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 | |
64d0cd00 | 42 | static inline unsigned int xfrm_dst_hash(struct net *net, |
2ab38503 DM |
43 | const xfrm_address_t *daddr, |
44 | const xfrm_address_t *saddr, | |
c1969f29 | 45 | u32 reqid, |
a624c108 | 46 | unsigned short family) |
f034b5d4 | 47 | { |
64d0cd00 | 48 | return __xfrm_dst_hash(daddr, saddr, reqid, family, net->xfrm.state_hmask); |
f034b5d4 DM |
49 | } |
50 | ||
64d0cd00 | 51 | static inline unsigned int xfrm_src_hash(struct net *net, |
2ab38503 DM |
52 | const xfrm_address_t *daddr, |
53 | const xfrm_address_t *saddr, | |
44e36b42 | 54 | unsigned short family) |
f034b5d4 | 55 | { |
64d0cd00 | 56 | return __xfrm_src_hash(daddr, saddr, family, net->xfrm.state_hmask); |
f034b5d4 DM |
57 | } |
58 | ||
f034b5d4 | 59 | static inline unsigned int |
2ab38503 DM |
60 | xfrm_spi_hash(struct net *net, const xfrm_address_t *daddr, |
61 | __be32 spi, u8 proto, unsigned short family) | |
f034b5d4 | 62 | { |
64d0cd00 | 63 | return __xfrm_spi_hash(daddr, spi, proto, family, net->xfrm.state_hmask); |
f034b5d4 DM |
64 | } |
65 | ||
f034b5d4 DM |
66 | static void xfrm_hash_transfer(struct hlist_head *list, |
67 | struct hlist_head *ndsttable, | |
68 | struct hlist_head *nsrctable, | |
69 | struct hlist_head *nspitable, | |
70 | unsigned int nhashmask) | |
71 | { | |
b67bfe0d | 72 | struct hlist_node *tmp; |
f034b5d4 DM |
73 | struct xfrm_state *x; |
74 | ||
b67bfe0d | 75 | hlist_for_each_entry_safe(x, tmp, list, bydst) { |
f034b5d4 DM |
76 | unsigned int h; |
77 | ||
c1969f29 DM |
78 | h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr, |
79 | x->props.reqid, x->props.family, | |
80 | nhashmask); | |
f034b5d4 DM |
81 | hlist_add_head(&x->bydst, ndsttable+h); |
82 | ||
667bbcb6 MN |
83 | h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr, |
84 | x->props.family, | |
f034b5d4 DM |
85 | nhashmask); |
86 | hlist_add_head(&x->bysrc, nsrctable+h); | |
87 | ||
7b4dc360 MN |
88 | if (x->id.spi) { |
89 | h = __xfrm_spi_hash(&x->id.daddr, x->id.spi, | |
90 | x->id.proto, x->props.family, | |
91 | nhashmask); | |
92 | hlist_add_head(&x->byspi, nspitable+h); | |
93 | } | |
f034b5d4 DM |
94 | } |
95 | } | |
96 | ||
63082733 | 97 | static unsigned long xfrm_hash_new_size(unsigned int state_hmask) |
f034b5d4 | 98 | { |
63082733 | 99 | return ((state_hmask + 1) << 1) * sizeof(struct hlist_head); |
f034b5d4 DM |
100 | } |
101 | ||
102 | static DEFINE_MUTEX(hash_resize_mutex); | |
103 | ||
63082733 | 104 | static void xfrm_hash_resize(struct work_struct *work) |
f034b5d4 | 105 | { |
63082733 | 106 | struct net *net = container_of(work, struct net, xfrm.state_hash_work); |
f034b5d4 DM |
107 | struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi; |
108 | unsigned long nsize, osize; | |
109 | unsigned int nhashmask, ohashmask; | |
110 | int i; | |
111 | ||
112 | mutex_lock(&hash_resize_mutex); | |
113 | ||
63082733 | 114 | nsize = xfrm_hash_new_size(net->xfrm.state_hmask); |
44e36b42 | 115 | ndst = xfrm_hash_alloc(nsize); |
f034b5d4 DM |
116 | if (!ndst) |
117 | goto out_unlock; | |
44e36b42 | 118 | nsrc = xfrm_hash_alloc(nsize); |
f034b5d4 | 119 | if (!nsrc) { |
44e36b42 | 120 | xfrm_hash_free(ndst, nsize); |
f034b5d4 DM |
121 | goto out_unlock; |
122 | } | |
44e36b42 | 123 | nspi = xfrm_hash_alloc(nsize); |
f034b5d4 | 124 | if (!nspi) { |
44e36b42 DM |
125 | xfrm_hash_free(ndst, nsize); |
126 | xfrm_hash_free(nsrc, nsize); | |
f034b5d4 DM |
127 | goto out_unlock; |
128 | } | |
129 | ||
130 | spin_lock_bh(&xfrm_state_lock); | |
131 | ||
132 | nhashmask = (nsize / sizeof(struct hlist_head)) - 1U; | |
63082733 AD |
133 | for (i = net->xfrm.state_hmask; i >= 0; i--) |
134 | xfrm_hash_transfer(net->xfrm.state_bydst+i, ndst, nsrc, nspi, | |
f034b5d4 DM |
135 | nhashmask); |
136 | ||
63082733 AD |
137 | odst = net->xfrm.state_bydst; |
138 | osrc = net->xfrm.state_bysrc; | |
139 | ospi = net->xfrm.state_byspi; | |
140 | ohashmask = net->xfrm.state_hmask; | |
f034b5d4 | 141 | |
63082733 AD |
142 | net->xfrm.state_bydst = ndst; |
143 | net->xfrm.state_bysrc = nsrc; | |
144 | net->xfrm.state_byspi = nspi; | |
145 | net->xfrm.state_hmask = nhashmask; | |
f034b5d4 DM |
146 | |
147 | spin_unlock_bh(&xfrm_state_lock); | |
148 | ||
149 | osize = (ohashmask + 1) * sizeof(struct hlist_head); | |
44e36b42 DM |
150 | xfrm_hash_free(odst, osize); |
151 | xfrm_hash_free(osrc, osize); | |
152 | xfrm_hash_free(ospi, osize); | |
f034b5d4 DM |
153 | |
154 | out_unlock: | |
155 | mutex_unlock(&hash_resize_mutex); | |
156 | } | |
157 | ||
44abdc30 CW |
158 | static DEFINE_SPINLOCK(xfrm_state_afinfo_lock); |
159 | static struct xfrm_state_afinfo __rcu *xfrm_state_afinfo[NPROTO]; | |
1da177e4 | 160 | |
1da177e4 LT |
161 | static DEFINE_SPINLOCK(xfrm_state_gc_lock); |
162 | ||
53bc6b4d | 163 | int __xfrm_state_delete(struct xfrm_state *x); |
1da177e4 | 164 | |
980ebd25 | 165 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); |
15e47304 | 166 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid); |
1da177e4 | 167 | |
7a9885b9 | 168 | static DEFINE_SPINLOCK(xfrm_type_lock); |
533cb5b0 | 169 | int xfrm_register_type(const struct xfrm_type *type, unsigned short family) |
aa5d62cc | 170 | { |
7a9885b9 | 171 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); |
533cb5b0 | 172 | const struct xfrm_type **typemap; |
aa5d62cc HX |
173 | int err = 0; |
174 | ||
175 | if (unlikely(afinfo == NULL)) | |
176 | return -EAFNOSUPPORT; | |
177 | typemap = afinfo->type_map; | |
7a9885b9 | 178 | spin_lock_bh(&xfrm_type_lock); |
aa5d62cc HX |
179 | |
180 | if (likely(typemap[type->proto] == NULL)) | |
181 | typemap[type->proto] = type; | |
182 | else | |
183 | err = -EEXIST; | |
7a9885b9 CW |
184 | spin_unlock_bh(&xfrm_type_lock); |
185 | xfrm_state_put_afinfo(afinfo); | |
aa5d62cc HX |
186 | return err; |
187 | } | |
188 | EXPORT_SYMBOL(xfrm_register_type); | |
189 | ||
533cb5b0 | 190 | int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family) |
aa5d62cc | 191 | { |
7a9885b9 | 192 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); |
533cb5b0 | 193 | const struct xfrm_type **typemap; |
aa5d62cc HX |
194 | int err = 0; |
195 | ||
196 | if (unlikely(afinfo == NULL)) | |
197 | return -EAFNOSUPPORT; | |
198 | typemap = afinfo->type_map; | |
7a9885b9 | 199 | spin_lock_bh(&xfrm_type_lock); |
aa5d62cc HX |
200 | |
201 | if (unlikely(typemap[type->proto] != type)) | |
202 | err = -ENOENT; | |
203 | else | |
204 | typemap[type->proto] = NULL; | |
7a9885b9 CW |
205 | spin_unlock_bh(&xfrm_type_lock); |
206 | xfrm_state_put_afinfo(afinfo); | |
aa5d62cc HX |
207 | return err; |
208 | } | |
209 | EXPORT_SYMBOL(xfrm_unregister_type); | |
210 | ||
533cb5b0 | 211 | static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family) |
aa5d62cc HX |
212 | { |
213 | struct xfrm_state_afinfo *afinfo; | |
533cb5b0 ED |
214 | const struct xfrm_type **typemap; |
215 | const struct xfrm_type *type; | |
aa5d62cc HX |
216 | int modload_attempted = 0; |
217 | ||
218 | retry: | |
219 | afinfo = xfrm_state_get_afinfo(family); | |
220 | if (unlikely(afinfo == NULL)) | |
221 | return NULL; | |
222 | typemap = afinfo->type_map; | |
223 | ||
224 | type = typemap[proto]; | |
225 | if (unlikely(type && !try_module_get(type->owner))) | |
226 | type = NULL; | |
227 | if (!type && !modload_attempted) { | |
228 | xfrm_state_put_afinfo(afinfo); | |
229 | request_module("xfrm-type-%d-%d", family, proto); | |
230 | modload_attempted = 1; | |
231 | goto retry; | |
232 | } | |
233 | ||
234 | xfrm_state_put_afinfo(afinfo); | |
235 | return type; | |
236 | } | |
237 | ||
533cb5b0 | 238 | static void xfrm_put_type(const struct xfrm_type *type) |
aa5d62cc HX |
239 | { |
240 | module_put(type->owner); | |
241 | } | |
242 | ||
7a9885b9 | 243 | static DEFINE_SPINLOCK(xfrm_mode_lock); |
aa5d62cc HX |
244 | int xfrm_register_mode(struct xfrm_mode *mode, int family) |
245 | { | |
246 | struct xfrm_state_afinfo *afinfo; | |
247 | struct xfrm_mode **modemap; | |
248 | int err; | |
249 | ||
250 | if (unlikely(mode->encap >= XFRM_MODE_MAX)) | |
251 | return -EINVAL; | |
252 | ||
7a9885b9 | 253 | afinfo = xfrm_state_get_afinfo(family); |
aa5d62cc HX |
254 | if (unlikely(afinfo == NULL)) |
255 | return -EAFNOSUPPORT; | |
256 | ||
257 | err = -EEXIST; | |
258 | modemap = afinfo->mode_map; | |
7a9885b9 | 259 | spin_lock_bh(&xfrm_mode_lock); |
17c2a42a HX |
260 | if (modemap[mode->encap]) |
261 | goto out; | |
aa5d62cc | 262 | |
17c2a42a HX |
263 | err = -ENOENT; |
264 | if (!try_module_get(afinfo->owner)) | |
265 | goto out; | |
266 | ||
267 | mode->afinfo = afinfo; | |
268 | modemap[mode->encap] = mode; | |
269 | err = 0; | |
270 | ||
271 | out: | |
7a9885b9 CW |
272 | spin_unlock_bh(&xfrm_mode_lock); |
273 | xfrm_state_put_afinfo(afinfo); | |
aa5d62cc HX |
274 | return err; |
275 | } | |
276 | EXPORT_SYMBOL(xfrm_register_mode); | |
277 | ||
278 | int xfrm_unregister_mode(struct xfrm_mode *mode, int family) | |
279 | { | |
280 | struct xfrm_state_afinfo *afinfo; | |
281 | struct xfrm_mode **modemap; | |
282 | int err; | |
283 | ||
284 | if (unlikely(mode->encap >= XFRM_MODE_MAX)) | |
285 | return -EINVAL; | |
286 | ||
7a9885b9 | 287 | afinfo = xfrm_state_get_afinfo(family); |
aa5d62cc HX |
288 | if (unlikely(afinfo == NULL)) |
289 | return -EAFNOSUPPORT; | |
290 | ||
291 | err = -ENOENT; | |
292 | modemap = afinfo->mode_map; | |
7a9885b9 | 293 | spin_lock_bh(&xfrm_mode_lock); |
aa5d62cc HX |
294 | if (likely(modemap[mode->encap] == mode)) { |
295 | modemap[mode->encap] = NULL; | |
17c2a42a | 296 | module_put(mode->afinfo->owner); |
aa5d62cc HX |
297 | err = 0; |
298 | } | |
299 | ||
7a9885b9 CW |
300 | spin_unlock_bh(&xfrm_mode_lock); |
301 | xfrm_state_put_afinfo(afinfo); | |
aa5d62cc HX |
302 | return err; |
303 | } | |
304 | EXPORT_SYMBOL(xfrm_unregister_mode); | |
305 | ||
306 | static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family) | |
307 | { | |
308 | struct xfrm_state_afinfo *afinfo; | |
309 | struct xfrm_mode *mode; | |
310 | int modload_attempted = 0; | |
311 | ||
312 | if (unlikely(encap >= XFRM_MODE_MAX)) | |
313 | return NULL; | |
314 | ||
