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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 | ||
100 | static DEFINE_MUTEX(hash_resize_mutex); | |
101 | ||
63082733 | 102 | static void xfrm_hash_resize(struct work_struct *work) |
f034b5d4 | 103 | { |
63082733 | 104 | struct net *net = container_of(work, struct net, xfrm.state_hash_work); |
f034b5d4 DM |
105 | struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi; |
106 | unsigned long nsize, osize; | |
107 | unsigned int nhashmask, ohashmask; | |
108 | int i; | |
109 | ||
110 | mutex_lock(&hash_resize_mutex); | |
111 | ||
63082733 | 112 | nsize = xfrm_hash_new_size(net->xfrm.state_hmask); |
44e36b42 | 113 | ndst = xfrm_hash_alloc(nsize); |
f034b5d4 DM |
114 | if (!ndst) |
115 | goto out_unlock; | |
44e36b42 | 116 | nsrc = xfrm_hash_alloc(nsize); |
f034b5d4 | 117 | if (!nsrc) { |
44e36b42 | 118 | xfrm_hash_free(ndst, nsize); |
f034b5d4 DM |
119 | goto out_unlock; |
120 | } | |
44e36b42 | 121 | nspi = xfrm_hash_alloc(nsize); |
f034b5d4 | 122 | if (!nspi) { |
44e36b42 DM |
123 | xfrm_hash_free(ndst, nsize); |
124 | xfrm_hash_free(nsrc, nsize); | |
f034b5d4 DM |
125 | goto out_unlock; |
126 | } | |
127 | ||
283bc9f3 | 128 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
f034b5d4 DM |
129 | |
130 | nhashmask = (nsize / sizeof(struct hlist_head)) - 1U; | |
63082733 AD |
131 | for (i = net->xfrm.state_hmask; i >= 0; i--) |
132 | xfrm_hash_transfer(net->xfrm.state_bydst+i, ndst, nsrc, nspi, | |
f034b5d4 DM |
133 | nhashmask); |
134 | ||
63082733 AD |
135 | odst = net->xfrm.state_bydst; |
136 | osrc = net->xfrm.state_bysrc; | |
137 | ospi = net->xfrm.state_byspi; | |
138 | ohashmask = net->xfrm.state_hmask; | |
f034b5d4 | 139 | |
63082733 AD |
140 | net->xfrm.state_bydst = ndst; |
141 | net->xfrm.state_bysrc = nsrc; | |
142 | net->xfrm.state_byspi = nspi; | |
143 | net->xfrm.state_hmask = nhashmask; | |
f034b5d4 | 144 | |
283bc9f3 | 145 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
f034b5d4 DM |
146 | |
147 | osize = (ohashmask + 1) * sizeof(struct hlist_head); | |
44e36b42 DM |
148 | xfrm_hash_free(odst, osize); |
149 | xfrm_hash_free(osrc, osize); | |
150 | xfrm_hash_free(ospi, osize); | |
f034b5d4 DM |
151 | |
152 | out_unlock: | |
153 | mutex_unlock(&hash_resize_mutex); | |
154 | } | |
155 | ||
44abdc30 CW |
156 | static DEFINE_SPINLOCK(xfrm_state_afinfo_lock); |
157 | static struct xfrm_state_afinfo __rcu *xfrm_state_afinfo[NPROTO]; | |
1da177e4 | 158 | |
1da177e4 LT |
159 | static DEFINE_SPINLOCK(xfrm_state_gc_lock); |
160 | ||
53bc6b4d | 161 | int __xfrm_state_delete(struct xfrm_state *x); |
1da177e4 | 162 | |
980ebd25 | 163 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); |
15e47304 | 164 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid); |
1da177e4 | 165 | |
7a9885b9 | 166 | static DEFINE_SPINLOCK(xfrm_type_lock); |
533cb5b0 | 167 | int xfrm_register_type(const struct xfrm_type *type, unsigned short family) |
aa5d62cc | 168 | { |
7a9885b9 | 169 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); |
533cb5b0 | 170 | const struct xfrm_type **typemap; |
aa5d62cc HX |
171 | int err = 0; |
172 | ||
173 | if (unlikely(afinfo == NULL)) | |
174 | return -EAFNOSUPPORT; | |
175 | typemap = afinfo->type_map; | |
7a9885b9 | 176 | spin_lock_bh(&xfrm_type_lock); |
aa5d62cc HX |
177 | |
178 | if (likely(typemap[type->proto] == NULL)) | |
179 | typemap[type->proto] = type; | |
180 | else | |
181 | err = -EEXIST; | |
7a9885b9 CW |
182 | spin_unlock_bh(&xfrm_type_lock); |
183 | xfrm_state_put_afinfo(afinfo); | |
aa5d62cc HX |
184 | return err; |
185 | } | |
186 | EXPORT_SYMBOL(xfrm_register_type); | |
187 | ||
533cb5b0 | 188 | int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family) |
aa5d62cc | 189 | { |
7a9885b9 | 190 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); |
533cb5b0 | 191 | const struct xfrm_type **typemap; |
aa5d62cc HX |
192 | int err = 0; |
193 | ||
194 | if (unlikely(afinfo == NULL)) | |
195 | return -EAFNOSUPPORT; | |
196 | typemap = afinfo->type_map; | |
7a9885b9 | 197 | spin_lock_bh(&xfrm_type_lock); |
aa5d62cc HX |
198 | |
199 | if (unlikely(typemap[type->proto] != type)) | |
200 | err = -ENOENT; | |
201 | else | |
202 | typemap[type->proto] = NULL; | |
7a9885b9 CW |
203 | spin_unlock_bh(&xfrm_type_lock); |
204 | xfrm_state_put_afinfo(afinfo); | |
aa5d62cc HX |
205 | return err; |
206 | } | |
207 | EXPORT_SYMBOL(xfrm_unregister_type); | |
208 | ||
533cb5b0 | 209 | static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family) |
aa5d62cc HX |
210 | { |
211 | struct xfrm_state_afinfo *afinfo; | |
533cb5b0 ED |
212 | const struct xfrm_type **typemap; |
213 | const struct xfrm_type *type; | |
aa5d62cc HX |
214 | int modload_attempted = 0; |
215 | ||
216 | retry: | |
217 | afinfo = xfrm_state_get_afinfo(family); | |
218 | if (unlikely(afinfo == NULL)) | |
219 | return NULL; | |
220 | typemap = afinfo->type_map; | |
221 | ||
222 | type = typemap[proto]; | |
223 | if (unlikely(type && !try_module_get(type->owner))) | |
224 | type = NULL; | |
225 | if (!type && !modload_attempted) { | |
226 | xfrm_state_put_afinfo(afinfo); | |
227 | request_module("xfrm-type-%d-%d", family, proto); | |
228 | modload_attempted = 1; | |
229 | goto retry; | |
230 | } | |
231 | ||
232 | xfrm_state_put_afinfo(afinfo); | |
233 | return type; | |
234 | } | |
235 | ||
533cb5b0 | 236 | static void xfrm_put_type(const struct xfrm_type *type) |
aa5d62cc HX |
237 | { |
238 | module_put(type->owner); | |
239 | } | |
240 | ||
7a9885b9 | 241 | static DEFINE_SPINLOCK(xfrm_mode_lock); |
aa5d62cc HX |
242 | int xfrm_register_mode(struct xfrm_mode *mode, int family) |
243 | { | |
244 | struct xfrm_state_afinfo *afinfo; | |
245 | struct xfrm_mode **modemap; | |
246 | int err; | |
247 | ||
248 | if (unlikely(mode->encap >= XFRM_MODE_MAX)) | |
249 | return -EINVAL; | |
250 | ||
7a9885b9 | 251 | afinfo = xfrm_state_get_afinfo(family); |
aa5d62cc HX |
252 | if (unlikely(afinfo == NULL)) |
253 | return -EAFNOSUPPORT; | |
254 | ||
255 | err = -EEXIST; | |
256 | modemap = afinfo->mode_map; | |
7a9885b9 | 257 | spin_lock_bh(&xfrm_mode_lock); |
17c2a42a HX |
258 | if (modemap[mode->encap]) |
259 | goto out; | |
aa5d62cc | 260 | |
17c2a42a HX |
261 | err = -ENOENT; |
262 | if (!try_module_get(afinfo->owner)) | |
263 | goto out; | |
264 | ||
265 | mode->afinfo = afinfo; | |
266 | modemap[mode->encap] = mode; | |
267 | err = 0; | |
268 | ||
269 | out: | |
7a9885b9 CW |
270 | spin_unlock_bh(&xfrm_mode_lock); |
271 | xfrm_state_put_afinfo(afinfo); | |
aa5d62cc HX |
272 | return err; |
273 | } | |
274 | EXPORT_SYMBOL(xfrm_register_mode); | |
275 | ||
276 | int xfrm_unregister_mode(struct xfrm_mode *mode, int family) | |
277 | { | |
278 | struct xfrm_state_afinfo *afinfo; | |
279 | struct xfrm_mode **modemap; | |
280 | int err; | |
281 | ||
282 | if (unlikely(mode->encap >= XFRM_MODE_MAX)) | |
283 | return -EINVAL; | |
284 | ||
7a9885b9 | 285 | afinfo = xfrm_state_get_afinfo(family); |
aa5d62cc HX |
286 | if (unlikely(afinfo == NULL)) |
287 | return -EAFNOSUPPORT; | |
288 | ||
289 | err = -ENOENT; | |
290 | modemap = afinfo->mode_map; | |
7a9885b9 | 291 | spin_lock_bh(&xfrm_mode_lock); |
aa5d62cc HX |
292 | if (likely(modemap[mode->encap] == mode)) { |
293 | modemap[mode->encap] = NULL; | |
17c2a42a | 294 | module_put(mode->afinfo->owner); |
aa5d62cc HX |
295 | err = 0; |
296 | } | |
297 | ||
7a9885b9 CW |
298 | spin_unlock_bh(&xfrm_mode_lock); |
299 | xfrm_state_put_afinfo(afinfo); | |
aa5d62cc HX |
300 | return err; |
301 | } | |
302 | EXPORT_SYMBOL(xfrm_unregister_mode); | |
303 | ||
304 | static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family) | |
305 | { | |
306 | struct xfrm_state_afinfo *afinfo; | |
307 | struct xfrm_mode *mode; | |
308 | int modload_attempted = 0; | |
309 | ||
310 | if (unlikely(encap >= XFRM_MODE_MAX)) | |
311 | return NULL; | |
312 | ||
313 | retry: | |
314 | afinfo = xfrm_state_get_afinfo(family); | |
315 | if (unlikely(afinfo == NULL)) | |
316 | return NULL; | |
317 | ||
318 | mode = afinfo->mode_map[encap]; | |
319 | if (unlikely(mode && !try_module_get(mode->owner))) | |
320 | mode = NULL; | |
321 | if (!mode && !modload_attempted) { | |
322 | xfrm_state_put_afinfo(afinfo); | |
323 | request_module("xfrm-mode-%d-%d", family, encap); | |
324 | modload_attempted = 1; | |
325 | goto retry; | |
326 | } | |
327 | ||
328 | xfrm_state_put_afinfo(afinfo); | |
329 | return mode; | |
330 | } | |
331 | ||
332 | static void xfrm_put_mode(struct xfrm_mode *mode) | |
333 | { | |
334 | module_put(mode->owner); | |
335 | } | |
336 | ||
1da177e4 LT |
337 | static void xfrm_state_gc_destroy(struct xfrm_state *x) |
338 | { | |
9e0d57fd | 339 | tasklet_hrtimer_cancel(&x->mtimer); |
a47f0ce0 | 340 | del_timer_sync(&x->rtimer); |
