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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> |
7c0f6ba6 | 23 | #include <linux/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 | ||
c8406998 FW |
31 | #define xfrm_state_deref_prot(table, net) \ |
32 | rcu_dereference_protected((table), lockdep_is_held(&(net)->xfrm.xfrm_state_lock)) | |
33 | ||
35db57bb FW |
34 | static void xfrm_state_gc_task(struct work_struct *work); |
35 | ||
1da177e4 LT |
36 | /* Each xfrm_state may be linked to two tables: |
37 | ||
38 | 1. Hash table by (spi,daddr,ah/esp) to find SA by SPI. (input,ctl) | |
a624c108 | 39 | 2. Hash table by (daddr,family,reqid) to find what SAs exist for given |
1da177e4 LT |
40 | destination/tunnel endpoint. (output) |
41 | */ | |
42 | ||
f034b5d4 | 43 | static unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024; |
b65e3d7b | 44 | static __read_mostly seqcount_t xfrm_state_hash_generation = SEQCNT_ZERO(xfrm_state_hash_generation); |
f034b5d4 | 45 | |
35db57bb FW |
46 | static DECLARE_WORK(xfrm_state_gc_work, xfrm_state_gc_task); |
47 | static HLIST_HEAD(xfrm_state_gc_list); | |
48 | ||
02efdff7 FW |
49 | static inline bool xfrm_state_hold_rcu(struct xfrm_state __rcu *x) |
50 | { | |
51 | return atomic_inc_not_zero(&x->refcnt); | |
52 | } | |
53 | ||
64d0cd00 | 54 | static inline unsigned int xfrm_dst_hash(struct net *net, |
2ab38503 DM |
55 | const xfrm_address_t *daddr, |
56 | const xfrm_address_t *saddr, | |
c1969f29 | 57 | u32 reqid, |
a624c108 | 58 | unsigned short family) |
f034b5d4 | 59 | { |
64d0cd00 | 60 | return __xfrm_dst_hash(daddr, saddr, reqid, family, net->xfrm.state_hmask); |
f034b5d4 DM |
61 | } |
62 | ||
64d0cd00 | 63 | static inline unsigned int xfrm_src_hash(struct net *net, |
2ab38503 DM |
64 | const xfrm_address_t *daddr, |
65 | const xfrm_address_t *saddr, | |
44e36b42 | 66 | unsigned short family) |
f034b5d4 | 67 | { |
64d0cd00 | 68 | return __xfrm_src_hash(daddr, saddr, family, net->xfrm.state_hmask); |
f034b5d4 DM |
69 | } |
70 | ||
f034b5d4 | 71 | static inline unsigned int |
2ab38503 DM |
72 | xfrm_spi_hash(struct net *net, const xfrm_address_t *daddr, |
73 | __be32 spi, u8 proto, unsigned short family) | |
f034b5d4 | 74 | { |
64d0cd00 | 75 | return __xfrm_spi_hash(daddr, spi, proto, family, net->xfrm.state_hmask); |
f034b5d4 DM |
76 | } |
77 | ||
f034b5d4 DM |
78 | static void xfrm_hash_transfer(struct hlist_head *list, |
79 | struct hlist_head *ndsttable, | |
80 | struct hlist_head *nsrctable, | |
81 | struct hlist_head *nspitable, | |
82 | unsigned int nhashmask) | |
83 | { | |
b67bfe0d | 84 | struct hlist_node *tmp; |
f034b5d4 DM |
85 | struct xfrm_state *x; |
86 | ||
b67bfe0d | 87 | hlist_for_each_entry_safe(x, tmp, list, bydst) { |
f034b5d4 DM |
88 | unsigned int h; |
89 | ||
c1969f29 DM |
90 | h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr, |
91 | x->props.reqid, x->props.family, | |
92 | nhashmask); | |
ae3fb6d3 | 93 | hlist_add_head_rcu(&x->bydst, ndsttable + h); |
f034b5d4 | 94 | |
667bbcb6 MN |
95 | h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr, |
96 | x->props.family, | |
f034b5d4 | 97 | nhashmask); |
ae3fb6d3 | 98 | hlist_add_head_rcu(&x->bysrc, nsrctable + h); |
f034b5d4 | 99 | |
7b4dc360 MN |
100 | if (x->id.spi) { |
101 | h = __xfrm_spi_hash(&x->id.daddr, x->id.spi, | |
102 | x->id.proto, x->props.family, | |
103 | nhashmask); | |
ae3fb6d3 | 104 | hlist_add_head_rcu(&x->byspi, nspitable + h); |
7b4dc360 | 105 | } |
f034b5d4 DM |
106 | } |
107 | } | |
108 | ||
63082733 | 109 | static unsigned long xfrm_hash_new_size(unsigned int state_hmask) |
f034b5d4 | 110 | { |
63082733 | 111 | return ((state_hmask + 1) << 1) * sizeof(struct hlist_head); |
f034b5d4 DM |
112 | } |
113 | ||
63082733 | 114 | static void xfrm_hash_resize(struct work_struct *work) |
f034b5d4 | 115 | { |
63082733 | 116 | struct net *net = container_of(work, struct net, xfrm.state_hash_work); |
f034b5d4 DM |
117 | struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi; |
118 | unsigned long nsize, osize; | |
119 | unsigned int nhashmask, ohashmask; | |
120 | int i; | |
121 | ||
63082733 | 122 | nsize = xfrm_hash_new_size(net->xfrm.state_hmask); |
44e36b42 | 123 | ndst = xfrm_hash_alloc(nsize); |
f034b5d4 | 124 | if (!ndst) |
0244790c | 125 | return; |
44e36b42 | 126 | nsrc = xfrm_hash_alloc(nsize); |
f034b5d4 | 127 | if (!nsrc) { |
44e36b42 | 128 | xfrm_hash_free(ndst, nsize); |
0244790c | 129 | return; |
f034b5d4 | 130 | } |
44e36b42 | 131 | nspi = xfrm_hash_alloc(nsize); |
f034b5d4 | 132 | if (!nspi) { |
44e36b42 DM |
133 | xfrm_hash_free(ndst, nsize); |
134 | xfrm_hash_free(nsrc, nsize); | |
0244790c | 135 | return; |
f034b5d4 DM |
136 | } |
137 | ||
283bc9f3 | 138 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
b65e3d7b | 139 | write_seqcount_begin(&xfrm_state_hash_generation); |
f034b5d4 DM |
140 | |
141 | nhashmask = (nsize / sizeof(struct hlist_head)) - 1U; | |
c8406998 | 142 | odst = xfrm_state_deref_prot(net->xfrm.state_bydst, net); |
63082733 | 143 | for (i = net->xfrm.state_hmask; i >= 0; i--) |
c8406998 | 144 | xfrm_hash_transfer(odst + i, ndst, nsrc, nspi, nhashmask); |
f034b5d4 | 145 | |
c8406998 FW |
146 | osrc = xfrm_state_deref_prot(net->xfrm.state_bysrc, net); |
147 | ospi = xfrm_state_deref_prot(net->xfrm.state_byspi, net); | |
63082733 | 148 | ohashmask = net->xfrm.state_hmask; |
f034b5d4 | 149 | |
c8406998 FW |
150 | rcu_assign_pointer(net->xfrm.state_bydst, ndst); |
151 | rcu_assign_pointer(net->xfrm.state_bysrc, nsrc); | |
152 | rcu_assign_pointer(net->xfrm.state_byspi, nspi); | |
63082733 | 153 | net->xfrm.state_hmask = nhashmask; |
f034b5d4 | 154 | |
b65e3d7b | 155 | write_seqcount_end(&xfrm_state_hash_generation); |
283bc9f3 | 156 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
f034b5d4 DM |
157 | |
158 | osize = (ohashmask + 1) * sizeof(struct hlist_head); | |
df7274eb FW |
159 | |
160 | synchronize_rcu(); | |
161 | ||
44e36b42 DM |
162 | xfrm_hash_free(odst, osize); |
163 | xfrm_hash_free(osrc, osize); | |
164 | xfrm_hash_free(ospi, osize); | |
f034b5d4 DM |
165 | } |
166 | ||
44abdc30 CW |
167 | static DEFINE_SPINLOCK(xfrm_state_afinfo_lock); |
168 | static struct xfrm_state_afinfo __rcu *xfrm_state_afinfo[NPROTO]; | |
1da177e4 | 169 | |
1da177e4 LT |
170 | static DEFINE_SPINLOCK(xfrm_state_gc_lock); |
171 | ||
53bc6b4d | 172 | int __xfrm_state_delete(struct xfrm_state *x); |
1da177e4 | 173 | |
980ebd25 | 174 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); |
0f24558e | 175 | bool km_is_alive(const struct km_event *c); |
15e47304 | 176 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid); |
1da177e4 | 177 | |
7a9885b9 | 178 | static DEFINE_SPINLOCK(xfrm_type_lock); |
533cb5b0 | 179 | int xfrm_register_type(const struct xfrm_type *type, unsigned short family) |
aa5d62cc | 180 | { |
7a9885b9 | 181 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); |
533cb5b0 | 182 | const struct xfrm_type **typemap; |
aa5d62cc HX |
183 | int err = 0; |
184 | ||
185 | if (unlikely(afinfo == NULL)) | |
186 | return -EAFNOSUPPORT; | |
187 | typemap = afinfo->type_map; | |
7a9885b9 | 188 | spin_lock_bh(&xfrm_type_lock); |
aa5d62cc HX |
189 | |
190 | if (likely(typemap[type->proto] == NULL)) | |
191 | typemap[type->proto] = type; | |
192 | else | |
193 | err = -EEXIST; | |
7a9885b9 | 194 | spin_unlock_bh(&xfrm_type_lock); |
af5d27c4 | 195 | rcu_read_unlock(); |
aa5d62cc HX |
196 | return err; |
197 | } | |
198 | EXPORT_SYMBOL(xfrm_register_type); | |
199 | ||
533cb5b0 | 200 | int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family) |
aa5d62cc | 201 | { |
7a9885b9 | 202 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); |
533cb5b0 | 203 | const struct xfrm_type **typemap; |
aa5d62cc HX |
204 | int err = 0; |
205 | ||
206 | if (unlikely(afinfo == NULL)) | |
207 | return -EAFNOSUPPORT; | |
208 | typemap = afinfo->type_map; | |
7a9885b9 | 209 | spin_lock_bh(&xfrm_type_lock); |
aa5d62cc HX |
210 | |
211 | if (unlikely(typemap[type->proto] != type)) | |
212 | err = -ENOENT; | |
213 | else | |
214 | typemap[type->proto] = NULL; | |
7a9885b9 | 215 | spin_unlock_bh(&xfrm_type_lock); |
af5d27c4 | 216 | rcu_read_unlock(); |
aa5d62cc HX |
217 | return err; |
218 | } | |
219 | EXPORT_SYMBOL(xfrm_unregister_type); | |
220 | ||
533cb5b0 | 221 | static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family) |
aa5d62cc HX |
222 | { |
223 | struct xfrm_state_afinfo *afinfo; | |
533cb5b0 ED |
224 | const struct xfrm_type **typemap; |
225 | const struct xfrm_type *type; | |
aa5d62cc HX |
226 | int modload_attempted = 0; |
227 | ||
228 | retry: | |
229 | afinfo = xfrm_state_get_afinfo(family); | |
230 | if (unlikely(afinfo == NULL)) | |
231 | return NULL; | |
232 | typemap = afinfo->type_map; | |
233 | ||
75cda62d | 234 | type = READ_ONCE(typemap[proto]); |
aa5d62cc HX |
235 | if (unlikely(type && !try_module_get(type->owner))) |
236 | type = NULL; | |
75cda62d FW |
237 | |
238 | rcu_read_unlock(); | |
239 | ||
aa5d62cc | 240 | if (!type && !modload_attempted) { |
aa5d62cc HX |
241 | request_module("xfrm-type-%d-%d", family, proto); |
242 | modload_attempted = 1; | |
243 | goto retry; | |
244 | } | |
245 | ||
aa5d62cc HX |
246 | return type; |
247 | } | |
248 | ||
533cb5b0 | 249 | static void xfrm_put_type(const struct xfrm_type *type) |
aa5d62cc HX |
250 | { |
251 | module_put(type->owner); | |
252 | } | |
253 | ||
7a9885b9 | 254 | static DEFINE_SPINLOCK(xfrm_mode_lock); |
aa5d62cc HX |
255 | int xfrm_register_mode(struct xfrm_mode *mode, int family) |
256 | { | |
257 | struct xfrm_state_afinfo *afinfo; | |
258 | struct xfrm_mode **modemap; | |
259 | int err; | |
260 | ||
261 | if (unlikely(mode->encap >= XFRM_MODE_MAX)) | |
262 | return -EINVAL; | |
263 | ||
7a9885b9 | 264 | afinfo = xfrm_state_get_afinfo(family); |
aa5d62cc HX |
265 | if (unlikely(afinfo == NULL)) |
266 | return -EAFNOSUPPORT; | |
267 | ||
268 | err = -EEXIST; | |
269 | modemap = afinfo->mode_map; | |
7a9885b9 | 270 | spin_lock_bh(&xfrm_mode_lock); |
17c2a42a HX |
271 | if (modemap[mode->encap]) |
272 | goto out; | |
aa5d62cc | 273 | |
17c2a42a HX |
274 | err = -ENOENT; |
275 | if (!try_module_get(afinfo->owner)) | |
276 | goto out; | |
277 | ||
278 | mode->afinfo = afinfo; | |
279 | modemap[mode->encap] = mode; | |
280 | err = 0; | |
281 | ||
282 | out: | |
7a9885b9 | 283 | spin_unlock_bh(&xfrm_mode_lock); |
af5d27c4 | 284 | rcu_read_unlock(); |
aa5d62cc HX |
285 | return err; |
286 | } | |
287 | EXPORT_SYMBOL(xfrm_register_mode); | |
288 | ||
289 | int xfrm_unregister_mode(struct xfrm_mode *mode, int family) | |
290 | { | |
291 | struct xfrm_state_afinfo *afinfo; | |
292 | struct xfrm_mode **modemap; | |
293 | int err; | |
294 | ||
295 | if (unlikely(mode->encap >= XFRM_MODE_MAX)) | |
