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-rw-r--r--include/net/route.h164
1 files changed, 118 insertions, 46 deletions
diff --git a/include/net/route.h b/include/net/route.h
index 93e10c453f6..30d6cae3841 100644
--- a/include/net/route.h
+++ b/include/net/route.h
@@ -49,36 +49,43 @@
struct fib_nh;
struct inet_peer;
+struct fib_info;
struct rtable {
struct dst_entry dst;
- /* Cache lookup keys */
- struct flowi fl;
+ /* Lookup key. */
+ __be32 rt_key_dst;
+ __be32 rt_key_src;
int rt_genid;
unsigned rt_flags;
__u16 rt_type;
+ __u8 rt_tos;
__be32 rt_dst; /* Path destination */
__be32 rt_src; /* Path source */
int rt_iif;
+ int rt_oif;
+ __u32 rt_mark;
/* Info on neighbour */
__be32 rt_gateway;
/* Miscellaneous cached information */
__be32 rt_spec_dst; /* RFC1122 specific destination */
+ u32 rt_peer_genid;
struct inet_peer *peer; /* long-living peer info */
+ struct fib_info *fi; /* for client ref to shared metrics */
};
static inline bool rt_is_input_route(struct rtable *rt)
{
- return rt->fl.iif != 0;
+ return rt->rt_iif != 0;
}
static inline bool rt_is_output_route(struct rtable *rt)
{
- return rt->fl.iif == 0;
+ return rt->rt_iif == 0;
}
struct ip_rt_acct {
@@ -115,9 +122,63 @@ extern void ip_rt_redirect(__be32 old_gw, __be32 dst, __be32 new_gw,
__be32 src, struct net_device *dev);
extern void rt_cache_flush(struct net *net, int how);
extern void rt_cache_flush_batch(struct net *net);
-extern int __ip_route_output_key(struct net *, struct rtable **, const struct flowi *flp);
-extern int ip_route_output_key(struct net *, struct rtable **, struct flowi *flp);
-extern int ip_route_output_flow(struct net *, struct rtable **rp, struct flowi *flp, struct sock *sk, int flags);
+extern struct rtable *__ip_route_output_key(struct net *, const struct flowi4 *flp);
+extern struct rtable *ip_route_output_flow(struct net *, struct flowi4 *flp,
+ struct sock *sk);
+extern struct dst_entry *ipv4_blackhole_route(struct net *net, struct dst_entry *dst_orig);
+
+static inline struct rtable *ip_route_output_key(struct net *net, struct flowi4 *flp)
+{
+ return ip_route_output_flow(net, flp, NULL);
+}
+
+static inline struct rtable *ip_route_output(struct net *net, __be32 daddr,
+ __be32 saddr, u8 tos, int oif)
+{
+ struct flowi4 fl4 = {
+ .flowi4_oif = oif,
+ .daddr = daddr,
+ .saddr = saddr,
+ .flowi4_tos = tos,
+ };
+ return ip_route_output_key(net, &fl4);
+}
+
+static inline struct rtable *ip_route_output_ports(struct net *net, struct sock *sk,
+ __be32 daddr, __be32 saddr,
+ __be16 dport, __be16 sport,
+ __u8 proto, __u8 tos, int oif)
+{
+ struct flowi4 fl4 = {
+ .flowi4_oif = oif,
+ .flowi4_flags = sk ? inet_sk_flowi_flags(sk) : 0,
+ .flowi4_mark = sk ? sk->sk_mark : 0,
+ .daddr = daddr,
+ .saddr = saddr,
+ .flowi4_tos = tos,
+ .flowi4_proto = proto,
+ .fl4_dport = dport,
+ .fl4_sport = sport,
+ };
+ if (sk)
+ security_sk_classify_flow(sk, flowi4_to_flowi(&fl4));
+ return ip_route_output_flow(net, &fl4, sk);
+}
+
+static inline struct rtable *ip_route_output_gre(struct net *net,
+ __be32 daddr, __be32 saddr,
+ __be32 gre_key, __u8 tos, int oif)
+{
+ struct flowi4 fl4 = {
+ .flowi4_oif = oif,
+ .daddr = daddr,
+ .saddr = saddr,
+ .flowi4_tos = tos,
+ .flowi4_proto = IPPROTO_GRE,
