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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 | ||
ffdb5211 IT |
299 | static const struct xfrm_type_offload * |
300 | xfrm_get_type_offload(u8 proto, unsigned short family, bool try_load) | |
9d389d7f SK |
301 | { |
302 | struct xfrm_state_afinfo *afinfo; | |
303 | const struct xfrm_type_offload **typemap; | |
304 | const struct xfrm_type_offload *type; | |
305 | ||
ffdb5211 | 306 | retry: |
9d389d7f SK |
307 | afinfo = xfrm_state_get_afinfo(family); |
308 | if (unlikely(afinfo == NULL)) | |
309 | return NULL; | |
310 | typemap = afinfo->type_offload_map; | |
311 | ||
312 | type = typemap[proto]; | |
313 | if ((type && !try_module_get(type->owner))) | |
314 | type = NULL; | |
315 | ||
ffdb5211 IT |
316 | if (!type && try_load) { |
317 | request_module("xfrm-offload-%d-%d", family, proto); | |
318 | try_load = 0; | |
319 | goto retry; | |
320 | } | |
321 | ||
9d389d7f SK |
322 | rcu_read_unlock(); |
323 | return type; | |
324 | } | |
325 | ||
326 | static void xfrm_put_type_offload(const struct xfrm_type_offload *type) | |
327 | { | |
328 | module_put(type->owner); | |
329 | } | |
330 | ||
7a9885b9 | 331 | static DEFINE_SPINLOCK(xfrm_mode_lock); |
aa5d62cc HX |
332 | int xfrm_register_mode(struct xfrm_mode *mode, int family) |
333 | { | |
334 | struct xfrm_state_afinfo *afinfo; | |
335 | struct xfrm_mode **modemap; | |
336 | int err; | |
337 | ||
338 | if (unlikely(mode->encap >= XFRM_MODE_MAX)) | |
339 | return -EINVAL; | |
340 | ||
7a9885b9 | 341 | afinfo = xfrm_state_get_afinfo(family); |
aa5d62cc HX |
342 | if (unlikely(afinfo == NULL)) |
343 | return -EAFNOSUPPORT; | |
344 | ||
345 | err = -EEXIST; | |
346 | modemap = afinfo->mode_map; | |
7a9885b9 | 347 | spin_lock_bh(&xfrm_mode_lock); |
17c2a42a HX |
348 | if (modemap[mode->encap]) |
349 | goto out; | |
aa5d62cc | 350 | |
17c2a42a HX |
351 | err = -ENOENT; |
352 | if (!try_module_get(afinfo->owner)) | |
353 | goto out; | |
354 | ||
355 | mode->afinfo = afinfo; | |
356 | modemap[mode->encap] = mode; | |
357 | err = 0; | |
358 | ||
359 | out: | |
7a9885b9 | 360 | spin_unlock_bh(&xfrm_mode_lock); |
af5d27c4 | 361 | rcu_read_unlock(); |
aa5d62cc HX |
362 | return err; |
363 | } | |
364 | EXPORT_SYMBOL(xfrm_register_mode); | |
365 | ||
366 | int xfrm_unregister_mode(struct xfrm_mode *mode, int family) | |
367 | { | |
368 | struct xfrm_state_afinfo *afinfo; | |
369 | struct xfrm_mode **modemap; | |
370 | int err; | |
371 | ||
372 | if (unlikely(mode->encap >= XFRM_MODE_MAX)) | |
373 | return -EINVAL; | |
374 | ||
7a9885b9 | 375 | afinfo = xfrm_state_get_afinfo(family); |
aa5d62cc HX |
376 | if (unlikely(afinfo == NULL)) |
377 | return -EAFNOSUPPORT; | |
378 | ||
379 | err = -ENOENT; | |
380 | modemap = afinfo->mode_map; | |
7a9885b9 | 381 | spin_lock_bh(&xfrm_mode_lock); |
aa5d62cc HX |
382 | if (likely(modemap[mode->encap] == mode)) { |
383 | modemap[mode->encap] = NULL; | |
17c2a42a | 384 | module_put(mode->afinfo->owner); |
aa5d62cc HX |
385 | err = 0; |
386 | } | |
387 | ||
7a9885b9 | 388 | spin_unlock_bh(&xfrm_mode_lock); |
af5d27c4 | 389 | rcu_read_unlock(); |
aa5d62cc HX |
390 | return err; |
391 | } | |
392 | EXPORT_SYMBOL(xfrm_unregister_mode); | |
393 | ||
394 | static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family) | |
395 | { | |
396 | struct xfrm_state_afinfo *afinfo; | |
397 | struct xfrm_mode *mode; | |
398 | int modload_attempted = 0; | |
399 | ||
400 | if (unlikely(encap >= XFRM_MODE_MAX)) | |
401 | return NULL; | |
402 | ||
403 | retry: | |
404 | afinfo = xfrm_state_get_afinfo(family); | |
405 | if (unlikely(afinfo == NULL)) | |
406 | return NULL; | |
407 | ||
75cda62d | 408 | mode = READ_ONCE(afinfo->mode_map[encap]); |
aa5d62cc HX |
409 | if (unlikely(mode && !try_module_get(mode->owner))) |
410 | mode = NULL; | |
75cda62d FW |
411 | |
412 | rcu_read_unlock(); | |
aa5d62cc | 413 | if (!mode && !modload_attempted) { |
aa5d62cc HX |
414 | request_module("xfrm-mode-%d-%d", family, encap); |
415 | modload_attempted = 1; | |
416 | goto retry; | |
417 | } | |
418 | ||
aa5d62cc HX |
419 | return mode; |
420 | } | |
421 | ||
422 | static void xfrm_put_mode(struct xfrm_mode *mode) | |
423 | { | |
424 | module_put(mode->owner); | |
425 | } | |
426 | ||
1da177e4 LT |
427 | static void xfrm_state_gc_destroy(struct xfrm_state *x) |
428 | { | |
9e0d57fd | 429 | tasklet_hrtimer_cancel(&x->mtimer); |
a47f0ce0 | 430 | del_timer_sync(&x->rtimer); |
b5884793 | 431 | kfree(x->aead); |
a51482bd JJ |
432 | kfree(x->aalg); |
433 | kfree(x->ealg); | |
434 | kfree(x->calg); | |
435 | kfree(x->encap); | |
060f02a3 | 436 | kfree(x->coaddr); |
d8647b79 SK |
437 | kfree(x->replay_esn); |
438 | kfree(x->preplay_esn); | |
13996378 HX |
439 | if (x->inner_mode) |
440 | xfrm_put_mode(x->inner_mode); | |
df9dcb45 KM |
441 | if (x->inner_mode_iaf) |
442 | xfrm_put_mode(x->inner_mode_iaf); | |
13996378 HX |
443 | if (x->outer_mode) |
444 | xfrm_put_mode(x->outer_mode); | |
9d389d7f SK |
445 | if (x->type_offload) |
446 | xfrm_put_type_offload(x->type_offload); | |
1da177e4 LT |
447 | if (x->type) { |
448 | x->type->destructor(x); | |
449 | xfrm_put_type(x->type); | |
450 | } | |
d77e38e6 | 451 | xfrm_dev_state_free(x); |
df71837d | 452 | security_xfrm_state_free(x); |
1da177e4 LT |
453 | kfree(x); |
454 | } | |
455 | ||
c7837144 | 456 | static void xfrm_state_gc_task(struct work_struct *work) |
1da177e4 | 457 | { |
12a169e7 | 458 | struct xfrm_state *x; |
b67bfe0d | 459 | struct hlist_node *tmp; |
12a169e7 | 460 | struct hlist_head gc_list; |
1da177e4 | 461 | |
1da177e4 | 462 | spin_lock_bh(&xfrm_state_gc_lock); |
35db57bb | 463 | hlist_move_list(&xfrm_state_gc_list, &gc_list); |
1da177e4 LT |
464 | spin_unlock_bh(&xfrm_state_gc_lock); |
465 | ||
df7274eb FW |
466 | synchronize_rcu(); |
467 | ||
b67bfe0d | 468 | hlist_for_each_entry_safe(x, tmp, &gc_list, gclist) |
1da177e4 | 469 | xfrm_state_gc_destroy(x); |
1da177e4 LT |
470 | } |
471 | ||
3e94c2dc | 472 | static enum hrtimer_restart xfrm_timer_handler(struct hrtimer *me) |
1da177e4 | 473 | { |
9e0d57fd YP |
474 | struct tasklet_hrtimer *thr = container_of(me, struct tasklet_hrtimer, timer); |
475 | struct xfrm_state *x = container_of(thr, struct xfrm_state, mtimer); | |
9d729f72 | 476 | unsigned long now = get_seconds(); |
1da177e4 LT |
477 | long next = LONG_MAX; |
478 | int warn = 0; | |
161a09e7 | 479 | int err = 0; |
1da177e4 LT |
480 | |
481 | spin_lock(&x->lock); | |
482 | if (x->km.state == XFRM_STATE_DEAD) | |
483 | goto out; | |
484 | if (x->km.state == XFRM_STATE_EXPIRED) | |
485 | goto expired; | |
486 | if (x->lft.hard_add_expires_seconds) { | |
487 | long tmo = x->lft.hard_add_expires_seconds + | |
488 | x->curlft.add_time - now; | |
e3c0d047 FD |
489 | if (tmo <= 0) { |
490 | if (x->xflags & XFRM_SOFT_EXPIRE) { | |
491 | /* enter hard expire without soft expire first?! | |
492 | * setting a new date could trigger this. | |
1365e547 | 493 | * workaround: fix x->curflt.add_time by below: |
e3c0d047 FD |
494 | */ |
495 | x->curlft.add_time = now - x->saved_tmo - 1; | |
496 | tmo = x->lft.hard_add_expires_seconds - x->saved_tmo; | |
497 | } else | |
498 | goto expired; | |
499 | } | |
1da177e4 LT |
500 | if (tmo < next) |
501 | next = tmo; | |
502 | } | |
503 | if (x->lft.hard_use_expires_seconds) { | |
504 | long tmo = x->lft.hard_use_expires_seconds + | |
505 | (x->curlft.use_time ? : now) - now; | |
506 | if (tmo <= 0) | |
507 | goto expired; | |
508 | if (tmo < next) | |
509 | next = tmo; | |
510 | } | |
511 | if (x->km.dying) | |
512 | goto resched; | |
513 | if (x->lft.soft_add_expires_seconds) { | |
514 | long tmo = x->lft.soft_add_expires_seconds + | |
515 | x->curlft.add_time - now; | |
e3c0d047 | 516 | if (tmo <= 0) { |
1da177e4 | 517 | warn = 1; |
e3c0d047 FD |
518 | x->xflags &= ~XFRM_SOFT_EXPIRE; |
519 | } else if (tmo < next) { | |
1da177e4 | 520 | next = tmo; |
e3c0d047 FD |
521 | x->xflags |= XFRM_SOFT_EXPIRE; |
522 | x->saved_tmo = tmo; | |
523 | } | |
1da177e4 LT |
524 | } |
525 | if (x->lft.soft_use_expires_seconds) { | |
526 | long tmo = x->lft.soft_use_expires_seconds + | |
527 | (x->curlft.use_time ? : now) - now; | |
528 | if (tmo <= 0) | |
529 | warn = 1; | |
530 | else if (tmo < next) | |
531 | next = tmo; | |
532 | } | |
533 | ||
4666faab | 534 | x->km.dying = warn; |
1da177e4 | 535 | if (warn) |
53bc6b4d | 536 | km_state_expired(x, 0, 0); |
1da177e4 | 537 | resched: |
9b7a787d | 538 | if (next != LONG_MAX) { |
9e0d57fd YP |
539 | tasklet_hrtimer_start(&x->mtimer, ktime_set(next, 0), HRTIMER_MODE_REL); |
540 | } | |
a47f0ce0 | 541 | |
1da177e4 LT |
542 | goto out; |
543 | ||
544 | expired: | |
5b8ef341 | 545 | if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) |
1da177e4 | 546 | x->km.state = XFRM_STATE_EXPIRED; |
161a09e7 JL |
547 | |
548 | err = __xfrm_state_delete(x); | |
0806ae4c | 549 | if (!err) |
53bc6b4d | 550 | km_state_expired(x, 1, 0); |
1da177e4 | 551 | |
2e71029e | 552 | xfrm_audit_state_delete(x, err ? 0 : 1, true); |
161a09e7 | 553 | |
1da177e4 LT |
554 | out: |
555 | spin_unlock(&x->lock); | |
9e0d57fd | 556 | return HRTIMER_NORESTART; |
1da177e4 LT |
557 | } |
558 | ||
e99e88a9 | 559 | static void xfrm_replay_timer_handler(struct timer_list *t); |
0ac84752 | 560 | |
673c09be | 561 | struct xfrm_state *xfrm_state_alloc(struct net *net) |
1da177e4 LT |
562 | { |
563 | struct xfrm_state *x; | |
564 | ||
0da974f4 | 565 | x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC); |
1da177e4 LT |
566 | |
567 | if (x) { | |
673c09be | 568 | write_pnet(&x->xs_net, net); |
88755e9c | 569 | refcount_set(&x->refcnt, 1); |
1da177e4 | 570 | atomic_set(&x->tunnel_users, 0); |
12a169e7 | 571 | INIT_LIST_HEAD(&x->km.all); |
8f126e37 DM |
572 | INIT_HLIST_NODE(&x->bydst); |
573 | INIT_HLIST_NODE(&x->bysrc); | |
574 | INIT_HLIST_NODE(&x->byspi); | |
99565a6c FD |
575 | tasklet_hrtimer_init(&x->mtimer, xfrm_timer_handler, |
576 | CLOCK_BOOTTIME, HRTIMER_MODE_ABS); | |
e99e88a9 | 577 | timer_setup(&x->rtimer, xfrm_replay_timer_handler, 0); |
9d729f72 | 578 | x->curlft.add_time = get_seconds(); |
1da177e4 LT |
579 | x->lft.soft_byte_limit = XFRM_INF; |
580 | x->lft.soft_packet_limit = XFRM_INF; | |
581 | x->lft.hard_byte_limit = XFRM_INF; | |
