blob: 6c469dbdb9176d278a7815ad0aaf82acdfbc78e5 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 *
3 * Generic internet FLOW.
4 *
5 */
6
7#ifndef _NET_FLOW_H
8#define _NET_FLOW_H
9
dpwardaa1c3662011-09-05 16:47:24 +000010#include <linux/socket.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070011#include <linux/in6.h>
Arun Sharma600634972011-07-26 16:09:06 -070012#include <linux/atomic.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070013
David S. Miller806566c2011-03-11 18:22:00 -050014struct flowi_common {
15 int flowic_oif;
16 int flowic_iif;
17 __u32 flowic_mark;
18 __u8 flowic_tos;
19 __u8 flowic_scope;
20 __u8 flowic_proto;
21 __u8 flowic_flags;
David S. Millerfbef0a42011-03-11 15:55:37 -050022#define FLOWI_FLAG_ANYSRC 0x01
23#define FLOWI_FLAG_PRECOW_METRICS 0x02
24#define FLOWI_FLAG_CAN_SLEEP 0x04
David S. Miller806566c2011-03-11 18:22:00 -050025 __u32 flowic_secid;
26};
27
David S. Miller08704bc2011-03-11 18:36:42 -050028union flowi_uli {
29 struct {
David S. Miller08704bc2011-03-11 18:36:42 -050030 __be16 dport;
David S. Miller9b12c752011-03-31 18:03:35 -070031 __be16 sport;
David S. Miller08704bc2011-03-11 18:36:42 -050032 } ports;
33
34 struct {
35 __u8 type;
36 __u8 code;
37 } icmpt;
38
39 struct {
David S. Miller08704bc2011-03-11 18:36:42 -050040 __le16 dport;
David S. Miller9b12c752011-03-31 18:03:35 -070041 __le16 sport;
David S. Miller08704bc2011-03-11 18:36:42 -050042 } dnports;
43
44 __be32 spi;
45 __be32 gre_key;
46
47 struct {
48 __u8 type;
49 } mht;
50};
51
David S. Miller56bb8052011-03-12 00:44:35 -050052struct flowi4 {
David S. Miller806566c2011-03-11 18:22:00 -050053 struct flowi_common __fl_common;
David S. Miller22bd5b92011-03-11 19:54:08 -050054#define flowi4_oif __fl_common.flowic_oif
55#define flowi4_iif __fl_common.flowic_iif
56#define flowi4_mark __fl_common.flowic_mark
57#define flowi4_tos __fl_common.flowic_tos
58#define flowi4_scope __fl_common.flowic_scope
59#define flowi4_proto __fl_common.flowic_proto
60#define flowi4_flags __fl_common.flowic_flags
61#define flowi4_secid __fl_common.flowic_secid
Eric Dumazet84f93072011-11-30 19:00:53 +000062
63 /* (saddr,daddr) must be grouped, same order as in IP header */
David S. Miller56bb8052011-03-12 00:44:35 -050064 __be32 saddr;
Eric Dumazet84f93072011-11-30 19:00:53 +000065 __be32 daddr;
66
David S. Miller56bb8052011-03-12 00:44:35 -050067 union flowi_uli uli;
David S. Miller9cce96d2011-03-12 03:00:33 -050068#define fl4_sport uli.ports.sport
69#define fl4_dport uli.ports.dport
70#define fl4_icmp_type uli.icmpt.type
71#define fl4_icmp_code uli.icmpt.code
72#define fl4_ipsec_spi uli.spi
73#define fl4_mh_type uli.mht.type
74#define fl4_gre_key uli.gre_key
David Ward728871b2011-09-05 16:47:23 +000075} __attribute__((__aligned__(BITS_PER_LONG/8)));
Linus Torvalds1da177e2005-04-16 15:20:36 -070076
David S. Miller83229aa2011-03-31 04:52:14 -070077static inline void flowi4_init_output(struct flowi4 *fl4, int oif,
78 __u32 mark, __u8 tos, __u8 scope,
79 __u8 proto, __u8 flags,
80 __be32 daddr, __be32 saddr,
Eric Dumazet747465e2012-01-16 19:27:39 +000081 __be16 dport, __be16 sport)
