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Commit | Line | Data |
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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 | ||
f034b5d4 | 38 | static unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024; |
f034b5d4 | 39 | |
64d0cd00 | 40 | static inline unsigned int xfrm_dst_hash(struct net *net, |
2ab38503 DM |
41 | const xfrm_address_t *daddr, |
42 | const xfrm_address_t *saddr, | |
c1969f29 | 43 | u32 reqid, |
a624c108 | 44 | unsigned short family) |
f034b5d4 | 45 | { |
64d0cd00 | 46 | return __xfrm_dst_hash(daddr, saddr, reqid, family, net->xfrm.state_hmask); |
f034b5d4 DM |
47 | } |
48 | ||
64d0cd00 | 49 | static inline unsigned int xfrm_src_hash(struct net *net, |
2ab38503 DM |
50 | const xfrm_address_t *daddr, |
51 | const xfrm_address_t *saddr, | |
44e36b42 | 52 | unsigned short family) |
f034b5d4 | 53 | { |
64d0cd00 | 54 | return __xfrm_src_hash(daddr, saddr, family, net->xfrm.state_hmask); |
f034b5d4 DM |
55 | } |
56 | ||
f034b5d4 | 57 | static inline unsigned int |
2ab38503 DM |
58 | xfrm_spi_hash(struct net *net, const xfrm_address_t *daddr, |
59 | __be32 spi, u8 proto, unsigned short family) | |
f034b5d4 | 60 | { |
64d0cd00 | 61 | return __xfrm_spi_hash(daddr, spi, proto, family, net->xfrm.state_hmask); |
f034b5d4 DM |
62 | } |
63 | ||
f034b5d4 DM |
64 | static void xfrm_hash_transfer(struct hlist_head *list, |
65 | struct hlist_head *ndsttable, | |
66 | struct hlist_head *nsrctable, | |
67 | struct hlist_head *nspitable, | |
68 | unsigned int nhashmask) | |
69 | { | |
b67bfe0d | 70 | struct hlist_node *tmp; |
f034b5d4 DM |
71 | struct xfrm_state *x; |
72 | ||
b67bfe0d | 73 | hlist_for_each_entry_safe(x, tmp, list, bydst) { |
f034b5d4 DM |
74 | unsigned int h; |
75 | ||
c1969f29 DM |
76 | h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr, |
77 | x->props.reqid, x->props.family, | |
78 | nhashmask); | |
f034b5d4 DM |
79 | hlist_add_head(&x->bydst, ndsttable+h); |
80 | ||
667bbcb6 MN |
81 | h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr, |
82 | x->props.family, | |
f034b5d4 DM |
83 | nhashmask); |
84 | hlist_add_head(&x->bysrc, nsrctable+h); | |
85 | ||
7b4dc360 MN |
86 | if (x->id.spi) { |
87 | h = __xfrm_spi_hash(&x->id.daddr, x->id.spi, | |
88 | x->id.proto, x->props.family, | |
89 | nhashmask); | |
90 | hlist_add_head(&x->byspi, nspitable+h); | |
91 | } | |
f034b5d4 DM |
92 | } |
93 | } | |
94 | ||
63082733 | 95 | static unsigned long xfrm_hash_new_size(unsigned int state_hmask) |
f034b5d4 | 96 | { |
63082733 | 97 | return ((state_hmask + 1) << 1) * sizeof(struct hlist_head); |
f034b5d4 DM |
98 | } |
99 | ||
63082733 | 100 | static void xfrm_hash_resize(struct work_struct *work) |
f034b5d4 | 101 | { |
63082733 | 102 | struct net *net = container_of(work, struct net, xfrm.state_hash_work); |
f034b5d4 DM |
103 | struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi; |
104 | unsigned long nsize, osize; | |
105 | unsigned int nhashmask, ohashmask; | |
106 | int i; | |
107 | ||
63082733 | 108 | nsize = xfrm_hash_new_size(net->xfrm.state_hmask); |
44e36b42 | 109 | ndst = xfrm_hash_alloc(nsize); |
f034b5d4 | 110 | if (!ndst) |
0244790c | 111 | return; |
44e36b42 | 112 | nsrc = xfrm_hash_alloc(nsize); |
f034b5d4 | 113 | if (!nsrc) { |
44e36b42 | 114 | xfrm_hash_free(ndst, nsize); |
0244790c | 115 | return; |
f034b5d4 | 116 | } |
44e36b42 | 117 | nspi = xfrm_hash_alloc(nsize); |
f034b5d4 | 118 | if (!nspi) { |
44e36b42 DM |
119 | xfrm_hash_free(ndst, nsize); |
120 | xfrm_hash_free(nsrc, nsize); | |
0244790c | 121 | return; |
f034b5d4 DM |
122 | } |
123 | ||
283bc9f3 | 124 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
f034b5d4 DM |
125 | |
126 | nhashmask = (nsize / sizeof(struct hlist_head)) - 1U; | |
63082733 AD |
127 | for (i = net->xfrm.state_hmask; i >= 0; i--) |
128 | xfrm_hash_transfer(net->xfrm.state_bydst+i, ndst, nsrc, nspi, | |
f034b5d4 DM |
129 | nhashmask); |
130 | ||
63082733 AD |
131 | odst = net->xfrm.state_bydst; |
132 | osrc = net->xfrm.state_bysrc; | |
133 | ospi = net->xfrm.state_byspi; | |
134 | ohashmask = net->xfrm.state_hmask; | |
f034b5d4 | 135 | |
63082733 AD |
136 | net->xfrm.state_bydst = ndst; |
137 | net->xfrm.state_bysrc = nsrc; | |
138 | net->xfrm.state_byspi = nspi; | |
139 | net->xfrm.state_hmask = nhashmask; | |
f034b5d4 | 140 | |
283bc9f3 | 141 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
f034b5d4 DM |
142 | |
143 | osize = (ohashmask + 1) * sizeof(struct hlist_head); | |
44e36b42 DM |
144 | xfrm_hash_free(odst, osize); |
145 | xfrm_hash_free(osrc, osize); | |
146 | xfrm_hash_free(ospi, osize); | |
f034b5d4 DM |
147 | } |
148 | ||
44abdc30 CW |
149 | static DEFINE_SPINLOCK(xfrm_state_afinfo_lock); |
150 | static struct xfrm_state_afinfo __rcu *xfrm_state_afinfo[NPROTO]; | |
1da177e4 | 151 | |
1da177e4 LT |
152 | static DEFINE_SPINLOCK(xfrm_state_gc_lock); |
153 | ||
53bc6b4d | 154 | int __xfrm_state_delete(struct xfrm_state *x); |
1da177e4 | 155 | |
980ebd25 | 156 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); |
0f24558e | 157 | bool km_is_alive(const struct km_event *c); |
15e47304 | 158 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid); |
1da177e4 | 159 | |
7a9885b9 | 160 | static DEFINE_SPINLOCK(xfrm_type_lock); |
533cb5b0 | 161 | int xfrm_register_type(const struct xfrm_type *type, unsigned short family) |
aa5d62cc | 162 | { |
7a9885b9 | 163 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); |
533cb5b0 | 164 | const struct xfrm_type **typemap; |
aa5d62cc HX |
165 | int err = 0; |
166 | ||
167 | if (unlikely(afinfo == NULL)) | |
168 | return -EAFNOSUPPORT; | |
169 | typemap = afinfo->type_map; | |
7a9885b9 | 170 | spin_lock_bh(&xfrm_type_lock); |
aa5d62cc HX |
171 | |
172 | if (likely(typemap[type->proto] == NULL)) | |
173 | typemap[type->proto] = type; | |
174 | else | |
175 | err = -EEXIST; | |
7a9885b9 CW |
176 | spin_unlock_bh(&xfrm_type_lock); |
177 | xfrm_state_put_afinfo(afinfo); | |
aa5d62cc HX |
178 | return err; |
179 | } | |
180 | EXPORT_SYMBOL(xfrm_register_type); | |
181 | ||
533cb5b0 | 182 | int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family) |
aa5d62cc | 183 | { |
7a9885b9 | 184 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); |
533cb5b0 | 185 | const struct xfrm_type **typemap; |
aa5d62cc HX |
186 | int err = 0; |
187 | ||
188 | if (unlikely(afinfo == NULL)) | |
189 | return -EAFNOSUPPORT; | |
190 | typemap = afinfo->type_map; | |
7a9885b9 | 191 | spin_lock_bh(&xfrm_type_lock); |
aa5d62cc HX |
192 | |
193 | if (unlikely(typemap[type->proto] != type)) | |
194 | err = -ENOENT; | |
195 | else | |
196 | typemap[type->proto] = NULL; | |
7a9885b9 CW |
197 | spin_unlock_bh(&xfrm_type_lock); |
198 | xfrm_state_put_afinfo(afinfo); | |
aa5d62cc HX |
199 | return err; |
200 | } | |
201 | EXPORT_SYMBOL(xfrm_unregister_type); | |
202 | ||
533cb5b0 | 203 | static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family) |
aa5d62cc HX |
204 | { |
205 | struct xfrm_state_afinfo *afinfo; | |
533cb5b0 ED |
206 | const struct xfrm_type **typemap; |
207 | const struct xfrm_type *type; | |
aa5d62cc HX |
208 | int modload_attempted = 0; |
209 | ||
210 | retry: | |
211 | afinfo = xfrm_state_get_afinfo(family); | |
212 | if (unlikely(afinfo == NULL)) | |
213 | return NULL; | |
214 | typemap = afinfo->type_map; | |
215 | ||
216 | type = typemap[proto]; | |
217 | if (unlikely(type && !try_module_get(type->owner))) | |
218 | type = NULL; | |
219 | if (!type && !modload_attempted) { | |
220 | xfrm_state_put_afinfo(afinfo); | |
221 | request_module("xfrm-type-%d-%d", family, proto); | |
222 | modload_attempted = 1; | |
223 | goto retry; | |
224 | } | |
225 | ||
226 | xfrm_state_put_afinfo(afinfo); | |
227 | return type; | |
228 | } | |
229 | ||
533cb5b0 | 230 | static void xfrm_put_type(const struct xfrm_type *type) |
aa5d62cc HX |
231 | { |
232 | module_put(type->owner); | |
233 | } | |
234 | ||
7a9885b9 | 235 | static DEFINE_SPINLOCK(xfrm_mode_lock); |
aa5d62cc HX |
236 | int xfrm_register_mode(struct xfrm_mode *mode, int family) |
237 | { | |
238 | struct xfrm_state_afinfo *afinfo; | |
239 | struct xfrm_mode **modemap; | |
240 | int err; | |
241 | ||
242 | if (unlikely(mode->encap >= XFRM_MODE_MAX)) | |
243 | return -EINVAL; | |
244 | ||
7a9885b9 | 245 | afinfo = xfrm_state_get_afinfo(family); |
aa5d62cc HX |
246 | if (unlikely(afinfo == NULL)) |
247 | return -EAFNOSUPPORT; | |
248 | ||
249 | err = -EEXIST; | |
250 | modemap = afinfo->mode_map; | |
7a9885b9 | 251 | spin_lock_bh(&xfrm_mode_lock); |
17c2a42a HX |
252 | if (modemap[mode->encap]) |
253 | goto out; | |
aa5d62cc | 254 | |
17c2a42a HX |
255 | err = -ENOENT; |
256 | if (!try_module_get(afinfo->owner)) | |
257 | goto out; | |
258 | ||
259 | mode->afinfo = afinfo; | |
260 | modemap[mode->encap] = mode; | |
261 | err = 0; | |
262 | ||
263 | out: | |
7a9885b9 CW |
264 | spin_unlock_bh(&xfrm_mode_lock); |
265 | xfrm_state_put_afinfo(afinfo); | |
aa5d62cc HX |
266 | return err; |
267 | } | |
268 | EXPORT_SYMBOL(xfrm_register_mode); | |
269 | ||
270 | int xfrm_unregister_mode(struct xfrm_mode *mode, int family) | |
271 | { | |
272 | struct xfrm_state_afinfo *afinfo; | |
273 | struct xfrm_mode **modemap; | |
274 | int err; | |
275 | ||
276 | if (unlikely(mode->encap >= XFRM_MODE_MAX)) | |
277 | return -EINVAL; | |
278 | ||
7a9885b9 | 279 | afinfo = xfrm_state_get_afinfo(family); |
aa5d62cc HX |
280 | if (unlikely(afinfo == NULL)) |
281 | return -EAFNOSUPPORT; | |
282 | ||
283 | err = -ENOENT; | |
284 | modemap = afinfo->mode_map; | |
7a9885b9 | 285 | spin_lock_bh(&xfrm_mode_lock); |
aa5d62cc HX |
286 | if (likely(modemap[mode->encap] == mode)) { |
287 | modemap[mode->encap] = NULL; | |
17c2a42a | 288 | module_put(mode->afinfo->owner); |
aa5d62cc HX |
289 | err = 0; |
290 | } | |
291 | ||
7a9885b9 CW |
292 | spin_unlock_bh(&xfrm_mode_lock); |
293 | xfrm_state_put_afinfo(afinfo); | |
aa5d62cc HX |
294 | return err; |
295 | } | |
296 | EXPORT_SYMBOL(xfrm_unregister_mode); | |
297 | ||
298 | static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family) | |
299 | { | |
300 | struct xfrm_state_afinfo *afinfo; | |
301 | struct xfrm_mode *mode; | |
302 | int modload_attempted = 0; | |
303 | ||
304 | if (unlikely(encap >= XFRM_MODE_MAX)) | |
305 | return NULL; | |
306 | ||
307 | retry: | |
308 | afinfo = xfrm_state_get_afinfo(family); | |
309 | if (unlikely(afinfo == NULL)) | |
310 | return NULL; | |
311 | ||
312 | mode = afinfo->mode_map[encap]; | |
313 | if (unlikely(mode && !try_module_get(mode->owner))) | |
314 | mode = NULL; | |
315 | if (!mode && !modload_attempted) { | |