582 | x->lft.hard_packet_limit = XFRM_INF; | |
f8cd5488 JHS |
583 | x->replay_maxage = 0; |
584 | x->replay_maxdiff = 0; | |
df9dcb45 KM |
585 | x->inner_mode = NULL; |
586 | x->inner_mode_iaf = NULL; | |
1da177e4 LT |
587 | spin_lock_init(&x->lock); |
588 | } | |
589 | return x; | |
590 | } | |
591 | EXPORT_SYMBOL(xfrm_state_alloc); | |
592 | ||
593 | void __xfrm_state_destroy(struct xfrm_state *x) | |
594 | { | |
547b792c | 595 | WARN_ON(x->km.state != XFRM_STATE_DEAD); |
1da177e4 LT |
596 | |
597 | spin_lock_bh(&xfrm_state_gc_lock); | |
35db57bb | 598 | hlist_add_head(&x->gclist, &xfrm_state_gc_list); |
1da177e4 | 599 | spin_unlock_bh(&xfrm_state_gc_lock); |
35db57bb | 600 | schedule_work(&xfrm_state_gc_work); |
1da177e4 LT |
601 | } |
602 | EXPORT_SYMBOL(__xfrm_state_destroy); | |
603 | ||
53bc6b4d | 604 | int __xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 605 | { |
98806f75 | 606 | struct net *net = xs_net(x); |
26b15dad JHS |
607 | int err = -ESRCH; |
608 | ||
1da177e4 LT |
609 | if (x->km.state != XFRM_STATE_DEAD) { |
610 | x->km.state = XFRM_STATE_DEAD; | |
283bc9f3 | 611 | spin_lock(&net->xfrm.xfrm_state_lock); |
12a169e7 | 612 | list_del(&x->km.all); |
ae3fb6d3 FW |
613 | hlist_del_rcu(&x->bydst); |
614 | hlist_del_rcu(&x->bysrc); | |
a47f0ce0 | 615 | if (x->id.spi) |
ae3fb6d3 | 616 | hlist_del_rcu(&x->byspi); |
98806f75 | 617 | net->xfrm.state_num--; |
283bc9f3 | 618 | spin_unlock(&net->xfrm.xfrm_state_lock); |
1da177e4 | 619 | |
d77e38e6 SK |
620 | xfrm_dev_state_delete(x); |
621 | ||
1da177e4 LT |
622 | /* All xfrm_state objects are created by xfrm_state_alloc. |
623 | * The xfrm_state_alloc call gives a reference, and that | |
624 | * is what we are dropping here. | |
625 | */ | |
5dba4797 | 626 | xfrm_state_put(x); |
26b15dad | 627 | err = 0; |
1da177e4 | 628 | } |
26b15dad JHS |
629 | |
630 | return err; | |
1da177e4 | 631 | } |
53bc6b4d | 632 | EXPORT_SYMBOL(__xfrm_state_delete); |
1da177e4 | 633 | |
26b15dad | 634 | int xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 635 | { |
26b15dad JHS |
636 | int err; |
637 | ||
1da177e4 | 638 | spin_lock_bh(&x->lock); |
26b15dad | 639 | err = __xfrm_state_delete(x); |
1da177e4 | 640 | spin_unlock_bh(&x->lock); |
26b15dad JHS |
641 | |
642 | return err; | |
1da177e4 LT |
643 | } |
644 | EXPORT_SYMBOL(xfrm_state_delete); | |
645 | ||
4aa2e62c JL |
646 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
647 | static inline int | |
2e71029e | 648 | xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid) |
1da177e4 | 649 | { |
4aa2e62c JL |
650 | int i, err = 0; |
651 | ||
0e602451 | 652 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
4aa2e62c JL |
653 | struct xfrm_state *x; |
654 | ||
b67bfe0d | 655 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
4aa2e62c JL |
656 | if (xfrm_id_proto_match(x->id.proto, proto) && |
657 | (err = security_xfrm_state_delete(x)) != 0) { | |
2e71029e | 658 | xfrm_audit_state_delete(x, 0, task_valid); |
4aa2e62c JL |
659 | return err; |
660 | } | |
661 | } | |
662 | } | |
663 | ||
664 | return err; | |
665 | } | |
d77e38e6 SK |
666 | |
667 | static inline int | |
668 | xfrm_dev_state_flush_secctx_check(struct net *net, struct net_device *dev, bool task_valid) | |
669 | { | |
670 | int i, err = 0; | |
671 | ||
672 | for (i = 0; i <= net->xfrm.state_hmask; i++) { | |
673 | struct xfrm_state *x; | |
674 | struct xfrm_state_offload *xso; | |
675 | ||
676 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { | |
677 | xso = &x->xso; | |
678 | ||
679 | if (xso->dev == dev && | |
680 | (err = security_xfrm_state_delete(x)) != 0) { | |
681 | xfrm_audit_state_delete(x, 0, task_valid); | |
682 | return err; | |
683 | } | |
684 | } | |
685 | } | |
686 | ||
687 | return err; | |
688 | } | |
4aa2e62c JL |
689 | #else |
690 | static inline int | |
2e71029e | 691 | xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid) |
4aa2e62c JL |
692 | { |
693 | return 0; | |
694 | } | |
d77e38e6 SK |
695 | |
696 | static inline int | |
697 | xfrm_dev_state_flush_secctx_check(struct net *net, struct net_device *dev, bool task_valid) | |
698 | { | |
699 | return 0; | |
700 | } | |
4aa2e62c JL |
701 | #endif |
702 | ||
2e71029e | 703 | int xfrm_state_flush(struct net *net, u8 proto, bool task_valid) |
4aa2e62c | 704 | { |
9e64cc95 | 705 | int i, err = 0, cnt = 0; |
1da177e4 | 706 | |
283bc9f3 | 707 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
2e71029e | 708 | err = xfrm_state_flush_secctx_check(net, proto, task_valid); |
4aa2e62c JL |
709 | if (err) |
710 | goto out; | |
711 | ||
9e64cc95 | 712 | err = -ESRCH; |
0e602451 | 713 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
8f126e37 | 714 | struct xfrm_state *x; |
1da177e4 | 715 | restart: |
b67bfe0d | 716 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
1da177e4 | 717 | if (!xfrm_state_kern(x) && |
5794708f | 718 | xfrm_id_proto_match(x->id.proto, proto)) { |
1da177e4 | 719 | xfrm_state_hold(x); |
283bc9f3 | 720 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 721 | |
161a09e7 | 722 | err = xfrm_state_delete(x); |
ab5f5e8b | 723 | xfrm_audit_state_delete(x, err ? 0 : 1, |
2e71029e | 724 | task_valid); |
1da177e4 | 725 | xfrm_state_put(x); |
9e64cc95 JHS |
726 | if (!err) |
727 | cnt++; | |
1da177e4 | 728 | |
283bc9f3 | 729 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
730 | goto restart; |
731 | } | |
732 | } | |
733 | } | |
dd269db8 AS |
734 | out: |
735 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); | |
ec30d78c | 736 | if (cnt) { |
9e64cc95 | 737 | err = 0; |
ec30d78c FW |
738 | xfrm_policy_cache_flush(); |
739 | } | |
4aa2e62c | 740 | return err; |
1da177e4 LT |
741 | } |
742 | EXPORT_SYMBOL(xfrm_state_flush); | |
743 | ||
d77e38e6 SK |
744 | int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid) |
745 | { | |
746 | int i, err = 0, cnt = 0; | |
747 | ||
748 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
749 | err = xfrm_dev_state_flush_secctx_check(net, dev, task_valid); | |
750 | if (err) | |
751 | goto out; | |
752 | ||
753 | err = -ESRCH; | |
754 | for (i = 0; i <= net->xfrm.state_hmask; i++) { | |
755 | struct xfrm_state *x; | |
756 | struct xfrm_state_offload *xso; | |
757 | restart: | |
758 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { | |
759 | xso = &x->xso; | |
760 | ||
761 | if (!xfrm_state_kern(x) && xso->dev == dev) { | |
762 | xfrm_state_hold(x); | |
763 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); | |
764 | ||
765 | err = xfrm_state_delete(x); | |
766 | xfrm_audit_state_delete(x, err ? 0 : 1, | |
767 | task_valid); | |
768 | xfrm_state_put(x); | |
769 | if (!err) | |
770 | cnt++; | |
771 | ||
772 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
773 | goto restart; | |
774 | } | |
775 | } | |
776 | } | |
777 | if (cnt) | |
778 | err = 0; | |
779 | ||
780 | out: | |
781 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); | |
782 | return err; | |
783 | } | |
784 | EXPORT_SYMBOL(xfrm_dev_state_flush); | |
785 | ||
e071041b | 786 | void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si) |
28d8909b | 787 | { |
283bc9f3 | 788 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
e071041b AD |
789 | si->sadcnt = net->xfrm.state_num; |
790 | si->sadhcnt = net->xfrm.state_hmask; | |
28d8909b | 791 | si->sadhmcnt = xfrm_state_hashmax; |
283bc9f3 | 792 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
28d8909b JHS |
793 | } |
794 | EXPORT_SYMBOL(xfrm_sad_getinfo); | |
795 | ||
711059b9 | 796 | static void |
1a898592 | 797 | xfrm_init_tempstate(struct xfrm_state *x, const struct flowi *fl, |
04686013 | 798 | const struct xfrm_tmpl *tmpl, |
33765d06 | 799 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
8444cf71 | 800 | unsigned short family) |
1da177e4 | 801 | { |
711059b9 FW |
802 | struct xfrm_state_afinfo *afinfo = xfrm_state_afinfo_get_rcu(family); |
803 | ||
3819a35f FW |
804 | if (!afinfo) |
805 | return; | |
806 | ||
807 | afinfo->init_tempsel(&x->sel, fl); | |
8444cf71 TE |
808 | |
809 | if (family != tmpl->encap_family) { | |
711059b9 | 810 | afinfo = xfrm_state_afinfo_get_rcu(tmpl->encap_family); |
8444cf71 | 811 | if (!afinfo) |
711059b9 | 812 | return; |
8444cf71 TE |
813 | } |
814 | afinfo->init_temprop(x, tmpl, daddr, saddr); | |
1da177e4 LT |
815 | } |
816 | ||
9aa60088 DM |
817 | static struct xfrm_state *__xfrm_state_lookup(struct net *net, u32 mark, |
818 | const xfrm_address_t *daddr, | |
819 | __be32 spi, u8 proto, | |
820 | unsigned short family) | |
edcd5821 | 821 | { |
221df1ed | 822 | unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family); |
edcd5821 DM |
823 | struct xfrm_state *x; |
824 | ||
ae3fb6d3 | 825 | hlist_for_each_entry_rcu(x, net->xfrm.state_byspi + h, byspi) { |
edcd5821 DM |
826 | if (x->props.family != family || |
827 | x->id.spi != spi || | |
1802571b | 828 | x->id.proto != proto || |
70e94e66 | 829 | !xfrm_addr_equal(&x->id.daddr, daddr, family)) |
edcd5821 DM |
830 | continue; |
831 | ||
3d6acfa7 JHS |
832 | if ((mark & x->mark.m) != x->mark.v) |
833 | continue; | |
02efdff7 FW |
834 | if (!xfrm_state_hold_rcu(x)) |
835 | continue; | |
edcd5821 DM |
836 | return x; |
837 | } | |
838 | ||
839 | return NULL; | |
840 | } | |
841 | ||
9aa60088 DM |
842 | static struct xfrm_state *__xfrm_state_lookup_byaddr(struct net *net, u32 mark, |
843 | const xfrm_address_t *daddr, | |
844 | const xfrm_address_t *saddr, | |
845 | u8 proto, unsigned short family) | |
edcd5821 | 846 | { |
221df1ed | 847 | unsigned int h = xfrm_src_hash(net, daddr, saddr, family); |
edcd5821 DM |
848 | struct xfrm_state *x; |
849 | ||
ae3fb6d3 | 850 | hlist_for_each_entry_rcu(x, net->xfrm.state_bysrc + h, bysrc) { |
edcd5821 | 851 | if (x->props.family != family || |
1802571b | 852 | x->id.proto != proto || |
70e94e66 YH |
853 | !xfrm_addr_equal(&x->id.daddr, daddr, family) || |
854 | !xfrm_addr_equal(&x->props.saddr, saddr, family)) | |
edcd5821 DM |
855 | continue; |
856 | ||
3d6acfa7 JHS |
857 | if ((mark & x->mark.m) != x->mark.v) |
858 | continue; | |
02efdff7 FW |
859 | if (!xfrm_state_hold_rcu(x)) |
860 | continue; | |
edcd5821 DM |
861 | return x; |
862 | } | |
863 | ||
864 | return NULL; | |
865 | } | |
866 | ||
867 | static inline struct xfrm_state * | |
