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. */ |
Stefan Hajnoczi | adfe078 | 2010-04-13 10:29:35 +0100 | [diff] [blame] | 40 | #define BDRV_O_FLAGS BDRV_O_CACHE_WB |
aurel32 | 137519c | 2008-11-30 19:12:49 +0000 | [diff] [blame] | 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, |
Sheng Yang | 9bc378c | 2010-01-29 10:15:06 +0800 | [diff] [blame] | 192 | const char *fmt, |
Stefan Hajnoczi | f163d07 | 2010-04-13 10:29:34 +0100 | [diff] [blame] | 193 | int flags) |
bellard | 75c2380 | 2004-08-27 21:28:58 +0000 | [diff] [blame] | 194 | { |
| 195 | BlockDriverState *bs; |
| 196 | BlockDriver *drv; |
| 197 | char password[256]; |
| 198 | |
| 199 | bs = bdrv_new(""); |
| 200 | if (!bs) |
| 201 | error("Not enough memory"); |
| 202 | if (fmt) { |
| 203 | drv = bdrv_find_format(fmt); |
| 204 | if (!drv) |
| 205 | error("Unknown file format '%s'", fmt); |
| 206 | } else { |
| 207 | drv = NULL; |
| 208 | } |
Kevin Wolf | d6e9098 | 2010-03-31 14:40:27 +0200 | [diff] [blame] | 209 | if (bdrv_open(bs, filename, flags, drv) < 0) { |
bellard | 75c2380 | 2004-08-27 21:28:58 +0000 | [diff] [blame] | 210 | error("Could not open '%s'", filename); |
| 211 | } |
| 212 | if (bdrv_is_encrypted(bs)) { |
| 213 | printf("Disk image '%s' is encrypted.\n", filename); |
| 214 | if (read_password(password, sizeof(password)) < 0) |
| 215 | error("No password given"); |
| 216 | if (bdrv_set_key(bs, password) < 0) |
| 217 | error("invalid password"); |
| 218 | } |
| 219 | return bs; |
| 220 | } |
| 221 | |
Kevin Wolf | efa84d4 | 2009-05-18 16:42:12 +0200 | [diff] [blame] | 222 | static void add_old_style_options(const char *fmt, QEMUOptionParameter *list, |
| 223 | int flags, const char *base_filename, const char *base_fmt) |
| 224 | { |
| 225 | if (flags & BLOCK_FLAG_ENCRYPT) { |
| 226 | if (set_option_parameter(list, BLOCK_OPT_ENCRYPT, "on")) { |
| 227 | error("Encryption not supported for file format '%s'", fmt); |
| 228 | } |
| 229 | } |
| 230 | if (flags & BLOCK_FLAG_COMPAT6) { |
| 231 | if (set_option_parameter(list, BLOCK_OPT_COMPAT6, "on")) { |
| 232 | error("VMDK version 6 not supported for file format '%s'", fmt); |
| 233 | } |
| 234 | } |
| 235 | |
| 236 | if (base_filename) { |
| 237 | if (set_option_parameter(list, BLOCK_OPT_BACKING_FILE, base_filename)) { |
| 238 | error("Backing file not supported for file format '%s'", fmt); |
| 239 | } |
| 240 | } |
| 241 | if (base_fmt) { |
| 242 | if (set_option_parameter(list, BLOCK_OPT_BACKING_FMT, base_fmt)) { |
| 243 | error("Backing file format not supported for file format '%s'", fmt); |
| 244 | } |
| 245 | } |
| 246 | } |
| 247 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 248 | static int img_create(int argc, char **argv) |
| 249 | { |
ths | ec36ba1 | 2007-09-16 21:59:02 +0000 | [diff] [blame] | 250 | int c, ret, flags; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 251 | const char *fmt = "raw"; |
aliguori | 9230eaf | 2009-03-28 17:55:19 +0000 | [diff] [blame] | 252 | const char *base_fmt = NULL; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 253 | const char *filename; |
| 254 | const char *base_filename = NULL; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 255 | BlockDriver *drv; |
Kevin Wolf | 9ea2ea7 | 2009-05-18 16:42:11 +0200 | [diff] [blame] | 256 | QEMUOptionParameter *param = NULL; |
| 257 | char *options = NULL; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 258 | |
ths | ec36ba1 | 2007-09-16 21:59:02 +0000 | [diff] [blame] | 259 | flags = 0; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 260 | for(;;) { |
Kevin Wolf | 9ea2ea7 | 2009-05-18 16:42:11 +0200 | [diff] [blame] | 261 | c = getopt(argc, argv, "F:b:f:he6o:"); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 262 | if (c == -1) |
| 263 | break; |
| 264 | switch(c) { |
| 265 | case 'h': |
| 266 | help(); |
| 267 | break; |
aliguori | 9230eaf | 2009-03-28 17:55:19 +0000 | [diff] [blame] | 268 | case 'F': |
| 269 | base_fmt = optarg; |
| 270 | break; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 271 | case 'b': |
| 272 | base_filename = optarg; |
| 273 | break; |
| 274 | case 'f': |
| 275 | fmt = optarg; |
| 276 | break; |
| 277 | case 'e': |
ths | ec36ba1 | 2007-09-16 21:59:02 +0000 | [diff] [blame] | 278 | flags |= BLOCK_FLAG_ENCRYPT; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 279 | break; |
ths | d8871c5 | 2007-10-24 16:11:42 +0000 | [diff] [blame] | 280 | case '6': |
ths | ec36ba1 | 2007-09-16 21:59:02 +0000 | [diff] [blame] | 281 | flags |= BLOCK_FLAG_COMPAT6; |
ths | d8871c5 | 2007-10-24 16:11:42 +0000 | [diff] [blame] | 282 | break; |
Kevin Wolf | 9ea2ea7 | 2009-05-18 16:42:11 +0200 | [diff] [blame] | 283 | case 'o': |
| 284 | options = optarg; |
| 285 | break; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 286 | } |
| 287 | } |
aliguori | 9230eaf | 2009-03-28 17:55:19 +0000 | [diff] [blame] | 288 | |
Kevin Wolf | 9ea2ea7 | 2009-05-18 16:42:11 +0200 | [diff] [blame] | 289 | /* Find driver and parse its options */ |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 290 | drv = bdrv_find_format(fmt); |
| 291 | if (!drv) |
| 292 | error("Unknown file format '%s'", fmt); |
Kevin Wolf | 9ea2ea7 | 2009-05-18 16:42:11 +0200 | [diff] [blame] | 293 | |
Kevin Wolf | db08adf | 2009-06-04 15:39:38 +0200 | [diff] [blame] | 294 | if (options && !strcmp(options, "?")) { |
| 295 | print_option_help(drv->create_options); |
| 296 | return 0; |
| 297 | } |
| 298 | |
Kevin Wolf | 9f56640 | 2009-10-28 11:36:07 +0100 | [diff] [blame] | 299 | /* Create parameter list with default values */ |
| 300 | param = parse_option_parameters("", drv->create_options, param); |
| 301 | set_option_parameter_int(param, BLOCK_OPT_SIZE, -1); |
| 302 | |
| 303 | /* Parse -o options */ |
Kevin Wolf | 9ea2ea7 | 2009-05-18 16:42:11 +0200 | [diff] [blame] | 304 | if (options) { |
| 305 | param = parse_option_parameters(options, drv->create_options, param); |
| 306 | if (param == NULL) { |
| 307 | error("Invalid options for file format '%s'.", fmt); |
| 308 | } |
bellard | 75c2380 | 2004-08-27 21:28:58 +0000 | [diff] [blame] | 309 | } |
Kevin Wolf | 9ea2ea7 | 2009-05-18 16:42:11 +0200 | [diff] [blame] | 310 | |
Kevin Wolf | db08adf | 2009-06-04 15:39:38 +0200 | [diff] [blame] | 311 | /* Get the filename */ |
| 312 | if (optind >= argc) |
| 313 | help(); |
| 314 | filename = argv[optind++]; |
| 315 | |
Kevin Wolf | 9ea2ea7 | 2009-05-18 16:42:11 +0200 | [diff] [blame] | 316 | /* Add size to parameters */ |