316 | xfrm_state_put_afinfo(afinfo); | |
317 | request_module("xfrm-mode-%d-%d", family, encap); | |
318 | modload_attempted = 1; | |
319 | goto retry; | |
320 | } | |
321 | ||
322 | xfrm_state_put_afinfo(afinfo); | |
323 | return mode; | |
324 | } | |
325 | ||
326 | static void xfrm_put_mode(struct xfrm_mode *mode) | |
327 | { | |
328 | module_put(mode->owner); | |
329 | } | |
330 | ||
1da177e4 LT |
331 | static void xfrm_state_gc_destroy(struct xfrm_state *x) |
332 | { | |
9e0d57fd | 333 | tasklet_hrtimer_cancel(&x->mtimer); |
a47f0ce0 | 334 | del_timer_sync(&x->rtimer); |
b5884793 | 335 | kfree(x->aead); |
a51482bd JJ |
336 | kfree(x->aalg); |
337 | kfree(x->ealg); | |
338 | kfree(x->calg); | |
339 | kfree(x->encap); | |
060f02a3 | 340 | kfree(x->coaddr); |
d8647b79 SK |
341 | kfree(x->replay_esn); |
342 | kfree(x->preplay_esn); | |
13996378 HX |
343 | if (x->inner_mode) |
344 | xfrm_put_mode(x->inner_mode); | |
df9dcb45 KM |
345 | if (x->inner_mode_iaf) |
346 | xfrm_put_mode(x->inner_mode_iaf); | |
13996378 HX |
347 | if (x->outer_mode) |
348 | xfrm_put_mode(x->outer_mode); | |
1da177e4 LT |
349 | if (x->type) { |
350 | x->type->destructor(x); | |
351 | xfrm_put_type(x->type); | |
352 | } | |
df71837d | 353 | security_xfrm_state_free(x); |
1da177e4 LT |
354 | kfree(x); |
355 | } | |
356 | ||
c7837144 | 357 | static void xfrm_state_gc_task(struct work_struct *work) |
1da177e4 | 358 | { |
c7837144 | 359 | struct net *net = container_of(work, struct net, xfrm.state_gc_work); |
12a169e7 | 360 | struct xfrm_state *x; |
b67bfe0d | 361 | struct hlist_node *tmp; |
12a169e7 | 362 | struct hlist_head gc_list; |
1da177e4 | 363 | |
1da177e4 | 364 | spin_lock_bh(&xfrm_state_gc_lock); |
c7837144 | 365 | hlist_move_list(&net->xfrm.state_gc_list, &gc_list); |
1da177e4 LT |
366 | spin_unlock_bh(&xfrm_state_gc_lock); |
367 | ||
b67bfe0d | 368 | hlist_for_each_entry_safe(x, tmp, &gc_list, gclist) |
1da177e4 | 369 | xfrm_state_gc_destroy(x); |
1da177e4 LT |
370 | } |
371 | ||
372 | static inline unsigned long make_jiffies(long secs) | |
373 | { | |
374 | if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ) | |
375 | return MAX_SCHEDULE_TIMEOUT-1; | |
376 | else | |
a716c119 | 377 | return secs*HZ; |
1da177e4 LT |
378 | } |
379 | ||
3e94c2dc | 380 | static enum hrtimer_restart xfrm_timer_handler(struct hrtimer *me) |
1da177e4 | 381 | { |
9e0d57fd YP |
382 | struct tasklet_hrtimer *thr = container_of(me, struct tasklet_hrtimer, timer); |
383 | struct xfrm_state *x = container_of(thr, struct xfrm_state, mtimer); | |
9d729f72 | 384 | unsigned long now = get_seconds(); |
1da177e4 LT |
385 | long next = LONG_MAX; |
386 | int warn = 0; | |
161a09e7 | 387 | int err = 0; |
1da177e4 LT |
388 | |
389 | spin_lock(&x->lock); | |
390 | if (x->km.state == XFRM_STATE_DEAD) | |
391 | goto out; | |
392 | if (x->km.state == XFRM_STATE_EXPIRED) | |
393 | goto expired; | |
394 | if (x->lft.hard_add_expires_seconds) { | |
395 | long tmo = x->lft.hard_add_expires_seconds + | |
396 | x->curlft.add_time - now; | |
e3c0d047 FD |
397 | if (tmo <= 0) { |
398 | if (x->xflags & XFRM_SOFT_EXPIRE) { | |
399 | /* enter hard expire without soft expire first?! | |
400 | * setting a new date could trigger this. | |
401 | * workarbound: fix x->curflt.add_time by below: | |
402 | */ | |
403 | x->curlft.add_time = now - x->saved_tmo - 1; | |
404 | tmo = x->lft.hard_add_expires_seconds - x->saved_tmo; | |
405 | } else | |
406 | goto expired; | |
407 | } | |
1da177e4 LT |
408 | if (tmo < next) |
409 | next = tmo; | |
410 | } | |
411 | if (x->lft.hard_use_expires_seconds) { | |
412 | long tmo = x->lft.hard_use_expires_seconds + | |
413 | (x->curlft.use_time ? : now) - now; | |
414 | if (tmo <= 0) | |
415 | goto expired; | |
416 | if (tmo < next) | |
417 | next = tmo; | |
418 | } | |
419 | if (x->km.dying) | |
420 | goto resched; | |
421 | if (x->lft.soft_add_expires_seconds) { | |
422 | long tmo = x->lft.soft_add_expires_seconds + | |
423 | x->curlft.add_time - now; | |
e3c0d047 | 424 | if (tmo <= 0) { |
1da177e4 | 425 | warn = 1; |
e3c0d047 FD |
426 | x->xflags &= ~XFRM_SOFT_EXPIRE; |
427 | } else if (tmo < next) { | |
1da177e4 | 428 | next = tmo; |
e3c0d047 FD |
429 | x->xflags |= XFRM_SOFT_EXPIRE; |
430 | x->saved_tmo = tmo; | |
431 | } | |
1da177e4 LT |
432 | } |
433 | if (x->lft.soft_use_expires_seconds) { | |
434 | long tmo = x->lft.soft_use_expires_seconds + | |
435 | (x->curlft.use_time ? : now) - now; | |
436 | if (tmo <= 0) | |
437 | warn = 1; | |
438 | else if (tmo < next) | |
439 | next = tmo; | |
440 | } | |
441 | ||
4666faab | 442 | x->km.dying = warn; |
1da177e4 | 443 | if (warn) |
53bc6b4d | 444 | km_state_expired(x, 0, 0); |
1da177e4 | 445 | resched: |
9b7a787d | 446 | if (next != LONG_MAX) { |
9e0d57fd YP |
447 | tasklet_hrtimer_start(&x->mtimer, ktime_set(next, 0), HRTIMER_MODE_REL); |
448 | } | |
a47f0ce0 | 449 | |
1da177e4 LT |
450 | goto out; |
451 | ||
452 | expired: | |
5b8ef341 | 453 | if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) |
1da177e4 | 454 | x->km.state = XFRM_STATE_EXPIRED; |
161a09e7 JL |
455 | |
456 | err = __xfrm_state_delete(x); | |
0806ae4c | 457 | if (!err) |
53bc6b4d | 458 | km_state_expired(x, 1, 0); |
1da177e4 | 459 | |
2e71029e | 460 | xfrm_audit_state_delete(x, err ? 0 : 1, true); |
161a09e7 | 461 | |
1da177e4 LT |
462 | out: |
463 | spin_unlock(&x->lock); | |
9e0d57fd | 464 | return HRTIMER_NORESTART; |
1da177e4 LT |
465 | } |
466 | ||
0ac84752 DM |
467 | static void xfrm_replay_timer_handler(unsigned long data); |
468 | ||
673c09be | 469 | struct xfrm_state *xfrm_state_alloc(struct net *net) |
1da177e4 LT |
470 | { |
471 | struct xfrm_state *x; | |
472 | ||
0da974f4 | 473 | x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC); |
1da177e4 LT |
474 | |
475 | if (x) { | |
673c09be | 476 | write_pnet(&x->xs_net, net); |
1da177e4 LT |
477 | atomic_set(&x->refcnt, 1); |
478 | atomic_set(&x->tunnel_users, 0); | |
12a169e7 | 479 | INIT_LIST_HEAD(&x->km.all); |
8f126e37 DM |
480 | INIT_HLIST_NODE(&x->bydst); |
481 | INIT_HLIST_NODE(&x->bysrc); | |
482 | INIT_HLIST_NODE(&x->byspi); | |
99565a6c FD |
483 | tasklet_hrtimer_init(&x->mtimer, xfrm_timer_handler, |
484 | CLOCK_BOOTTIME, HRTIMER_MODE_ABS); | |
b24b8a24 PE |
485 | setup_timer(&x->rtimer, xfrm_replay_timer_handler, |
486 | (unsigned long)x); | |
9d729f72 | 487 | x->curlft.add_time = get_seconds(); |
1da177e4 LT |
488 | x->lft.soft_byte_limit = XFRM_INF; |
489 | x->lft.soft_packet_limit = XFRM_INF; | |
490 | x->lft.hard_byte_limit = XFRM_INF; | |
491 | x->lft.hard_packet_limit = XFRM_INF; | |
f8cd5488 JHS |
492 | x->replay_maxage = 0; |
493 | x->replay_maxdiff = 0; | |
df9dcb45 KM |
494 | x->inner_mode = NULL; |
495 | x->inner_mode_iaf = NULL; | |
1da177e4 LT |
496 | spin_lock_init(&x->lock); |
497 | } | |
498 | return x; | |
499 | } | |
500 | EXPORT_SYMBOL(xfrm_state_alloc); | |
501 | ||
502 | void __xfrm_state_destroy(struct xfrm_state *x) | |
503 | { | |
98806f75 AD |
504 | struct net *net = xs_net(x); |
505 | ||
547b792c | 506 | WARN_ON(x->km.state != XFRM_STATE_DEAD); |
1da177e4 LT |
507 | |
508 | spin_lock_bh(&xfrm_state_gc_lock); | |
98806f75 | 509 | hlist_add_head(&x->gclist, &net->xfrm.state_gc_list); |
1da177e4 | 510 | spin_unlock_bh(&xfrm_state_gc_lock); |
98806f75 | 511 | schedule_work(&net->xfrm.state_gc_work); |
1da177e4 LT |
512 | } |
513 | EXPORT_SYMBOL(__xfrm_state_destroy); | |
514 | ||
53bc6b4d | 515 | int __xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 516 | { |
98806f75 | 517 | struct net *net = xs_net(x); |
26b15dad JHS |
518 | int err = -ESRCH; |
519 | ||
1da177e4 LT |
520 | if (x->km.state != XFRM_STATE_DEAD) { |
521 | x->km.state = XFRM_STATE_DEAD; | |
283bc9f3 | 522 | spin_lock(&net->xfrm.xfrm_state_lock); |
12a169e7 | 523 | list_del(&x->km.all); |
8f126e37 | 524 | hlist_del(&x->bydst); |
8f126e37 | 525 | hlist_del(&x->bysrc); |
a47f0ce0 | 526 | if (x->id.spi) |
8f126e37 | 527 | hlist_del(&x->byspi); |
98806f75 | 528 | net->xfrm.state_num--; |
283bc9f3 | 529 | spin_unlock(&net->xfrm.xfrm_state_lock); |
1da177e4 | 530 | |
1da177e4 LT |
531 | /* All xfrm_state objects are created by xfrm_state_alloc. |
532 | * The xfrm_state_alloc call gives a reference, and that | |
533 | * is what we are dropping here. | |
534 | */ | |
5dba4797 | 535 | xfrm_state_put(x); |
26b15dad | 536 | err = 0; |
1da177e4 | 537 | } |
26b15dad JHS |
538 | |
539 | return err; | |
1da177e4 | 540 | } |
53bc6b4d | 541 | EXPORT_SYMBOL(__xfrm_state_delete); |
1da177e4 | 542 | |
26b15dad | 543 | int xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 544 | { |
26b15dad JHS |
545 | int err; |
546 | ||
1da177e4 | 547 | spin_lock_bh(&x->lock); |
26b15dad | 548 | err = __xfrm_state_delete(x); |
1da177e4 | 549 | spin_unlock_bh(&x->lock); |
26b15dad JHS |
550 | |
551 | return err; | |
1da177e4 LT |
552 | } |
553 | EXPORT_SYMBOL(xfrm_state_delete); | |
554 | ||
4aa2e62c JL |
555 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
556 | static inline int | |
2e71029e | 557 | xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid) |
1da177e4 | 558 | { |
4aa2e62c JL |
559 | int i, err = 0; |
560 | ||
0e602451 | 561 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
4aa2e62c JL |
562 | struct xfrm_state *x; |
563 | ||
b67bfe0d | 564 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
4aa2e62c JL |
565 | if (xfrm_id_proto_match(x->id.proto, proto) && |
566 | (err = security_xfrm_state_delete(x)) != 0) { | |
2e71029e | 567 | xfrm_audit_state_delete(x, 0, task_valid); |
4aa2e62c JL |
568 | return err; |
569 | } | |
570 | } | |
571 | } | |
572 | ||
573 | return err; | |
574 | } | |
575 | #else | |
576 | static inline int | |
2e71029e | 577 | xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid) |
4aa2e62c JL |
578 | { |
579 | return 0; | |
580 | } | |
581 | #endif | |
582 | ||
2e71029e | 583 | int xfrm_state_flush(struct net *net, u8 proto, bool task_valid) |
4aa2e62c | 584 | { |
9e64cc95 | 585 | int i, err = 0, cnt = 0; |
1da177e4 | 586 | |
283bc9f3 | 587 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
2e71029e | 588 | err = xfrm_state_flush_secctx_check(net, proto, task_valid); |
4aa2e62c JL |
589 | if (err) |
590 | goto out; | |
591 | ||
9e64cc95 | 592 | err = -ESRCH; |
0e602451 | 593 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
8f126e37 | 594 | struct xfrm_state *x; |
1da177e4 | 595 | restart: |
b67bfe0d | 596 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
1da177e4 | 597 | if (!xfrm_state_kern(x) && |
5794708f | 598 | xfrm_id_proto_match(x->id.proto, proto)) { |
1da177e4 | 599 | xfrm_state_hold(x); |
