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/*
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* QEMU disk image utility
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qapi-visit.h" |
25 |
#include "qapi/qmp-output-visitor.h" |
26 |
#include "qapi/qmp/qjson.h" |
27 |
#include "qemu-common.h" |
28 |
#include "qemu/option.h" |
29 |
#include "qemu/error-report.h" |
30 |
#include "qemu/osdep.h" |
31 |
#include "sysemu/sysemu.h" |
32 |
#include "block/block_int.h" |
33 |
#include "block/qapi.h" |
34 |
#include <getopt.h> |
35 |
|
36 |
typedef struct img_cmd_t { |
37 |
const char *name; |
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int (*handler)(int argc, char **argv); |
39 |
} img_cmd_t; |
40 |
|
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enum {
|
42 |
OPTION_OUTPUT = 256,
|
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OPTION_BACKING_CHAIN = 257,
|
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}; |
45 |
|
46 |
typedef enum OutputFormat { |
47 |
OFORMAT_JSON, |
48 |
OFORMAT_HUMAN, |
49 |
} OutputFormat; |
50 |
|
51 |
/* Default to cache=writeback as data integrity is not important for qemu-tcg. */
|
52 |
#define BDRV_O_FLAGS BDRV_O_CACHE_WB
|
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#define BDRV_DEFAULT_CACHE "writeback" |
54 |
|
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static void format_print(void *opaque, const char *name) |
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{ |
57 |
printf(" %s", name);
|
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} |
59 |
|
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/* Please keep in synch with qemu-img.texi */
|
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static void help(void) |
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{ |
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const char *help_msg = |
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"qemu-img version " QEMU_VERSION ", Copyright (c) 2004-2008 Fabrice Bellard\n" |
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"usage: qemu-img command [command options]\n"
|
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"QEMU disk image utility\n"
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"\n"
|
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"Command syntax:\n"
|
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#define DEF(option, callback, arg_string) \
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" " arg_string "\n" |
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#include "qemu-img-cmds.h" |
72 |
#undef DEF
|
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#undef GEN_DOCS
|
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"\n"
|
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"Command parameters:\n"
|
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" 'filename' is a disk image filename\n"
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" 'fmt' is the disk image format. It is guessed automatically in most cases\n"
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" 'cache' is the cache mode used to write the output disk image, the valid\n"
|
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" options are: 'none', 'writeback' (default, except for convert), 'writethrough',\n"
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" 'directsync' and 'unsafe' (default for convert)\n"
|
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" 'size' is the disk image size in bytes. Optional suffixes\n"
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" 'k' or 'K' (kilobyte, 1024), 'M' (megabyte, 1024k), 'G' (gigabyte, 1024M),\n"
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" 'T' (terabyte, 1024G), 'P' (petabyte, 1024T) and 'E' (exabyte, 1024P) are\n"
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" supported. 'b' is ignored.\n"
|
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" 'output_filename' is the destination disk image filename\n"
|
86 |
" 'output_fmt' is the destination format\n"
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" 'options' is a comma separated list of format specific options in a\n"
|
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" name=value format. Use -o ? for an overview of the options supported by the\n"
|
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" used format\n"
|
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" 'snapshot_param' is param used for internal snapshot, format\n"
|
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" is 'snapshot.id=[ID],snapshot.name=[NAME]', or\n"
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" '[ID_OR_NAME]'\n"
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" 'snapshot_id_or_name' is deprecated, use 'snapshot_param'\n"
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" instead\n"
|
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" '-c' indicates that target image must be compressed (qcow format only)\n"
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" '-u' enables unsafe rebasing. It is assumed that old and new backing file\n"
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" match exactly. The image doesn't need a working backing file before\n"
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" rebasing in this case (useful for renaming the backing file)\n"
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" '-h' with or without a command shows this help and lists the supported formats\n"
|
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" '-p' show progress of command (only certain commands)\n"
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" '-q' use Quiet mode - do not print any output (except errors)\n"
|
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" '-S' indicates the consecutive number of bytes (defaults to 4k) that must\n"
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" contain only zeros for qemu-img to create a sparse image during\n"
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" conversion. If the number of bytes is 0, the source will not be scanned for\n"
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" unallocated or zero sectors, and the destination image will always be\n"
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" fully allocated\n"
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" '--output' takes the format in which the output must be done (human or json)\n"
|
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" '-n' skips the target volume creation (useful if the volume is created\n"
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" prior to running qemu-img)\n"
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"\n"
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"Parameters to check subcommand:\n"
|
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" '-r' tries to repair any inconsistencies that are found during the check.\n"
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" '-r leaks' repairs only cluster leaks, whereas '-r all' fixes all\n"
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" kinds of errors, with a higher risk of choosing the wrong fix or\n"
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" hiding corruption that has already occurred.\n"
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"\n"
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"Parameters to snapshot subcommand:\n"
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" 'snapshot' is the name of the snapshot to create, apply or delete\n"
|
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" '-a' applies a snapshot (revert disk to saved state)\n"
|
120 |
" '-c' creates a snapshot\n"
|
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" '-d' deletes a snapshot\n"
|
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" '-l' lists all snapshots in the given image\n"
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"\n"
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"Parameters to compare subcommand:\n"
|
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" '-f' first image format\n"
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" '-F' second image format\n"
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" '-s' run in Strict mode - fail on different image size or sector allocation\n";
|
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|
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printf("%s\nSupported formats:", help_msg);
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bdrv_iterate_format(format_print, NULL);
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printf("\n");
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exit(1);
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} |
134 |
|
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static int GCC_FMT_ATTR(2, 3) qprintf(bool quiet, const char *fmt, ...) |
136 |
{ |
137 |
int ret = 0; |
138 |
if (!quiet) {
|
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va_list args; |
140 |
va_start(args, fmt); |
141 |
ret = vprintf(fmt, args); |
142 |
va_end(args); |
143 |
} |
144 |
return ret;
|
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} |
146 |
|
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#if defined(WIN32)
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/* XXX: put correct support for win32 */
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static int read_password(char *buf, int buf_size) |
150 |
{ |
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int c, i;
|
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printf("Password: ");
|
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fflush(stdout); |
154 |
i = 0;
|
155 |
for(;;) {
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c = getchar(); |
157 |
if (c == '\n') |
158 |
break;
|
159 |
if (i < (buf_size - 1)) |
160 |
buf[i++] = c; |
161 |
} |
162 |
buf[i] = '\0';
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return 0; |
164 |
} |
165 |
|
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#else
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|
168 |
#include <termios.h> |
169 |
|
170 |
static struct termios oldtty; |
171 |
|
172 |
static void term_exit(void) |
173 |
{ |
174 |
tcsetattr (0, TCSANOW, &oldtty);
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175 |
} |
176 |
|
177 |
static void term_init(void) |
178 |
{ |
179 |
struct termios tty;
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|
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tcgetattr (0, &tty);
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oldtty = tty; |
183 |
|
184 |
tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP |
185 |
|INLCR|IGNCR|ICRNL|IXON); |
186 |
tty.c_oflag |= OPOST; |
187 |
tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN); |
188 |
tty.c_cflag &= ~(CSIZE|PARENB); |
189 |
tty.c_cflag |= CS8; |
190 |
tty.c_cc[VMIN] = 1;
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191 |
tty.c_cc[VTIME] = 0;
|
192 |
|
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tcsetattr (0, TCSANOW, &tty);
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194 |
|
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atexit(term_exit); |
196 |
} |
197 |
|
198 |
static int read_password(char *buf, int buf_size) |
199 |
{ |
200 |
uint8_t ch; |
201 |
int i, ret;
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|
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printf("password: ");
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fflush(stdout); |
205 |
term_init(); |
206 |
i = 0;
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for(;;) {
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ret = read(0, &ch, 1); |
209 |
if (ret == -1) { |
210 |
if (errno == EAGAIN || errno == EINTR) {
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continue;
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} else {
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ret = -1;
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break;
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} |
216 |
} else if (ret == 0) { |
217 |
ret = -1;
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218 |
break;
|
219 |
} else {
|
220 |
if (ch == '\r') { |
221 |
ret = 0;
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break;
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223 |
} |
224 |
if (i < (buf_size - 1)) |
225 |
buf[i++] = ch; |
226 |
} |
227 |
} |
228 |
term_exit(); |
229 |
buf[i] = '\0';
|
230 |
printf("\n");
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return ret;
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232 |
} |
233 |
#endif
|
234 |
|
235 |
static int print_block_option_help(const char *filename, const char *fmt) |
236 |
{ |
237 |
BlockDriver *drv, *proto_drv; |
238 |
QEMUOptionParameter *create_options = NULL;
|
239 |
|
240 |
/* Find driver and parse its options */
|
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drv = bdrv_find_format(fmt); |
242 |
if (!drv) {
|
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error_report("Unknown file format '%s'", fmt);
|
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return 1; |
245 |
} |
246 |
|
247 |
create_options = append_option_parameters(create_options, |
248 |
drv->create_options); |
249 |
|
250 |
if (filename) {
|
251 |
proto_drv = bdrv_find_protocol(filename, true);
|
252 |
if (!proto_drv) {
|
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error_report("Unknown protocol '%s'", filename);
|
254 |
return 1; |
255 |
} |
256 |
create_options = append_option_parameters(create_options, |
257 |
proto_drv->create_options); |
258 |
} |
259 |
|
260 |
print_option_help(create_options); |
261 |
free_option_parameters(create_options); |
262 |
return 0; |
263 |
} |
264 |
|
265 |
static BlockDriverState *bdrv_new_open(const char *filename, |
266 |
const char *fmt, |
267 |
int flags,
|
268 |
bool require_io,
|
269 |
bool quiet)
|
270 |
{ |
271 |
BlockDriverState *bs; |
272 |
BlockDriver *drv; |
273 |
char password[256]; |
