Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2010 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #define _FILE_OFFSET_BITS 64 |
| 18 | #define _LARGEFILE64_SOURCE 1 |
| 19 | |
| 20 | #include <fcntl.h> |
| 21 | #include <stdbool.h> |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 22 | #include <stddef.h> |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 23 | #include <stdlib.h> |
| 24 | #include <string.h> |
| 25 | #include <sys/stat.h> |
| 26 | #include <sys/types.h> |
| 27 | #include <unistd.h> |
| 28 | #include <zlib.h> |
| 29 | |
| 30 | #include "output_file.h" |
| 31 | #include "sparse_format.h" |
| 32 | #include "sparse_crc32.h" |
| 33 | |
| 34 | #ifndef USE_MINGW |
| 35 | #include <sys/mman.h> |
| 36 | #define O_BINARY 0 |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 37 | #else |
| 38 | #define ftruncate64 ftruncate |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 39 | #endif |
| 40 | |
| 41 | #if defined(__APPLE__) && defined(__MACH__) |
| 42 | #define lseek64 lseek |
| 43 | #define ftruncate64 ftruncate |
| 44 | #define mmap64 mmap |
| 45 | #define off64_t off_t |
| 46 | #endif |
| 47 | |
| 48 | #ifdef __BIONIC__ |
| 49 | extern void* __mmap2(void *, size_t, int, int, int, off_t); |
| 50 | static inline void *mmap64(void *addr, size_t length, int prot, int flags, |
| 51 | int fd, off64_t offset) |
| 52 | { |
| 53 | return __mmap2(addr, length, prot, flags, fd, offset >> 12); |
| 54 | } |
| 55 | #endif |
| 56 | |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 57 | #define min(a, b) \ |
| 58 | ({ typeof(a) _a = (a); typeof(b) _b = (b); (_a < _b) ? _a : _b; }) |
| 59 | |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 60 | #define SPARSE_HEADER_MAJOR_VER 1 |
| 61 | #define SPARSE_HEADER_MINOR_VER 0 |
| 62 | #define SPARSE_HEADER_LEN (sizeof(sparse_header_t)) |
| 63 | #define CHUNK_HEADER_LEN (sizeof(chunk_header_t)) |
| 64 | |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 65 | #define container_of(inner, outer_t, elem) \ |
| 66 | ((outer_t *)((char *)inner - offsetof(outer_t, elem))) |
| 67 | |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 68 | struct output_file_ops { |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 69 | int (*open)(struct output_file *, int fd); |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 70 | int (*skip)(struct output_file *, int64_t); |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 71 | int (*pad)(struct output_file *, int64_t); |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 72 | int (*write)(struct output_file *, void *, int); |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 73 | void (*close)(struct output_file *); |
| 74 | }; |
| 75 | |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 76 | struct sparse_file_ops { |
| 77 | int (*write_data_chunk)(struct output_file *out, unsigned int len, |
| 78 | void *data); |
| 79 | int (*write_fill_chunk)(struct output_file *out, unsigned int len, |
| 80 | uint32_t fill_val); |
| 81 | int (*write_skip_chunk)(struct output_file *out, int64_t len); |
| 82 | int (*write_end_chunk)(struct output_file *out); |
| 83 | }; |
| 84 | |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 85 | struct output_file { |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 86 | int64_t cur_out_ptr; |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 87 | unsigned int chunk_cnt; |
| 88 | uint32_t crc32; |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 89 | struct output_file_ops *ops; |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 90 | struct sparse_file_ops *sparse_ops; |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 91 | int use_crc; |
| 92 | unsigned int block_size; |
| 93 | int64_t len; |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 94 | char *zero_buf; |
| 95 | uint32_t *fill_buf; |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 96 | char *buf; |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 97 | }; |
| 98 | |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 99 | struct output_file_gz { |
