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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" |
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#include "qemu/osdep.h" |
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#include "sysemu/sysemu.h" |
32 |
#include "block/block_int.h" |
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#include <getopt.h> |
34 |
#include <stdio.h> |
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|
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#ifdef _WIN32
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#include <windows.h> |
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#endif
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|
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typedef struct img_cmd_t { |
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const char *name; |
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int (*handler)(int argc, char **argv); |
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} img_cmd_t; |
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|
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/* Default to cache=writeback as data integrity is not important for qemu-tcg. */
|
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#define BDRV_O_FLAGS BDRV_O_CACHE_WB
|
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#define BDRV_DEFAULT_CACHE "writeback" |
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|
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static void format_print(void *opaque, const char *name) |
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{ |
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printf(" %s", name);
|
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} |
53 |
|
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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" |
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#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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" and T (terabyte, 1024G) are supported. 'b' is ignored.\n"
|
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" 'output_filename' is the destination disk image filename\n"
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" '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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" '-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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" '-S' indicates the consecutive number of bytes that must contain only zeros\n"
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" for qemu-img to create a sparse image during conversion\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"
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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"
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" '-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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|
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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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} |
111 |
|
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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) |
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{ |
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int c, i;
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printf("Password: ");
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fflush(stdout); |
119 |
i = 0;
|
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for(;;) {
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c = getchar(); |
122 |
if (c == '\n') |
123 |
break;
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if (i < (buf_size - 1)) |
125 |
buf[i++] = c; |
126 |
} |
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buf[i] = '\0';
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return 0; |
129 |
} |
130 |
|
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#else
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|
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#include <termios.h> |
134 |
|
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static struct termios oldtty; |
136 |
|
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static void term_exit(void) |
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{ |
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tcsetattr (0, TCSANOW, &oldtty);
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} |
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|
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static void term_init(void) |
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{ |
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struct termios tty;
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|
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tcgetattr (0, &tty);
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oldtty = tty; |
148 |
|
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tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP |
150 |
|INLCR|IGNCR|ICRNL|IXON); |
151 |
tty.c_oflag |= OPOST; |
152 |
tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN); |
153 |
tty.c_cflag &= ~(CSIZE|PARENB); |
154 |
tty.c_cflag |= CS8; |
155 |
tty.c_cc[VMIN] = 1;
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tty.c_cc[VTIME] = 0;
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|
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tcsetattr (0, TCSANOW, &tty);
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|
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atexit(term_exit); |
161 |
} |
162 |
|
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static int read_password(char *buf, int buf_size) |
164 |
{ |
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uint8_t ch; |
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int i, ret;
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|
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printf("password: ");
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fflush(stdout); |
170 |
term_init(); |
171 |
i = 0;
|
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for(;;) {
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ret = read(0, &ch, 1); |
174 |
if (ret == -1) { |
175 |
if (errno == EAGAIN || errno == EINTR) {
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continue;
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177 |
} else {
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ret = -1;
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break;
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180 |
} |
181 |
} else if (ret == 0) { |
182 |
ret = -1;
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break;
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184 |
} else {
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if (ch == '\r') { |
186 |
ret = 0;
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break;
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188 |
} |
189 |
if (i < (buf_size - 1)) |
190 |
buf[i++] = ch; |
191 |
} |
192 |
} |
193 |
term_exit(); |
194 |
buf[i] = '\0';
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printf("\n");
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return ret;
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} |
198 |
#endif
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|
200 |
static int print_block_option_help(const char *filename, const char *fmt) |
201 |
{ |
202 |
BlockDriver *drv, *proto_drv; |
203 |
QEMUOptionParameter *create_options = NULL;
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204 |
|
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/* Find driver and parse its options */
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206 |
drv = bdrv_find_format(fmt); |
207 |
if (!drv) {
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error_report("Unknown file format '%s'", fmt);
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return 1; |
210 |
} |
211 |
|
212 |
proto_drv = bdrv_find_protocol(filename); |
213 |
if (!proto_drv) {
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error_report("Unknown protocol '%s'", filename);
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return 1; |
216 |
} |
217 |
|
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create_options = append_option_parameters(create_options, |
219 |
drv->create_options); |
220 |
create_options = append_option_parameters(create_options, |
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proto_drv->create_options); |
222 |
print_option_help(create_options); |
223 |
free_option_parameters(create_options); |
224 |
return 0; |
225 |
} |
226 |
|
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static BlockDriverState *bdrv_new_open(const char *filename, |
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const char *fmt, |
229 |
int flags,
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bool require_io)
|
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{ |
232 |
BlockDriverState *bs; |
233 |
BlockDriver *drv; |
234 |
char password[256]; |
235 |
int ret;
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|
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bs = bdrv_new("image");
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|
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if (fmt) {
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drv = bdrv_find_format(fmt); |
241 |
if (!drv) {
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error_report("Unknown file format '%s'", fmt);
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goto fail;
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244 |
} |
245 |
} else {
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drv = NULL;
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} |
248 |
|
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ret = bdrv_open(bs, filename, flags, drv); |
250 |
if (ret < 0) { |
251 |
error_report("Could not open '%s': %s", filename, strerror(-ret));
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goto fail;
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} |
254 |
|
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if (bdrv_is_encrypted(bs) && require_io) {
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printf("Disk image '%s' is encrypted.\n", filename);
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if (read_password(password, sizeof(password)) < 0) { |
