blob: 25b1369d7081d23465ce27df0b3f3f764de6fde3 [file] [log] [blame]
bellardea2384d2004-08-01 21:59:26 +00001/*
bellardfb43f4d2006-08-07 21:34:46 +00002 * QEMU disk image utility
ths5fafdf22007-09-16 21:08:06 +00003 *
bellard68d0f702008-01-06 17:21:48 +00004 * Copyright (c) 2003-2008 Fabrice Bellard
ths5fafdf22007-09-16 21:08:06 +00005 *
bellardea2384d2004-08-01 21:59:26 +00006 * 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 */
Benoît Canetc054b3f2012-09-05 13:09:02 +020024#include "qapi-visit.h"
25#include "qapi/qmp-output-visitor.h"
Paolo Bonzini7b1b5d12012-12-17 18:19:43 +010026#include "qapi/qmp/qjson.h"
pbrookfaf07962007-11-11 02:51:17 +000027#include "qemu-common.h"
Paolo Bonzini1de7afc2012-12-17 18:20:00 +010028#include "qemu/option.h"
29#include "qemu/error-report.h"
30#include "qemu/osdep.h"
Paolo Bonzini9c17d612012-12-17 18:20:04 +010031#include "sysemu/sysemu.h"
Markus Armbruster26f54e92014-10-07 13:59:04 +020032#include "sysemu/block-backend.h"
Paolo Bonzini737e1502012-12-17 18:19:44 +010033#include "block/block_int.h"
Max Reitzd4a32382014-10-24 15:57:37 +020034#include "block/blockjob.h"
Wenchao Xiaf364ec62013-05-25 11:09:44 +080035#include "block/qapi.h"
Benoît Canetc054b3f2012-09-05 13:09:02 +020036#include <getopt.h>
bellarde8445332006-06-14 15:32:10 +000037
Don Slutz61979a62015-01-09 10:17:35 -050038#define QEMU_IMG_VERSION "qemu-img version " QEMU_VERSION QEMU_PKGVERSION \
Jeff Cody5f6979c2014-04-28 14:37:18 -040039 ", Copyright (c) 2004-2008 Fabrice Bellard\n"
40
Anthony Liguoric227f092009-10-01 16:12:16 -050041typedef struct img_cmd_t {
Stuart Brady153859b2009-06-07 00:42:17 +010042 const char *name;
43 int (*handler)(int argc, char **argv);
Anthony Liguoric227f092009-10-01 16:12:16 -050044} img_cmd_t;
Stuart Brady153859b2009-06-07 00:42:17 +010045
Federico Simoncelli8599ea42013-01-28 06:59:47 -050046enum {
47 OPTION_OUTPUT = 256,
48 OPTION_BACKING_CHAIN = 257,
49};
50
51typedef enum OutputFormat {
52 OFORMAT_JSON,
53 OFORMAT_HUMAN,
54} OutputFormat;
55
aurel32137519c2008-11-30 19:12:49 +000056/* Default to cache=writeback as data integrity is not important for qemu-tcg. */
Stefan Hajnocziadfe0782010-04-13 10:29:35 +010057#define BDRV_O_FLAGS BDRV_O_CACHE_WB
Federico Simoncelli661a0f72011-06-20 12:48:19 -040058#define BDRV_DEFAULT_CACHE "writeback"
aurel32137519c2008-11-30 19:12:49 +000059
Stefan Hajnoczi00c6d402014-08-27 12:08:56 +010060static void format_print(void *opaque, const char *name)
bellardea2384d2004-08-01 21:59:26 +000061{
Stefan Hajnoczi00c6d402014-08-27 12:08:56 +010062 printf(" %s", name);
bellardea2384d2004-08-01 21:59:26 +000063}
64
Fam Zhengac1307a2014-04-22 13:36:11 +080065static void QEMU_NORETURN GCC_FMT_ATTR(1, 2) error_exit(const char *fmt, ...)
66{
67 va_list ap;
68
69 error_printf("qemu-img: ");
70
71 va_start(ap, fmt);
72 error_vprintf(fmt, ap);
73 va_end(ap);
74
75 error_printf("\nTry 'qemu-img --help' for more information\n");
76 exit(EXIT_FAILURE);
77}
78
blueswir1d2c639d2009-01-24 18:19:25 +000079/* Please keep in synch with qemu-img.texi */
Fam Zhengac1307a2014-04-22 13:36:11 +080080static void QEMU_NORETURN help(void)
bellardea2384d2004-08-01 21:59:26 +000081{
Paolo Bonzinie00291c2010-02-04 16:49:56 +010082 const char *help_msg =
Jeff Cody5f6979c2014-04-28 14:37:18 -040083 QEMU_IMG_VERSION
malc3f020d72010-02-08 12:04:56 +030084 "usage: qemu-img command [command options]\n"
85 "QEMU disk image utility\n"
86 "\n"
87 "Command syntax:\n"
Stuart Brady153859b2009-06-07 00:42:17 +010088#define DEF(option, callback, arg_string) \
89 " " arg_string "\n"
90#include "qemu-img-cmds.h"
91#undef DEF
92#undef GEN_DOCS
malc3f020d72010-02-08 12:04:56 +030093 "\n"
94 "Command parameters:\n"
95 " 'filename' is a disk image filename\n"
96 " 'fmt' is the disk image format. It is guessed automatically in most cases\n"
Federico Simoncelli661a0f72011-06-20 12:48:19 -040097 " 'cache' is the cache mode used to write the output disk image, the valid\n"
Liu Yuan80ccf932012-04-20 17:10:56 +080098 " options are: 'none', 'writeback' (default, except for convert), 'writethrough',\n"
99 " 'directsync' and 'unsafe' (default for convert)\n"
Stefan Hajnoczibb87fdf2014-09-02 11:01:02 +0100100 " 'src_cache' is the cache mode used to read input disk images, the valid\n"
101 " options are the same as for the 'cache' option\n"
malc3f020d72010-02-08 12:04:56 +0300102 " 'size' is the disk image size in bytes. Optional suffixes\n"
Kevin Wolf5e009842013-06-05 14:19:27 +0200103 " 'k' or 'K' (kilobyte, 1024), 'M' (megabyte, 1024k), 'G' (gigabyte, 1024M),\n"
104 " 'T' (terabyte, 1024G), 'P' (petabyte, 1024T) and 'E' (exabyte, 1024P) are\n"
105 " supported. 'b' is ignored.\n"
malc3f020d72010-02-08 12:04:56 +0300106 " 'output_filename' is the destination disk image filename\n"
107 " 'output_fmt' is the destination format\n"
108 " 'options' is a comma separated list of format specific options in a\n"
109 " name=value format. Use -o ? for an overview of the options supported by the\n"
110 " used format\n"
Wenchao Xiaef806542013-12-04 17:10:57 +0800111 " 'snapshot_param' is param used for internal snapshot, format\n"
112 " is 'snapshot.id=[ID],snapshot.name=[NAME]', or\n"
113 " '[ID_OR_NAME]'\n"
114 " 'snapshot_id_or_name' is deprecated, use 'snapshot_param'\n"
115 " instead\n"
malc3f020d72010-02-08 12:04:56 +0300116 " '-c' indicates that target image must be compressed (qcow format only)\n"
117 " '-u' enables unsafe rebasing. It is assumed that old and new backing file\n"
118 " match exactly. The image doesn't need a working backing file before\n"
119 " rebasing in this case (useful for renaming the backing file)\n"
120 " '-h' with or without a command shows this help and lists the supported formats\n"
Jes Sorensen6b837bc2011-03-30 14:16:25 +0200121 " '-p' show progress of command (only certain commands)\n"
Miroslav Rezaninaf382d432013-02-13 09:09:40 +0100122 " '-q' use Quiet mode - do not print any output (except errors)\n"
Peter Lieven11b66992013-10-24 12:07:05 +0200123 " '-S' indicates the consecutive number of bytes (defaults to 4k) that must\n"
124 " contain only zeros for qemu-img to create a sparse image during\n"
125 " conversion. If the number of bytes is 0, the source will not be scanned for\n"
126 " unallocated or zero sectors, and the destination image will always be\n"
127 " fully allocated\n"
Benoît Canetc054b3f2012-09-05 13:09:02 +0200128 " '--output' takes the format in which the output must be done (human or json)\n"
Alexandre Derumierb2e10492013-09-02 19:07:24 +0100129 " '-n' skips the target volume creation (useful if the volume is created\n"
130 " prior to running qemu-img)\n"
malc3f020d72010-02-08 12:04:56 +0300131 "\n"
Kevin Wolf4534ff52012-05-11 16:07:02 +0200132 "Parameters to check subcommand:\n"
133 " '-r' tries to repair any inconsistencies that are found during the check.\n"
134 " '-r leaks' repairs only cluster leaks, whereas '-r all' fixes all\n"
135 " kinds of errors, with a higher risk of choosing the wrong fix or\n"
Stefan Weil0546b8c2012-08-10 22:03:25 +0200136 " hiding corruption that has already occurred.\n"
Kevin Wolf4534ff52012-05-11 16:07:02 +0200137 "\n"
malc3f020d72010-02-08 12:04:56 +0300138 "Parameters to snapshot subcommand:\n"
139 " 'snapshot' is the name of the snapshot to create, apply or delete\n"
140 " '-a' applies a snapshot (revert disk to saved state)\n"
141 " '-c' creates a snapshot\n"
142 " '-d' deletes a snapshot\n"
Miroslav Rezaninad14ed182013-02-13 09:09:41 +0100143 " '-l' lists all snapshots in the given image\n"
144 "\n"
145 "Parameters to compare subcommand:\n"
146 " '-f' first image format\n"
147 " '-F' second image format\n"
148 " '-s' run in Strict mode - fail on different image size or sector allocation\n";
Paolo Bonzinie00291c2010-02-04 16:49:56 +0100149
150 printf("%s\nSupported formats:", help_msg);
Stefan Hajnoczi00c6d402014-08-27 12:08:56 +0100151 bdrv_iterate_format(format_print, NULL);
bellardea2384d2004-08-01 21:59:26 +0000152 printf("\n");
Fam Zhengac1307a2014-04-22 13:36:11 +0800153 exit(EXIT_SUCCESS);
bellardea2384d2004-08-01 21:59:26 +0000154}
155
Stefan Weil7c30f652013-06-16 17:01:05 +0200156static int GCC_FMT_ATTR(2, 3) qprintf(bool quiet, const char *fmt, ...)
Miroslav Rezaninaf382d432013-02-13 09:09:40 +0100157{
158 int ret = 0;
159 if (!quiet) {
160 va_list args;
161 va_start(args, fmt);
162 ret = vprintf(fmt, args);
163 va_end(args);
164 }
165 return ret;
166}
167
bellardea2384d2004-08-01 21:59:26 +0000168#if defined(WIN32)
169/* XXX: put correct support for win32 */
170static int read_password(char *buf, int buf_size)
171{
172 int c, i;
Chen Gangfdcf6e62014-07-06 16:43:33 +0800173
bellardea2384d2004-08-01 21:59:26 +0000174 printf("Password: ");
175 fflush(stdout);
176 i = 0;
177 for(;;) {
178 c = getchar();
Chen Gangfdcf6e62014-07-06 16:43:33 +0800179 if (c < 0) {
180 buf[i] = '\0';
181 return -1;
182 } else if (c == '\n') {
bellardea2384d2004-08-01 21:59:26 +0000183 break;
Chen Gangfdcf6e62014-07-06 16:43:33 +0800184 } else if (i < (buf_size - 1)) {
bellardea2384d2004-08-01 21:59:26 +0000185 buf[i++] = c;
Chen Gangfdcf6e62014-07-06 16:43:33 +0800186 }
bellardea2384d2004-08-01 21:59:26 +0000187 }
188 buf[i] = '\0';
189 return 0;
190}
191
192#else
193
194#include <termios.h>
195
196static struct termios oldtty;
197
198static void term_exit(void)
199{
200 tcsetattr (0, TCSANOW, &oldtty);
201}
202
203static void term_init(void)
204{
205 struct termios tty;
206
207 tcgetattr (0, &tty);
208 oldtty = tty;
209
210 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
211 |INLCR|IGNCR|ICRNL|IXON);
212 tty.c_oflag |= OPOST;
213 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
214 tty.c_cflag &= ~(CSIZE|PARENB);
215 tty.c_cflag |= CS8;
216 tty.c_cc[VMIN] = 1;
217 tty.c_cc[VTIME] = 0;
ths3b46e622007-09-17 08:09:54 +0000218
bellardea2384d2004-08-01 21:59:26 +0000219 tcsetattr (0, TCSANOW, &tty);
220
221 atexit(term_exit);
222}
223
pbrook3f379ab2007-11-11 03:33:13 +0000224static int read_password(char *buf, int buf_size)
bellardea2384d2004-08-01 21:59:26 +0000225{
226 uint8_t ch;
227 int i, ret;
228
229 printf("password: ");
230 fflush(stdout);
231 term_init();
232 i = 0;
233 for(;;) {
234 ret = read(0, &ch, 1);
235 if (ret == -1) {
236 if (errno == EAGAIN || errno == EINTR) {
237 continue;
238 } else {
bellardea2384d2004-08-01 21:59:26 +0000239 break;
240 }
241 } else if (ret == 0) {
242 ret = -1;
243 break;
244 } else {
245 if (ch == '\r') {
246 ret = 0;
247 break;
248 }
249 if (i < (buf_size - 1))
250 buf[i++] = ch;
251 }
252 }
253 term_exit();
254 buf[i] = '\0';
255 printf("\n");
256 return ret;
257}
258#endif
259
Jes Sorensen4ac8aac2010-12-06 15:25:38 +0100260static int print_block_option_help(const char *filename, const char *fmt)
261{
262 BlockDriver *drv, *proto_drv;
Chunyan Liu83d05212014-06-05 17:20:51 +0800263 QemuOptsList *create_opts = NULL;
Jes Sorensen4ac8aac2010-12-06 15:25:38 +0100264
265 /* Find driver and parse its options */
266 drv = bdrv_find_format(fmt);
267 if (!drv) {
Jes Sorensen15654a62010-12-16 14:31:53 +0100268 error_report("Unknown file format '%s'", fmt);
Jes Sorensen4ac8aac2010-12-06 15:25:38 +0100269 return 1;
270 }
271
Chunyan Liuc282e1f2014-06-05 17:21:11 +0800272 create_opts = qemu_opts_append(create_opts, drv->create_opts);
Kevin Wolfa283cb62014-02-21 16:24:07 +0100273 if (filename) {
274 proto_drv = bdrv_find_protocol(filename, true);
275 if (!proto_drv) {
276 error_report("Unknown protocol '%s'", filename);
Chunyan Liu83d05212014-06-05 17:20:51 +0800277 qemu_opts_free(create_opts);
Kevin Wolfa283cb62014-02-21 16:24:07 +0100278 return 1;
279 }
Chunyan Liuc282e1f2014-06-05 17:21:11 +0800280 create_opts = qemu_opts_append(create_opts, proto_drv->create_opts);
Kevin Wolfa283cb62014-02-21 16:24:07 +0100281 }
282
Chunyan Liu83d05212014-06-05 17:20:51 +0800283 qemu_opts_print_help(create_opts);
284 qemu_opts_free(create_opts);
Jes Sorensen4ac8aac2010-12-06 15:25:38 +0100285 return 0;
286}
287
Markus Armbruster7e7d56d2014-10-07 13:59:05 +0200288static BlockBackend *img_open(const char *id, const char *filename,
289 const char *fmt, int flags,
290 bool require_io, bool quiet)
bellard75c23802004-08-27 21:28:58 +0000291{
Markus Armbruster7e7d56d2014-10-07 13:59:05 +0200292 BlockBackend *blk;
bellard75c23802004-08-27 21:28:58 +0000293 BlockDriverState *bs;
294 BlockDriver *drv;
295 char password[256];
Max Reitz34b5d2c2013-09-05 14:45:29 +0200296 Error *local_err = NULL;
Kevin Wolfb9eaf9e2011-02-09 11:25:53 +0100297 int ret;
bellard75c23802004-08-27 21:28:58 +0000298
Markus Armbruster7e7d56d2014-10-07 13:59:05 +0200299 blk = blk_new_with_bs(id, &error_abort);
300 bs = blk_bs(blk);
Kevin Wolfad717132010-12-16 15:37:41 +0100301
bellard75c23802004-08-27 21:28:58 +0000302 if (fmt) {
303 drv = bdrv_find_format(fmt);
MORITA Kazutakac2abcce2010-06-21 04:26:35 +0900304 if (!drv) {
Jes Sorensen15654a62010-12-16 14:31:53 +0100305 error_report("Unknown file format '%s'", fmt);
MORITA Kazutakac2abcce2010-06-21 04:26:35 +0900306 goto fail;
307 }
bellard75c23802004-08-27 21:28:58 +0000308 } else {
309 drv = NULL;
310 }
Kevin Wolfb9eaf9e2011-02-09 11:25:53 +0100311
Max Reitzddf56362014-02-18 18:33:06 +0100312 ret = bdrv_open(&bs, filename, NULL, NULL, flags, drv, &local_err);
Kevin Wolfb9eaf9e2011-02-09 11:25:53 +0100313 if (ret < 0) {
Max Reitz34b5d2c2013-09-05 14:45:29 +0200314 error_report("Could not open '%s': %s", filename,
315 error_get_pretty(local_err));
316 error_free(local_err);
MORITA Kazutakac2abcce2010-06-21 04:26:35 +0900317 goto fail;
bellard75c23802004-08-27 21:28:58 +0000318 }
Kevin Wolfb9eaf9e2011-02-09 11:25:53 +0100319
Daniel P. Berrangef0536bb2012-09-10 12:11:31 +0100320 if (bdrv_is_encrypted(bs) && require_io) {
Miroslav Rezaninaf382d432013-02-13 09:09:40 +0100321 qprintf(quiet, "Disk image '%s' is encrypted.\n", filename);
MORITA Kazutakac2abcce2010-06-21 04:26:35 +0900322 if (read_password(password, sizeof(password)) < 0) {
Jes Sorensen15654a62010-12-16 14:31:53 +0100323 error_report("No password given");
MORITA Kazutakac2abcce2010-06-21 04:26:35 +0900324 goto fail;
325 }
326 if (bdrv_set_key(bs, password) < 0) {
Jes Sorensen15654a62010-12-16 14:31:53 +0100327 error_report("invalid password");
MORITA Kazutakac2abcce2010-06-21 04:26:35 +0900328 goto fail;
329 }
bellard75c23802004-08-27 21:28:58 +0000330 }
Markus Armbruster7e7d56d2014-10-07 13:59:05 +0200331 return blk;
MORITA Kazutakac2abcce2010-06-21 04:26:35 +0900332fail:
Markus Armbruster7e7d56d2014-10-07 13:59:05 +0200333 blk_unref(blk);
MORITA Kazutakac2abcce2010-06-21 04:26:35 +0900334 return NULL;
bellard75c23802004-08-27 21:28:58 +0000335}
336
Chunyan Liu83d05212014-06-05 17:20:51 +0800337static int add_old_style_options(const char *fmt, QemuOpts *opts,
Jes Sorenseneec77d92010-12-07 17:44:34 +0100338 const char *base_filename,
339 const char *base_fmt)
Kevin Wolfefa84d42009-05-18 16:42:12 +0200340{
Kevin Wolfefa84d42009-05-18 16:42:12 +0200341 if (base_filename) {
Chunyan Liu83d05212014-06-05 17:20:51 +0800342 if (qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, base_filename)) {
Jes Sorensen15654a62010-12-16 14:31:53 +0100343 error_report("Backing file not supported for file format '%s'",
344 fmt);
MORITA Kazutakac2abcce2010-06-21 04:26:35 +0900345 return -1;
Kevin Wolfefa84d42009-05-18 16:42:12 +0200346 }
347 }
348 if (base_fmt) {
