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>
20 #include <sys/socket.h>
22 #include <linux/if_packet.h>
23 #include <linux/if_ether.h>
24 #include <linux/sockios.h>
25 #include <netinet/in.h>
26 #include <arpa/inet.h>
28 #include <sys/ioctl.h>
30 #include <linux/mpls.h>
34 #include "ip_common.h"
36 #include "namespace.h"
38 #define IPLINK_IOCTL_COMPAT 1
40 #define LIBDIR "/usr/lib"
43 static void usage(void) __attribute__((noreturn
));
44 static int iplink_have_newlink(void);
46 void iplink_usage(void)
48 if (iplink_have_newlink()) {
50 "Usage: ip link add [link DEV] [ name ] NAME\n"
51 " [ txqueuelen PACKETS ]\n"
52 " [ address LLADDR ]\n"
53 " [ broadcast LLADDR ]\n"
54 " [ mtu MTU ] [index IDX ]\n"
55 " [ numtxqueues QUEUE_COUNT ]\n"
56 " [ numrxqueues QUEUE_COUNT ]\n"
57 " type TYPE [ ARGS ]\n"
59 " ip link delete { DEVICE | dev DEVICE | group DEVGROUP } type TYPE [ ARGS ]\n"
61 " ip link set { DEVICE | dev DEVICE | group DEVGROUP }\n"
62 " [ { up | down } ]\n"
63 " [ type TYPE ARGS ]\n");
66 "Usage: ip link set DEVICE [ { up | down } ]\n");
69 " [ arp { on | off } ]\n"
70 " [ dynamic { on | off } ]\n"
71 " [ multicast { on | off } ]\n"
72 " [ allmulticast { on | off } ]\n"
73 " [ promisc { on | off } ]\n"
74 " [ trailers { on | off } ]\n"
75 " [ carrier { on | off } ]\n"
76 " [ txqueuelen PACKETS ]\n"
78 " [ address LLADDR ]\n"
79 " [ broadcast LLADDR ]\n"
81 " [ netns { PID | NAME } ]\n"
82 " [ link-netnsid ID ]\n"
84 " [ vf NUM [ mac LLADDR ]\n"
85 " [ vlan VLANID [ qos VLAN-QOS ] [ proto VLAN-PROTO ] ]\n"
87 " [ max_tx_rate TXRATE ]\n"
88 " [ min_tx_rate TXRATE ]\n"
89 " [ spoofchk { on | off} ]\n"
90 " [ query_rss { on | off} ]\n"
91 " [ state { auto | enable | disable} ] ]\n"
92 " [ trust { on | off} ] ]\n"
93 " [ node_guid { eui64 } ]\n"
94 " [ port_guid { eui64 } ]\n"
96 " object FILE [ section NAME ] [ verbose ] |\n"
98 " [ master DEVICE ][ vrf NAME ]\n"
100 " [ addrgenmode { eui64 | none | stable_secret | random } ]\n"
101 " [ protodown { on | off } ]\n"
103 " ip link show [ DEVICE | group GROUP ] [up] [master DEV] [vrf NAME] [type TYPE]\n");
105 fprintf(stderr
, "\n ip link xstats type TYPE [ ARGS ]\n");
106 fprintf(stderr
, "\n ip link afstats [ dev DEVICE ]\n");
108 if (iplink_have_newlink()) {
111 " ip link help [ TYPE ]\n"
113 "TYPE := { vlan | veth | vcan | dummy | ifb | macvlan | macvtap |\n"
114 " bridge | bond | team | ipoib | ip6tnl | ipip | sit | vxlan |\n"
115 " gre | gretap | erspan | ip6gre | ip6gretap | ip6erspan |\n"
116 " vti | nlmon | team_slave | bond_slave | ipvlan | geneve |\n"
117 " bridge_slave | vrf | macsec }\n");
122 static void usage(void)
127 static int on_off(const char *msg
, const char *realval
)
130 "Error: argument of \"%s\" must be \"on\" or \"off\", not \"%s\"\n",
135 static void *BODY
; /* cached dlopen(NULL) handle */
136 static struct link_util
*linkutil_list
;
138 struct link_util
*get_link_kind(const char *id
)
144 for (l
= linkutil_list
; l
; l
= l
->next
)
145 if (strcmp(l
->id
, id
) == 0)
148 snprintf(buf
, sizeof(buf
), LIBDIR
"/ip/link_%s.so", id
);
149 dlh
= dlopen(buf
, RTLD_LAZY
);
151 /* look in current binary, only open once */
154 dlh
= BODY
= dlopen(NULL
, RTLD_LAZY
);
160 snprintf(buf
, sizeof(buf
), "%s_link_util", id
);
165 l
->next
= linkutil_list
;
170 static int get_link_mode(const char *mode
)
172 if (strcasecmp(mode
, "default") == 0)
173 return IF_LINK_MODE_DEFAULT
;
174 if (strcasecmp(mode
, "dormant") == 0)
175 return IF_LINK_MODE_DORMANT
;
179 static int get_addr_gen_mode(const char *mode
)
181 if (strcasecmp(mode
, "eui64") == 0)
182 return IN6_ADDR_GEN_MODE_EUI64
;
183 if (strcasecmp(mode
, "none") == 0)
184 return IN6_ADDR_GEN_MODE_NONE
;
185 if (strcasecmp(mode
, "stable_secret") == 0)
186 return IN6_ADDR_GEN_MODE_STABLE_PRIVACY
;
187 if (strcasecmp(mode
, "random") == 0)
188 return IN6_ADDR_GEN_MODE_RANDOM
;
192 #if IPLINK_IOCTL_COMPAT
193 static int have_rtnl_newlink