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error_report("No password given");
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goto fail;
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} |
261 |
if (bdrv_set_key(bs, password) < 0) { |
262 |
error_report("invalid password");
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goto fail;
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264 |
} |
265 |
} |
266 |
return bs;
|
267 |
fail:
|
268 |
if (bs) {
|
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bdrv_delete(bs); |
270 |
} |
271 |
return NULL; |
272 |
} |
273 |
|
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static int add_old_style_options(const char *fmt, QEMUOptionParameter *list, |
275 |
const char *base_filename, |
276 |
const char *base_fmt) |
277 |
{ |
278 |
if (base_filename) {
|
279 |
if (set_option_parameter(list, BLOCK_OPT_BACKING_FILE, base_filename)) {
|
280 |
error_report("Backing file not supported for file format '%s'",
|
281 |
fmt); |
282 |
return -1; |
283 |
} |
284 |
} |
285 |
if (base_fmt) {
|
286 |
if (set_option_parameter(list, BLOCK_OPT_BACKING_FMT, base_fmt)) {
|
287 |
error_report("Backing file format not supported for file "
|
288 |
"format '%s'", fmt);
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289 |
return -1; |
290 |
} |
291 |
} |
292 |
return 0; |
293 |
} |
294 |
|
295 |
static int img_create(int argc, char **argv) |
296 |
{ |
297 |
int c;
|
298 |
uint64_t img_size = -1;
|
299 |
const char *fmt = "raw"; |
300 |
const char *base_fmt = NULL; |
301 |
const char *filename; |
302 |
const char *base_filename = NULL; |
303 |
char *options = NULL; |
304 |
Error *local_err = NULL;
|
305 |
|
306 |
for(;;) {
|
307 |
c = getopt(argc, argv, "F:b:f:he6o:");
|
308 |
if (c == -1) { |
309 |
break;
|
310 |
} |
311 |
switch(c) {
|
312 |
case '?': |
313 |
case 'h': |
314 |
help(); |
315 |
break;
|
316 |
case 'F': |
317 |
base_fmt = optarg; |
318 |
break;
|
319 |
case 'b': |
320 |
base_filename = optarg; |
321 |
break;
|
322 |
case 'f': |
323 |
fmt = optarg; |
324 |
break;
|
325 |
case 'e': |
326 |
error_report("option -e is deprecated, please use \'-o "
|
327 |
"encryption\' instead!");
|
328 |
return 1; |
329 |
case '6': |
330 |
error_report("option -6 is deprecated, please use \'-o "
|
331 |
"compat6\' instead!");
|
332 |
return 1; |
333 |
case 'o': |
334 |
options = optarg; |
335 |
break;
|
336 |
} |
337 |
} |
338 |
|
339 |
/* Get the filename */
|
340 |
if (optind >= argc) {
|
341 |
help(); |
342 |
} |
343 |
filename = argv[optind++]; |
344 |
|
345 |
/* Get image size, if specified */
|
346 |
if (optind < argc) {
|
347 |
int64_t sval; |
348 |
char *end;
|
349 |
sval = strtosz_suffix(argv[optind++], &end, STRTOSZ_DEFSUFFIX_B); |
350 |
if (sval < 0 || *end) { |
351 |
if (sval == -ERANGE) {
|
352 |
error_report("Image size must be less than 8 EiB!");
|
353 |
} else {
|
354 |
error_report("Invalid image size specified! You may use k, M, "
|
355 |
"G or T suffixes for ");
|
356 |
error_report("kilobytes, megabytes, gigabytes and terabytes.");
|
357 |
} |
358 |
return 1; |
359 |
} |
360 |
img_size = (uint64_t)sval; |
361 |
} |
362 |
|
363 |
if (options && is_help_option(options)) {
|
364 |
return print_block_option_help(filename, fmt);
|
365 |
} |
366 |
|
367 |
bdrv_img_create(filename, fmt, base_filename, base_fmt, |
368 |
options, img_size, BDRV_O_FLAGS, &local_err); |
369 |
if (error_is_set(&local_err)) {
|
370 |
error_report("%s", error_get_pretty(local_err));
|
371 |
error_free(local_err); |
372 |
return 1; |
373 |
} |
374 |
|
375 |
return 0; |
376 |
} |
377 |
|
378 |
/*
|
379 |
* Checks an image for consistency. Exit codes:
|
380 |
*
|
381 |
* 0 - Check completed, image is good
|
382 |
* 1 - Check not completed because of internal errors
|
383 |
* 2 - Check completed, image is corrupted
|
384 |
* 3 - Check completed, image has leaked clusters, but is good otherwise
|
385 |
*/
|
386 |
static int img_check(int argc, char **argv) |
387 |
{ |
388 |
int c, ret;
|
389 |
const char *filename, *fmt; |
390 |
BlockDriverState *bs; |
391 |
BdrvCheckResult result; |
392 |
int fix = 0; |
393 |
int flags = BDRV_O_FLAGS | BDRV_O_CHECK;
|
394 |
|
395 |
fmt = NULL;
|
396 |
for(;;) {
|
397 |
c = getopt(argc, argv, "f:hr:");
|
398 |
if (c == -1) { |
399 |
break;
|
400 |
} |
401 |
switch(c) {
|
402 |
case '?': |
403 |
case 'h': |
404 |
help(); |
405 |
break;
|
406 |
case 'f': |
407 |
fmt = optarg; |
408 |
break;
|
409 |
case 'r': |
410 |
flags |= BDRV_O_RDWR; |
411 |
|
412 |
if (!strcmp(optarg, "leaks")) { |
413 |
fix = BDRV_FIX_LEAKS; |
414 |
} else if (!strcmp(optarg, "all")) { |
415 |
fix = BDRV_FIX_LEAKS | BDRV_FIX_ERRORS; |
416 |
} else {
|
417 |
help(); |
418 |
} |
419 |
break;
|
420 |
} |
421 |
} |
422 |
if (optind >= argc) {
|
423 |
help(); |
424 |
} |
425 |
filename = argv[optind++]; |
426 |
|
427 |
bs = bdrv_new_open(filename, fmt, flags, true);
|
428 |
if (!bs) {
|
429 |
return 1; |
430 |
} |
431 |
ret = bdrv_check(bs, &result, fix); |
432 |
|
433 |
if (ret == -ENOTSUP) {
|
434 |
error_report("This image format does not support checks");
|
435 |
bdrv_delete(bs); |
436 |
return 1; |
437 |
} |
438 |
|
439 |
if (result.corruptions_fixed || result.leaks_fixed) {
|
440 |
printf("The following inconsistencies were found and repaired:\n\n"
|
441 |
" %d leaked clusters\n"
|
442 |
" %d corruptions\n\n"
|
443 |
"Double checking the fixed image now...\n",
|
444 |
result.leaks_fixed, |
445 |
result.corruptions_fixed); |
446 |
ret = bdrv_check(bs, &result, 0);
|
447 |
} |
448 |
|
449 |
if (!(result.corruptions || result.leaks || result.check_errors)) {
|
450 |
printf("No errors were found on the image.\n");
|
451 |
} else {
|
452 |
if (result.corruptions) {
|
453 |
printf("\n%d errors were found on the image.\n"
|
454 |
"Data may be corrupted, or further writes to the image "
|
455 |
"may corrupt it.\n",
|
456 |
result.corruptions); |
457 |
} |
458 |
|
459 |
if (result.leaks) {
|
460 |
printf("\n%d leaked clusters were found on the image.\n"
|
461 |
"This means waste of disk space, but no harm to data.\n",
|
462 |
result.leaks); |
463 |
} |
464 |
|
465 |
if (result.check_errors) {
|
466 |
printf("\n%d internal errors have occurred during the check.\n",
|
467 |
result.check_errors); |
468 |
} |
469 |
} |
470 |
|
471 |
if (result.bfi.total_clusters != 0 && result.bfi.allocated_clusters != 0) { |
472 |
printf("%" PRId64 "/%" PRId64 "= %0.2f%% allocated, %0.2f%% fragmented\n", |
473 |
result.bfi.allocated_clusters, result.bfi.total_clusters, |
474 |
result.bfi.allocated_clusters * 100.0 / result.bfi.total_clusters, |
475 |
result.bfi.fragmented_clusters * 100.0 / result.bfi.allocated_clusters); |
476 |
} |
477 |
|
478 |
bdrv_delete(bs); |
479 |
|
480 |
if (ret < 0 || result.check_errors) { |
481 |
printf("\nAn error has occurred during the check: %s\n"
|
482 |
"The check is not complete and may have missed error.\n",
|
483 |
strerror(-ret)); |
484 |
return 1; |
485 |
} |
486 |
|
487 |
if (result.corruptions) {
|
488 |
return 2; |
489 |
} else if (result.leaks) { |
490 |
return 3; |
491 |
} else {
|
492 |
return 0; |
493 |
} |
494 |
} |
495 |
|
496 |
static int img_commit(int argc, char **argv) |
497 |
{ |
498 |
int c, ret, flags;
|
499 |
const char *filename, *fmt, *cache; |
500 |
BlockDriverState *bs; |
501 |
|
502 |
fmt = NULL;
|
503 |
cache = BDRV_DEFAULT_CACHE; |
504 |
for(;;) {
|
505 |
c = getopt(argc, argv, "f:ht:");
|
506 |
if (c == -1) { |
507 |
break;
|
508 |
} |
509 |
switch(c) {
|
510 |
case '?': |
511 |
case 'h': |
512 |
help(); |
513 |
break;
|
514 |
case 'f': |
515 |
fmt = optarg; |
516 |
break;
|
517 |
case 't': |
518 |
cache = optarg; |
519 |
break;
|
520 |
} |
521 |
} |
522 |
if (optind >= argc) {
|
523 |
help(); |
524 |
} |
525 |
filename = argv[optind++]; |
526 |
|
527 |
flags = BDRV_O_RDWR; |
528 |
ret = bdrv_parse_cache_flags(cache, &flags); |
529 |
if (ret < 0) { |
530 |
error_report("Invalid cache option: %s", cache);
|
531 |
return -1; |
532 |
} |
533 |
|
534 |
bs = bdrv_new_open(filename, fmt, flags, true);
|
535 |
if (!bs) {
|
536 |
return 1; |
537 |
} |
538 |
ret = bdrv_commit(bs); |
539 |
switch(ret) {
|
540 |
case 0: |
541 |
printf("Image committed.\n");
|
542 |
break;
|
543 |
case -ENOENT:
|
544 |
error_report("No disk inserted");
|
545 |
break;
|
546 |
case -EACCES:
|
547 |
error_report("Image is read-only");
|
548 |
break;
|
549 |
case -ENOTSUP:
|
550 |
error_report("Image is already committed");
|
551 |
break;
|
552 |
default:
|
553 |
error_report("Error while committing image");
|
554 |
break;
|
555 |
} |
556 |
|
557 |
bdrv_delete(bs); |
558 |
if (ret) {
|
559 |
return 1; |
560 |
} |
561 |
return 0; |
562 |
} |
563 |
|
564 |
/*
|
565 |
* Returns true iff the first sector pointed to by 'buf' contains at least
|
566 |
* a non-NUL byte.
|
567 |
*
|
568 |
* 'pnum' is set to the number of sectors (including and immediately following
|
569 |
* the first one) that are known to be in the same allocated/unallocated state.
|
570 |
*/
|
571 |
static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) |
572 |
{ |
573 |
bool is_zero;
|
574 |
int i;
|
575 |
|
576 |
if (n <= 0) { |
577 |
*pnum = 0;
|
578 |
return 0; |
579 |
} |
580 |
is_zero = buffer_is_zero(buf, 512);
|
581 |
for(i = 1; i < n; i++) { |
582 |
buf += 512;
|
583 |
if (is_zero != buffer_is_zero(buf, 512)) { |
584 |
break;
|
585 |
} |
586 |
} |
587 |
*pnum = i; |
588 |
return !is_zero;
|
589 |
} |
590 |
|
591 |
/*
|
592 |
* Like is_allocated_sectors, but if the buffer starts with a used sector,
|
593 |
* up to 'min' consecutive sectors containing zeros are ignored. This avoids
|
594 |
* breaking up write requests for only small sparse areas.
|
595 |
*/
|
596 |
static int is_allocated_sectors_min(const uint8_t *buf, int n, int *pnum, |
597 |
int min)
|
598 |
{ |
599 |
int ret;
|
600 |
int num_checked, num_used;
|
601 |
|
602 |
if (n < min) {
|
603 |
min = n; |
604 |
} |
605 |
|
606 |
ret = is_allocated_sectors(buf, n, pnum); |
607 |
if (!ret) {
|
608 |
return ret;
|
609 |
} |
610 |
|
611 |
num_used = *pnum; |
612 |
buf += BDRV_SECTOR_SIZE * *pnum; |
613 |
n -= *pnum; |
614 |
num_checked = num_used; |
615 |
|
616 |
while (n > 0) { |
617 |
ret = is_allocated_sectors(buf, n, pnum); |
618 |
|
619 |
buf += BDRV_SECTOR_SIZE * *pnum; |
620 |
n -= *pnum; |
621 |
num_checked += *pnum; |
622 |
if (ret) {
|
623 |
num_used = num_checked; |
624 |
} else if (*pnum >= min) { |
625 |
break;
|
626 |
} |
627 |
} |
628 |
|
629 |
*pnum = num_used; |
630 |
return 1; |
631 |
} |
632 |
|
633 |
/*
|
634 |
* Compares two buffers sector by sector. Returns 0 if the first sector of both
|
635 |
* buffers matches, non-zero otherwise.