274 |
Error *local_err = NULL;
|
275 |
int ret;
|
276 |
|
277 |
bs = bdrv_new("image");
|
278 |
|
279 |
if (fmt) {
|
280 |
drv = bdrv_find_format(fmt); |
281 |
if (!drv) {
|
282 |
error_report("Unknown file format '%s'", fmt);
|
283 |
goto fail;
|
284 |
} |
285 |
} else {
|
286 |
drv = NULL;
|
287 |
} |
288 |
|
289 |
ret = bdrv_open(&bs, filename, NULL, NULL, flags, drv, &local_err); |
290 |
if (ret < 0) { |
291 |
error_report("Could not open '%s': %s", filename,
|
292 |
error_get_pretty(local_err)); |
293 |
error_free(local_err); |
294 |
goto fail;
|
295 |
} |
296 |
|
297 |
if (bdrv_is_encrypted(bs) && require_io) {
|
298 |
qprintf(quiet, "Disk image '%s' is encrypted.\n", filename);
|
299 |
if (read_password(password, sizeof(password)) < 0) { |
300 |
error_report("No password given");
|
301 |
goto fail;
|
302 |
} |
303 |
if (bdrv_set_key(bs, password) < 0) { |
304 |
error_report("invalid password");
|
305 |
goto fail;
|
306 |
} |
307 |
} |
308 |
return bs;
|
309 |
fail:
|
310 |
bdrv_unref(bs); |
311 |
return NULL; |
312 |
} |
313 |
|
314 |
static int add_old_style_options(const char *fmt, QEMUOptionParameter *list, |
315 |
const char *base_filename, |
316 |
const char *base_fmt) |
317 |
{ |
318 |
if (base_filename) {
|
319 |
if (set_option_parameter(list, BLOCK_OPT_BACKING_FILE, base_filename)) {
|
320 |
error_report("Backing file not supported for file format '%s'",
|
321 |
fmt); |
322 |
return -1; |
323 |
} |
324 |
} |
325 |
if (base_fmt) {
|
326 |
if (set_option_parameter(list, BLOCK_OPT_BACKING_FMT, base_fmt)) {
|
327 |
error_report("Backing file format not supported for file "
|
328 |
"format '%s'", fmt);
|
329 |
return -1; |
330 |
} |
331 |
} |
332 |
return 0; |
333 |
} |
334 |
|
335 |
static int img_create(int argc, char **argv) |
336 |
{ |
337 |
int c;
|
338 |
uint64_t img_size = -1;
|
339 |
const char *fmt = "raw"; |
340 |
const char *base_fmt = NULL; |
341 |
const char *filename; |
342 |
const char *base_filename = NULL; |
343 |
char *options = NULL; |
344 |
Error *local_err = NULL;
|
345 |
bool quiet = false; |
346 |
|
347 |
for(;;) {
|
348 |
c = getopt(argc, argv, "F:b:f:he6o:q");
|
349 |
if (c == -1) { |
350 |
break;
|
351 |
} |
352 |
switch(c) {
|
353 |
case '?': |
354 |
case 'h': |
355 |
help(); |
356 |
break;
|
357 |
case 'F': |
358 |
base_fmt = optarg; |
359 |
break;
|
360 |
case 'b': |
361 |
base_filename = optarg; |
362 |
break;
|
363 |
case 'f': |
364 |
fmt = optarg; |
365 |
break;
|
366 |
case 'e': |
367 |
error_report("option -e is deprecated, please use \'-o "
|
368 |
"encryption\' instead!");
|
369 |
goto fail;
|
370 |
case '6': |
371 |
error_report("option -6 is deprecated, please use \'-o "
|
372 |
"compat6\' instead!");
|
373 |
goto fail;
|
374 |
case 'o': |
375 |
if (!is_valid_option_list(optarg)) {
|
376 |
error_report("Invalid option list: %s", optarg);
|
377 |
goto fail;
|
378 |
} |
379 |
if (!options) {
|
380 |
options = g_strdup(optarg); |
381 |
} else {
|
382 |
char *old_options = options;
|
383 |
options = g_strdup_printf("%s,%s", options, optarg);
|
384 |
g_free(old_options); |
385 |
} |
386 |
break;
|
387 |
case 'q': |
388 |
quiet = true;
|
389 |
break;
|
390 |
} |
391 |
} |
392 |
|
393 |
/* Get the filename */
|
394 |
filename = (optind < argc) ? argv[optind] : NULL;
|
395 |
if (options && has_help_option(options)) {
|
396 |
g_free(options); |
397 |
return print_block_option_help(filename, fmt);
|
398 |
} |
399 |
|
400 |
if (optind >= argc) {
|
401 |
help(); |
402 |
} |
403 |
optind++; |
404 |
|
405 |
/* Get image size, if specified */
|
406 |
if (optind < argc) {
|
407 |
int64_t sval; |
408 |
char *end;
|
409 |
sval = strtosz_suffix(argv[optind++], &end, STRTOSZ_DEFSUFFIX_B); |
410 |
if (sval < 0 || *end) { |
411 |
if (sval == -ERANGE) {
|
412 |
error_report("Image size must be less than 8 EiB!");
|
413 |
} else {
|
414 |
error_report("Invalid image size specified! You may use k, M, "
|
415 |
"G, T, P or E suffixes for ");
|
416 |
error_report("kilobytes, megabytes, gigabytes, terabytes, "
|
417 |
"petabytes and exabytes.");
|
418 |
} |
419 |
goto fail;
|
420 |
} |
421 |
img_size = (uint64_t)sval; |
422 |
} |
423 |
if (optind != argc) {
|
424 |
help(); |
425 |
} |
426 |
|
427 |
bdrv_img_create(filename, fmt, base_filename, base_fmt, |
428 |
options, img_size, BDRV_O_FLAGS, &local_err, quiet); |
429 |
if (local_err) {
|
430 |
error_report("%s: %s", filename, error_get_pretty(local_err));
|
431 |
error_free(local_err); |
432 |
goto fail;
|
433 |
} |
434 |
|
435 |
g_free(options); |
436 |
return 0; |
437 |
|
438 |
fail:
|
439 |
g_free(options); |
440 |
return 1; |
441 |
} |
442 |
|
443 |
static void dump_json_image_check(ImageCheck *check, bool quiet) |
444 |
{ |
445 |
Error *errp = NULL;
|
446 |
QString *str; |
447 |
QmpOutputVisitor *ov = qmp_output_visitor_new(); |
448 |
QObject *obj; |
449 |
visit_type_ImageCheck(qmp_output_get_visitor(ov), |
450 |
&check, NULL, &errp);
|
451 |
obj = qmp_output_get_qobject(ov); |
452 |
str = qobject_to_json_pretty(obj); |
453 |
assert(str != NULL);
|
454 |
qprintf(quiet, "%s\n", qstring_get_str(str));
|
455 |
qobject_decref(obj); |
456 |
qmp_output_visitor_cleanup(ov); |
457 |
QDECREF(str); |
458 |
} |
459 |
|
460 |
static void dump_human_image_check(ImageCheck *check, bool quiet) |
461 |
{ |
462 |
if (!(check->corruptions || check->leaks || check->check_errors)) {
|
463 |
qprintf(quiet, "No errors were found on the image.\n");
|
464 |
} else {
|
465 |
if (check->corruptions) {
|
466 |
qprintf(quiet, "\n%" PRId64 " errors were found on the image.\n" |
467 |
"Data may be corrupted, or further writes to the image "
|
468 |
"may corrupt it.\n",
|
469 |
check->corruptions); |
470 |
} |
471 |
|
472 |
if (check->leaks) {
|
473 |
qprintf(quiet, |
474 |
"\n%" PRId64 " leaked clusters were found on the image.\n" |
475 |
"This means waste of disk space, but no harm to data.\n",
|
476 |
check->leaks); |
477 |
} |
478 |
|
479 |
if (check->check_errors) {
|
480 |
qprintf(quiet, |
481 |
"\n%" PRId64
|
482 |
" internal errors have occurred during the check.\n",
|
483 |
check->check_errors); |
484 |
} |
485 |
} |
486 |
|
487 |
if (check->total_clusters != 0 && check->allocated_clusters != 0) { |
488 |
qprintf(quiet, "%" PRId64 "/%" PRId64 " = %0.2f%% allocated, " |
489 |
"%0.2f%% fragmented, %0.2f%% compressed clusters\n",
|
490 |
check->allocated_clusters, check->total_clusters, |
491 |
check->allocated_clusters * 100.0 / check->total_clusters, |
492 |
check->fragmented_clusters * 100.0 / check->allocated_clusters, |
493 |
check->compressed_clusters * 100.0 / |
494 |
check->allocated_clusters); |
495 |
} |
496 |
|
497 |
if (check->image_end_offset) {
|
498 |
qprintf(quiet, |
499 |
"Image end offset: %" PRId64 "\n", check->image_end_offset); |
500 |
} |
501 |
} |
502 |
|
503 |
static int collect_image_check(BlockDriverState *bs, |
504 |
ImageCheck *check, |
505 |
const char *filename, |
506 |
const char *fmt, |
507 |
int fix)
|
508 |
{ |
509 |
int ret;
|
510 |
BdrvCheckResult result; |
511 |
|
512 |
ret = bdrv_check(bs, &result, fix); |
513 |
if (ret < 0) { |
514 |
return ret;
|
515 |
} |
516 |
|
517 |
check->filename = g_strdup(filename); |
518 |
check->format = g_strdup(bdrv_get_format_name(bs)); |
519 |
check->check_errors = result.check_errors; |
520 |
check->corruptions = result.corruptions; |
521 |
check->has_corruptions = result.corruptions != 0;
|
522 |
check->leaks = result.leaks; |
523 |
check->has_leaks = result.leaks != 0;
|
524 |
check->corruptions_fixed = result.corruptions_fixed; |
525 |
check->has_corruptions_fixed = result.corruptions != 0;
|
526 |
check->leaks_fixed = result.leaks_fixed; |
527 |
check->has_leaks_fixed = result.leaks != 0;
|
528 |
check->image_end_offset = result.image_end_offset; |
529 |
check->has_image_end_offset = result.image_end_offset != 0;
|
530 |
check->total_clusters = result.bfi.total_clusters; |
531 |
check->has_total_clusters = result.bfi.total_clusters != 0;
|
532 |
check->allocated_clusters = result.bfi.allocated_clusters; |
533 |
check->has_allocated_clusters = result.bfi.allocated_clusters != 0;
|
534 |
check->fragmented_clusters = result.bfi.fragmented_clusters; |
535 |
check->has_fragmented_clusters = result.bfi.fragmented_clusters != 0;
|
536 |
check->compressed_clusters = result.bfi.compressed_clusters; |
537 |
check->has_compressed_clusters = result.bfi.compressed_clusters != 0;
|
538 |
|
539 |
return 0; |
540 |
} |
541 |
|
542 |
/*
|
543 |
* Checks an image for consistency. Exit codes:
|
544 |
*
|
545 |
* 0 - Check completed, image is good
|
546 |
* 1 - Check not completed because of internal errors
|
547 |
* 2 - Check completed, image is corrupted
|
548 |
* 3 - Check completed, image has leaked clusters, but is good otherwise
|
549 |
*/
|
550 |
static int img_check(int argc, char **argv) |
551 |
{ |
552 |
int c, ret;
|
553 |
OutputFormat output_format = OFORMAT_HUMAN; |
554 |
const char *filename, *fmt, *output; |
555 |
BlockDriverState *bs; |
556 |
int fix = 0; |
557 |
int flags = BDRV_O_FLAGS | BDRV_O_CHECK;
|
558 |
ImageCheck *check; |
559 |
bool quiet = false; |
560 |
|
561 |
fmt = NULL;
|
562 |
output = NULL;
|
563 |
for(;;) {
|
564 |
int option_index = 0; |
565 |
static const struct option long_options[] = { |
566 |
{"help", no_argument, 0, 'h'}, |
567 |
{"format", required_argument, 0, 'f'}, |
568 |
{"repair", no_argument, 0, 'r'}, |
569 |
{"output", required_argument, 0, OPTION_OUTPUT}, |
570 |
{0, 0, 0, 0} |
571 |
}; |
572 |
c = getopt_long(argc, argv, "f:hr:q",
|
573 |
long_options, &option_index); |
574 |
if (c == -1) { |
575 |
break;
|
576 |
} |
577 |
switch(c) {
|
578 |
case '?': |
579 |
case 'h': |
580 |
help(); |
581 |
break;
|
582 |
case 'f': |
583 |
fmt = optarg; |
584 |
break;
|
585 |
case 'r': |
586 |
flags |= BDRV_O_RDWR; |
587 |
|
588 |
if (!strcmp(optarg, "leaks")) { |
589 |
fix = BDRV_FIX_LEAKS; |
590 |
} else if (!strcmp(optarg, "all")) { |
591 |
fix = BDRV_FIX_LEAKS | BDRV_FIX_ERRORS; |
592 |
} else {
|
593 |
help(); |
594 |
} |
595 |
break;
|
596 |
case OPTION_OUTPUT:
|
597 |
output = optarg; |
598 |
break;
|
599 |
case 'q': |
600 |
quiet = true;
|
601 |
break;
|
602 |
} |
603 |
} |
604 |
if (optind != argc - 1) { |
605 |
help(); |
606 |
} |
607 |
filename = argv[optind++]; |
608 |
|
609 |
if (output && !strcmp(output, "json")) { |
610 |
output_format = OFORMAT_JSON; |
611 |
} else if (output && !strcmp(output, "human")) { |
612 |
output_format = OFORMAT_HUMAN; |
613 |
} else if (output) { |
614 |
error_report("--output must be used with human or json as argument.");
|
615 |
return 1; |
616 |
} |
617 |
|
618 |
bs = bdrv_new_open(filename, fmt, flags, true, quiet);
|
619 |
if (!bs) {
|
620 |
return 1; |
621 |
} |
622 |
|
623 |
check = g_new0(ImageCheck, 1);
|
624 |
ret = collect_image_check(bs, check, filename, fmt, fix); |
625 |
|
626 |
if (ret == -ENOTSUP) {
|
627 |
if (output_format == OFORMAT_HUMAN) {
|
628 |
error_report("This image format does not support checks");
|
629 |
} |
630 |
ret = 63;
|
631 |
goto fail;
|
632 |
} |
633 |
|
634 |
if (check->corruptions_fixed || check->leaks_fixed) {
|
635 |
int corruptions_fixed, leaks_fixed;
|
636 |
|
637 |
leaks_fixed = check->leaks_fixed; |
638 |
corruptions_fixed = check->corruptions_fixed; |
639 |
|
640 |
if (output_format == OFORMAT_HUMAN) {
|
641 |
qprintf(quiet, |
642 |
"The following inconsistencies were found and repaired:\n\n"
|
643 |
" %" PRId64 " leaked clusters\n" |
644 |
" %" PRId64 " corruptions\n\n" |
645 |
"Double checking the fixed image now...\n",
|
646 |
check->leaks_fixed, |
647 |
check->corruptions_fixed); |
648 |
} |
649 |
|
650 |
ret = collect_image_check(bs, check, filename, fmt, 0);
|
651 |
|
652 |
check->leaks_fixed = leaks_fixed; |
653 |
check->corruptions_fixed = corruptions_fixed; |
654 |
} |
655 |
|
656 |
switch (output_format) {
|
657 |
case OFORMAT_HUMAN:
|
658 |
dump_human_image_check(check, quiet); |
659 |
break;
|
660 |
case OFORMAT_JSON:
|
661 |
dump_json_image_check(check, quiet); |
662 |
break;
|
663 |
} |
664 |
|
665 |
if (ret || check->check_errors) {
|
666 |
ret = 1;
|
667 |
goto fail;
|
668 |
} |
669 |
|
670 |
if (check->corruptions) {
|
671 |
ret = 2;
|
672 |
} else if (check->leaks) { |
673 |
ret = 3;
|
674 |
} else {
|
675 |
ret = 0;
|
676 |
} |
677 |
|
678 |
fail:
|
679 |
qapi_free_ImageCheck(check); |
680 |
bdrv_unref(bs); |
681 |
|
682 |
return ret;
|
683 |
} |
684 |
|
685 |
static int img_commit(int argc, char **argv) |
686 |
{ |
687 |
int c, ret, flags;
|
688 |
const char *filename, *fmt, *cache; |
689 |
BlockDriverState *bs; |
690 |
bool quiet = false; |
691 |
|
692 |
fmt = NULL;
|
693 |
cache = BDRV_DEFAULT_CACHE; |
694 |
for(;;) {
|
695 |
c = getopt(argc, argv, "f:ht:q");
|
696 |
if (c == -1) { |
697 |
break;
|
698 |
} |
699 |
switch(c) {
|
700 |
case '?': |
701 |
case 'h': |
702 |
help(); |
703 |
break;
|
704 |
case 'f': |
705 |
fmt = optarg; |
706 |
break;
|
707 |
case 't': |
708 |
cache = optarg; |
709 |
break;
|
710 |
case 'q': |
711 |
quiet = true;
|
712 |
break;
|
713 |
} |
714 |
} |
715 |
if (optind != argc - 1) { |
716 |
help(); |
717 |
} |
718 |
filename = argv[optind++]; |
719 |
|
720 |
flags = BDRV_O_RDWR; |
721 |
ret = bdrv_parse_cache_flags(cache, &flags); |
722 |
if (ret < 0) { |
723 |
error_report("Invalid cache option: %s", cache);
|
724 |
return -1; |
725 |
} |
726 |
|
727 |
bs = bdrv_new_open(filename, fmt, flags, true, quiet);
|
728 |
if (!bs) {
|
729 |
return 1; |
730 |
} |
731 |
ret = bdrv_commit(bs); |
732 |
switch(ret) {
|
733 |
case 0: |
734 |
qprintf(quiet, "Image committed.\n");
|
735 |
break;
|
736 |
case -ENOENT:
|
737 |
error_report("No disk inserted");
|
738 |
break;
|
739 |
case -EACCES:
|
740 |
error_report("Image is read-only");
|
741 |
break;
|
742 |
case -ENOTSUP:
|
743 |
error_report("Image is already committed");
|
744 |
break;
|
745 |
default:
|
746 |
error_report("Error while committing image");
|
747 |
break;
|
748 |
} |
749 |
|
750 |
bdrv_unref(bs); |
751 |
if (ret) {
|
752 |
return 1; |
753 |
} |
754 |
return 0; |
755 |
} |
756 |
|
757 |
/*
|
758 |
* Returns true iff the first sector pointed to by 'buf' contains at least
|
759 |
* a non-NUL byte.
