[FRR]zebra: Fix fpm multipath encap addition (#17247) (#17375)

src/sonic-frr/patch/0032-zebra-Fix-fpm-multipath-encap-addition.patch

@@ -0,0 +1,58 @@
+From b7ac2397103fe7d347d0766bd9966ff2302403c5 Mon Sep 17 00:00:00 2001
+From: dgsudharsan <sudharsand@nvidia.com>
+Date: Tue, 21 Nov 2023 01:17:24 +0000
+Subject: [PATCH] zebra: Fix fpm multipath encap addition The fpm code path in
+ building a ecmp route for evpn has a bug that caused it to not add the encap
+ attribute to the netlink message.  See
+ #f0f7b285b99dbd971400d33feea007232c0bd4a9 for the single path case being
+ fixed.
+
+
+diff --git a/zebra/rt_netlink.c b/zebra/rt_netlink.c
+index 71505e037a..6bdc15592c 100644
+--- a/zebra/rt_netlink.c
++++ b/zebra/rt_netlink.c
+@@ -2330,6 +2330,16 @@ ssize_t netlink_route_multipath_msg_encode(int cmd,
+ 					    tag))
+ 					return 0;
+ 
++				/*
++				 * Add encapsulation information when installing via
++				 * FPM.
++				 */
++				if (fpm) {
++					if (!netlink_route_nexthop_encap(
++						    &req->n, datalen, nexthop))
++						return 0;
++				}
++
+ 				if (!setsrc && src1) {
+ 					if (p->family == AF_INET)
+ 						src.ipv4 = src1->ipv4;
+@@ -2343,23 +2353,6 @@ ssize_t netlink_route_multipath_msg_encode(int cmd,
+ 
+ 		nl_attr_nest_end(&req->n, nest);
+ 
+-		/*
+-		 * Add encapsulation information when installing via
+-		 * FPM.
+-		 */
+-		if (fpm) {
+-			for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx),
+-					      nexthop)) {
+-				if (CHECK_FLAG(nexthop->flags,
+-					       NEXTHOP_FLAG_RECURSIVE))
+-					continue;
+-				if (!netlink_route_nexthop_encap(
+-					    &req->n, datalen, nexthop))
+-					return 0;
+-			}
+-		}
+-
+-
+ 		if (setsrc) {
+ 			if (p->family == AF_INET) {
+ 				if (!nl_attr_put(&req->n, datalen, RTA_PREFSRC,
+-- 
+2.17.1
+

src/sonic-frr/patch/series

@@ -31,3 +31,4 @@ cross-compile-changes.patch
 0029-bgpd-Handle-MP_REACH_NLRI-malformed-packets-with-ses.patch
 0030-bgpd-Treat-EOR-as-withdrawn-to-avoid-unwanted-handli.patch
 0031-bgpd-Ignore-handling-NLRIs-if-we-received-MP_UNREACH.patch
+0032-zebra-Fix-fpm-multipath-encap-addition.patch