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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; |
44 |
|
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enum {
|
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OPTION_OUTPUT = 256,
|
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OPTION_BACKING_CHAIN = 257,
|
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}; |
49 |
|
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typedef enum OutputFormat { |
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OFORMAT_JSON, |
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OFORMAT_HUMAN, |
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} OutputFormat; |
54 |
|
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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" |
58 |
|
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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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} |
63 |
|
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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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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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} |
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|
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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); |
129 |
i = 0;
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for(;;) {
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c = getchar(); |
132 |
if (c == '\n') |
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break;
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if (i < (buf_size - 1)) |
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buf[i++] = c; |
136 |
} |
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buf[i] = '\0';
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return 0; |
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} |
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|
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#else
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|
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#include <termios.h> |
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|
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static struct termios oldtty; |
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|
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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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} |
151 |
|
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static void term_init(void) |
153 |
{ |
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struct termios tty;
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|
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tcgetattr (0, &tty);
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oldtty = tty; |
158 |
|
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tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP |
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|INLCR|IGNCR|ICRNL|IXON); |
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tty.c_oflag |= OPOST; |
162 |
tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN); |
163 |
tty.c_cflag &= ~(CSIZE|PARENB); |
164 |
tty.c_cflag |= CS8; |
165 |
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); |
171 |
} |
172 |
|
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static int read_password(char *buf, int buf_size) |
174 |
{ |
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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); |
180 |
term_init(); |
181 |
i = 0;
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for(;;) {
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ret = read(0, &ch, 1); |
184 |
if (ret == -1) { |
185 |
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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} |
191 |
} else if (ret == 0) { |
192 |
ret = -1;
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break;
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194 |
} else {
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if (ch == '\r') { |
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ret = 0;
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break;
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} |
199 |
if (i < (buf_size - 1)) |
200 |
buf[i++] = ch; |
201 |
} |
202 |
} |
203 |
term_exit(); |
204 |
buf[i] = '\0';
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printf("\n");
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return ret;
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} |
208 |
#endif
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209 |
|
210 |
static int print_block_option_help(const char *filename, const char *fmt) |
211 |
{ |
212 |
BlockDriver *drv, *proto_drv; |
213 |
QEMUOptionParameter *create_options = NULL;
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|
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/* Find driver and parse its options */
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drv = bdrv_find_format(fmt); |
217 |
if (!drv) {
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error_report("Unknown file format '%s'", fmt);
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return 1; |
220 |
} |
221 |
|
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proto_drv = bdrv_find_protocol(filename); |
223 |
if (!proto_drv) {
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error_report("Unknown protocol '%s'", filename);
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return 1; |
226 |
} |
227 |
|
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create_options = append_option_parameters(create_options, |
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drv->create_options); |
230 |
create_options = append_option_parameters(create_options, |
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proto_drv->create_options); |
232 |
print_option_help(create_options); |
233 |
free_option_parameters(create_options); |
234 |
return 0; |
235 |
} |
236 |
|
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static BlockDriverState *bdrv_new_open(const char *filename, |
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const char *fmt, |
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int flags,
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bool require_io)
|
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{ |
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BlockDriverState *bs; |
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BlockDriver *drv; |
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char password[256]; |
245 |
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); |
251 |
if (!drv) {
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error_report("Unknown file format '%s'", fmt);
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goto fail;
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} |
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} else {
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drv = NULL;
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} |
258 |
|
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ret = bdrv_open(bs, filename, flags, drv); |
260 |
if (ret < 0) { |
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error_report("Could not open '%s': %s", filename, strerror(-ret));
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goto fail;
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} |
264 |
|
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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) { |
268 |
error_report("No password given");
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goto fail;
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} |
271 |
if (bdrv_set_key(bs, password) < 0) { |
272 |
error_report("invalid password");
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goto fail;
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} |
275 |
} |
276 |
return bs;
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fail:
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if (bs) {
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bdrv_delete(bs); |
280 |
} |
281 |
return NULL; |
282 |
} |
283 |
|
284 |
static int add_old_style_options(const char *fmt, QEMUOptionParameter *list, |
285 |
const char *base_filename, |
286 |
const char *base_fmt) |
287 |
{ |
288 |
if (base_filename) {
|
289 |
if (set_option_parameter(list, BLOCK_OPT_BACKING_FILE, base_filename)) {
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error_report("Backing file not supported for file format '%s'",
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fmt); |
292 |
return -1; |
293 |
} |
294 |
} |
295 |
if (base_fmt) {
|
296 |
if (set_option_parameter(list, BLOCK_OPT_BACKING_FMT, base_fmt)) {
|
297 |
error_report("Backing file format not supported for file "
|
298 |
"format '%s'", fmt);
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299 |
return -1; |
300 |
} |
301 |
} |
302 |
return 0; |
303 |
} |
304 |
|
305 |
static int img_create(int argc, char **argv) |
306 |
{ |
307 |
int c;
|
308 |
uint64_t img_size = -1;
|
309 |
const char *fmt = "raw"; |
310 |
const char *base_fmt = NULL; |
311 |
const char *filename; |
312 |
const char *base_filename = NULL; |
313 |
char *options = NULL; |
314 |
Error *local_err = NULL;
|
315 |
|
316 |
for(;;) {
|
317 |
c = getopt(argc, argv, "F:b:f:he6o:");
|
318 |
if (c == -1) { |
319 |
break;
|
320 |
} |
321 |
switch(c) {
|
322 |
case '?': |
323 |
case 'h': |
324 |
help(); |
325 |
break;
|
326 |
case 'F': |
327 |
base_fmt = optarg; |
328 |
break;
|
329 |
case 'b': |
330 |
base_filename = optarg; |
331 |
break;
|
332 |
case 'f': |
333 |
fmt = optarg; |
334 |
break;
|
335 |
case 'e': |
336 |
error_report("option -e is deprecated, please use \'-o "
|
337 |
"encryption\' instead!");
|
338 |
return 1; |
339 |
case '6': |
340 |
error_report("option -6 is deprecated, please use \'-o "
|
341 |
"compat6\' instead!");
|
342 |
return 1; |
343 |
case 'o': |
344 |
options = optarg; |
345 |
break;
|
346 |
} |
347 |
} |
348 |
|
349 |
/* Get the filename */
|
350 |
if (optind >= argc) {
|
351 |
help(); |
352 |
} |
353 |
