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Merge tag 'for-linus-20190706' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / include / net / xfrm.h
bloba2907873ed561bfdcf2d8504a4b69f3f7e8d7921
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
197 /* Data for care-of address */
198 xfrm_address_t *coaddr;
199
200 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
201 struct xfrm_state *tunnel;
202
203 /* If a tunnel, number of users + 1 */
204 atomic_t tunnel_users;
205
206 /* State for replay detection */
207 struct xfrm_replay_state replay;
208 struct xfrm_replay_state_esn *replay_esn;
209
210 /* Replay detection state at the time we sent the last notification */
211 struct xfrm_replay_state preplay;
212 struct xfrm_replay_state_esn *preplay_esn;
213
214 /* The functions for replay detection. */
215 const struct xfrm_replay *repl;
216
217 /* internal flag that only holds state for delayed aevent at the
218 * moment
219 */
220 u32 xflags;
221
222 /* Replay detection notification settings */
223 u32 replay_maxage;
224 u32 replay_maxdiff;
225
226 /* Replay detection notification timer */
227 struct timer_list rtimer;
228
229 /* Statistics */
230 struct xfrm_stats stats;
231
232 struct xfrm_lifetime_cur curlft;
233 struct hrtimer mtimer;
234
235 struct xfrm_state_offload xso;
236
237 /* used to fix curlft->add_time when changing date */
238 long saved_tmo;
239
240 /* Last used time */
241 time64_t lastused;
242
243 struct page_frag xfrag;
244
245 /* Reference to data common to all the instances of this
246 * transformer. */
247 const struct xfrm_type *type;
248 struct xfrm_mode inner_mode;
249 struct xfrm_mode inner_mode_iaf;
250 struct xfrm_mode outer_mode;
251
252 const struct xfrm_type_offload *type_offload;
253
254 /* Security context */
255 struct xfrm_sec_ctx *security;
256
257 /* Private data of this transformer, format is opaque,
258 * interpreted by xfrm_type methods. */
259 void *data;
260 };
261
262 static inline struct net *xs_net(struct xfrm_state *x)
263 {
264 return read_pnet(&x->xs_net);
265 }
266
267 /* xflags - make enum if more show up */
268 #define XFRM_TIME_DEFER 1
269 #define XFRM_SOFT_EXPIRE 2
270
271 enum {
272 XFRM_STATE_VOID,
273 XFRM_STATE_ACQ,
274 XFRM_STATE_VALID,
275 XFRM_STATE_ERROR,
276 XFRM_STATE_EXPIRED,
277 XFRM_STATE_DEAD
278 };
279
280 /* callback structure passed from either netlink or pfkey */
281 struct km_event {
282 union {
283 u32 hard;
284 u32 proto;
285 u32 byid;
286 u32 aevent;
287 u32 type;
288 } data;
289
290 u32 seq;
291 u32 portid;
292 u32 event;
293 struct net *net;
294 };
295
296 struct xfrm_replay {
297 void (*advance)(struct xfrm_state *x, __be32 net_seq);
298 int (*check)(struct xfrm_state *x,
299 struct sk_buff *skb,
300 __be32 net_seq);
301 int (*recheck)(struct xfrm_state *x,
302 struct sk_buff *skb,
303 __be32 net_seq);
304 void (*notify)(struct xfrm_state *x, int event);
305 int (*overflow)(struct xfrm_state *x, struct sk_buff *skb);
306 };
307
308 struct xfrm_if_cb {
309 struct xfrm_if *(*decode_session)(struct sk_buff *skb,
310 unsigned short family);
311 };
312
313 void xfrm_if_register_cb(const struct xfrm_if_cb *ifcb);
314 void xfrm_if_unregister_cb(void);
315
316 struct net_device;
317 struct xfrm_type;
318 struct xfrm_dst;
319 struct xfrm_policy_afinfo {
320 struct dst_ops *dst_ops;
321 struct dst_entry *(*dst_lookup)(struct net *net,
322 int tos, int oif,
323 const xfrm_address_t *saddr,
324 const xfrm_address_t *daddr,
325 u32 mark);
326 int (*get_saddr)(struct net *net, int oif,
327 xfrm_address_t *saddr,
328 xfrm_address_t *daddr,
329 u32 mark);
330 int (*fill_dst)(struct xfrm_dst *xdst,
331 struct net_device *dev,
332 const struct flowi *fl);
333 struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig);
334 };
335
336 int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo *afinfo, int family);
337 void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo *afinfo);
338 void km_policy_notify(struct xfrm_policy *xp, int dir,
339 const struct km_event *c);
340 void km_state_notify(struct xfrm_state *x, const struct km_event *c);
341
342 struct xfrm_tmpl;
343 int km_query(struct xfrm_state *x, struct xfrm_tmpl *t,
344 struct xfrm_policy *pol);
345 void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
346 int __xfrm_state_delete(struct xfrm_state *x);
347
348 struct xfrm_state_afinfo {
349 unsigned int family;
350 unsigned int proto;
351 __be16 eth_proto;
352 struct module *owner;
353 const struct xfrm_type *type_map[IPPROTO_MAX];
354 const struct xfrm_type_offload *type_offload_map[IPPROTO_MAX];
355
356 int (*init_flags)(struct xfrm_state *x);
357 void (*init_tempsel)(struct xfrm_selector *sel,
358 const struct flowi *fl);
359 void (*init_temprop)(struct xfrm_state *x,
360 const struct xfrm_tmpl *tmpl,
361 const xfrm_address_t *daddr,
362 const xfrm_address_t *saddr);
363 int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n);
364 int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n);
365 int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb);
366 int (*output_finish)(struct sock *sk, struct sk_buff *skb);
367 int (*extract_input)(struct xfrm_state *x,
368 struct sk_buff *skb);
369 int (*extract_output)(struct xfrm_state *x,
370 struct sk_buff *skb);
371 int (*transport_finish)(struct sk_buff *skb,
372 int async);
373 void (*local_error)(struct sk_buff *skb, u32 mtu);
374 };
375
376 int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
377 int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
378 struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
379 struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family);
380
381 struct xfrm_input_afinfo {
382 unsigned int family;
383 int (*callback)(struct sk_buff *skb, u8 protocol,
384 int err);
385 };
386
387 int xfrm_input_register_afinfo(const struct xfrm_input_afinfo *afinfo);
388 int xfrm_input_unregister_afinfo(const struct xfrm_input_afinfo *afinfo);
389
390 void xfrm_flush_gc(void);
391 void xfrm_state_delete_tunnel(struct xfrm_state *x);
392
393 struct xfrm_type {
394 char *description;
395 struct module *owner;
396 u8 proto;
397 u8 flags;
398 #define XFRM_TYPE_NON_FRAGMENT 1
399 #define XFRM_TYPE_REPLAY_PROT 2
400 #define XFRM_TYPE_LOCAL_COADDR 4
401 #define XFRM_TYPE_REMOTE_COADDR 8
402
403 int (*init_state)(struct xfrm_state *x);
404 void (*destructor)(struct xfrm_state *);
405 int (*input)(struct xfrm_state *, struct sk_buff *skb);
406 int (*output)(struct xfrm_state *, struct sk_buff *pskb);
407 int (*reject)(struct xfrm_state *, struct sk_buff *,
408 const struct flowi *);
409 int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **);
410 /* Estimate maximal size of result of transformation of a dgram */
411 u32 (*get_mtu)(struct xfrm_state *, int size);
412 };
413
414 int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
415 int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
416
417 struct xfrm_type_offload {
418 char *description;
419 struct module *owner;
420 u8 proto;
421 void (*encap)(struct xfrm_state *, struct sk_buff *pskb);
422 int (*input_tail)(struct xfrm_state *x, struct sk_buff *skb);
423 int (*xmit)(struct xfrm_state *, struct sk_buff *pskb, netdev_features_t features);
424 };
425
426 int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned short family);
427 int xfrm_unregister_type_offload(const struct xfrm_type_offload *type, unsigned short family);
428
429 static inline int xfrm_af2proto(unsigned int family)
430 {
431 switch(family) {
432 case AF_INET:
433 return IPPROTO_IPIP;
434 case AF_INET6:
435 return IPPROTO_IPV6;
436 default:
437 return 0;
438 }
439 }
440
441 static inline const struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
442 {
443 if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
444 (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
445 return &x->inner_mode;
446 else
447 return &x->inner_mode_iaf;
448 }
449
450 struct xfrm_tmpl {
451 /* id in template is interpreted as:
452 * daddr - destination of tunnel, may be zero for transport mode.