a51482bd JJ |
341 | kfree(x->aalg); |
342 | kfree(x->ealg); | |
343 | kfree(x->calg); | |
344 | kfree(x->encap); | |
060f02a3 | 345 | kfree(x->coaddr); |
d8647b79 SK |
346 | kfree(x->replay_esn); |
347 | kfree(x->preplay_esn); | |
13996378 HX |
348 | if (x->inner_mode) |
349 | xfrm_put_mode(x->inner_mode); | |
df9dcb45 KM |
350 | if (x->inner_mode_iaf) |
351 | xfrm_put_mode(x->inner_mode_iaf); | |
13996378 HX |
352 | if (x->outer_mode) |
353 | xfrm_put_mode(x->outer_mode); | |
1da177e4 LT |
354 | if (x->type) { |
355 | x->type->destructor(x); | |
356 | xfrm_put_type(x->type); | |
357 | } | |
df71837d | 358 | security_xfrm_state_free(x); |
1da177e4 LT |
359 | kfree(x); |
360 | } | |
361 | ||
c7837144 | 362 | static void xfrm_state_gc_task(struct work_struct *work) |
1da177e4 | 363 | { |
c7837144 | 364 | struct net *net = container_of(work, struct net, xfrm.state_gc_work); |
12a169e7 | 365 | struct xfrm_state *x; |
b67bfe0d | 366 | struct hlist_node *tmp; |
12a169e7 | 367 | struct hlist_head gc_list; |
1da177e4 | 368 | |
1da177e4 | 369 | spin_lock_bh(&xfrm_state_gc_lock); |
c7837144 | 370 | hlist_move_list(&net->xfrm.state_gc_list, &gc_list); |
1da177e4 LT |
371 | spin_unlock_bh(&xfrm_state_gc_lock); |
372 | ||
b67bfe0d | 373 | hlist_for_each_entry_safe(x, tmp, &gc_list, gclist) |
1da177e4 | 374 | xfrm_state_gc_destroy(x); |
1da177e4 LT |
375 | } |
376 | ||
377 | static inline unsigned long make_jiffies(long secs) | |
378 | { | |
379 | if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ) | |
380 | return MAX_SCHEDULE_TIMEOUT-1; | |
381 | else | |
a716c119 | 382 | return secs*HZ; |
1da177e4 LT |
383 | } |
384 | ||
3e94c2dc | 385 | static enum hrtimer_restart xfrm_timer_handler(struct hrtimer *me) |
1da177e4 | 386 | { |
9e0d57fd YP |
387 | struct tasklet_hrtimer *thr = container_of(me, struct tasklet_hrtimer, timer); |
388 | struct xfrm_state *x = container_of(thr, struct xfrm_state, mtimer); | |
9d729f72 | 389 | unsigned long now = get_seconds(); |
1da177e4 LT |
390 | long next = LONG_MAX; |
391 | int warn = 0; | |
161a09e7 | 392 | int err = 0; |
1da177e4 LT |
393 | |
394 | spin_lock(&x->lock); | |
395 | if (x->km.state == XFRM_STATE_DEAD) | |
396 | goto out; | |
397 | if (x->km.state == XFRM_STATE_EXPIRED) | |
398 | goto expired; | |
399 | if (x->lft.hard_add_expires_seconds) { | |
400 | long tmo = x->lft.hard_add_expires_seconds + | |
401 | x->curlft.add_time - now; | |
e3c0d047 FD |
402 | if (tmo <= 0) { |
403 | if (x->xflags & XFRM_SOFT_EXPIRE) { | |
404 | /* enter hard expire without soft expire first?! | |
405 | * setting a new date could trigger this. | |
406 | * workarbound: fix x->curflt.add_time by below: | |
407 | */ | |
408 | x->curlft.add_time = now - x->saved_tmo - 1; | |
409 | tmo = x->lft.hard_add_expires_seconds - x->saved_tmo; | |
410 | } else | |
411 | goto expired; | |
412 | } | |
1da177e4 LT |
413 | if (tmo < next) |
414 | next = tmo; | |
415 | } | |
416 | if (x->lft.hard_use_expires_seconds) { | |
417 | long tmo = x->lft.hard_use_expires_seconds + | |
418 | (x->curlft.use_time ? : now) - now; | |
419 | if (tmo <= 0) | |
420 | goto expired; | |
421 | if (tmo < next) | |
422 | next = tmo; | |
423 | } | |
424 | if (x->km.dying) | |
425 | goto resched; | |
426 | if (x->lft.soft_add_expires_seconds) { | |
427 | long tmo = x->lft.soft_add_expires_seconds + | |
428 | x->curlft.add_time - now; | |
e3c0d047 | 429 | if (tmo <= 0) { |
1da177e4 | 430 | warn = 1; |
e3c0d047 FD |
431 | x->xflags &= ~XFRM_SOFT_EXPIRE; |
432 | } else if (tmo < next) { | |
1da177e4 | 433 | next = tmo; |
e3c0d047 FD |
434 | x->xflags |= XFRM_SOFT_EXPIRE; |
435 | x->saved_tmo = tmo; | |
436 | } | |
1da177e4 LT |
437 | } |
438 | if (x->lft.soft_use_expires_seconds) { | |
439 | long tmo = x->lft.soft_use_expires_seconds + | |
440 | (x->curlft.use_time ? : now) - now; | |
441 | if (tmo <= 0) | |
442 | warn = 1; | |
443 | else if (tmo < next) | |
444 | next = tmo; | |
445 | } | |
446 | ||
4666faab | 447 | x->km.dying = warn; |
1da177e4 | 448 | if (warn) |
53bc6b4d | 449 | km_state_expired(x, 0, 0); |
1da177e4 | 450 | resched: |
9b7a787d | 451 | if (next != LONG_MAX) { |
9e0d57fd YP |
452 | tasklet_hrtimer_start(&x->mtimer, ktime_set(next, 0), HRTIMER_MODE_REL); |
453 | } | |
a47f0ce0 | 454 | |
1da177e4 LT |
455 | goto out; |
456 | ||
457 | expired: | |
5b8ef341 | 458 | if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) |
1da177e4 | 459 | x->km.state = XFRM_STATE_EXPIRED; |
161a09e7 JL |
460 | |
461 | err = __xfrm_state_delete(x); | |
0806ae4c | 462 | if (!err) |
53bc6b4d | 463 | km_state_expired(x, 1, 0); |
1da177e4 | 464 | |
ab5f5e8b | 465 | xfrm_audit_state_delete(x, err ? 0 : 1, |
2532386f EP |
466 | audit_get_loginuid(current), |
467 | audit_get_sessionid(current), 0); | |
161a09e7 | 468 | |
1da177e4 LT |
469 | out: |
470 | spin_unlock(&x->lock); | |
9e0d57fd | 471 | return HRTIMER_NORESTART; |
1da177e4 LT |
472 | } |
473 | ||
0ac84752 DM |
474 | static void xfrm_replay_timer_handler(unsigned long data); |
475 | ||
673c09be | 476 | struct xfrm_state *xfrm_state_alloc(struct net *net) |
1da177e4 LT |
477 | { |
478 | struct xfrm_state *x; | |
479 | ||
0da974f4 | 480 | x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC); |
1da177e4 LT |
481 | |
482 | if (x) { | |
673c09be | 483 | write_pnet(&x->xs_net, net); |
1da177e4 LT |
484 | atomic_set(&x->refcnt, 1); |
485 | atomic_set(&x->tunnel_users, 0); | |
12a169e7 | 486 | INIT_LIST_HEAD(&x->km.all); |
8f126e37 DM |
487 | INIT_HLIST_NODE(&x->bydst); |
488 | INIT_HLIST_NODE(&x->bysrc); | |
489 | INIT_HLIST_NODE(&x->byspi); | |
99565a6c FD |
490 | tasklet_hrtimer_init(&x->mtimer, xfrm_timer_handler, |
491 | CLOCK_BOOTTIME, HRTIMER_MODE_ABS); | |
b24b8a24 PE |
492 | setup_timer(&x->rtimer, xfrm_replay_timer_handler, |
493 | (unsigned long)x); | |
9d729f72 | 494 | x->curlft.add_time = get_seconds(); |
1da177e4 LT |
495 | x->lft.soft_byte_limit = XFRM_INF; |
496 | x->lft.soft_packet_limit = XFRM_INF; | |
497 | x->lft.hard_byte_limit = XFRM_INF; | |
498 | x->lft.hard_packet_limit = XFRM_INF; | |
f8cd5488 JHS |
499 | x->replay_maxage = 0; |
500 | x->replay_maxdiff = 0; | |
df9dcb45 KM |
501 | x->inner_mode = NULL; |
502 | x->inner_mode_iaf = NULL; | |
1da177e4 LT |
503 | spin_lock_init(&x->lock); |
504 | } | |
505 | return x; | |
506 | } | |
507 | EXPORT_SYMBOL(xfrm_state_alloc); | |
508 | ||
509 | void __xfrm_state_destroy(struct xfrm_state *x) | |
510 | { | |
98806f75 AD |
511 | struct net *net = xs_net(x); |
512 | ||
547b792c | 513 | WARN_ON(x->km.state != XFRM_STATE_DEAD); |
1da177e4 LT |
514 | |
515 | spin_lock_bh(&xfrm_state_gc_lock); | |
98806f75 | 516 | hlist_add_head(&x->gclist, &net->xfrm.state_gc_list); |
1da177e4 | 517 | spin_unlock_bh(&xfrm_state_gc_lock); |
98806f75 | 518 | schedule_work(&net->xfrm.state_gc_work); |
1da177e4 LT |
519 | } |
520 | EXPORT_SYMBOL(__xfrm_state_destroy); | |
521 | ||
53bc6b4d | 522 | int __xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 523 | { |
98806f75 | 524 | struct net *net = xs_net(x); |
26b15dad JHS |
525 | int err = -ESRCH; |
526 | ||
1da177e4 LT |
527 | if (x->km.state != XFRM_STATE_DEAD) { |
528 | x->km.state = XFRM_STATE_DEAD; | |
283bc9f3 | 529 | spin_lock(&net->xfrm.xfrm_state_lock); |
12a169e7 | 530 | list_del(&x->km.all); |
8f126e37 | 531 | hlist_del(&x->bydst); |
8f126e37 | 532 | hlist_del(&x->bysrc); |
a47f0ce0 | 533 | if (x->id.spi) |
8f126e37 | 534 | hlist_del(&x->byspi); |
98806f75 | 535 | net->xfrm.state_num--; |
283bc9f3 | 536 | spin_unlock(&net->xfrm.xfrm_state_lock); |
1da177e4 | 537 | |
1da177e4 LT |
538 | /* All xfrm_state objects are created by xfrm_state_alloc. |
539 | * The xfrm_state_alloc call gives a reference, and that | |
540 | * is what we are dropping here. | |
541 | */ | |
5dba4797 | 542 | xfrm_state_put(x); |
26b15dad | 543 | err = 0; |
1da177e4 | 544 | } |
26b15dad JHS |
545 | |
546 | return err; | |
1da177e4 | 547 | } |
53bc6b4d | 548 | EXPORT_SYMBOL(__xfrm_state_delete); |
1da177e4 | 549 | |
26b15dad | 550 | int xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 551 | { |
26b15dad JHS |
552 | int err; |
553 | ||
1da177e4 | 554 | spin_lock_bh(&x->lock); |
26b15dad | 555 | err = __xfrm_state_delete(x); |
1da177e4 | 556 | spin_unlock_bh(&x->lock); |
26b15dad JHS |
557 | |
558 | return err; | |
1da177e4 LT |
559 | } |
560 | EXPORT_SYMBOL(xfrm_state_delete); | |
561 | ||
4aa2e62c JL |
562 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
563 | static inline int | |
0e602451 | 564 | xfrm_state_flush_secctx_check(struct net *net, u8 proto, struct xfrm_audit *audit_info) |
1da177e4 | 565 | { |
4aa2e62c JL |
566 | int i, err = 0; |
567 | ||
0e602451 | 568 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
4aa2e62c JL |
569 | struct xfrm_state *x; |
570 | ||
