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drm/panfrost: Remove set but not used variable 'bo'
[linux/fpc-iii.git] / include / net / xfrm.h
blob8f71c111e65afb8d32444bb11f73ffa7b099733a
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 #include <net/gro_cells.h>
27
28 #include <linux/interrupt.h>
29
30 #ifdef CONFIG_XFRM_STATISTICS
31 #include <net/snmp.h>
32 #endif
33
34 #define XFRM_PROTO_ESP 50
35 #define XFRM_PROTO_AH 51
36 #define XFRM_PROTO_COMP 108
37 #define XFRM_PROTO_IPIP 4
38 #define XFRM_PROTO_IPV6 41
39 #define XFRM_PROTO_ROUTING IPPROTO_ROUTING
40 #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS
41
42 #define XFRM_ALIGN4(len) (((len) + 3) & ~3)
43 #define XFRM_ALIGN8(len) (((len) + 7) & ~7)
44 #define MODULE_ALIAS_XFRM_MODE(family, encap) \
45 MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap))
46 #define MODULE_ALIAS_XFRM_TYPE(family, proto) \
47 MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto))
48 #define MODULE_ALIAS_XFRM_OFFLOAD_TYPE(family, proto) \
49 MODULE_ALIAS("xfrm-offload-" __stringify(family) "-" __stringify(proto))
50
51 #ifdef CONFIG_XFRM_STATISTICS
52 #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field)
53 #else
54 #define XFRM_INC_STATS(net, field) ((void)(net))
55 #endif
56
57
58 /* Organization of SPD aka "XFRM rules"
59 ------------------------------------
60
61 Basic objects:
62 - policy rule, struct xfrm_policy (=SPD entry)
63 - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle)
64 - instance of a transformer, struct xfrm_state (=SA)
65 - template to clone xfrm_state, struct xfrm_tmpl
66
67 SPD is plain linear list of xfrm_policy rules, ordered by priority.
68 (To be compatible with existing pfkeyv2 implementations,
69 many rules with priority of 0x7fffffff are allowed to exist and
70 such rules are ordered in an unpredictable way, thanks to bsd folks.)
71
72 Lookup is plain linear search until the first match with selector.
73
74 If "action" is "block", then we prohibit the flow, otherwise:
75 if "xfrms_nr" is zero, the flow passes untransformed. Otherwise,
76 policy entry has list of up to XFRM_MAX_DEPTH transformations,
77 described by templates xfrm_tmpl. Each template is resolved
78 to a complete xfrm_state (see below) and we pack bundle of transformations
79 to a dst_entry returned to requestor.
80
81 dst -. xfrm .-> xfrm_state #1
82 |---. child .-> dst -. xfrm .-> xfrm_state #2
83 |---. child .-> dst -. xfrm .-> xfrm_state #3
84 |---. child .-> NULL
85
86 Bundles are cached at xrfm_policy struct (field ->bundles).
87
88
89 Resolution of xrfm_tmpl
90 -----------------------
91 Template contains:
92 1. ->mode Mode: transport or tunnel
93 2. ->id.proto Protocol: AH/ESP/IPCOMP
94 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode.
95 Q: allow to resolve security gateway?
96 4. ->id.spi If not zero, static SPI.
97 5. ->saddr Local tunnel endpoint, ignored for transport mode.
98 6. ->algos List of allowed algos. Plain bitmask now.
99 Q: ealgos, aalgos, calgos. What a mess...
100 7. ->share Sharing mode.
101 Q: how to implement private sharing mode? To add struct sock* to
102 flow id?
103
104 Having this template we search through SAD searching for entries
105 with appropriate mode/proto/algo, permitted by selector.
106 If no appropriate entry found, it is requested from key manager.
107
108 PROBLEMS:
109 Q: How to find all the bundles referring to a physical path for
110 PMTU discovery? Seems, dst should contain list of all parents...
111 and enter to infinite locking hierarchy disaster.
112 No! It is easier, we will not search for them, let them find us.
113 We add genid to each dst plus pointer to genid of raw IP route,
114 pmtu disc will update pmtu on raw IP route and increase its genid.
115 dst_check() will see this for top level and trigger resyncing
116 metrics. Plus, it will be made via sk->sk_dst_cache. Solved.
117 */
118
119 struct xfrm_state_walk {
120 struct list_head all;
121 u8 state;
122 u8 dying;
123 u8 proto;
124 u32 seq;
125 struct xfrm_address_filter *filter;
126 };
127
128 struct xfrm_state_offload {
129 struct net_device *dev;
130 unsigned long offload_handle;
131 unsigned int num_exthdrs;
132 u8 flags;
133 };
134
135 struct xfrm_mode {
136 u8 encap;
137 u8 family;
138 u8 flags;
139 };
140
141 /* Flags for xfrm_mode. */
142 enum {
143 XFRM_MODE_FLAG_TUNNEL = 1,
144 };
145
146 /* Full description of state of transformer. */
147 struct xfrm_state {
148 possible_net_t xs_net;
149 union {
150 struct hlist_node gclist;
151 struct hlist_node bydst;
152 };
153 struct hlist_node bysrc;
154 struct hlist_node byspi;
155
156 refcount_t refcnt;
157 spinlock_t lock;
158
159 struct xfrm_id id;
160 struct xfrm_selector sel;
161 struct xfrm_mark mark;
162 u32 if_id;
163 u32 tfcpad;
164
165 u32 genid;
166
167 /* Key manager bits */
168 struct xfrm_state_walk km;
169
170 /* Parameters of this state. */
171 struct {
172 u32 reqid;
173 u8 mode;
174 u8 replay_window;
175 u8 aalgo, ealgo, calgo;
176 u8 flags;
177 u16 family;
178 xfrm_address_t saddr;
179 int header_len;
180 int trailer_len;
181 u32 extra_flags;
182 struct xfrm_mark smark;
183 } props;
184
185 struct xfrm_lifetime_cfg lft;
186
187 /* Data for transformer */
188 struct xfrm_algo_auth *aalg;
189 struct xfrm_algo *ealg;
190 struct xfrm_algo *calg;
191 struct xfrm_algo_aead *aead;
192 const char *geniv;
193
194 /* Data for encapsulator */
195 struct xfrm_encap_tmpl *encap;
196 struct sock __rcu *encap_sk;
197
198 /* Data for care-of address */
199 xfrm_address_t *coaddr;
200
201 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
202 struct xfrm_state *tunnel;
203
204 /* If a tunnel, number of users + 1 */
205 atomic_t tunnel_users;
206
207 /* State for replay detection */
208 struct xfrm_replay_state replay;
209 struct xfrm_replay_state_esn *replay_esn;
210
211 /* Replay detection state at the time we sent the last notification */
212 struct xfrm_replay_state preplay;
213 struct xfrm_replay_state_esn *preplay_esn;
214
215 /* The functions for replay detection. */
216 const struct xfrm_replay *repl;
217
218 /* internal flag that only holds state for delayed aevent at the
219 * moment
220 */
221 u32 xflags;
222
223 /* Replay detection notification settings */
224 u32 replay_maxage;
225 u32 replay_maxdiff;
226
227 /* Replay detection notification timer */
228 struct timer_list rtimer;
229
230 /* Statistics */
231 struct xfrm_stats stats;
232
233 struct xfrm_lifetime_cur curlft;
234 struct hrtimer mtimer;
235
