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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 | // SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2020 Bootlin * * Author: Joao Marcos Costa <joaomarcos.costa@bootlin.com> */ #include <errno.h> #include <stdint.h> #include <stdio.h> #include <stdlib.h> #if IS_ENABLED(CONFIG_LZO) #include <linux/lzo.h> #endif #if IS_ENABLED(CONFIG_ZLIB) #include <u-boot/zlib.h> #endif #if IS_ENABLED(CONFIG_LZ4) #include <u-boot/lz4.h> #endif #if IS_ENABLED(CONFIG_ZSTD) #include <linux/zstd.h> #endif #include "sqfs_decompressor.h" #include "sqfs_utils.h" int sqfs_decompressor_init(struct squashfs_ctxt *ctxt) { u16 comp_type = get_unaligned_le16(&ctxt->sblk->compression); switch (comp_type) { #if IS_ENABLED(CONFIG_LZO) case SQFS_COMP_LZO: break; #endif #if IS_ENABLED(CONFIG_ZLIB) case SQFS_COMP_ZLIB: break; #endif #if IS_ENABLED(CONFIG_LZ4) case SQFS_COMP_LZ4: break; #endif #if IS_ENABLED(CONFIG_ZSTD) case SQFS_COMP_ZSTD: ctxt->zstd_workspace = malloc(zstd_dctx_workspace_bound()); if (!ctxt->zstd_workspace) return -ENOMEM; break; #endif default: printf("Error: unknown compression type.\n"); return -EINVAL; } return 0; } void sqfs_decompressor_cleanup(struct squashfs_ctxt *ctxt) { u16 comp_type = get_unaligned_le16(&ctxt->sblk->compression); switch (comp_type) { #if IS_ENABLED(CONFIG_LZO) case SQFS_COMP_LZO: break; #endif #if IS_ENABLED(CONFIG_ZLIB) case SQFS_COMP_ZLIB: break; #endif #if IS_ENABLED(CONFIG_LZ4) case SQFS_COMP_LZ4: break; #endif #if IS_ENABLED(CONFIG_ZSTD) case SQFS_COMP_ZSTD: free(ctxt->zstd_workspace); break; #endif } } #if IS_ENABLED(CONFIG_ZLIB) static void zlib_decompression_status(int ret) { switch (ret) { case Z_BUF_ERROR: printf("Error: 'dest' buffer is not large enough.\n"); break; case Z_DATA_ERROR: printf("Error: corrupted compressed data.\n"); break; case Z_MEM_ERROR: printf("Error: insufficient memory.\n"); break; } } #endif #if IS_ENABLED(CONFIG_ZSTD) static int sqfs_zstd_decompress(struct squashfs_ctxt *ctxt, void *dest, unsigned long dest_len, void *source, u32 src_len) { ZSTD_DCtx *ctx; size_t wsize; int ret; wsize = zstd_dctx_workspace_bound(); ctx = zstd_init_dctx(ctxt->zstd_workspace, wsize); if (!ctx) return -EINVAL; ret = zstd_decompress_dctx(ctx, dest, dest_len, source, src_len); return zstd_is_error(ret); } #endif /* CONFIG_ZSTD */ int sqfs_decompress(struct squashfs_ctxt *ctxt, void *dest, unsigned long *dest_len, void *source, u32 src_len) { u16 comp_type = get_unaligned_le16(&ctxt->sblk->compression); int ret = 0; switch (comp_type) { #if IS_ENABLED(CONFIG_LZO) case SQFS_COMP_LZO: { size_t lzo_dest_len = *dest_len; ret = lzo1x_decompress_safe(source, src_len, dest, &lzo_dest_len); if (ret) { printf("LZO decompression failed. Error code: %d\n", ret); return -EINVAL; } break; } #endif #if IS_ENABLED(CONFIG_ZLIB) case SQFS_COMP_ZLIB: ret = uncompress(dest, dest_len, source, src_len); if (ret) { zlib_decompression_status(ret); return -EINVAL; } break; #endif #if IS_ENABLED(CONFIG_LZ4) case SQFS_COMP_LZ4: ret = LZ4_decompress_safe(source, dest, src_len, *dest_len); if (ret < 0) { printf("LZ4 decompression failed.\n"); return -EINVAL; } ret = 0; break; #endif #if IS_ENABLED(CONFIG_ZSTD) case SQFS_COMP_ZSTD: ret = sqfs_zstd_decompress(ctxt, dest, *dest_len, source, src_len); if (ret) { printf("ZSTD Error code: %d\n", zstd_get_error_code(ret)); return -EINVAL; } break; #endif default: printf("Error: unknown compression type.\n"); return -EINVAL; } return ret; } |