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Revert "tty: hvc: Fix data abort due to race in hvc_open"
[linux/fpc-iii.git] / include / net / xfrm.h
blob03024701c79f78bc41b539d803d72c262c2c9f2c
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 #define XFRM_XMIT 256
1017
1018 __u32 status;
1019 #define CRYPTO_SUCCESS 1
1020 #define CRYPTO_GENERIC_ERROR 2
1021 #define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4
1022 #define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8
1023 #define CRYPTO_TUNNEL_AH_AUTH_FAILED 16
1024 #define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32
1025 #define CRYPTO_INVALID_PACKET_SYNTAX 64
1026 #define CRYPTO_INVALID_PROTOCOL 128
1027
1028 __u8 proto;
1029 };
1030
1031 struct sec_path {
1032 int len;
1033 int olen;
1034
1035 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
1036 struct xfrm_offload ovec[XFRM_MAX_OFFLOAD_DEPTH];
1037 };
1038
1039 struct sec_path *secpath_set(struct sk_buff *skb);
1040
1041 static inline void
1042 secpath_reset(struct sk_buff *skb)
1043 {
1044 #ifdef CONFIG_XFRM
1045 skb_ext_del(skb, SKB_EXT_SEC_PATH);
1046 #endif
1047 }
1048
1049 static inline int
1050 xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
1051 {
1052 switch (family) {
1053 case AF_INET:
1054 return addr->a4 == 0;
1055 case AF_INET6:
1056 return ipv6_addr_any(&addr->in6);
1057 }
1058 return 0;
1059 }
1060
1061 static inline int
1062 __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1063 {
1064 return (tmpl->saddr.a4 &&
1065 tmpl->saddr.a4 != x->props.saddr.a4);
1066 }
1067
1068 static inline int
1069 __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1070 {
1071 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
1072 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
1073 }
1074
1075 static inline int
1076 xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
1077 {
1078 switch (family) {
1079 case AF_INET:
1080 return __xfrm4_state_addr_cmp(tmpl, x);
1081 case AF_INET6:
1082 return __xfrm6_state_addr_cmp(tmpl, x);
1083 }
1084 return !0;
1085 }
1086
1087 #ifdef CONFIG_XFRM
1088 int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb,
1089 unsigned short family);
1090
1091 static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1092 struct sk_buff *skb,
1093 unsigned int family, int reverse)
1094 {
1095 struct net *net = dev_net(skb->dev);
1096 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1097
1098 if (sk && sk->sk_policy[XFRM_POLICY_IN])
1099 return __xfrm_policy_check(sk, ndir, skb, family);
1100
1101 return (!net->xfrm.policy_count[dir] && !secpath_exists(skb)) ||
1102 (skb_dst(skb)->flags & DST_NOPOLICY) ||
1103 __xfrm_policy_check(sk, ndir, skb, family);
1104 }
1105
1106 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1107 {
1108 return __xfrm_policy_check2(sk, dir, skb, family, 0);
1109 }
1110
1111 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1112 {
1113 return xfrm_policy_check(sk, dir, skb, AF_INET);
1114 }
1115
1116 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1117 {
1118 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1119 }
1120
1121 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1122 struct sk_buff *skb)
1123 {
1124 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1125 }
1126
1127 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1128 struct sk_buff *skb)
1129 {
1130 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1131 }
1132
1133 int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1134 unsigned int family, int reverse);
1135
1136 static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1137 unsigned int family)
1138 {
1139 return __xfrm_decode_session(skb, fl, family, 0);
1140 }
1141
1142 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1143 struct flowi *fl,
1144 unsigned int family)
1145 {
1146 return __xfrm_decode_session(skb, fl, family, 1);
1147 }
1148
1149 int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1150
1151 static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1152 {
1153 struct net *net = dev_net(skb->dev);
1154
1155 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
1156 (skb_dst(skb)->flags & DST_NOXFRM) ||
1157 __xfrm_route_forward(skb, family);
1158 }
1159