Chunyan Liu83d05212014-06-05 17:20:51 +0800349 if (qemu_opt_set(opts, BLOCK_OPT_BACKING_FMT, base_fmt)) {
Jes Sorensen15654a62010-12-16 14:31:53 +0100350 error_report("Backing file format not supported for file "
351 "format '%s'", fmt);
MORITA Kazutakac2abcce2010-06-21 04:26:35 +0900352 return -1;
Kevin Wolfefa84d42009-05-18 16:42:12 +0200353 }
354 }
MORITA Kazutakac2abcce2010-06-21 04:26:35 +0900355 return 0;
Kevin Wolfefa84d42009-05-18 16:42:12 +0200356}
357
bellardea2384d2004-08-01 21:59:26 +0000358static int img_create(int argc, char **argv)
359{
Luiz Capitulinoa9300912012-11-30 10:52:06 -0200360 int c;
Jes Sorensen1da7cfb2010-12-09 14:17:25 +0100361 uint64_t img_size = -1;
bellardea2384d2004-08-01 21:59:26 +0000362 const char *fmt = "raw";
aliguori9230eaf2009-03-28 17:55:19 +0000363 const char *base_fmt = NULL;
bellardea2384d2004-08-01 21:59:26 +0000364 const char *filename;
365 const char *base_filename = NULL;
Kevin Wolf9ea2ea72009-05-18 16:42:11 +0200366 char *options = NULL;
Luiz Capitulino9b375252012-11-30 10:52:05 -0200367 Error *local_err = NULL;
Miroslav Rezaninaf382d432013-02-13 09:09:40 +0100368 bool quiet = false;
ths3b46e622007-09-17 08:09:54 +0000369
bellardea2384d2004-08-01 21:59:26 +0000370 for(;;) {
Miroslav Rezaninaf382d432013-02-13 09:09:40 +0100371 c = getopt(argc, argv, "F:b:f:he6o:q");
Jes Sorensenb8fb60d2010-12-06 15:25:39 +0100372 if (c == -1) {
bellardea2384d2004-08-01 21:59:26 +0000373 break;
Jes Sorensenb8fb60d2010-12-06 15:25:39 +0100374 }
bellardea2384d2004-08-01 21:59:26 +0000375 switch(c) {
Jes Sorensenef873942010-12-06 15:25:40 +0100376 case '?':
bellardea2384d2004-08-01 21:59:26 +0000377 case 'h':
378 help();
379 break;
aliguori9230eaf2009-03-28 17:55:19 +0000380 case 'F':
381 base_fmt = optarg;
382 break;
bellardea2384d2004-08-01 21:59:26 +0000383 case 'b':
384 base_filename = optarg;
385 break;
386 case 'f':
387 fmt = optarg;
388 break;
389 case 'e':
Markus Armbruster9d42e152011-06-22 14:03:55 +0200390 error_report("option -e is deprecated, please use \'-o "
Jes Sorenseneec77d92010-12-07 17:44:34 +0100391 "encryption\' instead!");
Kevin Wolf77386bf2014-02-21 16:24:04 +0100392 goto fail;
thsd8871c52007-10-24 16:11:42 +0000393 case '6':
Markus Armbruster9d42e152011-06-22 14:03:55 +0200394 error_report("option -6 is deprecated, please use \'-o "
Jes Sorenseneec77d92010-12-07 17:44:34 +0100395 "compat6\' instead!");
Kevin Wolf77386bf2014-02-21 16:24:04 +0100396 goto fail;
Kevin Wolf9ea2ea72009-05-18 16:42:11 +0200397 case 'o':
Kevin Wolf77386bf2014-02-21 16:24:04 +0100398 if (!is_valid_option_list(optarg)) {
399 error_report("Invalid option list: %s", optarg);
400 goto fail;
401 }
402 if (!options) {
403 options = g_strdup(optarg);
404 } else {
405 char *old_options = options;
406 options = g_strdup_printf("%s,%s", options, optarg);
407 g_free(old_options);
408 }
Kevin Wolf9ea2ea72009-05-18 16:42:11 +0200409 break;
Miroslav Rezaninaf382d432013-02-13 09:09:40 +0100410 case 'q':
411 quiet = true;
412 break;
bellardea2384d2004-08-01 21:59:26 +0000413 }
414 }
aliguori9230eaf2009-03-28 17:55:19 +0000415
MORITA Kazutakab50cbab2010-05-26 11:35:36 +0900416 /* Get the filename */
Kevin Wolfa283cb62014-02-21 16:24:07 +0100417 filename = (optind < argc) ? argv[optind] : NULL;
418 if (options && has_help_option(options)) {
419 g_free(options);
420 return print_block_option_help(filename, fmt);
421 }
422
Jes Sorensenb8fb60d2010-12-06 15:25:39 +0100423 if (optind >= argc) {
Fam Zhengac1307a2014-04-22 13:36:11 +0800424 error_exit("Expecting image file name");
Jes Sorensenb8fb60d2010-12-06 15:25:39 +0100425 }
Kevin Wolfa283cb62014-02-21 16:24:07 +0100426 optind++;
MORITA Kazutakab50cbab2010-05-26 11:35:36 +0900427
Jes Sorensen1da7cfb2010-12-09 14:17:25 +0100428 /* Get image size, if specified */
429 if (optind < argc) {
Jes Sorensen70b4f4b2011-01-05 11:41:02 +0100430 int64_t sval;
Markus Armbrustere36b3692011-11-22 09:46:05 +0100431 char *end;
432 sval = strtosz_suffix(argv[optind++], &end, STRTOSZ_DEFSUFFIX_B);
433 if (sval < 0 || *end) {
liguang79443392012-12-17 09:49:23 +0800434 if (sval == -ERANGE) {
435 error_report("Image size must be less than 8 EiB!");
436 } else {
437 error_report("Invalid image size specified! You may use k, M, "
Kevin Wolf5e009842013-06-05 14:19:27 +0200438 "G, T, P or E suffixes for ");
439 error_report("kilobytes, megabytes, gigabytes, terabytes, "
440 "petabytes and exabytes.");
liguang79443392012-12-17 09:49:23 +0800441 }
Kevin Wolf77386bf2014-02-21 16:24:04 +0100442 goto fail;
Jes Sorensen1da7cfb2010-12-09 14:17:25 +0100443 }
444 img_size = (uint64_t)sval;
445 }
Kevin Wolffc11eb22013-08-05 10:53:04 +0200446 if (optind != argc) {
Fam Zhengac1307a2014-04-22 13:36:11 +0800447 error_exit("Unexpected argument: %s", argv[optind]);
Kevin Wolffc11eb22013-08-05 10:53:04 +0200448 }
Jes Sorensen1da7cfb2010-12-09 14:17:25 +0100449
Luiz Capitulino9b375252012-11-30 10:52:05 -0200450 bdrv_img_create(filename, fmt, base_filename, base_fmt,
Miroslav Rezaninaf382d432013-02-13 09:09:40 +0100451 options, img_size, BDRV_O_FLAGS, &local_err, quiet);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100452 if (local_err) {
Max Reitzb70d8c22013-09-06 16:51:03 +0200453 error_report("%s: %s", filename, error_get_pretty(local_err));
Luiz Capitulino9b375252012-11-30 10:52:05 -0200454 error_free(local_err);
Kevin Wolf77386bf2014-02-21 16:24:04 +0100455 goto fail;
MORITA Kazutakac2abcce2010-06-21 04:26:35 +0900456 }
Luiz Capitulinoa9300912012-11-30 10:52:06 -0200457
Kevin Wolf77386bf2014-02-21 16:24:04 +0100458 g_free(options);
bellardea2384d2004-08-01 21:59:26 +0000459 return 0;
Kevin Wolf77386bf2014-02-21 16:24:04 +0100460
461fail:
462 g_free(options);
463 return 1;
bellardea2384d2004-08-01 21:59:26 +0000464}
465
Miroslav Rezaninaf382d432013-02-13 09:09:40 +0100466static void dump_json_image_check(ImageCheck *check, bool quiet)
Federico Simoncelli8599ea42013-01-28 06:59:47 -0500467{
Markus Armbruster4399c432014-04-25 16:50:32 +0200468 Error *local_err = NULL;
Federico Simoncelli8599ea42013-01-28 06:59:47 -0500469 QString *str;
470 QmpOutputVisitor *ov = qmp_output_visitor_new();
471 QObject *obj;
472 visit_type_ImageCheck(qmp_output_get_visitor(ov),
Markus Armbruster4399c432014-04-25 16:50:32 +0200473 &check, NULL, &local_err);
Federico Simoncelli8599ea42013-01-28 06:59:47 -0500474 obj = qmp_output_get_qobject(ov);
475 str = qobject_to_json_pretty(obj);
476 assert(str != NULL);
Miroslav Rezaninaf382d432013-02-13 09:09:40 +0100477 qprintf(quiet, "%s\n", qstring_get_str(str));
Federico Simoncelli8599ea42013-01-28 06:59:47 -0500478 qobject_decref(obj);
479 qmp_output_visitor_cleanup(ov);
480 QDECREF(str);
481}
482
Miroslav Rezaninaf382d432013-02-13 09:09:40 +0100483static void dump_human_image_check(ImageCheck *check, bool quiet)
Federico Simoncelli8599ea42013-01-28 06:59:47 -0500484{
485 if (!(check->corruptions || check->leaks || check->check_errors)) {
Miroslav Rezaninaf382d432013-02-13 09:09:40 +0100486 qprintf(quiet, "No errors were found on the image.\n");
Federico Simoncelli8599ea42013-01-28 06:59:47 -0500487 } else {
488 if (check->corruptions) {
Miroslav Rezaninaf382d432013-02-13 09:09:40 +0100489 qprintf(quiet, "\n%" PRId64 " errors were found on the image.\n"
490 "Data may be corrupted, or further writes to the image "
491 "may corrupt it.\n",
492 check->corruptions);
Federico Simoncelli8599ea42013-01-28 06:59:47 -0500493 }
494
495 if (check->leaks) {
Miroslav Rezaninaf382d432013-02-13 09:09:40 +0100496 qprintf(quiet,
497 "\n%" PRId64 " leaked clusters were found on the image.\n"
498 "This means waste of disk space, but no harm to data.\n",
499 check->leaks);
Federico Simoncelli8599ea42013-01-28 06:59:47 -0500500 }
501
502 if (check->check_errors) {
Miroslav Rezaninaf382d432013-02-13 09:09:40 +0100503 qprintf(quiet,
504 "\n%" PRId64
505 " internal errors have occurred during the check.\n",
506 check->check_errors);
Federico Simoncelli8599ea42013-01-28 06:59:47 -0500507 }
508 }
509
510 if (check->total_clusters != 0 && check->allocated_clusters != 0) {
Miroslav Rezaninaf382d432013-02-13 09:09:40 +0100511 qprintf(quiet, "%" PRId64 "/%" PRId64 " = %0.2f%% allocated, "
512 "%0.2f%% fragmented, %0.2f%% compressed clusters\n",
513 check->allocated_clusters, check->total_clusters,
514 check->allocated_clusters * 100.0 / check->total_clusters,
515 check->fragmented_clusters * 100.0 / check->allocated_clusters,
516 check->compressed_clusters * 100.0 /
517 check->allocated_clusters);
Federico Simoncelli8599ea42013-01-28 06:59:47 -0500518 }
519
520 if (check->image_end_offset) {
Miroslav Rezaninaf382d432013-02-13 09:09:40 +0100521 qprintf(quiet,
522 "Image end offset: %" PRId64 "\n", check->image_end_offset);
Federico Simoncelli8599ea42013-01-28 06:59:47 -0500523 }
524}
525
526static int collect_image_check(BlockDriverState *bs,
527 ImageCheck *check,
528 const char *filename,
529 const char *fmt,
530 int fix)
531{
532 int ret;
533 BdrvCheckResult result;
534
535 ret = bdrv_check(bs, &result, fix);
536 if (ret < 0) {
537 return ret;
538 }
539
540 check->filename = g_strdup(filename);
541 check->format = g_strdup(bdrv_get_format_name(bs));
542 check->check_errors = result.check_errors;
543 check->corruptions = result.corruptions;
544 check->has_corruptions = result.corruptions != 0;
545 check->leaks = result.leaks;
546 check->has_leaks = result.leaks != 0;
547 check->corruptions_fixed = result.corruptions_fixed;
548 check->has_corruptions_fixed = result.corruptions != 0;
549 check->leaks_fixed = result.leaks_fixed;
550 check->has_leaks_fixed = result.leaks != 0;
551 check->image_end_offset = result.image_end_offset;
552 check->has_image_end_offset = result.image_end_offset != 0;
553 check->total_clusters = result.bfi.total_clusters;
554 check->has_total_clusters = result.bfi.total_clusters != 0;
555 check->allocated_clusters = result.bfi.allocated_clusters;
556 check->has_allocated_clusters = result.bfi.allocated_clusters != 0;
557 check->fragmented_clusters = result.bfi.fragmented_clusters;
558 check->has_fragmented_clusters = result.bfi.fragmented_clusters != 0;
Stefan Hajnoczie6439d72013-02-07 17:15:04 +0100559 check->compressed_clusters = result.bfi.compressed_clusters;
560 check->has_compressed_clusters = result.bfi.compressed_clusters != 0;
Federico Simoncelli8599ea42013-01-28 06:59:47 -0500561
562 return 0;
563}
564
Kevin Wolfe076f332010-06-29 11:43:13 +0200565/*
566 * Checks an image for consistency. Exit codes:
567 *
Max Reitzd6635c42014-06-02 22:15:21 +0200568 * 0 - Check completed, image is good
569 * 1 - Check not completed because of internal errors
570 * 2 - Check completed, image is corrupted
571 * 3 - Check completed, image has leaked clusters, but is good otherwise
572 * 63 - Checks are not supported by the image format
Kevin Wolfe076f332010-06-29 11:43:13 +0200573 */
aliguori15859692009-04-21 23:11:53 +0000574static int img_check(int argc, char **argv)
575{
576 int c, ret;
Federico Simoncelli8599ea42013-01-28 06:59:47 -0500577 OutputFormat output_format = OFORMAT_HUMAN;
Max Reitz40055952014-07-22 22:58:42 +0200578 const char *filename, *fmt, *output, *cache;
Markus Armbruster26f54e92014-10-07 13:59:04 +0200579 BlockBackend *blk;
aliguori15859692009-04-21 23:11:53 +0000580 BlockDriverState *bs;
Kevin Wolf4534ff52012-05-11 16:07:02 +0200581 int fix = 0;
Stefan Hajnoczi058f8f12012-08-09 13:05:56 +0100582 int flags = BDRV_O_FLAGS | BDRV_O_CHECK;
Markus Armbruster7e7d56d2014-10-07 13:59:05 +0200583 ImageCheck *check;
Miroslav Rezaninaf382d432013-02-13 09:09:40 +0100584 bool quiet = false;
aliguori15859692009-04-21 23:11:53 +0000585
586 fmt = NULL;
Federico Simoncelli8599ea42013-01-28 06:59:47 -0500587 output = NULL;
Max Reitz40055952014-07-22 22:58:42 +0200588 cache = BDRV_DEFAULT_CACHE;
aliguori15859692009-04-21 23:11:53 +0000589 for(;;) {
Federico Simoncelli8599ea42013-01-28 06:59:47 -0500590 int option_index = 0;
591 static const struct option long_options[] = {
592 {"help", no_argument, 0, 'h'},
593 {"format", required_argument, 0, 'f'},
Prasad Joshi4fd6a982014-03-25 00:08:54 +0530594 {"repair", required_argument, 0, 'r'},
Federico Simoncelli8599ea42013-01-28 06:59:47 -0500595 {"output", required_argument, 0, OPTION_OUTPUT},
596 {0, 0, 0, 0}
597 };
Max Reitz40055952014-07-22 22:58:42 +0200598 c = getopt_long(argc, argv, "hf:r:T:q",
Federico Simoncelli8599ea42013-01-28 06:59:47 -0500599 long_options, &option_index);
Jes Sorensenb8fb60d2010-12-06 15:25:39 +0100600 if (c == -1) {
aliguori15859692009-04-21 23:11:53 +0000601 break;
Jes Sorensenb8fb60d2010-12-06 15:25:39 +0100602 }
aliguori15859692009-04-21 23:11:53 +0000603 switch(c) {
Jes Sorensenef873942010-12-06 15:25:40 +0100604 case '?':
aliguori15859692009-04-21 23:11:53 +0000605 case 'h':
606 help();
607 break;
608 case 'f':
609 fmt = optarg;
610 break;
Kevin Wolf4534ff52012-05-11 16:07:02 +0200611 case 'r':
612 flags |= BDRV_O_RDWR;
613
614 if (!strcmp(optarg, "leaks")) {
615 fix = BDRV_FIX_LEAKS;
616 } else if (!strcmp(optarg, "all")) {
617 fix = BDRV_FIX_LEAKS | BDRV_FIX_ERRORS;
618 } else {
Fam Zhengac1307a2014-04-22 13:36:11 +0800619 error_exit("Unknown option value for -r "
620 "(expecting 'leaks' or 'all'): %s", optarg);
Kevin Wolf4534ff52012-05-11 16:07:02 +0200621 }
622 break;
Federico Simoncelli8599ea42013-01-28 06:59:47 -0500623 case OPTION_OUTPUT:
624 output = optarg;
625 break;
Max Reitz40055952014-07-22 22:58:42 +0200626 case 'T':
627 cache = optarg;
628 break;
Miroslav Rezaninaf382d432013-02-13 09:09:40 +0100629 case 'q':
630 quiet = true;
631 break;
aliguori15859692009-04-21 23:11:53 +0000632 }
633 }
Kevin Wolffc11eb22013-08-05 10:53:04 +0200634 if (optind != argc - 1) {
Fam Zhengac1307a2014-04-22 13:36:11 +0800635 error_exit("Expecting one image file name");
Jes Sorensenb8fb60d2010-12-06 15:25:39 +0100636 }
aliguori15859692009-04-21 23:11:53 +0000637 filename = argv[optind++];
638
Federico Simoncelli8599ea42013-01-28 06:59:47 -0500639 if (output && !strcmp(output, "json")) {
640 output_format = OFORMAT_JSON;
641 } else if (output && !strcmp(output, "human")) {
642 output_format = OFORMAT_HUMAN;
643 } else if (output) {
644 error_report("--output must be used with human or json as argument.");
645 return 1;
646 }
647
Max Reitz40055952014-07-22 22:58:42 +0200648 ret = bdrv_parse_cache_flags(cache, &flags);
649 if (ret < 0) {
650 error_report("Invalid source cache option: %s", cache);
651 return 1;
652 }
653
Markus Armbruster7e7d56d2014-10-07 13:59:05 +0200654 blk = img_open("image", filename, fmt, flags, true, quiet);
655 if (!blk) {
656 return 1;
MORITA Kazutakac2abcce2010-06-21 04:26:35 +0900657 }
Markus Armbruster7e7d56d2014-10-07 13:59:05 +0200658 bs = blk_bs(blk);
Federico Simoncelli8599ea42013-01-28 06:59:47 -0500659
660 check = g_new0(ImageCheck, 1);
661 ret = collect_image_check(bs, check, filename, fmt, fix);
Kevin Wolfe076f332010-06-29 11:43:13 +0200662
663 if (ret == -ENOTSUP) {
Max Reitz55d492d2014-05-31 21:33:30 +0200664 error_report("This image format does not support checks");
Peter Lievenfefddf92013-10-24 08:53:34 +0200665 ret = 63;
Federico Simoncelli8599ea42013-01-28 06:59:47 -0500666 goto fail;
Kevin Wolfe076f332010-06-29 11:43:13 +0200667 }
668
Federico Simoncelli8599ea42013-01-28 06:59:47 -0500669 if (check->corruptions_fixed || check->leaks_fixed) {
670 int corruptions_fixed, leaks_fixed;
671
672 leaks_fixed = check->leaks_fixed;
673 corruptions_fixed = check->corruptions_fixed;