filename = argv[optind++]; |
354 |
|
355 |
/* Get image size, if specified */
|
356 |
if (optind < argc) {
|
357 |
int64_t sval; |
358 |
char *end;
|
359 |
sval = strtosz_suffix(argv[optind++], &end, STRTOSZ_DEFSUFFIX_B); |
360 |
if (sval < 0 || *end) { |
361 |
if (sval == -ERANGE) {
|
362 |
error_report("Image size must be less than 8 EiB!");
|
363 |
} else {
|
364 |
error_report("Invalid image size specified! You may use k, M, "
|
365 |
"G or T suffixes for ");
|
366 |
error_report("kilobytes, megabytes, gigabytes and terabytes.");
|
367 |
} |
368 |
return 1; |
369 |
} |
370 |
img_size = (uint64_t)sval; |
371 |
} |
372 |
|
373 |
if (options && is_help_option(options)) {
|
374 |
return print_block_option_help(filename, fmt);
|
375 |
} |
376 |
|
377 |
bdrv_img_create(filename, fmt, base_filename, base_fmt, |
378 |
options, img_size, BDRV_O_FLAGS, &local_err); |
379 |
if (error_is_set(&local_err)) {
|
380 |
error_report("%s", error_get_pretty(local_err));
|
381 |
error_free(local_err); |
382 |
return 1; |
383 |
} |
384 |
|
385 |
return 0; |
386 |
} |
387 |
|
388 |
static void dump_json_image_check(ImageCheck *check) |
389 |
{ |
390 |
Error *errp = NULL;
|
391 |
QString *str; |
392 |
QmpOutputVisitor *ov = qmp_output_visitor_new(); |
393 |
QObject *obj; |
394 |
visit_type_ImageCheck(qmp_output_get_visitor(ov), |
395 |
&check, NULL, &errp);
|
396 |
obj = qmp_output_get_qobject(ov); |
397 |
str = qobject_to_json_pretty(obj); |
398 |
assert(str != NULL);
|
399 |
printf("%s\n", qstring_get_str(str));
|
400 |
qobject_decref(obj); |
401 |
qmp_output_visitor_cleanup(ov); |
402 |
QDECREF(str); |
403 |
} |
404 |
|
405 |
static void dump_human_image_check(ImageCheck *check) |
406 |
{ |
407 |
if (!(check->corruptions || check->leaks || check->check_errors)) {
|
408 |
printf("No errors were found on the image.\n");
|
409 |
} else {
|
410 |
if (check->corruptions) {
|
411 |
printf("\n%" PRId64 " errors were found on the image.\n" |
412 |
"Data may be corrupted, or further writes to the image "
|
413 |
"may corrupt it.\n",
|
414 |
check->corruptions); |
415 |
} |
416 |
|
417 |
if (check->leaks) {
|
418 |
printf("\n%" PRId64 " leaked clusters were found on the image.\n" |
419 |
"This means waste of disk space, but no harm to data.\n",
|
420 |
check->leaks); |
421 |
} |
422 |
|
423 |
if (check->check_errors) {
|
424 |
printf("\n%" PRId64 " internal errors have occurred during the check.\n", |
425 |
check->check_errors); |
426 |
} |
427 |
} |
428 |
|
429 |
if (check->total_clusters != 0 && check->allocated_clusters != 0) { |
430 |
printf("%" PRId64 "/%" PRId64 " = %0.2f%% allocated, " |
431 |
"%0.2f%% fragmented, %0.2f%% compressed clusters\n",
|
432 |
check->allocated_clusters, check->total_clusters, |
433 |
check->allocated_clusters * 100.0 / check->total_clusters, |
434 |
check->fragmented_clusters * 100.0 / check->allocated_clusters, |
435 |
check->compressed_clusters * 100.0 / check->allocated_clusters); |
436 |
} |
437 |
|
438 |
if (check->image_end_offset) {
|
439 |
printf("Image end offset: %" PRId64 "\n", check->image_end_offset); |
440 |
} |
441 |
} |
442 |
|
443 |
static int collect_image_check(BlockDriverState *bs, |
444 |
ImageCheck *check, |
445 |
const char *filename, |
446 |
const char *fmt, |
447 |
int fix)
|
448 |
{ |
449 |
int ret;
|
450 |
BdrvCheckResult result; |
451 |
|
452 |
ret = bdrv_check(bs, &result, fix); |
453 |
if (ret < 0) { |
454 |
return ret;
|
455 |
} |
456 |
|
457 |
check->filename = g_strdup(filename); |
458 |
check->format = g_strdup(bdrv_get_format_name(bs)); |
459 |
check->check_errors = result.check_errors; |
460 |
check->corruptions = result.corruptions; |
461 |
check->has_corruptions = result.corruptions != 0;
|
462 |
check->leaks = result.leaks; |
463 |
check->has_leaks = result.leaks != 0;
|
464 |
check->corruptions_fixed = result.corruptions_fixed; |
465 |
check->has_corruptions_fixed = result.corruptions != 0;
|
466 |
check->leaks_fixed = result.leaks_fixed; |
467 |
check->has_leaks_fixed = result.leaks != 0;
|
468 |
check->image_end_offset = result.image_end_offset; |
469 |
check->has_image_end_offset = result.image_end_offset != 0;
|
470 |
check->total_clusters = result.bfi.total_clusters; |
471 |
check->has_total_clusters = result.bfi.total_clusters != 0;
|
472 |
check->allocated_clusters = result.bfi.allocated_clusters; |
473 |
check->has_allocated_clusters = result.bfi.allocated_clusters != 0;
|
474 |
check->fragmented_clusters = result.bfi.fragmented_clusters; |
475 |
check->has_fragmented_clusters = result.bfi.fragmented_clusters != 0;
|
476 |
check->compressed_clusters = result.bfi.compressed_clusters; |
477 |
check->has_compressed_clusters = result.bfi.compressed_clusters != 0;
|
478 |
|
479 |
return 0; |
480 |
} |
481 |
|
482 |
/*
|
483 |
* Checks an image for consistency. Exit codes:
|
484 |
*
|
485 |
* 0 - Check completed, image is good
|
486 |
* 1 - Check not completed because of internal errors
|
487 |
* 2 - Check completed, image is corrupted
|
488 |
* 3 - Check completed, image has leaked clusters, but is good otherwise
|
489 |
*/
|
490 |
static int img_check(int argc, char **argv) |
491 |
{ |
492 |
int c, ret;
|
493 |
OutputFormat output_format = OFORMAT_HUMAN; |
494 |
const char *filename, *fmt, *output; |
495 |
BlockDriverState *bs; |
496 |
int fix = 0; |
497 |
int flags = BDRV_O_FLAGS | BDRV_O_CHECK;
|
498 |
ImageCheck *check; |
499 |
|
500 |
fmt = NULL;
|
501 |
output = NULL;
|
502 |
for(;;) {
|
503 |
int option_index = 0; |
504 |
static const struct option long_options[] = { |
505 |
{"help", no_argument, 0, 'h'}, |
506 |
{"format", required_argument, 0, 'f'}, |
507 |
{"repair", no_argument, 0, 'r'}, |
508 |
{"output", required_argument, 0, OPTION_OUTPUT}, |
509 |
{0, 0, 0, 0} |
510 |
}; |
511 |
c = getopt_long(argc, argv, "f:hr:",
|
512 |
long_options, &option_index); |
513 |
if (c == -1) { |
514 |
break;
|
515 |
} |
516 |
switch(c) {
|
517 |
case '?': |
518 |
case 'h': |
519 |
help(); |
520 |
break;
|
521 |
case 'f': |
522 |
fmt = optarg; |
523 |
break;
|
524 |
case 'r': |
525 |
flags |= BDRV_O_RDWR; |
526 |
|
527 |
if (!strcmp(optarg, "leaks")) { |
528 |
fix = BDRV_FIX_LEAKS; |
529 |
} else if (!strcmp(optarg, "all")) { |
530 |
fix = BDRV_FIX_LEAKS | BDRV_FIX_ERRORS; |
531 |
} else {
|
532 |
help(); |
533 |
} |
534 |
break;
|
535 |
case OPTION_OUTPUT:
|
536 |
output = optarg; |
537 |
break;
|
538 |
} |
539 |
} |
540 |
if (optind >= argc) {
|
541 |
help(); |
542 |
} |
543 |
filename = argv[optind++]; |
544 |
|
545 |
if (output && !strcmp(output, "json")) { |
546 |
output_format = OFORMAT_JSON; |
547 |
} else if (output && !strcmp(output, "human")) { |
548 |
output_format = OFORMAT_HUMAN; |
549 |
} else if (output) { |
550 |
error_report("--output must be used with human or json as argument.");
|
551 |
return 1; |
552 |
} |
553 |
|
554 |
bs = bdrv_new_open(filename, fmt, flags, true);
|
555 |
if (!bs) {
|
556 |
return 1; |
557 |
} |
558 |
|
559 |
check = g_new0(ImageCheck, 1);
|
560 |
ret = collect_image_check(bs, check, filename, fmt, fix); |
561 |
|
562 |
if (ret == -ENOTSUP) {
|
563 |
if (output_format == OFORMAT_HUMAN) {
|
564 |
error_report("This image format does not support checks");
|
565 |
} |
566 |
ret = 1;
|
567 |
goto fail;
|
568 |
} |
569 |
|
570 |
if (check->corruptions_fixed || check->leaks_fixed) {
|
571 |
int corruptions_fixed, leaks_fixed;
|
572 |
|
573 |
leaks_fixed = check->leaks_fixed; |
574 |
corruptions_fixed = check->corruptions_fixed; |
575 |
|
576 |
if (output_format == OFORMAT_HUMAN) {
|
577 |
printf("The following inconsistencies were found and repaired:\n\n"
|
578 |
" %" PRId64 " leaked clusters\n" |
579 |
" %" PRId64 " corruptions\n\n" |
580 |
"Double checking the fixed image now...\n",
|
581 |
check->leaks_fixed, |
582 |
check->corruptions_fixed); |
583 |
} |
584 |
|
585 |
ret = collect_image_check(bs, check, filename, fmt, 0);
|
586 |
|
587 |
check->leaks_fixed = leaks_fixed; |
588 |
check->corruptions_fixed = corruptions_fixed; |
589 |
} |
590 |
|
591 |
switch (output_format) {
|
592 |
case OFORMAT_HUMAN:
|
593 |
dump_human_image_check(check); |
594 |
break;
|
595 |
case OFORMAT_JSON:
|
596 |
dump_json_image_check(check); |
597 |
break;
|
598 |
} |
599 |
|
600 |
if (ret || check->check_errors) {
|
601 |
ret = 1;
|
602 |
goto fail;
|
603 |
} |
604 |
|
605 |
if (check->corruptions) {
|
606 |
ret = 2;
|
607 |
} else if (check->leaks) { |
608 |
ret = 3;
|
609 |
} else {
|
610 |
ret = 0;
|
611 |
} |
612 |
|
613 |
fail:
|
614 |
qapi_free_ImageCheck(check); |
615 |
bdrv_delete(bs); |
616 |
|
617 |
return ret;
|
618 |
} |
619 |
|
620 |
static int img_commit(int argc, char **argv) |
621 |
{ |
622 |
int c, ret, flags;
|
623 |
const char *filename, *fmt, *cache; |
624 |
BlockDriverState *bs; |
625 |
|
626 |
fmt = NULL;
|
627 |
cache = BDRV_DEFAULT_CACHE; |
628 |
for(;;) {
|
629 |
c = getopt(argc, argv, "f:ht:");
|
630 |
if (c == -1) { |
631 |
break;
|
632 |
} |
633 |
switch(c) {
|
634 |
case '?': |
635 |
case 'h': |
636 |
help(); |
637 |
break;
|
638 |
case 'f': |
639 |
fmt = optarg; |
640 |
break;
|
641 |
case 't': |
642 |
cache = optarg; |
643 |
break;
|
644 |
} |
645 |
} |
646 |
if (optind >= argc) {
|
647 |
help(); |
648 |
} |
649 |
filename = argv[optind++]; |
650 |
|
651 |
flags = BDRV_O_RDWR; |
652 |
ret = bdrv_parse_cache_flags(cache, &flags); |
653 |
if (ret < 0) { |
654 |
error_report("Invalid cache option: %s", cache);
|
655 |
return -1; |
656 |
} |
657 |
|
658 |
bs = bdrv_new_open(filename, fmt, flags, true);
|
659 |
if (!bs) {
|
660 |
return 1; |
661 |
} |
662 |
ret = bdrv_commit(bs); |
663 |
switch(ret) {
|
664 |
case 0: |
665 |
printf("Image committed.\n");
|
666 |
break;
|
667 |
case -ENOENT:
|
668 |
error_report("No disk inserted");
|
669 |
break;
|
670 |
case -EACCES:
|
671 |
error_report("Image is read-only");
|
672 |
break;
|
673 |
case -ENOTSUP:
|
674 |
error_report("Image is already committed");
|
675 |
break;
|
676 |
default:
|
677 |
error_report("Error while committing image");
|
678 |
break;
|
679 |
} |
680 |
|
681 |
bdrv_delete(bs); |
682 |
if (ret) {
|
683 |
return 1; |
684 |
} |
685 |
return 0; |
686 |
} |
687 |
|
688 |
/*
|
689 |
* Returns true iff the first sector pointed to by 'buf' contains at least
|
690 |
* a non-NUL byte.
|
691 |
*
|
692 |
* 'pnum' is set to the number of sectors (including and immediately following
|
693 |
* the first one) that are known to be in the same allocated/unallocated state.