236 struct xfrm_state_offload xso;
237
238 /* used to fix curlft->add_time when changing date */
239 long saved_tmo;
240
241 /* Last used time */
242 time64_t lastused;
243
244 struct page_frag xfrag;
245
246 /* Reference to data common to all the instances of this
247 * transformer. */
248 const struct xfrm_type *type;
249 struct xfrm_mode inner_mode;
250 struct xfrm_mode inner_mode_iaf;
251 struct xfrm_mode outer_mode;
252
253 const struct xfrm_type_offload *type_offload;
254
255 /* Security context */
256 struct xfrm_sec_ctx *security;
257
258 /* Private data of this transformer, format is opaque,
259 * interpreted by xfrm_type methods. */
260 void *data;
261 };
262
263 static inline struct net *xs_net(struct xfrm_state *x)
264 {
265 return read_pnet(&x->xs_net);
266 }
267
268 /* xflags - make enum if more show up */
269 #define XFRM_TIME_DEFER 1
270 #define XFRM_SOFT_EXPIRE 2
271
272 enum {
273 XFRM_STATE_VOID,
274 XFRM_STATE_ACQ,
275 XFRM_STATE_VALID,
276 XFRM_STATE_ERROR,
277 XFRM_STATE_EXPIRED,
278 XFRM_STATE_DEAD
279 };
280
281 /* callback structure passed from either netlink or pfkey */
282 struct km_event {
283 union {
284 u32 hard;
285 u32 proto;
286 u32 byid;
287 u32 aevent;
288 u32 type;
289 } data;
290
291 u32 seq;
292 u32 portid;
293 u32 event;
294 struct net *net;
295 };
296
297 struct xfrm_replay {
298 void (*advance)(struct xfrm_state *x, __be32 net_seq);
299 int (*check)(struct xfrm_state *x,
300 struct sk_buff *skb,
301 __be32 net_seq);
302 int (*recheck)(struct xfrm_state *x,
303 struct sk_buff *skb,
304 __be32 net_seq);
305 void (*notify)(struct xfrm_state *x, int event);
306 int (*overflow)(struct xfrm_state *x, struct sk_buff *skb);
307 };
308
309 struct xfrm_if_cb {
310 struct xfrm_if *(*decode_session)(struct sk_buff *skb,
311 unsigned short family);
312 };
313
314 void xfrm_if_register_cb(const struct xfrm_if_cb *ifcb);
315 void xfrm_if_unregister_cb(void);
316
317 struct net_device;
318 struct xfrm_type;
319 struct xfrm_dst;
320 struct xfrm_policy_afinfo {
321 struct dst_ops *dst_ops;
322 struct dst_entry *(*dst_lookup)(struct net *net,
323 int tos, int oif,
324 const xfrm_address_t *saddr,
325 const xfrm_address_t *daddr,
326 u32 mark);
327 int (*get_saddr)(struct net *net, int oif,
328 xfrm_address_t *saddr,
329 xfrm_address_t *daddr,
330 u32 mark);
331 int (*fill_dst)(struct xfrm_dst *xdst,
332 struct net_device *dev,
333 const struct flowi *fl);
334 struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig);
335 };
336
337 int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo *afinfo, int family);
338 void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo *afinfo);
339 void km_policy_notify(struct xfrm_policy *xp, int dir,
340 const struct km_event *c);
341 void km_state_notify(struct xfrm_state *x, const struct km_event *c);
342
343 struct xfrm_tmpl;
344 int km_query(struct xfrm_state *x, struct xfrm_tmpl *t,
345 struct xfrm_policy *pol);
346 void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
347 int __xfrm_state_delete(struct xfrm_state *x);
348
349 struct xfrm_state_afinfo {
350 u8 family;
351 u8 proto;
352
353 const struct xfrm_type_offload *type_offload_esp;
354
355 const struct xfrm_type *type_esp;
356 const struct xfrm_type *type_ipip;
357 const struct xfrm_type *type_ipip6;
358 const struct xfrm_type *type_comp;
359 const struct xfrm_type *type_ah;
360 const struct xfrm_type *type_routing;
361 const struct xfrm_type *type_dstopts;
362
363 int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb);
364 int (*output_finish)(struct sock *sk, struct sk_buff *skb);
365 int (*extract_input)(struct xfrm_state *x,
366 struct sk_buff *skb);
367 int (*extract_output)(struct xfrm_state *x,
368 struct sk_buff *skb);
369 int (*transport_finish)(struct sk_buff *skb,
370 int async);
371 void (*local_error)(struct sk_buff *skb, u32 mtu);
372 };
373
374 int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
375 int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
376 struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
377 struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family);
378
379 struct xfrm_input_afinfo {
380 unsigned int family;
381 int (*callback)(struct sk_buff *skb, u8 protocol,
382 int err);
383 };
384
385 int xfrm_input_register_afinfo(const struct xfrm_input_afinfo *afinfo);
386 int xfrm_input_unregister_afinfo(const struct xfrm_input_afinfo *afinfo);
387
388 void xfrm_flush_gc(void);
389 void xfrm_state_delete_tunnel(struct xfrm_state *x);
390
391 struct xfrm_type {
392 char *description;
393 struct module *owner;
394 u8 proto;
395 u8 flags;
396 #define XFRM_TYPE_NON_FRAGMENT 1
397 #define XFRM_TYPE_REPLAY_PROT 2
398 #define XFRM_TYPE_LOCAL_COADDR 4
399 #define XFRM_TYPE_REMOTE_COADDR 8
400
401 int (*init_state)(struct xfrm_state *x);
402 void (*destructor)(struct xfrm_state *);
403 int (*input)(struct xfrm_state *, struct sk_buff *skb);
404 int (*output)(struct xfrm_state *, struct sk_buff *pskb);
405 int (*reject)(struct xfrm_state *, struct sk_buff *,
406 const struct flowi *);
407 int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **);
408 };
409
410 int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
411 void xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
412
413 struct xfrm_type_offload {
414 char *description;
415 struct module *owner;
416 u8 proto;
417 void (*encap)(struct xfrm_state *, struct sk_buff *pskb);
418 int (*input_tail)(struct xfrm_state *x, struct sk_buff *skb);
419 int (*xmit)(struct xfrm_state *, struct sk_buff *pskb, netdev_features_t features);
420 };
421
422 int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned short family);
423 void xfrm_unregister_type_offload(const struct xfrm_type_offload *type, unsigned short family);
424
425 static inline int xfrm_af2proto(unsigned int family)
426 {
427 switch(family) {
428 case AF_INET:
429 return IPPROTO_IPIP;
430 case AF_INET6:
431 return IPPROTO_IPV6;
432 default:
433 return 0;
434 }
435 }
436
437 static inline const struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
438 {
439 if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
440 (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
441 return &x->inner_mode;
442 else
443 return &x->inner_mode_iaf;
444 }
445
446 struct xfrm_tmpl {
447 /* id in template is interpreted as:
448 * daddr - destination of tunnel, may be zero for transport mode.
449 * spi - zero to acquire spi. Not zero if spi is static, then
450 * daddr must be fixed too.