674
675 if (output_format == OFORMAT_HUMAN) {
Miroslav Rezaninaf382d432013-02-13 09:09:40 +0100676 qprintf(quiet,
677 "The following inconsistencies were found and repaired:\n\n"
678 " %" PRId64 " leaked clusters\n"
679 " %" PRId64 " corruptions\n\n"
680 "Double checking the fixed image now...\n",
681 check->leaks_fixed,
682 check->corruptions_fixed);
Federico Simoncelli8599ea42013-01-28 06:59:47 -0500683 }
684
685 ret = collect_image_check(bs, check, filename, fmt, 0);
686
687 check->leaks_fixed = leaks_fixed;
688 check->corruptions_fixed = corruptions_fixed;
Kevin Wolfccf34712012-05-11 18:16:54 +0200689 }
690
Max Reitz832390a2014-10-23 15:29:12 +0200691 if (!ret) {
692 switch (output_format) {
693 case OFORMAT_HUMAN:
694 dump_human_image_check(check, quiet);
695 break;
696 case OFORMAT_JSON:
697 dump_json_image_check(check, quiet);
698 break;
699 }
Federico Simoncelli8599ea42013-01-28 06:59:47 -0500700 }
701
702 if (ret || check->check_errors) {
Max Reitz832390a2014-10-23 15:29:12 +0200703 if (ret) {
704 error_report("Check failed: %s", strerror(-ret));
705 } else {
706 error_report("Check failed");
707 }
Federico Simoncelli8599ea42013-01-28 06:59:47 -0500708 ret = 1;
709 goto fail;
710 }
711
712 if (check->corruptions) {
713 ret = 2;
714 } else if (check->leaks) {
715 ret = 3;
Kevin Wolfe076f332010-06-29 11:43:13 +0200716 } else {
Federico Simoncelli8599ea42013-01-28 06:59:47 -0500717 ret = 0;
aliguori15859692009-04-21 23:11:53 +0000718 }
719
Federico Simoncelli8599ea42013-01-28 06:59:47 -0500720fail:
721 qapi_free_ImageCheck(check);
Markus Armbruster26f54e92014-10-07 13:59:04 +0200722 blk_unref(blk);
Federico Simoncelli8599ea42013-01-28 06:59:47 -0500723 return ret;
aliguori15859692009-04-21 23:11:53 +0000724}
725
Max Reitzd4a32382014-10-24 15:57:37 +0200726typedef struct CommonBlockJobCBInfo {
727 BlockDriverState *bs;
728 Error **errp;
729} CommonBlockJobCBInfo;
730
731static void common_block_job_cb(void *opaque, int ret)
732{
733 CommonBlockJobCBInfo *cbi = opaque;
734
735 if (ret < 0) {
736 error_setg_errno(cbi->errp, -ret, "Block job failed");
737 }
738
739 /* Drop this block job's reference */
740 bdrv_unref(cbi->bs);
741}
742
743static void run_block_job(BlockJob *job, Error **errp)
744{
745 AioContext *aio_context = bdrv_get_aio_context(job->bs);
746
747 do {
748 aio_poll(aio_context, true);
Max Reitz687fa1d2014-10-24 15:57:39 +0200749 qemu_progress_print((float)job->offset / job->len * 100.f, 0);
Max Reitzd4a32382014-10-24 15:57:37 +0200750 } while (!job->ready);
751
752 block_job_complete_sync(job, errp);
Max Reitz687fa1d2014-10-24 15:57:39 +0200753
754 /* A block job may finish instantaneously without publishing any progress,
755 * so just signal completion here */
756 qemu_progress_print(100.f, 0);
Max Reitzd4a32382014-10-24 15:57:37 +0200757}
758
bellardea2384d2004-08-01 21:59:26 +0000759static int img_commit(int argc, char **argv)
760{
Federico Simoncelli661a0f72011-06-20 12:48:19 -0400761 int c, ret, flags;
Max Reitz1b22bff2014-10-24 15:57:40 +0200762 const char *filename, *fmt, *cache, *base;
Markus Armbruster26f54e92014-10-07 13:59:04 +0200763 BlockBackend *blk;
Max Reitzd4a32382014-10-24 15:57:37 +0200764 BlockDriverState *bs, *base_bs;
Max Reitz687fa1d2014-10-24 15:57:39 +0200765 bool progress = false, quiet = false, drop = false;
Max Reitzd4a32382014-10-24 15:57:37 +0200766 Error *local_err = NULL;
767 CommonBlockJobCBInfo cbi;
bellardea2384d2004-08-01 21:59:26 +0000768
769 fmt = NULL;
Federico Simoncelli661a0f72011-06-20 12:48:19 -0400770 cache = BDRV_DEFAULT_CACHE;
Max Reitz1b22bff2014-10-24 15:57:40 +0200771 base = NULL;
bellardea2384d2004-08-01 21:59:26 +0000772 for(;;) {
Max Reitz1b22bff2014-10-24 15:57:40 +0200773 c = getopt(argc, argv, "f:ht:b:dpq");
Jes Sorensenb8fb60d2010-12-06 15:25:39 +0100774 if (c == -1) {
bellardea2384d2004-08-01 21:59:26 +0000775 break;
Jes Sorensenb8fb60d2010-12-06 15:25:39 +0100776 }
bellardea2384d2004-08-01 21:59:26 +0000777 switch(c) {
Jes Sorensenef873942010-12-06 15:25:40 +0100778 case '?':
bellardea2384d2004-08-01 21:59:26 +0000779 case 'h':
780 help();
781 break;
782 case 'f':
783 fmt = optarg;
784 break;
Federico Simoncelli661a0f72011-06-20 12:48:19 -0400785 case 't':
786 cache = optarg;
787 break;
Max Reitz1b22bff2014-10-24 15:57:40 +0200788 case 'b':
789 base = optarg;
790 /* -b implies -d */
791 drop = true;
792 break;
Max Reitz9a86fe42014-10-24 15:57:38 +0200793 case 'd':
794 drop = true;
795 break;
Max Reitz687fa1d2014-10-24 15:57:39 +0200796 case 'p':
797 progress = true;
798 break;
Miroslav Rezaninaf382d432013-02-13 09:09:40 +0100799 case 'q':
800 quiet = true;
801 break;
bellardea2384d2004-08-01 21:59:26 +0000802 }
803 }
Max Reitz687fa1d2014-10-24 15:57:39 +0200804
805 /* Progress is not shown in Quiet mode */
806 if (quiet) {
807 progress = false;
808 }
809
Kevin Wolffc11eb22013-08-05 10:53:04 +0200810 if (optind != argc - 1) {
Fam Zhengac1307a2014-04-22 13:36:11 +0800811 error_exit("Expecting one image file name");
Jes Sorensenb8fb60d2010-12-06 15:25:39 +0100812 }
bellardea2384d2004-08-01 21:59:26 +0000813 filename = argv[optind++];
814
Max Reitz9a86fe42014-10-24 15:57:38 +0200815 flags = BDRV_O_RDWR | BDRV_O_UNMAP;
Stefan Hajnoczic3993cd2011-08-04 12:26:51 +0100816 ret = bdrv_parse_cache_flags(cache, &flags);
Federico Simoncelli661a0f72011-06-20 12:48:19 -0400817 if (ret < 0) {
818 error_report("Invalid cache option: %s", cache);
Stefan Hajnoczia3981eb2014-08-26 19:17:54 +0100819 return 1;
Federico Simoncelli661a0f72011-06-20 12:48:19 -0400820 }
821
Markus Armbruster7e7d56d2014-10-07 13:59:05 +0200822 blk = img_open("image", filename, fmt, flags, true, quiet);
823 if (!blk) {
824 return 1;
MORITA Kazutakac2abcce2010-06-21 04:26:35 +0900825 }
Markus Armbruster7e7d56d2014-10-07 13:59:05 +0200826 bs = blk_bs(blk);
827
Max Reitz687fa1d2014-10-24 15:57:39 +0200828 qemu_progress_init(progress, 1.f);
829 qemu_progress_print(0.f, 100);
830
Max Reitz1b22bff2014-10-24 15:57:40 +0200831 if (base) {
832 base_bs = bdrv_find_backing_image(bs, base);
833 if (!base_bs) {
834 error_set(&local_err, QERR_BASE_NOT_FOUND, base);
835 goto done;
836 }
837 } else {
838 /* This is different from QMP, which by default uses the deepest file in
839 * the backing chain (i.e., the very base); however, the traditional
840 * behavior of qemu-img commit is using the immediate backing file. */
841 base_bs = bs->backing_hd;
842 if (!base_bs) {
843 error_setg(&local_err, "Image does not have a backing file");
844 goto done;
845 }
bellardea2384d2004-08-01 21:59:26 +0000846 }
847
Max Reitzd4a32382014-10-24 15:57:37 +0200848 cbi = (CommonBlockJobCBInfo){
849 .errp = &local_err,
850 .bs = bs,
851 };
852
853 commit_active_start(bs, base_bs, 0, BLOCKDEV_ON_ERROR_REPORT,
854 common_block_job_cb, &cbi, &local_err);
855 if (local_err) {
856 goto done;
857 }
858
Max Reitz9a86fe42014-10-24 15:57:38 +0200859 /* The block job will swap base_bs and bs (which is not what we really want
860 * here, but okay) and unref base_bs (after the swap, i.e., the old top
861 * image). In order to still be able to empty that top image afterwards,
862 * increment the reference counter here preemptively. */
863 if (!drop) {
864 bdrv_ref(base_bs);
865 }
866
Max Reitzd4a32382014-10-24 15:57:37 +0200867 run_block_job(bs->job, &local_err);
Max Reitz9a86fe42014-10-24 15:57:38 +0200868 if (local_err) {
869 goto unref_backing;
870 }
871
872 if (!drop && base_bs->drv->bdrv_make_empty) {
873 ret = base_bs->drv->bdrv_make_empty(base_bs);
874 if (ret) {
875 error_setg_errno(&local_err, -ret, "Could not empty %s",
876 filename);
877 goto unref_backing;
878 }
879 }
880
881unref_backing:
882 if (!drop) {
883 bdrv_unref(base_bs);
884 }
Max Reitzd4a32382014-10-24 15:57:37 +0200885
886done:
Max Reitz687fa1d2014-10-24 15:57:39 +0200887 qemu_progress_end();
888
Markus Armbruster26f54e92014-10-07 13:59:04 +0200889 blk_unref(blk);
Max Reitzd4a32382014-10-24 15:57:37 +0200890
891 if (local_err) {
Markus Armbruster6936f292015-02-10 15:14:02 +0100892 error_report_err(local_err);
MORITA Kazutakac2abcce2010-06-21 04:26:35 +0900893 return 1;
894 }
Max Reitzd4a32382014-10-24 15:57:37 +0200895
896 qprintf(quiet, "Image committed.\n");
bellardea2384d2004-08-01 21:59:26 +0000897 return 0;
898}
899
Dmitry Konishchevf6a00aa2011-05-18 15:03:59 +0400900/*
thsf58c7b32008-06-05 21:53:49 +0000901 * Returns true iff the first sector pointed to by 'buf' contains at least
902 * a non-NUL byte.
903 *
904 * 'pnum' is set to the number of sectors (including and immediately following
905 * the first one) that are known to be in the same allocated/unallocated state.
906 */
bellardea2384d2004-08-01 21:59:26 +0000907static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum)
908{
Stefan Hajnoczi1a6d39f2012-02-07 13:27:24 +0000909 bool is_zero;
910 int i;
bellardea2384d2004-08-01 21:59:26 +0000911
912 if (n <= 0) {
913 *pnum = 0;
914 return 0;
915 }
Stefan Hajnoczi1a6d39f2012-02-07 13:27:24 +0000916 is_zero = buffer_is_zero(buf, 512);
bellardea2384d2004-08-01 21:59:26 +0000917 for(i = 1; i < n; i++) {
918 buf += 512;
Stefan Hajnoczi1a6d39f2012-02-07 13:27:24 +0000919 if (is_zero != buffer_is_zero(buf, 512)) {
bellardea2384d2004-08-01 21:59:26 +0000920 break;
Stefan Hajnoczi1a6d39f2012-02-07 13:27:24 +0000921 }
bellardea2384d2004-08-01 21:59:26 +0000922 }
923 *pnum = i;
Stefan Hajnoczi1a6d39f2012-02-07 13:27:24 +0000924 return !is_zero;
bellardea2384d2004-08-01 21:59:26 +0000925}
926
Kevin Wolf3e85c6f2010-01-12 12:55:18 +0100927/*
Kevin Wolfa22f1232011-08-26 15:27:13 +0200928 * Like is_allocated_sectors, but if the buffer starts with a used sector,
929 * up to 'min' consecutive sectors containing zeros are ignored. This avoids
930 * breaking up write requests for only small sparse areas.
931 */
932static int is_allocated_sectors_min(const uint8_t *buf, int n, int *pnum,
933 int min)
934{
935 int ret;
936 int num_checked, num_used;
937
938 if (n < min) {
939 min = n;
940 }
941
942 ret = is_allocated_sectors(buf, n, pnum);
943 if (!ret) {
944 return ret;
945 }
946
947 num_used = *pnum;
948 buf += BDRV_SECTOR_SIZE * *pnum;
949 n -= *pnum;
950 num_checked = num_used;
951
952 while (n > 0) {
953 ret = is_allocated_sectors(buf, n, pnum);
954
955 buf += BDRV_SECTOR_SIZE * *pnum;
956 n -= *pnum;
957 num_checked += *pnum;
958 if (ret) {
959 num_used = num_checked;
960 } else if (*pnum >= min) {
961 break;
962 }
963 }
964
965 *pnum = num_used;
966 return 1;
967}
968
969/*
Kevin Wolf3e85c6f2010-01-12 12:55:18 +0100970 * Compares two buffers sector by sector. Returns 0 if the first sector of both
971 * buffers matches, non-zero otherwise.
972 *
973 * pnum is set to the number of sectors (including and immediately following
974 * the first one) that are known to have the same comparison result
975 */
976static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n,
977 int *pnum)
978{
979 int res, i;
980
981 if (n <= 0) {
982 *pnum = 0;
983 return 0;
984 }
985
986 res = !!memcmp(buf1, buf2, 512);
987 for(i = 1; i < n; i++) {
988 buf1 += 512;
989 buf2 += 512;
990
991 if (!!memcmp(buf1, buf2, 512) != res) {
992 break;
993 }
994 }
995
996 *pnum = i;
997 return res;
998}
999
Kevin Wolf80ee15a2009-09-15 12:30:43 +02001000#define IO_BUF_SIZE (2 * 1024 * 1024)
bellardea2384d2004-08-01 21:59:26 +00001001
Miroslav Rezaninad14ed182013-02-13 09:09:41 +01001002static int64_t sectors_to_bytes(int64_t sectors)
1003{
1004 return sectors << BDRV_SECTOR_BITS;
1005}
1006
1007static int64_t sectors_to_process(int64_t total, int64_t from)
1008{
1009 return MIN(total - from, IO_BUF_SIZE >> BDRV_SECTOR_BITS);
1010}
1011
1012/*
1013 * Check if passed sectors are empty (not allocated or contain only 0 bytes)
1014 *
1015 * Returns 0 in case sectors are filled with 0, 1 if sectors contain non-zero
1016 * data and negative value on error.
1017 *
1018 * @param bs: Driver used for accessing file
1019 * @param sect_num: Number of first sector to check
1020 * @param sect_count: Number of sectors to check
1021 * @param filename: Name of disk file we are checking (logging purpose)
1022 * @param buffer: Allocated buffer for storing read data
1023 * @param quiet: Flag for quiet mode
1024 */
1025static int check_empty_sectors(BlockDriverState *bs, int64_t sect_num,
1026 int sect_count, const char *filename,
1027 uint8_t *buffer, bool quiet)
1028{
1029 int pnum, ret = 0;
1030 ret = bdrv_read(bs, sect_num, buffer, sect_count);
1031 if (ret < 0) {
1032 error_report("Error while reading offset %" PRId64 " of %s: %s",
1033 sectors_to_bytes(sect_num), filename, strerror(-ret));
1034 return ret;
1035 }
1036 ret = is_allocated_sectors(buffer, sect_count, &pnum);
1037 if (ret || pnum != sect_count) {
1038 qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n",
1039 sectors_to_bytes(ret ? sect_num : sect_num + pnum));
1040 return 1;
1041 }
1042
1043 return 0;
1044}
1045
1046/*
1047 * Compares two images. Exit codes:
1048 *
1049 * 0 - Images are identical
1050 * 1 - Images differ
1051 * >1 - Error occurred
1052 */
1053static int img_compare(int argc, char **argv)
1054{
Max Reitz40055952014-07-22 22:58:42 +02001055 const char *fmt1 = NULL, *fmt2 = NULL, *cache, *filename1, *filename2;
Markus Armbruster26f54e92014-10-07 13:59:04 +02001056 BlockBackend *blk1, *blk2;
Miroslav Rezaninad14ed182013-02-13 09:09:41 +01001057 BlockDriverState *bs1, *bs2;
1058 int64_t total_sectors1, total_sectors2;
1059 uint8_t *buf1 = NULL, *buf2 = NULL;
1060 int pnum1, pnum2;
1061 int allocated1, allocated2;
1062 int ret = 0; /* return value - 0 Ident, 1 Different, >1 Error */
1063 bool progress = false, quiet = false, strict = false;
Max Reitz40055952014-07-22 22:58:42 +02001064 int flags;
Miroslav Rezaninad14ed182013-02-13 09:09:41 +01001065 int64_t total_sectors;
1066 int64_t sector_num = 0;
1067 int64_t nb_sectors;
1068 int c, pnum;
Miroslav Rezaninad14ed182013-02-13 09:09:41 +01001069 uint64_t progress_base;
1070
Max Reitz40055952014-07-22 22:58:42 +02001071 cache = BDRV_DEFAULT_CACHE;
Miroslav Rezaninad14ed182013-02-13 09:09:41 +01001072 for (;;) {
Max Reitz40055952014-07-22 22:58:42 +02001073 c = getopt(argc, argv, "hf:F:T:pqs");
Miroslav Rezaninad14ed182013-02-13 09:09:41 +01001074 if (c == -1) {
1075 break;
1076 }
1077 switch (c) {
1078 case '?':
1079 case 'h':
1080 help();
1081 break;
1082 case 'f':
1083 fmt1 = optarg;
1084 break;
1085 case 'F':
1086 fmt2 = optarg;
1087 break;
Max Reitz40055952014-07-22 22:58:42 +02001088 case 'T':
1089 cache = optarg;
1090 break;
Miroslav Rezaninad14ed182013-02-13 09:09:41 +01001091 case 'p':
1092 progress = true;
1093 break;
1094 case 'q':
1095 quiet = true;
1096 break;
1097 case 's':
1098 strict = true;
1099 break;
1100 }
1101 }
1102
1103 /* Progress is not shown in Quiet mode */
1104 if (quiet) {
1105 progress = false;
1106 }
1107
1108
Kevin Wolffc11eb22013-08-05 10:53:04 +02001109 if (optind != argc - 2) {
Fam Zhengac1307a2014-04-22 13:36:11 +08001110 error_exit("Expecting two image file names");
Miroslav Rezaninad14ed182013-02-13 09:09:41 +01001111 }
1112 filename1 = argv[optind++];
1113 filename2 = argv[optind++];
1114
Stefan Hajnoczicbda0162014-08-26 19:17:55 +01001115 /* Initialize before goto out */
1116 qemu_progress_init(progress, 2.0);
1117
Max Reitz40055952014-07-22 22:58:42 +02001118 flags = BDRV_O_FLAGS;
1119 ret = bdrv_parse_cache_flags(cache, &flags);
1120 if (ret < 0) {
1121 error_report("Invalid source cache option: %s", cache);