|
760 |
*
|
761 |
* 'pnum' is set to the number of sectors (including and immediately following
|
762 |
* the first one) that are known to be in the same allocated/unallocated state.
|
763 |
*/
|
764 |
static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) |
765 |
{ |
766 |
bool is_zero;
|
767 |
int i;
|
768 |
|
769 |
if (n <= 0) { |
770 |
*pnum = 0;
|
771 |
return 0; |
772 |
} |
773 |
is_zero = buffer_is_zero(buf, 512);
|
774 |
for(i = 1; i < n; i++) { |
775 |
buf += 512;
|
776 |
if (is_zero != buffer_is_zero(buf, 512)) { |
777 |
break;
|
778 |
} |
779 |
} |
780 |
*pnum = i; |
781 |
return !is_zero;
|
782 |
} |
783 |
|
784 |
/*
|
785 |
* Like is_allocated_sectors, but if the buffer starts with a used sector,
|
786 |
* up to 'min' consecutive sectors containing zeros are ignored. This avoids
|
787 |
* breaking up write requests for only small sparse areas.
|
788 |
*/
|
789 |
static int is_allocated_sectors_min(const uint8_t *buf, int n, int *pnum, |
790 |
int min)
|
791 |
{ |
792 |
int ret;
|
793 |
int num_checked, num_used;
|
794 |
|
795 |
if (n < min) {
|
796 |
min = n; |
797 |
} |
798 |
|
799 |
ret = is_allocated_sectors(buf, n, pnum); |
800 |
if (!ret) {
|
801 |
return ret;
|
802 |
} |
803 |
|
804 |
num_used = *pnum; |
805 |
buf += BDRV_SECTOR_SIZE * *pnum; |
806 |
n -= *pnum; |
807 |
num_checked = num_used; |
808 |
|
809 |
while (n > 0) { |
810 |
ret = is_allocated_sectors(buf, n, pnum); |
811 |
|
812 |
buf += BDRV_SECTOR_SIZE * *pnum; |
813 |
n -= *pnum; |
814 |
num_checked += *pnum; |
815 |
if (ret) {
|
816 |
num_used = num_checked; |
817 |
} else if (*pnum >= min) { |
818 |
break;
|
819 |
} |
820 |
} |
821 |
|
822 |
*pnum = num_used; |
823 |
return 1; |
824 |
} |
825 |
|
826 |
/*
|
827 |
* Compares two buffers sector by sector. Returns 0 if the first sector of both
|
828 |
* buffers matches, non-zero otherwise.
|
829 |
*
|
830 |
* pnum is set to the number of sectors (including and immediately following
|
831 |
* the first one) that are known to have the same comparison result
|
832 |
*/
|
833 |
static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n, |
834 |
int *pnum)
|
835 |
{ |
836 |
int res, i;
|
837 |
|
838 |
if (n <= 0) { |
839 |
*pnum = 0;
|
840 |
return 0; |
841 |
} |
842 |
|
843 |
res = !!memcmp(buf1, buf2, 512);
|
844 |
for(i = 1; i < n; i++) { |
845 |
buf1 += 512;
|
846 |
buf2 += 512;
|
847 |
|
848 |
if (!!memcmp(buf1, buf2, 512) != res) { |
849 |
break;
|
850 |
} |
851 |
} |
852 |
|
853 |
*pnum = i; |
854 |
return res;
|
855 |
} |
856 |
|
857 |
#define IO_BUF_SIZE (2 * 1024 * 1024) |
858 |
|
859 |
static int64_t sectors_to_bytes(int64_t sectors)
|
860 |
{ |
861 |
return sectors << BDRV_SECTOR_BITS;
|
862 |
} |
863 |
|
864 |
static int64_t sectors_to_process(int64_t total, int64_t from)
|
865 |
{ |
866 |
return MIN(total - from, IO_BUF_SIZE >> BDRV_SECTOR_BITS);
|
867 |
} |
868 |
|
869 |
/*
|
870 |
* Check if passed sectors are empty (not allocated or contain only 0 bytes)
|
871 |
*
|
872 |
* Returns 0 in case sectors are filled with 0, 1 if sectors contain non-zero
|
873 |
* data and negative value on error.
|
874 |
*
|
875 |
* @param bs: Driver used for accessing file
|
876 |
* @param sect_num: Number of first sector to check
|
877 |
* @param sect_count: Number of sectors to check
|
878 |
* @param filename: Name of disk file we are checking (logging purpose)
|
879 |
* @param buffer: Allocated buffer for storing read data
|
880 |
* @param quiet: Flag for quiet mode
|
881 |
*/
|
882 |
static int check_empty_sectors(BlockDriverState *bs, int64_t sect_num, |
883 |
int sect_count, const char *filename, |
884 |
uint8_t *buffer, bool quiet)
|
885 |
{ |
886 |
int pnum, ret = 0; |
887 |
ret = bdrv_read(bs, sect_num, buffer, sect_count); |
888 |
if (ret < 0) { |
889 |
error_report("Error while reading offset %" PRId64 " of %s: %s", |
890 |
sectors_to_bytes(sect_num), filename, strerror(-ret)); |
891 |
return ret;
|
892 |
} |
893 |
ret = is_allocated_sectors(buffer, sect_count, &pnum); |
894 |
if (ret || pnum != sect_count) {
|
895 |
qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", |
896 |
sectors_to_bytes(ret ? sect_num : sect_num + pnum)); |
897 |
return 1; |
898 |
} |
899 |
|
900 |
return 0; |
901 |
} |
902 |
|
903 |
/*
|
904 |
* Compares two images. Exit codes:
|
905 |
*
|
906 |
* 0 - Images are identical
|
907 |
* 1 - Images differ
|
908 |
* >1 - Error occurred
|
909 |
*/
|
910 |
static int img_compare(int argc, char **argv) |
911 |
{ |
912 |
const char *fmt1 = NULL, *fmt2 = NULL, *filename1, *filename2; |
913 |
BlockDriverState *bs1, *bs2; |
914 |
int64_t total_sectors1, total_sectors2; |
915 |
uint8_t *buf1 = NULL, *buf2 = NULL; |
916 |
int pnum1, pnum2;
|
917 |
int allocated1, allocated2;
|
918 |
int ret = 0; /* return value - 0 Ident, 1 Different, >1 Error */ |
919 |
bool progress = false, quiet = false, strict = false; |
920 |
int64_t total_sectors; |
921 |
int64_t sector_num = 0;
|
922 |
int64_t nb_sectors; |
923 |
int c, pnum;
|
924 |
uint64_t bs_sectors; |
925 |
uint64_t progress_base; |
926 |
|
927 |
for (;;) {
|
928 |
c = getopt(argc, argv, "hpf:F:sq");
|
929 |
if (c == -1) { |
930 |
break;
|
931 |
} |
932 |
switch (c) {
|
933 |
case '?': |
934 |
case 'h': |
935 |
help(); |
936 |
break;
|
937 |
case 'f': |
938 |
fmt1 = optarg; |
939 |
break;
|
940 |
case 'F': |
941 |
fmt2 = optarg; |
942 |
break;
|
943 |
case 'p': |
944 |
progress = true;
|
945 |
break;
|
946 |
case 'q': |
947 |
quiet = true;
|
948 |
break;
|
949 |
case 's': |
950 |
strict = true;
|
951 |
break;
|
952 |
} |
953 |
} |
954 |
|
955 |
/* Progress is not shown in Quiet mode */
|
956 |
if (quiet) {
|
957 |
progress = false;
|
958 |
} |
959 |
|
960 |
|
961 |
if (optind != argc - 2) { |
962 |
help(); |
963 |
} |
964 |
filename1 = argv[optind++]; |
965 |
filename2 = argv[optind++]; |
966 |
|
967 |
/* Initialize before goto out */
|
968 |
qemu_progress_init(progress, 2.0); |
969 |
|
970 |
bs1 = bdrv_new_open(filename1, fmt1, BDRV_O_FLAGS, true, quiet);
|
971 |
if (!bs1) {
|
972 |
error_report("Can't open file %s", filename1);
|
973 |
ret = 2;
|
974 |
goto out3;
|
975 |
} |
976 |
|
977 |
bs2 = bdrv_new_open(filename2, fmt2, BDRV_O_FLAGS, true, quiet);
|
978 |
if (!bs2) {
|
979 |
error_report("Can't open file %s", filename2);
|
980 |
ret = 2;
|
981 |
goto out2;
|
982 |
} |
983 |
|
984 |
buf1 = qemu_blockalign(bs1, IO_BUF_SIZE); |
985 |
buf2 = qemu_blockalign(bs2, IO_BUF_SIZE); |
986 |
bdrv_get_geometry(bs1, &bs_sectors); |
987 |
total_sectors1 = bs_sectors; |
988 |
bdrv_get_geometry(bs2, &bs_sectors); |
989 |
total_sectors2 = bs_sectors; |
990 |
total_sectors = MIN(total_sectors1, total_sectors2); |
991 |
progress_base = MAX(total_sectors1, total_sectors2); |
992 |
|
993 |
qemu_progress_print(0, 100); |
994 |
|
995 |
if (strict && total_sectors1 != total_sectors2) {
|
996 |
ret = 1;
|
997 |
qprintf(quiet, "Strict mode: Image size mismatch!\n");
|
998 |
goto out;
|
999 |
} |
1000 |
|
1001 |
for (;;) {
|
1002 |
nb_sectors = sectors_to_process(total_sectors, sector_num); |
1003 |
if (nb_sectors <= 0) { |
1004 |
break;
|
1005 |
} |
1006 |
allocated1 = bdrv_is_allocated_above(bs1, NULL, sector_num, nb_sectors,
|
1007 |
&pnum1); |
1008 |
if (allocated1 < 0) { |
1009 |
ret = 3;
|
1010 |
error_report("Sector allocation test failed for %s", filename1);
|
1011 |
goto out;
|
1012 |
} |
1013 |
|
1014 |
allocated2 = bdrv_is_allocated_above(bs2, NULL, sector_num, nb_sectors,
|
1015 |
&pnum2); |
1016 |
if (allocated2 < 0) { |
1017 |
ret = 3;
|
1018 |
error_report("Sector allocation test failed for %s", filename2);
|
1019 |
goto out;
|
1020 |
} |
1021 |
nb_sectors = MIN(pnum1, pnum2); |
1022 |
|
1023 |
if (allocated1 == allocated2) {
|
1024 |
if (allocated1) {
|
1025 |
ret = bdrv_read(bs1, sector_num, buf1, nb_sectors); |
1026 |
if (ret < 0) { |
1027 |
error_report("Error while reading offset %" PRId64 " of %s:" |
1028 |
" %s", sectors_to_bytes(sector_num), filename1,
|
1029 |
strerror(-ret)); |
1030 |
ret = 4;
|
1031 |
goto out;
|
1032 |
} |
1033 |
ret = bdrv_read(bs2, sector_num, buf2, nb_sectors); |
1034 |
if (ret < 0) { |
1035 |
error_report("Error while reading offset %" PRId64
|
1036 |
" of %s: %s", sectors_to_bytes(sector_num),
|
1037 |
filename2, strerror(-ret)); |
1038 |
ret = 4;
|
1039 |
goto out;
|
1040 |
} |
1041 |
ret = compare_sectors(buf1, buf2, nb_sectors, &pnum); |
1042 |
if (ret || pnum != nb_sectors) {
|
1043 |
qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", |
1044 |
sectors_to_bytes( |
1045 |
ret ? sector_num : sector_num + pnum)); |
1046 |
ret = 1;
|
1047 |
goto out;
|
1048 |
} |
1049 |
} |
1050 |
} else {
|
1051 |
if (strict) {
|
1052 |
ret = 1;
|
1053 |
qprintf(quiet, "Strict mode: Offset %" PRId64
|
1054 |
" allocation mismatch!\n",
|
1055 |
sectors_to_bytes(sector_num)); |
1056 |
goto out;
|
1057 |
} |
1058 |
|
1059 |
if (allocated1) {
|
1060 |
ret = check_empty_sectors(bs1, sector_num, nb_sectors, |
1061 |
filename1, buf1, quiet); |
1062 |
} else {
|
1063 |
ret = check_empty_sectors(bs2, sector_num, nb_sectors, |
1064 |
filename2, buf1, quiet); |
1065 |
} |
1066 |
if (ret) {
|
1067 |
if (ret < 0) { |
1068 |
error_report("Error while reading offset %" PRId64 ": %s", |
1069 |
sectors_to_bytes(sector_num), strerror(-ret)); |
1070 |
ret = 4;
|
1071 |
} |
1072 |
goto out;
|
1073 |
} |
1074 |
} |
1075 |
sector_num += nb_sectors; |
1076 |
qemu_progress_print(((float) nb_sectors / progress_base)*100, 100); |
1077 |
} |
1078 |
|
1079 |
if (total_sectors1 != total_sectors2) {
|
1080 |
BlockDriverState *bs_over; |
1081 |
int64_t total_sectors_over; |
1082 |
const char *filename_over; |
1083 |
|
1084 |
qprintf(quiet, "Warning: Image size mismatch!\n");
|
1085 |
if (total_sectors1 > total_sectors2) {
|
1086 |
total_sectors_over = total_sectors1; |
1087 |
bs_over = bs1; |
1088 |
filename_over = filename1; |
1089 |
} else {
|
1090 |
total_sectors_over = total_sectors2; |
1091 |
bs_over = bs2; |
1092 |
filename_over = filename2; |
1093 |
} |
1094 |
|
1095 |
for (;;) {
|
1096 |
nb_sectors = sectors_to_process(total_sectors_over, sector_num); |
1097 |
if (nb_sectors <= 0) { |
1098 |
break;
|
1099 |
} |
1100 |
ret = bdrv_is_allocated_above(bs_over, NULL, sector_num,
|
1101 |
nb_sectors, &pnum); |
1102 |
if (ret < 0) { |
1103 |
ret = 3;
|
1104 |
error_report("Sector allocation test failed for %s",
|
1105 |
filename_over); |
1106 |
goto out;
|
1107 |
|
1108 |
} |
1109 |
nb_sectors = pnum; |
1110 |
if (ret) {
|
1111 |
ret = check_empty_sectors(bs_over, sector_num, nb_sectors, |
