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author | David S. Miller <davem@davemloft.net> | 2011-07-05 01:45:05 -0700 |
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committer | David S. Miller <davem@davemloft.net> | 2011-07-05 22:34:52 -0700 |
commit | dc99f600698dcac69b8f56dda9a8a00d645c5ffc (patch) | |
tree | 81599e4397761610d5020c03e2571eeceaa859b6 /include/linux/if_packet.h | |
parent | ce06b03e60fc19c680d1bf873e779bf11c2fc518 (diff) | |
download | linux-dc99f600698dcac69b8f56dda9a8a00d645c5ffc.tar.gz linux-dc99f600698dcac69b8f56dda9a8a00d645c5ffc.tar.bz2 linux-dc99f600698dcac69b8f56dda9a8a00d645c5ffc.zip |
packet: Add fanout support.
Fanouts allow packet capturing to be demuxed to a set of AF_PACKET
sockets. Two fanout policies are implemented:
1) Hashing based upon skb->rxhash
2) Pure round-robin
An AF_PACKET socket must be fully bound before it tries to add itself
to a fanout. All AF_PACKET sockets trying to join the same fanout
must all have the same bind settings.
Fanouts are identified (within a network namespace) by a 16-bit ID.
The first socket to try to add itself to a fanout with a particular
ID, creates that fanout. When the last socket leaves the fanout
(which happens only when the socket is closed), that fanout is
destroyed.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/if_packet.h')
-rw-r--r-- | include/linux/if_packet.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/if_packet.h b/include/linux/if_packet.h index 7b318630139f..1efa1cb827f5 100644 --- a/include/linux/if_packet.h +++ b/include/linux/if_packet.h @@ -49,6 +49,10 @@ struct sockaddr_ll { #define PACKET_VNET_HDR 15 #define PACKET_TX_TIMESTAMP 16 #define PACKET_TIMESTAMP 17 +#define PACKET_FANOUT 18 + +#define PACKET_FANOUT_HASH 0 +#define PACKET_FANOUT_LB 1 struct tpacket_stats { unsigned int tp_packets; |