1122 ret = 2;
1123 goto out3;
1124 }
1125
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02001126 blk1 = img_open("image_1", filename1, fmt1, flags, true, quiet);
1127 if (!blk1) {
Miroslav Rezaninad14ed182013-02-13 09:09:41 +01001128 ret = 2;
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02001129 goto out3;
1130 }
1131 bs1 = blk_bs(blk1);
1132
1133 blk2 = img_open("image_2", filename2, fmt2, flags, true, quiet);
1134 if (!blk2) {
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02001135 ret = 2;
Markus Armbruster26f54e92014-10-07 13:59:04 +02001136 goto out2;
Miroslav Rezaninad14ed182013-02-13 09:09:41 +01001137 }
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02001138 bs2 = blk_bs(blk2);
Miroslav Rezaninad14ed182013-02-13 09:09:41 +01001139
1140 buf1 = qemu_blockalign(bs1, IO_BUF_SIZE);
1141 buf2 = qemu_blockalign(bs2, IO_BUF_SIZE);
Markus Armbruster52bf1e72014-06-26 13:23:25 +02001142 total_sectors1 = bdrv_nb_sectors(bs1);
1143 if (total_sectors1 < 0) {
1144 error_report("Can't get size of %s: %s",
1145 filename1, strerror(-total_sectors1));
1146 ret = 4;
1147 goto out;
1148 }
1149 total_sectors2 = bdrv_nb_sectors(bs2);
1150 if (total_sectors2 < 0) {
1151 error_report("Can't get size of %s: %s",
1152 filename2, strerror(-total_sectors2));
1153 ret = 4;
1154 goto out;
1155 }
Miroslav Rezaninad14ed182013-02-13 09:09:41 +01001156 total_sectors = MIN(total_sectors1, total_sectors2);
1157 progress_base = MAX(total_sectors1, total_sectors2);
1158
1159 qemu_progress_print(0, 100);
1160
1161 if (strict && total_sectors1 != total_sectors2) {
1162 ret = 1;
1163 qprintf(quiet, "Strict mode: Image size mismatch!\n");
1164 goto out;
1165 }
1166
1167 for (;;) {
1168 nb_sectors = sectors_to_process(total_sectors, sector_num);
1169 if (nb_sectors <= 0) {
1170 break;
1171 }
1172 allocated1 = bdrv_is_allocated_above(bs1, NULL, sector_num, nb_sectors,
1173 &pnum1);
1174 if (allocated1 < 0) {
1175 ret = 3;
1176 error_report("Sector allocation test failed for %s", filename1);
1177 goto out;
1178 }
1179
1180 allocated2 = bdrv_is_allocated_above(bs2, NULL, sector_num, nb_sectors,
1181 &pnum2);
1182 if (allocated2 < 0) {
1183 ret = 3;
1184 error_report("Sector allocation test failed for %s", filename2);
1185 goto out;
1186 }
1187 nb_sectors = MIN(pnum1, pnum2);
1188
1189 if (allocated1 == allocated2) {
1190 if (allocated1) {
1191 ret = bdrv_read(bs1, sector_num, buf1, nb_sectors);
1192 if (ret < 0) {
1193 error_report("Error while reading offset %" PRId64 " of %s:"
1194 " %s", sectors_to_bytes(sector_num), filename1,
1195 strerror(-ret));
1196 ret = 4;
1197 goto out;
1198 }
1199 ret = bdrv_read(bs2, sector_num, buf2, nb_sectors);
1200 if (ret < 0) {
1201 error_report("Error while reading offset %" PRId64
1202 " of %s: %s", sectors_to_bytes(sector_num),
1203 filename2, strerror(-ret));
1204 ret = 4;
1205 goto out;
1206 }
1207 ret = compare_sectors(buf1, buf2, nb_sectors, &pnum);
1208 if (ret || pnum != nb_sectors) {
Miroslav Rezaninad14ed182013-02-13 09:09:41 +01001209 qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n",
1210 sectors_to_bytes(
1211 ret ? sector_num : sector_num + pnum));
Fam Zheng36452f12013-11-13 20:26:49 +08001212 ret = 1;
Miroslav Rezaninad14ed182013-02-13 09:09:41 +01001213 goto out;
1214 }
1215 }
1216 } else {
1217 if (strict) {
1218 ret = 1;
1219 qprintf(quiet, "Strict mode: Offset %" PRId64
1220 " allocation mismatch!\n",
1221 sectors_to_bytes(sector_num));
1222 goto out;
1223 }
1224
1225 if (allocated1) {
1226 ret = check_empty_sectors(bs1, sector_num, nb_sectors,
1227 filename1, buf1, quiet);
1228 } else {
1229 ret = check_empty_sectors(bs2, sector_num, nb_sectors,
1230 filename2, buf1, quiet);
1231 }
1232 if (ret) {
1233 if (ret < 0) {
Miroslav Rezaninad14ed182013-02-13 09:09:41 +01001234 error_report("Error while reading offset %" PRId64 ": %s",
1235 sectors_to_bytes(sector_num), strerror(-ret));
Fam Zheng36452f12013-11-13 20:26:49 +08001236 ret = 4;
Miroslav Rezaninad14ed182013-02-13 09:09:41 +01001237 }
1238 goto out;
1239 }
1240 }
1241 sector_num += nb_sectors;
1242 qemu_progress_print(((float) nb_sectors / progress_base)*100, 100);
1243 }
1244
1245 if (total_sectors1 != total_sectors2) {
1246 BlockDriverState *bs_over;
1247 int64_t total_sectors_over;
1248 const char *filename_over;
1249
1250 qprintf(quiet, "Warning: Image size mismatch!\n");
1251 if (total_sectors1 > total_sectors2) {
1252 total_sectors_over = total_sectors1;
1253 bs_over = bs1;
1254 filename_over = filename1;
1255 } else {
1256 total_sectors_over = total_sectors2;
1257 bs_over = bs2;
1258 filename_over = filename2;
1259 }
1260
1261 for (;;) {
1262 nb_sectors = sectors_to_process(total_sectors_over, sector_num);
1263 if (nb_sectors <= 0) {
1264 break;
1265 }
1266 ret = bdrv_is_allocated_above(bs_over, NULL, sector_num,
1267 nb_sectors, &pnum);
1268 if (ret < 0) {
1269 ret = 3;
1270 error_report("Sector allocation test failed for %s",
1271 filename_over);
1272 goto out;
1273
1274 }
1275 nb_sectors = pnum;
1276 if (ret) {
1277 ret = check_empty_sectors(bs_over, sector_num, nb_sectors,
1278 filename_over, buf1, quiet);
1279 if (ret) {
1280 if (ret < 0) {
Miroslav Rezaninad14ed182013-02-13 09:09:41 +01001281 error_report("Error while reading offset %" PRId64
1282 " of %s: %s", sectors_to_bytes(sector_num),
1283 filename_over, strerror(-ret));
Fam Zheng36452f12013-11-13 20:26:49 +08001284 ret = 4;
Miroslav Rezaninad14ed182013-02-13 09:09:41 +01001285 }
1286 goto out;
1287 }
1288 }
1289 sector_num += nb_sectors;
1290 qemu_progress_print(((float) nb_sectors / progress_base)*100, 100);
1291 }
1292 }
1293
1294 qprintf(quiet, "Images are identical.\n");
1295 ret = 0;
1296
1297out:
Miroslav Rezaninad14ed182013-02-13 09:09:41 +01001298 qemu_vfree(buf1);
1299 qemu_vfree(buf2);
Markus Armbruster26f54e92014-10-07 13:59:04 +02001300 blk_unref(blk2);
Miroslav Rezaninad14ed182013-02-13 09:09:41 +01001301out2:
Markus Armbruster26f54e92014-10-07 13:59:04 +02001302 blk_unref(blk1);
Miroslav Rezaninad14ed182013-02-13 09:09:41 +01001303out3:
1304 qemu_progress_end();
1305 return ret;
1306}
1307
bellardea2384d2004-08-01 21:59:26 +00001308static int img_convert(int argc, char **argv)
1309{
Peter Lieven24f833c2013-11-27 11:07:07 +01001310 int c, n, n1, bs_n, bs_i, compress, cluster_sectors, skip_create;
Peter Lieven13c28af2013-11-27 11:07:01 +01001311 int64_t ret = 0;
Max Reitz40055952014-07-22 22:58:42 +02001312 int progress = 0, flags, src_flags;
1313 const char *fmt, *out_fmt, *cache, *src_cache, *out_baseimg, *out_filename;
MORITA Kazutakab50cbab2010-05-26 11:35:36 +09001314 BlockDriver *drv, *proto_drv;
Markus Armbruster26f54e92014-10-07 13:59:04 +02001315 BlockBackend **blk = NULL, *out_blk = NULL;
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09001316 BlockDriverState **bs = NULL, *out_bs = NULL;
Peter Lieven802c3d42013-12-05 15:54:53 +01001317 int64_t total_sectors, nb_sectors, sector_num, bs_offset;
Markus Armbruster52bf1e72014-06-26 13:23:25 +02001318 int64_t *bs_sectors = NULL;
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09001319 uint8_t * buf = NULL;
Peter Lievenf2521c92013-11-27 11:07:06 +01001320 size_t bufsectors = IO_BUF_SIZE / BDRV_SECTOR_SIZE;
bellardea2384d2004-08-01 21:59:26 +00001321 const uint8_t *buf1;
bellardfaea38e2006-08-05 21:31:00 +00001322 BlockDriverInfo bdi;
Chunyan Liu83d05212014-06-05 17:20:51 +08001323 QemuOpts *opts = NULL;
1324 QemuOptsList *create_opts = NULL;
1325 const char *out_baseimg_param;
Kevin Wolfefa84d42009-05-18 16:42:12 +02001326 char *options = NULL;
edison51ef6722010-09-21 19:58:41 -07001327 const char *snapshot_name = NULL;
Kevin Wolfa22f1232011-08-26 15:27:13 +02001328 int min_sparse = 8; /* Need at least 4k of zeros for sparse detection */
Miroslav Rezaninaf382d432013-02-13 09:09:40 +01001329 bool quiet = false;
Max Reitzcc84d902013-09-06 17:14:26 +02001330 Error *local_err = NULL;
Wenchao Xiaef806542013-12-04 17:10:57 +08001331 QemuOpts *sn_opts = NULL;
bellardea2384d2004-08-01 21:59:26 +00001332
1333 fmt = NULL;
1334 out_fmt = "raw";
Federico Simoncelli661a0f72011-06-20 12:48:19 -04001335 cache = "unsafe";
Max Reitz40055952014-07-22 22:58:42 +02001336 src_cache = BDRV_DEFAULT_CACHE;
thsf58c7b32008-06-05 21:53:49 +00001337 out_baseimg = NULL;
Jes Sorenseneec77d92010-12-07 17:44:34 +01001338 compress = 0;
Alexandre Derumierb2e10492013-09-02 19:07:24 +01001339 skip_create = 0;
bellardea2384d2004-08-01 21:59:26 +00001340 for(;;) {
Max Reitz40055952014-07-22 22:58:42 +02001341 c = getopt(argc, argv, "hf:O:B:ce6o:s:l:S:pt:T:qn");
Jes Sorensenb8fb60d2010-12-06 15:25:39 +01001342 if (c == -1) {
bellardea2384d2004-08-01 21:59:26 +00001343 break;
Jes Sorensenb8fb60d2010-12-06 15:25:39 +01001344 }
bellardea2384d2004-08-01 21:59:26 +00001345 switch(c) {
Jes Sorensenef873942010-12-06 15:25:40 +01001346 case '?':
bellardea2384d2004-08-01 21:59:26 +00001347 case 'h':
1348 help();
1349 break;
1350 case 'f':
1351 fmt = optarg;
1352 break;
1353 case 'O':
1354 out_fmt = optarg;
1355 break;
thsf58c7b32008-06-05 21:53:49 +00001356 case 'B':
1357 out_baseimg = optarg;
1358 break;
bellardea2384d2004-08-01 21:59:26 +00001359 case 'c':
Jes Sorenseneec77d92010-12-07 17:44:34 +01001360 compress = 1;
bellardea2384d2004-08-01 21:59:26 +00001361 break;
1362 case 'e':
Markus Armbruster9d42e152011-06-22 14:03:55 +02001363 error_report("option -e is deprecated, please use \'-o "
Jes Sorenseneec77d92010-12-07 17:44:34 +01001364 "encryption\' instead!");
Kevin Wolf2dc83282014-02-21 16:24:05 +01001365 ret = -1;
Kevin Wolf64bb01a2014-03-03 14:54:07 +01001366 goto fail_getopt;
thsec36ba12007-09-16 21:59:02 +00001367 case '6':
Markus Armbruster9d42e152011-06-22 14:03:55 +02001368 error_report("option -6 is deprecated, please use \'-o "
Jes Sorenseneec77d92010-12-07 17:44:34 +01001369 "compat6\' instead!");
Kevin Wolf2dc83282014-02-21 16:24:05 +01001370 ret = -1;
Kevin Wolf64bb01a2014-03-03 14:54:07 +01001371 goto fail_getopt;
Kevin Wolfefa84d42009-05-18 16:42:12 +02001372 case 'o':
Kevin Wolf2dc83282014-02-21 16:24:05 +01001373 if (!is_valid_option_list(optarg)) {
1374 error_report("Invalid option list: %s", optarg);
1375 ret = -1;
Kevin Wolf64bb01a2014-03-03 14:54:07 +01001376 goto fail_getopt;
Kevin Wolf2dc83282014-02-21 16:24:05 +01001377 }
1378 if (!options) {
1379 options = g_strdup(optarg);
1380 } else {
1381 char *old_options = options;
1382 options = g_strdup_printf("%s,%s", options, optarg);
1383 g_free(old_options);
1384 }
Kevin Wolfefa84d42009-05-18 16:42:12 +02001385 break;
edison51ef6722010-09-21 19:58:41 -07001386 case 's':
1387 snapshot_name = optarg;
1388 break;
Wenchao Xiaef806542013-12-04 17:10:57 +08001389 case 'l':
1390 if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) {
1391 sn_opts = qemu_opts_parse(&internal_snapshot_opts, optarg, 0);
1392 if (!sn_opts) {
1393 error_report("Failed in parsing snapshot param '%s'",
1394 optarg);
Kevin Wolf2dc83282014-02-21 16:24:05 +01001395 ret = -1;
Kevin Wolf64bb01a2014-03-03 14:54:07 +01001396 goto fail_getopt;
Wenchao Xiaef806542013-12-04 17:10:57 +08001397 }
1398 } else {
1399 snapshot_name = optarg;
1400 }
1401 break;
Kevin Wolfa22f1232011-08-26 15:27:13 +02001402 case 'S':
1403 {
1404 int64_t sval;
Markus Armbrustere36b3692011-11-22 09:46:05 +01001405 char *end;
1406 sval = strtosz_suffix(optarg, &end, STRTOSZ_DEFSUFFIX_B);
1407 if (sval < 0 || *end) {
Kevin Wolfa22f1232011-08-26 15:27:13 +02001408 error_report("Invalid minimum zero buffer size for sparse output specified");
Kevin Wolf2dc83282014-02-21 16:24:05 +01001409 ret = -1;
Kevin Wolf64bb01a2014-03-03 14:54:07 +01001410 goto fail_getopt;
Kevin Wolfa22f1232011-08-26 15:27:13 +02001411 }
1412
1413 min_sparse = sval / BDRV_SECTOR_SIZE;
1414 break;
1415 }
Jes Sorensen6b837bc2011-03-30 14:16:25 +02001416 case 'p':
1417 progress = 1;
1418 break;
Federico Simoncelli661a0f72011-06-20 12:48:19 -04001419 case 't':
1420 cache = optarg;
1421 break;
Max Reitz40055952014-07-22 22:58:42 +02001422 case 'T':
1423 src_cache = optarg;
1424 break;
Miroslav Rezaninaf382d432013-02-13 09:09:40 +01001425 case 'q':
1426 quiet = true;
1427 break;
Alexandre Derumierb2e10492013-09-02 19:07:24 +01001428 case 'n':
1429 skip_create = 1;
1430 break;
bellardea2384d2004-08-01 21:59:26 +00001431 }
1432 }
ths3b46e622007-09-17 08:09:54 +00001433
Kevin Wolf64bb01a2014-03-03 14:54:07 +01001434 /* Initialize before goto out */
Miroslav Rezaninaf382d432013-02-13 09:09:40 +01001435 if (quiet) {
1436 progress = 0;
1437 }
Kevin Wolf64bb01a2014-03-03 14:54:07 +01001438 qemu_progress_init(progress, 1.0);
1439
Miroslav Rezaninaf382d432013-02-13 09:09:40 +01001440
balrog926c2d22007-10-31 01:11:44 +00001441 bs_n = argc - optind - 1;
Kevin Wolfa283cb62014-02-21 16:24:07 +01001442 out_filename = bs_n >= 1 ? argv[argc - 1] : NULL;
thsf58c7b32008-06-05 21:53:49 +00001443
Kevin Wolf2dc83282014-02-21 16:24:05 +01001444 if (options && has_help_option(options)) {
Jes Sorensen4ac8aac2010-12-06 15:25:38 +01001445 ret = print_block_option_help(out_filename, out_fmt);
1446 goto out;
1447 }
1448
bellardea2384d2004-08-01 21:59:26 +00001449 if (bs_n < 1) {
Fam Zhengac1307a2014-04-22 13:36:11 +08001450 error_exit("Must specify image file name");
ths5fafdf22007-09-16 21:08:06 +00001451 }
bellardea2384d2004-08-01 21:59:26 +00001452
thsf58c7b32008-06-05 21:53:49 +00001453
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09001454 if (bs_n > 1 && out_baseimg) {
Jes Sorensen15654a62010-12-16 14:31:53 +01001455 error_report("-B makes no sense when concatenating multiple input "
1456 "images");
Jes Sorensen31ca34b2010-12-06 15:25:36 +01001457 ret = -1;
1458 goto out;
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09001459 }
Dong Xu Wangf8111c22012-03-15 20:13:31 +08001460
Max Reitz40055952014-07-22 22:58:42 +02001461 src_flags = BDRV_O_FLAGS;
1462 ret = bdrv_parse_cache_flags(src_cache, &src_flags);
1463 if (ret < 0) {
1464 error_report("Invalid source cache option: %s", src_cache);
1465 goto out;
1466 }
1467
Jes Sorensen6b837bc2011-03-30 14:16:25 +02001468 qemu_progress_print(0, 100);
1469
Markus Armbruster26f54e92014-10-07 13:59:04 +02001470 blk = g_new0(BlockBackend *, bs_n);
Markus Armbrusterd739f1c2014-06-26 13:23:24 +02001471 bs = g_new0(BlockDriverState *, bs_n);
Markus Armbruster52bf1e72014-06-26 13:23:25 +02001472 bs_sectors = g_new(int64_t, bs_n);
balrog926c2d22007-10-31 01:11:44 +00001473
1474 total_sectors = 0;
1475 for (bs_i = 0; bs_i < bs_n; bs_i++) {
Kevin Wolf9aebf3b2014-09-25 09:54:02 +02001476 char *id = bs_n > 1 ? g_strdup_printf("source_%d", bs_i)
Kevin Wolf9ffe3332014-04-17 16:57:13 +02001477 : g_strdup("source");
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02001478 blk[bs_i] = img_open(id, argv[optind + bs_i], fmt, src_flags,
1479 true, quiet);
Kevin Wolf9ffe3332014-04-17 16:57:13 +02001480 g_free(id);
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02001481 if (!blk[bs_i]) {
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09001482 ret = -1;
1483 goto out;
1484 }
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02001485 bs[bs_i] = blk_bs(blk[bs_i]);
Markus Armbruster52bf1e72014-06-26 13:23:25 +02001486 bs_sectors[bs_i] = bdrv_nb_sectors(bs[bs_i]);
1487 if (bs_sectors[bs_i] < 0) {
1488 error_report("Could not get size of %s: %s",
1489 argv[optind + bs_i], strerror(-bs_sectors[bs_i]));
1490 ret = -1;
1491 goto out;
