arch/um/drivers/vector_user.h

   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
  45 struct 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
  56 struct 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
  67 extern struct arglist *uml_parse_vector_ifspec(char *arg);
  68
  69 extern struct vector_fds *uml_vector_user_open(
  70         int unit,
  71         struct arglist *parsed
  72 );
  73
  74 extern char *uml_vector_fetch_arg(
  75         struct arglist *ifspec,
  76         char *token
  77 );
  78
  79 extern int uml_vector_recvmsg(int fd, void *hdr, int flags);
  80 extern int uml_vector_sendmsg(int fd, void *hdr, int flags);
  81 extern int uml_vector_writev(int fd, void *hdr, int iovcount);
  82 extern int uml_vector_sendmmsg(
  83         int fd, void *msgvec,
  84         unsigned int vlen,
  85         unsigned int flags
  86 );
  87 extern int uml_vector_recvmmsg(
  88         int fd,
  89         void *msgvec,
  90         unsigned int vlen,
  91         unsigned int flags
  92 );
  93 extern void *uml_vector_default_bpf(int fd, void *mac);
  94 extern int uml_vector_attach_bpf(int fd, void *bpf, int bpf_len);
  95 extern bool uml_raw_enable_qdisc_bypass(int fd);
  96 extern bool uml_raw_enable_vnet_headers(int fd);
  97 extern bool uml_tap_enable_vnet_headers(int fd);
  98
  99
 100 #endif