1160 static inline int xfrm4_route_forward(struct sk_buff *skb)
1161 {
1162 return xfrm_route_forward(skb, AF_INET);
1163 }
1164
1165 static inline int xfrm6_route_forward(struct sk_buff *skb)
1166 {
1167 return xfrm_route_forward(skb, AF_INET6);
1168 }
1169
1170 int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk);
1171
1172 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk)
1173 {
1174 sk->sk_policy[0] = NULL;
1175 sk->sk_policy[1] = NULL;
1176 if (unlikely(osk->sk_policy[0] || osk->sk_policy[1]))
1177 return __xfrm_sk_clone_policy(sk, osk);
1178 return 0;
1179 }
1180
1181 int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
1182
1183 static inline void xfrm_sk_free_policy(struct sock *sk)
1184 {
1185 struct xfrm_policy *pol;
1186
1187 pol = rcu_dereference_protected(sk->sk_policy[0], 1);
1188 if (unlikely(pol != NULL)) {
1189 xfrm_policy_delete(pol, XFRM_POLICY_MAX);
1190 sk->sk_policy[0] = NULL;
1191 }
1192 pol = rcu_dereference_protected(sk->sk_policy[1], 1);
1193 if (unlikely(pol != NULL)) {
1194 xfrm_policy_delete(pol, XFRM_POLICY_MAX+1);
1195 sk->sk_policy[1] = NULL;
1196 }
1197 }
1198
1199 #else
1200
1201 static inline void xfrm_sk_free_policy(struct sock *sk) {}
1202 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; }
1203 static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1204 static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1205 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1206 {
1207 return 1;
1208 }
1209 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1210 {
1211 return 1;
1212 }
1213 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1214 {
1215 return 1;
1216 }
1217 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1218 struct flowi *fl,
1219 unsigned int family)
1220 {
1221 return -ENOSYS;
1222 }
1223 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1224 struct sk_buff *skb)
1225 {
1226 return 1;
1227 }
1228 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1229 struct sk_buff *skb)
1230 {
1231 return 1;
1232 }
1233 #endif
1234
1235 static __inline__
1236 xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
1237 {
1238 switch (family){
1239 case AF_INET:
1240 return (xfrm_address_t *)&fl->u.ip4.daddr;
1241 case AF_INET6:
1242 return (xfrm_address_t *)&fl->u.ip6.daddr;
1243 }
1244 return NULL;
1245 }
1246
1247 static __inline__
1248 xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
1249 {
1250 switch (family){
1251 case AF_INET:
1252 return (xfrm_address_t *)&fl->u.ip4.saddr;
1253 case AF_INET6:
1254 return (xfrm_address_t *)&fl->u.ip6.saddr;
1255 }
1256 return NULL;
1257 }
1258
1259 static __inline__
1260 void xfrm_flowi_addr_get(const struct flowi *fl,
1261 xfrm_address_t *saddr, xfrm_address_t *daddr,
1262 unsigned short family)
1263 {
1264 switch(family) {
1265 case AF_INET:
1266 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1267 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
1268 break;
1269 case AF_INET6:
1270 saddr->in6 = fl->u.ip6.saddr;
1271 daddr->in6 = fl->u.ip6.daddr;
1272 break;
1273 }
1274 }
1275
1276 static __inline__ int
1277 __xfrm4_state_addr_check(const struct xfrm_state *x,
1278 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1279 {
1280 if (daddr->a4 == x->id.daddr.a4 &&
1281 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1282 return 1;
1283 return 0;
1284 }
1285
1286 static __inline__ int
1287 __xfrm6_state_addr_check(const struct xfrm_state *x,
1288 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1289 {
1290 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1291 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
1292 ipv6_addr_any((struct in6_addr *)saddr) ||
1293 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1294 return 1;
1295 return 0;
1296 }
1297
1298 static __inline__ int
1299 xfrm_state_addr_check(const struct xfrm_state *x,
1300 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1301 unsigned short family)
1302 {
1303 switch (family) {
1304 case AF_INET:
1305 return __xfrm4_state_addr_check(x, daddr, saddr);
1306 case AF_INET6:
1307 return __xfrm6_state_addr_check(x, daddr, saddr);
1308 }
1309 return 0;
1310 }
1311
1312 static __inline__ int
1313 xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
1314 unsigned short family)