1492 }
Markus Armbrusterd739f1c2014-06-26 13:23:24 +02001493 total_sectors += bs_sectors[bs_i];
balrog926c2d22007-10-31 01:11:44 +00001494 }
bellardea2384d2004-08-01 21:59:26 +00001495
Wenchao Xiaef806542013-12-04 17:10:57 +08001496 if (sn_opts) {
1497 ret = bdrv_snapshot_load_tmp(bs[0],
1498 qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID),
1499 qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME),
1500 &local_err);
1501 } else if (snapshot_name != NULL) {
edison51ef6722010-09-21 19:58:41 -07001502 if (bs_n > 1) {
Markus Armbruster6daf1942011-06-22 14:03:54 +02001503 error_report("No support for concatenating multiple snapshot");
edison51ef6722010-09-21 19:58:41 -07001504 ret = -1;
1505 goto out;
1506 }
Wenchao Xia7b4c4782013-12-04 17:10:54 +08001507
1508 bdrv_snapshot_load_tmp_by_id_or_name(bs[0], snapshot_name, &local_err);
Wenchao Xiaef806542013-12-04 17:10:57 +08001509 }
Markus Armbruster84d18f02014-01-30 15:07:28 +01001510 if (local_err) {
Wenchao Xiaef806542013-12-04 17:10:57 +08001511 error_report("Failed to load snapshot: %s",
1512 error_get_pretty(local_err));
1513 error_free(local_err);
1514 ret = -1;
1515 goto out;
edison51ef6722010-09-21 19:58:41 -07001516 }
1517
Kevin Wolfefa84d42009-05-18 16:42:12 +02001518 /* Find driver and parse its options */
bellardea2384d2004-08-01 21:59:26 +00001519 drv = bdrv_find_format(out_fmt);
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09001520 if (!drv) {
Jes Sorensen15654a62010-12-16 14:31:53 +01001521 error_report("Unknown file format '%s'", out_fmt);
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09001522 ret = -1;
1523 goto out;
1524 }
balrog926c2d22007-10-31 01:11:44 +00001525
Kevin Wolf98289622013-07-10 15:47:39 +02001526 proto_drv = bdrv_find_protocol(out_filename, true);
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09001527 if (!proto_drv) {
Jes Sorensen15654a62010-12-16 14:31:53 +01001528 error_report("Unknown protocol '%s'", out_filename);
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09001529 ret = -1;
1530 goto out;
1531 }
MORITA Kazutakab50cbab2010-05-26 11:35:36 +09001532
Max Reitzf75613c2014-12-02 18:32:46 +01001533 if (!drv->create_opts) {
1534 error_report("Format driver '%s' does not support image creation",
1535 drv->format_name);
1536 ret = -1;
1537 goto out;
1538 }
1539
1540 if (!proto_drv->create_opts) {
1541 error_report("Protocol driver '%s' does not support image creation",
1542 proto_drv->format_name);
1543 ret = -1;
1544 goto out;
1545 }
1546
Chunyan Liuc282e1f2014-06-05 17:21:11 +08001547 create_opts = qemu_opts_append(create_opts, drv->create_opts);
1548 create_opts = qemu_opts_append(create_opts, proto_drv->create_opts);
Kevin Wolfdb08adf2009-06-04 15:39:38 +02001549
Chunyan Liu83d05212014-06-05 17:20:51 +08001550 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort);
1551 if (options && qemu_opts_do_parse(opts, options, NULL)) {
1552 error_report("Invalid options for file format '%s'", out_fmt);
1553 ret = -1;
1554 goto out;
Kevin Wolfefa84d42009-05-18 16:42:12 +02001555 }
1556
Chunyan Liu83d05212014-06-05 17:20:51 +08001557 qemu_opt_set_number(opts, BLOCK_OPT_SIZE, total_sectors * 512);
1558 ret = add_old_style_options(out_fmt, opts, out_baseimg, NULL);
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09001559 if (ret < 0) {
1560 goto out;
1561 }
Kevin Wolfefa84d42009-05-18 16:42:12 +02001562
Kevin Wolfa18953f2010-10-14 15:46:04 +02001563 /* Get backing file name if -o backing_file was used */
Chunyan Liu83d05212014-06-05 17:20:51 +08001564 out_baseimg_param = qemu_opt_get(opts, BLOCK_OPT_BACKING_FILE);
Kevin Wolfa18953f2010-10-14 15:46:04 +02001565 if (out_baseimg_param) {
Chunyan Liu83d05212014-06-05 17:20:51 +08001566 out_baseimg = out_baseimg_param;
Kevin Wolfa18953f2010-10-14 15:46:04 +02001567 }
1568
Kevin Wolfefa84d42009-05-18 16:42:12 +02001569 /* Check if compression is supported */
Jes Sorenseneec77d92010-12-07 17:44:34 +01001570 if (compress) {
Chunyan Liu83d05212014-06-05 17:20:51 +08001571 bool encryption =
1572 qemu_opt_get_bool(opts, BLOCK_OPT_ENCRYPT, false);
1573 const char *preallocation =
1574 qemu_opt_get(opts, BLOCK_OPT_PREALLOC);
Kevin Wolfefa84d42009-05-18 16:42:12 +02001575
1576 if (!drv->bdrv_write_compressed) {
Jes Sorensen15654a62010-12-16 14:31:53 +01001577 error_report("Compression not supported for this file format");
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09001578 ret = -1;
1579 goto out;
Kevin Wolfefa84d42009-05-18 16:42:12 +02001580 }
1581
Chunyan Liu83d05212014-06-05 17:20:51 +08001582 if (encryption) {
Jes Sorensen15654a62010-12-16 14:31:53 +01001583 error_report("Compression and encryption not supported at "
1584 "the same time");
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09001585 ret = -1;
1586 goto out;
Kevin Wolfefa84d42009-05-18 16:42:12 +02001587 }
Kevin Wolf41521fa2011-10-18 16:19:42 +02001588
Chunyan Liu83d05212014-06-05 17:20:51 +08001589 if (preallocation
1590 && strcmp(preallocation, "off"))
Kevin Wolf41521fa2011-10-18 16:19:42 +02001591 {
1592 error_report("Compression and preallocation not supported at "
1593 "the same time");
1594 ret = -1;
1595 goto out;
1596 }
Kevin Wolfefa84d42009-05-18 16:42:12 +02001597 }
1598
Alexandre Derumierb2e10492013-09-02 19:07:24 +01001599 if (!skip_create) {
1600 /* Create the new image */
Chunyan Liuc282e1f2014-06-05 17:21:11 +08001601 ret = bdrv_create(drv, out_filename, opts, &local_err);
Alexandre Derumierb2e10492013-09-02 19:07:24 +01001602 if (ret < 0) {
Max Reitzcc84d902013-09-06 17:14:26 +02001603 error_report("%s: error while converting %s: %s",
1604 out_filename, out_fmt, error_get_pretty(local_err));
1605 error_free(local_err);
Alexandre Derumierb2e10492013-09-02 19:07:24 +01001606 goto out;
bellardea2384d2004-08-01 21:59:26 +00001607 }
1608 }
ths3b46e622007-09-17 08:09:54 +00001609
Peter Lieven5a37b602013-10-24 12:07:06 +02001610 flags = min_sparse ? (BDRV_O_RDWR | BDRV_O_UNMAP) : BDRV_O_RDWR;
Stefan Hajnoczic3993cd2011-08-04 12:26:51 +01001611 ret = bdrv_parse_cache_flags(cache, &flags);
Federico Simoncelli661a0f72011-06-20 12:48:19 -04001612 if (ret < 0) {
1613 error_report("Invalid cache option: %s", cache);
Markus Armbrusterbb9cd2e2014-05-28 11:17:07 +02001614 goto out;
Federico Simoncelli661a0f72011-06-20 12:48:19 -04001615 }
1616
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02001617 out_blk = img_open("target", out_filename, out_fmt, flags, true, quiet);
1618 if (!out_blk) {
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09001619 ret = -1;
1620 goto out;
1621 }
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02001622 out_bs = blk_bs(out_blk);
bellardea2384d2004-08-01 21:59:26 +00001623
balrog926c2d22007-10-31 01:11:44 +00001624 bs_i = 0;
1625 bs_offset = 0;
Peter Lievenf2521c92013-11-27 11:07:06 +01001626
1627 /* increase bufsectors from the default 4096 (2M) if opt_transfer_length
1628 * or discard_alignment of the out_bs is greater. Limit to 32768 (16MB)
1629 * as maximum. */
1630 bufsectors = MIN(32768,
1631 MAX(bufsectors, MAX(out_bs->bl.opt_transfer_length,
1632 out_bs->bl.discard_alignment))
1633 );
1634
1635 buf = qemu_blockalign(out_bs, bufsectors * BDRV_SECTOR_SIZE);
balrog926c2d22007-10-31 01:11:44 +00001636
Alexandre Derumierb2e10492013-09-02 19:07:24 +01001637 if (skip_create) {
Markus Armbruster43716fa2014-06-26 13:23:21 +02001638 int64_t output_sectors = bdrv_nb_sectors(out_bs);
1639 if (output_sectors < 0) {
Alexandre Derumierb2e10492013-09-02 19:07:24 +01001640 error_report("unable to get output image length: %s\n",
Markus Armbruster43716fa2014-06-26 13:23:21 +02001641 strerror(-output_sectors));
Alexandre Derumierb2e10492013-09-02 19:07:24 +01001642 ret = -1;
1643 goto out;
Markus Armbruster43716fa2014-06-26 13:23:21 +02001644 } else if (output_sectors < total_sectors) {
Alexandre Derumierb2e10492013-09-02 19:07:24 +01001645 error_report("output file is smaller than input file");
1646 ret = -1;
1647 goto out;
1648 }
1649 }
1650
Peter Lieven24f833c2013-11-27 11:07:07 +01001651 cluster_sectors = 0;
1652 ret = bdrv_get_info(out_bs, &bdi);
1653 if (ret < 0) {
1654 if (compress) {
Jes Sorensen15654a62010-12-16 14:31:53 +01001655 error_report("could not get block driver info");
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09001656 goto out;
1657 }
Peter Lieven24f833c2013-11-27 11:07:07 +01001658 } else {
Fam Zheng85f49ca2014-05-06 21:08:43 +08001659 compress = compress || bdi.needs_compressed_writes;
Peter Lieven24f833c2013-11-27 11:07:07 +01001660 cluster_sectors = bdi.cluster_size / BDRV_SECTOR_SIZE;
1661 }
1662
1663 if (compress) {
1664 if (cluster_sectors <= 0 || cluster_sectors > bufsectors) {
Jes Sorensen15654a62010-12-16 14:31:53 +01001665 error_report("invalid cluster size");
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09001666 ret = -1;
1667 goto out;
1668 }
bellardea2384d2004-08-01 21:59:26 +00001669 sector_num = 0;
Jes Sorensen6b837bc2011-03-30 14:16:25 +02001670
1671 nb_sectors = total_sectors;
Jes Sorensen6b837bc2011-03-30 14:16:25 +02001672
bellardea2384d2004-08-01 21:59:26 +00001673 for(;;) {
balrog926c2d22007-10-31 01:11:44 +00001674 int64_t bs_num;
1675 int remainder;
1676 uint8_t *buf2;
1677
bellardea2384d2004-08-01 21:59:26 +00001678 nb_sectors = total_sectors - sector_num;
1679 if (nb_sectors <= 0)
1680 break;
1681 if (nb_sectors >= cluster_sectors)
1682 n = cluster_sectors;
1683 else
1684 n = nb_sectors;
balrog926c2d22007-10-31 01:11:44 +00001685
1686 bs_num = sector_num - bs_offset;
1687 assert (bs_num >= 0);
1688 remainder = n;
1689 buf2 = buf;
1690 while (remainder > 0) {
1691 int nlow;
Markus Armbrusterd739f1c2014-06-26 13:23:24 +02001692 while (bs_num == bs_sectors[bs_i]) {
1693 bs_offset += bs_sectors[bs_i];
balrog926c2d22007-10-31 01:11:44 +00001694 bs_i++;
1695 assert (bs_i < bs_n);
balrog926c2d22007-10-31 01:11:44 +00001696 bs_num = 0;
Blue Swirl0bfcd592010-05-22 08:02:12 +00001697 /* printf("changing part: sector_num=%" PRId64 ", "
1698 "bs_i=%d, bs_offset=%" PRId64 ", bs_sectors=%" PRId64
Markus Armbrusterd739f1c2014-06-26 13:23:24 +02001699 "\n", sector_num, bs_i, bs_offset, bs_sectors[bs_i]); */
balrog926c2d22007-10-31 01:11:44 +00001700 }
Markus Armbrusterd739f1c2014-06-26 13:23:24 +02001701 assert (bs_num < bs_sectors[bs_i]);
balrog926c2d22007-10-31 01:11:44 +00001702
Markus Armbrusterd739f1c2014-06-26 13:23:24 +02001703 nlow = remainder > bs_sectors[bs_i] - bs_num
1704 ? bs_sectors[bs_i] - bs_num : remainder;
balrog926c2d22007-10-31 01:11:44 +00001705
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09001706 ret = bdrv_read(bs[bs_i], bs_num, buf2, nlow);
1707 if (ret < 0) {
Stefan Hajnoczi3fba9d82011-08-17 17:41:09 +01001708 error_report("error while reading sector %" PRId64 ": %s",
1709 bs_num, strerror(-ret));
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09001710 goto out;
1711 }
balrog926c2d22007-10-31 01:11:44 +00001712
1713 buf2 += nlow * 512;
1714 bs_num += nlow;
1715
1716 remainder -= nlow;
1717 }
1718 assert (remainder == 0);
1719
Stefan Hajnoczi54f106d2013-04-15 17:17:33 +02001720 if (!buffer_is_zero(buf, n * BDRV_SECTOR_SIZE)) {
1721 ret = bdrv_write_compressed(out_bs, sector_num, buf, n);
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09001722 if (ret != 0) {
Stefan Hajnoczi3fba9d82011-08-17 17:41:09 +01001723 error_report("error while compressing sector %" PRId64
1724 ": %s", sector_num, strerror(-ret));
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09001725 goto out;
1726 }
bellardea2384d2004-08-01 21:59:26 +00001727 }
1728 sector_num += n;
Peter Lieven13c28af2013-11-27 11:07:01 +01001729 qemu_progress_print(100.0 * sector_num / total_sectors, 0);
bellardea2384d2004-08-01 21:59:26 +00001730 }
bellardfaea38e2006-08-05 21:31:00 +00001731 /* signal EOF to align */
1732 bdrv_write_compressed(out_bs, 0, NULL, 0);
bellardea2384d2004-08-01 21:59:26 +00001733 } else {
Peter Lieven802c3d42013-12-05 15:54:53 +01001734 int64_t sectors_to_read, sectors_read, sector_num_next_status;
1735 bool count_allocated_sectors;
Peter Lieven11b66992013-10-24 12:07:05 +02001736 int has_zero_init = min_sparse ? bdrv_has_zero_init(out_bs) : 0;
Kevin Wolff2feebb2010-04-14 17:30:35 +02001737
Peter Lieven5a37b602013-10-24 12:07:06 +02001738 if (!has_zero_init && bdrv_can_write_zeroes_with_unmap(out_bs)) {
1739 ret = bdrv_make_zero(out_bs, BDRV_REQ_MAY_UNMAP);
1740 if (ret < 0) {
1741 goto out;
1742 }
1743 has_zero_init = 1;
1744 }
1745
Peter Lieven802c3d42013-12-05 15:54:53 +01001746 sectors_to_read = total_sectors;
1747 count_allocated_sectors = progress && (out_baseimg || has_zero_init);
1748restart:
thsf58c7b32008-06-05 21:53:49 +00001749 sector_num = 0; // total number of sectors converted so far
Peter Lieven802c3d42013-12-05 15:54:53 +01001750 sectors_read = 0;
1751 sector_num_next_status = 0;
Jes Sorensen6b837bc2011-03-30 14:16:25 +02001752
bellardea2384d2004-08-01 21:59:26 +00001753 for(;;) {
1754 nb_sectors = total_sectors - sector_num;
Jes Sorensenb8fb60d2010-12-06 15:25:39 +01001755 if (nb_sectors <= 0) {
Peter Lieven802c3d42013-12-05 15:54:53 +01001756 if (count_allocated_sectors) {
1757 sectors_to_read = sectors_read;
1758 count_allocated_sectors = false;
1759 goto restart;
1760 }
Peter Lieven13c28af2013-11-27 11:07:01 +01001761 ret = 0;
bellardea2384d2004-08-01 21:59:26 +00001762 break;
Jes Sorensenb8fb60d2010-12-06 15:25:39 +01001763 }
balrog926c2d22007-10-31 01:11:44 +00001764
Markus Armbrusterd739f1c2014-06-26 13:23:24 +02001765 while (sector_num - bs_offset >= bs_sectors[bs_i]) {
1766 bs_offset += bs_sectors[bs_i];
balrog926c2d22007-10-31 01:11:44 +00001767 bs_i ++;
1768 assert (bs_i < bs_n);
Blue Swirl0bfcd592010-05-22 08:02:12 +00001769 /* printf("changing part: sector_num=%" PRId64 ", bs_i=%d, "
1770 "bs_offset=%" PRId64 ", bs_sectors=%" PRId64 "\n",
Markus Armbrusterd739f1c2014-06-26 13:23:24 +02001771 sector_num, bs_i, bs_offset, bs_sectors[bs_i]); */
balrog926c2d22007-10-31 01:11:44 +00001772 }
1773
Peter Lieven13c28af2013-11-27 11:07:01 +01001774 if ((out_baseimg || has_zero_init) &&
1775 sector_num >= sector_num_next_status) {
1776 n = nb_sectors > INT_MAX ? INT_MAX : nb_sectors;
1777 ret = bdrv_get_block_status(bs[bs_i], sector_num - bs_offset,
1778 n, &n1);
Paolo Bonzinie4a86f82013-09-04 19:00:26 +02001779 if (ret < 0) {
Peter Lieven13c28af2013-11-27 11:07:01 +01001780 error_report("error while reading block status of sector %"
1781 PRId64 ": %s", sector_num - bs_offset,
1782 strerror(-ret));
Paolo Bonzinie4a86f82013-09-04 19:00:26 +02001783 goto out;
aliguori93c65b42009-04-05 17:40:43 +00001784 }
Peter Lieven13c28af2013-11-27 11:07:01 +01001785 /* If the output image is zero initialized, we are not working
1786 * on a shared base and the input is zero we can skip the next
1787 * n1 sectors */
1788 if (has_zero_init && !out_baseimg && (ret & BDRV_BLOCK_ZERO)) {
Paolo Bonzinie4a86f82013-09-04 19:00:26 +02001789 sector_num += n1;
1790 continue;
1791 }
Peter Lieven13c28af2013-11-27 11:07:01 +01001792 /* If the output image is being created as a copy on write
1793 * image, assume that sectors which are unallocated in the
1794 * input image are present in both the output's and input's
1795 * base images (no need to copy them). */
1796 if (out_baseimg) {
1797 if (!(ret & BDRV_BLOCK_DATA)) {
1798 sector_num += n1;
1799 continue;
1800 }
1801 /* The next 'n1' sectors are allocated in the input image.