296 | return -EINVAL; | |
297 | ||
7a9885b9 | 298 | afinfo = xfrm_state_get_afinfo(family); |
aa5d62cc HX |
299 | if (unlikely(afinfo == NULL)) |
300 | return -EAFNOSUPPORT; | |
301 | ||
302 | err = -ENOENT; | |
303 | modemap = afinfo->mode_map; | |
7a9885b9 | 304 | spin_lock_bh(&xfrm_mode_lock); |
aa5d62cc HX |
305 | if (likely(modemap[mode->encap] == mode)) { |
306 | modemap[mode->encap] = NULL; | |
17c2a42a | 307 | module_put(mode->afinfo->owner); |
aa5d62cc HX |
308 | err = 0; |
309 | } | |
310 | ||
7a9885b9 | 311 | spin_unlock_bh(&xfrm_mode_lock); |
af5d27c4 | 312 | rcu_read_unlock(); |
aa5d62cc HX |
313 | return err; |
314 | } | |
315 | EXPORT_SYMBOL(xfrm_unregister_mode); | |
316 | ||
317 | static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family) | |
318 | { | |
319 | struct xfrm_state_afinfo *afinfo; | |
320 | struct xfrm_mode *mode; | |
321 | int modload_attempted = 0; | |
322 | ||
323 | if (unlikely(encap >= XFRM_MODE_MAX)) | |
324 | return NULL; | |
325 | ||
326 | retry: | |
327 | afinfo = xfrm_state_get_afinfo(family); | |
328 | if (unlikely(afinfo == NULL)) | |
329 | return NULL; | |
330 | ||
75cda62d | 331 | mode = READ_ONCE(afinfo->mode_map[encap]); |
aa5d62cc HX |
332 | if (unlikely(mode && !try_module_get(mode->owner))) |
333 | mode = NULL; | |
75cda62d FW |
334 | |
335 | rcu_read_unlock(); | |
aa5d62cc | 336 | if (!mode && !modload_attempted) { |
aa5d62cc HX |
337 | request_module("xfrm-mode-%d-%d", family, encap); |
338 | modload_attempted = 1; | |
339 | goto retry; | |
340 | } | |
341 | ||
aa5d62cc HX |
342 | return mode; |
343 | } | |
344 | ||
345 | static void xfrm_put_mode(struct xfrm_mode *mode) | |
346 | { | |
347 | module_put(mode->owner); | |
348 | } | |
349 | ||
1da177e4 LT |
350 | static void xfrm_state_gc_destroy(struct xfrm_state *x) |
351 | { | |
9e0d57fd | 352 | tasklet_hrtimer_cancel(&x->mtimer); |
a47f0ce0 | 353 | del_timer_sync(&x->rtimer); |
b5884793 | 354 | kfree(x->aead); |
a51482bd JJ |
355 | kfree(x->aalg); |
356 | kfree(x->ealg); | |
357 | kfree(x->calg); | |
358 | kfree(x->encap); | |
060f02a3 | 359 | kfree(x->coaddr); |
d8647b79 SK |
360 | kfree(x->replay_esn); |
361 | kfree(x->preplay_esn); | |
13996378 HX |
362 | if (x->inner_mode) |
363 | xfrm_put_mode(x->inner_mode); | |
df9dcb45 KM |
364 | if (x->inner_mode_iaf) |
365 | xfrm_put_mode(x->inner_mode_iaf); | |
13996378 HX |
366 | if (x->outer_mode) |
367 | xfrm_put_mode(x->outer_mode); | |
1da177e4 LT |
368 | if (x->type) { |
369 | x->type->destructor(x); | |
370 | xfrm_put_type(x->type); | |
371 | } | |
df71837d | 372 | security_xfrm_state_free(x); |
1da177e4 LT |
373 | kfree(x); |
374 | } | |
375 | ||
c7837144 | 376 | static void xfrm_state_gc_task(struct work_struct *work) |
1da177e4 | 377 | { |
12a169e7 | 378 | struct xfrm_state *x; |
b67bfe0d | 379 | struct hlist_node *tmp; |
12a169e7 | 380 | struct hlist_head gc_list; |
1da177e4 | 381 | |
1da177e4 | 382 | spin_lock_bh(&xfrm_state_gc_lock); |
35db57bb | 383 | hlist_move_list(&xfrm_state_gc_list, &gc_list); |
1da177e4 LT |
384 | spin_unlock_bh(&xfrm_state_gc_lock); |
385 | ||
df7274eb FW |
386 | synchronize_rcu(); |
387 | ||
b67bfe0d | 388 | hlist_for_each_entry_safe(x, tmp, &gc_list, gclist) |
1da177e4 | 389 | xfrm_state_gc_destroy(x); |
1da177e4 LT |
390 | } |
391 | ||
3e94c2dc | 392 | static enum hrtimer_restart xfrm_timer_handler(struct hrtimer *me) |
1da177e4 | 393 | { |
9e0d57fd YP |
394 | struct tasklet_hrtimer *thr = container_of(me, struct tasklet_hrtimer, timer); |
395 | struct xfrm_state *x = container_of(thr, struct xfrm_state, mtimer); | |
9d729f72 | 396 | unsigned long now = get_seconds(); |
1da177e4 LT |
397 | long next = LONG_MAX; |
398 | int warn = 0; | |
161a09e7 | 399 | int err = 0; |
1da177e4 LT |
400 | |
401 | spin_lock(&x->lock); | |
402 | if (x->km.state == XFRM_STATE_DEAD) | |
403 | goto out; | |
404 | if (x->km.state == XFRM_STATE_EXPIRED) | |
405 | goto expired; | |
406 | if (x->lft.hard_add_expires_seconds) { | |
407 | long tmo = x->lft.hard_add_expires_seconds + | |
408 | x->curlft.add_time - now; | |
e3c0d047 FD |
409 | if (tmo <= 0) { |
410 | if (x->xflags & XFRM_SOFT_EXPIRE) { | |
411 | /* enter hard expire without soft expire first?! | |
412 | * setting a new date could trigger this. | |
1365e547 | 413 | * workaround: fix x->curflt.add_time by below: |
e3c0d047 FD |
414 | */ |
415 | x->curlft.add_time = now - x->saved_tmo - 1; | |
416 | tmo = x->lft.hard_add_expires_seconds - x->saved_tmo; | |
417 | } else | |
418 | goto expired; | |
419 | } | |
1da177e4 LT |
420 | if (tmo < next) |
421 | next = tmo; | |
422 | } | |
423 | if (x->lft.hard_use_expires_seconds) { | |
424 | long tmo = x->lft.hard_use_expires_seconds + | |
425 | (x->curlft.use_time ? : now) - now; | |
426 | if (tmo <= 0) | |
427 | goto expired; | |
428 | if (tmo < next) | |
429 | next = tmo; | |
430 | } | |
431 | if (x->km.dying) | |
432 | goto resched; | |
433 | if (x->lft.soft_add_expires_seconds) { | |
434 | long tmo = x->lft.soft_add_expires_seconds + | |
435 | x->curlft.add_time - now; | |
e3c0d047 | 436 | if (tmo <= 0) { |
1da177e4 | 437 | warn = 1; |
e3c0d047 FD |
438 | x->xflags &= ~XFRM_SOFT_EXPIRE; |
439 | } else if (tmo < next) { | |
1da177e4 | 440 | next = tmo; |
e3c0d047 FD |
441 | x->xflags |= XFRM_SOFT_EXPIRE; |
442 | x->saved_tmo = tmo; | |
443 | } | |
1da177e4 LT |
444 | } |
445 | if (x->lft.soft_use_expires_seconds) { | |
446 | long tmo = x->lft.soft_use_expires_seconds + | |
447 | (x->curlft.use_time ? : now) - now; | |
448 | if (tmo <= 0) | |
449 | warn = 1; | |
450 | else if (tmo < next) | |
451 | next = tmo; | |
452 | } | |
453 | ||
4666faab | 454 | x->km.dying = warn; |
1da177e4 | 455 | if (warn) |
53bc6b4d | 456 | km_state_expired(x, 0, 0); |
1da177e4 | 457 | resched: |
9b7a787d | 458 | if (next != LONG_MAX) { |
9e0d57fd YP |
459 | tasklet_hrtimer_start(&x->mtimer, ktime_set(next, 0), HRTIMER_MODE_REL); |
460 | } | |
a47f0ce0 | 461 | |
1da177e4 LT |
462 | goto out; |
463 | ||
464 | expired: | |
5b8ef341 | 465 | if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) |
1da177e4 | 466 | x->km.state = XFRM_STATE_EXPIRED; |
161a09e7 JL |
467 | |
468 | err = __xfrm_state_delete(x); | |
0806ae4c | 469 | if (!err) |
53bc6b4d | 470 | km_state_expired(x, 1, 0); |
1da177e4 | 471 | |
2e71029e | 472 | xfrm_audit_state_delete(x, err ? 0 : 1, true); |
161a09e7 | 473 | |
1da177e4 LT |
474 | out: |
475 | spin_unlock(&x->lock); | |
9e0d57fd | 476 | return HRTIMER_NORESTART; |
1da177e4 LT |
477 | } |
478 | ||
0ac84752 DM |
479 | static void xfrm_replay_timer_handler(unsigned long data); |
480 | ||
673c09be | 481 | struct xfrm_state *xfrm_state_alloc(struct net *net) |
1da177e4 LT |
482 | { |
483 | struct xfrm_state *x; | |
484 | ||
0da974f4 | 485 | x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC); |
1da177e4 LT |
486 | |
487 | if (x) { | |
673c09be | 488 | write_pnet(&x->xs_net, net); |
1da177e4 LT |
489 | atomic_set(&x->refcnt, 1); |
490 | atomic_set(&x->tunnel_users, 0); | |
12a169e7 | 491 | INIT_LIST_HEAD(&x->km.all); |
8f126e37 DM |
492 | INIT_HLIST_NODE(&x->bydst); |
493 | INIT_HLIST_NODE(&x->bysrc); | |
494 | INIT_HLIST_NODE(&x->byspi); | |
99565a6c FD |
495 | tasklet_hrtimer_init(&x->mtimer, xfrm_timer_handler, |
496 | CLOCK_BOOTTIME, HRTIMER_MODE_ABS); | |
b24b8a24 PE |
497 | setup_timer(&x->rtimer, xfrm_replay_timer_handler, |
498 | (unsigned long)x); | |
9d729f72 | 499 | x->curlft.add_time = get_seconds(); |
1da177e4 LT |
500 | x->lft.soft_byte_limit = XFRM_INF; |
501 | x->lft.soft_packet_limit = XFRM_INF; | |
502 | x->lft.hard_byte_limit = XFRM_INF; | |
503 | x->lft.hard_packet_limit = XFRM_INF; | |
f8cd5488 JHS |
504 | x->replay_maxage = 0; |
505 | x->replay_maxdiff = 0; | |
df9dcb45 KM |
506 | x->inner_mode = NULL; |
507 | x->inner_mode_iaf = NULL; | |
1da177e4 LT |
508 | spin_lock_init(&x->lock); |
509 | } | |
510 | return x; | |
511 | } | |
512 | EXPORT_SYMBOL(xfrm_state_alloc); | |
513 | ||
514 | void __xfrm_state_destroy(struct xfrm_state *x) | |
515 | { | |
547b792c | 516 | WARN_ON(x->km.state != XFRM_STATE_DEAD); |
1da177e4 LT |
517 | |
518 | spin_lock_bh(&xfrm_state_gc_lock); | |
35db57bb | 519 | hlist_add_head(&x->gclist, &xfrm_state_gc_list); |
1da177e4 | 520 | spin_unlock_bh(&xfrm_state_gc_lock); |
35db57bb | 521 | schedule_work(&xfrm_state_gc_work); |
1da177e4 LT |
522 | } |
523 | EXPORT_SYMBOL(__xfrm_state_destroy); | |
524 | ||
53bc6b4d | 525 | int __xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 526 | { |
98806f75 | 527 | struct net *net = xs_net(x); |
26b15dad JHS |
528 | int err = -ESRCH; |
529 | ||
1da177e4 LT |
530 | if (x->km.state != XFRM_STATE_DEAD) { |
531 | x->km.state = XFRM_STATE_DEAD; | |
283bc9f3 | 532 | spin_lock(&net->xfrm.xfrm_state_lock); |
12a169e7 | 533 | list_del(&x->km.all); |
ae3fb6d3 FW |
534 | hlist_del_rcu(&x->bydst); |
535 | hlist_del_rcu(&x->bysrc); | |
a47f0ce0 | 536 | if (x->id.spi) |
ae3fb6d3 | 537 | hlist_del_rcu(&x->byspi); |
98806f75 | 538 | net->xfrm.state_num--; |
283bc9f3 | 539 | spin_unlock(&net->xfrm.xfrm_state_lock); |
1da177e4 | 540 | |
1da177e4 LT |
541 | /* All xfrm_state objects are created by xfrm_state_alloc. |
542 | * The xfrm_state_alloc call gives a reference, and that | |
543 | * is what we are dropping here. | |
544 | */ | |
5dba4797 | 545 | xfrm_state_put(x); |
26b15dad | 546 | err = 0; |
1da177e4 | 547 | } |
26b15dad JHS |
548 | |
549 | return err; | |
1da177e4 | 550 | } |
53bc6b4d | 551 | EXPORT_SYMBOL(__xfrm_state_delete); |
1da177e4 | 552 | |
26b15dad | 553 | int xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 554 | { |
26b15dad JHS |
555 | int err; |
556 | ||
1da177e4 | 557 | spin_lock_bh(&x->lock); |
26b15dad | 558 | err = __xfrm_state_delete(x); |
1da177e4 | 559 | spin_unlock_bh(&x->lock); |
26b15dad JHS |
560 | |
561 | return err; | |
1da177e4 LT |
562 | } |
563 | EXPORT_SYMBOL(xfrm_state_delete); | |
564 | ||
4aa2e62c JL |
565 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
566 | static inline int | |
2e71029e | 567 | xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid) |
1da177e4 | 568 | { |
4aa2e62c JL |
569 | int i, err = 0; |
570 | ||
0e602451 | 571 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
4aa2e62c JL |
572 | struct xfrm_state *x; |
573 | ||
b67bfe0d | 574 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
4aa2e62c JL |
575 | if (xfrm_id_proto_match(x->id.proto, proto) && |
576 | (err = security_xfrm_state_delete(x)) != 0) { | |
2e71029e | 577 | xfrm_audit_state_delete(x, 0, task_valid); |
4aa2e62c JL |
578 | return err; |
579 | } | |
580 | } | |
581 | } | |
582 | ||
583 | return err; | |
584 | } | |
585 | #else | |
586 | static inline int | |
2e71029e | 587 | xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid) |
4aa2e62c JL |
588 | { |
589 | return 0; | |
