systemd/test/testsuite-23.units/testsuite-23-joins-namespace-of-8.service

# SPDX-License-Identifier: LGPL-2.1-or-later
[Service]
Type=notify
NotifyAccess=all
MountAPIVFS=yes
PrivateTmp=yes
ExecStartPre=test -e /tmp/shared-private-file-x
ExecStartPre=test -e /tmp/hoge
ExecStart=/bin/bash -c 'touch /tmp/shared-private-file-y && systemd-notify --ready && sleep infinity'
test: add tests for JoinsNamespaceOf= To illustrate the current behavior of the dependency. 2023-05-25 00:48:16 +03:00			`# SPDX-License-Identifier: LGPL-2.1-or-later`
			`[Service]`
			`Type=notify`
			`NotifyAccess=all`
			`MountAPIVFS=yes`
			`PrivateTmp=yes`
core/unit: make JoinsNamespaceOf= implies the inverse dependency Previously, even if a.service has JoinsNamespaceOf=b.service, the inverse direction of reference was not introduced. Hence, a.service is started earlier than b.service, the namespace will not shared with b.service. Also, even if a.service had the reference to b.service, b.service did not. If b.service is freed earlier, then unit_clear_dependencies() does not clear the reference from a to b, and will cause use-after-free on unit_free() for a.service. Let's make JoinsNamespaceOf=b.service in a.service implies the inverse dependency, i.e. JoinsNamespaceOf=a.service for b.service. Then, we can safely free b.service. 2023-05-23 00:36:44 +03:00			`ExecStartPre=test -e /tmp/shared-private-file-x`
core/unit: search shared namespace in transitive relation of JoinsNamespaceOf= Previously, dependency chain of JoinsNamespaceOf= did not work, e.g. - a.service has JoinsNamespaceOf=b.service - b.service has JoinsNamespaceOf=c.service if, first c.service, next a.service, finally b.service is started, then a.service is not joined to the namespace of c.service. And, as mentioned in the document, the namespace used by b.service is not deterministic. This makes when searching exsiting namespace to be joined, all units in the transitive dependency of JoinsNamespaceOf= are checked. 2023-05-25 12:08:37 +03:00			`ExecStartPre=test -e /tmp/hoge`
test: add tests for JoinsNamespaceOf= To illustrate the current behavior of the dependency. 2023-05-25 00:48:16 +03:00			`ExecStart=/bin/bash -c 'touch /tmp/shared-private-file-y && systemd-notify --ready && sleep infinity'`