|
694 |
*/
|
695 |
static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) |
696 |
{ |
697 |
bool is_zero;
|
698 |
int i;
|
699 |
|
700 |
if (n <= 0) { |
701 |
*pnum = 0;
|
702 |
return 0; |
703 |
} |
704 |
is_zero = buffer_is_zero(buf, 512);
|
705 |
for(i = 1; i < n; i++) { |
706 |
buf += 512;
|
707 |
if (is_zero != buffer_is_zero(buf, 512)) { |
708 |
break;
|
709 |
} |
710 |
} |
711 |
*pnum = i; |
712 |
return !is_zero;
|
713 |
} |
714 |
|
715 |
/*
|
716 |
* Like is_allocated_sectors, but if the buffer starts with a used sector,
|
717 |
* up to 'min' consecutive sectors containing zeros are ignored. This avoids
|
718 |
* breaking up write requests for only small sparse areas.
|
719 |
*/
|
720 |
static int is_allocated_sectors_min(const uint8_t *buf, int n, int *pnum, |
721 |
int min)
|
722 |
{ |
723 |
int ret;
|
724 |
int num_checked, num_used;
|
725 |
|
726 |
if (n < min) {
|
727 |
min = n; |
728 |
} |
729 |
|
730 |
ret = is_allocated_sectors(buf, n, pnum); |
731 |
if (!ret) {
|
732 |
return ret;
|
733 |
} |
734 |
|
735 |
num_used = *pnum; |
736 |
buf += BDRV_SECTOR_SIZE * *pnum; |
737 |
n -= *pnum; |
738 |
num_checked = num_used; |
739 |
|
740 |
while (n > 0) { |
741 |
ret = is_allocated_sectors(buf, n, pnum); |
742 |
|
743 |
buf += BDRV_SECTOR_SIZE * *pnum; |
744 |
n -= *pnum; |
745 |
num_checked += *pnum; |
746 |
if (ret) {
|
747 |
num_used = num_checked; |
748 |
} else if (*pnum >= min) { |
749 |
break;
|
750 |
} |
751 |
} |
752 |
|
753 |
*pnum = num_used; |
754 |
return 1; |
755 |
} |
756 |
|
757 |
/*
|
758 |
* Compares two buffers sector by sector. Returns 0 if the first sector of both
|
759 |
* buffers matches, non-zero otherwise.
|
760 |
*
|
761 |
* pnum is set to the number of sectors (including and immediately following
|
762 |
* the first one) that are known to have the same comparison result
|
763 |
*/
|
764 |
static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n, |
765 |
int *pnum)
|
766 |
{ |
767 |
int res, i;
|
768 |
|
769 |
if (n <= 0) { |
770 |
*pnum = 0;
|
771 |
return 0; |
772 |
} |
773 |
|
774 |
res = !!memcmp(buf1, buf2, 512);
|
775 |
for(i = 1; i < n; i++) { |
776 |
buf1 += 512;
|
777 |
buf2 += 512;
|
778 |
|
779 |
if (!!memcmp(buf1, buf2, 512) != res) { |
780 |
break;
|
781 |
} |
782 |
} |
783 |
|
784 |
*pnum = i; |
785 |
return res;
|
786 |
} |
787 |
|
788 |
#define IO_BUF_SIZE (2 * 1024 * 1024) |
789 |
|
790 |
static int img_convert(int argc, char **argv) |
791 |
{ |
792 |
int c, ret = 0, n, n1, bs_n, bs_i, compress, cluster_size, cluster_sectors; |
793 |
int progress = 0, flags; |
794 |
const char *fmt, *out_fmt, *cache, *out_baseimg, *out_filename; |
795 |
BlockDriver *drv, *proto_drv; |
796 |
BlockDriverState **bs = NULL, *out_bs = NULL; |
797 |
int64_t total_sectors, nb_sectors, sector_num, bs_offset; |
798 |
uint64_t bs_sectors; |
799 |
uint8_t * buf = NULL;
|
800 |
const uint8_t *buf1;
|
801 |
BlockDriverInfo bdi; |
802 |
QEMUOptionParameter *param = NULL, *create_options = NULL; |
803 |
QEMUOptionParameter *out_baseimg_param; |
804 |
char *options = NULL; |
805 |
const char *snapshot_name = NULL; |
806 |
float local_progress = 0; |
807 |
int min_sparse = 8; /* Need at least 4k of zeros for sparse detection */ |
808 |
|
809 |
fmt = NULL;
|
810 |
out_fmt = "raw";
|
811 |
cache = "unsafe";
|
812 |
out_baseimg = NULL;
|
813 |
compress = 0;
|
814 |
for(;;) {
|
815 |
c = getopt(argc, argv, "f:O:B:s:hce6o:pS:t:");
|
816 |
if (c == -1) { |
817 |
break;
|
818 |
} |
819 |
switch(c) {
|
820 |
case '?': |
821 |
case 'h': |
822 |
help(); |
823 |
break;
|
824 |
case 'f': |
825 |
fmt = optarg; |
826 |
break;
|
827 |
case 'O': |
828 |
out_fmt = optarg; |
829 |
break;
|
830 |
case 'B': |
831 |
out_baseimg = optarg; |
832 |
break;
|
833 |
case 'c': |
834 |
compress = 1;
|
835 |
break;
|
836 |
case 'e': |
837 |
error_report("option -e is deprecated, please use \'-o "
|
838 |
"encryption\' instead!");
|
839 |
return 1; |
840 |
case '6': |
841 |
error_report("option -6 is deprecated, please use \'-o "
|
842 |
"compat6\' instead!");
|
843 |
return 1; |
844 |
case 'o': |
845 |
options = optarg; |
846 |
break;
|
847 |
case 's': |
848 |
snapshot_name = optarg; |
849 |
break;
|
850 |
case 'S': |
851 |
{ |
852 |
int64_t sval; |
853 |
char *end;
|
854 |
sval = strtosz_suffix(optarg, &end, STRTOSZ_DEFSUFFIX_B); |
855 |
if (sval < 0 || *end) { |
856 |
error_report("Invalid minimum zero buffer size for sparse output specified");
|
857 |
return 1; |
858 |
} |
859 |
|
860 |
min_sparse = sval / BDRV_SECTOR_SIZE; |
861 |
break;
|
862 |
} |
863 |
case 'p': |
864 |
progress = 1;
|
865 |
break;
|
866 |
case 't': |
867 |
cache = optarg; |
868 |
break;
|
869 |
} |
870 |
} |
871 |
|
872 |
bs_n = argc - optind - 1;
|
873 |
if (bs_n < 1) { |
874 |
help(); |
875 |
} |
876 |
|
877 |
out_filename = argv[argc - 1];
|
878 |
|
879 |
/* Initialize before goto out */
|
880 |
qemu_progress_init(progress, 2.0); |
881 |
|
882 |
if (options && is_help_option(options)) {
|
883 |
ret = print_block_option_help(out_filename, out_fmt); |
884 |
goto out;
|
885 |
} |
886 |
|
887 |
if (bs_n > 1 && out_baseimg) { |
888 |
error_report("-B makes no sense when concatenating multiple input "
|
889 |
"images");
|
890 |
ret = -1;
|
891 |
goto out;
|
892 |
} |
893 |
|
894 |
qemu_progress_print(0, 100); |
895 |
|
896 |
bs = g_malloc0(bs_n * sizeof(BlockDriverState *));
|
897 |
|
898 |
total_sectors = 0;
|
899 |
for (bs_i = 0; bs_i < bs_n; bs_i++) { |
900 |
bs[bs_i] = bdrv_new_open(argv[optind + bs_i], fmt, BDRV_O_FLAGS, true);
|
901 |
if (!bs[bs_i]) {
|
902 |
error_report("Could not open '%s'", argv[optind + bs_i]);
|
903 |
ret = -1;
|
904 |
goto out;
|
905 |
} |
906 |
bdrv_get_geometry(bs[bs_i], &bs_sectors); |
907 |
total_sectors += bs_sectors; |
908 |
} |
909 |
|
910 |
if (snapshot_name != NULL) { |
911 |
if (bs_n > 1) { |
912 |
error_report("No support for concatenating multiple snapshot");
|
913 |
ret = -1;
|
914 |
goto out;
|
915 |
} |
916 |
if (bdrv_snapshot_load_tmp(bs[0], snapshot_name) < 0) { |
917 |
error_report("Failed to load snapshot");
|
918 |
ret = -1;
|
919 |
goto out;
|
920 |
} |
921 |
} |
922 |
|
923 |
/* Find driver and parse its options */
|
924 |
drv = bdrv_find_format(out_fmt); |
925 |
if (!drv) {
|
926 |
error_report("Unknown file format '%s'", out_fmt);
|
927 |
ret = -1;
|
928 |
goto out;
|
929 |
} |
930 |
|
931 |
proto_drv = bdrv_find_protocol(out_filename); |
932 |
if (!proto_drv) {
|
933 |
error_report("Unknown protocol '%s'", out_filename);
|
934 |
ret = -1;
|
935 |
goto out;
|
936 |
} |
937 |
|
938 |
create_options = append_option_parameters(create_options, |
939 |
drv->create_options); |
940 |
create_options = append_option_parameters(create_options, |
941 |
proto_drv->create_options); |
942 |
|
943 |
if (options) {
|
944 |
param = parse_option_parameters(options, create_options, param); |
945 |
if (param == NULL) { |
946 |
error_report("Invalid options for file format '%s'.", out_fmt);
|
947 |
ret = -1;
|
948 |
goto out;
|
949 |
} |
950 |
} else {
|
951 |
param = parse_option_parameters("", create_options, param);
|
952 |
} |
953 |
|
954 |
set_option_parameter_int(param, BLOCK_OPT_SIZE, total_sectors * 512);
|
955 |
ret = add_old_style_options(out_fmt, param, out_baseimg, NULL);
|
956 |
if (ret < 0) { |
957 |
goto out;
|
958 |
} |
959 |
|
960 |
/* Get backing file name if -o backing_file was used */
