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561e650eff
Allow to print particular link type usage by:
ip link help [TYPE]
Currently to print usage for some link type it is needed
to use the following way:
ip link { add | del | set } type TYPE help
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
106 lines
2.4 KiB
C
106 lines
2.4 KiB
C
/*
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* iplink_macvtap.c macvtap device support
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <linux/if_link.h>
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#include "rt_names.h"
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#include "utils.h"
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#include "ip_common.h"
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static void print_explain(FILE *f)
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{
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fprintf(stderr,
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"Usage: ... macvtap mode { private | vepa | bridge | passthru }\n"
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);
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}
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static void explain(void)
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{
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print_explain(stderr);
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}
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static int mode_arg(const char *arg)
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{
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fprintf(stderr, "Error: argument of \"mode\" must be \"private\", "
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"\"vepa\", \"bridge\" or \"passthru\", not \"%s\"\n", arg);
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return -1;
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}
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static int macvtap_parse_opt(struct link_util *lu, int argc, char **argv,
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struct nlmsghdr *n)
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{
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while (argc > 0) {
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if (matches(*argv, "mode") == 0) {
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__u32 mode = 0;
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NEXT_ARG();
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if (strcmp(*argv, "private") == 0)
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mode = MACVLAN_MODE_PRIVATE;
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else if (strcmp(*argv, "vepa") == 0)
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mode = MACVLAN_MODE_VEPA;
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else if (strcmp(*argv, "bridge") == 0)
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mode = MACVLAN_MODE_BRIDGE;
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else if (strcmp(*argv, "passthru") == 0)
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mode = MACVLAN_MODE_PASSTHRU;
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else
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return mode_arg(*argv);
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addattr32(n, 1024, IFLA_MACVLAN_MODE, mode);
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} else if (matches(*argv, "help") == 0) {
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explain();
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return -1;
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} else {
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fprintf(stderr, "macvtap: unknown command \"%s\"?\n", *argv);
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explain();
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return -1;
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}
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argc--, argv++;
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}
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return 0;
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}
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static void macvtap_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
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{
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__u32 mode;
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if (!tb)
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return;
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if (!tb[IFLA_MACVLAN_MODE] ||
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RTA_PAYLOAD(tb[IFLA_MACVLAN_MODE]) < sizeof(__u32))
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return;
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mode = rta_getattr_u32(tb[IFLA_VLAN_ID]);
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fprintf(f, " mode %s ",
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mode == MACVLAN_MODE_PRIVATE ? "private"
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: mode == MACVLAN_MODE_VEPA ? "vepa"
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: mode == MACVLAN_MODE_BRIDGE ? "bridge"
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: mode == MACVLAN_MODE_PASSTHRU ? "passthru"
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: "unknown");
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}
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static void macvtap_print_help(struct link_util *lu, int argc, char **argv,
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FILE *f)
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{
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print_explain(f);
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}
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struct link_util macvtap_link_util = {
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.id = "macvtap",
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.maxattr = IFLA_MACVLAN_MAX,
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.parse_opt = macvtap_parse_opt,
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.print_opt = macvtap_print_opt,
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.print_help = macvtap_print_help,
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};
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