bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1 | /* |
bellard | fb43f4d | 2006-08-07 21:34:46 +0000 | [diff] [blame] | 2 | * QEMU disk image utility |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 3 | * |
bellard | 68d0f70 | 2008-01-06 17:21:48 +0000 | [diff] [blame] | 4 | * Copyright (c) 2003-2008 Fabrice Bellard |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 5 | * |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 7 | * of this software and associated documentation files (the "Software"), to deal |
| 8 | * in the Software without restriction, including without limitation the rights |
| 9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 10 | * copies of the Software, and to permit persons to whom the Software is |
| 11 | * furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in |
| 14 | * all copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 22 | * THE SOFTWARE. |
| 23 | */ |
pbrook | faf0796 | 2007-11-11 02:51:17 +0000 | [diff] [blame] | 24 | #include "qemu-common.h" |
Kevin Wolf | 9ea2ea7 | 2009-05-18 16:42:11 +0200 | [diff] [blame] | 25 | #include "qemu-option.h" |
aliguori | f7b4a94 | 2009-01-07 17:40:15 +0000 | [diff] [blame] | 26 | #include "osdep.h" |
ths | ec36ba1 | 2007-09-16 21:59:02 +0000 | [diff] [blame] | 27 | #include "block_int.h" |
aliguori | 9230eaf | 2009-03-28 17:55:19 +0000 | [diff] [blame] | 28 | #include <stdio.h> |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 29 | |
bellard | e844533 | 2006-06-14 15:32:10 +0000 | [diff] [blame] | 30 | #ifdef _WIN32 |
| 31 | #include <windows.h> |
| 32 | #endif |
| 33 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 34 | typedef struct img_cmd_t { |
Stuart Brady | 153859b | 2009-06-07 00:42:17 +0100 | [diff] [blame] | 35 | const char *name; |
| 36 | int (*handler)(int argc, char **argv); |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 37 | } img_cmd_t; |
Stuart Brady | 153859b | 2009-06-07 00:42:17 +0100 | [diff] [blame] | 38 | |
aurel32 | 137519c | 2008-11-30 19:12:49 +0000 | [diff] [blame] | 39 | /* Default to cache=writeback as data integrity is not important for qemu-tcg. */ |
| 40 | #define BRDV_O_FLAGS BDRV_O_CACHE_WB |
| 41 | |
malc | a5e50b2 | 2009-02-01 22:19:27 +0000 | [diff] [blame] | 42 | static void QEMU_NORETURN error(const char *fmt, ...) |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 43 | { |
| 44 | va_list ap; |
| 45 | va_start(ap, fmt); |
bellard | 57d1a2b | 2004-08-03 21:15:11 +0000 | [diff] [blame] | 46 | fprintf(stderr, "qemu-img: "); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 47 | vfprintf(stderr, fmt, ap); |
| 48 | fprintf(stderr, "\n"); |
| 49 | exit(1); |
| 50 | va_end(ap); |
| 51 | } |
| 52 | |
| 53 | static void format_print(void *opaque, const char *name) |
| 54 | { |
| 55 | printf(" %s", name); |
| 56 | } |
| 57 | |
blueswir1 | d2c639d | 2009-01-24 18:19:25 +0000 | [diff] [blame] | 58 | /* Please keep in synch with qemu-img.texi */ |
pbrook | 3f379ab | 2007-11-11 03:33:13 +0000 | [diff] [blame] | 59 | static void help(void) |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 60 | { |
Paolo Bonzini | e00291c | 2010-02-04 16:49:56 +0100 | [diff] [blame^] | 61 | const char *help_msg = |
| 62 | "qemu-img version " QEMU_VERSION ", Copyright (c) 2004-2008 Fabrice Bellard\n" |
malc | 3f020d7 | 2010-02-08 12:04:56 +0300 | [diff] [blame] | 63 | "usage: qemu-img command [command options]\n" |
| 64 | "QEMU disk image utility\n" |
| 65 | "\n" |
| 66 | "Command syntax:\n" |
Stuart Brady | 153859b | 2009-06-07 00:42:17 +0100 | [diff] [blame] | 67 | #define DEF(option, callback, arg_string) \ |
| 68 | " " arg_string "\n" |
| 69 | #include "qemu-img-cmds.h" |
| 70 | #undef DEF |
| 71 | #undef GEN_DOCS |
malc | 3f020d7 | 2010-02-08 12:04:56 +0300 | [diff] [blame] | 72 | "\n" |
| 73 | "Command parameters:\n" |
| 74 | " 'filename' is a disk image filename\n" |
| 75 | " 'fmt' is the disk image format. It is guessed automatically in most cases\n" |
| 76 | " 'size' is the disk image size in bytes. Optional suffixes\n" |
| 77 | " 'k' or 'K' (kilobyte, 1024), 'M' (megabyte, 1024k), 'G' (gigabyte, 1024M)\n" |
| 78 | " and T (terabyte, 1024G) are supported. 'b' is ignored.\n" |
| 79 | " 'output_filename' is the destination disk image filename\n" |
| 80 | " 'output_fmt' is the destination format\n" |
| 81 | " 'options' is a comma separated list of format specific options in a\n" |
| 82 | " name=value format. Use -o ? for an overview of the options supported by the\n" |
| 83 | " used format\n" |
| 84 | " '-c' indicates that target image must be compressed (qcow format only)\n" |
| 85 | " '-u' enables unsafe rebasing. It is assumed that old and new backing file\n" |
| 86 | " match exactly. The image doesn't need a working backing file before\n" |
| 87 | " rebasing in this case (useful for renaming the backing file)\n" |
| 88 | " '-h' with or without a command shows this help and lists the supported formats\n" |
| 89 | "\n" |
| 90 | "Parameters to snapshot subcommand:\n" |
| 91 | " 'snapshot' is the name of the snapshot to create, apply or delete\n" |
| 92 | " '-a' applies a snapshot (revert disk to saved state)\n" |
| 93 | " '-c' creates a snapshot\n" |
| 94 | " '-d' deletes a snapshot\n" |
Paolo Bonzini | e00291c | 2010-02-04 16:49:56 +0100 | [diff] [blame^] | 95 | " '-l' lists all snapshots in the given image\n"; |
| 96 | |
| 97 | printf("%s\nSupported formats:", help_msg); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 98 | bdrv_iterate_format(format_print, NULL); |
| 99 | printf("\n"); |
| 100 | exit(1); |
| 101 | } |
| 102 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 103 | #if defined(WIN32) |
| 104 | /* XXX: put correct support for win32 */ |
| 105 | static int read_password(char *buf, int buf_size) |
| 106 | { |
| 107 | int c, i; |
| 108 | printf("Password: "); |
| 109 | fflush(stdout); |
| 110 | i = 0; |
| 111 | for(;;) { |
| 112 | c = getchar(); |
| 113 | if (c == '\n') |
| 114 | break; |
| 115 | if (i < (buf_size - 1)) |
| 116 | buf[i++] = c; |
| 117 | } |
| 118 | buf[i] = '\0'; |
| 119 | return 0; |
| 120 | } |
| 121 | |
| 122 | #else |
| 123 | |
| 124 | #include <termios.h> |
| 125 | |
| 126 | static struct termios oldtty; |
| 127 | |
| 128 | static void term_exit(void) |
| 129 | { |
| 130 | tcsetattr (0, TCSANOW, &oldtty); |
| 131 | } |
| 132 | |
| 133 | static void term_init(void) |
| 134 | { |
| 135 | struct termios tty; |
| 136 | |
| 137 | tcgetattr (0, &tty); |
| 138 | oldtty = tty; |
| 139 | |
| 140 | tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP |
| 141 | |INLCR|IGNCR|ICRNL|IXON); |
| 142 | tty.c_oflag |= OPOST; |
| 143 | tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN); |
| 144 | tty.c_cflag &= ~(CSIZE|PARENB); |
| 145 | tty.c_cflag |= CS8; |
| 146 | tty.c_cc[VMIN] = 1; |
| 147 | tty.c_cc[VTIME] = 0; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 148 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 149 | tcsetattr (0, TCSANOW, &tty); |
