tools/testing/selftests/kmod/kmod.sh

Source file repositories/reference/linux-study-clean/tools/testing/selftests/kmod/kmod.sh

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/kmod/kmod.sh
Extension
.sh
Size
15353 bytes
Lines
679
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: tools
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

#!/bin/bash
# SPDX-License-Identifier: GPL-2.0-or-later OR copyleft-next-0.3.1
# Copyright (C) 2017 Luis R. Rodriguez <mcgrof@kernel.org>
#
# This is a stress test script for kmod, the kernel module loader. It uses
# test_kmod which exposes a series of knobs for the API for us so we can
# tweak each test in userspace rather than in kernelspace.
#
# The way kmod works is it uses the kernel's usermode helper API to eventually
# call /sbin/modprobe. It has a limit of the number of concurrent calls
# possible. The kernel interface to load modules is request_module(), however
# mount uses get_fs_type(). Both behave slightly differently, but the
# differences are important enough to test each call separately. For this
# reason test_kmod starts by providing tests for both calls.
#
# The test driver test_kmod assumes a series of defaults which you can
# override by exporting to your environment prior running this script.
# For instance this script assumes you do not have xfs loaded upon boot.
# If this is false, export DEFAULT_KMOD_FS="ext4" prior to running this
# script if the filesystem module you don't have loaded upon bootup
# is ext4 instead. Refer to allow_user_defaults() for a list of user
# override variables possible.
#
# You'll want at least 4 GiB of RAM to expect to run these tests
# without running out of memory on them. For other requirements refer
# to test_reqs()

set -e

TEST_NAME="kmod"
TEST_DRIVER="test_${TEST_NAME}"
TEST_DIR=$(dirname $0)

# This represents
#
# TEST_ID:TEST_COUNT:ENABLED
#
# TEST_ID: is the test id number
# TEST_COUNT: number of times we should run the test
# ENABLED: 1 if enabled, 0 otherwise
#
# Once these are enabled please leave them as-is. Write your own test,
# we have tons of space.
ALL_TESTS="0001:3:1"
ALL_TESTS="$ALL_TESTS 0002:3:1"
ALL_TESTS="$ALL_TESTS 0003:1:1"
ALL_TESTS="$ALL_TESTS 0004:1:1"
ALL_TESTS="$ALL_TESTS 0005:10:1"
ALL_TESTS="$ALL_TESTS 0006:10:1"
ALL_TESTS="$ALL_TESTS 0007:5:1"
ALL_TESTS="$ALL_TESTS 0008:150:1"
ALL_TESTS="$ALL_TESTS 0009:150:1"
ALL_TESTS="$ALL_TESTS 0010:1:1"
ALL_TESTS="$ALL_TESTS 0011:1:1"
ALL_TESTS="$ALL_TESTS 0012:1:1"
ALL_TESTS="$ALL_TESTS 0013:1:1"

# Kselftest framework requirement - SKIP code is 4.
ksft_skip=4

test_modprobe()
{
       if [ ! -d $DIR ]; then
               echo "$0: $DIR not present" >&2
               echo "You must have the following enabled in your kernel:" >&2
               cat $TEST_DIR/config >&2
               exit $ksft_skip
       fi
}

Annotation

Implementation Notes