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common/fuzzy: move fuzzing helper functions here

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Move some fuzzing helper functions into a new common/fuzzy file.
We'll add a lot more fuzzing helpers in subsequent patches.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>
This commit is contained in:
Darrick J. Wong
2017-01-21 00:10:50 -08:00
committed by Eryu Guan
parent 7a7463d362
commit dac5feaea7
4 changed files with 82 additions and 35 deletions
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common/populate
-35
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@@ -606,41 +606,6 @@ _scratch_populate() {
esac
}
# Modify various files after a fuzzing operation
_scratch_fuzz_modify() {
nr="$1"
test -z "${nr}" && nr=50000
echo "+++ touch ${nr} files"
blk_sz=$(stat -f -c '%s' ${SCRATCH_MNT})
$XFS_IO_PROG -f -c "pwrite -S 0x63 0 ${blk_sz}" "/tmp/afile" > /dev/null
date="$(date)"
find "${SCRATCH_MNT}/" -type f 2> /dev/null | head -n "${nr}" | while read f; do
setfattr -n "user.date" -v "${date}" "$f"
cat "/tmp/afile" >> "$f"
mv "$f" "$f.longer"
done
sync
rm -rf "/tmp/afile"
echo "+++ create files"
mkdir -p "${SCRATCH_MNT}/test.moo"
$XFS_IO_PROG -f -c 'pwrite -S 0x80 0 65536' "${SCRATCH_MNT}/test.moo/urk"
sync
echo "+++ remove files"
rm -rf "${SCRATCH_MNT}/test.moo"
}
# Try to access files after fuzzing
_scratch_fuzz_test() {
echo "+++ ls -laR" >> $seqres.full
ls -laR "${SCRATCH_MNT}/test.1/" >/dev/null 2>&1
echo "+++ cat files" >> $seqres.full
(find "${SCRATCH_MNT}/test.1/" -type f -size -1048576k -print0 | xargs -0 cat) >/dev/null 2>&1
}
# Fill a file system by repeatedly creating files in the given folder
# starting with the given file size. Files are reduced in size when
# they can no longer fit until no more files can be created.