453 * spi - zero to acquire spi. Not zero if spi is static, then
454 * daddr must be fixed too.
455 * proto - AH/ESP/IPCOMP
456 */
457 struct xfrm_id id;
458
459 /* Source address of tunnel. Ignored, if it is not a tunnel. */
460 xfrm_address_t saddr;
461
462 unsigned short encap_family;
463
464 u32 reqid;
465
466 /* Mode: transport, tunnel etc. */
467 u8 mode;
468
469 /* Sharing mode: unique, this session only, this user only etc. */
470 u8 share;
471
472 /* May skip this transfomration if no SA is found */
473 u8 optional;
474
475 /* Skip aalgos/ealgos/calgos checks. */
476 u8 allalgs;
477
478 /* Bit mask of algos allowed for acquisition */
479 u32 aalgos;
480 u32 ealgos;
481 u32 calgos;
482 };
483
484 #define XFRM_MAX_DEPTH 6
485 #define XFRM_MAX_OFFLOAD_DEPTH 1
486
487 struct xfrm_policy_walk_entry {
488 struct list_head all;
489 u8 dead;
490 };
491
492 struct xfrm_policy_walk {
493 struct xfrm_policy_walk_entry walk;
494 u8 type;
495 u32 seq;
496 };
497
498 struct xfrm_policy_queue {
499 struct sk_buff_head hold_queue;
500 struct timer_list hold_timer;
501 unsigned long timeout;
502 };
503
504 struct xfrm_policy {
505 possible_net_t xp_net;
506 struct hlist_node bydst;
507 struct hlist_node byidx;
508
509 /* This lock only affects elements except for entry. */
510 rwlock_t lock;
511 refcount_t refcnt;
512 u32 pos;
513 struct timer_list timer;
514
515 atomic_t genid;
516 u32 priority;
517 u32 index;
518 u32 if_id;
519 struct xfrm_mark mark;
520 struct xfrm_selector selector;
521 struct xfrm_lifetime_cfg lft;
522 struct xfrm_lifetime_cur curlft;
523 struct xfrm_policy_walk_entry walk;
524 struct xfrm_policy_queue polq;
525 bool bydst_reinsert;
526 u8 type;
527 u8 action;
528 u8 flags;
529 u8 xfrm_nr;
530 u16 family;
531 struct xfrm_sec_ctx *security;
532 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
533 struct hlist_node bydst_inexact_list;
534 struct rcu_head rcu;
535 };
536
537 static inline struct net *xp_net(const struct xfrm_policy *xp)
538 {
539 return read_pnet(&xp->xp_net);
540 }
541
542 struct xfrm_kmaddress {
543 xfrm_address_t local;
544 xfrm_address_t remote;
545 u32 reserved;
546 u16 family;
547 };
548
549 struct xfrm_migrate {
550 xfrm_address_t old_daddr;
551 xfrm_address_t old_saddr;
552 xfrm_address_t new_daddr;
553 xfrm_address_t new_saddr;
554 u8 proto;
555 u8 mode;
556 u16 reserved;
557 u32 reqid;
558 u16 old_family;
559 u16 new_family;
560 };
561
562 #define XFRM_KM_TIMEOUT 30
563 /* what happened */
564 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
565 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
566
567 /* default aevent timeout in units of 100ms */
568 #define XFRM_AE_ETIME 10
569 /* Async Event timer multiplier */
570 #define XFRM_AE_ETH_M 10
571 /* default seq threshold size */
572 #define XFRM_AE_SEQT_SIZE 2
573
574 struct xfrm_mgr {
575 struct list_head list;
576 int (*notify)(struct xfrm_state *x, const struct km_event *c);
577 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp);
578 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
579 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
580 int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
581 int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
582 int (*migrate)(const struct xfrm_selector *sel,
583 u8 dir, u8 type,
584 const struct xfrm_migrate *m,
585 int num_bundles,
586 const struct xfrm_kmaddress *k,
587 const struct xfrm_encap_tmpl *encap);
588 bool (*is_alive)(const struct km_event *c);
589 };
590
591 int xfrm_register_km(struct xfrm_mgr *km);
592 int xfrm_unregister_km(struct xfrm_mgr *km);
593
594 struct xfrm_tunnel_skb_cb {
595 union {
596 struct inet_skb_parm h4;
597 struct inet6_skb_parm h6;
598 } header;
599
600 union {
601 struct ip_tunnel *ip4;
602 struct ip6_tnl *ip6;
603 } tunnel;
604 };
605
606 #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0]))
607
608 /*
609 * This structure is used for the duration where packets are being
610 * transformed by IPsec. As soon as the packet leaves IPsec the
611 * area beyond the generic IP part may be overwritten.
