mirror of
https://github.com/AsahiLinux/u-boot
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9c948f536f
Add call to ZSTD's ZSTD_decompressDCtx(). In this use case, the caller can upper bound the decompressed size, which will be the SquashFS data block (or metadata block) size, so there is no need to use streaming API. Add ZSTD's worskpace to squashfs_ctxt structure. Signed-off-by: Joao Marcos Costa <joaomarcos.costa@bootlin.com>
130 lines
2.6 KiB
C
130 lines
2.6 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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#if IS_ENABLED(CONFIG_ZSTD)
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#include <linux/zstd.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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#if IS_ENABLED(CONFIG_ZSTD)
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case SQFS_COMP_ZSTD:
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ctxt->zstd_workspace = malloc(ZSTD_DCtxWorkspaceBound());
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if (!ctxt->zstd_workspace)
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return -ENOMEM;
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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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#if IS_ENABLED(CONFIG_ZSTD)
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case SQFS_COMP_ZSTD:
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free(ctxt->zstd_workspace);
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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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#if IS_ENABLED(CONFIG_ZSTD)
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static int sqfs_zstd_decompress(struct squashfs_ctxt *ctxt, void *dest,
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unsigned long dest_len, void *source, u32 src_len)
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{
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ZSTD_DCtx *ctx;
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size_t wsize;
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int ret;
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wsize = ZSTD_DCtxWorkspaceBound();
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ctx = ZSTD_initDCtx(ctxt->zstd_workspace, wsize);
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ret = ZSTD_decompressDCtx(ctx, dest, dest_len, source, src_len);
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return ZSTD_isError(ret);
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}
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#endif /* CONFIG_ZSTD */
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int sqfs_decompress(struct squashfs_ctxt *ctxt, void *dest,
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unsigned long *dest_len, void *source, u32 src_len)
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{
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u16 comp_type = get_unaligned_le16(&ctxt->sblk->compression);
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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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#if IS_ENABLED(CONFIG_ZSTD)
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case SQFS_COMP_ZSTD:
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ret = sqfs_zstd_decompress(ctxt, dest, *dest_len, source, src_len);
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if (ret) {
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printf("ZSTD Error code: %d\n", ZSTD_getErrorCode(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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