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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 | { | |
88755e9c | 51 | return refcount_inc_not_zero(&x->refcnt); |
02efdff7 FW |
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 | ||
9d389d7f SK |
254 | static DEFINE_SPINLOCK(xfrm_type_offload_lock); |
255 | int xfrm_register_type_offload(const struct xfrm_type_offload *type, | |
256 | unsigned short family) | |
257 | { | |
258 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
259 | const struct xfrm_type_offload **typemap; | |
260 | int err = 0; | |
261 | ||
262 | if (unlikely(afinfo == NULL)) | |
263 | return -EAFNOSUPPORT; | |
264 | typemap = afinfo->type_offload_map; | |
265 | spin_lock_bh(&xfrm_type_offload_lock); | |
266 | ||
267 | if (likely(typemap[type->proto] == NULL)) | |
268 | typemap[type->proto] = type; | |
269 | else | |
270 | err = -EEXIST; | |
271 | spin_unlock_bh(&xfrm_type_offload_lock); | |
272 | rcu_read_unlock(); | |
273 | return err; | |
274 | } | |
275 | EXPORT_SYMBOL(xfrm_register_type_offload); | |
276 | ||
277 | int xfrm_unregister_type_offload(const struct xfrm_type_offload *type, | |
278 | unsigned short family) | |
279 | { | |
280 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
281 | const struct xfrm_type_offload **typemap; | |
282 | int err = 0; | |
283 | ||
284 | if (unlikely(afinfo == NULL)) | |
285 | return -EAFNOSUPPORT; | |
286 | typemap = afinfo->type_offload_map; | |
287 | spin_lock_bh(&xfrm_type_offload_lock); | |
288 | ||
289 | if (unlikely(typemap[type->proto] != type)) | |
290 | err = -ENOENT; | |
291 | else | |
292 | typemap[type->proto] = NULL; | |
293 | spin_unlock_bh(&xfrm_type_offload_lock); | |
294 | rcu_read_unlock(); | |
295 | return err; | |
296 | } | |
297 | EXPORT_SYMBOL(xfrm_unregister_type_offload); | |
298 | ||
299 | static const struct xfrm_type_offload *xfrm_get_type_offload(u8 proto, unsigned short family) | |
300 | { | |
301 | struct xfrm_state_afinfo *afinfo; | |
302 | const struct xfrm_type_offload **typemap; | |
303 | const struct xfrm_type_offload *type; | |
304 | ||
305 | afinfo = xfrm_state_get_afinfo(family); | |
306 | if (unlikely(afinfo == NULL)) | |
307 | return NULL; | |
308 | typemap = afinfo->type_offload_map; | |
309 | ||
310 | type = typemap[proto]; | |
311 | if ((type && !try_module_get(type->owner))) | |
312 | type = NULL; | |
313 | ||
314 | rcu_read_unlock(); | |
315 | return type; | |
316 | } | |
317 | ||
318 | static void xfrm_put_type_offload(const struct xfrm_type_offload *type) | |
319 | { | |
320 | module_put(type->owner); | |
321 | } | |
322 | ||
7a9885b9 | 323 | static DEFINE_SPINLOCK(xfrm_mode_lock); |
aa5d62cc HX |
324 | int xfrm_register_mode(struct xfrm_mode *mode, int family) |
325 | { | |
326 | struct xfrm_state_afinfo *afinfo; | |
327 | struct xfrm_mode **modemap; | |
328 | int err; | |
329 | ||
330 | if (unlikely(mode->encap >= XFRM_MODE_MAX)) | |
331 | return -EINVAL; | |
332 | ||
7a9885b9 | 333 | afinfo = xfrm_state_get_afinfo(family); |
aa5d62cc HX |
334 | if (unlikely(afinfo == NULL)) |
335 | return -EAFNOSUPPORT; | |
336 | ||
337 | err = -EEXIST; | |
338 | modemap = afinfo->mode_map; | |
7a9885b9 | 339 | spin_lock_bh(&xfrm_mode_lock); |
17c2a42a HX |
340 | if (modemap[mode->encap]) |
341 | goto out; | |
aa5d62cc | 342 | |
17c2a42a HX |
343 | err = -ENOENT; |
344 | if (!try_module_get(afinfo->owner)) | |
345 | goto out; | |
346 | ||
347 | mode->afinfo = afinfo; | |
348 | modemap[mode->encap] = mode; | |
349 | err = 0; | |
350 | ||
351 | out: | |
7a9885b9 | 352 | spin_unlock_bh(&xfrm_mode_lock); |
af5d27c4 | 353 | rcu_read_unlock(); |
aa5d62cc HX |
354 | return err; |
355 | } | |
356 | EXPORT_SYMBOL(xfrm_register_mode); | |
357 | ||
358 | int xfrm_unregister_mode(struct xfrm_mode *mode, int family) | |
359 | { | |
360 | struct xfrm_state_afinfo *afinfo; | |
361 | struct xfrm_mode **modemap; | |
362 | int err; | |
363 | ||
364 | if (unlikely(mode->encap >= XFRM_MODE_MAX)) | |
365 | return -EINVAL; | |
366 | ||
7a9885b9 | 367 | afinfo = xfrm_state_get_afinfo(family); |
aa5d62cc HX |
368 | if (unlikely(afinfo == NULL)) |
369 | return -EAFNOSUPPORT; | |
370 | ||
371 | err = -ENOENT; | |
372 | modemap = afinfo->mode_map; | |
7a9885b9 | 373 | spin_lock_bh(&xfrm_mode_lock); |
aa5d62cc HX |
374 | if (likely(modemap[mode->encap] == mode)) { |
375 | modemap[mode->encap] = NULL; | |
17c2a42a | 376 | module_put(mode->afinfo->owner); |
aa5d62cc HX |
377 | err = 0; |
378 | } | |
379 | ||
7a9885b9 | 380 | spin_unlock_bh(&xfrm_mode_lock); |
af5d27c4 | 381 | rcu_read_unlock(); |
aa5d62cc HX |
382 | return err; |
383 | } | |
384 | EXPORT_SYMBOL(xfrm_unregister_mode); | |
385 | ||
386 | static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family) | |
387 | { | |
388 | struct xfrm_state_afinfo *afinfo; | |
389 | struct xfrm_mode *mode; | |
390 | int modload_attempted = 0; | |
391 | ||
392 | if (unlikely(encap >= XFRM_MODE_MAX)) | |
393 | return NULL; | |
394 | ||
395 | retry: | |
396 | afinfo = xfrm_state_get_afinfo(family); | |
397 | if (unlikely(afinfo == NULL)) | |
398 | return NULL; | |
399 | ||
75cda62d | 400 | mode = READ_ONCE(afinfo->mode_map[encap]); |
aa5d62cc HX |
401 | if (unlikely(mode && !try_module_get(mode->owner))) |
402 | mode = NULL; | |
75cda62d FW |
403 | |
404 | rcu_read_unlock(); | |
aa5d62cc | 405 | if (!mode && !modload_attempted) { |
aa5d62cc HX |
406 | request_module("xfrm-mode-%d-%d", family, encap); |
407 | modload_attempted = 1; | |
408 | goto retry; | |
409 | } | |
410 | ||
aa5d62cc HX |
411 | return mode; |
412 | } | |
413 | ||
414 | static void xfrm_put_mode(struct xfrm_mode *mode) | |
415 | { | |
416 | module_put(mode->owner); | |
417 | } | |
418 | ||
1da177e4 LT |
419 | static void xfrm_state_gc_destroy(struct xfrm_state *x) |
420 | { | |
9e0d57fd | 421 | tasklet_hrtimer_cancel(&x->mtimer); |
a47f0ce0 | 422 | del_timer_sync(&x->rtimer); |
b5884793 | 423 | kfree(x->aead); |
a51482bd JJ |
424 | kfree(x->aalg); |
425 | kfree(x->ealg); | |
426 | kfree(x->calg); | |
427 | kfree(x->encap); | |
060f02a3 | 428 | kfree(x->coaddr); |
d8647b79 SK |
429 | kfree(x->replay_esn); |
430 | kfree(x->preplay_esn); | |
13996378 HX |
431 | if (x->inner_mode) |
432 | xfrm_put_mode(x->inner_mode); | |
df9dcb45 KM |
433 | if (x->inner_mode_iaf) |
434 | xfrm_put_mode(x->inner_mode_iaf); | |
13996378 HX |
435 | if (x->outer_mode) |
436 | xfrm_put_mode(x->outer_mode); | |
9d389d7f SK |
437 | if (x->type_offload) |
438 | xfrm_put_type_offload(x->type_offload); | |
1da177e4 LT |
439 | if (x->type) { |
440 | x->type->destructor(x); | |
441 | xfrm_put_type(x->type); | |
442 | } | |
d77e38e6 | 443 | xfrm_dev_state_free(x); |
df71837d | 444 | security_xfrm_state_free(x); |
1da177e4 LT |
445 | kfree(x); |
446 | } | |
447 | ||
c7837144 | 448 | static void xfrm_state_gc_task(struct work_struct *work) |
1da177e4 | 449 | { |
12a169e7 | 450 | struct xfrm_state *x; |
b67bfe0d | 451 | struct hlist_node *tmp; |
12a169e7 | 452 | struct hlist_head gc_list; |
1da177e4 | 453 | |
1da177e4 | 454 | spin_lock_bh(&xfrm_state_gc_lock); |
35db57bb | 455 | hlist_move_list(&xfrm_state_gc_list, &gc_list); |
1da177e4 LT |
456 | spin_unlock_bh(&xfrm_state_gc_lock); |
457 | ||
df7274eb FW |
458 | synchronize_rcu(); |
459 | ||
b67bfe0d | 460 | hlist_for_each_entry_safe(x, tmp, &gc_list, gclist) |
1da177e4 | 461 | xfrm_state_gc_destroy(x); |
1da177e4 LT |
462 | } |
463 | ||
3e94c2dc | 464 | static enum hrtimer_restart xfrm_timer_handler(struct hrtimer *me) |
1da177e4 | 465 | { |
9e0d57fd YP |
466 | struct tasklet_hrtimer *thr = container_of(me, struct tasklet_hrtimer, timer); |
467 | struct xfrm_state *x = container_of(thr, struct xfrm_state, mtimer); | |
9d729f72 | 468 | unsigned long now = get_seconds(); |
1da177e4 LT |
469 | long next = LONG_MAX; |
470 | int warn = 0; | |
161a09e7 | 471 | int err = 0; |
1da177e4 LT |
472 | |
473 | spin_lock(&x->lock); | |
474 | if (x->km.state == XFRM_STATE_DEAD) | |
475 | goto out; | |
476 | if (x->km.state == XFRM_STATE_EXPIRED) | |
477 | goto expired; | |
478 | if (x->lft.hard_add_expires_seconds) { | |
479 | long tmo = x->lft.hard_add_expires_seconds + | |
480 | x->curlft.add_time - now; | |
e3c0d047 FD |
481 | if (tmo <= 0) { |
482 | if (x->xflags & XFRM_SOFT_EXPIRE) { | |
483 | /* enter hard expire without soft expire first?! | |
484 | * setting a new date could trigger this. | |
1365e547 | 485 | * workaround: fix x->curflt.add_time by below: |
e3c0d047 FD |
486 | */ |
487 | x->curlft.add_time = now - x->saved_tmo - 1; | |
488 | tmo = x->lft.hard_add_expires_seconds - x->saved_tmo; | |
489 | } else | |
490 | goto expired; | |
491 | } | |
1da177e4 LT |
492 | if (tmo < next) |
493 | next = tmo; | |
494 | } | |
495 | if (x->lft.hard_use_expires_seconds) { | |
496 | long tmo = x->lft.hard_use_expires_seconds + | |
497 | (x->curlft.use_time ? : now) - now; | |
498 | if (tmo <= 0) | |
499 | goto expired; | |
500 | if (tmo < next) | |
501 | next = tmo; | |
502 | } | |
503 | if (x->km.dying) | |
504 | goto resched; | |
505 | if (x->lft.soft_add_expires_seconds) { | |
506 | long tmo = x->lft.soft_add_expires_seconds + | |
507 | x->curlft.add_time - now; | |
e3c0d047 | 508 | if (tmo <= 0) { |
1da177e4 | 509 | warn = 1; |
e3c0d047 FD |
510 | x->xflags &= ~XFRM_SOFT_EXPIRE; |
511 | } else if (tmo < next) { | |
1da177e4 | 512 | next = tmo; |
e3c0d047 FD |
513 | x->xflags |= XFRM_SOFT_EXPIRE; |
514 | x->saved_tmo = tmo; | |
515 | } | |
1da177e4 LT |
516 | } |
517 | if (x->lft.soft_use_expires_seconds) { | |
518 | long tmo = x->lft.soft_use_expires_seconds + | |
519 | (x->curlft.use_time ? : now) - now; | |
520 | if (tmo <= 0) | |
521 | warn = 1; | |
522 | else if (tmo < next) | |
523 | next = tmo; | |
524 | } | |
525 | ||
4666faab | 526 | x->km.dying = warn; |
1da177e4 | 527 | if (warn) |
53bc6b4d | 528 | km_state_expired(x, 0, 0); |
1da177e4 | 529 | resched: |
9b7a787d | 530 | if (next != LONG_MAX) { |
9e0d57fd YP |
531 | tasklet_hrtimer_start(&x->mtimer, ktime_set(next, 0), HRTIMER_MODE_REL); |
532 | } | |
a47f0ce0 | 533 | |
1da177e4 LT |
534 | goto out; |
535 | ||
536 | expired: | |
5b8ef341 | 537 | if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) |
1da177e4 | 538 | x->km.state = XFRM_STATE_EXPIRED; |
161a09e7 JL |
539 | |
540 | err = __xfrm_state_delete(x); | |
0806ae4c | 541 | if (!err) |
53bc6b4d | 542 | km_state_expired(x, 1, 0); |
1da177e4 | 543 | |