283bc9f3 | 600 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 601 | |
161a09e7 | 602 | err = xfrm_state_delete(x); |
ab5f5e8b | 603 | xfrm_audit_state_delete(x, err ? 0 : 1, |
2e71029e | 604 | task_valid); |
1da177e4 | 605 | xfrm_state_put(x); |
9e64cc95 JHS |
606 | if (!err) |
607 | cnt++; | |
1da177e4 | 608 | |
283bc9f3 | 609 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
610 | goto restart; |
611 | } | |
612 | } | |
613 | } | |
9e64cc95 JHS |
614 | if (cnt) |
615 | err = 0; | |
4aa2e62c JL |
616 | |
617 | out: | |
283bc9f3 | 618 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
4aa2e62c | 619 | return err; |
1da177e4 LT |
620 | } |
621 | EXPORT_SYMBOL(xfrm_state_flush); | |
622 | ||
e071041b | 623 | void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si) |
28d8909b | 624 | { |
283bc9f3 | 625 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
e071041b AD |
626 | si->sadcnt = net->xfrm.state_num; |
627 | si->sadhcnt = net->xfrm.state_hmask; | |
28d8909b | 628 | si->sadhmcnt = xfrm_state_hashmax; |
283bc9f3 | 629 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
28d8909b JHS |
630 | } |
631 | EXPORT_SYMBOL(xfrm_sad_getinfo); | |
632 | ||
1da177e4 | 633 | static int |
1a898592 | 634 | xfrm_init_tempstate(struct xfrm_state *x, const struct flowi *fl, |
04686013 | 635 | const struct xfrm_tmpl *tmpl, |
33765d06 | 636 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
8444cf71 | 637 | unsigned short family) |
1da177e4 LT |
638 | { |
639 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
640 | if (!afinfo) | |
641 | return -1; | |
8444cf71 TE |
642 | afinfo->init_tempsel(&x->sel, fl); |
643 | ||
644 | if (family != tmpl->encap_family) { | |
645 | xfrm_state_put_afinfo(afinfo); | |
646 | afinfo = xfrm_state_get_afinfo(tmpl->encap_family); | |
647 | if (!afinfo) | |
648 | return -1; | |
649 | } | |
650 | afinfo->init_temprop(x, tmpl, daddr, saddr); | |
1da177e4 LT |
651 | xfrm_state_put_afinfo(afinfo); |
652 | return 0; | |
653 | } | |
654 | ||
9aa60088 DM |
655 | static struct xfrm_state *__xfrm_state_lookup(struct net *net, u32 mark, |
656 | const xfrm_address_t *daddr, | |
657 | __be32 spi, u8 proto, | |
658 | unsigned short family) | |
edcd5821 | 659 | { |
221df1ed | 660 | unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family); |
edcd5821 DM |
661 | struct xfrm_state *x; |
662 | ||
b67bfe0d | 663 | hlist_for_each_entry(x, net->xfrm.state_byspi+h, byspi) { |
edcd5821 DM |
664 | if (x->props.family != family || |
665 | x->id.spi != spi || | |
1802571b | 666 | x->id.proto != proto || |
70e94e66 | 667 | !xfrm_addr_equal(&x->id.daddr, daddr, family)) |
edcd5821 DM |
668 | continue; |
669 | ||
3d6acfa7 JHS |
670 | if ((mark & x->mark.m) != x->mark.v) |
671 | continue; | |
edcd5821 DM |
672 | xfrm_state_hold(x); |
673 | return x; | |
674 | } | |
675 | ||
676 | return NULL; | |
677 | } | |
678 | ||
9aa60088 DM |
679 | static struct xfrm_state *__xfrm_state_lookup_byaddr(struct net *net, u32 mark, |
680 | const xfrm_address_t *daddr, | |
681 | const xfrm_address_t *saddr, | |
682 | u8 proto, unsigned short family) | |
edcd5821 | 683 | { |
221df1ed | 684 | unsigned int h = xfrm_src_hash(net, daddr, saddr, family); |
edcd5821 DM |
685 | struct xfrm_state *x; |
686 | ||
b67bfe0d | 687 | hlist_for_each_entry(x, net->xfrm.state_bysrc+h, bysrc) { |
edcd5821 | 688 | if (x->props.family != family || |
1802571b | 689 | x->id.proto != proto || |
70e94e66 YH |
690 | !xfrm_addr_equal(&x->id.daddr, daddr, family) || |
691 | !xfrm_addr_equal(&x->props.saddr, saddr, family)) | |
edcd5821 DM |
692 | continue; |
693 | ||
3d6acfa7 JHS |
694 | if ((mark & x->mark.m) != x->mark.v) |
695 | continue; | |
edcd5821 DM |
696 | xfrm_state_hold(x); |
697 | return x; | |
698 | } | |
699 | ||
700 | return NULL; | |
701 | } | |
702 | ||
703 | static inline struct xfrm_state * | |
704 | __xfrm_state_locate(struct xfrm_state *x, int use_spi, int family) | |
705 | { | |
221df1ed | 706 | struct net *net = xs_net(x); |
bd55775c | 707 | u32 mark = x->mark.v & x->mark.m; |
221df1ed | 708 | |
edcd5821 | 709 | if (use_spi) |
bd55775c JHS |
710 | return __xfrm_state_lookup(net, mark, &x->id.daddr, |
711 | x->id.spi, x->id.proto, family); | |
edcd5821 | 712 | else |
bd55775c JHS |
713 | return __xfrm_state_lookup_byaddr(net, mark, |
714 | &x->id.daddr, | |
edcd5821 DM |
715 | &x->props.saddr, |
716 | x->id.proto, family); | |
717 | } | |
718 | ||
98806f75 | 719 | static void xfrm_hash_grow_check(struct net *net, int have_hash_collision) |
2fab22f2 PM |
720 | { |
721 | if (have_hash_collision && | |
98806f75 AD |
722 | (net->xfrm.state_hmask + 1) < xfrm_state_hashmax && |
723 | net->xfrm.state_num > net->xfrm.state_hmask) | |
724 | schedule_work(&net->xfrm.state_hash_work); | |
2fab22f2 PM |
725 | } |
726 | ||
08ec9af1 | 727 | static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x, |
4a08ab0f | 728 | const struct flowi *fl, unsigned short family, |
08ec9af1 DM |
729 | struct xfrm_state **best, int *acq_in_progress, |
730 | int *error) | |
731 | { | |
732 | /* Resolution logic: | |
733 | * 1. There is a valid state with matching selector. Done. | |
734 | * 2. Valid state with inappropriate selector. Skip. | |
735 | * | |
736 | * Entering area of "sysdeps". | |
737 | * | |
738 | * 3. If state is not valid, selector is temporary, it selects | |
739 | * only session which triggered previous resolution. Key | |
740 | * manager will do something to install a state with proper | |
741 | * selector. | |
742 | */ | |
743 | if (x->km.state == XFRM_STATE_VALID) { | |
744 | if ((x->sel.family && | |
745 | !xfrm_selector_match(&x->sel, fl, x->sel.family)) || | |
746 | !security_xfrm_state_pol_flow_match(x, pol, fl)) | |
747 | return; | |
748 | ||
749 | if (!*best || | |
750 | (*best)->km.dying > x->km.dying || | |
751 | ((*best)->km.dying == x->km.dying && | |
752 | (*best)->curlft.add_time < x->curlft.add_time)) | |
753 | *best = x; | |
754 | } else if (x->km.state == XFRM_STATE_ACQ) { | |
755 | *acq_in_progress = 1; | |
756 | } else if (x->km.state == XFRM_STATE_ERROR || | |
757 | x->km.state == XFRM_STATE_EXPIRED) { | |
758 | if (xfrm_selector_match(&x->sel, fl, x->sel.family) && | |
759 | security_xfrm_state_pol_flow_match(x, pol, fl)) | |
760 | *error = -ESRCH; | |
761 | } | |
762 | } | |
763 | ||
1da177e4 | 764 | struct xfrm_state * |
33765d06 | 765 | xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
b520e9f6 | 766 | const struct flowi *fl, struct xfrm_tmpl *tmpl, |
1da177e4 LT |
767 | struct xfrm_policy *pol, int *err, |
768 | unsigned short family) | |
769 | { | |
08ec9af1 | 770 | static xfrm_address_t saddr_wildcard = { }; |
5447c5e4 | 771 | struct net *net = xp_net(pol); |
6a783c90 | 772 | unsigned int h, h_wildcard; |
37b08e34 | 773 | struct xfrm_state *x, *x0, *to_put; |
1da177e4 LT |
774 | int acquire_in_progress = 0; |
775 | int error = 0; | |
776 | struct xfrm_state *best = NULL; | |
bd55775c | 777 | u32 mark = pol->mark.v & pol->mark.m; |
8444cf71 | 778 | unsigned short encap_family = tmpl->encap_family; |
0f24558e | 779 | struct km_event c; |
a716c119 | 780 | |
37b08e34 DM |
781 | to_put = NULL; |
782 | ||
283bc9f3 | 783 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
8444cf71 | 784 | h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family); |
b67bfe0d | 785 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
8444cf71 | 786 | if (x->props.family == encap_family && |
1da177e4 | 787 | x->props.reqid == tmpl->reqid && |
3d6acfa7 | 788 | (mark & x->mark.m) == x->mark.v && |
fbd9a5b4 | 789 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
8444cf71 | 790 | xfrm_state_addr_check(x, daddr, saddr, encap_family) && |
1da177e4 LT |
791 | tmpl->mode == x->props.mode && |
792 | tmpl->id.proto == x->id.proto && | |
08ec9af1 | 793 | (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) |
1f673c5f | 794 | xfrm_state_look_at(pol, x, fl, encap_family, |
08ec9af1 DM |
795 | &best, &acquire_in_progress, &error); |
796 | } | |
6f115638 | 797 | if (best || acquire_in_progress) |
08ec9af1 DM |
798 | goto found; |
799 | ||
8444cf71 | 800 | h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, encap_family); |
b67bfe0d | 801 | hlist_for_each_entry(x, net->xfrm.state_bydst+h_wildcard, bydst) { |
8444cf71 | 802 | if (x->props.family == encap_family && |
08ec9af1 | 803 | x->props.reqid == tmpl->reqid && |
3d6acfa7 | 804 | (mark & x->mark.m) == x->mark.v && |
08ec9af1 | 805 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
f59bbdfa | 806 | xfrm_addr_equal(&x->id.daddr, daddr, encap_family) && |
08ec9af1 DM |
807 | tmpl->mode == x->props.mode && |
808 | tmpl->id.proto == x->id.proto && | |
809 | (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) | |
1f673c5f | 810 | xfrm_state_look_at(pol, x, fl, encap_family, |
08ec9af1 | 811 | &best, &acquire_in_progress, &error); |
1da177e4 LT |
812 | } |
813 | ||
08ec9af1 | 814 | found: |
1da177e4 LT |
815 | x = best; |
816 | if (!x && !error && !acquire_in_progress) { | |
5c5d281a | 817 | if (tmpl->id.spi && |
bd55775c | 818 | (x0 = __xfrm_state_lookup(net, mark, daddr, tmpl->id.spi, |
8444cf71 | 819 | tmpl->id.proto, encap_family)) != NULL) { |
37b08e34 | 820 | to_put = x0; |
1da177e4 LT |
821 | error = -EEXIST; |
822 | goto out; | |
823 | } | |
0f24558e HG |
824 | |
825 | c.net = net; | |
826 | /* If the KMs have no listeners (yet...), avoid allocating an SA | |
827 | * for each and every packet - garbage collection might not | |
828 | * handle the flood. | |
829 | */ | |
830 | if (!km_is_alive(&c)) { | |
831 | error = -ESRCH; | |
832 | goto out; | |
833 | } | |
834 | ||
5447c5e4 | 835 | x = xfrm_state_alloc(net); |
1da177e4 LT |
836 | if (x == NULL) { |
837 | error = -ENOMEM; | |
838 | goto out; | |
839 | } | |
8444cf71 | 840 | /* Initialize temporary state matching only |
1da177e4 | 841 | * to current session. */ |
8444cf71 | 842 | xfrm_init_tempstate(x, fl, tmpl, daddr, saddr, family); |
bd55775c | 843 | memcpy(&x->mark, &pol->mark, sizeof(x->mark)); |
1da177e4 | 844 | |
1d28f42c | 845 | error = security_xfrm_state_alloc_acquire(x, pol->security, fl->flowi_secid); |
e0d1caa7 VY |
846 | if (error) { |
847 | x->km.state = XFRM_STATE_DEAD; | |
37b08e34 | 848 | to_put = x; |
e0d1caa7 VY |
849 | x = NULL; |
850 | goto out; | |
851 | } | |
852 | ||
1da177e4 LT |
853 | if (km_query(x, tmpl, pol) == 0) { |
854 | x->km.state = XFRM_STATE_ACQ; | |
5447c5e4 AD |
855 | list_add(&x->km.all, &net->xfrm.state_all); |
856 | hlist_add_head(&x->bydst, net->xfrm.state_bydst+h); | |
8444cf71 | 857 | h = xfrm_src_hash(net, daddr, saddr, encap_family); |
5447c5e4 | 858 | hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h); |
