Colin Cross | a7ed433 | 2010-12-22 23:08:15 -0800 | [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 | |
Colin Cross | f0ee37f | 2012-04-24 17:48:43 -0700 | [diff] [blame] | 17 | #define _FILE_OFFSET_BITS 64 |
| 18 | #define _LARGEFILE64_SOURCE 1 |
Colin Cross | a7ed433 | 2010-12-22 23:08:15 -0800 | [diff] [blame] | 19 | |
| 20 | #include <sys/types.h> |
| 21 | #include <sys/stat.h> |
| 22 | #include <sys/types.h> |
| 23 | #include <sys/mman.h> |
| 24 | #include <fcntl.h> |
| 25 | #include <libgen.h> |
| 26 | #include <unistd.h> |
| 27 | |
Colin Cross | f0ee37f | 2012-04-24 17:48:43 -0700 | [diff] [blame] | 28 | #include <sparse/sparse.h> |
| 29 | |
| 30 | #include "ext4_utils.h" |
| 31 | #include "make_ext4fs.h" |
| 32 | #include "allocate.h" |
| 33 | |
| 34 | #if defined(__APPLE__) && defined(__MACH__) |
| 35 | #define off64_t off_t |
| 36 | #endif |
| 37 | |
Anatol Pomazau | 0349bd9 | 2012-01-11 15:12:27 -0800 | [diff] [blame] | 38 | #ifndef USE_MINGW /* O_BINARY is windows-specific flag */ |
| 39 | #define O_BINARY 0 |
| 40 | #endif |
| 41 | |
Colin Cross | a7ed433 | 2010-12-22 23:08:15 -0800 | [diff] [blame] | 42 | extern struct fs_info info; |
| 43 | |
| 44 | static int verbose = 0; |
| 45 | |
| 46 | static void usage(char *path) |
| 47 | { |
| 48 | fprintf(stderr, "%s [ options ] <image or block device> <output image>\n", path); |
| 49 | fprintf(stderr, "\n"); |
| 50 | fprintf(stderr, " -c include CRC block\n"); |
| 51 | fprintf(stderr, " -v verbose output\n"); |
| 52 | fprintf(stderr, " -z gzip output\n"); |
| 53 | fprintf(stderr, " -S don't use sparse output format\n"); |
| 54 | } |
| 55 | |
Colin Cross | a7ed433 | 2010-12-22 23:08:15 -0800 | [diff] [blame] | 56 | static int build_sparse_ext(int fd, const char *filename) |
| 57 | { |
| 58 | unsigned int i; |
| 59 | unsigned int block; |
| 60 | int start_contiguous_block; |
| 61 | u8 *block_bitmap; |
| 62 | off64_t ret; |
| 63 | |
| 64 | block_bitmap = malloc(info.block_size); |
| 65 | if (!block_bitmap) |
| 66 | critical_error("failed to allocate block bitmap"); |
| 67 | |
| 68 | if (aux_info.first_data_block > 0) |
Colin Cross | 782879a | 2014-01-23 13:08:16 -0800 | [diff] [blame] | 69 | sparse_file_add_file(ext4_sparse_file, filename, 0, |
Colin Cross | a7ed433 | 2010-12-22 23:08:15 -0800 | [diff] [blame] | 70 | info.block_size * aux_info.first_data_block, 0); |
| 71 | |
| 72 | for (i = 0; i < aux_info.groups; i++) { |
| 73 | u32 first_block = aux_info.first_data_block + i * info.blocks_per_group; |
| 74 | u32 last_block = min(info.blocks_per_group, aux_info.len_blocks - first_block); |
| 75 | |
| 76 | ret = lseek64(fd, (u64)info.block_size * aux_info.bg_desc[i].bg_block_bitmap, |
| 77 | SEEK_SET); |
| 78 | if (ret < 0) |
| 79 | critical_error_errno("failed to seek to block group bitmap %d", i); |
| 80 | |
| 81 | ret = read(fd, block_bitmap, info.block_size); |
| 82 | if (ret < 0) |
| 83 | critical_error_errno("failed to read block group bitmap %d", i); |
| 84 | if (ret != (int)info.block_size) |
| 85 | critical_error("failed to read all of block group bitmap %d", i); |
| 86 | |
| 87 | start_contiguous_block = -1; |
| 88 | for (block = 0; block < last_block; block++) { |
| 89 | if (start_contiguous_block >= 0) { |
| 90 | if (!bitmap_get_bit(block_bitmap, block)) { |
| 91 | u32 start_block = first_block + start_contiguous_block; |
| 92 | u32 len_blocks = block - start_contiguous_block; |
| 93 | |
Colin Cross | 782879a | 2014-01-23 13:08:16 -0800 | [diff] [blame] | 94 | sparse_file_add_file(ext4_sparse_file, filename, |
Colin Cross | f0ee37f | 2012-04-24 17:48:43 -0700 | [diff] [blame] | 95 | (u64)info.block_size * start_block, |
Colin Cross | a7ed433 | 2010-12-22 23:08:15 -0800 | [diff] [blame] | 96 | info.block_size * len_blocks, start_block); |
| 97 | start_contiguous_block = -1; |
| 98 | } |
| 99 | } else { |
| 100 | if (bitmap_get_bit(block_bitmap, block)) |
| 101 | start_contiguous_block = block; |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | if (start_contiguous_block >= 0) { |
