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.
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
19 #include <sys/socket.h>
21 #include <linux/if_packet.h>
22 #include <linux/if_ether.h>
23 #include <linux/sockios.h>
24 #include <netinet/in.h>
25 #include <arpa/inet.h>
27 #include <sys/ioctl.h>
29 #include <linux/mpls.h>
33 #include "ip_common.h"
34 #include "namespace.h"
36 #define IPLINK_IOCTL_COMPAT 1
38 #define LIBDIR "/usr/lib"
42 #define GSO_MAX_SIZE 65536
45 #define GSO_MAX_SEGS 65535
49 static void usage(void) __attribute__((noreturn
));
50 static int iplink_have_newlink(void);
52 void iplink_usage(void)
54 if (iplink_have_newlink()) {
56 "Usage: ip link add [link DEV] [ name ] NAME\n"
57 " [ txqueuelen PACKETS ]\n"
58 " [ address LLADDR ]\n"
59 " [ broadcast LLADDR ]\n"
60 " [ mtu MTU ] [index IDX ]\n"
61 " [ numtxqueues QUEUE_COUNT ]\n"
62 " [ numrxqueues QUEUE_COUNT ]\n"
63 " type TYPE [ ARGS ]\n"
65 " ip link delete { DEVICE | dev DEVICE | group DEVGROUP } type TYPE [ ARGS ]\n"
67 " ip link set { DEVICE | dev DEVICE | group DEVGROUP }\n"
68 " [ { up | down } ]\n"
69 " [ type TYPE ARGS ]\n");
72 "Usage: ip link set DEVICE [ { up | down } ]\n");
75 " [ arp { on | off } ]\n"
76 " [ dynamic { on | off } ]\n"
77 " [ multicast { on | off } ]\n"
78 " [ allmulticast { on | off } ]\n"
79 " [ promisc { on | off } ]\n"
80 " [ trailers { on | off } ]\n"
81 " [ carrier { on | off } ]\n"
82 " [ txqueuelen PACKETS ]\n"
84 " [ address LLADDR ]\n"
85 " [ broadcast LLADDR ]\n"
87 " [ netns { PID | NAME } ]\n"
88 " [ link-netns NAME | link-netnsid ID ]\n"
90 " [ vf NUM [ mac LLADDR ]\n"
91 " [ vlan VLANID [ qos VLAN-QOS ] [ proto VLAN-PROTO ] ]\n"
93 " [ max_tx_rate TXRATE ]\n"
94 " [ min_tx_rate TXRATE ]\n"
95 " [ spoofchk { on | off} ]\n"
96 " [ query_rss { on | off} ]\n"
97 " [ state { auto | enable | disable} ] ]\n"
98 " [ trust { on | off} ] ]\n"
99 " [ node_guid { eui64 } ]\n"
100 " [ port_guid { eui64 } ]\n"
101 " [ { xdp | xdpgeneric | xdpdrv | xdpoffload } { off |\n"
102 " object FILE [ section NAME ] [ verbose ] |\n"
104 " [ master DEVICE ][ vrf NAME ]\n"
106 " [ addrgenmode { eui64 | none | stable_secret | random } ]\n"
107 " [ protodown { on | off } ]\n"
108 " [ gso_max_size BYTES ] | [ gso_max_segs PACKETS ]\n"
110 " ip link show [ DEVICE | group GROUP ] [up] [master DEV] [vrf NAME] [type TYPE]\n");
112 fprintf(stderr
, "\n ip link xstats type TYPE [ ARGS ]\n");
113 fprintf(stderr
, "\n ip link afstats [ dev DEVICE ]\n");
115 if (iplink_have_newlink()) {
118 " ip link help [ TYPE ]\n"
120 "TYPE := { vlan | veth | vcan | vxcan | dummy | ifb | macvlan | macvtap |\n"
121 " bridge | bond | team | ipoib | ip6tnl | ipip | sit | vxlan |\n"
122 " gre | gretap | erspan | ip6gre | ip6gretap | ip6erspan |\n"
123 " vti | nlmon | team_slave | bond_slave | bridge_slave |\n"
124 " ipvlan | ipvtap | geneve | vrf | macsec | netdevsim | rmnet }\n");
129 static void usage(void)
134 static int on_off(const char *msg
, const char *realval
)
137 "Error: argument of \"%s\" must be \"on\" or \"off\", not \"%s\"\n",
142 static void *BODY
; /* cached dlopen(NULL) handle */
143 static struct link_util
*linkutil_list
;
145 struct link_util
*get_link_kind(const char *id
)
151 for (l
= linkutil_list
; l
; l
= l
->next
)
152 if (strcmp(l
->id
, id
) == 0)
155 snprintf(buf
, sizeof(buf
), LIBDIR
"/ip/link_%s.so", id
);
156 dlh
= dlopen(buf
, RTLD_LAZY
);
158 /* look in current binary, only open once */
161 dlh
= BODY
= dlopen(NULL
, RTLD_LAZY
);
167 snprintf(buf
, sizeof(buf
), "%s_link_util", id
);
172 l
->next
= linkutil_list
;
177 static int get_link_mode(const char *mode
)
179 if (strcasecmp(mode
, "default") == 0)
180 return IF_LINK_MODE_DEFAULT
;
181 if (strcasecmp(mode
, "dormant") == 0)
182 return IF_LINK_MODE_DORMANT
;
186 static int get_addr_gen_mode(const char *mode
)
188 if (strcasecmp(mode
, "eui64") == 0)
189 return IN6_ADDR_GEN_MODE_EUI64
;
190 if (strcasecmp(mode
, "none") == 0)
191 return IN6_ADDR_GEN_MODE_NONE
;
192 if (strcasecmp(mode
, "stable_secret") == 0)
193 return IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
