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ip link: proto_down config and display. 

This patch adds support to set and display protodown on a switch port. The
switch driver can handle this error state by doing a phys down on the port.

One example user space application setting this flag is a multi-chassis
LAG application to handle split-brain situation on peer-link failure.

Example:
root@net-next:~# ip link set eth1 protodown on
root@net-next:~/iproute2# ip link show eth1
4: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ether 52:54:00:12:35:01 brd ff:ff:ff:ff:ff:ff protodown on
root@net-next:~/iproute2# ip link set eth1 protodown off
root@net-next:~/iproute2# ip link show eth1
4: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ether 52:54:00:12:35:01 brd ff:ff:ff:ff:ff:ff
root@net-next:~/iproute2#

Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
Signed-off-by: Andy Gospodarek <gospo@cumulusnetworks.com>
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: Wilson Kok <wkok@cumulusnetworks.com>
This commit is contained in:
Anuradha Karuppiah 2015-07-14 13:43:22 -07:00 committed by Stephen Hemminger
parent a3563ede2d
commit 188648270a
3 changed files with 26 additions and 0 deletions
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5
ip/ipaddress.c
View File

@ -744,6 +744,11 @@ int print_linkinfo(const struct sockaddr_nl *who,
fprintf(fp, " link-netnsid unknown");
}
if (tb[IFLA_PROTO_DOWN]) {
if (rta_getattr_u8(tb[IFLA_PROTO_DOWN]))
fprintf(fp, " protodown on ");
}
if (tb[IFLA_PROMISCUITY] && show_details)
fprintf(fp, " promiscuity %u ",
*(int*)RTA_DATA(tb[IFLA_PROMISCUITY]));

13
ip/iplink.c
View File

@ -85,6 +85,7 @@ void iplink_usage(void)
fprintf(stderr, " [ master DEVICE ]\n");
fprintf(stderr, " [ nomaster ]\n");
fprintf(stderr, " [ addrgenmode { eui64 | none } ]\n");
fprintf(stderr, " [ protodown { on | off } ]\n");
fprintf(stderr, " ip link show [ DEVICE | group GROUP ] [up] [master DEV] [type TYPE]\n");
if (iplink_have_newlink()) {
@ -612,6 +613,18 @@ int iplink_parse(int argc, char **argv, struct iplink_req *req,
invarg("Invalid \"link-netnsid\" value\n", *argv);
addattr32(&req->n, sizeof(*req), IFLA_LINK_NETNSID,
link_netnsid);
} else if (strcmp(*argv, "protodown") == 0) {
unsigned int proto_down;
NEXT_ARG();
if (strcmp(*argv, "on") == 0)
proto_down = 1;
else if (strcmp(*argv, "off") == 0)
proto_down = 0;
else
return on_off("protodown", *argv);
addattr8(&req->n, sizeof(*req), IFLA_PROTO_DOWN,
proto_down);
} else {
if (strcmp(*argv, "dev") == 0) {
NEXT_ARG();

8
man/man8/ip-link.8.in
View File

@ -101,6 +101,8 @@ ip-link \- network device configuration
.br
.BR multicast " { " on " | " off " } |"
.br
.BR protodown " { " on " | " off " } |"
.br
.B txqueuelen
.IR PACKETS " |"
.br
@ -681,6 +683,12 @@ change the
.B MULTICAST
flag on the device.
.TP
.BR "protodown on " or " protodown off"
change the
.B PROTODOWN
state on the device. Indicates that a protocol error has been detected on the port. Switch drivers can react to this error by doing a phys down on the switch port.
.TP
.BR "dynamic on " or " dynamic off"
change the