btrfs-progs: tests: add mkfs test for zone resetting

Add test for mkfs.btrfs zone reset behavior to check if

- it resets all the zones without "-b" option
- it detects an active zone outside of the FS range
- it do not reset a zone outside of the range

Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

tests/mkfs-tests/032-zoned-reset/test.sh

@@ -0,0 +1,43 @@
+#!/bin/bash
+# Verify mkfs for zoned devices support block-group-tree feature
+
+source "$TEST_TOP/common" || exit
+
+check_global_prereq blkzone
+setup_root_helper
+# Create one 128M device with 4M zones, 32 of them
+setup_nullbdevs 1 128 4
+
+prepare_nullbdevs
+
+TEST_DEV="${nullb_devs[1]}"
+last_zone_sector=$(( 4 * 31 * 1024 * 1024 / 512 ))
+# Write some data to the last zone
+run_check $SUDO_HELPER dd if=/dev/urandom of="${TEST_DEV}" bs=1M count=4 seek=$(( 4 * 31 ))
+# Use single as it's supported on more kernels
+run_check $SUDO_HELPER "$TOP/mkfs.btrfs" -f -m single -d single "${TEST_DEV}"
+# Check if the lat zone is empty
+run_check_stdout $SUDO_HELPER blkzone report -o ${last_zone_sector} -c 1 "${TEST_DEV}" | grep -Fq '(em)'
+if [ $? != 0 ]; then
+	_fail "last zone is not empty"
+fi
+
+# Write some data to the last zone
+run_check $SUDO_HELPER dd if=/dev/urandom of="${TEST_DEV}" bs=1M count=1 seek=$(( 4 * 31 ))
+# Create a FS excluding the last zone
+run_mayfail $SUDO_HELPER "$TOP/mkfs.btrfs" -f -b $(( 4 * 31 ))M -m single -d single "${TEST_DEV}"
+if [ $? == 0 ]; then
+	_fail "mkfs.btrfs should detect active zone outside of FS range"
+fi
+
+# Fill the last zone to finish it
+run_check $SUDO_HELPER dd if=/dev/urandom of="${TEST_DEV}" bs=1M count=3 seek=$(( 4 * 31 + 1 ))
+# Create a FS excluding the last zone
+run_mayfail $SUDO_HELPER "$TOP/mkfs.btrfs" -f -b $(( 4 * 31 ))M -m single -d single "${TEST_DEV}"
+# Check if the lat zone is not empty
+run_check_stdout $SUDO_HELPER blkzone report -o ${last_zone_sector} -c 1 "${TEST_DEV}" | grep -Fq '(em)'
+if [ $? == 0 ]; then
+	_fail "last zone is empty"
+fi
+
+cleanup_nullbdevs