[PATCH blktests v3] nvme/031: Add test to check controller deletion after setup

[Logan Gunthorpe <logang@deltatee.com>]

A number of bug fixes have been submitted to the kernel to
fix bugs when a controller is removed immediately after it is
set up. This new test ensures this doesn't regress.

Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
---

Changes for v3:
 * Drops the double loop_dev declaration (per Chaitanya)
 * Collected Sagi's reviewed-by tag

 tests/nvme/031     | 54 ++++++++++++++++++++++++++++++++++++++++++++++
 tests/nvme/031.out |  2 ++
 2 files changed, 56 insertions(+)
 create mode 100755 tests/nvme/031
 create mode 100644 tests/nvme/031.out

diff --git a/tests/nvme/031 b/tests/nvme/031
new file mode 100755
index 000000000000..892f20bad9a7
--- /dev/null
+++ b/tests/nvme/031
@@ -0,0 +1,54 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-3.0+
+# Copyright (C) 2019 Logan Gunthorpe
+#
+# Regression test for the following patches:
+#    nvme: fix controller removal race with scan work
+#    nvme: fix regression upon hot device removal and insertion
+#    nvme-core: Fix extra device_put() call on error path
+#    nvmet-loop: Flush nvme_delete_wq when removing the port
+#    nvmet: Fix use-after-free bug when a port is removed
+#
+# All these patches fix issues related to deleting a controller
+# immediately after setting it up.
+
+. tests/nvme/rc
+
+DESCRIPTION="test deletion of NVMeOF controllers immediately after setup"
+QUICK=1
+
+requires() {
+	_have_program nvme &&
+	_have_modules loop nvme-loop nvmet &&
+	_have_configfs
+}
+
+test() {
+	local subsys="blktests-subsystem-"
+	local iterations=10
+	local loop_dev
+	local port
+
+	echo "Running ${TEST_NAME}"
+
+	_setup_nvmet
+
+	truncate -s 1G "$TMPDIR/img"
+
+	loop_dev="$(losetup -f --show "$TMPDIR/img")"
+
+	port="$(_create_nvmet_port "loop")"
+
+	for ((i = 0; i < iterations; i++)); do
+		_create_nvmet_subsystem "${subsys}$i" "${loop_dev}"
+		_add_nvmet_subsys_to_port "${port}" "${subsys}$i"
+		nvme connect -t loop -n "${subsys}$i"
+		nvme disconnect -n "${subsys}$i" >> "${FULL}" 2>&1
+		_remove_nvmet_subsystem_from_port "${port}" "${subsys}$i"
+		_remove_nvmet_subsystem "${subsys}$i"
+	done
+
+	_remove_nvmet_port "${port}"
+
+	echo "Test complete"
+}
diff --git a/tests/nvme/031.out b/tests/nvme/031.out
new file mode 100644
index 000000000000..ae902bdd36d4
--- /dev/null
+++ b/tests/nvme/031.out
@@ -0,0 +1,2 @@
+Running nvme/031
+Test complete
--
2.20.1