= -1;
195 static int accept_msg(const struct sockaddr_nl
*who
,
196 struct rtnl_ctrl_data
*ctrl
,
197 struct nlmsghdr
*n
, void *arg
)
199 struct nlmsgerr
*err
= (struct nlmsgerr
*)NLMSG_DATA(n
);
201 if (n
->nlmsg_type
== NLMSG_ERROR
&&
202 (err
->error
== -EOPNOTSUPP
|| err
->error
== -EINVAL
))
203 have_rtnl_newlink
= 0;
205 have_rtnl_newlink
= 1;
209 static int iplink_have_newlink(void)
216 .n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct ifinfomsg
)),
217 .n
.nlmsg_flags
= NLM_F_REQUEST
| NLM_F_ACK
,
218 .n
.nlmsg_type
= RTM_NEWLINK
,
219 .i
.ifi_family
= AF_UNSPEC
,
222 if (have_rtnl_newlink
< 0) {
223 if (rtnl_send(&rth
, &req
.n
, req
.n
.nlmsg_len
) < 0) {
224 perror("request send failed");
227 rtnl_listen(&rth
, accept_msg
, NULL
);
229 return have_rtnl_newlink
;
231 #else /* IPLINK_IOCTL_COMPAT */
232 static int iplink_have_newlink(void)
236 #endif /* ! IPLINK_IOCTL_COMPAT */
238 static int nl_get_ll_addr_len(unsigned int dev_index
)
241 struct iplink_req req
= {
243 .nlmsg_len
= NLMSG_LENGTH(sizeof(struct ifinfomsg
)),
244 .nlmsg_type
= RTM_GETLINK
,
245 .nlmsg_flags
= NLM_F_REQUEST
248 .ifi_family
= preferred_family
,
249 .ifi_index
= dev_index
,
252 struct nlmsghdr
*answer
;
253 struct rtattr
*tb
[IFLA_MAX
+1];
255 if (rtnl_talk(&rth
, &req
.n
, &answer
) < 0)
258 len
= answer
->nlmsg_len
- NLMSG_LENGTH(sizeof(struct ifinfomsg
));
264 parse_rtattr_flags(tb
, IFLA_MAX
, IFLA_RTA(NLMSG_DATA(answer
)),
266 if (!tb
[IFLA_ADDRESS
]) {
272 return RTA_PAYLOAD(tb
[IFLA_ADDRESS
]);
275 static void iplink_parse_vf_vlan_info(int vf
, int *argcp
, char ***argvp
,
276 struct ifla_vf_vlan_info
*ivvip
)
279 char **argv
= *argvp
;
282 if (get_unsigned(&ivvip
->vlan
, *argv
, 0))
283 invarg("Invalid \"vlan\" value\n", *argv
);
287 ivvip
->vlan_proto
= htons(ETH_P_8021Q
);
290 if (matches(*argv
, "qos") == 0) {
292 if (get_unsigned(&ivvip
->qos
, *argv
, 0))
293 invarg("Invalid \"qos\" value\n", *argv
);
301 if (matches(*argv
, "proto") == 0) {
303 if (ll_proto_a2n(&ivvip
->vlan_proto
, *argv
))
304 invarg("protocol is invalid\n", *argv
);
305 if (ivvip
->vlan_proto
!= htons(ETH_P_8021AD
) &&
306 ivvip
->vlan_proto
!= htons(ETH_P_8021Q
)) {
309 char msg
[64 + sizeof(b1
) + sizeof(b2
)];
312 "Invalid \"vlan protocol\" value - supported %s, %s\n",
313 ll_proto_n2a(htons(ETH_P_8021Q
),
315 ll_proto_n2a(htons(ETH_P_8021AD
),
329 static int iplink_parse_vf(int vf
, int *argcp
, char ***argvp
,
330 struct iplink_req
*req
, int dev_index
)
332 char new_rate_api
= 0, count
= 0, override_legacy_rate
= 0;
333 struct ifla_vf_rate tivt
;
334 int len
, argc
= *argcp
;
335 char **argv
= *argvp
;
336 struct rtattr
*vfinfo
;
338 tivt
.min_tx_rate
= -1;
339 tivt
.max_tx_rate
= -1;
341 vfinfo
= addattr_nest(&req
->n
, sizeof(*req
), IFLA_VF_INFO
);
343 while (NEXT_ARG_OK()) {
346 if (!matches(*argv
, "max_tx_rate")) {
349 /* override legacy rate */
350 override_legacy_rate
= 1;
351 } else if (!matches(*argv
, "min_tx_rate")) {
362 while (NEXT_ARG_OK()) {
364 if (matches(*argv
, "mac") == 0) {
365 struct ifla_vf_mac ivm
= { 0 };
366 int halen
= nl_get_ll_addr_len(dev_index
);
370 len
= ll_addr_a2n((char *)ivm
.mac
, 32, *argv
);
373 if (halen
> 0 && len
!= halen
) {
375 "Invalid address length %d - must be %d bytes\n",
379 addattr_l(&req
->n
, sizeof(*req
), IFLA_VF_MAC
,
381 } else if (matches(*argv
, "vlan") == 0) {
382 struct ifla_vf_vlan_info ivvi
;
384 iplink_parse_vf_vlan_info(vf
, &argc
, &argv
, &ivvi
);
385 /* support the old interface in case of older kernel*/
386 if (ivvi
.vlan_proto
== htons(ETH_P_8021Q
)) {
387 struct ifla_vf_vlan ivv
;
390 ivv
.vlan
= ivvi
.vlan
;
392 addattr_l(&req
->n
, sizeof(*req
),
393 IFLA_VF_VLAN
, &ivv
, sizeof(ivv
));
395 struct rtattr
*vfvlanlist
;
397 vfvlanlist
= addattr_nest(&req
->n
, sizeof(*req
),
399 addattr_l(&req
->n
, sizeof(*req
),
400 IFLA_VF_VLAN_INFO
, &ivvi
,
403 while (NEXT_ARG_OK()) {
