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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 | ||
2f10a61c SD |
316 | rcu_read_unlock(); |
317 | ||
ffdb5211 IT |
318 | if (!type && try_load) { |
319 | request_module("xfrm-offload-%d-%d", family, proto); | |
545d8ae7 | 320 | try_load = false; |
ffdb5211 IT |
321 | goto retry; |
322 | } | |
323 | ||
9d389d7f SK |
324 | return type; |
325 | } | |
326 | ||
327 | static void xfrm_put_type_offload(const struct xfrm_type_offload *type) | |
328 | { | |
329 | module_put(type->owner); | |
330 | } | |
331 | ||
7a9885b9 | 332 | static DEFINE_SPINLOCK(xfrm_mode_lock); |
aa5d62cc HX |
333 | int xfrm_register_mode(struct xfrm_mode *mode, int family) |
334 | { | |
335 | struct xfrm_state_afinfo *afinfo; | |
336 | struct xfrm_mode **modemap; | |
337 | int err; | |
338 | ||
339 | if (unlikely(mode->encap >= XFRM_MODE_MAX)) | |
340 | return -EINVAL; | |
341 | ||
7a9885b9 | 342 | afinfo = xfrm_state_get_afinfo(family); |
aa5d62cc HX |
343 | if (unlikely(afinfo == NULL)) |
344 | return -EAFNOSUPPORT; | |
345 | ||
346 | err = -EEXIST; | |
347 | modemap = afinfo->mode_map; | |
7a9885b9 | 348 | spin_lock_bh(&xfrm_mode_lock); |
17c2a42a HX |
349 | if (modemap[mode->encap]) |
350 | goto out; | |
aa5d62cc | 351 | |
17c2a42a HX |
352 | err = -ENOENT; |
353 | if (!try_module_get(afinfo->owner)) | |
354 | goto out; | |
355 | ||
356 | mode->afinfo = afinfo; | |
357 | modemap[mode->encap] = mode; | |
358 | err = 0; | |
359 | ||
360 | out: | |
7a9885b9 | 361 | spin_unlock_bh(&xfrm_mode_lock); |
af5d27c4 | 362 | rcu_read_unlock(); |
aa5d62cc HX |
363 | return err; |
364 | } | |
365 | EXPORT_SYMBOL(xfrm_register_mode); | |
366 | ||
367 | int xfrm_unregister_mode(struct xfrm_mode *mode, int family) | |
368 | { | |
369 | struct xfrm_state_afinfo *afinfo; | |
370 | struct xfrm_mode **modemap; | |
371 | int err; | |
372 | ||
373 | if (unlikely(mode->encap >= XFRM_MODE_MAX)) | |
374 | return -EINVAL; | |
375 | ||
7a9885b9 | 376 | afinfo = xfrm_state_get_afinfo(family); |
aa5d62cc HX |
377 | if (unlikely(afinfo == NULL)) |
378 | return -EAFNOSUPPORT; | |
379 | ||
380 | err = -ENOENT; | |
381 | modemap = afinfo->mode_map; | |
7a9885b9 | 382 | spin_lock_bh(&xfrm_mode_lock); |
aa5d62cc HX |
383 | if (likely(modemap[mode->encap] == mode)) { |
384 | modemap[mode->encap] = NULL; | |
17c2a42a | 385 | module_put(mode->afinfo->owner); |
aa5d62cc HX |
386 | err = 0; |
387 | } | |
388 | ||
7a9885b9 | 389 | spin_unlock_bh(&xfrm_mode_lock); |
af5d27c4 | 390 | rcu_read_unlock(); |
aa5d62cc HX |
391 | return err; |
392 | } | |
393 | EXPORT_SYMBOL(xfrm_unregister_mode); | |
394 | ||
395 | static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family) | |
396 | { | |
397 | struct xfrm_state_afinfo *afinfo; | |
398 | struct xfrm_mode *mode; | |
399 | int modload_attempted = 0; | |
400 | ||
401 | if (unlikely(encap >= XFRM_MODE_MAX)) | |
402 | return NULL; | |
403 | ||
404 | retry: | |
405 | afinfo = xfrm_state_get_afinfo(family); | |
406 | if (unlikely(afinfo == NULL)) | |
407 | return NULL; | |
408 | ||
75cda62d | 409 | mode = READ_ONCE(afinfo->mode_map[encap]); |
aa5d62cc HX |
410 | if (unlikely(mode && !try_module_get(mode->owner))) |
411 | mode = NULL; | |
75cda62d FW |
412 | |
413 | rcu_read_unlock(); | |
aa5d62cc | 414 | if (!mode && !modload_attempted) { |
aa5d62cc HX |
415 | request_module("xfrm-mode-%d-%d", family, encap); |
416 | modload_attempted = 1; | |
417 | goto retry; | |
418 | } | |
419 | ||
aa5d62cc HX |
420 | return mode; |
421 | } | |
422 | ||
423 | static void xfrm_put_mode(struct xfrm_mode *mode) | |
424 | { | |
425 | module_put(mode->owner); | |
426 | } | |
427 | ||
1da177e4 LT |
428 | static void xfrm_state_gc_destroy(struct xfrm_state *x) |
429 | { | |
9e0d57fd | 430 | tasklet_hrtimer_cancel(&x->mtimer); |
a47f0ce0 | 431 | del_timer_sync(&x->rtimer); |
b5884793 | 432 | kfree(x->aead); |
a51482bd JJ |
433 | kfree(x->aalg); |
434 | kfree(x->ealg); | |
435 | kfree(x->calg); | |
436 | kfree(x->encap); | |
060f02a3 | 437 | kfree(x->coaddr); |
d8647b79 SK |
438 | kfree(x->replay_esn); |
439 | kfree(x->preplay_esn); | |
13996378 HX |
440 | if (x->inner_mode) |
441 | xfrm_put_mode(x->inner_mode); | |
df9dcb45 KM |
442 | if (x->inner_mode_iaf) |
443 | xfrm_put_mode(x->inner_mode_iaf); | |
13996378 HX |
444 | if (x->outer_mode) |
445 | xfrm_put_mode(x->outer_mode); | |
9d389d7f SK |
446 | if (x->type_offload) |
447 | xfrm_put_type_offload(x->type_offload); | |
1da177e4 LT |
448 | if (x->type) { |
449 | x->type->destructor(x); | |
450 | xfrm_put_type(x->type); | |
451 | } | |
d77e38e6 | 452 | xfrm_dev_state_free(x); |
df71837d | 453 | security_xfrm_state_free(x); |
1da177e4 LT |
454 | kfree(x); |
455 | } | |
456 | ||
c7837144 | 457 | static void xfrm_state_gc_task(struct work_struct *work) |
1da177e4 | 458 | { |
12a169e7 | 459 | struct xfrm_state *x; |
b67bfe0d | 460 | struct hlist_node *tmp; |
12a169e7 | 461 | struct hlist_head gc_list; |
1da177e4 | 462 | |
1da177e4 | 463 | spin_lock_bh(&xfrm_state_gc_lock); |
35db57bb | 464 | hlist_move_list(&xfrm_state_gc_list, &gc_list); |
1da177e4 LT |
465 | spin_unlock_bh(&xfrm_state_gc_lock); |
466 | ||
df7274eb FW |
467 | synchronize_rcu(); |
468 | ||
b67bfe0d | 469 | hlist_for_each_entry_safe(x, tmp, &gc_list, gclist) |
1da177e4 | 470 | xfrm_state_gc_destroy(x); |
1da177e4 LT |
471 | } |
472 | ||
3e94c2dc | 473 | static enum hrtimer_restart xfrm_timer_handler(struct hrtimer *me) |
1da177e4 | 474 | { |
9e0d57fd YP |
475 | struct tasklet_hrtimer *thr = container_of(me, struct tasklet_hrtimer, timer); |
476 | struct xfrm_state *x = container_of(thr, struct xfrm_state, mtimer); | |
9d729f72 | 477 | unsigned long now = get_seconds(); |
1da177e4 LT |
478 | long next = LONG_MAX; |
479 | int warn = 0; | |
161a09e7 | 480 | int err = 0; |
1da177e4 LT |
481 | |
482 | spin_lock(&x->lock); | |
483 | if (x->km.state == XFRM_STATE_DEAD) | |
484 | goto out; | |
485 | if (x->km.state == XFRM_STATE_EXPIRED) | |
486 | goto expired; | |
487 | if (x->lft.hard_add_expires_seconds) { | |
488 | long tmo = x->lft.hard_add_expires_seconds + | |
489 | x->curlft.add_time - now; | |
e3c0d047 FD |
490 | if (tmo <= 0) { |
491 | if (x->xflags & XFRM_SOFT_EXPIRE) { | |
492 | /* enter hard expire without soft expire first?! | |
493 | * setting a new date could trigger this. | |
1365e547 | 494 | * workaround: fix x->curflt.add_time by below: |
e3c0d047 FD |
495 | */ |
496 | x->curlft.add_time = now - x->saved_tmo - 1; | |
497 | tmo = x->lft.hard_add_expires_seconds - x->saved_tmo; | |
498 | } else | |
499 | goto expired; | |
500 | } | |
1da177e4 LT |
501 | if (tmo < next) |
502 | next = tmo; | |
503 | } | |
504 | if (x->lft.hard_use_expires_seconds) { | |
505 | long tmo = x->lft.hard_use_expires_seconds + | |
506 | (x->curlft.use_time ? : now) - now; | |
507 | if (tmo <= 0) | |
508 | goto expired; | |
509 | if (tmo < next) | |
510 | next = tmo; | |
511 | } | |
512 | if (x->km.dying) | |
513 | goto resched; | |
514 | if (x->lft.soft_add_expires_seconds) { | |
515 | long tmo = x->lft.soft_add_expires_seconds + | |
516 | x->curlft.add_time - now; | |
e3c0d047 | 517 | if (tmo <= 0) { |
1da177e4 | 518 | warn = 1; |
e3c0d047 FD |
519 | x->xflags &= ~XFRM_SOFT_EXPIRE; |
520 | } else if (tmo < next) { | |
1da177e4 | 521 | next = tmo; |
e3c0d047 FD |
522 | x->xflags |= XFRM_SOFT_EXPIRE; |
523 | x->saved_tmo = tmo; | |
524 | } | |
1da177e4 LT |
525 | } |
526 | if (x->lft.soft_use_expires_seconds) { | |
527 | long tmo = x->lft.soft_use_expires_seconds + | |
528 | (x->curlft.use_time ? : now) - now; | |
529 | if (tmo <= 0) | |
530 | warn = 1; | |
531 | else if (tmo < next) | |
532 | next = tmo; | |
533 | } | |
534 | ||
4666faab | 535 | x->km.dying = warn; |
1da177e4 | 536 | if (warn) |
53bc6b4d | 537 | km_state_expired(x, 0, 0); |
1da177e4 | 538 | resched: |
9b7a787d | 539 | if (next != LONG_MAX) { |
9e0d57fd YP |
540 | tasklet_hrtimer_start(&x->mtimer, ktime_set(next, 0), HRTIMER_MODE_REL); |
541 | } | |
a47f0ce0 | 542 | |
1da177e4 LT |
543 | goto out; |
544 | ||
545 | expired: | |
5b8ef341 | 546 | if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) |
1da177e4 | 547 | x->km.state = XFRM_STATE_EXPIRED; |
161a09e7 JL |
548 | |
549 | err = __xfrm_state_delete(x); | |
0806ae4c | 550 | if (!err) |
53bc6b4d | 551 | km_state_expired(x, 1, 0); |
1da177e4 | 552 | |
2e71029e | 553 | xfrm_audit_state_delete(x, err ? 0 : 1, true); |
161a09e7 | 554 | |
1da177e4 LT |
555 | out: |
556 | spin_unlock(&x->lock); | |
9e0d57fd | 557 | return HRTIMER_NORESTART; |
1da177e4 LT |
558 | } |
559 | ||
e99e88a9 | 560 | static void xfrm_replay_timer_handler(struct timer_list *t); |
0ac84752 | 561 | |
673c09be | 562 | struct xfrm_state *xfrm_state_alloc(struct net *net) |
1da177e4 LT |
563 | { |
564 | struct xfrm_state *x; | |
565 | ||
0da974f4 | 566 | x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC); |
1da177e4 LT |
567 | |
568 | if (x) { | |
673c09be | 569 | write_pnet(&x->xs_net, net); |
88755e9c | 570 | refcount_set(&x->refcnt, 1); |
1da177e4 | 571 | atomic_set(&x->tunnel_users, 0); |
12a169e7 | 572 | INIT_LIST_HEAD(&x->km.all); |
8f126e37 DM |
573 | INIT_HLIST_NODE(&x->bydst); |
574 | INIT_HLIST_NODE(&x->bysrc); | |
575 | INIT_HLIST_NODE(&x->byspi); | |
99565a6c FD |
576 | tasklet_hrtimer_init(&x->mtimer, xfrm_timer_handler, |
577 | CLOCK_BOOTTIME, HRTIMER_MODE_ABS); | |
e99e88a9 | 578 | timer_setup(&x->rtimer, xfrm_replay_timer_handler, 0); |
9d729f72 | 579 | x->curlft.add_time = get_seconds(); |
1da177e4 LT |
580 | x->lft.soft_byte_limit = XFRM_INF; |
581 | x->lft.soft_packet_limit = XFRM_INF; | |
582 | x->lft.hard_byte_limit = XFRM_INF; | |
583 | x->lft.hard_packet_limit = XFRM_INF; | |
f8cd5488 JHS |
584 | x->replay_maxage = 0; |
585 | x->replay_maxdiff = 0; | |
df9dcb45 KM |
586 | x->inner_mode = NULL; |
587 | x->inner_mode_iaf = NULL; | |
1da177e4 LT |
588 | spin_lock_init(&x->lock); |
589 | } | |
590 | return x; | |
591 | } | |
592 | EXPORT_SYMBOL(xfrm_state_alloc); | |
593 | ||
594 | void __xfrm_state_destroy(struct xfrm_state *x) | |
595 | { | |
547b792c | 596 | WARN_ON(x->km.state != XFRM_STATE_DEAD); |
1da177e4 LT |
597 | |
598 | spin_lock_bh(&xfrm_state_gc_lock); | |
