |
1070 | ||
1071 | return x; | |
1072 | } | |
1073 | ||
bd55775c | 1074 | static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); |
1da177e4 LT |
1075 | |
1076 | int xfrm_state_add(struct xfrm_state *x) | |
1077 | { | |
5447c5e4 | 1078 | struct net *net = xs_net(x); |
37b08e34 | 1079 | struct xfrm_state *x1, *to_put; |
1da177e4 LT |
1080 | int family; |
1081 | int err; | |
bd55775c | 1082 | u32 mark = x->mark.v & x->mark.m; |
eb2971b6 | 1083 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
1da177e4 LT |
1084 | |
1085 | family = x->props.family; | |
1da177e4 | 1086 | |
37b08e34 DM |
1087 | to_put = NULL; |
1088 | ||
1da177e4 LT |
1089 | spin_lock_bh(&xfrm_state_lock); |
1090 | ||
edcd5821 | 1091 | x1 = __xfrm_state_locate(x, use_spi, family); |
1da177e4 | 1092 | if (x1) { |
37b08e34 | 1093 | to_put = x1; |
1da177e4 LT |
1094 | x1 = NULL; |
1095 | err = -EEXIST; | |
1096 | goto out; | |
1097 | } | |
1098 | ||
eb2971b6 | 1099 | if (use_spi && x->km.seq) { |
bd55775c | 1100 | x1 = __xfrm_find_acq_byseq(net, mark, x->km.seq); |
75e252d9 JL |
1101 | if (x1 && ((x1->id.proto != x->id.proto) || |
1102 | xfrm_addr_cmp(&x1->id.daddr, &x->id.daddr, family))) { | |
37b08e34 | 1103 | to_put = x1; |
1da177e4 LT |
1104 | x1 = NULL; |
1105 | } | |
1106 | } | |
1107 | ||
eb2971b6 | 1108 | if (use_spi && !x1) |
bd55775c JHS |
1109 | x1 = __find_acq_core(net, &x->mark, family, x->props.mode, |
1110 | x->props.reqid, x->id.proto, | |
2770834c | 1111 | &x->id.daddr, &x->props.saddr, 0); |
1da177e4 | 1112 | |
c7f5ea3a | 1113 | __xfrm_state_bump_genids(x); |
1da177e4 LT |
1114 | __xfrm_state_insert(x); |
1115 | err = 0; | |
1116 | ||
1117 | out: | |
1118 | spin_unlock_bh(&xfrm_state_lock); | |
1da177e4 LT |
1119 | |
1120 | if (x1) { | |
1121 | xfrm_state_delete(x1); | |
1122 | xfrm_state_put(x1); | |
1123 | } | |
1124 | ||
37b08e34 DM |
1125 | if (to_put) |
1126 | xfrm_state_put(to_put); | |
1127 | ||
1da177e4 LT |
1128 | return err; |
1129 | } | |
1130 | EXPORT_SYMBOL(xfrm_state_add); | |
1131 | ||
80c9abaa | 1132 | #ifdef CONFIG_XFRM_MIGRATE |
6666351d | 1133 | static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, int *errp) |
80c9abaa | 1134 | { |
98806f75 | 1135 | struct net *net = xs_net(orig); |
80c9abaa | 1136 | int err = -ENOMEM; |
98806f75 | 1137 | struct xfrm_state *x = xfrm_state_alloc(net); |
80c9abaa | 1138 | if (!x) |
553f9118 | 1139 | goto out; |
80c9abaa SS |
1140 | |
1141 | memcpy(&x->id, &orig->id, sizeof(x->id)); | |
1142 | memcpy(&x->sel, &orig->sel, sizeof(x->sel)); | |
1143 | memcpy(&x->lft, &orig->lft, sizeof(x->lft)); | |
1144 | x->props.mode = orig->props.mode; | |
1145 | x->props.replay_window = orig->props.replay_window; | |
1146 | x->props.reqid = orig->props.reqid; | |
1147 | x->props.family = orig->props.family; | |
1148 | x->props.saddr = orig->props.saddr; | |
1149 | ||
1150 | if (orig->aalg) { | |
4447bb33 | 1151 | x->aalg = xfrm_algo_auth_clone(orig->aalg); |
80c9abaa SS |
1152 | if (!x->aalg) |
1153 | goto error; | |
1154 | } | |
1155 | x->props.aalgo = orig->props.aalgo; | |
1156 | ||
1157 | if (orig->ealg) { | |
1158 | x->ealg = xfrm_algo_clone(orig->ealg); | |
1159 | if (!x->ealg) | |
1160 | goto error; | |
1161 | } | |
1162 | x->props.ealgo = orig->props.ealgo; | |
1163 | ||
1164 | if (orig->calg) { | |
1165 | x->calg = xfrm_algo_clone(orig->calg); | |
1166 | if (!x->calg) | |
1167 | goto error; | |
1168 | } | |
1169 | x->props.calgo = orig->props.calgo; | |
1170 | ||
a716c119 | 1171 | if (orig->encap) { |
80c9abaa SS |
1172 | x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL); |
1173 | if (!x->encap) | |
1174 | goto error; | |
1175 | } | |
1176 | ||
1177 | if (orig->coaddr) { | |
1178 | x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr), | |
1179 | GFP_KERNEL); | |
1180 | if (!x->coaddr) | |
1181 | goto error; | |
1182 | } | |
1183 | ||
af2f464e SK |
1184 | if (orig->replay_esn) { |
1185 | err = xfrm_replay_clone(x, orig); | |
1186 | if (err) | |
1187 | goto error; | |
1188 | } | |
1189 | ||
bd55775c JHS |
1190 | memcpy(&x->mark, &orig->mark, sizeof(x->mark)); |
1191 | ||
80c9abaa SS |
1192 | err = xfrm_init_state(x); |
1193 | if (err) | |
1194 | goto error; | |
1195 | ||
1196 | x->props.flags = orig->props.flags; | |
1197 | ||
1198 | x->curlft.add_time = orig->curlft.add_time; | |
1199 | x->km.state = orig->km.state; | |
1200 | x->km.seq = orig->km.seq; | |
1201 | ||
1202 | return x; | |
1203 | ||
1204 | error: | |
553f9118 HX |
1205 | xfrm_state_put(x); |
1206 | out: | |
80c9abaa SS |
1207 | if (errp) |
1208 | *errp = err; | |
80c9abaa SS |
1209 | return NULL; |
1210 | } | |
80c9abaa SS |
1211 | |
1212 | /* xfrm_state_lock is held */ | |
1213 | struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m) | |
1214 | { | |
1215 | unsigned int h; | |
1216 | struct xfrm_state *x; | |
1217 | struct hlist_node *entry; | |
1218 | ||
1219 | if (m->reqid) { | |
64d0cd00 | 1220 | h = xfrm_dst_hash(&init_net, &m->old_daddr, &m->old_saddr, |
80c9abaa | 1221 | m->reqid, m->old_family); |
73d189dc | 1222 | hlist_for_each_entry(x, entry, init_net.xfrm.state_bydst+h, bydst) { |
80c9abaa SS |
1223 | if (x->props.mode != m->mode || |
1224 | x->id.proto != m->proto) | |
