diff options
| author | Franck Bui <fbui@suse.com> | 2020-11-19 09:17:19 +0100 |
|---|---|---|
| committer | Franck Bui <fbui@suse.com> | 2020-11-19 11:50:52 +0100 |
| commit | 42cc2855ba2fe4c6f5dc863507a1c843611350a0 (patch) | |
| tree | 1bc5453f902b61e39914b4a4f69a1343e71eaf0d /units/sys-kernel-config.mount | |
| parent | b3e32582f67c68896b6b05893b138a975fa26454 (diff) | |
| download | systemd-42cc2855ba2fe4c6f5dc863507a1c843611350a0.tar.gz | |
units: wait until some fs modules are entirely loaded before mounting their corresponding filesystem
udev requests to start the fs mount units when their respective module is
loaded. For that it monitors uevents of type "ADD" for the relevant fs modules.
However the uevent is sent by the kernel too early, ie before the init() of the
module is called hence before directories in /sys/fs/ are created.
This patch workarounds adds "Requires/After=modprobe@<fs-module>.service" to
the mount unit, which means that modprobe(8) will be called once the fs module
is announced to be loaded. This sounds pointless, but given that modprobe only
returns after the initialization of the module is complete, it should
workaround the issue.
As a side effect, the module will be automatically loaded if the mount unit is
started manually.
Fixes #17586.
Diffstat (limited to 'units/sys-kernel-config.mount')
| -rw-r--r-- | units/sys-kernel-config.mount | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/units/sys-kernel-config.mount b/units/sys-kernel-config.mount index 001c7b57cc..7d965046ee 100644 --- a/units/sys-kernel-config.mount +++ b/units/sys-kernel-config.mount @@ -12,11 +12,17 @@ Description=Kernel Configuration File System Documentation=https://www.kernel.org/doc/Documentation/filesystems/configfs/configfs.txt Documentation=https://www.freedesktop.org/wiki/Software/systemd/APIFileSystems DefaultDependencies=no -ConditionPathExists=/sys/kernel/config ConditionCapability=CAP_SYS_RAWIO -After=systemd-modules-load.service Before=sysinit.target +# These dependencies are used to make certain that the module is fully +# loaded. Indeed udev starts this unit when it receives an uevent for the +# module but the kernel sends it too early, ie before the init() of the module +# is fully operational and /sys/kernel/config is created, see issue#17586. + +After=modprobe@configfs.service +Requires=modprobe@configfs.service + [Mount] What=configfs Where=/sys/kernel/config |