35db57bb | 599 | hlist_add_head(&x->gclist, &xfrm_state_gc_list); |
1da177e4 | 600 | spin_unlock_bh(&xfrm_state_gc_lock); |
35db57bb | 601 | schedule_work(&xfrm_state_gc_work); |
1da177e4 LT |
602 | } |
603 | EXPORT_SYMBOL(__xfrm_state_destroy); | |
604 | ||
53bc6b4d | 605 | int __xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 606 | { |
98806f75 | 607 | struct net *net = xs_net(x); |
26b15dad JHS |
608 | int err = -ESRCH; |
609 | ||
1da177e4 LT |
610 | if (x->km.state != XFRM_STATE_DEAD) { |
611 | x->km.state = XFRM_STATE_DEAD; | |
283bc9f3 | 612 | spin_lock(&net->xfrm.xfrm_state_lock); |
12a169e7 | 613 | list_del(&x->km.all); |
ae3fb6d3 FW |
614 | hlist_del_rcu(&x->bydst); |
615 | hlist_del_rcu(&x->bysrc); | |
a47f0ce0 | 616 | if (x->id.spi) |
ae3fb6d3 | 617 | hlist_del_rcu(&x->byspi); |
98806f75 | 618 | net->xfrm.state_num--; |
283bc9f3 | 619 | spin_unlock(&net->xfrm.xfrm_state_lock); |
1da177e4 | 620 | |
d77e38e6 SK |
621 | xfrm_dev_state_delete(x); |
622 | ||
1da177e4 LT |
623 | /* All xfrm_state objects are created by xfrm_state_alloc. |
624 | * The xfrm_state_alloc call gives a reference, and that | |
625 | * is what we are dropping here. | |
626 | */ | |
5dba4797 | 627 | xfrm_state_put(x); |
26b15dad | 628 | err = 0; |
1da177e4 | 629 | } |
26b15dad JHS |
630 | |
631 | return err; | |
1da177e4 | 632 | } |
53bc6b4d | 633 | EXPORT_SYMBOL(__xfrm_state_delete); |
1da177e4 | 634 | |
26b15dad | 635 | int xfrm_state_delete(struct xfrm_state *x) |
1da177e4 | 636 | { |
26b15dad JHS |
637 | int err; |
638 | ||
1da177e4 | 639 | spin_lock_bh(&x->lock); |
26b15dad | 640 | err = __xfrm_state_delete(x); |
1da177e4 | 641 | spin_unlock_bh(&x->lock); |
26b15dad JHS |
642 | |
643 | return err; | |
1da177e4 LT |
644 | } |
645 | EXPORT_SYMBOL(xfrm_state_delete); | |
646 | ||
4aa2e62c JL |
647 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
648 | static inline int | |
2e71029e | 649 | xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid) |
1da177e4 | 650 | { |
4aa2e62c JL |
651 | int i, err = 0; |
652 | ||
0e602451 | 653 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
4aa2e62c JL |
654 | struct xfrm_state *x; |
655 | ||
b67bfe0d | 656 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
4aa2e62c JL |
657 | if (xfrm_id_proto_match(x->id.proto, proto) && |
658 | (err = security_xfrm_state_delete(x)) != 0) { | |
2e71029e | 659 | xfrm_audit_state_delete(x, 0, task_valid); |
4aa2e62c JL |
660 | return err; |
661 | } | |
662 | } | |
663 | } | |
664 | ||
665 | return err; | |
666 | } | |
d77e38e6 SK |
667 | |
668 | static inline int | |
669 | xfrm_dev_state_flush_secctx_check(struct net *net, struct net_device *dev, bool task_valid) | |
670 | { | |
671 | int i, err = 0; | |
672 | ||
673 | for (i = 0; i <= net->xfrm.state_hmask; i++) { | |
674 | struct xfrm_state *x; | |
675 | struct xfrm_state_offload *xso; | |
676 | ||
677 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { | |
678 | xso = &x->xso; | |
679 | ||
680 | if (xso->dev == dev && | |
681 | (err = security_xfrm_state_delete(x)) != 0) { | |
682 | xfrm_audit_state_delete(x, 0, task_valid); | |
683 | return err; | |
684 | } | |
685 | } | |
686 | } | |
687 | ||
688 | return err; | |
689 | } | |
4aa2e62c JL |
690 | #else |
691 | static inline int | |
2e71029e | 692 | xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid) |
4aa2e62c JL |
693 | { |
694 | return 0; | |
695 | } | |
d77e38e6 SK |
696 | |
697 | static inline int | |
698 | xfrm_dev_state_flush_secctx_check(struct net *net, struct net_device *dev, bool task_valid) | |
699 | { | |
700 | return 0; | |
701 | } | |
4aa2e62c JL |
702 | #endif |
703 | ||
2e71029e | 704 | int xfrm_state_flush(struct net *net, u8 proto, bool task_valid) |
4aa2e62c | 705 | { |
9e64cc95 | 706 | int i, err = 0, cnt = 0; |
1da177e4 | 707 | |
283bc9f3 | 708 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
2e71029e | 709 | err = xfrm_state_flush_secctx_check(net, proto, task_valid); |
4aa2e62c JL |
710 | if (err) |
711 | goto out; | |
712 | ||
9e64cc95 | 713 | err = -ESRCH; |
0e602451 | 714 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
8f126e37 | 715 | struct xfrm_state *x; |
1da177e4 | 716 | restart: |
b67bfe0d | 717 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
1da177e4 | 718 | if (!xfrm_state_kern(x) && |
5794708f | 719 | xfrm_id_proto_match(x->id.proto, proto)) { |
1da177e4 | 720 | xfrm_state_hold(x); |
283bc9f3 | 721 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 722 | |
161a09e7 | 723 | err = xfrm_state_delete(x); |
ab5f5e8b | 724 | xfrm_audit_state_delete(x, err ? 0 : 1, |
2e71029e | 725 | task_valid); |
1da177e4 | 726 | xfrm_state_put(x); |
9e64cc95 JHS |
727 | if (!err) |
728 | cnt++; | |
1da177e4 | 729 | |
283bc9f3 | 730 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
731 | goto restart; |
732 | } | |
733 | } | |
734 | } | |
dd269db8 AS |
735 | out: |
736 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); | |
ec30d78c | 737 | if (cnt) { |
9e64cc95 | 738 | err = 0; |
ec30d78c FW |
739 | xfrm_policy_cache_flush(); |
740 | } | |
4aa2e62c | 741 | return err; |
1da177e4 LT |
742 | } |
743 | EXPORT_SYMBOL(xfrm_state_flush); | |
744 | ||
d77e38e6 SK |
745 | int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid) |
746 | { | |
747 | int i, err = 0, cnt = 0; | |
748 | ||
749 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
750 | err = xfrm_dev_state_flush_secctx_check(net, dev, task_valid); | |
751 | if (err) | |
752 | goto out; | |
753 | ||
754 | err = -ESRCH; | |
755 | for (i = 0; i <= net->xfrm.state_hmask; i++) { | |
756 | struct xfrm_state *x; | |
757 | struct xfrm_state_offload *xso; | |
758 | restart: | |
759 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { | |
760 | xso = &x->xso; | |
761 | ||
762 | if (!xfrm_state_kern(x) && xso->dev == dev) { | |
763 | xfrm_state_hold(x); | |
764 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); | |
765 | ||
766 | err = xfrm_state_delete(x); | |
767 | xfrm_audit_state_delete(x, err ? 0 : 1, | |
768 | task_valid); | |
769 | xfrm_state_put(x); | |
770 | if (!err) | |
771 | cnt++; | |
772 | ||
773 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
774 | goto restart; | |
775 | } | |
776 | } | |
777 | } | |
778 | if (cnt) | |
779 | err = 0; | |
780 | ||
781 | out: | |
782 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); | |
783 | return err; | |
784 | } | |
785 | EXPORT_SYMBOL(xfrm_dev_state_flush); | |
786 | ||
e071041b | 787 | void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si) |
28d8909b | 788 | { |
283bc9f3 | 789 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
e071041b AD |
790 | si->sadcnt = net->xfrm.state_num; |
791 | si->sadhcnt = net->xfrm.state_hmask; | |
28d8909b | 792 | si->sadhmcnt = xfrm_state_hashmax; |
283bc9f3 | 793 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
28d8909b JHS |
794 | } |
795 | EXPORT_SYMBOL(xfrm_sad_getinfo); | |
796 | ||
711059b9 | 797 | static void |
1a898592 | 798 | xfrm_init_tempstate(struct xfrm_state *x, const struct flowi *fl, |
04686013 | 799 | const struct xfrm_tmpl *tmpl, |
33765d06 | 800 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
8444cf71 | 801 | unsigned short family) |
1da177e4 | 802 | { |
711059b9 FW |
803 | struct xfrm_state_afinfo *afinfo = xfrm_state_afinfo_get_rcu(family); |
804 | ||
3819a35f FW |
805 | if (!afinfo) |
806 | return; | |
807 | ||
808 | afinfo->init_tempsel(&x->sel, fl); | |
8444cf71 TE |
809 | |
810 | if (family != tmpl->encap_family) { | |
711059b9 | 811 | afinfo = xfrm_state_afinfo_get_rcu(tmpl->encap_family); |
8444cf71 | 812 | if (!afinfo) |
711059b9 | 813 | return; |
8444cf71 TE |
814 | } |
815 | afinfo->init_temprop(x, tmpl, daddr, saddr); | |
1da177e4 LT |
816 | } |
817 | ||
9aa60088 DM |
818 | static struct xfrm_state *__xfrm_state_lookup(struct net *net, u32 mark, |
819 | const xfrm_address_t *daddr, | |
820 | __be32 spi, u8 proto, | |
821 | unsigned short family) | |
edcd5821 | 822 | { |
221df1ed | 823 | unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family); |
edcd5821 DM |
824 | struct xfrm_state *x; |
825 | ||
ae3fb6d3 | 826 | hlist_for_each_entry_rcu(x, net->xfrm.state_byspi + h, byspi) { |
edcd5821 DM |
827 | if (x->props.family != family || |
828 | x->id.spi != spi || | |
1802571b | 829 | x->id.proto != proto || |
70e94e66 | 830 | !xfrm_addr_equal(&x->id.daddr, daddr, family)) |
edcd5821 DM |
831 | continue; |
832 | ||
3d6acfa7 JHS |
833 | if ((mark & x->mark.m) != x->mark.v) |
834 | continue; | |
02efdff7 FW |
835 | if (!xfrm_state_hold_rcu(x)) |
836 | continue; | |
edcd5821 DM |
837 | return x; |
838 | } | |
839 | ||
840 | return NULL; | |
841 | } | |
842 | ||
9aa60088 DM |
843 | static struct xfrm_state *__xfrm_state_lookup_byaddr(struct net *net, u32 mark, |
844 | const xfrm_address_t *daddr, | |
845 | const xfrm_address_t *saddr, | |
846 | u8 proto, unsigned short family) | |
edcd5821 | 847 | { |
221df1ed | 848 | unsigned int h = xfrm_src_hash(net, daddr, saddr, family); |
edcd5821 DM |
849 | struct xfrm_state *x; |
850 | ||
ae3fb6d3 | 851 | hlist_for_each_entry_rcu(x, net->xfrm.state_bysrc + h, bysrc) { |
edcd5821 | 852 | if (x->props.family != family || |
1802571b | 853 | x->id.proto != proto || |
70e94e66 YH |
854 | !xfrm_addr_equal(&x->id.daddr, daddr, family) || |
855 | !xfrm_addr_equal(&x->props.saddr, saddr, family)) | |
edcd5821 DM |
856 | continue; |
857 | ||
3d6acfa7 JHS |
858 | if ((mark & x->mark.m) != x->mark.v) |
859 | continue; | |
02efdff7 FW |
860 | if (!xfrm_state_hold_rcu(x)) |
861 | continue; | |
edcd5821 DM |
862 | return x; |
863 | } | |
864 | ||
865 | return NULL; | |
866 | } | |
867 | ||
868 | static inline struct xfrm_state * | |
869 | __xfrm_state_locate(struct xfrm_state *x, int use_spi, int family) | |
870 | { | |
221df1ed | 871 | struct net *net = xs_net(x); |
bd55775c | 872 | u32 mark = x->mark.v & x->mark.m; |
221df1ed | 873 | |
edcd5821 | 874 | if (use_spi) |
bd55775c JHS |
875 | return __xfrm_state_lookup(net, mark, &x->id.daddr, |
876 | x->id.spi, x->id.proto, family); | |
edcd5821 | 877 | else |
bd55775c JHS |
878 | return __xfrm_state_lookup_byaddr(net, mark, |
879 | &x->id.daddr, | |
edcd5821 DM |
880 | &x->props.saddr, |
881 | x->id.proto, family); | |