| 317 | if (optind < argc) { |
| 318 | set_option_parameter(param, BLOCK_OPT_SIZE, argv[optind++]); |
| 319 | } |
| 320 | |
| 321 | /* Add old-style options to parameters */ |
Kevin Wolf | efa84d4 | 2009-05-18 16:42:12 +0200 | [diff] [blame] | 322 | add_old_style_options(fmt, param, flags, base_filename, base_fmt); |
Kevin Wolf | 9ea2ea7 | 2009-05-18 16:42:11 +0200 | [diff] [blame] | 323 | |
| 324 | // The size for the image must always be specified, with one exception: |
| 325 | // 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] | 326 | if (get_option_parameter(param, BLOCK_OPT_SIZE)->value.n == -1) { |
Kevin Wolf | 9ea2ea7 | 2009-05-18 16:42:11 +0200 | [diff] [blame] | 327 | |
| 328 | QEMUOptionParameter *backing_file = |
| 329 | get_option_parameter(param, BLOCK_OPT_BACKING_FILE); |
| 330 | QEMUOptionParameter *backing_fmt = |
| 331 | get_option_parameter(param, BLOCK_OPT_BACKING_FMT); |
| 332 | |
| 333 | if (backing_file && backing_file->value.s) { |
| 334 | BlockDriverState *bs; |
| 335 | uint64_t size; |
| 336 | const char *fmt = NULL; |
| 337 | char buf[32]; |
| 338 | |
| 339 | if (backing_fmt && backing_fmt->value.s) { |
| 340 | if (bdrv_find_format(backing_fmt->value.s)) { |
| 341 | fmt = backing_fmt->value.s; |
| 342 | } else { |
| 343 | error("Unknown backing file format '%s'", |
| 344 | backing_fmt->value.s); |
| 345 | } |
| 346 | } |
| 347 | |
Stefan Hajnoczi | adfe078 | 2010-04-13 10:29:35 +0100 | [diff] [blame] | 348 | bs = bdrv_new_open(backing_file->value.s, fmt, BDRV_O_FLAGS); |
Kevin Wolf | 9ea2ea7 | 2009-05-18 16:42:11 +0200 | [diff] [blame] | 349 | bdrv_get_geometry(bs, &size); |
| 350 | size *= 512; |
| 351 | bdrv_delete(bs); |
| 352 | |
| 353 | snprintf(buf, sizeof(buf), "%" PRId64, size); |
| 354 | set_option_parameter(param, BLOCK_OPT_SIZE, buf); |
| 355 | } else { |
| 356 | error("Image creation needs a size parameter"); |
| 357 | } |
| 358 | } |
| 359 | |
| 360 | printf("Formatting '%s', fmt=%s ", filename, fmt); |
| 361 | print_option_parameters(param); |
| 362 | puts(""); |
| 363 | |
| 364 | ret = bdrv_create(drv, filename, param); |
| 365 | free_option_parameters(param); |
| 366 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 367 | if (ret < 0) { |
| 368 | if (ret == -ENOTSUP) { |
bellard | 3c56521 | 2004-09-29 21:29:14 +0000 | [diff] [blame] | 369 | error("Formatting or formatting option not supported for file format '%s'", fmt); |
aurel32 | 6e9ea0c | 2009-04-15 14:42:46 +0000 | [diff] [blame] | 370 | } else if (ret == -EFBIG) { |
| 371 | error("The image size is too large for file format '%s'", fmt); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 372 | } else { |
Juan Quintela | 3e7896d | 2010-03-04 10:00:38 +0100 | [diff] [blame] | 373 | error("%s: error while creating %s: %s", filename, fmt, strerror(-ret)); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 374 | } |
| 375 | } |
| 376 | return 0; |
| 377 | } |
| 378 | |
aliguori | 1585969 | 2009-04-21 23:11:53 +0000 | [diff] [blame] | 379 | static int img_check(int argc, char **argv) |
| 380 | { |
| 381 | int c, ret; |
| 382 | const char *filename, *fmt; |
aliguori | 1585969 | 2009-04-21 23:11:53 +0000 | [diff] [blame] | 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 | |
Stefan Hajnoczi | adfe078 | 2010-04-13 10:29:35 +0100 | [diff] [blame] | 403 | bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS); |
aliguori | 1585969 | 2009-04-21 23:11:53 +0000 | [diff] [blame] | 404 | ret = bdrv_check(bs); |
| 405 | switch(ret) { |
| 406 | case 0: |
| 407 | printf("No errors were found on the image.\n"); |
| 408 | break; |
| 409 | case -ENOTSUP: |
| 410 | error("This image format does not support checks"); |
| 411 | break; |
| 412 | default: |
| 413 | if (ret < 0) { |
| 414 | error("An error occurred during the check"); |
| 415 | } else { |
| 416 | printf("%d errors were found on the image.\n", ret); |
| 417 | } |
| 418 | break; |
| 419 | } |
| 420 | |
| 421 | bdrv_delete(bs); |
| 422 | return 0; |
| 423 | } |
| 424 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 425 | static int img_commit(int argc, char **argv) |
| 426 | { |
| 427 | int c, ret; |
| 428 | const char *filename, *fmt; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 429 | BlockDriverState *bs; |
| 430 | |
| 431 | fmt = NULL; |
| 432 | for(;;) { |
| 433 | c = getopt(argc, argv, "f:h"); |
| 434 | if (c == -1) |
| 435 | break; |
| 436 | switch(c) { |
| 437 | case 'h': |
| 438 | help(); |
| 439 | break; |
| 440 | case 'f': |
| 441 | fmt = optarg; |
| 442 | break; |
| 443 | } |
| 444 | } |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 445 | if (optind >= argc) |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 446 | help(); |
| 447 | filename = argv[optind++]; |
| 448 | |
Stefan Hajnoczi | adfe078 | 2010-04-13 10:29:35 +0100 | [diff] [blame] | 449 | bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 450 | ret = bdrv_commit(bs); |
| 451 | switch(ret) { |
| 452 | case 0: |
| 453 | printf("Image committed.\n"); |
| 454 | break; |
| 455 | case -ENOENT: |
| 456 | error("No disk inserted"); |
| 457 | break; |
| 458 | case -EACCES: |
| 459 | error("Image is read-only"); |
| 460 | break; |
| 461 | case -ENOTSUP: |
| 462 | error("Image is already committed"); |
| 463 | break; |
| 464 | default: |
| 465 | error("Error while committing image"); |
| 466 | break; |
| 467 | } |
| 468 | |
| 469 | bdrv_delete(bs); |
| 470 | return 0; |
| 471 | } |
| 472 | |
| 473 | static int is_not_zero(const uint8_t *sector, int len) |
| 474 | { |
| 475 | int i; |
| 476 | len >>= 2; |
| 477 | for(i = 0;i < len; i++) { |
| 478 | if (((uint32_t *)sector)[i] != 0) |
| 479 | return 1; |
| 480 | } |
| 481 | return 0; |
| 482 | } |
| 483 | |
ths | f58c7b3 | 2008-06-05 21:53:49 +0000 | [diff] [blame] | 484 | /* |
| 485 | * Returns true iff the first sector pointed to by 'buf' contains at least |
| 486 | * a non-NUL byte. |
| 487 | * |
| 488 | * 'pnum' is set to the number of sectors (including and immediately following |
| 489 | * the first one) that are known to be in the same allocated/unallocated state. |
| 490 | */ |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 491 | static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) |
| 492 | { |
| 493 | int v, i; |
| 494 | |
| 495 | if (n <= 0) { |
| 496 | *pnum = 0; |
| 497 | return 0; |
| 498 | } |
| 499 | v = is_not_zero(buf, 512); |
| 500 | for(i = 1; i < n; i++) { |
