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authorCraig Gallek <kraig@google.com>2016-01-04 17:41:47 -0500
committerDavid S. Miller <davem@davemloft.net>2016-01-04 22:49:59 -0500
commit538950a1b7527a0a52ccd9337e3fcd304f027f13 (patch)
tree2ecd86127a55719e61ea9a37aeb1cc7be8022d0f /include
parente32ea7e747271a0abcd37e265005e97cc81d9df5 (diff)
downloadlinux-538950a1b7527a0a52ccd9337e3fcd304f027f13.tar.bz2
soreuseport: setsockopt SO_ATTACH_REUSEPORT_[CE]BPF
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>
Diffstat (limited to 'include')
-rw-r--r--include/linux/filter.h2
-rw-r--r--include/net/sock_reuseport.h10
-rw-r--r--include/net/udp.h5
-rw-r--r--include/uapi/asm-generic/socket.h3
4 files changed, 17 insertions, 3 deletions
diff --git a/include/linux/filter.h b/include/linux/filter.h
index 4165e9ac9e36..294c3cdf07b3 100644
--- a/include/linux/filter.h
+++ b/include/linux/filter.h
@@ -447,6 +447,8 @@ void bpf_prog_destroy(struct bpf_prog *fp);
int sk_attach_filter(struct sock_fprog *fprog, struct sock *sk);
int sk_attach_bpf(u32 ufd, struct sock *sk);
+int sk_reuseport_attach_filter(struct sock_fprog *fprog, struct sock *sk);
+int sk_reuseport_attach_bpf(u32 ufd, struct sock *sk);
int sk_detach_filter(struct sock *sk);
int sk_get_filter(struct sock *sk, struct sock_filter __user *filter,
unsigned int len);
diff --git a/include/net/sock_reuseport.h b/include/net/sock_reuseport.h
index 67d1eb8fd7af..7dda3d7adba8 100644
--- a/include/net/sock_reuseport.h
+++ b/include/net/sock_reuseport.h
@@ -1,6 +1,8 @@
#ifndef _SOCK_REUSEPORT_H
#define _SOCK_REUSEPORT_H
+#include <linux/filter.h>
+#include <linux/skbuff.h>
#include <linux/types.h>
#include <net/sock.h>
@@ -9,12 +11,18 @@ struct sock_reuseport {
u16 max_socks; /* length of socks */
u16 num_socks; /* elements in socks */
+ struct bpf_prog __rcu *prog; /* optional BPF sock selector */
struct sock *socks[0]; /* array of sock pointers */
};
extern int reuseport_alloc(struct sock *sk);
extern int reuseport_add_sock(struct sock *sk, const struct sock *sk2);
extern void reuseport_detach_sock(struct sock *sk);
-extern struct sock *reuseport_select_sock(struct sock *sk, u32 hash);
+extern struct sock *reuseport_select_sock(struct sock *sk,
+ u32 hash,
+ struct sk_buff *skb,
+ int hdr_len);
+extern struct bpf_prog *reuseport_attach_prog(struct sock *sk,
+ struct bpf_prog *prog);
#endif /* _SOCK_REUSEPORT_H */
diff --git a/include/net/udp.h b/include/net/udp.h
index 3b5d7f93bc23..2842541e28e7 100644
--- a/include/net/udp.h
+++ b/include/net/udp.h
@@ -258,7 +258,7 @@ struct sock *udp4_lib_lookup(struct net *net, __be32 saddr, __be16 sport,
__be32 daddr, __be16 dport, int dif);
struct sock *__udp4_lib_lookup(struct net *net, __be32 saddr, __be16 sport,
__be32 daddr, __be16 dport, int dif,
- struct udp_table *tbl);
+ struct udp_table *tbl, struct sk_buff *skb);
struct sock *udp6_lib_lookup(struct net *net,
const struct in6_addr *saddr, __be16 sport,
const struct in6_addr *daddr, __be16 dport,
@@ -266,7 +266,8 @@ struct sock *udp6_lib_lookup(struct net *net,
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 *tbl);
+ int dif, struct udp_table *tbl,
+ struct sk_buff *skb);
/*
* SNMP statistics for UDP and UDP-Lite
diff --git a/include/uapi/asm-generic/socket.h b/include/uapi/asm-generic/socket.h
index 5c15c2a5c123..fb8a41668382 100644
--- a/include/uapi/asm-generic/socket.h
+++ b/include/uapi/asm-generic/socket.h
@@ -87,4 +87,7 @@
#define SO_ATTACH_BPF 50
#define SO_DETACH_BPF SO_DETACH_FILTER
+#define SO_ATTACH_REUSEPORT_CBPF 51
+#define SO_ATTACH_REUSEPORT_EBPF 52
+
#endif /* __ASM_GENERIC_SOCKET_H */