summaryrefslogtreecommitdiff
path: root/arch/um/drivers/vector_user.h
blob: 91f35b266abac69f5b319f4e71294b9a20f3dff3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (C) 2002 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
 */

#ifndef __UM_VECTOR_USER_H
#define __UM_VECTOR_USER_H

#define MAXVARGS	20

#define TOKEN_IFNAME "ifname"

#define TRANS_RAW "raw"
#define TRANS_RAW_LEN strlen(TRANS_RAW)

#define TRANS_TAP "tap"
#define TRANS_TAP_LEN strlen(TRANS_TAP)

#define TRANS_GRE "gre"
#define TRANS_GRE_LEN strlen(TRANS_RAW)

#define TRANS_L2TPV3 "l2tpv3"
#define TRANS_L2TPV3_LEN strlen(TRANS_L2TPV3)

#define TRANS_HYBRID "hybrid"
#define TRANS_HYBRID_LEN strlen(TRANS_HYBRID)

#define TRANS_BESS "bess"
#define TRANS_BESS_LEN strlen(TRANS_BESS)

#define DEFAULT_BPF_LEN 6

#ifndef IPPROTO_GRE
#define IPPROTO_GRE 0x2F
#endif

#define GRE_MODE_CHECKSUM	cpu_to_be16(8 << 12)	/* checksum */
#define GRE_MODE_RESERVED	cpu_to_be16(4 << 12)	/* unused */
#define GRE_MODE_KEY		cpu_to_be16(2 << 12)	/* KEY present */
#define GRE_MODE_SEQUENCE	cpu_to_be16(1 << 12)	/* sequence */

#define GRE_IRB cpu_to_be16(0x6558)

#define L2TPV3_DATA_PACKET 0x30000

/* IANA-assigned IP protocol ID for L2TPv3 */

#ifndef IPPROTO_L2TP
#define IPPROTO_L2TP 0x73
#endif

struct arglist {
	int	numargs;
	char	*tokens[MAXVARGS];
	char	*values[MAXVARGS];
};

/* Separating read and write FDs allows us to have different
 * rx and tx method. Example - read tap via raw socket using
 * recvmmsg, write using legacy tap write calls
 */

struct vector_fds {
	int rx_fd;
	int tx_fd;
	void *remote_addr;
	int remote_addr_size;
};

#define VECTOR_READ	1
#define VECTOR_WRITE	(1 < 1)
#define VECTOR_HEADERS	(1 < 2)

extern struct arglist *uml_parse_vector_ifspec(char *arg);

extern struct vector_fds *uml_vector_user_open(
	int unit,
	struct arglist *parsed
);

extern char *uml_vector_fetch_arg(
	struct arglist *ifspec,
	char *token
);

extern int uml_vector_recvmsg(int fd, void *hdr, int flags);
extern int uml_vector_sendmsg(int fd, void *hdr, int flags);
extern int uml_vector_writev(int fd, void *hdr, int iovcount);
extern int uml_vector_sendmmsg(
	int fd, void *msgvec,
	unsigned int vlen,
	unsigned int flags
);
extern int uml_vector_recvmmsg(
	int fd,
	void *msgvec,
	unsigned int vlen,
	unsigned int flags
);
extern void *uml_vector_default_bpf(void *mac);
extern void *uml_vector_user_bpf(char *filename);
extern int uml_vector_attach_bpf(int fd, void *bpf);
extern int uml_vector_detach_bpf(int fd, void *bpf);
extern bool uml_raw_enable_qdisc_bypass(int fd);
extern bool uml_raw_enable_vnet_headers(int fd);
extern bool uml_tap_enable_vnet_headers(int fd);


#endif