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vmalloc: fix __GFP_HIGHMEM usage for vmalloc_32 on 32b systems
[linux/fpc-iii.git] / include / net / xfrm.h
blobae35991b5877029b217a2b49fba7f012f193148c
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _NET_XFRM_H
3 #define _NET_XFRM_H
4
5 #include <linux/compiler.h>
6 #include <linux/xfrm.h>
7 #include <linux/spinlock.h>
8 #include <linux/list.h>
9 #include <linux/skbuff.h>
10 #include <linux/socket.h>
11 #include <linux/pfkeyv2.h>
12 #include <linux/ipsec.h>
13 #include <linux/in6.h>
14 #include <linux/mutex.h>
15 #include <linux/audit.h>
16 #include <linux/slab.h>
17 #include <linux/refcount.h>
18
19 #include <net/sock.h>
20 #include <net/dst.h>
21 #include <net/ip.h>
22 #include <net/route.h>
23 #include <net/ipv6.h>
24 #include <net/ip6_fib.h>
25 #include <net/flow.h>
26
27 #include <linux/interrupt.h>
28
29 #ifdef CONFIG_XFRM_STATISTICS
30 #include <net/snmp.h>
31 #endif
32
33 #define XFRM_PROTO_ESP 50
34 #define XFRM_PROTO_AH 51
35 #define XFRM_PROTO_COMP 108
36 #define XFRM_PROTO_IPIP 4
37 #define XFRM_PROTO_IPV6 41
38 #define XFRM_PROTO_ROUTING IPPROTO_ROUTING
39 #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS
40
41 #define XFRM_ALIGN4(len) (((len) + 3) & ~3)
42 #define XFRM_ALIGN8(len) (((len) + 7) & ~7)
43 #define MODULE_ALIAS_XFRM_MODE(family, encap) \
44 MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap))
45 #define MODULE_ALIAS_XFRM_TYPE(family, proto) \
46 MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto))
47 #define MODULE_ALIAS_XFRM_OFFLOAD_TYPE(family, proto) \
48 MODULE_ALIAS("xfrm-offload-" __stringify(family) "-" __stringify(proto))
49
50 #ifdef CONFIG_XFRM_STATISTICS
51 #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field)
52 #else
53 #define XFRM_INC_STATS(net, field) ((void)(net))
54 #endif
55
56
57 /* Organization of SPD aka "XFRM rules"
58 ------------------------------------
59
60 Basic objects:
61 - policy rule, struct xfrm_policy (=SPD entry)
62 - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle)
63 - instance of a transformer, struct xfrm_state (=SA)
64 - template to clone xfrm_state, struct xfrm_tmpl
65
66 SPD is plain linear list of xfrm_policy rules, ordered by priority.
67 (To be compatible with existing pfkeyv2 implementations,
68 many rules with priority of 0x7fffffff are allowed to exist and
69 such rules are ordered in an unpredictable way, thanks to bsd folks.)
70
71 Lookup is plain linear search until the first match with selector.
72
73 If "action" is "block", then we prohibit the flow, otherwise:
74 if "xfrms_nr" is zero, the flow passes untransformed. Otherwise,
75 policy entry has list of up to XFRM_MAX_DEPTH transformations,
76 described by templates xfrm_tmpl. Each template is resolved
77 to a complete xfrm_state (see below) and we pack bundle of transformations
78 to a dst_entry returned to requestor.
79
80 dst -. xfrm .-> xfrm_state #1
81 |---. child .-> dst -. xfrm .-> xfrm_state #2
82 |---. child .-> dst -. xfrm .-> xfrm_state #3
83 |---. child .-> NULL
84
85 Bundles are cached at xrfm_policy struct (field ->bundles).
86
87
88 Resolution of xrfm_tmpl
89 -----------------------
90 Template contains:
91 1. ->mode Mode: transport or tunnel
92 2. ->id.proto Protocol: AH/ESP/IPCOMP
93 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode.
94 Q: allow to resolve security gateway?
95 4. ->id.spi If not zero, static SPI.
96 5. ->saddr Local tunnel endpoint, ignored for transport mode.
97 6. ->algos List of allowed algos. Plain bitmask now.
98 Q: ealgos, aalgos, calgos. What a mess...
99 7. ->share Sharing mode.
100 Q: how to implement private sharing mode? To add struct sock* to
101 flow id?
102
103 Having this template we search through SAD searching for entries
104 with appropriate mode/proto/algo, permitted by selector.
105 If no appropriate entry found, it is requested from key manager.
106
107 PROBLEMS:
108 Q: How to find all the bundles referring to a physical path for
109 PMTU discovery? Seems, dst should contain list of all parents...
110 and enter to infinite locking hierarchy disaster.
111 No! It is easier, we will not search for them, let them find us.
112 We add genid to each dst plus pointer to genid of raw IP route,
113 pmtu disc will update pmtu on raw IP route and increase its genid.
114 dst_check() will see this for top level and trigger resyncing
115 metrics. Plus, it will be made via sk->sk_dst_cache. Solved.
116 */
117
118 struct xfrm_state_walk {
119 struct list_head all;
120 u8 state;
121 u8 dying;
122 u8 proto;
123 u32 seq;
124 struct xfrm_address_filter *filter;
125 };
126
127 struct xfrm_state_offload {
128 struct net_device *dev;
129 unsigned long offload_handle;
130 unsigned int num_exthdrs;
131 u8 flags;
132 };
133
134 /* Full description of state of transformer. */
135 struct xfrm_state {
136 possible_net_t xs_net;
137 union {
138 struct hlist_node gclist;
139 struct hlist_node bydst;
140 };
141 struct hlist_node bysrc;
142 struct hlist_node byspi;
143
144 refcount_t refcnt;
145 spinlock_t lock;
146
147 struct xfrm_id id;
148 struct xfrm_selector sel;
149 struct xfrm_mark mark;
150 u32 tfcpad;
151
152 u32 genid;
153
154 /* Key manager bits */
155 struct xfrm_state_walk km;
156
157 /* Parameters of this state. */
158 struct {
159 u32 reqid;
160 u8 mode;
161 u8 replay_window;
162 u8 aalgo, ealgo, calgo;
163 u8 flags;
164 u16 family;
165 xfrm_address_t saddr;
166 int header_len;
167 int trailer_len;
168 u32 extra_flags;
169 u32 output_mark;
170 } props;
171
172 struct xfrm_lifetime_cfg lft;
173
174 /* Data for transformer */
175 struct xfrm_algo_auth *aalg;
176 struct xfrm_algo *ealg;
177 struct xfrm_algo *calg;
178 struct xfrm_algo_aead *aead;
179 const char *geniv;
180
181 /* Data for encapsulator */
182 struct xfrm_encap_tmpl *encap;
183
184 /* Data for care-of address */
185 xfrm_address_t *coaddr;
186
187 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
188 struct xfrm_state *tunnel;
189
190 /* If a tunnel, number of users + 1 */
191 atomic_t tunnel_users;
192
193 /* State for replay detection */
194 struct xfrm_replay_state replay;
195 struct xfrm_replay_state_esn *replay_esn;
196
197 /* Replay detection state at the time we sent the last notification */
198 struct xfrm_replay_state preplay;
199 struct xfrm_replay_state_esn *preplay_esn;
200
201 /* The functions for replay detection. */
202 const struct xfrm_replay *repl;
203
204 /* internal flag that only holds state for delayed aevent at the
205 * moment
206 */
207 u32 xflags;
208
