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Merge branch 'master' of ssh://master.kernel.org/pub/scm/linux/kernel/git/torvalds...
[linux-2.6-block.git] / include / linux / rtnetlink.h
CommitLineData
1da177e4
LT		 1#ifndef __LINUX_RTNETLINK_H
2#define __LINUX_RTNETLINK_H
3
541c94f1 4#include <linux/types.h>
1da177e4 5#include <linux/netlink.h>
cbde1668 6#include <linux/if_link.h>
e07bca84
TG		 7#include <linux/if_addr.h>
8#include <linux/neighbour.h>
1da177e4
LT		 9
10/****
11 * Routing/neighbour discovery messages.
12 ****/
13
14/* Types of messages */
15
16enum {
17 RTM_BASE = 16,
18#define RTM_BASE RTM_BASE
19
20 RTM_NEWLINK = 16,
21#define RTM_NEWLINK RTM_NEWLINK
22 RTM_DELLINK,
23#define RTM_DELLINK RTM_DELLINK
24 RTM_GETLINK,
25#define RTM_GETLINK RTM_GETLINK
26 RTM_SETLINK,
27#define RTM_SETLINK RTM_SETLINK
28
29 RTM_NEWADDR = 20,
30#define RTM_NEWADDR RTM_NEWADDR
31 RTM_DELADDR,
32#define RTM_DELADDR RTM_DELADDR
33 RTM_GETADDR,
34#define RTM_GETADDR RTM_GETADDR
35
36 RTM_NEWROUTE = 24,
37#define RTM_NEWROUTE RTM_NEWROUTE
38 RTM_DELROUTE,
39#define RTM_DELROUTE RTM_DELROUTE
40 RTM_GETROUTE,
41#define RTM_GETROUTE RTM_GETROUTE
42
43 RTM_NEWNEIGH = 28,
44#define RTM_NEWNEIGH RTM_NEWNEIGH
45 RTM_DELNEIGH,
46#define RTM_DELNEIGH RTM_DELNEIGH
47 RTM_GETNEIGH,
48#define RTM_GETNEIGH RTM_GETNEIGH
49
50 RTM_NEWRULE = 32,
51#define RTM_NEWRULE RTM_NEWRULE
52 RTM_DELRULE,
53#define RTM_DELRULE RTM_DELRULE
54 RTM_GETRULE,
55#define RTM_GETRULE RTM_GETRULE
56
57 RTM_NEWQDISC = 36,
58#define RTM_NEWQDISC RTM_NEWQDISC
59 RTM_DELQDISC,
60#define RTM_DELQDISC RTM_DELQDISC
61 RTM_GETQDISC,
62#define RTM_GETQDISC RTM_GETQDISC
63
64 RTM_NEWTCLASS = 40,
65#define RTM_NEWTCLASS RTM_NEWTCLASS
66 RTM_DELTCLASS,
67#define RTM_DELTCLASS RTM_DELTCLASS
68 RTM_GETTCLASS,
69#define RTM_GETTCLASS RTM_GETTCLASS
70
71 RTM_NEWTFILTER = 44,
72#define RTM_NEWTFILTER RTM_NEWTFILTER
73 RTM_DELTFILTER,
74#define RTM_DELTFILTER RTM_DELTFILTER
75 RTM_GETTFILTER,
76#define RTM_GETTFILTER RTM_GETTFILTER
77
78 RTM_NEWACTION = 48,
79#define RTM_NEWACTION RTM_NEWACTION
80 RTM_DELACTION,
81#define RTM_DELACTION RTM_DELACTION
82 RTM_GETACTION,
83#define RTM_GETACTION RTM_GETACTION
84
85 RTM_NEWPREFIX = 52,
86#define RTM_NEWPREFIX RTM_NEWPREFIX
1da177e4
LT		 87
88 RTM_GETMULTICAST = 58,
89#define RTM_GETMULTICAST RTM_GETMULTICAST
90
91 RTM_GETANYCAST = 62,
92#define RTM_GETANYCAST RTM_GETANYCAST
93
c7fb64db
TG		 94 RTM_NEWNEIGHTBL = 64,
95#define RTM_NEWNEIGHTBL RTM_NEWNEIGHTBL
96 RTM_GETNEIGHTBL = 66,
97#define RTM_GETNEIGHTBL RTM_GETNEIGHTBL
98 RTM_SETNEIGHTBL,
99#define RTM_SETNEIGHTBL RTM_SETNEIGHTBL
100
31910575
PY		 101 RTM_NEWNDUSEROPT = 68,
102#define RTM_NEWNDUSEROPT RTM_NEWNDUSEROPT
103
2a8cc6c8
YH		 104 RTM_NEWADDRLABEL = 72,
105#define RTM_NEWADDRLABEL RTM_NEWADDRLABEL
106 RTM_DELADDRLABEL,
107#define RTM_NEWADDRLABEL RTM_NEWADDRLABEL
108 RTM_GETADDRLABEL,
109#define RTM_GETADDRLABEL RTM_GETADDRLABEL
110
2f90b865
AD		 111 RTM_GETDCB = 78,
112#define RTM_GETDCB RTM_GETDCB