590 | } | |
591 | #endif | |
592 | ||
2e71029e | 593 | int xfrm_state_flush(struct net *net, u8 proto, bool task_valid) |
4aa2e62c | 594 | { |
9e64cc95 | 595 | int i, err = 0, cnt = 0; |
1da177e4 | 596 | |
283bc9f3 | 597 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
2e71029e | 598 | err = xfrm_state_flush_secctx_check(net, proto, task_valid); |
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 | 613 | xfrm_audit_state_delete(x, err ? 0 : 1, |
2e71029e | 614 | task_valid); |
1da177e4 | 615 | xfrm_state_put(x); |
9e64cc95 JHS |
616 | if (!err) |
617 | cnt++; | |
1da177e4 | 618 | |
283bc9f3 | 619 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
620 | goto restart; |
621 | } | |
622 | } | |
623 | } | |
9e64cc95 JHS |
624 | if (cnt) |
625 | err = 0; | |
4aa2e62c JL |
626 | |
627 | out: | |
283bc9f3 | 628 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
4aa2e62c | 629 | return err; |
1da177e4 LT |
630 | } |
631 | EXPORT_SYMBOL(xfrm_state_flush); | |
632 | ||
e071041b | 633 | void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si) |
28d8909b | 634 | { |
283bc9f3 | 635 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
e071041b AD |
636 | si->sadcnt = net->xfrm.state_num; |
637 | si->sadhcnt = net->xfrm.state_hmask; | |
28d8909b | 638 | si->sadhmcnt = xfrm_state_hashmax; |
283bc9f3 | 639 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
28d8909b JHS |
640 | } |
641 | EXPORT_SYMBOL(xfrm_sad_getinfo); | |
642 | ||
711059b9 | 643 | static void |
1a898592 | 644 | xfrm_init_tempstate(struct xfrm_state *x, const struct flowi *fl, |
04686013 | 645 | const struct xfrm_tmpl *tmpl, |
33765d06 | 646 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
8444cf71 | 647 | unsigned short family) |
1da177e4 | 648 | { |
711059b9 FW |
649 | struct xfrm_state_afinfo *afinfo = xfrm_state_afinfo_get_rcu(family); |
650 | ||
3819a35f FW |
651 | if (!afinfo) |
652 | return; | |
653 | ||
654 | afinfo->init_tempsel(&x->sel, fl); | |
8444cf71 TE |
655 | |
656 | if (family != tmpl->encap_family) { | |
711059b9 | 657 | afinfo = xfrm_state_afinfo_get_rcu(tmpl->encap_family); |
8444cf71 | 658 | if (!afinfo) |
711059b9 | 659 | return; |
8444cf71 TE |
660 | } |
661 | afinfo->init_temprop(x, tmpl, daddr, saddr); | |
1da177e4 LT |
662 | } |
663 | ||
9aa60088 DM |
664 | static struct xfrm_state *__xfrm_state_lookup(struct net *net, u32 mark, |
665 | const xfrm_address_t *daddr, | |
666 | __be32 spi, u8 proto, | |
667 | unsigned short family) | |
edcd5821 | 668 | { |
221df1ed | 669 | unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family); |
edcd5821 DM |
670 | struct xfrm_state *x; |
671 | ||
ae3fb6d3 | 672 | hlist_for_each_entry_rcu(x, net->xfrm.state_byspi + h, byspi) { |
edcd5821 DM |
673 | if (x->props.family != family || |
674 | x->id.spi != spi || | |
1802571b | 675 | x->id.proto != proto || |
70e94e66 | 676 | !xfrm_addr_equal(&x->id.daddr, daddr, family)) |
edcd5821 DM |
677 | continue; |
678 | ||
3d6acfa7 JHS |
679 | if ((mark & x->mark.m) != x->mark.v) |
680 | continue; | |
02efdff7 FW |
681 | if (!xfrm_state_hold_rcu(x)) |
682 | continue; | |
edcd5821 DM |
683 | return x; |
684 | } | |
685 | ||
686 | return NULL; | |
687 | } | |
688 | ||
9aa60088 DM |
689 | static struct xfrm_state *__xfrm_state_lookup_byaddr(struct net *net, u32 mark, |
690 | const xfrm_address_t *daddr, | |
691 | const xfrm_address_t *saddr, | |
692 | u8 proto, unsigned short family) | |
edcd5821 | 693 | { |
221df1ed | 694 | unsigned int h = xfrm_src_hash(net, daddr, saddr, family); |
edcd5821 DM |
695 | struct xfrm_state *x; |
696 | ||
ae3fb6d3 | 697 | hlist_for_each_entry_rcu(x, net->xfrm.state_bysrc + h, bysrc) { |
edcd5821 | 698 | if (x->props.family != family || |
1802571b | 699 | x->id.proto != proto || |
70e94e66 YH |
700 | !xfrm_addr_equal(&x->id.daddr, daddr, family) || |
701 | !xfrm_addr_equal(&x->props.saddr, saddr, family)) | |
edcd5821 DM |
702 | continue; |
703 | ||
3d6acfa7 JHS |
704 | if ((mark & x->mark.m) != x->mark.v) |
705 | continue; | |
02efdff7 FW |
706 | if (!xfrm_state_hold_rcu(x)) |
707 | continue; | |
edcd5821 DM |
708 | return x; |
709 | } | |
710 | ||
711 | return NULL; | |
712 | } | |
713 | ||
714 | static inline struct xfrm_state * | |
715 | __xfrm_state_locate(struct xfrm_state *x, int use_spi, int family) | |
716 | { | |
221df1ed | 717 | struct net *net = xs_net(x); |
bd55775c | 718 | u32 mark = x->mark.v & x->mark.m; |
221df1ed | 719 | |
edcd5821 | 720 | if (use_spi) |
bd55775c JHS |
721 | return __xfrm_state_lookup(net, mark, &x->id.daddr, |
722 | x->id.spi, x->id.proto, family); | |
edcd5821 | 723 | else |
bd55775c JHS |
724 | return __xfrm_state_lookup_byaddr(net, mark, |
725 | &x->id.daddr, | |
edcd5821 DM |
726 | &x->props.saddr, |
727 | x->id.proto, family); | |
728 | } | |
729 | ||
98806f75 | 730 | static void xfrm_hash_grow_check(struct net *net, int have_hash_collision) |
2fab22f2 PM |
731 | { |
732 | if (have_hash_collision && | |
98806f75 AD |
733 | (net->xfrm.state_hmask + 1) < xfrm_state_hashmax && |
734 | net->xfrm.state_num > net->xfrm.state_hmask) | |
735 | schedule_work(&net->xfrm.state_hash_work); | |
2fab22f2 PM |
736 | } |
737 | ||
08ec9af1 | 738 | static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x, |
4a08ab0f | 739 | const struct flowi *fl, unsigned short family, |
08ec9af1 DM |
740 | struct xfrm_state **best, int *acq_in_progress, |
741 | int *error) | |
742 | { | |
743 | /* Resolution logic: | |
744 | * 1. There is a valid state with matching selector. Done. | |
745 | * 2. Valid state with inappropriate selector. Skip. | |
746 | * | |
747 | * Entering area of "sysdeps". | |
748 | * | |
749 | * 3. If state is not valid, selector is temporary, it selects | |
750 | * only session which triggered previous resolution. Key | |
751 | * manager will do something to install a state with proper | |
752 | * selector. | |
753 | */ | |
754 | if (x->km.state == XFRM_STATE_VALID) { | |
755 | if ((x->sel.family && | |
756 | !xfrm_selector_match(&x->sel, fl, x->sel.family)) || | |
757 | !security_xfrm_state_pol_flow_match(x, pol, fl)) | |
758 | return; | |
759 | ||
760 | if (!*best || | |
761 | (*best)->km.dying > x->km.dying || | |
762 | ((*best)->km.dying == x->km.dying && | |
763 | (*best)->curlft.add_time < x->curlft.add_time)) | |
764 | *best = x; | |
765 | } else if (x->km.state == XFRM_STATE_ACQ) { | |
766 | *acq_in_progress = 1; | |
767 | } else if (x->km.state == XFRM_STATE_ERROR || | |
768 | x->km.state == XFRM_STATE_EXPIRED) { | |
769 | if (xfrm_selector_match(&x->sel, fl, x->sel.family) && | |
770 | security_xfrm_state_pol_flow_match(x, pol, fl)) | |
771 | *error = -ESRCH; | |
772 | } | |
773 | } | |
774 | ||
1da177e4 | 775 | struct xfrm_state * |
33765d06 | 776 | xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
b520e9f6 | 777 | const struct flowi *fl, struct xfrm_tmpl *tmpl, |
1da177e4 LT |
778 | struct xfrm_policy *pol, int *err, |
779 | unsigned short family) | |
780 | { | |
08ec9af1 | 781 | static xfrm_address_t saddr_wildcard = { }; |
5447c5e4 | 782 | struct net *net = xp_net(pol); |
6a783c90 | 783 | unsigned int h, h_wildcard; |
37b08e34 | 784 | struct xfrm_state *x, *x0, *to_put; |
1da177e4 LT |
785 | int acquire_in_progress = 0; |
786 | int error = 0; | |
787 | struct xfrm_state *best = NULL; | |
bd55775c | 788 | u32 mark = pol->mark.v & pol->mark.m; |
8444cf71 | 789 | unsigned short encap_family = tmpl->encap_family; |
b65e3d7b | 790 | unsigned int sequence; |
0f24558e | 791 | struct km_event c; |
a716c119 | 792 | |
37b08e34 DM |
793 | to_put = NULL; |
794 | ||
b65e3d7b FW |
795 | sequence = read_seqcount_begin(&xfrm_state_hash_generation); |
796 | ||
d737a580 | 797 | rcu_read_lock(); |
8444cf71 | 798 | h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family); |
ae3fb6d3 | 799 | hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h, bydst) { |
8444cf71 | 800 | if (x->props.family == encap_family && |
1da177e4 | 801 | x->props.reqid == tmpl->reqid && |
3d6acfa7 | 802 | (mark & x->mark.m) == x->mark.v && |
fbd9a5b4 | 803 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
8444cf71 | 804 | xfrm_state_addr_check(x, daddr, saddr, encap_family) && |
1da177e4 LT |
805 | tmpl->mode == x->props.mode && |
806 | tmpl->id.proto == x->id.proto && | |
08ec9af1 | 807 | (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) |
1f673c5f | 808 | xfrm_state_look_at(pol, x, fl, encap_family, |
08ec9af1 DM |
809 | &best, &acquire_in_progress, &error); |
810 | } | |
6f115638 | 811 | if (best || acquire_in_progress) |
08ec9af1 DM |
812 | goto found; |
813 | ||
8444cf71 | 814 | h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, encap_family); |
ae3fb6d3 | 815 | hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h_wildcard, bydst) { |
8444cf71 | 816 | if (x->props.family == encap_family && |
08ec9af1 | 817 | x->props.reqid == tmpl->reqid && |
3d6acfa7 | 818 | (mark & x->mark.m) == x->mark.v && |
08ec9af1 | 819 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
f59bbdfa | 820 | xfrm_addr_equal(&x->id.daddr, daddr, encap_family) && |
08ec9af1 DM |
821 | tmpl->mode == x->props.mode && |
822 | tmpl->id.proto == x->id.proto && | |
823 | (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) | |
1f673c5f | 824 | xfrm_state_look_at(pol, x, fl, encap_family, |
08ec9af1 | 825 | &best, &acquire_in_progress, &error); |
1da177e4 LT |
826 | } |
827 | ||
08ec9af1 | 828 | found: |
1da177e4 LT |
829 | x = best; |
830 | if (!x && !error && !acquire_in_progress) { | |
5c5d281a | 831 | if (tmpl->id.spi && |
bd55775c | 832 | (x0 = __xfrm_state_lookup(net, mark, daddr, tmpl->id.spi, |
8444cf71 | 833 | tmpl->id.proto, encap_family)) != NULL) { |
37b08e34 | 834 | to_put = x0; |
1da177e4 LT |
835 | error = -EEXIST; |
836 | goto out; | |
837 | } | |
0f24558e HG |
838 | |
839 | c.net = net; | |
840 | /* If the KMs have no listeners (yet...), avoid allocating an SA | |
841 | * for each and every packet - garbage collection might not | |
842 | * handle the flood. | |
843 | */ | |
844 | if (!km_is_alive(&c)) { | |
845 | error = -ESRCH; | |
846 | goto out; | |
847 | } | |
848 | ||
5447c5e4 | 849 | x = xfrm_state_alloc(net); |
1da177e4 LT |
850 | if (x == NULL) { |
851 | error = -ENOMEM; | |
852 | goto out; | |
853 | } | |
8444cf71 | 854 | /* Initialize temporary state matching only |
1da177e4 | 855 | * to current session. */ |
8444cf71 | 856 | xfrm_init_tempstate(x, fl, tmpl, daddr, saddr, family); |
bd55775c | 857 | memcpy(&x->mark, &pol->mark, sizeof(x->mark)); |
1da177e4 | 858 | |
1d28f42c | 859 | error = security_xfrm_state_alloc_acquire(x, pol->security, fl->flowi_secid); |
e0d1caa7 VY |
860 | if (error) { |
861 | x->km.state = XFRM_STATE_DEAD; | |
37b08e34 | 862 | to_put = x; |
e0d1caa7 VY |
863 | x = NULL; |
864 | goto out; | |