868 | __xfrm_state_locate(struct xfrm_state *x, int use_spi, int family) | |
869 | { | |
221df1ed | 870 | struct net *net = xs_net(x); |
bd55775c | 871 | u32 mark = x->mark.v & x->mark.m; |
221df1ed | 872 | |
edcd5821 | 873 | if (use_spi) |
bd55775c JHS |
874 | return __xfrm_state_lookup(net, mark, &x->id.daddr, |
875 | x->id.spi, x->id.proto, family); | |
edcd5821 | 876 | else |
bd55775c JHS |
877 | return __xfrm_state_lookup_byaddr(net, mark, |
878 | &x->id.daddr, | |
edcd5821 DM |
879 | &x->props.saddr, |
880 | x->id.proto, family); | |
881 | } | |
882 | ||
98806f75 | 883 | static void xfrm_hash_grow_check(struct net *net, int have_hash_collision) |
2fab22f2 PM |
884 | { |
885 | if (have_hash_collision && | |
98806f75 AD |
886 | (net->xfrm.state_hmask + 1) < xfrm_state_hashmax && |
887 | net->xfrm.state_num > net->xfrm.state_hmask) | |
888 | schedule_work(&net->xfrm.state_hash_work); | |
2fab22f2 PM |
889 | } |
890 | ||
08ec9af1 | 891 | static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x, |
4a08ab0f | 892 | const struct flowi *fl, unsigned short family, |
08ec9af1 DM |
893 | struct xfrm_state **best, int *acq_in_progress, |
894 | int *error) | |
895 | { | |
896 | /* Resolution logic: | |
897 | * 1. There is a valid state with matching selector. Done. | |
898 | * 2. Valid state with inappropriate selector. Skip. | |
899 | * | |
900 | * Entering area of "sysdeps". | |
901 | * | |
902 | * 3. If state is not valid, selector is temporary, it selects | |
903 | * only session which triggered previous resolution. Key | |
904 | * manager will do something to install a state with proper | |
905 | * selector. | |
906 | */ | |
907 | if (x->km.state == XFRM_STATE_VALID) { | |
908 | if ((x->sel.family && | |
909 | !xfrm_selector_match(&x->sel, fl, x->sel.family)) || | |
910 | !security_xfrm_state_pol_flow_match(x, pol, fl)) | |
911 | return; | |
912 | ||
913 | if (!*best || | |
914 | (*best)->km.dying > x->km.dying || | |
915 | ((*best)->km.dying == x->km.dying && | |
916 | (*best)->curlft.add_time < x->curlft.add_time)) | |
917 | *best = x; | |
918 | } else if (x->km.state == XFRM_STATE_ACQ) { | |
919 | *acq_in_progress = 1; | |
920 | } else if (x->km.state == XFRM_STATE_ERROR || | |
921 | x->km.state == XFRM_STATE_EXPIRED) { | |
922 | if (xfrm_selector_match(&x->sel, fl, x->sel.family) && | |
923 | security_xfrm_state_pol_flow_match(x, pol, fl)) | |
924 | *error = -ESRCH; | |
925 | } | |
926 | } | |
927 | ||
1da177e4 | 928 | struct xfrm_state * |
33765d06 | 929 | xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
b520e9f6 | 930 | const struct flowi *fl, struct xfrm_tmpl *tmpl, |
1da177e4 LT |
931 | struct xfrm_policy *pol, int *err, |
932 | unsigned short family) | |
933 | { | |
08ec9af1 | 934 | static xfrm_address_t saddr_wildcard = { }; |
5447c5e4 | 935 | struct net *net = xp_net(pol); |
6a783c90 | 936 | unsigned int h, h_wildcard; |
37b08e34 | 937 | struct xfrm_state *x, *x0, *to_put; |
1da177e4 LT |
938 | int acquire_in_progress = 0; |
939 | int error = 0; | |
940 | struct xfrm_state *best = NULL; | |
bd55775c | 941 | u32 mark = pol->mark.v & pol->mark.m; |
8444cf71 | 942 | unsigned short encap_family = tmpl->encap_family; |
b65e3d7b | 943 | unsigned int sequence; |
0f24558e | 944 | struct km_event c; |
a716c119 | 945 | |
37b08e34 DM |
946 | to_put = NULL; |
947 | ||
b65e3d7b FW |
948 | sequence = read_seqcount_begin(&xfrm_state_hash_generation); |
949 | ||
d737a580 | 950 | rcu_read_lock(); |
8444cf71 | 951 | h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family); |
ae3fb6d3 | 952 | hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h, bydst) { |
8444cf71 | 953 | if (x->props.family == encap_family && |
1da177e4 | 954 | x->props.reqid == tmpl->reqid && |
3d6acfa7 | 955 | (mark & x->mark.m) == x->mark.v && |
fbd9a5b4 | 956 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
8444cf71 | 957 | xfrm_state_addr_check(x, daddr, saddr, encap_family) && |
1da177e4 LT |
958 | tmpl->mode == x->props.mode && |
959 | tmpl->id.proto == x->id.proto && | |
08ec9af1 | 960 | (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) |
1f673c5f | 961 | xfrm_state_look_at(pol, x, fl, encap_family, |
08ec9af1 DM |
962 | &best, &acquire_in_progress, &error); |
963 | } | |
6f115638 | 964 | if (best || acquire_in_progress) |
08ec9af1 DM |
965 | goto found; |
966 | ||
8444cf71 | 967 | h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, encap_family); |
ae3fb6d3 | 968 | hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h_wildcard, bydst) { |
8444cf71 | 969 | if (x->props.family == encap_family && |
08ec9af1 | 970 | x->props.reqid == tmpl->reqid && |
3d6acfa7 | 971 | (mark & x->mark.m) == x->mark.v && |
08ec9af1 | 972 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
f59bbdfa | 973 | xfrm_addr_equal(&x->id.daddr, daddr, encap_family) && |
08ec9af1 DM |
974 | tmpl->mode == x->props.mode && |
975 | tmpl->id.proto == x->id.proto && | |
976 | (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) | |
1f673c5f | 977 | xfrm_state_look_at(pol, x, fl, encap_family, |
08ec9af1 | 978 | &best, &acquire_in_progress, &error); |
1da177e4 LT |
979 | } |
980 | ||
08ec9af1 | 981 | found: |
1da177e4 LT |
982 | x = best; |
983 | if (!x && !error && !acquire_in_progress) { | |
5c5d281a | 984 | if (tmpl->id.spi && |
bd55775c | 985 | (x0 = __xfrm_state_lookup(net, mark, daddr, tmpl->id.spi, |
8444cf71 | 986 | tmpl->id.proto, encap_family)) != NULL) { |
37b08e34 | 987 | to_put = x0; |
1da177e4 LT |
988 | error = -EEXIST; |
989 | goto out; | |
990 | } | |
0f24558e HG |
991 | |
992 | c.net = net; | |
993 | /* If the KMs have no listeners (yet...), avoid allocating an SA | |
994 | * for each and every packet - garbage collection might not | |
995 | * handle the flood. | |
996 | */ | |
997 | if (!km_is_alive(&c)) { | |
998 | error = -ESRCH; | |
999 | goto out; | |
1000 | } | |
1001 | ||
5447c5e4 | 1002 | x = xfrm_state_alloc(net); |
1da177e4 LT |
1003 | if (x == NULL) { |
1004 | error = -ENOMEM; | |
1005 | goto out; | |
1006 | } | |
8444cf71 | 1007 | /* Initialize temporary state matching only |
1da177e4 | 1008 | * to current session. */ |
8444cf71 | 1009 | xfrm_init_tempstate(x, fl, tmpl, daddr, saddr, family); |
bd55775c | 1010 | memcpy(&x->mark, &pol->mark, sizeof(x->mark)); |
1da177e4 | 1011 | |
1d28f42c | 1012 | error = security_xfrm_state_alloc_acquire(x, pol->security, fl->flowi_secid); |
e0d1caa7 VY |
1013 | if (error) { |
1014 | x->km.state = XFRM_STATE_DEAD; | |
37b08e34 | 1015 | to_put = x; |
e0d1caa7 VY |
1016 | x = NULL; |
1017 | goto out; | |
1018 | } | |
1019 | ||
1da177e4 | 1020 | if (km_query(x, tmpl, pol) == 0) { |
d737a580 | 1021 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 1022 | x->km.state = XFRM_STATE_ACQ; |
5447c5e4 | 1023 | list_add(&x->km.all, &net->xfrm.state_all); |
ae3fb6d3 | 1024 | hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h); |
8444cf71 | 1025 | h = xfrm_src_hash(net, daddr, saddr, encap_family); |
ae3fb6d3 | 1026 | hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h); |
1da177e4 | 1027 | if (x->id.spi) { |
8444cf71 | 1028 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, encap_family); |
ae3fb6d3 | 1029 | hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h); |
1da177e4 | 1030 | } |
b27aeadb | 1031 | x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires; |
9e0d57fd | 1032 | tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL); |
5447c5e4 AD |
1033 | net->xfrm.state_num++; |
1034 | xfrm_hash_grow_check(net, x->bydst.next != NULL); | |
d737a580 | 1035 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1036 | } else { |
1037 | x->km.state = XFRM_STATE_DEAD; | |
37b08e34 | 1038 | to_put = x; |
1da177e4 LT |
1039 | x = NULL; |
1040 | error = -ESRCH; | |
1041 | } | |
1042 | } | |
1043 | out: | |
02efdff7 FW |
1044 | if (x) { |
1045 | if (!xfrm_state_hold_rcu(x)) { | |
1046 | *err = -EAGAIN; | |
1047 | x = NULL; | |
1048 | } | |
1049 | } else { | |
1da177e4 | 1050 | *err = acquire_in_progress ? -EAGAIN : error; |
02efdff7 | 1051 | } |
d737a580 | 1052 | rcu_read_unlock(); |
37b08e34 DM |
1053 | if (to_put) |
1054 | xfrm_state_put(to_put); | |
b65e3d7b FW |
1055 | |
1056 | if (read_seqcount_retry(&xfrm_state_hash_generation, sequence)) { | |
1057 | *err = -EAGAIN; | |
1058 | if (x) { | |
1059 | xfrm_state_put(x); | |
1060 | x = NULL; | |
1061 | } | |
1062 | } | |
1063 | ||
1da177e4 LT |
1064 | return x; |
1065 | } | |
1066 | ||
628529b6 | 1067 | struct xfrm_state * |
bd55775c | 1068 | xfrm_stateonly_find(struct net *net, u32 mark, |
5447c5e4 | 1069 | xfrm_address_t *daddr, xfrm_address_t *saddr, |
628529b6 JHS |
1070 | unsigned short family, u8 mode, u8 proto, u32 reqid) |
1071 | { | |
4bda4f25 | 1072 | unsigned int h; |
628529b6 | 1073 | struct xfrm_state *rx = NULL, *x = NULL; |
628529b6 | 1074 | |
4ae770bf | 1075 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
5447c5e4 | 1076 | h = xfrm_dst_hash(net, daddr, saddr, reqid, family); |
b67bfe0d | 1077 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
628529b6 JHS |
1078 | if (x->props.family == family && |
1079 | x->props.reqid == reqid && | |
3d6acfa7 | 1080 | (mark & x->mark.m) == x->mark.v && |
628529b6 JHS |
1081 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
1082 | xfrm_state_addr_check(x, daddr, saddr, family) && | |
1083 | mode == x->props.mode && | |
1084 | proto == x->id.proto && | |
1085 | x->km.state == XFRM_STATE_VALID) { | |
1086 | rx = x; | |
1087 | break; | |
1088 | } | |
1089 | } | |
1090 | ||
1091 | if (rx) | |
1092 | xfrm_state_hold(rx); | |
4ae770bf | 1093 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
628529b6 JHS |
1094 | |
1095 | ||
1096 | return rx; | |
1097 | } | |
1098 | EXPORT_SYMBOL(xfrm_stateonly_find); | |
1099 | ||
c454997e FD |
1100 | struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi, |
1101 | unsigned short family) | |
1102 | { | |
1103 | struct xfrm_state *x; | |
1104 | struct xfrm_state_walk *w; | |
1105 | ||
1106 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
1107 | list_for_each_entry(w, &net->xfrm.state_all, all) { | |
1108 | x = container_of(w, struct xfrm_state, km); | |
1109 | if (x->props.family != family || | |
1110 | x->id.spi != spi) | |
1111 | continue; | |