1225 | continue; | |
1226 | if (m->reqid && x->props.reqid != m->reqid) | |
1227 | continue; | |
1228 | if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr, | |
1229 | m->old_family) || | |
1230 | xfrm_addr_cmp(&x->props.saddr, &m->old_saddr, | |
1231 | m->old_family)) | |
1232 | continue; | |
1233 | xfrm_state_hold(x); | |
1234 | return x; | |
1235 | } | |
1236 | } else { | |
64d0cd00 | 1237 | h = xfrm_src_hash(&init_net, &m->old_daddr, &m->old_saddr, |
80c9abaa | 1238 | m->old_family); |
d320bbb3 | 1239 | hlist_for_each_entry(x, entry, init_net.xfrm.state_bysrc+h, bysrc) { |
80c9abaa SS |
1240 | if (x->props.mode != m->mode || |
1241 | x->id.proto != m->proto) | |
1242 | continue; | |
1243 | if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr, | |
1244 | m->old_family) || | |
1245 | xfrm_addr_cmp(&x->props.saddr, &m->old_saddr, | |
1246 | m->old_family)) | |
1247 | continue; | |
1248 | xfrm_state_hold(x); | |
1249 | return x; | |
1250 | } | |
1251 | } | |
1252 | ||
a716c119 | 1253 | return NULL; |
80c9abaa SS |
1254 | } |
1255 | EXPORT_SYMBOL(xfrm_migrate_state_find); | |
1256 | ||
1257 | struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, | |
1258 | struct xfrm_migrate *m) | |
1259 | { | |
1260 | struct xfrm_state *xc; | |
1261 | int err; | |
1262 | ||
1263 | xc = xfrm_state_clone(x, &err); | |
1264 | if (!xc) | |
1265 | return NULL; | |
1266 | ||
1267 | memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr)); | |
1268 | memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr)); | |
1269 | ||
1270 | /* add state */ | |
1271 | if (!xfrm_addr_cmp(&x->id.daddr, &m->new_daddr, m->new_family)) { | |
1272 | /* a care is needed when the destination address of the | |
1273 | state is to be updated as it is a part of triplet */ | |
1274 | xfrm_state_insert(xc); | |
1275 | } else { | |
1276 | if ((err = xfrm_state_add(xc)) < 0) | |
1277 | goto error; | |
1278 | } | |
1279 | ||
1280 | return xc; | |
1281 | error: | |
78347c8c | 1282 | xfrm_state_put(xc); |
80c9abaa SS |
1283 | return NULL; |
1284 | } | |
1285 | EXPORT_SYMBOL(xfrm_state_migrate); | |
1286 | #endif | |
1287 | ||
1da177e4 LT |
1288 | int xfrm_state_update(struct xfrm_state *x) |
1289 | { | |
37b08e34 | 1290 | struct xfrm_state *x1, *to_put; |
1da177e4 | 1291 | int err; |
eb2971b6 | 1292 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
1da177e4 | 1293 | |
37b08e34 DM |
1294 | to_put = NULL; |
1295 | ||
1da177e4 | 1296 | spin_lock_bh(&xfrm_state_lock); |
edcd5821 | 1297 | x1 = __xfrm_state_locate(x, use_spi, x->props.family); |
1da177e4 LT |
1298 | |
1299 | err = -ESRCH; | |
1300 | if (!x1) | |
1301 | goto out; | |
1302 | ||
1303 | if (xfrm_state_kern(x1)) { | |
37b08e34 | 1304 | to_put = x1; |
1da177e4 LT |
1305 | err = -EEXIST; |
1306 | goto out; | |
1307 | } | |
1308 | ||
1309 | if (x1->km.state == XFRM_STATE_ACQ) { | |
1310 | __xfrm_state_insert(x); | |
1311 | x = NULL; | |
1312 | } | |
1313 | err = 0; | |
1314 | ||
1315 | out: | |
1316 | spin_unlock_bh(&xfrm_state_lock); | |
1da177e4 | 1317 | |
37b08e34 DM |
1318 | if (to_put) |
1319 | xfrm_state_put(to_put); | |
1320 | ||
1da177e4 LT |
1321 | if (err) |
1322 | return err; | |
1323 | ||
1324 | if (!x) { | |
1325 | xfrm_state_delete(x1); | |
1326 | xfrm_state_put(x1); | |
1327 | return 0; | |
1328 | } | |
1329 | ||
1330 | err = -EINVAL; | |
1331 | spin_lock_bh(&x1->lock); | |
1332 | if (likely(x1->km.state == XFRM_STATE_VALID)) { | |
1333 | if (x->encap && x1->encap) | |
1334 | memcpy(x1->encap, x->encap, sizeof(*x1->encap)); | |
060f02a3 NT |
1335 | if (x->coaddr && x1->coaddr) { |
1336 | memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr)); | |
1337 | } | |
1338 | if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel))) | |
1339 | memcpy(&x1->sel, &x->sel, sizeof(x1->sel)); | |
1da177e4 LT |
1340 | memcpy(&x1->lft, &x->lft, sizeof(x1->lft)); |
1341 | x1->km.dying = 0; | |
1342 | ||
9e0d57fd | 1343 | tasklet_hrtimer_start(&x1->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL); |
1da177e4 LT |
1344 | if (x1->curlft.use_time) |
1345 | xfrm_state_check_expire(x1); | |
1346 | ||
1347 | err = 0; | |
1348 | } | |
1349 | spin_unlock_bh(&x1->lock); | |
1350 | ||
1351 | xfrm_state_put(x1); | |
1352 | ||
1353 | return err; | |
1354 | } | |
1355 | EXPORT_SYMBOL(xfrm_state_update); | |
1356 | ||
1357 | int xfrm_state_check_expire(struct xfrm_state *x) | |
1358 | { | |
1359 | if (!x->curlft.use_time) | |
9d729f72 | 1360 | x->curlft.use_time = get_seconds(); |
1da177e4 LT |
1361 | |
1362 | if (x->km.state != XFRM_STATE_VALID) | |
1363 | return -EINVAL; | |
1364 | ||
1365 | if (x->curlft.bytes >= x->lft.hard_byte_limit || | |
1366 | x->curlft.packets >= x->lft.hard_packet_limit) { | |
4666faab | 1367 | x->km.state = XFRM_STATE_EXPIRED; |
9e0d57fd | 1368 | tasklet_hrtimer_start(&x->mtimer, ktime_set(0,0), HRTIMER_MODE_REL); |
1da177e4 LT |
1369 | return -EINVAL; |
1370 | } | |
1371 | ||
1372 | if (!x->km.dying && | |
1373 | (x->curlft.bytes >= x->lft.soft_byte_limit || | |
4666faab HX |
1374 | x->curlft.packets >= x->lft.soft_packet_limit)) { |
1375 | x->km.dying = 1; | |
53bc6b4d | 1376 | km_state_expired(x, 0, 0); |
4666faab | 1377 | } |
1da177e4 LT |