405 if (matches(*argv
, "vlan") != 0) {
409 iplink_parse_vf_vlan_info(vf
, &argc
,
411 addattr_l(&req
->n
, sizeof(*req
),
412 IFLA_VF_VLAN_INFO
, &ivvi
,
415 addattr_nest_end(&req
->n
, vfvlanlist
);
417 } else if (matches(*argv
, "rate") == 0) {
418 struct ifla_vf_tx_rate ivt
;
421 if (get_unsigned(&ivt
.rate
, *argv
, 0))
422 invarg("Invalid \"rate\" value\n", *argv
);
426 addattr_l(&req
->n
, sizeof(*req
),
427 IFLA_VF_TX_RATE
, &ivt
, sizeof(ivt
));
428 else if (!override_legacy_rate
)
429 tivt
.max_tx_rate
= ivt
.rate
;
431 } else if (matches(*argv
, "max_tx_rate") == 0) {
433 if (get_unsigned(&tivt
.max_tx_rate
, *argv
, 0))
434 invarg("Invalid \"max tx rate\" value\n",
438 } else if (matches(*argv
, "min_tx_rate") == 0) {
440 if (get_unsigned(&tivt
.min_tx_rate
, *argv
, 0))
441 invarg("Invalid \"min tx rate\" value\n",
445 } else if (matches(*argv
, "spoofchk") == 0) {
446 struct ifla_vf_spoofchk ivs
;
449 if (matches(*argv
, "on") == 0)
451 else if (matches(*argv
, "off") == 0)
454 return on_off("spoofchk", *argv
);
456 addattr_l(&req
->n
, sizeof(*req
), IFLA_VF_SPOOFCHK
,
459 } else if (matches(*argv
, "query_rss") == 0) {
460 struct ifla_vf_rss_query_en ivs
;
463 if (matches(*argv
, "on") == 0)
465 else if (matches(*argv
, "off") == 0)
468 return on_off("query_rss", *argv
);
470 addattr_l(&req
->n
, sizeof(*req
), IFLA_VF_RSS_QUERY_EN
,
473 } else if (matches(*argv
, "trust") == 0) {
474 struct ifla_vf_trust ivt
;
477 if (matches(*argv
, "on") == 0)
479 else if (matches(*argv
, "off") == 0)
482 invarg("Invalid \"trust\" value\n", *argv
);
484 addattr_l(&req
->n
, sizeof(*req
), IFLA_VF_TRUST
,
487 } else if (matches(*argv
, "state") == 0) {
488 struct ifla_vf_link_state ivl
;
491 if (matches(*argv
, "auto") == 0)
492 ivl
.link_state
= IFLA_VF_LINK_STATE_AUTO
;
493 else if (matches(*argv
, "enable") == 0)
494 ivl
.link_state
= IFLA_VF_LINK_STATE_ENABLE
;
495 else if (matches(*argv
, "disable") == 0)
496 ivl
.link_state
= IFLA_VF_LINK_STATE_DISABLE
;
498 invarg("Invalid \"state\" value\n", *argv
);
500 addattr_l(&req
->n
, sizeof(*req
), IFLA_VF_LINK_STATE
,
502 } else if (matches(*argv
, "node_guid") == 0) {
503 struct ifla_vf_guid ivg
;
507 if (get_guid(&ivg
.guid
, *argv
)) {
508 invarg("Invalid GUID format\n", *argv
);
511 addattr_l(&req
->n
, sizeof(*req
), IFLA_VF_IB_NODE_GUID
,
513 } else if (matches(*argv
, "port_guid") == 0) {
514 struct ifla_vf_guid ivg
;
518 if (get_guid(&ivg
.guid
, *argv
)) {
519 invarg("Invalid GUID format\n", *argv
);
522 addattr_l(&req
->n
, sizeof(*req
), IFLA_VF_IB_PORT_GUID
,
534 if (tivt
.min_tx_rate
== -1 || tivt
.max_tx_rate
== -1) {
535 ipaddr_get_vf_rate(tivt
.vf
, &tmin
, &tmax
, dev_index
);
536 if (tivt
.min_tx_rate
== -1)
537 tivt
.min_tx_rate
= tmin
;
538 if (tivt
.max_tx_rate
== -1)
539 tivt
.max_tx_rate
= tmax
;
541 addattr_l(&req
->n
, sizeof(*req
), IFLA_VF_RATE
, &tivt
,
546 incomplete_command();
548 addattr_nest_end(&req
->n
, vfinfo
);
555 int iplink_parse(int argc
, char **argv
, struct iplink_req
*req
,
556 char **name
, char **type
, char **link
, char **dev
,
557 int *group
, int *index
)
565 int numtxqueues
= -1;
566 int numrxqueues
= -1;
568 int link_netnsid
= -1;
575 if (strcmp(*argv
, "up") == 0) {
576 req
->i
.ifi_change
|= IFF_UP
;
577 req
->i
.ifi_flags
|= IFF_UP
;
578 } else if (strcmp(*argv
, "down") == 0) {
579 req
->i
.ifi_change
|= IFF_UP
;
580 req
->i
.ifi_flags
&= ~IFF_UP
;
581 } else if (strcmp(*argv
, "name") == 0) {
583 if (check_ifname(*argv
))
584 invarg("\"name\" not a valid ifname", *argv
);
586 } else if (strcmp(*argv
, "index") == 0) {
588 *index
= atoi(*argv
);
590 invarg("Invalid \"index\" value", *argv
);
591 } else if (matches(*argv
, "link") == 0) {
594 } else if (matches(*argv
, "address") == 0) {
596 addr_len
= ll_addr_a2n(abuf
, sizeof(abuf
), *argv
);
599 addattr_l(&req
->n
, sizeof(*req
),
600 IFLA_ADDRESS
, abuf
, addr_len
);
601 } else if (matches(*argv
