diff options
| author | Craig Gallek <kraig@google.com> | 2016-02-10 11:50:40 -0500 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-02-11 03:54:15 -0500 |
| commit | c125e80b88687b25b321795457309eaaee4bf270 (patch) | |
| tree | d61eb6c67a62046691c8f354c0fad948ef298f99 /net/ipv6 | |
| parent | fa463497679352c04d201631534955e6be66eef8 (diff) | |
| download | linux-c125e80b88687b25b321795457309eaaee4bf270.tar.bz2 | |
soreuseport: fast reuseport TCP socket selection
This change extends the fast SO_REUSEPORT socket lookup implemented
for UDP to TCP. Listener sockets with SO_REUSEPORT and the same
receive address are additionally added to an array for faster
random access. This means that only a single socket from the group
must be found in the listener list before any socket in the group can
be used to receive a packet. Previously, every socket in the group
needed to be considered before handing off the incoming packet.
This feature also exposes the ability to use a BPF program when
selecting a socket from a reuseport group.
Signed-off-by: Craig Gallek <kraig@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/inet6_connection_sock.c | 2 | ||||
| -rw-r--r-- | net/ipv6/inet6_hashtables.c | 16 |
2 files changed, 17 insertions, 1 deletions
diff --git a/net/ipv6/inet6_connection_sock.c b/net/ipv6/inet6_connection_sock.c index 36c3f0155010..532c3ef282c5 100644 --- a/net/ipv6/inet6_connection_sock.c +++ b/net/ipv6/inet6_connection_sock.c @@ -26,6 +26,7 @@ #include <net/ip6_route.h> #include <net/sock.h> #include <net/inet6_connection_sock.h> +#include <net/sock_reuseport.h> int inet6_csk_bind_conflict(const struct sock *sk, const struct inet_bind_bucket *tb, bool relax) @@ -48,6 +49,7 @@ int inet6_csk_bind_conflict(const struct sock *sk, if ((!reuse || !sk2->sk_reuse || sk2->sk_state == TCP_LISTEN) && (!reuseport || !sk2->sk_reuseport || + rcu_access_pointer(sk->sk_reuseport_cb) || (sk2->sk_state != TCP_TIME_WAIT && !uid_eq(uid, sock_i_uid((struct sock *)sk2))))) { diff --git a/net/ipv6/inet6_hashtables.c b/net/ipv6/inet6_hashtables.c index 004345d26808..70f2628be6fa 100644 --- a/net/ipv6/inet6_hashtables.c +++ b/net/ipv6/inet6_hashtables.c @@ -17,11 +17,13 @@ #include <linux/module.h> #include <linux/random.h> +#include <net/addrconf.h> #include <net/inet_connection_sock.h> #include <net/inet_hashtables.h> #include <net/inet6_hashtables.h> #include <net/secure_seq.h> #include <net/ip.h> +#include <net/sock_reuseport.h> u32 inet6_ehashfn(const struct net *net, const struct in6_addr *laddr, const u16 lport, @@ -131,6 +133,7 @@ struct sock *inet6_lookup_listener(struct net *net, const struct hlist_nulls_node *node; struct sock *result; int score, hiscore, matches = 0, reuseport = 0; + bool select_ok = true; u32 phash = 0; unsigned int hash = inet_lhashfn(net, hnum); struct inet_listen_hashbucket *ilb = &hashinfo->listening_hash[hash]; @@ -148,6 +151,15 @@ begin: if (reuseport) { phash = inet6_ehashfn(net, daddr, hnum, saddr, sport); + if (select_ok) { + struct sock *sk2; + sk2 = reuseport_select_sock(sk, phash, + skb, doff); + if (sk2) { + result = sk2; + goto found; + } + } matches = 1; } } else if (score == hiscore && reuseport) { @@ -165,11 +177,13 @@ begin: if (get_nulls_value(node) != hash + LISTENING_NULLS_BASE) goto begin; if (result) { +found: if (unlikely(!atomic_inc_not_zero(&result->sk_refcnt))) result = NULL; else if (unlikely(compute_score(result, net, hnum, daddr, dif) < hiscore)) { sock_put(result); + select_ok = false; goto begin; } } @@ -283,7 +297,7 @@ int inet6_hash(struct sock *sk) { if (sk->sk_state != TCP_CLOSE) { local_bh_disable(); - __inet_hash(sk, NULL); + __inet_hash(sk, NULL, ipv6_rcv_saddr_equal); local_bh_enable(); } |