209 /* Replay detection notification settings */
210 u32 replay_maxage;
211 u32 replay_maxdiff;
212
213 /* Replay detection notification timer */
214 struct timer_list rtimer;
215
216 /* Statistics */
217 struct xfrm_stats stats;
218
219 struct xfrm_lifetime_cur curlft;
220 struct tasklet_hrtimer mtimer;
221
222 struct xfrm_state_offload xso;
223
224 /* used to fix curlft->add_time when changing date */
225 long saved_tmo;
226
227 /* Last used time */
228 unsigned long lastused;
229
230 struct page_frag xfrag;
231
232 /* Reference to data common to all the instances of this
233 * transformer. */
234 const struct xfrm_type *type;
235 struct xfrm_mode *inner_mode;
236 struct xfrm_mode *inner_mode_iaf;
237 struct xfrm_mode *outer_mode;
238
239 const struct xfrm_type_offload *type_offload;
240
241 /* Security context */
242 struct xfrm_sec_ctx *security;
243
244 /* Private data of this transformer, format is opaque,
245 * interpreted by xfrm_type methods. */
246 void *data;
247 };
248
249 static inline struct net *xs_net(struct xfrm_state *x)
250 {
251 return read_pnet(&x->xs_net);
252 }
253
254 /* xflags - make enum if more show up */
255 #define XFRM_TIME_DEFER 1
256 #define XFRM_SOFT_EXPIRE 2
257
258 enum {
259 XFRM_STATE_VOID,
260 XFRM_STATE_ACQ,
261 XFRM_STATE_VALID,
262 XFRM_STATE_ERROR,
263 XFRM_STATE_EXPIRED,
264 XFRM_STATE_DEAD
265 };
266
267 /* callback structure passed from either netlink or pfkey */
268 struct km_event {
269 union {
270 u32 hard;
271 u32 proto;
272 u32 byid;
273 u32 aevent;
274 u32 type;
275 } data;
276
277 u32 seq;
278 u32 portid;
279 u32 event;
280 struct net *net;
281 };
282
283 struct xfrm_replay {
284 void (*advance)(struct xfrm_state *x, __be32 net_seq);
285 int (*check)(struct xfrm_state *x,
286 struct sk_buff *skb,
287 __be32 net_seq);
288 int (*recheck)(struct xfrm_state *x,
289 struct sk_buff *skb,
290 __be32 net_seq);
291 void (*notify)(struct xfrm_state *x, int event);
292 int (*overflow)(struct xfrm_state *x, struct sk_buff *skb);
293 };
294
295 struct net_device;
296 struct xfrm_type;
297 struct xfrm_dst;
298 struct xfrm_policy_afinfo {
299 struct dst_ops *dst_ops;
300 struct dst_entry *(*dst_lookup)(struct net *net,
301 int tos, int oif,
302 const xfrm_address_t *saddr,
303 const xfrm_address_t *daddr,
304 u32 mark);
305 int (*get_saddr)(struct net *net, int oif,
306 xfrm_address_t *saddr,
307 xfrm_address_t *daddr,
308 u32 mark);
309 void (*decode_session)(struct sk_buff *skb,
310 struct flowi *fl,
311 int reverse);
312 int (*get_tos)(const struct flowi *fl);
313 int (*init_path)(struct xfrm_dst *path,
314 struct dst_entry *dst,
315 int nfheader_len);
316 int (*fill_dst)(struct xfrm_dst *xdst,
317 struct net_device *dev,
318 const struct flowi *fl);
319 struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig);
320 };
321
322 int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo *afinfo, int family);
323 void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo *afinfo);
324 void km_policy_notify(struct xfrm_policy *xp, int dir,
325 const struct km_event *c);
326 void xfrm_policy_cache_flush(void);
327 void km_state_notify(struct xfrm_state *x, const struct km_event *c);
328
329 struct xfrm_tmpl;
330 int km_query(struct xfrm_state *x, struct xfrm_tmpl *t,
331 struct xfrm_policy *pol);
332 void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
333 int __xfrm_state_delete(struct xfrm_state *x);
334
335 struct xfrm_state_afinfo {
336 unsigned int family;
337 unsigned int proto;
338 __be16 eth_proto;
339 struct module *owner;
340 const struct xfrm_type *type_map[IPPROTO_MAX];
341 const struct xfrm_type_offload *type_offload_map[IPPROTO_MAX];
342 struct xfrm_mode *mode_map[XFRM_MODE_MAX];
343
344 int (*init_flags)(struct xfrm_state *x);
345 void (*init_tempsel)(struct xfrm_selector *sel,
346 const struct flowi *fl);
347 void (*init_temprop)(struct xfrm_state *x,
348 const struct xfrm_tmpl *tmpl,
349 const xfrm_address_t *daddr,
350 const xfrm_address_t *saddr);
351 int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n);
352 int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n);
353 int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb);
354 int (*output_finish)(struct sock *sk, struct sk_buff *skb);
355 int (*extract_input)(struct xfrm_state *x,
356 struct sk_buff *skb);
357 int (*extract_output)(struct xfrm_state *x,
358 struct sk_buff *skb);
359 int (*transport_finish)(struct sk_buff *skb,
360 int async);
361 void (*local_error)(struct sk_buff *skb, u32 mtu);
362 };
363
364 int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
365 int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
366 struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
367 struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family);
368
369 struct xfrm_input_afinfo {
370 unsigned int family;
371 int (*callback)(struct sk_buff *skb, u8 protocol,
372 int err);
373 };
374
375 int xfrm_input_register_afinfo(const struct xfrm_input_afinfo *afinfo);
376 int xfrm_input_unregister_afinfo(const struct xfrm_input_afinfo *afinfo);
377
378 void xfrm_state_delete_tunnel(struct xfrm_state *x);
379
380 struct xfrm_type {
381 char *description;
382 struct module *owner;
383 u8 proto;
384 u8 flags;
385 #define XFRM_TYPE_NON_FRAGMENT 1
386 #define XFRM_TYPE_REPLAY_PROT 2
387 #define XFRM_TYPE_LOCAL_COADDR 4
388 #define XFRM_TYPE_REMOTE_COADDR 8
389
390 int (*init_state)(struct xfrm_state *x);
391 void (*destructor)(struct xfrm_state *);
392 int (*input)(struct xfrm_state *, struct sk_buff *skb);
393 int (*output)(struct xfrm_state *, struct sk_buff *pskb);
394 int (*reject)(struct xfrm_state *, struct sk_buff *,
395 const struct flowi *);
396 int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **);
397 /* Estimate maximal size of result of transformation of a dgram */
398 u32 (*get_mtu)(struct xfrm_state *, int size);
399 };
400
401 int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
402 int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
403
404 struct xfrm_type_offload {
405 char *description;
406 struct module *owner;
407 u8 proto;
408 void (*encap)(struct xfrm_state *, struct sk_buff *pskb);
409 int (*input_tail)(struct xfrm_state *x, struct sk_buff *skb);
410 int (*xmit)(struct xfrm_state *, struct sk_buff *pskb, netdev_features_t features);
411 };
412
413 int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned short family);
414 int xfrm_unregister_type_offload(const struct xfrm_type_offload *type, unsigned short family);
415
416 struct xfrm_mode {
417 /*
418 * Remove encapsulation header.