| 106 | u32 start_block = first_block + start_contiguous_block; |
| 107 | u32 len_blocks = last_block - start_contiguous_block; |
Colin Cross | 782879a | 2014-01-23 13:08:16 -0800 | [diff] [blame] | 108 | sparse_file_add_file(ext4_sparse_file, filename, |
Colin Cross | f0ee37f | 2012-04-24 17:48:43 -0700 | [diff] [blame] | 109 | (u64)info.block_size * start_block, |
Colin Cross | a7ed433 | 2010-12-22 23:08:15 -0800 | [diff] [blame] | 110 | info.block_size * len_blocks, start_block); |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | return 0; |
| 115 | } |
| 116 | |
| 117 | int main(int argc, char **argv) |
| 118 | { |
| 119 | int opt; |
| 120 | const char *in = NULL; |
| 121 | const char *out = NULL; |
| 122 | int gzip = 0; |
| 123 | int sparse = 1; |
Anatol Pomazau | 0349bd9 | 2012-01-11 15:12:27 -0800 | [diff] [blame] | 124 | int infd, outfd; |
Colin Cross | a7ed433 | 2010-12-22 23:08:15 -0800 | [diff] [blame] | 125 | int crc = 0; |
| 126 | |
| 127 | while ((opt = getopt(argc, argv, "cvzS")) != -1) { |
| 128 | switch (opt) { |
| 129 | case 'c': |
| 130 | crc = 1; |
| 131 | break; |
| 132 | case 'v': |
| 133 | verbose = 1; |
| 134 | break; |
| 135 | case 'z': |
| 136 | gzip = 1; |
| 137 | break; |
| 138 | case 'S': |
| 139 | sparse = 0; |
| 140 | break; |
| 141 | } |
| 142 | } |
| 143 | |
| 144 | if (optind >= argc) { |
| 145 | fprintf(stderr, "Expected image or block device after options\n"); |
| 146 | usage(argv[0]); |
| 147 | exit(EXIT_FAILURE); |
| 148 | } |
| 149 | |
| 150 | in = argv[optind++]; |
| 151 | |
| 152 | if (optind >= argc) { |
| 153 | fprintf(stderr, "Expected output image after input image\n"); |
| 154 | usage(argv[0]); |
| 155 | exit(EXIT_FAILURE); |
| 156 | } |
| 157 | |
| 158 | out = argv[optind++]; |
| 159 | |
| 160 | if (optind < argc) { |
| 161 | fprintf(stderr, "Unexpected argument: %s\n", argv[optind]); |
| 162 | usage(argv[0]); |
| 163 | exit(EXIT_FAILURE); |
| 164 | } |
| 165 | |
Anatol Pomazau | 0349bd9 | 2012-01-11 15:12:27 -0800 | [diff] [blame] | 166 | infd = open(in, O_RDONLY); |
Colin Cross | a7ed433 | 2010-12-22 23:08:15 -0800 | [diff] [blame] | 167 | |
Anatol Pomazau | 0349bd9 | 2012-01-11 15:12:27 -0800 | [diff] [blame] | 168 | if (infd < 0) |
Colin Cross | a7ed433 | 2010-12-22 23:08:15 -0800 | [diff] [blame] | 169 | critical_error_errno("failed to open input image"); |
| 170 | |
Paul Lawrence | ee2bba6 | 2014-01-21 08:26:21 -0800 | [diff] [blame] | 171 | read_ext(infd, verbose); |
Colin Cross | a7ed433 | 2010-12-22 23:08:15 -0800 | [diff] [blame] | 172 | |
Colin Cross | 782879a | 2014-01-23 13:08:16 -0800 | [diff] [blame] | 173 | ext4_sparse_file = sparse_file_new(info.block_size, info.len); |
Colin Cross | f0ee37f | 2012-04-24 17:48:43 -0700 | [diff] [blame] | 174 | |
Anatol Pomazau | 0349bd9 | 2012-01-11 15:12:27 -0800 | [diff] [blame] | 175 | build_sparse_ext(infd, in); |
Colin Cross | a7ed433 | 2010-12-22 23:08:15 -0800 | [diff] [blame] | 176 | |
Anatol Pomazau | 0349bd9 | 2012-01-11 15:12:27 -0800 | [diff] [blame] | 177 | close(infd); |
Colin Cross | a7ed433 | 2010-12-22 23:08:15 -0800 | [diff] [blame] | 178 | |
Anatol Pomazau | 0349bd9 | 2012-01-11 15:12:27 -0800 | [diff] [blame] | 179 | if (strcmp(out, "-")) { |
| 180 | outfd = open(out, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0644); |
| 181 | if (outfd < 0) { |
| 182 | error_errno("open"); |
| 183 | return EXIT_FAILURE; |
| 184 | } |
| 185 | } else { |
| 186 | outfd = STDOUT_FILENO; |
| 187 | } |
| 188 | |
Colin Cross | dc5abee | 2012-04-23 23:20:48 -0700 | [diff] [blame] | 189 | write_ext4_image(outfd, gzip, sparse, crc); |
Anatol Pomazau | 0349bd9 | 2012-01-11 15:12:27 -0800 | [diff] [blame] | 190 | close(outfd); |
Colin Cross | a7ed433 | 2010-12-22 23:08:15 -0800 | [diff] [blame] | 191 | |
Colin Cross | 782879a | 2014-01-23 13:08:16 -0800 | [diff] [blame] | 192 | sparse_file_destroy(ext4_sparse_file); |
Colin Cross | f0ee37f | 2012-04-24 17:48:43 -0700 | [diff] [blame] | 193 | |
Colin Cross | a7ed433 | 2010-12-22 23:08:15 -0800 | [diff] [blame] | 194 | return 0; |
| 195 | } |