diff options
| author | Patrick McHardy <kaber@trash.net> | 2013-04-17 06:47:01 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-04-19 14:57:57 -0400 |
| commit | ccdfcc398594ddf3f77348c5a10938dbe9efefbe (patch) | |
| tree | 5458e0eca52d0488e8c24c8587028b5bd29b60de /net/netlink/af_netlink.h | |
| parent | cf0a018ac669955c10e4fca24fa55dde58434e9a (diff) | |
| download | linux-rt-ccdfcc398594ddf3f77348c5a10938dbe9efefbe.tar.gz | |
netlink: mmaped netlink: ring setup
Add support for mmap'ed RX and TX ring setup and teardown based on the
af_packet.c code. The following patches will use this to add the real
mmap'ed receive and transmit functionality.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/netlink/af_netlink.h')
| -rw-r--r-- | net/netlink/af_netlink.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/net/netlink/af_netlink.h b/net/netlink/af_netlink.h index d9acb2a1d855..ed8522265f4e 100644 --- a/net/netlink/af_netlink.h +++ b/net/netlink/af_netlink.h @@ -6,6 +6,20 @@ #define NLGRPSZ(x) (ALIGN(x, sizeof(unsigned long) * 8) / 8) #define NLGRPLONGS(x) (NLGRPSZ(x)/sizeof(unsigned long)) +struct netlink_ring { + void **pg_vec; + unsigned int head; + unsigned int frames_per_block; + unsigned int frame_size; + unsigned int frame_max; + + unsigned int pg_vec_order; + unsigned int pg_vec_pages; + unsigned int pg_vec_len; + + atomic_t pending; +}; + struct netlink_sock { /* struct sock has to be the first member of netlink_sock */ struct sock sk; @@ -24,6 +38,12 @@ struct netlink_sock { void (*netlink_rcv)(struct sk_buff *skb); void (*netlink_bind)(int group); struct module *module; +#ifdef CONFIG_NETLINK_MMAP + struct mutex pg_vec_lock; + struct netlink_ring rx_ring; + struct netlink_ring tx_ring; + atomic_t mapped; +#endif /* CONFIG_NETLINK_MMAP */ }; static inline struct netlink_sock *nlk_sk(struct sock *sk) |