|
636 |
*
|
637 |
* pnum is set to the number of sectors (including and immediately following
|
638 |
* the first one) that are known to have the same comparison result
|
639 |
*/
|
640 |
static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n, |
641 |
int *pnum)
|
642 |
{ |
643 |
int res, i;
|
644 |
|
645 |
if (n <= 0) { |
646 |
*pnum = 0;
|
647 |
return 0; |
648 |
} |
649 |
|
650 |
res = !!memcmp(buf1, buf2, 512);
|
651 |
for(i = 1; i < n; i++) { |
652 |
buf1 += 512;
|
653 |
buf2 += 512;
|
654 |
|
655 |
if (!!memcmp(buf1, buf2, 512) != res) { |
656 |
break;
|
657 |
} |
658 |
} |
659 |
|
660 |
*pnum = i; |
661 |
return res;
|
662 |
} |
663 |
|
664 |
#define IO_BUF_SIZE (2 * 1024 * 1024) |
665 |
|
666 |
static int img_convert(int argc, char **argv) |
667 |
{ |
668 |
int c, ret = 0, n, n1, bs_n, bs_i, compress, cluster_size, cluster_sectors; |
669 |
int progress = 0, flags; |
670 |
const char *fmt, *out_fmt, *cache, *out_baseimg, *out_filename; |
671 |
BlockDriver *drv, *proto_drv; |
672 |
BlockDriverState **bs = NULL, *out_bs = NULL; |
673 |
int64_t total_sectors, nb_sectors, sector_num, bs_offset; |
674 |
uint64_t bs_sectors; |
675 |
uint8_t * buf = NULL;
|
676 |
const uint8_t *buf1;
|
677 |
BlockDriverInfo bdi; |
678 |
QEMUOptionParameter *param = NULL, *create_options = NULL; |
679 |
QEMUOptionParameter *out_baseimg_param; |
680 |
char *options = NULL; |
681 |
const char *snapshot_name = NULL; |
682 |
float local_progress = 0; |
683 |
int min_sparse = 8; /* Need at least 4k of zeros for sparse detection */ |
684 |
|
685 |
fmt = NULL;
|
686 |
out_fmt = "raw";
|
687 |
cache = "unsafe";
|
688 |
out_baseimg = NULL;
|
689 |
compress = 0;
|
690 |
for(;;) {
|
691 |
c = getopt(argc, argv, "f:O:B:s:hce6o:pS:t:");
|
692 |
if (c == -1) { |
693 |
break;
|
694 |
} |
695 |
switch(c) {
|
696 |
case '?': |
697 |
case 'h': |
698 |
help(); |
699 |
break;
|
700 |
case 'f': |
701 |
fmt = optarg; |
702 |
break;
|
703 |
case 'O': |
704 |
out_fmt = optarg; |
705 |
break;
|
706 |
case 'B': |
707 |
out_baseimg = optarg; |
708 |
break;
|
709 |
case 'c': |
710 |
compress = 1;
|
711 |
break;
|
712 |
case 'e': |
713 |
error_report("option -e is deprecated, please use \'-o "
|
714 |
"encryption\' instead!");
|
715 |
return 1; |
716 |
case '6': |
717 |
error_report("option -6 is deprecated, please use \'-o "
|
718 |
"compat6\' instead!");
|
719 |
return 1; |
720 |
case 'o': |
721 |
options = optarg; |
722 |
break;
|
723 |
case 's': |
724 |
snapshot_name = optarg; |
725 |
break;
|
726 |
case 'S': |
727 |
{ |
728 |
int64_t sval; |
729 |
char *end;
|
730 |
sval = strtosz_suffix(optarg, &end, STRTOSZ_DEFSUFFIX_B); |
731 |
if (sval < 0 || *end) { |
732 |
error_report("Invalid minimum zero buffer size for sparse output specified");
|
733 |
return 1; |
734 |
} |
735 |
|
736 |
min_sparse = sval / BDRV_SECTOR_SIZE; |
737 |
break;
|
738 |
} |
739 |
case 'p': |
740 |
progress = 1;
|
741 |
break;
|
742 |
case 't': |
743 |
cache = optarg; |
744 |
break;
|
745 |
} |
746 |
} |
747 |
|
748 |
bs_n = argc - optind - 1;
|
749 |
if (bs_n < 1) { |
750 |
help(); |
751 |
} |
752 |
|
753 |
out_filename = argv[argc - 1];
|
754 |
|
755 |
/* Initialize before goto out */
|
756 |
qemu_progress_init(progress, 2.0); |
757 |
|
758 |
if (options && is_help_option(options)) {
|
759 |
ret = print_block_option_help(out_filename, out_fmt); |
760 |
goto out;
|
761 |
} |
762 |
|
763 |
if (bs_n > 1 && out_baseimg) { |
764 |
error_report("-B makes no sense when concatenating multiple input "
|
765 |
"images");
|
766 |
ret = -1;
|
767 |
goto out;
|
768 |
} |
769 |
|
770 |
qemu_progress_print(0, 100); |
771 |
|
772 |
bs = g_malloc0(bs_n * sizeof(BlockDriverState *));
|
773 |
|
774 |
total_sectors = 0;
|
775 |
for (bs_i = 0; bs_i < bs_n; bs_i++) { |
776 |
bs[bs_i] = bdrv_new_open(argv[optind + bs_i], fmt, BDRV_O_FLAGS, true);
|
777 |
if (!bs[bs_i]) {
|
778 |
error_report("Could not open '%s'", argv[optind + bs_i]);
|
779 |
ret = -1;
|
780 |
goto out;
|
781 |
} |
782 |
bdrv_get_geometry(bs[bs_i], &bs_sectors); |
783 |
total_sectors += bs_sectors; |
784 |
} |
785 |
|
786 |
if (snapshot_name != NULL) { |
787 |
if (bs_n > 1) { |
788 |
error_report("No support for concatenating multiple snapshot");
|
789 |
ret = -1;
|
790 |
goto out;
|
791 |
} |
792 |
if (bdrv_snapshot_load_tmp(bs[0], snapshot_name) < 0) { |
793 |
error_report("Failed to load snapshot");
|
794 |
ret = -1;
|
795 |
goto out;
|
796 |
} |
797 |
} |
798 |
|
799 |
/* Find driver and parse its options */
|
800 |
drv = bdrv_find_format(out_fmt); |
801 |
if (!drv) {
|
802 |
error_report("Unknown file format '%s'", out_fmt);
|
803 |
ret = -1;
|
804 |
goto out;
|
805 |
} |
806 |
|
807 |
proto_drv = bdrv_find_protocol(out_filename); |
808 |
if (!proto_drv) {
|
809 |
error_report("Unknown protocol '%s'", out_filename);
|
810 |
ret = -1;
|
811 |
goto out;
|
812 |
} |
813 |
|
814 |
create_options = append_option_parameters(create_options, |
815 |
drv->create_options); |
816 |
create_options = append_option_parameters(create_options, |
817 |
proto_drv->create_options); |
818 |
|
819 |
if (options) {
|
820 |
param = parse_option_parameters(options, create_options, param); |
821 |
if (param == NULL) { |
822 |
error_report("Invalid options for file format '%s'.", out_fmt);
|
823 |
ret = -1;
|
824 |
goto out;
|
825 |
} |
826 |
} else {
|
827 |
param = parse_option_parameters("", create_options, param);
|
828 |
} |
829 |
|
830 |
set_option_parameter_int(param, BLOCK_OPT_SIZE, total_sectors * 512);
|
831 |
ret = add_old_style_options(out_fmt, param, out_baseimg, NULL);
|
832 |
if (ret < 0) { |
833 |
goto out;
|
834 |
} |
835 |
|
836 |
/* Get backing file name if -o backing_file was used */
|
837 |
out_baseimg_param = get_option_parameter(param, BLOCK_OPT_BACKING_FILE); |
838 |
if (out_baseimg_param) {
|
839 |
out_baseimg = out_baseimg_param->value.s; |
840 |
} |
841 |
|
842 |
/* Check if compression is supported */
|
843 |
if (compress) {
|
844 |
QEMUOptionParameter *encryption = |
845 |
get_option_parameter(param, BLOCK_OPT_ENCRYPT); |
846 |
QEMUOptionParameter *preallocation = |
847 |
get_option_parameter(param, BLOCK_OPT_PREALLOC); |
848 |
|
849 |
if (!drv->bdrv_write_compressed) {
|
850 |
error_report("Compression not supported for this file format");
|
851 |
ret = -1;
|
852 |
goto out;
|
853 |
} |
854 |
|
855 |
if (encryption && encryption->value.n) {
|
856 |
error_report("Compression and encryption not supported at "
|
857 |
