oeqa/selftest: overlayfs unit tests

Unit tests for overlayfs.bbclass

(From OE-Core rev: b393e1982090063d9d0610fdcfd3601e78a501c0)

Signed-off-by: Vyacheslav Yurkov <uvv.mail@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oeqa/selftest/cases/overlayfs.py

@@ -0,0 +1,171 @@
+#
+# SPDX-License-Identifier: MIT
+#
+
+from oeqa.selftest.case import OESelftestTestCase
+from oeqa.utils.commands import runCmd, bitbake, get_bb_var, runqemu
+
+class OverlayFSTests(OESelftestTestCase):
+    """Overlayfs class usage tests"""
+
+    def getline(self, res, line):
+        for l in res.output.split('\n'):
+            if line in l:
+                return l
+
+    def add_overlay_conf_to_machine(self):
+        machine_inc = """
+OVERLAYFS_MOUNT_POINT[mnt-overlay] = "/mnt/overlay"
+"""
+        self.set_machine_config(machine_inc)
+
+    def test_distro_features_missing(self):
+        """
+        Summary:   Check that required DISTRO_FEATURES are set
+        Expected:  Fail when either systemd or overlayfs are not in DISTRO_FEATURES
+        Author:    Vyacheslav Yurkov <uvv.mail@gmail.com>
+        """
+
+        config = """
+IMAGE_INSTALL:append = " overlayfs-user"
+"""
+        overlayfs_recipe_append = """
+inherit overlayfs
+"""
+        self.write_config(config)
+        self.add_overlay_conf_to_machine()
+        self.write_recipeinc('overlayfs-user', overlayfs_recipe_append)
+
+        res = bitbake('core-image-minimal', ignore_status=True)
+        line = self.getline(res, "overlayfs-user was skipped: missing required distro features")
+        self.assertTrue("overlayfs" in res.output, msg=res.output)
+        self.assertTrue("systemd" in res.output, msg=res.output)
+        self.assertTrue("ERROR: Required build target 'core-image-minimal' has no buildable providers." in res.output, msg=res.output)
+
+    def test_not_all_units_installed(self):
+        """
+        Summary:   Test QA check that we have required mount units in the image
+        Expected:  Fail because mount unit for overlay partition is not installed
+        Author:    Vyacheslav Yurkov <uvv.mail@gmail.com>
+        """
+
+        config = """
+IMAGE_INSTALL:append = " overlayfs-user"
+DISTRO_FEATURES += "systemd overlayfs"
+"""
+
+        self.write_config(config)
+        self.add_overlay_conf_to_machine()
+
+        res = bitbake('core-image-minimal', ignore_status=True)
+        line = self.getline(res, "Unit name mnt-overlay.mount not found in systemd unit directories")
+        self.assertTrue(line and line.startswith("WARNING:"), msg=res.output)
+        line = self.getline(res, "Not all mount units are installed by the BSP")
+        self.assertTrue(line and line.startswith("ERROR:"), msg=res.output)
+
+    def test_mount_unit_not_set(self):
+        """
+        Summary:   Test whether mount unit was set properly
+        Expected:  Fail because mount unit was not set
+        Author:    Vyacheslav Yurkov <uvv.mail@gmail.com>
+        """
+
+        config = """
+IMAGE_INSTALL:append = " overlayfs-user"
+DISTRO_FEATURES += "systemd overlayfs"
+"""
+
+        self.write_config(config)
+
+        res = bitbake('core-image-minimal', ignore_status=True)
+        line = self.getline(res, "A recipe uses overlayfs class but there is no OVERLAYFS_MOUNT_POINT set in your MACHINE configuration")
+        self.assertTrue(line and line.startswith("Parsing recipes...ERROR:"), msg=res.output)
+
+    def test_wrong_mount_unit_set(self):
+        """
+        Summary:   Test whether mount unit was set properly
+        Expected:  Fail because not the correct flag used for mount unit
+        Author:    Vyacheslav Yurkov <uvv.mail@gmail.com>
+        """
+
+        config = """
+IMAGE_INSTALL:append = " overlayfs-user"
+DISTRO_FEATURES += "systemd overlayfs"
+"""
+
+        wrong_machine_config = """
+OVERLAYFS_MOUNT_POINT[usr-share-overlay] = "/usr/share/overlay"
+"""
+
+        self.write_config(config)
+        self.set_machine_config(wrong_machine_config)
+
+        res = bitbake('core-image-minimal', ignore_status=True)
+        line = self.getline(res, "Missing required mount point for OVERLAYFS_MOUNT_POINT[mnt-overlay] in your MACHINE configuration")
+        self.assertTrue(line and line.startswith("Parsing recipes...ERROR:"), msg=res.output)
+
+    def test_correct_image(self):
+        """
+        Summary:   Check that we can create an image when all parameters are
+                   set correctly
+        Expected:  Image is created successfully
+        Author:    Vyacheslav Yurkov <uvv.mail@gmail.com>
+        """
+
+        config = """
+IMAGE_INSTALL:append = " overlayfs-user systemd-machine-units"
+DISTRO_FEATURES += "systemd overlayfs"
+
+# Use systemd as init manager
+VIRTUAL-RUNTIME_init_manager = "systemd"
+
+# enable overlayfs in the kernel
+KERNEL_EXTRA_FEATURES:append = " features/overlayfs/overlayfs.scc"
+"""
+
+        systemd_machine_unit_append = """
+SYSTEMD_SERVICE:${PN} += " \
+    mnt-overlay.mount \
+"
+
+do_install:append() {
+    install -d ${D}${systemd_system_unitdir}
+    cat <<EOT > ${D}${systemd_system_unitdir}/mnt-overlay.mount
+[Unit]
+Description=Tmpfs directory
+DefaultDependencies=no
+
+[Mount]
+What=tmpfs
+Where=/mnt/overlay
+Type=tmpfs
+Options=mode=1777,strictatime,nosuid,nodev
+
+[Install]
+WantedBy=multi-user.target
+EOT
+}
+
+"""
+
+        self.write_config(config)
+        self.add_overlay_conf_to_machine()
+        self.write_recipeinc('systemd-machine-units', systemd_machine_unit_append)
+
+        bitbake('core-image-minimal')
+
+        def getline_qemu(out, line):
+            for l in out.split('\n'):
+                if line in l:
+                    return l
+
+        with runqemu('core-image-minimal') as qemu:
+            # Check that we have /mnt/overlay fs mounted as tmpfs and
+            # /usr/share/my-application as an overlay (see overlayfs-user recipe)
+            status, output = qemu.run_serial("/bin/mount -t tmpfs,overlay")
+
+            line = getline_qemu(output, "on /mnt/overlay")
+            self.assertTrue(line and line.startswith("tmpfs"), msg=output)
+
+            line = getline_qemu(output, "upperdir=/mnt/overlay/upper/usr/share/my-application")
+            self.assertTrue(line and line.startswith("overlay"), msg=output)