support/testing: fs: new erofs runtime test

Signed-off-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>
(cherry picked from commit 21e9bb0967a6534e73138a8e645a5c80fc442b0d)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

DEVELOPERS

@@ -1753,6 +1753,8 @@ F:	support/testing/tests/boot/test_optee_os.py
 F:	support/testing/tests/boot/test_optee_os/
 F:	support/testing/tests/fs/test_btrfs.py
 F:	support/testing/tests/fs/test_btrfs/
+F:	support/testing/tests/fs/test_erofs.py
+F:	support/testing/tests/fs/test_erofs/
 F:	support/testing/tests/package/sample_python_distro.py
 F:	support/testing/tests/package/sample_python_gnupg.py
 F:	support/testing/tests/package/sample_python_hwdata.py

support/testing/tests/fs/test_erofs.py

@@ -0,0 +1,51 @@
+import os
+
+import infra.basetest
+
+
+class TestErofs(infra.basetest.BRTest):
+    kern_frag = \
+        infra.filepath("tests/fs/test_erofs/linux-erofs.fragment")
+    config = \
+        f"""
+        BR2_aarch64=y
+        BR2_TOOLCHAIN_EXTERNAL=y
+        BR2_TARGET_GENERIC_GETTY_PORT="ttyAMA0"
+        BR2_LINUX_KERNEL=y
+        BR2_LINUX_KERNEL_CUSTOM_VERSION=y
+        BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="6.6.46"
+        BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
+        BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="board/qemu/aarch64-virt/linux.config"
+        BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="{kern_frag}"
+        BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
+        BR2_PACKAGE_EROFS_UTILS=y
+        BR2_TARGET_ROOTFS_EROFS=y
+        # BR2_TARGET_ROOTFS_TAR is not set
+        """
+
+    def test_run(self):
+        root_dev = "/dev/vda"
+        disk = os.path.join(self.builddir, "images", "rootfs.erofs")
+        kern = os.path.join(self.builddir, "images", "Image")
+        bootargs = [f"root={root_dev}", "console=ttyAMA0"]
+        qemu_opts = ["-M", "virt", "-cpu", "cortex-a57", "-m", "256M",
+                     "-drive", f"file={disk},if=virtio,format=raw"]
+        self.emulator.boot(arch="aarch64",
+                           kernel=kern,
+                           kernel_cmdline=bootargs,
+                           options=qemu_opts)
+        self.emulator.login()
+
+        # We check our root filesystem is in erofs format.
+        cmd = "mount | grep '/dev/root on / type erofs'"
+        self.assertRunOk(cmd)
+
+        # Since we are on a read-only mounted filesystem, we can run a
+        # check...
+        self.assertRunOk(f"fsck.erofs {root_dev}")
+
+        # We check we can dump the superblock.
+        self.assertRunOk(f"dump.erofs -s {root_dev}")
+
+        # We check we can dump statistics on the image.
+        self.assertRunOk(f"dump.erofs -S {root_dev}")

support/testing/tests/fs/test_erofs/linux-erofs.fragment

@@ -0,0 +1 @@
+CONFIG_EROFS_FS=y