2e71029e | 544 | xfrm_audit_state_delete(x, err ? 0 : 1, true); |
161a09e7 | 545 | |
1da177e4 LT |
546 | out: |
547 | spin_unlock(&x->lock); | |
9e0d57fd | 548 | return HRTIMER_NORESTART; |
1da177e4 LT |
549 | } |
550 | ||
0ac84752 DM |
551 | static void xfrm_replay_timer_handler(unsigned long data); |
552 | ||
673c09be | 553 | struct xfrm_state *xfrm_state_alloc(struct net *net) |
1da177e4 LT |
554 | { |
555 | struct xfrm_state *x; | |
556 | ||
0da974f4 | 557 | x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC); |
1da177e4 LT |
558 | |
559 | if (x) { | |
673c09be | 560 | write_pnet(&x->xs_net, net); |
88755e9c | 561 | refcount_set(&x->refcnt, 1); |
1da177e4 | 562 | atomic_set(&x->tunnel_users, 0); |
12a169e7 | 563 | INIT_LIST_HEAD(&x->km.all); |
8f126e37 DM |
564 | INIT_HLIST_NODE(&x->bydst); |
565 | INIT_HLIST_NODE(&x->bysrc); | |
566 | INIT_HLIST_NODE(&x->byspi); | |
99565a6c FD |
567 | tasklet_hrtimer_init(&x->mtimer, xfrm_timer_handler, |
568 | CLOCK_BOOTTIME, HRTIMER_MODE_ABS); | |
b24b8a24 PE |
569 | setup_timer(&x->rtimer, xfrm_replay_timer_handler, |
570 | (unsigned long)x); | |
9d729f72 | 571 | x->curlft.add_time = get_seconds(); |
1da177e4 LT |
572 | x->lft.soft_byte_limit = XFRM_INF; |
573 | x->lft.soft_packet_limit = XFRM_INF; | |
574 | x->lft.hard_byte_limit = XFRM_INF; | |
575 | x->lft.hard_packet_limit = XFRM_INF; | |
f8cd5488 JHS |
576 | x->replay_maxage = 0; |
577 | x->replay_maxdiff = 0; | |
df9dcb45 KM |
578 | x->inner_mode = NULL; |
579 | x->inner_mode_iaf = NULL; | |
1da177e4 LT |
580 | spin_lock_init(&x->lock); |
581 | } | |
582 | return x; | |
583 | } | |
584 | EXPORT_SYMBOL(xfrm_state_alloc); | |
585 | ||
586 | void __xfrm_state_destroy(struct xfrm_state *x) | |
587 | { | |
547b792c | 588 | WARN_ON(x->km.state != XFRM_STATE_DEAD); |
1da177e4 LT |
589 | |
590 | spin_lock_bh(&xfrm_state_gc_lock); | |
35db57bb | 591 | hlist_add_head(&x->gclist, &xfrm_state_gc_list); |
1da177e4 | 592 | spin_unlock_bh(&xfrm_state_gc_lock); |
35db57bb | 593 | schedule_work(&xfrm_state_gc_work); |
1da177e4 LT |
594 | } |
595 | EXPORT_SYMBOL(__xfrm_state_destroy); | |
596 | ||
53bc6b4d | 597 | int __xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 598 | { |
98806f75 | 599 | struct net *net = xs_net(x); |
26b15dad JHS |
600 | int err = -ESRCH; |
601 | ||
1da177e4 LT |
602 | if (x->km.state != XFRM_STATE_DEAD) { |
603 | x->km.state = XFRM_STATE_DEAD; | |
283bc9f3 | 604 | spin_lock(&net->xfrm.xfrm_state_lock); |
12a169e7 | 605 | list_del(&x->km.all); |
ae3fb6d3 FW |
606 | hlist_del_rcu(&x->bydst); |
607 | hlist_del_rcu(&x->bysrc); | |
a47f0ce0 | 608 | if (x->id.spi) |
ae3fb6d3 | 609 | hlist_del_rcu(&x->byspi); |
98806f75 | 610 | net->xfrm.state_num--; |
283bc9f3 | 611 | spin_unlock(&net->xfrm.xfrm_state_lock); |
1da177e4 | 612 | |
d77e38e6 SK |
613 | xfrm_dev_state_delete(x); |
614 | ||
1da177e4 LT |
615 | /* All xfrm_state objects are created by xfrm_state_alloc. |
616 | * The xfrm_state_alloc call gives a reference, and that | |
617 | * is what we are dropping here. | |
618 | */ | |
5dba4797 | 619 | xfrm_state_put(x); |
26b15dad | 620 | err = 0; |
1da177e4 | 621 | } |
26b15dad JHS |
622 | |
623 | return err; | |
1da177e4 | 624 | } |
53bc6b4d | 625 | EXPORT_SYMBOL(__xfrm_state_delete); |
1da177e4 | 626 | |
26b15dad | 627 | int xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 628 | { |
26b15dad JHS |
629 | int err; |
630 | ||
1da177e4 | 631 | spin_lock_bh(&x->lock); |
26b15dad | 632 | err = __xfrm_state_delete(x); |
1da177e4 | 633 | spin_unlock_bh(&x->lock); |
26b15dad JHS |
634 | |
635 | return err; | |
1da177e4 LT |
636 | } |
637 | EXPORT_SYMBOL(xfrm_state_delete); | |
638 | ||
4aa2e62c JL |
639 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
640 | static inline int | |
2e71029e | 641 | xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid) |
1da177e4 | 642 | { |
4aa2e62c JL |
643 | int i, err = 0; |
644 | ||
0e602451 | 645 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
4aa2e62c JL |
646 | struct xfrm_state *x; |
647 | ||
b67bfe0d | 648 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
4aa2e62c JL |
649 | if (xfrm_id_proto_match(x->id.proto, proto) && |
650 | (err = security_xfrm_state_delete(x)) != 0) { | |
2e71029e | 651 | xfrm_audit_state_delete(x, 0, task_valid); |
4aa2e62c JL |
652 | return err; |
653 | } | |
654 | } | |
655 | } | |
656 | ||
657 | return err; | |
658 | } | |
d77e38e6 SK |
659 | |
660 | static inline int | |
661 | xfrm_dev_state_flush_secctx_check(struct net *net, struct net_device *dev, bool task_valid) | |
662 | { | |
663 | int i, err = 0; | |
664 | ||
665 | for (i = 0; i <= net->xfrm.state_hmask; i++) { | |
666 | struct xfrm_state *x; | |
667 | struct xfrm_state_offload *xso; | |
668 | ||
669 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { | |
670 | xso = &x->xso; | |
671 | ||
672 | if (xso->dev == dev && | |
673 | (err = security_xfrm_state_delete(x)) != 0) { | |
674 | xfrm_audit_state_delete(x, 0, task_valid); | |
675 | return err; | |
676 | } | |
677 | } | |
678 | } | |
679 | ||
680 | return err; | |
681 | } | |
4aa2e62c JL |
682 | #else |
683 | static inline int | |
2e71029e | 684 | xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid) |
4aa2e62c JL |
685 | { |
686 | return 0; | |
687 | } | |
d77e38e6 SK |
688 | |
689 | static inline int | |
690 | xfrm_dev_state_flush_secctx_check(struct net *net, struct net_device *dev, bool task_valid) | |
691 | { | |
692 | return 0; | |
693 | } | |
4aa2e62c JL |
694 | #endif |
695 | ||
2e71029e | 696 | int xfrm_state_flush(struct net *net, u8 proto, bool task_valid) |
4aa2e62c | 697 | { |
9e64cc95 | 698 | int i, err = 0, cnt = 0; |
1da177e4 | 699 | |
283bc9f3 | 700 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
2e71029e | 701 | err = xfrm_state_flush_secctx_check(net, proto, task_valid); |
4aa2e62c JL |
702 | if (err) |
703 | goto out; | |
704 | ||
9e64cc95 | 705 | err = -ESRCH; |
0e602451 | 706 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
8f126e37 | 707 | struct xfrm_state *x; |
1da177e4 | 708 | restart: |
b67bfe0d | 709 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
1da177e4 | 710 | if (!xfrm_state_kern(x) && |
5794708f | 711 | xfrm_id_proto_match(x->id.proto, proto)) { |
1da177e4 | 712 | xfrm_state_hold(x); |
283bc9f3 | 713 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 714 | |
161a09e7 | 715 | err = xfrm_state_delete(x); |
ab5f5e8b | 716 | xfrm_audit_state_delete(x, err ? 0 : 1, |
2e71029e | 717 | task_valid); |
1da177e4 | 718 | xfrm_state_put(x); |
9e64cc95 JHS |
719 | if (!err) |
720 | cnt++; | |
1da177e4 | 721 | |
283bc9f3 | 722 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
723 | goto restart; |
724 | } | |
725 | } | |
726 | } | |
9e64cc95 JHS |
727 | if (cnt) |
728 | err = 0; | |
4aa2e62c JL |
729 | |
730 | out: | |
283bc9f3 | 731 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
4aa2e62c | 732 | return err; |
1da177e4 LT |
733 | } |
734 | EXPORT_SYMBOL(xfrm_state_flush); | |
735 | ||
d77e38e6 SK |
736 | int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid) |
737 | { | |
738 | int i, err = 0, cnt = 0; | |
739 | ||
740 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
741 | err = xfrm_dev_state_flush_secctx_check(net, dev, task_valid); | |
742 | if (err) | |
743 | goto out; | |
744 | ||
745 | err = -ESRCH; | |
746 | for (i = 0; i <= net->xfrm.state_hmask; i++) { | |
747 | struct xfrm_state *x; | |
748 | struct xfrm_state_offload *xso; | |
749 | restart: | |
750 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { | |
751 | xso = &x->xso; | |
752 | ||
753 | if (!xfrm_state_kern(x) && xso->dev == dev) { | |
754 | xfrm_state_hold(x); | |
755 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); | |
756 | ||
757 | err = xfrm_state_delete(x); | |
758 | xfrm_audit_state_delete(x, err ? 0 : 1, | |
759 | task_valid); | |
760 | xfrm_state_put(x); | |
761 | if (!err) | |
762 | cnt++; | |
763 | ||
764 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
765 | goto restart; | |
766 | } | |
767 | } | |
768 | } | |
769 | if (cnt) | |
770 | err = 0; | |
771 | ||
772 | out: | |
773 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); | |
774 | return err; | |
775 | } | |
776 | EXPORT_SYMBOL(xfrm_dev_state_flush); | |
777 | ||
e071041b | 778 | void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si) |
28d8909b | 779 | { |
283bc9f3 | 780 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
e071041b AD |
781 | si->sadcnt = net->xfrm.state_num; |
782 | si->sadhcnt = net->xfrm.state_hmask; | |
28d8909b | 783 | si->sadhmcnt = xfrm_state_hashmax; |
283bc9f3 | 784 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
28d8909b JHS |
785 | } |
786 | EXPORT_SYMBOL(xfrm_sad_getinfo); | |
787 | ||
711059b9 | 788 | static void |
1a898592 | 789 | xfrm_init_tempstate(struct xfrm_state *x, const struct flowi *fl, |
04686013 | 790 | const struct xfrm_tmpl *tmpl, |
33765d06 | 791 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
8444cf71 | 792 | unsigned short family) |
1da177e4 | 793 | { |
711059b9 FW |
794 | struct xfrm_state_afinfo *afinfo = xfrm_state_afinfo_get_rcu(family); |
795 | ||
3819a35f FW |
796 | if (!afinfo) |
797 | return; | |
798 | ||
799 | afinfo->init_tempsel(&x->sel, fl); | |
8444cf71 TE |
800 | |
801 | if (family != tmpl->encap_family) { | |
711059b9 | 802 | afinfo = xfrm_state_afinfo_get_rcu(tmpl->encap_family); |
8444cf71 | 803 | if (!afinfo) |
711059b9 | 804 | return; |
8444cf71 TE |
805 | } |
806 | afinfo->init_temprop(x, tmpl, daddr, saddr); | |
1da177e4 LT |
807 | } |
808 | ||
9aa60088 DM |
809 | static struct xfrm_state *__xfrm_state_lookup(struct net *net, u32 mark, |
810 | const xfrm_address_t *daddr, | |
811 | __be32 spi, u8 proto, | |
812 | unsigned short family) | |
edcd5821 | 813 | { |
221df1ed | 814 | unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family); |
edcd5821 DM |
815 | struct xfrm_state *x; |
816 | ||
ae3fb6d3 | 817 | hlist_for_each_entry_rcu(x, net->xfrm.state_byspi + h, byspi) { |
edcd5821 DM |
818 | if (x->props.family != family || |
819 | x->id.spi != spi || | |
1802571b | 820 | x->id.proto != proto || |
70e94e66 | 821 | !xfrm_addr_equal(&x->id.daddr, daddr, family)) |
edcd5821 DM |
822 | continue; |
823 | ||
3d6acfa7 JHS |
824 | if ((mark & x->mark.m) != x->mark.v) |
825 | continue; | |
02efdff7 FW |
826 | if (!xfrm_state_hold_rcu(x)) |
827 | continue; | |
edcd5821 DM |
828 | return x; |
