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udp_tunnel: Pass UDP socket down through udp_tunnel{, 6}_xmit_skb().

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That was we can make sure the output path of ipv4/ipv6 operate on
the UDP socket rather than whatever random thing happens to be in
skb->sk.

Based upon a patch by Jiri Pirko.

Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
This commit is contained in:
David Miller 2015-04-05 22:19:09 -04:00 committed by David S. Miller
parent 7026b1ddb6
commit 79b16aadea
14 changed files with 48 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/net/vxlan.c
View File

@ -1672,7 +1672,8 @@ static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, u32 vxflags,
}
#if IS_ENABLED(CONFIG_IPV6)
static int vxlan6_xmit_skb(struct dst_entry *dst, struct sk_buff *skb,
static int vxlan6_xmit_skb(struct dst_entry *dst, struct sock *sk,
struct sk_buff *skb,
struct net_device *dev, struct in6_addr *saddr,
struct in6_addr *daddr, __u8 prio, __u8 ttl,
__be16 src_port, __be16 dst_port,
@ -1748,7 +1749,7 @@ static int vxlan6_xmit_skb(struct dst_entry *dst, struct sk_buff *skb,
skb_set_inner_protocol(skb, htons(ETH_P_TEB));
udp_tunnel6_xmit_skb(dst, skb, dev, saddr, daddr, prio,
udp_tunnel6_xmit_skb(dst, sk, skb, dev, saddr, daddr, prio,
ttl, src_port, dst_port,
!!(vxflags & VXLAN_F_UDP_ZERO_CSUM6_TX));
return 0;
@ -1758,7 +1759,7 @@ err:
}
#endif
int vxlan_xmit_skb(struct rtable *rt, struct sk_buff *skb,
int vxlan_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb,
__be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df,
__be16 src_port, __be16 dst_port,
struct vxlan_metadata *md, bool xnet, u32 vxflags)
@ -1827,7 +1828,7 @@ int vxlan_xmit_skb(struct rtable *rt, struct sk_buff *skb,
skb_set_inner_protocol(skb, htons(ETH_P_TEB));
return udp_tunnel_xmit_skb(rt, skb, src, dst, tos,
return udp_tunnel_xmit_skb(rt, sk, skb, src, dst, tos,
ttl, df, src_port, dst_port, xnet,
!(vxflags & VXLAN_F_UDP_CSUM));
}
@ -1882,6 +1883,7 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
struct vxlan_rdst *rdst, bool did_rsc)
{
struct vxlan_dev *vxlan = netdev_priv(dev);
struct sock *sk = vxlan->vn_sock->sock->sk;
struct rtable *rt = NULL;
const struct iphdr *old_iph;
struct flowi4 fl4;
@ -1961,7 +1963,7 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
md.vni = htonl(vni << 8);
md.gbp = skb->mark;
err = vxlan_xmit_skb(rt, skb, fl4.saddr,
err = vxlan_xmit_skb(rt, sk, skb, fl4.saddr,
dst->sin.sin_addr.s_addr, tos, ttl, df,
src_port, dst_port, &md,
!net_eq(vxlan->net, dev_net(vxlan->dev)),
@ -2021,7 +2023,7 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
md.vni = htonl(vni << 8);
md.gbp = skb->mark;
err = vxlan6_xmit_skb(ndst, skb, dev, &fl6.saddr, &fl6.daddr,
err = vxlan6_xmit_skb(ndst, sk, skb, dev, &fl6.saddr, &fl6.daddr,
0, ttl, src_port, dst_port, &md,
!net_eq(vxlan->net, dev_net(vxlan->dev)),
vxlan->flags);

5
include/net/ip6_tunnel.h
View File

@ -73,13 +73,14 @@ __u32 ip6_tnl_get_cap(struct ip6_tnl *t, const struct in6_addr *laddr,
struct net *ip6_tnl_get_link_net(const struct net_device *dev);
int ip6_tnl_get_iflink(const struct net_device *dev);
static inline void ip6tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
static inline void ip6tunnel_xmit(struct sock *sk, struct sk_buff *skb,
struct net_device *dev)
{
struct net_device_stats *stats = &dev->stats;
int pkt_len, err;
pkt_len = skb->len;
err = ip6_local_out(skb);
err = ip6_local_out_sk(sk, skb);
if (net_xmit_eval(err) == 0) {
struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);

1
include/net/ipv6.h
View File

@ -827,6 +827,7 @@ int ip6_input(struct sk_buff *skb);
int ip6_mc_input(struct sk_buff *skb);
int __ip6_local_out(struct sk_buff *skb);
int ip6_local_out_sk(struct sock *sk, struct sk_buff *skb);
int ip6_local_out(struct sk_buff *skb);
/*