194 if (strcasecmp(mode
, "random") == 0)
195 return IN6_ADDR_GEN_MODE_RANDOM
;
199 #if IPLINK_IOCTL_COMPAT
200 static int have_rtnl_newlink
= -1;
202 static int accept_msg(struct rtnl_ctrl_data
*ctrl
,
203 struct nlmsghdr
*n
, void *arg
)
205 struct nlmsgerr
*err
= (struct nlmsgerr
*)NLMSG_DATA(n
);
207 if (n
->nlmsg_type
== NLMSG_ERROR
&&
208 (err
->error
== -EOPNOTSUPP
|| err
->error
== -EINVAL
))
209 have_rtnl_newlink
= 0;
211 have_rtnl_newlink
= 1;
215 static int iplink_have_newlink(void)
222 .n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct ifinfomsg
)),
223 .n
.nlmsg_flags
= NLM_F_REQUEST
| NLM_F_ACK
,
224 .n
.nlmsg_type
= RTM_NEWLINK
,
225 .i
.ifi_family
= AF_UNSPEC
,
228 if (have_rtnl_newlink
< 0) {
229 if (rtnl_send(&rth
, &req
.n
, req
.n
.nlmsg_len
) < 0) {
230 perror("request send failed");
233 rtnl_listen(&rth
, accept_msg
, NULL
);
235 return have_rtnl_newlink
;
237 #else /* IPLINK_IOCTL_COMPAT */
238 static int iplink_have_newlink(void)
242 #endif /* ! IPLINK_IOCTL_COMPAT */
244 static int nl_get_ll_addr_len(const char *ifname
)
247 int dev_index
= ll_name_to_index(ifname
);
248 struct iplink_req req
= {
250 .nlmsg_len
= NLMSG_LENGTH(sizeof(struct ifinfomsg
)),
251 .nlmsg_type
= RTM_GETLINK
,
252 .nlmsg_flags
= NLM_F_REQUEST
255 .ifi_family
= preferred_family
,
256 .ifi_index
= dev_index
,
259 struct nlmsghdr
*answer
;
260 struct rtattr
*tb
[IFLA_MAX
+1];
265 if (rtnl_talk(&rth
, &req
.n
, &answer
) < 0)
268 len
= answer
->nlmsg_len
- NLMSG_LENGTH(sizeof(struct ifinfomsg
));
274 parse_rtattr_flags(tb
, IFLA_MAX
, IFLA_RTA(NLMSG_DATA(answer
)),
276 if (!tb
[IFLA_ADDRESS
]) {
281 len
= RTA_PAYLOAD(tb
[IFLA_ADDRESS
]);
286 static void iplink_parse_vf_vlan_info(int vf
, int *argcp
, char ***argvp
,
287 struct ifla_vf_vlan_info
*ivvip
)
290 char **argv
= *argvp
;
294 if (get_unsigned(&vci
, *argv
, 0) || vci
> 4095)
295 invarg("Invalid \"vlan\" value\n", *argv
);
300 ivvip
->vlan_proto
= htons(ETH_P_8021Q
);
303 if (matches(*argv
, "qos") == 0) {
305 if (get_unsigned(&ivvip
->qos
, *argv
, 0))
306 invarg("Invalid \"qos\" value\n", *argv
);
314 if (matches(*argv
, "proto") == 0) {
316 if (ll_proto_a2n(&ivvip
->vlan_proto
, *argv
))
317 invarg("protocol is invalid\n", *argv
);
318 if (ivvip
->vlan_proto
!= htons(ETH_P_8021AD
) &&
319 ivvip
->vlan_proto
!= htons(ETH_P_8021Q
)) {
322 char msg
[64 + sizeof(b1
) + sizeof(b2
)];
325 "Invalid \"vlan protocol\" value - supported %s, %s\n",
326 ll_proto_n2a(htons(ETH_P_8021Q
),
328 ll_proto_n2a(htons(ETH_P_8021AD
),
342 static int iplink_parse_vf(int vf
, int *argcp
, char ***argvp
,
343 struct iplink_req
*req
, const char *dev
)
345 char new_rate_api
= 0, count
= 0, override_legacy_rate
= 0;
346 struct ifla_vf_rate tivt
;
347 int len
, argc
= *argcp
;
348 char **argv
= *argvp
;
349 struct rtattr
*vfinfo
;
351 tivt
.min_tx_rate
= -1;
352 tivt
.max_tx_rate
= -1;
354 vfinfo
= addattr_nest(&req
->n
, sizeof(*req
), IFLA_VF_INFO
);
356 while (NEXT_ARG_OK()) {
359 if (!matches(*argv
, "max_tx_rate")) {
362 /* override legacy rate */
363 override_legacy_rate
= 1;
364 } else if (!matches(*argv
, "min_tx_rate")) {
375 while (NEXT_ARG_OK()) {
377 if (matches(*argv
, "mac") == 0) {
378 struct ifla_vf_mac ivm
= { 0 };
379 int halen
= nl_get_ll_addr_len(dev
);
383 len
= ll_addr_a2n((char *)ivm
.mac
, 32, *argv
);
386 if (halen
> 0 && len
!= halen
) {
388 "Invalid address length %d - must be %d bytes\n",
392 addattr_l(&req
->n
, sizeof(*req
), IFLA_VF_MAC
,
394 } else if (matches(*argv
, "vlan") == 0) {
395 struct ifla_vf_vlan_info ivvi
;
397 iplink_parse_vf_vlan_info(vf
, &argc
, &argv
, &ivvi
);
398 /* support the old interface in case of older kernel*/
399 if (ivvi
.vlan_proto
== htons(ETH_P_8021Q
)) {
400 struct ifla_vf_vlan ivv
;
403 ivv
.vlan
= ivvi
.vlan
;
405 addattr_l(&req
->n
, sizeof(*req
),
406 IFLA_VF_VLAN
, &ivv
, sizeof(ivv
));
408 struct rtattr
*vfvlanlist
;
410 vfvlanlist
= addattr_nest(&req
->n
, sizeof(*req
),
412 addattr_l(&req
->n
, sizeof(*req
),
413 IFLA_VF_VLAN_INFO
, &ivvi
,
416 while (NEXT_ARG_OK()) {
418 if (matches(*argv
, "vlan") != 0) {
422 iplink_parse_vf_vlan_info(vf