1112 | ||
c454997e | 1113 | xfrm_state_hold(x); |
bdddbf69 | 1114 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
c454997e FD |
1115 | return x; |
1116 | } | |
1117 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); | |
1118 | return NULL; | |
1119 | } | |
1120 | EXPORT_SYMBOL(xfrm_state_lookup_byspi); | |
1121 | ||
1da177e4 LT |
1122 | static void __xfrm_state_insert(struct xfrm_state *x) |
1123 | { | |
98806f75 | 1124 | struct net *net = xs_net(x); |
a624c108 | 1125 | unsigned int h; |
1da177e4 | 1126 | |
98806f75 | 1127 | list_add(&x->km.all, &net->xfrm.state_all); |
4c563f76 | 1128 | |
98806f75 | 1129 | h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr, |
c1969f29 | 1130 | x->props.reqid, x->props.family); |
ae3fb6d3 | 1131 | hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h); |
1da177e4 | 1132 | |
98806f75 | 1133 | h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family); |
ae3fb6d3 | 1134 | hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h); |
1da177e4 | 1135 | |
7b4dc360 | 1136 | if (x->id.spi) { |
98806f75 | 1137 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, |
6c44e6b7 MN |
1138 | x->props.family); |
1139 | ||
ae3fb6d3 | 1140 | hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h); |
6c44e6b7 MN |
1141 | } |
1142 | ||
9e0d57fd | 1143 | tasklet_hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL); |
a47f0ce0 DM |
1144 | if (x->replay_maxage) |
1145 | mod_timer(&x->rtimer, jiffies + x->replay_maxage); | |
f8cd5488 | 1146 | |
98806f75 | 1147 | net->xfrm.state_num++; |
f034b5d4 | 1148 | |
98806f75 | 1149 | xfrm_hash_grow_check(net, x->bydst.next != NULL); |
1da177e4 LT |
1150 | } |
1151 | ||
283bc9f3 | 1152 | /* net->xfrm.xfrm_state_lock is held */ |
c7f5ea3a DM |
1153 | static void __xfrm_state_bump_genids(struct xfrm_state *xnew) |
1154 | { | |
98806f75 | 1155 | struct net *net = xs_net(xnew); |
c7f5ea3a DM |
1156 | unsigned short family = xnew->props.family; |
1157 | u32 reqid = xnew->props.reqid; | |
1158 | struct xfrm_state *x; | |
c7f5ea3a | 1159 | unsigned int h; |
3d6acfa7 | 1160 | u32 mark = xnew->mark.v & xnew->mark.m; |
c7f5ea3a | 1161 | |
98806f75 | 1162 | h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family); |
b67bfe0d | 1163 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
c7f5ea3a DM |
1164 | if (x->props.family == family && |
1165 | x->props.reqid == reqid && | |
3d6acfa7 | 1166 | (mark & x->mark.m) == x->mark.v && |
70e94e66 YH |
1167 | xfrm_addr_equal(&x->id.daddr, &xnew->id.daddr, family) && |
1168 | xfrm_addr_equal(&x->props.saddr, &xnew->props.saddr, family)) | |
34996cb9 | 1169 | x->genid++; |
c7f5ea3a DM |
1170 | } |
1171 | } | |
1172 | ||
1da177e4 LT |
1173 | void xfrm_state_insert(struct xfrm_state *x) |
1174 | { | |
283bc9f3 FD |
1175 | struct net *net = xs_net(x); |
1176 | ||
1177 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
c7f5ea3a | 1178 | __xfrm_state_bump_genids(x); |
1da177e4 | 1179 | __xfrm_state_insert(x); |
283bc9f3 | 1180 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1181 | } |
1182 | EXPORT_SYMBOL(xfrm_state_insert); | |
1183 | ||
283bc9f3 | 1184 | /* net->xfrm.xfrm_state_lock is held */ |
e473fcb4 MK |
1185 | static struct xfrm_state *__find_acq_core(struct net *net, |
1186 | const struct xfrm_mark *m, | |
a70486f0 DM |
1187 | unsigned short family, u8 mode, |
1188 | u32 reqid, u8 proto, | |
1189 | const xfrm_address_t *daddr, | |
e473fcb4 MK |
1190 | const xfrm_address_t *saddr, |
1191 | int create) | |
2770834c | 1192 | { |
5447c5e4 | 1193 | unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family); |
2770834c | 1194 | struct xfrm_state *x; |
3d6acfa7 | 1195 | u32 mark = m->v & m->m; |
2770834c | 1196 | |
b67bfe0d | 1197 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
2770834c DM |
1198 | if (x->props.reqid != reqid || |
1199 | x->props.mode != mode || | |
1200 | x->props.family != family || | |
1201 | x->km.state != XFRM_STATE_ACQ || | |
75e252d9 | 1202 | x->id.spi != 0 || |
1802571b | 1203 | x->id.proto != proto || |
3d6acfa7 | 1204 | (mark & x->mark.m) != x->mark.v || |
70e94e66 YH |
1205 | !xfrm_addr_equal(&x->id.daddr, daddr, family) || |
1206 | !xfrm_addr_equal(&x->props.saddr, saddr, family)) | |
2770834c DM |
1207 | continue; |
1208 | ||
2770834c DM |
1209 | xfrm_state_hold(x); |
1210 | return x; | |
1211 | } | |
1212 | ||
1213 | if (!create) | |
1214 | return NULL; | |
1215 | ||
5447c5e4 | 1216 | x = xfrm_state_alloc(net); |
2770834c DM |
1217 | if (likely(x)) { |
1218 | switch (family) { | |
1219 | case AF_INET: | |
1220 | x->sel.daddr.a4 = daddr->a4; | |
1221 | x->sel.saddr.a4 = saddr->a4; | |
1222 | x->sel.prefixlen_d = 32; | |
1223 | x->sel.prefixlen_s = 32; | |
1224 | x->props.saddr.a4 = saddr->a4; | |
1225 | x->id.daddr.a4 = daddr->a4; | |
1226 | break; | |
1227 | ||
1228 | case AF_INET6: | |
15e318bd JB |
1229 | x->sel.daddr.in6 = daddr->in6; |
1230 | x->sel.saddr.in6 = saddr->in6; | |
2770834c DM |
1231 | x->sel.prefixlen_d = 128; |
1232 | x->sel.prefixlen_s = 128; | |
15e318bd JB |
1233 | x->props.saddr.in6 = saddr->in6; |
1234 | x->id.daddr.in6 = daddr->in6; | |
2770834c | 1235 | break; |
3ff50b79 | 1236 | } |
2770834c DM |
1237 | |
1238 | x->km.state = XFRM_STATE_ACQ; | |
1239 | x->id.proto = proto; | |
1240 | x->props.family = family; | |
1241 | x->props.mode = mode; | |
1242 | x->props.reqid = reqid; | |
bd55775c JHS |
1243 | x->mark.v = m->v; |
1244 | x->mark.m = m->m; | |
b27aeadb | 1245 | x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires; |
2770834c | 1246 | xfrm_state_hold(x); |
9e0d57fd | 1247 | tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL); |
5447c5e4 | 1248 | list_add(&x->km.all, &net->xfrm.state_all); |
ae3fb6d3 | 1249 | hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h); |
5447c5e4 | 1250 | h = xfrm_src_hash(net, daddr, saddr, family); |
ae3fb6d3 | 1251 | hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h); |
918049f0 | 1252 | |
5447c5e4 | 1253 | net->xfrm.state_num++; |
918049f0 | 1254 | |
5447c5e4 | 1255 | xfrm_hash_grow_check(net, x->bydst.next != NULL); |
2770834c DM |
1256 | } |
1257 | ||
1258 | return x; | |
1259 | } | |
1260 | ||
bd55775c | 1261 | static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); |
1da177e4 LT |
1262 | |
1263 | int xfrm_state_add(struct xfrm_state *x) | |
1264 | { | |
5447c5e4 | 1265 | struct net *net = xs_net(x); |
37b08e34 | 1266 | struct xfrm_state *x1, *to_put; |
1da177e4 LT |
1267 | int family; |
1268 | int err; | |
bd55775c | 1269 | u32 mark = x->mark.v & x->mark.m; |
eb2971b6 | 1270 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
1da177e4 LT |
1271 | |
1272 | family = x->props.family; | |
1da177e4 | 1273 | |
37b08e34 DM |
1274 | to_put = NULL; |
1275 | ||
283bc9f3 | 1276 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 1277 | |
edcd5821 | 1278 | x1 = __xfrm_state_locate(x, use_spi, family); |
1da177e4 | 1279 | if (x1) { |
37b08e34 | 1280 | to_put = x1; |
1da177e4 LT |
1281 | x1 = NULL; |
1282 | err = -EEXIST; | |
1283 | goto out; | |
1284 | } | |
1285 | ||
eb2971b6 | 1286 | if (use_spi && x->km.seq) { |
bd55775c | 1287 | x1 = __xfrm_find_acq_byseq(net, mark, x->km.seq); |
75e252d9 | 1288 | if (x1 && ((x1->id.proto != x->id.proto) || |
70e94e66 | 1289 | !xfrm_addr_equal(&x1->id.daddr, &x->id.daddr, family))) { |
37b08e34 | 1290 | to_put = x1; |
1da177e4 LT |
1291 | x1 = NULL; |
1292 | } | |
1293 | } | |
1294 | ||
eb2971b6 | 1295 | if (use_spi && !x1) |
bd55775c JHS |
1296 | x1 = __find_acq_core(net, &x->mark, family, x->props.mode, |
1297 | x->props.reqid, x->id.proto, | |
2770834c | 1298 | &x->id.daddr, &x->props.saddr, 0); |
1da177e4 | 1299 | |
c7f5ea3a | 1300 | __xfrm_state_bump_genids(x); |
1da177e4 LT |
1301 | __xfrm_state_insert(x); |
1302 | err = 0; | |
1303 | ||
1304 | out: | |
283bc9f3 | 1305 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1306 | |
1307 | if (x1) { | |
1308 | xfrm_state_delete(x1); | |
1309 | xfrm_state_put(x1); | |
1310 | } | |
1311 | ||
37b08e34 DM |
1312 | if (to_put) |
1313 | xfrm_state_put(to_put); | |
1314 | ||
1da177e4 LT |
1315 | return err; |
1316 | } | |
1317 | EXPORT_SYMBOL(xfrm_state_add); | |
1318 | ||
80c9abaa | 1319 | #ifdef CONFIG_XFRM_MIGRATE |
4ab47d47 AA |
1320 | static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, |
1321 | struct xfrm_encap_tmpl *encap) | |
80c9abaa | 1322 | { |
98806f75 | 1323 | struct net *net = xs_net(orig); |
98806f75 | 1324 | struct xfrm_state *x = xfrm_state_alloc(net); |
80c9abaa | 1325 | if (!x) |
553f9118 | 1326 | goto out; |
80c9abaa SS |
1327 | |
1328 | memcpy(&x->id, &orig->id, sizeof(x->id)); | |
1329 | memcpy(&x->sel, &orig->sel, sizeof(x->sel)); | |
1330 | memcpy(&x->lft, &orig->lft, sizeof(x->lft)); | |
1331 | x->props.mode = orig->props.mode; | |
1332 | x->props.replay_window = orig->props.replay_window; | |
1333 | x->props.reqid = orig->props.reqid; | |
1334 | x->props.family = orig->props.family; | |
1335 | x->props.saddr = orig->props.saddr; | |
1336 | ||
1337 | if (orig->aalg) { | |
4447bb33 | 1338 | x->aalg = xfrm_algo_auth_clone(orig->aalg); |
80c9abaa SS |
1339 | if (!x->aalg) |
1340 | goto error; | |
1341 | } | |
1342 | x->props.aalgo = orig->props.aalgo; | |
1343 | ||
ee5c2317 SK |
1344 | if (orig->aead) { |
1345 | x->aead = xfrm_algo_aead_clone(orig->aead); | |
75bf50f4 | 1346 | x->geniv = orig->geniv; |
ee5c2317 SK |
1347 | if (!x->aead) |
1348 | goto error; | |
1349 | } | |
80c9abaa SS |
1350 | if (orig->ealg) { |
1351 | x->ealg = xfrm_algo_clone(orig->ealg); | |
1352 | if (!x->ealg) | |
1353 | goto error; | |
1354 | } | |
1355 | x->props.ealgo = orig->props.ealgo; | |
1356 | ||
1357 | if (orig->calg) { | |
1358 | x->calg = xfrm_algo_clone(orig->calg); | |
1359 | if (!x->calg) | |
1360 | goto error; | |
1361 | } | |
1362 | x->props.calgo = orig->props.calgo; | |
1363 | ||
4ab47d47 AA |
1364 | if (encap || orig->encap) { |
1365 | if (encap) | |
1366 | x->encap = kmemdup(encap, sizeof(*x->encap), | |
1367 | GFP_KERNEL); | |
1368 | else | |
1369 | x->encap = kmemdup(orig->encap, sizeof(*x->encap), | |
1370 | GFP_KERNEL); | |
1371 | ||
80c9abaa SS |
1372 | if (!x->encap) |
1373 | goto error; | |
1374 | } | |
1375 | ||
1376 | if (orig->coaddr) { | |
1377 | x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr), | |