612 */
613 struct xfrm_skb_cb {
614 struct xfrm_tunnel_skb_cb header;
615
616 /* Sequence number for replay protection. */
617 union {
618 struct {
619 __u32 low;
620 __u32 hi;
621 } output;
622 struct {
623 __be32 low;
624 __be32 hi;
625 } input;
626 } seq;
627 };
628
629 #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
630
631 /*
632 * This structure is used by the afinfo prepare_input/prepare_output functions
633 * to transmit header information to the mode input/output functions.
634 */
635 struct xfrm_mode_skb_cb {
636 struct xfrm_tunnel_skb_cb header;
637
638 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
639 __be16 id;
640 __be16 frag_off;
641
642 /* IP header length (excluding options or extension headers). */
643 u8 ihl;
644
645 /* TOS for IPv4, class for IPv6. */
646 u8 tos;
647
648 /* TTL for IPv4, hop limitfor IPv6. */
649 u8 ttl;
650
651 /* Protocol for IPv4, NH for IPv6. */
652 u8 protocol;
653
654 /* Option length for IPv4, zero for IPv6. */
655 u8 optlen;
656
657 /* Used by IPv6 only, zero for IPv4. */
658 u8 flow_lbl[3];
659 };
660
661 #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
662
663 /*
664 * This structure is used by the input processing to locate the SPI and
665 * related information.
666 */
667 struct xfrm_spi_skb_cb {
668 struct xfrm_tunnel_skb_cb header;
669
670 unsigned int daddroff;
671 unsigned int family;
672 __be32 seq;
673 };
674
675 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
676
677 #ifdef CONFIG_AUDITSYSCALL
678 static inline struct audit_buffer *xfrm_audit_start(const char *op)
679 {
680 struct audit_buffer *audit_buf = NULL;
681
682 if (audit_enabled == AUDIT_OFF)
683 return NULL;
684 audit_buf = audit_log_start(audit_context(), GFP_ATOMIC,
685 AUDIT_MAC_IPSEC_EVENT);
686 if (audit_buf == NULL)
687 return NULL;
688 audit_log_format(audit_buf, "op=%s", op);
689 return audit_buf;
690 }
691
692 static inline void xfrm_audit_helper_usrinfo(bool task_valid,
693 struct audit_buffer *audit_buf)
694 {
695 const unsigned int auid = from_kuid(&init_user_ns, task_valid ?
696 audit_get_loginuid(current) :
697 INVALID_UID);
698 const unsigned int ses = task_valid ? audit_get_sessionid(current) :
699 AUDIT_SID_UNSET;
700
701 audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses);
702 audit_log_task_context(audit_buf);
703 }
704
705 void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid);
706 void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
707 bool task_valid);
708 void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid);
709 void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid);
710 void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
711 struct sk_buff *skb);
712 void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb,
713 __be32 net_seq);
714 void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
715 void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi,
716 __be32 net_seq);
717 void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb,
718 u8 proto);
719 #else
720
721 static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
722 bool task_valid)
723 {
724 }
725
726 static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
727 bool task_valid)
728 {
729 }
730
731 static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
732 bool task_valid)
733 {
734 }
735
736 static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
737 bool task_valid)
738 {
739 }
740
741 static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
742 struct sk_buff *skb)
743 {
744 }
745
746 static inline void xfrm_audit_state_replay(struct xfrm_state *x,
747 struct sk_buff *skb, __be32 net_seq)
748 {
749 }
750
751 static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
752 u16 family)
753 {
754 }
755
756 static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
757 __be32 net_spi, __be32 net_seq)
758 {
759 }
760
761 static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
762 struct sk_buff *skb, u8 proto)
763 {
764 }
765 #endif /* CONFIG_AUDITSYSCALL */
766
767 static inline void xfrm_pol_hold(struct xfrm_policy *policy)
768 {
769 if (likely(policy != NULL))
770 refcount_inc(&policy->refcnt);
771 }
772
773 void xfrm_policy_destroy(struct xfrm_policy *policy);
774
775 static inline void xfrm_pol_put(struct xfrm_policy *policy)
776 {
777 if (refcount_dec_and_test(&policy->refcnt))
778 xfrm_policy_destroy(policy);
779 }
780
781 static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
782 {
783 int i;
784 for (i = npols - 1; i >= 0; --i)
785 xfrm_pol_put(pols[i]);
786 }
787
788 void __xfrm_state_destroy(struct xfrm_state *, bool);
789
790 static inline void __xfrm_state_put(struct xfrm_state *x)
791 {
792 refcount_dec(&x->refcnt);
793 }
794
795 static inline void xfrm_state_put(struct xfrm_state *x)
796 {
797 if (refcount_dec_and_test(&x->refcnt))
798 __xfrm_state_destroy(x, false);
799 }
800
801 static inline void xfrm_state_put_sync(struct xfrm_state *x)
802 {
803 if (refcount_dec_and_test(&x->refcnt))
804 __xfrm_state_destroy(x, true);
805 }
806
807 static inline void xfrm_state_hold(struct xfrm_state *x)
808 {
809 refcount_inc(&x->refcnt);
810 }
811
812 static inline bool addr_match(const void *token1, const void *token2,
813 unsigned int prefixlen)
814 {
815 const __be32 *a1 = token1;
816 const __be32 *a2 = token2;
817 unsigned int pdw;
818 unsigned int pbi;
819
820 pdw = prefixlen >> 5; /* num of whole u32 in prefix */
821 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
822
823 if (pdw)
824 if (memcmp(a1, a2, pdw << 2))
825 return false;
826
827 if (pbi) {
828 __be32 mask;
829
830 mask = htonl((0xffffffff) << (32 - pbi));
831
832 if ((a1[pdw] ^ a2[pdw]) & mask)
833 return false;
834 }
835
836 return true;
837 }
838
839 static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
840 {
841 /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
842 if (sizeof(long) == 4 && prefixlen == 0)
843 return true;
844 return !((a1 ^ a2) & htonl(~0UL << (32 - prefixlen)));
845 }
846
847 static __inline__
848 __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
849 {
850 __be16 port;
851 switch(fl->flowi_proto) {
852 case IPPROTO_TCP:
853 case IPPROTO_UDP:
854 case IPPROTO_UDPLITE:
855 case IPPROTO_SCTP:
856 port = uli->ports.sport;
857 break;
858 case IPPROTO_ICMP:
859 case IPPROTO_ICMPV6:
860 port = htons(uli->icmpt.type);
861 break;
862 case IPPROTO_MH:
863 port = htons(uli->mht.type);
864 break;
865 case IPPROTO_GRE:
866 port = htons(ntohl(uli->gre_key) >> 16);
867 break;
868 default:
869 port = 0; /*XXX*/
870 }
871 return port;
872 }
873
874 static __inline__
875 __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
876 {
877 __be16 port;
878 switch(fl->flowi_proto) {
879 case IPPROTO_TCP:
880 case IPPROTO_UDP:
881 case IPPROTO_UDPLITE:
882 case IPPROTO_SCTP:
883 port = uli->ports.dport;
884 break;
885 case IPPROTO_ICMP:
886 case IPPROTO_ICMPV6:
887 port = htons(uli->icmpt.code);
888 break;
889 case IPPROTO_GRE:
890 port = htons(ntohl(uli->gre_key) & 0xffff);
891 break;
892 default:
893 port = 0; /*XXX*/
894 }
895 return port;
896 }
897
898 bool xfrm_selector_match(const struct xfrm_selector *sel,
899 const struct flowi *fl, unsigned short family);
900
901 #ifdef CONFIG_SECURITY_NETWORK_XFRM
902 /* If neither has a context --> match
903 * Otherwise, both must have a context and the sids, doi, alg must match
904 */
905 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
906 {
907 return ((!s1 && !s2) ||
908 (s1 && s2 &&
909 (s1->ctx_sid == s2->ctx_sid) &&
910 (s1->ctx_doi == s2->ctx_doi) &&
911 (s1->ctx_alg == s2->ctx_alg)));
912 }
913 #else
914 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
915 {
916 return true;
917 }
918 #endif
919
920 /* A struct encoding bundle of transformations to apply to some set of flow.