, &argc
,
424 addattr_l(&req
->n
, sizeof(*req
),
425 IFLA_VF_VLAN_INFO
, &ivvi
,
428 addattr_nest_end(&req
->n
, vfvlanlist
);
430 } else if (matches(*argv
, "rate") == 0) {
431 struct ifla_vf_tx_rate ivt
;
434 if (get_unsigned(&ivt
.rate
, *argv
, 0))
435 invarg("Invalid \"rate\" value\n", *argv
);
439 addattr_l(&req
->n
, sizeof(*req
),
440 IFLA_VF_TX_RATE
, &ivt
, sizeof(ivt
));
441 else if (!override_legacy_rate
)
442 tivt
.max_tx_rate
= ivt
.rate
;
444 } else if (matches(*argv
, "max_tx_rate") == 0) {
446 if (get_unsigned(&tivt
.max_tx_rate
, *argv
, 0))
447 invarg("Invalid \"max tx rate\" value\n",
451 } else if (matches(*argv
, "min_tx_rate") == 0) {
453 if (get_unsigned(&tivt
.min_tx_rate
, *argv
, 0))
454 invarg("Invalid \"min tx rate\" value\n",
458 } else if (matches(*argv
, "spoofchk") == 0) {
459 struct ifla_vf_spoofchk ivs
;
462 if (matches(*argv
, "on") == 0)
464 else if (matches(*argv
, "off") == 0)
467 return on_off("spoofchk", *argv
);
469 addattr_l(&req
->n
, sizeof(*req
), IFLA_VF_SPOOFCHK
,
472 } else if (matches(*argv
, "query_rss") == 0) {
473 struct ifla_vf_rss_query_en ivs
;
476 if (matches(*argv
, "on") == 0)
478 else if (matches(*argv
, "off") == 0)
481 return on_off("query_rss", *argv
);
483 addattr_l(&req
->n
, sizeof(*req
), IFLA_VF_RSS_QUERY_EN
,
486 } else if (matches(*argv
, "trust") == 0) {
487 struct ifla_vf_trust ivt
;
490 if (matches(*argv
, "on") == 0)
492 else if (matches(*argv
, "off") == 0)
495 invarg("Invalid \"trust\" value\n", *argv
);
497 addattr_l(&req
->n
, sizeof(*req
), IFLA_VF_TRUST
,
500 } else if (matches(*argv
, "state") == 0) {
501 struct ifla_vf_link_state ivl
;
504 if (matches(*argv
, "auto") == 0)
505 ivl
.link_state
= IFLA_VF_LINK_STATE_AUTO
;
506 else if (matches(*argv
, "enable") == 0)
507 ivl
.link_state
= IFLA_VF_LINK_STATE_ENABLE
;
508 else if (matches(*argv
, "disable") == 0)
509 ivl
.link_state
= IFLA_VF_LINK_STATE_DISABLE
;
511 invarg("Invalid \"state\" value\n", *argv
);
513 addattr_l(&req
->n
, sizeof(*req
), IFLA_VF_LINK_STATE
,
515 } else if (matches(*argv
, "node_guid") == 0) {
516 struct ifla_vf_guid ivg
;
520 if (get_guid(&ivg
.guid
, *argv
)) {
521 invarg("Invalid GUID format\n", *argv
);
524 addattr_l(&req
->n
, sizeof(*req
), IFLA_VF_IB_NODE_GUID
,
526 } else if (matches(*argv
, "port_guid") == 0) {
527 struct ifla_vf_guid ivg
;
531 if (get_guid(&ivg
.guid
, *argv
)) {
532 invarg("Invalid GUID format\n", *argv
);
535 addattr_l(&req
->n
, sizeof(*req
), IFLA_VF_IB_PORT_GUID
,
547 if (tivt
.min_tx_rate
== -1 || tivt
.max_tx_rate
== -1) {
548 ipaddr_get_vf_rate(tivt
.vf
, &tmin
, &tmax
, dev
);
549 if (tivt
.min_tx_rate
== -1)
550 tivt
.min_tx_rate
= tmin
;
551 if (tivt
.max_tx_rate
== -1)
552 tivt
.max_tx_rate
= tmax
;
555 if (tivt
.max_tx_rate
&& tivt
.min_tx_rate
> tivt
.max_tx_rate
) {
557 "Invalid min_tx_rate %d - must be <= max_tx_rate %d\n",
558 tivt
.min_tx_rate
, tivt
.max_tx_rate
);
562 addattr_l(&req
->n
, sizeof(*req
), IFLA_VF_RATE
, &tivt
,
567 incomplete_command();
569 addattr_nest_end(&req
->n
, vfinfo
);
576 int iplink_parse(int argc
, char **argv
, struct iplink_req
*req
, char **type
)
587 int numtxqueues
= -1;
588 int numrxqueues
= -1;
589 int link_netnsid
= -1;
597 if (strcmp(*argv
, "up") == 0) {
598 req
->i
.ifi_change
|= IFF_UP
;
599 req
->i
.ifi_flags
|= IFF_UP
;
600 } else if (strcmp(*argv
, "down") == 0) {
601 req
->i
.ifi_change
|= IFF_UP
;
602 req
->i
.ifi_flags
&= ~IFF_UP
;
603 } else if (strcmp(*argv
, "name") == 0) {
606 duparg("name", *argv
);
607 if (check_ifname(*argv
))
608 invarg("\"name\" not a valid ifname", *argv
);
612 } else if (strcmp(*argv
, "index") == 0) {
615 duparg("index", *argv
);
618 invarg("Invalid \"index\" value", *argv
);
619 } else if (matches(*argv
, "link") == 0) {
622 } else if (matches(*argv
, "address") == 0) {
624 addr_len
= ll_addr_a2n(abuf
, sizeof(abuf
), *argv
);
627 addattr_l(&req
->n
, sizeof(*req
),
628 IFLA_ADDRESS
, abuf
, addr_len
);
629 } else if (matches(*argv
, "broadcast") == 0 ||
630 strcmp(*argv
, "brd") == 0) {
632 len
= ll_addr_a2n(abuf
, sizeof(abuf
), *argv
);
635 addattr_l(&req