| 100 | struct output_file out; |
| 101 | gzFile gz_fd; |
| 102 | }; |
| 103 | |
| 104 | #define to_output_file_gz(_o) \ |
| 105 | container_of((_o), struct output_file_gz, out) |
| 106 | |
| 107 | struct output_file_normal { |
| 108 | struct output_file out; |
| 109 | int fd; |
| 110 | }; |
| 111 | |
| 112 | #define to_output_file_normal(_o) \ |
| 113 | container_of((_o), struct output_file_normal, out) |
| 114 | |
| 115 | static int file_open(struct output_file *out, int fd) |
| 116 | { |
| 117 | struct output_file_normal *outn = to_output_file_normal(out); |
| 118 | |
| 119 | outn->fd = fd; |
| 120 | return 0; |
| 121 | } |
| 122 | |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 123 | static int file_skip(struct output_file *out, int64_t cnt) |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 124 | { |
| 125 | off64_t ret; |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 126 | struct output_file_normal *outn = to_output_file_normal(out); |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 127 | |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 128 | ret = lseek64(outn->fd, cnt, SEEK_CUR); |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 129 | if (ret < 0) { |
| 130 | error_errno("lseek64"); |
| 131 | return -1; |
| 132 | } |
| 133 | return 0; |
| 134 | } |
| 135 | |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 136 | static int file_pad(struct output_file *out, int64_t len) |
| 137 | { |
| 138 | int ret; |
| 139 | struct output_file_normal *outn = to_output_file_normal(out); |
| 140 | |
| 141 | ret = ftruncate64(outn->fd, len); |
| 142 | if (ret < 0) { |
| 143 | return -errno; |
| 144 | } |
| 145 | |
| 146 | return 0; |
| 147 | } |
| 148 | |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 149 | static int file_write(struct output_file *out, void *data, int len) |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 150 | { |
| 151 | int ret; |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 152 | struct output_file_normal *outn = to_output_file_normal(out); |
| 153 | |
| 154 | ret = write(outn->fd, data, len); |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 155 | if (ret < 0) { |
| 156 | error_errno("write"); |
| 157 | return -1; |
| 158 | } else if (ret < len) { |
| 159 | error("incomplete write"); |
| 160 | return -1; |
| 161 | } |
| 162 | |
| 163 | return 0; |
| 164 | } |
| 165 | |
| 166 | static void file_close(struct output_file *out) |
| 167 | { |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 168 | struct output_file_normal *outn = to_output_file_normal(out); |
| 169 | |
| 170 | free(outn); |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 171 | } |
| 172 | |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 173 | static struct output_file_ops file_ops = { |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 174 | .open = file_open, |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 175 | .skip = file_skip, |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 176 | .pad = file_pad, |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 177 | .write = file_write, |
| 178 | .close = file_close, |
| 179 | }; |
| 180 | |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 181 | static int gz_file_open(struct output_file *out, int fd) |
| 182 | { |
| 183 | struct output_file_gz *outgz = to_output_file_gz(out); |
| 184 | |
| 185 | outgz->gz_fd = gzdopen(fd, "wb9"); |
| 186 | if (!outgz->gz_fd) { |
| 187 | error_errno("gzopen"); |
| 188 | return -errno; |
| 189 | } |
| 190 | |
| 191 | return 0; |
| 192 | } |
| 193 | |
| 194 | |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 195 | static int gz_file_skip(struct output_file *out, int64_t cnt) |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 196 | { |
| 197 | off64_t ret; |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 198 | struct output_file_gz *outgz = to_output_file_gz(out); |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 199 | |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 200 | ret = gzseek(outgz->gz_fd, cnt, SEEK_CUR); |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 201 | if (ret < 0) { |
