| /* 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); |