921 *
922 * xdst->child points to the next element of bundle.
923 * dst->xfrm points to an instanse of transformer.
924 *
925 * Due to unfortunate limitations of current routing cache, which we
926 * have no time to fix, it mirrors struct rtable and bound to the same
927 * routing key, including saddr,daddr. However, we can have many of
928 * bundles differing by session id. All the bundles grow from a parent
929 * policy rule.
930 */
931 struct xfrm_dst {
932 union {
933 struct dst_entry dst;
934 struct rtable rt;
935 struct rt6_info rt6;
936 } u;
937 struct dst_entry *route;
938 struct dst_entry *child;
939 struct dst_entry *path;
940 struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
941 int num_pols, num_xfrms;
942 u32 xfrm_genid;
943 u32 policy_genid;
944 u32 route_mtu_cached;
945 u32 child_mtu_cached;
946 u32 route_cookie;
947 u32 path_cookie;
948 };
949
950 static inline struct dst_entry *xfrm_dst_path(const struct dst_entry *dst)
951 {
952 #ifdef CONFIG_XFRM
953 if (dst->xfrm) {
954 const struct xfrm_dst *xdst = (const struct xfrm_dst *) dst;
955
956 return xdst->path;
957 }
958 #endif
959 return (struct dst_entry *) dst;
960 }
961
962 static inline struct dst_entry *xfrm_dst_child(const struct dst_entry *dst)
963 {
964 #ifdef CONFIG_XFRM
965 if (dst->xfrm) {
966 struct xfrm_dst *xdst = (struct xfrm_dst *) dst;
967 return xdst->child;
968 }
969 #endif
970 return NULL;
971 }
972
973 #ifdef CONFIG_XFRM
974 static inline void xfrm_dst_set_child(struct xfrm_dst *xdst, struct dst_entry *child)
975 {
976 xdst->child = child;
977 }
978
979 static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
980 {
981 xfrm_pols_put(xdst->pols, xdst->num_pols);
982 dst_release(xdst->route);
983 if (likely(xdst->u.dst.xfrm))
984 xfrm_state_put(xdst->u.dst.xfrm);
985 }
986 #endif
987
988 void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
989
990 struct xfrm_if_parms {
991 char name[IFNAMSIZ]; /* name of XFRM device */
992 int link; /* ifindex of underlying L2 interface */
993 u32 if_id; /* interface identifyer */
994 };
995
996 struct xfrm_if {
997 struct xfrm_if __rcu *next; /* next interface in list */
998 struct net_device *dev; /* virtual device associated with interface */
999 struct net_device *phydev; /* physical device */
1000 struct net *net; /* netns for packet i/o */
1001 struct xfrm_if_parms p; /* interface parms */
1002
1003 struct gro_cells gro_cells;
1004 };
1005
1006 struct xfrm_offload {
1007 /* Output sequence number for replay protection on offloading. */
1008 struct {
1009 __u32 low;
1010 __u32 hi;
1011 } seq;
1012
1013 __u32 flags;
1014 #define SA_DELETE_REQ 1
1015 #define CRYPTO_DONE 2
1016 #define CRYPTO_NEXT_DONE 4
1017 #define CRYPTO_FALLBACK 8
1018 #define XFRM_GSO_SEGMENT 16
1019 #define XFRM_GRO 32
1020 #define XFRM_ESP_NO_TRAILER 64
1021 #define XFRM_DEV_RESUME 128
1022
1023 __u32 status;
1024 #define CRYPTO_SUCCESS 1
1025 #define CRYPTO_GENERIC_ERROR 2
1026 #define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4
1027 #define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8
1028 #define CRYPTO_TUNNEL_AH_AUTH_FAILED 16
1029 #define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32
1030 #define CRYPTO_INVALID_PACKET_SYNTAX 64
1031 #define CRYPTO_INVALID_PROTOCOL 128
1032
1033 __u8 proto;
1034 };
1035
1036 struct sec_path {
1037 int len;
1038 int olen;
1039
1040 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
1041 struct xfrm_offload ovec[XFRM_MAX_OFFLOAD_DEPTH];
1042 };
1043
1044 struct sec_path *secpath_set(struct sk_buff *skb);
1045
1046 static inline void
1047 secpath_reset(struct sk_buff *skb)
1048 {
1049 #ifdef CONFIG_XFRM
1050 skb_ext_del(skb, SKB_EXT_SEC_PATH);
1051 #endif
1052 }
1053
1054 static inline int
1055 xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
1056 {
1057 switch (family) {
1058 case AF_INET:
1059 return addr->a4 == 0;
1060 case AF_INET6:
1061 return ipv6_addr_any(&addr->in6);
1062 }
1063 return 0;
1064 }
1065
1066 static inline int
1067 __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1068 {
1069 return (tmpl->saddr.a4 &&
1070 tmpl->saddr.a4 != x->props.saddr.a4);
1071 }
1072
1073 static inline int
1074 __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1075 {
1076 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
1077 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
1078 }
1079
1080 static inline int
1081 xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
1082 {
1083 switch (family) {
1084 case AF_INET:
1085 return __xfrm4_state_addr_cmp(tmpl, x);
1086 case AF_INET6:
1087 return __xfrm6_state_addr_cmp(tmpl, x);
1088 }
1089 return !0;
1090 }
1091
1092 #ifdef CONFIG_XFRM
1093 int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb,
1094 unsigned short family);
1095
1096 static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1097 struct sk_buff *skb,
1098 unsigned int family, int reverse)
1099 {
1100 struct net *net = dev_net(skb->dev);
1101 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1102
1103 if (sk && sk->sk_policy[XFRM_POLICY_IN])
1104 return __xfrm_policy_check(sk, ndir, skb, family);
1105
1106 return (!net->xfrm.policy_count[dir] && !secpath_exists(skb)) ||
1107 (skb_dst(skb)->flags & DST_NOPOLICY) ||
1108 __xfrm_policy_check(sk, ndir, skb, family);
1109 }
1110
1111 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1112 {
1113 return __xfrm_policy_check2(sk, dir, skb, family, 0);
1114 }
1115
1116 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1117 {
1118 return xfrm_policy_check(sk, dir, skb, AF_INET);
1119 }
1120
1121 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1122 {
1123 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1124 }
1125
1126 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1127 struct sk_buff *skb)
1128 {
1129 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1130 }
1131
1132 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1133 struct sk_buff *skb)
1134 {
1135 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1136 }
1137
1138 int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1139 unsigned int family, int reverse);
1140
1141 static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1142 unsigned int family)
1143 {
1144 return __xfrm_decode_session(skb, fl, family, 0);
1145 }
1146
1147 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1148 struct flowi *fl,
1149 unsigned int family)
1150 {
1151 return __xfrm_decode_session(skb, fl, family, 1);
1152 }
1153
