LXR linux/arch/um/drivers/vector

   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
  52struct 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
  63struct 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
  74extern struct arglist *uml_parse_vector_ifspec(char *arg);
  75
  76extern struct vector_fds *uml_vector_user_open(
  77        int unit,
  78        struct arglist *parsed
  79);
  80
  81extern char *uml_vector_fetch_arg(
  82        struct arglist *ifspec,
  83        char *token
  84);
  85
  86extern int uml_vector_recvmsg(int fd, void *hdr, int flags);
  87extern int uml_vector_sendmsg(int fd, void *hdr, int flags);
  88extern int uml_vector_writev(int fd, void *hdr, int iovcount);
  89extern int uml_vector_sendmmsg(
  90        int fd, void *msgvec,
  91        unsigned int vlen,
  92        unsigned int flags
  93);
  94extern int uml_vector_recvmmsg(
  95        int fd,
  96        void *msgvec,
  97        unsigned int vlen,
  98        unsigned int flags
  99);
 100extern void *uml_vector_default_bpf(void *mac);
 101extern void *uml_vector_user_bpf(char *filename);
 102extern int uml_vector_attach_bpf(int fd, void *bpf);
 103extern int uml_vector_detach_bpf(int fd, void *bpf);
 104extern bool uml_raw_enable_qdisc_bypass(int fd);
 105extern bool uml_raw_enable_vnet_headers(int fd);
 106extern bool uml_tap_enable_vnet_headers(int fd);
 107
 108
 109#endif
 110