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| author | Willem de Bruijn <willemb@google.com> | 2015-08-15 04:31:34 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-08-17 23:22:47 +0200 |
| commit | 47dceb8ecdc1c3ad1818dfea3d659a05b74c3fc2 (patch) | |
| tree | 6329539935535b2b5ed438612464e168b02f03ce /net/packet/internal.h | |
| parent | lwtunnel: rename ip lwtunnel attributes (diff) | |
| download | linux-47dceb8ecdc1c3ad1818dfea3d659a05b74c3fc2.tar.xz linux-47dceb8ecdc1c3ad1818dfea3d659a05b74c3fc2.zip | |
packet: add classic BPF fanout mode
Add fanout mode PACKET_FANOUT_CBPF that accepts a classic BPF program
to select a socket.
This avoids having to keep adding special case fanout modes. One
example use case is application layer load balancing. The QUIC
protocol, for instance, encodes a connection ID in UDP payload.
Also add socket option SOL_PACKET/PACKET_FANOUT_DATA that updates data
associated with the socket group. Fanout mode PACKET_FANOUT_CBPF is the
only user so far.
Signed-off-by: Willem de Bruijn <willemb@google.com>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/packet/internal.h')
| -rw-r--r-- | net/packet/internal.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/net/packet/internal.h b/net/packet/internal.h index e20b3e8829b8..9ee46314b7d7 100644 --- a/net/packet/internal.h +++ b/net/packet/internal.h @@ -79,7 +79,10 @@ struct packet_fanout { u16 id; u8 type; u8 flags; - atomic_t rr_cur; + union { + atomic_t rr_cur; + struct bpf_prog __rcu *bpf_prog; + }; struct list_head list; struct sock *arr[PACKET_FANOUT_MAX]; spinlock_t lock; |