113 RTM_SETDCB,
114#define RTM_SETDCB RTM_SETDCB
115
d775fc09
TG		 116 __RTM_MAX,
117#define RTM_MAX (((__RTM_MAX + 3) & ~3) - 1)
1da177e4
LT		 118};
119
db46edc6
TG		 120#define RTM_NR_MSGTYPES (RTM_MAX + 1 - RTM_BASE)
121#define RTM_NR_FAMILIES (RTM_NR_MSGTYPES >> 2)
f90a0a74
TG		 122#define RTM_FAM(cmd) (((cmd) - RTM_BASE) >> 2)
123
1da177e4
LT		 124/*
125 Generic structure for encapsulation of optional route information.
126 It is reminiscent of sockaddr, but with sa_family replaced
127 with attribute type.
128 */
129
130struct rtattr
131{
132 unsigned short rta_len;
133 unsigned short rta_type;
134};
135
136/* Macros to handle rtattributes */
137
138#define RTA_ALIGNTO 4
139#define RTA_ALIGN(len) ( ((len)+RTA_ALIGNTO-1) & ~(RTA_ALIGNTO-1) )
140#define RTA_OK(rta,len) ((len) >= (int)sizeof(struct rtattr) && \
141 (rta)->rta_len >= sizeof(struct rtattr) && \
142 (rta)->rta_len <= (len))
143#define RTA_NEXT(rta,attrlen) ((attrlen) -= RTA_ALIGN((rta)->rta_len), \
144 (struct rtattr*)(((char*)(rta)) + RTA_ALIGN((rta)->rta_len)))
145#define RTA_LENGTH(len) (RTA_ALIGN(sizeof(struct rtattr)) + (len))
146#define RTA_SPACE(len) RTA_ALIGN(RTA_LENGTH(len))
147#define RTA_DATA(rta) ((void*)(((char*)(rta)) + RTA_LENGTH(0)))
148#define RTA_PAYLOAD(rta) ((int)((rta)->rta_len) - RTA_LENGTH(0))
149
150
151
152
153/******************************************************************************
154 * Definitions used in routing table administration.
155 ****/
156
157struct rtmsg
158{
159 unsigned char rtm_family;
160 unsigned char rtm_dst_len;
161 unsigned char rtm_src_len;
162 unsigned char rtm_tos;
163
164 unsigned char rtm_table; /* Routing table id */
165 unsigned char rtm_protocol; /* Routing protocol; see below */
166 unsigned char rtm_scope; /* See below */
167 unsigned char rtm_type; /* See below */
168
169 unsigned rtm_flags;
170};
171
172/* rtm_type */
173
174enum
175{
176 RTN_UNSPEC,
177 RTN_UNICAST, /* Gateway or direct route */
178 RTN_LOCAL, /* Accept locally */
179 RTN_BROADCAST, /* Accept locally as broadcast,
180 send as broadcast */
181 RTN_ANYCAST, /* Accept locally as broadcast,
182 but send as unicast */
183 RTN_MULTICAST, /* Multicast route */
184 RTN_BLACKHOLE, /* Drop */
185 RTN_UNREACHABLE, /* Destination is unreachable */
186 RTN_PROHIBIT, /* Administratively prohibited */
187 RTN_THROW, /* Not in this table */
188 RTN_NAT, /* Translate this address */
189 RTN_XRESOLVE, /* Use external resolver */
190 __RTN_MAX
191};
192
193#define RTN_MAX (__RTN_MAX - 1)
194
195
196/* rtm_protocol */
197
198#define RTPROT_UNSPEC 0
199#define RTPROT_REDIRECT 1 /* Route installed by ICMP redirects;
200 not used by current IPv4 */
201#define RTPROT_KERNEL 2 /* Route installed by kernel */
202#define RTPROT_BOOT 3 /* Route installed during boot */
203#define RTPROT_STATIC 4 /* Route installed by administrator */
204
205/* Values of protocol >= RTPROT_STATIC are not interpreted by kernel;
206 they are just passed from user and back as is.