| 202 | error_errno("gzseek"); |
| 203 | return -1; |
| 204 | } |
| 205 | return 0; |
| 206 | } |
| 207 | |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 208 | static int gz_file_pad(struct output_file *out, int64_t len) |
| 209 | { |
| 210 | off64_t ret; |
| 211 | struct output_file_gz *outgz = to_output_file_gz(out); |
| 212 | |
| 213 | ret = gztell(outgz->gz_fd); |
| 214 | if (ret < 0) { |
| 215 | return -1; |
| 216 | } |
| 217 | |
| 218 | if (ret >= len) { |
| 219 | return 0; |
| 220 | } |
| 221 | |
| 222 | ret = gzseek(outgz->gz_fd, len - 1, SEEK_SET); |
| 223 | if (ret < 0) { |
| 224 | return -1; |
| 225 | } |
| 226 | |
| 227 | gzwrite(outgz->gz_fd, "", 1); |
| 228 | |
| 229 | return 0; |
| 230 | } |
| 231 | |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 232 | static int gz_file_write(struct output_file *out, void *data, int len) |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 233 | { |
| 234 | int ret; |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 235 | struct output_file_gz *outgz = to_output_file_gz(out); |
| 236 | |
| 237 | ret = gzwrite(outgz->gz_fd, data, len); |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 238 | if (ret < 0) { |
| 239 | error_errno("gzwrite"); |
| 240 | return -1; |
| 241 | } else if (ret < len) { |
| 242 | error("incomplete gzwrite"); |
| 243 | return -1; |
| 244 | } |
| 245 | |
| 246 | return 0; |
| 247 | } |
| 248 | |
| 249 | static void gz_file_close(struct output_file *out) |
| 250 | { |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 251 | struct output_file_gz *outgz = to_output_file_gz(out); |
| 252 | |
| 253 | gzclose(outgz->gz_fd); |
| 254 | free(outgz); |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 255 | } |
| 256 | |
| 257 | static struct output_file_ops gz_file_ops = { |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 258 | .open = gz_file_open, |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 259 | .skip = gz_file_skip, |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 260 | .pad = gz_file_pad, |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 261 | .write = gz_file_write, |
| 262 | .close = gz_file_close, |
| 263 | }; |
| 264 | |
Colin Cross | 13a5606 | 2012-06-19 16:45:48 -0700 | [diff] [blame] | 265 | int read_all(int fd, void *buf, size_t len) |
| 266 | { |
| 267 | size_t total = 0; |
| 268 | int ret; |
| 269 | char *ptr = buf; |
| 270 | |
| 271 | while (total < len) { |
| 272 | ret = read(fd, ptr, len - total); |
| 273 | |
| 274 | if (ret < 0) |
| 275 | return -errno; |
| 276 | |
| 277 | if (ret == 0) |
| 278 | return -EINVAL; |
| 279 | |
| 280 | ptr += ret; |
| 281 | total += ret; |
| 282 | } |
| 283 | |
| 284 | return 0; |
| 285 | } |
| 286 | |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 287 | static int write_sparse_skip_chunk(struct output_file *out, int64_t skip_len) |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 288 | { |
| 289 | chunk_header_t chunk_header; |
| 290 | int ret, chunk; |
| 291 | |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 292 | if (skip_len % out->block_size) { |
| 293 | error("don't care size %llu is not a multiple of the block size %u", |
| 294 | skip_len, out->block_size); |
| 295 | return -1; |
| 296 | } |
| 297 | |
| 298 | /* We are skipping data, so emit a don't care chunk. */ |
| 299 | chunk_header.chunk_type = CHUNK_TYPE_DONT_CARE; |
| 300 | chunk_header.reserved1 = 0; |
| 301 | chunk_header.chunk_sz = skip_len / out->block_size; |
| 302 | chunk_header.total_sz = CHUNK_HEADER_LEN; |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 303 | ret = out->ops->write(out, &chunk_header, sizeof(chunk_header)); |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 304 | if (ret < 0) |
| 305 | return -1; |
| 306 | |
| 307 | out->cur_out_ptr += skip_len; |
| 308 | out->chunk_cnt++; |
| 309 | |
| 310 | return 0; |
| 311 | } |