| 501 | buf += 512; |
| 502 | if (v != is_not_zero(buf, 512)) |
| 503 | break; |
| 504 | } |
| 505 | *pnum = i; |
| 506 | return v; |
| 507 | } |
| 508 | |
Kevin Wolf | 3e85c6f | 2010-01-12 12:55:18 +0100 | [diff] [blame] | 509 | /* |
| 510 | * Compares two buffers sector by sector. Returns 0 if the first sector of both |
| 511 | * buffers matches, non-zero otherwise. |
| 512 | * |
| 513 | * pnum is set to the number of sectors (including and immediately following |
| 514 | * the first one) that are known to have the same comparison result |
| 515 | */ |
| 516 | static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n, |
| 517 | int *pnum) |
| 518 | { |
| 519 | int res, i; |
| 520 | |
| 521 | if (n <= 0) { |
| 522 | *pnum = 0; |
| 523 | return 0; |
| 524 | } |
| 525 | |
| 526 | res = !!memcmp(buf1, buf2, 512); |
| 527 | for(i = 1; i < n; i++) { |
| 528 | buf1 += 512; |
| 529 | buf2 += 512; |
| 530 | |
| 531 | if (!!memcmp(buf1, buf2, 512) != res) { |
| 532 | break; |
| 533 | } |
| 534 | } |
| 535 | |
| 536 | *pnum = i; |
| 537 | return res; |
| 538 | } |
| 539 | |
Kevin Wolf | 80ee15a | 2009-09-15 12:30:43 +0200 | [diff] [blame] | 540 | #define IO_BUF_SIZE (2 * 1024 * 1024) |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 541 | |
| 542 | static int img_convert(int argc, char **argv) |
| 543 | { |
balrog | 926c2d2 | 2007-10-31 01:11:44 +0000 | [diff] [blame] | 544 | 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] | 545 | const char *fmt, *out_fmt, *out_baseimg, *out_filename; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 546 | BlockDriver *drv; |
balrog | 926c2d2 | 2007-10-31 01:11:44 +0000 | [diff] [blame] | 547 | BlockDriverState **bs, *out_bs; |
ths | 96b8f13 | 2007-12-17 01:35:20 +0000 | [diff] [blame] | 548 | int64_t total_sectors, nb_sectors, sector_num, bs_offset; |
| 549 | uint64_t bs_sectors; |
TeLeMan | d6771bf | 2010-02-08 16:20:00 +0800 | [diff] [blame] | 550 | uint8_t * buf; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 551 | const uint8_t *buf1; |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 552 | BlockDriverInfo bdi; |
Kevin Wolf | efa84d4 | 2009-05-18 16:42:12 +0200 | [diff] [blame] | 553 | QEMUOptionParameter *param = NULL; |
| 554 | char *options = NULL; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 555 | |
| 556 | fmt = NULL; |
| 557 | out_fmt = "raw"; |
ths | f58c7b3 | 2008-06-05 21:53:49 +0000 | [diff] [blame] | 558 | out_baseimg = NULL; |
ths | ec36ba1 | 2007-09-16 21:59:02 +0000 | [diff] [blame] | 559 | flags = 0; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 560 | for(;;) { |
Kevin Wolf | efa84d4 | 2009-05-18 16:42:12 +0200 | [diff] [blame] | 561 | c = getopt(argc, argv, "f:O:B:hce6o:"); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 562 | if (c == -1) |
| 563 | break; |
| 564 | switch(c) { |
| 565 | case 'h': |
| 566 | help(); |
| 567 | break; |
| 568 | case 'f': |
| 569 | fmt = optarg; |
| 570 | break; |
| 571 | case 'O': |
| 572 | out_fmt = optarg; |
| 573 | break; |
ths | f58c7b3 | 2008-06-05 21:53:49 +0000 | [diff] [blame] | 574 | case 'B': |
| 575 | out_baseimg = optarg; |
| 576 | break; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 577 | case 'c': |
ths | ec36ba1 | 2007-09-16 21:59:02 +0000 | [diff] [blame] | 578 | flags |= BLOCK_FLAG_COMPRESS; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 579 | break; |
| 580 | case 'e': |
ths | ec36ba1 | 2007-09-16 21:59:02 +0000 | [diff] [blame] | 581 | flags |= BLOCK_FLAG_ENCRYPT; |
| 582 | break; |
| 583 | case '6': |
| 584 | flags |= BLOCK_FLAG_COMPAT6; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 585 | break; |
Kevin Wolf | efa84d4 | 2009-05-18 16:42:12 +0200 | [diff] [blame] | 586 | case 'o': |
| 587 | options = optarg; |
| 588 | break; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 589 | } |
| 590 | } |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 591 | |
balrog | 926c2d2 | 2007-10-31 01:11:44 +0000 | [diff] [blame] | 592 | bs_n = argc - optind - 1; |
| 593 | if (bs_n < 1) help(); |
| 594 | |
| 595 | out_filename = argv[argc - 1]; |
ths | f58c7b3 | 2008-06-05 21:53:49 +0000 | [diff] [blame] | 596 | |
| 597 | if (bs_n > 1 && out_baseimg) |
| 598 | error("-B makes no sense when concatenating multiple input images"); |
balrog | 926c2d2 | 2007-10-31 01:11:44 +0000 | [diff] [blame] | 599 | |
| 600 | bs = calloc(bs_n, sizeof(BlockDriverState *)); |
| 601 | if (!bs) |
| 602 | error("Out of memory"); |
| 603 | |
| 604 | total_sectors = 0; |
| 605 | for (bs_i = 0; bs_i < bs_n; bs_i++) { |
Stefan Hajnoczi | adfe078 | 2010-04-13 10:29:35 +0100 | [diff] [blame] | 606 | bs[bs_i] = bdrv_new_open(argv[optind + bs_i], fmt, BDRV_O_FLAGS); |
balrog | 926c2d2 | 2007-10-31 01:11:44 +0000 | [diff] [blame] | 607 | if (!bs[bs_i]) |
| 608 | error("Could not open '%s'", argv[optind + bs_i]); |
| 609 | bdrv_get_geometry(bs[bs_i], &bs_sectors); |
| 610 | total_sectors += bs_sectors; |
| 611 | } |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 612 | |
Kevin Wolf | efa84d4 | 2009-05-18 16:42:12 +0200 | [diff] [blame] | 613 | /* Find driver and parse its options */ |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 614 | drv = bdrv_find_format(out_fmt); |
| 615 | if (!drv) |
ths | d34dda5 | 2007-02-10 22:59:40 +0000 | [diff] [blame] | 616 | error("Unknown file format '%s'", out_fmt); |
balrog | 926c2d2 | 2007-10-31 01:11:44 +0000 | [diff] [blame] | 617 | |
Kevin Wolf | db08adf | 2009-06-04 15:39:38 +0200 | [diff] [blame] | 618 | if (options && !strcmp(options, "?")) { |
| 619 | print_option_help(drv->create_options); |
Kevin Wolf | 7078dea | 2009-11-18 10:48:01 +0100 | [diff] [blame] | 620 | free(bs); |
Kevin Wolf | db08adf | 2009-06-04 15:39:38 +0200 | [diff] [blame] | 621 | return 0; |
| 622 | } |
| 623 | |
Kevin Wolf | efa84d4 | 2009-05-18 16:42:12 +0200 | [diff] [blame] | 624 | if (options) { |
| 625 | param = parse_option_parameters(options, drv->create_options, param); |
| 626 | if (param == NULL) { |
| 627 | error("Invalid options for file format '%s'.", out_fmt); |
| 628 | } |
| 629 | } else { |
| 630 | param = parse_option_parameters("", drv->create_options, param); |
| 631 | } |
| 632 | |
| 633 | set_option_parameter_int(param, BLOCK_OPT_SIZE, total_sectors * 512); |
| 634 | add_old_style_options(out_fmt, param, flags, out_baseimg, NULL); |
| 635 | |
| 636 | /* Check if compression is supported */ |
| 637 | if (flags & BLOCK_FLAG_COMPRESS) { |
| 638 | QEMUOptionParameter *encryption = |
