53e1b68390
This follows what the kernel is doing, c.f. https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5fd54ace4721fc5ce2bb5aef6318fcf17f421460.
87 lines
3.4 KiB
C
87 lines
3.4 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
|
|
#pragma once
|
|
|
|
/***
|
|
This file is part of systemd.
|
|
|
|
Copyright 2011 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 <unistd.h>
|
|
|
|
#include "journal-def.h"
|
|
|
|
const char* object_compressed_to_string(int compression);
|
|
int object_compressed_from_string(const char *compression);
|
|
|
|
int compress_blob_xz(const void *src, uint64_t src_size,
|
|
void *dst, size_t dst_alloc_size, size_t *dst_size);
|
|
int compress_blob_lz4(const void *src, uint64_t src_size,
|
|
void *dst, size_t dst_alloc_size, size_t *dst_size);
|
|
|
|
static inline int compress_blob(const void *src, uint64_t src_size,
|
|
void *dst, size_t dst_alloc_size, size_t *dst_size) {
|
|
int r;
|
|
#if HAVE_LZ4
|
|
r = compress_blob_lz4(src, src_size, dst, dst_alloc_size, dst_size);
|
|
if (r == 0)
|
|
return OBJECT_COMPRESSED_LZ4;
|
|
#else
|
|
r = compress_blob_xz(src, src_size, dst, dst_alloc_size, dst_size);
|
|
if (r == 0)
|
|
return OBJECT_COMPRESSED_XZ;
|
|
#endif
|
|
return r;
|
|
}
|
|
|
|
int decompress_blob_xz(const void *src, uint64_t src_size,
|
|
void **dst, size_t *dst_alloc_size, size_t* dst_size, size_t dst_max);
|
|
int decompress_blob_lz4(const void *src, uint64_t src_size,
|
|
void **dst, size_t *dst_alloc_size, size_t* dst_size, size_t dst_max);
|
|
int decompress_blob(int compression,
|
|
const void *src, uint64_t src_size,
|
|
void **dst, size_t *dst_alloc_size, size_t* dst_size, size_t dst_max);
|
|
|
|
int decompress_startswith_xz(const void *src, uint64_t src_size,
|
|
void **buffer, size_t *buffer_size,
|
|
const void *prefix, size_t prefix_len,
|
|
uint8_t extra);
|
|
int decompress_startswith_lz4(const void *src, uint64_t src_size,
|
|
void **buffer, size_t *buffer_size,
|
|
const void *prefix, size_t prefix_len,
|
|
uint8_t extra);
|
|
int decompress_startswith(int compression,
|
|
const void *src, uint64_t src_size,
|
|
void **buffer, size_t *buffer_size,
|
|
const void *prefix, size_t prefix_len,
|
|
uint8_t extra);
|
|
|
|
int compress_stream_xz(int fdf, int fdt, uint64_t max_bytes);
|
|
int compress_stream_lz4(int fdf, int fdt, uint64_t max_bytes);
|
|
|
|
int decompress_stream_xz(int fdf, int fdt, uint64_t max_size);
|
|
int decompress_stream_lz4(int fdf, int fdt, uint64_t max_size);
|
|
|
|
#if HAVE_LZ4
|
|
# define compress_stream compress_stream_lz4
|
|
# define COMPRESSED_EXT ".lz4"
|
|
#else
|
|
# define compress_stream compress_stream_xz
|
|
# define COMPRESSED_EXT ".xz"
|
|
#endif
|
|
|
|
int decompress_stream(const char *filename, int fdf, int fdt, uint64_t max_bytes);
|