5
include/net/udp_tunnel.h
View File

@ -77,13 +77,14 @@ void setup_udp_tunnel_sock(struct net *net, struct socket *sock,
struct udp_tunnel_sock_cfg *sock_cfg);
/* Transmit the skb using UDP encapsulation. */
int udp_tunnel_xmit_skb(struct rtable *rt, struct sk_buff *skb,
int udp_tunnel_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb,
__be32 src, __be32 dst, __u8 tos, __u8 ttl,
__be16 df, __be16 src_port, __be16 dst_port,
bool xnet, bool nocheck);
#if IS_ENABLED(CONFIG_IPV6)
int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sk_buff *skb,
int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk,
struct sk_buff *skb,
struct net_device *dev, struct in6_addr *saddr,
struct in6_addr *daddr,
__u8 prio, __u8 ttl, __be16 src_port,

2
include/net/vxlan.h
View File

@ -145,7 +145,7 @@ struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port,
void vxlan_sock_release(struct vxlan_sock *vs);
int vxlan_xmit_skb(struct rtable *rt, struct sk_buff *skb,
int vxlan_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb,
__be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df,
__be16 src_port, __be16 dst_port, struct vxlan_metadata *md,
bool xnet, u32 vxflags);

2
net/ipv4/geneve.c
View File

@ -136,7 +136,7 @@ int geneve_xmit_skb(struct geneve_sock *gs, struct rtable *rt,
skb_set_inner_protocol(skb, htons(ETH_P_TEB));
return udp_tunnel_xmit_skb(rt, skb, src, dst,
return udp_tunnel_xmit_skb(rt, gs->sock->sk, skb, src, dst,
tos, ttl, df, src_port, dst_port, xnet,
!csum);
}

2
net/ipv4/ip_tunnel.c
View File

@ -782,7 +782,7 @@ void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev,
return;
}
err = iptunnel_xmit(skb->sk, rt, skb, fl4.saddr, fl4.daddr, protocol,
err = iptunnel_xmit(NULL, rt, skb, fl4.saddr, fl4.daddr, protocol,
tos, ttl, df, !net_eq(tunnel->net, dev_net(dev)));
iptunnel_xmit_stats(err, &dev->stats, dev->tstats);

4
net/ipv4/udp_tunnel.c
View File

@ -75,7 +75,7 @@ void setup_udp_tunnel_sock(struct net *net, struct socket *sock,
}
EXPORT_SYMBOL_GPL(setup_udp_tunnel_sock);
int udp_tunnel_xmit_skb(struct rtable *rt, struct sk_buff *skb,
int udp_tunnel_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb,
__be32 src, __be32 dst, __u8 tos, __u8 ttl,
__be16 df, __be16 src_port, __be16 dst_port,
bool xnet, bool nocheck)
@ -92,7 +92,7 @@ int udp_tunnel_xmit_skb(struct rtable *rt, struct sk_buff *skb,
udp_set_csum(nocheck, skb, src, dst, skb->len);
return iptunnel_xmit(skb->sk, rt, skb, src, dst, IPPROTO_UDP,
return iptunnel_xmit(sk, rt, skb, src, dst, IPPROTO_UDP,
tos, ttl, df, xnet);
}
EXPORT_SYMBOL_GPL(udp_tunnel_xmit_skb);

2
net/ipv6/ip6_gre.c
View File

@ -760,7 +760,7 @@ static netdev_tx_t ip6gre_xmit2(struct sk_buff *skb,
skb_set_inner_protocol(skb, protocol);
ip6tunnel_xmit(skb, dev);
ip6tunnel_xmit(NULL, skb, dev);
if (ndst)
ip6_tnl_dst_store(tunnel, ndst);
return 0;

2
net/ipv6/ip6_tunnel.c
View File

@ -1100,7 +1100,7 @@ static int ip6_tnl_xmit2(struct sk_buff *skb,
ipv6h->nexthdr = proto;
ipv6h->saddr = fl6->saddr;
ipv6h->daddr = fl6->daddr;
ip6tunnel_xmit(skb, dev);
ip6tunnel_xmit(NULL, skb, dev);
if (ndst)
ip6_tnl_dst_store(t, ndst);
return 0;

