Line data    Source code

       1             : /* SPDX-License-Identifier: LGPL-2.1+ */
       2             : #pragma once
       3             : 
       4             : #include "unit.h"
       5             : 
       6             : typedef struct Device Device;
       7             : 
       8             : /* A mask specifying where we have seen the device currently. This is a bitmask because the device might show up
       9             :  * asynchronously from each other at various places. For example, in very common case a device might already be mounted
      10             :  * before udev finished probing it (think: a script setting up a loopback block device, formatting it and mounting it
      11             :  * in quick succession). Hence we need to track precisely where it is already visible and where not. */
      12             : typedef enum DeviceFound {
      13             :         DEVICE_NOT_FOUND   = 0,
      14             :         DEVICE_FOUND_UDEV  = 1 << 0, /* The device has shown up in the udev database */
      15             :         DEVICE_FOUND_MOUNT = 1 << 1, /* The device has shown up in /proc/self/mountinfo */
      16             :         DEVICE_FOUND_SWAP  = 1 << 2, /* The device has shown up in /proc/swaps */
      17             :         DEVICE_FOUND_MASK  = DEVICE_FOUND_UDEV|DEVICE_FOUND_MOUNT|DEVICE_FOUND_SWAP,
      18             : } DeviceFound;
      19             : 
      20             : struct Device {
      21             :         Unit meta;
      22             : 
      23             :         char *sysfs;
      24             : 
      25             :         /* In order to be able to distinguish dependencies on different device nodes we might end up creating multiple
      26             :          * devices for the same sysfs path. We chain them up here. */
      27             :         LIST_FIELDS(struct Device, same_sysfs);
      28             : 
      29             :         DeviceState state, deserialized_state;
      30             :         DeviceFound found, deserialized_found, enumerated_found;
      31             : 
      32             :         bool bind_mounts;
      33             : 
      34             :         /* The SYSTEMD_WANTS udev property for this device the last time we saw it */
      35             :         char **wants_property;
      36             : };
      37             : 
      38             : extern const UnitVTable device_vtable;
      39             : 
      40             : void device_found_node(Manager *m, const char *node, DeviceFound found, DeviceFound mask);
      41             : bool device_shall_be_bound_by(Unit *device, Unit *u);
      42             : 
      43       19305 : DEFINE_CAST(DEVICE, Device);