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authorLinus Torvalds <torvalds@linux-foundation.org>2011-05-20 16:43:21 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2011-05-20 16:43:21 -0400
commit06f4e926d256d902dd9a53dcb400fd74974ce087 (patch)
tree0b438b67f5f0eff6fd617bc497a9dace6164a488 /include/net/route.h
parent8e7bfcbab3825d1b404d615cb1b54f44ff81f981 (diff)
parentd93515611bbc70c2fe4db232e5feb448ed8e4cc9 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6: (1446 commits) macvlan: fix panic if lowerdev in a bond tg3: Add braces around 5906 workaround. tg3: Fix NETIF_F_LOOPBACK error macvlan: remove one synchronize_rcu() call networking: NET_CLS_ROUTE4 depends on INET irda: Fix error propagation in ircomm_lmp_connect_response() irda: Kill set but unused variable 'bytes' in irlan_check_command_param() irda: Kill set but unused variable 'clen' in ircomm_connect_indication() rxrpc: Fix set but unused variable 'usage' in rxrpc_get_transport() be2net: Kill set but unused variable 'req' in lancer_fw_download() irda: Kill set but unused vars 'saddr' and 'daddr' in irlan_provider_connect_indication() atl1c: atl1c_resume() is only used when CONFIG_PM_SLEEP is defined. rxrpc: Fix set but unused variable 'usage' in rxrpc_get_peer(). rxrpc: Kill set but unused variable 'local' in rxrpc_UDP_error_handler() rxrpc: Kill set but unused variable 'sp' in rxrpc_process_connection() rxrpc: Kill set but unused variable 'sp' in rxrpc_rotate_tx_window() pkt_sched: Kill set but unused variable 'protocol' in tc_classify() isdn: capi: Use pr_debug() instead of ifdefs. tg3: Update version to 3.119 tg3: Apply rx_discards fix to 5719/5720 ... Fix up trivial conflicts in arch/x86/Kconfig and net/mac80211/agg-tx.c as per Davem.
Diffstat (limited to 'include/net/route.h')
-rw-r--r--include/net/route.h163
1 files changed, 82 insertions, 81 deletions
diff --git a/include/net/route.h b/include/net/route.h
index 8fce0621cad1..db7b3432f07c 100644
--- a/include/net/route.h
+++ b/include/net/route.h
@@ -35,16 +35,8 @@
35#include <linux/cache.h> 35#include <linux/cache.h>
36#include <linux/security.h> 36#include <linux/security.h>
37 37
38#ifndef __KERNEL__
39#warning This file is not supposed to be used outside of kernel.
40#endif
41
42#define RTO_ONLINK 0x01 38#define RTO_ONLINK 0x01
43 39
44#define RTO_CONN 0
45/* RTO_CONN is not used (being alias for 0), but preserved not to break
46 * some modules referring to it. */
47
48#define RT_CONN_FLAGS(sk) (RT_TOS(inet_sk(sk)->tos) | sock_flag(sk, SOCK_LOCALROUTE)) 40#define RT_CONN_FLAGS(sk) (RT_TOS(inet_sk(sk)->tos) | sock_flag(sk, SOCK_LOCALROUTE))
49 41
50struct fib_nh; 42struct fib_nh;
@@ -60,7 +52,7 @@ struct rtable {
60 int rt_genid; 52 int rt_genid;
61 unsigned rt_flags; 53 unsigned rt_flags;
62 __u16 rt_type; 54 __u16 rt_type;
63 __u8 rt_tos; 55 __u8 rt_key_tos;
64 56
65 __be32 rt_dst; /* Path destination */ 57 __be32 rt_dst; /* Path destination */
66 __be32 rt_src; /* Path source */ 58 __be32 rt_src; /* Path source */
@@ -123,7 +115,7 @@ extern void ip_rt_redirect(__be32 old_gw, __be32 dst, __be32 new_gw,
123 __be32 src, struct net_device *dev); 115 __be32 src, struct net_device *dev);
124extern void rt_cache_flush(struct net *net, int how); 116extern void rt_cache_flush(struct net *net, int how);
