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.
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| @@ -1,6 +1,7 @@ | |||
| 1 | #ifndef _UAPI__LINUX_NETLINK_H | 1 | #ifndef _UAPI__LINUX_NETLINK_H |
| 2 | #define _UAPI__LINUX_NETLINK_H | 2 | #define _UAPI__LINUX_NETLINK_H |
| 3 | 3 | ||
| 4 | #include <linux/kernel.h> | ||
| 4 | #include <linux/socket.h> /* for __kernel_sa_family_t */ | 5 | #include <linux/socket.h> /* for __kernel_sa_family_t */ |
| 5 | #include <linux/types.h> | 6 | #include <linux/types.h> |
| 6 | 7 | ||
| @@ -105,11 +106,42 @@ struct nlmsgerr { · 98 unmodified lines | |||
| 105 | #define NETLINK_PKTINFO 3 | 106 | #define NETLINK_PKTINFO 3 |
| 106 | #define NETLINK_BROADCAST_ERROR 4 | 107 | #define NETLINK_BROADCAST_ERROR 4 |
| 107 | #define NETLINK_NO_ENOBUFS 5 | 108 | #define NETLINK_NO_ENOBUFS 5 |
| 109 | #define NETLINK_RX_RING 6 | ||
| 110 | #define NETLINK_TX_RING 7 | ||
| 108 | 111 | ||
| 109 | struct nl_pktinfo { | 112 | struct nl_pktinfo { |
| 110 | __u32 group; | 113 | __u32 group; |
| 111 | }; | 114 | }; |
| 112 | 115 | ||
| 116 | struct nl_mmap_req { | ||
| 117 | unsigned int nm_block_size; | ||
| 118 | unsigned int nm_block_nr; | ||
| 119 | unsigned int nm_frame_size; | ||
| 120 | unsigned int nm_frame_nr; | ||
| 121 | }; | ||
| 122 | |||
| 123 | struct nl_mmap_hdr { | ||
| 124 | unsigned int nm_status; | ||
| 125 | unsigned int nm_len; | ||
| 126 | __u32 nm_group; | ||
| 127 | /* credentials */ | ||
| 128 | __u32 nm_pid; | ||
| 129 | __u32 nm_uid; | ||
| 130 | __u32 nm_gid; | ||
| 131 | }; | ||
| 132 | |||
| 133 | enum nl_mmap_status { | ||
| 134 | NL_MMAP_STATUS_UNUSED, | ||
| 135 | NL_MMAP_STATUS_RESERVED, | ||
| 136 | NL_MMAP_STATUS_VALID, | ||
| 137 | NL_MMAP_STATUS_COPY, | ||
| 138 | NL_MMAP_STATUS_SKIP, | ||
| 139 | }; | ||
| 140 | |||
| 141 | #define NL_MMAP_MSG_ALIGNMENT NLMSG_ALIGNTO | ||
| 142 | #define NL_MMAP_MSG_ALIGN(sz) __ALIGN_KERNEL(sz, NL_MMAP_MSG_ALIGNMENT) | ||
| 143 | #define NL_MMAP_HDRLEN NL_MMAP_MSG_ALIGN(sizeof(struct nl_mmap_hdr)) | ||
| 144 | |||
| 113 | #define NET_MAJOR 36 /* Major 36 is reserved for networking */ | 145 | #define NET_MAJOR 36 /* Major 36 is reserved for networking */ |
| 114 | 146 | ||
| 115 | enum { | 147 | enum { |