1154 int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1155
1156 static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1157 {
1158 struct net *net = dev_net(skb->dev);
1159
1160 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
1161 (skb_dst(skb)->flags & DST_NOXFRM) ||
1162 __xfrm_route_forward(skb, family);
1163 }
1164
1165 static inline int xfrm4_route_forward(struct sk_buff *skb)
1166 {
1167 return xfrm_route_forward(skb, AF_INET);
1168 }
1169
1170 static inline int xfrm6_route_forward(struct sk_buff *skb)
1171 {
1172 return xfrm_route_forward(skb, AF_INET6);
1173 }
1174
1175 int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk);
1176
1177 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk)
1178 {
1179 sk->sk_policy[0] = NULL;
1180 sk->sk_policy[1] = NULL;
1181 if (unlikely(osk->sk_policy[0] || osk->sk_policy[1]))
1182 return __xfrm_sk_clone_policy(sk, osk);
1183 return 0;
1184 }
1185
1186 int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
1187
1188 static inline void xfrm_sk_free_policy(struct sock *sk)
1189 {
1190 struct xfrm_policy *pol;
1191
1192 pol = rcu_dereference_protected(sk->sk_policy[0], 1);
1193 if (unlikely(pol != NULL)) {
1194 xfrm_policy_delete(pol, XFRM_POLICY_MAX);
1195 sk->sk_policy[0] = NULL;
1196 }
1197 pol = rcu_dereference_protected(sk->sk_policy[1], 1);
1198 if (unlikely(pol != NULL)) {
1199 xfrm_policy_delete(pol, XFRM_POLICY_MAX+1);
1200 sk->sk_policy[1] = NULL;
1201 }
1202 }
1203
1204 #else
1205
1206 static inline void xfrm_sk_free_policy(struct sock *sk) {}
1207 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; }
1208 static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1209 static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1210 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1211 {
1212 return 1;
1213 }
1214 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1215 {
1216 return 1;
1217 }
1218 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1219 {
1220 return 1;
1221 }
1222 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1223 struct flowi *fl,
1224 unsigned int family)
1225 {
1226 return -ENOSYS;
1227 }
1228 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1229 struct sk_buff *skb)
1230 {
1231 return 1;
1232 }
1233 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1234 struct sk_buff *skb)
1235 {
1236 return 1;
1237 }
1238 #endif
1239
1240 static __inline__
1241 xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
1242 {
1243 switch (family){
1244 case AF_INET:
1245 return (xfrm_address_t *)&fl->u.ip4.daddr;
1246 case AF_INET6:
1247 return (xfrm_address_t *)&fl->u.ip6.daddr;
1248 }
1249 return NULL;
1250 }
1251
1252 static __inline__
1253 xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
1254 {
1255 switch (family){
1256 case AF_INET:
1257 return (xfrm_address_t *)&fl->u.ip4.saddr;
1258 case AF_INET6:
1259 return (xfrm_address_t *)&fl->u.ip6.saddr;
1260 }
1261 return NULL;
1262 }
1263
1264 static __inline__
1265 void xfrm_flowi_addr_get(const struct flowi *fl,
1266 xfrm_address_t *saddr, xfrm_address_t *daddr,
1267 unsigned short family)
1268 {
1269 switch(family) {
1270 case AF_INET:
1271 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1272 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
1273 break;
1274 case AF_INET6:
1275 saddr->in6 = fl->u.ip6.saddr;
1276 daddr->in6 = fl->u.ip6.daddr;
1277 break;
1278 }
1279 }
1280
1281 static __inline__ int
1282 __xfrm4_state_addr_check(const struct xfrm_state *x,
1283 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1284 {
1285 if (daddr->a4 == x->id.daddr.a4 &&
1286 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1287 return 1;
1288 return 0;
1289 }
1290
1291 static __inline__ int
1292 __xfrm6_state_addr_check(const struct xfrm_state *x,
1293 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1294 {
1295 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1296 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
1297 ipv6_addr_any((struct in6_addr *)saddr) ||
1298 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1299 return 1;
1300 return 0;
1301 }
1302
1303 static __inline__ int
1304 xfrm_state_addr_check(const struct xfrm_state *x,
1305 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1306 unsigned short family)
1307 {
1308 switch (family) {
1309 case AF_INET:
1310 return __xfrm4_state_addr_check(x, daddr, saddr);
1311 case AF_INET6:
1312 return __xfrm6_state_addr_check(x, daddr, saddr);
1313 }
1314 return 0;
1315 }
1316
1317 static __inline__ int
1318 xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
1319 unsigned short family)
1320 {
1321 switch (family) {
1322 case AF_INET:
1323 return __xfrm4_state_addr_check(x,
1324 (const xfrm_address_t *)&fl->u.ip4.daddr,
1325 (const xfrm_address_t *)&fl->u.ip4.saddr);
1326 case AF_INET6:
1327 return __xfrm6_state_addr_check(x,
1328 (const xfrm_address_t *)&fl->u.ip6.daddr,
1329 (const xfrm_address_t *)&fl->u.ip6.saddr);
1330 }
1331 return 0;
1332 }
1333
1334 static inline int xfrm_state_kern(const struct xfrm_state *x)
1335 {
1336 return atomic_read(&x->tunnel_users);
1337 }
1338
1339 static inline bool xfrm_id_proto_valid(u8 proto)
1340 {
1341 switch (proto) {
1342 case IPPROTO_AH:
1343 case IPPROTO_ESP:
1344 case IPPROTO_COMP:
1345 #if IS_ENABLED(CONFIG_IPV6)
1346 case IPPROTO_ROUTING:
1347 case IPPROTO_DSTOPTS:
1348 #endif
1349 return true;
1350 default:
1351 return false;
1352 }
1353 }
1354
1355 /* IPSEC_PROTO_ANY only matches 3 IPsec protocols, 0 could match all. */
1356 static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1357 {
1358 return (!userproto || proto == userproto ||
1359 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1360 proto == IPPROTO_ESP ||
1361 proto == IPPROTO_COMP)));
1362 }
1363
1364 /*
1365 * xfrm algorithm information
1366 */
1367 struct xfrm_algo_aead_info {
1368 char *geniv;
1369 u16 icv_truncbits;
1370 };
1371
1372 struct xfrm_algo_auth_info {
1373 u16 icv_truncbits;
1374 u16 icv_fullbits;
1375 };
1376
1377 struct xfrm_algo_encr_info {
1378 char *geniv;
1379 u16 blockbits;
1380 u16 defkeybits;
1381 };
1382
1383 struct xfrm_algo_comp_info {
1384 u16 threshold;
1385 };
1386
1387 struct xfrm_algo_desc {
1388 char *name;
1389 char *compat;
1390 u8 available:1;
1391 u8 pfkey_supported:1;
1392 union {
1393 struct xfrm_algo_aead_info aead;
1394 struct xfrm_algo_auth_info auth;
1395 struct xfrm_algo_encr_info encr;
1396 struct xfrm_algo_comp_info comp;
1397 } uinfo;
