blob: 5b228f97d4b3308a950ae857828e04e90df86848 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Trent Jaegerdf718372005-12-13 23:12:27 -080013 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070014 */
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>
David S. Millerf034b5d2006-08-24 03:08:07 -070021#include <linux/cache.h>
Paul Moore68277ac2007-12-20 20:49:33 -080022#include <linux/audit.h>
Jesper Juhlb5890d82007-08-10 15:20:21 -070023#include <asm/uaccess.h>
Yury Polyanskiy9e0d57f2009-11-08 20:58:41 -080024#include <linux/ktime.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090025#include <linux/slab.h>
Yury Polyanskiy9e0d57f2009-11-08 20:58:41 -080026#include <linux/interrupt.h>
27#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028
David S. Miller44e36b42006-08-24 04:50:50 -070029#include "xfrm_hash.h"
30
Linus Torvalds1da177e2005-04-16 15:20:36 -070031/* Each xfrm_state may be linked to two tables:
32
33 1. Hash table by (spi,daddr,ah/esp) to find SA by SPI. (input,ctl)
David S. Millera624c102006-08-24 03:24:33 -070034 2. Hash table by (daddr,family,reqid) to find what SAs exist for given
Linus Torvalds1da177e2005-04-16 15:20:36 -070035 destination/tunnel endpoint. (output)
36 */
37
38static DEFINE_SPINLOCK(xfrm_state_lock);
39
David S. Millerf034b5d2006-08-24 03:08:07 -070040static unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024;
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
Herbert Xu17c2a422007-10-17 21:33:12 -070042static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
43static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo);
44
Alexey Dobriyan64d0cd02008-11-25 17:29:21 -080045static inline unsigned int xfrm_dst_hash(struct net *net,
David S. Miller2ab38502011-02-24 01:47:16 -050046 const xfrm_address_t *daddr,
47 const xfrm_address_t *saddr,
David S. Millerc1969f22006-08-24 04:00:03 -070048 u32 reqid,
David S. Millera624c102006-08-24 03:24:33 -070049 unsigned short family)
50{
Alexey Dobriyan64d0cd02008-11-25 17:29:21 -080051 return __xfrm_dst_hash(daddr, saddr, reqid, family, net->xfrm.state_hmask);
David S. Millera624c102006-08-24 03:24:33 -070052}
53
Alexey Dobriyan64d0cd02008-11-25 17:29:21 -080054static inline unsigned int xfrm_src_hash(struct net *net,
David S. Miller2ab38502011-02-24 01:47:16 -050055 const xfrm_address_t *daddr,
56 const xfrm_address_t *saddr,
David S. Miller44e36b42006-08-24 04:50:50 -070057 unsigned short family)
David S. Millerf034b5d2006-08-24 03:08:07 -070058{
Alexey Dobriyan64d0cd02008-11-25 17:29:21 -080059 return __xfrm_src_hash(daddr, saddr, family, net->xfrm.state_hmask);
David S. Millerf034b5d2006-08-24 03:08:07 -070060}
61
David S. Miller2575b652006-08-24 03:26:44 -070062static inline unsigned int
David S. Miller2ab38502011-02-24 01:47:16 -050063xfrm_spi_hash(struct net *net, const xfrm_address_t *daddr,
64 __be32 spi, u8 proto, unsigned short family)
David S. Millerf034b5d2006-08-24 03:08:07 -070065{
Alexey Dobriyan64d0cd02008-11-25 17:29:21 -080066 return __xfrm_spi_hash(daddr, spi, proto, family, net->xfrm.state_hmask);
David S. Millerf034b5d2006-08-24 03:08:07 -070067}
68
David S. Millerf034b5d2006-08-24 03:08:07 -070069static void xfrm_hash_transfer(struct hlist_head *list,
70 struct hlist_head *ndsttable,
71 struct hlist_head *nsrctable,
72 struct hlist_head *nspitable,
73 unsigned int nhashmask)
74{
75 struct hlist_node *entry, *tmp;
76 struct xfrm_state *x;
77
78 hlist_for_each_entry_safe(x, entry, tmp, list, bydst) {
79 unsigned int h;
80
David S. Millerc1969f22006-08-24 04:00:03 -070081 h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr,
82 x->props.reqid, x->props.family,
83 nhashmask);
David S. Millerf034b5d2006-08-24 03:08:07 -070084 hlist_add_head(&x->bydst, ndsttable+h);
85
Masahide NAKAMURA667bbcb2006-10-03 15:56:09 -070086 h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr,
87 x->props.family,
David S. Millerf034b5d2006-08-24 03:08:07 -070088 nhashmask);
89 hlist_add_head(&x->bysrc, nsrctable+h);
90
Masahide NAKAMURA7b4dc3602006-09-27 22:21:52 -070091 if (x->id.spi) {
92 h = __xfrm_spi_hash(&x->id.daddr, x->id.spi,
93 x->id.proto, x->props.family,
94 nhashmask);
95 hlist_add_head(&x->byspi, nspitable+h);
96 }
David S. Millerf034b5d2006-08-24 03:08:07 -070097 }
98}
99
Alexey Dobriyan63082732008-11-25 17:19:07 -0800100static unsigned long xfrm_hash_new_size(unsigned int state_hmask)
David S. Millerf034b5d2006-08-24 03:08:07 -0700101{
Alexey Dobriyan63082732008-11-25 17:19:07 -0800102 return ((state_hmask + 1) << 1) * sizeof(struct hlist_head);
David S. Millerf034b5d2006-08-24 03:08:07 -0700103}
104
105static DEFINE_MUTEX(hash_resize_mutex);
106
Alexey Dobriyan63082732008-11-25 17:19:07 -0800107static void xfrm_hash_resize(struct work_struct *work)
David S. Millerf034b5d2006-08-24 03:08:07 -0700108{
Alexey Dobriyan63082732008-11-25 17:19:07 -0800109 struct net *net = container_of(work, struct net, xfrm.state_hash_work);
David S. Millerf034b5d2006-08-24 03:08:07 -0700110 struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi;
111 unsigned long nsize, osize;
112 unsigned int nhashmask, ohashmask;
113 int i;
114
115 mutex_lock(&hash_resize_mutex);
116
Alexey Dobriyan63082732008-11-25 17:19:07 -0800117 nsize = xfrm_hash_new_size(net->xfrm.state_hmask);
David S. Miller44e36b42006-08-24 04:50:50 -0700118 ndst = xfrm_hash_alloc(nsize);
David S. Millerf034b5d2006-08-24 03:08:07 -0700119 if (!ndst)
120 goto out_unlock;
David S. Miller44e36b42006-08-24 04:50:50 -0700121 nsrc = xfrm_hash_alloc(nsize);
David S. Millerf034b5d2006-08-24 03:08:07 -0700122 if (!nsrc) {
David S. Miller44e36b42006-08-24 04:50:50 -0700123 xfrm_hash_free(ndst, nsize);
David S. Millerf034b5d2006-08-24 03:08:07 -0700124 goto out_unlock;
125 }
David S. Miller44e36b42006-08-24 04:50:50 -0700126 nspi = xfrm_hash_alloc(nsize);
David S. Millerf034b5d2006-08-24 03:08:07 -0700127 if (!nspi) {
David S. Miller44e36b42006-08-24 04:50:50 -0700128 xfrm_hash_free(ndst, nsize);
129 xfrm_hash_free(nsrc, nsize);
David S. Millerf034b5d2006-08-24 03:08:07 -0700130 goto out_unlock;
131 }
132
133 spin_lock_bh(&xfrm_state_lock);
134
135 nhashmask = (nsize / sizeof(struct hlist_head)) - 1U;
Alexey Dobriyan63082732008-11-25 17:19:07 -0800136 for (i = net->xfrm.state_hmask; i >= 0; i--)
137 xfrm_hash_transfer(net->xfrm.state_bydst+i, ndst, nsrc, nspi,
David S. Millerf034b5d2006-08-24 03:08:07 -0700138 nhashmask);
139
Alexey Dobriyan63082732008-11-25 17:19:07 -0800140 odst = net->xfrm.state_bydst;
141 osrc = net->xfrm.state_bysrc;
142 ospi = net->xfrm.state_byspi;
143 ohashmask = net->xfrm.state_hmask;
David S. Millerf034b5d2006-08-24 03:08:07 -0700144
Alexey Dobriyan63082732008-11-25 17:19:07 -0800145 net->xfrm.state_bydst = ndst;
146 net->xfrm.state_bysrc = nsrc;
147 net->xfrm.state_byspi = nspi;
148 net->xfrm.state_hmask = nhashmask;
David S. Millerf034b5d2006-08-24 03:08:07 -0700149
150 spin_unlock_bh(&xfrm_state_lock);
151
152 osize = (ohashmask + 1) * sizeof(struct hlist_head);
David S. Miller44e36b42006-08-24 04:50:50 -0700153 xfrm_hash_free(odst, osize);
154 xfrm_hash_free(osrc, osize);
155 xfrm_hash_free(ospi, osize);
David S. Millerf034b5d2006-08-24 03:08:07 -0700156
157out_unlock:
158 mutex_unlock(&hash_resize_mutex);
159}
160
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161static DEFINE_RWLOCK(xfrm_state_afinfo_lock);
162static struct xfrm_state_afinfo *xfrm_state_afinfo[NPROTO];
163
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164static DEFINE_SPINLOCK(xfrm_state_gc_lock);
165
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -0800166int __xfrm_state_delete(struct xfrm_state *x);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -0800168int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol);
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -0800169void km_state_expired(struct xfrm_state *x, int hard, u32 pid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170
Herbert Xuaa5d62c2007-10-17 21:31:12 -0700171static struct xfrm_state_afinfo *xfrm_state_lock_afinfo(unsigned int family)
172{
173 struct xfrm_state_afinfo *afinfo;
174 if (unlikely(family >= NPROTO))
175 return NULL;
176 write_lock_bh(&xfrm_state_afinfo_lock);
177 afinfo = xfrm_state_afinfo[family];
178 if (unlikely(!afinfo))
179 write_unlock_bh(&xfrm_state_afinfo_lock);
180 return afinfo;
181}
182
183static void xfrm_state_unlock_afinfo(struct xfrm_state_afinfo *afinfo)
Eric Dumazet9a429c42008-01-01 21:58:02 -0800184 __releases(xfrm_state_afinfo_lock)
Herbert Xuaa5d62c2007-10-17 21:31:12 -0700185{
186 write_unlock_bh(&xfrm_state_afinfo_lock);
187}
188
Eric Dumazet533cb5b2008-01-30 19:11:50 -0800189int xfrm_register_type(const struct xfrm_type *type, unsigned short family)
Herbert Xuaa5d62c2007-10-17 21:31:12 -0700190{
191 struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family);
Eric Dumazet533cb5b2008-01-30 19:11:50 -0800192 const struct xfrm_type **typemap;
Herbert Xuaa5d62c2007-10-17 21:31:12 -0700193 int err = 0;
194
195 if (unlikely(afinfo == NULL))
196 return -EAFNOSUPPORT;
197 typemap = afinfo->type_map;
198
199 if (likely(typemap[type->proto] == NULL))
200 typemap[type->proto] = type;
201 else
202 err = -EEXIST;
203 xfrm_state_unlock_afinfo(afinfo);
204 return err;
205}
206EXPORT_SYMBOL(xfrm_register_type);
207
Eric Dumazet533cb5b2008-01-30 19:11:50 -0800208int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family)
Herbert Xuaa5d62c2007-10-17 21:31:12 -0700209{
210 struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family);
Eric Dumazet533cb5b2008-01-30 19:11:50 -0800211 const struct xfrm_type **typemap;
Herbert Xuaa5d62c2007-10-17 21:31:12 -0700212 int err = 0;
213
214 if (unlikely(afinfo == NULL))
215 return -EAFNOSUPPORT;
216 typemap = afinfo->type_map;
217
218 if (unlikely(typemap[type->proto] != type))
219 err = -ENOENT;
220 else
221 typemap[type->proto] = NULL;
222 xfrm_state_unlock_afinfo(afinfo);
223 return err;
224}
225EXPORT_SYMBOL(xfrm_unregister_type);
226
Eric Dumazet533cb5b2008-01-30 19:11:50 -0800227static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family)
Herbert Xuaa5d62c2007-10-17 21:31:12 -0700228{
229 struct xfrm_state_afinfo *afinfo;
Eric Dumazet533cb5b2008-01-30 19:11:50 -0800230 const struct xfrm_type **typemap;
231 const struct xfrm_type *type;
Herbert Xuaa5d62c2007-10-17 21:31:12 -0700232 int modload_attempted = 0;
233
234retry:
235 afinfo = xfrm_state_get_afinfo(family);
236 if (unlikely(afinfo == NULL))
237 return NULL;
238 typemap = afinfo->type_map;
239
240 type = typemap[proto];
241 if (unlikely(type && !try_module_get(type->owner)))
242 type = NULL;
243 if (!type && !modload_attempted) {
244 xfrm_state_put_afinfo(afinfo);
245 request_module("xfrm-type-%d-%d", family, proto);
246 modload_attempted = 1;
247 goto retry;
248 }
249
250 xfrm_state_put_afinfo(afinfo);
251 return type;
252}
253
Eric Dumazet533cb5b2008-01-30 19:11:50 -0800254static void xfrm_put_type(const struct xfrm_type *type)
Herbert Xuaa5d62c2007-10-17 21:31:12 -0700255{
256 module_put(type->owner);
257}
258
259int xfrm_register_mode(struct xfrm_mode *mode, int family)
260{
261 struct xfrm_state_afinfo *afinfo;
262 struct xfrm_mode **modemap;
263 int err;
264
265 if (unlikely(mode->encap >= XFRM_MODE_MAX))
266 return -EINVAL;
267
268 afinfo = xfrm_state_lock_afinfo(family);
269 if (unlikely(afinfo == NULL))
270 return -EAFNOSUPPORT;
271
272 err = -EEXIST;
273 modemap = afinfo->mode_map;
