btrfs-progs: fsck-tests: add a new test case for squota lowmem false

alerts

The new test script will fill a btrfs with squota enabled:

- A file with regular data extents
- A file with preallocated extents
- Several files with inline extents to bump up the tree level
- Snapshot of a subvolume containing above files

Then run btrfs check to verify no error is found.

Signed-off-by: Qu Wenruo <wqu@suse.com>

Author: adam900710

tests/fsck-tests/073-squota/test.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+#
+# Make sure "btrfs check" can handle EXTENT_OWNER_REF key type for squota
+#
+
+source "$TEST_TOP/common" || exit
+
+check_prereq btrfs
+check_prereq mkfs.btrfs
+check_global_prereq fallocate
+
+if [ ! -f /sys/fs/btrfs/features/simple_quota ] ; then
+	_not_run "no kernel simple quota support"
+fi
+
+setup_root_helper
+prepare_test_dev
+
+run_check_mkfs_test_dev -O squota
+run_check_mount_test_dev
+run_check $SUDO_HELPER "$TOP/btrfs" subvolume create "$TEST_MNT/subv1"
+run_check $SUDO_HELPER dd if=/dev/zero bs=1M count=1 of="$TEST_MNT/subv1/regular"
+run_check $SUDO_HELPER fallocate -l 8m "$TEST_MNT/subv1/preallocated"
+for ((i = 0; i < 64; i++)); do
+	run_check $SUDO_HELPER dd if=/dev/urandom bs=1K count=1 of="$TEST_MNT/subv1/inline_$i"
+done
+
+run_check $SUDO_HELPER "$TOP/btrfs" subvolume snapshot "$TEST_MNT/subv1" "$TEST_MNT/snap1"
+run_check_umount_test_dev
+
+run_check $SUDO_HELPER "$TOP/btrfs" check "$TEST_DEV"