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device : reload when udev generates a "changed" event

This commit is contained in:
Jérémy Rosen 2017-09-02 11:23:36 +02:00 committed by Jérémy Rosen
parent f54bcca5c1
commit 0ffddc6e2c
2 changed files with 27 additions and 1 deletions
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6
man/systemd.device.xml
View File

@ -83,6 +83,12 @@
the escaping logic used to convert a file system path to a unit
name see
<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
<para>Device units will be reloaded by systemd whenever the
corresponding device generates a <literal>changed</literal> event.
Other units can use <varname>ReloadPropagatedFrom=</varname> to react
to that event</para>
</refsect1>
<refsect1>

22
src/core/device.c
View File

@ -766,7 +766,27 @@ static int device_dispatch_io(sd_event_source *source, int fd, uint32_t revents,
return 0;
}
if (streq(action, "remove")) {
if (streq(action, "change")) {
_cleanup_free_ char *e = NULL;
Unit *u;
r = unit_name_from_path(sysfs, ".device", &e);
if (r < 0)
return log_error_errno(r, "Failed to generate unit name from device path: %m");
u = manager_get_unit(m, e);
if (!u) {
log_error("Failed to get unit from sysfs name.");
return 0;
}
r = manager_add_job(m, JOB_RELOAD, u, JOB_REPLACE, NULL, NULL);
if (r < 0) {
log_error_errno(r, "Failed to add job to manager : %m");
return 0;
}
} else if (streq(action, "remove")) {
r = swap_process_device_remove(m, dev);
if (r < 0)
log_error_errno(r, "Failed to process swap device remove event: %m");