1315 {
1316 switch (family) {
1317 case AF_INET:
1318 return __xfrm4_state_addr_check(x,
1319 (const xfrm_address_t *)&fl->u.ip4.daddr,
1320 (const xfrm_address_t *)&fl->u.ip4.saddr);
1321 case AF_INET6:
1322 return __xfrm6_state_addr_check(x,
1323 (const xfrm_address_t *)&fl->u.ip6.daddr,
1324 (const xfrm_address_t *)&fl->u.ip6.saddr);
1325 }
1326 return 0;
1327 }
1328
1329 static inline int xfrm_state_kern(const struct xfrm_state *x)
1330 {
1331 return atomic_read(&x->tunnel_users);
1332 }
1333
1334 static inline bool xfrm_id_proto_valid(u8 proto)
1335 {
1336 switch (proto) {
1337 case IPPROTO_AH:
1338 case IPPROTO_ESP:
1339 case IPPROTO_COMP:
1340 #if IS_ENABLED(CONFIG_IPV6)
1341 case IPPROTO_ROUTING:
1342 case IPPROTO_DSTOPTS:
1343 #endif
1344 return true;
1345 default:
1346 return false;
1347 }
1348 }
1349
1350 /* IPSEC_PROTO_ANY only matches 3 IPsec protocols, 0 could match all. */
1351 static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1352 {
1353 return (!userproto || proto == userproto ||
1354 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1355 proto == IPPROTO_ESP ||
1356 proto == IPPROTO_COMP)));
1357 }
1358
1359 /*
1360 * xfrm algorithm information
1361 */
1362 struct xfrm_algo_aead_info {
1363 char *geniv;
1364 u16 icv_truncbits;
1365 };
1366
1367 struct xfrm_algo_auth_info {
1368 u16 icv_truncbits;
1369 u16 icv_fullbits;
1370 };
1371
1372 struct xfrm_algo_encr_info {
1373 char *geniv;
1374 u16 blockbits;
1375 u16 defkeybits;
1376 };
1377
1378 struct xfrm_algo_comp_info {
1379 u16 threshold;
1380 };
1381
1382 struct xfrm_algo_desc {
1383 char *name;
1384 char *compat;
1385 u8 available:1;
1386 u8 pfkey_supported:1;
1387 union {
1388 struct xfrm_algo_aead_info aead;
1389 struct xfrm_algo_auth_info auth;
1390 struct xfrm_algo_encr_info encr;
1391 struct xfrm_algo_comp_info comp;
1392 } uinfo;
1393 struct sadb_alg desc;
1394 };
1395
1396 /* XFRM protocol handlers. */
1397 struct xfrm4_protocol {
1398 int (*handler)(struct sk_buff *skb);
1399 int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
1400 int encap_type);
1401 int (*cb_handler)(struct sk_buff *skb, int err);
1402 int (*err_handler)(struct sk_buff *skb, u32 info);
1403
1404 struct xfrm4_protocol __rcu *next;
1405 int priority;
1406 };
1407
1408 struct xfrm6_protocol {
1409 int (*handler)(struct sk_buff *skb);
1410 int (*cb_handler)(struct sk_buff *skb, int err);
1411 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1412 u8 type, u8 code, int offset, __be32 info);
1413
1414 struct xfrm6_protocol __rcu *next;
1415 int priority;
1416 };
1417
1418 /* XFRM tunnel handlers. */
1419 struct xfrm_tunnel {
1420 int (*handler)(struct sk_buff *skb);
1421 int (*err_handler)(struct sk_buff *skb, u32 info);
1422
1423 struct xfrm_tunnel __rcu *next;
1424 int priority;
1425 };
1426
1427 struct xfrm6_tunnel {
1428 int (*handler)(struct sk_buff *skb);
1429 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1430 u8 type, u8 code, int offset, __be32 info);
1431 struct xfrm6_tunnel __rcu *next;
1432 int priority;
1433 };
1434
1435 void xfrm_init(void);
1436 void xfrm4_init(void);
1437 int xfrm_state_init(struct net *net);
1438 void xfrm_state_fini(struct net *net);
1439 void xfrm4_state_init(void);
1440 void xfrm4_protocol_init(void);
1441 #ifdef CONFIG_XFRM
1442 int xfrm6_init(void);
1443 void xfrm6_fini(void);
1444 int xfrm6_state_init(void);
1445 void xfrm6_state_fini(void);
1446 int xfrm6_protocol_init(void);
1447 void xfrm6_protocol_fini(void);
1448 #else
1449 static inline int xfrm6_init(void)
1450 {
1451 return 0;
1452 }
1453 static inline void xfrm6_fini(void)
1454 {
1455 ;
1456 }
1457 #endif
1458
1459 #ifdef CONFIG_XFRM_STATISTICS
1460 int xfrm_proc_init(struct net *net);
1461 void xfrm_proc_fini(struct net *net);
1462 #endif
1463
1464 int xfrm_sysctl_init(struct net *net);
1465 #ifdef CONFIG_SYSCTL
1466 void xfrm_sysctl_fini(struct net *net);
1467 #else
1468 static inline void xfrm_sysctl_fini(struct net *net)
1469 {
1470 }
1471 #endif
1472
1473 void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
1474 struct xfrm_address_filter *filter);
1475 int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1476 int (*func)(struct xfrm_state *, int, void*), void *);