->n
, sizeof(*req
),
636 IFLA_BROADCAST
, abuf
, len
);
637 } else if (matches(*argv
, "txqueuelen") == 0 ||
638 strcmp(*argv
, "qlen") == 0 ||
639 matches(*argv
, "txqlen") == 0) {
642 duparg("txqueuelen", *argv
);
643 if (get_integer(&qlen
, *argv
, 0))
644 invarg("Invalid \"txqueuelen\" value\n", *argv
);
645 addattr_l(&req
->n
, sizeof(*req
),
646 IFLA_TXQLEN
, &qlen
, 4);
647 } else if (strcmp(*argv
, "mtu") == 0) {
650 duparg("mtu", *argv
);
651 if (get_integer(&mtu
, *argv
, 0))
652 invarg("Invalid \"mtu\" value\n", *argv
);
653 addattr_l(&req
->n
, sizeof(*req
), IFLA_MTU
, &mtu
, 4);
654 } else if (strcmp(*argv
, "xdpgeneric") == 0 ||
655 strcmp(*argv
, "xdpdrv") == 0 ||
656 strcmp(*argv
, "xdpoffload") == 0 ||
657 strcmp(*argv
, "xdp") == 0) {
658 bool generic
= strcmp(*argv
, "xdpgeneric") == 0;
659 bool drv
= strcmp(*argv
, "xdpdrv") == 0;
660 bool offload
= strcmp(*argv
, "xdpoffload") == 0;
663 if (xdp_parse(&argc
, &argv
, req
, dev
,
664 generic
, drv
, offload
))
667 if (offload
&& name
== dev
)
669 } else if (strcmp(*argv
, "netns") == 0) {
672 duparg("netns", *argv
);
673 netns
= netns_get_fd(*argv
);
675 addattr_l(&req
->n
, sizeof(*req
), IFLA_NET_NS_FD
,
677 else if (get_integer(&netns
, *argv
, 0) == 0)
678 addattr_l(&req
->n
, sizeof(*req
),
679 IFLA_NET_NS_PID
, &netns
, 4);
681 invarg("Invalid \"netns\" value\n", *argv
);
682 } else if (strcmp(*argv
, "multicast") == 0) {
684 req
->i
.ifi_change
|= IFF_MULTICAST
;
686 if (strcmp(*argv
, "on") == 0)
687 req
->i
.ifi_flags
|= IFF_MULTICAST
;
688 else if (strcmp(*argv
, "off") == 0)
689 req
->i
.ifi_flags
&= ~IFF_MULTICAST
;
691 return on_off("multicast", *argv
);
692 } else if (strcmp(*argv
, "allmulticast") == 0) {
694 req
->i
.ifi_change
|= IFF_ALLMULTI
;
696 if (strcmp(*argv
, "on") == 0)
697 req
->i
.ifi_flags
|= IFF_ALLMULTI
;
698 else if (strcmp(*argv
, "off") == 0)
699 req
->i
.ifi_flags
&= ~IFF_ALLMULTI
;
701 return on_off("allmulticast", *argv
);
702 } else if (strcmp(*argv
, "promisc") == 0) {
704 req
->i
.ifi_change
|= IFF_PROMISC
;
706 if (strcmp(*argv
, "on") == 0)
707 req
->i
.ifi_flags
|= IFF_PROMISC
;
708 else if (strcmp(*argv
, "off") == 0)
709 req
->i
.ifi_flags
&= ~IFF_PROMISC
;
711 return on_off("promisc", *argv
);
712 } else if (strcmp(*argv
, "trailers") == 0) {
714 req
->i
.ifi_change
|= IFF_NOTRAILERS
;
716 if (strcmp(*argv
, "off") == 0)
717 req
->i
.ifi_flags
|= IFF_NOTRAILERS
;
718 else if (strcmp(*argv
, "on") == 0)
719 req
->i
.ifi_flags
&= ~IFF_NOTRAILERS
;
721 return on_off("trailers", *argv
);
722 } else if (strcmp(*argv
, "arp") == 0) {
724 req
->i
.ifi_change
|= IFF_NOARP
;
726 if (strcmp(*argv
, "on") == 0)
727 req
->i
.ifi_flags
&= ~IFF_NOARP
;
728 else if (strcmp(*argv
, "off") == 0)
729 req
->i
.ifi_flags
|= IFF_NOARP
;
731 return on_off("arp", *argv
);
732 } else if (strcmp(*argv
, "carrier") == 0) {
736 if (strcmp(*argv
, "on") == 0)
738 else if (strcmp(*argv
, "off") == 0)
741 return on_off("carrier", *argv
);
743 addattr8(&req
->n
, sizeof(*req
), IFLA_CARRIER
, carrier
);
744 } else if (strcmp(*argv
, "vf") == 0) {
745 struct rtattr
*vflist
;
748 if (get_integer(&vf
, *argv
, 0))
749 invarg("Invalid \"vf\" value\n", *argv
);
751 vflist
= addattr_nest(&req
->n
, sizeof(*req
),
756 len
= iplink_parse_vf(vf
, &argc
, &argv
, req
, dev
);
759 addattr_nest_end(&req
->n
, vflist
);
763 } else if (matches(*argv
, "master") == 0) {
767 ifindex
= ll_name_to_index(*argv
);
769 invarg("Device does not exist\n", *argv
);
770 addattr_l(&req
->n
, sizeof(*req
), IFLA_MASTER
,
772 } else if (strcmp(*argv
, "vrf") == 0) {
776 ifindex
= ll_name_to_index(*argv
);
778 invarg("Not a valid VRF name\n", *argv
);
779 if (!name_is_vrf(*argv
))
780 invarg("Not a valid VRF name\n", *argv
);
781 addattr_l(&req
->n
, sizeof(*req
), IFLA_MASTER
,
782 &ifindex
, sizeof(ifindex
));
783 } else if (matches(*argv
, "nomaster") == 0) {
786 addattr_l(&req
->n
, sizeof(*req
), IFLA_MASTER
,
788 } else if (matches(*argv
, "dynamic") == 0) {
790 req
->i
.ifi_change
|= IFF_DYNAMIC
;
792 if (strcmp(*argv
, "on") == 0)
793 req
->i
.ifi_flags
|= IFF_DYNAMIC
;