865 | } | |
866 | ||
1da177e4 | 867 | if (km_query(x, tmpl, pol) == 0) { |
d737a580 | 868 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 869 | x->km.state = XFRM_STATE_ACQ; |
5447c5e4 | 870 | list_add(&x->km.all, &net->xfrm.state_all); |
ae3fb6d3 | 871 | hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h); |
8444cf71 | 872 | h = xfrm_src_hash(net, daddr, saddr, encap_family); |
ae3fb6d3 | 873 | hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h); |
1da177e4 | 874 | if (x->id.spi) { |
8444cf71 | 875 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, encap_family); |
ae3fb6d3 | 876 | hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h); |
1da177e4 | 877 | } |
b27aeadb | 878 | x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires; |
9e0d57fd | 879 | tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL); |
5447c5e4 AD |
880 | net->xfrm.state_num++; |
881 | xfrm_hash_grow_check(net, x->bydst.next != NULL); | |
d737a580 | 882 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
883 | } else { |
884 | x->km.state = XFRM_STATE_DEAD; | |
37b08e34 | 885 | to_put = x; |
1da177e4 LT |
886 | x = NULL; |
887 | error = -ESRCH; | |
888 | } | |
889 | } | |
890 | out: | |
02efdff7 FW |
891 | if (x) { |
892 | if (!xfrm_state_hold_rcu(x)) { | |
893 | *err = -EAGAIN; | |
894 | x = NULL; | |
895 | } | |
896 | } else { | |
1da177e4 | 897 | *err = acquire_in_progress ? -EAGAIN : error; |
02efdff7 | 898 | } |
d737a580 | 899 | rcu_read_unlock(); |
37b08e34 DM |
900 | if (to_put) |
901 | xfrm_state_put(to_put); | |
b65e3d7b FW |
902 | |
903 | if (read_seqcount_retry(&xfrm_state_hash_generation, sequence)) { | |
904 | *err = -EAGAIN; | |
905 | if (x) { | |
906 | xfrm_state_put(x); | |
907 | x = NULL; | |
908 | } | |
909 | } | |
910 | ||
1da177e4 LT |
911 | return x; |
912 | } | |
913 | ||
628529b6 | 914 | struct xfrm_state * |
bd55775c | 915 | xfrm_stateonly_find(struct net *net, u32 mark, |
5447c5e4 | 916 | xfrm_address_t *daddr, xfrm_address_t *saddr, |
628529b6 JHS |
917 | unsigned short family, u8 mode, u8 proto, u32 reqid) |
918 | { | |
4bda4f25 | 919 | unsigned int h; |
628529b6 | 920 | struct xfrm_state *rx = NULL, *x = NULL; |
628529b6 | 921 | |
4ae770bf | 922 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
5447c5e4 | 923 | h = xfrm_dst_hash(net, daddr, saddr, reqid, family); |
b67bfe0d | 924 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
628529b6 JHS |
925 | if (x->props.family == family && |
926 | x->props.reqid == reqid && | |
3d6acfa7 | 927 | (mark & x->mark.m) == x->mark.v && |
628529b6 JHS |
928 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
929 | xfrm_state_addr_check(x, daddr, saddr, family) && | |
930 | mode == x->props.mode && | |
931 | proto == x->id.proto && | |
932 | x->km.state == XFRM_STATE_VALID) { | |
933 | rx = x; | |
934 | break; | |
935 | } | |
936 | } | |
937 | ||
938 | if (rx) | |
939 | xfrm_state_hold(rx); | |
4ae770bf | 940 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
628529b6 JHS |
941 | |
942 | ||
943 | return rx; | |
944 | } | |
945 | EXPORT_SYMBOL(xfrm_stateonly_find); | |
946 | ||
c454997e FD |
947 | struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi, |
948 | unsigned short family) | |
949 | { | |
950 | struct xfrm_state *x; | |
951 | struct xfrm_state_walk *w; | |
952 | ||
953 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
954 | list_for_each_entry(w, &net->xfrm.state_all, all) { | |
955 | x = container_of(w, struct xfrm_state, km); | |
956 | if (x->props.family != family || | |
957 | x->id.spi != spi) | |
958 | continue; | |
959 | ||
c454997e | 960 | xfrm_state_hold(x); |
bdddbf69 | 961 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
c454997e FD |
962 | return x; |
963 | } | |
964 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); | |
965 | return NULL; | |
966 | } | |
967 | EXPORT_SYMBOL(xfrm_state_lookup_byspi); | |
968 | ||
1da177e4 LT |
969 | static void __xfrm_state_insert(struct xfrm_state *x) |
970 | { | |
98806f75 | 971 | struct net *net = xs_net(x); |
a624c108 | 972 | unsigned int h; |
1da177e4 | 973 | |
98806f75 | 974 | list_add(&x->km.all, &net->xfrm.state_all); |
4c563f76 | 975 | |
98806f75 | 976 | h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr, |
c1969f29 | 977 | x->props.reqid, x->props.family); |
ae3fb6d3 | 978 | hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h); |
1da177e4 | 979 | |
98806f75 | 980 | h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family); |
ae3fb6d3 | 981 | hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h); |
1da177e4 | 982 | |
7b4dc360 | 983 | if (x->id.spi) { |
98806f75 | 984 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, |
6c44e6b7 MN |
985 | x->props.family); |
986 | ||
ae3fb6d3 | 987 | hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h); |
6c44e6b7 MN |
988 | } |
989 | ||
9e0d57fd | 990 | tasklet_hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL); |
a47f0ce0 DM |
991 | if (x->replay_maxage) |
992 | mod_timer(&x->rtimer, jiffies + x->replay_maxage); | |
f8cd5488 | 993 | |
98806f75 | 994 | net->xfrm.state_num++; |
f034b5d4 | 995 | |
98806f75 | 996 | xfrm_hash_grow_check(net, x->bydst.next != NULL); |
1da177e4 LT |
997 | } |
998 | ||
283bc9f3 | 999 | /* net->xfrm.xfrm_state_lock is held */ |
c7f5ea3a DM |
1000 | static void __xfrm_state_bump_genids(struct xfrm_state *xnew) |
1001 | { | |
98806f75 | 1002 | struct net *net = xs_net(xnew); |
c7f5ea3a DM |
1003 | unsigned short family = xnew->props.family; |
1004 | u32 reqid = xnew->props.reqid; | |
1005 | struct xfrm_state *x; | |
c7f5ea3a | 1006 | unsigned int h; |
3d6acfa7 | 1007 | u32 mark = xnew->mark.v & xnew->mark.m; |
c7f5ea3a | 1008 | |
98806f75 | 1009 | h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family); |
b67bfe0d | 1010 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
c7f5ea3a DM |
1011 | if (x->props.family == family && |
1012 | x->props.reqid == reqid && | |
3d6acfa7 | 1013 | (mark & x->mark.m) == x->mark.v && |
70e94e66 YH |
1014 | xfrm_addr_equal(&x->id.daddr, &xnew->id.daddr, family) && |
1015 | xfrm_addr_equal(&x->props.saddr, &xnew->props.saddr, family)) | |
34996cb9 | 1016 | x->genid++; |
c7f5ea3a DM |
1017 | } |
1018 | } | |
1019 | ||
1da177e4 LT |
1020 | void xfrm_state_insert(struct xfrm_state *x) |
1021 | { | |
283bc9f3 FD |
1022 | struct net *net = xs_net(x); |
1023 | ||
1024 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
c7f5ea3a | 1025 | __xfrm_state_bump_genids(x); |
1da177e4 | 1026 | __xfrm_state_insert(x); |
283bc9f3 | 1027 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1028 | } |
1029 | EXPORT_SYMBOL(xfrm_state_insert); | |
1030 | ||
283bc9f3 | 1031 | /* net->xfrm.xfrm_state_lock is held */ |
e473fcb4 MK |
1032 | static struct xfrm_state *__find_acq_core(struct net *net, |
1033 | const struct xfrm_mark *m, | |
a70486f0 DM |
1034 | unsigned short family, u8 mode, |
1035 | u32 reqid, u8 proto, | |
1036 | const xfrm_address_t *daddr, | |
e473fcb4 MK |
1037 | const xfrm_address_t *saddr, |
1038 | int create) | |
2770834c | 1039 | { |
5447c5e4 | 1040 | unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family); |
2770834c | 1041 | struct xfrm_state *x; |
3d6acfa7 | 1042 | u32 mark = m->v & m->m; |
2770834c | 1043 | |
b67bfe0d | 1044 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
2770834c DM |
1045 | if (x->props.reqid != reqid || |
1046 | x->props.mode != mode || | |
1047 | x->props.family != family || | |
1048 | x->km.state != XFRM_STATE_ACQ || | |
75e252d9 | 1049 | x->id.spi != 0 || |
1802571b | 1050 | x->id.proto != proto || |
3d6acfa7 | 1051 | (mark & x->mark.m) != x->mark.v || |
70e94e66 YH |
1052 | !xfrm_addr_equal(&x->id.daddr, daddr, family) || |
1053 | !xfrm_addr_equal(&x->props.saddr, saddr, family)) | |
2770834c DM |
1054 | continue; |
1055 | ||
2770834c DM |
1056 | xfrm_state_hold(x); |
1057 | return x; | |
1058 | } | |
1059 | ||
1060 | if (!create) | |
1061 | return NULL; | |
1062 | ||
5447c5e4 | 1063 | x = xfrm_state_alloc(net); |
2770834c DM |
1064 | if (likely(x)) { |
1065 | switch (family) { | |
1066 | case AF_INET: | |
1067 | x->sel.daddr.a4 = daddr->a4; | |
1068 | x->sel.saddr.a4 = saddr->a4; | |
1069 | x->sel.prefixlen_d = 32; | |
1070 | x->sel.prefixlen_s = 32; | |
1071 | x->props.saddr.a4 = saddr->a4; | |
1072 | x->id.daddr.a4 = daddr->a4; | |
1073 | break; | |
1074 | ||
1075 | case AF_INET6: | |
15e318bd JB |
1076 | x->sel.daddr.in6 = daddr->in6; |
1077 | x->sel.saddr.in6 = saddr->in6; | |
2770834c DM |
1078 | x->sel.prefixlen_d = 128; |
1079 | x->sel.prefixlen_s = 128; | |
15e318bd JB |
1080 | x->props.saddr.in6 = saddr->in6; |
1081 | x->id.daddr.in6 = daddr->in6; | |
2770834c | 1082 | break; |
3ff50b79 | 1083 | } |
2770834c DM |
1084 | |
1085 | x->km.state = XFRM_STATE_ACQ; | |
1086 | x->id.proto = proto; | |
1087 | x->props.family = family; | |
1088 | x->props.mode = mode; | |
1089 | x->props.reqid = reqid; | |
bd55775c JHS |
1090 | x->mark.v = m->v; |
1091 | x->mark.m = m->m; | |
b27aeadb | 1092 | x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires; |
2770834c | 1093 | xfrm_state_hold(x); |
9e0d57fd | 1094 | tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL); |
5447c5e4 | 1095 | list_add(&x->km.all, &net->xfrm.state_all); |
ae3fb6d3 | 1096 | hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h); |
5447c5e4 | 1097 | h = xfrm_src_hash(net, daddr, saddr, family); |
ae3fb6d3 | 1098 | hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h); |
918049f0 | 1099 | |
5447c5e4 | 1100 | net->xfrm.state_num++; |
918049f0 | 1101 | |
5447c5e4 | 1102 | xfrm_hash_grow_check(net, x->bydst.next != NULL); |
2770834c DM |
1103 | } |
1104 | ||
1105 | return x; | |
1106 | } | |
1107 | ||
bd55775c | 1108 | static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); |
1da177e4 LT |
1109 | |
1110 | int xfrm_state_add(struct xfrm_state *x) | |
1111 | { | |
5447c5e4 | 1112 | struct net *net = xs_net(x); |
37b08e34 | 1113 | struct xfrm_state *x1, *to_put; |
1da177e4 LT |
1114 | int family; |
1115 | int err; | |
bd55775c | 1116 | u32 mark = x->mark.v & x->mark.m; |
eb2971b6 | 1117 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
1da177e4 LT |
1118 | |
1119 | family = x->props.family; | |
1da177e4 | 1120 | |
37b08e34 DM |
1121 | to_put = NULL; |
1122 | ||
283bc9f3 | 1123 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 1124 | |
edcd5821 | 1125 | x1 = __xfrm_state_locate(x, use_spi, family); |
1da177e4 | 1126 | if (x1) { |
37b08e34 | 1127 | to_put = x1; |
1da177e4 LT |
1128 | x1 = NULL; |
1129 | err = -EEXIST; | |
1130 | goto out; | |
1131 | } | |
1132 | ||
eb2971b6 | 1133 | if (use_spi && x->km.seq) { |
bd55775c | 1134 | x1 = __xfrm_find_acq_byseq(net, mark, x->km.seq); |
75e252d9 | 1135 | if (x1 && ((x1->id.proto != x->id.proto) || |
