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https://github.com/linux-apfs/apfstests.git
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Darrick J. Wong
f98cc2256b
If the XFS error injection knob directory exists but the knob itself doesn't, then we know that this kernel doesn't support the knob and can skip the test. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Eryu Guan <guaneryu@gmail.com>
140 lines
3.3 KiB
Plaintext
140 lines
3.3 KiB
Plaintext
##/bin/bash
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# SPDX-License-Identifier: GPL-2.0+
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# Copyright (c) 2016 Oracle. All Rights Reserved.
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#
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# Routines for injecting errors into filesystems
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. ./common/log
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# Tests whether $FSTYP is one of the filesystems that supports error injection
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_require_error_injection()
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{
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case "$FSTYP" in
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"xfs")
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grep -q 'debug 1' /proc/fs/xfs/stat || \
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_notrun "XFS error injection requires CONFIG_XFS_DEBUG"
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;;
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*)
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_notrun "Error injection not supported on filesystem type: $FSTYP"
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esac
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}
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# Find the errortag injection knob in sysfs for a given xfs mount's
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# block device.
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_find_xfs_mountdev_errortag_knob()
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{
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dev="$1"
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knob="$2"
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shortdev="$(_short_dev "${dev}")"
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tagfile="/sys/fs/xfs/${shortdev}/errortag/${knob}"
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# Some of the new sysfs errortag knobs were previously available via
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# another sysfs path.
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case "${knob}" in
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"log_bad_crc")
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if [ ! -w "${tagfile}" ]; then
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tagfile="/sys/fs/xfs/${shortdev}/log/log_badcrc_factor"
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fi
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;;
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"drop_writes")
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if [ ! -w "${tagfile}" ]; then
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tagfile="/sys/fs/xfs/${shortdev}/drop_writes"
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fi
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if [ ! -w "${tagfile}" ]; then
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tagfile="/sys/fs/xfs/${shortdev}/fail_writes"
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fi
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;;
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*)
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;;
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esac
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echo "${tagfile}"
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}
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# Requires that xfs_io inject command knows about this error type
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_require_xfs_io_error_injection()
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{
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type="$1"
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_require_error_injection
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# Can we find the error injection knobs via the new errortag
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# configuration mechanism?
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knob="$(_find_xfs_mountdev_errortag_knob "${TEST_DEV}" "${type}")"
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test -w "${knob}" && return
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# If the directory containing the sysfs error injection knob exists
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# but the knob itself isn't usable, this kernel doesn't know about
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# the knob. Skip the test.
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if [ -d "$(dirname "${knob}")" ]; then
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_notrun "XFS error injection $type unknown on this kernel."
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fi
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# NOTE: We can't actually test error injection here because xfs
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# hasn't always range checked the argument to xfs_errortag_add.
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# We also don't want to trip an error before we're ready to deal
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# with it.
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$XFS_IO_PROG -x -c 'inject' $TEST_DIR | grep -q "$type" || \
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_notrun "XFS error injection $type unknown."
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}
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# Inject an error into the test fs
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_test_inject_error()
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{
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type="$1"
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value="$2"
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knob="$(_find_xfs_mountdev_errortag_knob "${TEST_DEV}" "${type}")"
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if [ -w "${knob}" ]; then
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test -z "${value}" && value="default"
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echo -n "${value}" > "${knob}"
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elif [ -z "${value}" ] || [ "${value}" = "default" ]; then
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$XFS_IO_PROG -x -c "inject $type" $TEST_DIR
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else
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_fail "Cannot inject error ${type} value ${value}."
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fi
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}
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# Inject an error into the scratch fs
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_scratch_inject_error()
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{
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type="$1"
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value="$2"
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knob="$(_find_xfs_mountdev_errortag_knob "${SCRATCH_DEV}" "${type}")"
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if [ -w "${knob}" ]; then
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test -z "${value}" && value="default"
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echo -n "${value}" > "${knob}"
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elif [ -z "${value}" ] || [ "${value}" = "default" ]; then
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$XFS_IO_PROG -x -c "inject $type" $SCRATCH_MNT
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else
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_fail "Cannot inject error ${type} value ${value}."
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fi
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}
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# Unmount and remount the scratch device, dumping the log
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_scratch_inject_logprint()
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{
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local opts="$1"
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if test -n "$opts"; then
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opts="-o $opts"
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fi
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_scratch_unmount
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_scratch_dump_log
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_scratch_mount "$opts"
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}
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# Unmount and remount the test device, dumping the log
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_test_inject_logprint()
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{
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local opts="$1"
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if test -n "$opts"; then
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opts="-o $opts"
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fi
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_test_unmount
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_test_dump_log
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_test_mount "$opts"
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}
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