419 *
420 * The IP header will be moved over the top of the encapsulation
421 * header.
422 *
423 * On entry, the transport header shall point to where the IP header
424 * should be and the network header shall be set to where the IP
425 * header currently is. skb->data shall point to the start of the
426 * payload.
427 */
428 int (*input2)(struct xfrm_state *x, struct sk_buff *skb);
429
430 /*
431 * This is the actual input entry point.
432 *
433 * For transport mode and equivalent this would be identical to
434 * input2 (which does not need to be set). While tunnel mode
435 * and equivalent would set this to the tunnel encapsulation function
436 * xfrm4_prepare_input that would in turn call input2.
437 */
438 int (*input)(struct xfrm_state *x, struct sk_buff *skb);
439
440 /*
441 * Add encapsulation header.
442 *
443 * On exit, the transport header will be set to the start of the
444 * encapsulation header to be filled in by x->type->output and
445 * the mac header will be set to the nextheader (protocol for
446 * IPv4) field of the extension header directly preceding the
447 * encapsulation header, or in its absence, that of the top IP
448 * header. The value of the network header will always point
449 * to the top IP header while skb->data will point to the payload.
450 */
451 int (*output2)(struct xfrm_state *x,struct sk_buff *skb);
452
453 /*
454 * This is the actual output entry point.
455 *
456 * For transport mode and equivalent this would be identical to
457 * output2 (which does not need to be set). While tunnel mode
458 * and equivalent would set this to a tunnel encapsulation function
459 * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn
460 * call output2.
461 */
462 int (*output)(struct xfrm_state *x, struct sk_buff *skb);
463
464 /*
465 * Adjust pointers into the packet and do GSO segmentation.
466 */
467 struct sk_buff *(*gso_segment)(struct xfrm_state *x, struct sk_buff *skb, netdev_features_t features);
468
469 /*
470 * Adjust pointers into the packet when IPsec is done at layer2.
471 */
472 void (*xmit)(struct xfrm_state *x, struct sk_buff *skb);
473
474 struct xfrm_state_afinfo *afinfo;
475 struct module *owner;
476 unsigned int encap;
477 int flags;
478 };
479
480 /* Flags for xfrm_mode. */
481 enum {
482 XFRM_MODE_FLAG_TUNNEL = 1,
483 };
484
485 int xfrm_register_mode(struct xfrm_mode *mode, int family);
486 int xfrm_unregister_mode(struct xfrm_mode *mode, int family);
487
488 static inline int xfrm_af2proto(unsigned int family)
489 {
490 switch(family) {
491 case AF_INET:
492 return IPPROTO_IPIP;
493 case AF_INET6:
494 return IPPROTO_IPV6;
495 default:
496 return 0;
497 }
498 }
499
500 static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
501 {
502 if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
503 (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
504 return x->inner_mode;
505 else
506 return x->inner_mode_iaf;
507 }
508
509 struct xfrm_tmpl {
510 /* id in template is interpreted as:
511 * daddr - destination of tunnel, may be zero for transport mode.
512 * spi - zero to acquire spi. Not zero if spi is static, then
513 * daddr must be fixed too.
514 * proto - AH/ESP/IPCOMP
515 */
516 struct xfrm_id id;
517
518 /* Source address of tunnel. Ignored, if it is not a tunnel. */
519 xfrm_address_t saddr;
520
521 unsigned short encap_family;
522
523 u32 reqid;
524
525 /* Mode: transport, tunnel etc. */
526 u8 mode;
527
528 /* Sharing mode: unique, this session only, this user only etc. */
529 u8 share;
530
531 /* May skip this transfomration if no SA is found */
532 u8 optional;
533
534 /* Skip aalgos/ealgos/calgos checks. */
535 u8 allalgs;
536
537 /* Bit mask of algos allowed for acquisition */
538 u32 aalgos;
539 u32 ealgos;
540 u32 calgos;
541 };
542
543 #define XFRM_MAX_DEPTH 6
544 #define XFRM_MAX_OFFLOAD_DEPTH 1
545
546 struct xfrm_policy_walk_entry {
547 struct list_head all;
548 u8 dead;
549 };
550
551 struct xfrm_policy_walk {
552 struct xfrm_policy_walk_entry walk;
553 u8 type;
554 u32 seq;
555 };
556
557 struct xfrm_policy_queue {
558 struct sk_buff_head hold_queue;
559 struct timer_list hold_timer;
560 unsigned long timeout;
561 };
562
563 struct xfrm_policy {
564 possible_net_t xp_net;
565 struct hlist_node bydst;
566 struct hlist_node byidx;
567
568 /* This lock only affects elements except for entry. */
569 rwlock_t lock;
570 refcount_t refcnt;
571 struct timer_list timer;
572
573 atomic_t genid;
574 u32 priority;
575 u32 index;
576 struct xfrm_mark mark;
577 struct xfrm_selector selector;
578 struct xfrm_lifetime_cfg lft;
579 struct xfrm_lifetime_cur curlft;
580 struct xfrm_policy_walk_entry walk;
581 struct xfrm_policy_queue polq;
582 u8 type;
583 u8 action;
584 u8 flags;
585 u8 xfrm_nr;
586 u16 family;
587 struct xfrm_sec_ctx *security;
588 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
589 struct rcu_head rcu;
590 };
591
592 static inline struct net *xp_net(const struct xfrm_policy *xp)
593 {
594 return read_pnet(&xp->xp_net);
595 }
596
597 struct xfrm_kmaddress {
598 xfrm_address_t local;
599 xfrm_address_t remote;
600 u32 reserved;
601 u16 family;
602 };
603
604 struct xfrm_migrate {
605 xfrm_address_t old_daddr;
606 xfrm_address_t old_saddr;
607 xfrm_address_t new_daddr;
608 xfrm_address_t new_saddr;
609 u8 proto;
610 u8 mode;
611 u16 reserved;
612 u32 reqid;
613 u16 old_family;
614 u16 new_family;
615 };
616
617 #define XFRM_KM_TIMEOUT 30
618 /* what happened */
619 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
620 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
621
622 /* default aevent timeout in units of 100ms */
623 #define XFRM_AE_ETIME 10
624 /* Async Event timer multiplier */
625 #define XFRM_AE_ETH_M 10
626 /* default seq threshold size */
627 #define XFRM_AE_SEQT_SIZE 2
628
629 struct xfrm_mgr {
630 struct list_head list;
631 int (*notify)(struct xfrm_state *x, const struct km_event *c);
632 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp);
633 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
634 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
635 int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
636 int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
637 int (*migrate)(const struct xfrm_selector *sel,
638 u8 dir, u8 type,
639 const struct xfrm_migrate *m,
640 int num_bundles,
641 const struct xfrm_kmaddress *k,
642 const struct xfrm_encap_tmpl *encap);
643 bool (*is_alive)(const struct km_event *c);
644 };
645
646 int xfrm_register_km(struct xfrm_mgr *km);
647 int xfrm_unregister_km(struct xfrm_mgr *km);
648
649 struct xfrm_tunnel_skb_cb {
650 union {
651 struct inet_skb_parm h4;
652 struct inet6_skb_parm h6;
653 } header;
654
655 union {
656 struct ip_tunnel *ip4;
657 struct ip6_tnl *ip6;
658 } tunnel;
659 };
660
661 #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0]))
662
663 /*
664 * This structure is used for the duration where packets are being
665 * transformed by IPsec. As soon as the packet leaves IPsec the
666 * area beyond the generic IP part may be overwritten.