829 | } | |
830 | ||
831 | return NULL; | |
832 | } | |
833 | ||
9aa60088 DM |
834 | static struct xfrm_state *__xfrm_state_lookup_byaddr(struct net *net, u32 mark, |
835 | const xfrm_address_t *daddr, | |
836 | const xfrm_address_t *saddr, | |
837 | u8 proto, unsigned short family) | |
edcd5821 | 838 | { |
221df1ed | 839 | unsigned int h = xfrm_src_hash(net, daddr, saddr, family); |
edcd5821 DM |
840 | struct xfrm_state *x; |
841 | ||
ae3fb6d3 | 842 | hlist_for_each_entry_rcu(x, net->xfrm.state_bysrc + h, bysrc) { |
edcd5821 | 843 | if (x->props.family != family || |
1802571b | 844 | x->id.proto != proto || |
70e94e66 YH |
845 | !xfrm_addr_equal(&x->id.daddr, daddr, family) || |
846 | !xfrm_addr_equal(&x->props.saddr, saddr, family)) | |
edcd5821 DM |
847 | continue; |
848 | ||
3d6acfa7 JHS |
849 | if ((mark & x->mark.m) != x->mark.v) |
850 | continue; | |
02efdff7 FW |
851 | if (!xfrm_state_hold_rcu(x)) |
852 | continue; | |
edcd5821 DM |
853 | return x; |
854 | } | |
855 | ||
856 | return NULL; | |
857 | } | |
858 | ||
859 | static inline struct xfrm_state * | |
860 | __xfrm_state_locate(struct xfrm_state *x, int use_spi, int family) | |
861 | { | |
221df1ed | 862 | struct net *net = xs_net(x); |
bd55775c | 863 | u32 mark = x->mark.v & x->mark.m; |
221df1ed | 864 | |
edcd5821 | 865 | if (use_spi) |
bd55775c JHS |
866 | return __xfrm_state_lookup(net, mark, &x->id.daddr, |
867 | x->id.spi, x->id.proto, family); | |
edcd5821 | 868 | else |
bd55775c JHS |
869 | return __xfrm_state_lookup_byaddr(net, mark, |
870 | &x->id.daddr, | |
edcd5821 DM |
871 | &x->props.saddr, |
872 | x->id.proto, family); | |
873 | } | |
874 | ||
98806f75 | 875 | static void xfrm_hash_grow_check(struct net *net, int have_hash_collision) |
2fab22f2 PM |
876 | { |
877 | if (have_hash_collision && | |
98806f75 AD |
878 | (net->xfrm.state_hmask + 1) < xfrm_state_hashmax && |
879 | net->xfrm.state_num > net->xfrm.state_hmask) | |
880 | schedule_work(&net->xfrm.state_hash_work); | |
2fab22f2 PM |
881 | } |
882 | ||
08ec9af1 | 883 | static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x, |
4a08ab0f | 884 | const struct flowi *fl, unsigned short family, |
08ec9af1 DM |
885 | struct xfrm_state **best, int *acq_in_progress, |
886 | int *error) | |
887 | { | |
888 | /* Resolution logic: | |
889 | * 1. There is a valid state with matching selector. Done. | |
890 | * 2. Valid state with inappropriate selector. Skip. | |
891 | * | |
892 | * Entering area of "sysdeps". | |
893 | * | |
894 | * 3. If state is not valid, selector is temporary, it selects | |
895 | * only session which triggered previous resolution. Key | |
896 | * manager will do something to install a state with proper | |
897 | * selector. | |
898 | */ | |
899 | if (x->km.state == XFRM_STATE_VALID) { | |
900 | if ((x->sel.family && | |
901 | !xfrm_selector_match(&x->sel, fl, x->sel.family)) || | |
902 | !security_xfrm_state_pol_flow_match(x, pol, fl)) | |
903 | return; | |
904 | ||
905 | if (!*best || | |
906 | (*best)->km.dying > x->km.dying || | |
907 | ((*best)->km.dying == x->km.dying && | |
908 | (*best)->curlft.add_time < x->curlft.add_time)) | |
909 | *best = x; | |
910 | } else if (x->km.state == XFRM_STATE_ACQ) { | |
911 | *acq_in_progress = 1; | |
912 | } else if (x->km.state == XFRM_STATE_ERROR || | |
913 | x->km.state == XFRM_STATE_EXPIRED) { | |
914 | if (xfrm_selector_match(&x->sel, fl, x->sel.family) && | |
915 | security_xfrm_state_pol_flow_match(x, pol, fl)) | |
916 | *error = -ESRCH; | |
917 | } | |
918 | } | |
919 | ||
1da177e4 | 920 | struct xfrm_state * |
33765d06 | 921 | xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
b520e9f6 | 922 | const struct flowi *fl, struct xfrm_tmpl *tmpl, |
1da177e4 LT |
923 | struct xfrm_policy *pol, int *err, |
924 | unsigned short family) | |
925 | { | |
08ec9af1 | 926 | static xfrm_address_t saddr_wildcard = { }; |
5447c5e4 | 927 | struct net *net = xp_net(pol); |
6a783c90 | 928 | unsigned int h, h_wildcard; |
37b08e34 | 929 | struct xfrm_state *x, *x0, *to_put; |
1da177e4 LT |
930 | int acquire_in_progress = 0; |
931 | int error = 0; | |
932 | struct xfrm_state *best = NULL; | |
bd55775c | 933 | u32 mark = pol->mark.v & pol->mark.m; |
8444cf71 | 934 | unsigned short encap_family = tmpl->encap_family; |
b65e3d7b | 935 | unsigned int sequence; |
0f24558e | 936 | struct km_event c; |
a716c119 | 937 | |
37b08e34 DM |
938 | to_put = NULL; |
939 | ||
b65e3d7b FW |
940 | sequence = read_seqcount_begin(&xfrm_state_hash_generation); |
941 | ||
d737a580 | 942 | rcu_read_lock(); |
8444cf71 | 943 | h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family); |
ae3fb6d3 | 944 | hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h, bydst) { |
8444cf71 | 945 | if (x->props.family == encap_family && |
1da177e4 | 946 | x->props.reqid == tmpl->reqid && |
3d6acfa7 | 947 | (mark & x->mark.m) == x->mark.v && |
fbd9a5b4 | 948 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
8444cf71 | 949 | xfrm_state_addr_check(x, daddr, saddr, encap_family) && |
1da177e4 LT |
950 | tmpl->mode == x->props.mode && |
951 | tmpl->id.proto == x->id.proto && | |
08ec9af1 | 952 | (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) |
1f673c5f | 953 | xfrm_state_look_at(pol, x, fl, encap_family, |
08ec9af1 DM |
954 | &best, &acquire_in_progress, &error); |
955 | } | |
6f115638 | 956 | if (best || acquire_in_progress) |
08ec9af1 DM |
957 | goto found; |
958 | ||
8444cf71 | 959 | h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, encap_family); |
ae3fb6d3 | 960 | hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h_wildcard, bydst) { |
8444cf71 | 961 | if (x->props.family == encap_family && |
08ec9af1 | 962 | x->props.reqid == tmpl->reqid && |
3d6acfa7 | 963 | (mark & x->mark.m) == x->mark.v && |
08ec9af1 | 964 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
f59bbdfa | 965 | xfrm_addr_equal(&x->id.daddr, daddr, encap_family) && |
08ec9af1 DM |
966 | tmpl->mode == x->props.mode && |
967 | tmpl->id.proto == x->id.proto && | |
968 | (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) | |
1f673c5f | 969 | xfrm_state_look_at(pol, x, fl, encap_family, |
08ec9af1 | 970 | &best, &acquire_in_progress, &error); |
1da177e4 LT |
971 | } |
972 | ||
08ec9af1 | 973 | found: |
1da177e4 LT |
974 | x = best; |
975 | if (!x && !error && !acquire_in_progress) { | |
5c5d281a | 976 | if (tmpl->id.spi && |
bd55775c | 977 | (x0 = __xfrm_state_lookup(net, mark, daddr, tmpl->id.spi, |
8444cf71 | 978 | tmpl->id.proto, encap_family)) != NULL) { |
37b08e34 | 979 | to_put = x0; |
1da177e4 LT |
980 | error = -EEXIST; |
981 | goto out; | |
982 | } | |
0f24558e HG |
983 | |
984 | c.net = net; | |
985 | /* If the KMs have no listeners (yet...), avoid allocating an SA | |
986 | * for each and every packet - garbage collection might not | |
987 | * handle the flood. | |
988 | */ | |
989 | if (!km_is_alive(&c)) { | |
990 | error = -ESRCH; | |
991 | goto out; | |
992 | } | |
993 | ||
5447c5e4 | 994 | x = xfrm_state_alloc(net); |
1da177e4 LT |
995 | if (x == NULL) { |
996 | error = -ENOMEM; | |
997 | goto out; | |
998 | } | |
8444cf71 | 999 | /* Initialize temporary state matching only |
1da177e4 | 1000 | * to current session. */ |
8444cf71 | 1001 | xfrm_init_tempstate(x, fl, tmpl, daddr, saddr, family); |
bd55775c | 1002 | memcpy(&x->mark, &pol->mark, sizeof(x->mark)); |
1da177e4 | 1003 | |
1d28f42c | 1004 | error = security_xfrm_state_alloc_acquire(x, pol->security, fl->flowi_secid); |
e0d1caa7 VY |
1005 | if (error) { |
1006 | x->km.state = XFRM_STATE_DEAD; | |
37b08e34 | 1007 | to_put = x; |
e0d1caa7 VY |
1008 | x = NULL; |
1009 | goto out; | |
1010 | } | |
1011 | ||
1da177e4 | 1012 | if (km_query(x, tmpl, pol) == 0) { |
d737a580 | 1013 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 1014 | x->km.state = XFRM_STATE_ACQ; |
5447c5e4 | 1015 | list_add(&x->km.all, &net->xfrm.state_all); |
ae3fb6d3 | 1016 | hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h); |
8444cf71 | 1017 | h = xfrm_src_hash(net, daddr, saddr, encap_family); |
ae3fb6d3 | 1018 | hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h); |
1da177e4 | 1019 | if (x->id.spi) { |
8444cf71 | 1020 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, encap_family); |
ae3fb6d3 | 1021 | hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h); |
1da177e4 | 1022 | } |
b27aeadb | 1023 | x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires; |
9e0d57fd | 1024 | tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL); |
5447c5e4 AD |
1025 | net->xfrm.state_num++; |
1026 | xfrm_hash_grow_check(net, x->bydst.next != NULL); | |
d737a580 | 1027 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1028 | } else { |
1029 | x->km.state = XFRM_STATE_DEAD; | |
37b08e34 | 1030 | to_put = x; |
1da177e4 LT |
1031 | x = NULL; |
1032 | error = -ESRCH; | |
1033 | } | |
1034 | } | |
1035 | out: | |
02efdff7 FW |
1036 | if (x) { |
1037 | if (!xfrm_state_hold_rcu(x)) { | |
1038 | *err = -EAGAIN; | |
1039 | x = NULL; | |
1040 | } | |
1041 | } else { | |
1da177e4 | 1042 | *err = acquire_in_progress ? -EAGAIN : error; |
02efdff7 | 1043 | } |
d737a580 | 1044 | rcu_read_unlock(); |
37b08e34 DM |
1045 | if (to_put) |
1046 | xfrm_state_put(to_put); | |
b65e3d7b FW |
1047 | |
1048 | if (read_seqcount_retry(&xfrm_state_hash_generation, sequence)) { | |
1049 | *err = -EAGAIN; | |
1050 | if (x) { | |
1051 | xfrm_state_put(x); | |
1052 | x = NULL; | |
1053 | } | |
1054 | } | |
1055 | ||
1da177e4 LT |
1056 | return x; |
1057 | } | |
1058 | ||
628529b6 | 1059 | struct xfrm_state * |
bd55775c | 1060 | xfrm_stateonly_find(struct net *net, u32 mark, |
5447c5e4 | 1061 | xfrm_address_t *daddr, xfrm_address_t *saddr, |
628529b6 JHS |
1062 | unsigned short family, u8 mode, u8 proto, u32 reqid) |
1063 | { | |
4bda4f25 | 1064 | unsigned int h; |
628529b6 | 1065 | struct xfrm_state *rx = NULL, *x = NULL; |
628529b6 | 1066 | |
4ae770bf | 1067 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
5447c5e4 | 1068 | h = xfrm_dst_hash(net, daddr, saddr, reqid, family); |
b67bfe0d | 1069 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
628529b6 JHS |
1070 | if (x->props.family == family && |
1071 | x->props.reqid == reqid && | |
3d6acfa7 | 1072 | (mark & x->mark.m) == x->mark.v && |
628529b6 JHS |
1073 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
1074 | xfrm_state_addr_check(x, daddr, saddr, family) && | |