| 150 | |
| 151 | atexit(term_exit); |
| 152 | } |
| 153 | |
pbrook | 3f379ab | 2007-11-11 03:33:13 +0000 | [diff] [blame] | 154 | static int read_password(char *buf, int buf_size) |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 155 | { |
| 156 | uint8_t ch; |
| 157 | int i, ret; |
| 158 | |
| 159 | printf("password: "); |
| 160 | fflush(stdout); |
| 161 | term_init(); |
| 162 | i = 0; |
| 163 | for(;;) { |
| 164 | ret = read(0, &ch, 1); |
| 165 | if (ret == -1) { |
| 166 | if (errno == EAGAIN || errno == EINTR) { |
| 167 | continue; |
| 168 | } else { |
| 169 | ret = -1; |
| 170 | break; |
| 171 | } |
| 172 | } else if (ret == 0) { |
| 173 | ret = -1; |
| 174 | break; |
| 175 | } else { |
| 176 | if (ch == '\r') { |
| 177 | ret = 0; |
| 178 | break; |
| 179 | } |
| 180 | if (i < (buf_size - 1)) |
| 181 | buf[i++] = ch; |
| 182 | } |
| 183 | } |
| 184 | term_exit(); |
| 185 | buf[i] = '\0'; |
| 186 | printf("\n"); |
| 187 | return ret; |
| 188 | } |
| 189 | #endif |
| 190 | |
bellard | 75c2380 | 2004-08-27 21:28:58 +0000 | [diff] [blame] | 191 | static BlockDriverState *bdrv_new_open(const char *filename, |
| 192 | const char *fmt) |
| 193 | { |
| 194 | BlockDriverState *bs; |
| 195 | BlockDriver *drv; |
| 196 | char password[256]; |
| 197 | |
| 198 | bs = bdrv_new(""); |
| 199 | if (!bs) |
| 200 | error("Not enough memory"); |
| 201 | if (fmt) { |
| 202 | drv = bdrv_find_format(fmt); |
| 203 | if (!drv) |
| 204 | error("Unknown file format '%s'", fmt); |
| 205 | } else { |
| 206 | drv = NULL; |
| 207 | } |
Naphtali Sprei | f5edb01 | 2010-01-17 16:48:13 +0200 | [diff] [blame] | 208 | if (bdrv_open2(bs, filename, BRDV_O_FLAGS | BDRV_O_RDWR, drv) < 0) { |
bellard | 75c2380 | 2004-08-27 21:28:58 +0000 | [diff] [blame] | 209 | error("Could not open '%s'", filename); |
| 210 | } |
| 211 | if (bdrv_is_encrypted(bs)) { |
| 212 | printf("Disk image '%s' is encrypted.\n", filename); |
| 213 | if (read_password(password, sizeof(password)) < 0) |
| 214 | error("No password given"); |
| 215 | if (bdrv_set_key(bs, password) < 0) |
| 216 | error("invalid password"); |
| 217 | } |
| 218 | return bs; |
| 219 | } |
| 220 | |
Kevin Wolf | efa84d4 | 2009-05-18 16:42:12 +0200 | [diff] [blame] | 221 | static void add_old_style_options(const char *fmt, QEMUOptionParameter *list, |
| 222 | int flags, const char *base_filename, const char *base_fmt) |
| 223 | { |
| 224 | if (flags & BLOCK_FLAG_ENCRYPT) { |
| 225 | if (set_option_parameter(list, BLOCK_OPT_ENCRYPT, "on")) { |
| 226 | error("Encryption not supported for file format '%s'", fmt); |
| 227 | } |
| 228 | } |
| 229 | if (flags & BLOCK_FLAG_COMPAT6) { |
| 230 | if (set_option_parameter(list, BLOCK_OPT_COMPAT6, "on")) { |
| 231 | error("VMDK version 6 not supported for file format '%s'", fmt); |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | if (base_filename) { |
| 236 | if (set_option_parameter(list, BLOCK_OPT_BACKING_FILE, base_filename)) { |
| 237 | error("Backing file not supported for file format '%s'", fmt); |
| 238 | } |
| 239 | } |
| 240 | if (base_fmt) { |
| 241 | if (set_option_parameter(list, BLOCK_OPT_BACKING_FMT, base_fmt)) { |
| 242 | error("Backing file format not supported for file format '%s'", fmt); |
| 243 | } |
| 244 | } |
| 245 | } |
| 246 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 247 | static int img_create(int argc, char **argv) |
| 248 | { |
ths | ec36ba1 | 2007-09-16 21:59:02 +0000 | [diff] [blame] | 249 | int c, ret, flags; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 250 | const char *fmt = "raw"; |
aliguori | 9230eaf | 2009-03-28 17:55:19 +0000 | [diff] [blame] | 251 | const char *base_fmt = NULL; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 252 | const char *filename; |
| 253 | const char *base_filename = NULL; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 254 | BlockDriver *drv; |
Kevin Wolf | 9ea2ea7 | 2009-05-18 16:42:11 +0200 | [diff] [blame] | 255 | QEMUOptionParameter *param = NULL; |
| 256 | char *options = NULL; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 257 | |
ths | ec36ba1 | 2007-09-16 21:59:02 +0000 | [diff] [blame] | 258 | flags = 0; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 259 | for(;;) { |
Kevin Wolf | 9ea2ea7 | 2009-05-18 16:42:11 +0200 | [diff] [blame] | 260 | c = getopt(argc, argv, "F:b:f:he6o:"); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 261 | if (c == -1) |
| 262 | break; |
| 263 | switch(c) { |
| 264 | case 'h': |
| 265 | help(); |
| 266 | break; |
aliguori | 9230eaf | 2009-03-28 17:55:19 +0000 | [diff] [blame] | 267 | case 'F': |
| 268 | base_fmt = optarg; |
| 269 | break; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 270 | case 'b': |
| 271 | base_filename = optarg; |
| 272 | break; |
| 273 | case 'f': |
| 274 | fmt = optarg; |
| 275 | break; |
| 276 | case 'e': |
ths | ec36ba1 | 2007-09-16 21:59:02 +0000 | [diff] [blame] | 277 | flags |= BLOCK_FLAG_ENCRYPT; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 278 | break; |
ths | d8871c5 | 2007-10-24 16:11:42 +0000 | [diff] [blame] | 279 | case '6': |
ths | ec36ba1 | 2007-09-16 21:59:02 +0000 | [diff] [blame] | 280 | flags |= BLOCK_FLAG_COMPAT6; |
ths | d8871c5 | 2007-10-24 16:11:42 +0000 | [diff] [blame] | 281 | break; |
Kevin Wolf | 9ea2ea7 | 2009-05-18 16:42:11 +0200 | [diff] [blame] | 282 | case 'o': |
| 283 | options = optarg; |
| 284 | break; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 285 | } |
| 286 | } |
aliguori | 9230eaf | 2009-03-28 17:55:19 +0000 | [diff] [blame] | 287 | |
Kevin Wolf | 9ea2ea7 | 2009-05-18 16:42:11 +0200 | [diff] [blame] | 288 | /* Find driver and parse its options */ |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 289 | drv = bdrv_find_format(fmt); |
| 290 | if (!drv) |
| 291 | error("Unknown file format '%s'", fmt); |
Kevin Wolf | 9ea2ea7 | 2009-05-18 16:42:11 +0200 | [diff] [blame] | 292 | |
Kevin Wolf | db08adf | 2009-06-04 15:39:38 +0200 | [diff] [blame] | 293 | if (options && !strcmp(options, "?")) { |
| 294 | print_option_help(drv->create_options); |
| 295 | return 0; |
| 296 | } |
| 297 | |
Kevin Wolf | 9f56640 | 2009-10-28 11:36:07 +0100 | [diff] [blame] | 298 | /* Create parameter list with default values */ |
| 299 | param = parse_option_parameters("", drv->create_options, param); |
| 300 | set_option_parameter_int(param, BLOCK_OPT_SIZE, -1); |
| 301 | |
| 302 | /* Parse -o options */ |
Kevin Wolf | 9ea2ea7 | 2009-05-18 16:42:11 +0200 | [diff] [blame] | 303 | if (options) { |
| 304 | param = parse_option_parameters(options, drv->create_options, param); |
| 305 | if (param == NULL) { |
| 306 | error("Invalid options for file format '%s'.", fmt); |
| 307 | } |
bellard | 75c2380 | 2004-08-27 21:28:58 +0000 | [diff] [blame] | 308 | } |
Kevin Wolf | 9ea2ea7 | 2009-05-18 16:42:11 +0200 | [diff] [blame] | 309 | |