Herbert Xu17c2a422007-10-17 21:33:12 -0700274 if (modemap[mode->encap])
275 goto out;
Herbert Xuaa5d62c2007-10-17 21:31:12 -0700276
Herbert Xu17c2a422007-10-17 21:33:12 -0700277 err = -ENOENT;
278 if (!try_module_get(afinfo->owner))
279 goto out;
280
281 mode->afinfo = afinfo;
282 modemap[mode->encap] = mode;
283 err = 0;
284
285out:
Herbert Xuaa5d62c2007-10-17 21:31:12 -0700286 xfrm_state_unlock_afinfo(afinfo);
287 return err;
288}
289EXPORT_SYMBOL(xfrm_register_mode);
290
291int xfrm_unregister_mode(struct xfrm_mode *mode, int family)
292{
293 struct xfrm_state_afinfo *afinfo;
294 struct xfrm_mode **modemap;
295 int err;
296
297 if (unlikely(mode->encap >= XFRM_MODE_MAX))
298 return -EINVAL;
299
300 afinfo = xfrm_state_lock_afinfo(family);
301 if (unlikely(afinfo == NULL))
302 return -EAFNOSUPPORT;
303
304 err = -ENOENT;
305 modemap = afinfo->mode_map;
306 if (likely(modemap[mode->encap] == mode)) {
307 modemap[mode->encap] = NULL;
Herbert Xu17c2a422007-10-17 21:33:12 -0700308 module_put(mode->afinfo->owner);
Herbert Xuaa5d62c2007-10-17 21:31:12 -0700309 err = 0;
310 }
311
312 xfrm_state_unlock_afinfo(afinfo);
313 return err;
314}
315EXPORT_SYMBOL(xfrm_unregister_mode);
316
317static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family)
318{
319 struct xfrm_state_afinfo *afinfo;
320 struct xfrm_mode *mode;
321 int modload_attempted = 0;
322
323 if (unlikely(encap >= XFRM_MODE_MAX))
324 return NULL;
325
326retry:
327 afinfo = xfrm_state_get_afinfo(family);
328 if (unlikely(afinfo == NULL))
329 return NULL;
330
331 mode = afinfo->mode_map[encap];
332 if (unlikely(mode && !try_module_get(mode->owner)))
333 mode = NULL;
334 if (!mode && !modload_attempted) {
335 xfrm_state_put_afinfo(afinfo);
336 request_module("xfrm-mode-%d-%d", family, encap);
337 modload_attempted = 1;
338 goto retry;
339 }
340
341 xfrm_state_put_afinfo(afinfo);
342 return mode;
343}
344
345static void xfrm_put_mode(struct xfrm_mode *mode)
346{
347 module_put(mode->owner);
348}
349
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350static void xfrm_state_gc_destroy(struct xfrm_state *x)
351{
Yury Polyanskiy9e0d57f2009-11-08 20:58:41 -0800352 tasklet_hrtimer_cancel(&x->mtimer);
David S. Millera47f0ce2006-08-24 03:54:22 -0700353 del_timer_sync(&x->rtimer);
Jesper Juhla51482b2005-11-08 09:41:34 -0800354 kfree(x->aalg);
355 kfree(x->ealg);
356 kfree(x->calg);
357 kfree(x->encap);
Noriaki TAKAMIYA060f02a2006-08-23 18:18:55 -0700358 kfree(x->coaddr);
Steffen Klassertd8647b72011-03-08 00:10:27 +0000359 kfree(x->replay_esn);
360 kfree(x->preplay_esn);
Herbert Xu13996372007-10-17 21:35:51 -0700361 if (x->inner_mode)
362 xfrm_put_mode(x->inner_mode);
Kazunori MIYAZAWAdf9dcb42008-03-24 14:51:51 -0700363 if (x->inner_mode_iaf)
364 xfrm_put_mode(x->inner_mode_iaf);
Herbert Xu13996372007-10-17 21:35:51 -0700365 if (x->outer_mode)
366 xfrm_put_mode(x->outer_mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367 if (x->type) {
368 x->type->destructor(x);
369 xfrm_put_type(x->type);
370 }
Trent Jaegerdf718372005-12-13 23:12:27 -0800371 security_xfrm_state_free(x);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372 kfree(x);
373}
374
Alexey Dobriyanc7837142008-11-25 17:20:36 -0800375static void xfrm_state_gc_task(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376{
Alexey Dobriyanc7837142008-11-25 17:20:36 -0800377 struct net *net = container_of(work, struct net, xfrm.state_gc_work);
Herbert Xu12a169e2008-10-01 07:03:24 -0700378 struct xfrm_state *x;
379 struct hlist_node *entry, *tmp;
380 struct hlist_head gc_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 spin_lock_bh(&xfrm_state_gc_lock);
Alexey Dobriyanc7837142008-11-25 17:20:36 -0800383 hlist_move_list(&net->xfrm.state_gc_list, &gc_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 spin_unlock_bh(&xfrm_state_gc_lock);
385
Herbert Xu12a169e2008-10-01 07:03:24 -0700386 hlist_for_each_entry_safe(x, entry, tmp, &gc_list, gclist)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 xfrm_state_gc_destroy(x);
David S. Miller8f126e32006-08-24 02:45:07 -0700388
Alexey Dobriyan50a30652008-11-25 17:21:01 -0800389 wake_up(&net->xfrm.km_waitq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390}
391
392static inline unsigned long make_jiffies(long secs)
393{
394 if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ)
395 return MAX_SCHEDULE_TIMEOUT-1;
396 else
YOSHIFUJI Hideakia716c112007-02-09 23:25:29 +0900397 return secs*HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398}
399
Yury Polyanskiy9e0d57f2009-11-08 20:58:41 -0800400static enum hrtimer_restart xfrm_timer_handler(struct hrtimer * me)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401{
Yury Polyanskiy9e0d57f2009-11-08 20:58:41 -0800402 struct tasklet_hrtimer *thr = container_of(me, struct tasklet_hrtimer, timer);
403 struct xfrm_state *x = container_of(thr, struct xfrm_state, mtimer);
Alexey Dobriyan98806f72008-11-25 17:29:47 -0800404 struct net *net = xs_net(x);
James Morris9d729f72007-03-04 16:12:44 -0800405 unsigned long now = get_seconds();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 long next = LONG_MAX;
407 int warn = 0;
Joy Latten161a09e2006-11-27 13:11:54 -0600408 int err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409
410 spin_lock(&x->lock);
411 if (x->km.state == XFRM_STATE_DEAD)
412 goto out;
413 if (x->km.state == XFRM_STATE_EXPIRED)
414 goto expired;
415 if (x->lft.hard_add_expires_seconds) {
416 long tmo = x->lft.hard_add_expires_seconds +
417 x->curlft.add_time - now;
418 if (tmo <= 0)
419 goto expired;
420 if (tmo < next)
421 next = tmo;
422 }
423 if (x->lft.hard_use_expires_seconds) {
424 long tmo = x->lft.hard_use_expires_seconds +
425 (x->curlft.use_time ? : now) - now;
426 if (tmo <= 0)
427 goto expired;
428 if (tmo < next)
429 next = tmo;
430 }
431 if (x->km.dying)
432 goto resched;
433 if (x->lft.soft_add_expires_seconds) {
434 long tmo = x->lft.soft_add_expires_seconds +
435 x->curlft.add_time - now;
436 if (tmo <= 0)
437 warn = 1;
438 else if (tmo < next)
439 next = tmo;
440 }
441 if (x->lft.soft_use_expires_seconds) {
442 long tmo = x->lft.soft_use_expires_seconds +
443 (x->curlft.use_time ? : now) - now;
444 if (tmo <= 0)
445 warn = 1;
446 else if (tmo < next)
447 next = tmo;
448 }
449
Herbert Xu4666faa2005-06-18 22:43:22 -0700450 x->km.dying = warn;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 if (warn)
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -0800452 km_state_expired(x, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453resched:
Yury Polyanskiy9e0d57f2009-11-08 20:58:41 -0800454 if (next != LONG_MAX){
455 tasklet_hrtimer_start(&x->mtimer, ktime_set(next, 0), HRTIMER_MODE_REL);
456 }
David S. Millera47f0ce2006-08-24 03:54:22 -0700457
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 goto out;
459
460expired:
461 if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) {
462 x->km.state = XFRM_STATE_EXPIRED;
Alexey Dobriyan98806f72008-11-25 17:29:47 -0800463 wake_up(&net->xfrm.km_waitq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 next = 2;
465 goto resched;
466 }
Joy Latten161a09e2006-11-27 13:11:54 -0600467
468 err = __xfrm_state_delete(x);
469 if (!err && x->id.spi)
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -0800470 km_state_expired(x, 1, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471
Joy Lattenab5f5e82007-09-17 11:51:22 -0700472 xfrm_audit_state_delete(x, err ? 0 : 1,
Eric Paris25323862008-04-18 10:09:25 -0400473 audit_get_loginuid(current),
474 audit_get_sessionid(current), 0);
Joy Latten161a09e2006-11-27 13:11:54 -0600475
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476out:
477 spin_unlock(&x->lock);
Yury Polyanskiy9e0d57f2009-11-08 20:58:41 -0800478 return HRTIMER_NORESTART;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479}
480
David S. Miller0ac84752006-03-20 19:18:23 -0800481static void xfrm_replay_timer_handler(unsigned long data);
482
Alexey Dobriyan673c09b2008-11-25 17:15:16 -0800483struct xfrm_state *xfrm_state_alloc(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484{
485 struct xfrm_state *x;
486
Panagiotis Issaris0da974f2006-07-21 14:51:30 -0700487 x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488
489 if (x) {
Alexey Dobriyan673c09b2008-11-25 17:15:16 -0800490 write_pnet(&x->xs_net, net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 atomic_set(&x->refcnt, 1);
492 atomic_set(&x->tunnel_users, 0);
Herbert Xu12a169e2008-10-01 07:03:24 -0700493 INIT_LIST_HEAD(&x->km.all);
David S. Miller8f126e32006-08-24 02:45:07 -0700494 INIT_HLIST_NODE(&x->bydst);
495 INIT_HLIST_NODE(&x->bysrc);
496 INIT_HLIST_NODE(&x->byspi);
Yury Polyanskiy9e0d57f2009-11-08 20:58:41 -0800497 tasklet_hrtimer_init(&x->mtimer, xfrm_timer_handler, CLOCK_REALTIME, HRTIMER_MODE_ABS);
Pavel Emelyanovb24b8a22008-01-23 21:20:07 -0800498 setup_timer(&x->rtimer, xfrm_replay_timer_handler,
499 (unsigned long)x);
James Morris9d729f72007-03-04 16:12:44 -0800500 x->curlft.add_time = get_seconds();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 x->lft.soft_byte_limit = XFRM_INF;
502 x->lft.soft_packet_limit = XFRM_INF;
503 x->lft.hard_byte_limit = XFRM_INF;
504 x->lft.hard_packet_limit = XFRM_INF;
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800505 x->replay_maxage = 0;
506 x->replay_maxdiff = 0;
Kazunori MIYAZAWAdf9dcb42008-03-24 14:51:51 -0700507 x->inner_mode = NULL;
508 x->inner_mode_iaf = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 spin_lock_init(&x->lock);
510 }
511 return x;
512}
513EXPORT_SYMBOL(xfrm_state_alloc);
514
515void __xfrm_state_destroy(struct xfrm_state *x)
516{
Alexey Dobriyan98806f72008-11-25 17:29:47 -0800517 struct net *net = xs_net(x);
518
Ilpo Järvinen547b7922008-07-25 21:43:18 -0700519 WARN_ON(x->km.state != XFRM_STATE_DEAD);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520
521 spin_lock_bh(&xfrm_state_gc_lock);
Alexey Dobriyan98806f72008-11-25 17:29:47 -0800522 hlist_add_head(&x->gclist, &net->xfrm.state_gc_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523 spin_unlock_bh(&xfrm_state_gc_lock);
Alexey Dobriyan98806f72008-11-25 17:29:47 -0800524 schedule_work(&net->xfrm.state_gc_work);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525}
526EXPORT_SYMBOL(__xfrm_state_destroy);
527
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -0800528int __xfrm_state_delete(struct xfrm_state *x)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529{
Alexey Dobriyan98806f72008-11-25 17:29:47 -0800530 struct net *net = xs_net(x);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700531 int err = -ESRCH;
532
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 if (x->km.state != XFRM_STATE_DEAD) {
534 x->km.state = XFRM_STATE_DEAD;
535 spin_lock(&xfrm_state_lock);
Herbert Xu12a169e2008-10-01 07:03:24 -0700536 list_del(&x->km.all);
David S. Miller8f126e32006-08-24 02:45:07 -0700537 hlist_del(&x->bydst);
David S. Miller8f126e32006-08-24 02:45:07 -0700538 hlist_del(&x->bysrc);
David S. Millera47f0ce2006-08-24 03:54:22 -0700539 if (x->id.spi)
David S. Miller8f126e32006-08-24 02:45:07 -0700540 hlist_del(&x->byspi);
Alexey Dobriyan98806f72008-11-25 17:29:47 -0800541 net->xfrm.state_num--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 spin_unlock(&xfrm_state_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544 /* All xfrm_state objects are created by xfrm_state_alloc.
545 * The xfrm_state_alloc call gives a reference, and that
546 * is what we are dropping here.
