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core: make sure to recheck current udev tag "systemd" before considering a device ready 

Let's ensure that a device once tagged can become active/inactive simply
by toggling the current tag.

Note that this means that a device once tagged with "systemd" will
always have a matching .device unit. However, the active/inactive state
of the unit reflects whether it is currently tagged that way (and
doesn't have SYSTEMD_READY=0 set).

Fixes: #7587
This commit is contained in:
Lennart Poettering 2018-12-13 18:32:03 +01:00
parent 31abedbb03
commit 242c1c075a
1 changed files with 4 additions and 0 deletions
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4
src/core/device.c
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@ -736,6 +736,10 @@ static bool device_is_ready(sd_device *dev) {
if (device_is_renaming(dev) > 0)
return false;
/* Is it really tagged as 'systemd' right now? */
if (sd_device_has_current_tag(dev, "systemd") <= 0)
return false;
if (sd_device_get_property_value(dev, "SYSTEMD_READY", &ready) < 0)
return true;