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_GRE)
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
72extern struct arglist *uml_parse_vector_ifspec(char *arg);
73
74extern struct vector_fds *uml_vector_user_open(
75 int unit,
76 struct arglist *parsed
77);
78
79extern char *uml_vector_fetch_arg(
80 struct arglist *ifspec,
81 char *token
82);
83
84extern int uml_vector_recvmsg(int fd, void *hdr, int flags);
85extern int uml_vector_sendmsg(int fd, void *hdr, int flags);
86extern int uml_vector_writev(int fd, void *hdr, int iovcount);
87extern int uml_vector_sendmmsg(
88 int fd, void *msgvec,
89 unsigned int vlen,
90 unsigned int flags
91);
92extern int uml_vector_recvmmsg(
93 int fd,
94 void *msgvec,
95 unsigned int vlen,
96 unsigned int flags
97);
98extern void *uml_vector_default_bpf(const void *mac);
99extern void *uml_vector_user_bpf(char *filename);
100extern int uml_vector_attach_bpf(int fd, void *bpf);
101extern int uml_vector_detach_bpf(int fd, void *bpf);
102extern bool uml_raw_enable_qdisc_bypass(int fd);
103extern bool uml_raw_enable_vnet_headers(int fd);
104extern bool uml_tap_enable_vnet_headers(int fd);
105
106
107#endif
108

source code of linux/arch/um/drivers/vector_user.h