b67bfe0d | 571 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
4aa2e62c JL |
572 | if (xfrm_id_proto_match(x->id.proto, proto) && |
573 | (err = security_xfrm_state_delete(x)) != 0) { | |
ab5f5e8b JL |
574 | xfrm_audit_state_delete(x, 0, |
575 | audit_info->loginuid, | |
2532386f | 576 | audit_info->sessionid, |
ab5f5e8b | 577 | audit_info->secid); |
4aa2e62c JL |
578 | return err; |
579 | } | |
580 | } | |
581 | } | |
582 | ||
583 | return err; | |
584 | } | |
585 | #else | |
586 | static inline int | |
0e602451 | 587 | xfrm_state_flush_secctx_check(struct net *net, u8 proto, struct xfrm_audit *audit_info) |
4aa2e62c JL |
588 | { |
589 | return 0; | |
590 | } | |
591 | #endif | |
592 | ||
0e602451 | 593 | int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info) |
4aa2e62c | 594 | { |
9e64cc95 | 595 | int i, err = 0, cnt = 0; |
1da177e4 | 596 | |
283bc9f3 | 597 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
0e602451 | 598 | err = xfrm_state_flush_secctx_check(net, proto, audit_info); |
4aa2e62c JL |
599 | if (err) |
600 | goto out; | |
601 | ||
9e64cc95 | 602 | err = -ESRCH; |
0e602451 | 603 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
8f126e37 | 604 | struct xfrm_state *x; |
1da177e4 | 605 | restart: |
b67bfe0d | 606 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
1da177e4 | 607 | if (!xfrm_state_kern(x) && |
5794708f | 608 | xfrm_id_proto_match(x->id.proto, proto)) { |
1da177e4 | 609 | xfrm_state_hold(x); |
283bc9f3 | 610 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 611 | |
161a09e7 | 612 | err = xfrm_state_delete(x); |
ab5f5e8b JL |
613 | xfrm_audit_state_delete(x, err ? 0 : 1, |
614 | audit_info->loginuid, | |
2532386f | 615 | audit_info->sessionid, |
ab5f5e8b | 616 | audit_info->secid); |
1da177e4 | 617 | xfrm_state_put(x); |
9e64cc95 JHS |
618 | if (!err) |
619 | cnt++; | |
1da177e4 | 620 | |
283bc9f3 | 621 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
622 | goto restart; |
623 | } | |
624 | } | |
625 | } | |
9e64cc95 JHS |
626 | if (cnt) |
627 | err = 0; | |
4aa2e62c JL |
628 | |
629 | out: | |
283bc9f3 | 630 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
4aa2e62c | 631 | return err; |
1da177e4 LT |
632 | } |
633 | EXPORT_SYMBOL(xfrm_state_flush); | |
634 | ||
e071041b | 635 | void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si) |
28d8909b | 636 | { |
283bc9f3 | 637 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
e071041b AD |
638 | si->sadcnt = net->xfrm.state_num; |
639 | si->sadhcnt = net->xfrm.state_hmask; | |
28d8909b | 640 | si->sadhmcnt = xfrm_state_hashmax; |
283bc9f3 | 641 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
28d8909b JHS |
642 | } |
643 | EXPORT_SYMBOL(xfrm_sad_getinfo); | |
644 | ||
1da177e4 | 645 | static int |
1a898592 | 646 | xfrm_init_tempstate(struct xfrm_state *x, const struct flowi *fl, |
04686013 | 647 | const struct xfrm_tmpl *tmpl, |
33765d06 | 648 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
8444cf71 | 649 | unsigned short family) |
1da177e4 LT |
650 | { |
651 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
652 | if (!afinfo) | |
653 | return -1; | |
8444cf71 TE |
654 | afinfo->init_tempsel(&x->sel, fl); |
655 | ||
656 | if (family != tmpl->encap_family) { | |
657 | xfrm_state_put_afinfo(afinfo); | |
658 | afinfo = xfrm_state_get_afinfo(tmpl->encap_family); | |
659 | if (!afinfo) | |
660 | return -1; | |
661 | } | |
662 | afinfo->init_temprop(x, tmpl, daddr, saddr); | |
1da177e4 LT |
663 | xfrm_state_put_afinfo(afinfo); |
664 | return 0; | |
665 | } | |
666 | ||
9aa60088 DM |
667 | static struct xfrm_state *__xfrm_state_lookup(struct net *net, u32 mark, |
668 | const xfrm_address_t *daddr, | |
669 | __be32 spi, u8 proto, | |
670 | unsigned short family) | |
edcd5821 | 671 | { |
221df1ed | 672 | unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family); |
edcd5821 DM |
673 | struct xfrm_state *x; |
674 | ||
b67bfe0d | 675 | hlist_for_each_entry(x, net->xfrm.state_byspi+h, byspi) { |
edcd5821 DM |
676 | if (x->props.family != family || |
677 | x->id.spi != spi || | |
1802571b | 678 | x->id.proto != proto || |
70e94e66 | 679 | !xfrm_addr_equal(&x->id.daddr, daddr, family)) |
edcd5821 DM |
680 | continue; |
681 | ||
3d6acfa7 JHS |
682 | if ((mark & x->mark.m) != x->mark.v) |
683 | continue; | |
edcd5821 DM |
684 | xfrm_state_hold(x); |
685 | return x; | |
686 | } | |
687 | ||
688 | return NULL; | |
689 | } | |
690 | ||
9aa60088 DM |
691 | static struct xfrm_state *__xfrm_state_lookup_byaddr(struct net *net, u32 mark, |
692 | const xfrm_address_t *daddr, | |
693 | const xfrm_address_t *saddr, | |
694 | u8 proto, unsigned short family) | |
edcd5821 | 695 | { |
221df1ed | 696 | unsigned int h = xfrm_src_hash(net, daddr, saddr, family); |
edcd5821 DM |
697 | struct xfrm_state *x; |
698 | ||
b67bfe0d | 699 | hlist_for_each_entry(x, net->xfrm.state_bysrc+h, bysrc) { |
edcd5821 | 700 | if (x->props.family != family || |
1802571b | 701 | x->id.proto != proto || |
70e94e66 YH |
702 | !xfrm_addr_equal(&x->id.daddr, daddr, family) || |
703 | !xfrm_addr_equal(&x->props.saddr, saddr, family)) | |
edcd5821 DM |
704 | continue; |
705 | ||
3d6acfa7 JHS |
706 | if ((mark & x->mark.m) != x->mark.v) |
707 | continue; | |
edcd5821 DM |
708 | xfrm_state_hold(x); |
709 | return x; | |
710 | } | |
711 | ||
712 | return NULL; | |
713 | } | |
714 | ||
715 | static inline struct xfrm_state * | |
716 | __xfrm_state_locate(struct xfrm_state *x, int use_spi, int family) | |
717 | { | |
221df1ed | 718 | struct net *net = xs_net(x); |
bd55775c | 719 | u32 mark = x->mark.v & x->mark.m; |
221df1ed | 720 | |
edcd5821 | 721 | if (use_spi) |
bd55775c JHS |
722 | return __xfrm_state_lookup(net, mark, &x->id.daddr, |
723 | x->id.spi, x->id.proto, family); | |
edcd5821 | 724 | else |
bd55775c JHS |
725 | return __xfrm_state_lookup_byaddr(net, mark, |
726 | &x->id.daddr, | |
edcd5821 DM |
727 | &x->props.saddr, |
728 | x->id.proto, family); | |
729 | } | |
730 | ||
98806f75 | 731 | static void xfrm_hash_grow_check(struct net *net, int have_hash_collision) |
2fab22f2 PM |
732 | { |
733 | if (have_hash_collision && | |
98806f75 AD |
734 | (net->xfrm.state_hmask + 1) < xfrm_state_hashmax && |
735 | net->xfrm.state_num > net->xfrm.state_hmask) | |
736 | schedule_work(&net->xfrm.state_hash_work); | |
2fab22f2 PM |
737 | } |
738 | ||
08ec9af1 | 739 | static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x, |
4a08ab0f | 740 | const struct flowi *fl, unsigned short family, |
08ec9af1 DM |
741 | struct xfrm_state **best, int *acq_in_progress, |
742 | int *error) | |
743 | { | |
744 | /* Resolution logic: | |
745 | * 1. There is a valid state with matching selector. Done. | |
746 | * 2. Valid state with inappropriate selector. Skip. | |
747 | * | |
748 | * Entering area of "sysdeps". | |
749 | * | |
750 | * 3. If state is not valid, selector is temporary, it selects | |
751 | * only session which triggered previous resolution. Key | |
752 | * manager will do something to install a state with proper | |
753 | * selector. | |
754 | */ | |
755 | if (x->km.state == XFRM_STATE_VALID) { | |
756 | if ((x->sel.family && | |
757 | !xfrm_selector_match(&x->sel, fl, x->sel.family)) || | |
758 | !security_xfrm_state_pol_flow_match(x, pol, fl)) | |
759 | return; | |
760 | ||
761 | if (!*best || | |
762 | (*best)->km.dying > x->km.dying || | |
763 | ((*best)->km.dying == x->km.dying && | |
764 | (*best)->curlft.add_time < x->curlft.add_time)) | |
765 | *best = x; | |
766 | } else if (x->km.state == XFRM_STATE_ACQ) { | |
767 | *acq_in_progress = 1; | |
768 | } else if (x->km.state == XFRM_STATE_ERROR || | |
769 | x->km.state == XFRM_STATE_EXPIRED) { | |
770 | if (xfrm_selector_match(&x->sel, fl, x->sel.family) && | |
771 | security_xfrm_state_pol_flow_match(x, pol, fl)) | |
772 | *error = -ESRCH; | |
773 | } | |
774 | } | |
775 | ||
1da177e4 | 776 | struct xfrm_state * |
33765d06 | 777 | xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
b520e9f6 | 778 | const struct flowi *fl, struct xfrm_tmpl *tmpl, |
1da177e4 LT |
779 | struct xfrm_policy *pol, int *err, |
780 | unsigned short family) | |
781 | { | |
08ec9af1 | 782 | static xfrm_address_t saddr_wildcard = { }; |
5447c5e4 | 783 | struct net *net = xp_net(pol); |
6a783c90 | 784 | unsigned int h, h_wildcard; |
37b08e34 | 785 | struct xfrm_state *x, *x0, *to_put; |
1da177e4 LT |
786 | int acquire_in_progress = 0; |
787 | int error = 0; | |
788 | struct xfrm_state *best = NULL; | |
bd55775c | 789 | u32 mark = pol->mark.v & pol->mark.m; |
8444cf71 | 790 | unsigned short encap_family = tmpl->encap_family; |
a716c119 | 791 | |
37b08e34 DM |
792 | to_put = NULL; |
793 | ||
283bc9f3 | 794 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
8444cf71 | 795 | h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family); |