1802 * Copy only those as they may be followed by unallocated
1803 * sectors. */
1804 nb_sectors = n1;
1805 }
1806 /* avoid redundant callouts to get_block_status */
1807 sector_num_next_status = sector_num + n1;
thsf58c7b32008-06-05 21:53:49 +00001808 }
1809
Peter Lievenf2521c92013-11-27 11:07:06 +01001810 n = MIN(nb_sectors, bufsectors);
Peter Lieven24f833c2013-11-27 11:07:07 +01001811
1812 /* round down request length to an aligned sector, but
1813 * do not bother doing this on short requests. They happen
1814 * when we found an all-zero area, and the next sector to
1815 * write will not be sector_num + n. */
1816 if (cluster_sectors > 0 && n >= cluster_sectors) {
1817 int64_t next_aligned_sector = (sector_num + n);
1818 next_aligned_sector -= next_aligned_sector % cluster_sectors;
1819 if (sector_num + n > next_aligned_sector) {
1820 n = next_aligned_sector - sector_num;
1821 }
1822 }
1823
Markus Armbrusterd739f1c2014-06-26 13:23:24 +02001824 n = MIN(n, bs_sectors[bs_i] - (sector_num - bs_offset));
Peter Lieven13c28af2013-11-27 11:07:01 +01001825
Peter Lieven802c3d42013-12-05 15:54:53 +01001826 sectors_read += n;
1827 if (count_allocated_sectors) {
1828 sector_num += n;
1829 continue;
1830 }
1831
1832 n1 = n;
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09001833 ret = bdrv_read(bs[bs_i], sector_num - bs_offset, buf, n);
1834 if (ret < 0) {
Stefan Hajnoczi3fba9d82011-08-17 17:41:09 +01001835 error_report("error while reading sector %" PRId64 ": %s",
1836 sector_num - bs_offset, strerror(-ret));
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09001837 goto out;
1838 }
bellardea2384d2004-08-01 21:59:26 +00001839 /* NOTE: at the same time we convert, we do not write zero
1840 sectors to have a chance to compress the image. Ideally, we
1841 should add a specific call to have the info to go faster */
1842 buf1 = buf;
1843 while (n > 0) {
Paolo Bonzini11212d82013-09-04 19:00:27 +02001844 if (!has_zero_init ||
Kevin Wolfa22f1232011-08-26 15:27:13 +02001845 is_allocated_sectors_min(buf1, n, &n1, min_sparse)) {
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09001846 ret = bdrv_write(out_bs, sector_num, buf1, n1);
1847 if (ret < 0) {
Stefan Hajnoczi3fba9d82011-08-17 17:41:09 +01001848 error_report("error while writing sector %" PRId64
1849 ": %s", sector_num, strerror(-ret));
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09001850 goto out;
1851 }
bellardea2384d2004-08-01 21:59:26 +00001852 }
1853 sector_num += n1;
1854 n -= n1;
1855 buf1 += n1 * 512;
1856 }
Peter Lieven802c3d42013-12-05 15:54:53 +01001857 qemu_progress_print(100.0 * sectors_read / sectors_to_read, 0);
bellardea2384d2004-08-01 21:59:26 +00001858 }
1859 }
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09001860out:
Peter Lieven13c28af2013-11-27 11:07:01 +01001861 if (!ret) {
1862 qemu_progress_print(100, 0);
1863 }
Jes Sorensen6b837bc2011-03-30 14:16:25 +02001864 qemu_progress_end();
Chunyan Liu83d05212014-06-05 17:20:51 +08001865 qemu_opts_del(opts);
1866 qemu_opts_free(create_opts);
Kevin Wolfbb1c0592011-08-08 14:09:12 +02001867 qemu_vfree(buf);
Markus Armbrusterfbf28a42014-09-29 16:07:55 +02001868 qemu_opts_del(sn_opts);
Markus Armbruster26f54e92014-10-07 13:59:04 +02001869 blk_unref(out_blk);
Markus Armbruster9ba10c92014-10-07 13:59:08 +02001870 g_free(bs);
Markus Armbruster26f54e92014-10-07 13:59:04 +02001871 if (blk) {
1872 for (bs_i = 0; bs_i < bs_n; bs_i++) {
1873 blk_unref(blk[bs_i]);
1874 }
1875 g_free(blk);
1876 }
Markus Armbrusterd739f1c2014-06-26 13:23:24 +02001877 g_free(bs_sectors);
Kevin Wolf64bb01a2014-03-03 14:54:07 +01001878fail_getopt:
1879 g_free(options);
1880
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09001881 if (ret) {
1882 return 1;
1883 }
bellardea2384d2004-08-01 21:59:26 +00001884 return 0;
1885}
1886
bellard57d1a2b2004-08-03 21:15:11 +00001887
bellardfaea38e2006-08-05 21:31:00 +00001888static void dump_snapshots(BlockDriverState *bs)
1889{
1890 QEMUSnapshotInfo *sn_tab, *sn;
1891 int nb_sns, i;
bellardfaea38e2006-08-05 21:31:00 +00001892
1893 nb_sns = bdrv_snapshot_list(bs, &sn_tab);
1894 if (nb_sns <= 0)
1895 return;
1896 printf("Snapshot list:\n");
Wenchao Xia5b917042013-05-25 11:09:45 +08001897 bdrv_snapshot_dump(fprintf, stdout, NULL);
1898 printf("\n");
bellardfaea38e2006-08-05 21:31:00 +00001899 for(i = 0; i < nb_sns; i++) {
1900 sn = &sn_tab[i];
Wenchao Xia5b917042013-05-25 11:09:45 +08001901 bdrv_snapshot_dump(fprintf, stdout, sn);
1902 printf("\n");
bellardfaea38e2006-08-05 21:31:00 +00001903 }
Anthony Liguori7267c092011-08-20 22:09:37 -05001904 g_free(sn_tab);
bellardfaea38e2006-08-05 21:31:00 +00001905}
1906
Stefan Hajnoczi9699bf02012-10-17 14:02:31 +02001907static void dump_json_image_info_list(ImageInfoList *list)
1908{
Markus Armbruster4399c432014-04-25 16:50:32 +02001909 Error *local_err = NULL;
Stefan Hajnoczi9699bf02012-10-17 14:02:31 +02001910 QString *str;
1911 QmpOutputVisitor *ov = qmp_output_visitor_new();
1912 QObject *obj;
1913 visit_type_ImageInfoList(qmp_output_get_visitor(ov),
Markus Armbruster4399c432014-04-25 16:50:32 +02001914 &list, NULL, &local_err);
Stefan Hajnoczi9699bf02012-10-17 14:02:31 +02001915 obj = qmp_output_get_qobject(ov);
1916 str = qobject_to_json_pretty(obj);
1917 assert(str != NULL);
1918 printf("%s\n", qstring_get_str(str));
1919 qobject_decref(obj);
1920 qmp_output_visitor_cleanup(ov);
1921 QDECREF(str);
1922}
1923
Benoît Canetc054b3f2012-09-05 13:09:02 +02001924static void dump_json_image_info(ImageInfo *info)
1925{
Markus Armbruster4399c432014-04-25 16:50:32 +02001926 Error *local_err = NULL;
Benoît Canetc054b3f2012-09-05 13:09:02 +02001927 QString *str;
1928 QmpOutputVisitor *ov = qmp_output_visitor_new();
1929 QObject *obj;
1930 visit_type_ImageInfo(qmp_output_get_visitor(ov),
Markus Armbruster4399c432014-04-25 16:50:32 +02001931 &info, NULL, &local_err);
Benoît Canetc054b3f2012-09-05 13:09:02 +02001932 obj = qmp_output_get_qobject(ov);
1933 str = qobject_to_json_pretty(obj);
1934 assert(str != NULL);
1935 printf("%s\n", qstring_get_str(str));
1936 qobject_decref(obj);
1937 qmp_output_visitor_cleanup(ov);
1938 QDECREF(str);
1939}
1940
Stefan Hajnoczi9699bf02012-10-17 14:02:31 +02001941static void dump_human_image_info_list(ImageInfoList *list)
1942{
1943 ImageInfoList *elem;
1944 bool delim = false;
1945
1946 for (elem = list; elem; elem = elem->next) {
1947 if (delim) {
1948 printf("\n");
1949 }
1950 delim = true;
1951
Wenchao Xia5b917042013-05-25 11:09:45 +08001952 bdrv_image_info_dump(fprintf, stdout, elem->value);
Stefan Hajnoczi9699bf02012-10-17 14:02:31 +02001953 }
1954}
1955
1956static gboolean str_equal_func(gconstpointer a, gconstpointer b)
1957{
1958 return strcmp(a, b) == 0;
1959}
1960
1961/**
1962 * Open an image file chain and return an ImageInfoList
1963 *
1964 * @filename: topmost image filename
1965 * @fmt: topmost image format (may be NULL to autodetect)
1966 * @chain: true - enumerate entire backing file chain
1967 * false - only topmost image file
1968 *
1969 * Returns a list of ImageInfo objects or NULL if there was an error opening an
1970 * image file. If there was an error a message will have been printed to
1971 * stderr.
1972 */
1973static ImageInfoList *collect_image_info_list(const char *filename,
1974 const char *fmt,
1975 bool chain)
1976{
1977 ImageInfoList *head = NULL;
1978 ImageInfoList **last = &head;
1979 GHashTable *filenames;
Wenchao Xia43526ec2013-06-06 12:27:58 +08001980 Error *err = NULL;
Stefan Hajnoczi9699bf02012-10-17 14:02:31 +02001981
1982 filenames = g_hash_table_new_full(g_str_hash, str_equal_func, NULL, NULL);
1983
1984 while (filename) {
Markus Armbruster26f54e92014-10-07 13:59:04 +02001985 BlockBackend *blk;
Stefan Hajnoczi9699bf02012-10-17 14:02:31 +02001986 BlockDriverState *bs;
1987 ImageInfo *info;
1988 ImageInfoList *elem;
1989
1990 if (g_hash_table_lookup_extended(filenames, filename, NULL, NULL)) {
1991 error_report("Backing file '%s' creates an infinite loop.",
1992 filename);
1993 goto err;
1994 }
1995 g_hash_table_insert(filenames, (gpointer)filename, NULL);
1996
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02001997 blk = img_open("image", filename, fmt,
1998 BDRV_O_FLAGS | BDRV_O_NO_BACKING, false, false);
1999 if (!blk) {
Stefan Hajnoczi9699bf02012-10-17 14:02:31 +02002000 goto err;
2001 }
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02002002 bs = blk_bs(blk);
Stefan Hajnoczi9699bf02012-10-17 14:02:31 +02002003
Wenchao Xia43526ec2013-06-06 12:27:58 +08002004 bdrv_query_image_info(bs, &info, &err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01002005 if (err) {
Markus Armbruster565f65d2015-02-12 13:55:05 +01002006 error_report_err(err);
Markus Armbruster26f54e92014-10-07 13:59:04 +02002007 blk_unref(blk);
Wenchao Xia43526ec2013-06-06 12:27:58 +08002008 goto err;
Wenchao Xiafb0ed452013-06-06 12:27:57 +08002009 }
Stefan Hajnoczi9699bf02012-10-17 14:02:31 +02002010
2011 elem = g_new0(ImageInfoList, 1);
2012 elem->value = info;
2013 *last = elem;
2014 last = &elem->next;
2015
Markus Armbruster26f54e92014-10-07 13:59:04 +02002016 blk_unref(blk);
Stefan Hajnoczi9699bf02012-10-17 14:02:31 +02002017
2018 filename = fmt = NULL;
2019 if (chain) {
2020 if (info->has_full_backing_filename) {
2021 filename = info->full_backing_filename;
2022 } else if (info->has_backing_filename) {
2023 filename = info->backing_filename;
2024 }
2025 if (info->has_backing_filename_format) {
2026 fmt = info->backing_filename_format;
2027 }
2028 }
2029 }
2030 g_hash_table_destroy(filenames);
2031 return head;
2032
2033err:
2034 qapi_free_ImageInfoList(head);
2035 g_hash_table_destroy(filenames);
2036 return NULL;
2037}
2038
Benoît Canetc054b3f2012-09-05 13:09:02 +02002039static int img_info(int argc, char **argv)
2040{
2041 int c;
2042 OutputFormat output_format = OFORMAT_HUMAN;
Stefan Hajnoczi9699bf02012-10-17 14:02:31 +02002043 bool chain = false;
Benoît Canetc054b3f2012-09-05 13:09:02 +02002044 const char *filename, *fmt, *output;
Stefan Hajnoczi9699bf02012-10-17 14:02:31 +02002045 ImageInfoList *list;
Benoît Canetc054b3f2012-09-05 13:09:02 +02002046
bellardea2384d2004-08-01 21:59:26 +00002047 fmt = NULL;
Benoît Canetc054b3f2012-09-05 13:09:02 +02002048 output = NULL;
bellardea2384d2004-08-01 21:59:26 +00002049 for(;;) {
Benoît Canetc054b3f2012-09-05 13:09:02 +02002050 int option_index = 0;
2051 static const struct option long_options[] = {
2052 {"help", no_argument, 0, 'h'},
2053 {"format", required_argument, 0, 'f'},
2054 {"output", required_argument, 0, OPTION_OUTPUT},
Stefan Hajnoczi9699bf02012-10-17 14:02:31 +02002055 {"backing-chain", no_argument, 0, OPTION_BACKING_CHAIN},
Benoît Canetc054b3f2012-09-05 13:09:02 +02002056 {0, 0, 0, 0}
2057 };
2058 c = getopt_long(argc, argv, "f:h",
2059 long_options, &option_index);
Jes Sorensenb8fb60d2010-12-06 15:25:39 +01002060 if (c == -1) {
bellardea2384d2004-08-01 21:59:26 +00002061 break;
Jes Sorensenb8fb60d2010-12-06 15:25:39 +01002062 }
bellardea2384d2004-08-01 21:59:26 +00002063 switch(c) {
Jes Sorensenef873942010-12-06 15:25:40 +01002064 case '?':
bellardea2384d2004-08-01 21:59:26 +00002065 case 'h':
2066 help();
2067 break;
2068 case 'f':
2069 fmt = optarg;
2070 break;
Benoît Canetc054b3f2012-09-05 13:09:02 +02002071 case OPTION_OUTPUT:
2072 output = optarg;
2073 break;
Stefan Hajnoczi9699bf02012-10-17 14:02:31 +02002074 case OPTION_BACKING_CHAIN:
2075 chain = true;
2076 break;
bellardea2384d2004-08-01 21:59:26 +00002077 }
2078 }
Kevin Wolffc11eb22013-08-05 10:53:04 +02002079 if (optind != argc - 1) {
Fam Zhengac1307a2014-04-22 13:36:11 +08002080 error_exit("Expecting one image file name");
Jes Sorensenb8fb60d2010-12-06 15:25:39 +01002081 }
bellardea2384d2004-08-01 21:59:26 +00002082 filename = argv[optind++];
2083
Benoît Canetc054b3f2012-09-05 13:09:02 +02002084 if (output && !strcmp(output, "json")) {
2085 output_format = OFORMAT_JSON;
2086 } else if (output && !strcmp(output, "human")) {
2087 output_format = OFORMAT_HUMAN;
2088 } else if (output) {
2089 error_report("--output must be used with human or json as argument.");
2090 return 1;
2091 }
2092
Stefan Hajnoczi9699bf02012-10-17 14:02:31 +02002093 list = collect_image_info_list(filename, fmt, chain);
2094 if (!list) {
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09002095 return 1;
2096 }
Benoît Canetc054b3f2012-09-05 13:09:02 +02002097
Benoît Canetc054b3f2012-09-05 13:09:02 +02002098 switch (output_format) {
2099 case OFORMAT_HUMAN:
Stefan Hajnoczi9699bf02012-10-17 14:02:31 +02002100 dump_human_image_info_list(list);
Benoît Canetc054b3f2012-09-05 13:09:02 +02002101 break;
2102 case OFORMAT_JSON:
Stefan Hajnoczi9699bf02012-10-17 14:02:31 +02002103 if (chain) {
2104 dump_json_image_info_list(list);
2105 } else {
2106 dump_json_image_info(list->value);
2107 }
Benoît Canetc054b3f2012-09-05 13:09:02 +02002108 break;
Jes Sorensenb8fb60d2010-12-06 15:25:39 +01002109 }
Benoît Canetc054b3f2012-09-05 13:09:02 +02002110
Stefan Hajnoczi9699bf02012-10-17 14:02:31 +02002111 qapi_free_ImageInfoList(list);
bellardea2384d2004-08-01 21:59:26 +00002112 return 0;
2113}
2114
Paolo Bonzini4c93a13b2013-09-04 19:00:33 +02002115
2116typedef struct MapEntry {
2117 int flags;
2118 int depth;
2119 int64_t start;
2120 int64_t length;
2121 int64_t offset;
2122 BlockDriverState *bs;
2123} MapEntry;
2124
2125static void dump_map_entry(OutputFormat output_format, MapEntry *e,
2126 MapEntry *next)
2127{
2128 switch (output_format) {
2129 case OFORMAT_HUMAN:
2130 if ((e->flags & BDRV_BLOCK_DATA) &&
2131 !(e->flags & BDRV_BLOCK_OFFSET_VALID)) {
2132 error_report("File contains external, encrypted or compressed clusters.");
2133 exit(1);
2134 }
2135 if ((e->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) == BDRV_BLOCK_DATA) {
2136 printf("%#-16"PRIx64"%#-16"PRIx64"%#-16"PRIx64"%s\n",
2137 e->start, e->length, e->offset, e->bs->filename);
2138 }
2139 /* This format ignores the distinction between 0, ZERO and ZERO|DATA.
2140 * Modify the flags here to allow more coalescing.
2141 */
2142 if (next &&
2143 (next->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) != BDRV_BLOCK_DATA) {
2144 next->flags &= ~BDRV_BLOCK_DATA;
2145 next->flags |= BDRV_BLOCK_ZERO;
2146 }
2147 break;
2148 case OFORMAT_JSON:
2149 printf("%s{ \"start\": %"PRId64", \"length\": %"PRId64", \"depth\": %d,"
2150 " \"zero\": %s, \"data\": %s",
2151 (e->start == 0 ? "[" : ",\n"),
2152 e->start, e->length, e->depth,
2153 (e->flags & BDRV_BLOCK_ZERO) ? "true" : "false",
2154 (e->flags & BDRV_BLOCK_DATA) ? "true" : "false");
2155 if (e->flags & BDRV_BLOCK_OFFSET_VALID) {
Paolo Bonzinic745bfb2013-09-11 18:47:52 +02002156 printf(", \"offset\": %"PRId64"", e->offset);
Paolo Bonzini4c93a13b2013-09-04 19:00:33 +02002157 }
2158 putchar('}');
2159
2160 if (!next) {
2161 printf("]\n");
2162 }
2163 break;
2164 }
2165}
2166
2167static int get_block_status(BlockDriverState *bs, int64_t sector_num,
2168 int nb_sectors, MapEntry *e)
2169{
2170 int64_t ret;
2171 int depth;
2172
2173 /* As an optimization, we could cache the current range of unallocated
2174 * clusters in each file of the chain, and avoid querying the same
2175 * range repeatedly.
