arch/um/drivers/vector_user.h

   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 #define DEFAULT_BPF_LEN 6
  32
  33 #ifndef IPPROTO_GRE
  34 #define IPPROTO_GRE 0x2F
  35 #endif
  36
  37 #define GRE_MODE_CHECKSUM       cpu_to_be16(8 << 12)    /* checksum */
  38 #define GRE_MODE_RESERVED       cpu_to_be16(4 << 12)    /* unused */
  39 #define GRE_MODE_KEY            cpu_to_be16(2 << 12)    /* KEY present */
  40 #define GRE_MODE_SEQUENCE       cpu_to_be16(1 << 12)    /* sequence */
  41
  42 #define GRE_IRB cpu_to_be16(0x6558)
  43
  44 #define L2TPV3_DATA_PACKET 0x30000
  45
  46 /* IANA-assigned IP protocol ID for L2TPv3 */
  47
  48 #ifndef IPPROTO_L2TP
  49 #define IPPROTO_L2TP 0x73
  50 #endif
  51
  52 struct arglist {
  53         int     numargs;
  54         char    *tokens[MAXVARGS];
  55         char    *values[MAXVARGS];
  56 };
  57
  58 /* Separating read and write FDs allows us to have different
  59  * rx and tx method. Example - read tap via raw socket using
  60  * recvmmsg, write using legacy tap write calls
  61  */
  62
  63 struct vector_fds {
  64         int rx_fd;
  65         int tx_fd;
  66         void *remote_addr;
  67         int remote_addr_size;
  68 };
  69
  70 #define VECTOR_READ     1
  71 #define VECTOR_WRITE    (1 < 1)
  72 #define VECTOR_HEADERS  (1 < 2)
  73
  74 extern struct arglist *uml_parse_vector_ifspec(char *arg);
  75
  76 extern struct vector_fds *uml_vector_user_open(
  77         int unit,
  78         struct arglist *parsed
  79 );
  80
  81 extern char *uml_vector_fetch_arg(
  82         struct arglist *ifspec,
  83         char *token
  84 );
  85
  86 extern int uml_vector_recvmsg(int fd, void *hdr, int flags);
  87 extern int uml_vector_sendmsg(int fd, void *hdr, int flags);
  88 extern int uml_vector_writev(int fd, void *hdr, int iovcount);
  89 extern int uml_vector_sendmmsg(
  90         int fd, void *msgvec,
  91         unsigned int vlen,
  92         unsigned int flags
  93 );
  94 extern int uml_vector_recvmmsg(
  95         int fd,
  96         void *msgvec,
  97         unsigned int vlen,
  98         unsigned int flags
  99 );
 100 extern void *uml_vector_default_bpf(void *mac);
 101 extern void *uml_vector_user_bpf(char *filename);
 102 extern int uml_vector_attach_bpf(int fd, void *bpf);
 103 extern int uml_vector_detach_bpf(int fd, void *bpf);
 104 extern bool uml_raw_enable_qdisc_bypass(int fd);
 105 extern bool uml_raw_enable_vnet_headers(int fd);
 106 extern bool uml_tap_enable_vnet_headers(int fd);
 107
 108
 109 #endif