1112 |
filename_over, buf1, quiet); |
1113 |
if (ret) {
|
1114 |
if (ret < 0) { |
1115 |
error_report("Error while reading offset %" PRId64
|
1116 |
" of %s: %s", sectors_to_bytes(sector_num),
|
1117 |
filename_over, strerror(-ret)); |
1118 |
ret = 4;
|
1119 |
} |
1120 |
goto out;
|
1121 |
} |
1122 |
} |
1123 |
sector_num += nb_sectors; |
1124 |
qemu_progress_print(((float) nb_sectors / progress_base)*100, 100); |
1125 |
} |
1126 |
} |
1127 |
|
1128 |
qprintf(quiet, "Images are identical.\n");
|
1129 |
ret = 0;
|
1130 |
|
1131 |
out:
|
1132 |
bdrv_unref(bs2); |
1133 |
qemu_vfree(buf1); |
1134 |
qemu_vfree(buf2); |
1135 |
out2:
|
1136 |
bdrv_unref(bs1); |
1137 |
out3:
|
1138 |
qemu_progress_end(); |
1139 |
return ret;
|
1140 |
} |
1141 |
|
1142 |
static int img_convert(int argc, char **argv) |
1143 |
{ |
1144 |
int c, n, n1, bs_n, bs_i, compress, cluster_sectors, skip_create;
|
1145 |
int64_t ret = 0;
|
1146 |
int progress = 0, flags; |
1147 |
const char *fmt, *out_fmt, *cache, *out_baseimg, *out_filename; |
1148 |
BlockDriver *drv, *proto_drv; |
1149 |
BlockDriverState **bs = NULL, *out_bs = NULL; |
1150 |
int64_t total_sectors, nb_sectors, sector_num, bs_offset; |
1151 |
uint64_t bs_sectors; |
1152 |
uint8_t * buf = NULL;
|
1153 |
size_t bufsectors = IO_BUF_SIZE / BDRV_SECTOR_SIZE; |
1154 |
const uint8_t *buf1;
|
1155 |
BlockDriverInfo bdi; |
1156 |
QEMUOptionParameter *param = NULL, *create_options = NULL; |
1157 |
QEMUOptionParameter *out_baseimg_param; |
1158 |
char *options = NULL; |
1159 |
const char *snapshot_name = NULL; |
1160 |
int min_sparse = 8; /* Need at least 4k of zeros for sparse detection */ |
1161 |
bool quiet = false; |
1162 |
Error *local_err = NULL;
|
1163 |
QemuOpts *sn_opts = NULL;
|
1164 |
|
1165 |
/* Initialize before goto out */
|
1166 |
qemu_progress_init(progress, 1.0); |
1167 |
|
1168 |
fmt = NULL;
|
1169 |
out_fmt = "raw";
|
1170 |
cache = "unsafe";
|
1171 |
out_baseimg = NULL;
|
1172 |
compress = 0;
|
1173 |
skip_create = 0;
|
1174 |
for(;;) {
|
1175 |
c = getopt(argc, argv, "f:O:B:s:hce6o:pS:t:qnl:");
|
1176 |
if (c == -1) { |
1177 |
break;
|
1178 |
} |
1179 |
switch(c) {
|
1180 |
case '?': |
1181 |
case 'h': |
1182 |
help(); |
1183 |
break;
|
1184 |
case 'f': |
1185 |
fmt = optarg; |
1186 |
break;
|
1187 |
case 'O': |
1188 |
out_fmt = optarg; |
1189 |
break;
|
1190 |
case 'B': |
1191 |
out_baseimg = optarg; |
1192 |
break;
|
1193 |
case 'c': |
1194 |
compress = 1;
|
1195 |
break;
|
1196 |
case 'e': |
1197 |
error_report("option -e is deprecated, please use \'-o "
|
1198 |
"encryption\' instead!");
|
1199 |
ret = -1;
|
1200 |
goto out;
|
1201 |
case '6': |
1202 |
error_report("option -6 is deprecated, please use \'-o "
|
1203 |
"compat6\' instead!");
|
1204 |
ret = -1;
|
1205 |
goto out;
|
1206 |
case 'o': |
1207 |
if (!is_valid_option_list(optarg)) {
|
1208 |
error_report("Invalid option list: %s", optarg);
|
1209 |
ret = -1;
|
1210 |
goto out;
|
1211 |
} |
1212 |
if (!options) {
|
1213 |
options = g_strdup(optarg); |
1214 |
} else {
|
1215 |
char *old_options = options;
|
1216 |
options = g_strdup_printf("%s,%s", options, optarg);
|
1217 |
g_free(old_options); |
1218 |
} |
1219 |
break;
|
1220 |
case 's': |
1221 |
snapshot_name = optarg; |
1222 |
break;
|
1223 |
case 'l': |
1224 |
if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { |
1225 |
sn_opts = qemu_opts_parse(&internal_snapshot_opts, optarg, 0);
|
1226 |
if (!sn_opts) {
|
1227 |
error_report("Failed in parsing snapshot param '%s'",
|
1228 |
optarg); |
1229 |
ret = -1;
|
1230 |
goto out;
|
1231 |
} |
1232 |
} else {
|
1233 |
snapshot_name = optarg; |
1234 |
} |
1235 |
break;
|
1236 |
case 'S': |
1237 |
{ |
1238 |
int64_t sval; |
1239 |
char *end;
|
1240 |
sval = strtosz_suffix(optarg, &end, STRTOSZ_DEFSUFFIX_B); |
1241 |
if (sval < 0 || *end) { |
1242 |
error_report("Invalid minimum zero buffer size for sparse output specified");
|
1243 |
ret = -1;
|
1244 |
goto out;
|
1245 |
} |
1246 |
|
1247 |
min_sparse = sval / BDRV_SECTOR_SIZE; |
1248 |
break;
|
1249 |
} |
1250 |
case 'p': |
1251 |
progress = 1;
|
1252 |
break;
|
1253 |
case 't': |
1254 |
cache = optarg; |
1255 |
break;
|
1256 |
case 'q': |
1257 |
quiet = true;
|
1258 |
break;
|
1259 |
case 'n': |
1260 |
skip_create = 1;
|
1261 |
break;
|
1262 |
} |
1263 |
} |
1264 |
|
1265 |
if (quiet) {
|
1266 |
progress = 0;
|
1267 |
} |
1268 |
|
1269 |
bs_n = argc - optind - 1;
|
1270 |
out_filename = bs_n >= 1 ? argv[argc - 1] : NULL; |
1271 |
|
1272 |
if (options && has_help_option(options)) {
|
1273 |
ret = print_block_option_help(out_filename, out_fmt); |
1274 |
goto out;
|
1275 |
} |
1276 |
|
1277 |
if (bs_n < 1) { |
1278 |
help(); |
1279 |
} |
1280 |
|
1281 |
|
1282 |
if (bs_n > 1 && out_baseimg) { |
1283 |
error_report("-B makes no sense when concatenating multiple input "
|
1284 |
"images");
|
1285 |
ret = -1;
|
1286 |
goto out;
|
1287 |
} |
1288 |
|
1289 |
qemu_progress_print(0, 100); |
1290 |
|
1291 |
bs = g_malloc0(bs_n * sizeof(BlockDriverState *));
|
1292 |
|
1293 |
total_sectors = 0;
|
1294 |
for (bs_i = 0; bs_i < bs_n; bs_i++) { |
1295 |
bs[bs_i] = bdrv_new_open(argv[optind + bs_i], fmt, BDRV_O_FLAGS, true,
|
1296 |
quiet); |
1297 |
if (!bs[bs_i]) {
|
1298 |
error_report("Could not open '%s'", argv[optind + bs_i]);
|
1299 |
ret = -1;
|
1300 |
goto out;
|
1301 |
} |
1302 |
bdrv_get_geometry(bs[bs_i], &bs_sectors); |
1303 |
total_sectors += bs_sectors; |
1304 |
} |
1305 |
|
1306 |
if (sn_opts) {
|
1307 |
ret = bdrv_snapshot_load_tmp(bs[0],
|
1308 |
qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), |
1309 |
qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), |
1310 |
&local_err); |
1311 |
} else if (snapshot_name != NULL) { |
1312 |
if (bs_n > 1) { |
1313 |
error_report("No support for concatenating multiple snapshot");
|
1314 |
ret = -1;
|
1315 |
goto out;
|
1316 |
} |
1317 |
|
1318 |
bdrv_snapshot_load_tmp_by_id_or_name(bs[0], snapshot_name, &local_err);
|
1319 |
} |
1320 |
if (local_err) {
|
1321 |
error_report("Failed to load snapshot: %s",
|
1322 |
error_get_pretty(local_err)); |
1323 |
error_free(local_err); |
1324 |
ret = -1;
|
1325 |
goto out;
|
1326 |
} |
1327 |
|
1328 |
/* Find driver and parse its options */
|
1329 |
drv = bdrv_find_format(out_fmt); |
1330 |
if (!drv) {
|
1331 |
error_report("Unknown file format '%s'", out_fmt);
|
1332 |
ret = -1;
|
1333 |
goto out;
|
1334 |
} |
1335 |
|
1336 |
proto_drv = bdrv_find_protocol(out_filename, true);
|
1337 |
if (!proto_drv) {
|
1338 |
error_report("Unknown protocol '%s'", out_filename);
|
1339 |
ret = -1;
|
1340 |
goto out;
|
1341 |
} |
1342 |
|
1343 |
create_options = append_option_parameters(create_options, |
1344 |
drv->create_options); |
1345 |
create_options = append_option_parameters(create_options, |
1346 |
proto_drv->create_options); |
1347 |
|
1348 |
if (options) {
|
1349 |
param = parse_option_parameters(options, create_options, param); |
1350 |
if (param == NULL) { |
1351 |
error_report("Invalid options for file format '%s'.", out_fmt);
|
1352 |
ret = -1;
|
1353 |
goto out;
|
1354 |
} |
1355 |
} else {
|
1356 |
param = parse_option_parameters("", create_options, param);
|
1357 |
} |
1358 |
|
1359 |
set_option_parameter_int(param, BLOCK_OPT_SIZE, total_sectors * 512);
|
1360 |
ret = add_old_style_options(out_fmt, param, out_baseimg, NULL);
|
1361 |
if (ret < 0) { |
1362 |
goto out;
|
1363 |
} |
1364 |
|
1365 |
/* Get backing file name if -o backing_file was used */
|
1366 |
out_baseimg_param = get_option_parameter(param, BLOCK_OPT_BACKING_FILE); |
1367 |
if (out_baseimg_param) {
|
1368 |
out_baseimg = out_baseimg_param->value.s; |
1369 |
} |
1370 |
|
1371 |
/* Check if compression is supported */
|
1372 |
if (compress) {
|
1373 |
QEMUOptionParameter *encryption = |
1374 |
get_option_parameter(param, BLOCK_OPT_ENCRYPT); |
1375 |
QEMUOptionParameter *preallocation = |
1376 |
get_option_parameter(param, BLOCK_OPT_PREALLOC); |
1377 |
|
1378 |
if (!drv->bdrv_write_compressed) {
|
1379 |
error_report("Compression not supported for this file format");
|
1380 |
ret = -1;
|
1381 |
goto out;
|
1382 |
} |
1383 |
|
1384 |
if (encryption && encryption->value.n) {
|
1385 |
error_report("Compression and encryption not supported at "
|
1386 |
"the same time");
|
1387 |
ret = -1;
|
1388 |
goto out;
|
1389 |
} |
1390 |
|
1391 |
if (preallocation && preallocation->value.s
|
1392 |
&& strcmp(preallocation->value.s, "off"))
|
1393 |
{ |
1394 |
error_report("Compression and preallocation not supported at "
|
1395 |
"the same time");
|
1396 |
ret = -1;
|
1397 |
goto out;
|
1398 |
} |
1399 |
} |
1400 |
|
1401 |
if (!skip_create) {
|
1402 |
/* Create the new image */
|
1403 |
ret = bdrv_create(drv, out_filename, param, &local_err); |
1404 |
if (ret < 0) { |
1405 |
error_report("%s: error while converting %s: %s",
|
1406 |
out_filename, out_fmt, error_get_pretty(local_err)); |
1407 |
error_free(local_err); |
1408 |
goto out;
|
1409 |
} |
1410 |
} |
1411 |
|
1412 |
flags = min_sparse ? (BDRV_O_RDWR | BDRV_O_UNMAP) : BDRV_O_RDWR; |
1413 |
ret = bdrv_parse_cache_flags(cache, &flags); |
1414 |
if (ret < 0) { |
1415 |
error_report("Invalid cache option: %s", cache);
|
1416 |
return -1; |
1417 |
} |
1418 |
|
1419 |
out_bs = bdrv_new_open(out_filename, out_fmt, flags, true, quiet);
|
1420 |
if (!out_bs) {
|
1421 |
ret = -1;
|
1422 |
goto out;
|
1423 |
} |
1424 |
|
1425 |
bs_i = 0;
|
1426 |
bs_offset = 0;
|
1427 |
bdrv_get_geometry(bs[0], &bs_sectors);
|
1428 |
|
1429 |
/* increase bufsectors from the default 4096 (2M) if opt_transfer_length
|
1430 |
* or discard_alignment of the out_bs is greater. Limit to 32768 (16MB)
|
1431 |
* as maximum. */
|
1432 |
bufsectors = MIN(32768,
|
1433 |
MAX(bufsectors, MAX(out_bs->bl.opt_transfer_length, |
1434 |
out_bs->bl.discard_alignment)) |
1435 |
); |
1436 |
|
1437 |
buf = qemu_blockalign(out_bs, bufsectors * BDRV_SECTOR_SIZE); |
1438 |
|
1439 |
if (skip_create) {
|
1440 |
int64_t output_length = bdrv_getlength(out_bs); |
1441 |
if (output_length < 0) { |
1442 |
error_report("unable to get output image length: %s\n",
|
1443 |
strerror(-output_length)); |
1444 |
ret = -1;
|
1445 |
goto out;
|
1446 |
} else if (output_length < total_sectors << BDRV_SECTOR_BITS) { |
1447 |
error_report("output file is smaller than input file");
|
1448 |
ret = -1;
|
1449 |
goto out;
|
1450 |
} |
1451 |
} |
1452 |
|
1453 |
cluster_sectors = 0;
|
1454 |
ret = bdrv_get_info(out_bs, &bdi); |
1455 |
if (ret < 0) { |