207 It will be used by hypothetical multiple routing daemons.
208 Note that protocol values should be standardized in order to
209 avoid conflicts.
210 */
211
212#define RTPROT_GATED 8 /* Apparently, GateD */
213#define RTPROT_RA 9 /* RDISC/ND router advertisements */
214#define RTPROT_MRT 10 /* Merit MRT */
215#define RTPROT_ZEBRA 11 /* Zebra */
216#define RTPROT_BIRD 12 /* BIRD */
217#define RTPROT_DNROUTED 13 /* DECnet routing daemon */
218#define RTPROT_XORP 14 /* XORP */
99cae7fc 219#define RTPROT_NTK 15 /* Netsukuku */
2e1ab634 220#define RTPROT_DHCP 16 /* DHCP client */
1da177e4
LT		 221
222/* rtm_scope
223
224 Really it is not scope, but sort of distance to the destination.
225 NOWHERE are reserved for not existing destinations, HOST is our
226 local addresses, LINK are destinations, located on directly attached
227 link and UNIVERSE is everywhere in the Universe.
228
229 Intermediate values are also possible f.e. interior routes
230 could be assigned a value between UNIVERSE and LINK.
231*/
232
233enum rt_scope_t
234{
235 RT_SCOPE_UNIVERSE=0,
236/* User defined values */
237 RT_SCOPE_SITE=200,
238 RT_SCOPE_LINK=253,
239 RT_SCOPE_HOST=254,
240 RT_SCOPE_NOWHERE=255
241};
242
243/* rtm_flags */
244
245#define RTM_F_NOTIFY 0x100 /* Notify user of route change */
246#define RTM_F_CLONED 0x200 /* This route is cloned */
247#define RTM_F_EQUALIZE 0x400 /* Multipath equalizer: NI */
248#define RTM_F_PREFIX 0x800 /* Prefix addresses */
249
250/* Reserved table identifiers */
251
252enum rt_class_t
253{
254 RT_TABLE_UNSPEC=0,
255/* User defined values */
709772e6 256 RT_TABLE_COMPAT=252,
1da177e4
LT		 257 RT_TABLE_DEFAULT=253,
258 RT_TABLE_MAIN=254,
259 RT_TABLE_LOCAL=255,
b801f549 260 RT_TABLE_MAX=0xFFFFFFFF
1da177e4 261};
1da177e4
LT		 262
263
264/* Routing message attributes */
265
266enum rtattr_type_t
267{
268 RTA_UNSPEC,
269 RTA_DST,
270 RTA_SRC,
271 RTA_IIF,
272 RTA_OIF,
273 RTA_GATEWAY,
274 RTA_PRIORITY,
275 RTA_PREFSRC,
276 RTA_METRICS,
277 RTA_MULTIPATH,
1f9d11c7 278 RTA_PROTOINFO, /* no longer used */
1da177e4
LT		 279 RTA_FLOW,
280 RTA_CACHEINFO,
1f9d11c7 281 RTA_SESSION, /* no longer used */
e06e7c61 282 RTA_MP_ALGO, /* no longer used */
9e762a4a 283 RTA_TABLE,
1da177e4
LT		 284 __RTA_MAX
285};
286
287#define RTA_MAX (__RTA_MAX - 1)
288
289#define RTM_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct rtmsg))))
290#define RTM_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct rtmsg))
291
292/* RTM_MULTIPATH --- array of struct rtnexthop.