|
961 |
out_baseimg_param = get_option_parameter(param, BLOCK_OPT_BACKING_FILE); |
962 |
if (out_baseimg_param) {
|
963 |
out_baseimg = out_baseimg_param->value.s; |
964 |
} |
965 |
|
966 |
/* Check if compression is supported */
|
967 |
if (compress) {
|
968 |
QEMUOptionParameter *encryption = |
969 |
get_option_parameter(param, BLOCK_OPT_ENCRYPT); |
970 |
QEMUOptionParameter *preallocation = |
971 |
get_option_parameter(param, BLOCK_OPT_PREALLOC); |
972 |
|
973 |
if (!drv->bdrv_write_compressed) {
|
974 |
error_report("Compression not supported for this file format");
|
975 |
ret = -1;
|
976 |
goto out;
|
977 |
} |
978 |
|
979 |
if (encryption && encryption->value.n) {
|
980 |
error_report("Compression and encryption not supported at "
|
981 |
"the same time");
|
982 |
ret = -1;
|
983 |
goto out;
|
984 |
} |
985 |
|
986 |
if (preallocation && preallocation->value.s
|
987 |
&& strcmp(preallocation->value.s, "off"))
|
988 |
{ |
989 |
error_report("Compression and preallocation not supported at "
|
990 |
"the same time");
|
991 |
ret = -1;
|
992 |
goto out;
|
993 |
} |
994 |
} |
995 |
|
996 |
/* Create the new image */
|
997 |
ret = bdrv_create(drv, out_filename, param); |
998 |
if (ret < 0) { |
999 |
if (ret == -ENOTSUP) {
|
1000 |
error_report("Formatting not supported for file format '%s'",
|
1001 |
out_fmt); |
1002 |
} else if (ret == -EFBIG) { |
1003 |
error_report("The image size is too large for file format '%s'",
|
1004 |
out_fmt); |
1005 |
} else {
|
1006 |
error_report("%s: error while converting %s: %s",
|
1007 |
out_filename, out_fmt, strerror(-ret)); |
1008 |
} |
1009 |
goto out;
|
1010 |
} |
1011 |
|
1012 |
flags = BDRV_O_RDWR; |
1013 |
ret = bdrv_parse_cache_flags(cache, &flags); |
1014 |
if (ret < 0) { |
1015 |
error_report("Invalid cache option: %s", cache);
|
1016 |
return -1; |
1017 |
} |
1018 |
|
1019 |
out_bs = bdrv_new_open(out_filename, out_fmt, flags, true);
|
1020 |
if (!out_bs) {
|
1021 |
ret = -1;
|
1022 |
goto out;
|
1023 |
} |
1024 |
|
1025 |
bs_i = 0;
|
1026 |
bs_offset = 0;
|
1027 |
bdrv_get_geometry(bs[0], &bs_sectors);
|
1028 |
buf = qemu_blockalign(out_bs, IO_BUF_SIZE); |
1029 |
|
1030 |
if (compress) {
|
1031 |
ret = bdrv_get_info(out_bs, &bdi); |
1032 |
if (ret < 0) { |
1033 |
error_report("could not get block driver info");
|
1034 |
goto out;
|
1035 |
} |
1036 |
cluster_size = bdi.cluster_size; |
1037 |
if (cluster_size <= 0 || cluster_size > IO_BUF_SIZE) { |
1038 |
error_report("invalid cluster size");
|
1039 |
ret = -1;
|
1040 |
goto out;
|
1041 |
} |
1042 |
cluster_sectors = cluster_size >> 9;
|
1043 |
sector_num = 0;
|
1044 |
|
1045 |
nb_sectors = total_sectors; |
1046 |
if (nb_sectors != 0) { |
1047 |
local_progress = (float)100 / |
1048 |
(nb_sectors / MIN(nb_sectors, cluster_sectors)); |
1049 |
} |
1050 |
|
1051 |
for(;;) {
|
1052 |
int64_t bs_num; |
1053 |
int remainder;
|
1054 |
uint8_t *buf2; |
1055 |
|
1056 |
nb_sectors = total_sectors - sector_num; |
1057 |
if (nb_sectors <= 0) |
1058 |
break;
|
1059 |
if (nb_sectors >= cluster_sectors)
|
1060 |
n = cluster_sectors; |
1061 |
else
|
1062 |
n = nb_sectors; |
1063 |
|
1064 |
bs_num = sector_num - bs_offset; |
1065 |
assert (bs_num >= 0);
|
1066 |
remainder = n; |
1067 |
buf2 = buf; |
1068 |
while (remainder > 0) { |
1069 |
int nlow;
|
1070 |
while (bs_num == bs_sectors) {
|
1071 |
bs_i++; |
1072 |
assert (bs_i < bs_n); |
1073 |
bs_offset += bs_sectors; |
1074 |
bdrv_get_geometry(bs[bs_i], &bs_sectors); |
1075 |
bs_num = 0;
|
1076 |
/* printf("changing part: sector_num=%" PRId64 ", "
|
1077 |
"bs_i=%d, bs_offset=%" PRId64 ", bs_sectors=%" PRId64
|
1078 |
"\n", sector_num, bs_i, bs_offset, bs_sectors); */
|
1079 |
} |
1080 |
assert (bs_num < bs_sectors); |
1081 |
|
1082 |
nlow = (remainder > bs_sectors - bs_num) ? bs_sectors - bs_num : remainder; |
1083 |
|
1084 |
ret = bdrv_read(bs[bs_i], bs_num, buf2, nlow); |
1085 |
if (ret < 0) { |
1086 |
error_report("error while reading sector %" PRId64 ": %s", |
1087 |
bs_num, strerror(-ret)); |
1088 |
goto out;
|
1089 |
} |
1090 |
|
1091 |
buf2 += nlow * 512;
|
1092 |
bs_num += nlow; |
1093 |
|
1094 |
remainder -= nlow; |
1095 |
} |
1096 |
assert (remainder == 0);
|
1097 |
|
1098 |
if (n < cluster_sectors) {
|
1099 |
memset(buf + n * 512, 0, cluster_size - n * 512); |
1100 |
} |
1101 |
if (!buffer_is_zero(buf, cluster_size)) {
|
1102 |
ret = bdrv_write_compressed(out_bs, sector_num, buf, |
1103 |
cluster_sectors); |
1104 |
if (ret != 0) { |
1105 |
error_report("error while compressing sector %" PRId64
|
1106 |
": %s", sector_num, strerror(-ret));
|
1107 |
goto out;
|
1108 |
} |
1109 |
} |
1110 |
sector_num += n; |
1111 |
qemu_progress_print(local_progress, 100);
|
1112 |
} |
1113 |
/* signal EOF to align */
|
1114 |
bdrv_write_compressed(out_bs, 0, NULL, 0); |
1115 |
} else {
|
1116 |
int has_zero_init = bdrv_has_zero_init(out_bs);
|
1117 |
|
1118 |
sector_num = 0; // total number of sectors converted so far |
1119 |
nb_sectors = total_sectors - sector_num; |
1120 |
if (nb_sectors != 0) { |
1121 |
local_progress = (float)100 / |
1122 |
(nb_sectors / MIN(nb_sectors, IO_BUF_SIZE / 512));
|
1123 |
} |
1124 |
|
1125 |
for(;;) {
|
1126 |
nb_sectors = total_sectors - sector_num; |
1127 |
if (nb_sectors <= 0) { |
1128 |
break;
|
1129 |
} |
1130 |
if (nb_sectors >= (IO_BUF_SIZE / 512)) { |
1131 |
n = (IO_BUF_SIZE / 512);
|
1132 |
} else {
|
1133 |
n = nb_sectors; |
1134 |
} |
1135 |
|
1136 |
while (sector_num - bs_offset >= bs_sectors) {
|
1137 |
bs_i ++; |
1138 |
assert (bs_i < bs_n); |
1139 |
bs_offset += bs_sectors; |
1140 |
bdrv_get_geometry(bs[bs_i], &bs_sectors); |
1141 |
/* printf("changing part: sector_num=%" PRId64 ", bs_i=%d, "
|
1142 |
"bs_offset=%" PRId64 ", bs_sectors=%" PRId64 "\n",
|
1143 |
sector_num, bs_i, bs_offset, bs_sectors); */
|
1144 |
} |
1145 |
|
1146 |
if (n > bs_offset + bs_sectors - sector_num) {
|
1147 |
n = bs_offset + bs_sectors - sector_num; |
1148 |
} |
1149 |
|
1150 |
if (has_zero_init) {
|
1151 |
/* If the output image is being created as a copy on write image,
|
1152 |
assume that sectors which are unallocated in the input image
|
1153 |
are present in both the output's and input's base images (no
|
1154 |
need to copy them). */
|
1155 |
if (out_baseimg) {
|
1156 |
if (!bdrv_is_allocated(bs[bs_i], sector_num - bs_offset,
|
1157 |
n, &n1)) { |
1158 |
sector_num += n1; |
1159 |
continue;
|
1160 |
} |
1161 |
/* The next 'n1' sectors are allocated in the input image. Copy
|
1162 |
only those as they may be followed by unallocated sectors. */
|
1163 |
n = n1; |
1164 |
} |
1165 |
} else {
|
1166 |
n1 = n; |
1167 |
} |
1168 |
|
1169 |
ret = bdrv_read(bs[bs_i], sector_num - bs_offset, buf, n); |
1170 |
if (ret < 0) { |
1171 |
error_report("error while reading sector %" PRId64 ": %s", |
1172 |
sector_num - bs_offset, strerror(-ret)); |
1173 |
goto out;
|
1174 |
} |
1175 |
/* NOTE: at the same time we convert, we do not write zero
|
1176 |
sectors to have a chance to compress the image. Ideally, we
|
1177 |
should add a specific call to have the info to go faster */
|
1178 |
buf1 = buf; |
1179 |
while (n > 0) { |
1180 |
/* If the output image is being created as a copy on write image,
|
1181 |
copy all sectors even the ones containing only NUL bytes,
|
1182 |
because they may differ from the sectors in the base image.