"the same time");
|
858 |
ret = -1;
|
859 |
goto out;
|
860 |
} |
861 |
|
862 |
if (preallocation && preallocation->value.s
|
863 |
&& strcmp(preallocation->value.s, "off"))
|
864 |
{ |
865 |
error_report("Compression and preallocation not supported at "
|
866 |
"the same time");
|
867 |
ret = -1;
|
868 |
goto out;
|
869 |
} |
870 |
} |
871 |
|
872 |
/* Create the new image */
|
873 |
ret = bdrv_create(drv, out_filename, param); |
874 |
if (ret < 0) { |
875 |
if (ret == -ENOTSUP) {
|
876 |
error_report("Formatting not supported for file format '%s'",
|
877 |
out_fmt); |
878 |
} else if (ret == -EFBIG) { |
879 |
error_report("The image size is too large for file format '%s'",
|
880 |
out_fmt); |
881 |
} else {
|
882 |
error_report("%s: error while converting %s: %s",
|
883 |
out_filename, out_fmt, strerror(-ret)); |
884 |
} |
885 |
goto out;
|
886 |
} |
887 |
|
888 |
flags = BDRV_O_RDWR; |
889 |
ret = bdrv_parse_cache_flags(cache, &flags); |
890 |
if (ret < 0) { |
891 |
error_report("Invalid cache option: %s", cache);
|
892 |
return -1; |
893 |
} |
894 |
|
895 |
out_bs = bdrv_new_open(out_filename, out_fmt, flags, true);
|
896 |
if (!out_bs) {
|
897 |
ret = -1;
|
898 |
goto out;
|
899 |
} |
900 |
|
901 |
bs_i = 0;
|
902 |
bs_offset = 0;
|
903 |
bdrv_get_geometry(bs[0], &bs_sectors);
|
904 |
buf = qemu_blockalign(out_bs, IO_BUF_SIZE); |
905 |
|
906 |
if (compress) {
|
907 |
ret = bdrv_get_info(out_bs, &bdi); |
908 |
if (ret < 0) { |
909 |
error_report("could not get block driver info");
|
910 |
goto out;
|
911 |
} |
912 |
cluster_size = bdi.cluster_size; |
913 |
if (cluster_size <= 0 || cluster_size > IO_BUF_SIZE) { |
914 |
error_report("invalid cluster size");
|
915 |
ret = -1;
|
916 |
goto out;
|
917 |
} |
918 |
cluster_sectors = cluster_size >> 9;
|
919 |
sector_num = 0;
|
920 |
|
921 |
nb_sectors = total_sectors; |
922 |
if (nb_sectors != 0) { |
923 |
local_progress = (float)100 / |
924 |
(nb_sectors / MIN(nb_sectors, cluster_sectors)); |
925 |
} |
926 |
|
927 |
for(;;) {
|
928 |
int64_t bs_num; |
929 |
int remainder;
|
930 |
uint8_t *buf2; |
931 |
|
932 |
nb_sectors = total_sectors - sector_num; |
933 |
if (nb_sectors <= 0) |
934 |
break;
|
935 |
if (nb_sectors >= cluster_sectors)
|
936 |
n = cluster_sectors; |
937 |
else
|
938 |
n = nb_sectors; |
939 |
|
940 |
bs_num = sector_num - bs_offset; |
941 |
assert (bs_num >= 0);
|
942 |
remainder = n; |
943 |
buf2 = buf; |
944 |
while (remainder > 0) { |
945 |
int nlow;
|
946 |
while (bs_num == bs_sectors) {
|
947 |
bs_i++; |
948 |
assert (bs_i < bs_n); |
949 |
bs_offset += bs_sectors; |
950 |
bdrv_get_geometry(bs[bs_i], &bs_sectors); |
951 |
bs_num = 0;
|
952 |
/* printf("changing part: sector_num=%" PRId64 ", "
|
953 |
"bs_i=%d, bs_offset=%" PRId64 ", bs_sectors=%" PRId64
|
954 |
"\n", sector_num, bs_i, bs_offset, bs_sectors); */
|
955 |
} |
956 |
assert (bs_num < bs_sectors); |
957 |
|
958 |
nlow = (remainder > bs_sectors - bs_num) ? bs_sectors - bs_num : remainder; |
959 |
|
960 |
ret = bdrv_read(bs[bs_i], bs_num, buf2, nlow); |
961 |
if (ret < 0) { |
962 |
error_report("error while reading sector %" PRId64 ": %s", |
963 |
bs_num, strerror(-ret)); |
964 |
goto out;
|
965 |
} |
966 |
|
967 |
buf2 += nlow * 512;
|
968 |
bs_num += nlow; |
969 |
|
970 |
remainder -= nlow; |
971 |
} |
972 |
assert (remainder == 0);
|
973 |
|
974 |
if (n < cluster_sectors) {
|
975 |
memset(buf + n * 512, 0, cluster_size - n * 512); |
976 |
} |
977 |
if (!buffer_is_zero(buf, cluster_size)) {
|
978 |
ret = bdrv_write_compressed(out_bs, sector_num, buf, |
979 |
cluster_sectors); |
980 |
if (ret != 0) { |
981 |
error_report("error while compressing sector %" PRId64
|
982 |
": %s", sector_num, strerror(-ret));
|
983 |
goto out;
|
984 |
} |
985 |
} |
986 |
sector_num += n; |
987 |
qemu_progress_print(local_progress, 100);
|
988 |
} |
989 |
/* signal EOF to align */
|
990 |
bdrv_write_compressed(out_bs, 0, NULL, 0); |
991 |
} else {
|
992 |
int has_zero_init = bdrv_has_zero_init(out_bs);
|
993 |
|
994 |
sector_num = 0; // total number of sectors converted so far |
995 |
nb_sectors = total_sectors - sector_num; |
996 |
if (nb_sectors != 0) { |
997 |
local_progress = (float)100 / |
998 |
(nb_sectors / MIN(nb_sectors, IO_BUF_SIZE / 512));
|
999 |
} |
1000 |
|
1001 |
for(;;) {
|
1002 |
nb_sectors = total_sectors - sector_num; |
1003 |
if (nb_sectors <= 0) { |
1004 |
break;
|
1005 |
} |
1006 |
if (nb_sectors >= (IO_BUF_SIZE / 512)) { |
1007 |
n = (IO_BUF_SIZE / 512);
|
1008 |
} else {
|
1009 |
n = nb_sectors; |
1010 |
} |
1011 |
|
1012 |
while (sector_num - bs_offset >= bs_sectors) {
|
1013 |
bs_i ++; |
1014 |
assert (bs_i < bs_n); |
1015 |
bs_offset += bs_sectors; |
1016 |
bdrv_get_geometry(bs[bs_i], &bs_sectors); |
1017 |
/* printf("changing part: sector_num=%" PRId64 ", bs_i=%d, "
|
1018 |
"bs_offset=%" PRId64 ", bs_sectors=%" PRId64 "\n",
|
1019 |
sector_num, bs_i, bs_offset, bs_sectors); */
|
1020 |
} |
1021 |
|
1022 |
if (n > bs_offset + bs_sectors - sector_num) {
|
1023 |
n = bs_offset + bs_sectors - sector_num; |
1024 |
} |
1025 |
|
1026 |
if (has_zero_init) {
|
1027 |
/* If the output image is being created as a copy on write image,
|
1028 |
assume that sectors which are unallocated in the input image
|
1029 |
are present in both the output's and input's base images (no
|
1030 |
need to copy them). */
|
1031 |
if (out_baseimg) {
|
1032 |
if (!bdrv_is_allocated(bs[bs_i], sector_num - bs_offset,
|
1033 |
n, &n1)) { |
1034 |
sector_num += n1; |
1035 |
continue;
|
1036 |
} |
1037 |
/* The next 'n1' sectors are allocated in the input image. Copy
|
1038 |
only those as they may be followed by unallocated sectors. */
|
1039 |
n = n1; |
1040 |
} |
1041 |
} else {
|
1042 |
n1 = n; |
1043 |
} |
1044 |
|
1045 |
ret = bdrv_read(bs[bs_i], sector_num - bs_offset, buf, n); |
1046 |
if (ret < 0) { |
1047 |
error_report("error while reading sector %" PRId64 ": %s", |
1048 |
sector_num - bs_offset, strerror(-ret)); |
1049 |
goto out;
|
1050 |
} |
1051 |
/* NOTE: at the same time we convert, we do not write zero
|
1052 |
sectors to have a chance to compress the image. Ideally, we
|
1053 |
should add a specific call to have the info to go faster */
|
1054 |
buf1 = buf; |
1055 |
while (n > 0) { |
1056 |
/* If the output image is being created as a copy on write image,
|
1057 |
copy all sectors even the ones containing only NUL bytes,
|
1058 |
because they may differ from the sectors in the base image.