Kevin Wolf | db08adf | 2009-06-04 15:39:38 +0200 | [diff] [blame] | 310 | /* Get the filename */ |
| 311 | if (optind >= argc) |
| 312 | help(); |
| 313 | filename = argv[optind++]; |
| 314 | |
Kevin Wolf | 9ea2ea7 | 2009-05-18 16:42:11 +0200 | [diff] [blame] | 315 | /* Add size to parameters */ |
| 316 | if (optind < argc) { |
| 317 | set_option_parameter(param, BLOCK_OPT_SIZE, argv[optind++]); |
| 318 | } |
| 319 | |
| 320 | /* Add old-style options to parameters */ |
Kevin Wolf | efa84d4 | 2009-05-18 16:42:12 +0200 | [diff] [blame] | 321 | add_old_style_options(fmt, param, flags, base_filename, base_fmt); |
Kevin Wolf | 9ea2ea7 | 2009-05-18 16:42:11 +0200 | [diff] [blame] | 322 | |
| 323 | // The size for the image must always be specified, with one exception: |
| 324 | // If we are using a backing file, we can obtain the size from there |
Kevin Wolf | 9f56640 | 2009-10-28 11:36:07 +0100 | [diff] [blame] | 325 | if (get_option_parameter(param, BLOCK_OPT_SIZE)->value.n == -1) { |
Kevin Wolf | 9ea2ea7 | 2009-05-18 16:42:11 +0200 | [diff] [blame] | 326 | |
| 327 | QEMUOptionParameter *backing_file = |
| 328 | get_option_parameter(param, BLOCK_OPT_BACKING_FILE); |
| 329 | QEMUOptionParameter *backing_fmt = |
| 330 | get_option_parameter(param, BLOCK_OPT_BACKING_FMT); |
| 331 | |
| 332 | if (backing_file && backing_file->value.s) { |
| 333 | BlockDriverState *bs; |
| 334 | uint64_t size; |
| 335 | const char *fmt = NULL; |
| 336 | char buf[32]; |
| 337 | |
| 338 | if (backing_fmt && backing_fmt->value.s) { |
| 339 | if (bdrv_find_format(backing_fmt->value.s)) { |
| 340 | fmt = backing_fmt->value.s; |
| 341 | } else { |
| 342 | error("Unknown backing file format '%s'", |
| 343 | backing_fmt->value.s); |
| 344 | } |
| 345 | } |
| 346 | |
| 347 | bs = bdrv_new_open(backing_file->value.s, fmt); |
| 348 | bdrv_get_geometry(bs, &size); |
| 349 | size *= 512; |
| 350 | bdrv_delete(bs); |
| 351 | |
| 352 | snprintf(buf, sizeof(buf), "%" PRId64, size); |
| 353 | set_option_parameter(param, BLOCK_OPT_SIZE, buf); |
| 354 | } else { |
| 355 | error("Image creation needs a size parameter"); |
| 356 | } |
| 357 | } |
| 358 | |
| 359 | printf("Formatting '%s', fmt=%s ", filename, fmt); |
| 360 | print_option_parameters(param); |
| 361 | puts(""); |
| 362 | |
| 363 | ret = bdrv_create(drv, filename, param); |
| 364 | free_option_parameters(param); |
| 365 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 366 | if (ret < 0) { |
| 367 | if (ret == -ENOTSUP) { |
bellard | 3c56521 | 2004-09-29 21:29:14 +0000 | [diff] [blame] | 368 | error("Formatting or formatting option not supported for file format '%s'", fmt); |
aurel32 | 6e9ea0c | 2009-04-15 14:42:46 +0000 | [diff] [blame] | 369 | } else if (ret == -EFBIG) { |
| 370 | error("The image size is too large for file format '%s'", fmt); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 371 | } else { |
| 372 | error("Error while formatting"); |
| 373 | } |
| 374 | } |
| 375 | return 0; |
| 376 | } |
| 377 | |
aliguori | 1585969 | 2009-04-21 23:11:53 +0000 | [diff] [blame] | 378 | static int img_check(int argc, char **argv) |
| 379 | { |
| 380 | int c, ret; |
| 381 | const char *filename, *fmt; |
| 382 | BlockDriver *drv; |
| 383 | BlockDriverState *bs; |
| 384 | |
| 385 | fmt = NULL; |
| 386 | for(;;) { |
| 387 | c = getopt(argc, argv, "f:h"); |
| 388 | if (c == -1) |
| 389 | break; |
| 390 | switch(c) { |
| 391 | case 'h': |
| 392 | help(); |
| 393 | break; |
| 394 | case 'f': |
| 395 | fmt = optarg; |
| 396 | break; |
| 397 | } |
| 398 | } |
| 399 | if (optind >= argc) |
| 400 | help(); |
| 401 | filename = argv[optind++]; |
| 402 | |
| 403 | bs = bdrv_new(""); |
| 404 | if (!bs) |
| 405 | error("Not enough memory"); |
| 406 | if (fmt) { |
| 407 | drv = bdrv_find_format(fmt); |
| 408 | if (!drv) |
| 409 | error("Unknown file format '%s'", fmt); |
| 410 | } else { |
| 411 | drv = NULL; |
| 412 | } |
| 413 | if (bdrv_open2(bs, filename, BRDV_O_FLAGS, drv) < 0) { |
| 414 | error("Could not open '%s'", filename); |
| 415 | } |
| 416 | ret = bdrv_check(bs); |
| 417 | switch(ret) { |
| 418 | case 0: |
| 419 | printf("No errors were found on the image.\n"); |
| 420 | break; |
| 421 | case -ENOTSUP: |
| 422 | error("This image format does not support checks"); |
| 423 | break; |
| 424 | default: |
| 425 | if (ret < 0) { |
| 426 | error("An error occurred during the check"); |
| 427 | } else { |
| 428 | printf("%d errors were found on the image.\n", ret); |
| 429 | } |
| 430 | break; |
| 431 | } |
| 432 | |
| 433 | bdrv_delete(bs); |
| 434 | return 0; |
| 435 | } |
| 436 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 437 | static int img_commit(int argc, char **argv) |
| 438 | { |
| 439 | int c, ret; |
| 440 | const char *filename, *fmt; |
| 441 | BlockDriver *drv; |
| 442 | BlockDriverState *bs; |
| 443 | |
| 444 | fmt = NULL; |
| 445 | for(;;) { |
| 446 | c = getopt(argc, argv, "f:h"); |
| 447 | if (c == -1) |
| 448 | break; |
| 449 | switch(c) { |
| 450 | case 'h': |
| 451 | help(); |
| 452 | break; |
| 453 | case 'f': |
| 454 | fmt = optarg; |
| 455 | break; |
| 456 | } |
| 457 | } |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 458 | if (optind >= argc) |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 459 | help(); |
| 460 | filename = argv[optind++]; |
| 461 | |
| 462 | bs = bdrv_new(""); |
| 463 | if (!bs) |
| 464 | error("Not enough memory"); |
| 465 | if (fmt) { |
| 466 | drv = bdrv_find_format(fmt); |
| 467 | if (!drv) |
| 468 | error("Unknown file format '%s'", fmt); |
| 469 | } else { |
| 470 | drv = NULL; |
| 471 | } |
Naphtali Sprei | f5edb01 | 2010-01-17 16:48:13 +0200 | [diff] [blame] | 472 | if (bdrv_open2(bs, filename, BRDV_O_FLAGS | BDRV_O_RDWR, drv) < 0) { |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 473 | error("Could not open '%s'", filename); |
| 474 | } |
| 475 | ret = bdrv_commit(bs); |
| 476 | switch(ret) { |
| 477 | case 0: |
| 478 | printf("Image committed.\n"); |
| 479 | break; |
| 480 | case -ENOENT: |
| 481 | error("No disk inserted"); |
| 482 | break; |
| 483 | case -EACCES: |
| 484 | error("Image is read-only"); |
| 485 | break; |
| 486 | case -ENOTSUP: |
| 487 | error("Image is already committed"); |
| 488 | break; |
| 489 | default: |
| 490 | error("Error while committing image"); |
| 491 | break; |
| 492 | } |
| 493 | |
| 494 | bdrv_delete(bs); |
| 495 | return 0; |
| 496 | } |
| 497 | |
| 498 | static int is_not_zero(const uint8_t *sector, int len) |
| 499 | { |
| 500 | int i; |
| 501 | len >>= 2; |
| 502 | for(i = 0;i < len; i++) { |
| 503 | if (((uint32_t *)sector)[i] != 0) |
| 504 | return 1; |
| 505 | } |
| 506 | return 0; |
| 507 | } |
| 508 | |
ths | f58c7b3 | 2008-06-05 21:53:49 +0000 | [diff] [blame] | 509 | /* |
| 510 | * Returns true iff the first sector pointed to by 'buf' contains at least |
| 511 | * a non-NUL byte. |
| 512 | * |