|
1183 |
|
1184 |
If the output is to a host device, we also write out
|
1185 |
sectors that are entirely 0, since whatever data was
|
1186 |
already there is garbage, not 0s. */
|
1187 |
if (!has_zero_init || out_baseimg ||
|
1188 |
is_allocated_sectors_min(buf1, n, &n1, min_sparse)) { |
1189 |
ret = bdrv_write(out_bs, sector_num, buf1, n1); |
1190 |
if (ret < 0) { |
1191 |
error_report("error while writing sector %" PRId64
|
1192 |
": %s", sector_num, strerror(-ret));
|
1193 |
goto out;
|
1194 |
} |
1195 |
} |
1196 |
sector_num += n1; |
1197 |
n -= n1; |
1198 |
buf1 += n1 * 512;
|
1199 |
} |
1200 |
qemu_progress_print(local_progress, 100);
|
1201 |
} |
1202 |
} |
1203 |
out:
|
1204 |
qemu_progress_end(); |
1205 |
free_option_parameters(create_options); |
1206 |
free_option_parameters(param); |
1207 |
qemu_vfree(buf); |
1208 |
if (out_bs) {
|
1209 |
bdrv_delete(out_bs); |
1210 |
} |
1211 |
if (bs) {
|
1212 |
for (bs_i = 0; bs_i < bs_n; bs_i++) { |
1213 |
if (bs[bs_i]) {
|
1214 |
bdrv_delete(bs[bs_i]); |
1215 |
} |
1216 |
} |
1217 |
g_free(bs); |
1218 |
} |
1219 |
if (ret) {
|
1220 |
return 1; |
1221 |
} |
1222 |
return 0; |
1223 |
} |
1224 |
|
1225 |
|
1226 |
static void dump_snapshots(BlockDriverState *bs) |
1227 |
{ |
1228 |
QEMUSnapshotInfo *sn_tab, *sn; |
1229 |
int nb_sns, i;
|
1230 |
char buf[256]; |
1231 |
|
1232 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
1233 |
if (nb_sns <= 0) |
1234 |
return;
|
1235 |
printf("Snapshot list:\n");
|
1236 |
printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
1237 |
for(i = 0; i < nb_sns; i++) { |
1238 |
sn = &sn_tab[i]; |
1239 |
printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
1240 |
} |
1241 |
g_free(sn_tab); |
1242 |
} |
1243 |
|
1244 |
static void dump_json_image_info_list(ImageInfoList *list) |
1245 |
{ |
1246 |
Error *errp = NULL;
|
1247 |
QString *str; |
1248 |
QmpOutputVisitor *ov = qmp_output_visitor_new(); |
1249 |
QObject *obj; |
1250 |
visit_type_ImageInfoList(qmp_output_get_visitor(ov), |
1251 |
&list, NULL, &errp);
|
1252 |
obj = qmp_output_get_qobject(ov); |
1253 |
str = qobject_to_json_pretty(obj); |
1254 |
assert(str != NULL);
|
1255 |
printf("%s\n", qstring_get_str(str));
|
1256 |
qobject_decref(obj); |
1257 |
qmp_output_visitor_cleanup(ov); |
1258 |
QDECREF(str); |
1259 |
} |
1260 |
|
1261 |
static void collect_snapshots(BlockDriverState *bs , ImageInfo *info) |
1262 |
{ |
1263 |
int i, sn_count;
|
1264 |
QEMUSnapshotInfo *sn_tab = NULL;
|
1265 |
SnapshotInfoList *info_list, *cur_item = NULL;
|
1266 |
sn_count = bdrv_snapshot_list(bs, &sn_tab); |
1267 |
|
1268 |
for (i = 0; i < sn_count; i++) { |
1269 |
info->has_snapshots = true;
|
1270 |
info_list = g_new0(SnapshotInfoList, 1);
|
1271 |
|
1272 |
info_list->value = g_new0(SnapshotInfo, 1);
|
1273 |
info_list->value->id = g_strdup(sn_tab[i].id_str); |
1274 |
info_list->value->name = g_strdup(sn_tab[i].name); |
1275 |
info_list->value->vm_state_size = sn_tab[i].vm_state_size; |
1276 |
info_list->value->date_sec = sn_tab[i].date_sec; |
1277 |
info_list->value->date_nsec = sn_tab[i].date_nsec; |
1278 |
info_list->value->vm_clock_sec = sn_tab[i].vm_clock_nsec / 1000000000;
|
1279 |
info_list->value->vm_clock_nsec = sn_tab[i].vm_clock_nsec % 1000000000;
|
1280 |
|
1281 |
/* XXX: waiting for the qapi to support qemu-queue.h types */
|
1282 |
if (!cur_item) {
|
1283 |
info->snapshots = cur_item = info_list; |
1284 |
} else {
|
1285 |
cur_item->next = info_list; |
1286 |
cur_item = info_list; |
1287 |
} |
1288 |
|
1289 |
} |
1290 |
|
1291 |
g_free(sn_tab); |
1292 |
} |
1293 |
|
1294 |
static void dump_json_image_info(ImageInfo *info) |
1295 |
{ |
1296 |
Error *errp = NULL;
|
1297 |
QString *str; |
1298 |
QmpOutputVisitor *ov = qmp_output_visitor_new(); |
1299 |
QObject *obj; |
1300 |
visit_type_ImageInfo(qmp_output_get_visitor(ov), |
1301 |
&info, NULL, &errp);
|
1302 |
obj = qmp_output_get_qobject(ov); |
1303 |
str = qobject_to_json_pretty(obj); |
1304 |
assert(str != NULL);
|
1305 |
printf("%s\n", qstring_get_str(str));
|
1306 |
qobject_decref(obj); |
1307 |
qmp_output_visitor_cleanup(ov); |
1308 |
QDECREF(str); |
1309 |
} |
1310 |
|
1311 |
static void collect_image_info(BlockDriverState *bs, |
1312 |
ImageInfo *info, |
1313 |
const char *filename, |
1314 |
const char *fmt) |
1315 |
{ |
1316 |
uint64_t total_sectors; |
1317 |
char backing_filename[1024]; |
1318 |
char backing_filename2[1024]; |
1319 |
BlockDriverInfo bdi; |
1320 |
|
1321 |
bdrv_get_geometry(bs, &total_sectors); |
1322 |
|
1323 |
info->filename = g_strdup(filename); |
1324 |
info->format = g_strdup(bdrv_get_format_name(bs)); |
1325 |
info->virtual_size = total_sectors * 512;
|
1326 |
info->actual_size = bdrv_get_allocated_file_size(bs); |
1327 |
info->has_actual_size = info->actual_size >= 0;
|
1328 |
if (bdrv_is_encrypted(bs)) {
|
1329 |
info->encrypted = true;
|
1330 |
info->has_encrypted = true;
|
1331 |
} |
1332 |
if (bdrv_get_info(bs, &bdi) >= 0) { |
1333 |
if (bdi.cluster_size != 0) { |
1334 |
info->cluster_size = bdi.cluster_size; |
1335 |
info->has_cluster_size = true;
|
1336 |
} |
1337 |
info->dirty_flag = bdi.is_dirty; |
1338 |
info->has_dirty_flag = true;
|
1339 |
} |
1340 |
bdrv_get_backing_filename(bs, backing_filename, sizeof(backing_filename));
|
1341 |
if (backing_filename[0] != '\0') { |
1342 |
info->backing_filename = g_strdup(backing_filename); |
1343 |
info->has_backing_filename = true;
|
1344 |
bdrv_get_full_backing_filename(bs, backing_filename2, |
1345 |
sizeof(backing_filename2));
|
1346 |
|
1347 |
if (strcmp(backing_filename, backing_filename2) != 0) { |
1348 |
info->full_backing_filename = |
1349 |
g_strdup(backing_filename2); |
1350 |
info->has_full_backing_filename = true;
|
1351 |
} |
1352 |
|
1353 |
if (bs->backing_format[0]) { |
1354 |
info->backing_filename_format = g_strdup(bs->backing_format); |
1355 |
info->has_backing_filename_format = true;
|
1356 |
} |
1357 |
} |
1358 |
} |
1359 |
|
1360 |
static void dump_human_image_info(ImageInfo *info) |
1361 |
{ |
1362 |
char size_buf[128], dsize_buf[128]; |
1363 |
if (!info->has_actual_size) {
|
1364 |
snprintf(dsize_buf, sizeof(dsize_buf), "unavailable"); |
1365 |
} else {
|
1366 |
get_human_readable_size(dsize_buf, sizeof(dsize_buf),
|
1367 |
info->actual_size); |
1368 |
} |
1369 |
get_human_readable_size(size_buf, sizeof(size_buf), info->virtual_size);
|
1370 |
printf("image: %s\n"
|
1371 |
"file format: %s\n"
|
1372 |
"virtual size: %s (%" PRId64 " bytes)\n" |
1373 |
"disk size: %s\n",
|
1374 |
info->filename, info->format, size_buf, |
1375 |
info->virtual_size, |
1376 |
dsize_buf); |
1377 |
|
1378 |
if (info->has_encrypted && info->encrypted) {
|
1379 |
printf("encrypted: yes\n");
|
1380 |
} |
1381 |
|
1382 |
if (info->has_cluster_size) {
|
1383 |
printf("cluster_size: %" PRId64 "\n", info->cluster_size); |
1384 |
} |
1385 |
|
1386 |
if (info->has_dirty_flag && info->dirty_flag) {
|
1387 |
printf("cleanly shut down: no\n");
|
1388 |
} |
1389 |
|
1390 |
if (info->has_backing_filename) {
|
1391 |
printf("backing file: %s", info->backing_filename);
|
1392 |
if (info->has_full_backing_filename) {
|
1393 |
printf(" (actual path: %s)", info->full_backing_filename);
|
1394 |
} |
1395 |
putchar('\n');
|
1396 |
if (info->has_backing_filename_format) {
|
1397 |
printf("backing file format: %s\n", info->backing_filename_format);
|
1398 |
} |
1399 |
} |
1400 |
|
1401 |
if (info->has_snapshots) {
|
1402 |
SnapshotInfoList *elem; |
1403 |
char buf[256]; |
1404 |
|
1405 |
printf("Snapshot list:\n");
|
1406 |
printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
1407 |
|
1408 |
/* Ideally bdrv_snapshot_dump() would operate on SnapshotInfoList but
|
1409 |
* we convert to the block layer's native QEMUSnapshotInfo for now.