125extern void rt_cache_flush_batch(struct net *net); 117extern void rt_cache_flush_batch(struct net *net);
126extern struct rtable *__ip_route_output_key(struct net *, const struct flowi4 *flp); 118extern struct rtable *__ip_route_output_key(struct net *, struct flowi4 *flp);
127extern struct rtable *ip_route_output_flow(struct net *, struct flowi4 *flp, 119extern struct rtable *ip_route_output_flow(struct net *, struct flowi4 *flp,
128 struct sock *sk); 120 struct sock *sk);
129extern struct dst_entry *ipv4_blackhole_route(struct net *net, struct dst_entry *dst_orig); 121extern struct dst_entry *ipv4_blackhole_route(struct net *net, struct dst_entry *dst_orig);
@@ -145,40 +137,33 @@ static inline struct rtable *ip_route_output(struct net *net, __be32 daddr,
145 return ip_route_output_key(net, &fl4); 137 return ip_route_output_key(net, &fl4);
146} 138}
147 139
148static inline struct rtable *ip_route_output_ports(struct net *net, struct sock *sk, 140static inline struct rtable *ip_route_output_ports(struct net *net, struct flowi4 *fl4,
141 struct sock *sk,
149 __be32 daddr, __be32 saddr, 142 __be32 daddr, __be32 saddr,
150 __be16 dport, __be16 sport, 143 __be16 dport, __be16 sport,
151 __u8 proto, __u8 tos, int oif) 144 __u8 proto, __u8 tos, int oif)
152{ 145{
153 struct flowi4 fl4 = { 146 flowi4_init_output(fl4, oif, sk ? sk->sk_mark : 0, tos,
154 .flowi4_oif = oif, 147 RT_SCOPE_UNIVERSE, proto,
155 .flowi4_flags = sk ? inet_sk_flowi_flags(sk) : 0, 148 sk ? inet_sk_flowi_flags(sk) : 0,
156 .flowi4_mark = sk ? sk->sk_mark : 0, 149 daddr, saddr, dport, sport);
157 .daddr = daddr,
158 .saddr = saddr,
159 .flowi4_tos = tos,
160 .flowi4_proto = proto,
161 .fl4_dport = dport,
162 .fl4_sport = sport,
163 };
164 if (sk) 150 if (sk)
165 security_sk_classify_flow(sk, flowi4_to_flowi(&fl4)); 151 security_sk_classify_flow(sk, flowi4_to_flowi(fl4));
166 return ip_route_output_flow(net, &fl4, sk); 152 return ip_route_output_flow(net, fl4, sk);
167} 153}
168 154
169static inline struct rtable *ip_route_output_gre(struct net *net, 155static inline struct rtable *ip_route_output_gre(struct net *net, struct flowi4 *fl4,
170 __be32 daddr, __be32 saddr, 156 __be32 daddr, __be32 saddr,
171 __be32 gre_key, __u8 tos, int oif) 157 __be32 gre_key, __u8 tos, int oif)
172{ 158{
173 struct flowi4 fl4 = { 159 memset(fl4, 0, sizeof(*fl4));
174 .flowi4_oif = oif, 160 fl4->flowi4_oif = oif;
175 .daddr = daddr, 161 fl4->daddr = daddr;
176 .saddr = saddr, 162 fl4->saddr = saddr;
177 .flowi4_tos = tos, 163 fl4->flowi4_tos = tos;
178 .flowi4_proto = IPPROTO_GRE, 164 fl4->flowi4_proto = IPPROTO_GRE;
179 .fl4_gre_key = gre_key, 165 fl4->fl4_gre_key = gre_key;
180 }; 166 return ip_route_output_key(net, fl4);
181 return ip_route_output_key(net, &fl4);
182} 167}
183 168
184extern int ip_route_input_common(struct sk_buff *skb, __be32 dst, __be32 src, 169extern int ip_route_input_common(struct sk_buff *skb, __be32 dst, __be32 src,
@@ -196,14 +181,15 @@ static inline int ip_route_input_noref(struct sk_buff *skb, __be32 dst, __be32 s
196 return ip_route_input_common(skb, dst, src, tos, devin, true); 181 return ip_route_input_common(skb, dst, src, tos, devin, true);
197} 182}
198 183