b67bfe0d | 796 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
8444cf71 | 797 | if (x->props.family == encap_family && |
1da177e4 | 798 | x->props.reqid == tmpl->reqid && |
3d6acfa7 | 799 | (mark & x->mark.m) == x->mark.v && |
fbd9a5b4 | 800 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
8444cf71 | 801 | xfrm_state_addr_check(x, daddr, saddr, encap_family) && |
1da177e4 LT |
802 | tmpl->mode == x->props.mode && |
803 | tmpl->id.proto == x->id.proto && | |
08ec9af1 | 804 | (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) |
1f673c5f | 805 | xfrm_state_look_at(pol, x, fl, encap_family, |
08ec9af1 DM |
806 | &best, &acquire_in_progress, &error); |
807 | } | |
6f115638 | 808 | if (best || acquire_in_progress) |
08ec9af1 DM |
809 | goto found; |
810 | ||
8444cf71 | 811 | h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, encap_family); |
b67bfe0d | 812 | hlist_for_each_entry(x, net->xfrm.state_bydst+h_wildcard, bydst) { |
8444cf71 | 813 | if (x->props.family == encap_family && |
08ec9af1 | 814 | x->props.reqid == tmpl->reqid && |
3d6acfa7 | 815 | (mark & x->mark.m) == x->mark.v && |
08ec9af1 | 816 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
f59bbdfa | 817 | xfrm_addr_equal(&x->id.daddr, daddr, encap_family) && |
08ec9af1 DM |
818 | tmpl->mode == x->props.mode && |
819 | tmpl->id.proto == x->id.proto && | |
820 | (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) | |
1f673c5f | 821 | xfrm_state_look_at(pol, x, fl, encap_family, |
08ec9af1 | 822 | &best, &acquire_in_progress, &error); |
1da177e4 LT |
823 | } |
824 | ||
08ec9af1 | 825 | found: |
1da177e4 LT |
826 | x = best; |
827 | if (!x && !error && !acquire_in_progress) { | |
5c5d281a | 828 | if (tmpl->id.spi && |
bd55775c | 829 | (x0 = __xfrm_state_lookup(net, mark, daddr, tmpl->id.spi, |
8444cf71 | 830 | tmpl->id.proto, encap_family)) != NULL) { |
37b08e34 | 831 | to_put = x0; |
1da177e4 LT |
832 | error = -EEXIST; |
833 | goto out; | |
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 | ||
931 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); | |
932 | xfrm_state_hold(x); | |
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: | |
4e3fd7a0 AD |
1047 | *(struct in6_addr *)x->sel.daddr.a6 = *(struct in6_addr *)daddr; |
1048 | *(struct in6_addr *)x->sel.saddr.a6 = *(struct in6_addr *)saddr; | |
2770834c DM |
1049 | x->sel.prefixlen_d = 128; |
1050 | x->sel.prefixlen_s = 128; | |
4e3fd7a0 AD |
1051 | *(struct in6_addr *)x->props.saddr.a6 = *(struct in6_addr *)saddr; |
1052 | *(struct in6_addr *)x->id.daddr.a6 = *(struct in6_addr *)daddr; | |
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 |
6666351d | 1138 | static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, int *errp) |
80c9abaa | 1139 | { |
98806f75 | 1140 | struct net *net = xs_net(orig); |
80c9abaa | 1141 | int err = -ENOMEM; |
98806f75 | 1142 | struct xfrm_state *x = xfrm_state_alloc(net); |
80c9abaa | 1143 | if (!x) |
553f9118 | 1144 | goto out; |
80c9abaa SS |
1145 | |
1146 | memcpy(&x->id, &orig->id, sizeof(x->id)); | |
1147 | memcpy(&x->sel, &orig->sel, sizeof(x->sel)); | |
1148 | memcpy(&x->lft, &orig->lft, sizeof(x->lft)); | |
1149 | x->props.mode = orig->props.mode; | |
1150 | x->props.replay_window = orig->props.replay_window; | |
1151 | x->props.reqid = orig->props.reqid; | |
1152 | x->props.family = orig->props.family; | |
1153 | x->props.saddr = orig->props.saddr; | |
1154 | ||
1155 | if (orig->aalg) { | |
4447bb33 | 1156 | x->aalg = xfrm_algo_auth_clone(orig->aalg); |
80c9abaa SS |
1157 | if (!x->aalg) |
1158 | goto error; | |
1159 | } | |
1160 | x->props.aalgo = orig->props.aalgo; | |
1161 | ||
ee5c2317 SK |
1162 | if (orig->aead) { |
1163 | x->aead = xfrm_algo_aead_clone(orig->aead); | |
1164 | if (!x->aead) | |
1165 | goto error; | |
1166 | } | |
80c9abaa SS |
1167 | if (orig->ealg) { |
1168 | x->ealg = xfrm_algo_clone(orig->ealg); | |
1169 | if (!x->ealg) | |
1170 | goto error; | |
1171 | } | |
1172 | x->props.ealgo = orig->props.ealgo; | |
1173 | ||
1174 | if (orig->calg) { | |
1175 | x->calg = xfrm_algo_clone(orig->calg); | |
1176 | if (!x->calg) | |
1177 | goto error; | |
1178 | } | |
1179 | x->props.calgo = orig->props.calgo; | |
1180 | ||
a716c119 | 1181 | if (orig->encap) { |
80c9abaa SS |
1182 | x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL); |
1183 | if (!x->encap) | |
1184 | goto error; | |
1185 | } | |
1186 | ||
1187 | if (orig->coaddr) { | |
1188 | x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr), | |
1189 | GFP_KERNEL); | |
1190 | if (!x->coaddr) | |
1191 | goto error; | |
1192 | } | |
1193 | ||
af2f464e SK |
1194 | if (orig->replay_esn) { |
1195 | err = xfrm_replay_clone(x, orig); | |
1196 | if (err) | |
1197 | goto error; | |
1198 | } | |
1199 | ||
bd55775c JHS |
1200 | memcpy(&x->mark, &orig->mark, sizeof(x->mark)); |
1201 | ||
80c9abaa SS |
1202 | err = xfrm_init_state(x); |
1203 | if (err) | |
1204 | goto error; | |
1205 | ||
1206 | x->props.flags = orig->props.flags; | |
a947b0a9 | 1207 | x->props.extra_flags = orig->props.extra_flags; |
80c9abaa | 1208 | |
ee5c2317 SK |
1209 | x->tfcpad = orig->tfcpad; |
1210 | x->replay_maxdiff = orig->replay_maxdiff; | |
1211 | x->replay_maxage = orig->replay_maxage; | |
80c9abaa SS |
1212 | x->curlft.add_time = orig->curlft.add_time; |
1213 | x->km.state = orig->km.state; | |
1214 | x->km.seq = orig->km.seq; | |
1215 | ||
1216 | return x; | |
1217 | ||
1218 | error: | |
553f9118 HX |
1219 | xfrm_state_put(x); |
1220 | out: | |
80c9abaa SS |
1221 | if (errp) |
1222 | *errp = err; | |
80c9abaa SS |
1223 | return NULL; |
1224 | } | |
80c9abaa | 1225 | |
283bc9f3 | 1226 | struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net) |
80c9abaa SS |
1227 | { |
1228 | unsigned int h; | |
8c0cba22 SK |
1229 | struct xfrm_state *x = NULL; |
1230 | ||
1231 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
80c9abaa SS |
1232 | |
1233 | if (m->reqid) { | |
283bc9f3 | 1234 | h = xfrm_dst_hash(net, &m->old_daddr, &m->old_saddr, |
80c9abaa | 1235 | m->reqid, m->old_family); |
283bc9f3 | 1236 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
80c9abaa SS |
1237 | if (x->props.mode != m->mode || |
1238 | x->id.proto != m->proto) | |
1239 | continue; | |
1240 | if (m->reqid && x->props.reqid != m->reqid) | |
1241 | continue; | |
70e94e66 YH |
1242 | if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr, |
1243 | m->old_family) || | |
1244 | !xfrm_addr_equal(&x->props.saddr, &m->old_saddr, | |
1245 | m->old_family)) | |
80c9abaa SS |
1246 | continue; |
1247 | xfrm_state_hold(x); | |
8c0cba22 | 1248 | break; |
80c9abaa SS |
1249 | } |
1250 | } else { | |
283bc9f3 | 1251 | h = xfrm_src_hash(net, &m->old_daddr, &m->old_saddr, |
80c9abaa | 1252 | m->old_family); |
283bc9f3 | 1253 | hlist_for_each_entry(x, net->xfrm.state_bysrc+h, bysrc) { |
80c9abaa SS |
1254 | if (x->props.mode != m->mode || |
1255 | x->id.proto != m->proto) | |
1256 | continue; | |
70e94e66 YH |
1257 | if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr, |
1258 | m->old_family) || | |
1259 | !xfrm_addr_equal(&x->props.saddr, &m->old_saddr, | |
1260 | m->old_family)) | |
80c9abaa SS |
1261 | continue; |
1262 | xfrm_state_hold(x); | |
8c0cba22 | 1263 | break; |
80c9abaa SS |
1264 | } |
1265 | } | |
1266 | ||
8c0cba22 SK |
1267 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1268 | ||
1269 | return x; | |
80c9abaa SS |
1270 | } |
1271 | EXPORT_SYMBOL(xfrm_migrate_state_find); | |
1272 | ||
3e94c2dc WC |
1273 | struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, |
1274 | struct xfrm_migrate *m) | |
80c9abaa SS |
1275 | { |
1276 | struct xfrm_state *xc; | |
1277 | int err; | |
1278 | ||
1279 | xc = xfrm_state_clone(x, &err); | |
1280 | if (!xc) | |
1281 | return NULL; | |
1282 | ||
1283 | memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr)); | |
1284 | memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr)); | |
1285 | ||
1286 | /* add state */ | |
70e94e66 | 1287 | if (xfrm_addr_equal(&x->id.daddr, &m->new_daddr, m->new_family)) { |
80c9abaa SS |
1288 | /* a care is needed when the destination address of the |
1289 | state is to be updated as it is a part of triplet */ | |
1290 | xfrm_state_insert(xc); | |
1291 | } else { | |
1292 | if ((err = xfrm_state_add(xc)) < 0) | |
1293 | goto error; | |
1294 | } | |
1295 | ||
1296 | return xc; | |
1297 | error: | |
78347c8c | 1298 | xfrm_state_put(xc); |
80c9abaa SS |
1299 | return NULL; |
1300 | } | |
1301 | EXPORT_SYMBOL(xfrm_state_migrate); | |
1302 | #endif | |
1303 | ||
1da177e4 LT |
1304 | int xfrm_state_update(struct xfrm_state *x) |
1305 | { | |
37b08e34 | 1306 | struct xfrm_state *x1, *to_put; |
1da177e4 | 1307 | int err; |
eb2971b6 | 1308 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
