[PATCH v3 3/3] btrfs-progs: tests: Add new logical-resolve test

[Marcos Paulo de Souza <marcos@mpdesouza.com>]

From: Marcos Paulo de Souza <mpdesouza@suse.com>

Signed-off-by: Marcos Paulo de Souza <mpdesouza@suse.com>
---
 .../test.sh                                   | 81 +++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100755 tests/misc-tests/042-inspect-internal-logical-resolve/test.sh

diff --git a/tests/misc-tests/042-inspect-internal-logical-resolve/test.sh b/tests/misc-tests/042-inspect-internal-logical-resolve/test.sh
new file mode 100755
index 00000000..fcf1147f
--- /dev/null
+++ b/tests/misc-tests/042-inspect-internal-logical-resolve/test.sh
@@ -0,0 +1,81 @@
+#!/bin/bash
+# Check if logical-resolve is resolving the paths correctly for different
+# subvolume tree configurations. This used to fail when a child subvolume was
+# mounted without the parent subvolume being accessible.
+
+source "$TEST_TOP/common"
+
+setup_root_helper
+prepare_test_dev
+
+check_prereq btrfs
+check_prereq mkfs.btrfs
+
+check_logical_offset_filename()
+{
+	local filename
+	local offset
+	offset="$1"
+	filename="$2"
+
+	while read file; do
+		if [[ "$file" = *"inode "* ]]; then
+			_log "$file"
+		elif [ ! -f $file ]; then
+			_fail "Path not $file file cannot be accessed"
+		elif [ ! $filename = $file ]; then
+			_fail "logical-resolve failed. Expected $filename but returned $file"
+		else
+			_log "$file"
+		fi
+	done < <($TOP/btrfs inspect-internal logical-resolve "$offset" "$TEST_MNT")
+}
+
+run_check_mkfs_test_dev
+run_check_mount_test_dev
+
+# create top subvolume called '@'
+run_check $SUDO_HELPER "$TOP/btrfs" subvolume create "$TEST_MNT/@"
+
+# create a file in eacch subvolume of @, and each file will have 2 EXTENT_DATA
+# items, and also create a snapshot to have a extent being referenced by two
+# different fs trees
+run_check $SUDO_HELPER "$TOP/btrfs" subvolume create "$TEST_MNT/@/vol1"
+vol1id=$($SUDO_HELPER "$TOP/btrfs" inspect-internal rootid "$TEST_MNT/@/vol1")
+run_check $SUDO_HELPER dd if=/dev/zero bs=1M count=150 of="$TEST_MNT/@/vol1/file1"
+run_check $SUDO_HELPER "$TOP/btrfs" subvolume snapshot "$TEST_MNT/@/vol1" "$TEST_MNT/@/snap1"
+
+run_check $SUDO_HELPER "$TOP/btrfs" subvolume create "$TEST_MNT/@/vol1/subvol1"
+subvol1id=$($SUDO_HELPER "$TOP/btrfs" inspect-internal rootid "$TEST_MNT/@/vol1/subvol1")
+run_check $SUDO_HELPER dd if=/dev/zero bs=1M count=150 of="$TEST_MNT/@/vol1/subvol1/file2"
+run_check $SUDO_HELPER "$TOP/btrfs" subvolume snapshot "$TEST_MNT/@/vol1/subvol1" \
+							"$TEST_MNT/@/vol1/snapshot1"
+
+"$TOP/btrfs" filesystem sync "$TEST_MNT"
+
+run_check_umount_test_dev
+
+# to be used later
+mkdir -p mnt2
+
+$SUDO_HELPER mount -o subvol=/@/vol1 $TEST_DEV "$TEST_MNT"
+# create a bind mount to the vol1. logical-resolve should avoid bind mounts,
+# otherwise the test will fail
+mkdir -p "$TEST_MNT/dir"
+$SUDO_HELPER mount --bind "$TEST_MNT/dir" mnt2
+
+for offset in $("$TOP/btrfs" inspect-internal dump-tree -t "$vol1id" \
+		"$TEST_DEV" | awk '/disk byte/ { print $5 }'); do
+	check_logical_offset_filename "$offset" "$TEST_MNT/file1"
+done
+
+run_check_umount_test_dev mnt2
+run_check_umount_test_dev
+
+$SUDO_HELPER mount -o subvol=/@/vol1/subvol1 $TEST_DEV "$TEST_MNT"
+for offset in $("$TOP/btrfs" inspect-internal dump-tree -t "$subvol1id" \
+		"$TEST_DEV" | awk '/disk byte/ { print $5 }'); do
+	check_logical_offset_filename "$offset" "$TEST_MNT/file2"
+done
+
+run_check_umount_test_dev
-- 
2.26.2