315 | retry: | |
316 | afinfo = xfrm_state_get_afinfo(family); | |
317 | if (unlikely(afinfo == NULL)) | |
318 | return NULL; | |
319 | ||
320 | mode = afinfo->mode_map[encap]; | |
321 | if (unlikely(mode && !try_module_get(mode->owner))) | |
322 | mode = NULL; | |
323 | if (!mode && !modload_attempted) { | |
324 | xfrm_state_put_afinfo(afinfo); | |
325 | request_module("xfrm-mode-%d-%d", family, encap); | |
326 | modload_attempted = 1; | |
327 | goto retry; | |
328 | } | |
329 | ||
330 | xfrm_state_put_afinfo(afinfo); | |
331 | return mode; | |
332 | } | |
333 | ||
334 | static void xfrm_put_mode(struct xfrm_mode *mode) | |
335 | { | |
336 | module_put(mode->owner); | |
337 | } | |
338 | ||
1da177e4 LT |
339 | static void xfrm_state_gc_destroy(struct xfrm_state *x) |
340 | { | |
9e0d57fd | 341 | tasklet_hrtimer_cancel(&x->mtimer); |
a47f0ce0 | 342 | del_timer_sync(&x->rtimer); |
a51482bd JJ |
343 | kfree(x->aalg); |
344 | kfree(x->ealg); | |
345 | kfree(x->calg); | |
346 | kfree(x->encap); | |
060f02a3 | 347 | kfree(x->coaddr); |
d8647b79 SK |
348 | kfree(x->replay_esn); |
349 | kfree(x->preplay_esn); | |
13996378 HX |
350 | if (x->inner_mode) |
351 | xfrm_put_mode(x->inner_mode); | |
df9dcb45 KM |
352 | if (x->inner_mode_iaf) |
353 | xfrm_put_mode(x->inner_mode_iaf); | |
13996378 HX |
354 | if (x->outer_mode) |
355 | xfrm_put_mode(x->outer_mode); | |
1da177e4 LT |
356 | if (x->type) { |
357 | x->type->destructor(x); | |
358 | xfrm_put_type(x->type); | |
359 | } | |
df71837d | 360 | security_xfrm_state_free(x); |
1da177e4 LT |
361 | kfree(x); |
362 | } | |
363 | ||
c7837144 | 364 | static void xfrm_state_gc_task(struct work_struct *work) |
1da177e4 | 365 | { |
c7837144 | 366 | struct net *net = container_of(work, struct net, xfrm.state_gc_work); |
12a169e7 | 367 | struct xfrm_state *x; |
b67bfe0d | 368 | struct hlist_node *tmp; |
12a169e7 | 369 | struct hlist_head gc_list; |
1da177e4 | 370 | |
1da177e4 | 371 | spin_lock_bh(&xfrm_state_gc_lock); |
c7837144 | 372 | hlist_move_list(&net->xfrm.state_gc_list, &gc_list); |
1da177e4 LT |
373 | spin_unlock_bh(&xfrm_state_gc_lock); |
374 | ||
b67bfe0d | 375 | hlist_for_each_entry_safe(x, tmp, &gc_list, gclist) |
1da177e4 | 376 | xfrm_state_gc_destroy(x); |
8f126e37 | 377 | |
50a30657 | 378 | wake_up(&net->xfrm.km_waitq); |
1da177e4 LT |
379 | } |
380 | ||
381 | static inline unsigned long make_jiffies(long secs) | |
382 | { | |
383 | if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ) | |
384 | return MAX_SCHEDULE_TIMEOUT-1; | |
385 | else | |
a716c119 | 386 | return secs*HZ; |
1da177e4 LT |
387 | } |
388 | ||
9e0d57fd | 389 | static enum hrtimer_restart xfrm_timer_handler(struct hrtimer * me) |
1da177e4 | 390 | { |
9e0d57fd YP |
391 | struct tasklet_hrtimer *thr = container_of(me, struct tasklet_hrtimer, timer); |
392 | struct xfrm_state *x = container_of(thr, struct xfrm_state, mtimer); | |
98806f75 | 393 | struct net *net = xs_net(x); |
9d729f72 | 394 | unsigned long now = get_seconds(); |
1da177e4 LT |
395 | long next = LONG_MAX; |
396 | int warn = 0; | |
161a09e7 | 397 | int err = 0; |
1da177e4 LT |
398 | |
399 | spin_lock(&x->lock); | |
400 | if (x->km.state == XFRM_STATE_DEAD) | |
401 | goto out; | |
402 | if (x->km.state == XFRM_STATE_EXPIRED) | |
403 | goto expired; | |
404 | if (x->lft.hard_add_expires_seconds) { | |
405 | long tmo = x->lft.hard_add_expires_seconds + | |
406 | x->curlft.add_time - now; | |
e3c0d047 FD |
407 | if (tmo <= 0) { |
408 | if (x->xflags & XFRM_SOFT_EXPIRE) { | |
409 | /* enter hard expire without soft expire first?! | |
410 | * setting a new date could trigger this. | |
411 | * workarbound: fix x->curflt.add_time by below: | |
412 | */ | |
413 | x->curlft.add_time = now - x->saved_tmo - 1; | |
414 | tmo = x->lft.hard_add_expires_seconds - x->saved_tmo; | |
415 | } else | |
416 | goto expired; | |
417 | } | |
1da177e4 LT |
418 | if (tmo < next) |
419 | next = tmo; | |
420 | } | |
421 | if (x->lft.hard_use_expires_seconds) { | |
422 | long tmo = x->lft.hard_use_expires_seconds + | |
423 | (x->curlft.use_time ? : now) - now; | |
424 | if (tmo <= 0) | |
425 | goto expired; | |
426 | if (tmo < next) | |
427 | next = tmo; | |
428 | } | |
429 | if (x->km.dying) | |
430 | goto resched; | |
431 | if (x->lft.soft_add_expires_seconds) { | |
432 | long tmo = x->lft.soft_add_expires_seconds + | |
433 | x->curlft.add_time - now; | |
e3c0d047 | 434 | if (tmo <= 0) { |
1da177e4 | 435 | warn = 1; |
e3c0d047 FD |
436 | x->xflags &= ~XFRM_SOFT_EXPIRE; |
437 | } else if (tmo < next) { | |
1da177e4 | 438 | next = tmo; |
e3c0d047 FD |
439 | x->xflags |= XFRM_SOFT_EXPIRE; |
440 | x->saved_tmo = tmo; | |
441 | } | |
1da177e4 LT |
442 | } |
443 | if (x->lft.soft_use_expires_seconds) { | |
444 | long tmo = x->lft.soft_use_expires_seconds + | |
445 | (x->curlft.use_time ? : now) - now; | |
446 | if (tmo <= 0) | |
447 | warn = 1; | |
448 | else if (tmo < next) | |
449 | next = tmo; | |
450 | } | |
451 | ||
4666faab | 452 | x->km.dying = warn; |
1da177e4 | 453 | if (warn) |
53bc6b4d | 454 | km_state_expired(x, 0, 0); |
1da177e4 | 455 | resched: |
9e0d57fd YP |
456 | if (next != LONG_MAX){ |
457 | tasklet_hrtimer_start(&x->mtimer, ktime_set(next, 0), HRTIMER_MODE_REL); | |
458 | } | |
a47f0ce0 | 459 | |
1da177e4 LT |
460 | goto out; |
461 | ||
462 | expired: | |
463 | if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) { | |
464 | x->km.state = XFRM_STATE_EXPIRED; | |
98806f75 | 465 | wake_up(&net->xfrm.km_waitq); |
1da177e4 LT |
466 | next = 2; |
467 | goto resched; | |
468 | } | |
161a09e7 JL |
469 | |
470 | err = __xfrm_state_delete(x); | |
0806ae4c | 471 | if (!err) |
53bc6b4d | 472 | km_state_expired(x, 1, 0); |
1da177e4 | 473 | |
ab5f5e8b | 474 | xfrm_audit_state_delete(x, err ? 0 : 1, |
2532386f EP |
475 | audit_get_loginuid(current), |
476 | audit_get_sessionid(current), 0); | |
161a09e7 | 477 | |
1da177e4 LT |
478 | out: |
479 | spin_unlock(&x->lock); | |
9e0d57fd | 480 | return HRTIMER_NORESTART; |
1da177e4 LT |
481 | } |
482 | ||
0ac84752 DM |
483 | static void xfrm_replay_timer_handler(unsigned long data); |
484 | ||
673c09be | 485 | struct xfrm_state *xfrm_state_alloc(struct net *net) |
1da177e4 LT |
486 | { |
487 | struct xfrm_state *x; | |
488 | ||
0da974f4 | 489 | x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC); |
1da177e4 LT |
490 | |
491 | if (x) { | |
673c09be | 492 | write_pnet(&x->xs_net, net); |
1da177e4 LT |
493 | atomic_set(&x->refcnt, 1); |
494 | atomic_set(&x->tunnel_users, 0); | |
12a169e7 | 495 | INIT_LIST_HEAD(&x->km.all); |
8f126e37 DM |
496 | INIT_HLIST_NODE(&x->bydst); |
497 | INIT_HLIST_NODE(&x->bysrc); | |
498 | INIT_HLIST_NODE(&x->byspi); | |
99565a6c FD |
499 | tasklet_hrtimer_init(&x->mtimer, xfrm_timer_handler, |
500 | CLOCK_BOOTTIME, HRTIMER_MODE_ABS); | |
b24b8a24 PE |
501 | setup_timer(&x->rtimer, xfrm_replay_timer_handler, |
502 | (unsigned long)x); | |
9d729f72 | 503 | x->curlft.add_time = get_seconds(); |
1da177e4 LT |
504 | x->lft.soft_byte_limit = XFRM_INF; |
505 | x->lft.soft_packet_limit = XFRM_INF; | |
506 | x->lft.hard_byte_limit = XFRM_INF; | |
507 | x->lft.hard_packet_limit = XFRM_INF; | |
f8cd5488 JHS |
508 | x->replay_maxage = 0; |
509 | x->replay_maxdiff = 0; | |
df9dcb45 KM |
510 | x->inner_mode = NULL; |
511 | x->inner_mode_iaf = NULL; | |
1da177e4 LT |
512 | spin_lock_init(&x->lock); |
513 | } | |
514 | return x; | |
515 | } | |
516 | EXPORT_SYMBOL(xfrm_state_alloc); | |
517 | ||
518 | void __xfrm_state_destroy(struct xfrm_state *x) | |
519 | { | |
98806f75 AD |
520 | struct net *net = xs_net(x); |
521 | ||
547b792c | 522 | WARN_ON(x->km.state != XFRM_STATE_DEAD); |
1da177e4 LT |
523 | |
524 | spin_lock_bh(&xfrm_state_gc_lock); | |
98806f75 | 525 | hlist_add_head(&x->gclist, &net->xfrm.state_gc_list); |
1da177e4 | 526 | spin_unlock_bh(&xfrm_state_gc_lock); |
98806f75 | 527 | schedule_work(&net->xfrm.state_gc_work); |
1da177e4 LT |
528 | } |
529 | EXPORT_SYMBOL(__xfrm_state_destroy); | |
530 | ||
53bc6b4d | 531 | int __xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 532 | { |
98806f75 | 533 | struct net *net = xs_net(x); |
26b15dad JHS |
534 | int err = -ESRCH; |
535 | ||
1da177e4 LT |
536 | if (x->km.state != XFRM_STATE_DEAD) { |
537 | x->km.state = XFRM_STATE_DEAD; | |
538 | spin_lock(&xfrm_state_lock); | |
12a169e7 | 539 | list_del(&x->km.all); |
8f126e37 | 540 | hlist_del(&x->bydst); |
8f126e37 | 541 | hlist_del(&x->bysrc); |
a47f0ce0 | 542 | if (x->id.spi) |
8f126e37 | 543 | hlist_del(&x->byspi); |
98806f75 | 544 | net->xfrm.state_num--; |
1da177e4 | 545 | spin_unlock(&xfrm_state_lock); |
1da177e4 | 546 | |
1da177e4 LT |
547 | /* All xfrm_state objects are created by xfrm_state_alloc. |
548 | * The xfrm_state_alloc call gives a reference, and that | |
549 | * is what we are dropping here. | |
550 | */ | |
5dba4797 | 551 | xfrm_state_put(x); |
26b15dad | 552 | err = 0; |
1da177e4 | 553 | } |
26b15dad JHS |
554 | |
555 | return err; | |
1da177e4 | 556 | } |
53bc6b4d | 557 | EXPORT_SYMBOL(__xfrm_state_delete); |
1da177e4 | 558 | |
26b15dad | 559 | int xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 560 | { |
26b15dad JHS |
561 | int err; |
562 | ||
1da177e4 | 563 | spin_lock_bh(&x->lock); |
26b15dad | 564 | err = __xfrm_state_delete(x); |
1da177e4 | 565 | spin_unlock_bh(&x->lock); |
26b15dad JHS |
566 | |
567 | return err; | |
1da177e4 LT |
568 | } |
569 | EXPORT_SYMBOL(xfrm_state_delete); | |
570 | ||
4aa2e62c JL |
571 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
572 | static inline int | |
0e602451 | 573 | xfrm_state_flush_secctx_check(struct net *net, u8 proto, struct xfrm_audit *audit_info) |
1da177e4 | 574 | { |
4aa2e62c JL |
575 | int i, err = 0; |
576 | ||
0e602451 | 577 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
4aa2e62c JL |
578 | struct xfrm_state *x; |
579 | ||
b67bfe0d | 580 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
4aa2e62c JL |
581 | if (xfrm_id_proto_match(x->id.proto, proto) && |
582 | (err = security_xfrm_state_delete(x)) != 0) { | |
ab5f5e8b JL |
583 | xfrm_audit_state_delete(x, 0, |
584 | audit_info->loginuid, | |
