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v4l2: remove device if inotify reports it's no longer accessible

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Pauli Virtanen 2021-04-11 14:27:49 +03:00 • committed by Wim Taymans
parent bf3b5d4286
commit 20e383cea7
1 changed files with 15 additions and 1 deletions
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16
spa/plugins/v4l2/v4l2-udev.c
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@ -49,6 +49,7 @@
#define ACTION_ADD 0 #define ACTION_ADD 0
#define ACTION_REMOVE 1 #define ACTION_REMOVE 1
#define ACTION_DISABLE 2
struct device { struct device {
uint32_t id; uint32_t id;
@ -362,6 +363,15 @@ static void process_device(struct impl *this, uint32_t action, struct udev_devic
if (emitted) if (emitted)
spa_device_emit_object_info(&this->hooks, id, NULL); spa_device_emit_object_info(&this->hooks, id, NULL);
break; break;
case ACTION_DISABLE:
if (device == NULL)
return;
if (device->emitted) {
device->emitted = false;
spa_device_emit_object_info(&this->hooks, id, NULL);
}
break;
} }
} }
@ -406,12 +416,16 @@ static void impl_on_notify_events(struct spa_source *source)
event = (const struct inotify_event *) p; event = (const struct inotify_event *) p;
if ((event->mask & IN_ATTRIB)) { if ((event->mask & IN_ATTRIB)) {
bool access;
if (sscanf(event->name, "video%u", &id) != 1) if (sscanf(event->name, "video%u", &id) != 1)
continue; continue;
if ((device = find_device(this, id)) == NULL) if ((device = find_device(this, id)) == NULL)
continue; continue;
if (!device->emitted) access = check_access(this, device);
if (access && !device->emitted)
process_device(this, ACTION_ADD, device->dev); process_device(this, ACTION_ADD, device->dev);
else if (!access && device->emitted)
process_device(this, ACTION_DISABLE, device->dev);
} }
/* /dev/ might have been removed */ /* /dev/ might have been removed */
if ((event->mask & (IN_DELETE_SELF | IN_MOVE_SELF))) if ((event->mask & (IN_DELETE_SELF | IN_MOVE_SELF)))