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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" |
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#include "qapi/qmp/qjson.h" |
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#include "qemu-common.h" |
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#include "qemu/option.h" |
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#include "qemu/error-report.h" |
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#include "qemu/osdep.h" |
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#include "sysemu/sysemu.h" |
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#include "block/block_int.h" |
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#include <getopt.h> |
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#include <stdio.h> |
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#include <stdarg.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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enum {
|
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OPTION_OUTPUT = 256,
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OPTION_BACKING_CHAIN = 257,
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}; |
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|
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typedef enum OutputFormat { |
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OFORMAT_JSON, |
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OFORMAT_HUMAN, |
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} OutputFormat; |
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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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static void format_print(void *opaque, const char *name) |
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{ |
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printf(" %s", name);
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} |
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|
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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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" '-q' use Quiet mode - do not print any output (except errors)\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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"\n"
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"Parameters to compare subcommand:\n"
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" '-f' first image format\n"
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" '-F' second image format\n"
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" '-s' run in Strict mode - fail on different image size or sector allocation\n";
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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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static int qprintf(bool quiet, const char *fmt, ...) |
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{ |
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int ret = 0; |
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if (!quiet) {
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va_list args; |
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va_start(args, fmt); |
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ret = vprintf(fmt, args); |
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va_end(args); |
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} |
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return ret;
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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); |
148 |
i = 0;
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for(;;) {
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c = getchar(); |
151 |
if (c == '\n') |
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break;
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if (i < (buf_size - 1)) |
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buf[i++] = c; |
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} |
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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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} |
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static void term_init(void) |
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{ |
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struct termios tty;
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tcgetattr (0, &tty);
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oldtty = tty; |
177 |
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tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP |
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|INLCR|IGNCR|ICRNL|IXON); |
180 |
tty.c_oflag |= OPOST; |
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tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN); |
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tty.c_cflag &= ~(CSIZE|PARENB); |
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tty.c_cflag |= CS8; |
184 |
tty.c_cc[VMIN] = 1;
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tty.c_cc[VTIME] = 0;
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tcsetattr (0, TCSANOW, &tty);
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atexit(term_exit); |
190 |
} |
191 |
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static int read_password(char *buf, int buf_size) |
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{ |
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uint8_t ch; |
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int i, ret;
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printf("password: ");
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fflush(stdout); |
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term_init(); |
200 |
i = 0;
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for(;;) {
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ret = read(0, &ch, 1); |
203 |
if (ret == -1) { |
204 |
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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} |
210 |
} else if (ret == 0) { |
211 |
ret = -1;
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break;
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} else {
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if (ch == '\r') { |
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ret = 0;
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break;
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} |
218 |
if (i < (buf_size - 1)) |
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buf[i++] = ch; |
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} |
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} |