| 639 | get_option_parameter(param, BLOCK_OPT_ENCRYPT); |
| 640 | |
| 641 | if (!drv->bdrv_write_compressed) { |
| 642 | error("Compression not supported for this file format"); |
| 643 | } |
| 644 | |
| 645 | if (encryption && encryption->value.n) { |
| 646 | error("Compression and encryption not supported at the same time"); |
| 647 | } |
| 648 | } |
| 649 | |
| 650 | /* Create the new image */ |
| 651 | ret = bdrv_create(drv, out_filename, param); |
| 652 | free_option_parameters(param); |
| 653 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 654 | if (ret < 0) { |
| 655 | if (ret == -ENOTSUP) { |
aliguori | 93c65b4 | 2009-04-05 17:40:43 +0000 | [diff] [blame] | 656 | error("Formatting not supported for file format '%s'", out_fmt); |
aurel32 | 6e9ea0c | 2009-04-15 14:42:46 +0000 | [diff] [blame] | 657 | } else if (ret == -EFBIG) { |
| 658 | error("The image size is too large for file format '%s'", out_fmt); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 659 | } else { |
Juan Quintela | 3e7896d | 2010-03-04 10:00:38 +0100 | [diff] [blame] | 660 | error("%s: error while converting %s: %s", out_filename, out_fmt, strerror(-ret)); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 661 | } |
| 662 | } |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 663 | |
Stefan Hajnoczi | adfe078 | 2010-04-13 10:29:35 +0100 | [diff] [blame] | 664 | out_bs = bdrv_new_open(out_filename, out_fmt, BDRV_O_FLAGS | BDRV_O_RDWR); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 665 | |
balrog | 926c2d2 | 2007-10-31 01:11:44 +0000 | [diff] [blame] | 666 | bs_i = 0; |
| 667 | bs_offset = 0; |
| 668 | bdrv_get_geometry(bs[0], &bs_sectors); |
TeLeMan | d6771bf | 2010-02-08 16:20:00 +0800 | [diff] [blame] | 669 | buf = qemu_malloc(IO_BUF_SIZE); |
balrog | 926c2d2 | 2007-10-31 01:11:44 +0000 | [diff] [blame] | 670 | |
| 671 | if (flags & BLOCK_FLAG_COMPRESS) { |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 672 | if (bdrv_get_info(out_bs, &bdi) < 0) |
| 673 | error("could not get block driver info"); |
| 674 | cluster_size = bdi.cluster_size; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 675 | if (cluster_size <= 0 || cluster_size > IO_BUF_SIZE) |
| 676 | error("invalid cluster size"); |
| 677 | cluster_sectors = cluster_size >> 9; |
| 678 | sector_num = 0; |
| 679 | for(;;) { |
balrog | 926c2d2 | 2007-10-31 01:11:44 +0000 | [diff] [blame] | 680 | int64_t bs_num; |
| 681 | int remainder; |
| 682 | uint8_t *buf2; |
| 683 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 684 | nb_sectors = total_sectors - sector_num; |
| 685 | if (nb_sectors <= 0) |
| 686 | break; |
| 687 | if (nb_sectors >= cluster_sectors) |
| 688 | n = cluster_sectors; |
| 689 | else |
| 690 | n = nb_sectors; |
balrog | 926c2d2 | 2007-10-31 01:11:44 +0000 | [diff] [blame] | 691 | |
| 692 | bs_num = sector_num - bs_offset; |
| 693 | assert (bs_num >= 0); |
| 694 | remainder = n; |
| 695 | buf2 = buf; |
| 696 | while (remainder > 0) { |
| 697 | int nlow; |
| 698 | while (bs_num == bs_sectors) { |
| 699 | bs_i++; |
| 700 | assert (bs_i < bs_n); |
| 701 | bs_offset += bs_sectors; |
| 702 | bdrv_get_geometry(bs[bs_i], &bs_sectors); |
| 703 | bs_num = 0; |
| 704 | /* printf("changing part: sector_num=%lld, " |
| 705 | "bs_i=%d, bs_offset=%lld, bs_sectors=%lld\n", |
| 706 | sector_num, bs_i, bs_offset, bs_sectors); */ |
| 707 | } |
| 708 | assert (bs_num < bs_sectors); |
| 709 | |
| 710 | nlow = (remainder > bs_sectors - bs_num) ? bs_sectors - bs_num : remainder; |
| 711 | |
| 712 | if (bdrv_read(bs[bs_i], bs_num, buf2, nlow) < 0) |
| 713 | error("error while reading"); |
| 714 | |
| 715 | buf2 += nlow * 512; |
| 716 | bs_num += nlow; |
| 717 | |
| 718 | remainder -= nlow; |
| 719 | } |
| 720 | assert (remainder == 0); |
| 721 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 722 | if (n < cluster_sectors) |
| 723 | memset(buf + n * 512, 0, cluster_size - n * 512); |
| 724 | if (is_not_zero(buf, cluster_size)) { |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 725 | if (bdrv_write_compressed(out_bs, sector_num, buf, |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 726 | cluster_sectors) != 0) |
bellard | ec3757d | 2006-06-14 15:50:07 +0000 | [diff] [blame] | 727 | error("error while compressing sector %" PRId64, |
| 728 | sector_num); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 729 | } |
| 730 | sector_num += n; |
| 731 | } |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 732 | /* signal EOF to align */ |
| 733 | bdrv_write_compressed(out_bs, 0, NULL, 0); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 734 | } else { |
Kevin Wolf | f2feebb | 2010-04-14 17:30:35 +0200 | [diff] [blame] | 735 | int has_zero_init = bdrv_has_zero_init(out_bs); |
| 736 | |
ths | f58c7b3 | 2008-06-05 21:53:49 +0000 | [diff] [blame] | 737 | sector_num = 0; // total number of sectors converted so far |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 738 | for(;;) { |
| 739 | nb_sectors = total_sectors - sector_num; |
| 740 | if (nb_sectors <= 0) |
| 741 | break; |
| 742 | if (nb_sectors >= (IO_BUF_SIZE / 512)) |
| 743 | n = (IO_BUF_SIZE / 512); |
| 744 | else |
| 745 | n = nb_sectors; |
balrog | 926c2d2 | 2007-10-31 01:11:44 +0000 | [diff] [blame] | 746 | |
| 747 | while (sector_num - bs_offset >= bs_sectors) { |
| 748 | bs_i ++; |
| 749 | assert (bs_i < bs_n); |
| 750 | bs_offset += bs_sectors; |
| 751 | bdrv_get_geometry(bs[bs_i], &bs_sectors); |
| 752 | /* printf("changing part: sector_num=%lld, bs_i=%d, " |
| 753 | "bs_offset=%lld, bs_sectors=%lld\n", |
| 754 | sector_num, bs_i, bs_offset, bs_sectors); */ |
| 755 | } |
| 756 | |
| 757 | if (n > bs_offset + bs_sectors - sector_num) |
| 758 | n = bs_offset + bs_sectors - sector_num; |
| 759 | |
Kevin Wolf | f2feebb | 2010-04-14 17:30:35 +0200 | [diff] [blame] | 760 | if (has_zero_init) { |
Akkarit Sangpetch | d032044 | 2009-07-17 10:02:15 +0200 | [diff] [blame] | 761 | /* If the output image is being created as a copy on write image, |
| 762 | assume that sectors which are unallocated in the input image |
| 763 | are present in both the output's and input's base images (no |
| 764 | need to copy them). */ |
| 765 | if (out_baseimg) { |
| 766 | if (!bdrv_is_allocated(bs[bs_i], sector_num - bs_offset, |
| 767 | n, &n1)) { |
| 768 | sector_num += n1; |
| 769 | continue; |
| 770 | } |
| 771 | /* The next 'n1' sectors are allocated in the input image. Copy |