70e94e66 | 1136 | !xfrm_addr_equal(&x1->id.daddr, &x->id.daddr, family))) { |
37b08e34 | 1137 | to_put = x1; |
1da177e4 LT |
1138 | x1 = NULL; |
1139 | } | |
1140 | } | |
1141 | ||
eb2971b6 | 1142 | if (use_spi && !x1) |
bd55775c JHS |
1143 | x1 = __find_acq_core(net, &x->mark, family, x->props.mode, |
1144 | x->props.reqid, x->id.proto, | |
2770834c | 1145 | &x->id.daddr, &x->props.saddr, 0); |
1da177e4 | 1146 | |
c7f5ea3a | 1147 | __xfrm_state_bump_genids(x); |
1da177e4 LT |
1148 | __xfrm_state_insert(x); |
1149 | err = 0; | |
1150 | ||
1151 | out: | |
283bc9f3 | 1152 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1153 | |
1154 | if (x1) { | |
1155 | xfrm_state_delete(x1); | |
1156 | xfrm_state_put(x1); | |
1157 | } | |
1158 | ||
37b08e34 DM |
1159 | if (to_put) |
1160 | xfrm_state_put(to_put); | |
1161 | ||
1da177e4 LT |
1162 | return err; |
1163 | } | |
1164 | EXPORT_SYMBOL(xfrm_state_add); | |
1165 | ||
80c9abaa | 1166 | #ifdef CONFIG_XFRM_MIGRATE |
cc9ab60e | 1167 | static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig) |
80c9abaa | 1168 | { |
98806f75 | 1169 | struct net *net = xs_net(orig); |
98806f75 | 1170 | struct xfrm_state *x = xfrm_state_alloc(net); |
80c9abaa | 1171 | if (!x) |
553f9118 | 1172 | goto out; |
80c9abaa SS |
1173 | |
1174 | memcpy(&x->id, &orig->id, sizeof(x->id)); | |
1175 | memcpy(&x->sel, &orig->sel, sizeof(x->sel)); | |
1176 | memcpy(&x->lft, &orig->lft, sizeof(x->lft)); | |
1177 | x->props.mode = orig->props.mode; | |
1178 | x->props.replay_window = orig->props.replay_window; | |
1179 | x->props.reqid = orig->props.reqid; | |
1180 | x->props.family = orig->props.family; | |
1181 | x->props.saddr = orig->props.saddr; | |
1182 | ||
1183 | if (orig->aalg) { | |
4447bb33 | 1184 | x->aalg = xfrm_algo_auth_clone(orig->aalg); |
80c9abaa SS |
1185 | if (!x->aalg) |
1186 | goto error; | |
1187 | } | |
1188 | x->props.aalgo = orig->props.aalgo; | |
1189 | ||
ee5c2317 SK |
1190 | if (orig->aead) { |
1191 | x->aead = xfrm_algo_aead_clone(orig->aead); | |
1192 | if (!x->aead) | |
1193 | goto error; | |
1194 | } | |
80c9abaa SS |
1195 | if (orig->ealg) { |
1196 | x->ealg = xfrm_algo_clone(orig->ealg); | |
1197 | if (!x->ealg) | |
1198 | goto error; | |
1199 | } | |
1200 | x->props.ealgo = orig->props.ealgo; | |
1201 | ||
1202 | if (orig->calg) { | |
1203 | x->calg = xfrm_algo_clone(orig->calg); | |
1204 | if (!x->calg) | |
1205 | goto error; | |
1206 | } | |
1207 | x->props.calgo = orig->props.calgo; | |
1208 | ||
a716c119 | 1209 | if (orig->encap) { |
80c9abaa SS |
1210 | x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL); |
1211 | if (!x->encap) | |
1212 | goto error; | |
1213 | } | |
1214 | ||
1215 | if (orig->coaddr) { | |
1216 | x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr), | |
1217 | GFP_KERNEL); | |
1218 | if (!x->coaddr) | |
1219 | goto error; | |
1220 | } | |
1221 | ||
af2f464e | 1222 | if (orig->replay_esn) { |
cc9ab60e | 1223 | if (xfrm_replay_clone(x, orig)) |
af2f464e SK |
1224 | goto error; |
1225 | } | |
1226 | ||
bd55775c JHS |
1227 | memcpy(&x->mark, &orig->mark, sizeof(x->mark)); |
1228 | ||
cc9ab60e | 1229 | if (xfrm_init_state(x) < 0) |
80c9abaa SS |
1230 | goto error; |
1231 | ||
1232 | x->props.flags = orig->props.flags; | |
a947b0a9 | 1233 | x->props.extra_flags = orig->props.extra_flags; |
80c9abaa | 1234 | |
ee5c2317 SK |
1235 | x->tfcpad = orig->tfcpad; |
1236 | x->replay_maxdiff = orig->replay_maxdiff; | |
1237 | x->replay_maxage = orig->replay_maxage; | |
80c9abaa SS |
1238 | x->curlft.add_time = orig->curlft.add_time; |
1239 | x->km.state = orig->km.state; | |
1240 | x->km.seq = orig->km.seq; | |
1241 | ||
1242 | return x; | |
1243 | ||
1244 | error: | |
553f9118 HX |
1245 | xfrm_state_put(x); |
1246 | out: | |
80c9abaa SS |
1247 | return NULL; |
1248 | } | |
80c9abaa | 1249 | |
283bc9f3 | 1250 | struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net) |
80c9abaa SS |
1251 | { |
1252 | unsigned int h; | |
8c0cba22 SK |
1253 | struct xfrm_state *x = NULL; |
1254 | ||
1255 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
80c9abaa SS |
1256 | |
1257 | if (m->reqid) { | |
283bc9f3 | 1258 | h = xfrm_dst_hash(net, &m->old_daddr, &m->old_saddr, |
80c9abaa | 1259 | m->reqid, m->old_family); |
283bc9f3 | 1260 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
80c9abaa SS |
1261 | if (x->props.mode != m->mode || |
1262 | x->id.proto != m->proto) | |
1263 | continue; | |
1264 | if (m->reqid && x->props.reqid != m->reqid) | |
1265 | continue; | |
70e94e66 YH |
1266 | if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr, |
1267 | m->old_family) || | |
1268 | !xfrm_addr_equal(&x->props.saddr, &m->old_saddr, | |
1269 | m->old_family)) | |
80c9abaa SS |
1270 | continue; |
1271 | xfrm_state_hold(x); | |
8c0cba22 | 1272 | break; |
80c9abaa SS |
1273 | } |
1274 | } else { | |
283bc9f3 | 1275 | h = xfrm_src_hash(net, &m->old_daddr, &m->old_saddr, |
80c9abaa | 1276 | m->old_family); |
283bc9f3 | 1277 | hlist_for_each_entry(x, net->xfrm.state_bysrc+h, bysrc) { |
80c9abaa SS |
1278 | if (x->props.mode != m->mode || |
1279 | x->id.proto != m->proto) | |
1280 | continue; | |
70e94e66 YH |
1281 | if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr, |
1282 | m->old_family) || | |
1283 | !xfrm_addr_equal(&x->props.saddr, &m->old_saddr, | |
1284 | m->old_family)) | |
80c9abaa SS |
1285 | continue; |
1286 | xfrm_state_hold(x); | |
8c0cba22 | 1287 | break; |
80c9abaa SS |
1288 | } |
1289 | } | |
1290 | ||
8c0cba22 SK |
1291 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1292 | ||
1293 | return x; | |
80c9abaa SS |
1294 | } |
1295 | EXPORT_SYMBOL(xfrm_migrate_state_find); | |
1296 | ||
3e94c2dc WC |
1297 | struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, |
1298 | struct xfrm_migrate *m) | |
80c9abaa SS |
1299 | { |
1300 | struct xfrm_state *xc; | |
80c9abaa | 1301 | |
cc9ab60e | 1302 | xc = xfrm_state_clone(x); |
80c9abaa SS |
1303 | if (!xc) |
1304 | return NULL; | |
1305 | ||
1306 | memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr)); | |
1307 | memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr)); | |
1308 | ||
1309 | /* add state */ | |
70e94e66 | 1310 | if (xfrm_addr_equal(&x->id.daddr, &m->new_daddr, m->new_family)) { |
80c9abaa SS |
1311 | /* a care is needed when the destination address of the |
1312 | state is to be updated as it is a part of triplet */ | |
1313 | xfrm_state_insert(xc); | |
1314 | } else { | |
cc9ab60e | 1315 | if (xfrm_state_add(xc) < 0) |
80c9abaa SS |
1316 | goto error; |
1317 | } | |
1318 | ||
1319 | return xc; | |
1320 | error: | |
78347c8c | 1321 | xfrm_state_put(xc); |
80c9abaa SS |
1322 | return NULL; |
1323 | } | |
1324 | EXPORT_SYMBOL(xfrm_state_migrate); | |
1325 | #endif | |
1326 | ||
1da177e4 LT |
1327 | int xfrm_state_update(struct xfrm_state *x) |
1328 | { | |
37b08e34 | 1329 | struct xfrm_state *x1, *to_put; |
1da177e4 | 1330 | int err; |
eb2971b6 | 1331 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
283bc9f3 | 1332 | struct net *net = xs_net(x); |
1da177e4 | 1333 | |
37b08e34 DM |
1334 | to_put = NULL; |
1335 | ||
283bc9f3 | 1336 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
edcd5821 | 1337 | x1 = __xfrm_state_locate(x, use_spi, x->props.family); |
1da177e4 LT |
1338 | |
1339 | err = -ESRCH; | |
1340 | if (!x1) | |
1341 | goto out; | |
1342 | ||
1343 | if (xfrm_state_kern(x1)) { | |
37b08e34 | 1344 | to_put = x1; |
1da177e4 LT |
1345 | err = -EEXIST; |
1346 | goto out; | |
1347 | } | |
1348 | ||
1349 | if (x1->km.state == XFRM_STATE_ACQ) { | |
1350 | __xfrm_state_insert(x); | |
1351 | x = NULL; | |
1352 | } | |
1353 | err = 0; | |
1354 | ||
1355 | out: | |
283bc9f3 | 1356 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 1357 | |
37b08e34 DM |
1358 | if (to_put) |
1359 | xfrm_state_put(to_put); | |
1360 | ||
1da177e4 LT |
1361 | if (err) |
1362 | return err; | |
1363 | ||
1364 | if (!x) { | |
1365 | xfrm_state_delete(x1); | |
1366 | xfrm_state_put(x1); | |
1367 | return 0; | |
1368 | } | |
1369 | ||
1370 | err = -EINVAL; | |
1371 | spin_lock_bh(&x1->lock); | |
1372 | if (likely(x1->km.state == XFRM_STATE_VALID)) { | |
1373 | if (x->encap && x1->encap) | |
1374 | memcpy(x1->encap, x->encap, sizeof(*x1->encap)); | |
060f02a3 NT |
1375 | if (x->coaddr && x1->coaddr) { |
1376 | memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr)); | |
1377 | } | |
1378 | if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel))) | |
1379 | memcpy(&x1->sel, &x->sel, sizeof(x1->sel)); | |
1da177e4 LT |
1380 | memcpy(&x1->lft, &x->lft, sizeof(x1->lft)); |
1381 | x1->km.dying = 0; | |
1382 | ||
9e0d57fd | 1383 | tasklet_hrtimer_start(&x1->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL); |
1da177e4 LT |
1384 | if (x1->curlft.use_time) |
1385 | xfrm_state_check_expire(x1); | |
1386 | ||
1387 | err = 0; | |
8fcbc637 TG |
1388 | x->km.state = XFRM_STATE_DEAD; |
1389 | __xfrm_state_put(x); | |
1da177e4 LT |
1390 | } |
1391 | spin_unlock_bh(&x1->lock); | |
1392 | ||
1393 | xfrm_state_put(x1); | |
1394 | ||
1395 | return err; | |
1396 | } | |
1397 | EXPORT_SYMBOL(xfrm_state_update); | |
1398 | ||
1399 | int xfrm_state_check_expire(struct xfrm_state *x) | |
1400 | { | |
1401 | if (!x->curlft.use_time) | |
9d729f72 | 1402 | x->curlft.use_time = get_seconds(); |
1da177e4 | 1403 | |
1da177e4 LT |
1404 | if (x->curlft.bytes >= x->lft.hard_byte_limit || |
1405 | x->curlft.packets >= x->lft.hard_packet_limit) { | |
4666faab | 1406 | x->km.state = XFRM_STATE_EXPIRED; |
8b0e1953 | 1407 | tasklet_hrtimer_start(&x->mtimer, 0, HRTIMER_MODE_REL); |
1da177e4 LT |
1408 | return -EINVAL; |
1409 | } | |
1410 | ||
1411 | if (!x->km.dying && | |
1412 | (x->curlft.bytes >= x->lft.soft_byte_limit || | |
4666faab HX |
1413 | x->curlft.packets >= x->lft.soft_packet_limit)) { |
1414 | x->km.dying = 1; | |
53bc6b4d | 1415 | km_state_expired(x, 0, 0); |
4666faab | 1416 | } |
1da177e4 LT |
1417 | return 0; |
1418 | } | |
1419 | EXPORT_SYMBOL(xfrm_state_check_expire); | |
1420 | ||
1da177e4 | 1421 | struct xfrm_state * |
a70486f0 | 1422 | xfrm_state_lookup(struct net *net, u32 mark, const xfrm_address_t *daddr, __be32 spi, |
bd55775c | 1423 | u8 proto, unsigned short family) |
1da177e4 LT |
1424 | { |
1425 | struct xfrm_state *x; | |
1da177e4 | 1426 | |
c2f672fc | 1427 | rcu_read_lock(); |
bd55775c | 1428 | x = __xfrm_state_lookup(net, mark, daddr, spi, proto, family); |
c2f672fc | 1429 | rcu_read_unlock(); |
1da177e4 LT |
1430 | return x; |
1431 | } | |
1432 | EXPORT_SYMBOL(xfrm_state_lookup); | |
1433 | ||
1434 | struct xfrm_state * | |
bd55775c | 1435 | xfrm_state_lookup_byaddr(struct net *net, u32 mark, |
a70486f0 | 1436 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
eb2971b6 MN |
1437 | u8 proto, unsigned short family) |