| 312 | |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 313 | static int write_sparse_fill_chunk(struct output_file *out, unsigned int len, |
| 314 | uint32_t fill_val) |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 315 | { |
| 316 | chunk_header_t chunk_header; |
| 317 | int rnd_up_len, zero_len, count; |
| 318 | int ret; |
| 319 | unsigned int i; |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 320 | |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 321 | /* Round up the fill length to a multiple of the block size */ |
| 322 | rnd_up_len = ALIGN(len, out->block_size); |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 323 | |
| 324 | /* Finally we can safely emit a chunk of data */ |
| 325 | chunk_header.chunk_type = CHUNK_TYPE_FILL; |
| 326 | chunk_header.reserved1 = 0; |
| 327 | chunk_header.chunk_sz = rnd_up_len / out->block_size; |
| 328 | chunk_header.total_sz = CHUNK_HEADER_LEN + sizeof(fill_val); |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 329 | ret = out->ops->write(out, &chunk_header, sizeof(chunk_header)); |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 330 | |
| 331 | if (ret < 0) |
| 332 | return -1; |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 333 | ret = out->ops->write(out, &fill_val, sizeof(fill_val)); |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 334 | if (ret < 0) |
| 335 | return -1; |
| 336 | |
| 337 | if (out->use_crc) { |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 338 | count = out->block_size / sizeof(uint32_t); |
| 339 | while (count--) |
| 340 | out->crc32 = sparse_crc32(out->crc32, &fill_val, sizeof(uint32_t)); |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 341 | } |
| 342 | |
| 343 | out->cur_out_ptr += rnd_up_len; |
| 344 | out->chunk_cnt++; |
| 345 | |
| 346 | return 0; |
| 347 | } |
| 348 | |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 349 | static int write_sparse_data_chunk(struct output_file *out, unsigned int len, |
| 350 | void *data) |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 351 | { |
| 352 | chunk_header_t chunk_header; |
| 353 | int rnd_up_len, zero_len; |
| 354 | int ret; |
| 355 | |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 356 | /* Round up the data length to a multiple of the block size */ |
| 357 | rnd_up_len = ALIGN(len, out->block_size); |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 358 | zero_len = rnd_up_len - len; |
| 359 | |
| 360 | /* Finally we can safely emit a chunk of data */ |
| 361 | chunk_header.chunk_type = CHUNK_TYPE_RAW; |
| 362 | chunk_header.reserved1 = 0; |
| 363 | chunk_header.chunk_sz = rnd_up_len / out->block_size; |
| 364 | chunk_header.total_sz = CHUNK_HEADER_LEN + rnd_up_len; |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 365 | ret = out->ops->write(out, &chunk_header, sizeof(chunk_header)); |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 366 | |
| 367 | if (ret < 0) |
| 368 | return -1; |
| 369 | ret = out->ops->write(out, data, len); |
| 370 | if (ret < 0) |
| 371 | return -1; |
| 372 | if (zero_len) { |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 373 | ret = out->ops->write(out, out->zero_buf, zero_len); |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 374 | if (ret < 0) |
| 375 | return -1; |
| 376 | } |
| 377 | |
| 378 | if (out->use_crc) { |
| 379 | out->crc32 = sparse_crc32(out->crc32, data, len); |
| 380 | if (zero_len) |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 381 | out->crc32 = sparse_crc32(out->crc32, out->zero_buf, zero_len); |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 382 | } |
| 383 | |
| 384 | out->cur_out_ptr += rnd_up_len; |
| 385 | out->chunk_cnt++; |
| 386 | |
| 387 | return 0; |
| 388 | } |
| 389 | |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 390 | int write_sparse_end_chunk(struct output_file *out) |
| 391 | { |
| 392 | chunk_header_t chunk_header; |
| 393 | int ret; |
| 394 | |
| 395 | if (out->use_crc) { |
| 396 | chunk_header.chunk_type = CHUNK_TYPE_CRC32; |
| 397 | chunk_header.reserved1 = 0; |
| 398 | chunk_header.chunk_sz = 0; |
| 399 | chunk_header.total_sz = CHUNK_HEADER_LEN + 4; |