2532386f | 585 | audit_info->sessionid, |
ab5f5e8b | 586 | audit_info->secid); |
4aa2e62c JL |
587 | return err; |
588 | } | |
589 | } | |
590 | } | |
591 | ||
592 | return err; | |
593 | } | |
594 | #else | |
595 | static inline int | |
0e602451 | 596 | xfrm_state_flush_secctx_check(struct net *net, u8 proto, struct xfrm_audit *audit_info) |
4aa2e62c JL |
597 | { |
598 | return 0; | |
599 | } | |
600 | #endif | |
601 | ||
0e602451 | 602 | int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info) |
4aa2e62c | 603 | { |
9e64cc95 | 604 | int i, err = 0, cnt = 0; |
1da177e4 LT |
605 | |
606 | spin_lock_bh(&xfrm_state_lock); | |
0e602451 | 607 | err = xfrm_state_flush_secctx_check(net, proto, audit_info); |
4aa2e62c JL |
608 | if (err) |
609 | goto out; | |
610 | ||
9e64cc95 | 611 | err = -ESRCH; |
0e602451 | 612 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
8f126e37 | 613 | struct xfrm_state *x; |
1da177e4 | 614 | restart: |
b67bfe0d | 615 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
1da177e4 | 616 | if (!xfrm_state_kern(x) && |
5794708f | 617 | xfrm_id_proto_match(x->id.proto, proto)) { |
1da177e4 LT |
618 | xfrm_state_hold(x); |
619 | spin_unlock_bh(&xfrm_state_lock); | |
620 | ||
161a09e7 | 621 | err = xfrm_state_delete(x); |
ab5f5e8b JL |
622 | xfrm_audit_state_delete(x, err ? 0 : 1, |
623 | audit_info->loginuid, | |
2532386f | 624 | audit_info->sessionid, |
ab5f5e8b | 625 | audit_info->secid); |
1da177e4 | 626 | xfrm_state_put(x); |
9e64cc95 JHS |
627 | if (!err) |
628 | cnt++; | |
1da177e4 LT |
629 | |
630 | spin_lock_bh(&xfrm_state_lock); | |
631 | goto restart; | |
632 | } | |
633 | } | |
634 | } | |
9e64cc95 JHS |
635 | if (cnt) |
636 | err = 0; | |
4aa2e62c JL |
637 | |
638 | out: | |
1da177e4 | 639 | spin_unlock_bh(&xfrm_state_lock); |
0e602451 | 640 | wake_up(&net->xfrm.km_waitq); |
4aa2e62c | 641 | return err; |
1da177e4 LT |
642 | } |
643 | EXPORT_SYMBOL(xfrm_state_flush); | |
644 | ||
e071041b | 645 | void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si) |
28d8909b JHS |
646 | { |
647 | spin_lock_bh(&xfrm_state_lock); | |
e071041b AD |
648 | si->sadcnt = net->xfrm.state_num; |
649 | si->sadhcnt = net->xfrm.state_hmask; | |
28d8909b JHS |
650 | si->sadhmcnt = xfrm_state_hashmax; |
651 | spin_unlock_bh(&xfrm_state_lock); | |
652 | } | |
653 | EXPORT_SYMBOL(xfrm_sad_getinfo); | |
654 | ||
1da177e4 | 655 | static int |
1a898592 | 656 | xfrm_init_tempstate(struct xfrm_state *x, const struct flowi *fl, |
04686013 | 657 | const struct xfrm_tmpl *tmpl, |
33765d06 | 658 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
8444cf71 | 659 | unsigned short family) |
1da177e4 LT |
660 | { |
661 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
662 | if (!afinfo) | |
663 | return -1; | |
8444cf71 TE |
664 | afinfo->init_tempsel(&x->sel, fl); |
665 | ||
666 | if (family != tmpl->encap_family) { | |
667 | xfrm_state_put_afinfo(afinfo); | |
668 | afinfo = xfrm_state_get_afinfo(tmpl->encap_family); | |
669 | if (!afinfo) | |
670 | return -1; | |
671 | } | |
672 | afinfo->init_temprop(x, tmpl, daddr, saddr); | |
1da177e4 LT |
673 | xfrm_state_put_afinfo(afinfo); |
674 | return 0; | |
675 | } | |
676 | ||
9aa60088 DM |
677 | static struct xfrm_state *__xfrm_state_lookup(struct net *net, u32 mark, |
678 | const xfrm_address_t *daddr, | |
679 | __be32 spi, u8 proto, | |
680 | unsigned short family) | |
edcd5821 | 681 | { |
221df1ed | 682 | unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family); |
edcd5821 DM |
683 | struct xfrm_state *x; |
684 | ||
b67bfe0d | 685 | hlist_for_each_entry(x, net->xfrm.state_byspi+h, byspi) { |
edcd5821 DM |
686 | if (x->props.family != family || |
687 | x->id.spi != spi || | |
1802571b | 688 | x->id.proto != proto || |
70e94e66 | 689 | !xfrm_addr_equal(&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 DM |
707 | struct xfrm_state *x; |
708 | ||
b67bfe0d | 709 | hlist_for_each_entry(x, net->xfrm.state_bysrc+h, bysrc) { |
edcd5821 | 710 | if (x->props.family != family || |
1802571b | 711 | x->id.proto != proto || |
70e94e66 YH |
712 | !xfrm_addr_equal(&x->id.daddr, daddr, family) || |
713 | !xfrm_addr_equal(&x->props.saddr, saddr, family)) | |
edcd5821 DM |
714 | continue; |
715 | ||
3d6acfa7 JHS |
716 | if ((mark & x->mark.m) != x->mark.v) |
717 | continue; | |
edcd5821 DM |
718 | xfrm_state_hold(x); |
719 | return x; | |
720 | } | |
721 | ||
722 | return NULL; | |
723 | } | |
724 | ||
725 | static inline struct xfrm_state * | |
726 | __xfrm_state_locate(struct xfrm_state *x, int use_spi, int family) | |
727 | { | |
221df1ed | 728 | struct net *net = xs_net(x); |
bd55775c | 729 | u32 mark = x->mark.v & x->mark.m; |
221df1ed | 730 | |
edcd5821 | 731 | if (use_spi) |
bd55775c JHS |
732 | return __xfrm_state_lookup(net, mark, &x->id.daddr, |
733 | x->id.spi, x->id.proto, family); | |
edcd5821 | 734 | else |
bd55775c JHS |
735 | return __xfrm_state_lookup_byaddr(net, mark, |
736 | &x->id.daddr, | |
edcd5821 DM |
737 | &x->props.saddr, |
738 | x->id.proto, family); | |
739 | } | |
740 | ||
98806f75 | 741 | static void xfrm_hash_grow_check(struct net *net, int have_hash_collision) |
2fab22f2 PM |
742 | { |
743 | if (have_hash_collision && | |
98806f75 AD |
744 | (net->xfrm.state_hmask + 1) < xfrm_state_hashmax && |
745 | net->xfrm.state_num > net->xfrm.state_hmask) | |
746 | schedule_work(&net->xfrm.state_hash_work); | |
2fab22f2 PM |
747 | } |
748 | ||
08ec9af1 | 749 | static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x, |
4a08ab0f | 750 | const struct flowi *fl, unsigned short family, |
08ec9af1 DM |
751 | struct xfrm_state **best, int *acq_in_progress, |
752 | int *error) | |
753 | { | |
754 | /* Resolution logic: | |
755 | * 1. There is a valid state with matching selector. Done. | |
756 | * 2. Valid state with inappropriate selector. Skip. | |
757 | * | |
758 | * Entering area of "sysdeps". | |
759 | * | |
760 | * 3. If state is not valid, selector is temporary, it selects | |
761 | * only session which triggered previous resolution. Key | |
762 | * manager will do something to install a state with proper | |
763 | * selector. | |
764 | */ | |
765 | if (x->km.state == XFRM_STATE_VALID) { | |
766 | if ((x->sel.family && | |
767 | !xfrm_selector_match(&x->sel, fl, x->sel.family)) || | |
768 | !security_xfrm_state_pol_flow_match(x, pol, fl)) | |
769 | return; | |
770 | ||
771 | if (!*best || | |
772 | (*best)->km.dying > x->km.dying || | |
773 | ((*best)->km.dying == x->km.dying && | |
774 | (*best)->curlft.add_time < x->curlft.add_time)) | |
775 | *best = x; | |
776 | } else if (x->km.state == XFRM_STATE_ACQ) { | |
777 | *acq_in_progress = 1; | |
778 | } else if (x->km.state == XFRM_STATE_ERROR || | |
779 | x->km.state == XFRM_STATE_EXPIRED) { | |
780 | if (xfrm_selector_match(&x->sel, fl, x->sel.family) && | |
781 | security_xfrm_state_pol_flow_match(x, pol, fl)) | |
782 | *error = -ESRCH; | |
783 | } | |
784 | } | |
785 | ||
1da177e4 | 786 | struct xfrm_state * |
33765d06 | 787 | xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
b520e9f6 | 788 | const struct flowi *fl, struct xfrm_tmpl *tmpl, |
1da177e4 LT |
789 | struct xfrm_policy *pol, int *err, |
790 | unsigned short family) | |
791 | { | |
08ec9af1 | 792 | static xfrm_address_t saddr_wildcard = { }; |
5447c5e4 | 793 | struct net *net = xp_net(pol); |
6a783c90 | 794 | unsigned int h, h_wildcard; |
37b08e34 | 795 | struct xfrm_state *x, *x0, *to_put; |
1da177e4 LT |
796 | int acquire_in_progress = 0; |
797 | int error = 0; | |
798 | struct xfrm_state *best = NULL; | |
bd55775c | 799 | u32 mark = pol->mark.v & pol->mark.m; |
8444cf71 | 800 | unsigned short encap_family = tmpl->encap_family; |
a716c119 | 801 | |
37b08e34 DM |
802 | to_put = NULL; |
803 | ||
1da177e4 | 804 | spin_lock_bh(&xfrm_state_lock); |
8444cf71 | 805 | h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family); |
b67bfe0d | 806 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
8444cf71 | 807 | if (x->props.family == encap_family && |
1da177e4 | 808 | x->props.reqid == tmpl->reqid && |
3d6acfa7 | 809 | (mark & x->mark.m) == x->mark.v && |
fbd9a5b4 | 810 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
8444cf71 | 811 | xfrm_state_addr_check(x, daddr, saddr, encap_family) && |
1da177e4 LT |
812 | tmpl->mode == x->props.mode && |
813 | tmpl->id.proto == x->id.proto && | |
08ec9af1 | 814 | (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) |
1f673c5f | 815 | xfrm_state_look_at(pol, x, fl, encap_family, |
08ec9af1 DM |
816 | &best, &acquire_in_progress, &error); |
817 | } | |
6f115638 | 818 | if (best || acquire_in_progress) |
08ec9af1 DM |
819 | goto found; |
820 | ||
8444cf71 | 821 | h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, encap_family); |
b67bfe0d | 822 | hlist_for_each_entry(x, net->xfrm.state_bydst+h_wildcard, bydst) { |
8444cf71 | 823 | if (x->props.family == encap_family && |
08ec9af1 | 824 | x->props.reqid == tmpl->reqid && |
3d6acfa7 | 825 | (mark & x->mark.m) == x->mark.v && |
08ec9af1 | 826 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
f59bbdfa | 827 | xfrm_addr_equal(&x->id.daddr, daddr, encap_family) && |
08ec9af1 DM |
828 | tmpl->mode == x->props.mode && |
829 | tmpl->id.proto == x->id.proto && | |
830 | (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) | |
1f673c5f | 831 | xfrm_state_look_at(pol, x, fl, encap_family, |
08ec9af1 | 832 | &best, &acquire_in_progress, &error); |
1da177e4 LT |
833 | } |
834 | ||
08ec9af1 | 835 | found: |
1da177e4 LT |
836 | x = best; |
837 | if (!x && !error && !acquire_in_progress) { | |
5c5d281a | 838 | if (tmpl->id.spi && |
bd55775c | 839 | (x0 = __xfrm_state_lookup(net, mark, daddr, tmpl->id.spi, |
8444cf71 | 840 | tmpl->id.proto, encap_family)) != NULL) { |
37b08e34 | 841 | to_put = x0; |
1da177e4 LT |
842 | error = -EEXIST; |
843 | goto out; | |
844 | } | |
5447c5e4 | 845 | x = xfrm_state_alloc(net); |
1da177e4 LT |
846 | if (x == NULL) { |
847 | error = -ENOMEM; | |
848 | goto out; | |
849 | } | |
8444cf71 | 850 | /* Initialize temporary state matching only |
1da177e4 | 851 | * to current session. */ |
8444cf71 | 852 | xfrm_init_tempstate(x, fl, tmpl, daddr, saddr, family); |