283bc9f3 | 1309 | struct net *net = xs_net(x); |
1da177e4 | 1310 | |
37b08e34 DM |
1311 | to_put = NULL; |
1312 | ||
283bc9f3 | 1313 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
edcd5821 | 1314 | x1 = __xfrm_state_locate(x, use_spi, x->props.family); |
1da177e4 LT |
1315 | |
1316 | err = -ESRCH; | |
1317 | if (!x1) | |
1318 | goto out; | |
1319 | ||
1320 | if (xfrm_state_kern(x1)) { | |
37b08e34 | 1321 | to_put = x1; |
1da177e4 LT |
1322 | err = -EEXIST; |
1323 | goto out; | |
1324 | } | |
1325 | ||
1326 | if (x1->km.state == XFRM_STATE_ACQ) { | |
1327 | __xfrm_state_insert(x); | |
1328 | x = NULL; | |
1329 | } | |
1330 | err = 0; | |
1331 | ||
1332 | out: | |
283bc9f3 | 1333 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 1334 | |
37b08e34 DM |
1335 | if (to_put) |
1336 | xfrm_state_put(to_put); | |
1337 | ||
1da177e4 LT |
1338 | if (err) |
1339 | return err; | |
1340 | ||
1341 | if (!x) { | |
1342 | xfrm_state_delete(x1); | |
1343 | xfrm_state_put(x1); | |
1344 | return 0; | |
1345 | } | |
1346 | ||
1347 | err = -EINVAL; | |
1348 | spin_lock_bh(&x1->lock); | |
1349 | if (likely(x1->km.state == XFRM_STATE_VALID)) { | |
1350 | if (x->encap && x1->encap) | |
1351 | memcpy(x1->encap, x->encap, sizeof(*x1->encap)); | |
060f02a3 NT |
1352 | if (x->coaddr && x1->coaddr) { |
1353 | memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr)); | |
1354 | } | |
1355 | if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel))) | |
1356 | memcpy(&x1->sel, &x->sel, sizeof(x1->sel)); | |
1da177e4 LT |
1357 | memcpy(&x1->lft, &x->lft, sizeof(x1->lft)); |
1358 | x1->km.dying = 0; | |
1359 | ||
9e0d57fd | 1360 | tasklet_hrtimer_start(&x1->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL); |
1da177e4 LT |
1361 | if (x1->curlft.use_time) |
1362 | xfrm_state_check_expire(x1); | |
1363 | ||
1364 | err = 0; | |
8fcbc637 TG |
1365 | x->km.state = XFRM_STATE_DEAD; |
1366 | __xfrm_state_put(x); | |
1da177e4 LT |
1367 | } |
1368 | spin_unlock_bh(&x1->lock); | |
1369 | ||
1370 | xfrm_state_put(x1); | |
1371 | ||
1372 | return err; | |
1373 | } | |
1374 | EXPORT_SYMBOL(xfrm_state_update); | |
1375 | ||
1376 | int xfrm_state_check_expire(struct xfrm_state *x) | |
1377 | { | |
1378 | if (!x->curlft.use_time) | |
9d729f72 | 1379 | x->curlft.use_time = get_seconds(); |
1da177e4 | 1380 | |
1da177e4 LT |
1381 | if (x->curlft.bytes >= x->lft.hard_byte_limit || |
1382 | x->curlft.packets >= x->lft.hard_packet_limit) { | |
4666faab | 1383 | x->km.state = XFRM_STATE_EXPIRED; |
9b7a787d | 1384 | tasklet_hrtimer_start(&x->mtimer, ktime_set(0, 0), HRTIMER_MODE_REL); |
1da177e4 LT |
1385 | return -EINVAL; |
1386 | } | |
1387 | ||
1388 | if (!x->km.dying && | |
1389 | (x->curlft.bytes >= x->lft.soft_byte_limit || | |
4666faab HX |
1390 | x->curlft.packets >= x->lft.soft_packet_limit)) { |
1391 | x->km.dying = 1; | |
53bc6b4d | 1392 | km_state_expired(x, 0, 0); |
4666faab | 1393 | } |
1da177e4 LT |
1394 | return 0; |
1395 | } | |
1396 | EXPORT_SYMBOL(xfrm_state_check_expire); | |
1397 | ||
1da177e4 | 1398 | struct xfrm_state * |
a70486f0 | 1399 | xfrm_state_lookup(struct net *net, u32 mark, const xfrm_address_t *daddr, __be32 spi, |
bd55775c | 1400 | u8 proto, unsigned short family) |
1da177e4 LT |
1401 | { |
1402 | struct xfrm_state *x; | |
1da177e4 | 1403 | |
283bc9f3 | 1404 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1405 | x = __xfrm_state_lookup(net, mark, daddr, spi, proto, family); |
283bc9f3 | 1406 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1407 | return x; |
1408 | } | |
1409 | EXPORT_SYMBOL(xfrm_state_lookup); | |
1410 | ||
1411 | struct xfrm_state * | |
bd55775c | 1412 | xfrm_state_lookup_byaddr(struct net *net, u32 mark, |
a70486f0 | 1413 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
eb2971b6 MN |
1414 | u8 proto, unsigned short family) |
1415 | { | |
1416 | struct xfrm_state *x; | |
eb2971b6 | 1417 | |
283bc9f3 | 1418 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1419 | x = __xfrm_state_lookup_byaddr(net, mark, daddr, saddr, proto, family); |
283bc9f3 | 1420 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
eb2971b6 MN |
1421 | return x; |
1422 | } | |
1423 | EXPORT_SYMBOL(xfrm_state_lookup_byaddr); | |
1424 | ||
1425 | struct xfrm_state * | |
e473fcb4 MK |
1426 | xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, u8 mode, u32 reqid, |
1427 | u8 proto, const xfrm_address_t *daddr, | |
1428 | const xfrm_address_t *saddr, int create, unsigned short family) | |
1da177e4 LT |
1429 | { |
1430 | struct xfrm_state *x; | |
1da177e4 | 1431 | |
283bc9f3 | 1432 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1433 | x = __find_acq_core(net, mark, family, mode, reqid, proto, daddr, saddr, create); |
283bc9f3 | 1434 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
2770834c | 1435 | |
1da177e4 LT |
1436 | return x; |
1437 | } | |
1438 | EXPORT_SYMBOL(xfrm_find_acq); | |
1439 | ||
41a49cc3 MN |
1440 | #ifdef CONFIG_XFRM_SUB_POLICY |
1441 | int | |
1442 | xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, | |
283bc9f3 | 1443 | unsigned short family, struct net *net) |
41a49cc3 MN |
1444 | { |
1445 | int err = 0; | |
1446 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
1447 | if (!afinfo) | |
1448 | return -EAFNOSUPPORT; | |
1449 | ||
283bc9f3 | 1450 | spin_lock_bh(&net->xfrm.xfrm_state_lock); /*FIXME*/ |
41a49cc3 MN |
1451 | if (afinfo->tmpl_sort) |
1452 | err = afinfo->tmpl_sort(dst, src, n); | |
283bc9f3 | 1453 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
41a49cc3 MN |
1454 | xfrm_state_put_afinfo(afinfo); |
1455 | return err; | |
1456 | } | |
1457 | EXPORT_SYMBOL(xfrm_tmpl_sort); | |
1458 | ||
1459 | int | |
1460 | xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, | |
1461 | unsigned short family) | |
1462 | { | |
1463 | int err = 0; | |
1464 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
35ea790d | 1465 | struct net *net = xs_net(*src); |
283bc9f3 | 1466 | |
41a49cc3 MN |
1467 | if (!afinfo) |
1468 | return -EAFNOSUPPORT; | |
1469 | ||
283bc9f3 | 1470 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
41a49cc3 MN |
1471 | if (afinfo->state_sort) |
1472 | err = afinfo->state_sort(dst, src, n); | |
283bc9f3 | 1473 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
41a49cc3 MN |
1474 | xfrm_state_put_afinfo(afinfo); |
1475 | return err; | |
1476 | } | |
1477 | EXPORT_SYMBOL(xfrm_state_sort); | |
1478 | #endif | |
1479 | ||
1da177e4 LT |
1480 | /* Silly enough, but I'm lazy to build resolution list */ |
1481 | ||
bd55775c | 1482 | static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq) |
1da177e4 LT |
1483 | { |
1484 | int i; | |
1da177e4 | 1485 | |
5447c5e4 | 1486 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
8f126e37 DM |
1487 | struct xfrm_state *x; |
1488 | ||
b67bfe0d | 1489 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
8f126e37 | 1490 | if (x->km.seq == seq && |
3d6acfa7 | 1491 | (mark & x->mark.m) == x->mark.v && |
8f126e37 | 1492 | x->km.state == XFRM_STATE_ACQ) { |
1da177e4 LT |
1493 | xfrm_state_hold(x); |
1494 | return x; | |
1495 | } | |
1496 | } | |
1497 | } | |
1498 | return NULL; | |
1499 | } | |
1500 | ||
bd55775c | 1501 | struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq) |
1da177e4 LT |
1502 | { |
1503 | struct xfrm_state *x; | |
1504 | ||
283bc9f3 | 1505 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1506 | x = __xfrm_find_acq_byseq(net, mark, seq); |
283bc9f3 | 1507 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1508 | return x; |
1509 | } | |
1510 | EXPORT_SYMBOL(xfrm_find_acq_byseq); | |
1511 | ||
1512 | u32 xfrm_get_acqseq(void) | |
1513 | { | |
1514 | u32 res; | |
6836b9bd | 1515 | static atomic_t acqseq; |
1516 | ||
1517 | do { | |
1518 | res = atomic_inc_return(&acqseq); | |
1519 | } while (!res); | |
1da177e4 | 1520 | |
1da177e4 LT |
1521 | return res; |
1522 | } | |
1523 | EXPORT_SYMBOL(xfrm_get_acqseq); | |
1524 | ||
776e9dd9 FD |
1525 | int verify_spi_info(u8 proto, u32 min, u32 max) |
1526 | { | |
1527 | switch (proto) { | |
1528 | case IPPROTO_AH: | |
1529 | case IPPROTO_ESP: | |
1530 | break; | |
1531 | ||
1532 | case IPPROTO_COMP: | |
1533 | /* IPCOMP spi is 16-bits. */ | |
1534 | if (max >= 0x10000) | |
1535 | return -EINVAL; | |
1536 | break; | |
1537 | ||
1538 | default: | |
1539 | return -EINVAL; | |
1540 | } | |
1541 | ||
1542 | if (min > max) | |
1543 | return -EINVAL; | |
1544 | ||
1545 | return 0; | |
1546 | } | |
1547 | EXPORT_SYMBOL(verify_spi_info); | |
1548 | ||
658b219e | 1549 | int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high) |
1da177e4 | 1550 | { |
221df1ed | 1551 | struct net *net = xs_net(x); |
f034b5d4 | 1552 | unsigned int h; |
1da177e4 | 1553 | struct xfrm_state *x0; |
658b219e HX |
1554 | int err = -ENOENT; |
1555 | __be32 minspi = htonl(low); | |