451 * proto - AH/ESP/IPCOMP
452 */
453 struct xfrm_id id;
454
455 /* Source address of tunnel. Ignored, if it is not a tunnel. */
456 xfrm_address_t saddr;
457
458 unsigned short encap_family;
459
460 u32 reqid;
461
462 /* Mode: transport, tunnel etc. */
463 u8 mode;
464
465 /* Sharing mode: unique, this session only, this user only etc. */
466 u8 share;
467
468 /* May skip this transfomration if no SA is found */
469 u8 optional;
470
471 /* Skip aalgos/ealgos/calgos checks. */
472 u8 allalgs;
473
474 /* Bit mask of algos allowed for acquisition */
475 u32 aalgos;
476 u32 ealgos;
477 u32 calgos;
478 };
479
480 #define XFRM_MAX_DEPTH 6
481 #define XFRM_MAX_OFFLOAD_DEPTH 1
482
483 struct xfrm_policy_walk_entry {
484 struct list_head all;
485 u8 dead;
486 };
487
488 struct xfrm_policy_walk {
489 struct xfrm_policy_walk_entry walk;
490 u8 type;
491 u32 seq;
492 };
493
494 struct xfrm_policy_queue {
495 struct sk_buff_head hold_queue;
496 struct timer_list hold_timer;
497 unsigned long timeout;
498 };
499
500 struct xfrm_policy {
501 possible_net_t xp_net;
502 struct hlist_node bydst;
503 struct hlist_node byidx;
504
505 /* This lock only affects elements except for entry. */
506 rwlock_t lock;
507 refcount_t refcnt;
508 u32 pos;
509 struct timer_list timer;
510
511 atomic_t genid;
512 u32 priority;
513 u32 index;
514 u32 if_id;
515 struct xfrm_mark mark;
516 struct xfrm_selector selector;
517 struct xfrm_lifetime_cfg lft;
518 struct xfrm_lifetime_cur curlft;
519 struct xfrm_policy_walk_entry walk;
520 struct xfrm_policy_queue polq;
521 bool bydst_reinsert;
522 u8 type;
523 u8 action;
524 u8 flags;
525 u8 xfrm_nr;
526 u16 family;
527 struct xfrm_sec_ctx *security;
528 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
529 struct hlist_node bydst_inexact_list;
530 struct rcu_head rcu;
531 };
532
533 static inline struct net *xp_net(const struct xfrm_policy *xp)
534 {
535 return read_pnet(&xp->xp_net);
536 }
537
538 struct xfrm_kmaddress {
539 xfrm_address_t local;
540 xfrm_address_t remote;
541 u32 reserved;
542 u16 family;
543 };
544
545 struct xfrm_migrate {
546 xfrm_address_t old_daddr;
547 xfrm_address_t old_saddr;
548 xfrm_address_t new_daddr;
549 xfrm_address_t new_saddr;
550 u8 proto;
551 u8 mode;
552 u16 reserved;
553 u32 reqid;
554 u16 old_family;
555 u16 new_family;
556 };
557
558 #define XFRM_KM_TIMEOUT 30
559 /* what happened */
560 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
561 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
562
563 /* default aevent timeout in units of 100ms */
564 #define XFRM_AE_ETIME 10
565 /* Async Event timer multiplier */
566 #define XFRM_AE_ETH_M 10
567 /* default seq threshold size */
568 #define XFRM_AE_SEQT_SIZE 2
569
570 struct xfrm_mgr {
571 struct list_head list;
572 int (*notify)(struct xfrm_state *x, const struct km_event *c);
573 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp);
574 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
575 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
576 int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
577 int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
578 int (*migrate)(const struct xfrm_selector *sel,
579 u8 dir, u8 type,
580 const struct xfrm_migrate *m,
581 int num_bundles,
582 const struct xfrm_kmaddress *k,
583 const struct xfrm_encap_tmpl *encap);
584 bool (*is_alive)(const struct km_event *c);
585 };
586
587 int xfrm_register_km(struct xfrm_mgr *km);
588 int xfrm_unregister_km(struct xfrm_mgr *km);
589
590 struct xfrm_tunnel_skb_cb {
591 union {
592 struct inet_skb_parm h4;
593 struct inet6_skb_parm h6;
594 } header;
595
596 union {
597 struct ip_tunnel *ip4;
598 struct ip6_tnl *ip6;
599 } tunnel;
600 };
601
602 #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0]))
603
604 /*
605 * This structure is used for the duration where packets are being
606 * transformed by IPsec. As soon as the packet leaves IPsec the
607 * area beyond the generic IP part may be overwritten.
608 */
609 struct xfrm_skb_cb {
610 struct xfrm_tunnel_skb_cb header;
611
612 /* Sequence number for replay protection. */
613 union {
614 struct {
615 __u32 low;
616 __u32 hi;
617 } output;
618 struct {
619 __be32 low;
620 __be32 hi;
621 } input;
622 } seq;
623 };
624
625 #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
626
627 /*
628 * This structure is used by the afinfo prepare_input/prepare_output functions
629 * to transmit header information to the mode input/output functions.
630 */
631 struct xfrm_mode_skb_cb {
632 struct xfrm_tunnel_skb_cb header;
633
634 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
635 __be16 id;
636 __be16 frag_off;
637
638 /* IP header length (excluding options or extension headers). */
639 u8 ihl;
640
641 /* TOS for IPv4, class for IPv6. */
642 u8 tos;
643
644 /* TTL for IPv4, hop limitfor IPv6. */
645 u8 ttl;
646
647 /* Protocol for IPv4, NH for IPv6. */
648 u8 protocol;
649
650 /* Option length for IPv4, zero for IPv6. */
651 u8 optlen;
652
653 /* Used by IPv6 only, zero for IPv4. */
654 u8 flow_lbl[3];
655 };
656
657 #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
658
659 /*
660 * This structure is used by the input processing to locate the SPI and
661 * related information.
662 */
663 struct xfrm_spi_skb_cb {
664 struct xfrm_tunnel_skb_cb header;
665
666 unsigned int daddroff;
667 unsigned int family;
668 __be32 seq;
669 };
670
671 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
672
673 #ifdef CONFIG_AUDITSYSCALL
674 static inline struct audit_buffer *xfrm_audit_start(const char *op)
675 {
676 struct audit_buffer *audit_buf = NULL;
677
678 if (audit_enabled == AUDIT_OFF)
679 return NULL;
680 audit_buf = audit_log_start(audit_context(), GFP_ATOMIC,
681 AUDIT_MAC_IPSEC_EVENT);
682 if (audit_buf == NULL)
683 return NULL;
684 audit_log_format(audit_buf, "op=%s", op);
685 return audit_buf;
686 }
687
688 static inline void xfrm_audit_helper_usrinfo(bool task_valid,
689 struct audit_buffer *audit_buf)
690 {
691 const unsigned int auid = from_kuid(&init_user_ns, task_valid ?