|
1059 |
|
1060 |
If the output is to a host device, we also write out
|
1061 |
sectors that are entirely 0, since whatever data was
|
1062 |
already there is garbage, not 0s. */
|
1063 |
if (!has_zero_init || out_baseimg ||
|
1064 |
is_allocated_sectors_min(buf1, n, &n1, min_sparse)) { |
1065 |
ret = bdrv_write(out_bs, sector_num, buf1, n1); |
1066 |
if (ret < 0) { |
1067 |
error_report("error while writing sector %" PRId64
|
1068 |
": %s", sector_num, strerror(-ret));
|
1069 |
goto out;
|
1070 |
} |
1071 |
} |
1072 |
sector_num += n1; |
1073 |
n -= n1; |
1074 |
buf1 += n1 * 512;
|
1075 |
} |
1076 |
qemu_progress_print(local_progress, 100);
|
1077 |
} |
1078 |
} |
1079 |
out:
|
1080 |
qemu_progress_end(); |
1081 |
free_option_parameters(create_options); |
1082 |
free_option_parameters(param); |
1083 |
qemu_vfree(buf); |
1084 |
if (out_bs) {
|
1085 |
bdrv_delete(out_bs); |
1086 |
} |
1087 |
if (bs) {
|
1088 |
for (bs_i = 0; bs_i < bs_n; bs_i++) { |
1089 |
if (bs[bs_i]) {
|
1090 |
bdrv_delete(bs[bs_i]); |
1091 |
} |
1092 |
} |
1093 |
g_free(bs); |
1094 |
} |
1095 |
if (ret) {
|
1096 |
return 1; |
1097 |
} |
1098 |
return 0; |
1099 |
} |
1100 |
|
1101 |
|
1102 |
static void dump_snapshots(BlockDriverState *bs) |
1103 |
{ |
1104 |
QEMUSnapshotInfo *sn_tab, *sn; |
1105 |
int nb_sns, i;
|
1106 |
char buf[256]; |
1107 |
|
1108 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
1109 |
if (nb_sns <= 0) |
1110 |
return;
|
1111 |
printf("Snapshot list:\n");
|
1112 |
printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
1113 |
for(i = 0; i < nb_sns; i++) { |
1114 |
sn = &sn_tab[i]; |
1115 |
printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
1116 |
} |
1117 |
g_free(sn_tab); |
1118 |
} |
1119 |
|
1120 |
static void dump_json_image_info_list(ImageInfoList *list) |
1121 |
{ |
1122 |
Error *errp = NULL;
|
1123 |
QString *str; |
1124 |
QmpOutputVisitor *ov = qmp_output_visitor_new(); |
1125 |
QObject *obj; |
1126 |
visit_type_ImageInfoList(qmp_output_get_visitor(ov), |
1127 |
&list, NULL, &errp);
|
1128 |
obj = qmp_output_get_qobject(ov); |
1129 |
str = qobject_to_json_pretty(obj); |
1130 |
assert(str != NULL);
|
1131 |
printf("%s\n", qstring_get_str(str));
|
1132 |
qobject_decref(obj); |
1133 |
qmp_output_visitor_cleanup(ov); |
1134 |
QDECREF(str); |
1135 |
} |
1136 |
|
1137 |
static void collect_snapshots(BlockDriverState *bs , ImageInfo *info) |
1138 |
{ |
1139 |
int i, sn_count;
|
1140 |
QEMUSnapshotInfo *sn_tab = NULL;
|
1141 |
SnapshotInfoList *info_list, *cur_item = NULL;
|
1142 |
sn_count = bdrv_snapshot_list(bs, &sn_tab); |
1143 |
|
1144 |
for (i = 0; i < sn_count; i++) { |
1145 |
info->has_snapshots = true;
|
1146 |
info_list = g_new0(SnapshotInfoList, 1);
|
1147 |
|
1148 |
info_list->value = g_new0(SnapshotInfo, 1);
|
1149 |
info_list->value->id = g_strdup(sn_tab[i].id_str); |
1150 |
info_list->value->name = g_strdup(sn_tab[i].name); |
1151 |
info_list->value->vm_state_size = sn_tab[i].vm_state_size; |
1152 |
info_list->value->date_sec = sn_tab[i].date_sec; |
1153 |
info_list->value->date_nsec = sn_tab[i].date_nsec; |
1154 |
info_list->value->vm_clock_sec = sn_tab[i].vm_clock_nsec / 1000000000;
|
1155 |
info_list->value->vm_clock_nsec = sn_tab[i].vm_clock_nsec % 1000000000;
|
1156 |
|
1157 |
/* XXX: waiting for the qapi to support qemu-queue.h types */
|
1158 |
if (!cur_item) {
|
1159 |
info->snapshots = cur_item = info_list; |
1160 |
} else {
|
1161 |
cur_item->next = info_list; |
1162 |
cur_item = info_list; |
1163 |
} |
1164 |
|
1165 |
} |
1166 |
|
1167 |
g_free(sn_tab); |
1168 |
} |
1169 |
|
1170 |
static void dump_json_image_info(ImageInfo *info) |
1171 |
{ |
1172 |
Error *errp = NULL;
|
1173 |
QString *str; |
1174 |
QmpOutputVisitor *ov = qmp_output_visitor_new(); |
1175 |
QObject *obj; |
1176 |
visit_type_ImageInfo(qmp_output_get_visitor(ov), |
1177 |
&info, NULL, &errp);
|
1178 |
obj = qmp_output_get_qobject(ov); |
1179 |
str = qobject_to_json_pretty(obj); |
1180 |
assert(str != NULL);
|
1181 |
printf("%s\n", qstring_get_str(str));
|
1182 |
qobject_decref(obj); |
1183 |
qmp_output_visitor_cleanup(ov); |
1184 |
QDECREF(str); |
1185 |
} |
1186 |
|
1187 |
static void collect_image_info(BlockDriverState *bs, |
1188 |
ImageInfo *info, |
1189 |
const char *filename, |
1190 |
const char *fmt) |
1191 |
{ |
1192 |
uint64_t total_sectors; |
1193 |
char backing_filename[1024]; |
1194 |
char backing_filename2[1024]; |
1195 |
BlockDriverInfo bdi; |
1196 |
|
1197 |
bdrv_get_geometry(bs, &total_sectors); |
1198 |
|
1199 |
info->filename = g_strdup(filename); |
1200 |
info->format = g_strdup(bdrv_get_format_name(bs)); |
1201 |
info->virtual_size = total_sectors * 512;
|
1202 |
info->actual_size = bdrv_get_allocated_file_size(bs); |
1203 |
info->has_actual_size = info->actual_size >= 0;
|
1204 |
if (bdrv_is_encrypted(bs)) {
|
1205 |
info->encrypted = true;
|
1206 |
info->has_encrypted = true;
|
1207 |
} |
1208 |
if (bdrv_get_info(bs, &bdi) >= 0) { |
1209 |
if (bdi.cluster_size != 0) { |
1210 |
info->cluster_size = bdi.cluster_size; |
1211 |
info->has_cluster_size = true;
|
1212 |
} |
1213 |
info->dirty_flag = bdi.is_dirty; |
1214 |
info->has_dirty_flag = true;
|
1215 |
} |
1216 |
bdrv_get_backing_filename(bs, backing_filename, sizeof(backing_filename));
|
1217 |
if (backing_filename[0] != '\0') { |
1218 |
info->backing_filename = g_strdup(backing_filename); |
1219 |
info->has_backing_filename = true;
|
1220 |
bdrv_get_full_backing_filename(bs, backing_filename2, |
1221 |
sizeof(backing_filename2));
|
1222 |
|
1223 |
if (strcmp(backing_filename, backing_filename2) != 0) { |
1224 |
info->full_backing_filename = |
1225 |
g_strdup(backing_filename2); |
1226 |
info->has_full_backing_filename = true;
|
1227 |
} |
1228 |
|
1229 |
if (bs->backing_format[0]) { |
1230 |
info->backing_filename_format = g_strdup(bs->backing_format); |
1231 |
info->has_backing_filename_format = true;
|
1232 |
} |
1233 |
} |
1234 |
} |
1235 |
|
1236 |
static void dump_human_image_info(ImageInfo *info) |
1237 |
{ |
1238 |
char size_buf[128], dsize_buf[128]; |
1239 |
if (!info->has_actual_size) {
|
1240 |
snprintf(dsize_buf, sizeof(dsize_buf), "unavailable"); |
1241 |
} else {
|
1242 |
get_human_readable_size(dsize_buf, sizeof(dsize_buf),
|
1243 |
info->actual_size); |
1244 |
} |
1245 |
get_human_readable_size(size_buf, sizeof(size_buf), info->virtual_size);
|
1246 |
printf("image: %s\n"
|
1247 |
"file format: %s\n"
|
1248 |
"virtual size: %s (%" PRId64 " bytes)\n" |
1249 |
"disk size: %s\n",
|
1250 |
info->filename, info->format, size_buf, |
1251 |
info->virtual_size, |
1252 |
dsize_buf); |
1253 |
|
1254 |
if (info->has_encrypted && info->encrypted) {
|
1255 |
printf("encrypted: yes\n");
|
1256 |
} |
1257 |
|
1258 |
if (info->has_cluster_size) {
|
1259 |
printf("cluster_size: %" PRId64 "\n", info->cluster_size); |
1260 |
} |
1261 |
|
1262 |
if (info->has_dirty_flag && info->dirty_flag) {
|
1263 |
printf("cleanly shut down: no\n");
|
1264 |
} |
1265 |
|
1266 |
if (info->has_backing_filename) {
|
1267 |
printf("backing file: %s", info->backing_filename);
|
1268 |
if (info->has_full_backing_filename) {
|
1269 |
printf(" (actual path: %s)", info->full_backing_filename);
|
1270 |
} |
1271 |
putchar('\n');
|
1272 |
if (info->has_backing_filename_format) {
|
1273 |
printf("backing file format: %s\n", info->backing_filename_format);
|
1274 |
} |
1275 |
} |
1276 |
|
1277 |
if (info->has_snapshots) {
|
1278 |
SnapshotInfoList *elem; |
1279 |
char buf[256]; |
1280 |
|
1281 |
printf("Snapshot list:\n");
|
1282 |
printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
1283 |
|
1284 |
/* Ideally bdrv_snapshot_dump() would operate on SnapshotInfoList but
|
1285 |
* we convert to the block layer's native QEMUSnapshotInfo for now.