| 513 | * 'pnum' is set to the number of sectors (including and immediately following |
| 514 | * the first one) that are known to be in the same allocated/unallocated state. |
| 515 | */ |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 516 | static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) |
| 517 | { |
| 518 | int v, i; |
| 519 | |
| 520 | if (n <= 0) { |
| 521 | *pnum = 0; |
| 522 | return 0; |
| 523 | } |
| 524 | v = is_not_zero(buf, 512); |
| 525 | for(i = 1; i < n; i++) { |
| 526 | buf += 512; |
| 527 | if (v != is_not_zero(buf, 512)) |
| 528 | break; |
| 529 | } |
| 530 | *pnum = i; |
| 531 | return v; |
| 532 | } |
| 533 | |
Kevin Wolf | 3e85c6f | 2010-01-12 12:55:18 +0100 | [diff] [blame] | 534 | /* |
| 535 | * Compares two buffers sector by sector. Returns 0 if the first sector of both |
| 536 | * buffers matches, non-zero otherwise. |
| 537 | * |
| 538 | * pnum is set to the number of sectors (including and immediately following |
| 539 | * the first one) that are known to have the same comparison result |
| 540 | */ |
| 541 | static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n, |
| 542 | int *pnum) |
| 543 | { |
| 544 | int res, i; |
| 545 | |
| 546 | if (n <= 0) { |
| 547 | *pnum = 0; |
| 548 | return 0; |
| 549 | } |
| 550 | |
| 551 | res = !!memcmp(buf1, buf2, 512); |
| 552 | for(i = 1; i < n; i++) { |
| 553 | buf1 += 512; |
| 554 | buf2 += 512; |
| 555 | |
| 556 | if (!!memcmp(buf1, buf2, 512) != res) { |
| 557 | break; |
| 558 | } |
| 559 | } |
| 560 | |
| 561 | *pnum = i; |
| 562 | return res; |
| 563 | } |
| 564 | |
Kevin Wolf | 80ee15a | 2009-09-15 12:30:43 +0200 | [diff] [blame] | 565 | #define IO_BUF_SIZE (2 * 1024 * 1024) |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 566 | |
| 567 | static int img_convert(int argc, char **argv) |
| 568 | { |
balrog | 926c2d2 | 2007-10-31 01:11:44 +0000 | [diff] [blame] | 569 | int c, ret, n, n1, bs_n, bs_i, flags, cluster_size, cluster_sectors; |
ths | f58c7b3 | 2008-06-05 21:53:49 +0000 | [diff] [blame] | 570 | const char *fmt, *out_fmt, *out_baseimg, *out_filename; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 571 | BlockDriver *drv; |
balrog | 926c2d2 | 2007-10-31 01:11:44 +0000 | [diff] [blame] | 572 | BlockDriverState **bs, *out_bs; |
ths | 96b8f13 | 2007-12-17 01:35:20 +0000 | [diff] [blame] | 573 | int64_t total_sectors, nb_sectors, sector_num, bs_offset; |
| 574 | uint64_t bs_sectors; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 575 | uint8_t buf[IO_BUF_SIZE]; |
| 576 | const uint8_t *buf1; |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 577 | BlockDriverInfo bdi; |
Kevin Wolf | efa84d4 | 2009-05-18 16:42:12 +0200 | [diff] [blame] | 578 | QEMUOptionParameter *param = NULL; |
| 579 | char *options = NULL; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 580 | |
| 581 | fmt = NULL; |
| 582 | out_fmt = "raw"; |
ths | f58c7b3 | 2008-06-05 21:53:49 +0000 | [diff] [blame] | 583 | out_baseimg = NULL; |
ths | ec36ba1 | 2007-09-16 21:59:02 +0000 | [diff] [blame] | 584 | flags = 0; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 585 | for(;;) { |
Kevin Wolf | efa84d4 | 2009-05-18 16:42:12 +0200 | [diff] [blame] | 586 | c = getopt(argc, argv, "f:O:B:hce6o:"); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 587 | if (c == -1) |
| 588 | break; |
| 589 | switch(c) { |
| 590 | case 'h': |
| 591 | help(); |
| 592 | break; |
| 593 | case 'f': |
| 594 | fmt = optarg; |
| 595 | break; |
| 596 | case 'O': |
| 597 | out_fmt = optarg; |
| 598 | break; |
ths | f58c7b3 | 2008-06-05 21:53:49 +0000 | [diff] [blame] | 599 | case 'B': |
| 600 | out_baseimg = optarg; |
| 601 | break; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 602 | case 'c': |
ths | ec36ba1 | 2007-09-16 21:59:02 +0000 | [diff] [blame] | 603 | flags |= BLOCK_FLAG_COMPRESS; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 604 | break; |
| 605 | case 'e': |
ths | ec36ba1 | 2007-09-16 21:59:02 +0000 | [diff] [blame] | 606 | flags |= BLOCK_FLAG_ENCRYPT; |
| 607 | break; |
| 608 | case '6': |
| 609 | flags |= BLOCK_FLAG_COMPAT6; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 610 | break; |
Kevin Wolf | efa84d4 | 2009-05-18 16:42:12 +0200 | [diff] [blame] | 611 | case 'o': |
| 612 | options = optarg; |
| 613 | break; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 614 | } |
| 615 | } |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 616 | |
balrog | 926c2d2 | 2007-10-31 01:11:44 +0000 | [diff] [blame] | 617 | bs_n = argc - optind - 1; |
| 618 | if (bs_n < 1) help(); |
| 619 | |
| 620 | out_filename = argv[argc - 1]; |
ths | f58c7b3 | 2008-06-05 21:53:49 +0000 | [diff] [blame] | 621 | |
| 622 | if (bs_n > 1 && out_baseimg) |
| 623 | error("-B makes no sense when concatenating multiple input images"); |
balrog | 926c2d2 | 2007-10-31 01:11:44 +0000 | [diff] [blame] | 624 | |
| 625 | bs = calloc(bs_n, sizeof(BlockDriverState *)); |
| 626 | if (!bs) |
| 627 | error("Out of memory"); |
| 628 | |
| 629 | total_sectors = 0; |
| 630 | for (bs_i = 0; bs_i < bs_n; bs_i++) { |
| 631 | bs[bs_i] = bdrv_new_open(argv[optind + bs_i], fmt); |
| 632 | if (!bs[bs_i]) |
| 633 | error("Could not open '%s'", argv[optind + bs_i]); |
| 634 | bdrv_get_geometry(bs[bs_i], &bs_sectors); |
| 635 | total_sectors += bs_sectors; |
| 636 | } |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 637 | |
Kevin Wolf | efa84d4 | 2009-05-18 16:42:12 +0200 | [diff] [blame] | 638 | /* Find driver and parse its options */ |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 639 | drv = bdrv_find_format(out_fmt); |
| 640 | if (!drv) |
ths | d34dda5 | 2007-02-10 22:59:40 +0000 | [diff] [blame] | 641 | error("Unknown file format '%s'", out_fmt); |
balrog | 926c2d2 | 2007-10-31 01:11:44 +0000 | [diff] [blame] | 642 | |
Kevin Wolf | db08adf | 2009-06-04 15:39:38 +0200 | [diff] [blame] | 643 | if (options && !strcmp(options, "?")) { |
| 644 | print_option_help(drv->create_options); |
Kevin Wolf | 7078dea | 2009-11-18 10:48:01 +0100 | [diff] [blame] | 645 | free(bs); |
Kevin Wolf | db08adf | 2009-06-04 15:39:38 +0200 | [diff] [blame] | 646 | return 0; |
| 647 | } |
| 648 | |
Kevin Wolf | efa84d4 | 2009-05-18 16:42:12 +0200 | [diff] [blame] | 649 | if (options) { |
| 650 | param = parse_option_parameters(options, drv->create_options, param); |
| 651 | if (param == NULL) { |
| 652 | error("Invalid options for file format '%s'.", out_fmt); |
| 653 | } |
| 654 | } else { |
| 655 | param = parse_option_parameters("", drv->create_options, param); |
| 656 | } |
| 657 | |
| 658 | set_option_parameter_int(param, BLOCK_OPT_SIZE, total_sectors * 512); |
| 659 | add_old_style_options(out_fmt, param, flags, out_baseimg, NULL); |
| 660 | |
| 661 | /* Check if compression is supported */ |
| 662 | if (flags & BLOCK_FLAG_COMPRESS) { |
| 663 | QEMUOptionParameter *encryption = |
| 664 | get_option_parameter(param, BLOCK_OPT_ENCRYPT); |
| 665 | |
| 666 | if (!drv->bdrv_write_compressed) { |