199extern unsigned short ip_rt_frag_needed(struct net *net, struct iphdr *iph, unsigned short new_mtu, struct net_device *dev); 184extern unsigned short ip_rt_frag_needed(struct net *net, const struct iphdr *iph,
185 unsigned short new_mtu, struct net_device *dev);
200extern void ip_rt_send_redirect(struct sk_buff *skb); 186extern void ip_rt_send_redirect(struct sk_buff *skb);
201 187
202extern unsigned inet_addr_type(struct net *net, __be32 addr); 188extern unsigned inet_addr_type(struct net *net, __be32 addr);
203extern unsigned inet_dev_addr_type(struct net *net, const struct net_device *dev, __be32 addr); 189extern unsigned inet_dev_addr_type(struct net *net, const struct net_device *dev, __be32 addr);
204extern void ip_rt_multicast_event(struct in_device *); 190extern void ip_rt_multicast_event(struct in_device *);
205extern int ip_rt_ioctl(struct net *, unsigned int cmd, void __user *arg); 191extern int ip_rt_ioctl(struct net *, unsigned int cmd, void __user *arg);
206extern void ip_rt_get_source(u8 *src, struct rtable *rt); 192extern void ip_rt_get_source(u8 *src, struct sk_buff *skb, struct rtable *rt);
207extern int ip_rt_dump(struct sk_buff *skb, struct netlink_callback *cb); 193extern int ip_rt_dump(struct sk_buff *skb, struct netlink_callback *cb);
208 194
209struct in_ifaddr; 195struct in_ifaddr;
@@ -225,78 +211,93 @@ static inline char rt_tos2priority(u8 tos)
225 return ip_tos2prio[IPTOS_TOS(tos)>>1]; 211 return ip_tos2prio[IPTOS_TOS(tos)>>1];
226} 212}
227 213
228static inline struct rtable *ip_route_connect(__be32 dst, __be32 src, u32 tos, 214/* ip_route_connect() and ip_route_newports() work in tandem whilst
215 * binding a socket for a new outgoing connection.
216 *
217 * In order to use IPSEC properly, we must, in the end, have a
218 * route that was looked up using all available keys including source
219 * and destination ports.
220 *
221 * However, if a source port needs to be allocated (the user specified
222 * a wildcard source port) we need to obtain addressing information
223 * in order to perform that allocation.
224 *
225 * So ip_route_connect() looks up a route using wildcarded source and
226 * destination ports in the key, simply so that we can get a pair of
227 * addresses to use for port allocation.
228 *
229 * Later, once the ports are allocated, ip_route_newports() will make
230 * another route lookup if needed to make sure we catch any IPSEC
231 * rules keyed on the port information.
232 *
233 * The callers allocate the flow key on their stack, and must pass in
234 * the same flowi4 object to both the ip_route_connect() and the
235 * ip_route_newports() calls.
236 */
237
238static inline void ip_route_connect_init(struct flowi4 *fl4, __be32 dst, __be32 src,
239 u32 tos, int oif, u8 protocol,
240 __be16 sport, __be16 dport,
241 struct sock *sk, bool can_sleep)
242{
243 __u8 flow_flags = 0;
244
245 if (inet_sk(sk)->transparent)
246 flow_flags |= FLOWI_FLAG_ANYSRC;
247 if (protocol == IPPROTO_TCP)
248 flow_flags |= FLOWI_FLAG_PRECOW_METRICS;
249 if (can_sleep)
250 flow_flags |= FLOWI_FLAG_CAN_SLEEP;
251
252 flowi4_init_output(fl4, oif, sk->sk_mark, tos, RT_SCOPE_UNIVERSE,
253 protocol, flow_flags, dst, src, dport, sport);
254}
255
256static inline struct rtable *ip_route_connect(struct flowi4 *fl4,
