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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2017 Red Hat Inc. All Rights Reserved.
#
# FS QA Test 288
#
# When an attribute leaf block count is 0, xfs_repair should junk
# that leaf directly (as xfsprogs commit f714016).
#
. ./common/preamble
_begin_fstest auto quick repair fuzzers attr
# Import common functions.
. ./common/filter
. ./common/attr
# Modify as appropriate.
_supported_fs xfs
_require_scratch
_require_attrs
# get block size ($dbsize) from the mkfs output
_scratch_mkfs_xfs 2>/dev/null | _filter_mkfs 2>$tmp.mkfs >/dev/null
. $tmp.mkfs
_scratch_mount
touch $SCRATCH_MNT/$seq.attrfile
inum=$(stat -c '%i' $SCRATCH_MNT/$seq.attrfile)
# To get an attr block leaf, we need to extend attr format to extent
# or btree format at least, and the max inode size is half of filesystem
# block size, so write half of block size attr to make sure attr
# out of local format.
maxisize=$((dbsize/2))
$SETFATTR_PROG -n "user.testattr${seq}" \
-v "$(perl -e "print 'v' x ${maxisize};")" \
$SCRATCH_MNT/$seq.attrfile
_scratch_unmount
# manually corrupt the XFS, by set the header count of attr to 0
_scratch_xfs_set_metadata_field "hdr.count" "0" \
"inode $inum" "ablock 0" >> $seqres.full
# verify current xfs_db write command can set hdr.count to 0. Old xfsprogs
# can't do that on v5 filesystems.
count=$(_scratch_xfs_get_metadata_field "hdr.count" \
"inode $inum" "ablock 0" 2> /dev/null)
if [ "$count" != "0" ]; then
_notrun "xfs_db can't set attr hdr.count to 0"
fi
# Check that xfs_repair discards the attr fork if block 0 is an empty leaf
# block. Empty leaf blocks at the start of the xattr data can be a byproduct
# of a shutdown race, and hence are not a corruption.
_scratch_xfs_repair >> $seqres.full 2>&1
# Old xfs_repair maybe find and fix this corruption by
# reset the first used heap value and the usedbytes cnt
# in ablock 0. That's not what we want. So check if
# xfs_repair has junked the whole ablock 0 by xfs_db.
_scratch_xfs_db -x -c "inode $inum" -c "ablock 0" | \
grep -q "no attribute data"
if [ $? -ne 0 ]; then
_fail "xfs_repair didn't junk the empty attr leaf"
fi
echo "Silence is golden"
# success, all done
status=0
exit
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