667 */
668 struct xfrm_skb_cb {
669 struct xfrm_tunnel_skb_cb header;
670
671 /* Sequence number for replay protection. */
672 union {
673 struct {
674 __u32 low;
675 __u32 hi;
676 } output;
677 struct {
678 __be32 low;
679 __be32 hi;
680 } input;
681 } seq;
682 };
683
684 #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
685
686 /*
687 * This structure is used by the afinfo prepare_input/prepare_output functions
688 * to transmit header information to the mode input/output functions.
689 */
690 struct xfrm_mode_skb_cb {
691 struct xfrm_tunnel_skb_cb header;
692
693 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
694 __be16 id;
695 __be16 frag_off;
696
697 /* IP header length (excluding options or extension headers). */
698 u8 ihl;
699
700 /* TOS for IPv4, class for IPv6. */
701 u8 tos;
702
703 /* TTL for IPv4, hop limitfor IPv6. */
704 u8 ttl;
705
706 /* Protocol for IPv4, NH for IPv6. */
707 u8 protocol;
708
709 /* Option length for IPv4, zero for IPv6. */
710 u8 optlen;
711
712 /* Used by IPv6 only, zero for IPv4. */
713 u8 flow_lbl[3];
714 };
715
716 #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
717
718 /*
719 * This structure is used by the input processing to locate the SPI and
720 * related information.
721 */
722 struct xfrm_spi_skb_cb {
723 struct xfrm_tunnel_skb_cb header;
724
725 unsigned int daddroff;
726 unsigned int family;
727 __be32 seq;
728 };
729
730 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
731
732 #ifdef CONFIG_AUDITSYSCALL
733 static inline struct audit_buffer *xfrm_audit_start(const char *op)
734 {
735 struct audit_buffer *audit_buf = NULL;
736
737 if (audit_enabled == 0)
738 return NULL;
739 audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC,
740 AUDIT_MAC_IPSEC_EVENT);
741 if (audit_buf == NULL)
742 return NULL;
743 audit_log_format(audit_buf, "op=%s", op);
744 return audit_buf;
745 }
746
747 static inline void xfrm_audit_helper_usrinfo(bool task_valid,
748 struct audit_buffer *audit_buf)
749 {
750 const unsigned int auid = from_kuid(&init_user_ns, task_valid ?
751 audit_get_loginuid(current) :
752 INVALID_UID);
753 const unsigned int ses = task_valid ? audit_get_sessionid(current) :
754 (unsigned int) -1;
755
756 audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses);
757 audit_log_task_context(audit_buf);
758 }
759
760 void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid);
761 void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
762 bool task_valid);
763 void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid);
764 void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid);
765 void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
766 struct sk_buff *skb);
767 void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb,
768 __be32 net_seq);
769 void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
770 void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi,
771 __be32 net_seq);
772 void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb,
773 u8 proto);
774 #else
775
776 static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
777 bool task_valid)
778 {
779 }
780
781 static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
782 bool task_valid)
783 {
784 }
785
786 static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
787 bool task_valid)
788 {
789 }
790
791 static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
792 bool task_valid)
793 {
794 }
795
796 static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
797 struct sk_buff *skb)
798 {
799 }
800
801 static inline void xfrm_audit_state_replay(struct xfrm_state *x,
802 struct sk_buff *skb, __be32 net_seq)
803 {
804 }
805
806 static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
807 u16 family)
808 {
809 }
810
811 static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
812 __be32 net_spi, __be32 net_seq)
813 {
814 }
815
816 static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
817 struct sk_buff *skb, u8 proto)
818 {
819 }
820 #endif /* CONFIG_AUDITSYSCALL */
821
822 static inline void xfrm_pol_hold(struct xfrm_policy *policy)
823 {
824 if (likely(policy != NULL))
825 refcount_inc(&policy->refcnt);
826 }
827
828 void xfrm_policy_destroy(struct xfrm_policy *policy);
829
830 static inline void xfrm_pol_put(struct xfrm_policy *policy)
831 {
832 if (refcount_dec_and_test(&policy->refcnt))
833 xfrm_policy_destroy(policy);
834 }
835
836 static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
837 {
838 int i;
839 for (i = npols - 1; i >= 0; --i)
840 xfrm_pol_put(pols[i]);
841 }
842
843 void __xfrm_state_destroy(struct xfrm_state *);
844
845 static inline void __xfrm_state_put(struct xfrm_state *x)
846 {
847 refcount_dec(&x->refcnt);
848 }
849
850 static inline void xfrm_state_put(struct xfrm_state *x)
851 {
852 if (refcount_dec_and_test(&x->refcnt))
853 __xfrm_state_destroy(x);
854 }
855
856 static inline void xfrm_state_hold(struct xfrm_state *x)
857 {
858 refcount_inc(&x->refcnt);
859 }
860
861 static inline bool addr_match(const void *token1, const void *token2,
862 unsigned int prefixlen)
863 {
864 const __be32 *a1 = token1;
865 const __be32 *a2 = token2;
866 unsigned int pdw;
867 unsigned int pbi;
868
869 pdw = prefixlen >> 5; /* num of whole u32 in prefix */
870 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
871
872 if (pdw)
873 if (memcmp(a1, a2, pdw << 2))
874 return false;
875
876 if (pbi) {
877 __be32 mask;
878
879 mask = htonl((0xffffffff) << (32 - pbi));
880
881 if ((a1[pdw] ^ a2[pdw]) & mask)
882 return false;
883 }
884
885 return true;
886 }
887
888 static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
889 {
890 /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
891 if (sizeof(long) == 4 && prefixlen == 0)
892 return true;
893 return !((a1 ^ a2) & htonl(~0UL << (32 - prefixlen)));
894 }
895
896 static __inline__
897 __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
898 {
899 __be16 port;
900 switch(fl->flowi_proto) {
901 case IPPROTO_TCP:
902 case IPPROTO_UDP:
903 case IPPROTO_UDPLITE:
904 case IPPROTO_SCTP:
905 port = uli->ports.sport;
906 break;
907 case IPPROTO_ICMP:
908 case IPPROTO_ICMPV6:
909 port = htons(uli->icmpt.type);
910 break;
911 case IPPROTO_MH:
912 port = htons(uli->mht.type);
913 break;
914 case IPPROTO_GRE:
915 port = htons(ntohl(uli->gre_key) >> 16);
916 break;
917 default:
918 port = 0; /*XXX*/
919 }
920 return port;
921 }
922
923 static __inline__
924 __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
925 {
926 __be16 port;
927 switch(fl->flowi_proto) {
928 case IPPROTO_TCP:
929 case IPPROTO_UDP:
930 case IPPROTO_UDPLITE:
931 case IPPROTO_SCTP:
932 port = uli->ports.dport;
933 break;
934 case IPPROTO_ICMP:
935 case IPPROTO_ICMPV6:
936 port = htons(uli->icmpt.code);
937 break;
938 case IPPROTO_GRE:
939 port = htons(ntohl(uli->gre_key) & 0xffff);
940 break;
941 default:
942 port = 0; /*XXX*/
943 }
944 return port;
945 }
946
947 bool xfrm_selector_match(const struct xfrm_selector *sel,
948 const struct flowi *fl, unsigned short family);
949
950 #ifdef CONFIG_SECURITY_NETWORK_XFRM
951 /* If neither has a context --> match
952 * Otherwise, both must have a context and the sids, doi, alg must match
953 */
954 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
955 {
956 return ((!s1 && !s2) ||
957 (s1 && s2 &&
958 (s1->ctx_sid == s2->ctx_sid) &&
959 (s1->ctx_doi == s2->ctx_doi) &&
960 (s1->ctx_alg == s2->ctx_alg)));
961 }
962 #else
963 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
964 {
965 return true;
966 }
967 #endif
968
969 /* A struct encoding bundle of transformations to apply to some set of flow.