1da177e4 | 859 | if (x->id.spi) { |
8444cf71 | 860 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, encap_family); |
5447c5e4 | 861 | hlist_add_head(&x->byspi, net->xfrm.state_byspi+h); |
1da177e4 | 862 | } |
b27aeadb | 863 | x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires; |
9e0d57fd | 864 | tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL); |
5447c5e4 AD |
865 | net->xfrm.state_num++; |
866 | xfrm_hash_grow_check(net, x->bydst.next != NULL); | |
1da177e4 LT |
867 | } else { |
868 | x->km.state = XFRM_STATE_DEAD; | |
37b08e34 | 869 | to_put = x; |
1da177e4 LT |
870 | x = NULL; |
871 | error = -ESRCH; | |
872 | } | |
873 | } | |
874 | out: | |
875 | if (x) | |
876 | xfrm_state_hold(x); | |
877 | else | |
878 | *err = acquire_in_progress ? -EAGAIN : error; | |
283bc9f3 | 879 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
37b08e34 DM |
880 | if (to_put) |
881 | xfrm_state_put(to_put); | |
1da177e4 LT |
882 | return x; |
883 | } | |
884 | ||
628529b6 | 885 | struct xfrm_state * |
bd55775c | 886 | xfrm_stateonly_find(struct net *net, u32 mark, |
5447c5e4 | 887 | xfrm_address_t *daddr, xfrm_address_t *saddr, |
628529b6 JHS |
888 | unsigned short family, u8 mode, u8 proto, u32 reqid) |
889 | { | |
4bda4f25 | 890 | unsigned int h; |
628529b6 | 891 | struct xfrm_state *rx = NULL, *x = NULL; |
628529b6 | 892 | |
4ae770bf | 893 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
5447c5e4 | 894 | h = xfrm_dst_hash(net, daddr, saddr, reqid, family); |
b67bfe0d | 895 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
628529b6 JHS |
896 | if (x->props.family == family && |
897 | x->props.reqid == reqid && | |
3d6acfa7 | 898 | (mark & x->mark.m) == x->mark.v && |
628529b6 JHS |
899 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
900 | xfrm_state_addr_check(x, daddr, saddr, family) && | |
901 | mode == x->props.mode && | |
902 | proto == x->id.proto && | |
903 | x->km.state == XFRM_STATE_VALID) { | |
904 | rx = x; | |
905 | break; | |
906 | } | |
907 | } | |
908 | ||
909 | if (rx) | |
910 | xfrm_state_hold(rx); | |
4ae770bf | 911 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
628529b6 JHS |
912 | |
913 | ||
914 | return rx; | |
915 | } | |
916 | EXPORT_SYMBOL(xfrm_stateonly_find); | |
917 | ||
c454997e FD |
918 | struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi, |
919 | unsigned short family) | |
920 | { | |
921 | struct xfrm_state *x; | |
922 | struct xfrm_state_walk *w; | |
923 | ||
924 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
925 | list_for_each_entry(w, &net->xfrm.state_all, all) { | |
926 | x = container_of(w, struct xfrm_state, km); | |
927 | if (x->props.family != family || | |
928 | x->id.spi != spi) | |
929 | continue; | |
930 | ||
c454997e | 931 | xfrm_state_hold(x); |
bdddbf69 | 932 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
c454997e FD |
933 | return x; |
934 | } | |
935 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); | |
936 | return NULL; | |
937 | } | |
938 | EXPORT_SYMBOL(xfrm_state_lookup_byspi); | |
939 | ||
1da177e4 LT |
940 | static void __xfrm_state_insert(struct xfrm_state *x) |
941 | { | |
98806f75 | 942 | struct net *net = xs_net(x); |
a624c108 | 943 | unsigned int h; |
1da177e4 | 944 | |
98806f75 | 945 | list_add(&x->km.all, &net->xfrm.state_all); |
4c563f76 | 946 | |
98806f75 | 947 | h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr, |
c1969f29 | 948 | x->props.reqid, x->props.family); |
98806f75 | 949 | hlist_add_head(&x->bydst, net->xfrm.state_bydst+h); |
1da177e4 | 950 | |
98806f75 AD |
951 | h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family); |
952 | hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h); | |
1da177e4 | 953 | |
7b4dc360 | 954 | if (x->id.spi) { |
98806f75 | 955 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, |
6c44e6b7 MN |
956 | x->props.family); |
957 | ||
98806f75 | 958 | hlist_add_head(&x->byspi, net->xfrm.state_byspi+h); |
6c44e6b7 MN |
959 | } |
960 | ||
9e0d57fd | 961 | tasklet_hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL); |
a47f0ce0 DM |
962 | if (x->replay_maxage) |
963 | mod_timer(&x->rtimer, jiffies + x->replay_maxage); | |
f8cd5488 | 964 | |
98806f75 | 965 | net->xfrm.state_num++; |
f034b5d4 | 966 | |
98806f75 | 967 | xfrm_hash_grow_check(net, x->bydst.next != NULL); |
1da177e4 LT |
968 | } |
969 | ||
283bc9f3 | 970 | /* net->xfrm.xfrm_state_lock is held */ |
c7f5ea3a DM |
971 | static void __xfrm_state_bump_genids(struct xfrm_state *xnew) |
972 | { | |
98806f75 | 973 | struct net *net = xs_net(xnew); |
c7f5ea3a DM |
974 | unsigned short family = xnew->props.family; |
975 | u32 reqid = xnew->props.reqid; | |
976 | struct xfrm_state *x; | |
c7f5ea3a | 977 | unsigned int h; |
3d6acfa7 | 978 | u32 mark = xnew->mark.v & xnew->mark.m; |
c7f5ea3a | 979 | |
98806f75 | 980 | h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family); |
b67bfe0d | 981 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
c7f5ea3a DM |
982 | if (x->props.family == family && |
983 | x->props.reqid == reqid && | |
3d6acfa7 | 984 | (mark & x->mark.m) == x->mark.v && |
70e94e66 YH |
985 | xfrm_addr_equal(&x->id.daddr, &xnew->id.daddr, family) && |
986 | xfrm_addr_equal(&x->props.saddr, &xnew->props.saddr, family)) | |
34996cb9 | 987 | x->genid++; |
c7f5ea3a DM |
988 | } |
989 | } | |
990 | ||
1da177e4 LT |
991 | void xfrm_state_insert(struct xfrm_state *x) |
992 | { | |
283bc9f3 FD |
993 | struct net *net = xs_net(x); |
994 | ||
995 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
c7f5ea3a | 996 | __xfrm_state_bump_genids(x); |
1da177e4 | 997 | __xfrm_state_insert(x); |
283bc9f3 | 998 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
999 | } |
1000 | EXPORT_SYMBOL(xfrm_state_insert); | |
1001 | ||
283bc9f3 | 1002 | /* net->xfrm.xfrm_state_lock is held */ |
e473fcb4 MK |
1003 | static struct xfrm_state *__find_acq_core(struct net *net, |
1004 | const struct xfrm_mark *m, | |
a70486f0 DM |
1005 | unsigned short family, u8 mode, |
1006 | u32 reqid, u8 proto, | |
1007 | const xfrm_address_t *daddr, | |
e473fcb4 MK |
1008 | const xfrm_address_t *saddr, |
1009 | int create) | |
2770834c | 1010 | { |
5447c5e4 | 1011 | unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family); |
2770834c | 1012 | struct xfrm_state *x; |
3d6acfa7 | 1013 | u32 mark = m->v & m->m; |
2770834c | 1014 | |
b67bfe0d | 1015 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
2770834c DM |
1016 | if (x->props.reqid != reqid || |
1017 | x->props.mode != mode || | |
1018 | x->props.family != family || | |
1019 | x->km.state != XFRM_STATE_ACQ || | |
75e252d9 | 1020 | x->id.spi != 0 || |
1802571b | 1021 | x->id.proto != proto || |
3d6acfa7 | 1022 | (mark & x->mark.m) != x->mark.v || |
70e94e66 YH |
1023 | !xfrm_addr_equal(&x->id.daddr, daddr, family) || |
1024 | !xfrm_addr_equal(&x->props.saddr, saddr, family)) | |
2770834c DM |
1025 | continue; |
1026 | ||
2770834c DM |
1027 | xfrm_state_hold(x); |
1028 | return x; | |
1029 | } | |
1030 | ||
1031 | if (!create) | |
1032 | return NULL; | |
1033 | ||
5447c5e4 | 1034 | x = xfrm_state_alloc(net); |
2770834c DM |
1035 | if (likely(x)) { |
1036 | switch (family) { | |
1037 | case AF_INET: | |
1038 | x->sel.daddr.a4 = daddr->a4; | |
1039 | x->sel.saddr.a4 = saddr->a4; | |
1040 | x->sel.prefixlen_d = 32; | |
1041 | x->sel.prefixlen_s = 32; | |
1042 | x->props.saddr.a4 = saddr->a4; | |
1043 | x->id.daddr.a4 = daddr->a4; | |
1044 | break; | |
1045 | ||
1046 | case AF_INET6: | |
15e318bd JB |
1047 | x->sel.daddr.in6 = daddr->in6; |
1048 | x->sel.saddr.in6 = saddr->in6; | |
2770834c DM |
1049 | x->sel.prefixlen_d = 128; |
1050 | x->sel.prefixlen_s = 128; | |
15e318bd JB |
1051 | x->props.saddr.in6 = saddr->in6; |
1052 | x->id.daddr.in6 = daddr->in6; | |
2770834c | 1053 | break; |
3ff50b79 | 1054 | } |
2770834c DM |
1055 | |
1056 | x->km.state = XFRM_STATE_ACQ; | |
1057 | x->id.proto = proto; | |
1058 | x->props.family = family; | |
1059 | x->props.mode = mode; | |
1060 | x->props.reqid = reqid; | |
bd55775c JHS |
1061 | x->mark.v = m->v; |
1062 | x->mark.m = m->m; | |
b27aeadb | 1063 | x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires; |
2770834c | 1064 | xfrm_state_hold(x); |
9e0d57fd | 1065 | tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL); |
5447c5e4 AD |
1066 | list_add(&x->km.all, &net->xfrm.state_all); |
1067 | hlist_add_head(&x->bydst, net->xfrm.state_bydst+h); | |
1068 | h = xfrm_src_hash(net, daddr, saddr, family); | |
1069 | hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h); | |
918049f0 | 1070 | |
5447c5e4 | 1071 | net->xfrm.state_num++; |
918049f0 | 1072 | |
5447c5e4 | 1073 | xfrm_hash_grow_check(net, x->bydst.next != NULL); |
2770834c DM |
1074 | } |
1075 | ||
1076 | return x; | |
1077 | } | |
1078 | ||
bd55775c | 1079 | static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); |
1da177e4 LT |
1080 | |
1081 | int xfrm_state_add(struct xfrm_state *x) | |
1082 | { | |
5447c5e4 | 1083 | struct net *net = xs_net(x); |
37b08e34 | 1084 | struct xfrm_state *x1, *to_put; |
1da177e4 LT |
1085 | int family; |
1086 | int err; | |
bd55775c | 1087 | u32 mark = x->mark.v & x->mark.m; |
eb2971b6 | 1088 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
1da177e4 LT |
1089 | |
1090 | family = x->props.family; | |
1da177e4 | 1091 | |
37b08e34 DM |
1092 | to_put = NULL; |
1093 | ||
283bc9f3 | 1094 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 1095 | |
edcd5821 | 1096 | x1 = __xfrm_state_locate(x, use_spi, family); |
1da177e4 | 1097 | if (x1) { |
37b08e34 | 1098 | to_put = x1; |
1da177e4 LT |
1099 | x1 = NULL; |
1100 | err = -EEXIST; | |
1101 | goto out; | |
1102 | } | |
1103 | ||
eb2971b6 | 1104 | if (use_spi && x->km.seq) { |
bd55775c | 1105 | x1 = __xfrm_find_acq_byseq(net, mark, x->km.seq); |
75e252d9 | 1106 | if (x1 && ((x1->id.proto != x->id.proto) || |
70e94e66 | 1107 | !xfrm_addr_equal(&x1->id.daddr, &x->id.daddr, family))) { |
37b08e34 | 1108 | to_put = x1; |
1da177e4 LT |
1109 | x1 = NULL; |
1110 | } | |
1111 | } | |
1112 | ||
eb2971b6 | 1113 | if (use_spi && !x1) |
bd55775c JHS |
1114 | x1 = __find_acq_core(net, &x->mark, family, x->props.mode, |
1115 | x->props.reqid, x->id.proto, | |
2770834c | 1116 | &x->id.daddr, &x->props.saddr, 0); |
1da177e4 | 1117 | |
c7f5ea3a | 1118 | __xfrm_state_bump_genids(x); |
1da177e4 LT |
1119 | __xfrm_state_insert(x); |
1120 | err = 0; | |
1121 | ||
1122 | out: | |
283bc9f3 | 1123 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1124 | |
1125 | if (x1) { | |
1126 | xfrm_state_delete(x1); | |
1127 | xfrm_state_put(x1); | |
1128 | } | |
1129 | ||