1456 |
if (compress) {
|
1457 |
error_report("could not get block driver info");
|
1458 |
goto out;
|
1459 |
} |
1460 |
} else {
|
1461 |
cluster_sectors = bdi.cluster_size / BDRV_SECTOR_SIZE; |
1462 |
} |
1463 |
|
1464 |
if (compress) {
|
1465 |
if (cluster_sectors <= 0 || cluster_sectors > bufsectors) { |
1466 |
error_report("invalid cluster size");
|
1467 |
ret = -1;
|
1468 |
goto out;
|
1469 |
} |
1470 |
sector_num = 0;
|
1471 |
|
1472 |
nb_sectors = total_sectors; |
1473 |
|
1474 |
for(;;) {
|
1475 |
int64_t bs_num; |
1476 |
int remainder;
|
1477 |
uint8_t *buf2; |
1478 |
|
1479 |
nb_sectors = total_sectors - sector_num; |
1480 |
if (nb_sectors <= 0) |
1481 |
break;
|
1482 |
if (nb_sectors >= cluster_sectors)
|
1483 |
n = cluster_sectors; |
1484 |
else
|
1485 |
n = nb_sectors; |
1486 |
|
1487 |
bs_num = sector_num - bs_offset; |
1488 |
assert (bs_num >= 0);
|
1489 |
remainder = n; |
1490 |
buf2 = buf; |
1491 |
while (remainder > 0) { |
1492 |
int nlow;
|
1493 |
while (bs_num == bs_sectors) {
|
1494 |
bs_i++; |
1495 |
assert (bs_i < bs_n); |
1496 |
bs_offset += bs_sectors; |
1497 |
bdrv_get_geometry(bs[bs_i], &bs_sectors); |
1498 |
bs_num = 0;
|
1499 |
/* printf("changing part: sector_num=%" PRId64 ", "
|
1500 |
"bs_i=%d, bs_offset=%" PRId64 ", bs_sectors=%" PRId64
|
1501 |
"\n", sector_num, bs_i, bs_offset, bs_sectors); */
|
1502 |
} |
1503 |
assert (bs_num < bs_sectors); |
1504 |
|
1505 |
nlow = (remainder > bs_sectors - bs_num) ? bs_sectors - bs_num : remainder; |
1506 |
|
1507 |
ret = bdrv_read(bs[bs_i], bs_num, buf2, nlow); |
1508 |
if (ret < 0) { |
1509 |
error_report("error while reading sector %" PRId64 ": %s", |
1510 |
bs_num, strerror(-ret)); |
1511 |
goto out;
|
1512 |
} |
1513 |
|
1514 |
buf2 += nlow * 512;
|
1515 |
bs_num += nlow; |
1516 |
|
1517 |
remainder -= nlow; |
1518 |
} |
1519 |
assert (remainder == 0);
|
1520 |
|
1521 |
if (!buffer_is_zero(buf, n * BDRV_SECTOR_SIZE)) {
|
1522 |
ret = bdrv_write_compressed(out_bs, sector_num, buf, n); |
1523 |
if (ret != 0) { |
1524 |
error_report("error while compressing sector %" PRId64
|
1525 |
": %s", sector_num, strerror(-ret));
|
1526 |
goto out;
|
1527 |
} |
1528 |
} |
1529 |
sector_num += n; |
1530 |
qemu_progress_print(100.0 * sector_num / total_sectors, 0); |
1531 |
} |
1532 |
/* signal EOF to align */
|
1533 |
bdrv_write_compressed(out_bs, 0, NULL, 0); |
1534 |
} else {
|
1535 |
int64_t sectors_to_read, sectors_read, sector_num_next_status; |
1536 |
bool count_allocated_sectors;
|
1537 |
int has_zero_init = min_sparse ? bdrv_has_zero_init(out_bs) : 0; |
1538 |
|
1539 |
if (!has_zero_init && bdrv_can_write_zeroes_with_unmap(out_bs)) {
|
1540 |
ret = bdrv_make_zero(out_bs, BDRV_REQ_MAY_UNMAP); |
1541 |
if (ret < 0) { |
1542 |
goto out;
|
1543 |
} |
1544 |
has_zero_init = 1;
|
1545 |
} |
1546 |
|
1547 |
sectors_to_read = total_sectors; |
1548 |
count_allocated_sectors = progress && (out_baseimg || has_zero_init); |
1549 |
restart:
|
1550 |
sector_num = 0; // total number of sectors converted so far |
1551 |
sectors_read = 0;
|
1552 |
sector_num_next_status = 0;
|
1553 |
|
1554 |
for(;;) {
|
1555 |
nb_sectors = total_sectors - sector_num; |
1556 |
if (nb_sectors <= 0) { |
1557 |
if (count_allocated_sectors) {
|
1558 |
sectors_to_read = sectors_read; |
1559 |
count_allocated_sectors = false;
|
1560 |
goto restart;
|
1561 |
} |
1562 |
ret = 0;
|
1563 |
break;
|
1564 |
} |
1565 |
|
1566 |
while (sector_num - bs_offset >= bs_sectors) {
|
1567 |
bs_i ++; |
1568 |
assert (bs_i < bs_n); |
1569 |
bs_offset += bs_sectors; |
1570 |
bdrv_get_geometry(bs[bs_i], &bs_sectors); |
1571 |
/* printf("changing part: sector_num=%" PRId64 ", bs_i=%d, "
|
1572 |
"bs_offset=%" PRId64 ", bs_sectors=%" PRId64 "\n",
|
1573 |
sector_num, bs_i, bs_offset, bs_sectors); */
|
1574 |
} |
1575 |
|
1576 |
if ((out_baseimg || has_zero_init) &&
|
1577 |
sector_num >= sector_num_next_status) { |
1578 |
n = nb_sectors > INT_MAX ? INT_MAX : nb_sectors; |
1579 |
ret = bdrv_get_block_status(bs[bs_i], sector_num - bs_offset, |
1580 |
n, &n1); |
1581 |
if (ret < 0) { |
1582 |
error_report("error while reading block status of sector %"
|
1583 |
PRId64 ": %s", sector_num - bs_offset,
|
1584 |
strerror(-ret)); |
1585 |
goto out;
|
1586 |
} |
1587 |
/* If the output image is zero initialized, we are not working
|
1588 |
* on a shared base and the input is zero we can skip the next
|
1589 |
* n1 sectors */
|
1590 |
if (has_zero_init && !out_baseimg && (ret & BDRV_BLOCK_ZERO)) {
|
1591 |
sector_num += n1; |
1592 |
continue;
|
1593 |
} |
1594 |
/* If the output image is being created as a copy on write
|
1595 |
* image, assume that sectors which are unallocated in the
|
1596 |
* input image are present in both the output's and input's
|
1597 |
* base images (no need to copy them). */
|
1598 |
if (out_baseimg) {
|
1599 |
if (!(ret & BDRV_BLOCK_DATA)) {
|
1600 |
sector_num += n1; |
1601 |
continue;
|
1602 |
} |
1603 |
/* The next 'n1' sectors are allocated in the input image.
|
1604 |
* Copy only those as they may be followed by unallocated
|
1605 |
* sectors. */
|
1606 |
nb_sectors = n1; |
1607 |
} |
1608 |
/* avoid redundant callouts to get_block_status */
|
1609 |
sector_num_next_status = sector_num + n1; |
1610 |
} |
1611 |
|
1612 |
n = MIN(nb_sectors, bufsectors); |
1613 |
|
1614 |
/* round down request length to an aligned sector, but
|
1615 |
* do not bother doing this on short requests. They happen
|
1616 |
* when we found an all-zero area, and the next sector to
|
1617 |
* write will not be sector_num + n. */
|
1618 |
if (cluster_sectors > 0 && n >= cluster_sectors) { |
1619 |
int64_t next_aligned_sector = (sector_num + n); |
1620 |
next_aligned_sector -= next_aligned_sector % cluster_sectors; |
1621 |
if (sector_num + n > next_aligned_sector) {
|
1622 |
n = next_aligned_sector - sector_num; |
1623 |
} |
1624 |
} |
1625 |
|
1626 |
n = MIN(n, bs_sectors - (sector_num - bs_offset)); |
1627 |
|
1628 |
sectors_read += n; |
1629 |
if (count_allocated_sectors) {
|
1630 |
sector_num += n; |
1631 |
continue;
|
1632 |
} |
1633 |
|
1634 |
n1 = n; |
1635 |
ret = bdrv_read(bs[bs_i], sector_num - bs_offset, buf, n); |
1636 |
if (ret < 0) { |
1637 |
error_report("error while reading sector %" PRId64 ": %s", |
1638 |
sector_num - bs_offset, strerror(-ret)); |
1639 |
goto out;
|
1640 |
} |
1641 |
/* NOTE: at the same time we convert, we do not write zero
|
1642 |
sectors to have a chance to compress the image. Ideally, we
|
1643 |
should add a specific call to have the info to go faster */
|
1644 |
buf1 = buf; |
1645 |
while (n > 0) { |
1646 |
if (!has_zero_init ||
|
1647 |
is_allocated_sectors_min(buf1, n, &n1, min_sparse)) { |
1648 |
ret = bdrv_write(out_bs, sector_num, buf1, n1); |
1649 |
if (ret < 0) { |
1650 |
error_report("error while writing sector %" PRId64
|
1651 |
": %s", sector_num, strerror(-ret));
|
1652 |
goto out;
|
1653 |
} |
1654 |
} |
1655 |
sector_num += n1; |
1656 |
n -= n1; |
1657 |
buf1 += n1 * 512;
|
1658 |
} |
1659 |
qemu_progress_print(100.0 * sectors_read / sectors_to_read, 0); |
1660 |
} |
1661 |
} |
1662 |
out:
|
1663 |
if (!ret) {
|
1664 |
qemu_progress_print(100, 0); |
1665 |
} |
1666 |
qemu_progress_end(); |
1667 |
free_option_parameters(create_options); |
1668 |
free_option_parameters(param); |
1669 |
qemu_vfree(buf); |
1670 |
g_free(options); |
1671 |
if (sn_opts) {
|
1672 |
qemu_opts_del(sn_opts); |
1673 |
} |
1674 |
if (out_bs) {
|
1675 |
bdrv_unref(out_bs); |
1676 |
} |
1677 |
if (bs) {
|
1678 |
for (bs_i = 0; bs_i < bs_n; bs_i++) { |
1679 |
if (bs[bs_i]) {
|
1680 |
bdrv_unref(bs[bs_i]); |
1681 |
} |
1682 |
} |
1683 |
g_free(bs); |
1684 |
} |
1685 |
if (ret) {
|
1686 |
return 1; |
1687 |
} |
1688 |
return 0; |
1689 |
} |
1690 |
|
1691 |
|
1692 |
static void dump_snapshots(BlockDriverState *bs) |
1693 |
{ |
1694 |
QEMUSnapshotInfo *sn_tab, *sn; |
1695 |
int nb_sns, i;
|
1696 |
|
1697 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
1698 |
if (nb_sns <= 0) |
1699 |
return;
|
1700 |
printf("Snapshot list:\n");
|
1701 |
bdrv_snapshot_dump(fprintf, stdout, NULL);
|
1702 |
printf("\n");
|
1703 |
for(i = 0; i < nb_sns; i++) { |
1704 |
sn = &sn_tab[i]; |
1705 |
bdrv_snapshot_dump(fprintf, stdout, sn); |
1706 |
printf("\n");
|
1707 |
} |
1708 |
g_free(sn_tab); |
1709 |
} |
1710 |
|
1711 |
static void dump_json_image_info_list(ImageInfoList *list) |
1712 |
{ |
1713 |
Error *errp = NULL;
|
1714 |
QString *str; |
1715 |
QmpOutputVisitor *ov = qmp_output_visitor_new(); |
1716 |
QObject *obj; |
1717 |
visit_type_ImageInfoList(qmp_output_get_visitor(ov), |
1718 |
&list, NULL, &errp);
|
1719 |
obj = qmp_output_get_qobject(ov); |
1720 |
str = qobject_to_json_pretty(obj); |
1721 |
assert(str != NULL);
|
1722 |
printf("%s\n", qstring_get_str(str));
|
1723 |
qobject_decref(obj); |
1724 |
qmp_output_visitor_cleanup(ov); |
1725 |
QDECREF(str); |
1726 |
} |
1727 |
|
1728 |
static void dump_json_image_info(ImageInfo *info) |
1729 |
{ |
1730 |
Error *errp = NULL;
|
1731 |
QString *str; |
1732 |
QmpOutputVisitor *ov = qmp_output_visitor_new(); |
1733 |
QObject *obj; |
1734 |
visit_type_ImageInfo(qmp_output_get_visitor(ov), |
1735 |
&info, NULL, &errp);
|
1736 |
obj = qmp_output_get_qobject(ov); |
1737 |
str = qobject_to_json_pretty(obj); |
1738 |
assert(str != NULL);
|
1739 |
printf("%s\n", qstring_get_str(str));
|
1740 |
qobject_decref(obj); |
1741 |
qmp_output_visitor_cleanup(ov); |
1742 |
QDECREF(str); |
1743 |
} |
1744 |
|
1745 |
static void dump_human_image_info_list(ImageInfoList *list) |
1746 |
{ |
1747 |
ImageInfoList *elem; |
1748 |
bool delim = false; |
1749 |
|
1750 |
for (elem = list; elem; elem = elem->next) {
|
1751 |
if (delim) {
|
1752 |
printf("\n");
|
1753 |
} |
1754 |
delim = true;
|
1755 |
|
1756 |
bdrv_image_info_dump(fprintf, stdout, elem->value); |
1757 |
} |
1758 |
} |
1759 |
|
1760 |
static gboolean str_equal_func(gconstpointer a, gconstpointer b)
|
1761 |
{ |
1762 |
return strcmp(a, b) == 0; |
1763 |
} |
1764 |
|
1765 |
/**
|
1766 |
* Open an image file chain and return an ImageInfoList
|
1767 |
*
|
1768 |
* @filename: topmost image filename
|
1769 |
* @fmt: topmost image format (may be NULL to autodetect)
|
1770 |
* @chain: true - enumerate entire backing file chain
|
1771 |
* false - only topmost image file
|
1772 |
*
|
1773 |
* Returns a list of ImageInfo objects or NULL if there was an error opening an
|
1774 |
* image file. If there was an error a message will have been printed to
|
1775 |
* stderr.