970 *
971 * dst->child points to the next element of bundle.
972 * dst->xfrm points to an instanse of transformer.
973 *
974 * Due to unfortunate limitations of current routing cache, which we
975 * have no time to fix, it mirrors struct rtable and bound to the same
976 * routing key, including saddr,daddr. However, we can have many of
977 * bundles differing by session id. All the bundles grow from a parent
978 * policy rule.
979 */
980 struct xfrm_dst {
981 union {
982 struct dst_entry dst;
983 struct rtable rt;
984 struct rt6_info rt6;
985 } u;
986 struct dst_entry *route;
987 struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
988 int num_pols, num_xfrms;
989 u32 xfrm_genid;
990 u32 policy_genid;
991 u32 route_mtu_cached;
992 u32 child_mtu_cached;
993 u32 route_cookie;
994 u32 path_cookie;
995 };
996
997 #ifdef CONFIG_XFRM
998 static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
999 {
1000 xfrm_pols_put(xdst->pols, xdst->num_pols);
1001 dst_release(xdst->route);
1002 if (likely(xdst->u.dst.xfrm))
1003 xfrm_state_put(xdst->u.dst.xfrm);
1004 }
1005 #endif
1006
1007 void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
1008
1009 struct xfrm_offload {
1010 /* Output sequence number for replay protection on offloading. */
1011 struct {
1012 __u32 low;
1013 __u32 hi;
1014 } seq;
1015
1016 __u32 flags;
1017 #define SA_DELETE_REQ 1
1018 #define CRYPTO_DONE 2
1019 #define CRYPTO_NEXT_DONE 4
1020 #define CRYPTO_FALLBACK 8
1021 #define XFRM_GSO_SEGMENT 16
1022 #define XFRM_GRO 32
1023 #define XFRM_ESP_NO_TRAILER 64
1024
1025 __u32 status;
1026 #define CRYPTO_SUCCESS 1
1027 #define CRYPTO_GENERIC_ERROR 2
1028 #define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4
1029 #define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8
1030 #define CRYPTO_TUNNEL_AH_AUTH_FAILED 16
1031 #define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32
1032 #define CRYPTO_INVALID_PACKET_SYNTAX 64
1033 #define CRYPTO_INVALID_PROTOCOL 128
1034
1035 __u8 proto;
1036 };
1037
1038 struct sec_path {
1039 refcount_t refcnt;
1040 int len;
1041 int olen;
1042
1043 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
1044 struct xfrm_offload ovec[XFRM_MAX_OFFLOAD_DEPTH];
1045 };
1046
1047 static inline int secpath_exists(struct sk_buff *skb)
1048 {
1049 #ifdef CONFIG_XFRM
1050 return skb->sp != NULL;
1051 #else
1052 return 0;
1053 #endif
1054 }
1055
1056 static inline struct sec_path *
1057 secpath_get(struct sec_path *sp)
1058 {
1059 if (sp)
1060 refcount_inc(&sp->refcnt);
1061 return sp;
1062 }
1063
1064 void __secpath_destroy(struct sec_path *sp);
1065
1066 static inline void
1067 secpath_put(struct sec_path *sp)
1068 {
1069 if (sp && refcount_dec_and_test(&sp->refcnt))
1070 __secpath_destroy(sp);
1071 }
1072
1073 struct sec_path *secpath_dup(struct sec_path *src);
1074 int secpath_set(struct sk_buff *skb);
1075
1076 static inline void
1077 secpath_reset(struct sk_buff *skb)
1078 {
1079 #ifdef CONFIG_XFRM
1080 secpath_put(skb->sp);
1081 skb->sp = NULL;
1082 #endif
1083 }
1084
1085 static inline int
1086 xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
1087 {
1088 switch (family) {
1089 case AF_INET:
1090 return addr->a4 == 0;
1091 case AF_INET6:
1092 return ipv6_addr_any(&addr->in6);
1093 }
1094 return 0;
1095 }
1096
1097 static inline int
1098 __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1099 {
1100 return (tmpl->saddr.a4 &&
1101 tmpl->saddr.a4 != x->props.saddr.a4);
1102 }
1103
1104 static inline int
1105 __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1106 {
1107 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
1108 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
1109 }
1110
1111 static inline int
1112 xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
1113 {
1114 switch (family) {
1115 case AF_INET:
1116 return __xfrm4_state_addr_cmp(tmpl, x);
1117 case AF_INET6:
1118 return __xfrm6_state_addr_cmp(tmpl, x);
1119 }
1120 return !0;
1121 }
1122
1123 #ifdef CONFIG_XFRM
1124 int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb,
1125 unsigned short family);
1126
1127 static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1128 struct sk_buff *skb,
1129 unsigned int family, int reverse)
1130 {
1131 struct net *net = dev_net(skb->dev);
1132 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1133
1134 if (sk && sk->sk_policy[XFRM_POLICY_IN])
1135 return __xfrm_policy_check(sk, ndir, skb, family);
1136
1137 return (!net->xfrm.policy_count[dir] && !skb->sp) ||
1138 (skb_dst(skb)->flags & DST_NOPOLICY) ||
1139 __xfrm_policy_check(sk, ndir, skb, family);
1140 }
1141
1142 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1143 {
1144 return __xfrm_policy_check2(sk, dir, skb, family, 0);
1145 }
1146
1147 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1148 {
1149 return xfrm_policy_check(sk, dir, skb, AF_INET);
1150 }
1151
1152 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1153 {
1154 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1155 }
1156
1157 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1158 struct sk_buff *skb)
1159 {
1160 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1161 }
1162
1163 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1164 struct sk_buff *skb)
1165 {
1166 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1167 }
1168
1169 int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1170 unsigned int family, int reverse);
1171
1172 static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1173 unsigned int family)
1174 {
1175 return __xfrm_decode_session(skb, fl, family, 0);
1176 }
1177
1178 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1179 struct flowi *fl,
1180 unsigned int family)
1181 {
1182 return __xfrm_decode_session(skb, fl, family, 1);
1183 }
1184
1185 int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1186
1187 static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1188 {
1189 struct net *net = dev_net(skb->dev);
1190
1191 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
1192 (skb_dst(skb)->flags & DST_NOXFRM) ||
1193 __xfrm_route_forward(skb, family);
1194 }
1195
1196 static inline int xfrm4_route_forward(struct sk_buff *skb)
1197 {
1198 return xfrm_route_forward(skb, AF_INET);
1199 }
1200
1201 static inline int xfrm6_route_forward(struct sk_buff *skb)
1202 {
1203 return xfrm_route_forward(skb, AF_INET6);
1204 }
1205
1206 int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk);
1207
1208 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk)
1209 {
1210 sk->sk_policy[0] = NULL;
1211 sk->sk_policy[1] = NULL;
1212 if (unlikely(osk->sk_policy[0] || osk->sk_policy[1]))
1213 return __xfrm_sk_clone_policy(sk, osk);
1214 return 0;
1215 }
1216
1217 int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
1218
1219 static inline void xfrm_sk_free_policy(struct sock *sk)
1220 {
1221 struct xfrm_policy *pol;
1222
1223 pol = rcu_dereference_protected(sk->sk_policy[0], 1);
1224 if (unlikely(pol != NULL)) {
1225 xfrm_policy_delete(pol, XFRM_POLICY_MAX);
1226 sk->sk_policy[0] = NULL;
1227 }
1228 pol = rcu_dereference_protected(sk->sk_policy[1], 1);
1229 if (unlikely(pol != NULL)) {
1230 xfrm_policy_delete(pol, XFRM_POLICY_MAX+1);
1231 sk->sk_policy[1] = NULL;
1232 }
1233 }
1234
1235 #else
1236
1237 static inline void xfrm_sk_free_policy(struct sock *sk) {}
1238 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; }
1239 static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1240 static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1241 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1242 {