692 audit_get_loginuid(current) :
693 INVALID_UID);
694 const unsigned int ses = task_valid ? audit_get_sessionid(current) :
695 AUDIT_SID_UNSET;
696
697 audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses);
698 audit_log_task_context(audit_buf);
699 }
700
701 void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid);
702 void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
703 bool task_valid);
704 void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid);
705 void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid);
706 void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
707 struct sk_buff *skb);
708 void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb,
709 __be32 net_seq);
710 void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
711 void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi,
712 __be32 net_seq);
713 void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb,
714 u8 proto);
715 #else
716
717 static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
718 bool task_valid)
719 {
720 }
721
722 static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
723 bool task_valid)
724 {
725 }
726
727 static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
728 bool task_valid)
729 {
730 }
731
732 static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
733 bool task_valid)
734 {
735 }
736
737 static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
738 struct sk_buff *skb)
739 {
740 }
741
742 static inline void xfrm_audit_state_replay(struct xfrm_state *x,
743 struct sk_buff *skb, __be32 net_seq)
744 {
745 }
746
747 static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
748 u16 family)
749 {
750 }
751
752 static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
753 __be32 net_spi, __be32 net_seq)
754 {
755 }
756
757 static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
758 struct sk_buff *skb, u8 proto)
759 {
760 }
761 #endif /* CONFIG_AUDITSYSCALL */
762
763 static inline void xfrm_pol_hold(struct xfrm_policy *policy)
764 {
765 if (likely(policy != NULL))
766 refcount_inc(&policy->refcnt);
767 }
768
769 void xfrm_policy_destroy(struct xfrm_policy *policy);
770
771 static inline void xfrm_pol_put(struct xfrm_policy *policy)
772 {
773 if (refcount_dec_and_test(&policy->refcnt))
774 xfrm_policy_destroy(policy);
775 }
776
777 static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
778 {
779 int i;
780 for (i = npols - 1; i >= 0; --i)
781 xfrm_pol_put(pols[i]);
782 }
783
784 void __xfrm_state_destroy(struct xfrm_state *, bool);
785
786 static inline void __xfrm_state_put(struct xfrm_state *x)
787 {
788 refcount_dec(&x->refcnt);
789 }
790
791 static inline void xfrm_state_put(struct xfrm_state *x)
792 {
793 if (refcount_dec_and_test(&x->refcnt))
794 __xfrm_state_destroy(x, false);
795 }
796
797 static inline void xfrm_state_put_sync(struct xfrm_state *x)
798 {
799 if (refcount_dec_and_test(&x->refcnt))
800 __xfrm_state_destroy(x, true);
801 }
802
803 static inline void xfrm_state_hold(struct xfrm_state *x)
804 {
805 refcount_inc(&x->refcnt);
806 }
807
808 static inline bool addr_match(const void *token1, const void *token2,
809 unsigned int prefixlen)
810 {
811 const __be32 *a1 = token1;
812 const __be32 *a2 = token2;
813 unsigned int pdw;
814 unsigned int pbi;
815
816 pdw = prefixlen >> 5; /* num of whole u32 in prefix */
817 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
818
819 if (pdw)
820 if (memcmp(a1, a2, pdw << 2))
821 return false;
822
823 if (pbi) {
824 __be32 mask;
825
826 mask = htonl((0xffffffff) << (32 - pbi));
827
828 if ((a1[pdw] ^ a2[pdw]) & mask)
829 return false;
830 }
831
832 return true;
833 }
834
835 static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
836 {
837 /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
838 if (sizeof(long) == 4 && prefixlen == 0)
839 return true;
840 return !((a1 ^ a2) & htonl(~0UL << (32 - prefixlen)));
841 }
842
843 static __inline__
844 __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
845 {
846 __be16 port;
847 switch(fl->flowi_proto) {
848 case IPPROTO_TCP:
849 case IPPROTO_UDP:
850 case IPPROTO_UDPLITE:
851 case IPPROTO_SCTP:
852 port = uli->ports.sport;
853 break;
854 case IPPROTO_ICMP:
855 case IPPROTO_ICMPV6:
856 port = htons(uli->icmpt.type);
857 break;
858 case IPPROTO_MH:
859 port = htons(uli->mht.type);
860 break;
861 case IPPROTO_GRE:
862 port = htons(ntohl(uli->gre_key) >> 16);
863 break;
864 default:
865 port = 0; /*XXX*/
866 }
867 return port;
868 }
869
870 static __inline__
871 __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
872 {
873 __be16 port;
874 switch(fl->flowi_proto) {
875 case IPPROTO_TCP:
876 case IPPROTO_UDP:
877 case IPPROTO_UDPLITE:
878 case IPPROTO_SCTP:
879 port = uli->ports.dport;
880 break;
881 case IPPROTO_ICMP:
882 case IPPROTO_ICMPV6:
883 port = htons(uli->icmpt.code);
884 break;
885 case IPPROTO_GRE:
886 port = htons(ntohl(uli->gre_key) & 0xffff);
887 break;
888 default:
889 port = 0; /*XXX*/
890 }
891 return port;
892 }
893
894 bool xfrm_selector_match(const struct xfrm_selector *sel,
895 const struct flowi *fl, unsigned short family);
896
897 #ifdef CONFIG_SECURITY_NETWORK_XFRM
898 /* If neither has a context --> match
899 * Otherwise, both must have a context and the sids, doi, alg must match
900 */
901 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
902 {
903 return ((!s1 && !s2) ||
904 (s1 && s2 &&
905 (s1->ctx_sid == s2->ctx_sid) &&
906 (s1->ctx_doi == s2->ctx_doi) &&
907 (s1->ctx_alg == s2->ctx_alg)));
908 }
909 #else
910 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
911 {
912 return true;
913 }
914 #endif
915
916 /* A struct encoding bundle of transformations to apply to some set of flow.
917 *
918 * xdst->child points to the next element of bundle.
919 * dst->xfrm points to an instanse of transformer.
920 *
921 * Due to unfortunate limitations of current routing cache, which we
922 * have no time to fix, it mirrors struct rtable and bound to the same
923 * routing key, including saddr,daddr. However, we can have many of
924 * bundles differing by session id. All the bundles grow from a parent
925 * policy rule.