|
1776 |
*/
|
1777 |
static ImageInfoList *collect_image_info_list(const char *filename, |
1778 |
const char *fmt, |
1779 |
bool chain)
|
1780 |
{ |
1781 |
ImageInfoList *head = NULL;
|
1782 |
ImageInfoList **last = &head; |
1783 |
GHashTable *filenames; |
1784 |
Error *err = NULL;
|
1785 |
|
1786 |
filenames = g_hash_table_new_full(g_str_hash, str_equal_func, NULL, NULL); |
1787 |
|
1788 |
while (filename) {
|
1789 |
BlockDriverState *bs; |
1790 |
ImageInfo *info; |
1791 |
ImageInfoList *elem; |
1792 |
|
1793 |
if (g_hash_table_lookup_extended(filenames, filename, NULL, NULL)) { |
1794 |
error_report("Backing file '%s' creates an infinite loop.",
|
1795 |
filename); |
1796 |
goto err;
|
1797 |
} |
1798 |
g_hash_table_insert(filenames, (gpointer)filename, NULL);
|
1799 |
|
1800 |
bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_NO_BACKING, |
1801 |
false, false); |
1802 |
if (!bs) {
|
1803 |
goto err;
|
1804 |
} |
1805 |
|
1806 |
bdrv_query_image_info(bs, &info, &err); |
1807 |
if (err) {
|
1808 |
error_report("%s", error_get_pretty(err));
|
1809 |
error_free(err); |
1810 |
goto err;
|
1811 |
} |
1812 |
|
1813 |
elem = g_new0(ImageInfoList, 1);
|
1814 |
elem->value = info; |
1815 |
*last = elem; |
1816 |
last = &elem->next; |
1817 |
|
1818 |
bdrv_unref(bs); |
1819 |
|
1820 |
filename = fmt = NULL;
|
1821 |
if (chain) {
|
1822 |
if (info->has_full_backing_filename) {
|
1823 |
filename = info->full_backing_filename; |
1824 |
} else if (info->has_backing_filename) { |
1825 |
filename = info->backing_filename; |
1826 |
} |
1827 |
if (info->has_backing_filename_format) {
|
1828 |
fmt = info->backing_filename_format; |
1829 |
} |
1830 |
} |
1831 |
} |
1832 |
g_hash_table_destroy(filenames); |
1833 |
return head;
|
1834 |
|
1835 |
err:
|
1836 |
qapi_free_ImageInfoList(head); |
1837 |
g_hash_table_destroy(filenames); |
1838 |
return NULL; |
1839 |
} |
1840 |
|
1841 |
static int img_info(int argc, char **argv) |
1842 |
{ |
1843 |
int c;
|
1844 |
OutputFormat output_format = OFORMAT_HUMAN; |
1845 |
bool chain = false; |
1846 |
const char *filename, *fmt, *output; |
1847 |
ImageInfoList *list; |
1848 |
|
1849 |
fmt = NULL;
|
1850 |
output = NULL;
|
1851 |
for(;;) {
|
1852 |
int option_index = 0; |
1853 |
static const struct option long_options[] = { |
1854 |
{"help", no_argument, 0, 'h'}, |
1855 |
{"format", required_argument, 0, 'f'}, |
1856 |
{"output", required_argument, 0, OPTION_OUTPUT}, |
1857 |
{"backing-chain", no_argument, 0, OPTION_BACKING_CHAIN}, |
1858 |
{0, 0, 0, 0} |
1859 |
}; |
1860 |
c = getopt_long(argc, argv, "f:h",
|
1861 |
long_options, &option_index); |
1862 |
if (c == -1) { |
1863 |
break;
|
1864 |
} |
1865 |
switch(c) {
|
1866 |
case '?': |
1867 |
case 'h': |
1868 |
help(); |
1869 |
break;
|
1870 |
case 'f': |
1871 |
fmt = optarg; |
1872 |
break;
|
1873 |
case OPTION_OUTPUT:
|
1874 |
output = optarg; |
1875 |
break;
|
1876 |
case OPTION_BACKING_CHAIN:
|
1877 |
chain = true;
|
1878 |
break;
|
1879 |
} |
1880 |
} |
1881 |
if (optind != argc - 1) { |
1882 |
help(); |
1883 |
} |
1884 |
filename = argv[optind++]; |
1885 |
|
1886 |
if (output && !strcmp(output, "json")) { |
1887 |
output_format = OFORMAT_JSON; |
1888 |
} else if (output && !strcmp(output, "human")) { |
1889 |
output_format = OFORMAT_HUMAN; |
1890 |
} else if (output) { |
1891 |
error_report("--output must be used with human or json as argument.");
|
1892 |
return 1; |
1893 |
} |
1894 |
|
1895 |
list = collect_image_info_list(filename, fmt, chain); |
1896 |
if (!list) {
|
1897 |
return 1; |
1898 |
} |
1899 |
|
1900 |
switch (output_format) {
|
1901 |
case OFORMAT_HUMAN:
|
1902 |
dump_human_image_info_list(list); |
1903 |
break;
|
1904 |
case OFORMAT_JSON:
|
1905 |
if (chain) {
|
1906 |
dump_json_image_info_list(list); |
1907 |
} else {
|
1908 |
dump_json_image_info(list->value); |
1909 |
} |
1910 |
break;
|
1911 |
} |
1912 |
|
1913 |
qapi_free_ImageInfoList(list); |
1914 |
return 0; |
1915 |
} |
1916 |
|
1917 |
|
1918 |
typedef struct MapEntry { |
1919 |
int flags;
|
1920 |
int depth;
|
1921 |
int64_t start; |
1922 |
int64_t length; |
1923 |
int64_t offset; |
1924 |
BlockDriverState *bs; |
1925 |
} MapEntry; |
1926 |
|
1927 |
static void dump_map_entry(OutputFormat output_format, MapEntry *e, |
1928 |
MapEntry *next) |
1929 |
{ |
1930 |
switch (output_format) {
|
1931 |
case OFORMAT_HUMAN:
|
1932 |
if ((e->flags & BDRV_BLOCK_DATA) &&
|
1933 |
!(e->flags & BDRV_BLOCK_OFFSET_VALID)) { |
1934 |
error_report("File contains external, encrypted or compressed clusters.");
|
1935 |
exit(1);
|
1936 |
} |
1937 |
if ((e->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) == BDRV_BLOCK_DATA) {
|
1938 |
printf("%#-16"PRIx64"%#-16"PRIx64"%#-16"PRIx64"%s\n", |
1939 |
e->start, e->length, e->offset, e->bs->filename); |
1940 |
} |
1941 |
/* This format ignores the distinction between 0, ZERO and ZERO|DATA.
|
1942 |
* Modify the flags here to allow more coalescing.
|
1943 |
*/
|
1944 |
if (next &&
|
1945 |
(next->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) != BDRV_BLOCK_DATA) { |
1946 |
next->flags &= ~BDRV_BLOCK_DATA; |
1947 |
next->flags |= BDRV_BLOCK_ZERO; |
1948 |
} |
1949 |
break;
|
1950 |
case OFORMAT_JSON:
|
1951 |
printf("%s{ \"start\": %"PRId64", \"length\": %"PRId64", \"depth\": %d," |
1952 |
" \"zero\": %s, \"data\": %s",
|
1953 |
(e->start == 0 ? "[" : ",\n"), |
1954 |
e->start, e->length, e->depth, |
1955 |
(e->flags & BDRV_BLOCK_ZERO) ? "true" : "false", |
1956 |
(e->flags & BDRV_BLOCK_DATA) ? "true" : "false"); |
1957 |
if (e->flags & BDRV_BLOCK_OFFSET_VALID) {
|
1958 |
printf(", \"offset\": %"PRId64"", e->offset); |
1959 |
} |
1960 |
putchar('}');
|
1961 |
|
1962 |
if (!next) {
|
1963 |
printf("]\n");
|
1964 |
} |
1965 |
break;
|
1966 |
} |
1967 |
} |
1968 |
|
1969 |
static int get_block_status(BlockDriverState *bs, int64_t sector_num, |
1970 |
int nb_sectors, MapEntry *e)
|
1971 |
{ |
1972 |
int64_t ret; |
1973 |
int depth;
|
1974 |
|
1975 |
/* As an optimization, we could cache the current range of unallocated
|
1976 |
* clusters in each file of the chain, and avoid querying the same
|
1977 |
* range repeatedly.