293 *
294 * "struct rtnexthop" describes all necessary nexthop information,
295 * i.e. parameters of path to a destination via this nexthop.
296 *
297 * At the moment it is impossible to set different prefsrc, mtu, window
298 * and rtt for different paths from multipath.
299 */
300
301struct rtnexthop
302{
303 unsigned short rtnh_len;
304 unsigned char rtnh_flags;
305 unsigned char rtnh_hops;
306 int rtnh_ifindex;
307};
308
309/* rtnh_flags */
310
311#define RTNH_F_DEAD 1 /* Nexthop is dead (used by multipath) */
312#define RTNH_F_PERVASIVE 2 /* Do recursive gateway lookup */
313#define RTNH_F_ONLINK 4 /* Gateway is forced on link */
314
315/* Macros to handle hexthops */
316
317#define RTNH_ALIGNTO 4
318#define RTNH_ALIGN(len) ( ((len)+RTNH_ALIGNTO-1) & ~(RTNH_ALIGNTO-1) )
319#define RTNH_OK(rtnh,len) ((rtnh)->rtnh_len >= sizeof(struct rtnexthop) && \
320 ((int)(rtnh)->rtnh_len) <= (len))
321#define RTNH_NEXT(rtnh) ((struct rtnexthop*)(((char*)(rtnh)) + RTNH_ALIGN((rtnh)->rtnh_len)))
322#define RTNH_LENGTH(len) (RTNH_ALIGN(sizeof(struct rtnexthop)) + (len))
323#define RTNH_SPACE(len) RTNH_ALIGN(RTNH_LENGTH(len))
324#define RTNH_DATA(rtnh) ((struct rtattr*)(((char*)(rtnh)) + RTNH_LENGTH(0)))
325
326/* RTM_CACHEINFO */
327
328struct rta_cacheinfo
329{
330 __u32 rta_clntref;
331 __u32 rta_lastuse;
332 __s32 rta_expires;
333 __u32 rta_error;
334 __u32 rta_used;
335
336#define RTNETLINK_HAVE_PEERINFO 1
337 __u32 rta_id;
338 __u32 rta_ts;
339 __u32 rta_tsage;
340};
341
342/* RTM_METRICS --- array of struct rtattr with types of RTAX_* */
343
344enum
345{
346 RTAX_UNSPEC,
347#define RTAX_UNSPEC RTAX_UNSPEC
348 RTAX_LOCK,
349#define RTAX_LOCK RTAX_LOCK
350 RTAX_MTU,
351#define RTAX_MTU RTAX_MTU
352 RTAX_WINDOW,
353#define RTAX_WINDOW RTAX_WINDOW
354 RTAX_RTT,
355#define RTAX_RTT RTAX_RTT
356 RTAX_RTTVAR,
357#define RTAX_RTTVAR RTAX_RTTVAR
358 RTAX_SSTHRESH,
359#define RTAX_SSTHRESH RTAX_SSTHRESH
360 RTAX_CWND,
361#define RTAX_CWND RTAX_CWND
362 RTAX_ADVMSS,
363#define RTAX_ADVMSS RTAX_ADVMSS
364 RTAX_REORDERING,
365#define RTAX_REORDERING RTAX_REORDERING
366 RTAX_HOPLIMIT,
367#define RTAX_HOPLIMIT RTAX_HOPLIMIT
368 RTAX_INITCWND,
369#define RTAX_INITCWND RTAX_INITCWND
370 RTAX_FEATURES,
371#define RTAX_FEATURES RTAX_FEATURES
05bb1fad
DM		 372 RTAX_RTO_MIN,
373#define RTAX_RTO_MIN RTAX_RTO_MIN
1da177e4
LT		 374 __RTAX_MAX
375};
376
377#define RTAX_MAX (__RTAX_MAX - 1)
378
379#define RTAX_FEATURE_ECN 0x00000001
380#define RTAX_FEATURE_SACK 0x00000002
381#define RTAX_FEATURE_TIMESTAMP 0x00000004
382#define RTAX_FEATURE_ALLFRAG 0x00000008
383
384struct rta_session
385{
386 __u8 proto;
8a47077a
PM		 387 __u8 pad1;
388 __u16 pad2;
1da177e4
LT		 389
390 union {
391 struct {
392 __u16 sport;
393 __u16 dport;
394 } ports;
395
396 struct {
397 __u8 type;
398 __u8 code;
399 __u16 ident;
400 } icmpt;
401
402 __u32 spi;
403 } u;
404};
405
1da177e4
LT		 406/****
407 * General form of address family dependent message.