| 667 | error("Compression not supported for this file format"); |
| 668 | } |
| 669 | |
| 670 | if (encryption && encryption->value.n) { |
| 671 | error("Compression and encryption not supported at the same time"); |
| 672 | } |
| 673 | } |
| 674 | |
| 675 | /* Create the new image */ |
| 676 | ret = bdrv_create(drv, out_filename, param); |
| 677 | free_option_parameters(param); |
| 678 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 679 | if (ret < 0) { |
| 680 | if (ret == -ENOTSUP) { |
aliguori | 93c65b4 | 2009-04-05 17:40:43 +0000 | [diff] [blame] | 681 | error("Formatting not supported for file format '%s'", out_fmt); |
aurel32 | 6e9ea0c | 2009-04-15 14:42:46 +0000 | [diff] [blame] | 682 | } else if (ret == -EFBIG) { |
| 683 | error("The image size is too large for file format '%s'", out_fmt); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 684 | } else { |
| 685 | error("Error while formatting '%s'", out_filename); |
| 686 | } |
| 687 | } |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 688 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 689 | out_bs = bdrv_new_open(out_filename, out_fmt); |
| 690 | |
balrog | 926c2d2 | 2007-10-31 01:11:44 +0000 | [diff] [blame] | 691 | bs_i = 0; |
| 692 | bs_offset = 0; |
| 693 | bdrv_get_geometry(bs[0], &bs_sectors); |
| 694 | |
| 695 | if (flags & BLOCK_FLAG_COMPRESS) { |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 696 | if (bdrv_get_info(out_bs, &bdi) < 0) |
| 697 | error("could not get block driver info"); |
| 698 | cluster_size = bdi.cluster_size; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 699 | if (cluster_size <= 0 || cluster_size > IO_BUF_SIZE) |
| 700 | error("invalid cluster size"); |
| 701 | cluster_sectors = cluster_size >> 9; |
| 702 | sector_num = 0; |
| 703 | for(;;) { |
balrog | 926c2d2 | 2007-10-31 01:11:44 +0000 | [diff] [blame] | 704 | int64_t bs_num; |
| 705 | int remainder; |
| 706 | uint8_t *buf2; |
| 707 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 708 | nb_sectors = total_sectors - sector_num; |
| 709 | if (nb_sectors <= 0) |
| 710 | break; |
| 711 | if (nb_sectors >= cluster_sectors) |
| 712 | n = cluster_sectors; |
| 713 | else |
| 714 | n = nb_sectors; |
balrog | 926c2d2 | 2007-10-31 01:11:44 +0000 | [diff] [blame] | 715 | |
| 716 | bs_num = sector_num - bs_offset; |
| 717 | assert (bs_num >= 0); |
| 718 | remainder = n; |
| 719 | buf2 = buf; |
| 720 | while (remainder > 0) { |
| 721 | int nlow; |
| 722 | while (bs_num == bs_sectors) { |
| 723 | bs_i++; |
| 724 | assert (bs_i < bs_n); |
| 725 | bs_offset += bs_sectors; |
| 726 | bdrv_get_geometry(bs[bs_i], &bs_sectors); |
| 727 | bs_num = 0; |
| 728 | /* printf("changing part: sector_num=%lld, " |
| 729 | "bs_i=%d, bs_offset=%lld, bs_sectors=%lld\n", |
| 730 | sector_num, bs_i, bs_offset, bs_sectors); */ |
| 731 | } |
| 732 | assert (bs_num < bs_sectors); |
| 733 | |
| 734 | nlow = (remainder > bs_sectors - bs_num) ? bs_sectors - bs_num : remainder; |
| 735 | |
| 736 | if (bdrv_read(bs[bs_i], bs_num, buf2, nlow) < 0) |
| 737 | error("error while reading"); |
| 738 | |
| 739 | buf2 += nlow * 512; |
| 740 | bs_num += nlow; |
| 741 | |
| 742 | remainder -= nlow; |
| 743 | } |
| 744 | assert (remainder == 0); |
| 745 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 746 | if (n < cluster_sectors) |
| 747 | memset(buf + n * 512, 0, cluster_size - n * 512); |
| 748 | if (is_not_zero(buf, cluster_size)) { |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 749 | if (bdrv_write_compressed(out_bs, sector_num, buf, |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 750 | cluster_sectors) != 0) |
bellard | ec3757d | 2006-06-14 15:50:07 +0000 | [diff] [blame] | 751 | error("error while compressing sector %" PRId64, |
| 752 | sector_num); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 753 | } |
| 754 | sector_num += n; |
| 755 | } |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 756 | /* signal EOF to align */ |
| 757 | bdrv_write_compressed(out_bs, 0, NULL, 0); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 758 | } else { |
ths | f58c7b3 | 2008-06-05 21:53:49 +0000 | [diff] [blame] | 759 | sector_num = 0; // total number of sectors converted so far |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 760 | for(;;) { |
| 761 | nb_sectors = total_sectors - sector_num; |
| 762 | if (nb_sectors <= 0) |
| 763 | break; |
| 764 | if (nb_sectors >= (IO_BUF_SIZE / 512)) |
| 765 | n = (IO_BUF_SIZE / 512); |
| 766 | else |
| 767 | n = nb_sectors; |
balrog | 926c2d2 | 2007-10-31 01:11:44 +0000 | [diff] [blame] | 768 | |
| 769 | while (sector_num - bs_offset >= bs_sectors) { |
| 770 | bs_i ++; |
| 771 | assert (bs_i < bs_n); |
| 772 | bs_offset += bs_sectors; |
| 773 | bdrv_get_geometry(bs[bs_i], &bs_sectors); |
| 774 | /* printf("changing part: sector_num=%lld, bs_i=%d, " |
| 775 | "bs_offset=%lld, bs_sectors=%lld\n", |
| 776 | sector_num, bs_i, bs_offset, bs_sectors); */ |
| 777 | } |
| 778 | |
| 779 | if (n > bs_offset + bs_sectors - sector_num) |
| 780 | n = bs_offset + bs_sectors - sector_num; |
| 781 | |
Kevin Wolf | 12c09b8 | 2009-11-30 16:54:15 +0100 | [diff] [blame] | 782 | if (!drv->no_zero_init) { |
Akkarit Sangpetch | d032044 | 2009-07-17 10:02:15 +0200 | [diff] [blame] | 783 | /* If the output image is being created as a copy on write image, |
| 784 | assume that sectors which are unallocated in the input image |
| 785 | are present in both the output's and input's base images (no |
| 786 | need to copy them). */ |
| 787 | if (out_baseimg) { |
| 788 | if (!bdrv_is_allocated(bs[bs_i], sector_num - bs_offset, |
| 789 | n, &n1)) { |
| 790 | sector_num += n1; |
| 791 | continue; |
| 792 | } |
| 793 | /* The next 'n1' sectors are allocated in the input image. Copy |
| 794 | only those as they may be followed by unallocated sectors. */ |
| 795 | n = n1; |
aliguori | 93c65b4 | 2009-04-05 17:40:43 +0000 | [diff] [blame] | 796 | } |
aliguori | 93c65b4 | 2009-04-05 17:40:43 +0000 | [diff] [blame] | 797 | } else { |
| 798 | n1 = n; |
ths | f58c7b3 | 2008-06-05 21:53:49 +0000 | [diff] [blame] | 799 | } |
| 800 | |
balrog | 926c2d2 | 2007-10-31 01:11:44 +0000 | [diff] [blame] | 801 | if (bdrv_read(bs[bs_i], sector_num - bs_offset, buf, n) < 0) |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 802 | error("error while reading"); |
| 803 | /* NOTE: at the same time we convert, we do not write zero |
| 804 | sectors to have a chance to compress the image. Ideally, we |
| 805 | should add a specific call to have the info to go faster */ |
| 806 | buf1 = buf; |
| 807 | while (n > 0) { |
ths | f58c7b3 | 2008-06-05 21:53:49 +0000 | [diff] [blame] | 808 | /* If the output image is being created as a copy on write image, |
| 809 | copy all sectors even the ones containing only NUL bytes, |
aliguori | 93c65b4 | 2009-04-05 17:40:43 +0000 | [diff] [blame] | 810 | because they may differ from the sectors in the base image. |
