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@xxxxxxxxxx>
---
common/populate | 44 ++++++++++++++++++++++++++++++++++++++++++++
common/rc | 3 ++-
2 files changed, 46 insertions(+), 1 deletion(-)
diff --git a/common/populate b/common/populate
index 74a77a1..0e6bcfd 100644
--- a/common/populate
+++ b/common/populate
@@ -605,3 +605,47 @@ _scratch_populate() {
;;
esac
}
+
+# 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} 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
+}
diff --git a/common/rc b/common/rc
index 2719b23..e5cffd0 100644
--- a/common/rc
+++ b/common/rc
@@ -413,12 +413,13 @@ _scratch_mkfs_options()
_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()
--
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