| 400 | |
| 401 | ret = out->ops->write(out, &chunk_header, sizeof(chunk_header)); |
| 402 | if (ret < 0) { |
| 403 | return ret; |
| 404 | } |
| 405 | out->ops->write(out, &out->crc32, 4); |
| 406 | if (ret < 0) { |
| 407 | return ret; |
| 408 | } |
| 409 | |
| 410 | out->chunk_cnt++; |
| 411 | } |
| 412 | |
| 413 | return 0; |
| 414 | } |
| 415 | |
| 416 | static struct sparse_file_ops sparse_file_ops = { |
| 417 | .write_data_chunk = write_sparse_data_chunk, |
| 418 | .write_fill_chunk = write_sparse_fill_chunk, |
| 419 | .write_skip_chunk = write_sparse_skip_chunk, |
| 420 | .write_end_chunk = write_sparse_end_chunk, |
| 421 | }; |
| 422 | |
| 423 | static int write_normal_data_chunk(struct output_file *out, unsigned int len, |
| 424 | void *data) |
| 425 | { |
| 426 | int ret; |
| 427 | unsigned int rnd_up_len = ALIGN(len, out->block_size); |
| 428 | |
| 429 | ret = out->ops->write(out, data, len); |
| 430 | if (ret < 0) { |
| 431 | return ret; |
| 432 | } |
| 433 | |
| 434 | if (rnd_up_len > len) { |
| 435 | ret = out->ops->skip(out, rnd_up_len - len); |
| 436 | } |
| 437 | |
| 438 | return ret; |
| 439 | } |
| 440 | |
| 441 | static int write_normal_fill_chunk(struct output_file *out, unsigned int len, |
| 442 | uint32_t fill_val) |
| 443 | { |
| 444 | int ret; |
| 445 | unsigned int i; |
| 446 | unsigned int write_len; |
| 447 | |
| 448 | /* Initialize fill_buf with the fill_val */ |
| 449 | for (i = 0; i < out->block_size / sizeof(uint32_t); i++) { |
| 450 | out->fill_buf[i] = fill_val; |
| 451 | } |
| 452 | |
| 453 | while (len) { |
| 454 | write_len = min(len, out->block_size); |
| 455 | ret = out->ops->write(out, out->fill_buf, write_len); |
| 456 | if (ret < 0) { |
| 457 | return ret; |
| 458 | } |
| 459 | |
| 460 | len -= write_len; |
| 461 | } |
| 462 | |
| 463 | return 0; |
| 464 | } |
| 465 | |
| 466 | static int write_normal_skip_chunk(struct output_file *out, int64_t len) |
| 467 | { |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 468 | return out->ops->skip(out, len); |
| 469 | } |
| 470 | |
| 471 | int write_normal_end_chunk(struct output_file *out) |
| 472 | { |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 473 | return out->ops->pad(out, out->len); |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 474 | } |
| 475 | |
| 476 | static struct sparse_file_ops normal_file_ops = { |
| 477 | .write_data_chunk = write_normal_data_chunk, |
| 478 | .write_fill_chunk = write_normal_fill_chunk, |
| 479 | .write_skip_chunk = write_normal_skip_chunk, |
| 480 | .write_end_chunk = write_normal_end_chunk, |
| 481 | }; |
| 482 | |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 483 | void close_output_file(struct output_file *out) |
| 484 | { |
| 485 | int ret; |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 486 | |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 487 | out->sparse_ops->write_end_chunk(out); |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 488 | out->ops->close(out); |
| 489 | } |
| 490 | |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 491 | static int output_file_init(struct output_file *out, int block_size, |
| 492 | int64_t len, bool sparse, int chunks, bool crc) |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 493 | { |
| 494 | int ret; |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 495 | |
| 496 | out->len = len; |
| 497 | out->block_size = block_size; |
| 498 | out->cur_out_ptr = 0ll; |
| 499 | out->chunk_cnt = 0; |
| 500 | out->crc32 = 0; |
| 501 | out->use_crc = crc; |
| 502 | |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 503 | out->zero_buf = calloc(block_size, 1); |
| 504 | if (!out->zero_buf) { |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 505 | error_errno("malloc zero_buf"); |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 506 | return -ENOMEM; |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 507 | } |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 508 | |
| 509 | out->fill_buf = calloc(block_size, 1); |
