netdev - [PATCH iproute2 net-next] bridge: add option extern_learn to set NTF_EXT

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Date:   Mon, 19 Mar 2018 10:20:10 -0700
From:   Roopa Prabhu <roopa@...ulusnetworks.com>
To:     dsahern@...il.com
Cc:     netdev@...r.kernel.org, nikolay@...ulusnetworks.com
Subject: [PATCH iproute2 net-next] bridge: add option extern_learn to set NTF_EXT_LEARNED on fdb entries

From: Roopa Prabhu <roopa@...ulusnetworks.com>

NTF_EXT_LEARNED can be set by a user on bridge fdb entry.
Provide a bridge command option to allow a user to set
NTF_EXT_LEARNED on a bridge fdb entry.

Signed-off-by: Roopa Prabhu <roopa@...ulusnetworks.com>
---
 bridge/fdb.c      | 4 +++-
 man/man8/bridge.8 | 8 +++++++-
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/bridge/fdb.c b/bridge/fdb.c
index 205b4fa..4dbc894 100644
--- a/bridge/fdb.c
+++ b/bridge/fdb.c
@@ -36,7 +36,7 @@ static void usage(void)
 {
 	fprintf(stderr,
 		"Usage: bridge fdb { add | append | del | replace } ADDR dev DEV\n"
-		"              [ self ] [ master ] [ use ] [ router ]\n"
+		"              [ self ] [ master ] [ use ] [ router ] [ extern_learn ]\n"
 		"              [ local | static | dynamic ] [ dst IPADDR ] [ vlan VID ]\n"
 		"              [ port PORT] [ vni VNI ] [ via DEV ]\n"
 		"       bridge fdb [ show [ br BRDEV ] [ brport DEV ] [ vlan VID ] [ state STATE ] ]\n");
@@ -412,6 +412,8 @@ static int fdb_modify(int cmd, int flags, int argc, char **argv)
 			vid = atoi(*argv);
 		} else if (matches(*argv, "use") == 0) {
 			req.ndm.ndm_flags |= NTF_USE;
+		} else if (matches(*argv, "extern_learn") == 0) {
+			req.ndm.ndm_flags |= NTF_EXT_LEARNED;
 		} else {
 			if (strcmp(*argv, "to") == 0)
 				NEXT_ARG();
diff --git a/man/man8/bridge.8 b/man/man8/bridge.8
index 05512b0..e7f7148 100644
--- a/man/man8/bridge.8
+++ b/man/man8/bridge.8
@@ -61,7 +61,7 @@ bridge \- show / manipulate bridge addresses and devices
 .B dev
 .IR DEV " { "
 .BR local " | " static " | " dynamic " } [ "
-.BR self " ] [ " master " ] [ " router " ] [ " use " ] [ "
+.BR self " ] [ " master " ] [ " router " ] [ " use " ] [ " extern_learn " ] [ "
 .B dst
 .IR IPADDR " ] [ "
 .B vni
@@ -414,6 +414,12 @@ route shortcircuit enabled.
 indicate to the kernel that the fdb entry is in use.
 .sp
 
+.B extern_learn
+- this entry was learned externally. This option can be used to
+indicate to the kernel that an entry was hardware or user-space
+controller learnt dynamic entry. Kernel will not age such an entry.
+.sp
+
 .in -8
 The next command line parameters apply only
 when the specified device
-- 
2.1.4