1243 return 1;
1244 }
1245 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1246 {
1247 return 1;
1248 }
1249 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1250 {
1251 return 1;
1252 }
1253 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1254 struct flowi *fl,
1255 unsigned int family)
1256 {
1257 return -ENOSYS;
1258 }
1259 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1260 struct sk_buff *skb)
1261 {
1262 return 1;
1263 }
1264 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1265 struct sk_buff *skb)
1266 {
1267 return 1;
1268 }
1269 #endif
1270
1271 static __inline__
1272 xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
1273 {
1274 switch (family){
1275 case AF_INET:
1276 return (xfrm_address_t *)&fl->u.ip4.daddr;
1277 case AF_INET6:
1278 return (xfrm_address_t *)&fl->u.ip6.daddr;
1279 }
1280 return NULL;
1281 }
1282
1283 static __inline__
1284 xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
1285 {
1286 switch (family){
1287 case AF_INET:
1288 return (xfrm_address_t *)&fl->u.ip4.saddr;
1289 case AF_INET6:
1290 return (xfrm_address_t *)&fl->u.ip6.saddr;
1291 }
1292 return NULL;
1293 }
1294
1295 static __inline__
1296 void xfrm_flowi_addr_get(const struct flowi *fl,
1297 xfrm_address_t *saddr, xfrm_address_t *daddr,
1298 unsigned short family)
1299 {
1300 switch(family) {
1301 case AF_INET:
1302 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1303 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
1304 break;
1305 case AF_INET6:
1306 saddr->in6 = fl->u.ip6.saddr;
1307 daddr->in6 = fl->u.ip6.daddr;
1308 break;
1309 }
1310 }
1311
1312 static __inline__ int
1313 __xfrm4_state_addr_check(const struct xfrm_state *x,
1314 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1315 {
1316 if (daddr->a4 == x->id.daddr.a4 &&
1317 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1318 return 1;
1319 return 0;
1320 }
1321
1322 static __inline__ int
1323 __xfrm6_state_addr_check(const struct xfrm_state *x,
1324 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1325 {
1326 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1327 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
1328 ipv6_addr_any((struct in6_addr *)saddr) ||
1329 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1330 return 1;
1331 return 0;
1332 }
1333
1334 static __inline__ int
1335 xfrm_state_addr_check(const struct xfrm_state *x,
1336 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1337 unsigned short family)
1338 {
1339 switch (family) {
1340 case AF_INET:
1341 return __xfrm4_state_addr_check(x, daddr, saddr);
1342 case AF_INET6:
1343 return __xfrm6_state_addr_check(x, daddr, saddr);
1344 }
1345 return 0;
1346 }
1347
1348 static __inline__ int
1349 xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
1350 unsigned short family)
1351 {
1352 switch (family) {
1353 case AF_INET:
1354 return __xfrm4_state_addr_check(x,
1355 (const xfrm_address_t *)&fl->u.ip4.daddr,
1356 (const xfrm_address_t *)&fl->u.ip4.saddr);
1357 case AF_INET6:
1358 return __xfrm6_state_addr_check(x,
1359 (const xfrm_address_t *)&fl->u.ip6.daddr,
1360 (const xfrm_address_t *)&fl->u.ip6.saddr);
1361 }
1362 return 0;
1363 }
1364
1365 static inline int xfrm_state_kern(const struct xfrm_state *x)
1366 {
1367 return atomic_read(&x->tunnel_users);
1368 }
1369
1370 static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1371 {
1372 return (!userproto || proto == userproto ||
1373 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1374 proto == IPPROTO_ESP ||
1375 proto == IPPROTO_COMP)));
1376 }
1377
1378 /*
1379 * xfrm algorithm information
1380 */
1381 struct xfrm_algo_aead_info {
1382 char *geniv;
1383 u16 icv_truncbits;
1384 };
1385
1386 struct xfrm_algo_auth_info {
1387 u16 icv_truncbits;
1388 u16 icv_fullbits;
1389 };
1390
1391 struct xfrm_algo_encr_info {
1392 char *geniv;
1393 u16 blockbits;
1394 u16 defkeybits;
1395 };
1396
1397 struct xfrm_algo_comp_info {
1398 u16 threshold;
1399 };
1400
1401 struct xfrm_algo_desc {
1402 char *name;
1403 char *compat;
1404 u8 available:1;
1405 u8 pfkey_supported:1;
1406 union {
1407 struct xfrm_algo_aead_info aead;
1408 struct xfrm_algo_auth_info auth;
1409 struct xfrm_algo_encr_info encr;
1410 struct xfrm_algo_comp_info comp;
1411 } uinfo;
1412 struct sadb_alg desc;
1413 };
1414
1415 /* XFRM protocol handlers. */
1416 struct xfrm4_protocol {
1417 int (*handler)(struct sk_buff *skb);
1418 int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
1419 int encap_type);
1420 int (*cb_handler)(struct sk_buff *skb, int err);
1421 int (*err_handler)(struct sk_buff *skb, u32 info);
1422
1423 struct xfrm4_protocol __rcu *next;
1424 int priority;
1425 };
1426
1427 struct xfrm6_protocol {
1428 int (*handler)(struct sk_buff *skb);
1429 int (*cb_handler)(struct sk_buff *skb, int err);
1430 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1431 u8 type, u8 code, int offset, __be32 info);
1432
1433 struct xfrm6_protocol __rcu *next;
1434 int priority;
1435 };
1436
1437 /* XFRM tunnel handlers. */
1438 struct xfrm_tunnel {
1439 int (*handler)(struct sk_buff *skb);
1440 int (*err_handler)(struct sk_buff *skb, u32 info);
1441
1442 struct xfrm_tunnel __rcu *next;
1443 int priority;
1444 };
1445
1446 struct xfrm6_tunnel {
1447 int (*handler)(struct sk_buff *skb);
1448 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1449 u8 type, u8 code, int offset, __be32 info);
1450 struct xfrm6_tunnel __rcu *next;
1451 int priority;
1452 };
1453
1454 void xfrm_init(void);
1455 void xfrm4_init(void);
1456 int xfrm_state_init(struct net *net);
1457 void xfrm_state_fini(struct net *net);
1458 void xfrm4_state_init(void);
1459 void xfrm4_protocol_init(void);
1460 #ifdef CONFIG_XFRM
1461 int xfrm6_init(void);
1462 void xfrm6_fini(void);
1463 int xfrm6_state_init(void);
1464 void xfrm6_state_fini(void);
1465 int xfrm6_protocol_init(void);
1466 void xfrm6_protocol_fini(void);
1467 #else
1468 static inline int xfrm6_init(void)
1469 {
1470 return 0;
1471 }
1472 static inline void xfrm6_fini(void)
1473 {
1474 ;
1475 }
1476 #endif
1477
1478 #ifdef CONFIG_XFRM_STATISTICS
1479 int xfrm_proc_init(struct net *net);
1480 void xfrm_proc_fini(struct net *net);
1481 #endif
1482
1483 int xfrm_sysctl_init(struct net *net);
1484 #ifdef CONFIG_SYSCTL
1485 void xfrm_sysctl_fini(struct net *net);
1486 #else
1487 static inline void xfrm_sysctl_fini(struct net *net)
1488 {
1489 }
1490 #endif
1491
1492 void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
1493 struct xfrm_address_filter *filter);
1494 int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1495 int (*func)(struct xfrm_state *, int, void*), void *);
1496 void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net);
1497 struct xfrm_state *xfrm_state_alloc(struct net *net);
1498 struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1499 const xfrm_address_t *saddr,
1500 const struct flowi *fl,
1501 struct xfrm_tmpl *tmpl,
1502 struct xfrm_policy *pol, int *err,
1503 unsigned short family);
1504 struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark,
1505 xfrm_address_t *daddr,
1506 xfrm_address_t *saddr,
1507 unsigned short family,
1508 u8 mode, u8 proto, u32 reqid);
1509 struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
1510 unsigned short family);
1511 int xfrm_state_check_expire(struct xfrm_state *x);
1512 void xfrm_state_insert(struct xfrm_state *x);
1513 int xfrm_state_add(struct xfrm_state *x);
1514 int xfrm_state_update(struct xfrm_state *x);