1378 | return 0; |
1379 | } | |
1380 | EXPORT_SYMBOL(xfrm_state_check_expire); | |
1381 | ||
1da177e4 | 1382 | struct xfrm_state * |
a70486f0 | 1383 | xfrm_state_lookup(struct net *net, u32 mark, const xfrm_address_t *daddr, __be32 spi, |
bd55775c | 1384 | u8 proto, unsigned short family) |
1da177e4 LT |
1385 | { |
1386 | struct xfrm_state *x; | |
1da177e4 LT |
1387 | |
1388 | spin_lock_bh(&xfrm_state_lock); | |
bd55775c | 1389 | x = __xfrm_state_lookup(net, mark, daddr, spi, proto, family); |
1da177e4 | 1390 | spin_unlock_bh(&xfrm_state_lock); |
1da177e4 LT |
1391 | return x; |
1392 | } | |
1393 | EXPORT_SYMBOL(xfrm_state_lookup); | |
1394 | ||
1395 | struct xfrm_state * | |
bd55775c | 1396 | xfrm_state_lookup_byaddr(struct net *net, u32 mark, |
a70486f0 | 1397 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
eb2971b6 MN |
1398 | u8 proto, unsigned short family) |
1399 | { | |
1400 | struct xfrm_state *x; | |
eb2971b6 MN |
1401 | |
1402 | spin_lock_bh(&xfrm_state_lock); | |
bd55775c | 1403 | x = __xfrm_state_lookup_byaddr(net, mark, daddr, saddr, proto, family); |
eb2971b6 | 1404 | spin_unlock_bh(&xfrm_state_lock); |
eb2971b6 MN |
1405 | return x; |
1406 | } | |
1407 | EXPORT_SYMBOL(xfrm_state_lookup_byaddr); | |
1408 | ||
1409 | struct xfrm_state * | |
bd55775c | 1410 | xfrm_find_acq(struct net *net, struct xfrm_mark *mark, u8 mode, u32 reqid, u8 proto, |
a70486f0 | 1411 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
1da177e4 LT |
1412 | int create, unsigned short family) |
1413 | { | |
1414 | struct xfrm_state *x; | |
1da177e4 LT |
1415 | |
1416 | spin_lock_bh(&xfrm_state_lock); | |
bd55775c | 1417 | x = __find_acq_core(net, mark, family, mode, reqid, proto, daddr, saddr, create); |
1da177e4 | 1418 | spin_unlock_bh(&xfrm_state_lock); |
2770834c | 1419 | |
1da177e4 LT |
1420 | return x; |
1421 | } | |
1422 | EXPORT_SYMBOL(xfrm_find_acq); | |
1423 | ||
41a49cc3 MN |
1424 | #ifdef CONFIG_XFRM_SUB_POLICY |
1425 | int | |
1426 | xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, | |
1427 | unsigned short family) | |
1428 | { | |
1429 | int err = 0; | |
1430 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
1431 | if (!afinfo) | |
1432 | return -EAFNOSUPPORT; | |
1433 | ||
1434 | spin_lock_bh(&xfrm_state_lock); | |
1435 | if (afinfo->tmpl_sort) | |
1436 | err = afinfo->tmpl_sort(dst, src, n); | |
1437 | spin_unlock_bh(&xfrm_state_lock); | |
1438 | xfrm_state_put_afinfo(afinfo); | |
1439 | return err; | |
1440 | } | |
1441 | EXPORT_SYMBOL(xfrm_tmpl_sort); | |
1442 | ||
1443 | int | |
1444 | xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, | |
1445 | unsigned short family) | |
1446 | { | |
1447 | int err = 0; | |
1448 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
1449 | if (!afinfo) | |
1450 | return -EAFNOSUPPORT; | |
1451 | ||
1452 | spin_lock_bh(&xfrm_state_lock); | |
1453 | if (afinfo->state_sort) | |
1454 | err = afinfo->state_sort(dst, src, n); | |
1455 | spin_unlock_bh(&xfrm_state_lock); | |
1456 | xfrm_state_put_afinfo(afinfo); | |
1457 | return err; | |
1458 | } | |
1459 | EXPORT_SYMBOL(xfrm_state_sort); | |
1460 | #endif | |
1461 | ||
1da177e4 LT |
1462 | /* Silly enough, but I'm lazy to build resolution list */ |
1463 | ||
bd55775c | 1464 | static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq) |
1da177e4 LT |
1465 | { |
1466 | int i; | |
1da177e4 | 1467 | |
5447c5e4 | 1468 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
8f126e37 DM |
1469 | struct hlist_node *entry; |
1470 | struct xfrm_state *x; | |
1471 | ||
5447c5e4 | 1472 | hlist_for_each_entry(x, entry, net->xfrm.state_bydst+i, bydst) { |
8f126e37 | 1473 | if (x->km.seq == seq && |
3d6acfa7 | 1474 | (mark & x->mark.m) == x->mark.v && |
8f126e37 | 1475 | x->km.state == XFRM_STATE_ACQ) { |
1da177e4 LT |
1476 | xfrm_state_hold(x); |
1477 | return x; | |
1478 | } | |
1479 | } | |
1480 | } | |
1481 | return NULL; | |
1482 | } | |
1483 | ||
bd55775c | 1484 | struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq) |
1da177e4 LT |
1485 | { |
1486 | struct xfrm_state *x; | |
1487 | ||
1488 | spin_lock_bh(&xfrm_state_lock); | |
bd55775c | 1489 | x = __xfrm_find_acq_byseq(net, mark, seq); |
1da177e4 LT |
1490 | spin_unlock_bh(&xfrm_state_lock); |
1491 | return x; | |
1492 | } | |
1493 | EXPORT_SYMBOL(xfrm_find_acq_byseq); | |
1494 | ||
1495 | u32 xfrm_get_acqseq(void) | |
1496 | { | |
1497 | u32 res; | |
6836b9bd | 1498 | static atomic_t acqseq; |
1499 | ||
1500 | do { | |
1501 | res = atomic_inc_return(&acqseq); | |
1502 | } while (!res); | |
1da177e4 | 1503 | |
1da177e4 LT |
1504 | return res; |
1505 | } | |
1506 | EXPORT_SYMBOL(xfrm_get_acqseq); | |
1507 | ||
658b219e | 1508 | int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high) |
1da177e4 | 1509 | { |
221df1ed | 1510 | struct net *net = xs_net(x); |
f034b5d4 | 1511 | unsigned int h; |
1da177e4 | 1512 | struct xfrm_state *x0; |
658b219e HX |
1513 | int err = -ENOENT; |
1514 | __be32 minspi = htonl(low); | |
1515 | __be32 maxspi = htonl(high); | |
bd55775c | 1516 | u32 mark = x->mark.v & x->mark.m; |
1da177e4 | 1517 | |
658b219e HX |
1518 | spin_lock_bh(&x->lock); |
1519 | if (x->km.state == XFRM_STATE_DEAD) | |
1520 | goto unlock; | |