bd55775c | 853 | memcpy(&x->mark, &pol->mark, sizeof(x->mark)); |
1da177e4 | 854 | |
1d28f42c | 855 | error = security_xfrm_state_alloc_acquire(x, pol->security, fl->flowi_secid); |
e0d1caa7 VY |
856 | if (error) { |
857 | x->km.state = XFRM_STATE_DEAD; | |
37b08e34 | 858 | to_put = x; |
e0d1caa7 VY |
859 | x = NULL; |
860 | goto out; | |
861 | } | |
862 | ||
1da177e4 LT |
863 | if (km_query(x, tmpl, pol) == 0) { |
864 | x->km.state = XFRM_STATE_ACQ; | |
5447c5e4 AD |
865 | list_add(&x->km.all, &net->xfrm.state_all); |
866 | hlist_add_head(&x->bydst, net->xfrm.state_bydst+h); | |
8444cf71 | 867 | h = xfrm_src_hash(net, daddr, saddr, encap_family); |
5447c5e4 | 868 | hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h); |
1da177e4 | 869 | if (x->id.spi) { |
8444cf71 | 870 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, encap_family); |
5447c5e4 | 871 | hlist_add_head(&x->byspi, net->xfrm.state_byspi+h); |
1da177e4 | 872 | } |
b27aeadb | 873 | x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires; |
9e0d57fd | 874 | tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL); |
5447c5e4 AD |
875 | net->xfrm.state_num++; |
876 | xfrm_hash_grow_check(net, x->bydst.next != NULL); | |
1da177e4 LT |
877 | } else { |
878 | x->km.state = XFRM_STATE_DEAD; | |
37b08e34 | 879 | to_put = x; |
1da177e4 LT |
880 | x = NULL; |
881 | error = -ESRCH; | |
882 | } | |
883 | } | |
884 | out: | |
885 | if (x) | |
886 | xfrm_state_hold(x); | |
887 | else | |
888 | *err = acquire_in_progress ? -EAGAIN : error; | |
889 | spin_unlock_bh(&xfrm_state_lock); | |
37b08e34 DM |
890 | if (to_put) |
891 | xfrm_state_put(to_put); | |
1da177e4 LT |
892 | return x; |
893 | } | |
894 | ||
628529b6 | 895 | struct xfrm_state * |
bd55775c | 896 | xfrm_stateonly_find(struct net *net, u32 mark, |
5447c5e4 | 897 | xfrm_address_t *daddr, xfrm_address_t *saddr, |
628529b6 JHS |
898 | unsigned short family, u8 mode, u8 proto, u32 reqid) |
899 | { | |
4bda4f25 | 900 | unsigned int h; |
628529b6 | 901 | struct xfrm_state *rx = NULL, *x = NULL; |
628529b6 JHS |
902 | |
903 | spin_lock(&xfrm_state_lock); | |
5447c5e4 | 904 | h = xfrm_dst_hash(net, daddr, saddr, reqid, family); |
b67bfe0d | 905 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
628529b6 JHS |
906 | if (x->props.family == family && |
907 | x->props.reqid == reqid && | |
3d6acfa7 | 908 | (mark & x->mark.m) == x->mark.v && |
628529b6 JHS |
909 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
910 | xfrm_state_addr_check(x, daddr, saddr, family) && | |
911 | mode == x->props.mode && | |
912 | proto == x->id.proto && | |
913 | x->km.state == XFRM_STATE_VALID) { | |
914 | rx = x; | |
915 | break; | |
916 | } | |
917 | } | |
918 | ||
919 | if (rx) | |
920 | xfrm_state_hold(rx); | |
921 | spin_unlock(&xfrm_state_lock); | |
922 | ||
923 | ||
924 | return rx; | |
925 | } | |
926 | EXPORT_SYMBOL(xfrm_stateonly_find); | |
927 | ||
1da177e4 LT |
928 | static void __xfrm_state_insert(struct xfrm_state *x) |
929 | { | |
98806f75 | 930 | struct net *net = xs_net(x); |
a624c108 | 931 | unsigned int h; |
1da177e4 | 932 | |
98806f75 | 933 | list_add(&x->km.all, &net->xfrm.state_all); |
4c563f76 | 934 | |
98806f75 | 935 | h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr, |
c1969f29 | 936 | x->props.reqid, x->props.family); |
98806f75 | 937 | hlist_add_head(&x->bydst, net->xfrm.state_bydst+h); |
1da177e4 | 938 | |
98806f75 AD |
939 | h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family); |
940 | hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h); | |
1da177e4 | 941 | |
7b4dc360 | 942 | if (x->id.spi) { |
98806f75 | 943 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, |
6c44e6b7 MN |
944 | x->props.family); |
945 | ||
98806f75 | 946 | hlist_add_head(&x->byspi, net->xfrm.state_byspi+h); |
6c44e6b7 MN |
947 | } |
948 | ||
9e0d57fd | 949 | tasklet_hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL); |
a47f0ce0 DM |
950 | if (x->replay_maxage) |
951 | mod_timer(&x->rtimer, jiffies + x->replay_maxage); | |
f8cd5488 | 952 | |
98806f75 | 953 | wake_up(&net->xfrm.km_waitq); |
f034b5d4 | 954 | |
98806f75 | 955 | net->xfrm.state_num++; |
f034b5d4 | 956 | |
98806f75 | 957 | xfrm_hash_grow_check(net, x->bydst.next != NULL); |
1da177e4 LT |
958 | } |
959 | ||
c7f5ea3a DM |
960 | /* xfrm_state_lock is held */ |
961 | static void __xfrm_state_bump_genids(struct xfrm_state *xnew) | |
962 | { | |
98806f75 | 963 | struct net *net = xs_net(xnew); |
c7f5ea3a DM |
964 | unsigned short family = xnew->props.family; |
965 | u32 reqid = xnew->props.reqid; | |
966 | struct xfrm_state *x; | |
c7f5ea3a | 967 | unsigned int h; |
3d6acfa7 | 968 | u32 mark = xnew->mark.v & xnew->mark.m; |
c7f5ea3a | 969 | |
98806f75 | 970 | h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family); |
b67bfe0d | 971 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
c7f5ea3a DM |
972 | if (x->props.family == family && |
973 | x->props.reqid == reqid && | |
3d6acfa7 | 974 | (mark & x->mark.m) == x->mark.v && |
70e94e66 YH |
975 | xfrm_addr_equal(&x->id.daddr, &xnew->id.daddr, family) && |
976 | xfrm_addr_equal(&x->props.saddr, &xnew->props.saddr, family)) | |
34996cb9 | 977 | x->genid++; |
c7f5ea3a DM |
978 | } |
979 | } | |
980 | ||
1da177e4 LT |
981 | void xfrm_state_insert(struct xfrm_state *x) |
982 | { | |
983 | spin_lock_bh(&xfrm_state_lock); | |
c7f5ea3a | 984 | __xfrm_state_bump_genids(x); |
1da177e4 LT |
985 | __xfrm_state_insert(x); |
986 | spin_unlock_bh(&xfrm_state_lock); | |
987 | } | |
988 | EXPORT_SYMBOL(xfrm_state_insert); | |
989 | ||
2770834c | 990 | /* xfrm_state_lock is held */ |
e473fcb4 MK |
991 | static struct xfrm_state *__find_acq_core(struct net *net, |
992 | const struct xfrm_mark *m, | |
a70486f0 DM |
993 | unsigned short family, u8 mode, |
994 | u32 reqid, u8 proto, | |
995 | const xfrm_address_t *daddr, | |
e473fcb4 MK |
996 | const xfrm_address_t *saddr, |
997 | int create) | |
2770834c | 998 | { |
5447c5e4 | 999 | unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family); |
2770834c | 1000 | struct xfrm_state *x; |
3d6acfa7 | 1001 | u32 mark = m->v & m->m; |
2770834c | 1002 | |
b67bfe0d | 1003 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
2770834c DM |
1004 | if (x->props.reqid != reqid || |
1005 | x->props.mode != mode || | |
1006 | x->props.family != family || | |
1007 | x->km.state != XFRM_STATE_ACQ || | |
75e252d9 | 1008 | x->id.spi != 0 || |
1802571b | 1009 | x->id.proto != proto || |
3d6acfa7 | 1010 | (mark & x->mark.m) != x->mark.v || |
70e94e66 YH |
1011 | !xfrm_addr_equal(&x->id.daddr, daddr, family) || |
1012 | !xfrm_addr_equal(&x->props.saddr, saddr, family)) | |
2770834c DM |
1013 | continue; |
1014 | ||
2770834c DM |
1015 | xfrm_state_hold(x); |
1016 | return x; | |
1017 | } | |
1018 | ||
1019 | if (!create) | |
1020 | return NULL; | |
1021 | ||
5447c5e4 | 1022 | x = xfrm_state_alloc(net); |
2770834c DM |
1023 | if (likely(x)) { |
1024 | switch (family) { | |
1025 | case AF_INET: | |
1026 | x->sel.daddr.a4 = daddr->a4; | |
1027 | x->sel.saddr.a4 = saddr->a4; | |
1028 | x->sel.prefixlen_d = 32; | |
1029 | x->sel.prefixlen_s = 32; | |
1030 | x->props.saddr.a4 = saddr->a4; | |
1031 | x->id.daddr.a4 = daddr->a4; | |
1032 | break; | |
1033 | ||
1034 | case AF_INET6: | |
4e3fd7a0 AD |
1035 | *(struct in6_addr *)x->sel.daddr.a6 = *(struct in6_addr *)daddr; |
1036 | *(struct in6_addr *)x->sel.saddr.a6 = *(struct in6_addr *)saddr; | |
2770834c DM |
1037 | x->sel.prefixlen_d = 128; |
1038 | x->sel.prefixlen_s = 128; | |
4e3fd7a0 AD |
1039 | *(struct in6_addr *)x->props.saddr.a6 = *(struct in6_addr *)saddr; |
1040 | *(struct in6_addr *)x->id.daddr.a6 = *(struct in6_addr *)daddr; | |
2770834c | 1041 | break; |
3ff50b79 | 1042 | } |
2770834c DM |
1043 | |
1044 | x->km.state = XFRM_STATE_ACQ; | |
1045 | x->id.proto = proto; | |
1046 | x->props.family = family; | |
1047 | x->props.mode = mode; | |
1048 | x->props.reqid = reqid; | |
bd55775c JHS |
1049 | x->mark.v = m->v; |
1050 | x->mark.m = m->m; | |
b27aeadb | 1051 | x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires; |
2770834c | 1052 | xfrm_state_hold(x); |
9e0d57fd | 1053 | tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL); |
5447c5e4 AD |
1054 | list_add(&x->km.all, &net->xfrm.state_all); |
1055 | hlist_add_head(&x->bydst, net->xfrm.state_bydst+h); | |
1056 | h = xfrm_src_hash(net, daddr, saddr, family); | |
1057 | hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h); | |
918049f0 | 1058 | |
5447c5e4 | 1059 | net->xfrm.state_num++; |
918049f0 | 1060 | |
5447c5e4 | 1061 | xfrm_hash_grow_check(net, x->bydst.next != NULL); |
2770834c DM |
1062 | } |
1063 | ||
1064 | return x; | |
1065 | } | |
1066 | ||
bd55775c | 1067 | static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); |
1da177e4 LT |
1068 | |
1069 | int xfrm_state_add(struct xfrm_state *x) | |
1070 | { | |
5447c5e4 | 1071 | struct net *net = xs_net(x); |
37b08e34 | 1072 | struct xfrm_state *x1, *to_put; |
1da177e4 LT |
1073 | int family; |
1074 | int err; | |
bd55775c | 1075 | u32 mark = x->mark.v & x->mark.m; |
eb2971b6 | 1076 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
1da177e4 LT |
1077 | |
1078 | family = x->props.family; | |
1da177e4 | 1079 | |
37b08e34 DM |
1080 | to_put = NULL; |
1081 | ||
1da177e4 LT |
1082 | spin_lock_bh(&xfrm_state_lock); |
1083 | ||
edcd5821 | 1084 | x1 = __xfrm_state_locate(x, use_spi, family); |
1da177e4 | 1085 | if (x1) { |
37b08e34 | 1086 | to_put = x1; |
1da177e4 LT |
1087 | x1 = NULL; |
1088 | err = -EEXIST; | |
1089 | goto out; | |
1090 | } | |
1091 | ||
eb2971b6 | 1092 | if (use_spi && x->km.seq) { |
bd55775c | 1093 | x1 = __xfrm_find_acq_byseq(net, mark, x->km.seq); |
75e252d9 | 1094 | if (x1 && ((x1->id.proto != x->id.proto) || |
70e94e66 | 1095 | !xfrm_addr_equal(&x1->id.daddr, &x->id.daddr, family))) { |
37b08e34 | 1096 | to_put = x1; |
1da177e4 LT |
1097 | x1 = NULL; |
1098 | } | |
1099 | } | |
1100 | ||
eb2971b6 | 1101 | if (use_spi && !x1) |
bd55775c JHS |
1102 | x1 = __find_acq_core(net, &x->mark, family, x->props.mode, |
1103 | x->props.reqid, x->id.proto, | |
