[PATCH 2/3] test: py: test mount/unmount of pstore file system

[Ahmad Fatoum <a.fatoum@barebox.org>]

The file system internals were recently touched to enable easier porting
of the 9P file system. This led to regressions[1][2] that broke
unmounting a volumes.

Add a simple regression test that would have caught the two described
issues.

[1]: a3ef153fdf26 ("fs: unreference path on file close")
[2]: aef3b0134519 ("fs: unreference path in canonicalize_path()")

Signed-off-by: Ahmad Fatoum <a.fatoum@barebox.org>
---
 arch/arm/configs/multi_v5_v6_defconfig |  1 +
 arch/arm/configs/multi_v7_defconfig    |  1 +
 arch/arm/configs/multi_v8_defconfig    |  1 +
 test/py/test_mount.py                  | 21 +++++++++++++++++++++
 4 files changed, 24 insertions(+)
 create mode 100644 test/py/test_mount.py

diff --git a/arch/arm/configs/multi_v5_v6_defconfig b/arch/arm/configs/multi_v5_v6_defconfig
index 2afc072e129c..91d3a63e85ab 100644
--- a/arch/arm/configs/multi_v5_v6_defconfig
+++ b/arch/arm/configs/multi_v5_v6_defconfig
@@ -38,6 +38,7 @@ CONFIG_CMD_GO=y
 CONFIG_CMD_RESET=y
 CONFIG_CMD_UIMAGE=y
 CONFIG_CMD_PARTITION=y
+CONFIG_CMD_FINDMNT=y
 CONFIG_CMD_UBIFORMAT=y
 CONFIG_CMD_EXPORT=y
 CONFIG_CMD_LOADENV=y
diff --git a/arch/arm/configs/multi_v7_defconfig b/arch/arm/configs/multi_v7_defconfig
index 4fb696a10626..726afe8ce6c5 100644
--- a/arch/arm/configs/multi_v7_defconfig
+++ b/arch/arm/configs/multi_v7_defconfig
@@ -143,6 +143,7 @@ CONFIG_CMD_RESET=y
 CONFIG_CMD_UIMAGE=y
 CONFIG_CMD_BOOTCHOOSER=y
 CONFIG_CMD_PARTITION=y
+CONFIG_CMD_FINDMNT=y
 CONFIG_CMD_UBIFORMAT=y
 CONFIG_CMD_EXPORT=y
 CONFIG_CMD_DEFAULTENV=y
diff --git a/arch/arm/configs/multi_v8_defconfig b/arch/arm/configs/multi_v8_defconfig
index 3d3f3254df20..a487d331d04e 100644
--- a/arch/arm/configs/multi_v8_defconfig
+++ b/arch/arm/configs/multi_v8_defconfig
@@ -89,6 +89,7 @@ CONFIG_CMD_RESET=y
 CONFIG_CMD_UIMAGE=y
 CONFIG_CMD_BOOTCHOOSER=y
 CONFIG_CMD_PARTITION=y
+CONFIG_CMD_FINDMNT=y
 CONFIG_CMD_EXPORT=y
 CONFIG_CMD_DEFAULTENV=y
 CONFIG_CMD_LOADENV=y
diff --git a/test/py/test_mount.py b/test/py/test_mount.py
new file mode 100644
index 000000000000..33608a3b6ddb
--- /dev/null
+++ b/test/py/test_mount.py
@@ -0,0 +1,21 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+from .helper import skip_disabled
+
+
+def test_findmnt_umount(barebox, barebox_config):
+    skip_disabled(barebox_config, "CONFIG_CMD_FINDMNT")
+
+    barebox.run_check("mount -t ramfs none /tmp")
+    findmnt_out1 = barebox.run_check("findmnt /tmp")
+    barebox.run_check("umount /tmp")
+
+    assert len(findmnt_out1) == 2
+
+
+def test_echo_umount(barebox):
+    barebox.run_check("mount -t ramfs none /tmp")
+    barebox.run_check("echo -o /tmp/file test")
+    barebox.run_check("umount /tmp")
+
+    # Nothing to assert, we are happy if this is reached without exception
-- 
2.39.5