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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2015 Red Hat, Inc. All Rights Reserved.
#
# FS QA Test 077
#
# test UUID modification of CRC-enabled filesystems
#
# CRC-enabled / V5 superblock filesystems have a UUID stamped into
# every piece of metadata, and a mechanism was added later to allow
# changing the user-visible UUID by copying the original UUID (which
# matches all the existing metadata) to a new superblock location.
# Exercise some of that behavior.
#
. ./common/preamble
_begin_fstest auto quick copy
# Import common functions.
. ./common/filter
# real QA test starts here
_supported_fs xfs
_require_xfs_copy
_require_scratch
_require_no_large_scratch_dev
_require_xfs_crc
_require_meta_uuid
# Takes 2 args, 2nd optional:
# 1: generate, rewrite, or restore
# 2: Expected UUID after the action. Blank if new uuid generated
# After the action check the fs, and make sure it can be mounted
# Sets NEW_UUID to the resulting UUID.
_test_uuid()
{
ACTION=$1
EXPECTED_UUID=$2
_scratch_xfs_db -x -c "uuid $ACTION" \
| _filter_uuid $EXPECTED_UUID
NEW_UUID=`_scratch_xfs_db -c "uuid" | awk '{print $NF}'`
_check_scratch_fs
_try_scratch_mount || _fail "Mount failed after UUID $ACTION"
_scratch_unmount
}
_fs_has_META_UUID()
{
FS=$1
$XFS_DB_PROG -r -c version $FS | grep -q META_UUID
}
_scratch_mkfs_xfs -m crc=1 >> $seqres.full 2>&1 || _fail "mkfs failed"
ORIG_UUID=`_scratch_xfs_db -c "uuid" | awk '{print $NF}'`
_scratch_mount
# Put some stuff on the fs
$FSSTRESS_PROG -d $SCRATCH_MNT -n 100 -p 4 >> $seqres.full 2>&1
_scratch_unmount
# Can xfs_db change it?
echo "== Generate new UUID"
_test_uuid generate
[ "$NEW_UUID" == "$ORIG_UUID" ] && _fail "Failed to change UUID"
_fs_has_META_UUID $SCRATCH_DEV || _fail "META_UUID feature not set"
# This should be a no-op
echo "== Rewrite UUID"
_test_uuid rewrite $NEW_UUID
_fs_has_META_UUID $SCRATCH_DEV || _fail "META_UUID feature not set"
# Can we change it back?
echo "== Restore old UUID"
_test_uuid restore $ORIG_UUID
[ "$NEW_UUID" != "$ORIG_UUID" ] && _fail "Failed to restore UUID"
_fs_has_META_UUID $SCRATCH_DEV && _fail "META_UUID feature should not be not set"
# This should be a no-op too.
echo "== Rewrite UUID"
_test_uuid rewrite $ORIG_UUID
_fs_has_META_UUID $SCRATCH_DEV && _fail "META_UUID feature should not be not set"
# Ok, now what does xfs_copy do; it changes UUID by default
IMGFILE=$TEST_DIR/$seq.copy.img
rm -f $IMGFILE
# xfs_copy changes the UUID by default
echo "== xfs_copy with new UUID"
$XFS_COPY_PROG $SCRATCH_DEV $IMGFILE 2>&1 >> $seqres.full || \
_fail "xfs_copy (new UUID) failed"
_check_xfs_filesystem $IMGFILE none none || _fail "Copy looks corrupted"
# The copy should have META_UUID feature set
_fs_has_META_UUID $IMGFILE || _fail "META_UUID feature not set on copy"
_try_scratch_mount || _fail "Mount failed after UUID rewrite"
_scratch_unmount
rm -f $IMGFILE
# duplicating the UUID should be fine too
echo "== xfs_copy with duplicate UUID"
$XFS_COPY_PROG -d $SCRATCH_DEV $IMGFILE 2>&1 >> $seqres.full || \
_fail "xfs_copy (duplicate) failed"
_check_xfs_filesystem $IMGFILE none none || _fail "Duplicate copy looks corrupted"
# The copy should not have META_UUID feature set
_fs_has_META_UUID $IMGFILE && _fail "META_UUID feature should not be set on copy"
# success, all done
status=0
exit
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