|
1410 |
*/
|
1411 |
for (elem = info->snapshots; elem; elem = elem->next) {
|
1412 |
QEMUSnapshotInfo sn = { |
1413 |
.vm_state_size = elem->value->vm_state_size, |
1414 |
.date_sec = elem->value->date_sec, |
1415 |
.date_nsec = elem->value->date_nsec, |
1416 |
.vm_clock_nsec = elem->value->vm_clock_sec * 1000000000ULL +
|
1417 |
elem->value->vm_clock_nsec, |
1418 |
}; |
1419 |
|
1420 |
pstrcpy(sn.id_str, sizeof(sn.id_str), elem->value->id);
|
1421 |
pstrcpy(sn.name, sizeof(sn.name), elem->value->name);
|
1422 |
printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), &sn)); |
1423 |
} |
1424 |
} |
1425 |
} |
1426 |
|
1427 |
static void dump_human_image_info_list(ImageInfoList *list) |
1428 |
{ |
1429 |
ImageInfoList *elem; |
1430 |
bool delim = false; |
1431 |
|
1432 |
for (elem = list; elem; elem = elem->next) {
|
1433 |
if (delim) {
|
1434 |
printf("\n");
|
1435 |
} |
1436 |
delim = true;
|
1437 |
|
1438 |
dump_human_image_info(elem->value); |
1439 |
} |
1440 |
} |
1441 |
|
1442 |
static gboolean str_equal_func(gconstpointer a, gconstpointer b)
|
1443 |
{ |
1444 |
return strcmp(a, b) == 0; |
1445 |
} |
1446 |
|
1447 |
/**
|
1448 |
* Open an image file chain and return an ImageInfoList
|
1449 |
*
|
1450 |
* @filename: topmost image filename
|
1451 |
* @fmt: topmost image format (may be NULL to autodetect)
|
1452 |
* @chain: true - enumerate entire backing file chain
|
1453 |
* false - only topmost image file
|
1454 |
*
|
1455 |
* Returns a list of ImageInfo objects or NULL if there was an error opening an
|
1456 |
* image file. If there was an error a message will have been printed to
|
1457 |
* stderr.
|
1458 |
*/
|
1459 |
static ImageInfoList *collect_image_info_list(const char *filename, |
1460 |
const char *fmt, |
1461 |
bool chain)
|
1462 |
{ |
1463 |
ImageInfoList *head = NULL;
|
1464 |
ImageInfoList **last = &head; |
1465 |
GHashTable *filenames; |
1466 |
|
1467 |
filenames = g_hash_table_new_full(g_str_hash, str_equal_func, NULL, NULL); |
1468 |
|
1469 |
while (filename) {
|
1470 |
BlockDriverState *bs; |
1471 |
ImageInfo *info; |
1472 |
ImageInfoList *elem; |
1473 |
|
1474 |
if (g_hash_table_lookup_extended(filenames, filename, NULL, NULL)) { |
1475 |
error_report("Backing file '%s' creates an infinite loop.",
|
1476 |
filename); |
1477 |
goto err;
|
1478 |
} |
1479 |
g_hash_table_insert(filenames, (gpointer)filename, NULL);
|
1480 |
|
1481 |
bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_NO_BACKING, |
1482 |
false);
|
1483 |
if (!bs) {
|
1484 |
goto err;
|
1485 |
} |
1486 |
|
1487 |
info = g_new0(ImageInfo, 1);
|
1488 |
collect_image_info(bs, info, filename, fmt); |
1489 |
collect_snapshots(bs, info); |
1490 |
|
1491 |
elem = g_new0(ImageInfoList, 1);
|
1492 |
elem->value = info; |
1493 |
*last = elem; |
1494 |
last = &elem->next; |
1495 |
|
1496 |
bdrv_delete(bs); |
1497 |
|
1498 |
filename = fmt = NULL;
|
1499 |
if (chain) {
|
1500 |
if (info->has_full_backing_filename) {
|
1501 |
filename = info->full_backing_filename; |
1502 |
} else if (info->has_backing_filename) { |
1503 |
filename = info->backing_filename; |
1504 |
} |
1505 |
if (info->has_backing_filename_format) {
|
1506 |
fmt = info->backing_filename_format; |
1507 |
} |
1508 |
} |
1509 |
} |
1510 |
g_hash_table_destroy(filenames); |
1511 |
return head;
|
1512 |
|
1513 |
err:
|
1514 |
qapi_free_ImageInfoList(head); |
1515 |
g_hash_table_destroy(filenames); |
1516 |
return NULL; |
1517 |
} |
1518 |
|
1519 |
static int img_info(int argc, char **argv) |
1520 |
{ |
1521 |
int c;
|
1522 |
OutputFormat output_format = OFORMAT_HUMAN; |
1523 |
bool chain = false; |
1524 |
const char *filename, *fmt, *output; |
1525 |
ImageInfoList *list; |
1526 |
|
1527 |
fmt = NULL;
|
1528 |
output = NULL;
|
1529 |
for(;;) {
|
1530 |
int option_index = 0; |
1531 |
static const struct option long_options[] = { |
1532 |
{"help", no_argument, 0, 'h'}, |
1533 |
{"format", required_argument, 0, 'f'}, |
1534 |
{"output", required_argument, 0, OPTION_OUTPUT}, |
1535 |
{"backing-chain", no_argument, 0, OPTION_BACKING_CHAIN}, |
1536 |
{0, 0, 0, 0} |
1537 |
}; |
1538 |
c = getopt_long(argc, argv, "f:h",
|
1539 |
long_options, &option_index); |
1540 |
if (c == -1) { |
1541 |
break;
|
1542 |
} |
1543 |
switch(c) {
|
1544 |
case '?': |
1545 |
case 'h': |
1546 |
help(); |
1547 |
break;
|
1548 |
case 'f': |
1549 |
fmt = optarg; |
1550 |
break;
|
1551 |
case OPTION_OUTPUT:
|
1552 |
output = optarg; |
1553 |
break;
|
1554 |
case OPTION_BACKING_CHAIN:
|
1555 |
chain = true;
|
1556 |
break;
|
1557 |
} |
1558 |
} |
1559 |
if (optind >= argc) {
|
1560 |
help(); |
1561 |
} |
1562 |
filename = argv[optind++]; |
1563 |
|
1564 |
if (output && !strcmp(output, "json")) { |
1565 |
output_format = OFORMAT_JSON; |
1566 |
} else if (output && !strcmp(output, "human")) { |
1567 |
output_format = OFORMAT_HUMAN; |
1568 |
} else if (output) { |
1569 |
error_report("--output must be used with human or json as argument.");
|
1570 |
return 1; |
1571 |
} |
1572 |
|
1573 |
list = collect_image_info_list(filename, fmt, chain); |
1574 |
if (!list) {
|
1575 |
return 1; |
1576 |
} |
1577 |
|
1578 |
switch (output_format) {
|
1579 |
case OFORMAT_HUMAN:
|
1580 |
dump_human_image_info_list(list); |
1581 |
break;
|
1582 |
case OFORMAT_JSON:
|
1583 |
if (chain) {
|
1584 |
dump_json_image_info_list(list); |
1585 |
} else {
|
1586 |
dump_json_image_info(list->value); |
1587 |
} |
1588 |
break;
|
1589 |
} |
1590 |
|
1591 |
qapi_free_ImageInfoList(list); |
1592 |
return 0; |
1593 |
} |
1594 |
|
1595 |
#define SNAPSHOT_LIST 1 |
1596 |
#define SNAPSHOT_CREATE 2 |
1597 |
#define SNAPSHOT_APPLY 3 |
1598 |
#define SNAPSHOT_DELETE 4 |
1599 |
|
1600 |
static int img_snapshot(int argc, char **argv) |
1601 |
{ |
1602 |
BlockDriverState *bs; |
1603 |
QEMUSnapshotInfo sn; |
1604 |
char *filename, *snapshot_name = NULL; |
1605 |
int c, ret = 0, bdrv_oflags; |
1606 |
int action = 0; |
1607 |
qemu_timeval tv; |
1608 |
|
1609 |
bdrv_oflags = BDRV_O_FLAGS | BDRV_O_RDWR; |
1610 |
/* Parse commandline parameters */
|
1611 |
for(;;) {
|
1612 |
c = getopt(argc, argv, "la:c:d:h");
|
1613 |
if (c == -1) { |
1614 |
break;
|
1615 |
} |
1616 |
switch(c) {
|
1617 |
case '?': |
1618 |
case 'h': |
1619 |
help(); |
1620 |
return 0; |
1621 |
case 'l': |
1622 |
if (action) {
|
1623 |
help(); |
1624 |
return 0; |
1625 |
} |
1626 |
action = SNAPSHOT_LIST; |
1627 |
bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */
|
1628 |
break;
|
1629 |
case 'a': |
1630 |
if (action) {
|
1631 |
help(); |
1632 |
return 0; |
1633 |
} |
1634 |
action = SNAPSHOT_APPLY; |
1635 |
snapshot_name = optarg; |
1636 |
break;
|
1637 |
case 'c': |
1638 |
if (action) {
|
1639 |
help(); |
1640 |
return 0; |
1641 |
} |
1642 |
action = SNAPSHOT_CREATE; |
1643 |
snapshot_name = optarg; |
1644 |
break;
|
1645 |
case 'd': |
1646 |
if (action) {
|
1647 |
help(); |
1648 |
return 0; |
1649 |
} |
1650 |
action = SNAPSHOT_DELETE; |
1651 |
snapshot_name = optarg; |
1652 |
break;
|
1653 |
} |
1654 |
} |
1655 |
|
1656 |
if (optind >= argc) {