| 510 | if (!out->fill_buf) { |
| 511 | error_errno("malloc fill_buf"); |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 512 | ret = -ENOMEM; |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 513 | goto err_fill_buf; |
| 514 | } |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 515 | |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 516 | if (sparse) { |
| 517 | out->sparse_ops = &sparse_file_ops; |
| 518 | } else { |
| 519 | out->sparse_ops = &normal_file_ops; |
| 520 | } |
| 521 | |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 522 | if (sparse) { |
| 523 | sparse_header_t sparse_header = { |
| 524 | .magic = SPARSE_HEADER_MAGIC, |
| 525 | .major_version = SPARSE_HEADER_MAJOR_VER, |
| 526 | .minor_version = SPARSE_HEADER_MINOR_VER, |
| 527 | .file_hdr_sz = SPARSE_HEADER_LEN, |
| 528 | .chunk_hdr_sz = CHUNK_HEADER_LEN, |
| 529 | .blk_sz = out->block_size, |
| 530 | .total_blks = out->len / out->block_size, |
| 531 | .total_chunks = chunks, |
| 532 | .image_checksum = 0 |
| 533 | }; |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 534 | |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 535 | if (out->use_crc) { |
| 536 | sparse_header.total_chunks++; |
| 537 | } |
| 538 | |
| 539 | ret = out->ops->write(out, &sparse_header, sizeof(sparse_header)); |
| 540 | if (ret < 0) { |
| 541 | goto err_write; |
| 542 | } |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 543 | } |
| 544 | |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 545 | return 0; |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 546 | |
| 547 | err_write: |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 548 | free(out->fill_buf); |
| 549 | err_fill_buf: |
| 550 | free(out->zero_buf); |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 551 | return ret; |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 552 | } |
| 553 | |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 554 | static struct output_file *output_file_new_gz(void) |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 555 | { |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 556 | struct output_file_gz *outgz = calloc(1, sizeof(struct output_file_gz)); |
| 557 | if (!outgz) { |
| 558 | error_errno("malloc struct outgz"); |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 559 | return NULL; |
| 560 | } |
| 561 | |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 562 | outgz->out.ops = &gz_file_ops; |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 563 | |
Colin Cross | b4cd267 | 2012-05-18 14:49:50 -0700 | [diff] [blame^] | 564 | return &outgz->out; |
| 565 | } |
| 566 | |
| 567 | static struct output_file *output_file_new_normal(void) |
| 568 | { |
| 569 | struct output_file_normal *outn = calloc(1, sizeof(struct output_file_normal)); |
| 570 | if (!outn) { |
| 571 | error_errno("malloc struct outn"); |
| 572 | return NULL; |
| 573 | } |
| 574 | |
| 575 | outn->out.ops = &file_ops; |
| 576 | |
| 577 | return &outn->out; |
| 578 | } |
| 579 | |
| 580 | struct output_file *open_output_fd(int fd, unsigned int block_size, int64_t len, |
| 581 | int gz, int sparse, int chunks, int crc) |
| 582 | { |
| 583 | int ret; |
| 584 | struct output_file *out; |
| 585 | |
| 586 | if (gz) { |
| 587 | out = output_file_new_gz(); |
| 588 | } else { |
| 589 | out = output_file_new_normal(); |
| 590 | } |
| 591 | |
| 592 | out->ops->open(out, fd); |
| 593 | |
| 594 | ret = output_file_init(out, block_size, len, sparse, chunks, crc); |
| 595 | if (ret < 0) { |
| 596 | free(out); |
| 597 | return NULL; |
| 598 | } |
| 599 | |
| 600 | return out; |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 601 | } |
| 602 | |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 603 | /* Write a contiguous region of data blocks from a memory buffer */ |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 604 | int write_data_chunk(struct output_file *out, unsigned int len, void *data) |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 605 | { |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 606 | return out->sparse_ops->write_data_chunk(out, len, data); |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 607 | } |