|
1978 |
*/
|
1979 |
|
1980 |
depth = 0;
|
1981 |
for (;;) {
|
1982 |
ret = bdrv_get_block_status(bs, sector_num, nb_sectors, &nb_sectors); |
1983 |
if (ret < 0) { |
1984 |
return ret;
|
1985 |
} |
1986 |
assert(nb_sectors); |
1987 |
if (ret & (BDRV_BLOCK_ZERO|BDRV_BLOCK_DATA)) {
|
1988 |
break;
|
1989 |
} |
1990 |
bs = bs->backing_hd; |
1991 |
if (bs == NULL) { |
1992 |
ret = 0;
|
1993 |
break;
|
1994 |
} |
1995 |
|
1996 |
depth++; |
1997 |
} |
1998 |
|
1999 |
e->start = sector_num * BDRV_SECTOR_SIZE; |
2000 |
e->length = nb_sectors * BDRV_SECTOR_SIZE; |
2001 |
e->flags = ret & ~BDRV_BLOCK_OFFSET_MASK; |
2002 |
e->offset = ret & BDRV_BLOCK_OFFSET_MASK; |
2003 |
e->depth = depth; |
2004 |
e->bs = bs; |
2005 |
return 0; |
2006 |
} |
2007 |
|
2008 |
static int img_map(int argc, char **argv) |
2009 |
{ |
2010 |
int c;
|
2011 |
OutputFormat output_format = OFORMAT_HUMAN; |
2012 |
BlockDriverState *bs; |
2013 |
const char *filename, *fmt, *output; |
2014 |
int64_t length; |
2015 |
MapEntry curr = { .length = 0 }, next;
|
2016 |
int ret = 0; |
2017 |
|
2018 |
fmt = NULL;
|
2019 |
output = NULL;
|
2020 |
for (;;) {
|
2021 |
int option_index = 0; |
2022 |
static const struct option long_options[] = { |
2023 |
{"help", no_argument, 0, 'h'}, |
2024 |
{"format", required_argument, 0, 'f'}, |
2025 |
{"output", required_argument, 0, OPTION_OUTPUT}, |
2026 |
{0, 0, 0, 0} |
2027 |
}; |
2028 |
c = getopt_long(argc, argv, "f:h",
|
2029 |
long_options, &option_index); |
2030 |
if (c == -1) { |
2031 |
break;
|
2032 |
} |
2033 |
switch (c) {
|
2034 |
case '?': |
2035 |
case 'h': |
2036 |
help(); |
2037 |
break;
|
2038 |
case 'f': |
2039 |
fmt = optarg; |
2040 |
break;
|
2041 |
case OPTION_OUTPUT:
|
2042 |
output = optarg; |
2043 |
break;
|
2044 |
} |
2045 |
} |
2046 |
if (optind >= argc) {
|
2047 |
help(); |
2048 |
} |
2049 |
filename = argv[optind++]; |
2050 |
|
2051 |
if (output && !strcmp(output, "json")) { |
2052 |
output_format = OFORMAT_JSON; |
2053 |
} else if (output && !strcmp(output, "human")) { |
2054 |
output_format = OFORMAT_HUMAN; |
2055 |
} else if (output) { |
2056 |
error_report("--output must be used with human or json as argument.");
|
2057 |
return 1; |
2058 |
} |
2059 |
|
2060 |
bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS, true, false); |
2061 |
if (!bs) {
|
2062 |
return 1; |
2063 |
} |
2064 |
|
2065 |
if (output_format == OFORMAT_HUMAN) {
|
2066 |
printf("%-16s%-16s%-16s%s\n", "Offset", "Length", "Mapped to", "File"); |
2067 |
} |
2068 |
|
2069 |
length = bdrv_getlength(bs); |
2070 |
while (curr.start + curr.length < length) {
|
2071 |
int64_t nsectors_left; |
2072 |
int64_t sector_num; |
2073 |
int n;
|
2074 |
|
2075 |
sector_num = (curr.start + curr.length) >> BDRV_SECTOR_BITS; |
2076 |
|
2077 |
/* Probe up to 1 GiB at a time. */
|
2078 |
nsectors_left = DIV_ROUND_UP(length, BDRV_SECTOR_SIZE) - sector_num; |
2079 |
n = MIN(1 << (30 - BDRV_SECTOR_BITS), nsectors_left); |
2080 |
ret = get_block_status(bs, sector_num, n, &next); |
2081 |
|
2082 |
if (ret < 0) { |
2083 |
error_report("Could not read file metadata: %s", strerror(-ret));
|
2084 |
goto out;
|
2085 |
} |
2086 |
|
2087 |
if (curr.length != 0 && curr.flags == next.flags && |
2088 |
curr.depth == next.depth && |
2089 |
((curr.flags & BDRV_BLOCK_OFFSET_VALID) == 0 ||
|
2090 |
curr.offset + curr.length == next.offset)) { |
2091 |
curr.length += next.length; |
2092 |
continue;
|
2093 |
} |
2094 |
|
2095 |
if (curr.length > 0) { |
2096 |
dump_map_entry(output_format, &curr, &next); |
2097 |
} |
2098 |
curr = next; |
2099 |
} |
2100 |
|
2101 |
dump_map_entry(output_format, &curr, NULL);
|
2102 |
|
2103 |
out:
|
2104 |
bdrv_unref(bs); |
2105 |
return ret < 0; |
2106 |
} |
2107 |
|
2108 |
#define SNAPSHOT_LIST 1 |
2109 |
#define SNAPSHOT_CREATE 2 |
2110 |
#define SNAPSHOT_APPLY 3 |
2111 |
#define SNAPSHOT_DELETE 4 |
2112 |
|
2113 |
static int img_snapshot(int argc, char **argv) |
2114 |
{ |
2115 |
BlockDriverState *bs; |
2116 |
QEMUSnapshotInfo sn; |
2117 |
char *filename, *snapshot_name = NULL; |
2118 |
int c, ret = 0, bdrv_oflags; |
2119 |
int action = 0; |
2120 |
qemu_timeval tv; |
2121 |
bool quiet = false; |
2122 |
Error *err = NULL;
|
2123 |
|
2124 |
bdrv_oflags = BDRV_O_FLAGS | BDRV_O_RDWR; |
2125 |
/* Parse commandline parameters */
|
2126 |
for(;;) {
|
2127 |
c = getopt(argc, argv, "la:c:d:hq");
|
2128 |
if (c == -1) { |
2129 |
break;
|
2130 |
} |
2131 |
switch(c) {
|
2132 |
case '?': |
2133 |
case 'h': |
2134 |
help(); |
2135 |
return 0; |
2136 |
case 'l': |
2137 |
if (action) {
|
2138 |
help(); |
2139 |
return 0; |
2140 |
} |
2141 |
action = SNAPSHOT_LIST; |
2142 |
bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */
|
2143 |
break;
|
2144 |
case 'a': |
2145 |
if (action) {
|
2146 |
help(); |
2147 |
return 0; |
2148 |
} |
2149 |
action = SNAPSHOT_APPLY; |
2150 |
snapshot_name = optarg; |
2151 |
break;
|
2152 |
case 'c': |
2153 |
if (action) {
|
2154 |
help(); |
2155 |
return 0; |
2156 |
} |
2157 |
action = SNAPSHOT_CREATE; |
2158 |
snapshot_name = optarg; |
2159 |
break;
|
2160 |
case 'd': |
2161 |
if (action) {
|
2162 |
help(); |
2163 |
return 0; |
2164 |
} |
2165 |
action = SNAPSHOT_DELETE; |
2166 |
snapshot_name = optarg; |
2167 |
break;
|
2168 |
case 'q': |
2169 |
quiet = true;
|
2170 |
break;
|
2171 |
} |
2172 |
} |
2173 |
|
2174 |
if (optind != argc - 1) { |
2175 |
help(); |
2176 |
} |
2177 |
filename = argv[optind++]; |
2178 |
|
2179 |
/* Open the image */
|
2180 |
bs = bdrv_new_open(filename, NULL, bdrv_oflags, true, quiet); |
2181 |
if (!bs) {
|
2182 |
return 1; |
2183 |
} |
2184 |
|
2185 |
/* Perform the requested action */
|
2186 |
switch(action) {
|
2187 |
case SNAPSHOT_LIST:
|
2188 |
dump_snapshots(bs); |
2189 |
break;
|
2190 |
|
2191 |
case SNAPSHOT_CREATE:
|
2192 |
memset(&sn, 0, sizeof(sn)); |
2193 |
pstrcpy(sn.name, sizeof(sn.name), snapshot_name);
|
2194 |
|
2195 |
qemu_gettimeofday(&tv); |
2196 |
sn.date_sec = tv.tv_sec; |
2197 |
sn.date_nsec = tv.tv_usec * 1000;
|
2198 |
|
2199 |
ret = bdrv_snapshot_create(bs, &sn); |
2200 |
if (ret) {
|
2201 |
error_report("Could not create snapshot '%s': %d (%s)",
|
2202 |
snapshot_name, ret, strerror(-ret)); |
2203 |
} |
2204 |
break;
|
2205 |
|
2206 |
case SNAPSHOT_APPLY:
|
2207 |
ret = bdrv_snapshot_goto(bs, snapshot_name); |
2208 |
if (ret) {
|
2209 |
error_report("Could not apply snapshot '%s': %d (%s)",
|
2210 |
snapshot_name, ret, strerror(-ret)); |
2211 |
} |
2212 |
break;
|
2213 |
|
2214 |
case SNAPSHOT_DELETE:
|
2215 |
bdrv_snapshot_delete_by_id_or_name(bs, snapshot_name, &err); |
2216 |
if (err) {
|
2217 |
error_report("Could not delete snapshot '%s': (%s)",
|
2218 |
snapshot_name, error_get_pretty(err)); |
2219 |
error_free(err); |
2220 |
ret = 1;
|
2221 |
} |
2222 |
break;
|
2223 |
} |
2224 |
|
2225 |
/* Cleanup */
|
2226 |
bdrv_unref(bs); |
2227 |
if (ret) {
|
2228 |
return 1; |
2229 |
} |
2230 |
return 0; |
2231 |
} |
2232 |
|
2233 |
static int img_rebase(int argc, char **argv) |
2234 |
{ |
2235 |
BlockDriverState *bs, *bs_old_backing = NULL, *bs_new_backing = NULL; |
2236 |
BlockDriver *old_backing_drv, *new_backing_drv; |
2237 |
char *filename;
|
2238 |
const char *fmt, *cache, *out_basefmt, *out_baseimg; |
2239 |
int c, flags, ret;
|
2240 |
int unsafe = 0; |
2241 |
int progress = 0; |
2242 |
bool quiet = false; |
2243 |
Error *local_err = NULL;
|
2244 |
|
2245 |
/* Parse commandline parameters */
|
2246 |
fmt = NULL;
|
2247 |
cache = BDRV_DEFAULT_CACHE; |
2248 |
out_baseimg = NULL;
|
2249 |
out_basefmt = NULL;
|
2250 |
for(;;) {
|
2251 |
c = getopt(argc, argv, "uhf:F:b:pt:q");
|
2252 |
if (c == -1) { |
2253 |
break;
|
2254 |
} |
2255 |
switch(c) {
|
2256 |
case '?': |
2257 |
case 'h': |
2258 |
help(); |
2259 |
return 0; |
2260 |
case 'f': |
2261 |
fmt = optarg; |
2262 |
break;
|
2263 |
case 'F': |
2264 |
out_basefmt = optarg; |
2265 |
break;
|
2266 |
case 'b': |
2267 |
out_baseimg = optarg; |
2268 |
break;
|
2269 |
case 'u': |
2270 |
unsafe = 1;
|
2271 |
break;
|
2272 |
case 'p': |
2273 |
progress = 1;
|
2274 |
break;
|
2275 |
case 't': |
2276 |
cache = optarg; |
2277 |
break;
|
2278 |
case 'q': |
2279 |
quiet = true;
|
2280 |
break;
|
2281 |
} |
2282 |
} |
2283 |
|
2284 |
if (quiet) {
|
2285 |
progress = 0;
|
2286 |
} |
2287 |
|
2288 |
if ((optind != argc - 1) || (!unsafe && !out_baseimg)) { |
2289 |
help(); |
2290 |
} |
2291 |
filename = argv[optind++]; |
2292 |
|
2293 |
qemu_progress_init(progress, 2.0); |
2294 |
qemu_progress_print(0, 100); |
2295 |
|
2296 |
flags = BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0);
|
2297 |
ret = bdrv_parse_cache_flags(cache, &flags); |
2298 |
if (ret < 0) { |
2299 |
error_report("Invalid cache option: %s", cache);
|
2300 |
return -1; |
2301 |
} |
2302 |
|
2303 |
/*
|
2304 |
* Open the images.
|
2305 |
*
|
2306 |
* Ignore the old backing file for unsafe rebase in case we want to correct
|
2307 |
* the reference to a renamed or moved backing file.
|
2308 |
*/
|
2309 |
bs = bdrv_new_open(filename, fmt, flags, true, quiet);
|
2310 |
if (!bs) {
|
2311 |
return 1; |
2312 |
} |
2313 |
|
2314 |
/* Find the right drivers for the backing files */
|
2315 |
old_backing_drv = NULL;
|
2316 |
new_backing_drv = NULL;
|
2317 |
|
2318 |
if (!unsafe && bs->backing_format[0] != '\0') { |
2319 |
old_backing_drv = bdrv_find_format(bs->backing_format); |
2320 |
if (old_backing_drv == NULL) { |
2321 |
error_report("Invalid format name: '%s'", bs->backing_format);
|
2322 |
ret = -1;
|
2323 |
goto out;
|
2324 |
} |
2325 |
} |
2326 |
|
2327 |
if (out_basefmt != NULL) { |
2328 |
new_backing_drv = bdrv_find_format(out_basefmt); |
2329 |
if (new_backing_drv == NULL) { |
2330 |
error_report("Invalid format name: '%s'", out_basefmt);
|
2331 |
ret = -1;
|
2332 |
goto out;
|
2333 |
} |
2334 |
} |
2335 |
|
2336 |
/* For safe rebasing we need to compare old and new backing file */
|
2337 |
if (unsafe) {
|
2338 |
/* Make the compiler happy */
|
2339 |
bs_old_backing = NULL;
|
2340 |
bs_new_backing = NULL;
|
2341 |
} else {
|
2342 |
char backing_name[1024]; |
2343 |
|
2344 |
bs_old_backing = bdrv_new("old_backing");
|
2345 |
bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name));
|
2346 |
ret = bdrv_open(&bs_old_backing, backing_name, NULL, NULL, BDRV_O_FLAGS, |
2347 |
old_backing_drv, &local_err); |
2348 |
if (ret) {
|
2349 |
error_report("Could not open old backing file '%s': %s",
|
2350 |
backing_name, error_get_pretty(local_err)); |
2351 |
error_free(local_err); |
2352 |
goto out;
|
2353 |
} |
2354 |
if (out_baseimg[0]) { |
2355 |
bs_new_backing = bdrv_new("new_backing");
|
2356 |
ret = bdrv_open(&bs_new_backing, out_baseimg, NULL, NULL, |
2357 |
BDRV_O_FLAGS, new_backing_drv, &local_err); |
2358 |
if (ret) {
|
2359 |
error_report("Could not open new backing file '%s': %s",
|
2360 |
out_baseimg, error_get_pretty(local_err)); |
2361 |
error_free(local_err); |
2362 |
goto out;
|
2363 |
} |
2364 |
} |
2365 |
} |
2366 |
|
2367 |
/*
|
2368 |
* Check each unallocated cluster in the COW file. If it is unallocated,
|
2369 |
* accesses go to the backing file. We must therefore compare this cluster
|
2370 |
* in the old and new backing file, and if they differ we need to copy it
|
2371 |
* from the old backing file into the COW file.
|
2372 |
*
|
2373 |
* If qemu-img crashes during this step, no harm is done. The content of
|
2374 |
* the image is the same as the original one at any time.
|
2375 |
*/
|
2376 |
if (!unsafe) {
|
2377 |
uint64_t num_sectors; |
2378 |
uint64_t old_backing_num_sectors; |
2379 |
uint64_t new_backing_num_sectors = 0;
|
2380 |
uint64_t sector; |
2381 |
int n;
|
2382 |
uint8_t * buf_old; |
2383 |
uint8_t * buf_new; |
2384 |
float local_progress = 0; |
2385 |
|
2386 |
buf_old = qemu_blockalign(bs, IO_BUF_SIZE); |
2387 |
buf_new = qemu_blockalign(bs, IO_BUF_SIZE); |
2388 |
|
2389 |
bdrv_get_geometry(bs, &num_sectors); |
2390 |
bdrv_get_geometry(bs_old_backing, &old_backing_num_sectors); |
2391 |
if (bs_new_backing) {
|
2392 |
bdrv_get_geometry(bs_new_backing, &new_backing_num_sectors); |
2393 |
} |
2394 |
|
2395 |
if (num_sectors != 0) { |
2396 |
local_progress = (float)100 / |
2397 |
(num_sectors / MIN(num_sectors, IO_BUF_SIZE / 512));
|
2398 |
} |
2399 |
|
2400 |
for (sector = 0; sector < num_sectors; sector += n) { |
2401 |
|
2402 |
/* How many sectors can we handle with the next read? */
|
2403 |
if (sector + (IO_BUF_SIZE / 512) <= num_sectors) { |
2404 |
n = (IO_BUF_SIZE / 512);
|
2405 |
} else {
|
2406 |
n = num_sectors - sector; |
2407 |
} |
2408 |
|
2409 |
/* If the cluster is allocated, we don't need to take action */
|
2410 |
ret = bdrv_is_allocated(bs, sector, n, &n); |
2411 |
if (ret < 0) { |
2412 |
error_report("error while reading image metadata: %s",
|
2413 |
strerror(-ret)); |
2414 |
goto out;
|
2415 |
} |
2416 |
if (ret) {
|
2417 |
continue;
|
2418 |
} |
2419 |
|
2420 |
/*
|
2421 |
* Read old and new backing file and take into consideration that
|
2422 |
* backing files may be smaller than the COW image.