, "broadcast") == 0 ||
602 strcmp(*argv
, "brd") == 0) {
604 len
= ll_addr_a2n(abuf
, sizeof(abuf
), *argv
);
607 addattr_l(&req
->n
, sizeof(*req
),
608 IFLA_BROADCAST
, abuf
, len
);
609 } else if (matches(*argv
, "txqueuelen") == 0 ||
610 strcmp(*argv
, "qlen") == 0 ||
611 matches(*argv
, "txqlen") == 0) {
614 duparg("txqueuelen", *argv
);
615 if (get_integer(&qlen
, *argv
, 0))
616 invarg("Invalid \"txqueuelen\" value\n", *argv
);
617 addattr_l(&req
->n
, sizeof(*req
),
618 IFLA_TXQLEN
, &qlen
, 4);
619 } else if (strcmp(*argv
, "mtu") == 0) {
622 duparg("mtu", *argv
);
623 if (get_integer(&mtu
, *argv
, 0))
624 invarg("Invalid \"mtu\" value\n", *argv
);
625 addattr_l(&req
->n
, sizeof(*req
), IFLA_MTU
, &mtu
, 4);
626 } else if (strcmp(*argv
, "xdpgeneric") == 0 ||
627 strcmp(*argv
, "xdpdrv") == 0 ||
628 strcmp(*argv
, "xdpoffload") == 0 ||
629 strcmp(*argv
, "xdp") == 0) {
630 bool generic
= strcmp(*argv
, "xdpgeneric") == 0;
631 bool drv
= strcmp(*argv
, "xdpdrv") == 0;
632 bool offload
= strcmp(*argv
, "xdpoffload") == 0;
635 if (xdp_parse(&argc
, &argv
, req
, generic
, drv
,
638 } else if (strcmp(*argv
, "netns") == 0) {
641 duparg("netns", *argv
);
642 netns
= netns_get_fd(*argv
);
644 addattr_l(&req
->n
, sizeof(*req
), IFLA_NET_NS_FD
,
646 else if (get_integer(&netns
, *argv
, 0) == 0)
647 addattr_l(&req
->n
, sizeof(*req
),
648 IFLA_NET_NS_PID
, &netns
, 4);
650 invarg("Invalid \"netns\" value\n", *argv
);
651 } else if (strcmp(*argv
, "multicast") == 0) {
653 req
->i
.ifi_change
|= IFF_MULTICAST
;
655 if (strcmp(*argv
, "on") == 0)
656 req
->i
.ifi_flags
|= IFF_MULTICAST
;
657 else if (strcmp(*argv
, "off") == 0)
658 req
->i
.ifi_flags
&= ~IFF_MULTICAST
;
660 return on_off("multicast", *argv
);
661 } else if (strcmp(*argv
, "allmulticast") == 0) {
663 req
->i
.ifi_change
|= IFF_ALLMULTI
;
665 if (strcmp(*argv
, "on") == 0)
666 req
->i
.ifi_flags
|= IFF_ALLMULTI
;
667 else if (strcmp(*argv
, "off") == 0)
668 req
->i
.ifi_flags
&= ~IFF_ALLMULTI
;
670 return on_off("allmulticast", *argv
);
671 } else if (strcmp(*argv
, "promisc") == 0) {
673 req
->i
.ifi_change
|= IFF_PROMISC
;
675 if (strcmp(*argv
, "on") == 0)
676 req
->i
.ifi_flags
|= IFF_PROMISC
;
677 else if (strcmp(*argv
, "off") == 0)
678 req
->i
.ifi_flags
&= ~IFF_PROMISC
;
680 return on_off("promisc", *argv
);
681 } else if (strcmp(*argv
, "trailers") == 0) {
683 req
->i
.ifi_change
|= IFF_NOTRAILERS
;
685 if (strcmp(*argv
, "off") == 0)
686 req
->i
.ifi_flags
|= IFF_NOTRAILERS
;
687 else if (strcmp(*argv
, "on") == 0)
688 req
->i
.ifi_flags
&= ~IFF_NOTRAILERS
;
690 return on_off("trailers", *argv
);
691 } else if (strcmp(*argv
, "arp") == 0) {
693 req
->i
.ifi_change
|= IFF_NOARP
;
695 if (strcmp(*argv
, "on") == 0)
696 req
->i
.ifi_flags
&= ~IFF_NOARP
;
697 else if (strcmp(*argv
, "off") == 0)
698 req
->i
.ifi_flags
|= IFF_NOARP
;
700 return on_off("arp", *argv
);
701 } else if (strcmp(*argv
, "carrier") == 0) {
705 if (strcmp(*argv
, "on") == 0)
707 else if (strcmp(*argv
, "off") == 0)
710 return on_off("carrier", *argv
);
712 addattr8(&req
->n
, sizeof(*req
), IFLA_CARRIER
, carrier
);
713 } else if (strcmp(*argv
, "vf") == 0) {
714 struct rtattr
*vflist
;
717 if (get_integer(&vf
, *argv
, 0))
718 invarg("Invalid \"vf\" value\n", *argv
);
720 vflist
= addattr_nest(&req
->n
, sizeof(*req
),
725 len
= iplink_parse_vf(vf
, &argc
, &argv
, req
, dev_index
);
728 addattr_nest_end(&req
->n
, vflist
);
729 } else if (matches(*argv
, "master") == 0) {
733 ifindex
= ll_name_to_index(*argv
);
735 invarg("Device does not exist\n", *argv
);
736 addattr_l(&req
->n
, sizeof(*req
), IFLA_MASTER
,
738 } else if (strcmp(*argv
, "vrf") == 0) {
742 ifindex
= ll_name_to_index(*argv
);
744 invarg("Not a valid VRF name\n", *argv
);
745 if (!name_is_vrf(*argv
))
746 invarg("Not a valid VRF name\n", *argv
);
747 addattr_l(&req
->n
, sizeof(*req
), IFLA_MASTER
,
748 &ifindex
, sizeof(ifindex
));
