btrfs-progs: tests: add a test case to check zoned bgt conversion

Add a new test case to make sure:

- btrfstune can convert a zoned btrfs with extent tree to bgt
- btrfstune can convert a zoned btrfs with bgt back to extent tree

Reviewed-by: Johannes Thumshirn <[email protected]>
Reviewed-by: Naohiro Aota <[email protected]>
Signed-off-by: Qu Wenruo <[email protected]>
Signed-off-by: David Sterba <[email protected]>

Author: adam900710

tests/misc-tests/063-btrfstune-zoned-bgt/test.sh

@@ -0,0 +1,55 @@
+#!/bin/bash
+# Verify btrfstune for zoned devices with block-group-tree conversion
+
+source "$TEST_TOP/common" || exit
+
+setup_root_helper
+prepare_test_dev
+
+nullb="$TEST_TOP/nullb"
+# Create one 128M device with 4M zones, 32 of them
+size=128
+zone=4
+
+run_mayfail $SUDO_HELPER "$nullb" setup
+if [ $? != 0 ]; then
+	_not_run "cannot setup nullb environment for zoned devices"
+fi
+
+# Record any other pre-existing devices in case creation fails
+run_check $SUDO_HELPER "$nullb" ls
+
+# Last line has the name of the device node path
+out=$(run_check_stdout $SUDO_HELPER "$nullb" create -s "$size" -z "$zone")
+if [ $? != 0 ]; then
+	_fail "cannot create nullb zoned device $i"
+fi
+dev=$(echo "$out" | tail -n 1)
+name=$(basename "${dev}")
+
+run_check $SUDO_HELPER "$nullb" ls
+
+TEST_DEV="${dev}"
+
+# Create the fs without bgt
+run_check $SUDO_HELPER "$TOP/mkfs.btrfs" -f -m single -d single -O ^block-group-tree "${dev}"
+run_check_mount_test_dev
+run_check $SUDO_HELPER dd if=/dev/zero of="$TEST_MNT"/file1 bs=1M count=1
+run_check $SUDO_HELPER "$TOP/btrfs" filesystem usage -T "$TEST_MNT"
+run_check_umount_test_dev
+
+# Convert to bgt
+run_check $SUDO_HELPER "$TOP/btrfstune" --convert-to-block-group-tree "${dev}"
+run_check_mount_test_dev
+run_check $SUDO_HELPER dd if=/dev/zero of="$TEST_MNT"/file2 bs=1M count=1
+run_check $SUDO_HELPER "$TOP/btrfs" filesystem usage -T "$TEST_MNT"
+run_check_umount_test_dev
+
+# And convert back to old extent tree
+run_check $SUDO_HELPER "$TOP/btrfstune" --convert-from-block-group-tree "${dev}"
+run_check_mount_test_dev
+run_check $SUDO_HELPER dd if=/dev/zero of="$TEST_MNT"/file3 bs=1M count=1
+run_check $SUDO_HELPER "$TOP/btrfs" filesystem usage -T "$TEST_MNT"
+run_check_umount_test_dev
+
+run_check $SUDO_HELPER "$nullb" rm "${name}"