| 811 | |
| 812 | If the output is to a host device, we also write out |
| 813 | sectors that are entirely 0, since whatever data was |
| 814 | already there is garbage, not 0s. */ |
Kevin Wolf | 12c09b8 | 2009-11-30 16:54:15 +0100 | [diff] [blame] | 815 | if (drv->no_zero_init || out_baseimg || |
aliguori | 93c65b4 | 2009-04-05 17:40:43 +0000 | [diff] [blame] | 816 | is_allocated_sectors(buf1, n, &n1)) { |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 817 | if (bdrv_write(out_bs, sector_num, buf1, n1) < 0) |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 818 | error("error while writing"); |
| 819 | } |
| 820 | sector_num += n1; |
| 821 | n -= n1; |
| 822 | buf1 += n1 * 512; |
| 823 | } |
| 824 | } |
| 825 | } |
| 826 | bdrv_delete(out_bs); |
balrog | 926c2d2 | 2007-10-31 01:11:44 +0000 | [diff] [blame] | 827 | for (bs_i = 0; bs_i < bs_n; bs_i++) |
| 828 | bdrv_delete(bs[bs_i]); |
| 829 | free(bs); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 830 | return 0; |
| 831 | } |
| 832 | |
bellard | 57d1a2b | 2004-08-03 21:15:11 +0000 | [diff] [blame] | 833 | #ifdef _WIN32 |
| 834 | static int64_t get_allocated_file_size(const char *filename) |
| 835 | { |
bellard | e844533 | 2006-06-14 15:32:10 +0000 | [diff] [blame] | 836 | typedef DWORD (WINAPI * get_compressed_t)(const char *filename, DWORD *high); |
| 837 | get_compressed_t get_compressed; |
bellard | 57d1a2b | 2004-08-03 21:15:11 +0000 | [diff] [blame] | 838 | struct _stati64 st; |
bellard | e844533 | 2006-06-14 15:32:10 +0000 | [diff] [blame] | 839 | |
| 840 | /* WinNT support GetCompressedFileSize to determine allocate size */ |
| 841 | get_compressed = (get_compressed_t) GetProcAddress(GetModuleHandle("kernel32"), "GetCompressedFileSizeA"); |
| 842 | if (get_compressed) { |
| 843 | DWORD high, low; |
| 844 | low = get_compressed(filename, &high); |
| 845 | if (low != 0xFFFFFFFFlu || GetLastError() == NO_ERROR) |
| 846 | return (((int64_t) high) << 32) + low; |
| 847 | } |
| 848 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 849 | if (_stati64(filename, &st) < 0) |
bellard | 57d1a2b | 2004-08-03 21:15:11 +0000 | [diff] [blame] | 850 | return -1; |
| 851 | return st.st_size; |
| 852 | } |
| 853 | #else |
| 854 | static int64_t get_allocated_file_size(const char *filename) |
| 855 | { |
| 856 | struct stat st; |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 857 | if (stat(filename, &st) < 0) |
bellard | 57d1a2b | 2004-08-03 21:15:11 +0000 | [diff] [blame] | 858 | return -1; |
| 859 | return (int64_t)st.st_blocks * 512; |
| 860 | } |
| 861 | #endif |
| 862 | |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 863 | static void dump_snapshots(BlockDriverState *bs) |
| 864 | { |
| 865 | QEMUSnapshotInfo *sn_tab, *sn; |
| 866 | int nb_sns, i; |
| 867 | char buf[256]; |
| 868 | |
| 869 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
| 870 | if (nb_sns <= 0) |
| 871 | return; |
| 872 | printf("Snapshot list:\n"); |
| 873 | printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
| 874 | for(i = 0; i < nb_sns; i++) { |
| 875 | sn = &sn_tab[i]; |
| 876 | printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
| 877 | } |
| 878 | qemu_free(sn_tab); |
| 879 | } |
| 880 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 881 | static int img_info(int argc, char **argv) |
| 882 | { |
| 883 | int c; |
| 884 | const char *filename, *fmt; |
| 885 | BlockDriver *drv; |
| 886 | BlockDriverState *bs; |
| 887 | char fmt_name[128], size_buf[128], dsize_buf[128]; |
ths | 96b8f13 | 2007-12-17 01:35:20 +0000 | [diff] [blame] | 888 | uint64_t total_sectors; |
| 889 | int64_t allocated_size; |
bellard | 93b6b2a | 2006-08-01 15:51:11 +0000 | [diff] [blame] | 890 | char backing_filename[1024]; |
| 891 | char backing_filename2[1024]; |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 892 | BlockDriverInfo bdi; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 893 | |
| 894 | fmt = NULL; |
| 895 | for(;;) { |
| 896 | c = getopt(argc, argv, "f:h"); |
| 897 | if (c == -1) |
| 898 | break; |
| 899 | switch(c) { |
| 900 | case 'h': |
| 901 | help(); |
| 902 | break; |
| 903 | case 'f': |
| 904 | fmt = optarg; |
| 905 | break; |
| 906 | } |
| 907 | } |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 908 | if (optind >= argc) |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 909 | help(); |
| 910 | filename = argv[optind++]; |
| 911 | |
| 912 | bs = bdrv_new(""); |
| 913 | if (!bs) |
| 914 | error("Not enough memory"); |
| 915 | if (fmt) { |
| 916 | drv = bdrv_find_format(fmt); |
| 917 | if (!drv) |
| 918 | error("Unknown file format '%s'", fmt); |
| 919 | } else { |
| 920 | drv = NULL; |
| 921 | } |
Kevin Wolf | b783e40 | 2010-01-12 12:55:16 +0100 | [diff] [blame] | 922 | if (bdrv_open2(bs, filename, BRDV_O_FLAGS | BDRV_O_NO_BACKING, drv) < 0) { |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 923 | error("Could not open '%s'", filename); |
| 924 | } |
| 925 | bdrv_get_format(bs, fmt_name, sizeof(fmt_name)); |
| 926 | bdrv_get_geometry(bs, &total_sectors); |
| 927 | get_human_readable_size(size_buf, sizeof(size_buf), total_sectors * 512); |
bellard | 57d1a2b | 2004-08-03 21:15:11 +0000 | [diff] [blame] | 928 | allocated_size = get_allocated_file_size(filename); |
| 929 | if (allocated_size < 0) |
blueswir1 | a10ea30 | 2008-08-24 10:30:33 +0000 | [diff] [blame] | 930 | snprintf(dsize_buf, sizeof(dsize_buf), "unavailable"); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 931 | else |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 932 | get_human_readable_size(dsize_buf, sizeof(dsize_buf), |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 933 | allocated_size); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 934 | printf("image: %s\n" |
| 935 | "file format: %s\n" |
bellard | ec3757d | 2006-06-14 15:50:07 +0000 | [diff] [blame] | 936 | "virtual size: %s (%" PRId64 " bytes)\n" |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 937 | "disk size: %s\n", |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 938 | filename, fmt_name, size_buf, |
bellard | ec3757d | 2006-06-14 15:50:07 +0000 | [diff] [blame] | 939 | (total_sectors * 512), |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 940 | dsize_buf); |
| 941 | if (bdrv_is_encrypted(bs)) |
| 942 | printf("encrypted: yes\n"); |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 943 | if (bdrv_get_info(bs, &bdi) >= 0) { |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 944 | if (bdi.cluster_size != 0) |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 945 | printf("cluster_size: %d\n", bdi.cluster_size); |
| 946 | } |
bellard | 93b6b2a | 2006-08-01 15:51:11 +0000 | [diff] [blame] | 947 | bdrv_get_backing_filename(bs, backing_filename, sizeof(backing_filename)); |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 948 | if (backing_filename[0] != '\0') { |