1438 | { | |
1439 | struct xfrm_state *x; | |
eb2971b6 | 1440 | |
283bc9f3 | 1441 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1442 | x = __xfrm_state_lookup_byaddr(net, mark, daddr, saddr, proto, family); |
283bc9f3 | 1443 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
eb2971b6 MN |
1444 | return x; |
1445 | } | |
1446 | EXPORT_SYMBOL(xfrm_state_lookup_byaddr); | |
1447 | ||
1448 | struct xfrm_state * | |
e473fcb4 MK |
1449 | xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, u8 mode, u32 reqid, |
1450 | u8 proto, const xfrm_address_t *daddr, | |
1451 | const xfrm_address_t *saddr, int create, unsigned short family) | |
1da177e4 LT |
1452 | { |
1453 | struct xfrm_state *x; | |
1da177e4 | 1454 | |
283bc9f3 | 1455 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1456 | x = __find_acq_core(net, mark, family, mode, reqid, proto, daddr, saddr, create); |
283bc9f3 | 1457 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
2770834c | 1458 | |
1da177e4 LT |
1459 | return x; |
1460 | } | |
1461 | EXPORT_SYMBOL(xfrm_find_acq); | |
1462 | ||
41a49cc3 MN |
1463 | #ifdef CONFIG_XFRM_SUB_POLICY |
1464 | int | |
1465 | xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, | |
283bc9f3 | 1466 | unsigned short family, struct net *net) |
41a49cc3 MN |
1467 | { |
1468 | int err = 0; | |
1469 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
1470 | if (!afinfo) | |
1471 | return -EAFNOSUPPORT; | |
1472 | ||
283bc9f3 | 1473 | spin_lock_bh(&net->xfrm.xfrm_state_lock); /*FIXME*/ |
41a49cc3 MN |
1474 | if (afinfo->tmpl_sort) |
1475 | err = afinfo->tmpl_sort(dst, src, n); | |
283bc9f3 | 1476 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
af5d27c4 | 1477 | rcu_read_unlock(); |
41a49cc3 MN |
1478 | return err; |
1479 | } | |
1480 | EXPORT_SYMBOL(xfrm_tmpl_sort); | |
1481 | ||
1482 | int | |
1483 | xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, | |
1484 | unsigned short family) | |
1485 | { | |
1486 | int err = 0; | |
1487 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
35ea790d | 1488 | struct net *net = xs_net(*src); |
283bc9f3 | 1489 | |
41a49cc3 MN |
1490 | if (!afinfo) |
1491 | return -EAFNOSUPPORT; | |
1492 | ||
283bc9f3 | 1493 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
41a49cc3 MN |
1494 | if (afinfo->state_sort) |
1495 | err = afinfo->state_sort(dst, src, n); | |
283bc9f3 | 1496 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
af5d27c4 | 1497 | rcu_read_unlock(); |
41a49cc3 MN |
1498 | return err; |
1499 | } | |
1500 | EXPORT_SYMBOL(xfrm_state_sort); | |
1501 | #endif | |
1502 | ||
1da177e4 LT |
1503 | /* Silly enough, but I'm lazy to build resolution list */ |
1504 | ||
bd55775c | 1505 | static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq) |
1da177e4 LT |
1506 | { |
1507 | int i; | |
1da177e4 | 1508 | |
5447c5e4 | 1509 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
8f126e37 DM |
1510 | struct xfrm_state *x; |
1511 | ||
b67bfe0d | 1512 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
8f126e37 | 1513 | if (x->km.seq == seq && |
3d6acfa7 | 1514 | (mark & x->mark.m) == x->mark.v && |
8f126e37 | 1515 | x->km.state == XFRM_STATE_ACQ) { |
1da177e4 LT |
1516 | xfrm_state_hold(x); |
1517 | return x; | |
1518 | } | |
1519 | } | |
1520 | } | |
1521 | return NULL; | |
1522 | } | |
1523 | ||
bd55775c | 1524 | struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq) |
1da177e4 LT |
1525 | { |
1526 | struct xfrm_state *x; | |
1527 | ||
283bc9f3 | 1528 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1529 | x = __xfrm_find_acq_byseq(net, mark, seq); |
283bc9f3 | 1530 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1531 | return x; |
1532 | } | |
1533 | EXPORT_SYMBOL(xfrm_find_acq_byseq); | |
1534 | ||
1535 | u32 xfrm_get_acqseq(void) | |
1536 | { | |
1537 | u32 res; | |
6836b9bd | 1538 | static atomic_t acqseq; |
1539 | ||
1540 | do { | |
1541 | res = atomic_inc_return(&acqseq); | |
1542 | } while (!res); | |
1da177e4 | 1543 | |
1da177e4 LT |
1544 | return res; |
1545 | } | |
1546 | EXPORT_SYMBOL(xfrm_get_acqseq); | |
1547 | ||
776e9dd9 FD |
1548 | int verify_spi_info(u8 proto, u32 min, u32 max) |
1549 | { | |
1550 | switch (proto) { | |
1551 | case IPPROTO_AH: | |
1552 | case IPPROTO_ESP: | |
1553 | break; | |
1554 | ||
1555 | case IPPROTO_COMP: | |
1556 | /* IPCOMP spi is 16-bits. */ | |
1557 | if (max >= 0x10000) | |
1558 | return -EINVAL; | |
1559 | break; | |
1560 | ||
1561 | default: | |
1562 | return -EINVAL; | |
1563 | } | |
1564 | ||
1565 | if (min > max) | |
1566 | return -EINVAL; | |
1567 | ||
1568 | return 0; | |
1569 | } | |
1570 | EXPORT_SYMBOL(verify_spi_info); | |
1571 | ||
658b219e | 1572 | int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high) |
1da177e4 | 1573 | { |
221df1ed | 1574 | struct net *net = xs_net(x); |
f034b5d4 | 1575 | unsigned int h; |
1da177e4 | 1576 | struct xfrm_state *x0; |
658b219e HX |
1577 | int err = -ENOENT; |
1578 | __be32 minspi = htonl(low); | |
1579 | __be32 maxspi = htonl(high); | |
bd55775c | 1580 | u32 mark = x->mark.v & x->mark.m; |
1da177e4 | 1581 | |
658b219e HX |
1582 | spin_lock_bh(&x->lock); |
1583 | if (x->km.state == XFRM_STATE_DEAD) | |
1584 | goto unlock; | |
1585 | ||
1586 | err = 0; | |
1da177e4 | 1587 | if (x->id.spi) |
658b219e HX |
1588 | goto unlock; |
1589 | ||
1590 | err = -ENOENT; | |
1da177e4 LT |
1591 | |
1592 | if (minspi == maxspi) { | |
bd55775c | 1593 | x0 = xfrm_state_lookup(net, mark, &x->id.daddr, minspi, x->id.proto, x->props.family); |
1da177e4 LT |
1594 | if (x0) { |
1595 | xfrm_state_put(x0); | |
658b219e | 1596 | goto unlock; |
1da177e4 LT |
1597 | } |
1598 | x->id.spi = minspi; | |
1599 | } else { | |
1600 | u32 spi = 0; | |
9b7a787d | 1601 | for (h = 0; h < high-low+1; h++) { |
63862b5b | 1602 | spi = low + prandom_u32()%(high-low+1); |
bd55775c | 1603 | x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family); |
1da177e4 LT |
1604 | if (x0 == NULL) { |
1605 | x->id.spi = htonl(spi); | |
1606 | break; | |
1607 | } | |
1608 | xfrm_state_put(x0); | |
1609 | } | |
1610 | } | |
1611 | if (x->id.spi) { | |
283bc9f3 | 1612 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12604d8a | 1613 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family); |
ae3fb6d3 | 1614 | hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h); |
283bc9f3 | 1615 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
658b219e HX |
1616 | |
1617 | err = 0; | |
1da177e4 | 1618 | } |
658b219e HX |
1619 | |
1620 | unlock: | |
1621 | spin_unlock_bh(&x->lock); | |
1622 | ||
1623 | return err; | |
1da177e4 LT |
1624 | } |
1625 | EXPORT_SYMBOL(xfrm_alloc_spi); | |
1626 | ||
d3623099 | 1627 | static bool __xfrm_state_filter_match(struct xfrm_state *x, |
870a2df4 | 1628 | struct xfrm_address_filter *filter) |
d3623099 ND |
1629 | { |
1630 | if (filter) { | |
1631 | if ((filter->family == AF_INET || | |
1632 | filter->family == AF_INET6) && | |
1633 | x->props.family != filter->family) | |
1634 | return false; | |
1635 | ||
1636 | return addr_match(&x->props.saddr, &filter->saddr, | |
1637 | filter->splen) && | |
1638 | addr_match(&x->id.daddr, &filter->daddr, | |
1639 | filter->dplen); | |
1640 | } | |
1641 | return true; | |
1642 | } | |
1643 | ||
284fa7da | 1644 | int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, |
4c563f76 | 1645 | int (*func)(struct xfrm_state *, int, void*), |
1da177e4 LT |
1646 | void *data) |
1647 | { | |
12a169e7 HX |
1648 | struct xfrm_state *state; |
1649 | struct xfrm_state_walk *x; | |
1da177e4 LT |
1650 | int err = 0; |
1651 | ||
12a169e7 | 1652 | if (walk->seq != 0 && list_empty(&walk->all)) |
4c563f76 TT |
1653 | return 0; |
1654 | ||
283bc9f3 | 1655 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12a169e7 | 1656 | if (list_empty(&walk->all)) |
284fa7da | 1657 | x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all); |
12a169e7 | 1658 | else |
80077702 | 1659 | x = list_first_entry(&walk->all, struct xfrm_state_walk, all); |
284fa7da | 1660 | list_for_each_entry_from(x, &net->xfrm.state_all, all) { |
12a169e7 | 1661 | if (x->state == XFRM_STATE_DEAD) |
4c563f76 | 1662 | continue; |
12a169e7 HX |
1663 | state = container_of(x, struct xfrm_state, km); |
1664 | if (!xfrm_id_proto_match(state->id.proto, walk->proto)) | |
4c563f76 | 1665 | continue; |
d3623099 ND |
1666 | if (!__xfrm_state_filter_match(state, walk->filter)) |
1667 | continue; | |
12a169e7 HX |
1668 | err = func(state, walk->seq, data); |
1669 | if (err) { | |
1670 | list_move_tail(&walk->all, &x->all); | |
1671 | goto out; | |
1da177e4 | 1672 | } |
12a169e7 | 1673 | walk->seq++; |
1da177e4 | 1674 | } |
12a169e7 | 1675 | if (walk->seq == 0) { |
1da177e4 LT |
1676 | err = -ENOENT; |
1677 | goto out; | |
1678 | } | |
12a169e7 | 1679 | list_del_init(&walk->all); |
1da177e4 | 1680 | out: |
283bc9f3 | 1681 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1682 | return err; |
1683 | } | |
1684 | EXPORT_SYMBOL(xfrm_state_walk); | |
1685 | ||
d3623099 | 1686 | void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto, |
870a2df4 | 1687 | struct xfrm_address_filter *filter) |
5c182458 | 1688 | { |
12a169e7 | 1689 | INIT_LIST_HEAD(&walk->all); |
5c182458 | 1690 | walk->proto = proto; |
12a169e7 HX |
1691 | walk->state = XFRM_STATE_DEAD; |
1692 | walk->seq = 0; | |
d3623099 | 1693 | walk->filter = filter; |
5c182458 HX |
1694 | } |
1695 | EXPORT_SYMBOL(xfrm_state_walk_init); | |
1696 | ||
283bc9f3 | 1697 | void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net) |
abb81c4f | 1698 | { |
d3623099 ND |
1699 | kfree(walk->filter); |
1700 | ||
12a169e7 | 1701 | if (list_empty(&walk->all)) |
5c182458 | 1702 | return; |
5c182458 | 1703 | |
283bc9f3 | 1704 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12a169e7 | 1705 | list_del(&walk->all); |
283bc9f3 | 1706 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
abb81c4f HX |
1707 | } |
1708 | EXPORT_SYMBOL(xfrm_state_walk_done); | |
1709 | ||
f8cd5488 JHS |
1710 | static void xfrm_replay_timer_handler(unsigned long data) |
1711 | { | |
3e94c2dc | 1712 | struct xfrm_state *x = (struct xfrm_state *)data; |
f8cd5488 JHS |
1713 | |
1714 | spin_lock(&x->lock); | |
1715 | ||
2717096a | 1716 | if (x->km.state == XFRM_STATE_VALID) { |
a6483b79 | 1717 | if (xfrm_aevent_is_on(xs_net(x))) |
9fdc4883 | 1718 | x->repl->notify(x, XFRM_REPLAY_TIMEOUT); |
2717096a JHS |
1719 | else |
1720 | x->xflags |= XFRM_TIME_DEFER; | |
1721 | } | |
f8cd5488 JHS |
1722 | |
1723 | spin_unlock(&x->lock); | |
1724 | } | |
1725 | ||
df01812e | 1726 | static LIST_HEAD(xfrm_km_list); |
1da177e4 | 1727 | |
214e005b | 1728 | void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
1da177e4 LT |
1729 | { |
1730 | struct xfrm_mgr *km; | |
1731 | ||
85168c00 CW |
1732 | rcu_read_lock(); |