+ .fl4_gre_key = gre_key,
+ };
+ return ip_route_output_key(net, &fl4);
+}
extern int ip_route_input_common(struct sk_buff *skb, __be32 dst, __be32 src,
u8 tos, struct net_device *devin, bool noref);
@@ -162,57 +223,68 @@ static inline char rt_tos2priority(u8 tos)
return ip_tos2prio[IPTOS_TOS(tos)>>1];
}
-static inline int ip_route_connect(struct rtable **rp, __be32 dst,
- __be32 src, u32 tos, int oif, u8 protocol,
- __be16 sport, __be16 dport, struct sock *sk,
- int flags)
+static inline struct rtable *ip_route_connect(__be32 dst, __be32 src, u32 tos,
+ int oif, u8 protocol,
+ __be16 sport, __be16 dport,
+ struct sock *sk, bool can_sleep)
{
- struct flowi fl = { .oif = oif,
- .mark = sk->sk_mark,
- .fl4_dst = dst,
- .fl4_src = src,
- .fl4_tos = tos,
- .proto = protocol,
- .fl_ip_sport = sport,
- .fl_ip_dport = dport };
- int err;
+ struct flowi4 fl4 = {
+ .flowi4_oif = oif,
+ .flowi4_mark = sk->sk_mark,
+ .daddr = dst,
+ .saddr = src,
+ .flowi4_tos = tos,
+ .flowi4_proto = protocol,
+ .fl4_sport = sport,
+ .fl4_dport = dport,
+ };
struct net *net = sock_net(sk);
+ struct rtable *rt;
if (inet_sk(sk)->transparent)
- fl.flags |= FLOWI_FLAG_ANYSRC;
+ fl4.flowi4_flags |= FLOWI_FLAG_ANYSRC;
+ if (protocol == IPPROTO_TCP)
+ fl4.flowi4_flags |= FLOWI_FLAG_PRECOW_METRICS;
+ if (can_sleep)
+ fl4.flowi4_flags |= FLOWI_FLAG_CAN_SLEEP;
if (!dst || !src) {
- err = __ip_route_output_key(net, rp, &fl);
- if (err)
- return err;
- fl.fl4_dst = (*rp)->rt_dst;
- fl.fl4_src = (*rp)->rt_src;
- ip_rt_put(*rp);
- *rp = NULL;
+ rt = __ip_route_output_key(net, &fl4);
+ if (IS_ERR(rt))
+ return rt;
+ fl4.daddr = rt->rt_dst;
+ fl4.saddr = rt->rt_src;
+ ip_rt_put(rt);
}
- security_sk_classify_flow(sk, &fl);
- return ip_route_output_flow(net, rp, &fl, sk, flags);
+ security_sk_classify_flow(sk, flowi4_to_flowi(&fl4));
+ return ip_route_output_flow(net, &fl4, sk);
}
-static inline int ip_route_newports(struct rtable **rp, u8 protocol,
- __be16 sport, __be16 dport, struct sock *sk)
+static inline struct rtable *ip_route_newports(struct rtable *rt,
+ u8 protocol, __be16 orig_sport,
+ __be16 orig_dport, __be16 sport,
+ __be16 dport, struct sock *sk)
{
- if (sport != (*rp)->fl.fl_ip_sport ||
- dport != (*rp)->fl.fl_ip_dport) {
- struct flowi fl;
-
- memcpy(&fl, &(*rp)->fl, sizeof(fl));
- fl.fl_ip_sport = sport;
- fl.fl_ip_dport = dport;
- fl.proto = protocol;
+ if (sport != orig_sport || dport != orig_dport) {
+ struct flowi4 fl4 = {
+ .flowi4_oif = rt->rt_oif,
+ .flowi4_mark = rt->rt_mark,
+ .daddr = rt->rt_key_dst,
+ .saddr = rt->rt_key_src,
+ .flowi4_tos = rt->rt_tos,
+ .flowi4_proto = protocol,
+ .fl4_sport = sport,
+ .fl4_dport = dport
+ };
if (inet_sk(sk)->transparent)
- fl.flags |= FLOWI_FLAG_ANYSRC;
- ip_rt_put(*rp);
- *rp = NULL;
- security_sk_classify_flow(sk, &fl);
- return ip_route_output_flow(sock_net(sk), rp, &fl, sk, 0);
+ fl4.flowi4_flags |= FLOWI_FLAG_ANYSRC;
+ if (protocol == IPPROTO_TCP)
+ fl4.flowi4_flags |= FLOWI_FLAG_PRECOW_METRICS;
+ ip_rt_put(rt);
+ security_sk_classify_flow(sk, flowi4_to_flowi(&fl4));
+ return ip_route_output_flow(sock_net(sk), &fl4, sk);
}
- return 0;
+ return rt;
}
extern void rt_bind_peer(struct rtable *rt, int create);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-08 04:11:01 +0000