1378 | GFP_KERNEL); | |
1379 | if (!x->coaddr) | |
1380 | goto error; | |
1381 | } | |
1382 | ||
af2f464e | 1383 | if (orig->replay_esn) { |
cc9ab60e | 1384 | if (xfrm_replay_clone(x, orig)) |
af2f464e SK |
1385 | goto error; |
1386 | } | |
1387 | ||
bd55775c JHS |
1388 | memcpy(&x->mark, &orig->mark, sizeof(x->mark)); |
1389 | ||
cc9ab60e | 1390 | if (xfrm_init_state(x) < 0) |
80c9abaa SS |
1391 | goto error; |
1392 | ||
1393 | x->props.flags = orig->props.flags; | |
a947b0a9 | 1394 | x->props.extra_flags = orig->props.extra_flags; |
80c9abaa | 1395 | |
ee5c2317 SK |
1396 | x->tfcpad = orig->tfcpad; |
1397 | x->replay_maxdiff = orig->replay_maxdiff; | |
1398 | x->replay_maxage = orig->replay_maxage; | |
80c9abaa SS |
1399 | x->curlft.add_time = orig->curlft.add_time; |
1400 | x->km.state = orig->km.state; | |
1401 | x->km.seq = orig->km.seq; | |
a486cd23 AA |
1402 | x->replay = orig->replay; |
1403 | x->preplay = orig->preplay; | |
80c9abaa SS |
1404 | |
1405 | return x; | |
1406 | ||
1407 | error: | |
553f9118 HX |
1408 | xfrm_state_put(x); |
1409 | out: | |
80c9abaa SS |
1410 | return NULL; |
1411 | } | |
80c9abaa | 1412 | |
283bc9f3 | 1413 | struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net) |
80c9abaa SS |
1414 | { |
1415 | unsigned int h; | |
8c0cba22 SK |
1416 | struct xfrm_state *x = NULL; |
1417 | ||
1418 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
80c9abaa SS |
1419 | |
1420 | if (m->reqid) { | |
283bc9f3 | 1421 | h = xfrm_dst_hash(net, &m->old_daddr, &m->old_saddr, |
80c9abaa | 1422 | m->reqid, m->old_family); |
283bc9f3 | 1423 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
80c9abaa SS |
1424 | if (x->props.mode != m->mode || |
1425 | x->id.proto != m->proto) | |
1426 | continue; | |
1427 | if (m->reqid && x->props.reqid != m->reqid) | |
1428 | continue; | |
70e94e66 YH |
1429 | if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr, |
1430 | m->old_family) || | |
1431 | !xfrm_addr_equal(&x->props.saddr, &m->old_saddr, | |
1432 | m->old_family)) | |
80c9abaa SS |
1433 | continue; |
1434 | xfrm_state_hold(x); | |
8c0cba22 | 1435 | break; |
80c9abaa SS |
1436 | } |
1437 | } else { | |
283bc9f3 | 1438 | h = xfrm_src_hash(net, &m->old_daddr, &m->old_saddr, |
80c9abaa | 1439 | m->old_family); |
283bc9f3 | 1440 | hlist_for_each_entry(x, net->xfrm.state_bysrc+h, bysrc) { |
80c9abaa SS |
1441 | if (x->props.mode != m->mode || |
1442 | x->id.proto != m->proto) | |
1443 | continue; | |
70e94e66 YH |
1444 | if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr, |
1445 | m->old_family) || | |
1446 | !xfrm_addr_equal(&x->props.saddr, &m->old_saddr, | |
1447 | m->old_family)) | |
80c9abaa SS |
1448 | continue; |
1449 | xfrm_state_hold(x); | |
8c0cba22 | 1450 | break; |
80c9abaa SS |
1451 | } |
1452 | } | |
1453 | ||
8c0cba22 SK |
1454 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1455 | ||
1456 | return x; | |
80c9abaa SS |
1457 | } |
1458 | EXPORT_SYMBOL(xfrm_migrate_state_find); | |
1459 | ||
3e94c2dc | 1460 | struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, |
4ab47d47 AA |
1461 | struct xfrm_migrate *m, |
1462 | struct xfrm_encap_tmpl *encap) | |
80c9abaa SS |
1463 | { |
1464 | struct xfrm_state *xc; | |
80c9abaa | 1465 | |
4ab47d47 | 1466 | xc = xfrm_state_clone(x, encap); |
80c9abaa SS |
1467 | if (!xc) |
1468 | return NULL; | |
1469 | ||
1470 | memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr)); | |
1471 | memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr)); | |
1472 | ||
1473 | /* add state */ | |
70e94e66 | 1474 | if (xfrm_addr_equal(&x->id.daddr, &m->new_daddr, m->new_family)) { |
80c9abaa SS |
1475 | /* a care is needed when the destination address of the |
1476 | state is to be updated as it is a part of triplet */ | |
1477 | xfrm_state_insert(xc); | |
1478 | } else { | |
cc9ab60e | 1479 | if (xfrm_state_add(xc) < 0) |
80c9abaa SS |
1480 | goto error; |
1481 | } | |
1482 | ||
1483 | return xc; | |
1484 | error: | |
78347c8c | 1485 | xfrm_state_put(xc); |
80c9abaa SS |
1486 | return NULL; |
1487 | } | |
1488 | EXPORT_SYMBOL(xfrm_state_migrate); | |
1489 | #endif | |
1490 | ||
1da177e4 LT |
1491 | int xfrm_state_update(struct xfrm_state *x) |
1492 | { | |
37b08e34 | 1493 | struct xfrm_state *x1, *to_put; |
1da177e4 | 1494 | int err; |
eb2971b6 | 1495 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
283bc9f3 | 1496 | struct net *net = xs_net(x); |
1da177e4 | 1497 | |
37b08e34 DM |
1498 | to_put = NULL; |
1499 | ||
283bc9f3 | 1500 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
edcd5821 | 1501 | x1 = __xfrm_state_locate(x, use_spi, x->props.family); |
1da177e4 LT |
1502 | |
1503 | err = -ESRCH; | |
1504 | if (!x1) | |
1505 | goto out; | |
1506 | ||
1507 | if (xfrm_state_kern(x1)) { | |
37b08e34 | 1508 | to_put = x1; |
1da177e4 LT |
1509 | err = -EEXIST; |
1510 | goto out; | |
1511 | } | |
1512 | ||
1513 | if (x1->km.state == XFRM_STATE_ACQ) { | |
1514 | __xfrm_state_insert(x); | |
1515 | x = NULL; | |
1516 | } | |
1517 | err = 0; | |
1518 | ||
1519 | out: | |
283bc9f3 | 1520 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 1521 | |
37b08e34 DM |
1522 | if (to_put) |
1523 | xfrm_state_put(to_put); | |
1524 | ||
1da177e4 LT |
1525 | if (err) |
1526 | return err; | |
1527 | ||
1528 | if (!x) { | |
1529 | xfrm_state_delete(x1); | |
1530 | xfrm_state_put(x1); | |
1531 | return 0; | |
1532 | } | |
1533 | ||
1534 | err = -EINVAL; | |
1535 | spin_lock_bh(&x1->lock); | |
1536 | if (likely(x1->km.state == XFRM_STATE_VALID)) { | |
1537 | if (x->encap && x1->encap) | |
1538 | memcpy(x1->encap, x->encap, sizeof(*x1->encap)); | |
060f02a3 NT |
1539 | if (x->coaddr && x1->coaddr) { |
1540 | memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr)); | |
1541 | } | |
1542 | if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel))) | |
1543 | memcpy(&x1->sel, &x->sel, sizeof(x1->sel)); | |
1da177e4 LT |
1544 | memcpy(&x1->lft, &x->lft, sizeof(x1->lft)); |
1545 | x1->km.dying = 0; | |
1546 | ||
9e0d57fd | 1547 | tasklet_hrtimer_start(&x1->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL); |
1da177e4 LT |
1548 | if (x1->curlft.use_time) |
1549 | xfrm_state_check_expire(x1); | |
1550 | ||
1551 | err = 0; | |
8fcbc637 TG |
1552 | x->km.state = XFRM_STATE_DEAD; |
1553 | __xfrm_state_put(x); | |
1da177e4 LT |
1554 | } |
1555 | spin_unlock_bh(&x1->lock); | |
1556 | ||
1557 | xfrm_state_put(x1); | |
1558 | ||
1559 | return err; | |
1560 | } | |
1561 | EXPORT_SYMBOL(xfrm_state_update); | |
1562 | ||
1563 | int xfrm_state_check_expire(struct xfrm_state *x) | |
1564 | { | |
1565 | if (!x->curlft.use_time) | |
9d729f72 | 1566 | x->curlft.use_time = get_seconds(); |
1da177e4 | 1567 | |
1da177e4 LT |
1568 | if (x->curlft.bytes >= x->lft.hard_byte_limit || |
1569 | x->curlft.packets >= x->lft.hard_packet_limit) { | |
4666faab | 1570 | x->km.state = XFRM_STATE_EXPIRED; |
8b0e1953 | 1571 | tasklet_hrtimer_start(&x->mtimer, 0, HRTIMER_MODE_REL); |
1da177e4 LT |
1572 | return -EINVAL; |
1573 | } | |
1574 | ||
1575 | if (!x->km.dying && | |
1576 | (x->curlft.bytes >= x->lft.soft_byte_limit || | |
4666faab HX |
1577 | x->curlft.packets >= x->lft.soft_packet_limit)) { |
1578 | x->km.dying = 1; | |
53bc6b4d | 1579 | km_state_expired(x, 0, 0); |
4666faab | 1580 | } |
1da177e4 LT |
1581 | return 0; |
1582 | } | |
1583 | EXPORT_SYMBOL(xfrm_state_check_expire); | |
1584 | ||
1da177e4 | 1585 | struct xfrm_state * |
a70486f0 | 1586 | xfrm_state_lookup(struct net *net, u32 mark, const xfrm_address_t *daddr, __be32 spi, |
bd55775c | 1587 | u8 proto, unsigned short family) |
1da177e4 LT |
1588 | { |
1589 | struct xfrm_state *x; | |
1da177e4 | 1590 | |
c2f672fc | 1591 | rcu_read_lock(); |
bd55775c | 1592 | x = __xfrm_state_lookup(net, mark, daddr, spi, proto, family); |
c2f672fc | 1593 | rcu_read_unlock(); |
1da177e4 LT |
1594 | return x; |
1595 | } | |
1596 | EXPORT_SYMBOL(xfrm_state_lookup); | |
1597 | ||
1598 | struct xfrm_state * | |
bd55775c | 1599 | xfrm_state_lookup_byaddr(struct net *net, u32 mark, |
a70486f0 | 1600 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
eb2971b6 MN |
1601 | u8 proto, unsigned short family) |
1602 | { | |
1603 | struct xfrm_state *x; | |
eb2971b6 | 1604 | |
283bc9f3 | 1605 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1606 | x = __xfrm_state_lookup_byaddr(net, mark, daddr, saddr, proto, family); |
283bc9f3 | 1607 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
eb2971b6 MN |
1608 | return x; |
1609 | } | |
1610 | EXPORT_SYMBOL(xfrm_state_lookup_byaddr); | |
1611 | ||
1612 | struct xfrm_state * | |
e473fcb4 MK |
1613 | xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, u8 mode, u32 reqid, |
1614 | u8 proto, const xfrm_address_t *daddr, | |
1615 | const xfrm_address_t *saddr, int create, unsigned short family) | |
1da177e4 LT |
1616 | { |
1617 | struct xfrm_state *x; | |
1da177e4 | 1618 | |
283bc9f3 | 1619 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1620 | x = __find_acq_core(net, mark, family, mode, reqid, proto, daddr, saddr, create); |
283bc9f3 | 1621 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
2770834c | 1622 | |
1da177e4 LT |
1623 | return x; |
1624 | } | |
1625 | EXPORT_SYMBOL(xfrm_find_acq); | |
1626 | ||
41a49cc3 MN |
1627 | #ifdef CONFIG_XFRM_SUB_POLICY |
1628 | int | |
1629 | xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, | |
283bc9f3 | 1630 | unsigned short family, struct net *net) |
41a49cc3 | 1631 | { |
3f5a95ad | 1632 | int i; |
41a49cc3 MN |
1633 | int err = 0; |
1634 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
1635 | if (!afinfo) | |
1636 | return -EAFNOSUPPORT; | |
1637 | ||
283bc9f3 | 1638 | spin_lock_bh(&net->xfrm.xfrm_state_lock); /*FIXME*/ |
41a49cc3 MN |
1639 | if (afinfo->tmpl_sort) |
1640 | err = afinfo->tmpl_sort(dst, src, n); | |
3f5a95ad KD |
1641 | else |
1642 | for (i = 0; i < n; i++) | |
1643 | dst[i] = src[i]; | |
283bc9f3 | 1644 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
af5d27c4 | 1645 | rcu_read_unlock(); |
41a49cc3 MN |
1646 | return err; |
1647 | } | |
1648 | EXPORT_SYMBOL(xfrm_tmpl_sort); | |
1649 | ||
1650 | int | |
1651 | xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, | |
1652 | unsigned short family) | |
