test/nvme: add test for rapid namespace remapping

Add a test for rapid namespace remapping to simulate short-lived
namespaces being created and deleted in rapid succession with a
cluster.

Signed-off-by: Hannes Reinecke <[email protected]>

common/nvme

@@ -555,6 +555,16 @@ _create_nvmet_ns() {
 	echo "${uuid}"
 }
 
+_get_nvmet_ns_blkdev() {
+	local nvmet_subsystem="$1"
+	local nsid="$2"
+	local subsys_path="${NVMET_CFS}/subsystems/${nvmet_subsystem}"
+	local ns_path="${subsys_path}/namespaces/${nsid}"
+
+	blkdev="$(cat ${ns_path}/device_path)"
+	echo "${blkdev}"
+}
+
 _setup_nvmet_ns_ana() {
 	local nvmet_subsystem="$1"
 	local nsid="$2"

tests/nvme/055

@@ -0,0 +1,114 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-3.0+
+# Copyright (C) 2024 Hannes Reinecke (SUSE) <[email protected]>
+#
+# Test rapid remapping of namespaces
+
+. tests/nvme/rc
+
+DESCRIPTION="test rapid namespace remapping"
+
+requires() {
+	_nvme_requires
+	_have_loop
+	_have_fio
+	_require_nvme_trtype_is_fabrics
+}
+
+set_conditions() {
+	_set_nvme_trtype "$@"
+}
+
+_setup_ana() {
+	local portno=0
+
+	for port in "$@"; do
+		if (( portno == 0 )); then
+			_setup_nvmet_port_ana "${port}" 1 "optimized"
+			_setup_nvmet_port_ana "${port}" 2 "inaccessible"
+			_setup_nvmet_port_ana "${port}" 3 "inaccessible"
+		elif (( portno == 1 )); then
+			_setup_nvmet_port_ana "${port}" 1 "non-optimized"
+			_setup_nvmet_port_ana "${port}" 2 "inaccessible"
+			_setup_nvmet_port_ana "${port}" 3 "inaccessible"
+		elif (( portno == 2 )); then
+			_setup_nvmet_port_ana "${port}" 1 "inaccessible"
+			_setup_nvmet_port_ana "${port}" 2 "optimized"
+			_setup_nvmet_port_ana "${port}" 3 "inaccessible"
+		elif (( portno == 3 )); then
+			_setup_nvmet_port_ana "${port}" 1 "inaccessible"
+			_setup_nvmet_port_ana "${port}" 2 "non-optimized"
+			_setup_nvmet_port_ana "${port}" 3 "inaccessible"
+		elif (( portno == 4 )); then
+			_setup_nvmet_port_ana "${port}" 1 "inaccessible"
+			_setup_nvmet_port_ana "${port}" 2 "inaccessible"
+			_setup_nvmet_port_ana "${port}" 3 "optimized"
+		else
+			_setup_nvmet_port_ana "${port}" 1 "inaccessible"
+			_setup_nvmet_port_ana "${port}" 2 "inaccessible"
+			_setup_nvmet_port_ana "${port}" 3 "non-optimized"
+		fi
+		portno=$(( portno + 1 ))
+	done
+}
+
+_remap_ns() {
+	local subsysnqn="${def_subsysnqn}"
+	local grpid="$1"
+	local nsid="${2:-1}"
+	local new_uuid="$(uuidgen)"
+	local blkdev
+
+	blkdev=$(_get_nvmet_ns_blkdev "${subsysnqn}" "${nsid}")
+	_remove_nvmet_ns "${subsysnqn}" "${nsid}"
+	_create_nvmet_ns --subsysnqn "${subsysnqn}" --nsid "${nsid}" \
+			 --blkdev "${blkdev}" --uuid "${new_uuid}" \
+			 --grpid "${grpid}" > /dev/null
+}
+
+test() {
+	echo "Running ${TEST_NAME}"
+
+	_setup_nvmet
+
+	local d
+	local i
+	local -a ports
+	local ctrls
+
+	_nvmet_target_setup --ports 6 --blkdev none
+
+	for d in $(seq 1 3); do
+		local file_path
+		local blkdev
+		local uuid
+
+		file_path="${TMPDIR}/img${d}"
+		truncate -s "${NVME_IMG_SIZE}" "${file_path}"
+		blkdev="$(losetup -f --show "${file_path}")"
+		uuid="$(uuidgen)"
+		_create_nvmet_ns --nsid "${d}" --blkdev "${blkdev}" \
+				 --uuid "${uuid}" --grpid "${d}" > /dev/null
+	done
+
+	read -ra ports < <(_get_nvmet_ports)
+	_setup_ana "${ports[@]}"
+
+	for port in "${ports[@]}"; do
+		_nvme_connect_subsys --port "${port}"
+	done
+
+	# Simulate unmap on one cluster node and remap to anther one
+	for i in $(seq 0 10); do
+		echo "Remap namespace #${i}"
+		grpid=$(( (i % 3) + 1 ))
+		for n in $(seq 1 3 | shuf); do
+			_remap_ns "${grpid}" "${n}"
+		done
+	done
+
+	_nvme_disconnect_subsys
+	_nvmet_target_cleanup
+
+	echo "Test complete"
+}

tests/nvme/055.out

@@ -0,0 +1,14 @@
+Running nvme/055
+Remap namespace #0
+Remap namespace #1
+Remap namespace #2
+Remap namespace #3
+Remap namespace #4
+Remap namespace #5
+Remap namespace #6
+Remap namespace #7
+Remap namespace #8
+Remap namespace #9
+Remap namespace #10
+disconnected 6 controller(s)
+Test complete