xref: /openbmc/linux/arch/um/drivers/vector_user.h (revision 6c7667c9)
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 
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 
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(const void *mac);
99 extern void *uml_vector_user_bpf(char *filename);
100 extern int uml_vector_attach_bpf(int fd, void *bpf);
101 extern int uml_vector_detach_bpf(int fd, void *bpf);
102 extern bool uml_raw_enable_qdisc_bypass(int fd);
103 extern bool uml_raw_enable_vnet_headers(int fd);
104 extern bool uml_tap_enable_vnet_headers(int fd);
105 
106 
107 #endif
108