2770834c | 1104 | &x->id.daddr, &x->props.saddr, 0); |
1da177e4 | 1105 | |
c7f5ea3a | 1106 | __xfrm_state_bump_genids(x); |
1da177e4 LT |
1107 | __xfrm_state_insert(x); |
1108 | err = 0; | |
1109 | ||
1110 | out: | |
1111 | spin_unlock_bh(&xfrm_state_lock); | |
1da177e4 LT |
1112 | |
1113 | if (x1) { | |
1114 | xfrm_state_delete(x1); | |
1115 | xfrm_state_put(x1); | |
1116 | } | |
1117 | ||
37b08e34 DM |
1118 | if (to_put) |
1119 | xfrm_state_put(to_put); | |
1120 | ||
1da177e4 LT |
1121 | return err; |
1122 | } | |
1123 | EXPORT_SYMBOL(xfrm_state_add); | |
1124 | ||
80c9abaa | 1125 | #ifdef CONFIG_XFRM_MIGRATE |
6666351d | 1126 | static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, int *errp) |
80c9abaa | 1127 | { |
98806f75 | 1128 | struct net *net = xs_net(orig); |
80c9abaa | 1129 | int err = -ENOMEM; |
98806f75 | 1130 | struct xfrm_state *x = xfrm_state_alloc(net); |
80c9abaa | 1131 | if (!x) |
553f9118 | 1132 | goto out; |
80c9abaa SS |
1133 | |
1134 | memcpy(&x->id, &orig->id, sizeof(x->id)); | |
1135 | memcpy(&x->sel, &orig->sel, sizeof(x->sel)); | |
1136 | memcpy(&x->lft, &orig->lft, sizeof(x->lft)); | |
1137 | x->props.mode = orig->props.mode; | |
1138 | x->props.replay_window = orig->props.replay_window; | |
1139 | x->props.reqid = orig->props.reqid; | |
1140 | x->props.family = orig->props.family; | |
1141 | x->props.saddr = orig->props.saddr; | |
1142 | ||
1143 | if (orig->aalg) { | |
4447bb33 | 1144 | x->aalg = xfrm_algo_auth_clone(orig->aalg); |
80c9abaa SS |
1145 | if (!x->aalg) |
1146 | goto error; | |
1147 | } | |
1148 | x->props.aalgo = orig->props.aalgo; | |
1149 | ||
1150 | if (orig->ealg) { | |
1151 | x->ealg = xfrm_algo_clone(orig->ealg); | |
1152 | if (!x->ealg) | |
1153 | goto error; | |
1154 | } | |
1155 | x->props.ealgo = orig->props.ealgo; | |
1156 | ||
1157 | if (orig->calg) { | |
1158 | x->calg = xfrm_algo_clone(orig->calg); | |
1159 | if (!x->calg) | |
1160 | goto error; | |
1161 | } | |
1162 | x->props.calgo = orig->props.calgo; | |
1163 | ||
a716c119 | 1164 | if (orig->encap) { |
80c9abaa SS |
1165 | x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL); |
1166 | if (!x->encap) | |
1167 | goto error; | |
1168 | } | |
1169 | ||
1170 | if (orig->coaddr) { | |
1171 | x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr), | |
1172 | GFP_KERNEL); | |
1173 | if (!x->coaddr) | |
1174 | goto error; | |
1175 | } | |
1176 | ||
af2f464e SK |
1177 | if (orig->replay_esn) { |
1178 | err = xfrm_replay_clone(x, orig); | |
1179 | if (err) | |
1180 | goto error; | |
1181 | } | |
1182 | ||
bd55775c JHS |
1183 | memcpy(&x->mark, &orig->mark, sizeof(x->mark)); |
1184 | ||
80c9abaa SS |
1185 | err = xfrm_init_state(x); |
1186 | if (err) | |
1187 | goto error; | |
1188 | ||
1189 | x->props.flags = orig->props.flags; | |
a947b0a9 | 1190 | x->props.extra_flags = orig->props.extra_flags; |
80c9abaa SS |
1191 | |
1192 | x->curlft.add_time = orig->curlft.add_time; | |
1193 | x->km.state = orig->km.state; | |
1194 | x->km.seq = orig->km.seq; | |
1195 | ||
1196 | return x; | |
1197 | ||
1198 | error: | |
553f9118 HX |
1199 | xfrm_state_put(x); |
1200 | out: | |
80c9abaa SS |
1201 | if (errp) |
1202 | *errp = err; | |
80c9abaa SS |
1203 | return NULL; |
1204 | } | |
80c9abaa SS |
1205 | |
1206 | /* xfrm_state_lock is held */ | |
1207 | struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m) | |
1208 | { | |
1209 | unsigned int h; | |
1210 | struct xfrm_state *x; | |
80c9abaa SS |
1211 | |
1212 | if (m->reqid) { | |
64d0cd00 | 1213 | h = xfrm_dst_hash(&init_net, &m->old_daddr, &m->old_saddr, |
80c9abaa | 1214 | m->reqid, m->old_family); |
b67bfe0d | 1215 | hlist_for_each_entry(x, init_net.xfrm.state_bydst+h, bydst) { |
80c9abaa SS |
1216 | if (x->props.mode != m->mode || |
1217 | x->id.proto != m->proto) | |
1218 | continue; | |
1219 | if (m->reqid && x->props.reqid != m->reqid) | |
1220 | continue; | |
70e94e66 YH |
1221 | if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr, |
1222 | m->old_family) || | |
1223 | !xfrm_addr_equal(&x->props.saddr, &m->old_saddr, | |
1224 | m->old_family)) | |
80c9abaa SS |
1225 | continue; |
1226 | xfrm_state_hold(x); | |
1227 | return x; | |
1228 | } | |
1229 | } else { | |
64d0cd00 | 1230 | h = xfrm_src_hash(&init_net, &m->old_daddr, &m->old_saddr, |
80c9abaa | 1231 | m->old_family); |
b67bfe0d | 1232 | hlist_for_each_entry(x, init_net.xfrm.state_bysrc+h, bysrc) { |
80c9abaa SS |
1233 | if (x->props.mode != m->mode || |
1234 | x->id.proto != m->proto) | |
1235 | continue; | |
70e94e66 YH |
1236 | if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr, |
1237 | m->old_family) || | |
1238 | !xfrm_addr_equal(&x->props.saddr, &m->old_saddr, | |
1239 | m->old_family)) | |
80c9abaa SS |
1240 | continue; |
1241 | xfrm_state_hold(x); | |
1242 | return x; | |
1243 | } | |
1244 | } | |
1245 | ||
a716c119 | 1246 | return NULL; |
80c9abaa SS |
1247 | } |
1248 | EXPORT_SYMBOL(xfrm_migrate_state_find); | |
1249 | ||
1250 | struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, | |
1251 | struct xfrm_migrate *m) | |
1252 | { | |
1253 | struct xfrm_state *xc; | |
1254 | int err; | |
1255 | ||
1256 | xc = xfrm_state_clone(x, &err); | |
1257 | if (!xc) | |
1258 | return NULL; | |
1259 | ||
1260 | memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr)); | |
1261 | memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr)); | |
1262 | ||
1263 | /* add state */ | |
70e94e66 | 1264 | if (xfrm_addr_equal(&x->id.daddr, &m->new_daddr, m->new_family)) { |
80c9abaa SS |
1265 | /* a care is needed when the destination address of the |
1266 | state is to be updated as it is a part of triplet */ | |
1267 | xfrm_state_insert(xc); | |
1268 | } else { | |
1269 | if ((err = xfrm_state_add(xc)) < 0) | |
1270 | goto error; | |
1271 | } | |
1272 | ||
1273 | return xc; | |
1274 | error: | |
78347c8c | 1275 | xfrm_state_put(xc); |
80c9abaa SS |
1276 | return NULL; |
1277 | } | |
1278 | EXPORT_SYMBOL(xfrm_state_migrate); | |
1279 | #endif | |
1280 | ||
1da177e4 LT |
1281 | int xfrm_state_update(struct xfrm_state *x) |
1282 | { | |
37b08e34 | 1283 | struct xfrm_state *x1, *to_put; |
1da177e4 | 1284 | int err; |
eb2971b6 | 1285 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
1da177e4 | 1286 | |
37b08e34 DM |
1287 | to_put = NULL; |
1288 | ||
1da177e4 | 1289 | spin_lock_bh(&xfrm_state_lock); |
edcd5821 | 1290 | x1 = __xfrm_state_locate(x, use_spi, x->props.family); |
1da177e4 LT |
1291 | |
1292 | err = -ESRCH; | |
1293 | if (!x1) | |
1294 | goto out; | |
1295 | ||
1296 | if (xfrm_state_kern(x1)) { | |
37b08e34 | 1297 | to_put = x1; |
1da177e4 LT |
1298 | err = -EEXIST; |
1299 | goto out; | |
1300 | } | |
1301 | ||
1302 | if (x1->km.state == XFRM_STATE_ACQ) { | |
1303 | __xfrm_state_insert(x); | |
1304 | x = NULL; | |
1305 | } | |
1306 | err = 0; | |
1307 | ||
1308 | out: | |
1309 | spin_unlock_bh(&xfrm_state_lock); | |
1da177e4 | 1310 | |
37b08e34 DM |
1311 | if (to_put) |
1312 | xfrm_state_put(to_put); | |
1313 | ||
1da177e4 LT |
1314 | if (err) |
1315 | return err; | |
1316 | ||
1317 | if (!x) { | |
1318 | xfrm_state_delete(x1); | |
1319 | xfrm_state_put(x1); | |
1320 | return 0; | |
1321 | } | |
1322 | ||
1323 | err = -EINVAL; | |
1324 | spin_lock_bh(&x1->lock); | |
1325 | if (likely(x1->km.state == XFRM_STATE_VALID)) { | |
1326 | if (x->encap && x1->encap) | |
1327 | memcpy(x1->encap, x->encap, sizeof(*x1->encap)); | |
060f02a3 NT |
1328 | if (x->coaddr && x1->coaddr) { |
1329 | memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr)); | |
1330 | } | |
1331 | if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel))) | |
1332 | memcpy(&x1->sel, &x->sel, sizeof(x1->sel)); | |
1da177e4 LT |
1333 | memcpy(&x1->lft, &x->lft, sizeof(x1->lft)); |
1334 | x1->km.dying = 0; | |
1335 | ||
9e0d57fd | 1336 | tasklet_hrtimer_start(&x1->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL); |
1da177e4 LT |
1337 | if (x1->curlft.use_time) |
1338 | xfrm_state_check_expire(x1); | |
1339 | ||
1340 | err = 0; | |
8fcbc637 TG |
1341 | x->km.state = XFRM_STATE_DEAD; |
1342 | __xfrm_state_put(x); | |
1da177e4 LT |
1343 | } |
1344 | spin_unlock_bh(&x1->lock); | |
1345 | ||
1346 | xfrm_state_put(x1); | |
1347 | ||
1348 | return err; | |
1349 | } | |
1350 | EXPORT_SYMBOL(xfrm_state_update); | |
1351 | ||
1352 | int xfrm_state_check_expire(struct xfrm_state *x) | |
1353 | { | |
1354 | if (!x->curlft.use_time) | |
9d729f72 | 1355 | x->curlft.use_time = get_seconds(); |
1da177e4 | 1356 | |
1da177e4 LT |
1357 | if (x->curlft.bytes >= x->lft.hard_byte_limit || |
1358 | x->curlft.packets >= x->lft.hard_packet_limit) { | |
4666faab | 1359 | x->km.state = XFRM_STATE_EXPIRED; |
9e0d57fd | 1360 | tasklet_hrtimer_start(&x->mtimer, ktime_set(0,0), HRTIMER_MODE_REL); |
1da177e4 LT |
1361 | return -EINVAL; |
1362 | } | |
1363 | ||
1364 | if (!x->km.dying && | |
1365 | (x->curlft.bytes >= x->lft.soft_byte_limit || | |
4666faab HX |
1366 | x->curlft.packets >= x->lft.soft_packet_limit)) { |
1367 | x->km.dying = 1; | |
53bc6b4d | 1368 | km_state_expired(x, 0, 0); |
4666faab | 1369 | } |
1da177e4 LT |
1370 | return 0; |
1371 | } | |
1372 | EXPORT_SYMBOL(xfrm_state_check_expire); | |
1373 | ||
1da177e4 | 1374 | struct xfrm_state * |
a70486f0 | 1375 | xfrm_state_lookup(struct net *net, u32 mark, const xfrm_address_t *daddr, __be32 spi, |
bd55775c | 1376 | u8 proto, unsigned short family) |
1da177e4 LT |
1377 | { |
1378 | struct xfrm_state *x; | |
1da177e4 LT |
1379 | |
1380 | spin_lock_bh(&xfrm_state_lock); | |
bd55775c | 1381 | x = __xfrm_state_lookup(net, mark, daddr, spi, proto, family); |
1da177e4 | 1382 | spin_unlock_bh(&xfrm_state_lock); |
1da177e4 LT |
1383 | return x; |
1384 | } | |
1385 | EXPORT_SYMBOL(xfrm_state_lookup); | |
1386 | ||
1387 | struct xfrm_state * | |
bd55775c | 1388 | xfrm_state_lookup_byaddr(struct net *net, u32 mark, |
a70486f0 | 1389 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
eb2971b6 MN |
1390 | u8 proto, unsigned short family) |
1391 | { | |
1392 | struct xfrm_state *x; | |
eb2971b6 MN |
1393 | |
1394 | spin_lock_bh(&xfrm_state_lock); | |