| 772 | only those as they may be followed by unallocated sectors. */ |
| 773 | n = n1; |
aliguori | 93c65b4 | 2009-04-05 17:40:43 +0000 | [diff] [blame] | 774 | } |
aliguori | 93c65b4 | 2009-04-05 17:40:43 +0000 | [diff] [blame] | 775 | } else { |
| 776 | n1 = n; |
ths | f58c7b3 | 2008-06-05 21:53:49 +0000 | [diff] [blame] | 777 | } |
| 778 | |
balrog | 926c2d2 | 2007-10-31 01:11:44 +0000 | [diff] [blame] | 779 | if (bdrv_read(bs[bs_i], sector_num - bs_offset, buf, n) < 0) |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 780 | error("error while reading"); |
| 781 | /* NOTE: at the same time we convert, we do not write zero |
| 782 | sectors to have a chance to compress the image. Ideally, we |
| 783 | should add a specific call to have the info to go faster */ |
| 784 | buf1 = buf; |
| 785 | while (n > 0) { |
ths | f58c7b3 | 2008-06-05 21:53:49 +0000 | [diff] [blame] | 786 | /* If the output image is being created as a copy on write image, |
| 787 | copy all sectors even the ones containing only NUL bytes, |
aliguori | 93c65b4 | 2009-04-05 17:40:43 +0000 | [diff] [blame] | 788 | because they may differ from the sectors in the base image. |
| 789 | |
| 790 | If the output is to a host device, we also write out |
| 791 | sectors that are entirely 0, since whatever data was |
| 792 | already there is garbage, not 0s. */ |
Kevin Wolf | f2feebb | 2010-04-14 17:30:35 +0200 | [diff] [blame] | 793 | if (!has_zero_init || out_baseimg || |
aliguori | 93c65b4 | 2009-04-05 17:40:43 +0000 | [diff] [blame] | 794 | is_allocated_sectors(buf1, n, &n1)) { |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 795 | if (bdrv_write(out_bs, sector_num, buf1, n1) < 0) |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 796 | error("error while writing"); |
| 797 | } |
| 798 | sector_num += n1; |
| 799 | n -= n1; |
| 800 | buf1 += n1 * 512; |
| 801 | } |
| 802 | } |
| 803 | } |
TeLeMan | d6771bf | 2010-02-08 16:20:00 +0800 | [diff] [blame] | 804 | qemu_free(buf); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 805 | bdrv_delete(out_bs); |
balrog | 926c2d2 | 2007-10-31 01:11:44 +0000 | [diff] [blame] | 806 | for (bs_i = 0; bs_i < bs_n; bs_i++) |
| 807 | bdrv_delete(bs[bs_i]); |
| 808 | free(bs); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 809 | return 0; |
| 810 | } |
| 811 | |
bellard | 57d1a2b | 2004-08-03 21:15:11 +0000 | [diff] [blame] | 812 | #ifdef _WIN32 |
| 813 | static int64_t get_allocated_file_size(const char *filename) |
| 814 | { |
bellard | e844533 | 2006-06-14 15:32:10 +0000 | [diff] [blame] | 815 | typedef DWORD (WINAPI * get_compressed_t)(const char *filename, DWORD *high); |
| 816 | get_compressed_t get_compressed; |
bellard | 57d1a2b | 2004-08-03 21:15:11 +0000 | [diff] [blame] | 817 | struct _stati64 st; |
bellard | e844533 | 2006-06-14 15:32:10 +0000 | [diff] [blame] | 818 | |
| 819 | /* WinNT support GetCompressedFileSize to determine allocate size */ |
| 820 | get_compressed = (get_compressed_t) GetProcAddress(GetModuleHandle("kernel32"), "GetCompressedFileSizeA"); |
| 821 | if (get_compressed) { |
| 822 | DWORD high, low; |
| 823 | low = get_compressed(filename, &high); |
| 824 | if (low != 0xFFFFFFFFlu || GetLastError() == NO_ERROR) |
| 825 | return (((int64_t) high) << 32) + low; |
| 826 | } |
| 827 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 828 | if (_stati64(filename, &st) < 0) |
bellard | 57d1a2b | 2004-08-03 21:15:11 +0000 | [diff] [blame] | 829 | return -1; |
| 830 | return st.st_size; |
| 831 | } |
| 832 | #else |
| 833 | static int64_t get_allocated_file_size(const char *filename) |
| 834 | { |
| 835 | struct stat st; |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 836 | if (stat(filename, &st) < 0) |
bellard | 57d1a2b | 2004-08-03 21:15:11 +0000 | [diff] [blame] | 837 | return -1; |
| 838 | return (int64_t)st.st_blocks * 512; |
| 839 | } |
| 840 | #endif |
| 841 | |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 842 | static void dump_snapshots(BlockDriverState *bs) |
| 843 | { |
| 844 | QEMUSnapshotInfo *sn_tab, *sn; |
| 845 | int nb_sns, i; |
| 846 | char buf[256]; |
| 847 | |
| 848 | nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
| 849 | if (nb_sns <= 0) |
| 850 | return; |
| 851 | printf("Snapshot list:\n"); |
| 852 | printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
| 853 | for(i = 0; i < nb_sns; i++) { |
| 854 | sn = &sn_tab[i]; |
| 855 | printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
| 856 | } |
| 857 | qemu_free(sn_tab); |
| 858 | } |
| 859 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 860 | static int img_info(int argc, char **argv) |
| 861 | { |
| 862 | int c; |
| 863 | const char *filename, *fmt; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 864 | BlockDriverState *bs; |
| 865 | char fmt_name[128], size_buf[128], dsize_buf[128]; |
ths | 96b8f13 | 2007-12-17 01:35:20 +0000 | [diff] [blame] | 866 | uint64_t total_sectors; |
| 867 | int64_t allocated_size; |
bellard | 93b6b2a | 2006-08-01 15:51:11 +0000 | [diff] [blame] | 868 | char backing_filename[1024]; |
| 869 | char backing_filename2[1024]; |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 870 | BlockDriverInfo bdi; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 871 | |
| 872 | fmt = NULL; |
| 873 | for(;;) { |
| 874 | c = getopt(argc, argv, "f:h"); |
| 875 | if (c == -1) |
| 876 | break; |
| 877 | switch(c) { |
| 878 | case 'h': |
| 879 | help(); |
| 880 | break; |
| 881 | case 'f': |
| 882 | fmt = optarg; |
| 883 | break; |
| 884 | } |
| 885 | } |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 886 | if (optind >= argc) |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 887 | help(); |
| 888 | filename = argv[optind++]; |
| 889 | |
Stefan Hajnoczi | adfe078 | 2010-04-13 10:29:35 +0100 | [diff] [blame] | 890 | bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_NO_BACKING); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 891 | bdrv_get_format(bs, fmt_name, sizeof(fmt_name)); |
| 892 | bdrv_get_geometry(bs, &total_sectors); |
| 893 | get_human_readable_size(size_buf, sizeof(size_buf), total_sectors * 512); |
bellard | 57d1a2b | 2004-08-03 21:15:11 +0000 | [diff] [blame] | 894 | allocated_size = get_allocated_file_size(filename); |
| 895 | if (allocated_size < 0) |
blueswir1 | a10ea30 | 2008-08-24 10:30:33 +0000 | [diff] [blame] | 896 | snprintf(dsize_buf, sizeof(dsize_buf), "unavailable"); |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 897 | else |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 898 | get_human_readable_size(dsize_buf, sizeof(dsize_buf), |