1521 | ||
1522 | err = 0; | |
1da177e4 | 1523 | if (x->id.spi) |
658b219e HX |
1524 | goto unlock; |
1525 | ||
1526 | err = -ENOENT; | |
1da177e4 LT |
1527 | |
1528 | if (minspi == maxspi) { | |
bd55775c | 1529 | x0 = xfrm_state_lookup(net, mark, &x->id.daddr, minspi, x->id.proto, x->props.family); |
1da177e4 LT |
1530 | if (x0) { |
1531 | xfrm_state_put(x0); | |
658b219e | 1532 | goto unlock; |
1da177e4 LT |
1533 | } |
1534 | x->id.spi = minspi; | |
1535 | } else { | |
1536 | u32 spi = 0; | |
26977b4e AV |
1537 | for (h=0; h<high-low+1; h++) { |
1538 | spi = low + net_random()%(high-low+1); | |
bd55775c | 1539 | x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family); |
1da177e4 LT |
1540 | if (x0 == NULL) { |
1541 | x->id.spi = htonl(spi); | |
1542 | break; | |
1543 | } | |
1544 | xfrm_state_put(x0); | |
1545 | } | |
1546 | } | |
1547 | if (x->id.spi) { | |
1548 | spin_lock_bh(&xfrm_state_lock); | |
12604d8a AD |
1549 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family); |
1550 | hlist_add_head(&x->byspi, net->xfrm.state_byspi+h); | |
1da177e4 | 1551 | spin_unlock_bh(&xfrm_state_lock); |
658b219e HX |
1552 | |
1553 | err = 0; | |
1da177e4 | 1554 | } |
658b219e HX |
1555 | |
1556 | unlock: | |
1557 | spin_unlock_bh(&x->lock); | |
1558 | ||
1559 | return err; | |
1da177e4 LT |
1560 | } |
1561 | EXPORT_SYMBOL(xfrm_alloc_spi); | |
1562 | ||
284fa7da | 1563 | int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, |
4c563f76 | 1564 | int (*func)(struct xfrm_state *, int, void*), |
1da177e4 LT |
1565 | void *data) |
1566 | { | |
12a169e7 HX |
1567 | struct xfrm_state *state; |
1568 | struct xfrm_state_walk *x; | |
1da177e4 LT |
1569 | int err = 0; |
1570 | ||
12a169e7 | 1571 | if (walk->seq != 0 && list_empty(&walk->all)) |
4c563f76 TT |
1572 | return 0; |
1573 | ||
1da177e4 | 1574 | spin_lock_bh(&xfrm_state_lock); |
12a169e7 | 1575 | if (list_empty(&walk->all)) |
284fa7da | 1576 | x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all); |
12a169e7 HX |
1577 | else |
1578 | x = list_entry(&walk->all, struct xfrm_state_walk, all); | |
284fa7da | 1579 | list_for_each_entry_from(x, &net->xfrm.state_all, all) { |
12a169e7 | 1580 | if (x->state == XFRM_STATE_DEAD) |
4c563f76 | 1581 | continue; |
12a169e7 HX |
1582 | state = container_of(x, struct xfrm_state, km); |
1583 | if (!xfrm_id_proto_match(state->id.proto, walk->proto)) | |
4c563f76 | 1584 | continue; |
12a169e7 HX |
1585 | err = func(state, walk->seq, data); |
1586 | if (err) { | |
1587 | list_move_tail(&walk->all, &x->all); | |
1588 | goto out; | |
1da177e4 | 1589 | } |
12a169e7 | 1590 | walk->seq++; |
1da177e4 | 1591 | } |
12a169e7 | 1592 | if (walk->seq == 0) { |
1da177e4 LT |
1593 | err = -ENOENT; |
1594 | goto out; | |
1595 | } | |
12a169e7 | 1596 | list_del_init(&walk->all); |
1da177e4 LT |
1597 | out: |
1598 | spin_unlock_bh(&xfrm_state_lock); | |
1599 | return err; | |
1600 | } | |
1601 | EXPORT_SYMBOL(xfrm_state_walk); | |
1602 | ||
5c182458 HX |
1603 | void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto) |
1604 | { | |
12a169e7 | 1605 | INIT_LIST_HEAD(&walk->all); |
5c182458 | 1606 | walk->proto = proto; |
12a169e7 HX |
1607 | walk->state = XFRM_STATE_DEAD; |
1608 | walk->seq = 0; | |
5c182458 HX |
1609 | } |
1610 | EXPORT_SYMBOL(xfrm_state_walk_init); | |
1611 | ||
abb81c4f HX |
1612 | void xfrm_state_walk_done(struct xfrm_state_walk *walk) |
1613 | { | |
12a169e7 | 1614 | if (list_empty(&walk->all)) |
5c182458 | 1615 | return; |
5c182458 | 1616 | |
12a169e7 HX |
1617 | spin_lock_bh(&xfrm_state_lock); |
1618 | list_del(&walk->all); | |
7d0b591c | 1619 | spin_unlock_bh(&xfrm_state_lock); |
abb81c4f HX |
1620 | } |
1621 | EXPORT_SYMBOL(xfrm_state_walk_done); | |
1622 | ||
f8cd5488 JHS |
1623 | static void xfrm_replay_timer_handler(unsigned long data) |
1624 | { | |
1625 | struct xfrm_state *x = (struct xfrm_state*)data; | |
1626 | ||
1627 | spin_lock(&x->lock); | |
1628 | ||
2717096a | 1629 | if (x->km.state == XFRM_STATE_VALID) { |
a6483b79 | 1630 | if (xfrm_aevent_is_on(xs_net(x))) |
9fdc4883 | 1631 | x->repl->notify(x, XFRM_REPLAY_TIMEOUT); |
2717096a JHS |
1632 | else |
1633 | x->xflags |= XFRM_TIME_DEFER; | |
1634 | } | |
f8cd5488 JHS |
1635 | |
1636 | spin_unlock(&x->lock); | |
1637 | } | |
1638 | ||
df01812e | 1639 | static LIST_HEAD(xfrm_km_list); |
1da177e4 LT |
1640 | static DEFINE_RWLOCK(xfrm_km_lock); |
1641 | ||
214e005b | 1642 | void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
1da177e4 LT |
1643 | { |
1644 | struct xfrm_mgr *km; | |
1645 | ||
26b15dad JHS |
1646 | read_lock(&xfrm_km_lock); |
1647 | list_for_each_entry(km, &xfrm_km_list, list) | |
1648 | if (km->notify_policy) | |
1649 | km->notify_policy(xp, dir, c); | |
1650 | read_unlock(&xfrm_km_lock); | |
1651 | } | |
1da177e4 | 1652 | |
214e005b | 1653 | void km_state_notify(struct xfrm_state *x, const struct km_event *c) |
26b15dad JHS |
1654 | { |
1655 | struct xfrm_mgr *km; | |
1da177e4 LT |
1656 | read_lock(&xfrm_km_lock); |
1657 | list_for_each_entry(km, &xfrm_km_list, list) | |
26b15dad JHS |
1658 | if (km->notify) |
1659 | km->notify(x, c); | |
1da177e4 | 1660 | read_unlock(&xfrm_km_lock); |
26b15dad JHS |
1661 | } |
1662 | ||
