From 1fbff3fcfe0dc2ba063726d703a39bbfc2182b56 Mon Sep 17 00:00:00 2001
From: Phil Sutter <psutter@redhat.com>
Date: Tue, 28 Feb 2017 16:09:46 +0100
Subject: [PATCH] bridge/link: add learning_sync policy flag

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1417289
Upstream Status: iproute2.git commit 674bb438bc5cc

commit 674bb438bc5cc61a9e16f97a236203ea2f50523f
Author: Scott Feldman <sfeldma@gmail.com>
Date:   Mon Dec 29 12:20:07 2014 -0800

    bridge/link: add learning_sync policy flag

    v2:

    Resending now that the dust has cleared in 3.18 on "self" vs. hwmode debate for
    brport settings.  learning_sync is now set/cleared using "self" qualifier on
    brport.

    v1:

    Add 'learned_sync' flag to turn on/off syncing of learned MAC addresses from
    offload device to bridge's FDB.   Flag is be set/cleared on offload device port
    using "self" qualifier:

      $ sudo bridge link set dev swp1 learning_sync on self

      $ bridge -d link show dev swp1
      2: swp1 state UNKNOWN : <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master br0 state forwarding priority 32 cost 2
          hairpin off guard off root_block off fastleave off learning off flood off
      2: swp1 state UNKNOWN : <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master br0
          learning on learning_sync on

    Adds new IFLA_BRPORT_LEARNED_SYNCED attribute for IFLA_PROTINFO on the SELF
    brport.

    Signed-off-by: Scott Feldman <sfeldma@gmail.com>
---
 bridge/link.c     | 12 ++++++++++++
 man/man8/bridge.8 |  6 ++++++
 2 files changed, 18 insertions(+)

diff --git a/bridge/link.c b/bridge/link.c
index 4e0fd96..8b18931 100644
--- a/bridge/link.c
+++ b/bridge/link.c
@@ -188,6 +188,9 @@ int print_linkinfo(const struct sockaddr_nl *who,
 				if (prtb[IFLA_BRPORT_LEARNING])
 					print_onoff(fp, "learning",
 						    rta_getattr_u8(prtb[IFLA_BRPORT_LEARNING]));
+				if (prtb[IFLA_BRPORT_LEARNING_SYNC])
+					print_onoff(fp, "learning_sync",
+						    rta_getattr_u8(prtb[IFLA_BRPORT_LEARNING_SYNC]));
 				if (prtb[IFLA_BRPORT_UNICAST_FLOOD])
 					print_onoff(fp, "flood",
 						    rta_getattr_u8(prtb[IFLA_BRPORT_UNICAST_FLOOD]));
@@ -221,6 +224,7 @@ static void usage(void)
 	fprintf(stderr, "                               [ fastleave {on | off} ]\n");
 	fprintf(stderr,	"                               [ root_block {on | off} ]\n");
 	fprintf(stderr,	"                               [ learning {on | off} ]\n");
+	fprintf(stderr,	"                               [ learning_sync {on | off} ]\n");
 	fprintf(stderr,	"                               [ flood {on | off} ]\n");
 	fprintf(stderr, "                               [ hwmode {vepa | veb} ]\n");
 	fprintf(stderr, "       bridge link show [dev DEV]\n");
@@ -252,6 +256,7 @@ static int brlink_modify(int argc, char **argv)
 	} req;
 	char *d = NULL;
 	__s8 learning = -1;
+	__s8 learning_sync = -1;
 	__s8 flood = -1;
 	__s8 hairpin = -1;
 	__s8 bpdu_guard = -1;
@@ -295,6 +300,10 @@ static int brlink_modify(int argc, char **argv)
 			NEXT_ARG();
 			if (!on_off("learning", &learning, *argv))
 				exit(-1);
+		} else if (strcmp(*argv, "learning_sync") == 0) {
+			NEXT_ARG();
+			if (!on_off("learning_sync", &learning_sync, *argv))
+				exit(-1);
 		} else if (strcmp(*argv, "flood") == 0) {
 			NEXT_ARG();
 			if (!on_off("flood", &flood, *argv))
@@ -359,6 +368,9 @@ static int brlink_modify(int argc, char **argv)
 		addattr8(&req.n, sizeof(req), IFLA_BRPORT_UNICAST_FLOOD, flood);
 	if (learning >= 0)
 		addattr8(&req.n, sizeof(req), IFLA_BRPORT_LEARNING, learning);
+	if (learning_sync >= 0)
+		addattr8(&req.n, sizeof(req), IFLA_BRPORT_LEARNING_SYNC,
+			 learning_sync);
 
 	if (cost > 0)
 		addattr32(&req.n, sizeof(req), IFLA_BRPORT_COST, cost);
diff --git a/man/man8/bridge.8 b/man/man8/bridge.8
index 5e51d54..42fe922 100644
--- a/man/man8/bridge.8
+++ b/man/man8/bridge.8
@@ -38,6 +38,7 @@ bridge \- show / manipulate bridge addresses and devices
 .BR fastleave " { " on " | " off " } ] [ "
 .BR root_block " { " on " | " off " } ] [ "
 .BR learning " { " on " | " off " } ] [ "
+.BR learning_sync " { " on " | " off " } ] [ "
 .BR flood " { " on " | " off " } ] [ "
 .BR hwmode " { " vepa " | " veb " } ] "
 
@@ -263,6 +264,11 @@ not.  If learning if off, the bridge will end up flooding any traffic for which
 it has no FDB entry.  By default this flag is on.
 
 .TP
+.BR "learning_sync on " or " learning_sync off "
+Controls whether a given port will sync MAC addresses learned on device port to
+bridge FDB.
+
+.TP
 .BR "flooding on " or " flooding off "
 Controls whether a given port will flood unicast traffic for which there is no FDB entry.  By default this flag is on.
 
-- 
1.8.3.1