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|
##/bin/bash
# SPDX-License-Identifier: GPL-2.0+
# Copyright (c) 2016 Oracle. All Rights Reserved.
#
# Routines for injecting errors into filesystems
. ./common/log
# Tests whether $FSTYP is one of the filesystems that supports error injection
_require_error_injection()
{
case "$FSTYP" in
"xfs")
grep -q 'debug 1' /proc/fs/xfs/stat || \
_notrun "XFS error injection requires CONFIG_XFS_DEBUG"
;;
*)
_notrun "Error injection not supported on filesystem type: $FSTYP"
esac
}
# Find the errortag injection knob in sysfs for a given xfs mount's
# block device.
_find_xfs_mountdev_errortag_knob()
{
dev="$1"
knob="$2"
shortdev="$(_short_dev "${dev}")"
tagfile="/sys/fs/xfs/${shortdev}/errortag/${knob}"
# Some of the new sysfs errortag knobs were previously available via
# another sysfs path.
case "${knob}" in
"log_bad_crc")
if [ ! -w "${tagfile}" ]; then
tagfile="/sys/fs/xfs/${shortdev}/log/log_badcrc_factor"
fi
;;
"drop_writes")
if [ ! -w "${tagfile}" ]; then
tagfile="/sys/fs/xfs/${shortdev}/drop_writes"
fi
if [ ! -w "${tagfile}" ]; then
tagfile="/sys/fs/xfs/${shortdev}/fail_writes"
fi
;;
*)
;;
esac
echo "${tagfile}"
}
# Requires that xfs_io inject command knows about this error type
_require_xfs_io_error_injection()
{
type="$1"
_require_error_injection
# Can we find the error injection knobs via the new errortag
# configuration mechanism?
knob="$(_find_xfs_mountdev_errortag_knob "${TEST_DEV}" "${type}")"
test -w "${knob}" && return
# If the directory containing the sysfs error injection knob exists
# but the knob itself isn't usable, this kernel doesn't know about
# the knob. Skip the test.
if [ -d "$(dirname "${knob}")" ]; then
_notrun "XFS error injection $type unknown on this kernel."
fi
# NOTE: We can't actually test error injection here because xfs
# hasn't always range checked the argument to xfs_errortag_add.
# We also don't want to trip an error before we're ready to deal
# with it.
$XFS_IO_PROG -x -c 'inject' $TEST_DIR | grep -q "$type" || \
_notrun "XFS error injection $type unknown."
}
# Inject an error into the test fs
_test_inject_error()
{
type="$1"
value="$2"
knob="$(_find_xfs_mountdev_errortag_knob "${TEST_DEV}" "${type}")"
if [ -w "${knob}" ]; then
test -z "${value}" && value="default"
echo -n "${value}" > "${knob}"
elif [ -z "${value}" ] || [ "${value}" = "default" ]; then
$XFS_IO_PROG -x -c "inject $type" $TEST_DIR
else
_fail "Cannot inject error ${type} value ${value}."
fi
}
# Inject an error into the scratch fs
_scratch_inject_error()
{
type="$1"
value="$2"
knob="$(_find_xfs_mountdev_errortag_knob "${SCRATCH_DEV}" "${type}")"
if [ -w "${knob}" ]; then
test -z "${value}" && value="default"
echo -n "${value}" > "${knob}"
elif [ -z "${value}" ] || [ "${value}" = "default" ]; then
$XFS_IO_PROG -x -c "inject $type" $SCRATCH_MNT
else
_fail "Cannot inject error ${type} value ${value}."
fi
}
|