1653 | { | |
3f5a95ad | 1654 | int i; |
41a49cc3 MN |
1655 | int err = 0; |
1656 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
35ea790d | 1657 | struct net *net = xs_net(*src); |
283bc9f3 | 1658 | |
41a49cc3 MN |
1659 | if (!afinfo) |
1660 | return -EAFNOSUPPORT; | |
1661 | ||
283bc9f3 | 1662 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
41a49cc3 MN |
1663 | if (afinfo->state_sort) |
1664 | err = afinfo->state_sort(dst, src, n); | |
3f5a95ad KD |
1665 | else |
1666 | for (i = 0; i < n; i++) | |
1667 | dst[i] = src[i]; | |
283bc9f3 | 1668 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
af5d27c4 | 1669 | rcu_read_unlock(); |
41a49cc3 MN |
1670 | return err; |
1671 | } | |
1672 | EXPORT_SYMBOL(xfrm_state_sort); | |
1673 | #endif | |
1674 | ||
1da177e4 LT |
1675 | /* Silly enough, but I'm lazy to build resolution list */ |
1676 | ||
bd55775c | 1677 | static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq) |
1da177e4 LT |
1678 | { |
1679 | int i; | |
1da177e4 | 1680 | |
5447c5e4 | 1681 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
8f126e37 DM |
1682 | struct xfrm_state *x; |
1683 | ||
b67bfe0d | 1684 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
8f126e37 | 1685 | if (x->km.seq == seq && |
3d6acfa7 | 1686 | (mark & x->mark.m) == x->mark.v && |
8f126e37 | 1687 | x->km.state == XFRM_STATE_ACQ) { |
1da177e4 LT |
1688 | xfrm_state_hold(x); |
1689 | return x; | |
1690 | } | |
1691 | } | |
1692 | } | |
1693 | return NULL; | |
1694 | } | |
1695 | ||
bd55775c | 1696 | struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq) |
1da177e4 LT |
1697 | { |
1698 | struct xfrm_state *x; | |
1699 | ||
283bc9f3 | 1700 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1701 | x = __xfrm_find_acq_byseq(net, mark, seq); |
283bc9f3 | 1702 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1703 | return x; |
1704 | } | |
1705 | EXPORT_SYMBOL(xfrm_find_acq_byseq); | |
1706 | ||
1707 | u32 xfrm_get_acqseq(void) | |
1708 | { | |
1709 | u32 res; | |
6836b9bd | 1710 | static atomic_t acqseq; |
1711 | ||
1712 | do { | |
1713 | res = atomic_inc_return(&acqseq); | |
1714 | } while (!res); | |
1da177e4 | 1715 | |
1da177e4 LT |
1716 | return res; |
1717 | } | |
1718 | EXPORT_SYMBOL(xfrm_get_acqseq); | |
1719 | ||
776e9dd9 FD |
1720 | int verify_spi_info(u8 proto, u32 min, u32 max) |
1721 | { | |
1722 | switch (proto) { | |
1723 | case IPPROTO_AH: | |
1724 | case IPPROTO_ESP: | |
1725 | break; | |
1726 | ||
1727 | case IPPROTO_COMP: | |
1728 | /* IPCOMP spi is 16-bits. */ | |
1729 | if (max >= 0x10000) | |
1730 | return -EINVAL; | |
1731 | break; | |
1732 | ||
1733 | default: | |
1734 | return -EINVAL; | |
1735 | } | |
1736 | ||
1737 | if (min > max) | |
1738 | return -EINVAL; | |
1739 | ||
1740 | return 0; | |
1741 | } | |
1742 | EXPORT_SYMBOL(verify_spi_info); | |
1743 | ||
658b219e | 1744 | int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high) |
1da177e4 | 1745 | { |
221df1ed | 1746 | struct net *net = xs_net(x); |
f034b5d4 | 1747 | unsigned int h; |
1da177e4 | 1748 | struct xfrm_state *x0; |
658b219e HX |
1749 | int err = -ENOENT; |
1750 | __be32 minspi = htonl(low); | |
1751 | __be32 maxspi = htonl(high); | |
bd55775c | 1752 | u32 mark = x->mark.v & x->mark.m; |
1da177e4 | 1753 | |
658b219e HX |
1754 | spin_lock_bh(&x->lock); |
1755 | if (x->km.state == XFRM_STATE_DEAD) | |
1756 | goto unlock; | |
1757 | ||
1758 | err = 0; | |
1da177e4 | 1759 | if (x->id.spi) |
658b219e HX |
1760 | goto unlock; |
1761 | ||
1762 | err = -ENOENT; | |
1da177e4 LT |
1763 | |
1764 | if (minspi == maxspi) { | |
bd55775c | 1765 | x0 = xfrm_state_lookup(net, mark, &x->id.daddr, minspi, x->id.proto, x->props.family); |
1da177e4 LT |
1766 | if (x0) { |
1767 | xfrm_state_put(x0); | |
658b219e | 1768 | goto unlock; |
1da177e4 LT |
1769 | } |
1770 | x->id.spi = minspi; | |
1771 | } else { | |
1772 | u32 spi = 0; | |
9b7a787d | 1773 | for (h = 0; h < high-low+1; h++) { |
63862b5b | 1774 | spi = low + prandom_u32()%(high-low+1); |
bd55775c | 1775 | x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family); |
1da177e4 LT |
1776 | if (x0 == NULL) { |
1777 | x->id.spi = htonl(spi); | |
1778 | break; | |
1779 | } | |
1780 | xfrm_state_put(x0); | |
1781 | } | |
1782 | } | |
1783 | if (x->id.spi) { | |
283bc9f3 | 1784 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12604d8a | 1785 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family); |
ae3fb6d3 | 1786 | hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h); |
283bc9f3 | 1787 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
658b219e HX |
1788 | |
1789 | err = 0; | |
1da177e4 | 1790 | } |
658b219e HX |
1791 | |
1792 | unlock: | |
1793 | spin_unlock_bh(&x->lock); | |
1794 | ||
1795 | return err; | |
1da177e4 LT |
1796 | } |
1797 | EXPORT_SYMBOL(xfrm_alloc_spi); | |
1798 | ||
d3623099 | 1799 | static bool __xfrm_state_filter_match(struct xfrm_state *x, |
870a2df4 | 1800 | struct xfrm_address_filter *filter) |
d3623099 ND |
1801 | { |
1802 | if (filter) { | |
1803 | if ((filter->family == AF_INET || | |
1804 | filter->family == AF_INET6) && | |
1805 | x->props.family != filter->family) | |
1806 | return false; | |
1807 | ||
1808 | return addr_match(&x->props.saddr, &filter->saddr, | |
1809 | filter->splen) && | |
1810 | addr_match(&x->id.daddr, &filter->daddr, | |
1811 | filter->dplen); | |
1812 | } | |
1813 | return true; | |
1814 | } | |
1815 | ||
284fa7da | 1816 | int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, |
4c563f76 | 1817 | int (*func)(struct xfrm_state *, int, void*), |
1da177e4 LT |
1818 | void *data) |
1819 | { | |
12a169e7 HX |
1820 | struct xfrm_state *state; |
1821 | struct xfrm_state_walk *x; | |
1da177e4 LT |
1822 | int err = 0; |
1823 | ||
12a169e7 | 1824 | if (walk->seq != 0 && list_empty(&walk->all)) |
4c563f76 TT |
1825 | return 0; |
1826 | ||
283bc9f3 | 1827 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12a169e7 | 1828 | if (list_empty(&walk->all)) |
284fa7da | 1829 | x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all); |
12a169e7 | 1830 | else |
80077702 | 1831 | x = list_first_entry(&walk->all, struct xfrm_state_walk, all); |
284fa7da | 1832 | list_for_each_entry_from(x, &net->xfrm.state_all, all) { |
12a169e7 | 1833 | if (x->state == XFRM_STATE_DEAD) |
4c563f76 | 1834 | continue; |
12a169e7 HX |
1835 | state = container_of(x, struct xfrm_state, km); |
1836 | if (!xfrm_id_proto_match(state->id.proto, walk->proto)) | |
4c563f76 | 1837 | continue; |
d3623099 ND |
1838 | if (!__xfrm_state_filter_match(state, walk->filter)) |
1839 | continue; | |
12a169e7 HX |
1840 | err = func(state, walk->seq, data); |
1841 | if (err) { | |
1842 | list_move_tail(&walk->all, &x->all); | |
1843 | goto out; | |
1da177e4 | 1844 | } |
12a169e7 | 1845 | walk->seq++; |
1da177e4 | 1846 | } |
12a169e7 | 1847 | if (walk->seq == 0) { |
1da177e4 LT |
1848 | err = -ENOENT; |
1849 | goto out; | |
1850 | } | |
12a169e7 | 1851 | list_del_init(&walk->all); |
1da177e4 | 1852 | out: |
283bc9f3 | 1853 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1854 | return err; |
1855 | } | |
1856 | EXPORT_SYMBOL(xfrm_state_walk); | |
1857 | ||
d3623099 | 1858 | void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto, |
870a2df4 | 1859 | struct xfrm_address_filter *filter) |
5c182458 | 1860 | { |
12a169e7 | 1861 | INIT_LIST_HEAD(&walk->all); |
5c182458 | 1862 | walk->proto = proto; |
12a169e7 HX |
1863 | walk->state = XFRM_STATE_DEAD; |
1864 | walk->seq = 0; | |
d3623099 | 1865 | walk->filter = filter; |
5c182458 HX |
1866 | } |
1867 | EXPORT_SYMBOL(xfrm_state_walk_init); | |
1868 | ||
283bc9f3 | 1869 | void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net) |
abb81c4f | 1870 | { |
d3623099 ND |
1871 | kfree(walk->filter); |
1872 | ||
12a169e7 | 1873 | if (list_empty(&walk->all)) |
5c182458 | 1874 | return; |
5c182458 | 1875 | |
283bc9f3 | 1876 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12a169e7 | 1877 | list_del(&walk->all); |
283bc9f3 | 1878 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
abb81c4f HX |
1879 | } |
1880 | EXPORT_SYMBOL(xfrm_state_walk_done); | |
1881 | ||
e99e88a9 | 1882 | static void xfrm_replay_timer_handler(struct timer_list *t) |
f8cd5488 | 1883 | { |
e99e88a9 | 1884 | struct xfrm_state *x = from_timer(x, t, rtimer); |
f8cd5488 JHS |
1885 | |
1886 | spin_lock(&x->lock); | |
1887 | ||
2717096a | 1888 | if (x->km.state == XFRM_STATE_VALID) { |
a6483b79 | 1889 | if (xfrm_aevent_is_on(xs_net(x))) |
9fdc4883 | 1890 | x->repl->notify(x, XFRM_REPLAY_TIMEOUT); |
2717096a JHS |
1891 | else |
1892 | x->xflags |= XFRM_TIME_DEFER; | |
1893 | } | |
f8cd5488 JHS |
1894 | |
1895 | spin_unlock(&x->lock); | |
1896 | } | |
1897 | ||
df01812e | 1898 | static LIST_HEAD(xfrm_km_list); |
1da177e4 | 1899 | |
214e005b | 1900 | void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
1da177e4 LT |
1901 | { |
1902 | struct xfrm_mgr *km; | |
1903 | ||
85168c00 CW |
1904 | rcu_read_lock(); |
1905 | list_for_each_entry_rcu(km, &xfrm_km_list, list) | |
26b15dad JHS |
1906 | if (km->notify_policy) |
1907 | km->notify_policy(xp, dir, c); | |
85168c00 | 1908 | rcu_read_unlock(); |
26b15dad | 1909 | } |
1da177e4 | 1910 | |
214e005b | 1911 | void km_state_notify(struct xfrm_state *x, const struct km_event *c) |
26b15dad JHS |
1912 | { |
1913 | struct xfrm_mgr *km; | |
85168c00 CW |
1914 | rcu_read_lock(); |
1915 | list_for_each_entry_rcu(km, &xfrm_km_list, list) | |
26b15dad JHS |
1916 | if (km->notify) |
1917 | km->notify(x, c); | |
85168c00 | 1918 | rcu_read_unlock(); |
26b15dad JHS |
1919 | } |
1920 | ||
1921 | EXPORT_SYMBOL(km_policy_notify); | |
1922 | EXPORT_SYMBOL(km_state_notify); | |
1923 | ||
15e47304 | 1924 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid) |
26b15dad JHS |
1925 | { |
1926 | struct km_event c; | |
1927 | ||
bf08867f | 1928 | c.data.hard = hard; |
15e47304 | 1929 | c.portid = portid; |
f60f6b8f | 1930 | c.event = XFRM_MSG_EXPIRE; |
26b15dad | 1931 | km_state_notify(x, &c); |
1da177e4 LT |
1932 | } |
1933 | ||
53bc6b4d | 1934 | EXPORT_SYMBOL(km_state_expired); |
26b15dad JHS |
1935 | /* |
1936 | * We send to all registered managers regardless of failure | |
1937 | * We are happy with one success | |
1938 | */ | |