794 else if (strcmp(*argv
, "off") == 0)
795 req
->i
.ifi_flags
&= ~IFF_DYNAMIC
;
797 return on_off("dynamic", *argv
);
798 } else if (matches(*argv
, "type") == 0) {
803 } else if (matches(*argv
, "alias") == 0) {
807 invarg("alias too long\n", *argv
);
808 addattr_l(&req
->n
, sizeof(*req
), IFLA_IFALIAS
,
810 } else if (strcmp(*argv
, "group") == 0) {
813 duparg("group", *argv
);
814 if (rtnl_group_a2n(&group
, *argv
))
815 invarg("Invalid \"group\" value\n", *argv
);
816 addattr32(&req
->n
, sizeof(*req
), IFLA_GROUP
, group
);
817 } else if (strcmp(*argv
, "mode") == 0) {
821 mode
= get_link_mode(*argv
);
823 invarg("Invalid link mode\n", *argv
);
824 addattr8(&req
->n
, sizeof(*req
), IFLA_LINKMODE
, mode
);
825 } else if (strcmp(*argv
, "state") == 0) {
829 state
= get_operstate(*argv
);
831 invarg("Invalid operstate\n", *argv
);
833 addattr8(&req
->n
, sizeof(*req
), IFLA_OPERSTATE
, state
);
834 } else if (matches(*argv
, "numtxqueues") == 0) {
836 if (numtxqueues
!= -1)
837 duparg("numtxqueues", *argv
);
838 if (get_integer(&numtxqueues
, *argv
, 0))
839 invarg("Invalid \"numtxqueues\" value\n",
841 addattr_l(&req
->n
, sizeof(*req
), IFLA_NUM_TX_QUEUES
,
843 } else if (matches(*argv
, "numrxqueues") == 0) {
845 if (numrxqueues
!= -1)
846 duparg("numrxqueues", *argv
);
847 if (get_integer(&numrxqueues
, *argv
, 0))
848 invarg("Invalid \"numrxqueues\" value\n",
850 addattr_l(&req
->n
, sizeof(*req
), IFLA_NUM_RX_QUEUES
,
852 } else if (matches(*argv
, "addrgenmode") == 0) {
853 struct rtattr
*afs
, *afs6
;
857 mode
= get_addr_gen_mode(*argv
);
859 invarg("Invalid address generation mode\n",
861 afs
= addattr_nest(&req
->n
, sizeof(*req
), IFLA_AF_SPEC
);
862 afs6
= addattr_nest(&req
->n
, sizeof(*req
), AF_INET6
);
863 addattr8(&req
->n
, sizeof(*req
),
864 IFLA_INET6_ADDR_GEN_MODE
, mode
);
865 addattr_nest_end(&req
->n
, afs6
);
866 addattr_nest_end(&req
->n
, afs
);
867 } else if (matches(*argv
, "link-netns") == 0) {
869 if (link_netnsid
!= -1)
870 duparg("link-netns/link-netnsid", *argv
);
871 link_netnsid
= get_netnsid_from_name(*argv
);
872 /* No nsid? Try to assign one. */
873 if (link_netnsid
< 0)
874 set_netnsid_from_name(*argv
, -1);
875 link_netnsid
= get_netnsid_from_name(*argv
);
876 if (link_netnsid
< 0)
877 invarg("Invalid \"link-netns\" value\n",
879 addattr32(&req
->n
, sizeof(*req
), IFLA_LINK_NETNSID
,
881 } else if (matches(*argv
, "link-netnsid") == 0) {
883 if (link_netnsid
!= -1)
884 duparg("link-netns/link-netnsid", *argv
);
885 if (get_integer(&link_netnsid
, *argv
, 0))
886 invarg("Invalid \"link-netnsid\" value\n",
888 addattr32(&req
->n
, sizeof(*req
), IFLA_LINK_NETNSID
,
890 } else if (strcmp(*argv
, "protodown") == 0) {
891 unsigned int proto_down
;
894 if (strcmp(*argv
, "on") == 0)
896 else if (strcmp(*argv
, "off") == 0)
899 return on_off("protodown", *argv
);
900 addattr8(&req
->n
, sizeof(*req
), IFLA_PROTO_DOWN
,
902 } else if (strcmp(*argv
, "gso_max_size") == 0) {
903 unsigned int max_size
;
906 if (get_unsigned(&max_size
, *argv
, 0) ||
907 max_size
> GSO_MAX_SIZE
)
908 invarg("Invalid \"gso_max_size\" value\n",
910 addattr32(&req
->n
, sizeof(*req
),
911 IFLA_GSO_MAX_SIZE
, max_size
);
912 } else if (strcmp(*argv
, "gso_max_segs") == 0) {
913 unsigned int max_segs
;
916 if (get_unsigned(&max_segs
, *argv
, 0) ||
917 max_segs
> GSO_MAX_SEGS
)
918 invarg("Invalid \"gso_max_segs\" value\n",
920 addattr32(&req
->n
, sizeof(*req
),
921 IFLA_GSO_MAX_SEGS
, max_segs
);
923 if (matches(*argv
, "help") == 0)
926 if (strcmp(*argv
, "dev") == 0)
929 duparg2("dev", *argv
);
930 if (check_ifname(*argv
))
931 invarg("\"dev\" not a valid ifname", *argv
);
939 /* Allow "ip link add dev" and "ip link add name" */
944 else if (!strcmp(name
, dev
))
947 if (dev
&& addr_len
) {
948 int halen
= nl_get_ll_addr_len(dev
);
950 if (halen
>= 0 && halen
!= addr_len
) {
952 "Invalid address length %d - must be %d bytes\n",
958 if (!(req
->n
.nlmsg_flags
& NLM_F_CREATE
) && index
) {
960 "index can be used only when creating devices.\n");
968 "Garbage instead of arguments \"%s ...\". Try \"ip link help\".\n",
972 if (req
