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/* 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_NOT_FOUND = 0,
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 */
DEVICE_FOUND_MASK = DEVICE_FOUND_UDEV|DEVICE_FOUND_MOUNT|DEVICE_FOUND_SWAP,
} DeviceFound;
struct Device {
Unit meta;
char *sysfs;
char *path; /* syspath, device node, alias, or devlink */
/* 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);
DEFINE_CAST(DEVICE, Device);
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