1556 | __be32 maxspi = htonl(high); | |
bd55775c | 1557 | u32 mark = x->mark.v & x->mark.m; |
1da177e4 | 1558 | |
658b219e HX |
1559 | spin_lock_bh(&x->lock); |
1560 | if (x->km.state == XFRM_STATE_DEAD) | |
1561 | goto unlock; | |
1562 | ||
1563 | err = 0; | |
1da177e4 | 1564 | if (x->id.spi) |
658b219e HX |
1565 | goto unlock; |
1566 | ||
1567 | err = -ENOENT; | |
1da177e4 LT |
1568 | |
1569 | if (minspi == maxspi) { | |
bd55775c | 1570 | x0 = xfrm_state_lookup(net, mark, &x->id.daddr, minspi, x->id.proto, x->props.family); |
1da177e4 LT |
1571 | if (x0) { |
1572 | xfrm_state_put(x0); | |
658b219e | 1573 | goto unlock; |
1da177e4 LT |
1574 | } |
1575 | x->id.spi = minspi; | |
1576 | } else { | |
1577 | u32 spi = 0; | |
9b7a787d | 1578 | for (h = 0; h < high-low+1; h++) { |
63862b5b | 1579 | spi = low + prandom_u32()%(high-low+1); |
bd55775c | 1580 | x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family); |
1da177e4 LT |
1581 | if (x0 == NULL) { |
1582 | x->id.spi = htonl(spi); | |
1583 | break; | |
1584 | } | |
1585 | xfrm_state_put(x0); | |
1586 | } | |
1587 | } | |
1588 | if (x->id.spi) { | |
283bc9f3 | 1589 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12604d8a AD |
1590 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family); |
1591 | hlist_add_head(&x->byspi, net->xfrm.state_byspi+h); | |
283bc9f3 | 1592 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
658b219e HX |
1593 | |
1594 | err = 0; | |
1da177e4 | 1595 | } |
658b219e HX |
1596 | |
1597 | unlock: | |
1598 | spin_unlock_bh(&x->lock); | |
1599 | ||
1600 | return err; | |
1da177e4 LT |
1601 | } |
1602 | EXPORT_SYMBOL(xfrm_alloc_spi); | |
1603 | ||
284fa7da | 1604 | int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, |
4c563f76 | 1605 | int (*func)(struct xfrm_state *, int, void*), |
1da177e4 LT |
1606 | void *data) |
1607 | { | |
12a169e7 HX |
1608 | struct xfrm_state *state; |
1609 | struct xfrm_state_walk *x; | |
1da177e4 LT |
1610 | int err = 0; |
1611 | ||
12a169e7 | 1612 | if (walk->seq != 0 && list_empty(&walk->all)) |
4c563f76 TT |
1613 | return 0; |
1614 | ||
283bc9f3 | 1615 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12a169e7 | 1616 | if (list_empty(&walk->all)) |
284fa7da | 1617 | x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all); |
12a169e7 HX |
1618 | else |
1619 | x = list_entry(&walk->all, struct xfrm_state_walk, all); | |
284fa7da | 1620 | list_for_each_entry_from(x, &net->xfrm.state_all, all) { |
12a169e7 | 1621 | if (x->state == XFRM_STATE_DEAD) |
4c563f76 | 1622 | continue; |
12a169e7 HX |
1623 | state = container_of(x, struct xfrm_state, km); |
1624 | if (!xfrm_id_proto_match(state->id.proto, walk->proto)) | |
4c563f76 | 1625 | continue; |
12a169e7 HX |
1626 | err = func(state, walk->seq, data); |
1627 | if (err) { | |
1628 | list_move_tail(&walk->all, &x->all); | |
1629 | goto out; | |
1da177e4 | 1630 | } |
12a169e7 | 1631 | walk->seq++; |
1da177e4 | 1632 | } |
12a169e7 | 1633 | if (walk->seq == 0) { |
1da177e4 LT |
1634 | err = -ENOENT; |
1635 | goto out; | |
1636 | } | |
12a169e7 | 1637 | list_del_init(&walk->all); |
1da177e4 | 1638 | out: |
283bc9f3 | 1639 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1640 | return err; |
1641 | } | |
1642 | EXPORT_SYMBOL(xfrm_state_walk); | |
1643 | ||
5c182458 HX |
1644 | void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto) |
1645 | { | |
12a169e7 | 1646 | INIT_LIST_HEAD(&walk->all); |
5c182458 | 1647 | walk->proto = proto; |
12a169e7 HX |
1648 | walk->state = XFRM_STATE_DEAD; |
1649 | walk->seq = 0; | |
5c182458 HX |
1650 | } |
1651 | EXPORT_SYMBOL(xfrm_state_walk_init); | |
1652 | ||
283bc9f3 | 1653 | void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net) |
abb81c4f | 1654 | { |
12a169e7 | 1655 | if (list_empty(&walk->all)) |
5c182458 | 1656 | return; |
5c182458 | 1657 | |
283bc9f3 | 1658 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12a169e7 | 1659 | list_del(&walk->all); |
283bc9f3 | 1660 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
abb81c4f HX |
1661 | } |
1662 | EXPORT_SYMBOL(xfrm_state_walk_done); | |
1663 | ||
f8cd5488 JHS |
1664 | static void xfrm_replay_timer_handler(unsigned long data) |
1665 | { | |
3e94c2dc | 1666 | struct xfrm_state *x = (struct xfrm_state *)data; |
f8cd5488 JHS |
1667 | |
1668 | spin_lock(&x->lock); | |
1669 | ||
2717096a | 1670 | if (x->km.state == XFRM_STATE_VALID) { |
a6483b79 | 1671 | if (xfrm_aevent_is_on(xs_net(x))) |
9fdc4883 | 1672 | x->repl->notify(x, XFRM_REPLAY_TIMEOUT); |
2717096a JHS |
1673 | else |
1674 | x->xflags |= XFRM_TIME_DEFER; | |
1675 | } | |
f8cd5488 JHS |
1676 | |
1677 | spin_unlock(&x->lock); | |
1678 | } | |
1679 | ||
df01812e | 1680 | static LIST_HEAD(xfrm_km_list); |
1da177e4 | 1681 | |
214e005b | 1682 | void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
1da177e4 LT |
1683 | { |
1684 | struct xfrm_mgr *km; | |
1685 | ||
85168c00 CW |
1686 | rcu_read_lock(); |
1687 | list_for_each_entry_rcu(km, &xfrm_km_list, list) | |
26b15dad JHS |
1688 | if (km->notify_policy) |
1689 | km->notify_policy(xp, dir, c); | |
85168c00 | 1690 | rcu_read_unlock(); |
26b15dad | 1691 | } |
1da177e4 | 1692 | |
214e005b | 1693 | void km_state_notify(struct xfrm_state *x, const struct km_event *c) |
26b15dad JHS |
1694 | { |
1695 | struct xfrm_mgr *km; | |
85168c00 CW |
1696 | rcu_read_lock(); |
1697 | list_for_each_entry_rcu(km, &xfrm_km_list, list) | |
26b15dad JHS |
1698 | if (km->notify) |
1699 | km->notify(x, c); | |
85168c00 | 1700 | rcu_read_unlock(); |
26b15dad JHS |
1701 | } |
1702 | ||
1703 | EXPORT_SYMBOL(km_policy_notify); | |
1704 | EXPORT_SYMBOL(km_state_notify); | |
1705 | ||
15e47304 | 1706 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid) |
26b15dad JHS |
1707 | { |
1708 | struct km_event c; | |
1709 | ||
bf08867f | 1710 | c.data.hard = hard; |
15e47304 | 1711 | c.portid = portid; |
f60f6b8f | 1712 | c.event = XFRM_MSG_EXPIRE; |
26b15dad | 1713 | km_state_notify(x, &c); |
1da177e4 LT |
1714 | } |
1715 | ||
53bc6b4d | 1716 | EXPORT_SYMBOL(km_state_expired); |
26b15dad JHS |
1717 | /* |
1718 | * We send to all registered managers regardless of failure | |
1719 | * We are happy with one success | |
1720 | */ | |
980ebd25 | 1721 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol) |
1da177e4 | 1722 | { |
26b15dad | 1723 | int err = -EINVAL, acqret; |
1da177e4 LT |
1724 | struct xfrm_mgr *km; |
1725 | ||
85168c00 CW |
1726 | rcu_read_lock(); |
1727 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
65e0736b | 1728 | acqret = km->acquire(x, t, pol); |
26b15dad JHS |
1729 | if (!acqret) |
1730 | err = acqret; | |
1da177e4 | 1731 | } |
85168c00 | 1732 | rcu_read_unlock(); |
1da177e4 LT |
1733 | return err; |
1734 | } | |
980ebd25 | 1735 | EXPORT_SYMBOL(km_query); |
1da177e4 | 1736 | |
5d36b180 | 1737 | int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) |
1da177e4 LT |
1738 | { |
1739 | int err = -EINVAL; | |
1740 | struct xfrm_mgr *km; | |
1741 | ||
85168c00 CW |
1742 | rcu_read_lock(); |
1743 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
1da177e4 LT |
1744 | if (km->new_mapping) |
1745 | err = km->new_mapping(x, ipaddr, sport); | |
1746 | if (!err) | |
1747 | break; | |
1748 | } | |
85168c00 | 1749 | rcu_read_unlock(); |
1da177e4 LT |
1750 | return err; |
1751 | } | |
1752 | EXPORT_SYMBOL(km_new_mapping); | |
1753 | ||
15e47304 | 1754 | void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid) |
1da177e4 | 1755 | { |
26b15dad | 1756 | struct km_event c; |
1da177e4 | 1757 | |
bf08867f | 1758 | c.data.hard = hard; |
15e47304 | 1759 | c.portid = portid; |
f60f6b8f | 1760 | c.event = XFRM_MSG_POLEXPIRE; |
26b15dad | 1761 | km_policy_notify(pol, dir, &c); |
1da177e4 | 1762 | } |
a70fcb0b | 1763 | EXPORT_SYMBOL(km_policy_expired); |
1da177e4 | 1764 | |
2d60abc2 | 1765 | #ifdef CONFIG_XFRM_MIGRATE |
183cad12 DM |
1766 | int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1767 | const struct xfrm_migrate *m, int num_migrate, | |
1768 | const struct xfrm_kmaddress *k) | |
80c9abaa SS |
1769 | { |
1770 | int err = -EINVAL; | |
1771 | int ret; | |
1772 | struct xfrm_mgr *km; | |
1773 | ||
85168c00 CW |
1774 | rcu_read_lock(); |
1775 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
80c9abaa | 1776 | if (km->migrate) { |
13c1d189 | 1777 | ret = km->migrate(sel, dir, type, m, num_migrate, k); |
80c9abaa SS |
1778 | if (!ret) |
1779 | err = ret; | |
1780 | } | |
1781 | } | |
85168c00 | 1782 | rcu_read_unlock(); |
80c9abaa SS |
1783 | return err; |
1784 | } | |
1785 | EXPORT_SYMBOL(km_migrate); | |
2d60abc2 | 1786 | #endif |
80c9abaa | 1787 | |
db983c11 | 1788 | int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr) |
97a64b45 MN |
1789 | { |
1790 | int err = -EINVAL; | |
1791 | int ret; | |
1792 | struct xfrm_mgr *km; | |
