10f7cf5f12
Add sqfs_decompressor_init() and sqfs_decompressor_cleanup(). These functions are called respectively in sqfs_probe() and sqfs_close(). For now, only ZSTD requires an initialization logic. ZSTD support will be added in a follow-up commit. Move squashfs_ctxt definition to sqfs_filesystem.h. This structure is passed to sqfs_decompressor_init() and sqfs_decompressor_cleanup(), so it can no longer be local to sqfs.c. Signed-off-by: Joao Marcos Costa <joaomarcos.costa@bootlin.com>
61 lines
1.2 KiB
C
61 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2020 Bootlin
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*
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* Author: Joao Marcos Costa <joaomarcos.costa@bootlin.com>
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*/
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#ifndef SQFS_DECOMPRESSOR_H
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#define SQFS_DECOMPRESSOR_H
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#include <stdint.h>
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#include "sqfs_filesystem.h"
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#define SQFS_COMP_ZLIB 1
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#define SQFS_COMP_LZMA 2
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#define SQFS_COMP_LZO 3
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#define SQFS_COMP_XZ 4
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#define SQFS_COMP_LZ4 5
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#define SQFS_COMP_ZSTD 6
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/* LZMA does not support any compression options */
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struct squashfs_gzip_opts {
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u32 compression_level;
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u16 window_size;
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u16 strategies;
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};
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struct squashfs_xz_opts {
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u32 dictionary_size;
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u32 executable_filters;
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};
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struct squashfs_lz4_opts {
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u32 version;
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u32 flags;
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};
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struct squashfs_zstd_opts {
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u32 compression_level;
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};
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struct squashfs_lzo_opts {
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u32 algorithm;
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u32 level;
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};
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union squashfs_compression_opts {
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struct squashfs_gzip_opts *gzip;
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struct squashfs_xz_opts *xz;
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struct squashfs_lz4_opts *lz4;
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struct squashfs_zstd_opts *zstd;
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struct squashfs_lzo_opts *lzo;
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};
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int sqfs_decompress(u16 comp_type, void *dest, unsigned long *dest_len,
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void *source, u32 lenp);
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int sqfs_decompressor_init(struct squashfs_ctxt *ctxt);
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void sqfs_decompressor_cleanup(struct squashfs_ctxt *ctxt);
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#endif /* SQFS_DECOMPRESSOR_H */
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