tree-wide: remove Lennart's copyright lines

[thirdparty/systemd.git] / src / core / device.h

diff --git a/src/core/device.h b/src/core/device.h
index 10ab113176e0d1fdebb60a924c5ee21371d41fff..a5f9bbe58cab7e2ebabf98aa1aeb8242cf7fe0eb 100644 (file)
--- a/src/core/device.h
+++ b/src/core/device.h
@@ -1,62 +1,40 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
+/* SPDX-License-Identifier: LGPL-2.1+ */
 #pragma once
 
-/***
-  This file is part of systemd.
-
-  Copyright 2010 Lennart Poettering
-
-  systemd is free software; you can redistribute it and/or modify it
-  under the terms of the GNU Lesser General Public License as published by
-  the Free Software Foundation; either version 2.1 of the License, or
-  (at your option) any later version.
-
-  systemd is distributed in the hope that it will be useful, but
-  WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-  Lesser General Public License for more details.
-
-  You should have received a copy of the GNU Lesser General Public License
-  along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
+#include "unit.h"
 
 typedef struct Device Device;
 
-/* We simply watch devices, we cannot plug/unplug them. That
- * simplifies the state engine greatly */
-typedef enum DeviceState {
-        DEVICE_DEAD,
-        DEVICE_TENTATIVE, /* mounted or swapped, but not (yet) announced by udev */
-        DEVICE_PLUGGED,   /* announced by udev */
-        _DEVICE_STATE_MAX,
-        _DEVICE_STATE_INVALID = -1
-} DeviceState;
-
+/* 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,
-        DEVICE_FOUND_MOUNT = 2,
-        DEVICE_FOUND_SWAP = 4,
+        DEVICE_NOT_FOUND   = 0,
+        DEVICE_FOUND_UDEV  = 1U << 1, /* The device has shown up in the udev database */
+        DEVICE_FOUND_MOUNT = 1U << 2, /* The device has shown up in /proc/self/mountinfo */
+        DEVICE_FOUND_SWAP  = 1U << 3, /* 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;
-        DeviceFound found;
 
-        /* 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. */
+        /* 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;
 };
 
 extern const UnitVTable device_vtable;
 
-const char* device_state_to_string(DeviceState i) _const_;
-DeviceState device_state_from_string(const char *s) _pure_;
+void device_found_node(Manager *m, const char *node, DeviceFound found, DeviceFound mask);
+bool device_shall_be_bound_by(Unit *device, Unit *u);
 
-int device_found_node(Manager *m, const char *node, bool add, DeviceFound found, bool now);
+DEFINE_CAST(DEVICE, Device);