1663 | EXPORT_SYMBOL(km_policy_notify); | |
1664 | EXPORT_SYMBOL(km_state_notify); | |
1665 | ||
53bc6b4d | 1666 | void km_state_expired(struct xfrm_state *x, int hard, u32 pid) |
26b15dad | 1667 | { |
98806f75 | 1668 | struct net *net = xs_net(x); |
26b15dad JHS |
1669 | struct km_event c; |
1670 | ||
bf08867f | 1671 | c.data.hard = hard; |
53bc6b4d | 1672 | c.pid = pid; |
f60f6b8f | 1673 | c.event = XFRM_MSG_EXPIRE; |
26b15dad | 1674 | km_state_notify(x, &c); |
1da177e4 LT |
1675 | |
1676 | if (hard) | |
98806f75 | 1677 | wake_up(&net->xfrm.km_waitq); |
1da177e4 LT |
1678 | } |
1679 | ||
53bc6b4d | 1680 | EXPORT_SYMBOL(km_state_expired); |
26b15dad JHS |
1681 | /* |
1682 | * We send to all registered managers regardless of failure | |
1683 | * We are happy with one success | |
1684 | */ | |
980ebd25 | 1685 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol) |
1da177e4 | 1686 | { |
26b15dad | 1687 | int err = -EINVAL, acqret; |
1da177e4 LT |
1688 | struct xfrm_mgr *km; |
1689 | ||
1690 | read_lock(&xfrm_km_lock); | |
1691 | list_for_each_entry(km, &xfrm_km_list, list) { | |
26b15dad JHS |
1692 | acqret = km->acquire(x, t, pol, XFRM_POLICY_OUT); |
1693 | if (!acqret) | |
1694 | err = acqret; | |
1da177e4 LT |
1695 | } |
1696 | read_unlock(&xfrm_km_lock); | |
1697 | return err; | |
1698 | } | |
980ebd25 | 1699 | EXPORT_SYMBOL(km_query); |
1da177e4 | 1700 | |
5d36b180 | 1701 | int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) |
1da177e4 LT |
1702 | { |
1703 | int err = -EINVAL; | |
1704 | struct xfrm_mgr *km; | |
1705 | ||
1706 | read_lock(&xfrm_km_lock); | |
1707 | list_for_each_entry(km, &xfrm_km_list, list) { | |
1708 | if (km->new_mapping) | |
1709 | err = km->new_mapping(x, ipaddr, sport); | |
1710 | if (!err) | |
1711 | break; | |
1712 | } | |
1713 | read_unlock(&xfrm_km_lock); | |
1714 | return err; | |
1715 | } | |
1716 | EXPORT_SYMBOL(km_new_mapping); | |
1717 | ||
6c5c8ca7 | 1718 | void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid) |
1da177e4 | 1719 | { |
98806f75 | 1720 | struct net *net = xp_net(pol); |
26b15dad | 1721 | struct km_event c; |
1da177e4 | 1722 | |
bf08867f | 1723 | c.data.hard = hard; |
6c5c8ca7 | 1724 | c.pid = pid; |
f60f6b8f | 1725 | c.event = XFRM_MSG_POLEXPIRE; |
26b15dad | 1726 | km_policy_notify(pol, dir, &c); |
1da177e4 LT |
1727 | |
1728 | if (hard) | |
98806f75 | 1729 | wake_up(&net->xfrm.km_waitq); |
1da177e4 | 1730 | } |
a70fcb0b | 1731 | EXPORT_SYMBOL(km_policy_expired); |
1da177e4 | 1732 | |
2d60abc2 | 1733 | #ifdef CONFIG_XFRM_MIGRATE |
183cad12 DM |
1734 | int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1735 | const struct xfrm_migrate *m, int num_migrate, | |
1736 | const struct xfrm_kmaddress *k) | |
80c9abaa SS |
1737 | { |
1738 | int err = -EINVAL; | |
1739 | int ret; | |
1740 | struct xfrm_mgr *km; | |
1741 | ||
1742 | read_lock(&xfrm_km_lock); | |
1743 | list_for_each_entry(km, &xfrm_km_list, list) { | |
1744 | if (km->migrate) { | |
13c1d189 | 1745 | ret = km->migrate(sel, dir, type, m, num_migrate, k); |
80c9abaa SS |
1746 | if (!ret) |
1747 | err = ret; | |
1748 | } | |
1749 | } | |
1750 | read_unlock(&xfrm_km_lock); | |
1751 | return err; | |
1752 | } | |
1753 | EXPORT_SYMBOL(km_migrate); | |
2d60abc2 | 1754 | #endif |
80c9abaa | 1755 | |
db983c11 | 1756 | int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr) |
97a64b45 MN |
1757 | { |
1758 | int err = -EINVAL; | |
1759 | int ret; | |
1760 | struct xfrm_mgr *km; | |
1761 | ||
1762 | read_lock(&xfrm_km_lock); | |
1763 | list_for_each_entry(km, &xfrm_km_list, list) { | |
1764 | if (km->report) { | |
db983c11 | 1765 | ret = km->report(net, proto, sel, addr); |
97a64b45 MN |
1766 | if (!ret) |
1767 | err = ret; | |
1768 | } | |
1769 | } | |
1770 | read_unlock(&xfrm_km_lock); | |
1771 | return err; | |
1772 | } | |
1773 | EXPORT_SYMBOL(km_report); | |
1774 | ||
1da177e4 LT |
1775 | int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) |
1776 | { | |
1777 | int err; | |
1778 | u8 *data; | |
1779 | struct xfrm_mgr *km; | |
1780 | struct xfrm_policy *pol = NULL; | |
1781 | ||
1782 | if (optlen <= 0 || optlen > PAGE_SIZE) | |
1783 | return -EMSGSIZE; | |
1784 | ||
1785 | data = kmalloc(optlen, GFP_KERNEL); | |
1786 | if (!data) | |
1787 | return -ENOMEM; | |
1788 | ||
1789 | err = -EFAULT; | |
1790 | if (copy_from_user(data, optval, optlen)) | |
1791 | goto out; | |
1792 | ||
1793 | err = -EINVAL; | |
1794 | read_lock(&xfrm_km_lock); | |
1795 | list_for_each_entry(km, &xfrm_km_list, list) { | |
cb969f07 | 1796 | pol = km->compile_policy(sk, optname, data, |
1da177e4 LT |
1797 | optlen, &err); |
1798 | if (err >= 0) | |
1799 | break; | |
1800 | } | |
1801 | read_unlock(&xfrm_km_lock); | |
1802 | ||
1803 | if (err >= 0) { | |
1804 | xfrm_sk_policy_insert(sk, err, pol); | |
1805 | xfrm_pol_put(pol); | |
1806 | err = 0; | |
1807 | } | |
1808 | ||
1809 | out: | |
1810 | kfree(data); | |
1811 | return err; | |
1812 | } | |
1813 | EXPORT_SYMBOL(xfrm_user_policy); | |
1814 | ||
1815 | int xfrm_register_km(struct xfrm_mgr *km) | |
1816 | { | |
1817 | write_lock_bh(&xfrm_km_lock); | |
1818 | list_add_tail(&km->list, &xfrm_km_list); | |
1819 | write_unlock_bh(&xfrm_km_lock); | |