1733 | list_for_each_entry_rcu(km, &xfrm_km_list, list) | |
26b15dad JHS |
1734 | if (km->notify_policy) |
1735 | km->notify_policy(xp, dir, c); | |
85168c00 | 1736 | rcu_read_unlock(); |
26b15dad | 1737 | } |
1da177e4 | 1738 | |
214e005b | 1739 | void km_state_notify(struct xfrm_state *x, const struct km_event *c) |
26b15dad JHS |
1740 | { |
1741 | struct xfrm_mgr *km; | |
85168c00 CW |
1742 | rcu_read_lock(); |
1743 | list_for_each_entry_rcu(km, &xfrm_km_list, list) | |
26b15dad JHS |
1744 | if (km->notify) |
1745 | km->notify(x, c); | |
85168c00 | 1746 | rcu_read_unlock(); |
26b15dad JHS |
1747 | } |
1748 | ||
1749 | EXPORT_SYMBOL(km_policy_notify); | |
1750 | EXPORT_SYMBOL(km_state_notify); | |
1751 | ||
15e47304 | 1752 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid) |
26b15dad JHS |
1753 | { |
1754 | struct km_event c; | |
1755 | ||
bf08867f | 1756 | c.data.hard = hard; |
15e47304 | 1757 | c.portid = portid; |
f60f6b8f | 1758 | c.event = XFRM_MSG_EXPIRE; |
26b15dad | 1759 | km_state_notify(x, &c); |
1da177e4 LT |
1760 | } |
1761 | ||
53bc6b4d | 1762 | EXPORT_SYMBOL(km_state_expired); |
26b15dad JHS |
1763 | /* |
1764 | * We send to all registered managers regardless of failure | |
1765 | * We are happy with one success | |
1766 | */ | |
980ebd25 | 1767 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol) |
1da177e4 | 1768 | { |
26b15dad | 1769 | int err = -EINVAL, acqret; |
1da177e4 LT |
1770 | struct xfrm_mgr *km; |
1771 | ||
85168c00 CW |
1772 | rcu_read_lock(); |
1773 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
65e0736b | 1774 | acqret = km->acquire(x, t, pol); |
26b15dad JHS |
1775 | if (!acqret) |
1776 | err = acqret; | |
1da177e4 | 1777 | } |
85168c00 | 1778 | rcu_read_unlock(); |
1da177e4 LT |
1779 | return err; |
1780 | } | |
980ebd25 | 1781 | EXPORT_SYMBOL(km_query); |
1da177e4 | 1782 | |
5d36b180 | 1783 | int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) |
1da177e4 LT |
1784 | { |
1785 | int err = -EINVAL; | |
1786 | struct xfrm_mgr *km; | |
1787 | ||
85168c00 CW |
1788 | rcu_read_lock(); |
1789 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
1da177e4 LT |
1790 | if (km->new_mapping) |
1791 | err = km->new_mapping(x, ipaddr, sport); | |
1792 | if (!err) | |
1793 | break; | |
1794 | } | |
85168c00 | 1795 | rcu_read_unlock(); |
1da177e4 LT |
1796 | return err; |
1797 | } | |
1798 | EXPORT_SYMBOL(km_new_mapping); | |
1799 | ||
15e47304 | 1800 | void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid) |
1da177e4 | 1801 | { |
26b15dad | 1802 | struct km_event c; |
1da177e4 | 1803 | |
bf08867f | 1804 | c.data.hard = hard; |
15e47304 | 1805 | c.portid = portid; |
f60f6b8f | 1806 | c.event = XFRM_MSG_POLEXPIRE; |
26b15dad | 1807 | km_policy_notify(pol, dir, &c); |
1da177e4 | 1808 | } |
a70fcb0b | 1809 | EXPORT_SYMBOL(km_policy_expired); |
1da177e4 | 1810 | |
2d60abc2 | 1811 | #ifdef CONFIG_XFRM_MIGRATE |
183cad12 DM |
1812 | int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1813 | const struct xfrm_migrate *m, int num_migrate, | |
1814 | const struct xfrm_kmaddress *k) | |
80c9abaa SS |
1815 | { |
1816 | int err = -EINVAL; | |
1817 | int ret; | |
1818 | struct xfrm_mgr *km; | |
1819 | ||
85168c00 CW |
1820 | rcu_read_lock(); |
1821 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
80c9abaa | 1822 | if (km->migrate) { |
13c1d189 | 1823 | ret = km->migrate(sel, dir, type, m, num_migrate, k); |
80c9abaa SS |
1824 | if (!ret) |
1825 | err = ret; | |
1826 | } | |
1827 | } | |
85168c00 | 1828 | rcu_read_unlock(); |
80c9abaa SS |
1829 | return err; |
1830 | } | |
1831 | EXPORT_SYMBOL(km_migrate); | |
2d60abc2 | 1832 | #endif |
80c9abaa | 1833 | |
db983c11 | 1834 | int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr) |
97a64b45 MN |
1835 | { |
1836 | int err = -EINVAL; | |
1837 | int ret; | |
1838 | struct xfrm_mgr *km; | |
1839 | ||
85168c00 CW |
1840 | rcu_read_lock(); |
1841 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
97a64b45 | 1842 | if (km->report) { |
db983c11 | 1843 | ret = km->report(net, proto, sel, addr); |
97a64b45 MN |
1844 | if (!ret) |
1845 | err = ret; | |
1846 | } | |
1847 | } | |
85168c00 | 1848 | rcu_read_unlock(); |
97a64b45 MN |
1849 | return err; |
1850 | } | |
1851 | EXPORT_SYMBOL(km_report); | |
1852 | ||
0f24558e HG |
1853 | bool km_is_alive(const struct km_event *c) |
1854 | { | |
1855 | struct xfrm_mgr *km; | |
1856 | bool is_alive = false; | |
1857 | ||
1858 | rcu_read_lock(); | |
1859 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
1860 | if (km->is_alive && km->is_alive(c)) { | |
1861 | is_alive = true; | |
1862 | break; | |
1863 | } | |
1864 | } | |
1865 | rcu_read_unlock(); | |
1866 | ||
1867 | return is_alive; | |
1868 | } | |
1869 | EXPORT_SYMBOL(km_is_alive); | |
1870 | ||
1da177e4 LT |
1871 | int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) |
1872 | { | |
1873 | int err; | |
1874 | u8 *data; | |
1875 | struct xfrm_mgr *km; | |
1876 | struct xfrm_policy *pol = NULL; | |
1877 | ||
1878 | if (optlen <= 0 || optlen > PAGE_SIZE) | |
1879 | return -EMSGSIZE; | |
1880 | ||
1881 | data = kmalloc(optlen, GFP_KERNEL); | |
1882 | if (!data) | |
1883 | return -ENOMEM; | |
1884 | ||
1885 | err = -EFAULT; | |
1886 | if (copy_from_user(data, optval, optlen)) | |
1887 | goto out; | |
1888 | ||
1889 | err = -EINVAL; | |
85168c00 CW |
1890 | rcu_read_lock(); |
1891 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
cb969f07 | 1892 | pol = km->compile_policy(sk, optname, data, |
1da177e4 LT |
1893 | optlen, &err); |
1894 | if (err >= 0) | |
1895 | break; | |
1896 | } | |
85168c00 | 1897 | rcu_read_unlock(); |
1da177e4 LT |
1898 | |
1899 | if (err >= 0) { | |
1900 | xfrm_sk_policy_insert(sk, err, pol); | |
1901 | xfrm_pol_put(pol); | |
1902 | err = 0; | |
1903 | } | |
1904 | ||
1905 | out: | |
1906 | kfree(data); | |
1907 | return err; | |
1908 | } | |
1909 | EXPORT_SYMBOL(xfrm_user_policy); | |
1910 | ||
85168c00 CW |
1911 | static DEFINE_SPINLOCK(xfrm_km_lock); |
1912 | ||
1da177e4 LT |
1913 | int xfrm_register_km(struct xfrm_mgr *km) |
1914 | { | |
85168c00 CW |
1915 | spin_lock_bh(&xfrm_km_lock); |
1916 | list_add_tail_rcu(&km->list, &xfrm_km_list); | |
1917 | spin_unlock_bh(&xfrm_km_lock); | |
1da177e4 LT |
1918 | return 0; |
1919 | } | |
1920 | EXPORT_SYMBOL(xfrm_register_km); | |
1921 | ||
1922 | int xfrm_unregister_km(struct xfrm_mgr *km) | |
1923 | { | |
85168c00 CW |
1924 | spin_lock_bh(&xfrm_km_lock); |
1925 | list_del_rcu(&km->list); | |
1926 | spin_unlock_bh(&xfrm_km_lock); | |
1927 | synchronize_rcu(); | |
1da177e4 LT |
1928 | return 0; |
1929 | } | |
1930 | EXPORT_SYMBOL(xfrm_unregister_km); | |
1931 | ||
1932 | int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo) | |
1933 | { | |
1934 | int err = 0; | |
423826a7 FW |
1935 | |
1936 | if (WARN_ON(afinfo->family >= NPROTO)) | |
1da177e4 | 1937 | return -EAFNOSUPPORT; |
423826a7 | 1938 | |
44abdc30 | 1939 | spin_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 | 1940 | if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL)) |
f31e8d4f | 1941 | err = -EEXIST; |
edcd5821 | 1942 | else |
44abdc30 CW |
1943 | rcu_assign_pointer(xfrm_state_afinfo[afinfo->family], afinfo); |
1944 | spin_unlock_bh(&xfrm_state_afinfo_lock); | |
1da177e4 LT |
1945 | return err; |
1946 | } | |
1947 | EXPORT_SYMBOL(xfrm_state_register_afinfo); | |
1948 | ||
1949 | int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo) | |
1950 | { | |
423826a7 FW |
1951 | int err = 0, family = afinfo->family; |
1952 | ||
1953 | if (WARN_ON(family >= NPROTO)) | |
1da177e4 | 1954 | return -EAFNOSUPPORT; |
423826a7 | 1955 | |
44abdc30 | 1956 | spin_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 | 1957 | if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) { |
423826a7 | 1958 | if (rcu_access_pointer(xfrm_state_afinfo[family]) != afinfo) |
1da177e4 | 1959 | err = -EINVAL; |
edcd5821 | 1960 | else |
44abdc30 | 1961 | RCU_INIT_POINTER(xfrm_state_afinfo[afinfo->family], NULL); |
1da177e4 | 1962 | } |
44abdc30 CW |
1963 | spin_unlock_bh(&xfrm_state_afinfo_lock); |
1964 | synchronize_rcu(); | |
1da177e4 LT |
1965 | return err; |
1966 | } | |
1967 | EXPORT_SYMBOL(xfrm_state_unregister_afinfo); | |
1968 | ||
711059b9 FW |
1969 | struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family) |
1970 | { | |
1971 | if (unlikely(family >= NPROTO)) | |
1972 | return NULL; | |
1973 | ||
1974 | return rcu_dereference(xfrm_state_afinfo[family]); | |
1975 | } | |
1976 | ||
628e341f | 1977 | struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family) |
1da177e4 LT |
1978 | { |
1979 | struct xfrm_state_afinfo *afinfo; | |
1980 | if (unlikely(family >= NPROTO)) | |
1981 | return NULL; | |
44abdc30 CW |
1982 | rcu_read_lock(); |
1983 | afinfo = rcu_dereference(xfrm_state_afinfo[family]); | |
546be240 | 1984 | if (unlikely(!afinfo)) |
44abdc30 | 1985 | rcu_read_unlock(); |
1da177e4 LT |
1986 | return afinfo; |
1987 | } | |
1988 | ||
1da177e4 LT |
1989 | /* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */ |
1990 | void xfrm_state_delete_tunnel(struct xfrm_state *x) | |
1991 | { | |
1992 | if (x->tunnel) { | |
1993 | struct xfrm_state *t = x->tunnel; | |
1994 | ||
1995 | if (atomic_read(&t->tunnel_users) == 2) | |
1996 | xfrm_state_delete(t); | |
1997 | atomic_dec(&t->tunnel_users); | |
1998 | xfrm_state_put(t); | |
1999 | x->tunnel = NULL; | |
2000 | } | |
2001 | } | |
2002 | EXPORT_SYMBOL(xfrm_state_delete_tunnel); | |
2003 | ||
2004 | int xfrm_state_mtu(struct xfrm_state *x, int mtu) | |
2005 | { | |
b3b73b8e | 2006 | const struct xfrm_type *type = READ_ONCE(x->type); |
1da177e4 | 2007 | |
c5c25238 | 2008 | if (x->km.state == XFRM_STATE_VALID && |
b3b73b8e FW |
2009 | type && type->get_mtu) |
2010 | return type->get_mtu(x, mtu); | |
2011 | ||
2012 | return mtu - x->props.header_len; | |
1da177e4 LT |
2013 | } |
2014 | ||
a454f0cc | 2015 | int __xfrm_init_state(struct xfrm_state *x, bool init_replay) |
72cb6962 | 2016 | { |
d094cd83 | 2017 | struct xfrm_state_afinfo *afinfo; |
df9dcb45 | 2018 | struct xfrm_mode *inner_mode; |
d094cd83 | 2019 | int family = x->props.family; |
72cb6962 HX |
2020 | int err; |
2021 | ||
d094cd83 HX |
2022 | err = -EAFNOSUPPORT; |
2023 | afinfo = xfrm_state_get_afinfo(family); | |
2024 | if (!afinfo) | |
2025 | goto error; | |
2026 | ||
2027 | err = 0; | |
2028 | if (afinfo->init_flags) | |
2029 | err = afinfo->init_flags(x); | |
2030 | ||
af5d27c4 | 2031 | rcu_read_unlock(); |
d094cd83 HX |
2032 | |
2033 | if (err) | |
2034 | goto error; | |
2035 | ||
2036 | err = -EPROTONOSUPPORT; | |
13996378 | 2037 | |
df9dcb45 KM |
2038 | if (x->sel.family != AF_UNSPEC) { |
2039 | inner_mode = xfrm_get_mode(x->props.mode, x->sel.family); | |
2040 | if (inner_mode == NULL) | |
2041 | goto error; | |
2042 | ||
