blob: dfe8a13aff93b8a8afee292d71cc63b209df3f6a [file] [log] [blame]
/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once
#include "unit.h"
typedef struct Device Device;
/* A mask specifying where we have seen the device currently. This is a bitmask because the device might show up
* asynchronously from each other at various places. For example, in very common case a device might already be mounted
* before udev finished probing it (think: a script setting up a loopback block device, formatting it and mounting it
* in quick succession). Hence we need to track precisely where it is already visible and where not. */
typedef enum DeviceFound {
DEVICE_FOUND_UDEV = 1 << 0, /* The device has shown up in the udev database */
DEVICE_FOUND_MOUNT = 1 << 1, /* The device has shown up in /proc/self/mountinfo */
DEVICE_FOUND_SWAP = 1 << 2, /* The device has shown up in /proc/swaps */
} DeviceFound;
struct Device {
Unit meta;
char *sysfs;
/* In order to be able to distinguish dependencies on different device nodes we might end up creating multiple
* devices for the same sysfs path. We chain them up here. */
LIST_FIELDS(struct Device, same_sysfs);
DeviceState state, deserialized_state;
DeviceFound found, deserialized_found, enumerated_found;
bool bind_mounts;
/* The SYSTEMD_WANTS udev property for this device the last time we saw it */
char **wants_property;
extern const UnitVTable device_vtable;
void device_found_node(Manager *m, const char *node, DeviceFound found, DeviceFound mask);
bool device_shall_be_bound_by(Unit *device, Unit *u);