926 */
927 struct xfrm_dst {
928 union {
929 struct dst_entry dst;
930 struct rtable rt;
931 struct rt6_info rt6;
932 } u;
933 struct dst_entry *route;
934 struct dst_entry *child;
935 struct dst_entry *path;
936 struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
937 int num_pols, num_xfrms;
938 u32 xfrm_genid;
939 u32 policy_genid;
940 u32 route_mtu_cached;
941 u32 child_mtu_cached;
942 u32 route_cookie;
943 u32 path_cookie;
944 };
945
946 static inline struct dst_entry *xfrm_dst_path(const struct dst_entry *dst)
947 {
948 #ifdef CONFIG_XFRM
949 if (dst->xfrm) {
950 const struct xfrm_dst *xdst = (const struct xfrm_dst *) dst;
951
952 return xdst->path;
953 }
954 #endif
955 return (struct dst_entry *) dst;
956 }
957
958 static inline struct dst_entry *xfrm_dst_child(const struct dst_entry *dst)
959 {
960 #ifdef CONFIG_XFRM
961 if (dst->xfrm) {
962 struct xfrm_dst *xdst = (struct xfrm_dst *) dst;
963 return xdst->child;
964 }
965 #endif
966 return NULL;
967 }
968
969 #ifdef CONFIG_XFRM
970 static inline void xfrm_dst_set_child(struct xfrm_dst *xdst, struct dst_entry *child)
971 {
972 xdst->child = child;
973 }
974
975 static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
976 {
977 xfrm_pols_put(xdst->pols, xdst->num_pols);
978 dst_release(xdst->route);
979 if (likely(xdst->u.dst.xfrm))
980 xfrm_state_put(xdst->u.dst.xfrm);
981 }
982 #endif
983
984 void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
985
986 struct xfrm_if_parms {
987 int link; /* ifindex of underlying L2 interface */
988 u32 if_id; /* interface identifyer */
989 };
990
991 struct xfrm_if {
992 struct xfrm_if __rcu *next; /* next interface in list */
993 struct net_device *dev; /* virtual device associated with interface */
994 struct net *net; /* netns for packet i/o */
995 struct xfrm_if_parms p; /* interface parms */
996
997 struct gro_cells gro_cells;
998 };
999
1000 struct xfrm_offload {
1001 /* Output sequence number for replay protection on offloading. */
1002 struct {
1003 __u32 low;
1004 __u32 hi;
1005 } seq;
1006
1007 __u32 flags;
1008 #define SA_DELETE_REQ 1
1009 #define CRYPTO_DONE 2
1010 #define CRYPTO_NEXT_DONE 4
1011 #define CRYPTO_FALLBACK 8
1012 #define XFRM_GSO_SEGMENT 16
1013 #define XFRM_GRO 32
1014 #define XFRM_ESP_NO_TRAILER 64
1015 #define XFRM_DEV_RESUME 128
1016
1017 __u32 status;
1018 #define CRYPTO_SUCCESS 1
1019 #define CRYPTO_GENERIC_ERROR 2
1020 #define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4
1021 #define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8
1022 #define CRYPTO_TUNNEL_AH_AUTH_FAILED 16
1023 #define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32
1024 #define CRYPTO_INVALID_PACKET_SYNTAX 64
1025 #define CRYPTO_INVALID_PROTOCOL 128
1026
1027 __u8 proto;
1028 };
1029
1030 struct sec_path {
1031 int len;
1032 int olen;
1033
1034 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
1035 struct xfrm_offload ovec[XFRM_MAX_OFFLOAD_DEPTH];
1036 };
1037
1038 struct sec_path *secpath_set(struct sk_buff *skb);
1039
1040 static inline void
1041 secpath_reset(struct sk_buff *skb)
1042 {
1043 #ifdef CONFIG_XFRM
1044 skb_ext_del(skb, SKB_EXT_SEC_PATH);
1045 #endif
1046 }
1047
1048 static inline int
1049 xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
1050 {
1051 switch (family) {
1052 case AF_INET:
1053 return addr->a4 == 0;
1054 case AF_INET6:
1055 return ipv6_addr_any(&addr->in6);
1056 }
1057 return 0;
1058 }
1059
1060 static inline int
1061 __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1062 {
1063 return (tmpl->saddr.a4 &&
1064 tmpl->saddr.a4 != x->props.saddr.a4);
1065 }
1066
1067 static inline int
1068 __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1069 {
1070 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
1071 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
1072 }
1073
1074 static inline int
1075 xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
1076 {
1077 switch (family) {
1078 case AF_INET:
1079 return __xfrm4_state_addr_cmp(tmpl, x);
1080 case AF_INET6:
1081 return __xfrm6_state_addr_cmp(tmpl, x);
1082 }
1083 return !0;
1084 }
1085
1086 #ifdef CONFIG_XFRM
1087 int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb,
1088 unsigned short family);
1089
1090 static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1091 struct sk_buff *skb,
1092 unsigned int family, int reverse)
1093 {
1094 struct net *net = dev_net(skb->dev);
1095 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1096
1097 if (sk && sk->sk_policy[XFRM_POLICY_IN])
1098 return __xfrm_policy_check(sk, ndir, skb, family);
1099
1100 return (!net->xfrm.policy_count[dir] && !secpath_exists(skb)) ||
1101 (skb_dst(skb)->flags & DST_NOPOLICY) ||
1102 __xfrm_policy_check(sk, ndir, skb, family);
1103 }
1104
1105 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1106 {
1107 return __xfrm_policy_check2(sk, dir, skb, family, 0);
1108 }
1109
1110 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1111 {
1112 return xfrm_policy_check(sk, dir, skb, AF_INET);
1113 }
1114
1115 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1116 {
1117 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1118 }
1119
1120 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1121 struct sk_buff *skb)
1122 {
1123 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1124 }
1125
1126 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1127 struct sk_buff *skb)
1128 {
1129 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1130 }
1131
1132 int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1133 unsigned int family, int reverse);
1134
1135 static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1136 unsigned int family)
1137 {
1138 return __xfrm_decode_session(skb, fl, family, 0);
1139 }
1140
1141 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1142 struct flowi *fl,
1143 unsigned int family)
1144 {
1145 return __xfrm_decode_session(skb, fl, family, 1);
1146 }
1147
1148 int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1149
1150 static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1151 {
1152 struct net *net = dev_net(skb->dev);
1153
1154 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
1155 (skb_dst(skb)->flags & DST_NOXFRM) ||
1156 __xfrm_route_forward(skb, family);
1157 }
1158
1159 static inline int xfrm4_route_forward(struct sk_buff *skb)
1160 {
1161 return xfrm_route_forward(skb, AF_INET);
1162 }
1163
1164 static inline int xfrm6_route_forward(struct sk_buff *skb)
1165 {
1166 return xfrm_route_forward(skb, AF_INET6);
1167 }
1168
1169 int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk);
1170
1171 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk)
1172 {
1173 sk->sk_policy[0] = NULL;
1174 sk->sk_policy[1] = NULL;
1175 if (unlikely(osk->sk_policy[0] || osk->sk_policy[1]))
1176 return __xfrm_sk_clone_policy(sk, osk);
1177 return 0;
1178 }
1179
1180 int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
1181
1182 static inline void xfrm_sk_free_policy(struct sock *sk)
1183 {
1184 struct xfrm_policy *pol;
1185
1186 pol = rcu_dereference_protected(sk->sk_policy[0], 1);
1187 if (unlikely(pol != NULL)) {
1188 xfrm_policy_delete(pol, XFRM_POLICY_MAX);
1189 sk->sk_policy[0] = NULL;
1190 }
1191 pol = rcu_dereference_protected(sk->sk_policy[1], 1);
1192 if (unlikely(pol != NULL)) {
1193 xfrm_policy_delete(pol, XFRM_POLICY_MAX+1);
1194 sk->sk_policy[1] = NULL;
1195 }
1196 }
1197
1198 #else
1199
1200 static inline void xfrm_sk_free_policy(struct sock *sk) {}
1201 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; }
1202 static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1203 static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1204 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1205 {
1206 return 1;
1207 }
1208 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1209 {
1210 return 1;
1211 }
1212 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1213 {
1214 return 1;
1215 }