980ebd25 | 1939 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol) |
1da177e4 | 1940 | { |
26b15dad | 1941 | int err = -EINVAL, acqret; |
1da177e4 LT |
1942 | struct xfrm_mgr *km; |
1943 | ||
85168c00 CW |
1944 | rcu_read_lock(); |
1945 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
65e0736b | 1946 | acqret = km->acquire(x, t, pol); |
26b15dad JHS |
1947 | if (!acqret) |
1948 | err = acqret; | |
1da177e4 | 1949 | } |
85168c00 | 1950 | rcu_read_unlock(); |
1da177e4 LT |
1951 | return err; |
1952 | } | |
980ebd25 | 1953 | EXPORT_SYMBOL(km_query); |
1da177e4 | 1954 | |
5d36b180 | 1955 | int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) |
1da177e4 LT |
1956 | { |
1957 | int err = -EINVAL; | |
1958 | struct xfrm_mgr *km; | |
1959 | ||
85168c00 CW |
1960 | rcu_read_lock(); |
1961 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
1da177e4 LT |
1962 | if (km->new_mapping) |
1963 | err = km->new_mapping(x, ipaddr, sport); | |
1964 | if (!err) | |
1965 | break; | |
1966 | } | |
85168c00 | 1967 | rcu_read_unlock(); |
1da177e4 LT |
1968 | return err; |
1969 | } | |
1970 | EXPORT_SYMBOL(km_new_mapping); | |
1971 | ||
15e47304 | 1972 | void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid) |
1da177e4 | 1973 | { |
26b15dad | 1974 | struct km_event c; |
1da177e4 | 1975 | |
bf08867f | 1976 | c.data.hard = hard; |
15e47304 | 1977 | c.portid = portid; |
f60f6b8f | 1978 | c.event = XFRM_MSG_POLEXPIRE; |
26b15dad | 1979 | km_policy_notify(pol, dir, &c); |
1da177e4 | 1980 | } |
a70fcb0b | 1981 | EXPORT_SYMBOL(km_policy_expired); |
1da177e4 | 1982 | |
2d60abc2 | 1983 | #ifdef CONFIG_XFRM_MIGRATE |
183cad12 DM |
1984 | int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1985 | const struct xfrm_migrate *m, int num_migrate, | |
8bafd730 AA |
1986 | const struct xfrm_kmaddress *k, |
1987 | const struct xfrm_encap_tmpl *encap) | |
80c9abaa SS |
1988 | { |
1989 | int err = -EINVAL; | |
1990 | int ret; | |
1991 | struct xfrm_mgr *km; | |
1992 | ||
85168c00 CW |
1993 | rcu_read_lock(); |
1994 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
80c9abaa | 1995 | if (km->migrate) { |
8bafd730 AA |
1996 | ret = km->migrate(sel, dir, type, m, num_migrate, k, |
1997 | encap); | |
80c9abaa SS |
1998 | if (!ret) |
1999 | err = ret; | |
2000 | } | |
2001 | } | |
85168c00 | 2002 | rcu_read_unlock(); |
80c9abaa SS |
2003 | return err; |
2004 | } | |
2005 | EXPORT_SYMBOL(km_migrate); | |
2d60abc2 | 2006 | #endif |
80c9abaa | 2007 | |
db983c11 | 2008 | int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr) |
97a64b45 MN |
2009 | { |
2010 | int err = -EINVAL; | |
2011 | int ret; | |
2012 | struct xfrm_mgr *km; | |
2013 | ||
85168c00 CW |
2014 | rcu_read_lock(); |
2015 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
97a64b45 | 2016 | if (km->report) { |
db983c11 | 2017 | ret = km->report(net, proto, sel, addr); |
97a64b45 MN |
2018 | if (!ret) |
2019 | err = ret; | |
2020 | } | |
2021 | } | |
85168c00 | 2022 | rcu_read_unlock(); |
97a64b45 MN |
2023 | return err; |
2024 | } | |
2025 | EXPORT_SYMBOL(km_report); | |
2026 | ||
0f24558e HG |
2027 | bool km_is_alive(const struct km_event *c) |
2028 | { | |
2029 | struct xfrm_mgr *km; | |
2030 | bool is_alive = false; | |
2031 | ||
2032 | rcu_read_lock(); | |
2033 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
2034 | if (km->is_alive && km->is_alive(c)) { | |
2035 | is_alive = true; | |
2036 | break; | |
2037 | } | |
2038 | } | |
2039 | rcu_read_unlock(); | |
2040 | ||
2041 | return is_alive; | |
2042 | } | |
2043 | EXPORT_SYMBOL(km_is_alive); | |
2044 | ||
1da177e4 LT |
2045 | int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) |
2046 | { | |
2047 | int err; | |
2048 | u8 *data; | |
2049 | struct xfrm_mgr *km; | |
2050 | struct xfrm_policy *pol = NULL; | |
2051 | ||
2052 | if (optlen <= 0 || optlen > PAGE_SIZE) | |
2053 | return -EMSGSIZE; | |
2054 | ||
a133d930 GT |
2055 | data = memdup_user(optval, optlen); |
2056 | if (IS_ERR(data)) | |
2057 | return PTR_ERR(data); | |
1da177e4 LT |
2058 | |
2059 | err = -EINVAL; | |
85168c00 CW |
2060 | rcu_read_lock(); |
2061 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
cb969f07 | 2062 | pol = km->compile_policy(sk, optname, data, |
1da177e4 LT |
2063 | optlen, &err); |
2064 | if (err >= 0) | |
2065 | break; | |
2066 | } | |
85168c00 | 2067 | rcu_read_unlock(); |
1da177e4 LT |
2068 | |
2069 | if (err >= 0) { | |
2070 | xfrm_sk_policy_insert(sk, err, pol); | |
2071 | xfrm_pol_put(pol); | |
2b06cdf3 | 2072 | __sk_dst_reset(sk); |
1da177e4 LT |
2073 | err = 0; |
2074 | } | |
2075 | ||
1da177e4 LT |
2076 | kfree(data); |
2077 | return err; | |
2078 | } | |
2079 | EXPORT_SYMBOL(xfrm_user_policy); | |
2080 | ||
85168c00 CW |
2081 | static DEFINE_SPINLOCK(xfrm_km_lock); |
2082 | ||
1da177e4 LT |
2083 | int xfrm_register_km(struct xfrm_mgr *km) |
2084 | { | |
85168c00 CW |
2085 | spin_lock_bh(&xfrm_km_lock); |
2086 | list_add_tail_rcu(&km->list, &xfrm_km_list); | |
2087 | spin_unlock_bh(&xfrm_km_lock); | |
1da177e4 LT |
2088 | return 0; |
2089 | } | |
2090 | EXPORT_SYMBOL(xfrm_register_km); | |
2091 | ||
2092 | int xfrm_unregister_km(struct xfrm_mgr *km) | |
2093 | { | |
85168c00 CW |
2094 | spin_lock_bh(&xfrm_km_lock); |
2095 | list_del_rcu(&km->list); | |
2096 | spin_unlock_bh(&xfrm_km_lock); | |
2097 | synchronize_rcu(); | |
1da177e4 LT |
2098 | return 0; |
2099 | } | |
2100 | EXPORT_SYMBOL(xfrm_unregister_km); | |
2101 | ||
2102 | int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo) | |
2103 | { | |
2104 | int err = 0; | |
423826a7 FW |
2105 | |
2106 | if (WARN_ON(afinfo->family >= NPROTO)) | |
1da177e4 | 2107 | return -EAFNOSUPPORT; |
423826a7 | 2108 | |
44abdc30 | 2109 | spin_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 | 2110 | if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL)) |
f31e8d4f | 2111 | err = -EEXIST; |
edcd5821 | 2112 | else |
44abdc30 CW |
2113 | rcu_assign_pointer(xfrm_state_afinfo[afinfo->family], afinfo); |
2114 | spin_unlock_bh(&xfrm_state_afinfo_lock); | |
1da177e4 LT |
2115 | return err; |
2116 | } | |
2117 | EXPORT_SYMBOL(xfrm_state_register_afinfo); | |
2118 | ||
2119 | int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo) | |
2120 | { | |
423826a7 FW |
2121 | int err = 0, family = afinfo->family; |
2122 | ||
2123 | if (WARN_ON(family >= NPROTO)) | |
1da177e4 | 2124 | return -EAFNOSUPPORT; |
423826a7 | 2125 | |
44abdc30 | 2126 | spin_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 | 2127 | if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) { |
423826a7 | 2128 | if (rcu_access_pointer(xfrm_state_afinfo[family]) != afinfo) |
1da177e4 | 2129 | err = -EINVAL; |
edcd5821 | 2130 | else |
44abdc30 | 2131 | RCU_INIT_POINTER(xfrm_state_afinfo[afinfo->family], NULL); |
1da177e4 | 2132 | } |
44abdc30 CW |
2133 | spin_unlock_bh(&xfrm_state_afinfo_lock); |
2134 | synchronize_rcu(); | |
1da177e4 LT |
2135 | return err; |
2136 | } | |
2137 | EXPORT_SYMBOL(xfrm_state_unregister_afinfo); | |
2138 | ||
711059b9 FW |
2139 | struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family) |
2140 | { | |
2141 | if (unlikely(family >= NPROTO)) | |
2142 | return NULL; | |
2143 | ||
2144 | return rcu_dereference(xfrm_state_afinfo[family]); | |
2145 | } | |
2146 | ||
628e341f | 2147 | struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family) |
1da177e4 LT |
2148 | { |
2149 | struct xfrm_state_afinfo *afinfo; | |
2150 | if (unlikely(family >= NPROTO)) | |
2151 | return NULL; | |
44abdc30 CW |
2152 | rcu_read_lock(); |
2153 | afinfo = rcu_dereference(xfrm_state_afinfo[family]); | |
546be240 | 2154 | if (unlikely(!afinfo)) |
44abdc30 | 2155 | rcu_read_unlock(); |
1da177e4 LT |
2156 | return afinfo; |
2157 | } | |
2158 | ||
1da177e4 LT |
2159 | /* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */ |
2160 | void xfrm_state_delete_tunnel(struct xfrm_state *x) | |
2161 | { | |
2162 | if (x->tunnel) { | |
2163 | struct xfrm_state *t = x->tunnel; | |
2164 | ||
2165 | if (atomic_read(&t->tunnel_users) == 2) | |
2166 | xfrm_state_delete(t); | |
2167 | atomic_dec(&t->tunnel_users); | |
2168 | xfrm_state_put(t); | |
2169 | x->tunnel = NULL; | |
2170 | } | |
2171 | } | |
2172 | EXPORT_SYMBOL(xfrm_state_delete_tunnel); | |
2173 | ||
2174 | int xfrm_state_mtu(struct xfrm_state *x, int mtu) | |
2175 | { | |
b3b73b8e | 2176 | const struct xfrm_type *type = READ_ONCE(x->type); |
1da177e4 | 2177 | |
c5c25238 | 2178 | if (x->km.state == XFRM_STATE_VALID && |
b3b73b8e FW |
2179 | type && type->get_mtu) |
2180 | return type->get_mtu(x, mtu); | |
2181 | ||
2182 | return mtu - x->props.header_len; | |
1da177e4 LT |
2183 | } |
2184 | ||
ffdb5211 | 2185 | int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload) |
72cb6962 | 2186 | { |
d094cd83 | 2187 | struct xfrm_state_afinfo *afinfo; |
df9dcb45 | 2188 | struct xfrm_mode *inner_mode; |
d094cd83 | 2189 | int family = x->props.family; |
72cb6962 HX |
2190 | int err; |
2191 | ||
d094cd83 HX |
2192 | err = -EAFNOSUPPORT; |
2193 | afinfo = xfrm_state_get_afinfo(family); | |
2194 | if (!afinfo) | |
2195 | goto error; | |
2196 | ||
2197 | err = 0; | |
2198 | if (afinfo->init_flags) | |
2199 | err = afinfo->init_flags(x); | |
2200 | ||
af5d27c4 | 2201 | rcu_read_unlock(); |
d094cd83 HX |
2202 | |
2203 | if (err) | |
2204 | goto error; | |
2205 | ||
2206 | err = -EPROTONOSUPPORT; | |
13996378 | 2207 | |
df9dcb45 KM |
2208 | if (x->sel.family != AF_UNSPEC) { |
2209 | inner_mode = xfrm_get_mode(x->props.mode, x->sel.family); | |
2210 | if (inner_mode == NULL) | |
2211 | goto error; | |
2212 | ||
2213 | if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) && | |
2214 | family != x->sel.family) { | |
2215 | xfrm_put_mode(inner_mode); | |
2216 | goto error; | |
2217 | } | |
2218 | ||
2219 | x->inner_mode = inner_mode; | |
2220 | } else { | |
2221 | struct xfrm_mode *inner_mode_iaf; | |
d81d2285 | 2222 | int iafamily = AF_INET; |
df9dcb45 | 2223 | |
d81d2285 | 2224 | inner_mode = xfrm_get_mode(x->props.mode, x->props.family); |
df9dcb45 KM |
2225 | if (inner_mode == NULL) |
2226 | goto error; | |
2227 | ||
2228 | if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) { | |
2229 | xfrm_put_mode(inner_mode); | |
2230 | goto error; | |
2231 | } | |
d81d2285 | 2232 | x->inner_mode = inner_mode; |
