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| author | Neil Horman <nhorman@tuxdriver.com> | 2014-01-22 22:01:44 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-01-23 02:35:50 +0100 |
| commit | 2d36097d26b5991d71a2cf4a20c1a158f0f1bfcd (patch) | |
| tree | 86ad219b1481a17780efec984c314e1b0f6bc87e /net/packet | |
| parent | Merge branch 'bonding_option_api' (diff) | |
| download | linux-2d36097d26b5991d71a2cf4a20c1a158f0f1bfcd.tar.xz linux-2d36097d26b5991d71a2cf4a20c1a158f0f1bfcd.zip | |
af_packet: Add Queue mapping mode to af_packet fanout operation
This patch adds a queue mapping mode to the fanout operation of af_packet
sockets. This allows user space af_packet users to better filter on flows
ingressing and egressing via a specific hardware queue, and avoids the potential
packet reordering that can occur when FANOUT_CPU is being used and irq affinity
varies.
Tested successfully by myself. applies to net-next
Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
CC: "David S. Miller" <davem@davemloft.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/packet')
| -rw-r--r-- | net/packet/af_packet.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c index 97346162803d..6a2bb37506c5 100644 --- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -1312,6 +1312,13 @@ static unsigned int fanout_demux_rollover(struct packet_fanout *f, return idx; } +static unsigned int fanout_demux_qm(struct packet_fanout *f, + struct sk_buff *skb, + unsigned int num) +{ + return skb_get_queue_mapping(skb) % num; +} + static bool fanout_has_flag(struct packet_fanout *f, u16 flag) { return f->flags & (flag >> 8); @@ -1351,6 +1358,9 @@ static int packet_rcv_fanout(struct sk_buff *skb, struct net_device *dev, case PACKET_FANOUT_RND: idx = fanout_demux_rnd(f, skb, num); break; + case PACKET_FANOUT_QM: + idx = fanout_demux_qm(f, skb, num); + break; case PACKET_FANOUT_ROLLOVER: idx = fanout_demux_rollover(f, skb, 0, (unsigned int) -1, num); break; @@ -1421,6 +1431,7 @@ static int fanout_add(struct sock *sk, u16 id, u16 type_flags) case PACKET_FANOUT_LB: case PACKET_FANOUT_CPU: case PACKET_FANOUT_RND: + case PACKET_FANOUT_QM: break; default: return -EINVAL; |