547 */
Patrick McHardy5dba4792007-11-27 11:10:07 +0800548 xfrm_state_put(x);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700549 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 }
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700551
552 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553}
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -0800554EXPORT_SYMBOL(__xfrm_state_delete);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700556int xfrm_state_delete(struct xfrm_state *x)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557{
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700558 int err;
559
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 spin_lock_bh(&x->lock);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700561 err = __xfrm_state_delete(x);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562 spin_unlock_bh(&x->lock);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700563
564 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565}
566EXPORT_SYMBOL(xfrm_state_delete);
567
Joy Latten4aa2e622007-06-04 19:05:57 -0400568#ifdef CONFIG_SECURITY_NETWORK_XFRM
569static inline int
Alexey Dobriyan0e602452008-11-25 17:30:18 -0800570xfrm_state_flush_secctx_check(struct net *net, u8 proto, struct xfrm_audit *audit_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571{
Joy Latten4aa2e622007-06-04 19:05:57 -0400572 int i, err = 0;
573
Alexey Dobriyan0e602452008-11-25 17:30:18 -0800574 for (i = 0; i <= net->xfrm.state_hmask; i++) {
Joy Latten4aa2e622007-06-04 19:05:57 -0400575 struct hlist_node *entry;
576 struct xfrm_state *x;
577
Alexey Dobriyan0e602452008-11-25 17:30:18 -0800578 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+i, bydst) {
Joy Latten4aa2e622007-06-04 19:05:57 -0400579 if (xfrm_id_proto_match(x->id.proto, proto) &&
580 (err = security_xfrm_state_delete(x)) != 0) {
Joy Lattenab5f5e82007-09-17 11:51:22 -0700581 xfrm_audit_state_delete(x, 0,
582 audit_info->loginuid,
Eric Paris25323862008-04-18 10:09:25 -0400583 audit_info->sessionid,
Joy Lattenab5f5e82007-09-17 11:51:22 -0700584 audit_info->secid);
Joy Latten4aa2e622007-06-04 19:05:57 -0400585 return err;
586 }
587 }
588 }
589
590 return err;
591}
592#else
593static inline int
Alexey Dobriyan0e602452008-11-25 17:30:18 -0800594xfrm_state_flush_secctx_check(struct net *net, u8 proto, struct xfrm_audit *audit_info)
Joy Latten4aa2e622007-06-04 19:05:57 -0400595{
596 return 0;
597}
598#endif
599
Alexey Dobriyan0e602452008-11-25 17:30:18 -0800600int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info)
Joy Latten4aa2e622007-06-04 19:05:57 -0400601{
Jamal Hadi Salim9e64cc92010-02-19 02:00:41 +0000602 int i, err = 0, cnt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603
604 spin_lock_bh(&xfrm_state_lock);
Alexey Dobriyan0e602452008-11-25 17:30:18 -0800605 err = xfrm_state_flush_secctx_check(net, proto, audit_info);
Joy Latten4aa2e622007-06-04 19:05:57 -0400606 if (err)
607 goto out;
608
Jamal Hadi Salim9e64cc92010-02-19 02:00:41 +0000609 err = -ESRCH;
Alexey Dobriyan0e602452008-11-25 17:30:18 -0800610 for (i = 0; i <= net->xfrm.state_hmask; i++) {
David S. Miller8f126e32006-08-24 02:45:07 -0700611 struct hlist_node *entry;
612 struct xfrm_state *x;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613restart:
Alexey Dobriyan0e602452008-11-25 17:30:18 -0800614 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+i, bydst) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 if (!xfrm_state_kern(x) &&
Masahide NAKAMURA57947082006-09-22 15:06:24 -0700616 xfrm_id_proto_match(x->id.proto, proto)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617 xfrm_state_hold(x);
618 spin_unlock_bh(&xfrm_state_lock);
619
Joy Latten161a09e2006-11-27 13:11:54 -0600620 err = xfrm_state_delete(x);
Joy Lattenab5f5e82007-09-17 11:51:22 -0700621 xfrm_audit_state_delete(x, err ? 0 : 1,
622 audit_info->loginuid,
Eric Paris25323862008-04-18 10:09:25 -0400623 audit_info->sessionid,
Joy Lattenab5f5e82007-09-17 11:51:22 -0700624 audit_info->secid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 xfrm_state_put(x);
Jamal Hadi Salim9e64cc92010-02-19 02:00:41 +0000626 if (!err)
627 cnt++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628
629 spin_lock_bh(&xfrm_state_lock);
630 goto restart;
631 }
632 }
633 }
Jamal Hadi Salim9e64cc92010-02-19 02:00:41 +0000634 if (cnt)
635 err = 0;
Joy Latten4aa2e622007-06-04 19:05:57 -0400636
637out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 spin_unlock_bh(&xfrm_state_lock);
Alexey Dobriyan0e602452008-11-25 17:30:18 -0800639 wake_up(&net->xfrm.km_waitq);
Joy Latten4aa2e622007-06-04 19:05:57 -0400640 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641}
642EXPORT_SYMBOL(xfrm_state_flush);
643
Alexey Dobriyane0710412010-01-23 13:37:10 +0000644void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si)
Jamal Hadi Salim28d89092007-04-26 00:10:29 -0700645{
646 spin_lock_bh(&xfrm_state_lock);
Alexey Dobriyane0710412010-01-23 13:37:10 +0000647 si->sadcnt = net->xfrm.state_num;
648 si->sadhcnt = net->xfrm.state_hmask;
Jamal Hadi Salim28d89092007-04-26 00:10:29 -0700649 si->sadhmcnt = xfrm_state_hashmax;
650 spin_unlock_bh(&xfrm_state_lock);
651}
652EXPORT_SYMBOL(xfrm_sad_getinfo);
653
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654static int
David S. Miller1a898592011-02-22 18:22:34 -0800655xfrm_init_tempstate(struct xfrm_state *x, const struct flowi *fl,
David S. Miller04686012011-02-24 01:50:12 -0500656 const struct xfrm_tmpl *tmpl,
David S. Miller33765d02011-02-24 01:55:45 -0500657 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
Thomas Egerer8444cf72010-09-20 11:11:38 -0700658 unsigned short family)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659{
660 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
661 if (!afinfo)
662 return -1;
Thomas Egerer8444cf72010-09-20 11:11:38 -0700663 afinfo->init_tempsel(&x->sel, fl);
664
665 if (family != tmpl->encap_family) {
666 xfrm_state_put_afinfo(afinfo);
667 afinfo = xfrm_state_get_afinfo(tmpl->encap_family);
668 if (!afinfo)
669 return -1;
670 }
671 afinfo->init_temprop(x, tmpl, daddr, saddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672 xfrm_state_put_afinfo(afinfo);
673 return 0;
674}
675
David S. Miller9aa60082011-02-24 01:51:36 -0500676static struct xfrm_state *__xfrm_state_lookup(struct net *net, u32 mark,
677 const xfrm_address_t *daddr,
678 __be32 spi, u8 proto,
679 unsigned short family)
David S. Milleredcd5822006-08-24 00:42:45 -0700680{
Alexey Dobriyan221df1e2008-11-25 17:30:50 -0800681 unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family);
David S. Milleredcd5822006-08-24 00:42:45 -0700682 struct xfrm_state *x;
David S. Miller8f126e32006-08-24 02:45:07 -0700683 struct hlist_node *entry;
David S. Milleredcd5822006-08-24 00:42:45 -0700684
Alexey Dobriyan221df1e2008-11-25 17:30:50 -0800685 hlist_for_each_entry(x, entry, net->xfrm.state_byspi+h, byspi) {
David S. Milleredcd5822006-08-24 00:42:45 -0700686 if (x->props.family != family ||
687 x->id.spi != spi ||
Wei Yongjun18025712009-06-28 18:42:53 +0000688 x->id.proto != proto ||
689 xfrm_addr_cmp(&x->id.daddr, daddr, family))
David S. Milleredcd5822006-08-24 00:42:45 -0700690 continue;
691
Jamal Hadi Salim3d6acfa2010-02-22 11:32:56 +0000692 if ((mark & x->mark.m) != x->mark.v)
693 continue;
David S. Milleredcd5822006-08-24 00:42:45 -0700694 xfrm_state_hold(x);
695 return x;
696 }
697
698 return NULL;
699}
700
David S. Miller9aa60082011-02-24 01:51:36 -0500701static struct xfrm_state *__xfrm_state_lookup_byaddr(struct net *net, u32 mark,
702 const xfrm_address_t *daddr,
703 const xfrm_address_t *saddr,
704 u8 proto, unsigned short family)
David S. Milleredcd5822006-08-24 00:42:45 -0700705{
Alexey Dobriyan221df1e2008-11-25 17:30:50 -0800706 unsigned int h = xfrm_src_hash(net, daddr, saddr, family);
David S. Milleredcd5822006-08-24 00:42:45 -0700707 struct xfrm_state *x;
David S. Miller8f126e32006-08-24 02:45:07 -0700708 struct hlist_node *entry;
David S. Milleredcd5822006-08-24 00:42:45 -0700709
Alexey Dobriyan221df1e2008-11-25 17:30:50 -0800710 hlist_for_each_entry(x, entry, net->xfrm.state_bysrc+h, bysrc) {
David S. Milleredcd5822006-08-24 00:42:45 -0700711 if (x->props.family != family ||
Wei Yongjun18025712009-06-28 18:42:53 +0000712 x->id.proto != proto ||
713 xfrm_addr_cmp(&x->id.daddr, daddr, family) ||
714 xfrm_addr_cmp(&x->props.saddr, saddr, family))
David S. Milleredcd5822006-08-24 00:42:45 -0700715 continue;
716
Jamal Hadi Salim3d6acfa2010-02-22 11:32:56 +0000717 if ((mark & x->mark.m) != x->mark.v)
718 continue;
David S. Milleredcd5822006-08-24 00:42:45 -0700719 xfrm_state_hold(x);
720 return x;
721 }
722
723 return NULL;
724}
725
726static inline struct xfrm_state *
727__xfrm_state_locate(struct xfrm_state *x, int use_spi, int family)
728{
Alexey Dobriyan221df1e2008-11-25 17:30:50 -0800729 struct net *net = xs_net(x);
Jamal Hadi Salimbd557752010-02-22 16:20:22 -0800730 u32 mark = x->mark.v & x->mark.m;
Alexey Dobriyan221df1e2008-11-25 17:30:50 -0800731
David S. Milleredcd5822006-08-24 00:42:45 -0700732 if (use_spi)
Jamal Hadi Salimbd557752010-02-22 16:20:22 -0800733 return __xfrm_state_lookup(net, mark, &x->id.daddr,
734 x->id.spi, x->id.proto, family);
David S. Milleredcd5822006-08-24 00:42:45 -0700735 else
Jamal Hadi Salimbd557752010-02-22 16:20:22 -0800736 return __xfrm_state_lookup_byaddr(net, mark,
737 &x->id.daddr,
David S. Milleredcd5822006-08-24 00:42:45 -0700738 &x->props.saddr,
739 x->id.proto, family);
740}
741
Alexey Dobriyan98806f72008-11-25 17:29:47 -0800742static void xfrm_hash_grow_check(struct net *net, int have_hash_collision)
Patrick McHardy2fab22f2006-10-24 15:34:00 -0700743{
744 if (have_hash_collision &&
Alexey Dobriyan98806f72008-11-25 17:29:47 -0800745 (net->xfrm.state_hmask + 1) < xfrm_state_hashmax &&
746 net->xfrm.state_num > net->xfrm.state_hmask)
747 schedule_work(&net->xfrm.state_hash_work);
Patrick McHardy2fab22f2006-10-24 15:34:00 -0700748}
749
David S. Miller08ec9af2009-03-13 14:22:40 -0700750static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x,
David S. Miller4a08ab02011-02-22 18:21:31 -0800751 const struct flowi *fl, unsigned short family,
David S. Miller08ec9af2009-03-13 14:22:40 -0700752 struct xfrm_state **best, int *acq_in_progress,
753 int *error)
754{
755 /* Resolution logic:
756 * 1. There is a valid state with matching selector. Done.
757 * 2. Valid state with inappropriate selector. Skip.
758 *
759 * Entering area of "sysdeps".
760 *
761 * 3. If state is not valid, selector is temporary, it selects
762 * only session which triggered previous resolution. Key
763 * manager will do something to install a state with proper
764 * selector.