1793 | ||
85168c00 CW |
1794 | rcu_read_lock(); |
1795 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
97a64b45 | 1796 | if (km->report) { |
db983c11 | 1797 | ret = km->report(net, proto, sel, addr); |
97a64b45 MN |
1798 | if (!ret) |
1799 | err = ret; | |
1800 | } | |
1801 | } | |
85168c00 | 1802 | rcu_read_unlock(); |
97a64b45 MN |
1803 | return err; |
1804 | } | |
1805 | EXPORT_SYMBOL(km_report); | |
1806 | ||
1da177e4 LT |
1807 | int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) |
1808 | { | |
1809 | int err; | |
1810 | u8 *data; | |
1811 | struct xfrm_mgr *km; | |
1812 | struct xfrm_policy *pol = NULL; | |
1813 | ||
1814 | if (optlen <= 0 || optlen > PAGE_SIZE) | |
1815 | return -EMSGSIZE; | |
1816 | ||
1817 | data = kmalloc(optlen, GFP_KERNEL); | |
1818 | if (!data) | |
1819 | return -ENOMEM; | |
1820 | ||
1821 | err = -EFAULT; | |
1822 | if (copy_from_user(data, optval, optlen)) | |
1823 | goto out; | |
1824 | ||
1825 | err = -EINVAL; | |
85168c00 CW |
1826 | rcu_read_lock(); |
1827 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
cb969f07 | 1828 | pol = km->compile_policy(sk, optname, data, |
1da177e4 LT |
1829 | optlen, &err); |
1830 | if (err >= 0) | |
1831 | break; | |
1832 | } | |
85168c00 | 1833 | rcu_read_unlock(); |
1da177e4 LT |
1834 | |
1835 | if (err >= 0) { | |
1836 | xfrm_sk_policy_insert(sk, err, pol); | |
1837 | xfrm_pol_put(pol); | |
1838 | err = 0; | |
1839 | } | |
1840 | ||
1841 | out: | |
1842 | kfree(data); | |
1843 | return err; | |
1844 | } | |
1845 | EXPORT_SYMBOL(xfrm_user_policy); | |
1846 | ||
85168c00 CW |
1847 | static DEFINE_SPINLOCK(xfrm_km_lock); |
1848 | ||
1da177e4 LT |
1849 | int xfrm_register_km(struct xfrm_mgr *km) |
1850 | { | |
85168c00 CW |
1851 | spin_lock_bh(&xfrm_km_lock); |
1852 | list_add_tail_rcu(&km->list, &xfrm_km_list); | |
1853 | spin_unlock_bh(&xfrm_km_lock); | |
1da177e4 LT |
1854 | return 0; |
1855 | } | |
1856 | EXPORT_SYMBOL(xfrm_register_km); | |
1857 | ||
1858 | int xfrm_unregister_km(struct xfrm_mgr *km) | |
1859 | { | |
85168c00 CW |
1860 | spin_lock_bh(&xfrm_km_lock); |
1861 | list_del_rcu(&km->list); | |
1862 | spin_unlock_bh(&xfrm_km_lock); | |
1863 | synchronize_rcu(); | |
1da177e4 LT |
1864 | return 0; |
1865 | } | |
1866 | EXPORT_SYMBOL(xfrm_unregister_km); | |
1867 | ||
1868 | int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo) | |
1869 | { | |
1870 | int err = 0; | |
1871 | if (unlikely(afinfo == NULL)) | |
1872 | return -EINVAL; | |
1873 | if (unlikely(afinfo->family >= NPROTO)) | |
1874 | return -EAFNOSUPPORT; | |
44abdc30 | 1875 | spin_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1876 | if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL)) |
1877 | err = -ENOBUFS; | |
edcd5821 | 1878 | else |
44abdc30 CW |
1879 | rcu_assign_pointer(xfrm_state_afinfo[afinfo->family], afinfo); |
1880 | spin_unlock_bh(&xfrm_state_afinfo_lock); | |
1da177e4 LT |
1881 | return err; |
1882 | } | |
1883 | EXPORT_SYMBOL(xfrm_state_register_afinfo); | |
1884 | ||
1885 | int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo) | |
1886 | { | |
1887 | int err = 0; | |
1888 | if (unlikely(afinfo == NULL)) | |
1889 | return -EINVAL; | |
1890 | if (unlikely(afinfo->family >= NPROTO)) | |
1891 | return -EAFNOSUPPORT; | |
44abdc30 | 1892 | spin_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 LT |
1893 | if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) { |
1894 | if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo)) | |
1895 | err = -EINVAL; | |
edcd5821 | 1896 | else |
44abdc30 | 1897 | RCU_INIT_POINTER(xfrm_state_afinfo[afinfo->family], NULL); |
1da177e4 | 1898 | } |
44abdc30 CW |
1899 | spin_unlock_bh(&xfrm_state_afinfo_lock); |
1900 | synchronize_rcu(); | |
1da177e4 LT |
1901 | return err; |
1902 | } | |
1903 | EXPORT_SYMBOL(xfrm_state_unregister_afinfo); | |
1904 | ||
628e341f | 1905 | struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family) |
1da177e4 LT |
1906 | { |
1907 | struct xfrm_state_afinfo *afinfo; | |
1908 | if (unlikely(family >= NPROTO)) | |
1909 | return NULL; | |
44abdc30 CW |
1910 | rcu_read_lock(); |
1911 | afinfo = rcu_dereference(xfrm_state_afinfo[family]); | |
546be240 | 1912 | if (unlikely(!afinfo)) |
44abdc30 | 1913 | rcu_read_unlock(); |
1da177e4 LT |
1914 | return afinfo; |
1915 | } | |
1916 | ||
628e341f | 1917 | void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo) |
1da177e4 | 1918 | { |
44abdc30 | 1919 | rcu_read_unlock(); |
1da177e4 LT |
1920 | } |
1921 | ||
1922 | /* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */ | |
1923 | void xfrm_state_delete_tunnel(struct xfrm_state *x) | |
1924 | { | |
1925 | if (x->tunnel) { | |
1926 | struct xfrm_state *t = x->tunnel; | |
1927 | ||
1928 | if (atomic_read(&t->tunnel_users) == 2) | |
1929 | xfrm_state_delete(t); | |
1930 | atomic_dec(&t->tunnel_users); | |
1931 | xfrm_state_put(t); | |
1932 | x->tunnel = NULL; | |
1933 | } | |
1934 | } | |
1935 | EXPORT_SYMBOL(xfrm_state_delete_tunnel); | |
1936 | ||
1937 | int xfrm_state_mtu(struct xfrm_state *x, int mtu) | |
1938 | { | |
c5c25238 | 1939 | int res; |
1da177e4 | 1940 | |
c5c25238 PM |
1941 | spin_lock_bh(&x->lock); |
1942 | if (x->km.state == XFRM_STATE_VALID && | |
1943 | x->type && x->type->get_mtu) | |
1944 | res = x->type->get_mtu(x, mtu); | |
1945 | else | |
28121617 | 1946 | res = mtu - x->props.header_len; |
c5c25238 | 1947 | spin_unlock_bh(&x->lock); |
1da177e4 LT |
1948 | return res; |
1949 | } | |
1950 | ||
a454f0cc | 1951 | int __xfrm_init_state(struct xfrm_state *x, bool init_replay) |
72cb6962 | 1952 | { |
d094cd83 | 1953 | struct xfrm_state_afinfo *afinfo; |
df9dcb45 | 1954 | struct xfrm_mode *inner_mode; |
d094cd83 | 1955 | int family = x->props.family; |
72cb6962 HX |
1956 | int err; |
1957 | ||
d094cd83 HX |
1958 | err = -EAFNOSUPPORT; |
1959 | afinfo = xfrm_state_get_afinfo(family); | |
1960 | if (!afinfo) | |
1961 | goto error; | |
1962 | ||
1963 | err = 0; | |
1964 | if (afinfo->init_flags) | |
1965 | err = afinfo->init_flags(x); | |
1966 | ||
1967 | xfrm_state_put_afinfo(afinfo); | |
1968 | ||
1969 | if (err) | |
1970 | goto error; | |
1971 | ||
1972 | err = -EPROTONOSUPPORT; | |
13996378 | 1973 | |
df9dcb45 KM |
1974 | if (x->sel.family != AF_UNSPEC) { |
1975 | inner_mode = xfrm_get_mode(x->props.mode, x->sel.family); | |
1976 | if (inner_mode == NULL) | |
1977 | goto error; | |
1978 | ||
1979 | if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) && | |
1980 | family != x->sel.family) { | |
1981 | xfrm_put_mode(inner_mode); | |
1982 | goto error; | |
1983 | } | |
1984 | ||
1985 | x->inner_mode = inner_mode; | |
1986 | } else { | |
1987 | struct xfrm_mode *inner_mode_iaf; | |
d81d2285 | 1988 | int iafamily = AF_INET; |
df9dcb45 | 1989 | |
d81d2285 | 1990 | inner_mode = xfrm_get_mode(x->props.mode, x->props.family); |
df9dcb45 KM |
1991 | if (inner_mode == NULL) |
1992 | goto error; | |
1993 | ||
1994 | if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) { | |
1995 | xfrm_put_mode(inner_mode); | |
1996 | goto error; | |
1997 | } | |
d81d2285 | 1998 | x->inner_mode = inner_mode; |
df9dcb45 | 1999 | |
d81d2285 MW |
2000 | if (x->props.family == AF_INET) |
2001 | iafamily = AF_INET6; | |
df9dcb45 | 2002 | |
d81d2285 MW |
2003 | inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily); |
2004 | if (inner_mode_iaf) { | |
2005 | if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL) | |
2006 | x->inner_mode_iaf = inner_mode_iaf; | |
2007 | else | |
2008 | xfrm_put_mode(inner_mode_iaf); | |
df9dcb45 KM |
2009 | } |
2010 | } | |
13996378 | 2011 | |
d094cd83 | 2012 | x->type = xfrm_get_type(x->id.proto, family); |
72cb6962 HX |
2013 | if (x->type == NULL) |
2014 | goto error; | |
2015 | ||
2016 | err = x->type->init_state(x); | |
2017 | if (err) | |
2018 | goto error; | |
2019 | ||
13996378 | 2020 | x->outer_mode = xfrm_get_mode(x->props.mode, family); |
599901c3 JL |
2021 | if (x->outer_mode == NULL) { |
2022 | err = -EPROTONOSUPPORT; | |
b59f45d0 | 2023 | goto error; |
599901c3 | 2024 | } |
b59f45d0 | 2025 | |
a454f0cc WY |
2026 | if (init_replay) { |
2027 | err = xfrm_init_replay(x); | |
2028 | if (err) | |
2029 | goto error; | |
2030 | } | |
2031 | ||
72cb6962 HX |
2032 | x->km.state = XFRM_STATE_VALID; |
2033 | ||
2034 | error: | |
2035 | return err; | |
2036 | } | |
2037 | ||
a454f0cc WY |
2038 | EXPORT_SYMBOL(__xfrm_init_state); |
2039 | ||
2040 | int xfrm_init_state(struct xfrm_state *x) | |
2041 | { | |
2042 | return __xfrm_init_state(x, true); | |
2043 | } | |
2044 | ||
72cb6962 | 2045 | EXPORT_SYMBOL(xfrm_init_state); |
a716c119 | 2046 | |
d62ddc21 | 2047 | int __net_init xfrm_state_init(struct net *net) |
1da177e4 | 2048 | { |
f034b5d4 DM |
2049 | unsigned int sz; |
2050 | ||
9d4139c7 AD |