5
net/ipv6/ip6_udp_tunnel.c
View File

@ -62,7 +62,8 @@ error:
}
EXPORT_SYMBOL_GPL(udp_sock_create6);
int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sk_buff *skb,
int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk,
struct sk_buff *skb,
struct net_device *dev, struct in6_addr *saddr,
struct in6_addr *daddr,
__u8 prio, __u8 ttl, __be16 src_port,
@ -97,7 +98,7 @@ int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sk_buff *skb,
ip6h->daddr = *daddr;
ip6h->saddr = *saddr;
ip6tunnel_xmit(skb, dev);
ip6tunnel_xmit(sk, skb, dev);
return 0;
}
EXPORT_SYMBOL_GPL(udp_tunnel6_xmit_skb);

21
net/ipv6/output_core.c
View File

@ -136,7 +136,7 @@ int ip6_dst_hoplimit(struct dst_entry *dst)
EXPORT_SYMBOL(ip6_dst_hoplimit);
#endif
int __ip6_local_out(struct sk_buff *skb)
static int __ip6_local_out_sk(struct sock *sk, struct sk_buff *skb)
{
int len;
@ -146,19 +146,30 @@ int __ip6_local_out(struct sk_buff *skb)
ipv6_hdr(skb)->payload_len = htons(len);
IP6CB(skb)->nhoff = offsetof(struct ipv6hdr, nexthdr);
return nf_hook(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb->sk, skb,
return nf_hook(NFPROTO_IPV6, NF_INET_LOCAL_OUT, sk, skb,
NULL, skb_dst(skb)->dev, dst_output_sk);
}
int __ip6_local_out(struct sk_buff *skb)
{
return __ip6_local_out_sk(skb->sk, skb);
}
EXPORT_SYMBOL_GPL(__ip6_local_out);
int ip6_local_out(struct sk_buff *skb)
int ip6_local_out_sk(struct sock *sk, struct sk_buff *skb)
{
int err;
err = __ip6_local_out(skb);
err = __ip6_local_out_sk(sk, skb);
if (likely(err == 1))
err = dst_output(skb);
err = dst_output_sk(sk, skb);
return err;
}
EXPORT_SYMBOL_GPL(ip6_local_out_sk);
int ip6_local_out(struct sk_buff *skb)
{
return ip6_local_out_sk(skb->sk, skb);
}
EXPORT_SYMBOL_GPL(ip6_local_out);

5
net/openvswitch/vport-vxlan.c
View File

@ -222,7 +222,8 @@ static int vxlan_tnl_send(struct vport *vport, struct sk_buff *skb)
{
struct net *net = ovs_dp_get_net(vport->dp);
struct vxlan_port *vxlan_port = vxlan_vport(vport);
__be16 dst_port = inet_sk(vxlan_port->vs->sock->sk)->inet_sport;
struct sock *sk = vxlan_port->vs->sock->sk;
__be16 dst_port = inet_sk(sk)->inet_sport;
const struct ovs_key_ipv4_tunnel *tun_key;
struct vxlan_metadata md = {0};
struct rtable *rt;
@ -255,7 +256,7 @@ static int vxlan_tnl_send(struct vport *vport, struct sk_buff *skb)
vxflags = vxlan_port->exts |
(tun_key->tun_flags & TUNNEL_CSUM ? VXLAN_F_UDP_CSUM : 0);
err = vxlan_xmit_skb(rt, skb, fl.saddr, tun_key->ipv4_dst,
err = vxlan_xmit_skb(rt, sk, skb, fl.saddr, tun_key->ipv4_dst,
tun_key->ipv4_tos, tun_key->ipv4_ttl, df,
src_port, dst_port,
&md, false, vxflags);

6
net/tipc/udp_media.c
View File

@ -176,7 +176,8 @@ static int tipc_udp_send_msg(struct net *net, struct sk_buff *skb,
goto tx_error;
}
ttl = ip4_dst_hoplimit(&rt->dst);
err = udp_tunnel_xmit_skb(rt, clone, src->ipv4.s_addr,
err = udp_tunnel_xmit_skb(rt, ub->ubsock->sk, clone,
src->ipv4.s_addr,
dst->ipv4.s_addr, 0, ttl, 0,
src->udp_port, dst->udp_port,
false, true);
@ -197,7 +198,8 @@ static int tipc_udp_send_msg(struct net *net, struct sk_buff *skb,
if (err)
goto tx_error;
ttl = ip6_dst_hoplimit(ndst);
err = udp_tunnel6_xmit_skb(ndst, clone, ndst->dev, &src->ipv6,
err = udp_tunnel6_xmit_skb(ndst, ub->ubsock->sk, clone,
ndst->dev, &src->ipv6,
&dst->ipv6, 0, ttl, src->udp_port,
dst->udp_port, false);
#endif