765 */
766 if (x->km.state == XFRM_STATE_VALID) {
767 if ((x->sel.family &&
768 !xfrm_selector_match(&x->sel, fl, x->sel.family)) ||
769 !security_xfrm_state_pol_flow_match(x, pol, fl))
770 return;
771
772 if (!*best ||
773 (*best)->km.dying > x->km.dying ||
774 ((*best)->km.dying == x->km.dying &&
775 (*best)->curlft.add_time < x->curlft.add_time))
776 *best = x;
777 } else if (x->km.state == XFRM_STATE_ACQ) {
778 *acq_in_progress = 1;
779 } else if (x->km.state == XFRM_STATE_ERROR ||
780 x->km.state == XFRM_STATE_EXPIRED) {
781 if (xfrm_selector_match(&x->sel, fl, x->sel.family) &&
782 security_xfrm_state_pol_flow_match(x, pol, fl))
783 *error = -ESRCH;
784 }
785}
786
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787struct xfrm_state *
David S. Miller33765d02011-02-24 01:55:45 -0500788xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr,
David S. Millerb520e9f2011-02-22 18:24:19 -0800789 const struct flowi *fl, struct xfrm_tmpl *tmpl,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790 struct xfrm_policy *pol, int *err,
791 unsigned short family)
792{
David S. Miller08ec9af2009-03-13 14:22:40 -0700793 static xfrm_address_t saddr_wildcard = { };
Alexey Dobriyan5447c5e2008-11-25 17:31:51 -0800794 struct net *net = xp_net(pol);
Nicolas Dichtel6a783c92009-04-27 02:58:59 -0700795 unsigned int h, h_wildcard;
David S. Miller8f126e32006-08-24 02:45:07 -0700796 struct hlist_node *entry;
David S. Miller37b08e32008-09-02 20:14:15 -0700797 struct xfrm_state *x, *x0, *to_put;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798 int acquire_in_progress = 0;
799 int error = 0;
800 struct xfrm_state *best = NULL;
Jamal Hadi Salimbd557752010-02-22 16:20:22 -0800801 u32 mark = pol->mark.v & pol->mark.m;
Thomas Egerer8444cf72010-09-20 11:11:38 -0700802 unsigned short encap_family = tmpl->encap_family;
YOSHIFUJI Hideakia716c112007-02-09 23:25:29 +0900803
David S. Miller37b08e32008-09-02 20:14:15 -0700804 to_put = NULL;
805
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806 spin_lock_bh(&xfrm_state_lock);
Thomas Egerer8444cf72010-09-20 11:11:38 -0700807 h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family);
Alexey Dobriyan5447c5e2008-11-25 17:31:51 -0800808 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
Thomas Egerer8444cf72010-09-20 11:11:38 -0700809 if (x->props.family == encap_family &&
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810 x->props.reqid == tmpl->reqid &&
Jamal Hadi Salim3d6acfa2010-02-22 11:32:56 +0000811 (mark & x->mark.m) == x->mark.v &&
Masahide NAKAMURAfbd9a5b2006-08-23 18:08:21 -0700812 !(x->props.flags & XFRM_STATE_WILDRECV) &&
Thomas Egerer8444cf72010-09-20 11:11:38 -0700813 xfrm_state_addr_check(x, daddr, saddr, encap_family) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814 tmpl->mode == x->props.mode &&
815 tmpl->id.proto == x->id.proto &&
David S. Miller08ec9af2009-03-13 14:22:40 -0700816 (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
David S. Miller1f673c52011-02-24 01:53:13 -0500817 xfrm_state_look_at(pol, x, fl, encap_family,
David S. Miller08ec9af2009-03-13 14:22:40 -0700818 &best, &acquire_in_progress, &error);
819 }
820 if (best)
821 goto found;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822
Thomas Egerer8444cf72010-09-20 11:11:38 -0700823 h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, encap_family);
Nicolas Dichtel6a783c92009-04-27 02:58:59 -0700824 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h_wildcard, bydst) {
Thomas Egerer8444cf72010-09-20 11:11:38 -0700825 if (x->props.family == encap_family &&
David S. Miller08ec9af2009-03-13 14:22:40 -0700826 x->props.reqid == tmpl->reqid &&
Jamal Hadi Salim3d6acfa2010-02-22 11:32:56 +0000827 (mark & x->mark.m) == x->mark.v &&
David S. Miller08ec9af2009-03-13 14:22:40 -0700828 !(x->props.flags & XFRM_STATE_WILDRECV) &&
Thomas Egerer8444cf72010-09-20 11:11:38 -0700829 xfrm_state_addr_check(x, daddr, saddr, encap_family) &&
David S. Miller08ec9af2009-03-13 14:22:40 -0700830 tmpl->mode == x->props.mode &&
831 tmpl->id.proto == x->id.proto &&
832 (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
David S. Miller1f673c52011-02-24 01:53:13 -0500833 xfrm_state_look_at(pol, x, fl, encap_family,
David S. Miller08ec9af2009-03-13 14:22:40 -0700834 &best, &acquire_in_progress, &error);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835 }
836
David S. Miller08ec9af2009-03-13 14:22:40 -0700837found:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838 x = best;
839 if (!x && !error && !acquire_in_progress) {
Patrick McHardy5c5d2812005-04-21 20:12:32 -0700840 if (tmpl->id.spi &&
Jamal Hadi Salimbd557752010-02-22 16:20:22 -0800841 (x0 = __xfrm_state_lookup(net, mark, daddr, tmpl->id.spi,
Thomas Egerer8444cf72010-09-20 11:11:38 -0700842 tmpl->id.proto, encap_family)) != NULL) {
David S. Miller37b08e32008-09-02 20:14:15 -0700843 to_put = x0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844 error = -EEXIST;
845 goto out;
846 }
Alexey Dobriyan5447c5e2008-11-25 17:31:51 -0800847 x = xfrm_state_alloc(net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848 if (x == NULL) {
849 error = -ENOMEM;
850 goto out;
851 }
Thomas Egerer8444cf72010-09-20 11:11:38 -0700852 /* Initialize temporary state matching only
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853 * to current session. */
Thomas Egerer8444cf72010-09-20 11:11:38 -0700854 xfrm_init_tempstate(x, fl, tmpl, daddr, saddr, family);
Jamal Hadi Salimbd557752010-02-22 16:20:22 -0800855 memcpy(&x->mark, &pol->mark, sizeof(x->mark));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856
David S. Miller1d28f422011-03-12 00:29:39 -0500857 error = security_xfrm_state_alloc_acquire(x, pol->security, fl->flowi_secid);
Venkat Yekkiralae0d1caa2006-07-24 23:29:07 -0700858 if (error) {
859 x->km.state = XFRM_STATE_DEAD;
David S. Miller37b08e32008-09-02 20:14:15 -0700860 to_put = x;
Venkat Yekkiralae0d1caa2006-07-24 23:29:07 -0700861 x = NULL;
862 goto out;
863 }
864
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865 if (km_query(x, tmpl, pol) == 0) {
866 x->km.state = XFRM_STATE_ACQ;
Alexey Dobriyan5447c5e2008-11-25 17:31:51 -0800867 list_add(&x->km.all, &net->xfrm.state_all);
868 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
Thomas Egerer8444cf72010-09-20 11:11:38 -0700869 h = xfrm_src_hash(net, daddr, saddr, encap_family);
Alexey Dobriyan5447c5e2008-11-25 17:31:51 -0800870 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871 if (x->id.spi) {
Thomas Egerer8444cf72010-09-20 11:11:38 -0700872 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, encap_family);
Alexey Dobriyan5447c5e2008-11-25 17:31:51 -0800873 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874 }
Alexey Dobriyanb27aead2008-11-25 18:00:48 -0800875 x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
Yury Polyanskiy9e0d57f2009-11-08 20:58:41 -0800876 tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL);
Alexey Dobriyan5447c5e2008-11-25 17:31:51 -0800877 net->xfrm.state_num++;
878 xfrm_hash_grow_check(net, x->bydst.next != NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879 } else {
880 x->km.state = XFRM_STATE_DEAD;
David S. Miller37b08e32008-09-02 20:14:15 -0700881 to_put = x;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882 x = NULL;
883 error = -ESRCH;
884 }
885 }
886out:
887 if (x)
888 xfrm_state_hold(x);
889 else
890 *err = acquire_in_progress ? -EAGAIN : error;
891 spin_unlock_bh(&xfrm_state_lock);
David S. Miller37b08e32008-09-02 20:14:15 -0700892 if (to_put)
893 xfrm_state_put(to_put);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894 return x;
895}
896
Jamal Hadi Salim628529b2007-07-02 22:41:14 -0700897struct xfrm_state *
Jamal Hadi Salimbd557752010-02-22 16:20:22 -0800898xfrm_stateonly_find(struct net *net, u32 mark,
Alexey Dobriyan5447c5e2008-11-25 17:31:51 -0800899 xfrm_address_t *daddr, xfrm_address_t *saddr,
Jamal Hadi Salim628529b2007-07-02 22:41:14 -0700900 unsigned short family, u8 mode, u8 proto, u32 reqid)
901{
Pavel Emelyanov4bda4f22007-12-14 11:38:04 -0800902 unsigned int h;
Jamal Hadi Salim628529b2007-07-02 22:41:14 -0700903 struct xfrm_state *rx = NULL, *x = NULL;
904 struct hlist_node *entry;
905
906 spin_lock(&xfrm_state_lock);
Alexey Dobriyan5447c5e2008-11-25 17:31:51 -0800907 h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
908 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
Jamal Hadi Salim628529b2007-07-02 22:41:14 -0700909 if (x->props.family == family &&
910 x->props.reqid == reqid &&
Jamal Hadi Salim3d6acfa2010-02-22 11:32:56 +0000911 (mark & x->mark.m) == x->mark.v &&
Jamal Hadi Salim628529b2007-07-02 22:41:14 -0700912 !(x->props.flags & XFRM_STATE_WILDRECV) &&
913 xfrm_state_addr_check(x, daddr, saddr, family) &&
914 mode == x->props.mode &&
915 proto == x->id.proto &&
916 x->km.state == XFRM_STATE_VALID) {
917 rx = x;
918 break;
919 }
920 }
921
922 if (rx)
923 xfrm_state_hold(rx);
924 spin_unlock(&xfrm_state_lock);
925
926
927 return rx;
928}
929EXPORT_SYMBOL(xfrm_stateonly_find);
930
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931static void __xfrm_state_insert(struct xfrm_state *x)
932{
Alexey Dobriyan98806f72008-11-25 17:29:47 -0800933 struct net *net = xs_net(x);
David S. Millera624c102006-08-24 03:24:33 -0700934 unsigned int h;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935
Alexey Dobriyan98806f72008-11-25 17:29:47 -0800936 list_add(&x->km.all, &net->xfrm.state_all);
Timo Teras4c563f72008-02-28 21:31:08 -0800937
Alexey Dobriyan98806f72008-11-25 17:29:47 -0800938 h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr,
David S. Millerc1969f22006-08-24 04:00:03 -0700939 x->props.reqid, x->props.family);
Alexey Dobriyan98806f72008-11-25 17:29:47 -0800940 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941
Alexey Dobriyan98806f72008-11-25 17:29:47 -0800942 h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family);
943 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944
Masahide NAKAMURA7b4dc3602006-09-27 22:21:52 -0700945 if (x->id.spi) {
Alexey Dobriyan98806f72008-11-25 17:29:47 -0800946 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto,
Masahide NAKAMURA6c44e6b2006-08-23 17:53:57 -0700947 x->props.family);
948
Alexey Dobriyan98806f72008-11-25 17:29:47 -0800949 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
Masahide NAKAMURA6c44e6b2006-08-23 17:53:57 -0700950 }
951
Yury Polyanskiy9e0d57f2009-11-08 20:58:41 -0800952 tasklet_hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL);
David S. Millera47f0ce2006-08-24 03:54:22 -0700953 if (x->replay_maxage)
954 mod_timer(&x->rtimer, jiffies + x->replay_maxage);
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -0800955
Alexey Dobriyan98806f72008-11-25 17:29:47 -0800956 wake_up(&net->xfrm.km_waitq);
David S. Millerf034b5d2006-08-24 03:08:07 -0700957
Alexey Dobriyan98806f72008-11-25 17:29:47 -0800958 net->xfrm.state_num++;
David S. Millerf034b5d2006-08-24 03:08:07 -0700959
Alexey Dobriyan98806f72008-11-25 17:29:47 -0800960 xfrm_hash_grow_check(net, x->bydst.next != NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961}
962
David S. Millerc7f5ea32006-08-24 03:29:04 -0700963/* xfrm_state_lock is held */
964static void __xfrm_state_bump_genids(struct xfrm_state *xnew)
965{
Alexey Dobriyan98806f72008-11-25 17:29:47 -0800966 struct net *net = xs_net(xnew);
David S. Millerc7f5ea32006-08-24 03:29:04 -0700967 unsigned short family = xnew->props.family;
968 u32 reqid = xnew->props.reqid;
969 struct xfrm_state *x;
970 struct hlist_node *entry;
971 unsigned int h;
Jamal Hadi Salim3d6acfa2010-02-22 11:32:56 +0000972 u32 mark = xnew->mark.v & xnew->mark.m;
David S. Millerc7f5ea32006-08-24 03:29:04 -0700973
Alexey Dobriyan98806f72008-11-25 17:29:47 -0800974 h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family);
975 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
David S. Millerc7f5ea32006-08-24 03:29:04 -0700976 if (x->props.family == family &&
977 x->props.reqid == reqid &&
Jamal Hadi Salim3d6acfa2010-02-22 11:32:56 +0000978 (mark & x->mark.m) == x->mark.v &&
David S. Millerc1969f22006-08-24 04:00:03 -0700979 !xfrm_addr_cmp(&x->id.daddr, &xnew->id.daddr, family) &&
980 !xfrm_addr_cmp(&x->props.saddr, &xnew->props.saddr, family))
Herbert Xu34996cb2010-03-31 01:19:49 +0000981 x->genid++;
David S. Millerc7f5ea32006-08-24 03:29:04 -0700982 }
983}
984
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985void xfrm_state_insert(struct xfrm_state *x)
986{
987 spin_lock_bh(&xfrm_state_lock);
David S. Millerc7f5ea32006-08-24 03:29:04 -0700988 __xfrm_state_bump_genids(x);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989 __xfrm_state_insert(x);
990 spin_unlock_bh(&xfrm_state_lock);
991}
992EXPORT_SYMBOL(xfrm_state_insert);
993
David S. Miller27708342006-08-24 00:13:10 -0700994/* xfrm_state_lock is held */
David S. Millera70486f2011-02-27 23:17:24 -0800995static struct xfrm_state *__find_acq_core(struct net *net, struct xfrm_mark *m,
996 unsigned short family, u8 mode,
997 u32 reqid, u8 proto,
998 const xfrm_address_t *daddr,