df9dcb45 | 2233 | |
d81d2285 MW |
2234 | if (x->props.family == AF_INET) |
2235 | iafamily = AF_INET6; | |
df9dcb45 | 2236 | |
d81d2285 MW |
2237 | inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily); |
2238 | if (inner_mode_iaf) { | |
2239 | if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL) | |
2240 | x->inner_mode_iaf = inner_mode_iaf; | |
2241 | else | |
2242 | xfrm_put_mode(inner_mode_iaf); | |
df9dcb45 KM |
2243 | } |
2244 | } | |
13996378 | 2245 | |
d094cd83 | 2246 | x->type = xfrm_get_type(x->id.proto, family); |
72cb6962 HX |
2247 | if (x->type == NULL) |
2248 | goto error; | |
2249 | ||
ffdb5211 | 2250 | x->type_offload = xfrm_get_type_offload(x->id.proto, family, offload); |
9d389d7f | 2251 | |
72cb6962 HX |
2252 | err = x->type->init_state(x); |
2253 | if (err) | |
2254 | goto error; | |
2255 | ||
13996378 | 2256 | x->outer_mode = xfrm_get_mode(x->props.mode, family); |
599901c3 JL |
2257 | if (x->outer_mode == NULL) { |
2258 | err = -EPROTONOSUPPORT; | |
b59f45d0 | 2259 | goto error; |
599901c3 | 2260 | } |
b59f45d0 | 2261 | |
a454f0cc WY |
2262 | if (init_replay) { |
2263 | err = xfrm_init_replay(x); | |
2264 | if (err) | |
2265 | goto error; | |
2266 | } | |
2267 | ||
72cb6962 HX |
2268 | x->km.state = XFRM_STATE_VALID; |
2269 | ||
2270 | error: | |
2271 | return err; | |
2272 | } | |
2273 | ||
a454f0cc WY |
2274 | EXPORT_SYMBOL(__xfrm_init_state); |
2275 | ||
2276 | int xfrm_init_state(struct xfrm_state *x) | |
2277 | { | |
ffdb5211 | 2278 | return __xfrm_init_state(x, true, false); |
a454f0cc WY |
2279 | } |
2280 | ||
72cb6962 | 2281 | EXPORT_SYMBOL(xfrm_init_state); |
a716c119 | 2282 | |
d62ddc21 | 2283 | int __net_init xfrm_state_init(struct net *net) |
1da177e4 | 2284 | { |
f034b5d4 DM |
2285 | unsigned int sz; |
2286 | ||
9d4139c7 AD |
2287 | INIT_LIST_HEAD(&net->xfrm.state_all); |
2288 | ||
f034b5d4 DM |
2289 | sz = sizeof(struct hlist_head) * 8; |
2290 | ||
73d189dc AD |
2291 | net->xfrm.state_bydst = xfrm_hash_alloc(sz); |
2292 | if (!net->xfrm.state_bydst) | |
2293 | goto out_bydst; | |
d320bbb3 AD |
2294 | net->xfrm.state_bysrc = xfrm_hash_alloc(sz); |
2295 | if (!net->xfrm.state_bysrc) | |
2296 | goto out_bysrc; | |
b754a4fd AD |
2297 | net->xfrm.state_byspi = xfrm_hash_alloc(sz); |
2298 | if (!net->xfrm.state_byspi) | |
2299 | goto out_byspi; | |
529983ec | 2300 | net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1); |
1da177e4 | 2301 | |
0bf7c5b0 | 2302 | net->xfrm.state_num = 0; |
63082733 | 2303 | INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize); |
283bc9f3 | 2304 | spin_lock_init(&net->xfrm.xfrm_state_lock); |
d62ddc21 | 2305 | return 0; |
73d189dc | 2306 | |
b754a4fd AD |
2307 | out_byspi: |
2308 | xfrm_hash_free(net->xfrm.state_bysrc, sz); | |
d320bbb3 AD |
2309 | out_bysrc: |
2310 | xfrm_hash_free(net->xfrm.state_bydst, sz); | |
73d189dc AD |
2311 | out_bydst: |
2312 | return -ENOMEM; | |
d62ddc21 AD |
2313 | } |
2314 | ||
2315 | void xfrm_state_fini(struct net *net) | |
2316 | { | |
73d189dc AD |
2317 | unsigned int sz; |
2318 | ||
7c2776ee | 2319 | flush_work(&net->xfrm.state_hash_work); |
2e71029e | 2320 | xfrm_state_flush(net, IPSEC_PROTO_ANY, false); |
35db57bb | 2321 | flush_work(&xfrm_state_gc_work); |
7c2776ee | 2322 | |
9d4139c7 | 2323 | WARN_ON(!list_empty(&net->xfrm.state_all)); |
73d189dc | 2324 | |
529983ec | 2325 | sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head); |
b754a4fd AD |
2326 | WARN_ON(!hlist_empty(net->xfrm.state_byspi)); |
2327 | xfrm_hash_free(net->xfrm.state_byspi, sz); | |
d320bbb3 AD |
2328 | WARN_ON(!hlist_empty(net->xfrm.state_bysrc)); |
2329 | xfrm_hash_free(net->xfrm.state_bysrc, sz); | |
73d189dc AD |
2330 | WARN_ON(!hlist_empty(net->xfrm.state_bydst)); |
2331 | xfrm_hash_free(net->xfrm.state_bydst, sz); | |
1da177e4 LT |
2332 | } |
2333 | ||
ab5f5e8b | 2334 | #ifdef CONFIG_AUDITSYSCALL |
cf35f43e IJ |
2335 | static void xfrm_audit_helper_sainfo(struct xfrm_state *x, |
2336 | struct audit_buffer *audit_buf) | |
ab5f5e8b | 2337 | { |
68277acc PM |
2338 | struct xfrm_sec_ctx *ctx = x->security; |
2339 | u32 spi = ntohl(x->id.spi); | |
2340 | ||
2341 | if (ctx) | |
ab5f5e8b | 2342 | audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s", |
68277acc | 2343 | ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str); |
ab5f5e8b | 2344 | |
9b7a787d | 2345 | switch (x->props.family) { |
ab5f5e8b | 2346 | case AF_INET: |
21454aaa HH |
2347 | audit_log_format(audit_buf, " src=%pI4 dst=%pI4", |
2348 | &x->props.saddr.a4, &x->id.daddr.a4); | |
ab5f5e8b JL |
2349 | break; |
2350 | case AF_INET6: | |
5b095d98 | 2351 | audit_log_format(audit_buf, " src=%pI6 dst=%pI6", |
fdb46ee7 | 2352 | x->props.saddr.a6, x->id.daddr.a6); |
ab5f5e8b JL |
2353 | break; |
2354 | } | |
68277acc PM |
2355 | |
2356 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
ab5f5e8b JL |
2357 | } |
2358 | ||
cf35f43e IJ |
2359 | static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family, |
2360 | struct audit_buffer *audit_buf) | |
afeb14b4 | 2361 | { |
b71d1d42 ED |
2362 | const struct iphdr *iph4; |
2363 | const struct ipv6hdr *iph6; | |
afeb14b4 PM |
2364 | |
2365 | switch (family) { | |
2366 | case AF_INET: | |
2367 | iph4 = ip_hdr(skb); | |
21454aaa HH |
2368 | audit_log_format(audit_buf, " src=%pI4 dst=%pI4", |
2369 | &iph4->saddr, &iph4->daddr); | |
afeb14b4 PM |
2370 | break; |
2371 | case AF_INET6: | |
2372 | iph6 = ipv6_hdr(skb); | |
2373 | audit_log_format(audit_buf, | |
5b095d98 | 2374 | " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x", |
9b7a787d | 2375 | &iph6->saddr, &iph6->daddr, |
afeb14b4 PM |
2376 | iph6->flow_lbl[0] & 0x0f, |
2377 | iph6->flow_lbl[1], | |
2378 | iph6->flow_lbl[2]); | |
2379 | break; | |
2380 | } | |
2381 | } | |
2382 | ||
2e71029e | 2383 | void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid) |
ab5f5e8b JL |
2384 | { |
2385 | struct audit_buffer *audit_buf; | |
ab5f5e8b | 2386 | |
afeb14b4 | 2387 | audit_buf = xfrm_audit_start("SAD-add"); |
ab5f5e8b JL |
2388 | if (audit_buf == NULL) |
2389 | return; | |
2e71029e | 2390 | xfrm_audit_helper_usrinfo(task_valid, audit_buf); |
afeb14b4 PM |
2391 | xfrm_audit_helper_sainfo(x, audit_buf); |
2392 | audit_log_format(audit_buf, " res=%u", result); | |
ab5f5e8b JL |
2393 | audit_log_end(audit_buf); |
2394 | } | |
2395 | EXPORT_SYMBOL_GPL(xfrm_audit_state_add); | |
2396 | ||
2e71029e | 2397 | void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid) |
ab5f5e8b JL |
2398 | { |
2399 | struct audit_buffer *audit_buf; | |
ab5f5e8b | 2400 | |
afeb14b4 | 2401 | audit_buf = xfrm_audit_start("SAD-delete"); |
ab5f5e8b JL |
2402 | if (audit_buf == NULL) |
2403 | return; | |
2e71029e | 2404 | xfrm_audit_helper_usrinfo(task_valid, audit_buf); |
afeb14b4 PM |
2405 | xfrm_audit_helper_sainfo(x, audit_buf); |
2406 | audit_log_format(audit_buf, " res=%u", result); | |
ab5f5e8b JL |
2407 | audit_log_end(audit_buf); |
2408 | } | |
2409 | EXPORT_SYMBOL_GPL(xfrm_audit_state_delete); | |
afeb14b4 PM |
2410 | |
2411 | void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
2412 | struct sk_buff *skb) | |
2413 | { | |
2414 | struct audit_buffer *audit_buf; | |
2415 | u32 spi; | |
2416 | ||
2417 | audit_buf = xfrm_audit_start("SA-replay-overflow"); | |
2418 | if (audit_buf == NULL) | |
2419 | return; | |
2420 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2421 | /* don't record the sequence number because it's inherent in this kind | |
2422 | * of audit message */ | |
2423 | spi = ntohl(x->id.spi); | |
2424 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
2425 | audit_log_end(audit_buf); | |
2426 | } | |
2427 | EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow); | |
2428 | ||
9fdc4883 | 2429 | void xfrm_audit_state_replay(struct xfrm_state *x, |
afeb14b4 PM |
2430 | struct sk_buff *skb, __be32 net_seq) |
2431 | { | |
2432 | struct audit_buffer *audit_buf; | |
2433 | u32 spi; | |
2434 | ||
2435 | audit_buf = xfrm_audit_start("SA-replayed-pkt"); | |
2436 | if (audit_buf == NULL) | |
2437 | return; | |
2438 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2439 | spi = ntohl(x->id.spi); | |
2440 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2441 | spi, spi, ntohl(net_seq)); | |
2442 | audit_log_end(audit_buf); | |
2443 | } | |
9fdc4883 | 2444 | EXPORT_SYMBOL_GPL(xfrm_audit_state_replay); |
afeb14b4 PM |
2445 | |
2446 | void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family) | |
2447 | { | |
2448 | struct audit_buffer *audit_buf; | |
2449 | ||
2450 | audit_buf = xfrm_audit_start("SA-notfound"); | |
2451 | if (audit_buf == NULL) | |
2452 | return; | |
2453 | xfrm_audit_helper_pktinfo(skb, family, audit_buf); | |
2454 | audit_log_end(audit_buf); | |
2455 | } | |
2456 | EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple); | |
2457 | ||
2458 | void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
2459 | __be32 net_spi, __be32 net_seq) | |
2460 | { | |
2461 | struct audit_buffer *audit_buf; | |
2462 | u32 spi; | |
2463 | ||
2464 | audit_buf = xfrm_audit_start("SA-notfound"); | |
2465 | if (audit_buf == NULL) | |
2466 | return; | |
2467 | xfrm_audit_helper_pktinfo(skb, family, audit_buf); | |
2468 | spi = ntohl(net_spi); | |
2469 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2470 | spi, spi, ntohl(net_seq)); | |
2471 | audit_log_end(audit_buf); | |
2472 | } | |
2473 | EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound); | |
2474 | ||
2475 | void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
2476 | struct sk_buff *skb, u8 proto) | |
2477 | { | |
2478 | struct audit_buffer *audit_buf; | |
2479 | __be32 net_spi; | |
2480 | __be32 net_seq; | |
2481 | ||
2482 | audit_buf = xfrm_audit_start("SA-icv-failure"); | |
2483 | if (audit_buf == NULL) | |
2484 | return; | |
2485 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2486 | if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) { | |
2487 | u32 spi = ntohl(net_spi); | |
2488 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2489 | spi, spi, ntohl(net_seq)); | |
2490 | } | |
2491 | audit_log_end(audit_buf); | |
2492 | } | |
2493 | EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail); | |
ab5f5e8b | 2494 | #endif /* CONFIG_AUDITSYSCALL */ |