1075 | mode == x->props.mode && | |
1076 | proto == x->id.proto && | |
1077 | x->km.state == XFRM_STATE_VALID) { | |
1078 | rx = x; | |
1079 | break; | |
1080 | } | |
1081 | } | |
1082 | ||
1083 | if (rx) | |
1084 | xfrm_state_hold(rx); | |
4ae770bf | 1085 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
628529b6 JHS |
1086 | |
1087 | ||
1088 | return rx; | |
1089 | } | |
1090 | EXPORT_SYMBOL(xfrm_stateonly_find); | |
1091 | ||
c454997e FD |
1092 | struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi, |
1093 | unsigned short family) | |
1094 | { | |
1095 | struct xfrm_state *x; | |
1096 | struct xfrm_state_walk *w; | |
1097 | ||
1098 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
1099 | list_for_each_entry(w, &net->xfrm.state_all, all) { | |
1100 | x = container_of(w, struct xfrm_state, km); | |
1101 | if (x->props.family != family || | |
1102 | x->id.spi != spi) | |
1103 | continue; | |
1104 | ||
c454997e | 1105 | xfrm_state_hold(x); |
bdddbf69 | 1106 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
c454997e FD |
1107 | return x; |
1108 | } | |
1109 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); | |
1110 | return NULL; | |
1111 | } | |
1112 | EXPORT_SYMBOL(xfrm_state_lookup_byspi); | |
1113 | ||
1da177e4 LT |
1114 | static void __xfrm_state_insert(struct xfrm_state *x) |
1115 | { | |
98806f75 | 1116 | struct net *net = xs_net(x); |
a624c108 | 1117 | unsigned int h; |
1da177e4 | 1118 | |
98806f75 | 1119 | list_add(&x->km.all, &net->xfrm.state_all); |
4c563f76 | 1120 | |
98806f75 | 1121 | h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr, |
c1969f29 | 1122 | x->props.reqid, x->props.family); |
ae3fb6d3 | 1123 | hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h); |
1da177e4 | 1124 | |
98806f75 | 1125 | h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family); |
ae3fb6d3 | 1126 | hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h); |
1da177e4 | 1127 | |
7b4dc360 | 1128 | if (x->id.spi) { |
98806f75 | 1129 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, |
6c44e6b7 MN |
1130 | x->props.family); |
1131 | ||
ae3fb6d3 | 1132 | hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h); |
6c44e6b7 MN |
1133 | } |
1134 | ||
9e0d57fd | 1135 | tasklet_hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL); |
a47f0ce0 DM |
1136 | if (x->replay_maxage) |
1137 | mod_timer(&x->rtimer, jiffies + x->replay_maxage); | |
f8cd5488 | 1138 | |
98806f75 | 1139 | net->xfrm.state_num++; |
f034b5d4 | 1140 | |
98806f75 | 1141 | xfrm_hash_grow_check(net, x->bydst.next != NULL); |
1da177e4 LT |
1142 | } |
1143 | ||
283bc9f3 | 1144 | /* net->xfrm.xfrm_state_lock is held */ |
c7f5ea3a DM |
1145 | static void __xfrm_state_bump_genids(struct xfrm_state *xnew) |
1146 | { | |
98806f75 | 1147 | struct net *net = xs_net(xnew); |
c7f5ea3a DM |
1148 | unsigned short family = xnew->props.family; |
1149 | u32 reqid = xnew->props.reqid; | |
1150 | struct xfrm_state *x; | |
c7f5ea3a | 1151 | unsigned int h; |
3d6acfa7 | 1152 | u32 mark = xnew->mark.v & xnew->mark.m; |
c7f5ea3a | 1153 | |
98806f75 | 1154 | h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family); |
b67bfe0d | 1155 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
c7f5ea3a DM |
1156 | if (x->props.family == family && |
1157 | x->props.reqid == reqid && | |
3d6acfa7 | 1158 | (mark & x->mark.m) == x->mark.v && |
70e94e66 YH |
1159 | xfrm_addr_equal(&x->id.daddr, &xnew->id.daddr, family) && |
1160 | xfrm_addr_equal(&x->props.saddr, &xnew->props.saddr, family)) | |
34996cb9 | 1161 | x->genid++; |
c7f5ea3a DM |
1162 | } |
1163 | } | |
1164 | ||
1da177e4 LT |
1165 | void xfrm_state_insert(struct xfrm_state *x) |
1166 | { | |
283bc9f3 FD |
1167 | struct net *net = xs_net(x); |
1168 | ||
1169 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
c7f5ea3a | 1170 | __xfrm_state_bump_genids(x); |
1da177e4 | 1171 | __xfrm_state_insert(x); |
283bc9f3 | 1172 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1173 | } |
1174 | EXPORT_SYMBOL(xfrm_state_insert); | |
1175 | ||
283bc9f3 | 1176 | /* net->xfrm.xfrm_state_lock is held */ |
e473fcb4 MK |
1177 | static struct xfrm_state *__find_acq_core(struct net *net, |
1178 | const struct xfrm_mark *m, | |
a70486f0 DM |
1179 | unsigned short family, u8 mode, |
1180 | u32 reqid, u8 proto, | |
1181 | const xfrm_address_t *daddr, | |
e473fcb4 MK |
1182 | const xfrm_address_t *saddr, |
1183 | int create) | |
2770834c | 1184 | { |
5447c5e4 | 1185 | unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family); |
2770834c | 1186 | struct xfrm_state *x; |
3d6acfa7 | 1187 | u32 mark = m->v & m->m; |
2770834c | 1188 | |
b67bfe0d | 1189 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
2770834c DM |
1190 | if (x->props.reqid != reqid || |
1191 | x->props.mode != mode || | |
1192 | x->props.family != family || | |
1193 | x->km.state != XFRM_STATE_ACQ || | |
75e252d9 | 1194 | x->id.spi != 0 || |
1802571b | 1195 | x->id.proto != proto || |
3d6acfa7 | 1196 | (mark & x->mark.m) != x->mark.v || |
70e94e66 YH |
1197 | !xfrm_addr_equal(&x->id.daddr, daddr, family) || |
1198 | !xfrm_addr_equal(&x->props.saddr, saddr, family)) | |
2770834c DM |
1199 | continue; |
1200 | ||
2770834c DM |
1201 | xfrm_state_hold(x); |
1202 | return x; | |
1203 | } | |
1204 | ||
1205 | if (!create) | |
1206 | return NULL; | |
1207 | ||
5447c5e4 | 1208 | x = xfrm_state_alloc(net); |
2770834c DM |
1209 | if (likely(x)) { |
1210 | switch (family) { | |
1211 | case AF_INET: | |
1212 | x->sel.daddr.a4 = daddr->a4; | |
1213 | x->sel.saddr.a4 = saddr->a4; | |
1214 | x->sel.prefixlen_d = 32; | |
1215 | x->sel.prefixlen_s = 32; | |
1216 | x->props.saddr.a4 = saddr->a4; | |
1217 | x->id.daddr.a4 = daddr->a4; | |
1218 | break; | |
1219 | ||
1220 | case AF_INET6: | |
15e318bd JB |
1221 | x->sel.daddr.in6 = daddr->in6; |
1222 | x->sel.saddr.in6 = saddr->in6; | |
2770834c DM |
1223 | x->sel.prefixlen_d = 128; |
1224 | x->sel.prefixlen_s = 128; | |
15e318bd JB |
1225 | x->props.saddr.in6 = saddr->in6; |
1226 | x->id.daddr.in6 = daddr->in6; | |
2770834c | 1227 | break; |
3ff50b79 | 1228 | } |
2770834c DM |
1229 | |
1230 | x->km.state = XFRM_STATE_ACQ; | |
1231 | x->id.proto = proto; | |
1232 | x->props.family = family; | |
1233 | x->props.mode = mode; | |
1234 | x->props.reqid = reqid; | |
bd55775c JHS |
1235 | x->mark.v = m->v; |
1236 | x->mark.m = m->m; | |
b27aeadb | 1237 | x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires; |
2770834c | 1238 | xfrm_state_hold(x); |
9e0d57fd | 1239 | tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL); |
5447c5e4 | 1240 | list_add(&x->km.all, &net->xfrm.state_all); |
ae3fb6d3 | 1241 | hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h); |
5447c5e4 | 1242 | h = xfrm_src_hash(net, daddr, saddr, family); |
ae3fb6d3 | 1243 | hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h); |
918049f0 | 1244 | |
5447c5e4 | 1245 | net->xfrm.state_num++; |
918049f0 | 1246 | |
5447c5e4 | 1247 | xfrm_hash_grow_check(net, x->bydst.next != NULL); |
2770834c DM |
1248 | } |
1249 | ||
1250 | return x; | |
1251 | } | |
1252 | ||
bd55775c | 1253 | static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); |
1da177e4 LT |
1254 | |
1255 | int xfrm_state_add(struct xfrm_state *x) | |
1256 | { | |
5447c5e4 | 1257 | struct net *net = xs_net(x); |
37b08e34 | 1258 | struct xfrm_state *x1, *to_put; |
1da177e4 LT |
1259 | int family; |
1260 | int err; | |
bd55775c | 1261 | u32 mark = x->mark.v & x->mark.m; |
eb2971b6 | 1262 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
1da177e4 LT |
1263 | |
1264 | family = x->props.family; | |
1da177e4 | 1265 | |
37b08e34 DM |
1266 | to_put = NULL; |
1267 | ||
283bc9f3 | 1268 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 1269 | |
edcd5821 | 1270 | x1 = __xfrm_state_locate(x, use_spi, family); |
1da177e4 | 1271 | if (x1) { |
37b08e34 | 1272 | to_put = x1; |
1da177e4 LT |
1273 | x1 = NULL; |
1274 | err = -EEXIST; | |
1275 | goto out; | |
1276 | } | |
1277 | ||
eb2971b6 | 1278 | if (use_spi && x->km.seq) { |
bd55775c | 1279 | x1 = __xfrm_find_acq_byseq(net, mark, x->km.seq); |
75e252d9 | 1280 | if (x1 && ((x1->id.proto != x->id.proto) || |
70e94e66 | 1281 | !xfrm_addr_equal(&x1->id.daddr, &x->id.daddr, family))) { |
37b08e34 | 1282 | to_put = x1; |
1da177e4 LT |
1283 | x1 = NULL; |
1284 | } | |
1285 | } | |
1286 | ||
eb2971b6 | 1287 | if (use_spi && !x1) |
bd55775c JHS |
1288 | x1 = __find_acq_core(net, &x->mark, family, x->props.mode, |
1289 | x->props.reqid, x->id.proto, | |
2770834c | 1290 | &x->id.daddr, &x->props.saddr, 0); |
1da177e4 | 1291 | |
c7f5ea3a | 1292 | __xfrm_state_bump_genids(x); |
1da177e4 LT |
1293 | __xfrm_state_insert(x); |
1294 | err = 0; | |
1295 | ||
1296 | out: | |
283bc9f3 | 1297 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1298 | |
1299 | if (x1) { | |
1300 | xfrm_state_delete(x1); | |
1301 | xfrm_state_put(x1); | |
1302 | } | |
1303 | ||
37b08e34 DM |
1304 | if (to_put) |
1305 | xfrm_state_put(to_put); | |
1306 | ||
1da177e4 LT |
1307 | return err; |
1308 | } | |
1309 | EXPORT_SYMBOL(xfrm_state_add); | |
1310 | ||
80c9abaa | 1311 | #ifdef CONFIG_XFRM_MIGRATE |
4ab47d47 AA |
1312 | static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, |
1313 | struct xfrm_encap_tmpl *encap) | |
80c9abaa | 1314 | { |
98806f75 | 1315 | struct net *net = xs_net(orig); |
98806f75 | 1316 | struct xfrm_state *x = xfrm_state_alloc(net); |
80c9abaa | 1317 | if (!x) |
553f9118 | 1318 | goto out; |
80c9abaa SS |
1319 | |
1320 | memcpy(&x->id, &orig->id, sizeof(x->id)); | |
1321 | memcpy(&x->sel, &orig->sel, sizeof(x->sel)); | |
1322 | memcpy(&x->lft, &orig->lft, sizeof(x->lft)); | |
1323 | x->props.mode = orig->props.mode; | |
1324 | x->props.replay_window = orig->props.replay_window; | |
1325 | x->props.reqid = orig->props.reqid; | |
1326 | x->props.family = orig->props.family; | |
1327 | x->props.saddr = orig->props.saddr; | |
1328 | ||
1329 | if (orig->aalg) { | |
4447bb33 | 1330 | x->aalg = xfrm_algo_auth_clone(orig->aalg); |
80c9abaa SS |
1331 | if (!x->aalg) |
1332 | goto error; | |
1333 | } | |
1334 | x->props.aalgo = orig->props.aalgo; | |
1335 | ||
ee5c2317 SK |
1336 | if (orig->aead) { |
1337 | x->aead = xfrm_algo_aead_clone(orig->aead); | |
1338 | if (!x->aead) | |
1339 | goto error; | |
1340 | } | |
80c9abaa SS |
1341 | if (orig->ealg) { |
1342 | x->ealg = xfrm_algo_clone(orig->ealg); | |
1343 | if (!x->ealg) | |