408 ****/
409
410struct rtgenmsg
411{
412 unsigned char rtgen_family;
413};
414
415/*****************************************************************
416 * Link layer specific messages.
417 ****/
418
419/* struct ifinfomsg
420 * passes link level specific information, not dependent
421 * on network protocol.
422 */
423
424struct ifinfomsg
425{
426 unsigned char ifi_family;
427 unsigned char __ifi_pad;
428 unsigned short ifi_type; /* ARPHRD_* */
429 int ifi_index; /* Link index */
430 unsigned ifi_flags; /* IFF_* flags */
431 unsigned ifi_change; /* IFF_* change mask */
432};
433
434/********************************************************************
435 * prefix information
436 ****/
437
438struct prefixmsg
439{
440 unsigned char prefix_family;
8a47077a
PM		 441 unsigned char prefix_pad1;
442 unsigned short prefix_pad2;
1da177e4
LT		 443 int prefix_ifindex;
444 unsigned char prefix_type;
445 unsigned char prefix_len;
446 unsigned char prefix_flags;
8a47077a 447 unsigned char prefix_pad3;
1da177e4
LT		 448};
449
450enum
451{
452 PREFIX_UNSPEC,
453 PREFIX_ADDRESS,
454 PREFIX_CACHEINFO,
455 __PREFIX_MAX
456};
457
458#define PREFIX_MAX (__PREFIX_MAX - 1)
459
460struct prefix_cacheinfo
461{
462 __u32 preferred_time;
463 __u32 valid_time;
464};
465
1da177e4
LT		 466
467/*****************************************************************
468 * Traffic control messages.
469 ****/
470
471struct tcmsg
472{
473 unsigned char tcm_family;
474 unsigned char tcm__pad1;
475 unsigned short tcm__pad2;
476 int tcm_ifindex;
477 __u32 tcm_handle;
478 __u32 tcm_parent;
479 __u32 tcm_info;
480};
481
482enum
483{
484 TCA_UNSPEC,
485 TCA_KIND,
486 TCA_OPTIONS,
487 TCA_STATS,
488 TCA_XSTATS,
489 TCA_RATE,
490 TCA_FCNT,
491 TCA_STATS2,
175f9c1b 492 TCA_STAB,
1da177e4
LT		 493 __TCA_MAX
494};
495
496#define TCA_MAX (__TCA_MAX - 1)
497
498#define TCA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcmsg))))
499#define TCA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcmsg))
500
31910575
PY		 501/********************************************************************
502 * Neighbor Discovery userland options
503 ****/
504
505struct nduseroptmsg
506{
507 unsigned char nduseropt_family;
508 unsigned char nduseropt_pad1;
509 unsigned short nduseropt_opts_len; /* Total length of options */
dbb2ed24 510 int nduseropt_ifindex;
31910575
PY		 511 __u8 nduseropt_icmp_type;
512 __u8 nduseropt_icmp_code;
513 unsigned short nduseropt_pad2;
dbb2ed24 514 unsigned int nduseropt_pad3;
31910575
PY		 515 /* Followed by one or more ND options */
516};
517
518enum
519{
520 NDUSEROPT_UNSPEC,
521 NDUSEROPT_SRCADDR,
522 __NDUSEROPT_MAX
523};
524
525#define NDUSEROPT_MAX (__NDUSEROPT_MAX - 1)
526
ac6d439d
PM		 527#ifndef __KERNEL__
528/* RTnetlink multicast groups - backwards compatibility for userspace */
1da177e4
LT		 529#define RTMGRP_LINK 1
530#define RTMGRP_NOTIFY 2
531#define RTMGRP_NEIGH 4
532#define RTMGRP_TC 8