749 } else if (matches(*argv
, "nomaster") == 0) {
752 addattr_l(&req
->n
, sizeof(*req
), IFLA_MASTER
,
754 } else if (matches(*argv
, "dynamic") == 0) {
756 req
->i
.ifi_change
|= IFF_DYNAMIC
;
758 if (strcmp(*argv
, "on") == 0)
759 req
->i
.ifi_flags
|= IFF_DYNAMIC
;
760 else if (strcmp(*argv
, "off") == 0)
761 req
->i
.ifi_flags
&= ~IFF_DYNAMIC
;
763 return on_off("dynamic", *argv
);
764 } else if (matches(*argv
, "type") == 0) {
769 } else if (matches(*argv
, "alias") == 0) {
771 addattr_l(&req
->n
, sizeof(*req
), IFLA_IFALIAS
,
772 *argv
, strlen(*argv
));
775 } else if (strcmp(*argv
, "group") == 0) {
778 duparg("group", *argv
);
779 if (rtnl_group_a2n(group
, *argv
))
780 invarg("Invalid \"group\" value\n", *argv
);
781 } else if (strcmp(*argv
, "mode") == 0) {
785 mode
= get_link_mode(*argv
);
787 invarg("Invalid link mode\n", *argv
);
788 addattr8(&req
->n
, sizeof(*req
), IFLA_LINKMODE
, mode
);
789 } else if (strcmp(*argv
, "state") == 0) {
793 state
= get_operstate(*argv
);
795 invarg("Invalid operstate\n", *argv
);
797 addattr8(&req
->n
, sizeof(*req
), IFLA_OPERSTATE
, state
);
798 } else if (matches(*argv
, "numtxqueues") == 0) {
800 if (numtxqueues
!= -1)
801 duparg("numtxqueues", *argv
);
802 if (get_integer(&numtxqueues
, *argv
, 0))
803 invarg("Invalid \"numtxqueues\" value\n",
805 addattr_l(&req
->n
, sizeof(*req
), IFLA_NUM_TX_QUEUES
,
807 } else if (matches(*argv
, "numrxqueues") == 0) {
809 if (numrxqueues
!= -1)
810 duparg("numrxqueues", *argv
);
811 if (get_integer(&numrxqueues
, *argv
, 0))
812 invarg("Invalid \"numrxqueues\" value\n",
814 addattr_l(&req
->n
, sizeof(*req
), IFLA_NUM_RX_QUEUES
,
816 } else if (matches(*argv
, "addrgenmode") == 0) {
817 struct rtattr
*afs
, *afs6
;
821 mode
= get_addr_gen_mode(*argv
);
823 invarg("Invalid address generation mode\n",
825 afs
= addattr_nest(&req
->n
, sizeof(*req
), IFLA_AF_SPEC
);
826 afs6
= addattr_nest(&req
->n
, sizeof(*req
), AF_INET6
);
827 addattr8(&req
->n
, sizeof(*req
),
828 IFLA_INET6_ADDR_GEN_MODE
, mode
);
829 addattr_nest_end(&req
->n
, afs6
);
830 addattr_nest_end(&req
->n
, afs
);
831 } else if (matches(*argv
, "link-netnsid") == 0) {
833 if (link_netnsid
!= -1)
834 duparg("link-netnsid", *argv
);
835 if (get_integer(&link_netnsid
, *argv
, 0))
836 invarg("Invalid \"link-netnsid\" value\n",
838 addattr32(&req
->n
, sizeof(*req
), IFLA_LINK_NETNSID
,
840 } else if (strcmp(*argv
, "protodown") == 0) {
841 unsigned int proto_down
;
844 if (strcmp(*argv
, "on") == 0)
846 else if (strcmp(*argv
, "off") == 0)
849 return on_off("protodown", *argv
);
850 addattr8(&req
->n
, sizeof(*req
), IFLA_PROTO_DOWN
,
853 if (matches(*argv
, "help") == 0)
856 if (strcmp(*argv
, "dev") == 0)
859 duparg2("dev", *argv
);
860 if (check_ifname(*argv
))
861 invarg("\"dev\" not a valid ifname", *argv
);
863 dev_index
= ll_name_to_index(*dev
);
868 if (dev_index
&& addr_len
) {
869 int halen
= nl_get_ll_addr_len(dev_index
);
871 if (halen
>= 0 && halen
!= addr_len
) {
873 "Invalid address length %d - must be %d bytes\n",
882 static int iplink_modify(int cmd
, unsigned int flags
, int argc
, char **argv
)
890 struct link_util
*lu
= NULL
;
891 struct iplink_req req
= {
892 .n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct ifinfomsg
)),
893 .n
.nlmsg_flags
= NLM_F_REQUEST
| flags
,
895 .i
.ifi_family
= preferred_family
,
899 ret
= iplink_parse(argc
, argv
,
900 &req
, &name
, &type
, &link
, &dev
, &group
, &index
);
909 addattr_l(&req
.n
, sizeof(req
), IFLA_GROUP
,
910 &group
, sizeof(group
));
914 "Garbage instead of arguments \"%s ...\". Try \"ip link help\".\n",
918 if (flags
& NLM_F_CREATE
) {
920 "group cannot be used when creating devices.\n");
925 addattr32(&req
.n
, sizeof(req
), IFLA_GROUP
, group
);
926 if (rtnl_talk(&rth
, &req
.n
, NULL
) < 0)
932 if (!(flags
& NLM_F_CREATE
)) {
935 "Not enough information: \"dev\" argument is required.\n");
938 if (cmd
== RTM_NEWLINK