bellard | de167e4 | 2005-04-28 21:15:08 +0000 | [diff] [blame] | 899 | allocated_size); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 900 | printf("image: %s\n" |
| 901 | "file format: %s\n" |
bellard | ec3757d | 2006-06-14 15:50:07 +0000 | [diff] [blame] | 902 | "virtual size: %s (%" PRId64 " bytes)\n" |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 903 | "disk size: %s\n", |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 904 | filename, fmt_name, size_buf, |
bellard | ec3757d | 2006-06-14 15:50:07 +0000 | [diff] [blame] | 905 | (total_sectors * 512), |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 906 | dsize_buf); |
| 907 | if (bdrv_is_encrypted(bs)) |
| 908 | printf("encrypted: yes\n"); |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 909 | if (bdrv_get_info(bs, &bdi) >= 0) { |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 910 | if (bdi.cluster_size != 0) |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 911 | printf("cluster_size: %d\n", bdi.cluster_size); |
| 912 | } |
bellard | 93b6b2a | 2006-08-01 15:51:11 +0000 | [diff] [blame] | 913 | bdrv_get_backing_filename(bs, backing_filename, sizeof(backing_filename)); |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 914 | if (backing_filename[0] != '\0') { |
bellard | 93b6b2a | 2006-08-01 15:51:11 +0000 | [diff] [blame] | 915 | path_combine(backing_filename2, sizeof(backing_filename2), |
| 916 | filename, backing_filename); |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 917 | printf("backing file: %s (actual path: %s)\n", |
bellard | 93b6b2a | 2006-08-01 15:51:11 +0000 | [diff] [blame] | 918 | backing_filename, |
| 919 | backing_filename2); |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 920 | } |
| 921 | dump_snapshots(bs); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 922 | bdrv_delete(bs); |
| 923 | return 0; |
| 924 | } |
| 925 | |
aliguori | f7b4a94 | 2009-01-07 17:40:15 +0000 | [diff] [blame] | 926 | #define SNAPSHOT_LIST 1 |
| 927 | #define SNAPSHOT_CREATE 2 |
| 928 | #define SNAPSHOT_APPLY 3 |
| 929 | #define SNAPSHOT_DELETE 4 |
| 930 | |
Stuart Brady | 153859b | 2009-06-07 00:42:17 +0100 | [diff] [blame] | 931 | static int img_snapshot(int argc, char **argv) |
aliguori | f7b4a94 | 2009-01-07 17:40:15 +0000 | [diff] [blame] | 932 | { |
| 933 | BlockDriverState *bs; |
| 934 | QEMUSnapshotInfo sn; |
| 935 | char *filename, *snapshot_name = NULL; |
Naphtali Sprei | f5edb01 | 2010-01-17 16:48:13 +0200 | [diff] [blame] | 936 | int c, ret, bdrv_oflags; |
aliguori | f7b4a94 | 2009-01-07 17:40:15 +0000 | [diff] [blame] | 937 | int action = 0; |
| 938 | qemu_timeval tv; |
| 939 | |
Naphtali Sprei | f5edb01 | 2010-01-17 16:48:13 +0200 | [diff] [blame] | 940 | bdrv_oflags = BDRV_O_RDWR; |
aliguori | f7b4a94 | 2009-01-07 17:40:15 +0000 | [diff] [blame] | 941 | /* Parse commandline parameters */ |
| 942 | for(;;) { |
| 943 | c = getopt(argc, argv, "la:c:d:h"); |
| 944 | if (c == -1) |
| 945 | break; |
| 946 | switch(c) { |
| 947 | case 'h': |
| 948 | help(); |
Stuart Brady | 153859b | 2009-06-07 00:42:17 +0100 | [diff] [blame] | 949 | return 0; |
aliguori | f7b4a94 | 2009-01-07 17:40:15 +0000 | [diff] [blame] | 950 | case 'l': |
| 951 | if (action) { |
| 952 | help(); |
Stuart Brady | 153859b | 2009-06-07 00:42:17 +0100 | [diff] [blame] | 953 | return 0; |
aliguori | f7b4a94 | 2009-01-07 17:40:15 +0000 | [diff] [blame] | 954 | } |
| 955 | action = SNAPSHOT_LIST; |
Naphtali Sprei | f5edb01 | 2010-01-17 16:48:13 +0200 | [diff] [blame] | 956 | bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */ |
aliguori | f7b4a94 | 2009-01-07 17:40:15 +0000 | [diff] [blame] | 957 | break; |
| 958 | case 'a': |
| 959 | if (action) { |
| 960 | help(); |
Stuart Brady | 153859b | 2009-06-07 00:42:17 +0100 | [diff] [blame] | 961 | return 0; |
aliguori | f7b4a94 | 2009-01-07 17:40:15 +0000 | [diff] [blame] | 962 | } |
| 963 | action = SNAPSHOT_APPLY; |
| 964 | snapshot_name = optarg; |
| 965 | break; |
| 966 | case 'c': |
| 967 | if (action) { |
| 968 | help(); |
Stuart Brady | 153859b | 2009-06-07 00:42:17 +0100 | [diff] [blame] | 969 | return 0; |
aliguori | f7b4a94 | 2009-01-07 17:40:15 +0000 | [diff] [blame] | 970 | } |
| 971 | action = SNAPSHOT_CREATE; |
| 972 | snapshot_name = optarg; |
| 973 | break; |
| 974 | case 'd': |
| 975 | if (action) { |
| 976 | help(); |
Stuart Brady | 153859b | 2009-06-07 00:42:17 +0100 | [diff] [blame] | 977 | return 0; |
aliguori | f7b4a94 | 2009-01-07 17:40:15 +0000 | [diff] [blame] | 978 | } |
| 979 | action = SNAPSHOT_DELETE; |
| 980 | snapshot_name = optarg; |
| 981 | break; |
| 982 | } |
| 983 | } |
| 984 | |
| 985 | if (optind >= argc) |
| 986 | help(); |
| 987 | filename = argv[optind++]; |
| 988 | |
| 989 | /* Open the image */ |
Stefan Hajnoczi | f163d07 | 2010-04-13 10:29:34 +0100 | [diff] [blame] | 990 | bs = bdrv_new_open(filename, NULL, bdrv_oflags); |
aliguori | f7b4a94 | 2009-01-07 17:40:15 +0000 | [diff] [blame] | 991 | |
| 992 | /* Perform the requested action */ |
| 993 | switch(action) { |
| 994 | case SNAPSHOT_LIST: |
| 995 | dump_snapshots(bs); |
| 996 | break; |
| 997 | |
| 998 | case SNAPSHOT_CREATE: |
| 999 | memset(&sn, 0, sizeof(sn)); |
| 1000 | pstrcpy(sn.name, sizeof(sn.name), snapshot_name); |
| 1001 | |
| 1002 | qemu_gettimeofday(&tv); |
| 1003 | sn.date_sec = tv.tv_sec; |
| 1004 | sn.date_nsec = tv.tv_usec * 1000; |
| 1005 | |
| 1006 | ret = bdrv_snapshot_create(bs, &sn); |
| 1007 | if (ret) |
| 1008 | error("Could not create snapshot '%s': %d (%s)", |
| 1009 | snapshot_name, ret, strerror(-ret)); |
| 1010 | break; |
| 1011 | |
| 1012 | case SNAPSHOT_APPLY: |
| 1013 | ret = bdrv_snapshot_goto(bs, snapshot_name); |
| 1014 | if (ret) |
| 1015 | error("Could not apply snapshot '%s': %d (%s)", |
| 1016 | snapshot_name, ret, strerror(-ret)); |
| 1017 | break; |
| 1018 | |
| 1019 | case SNAPSHOT_DELETE: |
| 1020 | ret = bdrv_snapshot_delete(bs, snapshot_name); |
| 1021 | if (ret) |
| 1022 | error("Could not delete snapshot '%s': %d (%s)", |
| 1023 | snapshot_name, ret, strerror(-ret)); |
| 1024 | break; |
| 1025 | } |
| 1026 | |
| 1027 | /* Cleanup */ |
| 1028 | bdrv_delete(bs); |
Stuart Brady | 153859b | 2009-06-07 00:42:17 +0100 | [diff] [blame] | 1029 | |
| 1030 | return 0; |