999 const xfrm_address_t *saddr, int create)
David S. Miller27708342006-08-24 00:13:10 -07001000{
Alexey Dobriyan5447c5e2008-11-25 17:31:51 -08001001 unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
David S. Miller8f126e32006-08-24 02:45:07 -07001002 struct hlist_node *entry;
David S. Miller27708342006-08-24 00:13:10 -07001003 struct xfrm_state *x;
Jamal Hadi Salim3d6acfa2010-02-22 11:32:56 +00001004 u32 mark = m->v & m->m;
David S. Miller27708342006-08-24 00:13:10 -07001005
Alexey Dobriyan5447c5e2008-11-25 17:31:51 -08001006 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
David S. Miller27708342006-08-24 00:13:10 -07001007 if (x->props.reqid != reqid ||
1008 x->props.mode != mode ||
1009 x->props.family != family ||
1010 x->km.state != XFRM_STATE_ACQ ||
Joy Latten75e252d2007-03-12 17:14:07 -07001011 x->id.spi != 0 ||
Wei Yongjun18025712009-06-28 18:42:53 +00001012 x->id.proto != proto ||
Jamal Hadi Salim3d6acfa2010-02-22 11:32:56 +00001013 (mark & x->mark.m) != x->mark.v ||
Wei Yongjun18025712009-06-28 18:42:53 +00001014 xfrm_addr_cmp(&x->id.daddr, daddr, family) ||
1015 xfrm_addr_cmp(&x->props.saddr, saddr, family))
David S. Miller27708342006-08-24 00:13:10 -07001016 continue;
1017
David S. Miller27708342006-08-24 00:13:10 -07001018 xfrm_state_hold(x);
1019 return x;
1020 }
1021
1022 if (!create)
1023 return NULL;
1024
Alexey Dobriyan5447c5e2008-11-25 17:31:51 -08001025 x = xfrm_state_alloc(net);
David S. Miller27708342006-08-24 00:13:10 -07001026 if (likely(x)) {
1027 switch (family) {
1028 case AF_INET:
1029 x->sel.daddr.a4 = daddr->a4;
1030 x->sel.saddr.a4 = saddr->a4;
1031 x->sel.prefixlen_d = 32;
1032 x->sel.prefixlen_s = 32;
1033 x->props.saddr.a4 = saddr->a4;
1034 x->id.daddr.a4 = daddr->a4;
1035 break;
1036
1037 case AF_INET6:
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +00001038 *(struct in6_addr *)x->sel.daddr.a6 = *(struct in6_addr *)daddr;
1039 *(struct in6_addr *)x->sel.saddr.a6 = *(struct in6_addr *)saddr;
David S. Miller27708342006-08-24 00:13:10 -07001040 x->sel.prefixlen_d = 128;
1041 x->sel.prefixlen_s = 128;
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +00001042 *(struct in6_addr *)x->props.saddr.a6 = *(struct in6_addr *)saddr;
1043 *(struct in6_addr *)x->id.daddr.a6 = *(struct in6_addr *)daddr;
David S. Miller27708342006-08-24 00:13:10 -07001044 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001045 }
David S. Miller27708342006-08-24 00:13:10 -07001046
1047 x->km.state = XFRM_STATE_ACQ;
1048 x->id.proto = proto;
1049 x->props.family = family;
1050 x->props.mode = mode;
1051 x->props.reqid = reqid;
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001052 x->mark.v = m->v;
1053 x->mark.m = m->m;
Alexey Dobriyanb27aead2008-11-25 18:00:48 -08001054 x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
David S. Miller27708342006-08-24 00:13:10 -07001055 xfrm_state_hold(x);
Yury Polyanskiy9e0d57f2009-11-08 20:58:41 -08001056 tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL);
Alexey Dobriyan5447c5e2008-11-25 17:31:51 -08001057 list_add(&x->km.all, &net->xfrm.state_all);
1058 hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
1059 h = xfrm_src_hash(net, daddr, saddr, family);
1060 hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
David S. Miller918049f2006-10-12 22:03:24 -07001061
Alexey Dobriyan5447c5e2008-11-25 17:31:51 -08001062 net->xfrm.state_num++;
David S. Miller918049f2006-10-12 22:03:24 -07001063
Alexey Dobriyan5447c5e2008-11-25 17:31:51 -08001064 xfrm_hash_grow_check(net, x->bydst.next != NULL);
David S. Miller27708342006-08-24 00:13:10 -07001065 }
1066
1067 return x;
1068}
1069
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001070static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071
1072int xfrm_state_add(struct xfrm_state *x)
1073{
Alexey Dobriyan5447c5e2008-11-25 17:31:51 -08001074 struct net *net = xs_net(x);
David S. Miller37b08e32008-09-02 20:14:15 -07001075 struct xfrm_state *x1, *to_put;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076 int family;
1077 int err;
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001078 u32 mark = x->mark.v & x->mark.m;
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -07001079 int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080
1081 family = x->props.family;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082
David S. Miller37b08e32008-09-02 20:14:15 -07001083 to_put = NULL;
1084
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085 spin_lock_bh(&xfrm_state_lock);
1086
David S. Milleredcd5822006-08-24 00:42:45 -07001087 x1 = __xfrm_state_locate(x, use_spi, family);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088 if (x1) {
David S. Miller37b08e32008-09-02 20:14:15 -07001089 to_put = x1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090 x1 = NULL;
1091 err = -EEXIST;
1092 goto out;
1093 }
1094
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -07001095 if (use_spi && x->km.seq) {
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001096 x1 = __xfrm_find_acq_byseq(net, mark, x->km.seq);
Joy Latten75e252d2007-03-12 17:14:07 -07001097 if (x1 && ((x1->id.proto != x->id.proto) ||
1098 xfrm_addr_cmp(&x1->id.daddr, &x->id.daddr, family))) {
David S. Miller37b08e32008-09-02 20:14:15 -07001099 to_put = x1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100 x1 = NULL;
1101 }
1102 }
1103
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -07001104 if (use_spi && !x1)
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001105 x1 = __find_acq_core(net, &x->mark, family, x->props.mode,
1106 x->props.reqid, x->id.proto,
David S. Miller27708342006-08-24 00:13:10 -07001107 &x->id.daddr, &x->props.saddr, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108
David S. Millerc7f5ea32006-08-24 03:29:04 -07001109 __xfrm_state_bump_genids(x);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110 __xfrm_state_insert(x);
1111 err = 0;
1112
1113out:
1114 spin_unlock_bh(&xfrm_state_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001115
1116 if (x1) {
1117 xfrm_state_delete(x1);
1118 xfrm_state_put(x1);
1119 }
1120
David S. Miller37b08e32008-09-02 20:14:15 -07001121 if (to_put)
1122 xfrm_state_put(to_put);
1123
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124 return err;
1125}
1126EXPORT_SYMBOL(xfrm_state_add);
1127
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001128#ifdef CONFIG_XFRM_MIGRATE
Eric Dumazet66663512008-01-08 01:35:52 -08001129static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, int *errp)
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001130{
Alexey Dobriyan98806f72008-11-25 17:29:47 -08001131 struct net *net = xs_net(orig);
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001132 int err = -ENOMEM;
Alexey Dobriyan98806f72008-11-25 17:29:47 -08001133 struct xfrm_state *x = xfrm_state_alloc(net);
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001134 if (!x)
Herbert Xu553f9112010-02-15 20:00:51 +00001135 goto out;
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001136
1137 memcpy(&x->id, &orig->id, sizeof(x->id));
1138 memcpy(&x->sel, &orig->sel, sizeof(x->sel));
1139 memcpy(&x->lft, &orig->lft, sizeof(x->lft));
1140 x->props.mode = orig->props.mode;
1141 x->props.replay_window = orig->props.replay_window;
1142 x->props.reqid = orig->props.reqid;
1143 x->props.family = orig->props.family;
1144 x->props.saddr = orig->props.saddr;
1145
1146 if (orig->aalg) {
Martin Willi4447bb32009-11-25 00:29:52 +00001147 x->aalg = xfrm_algo_auth_clone(orig->aalg);
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001148 if (!x->aalg)
1149 goto error;
1150 }
1151 x->props.aalgo = orig->props.aalgo;
1152
1153 if (orig->ealg) {
1154 x->ealg = xfrm_algo_clone(orig->ealg);
1155 if (!x->ealg)
1156 goto error;
1157 }
1158 x->props.ealgo = orig->props.ealgo;
1159
1160 if (orig->calg) {
1161 x->calg = xfrm_algo_clone(orig->calg);
1162 if (!x->calg)
1163 goto error;
1164 }
1165 x->props.calgo = orig->props.calgo;
1166
YOSHIFUJI Hideakia716c112007-02-09 23:25:29 +09001167 if (orig->encap) {
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001168 x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL);
1169 if (!x->encap)
1170 goto error;
1171 }
1172
1173 if (orig->coaddr) {
1174 x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr),
1175 GFP_KERNEL);
1176 if (!x->coaddr)
1177 goto error;
1178 }
1179
Steffen Klassertaf2f4642011-03-28 19:46:39 +00001180 if (orig->replay_esn) {
1181 err = xfrm_replay_clone(x, orig);
1182 if (err)
1183 goto error;
1184 }
1185
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001186 memcpy(&x->mark, &orig->mark, sizeof(x->mark));
1187
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001188 err = xfrm_init_state(x);
1189 if (err)
1190 goto error;
1191
1192 x->props.flags = orig->props.flags;
1193
1194 x->curlft.add_time = orig->curlft.add_time;
1195 x->km.state = orig->km.state;
1196 x->km.seq = orig->km.seq;
1197
1198 return x;
1199
1200 error:
Herbert Xu553f9112010-02-15 20:00:51 +00001201 xfrm_state_put(x);
1202out:
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001203 if (errp)
1204 *errp = err;
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001205 return NULL;
1206}
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001207
1208/* xfrm_state_lock is held */
1209struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m)
1210{
1211 unsigned int h;
1212 struct xfrm_state *x;
1213 struct hlist_node *entry;
1214
1215 if (m->reqid) {
Alexey Dobriyan64d0cd02008-11-25 17:29:21 -08001216 h = xfrm_dst_hash(&init_net, &m->old_daddr, &m->old_saddr,
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001217 m->reqid, m->old_family);
Alexey Dobriyan73d189d2008-11-25 17:16:58 -08001218 hlist_for_each_entry(x, entry, init_net.xfrm.state_bydst+h, bydst) {
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001219 if (x->props.mode != m->mode ||
1220 x->id.proto != m->proto)
1221 continue;
1222 if (m->reqid && x->props.reqid != m->reqid)
1223 continue;
1224 if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr,
1225 m->old_family) ||
1226 xfrm_addr_cmp(&x->props.saddr, &m->old_saddr,
1227 m->old_family))
1228 continue;
1229 xfrm_state_hold(x);
1230 return x;
1231 }
1232 } else {
Alexey Dobriyan64d0cd02008-11-25 17:29:21 -08001233 h = xfrm_src_hash(&init_net, &m->old_daddr, &m->old_saddr,
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001234 m->old_family);
Alexey Dobriyand320bbb2008-11-25 17:17:24 -08001235 hlist_for_each_entry(x, entry, init_net.xfrm.state_bysrc+h, bysrc) {
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001236 if (x->props.mode != m->mode ||
1237 x->id.proto != m->proto)
1238 continue;
1239 if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr,
1240 m->old_family) ||
1241 xfrm_addr_cmp(&x->props.saddr, &m->old_saddr,
1242 m->old_family))
1243 continue;
1244 xfrm_state_hold(x);
1245 return x;
1246 }
1247 }
1248
YOSHIFUJI Hideakia716c112007-02-09 23:25:29 +09001249 return NULL;
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001250}
1251EXPORT_SYMBOL(xfrm_migrate_state_find);
1252
1253struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x,
1254 struct xfrm_migrate *m)
1255{
1256 struct xfrm_state *xc;
1257 int err;
1258
1259 xc = xfrm_state_clone(x, &err);
1260 if (!xc)
1261 return NULL;
1262
1263 memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr));
1264 memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr));
1265
1266 /* add state */
1267 if (!xfrm_addr_cmp(&x->id.daddr, &m->new_daddr, m->new_family)) {
1268 /* a care is needed when the destination address of the
1269 state is to be updated as it is a part of triplet */
1270 xfrm_state_insert(xc);
1271 } else {
1272 if ((err = xfrm_state_add(xc)) < 0)
1273 goto error;
1274 }
1275
1276 return xc;
1277error:
Thomas Egerer78347c82010-12-06 23:28:56 +00001278 xfrm_state_put(xc);
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001279 return NULL;
1280}
1281EXPORT_SYMBOL(xfrm_state_migrate);
1282#endif
1283
Linus Torvalds1da177e2005-04-16 15:20:36 -07001284int xfrm_state_update(struct xfrm_state *x)
1285{
David S. Miller37b08e32008-09-02 20:14:15 -07001286 struct xfrm_state *x1, *to_put;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001287 int err;
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -07001288 int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001289
David S. Miller37b08e32008-09-02 20:14:15 -07001290 to_put = NULL;
1291
Linus Torvalds1da177e2005-04-16 15:20:36 -07001292 spin_lock_bh(&xfrm_state_lock);
David S. Milleredcd5822006-08-24 00:42:45 -07001293 x1 = __xfrm_state_locate(x, use_spi, x->props.family);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294
1295 err = -ESRCH;
1296 if (!x1)
1297 goto out;
1298
1299 if (xfrm_state_kern(x1)) {
David S. Miller37b08e32008-09-02 20:14:15 -07001300 to_put = x1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301 err = -EEXIST;
1302 goto out;
1303 }
1304
1305 if (x1->km.state == XFRM_STATE_ACQ) {
1306 __xfrm_state_insert(x);
1307 x = NULL;
1308 }
1309 err = 0;
1310
1311out:
