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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
Download Patch File Download Diff File Expand all files Collapse all files

14
net/ipv4/udp.c
View File

@@ -514,7 +514,7 @@ begin:
struct sock *sk2;
hash = udp_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;
@@ -553,7 +553,7 @@ found:
*/
struct sock *__udp4_lib_lookup(struct net *net, __be32 saddr,
__be16 sport, __be32 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;
@@ -602,7 +602,8 @@ begin:
struct sock *sk2;
hash = udp_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;
@@ -647,14 +648,14 @@ static inline struct sock *__udp4_lib_lookup_skb(struct sk_buff *skb,
return __udp4_lib_lookup(dev_net(skb_dst(skb)->dev), iph->saddr, sport,
iph->daddr, dport, inet_iif(skb),
udptable);
udptable, skb);
}
struct sock *udp4_lib_lookup(struct net *net, __be32 saddr, __be16 sport,
__be32 daddr, __be16 dport, int dif)
{
return __udp4_lib_lookup(net, saddr, sport, daddr, dport, dif,
&udp_table);
&udp_table, NULL);
}
EXPORT_SYMBOL_GPL(udp4_lib_lookup);
@@ -702,7 +703,8 @@ void __udp4_lib_err(struct sk_buff *skb, u32 info, struct udp_table *udptable)
struct net *net = dev_net(skb->dev);
sk = __udp4_lib_lookup(net, iph->daddr, uh->dest,
iph->saddr, uh->source, skb->dev->ifindex, udptable);
iph->saddr, uh->source, skb->dev->ifindex, udptable,
NULL);
if (!sk) {
ICMP_INC_STATS_BH(net, ICMP_MIB_INERRORS);
return; /* No socket for error */

4
net/ipv4/udp_diag.c
View File

@@ -44,7 +44,7 @@ static int udp_dump_one(struct udp_table *tbl, struct sk_buff *in_skb,
sk = __udp4_lib_lookup(net,
req->id.idiag_src[0], req->id.idiag_sport,
req->id.idiag_dst[0], req->id.idiag_dport,
req->id.idiag_if, tbl);
req->id.idiag_if, tbl, NULL);
#if IS_ENABLED(CONFIG_IPV6)
else if (req->sdiag_family == AF_INET6)
sk = __udp6_lib_lookup(net,
@@ -52,7 +52,7 @@ static int udp_dump_one(struct udp_table *tbl, struct sk_buff *in_skb,
req->id.idiag_sport,
(struct in6_addr *)req->id.idiag_dst,
req->id.idiag_dport,
req->id.idiag_if, tbl);
req->id.idiag_if, tbl, NULL);
#endif
else
goto out_nosk;