|
2423 |
*/
|
2424 |
if (sector >= old_backing_num_sectors) {
|
2425 |
memset(buf_old, 0, n * BDRV_SECTOR_SIZE);
|
2426 |
} else {
|
2427 |
if (sector + n > old_backing_num_sectors) {
|
2428 |
n = old_backing_num_sectors - sector; |
2429 |
} |
2430 |
|
2431 |
ret = bdrv_read(bs_old_backing, sector, buf_old, n); |
2432 |
if (ret < 0) { |
2433 |
error_report("error while reading from old backing file");
|
2434 |
goto out;
|
2435 |
} |
2436 |
} |
2437 |
|
2438 |
if (sector >= new_backing_num_sectors || !bs_new_backing) {
|
2439 |
memset(buf_new, 0, n * BDRV_SECTOR_SIZE);
|
2440 |
} else {
|
2441 |
if (sector + n > new_backing_num_sectors) {
|
2442 |
n = new_backing_num_sectors - sector; |
2443 |
} |
2444 |
|
2445 |
ret = bdrv_read(bs_new_backing, sector, buf_new, n); |
2446 |
if (ret < 0) { |
2447 |
error_report("error while reading from new backing file");
|
2448 |
goto out;
|
2449 |
} |
2450 |
} |
2451 |
|
2452 |
/* If they differ, we need to write to the COW file */
|
2453 |
uint64_t written = 0;
|
2454 |
|
2455 |
while (written < n) {
|
2456 |
int pnum;
|
2457 |
|
2458 |
if (compare_sectors(buf_old + written * 512, |
2459 |
buf_new + written * 512, n - written, &pnum))
|
2460 |
{ |
2461 |
ret = bdrv_write(bs, sector + written, |
2462 |
buf_old + written * 512, pnum);
|
2463 |
if (ret < 0) { |
2464 |
error_report("Error while writing to COW image: %s",
|
2465 |
strerror(-ret)); |
2466 |
goto out;
|
2467 |
} |
2468 |
} |
2469 |
|
2470 |
written += pnum; |
2471 |
} |
2472 |
qemu_progress_print(local_progress, 100);
|
2473 |
} |
2474 |
|
2475 |
qemu_vfree(buf_old); |
2476 |
qemu_vfree(buf_new); |
2477 |
} |
2478 |
|
2479 |
/*
|
2480 |
* Change the backing file. All clusters that are different from the old
|
2481 |
* backing file are overwritten in the COW file now, so the visible content
|
2482 |
* doesn't change when we switch the backing file.
|
2483 |
*/
|
2484 |
if (out_baseimg && *out_baseimg) {
|
2485 |
ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt); |
2486 |
} else {
|
2487 |
ret = bdrv_change_backing_file(bs, NULL, NULL); |
2488 |
} |
2489 |
|
2490 |
if (ret == -ENOSPC) {
|
2491 |
error_report("Could not change the backing file to '%s': No "
|
2492 |
"space left in the file header", out_baseimg);
|
2493 |
} else if (ret < 0) { |
2494 |
error_report("Could not change the backing file to '%s': %s",
|
2495 |
out_baseimg, strerror(-ret)); |
2496 |
} |
2497 |
|
2498 |
qemu_progress_print(100, 0); |
2499 |
/*
|
2500 |
* TODO At this point it is possible to check if any clusters that are
|
2501 |
* allocated in the COW file are the same in the backing file. If so, they
|
2502 |
* could be dropped from the COW file. Don't do this before switching the
|
2503 |
* backing file, in case of a crash this would lead to corruption.
|
2504 |
*/
|
2505 |
out:
|
2506 |
qemu_progress_end(); |
2507 |
/* Cleanup */
|
2508 |
if (!unsafe) {
|
2509 |
if (bs_old_backing != NULL) { |
2510 |
bdrv_unref(bs_old_backing); |
2511 |
} |
2512 |
if (bs_new_backing != NULL) { |
2513 |
bdrv_unref(bs_new_backing); |
2514 |
} |
2515 |
} |
2516 |
|
2517 |
bdrv_unref(bs); |
2518 |
if (ret) {
|
2519 |
return 1; |
2520 |
} |
2521 |
return 0; |
2522 |
} |
2523 |
|
2524 |
static int img_resize(int argc, char **argv) |
2525 |
{ |
2526 |
int c, ret, relative;
|
2527 |
const char *filename, *fmt, *size; |
2528 |
int64_t n, total_size; |
2529 |
bool quiet = false; |
2530 |
BlockDriverState *bs = NULL;
|
2531 |
QemuOpts *param; |
2532 |
static QemuOptsList resize_options = {
|
2533 |
.name = "resize_options",
|
2534 |
.head = QTAILQ_HEAD_INITIALIZER(resize_options.head), |
2535 |
.desc = { |
2536 |
{ |
2537 |
.name = BLOCK_OPT_SIZE, |
2538 |
.type = QEMU_OPT_SIZE, |
2539 |
.help = "Virtual disk size"
|
2540 |
}, { |
2541 |
/* end of list */
|
2542 |
} |
2543 |
}, |
2544 |
}; |
2545 |
|
2546 |
/* Remove size from argv manually so that negative numbers are not treated
|
2547 |
* as options by getopt. */
|
2548 |
if (argc < 3) { |
2549 |
help(); |
2550 |
return 1; |
2551 |
} |
2552 |
|
2553 |
size = argv[--argc]; |
2554 |
|
2555 |
/* Parse getopt arguments */
|
2556 |
fmt = NULL;
|
2557 |
for(;;) {
|
2558 |
c = getopt(argc, argv, "f:hq");
|
2559 |
if (c == -1) { |
2560 |
break;
|
2561 |
} |
2562 |
switch(c) {
|
2563 |
case '?': |
2564 |
case 'h': |
2565 |
help(); |
2566 |
break;
|
2567 |
case 'f': |
2568 |
fmt = optarg; |
2569 |
break;
|
2570 |
case 'q': |
2571 |
quiet = true;
|
2572 |
break;
|
2573 |
} |
2574 |
} |
2575 |
if (optind != argc - 1) { |
2576 |
help(); |
2577 |
} |
2578 |
filename = argv[optind++]; |
2579 |
|
2580 |
/* Choose grow, shrink, or absolute resize mode */
|
2581 |
switch (size[0]) { |
2582 |
case '+': |
2583 |
relative = 1;
|
2584 |
size++; |
2585 |
break;
|
2586 |
case '-': |
2587 |
relative = -1;
|
2588 |
size++; |
2589 |
break;
|
2590 |
default:
|
2591 |
relative = 0;
|
2592 |
break;
|
2593 |
} |
2594 |
|
2595 |
/* Parse size */
|
2596 |
param = qemu_opts_create(&resize_options, NULL, 0, &error_abort); |
2597 |
if (qemu_opt_set(param, BLOCK_OPT_SIZE, size)) {
|
2598 |
/* Error message already printed when size parsing fails */
|
2599 |
ret = -1;
|
2600 |
qemu_opts_del(param); |
2601 |
goto out;
|
2602 |
} |
2603 |
n = qemu_opt_get_size(param, BLOCK_OPT_SIZE, 0);
|
2604 |
qemu_opts_del(param); |
2605 |
|
2606 |
bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR, true, quiet);
|
2607 |
if (!bs) {
|
2608 |
ret = -1;
|
2609 |
goto out;
|
2610 |
} |
2611 |
|
2612 |
if (relative) {
|
2613 |
total_size = bdrv_getlength(bs) + n * relative; |
2614 |
} else {
|
2615 |
total_size = n; |
2616 |
} |
2617 |
if (total_size <= 0) { |
2618 |
error_report("New image size must be positive");
|
2619 |
ret = -1;
|
2620 |
goto out;
|
2621 |
} |
2622 |
|
2623 |
ret = bdrv_truncate(bs, total_size); |
2624 |
switch (ret) {
|
2625 |
case 0: |
2626 |
qprintf(quiet, "Image resized.\n");
|
2627 |
break;
|
2628 |
case -ENOTSUP:
|
2629 |
error_report("This image does not support resize");
|
2630 |
break;
|
2631 |
case -EACCES:
|
2632 |
error_report("Image is read-only");
|
2633 |
break;
|
2634 |
default:
|
2635 |
error_report("Error resizing image (%d)", -ret);
|
2636 |
break;
|
2637 |
} |
2638 |
out:
|
2639 |
if (bs) {
|
2640 |
bdrv_unref(bs); |
2641 |
} |
2642 |
if (ret) {
|
2643 |
return 1; |
2644 |
} |
2645 |
return 0; |
2646 |
} |
2647 |
|
2648 |
static int img_amend(int argc, char **argv) |
2649 |
{ |
2650 |
int c, ret = 0; |
2651 |
char *options = NULL; |
2652 |
QEMUOptionParameter *create_options = NULL, *options_param = NULL; |
2653 |
const char *fmt = NULL, *filename; |
2654 |
bool quiet = false; |
2655 |
BlockDriverState *bs = NULL;
|
2656 |
|
2657 |
for (;;) {
|
2658 |
c = getopt(argc, argv, "hqf:o:");
|
2659 |
if (c == -1) { |
2660 |
break;
|
2661 |
} |
2662 |
|
2663 |
switch (c) {
|
2664 |
case 'h': |
2665 |
case '?': |
2666 |
help(); |
2667 |
break;
|
2668 |
case 'o': |
2669 |
if (!is_valid_option_list(optarg)) {
|
2670 |
error_report("Invalid option list: %s", optarg);
|
2671 |
ret = -1;
|
2672 |
goto out;
|
2673 |
} |
2674 |
if (!options) {
|
2675 |
options = g_strdup(optarg); |
2676 |
} else {
|
2677 |
char *old_options = options;
|
2678 |
options = g_strdup_printf("%s,%s", options, optarg);
|
2679 |
g_free(old_options); |
2680 |
} |
2681 |
break;
|
2682 |
case 'f': |
2683 |
fmt = optarg; |
2684 |
break;
|
2685 |
case 'q': |
2686 |
quiet = true;
|
2687 |
break;
|
2688 |
} |
2689 |
} |
2690 |
|
2691 |
if (!options) {
|
2692 |
help(); |
2693 |
} |
2694 |
|
2695 |
filename = (optind == argc - 1) ? argv[argc - 1] : NULL; |
2696 |
if (fmt && has_help_option(options)) {
|
2697 |
/* If a format is explicitly specified (and possibly no filename is
|
2698 |
* given), print option help here */
|
2699 |
ret = print_block_option_help(filename, fmt); |
2700 |
goto out;
|
2701 |
} |
2702 |
|
2703 |
if (optind != argc - 1) { |
2704 |
help(); |
2705 |
} |
2706 |
|
2707 |
bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR, true, quiet);
|
2708 |
if (!bs) {
|
2709 |
error_report("Could not open image '%s'", filename);
|
2710 |
ret = -1;
|
2711 |
goto out;
|
2712 |
} |
2713 |
|
2714 |
fmt = bs->drv->format_name; |
2715 |
|
2716 |
if (has_help_option(options)) {
|
2717 |
/* If the format was auto-detected, print option help here */
|
2718 |
ret = print_block_option_help(filename, fmt); |
2719 |
goto out;
|
2720 |
} |
2721 |
|
2722 |
create_options = append_option_parameters(create_options, |
2723 |
bs->drv->create_options); |
2724 |
options_param = parse_option_parameters(options, create_options, |
2725 |
options_param); |
2726 |
if (options_param == NULL) { |
2727 |
error_report("Invalid options for file format '%s'", fmt);
|
2728 |
ret = -1;
|
2729 |
goto out;
|
2730 |
} |
2731 |
|
2732 |
ret = bdrv_amend_options(bs, options_param); |
2733 |
if (ret < 0) { |
2734 |
error_report("Error while amending options: %s", strerror(-ret));
|
2735 |
goto out;
|
2736 |
} |
2737 |
|
2738 |
out:
|
2739 |
if (bs) {
|
2740 |
bdrv_unref(bs); |
2741 |
} |
2742 |
free_option_parameters(create_options); |
2743 |
free_option_parameters(options_param); |
2744 |
g_free(options); |
2745 |
|
2746 |
if (ret) {
|
2747 |
return 1; |
2748 |
} |
2749 |
return 0; |
2750 |
} |
2751 |
|
2752 |
static const img_cmd_t img_cmds[] = { |
2753 |
#define DEF(option, callback, arg_string) \
|
2754 |
{ option, callback }, |
2755 |
#include "qemu-img-cmds.h" |
2756 |
#undef DEF
|
2757 |
#undef GEN_DOCS
|
2758 |
{ NULL, NULL, }, |
2759 |
}; |
2760 |
|
2761 |
int main(int argc, char **argv) |
2762 |
{ |
2763 |
const img_cmd_t *cmd;
|
2764 |
const char *cmdname; |
2765 |
|
2766 |
#ifdef CONFIG_POSIX
|
2767 |
signal(SIGPIPE, SIG_IGN); |
2768 |
#endif
|
2769 |
|
2770 |
error_set_progname(argv[0]);
|
2771 |
qemu_init_exec_dir(argv[0]);
|
2772 |
|
2773 |
qemu_init_main_loop(); |
2774 |
bdrv_init(); |
2775 |
if (argc < 2) |
2776 |
help(); |
2777 |
cmdname = argv[1];
|
2778 |
argc--; argv++; |
2779 |
|
2780 |
/* find the command */
|
2781 |
for(cmd = img_cmds; cmd->name != NULL; cmd++) { |
2782 |
if (!strcmp(cmdname, cmd->name)) {
|
2783 |
return cmd->handler(argc, argv);
|
2784 |
} |
2785 |
} |
2786 |
|
2787 |
/* not found */
|
2788 |
help(); |
2789 |
return 0; |
2790 |
} |