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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>
88 lines
1.6 KiB
C
88 lines
1.6 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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#include <errno.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#if IS_ENABLED(CONFIG_ZLIB)
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#include <u-boot/zlib.h>
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#endif
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#include "sqfs_decompressor.h"
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#include "sqfs_utils.h"
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int sqfs_decompressor_init(struct squashfs_ctxt *ctxt)
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{
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u16 comp_type = get_unaligned_le16(&ctxt->sblk->compression);
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switch (comp_type) {
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#if IS_ENABLED(CONFIG_ZLIB)
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case SQFS_COMP_ZLIB:
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break;
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#endif
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default:
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printf("Error: unknown compression type.\n");
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return -EINVAL;
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}
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return 0;
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}
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void sqfs_decompressor_cleanup(struct squashfs_ctxt *ctxt)
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{
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u16 comp_type = get_unaligned_le16(&ctxt->sblk->compression);
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switch (comp_type) {
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#if IS_ENABLED(CONFIG_ZLIB)
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case SQFS_COMP_ZLIB:
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break;
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#endif
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}
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}
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#if IS_ENABLED(CONFIG_ZLIB)
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static void zlib_decompression_status(int ret)
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{
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switch (ret) {
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case Z_BUF_ERROR:
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printf("Error: 'dest' buffer is not large enough.\n");
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break;
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case Z_DATA_ERROR:
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printf("Error: corrupted compressed data.\n");
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break;
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case Z_MEM_ERROR:
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printf("Error: insufficient memory.\n");
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break;
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}
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}
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#endif
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int sqfs_decompress(u16 comp_type, void *dest, unsigned long *dest_len,
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void *source, u32 src_len)
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{
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int ret = 0;
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switch (comp_type) {
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#if IS_ENABLED(CONFIG_ZLIB)
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case SQFS_COMP_ZLIB:
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ret = uncompress(dest, dest_len, source, src_len);
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if (ret) {
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zlib_decompression_status(ret);
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return -EINVAL;
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}
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break;
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#endif
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default:
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printf("Error: unknown compression type.\n");
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return -EINVAL;
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}
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return ret;
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}
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