1820 | return 0; | |
1821 | } | |
1822 | EXPORT_SYMBOL(xfrm_register_km); | |
1823 | ||
1824 | int xfrm_unregister_km(struct xfrm_mgr *km) | |
1825 | { | |
1826 | write_lock_bh(&xfrm_km_lock); | |
1827 | list_del(&km->list); | |
1828 | write_unlock_bh(&xfrm_km_lock); | |
1829 | return 0; | |
1830 | } | |
1831 | EXPORT_SYMBOL(xfrm_unregister_km); | |
1832 | ||
1833 | int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo) | |
1834 | { | |
1835 | int err = 0; | |
1836 | if (unlikely(afinfo == NULL)) | |
1837 | return -EINVAL; | |
1838 | if (unlikely(afinfo->family >= NPROTO)) | |
1839 | return -EAFNOSUPPORT; | |
f3111502 | 1840 | write_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1841 | if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL)) |
1842 | err = -ENOBUFS; | |
edcd5821 | 1843 | else |
1da177e4 | 1844 | xfrm_state_afinfo[afinfo->family] = afinfo; |
f3111502 | 1845 | write_unlock_bh(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1846 | return err; |
1847 | } | |
1848 | EXPORT_SYMBOL(xfrm_state_register_afinfo); | |
1849 | ||
1850 | int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo) | |
1851 | { | |
1852 | int err = 0; | |
1853 | if (unlikely(afinfo == NULL)) | |
1854 | return -EINVAL; | |
1855 | if (unlikely(afinfo->family >= NPROTO)) | |
1856 | return -EAFNOSUPPORT; | |
f3111502 | 1857 | write_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1858 | if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) { |
1859 | if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo)) | |
1860 | err = -EINVAL; | |
edcd5821 | 1861 | else |
1da177e4 | 1862 | xfrm_state_afinfo[afinfo->family] = NULL; |
1da177e4 | 1863 | } |
f3111502 | 1864 | write_unlock_bh(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1865 | return err; |
1866 | } | |
1867 | EXPORT_SYMBOL(xfrm_state_unregister_afinfo); | |
1868 | ||
17c2a42a | 1869 | static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family) |
1da177e4 LT |
1870 | { |
1871 | struct xfrm_state_afinfo *afinfo; | |
1872 | if (unlikely(family >= NPROTO)) | |
1873 | return NULL; | |
1874 | read_lock(&xfrm_state_afinfo_lock); | |
1875 | afinfo = xfrm_state_afinfo[family]; | |
546be240 HX |
1876 | if (unlikely(!afinfo)) |
1877 | read_unlock(&xfrm_state_afinfo_lock); | |
1da177e4 LT |
1878 | return afinfo; |
1879 | } | |
1880 | ||
17c2a42a | 1881 | static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo) |
9a429c49 | 1882 | __releases(xfrm_state_afinfo_lock) |
1da177e4 | 1883 | { |
546be240 | 1884 | read_unlock(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1885 | } |
1886 | ||
1887 | /* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */ | |
1888 | void xfrm_state_delete_tunnel(struct xfrm_state *x) | |
1889 | { | |
1890 | if (x->tunnel) { | |
1891 | struct xfrm_state *t = x->tunnel; | |
1892 | ||
1893 | if (atomic_read(&t->tunnel_users) == 2) | |
1894 | xfrm_state_delete(t); | |
1895 | atomic_dec(&t->tunnel_users); | |
1896 | xfrm_state_put(t); | |
1897 | x->tunnel = NULL; | |
1898 | } | |
1899 | } | |
1900 | EXPORT_SYMBOL(xfrm_state_delete_tunnel); | |
1901 | ||
1902 | int xfrm_state_mtu(struct xfrm_state *x, int mtu) | |
1903 | { | |
c5c25238 | 1904 | int res; |
1da177e4 | 1905 | |
c5c25238 PM |
1906 | spin_lock_bh(&x->lock); |
1907 | if (x->km.state == XFRM_STATE_VALID && | |
1908 | x->type && x->type->get_mtu) | |
1909 | res = x->type->get_mtu(x, mtu); | |
1910 | else | |
28121617 | 1911 | res = mtu - x->props.header_len; |
c5c25238 | 1912 | spin_unlock_bh(&x->lock); |
1da177e4 LT |
1913 | return res; |
1914 | } | |
1915 | ||
a454f0cc | 1916 | int __xfrm_init_state(struct xfrm_state *x, bool init_replay) |
72cb6962 | 1917 | { |
d094cd83 | 1918 | struct xfrm_state_afinfo *afinfo; |
df9dcb45 | 1919 | struct xfrm_mode *inner_mode; |
d094cd83 | 1920 | int family = x->props.family; |
72cb6962 HX |
1921 | int err; |
1922 | ||
d094cd83 HX |
1923 | err = -EAFNOSUPPORT; |
1924 | afinfo = xfrm_state_get_afinfo(family); | |
1925 | if (!afinfo) | |
1926 | goto error; | |
1927 | ||
1928 | err = 0; | |
1929 | if (afinfo->init_flags) | |
1930 | err = afinfo->init_flags(x); | |
1931 | ||
1932 | xfrm_state_put_afinfo(afinfo); | |
1933 | ||
1934 | if (err) | |
1935 | goto error; | |
1936 | ||
1937 | err = -EPROTONOSUPPORT; | |
13996378 | 1938 | |
df9dcb45 KM |
1939 | if (x->sel.family != AF_UNSPEC) { |
1940 | inner_mode = xfrm_get_mode(x->props.mode, x->sel.family); | |
1941 | if (inner_mode == NULL) | |
1942 | goto error; | |
1943 | ||
1944 | if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) && | |
1945 | family != x->sel.family) { | |
1946 | xfrm_put_mode(inner_mode); | |
1947 | goto error; | |
1948 | } | |
1949 | ||
1950 | x->inner_mode = inner_mode; | |
1951 | } else { | |
1952 | struct xfrm_mode *inner_mode_iaf; | |
d81d2285 | 1953 | int iafamily = AF_INET; |
df9dcb45 | 1954 | |
d81d2285 | 1955 | inner_mode = xfrm_get_mode(x->props.mode, x->props.family); |
df9dcb45 KM |
1956 | if (inner_mode == NULL) |
1957 | goto error; | |
1958 | ||
1959 | if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) { | |
1960 | xfrm_put_mode(inner_mode); | |
1961 | goto error; | |
1962 | } | |
d81d2285 | 1963 | x->inner_mode = inner_mode; |
