CoCalc -- sysctl_security_jail

GitHub Repository: freebsd/freebsd-src
Path: blob/main/tests/sys/kern/sysctl_security_jail_children.sh
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#
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# SPDX-License-Identifier: BSD-2-Clause
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#
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# Copyright (c) 2024 Igor Ostapenko <[email protected]>
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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#    notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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#    notice, this list of conditions and the following disclaimer in the
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#    documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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atf_test_case "max_cur" "cleanup"
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max_cur_head()
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{
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	atf_set descr 'Test maximum and current number of child jails'
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	atf_set require.user root
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	atf_set execenv jail
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}
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max_cur_body()
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{
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	origin_max=$(sysctl -n security.jail.children.max)
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	origin_cur=$(sysctl -n security.jail.children.cur)
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	# Magic numbers reasoning:
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	# 3 stands for:
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	#   - the test creates three jails: childfree, maxallowed, maxallowed.family
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	# 6 stands for:
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	#   - maxallowed.family wants to set children.max=4
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	#   - it means that its parent (maxallowed) should have at least children.max=5
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	#   - it makes the origin (parent of maxallowed) provide children.max=6 minimum
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	#
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	test $origin_cur -le $origin_max || atf_fail "Abnormal cur=$origin_cur > max=$origin_max."
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	test $((origin_max - origin_cur)) -ge 3 || atf_skip "Not enough child jails are allowed for the test."
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	test $origin_max -ge 6 || atf_skip "Not high enough children.max limit for the test."
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	jail -c name=childfree persist
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	atf_check_equal "$((origin_cur + 1))" "$(sysctl -n security.jail.children.cur)"
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	atf_check_equal "0" "$(jexec childfree sysctl -n security.jail.children.max)"
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	atf_check_equal "0" "$(jexec childfree sysctl -n security.jail.children.cur)"
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	jail -c name=maxallowed children.max=$((origin_max - 1)) persist
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	atf_check_equal "$((origin_cur + 2))" "$(sysctl -n security.jail.children.cur)"
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	atf_check_equal "$((origin_max - 1))" "$(jexec maxallowed sysctl -n security.jail.children.max)"
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	atf_check_equal "0" "$(jexec maxallowed sysctl -n security.jail.children.cur)"
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	jexec maxallowed jail -c name=family children.max=4 persist
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	atf_check_equal "$((origin_cur + 3))" "$(sysctl -n security.jail.children.cur)"
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	atf_check_equal "1" "$(jexec maxallowed sysctl -n security.jail.children.cur)"
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	atf_check_equal "4" "$(jexec maxallowed.family sysctl -n security.jail.children.max)"
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	atf_check_equal "0" "$(jexec maxallowed.family sysctl -n security.jail.children.cur)"
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}
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max_cur_cleanup()
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{
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	jail -r maxallowed
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	jail -r childfree
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	return 0
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}
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atf_init_test_cases()
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{
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	atf_add_test_case "max_cur"
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}
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