| 608 | |
| 609 | /* Write a contiguous region of data blocks with a fill value */ |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 610 | int write_fill_chunk(struct output_file *out, unsigned int len, |
| 611 | uint32_t fill_val) |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 612 | { |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 613 | return out->sparse_ops->write_fill_chunk(out, len, fill_val); |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 614 | } |
| 615 | |
Colin Cross | 9e1f17e | 2012-04-25 18:31:39 -0700 | [diff] [blame] | 616 | int write_fd_chunk(struct output_file *out, unsigned int len, |
| 617 | int fd, int64_t offset) |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 618 | { |
| 619 | int ret; |
| 620 | int64_t aligned_offset; |
| 621 | int aligned_diff; |
| 622 | int buffer_size; |
Colin Cross | 13a5606 | 2012-06-19 16:45:48 -0700 | [diff] [blame] | 623 | char *ptr; |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 624 | |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 625 | aligned_offset = offset & ~(4096 - 1); |
| 626 | aligned_diff = offset - aligned_offset; |
| 627 | buffer_size = len + aligned_diff; |
| 628 | |
| 629 | #ifndef USE_MINGW |
Colin Cross | 9e1f17e | 2012-04-25 18:31:39 -0700 | [diff] [blame] | 630 | char *data = mmap64(NULL, buffer_size, PROT_READ, MAP_SHARED, fd, |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 631 | aligned_offset); |
| 632 | if (data == MAP_FAILED) { |
Colin Cross | 9e1f17e | 2012-04-25 18:31:39 -0700 | [diff] [blame] | 633 | return -errno; |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 634 | } |
Colin Cross | 13a5606 | 2012-06-19 16:45:48 -0700 | [diff] [blame] | 635 | ptr = data + aligned_diff; |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 636 | #else |
Colin Cross | 13a5606 | 2012-06-19 16:45:48 -0700 | [diff] [blame] | 637 | off64_t pos; |
| 638 | char *data = malloc(len); |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 639 | if (!data) { |
Colin Cross | 9e1f17e | 2012-04-25 18:31:39 -0700 | [diff] [blame] | 640 | return -errno; |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 641 | } |
Colin Cross | 13a5606 | 2012-06-19 16:45:48 -0700 | [diff] [blame] | 642 | pos = lseek64(fd, offset, SEEK_SET); |
| 643 | if (pos < 0) { |
| 644 | return -errno; |
| 645 | } |
| 646 | ret = read_all(fd, data, len); |
| 647 | if (ret < 0) { |
| 648 | return ret; |
| 649 | } |
| 650 | ptr = data; |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 651 | #endif |
| 652 | |
Colin Cross | 13a5606 | 2012-06-19 16:45:48 -0700 | [diff] [blame] | 653 | ret = out->sparse_ops->write_data_chunk(out, len, ptr); |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 654 | |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 655 | #ifndef USE_MINGW |
| 656 | munmap(data, buffer_size); |
| 657 | #else |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 658 | free(data); |
| 659 | #endif |
Colin Cross | 9e1f17e | 2012-04-25 18:31:39 -0700 | [diff] [blame] | 660 | |
| 661 | return ret; |
| 662 | } |
| 663 | |
| 664 | /* Write a contiguous region of data blocks from a file */ |
| 665 | int write_file_chunk(struct output_file *out, unsigned int len, |
| 666 | const char *file, int64_t offset) |
| 667 | { |
| 668 | int ret; |
| 669 | |
| 670 | int file_fd = open(file, O_RDONLY | O_BINARY); |
| 671 | if (file_fd < 0) { |
| 672 | return -errno; |
| 673 | } |
| 674 | |
| 675 | ret = write_fd_chunk(out, len, file_fd, offset); |
| 676 | |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 677 | close(file_fd); |
Colin Cross | b55dcee | 2012-04-24 23:07:49 -0700 | [diff] [blame] | 678 | |
| 679 | return ret; |
| 680 | } |
| 681 | |
| 682 | int write_skip_chunk(struct output_file *out, int64_t len) |
| 683 | { |
| 684 | return out->sparse_ops->write_skip_chunk(out, len); |
Colin Cross | 28fa5bc | 2012-05-20 13:28:05 -0700 | [diff] [blame] | 685 | } |