1515 struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1516 const xfrm_address_t *daddr, __be32 spi,
1517 u8 proto, unsigned short family);
1518 struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1519 const xfrm_address_t *daddr,
1520 const xfrm_address_t *saddr,
1521 u8 proto,
1522 unsigned short family);
1523 #ifdef CONFIG_XFRM_SUB_POLICY
1524 int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1525 unsigned short family, struct net *net);
1526 int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1527 unsigned short family);
1528 #else
1529 static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1530 int n, unsigned short family, struct net *net)
1531 {
1532 return -ENOSYS;
1533 }
1534
1535 static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1536 int n, unsigned short family)
1537 {
1538 return -ENOSYS;
1539 }
1540 #endif
1541
1542 struct xfrmk_sadinfo {
1543 u32 sadhcnt; /* current hash bkts */
1544 u32 sadhmcnt; /* max allowed hash bkts */
1545 u32 sadcnt; /* current running count */
1546 };
1547
1548 struct xfrmk_spdinfo {
1549 u32 incnt;
1550 u32 outcnt;
1551 u32 fwdcnt;
1552 u32 inscnt;
1553 u32 outscnt;
1554 u32 fwdscnt;
1555 u32 spdhcnt;
1556 u32 spdhmcnt;
1557 };
1558
1559 struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1560 int xfrm_state_delete(struct xfrm_state *x);
1561 int xfrm_state_flush(struct net *net, u8 proto, bool task_valid);
1562 int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid);
1563 void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1564 void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1565 u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1566 int xfrm_init_replay(struct xfrm_state *x);
1567 int xfrm_state_mtu(struct xfrm_state *x, int mtu);
1568 int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload);
1569 int xfrm_init_state(struct xfrm_state *x);
1570 int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb);
1571 int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
1572 int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
1573 int xfrm_trans_queue(struct sk_buff *skb,
1574 int (*finish)(struct net *, struct sock *,
1575 struct sk_buff *));
1576 int xfrm_output_resume(struct sk_buff *skb, int err);
1577 int xfrm_output(struct sock *sk, struct sk_buff *skb);
1578 int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1579 void xfrm_local_error(struct sk_buff *skb, int mtu);
1580 int xfrm4_extract_header(struct sk_buff *skb);
1581 int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1582 int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1583 int encap_type);
1584 int xfrm4_transport_finish(struct sk_buff *skb, int async);
1585 int xfrm4_rcv(struct sk_buff *skb);
1586 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1587
1588 static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1589 {
1590 XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
1591 XFRM_SPI_SKB_CB(skb)->family = AF_INET;
1592 XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
1593 return xfrm_input(skb, nexthdr, spi, 0);
1594 }
1595
1596 int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1597 int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1598 int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1599 int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb);
1600 int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1601 int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol);
1602 int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol);
1603 int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1604 int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
1605 void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
1606 int xfrm6_extract_header(struct sk_buff *skb);
1607 int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1608 int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi,
1609 struct ip6_tnl *t);
1610 int xfrm6_transport_finish(struct sk_buff *skb, int async);
1611 int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t);
1612 int xfrm6_rcv(struct sk_buff *skb);
1613 int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1614 xfrm_address_t *saddr, u8 proto);
1615 void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
1616 int xfrm6_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1617 int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol);
1618 int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol);
1619 int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1620 int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
1621 __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1622 __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1623 int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1624 int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1625 int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1626 int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb);
1627 int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1628 u8 **prevhdr);
1629
1630 #ifdef CONFIG_XFRM
1631 int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1632 int xfrm_user_policy(struct sock *sk, int optname,
1633 u8 __user *optval, int optlen);
1634 #else
1635 static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1636 {
1637 return -ENOPROTOOPT;
1638 }
1639
1640 static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
1641 {
1642 /* should not happen */
1643 kfree_skb(skb);
1644 return 0;
1645 }
1646 #endif
1647
1648 struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif,
1649 const xfrm_address_t *saddr,
1650 const xfrm_address_t *daddr,
1651 int family, u32 mark);
1652
1653 struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
1654
1655 void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1656 int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1657 int (*func)(struct xfrm_policy *, int, int, void*),
1658 void *);
1659 void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net);
1660 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
1661 struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark,
1662 u8 type, int dir,
1663 struct xfrm_selector *sel,
1664 struct xfrm_sec_ctx *ctx, int delete,
1665 int *err);
1666 struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir,
1667 u32 id, int delete, int *err);
1668 int xfrm_policy_flush(struct net *net, u8 type, bool task_valid);
1669 void xfrm_policy_hash_rebuild(struct net *net);
1670 u32 xfrm_get_acqseq(void);
1671 int verify_spi_info(u8 proto, u32 min, u32 max);
1672 int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
1673 struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark,
1674 u8 mode, u32 reqid, u8 proto,
1675 const xfrm_address_t *daddr,
1676 const xfrm_address_t *saddr, int create,
1677 unsigned short family);
1678 int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
1679
1680 #ifdef CONFIG_XFRM_MIGRATE
1681 int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1682 const struct xfrm_migrate *m, int num_bundles,
1683 const struct xfrm_kmaddress *k,
1684 const struct xfrm_encap_tmpl *encap);
1685 struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net);
1686 struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
1687 struct xfrm_migrate *m,
1688 struct xfrm_encap_tmpl *encap);
1689 int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1690 struct xfrm_migrate *m, int num_bundles,
1691 struct xfrm_kmaddress *k, struct net *net,
1692 struct xfrm_encap_tmpl *encap);
