From: Anuradha Karuppiah <anurad...@cumulusnetworks.com>
This patch adds support to set and display the IFF_PROTO_DOWN flag. 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 eth0 protodown on
root@net-next:~# ip link show eth0
3: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP,PROTO_DOWN> mtu 1500 qdisc pfifo_fas
t state DOWN mode DEFAULT group default qlen 1000
link/ether 00:01:00:00:06:ee brd ff:ff:ff:ff:ff:ff
root@net-next:~# ip link set eth0 protodown off
root@net-next:~# ip link show eth0
3: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mo
de DEFAULT group default qlen 1000
link/ether 00:01:00:00:06:ee brd ff:ff:ff:ff:ff:ff
root@net-next:~#
Signed-off-by: Anuradha Karuppiah <anurad...@cumulusnetworks.com>
Signed-off-by: Andy Gospodarek <go...@cumulusnetworks.com>
Signed-off-by: Roopa Prabhu <ro...@cumulusnetworks.com>
Signed-off-by: Wilson Kok <w...@cumulusnetworks.com>
---
include/linux/if.h | 4 ++++
ip/ipaddress.c | 1 +
ip/iplink.c | 19 +++++++++++++++++++
man/man8/ip-link.8.in | 8 ++++++++
4 files changed, 32 insertions(+)
diff --git a/include/linux/if.h b/include/linux/if.h
index a55a9e0..8018883 100644
--- a/include/linux/if.h
+++ b/include/linux/if.h
@@ -66,6 +66,8 @@
* @IFF_LOWER_UP: driver signals L1 up. Volatile.
* @IFF_DORMANT: driver signals dormant. Volatile.
* @IFF_ECHO: echo sent packets. Volatile.
+ * @IFF_PROTO_DOWN: protocol is down on the interface. Can be toggeled
+ * through sysfs.
*/
enum net_device_flags {
IFF_UP = 1<<0, /* sysfs */
@@ -87,6 +89,7 @@ enum net_device_flags {
IFF_LOWER_UP = 1<<16, /* __volatile__ */
IFF_DORMANT = 1<<17, /* __volatile__ */
IFF_ECHO = 1<<18, /* __volatile__ */
+ IFF_PROTO_DOWN = 1<<19, /* sysfs */
};
#define IFF_UP IFF_UP
@@ -108,6 +111,7 @@ enum net_device_flags {
#define IFF_LOWER_UP IFF_LOWER_UP
#define IFF_DORMANT IFF_DORMANT
#define IFF_ECHO IFF_ECHO
+#define IFF_PROTO_DOWN IFF_PROTO_DOWN
#define IFF_VOLATILE (IFF_LOOPBACK|IFF_POINTOPOINT|IFF_BROADCAST|IFF_ECHO|\
IFF_MASTER|IFF_SLAVE|IFF_RUNNING|IFF_LOWER_UP|IFF_DORMANT)
diff --git a/ip/ipaddress.c b/ip/ipaddress.c
index e582da0..572f1c8 100644
--- a/ip/ipaddress.c
+++ b/ip/ipaddress.c
@@ -119,6 +119,7 @@ static void print_link_flags(FILE *fp, unsigned flags,
unsigned mdown)
_PF(LOWER_UP);
_PF(DORMANT);
_PF(ECHO);
+ _PF(PROTO_DOWN);
#undef _PF
if (flags)
fprintf(fp, "%x", flags);
diff --git a/ip/iplink.c b/ip/iplink.c
index e6f30e9..4b7d8dc 100644
--- a/ip/iplink.c
+++ b/ip/iplink.c
@@ -64,6 +64,7 @@ void iplink_usage(void)
fprintf(stderr, " [ multicast { on | off }
]\n");
fprintf(stderr, " [ allmulticast { on | off }
]\n");
fprintf(stderr, " [ promisc { on | off } ]\n");
+ fprintf(stderr, " [ protodown { on | off }
]\n");
fprintf(stderr, " [ trailers { on | off } ]\n");
fprintf(stderr, " [ txqueuelen PACKETS ]\n");
fprintf(stderr, " [ name NEWNAME ]\n");
@@ -494,6 +495,15 @@ int iplink_parse(int argc, char **argv, struct iplink_req
*req,
req->i.ifi_flags |= IFF_NOARP;
} else
return on_off("noarp", *argv);
+ } else if (strcmp(*argv, "protodown") == 0) {
+ NEXT_ARG();
+ req->i.ifi_change |= IFF_PROTO_DOWN;
+ if (strcmp(*argv, "on") == 0) {
+ req->i.ifi_flags |= IFF_PROTO_DOWN;
+ } else if (strcmp(*argv, "off") == 0) {
+ req->i.ifi_flags &= ~IFF_PROTO_DOWN;
+ } else
+ return on_off("protodown", *argv);
} else if (strcmp(*argv, "vf") == 0) {
struct rtattr *vflist;
NEXT_ARG();
@@ -1076,6 +1086,15 @@ static int do_set(int argc, char **argv)
flags |= IFF_NOARP;
} else
return on_off("noarp", *argv);
+ } else if (strcmp(*argv, "protodown") == 0) {
+ NEXT_ARG();
+ mask |= IFF_PROTO_DOWN;
+ if (strcmp(*argv, "on") == 0) {
+ flags |= IFF_PROTO_DOWN;
+ } else if (strcmp(*argv, "off") == 0) {
+ flags &= ~IFF_PROTO_DOWN;
+ } else
+ return on_off("protodown", *argv);
} else if (matches(*argv, "dynamic") == 0) {
NEXT_ARG();
mask |= IFF_DYNAMIC;
diff --git a/man/man8/ip-link.8.in b/man/man8/ip-link.8.in
index 5ad372c..25c8f66 100644
--- a/man/man8/ip-link.8.in
+++ b/man/man8/ip-link.8.in
@@ -96,6 +96,8 @@ ip-link \- network device configuration
.br
.BR multicast " { " on " | " off " } |"
.br
+.BR protodown " { " on " | " off " } |"
+.br
.B txqueuelen
.IR PACKETS " |"
.br
@@ -634,6 +636,12 @@ change the
flag on the device.
.TP
+.BR "protodown on " or " protodown off"
+change the
+.B PROTODOWN
+flag on the device.
+
+.TP
.BR "dynamic on " or " dynamic off"
change the
.B DYNAMIC
--
1.7.10.4
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