btrfs-progs: tests: add 011-delete-missing-device

Test for "btrfs-progs: allow device deletion using 'missing' keyword
again".

Signed-off-by: David Sterba <dsterba@suse.com>

tests/misc-tests/011-delete-missing-device/test.sh

@@ -0,0 +1,82 @@
+#!/bin/bash
+# make sure that 'missing' is accepted for device deletion
+
+source $TOP/tests/common
+
+check_prereq mkfs.btrfs
+check_prereq btrfs
+
+ndevs=4
+declare -a devs
+dev1=
+devtodel=
+
+setup_root_helper
+
+prepare_devices()
+{
+	for i in `seq $ndevs`; do
+		touch img$i
+		chmod a+rw img$i
+		truncate -s0 img$i
+		truncate -s2g img$i
+		devs[$i]=`run_check_stdout $SUDO_HELPER losetup --find --show img$i`
+	done
+}
+
+cleanup_devices()
+{
+	for dev in ${devs[@]}; do
+		run_mayfail $SUDO_HELPER losetup -d $dev
+	done
+	for i in `seq $ndevs`; do
+		truncate -s0 img$i
+	done
+	run_check $SUDO_HELPER losetup --list
+}
+
+test_do_mkfs()
+{
+	run_check $SUDO_HELPER $TOP/mkfs.btrfs -f $@ ${devs[@]}
+	run_check $TOP/btrfs-show-super $dev1
+	run_check $SUDO_HELPER $TOP/btrfs check $dev1
+	run_check $TOP/btrfs filesystem show
+}
+
+test_wipefs()
+{
+	run_check wipefs -a $devtodel
+	run_check $SUDO_HELPER losetup -d $devtodel
+	run_check losetup -a
+	run_check $TOP/btrfs filesystem show
+}
+test_delete_missing()
+{
+	run_check_mount_test_dev -o degraded
+	run_check $SUDO_HELPER $TOP/btrfs filesystem show $TEST_MNT
+	run_check $SUDO_HELPER $TOP/btrfs device delete missing $TEST_MNT
+	run_check $SUDO_HELPER $TOP/btrfs filesystem show $TEST_MNT
+	run_check_umount_test_dev
+
+	run_check_mount_test_dev
+	local out
+	out="$(run_check_stdout $SUDO_HELPER $TOP/btrfs filesystem show $TEST_MNT)"
+	if echo "$out" | grep -q -- "$devtodel"; then
+		_fail "device $devtodel not deleted"
+	fi
+	if echo "$out" | grep -q missing; then
+		_fail "missing device still present"
+	fi
+	run_check_umount_test_dev
+}
+
+prepare_devices
+dev1=${devs[1]}
+devtodel=${devs[3]}
+TEST_DEV=$dev1
+
+test_do_mkfs
+test_wipefs
+test_delete_missing
+
+cleanup_devices