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soreuseport: setsockopt SO_ATTACH_REUSEPORT_[CE]BPF

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Expose socket options for setting a classic or extended BPF program
for use when selecting sockets in an SO_REUSEPORT group.  These options
can be used on the first socket to belong to a group before bind or
on any socket in the group after bind.

This change includes refactoring of the existing sk_filter code to
allow reuse of the existing BPF filter validation checks.

Signed-off-by: Craig Gallek <kraig@google.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Craig Gallek
2016-01-04 17:41:47 -05:00
committed by David S. Miller
parent e32ea7e747
commit 538950a1b7
22 changed files with 300 additions and 62 deletions
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14
net/ipv6/udp.c
View File

@@ -272,7 +272,7 @@ begin:
struct sock *sk2;
hash = udp6_ehashfn(net, daddr, hnum,
saddr, sport);
sk2 = reuseport_select_sock(sk, hash);
sk2 = reuseport_select_sock(sk, hash, NULL, 0);
if (sk2) {
result = sk2;
goto found;
@@ -310,7 +310,8 @@ found:
struct sock *__udp6_lib_lookup(struct net *net,
const struct in6_addr *saddr, __be16 sport,
const struct in6_addr *daddr, __be16 dport,
int dif, struct udp_table *udptable)
int dif, struct udp_table *udptable,
struct sk_buff *skb)
{
struct sock *sk, *result;
struct hlist_nulls_node *node;
@@ -358,7 +359,8 @@ begin:
struct sock *sk2;
hash = udp6_ehashfn(net, daddr, hnum,
saddr, sport);
sk2 = reuseport_select_sock(sk, hash);
sk2 = reuseport_select_sock(sk, hash, skb,
sizeof(struct udphdr));
if (sk2) {
result = sk2;
goto found;
@@ -407,13 +409,13 @@ static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb,
return sk;
return __udp6_lib_lookup(dev_net(skb_dst(skb)->dev), &iph->saddr, sport,
&iph->daddr, dport, inet6_iif(skb),
udptable);
udptable, skb);
}
struct sock *udp6_lib_lookup(struct net *net, const struct in6_addr *saddr, __be16 sport,
const struct in6_addr *daddr, __be16 dport, int dif)
{
return __udp6_lib_lookup(net, saddr, sport, daddr, dport, dif, &udp_table);
return __udp6_lib_lookup(net, saddr, sport, daddr, dport, dif, &udp_table, NULL);
}
EXPORT_SYMBOL_GPL(udp6_lib_lookup);
@@ -580,7 +582,7 @@ void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
struct net *net = dev_net(skb->dev);
sk = __udp6_lib_lookup(net, daddr, uh->dest, saddr, uh->source,
inet6_iif(skb), udptable);
inet6_iif(skb), udptable, skb);
if (!sk) {
ICMP6_INC_STATS_BH(net, __in6_dev_get(skb->dev),
ICMP6_MIB_INERRORS);