1398 struct sadb_alg desc;
1399 };
1400
1401 /* XFRM protocol handlers. */
1402 struct xfrm4_protocol {
1403 int (*handler)(struct sk_buff *skb);
1404 int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
1405 int encap_type);
1406 int (*cb_handler)(struct sk_buff *skb, int err);
1407 int (*err_handler)(struct sk_buff *skb, u32 info);
1408
1409 struct xfrm4_protocol __rcu *next;
1410 int priority;
1411 };
1412
1413 struct xfrm6_protocol {
1414 int (*handler)(struct sk_buff *skb);
1415 int (*cb_handler)(struct sk_buff *skb, int err);
1416 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1417 u8 type, u8 code, int offset, __be32 info);
1418
1419 struct xfrm6_protocol __rcu *next;
1420 int priority;
1421 };
1422
1423 /* XFRM tunnel handlers. */
1424 struct xfrm_tunnel {
1425 int (*handler)(struct sk_buff *skb);
1426 int (*err_handler)(struct sk_buff *skb, u32 info);
1427
1428 struct xfrm_tunnel __rcu *next;
1429 int priority;
1430 };
1431
1432 struct xfrm6_tunnel {
1433 int (*handler)(struct sk_buff *skb);
1434 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1435 u8 type, u8 code, int offset, __be32 info);
1436 struct xfrm6_tunnel __rcu *next;
1437 int priority;
1438 };
1439
1440 void xfrm_init(void);
1441 void xfrm4_init(void);
1442 int xfrm_state_init(struct net *net);
1443 void xfrm_state_fini(struct net *net);
1444 void xfrm4_state_init(void);
1445 void xfrm4_protocol_init(void);
1446 #ifdef CONFIG_XFRM
1447 int xfrm6_init(void);
1448 void xfrm6_fini(void);
1449 int xfrm6_state_init(void);
1450 void xfrm6_state_fini(void);
1451 int xfrm6_protocol_init(void);
1452 void xfrm6_protocol_fini(void);
1453 #else
1454 static inline int xfrm6_init(void)
1455 {
1456 return 0;
1457 }
1458 static inline void xfrm6_fini(void)
1459 {
1460 ;
1461 }
1462 #endif
1463
1464 #ifdef CONFIG_XFRM_STATISTICS
1465 int xfrm_proc_init(struct net *net);
1466 void xfrm_proc_fini(struct net *net);
1467 #endif
1468
1469 int xfrm_sysctl_init(struct net *net);
1470 #ifdef CONFIG_SYSCTL
1471 void xfrm_sysctl_fini(struct net *net);
1472 #else
1473 static inline void xfrm_sysctl_fini(struct net *net)
1474 {
1475 }
1476 #endif
1477
1478 void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
1479 struct xfrm_address_filter *filter);
1480 int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1481 int (*func)(struct xfrm_state *, int, void*), void *);
1482 void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net);
1483 struct xfrm_state *xfrm_state_alloc(struct net *net);
1484 void xfrm_state_free(struct xfrm_state *x);
1485 struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1486 const xfrm_address_t *saddr,
1487 const struct flowi *fl,
1488 struct xfrm_tmpl *tmpl,
1489 struct xfrm_policy *pol, int *err,
1490 unsigned short family, u32 if_id);
1491 struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, u32 if_id,
1492 xfrm_address_t *daddr,
1493 xfrm_address_t *saddr,
1494 unsigned short family,
1495 u8 mode, u8 proto, u32 reqid);
1496 struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
1497 unsigned short family);
1498 int xfrm_state_check_expire(struct xfrm_state *x);
1499 void xfrm_state_insert(struct xfrm_state *x);
1500 int xfrm_state_add(struct xfrm_state *x);
1501 int xfrm_state_update(struct xfrm_state *x);
1502 struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1503 const xfrm_address_t *daddr, __be32 spi,
1504 u8 proto, unsigned short family);
1505 struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1506 const xfrm_address_t *daddr,
1507 const xfrm_address_t *saddr,
1508 u8 proto,
1509 unsigned short family);
1510 #ifdef CONFIG_XFRM_SUB_POLICY
1511 int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1512 unsigned short family, struct net *net);
1513 int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1514 unsigned short family);
1515 #else
1516 static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1517 int n, unsigned short family, struct net *net)
1518 {
1519 return -ENOSYS;
1520 }
1521
1522 static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1523 int n, unsigned short family)
1524 {
1525 return -ENOSYS;
1526 }
1527 #endif
1528
1529 struct xfrmk_sadinfo {
1530 u32 sadhcnt; /* current hash bkts */
1531 u32 sadhmcnt; /* max allowed hash bkts */
1532 u32 sadcnt; /* current running count */
1533 };
1534
1535 struct xfrmk_spdinfo {
1536 u32 incnt;
1537 u32 outcnt;
1538 u32 fwdcnt;
1539 u32 inscnt;
1540 u32 outscnt;
1541 u32 fwdscnt;
1542 u32 spdhcnt;
1543 u32 spdhmcnt;
1544 };
1545
1546 struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1547 int xfrm_state_delete(struct xfrm_state *x);
1548 int xfrm_state_flush(struct net *net, u8 proto, bool task_valid, bool sync);
1549 int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid);
1550 void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1551 void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1552 u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1553 int xfrm_init_replay(struct xfrm_state *x);
1554 int xfrm_state_mtu(struct xfrm_state *x, int mtu);
1555 int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload);
1556 int xfrm_init_state(struct xfrm_state *x);
1557 int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
1558 int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
1559 int xfrm_trans_queue(struct sk_buff *skb,
1560 int (*finish)(struct net *, struct sock *,
1561 struct sk_buff *));
1562 int xfrm_output_resume(struct sk_buff *skb, int err);
1563 int xfrm_output(struct sock *sk, struct sk_buff *skb);
1564
1565 #if IS_ENABLED(CONFIG_NET_PKTGEN)
1566 int pktgen_xfrm_outer_mode_output(struct xfrm_state *x, struct sk_buff *skb);
1567 #endif
1568
1569 void xfrm_local_error(struct sk_buff *skb, int mtu);
1570 int xfrm4_extract_header(struct sk_buff *skb);
1571 int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1572 int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1573 int encap_type);
1574 int xfrm4_transport_finish(struct sk_buff *skb, int async);
1575 int xfrm4_rcv(struct sk_buff *skb);
1576 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1577
1578 static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1579 {
1580 XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
1581 XFRM_SPI_SKB_CB(skb)->family = AF_INET;
1582 XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
1583 return xfrm_input(skb, nexthdr, spi, 0);
1584 }
1585