|
1286 |
*/
|
1287 |
for (elem = info->snapshots; elem; elem = elem->next) {
|
1288 |
QEMUSnapshotInfo sn = { |
1289 |
.vm_state_size = elem->value->vm_state_size, |
1290 |
.date_sec = elem->value->date_sec, |
1291 |
.date_nsec = elem->value->date_nsec, |
1292 |
.vm_clock_nsec = elem->value->vm_clock_sec * 1000000000ULL +
|
1293 |
elem->value->vm_clock_nsec, |
1294 |
}; |
1295 |
|
1296 |
pstrcpy(sn.id_str, sizeof(sn.id_str), elem->value->id);
|
1297 |
pstrcpy(sn.name, sizeof(sn.name), elem->value->name);
|
1298 |
printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), &sn)); |
1299 |
} |
1300 |
} |
1301 |
} |
1302 |
|
1303 |
static void dump_human_image_info_list(ImageInfoList *list) |
1304 |
{ |
1305 |
ImageInfoList *elem; |
1306 |
bool delim = false; |
1307 |
|
1308 |
for (elem = list; elem; elem = elem->next) {
|
1309 |
if (delim) {
|
1310 |
printf("\n");
|
1311 |
} |
1312 |
delim = true;
|
1313 |
|
1314 |
dump_human_image_info(elem->value); |
1315 |
} |
1316 |
} |
1317 |
|
1318 |
static gboolean str_equal_func(gconstpointer a, gconstpointer b)
|
1319 |
{ |
1320 |
return strcmp(a, b) == 0; |
1321 |
} |
1322 |
|
1323 |
/**
|
1324 |
* Open an image file chain and return an ImageInfoList
|
1325 |
*
|
1326 |
* @filename: topmost image filename
|
1327 |
* @fmt: topmost image format (may be NULL to autodetect)
|
1328 |
* @chain: true - enumerate entire backing file chain
|
1329 |
* false - only topmost image file
|
1330 |
*
|
1331 |
* Returns a list of ImageInfo objects or NULL if there was an error opening an
|
1332 |
* image file. If there was an error a message will have been printed to
|
1333 |
* stderr.
|
1334 |
*/
|
1335 |
static ImageInfoList *collect_image_info_list(const char *filename, |
1336 |
const char *fmt, |
1337 |
bool chain)
|
1338 |
{ |
1339 |
ImageInfoList *head = NULL;
|
1340 |
ImageInfoList **last = &head; |
1341 |
GHashTable *filenames; |
1342 |
|
1343 |
filenames = g_hash_table_new_full(g_str_hash, str_equal_func, NULL, NULL); |
1344 |
|
1345 |
while (filename) {
|
1346 |
BlockDriverState *bs; |
1347 |
ImageInfo *info; |
1348 |
ImageInfoList *elem; |
1349 |
|
1350 |
if (g_hash_table_lookup_extended(filenames, filename, NULL, NULL)) { |
1351 |
error_report("Backing file '%s' creates an infinite loop.",
|
1352 |
filename); |
1353 |
goto err;
|
1354 |
} |
1355 |
g_hash_table_insert(filenames, (gpointer)filename, NULL);
|
1356 |
|
1357 |
bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_NO_BACKING, |
1358 |
false);
|
1359 |
if (!bs) {
|
1360 |
goto err;
|
1361 |
} |
1362 |
|
1363 |
info = g_new0(ImageInfo, 1);
|
1364 |
collect_image_info(bs, info, filename, fmt); |
1365 |
collect_snapshots(bs, info); |
1366 |
|
1367 |
elem = g_new0(ImageInfoList, 1);
|
1368 |
elem->value = info; |
1369 |
*last = elem; |
1370 |
last = &elem->next; |
1371 |
|
1372 |
bdrv_delete(bs); |
1373 |
|
1374 |
filename = fmt = NULL;
|
1375 |
if (chain) {
|
1376 |
if (info->has_full_backing_filename) {
|
1377 |
filename = info->full_backing_filename; |
1378 |
} else if (info->has_backing_filename) { |
1379 |
filename = info->backing_filename; |
1380 |
} |
1381 |
if (info->has_backing_filename_format) {
|
1382 |
fmt = info->backing_filename_format; |
1383 |
} |
1384 |
} |
1385 |
} |
1386 |
g_hash_table_destroy(filenames); |
1387 |
return head;
|
1388 |
|
1389 |
err:
|
1390 |
qapi_free_ImageInfoList(head); |
1391 |
g_hash_table_destroy(filenames); |
1392 |
return NULL; |
1393 |
} |
1394 |
|
1395 |
enum {
|
1396 |
OPTION_OUTPUT = 256,
|
1397 |
OPTION_BACKING_CHAIN = 257,
|
1398 |
}; |
1399 |
|
1400 |
typedef enum OutputFormat { |
1401 |
OFORMAT_JSON, |
1402 |
OFORMAT_HUMAN, |
1403 |
} OutputFormat; |
1404 |
|
1405 |
static int img_info(int argc, char **argv) |
1406 |
{ |
1407 |
int c;
|
1408 |
OutputFormat output_format = OFORMAT_HUMAN; |
1409 |
bool chain = false; |
1410 |
const char *filename, *fmt, *output; |
1411 |
ImageInfoList *list; |
1412 |
|
1413 |
fmt = NULL;
|
1414 |
output = NULL;
|
1415 |
for(;;) {
|
1416 |
int option_index = 0; |
1417 |
static const struct option long_options[] = { |
1418 |
{"help", no_argument, 0, 'h'}, |
1419 |
{"format", required_argument, 0, 'f'}, |
1420 |
{"output", required_argument, 0, OPTION_OUTPUT}, |
1421 |
{"backing-chain", no_argument, 0, OPTION_BACKING_CHAIN}, |
1422 |
{0, 0, 0, 0} |
1423 |
}; |
1424 |
c = getopt_long(argc, argv, "f:h",
|
1425 |
long_options, &option_index); |
1426 |
if (c == -1) { |
1427 |
break;
|
1428 |
} |
1429 |
switch(c) {
|
1430 |
case '?': |
1431 |
case 'h': |
1432 |
help(); |
1433 |
break;
|
1434 |
case 'f': |
1435 |
fmt = optarg; |
1436 |
break;
|
1437 |
case OPTION_OUTPUT:
|
1438 |
output = optarg; |
1439 |
break;
|
1440 |
case OPTION_BACKING_CHAIN:
|
1441 |
chain = true;
|
1442 |
break;
|
1443 |
} |
1444 |
} |
1445 |
if (optind >= argc) {
|
1446 |
help(); |
1447 |
} |
1448 |
filename = argv[optind++]; |
1449 |
|
1450 |
if (output && !strcmp(output, "json")) { |
1451 |
output_format = OFORMAT_JSON; |
1452 |
} else if (output && !strcmp(output, "human")) { |
1453 |
output_format = OFORMAT_HUMAN; |
1454 |
} else if (output) { |
1455 |
error_report("--output must be used with human or json as argument.");
|
1456 |
return 1; |
1457 |
} |
1458 |
|
1459 |
list = collect_image_info_list(filename, fmt, chain); |
1460 |
if (!list) {
|
1461 |
return 1; |
1462 |
} |
1463 |
|
1464 |
switch (output_format) {
|
1465 |
case OFORMAT_HUMAN:
|
1466 |
dump_human_image_info_list(list); |
1467 |
break;
|
1468 |
case OFORMAT_JSON:
|
1469 |
if (chain) {
|
1470 |
dump_json_image_info_list(list); |
1471 |
} else {
|
1472 |
dump_json_image_info(list->value); |
1473 |
} |
1474 |
break;
|
1475 |
} |
1476 |
|
1477 |
qapi_free_ImageInfoList(list); |
1478 |
return 0; |
1479 |
} |
1480 |
|
1481 |
#define SNAPSHOT_LIST 1 |
1482 |
#define SNAPSHOT_CREATE 2 |
1483 |
#define SNAPSHOT_APPLY 3 |
1484 |
#define SNAPSHOT_DELETE 4 |
1485 |
|
1486 |
static int img_snapshot(int argc, char **argv) |
1487 |
{ |
1488 |
BlockDriverState *bs; |
1489 |
QEMUSnapshotInfo sn; |
1490 |
char *filename, *snapshot_name = NULL; |
1491 |
int c, ret = 0, bdrv_oflags; |
1492 |
int action = 0; |
1493 |
qemu_timeval tv; |
1494 |
|
1495 |
bdrv_oflags = BDRV_O_FLAGS | BDRV_O_RDWR; |
1496 |
/* Parse commandline parameters */
|
1497 |
for(;;) {
|
1498 |
c = getopt(argc, argv, "la:c:d:h");
|
1499 |
if (c == -1) { |
1500 |
break;
|
1501 |
} |
1502 |
switch(c) {
|
1503 |
case '?': |
1504 |
case 'h': |
1505 |
help(); |
1506 |
return 0; |
1507 |
case 'l': |
1508 |
if (action) {
|
1509 |
help(); |
1510 |
return 0; |
1511 |
} |
1512 |
action = SNAPSHOT_LIST; |
1513 |
bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */
|
1514 |
break;
|
1515 |
case 'a': |
1516 |
if (action) {
|
1517 |
help(); |
1518 |
return 0; |
1519 |
} |
1520 |
action = SNAPSHOT_APPLY; |
1521 |
snapshot_name = optarg; |
1522 |
break;
|
1523 |
case 'c': |
1524 |
if (action) {
|
1525 |
help(); |
1526 |
return 0; |
1527 |
} |
1528 |
action = SNAPSHOT_CREATE; |
1529 |
snapshot_name = optarg; |
1530 |
break;
|
1531 |
case 'd': |
1532 |
if (action) {
|
1533 |
help(); |
1534 |
return 0; |
1535 |
} |
1536 |
action = SNAPSHOT_DELETE; |