1477 void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net);
1478 struct xfrm_state *xfrm_state_alloc(struct net *net);
1479 void xfrm_state_free(struct xfrm_state *x);
1480 struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1481 const xfrm_address_t *saddr,
1482 const struct flowi *fl,
1483 struct xfrm_tmpl *tmpl,
1484 struct xfrm_policy *pol, int *err,
1485 unsigned short family, u32 if_id);
1486 struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, u32 if_id,
1487 xfrm_address_t *daddr,
1488 xfrm_address_t *saddr,
1489 unsigned short family,
1490 u8 mode, u8 proto, u32 reqid);
1491 struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
1492 unsigned short family);
1493 int xfrm_state_check_expire(struct xfrm_state *x);
1494 void xfrm_state_insert(struct xfrm_state *x);
1495 int xfrm_state_add(struct xfrm_state *x);
1496 int xfrm_state_update(struct xfrm_state *x);
1497 struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1498 const xfrm_address_t *daddr, __be32 spi,
1499 u8 proto, unsigned short family);
1500 struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1501 const xfrm_address_t *daddr,
1502 const xfrm_address_t *saddr,
1503 u8 proto,
1504 unsigned short family);
1505 #ifdef CONFIG_XFRM_SUB_POLICY
1506 void xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1507 unsigned short family);
1508 void xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1509 unsigned short family);
1510 #else
1511 static inline void xfrm_tmpl_sort(struct xfrm_tmpl **d, struct xfrm_tmpl **s,
1512 int n, unsigned short family)
1513 {
1514 }
1515
1516 static inline void xfrm_state_sort(struct xfrm_state **d, struct xfrm_state **s,
1517 int n, unsigned short family)
1518 {
1519 }
1520 #endif
1521
1522 struct xfrmk_sadinfo {
1523 u32 sadhcnt; /* current hash bkts */
1524 u32 sadhmcnt; /* max allowed hash bkts */
1525 u32 sadcnt; /* current running count */
1526 };
1527
1528 struct xfrmk_spdinfo {
1529 u32 incnt;
1530 u32 outcnt;
1531 u32 fwdcnt;
1532 u32 inscnt;
1533 u32 outscnt;
1534 u32 fwdscnt;
1535 u32 spdhcnt;
1536 u32 spdhmcnt;
1537 };
1538
1539 struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1540 int xfrm_state_delete(struct xfrm_state *x);
1541 int xfrm_state_flush(struct net *net, u8 proto, bool task_valid, bool sync);
1542 int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid);
1543 void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1544 void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1545 u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1546 int xfrm_init_replay(struct xfrm_state *x);
1547 u32 xfrm_state_mtu(struct xfrm_state *x, int mtu);
1548 int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload);
1549 int xfrm_init_state(struct xfrm_state *x);
1550 int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
1551 int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
1552 int xfrm_trans_queue_net(struct net *net, struct sk_buff *skb,
1553 int (*finish)(struct net *, struct sock *,
1554 struct sk_buff *));
1555 int xfrm_trans_queue(struct sk_buff *skb,
1556 int (*finish)(struct net *, struct sock *,
1557 struct sk_buff *));
1558 int xfrm_output_resume(struct sk_buff *skb, int err);
1559 int xfrm_output(struct sock *sk, struct sk_buff *skb);
1560
1561 #if IS_ENABLED(CONFIG_NET_PKTGEN)
1562 int pktgen_xfrm_outer_mode_output(struct xfrm_state *x, struct sk_buff *skb);
1563 #endif
1564
1565 void xfrm_local_error(struct sk_buff *skb, int mtu);
1566 int xfrm4_extract_header(struct sk_buff *skb);
1567 int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1568 int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1569 int encap_type);
1570 int xfrm4_transport_finish(struct sk_buff *skb, int async);
1571 int xfrm4_rcv(struct sk_buff *skb);
1572 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1573
1574 static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1575 {
1576 XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
1577 XFRM_SPI_SKB_CB(skb)->family = AF_INET;
1578 XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
1579 return xfrm_input(skb, nexthdr, spi, 0);
1580 }
1581
1582 int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1583 int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1584 int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb);