&& index
!= -1) {
940 "index can be used only when creating devices.\n");
944 req
.i
.ifi_index
= ll_name_to_index(dev
);
945 if (req
.i
.ifi_index
== 0) {
946 fprintf(stderr
, "Cannot find device \"%s\"\n", dev
);
950 /* Allow "ip link add dev" and "ip link add name" */
957 ifindex
= ll_name_to_index(link
);
959 fprintf(stderr
, "Cannot find device \"%s\"\n",
963 addattr_l(&req
.n
, sizeof(req
), IFLA_LINK
, &ifindex
, 4);
969 req
.i
.ifi_index
= index
;
973 addattr_l(&req
.n
, sizeof(req
),
974 IFLA_IFNAME
, name
, strlen(name
) + 1);
978 struct rtattr
*linkinfo
;
979 char *ulinep
= strchr(type
, '_');
982 linkinfo
= addattr_nest(&req
.n
, sizeof(req
), IFLA_LINKINFO
);
983 addattr_l(&req
.n
, sizeof(req
), IFLA_INFO_KIND
, type
,
986 lu
= get_link_kind(type
);
987 if (ulinep
&& !strcmp(ulinep
, "_slave"))
988 iflatype
= IFLA_INFO_SLAVE_DATA
;
990 iflatype
= IFLA_INFO_DATA
;
993 = addattr_nest(&req
.n
,
994 sizeof(req
), iflatype
);
997 lu
->parse_opt(lu
, argc
, argv
, &req
.n
))
1000 addattr_nest_end(&req
.n
, data
);
1002 if (matches(*argv
, "help") == 0)
1005 "Garbage instead of arguments \"%s ...\". Try \"ip link help\".\n",
1009 addattr_nest_end(&req
.n
, linkinfo
);
1010 } else if (flags
& NLM_F_CREATE
) {
1012 "Not enough information: \"type\" argument is required\n");
1016 if (rtnl_talk(&rth
, &req
.n
, NULL
) < 0)
1022 int iplink_get(unsigned int flags
, char *name
, __u32 filt_mask
)
1024 struct iplink_req req
= {
1025 .n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct ifinfomsg
)),
1026 .n
.nlmsg_flags
= NLM_F_REQUEST
| flags
,
1027 .n
.nlmsg_type
= RTM_GETLINK
,
1028 .i
.ifi_family
= preferred_family
,
1030 struct nlmsghdr
*answer
;
1033 addattr_l(&req
.n
, sizeof(req
),
1034 IFLA_IFNAME
, name
, strlen(name
) + 1);
1036 addattr32(&req
.n
, sizeof(req
), IFLA_EXT_MASK
, filt_mask
);
1038 if (rtnl_talk(&rth
, &req
.n
, &answer
) < 0)
1041 open_json_object(NULL
);
1043 print_linkinfo_brief(NULL
, answer
, stdout
, NULL
);
1045 print_linkinfo(NULL
, answer
, stdout
);
1046 close_json_object();
1052 #if IPLINK_IOCTL_COMPAT
1053 static int get_ctl_fd(void)
1058 fd
= socket(PF_INET
, SOCK_DGRAM
, 0);
1062 fd
= socket(PF_PACKET
, SOCK_DGRAM
, 0);
1065 fd
= socket(PF_INET6
, SOCK_DGRAM
, 0);
1069 perror("Cannot create control socket");
1073 static int do_chflags(const char *dev
, __u32 flags
, __u32 mask
)
1079 strncpy(ifr
.ifr_name
, dev
, IFNAMSIZ
);
1083 err
= ioctl(fd
, SIOCGIFFLAGS
, &ifr
);
1085 perror("SIOCGIFFLAGS");
1089 if ((ifr
.ifr_flags
^flags
)&mask
) {
1090 ifr
.ifr_flags
&= ~mask
;
1091 ifr
.ifr_flags
|= mask
&flags
;
1092 err
= ioctl(fd
, SIOCSIFFLAGS
, &ifr
);
1094 perror("SIOCSIFFLAGS");
1100 static int do_changename(const char *dev
, const char *newdev
)
1106 strncpy(ifr
.ifr_name
, dev
, IFNAMSIZ
);
1107 strncpy(ifr
.ifr_newname
, newdev
, IFNAMSIZ
);
1111 err
= ioctl(fd
, SIOCSIFNAME
, &ifr
);
1113 perror("SIOCSIFNAME");
1121 static int set_qlen(const char *dev
, int qlen
)
1123 struct ifreq ifr
= { .ifr_qlen
= qlen
};
1130 strncpy(ifr
.ifr_name
, dev
, IFNAMSIZ
);
1131 if (ioctl(s
, SIOCSIFTXQLEN
, &ifr
) < 0) {
1132 perror("SIOCSIFXQLEN");
1141 static int set_mtu(const char *dev
, int mtu
)
1143 struct ifreq ifr
= { .ifr_mtu
= mtu
};
1150 strncpy(ifr
.ifr_name
, dev
, IFNAMSIZ
);
1151 if (ioctl(s
, SIOCSIFMTU
, &ifr
) < 0) {
1152 perror("SIOCSIFMTU");
1161 static int get_address(const char *dev
, int *htype
)
1163 struct ifreq ifr
= {};
1164 struct sockaddr_ll me
= {
1165 .sll_family
= AF_PACKET
,
1166 .sll_protocol
= htons(ETH_P_LOOP
),
1171 s
= socket(PF_PACKET
, SOCK_DGRAM
, 0);
1173 perror("socket(PF_PACKET)");
1177 strncpy(ifr
.ifr_name
, dev
, IFNAMSIZ
);
1178 if (ioctl(s
, SIOCGIFINDEX
, &ifr
) < 0) {
1179 perror("SIOCGIFINDEX");
1184 me
.sll_ifindex
= ifr
.ifr_ifindex
;
1185 if (bind(s
, (struct sockaddr
*)&me
, sizeof(me
)) == -1) {
1192 if (getsockname(s
, (struct sockaddr
*)&me
, &alen
) == -1) {