37b08e34 DM |
1130 | if (to_put) |
1131 | xfrm_state_put(to_put); | |
1132 | ||
1da177e4 LT |
1133 | return err; |
1134 | } | |
1135 | EXPORT_SYMBOL(xfrm_state_add); | |
1136 | ||
80c9abaa | 1137 | #ifdef CONFIG_XFRM_MIGRATE |
cc9ab60e | 1138 | static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig) |
80c9abaa | 1139 | { |
98806f75 | 1140 | struct net *net = xs_net(orig); |
98806f75 | 1141 | struct xfrm_state *x = xfrm_state_alloc(net); |
80c9abaa | 1142 | if (!x) |
553f9118 | 1143 | goto out; |
80c9abaa SS |
1144 | |
1145 | memcpy(&x->id, &orig->id, sizeof(x->id)); | |
1146 | memcpy(&x->sel, &orig->sel, sizeof(x->sel)); | |
1147 | memcpy(&x->lft, &orig->lft, sizeof(x->lft)); | |
1148 | x->props.mode = orig->props.mode; | |
1149 | x->props.replay_window = orig->props.replay_window; | |
1150 | x->props.reqid = orig->props.reqid; | |
1151 | x->props.family = orig->props.family; | |
1152 | x->props.saddr = orig->props.saddr; | |
1153 | ||
1154 | if (orig->aalg) { | |
4447bb33 | 1155 | x->aalg = xfrm_algo_auth_clone(orig->aalg); |
80c9abaa SS |
1156 | if (!x->aalg) |
1157 | goto error; | |
1158 | } | |
1159 | x->props.aalgo = orig->props.aalgo; | |
1160 | ||
ee5c2317 SK |
1161 | if (orig->aead) { |
1162 | x->aead = xfrm_algo_aead_clone(orig->aead); | |
1163 | if (!x->aead) | |
1164 | goto error; | |
1165 | } | |
80c9abaa SS |
1166 | if (orig->ealg) { |
1167 | x->ealg = xfrm_algo_clone(orig->ealg); | |
1168 | if (!x->ealg) | |
1169 | goto error; | |
1170 | } | |
1171 | x->props.ealgo = orig->props.ealgo; | |
1172 | ||
1173 | if (orig->calg) { | |
1174 | x->calg = xfrm_algo_clone(orig->calg); | |
1175 | if (!x->calg) | |
1176 | goto error; | |
1177 | } | |
1178 | x->props.calgo = orig->props.calgo; | |
1179 | ||
a716c119 | 1180 | if (orig->encap) { |
80c9abaa SS |
1181 | x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL); |
1182 | if (!x->encap) | |
1183 | goto error; | |
1184 | } | |
1185 | ||
1186 | if (orig->coaddr) { | |
1187 | x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr), | |
1188 | GFP_KERNEL); | |
1189 | if (!x->coaddr) | |
1190 | goto error; | |
1191 | } | |
1192 | ||
af2f464e | 1193 | if (orig->replay_esn) { |
cc9ab60e | 1194 | if (xfrm_replay_clone(x, orig)) |
af2f464e SK |
1195 | goto error; |
1196 | } | |
1197 | ||
bd55775c JHS |
1198 | memcpy(&x->mark, &orig->mark, sizeof(x->mark)); |
1199 | ||
cc9ab60e | 1200 | if (xfrm_init_state(x) < 0) |
80c9abaa SS |
1201 | goto error; |
1202 | ||
1203 | x->props.flags = orig->props.flags; | |
a947b0a9 | 1204 | x->props.extra_flags = orig->props.extra_flags; |
80c9abaa | 1205 | |
ee5c2317 SK |
1206 | x->tfcpad = orig->tfcpad; |
1207 | x->replay_maxdiff = orig->replay_maxdiff; | |
1208 | x->replay_maxage = orig->replay_maxage; | |
80c9abaa SS |
1209 | x->curlft.add_time = orig->curlft.add_time; |
1210 | x->km.state = orig->km.state; | |
1211 | x->km.seq = orig->km.seq; | |
1212 | ||
1213 | return x; | |
1214 | ||
1215 | error: | |
553f9118 HX |
1216 | xfrm_state_put(x); |
1217 | out: | |
80c9abaa SS |
1218 | return NULL; |
1219 | } | |
80c9abaa | 1220 | |
283bc9f3 | 1221 | struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net) |
80c9abaa SS |
1222 | { |
1223 | unsigned int h; | |
8c0cba22 SK |
1224 | struct xfrm_state *x = NULL; |
1225 | ||
1226 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
80c9abaa SS |
1227 | |
1228 | if (m->reqid) { | |
283bc9f3 | 1229 | h = xfrm_dst_hash(net, &m->old_daddr, &m->old_saddr, |
80c9abaa | 1230 | m->reqid, m->old_family); |
283bc9f3 | 1231 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
80c9abaa SS |
1232 | if (x->props.mode != m->mode || |
1233 | x->id.proto != m->proto) | |
1234 | continue; | |
1235 | if (m->reqid && x->props.reqid != m->reqid) | |
1236 | continue; | |
70e94e66 YH |
1237 | if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr, |
1238 | m->old_family) || | |
1239 | !xfrm_addr_equal(&x->props.saddr, &m->old_saddr, | |
1240 | m->old_family)) | |
80c9abaa SS |
1241 | continue; |
1242 | xfrm_state_hold(x); | |
8c0cba22 | 1243 | break; |
80c9abaa SS |
1244 | } |
1245 | } else { | |
283bc9f3 | 1246 | h = xfrm_src_hash(net, &m->old_daddr, &m->old_saddr, |
80c9abaa | 1247 | m->old_family); |
283bc9f3 | 1248 | hlist_for_each_entry(x, net->xfrm.state_bysrc+h, bysrc) { |
80c9abaa SS |
1249 | if (x->props.mode != m->mode || |
1250 | x->id.proto != m->proto) | |
1251 | continue; | |
70e94e66 YH |
1252 | if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr, |
1253 | m->old_family) || | |
1254 | !xfrm_addr_equal(&x->props.saddr, &m->old_saddr, | |
1255 | m->old_family)) | |
80c9abaa SS |
1256 | continue; |
1257 | xfrm_state_hold(x); | |
8c0cba22 | 1258 | break; |
80c9abaa SS |
1259 | } |
1260 | } | |
1261 | ||
8c0cba22 SK |
1262 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1263 | ||
1264 | return x; | |
80c9abaa SS |
1265 | } |
1266 | EXPORT_SYMBOL(xfrm_migrate_state_find); | |
1267 | ||
3e94c2dc WC |
1268 | struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, |
1269 | struct xfrm_migrate *m) | |
80c9abaa SS |
1270 | { |
1271 | struct xfrm_state *xc; | |
80c9abaa | 1272 | |
cc9ab60e | 1273 | xc = xfrm_state_clone(x); |
80c9abaa SS |
1274 | if (!xc) |
1275 | return NULL; | |
1276 | ||
1277 | memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr)); | |
1278 | memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr)); | |
1279 | ||
1280 | /* add state */ | |
70e94e66 | 1281 | if (xfrm_addr_equal(&x->id.daddr, &m->new_daddr, m->new_family)) { |
80c9abaa SS |
1282 | /* a care is needed when the destination address of the |
1283 | state is to be updated as it is a part of triplet */ | |
1284 | xfrm_state_insert(xc); | |
1285 | } else { | |
cc9ab60e | 1286 | if (xfrm_state_add(xc) < 0) |
80c9abaa SS |
1287 | goto error; |
1288 | } | |
1289 | ||
1290 | return xc; | |
1291 | error: | |
78347c8c | 1292 | xfrm_state_put(xc); |
80c9abaa SS |
1293 | return NULL; |
1294 | } | |
1295 | EXPORT_SYMBOL(xfrm_state_migrate); | |
1296 | #endif | |
1297 | ||
1da177e4 LT |
1298 | int xfrm_state_update(struct xfrm_state *x) |
1299 | { | |
37b08e34 | 1300 | struct xfrm_state *x1, *to_put; |
1da177e4 | 1301 | int err; |
eb2971b6 | 1302 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
283bc9f3 | 1303 | struct net *net = xs_net(x); |
1da177e4 | 1304 | |
37b08e34 DM |
1305 | to_put = NULL; |
1306 | ||
283bc9f3 | 1307 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
edcd5821 | 1308 | x1 = __xfrm_state_locate(x, use_spi, x->props.family); |
1da177e4 LT |
1309 | |
1310 | err = -ESRCH; | |
1311 | if (!x1) | |
1312 | goto out; | |
1313 | ||
1314 | if (xfrm_state_kern(x1)) { | |
37b08e34 | 1315 | to_put = x1; |
1da177e4 LT |
1316 | err = -EEXIST; |
1317 | goto out; | |
1318 | } | |
1319 | ||
1320 | if (x1->km.state == XFRM_STATE_ACQ) { | |
1321 | __xfrm_state_insert(x); | |
1322 | x = NULL; | |
1323 | } | |
1324 | err = 0; | |
1325 | ||
1326 | out: | |
283bc9f3 | 1327 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 1328 | |
37b08e34 DM |
1329 | if (to_put) |
1330 | xfrm_state_put(to_put); | |
1331 | ||
1da177e4 LT |
1332 | if (err) |
1333 | return err; | |
1334 | ||
1335 | if (!x) { | |
1336 | xfrm_state_delete(x1); | |
1337 | xfrm_state_put(x1); | |
1338 | return 0; | |
1339 | } | |
1340 | ||
1341 | err = -EINVAL; | |
1342 | spin_lock_bh(&x1->lock); | |
1343 | if (likely(x1->km.state == XFRM_STATE_VALID)) { | |
1344 | if (x->encap && x1->encap) | |
1345 | memcpy(x1->encap, x->encap, sizeof(*x1->encap)); | |
060f02a3 NT |
1346 | if (x->coaddr && x1->coaddr) { |
1347 | memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr)); | |
1348 | } | |
1349 | if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel))) | |
1350 | memcpy(&x1->sel, &x->sel, sizeof(x1->sel)); | |
1da177e4 LT |
1351 | memcpy(&x1->lft, &x->lft, sizeof(x1->lft)); |
1352 | x1->km.dying = 0; | |
1353 | ||
9e0d57fd | 1354 | tasklet_hrtimer_start(&x1->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL); |
1da177e4 LT |
1355 | if (x1->curlft.use_time) |
1356 | xfrm_state_check_expire(x1); | |
1357 | ||
1358 | err = 0; | |
8fcbc637 TG |
1359 | x->km.state = XFRM_STATE_DEAD; |
1360 | __xfrm_state_put(x); | |
1da177e4 LT |
1361 | } |
1362 | spin_unlock_bh(&x1->lock); | |
1363 | ||
1364 | xfrm_state_put(x1); | |
1365 | ||
1366 | return err; | |
1367 | } | |
1368 | EXPORT_SYMBOL(xfrm_state_update); | |
1369 | ||
1370 | int xfrm_state_check_expire(struct xfrm_state *x) | |
1371 | { | |
1372 | if (!x->curlft.use_time) | |
9d729f72 | 1373 | x->curlft.use_time = get_seconds(); |
1da177e4 | 1374 | |
1da177e4 LT |
1375 | if (x->curlft.bytes >= x->lft.hard_byte_limit || |
1376 | x->curlft.packets >= x->lft.hard_packet_limit) { | |
4666faab | 1377 | x->km.state = XFRM_STATE_EXPIRED; |
9b7a787d | 1378 | tasklet_hrtimer_start(&x->mtimer, ktime_set(0, 0), HRTIMER_MODE_REL); |
1da177e4 LT |
1379 | return -EINVAL; |
1380 | } | |
1381 | ||
1382 | if (!x->km.dying && | |
1383 | (x->curlft.bytes >= x->lft.soft_byte_limit || | |
4666faab HX |
1384 | x->curlft.packets >= x->lft.soft_packet_limit)) { |
1385 | x->km.dying = 1; | |
53bc6b4d | 1386 | km_state_expired(x, 0, 0); |
4666faab | 1387 | } |
1da177e4 LT |
1388 | return 0; |
1389 | } | |
1390 | EXPORT_SYMBOL(xfrm_state_check_expire); | |
1391 | ||
1da177e4 | 1392 | struct xfrm_state * |
a70486f0 | 1393 | xfrm_state_lookup(struct net *net, u32 mark, const xfrm_address_t *daddr, __be32 spi, |
bd55775c | 1394 | u8 proto, unsigned short family) |
1da177e4 LT |
1395 | { |
1396 | struct xfrm_state *x; | |
1da177e4 | 1397 | |
283bc9f3 | 1398 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1399 | x = __xfrm_state_lookup(net, mark, daddr, spi, proto, family); |
283bc9f3 | 1400 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1401 | return x; |
1402 | } | |
1403 | EXPORT_SYMBOL(xfrm_state_lookup); | |
1404 | ||
1405 | struct xfrm_state * | |
bd55775c | 1406 | xfrm_state_lookup_byaddr(struct net *net, u32 mark, |
a70486f0 | 1407 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
eb2971b6 MN |
1408 | u8 proto, unsigned short family) |
1409 | { | |
1410 | struct xfrm_state *x; | |
eb2971b6 | 1411 | |
283bc9f3 | 1412 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1413 | x = __xfrm_state_lookup_byaddr(net, mark, daddr, saddr, proto, family); |
283bc9f3 | 1414 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
eb2971b6 MN |
1415 | return x; |
1416 | } | |
1417 | EXPORT_SYMBOL(xfrm_state_lookup_byaddr); | |
1418 | ||
1419 | struct xfrm_state * | |
e473fcb4 MK |
1420 | xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, u8 mode, u32 reqid, |