->n
.nlmsg_flags
& NLM_F_CREATE
) {
974 "group cannot be used when creating devices.\n");
983 if (!(req
->n
.nlmsg_flags
& NLM_F_CREATE
)) {
986 "Not enough information: \"dev\" argument is required.\n");
990 req
->i
.ifi_index
= ll_name_to_index(dev
);
991 if (!req
->i
.ifi_index
)
994 /* Not renaming to the same name */
1000 "both \"name\" and \"dev\" cannot be used when creating devices.\n");
1007 ifindex
= ll_name_to_index(link
);
1010 addattr32(&req
->n
, sizeof(*req
), IFLA_LINK
, ifindex
);
1013 req
->i
.ifi_index
= index
;
1017 addattr_l(&req
->n
, sizeof(*req
),
1018 IFLA_IFNAME
, name
, strlen(name
) + 1);
1024 static int iplink_modify(int cmd
, unsigned int flags
, int argc
, char **argv
)
1027 struct iplink_req req
= {
1028 .n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct ifinfomsg
)),
1029 .n
.nlmsg_flags
= NLM_F_REQUEST
| flags
,
1030 .n
.nlmsg_type
= cmd
,
1031 .i
.ifi_family
= preferred_family
,
1035 ret
= iplink_parse(argc
, argv
, &req
, &type
);
1040 struct link_util
*lu
;
1041 struct rtattr
*linkinfo
;
1042 char *ulinep
= strchr(type
, '_');
1045 linkinfo
= addattr_nest(&req
.n
, sizeof(req
), IFLA_LINKINFO
);
1046 addattr_l(&req
.n
, sizeof(req
), IFLA_INFO_KIND
, type
,
1049 lu
= get_link_kind(type
);
1050 if (ulinep
&& !strcmp(ulinep
, "_slave"))
1051 iflatype
= IFLA_INFO_SLAVE_DATA
;
1053 iflatype
= IFLA_INFO_DATA
;
1059 struct rtattr
*data
;
1061 data
= addattr_nest(&req
.n
, sizeof(req
), iflatype
);
1063 if (lu
->parse_opt
&&
1064 lu
->parse_opt(lu
, argc
, argv
, &req
.n
))
1067 addattr_nest_end(&req
.n
, data
);
1069 if (matches(*argv
, "help") == 0)
1072 "Garbage instead of arguments \"%s ...\". Try \"ip link help\".\n",
1076 addattr_nest_end(&req
.n
, linkinfo
);
1077 } else if (flags
& NLM_F_CREATE
) {
1079 "Not enough information: \"type\" argument is required\n");
1083 if (rtnl_talk(&rth
, &req
.n
, NULL
) < 0)
1086 /* remove device from cache; next use can refresh with new data */
1087 ll_drop_by_index(req
.i
.ifi_index
);
1092 int iplink_get(char *name
, __u32 filt_mask
)
1094 struct iplink_req req
= {
1095 .n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct ifinfomsg
)),
1096 .n
.nlmsg_flags
= NLM_F_REQUEST
,
1097 .n
.nlmsg_type
= RTM_GETLINK
,
1098 .i
.ifi_family
= preferred_family
,
1100 struct nlmsghdr
*answer
;
1103 addattr_l(&req
.n
, sizeof(req
),
1104 IFLA_IFNAME
, name
, strlen(name
) + 1);
1106 addattr32(&req
.n
, sizeof(req
), IFLA_EXT_MASK
, filt_mask
);
1108 if (rtnl_talk(&rth
, &req
.n
, &answer
) < 0)
1111 open_json_object(NULL
);
1112 print_linkinfo(answer
, stdout
);
1113 close_json_object();
1119 #if IPLINK_IOCTL_COMPAT
1120 static int get_ctl_fd(void)
1125 fd
= socket(PF_INET
, SOCK_DGRAM
, 0);
1129 fd
= socket(PF_PACKET
, SOCK_DGRAM
, 0);
1132 fd
= socket(PF_INET6
, SOCK_DGRAM
, 0);
1136 perror("Cannot create control socket");
1140 static int do_chflags(const char *dev
, __u32 flags
, __u32 mask
)
1146 strlcpy(ifr
.ifr_name
, dev
, IFNAMSIZ
);
1150 err
= ioctl(fd
, SIOCGIFFLAGS
, &ifr
);
1152 perror("SIOCGIFFLAGS");
1156 if ((ifr
.ifr_flags
^flags
)&mask
) {
1157 ifr
.ifr_flags
&= ~mask
;
1158 ifr
.ifr_flags
|= mask
&flags
;
1159 err
= ioctl(fd
, SIOCSIFFLAGS
, &ifr
);
1161 perror("SIOCSIFFLAGS");
1167 static int do_changename(const char *dev
, const char *newdev
)
1173 strlcpy(ifr
.ifr_name
, dev
, IFNAMSIZ
);
1174 strlcpy(ifr
.ifr_newname
, newdev
, IFNAMSIZ
);
1178 err
= ioctl(fd
, SIOCSIFNAME
, &ifr
);
1180 perror("SIOCSIFNAME");
1188 static int set_qlen(const char *dev
, int qlen
)
1190 struct ifreq ifr
= { .ifr_qlen
= qlen
};
1197 strlcpy(ifr
.ifr_name
, dev
, IFNAMSIZ
);
1198 if (ioctl(s
, SIOCSIFTXQLEN
, &ifr
) < 0) {
1199 perror("SIOCSIFXQLEN");
1208 static int set_mtu(const char *dev
, int mtu
)
1210 struct ifreq ifr
= { .ifr_mtu
= mtu
};
1217 strlcpy(ifr
.ifr_name
, dev
, IFNAMSIZ
);
1218 if (ioctl(s
, SIOCSIFMTU
, &ifr
) < 0) {
1219 perror("SIOCSIFMTU");
1228 static int get_address(const char *dev
, int *htype
)
1230 struct ifreq ifr
= {};
1231 struct sockaddr_ll me
= {
1232 .sll_family
= AF_PACKET
,
1233 .sll_protocol
= htons(ETH_P_LOOP
),
1238 s