1193 perror("getsockname");
1198 *htype
= me
.sll_hatype
;
1199 return me
.sll_halen
;
1202 static int parse_address(const char *dev
, int hatype
, int halen
,
1203 char *lla
, struct ifreq
*ifr
)
1207 memset(ifr
, 0, sizeof(*ifr
));
1208 strncpy(ifr
->ifr_name
, dev
, IFNAMSIZ
);
1209 ifr
->ifr_hwaddr
.sa_family
= hatype
;
1210 alen
= ll_addr_a2n(ifr
->ifr_hwaddr
.sa_data
, 14, lla
);
1213 if (alen
!= halen
) {
1215 "Wrong address (%s) length: expected %d bytes\n",
1222 static int set_address(struct ifreq
*ifr
, int brd
)
1229 if (ioctl(s
, brd
?SIOCSIFHWBROADCAST
:SIOCSIFHWADDR
, ifr
) < 0) {
1230 perror(brd
?"SIOCSIFHWBROADCAST":"SIOCSIFHWADDR");
1238 static int do_set(int argc
, char **argv
)
1245 char *newaddr
= NULL
;
1246 char *newbrd
= NULL
;
1247 struct ifreq ifr0
, ifr1
;
1248 char *newname
= NULL
;
1252 if (strcmp(*argv
, "up") == 0) {
1255 } else if (strcmp(*argv
, "down") == 0) {
1258 } else if (strcmp(*argv
, "name") == 0) {
1260 if (check_ifname(*argv
))
1261 invarg("\"name\" not a valid ifname", *argv
);
1263 } else if (matches(*argv
, "address") == 0) {
1266 } else if (matches(*argv
, "broadcast") == 0 ||
1267 strcmp(*argv
, "brd") == 0) {
1270 } else if (matches(*argv
, "txqueuelen") == 0 ||
1271 strcmp(*argv
, "qlen") == 0 ||
1272 matches(*argv
, "txqlen") == 0) {
1275 duparg("txqueuelen", *argv
);
1276 if (get_integer(&qlen
, *argv
, 0))
1277 invarg("Invalid \"txqueuelen\" value\n", *argv
);
1278 } else if (strcmp(*argv
, "mtu") == 0) {
1281 duparg("mtu", *argv
);
1282 if (get_integer(&mtu
, *argv
, 0))
1283 invarg("Invalid \"mtu\" value\n", *argv
);
1284 } else if (strcmp(*argv
, "multicast") == 0) {
1286 mask
|= IFF_MULTICAST
;
1288 if (strcmp(*argv
, "on") == 0)
1289 flags
|= IFF_MULTICAST
;
1290 else if (strcmp(*argv
, "off") == 0)
1291 flags
&= ~IFF_MULTICAST
;
1293 return on_off("multicast", *argv
);
1294 } else if (strcmp(*argv
, "allmulticast") == 0) {
1296 mask
|= IFF_ALLMULTI
;
1298 if (strcmp(*argv
, "on") == 0)
1299 flags
|= IFF_ALLMULTI
;
1300 else if (strcmp(*argv
, "off") == 0)
1301 flags
&= ~IFF_ALLMULTI
;
1303 return on_off("allmulticast", *argv
);
1304 } else if (strcmp(*argv
, "promisc") == 0) {
1306 mask
|= IFF_PROMISC
;
1308 if (strcmp(*argv
, "on") == 0)
1309 flags
|= IFF_PROMISC
;
1310 else if (strcmp(*argv
, "off") == 0)
1311 flags
&= ~IFF_PROMISC
;
1313 return on_off("promisc", *argv
);
1314 } else if (strcmp(*argv
, "trailers") == 0) {
1316 mask
|= IFF_NOTRAILERS
;
1318 if (strcmp(*argv
, "off") == 0)
1319 flags
|= IFF_NOTRAILERS
;
1320 else if (strcmp(*argv
, "on") == 0)
1321 flags
&= ~IFF_NOTRAILERS
;
1323 return on_off("trailers", *argv
);
1324 } else if (strcmp(*argv
, "arp") == 0) {
1328 if (strcmp(*argv
, "on") == 0)
1329 flags
&= ~IFF_NOARP
;
1330 else if (strcmp(*argv
, "off") == 0)
1333 return on_off("arp", *argv
);
1334 } else if (matches(*argv
, "dynamic") == 0) {
1336 mask
|= IFF_DYNAMIC
;
1338 if (strcmp(*argv
, "on") == 0)
1339 flags
|= IFF_DYNAMIC
;
1340 else if (strcmp(*argv
, "off") == 0)
1341 flags
&= ~IFF_DYNAMIC
;
1343 return on_off("dynamic", *argv
);
1345 if (strcmp(*argv
, "dev") == 0)
1347 else if (matches(*argv
, "help") == 0)
1351 duparg2("dev", *argv
);
1352 if (check_ifname(*argv
))
1353 invarg("\"dev\" not a valid ifname", *argv
);
1361 "Not enough of information: \"dev\" argument is required.\n");
1365 if (newaddr
|| newbrd
) {
1366 halen
= get_address(dev
, &htype
);
1370 if (parse_address(dev
, htype
, halen
,
1371 newaddr
, &ifr0
) < 0)
1375 if (parse_address(dev
, htype
, halen
,
1381 if (newname
&& strcmp(dev
, newname
)) {
1382 if (do_changename(dev
, newname
) < 0)
1387 if (set_qlen(dev
, qlen
) < 0)
1391 if (set_mtu(dev
, mtu
) < 0)
1394 if (newaddr
|| newbrd
) {
1396 if (set_address(&ifr1
, 1) < 0)
1400 if (set_address(&ifr0
, 0) < 0)
1405 return do_chflags(dev
, flags
, mask
);
1408 #endif /* IPLINK_IOCTL_COMPAT */
1410 static void print_mpls_stats(FILE *fp