1421 | u8 proto, const xfrm_address_t *daddr, | |
1422 | const xfrm_address_t *saddr, int create, unsigned short family) | |
1da177e4 LT |
1423 | { |
1424 | struct xfrm_state *x; | |
1da177e4 | 1425 | |
283bc9f3 | 1426 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1427 | x = __find_acq_core(net, mark, family, mode, reqid, proto, daddr, saddr, create); |
283bc9f3 | 1428 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
2770834c | 1429 | |
1da177e4 LT |
1430 | return x; |
1431 | } | |
1432 | EXPORT_SYMBOL(xfrm_find_acq); | |
1433 | ||
41a49cc3 MN |
1434 | #ifdef CONFIG_XFRM_SUB_POLICY |
1435 | int | |
1436 | xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, | |
283bc9f3 | 1437 | unsigned short family, struct net *net) |
41a49cc3 MN |
1438 | { |
1439 | int err = 0; | |
1440 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
1441 | if (!afinfo) | |
1442 | return -EAFNOSUPPORT; | |
1443 | ||
283bc9f3 | 1444 | spin_lock_bh(&net->xfrm.xfrm_state_lock); /*FIXME*/ |
41a49cc3 MN |
1445 | if (afinfo->tmpl_sort) |
1446 | err = afinfo->tmpl_sort(dst, src, n); | |
283bc9f3 | 1447 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
41a49cc3 MN |
1448 | xfrm_state_put_afinfo(afinfo); |
1449 | return err; | |
1450 | } | |
1451 | EXPORT_SYMBOL(xfrm_tmpl_sort); | |
1452 | ||
1453 | int | |
1454 | xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, | |
1455 | unsigned short family) | |
1456 | { | |
1457 | int err = 0; | |
1458 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
35ea790d | 1459 | struct net *net = xs_net(*src); |
283bc9f3 | 1460 | |
41a49cc3 MN |
1461 | if (!afinfo) |
1462 | return -EAFNOSUPPORT; | |
1463 | ||
283bc9f3 | 1464 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
41a49cc3 MN |
1465 | if (afinfo->state_sort) |
1466 | err = afinfo->state_sort(dst, src, n); | |
283bc9f3 | 1467 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
41a49cc3 MN |
1468 | xfrm_state_put_afinfo(afinfo); |
1469 | return err; | |
1470 | } | |
1471 | EXPORT_SYMBOL(xfrm_state_sort); | |
1472 | #endif | |
1473 | ||
1da177e4 LT |
1474 | /* Silly enough, but I'm lazy to build resolution list */ |
1475 | ||
bd55775c | 1476 | static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq) |
1da177e4 LT |
1477 | { |
1478 | int i; | |
1da177e4 | 1479 | |
5447c5e4 | 1480 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
8f126e37 DM |
1481 | struct xfrm_state *x; |
1482 | ||
b67bfe0d | 1483 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
8f126e37 | 1484 | if (x->km.seq == seq && |
3d6acfa7 | 1485 | (mark & x->mark.m) == x->mark.v && |
8f126e37 | 1486 | x->km.state == XFRM_STATE_ACQ) { |
1da177e4 LT |
1487 | xfrm_state_hold(x); |
1488 | return x; | |
1489 | } | |
1490 | } | |
1491 | } | |
1492 | return NULL; | |
1493 | } | |
1494 | ||
bd55775c | 1495 | struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq) |
1da177e4 LT |
1496 | { |
1497 | struct xfrm_state *x; | |
1498 | ||
283bc9f3 | 1499 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1500 | x = __xfrm_find_acq_byseq(net, mark, seq); |
283bc9f3 | 1501 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1502 | return x; |
1503 | } | |
1504 | EXPORT_SYMBOL(xfrm_find_acq_byseq); | |
1505 | ||
1506 | u32 xfrm_get_acqseq(void) | |
1507 | { | |
1508 | u32 res; | |
6836b9bd | 1509 | static atomic_t acqseq; |
1510 | ||
1511 | do { | |
1512 | res = atomic_inc_return(&acqseq); | |
1513 | } while (!res); | |
1da177e4 | 1514 | |
1da177e4 LT |
1515 | return res; |
1516 | } | |
1517 | EXPORT_SYMBOL(xfrm_get_acqseq); | |
1518 | ||
776e9dd9 FD |
1519 | int verify_spi_info(u8 proto, u32 min, u32 max) |
1520 | { | |
1521 | switch (proto) { | |
1522 | case IPPROTO_AH: | |
1523 | case IPPROTO_ESP: | |
1524 | break; | |
1525 | ||
1526 | case IPPROTO_COMP: | |
1527 | /* IPCOMP spi is 16-bits. */ | |
1528 | if (max >= 0x10000) | |
1529 | return -EINVAL; | |
1530 | break; | |
1531 | ||
1532 | default: | |
1533 | return -EINVAL; | |
1534 | } | |
1535 | ||
1536 | if (min > max) | |
1537 | return -EINVAL; | |
1538 | ||
1539 | return 0; | |
1540 | } | |
1541 | EXPORT_SYMBOL(verify_spi_info); | |
1542 | ||
658b219e | 1543 | int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high) |
1da177e4 | 1544 | { |
221df1ed | 1545 | struct net *net = xs_net(x); |
f034b5d4 | 1546 | unsigned int h; |
1da177e4 | 1547 | struct xfrm_state *x0; |
658b219e HX |
1548 | int err = -ENOENT; |
1549 | __be32 minspi = htonl(low); | |
1550 | __be32 maxspi = htonl(high); | |
bd55775c | 1551 | u32 mark = x->mark.v & x->mark.m; |
1da177e4 | 1552 | |
658b219e HX |
1553 | spin_lock_bh(&x->lock); |
1554 | if (x->km.state == XFRM_STATE_DEAD) | |
1555 | goto unlock; | |
1556 | ||
1557 | err = 0; | |
1da177e4 | 1558 | if (x->id.spi) |
658b219e HX |
1559 | goto unlock; |
1560 | ||
1561 | err = -ENOENT; | |
1da177e4 LT |
1562 | |
1563 | if (minspi == maxspi) { | |
bd55775c | 1564 | x0 = xfrm_state_lookup(net, mark, &x->id.daddr, minspi, x->id.proto, x->props.family); |
1da177e4 LT |
1565 | if (x0) { |
1566 | xfrm_state_put(x0); | |
658b219e | 1567 | goto unlock; |
1da177e4 LT |
1568 | } |
1569 | x->id.spi = minspi; | |
1570 | } else { | |
1571 | u32 spi = 0; | |
9b7a787d | 1572 | for (h = 0; h < high-low+1; h++) { |
63862b5b | 1573 | spi = low + prandom_u32()%(high-low+1); |
bd55775c | 1574 | x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family); |
1da177e4 LT |
1575 | if (x0 == NULL) { |
1576 | x->id.spi = htonl(spi); | |
1577 | break; | |
1578 | } | |
1579 | xfrm_state_put(x0); | |
1580 | } | |
1581 | } | |
1582 | if (x->id.spi) { | |
283bc9f3 | 1583 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12604d8a AD |
1584 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family); |
1585 | hlist_add_head(&x->byspi, net->xfrm.state_byspi+h); | |
283bc9f3 | 1586 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
658b219e HX |
1587 | |
1588 | err = 0; | |
1da177e4 | 1589 | } |
658b219e HX |
1590 | |
1591 | unlock: | |
1592 | spin_unlock_bh(&x->lock); | |
1593 | ||
1594 | return err; | |
1da177e4 LT |
1595 | } |
1596 | EXPORT_SYMBOL(xfrm_alloc_spi); | |
1597 | ||
d3623099 | 1598 | static bool __xfrm_state_filter_match(struct xfrm_state *x, |
870a2df4 | 1599 | struct xfrm_address_filter *filter) |
d3623099 ND |
1600 | { |
1601 | if (filter) { | |
1602 | if ((filter->family == AF_INET || | |
1603 | filter->family == AF_INET6) && | |
1604 | x->props.family != filter->family) | |
1605 | return false; | |
1606 | ||
1607 | return addr_match(&x->props.saddr, &filter->saddr, | |
1608 | filter->splen) && | |
1609 | addr_match(&x->id.daddr, &filter->daddr, | |
1610 | filter->dplen); | |
1611 | } | |
1612 | return true; | |
1613 | } | |
1614 | ||
284fa7da | 1615 | int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, |
4c563f76 | 1616 | int (*func)(struct xfrm_state *, int, void*), |
1da177e4 LT |
1617 | void *data) |
1618 | { | |
12a169e7 HX |
1619 | struct xfrm_state *state; |
1620 | struct xfrm_state_walk *x; | |
1da177e4 LT |
1621 | int err = 0; |
1622 | ||
12a169e7 | 1623 | if (walk->seq != 0 && list_empty(&walk->all)) |
4c563f76 TT |
1624 | return 0; |
1625 | ||
283bc9f3 | 1626 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12a169e7 | 1627 | if (list_empty(&walk->all)) |
284fa7da | 1628 | x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all); |
12a169e7 | 1629 | else |
80077702 | 1630 | x = list_first_entry(&walk->all, struct xfrm_state_walk, all); |
284fa7da | 1631 | list_for_each_entry_from(x, &net->xfrm.state_all, all) { |
12a169e7 | 1632 | if (x->state == XFRM_STATE_DEAD) |
4c563f76 | 1633 | continue; |
12a169e7 HX |
1634 | state = container_of(x, struct xfrm_state, km); |
1635 | if (!xfrm_id_proto_match(state->id.proto, walk->proto)) | |
4c563f76 | 1636 | continue; |
d3623099 ND |
1637 | if (!__xfrm_state_filter_match(state, walk->filter)) |
1638 | continue; | |
12a169e7 HX |
1639 | err = func(state, walk->seq, data); |
1640 | if (err) { | |
1641 | list_move_tail(&walk->all, &x->all); | |
1642 | goto out; | |
1da177e4 | 1643 | } |
12a169e7 | 1644 | walk->seq++; |
1da177e4 | 1645 | } |
12a169e7 | 1646 | if (walk->seq == 0) { |
1da177e4 LT |
1647 | err = -ENOENT; |
1648 | goto out; | |
1649 | } | |
12a169e7 | 1650 | list_del_init(&walk->all); |
1da177e4 | 1651 | out: |
283bc9f3 | 1652 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1653 | return err; |
1654 | } | |
1655 | EXPORT_SYMBOL(xfrm_state_walk); | |
1656 | ||
d3623099 | 1657 | void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto, |
870a2df4 | 1658 | struct xfrm_address_filter *filter) |
5c182458 | 1659 | { |
12a169e7 | 1660 | INIT_LIST_HEAD(&walk->all); |
5c182458 | 1661 | walk->proto = proto; |
12a169e7 HX |
1662 | walk->state = XFRM_STATE_DEAD; |
1663 | walk->seq = 0; | |
d3623099 | 1664 | walk->filter = filter; |
5c182458 HX |
1665 | } |
1666 | EXPORT_SYMBOL(xfrm_state_walk_init); | |
1667 | ||
283bc9f3 | 1668 | void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net) |
abb81c4f | 1669 | { |
d3623099 ND |
1670 | kfree(walk->filter); |
1671 | ||
12a169e7 | 1672 | if (list_empty(&walk->all)) |
5c182458 | 1673 | return; |
5c182458 | 1674 | |
283bc9f3 | 1675 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12a169e7 | 1676 | list_del(&walk->all); |
283bc9f3 | 1677 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
abb81c4f HX |
1678 | } |
1679 | EXPORT_SYMBOL(xfrm_state_walk_done); | |
1680 | ||
f8cd5488 JHS |
1681 | static void xfrm_replay_timer_handler(unsigned long data) |
1682 | { | |
3e94c2dc | 1683 | struct xfrm_state *x = (struct xfrm_state *)data; |
f8cd5488 JHS |
1684 | |
1685 | spin_lock(&x->lock); | |
1686 | ||
2717096a | 1687 | if (x->km.state == XFRM_STATE_VALID) { |
a6483b79 | 1688 | if (xfrm_aevent_is_on(xs_net(x))) |
9fdc4883 | 1689 | x->repl->notify(x, XFRM_REPLAY_TIMEOUT); |
2717096a JHS |
1690 | else |
1691 | x->xflags |= XFRM_TIME_DEFER; | |
1692 | } | |
f8cd5488 JHS |
1693 | |
1694 | spin_unlock(&x->lock); | |
1695 | } | |
1696 | ||
df01812e | 1697 | static LIST_HEAD(xfrm_km_list); |
1da177e4 | 1698 | |
214e005b | 1699 | void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
1da177e4 LT |
1700 | { |
1701 | struct xfrm_mgr *km; | |
1702 | ||
85168c00 CW |
1703 | rcu_read_lock(); |
1704 | list_for_each_entry_rcu(km, &xfrm_km_list, list) | |
26b15dad JHS |
1705 | if (km->notify_policy) |
1706 | km->notify_policy(xp, dir, c); | |
85168c00 | 1707 | rcu_read_unlock(); |
26b15dad | 1708 | } |
1da177e4 | 1709 | |
214e005b | 1710 | void km_state_notify(struct xfrm_state *x, const struct km_event *c) |
26b15dad JHS |
1711 | { |
1712 | struct xfrm_mgr *km; | |
85168c00 CW |
1713 | rcu_read_lock(); |