1693 #endif
1694
1695 int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1696 void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1697 int km_report(struct net *net, u8 proto, struct xfrm_selector *sel,
1698 xfrm_address_t *addr);
1699
1700 void xfrm_input_init(void);
1701 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1702
1703 void xfrm_probe_algs(void);
1704 int xfrm_count_pfkey_auth_supported(void);
1705 int xfrm_count_pfkey_enc_supported(void);
1706 struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1707 struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1708 struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1709 struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1710 struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1711 struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1712 struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1713 struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1714 struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1715 int probe);
1716
1717 static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1718 const xfrm_address_t *b)
1719 {
1720 return ipv6_addr_equal((const struct in6_addr *)a,
1721 (const struct in6_addr *)b);
1722 }
1723
1724 static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1725 const xfrm_address_t *b,
1726 sa_family_t family)
1727 {
1728 switch (family) {
1729 default:
1730 case AF_INET:
1731 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1732 case AF_INET6:
1733 return xfrm6_addr_equal(a, b);
1734 }
1735 }
1736
1737 static inline int xfrm_policy_id2dir(u32 index)
1738 {
1739 return index & 7;
1740 }
1741
1742 #ifdef CONFIG_XFRM
1743 static inline int xfrm_aevent_is_on(struct net *net)
1744 {
1745 struct sock *nlsk;
1746 int ret = 0;
1747
1748 rcu_read_lock();
1749 nlsk = rcu_dereference(net->xfrm.nlsk);
1750 if (nlsk)
1751 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1752 rcu_read_unlock();
1753 return ret;
1754 }
1755
1756 static inline int xfrm_acquire_is_on(struct net *net)
1757 {
1758 struct sock *nlsk;
1759 int ret = 0;
1760
1761 rcu_read_lock();
1762 nlsk = rcu_dereference(net->xfrm.nlsk);
1763 if (nlsk)
1764 ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE);
1765 rcu_read_unlock();
1766
1767 return ret;
1768 }
1769 #endif
1770
1771 static inline unsigned int aead_len(struct xfrm_algo_aead *alg)
1772 {
1773 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1774 }
1775
1776 static inline unsigned int xfrm_alg_len(const struct xfrm_algo *alg)
1777 {
1778 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1779 }
1780
1781 static inline unsigned int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
1782 {
1783 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1784 }
1785
1786 static inline unsigned int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1787 {
1788 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1789 }
1790
1791 #ifdef CONFIG_XFRM_MIGRATE
1792 static inline int xfrm_replay_clone(struct xfrm_state *x,
1793 struct xfrm_state *orig)
1794 {
1795 x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
1796 GFP_KERNEL);
1797 if (!x->replay_esn)
1798 return -ENOMEM;
1799
1800 x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
1801 x->replay_esn->replay_window = orig->replay_esn->replay_window;
1802
1803 x->preplay_esn = kmemdup(x->replay_esn,
1804 xfrm_replay_state_esn_len(x->replay_esn),
1805 GFP_KERNEL);
1806 if (!x->preplay_esn) {
1807 kfree(x->replay_esn);
1808 return -ENOMEM;
1809 }
1810
1811 return 0;
1812 }
1813
1814 static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig)
1815 {
1816 return kmemdup(orig, aead_len(orig), GFP_KERNEL);
1817 }
1818
1819
1820 static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1821 {
1822 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
1823 }
1824
1825 static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1826 {
1827 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1828 }
1829
1830 static inline void xfrm_states_put(struct xfrm_state **states, int n)
1831 {
1832 int i;
1833 for (i = 0; i < n; i++)
1834 xfrm_state_put(*(states + i));
1835 }
1836
1837 static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1838 {
1839 int i;
1840 for (i = 0; i < n; i++)
1841 xfrm_state_delete(*(states + i));
1842 }
1843 #endif
1844
1845 #ifdef CONFIG_XFRM
1846 static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1847 {
1848 return skb->sp->xvec[skb->sp->len - 1];
1849 }
1850 static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb)
1851 {
1852 struct sec_path *sp = skb->sp;
1853
1854 if (!sp || !sp->olen || sp->len != sp->olen)
1855 return NULL;
1856
1857 return &sp->ovec[sp->olen - 1];
1858 }
1859 #endif
1860
1861 void __net_init xfrm_dev_init(void);
1862
1863 #ifdef CONFIG_XFRM_OFFLOAD
1864 int validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features);
1865 int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
1866 struct xfrm_user_offload *xuo);
1867 bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x);
1868
1869 static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
1870 {
1871 struct xfrm_state *x = dst->xfrm;
1872
1873 if (!x || !x->type_offload)
1874 return false;
1875
1876 if (x->xso.offload_handle && (x->xso.dev == dst->path->dev) &&
1877 !dst->child->xfrm)
1878 return true;
1879
1880 return false;
1881 }
1882
1883 static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1884 {
1885 struct xfrm_state_offload *xso = &x->xso;
1886
1887 if (xso->dev)
1888 xso->dev->xfrmdev_ops->xdo_dev_state_delete(x);
1889 }
1890
1891 static inline void xfrm_dev_state_free(struct xfrm_state *x)
1892 {
1893 struct xfrm_state_offload *xso = &x->xso;
1894 struct net_device *dev = xso->dev;
1895
1896 if (dev && dev->xfrmdev_ops) {
1897 dev->xfrmdev_ops->xdo_dev_state_free(x);
1898 xso->dev = NULL;
1899 dev_put(dev);
1900 }
1901 }
1902 #else
1903 static inline int validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features)
1904 {
1905 return 0;
1906 }
1907
1908 static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo)
1909 {
1910 return 0;
1911 }
1912
1913 static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1914 {
1915 }
1916
1917 static inline void xfrm_dev_state_free(struct xfrm_state *x)
1918 {
1919 }
1920
1921 static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x)
1922 {
1923 return false;
1924 }
1925
1926 static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
1927 {
1928 return false;
1929 }
1930 #endif
1931
1932 static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1933 {
1934 if (attrs[XFRMA_MARK])
1935 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
1936 else
1937 m->v = m->m = 0;
1938
1939 return m->v & m->m;
1940 }
1941
1942 static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
1943 {
1944 int ret = 0;
1945
1946 if (m->m | m->v)
1947 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
1948 return ret;
1949 }
1950
1951 static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x,
1952 unsigned int family)
1953 {
1954 bool tunnel = false;
1955
1956 switch(family) {
1957 case AF_INET:
1958 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4)
1959 tunnel = true;
1960 break;
1961 case AF_INET6:
1962 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6)
1963 tunnel = true;
1964 break;
1965 }
1966 if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL))
1967 return -EINVAL;
1968
1969 return 0;
1970 }
1971 #endif /* _NET_XFRM_H */
Linux with added FPC-III support