1344 | goto error; | |
1345 | } | |
1346 | x->props.ealgo = orig->props.ealgo; | |
1347 | ||
1348 | if (orig->calg) { | |
1349 | x->calg = xfrm_algo_clone(orig->calg); | |
1350 | if (!x->calg) | |
1351 | goto error; | |
1352 | } | |
1353 | x->props.calgo = orig->props.calgo; | |
1354 | ||
4ab47d47 AA |
1355 | if (encap || orig->encap) { |
1356 | if (encap) | |
1357 | x->encap = kmemdup(encap, sizeof(*x->encap), | |
1358 | GFP_KERNEL); | |
1359 | else | |
1360 | x->encap = kmemdup(orig->encap, sizeof(*x->encap), | |
1361 | GFP_KERNEL); | |
1362 | ||
80c9abaa SS |
1363 | if (!x->encap) |
1364 | goto error; | |
1365 | } | |
1366 | ||
1367 | if (orig->coaddr) { | |
1368 | x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr), | |
1369 | GFP_KERNEL); | |
1370 | if (!x->coaddr) | |
1371 | goto error; | |
1372 | } | |
1373 | ||
af2f464e | 1374 | if (orig->replay_esn) { |
cc9ab60e | 1375 | if (xfrm_replay_clone(x, orig)) |
af2f464e SK |
1376 | goto error; |
1377 | } | |
1378 | ||
bd55775c JHS |
1379 | memcpy(&x->mark, &orig->mark, sizeof(x->mark)); |
1380 | ||
cc9ab60e | 1381 | if (xfrm_init_state(x) < 0) |
80c9abaa SS |
1382 | goto error; |
1383 | ||
1384 | x->props.flags = orig->props.flags; | |
a947b0a9 | 1385 | x->props.extra_flags = orig->props.extra_flags; |
80c9abaa | 1386 | |
ee5c2317 SK |
1387 | x->tfcpad = orig->tfcpad; |
1388 | x->replay_maxdiff = orig->replay_maxdiff; | |
1389 | x->replay_maxage = orig->replay_maxage; | |
80c9abaa SS |
1390 | x->curlft.add_time = orig->curlft.add_time; |
1391 | x->km.state = orig->km.state; | |
1392 | x->km.seq = orig->km.seq; | |
a486cd23 AA |
1393 | x->replay = orig->replay; |
1394 | x->preplay = orig->preplay; | |
80c9abaa SS |
1395 | |
1396 | return x; | |
1397 | ||
1398 | error: | |
553f9118 HX |
1399 | xfrm_state_put(x); |
1400 | out: | |
80c9abaa SS |
1401 | return NULL; |
1402 | } | |
80c9abaa | 1403 | |
283bc9f3 | 1404 | struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net) |
80c9abaa SS |
1405 | { |
1406 | unsigned int h; | |
8c0cba22 SK |
1407 | struct xfrm_state *x = NULL; |
1408 | ||
1409 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
80c9abaa SS |
1410 | |
1411 | if (m->reqid) { | |
283bc9f3 | 1412 | h = xfrm_dst_hash(net, &m->old_daddr, &m->old_saddr, |
80c9abaa | 1413 | m->reqid, m->old_family); |
283bc9f3 | 1414 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
80c9abaa SS |
1415 | if (x->props.mode != m->mode || |
1416 | x->id.proto != m->proto) | |
1417 | continue; | |
1418 | if (m->reqid && x->props.reqid != m->reqid) | |
1419 | continue; | |
70e94e66 YH |
1420 | if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr, |
1421 | m->old_family) || | |
1422 | !xfrm_addr_equal(&x->props.saddr, &m->old_saddr, | |
1423 | m->old_family)) | |
80c9abaa SS |
1424 | continue; |
1425 | xfrm_state_hold(x); | |
8c0cba22 | 1426 | break; |
80c9abaa SS |
1427 | } |
1428 | } else { | |
283bc9f3 | 1429 | h = xfrm_src_hash(net, &m->old_daddr, &m->old_saddr, |
80c9abaa | 1430 | m->old_family); |
283bc9f3 | 1431 | hlist_for_each_entry(x, net->xfrm.state_bysrc+h, bysrc) { |
80c9abaa SS |
1432 | if (x->props.mode != m->mode || |
1433 | x->id.proto != m->proto) | |
1434 | continue; | |
70e94e66 YH |
1435 | if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr, |
1436 | m->old_family) || | |
1437 | !xfrm_addr_equal(&x->props.saddr, &m->old_saddr, | |
1438 | m->old_family)) | |
80c9abaa SS |
1439 | continue; |
1440 | xfrm_state_hold(x); | |
8c0cba22 | 1441 | break; |
80c9abaa SS |
1442 | } |
1443 | } | |
1444 | ||
8c0cba22 SK |
1445 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1446 | ||
1447 | return x; | |
80c9abaa SS |
1448 | } |
1449 | EXPORT_SYMBOL(xfrm_migrate_state_find); | |
1450 | ||
3e94c2dc | 1451 | struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, |
4ab47d47 AA |
1452 | struct xfrm_migrate *m, |
1453 | struct xfrm_encap_tmpl *encap) | |
80c9abaa SS |
1454 | { |
1455 | struct xfrm_state *xc; | |
80c9abaa | 1456 | |
4ab47d47 | 1457 | xc = xfrm_state_clone(x, encap); |
80c9abaa SS |
1458 | if (!xc) |
1459 | return NULL; | |
1460 | ||
1461 | memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr)); | |
1462 | memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr)); | |
1463 | ||
1464 | /* add state */ | |
70e94e66 | 1465 | if (xfrm_addr_equal(&x->id.daddr, &m->new_daddr, m->new_family)) { |
80c9abaa SS |
1466 | /* a care is needed when the destination address of the |
1467 | state is to be updated as it is a part of triplet */ | |
1468 | xfrm_state_insert(xc); | |
1469 | } else { | |
cc9ab60e | 1470 | if (xfrm_state_add(xc) < 0) |
80c9abaa SS |
1471 | goto error; |
1472 | } | |
1473 | ||
1474 | return xc; | |
1475 | error: | |
78347c8c | 1476 | xfrm_state_put(xc); |
80c9abaa SS |
1477 | return NULL; |
1478 | } | |
1479 | EXPORT_SYMBOL(xfrm_state_migrate); | |
1480 | #endif | |
1481 | ||
1da177e4 LT |
1482 | int xfrm_state_update(struct xfrm_state *x) |
1483 | { | |
37b08e34 | 1484 | struct xfrm_state *x1, *to_put; |
1da177e4 | 1485 | int err; |
eb2971b6 | 1486 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
283bc9f3 | 1487 | struct net *net = xs_net(x); |
1da177e4 | 1488 | |
37b08e34 DM |
1489 | to_put = NULL; |
1490 | ||
283bc9f3 | 1491 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
edcd5821 | 1492 | x1 = __xfrm_state_locate(x, use_spi, x->props.family); |
1da177e4 LT |
1493 | |
1494 | err = -ESRCH; | |
1495 | if (!x1) | |
1496 | goto out; | |
1497 | ||
1498 | if (xfrm_state_kern(x1)) { | |
37b08e34 | 1499 | to_put = x1; |
1da177e4 LT |
1500 | err = -EEXIST; |
1501 | goto out; | |
1502 | } | |
1503 | ||
1504 | if (x1->km.state == XFRM_STATE_ACQ) { | |
1505 | __xfrm_state_insert(x); | |
1506 | x = NULL; | |
1507 | } | |
1508 | err = 0; | |
1509 | ||
1510 | out: | |
283bc9f3 | 1511 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 1512 | |
37b08e34 DM |
1513 | if (to_put) |
1514 | xfrm_state_put(to_put); | |
1515 | ||
1da177e4 LT |
1516 | if (err) |
1517 | return err; | |
1518 | ||
1519 | if (!x) { | |
1520 | xfrm_state_delete(x1); | |
1521 | xfrm_state_put(x1); | |
1522 | return 0; | |
1523 | } | |
1524 | ||
1525 | err = -EINVAL; | |
1526 | spin_lock_bh(&x1->lock); | |
1527 | if (likely(x1->km.state == XFRM_STATE_VALID)) { | |
1528 | if (x->encap && x1->encap) | |
1529 | memcpy(x1->encap, x->encap, sizeof(*x1->encap)); | |
060f02a3 NT |
1530 | if (x->coaddr && x1->coaddr) { |
1531 | memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr)); | |
1532 | } | |
1533 | if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel))) | |
1534 | memcpy(&x1->sel, &x->sel, sizeof(x1->sel)); | |
1da177e4 LT |
1535 | memcpy(&x1->lft, &x->lft, sizeof(x1->lft)); |
1536 | x1->km.dying = 0; | |
1537 | ||
9e0d57fd | 1538 | tasklet_hrtimer_start(&x1->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL); |
1da177e4 LT |
1539 | if (x1->curlft.use_time) |
1540 | xfrm_state_check_expire(x1); | |
1541 | ||
1542 | err = 0; | |
8fcbc637 TG |
1543 | x->km.state = XFRM_STATE_DEAD; |
1544 | __xfrm_state_put(x); | |
1da177e4 LT |
1545 | } |
1546 | spin_unlock_bh(&x1->lock); | |
1547 | ||
1548 | xfrm_state_put(x1); | |
1549 | ||
1550 | return err; | |
1551 | } | |
1552 | EXPORT_SYMBOL(xfrm_state_update); | |
1553 | ||
1554 | int xfrm_state_check_expire(struct xfrm_state *x) | |
1555 | { | |
1556 | if (!x->curlft.use_time) | |
9d729f72 | 1557 | x->curlft.use_time = get_seconds(); |
1da177e4 | 1558 | |
1da177e4 LT |
1559 | if (x->curlft.bytes >= x->lft.hard_byte_limit || |
1560 | x->curlft.packets >= x->lft.hard_packet_limit) { | |
4666faab | 1561 | x->km.state = XFRM_STATE_EXPIRED; |
8b0e1953 | 1562 | tasklet_hrtimer_start(&x->mtimer, 0, HRTIMER_MODE_REL); |
1da177e4 LT |
1563 | return -EINVAL; |
1564 | } | |
1565 | ||
1566 | if (!x->km.dying && | |
1567 | (x->curlft.bytes >= x->lft.soft_byte_limit || | |
4666faab HX |
1568 | x->curlft.packets >= x->lft.soft_packet_limit)) { |
1569 | x->km.dying = 1; | |
53bc6b4d | 1570 | km_state_expired(x, 0, 0); |
4666faab | 1571 | } |
1da177e4 LT |
1572 | return 0; |
1573 | } | |
1574 | EXPORT_SYMBOL(xfrm_state_check_expire); | |
1575 | ||
1da177e4 | 1576 | struct xfrm_state * |
a70486f0 | 1577 | xfrm_state_lookup(struct net *net, u32 mark, const xfrm_address_t *daddr, __be32 spi, |
bd55775c | 1578 | u8 proto, unsigned short family) |
1da177e4 LT |
1579 | { |
1580 | struct xfrm_state *x; | |
1da177e4 | 1581 | |
c2f672fc | 1582 | rcu_read_lock(); |
bd55775c | 1583 | x = __xfrm_state_lookup(net, mark, daddr, spi, proto, family); |
c2f672fc | 1584 | rcu_read_unlock(); |
1da177e4 LT |
1585 | return x; |
1586 | } | |
1587 | EXPORT_SYMBOL(xfrm_state_lookup); | |
1588 | ||
1589 | struct xfrm_state * | |
bd55775c | 1590 | xfrm_state_lookup_byaddr(struct net *net, u32 mark, |
a70486f0 | 1591 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
eb2971b6 MN |
1592 | u8 proto, unsigned short family) |
1593 | { | |
1594 | struct xfrm_state *x; | |
eb2971b6 | 1595 | |
283bc9f3 | 1596 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1597 | x = __xfrm_state_lookup_byaddr(net, mark, daddr, saddr, proto, family); |
283bc9f3 | 1598 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
eb2971b6 MN |
1599 | return x; |
1600 | } | |
1601 | EXPORT_SYMBOL(xfrm_state_lookup_byaddr); | |
1602 | ||
1603 | struct xfrm_state * | |
e473fcb4 MK |
1604 | xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, u8 mode, u32 reqid, |
1605 | u8 proto, const xfrm_address_t *daddr, | |
1606 | const xfrm_address_t *saddr, int create, unsigned short family) | |
1da177e4 LT |
1607 | { |
1608 | struct xfrm_state *x; | |
1da177e4 | 1609 | |
283bc9f3 | 1610 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1611 | x = __find_acq_core(net, mark, family, mode, reqid, proto, daddr, saddr, create); |
283bc9f3 | 1612 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
2770834c | 1613 | |
1da177e4 LT |
1614 | return x; |
1615 | } | |
1616 | EXPORT_SYMBOL(xfrm_find_acq); | |
1617 | ||
41a49cc3 MN |
1618 | #ifdef CONFIG_XFRM_SUB_POLICY |
1619 | int | |
1620 | xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, | |
283bc9f3 | 1621 | unsigned short family, struct net *net) |
41a49cc3 | 1622 | { |
3f5a95ad | 1623 | int i; |
41a49cc3 MN |
1624 | int err = 0; |
1625 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
1626 | if (!afinfo) | |
1627 | return -EAFNOSUPPORT; | |
1628 | ||