1714 | list_for_each_entry_rcu(km, &xfrm_km_list, list) | |
26b15dad JHS |
1715 | if (km->notify) |
1716 | km->notify(x, c); | |
85168c00 | 1717 | rcu_read_unlock(); |
26b15dad JHS |
1718 | } |
1719 | ||
1720 | EXPORT_SYMBOL(km_policy_notify); | |
1721 | EXPORT_SYMBOL(km_state_notify); | |
1722 | ||
15e47304 | 1723 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid) |
26b15dad JHS |
1724 | { |
1725 | struct km_event c; | |
1726 | ||
bf08867f | 1727 | c.data.hard = hard; |
15e47304 | 1728 | c.portid = portid; |
f60f6b8f | 1729 | c.event = XFRM_MSG_EXPIRE; |
26b15dad | 1730 | km_state_notify(x, &c); |
1da177e4 LT |
1731 | } |
1732 | ||
53bc6b4d | 1733 | EXPORT_SYMBOL(km_state_expired); |
26b15dad JHS |
1734 | /* |
1735 | * We send to all registered managers regardless of failure | |
1736 | * We are happy with one success | |
1737 | */ | |
980ebd25 | 1738 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol) |
1da177e4 | 1739 | { |
26b15dad | 1740 | int err = -EINVAL, acqret; |
1da177e4 LT |
1741 | struct xfrm_mgr *km; |
1742 | ||
85168c00 CW |
1743 | rcu_read_lock(); |
1744 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
65e0736b | 1745 | acqret = km->acquire(x, t, pol); |
26b15dad JHS |
1746 | if (!acqret) |
1747 | err = acqret; | |
1da177e4 | 1748 | } |
85168c00 | 1749 | rcu_read_unlock(); |
1da177e4 LT |
1750 | return err; |
1751 | } | |
980ebd25 | 1752 | EXPORT_SYMBOL(km_query); |
1da177e4 | 1753 | |
5d36b180 | 1754 | int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) |
1da177e4 LT |
1755 | { |
1756 | int err = -EINVAL; | |
1757 | struct xfrm_mgr *km; | |
1758 | ||
85168c00 CW |
1759 | rcu_read_lock(); |
1760 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
1da177e4 LT |
1761 | if (km->new_mapping) |
1762 | err = km->new_mapping(x, ipaddr, sport); | |
1763 | if (!err) | |
1764 | break; | |
1765 | } | |
85168c00 | 1766 | rcu_read_unlock(); |
1da177e4 LT |
1767 | return err; |
1768 | } | |
1769 | EXPORT_SYMBOL(km_new_mapping); | |
1770 | ||
15e47304 | 1771 | void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid) |
1da177e4 | 1772 | { |
26b15dad | 1773 | struct km_event c; |
1da177e4 | 1774 | |
bf08867f | 1775 | c.data.hard = hard; |
15e47304 | 1776 | c.portid = portid; |
f60f6b8f | 1777 | c.event = XFRM_MSG_POLEXPIRE; |
26b15dad | 1778 | km_policy_notify(pol, dir, &c); |
1da177e4 | 1779 | } |
a70fcb0b | 1780 | EXPORT_SYMBOL(km_policy_expired); |
1da177e4 | 1781 | |
2d60abc2 | 1782 | #ifdef CONFIG_XFRM_MIGRATE |
183cad12 DM |
1783 | int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1784 | const struct xfrm_migrate *m, int num_migrate, | |
1785 | const struct xfrm_kmaddress *k) | |
80c9abaa SS |
1786 | { |
1787 | int err = -EINVAL; | |
1788 | int ret; | |
1789 | struct xfrm_mgr *km; | |
1790 | ||
85168c00 CW |
1791 | rcu_read_lock(); |
1792 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
80c9abaa | 1793 | if (km->migrate) { |
13c1d189 | 1794 | ret = km->migrate(sel, dir, type, m, num_migrate, k); |
80c9abaa SS |
1795 | if (!ret) |
1796 | err = ret; | |
1797 | } | |
1798 | } | |
85168c00 | 1799 | rcu_read_unlock(); |
80c9abaa SS |
1800 | return err; |
1801 | } | |
1802 | EXPORT_SYMBOL(km_migrate); | |
2d60abc2 | 1803 | #endif |
80c9abaa | 1804 | |
db983c11 | 1805 | int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr) |
97a64b45 MN |
1806 | { |
1807 | int err = -EINVAL; | |
1808 | int ret; | |
1809 | struct xfrm_mgr *km; | |
1810 | ||
85168c00 CW |
1811 | rcu_read_lock(); |
1812 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
97a64b45 | 1813 | if (km->report) { |
db983c11 | 1814 | ret = km->report(net, proto, sel, addr); |
97a64b45 MN |
1815 | if (!ret) |
1816 | err = ret; | |
1817 | } | |
1818 | } | |
85168c00 | 1819 | rcu_read_unlock(); |
97a64b45 MN |
1820 | return err; |
1821 | } | |
1822 | EXPORT_SYMBOL(km_report); | |
1823 | ||
0f24558e HG |
1824 | bool km_is_alive(const struct km_event *c) |
1825 | { | |
1826 | struct xfrm_mgr *km; | |
1827 | bool is_alive = false; | |
1828 | ||
1829 | rcu_read_lock(); | |
1830 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
1831 | if (km->is_alive && km->is_alive(c)) { | |
1832 | is_alive = true; | |
1833 | break; | |
1834 | } | |
1835 | } | |
1836 | rcu_read_unlock(); | |
1837 | ||
1838 | return is_alive; | |
1839 | } | |
1840 | EXPORT_SYMBOL(km_is_alive); | |
1841 | ||
1da177e4 LT |
1842 | int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) |
1843 | { | |
1844 | int err; | |
1845 | u8 *data; | |
1846 | struct xfrm_mgr *km; | |
1847 | struct xfrm_policy *pol = NULL; | |
1848 | ||
1849 | if (optlen <= 0 || optlen > PAGE_SIZE) | |
1850 | return -EMSGSIZE; | |
1851 | ||
1852 | data = kmalloc(optlen, GFP_KERNEL); | |
1853 | if (!data) | |
1854 | return -ENOMEM; | |
1855 | ||
1856 | err = -EFAULT; | |
1857 | if (copy_from_user(data, optval, optlen)) | |
1858 | goto out; | |
1859 | ||
1860 | err = -EINVAL; | |
85168c00 CW |
1861 | rcu_read_lock(); |
1862 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
cb969f07 | 1863 | pol = km->compile_policy(sk, optname, data, |
1da177e4 LT |
1864 | optlen, &err); |
1865 | if (err >= 0) | |
1866 | break; | |
1867 | } | |
85168c00 | 1868 | rcu_read_unlock(); |
1da177e4 LT |
1869 | |
1870 | if (err >= 0) { | |
1871 | xfrm_sk_policy_insert(sk, err, pol); | |
1872 | xfrm_pol_put(pol); | |
1873 | err = 0; | |
1874 | } | |
1875 | ||
1876 | out: | |
1877 | kfree(data); | |
1878 | return err; | |
1879 | } | |
1880 | EXPORT_SYMBOL(xfrm_user_policy); | |
1881 | ||
85168c00 CW |
1882 | static DEFINE_SPINLOCK(xfrm_km_lock); |
1883 | ||
1da177e4 LT |
1884 | int xfrm_register_km(struct xfrm_mgr *km) |
1885 | { | |
85168c00 CW |
1886 | spin_lock_bh(&xfrm_km_lock); |
1887 | list_add_tail_rcu(&km->list, &xfrm_km_list); | |
1888 | spin_unlock_bh(&xfrm_km_lock); | |
1da177e4 LT |
1889 | return 0; |
1890 | } | |
1891 | EXPORT_SYMBOL(xfrm_register_km); | |
1892 | ||
1893 | int xfrm_unregister_km(struct xfrm_mgr *km) | |
1894 | { | |
85168c00 CW |
1895 | spin_lock_bh(&xfrm_km_lock); |
1896 | list_del_rcu(&km->list); | |
1897 | spin_unlock_bh(&xfrm_km_lock); | |
1898 | synchronize_rcu(); | |
1da177e4 LT |
1899 | return 0; |
1900 | } | |
1901 | EXPORT_SYMBOL(xfrm_unregister_km); | |
1902 | ||
1903 | int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo) | |
1904 | { | |
1905 | int err = 0; | |
1906 | if (unlikely(afinfo == NULL)) | |
1907 | return -EINVAL; | |
1908 | if (unlikely(afinfo->family >= NPROTO)) | |
1909 | return -EAFNOSUPPORT; | |
44abdc30 | 1910 | spin_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 | 1911 | if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL)) |
f31e8d4f | 1912 | err = -EEXIST; |
edcd5821 | 1913 | else |
44abdc30 CW |
1914 | rcu_assign_pointer(xfrm_state_afinfo[afinfo->family], afinfo); |
1915 | spin_unlock_bh(&xfrm_state_afinfo_lock); | |
1da177e4 LT |
1916 | return err; |
1917 | } | |
1918 | EXPORT_SYMBOL(xfrm_state_register_afinfo); | |
1919 | ||
1920 | int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo) | |
1921 | { | |
1922 | int err = 0; | |
1923 | if (unlikely(afinfo == NULL)) | |
1924 | return -EINVAL; | |
1925 | if (unlikely(afinfo->family >= NPROTO)) | |
1926 | return -EAFNOSUPPORT; | |
44abdc30 | 1927 | spin_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1928 | if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) { |
1929 | if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo)) | |
1930 | err = -EINVAL; | |
edcd5821 | 1931 | else |
44abdc30 | 1932 | RCU_INIT_POINTER(xfrm_state_afinfo[afinfo->family], NULL); |
1da177e4 | 1933 | } |
44abdc30 CW |
1934 | spin_unlock_bh(&xfrm_state_afinfo_lock); |
1935 | synchronize_rcu(); | |
1da177e4 LT |
1936 | return err; |
1937 | } | |
1938 | EXPORT_SYMBOL(xfrm_state_unregister_afinfo); | |
1939 | ||
628e341f | 1940 | struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family) |
1da177e4 LT |
1941 | { |
1942 | struct xfrm_state_afinfo *afinfo; | |
1943 | if (unlikely(family >= NPROTO)) | |
1944 | return NULL; | |
44abdc30 CW |
1945 | rcu_read_lock(); |
1946 | afinfo = rcu_dereference(xfrm_state_afinfo[family]); | |
546be240 | 1947 | if (unlikely(!afinfo)) |
44abdc30 | 1948 | rcu_read_unlock(); |
1da177e4 LT |
1949 | return afinfo; |
1950 | } | |
1951 | ||
628e341f | 1952 | void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo) |
1da177e4 | 1953 | { |
44abdc30 | 1954 | rcu_read_unlock(); |
1da177e4 LT |
1955 | } |
1956 | ||
1957 | /* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */ | |
1958 | void xfrm_state_delete_tunnel(struct xfrm_state *x) | |
1959 | { | |
1960 | if (x->tunnel) { | |
1961 | struct xfrm_state *t = x->tunnel; | |
1962 | ||
1963 | if (atomic_read(&t->tunnel_users) == 2) | |
1964 | xfrm_state_delete(t); | |
1965 | atomic_dec(&t->tunnel_users); | |
1966 | xfrm_state_put(t); | |
1967 | x->tunnel = NULL; | |
1968 | } | |
1969 | } | |
1970 | EXPORT_SYMBOL(xfrm_state_delete_tunnel); | |
1971 | ||
1972 | int xfrm_state_mtu(struct xfrm_state *x, int mtu) | |
1973 | { | |
c5c25238 | 1974 | int res; |
1da177e4 | 1975 | |
c5c25238 PM |
1976 | spin_lock_bh(&x->lock); |
1977 | if (x->km.state == XFRM_STATE_VALID && | |
1978 | x->type && x->type->get_mtu) | |
1979 | res = x->type->get_mtu(x, mtu); | |
1980 | else | |
28121617 | 1981 | res = mtu - x->props.header_len; |
c5c25238 | 1982 | spin_unlock_bh(&x->lock); |
1da177e4 LT |
1983 | return res; |
1984 | } | |
1985 | ||
a454f0cc | 1986 | int __xfrm_init_state(struct xfrm_state *x, bool init_replay) |
72cb6962 | 1987 | { |
d094cd83 | 1988 | struct xfrm_state_afinfo *afinfo; |
df9dcb45 | 1989 | struct xfrm_mode *inner_mode; |
d094cd83 | 1990 | int family = x->props.family; |
72cb6962 HX |
1991 | int err; |
1992 | ||
d094cd83 HX |
1993 | err = -EAFNOSUPPORT; |
1994 | afinfo = xfrm_state_get_afinfo(family); | |
1995 | if (!afinfo) | |
1996 | goto error; | |
1997 | ||
1998 | err = 0; | |
1999 | if (afinfo->init_flags) | |
2000 | err = afinfo->init_flags(x); | |
2001 | ||
2002 | xfrm_state_put_afinfo(afinfo); | |
2003 | ||
2004 | if (err) | |
2005 | goto error; | |
2006 | ||
2007 | err = -EPROTONOSUPPORT; | |
13996378 | 2008 | |
df9dcb45 KM |
2009 | if (x->sel.family != AF_UNSPEC) { |
2010 | inner_mode = xfrm_get_mode(x->props.mode, x->sel.family); | |
2011 | if (inner_mode == NULL) | |
2012 | goto error; | |
2013 | ||
2014 | if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) && | |
2015 | family != x->sel.family) { | |
2016 | xfrm_put_mode(inner_mode); | |
2017 | goto error; | |
2018 | } | |
2019 | ||
2020 | x->inner_mode = inner_mode; | |
2021 | } else { | |
2022 | struct xfrm_mode *inner_mode_iaf; | |
