diff options
| author | Patrick McHardy <kaber@trash.net> | 2013-04-17 08:47:01 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-04-19 20:57:57 +0200 |
| commit | ccdfcc398594ddf3f77348c5a10938dbe9efefbe (patch) | |
| tree | 5458e0eca52d0488e8c24c8587028b5bd29b60de /include | |
| parent | netlink: add netlink_skb_set_owner_r() (diff) | |
| download | linux-ccdfcc398594ddf3f77348c5a10938dbe9efefbe.tar.xz linux-ccdfcc398594ddf3f77348c5a10938dbe9efefbe.zip | |
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 'include')
| -rw-r--r-- | include/uapi/linux/netlink.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/include/uapi/linux/netlink.h b/include/uapi/linux/netlink.h index 32a354f67ba4..1a85940f8ab7 100644 --- a/include/uapi/linux/netlink.h +++ b/include/uapi/linux/netlink.h @@ -1,6 +1,7 @@ #ifndef _UAPI__LINUX_NETLINK_H #define _UAPI__LINUX_NETLINK_H +#include <linux/kernel.h> #include <linux/socket.h> /* for __kernel_sa_family_t */ #include <linux/types.h> @@ -105,11 +106,42 @@ struct nlmsgerr { #define NETLINK_PKTINFO 3 #define NETLINK_BROADCAST_ERROR 4 #define NETLINK_NO_ENOBUFS 5 +#define NETLINK_RX_RING 6 +#define NETLINK_TX_RING 7 struct nl_pktinfo { __u32 group; }; +struct nl_mmap_req { + unsigned int nm_block_size; + unsigned int nm_block_nr; + unsigned int nm_frame_size; + unsigned int nm_frame_nr; +}; + +struct nl_mmap_hdr { + unsigned int nm_status; + unsigned int nm_len; + __u32 nm_group; + /* credentials */ + __u32 nm_pid; + __u32 nm_uid; + __u32 nm_gid; +}; + +enum nl_mmap_status { + NL_MMAP_STATUS_UNUSED, + NL_MMAP_STATUS_RESERVED, + NL_MMAP_STATUS_VALID, + NL_MMAP_STATUS_COPY, + NL_MMAP_STATUS_SKIP, +}; + +#define NL_MMAP_MSG_ALIGNMENT NLMSG_ALIGNTO +#define NL_MMAP_MSG_ALIGN(sz) __ALIGN_KERNEL(sz, NL_MMAP_MSG_ALIGNMENT) +#define NL_MMAP_HDRLEN NL_MMAP_MSG_ALIGN(sizeof(struct nl_mmap_hdr)) + #define NET_MAJOR 36 /* Major 36 is reserved for networking */ enum { |