533
534#define RTMGRP_IPV4_IFADDR 0x10
535#define RTMGRP_IPV4_MROUTE 0x20
536#define RTMGRP_IPV4_ROUTE 0x40
a5cdc030 537#define RTMGRP_IPV4_RULE 0x80
1da177e4
LT		 538
539#define RTMGRP_IPV6_IFADDR 0x100
540#define RTMGRP_IPV6_MROUTE 0x200
541#define RTMGRP_IPV6_ROUTE 0x400
542#define RTMGRP_IPV6_IFINFO 0x800
543
544#define RTMGRP_DECnet_IFADDR 0x1000
545#define RTMGRP_DECnet_ROUTE 0x4000
546
547#define RTMGRP_IPV6_PREFIX 0x20000
ac6d439d
PM		 548#endif
549
550/* RTnetlink multicast groups */
551enum rtnetlink_groups {
552 RTNLGRP_NONE,
553#define RTNLGRP_NONE RTNLGRP_NONE
554 RTNLGRP_LINK,
555#define RTNLGRP_LINK RTNLGRP_LINK
556 RTNLGRP_NOTIFY,
557#define RTNLGRP_NOTIFY RTNLGRP_NOTIFY
558 RTNLGRP_NEIGH,
559#define RTNLGRP_NEIGH RTNLGRP_NEIGH
560 RTNLGRP_TC,
561#define RTNLGRP_TC RTNLGRP_TC
562 RTNLGRP_IPV4_IFADDR,
563#define RTNLGRP_IPV4_IFADDR RTNLGRP_IPV4_IFADDR
564 RTNLGRP_IPV4_MROUTE,
565#define RTNLGRP_IPV4_MROUTE RTNLGRP_IPV4_MROUTE
566 RTNLGRP_IPV4_ROUTE,
567#define RTNLGRP_IPV4_ROUTE RTNLGRP_IPV4_ROUTE
a5cdc030
PM		 568 RTNLGRP_IPV4_RULE,
569#define RTNLGRP_IPV4_RULE RTNLGRP_IPV4_RULE
ac6d439d
PM		 570 RTNLGRP_IPV6_IFADDR,
571#define RTNLGRP_IPV6_IFADDR RTNLGRP_IPV6_IFADDR
572 RTNLGRP_IPV6_MROUTE,
573#define RTNLGRP_IPV6_MROUTE RTNLGRP_IPV6_MROUTE
574 RTNLGRP_IPV6_ROUTE,
575#define RTNLGRP_IPV6_ROUTE RTNLGRP_IPV6_ROUTE
576 RTNLGRP_IPV6_IFINFO,
577#define RTNLGRP_IPV6_IFINFO RTNLGRP_IPV6_IFINFO
578 RTNLGRP_DECnet_IFADDR,
579#define RTNLGRP_DECnet_IFADDR RTNLGRP_DECnet_IFADDR
6b80ebed 580 RTNLGRP_NOP2,
ac6d439d
PM		 581 RTNLGRP_DECnet_ROUTE,
582#define RTNLGRP_DECnet_ROUTE RTNLGRP_DECnet_ROUTE
a8731cbf
SW		 583 RTNLGRP_DECnet_RULE,
584#define RTNLGRP_DECnet_RULE RTNLGRP_DECnet_RULE
6b80ebed 585 RTNLGRP_NOP4,
ac6d439d
PM		 586 RTNLGRP_IPV6_PREFIX,
587#define RTNLGRP_IPV6_PREFIX RTNLGRP_IPV6_PREFIX
101367c2
TG		 588 RTNLGRP_IPV6_RULE,
589#define RTNLGRP_IPV6_RULE RTNLGRP_IPV6_RULE
31910575
PY		 590 RTNLGRP_ND_USEROPT,
591#define RTNLGRP_ND_USEROPT RTNLGRP_ND_USEROPT
bce7b154
RDC		 592 RTNLGRP_PHONET_IFADDR,
593#define RTNLGRP_PHONET_IFADDR RTNLGRP_PHONET_IFADDR
594 RTNLGRP_PHONET_ROUTE,
595#define RTNLGRP_PHONET_ROUTE RTNLGRP_PHONET_ROUTE
ac6d439d
PM		 596 __RTNLGRP_MAX
597};
598#define RTNLGRP_MAX (__RTNLGRP_MAX - 1)
1da177e4
LT		 599
600/* TC action piece */
601struct tcamsg
602{
603 unsigned char tca_family;
604 unsigned char tca__pad1;
605 unsigned short tca__pad2;
606};
607#define TA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcamsg))))
608#define TA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcamsg))
609#define TCA_ACT_TAB 1 /* attr type must be >=1 */
610#define TCAA_MAX 1
611
612/* End of information exported to user level */
613
614#ifdef __KERNEL__
615
6756ae4b 616#include <linux/mutex.h>
1da177e4 617
1da177e4
LT		 618static __inline__ int rtattr_strcmp(const struct rtattr *rta, const char *str)
619{
620 int len = strlen(str) + 1;