d81d2285 | 2023 | int iafamily = AF_INET; |
df9dcb45 | 2024 | |
d81d2285 | 2025 | inner_mode = xfrm_get_mode(x->props.mode, x->props.family); |
df9dcb45 KM |
2026 | if (inner_mode == NULL) |
2027 | goto error; | |
2028 | ||
2029 | if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) { | |
2030 | xfrm_put_mode(inner_mode); | |
2031 | goto error; | |
2032 | } | |
d81d2285 | 2033 | x->inner_mode = inner_mode; |
df9dcb45 | 2034 | |
d81d2285 MW |
2035 | if (x->props.family == AF_INET) |
2036 | iafamily = AF_INET6; | |
df9dcb45 | 2037 | |
d81d2285 MW |
2038 | inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily); |
2039 | if (inner_mode_iaf) { | |
2040 | if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL) | |
2041 | x->inner_mode_iaf = inner_mode_iaf; | |
2042 | else | |
2043 | xfrm_put_mode(inner_mode_iaf); | |
df9dcb45 KM |
2044 | } |
2045 | } | |
13996378 | 2046 | |
d094cd83 | 2047 | x->type = xfrm_get_type(x->id.proto, family); |
72cb6962 HX |
2048 | if (x->type == NULL) |
2049 | goto error; | |
2050 | ||
2051 | err = x->type->init_state(x); | |
2052 | if (err) | |
2053 | goto error; | |
2054 | ||
13996378 | 2055 | x->outer_mode = xfrm_get_mode(x->props.mode, family); |
599901c3 JL |
2056 | if (x->outer_mode == NULL) { |
2057 | err = -EPROTONOSUPPORT; | |
b59f45d0 | 2058 | goto error; |
599901c3 | 2059 | } |
b59f45d0 | 2060 | |
a454f0cc WY |
2061 | if (init_replay) { |
2062 | err = xfrm_init_replay(x); | |
2063 | if (err) | |
2064 | goto error; | |
2065 | } | |
2066 | ||
72cb6962 HX |
2067 | x->km.state = XFRM_STATE_VALID; |
2068 | ||
2069 | error: | |
2070 | return err; | |
2071 | } | |
2072 | ||
a454f0cc WY |
2073 | EXPORT_SYMBOL(__xfrm_init_state); |
2074 | ||
2075 | int xfrm_init_state(struct xfrm_state *x) | |
2076 | { | |
2077 | return __xfrm_init_state(x, true); | |
2078 | } | |
2079 | ||
72cb6962 | 2080 | EXPORT_SYMBOL(xfrm_init_state); |
a716c119 | 2081 | |
d62ddc21 | 2082 | int __net_init xfrm_state_init(struct net *net) |
1da177e4 | 2083 | { |
f034b5d4 DM |
2084 | unsigned int sz; |
2085 | ||
9d4139c7 AD |
2086 | INIT_LIST_HEAD(&net->xfrm.state_all); |
2087 | ||
f034b5d4 DM |
2088 | sz = sizeof(struct hlist_head) * 8; |
2089 | ||
73d189dc AD |
2090 | net->xfrm.state_bydst = xfrm_hash_alloc(sz); |
2091 | if (!net->xfrm.state_bydst) | |
2092 | goto out_bydst; | |
d320bbb3 AD |
2093 | net->xfrm.state_bysrc = xfrm_hash_alloc(sz); |
2094 | if (!net->xfrm.state_bysrc) | |
2095 | goto out_bysrc; | |
b754a4fd AD |
2096 | net->xfrm.state_byspi = xfrm_hash_alloc(sz); |
2097 | if (!net->xfrm.state_byspi) | |
2098 | goto out_byspi; | |
529983ec | 2099 | net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1); |
1da177e4 | 2100 | |
0bf7c5b0 | 2101 | net->xfrm.state_num = 0; |
63082733 | 2102 | INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize); |
b8a0ae20 | 2103 | INIT_HLIST_HEAD(&net->xfrm.state_gc_list); |
c7837144 | 2104 | INIT_WORK(&net->xfrm.state_gc_work, xfrm_state_gc_task); |
283bc9f3 | 2105 | spin_lock_init(&net->xfrm.xfrm_state_lock); |
d62ddc21 | 2106 | return 0; |
73d189dc | 2107 | |
b754a4fd AD |
2108 | out_byspi: |
2109 | xfrm_hash_free(net->xfrm.state_bysrc, sz); | |
d320bbb3 AD |
2110 | out_bysrc: |
2111 | xfrm_hash_free(net->xfrm.state_bydst, sz); | |
73d189dc AD |
2112 | out_bydst: |
2113 | return -ENOMEM; | |
d62ddc21 AD |
2114 | } |
2115 | ||
2116 | void xfrm_state_fini(struct net *net) | |
2117 | { | |
73d189dc AD |
2118 | unsigned int sz; |
2119 | ||
7c2776ee | 2120 | flush_work(&net->xfrm.state_hash_work); |
2e71029e | 2121 | xfrm_state_flush(net, IPSEC_PROTO_ANY, false); |
7c2776ee AD |
2122 | flush_work(&net->xfrm.state_gc_work); |
2123 | ||
9d4139c7 | 2124 | WARN_ON(!list_empty(&net->xfrm.state_all)); |
73d189dc | 2125 | |
529983ec | 2126 | sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head); |
b754a4fd AD |
2127 | WARN_ON(!hlist_empty(net->xfrm.state_byspi)); |
2128 | xfrm_hash_free(net->xfrm.state_byspi, sz); | |
d320bbb3 AD |
2129 | WARN_ON(!hlist_empty(net->xfrm.state_bysrc)); |
2130 | xfrm_hash_free(net->xfrm.state_bysrc, sz); | |
73d189dc AD |
2131 | WARN_ON(!hlist_empty(net->xfrm.state_bydst)); |
2132 | xfrm_hash_free(net->xfrm.state_bydst, sz); | |
1da177e4 LT |
2133 | } |
2134 | ||
ab5f5e8b | 2135 | #ifdef CONFIG_AUDITSYSCALL |
cf35f43e IJ |
2136 | static void xfrm_audit_helper_sainfo(struct xfrm_state *x, |
2137 | struct audit_buffer *audit_buf) | |
ab5f5e8b | 2138 | { |
68277acc PM |
2139 | struct xfrm_sec_ctx *ctx = x->security; |
2140 | u32 spi = ntohl(x->id.spi); | |
2141 | ||
2142 | if (ctx) | |
ab5f5e8b | 2143 | audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s", |
68277acc | 2144 | ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str); |
ab5f5e8b | 2145 | |
9b7a787d | 2146 | switch (x->props.family) { |
ab5f5e8b | 2147 | case AF_INET: |
21454aaa HH |
2148 | audit_log_format(audit_buf, " src=%pI4 dst=%pI4", |
2149 | &x->props.saddr.a4, &x->id.daddr.a4); | |
ab5f5e8b JL |
2150 | break; |
2151 | case AF_INET6: | |
5b095d98 | 2152 | audit_log_format(audit_buf, " src=%pI6 dst=%pI6", |
fdb46ee7 | 2153 | x->props.saddr.a6, x->id.daddr.a6); |
ab5f5e8b JL |
2154 | break; |
2155 | } | |
68277acc PM |
2156 | |
2157 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
ab5f5e8b JL |
2158 | } |
2159 | ||
cf35f43e IJ |
2160 | static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family, |
2161 | struct audit_buffer *audit_buf) | |
afeb14b4 | 2162 | { |
b71d1d42 ED |
2163 | const struct iphdr *iph4; |
2164 | const struct ipv6hdr *iph6; | |
afeb14b4 PM |
2165 | |
2166 | switch (family) { | |
2167 | case AF_INET: | |
2168 | iph4 = ip_hdr(skb); | |
21454aaa HH |
2169 | audit_log_format(audit_buf, " src=%pI4 dst=%pI4", |
2170 | &iph4->saddr, &iph4->daddr); | |
afeb14b4 PM |
2171 | break; |
2172 | case AF_INET6: | |
2173 | iph6 = ipv6_hdr(skb); | |
2174 | audit_log_format(audit_buf, | |
5b095d98 | 2175 | " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x", |
9b7a787d | 2176 | &iph6->saddr, &iph6->daddr, |
afeb14b4 PM |
2177 | iph6->flow_lbl[0] & 0x0f, |
2178 | iph6->flow_lbl[1], | |
2179 | iph6->flow_lbl[2]); | |
2180 | break; | |
2181 | } | |
2182 | } | |
2183 | ||
2e71029e | 2184 | void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid) |
ab5f5e8b JL |
2185 | { |
2186 | struct audit_buffer *audit_buf; | |
ab5f5e8b | 2187 | |
afeb14b4 | 2188 | audit_buf = xfrm_audit_start("SAD-add"); |
ab5f5e8b JL |
2189 | if (audit_buf == NULL) |
2190 | return; | |
2e71029e | 2191 | xfrm_audit_helper_usrinfo(task_valid, audit_buf); |
afeb14b4 PM |
2192 | xfrm_audit_helper_sainfo(x, audit_buf); |
2193 | audit_log_format(audit_buf, " res=%u", result); | |
ab5f5e8b JL |
2194 | audit_log_end(audit_buf); |
2195 | } | |
2196 | EXPORT_SYMBOL_GPL(xfrm_audit_state_add); | |
2197 | ||
2e71029e | 2198 | void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid) |
ab5f5e8b JL |
2199 | { |
2200 | struct audit_buffer *audit_buf; | |
ab5f5e8b | 2201 | |
afeb14b4 | 2202 | audit_buf = xfrm_audit_start("SAD-delete"); |
ab5f5e8b JL |
2203 | if (audit_buf == NULL) |
2204 | return; | |
2e71029e | 2205 | xfrm_audit_helper_usrinfo(task_valid, audit_buf); |
afeb14b4 PM |
2206 | xfrm_audit_helper_sainfo(x, audit_buf); |
2207 | audit_log_format(audit_buf, " res=%u", result); | |
ab5f5e8b JL |
2208 | audit_log_end(audit_buf); |
2209 | } | |
2210 | EXPORT_SYMBOL_GPL(xfrm_audit_state_delete); | |
afeb14b4 PM |
2211 | |
2212 | void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
2213 | struct sk_buff *skb) | |
2214 | { | |
2215 | struct audit_buffer *audit_buf; | |
2216 | u32 spi; | |
2217 | ||
2218 | audit_buf = xfrm_audit_start("SA-replay-overflow"); | |
2219 | if (audit_buf == NULL) | |
2220 | return; | |
2221 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2222 | /* don't record the sequence number because it's inherent in this kind | |
2223 | * of audit message */ | |
2224 | spi = ntohl(x->id.spi); | |
2225 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
2226 | audit_log_end(audit_buf); | |
2227 | } | |
2228 | EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow); | |
2229 | ||
9fdc4883 | 2230 | void xfrm_audit_state_replay(struct xfrm_state *x, |
afeb14b4 PM |
2231 | struct sk_buff *skb, __be32 net_seq) |
2232 | { | |
2233 | struct audit_buffer *audit_buf; | |
2234 | u32 spi; | |
2235 | ||
2236 | audit_buf = xfrm_audit_start("SA-replayed-pkt"); | |
2237 | if (audit_buf == NULL) | |
2238 | return; | |
2239 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2240 | spi = ntohl(x->id.spi); | |
2241 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2242 | spi, spi, ntohl(net_seq)); | |
2243 | audit_log_end(audit_buf); | |
2244 | } | |
9fdc4883 | 2245 | EXPORT_SYMBOL_GPL(xfrm_audit_state_replay); |
afeb14b4 PM |
2246 | |
2247 | void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family) | |
2248 | { | |
2249 | struct audit_buffer *audit_buf; | |
2250 | ||
2251 | audit_buf = xfrm_audit_start("SA-notfound"); | |
2252 | if (audit_buf == NULL) | |
2253 | return; | |
2254 | xfrm_audit_helper_pktinfo(skb, family, audit_buf); | |
2255 | audit_log_end(audit_buf); | |
2256 | } | |
2257 | EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple); | |
2258 | ||
2259 | void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
2260 | __be32 net_spi, __be32 net_seq) | |
2261 | { | |
2262 | struct audit_buffer *audit_buf; | |
2263 | u32 spi; | |
2264 | ||
2265 | audit_buf = xfrm_audit_start("SA-notfound"); | |
2266 | if (audit_buf == NULL) | |
2267 | return; | |
2268 | xfrm_audit_helper_pktinfo(skb, family, audit_buf); | |
2269 | spi = ntohl(net_spi); | |
2270 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2271 | spi, spi, ntohl(net_seq)); | |
2272 | audit_log_end(audit_buf); | |
2273 | } | |
2274 | EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound); | |
2275 | ||
2276 | void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
2277 | struct sk_buff *skb, u8 proto) | |
2278 | { | |
2279 | struct audit_buffer *audit_buf; | |
2280 | __be32 net_spi; | |
2281 | __be32 net_seq; | |
2282 | ||
2283 | audit_buf = xfrm_audit_start("SA-icv-failure"); | |
2284 | if (audit_buf == NULL) | |
2285 | return; | |
2286 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2287 | if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) { | |
2288 | u32 spi = ntohl(net_spi); | |
2289 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2290 | spi, spi, ntohl(net_seq)); | |
2291 | } | |
2292 | audit_log_end(audit_buf); | |
2293 | } | |
2294 | EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail); | |
ab5f5e8b | 2295 | #endif /* CONFIG_AUDITSYSCALL */ |