|
1657 |
help(); |
1658 |
} |
1659 |
filename = argv[optind++]; |
1660 |
|
1661 |
/* Open the image */
|
1662 |
bs = bdrv_new_open(filename, NULL, bdrv_oflags, true); |
1663 |
if (!bs) {
|
1664 |
return 1; |
1665 |
} |
1666 |
|
1667 |
/* Perform the requested action */
|
1668 |
switch(action) {
|
1669 |
case SNAPSHOT_LIST:
|
1670 |
dump_snapshots(bs); |
1671 |
break;
|
1672 |
|
1673 |
case SNAPSHOT_CREATE:
|
1674 |
memset(&sn, 0, sizeof(sn)); |
1675 |
pstrcpy(sn.name, sizeof(sn.name), snapshot_name);
|
1676 |
|
1677 |
qemu_gettimeofday(&tv); |
1678 |
sn.date_sec = tv.tv_sec; |
1679 |
sn.date_nsec = tv.tv_usec * 1000;
|
1680 |
|
1681 |
ret = bdrv_snapshot_create(bs, &sn); |
1682 |
if (ret) {
|
1683 |
error_report("Could not create snapshot '%s': %d (%s)",
|
1684 |
snapshot_name, ret, strerror(-ret)); |
1685 |
} |
1686 |
break;
|
1687 |
|
1688 |
case SNAPSHOT_APPLY:
|
1689 |
ret = bdrv_snapshot_goto(bs, snapshot_name); |
1690 |
if (ret) {
|
1691 |
error_report("Could not apply snapshot '%s': %d (%s)",
|
1692 |
snapshot_name, ret, strerror(-ret)); |
1693 |
} |
1694 |
break;
|
1695 |
|
1696 |
case SNAPSHOT_DELETE:
|
1697 |
ret = bdrv_snapshot_delete(bs, snapshot_name); |
1698 |
if (ret) {
|
1699 |
error_report("Could not delete snapshot '%s': %d (%s)",
|
1700 |
snapshot_name, ret, strerror(-ret)); |
1701 |
} |
1702 |
break;
|
1703 |
} |
1704 |
|
1705 |
/* Cleanup */
|
1706 |
bdrv_delete(bs); |
1707 |
if (ret) {
|
1708 |
return 1; |
1709 |
} |
1710 |
return 0; |
1711 |
} |
1712 |
|
1713 |
static int img_rebase(int argc, char **argv) |
1714 |
{ |
1715 |
BlockDriverState *bs, *bs_old_backing = NULL, *bs_new_backing = NULL; |
1716 |
BlockDriver *old_backing_drv, *new_backing_drv; |
1717 |
char *filename;
|
1718 |
const char *fmt, *cache, *out_basefmt, *out_baseimg; |
1719 |
int c, flags, ret;
|
1720 |
int unsafe = 0; |
1721 |
int progress = 0; |
1722 |
|
1723 |
/* Parse commandline parameters */
|
1724 |
fmt = NULL;
|
1725 |
cache = BDRV_DEFAULT_CACHE; |
1726 |
out_baseimg = NULL;
|
1727 |
out_basefmt = NULL;
|
1728 |
for(;;) {
|
1729 |
c = getopt(argc, argv, "uhf:F:b:pt:");
|
1730 |
if (c == -1) { |
1731 |
break;
|
1732 |
} |
1733 |
switch(c) {
|
1734 |
case '?': |
1735 |
case 'h': |
1736 |
help(); |
1737 |
return 0; |
1738 |
case 'f': |
1739 |
fmt = optarg; |
1740 |
break;
|
1741 |
case 'F': |
1742 |
out_basefmt = optarg; |
1743 |
break;
|
1744 |
case 'b': |
1745 |
out_baseimg = optarg; |
1746 |
break;
|
1747 |
case 'u': |
1748 |
unsafe = 1;
|
1749 |
break;
|
1750 |
case 'p': |
1751 |
progress = 1;
|
1752 |
break;
|
1753 |
case 't': |
1754 |
cache = optarg; |
1755 |
break;
|
1756 |
} |
1757 |
} |
1758 |
|
1759 |
if ((optind >= argc) || (!unsafe && !out_baseimg)) {
|
1760 |
help(); |
1761 |
} |
1762 |
filename = argv[optind++]; |
1763 |
|
1764 |
qemu_progress_init(progress, 2.0); |
1765 |
qemu_progress_print(0, 100); |
1766 |
|
1767 |
flags = BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0);
|
1768 |
ret = bdrv_parse_cache_flags(cache, &flags); |
1769 |
if (ret < 0) { |
1770 |
error_report("Invalid cache option: %s", cache);
|
1771 |
return -1; |
1772 |
} |
1773 |
|
1774 |
/*
|
1775 |
* Open the images.
|
1776 |
*
|
1777 |
* Ignore the old backing file for unsafe rebase in case we want to correct
|
1778 |
* the reference to a renamed or moved backing file.
|
1779 |
*/
|
1780 |
bs = bdrv_new_open(filename, fmt, flags, true);
|
1781 |
if (!bs) {
|
1782 |
return 1; |
1783 |
} |
1784 |
|
1785 |
/* Find the right drivers for the backing files */
|
1786 |
old_backing_drv = NULL;
|
1787 |
new_backing_drv = NULL;
|
1788 |
|
1789 |
if (!unsafe && bs->backing_format[0] != '\0') { |
1790 |
old_backing_drv = bdrv_find_format(bs->backing_format); |
1791 |
if (old_backing_drv == NULL) { |
1792 |
error_report("Invalid format name: '%s'", bs->backing_format);
|
1793 |
ret = -1;
|
1794 |
goto out;
|
1795 |
} |
1796 |
} |
1797 |
|
1798 |
if (out_basefmt != NULL) { |
1799 |
new_backing_drv = bdrv_find_format(out_basefmt); |
1800 |
if (new_backing_drv == NULL) { |
1801 |
error_report("Invalid format name: '%s'", out_basefmt);
|
1802 |
ret = -1;
|
1803 |
goto out;
|
1804 |
} |
1805 |
} |
1806 |
|
1807 |
/* For safe rebasing we need to compare old and new backing file */
|
1808 |
if (unsafe) {
|
1809 |
/* Make the compiler happy */
|
1810 |
bs_old_backing = NULL;
|
1811 |
bs_new_backing = NULL;
|
1812 |
} else {
|
1813 |
char backing_name[1024]; |
1814 |
|
1815 |
bs_old_backing = bdrv_new("old_backing");
|
1816 |
bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name));
|
1817 |
ret = bdrv_open(bs_old_backing, backing_name, BDRV_O_FLAGS, |
1818 |
old_backing_drv); |
1819 |
if (ret) {
|
1820 |
error_report("Could not open old backing file '%s'", backing_name);
|
1821 |
goto out;
|
1822 |
} |
1823 |
if (out_baseimg[0]) { |
1824 |
bs_new_backing = bdrv_new("new_backing");
|
1825 |
ret = bdrv_open(bs_new_backing, out_baseimg, BDRV_O_FLAGS, |
1826 |
new_backing_drv); |
1827 |
if (ret) {
|
1828 |
error_report("Could not open new backing file '%s'",
|
1829 |
out_baseimg); |
1830 |
goto out;
|
1831 |
} |
1832 |
} |
1833 |
} |
1834 |
|
1835 |
/*
|
1836 |
* Check each unallocated cluster in the COW file. If it is unallocated,
|
1837 |
* accesses go to the backing file. We must therefore compare this cluster
|
1838 |
* in the old and new backing file, and if they differ we need to copy it
|
1839 |
* from the old backing file into the COW file.
|
1840 |
*
|
1841 |
* If qemu-img crashes during this step, no harm is done. The content of
|
1842 |
* the image is the same as the original one at any time.
|
1843 |
*/
|
1844 |
if (!unsafe) {
|
1845 |
uint64_t num_sectors; |
1846 |
uint64_t old_backing_num_sectors; |
1847 |
uint64_t new_backing_num_sectors = 0;
|
1848 |
uint64_t sector; |
1849 |
int n;
|
1850 |
uint8_t * buf_old; |
1851 |
uint8_t * buf_new; |
1852 |
float local_progress = 0; |
1853 |
|
1854 |
buf_old = qemu_blockalign(bs, IO_BUF_SIZE); |
1855 |
buf_new = qemu_blockalign(bs, IO_BUF_SIZE); |
1856 |
|
1857 |
bdrv_get_geometry(bs, &num_sectors); |
1858 |
bdrv_get_geometry(bs_old_backing, &old_backing_num_sectors); |
1859 |
if (bs_new_backing) {
|
1860 |
bdrv_get_geometry(bs_new_backing, &new_backing_num_sectors); |
1861 |
} |
1862 |
|
1863 |
if (num_sectors != 0) { |
1864 |
local_progress = (float)100 / |
1865 |
(num_sectors / MIN(num_sectors, IO_BUF_SIZE / 512));
|
1866 |
} |
1867 |
|
1868 |
for (sector = 0; sector < num_sectors; sector += n) { |
1869 |
|
1870 |
/* How many sectors can we handle with the next read? */
|
1871 |
if (sector + (IO_BUF_SIZE / 512) <= num_sectors) { |
1872 |
n = (IO_BUF_SIZE / 512);
|
1873 |
} else {
|
1874 |
n = num_sectors - sector; |
1875 |
} |
1876 |
|
1877 |
/* If the cluster is allocated, we don't need to take action */
|
1878 |
ret = bdrv_is_allocated(bs, sector, n, &n); |
1879 |
if (ret) {
|
1880 |
continue;
|
1881 |
} |
1882 |
|
1883 |
/*
|
1884 |
* Read old and new backing file and take into consideration that
|
1885 |
* backing files may be smaller than the COW image.