, struct rtattr
*attr
)
1412 struct rtattr
*mrtb
[MPLS_STATS_MAX
+1];
1413 struct mpls_link_stats
*stats
;
1415 parse_rtattr(mrtb
, MPLS_STATS_MAX
, RTA_DATA(attr
),
1417 if (!mrtb
[MPLS_STATS_LINK
])
1420 stats
= RTA_DATA(mrtb
[MPLS_STATS_LINK
]);
1422 fprintf(fp
, " mpls:\n");
1423 fprintf(fp
, " RX: bytes packets errors dropped noroute\n");
1425 print_num(fp
, 10, stats
->rx_bytes
);
1426 print_num(fp
, 8, stats
->rx_packets
);
1427 print_num(fp
, 7, stats
->rx_errors
);
1428 print_num(fp
, 8, stats
->rx_dropped
);
1429 print_num(fp
, 7, stats
->rx_noroute
);
1431 fprintf(fp
, " TX: bytes packets errors dropped\n");
1433 print_num(fp
, 10, stats
->tx_bytes
);
1434 print_num(fp
, 8, stats
->tx_packets
);
1435 print_num(fp
, 7, stats
->tx_errors
);
1436 print_num(fp
, 7, stats
->tx_dropped
);
1440 static void print_af_stats_attr(FILE *fp
, int ifindex
, struct rtattr
*attr
)
1442 bool if_printed
= false;
1446 rem
= RTA_PAYLOAD(attr
);
1447 for (i
= RTA_DATA(attr
); RTA_OK(i
, rem
); i
= RTA_NEXT(i
, rem
)) {
1448 if (preferred_family
!= AF_UNSPEC
&&
1449 i
->rta_type
!= preferred_family
)
1453 fprintf(fp
, "%u: %s\n", ifindex
,
1454 ll_index_to_name(ifindex
));
1458 switch (i
->rta_type
) {
1460 print_mpls_stats(fp
, i
);
1463 fprintf(fp
, " unknown af(%d)\n", i
->rta_type
);
1469 struct af_stats_ctx
{
1474 static int print_af_stats(const struct sockaddr_nl
*who
,
1478 struct if_stats_msg
*ifsm
= NLMSG_DATA(n
);
1479 struct rtattr
*tb
[IFLA_STATS_MAX
+1];
1480 int len
= n
->nlmsg_len
;
1481 struct af_stats_ctx
*ctx
= arg
;
1484 len
-= NLMSG_LENGTH(sizeof(*ifsm
));
1486 fprintf(stderr
, "BUG: wrong nlmsg len %d\n", len
);
1490 if (ctx
->ifindex
&& ifsm
->ifindex
!= ctx
->ifindex
)
1493 parse_rtattr(tb
, IFLA_STATS_MAX
, IFLA_STATS_RTA(ifsm
), len
);
1495 if (tb
[IFLA_STATS_AF_SPEC
])
1496 print_af_stats_attr(fp
, ifsm
->ifindex
, tb
[IFLA_STATS_AF_SPEC
]);
1502 static int iplink_afstats(int argc
, char **argv
)
1504 __u32 filt_mask
= IFLA_STATS_FILTER_BIT(IFLA_STATS_AF_SPEC
);
1505 const char *filter_dev
= NULL
;
1506 struct af_stats_ctx ctx
= {
1512 if (strcmp(*argv
, "dev") == 0) {
1515 duparg2("dev", *argv
);
1517 } else if (matches(*argv
, "help") == 0) {
1521 "Command \"%s\" is unknown, try \"ip link help\".\n",
1530 ctx
.ifindex
= ll_name_to_index(filter_dev
);
1531 if (ctx
.ifindex
<= 0) {
1533 "Device \"%s\" does not exist.\n",
1539 if (rtnl_wilddump_stats_req_filter(&rth
, AF_UNSPEC
,
1542 perror("Cannont send dump request");
1546 if (rtnl_dump_filter(&rth
, print_af_stats
, &ctx
) < 0) {
1547 fprintf(stderr
, "Dump terminated\n");
1554 static void do_help(int argc
, char **argv
)
1556 struct link_util
*lu
= NULL
;
1563 lu
= get_link_kind(*argv
);
1564 if (lu
&& lu
->print_help
)
1565 lu
->print_help(lu
, argc
-1, argv
+1, stdout
);
1570 int do_iplink(int argc
, char **argv
)
1573 return ipaddr_list_link(0, NULL
);
1575 if (iplink_have_newlink()) {
1576 if (matches(*argv
, "add") == 0)
1577 return iplink_modify(RTM_NEWLINK
,
1578 NLM_F_CREATE
|NLM_F_EXCL
,
1580 if (matches(*argv
, "set") == 0 ||
1581 matches(*argv
, "change") == 0)
1582 return iplink_modify(RTM_NEWLINK
, 0,
1584 if (matches(*argv
, "replace") == 0)
1585 return iplink_modify(RTM_NEWLINK
,
1586 NLM_F_CREATE
|NLM_F_REPLACE
,
1588 if (matches(*argv
, "delete") == 0)
1589 return iplink_modify(RTM_DELLINK
, 0,
1592 #if IPLINK_IOCTL_COMPAT
1593 if (matches(*argv
, "set") == 0)
1594 return do_set(argc
-1, argv
+1);
1598 if (matches(*argv
, "show") == 0 ||
1599 matches(*argv
, "lst") == 0 ||
1600 matches(*argv
, "list") == 0)
1601 return ipaddr_list_link(argc
-1, argv
+1);
1603 if (matches(*argv
, "xstats") == 0)
1604 return iplink_ifla_xstats(argc
-1, argv
+1);
1606 if (matches(*argv
, "afstats") == 0) {
1607 iplink_afstats(argc
-1, argv
+1);
1611 if (matches(*argv
, "help") == 0) {
1612 do_help(argc
-1, argv
+1);
1616 fprintf(stderr
, "Command \"%s\" is unknown, try \"ip link help\".\n",