1585 int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol);
1586 int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol);
1587 int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1588 int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
1589 void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
1590 int xfrm6_extract_header(struct sk_buff *skb);
1591 int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1592 int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi,
1593 struct ip6_tnl *t);
1594 int xfrm6_transport_finish(struct sk_buff *skb, int async);
1595 int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t);
1596 int xfrm6_rcv(struct sk_buff *skb);
1597 int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1598 xfrm_address_t *saddr, u8 proto);
1599 void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
1600 int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol);
1601 int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol);
1602 int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1603 int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
1604 __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1605 __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1606 int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1607 int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1608 int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb);
1609 int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1610 u8 **prevhdr);
1611
1612 #ifdef CONFIG_XFRM
1613 int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1614 int xfrm_user_policy(struct sock *sk, int optname,
1615 u8 __user *optval, int optlen);
1616 #else
1617 static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1618 {
1619 return -ENOPROTOOPT;
1620 }
1621 #endif
1622
1623 struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif,
1624 const xfrm_address_t *saddr,
1625 const xfrm_address_t *daddr,
1626 int family, u32 mark);
1627
1628 struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
1629
1630 void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1631 int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1632 int (*func)(struct xfrm_policy *, int, int, void*),
1633 void *);
1634 void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net);
1635 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
1636 struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, u32 if_id,
1637 u8 type, int dir,
1638 struct xfrm_selector *sel,
1639 struct xfrm_sec_ctx *ctx, int delete,
1640 int *err);
1641 struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u32 if_id, u8,
1642 int dir, u32 id, int delete, int *err);
1643 int xfrm_policy_flush(struct net *net, u8 type, bool task_valid);
1644 void xfrm_policy_hash_rebuild(struct net *net);
1645 u32 xfrm_get_acqseq(void);
1646 int verify_spi_info(u8 proto, u32 min, u32 max);
1647 int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
1648 struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark,
1649 u8 mode, u32 reqid, u32 if_id, u8 proto,
1650 const xfrm_address_t *daddr,
1651 const xfrm_address_t *saddr, int create,
1652 unsigned short family);
1653 int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
1654
1655 #ifdef CONFIG_XFRM_MIGRATE
1656 int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1657 const struct xfrm_migrate *m, int num_bundles,
1658 const struct xfrm_kmaddress *k,
1659 const struct xfrm_encap_tmpl *encap);
1660 struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net);
1661 struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
1662 struct xfrm_migrate *m,
1663 struct xfrm_encap_tmpl *encap);
1664 int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1665 struct xfrm_migrate *m, int num_bundles,
1666 struct xfrm_kmaddress *k, struct net *net,
1667 struct xfrm_encap_tmpl *encap);
1668 #endif
1669
1670 int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1671 void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1672 int km_report(struct net *net, u8 proto, struct xfrm_selector *sel,
1673 xfrm_address_t *addr);
1674
1675 void xfrm_input_init(void);
1676 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1677
