mirror of
https://github.com/morgan9e/systemd
synced 2026-04-14 16:37:19 +09:00
ad920b4cb3
If an enumerated device has ID_PROCESSING=1 property, and the service manager does not know if the device has been processed by udevd previously (that is, Device.deserialized_found does not have DEVICE_FOUND_UDEV), then drop DEVICE_FOUND_UDEV flag from the device and make the device not enter the active state. Follow-up for405be62f05, which was reverted byc4fc22c4de.
47 lines
2.1 KiB
C
47 lines
2.1 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#pragma once
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#include "unit.h"
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typedef struct Device Device;
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/* A mask specifying where we have seen the device currently. This is a bitmask because the device might show up
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* asynchronously from each other at various places. For example, in very common case a device might already be mounted
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* before udev finished probing it (think: a script setting up a loopback block device, formatting it and mounting it
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* in quick succession). Hence we need to track precisely where it is already visible and where not. */
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typedef enum DeviceFound {
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DEVICE_NOT_FOUND = 0,
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DEVICE_FOUND_UDEV = 1 << 0, /* The device has shown up in the udev database */
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DEVICE_FOUND_MOUNT = 1 << 1, /* The device has shown up in /proc/self/mountinfo */
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DEVICE_FOUND_SWAP = 1 << 2, /* The device has shown up in /proc/swaps */
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_DEVICE_FOUND_MASK = DEVICE_FOUND_UDEV|DEVICE_FOUND_MOUNT|DEVICE_FOUND_SWAP,
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} DeviceFound;
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struct Device {
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Unit meta;
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char *sysfs, *deserialized_sysfs;
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char *path; /* syspath, device node, alias, or devlink */
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/* In order to be able to distinguish dependencies on different device nodes we might end up creating multiple
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* devices for the same sysfs path. We chain them up here. */
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LIST_FIELDS(struct Device, same_sysfs);
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DeviceState state, deserialized_state;
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DeviceFound found, deserialized_found, enumerated_found;
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bool processed; /* Whether udevd has done processing the device, i.e. the device has database and
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* ID_PROCESSING=1 udev property is not set. This is used only by enumeration and
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* subsequent catchup process. */
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bool bind_mounts;
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/* The SYSTEMD_WANTS udev property for this device the last time we saw it */
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char **wants_property;
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};
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extern const UnitVTable device_vtable;
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void device_found_node(Manager *m, const char *node, DeviceFound found, DeviceFound mask);
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bool device_shall_be_bound_by(Unit *device, Unit *u);
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DEFINE_CAST(DEVICE, Device);
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