bd55775c | 1395 | x = __xfrm_state_lookup_byaddr(net, mark, daddr, saddr, proto, family); |
eb2971b6 | 1396 | spin_unlock_bh(&xfrm_state_lock); |
eb2971b6 MN |
1397 | return x; |
1398 | } | |
1399 | EXPORT_SYMBOL(xfrm_state_lookup_byaddr); | |
1400 | ||
1401 | struct xfrm_state * | |
e473fcb4 MK |
1402 | xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, u8 mode, u32 reqid, |
1403 | u8 proto, const xfrm_address_t *daddr, | |
1404 | const xfrm_address_t *saddr, int create, unsigned short family) | |
1da177e4 LT |
1405 | { |
1406 | struct xfrm_state *x; | |
1da177e4 LT |
1407 | |
1408 | spin_lock_bh(&xfrm_state_lock); | |
bd55775c | 1409 | x = __find_acq_core(net, mark, family, mode, reqid, proto, daddr, saddr, create); |
1da177e4 | 1410 | spin_unlock_bh(&xfrm_state_lock); |
2770834c | 1411 | |
1da177e4 LT |
1412 | return x; |
1413 | } | |
1414 | EXPORT_SYMBOL(xfrm_find_acq); | |
1415 | ||
41a49cc3 MN |
1416 | #ifdef CONFIG_XFRM_SUB_POLICY |
1417 | int | |
1418 | xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, | |
1419 | unsigned short family) | |
1420 | { | |
1421 | int err = 0; | |
1422 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
1423 | if (!afinfo) | |
1424 | return -EAFNOSUPPORT; | |
1425 | ||
1426 | spin_lock_bh(&xfrm_state_lock); | |
1427 | if (afinfo->tmpl_sort) | |
1428 | err = afinfo->tmpl_sort(dst, src, n); | |
1429 | spin_unlock_bh(&xfrm_state_lock); | |
1430 | xfrm_state_put_afinfo(afinfo); | |
1431 | return err; | |
1432 | } | |
1433 | EXPORT_SYMBOL(xfrm_tmpl_sort); | |
1434 | ||
1435 | int | |
1436 | xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, | |
1437 | unsigned short family) | |
1438 | { | |
1439 | int err = 0; | |
1440 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
1441 | if (!afinfo) | |
1442 | return -EAFNOSUPPORT; | |
1443 | ||
1444 | spin_lock_bh(&xfrm_state_lock); | |
1445 | if (afinfo->state_sort) | |
1446 | err = afinfo->state_sort(dst, src, n); | |
1447 | spin_unlock_bh(&xfrm_state_lock); | |
1448 | xfrm_state_put_afinfo(afinfo); | |
1449 | return err; | |
1450 | } | |
1451 | EXPORT_SYMBOL(xfrm_state_sort); | |
1452 | #endif | |
1453 | ||
1da177e4 LT |
1454 | /* Silly enough, but I'm lazy to build resolution list */ |
1455 | ||
bd55775c | 1456 | static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq) |
1da177e4 LT |
1457 | { |
1458 | int i; | |
1da177e4 | 1459 | |
5447c5e4 | 1460 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
8f126e37 DM |
1461 | struct xfrm_state *x; |
1462 | ||
b67bfe0d | 1463 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
8f126e37 | 1464 | if (x->km.seq == seq && |
3d6acfa7 | 1465 | (mark & x->mark.m) == x->mark.v && |
8f126e37 | 1466 | x->km.state == XFRM_STATE_ACQ) { |
1da177e4 LT |
1467 | xfrm_state_hold(x); |
1468 | return x; | |
1469 | } | |
1470 | } | |
1471 | } | |
1472 | return NULL; | |
1473 | } | |
1474 | ||
bd55775c | 1475 | struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq) |
1da177e4 LT |
1476 | { |
1477 | struct xfrm_state *x; | |
1478 | ||
1479 | spin_lock_bh(&xfrm_state_lock); | |
bd55775c | 1480 | x = __xfrm_find_acq_byseq(net, mark, seq); |
1da177e4 LT |
1481 | spin_unlock_bh(&xfrm_state_lock); |
1482 | return x; | |
1483 | } | |
1484 | EXPORT_SYMBOL(xfrm_find_acq_byseq); | |
1485 | ||
1486 | u32 xfrm_get_acqseq(void) | |
1487 | { | |
1488 | u32 res; | |
6836b9bd | 1489 | static atomic_t acqseq; |
1490 | ||
1491 | do { | |
1492 | res = atomic_inc_return(&acqseq); | |
1493 | } while (!res); | |
1da177e4 | 1494 | |
1da177e4 LT |
1495 | return res; |
1496 | } | |
1497 | EXPORT_SYMBOL(xfrm_get_acqseq); | |
1498 | ||
658b219e | 1499 | int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high) |
1da177e4 | 1500 | { |
221df1ed | 1501 | struct net *net = xs_net(x); |
f034b5d4 | 1502 | unsigned int h; |
1da177e4 | 1503 | struct xfrm_state *x0; |
658b219e HX |
1504 | int err = -ENOENT; |
1505 | __be32 minspi = htonl(low); | |
1506 | __be32 maxspi = htonl(high); | |
bd55775c | 1507 | u32 mark = x->mark.v & x->mark.m; |
1da177e4 | 1508 | |
658b219e HX |
1509 | spin_lock_bh(&x->lock); |
1510 | if (x->km.state == XFRM_STATE_DEAD) | |
1511 | goto unlock; | |
1512 | ||
1513 | err = 0; | |
1da177e4 | 1514 | if (x->id.spi) |
658b219e HX |
1515 | goto unlock; |
1516 | ||
1517 | err = -ENOENT; | |
1da177e4 LT |
1518 | |
1519 | if (minspi == maxspi) { | |
bd55775c | 1520 | x0 = xfrm_state_lookup(net, mark, &x->id.daddr, minspi, x->id.proto, x->props.family); |
1da177e4 LT |
1521 | if (x0) { |
1522 | xfrm_state_put(x0); | |
658b219e | 1523 | goto unlock; |
1da177e4 LT |
1524 | } |
1525 | x->id.spi = minspi; | |
1526 | } else { | |
1527 | u32 spi = 0; | |
26977b4e AV |
1528 | for (h=0; h<high-low+1; h++) { |
1529 | spi = low + net_random()%(high-low+1); | |
bd55775c | 1530 | x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family); |
1da177e4 LT |
1531 | if (x0 == NULL) { |
1532 | x->id.spi = htonl(spi); | |
1533 | break; | |
1534 | } | |
1535 | xfrm_state_put(x0); | |
1536 | } | |
1537 | } | |
1538 | if (x->id.spi) { | |
1539 | spin_lock_bh(&xfrm_state_lock); | |
12604d8a AD |
1540 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family); |
1541 | hlist_add_head(&x->byspi, net->xfrm.state_byspi+h); | |
1da177e4 | 1542 | spin_unlock_bh(&xfrm_state_lock); |
658b219e HX |
1543 | |
1544 | err = 0; | |
1da177e4 | 1545 | } |
658b219e HX |
1546 | |
1547 | unlock: | |
1548 | spin_unlock_bh(&x->lock); | |
1549 | ||
1550 | return err; | |
1da177e4 LT |
1551 | } |
1552 | EXPORT_SYMBOL(xfrm_alloc_spi); | |
1553 | ||
284fa7da | 1554 | int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, |
4c563f76 | 1555 | int (*func)(struct xfrm_state *, int, void*), |
1da177e4 LT |
1556 | void *data) |
1557 | { | |
12a169e7 HX |
1558 | struct xfrm_state *state; |
1559 | struct xfrm_state_walk *x; | |
1da177e4 LT |
1560 | int err = 0; |
1561 | ||
12a169e7 | 1562 | if (walk->seq != 0 && list_empty(&walk->all)) |
4c563f76 TT |
1563 | return 0; |
1564 | ||
1da177e4 | 1565 | spin_lock_bh(&xfrm_state_lock); |
12a169e7 | 1566 | if (list_empty(&walk->all)) |
284fa7da | 1567 | x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all); |
12a169e7 HX |
1568 | else |
1569 | x = list_entry(&walk->all, struct xfrm_state_walk, all); | |
284fa7da | 1570 | list_for_each_entry_from(x, &net->xfrm.state_all, all) { |
12a169e7 | 1571 | if (x->state == XFRM_STATE_DEAD) |
4c563f76 | 1572 | continue; |
12a169e7 HX |
1573 | state = container_of(x, struct xfrm_state, km); |
1574 | if (!xfrm_id_proto_match(state->id.proto, walk->proto)) | |
4c563f76 | 1575 | continue; |
12a169e7 HX |
1576 | err = func(state, walk->seq, data); |
1577 | if (err) { | |
1578 | list_move_tail(&walk->all, &x->all); | |
1579 | goto out; | |
1da177e4 | 1580 | } |
12a169e7 | 1581 | walk->seq++; |
1da177e4 | 1582 | } |
12a169e7 | 1583 | if (walk->seq == 0) { |
1da177e4 LT |
1584 | err = -ENOENT; |
1585 | goto out; | |
1586 | } | |
12a169e7 | 1587 | list_del_init(&walk->all); |
1da177e4 LT |
1588 | out: |
1589 | spin_unlock_bh(&xfrm_state_lock); | |
1590 | return err; | |
1591 | } | |
1592 | EXPORT_SYMBOL(xfrm_state_walk); | |
1593 | ||
5c182458 HX |
1594 | void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto) |
1595 | { | |
12a169e7 | 1596 | INIT_LIST_HEAD(&walk->all); |
5c182458 | 1597 | walk->proto = proto; |
12a169e7 HX |
1598 | walk->state = XFRM_STATE_DEAD; |
1599 | walk->seq = 0; | |
5c182458 HX |
1600 | } |
1601 | EXPORT_SYMBOL(xfrm_state_walk_init); | |
1602 | ||
abb81c4f HX |
1603 | void xfrm_state_walk_done(struct xfrm_state_walk *walk) |
1604 | { | |
12a169e7 | 1605 | if (list_empty(&walk->all)) |
5c182458 | 1606 | return; |
5c182458 | 1607 | |
12a169e7 HX |
1608 | spin_lock_bh(&xfrm_state_lock); |
1609 | list_del(&walk->all); | |
7d0b591c | 1610 | spin_unlock_bh(&xfrm_state_lock); |
abb81c4f HX |
1611 | } |
1612 | EXPORT_SYMBOL(xfrm_state_walk_done); | |
1613 | ||
f8cd5488 JHS |
1614 | static void xfrm_replay_timer_handler(unsigned long data) |
1615 | { | |
1616 | struct xfrm_state *x = (struct xfrm_state*)data; | |
1617 | ||
1618 | spin_lock(&x->lock); | |
1619 | ||
2717096a | 1620 | if (x->km.state == XFRM_STATE_VALID) { |
a6483b79 | 1621 | if (xfrm_aevent_is_on(xs_net(x))) |
9fdc4883 | 1622 | x->repl->notify(x, XFRM_REPLAY_TIMEOUT); |
2717096a JHS |
1623 | else |
1624 | x->xflags |= XFRM_TIME_DEFER; | |
1625 | } | |
f8cd5488 JHS |
1626 | |
1627 | spin_unlock(&x->lock); | |
1628 | } | |
1629 | ||
df01812e | 1630 | static LIST_HEAD(xfrm_km_list); |
1da177e4 | 1631 | |
214e005b | 1632 | void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
1da177e4 LT |
1633 | { |
1634 | struct xfrm_mgr *km; | |
1635 | ||
85168c00 CW |
1636 | rcu_read_lock(); |
1637 | list_for_each_entry_rcu(km, &xfrm_km_list, list) | |
26b15dad JHS |
1638 | if (km->notify_policy) |
1639 | km->notify_policy(xp, dir, c); | |
85168c00 | 1640 | rcu_read_unlock(); |
26b15dad | 1641 | } |
1da177e4 | 1642 | |
214e005b | 1643 | void km_state_notify(struct xfrm_state *x, const struct km_event *c) |
26b15dad JHS |
1644 | { |
1645 | struct xfrm_mgr *km; | |
85168c00 CW |
1646 | rcu_read_lock(); |
1647 | list_for_each_entry_rcu(km, &xfrm_km_list, list) | |
26b15dad JHS |
1648 | if (km->notify) |
1649 | km->notify(x, c); | |
85168c00 | 1650 | rcu_read_unlock(); |
26b15dad JHS |
1651 | } |
1652 | ||
1653 | EXPORT_SYMBOL(km_policy_notify); | |
1654 | EXPORT_SYMBOL(km_state_notify); | |
1655 | ||
15e47304 | 1656 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid) |
26b15dad | 1657 | { |
98806f75 | 1658 | struct net *net = xs_net(x); |
26b15dad JHS |
1659 | struct km_event c; |
1660 | ||
bf08867f | 1661 | c.data.hard = hard; |
15e47304 | 1662 | c.portid = portid; |
f60f6b8f | 1663 | c.event = XFRM_MSG_EXPIRE; |
26b15dad | 1664 | km_state_notify(x, &c); |
1da177e4 LT |
1665 | |
1666 | if (hard) | |
98806f75 | 1667 | wake_up(&net->xfrm.km_waitq); |
1da177e4 LT |
1668 | } |
1669 | ||
53bc6b4d | 1670 | EXPORT_SYMBOL(km_state_expired); |
26b15dad JHS |
1671 | /* |
1672 | * We send to all registered managers regardless of failure | |
1673 | * We are happy with one success | |
1674 | */ | |
980ebd25 | 1675 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol) |