283bc9f3 | 1629 | spin_lock_bh(&net->xfrm.xfrm_state_lock); /*FIXME*/ |
41a49cc3 MN |
1630 | if (afinfo->tmpl_sort) |
1631 | err = afinfo->tmpl_sort(dst, src, n); | |
3f5a95ad KD |
1632 | else |
1633 | for (i = 0; i < n; i++) | |
1634 | dst[i] = src[i]; | |
283bc9f3 | 1635 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
af5d27c4 | 1636 | rcu_read_unlock(); |
41a49cc3 MN |
1637 | return err; |
1638 | } | |
1639 | EXPORT_SYMBOL(xfrm_tmpl_sort); | |
1640 | ||
1641 | int | |
1642 | xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, | |
1643 | unsigned short family) | |
1644 | { | |
3f5a95ad | 1645 | int i; |
41a49cc3 MN |
1646 | int err = 0; |
1647 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
35ea790d | 1648 | struct net *net = xs_net(*src); |
283bc9f3 | 1649 | |
41a49cc3 MN |
1650 | if (!afinfo) |
1651 | return -EAFNOSUPPORT; | |
1652 | ||
283bc9f3 | 1653 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
41a49cc3 MN |
1654 | if (afinfo->state_sort) |
1655 | err = afinfo->state_sort(dst, src, n); | |
3f5a95ad KD |
1656 | else |
1657 | for (i = 0; i < n; i++) | |
1658 | dst[i] = src[i]; | |
283bc9f3 | 1659 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
af5d27c4 | 1660 | rcu_read_unlock(); |
41a49cc3 MN |
1661 | return err; |
1662 | } | |
1663 | EXPORT_SYMBOL(xfrm_state_sort); | |
1664 | #endif | |
1665 | ||
1da177e4 LT |
1666 | /* Silly enough, but I'm lazy to build resolution list */ |
1667 | ||
bd55775c | 1668 | static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq) |
1da177e4 LT |
1669 | { |
1670 | int i; | |
1da177e4 | 1671 | |
5447c5e4 | 1672 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
8f126e37 DM |
1673 | struct xfrm_state *x; |
1674 | ||
b67bfe0d | 1675 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
8f126e37 | 1676 | if (x->km.seq == seq && |
3d6acfa7 | 1677 | (mark & x->mark.m) == x->mark.v && |
8f126e37 | 1678 | x->km.state == XFRM_STATE_ACQ) { |
1da177e4 LT |
1679 | xfrm_state_hold(x); |
1680 | return x; | |
1681 | } | |
1682 | } | |
1683 | } | |
1684 | return NULL; | |
1685 | } | |
1686 | ||
bd55775c | 1687 | struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq) |
1da177e4 LT |
1688 | { |
1689 | struct xfrm_state *x; | |
1690 | ||
283bc9f3 | 1691 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1692 | x = __xfrm_find_acq_byseq(net, mark, seq); |
283bc9f3 | 1693 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1694 | return x; |
1695 | } | |
1696 | EXPORT_SYMBOL(xfrm_find_acq_byseq); | |
1697 | ||
1698 | u32 xfrm_get_acqseq(void) | |
1699 | { | |
1700 | u32 res; | |
6836b9bd | 1701 | static atomic_t acqseq; |
1702 | ||
1703 | do { | |
1704 | res = atomic_inc_return(&acqseq); | |
1705 | } while (!res); | |
1da177e4 | 1706 | |
1da177e4 LT |
1707 | return res; |
1708 | } | |
1709 | EXPORT_SYMBOL(xfrm_get_acqseq); | |
1710 | ||
776e9dd9 FD |
1711 | int verify_spi_info(u8 proto, u32 min, u32 max) |
1712 | { | |
1713 | switch (proto) { | |
1714 | case IPPROTO_AH: | |
1715 | case IPPROTO_ESP: | |
1716 | break; | |
1717 | ||
1718 | case IPPROTO_COMP: | |
1719 | /* IPCOMP spi is 16-bits. */ | |
1720 | if (max >= 0x10000) | |
1721 | return -EINVAL; | |
1722 | break; | |
1723 | ||
1724 | default: | |
1725 | return -EINVAL; | |
1726 | } | |
1727 | ||
1728 | if (min > max) | |
1729 | return -EINVAL; | |
1730 | ||
1731 | return 0; | |
1732 | } | |
1733 | EXPORT_SYMBOL(verify_spi_info); | |
1734 | ||
658b219e | 1735 | int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high) |
1da177e4 | 1736 | { |
221df1ed | 1737 | struct net *net = xs_net(x); |
f034b5d4 | 1738 | unsigned int h; |
1da177e4 | 1739 | struct xfrm_state *x0; |
658b219e HX |
1740 | int err = -ENOENT; |
1741 | __be32 minspi = htonl(low); | |
1742 | __be32 maxspi = htonl(high); | |
bd55775c | 1743 | u32 mark = x->mark.v & x->mark.m; |
1da177e4 | 1744 | |
658b219e HX |
1745 | spin_lock_bh(&x->lock); |
1746 | if (x->km.state == XFRM_STATE_DEAD) | |
1747 | goto unlock; | |
1748 | ||
1749 | err = 0; | |
1da177e4 | 1750 | if (x->id.spi) |
658b219e HX |
1751 | goto unlock; |
1752 | ||
1753 | err = -ENOENT; | |
1da177e4 LT |
1754 | |
1755 | if (minspi == maxspi) { | |
bd55775c | 1756 | x0 = xfrm_state_lookup(net, mark, &x->id.daddr, minspi, x->id.proto, x->props.family); |
1da177e4 LT |
1757 | if (x0) { |
1758 | xfrm_state_put(x0); | |
658b219e | 1759 | goto unlock; |
1da177e4 LT |
1760 | } |
1761 | x->id.spi = minspi; | |
1762 | } else { | |
1763 | u32 spi = 0; | |
9b7a787d | 1764 | for (h = 0; h < high-low+1; h++) { |
63862b5b | 1765 | spi = low + prandom_u32()%(high-low+1); |
bd55775c | 1766 | x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family); |
1da177e4 LT |
1767 | if (x0 == NULL) { |
1768 | x->id.spi = htonl(spi); | |
1769 | break; | |
1770 | } | |
1771 | xfrm_state_put(x0); | |
1772 | } | |
1773 | } | |
1774 | if (x->id.spi) { | |
283bc9f3 | 1775 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12604d8a | 1776 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family); |
ae3fb6d3 | 1777 | hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h); |
283bc9f3 | 1778 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
658b219e HX |
1779 | |
1780 | err = 0; | |
1da177e4 | 1781 | } |
658b219e HX |
1782 | |
1783 | unlock: | |
1784 | spin_unlock_bh(&x->lock); | |
1785 | ||
1786 | return err; | |
1da177e4 LT |
1787 | } |
1788 | EXPORT_SYMBOL(xfrm_alloc_spi); | |
1789 | ||
d3623099 | 1790 | static bool __xfrm_state_filter_match(struct xfrm_state *x, |
870a2df4 | 1791 | struct xfrm_address_filter *filter) |
d3623099 ND |
1792 | { |
1793 | if (filter) { | |
1794 | if ((filter->family == AF_INET || | |
1795 | filter->family == AF_INET6) && | |
1796 | x->props.family != filter->family) | |
1797 | return false; | |
1798 | ||
1799 | return addr_match(&x->props.saddr, &filter->saddr, | |
1800 | filter->splen) && | |
1801 | addr_match(&x->id.daddr, &filter->daddr, | |
1802 | filter->dplen); | |
1803 | } | |
1804 | return true; | |
1805 | } | |
1806 | ||
284fa7da | 1807 | int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, |
4c563f76 | 1808 | int (*func)(struct xfrm_state *, int, void*), |
1da177e4 LT |
1809 | void *data) |
1810 | { | |
12a169e7 HX |
1811 | struct xfrm_state *state; |
1812 | struct xfrm_state_walk *x; | |
1da177e4 LT |
1813 | int err = 0; |
1814 | ||
12a169e7 | 1815 | if (walk->seq != 0 && list_empty(&walk->all)) |
4c563f76 TT |
1816 | return 0; |
1817 | ||
283bc9f3 | 1818 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12a169e7 | 1819 | if (list_empty(&walk->all)) |
284fa7da | 1820 | x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all); |
12a169e7 | 1821 | else |
80077702 | 1822 | x = list_first_entry(&walk->all, struct xfrm_state_walk, all); |
284fa7da | 1823 | list_for_each_entry_from(x, &net->xfrm.state_all, all) { |
12a169e7 | 1824 | if (x->state == XFRM_STATE_DEAD) |
4c563f76 | 1825 | continue; |
12a169e7 HX |
1826 | state = container_of(x, struct xfrm_state, km); |
1827 | if (!xfrm_id_proto_match(state->id.proto, walk->proto)) | |
4c563f76 | 1828 | continue; |
d3623099 ND |
1829 | if (!__xfrm_state_filter_match(state, walk->filter)) |
1830 | continue; | |
12a169e7 HX |
1831 | err = func(state, walk->seq, data); |
1832 | if (err) { | |
1833 | list_move_tail(&walk->all, &x->all); | |
1834 | goto out; | |
1da177e4 | 1835 | } |
12a169e7 | 1836 | walk->seq++; |
1da177e4 | 1837 | } |
12a169e7 | 1838 | if (walk->seq == 0) { |
1da177e4 LT |
1839 | err = -ENOENT; |
1840 | goto out; | |
1841 | } | |
12a169e7 | 1842 | list_del_init(&walk->all); |
1da177e4 | 1843 | out: |
283bc9f3 | 1844 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1845 | return err; |
1846 | } | |
1847 | EXPORT_SYMBOL(xfrm_state_walk); | |
1848 | ||
d3623099 | 1849 | void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto, |
870a2df4 | 1850 | struct xfrm_address_filter *filter) |
5c182458 | 1851 | { |
12a169e7 | 1852 | INIT_LIST_HEAD(&walk->all); |
5c182458 | 1853 | walk->proto = proto; |
12a169e7 HX |
1854 | walk->state = XFRM_STATE_DEAD; |
1855 | walk->seq = 0; | |
d3623099 | 1856 | walk->filter = filter; |
5c182458 HX |
1857 | } |
1858 | EXPORT_SYMBOL(xfrm_state_walk_init); | |
1859 | ||
283bc9f3 | 1860 | void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net) |
abb81c4f | 1861 | { |
d3623099 ND |
1862 | kfree(walk->filter); |
1863 | ||
12a169e7 | 1864 | if (list_empty(&walk->all)) |
5c182458 | 1865 | return; |
5c182458 | 1866 | |
283bc9f3 | 1867 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12a169e7 | 1868 | list_del(&walk->all); |
283bc9f3 | 1869 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
abb81c4f HX |
1870 | } |
1871 | EXPORT_SYMBOL(xfrm_state_walk_done); | |
1872 | ||
f8cd5488 JHS |
1873 | static void xfrm_replay_timer_handler(unsigned long data) |
1874 | { | |
3e94c2dc | 1875 | struct xfrm_state *x = (struct xfrm_state *)data; |
f8cd5488 JHS |
1876 | |
1877 | spin_lock(&x->lock); | |
1878 | ||
2717096a | 1879 | if (x->km.state == XFRM_STATE_VALID) { |
a6483b79 | 1880 | if (xfrm_aevent_is_on(xs_net(x))) |
9fdc4883 | 1881 | x->repl->notify(x, XFRM_REPLAY_TIMEOUT); |
2717096a JHS |
1882 | else |
1883 | x->xflags |= XFRM_TIME_DEFER; | |
1884 | } | |
f8cd5488 JHS |
1885 | |
1886 | spin_unlock(&x->lock); | |
1887 | } | |
1888 | ||
df01812e | 1889 | static LIST_HEAD(xfrm_km_list); |
1da177e4 | 1890 | |
214e005b | 1891 | void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
1da177e4 LT |
1892 | { |
1893 | struct xfrm_mgr *km; | |
1894 | ||
85168c00 CW |
1895 | rcu_read_lock(); |
1896 | list_for_each_entry_rcu(km, &xfrm_km_list, list) | |
26b15dad JHS |
1897 | if (km->notify_policy) |
1898 | km->notify_policy(xp, dir, c); | |
85168c00 | 1899 | rcu_read_unlock(); |
26b15dad | 1900 | } |
1da177e4 | 1901 | |
214e005b | 1902 | void km_state_notify(struct xfrm_state *x, const struct km_event *c) |
26b15dad JHS |
1903 | { |
1904 | struct xfrm_mgr *km; | |
85168c00 CW |
1905 | rcu_read_lock(); |
1906 | list_for_each_entry_rcu(km, &xfrm_km_list, list) | |
26b15dad JHS |
1907 | if (km->notify) |
1908 | km->notify(x, c); | |
85168c00 | 1909 | rcu_read_unlock(); |
26b15dad JHS |
1910 | } |
1911 | ||
1912 | EXPORT_SYMBOL(km_policy_notify); | |
1913 | EXPORT_SYMBOL(km_state_notify); | |
1914 | ||
15e47304 | 1915 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid) |
26b15dad JHS |
1916 | { |
1917 | struct km_event c; | |
1918 | ||
bf08867f | 1919 | c.data.hard = hard; |