2176 */
2177
2178 depth = 0;
2179 for (;;) {
2180 ret = bdrv_get_block_status(bs, sector_num, nb_sectors, &nb_sectors);
2181 if (ret < 0) {
2182 return ret;
2183 }
2184 assert(nb_sectors);
2185 if (ret & (BDRV_BLOCK_ZERO|BDRV_BLOCK_DATA)) {
2186 break;
2187 }
2188 bs = bs->backing_hd;
2189 if (bs == NULL) {
2190 ret = 0;
2191 break;
2192 }
2193
2194 depth++;
2195 }
2196
2197 e->start = sector_num * BDRV_SECTOR_SIZE;
2198 e->length = nb_sectors * BDRV_SECTOR_SIZE;
2199 e->flags = ret & ~BDRV_BLOCK_OFFSET_MASK;
2200 e->offset = ret & BDRV_BLOCK_OFFSET_MASK;
2201 e->depth = depth;
2202 e->bs = bs;
2203 return 0;
2204}
2205
2206static int img_map(int argc, char **argv)
2207{
2208 int c;
2209 OutputFormat output_format = OFORMAT_HUMAN;
Markus Armbruster26f54e92014-10-07 13:59:04 +02002210 BlockBackend *blk;
Paolo Bonzini4c93a13b2013-09-04 19:00:33 +02002211 BlockDriverState *bs;
2212 const char *filename, *fmt, *output;
2213 int64_t length;
2214 MapEntry curr = { .length = 0 }, next;
2215 int ret = 0;
2216
2217 fmt = NULL;
2218 output = NULL;
2219 for (;;) {
2220 int option_index = 0;
2221 static const struct option long_options[] = {
2222 {"help", no_argument, 0, 'h'},
2223 {"format", required_argument, 0, 'f'},
2224 {"output", required_argument, 0, OPTION_OUTPUT},
2225 {0, 0, 0, 0}
2226 };
2227 c = getopt_long(argc, argv, "f:h",
2228 long_options, &option_index);
2229 if (c == -1) {
2230 break;
2231 }
2232 switch (c) {
2233 case '?':
2234 case 'h':
2235 help();
2236 break;
2237 case 'f':
2238 fmt = optarg;
2239 break;
2240 case OPTION_OUTPUT:
2241 output = optarg;
2242 break;
2243 }
2244 }
Fam Zhengac1307a2014-04-22 13:36:11 +08002245 if (optind != argc - 1) {
2246 error_exit("Expecting one image file name");
Paolo Bonzini4c93a13b2013-09-04 19:00:33 +02002247 }
Fam Zhengac1307a2014-04-22 13:36:11 +08002248 filename = argv[optind];
Paolo Bonzini4c93a13b2013-09-04 19:00:33 +02002249
2250 if (output && !strcmp(output, "json")) {
2251 output_format = OFORMAT_JSON;
2252 } else if (output && !strcmp(output, "human")) {
2253 output_format = OFORMAT_HUMAN;
2254 } else if (output) {
2255 error_report("--output must be used with human or json as argument.");
2256 return 1;
2257 }
2258
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02002259 blk = img_open("image", filename, fmt, BDRV_O_FLAGS, true, false);
2260 if (!blk) {
2261 return 1;
Paolo Bonzini4c93a13b2013-09-04 19:00:33 +02002262 }
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02002263 bs = blk_bs(blk);
Paolo Bonzini4c93a13b2013-09-04 19:00:33 +02002264
2265 if (output_format == OFORMAT_HUMAN) {
2266 printf("%-16s%-16s%-16s%s\n", "Offset", "Length", "Mapped to", "File");
2267 }
2268
2269 length = bdrv_getlength(bs);
2270 while (curr.start + curr.length < length) {
2271 int64_t nsectors_left;
2272 int64_t sector_num;
2273 int n;
2274
2275 sector_num = (curr.start + curr.length) >> BDRV_SECTOR_BITS;
2276
2277 /* Probe up to 1 GiB at a time. */
2278 nsectors_left = DIV_ROUND_UP(length, BDRV_SECTOR_SIZE) - sector_num;
2279 n = MIN(1 << (30 - BDRV_SECTOR_BITS), nsectors_left);
2280 ret = get_block_status(bs, sector_num, n, &next);
2281
2282 if (ret < 0) {
2283 error_report("Could not read file metadata: %s", strerror(-ret));
2284 goto out;
2285 }
2286
2287 if (curr.length != 0 && curr.flags == next.flags &&
2288 curr.depth == next.depth &&
2289 ((curr.flags & BDRV_BLOCK_OFFSET_VALID) == 0 ||
2290 curr.offset + curr.length == next.offset)) {
2291 curr.length += next.length;
2292 continue;
2293 }
2294
2295 if (curr.length > 0) {
2296 dump_map_entry(output_format, &curr, &next);
2297 }
2298 curr = next;
2299 }
2300
2301 dump_map_entry(output_format, &curr, NULL);
2302
2303out:
Markus Armbruster26f54e92014-10-07 13:59:04 +02002304 blk_unref(blk);
Paolo Bonzini4c93a13b2013-09-04 19:00:33 +02002305 return ret < 0;
2306}
2307
aliguorif7b4a942009-01-07 17:40:15 +00002308#define SNAPSHOT_LIST 1
2309#define SNAPSHOT_CREATE 2
2310#define SNAPSHOT_APPLY 3
2311#define SNAPSHOT_DELETE 4
2312
Stuart Brady153859b2009-06-07 00:42:17 +01002313static int img_snapshot(int argc, char **argv)
aliguorif7b4a942009-01-07 17:40:15 +00002314{
Markus Armbruster26f54e92014-10-07 13:59:04 +02002315 BlockBackend *blk;
aliguorif7b4a942009-01-07 17:40:15 +00002316 BlockDriverState *bs;
2317 QEMUSnapshotInfo sn;
2318 char *filename, *snapshot_name = NULL;
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09002319 int c, ret = 0, bdrv_oflags;
aliguorif7b4a942009-01-07 17:40:15 +00002320 int action = 0;
2321 qemu_timeval tv;
Miroslav Rezaninaf382d432013-02-13 09:09:40 +01002322 bool quiet = false;
Wenchao Xiaa89d89d2013-09-11 14:04:33 +08002323 Error *err = NULL;
aliguorif7b4a942009-01-07 17:40:15 +00002324
Kevin Wolf710da702011-01-10 12:33:02 +01002325 bdrv_oflags = BDRV_O_FLAGS | BDRV_O_RDWR;
aliguorif7b4a942009-01-07 17:40:15 +00002326 /* Parse commandline parameters */
2327 for(;;) {
Miroslav Rezaninaf382d432013-02-13 09:09:40 +01002328 c = getopt(argc, argv, "la:c:d:hq");
Jes Sorensenb8fb60d2010-12-06 15:25:39 +01002329 if (c == -1) {
aliguorif7b4a942009-01-07 17:40:15 +00002330 break;
Jes Sorensenb8fb60d2010-12-06 15:25:39 +01002331 }
aliguorif7b4a942009-01-07 17:40:15 +00002332 switch(c) {
Jes Sorensenef873942010-12-06 15:25:40 +01002333 case '?':
aliguorif7b4a942009-01-07 17:40:15 +00002334 case 'h':
2335 help();
Stuart Brady153859b2009-06-07 00:42:17 +01002336 return 0;
aliguorif7b4a942009-01-07 17:40:15 +00002337 case 'l':
2338 if (action) {
Fam Zhengac1307a2014-04-22 13:36:11 +08002339 error_exit("Cannot mix '-l', '-a', '-c', '-d'");
Stuart Brady153859b2009-06-07 00:42:17 +01002340 return 0;
aliguorif7b4a942009-01-07 17:40:15 +00002341 }
2342 action = SNAPSHOT_LIST;
Naphtali Spreif5edb012010-01-17 16:48:13 +02002343 bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */
aliguorif7b4a942009-01-07 17:40:15 +00002344 break;
2345 case 'a':
2346 if (action) {
Fam Zhengac1307a2014-04-22 13:36:11 +08002347 error_exit("Cannot mix '-l', '-a', '-c', '-d'");
Stuart Brady153859b2009-06-07 00:42:17 +01002348 return 0;
aliguorif7b4a942009-01-07 17:40:15 +00002349 }
2350 action = SNAPSHOT_APPLY;
2351 snapshot_name = optarg;
2352 break;
2353 case 'c':
2354 if (action) {
Fam Zhengac1307a2014-04-22 13:36:11 +08002355 error_exit("Cannot mix '-l', '-a', '-c', '-d'");
Stuart Brady153859b2009-06-07 00:42:17 +01002356 return 0;
aliguorif7b4a942009-01-07 17:40:15 +00002357 }
2358 action = SNAPSHOT_CREATE;
2359 snapshot_name = optarg;
2360 break;
2361 case 'd':
2362 if (action) {
Fam Zhengac1307a2014-04-22 13:36:11 +08002363 error_exit("Cannot mix '-l', '-a', '-c', '-d'");
Stuart Brady153859b2009-06-07 00:42:17 +01002364 return 0;
aliguorif7b4a942009-01-07 17:40:15 +00002365 }
2366 action = SNAPSHOT_DELETE;
2367 snapshot_name = optarg;
2368 break;
Miroslav Rezaninaf382d432013-02-13 09:09:40 +01002369 case 'q':
2370 quiet = true;
2371 break;
aliguorif7b4a942009-01-07 17:40:15 +00002372 }
2373 }
2374
Kevin Wolffc11eb22013-08-05 10:53:04 +02002375 if (optind != argc - 1) {
Fam Zhengac1307a2014-04-22 13:36:11 +08002376 error_exit("Expecting one image file name");
Jes Sorensenb8fb60d2010-12-06 15:25:39 +01002377 }
aliguorif7b4a942009-01-07 17:40:15 +00002378 filename = argv[optind++];
2379
2380 /* Open the image */
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02002381 blk = img_open("image", filename, NULL, bdrv_oflags, true, quiet);
2382 if (!blk) {
2383 return 1;
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09002384 }
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02002385 bs = blk_bs(blk);
aliguorif7b4a942009-01-07 17:40:15 +00002386
2387 /* Perform the requested action */
2388 switch(action) {
2389 case SNAPSHOT_LIST:
2390 dump_snapshots(bs);
2391 break;
2392
2393 case SNAPSHOT_CREATE:
2394 memset(&sn, 0, sizeof(sn));
2395 pstrcpy(sn.name, sizeof(sn.name), snapshot_name);
2396
2397 qemu_gettimeofday(&tv);
2398 sn.date_sec = tv.tv_sec;
2399 sn.date_nsec = tv.tv_usec * 1000;
2400
2401 ret = bdrv_snapshot_create(bs, &sn);
Jes Sorensenb8fb60d2010-12-06 15:25:39 +01002402 if (ret) {
Jes Sorensen15654a62010-12-16 14:31:53 +01002403 error_report("Could not create snapshot '%s': %d (%s)",
aliguorif7b4a942009-01-07 17:40:15 +00002404 snapshot_name, ret, strerror(-ret));
Jes Sorensenb8fb60d2010-12-06 15:25:39 +01002405 }
aliguorif7b4a942009-01-07 17:40:15 +00002406 break;
2407
2408 case SNAPSHOT_APPLY:
2409 ret = bdrv_snapshot_goto(bs, snapshot_name);
Jes Sorensenb8fb60d2010-12-06 15:25:39 +01002410 if (ret) {
Jes Sorensen15654a62010-12-16 14:31:53 +01002411 error_report("Could not apply snapshot '%s': %d (%s)",
aliguorif7b4a942009-01-07 17:40:15 +00002412 snapshot_name, ret, strerror(-ret));
Jes Sorensenb8fb60d2010-12-06 15:25:39 +01002413 }
aliguorif7b4a942009-01-07 17:40:15 +00002414 break;
2415
2416 case SNAPSHOT_DELETE:
Wenchao Xiaa89d89d2013-09-11 14:04:33 +08002417 bdrv_snapshot_delete_by_id_or_name(bs, snapshot_name, &err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01002418 if (err) {
Wenchao Xiaa89d89d2013-09-11 14:04:33 +08002419 error_report("Could not delete snapshot '%s': (%s)",
2420 snapshot_name, error_get_pretty(err));
2421 error_free(err);
2422 ret = 1;
Jes Sorensenb8fb60d2010-12-06 15:25:39 +01002423 }
aliguorif7b4a942009-01-07 17:40:15 +00002424 break;
2425 }
2426
2427 /* Cleanup */
Markus Armbruster26f54e92014-10-07 13:59:04 +02002428 blk_unref(blk);
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09002429 if (ret) {
2430 return 1;
2431 }
Stuart Brady153859b2009-06-07 00:42:17 +01002432 return 0;
aliguorif7b4a942009-01-07 17:40:15 +00002433}
2434
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002435static int img_rebase(int argc, char **argv)
2436{
Markus Armbruster26f54e92014-10-07 13:59:04 +02002437 BlockBackend *blk = NULL, *blk_old_backing = NULL, *blk_new_backing = NULL;
Stefan Hajnoczi40ed35a2014-08-26 19:17:56 +01002438 BlockDriverState *bs = NULL, *bs_old_backing = NULL, *bs_new_backing = NULL;
Stefan Hajnoczif163d072010-04-13 10:29:34 +01002439 BlockDriver *old_backing_drv, *new_backing_drv;
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002440 char *filename;
Max Reitz40055952014-07-22 22:58:42 +02002441 const char *fmt, *cache, *src_cache, *out_basefmt, *out_baseimg;
2442 int c, flags, src_flags, ret;
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002443 int unsafe = 0;
Jes Sorensen6b837bc2011-03-30 14:16:25 +02002444 int progress = 0;
Miroslav Rezaninaf382d432013-02-13 09:09:40 +01002445 bool quiet = false;
Max Reitz34b5d2c2013-09-05 14:45:29 +02002446 Error *local_err = NULL;
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002447
2448 /* Parse commandline parameters */
Kevin Wolfe53dbee2010-03-02 12:14:31 +01002449 fmt = NULL;
Federico Simoncelli661a0f72011-06-20 12:48:19 -04002450 cache = BDRV_DEFAULT_CACHE;
Max Reitz40055952014-07-22 22:58:42 +02002451 src_cache = BDRV_DEFAULT_CACHE;
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002452 out_baseimg = NULL;
2453 out_basefmt = NULL;
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002454 for(;;) {
Max Reitz40055952014-07-22 22:58:42 +02002455 c = getopt(argc, argv, "hf:F:b:upt:T:q");
Jes Sorensenb8fb60d2010-12-06 15:25:39 +01002456 if (c == -1) {
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002457 break;
Jes Sorensenb8fb60d2010-12-06 15:25:39 +01002458 }
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002459 switch(c) {
Jes Sorensenef873942010-12-06 15:25:40 +01002460 case '?':
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002461 case 'h':
2462 help();
2463 return 0;
Kevin Wolfe53dbee2010-03-02 12:14:31 +01002464 case 'f':
2465 fmt = optarg;
2466 break;
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002467 case 'F':
2468 out_basefmt = optarg;
2469 break;
2470 case 'b':
2471 out_baseimg = optarg;
2472 break;
2473 case 'u':
2474 unsafe = 1;
2475 break;
Jes Sorensen6b837bc2011-03-30 14:16:25 +02002476 case 'p':
2477 progress = 1;
2478 break;
Federico Simoncelli661a0f72011-06-20 12:48:19 -04002479 case 't':
2480 cache = optarg;
2481 break;
Max Reitz40055952014-07-22 22:58:42 +02002482 case 'T':
2483 src_cache = optarg;
2484 break;
Miroslav Rezaninaf382d432013-02-13 09:09:40 +01002485 case 'q':
2486 quiet = true;
2487 break;
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002488 }
2489 }
2490
Miroslav Rezaninaf382d432013-02-13 09:09:40 +01002491 if (quiet) {
2492 progress = 0;
2493 }
2494
Fam Zhengac1307a2014-04-22 13:36:11 +08002495 if (optind != argc - 1) {
2496 error_exit("Expecting one image file name");
2497 }
2498 if (!unsafe && !out_baseimg) {
2499 error_exit("Must specify backing file (-b) or use unsafe mode (-u)");
Jes Sorensenb8fb60d2010-12-06 15:25:39 +01002500 }
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002501 filename = argv[optind++];
2502
Jes Sorensen6b837bc2011-03-30 14:16:25 +02002503 qemu_progress_init(progress, 2.0);
2504 qemu_progress_print(0, 100);
2505
Federico Simoncelli661a0f72011-06-20 12:48:19 -04002506 flags = BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0);
Stefan Hajnoczic3993cd2011-08-04 12:26:51 +01002507 ret = bdrv_parse_cache_flags(cache, &flags);
Federico Simoncelli661a0f72011-06-20 12:48:19 -04002508 if (ret < 0) {
2509 error_report("Invalid cache option: %s", cache);
Stefan Hajnoczi40ed35a2014-08-26 19:17:56 +01002510 goto out;
Federico Simoncelli661a0f72011-06-20 12:48:19 -04002511 }
2512
Max Reitz40055952014-07-22 22:58:42 +02002513 src_flags = BDRV_O_FLAGS;
2514 ret = bdrv_parse_cache_flags(src_cache, &src_flags);
2515 if (ret < 0) {
2516 error_report("Invalid source cache option: %s", src_cache);
Stefan Hajnoczi40ed35a2014-08-26 19:17:56 +01002517 goto out;
Max Reitz40055952014-07-22 22:58:42 +02002518 }
2519
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002520 /*
2521 * Open the images.
2522 *
2523 * Ignore the old backing file for unsafe rebase in case we want to correct
2524 * the reference to a renamed or moved backing file.
2525 */
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02002526 blk = img_open("image", filename, fmt, flags, true, quiet);
2527 if (!blk) {
Stefan Hajnoczi40ed35a2014-08-26 19:17:56 +01002528 ret = -1;
2529 goto out;
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09002530 }
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02002531 bs = blk_bs(blk);
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002532
2533 /* Find the right drivers for the backing files */
2534 old_backing_drv = NULL;
2535 new_backing_drv = NULL;
2536
2537 if (!unsafe && bs->backing_format[0] != '\0') {
2538 old_backing_drv = bdrv_find_format(bs->backing_format);
2539 if (old_backing_drv == NULL) {
Jes Sorensen15654a62010-12-16 14:31:53 +01002540 error_report("Invalid format name: '%s'", bs->backing_format);
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09002541 ret = -1;
2542 goto out;
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002543 }
2544 }
2545
2546 if (out_basefmt != NULL) {
2547 new_backing_drv = bdrv_find_format(out_basefmt);
2548 if (new_backing_drv == NULL) {
Jes Sorensen15654a62010-12-16 14:31:53 +01002549 error_report("Invalid format name: '%s'", out_basefmt);
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09002550 ret = -1;
2551 goto out;
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002552 }
2553 }
2554
2555 /* For safe rebasing we need to compare old and new backing file */
Stefan Hajnoczi40ed35a2014-08-26 19:17:56 +01002556 if (!unsafe) {
Jeff Cody9a29e182015-01-22 08:03:30 -05002557 char backing_name[PATH_MAX];
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002558
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02002559 blk_old_backing = blk_new_with_bs("old_backing", &error_abort);
2560 bs_old_backing = blk_bs(blk_old_backing);
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002561 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name));
Max Reitz40055952014-07-22 22:58:42 +02002562 ret = bdrv_open(&bs_old_backing, backing_name, NULL, NULL, src_flags,
Max Reitz34b5d2c2013-09-05 14:45:29 +02002563 old_backing_drv, &local_err);
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09002564 if (ret) {
Max Reitz34b5d2c2013-09-05 14:45:29 +02002565 error_report("Could not open old backing file '%s': %s",
2566 backing_name, error_get_pretty(local_err));
2567 error_free(local_err);
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09002568 goto out;
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002569 }
Alex Bligha6166732012-10-16 13:46:18 +01002570 if (out_baseimg[0]) {
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02002571 blk_new_backing = blk_new_with_bs("new_backing", &error_abort);
2572 bs_new_backing = blk_bs(blk_new_backing);
Max Reitz40055952014-07-22 22:58:42 +02002573 ret = bdrv_open(&bs_new_backing, out_baseimg, NULL, NULL, src_flags,
2574 new_backing_drv, &local_err);
Alex Bligha6166732012-10-16 13:46:18 +01002575 if (ret) {
Max Reitz34b5d2c2013-09-05 14:45:29 +02002576 error_report("Could not open new backing file '%s': %s",
2577 out_baseimg, error_get_pretty(local_err));
2578 error_free(local_err);
Alex Bligha6166732012-10-16 13:46:18 +01002579 goto out;
2580 }
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002581 }
2582 }
2583
2584 /*
2585 * Check each unallocated cluster in the COW file. If it is unallocated,
2586 * accesses go to the backing file. We must therefore compare this cluster
2587 * in the old and new backing file, and if they differ we need to copy it
2588 * from the old backing file into the COW file.
2589 *
2590 * If qemu-img crashes during this step, no harm is done. The content of
2591 * the image is the same as the original one at any time.
2592 */
2593 if (!unsafe) {
Markus Armbruster52bf1e72014-06-26 13:23:25 +02002594 int64_t num_sectors;
2595 int64_t old_backing_num_sectors;
2596 int64_t new_backing_num_sectors = 0;
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002597 uint64_t sector;
Kevin Wolfcc60e322010-04-29 14:47:48 +02002598 int n;
TeLeMand6771bf2010-02-08 16:20:00 +08002599 uint8_t * buf_old;
2600 uint8_t * buf_new;
Kevin Wolf1f710492012-10-12 14:29:18 +02002601 float local_progress = 0;
TeLeMand6771bf2010-02-08 16:20:00 +08002602
Kevin Wolfbb1c0592011-08-08 14:09:12 +02002603 buf_old = qemu_blockalign(bs, IO_BUF_SIZE);
2604 buf_new = qemu_blockalign(bs, IO_BUF_SIZE);
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002605
Markus Armbruster52bf1e72014-06-26 13:23:25 +02002606 num_sectors = bdrv_nb_sectors(bs);
2607 if (num_sectors < 0) {
2608 error_report("Could not get size of '%s': %s",
2609 filename, strerror(-num_sectors));
2610 ret = -1;
2611 goto out;
2612 }
2613 old_backing_num_sectors = bdrv_nb_sectors(bs_old_backing);
2614 if (old_backing_num_sectors < 0) {
Jeff Cody9a29e182015-01-22 08:03:30 -05002615 char backing_name[PATH_MAX];
Markus Armbruster52bf1e72014-06-26 13:23:25 +02002616
2617 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name));
2618 error_report("Could not get size of '%s': %s",
2619 backing_name, strerror(-old_backing_num_sectors));
2620 ret = -1;
2621 goto out;
2622 }
Alex Bligha6166732012-10-16 13:46:18 +01002623 if (bs_new_backing) {
Markus Armbruster52bf1e72014-06-26 13:23:25 +02002624 new_backing_num_sectors = bdrv_nb_sectors(bs_new_backing);
2625 if (new_backing_num_sectors < 0) {
2626 error_report("Could not get size of '%s': %s",
2627 out_baseimg, strerror(-new_backing_num_sectors));
2628 ret = -1;
2629 goto out;
2630 }
Alex Bligha6166732012-10-16 13:46:18 +01002631 }
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002632
Kevin Wolf1f710492012-10-12 14:29:18 +02002633 if (num_sectors != 0) {
2634 local_progress = (float)100 /
2635 (num_sectors / MIN(num_sectors, IO_BUF_SIZE / 512));
2636 }
2637
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002638 for (sector = 0; sector < num_sectors; sector += n) {
2639
2640 /* How many sectors can we handle with the next read? */
2641 if (sector + (IO_BUF_SIZE / 512) <= num_sectors) {
2642 n = (IO_BUF_SIZE / 512);
2643 } else {
2644 n = num_sectors - sector;
2645 }
2646
2647 /* If the cluster is allocated, we don't need to take action */
Kevin Wolfcc60e322010-04-29 14:47:48 +02002648 ret = bdrv_is_allocated(bs, sector, n, &n);
Paolo Bonzinid6636402013-09-04 19:00:25 +02002649 if (ret < 0) {
2650 error_report("error while reading image metadata: %s",
2651 strerror(-ret));
2652 goto out;
2653 }
Kevin Wolfcc60e322010-04-29 14:47:48 +02002654 if (ret) {
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002655 continue;
2656 }
2657
Kevin Wolf87a1b3e2011-12-07 12:42:10 +01002658 /*
2659 * Read old and new backing file and take into consideration that
2660 * backing files may be smaller than the COW image.