1da177e4 | 1676 | { |
26b15dad | 1677 | int err = -EINVAL, acqret; |
1da177e4 LT |
1678 | struct xfrm_mgr *km; |
1679 | ||
85168c00 CW |
1680 | rcu_read_lock(); |
1681 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
65e0736b | 1682 | acqret = km->acquire(x, t, pol); |
26b15dad JHS |
1683 | if (!acqret) |
1684 | err = acqret; | |
1da177e4 | 1685 | } |
85168c00 | 1686 | rcu_read_unlock(); |
1da177e4 LT |
1687 | return err; |
1688 | } | |
980ebd25 | 1689 | EXPORT_SYMBOL(km_query); |
1da177e4 | 1690 | |
5d36b180 | 1691 | int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) |
1da177e4 LT |
1692 | { |
1693 | int err = -EINVAL; | |
1694 | struct xfrm_mgr *km; | |
1695 | ||
85168c00 CW |
1696 | rcu_read_lock(); |
1697 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
1da177e4 LT |
1698 | if (km->new_mapping) |
1699 | err = km->new_mapping(x, ipaddr, sport); | |
1700 | if (!err) | |
1701 | break; | |
1702 | } | |
85168c00 | 1703 | rcu_read_unlock(); |
1da177e4 LT |
1704 | return err; |
1705 | } | |
1706 | EXPORT_SYMBOL(km_new_mapping); | |
1707 | ||
15e47304 | 1708 | void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid) |
1da177e4 | 1709 | { |
98806f75 | 1710 | struct net *net = xp_net(pol); |
26b15dad | 1711 | struct km_event c; |
1da177e4 | 1712 | |
bf08867f | 1713 | c.data.hard = hard; |
15e47304 | 1714 | c.portid = portid; |
f60f6b8f | 1715 | c.event = XFRM_MSG_POLEXPIRE; |
26b15dad | 1716 | km_policy_notify(pol, dir, &c); |
1da177e4 LT |
1717 | |
1718 | if (hard) | |
98806f75 | 1719 | wake_up(&net->xfrm.km_waitq); |
1da177e4 | 1720 | } |
a70fcb0b | 1721 | EXPORT_SYMBOL(km_policy_expired); |
1da177e4 | 1722 | |
2d60abc2 | 1723 | #ifdef CONFIG_XFRM_MIGRATE |
183cad12 DM |
1724 | int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1725 | const struct xfrm_migrate *m, int num_migrate, | |
1726 | const struct xfrm_kmaddress *k) | |
80c9abaa SS |
1727 | { |
1728 | int err = -EINVAL; | |
1729 | int ret; | |
1730 | struct xfrm_mgr *km; | |
1731 | ||
85168c00 CW |
1732 | rcu_read_lock(); |
1733 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
80c9abaa | 1734 | if (km->migrate) { |
13c1d189 | 1735 | ret = km->migrate(sel, dir, type, m, num_migrate, k); |
80c9abaa SS |
1736 | if (!ret) |
1737 | err = ret; | |
1738 | } | |
1739 | } | |
85168c00 | 1740 | rcu_read_unlock(); |
80c9abaa SS |
1741 | return err; |
1742 | } | |
1743 | EXPORT_SYMBOL(km_migrate); | |
2d60abc2 | 1744 | #endif |
80c9abaa | 1745 | |
db983c11 | 1746 | int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr) |
97a64b45 MN |
1747 | { |
1748 | int err = -EINVAL; | |
1749 | int ret; | |
1750 | struct xfrm_mgr *km; | |
1751 | ||
85168c00 CW |
1752 | rcu_read_lock(); |
1753 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
97a64b45 | 1754 | if (km->report) { |
db983c11 | 1755 | ret = km->report(net, proto, sel, addr); |
97a64b45 MN |
1756 | if (!ret) |
1757 | err = ret; | |
1758 | } | |
1759 | } | |
85168c00 | 1760 | rcu_read_unlock(); |
97a64b45 MN |
1761 | return err; |
1762 | } | |
1763 | EXPORT_SYMBOL(km_report); | |
1764 | ||
1da177e4 LT |
1765 | int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) |
1766 | { | |
1767 | int err; | |
1768 | u8 *data; | |
1769 | struct xfrm_mgr *km; | |
1770 | struct xfrm_policy *pol = NULL; | |
1771 | ||
1772 | if (optlen <= 0 || optlen > PAGE_SIZE) | |
1773 | return -EMSGSIZE; | |
1774 | ||
1775 | data = kmalloc(optlen, GFP_KERNEL); | |
1776 | if (!data) | |
1777 | return -ENOMEM; | |
1778 | ||
1779 | err = -EFAULT; | |
1780 | if (copy_from_user(data, optval, optlen)) | |
1781 | goto out; | |
1782 | ||
1783 | err = -EINVAL; | |
85168c00 CW |
1784 | rcu_read_lock(); |
1785 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
cb969f07 | 1786 | pol = km->compile_policy(sk, optname, data, |
1da177e4 LT |
1787 | optlen, &err); |
1788 | if (err >= 0) | |
1789 | break; | |
1790 | } | |
85168c00 | 1791 | rcu_read_unlock(); |
1da177e4 LT |
1792 | |
1793 | if (err >= 0) { | |
1794 | xfrm_sk_policy_insert(sk, err, pol); | |
1795 | xfrm_pol_put(pol); | |
1796 | err = 0; | |
1797 | } | |
1798 | ||
1799 | out: | |
1800 | kfree(data); | |
1801 | return err; | |
1802 | } | |
1803 | EXPORT_SYMBOL(xfrm_user_policy); | |
1804 | ||
85168c00 CW |
1805 | static DEFINE_SPINLOCK(xfrm_km_lock); |
1806 | ||
1da177e4 LT |
1807 | int xfrm_register_km(struct xfrm_mgr *km) |
1808 | { | |
85168c00 CW |
1809 | spin_lock_bh(&xfrm_km_lock); |
1810 | list_add_tail_rcu(&km->list, &xfrm_km_list); | |
1811 | spin_unlock_bh(&xfrm_km_lock); | |
1da177e4 LT |
1812 | return 0; |
1813 | } | |
1814 | EXPORT_SYMBOL(xfrm_register_km); | |
1815 | ||
1816 | int xfrm_unregister_km(struct xfrm_mgr *km) | |
1817 | { | |
85168c00 CW |
1818 | spin_lock_bh(&xfrm_km_lock); |
1819 | list_del_rcu(&km->list); | |
1820 | spin_unlock_bh(&xfrm_km_lock); | |
1821 | synchronize_rcu(); | |
1da177e4 LT |
1822 | return 0; |
1823 | } | |
1824 | EXPORT_SYMBOL(xfrm_unregister_km); | |
1825 | ||
1826 | int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo) | |
1827 | { | |
1828 | int err = 0; | |
1829 | if (unlikely(afinfo == NULL)) | |
1830 | return -EINVAL; | |
1831 | if (unlikely(afinfo->family >= NPROTO)) | |
1832 | return -EAFNOSUPPORT; | |
44abdc30 | 1833 | spin_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1834 | if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL)) |
1835 | err = -ENOBUFS; | |
edcd5821 | 1836 | else |
44abdc30 CW |
1837 | rcu_assign_pointer(xfrm_state_afinfo[afinfo->family], afinfo); |
1838 | spin_unlock_bh(&xfrm_state_afinfo_lock); | |
1da177e4 LT |
1839 | return err; |
1840 | } | |
1841 | EXPORT_SYMBOL(xfrm_state_register_afinfo); | |
1842 | ||
1843 | int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo) | |
1844 | { | |
1845 | int err = 0; | |
1846 | if (unlikely(afinfo == NULL)) | |
1847 | return -EINVAL; | |
1848 | if (unlikely(afinfo->family >= NPROTO)) | |
1849 | return -EAFNOSUPPORT; | |
44abdc30 | 1850 | spin_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1851 | if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) { |
1852 | if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo)) | |
1853 | err = -EINVAL; | |
edcd5821 | 1854 | else |
44abdc30 | 1855 | RCU_INIT_POINTER(xfrm_state_afinfo[afinfo->family], NULL); |
1da177e4 | 1856 | } |
44abdc30 CW |
1857 | spin_unlock_bh(&xfrm_state_afinfo_lock); |
1858 | synchronize_rcu(); | |
1da177e4 LT |
1859 | return err; |
1860 | } | |
1861 | EXPORT_SYMBOL(xfrm_state_unregister_afinfo); | |
1862 | ||
628e341f | 1863 | struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family) |
1da177e4 LT |
1864 | { |
1865 | struct xfrm_state_afinfo *afinfo; | |
1866 | if (unlikely(family >= NPROTO)) | |
1867 | return NULL; | |
44abdc30 CW |
1868 | rcu_read_lock(); |
1869 | afinfo = rcu_dereference(xfrm_state_afinfo[family]); | |
546be240 | 1870 | if (unlikely(!afinfo)) |
44abdc30 | 1871 | rcu_read_unlock(); |
1da177e4 LT |
1872 | return afinfo; |
1873 | } | |
1874 | ||
628e341f | 1875 | void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo) |
1da177e4 | 1876 | { |
44abdc30 | 1877 | rcu_read_unlock(); |
1da177e4 LT |
1878 | } |
1879 | ||
1880 | /* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */ | |
1881 | void xfrm_state_delete_tunnel(struct xfrm_state *x) | |
1882 | { | |
1883 | if (x->tunnel) { | |
1884 | struct xfrm_state *t = x->tunnel; | |
1885 | ||
1886 | if (atomic_read(&t->tunnel_users) == 2) | |
1887 | xfrm_state_delete(t); | |
1888 | atomic_dec(&t->tunnel_users); | |
1889 | xfrm_state_put(t); | |
1890 | x->tunnel = NULL; | |
1891 | } | |
1892 | } | |
1893 | EXPORT_SYMBOL(xfrm_state_delete_tunnel); | |
1894 | ||
1895 | int xfrm_state_mtu(struct xfrm_state *x, int mtu) | |
1896 | { | |
c5c25238 | 1897 | int res; |
1da177e4 | 1898 | |
c5c25238 PM |
1899 | spin_lock_bh(&x->lock); |
1900 | if (x->km.state == XFRM_STATE_VALID && | |
1901 | x->type && x->type->get_mtu) | |
1902 | res = x->type->get_mtu(x, mtu); | |
1903 | else | |
28121617 | 1904 | res = mtu - x->props.header_len; |
c5c25238 | 1905 | spin_unlock_bh(&x->lock); |
1da177e4 LT |
1906 | return res; |
1907 | } | |
1908 | ||
a454f0cc | 1909 | int __xfrm_init_state(struct xfrm_state *x, bool init_replay) |
72cb6962 | 1910 | { |
d094cd83 | 1911 | struct xfrm_state_afinfo *afinfo; |
df9dcb45 | 1912 | struct xfrm_mode *inner_mode; |
d094cd83 | 1913 | int family = x->props.family; |
72cb6962 HX |
1914 | int err; |
1915 | ||
d094cd83 HX |
1916 | err = -EAFNOSUPPORT; |
1917 | afinfo = xfrm_state_get_afinfo(family); | |
1918 | if (!afinfo) | |
1919 | goto error; | |
1920 | ||
1921 | err = 0; | |
1922 | if (afinfo->init_flags) | |
1923 | err = afinfo->init_flags(x); | |
1924 | ||
1925 | xfrm_state_put_afinfo(afinfo); | |
1926 | ||
1927 | if (err) | |
1928 | goto error; | |
1929 | ||
1930 | err = -EPROTONOSUPPORT; | |
13996378 | 1931 | |
df9dcb45 KM |
1932 | if (x->sel.family != AF_UNSPEC) { |
1933 | inner_mode = xfrm_get_mode(x->props.mode, x->sel.family); | |
1934 | if (inner_mode == NULL) | |
1935 | goto error; | |
1936 | ||
1937 | if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) && | |
1938 | family != x->sel.family) { | |
1939 | xfrm_put_mode(inner_mode); | |
1940 | goto error; | |
1941 | } | |
1942 | ||
1943 | x->inner_mode = inner_mode; | |
1944 | } else { | |
1945 | struct xfrm_mode *inner_mode_iaf; | |
d81d2285 | 1946 | int iafamily = AF_INET; |
df9dcb45 | 1947 | |
d81d2285 | 1948 | inner_mode = xfrm_get_mode(x->props.mode, x->props.family); |
df9dcb45 KM |
1949 | if (inner_mode == NULL) |
1950 | goto error; | |
1951 | ||
1952 | if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) { | |
1953 | xfrm_put_mode(inner_mode); | |
1954 | goto error; | |
1955 | } | |
d81d2285 | 1956 | x->inner_mode = inner_mode; |
df9dcb45 | 1957 | |
d81d2285 MW |
1958 | if (x->props.family == AF_INET) |
1959 | iafamily = AF_INET6; | |
df9dcb45 | 1960 | |
d81d2285 MW |
1961 | inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily); |
1962 | if (inner_mode_iaf) { | |
1963 | if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL) | |
1964 | x->inner_mode_iaf = inner_mode_iaf; | |