882 | } | |
883 | ||
98806f75 | 884 | static void xfrm_hash_grow_check(struct net *net, int have_hash_collision) |
2fab22f2 PM |
885 | { |
886 | if (have_hash_collision && | |
98806f75 AD |
887 | (net->xfrm.state_hmask + 1) < xfrm_state_hashmax && |
888 | net->xfrm.state_num > net->xfrm.state_hmask) | |
889 | schedule_work(&net->xfrm.state_hash_work); | |
2fab22f2 PM |
890 | } |
891 | ||
08ec9af1 | 892 | static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x, |
4a08ab0f | 893 | const struct flowi *fl, unsigned short family, |
08ec9af1 DM |
894 | struct xfrm_state **best, int *acq_in_progress, |
895 | int *error) | |
896 | { | |
897 | /* Resolution logic: | |
898 | * 1. There is a valid state with matching selector. Done. | |
899 | * 2. Valid state with inappropriate selector. Skip. | |
900 | * | |
901 | * Entering area of "sysdeps". | |
902 | * | |
903 | * 3. If state is not valid, selector is temporary, it selects | |
904 | * only session which triggered previous resolution. Key | |
905 | * manager will do something to install a state with proper | |
906 | * selector. | |
907 | */ | |
908 | if (x->km.state == XFRM_STATE_VALID) { | |
909 | if ((x->sel.family && | |
910 | !xfrm_selector_match(&x->sel, fl, x->sel.family)) || | |
911 | !security_xfrm_state_pol_flow_match(x, pol, fl)) | |
912 | return; | |
913 | ||
914 | if (!*best || | |
915 | (*best)->km.dying > x->km.dying || | |
916 | ((*best)->km.dying == x->km.dying && | |
917 | (*best)->curlft.add_time < x->curlft.add_time)) | |
918 | *best = x; | |
919 | } else if (x->km.state == XFRM_STATE_ACQ) { | |
920 | *acq_in_progress = 1; | |
921 | } else if (x->km.state == XFRM_STATE_ERROR || | |
922 | x->km.state == XFRM_STATE_EXPIRED) { | |
923 | if (xfrm_selector_match(&x->sel, fl, x->sel.family) && | |
924 | security_xfrm_state_pol_flow_match(x, pol, fl)) | |
925 | *error = -ESRCH; | |
926 | } | |
927 | } | |
928 | ||
1da177e4 | 929 | struct xfrm_state * |
33765d06 | 930 | xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
b520e9f6 | 931 | const struct flowi *fl, struct xfrm_tmpl *tmpl, |
1da177e4 LT |
932 | struct xfrm_policy *pol, int *err, |
933 | unsigned short family) | |
934 | { | |
08ec9af1 | 935 | static xfrm_address_t saddr_wildcard = { }; |
5447c5e4 | 936 | struct net *net = xp_net(pol); |
6a783c90 | 937 | unsigned int h, h_wildcard; |
37b08e34 | 938 | struct xfrm_state *x, *x0, *to_put; |
1da177e4 LT |
939 | int acquire_in_progress = 0; |
940 | int error = 0; | |
941 | struct xfrm_state *best = NULL; | |
bd55775c | 942 | u32 mark = pol->mark.v & pol->mark.m; |
8444cf71 | 943 | unsigned short encap_family = tmpl->encap_family; |
b65e3d7b | 944 | unsigned int sequence; |
0f24558e | 945 | struct km_event c; |
a716c119 | 946 | |
37b08e34 DM |
947 | to_put = NULL; |
948 | ||
b65e3d7b FW |
949 | sequence = read_seqcount_begin(&xfrm_state_hash_generation); |
950 | ||
d737a580 | 951 | rcu_read_lock(); |
8444cf71 | 952 | h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family); |
ae3fb6d3 | 953 | hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h, bydst) { |
8444cf71 | 954 | if (x->props.family == encap_family && |
1da177e4 | 955 | x->props.reqid == tmpl->reqid && |
3d6acfa7 | 956 | (mark & x->mark.m) == x->mark.v && |
fbd9a5b4 | 957 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
8444cf71 | 958 | xfrm_state_addr_check(x, daddr, saddr, encap_family) && |
1da177e4 LT |
959 | tmpl->mode == x->props.mode && |
960 | tmpl->id.proto == x->id.proto && | |
08ec9af1 | 961 | (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) |
1f673c5f | 962 | xfrm_state_look_at(pol, x, fl, encap_family, |
08ec9af1 DM |
963 | &best, &acquire_in_progress, &error); |
964 | } | |
6f115638 | 965 | if (best || acquire_in_progress) |
08ec9af1 DM |
966 | goto found; |
967 | ||
8444cf71 | 968 | h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, encap_family); |
ae3fb6d3 | 969 | hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h_wildcard, bydst) { |
8444cf71 | 970 | if (x->props.family == encap_family && |
08ec9af1 | 971 | x->props.reqid == tmpl->reqid && |
3d6acfa7 | 972 | (mark & x->mark.m) == x->mark.v && |
08ec9af1 | 973 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
f59bbdfa | 974 | xfrm_addr_equal(&x->id.daddr, daddr, encap_family) && |
08ec9af1 DM |
975 | tmpl->mode == x->props.mode && |
976 | tmpl->id.proto == x->id.proto && | |
977 | (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) | |
1f673c5f | 978 | xfrm_state_look_at(pol, x, fl, encap_family, |
08ec9af1 | 979 | &best, &acquire_in_progress, &error); |
1da177e4 LT |
980 | } |
981 | ||
08ec9af1 | 982 | found: |
1da177e4 LT |
983 | x = best; |
984 | if (!x && !error && !acquire_in_progress) { | |
5c5d281a | 985 | if (tmpl->id.spi && |
bd55775c | 986 | (x0 = __xfrm_state_lookup(net, mark, daddr, tmpl->id.spi, |
8444cf71 | 987 | tmpl->id.proto, encap_family)) != NULL) { |
37b08e34 | 988 | to_put = x0; |
1da177e4 LT |
989 | error = -EEXIST; |
990 | goto out; | |
991 | } | |
0f24558e HG |
992 | |
993 | c.net = net; | |
994 | /* If the KMs have no listeners (yet...), avoid allocating an SA | |
995 | * for each and every packet - garbage collection might not | |
996 | * handle the flood. | |
997 | */ | |
998 | if (!km_is_alive(&c)) { | |
999 | error = -ESRCH; | |
1000 | goto out; | |
1001 | } | |
1002 | ||
5447c5e4 | 1003 | x = xfrm_state_alloc(net); |
1da177e4 LT |
1004 | if (x == NULL) { |
1005 | error = -ENOMEM; | |
1006 | goto out; | |
1007 | } | |
8444cf71 | 1008 | /* Initialize temporary state matching only |
1da177e4 | 1009 | * to current session. */ |
8444cf71 | 1010 | xfrm_init_tempstate(x, fl, tmpl, daddr, saddr, family); |
bd55775c | 1011 | memcpy(&x->mark, &pol->mark, sizeof(x->mark)); |
1da177e4 | 1012 | |
1d28f42c | 1013 | error = security_xfrm_state_alloc_acquire(x, pol->security, fl->flowi_secid); |
e0d1caa7 VY |
1014 | if (error) { |
1015 | x->km.state = XFRM_STATE_DEAD; | |
37b08e34 | 1016 | to_put = x; |
e0d1caa7 VY |
1017 | x = NULL; |
1018 | goto out; | |
1019 | } | |
1020 | ||
1da177e4 | 1021 | if (km_query(x, tmpl, pol) == 0) { |
d737a580 | 1022 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 1023 | x->km.state = XFRM_STATE_ACQ; |
5447c5e4 | 1024 | list_add(&x->km.all, &net->xfrm.state_all); |
ae3fb6d3 | 1025 | hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h); |
8444cf71 | 1026 | h = xfrm_src_hash(net, daddr, saddr, encap_family); |
ae3fb6d3 | 1027 | hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h); |
1da177e4 | 1028 | if (x->id.spi) { |
8444cf71 | 1029 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, encap_family); |
ae3fb6d3 | 1030 | hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h); |
1da177e4 | 1031 | } |
b27aeadb | 1032 | x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires; |
9e0d57fd | 1033 | tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL); |
5447c5e4 AD |
1034 | net->xfrm.state_num++; |
1035 | xfrm_hash_grow_check(net, x->bydst.next != NULL); | |
d737a580 | 1036 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1037 | } else { |
1038 | x->km.state = XFRM_STATE_DEAD; | |
37b08e34 | 1039 | to_put = x; |
1da177e4 LT |
1040 | x = NULL; |
1041 | error = -ESRCH; | |
1042 | } | |
1043 | } | |
1044 | out: | |
02efdff7 FW |
1045 | if (x) { |
1046 | if (!xfrm_state_hold_rcu(x)) { | |
1047 | *err = -EAGAIN; | |
1048 | x = NULL; | |
1049 | } | |
1050 | } else { | |
1da177e4 | 1051 | *err = acquire_in_progress ? -EAGAIN : error; |
02efdff7 | 1052 | } |
d737a580 | 1053 | rcu_read_unlock(); |
37b08e34 DM |
1054 | if (to_put) |
1055 | xfrm_state_put(to_put); | |
b65e3d7b FW |
1056 | |
1057 | if (read_seqcount_retry(&xfrm_state_hash_generation, sequence)) { | |
1058 | *err = -EAGAIN; | |
1059 | if (x) { | |
1060 | xfrm_state_put(x); | |
1061 | x = NULL; | |
1062 | } | |
1063 | } | |
1064 | ||
1da177e4 LT |
1065 | return x; |
1066 | } | |
1067 | ||
628529b6 | 1068 | struct xfrm_state * |
bd55775c | 1069 | xfrm_stateonly_find(struct net *net, u32 mark, |
5447c5e4 | 1070 | xfrm_address_t *daddr, xfrm_address_t *saddr, |
628529b6 JHS |
1071 | unsigned short family, u8 mode, u8 proto, u32 reqid) |
1072 | { | |
4bda4f25 | 1073 | unsigned int h; |
628529b6 | 1074 | struct xfrm_state *rx = NULL, *x = NULL; |
628529b6 | 1075 | |
4ae770bf | 1076 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
5447c5e4 | 1077 | h = xfrm_dst_hash(net, daddr, saddr, reqid, family); |
b67bfe0d | 1078 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
628529b6 JHS |
1079 | if (x->props.family == family && |
1080 | x->props.reqid == reqid && | |
3d6acfa7 | 1081 | (mark & x->mark.m) == x->mark.v && |
628529b6 JHS |
1082 | !(x->props.flags & XFRM_STATE_WILDRECV) && |
1083 | xfrm_state_addr_check(x, daddr, saddr, family) && | |
1084 | mode == x->props.mode && | |
1085 | proto == x->id.proto && | |
1086 | x->km.state == XFRM_STATE_VALID) { | |
1087 | rx = x; | |
1088 | break; | |
1089 | } | |
1090 | } | |
1091 | ||
1092 | if (rx) | |
1093 | xfrm_state_hold(rx); | |
4ae770bf | 1094 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
628529b6 JHS |
1095 | |
1096 | ||
1097 | return rx; | |
1098 | } | |
1099 | EXPORT_SYMBOL(xfrm_stateonly_find); | |
1100 | ||
c454997e FD |
1101 | struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi, |
1102 | unsigned short family) | |
1103 | { | |
1104 | struct xfrm_state *x; | |
1105 | struct xfrm_state_walk *w; | |
1106 | ||
1107 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
1108 | list_for_each_entry(w, &net->xfrm.state_all, all) { | |
1109 | x = container_of(w, struct xfrm_state, km); | |
1110 | if (x->props.family != family || | |
1111 | x->id.spi != spi) | |
1112 | continue; | |
1113 | ||
c454997e | 1114 | xfrm_state_hold(x); |
bdddbf69 | 1115 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
c454997e FD |
1116 | return x; |
1117 | } | |
1118 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); | |
1119 | return NULL; | |
1120 | } | |
1121 | EXPORT_SYMBOL(xfrm_state_lookup_byspi); | |
1122 | ||
1da177e4 LT |
1123 | static void __xfrm_state_insert(struct xfrm_state *x) |
1124 | { | |
98806f75 | 1125 | struct net *net = xs_net(x); |
a624c108 | 1126 | unsigned int h; |
1da177e4 | 1127 | |