1216 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1217 struct flowi *fl,
1218 unsigned int family)
1219 {
1220 return -ENOSYS;
1221 }
1222 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1223 struct sk_buff *skb)
1224 {
1225 return 1;
1226 }
1227 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1228 struct sk_buff *skb)
1229 {
1230 return 1;
1231 }
1232 #endif
1233
1234 static __inline__
1235 xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
1236 {
1237 switch (family){
1238 case AF_INET:
1239 return (xfrm_address_t *)&fl->u.ip4.daddr;
1240 case AF_INET6:
1241 return (xfrm_address_t *)&fl->u.ip6.daddr;
1242 }
1243 return NULL;
1244 }
1245
1246 static __inline__
1247 xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
1248 {
1249 switch (family){
1250 case AF_INET:
1251 return (xfrm_address_t *)&fl->u.ip4.saddr;
1252 case AF_INET6:
1253 return (xfrm_address_t *)&fl->u.ip6.saddr;
1254 }
1255 return NULL;
1256 }
1257
1258 static __inline__
1259 void xfrm_flowi_addr_get(const struct flowi *fl,
1260 xfrm_address_t *saddr, xfrm_address_t *daddr,
1261 unsigned short family)
1262 {
1263 switch(family) {
1264 case AF_INET:
1265 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1266 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
1267 break;
1268 case AF_INET6:
1269 saddr->in6 = fl->u.ip6.saddr;
1270 daddr->in6 = fl->u.ip6.daddr;
1271 break;
1272 }
1273 }
1274
1275 static __inline__ int
1276 __xfrm4_state_addr_check(const struct xfrm_state *x,
1277 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1278 {
1279 if (daddr->a4 == x->id.daddr.a4 &&
1280 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1281 return 1;
1282 return 0;
1283 }
1284
1285 static __inline__ int
1286 __xfrm6_state_addr_check(const struct xfrm_state *x,
1287 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1288 {
1289 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1290 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
1291 ipv6_addr_any((struct in6_addr *)saddr) ||
1292 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1293 return 1;
1294 return 0;
1295 }
1296
1297 static __inline__ int
1298 xfrm_state_addr_check(const struct xfrm_state *x,
1299 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1300 unsigned short family)
1301 {
1302 switch (family) {
1303 case AF_INET:
1304 return __xfrm4_state_addr_check(x, daddr, saddr);
1305 case AF_INET6:
1306 return __xfrm6_state_addr_check(x, daddr, saddr);
1307 }
1308 return 0;
1309 }
1310
1311 static __inline__ int
1312 xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
1313 unsigned short family)
1314 {
1315 switch (family) {
1316 case AF_INET:
1317 return __xfrm4_state_addr_check(x,
1318 (const xfrm_address_t *)&fl->u.ip4.daddr,
1319 (const xfrm_address_t *)&fl->u.ip4.saddr);
1320 case AF_INET6:
1321 return __xfrm6_state_addr_check(x,
1322 (const xfrm_address_t *)&fl->u.ip6.daddr,
1323 (const xfrm_address_t *)&fl->u.ip6.saddr);
1324 }
1325 return 0;
1326 }
1327
1328 static inline int xfrm_state_kern(const struct xfrm_state *x)
1329 {
1330 return atomic_read(&x->tunnel_users);
1331 }
1332
1333 static inline bool xfrm_id_proto_valid(u8 proto)
1334 {
1335 switch (proto) {
1336 case IPPROTO_AH:
1337 case IPPROTO_ESP:
1338 case IPPROTO_COMP:
1339 #if IS_ENABLED(CONFIG_IPV6)
1340 case IPPROTO_ROUTING:
1341 case IPPROTO_DSTOPTS:
1342 #endif
1343 return true;
1344 default:
1345 return false;
1346 }
1347 }
1348
1349 /* IPSEC_PROTO_ANY only matches 3 IPsec protocols, 0 could match all. */
1350 static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1351 {
1352 return (!userproto || proto == userproto ||
1353 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1354 proto == IPPROTO_ESP ||
1355 proto == IPPROTO_COMP)));
1356 }
1357
1358 /*
1359 * xfrm algorithm information
1360 */
1361 struct xfrm_algo_aead_info {
1362 char *geniv;
1363 u16 icv_truncbits;
1364 };
1365
1366 struct xfrm_algo_auth_info {
1367 u16 icv_truncbits;
1368 u16 icv_fullbits;
1369 };
1370
1371 struct xfrm_algo_encr_info {
1372 char *geniv;
1373 u16 blockbits;
1374 u16 defkeybits;
1375 };
1376
1377 struct xfrm_algo_comp_info {
1378 u16 threshold;
1379 };
1380
1381 struct xfrm_algo_desc {
1382 char *name;
1383 char *compat;
1384 u8 available:1;
1385 u8 pfkey_supported:1;
1386 union {
1387 struct xfrm_algo_aead_info aead;
1388 struct xfrm_algo_auth_info auth;
1389 struct xfrm_algo_encr_info encr;
1390 struct xfrm_algo_comp_info comp;
1391 } uinfo;
1392 struct sadb_alg desc;
1393 };
1394
1395 /* XFRM protocol handlers. */
1396 struct xfrm4_protocol {
1397 int (*handler)(struct sk_buff *skb);
1398 int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
1399 int encap_type);
1400 int (*cb_handler)(struct sk_buff *skb, int err);
1401 int (*err_handler)(struct sk_buff *skb, u32 info);
1402
1403 struct xfrm4_protocol __rcu *next;
1404 int priority;
1405 };
1406
1407 struct xfrm6_protocol {
1408 int (*handler)(struct sk_buff *skb);
1409 int (*cb_handler)(struct sk_buff *skb, int err);
1410 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1411 u8 type, u8 code, int offset, __be32 info);
1412
1413 struct xfrm6_protocol __rcu *next;
1414 int priority;
1415 };
1416
1417 /* XFRM tunnel handlers. */
1418 struct xfrm_tunnel {
1419 int (*handler)(struct sk_buff *skb);
1420 int (*err_handler)(struct sk_buff *skb, u32 info);
1421
1422 struct xfrm_tunnel __rcu *next;
1423 int priority;
1424 };
1425
1426 struct xfrm6_tunnel {
1427 int (*handler)(struct sk_buff *skb);
1428 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1429 u8 type, u8 code, int offset, __be32 info);
1430 struct xfrm6_tunnel __rcu *next;
1431 int priority;
1432 };
1433
1434 void xfrm_init(void);
1435 void xfrm4_init(void);
1436 int xfrm_state_init(struct net *net);
1437 void xfrm_state_fini(struct net *net);
1438 void xfrm4_state_init(void);
1439 void xfrm4_protocol_init(void);
1440 #ifdef CONFIG_XFRM
1441 int xfrm6_init(void);
1442 void xfrm6_fini(void);
1443 int xfrm6_state_init(void);
1444 void xfrm6_state_fini(void);
1445 int xfrm6_protocol_init(void);
1446 void xfrm6_protocol_fini(void);
1447 #else
1448 static inline int xfrm6_init(void)
1449 {
1450 return 0;
1451 }
1452 static inline void xfrm6_fini(void)
1453 {
1454 ;
1455 }
1456 #endif
1457
1458 #ifdef CONFIG_XFRM_STATISTICS
1459 int xfrm_proc_init(struct net *net);
1460 void xfrm_proc_fini(struct net *net);
1461 #endif
1462
1463 int xfrm_sysctl_init(struct net *net);
1464 #ifdef CONFIG_SYSCTL
1465 void xfrm_sysctl_fini(struct net *net);
1466 #else
1467 static inline void xfrm_sysctl_fini(struct net *net)
1468 {
1469 }
1470 #endif
1471
1472 void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
1473 struct xfrm_address_filter *filter);
1474 int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1475 int (*func)(struct xfrm_state *, int, void*), void *);
1476 void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net);
1477 struct xfrm_state *xfrm_state_alloc(struct net *net);
1478 void xfrm_state_free(struct xfrm_state *x);
1479 struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1480 const xfrm_address_t *saddr,
1481 const struct flowi *fl,
1482 struct xfrm_tmpl *tmpl,
1483 struct xfrm_policy *pol, int *err,
1484 unsigned short family, u32 if_id);
1485 struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, u32 if_id,
1486 xfrm_address_t *daddr,
1487 xfrm_address_t *saddr,
1488 unsigned short family,
1489 u8 mode, u8 proto, u32 reqid);
1490 struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
1491 unsigned short family);
1492 int xfrm_state_check_expire(struct xfrm_state *x);
1493 void xfrm_state_insert(struct xfrm_state *x);
1494 int xfrm_state_add(struct xfrm_state *x);
1495 int xfrm_state_update(struct xfrm_state *x);
1496 struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1497 const xfrm_address_t *daddr, __be32 spi,
1498 u8 proto, unsigned short family);
1499 struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1500 const xfrm_address_t *daddr,
