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Commit | Line | Data |
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d63a9b2b | 1 | /* |
541f1b3e | 2 | * iplink_macvlan.c macvlan/macvtap device support |
d63a9b2b AB |
3 | * |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | * | |
9 | * Authors: Patrick McHardy <kaber@trash.net> | |
10 | * Arnd Bergmann <arnd@arndb.de> | |
11 | */ | |
12 | ||
13 | #include <stdio.h> | |
14 | #include <stdlib.h> | |
15 | #include <string.h> | |
16 | #include <sys/socket.h> | |
17 | #include <linux/if_link.h> | |
18 | ||
19 | #include "rt_names.h" | |
20 | #include "utils.h" | |
21 | #include "ip_common.h" | |
22 | ||
541f1b3e PS |
23 | #define pfx_err(lu, ...) { \ |
24 | fprintf(stderr, "%s: ", lu->id); \ | |
25 | fprintf(stderr, __VA_ARGS__); \ | |
26 | fprintf(stderr, "\n"); \ | |
27 | } | |
28 | ||
29 | static void print_explain(struct link_util *lu, FILE *f) | |
d63a9b2b | 30 | { |
561e650e | 31 | fprintf(f, |
3cf8ba59 | 32 | "Usage: ... %s mode { private | vepa | bridge | passthru [nopromisc] }\n", |
541f1b3e | 33 | lu->id |
d63a9b2b AB |
34 | ); |
35 | } | |
36 | ||
541f1b3e | 37 | static void explain(struct link_util *lu) |
561e650e | 38 | { |
541f1b3e | 39 | print_explain(lu, stderr); |
561e650e | 40 | } |
41 | ||
541f1b3e | 42 | static int mode_arg(const char *arg) |
d63a9b2b | 43 | { |
56f5daac SH |
44 | fprintf(stderr, "Error: argument of \"mode\" must be \"private\", \"vepa\", \"bridge\" or \"passthru\", not \"%s\"\n", |
45 | arg); | |
46 | return -1; | |
d63a9b2b AB |
47 | } |
48 | ||
49 | static int macvlan_parse_opt(struct link_util *lu, int argc, char **argv, | |
50 | struct nlmsghdr *n) | |
51 | { | |
3cf8ba59 PS |
52 | __u32 mode = 0; |
53 | __u16 flags = 0; | |
54 | ||
d63a9b2b AB |
55 | while (argc > 0) { |
56 | if (matches(*argv, "mode") == 0) { | |
d63a9b2b AB |
57 | NEXT_ARG(); |
58 | ||
59 | if (strcmp(*argv, "private") == 0) | |
60 | mode = MACVLAN_MODE_PRIVATE; | |
61 | else if (strcmp(*argv, "vepa") == 0) | |
62 | mode = MACVLAN_MODE_VEPA; | |
63 | else if (strcmp(*argv, "bridge") == 0) | |
64 | mode = MACVLAN_MODE_BRIDGE; | |
f0612d56 SS |
65 | else if (strcmp(*argv, "passthru") == 0) |
66 | mode = MACVLAN_MODE_PASSTHRU; | |
d63a9b2b | 67 | else |
541f1b3e | 68 | return mode_arg(*argv); |
3cf8ba59 PS |
69 | } else if (matches(*argv, "nopromisc") == 0) { |
70 | flags |= MACVLAN_FLAG_NOPROMISC; | |
d63a9b2b | 71 | } else if (matches(*argv, "help") == 0) { |
541f1b3e | 72 | explain(lu); |
d63a9b2b AB |
73 | return -1; |
74 | } else { | |
541f1b3e PS |
75 | pfx_err(lu, "unknown option \"%s\"?", *argv); |
76 | explain(lu); | |
d63a9b2b AB |
77 | return -1; |
78 | } | |
79 | argc--, argv++; | |
80 | } | |
81 | ||
3cf8ba59 PS |
82 | if (mode) |
83 | addattr32(n, 1024, IFLA_MACVLAN_MODE, mode); | |
84 | ||
85 | if (flags) { | |
86 | if (flags & MACVLAN_FLAG_NOPROMISC && | |
87 | mode != MACVLAN_MODE_PASSTHRU) { | |
88 | pfx_err(lu, "nopromisc flag only valid in passthru mode"); | |
89 | explain(lu); | |
90 | return -1; | |
91 | } | |
92 | addattr16(n, 1024, IFLA_MACVLAN_FLAGS, flags); | |
93 | } | |
d63a9b2b AB |
94 | return 0; |
95 | } | |
96 | ||
97 | static void macvlan_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[]) | |
98 | { | |
99 | __u32 mode; | |
3cf8ba59 | 100 | __u16 flags; |
d63a9b2b AB |
101 | |
102 | if (!tb) | |
103 | return; | |
104 | ||
105 | if (!tb[IFLA_MACVLAN_MODE] || | |
106 | RTA_PAYLOAD(tb[IFLA_MACVLAN_MODE]) < sizeof(__u32)) | |
107 | return; | |
108 | ||
7dc0481a | 109 | mode = rta_getattr_u32(tb[IFLA_MACVLAN_MODE]); |
d63a9b2b AB |
110 | fprintf(f, " mode %s ", |
111 | mode == MACVLAN_MODE_PRIVATE ? "private" | |
112 | : mode == MACVLAN_MODE_VEPA ? "vepa" | |
113 | : mode == MACVLAN_MODE_BRIDGE ? "bridge" | |
f0612d56 | 114 | : mode == MACVLAN_MODE_PASSTHRU ? "passthru" |
d63a9b2b | 115 | : "unknown"); |
3cf8ba59 PS |
116 | |
117 | if (!tb[IFLA_MACVLAN_FLAGS] || | |
118 | RTA_PAYLOAD(tb[IFLA_MACVLAN_FLAGS]) < sizeof(__u16)) | |
119 | return; | |
120 | ||
121 | flags = rta_getattr_u16(tb[IFLA_MACVLAN_FLAGS]); | |
122 | if (flags & MACVLAN_FLAG_NOPROMISC) | |
123 | fprintf(f, "nopromisc "); | |
d63a9b2b AB |
124 | } |
125 | ||
561e650e | 126 | static void macvlan_print_help(struct link_util *lu, int argc, char **argv, |
127 | FILE *f) | |
128 | { | |
541f1b3e | 129 | print_explain(lu, f); |
561e650e | 130 | } |
131 | ||
d63a9b2b AB |
132 | struct link_util macvlan_link_util = { |
133 | .id = "macvlan", | |
134 | .maxattr = IFLA_MACVLAN_MAX, | |
135 | .parse_opt = macvlan_parse_opt, | |
136 | .print_opt = macvlan_print_opt, | |
561e650e | 137 | .print_help = macvlan_print_help, |
d63a9b2b | 138 | }; |
541f1b3e PS |
139 | |
140 | struct link_util macvtap_link_util = { | |
141 | .id = "macvtap", | |
142 | .maxattr = IFLA_MACVLAN_MAX, | |
143 | .parse_opt = macvlan_parse_opt, | |
144 | .print_opt = macvlan_print_opt, | |
145 | .print_help = macvlan_print_help, | |
146 | }; |