diff options
| author | Eric Dumazet <eric.dumazet@gmail.com> | 2009-11-08 10:17:58 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-11-08 20:53:06 -0800 |
| commit | 512615b6b843ff3ff5ad583f34c39b3f302f5f26 (patch) | |
| tree | 7420705a314bc691bc478225148935dc67f71904 /include/linux | |
| parent | d4cada4ae1c012815f95fa507eb86a0ae9d607d7 (diff) | |
udp: secondary hash on (local port, local address)
Extends udp_table to contain a secondary hash table.
socket anchor for this second hash is free, because UDP
doesnt use skc_bind_node : We define an union to hold
both skc_bind_node & a new hlist_nulls_node udp_portaddr_node
udp_lib_get_port() inserts sockets into second hash chain
(additional cost of one atomic op)
udp_lib_unhash() deletes socket from second hash chain
(additional cost of one atomic op)
Note : No spinlock lockdep annotation is needed, because
lock for the secondary hash chain is always get after
lock for primary hash chain.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/udp.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/udp.h b/include/linux/udp.h index 5b4b5274e683..59f0ddf2d284 100644 --- a/include/linux/udp.h +++ b/include/linux/udp.h @@ -57,6 +57,7 @@ struct udp_sock { struct inet_sock inet; #define udp_port_hash inet.sk.__sk_common.skc_u16hashes[0] #define udp_portaddr_hash inet.sk.__sk_common.skc_u16hashes[1] +#define udp_portaddr_node inet.sk.__sk_common.skc_portaddr_node int pending; /* Any pending frames ? */ unsigned int corkflag; /* Cork is required */ __u16 encap_type; /* Is this an Encapsulation socket? */ |