15e47304 | 1920 | c.portid = portid; |
f60f6b8f | 1921 | c.event = XFRM_MSG_EXPIRE; |
26b15dad | 1922 | km_state_notify(x, &c); |
1da177e4 LT |
1923 | } |
1924 | ||
53bc6b4d | 1925 | EXPORT_SYMBOL(km_state_expired); |
26b15dad JHS |
1926 | /* |
1927 | * We send to all registered managers regardless of failure | |
1928 | * We are happy with one success | |
1929 | */ | |
980ebd25 | 1930 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol) |
1da177e4 | 1931 | { |
26b15dad | 1932 | int err = -EINVAL, acqret; |
1da177e4 LT |
1933 | struct xfrm_mgr *km; |
1934 | ||
85168c00 CW |
1935 | rcu_read_lock(); |
1936 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
65e0736b | 1937 | acqret = km->acquire(x, t, pol); |
26b15dad JHS |
1938 | if (!acqret) |
1939 | err = acqret; | |
1da177e4 | 1940 | } |
85168c00 | 1941 | rcu_read_unlock(); |
1da177e4 LT |
1942 | return err; |
1943 | } | |
980ebd25 | 1944 | EXPORT_SYMBOL(km_query); |
1da177e4 | 1945 | |
5d36b180 | 1946 | int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) |
1da177e4 LT |
1947 | { |
1948 | int err = -EINVAL; | |
1949 | struct xfrm_mgr *km; | |
1950 | ||
85168c00 CW |
1951 | rcu_read_lock(); |
1952 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
1da177e4 LT |
1953 | if (km->new_mapping) |
1954 | err = km->new_mapping(x, ipaddr, sport); | |
1955 | if (!err) | |
1956 | break; | |
1957 | } | |
85168c00 | 1958 | rcu_read_unlock(); |
1da177e4 LT |
1959 | return err; |
1960 | } | |
1961 | EXPORT_SYMBOL(km_new_mapping); | |
1962 | ||
15e47304 | 1963 | void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid) |
1da177e4 | 1964 | { |
26b15dad | 1965 | struct km_event c; |
1da177e4 | 1966 | |
bf08867f | 1967 | c.data.hard = hard; |
15e47304 | 1968 | c.portid = portid; |
f60f6b8f | 1969 | c.event = XFRM_MSG_POLEXPIRE; |
26b15dad | 1970 | km_policy_notify(pol, dir, &c); |
1da177e4 | 1971 | } |
a70fcb0b | 1972 | EXPORT_SYMBOL(km_policy_expired); |
1da177e4 | 1973 | |
2d60abc2 | 1974 | #ifdef CONFIG_XFRM_MIGRATE |
183cad12 DM |
1975 | int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1976 | const struct xfrm_migrate *m, int num_migrate, | |
8bafd730 AA |
1977 | const struct xfrm_kmaddress *k, |
1978 | const struct xfrm_encap_tmpl *encap) | |
80c9abaa SS |
1979 | { |
1980 | int err = -EINVAL; | |
1981 | int ret; | |
1982 | struct xfrm_mgr *km; | |
1983 | ||
85168c00 CW |
1984 | rcu_read_lock(); |
1985 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
80c9abaa | 1986 | if (km->migrate) { |
8bafd730 AA |
1987 | ret = km->migrate(sel, dir, type, m, num_migrate, k, |
1988 | encap); | |
80c9abaa SS |
1989 | if (!ret) |
1990 | err = ret; | |
1991 | } | |
1992 | } | |
85168c00 | 1993 | rcu_read_unlock(); |
80c9abaa SS |
1994 | return err; |
1995 | } | |
1996 | EXPORT_SYMBOL(km_migrate); | |
2d60abc2 | 1997 | #endif |
80c9abaa | 1998 | |
db983c11 | 1999 | int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr) |
97a64b45 MN |
2000 | { |
2001 | int err = -EINVAL; | |
2002 | int ret; | |
2003 | struct xfrm_mgr *km; | |
2004 | ||
85168c00 CW |
2005 | rcu_read_lock(); |
2006 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
97a64b45 | 2007 | if (km->report) { |
db983c11 | 2008 | ret = km->report(net, proto, sel, addr); |
97a64b45 MN |
2009 | if (!ret) |
2010 | err = ret; | |
2011 | } | |
2012 | } | |
85168c00 | 2013 | rcu_read_unlock(); |
97a64b45 MN |
2014 | return err; |
2015 | } | |
2016 | EXPORT_SYMBOL(km_report); | |
2017 | ||
0f24558e HG |
2018 | bool km_is_alive(const struct km_event *c) |
2019 | { | |
2020 | struct xfrm_mgr *km; | |
2021 | bool is_alive = false; | |
2022 | ||
2023 | rcu_read_lock(); | |
2024 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
2025 | if (km->is_alive && km->is_alive(c)) { | |
2026 | is_alive = true; | |
2027 | break; | |
2028 | } | |
2029 | } | |
2030 | rcu_read_unlock(); | |
2031 | ||
2032 | return is_alive; | |
2033 | } | |
2034 | EXPORT_SYMBOL(km_is_alive); | |
2035 | ||
1da177e4 LT |
2036 | int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) |
2037 | { | |
2038 | int err; | |
2039 | u8 *data; | |
2040 | struct xfrm_mgr *km; | |
2041 | struct xfrm_policy *pol = NULL; | |
2042 | ||
2043 | if (optlen <= 0 || optlen > PAGE_SIZE) | |
2044 | return -EMSGSIZE; | |
2045 | ||
a133d930 GT |
2046 | data = memdup_user(optval, optlen); |
2047 | if (IS_ERR(data)) | |
2048 | return PTR_ERR(data); | |
1da177e4 LT |
2049 | |
2050 | err = -EINVAL; | |
85168c00 CW |
2051 | rcu_read_lock(); |
2052 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
cb969f07 | 2053 | pol = km->compile_policy(sk, optname, data, |
1da177e4 LT |
2054 | optlen, &err); |
2055 | if (err >= 0) | |
2056 | break; | |
2057 | } | |
85168c00 | 2058 | rcu_read_unlock(); |
1da177e4 LT |
2059 | |
2060 | if (err >= 0) { | |
2061 | xfrm_sk_policy_insert(sk, err, pol); | |
2062 | xfrm_pol_put(pol); | |
2063 | err = 0; | |
2064 | } | |
2065 | ||
1da177e4 LT |
2066 | kfree(data); |
2067 | return err; | |
2068 | } | |
2069 | EXPORT_SYMBOL(xfrm_user_policy); | |
2070 | ||
85168c00 CW |
2071 | static DEFINE_SPINLOCK(xfrm_km_lock); |
2072 | ||
1da177e4 LT |
2073 | int xfrm_register_km(struct xfrm_mgr *km) |
2074 | { | |
85168c00 CW |
2075 | spin_lock_bh(&xfrm_km_lock); |
2076 | list_add_tail_rcu(&km->list, &xfrm_km_list); | |
2077 | spin_unlock_bh(&xfrm_km_lock); | |
1da177e4 LT |
2078 | return 0; |
2079 | } | |
2080 | EXPORT_SYMBOL(xfrm_register_km); | |
2081 | ||
2082 | int xfrm_unregister_km(struct xfrm_mgr *km) | |
2083 | { | |
85168c00 CW |
2084 | spin_lock_bh(&xfrm_km_lock); |
2085 | list_del_rcu(&km->list); | |
2086 | spin_unlock_bh(&xfrm_km_lock); | |
2087 | synchronize_rcu(); | |
1da177e4 LT |
2088 | return 0; |
2089 | } | |
2090 | EXPORT_SYMBOL(xfrm_unregister_km); | |
2091 | ||
2092 | int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo) | |
2093 | { | |
2094 | int err = 0; | |
423826a7 FW |
2095 | |
2096 | if (WARN_ON(afinfo->family >= NPROTO)) | |
1da177e4 | 2097 | return -EAFNOSUPPORT; |
423826a7 | 2098 | |
44abdc30 | 2099 | spin_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 | 2100 | if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL)) |
f31e8d4f | 2101 | err = -EEXIST; |
edcd5821 | 2102 | else |
44abdc30 CW |
2103 | rcu_assign_pointer(xfrm_state_afinfo[afinfo->family], afinfo); |
2104 | spin_unlock_bh(&xfrm_state_afinfo_lock); | |
1da177e4 LT |
2105 | return err; |
2106 | } | |
2107 | EXPORT_SYMBOL(xfrm_state_register_afinfo); | |
2108 | ||
2109 | int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo) | |
2110 | { | |
423826a7 FW |
2111 | int err = 0, family = afinfo->family; |
2112 | ||
2113 | if (WARN_ON(family >= NPROTO)) | |
1da177e4 | 2114 | return -EAFNOSUPPORT; |
423826a7 | 2115 | |
44abdc30 | 2116 | spin_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 | 2117 | if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) { |
423826a7 | 2118 | if (rcu_access_pointer(xfrm_state_afinfo[family]) != afinfo) |
1da177e4 | 2119 | err = -EINVAL; |
edcd5821 | 2120 | else |
44abdc30 | 2121 | RCU_INIT_POINTER(xfrm_state_afinfo[afinfo->family], NULL); |
1da177e4 | 2122 | } |
44abdc30 CW |
2123 | spin_unlock_bh(&xfrm_state_afinfo_lock); |
2124 | synchronize_rcu(); | |
1da177e4 LT |
2125 | return err; |
2126 | } | |
2127 | EXPORT_SYMBOL(xfrm_state_unregister_afinfo); | |
2128 | ||
711059b9 FW |
2129 | struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family) |
2130 | { | |
2131 | if (unlikely(family >= NPROTO)) | |
2132 | return NULL; | |
2133 | ||
2134 | return rcu_dereference(xfrm_state_afinfo[family]); | |
2135 | } | |
2136 | ||
628e341f | 2137 | struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family) |
1da177e4 LT |
2138 | { |
2139 | struct xfrm_state_afinfo *afinfo; | |
2140 | if (unlikely(family >= NPROTO)) | |
2141 | return NULL; | |
44abdc30 CW |
2142 | rcu_read_lock(); |
2143 | afinfo = rcu_dereference(xfrm_state_afinfo[family]); | |
546be240 | 2144 | if (unlikely(!afinfo)) |
44abdc30 | 2145 | rcu_read_unlock(); |
1da177e4 LT |
2146 | return afinfo; |
2147 | } | |
2148 | ||
1da177e4 LT |
2149 | /* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */ |
2150 | void xfrm_state_delete_tunnel(struct xfrm_state *x) | |
2151 | { | |
2152 | if (x->tunnel) { | |
2153 | struct xfrm_state *t = x->tunnel; | |
2154 | ||
2155 | if (atomic_read(&t->tunnel_users) == 2) | |
2156 | xfrm_state_delete(t); | |
2157 | atomic_dec(&t->tunnel_users); | |
2158 | xfrm_state_put(t); | |
2159 | x->tunnel = NULL; | |
2160 | } | |
2161 | } | |
2162 | EXPORT_SYMBOL(xfrm_state_delete_tunnel); | |
2163 | ||
2164 | int xfrm_state_mtu(struct xfrm_state *x, int mtu) | |
2165 | { | |
b3b73b8e | 2166 | const struct xfrm_type *type = READ_ONCE(x->type); |
1da177e4 | 2167 | |
c5c25238 | 2168 | if (x->km.state == XFRM_STATE_VALID && |
b3b73b8e FW |
2169 | type && type->get_mtu) |
2170 | return type->get_mtu(x, mtu); | |
2171 | ||
2172 | return mtu - x->props.header_len; | |
1da177e4 LT |
2173 | } |
2174 | ||
a454f0cc | 2175 | int __xfrm_init_state(struct xfrm_state *x, bool init_replay) |
72cb6962 | 2176 | { |
d094cd83 | 2177 | struct xfrm_state_afinfo *afinfo; |
df9dcb45 | 2178 | struct xfrm_mode *inner_mode; |
d094cd83 | 2179 | int family = x->props.family; |
72cb6962 HX |
2180 | int err; |
2181 | ||
d094cd83 HX |
2182 | err = -EAFNOSUPPORT; |
2183 | afinfo = xfrm_state_get_afinfo(family); | |
2184 | if (!afinfo) | |
2185 | goto error; | |
2186 | ||
2187 | err = 0; | |
2188 | if (afinfo->init_flags) | |
2189 | err = afinfo->init_flags(x); | |
2190 | ||
af5d27c4 | 2191 | rcu_read_unlock(); |
d094cd83 HX |
2192 | |
2193 | if (err) | |
2194 | goto error; | |
2195 | ||
2196 | err = -EPROTONOSUPPORT; | |
13996378 | 2197 | |
df9dcb45 KM |
2198 | if (x->sel.family != AF_UNSPEC) { |
2199 | inner_mode = xfrm_get_mode(x->props.mode, x->sel.family); | |
2200 | if (inner_mode == NULL) | |
2201 | goto error; | |
2202 | ||
2203 | if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) && | |
2204 | family != x->sel.family) { | |
2205 | xfrm_put_mode(inner_mode); | |
2206 | goto error; | |
2207 | } | |
2208 | ||
2209 | x->inner_mode = inner_mode; | |
2210 | } else { | |
2211 | struct xfrm_mode *inner_mode_iaf; | |
d81d2285 | 2212 | int iafamily = AF_INET; |
df9dcb45 | 2213 | |
d81d2285 | 2214 | inner_mode = xfrm_get_mode(x->props.mode, x->props.family); |
df9dcb45 KM |
2215 | if (inner_mode == NULL) |