df9dcb45 | 1964 | |
d81d2285 MW |
1965 | if (x->props.family == AF_INET) |
1966 | iafamily = AF_INET6; | |
df9dcb45 | 1967 | |
d81d2285 MW |
1968 | inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily); |
1969 | if (inner_mode_iaf) { | |
1970 | if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL) | |
1971 | x->inner_mode_iaf = inner_mode_iaf; | |
1972 | else | |
1973 | xfrm_put_mode(inner_mode_iaf); | |
df9dcb45 KM |
1974 | } |
1975 | } | |
13996378 | 1976 | |
d094cd83 | 1977 | x->type = xfrm_get_type(x->id.proto, family); |
72cb6962 HX |
1978 | if (x->type == NULL) |
1979 | goto error; | |
1980 | ||
1981 | err = x->type->init_state(x); | |
1982 | if (err) | |
1983 | goto error; | |
1984 | ||
13996378 HX |
1985 | x->outer_mode = xfrm_get_mode(x->props.mode, family); |
1986 | if (x->outer_mode == NULL) | |
b59f45d0 HX |
1987 | goto error; |
1988 | ||
a454f0cc WY |
1989 | if (init_replay) { |
1990 | err = xfrm_init_replay(x); | |
1991 | if (err) | |
1992 | goto error; | |
1993 | } | |
1994 | ||
72cb6962 HX |
1995 | x->km.state = XFRM_STATE_VALID; |
1996 | ||
1997 | error: | |
1998 | return err; | |
1999 | } | |
2000 | ||
a454f0cc WY |
2001 | EXPORT_SYMBOL(__xfrm_init_state); |
2002 | ||
2003 | int xfrm_init_state(struct xfrm_state *x) | |
2004 | { | |
2005 | return __xfrm_init_state(x, true); | |
2006 | } | |
2007 | ||
72cb6962 | 2008 | EXPORT_SYMBOL(xfrm_init_state); |
a716c119 | 2009 | |
d62ddc21 | 2010 | int __net_init xfrm_state_init(struct net *net) |
1da177e4 | 2011 | { |
f034b5d4 DM |
2012 | unsigned int sz; |
2013 | ||
9d4139c7 AD |
2014 | INIT_LIST_HEAD(&net->xfrm.state_all); |
2015 | ||
f034b5d4 DM |
2016 | sz = sizeof(struct hlist_head) * 8; |
2017 | ||
73d189dc AD |
2018 | net->xfrm.state_bydst = xfrm_hash_alloc(sz); |
2019 | if (!net->xfrm.state_bydst) | |
2020 | goto out_bydst; | |
d320bbb3 AD |
2021 | net->xfrm.state_bysrc = xfrm_hash_alloc(sz); |
2022 | if (!net->xfrm.state_bysrc) | |
2023 | goto out_bysrc; | |
b754a4fd AD |
2024 | net->xfrm.state_byspi = xfrm_hash_alloc(sz); |
2025 | if (!net->xfrm.state_byspi) | |
2026 | goto out_byspi; | |
529983ec | 2027 | net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1); |
1da177e4 | 2028 | |
0bf7c5b0 | 2029 | net->xfrm.state_num = 0; |
63082733 | 2030 | INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize); |
b8a0ae20 | 2031 | INIT_HLIST_HEAD(&net->xfrm.state_gc_list); |
c7837144 | 2032 | INIT_WORK(&net->xfrm.state_gc_work, xfrm_state_gc_task); |
50a30657 | 2033 | init_waitqueue_head(&net->xfrm.km_waitq); |
d62ddc21 | 2034 | return 0; |
73d189dc | 2035 | |
b754a4fd AD |
2036 | out_byspi: |
2037 | xfrm_hash_free(net->xfrm.state_bysrc, sz); | |
d320bbb3 AD |
2038 | out_bysrc: |
2039 | xfrm_hash_free(net->xfrm.state_bydst, sz); | |
73d189dc AD |
2040 | out_bydst: |
2041 | return -ENOMEM; | |
d62ddc21 AD |
2042 | } |
2043 | ||
2044 | void xfrm_state_fini(struct net *net) | |
2045 | { | |
7c2776ee | 2046 | struct xfrm_audit audit_info; |
73d189dc AD |
2047 | unsigned int sz; |
2048 | ||
7c2776ee AD |
2049 | flush_work(&net->xfrm.state_hash_work); |
2050 | audit_info.loginuid = -1; | |
2051 | audit_info.sessionid = -1; | |
2052 | audit_info.secid = 0; | |
2053 | xfrm_state_flush(net, IPSEC_PROTO_ANY, &audit_info); | |
2054 | flush_work(&net->xfrm.state_gc_work); | |
2055 | ||
9d4139c7 | 2056 | WARN_ON(!list_empty(&net->xfrm.state_all)); |
73d189dc | 2057 | |
529983ec | 2058 | sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head); |
b754a4fd AD |
2059 | WARN_ON(!hlist_empty(net->xfrm.state_byspi)); |
2060 | xfrm_hash_free(net->xfrm.state_byspi, sz); | |
d320bbb3 AD |
2061 | WARN_ON(!hlist_empty(net->xfrm.state_bysrc)); |
2062 | xfrm_hash_free(net->xfrm.state_bysrc, sz); | |
73d189dc AD |
2063 | WARN_ON(!hlist_empty(net->xfrm.state_bydst)); |
2064 | xfrm_hash_free(net->xfrm.state_bydst, sz); | |
1da177e4 LT |
2065 | } |
2066 | ||
ab5f5e8b | 2067 | #ifdef CONFIG_AUDITSYSCALL |
cf35f43e IJ |
2068 | static void xfrm_audit_helper_sainfo(struct xfrm_state *x, |
2069 | struct audit_buffer *audit_buf) | |
ab5f5e8b | 2070 | { |
68277acc PM |
2071 | struct xfrm_sec_ctx *ctx = x->security; |
2072 | u32 spi = ntohl(x->id.spi); | |
2073 | ||
2074 | if (ctx) | |
ab5f5e8b | 2075 | audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s", |
68277acc | 2076 | ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str); |
ab5f5e8b JL |
2077 | |
2078 | switch(x->props.family) { | |
2079 | case AF_INET: | |
21454aaa HH |
2080 | audit_log_format(audit_buf, " src=%pI4 dst=%pI4", |
2081 | &x->props.saddr.a4, &x->id.daddr.a4); | |
ab5f5e8b JL |
2082 | break; |
2083 | case AF_INET6: | |
5b095d98 | 2084 | audit_log_format(audit_buf, " src=%pI6 dst=%pI6", |
fdb46ee7 | 2085 | x->props.saddr.a6, x->id.daddr.a6); |
ab5f5e8b JL |
2086 | break; |
2087 | } | |
68277acc PM |
2088 | |
2089 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
ab5f5e8b JL |
2090 | } |
2091 | ||
cf35f43e IJ |
2092 | static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family, |
2093 | struct audit_buffer *audit_buf) | |
afeb14b4 | 2094 | { |
b71d1d42 ED |
2095 | const struct iphdr *iph4; |
2096 | const struct ipv6hdr *iph6; | |
afeb14b4 PM |
2097 | |