= socket(PF_PACKET
, SOCK_DGRAM
, 0);
1240 perror("socket(PF_PACKET)");
1244 strlcpy(ifr
.ifr_name
, dev
, IFNAMSIZ
);
1245 if (ioctl(s
, SIOCGIFINDEX
, &ifr
) < 0) {
1246 perror("SIOCGIFINDEX");
1251 me
.sll_ifindex
= ifr
.ifr_ifindex
;
1252 if (bind(s
, (struct sockaddr
*)&me
, sizeof(me
)) == -1) {
1259 if (getsockname(s
, (struct sockaddr
*)&me
, &alen
) == -1) {
1260 perror("getsockname");
1265 *htype
= me
.sll_hatype
;
1266 return me
.sll_halen
;
1269 static int parse_address(const char *dev
, int hatype
, int halen
,
1270 char *lla
, struct ifreq
*ifr
)
1274 memset(ifr
, 0, sizeof(*ifr
));
1275 strlcpy(ifr
->ifr_name
, dev
, IFNAMSIZ
);
1276 ifr
->ifr_hwaddr
.sa_family
= hatype
;
1277 alen
= ll_addr_a2n(ifr
->ifr_hwaddr
.sa_data
, 14, lla
);
1280 if (alen
!= halen
) {
1282 "Wrong address (%s) length: expected %d bytes\n",
1289 static int set_address(struct ifreq
*ifr
, int brd
)
1296 if (ioctl(s
, brd
?SIOCSIFHWBROADCAST
:SIOCSIFHWADDR
, ifr
) < 0) {
1297 perror(brd
?"SIOCSIFHWBROADCAST":"SIOCSIFHWADDR");
1305 static int do_set(int argc
, char **argv
)
1312 char *newaddr
= NULL
;
1313 char *newbrd
= NULL
;
1314 struct ifreq ifr0
, ifr1
;
1315 char *newname
= NULL
;
1319 if (strcmp(*argv
, "up") == 0) {
1322 } else if (strcmp(*argv
, "down") == 0) {
1325 } else if (strcmp(*argv
, "name") == 0) {
1327 if (check_ifname(*argv
))
1328 invarg("\"name\" not a valid ifname", *argv
);
1330 } else if (matches(*argv
, "address") == 0) {
1333 } else if (matches(*argv
, "broadcast") == 0 ||
1334 strcmp(*argv
, "brd") == 0) {
1337 } else if (matches(*argv
, "txqueuelen") == 0 ||
1338 strcmp(*argv
, "qlen") == 0 ||
1339 matches(*argv
, "txqlen") == 0) {
1342 duparg("txqueuelen", *argv
);
1343 if (get_integer(&qlen
, *argv
, 0))
1344 invarg("Invalid \"txqueuelen\" value\n", *argv
);
1345 } else if (strcmp(*argv
, "mtu") == 0) {
1348 duparg("mtu", *argv
);
1349 if (get_integer(&mtu
, *argv
, 0))
1350 invarg("Invalid \"mtu\" value\n", *argv
);
1351 } else if (strcmp(*argv
, "multicast") == 0) {
1353 mask
|= IFF_MULTICAST
;
1355 if (strcmp(*argv
, "on") == 0)
1356 flags
|= IFF_MULTICAST
;
1357 else if (strcmp(*argv
, "off") == 0)
1358 flags
&= ~IFF_MULTICAST
;
1360 return on_off("multicast", *argv
);
1361 } else if (strcmp(*argv
, "allmulticast") == 0) {
1363 mask
|= IFF_ALLMULTI
;
1365 if (strcmp(*argv
, "on") == 0)
1366 flags
|= IFF_ALLMULTI
;
1367 else if (strcmp(*argv
, "off") == 0)
1368 flags
&= ~IFF_ALLMULTI
;
1370 return on_off("allmulticast", *argv
);
1371 } else if (strcmp(*argv
, "promisc") == 0) {
1373 mask
|= IFF_PROMISC
;
1375 if (strcmp(*argv
, "on") == 0)
1376 flags
|= IFF_PROMISC
;
1377 else if (strcmp(*argv
, "off") == 0)
1378 flags
&= ~IFF_PROMISC
;
1380 return on_off("promisc", *argv
);
1381 } else if (strcmp(*argv
, "trailers") == 0) {
1383 mask
|= IFF_NOTRAILERS
;
1385 if (strcmp(*argv
, "off") == 0)
1386 flags
|= IFF_NOTRAILERS
;
1387 else if (strcmp(*argv
, "on") == 0)
1388 flags
&= ~IFF_NOTRAILERS
;
1390 return on_off("trailers", *argv
);
1391 } else if (strcmp(*argv
, "arp") == 0) {
1395 if (strcmp(*argv
, "on") == 0)
1396 flags
&= ~IFF_NOARP
;
1397 else if (strcmp(*argv
, "off") == 0)
1400 return on_off("arp", *argv
);
1401 } else if (matches(*argv
, "dynamic") == 0) {
1403 mask
|= IFF_DYNAMIC
;
1405 if (strcmp(*argv
, "on") == 0)
1406 flags
|= IFF_DYNAMIC
;
1407 else if (strcmp(*argv
, "off") == 0)
1408 flags
&= ~IFF_DYNAMIC
;
1410 return on_off("dynamic", *argv
);
1412 if (strcmp(*argv
, "dev") == 0)
1414 else if (matches(*argv
, "help") == 0)
1418 duparg2("dev", *argv
);
1419 if (check_ifname(*argv
))
1420 invarg("\"dev\" not a valid ifname", *argv
);
1428 "Not enough of information: \"dev\" argument is required.\n");
1432 if (newaddr
|| newbrd
) {
1433 halen
= get_address(dev
, &htype
);
1437 if (parse_address(dev
, htype
, halen
,
1438 newaddr
, &ifr0
) < 0)
1442 if (parse_address(dev
, htype
, halen
,
1448 if (newname
&& strcmp(dev
, newname
)) {
1449 if (do_changename(dev
, newname
) < 0)
1454 if (set_qlen(dev
, qlen
) < 0)
1458 if (set_mtu(dev
, mtu
) < 0)
1461 if (newaddr
|| newbrd
) {
1463 if (set_address(&ifr1