2216 | goto error; | |
2217 | ||
2218 | if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) { | |
2219 | xfrm_put_mode(inner_mode); | |
2220 | goto error; | |
2221 | } | |
d81d2285 | 2222 | x->inner_mode = inner_mode; |
df9dcb45 | 2223 | |
d81d2285 MW |
2224 | if (x->props.family == AF_INET) |
2225 | iafamily = AF_INET6; | |
df9dcb45 | 2226 | |
d81d2285 MW |
2227 | inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily); |
2228 | if (inner_mode_iaf) { | |
2229 | if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL) | |
2230 | x->inner_mode_iaf = inner_mode_iaf; | |
2231 | else | |
2232 | xfrm_put_mode(inner_mode_iaf); | |
df9dcb45 KM |
2233 | } |
2234 | } | |
13996378 | 2235 | |
d094cd83 | 2236 | x->type = xfrm_get_type(x->id.proto, family); |
72cb6962 HX |
2237 | if (x->type == NULL) |
2238 | goto error; | |
2239 | ||
9d389d7f SK |
2240 | x->type_offload = xfrm_get_type_offload(x->id.proto, family); |
2241 | ||
72cb6962 HX |
2242 | err = x->type->init_state(x); |
2243 | if (err) | |
2244 | goto error; | |
2245 | ||
13996378 | 2246 | x->outer_mode = xfrm_get_mode(x->props.mode, family); |
599901c3 JL |
2247 | if (x->outer_mode == NULL) { |
2248 | err = -EPROTONOSUPPORT; | |
b59f45d0 | 2249 | goto error; |
599901c3 | 2250 | } |
b59f45d0 | 2251 | |
a454f0cc WY |
2252 | if (init_replay) { |
2253 | err = xfrm_init_replay(x); | |
2254 | if (err) | |
2255 | goto error; | |
2256 | } | |
2257 | ||
72cb6962 HX |
2258 | x->km.state = XFRM_STATE_VALID; |
2259 | ||
2260 | error: | |
2261 | return err; | |
2262 | } | |
2263 | ||
a454f0cc WY |
2264 | EXPORT_SYMBOL(__xfrm_init_state); |
2265 | ||
2266 | int xfrm_init_state(struct xfrm_state *x) | |
2267 | { | |
2268 | return __xfrm_init_state(x, true); | |
2269 | } | |
2270 | ||
72cb6962 | 2271 | EXPORT_SYMBOL(xfrm_init_state); |
a716c119 | 2272 | |
d62ddc21 | 2273 | int __net_init xfrm_state_init(struct net *net) |
1da177e4 | 2274 | { |
f034b5d4 DM |
2275 | unsigned int sz; |
2276 | ||
9d4139c7 AD |
2277 | INIT_LIST_HEAD(&net->xfrm.state_all); |
2278 | ||
f034b5d4 DM |
2279 | sz = sizeof(struct hlist_head) * 8; |
2280 | ||
73d189dc AD |
2281 | net->xfrm.state_bydst = xfrm_hash_alloc(sz); |
2282 | if (!net->xfrm.state_bydst) | |
2283 | goto out_bydst; | |
d320bbb3 AD |
2284 | net->xfrm.state_bysrc = xfrm_hash_alloc(sz); |
2285 | if (!net->xfrm.state_bysrc) | |
2286 | goto out_bysrc; | |
b754a4fd AD |
2287 | net->xfrm.state_byspi = xfrm_hash_alloc(sz); |
2288 | if (!net->xfrm.state_byspi) | |
2289 | goto out_byspi; | |
529983ec | 2290 | net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1); |
1da177e4 | 2291 | |
0bf7c5b0 | 2292 | net->xfrm.state_num = 0; |
63082733 | 2293 | INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize); |
283bc9f3 | 2294 | spin_lock_init(&net->xfrm.xfrm_state_lock); |
d62ddc21 | 2295 | return 0; |
73d189dc | 2296 | |
b754a4fd AD |
2297 | out_byspi: |
2298 | xfrm_hash_free(net->xfrm.state_bysrc, sz); | |
d320bbb3 AD |
2299 | out_bysrc: |
2300 | xfrm_hash_free(net->xfrm.state_bydst, sz); | |
73d189dc AD |
2301 | out_bydst: |
2302 | return -ENOMEM; | |
d62ddc21 AD |
2303 | } |
2304 | ||
2305 | void xfrm_state_fini(struct net *net) | |
2306 | { | |
73d189dc AD |
2307 | unsigned int sz; |
2308 | ||
7c2776ee | 2309 | flush_work(&net->xfrm.state_hash_work); |
2e71029e | 2310 | xfrm_state_flush(net, IPSEC_PROTO_ANY, false); |
35db57bb | 2311 | flush_work(&xfrm_state_gc_work); |
7c2776ee | 2312 | |
9d4139c7 | 2313 | WARN_ON(!list_empty(&net->xfrm.state_all)); |
73d189dc | 2314 | |
529983ec | 2315 | sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head); |
b754a4fd AD |
2316 | WARN_ON(!hlist_empty(net->xfrm.state_byspi)); |
2317 | xfrm_hash_free(net->xfrm.state_byspi, sz); | |
d320bbb3 AD |
2318 | WARN_ON(!hlist_empty(net->xfrm.state_bysrc)); |
2319 | xfrm_hash_free(net->xfrm.state_bysrc, sz); | |
73d189dc AD |
2320 | WARN_ON(!hlist_empty(net->xfrm.state_bydst)); |
2321 | xfrm_hash_free(net->xfrm.state_bydst, sz); | |
1da177e4 LT |
2322 | } |
2323 | ||
ab5f5e8b | 2324 | #ifdef CONFIG_AUDITSYSCALL |
cf35f43e IJ |
2325 | static void xfrm_audit_helper_sainfo(struct xfrm_state *x, |
2326 | struct audit_buffer *audit_buf) | |
ab5f5e8b | 2327 | { |
68277acc PM |
2328 | struct xfrm_sec_ctx *ctx = x->security; |
2329 | u32 spi = ntohl(x->id.spi); | |
2330 | ||
2331 | if (ctx) | |
ab5f5e8b | 2332 | audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s", |
68277acc | 2333 | ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str); |
ab5f5e8b | 2334 | |
9b7a787d | 2335 | switch (x->props.family) { |
ab5f5e8b | 2336 | case AF_INET: |
21454aaa HH |
2337 | audit_log_format(audit_buf, " src=%pI4 dst=%pI4", |
2338 | &x->props.saddr.a4, &x->id.daddr.a4); | |
ab5f5e8b JL |
2339 | break; |
2340 | case AF_INET6: | |
5b095d98 | 2341 | audit_log_format(audit_buf, " src=%pI6 dst=%pI6", |
fdb46ee7 | 2342 | x->props.saddr.a6, x->id.daddr.a6); |
ab5f5e8b JL |
2343 | break; |
2344 | } | |
68277acc PM |
2345 | |
2346 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
ab5f5e8b JL |
2347 | } |
2348 | ||
cf35f43e IJ |
2349 | static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family, |
2350 | struct audit_buffer *audit_buf) | |
afeb14b4 | 2351 | { |
b71d1d42 ED |
2352 | const struct iphdr *iph4; |
2353 | const struct ipv6hdr *iph6; | |
afeb14b4 PM |
2354 | |
2355 | switch (family) { | |
2356 | case AF_INET: | |
2357 | iph4 = ip_hdr(skb); | |
21454aaa HH |
2358 | audit_log_format(audit_buf, " src=%pI4 dst=%pI4", |
2359 | &iph4->saddr, &iph4->daddr); | |
afeb14b4 PM |
2360 | break; |
2361 | case AF_INET6: | |
2362 | iph6 = ipv6_hdr(skb); | |
2363 | audit_log_format(audit_buf, | |
5b095d98 | 2364 | " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x", |
9b7a787d | 2365 | &iph6->saddr, &iph6->daddr, |
afeb14b4 PM |
2366 | iph6->flow_lbl[0] & 0x0f, |
2367 | iph6->flow_lbl[1], | |
2368 | iph6->flow_lbl[2]); | |
2369 | break; | |
2370 | } | |
2371 | } | |
2372 | ||
2e71029e | 2373 | void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid) |
ab5f5e8b JL |
2374 | { |
2375 | struct audit_buffer *audit_buf; | |
ab5f5e8b | 2376 | |
afeb14b4 | 2377 | audit_buf = xfrm_audit_start("SAD-add"); |
ab5f5e8b JL |
2378 | if (audit_buf == NULL) |
2379 | return; | |
2e71029e | 2380 | xfrm_audit_helper_usrinfo(task_valid, audit_buf); |
afeb14b4 PM |
2381 | xfrm_audit_helper_sainfo(x, audit_buf); |
2382 | audit_log_format(audit_buf, " res=%u", result); | |
ab5f5e8b JL |
2383 | audit_log_end(audit_buf); |
2384 | } | |
2385 | EXPORT_SYMBOL_GPL(xfrm_audit_state_add); | |
2386 | ||
2e71029e | 2387 | void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid) |
ab5f5e8b JL |
2388 | { |
2389 | struct audit_buffer *audit_buf; | |
ab5f5e8b | 2390 | |
afeb14b4 | 2391 | audit_buf = xfrm_audit_start("SAD-delete"); |
ab5f5e8b JL |
2392 | if (audit_buf == NULL) |
2393 | return; | |
2e71029e | 2394 | xfrm_audit_helper_usrinfo(task_valid, audit_buf); |
afeb14b4 PM |
2395 | xfrm_audit_helper_sainfo(x, audit_buf); |
2396 | audit_log_format(audit_buf, " res=%u", result); | |
ab5f5e8b JL |
2397 | audit_log_end(audit_buf); |
2398 | } | |
2399 | EXPORT_SYMBOL_GPL(xfrm_audit_state_delete); | |
afeb14b4 PM |
2400 | |
2401 | void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
2402 | struct sk_buff *skb) | |
2403 | { | |
2404 | struct audit_buffer *audit_buf; | |
2405 | u32 spi; | |
2406 | ||
2407 | audit_buf = xfrm_audit_start("SA-replay-overflow"); | |
2408 | if (audit_buf == NULL) | |
2409 | return; | |
2410 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2411 | /* don't record the sequence number because it's inherent in this kind | |
2412 | * of audit message */ | |
2413 | spi = ntohl(x->id.spi); | |
2414 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
2415 | audit_log_end(audit_buf); | |
2416 | } | |
2417 | EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow); | |
2418 | ||
9fdc4883 | 2419 | void xfrm_audit_state_replay(struct xfrm_state *x, |
afeb14b4 PM |
2420 | struct sk_buff *skb, __be32 net_seq) |
2421 | { | |
2422 | struct audit_buffer *audit_buf; | |
2423 | u32 spi; | |
2424 | ||
2425 | audit_buf = xfrm_audit_start("SA-replayed-pkt"); | |
2426 | if (audit_buf == NULL) | |
2427 | return; | |
2428 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2429 | spi = ntohl(x->id.spi); | |
2430 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2431 | spi, spi, ntohl(net_seq)); | |
2432 | audit_log_end(audit_buf); | |
2433 | } | |
9fdc4883 | 2434 | EXPORT_SYMBOL_GPL(xfrm_audit_state_replay); |
afeb14b4 PM |
2435 | |
2436 | void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family) | |
2437 | { | |
2438 | struct audit_buffer *audit_buf; | |
2439 | ||
2440 | audit_buf = xfrm_audit_start("SA-notfound"); | |
2441 | if (audit_buf == NULL) | |
2442 | return; | |
2443 | xfrm_audit_helper_pktinfo(skb, family, audit_buf); | |
2444 | audit_log_end(audit_buf); | |
2445 | } | |
2446 | EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple); | |
2447 | ||
2448 | void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
2449 | __be32 net_spi, __be32 net_seq) | |
2450 | { | |
2451 | struct audit_buffer *audit_buf; | |
2452 | u32 spi; | |
2453 | ||
2454 | audit_buf = xfrm_audit_start("SA-notfound"); | |
2455 | if (audit_buf == NULL) | |
2456 | return; | |
2457 | xfrm_audit_helper_pktinfo(skb, family, audit_buf); | |
2458 | spi = ntohl(net_spi); | |
2459 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2460 | spi, spi, ntohl(net_seq)); | |
2461 | audit_log_end(audit_buf); | |
2462 | } | |
2463 | EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound); | |
2464 | ||
2465 | void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
2466 | struct sk_buff *skb, u8 proto) | |
2467 | { | |
2468 | struct audit_buffer *audit_buf; | |
2469 | __be32 net_spi; | |
2470 | __be32 net_seq; | |
2471 | ||
2472 | audit_buf = xfrm_audit_start("SA-icv-failure"); | |
2473 | if (audit_buf == NULL) | |
2474 | return; | |
2475 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2476 | if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) { | |
2477 | u32 spi = ntohl(net_spi); | |
2478 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2479 | spi, spi, ntohl(net_seq)); | |
2480 | } | |
2481 | audit_log_end(audit_buf); | |
2482 | } | |
2483 | EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail); | |
ab5f5e8b | 2484 | #endif /* CONFIG_AUDITSYSCALL */ |