aliguori | f7b4a94 | 2009-01-07 17:40:15 +0000 | [diff] [blame] | 1031 | } |
| 1032 | |
Kevin Wolf | 3e85c6f | 2010-01-12 12:55:18 +0100 | [diff] [blame] | 1033 | static int img_rebase(int argc, char **argv) |
| 1034 | { |
| 1035 | BlockDriverState *bs, *bs_old_backing, *bs_new_backing; |
Stefan Hajnoczi | f163d07 | 2010-04-13 10:29:34 +0100 | [diff] [blame] | 1036 | BlockDriver *old_backing_drv, *new_backing_drv; |
Kevin Wolf | 3e85c6f | 2010-01-12 12:55:18 +0100 | [diff] [blame] | 1037 | char *filename; |
Kevin Wolf | e53dbee | 2010-03-02 12:14:31 +0100 | [diff] [blame] | 1038 | const char *fmt, *out_basefmt, *out_baseimg; |
Kevin Wolf | 3e85c6f | 2010-01-12 12:55:18 +0100 | [diff] [blame] | 1039 | int c, flags, ret; |
| 1040 | int unsafe = 0; |
| 1041 | |
| 1042 | /* Parse commandline parameters */ |
Kevin Wolf | e53dbee | 2010-03-02 12:14:31 +0100 | [diff] [blame] | 1043 | fmt = NULL; |
Kevin Wolf | 3e85c6f | 2010-01-12 12:55:18 +0100 | [diff] [blame] | 1044 | out_baseimg = NULL; |
| 1045 | out_basefmt = NULL; |
| 1046 | |
| 1047 | for(;;) { |
Kevin Wolf | e53dbee | 2010-03-02 12:14:31 +0100 | [diff] [blame] | 1048 | c = getopt(argc, argv, "uhf:F:b:"); |
Kevin Wolf | 3e85c6f | 2010-01-12 12:55:18 +0100 | [diff] [blame] | 1049 | if (c == -1) |
| 1050 | break; |
| 1051 | switch(c) { |
| 1052 | case 'h': |
| 1053 | help(); |
| 1054 | return 0; |
Kevin Wolf | e53dbee | 2010-03-02 12:14:31 +0100 | [diff] [blame] | 1055 | case 'f': |
| 1056 | fmt = optarg; |
| 1057 | break; |
Kevin Wolf | 3e85c6f | 2010-01-12 12:55:18 +0100 | [diff] [blame] | 1058 | case 'F': |
| 1059 | out_basefmt = optarg; |
| 1060 | break; |
| 1061 | case 'b': |
| 1062 | out_baseimg = optarg; |
| 1063 | break; |
| 1064 | case 'u': |
| 1065 | unsafe = 1; |
| 1066 | break; |
| 1067 | } |
| 1068 | } |
| 1069 | |
| 1070 | if ((optind >= argc) || !out_baseimg) |
| 1071 | help(); |
| 1072 | filename = argv[optind++]; |
| 1073 | |
| 1074 | /* |
| 1075 | * Open the images. |
| 1076 | * |
| 1077 | * Ignore the old backing file for unsafe rebase in case we want to correct |
| 1078 | * the reference to a renamed or moved backing file. |
| 1079 | */ |
Stefan Hajnoczi | adfe078 | 2010-04-13 10:29:35 +0100 | [diff] [blame] | 1080 | flags = BDRV_O_FLAGS | BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0); |
Stefan Hajnoczi | f163d07 | 2010-04-13 10:29:34 +0100 | [diff] [blame] | 1081 | bs = bdrv_new_open(filename, fmt, flags); |
Kevin Wolf | 3e85c6f | 2010-01-12 12:55:18 +0100 | [diff] [blame] | 1082 | |
| 1083 | /* Find the right drivers for the backing files */ |
| 1084 | old_backing_drv = NULL; |
| 1085 | new_backing_drv = NULL; |
| 1086 | |
| 1087 | if (!unsafe && bs->backing_format[0] != '\0') { |
| 1088 | old_backing_drv = bdrv_find_format(bs->backing_format); |
| 1089 | if (old_backing_drv == NULL) { |
| 1090 | error("Invalid format name: '%s'", bs->backing_format); |
| 1091 | } |
| 1092 | } |
| 1093 | |
| 1094 | if (out_basefmt != NULL) { |
| 1095 | new_backing_drv = bdrv_find_format(out_basefmt); |
| 1096 | if (new_backing_drv == NULL) { |
| 1097 | error("Invalid format name: '%s'", out_basefmt); |
| 1098 | } |
| 1099 | } |
| 1100 | |
| 1101 | /* For safe rebasing we need to compare old and new backing file */ |
| 1102 | if (unsafe) { |
| 1103 | /* Make the compiler happy */ |
| 1104 | bs_old_backing = NULL; |
| 1105 | bs_new_backing = NULL; |
| 1106 | } else { |
| 1107 | char backing_name[1024]; |
| 1108 | |
| 1109 | bs_old_backing = bdrv_new("old_backing"); |
| 1110 | bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); |
Stefan Hajnoczi | adfe078 | 2010-04-13 10:29:35 +0100 | [diff] [blame] | 1111 | if (bdrv_open(bs_old_backing, backing_name, BDRV_O_FLAGS, |
Kevin Wolf | 3e85c6f | 2010-01-12 12:55:18 +0100 | [diff] [blame] | 1112 | old_backing_drv)) |
| 1113 | { |
| 1114 | error("Could not open old backing file '%s'", backing_name); |
| 1115 | return -1; |
| 1116 | } |
| 1117 | |
| 1118 | bs_new_backing = bdrv_new("new_backing"); |
Stefan Hajnoczi | adfe078 | 2010-04-13 10:29:35 +0100 | [diff] [blame] | 1119 | if (bdrv_open(bs_new_backing, out_baseimg, BDRV_O_FLAGS | BDRV_O_RDWR, |
Kevin Wolf | 3e85c6f | 2010-01-12 12:55:18 +0100 | [diff] [blame] | 1120 | new_backing_drv)) |
| 1121 | { |
Kevin Wolf | 584771e | 2010-02-17 12:33:17 +0100 | [diff] [blame] | 1122 | error("Could not open new backing file '%s'", out_baseimg); |
Kevin Wolf | 3e85c6f | 2010-01-12 12:55:18 +0100 | [diff] [blame] | 1123 | return -1; |
| 1124 | } |
| 1125 | } |
| 1126 | |
| 1127 | /* |
| 1128 | * Check each unallocated cluster in the COW file. If it is unallocated, |
| 1129 | * accesses go to the backing file. We must therefore compare this cluster |
| 1130 | * in the old and new backing file, and if they differ we need to copy it |
| 1131 | * from the old backing file into the COW file. |
| 1132 | * |
| 1133 | * If qemu-img crashes during this step, no harm is done. The content of |
| 1134 | * the image is the same as the original one at any time. |
| 1135 | */ |
| 1136 | if (!unsafe) { |
| 1137 | uint64_t num_sectors; |
| 1138 | uint64_t sector; |
Kevin Wolf | cc60e32 | 2010-04-29 14:47:48 +0200 | [diff] [blame^] | 1139 | int n; |
TeLeMan | d6771bf | 2010-02-08 16:20:00 +0800 | [diff] [blame] | 1140 | uint8_t * buf_old; |
| 1141 | uint8_t * buf_new; |
| 1142 | |
| 1143 | buf_old = qemu_malloc(IO_BUF_SIZE); |
| 1144 | buf_new = qemu_malloc(IO_BUF_SIZE); |
Kevin Wolf | 3e85c6f | 2010-01-12 12:55:18 +0100 | [diff] [blame] | 1145 | |
| 1146 | bdrv_get_geometry(bs, &num_sectors); |
| 1147 | |
| 1148 | for (sector = 0; sector < num_sectors; sector += n) { |
| 1149 | |
| 1150 | /* How many sectors can we handle with the next read? */ |
| 1151 | if (sector + (IO_BUF_SIZE / 512) <= num_sectors) { |
| 1152 | n = (IO_BUF_SIZE / 512); |
| 1153 | } else { |
| 1154 | n = num_sectors - sector; |
| 1155 | } |
| 1156 | |
| 1157 | /* If the cluster is allocated, we don't need to take action */ |
Kevin Wolf | cc60e32 | 2010-04-29 14:47:48 +0200 | [diff] [blame^] | 1158 | ret = bdrv_is_allocated(bs, sector, n, &n); |
| 1159 | if (ret) { |
Kevin Wolf | 3e85c6f | 2010-01-12 12:55:18 +0100 | [diff] [blame] | 1160 | continue; |
| 1161 | } |
| 1162 | |
| 1163 | /* Read old and new backing file */ |
| 1164 | if (bdrv_read(bs_old_backing, sector, buf_old, n) < 0) { |
| 1165 | error("error while reading from old backing file"); |
| 1166 | } |
| 1167 | if (bdrv_read(bs_new_backing, sector, buf_new, n) < 0) { |
