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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once
#include <sd-bus.h>
#include "user-record.h"
typedef enum OperationType {
OPERATION_ACQUIRE, /* enqueued on AcquireHome() */
OPERATION_RELEASE, /* enqueued on ReleaseHome() */
OPERATION_LOCK_ALL, /* enqueued on LockAllHomes() */
OPERATION_DEACTIVATE_ALL, /* enqueued on DeactivateAllHomes() */
OPERATION_PIPE_EOF, /* enqueued when we see EOF on the per-home reference pipes */
OPERATION_DEACTIVATE_FORCE, /* enqueued on hard $HOME unplug */
OPERATION_IMMEDIATE, /* this is never enqueued, it's just a marker we immediately started executing an operation without enqueuing anything first. */
_OPERATION_MAX,
_OPERATION_INVALID = -EINVAL,
} OperationType;
/* Encapsulates an operation on one or more home directories. This has two uses:
*
* 1) For queuing an operation when we need to execute one for some reason but there's already one being
* executed.
*
* 2) When executing an operation without enqueuing it first (OPERATION_IMMEDIATE)
*
* Note that a single operation object can encapsulate operations on multiple home directories. This is used
* for the LockAllHomes() operation, which is one operation but applies to all homes at once. In case the
* operation applies to multiple homes the reference counter is increased once for each, and thus the
* operation is fully completed only after it reached zero again.
*
* The object (optionally) contains a reference of the D-Bus message triggering the operation, which is
* replied to when the operation is fully completed, i.e. when n_ref reaches zero.
*/
typedef struct Operation {
unsigned n_ref;
OperationType type;
sd_bus_message *message;
UserRecord *secret;
int send_fd; /* pipe fd for AcquireHome() which is taken already when we start the operation */
int result; /* < 0 if not completed yet, == 0 on failure, > 0 on success */
sd_bus_error error;
int ret;
} Operation;
Operation *operation_new(OperationType type, sd_bus_message *m);
Operation *operation_ref(Operation *operation);
Operation *operation_unref(Operation *operation);
DEFINE_TRIVIAL_CLEANUP_FUNC(Operation*, operation_unref);
void operation_result(Operation *o, int ret, const sd_bus_error *error);
static inline Operation* operation_result_unref(Operation *o, int ret, const sd_bus_error *error) {
if (!o)
return NULL;
operation_result(o, ret, error);
return operation_unref(o);
}
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