mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Darrick J. Wong
6cef63e668
In this test we try to create a remote symlink block by creating a symlink target buffer large enough to exceed the size of an inode. Unfortunately we don't use the correct block size or symlink header size, which on a 1k block filesystem causes there to be two remote blocks. This causes crc verification errors in xfs_db (because it's too dumb to load both blocks as one like the kernel does) which we don't care about because we're about to corrupt the block anyway. So, fix the block size calculation so that we end up with one block. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Eryu Guan <guaneryu@gmail.com> Signed-off-by: Eryu Guan <guaneryu@gmail.com>
85 lines
2.0 KiB
Bash
Executable File
85 lines
2.0 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (c) 2015 Oracle, Inc. All Rights Reserved.
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#
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# FS QA Test No. 123
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#
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# Create and populate an XFS filesystem, corrupt a long symlink, then see how
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# the kernel and xfs_repair deal with it.
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#
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seq=`basename $0`
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seqres=$RESULT_DIR/$seq
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echo "QA output created by $seq"
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here=`pwd`
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tmp=/tmp/$$
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status=1 # failure is the default!
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trap "_cleanup; exit \$status" 0 1 2 3 15
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_cleanup()
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{
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cd /
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#rm -f $tmp.*
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}
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# get standard environment, filters and checks
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. ./common/rc
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. ./common/filter
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. ./common/attr
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. ./common/populate
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# real QA test starts here
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_supported_fs xfs
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_supported_os Linux
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_require_scratch
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test -n "${FORCE_FUZZ}" || _require_scratch_xfs_crc
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_require_attrs
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_require_populate_commands
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_require_xfs_db_blocktrash_z_command
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test -z "${FUZZ_ARGS}" && FUZZ_ARGS="-n 8 -3"
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rm -f $seqres.full
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echo "+ create scratch fs"
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_scratch_mkfs_xfs > /dev/null
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echo "+ mount fs image"
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_scratch_mount
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blksz=1024
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echo "+ make some files"
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echo "file contents: moo" > "${SCRATCH_MNT}/x"
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reps=$(( (blksz - (56 + 1)) / 2 ))
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str="$(perl -e "print './' x $reps;")x"
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(cd $SCRATCH_MNT; ln -s "${str}" "long_symlink")
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cat "${SCRATCH_MNT}/long_symlink"
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inode="$(stat -c '%i' "${SCRATCH_MNT}/long_symlink")"
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umount "${SCRATCH_MNT}"
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echo "+ check fs"
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_scratch_xfs_repair -n >> $seqres.full 2>&1 || _fail "xfs_repair should not fail"
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echo "+ corrupt image"
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_scratch_xfs_db -x -c "inode ${inode}" -c "dblock 0" -c "stack" -c "blocktrash -x 32 -o 256 -y $((blksz * 4)) -z ${FUZZ_ARGS}" >> $seqres.full
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echo "+ mount image"
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if _try_scratch_mount >> $seqres.full 2>&1; then
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cat "${SCRATCH_MNT}/long_symlink" 2>/dev/null && _fail "symlink should be broken"
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umount "${SCRATCH_MNT}"
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fi
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echo "+ repair fs"
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_scratch_xfs_repair >> $seqres.full 2>&1
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echo "+ mount image (2)"
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_scratch_mount
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cat "${SCRATCH_MNT}/long_symlink" 2>/dev/null && _fail "symlink should be broken"
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umount "${SCRATCH_MNT}"
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echo "+ check fs (2)"
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_scratch_xfs_repair -n >> $seqres.full 2>&1 || _fail "xfs_repair should not fail"
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status=0
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exit
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