1537 |
snapshot_name = optarg; |
1538 |
break;
|
1539 |
} |
1540 |
} |
1541 |
|
1542 |
if (optind >= argc) {
|
1543 |
help(); |
1544 |
} |
1545 |
filename = argv[optind++]; |
1546 |
|
1547 |
/* Open the image */
|
1548 |
bs = bdrv_new_open(filename, NULL, bdrv_oflags, true); |
1549 |
if (!bs) {
|
1550 |
return 1; |
1551 |
} |
1552 |
|
1553 |
/* Perform the requested action */
|
1554 |
switch(action) {
|
1555 |
case SNAPSHOT_LIST:
|
1556 |
dump_snapshots(bs); |
1557 |
break;
|
1558 |
|
1559 |
case SNAPSHOT_CREATE:
|
1560 |
memset(&sn, 0, sizeof(sn)); |
1561 |
pstrcpy(sn.name, sizeof(sn.name), snapshot_name);
|
1562 |
|
1563 |
qemu_gettimeofday(&tv); |
1564 |
sn.date_sec = tv.tv_sec; |
1565 |
sn.date_nsec = tv.tv_usec * 1000;
|
1566 |
|
1567 |
ret = bdrv_snapshot_create(bs, &sn); |
1568 |
if (ret) {
|
1569 |
error_report("Could not create snapshot '%s': %d (%s)",
|
1570 |
snapshot_name, ret, strerror(-ret)); |
1571 |
} |
1572 |
break;
|
1573 |
|
1574 |
case SNAPSHOT_APPLY:
|
1575 |
ret = bdrv_snapshot_goto(bs, snapshot_name); |
1576 |
if (ret) {
|
1577 |
error_report("Could not apply snapshot '%s': %d (%s)",
|
1578 |
snapshot_name, ret, strerror(-ret)); |
1579 |
} |
1580 |
break;
|
1581 |
|
1582 |
case SNAPSHOT_DELETE:
|
1583 |
ret = bdrv_snapshot_delete(bs, snapshot_name); |
1584 |
if (ret) {
|
1585 |
error_report("Could not delete snapshot '%s': %d (%s)",
|
1586 |
snapshot_name, ret, strerror(-ret)); |
1587 |
} |
1588 |
break;
|
1589 |
} |
1590 |
|
1591 |
/* Cleanup */
|
1592 |
bdrv_delete(bs); |
1593 |
if (ret) {
|
1594 |
return 1; |
1595 |
} |
1596 |
return 0; |
1597 |
} |
1598 |
|
1599 |
static int img_rebase(int argc, char **argv) |
1600 |
{ |
1601 |
BlockDriverState *bs, *bs_old_backing = NULL, *bs_new_backing = NULL; |
1602 |
BlockDriver *old_backing_drv, *new_backing_drv; |
1603 |
char *filename;
|
1604 |
const char *fmt, *cache, *out_basefmt, *out_baseimg; |
1605 |
int c, flags, ret;
|
1606 |
int unsafe = 0; |
1607 |
int progress = 0; |
1608 |
|
1609 |
/* Parse commandline parameters */
|
1610 |
fmt = NULL;
|
1611 |
cache = BDRV_DEFAULT_CACHE; |
1612 |
out_baseimg = NULL;
|
1613 |
out_basefmt = NULL;
|
1614 |
for(;;) {
|
1615 |
c = getopt(argc, argv, "uhf:F:b:pt:");
|
1616 |
if (c == -1) { |
1617 |
break;
|
1618 |
} |
1619 |
switch(c) {
|
1620 |
case '?': |
1621 |
case 'h': |
1622 |
help(); |
1623 |
return 0; |
1624 |
case 'f': |
1625 |
fmt = optarg; |
1626 |
break;
|
1627 |
case 'F': |
1628 |
out_basefmt = optarg; |
1629 |
break;
|
1630 |
case 'b': |
1631 |
out_baseimg = optarg; |
1632 |
break;
|
1633 |
case 'u': |
1634 |
unsafe = 1;
|
1635 |
break;
|
1636 |
case 'p': |
1637 |
progress = 1;
|
1638 |
break;
|
1639 |
case 't': |
1640 |
cache = optarg; |
1641 |
break;
|
1642 |
} |
1643 |
} |
1644 |
|
1645 |
if ((optind >= argc) || (!unsafe && !out_baseimg)) {
|
1646 |
help(); |
1647 |
} |
1648 |
filename = argv[optind++]; |
1649 |
|
1650 |
qemu_progress_init(progress, 2.0); |
1651 |
qemu_progress_print(0, 100); |
1652 |
|
1653 |
flags = BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0);
|
1654 |
ret = bdrv_parse_cache_flags(cache, &flags); |
1655 |
if (ret < 0) { |
1656 |
error_report("Invalid cache option: %s", cache);
|
1657 |
return -1; |
1658 |
} |
1659 |
|
1660 |
/*
|
1661 |
* Open the images.
|
1662 |
*
|
1663 |
* Ignore the old backing file for unsafe rebase in case we want to correct
|
1664 |
* the reference to a renamed or moved backing file.
|
1665 |
*/
|
1666 |
bs = bdrv_new_open(filename, fmt, flags, true);
|
1667 |
if (!bs) {
|
1668 |
return 1; |
1669 |
} |
1670 |
|
1671 |
/* Find the right drivers for the backing files */
|
1672 |
old_backing_drv = NULL;
|
1673 |
new_backing_drv = NULL;
|
1674 |
|
1675 |
if (!unsafe && bs->backing_format[0] != '\0') { |
1676 |
old_backing_drv = bdrv_find_format(bs->backing_format); |
1677 |
if (old_backing_drv == NULL) { |
1678 |
error_report("Invalid format name: '%s'", bs->backing_format);
|
1679 |
ret = -1;
|
1680 |
goto out;
|
1681 |
} |
1682 |
} |
1683 |
|
1684 |
if (out_basefmt != NULL) { |
1685 |
new_backing_drv = bdrv_find_format(out_basefmt); |
1686 |
if (new_backing_drv == NULL) { |
1687 |
error_report("Invalid format name: '%s'", out_basefmt);
|
1688 |
ret = -1;
|
1689 |
goto out;
|
1690 |
} |
1691 |
} |
1692 |
|
1693 |
/* For safe rebasing we need to compare old and new backing file */
|
1694 |
if (unsafe) {
|
1695 |
/* Make the compiler happy */
|
1696 |
bs_old_backing = NULL;
|
1697 |
bs_new_backing = NULL;
|
1698 |
} else {
|
1699 |
char backing_name[1024]; |
1700 |
|
1701 |
bs_old_backing = bdrv_new("old_backing");
|
1702 |
bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name));
|
1703 |
ret = bdrv_open(bs_old_backing, backing_name, BDRV_O_FLAGS, |
1704 |
old_backing_drv); |
1705 |
if (ret) {
|
1706 |
error_report("Could not open old backing file '%s'", backing_name);
|
1707 |
goto out;
|
1708 |
} |
1709 |
if (out_baseimg[0]) { |
1710 |
bs_new_backing = bdrv_new("new_backing");
|
1711 |
ret = bdrv_open(bs_new_backing, out_baseimg, BDRV_O_FLAGS, |
1712 |
new_backing_drv); |
1713 |
if (ret) {
|
1714 |
error_report("Could not open new backing file '%s'",
|
1715 |
out_baseimg); |
1716 |
goto out;
|
1717 |
} |
1718 |
} |
1719 |
} |
1720 |
|
1721 |
/*
|
1722 |
* Check each unallocated cluster in the COW file. If it is unallocated,
|
1723 |
* accesses go to the backing file. We must therefore compare this cluster
|
1724 |
* in the old and new backing file, and if they differ we need to copy it
|
1725 |
* from the old backing file into the COW file.
|
1726 |
*
|
1727 |
* If qemu-img crashes during this step, no harm is done. The content of
|
1728 |
* the image is the same as the original one at any time.
|
1729 |
*/
|
1730 |
if (!unsafe) {
|
1731 |
uint64_t num_sectors; |
1732 |
uint64_t old_backing_num_sectors; |
1733 |
uint64_t new_backing_num_sectors = 0;
|
1734 |
uint64_t sector; |
1735 |
int n;
|
1736 |
uint8_t * buf_old; |
1737 |
uint8_t * buf_new; |
1738 |
float local_progress = 0; |
1739 |
|
1740 |
buf_old = qemu_blockalign(bs, IO_BUF_SIZE); |
1741 |
buf_new = qemu_blockalign(bs, IO_BUF_SIZE); |
1742 |
|
1743 |
bdrv_get_geometry(bs, &num_sectors); |
1744 |
bdrv_get_geometry(bs_old_backing, &old_backing_num_sectors); |
1745 |
if (bs_new_backing) {
|
1746 |
bdrv_get_geometry(bs_new_backing, &new_backing_num_sectors); |
1747 |
} |
1748 |
|
1749 |
if (num_sectors != 0) { |
1750 |
local_progress = (float)100 / |
1751 |
(num_sectors / MIN(num_sectors, IO_BUF_SIZE / 512));
|
1752 |
} |
1753 |
|
1754 |
for (sector = 0; sector < num_sectors; sector += n) { |
1755 |
|
1756 |
/* How many sectors can we handle with the next read? */
|
1757 |
if (sector + (IO_BUF_SIZE / 512) <= num_sectors) { |
1758 |
n = (IO_BUF_SIZE / 512);
|
1759 |
} else {
|
1760 |
n = num_sectors - sector; |
1761 |
} |
1762 |
|
1763 |
/* If the cluster is allocated, we don't need to take action */
|
1764 |
ret = bdrv_is_allocated(bs, sector, n, &n); |
1765 |
if (ret) {
|
1766 |
continue;
|
1767 |
} |
1768 |
|
1769 |
/*
|
1770 |
* Read old and new backing file and take into consideration that
|
1771 |
* backing files may be smaller than the COW image.