1501 const xfrm_address_t *saddr,
1502 u8 proto,
1503 unsigned short family);
1504 #ifdef CONFIG_XFRM_SUB_POLICY
1505 void xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1506 unsigned short family);
1507 void xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1508 unsigned short family);
1509 #else
1510 static inline void xfrm_tmpl_sort(struct xfrm_tmpl **d, struct xfrm_tmpl **s,
1511 int n, unsigned short family)
1512 {
1513 }
1514
1515 static inline void xfrm_state_sort(struct xfrm_state **d, struct xfrm_state **s,
1516 int n, unsigned short family)
1517 {
1518 }
1519 #endif
1520
1521 struct xfrmk_sadinfo {
1522 u32 sadhcnt; /* current hash bkts */
1523 u32 sadhmcnt; /* max allowed hash bkts */
1524 u32 sadcnt; /* current running count */
1525 };
1526
1527 struct xfrmk_spdinfo {
1528 u32 incnt;
1529 u32 outcnt;
1530 u32 fwdcnt;
1531 u32 inscnt;
1532 u32 outscnt;
1533 u32 fwdscnt;
1534 u32 spdhcnt;
1535 u32 spdhmcnt;
1536 };
1537
1538 struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1539 int xfrm_state_delete(struct xfrm_state *x);
1540 int xfrm_state_flush(struct net *net, u8 proto, bool task_valid, bool sync);
1541 int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid);
1542 void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1543 void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1544 u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1545 int xfrm_init_replay(struct xfrm_state *x);
1546 u32 xfrm_state_mtu(struct xfrm_state *x, int mtu);
1547 int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload);
1548 int xfrm_init_state(struct xfrm_state *x);
1549 int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
1550 int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
1551 int xfrm_trans_queue_net(struct net *net, struct sk_buff *skb,
1552 int (*finish)(struct net *, struct sock *,
1553 struct sk_buff *));
1554 int xfrm_trans_queue(struct sk_buff *skb,
1555 int (*finish)(struct net *, struct sock *,
1556 struct sk_buff *));
1557 int xfrm_output_resume(struct sk_buff *skb, int err);
1558 int xfrm_output(struct sock *sk, struct sk_buff *skb);
1559
1560 #if IS_ENABLED(CONFIG_NET_PKTGEN)
1561 int pktgen_xfrm_outer_mode_output(struct xfrm_state *x, struct sk_buff *skb);
1562 #endif
1563
1564 void xfrm_local_error(struct sk_buff *skb, int mtu);
1565 int xfrm4_extract_header(struct sk_buff *skb);
1566 int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1567 int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1568 int encap_type);
1569 int xfrm4_transport_finish(struct sk_buff *skb, int async);
1570 int xfrm4_rcv(struct sk_buff *skb);
1571 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1572
1573 static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1574 {
1575 XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
1576 XFRM_SPI_SKB_CB(skb)->family = AF_INET;
1577 XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
1578 return xfrm_input(skb, nexthdr, spi, 0);
1579 }
1580
1581 int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1582 int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1583 int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb);
1584 int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol);
1585 int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol);
1586 int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1587 int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
1588 void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
1589 int xfrm6_extract_header(struct sk_buff *skb);
1590 int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1591 int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi,
1592 struct ip6_tnl *t);
1593 int xfrm6_transport_finish(struct sk_buff *skb, int async);
1594 int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t);
1595 int xfrm6_rcv(struct sk_buff *skb);
1596 int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1597 xfrm_address_t *saddr, u8 proto);
1598 void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
1599 int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol);
1600 int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol);
1601 int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1602 int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
1603 __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1604 __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1605 int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1606 int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1607 int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb);
1608 int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1609 u8 **prevhdr);
1610
1611 #ifdef CONFIG_XFRM
1612 int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1613 int xfrm_user_policy(struct sock *sk, int optname,
1614 u8 __user *optval, int optlen);
1615 #else
1616 static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1617 {
1618 return -ENOPROTOOPT;
1619 }
1620 #endif
1621
1622 struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif,
1623 const xfrm_address_t *saddr,
1624 const xfrm_address_t *daddr,
1625 int family, u32 mark);
1626
1627 struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
1628
1629 void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1630 int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1631 int (*func)(struct xfrm_policy *, int, int, void*),
1632 void *);
1633 void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net);
1634 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
1635 struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, u32 if_id,
1636 u8 type, int dir,
1637 struct xfrm_selector *sel,
1638 struct xfrm_sec_ctx *ctx, int delete,
1639 int *err);
1640 struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u32 if_id, u8,
1641 int dir, u32 id, int delete, int *err);
1642 int xfrm_policy_flush(struct net *net, u8 type, bool task_valid);
1643 void xfrm_policy_hash_rebuild(struct net *net);
1644 u32 xfrm_get_acqseq(void);
1645 int verify_spi_info(u8 proto, u32 min, u32 max);
1646 int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
1647 struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark,
1648 u8 mode, u32 reqid, u32 if_id, u8 proto,
1649 const xfrm_address_t *daddr,
1650 const xfrm_address_t *saddr, int create,
1651 unsigned short family);
1652 int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
1653
1654 #ifdef CONFIG_XFRM_MIGRATE
1655 int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1656 const struct xfrm_migrate *m, int num_bundles,
1657 const struct xfrm_kmaddress *k,
1658 const struct xfrm_encap_tmpl *encap);
1659 struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net);
1660 struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
1661 struct xfrm_migrate *m,
1662 struct xfrm_encap_tmpl *encap);
1663 int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1664 struct xfrm_migrate *m, int num_bundles,
1665 struct xfrm_kmaddress *k, struct net *net,
1666 struct xfrm_encap_tmpl *encap);
1667 #endif
1668
1669 int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1670 void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1671 int km_report(struct net *net, u8 proto, struct xfrm_selector *sel,
1672 xfrm_address_t *addr);
1673
1674 void xfrm_input_init(void);
1675 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1676
1677 void xfrm_probe_algs(void);
1678 int xfrm_count_pfkey_auth_supported(void);
1679 int xfrm_count_pfkey_enc_supported(void);
1680 struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1681 struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1682 struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1683 struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1684 struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1685 struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1686 struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1687 struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1688 struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1689 int probe);
