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1891754487
Flags for a peer override flags for the other and not used for the
peer.
before:
# ip link add up type veth peer down multicast off
# ip link
1: lo: <LOOPBACK> mtu 65536 qdisc noop state DOWN mode DEFAULT group default
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: veth0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
link/ether 2e:5c:cd:f5:63:d2 brd ff:ff:ff:ff:ff:ff
3: veth1: <BROADCAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
link/ether 72:b0:fa:1e:76:7a brd ff:ff:ff:ff:ff:ff
after:
# ip link add up type veth peer down multicast off
# ip link
1: lo: <LOOPBACK> mtu 65536 qdisc noop state DOWN mode DEFAULT group default
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: veth0: <BROADCAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
link/ether 6e:db:03:b3:bd:ff brd ff:ff:ff:ff:ff:ff
3: veth1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN mode DEFAULT group default qlen 1000
link/ether a6:62:d9:84:f0:73 brd ff:ff:ff:ff:ff:ff
Signed-off-by: Kusanagi Kouichi <slash@ac.auone-net.jp>
86 lines
1.9 KiB
C
86 lines
1.9 KiB
C
/*
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* link_veth.c veth driver module
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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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* Authors: Pavel Emelianov <xemul@openvz.org>
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*
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*/
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#include <string.h>
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#include <net/if.h>
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#include <linux/veth.h>
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#include "utils.h"
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#include "ip_common.h"
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static void usage(void)
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{
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printf("Usage: ip link <options> type veth [peer <options>]\n"
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"To get <options> type 'ip link add help'\n");
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}
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static int veth_parse_opt(struct link_util *lu, int argc, char **argv,
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struct nlmsghdr *hdr)
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{
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char *dev = NULL;
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char *name = NULL;
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char *link = NULL;
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char *type = NULL;
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int index = 0;
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int err, len;
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struct rtattr * data;
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int group;
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struct ifinfomsg *ifm, *peer_ifm;
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unsigned int ifi_flags, ifi_change;
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if (strcmp(argv[0], "peer") != 0) {
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usage();
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return -1;
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}
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ifm = NLMSG_DATA(hdr);
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ifi_flags = ifm->ifi_flags;
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ifi_change = ifm->ifi_change;
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ifm->ifi_flags = 0;
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ifm->ifi_change = 0;
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data = NLMSG_TAIL(hdr);
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addattr_l(hdr, 1024, VETH_INFO_PEER, NULL, 0);
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hdr->nlmsg_len += sizeof(struct ifinfomsg);
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err = iplink_parse(argc - 1, argv + 1, (struct iplink_req *)hdr,
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&name, &type, &link, &dev, &group, &index);
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if (err < 0)
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return err;
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if (name) {
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len = strlen(name) + 1;
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if (len > IFNAMSIZ)
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invarg("\"name\" too long\n", *argv);
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addattr_l(hdr, 1024, IFLA_IFNAME, name, len);
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}
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peer_ifm = RTA_DATA(data);
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peer_ifm->ifi_index = index;
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peer_ifm->ifi_flags = ifm->ifi_flags;
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peer_ifm->ifi_change = ifm->ifi_change;
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ifm->ifi_flags = ifi_flags;
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ifm->ifi_change = ifi_change;
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if (group != -1)
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addattr32(hdr, 1024, IFLA_GROUP, group);
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data->rta_len = (void *)NLMSG_TAIL(hdr) - (void *)data;
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return argc - 1 - err;
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}
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struct link_util veth_link_util = {
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.id = "veth",
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.parse_opt = veth_parse_opt,
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};
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