98806f75 | 1128 | list_add(&x->km.all, &net->xfrm.state_all); |
4c563f76 | 1129 | |
98806f75 | 1130 | h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr, |
c1969f29 | 1131 | x->props.reqid, x->props.family); |
ae3fb6d3 | 1132 | hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h); |
1da177e4 | 1133 | |
98806f75 | 1134 | h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family); |
ae3fb6d3 | 1135 | hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h); |
1da177e4 | 1136 | |
7b4dc360 | 1137 | if (x->id.spi) { |
98806f75 | 1138 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, |
6c44e6b7 MN |
1139 | x->props.family); |
1140 | ||
ae3fb6d3 | 1141 | hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h); |
6c44e6b7 MN |
1142 | } |
1143 | ||
9e0d57fd | 1144 | tasklet_hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL); |
a47f0ce0 DM |
1145 | if (x->replay_maxage) |
1146 | mod_timer(&x->rtimer, jiffies + x->replay_maxage); | |
f8cd5488 | 1147 | |
98806f75 | 1148 | net->xfrm.state_num++; |
f034b5d4 | 1149 | |
98806f75 | 1150 | xfrm_hash_grow_check(net, x->bydst.next != NULL); |
1da177e4 LT |
1151 | } |
1152 | ||
283bc9f3 | 1153 | /* net->xfrm.xfrm_state_lock is held */ |
c7f5ea3a DM |
1154 | static void __xfrm_state_bump_genids(struct xfrm_state *xnew) |
1155 | { | |
98806f75 | 1156 | struct net *net = xs_net(xnew); |
c7f5ea3a DM |
1157 | unsigned short family = xnew->props.family; |
1158 | u32 reqid = xnew->props.reqid; | |
1159 | struct xfrm_state *x; | |
c7f5ea3a | 1160 | unsigned int h; |
3d6acfa7 | 1161 | u32 mark = xnew->mark.v & xnew->mark.m; |
c7f5ea3a | 1162 | |
98806f75 | 1163 | h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family); |
b67bfe0d | 1164 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
c7f5ea3a DM |
1165 | if (x->props.family == family && |
1166 | x->props.reqid == reqid && | |
3d6acfa7 | 1167 | (mark & x->mark.m) == x->mark.v && |
70e94e66 YH |
1168 | xfrm_addr_equal(&x->id.daddr, &xnew->id.daddr, family) && |
1169 | xfrm_addr_equal(&x->props.saddr, &xnew->props.saddr, family)) | |
34996cb9 | 1170 | x->genid++; |
c7f5ea3a DM |
1171 | } |
1172 | } | |
1173 | ||
1da177e4 LT |
1174 | void xfrm_state_insert(struct xfrm_state *x) |
1175 | { | |
283bc9f3 FD |
1176 | struct net *net = xs_net(x); |
1177 | ||
1178 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
c7f5ea3a | 1179 | __xfrm_state_bump_genids(x); |
1da177e4 | 1180 | __xfrm_state_insert(x); |
283bc9f3 | 1181 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1182 | } |
1183 | EXPORT_SYMBOL(xfrm_state_insert); | |
1184 | ||
283bc9f3 | 1185 | /* net->xfrm.xfrm_state_lock is held */ |
e473fcb4 MK |
1186 | static struct xfrm_state *__find_acq_core(struct net *net, |
1187 | const struct xfrm_mark *m, | |
a70486f0 DM |
1188 | unsigned short family, u8 mode, |
1189 | u32 reqid, u8 proto, | |
1190 | const xfrm_address_t *daddr, | |
e473fcb4 MK |
1191 | const xfrm_address_t *saddr, |
1192 | int create) | |
2770834c | 1193 | { |
5447c5e4 | 1194 | unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family); |
2770834c | 1195 | struct xfrm_state *x; |
3d6acfa7 | 1196 | u32 mark = m->v & m->m; |
2770834c | 1197 | |
b67bfe0d | 1198 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
2770834c DM |
1199 | if (x->props.reqid != reqid || |
1200 | x->props.mode != mode || | |
1201 | x->props.family != family || | |
1202 | x->km.state != XFRM_STATE_ACQ || | |
75e252d9 | 1203 | x->id.spi != 0 || |
1802571b | 1204 | x->id.proto != proto || |
3d6acfa7 | 1205 | (mark & x->mark.m) != x->mark.v || |
70e94e66 YH |
1206 | !xfrm_addr_equal(&x->id.daddr, daddr, family) || |
1207 | !xfrm_addr_equal(&x->props.saddr, saddr, family)) | |
2770834c DM |
1208 | continue; |
1209 | ||
2770834c DM |
1210 | xfrm_state_hold(x); |
1211 | return x; | |
1212 | } | |
1213 | ||
1214 | if (!create) | |
1215 | return NULL; | |
1216 | ||
5447c5e4 | 1217 | x = xfrm_state_alloc(net); |
2770834c DM |
1218 | if (likely(x)) { |
1219 | switch (family) { | |
1220 | case AF_INET: | |
1221 | x->sel.daddr.a4 = daddr->a4; | |
1222 | x->sel.saddr.a4 = saddr->a4; | |
1223 | x->sel.prefixlen_d = 32; | |
1224 | x->sel.prefixlen_s = 32; | |
1225 | x->props.saddr.a4 = saddr->a4; | |
1226 | x->id.daddr.a4 = daddr->a4; | |
1227 | break; | |
1228 | ||
1229 | case AF_INET6: | |
15e318bd JB |
1230 | x->sel.daddr.in6 = daddr->in6; |
1231 | x->sel.saddr.in6 = saddr->in6; | |
2770834c DM |
1232 | x->sel.prefixlen_d = 128; |
1233 | x->sel.prefixlen_s = 128; | |
15e318bd JB |
1234 | x->props.saddr.in6 = saddr->in6; |
1235 | x->id.daddr.in6 = daddr->in6; | |
2770834c | 1236 | break; |
3ff50b79 | 1237 | } |
2770834c DM |
1238 | |
1239 | x->km.state = XFRM_STATE_ACQ; | |
1240 | x->id.proto = proto; | |
1241 | x->props.family = family; | |
1242 | x->props.mode = mode; | |
1243 | x->props.reqid = reqid; | |
bd55775c JHS |
1244 | x->mark.v = m->v; |
1245 | x->mark.m = m->m; | |
b27aeadb | 1246 | x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires; |
2770834c | 1247 | xfrm_state_hold(x); |
9e0d57fd | 1248 | tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL); |
5447c5e4 | 1249 | list_add(&x->km.all, &net->xfrm.state_all); |
ae3fb6d3 | 1250 | hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h); |
5447c5e4 | 1251 | h = xfrm_src_hash(net, daddr, saddr, family); |
ae3fb6d3 | 1252 | hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h); |
918049f0 | 1253 | |
5447c5e4 | 1254 | net->xfrm.state_num++; |
918049f0 | 1255 | |
5447c5e4 | 1256 | xfrm_hash_grow_check(net, x->bydst.next != NULL); |
2770834c DM |
1257 | } |
1258 | ||
1259 | return x; | |
1260 | } | |
1261 | ||
bd55775c | 1262 | static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); |
1da177e4 LT |
1263 | |
1264 | int xfrm_state_add(struct xfrm_state *x) | |
1265 | { | |
5447c5e4 | 1266 | struct net *net = xs_net(x); |
37b08e34 | 1267 | struct xfrm_state *x1, *to_put; |
1da177e4 LT |
1268 | int family; |
1269 | int err; | |
bd55775c | 1270 | u32 mark = x->mark.v & x->mark.m; |
eb2971b6 | 1271 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
1da177e4 LT |
1272 | |
1273 | family = x->props.family; | |
1da177e4 | 1274 | |
37b08e34 DM |
1275 | to_put = NULL; |
1276 | ||
283bc9f3 | 1277 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 1278 | |
edcd5821 | 1279 | x1 = __xfrm_state_locate(x, use_spi, family); |
1da177e4 | 1280 | if (x1) { |
37b08e34 | 1281 | to_put = x1; |
1da177e4 LT |
1282 | x1 = NULL; |
1283 | err = -EEXIST; | |
1284 | goto out; | |
1285 | } | |
1286 | ||
eb2971b6 | 1287 | if (use_spi && x->km.seq) { |
bd55775c | 1288 | x1 = __xfrm_find_acq_byseq(net, mark, x->km.seq); |
75e252d9 | 1289 | if (x1 && ((x1->id.proto != x->id.proto) || |
70e94e66 | 1290 | !xfrm_addr_equal(&x1->id.daddr, &x->id.daddr, family))) { |
37b08e34 | 1291 | to_put = x1; |
1da177e4 LT |
1292 | x1 = NULL; |
1293 | } | |
1294 | } | |
1295 | ||
eb2971b6 | 1296 | if (use_spi && !x1) |
bd55775c JHS |
1297 | x1 = __find_acq_core(net, &x->mark, family, x->props.mode, |
1298 | x->props.reqid, x->id.proto, | |
2770834c | 1299 | &x->id.daddr, &x->props.saddr, 0); |
1da177e4 | 1300 | |
c7f5ea3a | 1301 | __xfrm_state_bump_genids(x); |
1da177e4 LT |
1302 | __xfrm_state_insert(x); |
1303 | err = 0; | |
1304 | ||
1305 | out: | |
283bc9f3 | 1306 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1307 | |
1308 | if (x1) { | |
1309 | xfrm_state_delete(x1); | |
1310 | xfrm_state_put(x1); | |
1311 | } | |
1312 | ||
37b08e34 DM |
1313 | if (to_put) |
1314 | xfrm_state_put(to_put); | |
1315 | ||
1da177e4 LT |
1316 | return err; |
1317 | } | |
1318 | EXPORT_SYMBOL(xfrm_state_add); | |
1319 | ||
80c9abaa | 1320 | #ifdef CONFIG_XFRM_MIGRATE |
4ab47d47 AA |
1321 | static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, |
1322 | struct xfrm_encap_tmpl *encap) | |
80c9abaa | 1323 | { |
98806f75 | 1324 | struct net *net = xs_net(orig); |
98806f75 | 1325 | struct xfrm_state *x = xfrm_state_alloc(net); |
80c9abaa | 1326 | if (!x) |
553f9118 | 1327 | goto out; |
80c9abaa SS |
1328 | |
1329 | memcpy(&x->id, &orig->id, sizeof(x->id)); | |
1330 | memcpy(&x->sel, &orig->sel, sizeof(x->sel)); | |
1331 | memcpy(&x->lft, &orig->lft, sizeof(x->lft)); | |
1332 | x->props.mode = orig->props.mode; | |
1333 | x->props.replay_window = orig->props.replay_window; | |
1334 | x->props.reqid = orig->props.reqid; | |
1335 | x->props.family = orig->props.family; | |
1336 | x->props.saddr = orig->props.saddr; | |
1337 | ||
1338 | if (orig->aalg) { | |
4447bb33 | 1339 | x->aalg = xfrm_algo_auth_clone(orig->aalg); |
80c9abaa SS |
1340 | if (!x->aalg) |
1341 | goto error; | |
1342 | } | |
1343 | x->props.aalgo = orig->props.aalgo; | |
1344 | ||
ee5c2317 SK |
1345 | if (orig->aead) { |
1346 | x->aead = xfrm_algo_aead_clone(orig->aead); | |
75bf50f4 | 1347 | x->geniv = orig->geniv; |
ee5c2317 SK |
1348 | if (!x->aead) |
1349 | goto error; | |
1350 | } | |
80c9abaa SS |
1351 | if (orig->ealg) { |
1352 | x->ealg = xfrm_algo_clone(orig->ealg); | |
1353 | if (!x->ealg) | |
1354 | goto error; | |
1355 | } | |
1356 | x->props.ealgo = orig->props.ealgo; | |
1357 | ||
1358 | if (orig->calg) { | |
1359 | x->calg = xfrm_algo_clone(orig->calg); | |
1360 | if (!x->calg) | |
1361 | goto error; | |
1362 | } | |
1363 | x->props.calgo = orig->props.calgo; | |
1364 | ||
4ab47d47 AA |
1365 | if (encap || orig->encap) { |
1366 | if (encap) | |
1367 | x->encap = kmemdup(encap, sizeof(*x->encap), | |
1368 | GFP_KERNEL); | |
1369 | else | |
1370 | x->encap = kmemdup(orig->encap, sizeof(*x->encap), | |
1371 | GFP_KERNEL); | |
1372 | ||
80c9abaa SS |
1373 | if (!x->encap) |
1374 | goto error; | |
1375 | } | |
1376 | ||
1377 | if (orig->coaddr) { | |
1378 | x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr), | |
1379 | GFP_KERNEL); | |
1380 | if (!x->coaddr) | |
1381 | goto error; | |
1382 | } | |
1383 | ||
af2f464e | 1384 | if (orig->replay_esn) { |
cc9ab60e | 1385 | if (xfrm_replay_clone(x, orig)) |
af2f464e SK |
1386 | goto error; |
1387 | } | |
1388 | ||
bd55775c JHS |
1389 | memcpy(&x->mark, &orig->mark, sizeof(x->mark)); |
1390 | ||
cc9ab60e | 1391 | if (xfrm_init_state(x) < 0) |
80c9abaa SS |
1392 | goto error; |
1393 | ||
1394 | x->props.flags = orig->props.flags; | |
