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##/bin/bash
# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright (c) 2024 Oracle. All Rights Reserved.
#
# Filesystem metadata dump testing functions.
#
# Set up environment variables for a metadump test. Requires the test and
# scratch devices. Sets XFS_METADUMP_{FILE,IMG} and MAX_XFS_METADUMP_VERSION.
_xfs_setup_verify_metadump()
{
XFS_METADUMP_FILE="$TEST_DIR/${seq}_metadump"
XFS_METADUMP_IMG="$TEST_DIR/${seq}_image"
MAX_XFS_METADUMP_VERSION="$(_xfs_metadump_max_version)"
rm -f "$XFS_METADUMP_FILE" "$XFS_METADUMP_IMG"*
}
_xfs_cleanup_verify_metadump()
{
local img
_scratch_unmount &>> $seqres.full
test -n "$XFS_METADUMP_FILE" && rm -f "$XFS_METADUMP_FILE"
if [ -n "$XFS_METADUMP_IMG" ]; then
losetup -n -a -O BACK-FILE,NAME | grep "^$XFS_METADUMP_IMG" | while read backing ldev; do
losetup -d "$ldev"
done
# Don't call rm directly with a globbed argument here to avoid
# issues issues with variable expansions.
for img in "$XFS_METADUMP_IMG"*; do
test -e "$img" && rm -f "$img"
done
fi
}
# Can xfs_metadump snapshot the fs metadata to a v1 metadump file?
_scratch_xfs_can_metadump_v1()
{
# metadump v1 does not support log devices
[ "$USE_EXTERNAL" = yes ] && [ -n "$SCRATCH_LOGDEV" ] && return 1
# metadump v1 does not support realtime devices
[ "$USE_EXTERNAL" = yes ] && [ -n "$SCRATCH_RTDEV" ] && return 1
return 0
}
# Can xfs_metadump snapshot the fs metadata to a v2 metadump file?
_scratch_xfs_can_metadump_v2()
{
test "$MAX_XFS_METADUMP_VERSION" -ge 2
}
# Create a metadump in v1 format, restore it to fs image files, then mount the
# images and fsck them.
_xfs_verify_metadump_v1()
{
local metadump_args="$1"
local extra_test="$2"
local metadump_file="$XFS_METADUMP_FILE"
local version=""
local data_img="$XFS_METADUMP_IMG.data"
local data_loop
# Force v1 if we detect v2 support
if [[ $MAX_XFS_METADUMP_FORMAT > 1 ]]; then
version="-v 1"
fi
# Capture metadump, which creates metadump_file
_scratch_xfs_metadump $metadump_file $metadump_args $version
# Restore metadump, which creates data_img
SCRATCH_DEV=$data_img _scratch_xfs_mdrestore $metadump_file
# Create loopdev for data device so we can mount the fs
data_loop=$(_create_loop_device $data_img)
# Mount fs, run an extra test, fsck, and unmount
SCRATCH_DEV=$data_loop _scratch_mount
if [ -n "$extra_test" ]; then
SCRATCH_DEV=$data_loop $extra_test
fi
SCRATCH_DEV=$data_loop _check_xfs_scratch_fs
SCRATCH_DEV=$data_loop _scratch_unmount
# Tear down what we created
_destroy_loop_device $data_loop
rm -f $data_img
}
# Create a metadump in v2 format, restore it to fs image files, then mount the
# images and fsck them.
_xfs_verify_metadump_v2()
{
local metadump_args="$1"
local extra_test="$2"
local metadump_file="$XFS_METADUMP_FILE"
local version="-v 2"
local data_img="$XFS_METADUMP_IMG.data"
local data_loop
local log_img=""
local log_loop
# Capture metadump, which creates metadump_file
_scratch_xfs_metadump $metadump_file $metadump_args $version
#
# Metadump v2 files can contain contents dumped from an external log
# device. Use a temporary file to hold the log device contents restored
# from such a metadump file.
test -n "$SCRATCH_LOGDEV" && log_img="$XFS_METADUMP_IMG.log"
# Restore metadump, which creates data_img and log_img
SCRATCH_DEV=$data_img SCRATCH_LOGDEV=$log_img \
_scratch_xfs_mdrestore $metadump_file
# Create loopdev for data device so we can mount the fs
data_loop=$(_create_loop_device $data_img)
# Create loopdev for log device if we recovered anything
test -s "$log_img" && log_loop=$(_create_loop_device $log_img)
# Mount fs, run an extra test, fsck, and unmount
SCRATCH_DEV=$data_loop SCRATCH_LOGDEV=$log_loop _scratch_mount
if [ -n "$extra_test" ]; then
SCRATCH_DEV=$data_loop SCRATCH_LOGDEV=$log_loop $extra_test
fi
SCRATCH_DEV=$data_loop SCRATCH_LOGDEV=$log_loop _check_xfs_scratch_fs
SCRATCH_DEV=$data_loop _scratch_unmount
# Tear down what we created
if [ -b "$log_loop" ]; then
_destroy_loop_device $log_loop
rm -f $log_img
fi
_destroy_loop_device $data_loop
rm -f $data_img
}
# Verify both metadump formats if possible
_xfs_verify_metadumps()
{
_scratch_xfs_can_metadump_v1 && _xfs_verify_metadump_v1 "$@"
_scratch_xfs_can_metadump_v2 && _xfs_verify_metadump_v2 "$@"
}
|