1586 int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1587 int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1588 int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb);
1589 int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol);
1590 int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol);
1591 int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1592 int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
1593 void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
1594 int xfrm6_extract_header(struct sk_buff *skb);
1595 int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1596 int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi,
1597 struct ip6_tnl *t);
1598 int xfrm6_transport_finish(struct sk_buff *skb, int async);
1599 int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t);
1600 int xfrm6_rcv(struct sk_buff *skb);
1601 int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1602 xfrm_address_t *saddr, u8 proto);
1603 void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
1604 int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol);
1605 int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol);
1606 int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1607 int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
1608 __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1609 __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1610 int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1611 int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1612 int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb);
1613 int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1614 u8 **prevhdr);
1615
1616 #ifdef CONFIG_XFRM
1617 int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1618 int xfrm_user_policy(struct sock *sk, int optname,
1619 u8 __user *optval, int optlen);
1620 #else
1621 static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1622 {
1623 return -ENOPROTOOPT;
1624 }
1625
1626 static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
1627 {
1628 /* should not happen */
1629 kfree_skb(skb);
1630 return 0;
1631 }
1632 #endif
1633
1634 struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif,
1635 const xfrm_address_t *saddr,
1636 const xfrm_address_t *daddr,
1637 int family, u32 mark);
1638
1639 struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
1640
1641 void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1642 int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1643 int (*func)(struct xfrm_policy *, int, int, void*),
1644 void *);
1645 void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net);
1646 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
1647 struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, u32 if_id,
1648 u8 type, int dir,
1649 struct xfrm_selector *sel,
1650 struct xfrm_sec_ctx *ctx, int delete,
1651 int *err);
1652 struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u32 if_id, u8,
1653 int dir, u32 id, int delete, int *err);
1654 int xfrm_policy_flush(struct net *net, u8 type, bool task_valid);
1655 void xfrm_policy_hash_rebuild(struct net *net);
1656 u32 xfrm_get_acqseq(void);
1657 int verify_spi_info(u8 proto, u32 min, u32 max);
1658 int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
1659 struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark,
1660 u8 mode, u32 reqid, u32 if_id, u8 proto,
1661 const xfrm_address_t *daddr,
1662 const xfrm_address_t *saddr, int create,
1663 unsigned short family);
1664 int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
1665
1666 #ifdef CONFIG_XFRM_MIGRATE
1667 int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1668 const struct xfrm_migrate *m, int num_bundles,
1669 const struct xfrm_kmaddress *k,
1670 const struct xfrm_encap_tmpl *encap);
1671 struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net);
1672 struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
1673 struct xfrm_migrate *m,
1674 struct xfrm_encap_tmpl *encap);
1675 int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1676 struct xfrm_migrate *m, int num_bundles,
1677 struct xfrm_kmaddress *k, struct net *net,
1678 struct xfrm_encap_tmpl *encap);
1679 #endif
1680
1681 int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1682 void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1683 int km_report(struct net *net, u8 proto, struct xfrm_selector *sel,
1684 xfrm_address_t *addr);
1685
1686 void xfrm_input_init(void);
1687 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1688
1689 void xfrm_probe_algs(void);
1690 int xfrm_count_pfkey_auth_supported(void);
1691 int xfrm_count_pfkey_enc_supported(void);
1692 struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1693 struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1694 struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1695 struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1696 struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1697 struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1698 struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1699 struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1700 struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1701 int probe);
1702
1703 static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1704 const xfrm_address_t *b)
1705 {
1706 return ipv6_addr_equal((const struct in6_addr *)a,
1707 (const struct in6_addr *)b);
1708 }
1709
1710 static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1711 const xfrm_address_t *b,
1712 sa_family_t family)
1713 {
1714 switch (family) {
1715 default:
1716 case AF_INET:
1717 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1718 case AF_INET6:
1719 return xfrm6_addr_equal(a, b);
1720 }
1721 }
1722
1723 static inline int xfrm_policy_id2dir(u32 index)
1724 {
1725 return index & 7;
1726 }
1727
1728 #ifdef CONFIG_XFRM
1729 static inline int xfrm_aevent_is_on(struct net *net)
1730 {
1731 struct sock *nlsk;
1732 int ret = 0;
1733
1734 rcu_read_lock();
1735 nlsk = rcu_dereference(net->xfrm.nlsk);
1736 if (nlsk)
1737 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1738 rcu_read_unlock();
1739 return ret;
1740 }
1741
1742 static inline int xfrm_acquire_is_on(struct net *net)
1743 {
1744 struct sock *nlsk;
1745 int ret = 0;
1746
1747 rcu_read_lock();
1748 nlsk = rcu_dereference(net->xfrm.nlsk);
1749 if (nlsk)
1750 ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE);
1751 rcu_read_unlock();
1752
1753 return ret;
1754 }
1755 #endif
1756
1757 static inline unsigned int aead_len(struct xfrm_algo_aead *alg)
