[PATCH iproute2 v6 4/4] ip link: proto_down config and display.
DORMANTno replies
From: <hidden>
Date: 2015-07-14 15:32:23
Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Anuradha Karuppiah <redacted>
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 <redacted>
Signed-off-by: Andy Gospodarek <redacted>
Signed-off-by: Roopa Prabhu <redacted>
Signed-off-by: Wilson Kok <redacted>
---
include/linux/if_link.h | 1 +
ip/ipaddress.c | 7 +++++++
ip/iplink.c | 13 +++++++++++++
man/man8/ip-link.8.in | 8 ++++++++
4 files changed, 29 insertions(+)
diff --git a/include/linux/if_link.h b/include/linux/if_link.h
index 8df6a84..a06a461 100644
--- a/include/linux/if_link.h
+++ b/include/linux/if_link.h@@ -148,6 +148,7 @@ enum { IFLA_PHYS_SWITCH_ID, IFLA_LINK_NETNSID, IFLA_PHYS_PORT_NAME, + IFLA_PROTO_DOWN, __IFLA_MAX };
diff --git a/ip/ipaddress.c b/ip/ipaddress.c
index 85a81ba..0459442 100644
--- a/ip/ipaddress.c
+++ b/ip/ipaddress.c@@ -736,6 +736,13 @@ int print_linkinfo(const struct sockaddr_nl *who, fprintf(fp, " link-netnsid unknown"); } + if (tb[IFLA_PROTO_DOWN]) { + unsigned int proto_down = rta_getattr_u8(tb[IFLA_PROTO_DOWN]); + + if (proto_down) + fprintf(fp, " protodown on "); + } + if (tb[IFLA_PROMISCUITY] && show_details) fprintf(fp, " promiscuity %u ", *(int*)RTA_DATA(tb[IFLA_PROMISCUITY]));
diff --git a/ip/iplink.c b/ip/iplink.c
index e296e6f..369d50e 100644
--- a/ip/iplink.c
+++ b/ip/iplink.c@@ -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();
diff --git a/man/man8/ip-link.8.in b/man/man8/ip-link.8.in
index 372e6c6..c123fcc 100644
--- a/man/man8/ip-link.8.in
+++ b/man/man8/ip-link.8.in@@ -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
@@ -682,6 +684,12 @@ change the 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 .B DYNAMIC
--
1.7.10.4