bellard | 93b6b2a | 2006-08-01 15:51:11 +0000 | [diff] [blame] | 949 | path_combine(backing_filename2, sizeof(backing_filename2), |
| 950 | filename, backing_filename); |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 951 | printf("backing file: %s (actual path: %s)\n", |
bellard | 93b6b2a | 2006-08-01 15:51:11 +0000 | [diff] [blame] | 952 | backing_filename, |
| 953 | backing_filename2); |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 954 | } |
| 955 | dump_snapshots(bs); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 956 | bdrv_delete(bs); |
| 957 | return 0; |
| 958 | } |
| 959 | |
aliguori | f7b4a94 | 2009-01-07 17:40:15 +0000 | [diff] [blame] | 960 | #define SNAPSHOT_LIST 1 |
| 961 | #define SNAPSHOT_CREATE 2 |
| 962 | #define SNAPSHOT_APPLY 3 |
| 963 | #define SNAPSHOT_DELETE 4 |
| 964 | |
Stuart Brady | 153859b | 2009-06-07 00:42:17 +0100 | [diff] [blame] | 965 | static int img_snapshot(int argc, char **argv) |
aliguori | f7b4a94 | 2009-01-07 17:40:15 +0000 | [diff] [blame] | 966 | { |
| 967 | BlockDriverState *bs; |
| 968 | QEMUSnapshotInfo sn; |
| 969 | char *filename, *snapshot_name = NULL; |
Naphtali Sprei | f5edb01 | 2010-01-17 16:48:13 +0200 | [diff] [blame] | 970 | int c, ret, bdrv_oflags; |
aliguori | f7b4a94 | 2009-01-07 17:40:15 +0000 | [diff] [blame] | 971 | int action = 0; |
| 972 | qemu_timeval tv; |
| 973 | |
Naphtali Sprei | f5edb01 | 2010-01-17 16:48:13 +0200 | [diff] [blame] | 974 | bdrv_oflags = BDRV_O_RDWR; |
aliguori | f7b4a94 | 2009-01-07 17:40:15 +0000 | [diff] [blame] | 975 | /* Parse commandline parameters */ |
| 976 | for(;;) { |
| 977 | c = getopt(argc, argv, "la:c:d:h"); |
| 978 | if (c == -1) |
| 979 | break; |
| 980 | switch(c) { |
| 981 | case 'h': |
| 982 | help(); |
Stuart Brady | 153859b | 2009-06-07 00:42:17 +0100 | [diff] [blame] | 983 | return 0; |
aliguori | f7b4a94 | 2009-01-07 17:40:15 +0000 | [diff] [blame] | 984 | case 'l': |
| 985 | if (action) { |
| 986 | help(); |
Stuart Brady | 153859b | 2009-06-07 00:42:17 +0100 | [diff] [blame] | 987 | return 0; |
aliguori | f7b4a94 | 2009-01-07 17:40:15 +0000 | [diff] [blame] | 988 | } |
| 989 | action = SNAPSHOT_LIST; |
Naphtali Sprei | f5edb01 | 2010-01-17 16:48:13 +0200 | [diff] [blame] | 990 | bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */ |
aliguori | f7b4a94 | 2009-01-07 17:40:15 +0000 | [diff] [blame] | 991 | break; |
| 992 | case 'a': |
| 993 | if (action) { |
| 994 | help(); |
Stuart Brady | 153859b | 2009-06-07 00:42:17 +0100 | [diff] [blame] | 995 | return 0; |
aliguori | f7b4a94 | 2009-01-07 17:40:15 +0000 | [diff] [blame] | 996 | } |
| 997 | action = SNAPSHOT_APPLY; |
| 998 | snapshot_name = optarg; |
| 999 | break; |
| 1000 | case 'c': |
| 1001 | if (action) { |
| 1002 | help(); |
Stuart Brady | 153859b | 2009-06-07 00:42:17 +0100 | [diff] [blame] | 1003 | return 0; |
aliguori | f7b4a94 | 2009-01-07 17:40:15 +0000 | [diff] [blame] | 1004 | } |
| 1005 | action = SNAPSHOT_CREATE; |
| 1006 | snapshot_name = optarg; |
| 1007 | break; |
| 1008 | case 'd': |
| 1009 | if (action) { |
| 1010 | help(); |
Stuart Brady | 153859b | 2009-06-07 00:42:17 +0100 | [diff] [blame] | 1011 | return 0; |
aliguori | f7b4a94 | 2009-01-07 17:40:15 +0000 | [diff] [blame] | 1012 | } |
| 1013 | action = SNAPSHOT_DELETE; |
| 1014 | snapshot_name = optarg; |
| 1015 | break; |
| 1016 | } |
| 1017 | } |
| 1018 | |
| 1019 | if (optind >= argc) |
| 1020 | help(); |
| 1021 | filename = argv[optind++]; |
| 1022 | |
| 1023 | /* Open the image */ |
| 1024 | bs = bdrv_new(""); |
| 1025 | if (!bs) |
| 1026 | error("Not enough memory"); |
| 1027 | |
Naphtali Sprei | f5edb01 | 2010-01-17 16:48:13 +0200 | [diff] [blame] | 1028 | if (bdrv_open2(bs, filename, bdrv_oflags, NULL) < 0) { |
aliguori | f7b4a94 | 2009-01-07 17:40:15 +0000 | [diff] [blame] | 1029 | error("Could not open '%s'", filename); |
| 1030 | } |
| 1031 | |
| 1032 | /* Perform the requested action */ |
| 1033 | switch(action) { |
| 1034 | case SNAPSHOT_LIST: |
| 1035 | dump_snapshots(bs); |
| 1036 | break; |
| 1037 | |
| 1038 | case SNAPSHOT_CREATE: |
| 1039 | memset(&sn, 0, sizeof(sn)); |
| 1040 | pstrcpy(sn.name, sizeof(sn.name), snapshot_name); |
| 1041 | |
| 1042 | qemu_gettimeofday(&tv); |
| 1043 | sn.date_sec = tv.tv_sec; |
| 1044 | sn.date_nsec = tv.tv_usec * 1000; |
| 1045 | |
| 1046 | ret = bdrv_snapshot_create(bs, &sn); |
| 1047 | if (ret) |
| 1048 | error("Could not create snapshot '%s': %d (%s)", |
| 1049 | snapshot_name, ret, strerror(-ret)); |
| 1050 | break; |
| 1051 | |
| 1052 | case SNAPSHOT_APPLY: |
| 1053 | ret = bdrv_snapshot_goto(bs, snapshot_name); |
| 1054 | if (ret) |
| 1055 | error("Could not apply snapshot '%s': %d (%s)", |
| 1056 | snapshot_name, ret, strerror(-ret)); |
| 1057 | break; |
| 1058 | |
| 1059 | case SNAPSHOT_DELETE: |
| 1060 | ret = bdrv_snapshot_delete(bs, snapshot_name); |
| 1061 | if (ret) |
| 1062 | error("Could not delete snapshot '%s': %d (%s)", |
| 1063 | snapshot_name, ret, strerror(-ret)); |
| 1064 | break; |
| 1065 | } |
| 1066 | |
| 1067 | /* Cleanup */ |
| 1068 | bdrv_delete(bs); |
Stuart Brady | 153859b | 2009-06-07 00:42:17 +0100 | [diff] [blame] | 1069 | |
| 1070 | return 0; |
aliguori | f7b4a94 | 2009-01-07 17:40:15 +0000 | [diff] [blame] | 1071 | } |
| 1072 | |
Kevin Wolf | 3e85c6f | 2010-01-12 12:55:18 +0100 | [diff] [blame] | 1073 | static int img_rebase(int argc, char **argv) |
| 1074 | { |
| 1075 | BlockDriverState *bs, *bs_old_backing, *bs_new_backing; |
| 1076 | BlockDriver *old_backing_drv, *new_backing_drv; |
| 1077 | char *filename; |
| 1078 | const char *out_basefmt, *out_baseimg; |
| 1079 | int c, flags, ret; |
| 1080 | int unsafe = 0; |
| 1081 | |
| 1082 | /* Parse commandline parameters */ |
| 1083 | out_baseimg = NULL; |
| 1084 | out_basefmt = NULL; |
| 1085 | |
| 1086 | for(;;) { |
| 1087 | c = getopt(argc, argv, "uhF:b:"); |
| 1088 | if (c == -1) |
| 1089 | break; |
| 1090 | switch(c) { |
| 1091 | case 'h': |
| 1092 | help(); |
| 1093 | return 0; |
| 1094 | case 'F': |
| 1095 | out_basefmt = optarg; |
| 1096 | break; |
| 1097 | case 'b': |
| 1098 | out_baseimg = optarg; |
| 1099 | break; |
| 1100 | case 'u': |
| 1101 | unsafe = 1; |
| 1102 | break; |
| 1103 | } |
| 1104 | } |
| 1105 | |
| 1106 | if ((optind >= argc) || !out_baseimg) |
| 1107 | help(); |
| 1108 | filename = argv[optind++]; |
| 1109 | |
| 1110 | /* |
| 1111 | * Open the images. |
| 1112 | * |
| 1113 | * Ignore the old backing file for unsafe rebase in case we want to correct |
| 1114 | * the reference to a renamed or moved backing file. |
| 1115 | */ |
| 1116 | bs = bdrv_new(""); |
| 1117 | if (!bs) |
| 1118 | error("Not enough memory"); |
| 1119 | |
Naphtali Sprei | 058fc8c | 2010-01-21 14:40:39 +0200 | [diff] [blame] | 1120 | flags = BRDV_O_FLAGS | BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0); |