1312 spin_unlock_bh(&xfrm_state_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313
David S. Miller37b08e32008-09-02 20:14:15 -07001314 if (to_put)
1315 xfrm_state_put(to_put);
1316
Linus Torvalds1da177e2005-04-16 15:20:36 -07001317 if (err)
1318 return err;
1319
1320 if (!x) {
1321 xfrm_state_delete(x1);
1322 xfrm_state_put(x1);
1323 return 0;
1324 }
1325
1326 err = -EINVAL;
1327 spin_lock_bh(&x1->lock);
1328 if (likely(x1->km.state == XFRM_STATE_VALID)) {
1329 if (x->encap && x1->encap)
1330 memcpy(x1->encap, x->encap, sizeof(*x1->encap));
Noriaki TAKAMIYA060f02a2006-08-23 18:18:55 -07001331 if (x->coaddr && x1->coaddr) {
1332 memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr));
1333 }
1334 if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel)))
1335 memcpy(&x1->sel, &x->sel, sizeof(x1->sel));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001336 memcpy(&x1->lft, &x->lft, sizeof(x1->lft));
1337 x1->km.dying = 0;
1338
Yury Polyanskiy9e0d57f2009-11-08 20:58:41 -08001339 tasklet_hrtimer_start(&x1->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001340 if (x1->curlft.use_time)
1341 xfrm_state_check_expire(x1);
1342
1343 err = 0;
Tushar Gohad8fcbc632011-07-07 15:38:52 +00001344 x->km.state = XFRM_STATE_DEAD;
1345 __xfrm_state_put(x);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001346 }
1347 spin_unlock_bh(&x1->lock);
1348
1349 xfrm_state_put(x1);
1350
1351 return err;
1352}
1353EXPORT_SYMBOL(xfrm_state_update);
1354
1355int xfrm_state_check_expire(struct xfrm_state *x)
1356{
1357 if (!x->curlft.use_time)
James Morris9d729f72007-03-04 16:12:44 -08001358 x->curlft.use_time = get_seconds();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001359
1360 if (x->km.state != XFRM_STATE_VALID)
1361 return -EINVAL;
1362
1363 if (x->curlft.bytes >= x->lft.hard_byte_limit ||
1364 x->curlft.packets >= x->lft.hard_packet_limit) {
Herbert Xu4666faa2005-06-18 22:43:22 -07001365 x->km.state = XFRM_STATE_EXPIRED;
Yury Polyanskiy9e0d57f2009-11-08 20:58:41 -08001366 tasklet_hrtimer_start(&x->mtimer, ktime_set(0,0), HRTIMER_MODE_REL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001367 return -EINVAL;
1368 }
1369
1370 if (!x->km.dying &&
1371 (x->curlft.bytes >= x->lft.soft_byte_limit ||
Herbert Xu4666faa2005-06-18 22:43:22 -07001372 x->curlft.packets >= x->lft.soft_packet_limit)) {
1373 x->km.dying = 1;
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08001374 km_state_expired(x, 0, 0);
Herbert Xu4666faa2005-06-18 22:43:22 -07001375 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001376 return 0;
1377}
1378EXPORT_SYMBOL(xfrm_state_check_expire);
1379
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380struct xfrm_state *
David S. Millera70486f2011-02-27 23:17:24 -08001381xfrm_state_lookup(struct net *net, u32 mark, const xfrm_address_t *daddr, __be32 spi,
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001382 u8 proto, unsigned short family)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001383{
1384 struct xfrm_state *x;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385
1386 spin_lock_bh(&xfrm_state_lock);
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001387 x = __xfrm_state_lookup(net, mark, daddr, spi, proto, family);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001388 spin_unlock_bh(&xfrm_state_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001389 return x;
1390}
1391EXPORT_SYMBOL(xfrm_state_lookup);
1392
1393struct xfrm_state *
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001394xfrm_state_lookup_byaddr(struct net *net, u32 mark,
David S. Millera70486f2011-02-27 23:17:24 -08001395 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -07001396 u8 proto, unsigned short family)
1397{
1398 struct xfrm_state *x;
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -07001399
1400 spin_lock_bh(&xfrm_state_lock);
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001401 x = __xfrm_state_lookup_byaddr(net, mark, daddr, saddr, proto, family);
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -07001402 spin_unlock_bh(&xfrm_state_lock);
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -07001403 return x;
1404}
1405EXPORT_SYMBOL(xfrm_state_lookup_byaddr);
1406
1407struct xfrm_state *
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001408xfrm_find_acq(struct net *net, struct xfrm_mark *mark, u8 mode, u32 reqid, u8 proto,
David S. Millera70486f2011-02-27 23:17:24 -08001409 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410 int create, unsigned short family)
1411{
1412 struct xfrm_state *x;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413
1414 spin_lock_bh(&xfrm_state_lock);
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001415 x = __find_acq_core(net, mark, family, mode, reqid, proto, daddr, saddr, create);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001416 spin_unlock_bh(&xfrm_state_lock);
David S. Miller27708342006-08-24 00:13:10 -07001417
Linus Torvalds1da177e2005-04-16 15:20:36 -07001418 return x;
1419}
1420EXPORT_SYMBOL(xfrm_find_acq);
1421
Masahide NAKAMURA41a49cc2006-08-23 22:48:31 -07001422#ifdef CONFIG_XFRM_SUB_POLICY
1423int
1424xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1425 unsigned short family)
1426{
1427 int err = 0;
1428 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
1429 if (!afinfo)
1430 return -EAFNOSUPPORT;
1431
1432 spin_lock_bh(&xfrm_state_lock);
1433 if (afinfo->tmpl_sort)
1434 err = afinfo->tmpl_sort(dst, src, n);
1435 spin_unlock_bh(&xfrm_state_lock);
1436 xfrm_state_put_afinfo(afinfo);
1437 return err;
1438}
1439EXPORT_SYMBOL(xfrm_tmpl_sort);
1440
1441int
1442xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1443 unsigned short family)
1444{
1445 int err = 0;
1446 struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
1447 if (!afinfo)
1448 return -EAFNOSUPPORT;
1449
1450 spin_lock_bh(&xfrm_state_lock);
1451 if (afinfo->state_sort)
1452 err = afinfo->state_sort(dst, src, n);
1453 spin_unlock_bh(&xfrm_state_lock);
1454 xfrm_state_put_afinfo(afinfo);
1455 return err;
1456}
1457EXPORT_SYMBOL(xfrm_state_sort);
1458#endif
1459
Linus Torvalds1da177e2005-04-16 15:20:36 -07001460/* Silly enough, but I'm lazy to build resolution list */
1461
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001462static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001463{
1464 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001465
Alexey Dobriyan5447c5e2008-11-25 17:31:51 -08001466 for (i = 0; i <= net->xfrm.state_hmask; i++) {
David S. Miller8f126e32006-08-24 02:45:07 -07001467 struct hlist_node *entry;
1468 struct xfrm_state *x;
1469
Alexey Dobriyan5447c5e2008-11-25 17:31:51 -08001470 hlist_for_each_entry(x, entry, net->xfrm.state_bydst+i, bydst) {
David S. Miller8f126e32006-08-24 02:45:07 -07001471 if (x->km.seq == seq &&
Jamal Hadi Salim3d6acfa2010-02-22 11:32:56 +00001472 (mark & x->mark.m) == x->mark.v &&
David S. Miller8f126e32006-08-24 02:45:07 -07001473 x->km.state == XFRM_STATE_ACQ) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001474 xfrm_state_hold(x);
1475 return x;
1476 }
1477 }
1478 }
1479 return NULL;
1480}
1481
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001482struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001483{
1484 struct xfrm_state *x;
1485
1486 spin_lock_bh(&xfrm_state_lock);
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001487 x = __xfrm_find_acq_byseq(net, mark, seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001488 spin_unlock_bh(&xfrm_state_lock);
1489 return x;
1490}
1491EXPORT_SYMBOL(xfrm_find_acq_byseq);
1492
1493u32 xfrm_get_acqseq(void)
1494{
1495 u32 res;
jamal6836b9b2010-02-16 02:01:22 +00001496 static atomic_t acqseq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001497
jamal6836b9b2010-02-16 02:01:22 +00001498 do {
1499 res = atomic_inc_return(&acqseq);
1500 } while (!res);
1501
Linus Torvalds1da177e2005-04-16 15:20:36 -07001502 return res;
1503}
1504EXPORT_SYMBOL(xfrm_get_acqseq);
1505
Herbert Xu658b2192007-10-09 13:29:52 -07001506int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001507{
Alexey Dobriyan221df1e2008-11-25 17:30:50 -08001508 struct net *net = xs_net(x);
David S. Millerf034b5d2006-08-24 03:08:07 -07001509 unsigned int h;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001510 struct xfrm_state *x0;
Herbert Xu658b2192007-10-09 13:29:52 -07001511 int err = -ENOENT;
1512 __be32 minspi = htonl(low);
1513 __be32 maxspi = htonl(high);
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001514 u32 mark = x->mark.v & x->mark.m;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001515
Herbert Xu658b2192007-10-09 13:29:52 -07001516 spin_lock_bh(&x->lock);
1517 if (x->km.state == XFRM_STATE_DEAD)
1518 goto unlock;
1519
1520 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001521 if (x->id.spi)
Herbert Xu658b2192007-10-09 13:29:52 -07001522 goto unlock;
1523
1524 err = -ENOENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001525
1526 if (minspi == maxspi) {
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001527 x0 = xfrm_state_lookup(net, mark, &x->id.daddr, minspi, x->id.proto, x->props.family);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001528 if (x0) {
1529 xfrm_state_put(x0);
Herbert Xu658b2192007-10-09 13:29:52 -07001530 goto unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001531 }
1532 x->id.spi = minspi;
1533 } else {
1534 u32 spi = 0;
Al Viro26977b42006-09-27 18:47:05 -07001535 for (h=0; h<high-low+1; h++) {
1536 spi = low + net_random()%(high-low+1);
Jamal Hadi Salimbd557752010-02-22 16:20:22 -08001537 x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001538 if (x0 == NULL) {
1539 x->id.spi = htonl(spi);
1540 break;
1541 }
1542 xfrm_state_put(x0);
1543 }
1544 }
1545 if (x->id.spi) {
1546 spin_lock_bh(&xfrm_state_lock);
Alexey Dobriyan12604d82008-11-25 17:31:18 -08001547 h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family);
1548 hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001549 spin_unlock_bh(&xfrm_state_lock);
Herbert Xu658b2192007-10-09 13:29:52 -07001550
1551 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001552 }
Herbert Xu658b2192007-10-09 13:29:52 -07001553
1554unlock:
1555 spin_unlock_bh(&x->lock);
1556
1557 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001558}
1559EXPORT_SYMBOL(xfrm_alloc_spi);
1560
Alexey Dobriyan284fa7d2008-11-25 17:32:14 -08001561int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
Timo Teras4c563f72008-02-28 21:31:08 -08001562 int (*func)(struct xfrm_state *, int, void*),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001563 void *data)
1564{
Herbert Xu12a169e2008-10-01 07:03:24 -07001565 struct xfrm_state *state;
1566 struct xfrm_state_walk *x;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001567 int err = 0;
1568
Herbert Xu12a169e2008-10-01 07:03:24 -07001569 if (walk->seq != 0 && list_empty(&walk->all))
Timo Teras4c563f72008-02-28 21:31:08 -08001570 return 0;
1571
Linus Torvalds1da177e2005-04-16 15:20:36 -07001572 spin_lock_bh(&xfrm_state_lock);
Herbert Xu12a169e2008-10-01 07:03:24 -07001573 if (list_empty(&walk->all))
Alexey Dobriyan284fa7d2008-11-25 17:32:14 -08001574 x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all);
Herbert Xu12a169e2008-10-01 07:03:24 -07001575 else
1576 x = list_entry(&walk->all, struct xfrm_state_walk, all);
Alexey Dobriyan284fa7d2008-11-25 17:32:14 -08001577 list_for_each_entry_from(x, &net->xfrm.state_all, all) {
Herbert Xu12a169e2008-10-01 07:03:24 -07001578 if (x->state == XFRM_STATE_DEAD)
Timo Teras4c563f72008-02-28 21:31:08 -08001579 continue;
Herbert Xu12a169e2008-10-01 07:03:24 -07001580 state = container_of(x, struct xfrm_state, km);
1581 if (!xfrm_id_proto_match(state->id.proto, walk->proto))
Timo Teras4c563f72008-02-28 21:31:08 -08001582 continue;
Herbert Xu12a169e2008-10-01 07:03:24 -07001583 err = func(state, walk->seq, data);
1584 if (err) {
1585 list_move_tail(&walk->all, &x->all);
1586 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001587 }
Herbert Xu12a169e2008-10-01 07:03:24 -07001588 walk->seq++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001589 }
Herbert Xu12a169e2008-10-01 07:03:24 -07001590 if (walk->seq == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001591 err = -ENOENT;
1592 goto out;
1593 }
Herbert Xu12a169e2008-10-01 07:03:24 -07001594 list_del_init(&walk->all);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001595out:
1596 spin_unlock_bh(&xfrm_state_lock);
1597 return err;
1598}
1599EXPORT_SYMBOL(xfrm_state_walk);
1600
Herbert Xu5c182452008-09-22 19:48:19 -07001601void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto)
1602{
Herbert Xu12a169e2008-10-01 07:03:24 -07001603 INIT_LIST_HEAD(&walk->all);
Herbert Xu5c182452008-09-22 19:48:19 -07001604 walk->proto = proto;
Herbert Xu12a169e2008-10-01 07:03:24 -07001605 walk->state = XFRM_STATE_DEAD;
1606 walk->seq = 0;
Herbert Xu5c182452008-09-22 19:48:19 -07001607}
1608EXPORT_SYMBOL(xfrm_state_walk_init);
1609
Herbert Xuabb81c42008-09-09 19:58:29 -07001610void xfrm_state_walk_done(struct xfrm_state_walk *walk)