David S. Miller83229aa2011-03-31 04:52:14 -070082{
83 fl4->flowi4_oif = oif;
84 fl4->flowi4_iif = 0;
85 fl4->flowi4_mark = mark;
86 fl4->flowi4_tos = tos;
87 fl4->flowi4_scope = scope;
88 fl4->flowi4_proto = proto;
89 fl4->flowi4_flags = flags;
90 fl4->flowi4_secid = 0;
91 fl4->daddr = daddr;
92 fl4->saddr = saddr;
David S. Miller83229aa2011-03-31 04:52:14 -070093 fl4->fl4_dport = dport;
David S. Miller9b12c752011-03-31 18:03:35 -070094 fl4->fl4_sport = sport;
David S. Miller83229aa2011-03-31 04:52:14 -070095}
Julian Anastasove6b45242012-02-04 13:04:46 +000096
97/* Reset some input parameters after previous lookup */
98static inline void flowi4_update_output(struct flowi4 *fl4, int oif, __u8 tos,
99 __be32 daddr, __be32 saddr)
100{
101 fl4->flowi4_oif = oif;
102 fl4->flowi4_tos = tos;
103 fl4->daddr = daddr;
104 fl4->saddr = saddr;
105}
David S. Miller83229aa2011-03-31 04:52:14 -0700106
107
David S. Miller56bb8052011-03-12 00:44:35 -0500108struct flowi6 {
109 struct flowi_common __fl_common;
David S. Miller20326562011-03-12 02:30:50 -0500110#define flowi6_oif __fl_common.flowic_oif
111#define flowi6_iif __fl_common.flowic_iif
112#define flowi6_mark __fl_common.flowic_mark
113#define flowi6_tos __fl_common.flowic_tos
114#define flowi6_scope __fl_common.flowic_scope
115#define flowi6_proto __fl_common.flowic_proto
116#define flowi6_flags __fl_common.flowic_flags
117#define flowi6_secid __fl_common.flowic_secid
David S. Miller56bb8052011-03-12 00:44:35 -0500118 struct in6_addr daddr;
119 struct in6_addr saddr;
120 __be32 flowlabel;
121 union flowi_uli uli;
David S. Miller1958b852011-03-12 16:36:19 -0500122#define fl6_sport uli.ports.sport
123#define fl6_dport uli.ports.dport
124#define fl6_icmp_type uli.icmpt.type
125#define fl6_icmp_code uli.icmpt.code
126#define fl6_ipsec_spi uli.spi
127#define fl6_mh_type uli.mht.type
128#define fl6_gre_key uli.gre_key
David Ward728871b2011-09-05 16:47:23 +0000129} __attribute__((__aligned__(BITS_PER_LONG/8)));
David S. Miller56bb8052011-03-12 00:44:35 -0500130
131struct flowidn {
132 struct flowi_common __fl_common;
David S. Millerbef55ae2011-03-12 17:17:10 -0500133#define flowidn_oif __fl_common.flowic_oif
134#define flowidn_iif __fl_common.flowic_iif
135#define flowidn_mark __fl_common.flowic_mark
136#define flowidn_scope __fl_common.flowic_scope
137#define flowidn_proto __fl_common.flowic_proto
138#define flowidn_flags __fl_common.flowic_flags
David S. Miller56bb8052011-03-12 00:44:35 -0500139 __le16 daddr;
140 __le16 saddr;
141 union flowi_uli uli;
David S. Millerbef55ae2011-03-12 17:17:10 -0500142#define fld_sport uli.ports.sport
143#define fld_dport uli.ports.dport
David Ward728871b2011-09-05 16:47:23 +0000144} __attribute__((__aligned__(BITS_PER_LONG/8)));
David S. Miller56bb8052011-03-12 00:44:35 -0500145
146struct flowi {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147 union {
David S. Miller56bb8052011-03-12 00:44:35 -0500148 struct flowi_common __fl_common;
149 struct flowi4 ip4;
150 struct flowi6 ip6;
151 struct flowidn dn;
152 } u;