a947b0a9 | 1395 | x->props.extra_flags = orig->props.extra_flags; |
80c9abaa | 1396 | |
ee5c2317 SK |
1397 | x->tfcpad = orig->tfcpad; |
1398 | x->replay_maxdiff = orig->replay_maxdiff; | |
1399 | x->replay_maxage = orig->replay_maxage; | |
80c9abaa SS |
1400 | x->curlft.add_time = orig->curlft.add_time; |
1401 | x->km.state = orig->km.state; | |
1402 | x->km.seq = orig->km.seq; | |
a486cd23 AA |
1403 | x->replay = orig->replay; |
1404 | x->preplay = orig->preplay; | |
80c9abaa SS |
1405 | |
1406 | return x; | |
1407 | ||
1408 | error: | |
553f9118 HX |
1409 | xfrm_state_put(x); |
1410 | out: | |
80c9abaa SS |
1411 | return NULL; |
1412 | } | |
80c9abaa | 1413 | |
283bc9f3 | 1414 | struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net) |
80c9abaa SS |
1415 | { |
1416 | unsigned int h; | |
8c0cba22 SK |
1417 | struct xfrm_state *x = NULL; |
1418 | ||
1419 | spin_lock_bh(&net->xfrm.xfrm_state_lock); | |
80c9abaa SS |
1420 | |
1421 | if (m->reqid) { | |
283bc9f3 | 1422 | h = xfrm_dst_hash(net, &m->old_daddr, &m->old_saddr, |
80c9abaa | 1423 | m->reqid, m->old_family); |
283bc9f3 | 1424 | hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { |
80c9abaa SS |
1425 | if (x->props.mode != m->mode || |
1426 | x->id.proto != m->proto) | |
1427 | continue; | |
1428 | if (m->reqid && x->props.reqid != m->reqid) | |
1429 | continue; | |
70e94e66 YH |
1430 | if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr, |
1431 | m->old_family) || | |
1432 | !xfrm_addr_equal(&x->props.saddr, &m->old_saddr, | |
1433 | m->old_family)) | |
80c9abaa SS |
1434 | continue; |
1435 | xfrm_state_hold(x); | |
8c0cba22 | 1436 | break; |
80c9abaa SS |
1437 | } |
1438 | } else { | |
283bc9f3 | 1439 | h = xfrm_src_hash(net, &m->old_daddr, &m->old_saddr, |
80c9abaa | 1440 | m->old_family); |
283bc9f3 | 1441 | hlist_for_each_entry(x, net->xfrm.state_bysrc+h, bysrc) { |
80c9abaa SS |
1442 | if (x->props.mode != m->mode || |
1443 | x->id.proto != m->proto) | |
1444 | continue; | |
70e94e66 YH |
1445 | if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr, |
1446 | m->old_family) || | |
1447 | !xfrm_addr_equal(&x->props.saddr, &m->old_saddr, | |
1448 | m->old_family)) | |
80c9abaa SS |
1449 | continue; |
1450 | xfrm_state_hold(x); | |
8c0cba22 | 1451 | break; |
80c9abaa SS |
1452 | } |
1453 | } | |
1454 | ||
8c0cba22 SK |
1455 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1456 | ||
1457 | return x; | |
80c9abaa SS |
1458 | } |
1459 | EXPORT_SYMBOL(xfrm_migrate_state_find); | |
1460 | ||
3e94c2dc | 1461 | struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, |
4ab47d47 AA |
1462 | struct xfrm_migrate *m, |
1463 | struct xfrm_encap_tmpl *encap) | |
80c9abaa SS |
1464 | { |
1465 | struct xfrm_state *xc; | |
80c9abaa | 1466 | |
4ab47d47 | 1467 | xc = xfrm_state_clone(x, encap); |
80c9abaa SS |
1468 | if (!xc) |
1469 | return NULL; | |
1470 | ||
1471 | memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr)); | |
1472 | memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr)); | |
1473 | ||
1474 | /* add state */ | |
70e94e66 | 1475 | if (xfrm_addr_equal(&x->id.daddr, &m->new_daddr, m->new_family)) { |
80c9abaa SS |
1476 | /* a care is needed when the destination address of the |
1477 | state is to be updated as it is a part of triplet */ | |
1478 | xfrm_state_insert(xc); | |
1479 | } else { | |
cc9ab60e | 1480 | if (xfrm_state_add(xc) < 0) |
80c9abaa SS |
1481 | goto error; |
1482 | } | |
1483 | ||
1484 | return xc; | |
1485 | error: | |
78347c8c | 1486 | xfrm_state_put(xc); |
80c9abaa SS |
1487 | return NULL; |
1488 | } | |
1489 | EXPORT_SYMBOL(xfrm_state_migrate); | |
1490 | #endif | |
1491 | ||
1da177e4 LT |
1492 | int xfrm_state_update(struct xfrm_state *x) |
1493 | { | |
37b08e34 | 1494 | struct xfrm_state *x1, *to_put; |
1da177e4 | 1495 | int err; |
eb2971b6 | 1496 | int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
283bc9f3 | 1497 | struct net *net = xs_net(x); |
1da177e4 | 1498 | |
37b08e34 DM |
1499 | to_put = NULL; |
1500 | ||
283bc9f3 | 1501 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
edcd5821 | 1502 | x1 = __xfrm_state_locate(x, use_spi, x->props.family); |
1da177e4 LT |
1503 | |
1504 | err = -ESRCH; | |
1505 | if (!x1) | |
1506 | goto out; | |
1507 | ||
1508 | if (xfrm_state_kern(x1)) { | |
37b08e34 | 1509 | to_put = x1; |
1da177e4 LT |
1510 | err = -EEXIST; |
1511 | goto out; | |
1512 | } | |
1513 | ||
1514 | if (x1->km.state == XFRM_STATE_ACQ) { | |
1515 | __xfrm_state_insert(x); | |
1516 | x = NULL; | |
1517 | } | |
1518 | err = 0; | |
1519 | ||
1520 | out: | |
283bc9f3 | 1521 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 | 1522 | |
37b08e34 DM |
1523 | if (to_put) |
1524 | xfrm_state_put(to_put); | |
1525 | ||
1da177e4 LT |
1526 | if (err) |
1527 | return err; | |
1528 | ||
1529 | if (!x) { | |
1530 | xfrm_state_delete(x1); | |
1531 | xfrm_state_put(x1); | |
1532 | return 0; | |
1533 | } | |
1534 | ||
1535 | err = -EINVAL; | |
1536 | spin_lock_bh(&x1->lock); | |
1537 | if (likely(x1->km.state == XFRM_STATE_VALID)) { | |
257a4b01 HX |
1538 | if (x->encap && x1->encap && |
1539 | x->encap->encap_type == x1->encap->encap_type) | |
1da177e4 | 1540 | memcpy(x1->encap, x->encap, sizeof(*x1->encap)); |
257a4b01 HX |
1541 | else if (x->encap || x1->encap) |
1542 | goto fail; | |
1543 | ||
060f02a3 NT |
1544 | if (x->coaddr && x1->coaddr) { |
1545 | memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr)); | |
1546 | } | |
1547 | if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel))) | |
1548 | memcpy(&x1->sel, &x->sel, sizeof(x1->sel)); | |
1da177e4 LT |
1549 | memcpy(&x1->lft, &x->lft, sizeof(x1->lft)); |
1550 | x1->km.dying = 0; | |
1551 | ||
9e0d57fd | 1552 | tasklet_hrtimer_start(&x1->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL); |
1da177e4 LT |
1553 | if (x1->curlft.use_time) |
1554 | xfrm_state_check_expire(x1); | |
1555 | ||
1556 | err = 0; | |
8fcbc637 TG |
1557 | x->km.state = XFRM_STATE_DEAD; |
1558 | __xfrm_state_put(x); | |
1da177e4 | 1559 | } |
257a4b01 HX |
1560 | |
1561 | fail: | |
1da177e4 LT |
1562 | spin_unlock_bh(&x1->lock); |
1563 | ||
1564 | xfrm_state_put(x1); | |
1565 | ||
1566 | return err; | |
1567 | } | |
1568 | EXPORT_SYMBOL(xfrm_state_update); | |
1569 | ||
1570 | int xfrm_state_check_expire(struct xfrm_state *x) | |
1571 | { | |
1572 | if (!x->curlft.use_time) | |
9d729f72 | 1573 | x->curlft.use_time = get_seconds(); |
1da177e4 | 1574 | |
1da177e4 LT |
1575 | if (x->curlft.bytes >= x->lft.hard_byte_limit || |
1576 | x->curlft.packets >= x->lft.hard_packet_limit) { | |
4666faab | 1577 | x->km.state = XFRM_STATE_EXPIRED; |
8b0e1953 | 1578 | tasklet_hrtimer_start(&x->mtimer, 0, HRTIMER_MODE_REL); |
1da177e4 LT |
1579 | return -EINVAL; |
1580 | } | |
1581 | ||
1582 | if (!x->km.dying && | |
1583 | (x->curlft.bytes >= x->lft.soft_byte_limit || | |
4666faab HX |
1584 | x->curlft.packets >= x->lft.soft_packet_limit)) { |
1585 | x->km.dying = 1; | |
53bc6b4d | 1586 | km_state_expired(x, 0, 0); |
4666faab | 1587 | } |
1da177e4 LT |
1588 | return 0; |
1589 | } | |
1590 | EXPORT_SYMBOL(xfrm_state_check_expire); | |
1591 | ||
1da177e4 | 1592 | struct xfrm_state * |
a70486f0 | 1593 | xfrm_state_lookup(struct net *net, u32 mark, const xfrm_address_t *daddr, __be32 spi, |
bd55775c | 1594 | u8 proto, unsigned short family) |
1da177e4 LT |
1595 | { |
1596 | struct xfrm_state *x; | |
1da177e4 | 1597 | |
c2f672fc | 1598 | rcu_read_lock(); |
bd55775c | 1599 | x = __xfrm_state_lookup(net, mark, daddr, spi, proto, family); |
c2f672fc | 1600 | rcu_read_unlock(); |
1da177e4 LT |
1601 | return x; |
1602 | } | |
1603 | EXPORT_SYMBOL(xfrm_state_lookup); | |
1604 | ||
1605 | struct xfrm_state * | |
bd55775c | 1606 | xfrm_state_lookup_byaddr(struct net *net, u32 mark, |
a70486f0 | 1607 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, |
eb2971b6 MN |
1608 | u8 proto, unsigned short family) |
1609 | { | |
1610 | struct xfrm_state *x; | |
eb2971b6 | 1611 | |
283bc9f3 | 1612 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1613 | x = __xfrm_state_lookup_byaddr(net, mark, daddr, saddr, proto, family); |
283bc9f3 | 1614 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
eb2971b6 MN |
1615 | return x; |
1616 | } | |
1617 | EXPORT_SYMBOL(xfrm_state_lookup_byaddr); | |
1618 | ||
1619 | struct xfrm_state * | |
e473fcb4 MK |
1620 | xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, u8 mode, u32 reqid, |
1621 | u8 proto, const xfrm_address_t *daddr, | |
1622 | const xfrm_address_t *saddr, int create, unsigned short family) | |
1da177e4 LT |
1623 | { |
1624 | struct xfrm_state *x; | |
1da177e4 | 1625 | |
283bc9f3 | 1626 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1627 | x = __find_acq_core(net, mark, family, mode, reqid, proto, daddr, saddr, create); |
283bc9f3 | 1628 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
2770834c | 1629 | |
1da177e4 LT |
1630 | return x; |
1631 | } | |
1632 | EXPORT_SYMBOL(xfrm_find_acq); | |
1633 | ||
41a49cc3 MN |
1634 | #ifdef CONFIG_XFRM_SUB_POLICY |
1635 | int | |
1636 | xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, | |
283bc9f3 | 1637 | unsigned short family, struct net *net) |
41a49cc3 | 1638 | { |
3f5a95ad | 1639 | int i; |
41a49cc3 MN |
1640 | int err = 0; |
1641 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
1642 | if (!afinfo) | |
1643 | return -EAFNOSUPPORT; | |
1644 | ||
283bc9f3 | 1645 | spin_lock_bh(&net->xfrm.xfrm_state_lock); /*FIXME*/ |
41a49cc3 MN |
1646 | if (afinfo->tmpl_sort) |
1647 | err = afinfo->tmpl_sort(dst, src, n); | |
3f5a95ad KD |
1648 | else |
1649 | for (i = 0; i < n; i++) | |
1650 | dst[i] = src[i]; | |
283bc9f3 | 1651 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
af5d27c4 | 1652 | rcu_read_unlock(); |
41a49cc3 MN |
1653 | return err; |
1654 | } | |
1655 | EXPORT_SYMBOL(xfrm_tmpl_sort); | |
1656 | ||
1657 | int | |
1658 | xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, | |
1659 | unsigned short family) | |
1660 | { | |
3f5a95ad | 1661 | int i; |
41a49cc3 MN |
1662 | int err = 0; |
1663 | struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); | |
35ea790d | 1664 | struct net *net = xs_net(*src); |
283bc9f3 | 1665 | |
41a49cc3 MN |