1611{
Herbert Xu12a169e2008-10-01 07:03:24 -07001612 if (list_empty(&walk->all))
Herbert Xu5c182452008-09-22 19:48:19 -07001613 return;
Herbert Xu5c182452008-09-22 19:48:19 -07001614
Herbert Xu12a169e2008-10-01 07:03:24 -07001615 spin_lock_bh(&xfrm_state_lock);
1616 list_del(&walk->all);
Chuck Ebbert7d0b5912009-03-27 00:22:01 -07001617 spin_unlock_bh(&xfrm_state_lock);
Herbert Xuabb81c42008-09-09 19:58:29 -07001618}
1619EXPORT_SYMBOL(xfrm_state_walk_done);
1620
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -08001621static void xfrm_replay_timer_handler(unsigned long data)
1622{
1623 struct xfrm_state *x = (struct xfrm_state*)data;
1624
1625 spin_lock(&x->lock);
1626
Jamal Hadi Salim27170962006-04-14 15:03:05 -07001627 if (x->km.state == XFRM_STATE_VALID) {
Alexey Dobriyana6483b72008-11-25 17:38:20 -08001628 if (xfrm_aevent_is_on(xs_net(x)))
Steffen Klassert9fdc4882011-03-08 00:08:32 +00001629 x->repl->notify(x, XFRM_REPLAY_TIMEOUT);
Jamal Hadi Salim27170962006-04-14 15:03:05 -07001630 else
1631 x->xflags |= XFRM_TIME_DEFER;
1632 }
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -08001633
1634 spin_unlock(&x->lock);
1635}
1636
Denis Chengdf018122007-12-07 00:51:11 -08001637static LIST_HEAD(xfrm_km_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001638static DEFINE_RWLOCK(xfrm_km_lock);
1639
David S. Miller214e0052011-02-24 00:02:38 -05001640void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001641{
1642 struct xfrm_mgr *km;
1643
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001644 read_lock(&xfrm_km_lock);
1645 list_for_each_entry(km, &xfrm_km_list, list)
1646 if (km->notify_policy)
1647 km->notify_policy(xp, dir, c);
1648 read_unlock(&xfrm_km_lock);
1649}
1650
David S. Miller214e0052011-02-24 00:02:38 -05001651void km_state_notify(struct xfrm_state *x, const struct km_event *c)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001652{
1653 struct xfrm_mgr *km;
1654 read_lock(&xfrm_km_lock);
1655 list_for_each_entry(km, &xfrm_km_list, list)
1656 if (km->notify)
1657 km->notify(x, c);
1658 read_unlock(&xfrm_km_lock);
1659}
1660
1661EXPORT_SYMBOL(km_policy_notify);
1662EXPORT_SYMBOL(km_state_notify);
1663
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08001664void km_state_expired(struct xfrm_state *x, int hard, u32 pid)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001665{
Alexey Dobriyan98806f72008-11-25 17:29:47 -08001666 struct net *net = xs_net(x);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001667 struct km_event c;
1668
Herbert Xubf088672005-06-18 22:44:00 -07001669 c.data.hard = hard;
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08001670 c.pid = pid;
Herbert Xuf60f6b82005-06-18 22:44:37 -07001671 c.event = XFRM_MSG_EXPIRE;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001672 km_state_notify(x, &c);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001673
1674 if (hard)
Alexey Dobriyan98806f72008-11-25 17:29:47 -08001675 wake_up(&net->xfrm.km_waitq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001676}
1677
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08001678EXPORT_SYMBOL(km_state_expired);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001679/*
1680 * We send to all registered managers regardless of failure
1681 * We are happy with one success
1682*/
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08001683int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001684{
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001685 int err = -EINVAL, acqret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001686 struct xfrm_mgr *km;
1687
1688 read_lock(&xfrm_km_lock);
1689 list_for_each_entry(km, &xfrm_km_list, list) {
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001690 acqret = km->acquire(x, t, pol, XFRM_POLICY_OUT);
1691 if (!acqret)
1692 err = acqret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001693 }
1694 read_unlock(&xfrm_km_lock);
1695 return err;
1696}
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08001697EXPORT_SYMBOL(km_query);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001698
Al Viro5d36b182006-11-08 00:24:06 -08001699int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001700{
1701 int err = -EINVAL;
1702 struct xfrm_mgr *km;
1703
1704 read_lock(&xfrm_km_lock);
1705 list_for_each_entry(km, &xfrm_km_list, list) {
1706 if (km->new_mapping)
1707 err = km->new_mapping(x, ipaddr, sport);
1708 if (!err)
1709 break;
1710 }
1711 read_unlock(&xfrm_km_lock);
1712 return err;
1713}
1714EXPORT_SYMBOL(km_new_mapping);
1715
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001716void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001717{
Alexey Dobriyan98806f72008-11-25 17:29:47 -08001718 struct net *net = xp_net(pol);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001719 struct km_event c;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001720
Herbert Xubf088672005-06-18 22:44:00 -07001721 c.data.hard = hard;
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001722 c.pid = pid;
Herbert Xuf60f6b82005-06-18 22:44:37 -07001723 c.event = XFRM_MSG_POLEXPIRE;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001724 km_policy_notify(pol, dir, &c);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001725
1726 if (hard)
Alexey Dobriyan98806f72008-11-25 17:29:47 -08001727 wake_up(&net->xfrm.km_waitq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001728}
David S. Millera70fcb02006-03-20 19:18:52 -08001729EXPORT_SYMBOL(km_policy_expired);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001730
Eric Dumazet2d60abc2008-01-03 20:43:21 -08001731#ifdef CONFIG_XFRM_MIGRATE
David S. Miller183cad12011-02-24 00:28:01 -05001732int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1733 const struct xfrm_migrate *m, int num_migrate,
1734 const struct xfrm_kmaddress *k)
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001735{
1736 int err = -EINVAL;
1737 int ret;
1738 struct xfrm_mgr *km;
1739
1740 read_lock(&xfrm_km_lock);
1741 list_for_each_entry(km, &xfrm_km_list, list) {
1742 if (km->migrate) {
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07001743 ret = km->migrate(sel, dir, type, m, num_migrate, k);
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001744 if (!ret)
1745 err = ret;
1746 }
1747 }
1748 read_unlock(&xfrm_km_lock);
1749 return err;
1750}
1751EXPORT_SYMBOL(km_migrate);
Eric Dumazet2d60abc2008-01-03 20:43:21 -08001752#endif
Shinta Sugimoto80c9aba2007-02-08 13:11:42 -08001753
Alexey Dobriyandb983c12008-11-25 17:51:01 -08001754int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr)
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07001755{
1756 int err = -EINVAL;
1757 int ret;
1758 struct xfrm_mgr *km;
1759
1760 read_lock(&xfrm_km_lock);
1761 list_for_each_entry(km, &xfrm_km_list, list) {
1762 if (km->report) {
Alexey Dobriyandb983c12008-11-25 17:51:01 -08001763 ret = km->report(net, proto, sel, addr);
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07001764 if (!ret)
1765 err = ret;
1766 }
1767 }
1768 read_unlock(&xfrm_km_lock);
1769 return err;
1770}
1771EXPORT_SYMBOL(km_report);
1772
Linus Torvalds1da177e2005-04-16 15:20:36 -07001773int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1774{
1775 int err;
1776 u8 *data;
1777 struct xfrm_mgr *km;
1778 struct xfrm_policy *pol = NULL;
1779
1780 if (optlen <= 0 || optlen > PAGE_SIZE)
1781 return -EMSGSIZE;
1782
1783 data = kmalloc(optlen, GFP_KERNEL);
1784 if (!data)
1785 return -ENOMEM;
1786
1787 err = -EFAULT;
1788 if (copy_from_user(data, optval, optlen))
1789 goto out;
1790
1791 err = -EINVAL;
1792 read_lock(&xfrm_km_lock);
1793 list_for_each_entry(km, &xfrm_km_list, list) {
Venkat Yekkiralacb969f02006-07-24 23:32:20 -07001794 pol = km->compile_policy(sk, optname, data,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001795 optlen, &err);
1796 if (err >= 0)
1797 break;
1798 }
1799 read_unlock(&xfrm_km_lock);
1800
1801 if (err >= 0) {
1802 xfrm_sk_policy_insert(sk, err, pol);
1803 xfrm_pol_put(pol);
1804 err = 0;
1805 }
1806
1807out:
1808 kfree(data);
1809 return err;
1810}
1811EXPORT_SYMBOL(xfrm_user_policy);
1812
1813int xfrm_register_km(struct xfrm_mgr *km)
1814{
1815 write_lock_bh(&xfrm_km_lock);
1816 list_add_tail(&km->list, &xfrm_km_list);
1817 write_unlock_bh(&xfrm_km_lock);
1818 return 0;
1819}
1820EXPORT_SYMBOL(xfrm_register_km);
1821
1822int xfrm_unregister_km(struct xfrm_mgr *km)
1823{
1824 write_lock_bh(&xfrm_km_lock);
1825 list_del(&km->list);
1826 write_unlock_bh(&xfrm_km_lock);
1827 return 0;
1828}
1829EXPORT_SYMBOL(xfrm_unregister_km);
1830
1831int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo)
1832{
1833 int err = 0;
1834 if (unlikely(afinfo == NULL))
1835 return -EINVAL;
1836 if (unlikely(afinfo->family >= NPROTO))
1837 return -EAFNOSUPPORT;
Ingo Molnarf3111502006-04-28 15:30:03 -07001838 write_lock_bh(&xfrm_state_afinfo_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001839 if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL))
1840 err = -ENOBUFS;
David S. Milleredcd5822006-08-24 00:42:45 -07001841 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001842 xfrm_state_afinfo[afinfo->family] = afinfo;
Ingo Molnarf3111502006-04-28 15:30:03 -07001843 write_unlock_bh(&xfrm_state_afinfo_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001844 return err;
1845}
1846EXPORT_SYMBOL(xfrm_state_register_afinfo);
1847
1848int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo)
1849{
1850 int err = 0;
1851 if (unlikely(afinfo == NULL))
1852 return -EINVAL;
1853 if (unlikely(afinfo->family >= NPROTO))
1854 return -EAFNOSUPPORT;
Ingo Molnarf3111502006-04-28 15:30:03 -07001855 write_lock_bh(&xfrm_state_afinfo_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001856 if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) {
1857 if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo))
1858 err = -EINVAL;
David S. Milleredcd5822006-08-24 00:42:45 -07001859 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001860 xfrm_state_afinfo[afinfo->family] = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001861 }
Ingo Molnarf3111502006-04-28 15:30:03 -07001862 write_unlock_bh(&xfrm_state_afinfo_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001863 return err;
1864}
1865EXPORT_SYMBOL(xfrm_state_unregister_afinfo);
1866
Herbert Xu17c2a422007-10-17 21:33:12 -07001867static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001868{
1869 struct xfrm_state_afinfo *afinfo;
1870 if (unlikely(family >= NPROTO))
1871 return NULL;
1872 read_lock(&xfrm_state_afinfo_lock);
1873 afinfo = xfrm_state_afinfo[family];
Herbert Xu546be242006-05-27 23:03:58 -07001874 if (unlikely(!afinfo))
1875 read_unlock(&xfrm_state_afinfo_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001876 return afinfo;
1877}
1878
Herbert Xu17c2a422007-10-17 21:33:12 -07001879static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo)
Eric Dumazet9a429c42008-01-01 21:58:02 -08001880 __releases(xfrm_state_afinfo_lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001881{
Herbert Xu546be242006-05-27 23:03:58 -07001882 read_unlock(&xfrm_state_afinfo_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001883}
1884
1885/* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */
1886void xfrm_state_delete_tunnel(struct xfrm_state *x)
1887{
1888 if (x->tunnel) {
1889 struct xfrm_state *t = x->tunnel;
1890
1891 if (atomic_read(&t->tunnel_users) == 2)
1892 xfrm_state_delete(t);
1893 atomic_dec(&t->tunnel_users);
1894 xfrm_state_put(t);
1895 x->tunnel = NULL;
1896 }
1897}
1898EXPORT_SYMBOL(xfrm_state_delete_tunnel);
1899
1900int xfrm_state_mtu(struct xfrm_state *x, int mtu)
1901{
Patrick McHardyc5c25232007-04-09 11:47:18 -07001902 int res;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001903
Patrick McHardyc5c25232007-04-09 11:47:18 -07001904 spin_lock_bh(&x->lock);
1905 if (x->km.state == XFRM_STATE_VALID &&
1906 x->type && x->type->get_mtu)
1907 res = x->type->get_mtu(x, mtu);
1908 else
Patrick McHardy28121612007-06-18 22:30:15 -07001909 res = mtu - x->props.header_len;
Patrick McHardyc5c25232007-04-09 11:47:18 -07001910 spin_unlock_bh(&x->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001911 return res;
1912}
1913
Wei Yongjuna454f0c2011-03-21 18:08:28 -07001914int __xfrm_init_state(struct xfrm_state *x, bool init_replay)
Herbert Xu72cb6962005-06-20 13:18:08 -07001915{
Herbert Xud094cd82005-06-20 13:19:41 -07001916 struct xfrm_state_afinfo *afinfo;
Kazunori MIYAZAWAdf9dcb42008-03-24 14:51:51 -07001917 struct xfrm_mode *inner_mode;
Herbert Xud094cd82005-06-20 13:19:41 -07001918 int family = x->props.family;
Herbert Xu72cb6962005-06-20 13:18:08 -07001919 int err;
1920
Herbert Xud094cd82005-06-20 13:19:41 -07001921 err = -EAFNOSUPPORT;
1922 afinfo = xfrm_state_get_afinfo(family);
1923 if (!afinfo)
1924 goto error;
1925
1926 err = 0;
1927 if (afinfo->init_flags)
1928 err = afinfo->init_flags(x);
1929
1930 xfrm_state_put_afinfo(afinfo);
1931
1932 if (err)
1933 goto error;
1934
1935 err = -EPROTONOSUPPORT;
Herbert Xu13996372007-10-17 21:35:51 -07001936
