From 3a0f0a4e6b2260ec084b8be7a2c23404821d8759 Mon Sep 17 00:00:00 2001
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Tue, 1 Aug 2023 09:42:49 +0200
Subject: [PATCH] 5.15-stable patches

added patches:
	selftests-mptcp-sockopt-use-iptables-legacy-if-available.patch
---
 ...opt-use-iptables-legacy-if-available.patch | 82 +++++++++++++++++++
 queue-5.15/series                             |  1 +
 2 files changed, 83 insertions(+)
 create mode 100644 queue-5.15/selftests-mptcp-sockopt-use-iptables-legacy-if-available.patch

diff --git a/queue-5.15/selftests-mptcp-sockopt-use-iptables-legacy-if-available.patch b/queue-5.15/selftests-mptcp-sockopt-use-iptables-legacy-if-available.patch
new file mode 100644
index 00000000000..9d67f88afd7
--- /dev/null
+++ b/queue-5.15/selftests-mptcp-sockopt-use-iptables-legacy-if-available.patch
@@ -0,0 +1,82 @@
+From a5a5990c099dd354e05e89ee77cd2dbf6655d4a1 Mon Sep 17 00:00:00 2001
+From: Matthieu Baerts <matthieu.baerts@tessares.net>
+Date: Tue, 4 Jul 2023 22:44:36 +0200
+Subject: selftests: mptcp: sockopt: use 'iptables-legacy' if available
+
+From: Matthieu Baerts <matthieu.baerts@tessares.net>
+
+commit a5a5990c099dd354e05e89ee77cd2dbf6655d4a1 upstream.
+
+IPTables commands using 'iptables-nft' fail on old kernels, at least
+on v5.15 because it doesn't see the default IPTables chains:
+
+  $ iptables -L
+  iptables/1.8.2 Failed to initialize nft: Protocol not supported
+
+As a first step before switching to NFTables, we can use iptables-legacy
+if available.
+
+Link: https://github.com/multipath-tcp/mptcp_net-next/issues/368
+Fixes: dc65fe82fb07 ("selftests: mptcp: add packet mark test case")
+Cc: stable@vger.kernel.org
+Acked-by: Paolo Abeni <pabeni@redhat.com>
+Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ tools/testing/selftests/net/mptcp/mptcp_sockopt.sh |   20 +++++++++++---------
+ 1 file changed, 11 insertions(+), 9 deletions(-)
+
+--- a/tools/testing/selftests/net/mptcp/mptcp_sockopt.sh
++++ b/tools/testing/selftests/net/mptcp/mptcp_sockopt.sh
+@@ -13,13 +13,15 @@ timeout_poll=30
+ timeout_test=$((timeout_poll * 2 + 1))
+ mptcp_connect=""
+ do_all_tests=1
++iptables="iptables"
++ip6tables="ip6tables"
+ 
+ add_mark_rules()
+ {
+ 	local ns=$1
+ 	local m=$2
+ 
+-	for t in iptables ip6tables; do
++	for t in ${iptables} ${ip6tables}; do
+ 		# just to debug: check we have multiple subflows connection requests
+ 		ip netns exec $ns $t -A OUTPUT -p tcp --syn -m mark --mark $m -j ACCEPT
+ 
+@@ -90,14 +92,14 @@ if [ $? -ne 0 ];then
+ 	exit $ksft_skip
+ fi
+ 
+-iptables -V > /dev/null 2>&1
+-if [ $? -ne 0 ];then
++# Use the legacy version if available to support old kernel versions
++if iptables-legacy -V &> /dev/null; then
++	iptables="iptables-legacy"
++	ip6tables="ip6tables-legacy"
++elif ! iptables -V &> /dev/null; then
+ 	echo "SKIP: Could not run all tests without iptables tool"
+ 	exit $ksft_skip
+-fi
+-
+-ip6tables -V > /dev/null 2>&1
+-if [ $? -ne 0 ];then
++elif ! ip6tables -V &> /dev/null; then
+ 	echo "SKIP: Could not run all tests without ip6tables tool"
+ 	exit $ksft_skip
+ fi
+@@ -107,10 +109,10 @@ check_mark()
+ 	local ns=$1
+ 	local af=$2
+ 
+-	tables=iptables
++	tables=${iptables}
+ 
+ 	if [ $af -eq 6 ];then
+-		tables=ip6tables
++		tables=${ip6tables}
+ 	fi
+ 
+ 	counters=$(ip netns exec $ns $tables -v -L OUTPUT | grep DROP)
diff --git a/queue-5.15/series b/queue-5.15/series
index 19aad76107d..02d98952114 100644
--- a/queue-5.15/series
+++ b/queue-5.15/series
@@ -149,3 +149,4 @@ tracing-fix-trace_event_raw_event_synth-if-else-statement.patch
 acpi-processor-perflib-use-the-no-limit-frequency-qos.patch
 acpi-processor-perflib-avoid-updating-frequency-qos-unnecessarily.patch
 cpufreq-intel_pstate-drop-acpi-_pss-states-table-patching.patch
+selftests-mptcp-sockopt-use-iptables-legacy-if-available.patch
-- 
2.47.3