|
1886 |
*/
|
1887 |
if (sector >= old_backing_num_sectors) {
|
1888 |
memset(buf_old, 0, n * BDRV_SECTOR_SIZE);
|
1889 |
} else {
|
1890 |
if (sector + n > old_backing_num_sectors) {
|
1891 |
n = old_backing_num_sectors - sector; |
1892 |
} |
1893 |
|
1894 |
ret = bdrv_read(bs_old_backing, sector, buf_old, n); |
1895 |
if (ret < 0) { |
1896 |
error_report("error while reading from old backing file");
|
1897 |
goto out;
|
1898 |
} |
1899 |
} |
1900 |
|
1901 |
if (sector >= new_backing_num_sectors || !bs_new_backing) {
|
1902 |
memset(buf_new, 0, n * BDRV_SECTOR_SIZE);
|
1903 |
} else {
|
1904 |
if (sector + n > new_backing_num_sectors) {
|
1905 |
n = new_backing_num_sectors - sector; |
1906 |
} |
1907 |
|
1908 |
ret = bdrv_read(bs_new_backing, sector, buf_new, n); |
1909 |
if (ret < 0) { |
1910 |
error_report("error while reading from new backing file");
|
1911 |
goto out;
|
1912 |
} |
1913 |
} |
1914 |
|
1915 |
/* If they differ, we need to write to the COW file */
|
1916 |
uint64_t written = 0;
|
1917 |
|
1918 |
while (written < n) {
|
1919 |
int pnum;
|
1920 |
|
1921 |
if (compare_sectors(buf_old + written * 512, |
1922 |
buf_new + written * 512, n - written, &pnum))
|
1923 |
{ |
1924 |
ret = bdrv_write(bs, sector + written, |
1925 |
buf_old + written * 512, pnum);
|
1926 |
if (ret < 0) { |
1927 |
error_report("Error while writing to COW image: %s",
|
1928 |
strerror(-ret)); |
1929 |
goto out;
|
1930 |
} |
1931 |
} |
1932 |
|
1933 |
written += pnum; |
1934 |
} |
1935 |
qemu_progress_print(local_progress, 100);
|
1936 |
} |
1937 |
|
1938 |
qemu_vfree(buf_old); |
1939 |
qemu_vfree(buf_new); |
1940 |
} |
1941 |
|
1942 |
/*
|
1943 |
* Change the backing file. All clusters that are different from the old
|
1944 |
* backing file are overwritten in the COW file now, so the visible content
|
1945 |
* doesn't change when we switch the backing file.
|
1946 |
*/
|
1947 |
if (out_baseimg && *out_baseimg) {
|
1948 |
ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt); |
1949 |
} else {
|
1950 |
ret = bdrv_change_backing_file(bs, NULL, NULL); |
1951 |
} |
1952 |
|
1953 |
if (ret == -ENOSPC) {
|
1954 |
error_report("Could not change the backing file to '%s': No "
|
1955 |
"space left in the file header", out_baseimg);
|
1956 |
} else if (ret < 0) { |
1957 |
error_report("Could not change the backing file to '%s': %s",
|
1958 |
out_baseimg, strerror(-ret)); |
1959 |
} |
1960 |
|
1961 |
qemu_progress_print(100, 0); |
1962 |
/*
|
1963 |
* TODO At this point it is possible to check if any clusters that are
|
1964 |
* allocated in the COW file are the same in the backing file. If so, they
|
1965 |
* could be dropped from the COW file. Don't do this before switching the
|
1966 |
* backing file, in case of a crash this would lead to corruption.
|
1967 |
*/
|
1968 |
out:
|
1969 |
qemu_progress_end(); |
1970 |
/* Cleanup */
|
1971 |
if (!unsafe) {
|
1972 |
if (bs_old_backing != NULL) { |
1973 |
bdrv_delete(bs_old_backing); |
1974 |
} |
1975 |
if (bs_new_backing != NULL) { |
1976 |
bdrv_delete(bs_new_backing); |
1977 |
} |
1978 |
} |
1979 |
|
1980 |
bdrv_delete(bs); |
1981 |
if (ret) {
|
1982 |
return 1; |
1983 |
} |
1984 |
return 0; |
1985 |
} |
1986 |
|
1987 |
static int img_resize(int argc, char **argv) |
1988 |
{ |
1989 |
int c, ret, relative;
|
1990 |
const char *filename, *fmt, *size; |
1991 |
int64_t n, total_size; |
1992 |
BlockDriverState *bs = NULL;
|
1993 |
QemuOpts *param; |
1994 |
static QemuOptsList resize_options = {
|
1995 |
.name = "resize_options",
|
1996 |
.head = QTAILQ_HEAD_INITIALIZER(resize_options.head), |
1997 |
.desc = { |
1998 |
{ |
1999 |
.name = BLOCK_OPT_SIZE, |
2000 |
.type = QEMU_OPT_SIZE, |
2001 |
.help = "Virtual disk size"
|
2002 |
}, { |
2003 |
/* end of list */
|
2004 |
} |
2005 |
}, |
2006 |
}; |
2007 |
|
2008 |
/* Remove size from argv manually so that negative numbers are not treated
|
2009 |
* as options by getopt. */
|
2010 |
if (argc < 3) { |
2011 |
help(); |
2012 |
return 1; |
2013 |
} |
2014 |
|
2015 |
size = argv[--argc]; |
2016 |
|
2017 |
/* Parse getopt arguments */
|
2018 |
fmt = NULL;
|
2019 |
for(;;) {
|
2020 |
c = getopt(argc, argv, "f:h");
|
2021 |
if (c == -1) { |
2022 |
break;
|
2023 |
} |
2024 |
switch(c) {
|
2025 |
case '?': |
2026 |
case 'h': |
2027 |
help(); |
2028 |
break;
|
2029 |
case 'f': |
2030 |
fmt = optarg; |
2031 |
break;
|
2032 |
} |
2033 |
} |
2034 |
if (optind >= argc) {
|
2035 |
help(); |
2036 |
} |
2037 |
filename = argv[optind++]; |
2038 |
|
2039 |
/* Choose grow, shrink, or absolute resize mode */
|
2040 |
switch (size[0]) { |
2041 |
case '+': |
2042 |
relative = 1;
|
2043 |
size++; |
2044 |
break;
|
2045 |
case '-': |
2046 |
relative = -1;
|
2047 |
size++; |
2048 |
break;
|
2049 |
default:
|
2050 |
relative = 0;
|
2051 |
break;
|
2052 |
} |
2053 |
|
2054 |
/* Parse size */
|
2055 |
param = qemu_opts_create_nofail(&resize_options); |
2056 |
if (qemu_opt_set(param, BLOCK_OPT_SIZE, size)) {
|
2057 |
/* Error message already printed when size parsing fails */
|
2058 |
ret = -1;
|
2059 |
qemu_opts_del(param); |
2060 |
goto out;
|
2061 |
} |
2062 |
n = qemu_opt_get_size(param, BLOCK_OPT_SIZE, 0);
|
2063 |
qemu_opts_del(param); |
2064 |
|
2065 |
bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR, true);
|
2066 |
if (!bs) {
|
2067 |
ret = -1;
|
2068 |
goto out;
|
2069 |
} |
2070 |
|
2071 |
if (relative) {
|
2072 |
total_size = bdrv_getlength(bs) + n * relative; |
2073 |
} else {
|
2074 |
total_size = n; |
2075 |
} |
2076 |
if (total_size <= 0) { |
2077 |
error_report("New image size must be positive");
|
2078 |
ret = -1;
|
2079 |
goto out;
|
2080 |
} |
2081 |
|
2082 |
ret = bdrv_truncate(bs, total_size); |
2083 |
switch (ret) {
|
2084 |
case 0: |
2085 |
printf("Image resized.\n");
|
2086 |
break;
|
2087 |
case -ENOTSUP:
|
2088 |
error_report("This image does not support resize");
|
2089 |
break;
|
2090 |
case -EACCES:
|
2091 |
error_report("Image is read-only");
|
2092 |
break;
|
2093 |
default:
|
2094 |
error_report("Error resizing image (%d)", -ret);
|
2095 |
break;
|
2096 |
} |
2097 |
out:
|
2098 |
if (bs) {
|
2099 |
bdrv_delete(bs); |
2100 |
} |
2101 |
if (ret) {
|
2102 |
return 1; |
2103 |
} |
2104 |
return 0; |
2105 |
} |
2106 |
|
2107 |
static const img_cmd_t img_cmds[] = { |
2108 |
#define DEF(option, callback, arg_string) \
|
2109 |
{ option, callback }, |
2110 |
#include "qemu-img-cmds.h" |
2111 |
#undef DEF
|
2112 |
#undef GEN_DOCS
|
2113 |
{ NULL, NULL, }, |
2114 |
}; |
2115 |
|
2116 |
int main(int argc, char **argv) |
2117 |
{ |
2118 |
const img_cmd_t *cmd;
|
2119 |
const char *cmdname; |
2120 |
|
2121 |
error_set_progname(argv[0]);
|
2122 |
|
2123 |
qemu_init_main_loop(); |
2124 |
bdrv_init(); |
2125 |
if (argc < 2) |
2126 |
help(); |
2127 |
cmdname = argv[1];
|
2128 |
argc--; argv++; |
2129 |
|
2130 |
/* find the command */
|
2131 |
for(cmd = img_cmds; cmd->name != NULL; cmd++) { |
2132 |
if (!strcmp(cmdname, cmd->name)) {
|
2133 |
return cmd->handler(argc, argv);
|
2134 |
} |
2135 |
} |
2136 |
|
2137 |
/* not found */
|
2138 |
help(); |
2139 |
return 0; |
2140 |
} |