From 4c267f88c68f27af0701afb691f22055ee132530 Mon Sep 17 00:00:00 2001
From: Zach Brown <zab@versity.com>
Date: Fri, 28 Aug 2026 13:10:49 -0700
Subject: [PATCH] scoutfs: add portscan test

Signed-off-by: Zach Brown <zab@versity.com>
---
 tests/golden/portscan   |  3 +++
 tests/sequence          |  1 +
 tests/tests/portscan.sh | 31 +++++++++++++++++++++++++++++++
 3 files changed, 35 insertions(+)
 create mode 100644 tests/golden/portscan
 create mode 100644 tests/tests/portscan.sh

diff --git a/tests/golden/portscan b/tests/golden/portscan
new file mode 100644
index 00000000..acd95f46
--- /dev/null
+++ b/tests/golden/portscan
@@ -0,0 +1,3 @@
+== make sure unknown disconnect doesn't shut down server
+should be leader: 1
+should still be leader: 1
diff --git a/tests/sequence b/tests/sequence
index 401b36a4..05e9c1e5 100644
--- a/tests/sequence
+++ b/tests/sequence
@@ -65,4 +65,5 @@ block-stale-reads.sh
 freed-list-wedge.sh
 inode-deletion.sh
 renameat2-noreplace.sh
+portscan.sh
 xfstests.sh
diff --git a/tests/tests/portscan.sh b/tests/tests/portscan.sh
new file mode 100644
index 00000000..38fce852
--- /dev/null
+++ b/tests/tests/portscan.sh
@@ -0,0 +1,31 @@
+#
+# Make sure the server ignores connections that aren't participating.
+#
+
+t_require_commands nc
+
+echo "== make sure unknown disconnect doesn't shut down server"
+# get server addr [1] and port [1]
+sv=$(t_server_nr)
+addrs=($(grep "peer 0.0.0.0" $(t_debugfs_path $sv)/connections |  \
+	awk -F"[: ]" '{print $2,$3}'))
+
+# verify that the server is leader and record its term
+echo "should be leader: $(cat $(t_sysfs_path $sv)/quorum/is_leader)"
+before=$(awk '($1 == "term") { print $2 }' < $(t_sysfs_path $sv)/quorum/status)
+
+# send junk
+echo "  " | nc ${addrs[0]} ${addrs[1]}
+
+# make sure the server is still leader with the same term
+echo "should still be leader: $(cat $(t_sysfs_path $sv)/quorum/is_leader)"
+after=$(awk '($1 == "term") { print $2 }' < $(t_sysfs_path $sv)/quorum/status)
+
+if [ -z "$before" -o -z "$after" ]; then
+	echo "couldn't find terms: before '$before', or after '$after'"
+fi
+if [ "$before" != "$after" ]; then
+	echo "term before $before != term after $after"
+fi
+
+t_pass