257 __be32 dst, __be32 src, u32 tos,
229 int oif, u8 protocol, 258 int oif, u8 protocol,
230 __be16 sport, __be16 dport, 259 __be16 sport, __be16 dport,
231 struct sock *sk, bool can_sleep) 260 struct sock *sk, bool can_sleep)
232{ 261{
233 struct flowi4 fl4 = {
234 .flowi4_oif = oif,
235 .flowi4_mark = sk->sk_mark,
236 .daddr = dst,
237 .saddr = src,
238 .flowi4_tos = tos,
239 .flowi4_proto = protocol,
240 .fl4_sport = sport,
241 .fl4_dport = dport,
242 };
243 struct net *net = sock_net(sk); 262 struct net *net = sock_net(sk);
244 struct rtable *rt; 263 struct rtable *rt;
245 264
246 if (inet_sk(sk)->transparent) 265 ip_route_connect_init(fl4, dst, src, tos, oif, protocol,
247 fl4.flowi4_flags |= FLOWI_FLAG_ANYSRC; 266 sport, dport, sk, can_sleep);
248 if (protocol == IPPROTO_TCP)
249 fl4.flowi4_flags |= FLOWI_FLAG_PRECOW_METRICS;
250 if (can_sleep)
251 fl4.flowi4_flags |= FLOWI_FLAG_CAN_SLEEP;
252 267
253 if (!dst || !src) { 268 if (!dst || !src) {
254 rt = __ip_route_output_key(net, &fl4); 269 rt = __ip_route_output_key(net, fl4);
255 if (IS_ERR(rt)) 270 if (IS_ERR(rt))
256 return rt; 271 return rt;
257 fl4.daddr = rt->rt_dst;
258 fl4.saddr = rt->rt_src;
259 ip_rt_put(rt); 272 ip_rt_put(rt);
260 } 273 }
261 security_sk_classify_flow(sk, flowi4_to_flowi(&fl4)); 274 security_sk_classify_flow(sk, flowi4_to_flowi(fl4));
262 return ip_route_output_flow(net, &fl4, sk); 275 return ip_route_output_flow(net, fl4, sk);
263} 276}
264 277
265static inline struct rtable *ip_route_newports(struct rtable *rt, 278static inline struct rtable *ip_route_newports(struct flowi4 *fl4, struct rtable *rt,
266 u8 protocol, __be16 orig_sport, 279 __be16 orig_sport, __be16 orig_dport,
267 __be16 orig_dport, __be16 sport, 280 __be16 sport, __be16 dport,
268 __be16 dport, struct sock *sk) 281 struct sock *sk)
269{ 282{
270 if (sport != orig_sport || dport != orig_dport) { 283 if (sport != orig_sport || dport != orig_dport) {
271 struct flowi4 fl4 = { 284 fl4->fl4_dport = dport;
272 .flowi4_oif = rt->rt_oif, 285 fl4->fl4_sport = sport;
273 .flowi4_mark = rt->rt_mark,
274 .daddr = rt->rt_dst,
275 .saddr = rt->rt_src,
276 .flowi4_tos = rt->rt_tos,
277 .flowi4_proto = protocol,
278 .fl4_sport = sport,
279 .fl4_dport = dport
280 };
281 if (inet_sk(sk)->transparent)
282 fl4.flowi4_flags |= FLOWI_FLAG_ANYSRC;
283 if (protocol == IPPROTO_TCP)
284 fl4.flowi4_flags |= FLOWI_FLAG_PRECOW_METRICS;
285 ip_rt_put(rt); 286 ip_rt_put(rt);
286 security_sk_classify_flow(sk, flowi4_to_flowi(&fl4)); 287 security_sk_classify_flow(sk, flowi4_to_flowi(fl4));
287 return ip_route_output_flow(sock_net(sk), &fl4, sk); 288 return ip_route_output_flow(sock_net(sk), fl4, sk);
288 } 289 }
289 return rt; 290 return rt;
290} 291}
291 292
292extern void rt_bind_peer(struct rtable *rt, int create); 293extern void rt_bind_peer(struct rtable *rt, __be32 daddr, int create);
293 294
294static inline struct inet_peer *rt_get_peer(struct rtable *rt) 295static inline struct inet_peer *rt_get_peer(struct rtable *rt, __be32 daddr)
295{ 296{
296 if (rt->peer) 297 if (rt->peer)
297 return rt->peer; 298 return rt->peer;
298 299
299 rt_bind_peer(rt, 0); 300 rt_bind_peer(rt, daddr, 0);
300 return rt->peer; 301 return rt->peer;
301} 302}
302 303