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alsa: remove device if inotify reports it's no longer accessible

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When the session becomes inactive (eg. user on active seat switched),
udev may make devices inaccessible.  In this case, pipewire should give
up the devices and close their open file descriptors.
This commit is contained in:
Pauli Virtanen 2021-04-11 14:00:48 +03:00 • committed by Wim Taymans
parent 277a9a2577
commit bf3b5d4286
1 changed files with 15 additions and 1 deletions
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16
spa/plugins/alsa/alsa-udev.c
View file

@ -49,6 +49,7 @@
#define ACTION_ADD 0
#define ACTION_REMOVE 1
#define ACTION_DISABLE 2
struct device {
uint32_t id;
@ -415,6 +416,15 @@ static void process_device(struct impl *this, uint32_t action, struct udev_devic
if (emitted)
spa_device_emit_object_info(&this->hooks, id, NULL);
break;
case ACTION_DISABLE:
if (device == NULL)
return;
if (device->emitted) {
device->emitted = false;
spa_device_emit_object_info(&this->hooks, id, NULL);
}
break;
}
}
@ -459,12 +469,16 @@ static void impl_on_notify_events(struct spa_source *source)
event = (const struct inotify_event *) p;
if ((event->mask & IN_ATTRIB)) {
bool access;
if (sscanf(event->name, "controlC%u", &id) != 1)
continue;
if ((device = find_device(this, id)) == NULL)
continue;
if (!device->emitted)
access = check_access(this, device);
if (access && !device->emitted)
process_device(this, ACTION_ADD, device->dev);
else if (!access && device->emitted)
process_device(this, ACTION_DISABLE, device->dev);
}
/* /dev/snd/ might have been removed */
if ((event->mask & (IN_DELETE_SELF | IN_MOVE_SELF)))