LXR linux/arch/um/drivers/vector

   1/*
   2 * Copyright (C) 2002 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
   3 * Licensed under the GPL
   4 */
   5
   6#ifndef __UM_VECTOR_USER_H
   7#define __UM_VECTOR_USER_H
   8
   9#define MAXVARGS        20
  10
  11#define TOKEN_IFNAME "ifname"
  12
  13#define TRANS_RAW "raw"
  14#define TRANS_RAW_LEN strlen(TRANS_RAW)
  15
  16#define TRANS_TAP "tap"
  17#define TRANS_TAP_LEN strlen(TRANS_TAP)
  18
  19
  20#define TRANS_GRE "gre"
  21#define TRANS_GRE_LEN strlen(TRANS_RAW)
  22
  23#define TRANS_L2TPV3 "l2tpv3"
  24#define TRANS_L2TPV3_LEN strlen(TRANS_L2TPV3)
  25
  26#ifndef IPPROTO_GRE
  27#define IPPROTO_GRE 0x2F
  28#endif
  29
  30#define GRE_MODE_CHECKSUM       cpu_to_be16(8 << 12)    /* checksum */
  31#define GRE_MODE_RESERVED       cpu_to_be16(4 << 12)    /* unused */
  32#define GRE_MODE_KEY            cpu_to_be16(2 << 12)    /* KEY present */
  33#define GRE_MODE_SEQUENCE       cpu_to_be16(1 << 12)    /* sequence */
  34
  35#define GRE_IRB cpu_to_be16(0x6558)
  36
  37#define L2TPV3_DATA_PACKET 0x30000
  38
  39/* IANA-assigned IP protocol ID for L2TPv3 */
  40
  41#ifndef IPPROTO_L2TP
  42#define IPPROTO_L2TP 0x73
  43#endif
  44
  45struct arglist {
  46        int     numargs;
  47        char    *tokens[MAXVARGS];
  48        char    *values[MAXVARGS];
  49};
  50
  51/* Separating read and write FDs allows us to have different
  52 * rx and tx method. Example - read tap via raw socket using
  53 * recvmmsg, write using legacy tap write calls
  54 */
  55
  56struct vector_fds {
  57        int rx_fd;
  58        int tx_fd;
  59        void *remote_addr;
  60        int remote_addr_size;
  61};
  62
  63#define VECTOR_READ     1
  64#define VECTOR_WRITE    (1 < 1)
  65#define VECTOR_HEADERS  (1 < 2)
  66
  67extern struct arglist *uml_parse_vector_ifspec(char *arg);
  68
  69extern struct vector_fds *uml_vector_user_open(
  70        int unit,
  71        struct arglist *parsed
  72);
  73
  74extern char *uml_vector_fetch_arg(
  75        struct arglist *ifspec,
  76        char *token
  77);
  78
  79extern int uml_vector_recvmsg(int fd, void *hdr, int flags);
  80extern int uml_vector_sendmsg(int fd, void *hdr, int flags);
  81extern int uml_vector_writev(int fd, void *hdr, int iovcount);
  82extern int uml_vector_sendmmsg(
  83        int fd, void *msgvec,
  84        unsigned int vlen,
  85        unsigned int flags
  86);
  87extern int uml_vector_recvmmsg(
  88        int fd,
  89        void *msgvec,
  90        unsigned int vlen,
  91        unsigned int flags
  92);
  93extern void *uml_vector_default_bpf(int fd, void *mac);
  94extern int uml_vector_attach_bpf(int fd, void *bpf, int bpf_len);
  95extern bool uml_raw_enable_qdisc_bypass(int fd);
  96extern bool uml_raw_enable_vnet_headers(int fd);
  97extern bool uml_tap_enable_vnet_headers(int fd);
  98
  99
 100#endif
 101