1690
1691 static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1692 const xfrm_address_t *b)
1693 {
1694 return ipv6_addr_equal((const struct in6_addr *)a,
1695 (const struct in6_addr *)b);
1696 }
1697
1698 static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1699 const xfrm_address_t *b,
1700 sa_family_t family)
1701 {
1702 switch (family) {
1703 default:
1704 case AF_INET:
1705 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1706 case AF_INET6:
1707 return xfrm6_addr_equal(a, b);
1708 }
1709 }
1710
1711 static inline int xfrm_policy_id2dir(u32 index)
1712 {
1713 return index & 7;
1714 }
1715
1716 #ifdef CONFIG_XFRM
1717 static inline int xfrm_aevent_is_on(struct net *net)
1718 {
1719 struct sock *nlsk;
1720 int ret = 0;
1721
1722 rcu_read_lock();
1723 nlsk = rcu_dereference(net->xfrm.nlsk);
1724 if (nlsk)
1725 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1726 rcu_read_unlock();
1727 return ret;
1728 }
1729
1730 static inline int xfrm_acquire_is_on(struct net *net)
1731 {
1732 struct sock *nlsk;
1733 int ret = 0;
1734
1735 rcu_read_lock();
1736 nlsk = rcu_dereference(net->xfrm.nlsk);
1737 if (nlsk)
1738 ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE);
1739 rcu_read_unlock();
1740
1741 return ret;
1742 }
1743 #endif
1744
1745 static inline unsigned int aead_len(struct xfrm_algo_aead *alg)
1746 {
1747 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1748 }
1749
1750 static inline unsigned int xfrm_alg_len(const struct xfrm_algo *alg)
1751 {
1752 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1753 }
1754
1755 static inline unsigned int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
1756 {
1757 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1758 }
1759
1760 static inline unsigned int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1761 {
1762 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1763 }
1764
1765 #ifdef CONFIG_XFRM_MIGRATE
1766 static inline int xfrm_replay_clone(struct xfrm_state *x,
1767 struct xfrm_state *orig)
1768 {
1769 x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
1770 GFP_KERNEL);
1771 if (!x->replay_esn)
1772 return -ENOMEM;
1773
1774 x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
1775 x->replay_esn->replay_window = orig->replay_esn->replay_window;
1776
1777 x->preplay_esn = kmemdup(x->replay_esn,
1778 xfrm_replay_state_esn_len(x->replay_esn),
1779 GFP_KERNEL);
1780 if (!x->preplay_esn) {
1781 kfree(x->replay_esn);
1782 return -ENOMEM;
1783 }
1784
1785 return 0;
1786 }
1787
1788 static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig)
1789 {
1790 return kmemdup(orig, aead_len(orig), GFP_KERNEL);
1791 }
1792
1793
1794 static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1795 {
1796 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
1797 }
1798
1799 static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1800 {
1801 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1802 }
1803
1804 static inline void xfrm_states_put(struct xfrm_state **states, int n)
1805 {
1806 int i;
1807 for (i = 0; i < n; i++)
1808 xfrm_state_put(*(states + i));
1809 }
1810
1811 static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1812 {
1813 int i;
1814 for (i = 0; i < n; i++)
1815 xfrm_state_delete(*(states + i));
1816 }
1817 #endif
1818
1819 #ifdef CONFIG_XFRM
1820 static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1821 {
1822 struct sec_path *sp = skb_sec_path(skb);
1823
1824 return sp->xvec[sp->len - 1];
1825 }
1826 #endif
1827
1828 static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb)
1829 {
1830 #ifdef CONFIG_XFRM
1831 struct sec_path *sp = skb_sec_path(skb);
1832
1833 if (!sp || !sp->olen || sp->len != sp->olen)
1834 return NULL;
1835
1836 return &sp->ovec[sp->olen - 1];
1837 #else
1838 return NULL;
1839 #endif
1840 }
1841
1842 void __init xfrm_dev_init(void);
1843
1844 #ifdef CONFIG_XFRM_OFFLOAD
1845 void xfrm_dev_resume(struct sk_buff *skb);
1846 void xfrm_dev_backlog(struct softnet_data *sd);
1847 struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again);
1848 int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
1849 struct xfrm_user_offload *xuo);
1850 bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x);
1851
1852 static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
1853 {
1854 struct xfrm_state_offload *xso = &x->xso;
1855
1856 if (xso->dev && xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn)
1857 xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn(x);
1858 }
1859
1860 static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
1861 {
1862 struct xfrm_state *x = dst->xfrm;
1863 struct xfrm_dst *xdst;
1864
1865 if (!x || !x->type_offload)
1866 return false;
1867
1868 xdst = (struct xfrm_dst *) dst;
1869 if (!x->xso.offload_handle && !xdst->child->xfrm)
1870 return true;
1871 if (x->xso.offload_handle && (x->xso.dev == xfrm_dst_path(dst)->dev) &&
1872 !xdst->child->xfrm)
1873 return true;
1874
1875 return false;
1876 }
1877
1878 static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1879 {
1880 struct xfrm_state_offload *xso = &x->xso;
1881
1882 if (xso->dev)
1883 xso->dev->xfrmdev_ops->xdo_dev_state_delete(x);
1884 }
1885
1886 static inline void xfrm_dev_state_free(struct xfrm_state *x)
1887 {
1888 struct xfrm_state_offload *xso = &x->xso;
1889 struct net_device *dev = xso->dev;
1890
1891 if (dev && dev->xfrmdev_ops) {
1892 if (dev->xfrmdev_ops->xdo_dev_state_free)
1893 dev->xfrmdev_ops->xdo_dev_state_free(x);
1894 xso->dev = NULL;
1895 dev_put(dev);
1896 }
1897 }
1898 #else
1899 static inline void xfrm_dev_resume(struct sk_buff *skb)
1900 {
1901 }
1902
1903 static inline void xfrm_dev_backlog(struct softnet_data *sd)
1904 {
1905 }
1906
1907 static inline struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again)
1908 {
1909 return skb;
1910 }
1911
1912 static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo)
1913 {
1914 return 0;
1915 }
1916
1917 static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1918 {
1919 }
1920
1921 static inline void xfrm_dev_state_free(struct xfrm_state *x)
1922 {
1923 }
1924
1925 static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x)
1926 {
1927 return false;
1928 }
1929
1930 static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
1931 {
1932 }
1933
1934 static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
1935 {
1936 return false;
1937 }
1938 #endif
1939
1940 static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1941 {
1942 if (attrs[XFRMA_MARK])
1943 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
1944 else
1945 m->v = m->m = 0;
1946
1947 return m->v & m->m;
1948 }
1949
1950 static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
1951 {
1952 int ret = 0;
1953
1954 if (m->m | m->v)
1955 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
1956 return ret;
1957 }
1958
1959 static inline __u32 xfrm_smark_get(__u32 mark, struct xfrm_state *x)
1960 {
1961 struct xfrm_mark *m = &x->props.smark;
1962
1963 return (m->v & m->m) | (mark & ~m->m);
1964 }
1965
1966 static inline int xfrm_if_id_put(struct sk_buff *skb, __u32 if_id)
1967 {
1968 int ret = 0;
1969
1970 if (if_id)
1971 ret = nla_put_u32(skb, XFRMA_IF_ID, if_id);
1972 return ret;
1973 }
1974
1975 static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x,
1976 unsigned int family)
1977 {
1978 bool tunnel = false;
1979
1980 switch(family) {
1981 case AF_INET:
1982 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4)
1983 tunnel = true;
1984 break;
1985 case AF_INET6:
1986 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6)
1987 tunnel = true;
1988 break;
1989 }
1990 if (tunnel && !(x->outer_mode.flags & XFRM_MODE_FLAG_TUNNEL))
1991 return -EINVAL;
1992
1993 return 0;
1994 }
1995 #endif /* _NET_XFRM_H */
Linux with added FPC-III support