Kevin Wolf | 3e85c6f | 2010-01-12 12:55:18 +0100 | [diff] [blame] | 1121 | if (bdrv_open2(bs, filename, flags, NULL) < 0) { |
| 1122 | error("Could not open '%s'", filename); |
| 1123 | } |
| 1124 | |
| 1125 | /* Find the right drivers for the backing files */ |
| 1126 | old_backing_drv = NULL; |
| 1127 | new_backing_drv = NULL; |
| 1128 | |
| 1129 | if (!unsafe && bs->backing_format[0] != '\0') { |
| 1130 | old_backing_drv = bdrv_find_format(bs->backing_format); |
| 1131 | if (old_backing_drv == NULL) { |
| 1132 | error("Invalid format name: '%s'", bs->backing_format); |
| 1133 | } |
| 1134 | } |
| 1135 | |
| 1136 | if (out_basefmt != NULL) { |
| 1137 | new_backing_drv = bdrv_find_format(out_basefmt); |
| 1138 | if (new_backing_drv == NULL) { |
| 1139 | error("Invalid format name: '%s'", out_basefmt); |
| 1140 | } |
| 1141 | } |
| 1142 | |
| 1143 | /* For safe rebasing we need to compare old and new backing file */ |
| 1144 | if (unsafe) { |
| 1145 | /* Make the compiler happy */ |
| 1146 | bs_old_backing = NULL; |
| 1147 | bs_new_backing = NULL; |
| 1148 | } else { |
| 1149 | char backing_name[1024]; |
| 1150 | |
| 1151 | bs_old_backing = bdrv_new("old_backing"); |
| 1152 | bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); |
| 1153 | if (bdrv_open2(bs_old_backing, backing_name, BRDV_O_FLAGS, |
| 1154 | old_backing_drv)) |
| 1155 | { |
| 1156 | error("Could not open old backing file '%s'", backing_name); |
| 1157 | return -1; |
| 1158 | } |
| 1159 | |
| 1160 | bs_new_backing = bdrv_new("new_backing"); |
Naphtali Sprei | 058fc8c | 2010-01-21 14:40:39 +0200 | [diff] [blame] | 1161 | if (bdrv_open2(bs_new_backing, out_baseimg, BRDV_O_FLAGS | BDRV_O_RDWR, |
Kevin Wolf | 3e85c6f | 2010-01-12 12:55:18 +0100 | [diff] [blame] | 1162 | new_backing_drv)) |
| 1163 | { |
| 1164 | error("Could not open new backing file '%s'", backing_name); |
| 1165 | return -1; |
| 1166 | } |
| 1167 | } |
| 1168 | |
| 1169 | /* |
| 1170 | * Check each unallocated cluster in the COW file. If it is unallocated, |
| 1171 | * accesses go to the backing file. We must therefore compare this cluster |
| 1172 | * in the old and new backing file, and if they differ we need to copy it |
| 1173 | * from the old backing file into the COW file. |
| 1174 | * |
| 1175 | * If qemu-img crashes during this step, no harm is done. The content of |
| 1176 | * the image is the same as the original one at any time. |
| 1177 | */ |
| 1178 | if (!unsafe) { |
| 1179 | uint64_t num_sectors; |
| 1180 | uint64_t sector; |
| 1181 | int n, n1; |
| 1182 | uint8_t buf_old[IO_BUF_SIZE]; |
| 1183 | uint8_t buf_new[IO_BUF_SIZE]; |
| 1184 | |
| 1185 | bdrv_get_geometry(bs, &num_sectors); |
| 1186 | |
| 1187 | for (sector = 0; sector < num_sectors; sector += n) { |
| 1188 | |
| 1189 | /* How many sectors can we handle with the next read? */ |
| 1190 | if (sector + (IO_BUF_SIZE / 512) <= num_sectors) { |
| 1191 | n = (IO_BUF_SIZE / 512); |
| 1192 | } else { |
| 1193 | n = num_sectors - sector; |
| 1194 | } |
| 1195 | |
| 1196 | /* If the cluster is allocated, we don't need to take action */ |
| 1197 | if (bdrv_is_allocated(bs, sector, n, &n1)) { |
| 1198 | n = n1; |
| 1199 | continue; |
| 1200 | } |
| 1201 | |
| 1202 | /* Read old and new backing file */ |
| 1203 | if (bdrv_read(bs_old_backing, sector, buf_old, n) < 0) { |
| 1204 | error("error while reading from old backing file"); |
| 1205 | } |
| 1206 | if (bdrv_read(bs_new_backing, sector, buf_new, n) < 0) { |
| 1207 | error("error while reading from new backing file"); |
| 1208 | } |
| 1209 | |
| 1210 | /* If they differ, we need to write to the COW file */ |
| 1211 | uint64_t written = 0; |
| 1212 | |
| 1213 | while (written < n) { |
| 1214 | int pnum; |
| 1215 | |
| 1216 | if (compare_sectors(buf_old + written * 512, |
| 1217 | buf_new + written * 512, n, &pnum)) |
| 1218 | { |
| 1219 | ret = bdrv_write(bs, sector + written, |
| 1220 | buf_old + written * 512, pnum); |
| 1221 | if (ret < 0) { |
| 1222 | error("Error while writing to COW image: %s", |
| 1223 | strerror(-ret)); |
| 1224 | } |
| 1225 | } |
| 1226 | |
| 1227 | written += pnum; |
| 1228 | } |
| 1229 | } |
| 1230 | } |
| 1231 | |
| 1232 | /* |
| 1233 | * Change the backing file. All clusters that are different from the old |
| 1234 | * backing file are overwritten in the COW file now, so the visible content |
| 1235 | * doesn't change when we switch the backing file. |
| 1236 | */ |
| 1237 | ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt); |
| 1238 | if (ret == -ENOSPC) { |
| 1239 | error("Could not change the backing file to '%s': No space left in " |
| 1240 | "the file header", out_baseimg); |
| 1241 | } else if (ret < 0) { |
| 1242 | error("Could not change the backing file to '%s': %s", |
| 1243 | out_baseimg, strerror(-ret)); |
| 1244 | } |
| 1245 | |
| 1246 | /* |
| 1247 | * TODO At this point it is possible to check if any clusters that are |
| 1248 | * allocated in the COW file are the same in the backing file. If so, they |
| 1249 | * could be dropped from the COW file. Don't do this before switching the |
| 1250 | * backing file, in case of a crash this would lead to corruption. |
| 1251 | */ |
| 1252 | |
| 1253 | /* Cleanup */ |
| 1254 | if (!unsafe) { |
| 1255 | bdrv_delete(bs_old_backing); |
| 1256 | bdrv_delete(bs_new_backing); |
| 1257 | } |
| 1258 | |
| 1259 | bdrv_delete(bs); |
| 1260 | |
| 1261 | return 0; |
| 1262 | } |
| 1263 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 1264 | static const img_cmd_t img_cmds[] = { |
Stuart Brady | 153859b | 2009-06-07 00:42:17 +0100 | [diff] [blame] | 1265 | #define DEF(option, callback, arg_string) \ |
| 1266 | { option, callback }, |
| 1267 | #include "qemu-img-cmds.h" |
| 1268 | #undef DEF |
| 1269 | #undef GEN_DOCS |
| 1270 | { NULL, NULL, }, |
| 1271 | }; |
| 1272 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1273 | int main(int argc, char **argv) |
| 1274 | { |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 1275 | const img_cmd_t *cmd; |
Stuart Brady | 153859b | 2009-06-07 00:42:17 +0100 | [diff] [blame] | 1276 | const char *cmdname; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1277 | |
| 1278 | bdrv_init(); |
| 1279 | if (argc < 2) |
| 1280 | help(); |
Stuart Brady | 153859b | 2009-06-07 00:42:17 +0100 | [diff] [blame] | 1281 | cmdname = argv[1]; |
aurel32 | 8f9b157 | 2009-02-09 18:14:31 +0000 | [diff] [blame] | 1282 | argc--; argv++; |
Stuart Brady | 153859b | 2009-06-07 00:42:17 +0100 | [diff] [blame] | 1283 | |
| 1284 | /* find the command */ |
| 1285 | for(cmd = img_cmds; cmd->name != NULL; cmd++) { |
| 1286 | if (!strcmp(cmdname, cmd->name)) { |
| 1287 | return cmd->handler(argc, argv); |
| 1288 | } |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1289 | } |
Stuart Brady | 153859b | 2009-06-07 00:42:17 +0100 | [diff] [blame] | 1290 | |
| 1291 | /* not found */ |
| 1292 | help(); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1293 | return 0; |
| 1294 | } |