| /* 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; |
| |
| /* 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); |