1678 void xfrm_probe_algs(void);
1679 int xfrm_count_pfkey_auth_supported(void);
1680 int xfrm_count_pfkey_enc_supported(void);
1681 struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1682 struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1683 struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1684 struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1685 struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1686 struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1687 struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1688 struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1689 struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1690 int probe);
1691
1692 static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1693 const xfrm_address_t *b)
1694 {
1695 return ipv6_addr_equal((const struct in6_addr *)a,
1696 (const struct in6_addr *)b);
1697 }
1698
1699 static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1700 const xfrm_address_t *b,
1701 sa_family_t family)
1702 {
1703 switch (family) {
1704 default:
1705 case AF_INET:
1706 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1707 case AF_INET6:
1708 return xfrm6_addr_equal(a, b);
1709 }
1710 }
1711
1712 static inline int xfrm_policy_id2dir(u32 index)
1713 {
1714 return index & 7;
1715 }
1716
1717 #ifdef CONFIG_XFRM
1718 static inline int xfrm_aevent_is_on(struct net *net)
1719 {
1720 struct sock *nlsk;
1721 int ret = 0;
1722
1723 rcu_read_lock();
1724 nlsk = rcu_dereference(net->xfrm.nlsk);
1725 if (nlsk)
1726 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1727 rcu_read_unlock();
1728 return ret;
1729 }
1730
1731 static inline int xfrm_acquire_is_on(struct net *net)
1732 {
1733 struct sock *nlsk;
1734 int ret = 0;
1735
1736 rcu_read_lock();
1737 nlsk = rcu_dereference(net->xfrm.nlsk);
1738 if (nlsk)
1739 ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE);
1740 rcu_read_unlock();
1741
1742 return ret;
1743 }
1744 #endif
1745
1746 static inline unsigned int aead_len(struct xfrm_algo_aead *alg)
1747 {
1748 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1749 }
1750
1751 static inline unsigned int xfrm_alg_len(const struct xfrm_algo *alg)
1752 {
1753 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1754 }
1755
1756 static inline unsigned int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
1757 {
1758 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1759 }
1760
1761 static inline unsigned int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1762 {
1763 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1764 }
1765
1766 #ifdef CONFIG_XFRM_MIGRATE
1767 static inline int xfrm_replay_clone(struct xfrm_state *x,
1768 struct xfrm_state *orig)
1769 {
1770 x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
1771 GFP_KERNEL);
1772 if (!x->replay_esn)
1773 return -ENOMEM;
1774
1775 x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
1776 x->replay_esn->replay_window = orig->replay_esn->replay_window;
1777
1778 x->preplay_esn = kmemdup(x->replay_esn,
1779 xfrm_replay_state_esn_len(x->replay_esn),
1780 GFP_KERNEL);
1781 if (!x->preplay_esn) {
1782 kfree(x->replay_esn);
1783 return -ENOMEM;
1784 }
1785
1786 return 0;
1787 }
1788
1789 static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig)
1790 {
1791 return kmemdup(orig, aead_len(orig), GFP_KERNEL);
1792 }
1793
1794
1795 static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1796 {
1797 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
1798 }
1799
1800 static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1801 {
1802 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1803 }
1804
1805 static inline void xfrm_states_put(struct xfrm_state **states, int n)
1806 {
1807 int i;
1808 for (i = 0; i < n; i++)
1809 xfrm_state_put(*(states + i));
1810 }
1811
1812 static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1813 {
1814 int i;
1815 for (i = 0; i < n; i++)
1816 xfrm_state_delete(*(states + i));
1817 }
1818 #endif
1819
1820 #ifdef CONFIG_XFRM
1821 static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1822 {
1823 struct sec_path *sp = skb_sec_path(skb);
1824
1825 return sp->xvec[sp->len - 1];
1826 }
1827 #endif
1828
1829 static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb)
