| ##/bin/bash |
| # SPDX-License-Identifier: GPL-2.0+ |
| # Copyright (c) 2017 Oracle. All Rights Reserved. |
| # |
| # Routines for messing around with loadable kernel modules |
| |
| # Return the module name for this fs. |
| _module_for_fs() |
| { |
| echo "${FSTYP}" |
| } |
| |
| # Reload a particular module. This module MUST NOT be the module that |
| # underlies the filesystem. |
| _reload_module() |
| { |
| local module="$1" |
| |
| modprobe -r "${module}" || _fail "${module} unload failed" |
| modprobe "${module}" || _fail "${module} load failed" |
| } |
| |
| # Reload the filesystem module. |
| _reload_fs_module() |
| { |
| local module="$1" |
| |
| # Unload test fs, try to reload module, remount |
| local had_testfs="" |
| local had_scratchfs="" |
| _check_mounted_on TEST_DEV $TEST_DEV TEST_DIR $TEST_DIR && had_testfs="true" |
| _check_mounted_on SCRATCH_DEV $SCRATCH_DEV SCRATCH_MNT $SCRATCH_MNT && had_scratchfs="true" |
| test -n "${had_testfs}" && _test_unmount |
| test -n "${had_scratchfs}" && _scratch_unmount |
| _reload_module "${module}" |
| test -n "${had_scratchfs}" && _scratch_mount 2> /dev/null |
| test -n "${had_testfs}" && _test_mount 2> /dev/null |
| } |
| |
| # Check that we have a module that can be loaded. This module MUST NOT |
| # be the module that underlies the filesystem. |
| _require_loadable_module() |
| { |
| local module="$1" |
| |
| modinfo "${module}" > /dev/null 2>&1 || _notrun "${module}: must be a module." |
| modprobe -r "${module}" || _notrun "Require ${module} to be unloadable" |
| modprobe "${module}" || _notrun "${module} load failed" |
| } |
| |
| # Check that the module for FSTYP can be loaded. |
| _require_loadable_fs_module() |
| { |
| local module="$1" |
| |
| modinfo "${module}" > /dev/null 2>&1 || _notrun "${module}: must be a module." |
| |
| # Unload test fs, try to reload module, remount |
| local had_testfs="" |
| local had_scratchfs="" |
| _check_mounted_on TEST_DEV $TEST_DEV TEST_DIR $TEST_DIR && had_testfs="true" |
| _check_mounted_on SCRATCH_DEV $SCRATCH_DEV SCRATCH_MNT $SCRATCH_MNT && had_scratchfs="true" |
| test -n "${had_testfs}" && _test_unmount |
| test -n "${had_scratchfs}" && _scratch_unmount |
| local unload_ok="" |
| local load_ok="" |
| modprobe -r "${module}" || unload_ok=0 |
| modprobe "${module}" || load_ok=0 |
| test -n "${had_scratchfs}" && _scratch_mount 2> /dev/null |
| test -n "${had_testfs}" && _test_mount 2> /dev/null |
| test -z "${unload_ok}" || _notrun "Require module ${module} to be unloadable" |
| test -z "${load_ok}" || _notrun "${module} load failed" |
| } |
| |
| # Print the value of a filesystem module parameter |
| # at /sys/module/$FSTYP/parameters/$PARAM |
| # |
| # Usage example (FSTYP=overlay): |
| # _get_fs_module_param index |
| _get_fs_module_param() |
| { |
| cat /sys/module/${FSTYP}/parameters/${1} 2>/dev/null |
| } |