1965 | else | |
1966 | xfrm_put_mode(inner_mode_iaf); | |
df9dcb45 KM |
1967 | } |
1968 | } | |
13996378 | 1969 | |
d094cd83 | 1970 | x->type = xfrm_get_type(x->id.proto, family); |
72cb6962 HX |
1971 | if (x->type == NULL) |
1972 | goto error; | |
1973 | ||
1974 | err = x->type->init_state(x); | |
1975 | if (err) | |
1976 | goto error; | |
1977 | ||
13996378 | 1978 | x->outer_mode = xfrm_get_mode(x->props.mode, family); |
599901c3 JL |
1979 | if (x->outer_mode == NULL) { |
1980 | err = -EPROTONOSUPPORT; | |
b59f45d0 | 1981 | goto error; |
599901c3 | 1982 | } |
b59f45d0 | 1983 | |
a454f0cc WY |
1984 | if (init_replay) { |
1985 | err = xfrm_init_replay(x); | |
1986 | if (err) | |
1987 | goto error; | |
1988 | } | |
1989 | ||
72cb6962 HX |
1990 | x->km.state = XFRM_STATE_VALID; |
1991 | ||
1992 | error: | |
1993 | return err; | |
1994 | } | |
1995 | ||
a454f0cc WY |
1996 | EXPORT_SYMBOL(__xfrm_init_state); |
1997 | ||
1998 | int xfrm_init_state(struct xfrm_state *x) | |
1999 | { | |
2000 | return __xfrm_init_state(x, true); | |
2001 | } | |
2002 | ||
72cb6962 | 2003 | EXPORT_SYMBOL(xfrm_init_state); |
a716c119 | 2004 | |
d62ddc21 | 2005 | int __net_init xfrm_state_init(struct net *net) |
1da177e4 | 2006 | { |
f034b5d4 DM |
2007 | unsigned int sz; |
2008 | ||
9d4139c7 AD |
2009 | INIT_LIST_HEAD(&net->xfrm.state_all); |
2010 | ||
f034b5d4 DM |
2011 | sz = sizeof(struct hlist_head) * 8; |
2012 | ||
73d189dc AD |
2013 | net->xfrm.state_bydst = xfrm_hash_alloc(sz); |
2014 | if (!net->xfrm.state_bydst) | |
2015 | goto out_bydst; | |
d320bbb3 AD |
2016 | net->xfrm.state_bysrc = xfrm_hash_alloc(sz); |
2017 | if (!net->xfrm.state_bysrc) | |
2018 | goto out_bysrc; | |
b754a4fd AD |
2019 | net->xfrm.state_byspi = xfrm_hash_alloc(sz); |
2020 | if (!net->xfrm.state_byspi) | |
2021 | goto out_byspi; | |
529983ec | 2022 | net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1); |
1da177e4 | 2023 | |
0bf7c5b0 | 2024 | net->xfrm.state_num = 0; |
63082733 | 2025 | INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize); |
b8a0ae20 | 2026 | INIT_HLIST_HEAD(&net->xfrm.state_gc_list); |
c7837144 | 2027 | INIT_WORK(&net->xfrm.state_gc_work, xfrm_state_gc_task); |
50a30657 | 2028 | init_waitqueue_head(&net->xfrm.km_waitq); |
d62ddc21 | 2029 | return 0; |
73d189dc | 2030 | |
b754a4fd AD |
2031 | out_byspi: |
2032 | xfrm_hash_free(net->xfrm.state_bysrc, sz); | |
d320bbb3 AD |
2033 | out_bysrc: |
2034 | xfrm_hash_free(net->xfrm.state_bydst, sz); | |
73d189dc AD |
2035 | out_bydst: |
2036 | return -ENOMEM; | |
d62ddc21 AD |
2037 | } |
2038 | ||
2039 | void xfrm_state_fini(struct net *net) | |
2040 | { | |
7c2776ee | 2041 | struct xfrm_audit audit_info; |
73d189dc AD |
2042 | unsigned int sz; |
2043 | ||
7c2776ee | 2044 | flush_work(&net->xfrm.state_hash_work); |
e1760bd5 | 2045 | audit_info.loginuid = INVALID_UID; |
7c2776ee AD |
2046 | audit_info.sessionid = -1; |
2047 | audit_info.secid = 0; | |
2048 | xfrm_state_flush(net, IPSEC_PROTO_ANY, &audit_info); | |
2049 | flush_work(&net->xfrm.state_gc_work); | |
2050 | ||
9d4139c7 | 2051 | WARN_ON(!list_empty(&net->xfrm.state_all)); |
73d189dc | 2052 | |
529983ec | 2053 | sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head); |
b754a4fd AD |
2054 | WARN_ON(!hlist_empty(net->xfrm.state_byspi)); |
2055 | xfrm_hash_free(net->xfrm.state_byspi, sz); | |
d320bbb3 AD |
2056 | WARN_ON(!hlist_empty(net->xfrm.state_bysrc)); |
2057 | xfrm_hash_free(net->xfrm.state_bysrc, sz); | |
73d189dc AD |
2058 | WARN_ON(!hlist_empty(net->xfrm.state_bydst)); |
2059 | xfrm_hash_free(net->xfrm.state_bydst, sz); | |
1da177e4 LT |
2060 | } |
2061 | ||
ab5f5e8b | 2062 | #ifdef CONFIG_AUDITSYSCALL |
cf35f43e IJ |
2063 | static void xfrm_audit_helper_sainfo(struct xfrm_state *x, |
2064 | struct audit_buffer *audit_buf) | |
ab5f5e8b | 2065 | { |
68277acc PM |
2066 | struct xfrm_sec_ctx *ctx = x->security; |
2067 | u32 spi = ntohl(x->id.spi); | |
2068 | ||
2069 | if (ctx) | |
ab5f5e8b | 2070 | audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s", |
68277acc | 2071 | ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str); |
ab5f5e8b JL |
2072 | |
2073 | switch(x->props.family) { | |
2074 | case AF_INET: | |
21454aaa HH |
2075 | audit_log_format(audit_buf, " src=%pI4 dst=%pI4", |
2076 | &x->props.saddr.a4, &x->id.daddr.a4); | |
ab5f5e8b JL |
2077 | break; |
2078 | case AF_INET6: | |
5b095d98 | 2079 | audit_log_format(audit_buf, " src=%pI6 dst=%pI6", |
fdb46ee7 | 2080 | x->props.saddr.a6, x->id.daddr.a6); |
ab5f5e8b JL |
2081 | break; |
2082 | } | |
68277acc PM |
2083 | |
2084 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
ab5f5e8b JL |
2085 | } |
2086 | ||
cf35f43e IJ |
2087 | static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family, |
2088 | struct audit_buffer *audit_buf) | |
afeb14b4 | 2089 | { |
b71d1d42 ED |
2090 | const struct iphdr *iph4; |
2091 | const struct ipv6hdr *iph6; | |
afeb14b4 PM |
2092 | |
2093 | switch (family) { | |
2094 | case AF_INET: | |
2095 | iph4 = ip_hdr(skb); | |
21454aaa HH |
2096 | audit_log_format(audit_buf, " src=%pI4 dst=%pI4", |
2097 | &iph4->saddr, &iph4->daddr); | |
afeb14b4 PM |
2098 | break; |
2099 | case AF_INET6: | |
2100 | iph6 = ipv6_hdr(skb); | |
2101 | audit_log_format(audit_buf, | |
5b095d98 | 2102 | " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x", |
fdb46ee7 | 2103 | &iph6->saddr,&iph6->daddr, |
afeb14b4 PM |
2104 | iph6->flow_lbl[0] & 0x0f, |
2105 | iph6->flow_lbl[1], | |
2106 | iph6->flow_lbl[2]); | |
2107 | break; | |
2108 | } | |
2109 | } | |
2110 | ||
68277acc | 2111 | void xfrm_audit_state_add(struct xfrm_state *x, int result, |
e1760bd5 | 2112 | kuid_t auid, u32 sessionid, u32 secid) |
ab5f5e8b JL |
2113 | { |
2114 | struct audit_buffer *audit_buf; | |
ab5f5e8b | 2115 | |
afeb14b4 | 2116 | audit_buf = xfrm_audit_start("SAD-add"); |
ab5f5e8b JL |
2117 | if (audit_buf == NULL) |
2118 | return; | |
2532386f | 2119 | xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf); |
afeb14b4 PM |
2120 | xfrm_audit_helper_sainfo(x, audit_buf); |
2121 | audit_log_format(audit_buf, " res=%u", result); | |
ab5f5e8b JL |
2122 | audit_log_end(audit_buf); |
2123 | } | |
2124 | EXPORT_SYMBOL_GPL(xfrm_audit_state_add); | |
2125 | ||
68277acc | 2126 | void xfrm_audit_state_delete(struct xfrm_state *x, int result, |
e1760bd5 | 2127 | kuid_t auid, u32 sessionid, u32 secid) |
ab5f5e8b JL |
2128 | { |
2129 | struct audit_buffer *audit_buf; | |
ab5f5e8b | 2130 | |
afeb14b4 | 2131 | audit_buf = xfrm_audit_start("SAD-delete"); |
ab5f5e8b JL |
2132 | if (audit_buf == NULL) |
2133 | return; | |
2532386f | 2134 | xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf); |
afeb14b4 PM |
2135 | xfrm_audit_helper_sainfo(x, audit_buf); |
2136 | audit_log_format(audit_buf, " res=%u", result); | |
ab5f5e8b JL |
2137 | audit_log_end(audit_buf); |
2138 | } | |
2139 | EXPORT_SYMBOL_GPL(xfrm_audit_state_delete); | |
afeb14b4 PM |
2140 | |
2141 | void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
2142 | struct sk_buff *skb) | |
2143 | { | |
2144 | struct audit_buffer *audit_buf; | |
2145 | u32 spi; | |
2146 | ||
2147 | audit_buf = xfrm_audit_start("SA-replay-overflow"); | |
2148 | if (audit_buf == NULL) | |
2149 | return; | |
2150 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2151 | /* don't record the sequence number because it's inherent in this kind | |
2152 | * of audit message */ | |
2153 | spi = ntohl(x->id.spi); | |
2154 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
2155 | audit_log_end(audit_buf); | |
2156 | } | |
2157 | EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow); | |
2158 | ||
9fdc4883 | 2159 | void xfrm_audit_state_replay(struct xfrm_state *x, |
afeb14b4 PM |
2160 | struct sk_buff *skb, __be32 net_seq) |
2161 | { | |
2162 | struct audit_buffer *audit_buf; | |
2163 | u32 spi; | |
2164 | ||
2165 | audit_buf = xfrm_audit_start("SA-replayed-pkt"); | |
2166 | if (audit_buf == NULL) | |
2167 | return; | |
2168 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2169 | spi = ntohl(x->id.spi); | |
2170 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2171 | spi, spi, ntohl(net_seq)); | |
2172 | audit_log_end(audit_buf); | |
2173 | } | |
9fdc4883 | 2174 | EXPORT_SYMBOL_GPL(xfrm_audit_state_replay); |
afeb14b4 PM |
2175 | |
2176 | void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family) | |
2177 | { | |
2178 | struct audit_buffer *audit_buf; | |
2179 | ||
2180 | audit_buf = xfrm_audit_start("SA-notfound"); | |
2181 | if (audit_buf == NULL) | |
2182 | return; | |
2183 | xfrm_audit_helper_pktinfo(skb, family, audit_buf); | |
2184 | audit_log_end(audit_buf); | |
2185 | } | |
2186 | EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple); | |
2187 | ||
2188 | void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
2189 | __be32 net_spi, __be32 net_seq) | |
2190 | { | |
2191 | struct audit_buffer *audit_buf; | |
2192 | u32 spi; | |
2193 | ||
2194 | audit_buf = xfrm_audit_start("SA-notfound"); | |
2195 | if (audit_buf == NULL) | |
2196 | return; | |
2197 | xfrm_audit_helper_pktinfo(skb, family, audit_buf); | |
2198 | spi = ntohl(net_spi); | |
2199 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2200 | spi, spi, ntohl(net_seq)); | |
2201 | audit_log_end(audit_buf); | |
2202 | } | |
2203 | EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound); | |
2204 | ||
2205 | void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
2206 | struct sk_buff *skb, u8 proto) | |
2207 | { | |
2208 | struct audit_buffer *audit_buf; | |
2209 | __be32 net_spi; | |
2210 | __be32 net_seq; | |
2211 | ||
2212 | audit_buf = xfrm_audit_start("SA-icv-failure"); | |
2213 | if (audit_buf == NULL) | |
2214 | return; | |
2215 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2216 | if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) { | |
2217 | u32 spi = ntohl(net_spi); | |
2218 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2219 | spi, spi, ntohl(net_seq)); | |
2220 | } | |
2221 | audit_log_end(audit_buf); | |
2222 | } | |
2223 | EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail); | |
ab5f5e8b | 2224 | #endif /* CONFIG_AUDITSYSCALL */ |