2043 | if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) && | |
2044 | family != x->sel.family) { | |
2045 | xfrm_put_mode(inner_mode); | |
2046 | goto error; | |
2047 | } | |
2048 | ||
2049 | x->inner_mode = inner_mode; | |
2050 | } else { | |
2051 | struct xfrm_mode *inner_mode_iaf; | |
d81d2285 | 2052 | int iafamily = AF_INET; |
df9dcb45 | 2053 | |
d81d2285 | 2054 | inner_mode = xfrm_get_mode(x->props.mode, x->props.family); |
df9dcb45 KM |
2055 | if (inner_mode == NULL) |
2056 | goto error; | |
2057 | ||
2058 | if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) { | |
2059 | xfrm_put_mode(inner_mode); | |
2060 | goto error; | |
2061 | } | |
d81d2285 | 2062 | x->inner_mode = inner_mode; |
df9dcb45 | 2063 | |
d81d2285 MW |
2064 | if (x->props.family == AF_INET) |
2065 | iafamily = AF_INET6; | |
df9dcb45 | 2066 | |
d81d2285 MW |
2067 | inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily); |
2068 | if (inner_mode_iaf) { | |
2069 | if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL) | |
2070 | x->inner_mode_iaf = inner_mode_iaf; | |
2071 | else | |
2072 | xfrm_put_mode(inner_mode_iaf); | |
df9dcb45 KM |
2073 | } |
2074 | } | |
13996378 | 2075 | |
d094cd83 | 2076 | x->type = xfrm_get_type(x->id.proto, family); |
72cb6962 HX |
2077 | if (x->type == NULL) |
2078 | goto error; | |
2079 | ||
2080 | err = x->type->init_state(x); | |
2081 | if (err) | |
2082 | goto error; | |
2083 | ||
13996378 | 2084 | x->outer_mode = xfrm_get_mode(x->props.mode, family); |
599901c3 JL |
2085 | if (x->outer_mode == NULL) { |
2086 | err = -EPROTONOSUPPORT; | |
b59f45d0 | 2087 | goto error; |
599901c3 | 2088 | } |
b59f45d0 | 2089 | |
a454f0cc WY |
2090 | if (init_replay) { |
2091 | err = xfrm_init_replay(x); | |
2092 | if (err) | |
2093 | goto error; | |
2094 | } | |
2095 | ||
72cb6962 HX |
2096 | x->km.state = XFRM_STATE_VALID; |
2097 | ||
2098 | error: | |
2099 | return err; | |
2100 | } | |
2101 | ||
a454f0cc WY |
2102 | EXPORT_SYMBOL(__xfrm_init_state); |
2103 | ||
2104 | int xfrm_init_state(struct xfrm_state *x) | |
2105 | { | |
2106 | return __xfrm_init_state(x, true); | |
2107 | } | |
2108 | ||
72cb6962 | 2109 | EXPORT_SYMBOL(xfrm_init_state); |
a716c119 | 2110 | |
d62ddc21 | 2111 | int __net_init xfrm_state_init(struct net *net) |
1da177e4 | 2112 | { |
f034b5d4 DM |
2113 | unsigned int sz; |
2114 | ||
9d4139c7 AD |
2115 | INIT_LIST_HEAD(&net->xfrm.state_all); |
2116 | ||
f034b5d4 DM |
2117 | sz = sizeof(struct hlist_head) * 8; |
2118 | ||
73d189dc AD |
2119 | net->xfrm.state_bydst = xfrm_hash_alloc(sz); |
2120 | if (!net->xfrm.state_bydst) | |
2121 | goto out_bydst; | |
d320bbb3 AD |
2122 | net->xfrm.state_bysrc = xfrm_hash_alloc(sz); |
2123 | if (!net->xfrm.state_bysrc) | |
2124 | goto out_bysrc; | |
b754a4fd AD |
2125 | net->xfrm.state_byspi = xfrm_hash_alloc(sz); |
2126 | if (!net->xfrm.state_byspi) | |
2127 | goto out_byspi; | |
529983ec | 2128 | net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1); |
1da177e4 | 2129 | |
0bf7c5b0 | 2130 | net->xfrm.state_num = 0; |
63082733 | 2131 | INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize); |
283bc9f3 | 2132 | spin_lock_init(&net->xfrm.xfrm_state_lock); |
d62ddc21 | 2133 | return 0; |
73d189dc | 2134 | |
b754a4fd AD |
2135 | out_byspi: |
2136 | xfrm_hash_free(net->xfrm.state_bysrc, sz); | |
d320bbb3 AD |
2137 | out_bysrc: |
2138 | xfrm_hash_free(net->xfrm.state_bydst, sz); | |
73d189dc AD |
2139 | out_bydst: |
2140 | return -ENOMEM; | |
d62ddc21 AD |
2141 | } |
2142 | ||
2143 | void xfrm_state_fini(struct net *net) | |
2144 | { | |
73d189dc AD |
2145 | unsigned int sz; |
2146 | ||
7c2776ee | 2147 | flush_work(&net->xfrm.state_hash_work); |
2e71029e | 2148 | xfrm_state_flush(net, IPSEC_PROTO_ANY, false); |
35db57bb | 2149 | flush_work(&xfrm_state_gc_work); |
7c2776ee | 2150 | |
9d4139c7 | 2151 | WARN_ON(!list_empty(&net->xfrm.state_all)); |
73d189dc | 2152 | |
529983ec | 2153 | sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head); |
b754a4fd AD |
2154 | WARN_ON(!hlist_empty(net->xfrm.state_byspi)); |
2155 | xfrm_hash_free(net->xfrm.state_byspi, sz); | |
d320bbb3 AD |
2156 | WARN_ON(!hlist_empty(net->xfrm.state_bysrc)); |
2157 | xfrm_hash_free(net->xfrm.state_bysrc, sz); | |
73d189dc AD |
2158 | WARN_ON(!hlist_empty(net->xfrm.state_bydst)); |
2159 | xfrm_hash_free(net->xfrm.state_bydst, sz); | |
1da177e4 LT |
2160 | } |
2161 | ||
ab5f5e8b | 2162 | #ifdef CONFIG_AUDITSYSCALL |
cf35f43e IJ |
2163 | static void xfrm_audit_helper_sainfo(struct xfrm_state *x, |
2164 | struct audit_buffer *audit_buf) | |
ab5f5e8b | 2165 | { |
68277acc PM |
2166 | struct xfrm_sec_ctx *ctx = x->security; |
2167 | u32 spi = ntohl(x->id.spi); | |
2168 | ||
2169 | if (ctx) | |
ab5f5e8b | 2170 | audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s", |
68277acc | 2171 | ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str); |
ab5f5e8b | 2172 | |
9b7a787d | 2173 | switch (x->props.family) { |
ab5f5e8b | 2174 | case AF_INET: |
21454aaa HH |
2175 | audit_log_format(audit_buf, " src=%pI4 dst=%pI4", |
2176 | &x->props.saddr.a4, &x->id.daddr.a4); | |
ab5f5e8b JL |
2177 | break; |
2178 | case AF_INET6: | |
5b095d98 | 2179 | audit_log_format(audit_buf, " src=%pI6 dst=%pI6", |
fdb46ee7 | 2180 | x->props.saddr.a6, x->id.daddr.a6); |
ab5f5e8b JL |
2181 | break; |
2182 | } | |
68277acc PM |
2183 | |
2184 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
ab5f5e8b JL |
2185 | } |
2186 | ||
cf35f43e IJ |
2187 | static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family, |
2188 | struct audit_buffer *audit_buf) | |
afeb14b4 | 2189 | { |
b71d1d42 ED |
2190 | const struct iphdr *iph4; |
2191 | const struct ipv6hdr *iph6; | |
afeb14b4 PM |
2192 | |
2193 | switch (family) { | |
2194 | case AF_INET: | |
2195 | iph4 = ip_hdr(skb); | |
21454aaa HH |
2196 | audit_log_format(audit_buf, " src=%pI4 dst=%pI4", |
2197 | &iph4->saddr, &iph4->daddr); | |
afeb14b4 PM |
2198 | break; |
2199 | case AF_INET6: | |
2200 | iph6 = ipv6_hdr(skb); | |
2201 | audit_log_format(audit_buf, | |
5b095d98 | 2202 | " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x", |
9b7a787d | 2203 | &iph6->saddr, &iph6->daddr, |
afeb14b4 PM |
2204 | iph6->flow_lbl[0] & 0x0f, |
2205 | iph6->flow_lbl[1], | |
2206 | iph6->flow_lbl[2]); | |
2207 | break; | |
2208 | } | |
2209 | } | |
2210 | ||
2e71029e | 2211 | void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid) |
ab5f5e8b JL |
2212 | { |
2213 | struct audit_buffer *audit_buf; | |
ab5f5e8b | 2214 | |
afeb14b4 | 2215 | audit_buf = xfrm_audit_start("SAD-add"); |
ab5f5e8b JL |
2216 | if (audit_buf == NULL) |
2217 | return; | |
2e71029e | 2218 | xfrm_audit_helper_usrinfo(task_valid, audit_buf); |
afeb14b4 PM |
2219 | xfrm_audit_helper_sainfo(x, audit_buf); |
2220 | audit_log_format(audit_buf, " res=%u", result); | |
ab5f5e8b JL |
2221 | audit_log_end(audit_buf); |
2222 | } | |
2223 | EXPORT_SYMBOL_GPL(xfrm_audit_state_add); | |
2224 | ||
2e71029e | 2225 | void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid) |
ab5f5e8b JL |
2226 | { |
2227 | struct audit_buffer *audit_buf; | |
ab5f5e8b | 2228 | |
afeb14b4 | 2229 | audit_buf = xfrm_audit_start("SAD-delete"); |
ab5f5e8b JL |
2230 | if (audit_buf == NULL) |
2231 | return; | |
2e71029e | 2232 | xfrm_audit_helper_usrinfo(task_valid, audit_buf); |
afeb14b4 PM |
2233 | xfrm_audit_helper_sainfo(x, audit_buf); |
2234 | audit_log_format(audit_buf, " res=%u", result); | |
ab5f5e8b JL |
2235 | audit_log_end(audit_buf); |
2236 | } | |
2237 | EXPORT_SYMBOL_GPL(xfrm_audit_state_delete); | |
afeb14b4 PM |
2238 | |
2239 | void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
2240 | struct sk_buff *skb) | |
2241 | { | |
2242 | struct audit_buffer *audit_buf; | |
2243 | u32 spi; | |
2244 | ||
2245 | audit_buf = xfrm_audit_start("SA-replay-overflow"); | |
2246 | if (audit_buf == NULL) | |
2247 | return; | |
2248 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2249 | /* don't record the sequence number because it's inherent in this kind | |
2250 | * of audit message */ | |
2251 | spi = ntohl(x->id.spi); | |
2252 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
2253 | audit_log_end(audit_buf); | |
2254 | } | |
2255 | EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow); | |
2256 | ||
9fdc4883 | 2257 | void xfrm_audit_state_replay(struct xfrm_state *x, |
afeb14b4 PM |
2258 | struct sk_buff *skb, __be32 net_seq) |
2259 | { | |
2260 | struct audit_buffer *audit_buf; | |
2261 | u32 spi; | |
2262 | ||
2263 | audit_buf = xfrm_audit_start("SA-replayed-pkt"); | |
2264 | if (audit_buf == NULL) | |
2265 | return; | |
2266 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2267 | spi = ntohl(x->id.spi); | |
2268 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2269 | spi, spi, ntohl(net_seq)); | |
2270 | audit_log_end(audit_buf); | |
2271 | } | |
9fdc4883 | 2272 | EXPORT_SYMBOL_GPL(xfrm_audit_state_replay); |
afeb14b4 PM |
2273 | |
2274 | void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family) | |
2275 | { | |
2276 | struct audit_buffer *audit_buf; | |
2277 | ||
2278 | audit_buf = xfrm_audit_start("SA-notfound"); | |
2279 | if (audit_buf == NULL) | |
2280 | return; | |
2281 | xfrm_audit_helper_pktinfo(skb, family, audit_buf); | |
2282 | audit_log_end(audit_buf); | |
2283 | } | |
2284 | EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple); | |
2285 | ||
2286 | void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
2287 | __be32 net_spi, __be32 net_seq) | |
2288 | { | |
2289 | struct audit_buffer *audit_buf; | |
2290 | u32 spi; | |
2291 | ||
2292 | audit_buf = xfrm_audit_start("SA-notfound"); | |
2293 | if (audit_buf == NULL) | |
2294 | return; | |
2295 | xfrm_audit_helper_pktinfo(skb, family, audit_buf); | |
2296 | spi = ntohl(net_spi); | |
2297 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2298 | spi, spi, ntohl(net_seq)); | |
2299 | audit_log_end(audit_buf); | |
2300 | } | |
2301 | EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound); | |
2302 | ||
2303 | void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
2304 | struct sk_buff *skb, u8 proto) | |
2305 | { | |
2306 | struct audit_buffer *audit_buf; | |
2307 | __be32 net_spi; | |
2308 | __be32 net_seq; | |
2309 | ||
2310 | audit_buf = xfrm_audit_start("SA-icv-failure"); | |
2311 | if (audit_buf == NULL) | |
2312 | return; | |
2313 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2314 | if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) { | |
2315 | u32 spi = ntohl(net_spi); | |
2316 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2317 | spi, spi, ntohl(net_seq)); | |
2318 | } | |
2319 | audit_log_end(audit_buf); | |
2320 | } | |
2321 | EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail); | |
ab5f5e8b | 2322 | #endif /* CONFIG_AUDITSYSCALL */ |