2051 | INIT_LIST_HEAD(&net->xfrm.state_all); |
2052 | ||
f034b5d4 DM |
2053 | sz = sizeof(struct hlist_head) * 8; |
2054 | ||
73d189dc AD |
2055 | net->xfrm.state_bydst = xfrm_hash_alloc(sz); |
2056 | if (!net->xfrm.state_bydst) | |
2057 | goto out_bydst; | |
d320bbb3 AD |
2058 | net->xfrm.state_bysrc = xfrm_hash_alloc(sz); |
2059 | if (!net->xfrm.state_bysrc) | |
2060 | goto out_bysrc; | |
b754a4fd AD |
2061 | net->xfrm.state_byspi = xfrm_hash_alloc(sz); |
2062 | if (!net->xfrm.state_byspi) | |
2063 | goto out_byspi; | |
529983ec | 2064 | net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1); |
1da177e4 | 2065 | |
0bf7c5b0 | 2066 | net->xfrm.state_num = 0; |
63082733 | 2067 | INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize); |
b8a0ae20 | 2068 | INIT_HLIST_HEAD(&net->xfrm.state_gc_list); |
c7837144 | 2069 | INIT_WORK(&net->xfrm.state_gc_work, xfrm_state_gc_task); |
283bc9f3 | 2070 | spin_lock_init(&net->xfrm.xfrm_state_lock); |
d62ddc21 | 2071 | return 0; |
73d189dc | 2072 | |
b754a4fd AD |
2073 | out_byspi: |
2074 | xfrm_hash_free(net->xfrm.state_bysrc, sz); | |
d320bbb3 AD |
2075 | out_bysrc: |
2076 | xfrm_hash_free(net->xfrm.state_bydst, sz); | |
73d189dc AD |
2077 | out_bydst: |
2078 | return -ENOMEM; | |
d62ddc21 AD |
2079 | } |
2080 | ||
2081 | void xfrm_state_fini(struct net *net) | |
2082 | { | |
7c2776ee | 2083 | struct xfrm_audit audit_info; |
73d189dc AD |
2084 | unsigned int sz; |
2085 | ||
7c2776ee | 2086 | flush_work(&net->xfrm.state_hash_work); |
e1760bd5 | 2087 | audit_info.loginuid = INVALID_UID; |
4440e854 | 2088 | audit_info.sessionid = (unsigned int)-1; |
7c2776ee AD |
2089 | audit_info.secid = 0; |
2090 | xfrm_state_flush(net, IPSEC_PROTO_ANY, &audit_info); | |
2091 | flush_work(&net->xfrm.state_gc_work); | |
2092 | ||
9d4139c7 | 2093 | WARN_ON(!list_empty(&net->xfrm.state_all)); |
73d189dc | 2094 | |
529983ec | 2095 | sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head); |
b754a4fd AD |
2096 | WARN_ON(!hlist_empty(net->xfrm.state_byspi)); |
2097 | xfrm_hash_free(net->xfrm.state_byspi, sz); | |
d320bbb3 AD |
2098 | WARN_ON(!hlist_empty(net->xfrm.state_bysrc)); |
2099 | xfrm_hash_free(net->xfrm.state_bysrc, sz); | |
73d189dc AD |
2100 | WARN_ON(!hlist_empty(net->xfrm.state_bydst)); |
2101 | xfrm_hash_free(net->xfrm.state_bydst, sz); | |
1da177e4 LT |
2102 | } |
2103 | ||
ab5f5e8b | 2104 | #ifdef CONFIG_AUDITSYSCALL |
cf35f43e IJ |
2105 | static void xfrm_audit_helper_sainfo(struct xfrm_state *x, |
2106 | struct audit_buffer *audit_buf) | |
ab5f5e8b | 2107 | { |
68277acc PM |
2108 | struct xfrm_sec_ctx *ctx = x->security; |
2109 | u32 spi = ntohl(x->id.spi); | |
2110 | ||
2111 | if (ctx) | |
ab5f5e8b | 2112 | audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s", |
68277acc | 2113 | ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str); |
ab5f5e8b | 2114 | |
9b7a787d | 2115 | switch (x->props.family) { |
ab5f5e8b | 2116 | case AF_INET: |
21454aaa HH |
2117 | audit_log_format(audit_buf, " src=%pI4 dst=%pI4", |
2118 | &x->props.saddr.a4, &x->id.daddr.a4); | |
ab5f5e8b JL |
2119 | break; |
2120 | case AF_INET6: | |
5b095d98 | 2121 | audit_log_format(audit_buf, " src=%pI6 dst=%pI6", |
fdb46ee7 | 2122 | x->props.saddr.a6, x->id.daddr.a6); |
ab5f5e8b JL |
2123 | break; |
2124 | } | |
68277acc PM |
2125 | |
2126 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
ab5f5e8b JL |
2127 | } |
2128 | ||
cf35f43e IJ |
2129 | static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family, |
2130 | struct audit_buffer *audit_buf) | |
afeb14b4 | 2131 | { |
b71d1d42 ED |
2132 | const struct iphdr *iph4; |
2133 | const struct ipv6hdr *iph6; | |
afeb14b4 PM |
2134 | |
2135 | switch (family) { | |
2136 | case AF_INET: | |
2137 | iph4 = ip_hdr(skb); | |
21454aaa HH |
2138 | audit_log_format(audit_buf, " src=%pI4 dst=%pI4", |
2139 | &iph4->saddr, &iph4->daddr); | |
afeb14b4 PM |
2140 | break; |
2141 | case AF_INET6: | |
2142 | iph6 = ipv6_hdr(skb); | |
2143 | audit_log_format(audit_buf, | |
5b095d98 | 2144 | " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x", |
9b7a787d | 2145 | &iph6->saddr, &iph6->daddr, |
afeb14b4 PM |
2146 | iph6->flow_lbl[0] & 0x0f, |
2147 | iph6->flow_lbl[1], | |
2148 | iph6->flow_lbl[2]); | |
2149 | break; | |
2150 | } | |
2151 | } | |
2152 | ||
68277acc | 2153 | void xfrm_audit_state_add(struct xfrm_state *x, int result, |
4440e854 | 2154 | kuid_t auid, unsigned int sessionid, u32 secid) |
ab5f5e8b JL |
2155 | { |
2156 | struct audit_buffer *audit_buf; | |
ab5f5e8b | 2157 | |
afeb14b4 | 2158 | audit_buf = xfrm_audit_start("SAD-add"); |
ab5f5e8b JL |
2159 | if (audit_buf == NULL) |
2160 | return; | |
2532386f | 2161 | xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf); |
afeb14b4 PM |
2162 | xfrm_audit_helper_sainfo(x, audit_buf); |
2163 | audit_log_format(audit_buf, " res=%u", result); | |
ab5f5e8b JL |
2164 | audit_log_end(audit_buf); |
2165 | } | |
2166 | EXPORT_SYMBOL_GPL(xfrm_audit_state_add); | |
2167 | ||
68277acc | 2168 | void xfrm_audit_state_delete(struct xfrm_state *x, int result, |
4440e854 | 2169 | kuid_t auid, unsigned int sessionid, u32 secid) |
ab5f5e8b JL |
2170 | { |
2171 | struct audit_buffer *audit_buf; | |
ab5f5e8b | 2172 | |
afeb14b4 | 2173 | audit_buf = xfrm_audit_start("SAD-delete"); |
ab5f5e8b JL |
2174 | if (audit_buf == NULL) |
2175 | return; | |
2532386f | 2176 | xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf); |
afeb14b4 PM |
2177 | xfrm_audit_helper_sainfo(x, audit_buf); |
2178 | audit_log_format(audit_buf, " res=%u", result); | |
ab5f5e8b JL |
2179 | audit_log_end(audit_buf); |
2180 | } | |
2181 | EXPORT_SYMBOL_GPL(xfrm_audit_state_delete); | |
afeb14b4 PM |
2182 | |
2183 | void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
2184 | struct sk_buff *skb) | |
2185 | { | |
2186 | struct audit_buffer *audit_buf; | |
2187 | u32 spi; | |
2188 | ||
2189 | audit_buf = xfrm_audit_start("SA-replay-overflow"); | |
2190 | if (audit_buf == NULL) | |
2191 | return; | |
2192 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2193 | /* don't record the sequence number because it's inherent in this kind | |
2194 | * of audit message */ | |
2195 | spi = ntohl(x->id.spi); | |
2196 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
2197 | audit_log_end(audit_buf); | |
2198 | } | |
2199 | EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow); | |
2200 | ||
9fdc4883 | 2201 | void xfrm_audit_state_replay(struct xfrm_state *x, |
afeb14b4 PM |
2202 | struct sk_buff *skb, __be32 net_seq) |
2203 | { | |
2204 | struct audit_buffer *audit_buf; | |
2205 | u32 spi; | |
2206 | ||
2207 | audit_buf = xfrm_audit_start("SA-replayed-pkt"); | |
2208 | if (audit_buf == NULL) | |
2209 | return; | |
2210 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2211 | spi = ntohl(x->id.spi); | |
2212 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2213 | spi, spi, ntohl(net_seq)); | |
2214 | audit_log_end(audit_buf); | |
2215 | } | |
9fdc4883 | 2216 | EXPORT_SYMBOL_GPL(xfrm_audit_state_replay); |
afeb14b4 PM |
2217 | |
2218 | void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family) | |
2219 | { | |
2220 | struct audit_buffer *audit_buf; | |
2221 | ||
2222 | audit_buf = xfrm_audit_start("SA-notfound"); | |
2223 | if (audit_buf == NULL) | |
2224 | return; | |
2225 | xfrm_audit_helper_pktinfo(skb, family, audit_buf); | |
2226 | audit_log_end(audit_buf); | |
2227 | } | |
2228 | EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple); | |
2229 | ||
2230 | void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
2231 | __be32 net_spi, __be32 net_seq) | |
2232 | { | |
2233 | struct audit_buffer *audit_buf; | |
2234 | u32 spi; | |
2235 | ||
2236 | audit_buf = xfrm_audit_start("SA-notfound"); | |
2237 | if (audit_buf == NULL) | |
2238 | return; | |
2239 | xfrm_audit_helper_pktinfo(skb, family, audit_buf); | |
2240 | spi = ntohl(net_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 | } | |
2245 | EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound); | |
2246 | ||
2247 | void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
2248 | struct sk_buff *skb, u8 proto) | |
2249 | { | |
2250 | struct audit_buffer *audit_buf; | |
2251 | __be32 net_spi; | |
2252 | __be32 net_seq; | |
2253 | ||
2254 | audit_buf = xfrm_audit_start("SA-icv-failure"); | |
2255 | if (audit_buf == NULL) | |
2256 | return; | |
2257 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2258 | if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) { | |
2259 | u32 spi = ntohl(net_spi); | |
2260 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2261 | spi, spi, ntohl(net_seq)); | |
2262 | } | |
2263 | audit_log_end(audit_buf); | |
2264 | } | |
2265 | EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail); | |
ab5f5e8b | 2266 | #endif /* CONFIG_AUDITSYSCALL */ |