153#define flowi_oif u.__fl_common.flowic_oif
154#define flowi_iif u.__fl_common.flowic_iif
155#define flowi_mark u.__fl_common.flowic_mark
156#define flowi_tos u.__fl_common.flowic_tos
157#define flowi_scope u.__fl_common.flowic_scope
158#define flowi_proto u.__fl_common.flowic_proto
159#define flowi_flags u.__fl_common.flowic_flags
160#define flowi_secid u.__fl_common.flowic_secid
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161} __attribute__((__aligned__(BITS_PER_LONG/8)));
162
David S. Miller59b1a942011-03-11 19:23:02 -0500163static inline struct flowi *flowi4_to_flowi(struct flowi4 *fl4)
164{
165 return container_of(fl4, struct flowi, u.ip4);
166}
167
168static inline struct flowi *flowi6_to_flowi(struct flowi6 *fl6)
169{
170 return container_of(fl6, struct flowi, u.ip6);
171}
172
173static inline struct flowi *flowidn_to_flowi(struct flowidn *fldn)
174{
175 return container_of(fldn, struct flowi, u.dn);
176}
177
dpwardaa1c3662011-09-05 16:47:24 +0000178typedef unsigned long flow_compare_t;
179
180static inline size_t flow_key_size(u16 family)
181{
182 switch (family) {
183 case AF_INET:
184 BUILD_BUG_ON(sizeof(struct flowi4) % sizeof(flow_compare_t));
185 return sizeof(struct flowi4) / sizeof(flow_compare_t);
186 case AF_INET6:
187 BUILD_BUG_ON(sizeof(struct flowi6) % sizeof(flow_compare_t));
188 return sizeof(struct flowi6) / sizeof(flow_compare_t);
189 case AF_DECnet:
190 BUILD_BUG_ON(sizeof(struct flowidn) % sizeof(flow_compare_t));
191 return sizeof(struct flowidn) / sizeof(flow_compare_t);
192 }
193 return 0;
194}
195
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196#define FLOW_DIR_IN 0
197#define FLOW_DIR_OUT 1
198#define FLOW_DIR_FWD 2
199
Alexey Dobriyan52479b62008-11-25 17:35:18 -0800200struct net;
Trent Jaegerdf718372005-12-13 23:12:27 -0800201struct sock;
Timo Teräsfe1a5f02010-04-07 00:30:04 +0000202struct flow_cache_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203
Timo Teräsfe1a5f02010-04-07 00:30:04 +0000204struct flow_cache_object {
205 const struct flow_cache_ops *ops;
206};
207
208struct flow_cache_ops {
209 struct flow_cache_object *(*get)(struct flow_cache_object *);
210 int (*check)(struct flow_cache_object *);
211 void (*delete)(struct flow_cache_object *);
212};
213
214typedef struct flow_cache_object *(*flow_resolve_t)(
David S. Millerdee9f4b2011-02-22 18:44:31 -0800215 struct net *net, const struct flowi *key, u16 family,
Timo Teräsfe1a5f02010-04-07 00:30:04 +0000216 u8 dir, struct flow_cache_object *oldobj, void *ctx);
217
218extern struct flow_cache_object *flow_cache_lookup(
David S. Millerdee9f4b2011-02-22 18:44:31 -0800219 struct net *net, const struct flowi *key, u16 family,
Timo Teräsfe1a5f02010-04-07 00:30:04 +0000220 u8 dir, flow_resolve_t resolver, void *ctx);
221
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222extern void flow_cache_flush(void);
Steffen Klassertc0ed1c12011-12-21 16:48:08 -0500223extern void flow_cache_flush_deferred(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224extern atomic_t flow_cache_genid;
225
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226#endif