621 return len > rta->rta_len || memcmp(RTA_DATA(rta), str, len);
622}
623
97c53cac
DL		 624extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo);
625extern int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid);
1ce85fe4
PNA		 626extern void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid,
627 u32 group, struct nlmsghdr *nlh, gfp_t flags);
97c53cac 628extern void rtnl_set_sk_err(struct net *net, u32 group, int error);
1da177e4 629extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics);
e3703b3d
TG		 630extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst,
631 u32 id, u32 ts, u32 tsage, long expires,
632 u32 error);
1da177e4
LT		 633
634extern void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data);
635
636#define RTA_PUT(skb, attrtype, attrlen, data) \
637({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
638 goto rtattr_failure; \
639 __rta_fill(skb, attrtype, attrlen, data); })
640
d675c989 641#define RTA_APPEND(skb, attrlen, data) \
1da177e4
LT		 642({ if (unlikely(skb_tailroom(skb) < (int)(attrlen))) \
643 goto rtattr_failure; \
d675c989
TG		 644 memcpy(skb_put(skb, attrlen), data, attrlen); })
645
646#define RTA_PUT_NOHDR(skb, attrlen, data) \
b3563c4f 647({ RTA_APPEND(skb, RTA_ALIGN(attrlen), data); \
27a884dc 648 memset(skb_tail_pointer(skb) - (RTA_ALIGN(attrlen) - attrlen), 0, \
b3563c4f 649 RTA_ALIGN(attrlen) - attrlen); })
00768244 650
8f48bcd4
TG		 651#define RTA_PUT_U8(skb, attrtype, value) \
652({ u8 _tmp = (value); \
653 RTA_PUT(skb, attrtype, sizeof(u8), &_tmp); })
654
655#define RTA_PUT_U16(skb, attrtype, value) \
656({ u16 _tmp = (value); \
657 RTA_PUT(skb, attrtype, sizeof(u16), &_tmp); })
658
00768244
TG		 659#define RTA_PUT_U32(skb, attrtype, value) \
660({ u32 _tmp = (value); \
661 RTA_PUT(skb, attrtype, sizeof(u32), &_tmp); })
662
663#define RTA_PUT_U64(skb, attrtype, value) \
664({ u64 _tmp = (value); \
665 RTA_PUT(skb, attrtype, sizeof(u64), &_tmp); })
666
667#define RTA_PUT_SECS(skb, attrtype, value) \
668 RTA_PUT_U64(skb, attrtype, (value) / HZ)
669
670#define RTA_PUT_MSECS(skb, attrtype, value) \
671 RTA_PUT_U64(skb, attrtype, jiffies_to_msecs(value))
672
673#define RTA_PUT_STRING(skb, attrtype, value) \
674 RTA_PUT(skb, attrtype, strlen(value) + 1, value)
675
8f48bcd4
TG		 676#define RTA_PUT_FLAG(skb, attrtype) \
677 RTA_PUT(skb, attrtype, 0, NULL);
678
00768244 679#define RTA_NEST(skb, type) \
27a884dc 680({ struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \
00768244
TG		 681 RTA_PUT(skb, type, 0, NULL); \
682 __start; })
683
684#define RTA_NEST_END(skb, start) \
27a884dc 685({ (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \
00768244
TG		 686 (skb)->len; })
687
afdc3238
PM		 688#define RTA_NEST_COMPAT(skb, type, attrlen, data) \
689({ struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \
690 RTA_PUT(skb, type, attrlen, data); \
691 RTA_NEST(skb, type); \
692 __start; })
693