1666 | if (!afinfo) |
1667 | return -EAFNOSUPPORT; | |
1668 | ||
283bc9f3 | 1669 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
41a49cc3 MN |
1670 | if (afinfo->state_sort) |
1671 | err = afinfo->state_sort(dst, src, n); | |
3f5a95ad KD |
1672 | else |
1673 | for (i = 0; i < n; i++) | |
1674 | dst[i] = src[i]; | |
283bc9f3 | 1675 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
af5d27c4 | 1676 | rcu_read_unlock(); |
41a49cc3 MN |
1677 | return err; |
1678 | } | |
1679 | EXPORT_SYMBOL(xfrm_state_sort); | |
1680 | #endif | |
1681 | ||
1da177e4 LT |
1682 | /* Silly enough, but I'm lazy to build resolution list */ |
1683 | ||
bd55775c | 1684 | static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq) |
1da177e4 LT |
1685 | { |
1686 | int i; | |
1da177e4 | 1687 | |
5447c5e4 | 1688 | for (i = 0; i <= net->xfrm.state_hmask; i++) { |
8f126e37 DM |
1689 | struct xfrm_state *x; |
1690 | ||
b67bfe0d | 1691 | hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { |
8f126e37 | 1692 | if (x->km.seq == seq && |
3d6acfa7 | 1693 | (mark & x->mark.m) == x->mark.v && |
8f126e37 | 1694 | x->km.state == XFRM_STATE_ACQ) { |
1da177e4 LT |
1695 | xfrm_state_hold(x); |
1696 | return x; | |
1697 | } | |
1698 | } | |
1699 | } | |
1700 | return NULL; | |
1701 | } | |
1702 | ||
bd55775c | 1703 | struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq) |
1da177e4 LT |
1704 | { |
1705 | struct xfrm_state *x; | |
1706 | ||
283bc9f3 | 1707 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
bd55775c | 1708 | x = __xfrm_find_acq_byseq(net, mark, seq); |
283bc9f3 | 1709 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1710 | return x; |
1711 | } | |
1712 | EXPORT_SYMBOL(xfrm_find_acq_byseq); | |
1713 | ||
1714 | u32 xfrm_get_acqseq(void) | |
1715 | { | |
1716 | u32 res; | |
6836b9bd | 1717 | static atomic_t acqseq; |
1718 | ||
1719 | do { | |
1720 | res = atomic_inc_return(&acqseq); | |
1721 | } while (!res); | |
1da177e4 | 1722 | |
1da177e4 LT |
1723 | return res; |
1724 | } | |
1725 | EXPORT_SYMBOL(xfrm_get_acqseq); | |
1726 | ||
776e9dd9 FD |
1727 | int verify_spi_info(u8 proto, u32 min, u32 max) |
1728 | { | |
1729 | switch (proto) { | |
1730 | case IPPROTO_AH: | |
1731 | case IPPROTO_ESP: | |
1732 | break; | |
1733 | ||
1734 | case IPPROTO_COMP: | |
1735 | /* IPCOMP spi is 16-bits. */ | |
1736 | if (max >= 0x10000) | |
1737 | return -EINVAL; | |
1738 | break; | |
1739 | ||
1740 | default: | |
1741 | return -EINVAL; | |
1742 | } | |
1743 | ||
1744 | if (min > max) | |
1745 | return -EINVAL; | |
1746 | ||
1747 | return 0; | |
1748 | } | |
1749 | EXPORT_SYMBOL(verify_spi_info); | |
1750 | ||
658b219e | 1751 | int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high) |
1da177e4 | 1752 | { |
221df1ed | 1753 | struct net *net = xs_net(x); |
f034b5d4 | 1754 | unsigned int h; |
1da177e4 | 1755 | struct xfrm_state *x0; |
658b219e HX |
1756 | int err = -ENOENT; |
1757 | __be32 minspi = htonl(low); | |
1758 | __be32 maxspi = htonl(high); | |
bd55775c | 1759 | u32 mark = x->mark.v & x->mark.m; |
1da177e4 | 1760 | |
658b219e HX |
1761 | spin_lock_bh(&x->lock); |
1762 | if (x->km.state == XFRM_STATE_DEAD) | |
1763 | goto unlock; | |
1764 | ||
1765 | err = 0; | |
1da177e4 | 1766 | if (x->id.spi) |
658b219e HX |
1767 | goto unlock; |
1768 | ||
1769 | err = -ENOENT; | |
1da177e4 LT |
1770 | |
1771 | if (minspi == maxspi) { | |
bd55775c | 1772 | x0 = xfrm_state_lookup(net, mark, &x->id.daddr, minspi, x->id.proto, x->props.family); |
1da177e4 LT |
1773 | if (x0) { |
1774 | xfrm_state_put(x0); | |
658b219e | 1775 | goto unlock; |
1da177e4 LT |
1776 | } |
1777 | x->id.spi = minspi; | |
1778 | } else { | |
1779 | u32 spi = 0; | |
9b7a787d | 1780 | for (h = 0; h < high-low+1; h++) { |
63862b5b | 1781 | spi = low + prandom_u32()%(high-low+1); |
bd55775c | 1782 | x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family); |
1da177e4 LT |
1783 | if (x0 == NULL) { |
1784 | x->id.spi = htonl(spi); | |
1785 | break; | |
1786 | } | |
1787 | xfrm_state_put(x0); | |
1788 | } | |
1789 | } | |
1790 | if (x->id.spi) { | |
283bc9f3 | 1791 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12604d8a | 1792 | h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family); |
ae3fb6d3 | 1793 | hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h); |
283bc9f3 | 1794 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
658b219e HX |
1795 | |
1796 | err = 0; | |
1da177e4 | 1797 | } |
658b219e HX |
1798 | |
1799 | unlock: | |
1800 | spin_unlock_bh(&x->lock); | |
1801 | ||
1802 | return err; | |
1da177e4 LT |
1803 | } |
1804 | EXPORT_SYMBOL(xfrm_alloc_spi); | |
1805 | ||
d3623099 | 1806 | static bool __xfrm_state_filter_match(struct xfrm_state *x, |
870a2df4 | 1807 | struct xfrm_address_filter *filter) |
d3623099 ND |
1808 | { |
1809 | if (filter) { | |
1810 | if ((filter->family == AF_INET || | |
1811 | filter->family == AF_INET6) && | |
1812 | x->props.family != filter->family) | |
1813 | return false; | |
1814 | ||
1815 | return addr_match(&x->props.saddr, &filter->saddr, | |
1816 | filter->splen) && | |
1817 | addr_match(&x->id.daddr, &filter->daddr, | |
1818 | filter->dplen); | |
1819 | } | |
1820 | return true; | |
1821 | } | |
1822 | ||
284fa7da | 1823 | int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, |
4c563f76 | 1824 | int (*func)(struct xfrm_state *, int, void*), |
1da177e4 LT |
1825 | void *data) |
1826 | { | |
12a169e7 HX |
1827 | struct xfrm_state *state; |
1828 | struct xfrm_state_walk *x; | |
1da177e4 LT |
1829 | int err = 0; |
1830 | ||
12a169e7 | 1831 | if (walk->seq != 0 && list_empty(&walk->all)) |
4c563f76 TT |
1832 | return 0; |
1833 | ||
283bc9f3 | 1834 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12a169e7 | 1835 | if (list_empty(&walk->all)) |
284fa7da | 1836 | x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all); |
12a169e7 | 1837 | else |
80077702 | 1838 | x = list_first_entry(&walk->all, struct xfrm_state_walk, all); |
284fa7da | 1839 | list_for_each_entry_from(x, &net->xfrm.state_all, all) { |
12a169e7 | 1840 | if (x->state == XFRM_STATE_DEAD) |
4c563f76 | 1841 | continue; |
12a169e7 HX |
1842 | state = container_of(x, struct xfrm_state, km); |
1843 | if (!xfrm_id_proto_match(state->id.proto, walk->proto)) | |
4c563f76 | 1844 | continue; |
d3623099 ND |
1845 | if (!__xfrm_state_filter_match(state, walk->filter)) |
1846 | continue; | |
12a169e7 HX |
1847 | err = func(state, walk->seq, data); |
1848 | if (err) { | |
1849 | list_move_tail(&walk->all, &x->all); | |
1850 | goto out; | |
1da177e4 | 1851 | } |
12a169e7 | 1852 | walk->seq++; |
1da177e4 | 1853 | } |
12a169e7 | 1854 | if (walk->seq == 0) { |
1da177e4 LT |
1855 | err = -ENOENT; |
1856 | goto out; | |
1857 | } | |
12a169e7 | 1858 | list_del_init(&walk->all); |
1da177e4 | 1859 | out: |
283bc9f3 | 1860 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
1da177e4 LT |
1861 | return err; |
1862 | } | |
1863 | EXPORT_SYMBOL(xfrm_state_walk); | |
1864 | ||
d3623099 | 1865 | void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto, |
870a2df4 | 1866 | struct xfrm_address_filter *filter) |
5c182458 | 1867 | { |
12a169e7 | 1868 | INIT_LIST_HEAD(&walk->all); |
5c182458 | 1869 | walk->proto = proto; |
12a169e7 HX |
1870 | walk->state = XFRM_STATE_DEAD; |
1871 | walk->seq = 0; | |
d3623099 | 1872 | walk->filter = filter; |
5c182458 HX |
1873 | } |
1874 | EXPORT_SYMBOL(xfrm_state_walk_init); | |
1875 | ||
283bc9f3 | 1876 | void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net) |
abb81c4f | 1877 | { |
d3623099 ND |
1878 | kfree(walk->filter); |
1879 | ||
12a169e7 | 1880 | if (list_empty(&walk->all)) |
5c182458 | 1881 | return; |
5c182458 | 1882 | |
283bc9f3 | 1883 | spin_lock_bh(&net->xfrm.xfrm_state_lock); |
12a169e7 | 1884 | list_del(&walk->all); |
283bc9f3 | 1885 | spin_unlock_bh(&net->xfrm.xfrm_state_lock); |
abb81c4f HX |
1886 | } |
1887 | EXPORT_SYMBOL(xfrm_state_walk_done); | |
1888 | ||
e99e88a9 | 1889 | static void xfrm_replay_timer_handler(struct timer_list *t) |
f8cd5488 | 1890 | { |
e99e88a9 | 1891 | struct xfrm_state *x = from_timer(x, t, rtimer); |
f8cd5488 JHS |
1892 | |
1893 | spin_lock(&x->lock); | |
1894 | ||
2717096a | 1895 | if (x->km.state == XFRM_STATE_VALID) { |
a6483b79 | 1896 | if (xfrm_aevent_is_on(xs_net(x))) |
9fdc4883 | 1897 | x->repl->notify(x, XFRM_REPLAY_TIMEOUT); |
2717096a JHS |
1898 | else |
1899 | x->xflags |= XFRM_TIME_DEFER; | |
1900 | } | |
f8cd5488 JHS |
1901 | |
1902 | spin_unlock(&x->lock); | |
1903 | } | |
1904 | ||
df01812e | 1905 | static LIST_HEAD(xfrm_km_list); |
1da177e4 | 1906 | |
214e005b | 1907 | void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
1da177e4 LT |
1908 | { |
1909 | struct xfrm_mgr *km; | |
1910 | ||
85168c00 CW |
1911 | rcu_read_lock(); |
1912 | list_for_each_entry_rcu(km, &xfrm_km_list, list) | |
26b15dad JHS |
1913 | if (km->notify_policy) |
1914 | km->notify_policy(xp, dir, c); | |
85168c00 | 1915 | rcu_read_unlock(); |
26b15dad | 1916 | } |
1da177e4 | 1917 | |
214e005b | 1918 | void km_state_notify(struct xfrm_state *x, const struct km_event *c) |
26b15dad JHS |
1919 | { |
1920 | struct xfrm_mgr *km; | |
85168c00 CW |
1921 | rcu_read_lock(); |
1922 | list_for_each_entry_rcu(km, &xfrm_km_list, list) | |
26b15dad JHS |
1923 | if (km->notify) |
1924 | km->notify(x, c); | |
85168c00 | 1925 | rcu_read_unlock(); |
26b15dad JHS |
1926 | } |
1927 | ||
1928 | EXPORT_SYMBOL(km_policy_notify); | |
1929 | EXPORT_SYMBOL(km_state_notify); | |
1930 | ||
15e47304 | 1931 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid) |
26b15dad JHS |
1932 | { |
1933 | struct km_event c; | |
1934 | ||
bf08867f | 1935 | c.data.hard = hard; |
15e47304 | 1936 | c.portid = portid; |
f60f6b8f | 1937 | c.event = XFRM_MSG_EXPIRE; |
26b15dad | 1938 | km_state_notify(x, &c); |
1da177e4 LT |
1939 | } |
1940 | ||
53bc6b4d | 1941 | EXPORT_SYMBOL(km_state_expired); |
26b15dad JHS |
1942 | /* |
1943 | * We send to all registered managers regardless of failure | |
1944 | * We are happy with one success | |
1945 | */ | |
980ebd25 | 1946 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol) |
1da177e4 | 1947 | { |
26b15dad | 1948 | int err = -EINVAL, acqret; |
1da177e4 LT |
1949 | struct xfrm_mgr *km; |
