From: Anuradha Karuppiah <anurad...@cumulusnetworks.com>
This patch adds support to set and display the IF_PROTOF_DOWN proto_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 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#
---
include/linux/if.h | 6 ++++++
include/linux/if_link.h | 12 ++++++++++++
ip/ipaddress.c | 19 +++++++++++++++++++
ip/iplink.c | 19 +++++++++++++++++++
man/man8/ip-link.8.in | 8 ++++++++
5 files changed, 64 insertions(+)
diff --git a/include/linux/if.h b/include/linux/if.h
index a55a9e0..97f53d8 100644
--- a/include/linux/if.h
+++ b/include/linux/if.h
@@ -156,6 +156,12 @@ enum {
IF_LINK_MODE_DORMANT, /* limit upward transition to dormant */
};
+/* proto_flags - port state information can be passed to the switch driver and
+ * used to determine the phys state of the switch port */
+enum {
+ IF_PROTOF_DOWN = 1<<0 /* set switch port phys state down */
+};
+
/*
* Device mapping structure. I'd just gone off and designed a
* beautiful scheme using only loadable modules with arguments
diff --git a/include/linux/if_link.h b/include/linux/if_link.h
index 8df6a84..f6e26ae 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_FLAGS_INFO,
__IFLA_MAX
};
@@ -649,4 +650,15 @@ enum {
#define IFLA_HSR_MAX (__IFLA_HSR_MAX - 1)
+
+/* proto_flags section */
+enum {
+ IFLA_PROTO_FLAGS_UNSPEC,
+ IFLA_PROTO_FLAGS_VAL,
+ IFLA_PROTO_FLAGS_CHANGE,
+ __IFLA_PROTO_FLAGS_MAX,
+};
+
+#define IFLA_PROTO_FLAGS_MAX (__IFLA_PROTO_FLAGS_MAX - 1)
+
#endif /* _LINUX_IF_LINK_H */
diff --git a/ip/ipaddress.c b/ip/ipaddress.c
index 85a81ba..78c473a 100644
--- a/ip/ipaddress.c
+++ b/ip/ipaddress.c
@@ -590,6 +590,22 @@ static void print_link_stats(FILE *fp, struct nlmsghdr *n)
fprintf(fp, "%s", _SL_);
}
+static void print_proto_flags(FILE *fp, struct rtattr *tb)
+{
+ struct rtattr *proto_info[IFLA_INFO_MAX+1];
+ uint32_t proto_flags;
+
+ parse_rtattr_nested(proto_info, IFLA_PROTO_FLAGS_MAX, tb);
+
+ if (proto_info[IFLA_PROTO_FLAGS_VAL]) {
+ proto_flags = *(uint32_t *)RTA_DATA(
+ proto_info[IFLA_PROTO_FLAGS_VAL]);
+ if (proto_flags & IF_PROTOF_DOWN) {
+ fprintf(fp, " protodown on");
+ }
+ }
+}
+
int print_linkinfo(const struct sockaddr_nl *who,
struct nlmsghdr *n, void *arg)
{
@@ -736,6 +752,9 @@ int print_linkinfo(const struct sockaddr_nl *who,
fprintf(fp, " link-netnsid unknown");
}
+ if (tb[IFLA_PROTO_FLAGS_INFO])
+ print_proto_flags(fp, tb[IFLA_PROTO_FLAGS_INFO]);
+
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..3471ca9 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 +613,24 @@ 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) {
+ struct rtattr *proto_info;
+ unsigned int proto_flags = 0;
+
+ NEXT_ARG();
+ if (strcmp(*argv, "on") == 0)
+ proto_flags |= IF_PROTOF_DOWN;
+ else if (strcmp(*argv, "off") != 0)
+ return on_off("protodown", *argv);
+ proto_info = addattr_nest(&req->n,
+ sizeof(*req),
+ IFLA_PROTO_FLAGS_INFO);
+ addattr32(&req->n, sizeof(*req),
+ IFLA_PROTO_FLAGS_VAL, proto_flags);
+ addattr32(&req->n, sizeof(*req),
+ IFLA_PROTO_FLAGS_CHANGE, IF_PROTOF_DOWN);
+
+ addattr_nest_end(&req->n, proto_info);
} 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..f35f6df 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
+proto_flag on the device.
+
+.TP
.BR "dynamic on " or " dynamic off"
change the
.B DYNAMIC
--
1.7.10.4
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