1758 {
1759 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1760 }
1761
1762 static inline unsigned int xfrm_alg_len(const struct xfrm_algo *alg)
1763 {
1764 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1765 }
1766
1767 static inline unsigned int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
1768 {
1769 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1770 }
1771
1772 static inline unsigned int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1773 {
1774 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1775 }
1776
1777 #ifdef CONFIG_XFRM_MIGRATE
1778 static inline int xfrm_replay_clone(struct xfrm_state *x,
1779 struct xfrm_state *orig)
1780 {
1781 x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
1782 GFP_KERNEL);
1783 if (!x->replay_esn)
1784 return -ENOMEM;
1785
1786 x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
1787 x->replay_esn->replay_window = orig->replay_esn->replay_window;
1788
1789 x->preplay_esn = kmemdup(x->replay_esn,
1790 xfrm_replay_state_esn_len(x->replay_esn),
1791 GFP_KERNEL);
1792 if (!x->preplay_esn) {
1793 kfree(x->replay_esn);
1794 return -ENOMEM;
1795 }
1796
1797 return 0;
1798 }
1799
1800 static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig)
1801 {
1802 return kmemdup(orig, aead_len(orig), GFP_KERNEL);
1803 }
1804
1805
1806 static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1807 {
1808 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
1809 }
1810
1811 static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1812 {
1813 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1814 }
1815
1816 static inline void xfrm_states_put(struct xfrm_state **states, int n)
1817 {
1818 int i;
1819 for (i = 0; i < n; i++)
1820 xfrm_state_put(*(states + i));
1821 }
1822
1823 static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1824 {
1825 int i;
1826 for (i = 0; i < n; i++)
1827 xfrm_state_delete(*(states + i));
1828 }
1829 #endif
1830
1831 #ifdef CONFIG_XFRM
1832 static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1833 {
1834 struct sec_path *sp = skb_sec_path(skb);
1835
1836 return sp->xvec[sp->len - 1];
1837 }
1838 #endif
1839
1840 static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb)
1841 {
1842 #ifdef CONFIG_XFRM
1843 struct sec_path *sp = skb_sec_path(skb);
1844
1845 if (!sp || !sp->olen || sp->len != sp->olen)
1846 return NULL;
1847
1848 return &sp->ovec[sp->olen - 1];
1849 #else
1850 return NULL;
1851 #endif
1852 }
1853
1854 void __init xfrm_dev_init(void);
1855
1856 #ifdef CONFIG_XFRM_OFFLOAD
1857 void xfrm_dev_resume(struct sk_buff *skb);
1858 void xfrm_dev_backlog(struct softnet_data *sd);
1859 struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again);
1860 int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
1861 struct xfrm_user_offload *xuo);
1862 bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x);
1863
1864 static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
1865 {
1866 struct xfrm_state_offload *xso = &x->xso;
1867
1868 if (xso->dev && xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn)
1869 xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn(x);
1870 }
1871
1872 static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
1873 {
1874 struct xfrm_state *x = dst->xfrm;
1875 struct xfrm_dst *xdst;
1876
1877 if (!x || !x->type_offload)
1878 return false;
1879
1880 xdst = (struct xfrm_dst *) dst;
1881 if (!x->xso.offload_handle && !xdst->child->xfrm)
1882 return true;
1883 if (x->xso.offload_handle && (x->xso.dev == xfrm_dst_path(dst)->dev) &&
1884 !xdst->child->xfrm)
1885 return true;
1886
1887 return false;
1888 }
1889
1890 static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1891 {
1892 struct xfrm_state_offload *xso = &x->xso;
1893
1894 if (xso->dev)
1895 xso->dev->xfrmdev_ops->xdo_dev_state_delete(x);
1896 }
1897
1898 static inline void xfrm_dev_state_free(struct xfrm_state *x)
1899 {
1900 struct xfrm_state_offload *xso = &x->xso;
1901 struct net_device *dev = xso->dev;
1902
1903 if (dev && dev->xfrmdev_ops) {
1904 if (dev->xfrmdev_ops->xdo_dev_state_free)
1905 dev->xfrmdev_ops->xdo_dev_state_free(x);
1906 xso->dev = NULL;
1907 dev_put(dev);
1908 }
1909 }
1910 #else
1911 static inline void xfrm_dev_resume(struct sk_buff *skb)
1912 {
1913 }
1914
1915 static inline void xfrm_dev_backlog(struct softnet_data *sd)
1916 {
1917 }
1918
1919 static inline struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again)
1920 {
1921 return skb;
1922 }
1923
1924 static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo)
1925 {
1926 return 0;
1927 }
1928
1929 static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1930 {
1931 }
1932
1933 static inline void xfrm_dev_state_free(struct xfrm_state *x)
1934 {
1935 }
1936
1937 static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x)
1938 {
1939 return false;
1940 }
1941
1942 static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
1943 {
1944 }
1945
1946 static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
1947 {
1948 return false;
1949 }
1950 #endif
1951
1952 static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1953 {
1954 if (attrs[XFRMA_MARK])
1955 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
1956 else
1957 m->v = m->m = 0;
1958
1959 return m->v & m->m;
1960 }
1961
1962 static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
1963 {
1964 int ret = 0;
1965
1966 if (m->m | m->v)
1967 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
1968 return ret;
1969 }
1970
1971 static inline __u32 xfrm_smark_get(__u32 mark, struct xfrm_state *x)
1972 {
1973 struct xfrm_mark *m = &x->props.smark;
1974
1975 return (m->v & m->m) | (mark & ~m->m);
1976 }
1977
1978 static inline int xfrm_if_id_put(struct sk_buff *skb, __u32 if_id)
1979 {
1980 int ret = 0;
1981
1982 if (if_id)
1983 ret = nla_put_u32(skb, XFRMA_IF_ID, if_id);
1984 return ret;
1985 }
1986
1987 static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x,
1988 unsigned int family)
1989 {
1990 bool tunnel = false;
1991
1992 switch(family) {
1993 case AF_INET:
1994 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4)
1995 tunnel = true;
1996 break;
1997 case AF_INET6:
1998 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6)
1999 tunnel = true;
2000 break;
2001 }
2002 if (tunnel && !(x->outer_mode.flags & XFRM_MODE_FLAG_TUNNEL))
2003 return -EINVAL;
2004
2005 return 0;
2006 }
2007 #endif /* _NET_XFRM_H */
Linux with added FPC-III support