1830 {
1831 #ifdef CONFIG_XFRM
1832 struct sec_path *sp = skb_sec_path(skb);
1833
1834 if (!sp || !sp->olen || sp->len != sp->olen)
1835 return NULL;
1836
1837 return &sp->ovec[sp->olen - 1];
1838 #else
1839 return NULL;
1840 #endif
1841 }
1842
1843 void __init xfrm_dev_init(void);
1844
1845 #ifdef CONFIG_XFRM_OFFLOAD
1846 void xfrm_dev_resume(struct sk_buff *skb);
1847 void xfrm_dev_backlog(struct softnet_data *sd);
1848 struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again);
1849 int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
1850 struct xfrm_user_offload *xuo);
1851 bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x);
1852
1853 static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
1854 {
1855 struct xfrm_state_offload *xso = &x->xso;
1856
1857 if (xso->dev && xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn)
1858 xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn(x);
1859 }
1860
1861 static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
1862 {
1863 struct xfrm_state *x = dst->xfrm;
1864 struct xfrm_dst *xdst;
1865
1866 if (!x || !x->type_offload)
1867 return false;
1868
1869 xdst = (struct xfrm_dst *) dst;
1870 if (!x->xso.offload_handle && !xdst->child->xfrm)
1871 return true;
1872 if (x->xso.offload_handle && (x->xso.dev == xfrm_dst_path(dst)->dev) &&
1873 !xdst->child->xfrm)
1874 return true;
1875
1876 return false;
1877 }
1878
1879 static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1880 {
1881 struct xfrm_state_offload *xso = &x->xso;
1882
1883 if (xso->dev)
1884 xso->dev->xfrmdev_ops->xdo_dev_state_delete(x);
1885 }
1886
1887 static inline void xfrm_dev_state_free(struct xfrm_state *x)
1888 {
1889 struct xfrm_state_offload *xso = &x->xso;
1890 struct net_device *dev = xso->dev;
1891
1892 if (dev && dev->xfrmdev_ops) {
1893 if (dev->xfrmdev_ops->xdo_dev_state_free)
1894 dev->xfrmdev_ops->xdo_dev_state_free(x);
1895 xso->dev = NULL;
1896 dev_put(dev);
1897 }
1898 }
1899 #else
1900 static inline void xfrm_dev_resume(struct sk_buff *skb)
1901 {
1902 }
1903
1904 static inline void xfrm_dev_backlog(struct softnet_data *sd)
1905 {
1906 }
1907
1908 static inline struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again)
1909 {
1910 return skb;
1911 }
1912
1913 static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo)
1914 {
1915 return 0;
1916 }
1917
1918 static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1919 {
1920 }
1921
1922 static inline void xfrm_dev_state_free(struct xfrm_state *x)
1923 {
1924 }
1925
1926 static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x)
1927 {
1928 return false;
1929 }
1930
1931 static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
1932 {
1933 }
1934
1935 static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
1936 {
1937 return false;
1938 }
1939 #endif
1940
1941 static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1942 {
1943 if (attrs[XFRMA_MARK])
1944 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
1945 else
1946 m->v = m->m = 0;
1947
1948 return m->v & m->m;
1949 }
1950
1951 static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
1952 {
1953 int ret = 0;
1954
1955 if (m->m | m->v)
1956 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
1957 return ret;
1958 }
1959
1960 static inline __u32 xfrm_smark_get(__u32 mark, struct xfrm_state *x)
1961 {
1962 struct xfrm_mark *m = &x->props.smark;
1963
1964 return (m->v & m->m) | (mark & ~m->m);
1965 }
1966
1967 static inline int xfrm_if_id_put(struct sk_buff *skb, __u32 if_id)
1968 {
1969 int ret = 0;
1970
1971 if (if_id)
1972 ret = nla_put_u32(skb, XFRMA_IF_ID, if_id);
1973 return ret;
1974 }
1975
1976 static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x,
1977 unsigned int family)
1978 {
1979 bool tunnel = false;
1980
1981 switch(family) {
1982 case AF_INET:
1983 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4)
1984 tunnel = true;
1985 break;
1986 case AF_INET6:
1987 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6)
1988 tunnel = true;
1989 break;
1990 }
1991 if (tunnel && !(x->outer_mode.flags & XFRM_MODE_FLAG_TUNNEL))
1992 return -EINVAL;
1993
1994 return 0;
1995 }
1996 #endif /* _NET_XFRM_H */
Linux with added FPC-III support