, 1) < 0)
1467 if (set_address(&ifr0
, 0) < 0)
1472 return do_chflags(dev
, flags
, mask
);
1475 #endif /* IPLINK_IOCTL_COMPAT */
1477 static void print_mpls_stats(FILE *fp
, struct rtattr
*attr
)
1479 struct rtattr
*mrtb
[MPLS_STATS_MAX
+1];
1480 struct mpls_link_stats
*stats
;
1482 parse_rtattr(mrtb
, MPLS_STATS_MAX
, RTA_DATA(attr
),
1484 if (!mrtb
[MPLS_STATS_LINK
])
1487 stats
= RTA_DATA(mrtb
[MPLS_STATS_LINK
]);
1489 fprintf(fp
, " mpls:\n");
1490 fprintf(fp
, " RX: bytes packets errors dropped noroute\n");
1492 print_num(fp
, 10, stats
->rx_bytes
);
1493 print_num(fp
, 8, stats
->rx_packets
);
1494 print_num(fp
, 7, stats
->rx_errors
);
1495 print_num(fp
, 8, stats
->rx_dropped
);
1496 print_num(fp
, 7, stats
->rx_noroute
);
1498 fprintf(fp
, " TX: bytes packets errors dropped\n");
1500 print_num(fp
, 10, stats
->tx_bytes
);
1501 print_num(fp
, 8, stats
->tx_packets
);
1502 print_num(fp
, 7, stats
->tx_errors
);
1503 print_num(fp
, 7, stats
->tx_dropped
);
1507 static void print_af_stats_attr(FILE *fp
, int ifindex
, struct rtattr
*attr
)
1509 bool if_printed
= false;
1513 rem
= RTA_PAYLOAD(attr
);
1514 for (i
= RTA_DATA(attr
); RTA_OK(i
, rem
); i
= RTA_NEXT(i
, rem
)) {
1515 if (preferred_family
!= AF_UNSPEC
&&
1516 i
->rta_type
!= preferred_family
)
1520 fprintf(fp
, "%u: %s\n", ifindex
,
1521 ll_index_to_name(ifindex
));
1525 switch (i
->rta_type
) {
1527 print_mpls_stats(fp
, i
);
1530 fprintf(fp
, " unknown af(%d)\n", i
->rta_type
);
1536 struct af_stats_ctx
{
1541 static int print_af_stats(struct nlmsghdr
*n
, void *arg
)
1543 struct if_stats_msg
*ifsm
= NLMSG_DATA(n
);
1544 struct rtattr
*tb
[IFLA_STATS_MAX
+1];
1545 int len
= n
->nlmsg_len
;
1546 struct af_stats_ctx
*ctx
= arg
;
1549 len
-= NLMSG_LENGTH(sizeof(*ifsm
));
1551 fprintf(stderr
, "BUG: wrong nlmsg len %d\n", len
);
1555 if (ctx
->ifindex
&& ifsm
->ifindex
!= ctx
->ifindex
)
1558 parse_rtattr(tb
, IFLA_STATS_MAX
, IFLA_STATS_RTA(ifsm
), len
);
1560 if (tb
[IFLA_STATS_AF_SPEC
])
1561 print_af_stats_attr(fp
, ifsm
->ifindex
, tb
[IFLA_STATS_AF_SPEC
]);
1567 static int iplink_afstats(int argc
, char **argv
)
1569 __u32 filt_mask
= IFLA_STATS_FILTER_BIT(IFLA_STATS_AF_SPEC
);
1570 const char *filter_dev
= NULL
;
1571 struct af_stats_ctx ctx
= {
1577 if (strcmp(*argv
, "dev") == 0) {
1580 duparg2("dev", *argv
);
1582 } else if (matches(*argv
, "help") == 0) {
1586 "Command \"%s\" is unknown, try \"ip link help\".\n",
1595 ctx
.ifindex
= ll_name_to_index(filter_dev
);
1596 if (ctx
.ifindex
<= 0) {
1598 "Device \"%s\" does not exist.\n",
1604 if (rtnl_statsdump_req_filter(&rth
, AF_UNSPEC
, filt_mask
) < 0) {
1605 perror("Cannont send dump request");
1609 if (rtnl_dump_filter(&rth
, print_af_stats
, &ctx
) < 0) {
1610 fprintf(stderr
, "Dump terminated\n");
1617 static void do_help(int argc
, char **argv
)
1619 struct link_util
*lu
= NULL
;
1626 lu
= get_link_kind(*argv
);
1627 if (lu
&& lu
->print_help
)
1628 lu
->print_help(lu
, argc
-1, argv
+1, stdout
);
1633 int do_iplink(int argc
, char **argv
)
1636 return ipaddr_list_link(0, NULL
);
1638 if (iplink_have_newlink()) {
1639 if (matches(*argv
, "add") == 0)
1640 return iplink_modify(RTM_NEWLINK
,
1641 NLM_F_CREATE
|NLM_F_EXCL
,
1643 if (matches(*argv
, "set") == 0 ||
1644 matches(*argv
, "change") == 0)
1645 return iplink_modify(RTM_NEWLINK
, 0,
1647 if (matches(*argv
, "replace") == 0)
1648 return iplink_modify(RTM_NEWLINK
,
1649 NLM_F_CREATE
|NLM_F_REPLACE
,
1651 if (matches(*argv
, "delete") == 0)
1652 return iplink_modify(RTM_DELLINK
, 0,
1655 #if IPLINK_IOCTL_COMPAT
1656 if (matches(*argv
, "set") == 0)
1657 return do_set(argc
-1, argv
+1);
1661 if (matches(*argv
, "show") == 0 ||
1662 matches(*argv
, "lst") == 0 ||
1663 matches(*argv
, "list") == 0)
1664 return ipaddr_list_link(argc
-1, argv
+1);
1666 if (matches(*argv
, "xstats") == 0)
1667 return iplink_ifla_xstats(argc
-1, argv
+1);
1669 if (matches(*argv
, "afstats") == 0) {
1670 iplink_afstats(argc
-1, argv
+1);
1674 if (matches(*argv
, "help") == 0) {
1675 do_help(argc
-1, argv
+1);
1679 fprintf(stderr
, "Command \"%s\" is unknown, try \"ip link help\".\n",