2661 */
2662 if (sector >= old_backing_num_sectors) {
2663 memset(buf_old, 0, n * BDRV_SECTOR_SIZE);
2664 } else {
2665 if (sector + n > old_backing_num_sectors) {
2666 n = old_backing_num_sectors - sector;
2667 }
2668
2669 ret = bdrv_read(bs_old_backing, sector, buf_old, n);
2670 if (ret < 0) {
2671 error_report("error while reading from old backing file");
2672 goto out;
2673 }
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002674 }
Kevin Wolf87a1b3e2011-12-07 12:42:10 +01002675
Alex Bligha6166732012-10-16 13:46:18 +01002676 if (sector >= new_backing_num_sectors || !bs_new_backing) {
Kevin Wolf87a1b3e2011-12-07 12:42:10 +01002677 memset(buf_new, 0, n * BDRV_SECTOR_SIZE);
2678 } else {
2679 if (sector + n > new_backing_num_sectors) {
2680 n = new_backing_num_sectors - sector;
2681 }
2682
2683 ret = bdrv_read(bs_new_backing, sector, buf_new, n);
2684 if (ret < 0) {
2685 error_report("error while reading from new backing file");
2686 goto out;
2687 }
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002688 }
2689
2690 /* If they differ, we need to write to the COW file */
2691 uint64_t written = 0;
2692
2693 while (written < n) {
2694 int pnum;
2695
2696 if (compare_sectors(buf_old + written * 512,
Kevin Wolf60b1bd42010-02-17 12:32:59 +01002697 buf_new + written * 512, n - written, &pnum))
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002698 {
2699 ret = bdrv_write(bs, sector + written,
2700 buf_old + written * 512, pnum);
2701 if (ret < 0) {
Jes Sorensen15654a62010-12-16 14:31:53 +01002702 error_report("Error while writing to COW image: %s",
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002703 strerror(-ret));
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09002704 goto out;
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002705 }
2706 }
2707
2708 written += pnum;
2709 }
Jes Sorensen6b837bc2011-03-30 14:16:25 +02002710 qemu_progress_print(local_progress, 100);
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002711 }
TeLeMand6771bf2010-02-08 16:20:00 +08002712
Kevin Wolfbb1c0592011-08-08 14:09:12 +02002713 qemu_vfree(buf_old);
2714 qemu_vfree(buf_new);
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002715 }
2716
2717 /*
2718 * Change the backing file. All clusters that are different from the old
2719 * backing file are overwritten in the COW file now, so the visible content
2720 * doesn't change when we switch the backing file.
2721 */
Alex Bligha6166732012-10-16 13:46:18 +01002722 if (out_baseimg && *out_baseimg) {
2723 ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt);
2724 } else {
2725 ret = bdrv_change_backing_file(bs, NULL, NULL);
2726 }
2727
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002728 if (ret == -ENOSPC) {
Jes Sorensen15654a62010-12-16 14:31:53 +01002729 error_report("Could not change the backing file to '%s': No "
2730 "space left in the file header", out_baseimg);
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002731 } else if (ret < 0) {
Jes Sorensen15654a62010-12-16 14:31:53 +01002732 error_report("Could not change the backing file to '%s': %s",
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002733 out_baseimg, strerror(-ret));
2734 }
2735
Jes Sorensen6b837bc2011-03-30 14:16:25 +02002736 qemu_progress_print(100, 0);
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002737 /*
2738 * TODO At this point it is possible to check if any clusters that are
2739 * allocated in the COW file are the same in the backing file. If so, they
2740 * could be dropped from the COW file. Don't do this before switching the
2741 * backing file, in case of a crash this would lead to corruption.
2742 */
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09002743out:
Jes Sorensen6b837bc2011-03-30 14:16:25 +02002744 qemu_progress_end();
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002745 /* Cleanup */
2746 if (!unsafe) {
Markus Armbruster26f54e92014-10-07 13:59:04 +02002747 blk_unref(blk_old_backing);
Markus Armbruster26f54e92014-10-07 13:59:04 +02002748 blk_unref(blk_new_backing);
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002749 }
2750
Markus Armbruster26f54e92014-10-07 13:59:04 +02002751 blk_unref(blk);
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09002752 if (ret) {
2753 return 1;
2754 }
Kevin Wolf3e85c6f2010-01-12 12:55:18 +01002755 return 0;
2756}
2757
Stefan Hajnocziae6b0ed2010-04-24 09:12:12 +01002758static int img_resize(int argc, char **argv)
2759{
2760 int c, ret, relative;
2761 const char *filename, *fmt, *size;
2762 int64_t n, total_size;
Miroslav Rezaninaf382d432013-02-13 09:09:40 +01002763 bool quiet = false;
Markus Armbruster26f54e92014-10-07 13:59:04 +02002764 BlockBackend *blk = NULL;
Jes Sorensen2a819982010-12-06 17:08:31 +01002765 BlockDriverState *bs = NULL;
Dong Xu Wang20caf0f2012-08-06 10:18:42 +08002766 QemuOpts *param;
2767 static QemuOptsList resize_options = {
2768 .name = "resize_options",
2769 .head = QTAILQ_HEAD_INITIALIZER(resize_options.head),
2770 .desc = {
2771 {
2772 .name = BLOCK_OPT_SIZE,
2773 .type = QEMU_OPT_SIZE,
2774 .help = "Virtual disk size"
2775 }, {
2776 /* end of list */
2777 }
Stefan Hajnocziae6b0ed2010-04-24 09:12:12 +01002778 },
Stefan Hajnocziae6b0ed2010-04-24 09:12:12 +01002779 };
2780
Kevin Wolfe80fec72011-04-29 10:58:12 +02002781 /* Remove size from argv manually so that negative numbers are not treated
2782 * as options by getopt. */
2783 if (argc < 3) {
Fam Zhengac1307a2014-04-22 13:36:11 +08002784 error_exit("Not enough arguments");
Kevin Wolfe80fec72011-04-29 10:58:12 +02002785 return 1;
2786 }
2787
2788 size = argv[--argc];
2789
2790 /* Parse getopt arguments */
Stefan Hajnocziae6b0ed2010-04-24 09:12:12 +01002791 fmt = NULL;
2792 for(;;) {
Miroslav Rezaninaf382d432013-02-13 09:09:40 +01002793 c = getopt(argc, argv, "f:hq");
Stefan Hajnocziae6b0ed2010-04-24 09:12:12 +01002794 if (c == -1) {
2795 break;
2796 }
2797 switch(c) {
Jes Sorensenef873942010-12-06 15:25:40 +01002798 case '?':
Stefan Hajnocziae6b0ed2010-04-24 09:12:12 +01002799 case 'h':
2800 help();
2801 break;
2802 case 'f':
2803 fmt = optarg;
2804 break;
Miroslav Rezaninaf382d432013-02-13 09:09:40 +01002805 case 'q':
2806 quiet = true;
2807 break;
Stefan Hajnocziae6b0ed2010-04-24 09:12:12 +01002808 }
2809 }
Kevin Wolffc11eb22013-08-05 10:53:04 +02002810 if (optind != argc - 1) {
Fam Zhengac1307a2014-04-22 13:36:11 +08002811 error_exit("Expecting one image file name");
Stefan Hajnocziae6b0ed2010-04-24 09:12:12 +01002812 }
2813 filename = argv[optind++];
Stefan Hajnocziae6b0ed2010-04-24 09:12:12 +01002814
2815 /* Choose grow, shrink, or absolute resize mode */
2816 switch (size[0]) {
2817 case '+':
2818 relative = 1;
2819 size++;
2820 break;
2821 case '-':
2822 relative = -1;
2823 size++;
2824 break;
2825 default:
2826 relative = 0;
2827 break;
2828 }
2829
2830 /* Parse size */
Peter Crosthwaite87ea75d2014-01-01 18:49:17 -08002831 param = qemu_opts_create(&resize_options, NULL, 0, &error_abort);
Dong Xu Wang20caf0f2012-08-06 10:18:42 +08002832 if (qemu_opt_set(param, BLOCK_OPT_SIZE, size)) {
Stefan Hajnocziae6b0ed2010-04-24 09:12:12 +01002833 /* Error message already printed when size parsing fails */
Jes Sorensen2a819982010-12-06 17:08:31 +01002834 ret = -1;
Dong Xu Wang20caf0f2012-08-06 10:18:42 +08002835 qemu_opts_del(param);
Jes Sorensen2a819982010-12-06 17:08:31 +01002836 goto out;
Stefan Hajnocziae6b0ed2010-04-24 09:12:12 +01002837 }
Dong Xu Wang20caf0f2012-08-06 10:18:42 +08002838 n = qemu_opt_get_size(param, BLOCK_OPT_SIZE, 0);
2839 qemu_opts_del(param);
Stefan Hajnocziae6b0ed2010-04-24 09:12:12 +01002840
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02002841 blk = img_open("image", filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR,
2842 true, quiet);
2843 if (!blk) {
Jes Sorensen2a819982010-12-06 17:08:31 +01002844 ret = -1;
2845 goto out;
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09002846 }
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02002847 bs = blk_bs(blk);
Stefan Hajnocziae6b0ed2010-04-24 09:12:12 +01002848
2849 if (relative) {
2850 total_size = bdrv_getlength(bs) + n * relative;
2851 } else {
2852 total_size = n;
2853 }
2854 if (total_size <= 0) {
Jes Sorensen15654a62010-12-16 14:31:53 +01002855 error_report("New image size must be positive");
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09002856 ret = -1;
2857 goto out;
Stefan Hajnocziae6b0ed2010-04-24 09:12:12 +01002858 }
2859
2860 ret = bdrv_truncate(bs, total_size);
2861 switch (ret) {
2862 case 0:
Miroslav Rezaninaf382d432013-02-13 09:09:40 +01002863 qprintf(quiet, "Image resized.\n");
Stefan Hajnocziae6b0ed2010-04-24 09:12:12 +01002864 break;
2865 case -ENOTSUP:
Kevin Wolf259b2172012-03-06 12:44:45 +01002866 error_report("This image does not support resize");
Stefan Hajnocziae6b0ed2010-04-24 09:12:12 +01002867 break;
2868 case -EACCES:
Jes Sorensen15654a62010-12-16 14:31:53 +01002869 error_report("Image is read-only");
Stefan Hajnocziae6b0ed2010-04-24 09:12:12 +01002870 break;
2871 default:
Jes Sorensen15654a62010-12-16 14:31:53 +01002872 error_report("Error resizing image (%d)", -ret);
Stefan Hajnocziae6b0ed2010-04-24 09:12:12 +01002873 break;
2874 }
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09002875out:
Markus Armbruster26f54e92014-10-07 13:59:04 +02002876 blk_unref(blk);
MORITA Kazutakac2abcce2010-06-21 04:26:35 +09002877 if (ret) {
2878 return 1;
2879 }
Stefan Hajnocziae6b0ed2010-04-24 09:12:12 +01002880 return 0;
2881}
2882
Max Reitz76a3a342014-10-27 11:12:51 +01002883static void amend_status_cb(BlockDriverState *bs,
2884 int64_t offset, int64_t total_work_size)
2885{
2886 qemu_progress_print(100.f * offset / total_work_size, 0);
2887}
2888
Max Reitz6f176b42013-09-03 10:09:50 +02002889static int img_amend(int argc, char **argv)
2890{
2891 int c, ret = 0;
2892 char *options = NULL;
Chunyan Liu83d05212014-06-05 17:20:51 +08002893 QemuOptsList *create_opts = NULL;
2894 QemuOpts *opts = NULL;
Max Reitzbd39e6e2014-07-22 22:58:43 +02002895 const char *fmt = NULL, *filename, *cache;
2896 int flags;
Max Reitz76a3a342014-10-27 11:12:51 +01002897 bool quiet = false, progress = false;
Markus Armbruster26f54e92014-10-07 13:59:04 +02002898 BlockBackend *blk = NULL;
Max Reitz6f176b42013-09-03 10:09:50 +02002899 BlockDriverState *bs = NULL;
2900
Max Reitzbd39e6e2014-07-22 22:58:43 +02002901 cache = BDRV_DEFAULT_CACHE;
Max Reitz6f176b42013-09-03 10:09:50 +02002902 for (;;) {
Max Reitz76a3a342014-10-27 11:12:51 +01002903 c = getopt(argc, argv, "ho:f:t:pq");
Max Reitz6f176b42013-09-03 10:09:50 +02002904 if (c == -1) {
2905 break;
2906 }
2907
2908 switch (c) {
2909 case 'h':
2910 case '?':
2911 help();
2912 break;
2913 case 'o':
Kevin Wolf626f84f2014-02-21 16:24:06 +01002914 if (!is_valid_option_list(optarg)) {
2915 error_report("Invalid option list: %s", optarg);
2916 ret = -1;
2917 goto out;
2918 }
2919 if (!options) {
2920 options = g_strdup(optarg);
2921 } else {
2922 char *old_options = options;
2923 options = g_strdup_printf("%s,%s", options, optarg);
2924 g_free(old_options);
2925 }
Max Reitz6f176b42013-09-03 10:09:50 +02002926 break;
2927 case 'f':
2928 fmt = optarg;
2929 break;
Max Reitzbd39e6e2014-07-22 22:58:43 +02002930 case 't':
2931 cache = optarg;
2932 break;
Max Reitz76a3a342014-10-27 11:12:51 +01002933 case 'p':
2934 progress = true;
2935 break;
Max Reitz6f176b42013-09-03 10:09:50 +02002936 case 'q':
2937 quiet = true;
2938 break;
2939 }
2940 }
2941
Max Reitz6f176b42013-09-03 10:09:50 +02002942 if (!options) {
Fam Zhengac1307a2014-04-22 13:36:11 +08002943 error_exit("Must specify options (-o)");
Max Reitz6f176b42013-09-03 10:09:50 +02002944 }
2945
Max Reitz76a3a342014-10-27 11:12:51 +01002946 if (quiet) {
2947 progress = false;
2948 }
2949 qemu_progress_init(progress, 1.0);
2950
Kevin Wolfa283cb62014-02-21 16:24:07 +01002951 filename = (optind == argc - 1) ? argv[argc - 1] : NULL;
2952 if (fmt && has_help_option(options)) {
2953 /* If a format is explicitly specified (and possibly no filename is
2954 * given), print option help here */
2955 ret = print_block_option_help(filename, fmt);
2956 goto out;
2957 }
2958
2959 if (optind != argc - 1) {
Max Reitzb2f27e42014-10-27 11:12:52 +01002960 error_report("Expecting one image file name");
2961 ret = -1;
2962 goto out;
Kevin Wolfa283cb62014-02-21 16:24:07 +01002963 }
Max Reitz6f176b42013-09-03 10:09:50 +02002964
Max Reitzbd39e6e2014-07-22 22:58:43 +02002965 flags = BDRV_O_FLAGS | BDRV_O_RDWR;
2966 ret = bdrv_parse_cache_flags(cache, &flags);
2967 if (ret < 0) {
2968 error_report("Invalid cache option: %s", cache);
2969 goto out;
2970 }
2971
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02002972 blk = img_open("image", filename, fmt, flags, true, quiet);
2973 if (!blk) {
Max Reitz6f176b42013-09-03 10:09:50 +02002974 ret = -1;
2975 goto out;
2976 }
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02002977 bs = blk_bs(blk);
Max Reitz6f176b42013-09-03 10:09:50 +02002978
2979 fmt = bs->drv->format_name;
2980
Kevin Wolf626f84f2014-02-21 16:24:06 +01002981 if (has_help_option(options)) {
Kevin Wolfa283cb62014-02-21 16:24:07 +01002982 /* If the format was auto-detected, print option help here */
Max Reitz6f176b42013-09-03 10:09:50 +02002983 ret = print_block_option_help(filename, fmt);
2984 goto out;
2985 }
2986
Max Reitzb2439d22014-12-02 18:32:47 +01002987 if (!bs->drv->create_opts) {
2988 error_report("Format driver '%s' does not support any options to amend",
2989 fmt);
2990 ret = -1;
2991 goto out;
2992 }
2993
Chunyan Liuc282e1f2014-06-05 17:21:11 +08002994 create_opts = qemu_opts_append(create_opts, bs->drv->create_opts);
Chunyan Liu83d05212014-06-05 17:20:51 +08002995 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort);
2996 if (options && qemu_opts_do_parse(opts, options, NULL)) {
Max Reitz6f176b42013-09-03 10:09:50 +02002997 error_report("Invalid options for file format '%s'", fmt);
2998 ret = -1;
2999 goto out;
3000 }
3001
Max Reitz76a3a342014-10-27 11:12:51 +01003002 /* In case the driver does not call amend_status_cb() */
3003 qemu_progress_print(0.f, 0);
3004 ret = bdrv_amend_options(bs, opts, &amend_status_cb);
3005 qemu_progress_print(100.f, 0);
Max Reitz6f176b42013-09-03 10:09:50 +02003006 if (ret < 0) {
3007 error_report("Error while amending options: %s", strerror(-ret));
3008 goto out;
3009 }
3010
3011out:
Max Reitz76a3a342014-10-27 11:12:51 +01003012 qemu_progress_end();
3013
Markus Armbruster26f54e92014-10-07 13:59:04 +02003014 blk_unref(blk);
Chunyan Liu83d05212014-06-05 17:20:51 +08003015 qemu_opts_del(opts);
3016 qemu_opts_free(create_opts);
Kevin Wolf626f84f2014-02-21 16:24:06 +01003017 g_free(options);
3018
Max Reitz6f176b42013-09-03 10:09:50 +02003019 if (ret) {
3020 return 1;
3021 }
3022 return 0;
3023}
3024
Anthony Liguoric227f092009-10-01 16:12:16 -05003025static const img_cmd_t img_cmds[] = {
Stuart Brady153859b2009-06-07 00:42:17 +01003026#define DEF(option, callback, arg_string) \
3027 { option, callback },
3028#include "qemu-img-cmds.h"
3029#undef DEF
3030#undef GEN_DOCS
3031 { NULL, NULL, },
3032};
3033
bellardea2384d2004-08-01 21:59:26 +00003034int main(int argc, char **argv)
3035{
Anthony Liguoric227f092009-10-01 16:12:16 -05003036 const img_cmd_t *cmd;
Stuart Brady153859b2009-06-07 00:42:17 +01003037 const char *cmdname;
Chrysostomos Nanakos2f78e492014-09-18 14:30:49 +03003038 Error *local_error = NULL;
Jeff Cody7db16892014-04-25 17:02:32 -04003039 int c;
Jeff Cody7db16892014-04-25 17:02:32 -04003040 static const struct option long_options[] = {
3041 {"help", no_argument, 0, 'h'},
Jeff Cody5f6979c2014-04-28 14:37:18 -04003042 {"version", no_argument, 0, 'v'},
Jeff Cody7db16892014-04-25 17:02:32 -04003043 {0, 0, 0, 0}
3044 };
bellardea2384d2004-08-01 21:59:26 +00003045
MORITA Kazutaka526eda12013-07-23 17:30:11 +09003046#ifdef CONFIG_POSIX
3047 signal(SIGPIPE, SIG_IGN);
3048#endif
3049
Kevin Wolf53f76e52010-12-16 15:10:32 +01003050 error_set_progname(argv[0]);
Fam Zheng10f5bff2014-02-10 14:48:51 +08003051 qemu_init_exec_dir(argv[0]);
Kevin Wolf53f76e52010-12-16 15:10:32 +01003052
Chrysostomos Nanakos2f78e492014-09-18 14:30:49 +03003053 if (qemu_init_main_loop(&local_error)) {
Markus Armbruster565f65d2015-02-12 13:55:05 +01003054 error_report_err(local_error);
Chrysostomos Nanakos2f78e492014-09-18 14:30:49 +03003055 exit(EXIT_FAILURE);
3056 }
3057
bellardea2384d2004-08-01 21:59:26 +00003058 bdrv_init();
Fam Zhengac1307a2014-04-22 13:36:11 +08003059 if (argc < 2) {
3060 error_exit("Not enough arguments");
3061 }
Stuart Brady153859b2009-06-07 00:42:17 +01003062 cmdname = argv[1];
Stuart Brady153859b2009-06-07 00:42:17 +01003063
3064 /* find the command */
Jeff Cody5f6979c2014-04-28 14:37:18 -04003065 for (cmd = img_cmds; cmd->name != NULL; cmd++) {
Stuart Brady153859b2009-06-07 00:42:17 +01003066 if (!strcmp(cmdname, cmd->name)) {
Jeff Cody7db16892014-04-25 17:02:32 -04003067 return cmd->handler(argc - 1, argv + 1);
Stuart Brady153859b2009-06-07 00:42:17 +01003068 }
bellardea2384d2004-08-01 21:59:26 +00003069 }
Stuart Brady153859b2009-06-07 00:42:17 +01003070
Jeff Cody5f6979c2014-04-28 14:37:18 -04003071 c = getopt_long(argc, argv, "h", long_options, NULL);
Jeff Cody7db16892014-04-25 17:02:32 -04003072
3073 if (c == 'h') {
3074 help();
3075 }
Jeff Cody5f6979c2014-04-28 14:37:18 -04003076 if (c == 'v') {
3077 printf(QEMU_IMG_VERSION);
3078 return 0;
3079 }
Jeff Cody7db16892014-04-25 17:02:32 -04003080
Stuart Brady153859b2009-06-07 00:42:17 +01003081 /* not found */
Fam Zhengac1307a2014-04-22 13:36:11 +08003082 error_exit("Command not found: %s", cmdname);
bellardea2384d2004-08-01 21:59:26 +00003083}