blob: e06dfebb7c6656ca39b12deb6298c9cab358f70e [file] [log] [blame]
/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once
#include "macro.h"
#include "time-util.h"
typedef struct LoopDevice LoopDevice;
/* Some helpers for setting up loopback block devices */
struct LoopDevice {
int fd;
int nr;
dev_t devno;
char *node;
bool relinquished;
uint64_t uevent_seqnum_not_before; /* uevent sequm right before we attached the loopback device, or UINT64_MAX if we don't know */
usec_t timestamp_not_before; /* CLOCK_MONOTONIC timestamp taken immediately before attaching the loopback device, or USEC_INFINITY if we don't know */
int loop_device_make(int fd, int open_flags, uint64_t offset, uint64_t size, uint32_t loop_flags, LoopDevice **ret);
int loop_device_make_by_path(const char *path, int open_flags, uint32_t loop_flags, LoopDevice **ret);
int loop_device_open(const char *loop_path, int open_flags, LoopDevice **ret);
LoopDevice* loop_device_unref(LoopDevice *d);
DEFINE_TRIVIAL_CLEANUP_FUNC(LoopDevice*, loop_device_unref);
void loop_device_relinquish(LoopDevice *d);
int loop_device_refresh_size(LoopDevice *d, uint64_t offset, uint64_t size);
int loop_device_flock(LoopDevice *d, int operation);
int loop_device_sync(LoopDevice *d);