Kazunori MIYAZAWAdf9dcb42008-03-24 14:51:51 -07001937 if (x->sel.family != AF_UNSPEC) {
1938 inner_mode = xfrm_get_mode(x->props.mode, x->sel.family);
1939 if (inner_mode == NULL)
1940 goto error;
1941
1942 if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) &&
1943 family != x->sel.family) {
1944 xfrm_put_mode(inner_mode);
1945 goto error;
1946 }
1947
1948 x->inner_mode = inner_mode;
1949 } else {
1950 struct xfrm_mode *inner_mode_iaf;
Martin Willid81d2282008-12-03 15:38:07 -08001951 int iafamily = AF_INET;
Kazunori MIYAZAWAdf9dcb42008-03-24 14:51:51 -07001952
Martin Willid81d2282008-12-03 15:38:07 -08001953 inner_mode = xfrm_get_mode(x->props.mode, x->props.family);
Kazunori MIYAZAWAdf9dcb42008-03-24 14:51:51 -07001954 if (inner_mode == NULL)
1955 goto error;
1956
1957 if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) {
1958 xfrm_put_mode(inner_mode);
1959 goto error;
1960 }
Martin Willid81d2282008-12-03 15:38:07 -08001961 x->inner_mode = inner_mode;
Kazunori MIYAZAWAdf9dcb42008-03-24 14:51:51 -07001962
Martin Willid81d2282008-12-03 15:38:07 -08001963 if (x->props.family == AF_INET)
1964 iafamily = AF_INET6;
Kazunori MIYAZAWAdf9dcb42008-03-24 14:51:51 -07001965
Martin Willid81d2282008-12-03 15:38:07 -08001966 inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily);
1967 if (inner_mode_iaf) {
1968 if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL)
1969 x->inner_mode_iaf = inner_mode_iaf;
1970 else
1971 xfrm_put_mode(inner_mode_iaf);
Kazunori MIYAZAWAdf9dcb42008-03-24 14:51:51 -07001972 }
1973 }
Herbert Xu13996372007-10-17 21:35:51 -07001974
Herbert Xud094cd82005-06-20 13:19:41 -07001975 x->type = xfrm_get_type(x->id.proto, family);
Herbert Xu72cb6962005-06-20 13:18:08 -07001976 if (x->type == NULL)
1977 goto error;
1978
1979 err = x->type->init_state(x);
1980 if (err)
1981 goto error;
1982
Herbert Xu13996372007-10-17 21:35:51 -07001983 x->outer_mode = xfrm_get_mode(x->props.mode, family);
1984 if (x->outer_mode == NULL)
Herbert Xub59f45d2006-05-27 23:05:54 -07001985 goto error;
1986
Wei Yongjuna454f0c2011-03-21 18:08:28 -07001987 if (init_replay) {
1988 err = xfrm_init_replay(x);
1989 if (err)
1990 goto error;
1991 }
1992
Herbert Xu72cb6962005-06-20 13:18:08 -07001993 x->km.state = XFRM_STATE_VALID;
1994
1995error:
1996 return err;
1997}
1998
Wei Yongjuna454f0c2011-03-21 18:08:28 -07001999EXPORT_SYMBOL(__xfrm_init_state);
2000
2001int xfrm_init_state(struct xfrm_state *x)
2002{
2003 return __xfrm_init_state(x, true);
2004}
2005
Herbert Xu72cb6962005-06-20 13:18:08 -07002006EXPORT_SYMBOL(xfrm_init_state);
YOSHIFUJI Hideakia716c112007-02-09 23:25:29 +09002007
Alexey Dobriyand62ddc22008-11-25 17:14:31 -08002008int __net_init xfrm_state_init(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002009{
David S. Millerf034b5d2006-08-24 03:08:07 -07002010 unsigned int sz;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002011
Alexey Dobriyan9d4139c2008-11-25 17:16:11 -08002012 INIT_LIST_HEAD(&net->xfrm.state_all);
2013
David S. Millerf034b5d2006-08-24 03:08:07 -07002014 sz = sizeof(struct hlist_head) * 8;
2015
Alexey Dobriyan73d189d2008-11-25 17:16:58 -08002016 net->xfrm.state_bydst = xfrm_hash_alloc(sz);
2017 if (!net->xfrm.state_bydst)
2018 goto out_bydst;
Alexey Dobriyand320bbb2008-11-25 17:17:24 -08002019 net->xfrm.state_bysrc = xfrm_hash_alloc(sz);
2020 if (!net->xfrm.state_bysrc)
2021 goto out_bysrc;
Alexey Dobriyanb754a4f2008-11-25 17:17:47 -08002022 net->xfrm.state_byspi = xfrm_hash_alloc(sz);
2023 if (!net->xfrm.state_byspi)
2024 goto out_byspi;
Alexey Dobriyan529983e2008-11-25 17:18:12 -08002025 net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1);
David S. Millerf034b5d2006-08-24 03:08:07 -07002026
Alexey Dobriyan0bf7c5b2008-11-25 17:18:39 -08002027 net->xfrm.state_num = 0;
Alexey Dobriyan63082732008-11-25 17:19:07 -08002028 INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize);
Alexey Dobriyanb8a0ae22008-11-25 17:20:11 -08002029 INIT_HLIST_HEAD(&net->xfrm.state_gc_list);
Alexey Dobriyanc7837142008-11-25 17:20:36 -08002030 INIT_WORK(&net->xfrm.state_gc_work, xfrm_state_gc_task);
Alexey Dobriyan50a30652008-11-25 17:21:01 -08002031 init_waitqueue_head(&net->xfrm.km_waitq);
Alexey Dobriyand62ddc22008-11-25 17:14:31 -08002032 return 0;
Alexey Dobriyan73d189d2008-11-25 17:16:58 -08002033
Alexey Dobriyanb754a4f2008-11-25 17:17:47 -08002034out_byspi:
2035 xfrm_hash_free(net->xfrm.state_bysrc, sz);
Alexey Dobriyand320bbb2008-11-25 17:17:24 -08002036out_bysrc:
2037 xfrm_hash_free(net->xfrm.state_bydst, sz);
Alexey Dobriyan73d189d2008-11-25 17:16:58 -08002038out_bydst:
2039 return -ENOMEM;
Alexey Dobriyand62ddc22008-11-25 17:14:31 -08002040}
2041
2042void xfrm_state_fini(struct net *net)
2043{
Alexey Dobriyan7c2776e2008-11-25 17:57:44 -08002044 struct xfrm_audit audit_info;
Alexey Dobriyan73d189d2008-11-25 17:16:58 -08002045 unsigned int sz;
2046
Alexey Dobriyan7c2776e2008-11-25 17:57:44 -08002047 flush_work(&net->xfrm.state_hash_work);
2048 audit_info.loginuid = -1;
2049 audit_info.sessionid = -1;
2050 audit_info.secid = 0;
2051 xfrm_state_flush(net, IPSEC_PROTO_ANY, &audit_info);
2052 flush_work(&net->xfrm.state_gc_work);
2053
Alexey Dobriyan9d4139c2008-11-25 17:16:11 -08002054 WARN_ON(!list_empty(&net->xfrm.state_all));
Alexey Dobriyan73d189d2008-11-25 17:16:58 -08002055
Alexey Dobriyan529983e2008-11-25 17:18:12 -08002056 sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head);
Alexey Dobriyanb754a4f2008-11-25 17:17:47 -08002057 WARN_ON(!hlist_empty(net->xfrm.state_byspi));
2058 xfrm_hash_free(net->xfrm.state_byspi, sz);
Alexey Dobriyand320bbb2008-11-25 17:17:24 -08002059 WARN_ON(!hlist_empty(net->xfrm.state_bysrc));
2060 xfrm_hash_free(net->xfrm.state_bysrc, sz);
Alexey Dobriyan73d189d2008-11-25 17:16:58 -08002061 WARN_ON(!hlist_empty(net->xfrm.state_bydst));
2062 xfrm_hash_free(net->xfrm.state_bydst, sz);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002063}
2064
Joy Lattenab5f5e82007-09-17 11:51:22 -07002065#ifdef CONFIG_AUDITSYSCALL
Ilpo Järvinencf35f432008-01-05 23:13:20 -08002066static void xfrm_audit_helper_sainfo(struct xfrm_state *x,
2067 struct audit_buffer *audit_buf)
Joy Lattenab5f5e82007-09-17 11:51:22 -07002068{
Paul Moore68277ac2007-12-20 20:49:33 -08002069 struct xfrm_sec_ctx *ctx = x->security;
2070 u32 spi = ntohl(x->id.spi);
2071
2072 if (ctx)
Joy Lattenab5f5e82007-09-17 11:51:22 -07002073 audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s",
Paul Moore68277ac2007-12-20 20:49:33 -08002074 ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str);
Joy Lattenab5f5e82007-09-17 11:51:22 -07002075
2076 switch(x->props.family) {
2077 case AF_INET:
Harvey Harrison21454aa2008-10-31 00:54:56 -07002078 audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
2079 &x->props.saddr.a4, &x->id.daddr.a4);
Joy Lattenab5f5e82007-09-17 11:51:22 -07002080 break;
2081 case AF_INET6:
Harvey Harrison5b095d9892008-10-29 12:52:50 -07002082 audit_log_format(audit_buf, " src=%pI6 dst=%pI6",
Harvey Harrisonfdb46ee2008-10-28 16:10:17 -07002083 x->props.saddr.a6, x->id.daddr.a6);
Joy Lattenab5f5e82007-09-17 11:51:22 -07002084 break;
2085 }
Paul Moore68277ac2007-12-20 20:49:33 -08002086
2087 audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
Joy Lattenab5f5e82007-09-17 11:51:22 -07002088}
2089
Ilpo Järvinencf35f432008-01-05 23:13:20 -08002090static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family,
2091 struct audit_buffer *audit_buf)
Paul Mooreafeb14b2007-12-21 14:58:11 -08002092{
Eric Dumazetb71d1d42011-04-22 04:53:02 +00002093 const struct iphdr *iph4;
2094 const struct ipv6hdr *iph6;
Paul Mooreafeb14b2007-12-21 14:58:11 -08002095
2096 switch (family) {
2097 case AF_INET:
2098 iph4 = ip_hdr(skb);
Harvey Harrison21454aa2008-10-31 00:54:56 -07002099 audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
2100 &iph4->saddr, &iph4->daddr);
Paul Mooreafeb14b2007-12-21 14:58:11 -08002101 break;
2102 case AF_INET6:
2103 iph6 = ipv6_hdr(skb);
2104 audit_log_format(audit_buf,
Harvey Harrison5b095d9892008-10-29 12:52:50 -07002105 " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x",
Harvey Harrisonfdb46ee2008-10-28 16:10:17 -07002106 &iph6->saddr,&iph6->daddr,
Paul Mooreafeb14b2007-12-21 14:58:11 -08002107 iph6->flow_lbl[0] & 0x0f,
2108 iph6->flow_lbl[1],
2109 iph6->flow_lbl[2]);
2110 break;
2111 }
2112}
2113
Paul Moore68277ac2007-12-20 20:49:33 -08002114void xfrm_audit_state_add(struct xfrm_state *x, int result,
Eric Paris25323862008-04-18 10:09:25 -04002115 uid_t auid, u32 sessionid, u32 secid)
Joy Lattenab5f5e82007-09-17 11:51:22 -07002116{
2117 struct audit_buffer *audit_buf;
Joy Lattenab5f5e82007-09-17 11:51:22 -07002118
Paul Mooreafeb14b2007-12-21 14:58:11 -08002119 audit_buf = xfrm_audit_start("SAD-add");
Joy Lattenab5f5e82007-09-17 11:51:22 -07002120 if (audit_buf == NULL)
2121 return;
Eric Paris25323862008-04-18 10:09:25 -04002122 xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf);
Paul Mooreafeb14b2007-12-21 14:58:11 -08002123 xfrm_audit_helper_sainfo(x, audit_buf);
2124 audit_log_format(audit_buf, " res=%u", result);
Joy Lattenab5f5e82007-09-17 11:51:22 -07002125 audit_log_end(audit_buf);
2126}
2127EXPORT_SYMBOL_GPL(xfrm_audit_state_add);
2128
Paul Moore68277ac2007-12-20 20:49:33 -08002129void xfrm_audit_state_delete(struct xfrm_state *x, int result,
Eric Paris25323862008-04-18 10:09:25 -04002130 uid_t auid, u32 sessionid, u32 secid)
Joy Lattenab5f5e82007-09-17 11:51:22 -07002131{
2132 struct audit_buffer *audit_buf;
Joy Lattenab5f5e82007-09-17 11:51:22 -07002133
Paul Mooreafeb14b2007-12-21 14:58:11 -08002134 audit_buf = xfrm_audit_start("SAD-delete");
Joy Lattenab5f5e82007-09-17 11:51:22 -07002135 if (audit_buf == NULL)
2136 return;
Eric Paris25323862008-04-18 10:09:25 -04002137 xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf);
Paul Mooreafeb14b2007-12-21 14:58:11 -08002138 xfrm_audit_helper_sainfo(x, audit_buf);
2139 audit_log_format(audit_buf, " res=%u", result);
Joy Lattenab5f5e82007-09-17 11:51:22 -07002140 audit_log_end(audit_buf);
2141}
2142EXPORT_SYMBOL_GPL(xfrm_audit_state_delete);
Paul Mooreafeb14b2007-12-21 14:58:11 -08002143
2144void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
2145 struct sk_buff *skb)
2146{
2147 struct audit_buffer *audit_buf;
2148 u32 spi;
2149
2150 audit_buf = xfrm_audit_start("SA-replay-overflow");
2151 if (audit_buf == NULL)
2152 return;
2153 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2154 /* don't record the sequence number because it's inherent in this kind
2155 * of audit message */
2156 spi = ntohl(x->id.spi);
2157 audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
2158 audit_log_end(audit_buf);
2159}
2160EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow);
2161
Steffen Klassert9fdc4882011-03-08 00:08:32 +00002162void xfrm_audit_state_replay(struct xfrm_state *x,
Paul Mooreafeb14b2007-12-21 14:58:11 -08002163 struct sk_buff *skb, __be32 net_seq)
2164{
2165 struct audit_buffer *audit_buf;
2166 u32 spi;
2167
2168 audit_buf = xfrm_audit_start("SA-replayed-pkt");
2169 if (audit_buf == NULL)
2170 return;
2171 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2172 spi = ntohl(x->id.spi);
2173 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2174 spi, spi, ntohl(net_seq));
2175 audit_log_end(audit_buf);
2176}
Steffen Klassert9fdc4882011-03-08 00:08:32 +00002177EXPORT_SYMBOL_GPL(xfrm_audit_state_replay);
Paul Mooreafeb14b2007-12-21 14:58:11 -08002178
2179void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family)
2180{
2181 struct audit_buffer *audit_buf;
2182
2183 audit_buf = xfrm_audit_start("SA-notfound");
2184 if (audit_buf == NULL)
2185 return;
2186 xfrm_audit_helper_pktinfo(skb, family, audit_buf);
2187 audit_log_end(audit_buf);
2188}
2189EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple);
2190
2191void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
2192 __be32 net_spi, __be32 net_seq)
2193{
2194 struct audit_buffer *audit_buf;
2195 u32 spi;
2196
2197 audit_buf = xfrm_audit_start("SA-notfound");
2198 if (audit_buf == NULL)
2199 return;
2200 xfrm_audit_helper_pktinfo(skb, family, audit_buf);
2201 spi = ntohl(net_spi);
2202 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2203 spi, spi, ntohl(net_seq));
2204 audit_log_end(audit_buf);
2205}
2206EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound);
2207
2208void xfrm_audit_state_icvfail(struct xfrm_state *x,
2209 struct sk_buff *skb, u8 proto)
2210{
2211 struct audit_buffer *audit_buf;
2212 __be32 net_spi;
2213 __be32 net_seq;
2214
2215 audit_buf = xfrm_audit_start("SA-icv-failure");
2216 if (audit_buf == NULL)
2217 return;
2218 xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
2219 if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) {
2220 u32 spi = ntohl(net_spi);
2221 audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
2222 spi, spi, ntohl(net_seq));
2223 }
2224 audit_log_end(audit_buf);
2225}
2226EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail);
Joy Lattenab5f5e82007-09-17 11:51:22 -07002227#endif /* CONFIG_AUDITSYSCALL */