root/arch/um/drivers/vector_user.h

INCLUDED FROM

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (C) 2002 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
   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 #define TRANS_GRE "gre"
  20 #define TRANS_GRE_LEN strlen(TRANS_RAW)
  21 
  22 #define TRANS_L2TPV3 "l2tpv3"
  23 #define TRANS_L2TPV3_LEN strlen(TRANS_L2TPV3)
  24 
  25 #define TRANS_HYBRID "hybrid"
  26 #define TRANS_HYBRID_LEN strlen(TRANS_HYBRID)
  27 
  28 #define TRANS_BESS "bess"
  29 #define TRANS_BESS_LEN strlen(TRANS_BESS)
  30 
  31 #ifndef IPPROTO_GRE
  32 #define IPPROTO_GRE 0x2F
  33 #endif
  34 
  35 #define GRE_MODE_CHECKSUM       cpu_to_be16(8 << 12)    /* checksum */
  36 #define GRE_MODE_RESERVED       cpu_to_be16(4 << 12)    /* unused */
  37 #define GRE_MODE_KEY            cpu_to_be16(2 << 12)    /* KEY present */
  38 #define GRE_MODE_SEQUENCE       cpu_to_be16(1 << 12)    /* sequence */
  39 
  40 #define GRE_IRB cpu_to_be16(0x6558)
  41 
  42 #define L2TPV3_DATA_PACKET 0x30000
  43 
  44 /* IANA-assigned IP protocol ID for L2TPv3 */
  45 
  46 #ifndef IPPROTO_L2TP
  47 #define IPPROTO_L2TP 0x73
  48 #endif
  49 
  50 struct arglist {
  51         int     numargs;
  52         char    *tokens[MAXVARGS];
  53         char    *values[MAXVARGS];
  54 };
  55 
  56 /* Separating read and write FDs allows us to have different
  57  * rx and tx method. Example - read tap via raw socket using
  58  * recvmmsg, write using legacy tap write calls
  59  */
  60 
  61 struct vector_fds {
  62         int rx_fd;
  63         int tx_fd;
  64         void *remote_addr;
  65         int remote_addr_size;
  66 };
  67 
  68 #define VECTOR_READ     1
  69 #define VECTOR_WRITE    (1 < 1)
  70 #define VECTOR_HEADERS  (1 < 2)
  71 
  72 extern struct arglist *uml_parse_vector_ifspec(char *arg);
  73 
  74 extern struct vector_fds *uml_vector_user_open(
  75         int unit,
  76         struct arglist *parsed
  77 );
  78 
  79 extern char *uml_vector_fetch_arg(
  80         struct arglist *ifspec,
  81         char *token
  82 );
  83 
  84 extern int uml_vector_recvmsg(int fd, void *hdr, int flags);
  85 extern int uml_vector_sendmsg(int fd, void *hdr, int flags);
  86 extern int uml_vector_writev(int fd, void *hdr, int iovcount);
  87 extern int uml_vector_sendmmsg(
  88         int fd, void *msgvec,
  89         unsigned int vlen,
  90         unsigned int flags
  91 );
  92 extern int uml_vector_recvmmsg(
  93         int fd,
  94         void *msgvec,
  95         unsigned int vlen,
  96         unsigned int flags
  97 );
  98 extern void *uml_vector_default_bpf(int fd, void *mac);
  99 extern int uml_vector_attach_bpf(int fd, void *bpf, int bpf_len);
 100 extern bool uml_raw_enable_qdisc_bypass(int fd);
 101 extern bool uml_raw_enable_vnet_headers(int fd);
 102 extern bool uml_tap_enable_vnet_headers(int fd);
 103 
 104 
 105 #endif