694#define RTA_NEST_COMPAT_END(skb, start) \
695({ struct rtattr *__nest = (void *)(start) + NLMSG_ALIGN((start)->rta_len); \
696 (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \
697 RTA_NEST_END(skb, __nest); \
698 (skb)->len; })
699
00768244 700#define RTA_NEST_CANCEL(skb, start) \
c52a3f89
TG		 701({ if (start) \
702 skb_trim(skb, (unsigned char *) (start) - (skb)->data); \
00768244
TG		 703 -1; })
704
8f48bcd4
TG		 705#define RTA_GET_U8(rta) \
706({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u8)) \
707 goto rtattr_failure; \
708 *(u8 *) RTA_DATA(rta); })
709
710#define RTA_GET_U16(rta) \
711({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u16)) \
712 goto rtattr_failure; \
713 *(u16 *) RTA_DATA(rta); })
714
00768244
TG		 715#define RTA_GET_U32(rta) \
716({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u32)) \
717 goto rtattr_failure; \
718 *(u32 *) RTA_DATA(rta); })
719
720#define RTA_GET_U64(rta) \
721({ u64 _tmp; \
722 if (!rta || RTA_PAYLOAD(rta) < sizeof(u64)) \
723 goto rtattr_failure; \
724 memcpy(&_tmp, RTA_DATA(rta), sizeof(_tmp)); \
725 _tmp; })
726
8f48bcd4
TG		 727#define RTA_GET_FLAG(rta) (!!(rta))
728
00768244
TG		 729#define RTA_GET_SECS(rta) ((unsigned long) RTA_GET_U64(rta) * HZ)
730#define RTA_GET_MSECS(rta) (msecs_to_jiffies((unsigned long) RTA_GET_U64(rta)))
1da177e4
LT		 731
732static inline struct rtattr *
733__rta_reserve(struct sk_buff *skb, int attrtype, int attrlen)
734{
735 struct rtattr *rta;
736 int size = RTA_LENGTH(attrlen);
737
738 rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size));
739 rta->rta_type = attrtype;
740 rta->rta_len = size;
b3563c4f 741 memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
1da177e4
LT		 742 return rta;
743}
744
745#define __RTA_PUT(skb, attrtype, attrlen) \
746({ if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
747 goto rtattr_failure; \
748 __rta_reserve(skb, attrtype, attrlen); })
749
750extern void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change);
751
6756ae4b 752/* RTNL is used as a global lock for all changes to network configuration */
1da177e4 753extern void rtnl_lock(void);
1da177e4 754extern void rtnl_unlock(void);
6756ae4b 755extern int rtnl_trylock(void);
c9c1014b 756extern int rtnl_is_locked(void);
6756ae4b 757
1da177e4 758extern void rtnetlink_init(void);
6756ae4b 759extern void __rtnl_unlock(void);
1da177e4
LT		 760
761#define ASSERT_RTNL() do { \
c9c1014b 762 if (unlikely(!rtnl_is_locked())) { \
1da177e4
LT		 763 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \
764 __FILE__, __LINE__); \
765 dump_stack(); \
766 } \
767} while(0)
768
9e762a4a
PM		 769static inline u32 rtm_get_table(struct rtattr **rta, u8 table)
770{
771 return RTA_GET_U32(rta[RTA_TABLE-1]);
772rtattr_failure:
773 return table;
774}
775
1da177e4
LT		 776#endif /* __KERNEL__ */
777
778
779#endif /* __LINUX_RTNETLINK_H */
Linux 6.x block layer and io_uring tree(s)