1950 | ||
85168c00 CW |
1951 | rcu_read_lock(); |
1952 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
65e0736b | 1953 | acqret = km->acquire(x, t, pol); |
26b15dad JHS |
1954 | if (!acqret) |
1955 | err = acqret; | |
1da177e4 | 1956 | } |
85168c00 | 1957 | rcu_read_unlock(); |
1da177e4 LT |
1958 | return err; |
1959 | } | |
980ebd25 | 1960 | EXPORT_SYMBOL(km_query); |
1da177e4 | 1961 | |
5d36b180 | 1962 | int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) |
1da177e4 LT |
1963 | { |
1964 | int err = -EINVAL; | |
1965 | struct xfrm_mgr *km; | |
1966 | ||
85168c00 CW |
1967 | rcu_read_lock(); |
1968 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
1da177e4 LT |
1969 | if (km->new_mapping) |
1970 | err = km->new_mapping(x, ipaddr, sport); | |
1971 | if (!err) | |
1972 | break; | |
1973 | } | |
85168c00 | 1974 | rcu_read_unlock(); |
1da177e4 LT |
1975 | return err; |
1976 | } | |
1977 | EXPORT_SYMBOL(km_new_mapping); | |
1978 | ||
15e47304 | 1979 | void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid) |
1da177e4 | 1980 | { |
26b15dad | 1981 | struct km_event c; |
1da177e4 | 1982 | |
bf08867f | 1983 | c.data.hard = hard; |
15e47304 | 1984 | c.portid = portid; |
f60f6b8f | 1985 | c.event = XFRM_MSG_POLEXPIRE; |
26b15dad | 1986 | km_policy_notify(pol, dir, &c); |
1da177e4 | 1987 | } |
a70fcb0b | 1988 | EXPORT_SYMBOL(km_policy_expired); |
1da177e4 | 1989 | |
2d60abc2 | 1990 | #ifdef CONFIG_XFRM_MIGRATE |
183cad12 DM |
1991 | int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1992 | const struct xfrm_migrate *m, int num_migrate, | |
8bafd730 AA |
1993 | const struct xfrm_kmaddress *k, |
1994 | const struct xfrm_encap_tmpl *encap) | |
80c9abaa SS |
1995 | { |
1996 | int err = -EINVAL; | |
1997 | int ret; | |
1998 | struct xfrm_mgr *km; | |
1999 | ||
85168c00 CW |
2000 | rcu_read_lock(); |
2001 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
80c9abaa | 2002 | if (km->migrate) { |
8bafd730 AA |
2003 | ret = km->migrate(sel, dir, type, m, num_migrate, k, |
2004 | encap); | |
80c9abaa SS |
2005 | if (!ret) |
2006 | err = ret; | |
2007 | } | |
2008 | } | |
85168c00 | 2009 | rcu_read_unlock(); |
80c9abaa SS |
2010 | return err; |
2011 | } | |
2012 | EXPORT_SYMBOL(km_migrate); | |
2d60abc2 | 2013 | #endif |
80c9abaa | 2014 | |
db983c11 | 2015 | int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr) |
97a64b45 MN |
2016 | { |
2017 | int err = -EINVAL; | |
2018 | int ret; | |
2019 | struct xfrm_mgr *km; | |
2020 | ||
85168c00 CW |
2021 | rcu_read_lock(); |
2022 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
97a64b45 | 2023 | if (km->report) { |
db983c11 | 2024 | ret = km->report(net, proto, sel, addr); |
97a64b45 MN |
2025 | if (!ret) |
2026 | err = ret; | |
2027 | } | |
2028 | } | |
85168c00 | 2029 | rcu_read_unlock(); |
97a64b45 MN |
2030 | return err; |
2031 | } | |
2032 | EXPORT_SYMBOL(km_report); | |
2033 | ||
0f24558e HG |
2034 | bool km_is_alive(const struct km_event *c) |
2035 | { | |
2036 | struct xfrm_mgr *km; | |
2037 | bool is_alive = false; | |
2038 | ||
2039 | rcu_read_lock(); | |
2040 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
2041 | if (km->is_alive && km->is_alive(c)) { | |
2042 | is_alive = true; | |
2043 | break; | |
2044 | } | |
2045 | } | |
2046 | rcu_read_unlock(); | |
2047 | ||
2048 | return is_alive; | |
2049 | } | |
2050 | EXPORT_SYMBOL(km_is_alive); | |
2051 | ||
1da177e4 LT |
2052 | int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) |
2053 | { | |
2054 | int err; | |
2055 | u8 *data; | |
2056 | struct xfrm_mgr *km; | |
2057 | struct xfrm_policy *pol = NULL; | |
2058 | ||
2059 | if (optlen <= 0 || optlen > PAGE_SIZE) | |
2060 | return -EMSGSIZE; | |
2061 | ||
a133d930 GT |
2062 | data = memdup_user(optval, optlen); |
2063 | if (IS_ERR(data)) | |
2064 | return PTR_ERR(data); | |
1da177e4 LT |
2065 | |
2066 | err = -EINVAL; | |
85168c00 CW |
2067 | rcu_read_lock(); |
2068 | list_for_each_entry_rcu(km, &xfrm_km_list, list) { | |
cb969f07 | 2069 | pol = km->compile_policy(sk, optname, data, |
1da177e4 LT |
2070 | optlen, &err); |
2071 | if (err >= 0) | |
2072 | break; | |
2073 | } | |
85168c00 | 2074 | rcu_read_unlock(); |
1da177e4 LT |
2075 | |
2076 | if (err >= 0) { | |
2077 | xfrm_sk_policy_insert(sk, err, pol); | |
2078 | xfrm_pol_put(pol); | |
2b06cdf3 | 2079 | __sk_dst_reset(sk); |
1da177e4 LT |
2080 | err = 0; |
2081 | } | |
2082 | ||
1da177e4 LT |
2083 | kfree(data); |
2084 | return err; | |
2085 | } | |
2086 | EXPORT_SYMBOL(xfrm_user_policy); | |
2087 | ||
85168c00 CW |
2088 | static DEFINE_SPINLOCK(xfrm_km_lock); |
2089 | ||
1da177e4 LT |
2090 | int xfrm_register_km(struct xfrm_mgr *km) |
2091 | { | |
85168c00 CW |
2092 | spin_lock_bh(&xfrm_km_lock); |
2093 | list_add_tail_rcu(&km->list, &xfrm_km_list); | |
2094 | spin_unlock_bh(&xfrm_km_lock); | |
1da177e4 LT |
2095 | return 0; |
2096 | } | |
2097 | EXPORT_SYMBOL(xfrm_register_km); | |
2098 | ||
2099 | int xfrm_unregister_km(struct xfrm_mgr *km) | |
2100 | { | |
85168c00 CW |
2101 | spin_lock_bh(&xfrm_km_lock); |
2102 | list_del_rcu(&km->list); | |
2103 | spin_unlock_bh(&xfrm_km_lock); | |
2104 | synchronize_rcu(); | |
1da177e4 LT |
2105 | return 0; |
2106 | } | |
2107 | EXPORT_SYMBOL(xfrm_unregister_km); | |
2108 | ||
2109 | int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo) | |
2110 | { | |
2111 | int err = 0; | |
423826a7 FW |
2112 | |
2113 | if (WARN_ON(afinfo->family >= NPROTO)) | |
1da177e4 | 2114 | return -EAFNOSUPPORT; |
423826a7 | 2115 | |
44abdc30 | 2116 | spin_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 | 2117 | if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL)) |
f31e8d4f | 2118 | err = -EEXIST; |
edcd5821 | 2119 | else |
44abdc30 CW |
2120 | rcu_assign_pointer(xfrm_state_afinfo[afinfo->family], afinfo); |
2121 | spin_unlock_bh(&xfrm_state_afinfo_lock); | |
1da177e4 LT |
2122 | return err; |
2123 | } | |
2124 | EXPORT_SYMBOL(xfrm_state_register_afinfo); | |
2125 | ||
2126 | int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo) | |
2127 | { | |
423826a7 FW |
2128 | int err = 0, family = afinfo->family; |
2129 | ||
2130 | if (WARN_ON(family >= NPROTO)) | |
1da177e4 | 2131 | return -EAFNOSUPPORT; |
423826a7 | 2132 | |
44abdc30 | 2133 | spin_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4 | 2134 | if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) { |
423826a7 | 2135 | if (rcu_access_pointer(xfrm_state_afinfo[family]) != afinfo) |
1da177e4 | 2136 | err = -EINVAL; |
edcd5821 | 2137 | else |
44abdc30 | 2138 | RCU_INIT_POINTER(xfrm_state_afinfo[afinfo->family], NULL); |
1da177e4 | 2139 | } |
44abdc30 CW |
2140 | spin_unlock_bh(&xfrm_state_afinfo_lock); |
2141 | synchronize_rcu(); | |
1da177e4 LT |
2142 | return err; |
2143 | } | |
2144 | EXPORT_SYMBOL(xfrm_state_unregister_afinfo); | |
2145 | ||
711059b9 FW |
2146 | struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family) |
2147 | { | |
2148 | if (unlikely(family >= NPROTO)) | |
2149 | return NULL; | |
2150 | ||
2151 | return rcu_dereference(xfrm_state_afinfo[family]); | |
2152 | } | |
2153 | ||
628e341f | 2154 | struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family) |
1da177e4 LT |
2155 | { |
2156 | struct xfrm_state_afinfo *afinfo; | |
2157 | if (unlikely(family >= NPROTO)) | |
2158 | return NULL; | |
44abdc30 CW |
2159 | rcu_read_lock(); |
2160 | afinfo = rcu_dereference(xfrm_state_afinfo[family]); | |
546be240 | 2161 | if (unlikely(!afinfo)) |
44abdc30 | 2162 | rcu_read_unlock(); |
1da177e4 LT |
2163 | return afinfo; |
2164 | } | |
2165 | ||
1da177e4 LT |
2166 | /* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */ |
2167 | void xfrm_state_delete_tunnel(struct xfrm_state *x) | |
2168 | { | |
2169 | if (x->tunnel) { | |
2170 | struct xfrm_state *t = x->tunnel; | |
2171 | ||
2172 | if (atomic_read(&t->tunnel_users) == 2) | |
2173 | xfrm_state_delete(t); | |
2174 | atomic_dec(&t->tunnel_users); | |
2175 | xfrm_state_put(t); | |
2176 | x->tunnel = NULL; | |
2177 | } | |
2178 | } | |
2179 | EXPORT_SYMBOL(xfrm_state_delete_tunnel); | |
2180 | ||
2181 | int xfrm_state_mtu(struct xfrm_state *x, int mtu) | |
2182 | { | |
b3b73b8e | 2183 | const struct xfrm_type *type = READ_ONCE(x->type); |
1da177e4 | 2184 | |
c5c25238 | 2185 | if (x->km.state == XFRM_STATE_VALID && |
b3b73b8e FW |
2186 | type && type->get_mtu) |
2187 | return type->get_mtu(x, mtu); | |
2188 | ||
2189 | return mtu - x->props.header_len; | |
1da177e4 LT |
2190 | } |
2191 | ||
ffdb5211 | 2192 | int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload) |
72cb6962 | 2193 | { |
d094cd83 | 2194 | struct xfrm_state_afinfo *afinfo; |
df9dcb45 | 2195 | struct xfrm_mode *inner_mode; |
d094cd83 | 2196 | int family = x->props.family; |
72cb6962 HX |
2197 | int err; |
2198 | ||
d094cd83 HX |
2199 | err = -EAFNOSUPPORT; |
2200 | afinfo = xfrm_state_get_afinfo(family); | |
2201 | if (!afinfo) | |
2202 | goto error; | |
2203 | ||
2204 | err = 0; | |
2205 | if (afinfo->init_flags) | |
2206 | err = afinfo->init_flags(x); | |
2207 | ||
af5d27c4 | 2208 | rcu_read_unlock(); |
d094cd83 HX |
2209 | |
2210 | if (err) | |
2211 | goto error; | |
2212 | ||
2213 | err = -EPROTONOSUPPORT; | |
13996378 | 2214 | |
df9dcb45 KM |
2215 | if (x->sel.family != AF_UNSPEC) { |
2216 | inner_mode = xfrm_get_mode(x->props.mode, x->sel.family); | |
2217 | if (inner_mode == NULL) | |
2218 | goto error; | |
2219 | ||
2220 | if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) && | |
2221 | family != x->sel.family) { | |
2222 | xfrm_put_mode(inner_mode); | |
2223 | goto error; | |
2224 | } | |
2225 | ||
2226 | x->inner_mode = inner_mode; | |
2227 | } else { | |
2228 | struct xfrm_mode *inner_mode_iaf; | |
d81d2285 | 2229 | int iafamily = AF_INET; |
df9dcb45 | 2230 | |
d81d2285 | 2231 | inner_mode = xfrm_get_mode(x->props.mode, x->props.family); |
df9dcb45 KM |
2232 | if (inner_mode == NULL) |
2233 | goto error; | |
2234 | ||
2235 | if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) { | |
2236 | xfrm_put_mode(inner_mode); | |
2237 | goto error; | |
2238 | } | |
d81d2285 | 2239 | x->inner_mode = inner_mode; |
df9dcb45 | 2240 | |
d81d2285 MW |
2241 | if (x->props.family == AF_INET) |
2242 | iafamily = AF_INET6; | |
