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populate: cache scratch metadata images

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Create a helper function to create a populated FS image and dump the
metadata into a file on the test device, with the purpose of allowing
future (fuzzer) invocations of _populate_fs use the cached metadata to
save time.

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 00:10:58 -08:00
committed by Eryu Guan
parent dac5feaea7
commit d6445ed41a
2 changed files with 46 additions and 1 deletions
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common/populate
+44
View File
@@ -673,3 +673,47 @@ _fill_fs()
file_count=$((file_count + 1))
done
}
# Populate a scratch FS from scratch or from a cached image.
_scratch_populate_cached() {
POPULATE_METADUMP="${TEST_DIR}/__populate.${FSTYP}"
POPULATE_METADUMP_DESCR="${TEST_DIR}/__populate.${FSTYP}.txt"
# Don't keep metadata images cached for more 48 hours...
rm -rf "$(find "${POPULATE_METADUMP}" -mtime +2 2>/dev/null)"
# Throw away cached image if it doesn't match our spec.
meta_descr="FSTYP ${FSTYP} MKFS_OPTIONS ${MKFS_OPTIONS} SIZE $(blockdev --getsz "${SCRATCH_DEV}") ARGS $@"
cmp -s "${POPULATE_METADUMP_DESCR}" <(echo "${meta_descr}") || rm -rf "${POPULATE_METADUMP}"
# Do we have a cached image?
if [ -r "${POPULATE_METADUMP}" ]; then
case "${FSTYP}" in
"xfs")
xfs_mdrestore "${POPULATE_METADUMP}" "${SCRATCH_DEV}" && return
;;
"ext2"|"ext3"|"ext4")
e2image -r "${POPULATE_METADUMP}" "${SCRATCH_DEV}" && return
;;
esac
fi
# Oh well, just create one from scratch
_scratch_mkfs
echo "${meta_descr}" > "${POPULATE_METADUMP_DESCR}"
case "${FSTYP}" in
"xfs")
_scratch_xfs_populate $@
_scratch_xfs_populate_check
_scratch_metadump "${POPULATE_METADUMP}" -a -o
;;
"ext2"|"ext3"|"ext4")
_scratch_ext4_populate $@
_scratch_ext4_populate_check
e2image -Q "${SCRATCH_DEV}" "${POPULATE_METADUMP}"
;;
*)
_fail "Don't know how to populate a ${FSTYP} filesystem."
;;
esac
}
common/rc
+2 -1
View File
@@ -471,12 +471,13 @@ _scratch_do_mkfs()
_scratch_metadump()
{
dumpfile=$1
shift
options=
[ "$USE_EXTERNAL" = yes -a ! -z "$SCRATCH_LOGDEV" ] && \
options="-l $SCRATCH_LOGDEV"
xfs_metadump $options $SCRATCH_DEV $dumpfile
xfs_metadump $options "$@" $SCRATCH_DEV $dumpfile
}
_setup_large_ext4_fs()