|
1772 |
*/
|
1773 |
if (sector >= old_backing_num_sectors) {
|
1774 |
memset(buf_old, 0, n * BDRV_SECTOR_SIZE);
|
1775 |
} else {
|
1776 |
if (sector + n > old_backing_num_sectors) {
|
1777 |
n = old_backing_num_sectors - sector; |
1778 |
} |
1779 |
|
1780 |
ret = bdrv_read(bs_old_backing, sector, buf_old, n); |
1781 |
if (ret < 0) { |
1782 |
error_report("error while reading from old backing file");
|
1783 |
goto out;
|
1784 |
} |
1785 |
} |
1786 |
|
1787 |
if (sector >= new_backing_num_sectors || !bs_new_backing) {
|
1788 |
memset(buf_new, 0, n * BDRV_SECTOR_SIZE);
|
1789 |
} else {
|
1790 |
if (sector + n > new_backing_num_sectors) {
|
1791 |
n = new_backing_num_sectors - sector; |
1792 |
} |
1793 |
|
1794 |
ret = bdrv_read(bs_new_backing, sector, buf_new, n); |
1795 |
if (ret < 0) { |
1796 |
error_report("error while reading from new backing file");
|
1797 |
goto out;
|
1798 |
} |
1799 |
} |
1800 |
|
1801 |
/* If they differ, we need to write to the COW file */
|
1802 |
uint64_t written = 0;
|
1803 |
|
1804 |
while (written < n) {
|
1805 |
int pnum;
|
1806 |
|
1807 |
if (compare_sectors(buf_old + written * 512, |
1808 |
buf_new + written * 512, n - written, &pnum))
|
1809 |
{ |
1810 |
ret = bdrv_write(bs, sector + written, |
1811 |
buf_old + written * 512, pnum);
|
1812 |
if (ret < 0) { |
1813 |
error_report("Error while writing to COW image: %s",
|
1814 |
strerror(-ret)); |
1815 |
goto out;
|
1816 |
} |
1817 |
} |
1818 |
|
1819 |
written += pnum; |
1820 |
} |
1821 |
qemu_progress_print(local_progress, 100);
|
1822 |
} |
1823 |
|
1824 |
qemu_vfree(buf_old); |
1825 |
qemu_vfree(buf_new); |
1826 |
} |
1827 |
|
1828 |
/*
|
1829 |
* Change the backing file. All clusters that are different from the old
|
1830 |
* backing file are overwritten in the COW file now, so the visible content
|
1831 |
* doesn't change when we switch the backing file.
|
1832 |
*/
|
1833 |
if (out_baseimg && *out_baseimg) {
|
1834 |
ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt); |
1835 |
} else {
|
1836 |
ret = bdrv_change_backing_file(bs, NULL, NULL); |
1837 |
} |
1838 |
|
1839 |
if (ret == -ENOSPC) {
|
1840 |
error_report("Could not change the backing file to '%s': No "
|
1841 |
"space left in the file header", out_baseimg);
|
1842 |
} else if (ret < 0) { |
1843 |
error_report("Could not change the backing file to '%s': %s",
|
1844 |
out_baseimg, strerror(-ret)); |
1845 |
} |
1846 |
|
1847 |
qemu_progress_print(100, 0); |
1848 |
/*
|
1849 |
* TODO At this point it is possible to check if any clusters that are
|
1850 |
* allocated in the COW file are the same in the backing file. If so, they
|
1851 |
* could be dropped from the COW file. Don't do this before switching the
|
1852 |
* backing file, in case of a crash this would lead to corruption.
|
1853 |
*/
|
1854 |
out:
|
1855 |
qemu_progress_end(); |
1856 |
/* Cleanup */
|
1857 |
if (!unsafe) {
|
1858 |
if (bs_old_backing != NULL) { |
1859 |
bdrv_delete(bs_old_backing); |
1860 |
} |
1861 |
if (bs_new_backing != NULL) { |
1862 |
bdrv_delete(bs_new_backing); |
1863 |
} |
1864 |
} |
1865 |
|
1866 |
bdrv_delete(bs); |
1867 |
if (ret) {
|
1868 |
return 1; |
1869 |
} |
1870 |
return 0; |
1871 |
} |
1872 |
|
1873 |
static int img_resize(int argc, char **argv) |
1874 |
{ |
1875 |
int c, ret, relative;
|
1876 |
const char *filename, *fmt, *size; |
1877 |
int64_t n, total_size; |
1878 |
BlockDriverState *bs = NULL;
|
1879 |
QemuOpts *param; |
1880 |
static QemuOptsList resize_options = {
|
1881 |
.name = "resize_options",
|
1882 |
.head = QTAILQ_HEAD_INITIALIZER(resize_options.head), |
1883 |
.desc = { |
1884 |
{ |
1885 |
.name = BLOCK_OPT_SIZE, |
1886 |
.type = QEMU_OPT_SIZE, |
1887 |
.help = "Virtual disk size"
|
1888 |
}, { |
1889 |
/* end of list */
|
1890 |
} |
1891 |
}, |
1892 |
}; |
1893 |
|
1894 |
/* Remove size from argv manually so that negative numbers are not treated
|
1895 |
* as options by getopt. */
|
1896 |
if (argc < 3) { |
1897 |
help(); |
1898 |
return 1; |
1899 |
} |
1900 |
|
1901 |
size = argv[--argc]; |
1902 |
|
1903 |
/* Parse getopt arguments */
|
1904 |
fmt = NULL;
|
1905 |
for(;;) {
|
1906 |
c = getopt(argc, argv, "f:h");
|
1907 |
if (c == -1) { |
1908 |
break;
|
1909 |
} |
1910 |
switch(c) {
|
1911 |
case '?': |
1912 |
case 'h': |
1913 |
help(); |
1914 |
break;
|
1915 |
case 'f': |
1916 |
fmt = optarg; |
1917 |
break;
|
1918 |
} |
1919 |
} |
1920 |
if (optind >= argc) {
|
1921 |
help(); |
1922 |
} |
1923 |
filename = argv[optind++]; |
1924 |
|
1925 |
/* Choose grow, shrink, or absolute resize mode */
|
1926 |
switch (size[0]) { |
1927 |
case '+': |
1928 |
relative = 1;
|
1929 |
size++; |
1930 |
break;
|
1931 |
case '-': |
1932 |
relative = -1;
|
1933 |
size++; |
1934 |
break;
|
1935 |
default:
|
1936 |
relative = 0;
|
1937 |
break;
|
1938 |
} |
1939 |
|
1940 |
/* Parse size */
|
1941 |
param = qemu_opts_create_nofail(&resize_options); |
1942 |
if (qemu_opt_set(param, BLOCK_OPT_SIZE, size)) {
|
1943 |
/* Error message already printed when size parsing fails */
|
1944 |
ret = -1;
|
1945 |
qemu_opts_del(param); |
1946 |
goto out;
|
1947 |
} |
1948 |
n = qemu_opt_get_size(param, BLOCK_OPT_SIZE, 0);
|
1949 |
qemu_opts_del(param); |
1950 |
|
1951 |
bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR, true);
|
1952 |
if (!bs) {
|
1953 |
ret = -1;
|
1954 |
goto out;
|
1955 |
} |
1956 |
|
1957 |
if (relative) {
|
1958 |
total_size = bdrv_getlength(bs) + n * relative; |
1959 |
} else {
|
1960 |
total_size = n; |
1961 |
} |
1962 |
if (total_size <= 0) { |
1963 |
error_report("New image size must be positive");
|
1964 |
ret = -1;
|
1965 |
goto out;
|
1966 |
} |
1967 |
|
1968 |
ret = bdrv_truncate(bs, total_size); |
1969 |
switch (ret) {
|
1970 |
case 0: |
1971 |
printf("Image resized.\n");
|
1972 |
break;
|
1973 |
case -ENOTSUP:
|
1974 |
error_report("This image does not support resize");
|
1975 |
break;
|
1976 |
case -EACCES:
|
1977 |
error_report("Image is read-only");
|
1978 |
break;
|
1979 |
default:
|
1980 |
error_report("Error resizing image (%d)", -ret);
|
1981 |
break;
|
1982 |
} |
1983 |
out:
|
1984 |
if (bs) {
|
1985 |
bdrv_delete(bs); |
1986 |
} |
1987 |
if (ret) {
|
1988 |
return 1; |
1989 |
} |
1990 |
return 0; |
1991 |
} |
1992 |
|
1993 |
static const img_cmd_t img_cmds[] = { |
1994 |
#define DEF(option, callback, arg_string) \
|
1995 |
{ option, callback }, |
1996 |
#include "qemu-img-cmds.h" |
1997 |
#undef DEF
|
1998 |
#undef GEN_DOCS
|
1999 |
{ NULL, NULL, }, |
2000 |
}; |
2001 |
|
2002 |
int main(int argc, char **argv) |
2003 |
{ |
2004 |
const img_cmd_t *cmd;
|
2005 |
const char *cmdname; |
2006 |
|
2007 |
error_set_progname(argv[0]);
|
2008 |
|
2009 |
qemu_init_main_loop(); |
2010 |
bdrv_init(); |
2011 |
if (argc < 2) |
2012 |
help(); |
2013 |
cmdname = argv[1];
|
2014 |
argc--; argv++; |
2015 |
|
2016 |
/* find the command */
|
2017 |
for(cmd = img_cmds; cmd->name != NULL; cmd++) { |
2018 |
if (!strcmp(cmdname, cmd->name)) {
|
2019 |
return cmd->handler(argc, argv);
|
2020 |
} |
2021 |
} |
2022 |
|
2023 |
/* not found */
|
2024 |
help(); |
2025 |
return 0; |
2026 |
} |