df9dcb45 | 2243 | |
d81d2285 MW |
2244 | inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily); |
2245 | if (inner_mode_iaf) { | |
2246 | if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL) | |
2247 | x->inner_mode_iaf = inner_mode_iaf; | |
2248 | else | |
2249 | xfrm_put_mode(inner_mode_iaf); | |
df9dcb45 KM |
2250 | } |
2251 | } | |
13996378 | 2252 | |
d094cd83 | 2253 | x->type = xfrm_get_type(x->id.proto, family); |
72cb6962 HX |
2254 | if (x->type == NULL) |
2255 | goto error; | |
2256 | ||
ffdb5211 | 2257 | x->type_offload = xfrm_get_type_offload(x->id.proto, family, offload); |
9d389d7f | 2258 | |
72cb6962 HX |
2259 | err = x->type->init_state(x); |
2260 | if (err) | |
2261 | goto error; | |
2262 | ||
13996378 | 2263 | x->outer_mode = xfrm_get_mode(x->props.mode, family); |
599901c3 JL |
2264 | if (x->outer_mode == NULL) { |
2265 | err = -EPROTONOSUPPORT; | |
b59f45d0 | 2266 | goto error; |
599901c3 | 2267 | } |
b59f45d0 | 2268 | |
a454f0cc WY |
2269 | if (init_replay) { |
2270 | err = xfrm_init_replay(x); | |
2271 | if (err) | |
2272 | goto error; | |
2273 | } | |
2274 | ||
72cb6962 HX |
2275 | error: |
2276 | return err; | |
2277 | } | |
2278 | ||
a454f0cc WY |
2279 | EXPORT_SYMBOL(__xfrm_init_state); |
2280 | ||
2281 | int xfrm_init_state(struct xfrm_state *x) | |
2282 | { | |
cc01572e YK |
2283 | int err; |
2284 | ||
2285 | err = __xfrm_init_state(x, true, false); | |
2286 | if (!err) | |
2287 | x->km.state = XFRM_STATE_VALID; | |
2288 | ||
2289 | return err; | |
a454f0cc WY |
2290 | } |
2291 | ||
72cb6962 | 2292 | EXPORT_SYMBOL(xfrm_init_state); |
a716c119 | 2293 | |
d62ddc21 | 2294 | int __net_init xfrm_state_init(struct net *net) |
1da177e4 | 2295 | { |
f034b5d4 DM |
2296 | unsigned int sz; |
2297 | ||
9d4139c7 AD |
2298 | INIT_LIST_HEAD(&net->xfrm.state_all); |
2299 | ||
f034b5d4 DM |
2300 | sz = sizeof(struct hlist_head) * 8; |
2301 | ||
73d189dc AD |
2302 | net->xfrm.state_bydst = xfrm_hash_alloc(sz); |
2303 | if (!net->xfrm.state_bydst) | |
2304 | goto out_bydst; | |
d320bbb3 AD |
2305 | net->xfrm.state_bysrc = xfrm_hash_alloc(sz); |
2306 | if (!net->xfrm.state_bysrc) | |
2307 | goto out_bysrc; | |
b754a4fd AD |
2308 | net->xfrm.state_byspi = xfrm_hash_alloc(sz); |
2309 | if (!net->xfrm.state_byspi) | |
2310 | goto out_byspi; | |
529983ec | 2311 | net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1); |
1da177e4 | 2312 | |
0bf7c5b0 | 2313 | net->xfrm.state_num = 0; |
63082733 | 2314 | INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize); |
283bc9f3 | 2315 | spin_lock_init(&net->xfrm.xfrm_state_lock); |
d62ddc21 | 2316 | return 0; |
73d189dc | 2317 | |
b754a4fd AD |
2318 | out_byspi: |
2319 | xfrm_hash_free(net->xfrm.state_bysrc, sz); | |
d320bbb3 AD |
2320 | out_bysrc: |
2321 | xfrm_hash_free(net->xfrm.state_bydst, sz); | |
73d189dc AD |
2322 | out_bydst: |
2323 | return -ENOMEM; | |
d62ddc21 AD |
2324 | } |
2325 | ||
2326 | void xfrm_state_fini(struct net *net) | |
2327 | { | |
73d189dc AD |
2328 | unsigned int sz; |
2329 | ||
7c2776ee | 2330 | flush_work(&net->xfrm.state_hash_work); |
2e71029e | 2331 | xfrm_state_flush(net, IPSEC_PROTO_ANY, false); |
35db57bb | 2332 | flush_work(&xfrm_state_gc_work); |
7c2776ee | 2333 | |
9d4139c7 | 2334 | WARN_ON(!list_empty(&net->xfrm.state_all)); |
73d189dc | 2335 | |
529983ec | 2336 | sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head); |
b754a4fd AD |
2337 | WARN_ON(!hlist_empty(net->xfrm.state_byspi)); |
2338 | xfrm_hash_free(net->xfrm.state_byspi, sz); | |
d320bbb3 AD |
2339 | WARN_ON(!hlist_empty(net->xfrm.state_bysrc)); |
2340 | xfrm_hash_free(net->xfrm.state_bysrc, sz); | |
73d189dc AD |
2341 | WARN_ON(!hlist_empty(net->xfrm.state_bydst)); |
2342 | xfrm_hash_free(net->xfrm.state_bydst, sz); | |
1da177e4 LT |
2343 | } |
2344 | ||
ab5f5e8b | 2345 | #ifdef CONFIG_AUDITSYSCALL |
cf35f43e IJ |
2346 | static void xfrm_audit_helper_sainfo(struct xfrm_state *x, |
2347 | struct audit_buffer *audit_buf) | |
ab5f5e8b | 2348 | { |
68277acc PM |
2349 | struct xfrm_sec_ctx *ctx = x->security; |
2350 | u32 spi = ntohl(x->id.spi); | |
2351 | ||
2352 | if (ctx) | |
ab5f5e8b | 2353 | audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s", |
68277acc | 2354 | ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str); |
ab5f5e8b | 2355 | |
9b7a787d | 2356 | switch (x->props.family) { |
ab5f5e8b | 2357 | case AF_INET: |
21454aaa HH |
2358 | audit_log_format(audit_buf, " src=%pI4 dst=%pI4", |
2359 | &x->props.saddr.a4, &x->id.daddr.a4); | |
ab5f5e8b JL |
2360 | break; |
2361 | case AF_INET6: | |
5b095d98 | 2362 | audit_log_format(audit_buf, " src=%pI6 dst=%pI6", |
fdb46ee7 | 2363 | x->props.saddr.a6, x->id.daddr.a6); |
ab5f5e8b JL |
2364 | break; |
2365 | } | |
68277acc PM |
2366 | |
2367 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
ab5f5e8b JL |
2368 | } |
2369 | ||
cf35f43e IJ |
2370 | static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family, |
2371 | struct audit_buffer *audit_buf) | |
afeb14b4 | 2372 | { |
b71d1d42 ED |
2373 | const struct iphdr *iph4; |
2374 | const struct ipv6hdr *iph6; | |
afeb14b4 PM |
2375 | |
2376 | switch (family) { | |
2377 | case AF_INET: | |
2378 | iph4 = ip_hdr(skb); | |
21454aaa HH |
2379 | audit_log_format(audit_buf, " src=%pI4 dst=%pI4", |
2380 | &iph4->saddr, &iph4->daddr); | |
afeb14b4 PM |
2381 | break; |
2382 | case AF_INET6: | |
2383 | iph6 = ipv6_hdr(skb); | |
2384 | audit_log_format(audit_buf, | |
5b095d98 | 2385 | " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x", |
9b7a787d | 2386 | &iph6->saddr, &iph6->daddr, |
afeb14b4 PM |
2387 | iph6->flow_lbl[0] & 0x0f, |
2388 | iph6->flow_lbl[1], | |
2389 | iph6->flow_lbl[2]); | |
2390 | break; | |
2391 | } | |
2392 | } | |
2393 | ||
2e71029e | 2394 | void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid) |
ab5f5e8b JL |
2395 | { |
2396 | struct audit_buffer *audit_buf; | |
ab5f5e8b | 2397 | |
afeb14b4 | 2398 | audit_buf = xfrm_audit_start("SAD-add"); |
ab5f5e8b JL |
2399 | if (audit_buf == NULL) |
2400 | return; | |
2e71029e | 2401 | xfrm_audit_helper_usrinfo(task_valid, audit_buf); |
afeb14b4 PM |
2402 | xfrm_audit_helper_sainfo(x, audit_buf); |
2403 | audit_log_format(audit_buf, " res=%u", result); | |
ab5f5e8b JL |
2404 | audit_log_end(audit_buf); |
2405 | } | |
2406 | EXPORT_SYMBOL_GPL(xfrm_audit_state_add); | |
2407 | ||
2e71029e | 2408 | void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid) |
ab5f5e8b JL |
2409 | { |
2410 | struct audit_buffer *audit_buf; | |
ab5f5e8b | 2411 | |
afeb14b4 | 2412 | audit_buf = xfrm_audit_start("SAD-delete"); |
ab5f5e8b JL |
2413 | if (audit_buf == NULL) |
2414 | return; | |
2e71029e | 2415 | xfrm_audit_helper_usrinfo(task_valid, audit_buf); |
afeb14b4 PM |
2416 | xfrm_audit_helper_sainfo(x, audit_buf); |
2417 | audit_log_format(audit_buf, " res=%u", result); | |
ab5f5e8b JL |
2418 | audit_log_end(audit_buf); |
2419 | } | |
2420 | EXPORT_SYMBOL_GPL(xfrm_audit_state_delete); | |
afeb14b4 PM |
2421 | |
2422 | void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
2423 | struct sk_buff *skb) | |
2424 | { | |
2425 | struct audit_buffer *audit_buf; | |
2426 | u32 spi; | |
2427 | ||
2428 | audit_buf = xfrm_audit_start("SA-replay-overflow"); | |
2429 | if (audit_buf == NULL) | |
2430 | return; | |
2431 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2432 | /* don't record the sequence number because it's inherent in this kind | |
2433 | * of audit message */ | |
2434 | spi = ntohl(x->id.spi); | |
2435 | audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); | |
2436 | audit_log_end(audit_buf); | |
2437 | } | |
2438 | EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow); | |
2439 | ||
9fdc4883 | 2440 | void xfrm_audit_state_replay(struct xfrm_state *x, |
afeb14b4 PM |
2441 | struct sk_buff *skb, __be32 net_seq) |
2442 | { | |
2443 | struct audit_buffer *audit_buf; | |
2444 | u32 spi; | |
2445 | ||
2446 | audit_buf = xfrm_audit_start("SA-replayed-pkt"); | |
2447 | if (audit_buf == NULL) | |
2448 | return; | |
2449 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2450 | spi = ntohl(x->id.spi); | |
2451 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2452 | spi, spi, ntohl(net_seq)); | |
2453 | audit_log_end(audit_buf); | |
2454 | } | |
9fdc4883 | 2455 | EXPORT_SYMBOL_GPL(xfrm_audit_state_replay); |
afeb14b4 PM |
2456 | |
2457 | void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family) | |
2458 | { | |
2459 | struct audit_buffer *audit_buf; | |
2460 | ||
2461 | audit_buf = xfrm_audit_start("SA-notfound"); | |
2462 | if (audit_buf == NULL) | |
2463 | return; | |
2464 | xfrm_audit_helper_pktinfo(skb, family, audit_buf); | |
2465 | audit_log_end(audit_buf); | |
2466 | } | |
2467 | EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple); | |
2468 | ||
2469 | void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
2470 | __be32 net_spi, __be32 net_seq) | |
2471 | { | |
2472 | struct audit_buffer *audit_buf; | |
2473 | u32 spi; | |
2474 | ||
2475 | audit_buf = xfrm_audit_start("SA-notfound"); | |
2476 | if (audit_buf == NULL) | |
2477 | return; | |
2478 | xfrm_audit_helper_pktinfo(skb, family, audit_buf); | |
2479 | spi = ntohl(net_spi); | |
2480 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2481 | spi, spi, ntohl(net_seq)); | |
2482 | audit_log_end(audit_buf); | |
2483 | } | |
2484 | EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound); | |
2485 | ||
2486 | void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
2487 | struct sk_buff *skb, u8 proto) | |
2488 | { | |
2489 | struct audit_buffer *audit_buf; | |
2490 | __be32 net_spi; | |
2491 | __be32 net_seq; | |
2492 | ||
2493 | audit_buf = xfrm_audit_start("SA-icv-failure"); | |
2494 | if (audit_buf == NULL) | |
2495 | return; | |
2496 | xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); | |
2497 | if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) { | |
2498 | u32 spi = ntohl(net_spi); | |
2499 | audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", | |
2500 | spi, spi, ntohl(net_seq)); | |
2501 | } | |
2502 | audit_log_end(audit_buf); | |
2503 | } | |
2504 | EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail); | |
ab5f5e8b | 2505 | #endif /* CONFIG_AUDITSYSCALL */ |