| 1168 | error("error while reading from new backing file"); |
| 1169 | } |
| 1170 | |
| 1171 | /* If they differ, we need to write to the COW file */ |
| 1172 | uint64_t written = 0; |
| 1173 | |
| 1174 | while (written < n) { |
| 1175 | int pnum; |
| 1176 | |
| 1177 | if (compare_sectors(buf_old + written * 512, |
Kevin Wolf | 60b1bd4 | 2010-02-17 12:32:59 +0100 | [diff] [blame] | 1178 | buf_new + written * 512, n - written, &pnum)) |
Kevin Wolf | 3e85c6f | 2010-01-12 12:55:18 +0100 | [diff] [blame] | 1179 | { |
| 1180 | ret = bdrv_write(bs, sector + written, |
| 1181 | buf_old + written * 512, pnum); |
| 1182 | if (ret < 0) { |
| 1183 | error("Error while writing to COW image: %s", |
| 1184 | strerror(-ret)); |
| 1185 | } |
| 1186 | } |
| 1187 | |
| 1188 | written += pnum; |
| 1189 | } |
| 1190 | } |
TeLeMan | d6771bf | 2010-02-08 16:20:00 +0800 | [diff] [blame] | 1191 | |
| 1192 | qemu_free(buf_old); |
| 1193 | qemu_free(buf_new); |
Kevin Wolf | 3e85c6f | 2010-01-12 12:55:18 +0100 | [diff] [blame] | 1194 | } |
| 1195 | |
| 1196 | /* |
| 1197 | * Change the backing file. All clusters that are different from the old |
| 1198 | * backing file are overwritten in the COW file now, so the visible content |
| 1199 | * doesn't change when we switch the backing file. |
| 1200 | */ |
| 1201 | ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt); |
| 1202 | if (ret == -ENOSPC) { |
| 1203 | error("Could not change the backing file to '%s': No space left in " |
| 1204 | "the file header", out_baseimg); |
| 1205 | } else if (ret < 0) { |
| 1206 | error("Could not change the backing file to '%s': %s", |
| 1207 | out_baseimg, strerror(-ret)); |
| 1208 | } |
| 1209 | |
| 1210 | /* |
| 1211 | * TODO At this point it is possible to check if any clusters that are |
| 1212 | * allocated in the COW file are the same in the backing file. If so, they |
| 1213 | * could be dropped from the COW file. Don't do this before switching the |
| 1214 | * backing file, in case of a crash this would lead to corruption. |
| 1215 | */ |
| 1216 | |
| 1217 | /* Cleanup */ |
| 1218 | if (!unsafe) { |
| 1219 | bdrv_delete(bs_old_backing); |
| 1220 | bdrv_delete(bs_new_backing); |
| 1221 | } |
| 1222 | |
| 1223 | bdrv_delete(bs); |
| 1224 | |
| 1225 | return 0; |
| 1226 | } |
| 1227 | |
Stefan Hajnoczi | ae6b0ed | 2010-04-24 09:12:12 +0100 | [diff] [blame] | 1228 | static int img_resize(int argc, char **argv) |
| 1229 | { |
| 1230 | int c, ret, relative; |
| 1231 | const char *filename, *fmt, *size; |
| 1232 | int64_t n, total_size; |
| 1233 | BlockDriverState *bs; |
| 1234 | QEMUOptionParameter *param; |
| 1235 | QEMUOptionParameter resize_options[] = { |
| 1236 | { |
| 1237 | .name = BLOCK_OPT_SIZE, |
| 1238 | .type = OPT_SIZE, |
| 1239 | .help = "Virtual disk size" |
| 1240 | }, |
| 1241 | { NULL } |
| 1242 | }; |
| 1243 | |
| 1244 | fmt = NULL; |
| 1245 | for(;;) { |
| 1246 | c = getopt(argc, argv, "f:h"); |
| 1247 | if (c == -1) { |
| 1248 | break; |
| 1249 | } |
| 1250 | switch(c) { |
| 1251 | case 'h': |
| 1252 | help(); |
| 1253 | break; |
| 1254 | case 'f': |
| 1255 | fmt = optarg; |
| 1256 | break; |
| 1257 | } |
| 1258 | } |
| 1259 | if (optind + 1 >= argc) { |
| 1260 | help(); |
| 1261 | } |
| 1262 | filename = argv[optind++]; |
| 1263 | size = argv[optind++]; |
| 1264 | |
| 1265 | /* Choose grow, shrink, or absolute resize mode */ |
| 1266 | switch (size[0]) { |
| 1267 | case '+': |
| 1268 | relative = 1; |
| 1269 | size++; |
| 1270 | break; |
| 1271 | case '-': |
| 1272 | relative = -1; |
| 1273 | size++; |
| 1274 | break; |
| 1275 | default: |
| 1276 | relative = 0; |
| 1277 | break; |
| 1278 | } |
| 1279 | |
| 1280 | /* Parse size */ |
| 1281 | param = parse_option_parameters("", resize_options, NULL); |
| 1282 | if (set_option_parameter(param, BLOCK_OPT_SIZE, size)) { |
| 1283 | /* Error message already printed when size parsing fails */ |
| 1284 | exit(1); |
| 1285 | } |
| 1286 | n = get_option_parameter(param, BLOCK_OPT_SIZE)->value.n; |
| 1287 | free_option_parameters(param); |
| 1288 | |
| 1289 | bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR); |
| 1290 | |
| 1291 | if (relative) { |
| 1292 | total_size = bdrv_getlength(bs) + n * relative; |
| 1293 | } else { |
| 1294 | total_size = n; |
| 1295 | } |
| 1296 | if (total_size <= 0) { |
| 1297 | error("New image size must be positive"); |
| 1298 | } |
| 1299 | |
| 1300 | ret = bdrv_truncate(bs, total_size); |
| 1301 | switch (ret) { |
| 1302 | case 0: |
| 1303 | printf("Image resized.\n"); |
| 1304 | break; |
| 1305 | case -ENOTSUP: |
| 1306 | error("This image format does not support resize"); |
| 1307 | break; |
| 1308 | case -EACCES: |
| 1309 | error("Image is read-only"); |
| 1310 | break; |
| 1311 | default: |
| 1312 | error("Error resizing image (%d)", -ret); |
| 1313 | break; |
| 1314 | } |
| 1315 | |
| 1316 | bdrv_delete(bs); |
| 1317 | return 0; |
| 1318 | } |
| 1319 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 1320 | static const img_cmd_t img_cmds[] = { |
Stuart Brady | 153859b | 2009-06-07 00:42:17 +0100 | [diff] [blame] | 1321 | #define DEF(option, callback, arg_string) \ |
| 1322 | { option, callback }, |
| 1323 | #include "qemu-img-cmds.h" |
| 1324 | #undef DEF |
| 1325 | #undef GEN_DOCS |
| 1326 | { NULL, NULL, }, |
| 1327 | }; |
| 1328 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1329 | int main(int argc, char **argv) |
| 1330 | { |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 1331 | const img_cmd_t *cmd; |
Stuart Brady | 153859b | 2009-06-07 00:42:17 +0100 | [diff] [blame] | 1332 | const char *cmdname; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1333 | |
| 1334 | bdrv_init(); |
| 1335 | if (argc < 2) |
| 1336 | help(); |
Stuart Brady | 153859b | 2009-06-07 00:42:17 +0100 | [diff] [blame] | 1337 | cmdname = argv[1]; |
aurel32 | 8f9b157 | 2009-02-09 18:14:31 +0000 | [diff] [blame] | 1338 | argc--; argv++; |
Stuart Brady | 153859b | 2009-06-07 00:42:17 +0100 | [diff] [blame] | 1339 | |
| 1340 | /* find the command */ |
| 1341 | for(cmd = img_cmds; cmd->name != NULL; cmd++) { |
| 1342 | if (!strcmp(cmdname, cmd->name)) { |
| 1343 | return cmd->handler(argc, argv); |
| 1344 | } |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1345 | } |
Stuart Brady | 153859b | 2009-06-07 00:42:17 +0100 | [diff] [blame] | 1346 | |
| 1347 | /* not found */ |
| 1348 | help(); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1349 | return 0; |
| 1350 | } |