2098 | switch (family) { | |
2099 | case AF_INET: | |
2100 | iph4 = ip_hdr(skb); | |
21454aaa HH |
2101 | audit_log_format(audit_buf, " src=%pI4 dst=%pI4", |
2102 | &iph4->saddr, &iph4->daddr); | |
afeb14b4 PM |
2103 | break; |
2104 | case AF_INET6: | |
2105 | iph6 = ipv6_hdr(skb); | |
2106 | audit_log_format(audit_buf, | |
5b095d98 | 2107 | " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x", |
fdb46ee7 | 2108 | &iph6->saddr,&iph6->daddr, |
afeb14b4 PM |
2109 | iph6->flow_lbl[0] & 0x0f, |
2110 | iph6->flow_lbl[1], | |
2111 | iph6->flow_lbl[2]); | |
2112 | break; | |
2113 | } | |
2114 | } | |
2115 | ||
68277acc | 2116 | void xfrm_audit_state_add(struct xfrm_state *x, int result, |
2532386f | 2117 | uid_t auid, u32 sessionid, u32 secid) |
ab5f5e8b JL |
2118 | { |
2119 | struct audit_buffer *audit_buf; | |
ab5f5e8b | 2120 | |
afeb14b4 | 2121 | audit_buf = xfrm_audit_start("SAD-add"); |
ab5f5e8b JL |
2122 | if (audit_buf == NULL) |
2123 | return; | |
2532386f | 2124 | xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf); |
afeb14b4 PM |
2125 | xfrm_audit_helper_sainfo(x, audit_buf); |
2126 | audit_log_format(audit_buf, " res=%u", result); | |
ab5f5e8b JL |
2127 | audit_log_end(audit_buf); |
2128 | } | |
2129 | EXPORT_SYMBOL_GPL(xfrm_audit_state_add); | |
2130 | ||
68277acc | 2131 | void xfrm_audit_state_delete(struct xfrm_state *x, int result, |
2532386f | 2132 | uid_t auid, u32 sessionid, u32 secid) |
ab5f5e8b JL |
2133 | { |
2134 | struct audit_buffer *audit_buf; | |
ab5f5e8b | 2135 | |
afeb14b4 | 2136 | audit_buf = xfrm_audit_start("SAD-delete"); |
ab5f5e8b JL |
2137 | if (audit_buf == NULL) |
2138 | return; | |
2532386f | 2139 | xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf); |
afeb14b4 PM |
2140 | xfrm_audit_helper_sainfo(x, audit_buf); |
2141 | audit_log_format(audit_buf, " res=%u", result); | |
ab5f5e8b JL |
2142 | audit_log_end(audit_buf); |
2143 | } | |
2144 | EXPORT_SYMBOL_GPL(xfrm_audit_state_delete); | |
afeb14b4 PM |
2145 | |
2146 | void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
2147 | struct sk_buff *skb) | |
2148 | { | |
2149 | struct audit_buffer *audit_buf; | |
2150 | u32 spi; | |
2151 | ||
2152 | audit_buf = xfrm_audit_start("SA-replay-overflow"); | |
2153 | if (audit_buf == NULL) | |
2154 | return; | |
2155 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2156 | /* don't record the sequence number because it's inherent in this kind | |
2157 | * of audit message */ | |
2158 | spi = ntohl(x->id.spi); | |
2159 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
2160 | audit_log_end(audit_buf); | |
2161 | } | |
2162 | EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow); | |
2163 | ||
9fdc4883 | 2164 | void xfrm_audit_state_replay(struct xfrm_state *x, |
afeb14b4 PM |
2165 | struct sk_buff *skb, __be32 net_seq) |
2166 | { | |
2167 | struct audit_buffer *audit_buf; | |
2168 | u32 spi; | |
2169 | ||
2170 | audit_buf = xfrm_audit_start("SA-replayed-pkt"); | |
2171 | if (audit_buf == NULL) | |
2172 | return; | |
2173 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2174 | spi = ntohl(x->id.spi); | |
2175 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2176 | spi, spi, ntohl(net_seq)); | |
2177 | audit_log_end(audit_buf); | |
2178 | } | |
9fdc4883 | 2179 | EXPORT_SYMBOL_GPL(xfrm_audit_state_replay); |
afeb14b4 PM |
2180 | |
2181 | void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family) | |
2182 | { | |
2183 | struct audit_buffer *audit_buf; | |
2184 | ||
2185 | audit_buf = xfrm_audit_start("SA-notfound"); | |
2186 | if (audit_buf == NULL) | |
2187 | return; | |
2188 | xfrm_audit_helper_pktinfo(skb, family, audit_buf); | |
2189 | audit_log_end(audit_buf); | |
2190 | } | |
2191 | EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple); | |
2192 | ||
2193 | void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
2194 | __be32 net_spi, __be32 net_seq) | |
2195 | { | |
2196 | struct audit_buffer *audit_buf; | |
2197 | u32 spi; | |
2198 | ||
2199 | audit_buf = xfrm_audit_start("SA-notfound"); | |
2200 | if (audit_buf == NULL) | |
2201 | return; | |
2202 | xfrm_audit_helper_pktinfo(skb, family, audit_buf); | |
2203 | spi = ntohl(net_spi); | |
2204 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2205 | spi, spi, ntohl(net_seq)); | |
2206 | audit_log_end(audit_buf); | |
2207 | } | |
2208 | EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound); | |
2209 | ||
2210 | void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
2211 | struct sk_buff *skb, u8 proto) | |
2212 | { | |
2213 | struct audit_buffer *audit_buf; | |
2214 | __be32 net_spi; | |
2215 | __be32 net_seq; | |
2216 | ||
2217 | audit_buf = xfrm_audit_start("SA-icv-failure"); | |
2218 | if (audit_buf == NULL) | |
2219 | return; | |
2220 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2221 | if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) { | |
2222 | u32 spi = ntohl(net_spi); | |
2223 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2224 | spi, spi, ntohl(net_seq)); | |
2225 | } | |
2226 | audit_log_end(audit_buf); | |
2227 | } | |
2228 | EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail); | |
ab5f5e8b | 2229 | #endif /* CONFIG_AUDITSYSCALL */ |