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term_exit(); |
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buf[i] = '\0';
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printf("\n");
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return ret;
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} |
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#endif
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static int print_block_option_help(const char *filename, const char *fmt) |
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{ |
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BlockDriver *drv, *proto_drv; |
232 |
QEMUOptionParameter *create_options = NULL;
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/* Find driver and parse its options */
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drv = bdrv_find_format(fmt); |
236 |
if (!drv) {
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error_report("Unknown file format '%s'", fmt);
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return 1; |
239 |
} |
240 |
|
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proto_drv = bdrv_find_protocol(filename); |
242 |
if (!proto_drv) {
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error_report("Unknown protocol '%s'", filename);
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return 1; |
245 |
} |
246 |
|
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create_options = append_option_parameters(create_options, |
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drv->create_options); |
249 |
create_options = append_option_parameters(create_options, |
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proto_drv->create_options); |
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print_option_help(create_options); |
252 |
free_option_parameters(create_options); |
253 |
return 0; |
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} |
255 |
|
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static BlockDriverState *bdrv_new_open(const char *filename, |
257 |
const char *fmt, |
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int flags,
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bool require_io,
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bool quiet)
|
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{ |
262 |
BlockDriverState *bs; |
263 |
BlockDriver *drv; |
264 |
char password[256]; |
265 |
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); |
271 |
if (!drv) {
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error_report("Unknown file format '%s'", fmt);
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goto fail;
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} |
275 |
} else {
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drv = NULL;
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} |
278 |
|
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ret = bdrv_open(bs, filename, NULL, flags, drv);
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if (ret < 0) { |
281 |
error_report("Could not open '%s': %s", filename, strerror(-ret));
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goto fail;
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} |
284 |
|
285 |
if (bdrv_is_encrypted(bs) && require_io) {
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qprintf(quiet, "Disk image '%s' is encrypted.\n", filename);
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287 |
if (read_password(password, sizeof(password)) < 0) { |
288 |
error_report("No password given");
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goto fail;
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} |
291 |
if (bdrv_set_key(bs, password) < 0) { |
292 |
error_report("invalid password");
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goto fail;
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294 |
} |
295 |
} |
296 |
return bs;
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297 |
fail:
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298 |
if (bs) {
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bdrv_delete(bs); |
300 |
} |
301 |
return NULL; |
302 |
} |
303 |
|
304 |
static int add_old_style_options(const char *fmt, QEMUOptionParameter *list, |
305 |
const char *base_filename, |
306 |
const char *base_fmt) |
307 |
{ |
308 |
if (base_filename) {
|
309 |
if (set_option_parameter(list, BLOCK_OPT_BACKING_FILE, base_filename)) {
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310 |
error_report("Backing file not supported for file format '%s'",
|
311 |
fmt); |
312 |
return -1; |
313 |
} |
314 |
} |
315 |
if (base_fmt) {
|
316 |
if (set_option_parameter(list, BLOCK_OPT_BACKING_FMT, base_fmt)) {
|
317 |
error_report("Backing file format not supported for file "
|
318 |
"format '%s'", fmt);
|
319 |
return -1; |
320 |
} |
321 |
} |
322 |
return 0; |
323 |
} |
324 |
|
325 |
static int img_create(int argc, char **argv) |
326 |
{ |
327 |
int c;
|
328 |
uint64_t img_size = -1;
|
329 |
const char *fmt = "raw"; |
330 |
const char *base_fmt = NULL; |
331 |
const char *filename; |
332 |
const char *base_filename = NULL; |
333 |
char *options = NULL; |
334 |
Error *local_err = NULL;
|
335 |
bool quiet = false; |
336 |
|
337 |
for(;;) {
|
338 |
c = getopt(argc, argv, "F:b:f:he6o:q");
|
339 |
if (c == -1) { |
340 |
break;
|
341 |
} |
342 |
switch(c) {
|
343 |
case '?': |
344 |
case 'h': |
345 |
help(); |
346 |
break;
|
347 |
case 'F': |
348 |
base_fmt = optarg; |
349 |
break;
|
350 |
case 'b': |
351 |
base_filename = optarg; |
352 |
break;
|
353 |
case 'f': |
354 |
fmt = optarg; |
355 |
break;
|
356 |
case 'e': |
357 |
error_report("option -e is deprecated, please use \'-o "
|
358 |
"encryption\' instead!");
|
359 |
return 1; |
360 |
case '6': |
361 |
error_report("option -6 is deprecated, please use \'-o "
|
362 |
"compat6\' instead!");
|
363 |
return 1; |
364 |
case 'o': |
365 |
options = optarg; |
366 |
break;
|
367 |
case 'q': |
368 |
quiet = true;
|
369 |
break;
|
370 |
} |
371 |
} |
372 |
|
373 |
/* Get the filename */
|
374 |
if (optind >= argc) {
|
375 |
help(); |
376 |
} |
377 |
filename = argv[optind++]; |
378 |
|
379 |
/* Get image size, if specified */
|
380 |
if (optind < argc) {
|
381 |
int64_t sval; |
382 |
char *end;
|
383 |
sval = strtosz_suffix(argv[optind++], &end, STRTOSZ_DEFSUFFIX_B); |
384 |
if (sval < 0 || *end) { |
385 |
if (sval == -ERANGE) {
|
386 |
error_report("Image size must be less than 8 EiB!");
|
387 |
} else {
|
388 |
error_report("Invalid image size specified! You may use k, M, "
|
389 |
"G or T suffixes for ");
|
390 |
error_report("kilobytes, megabytes, gigabytes and terabytes.");
|
391 |
} |
392 |
return 1; |
393 |
} |
394 |
img_size = (uint64_t)sval; |
395 |
} |
396 |
|
397 |
if (options && is_help_option(options)) {
|
398 |
return print_block_option_help(filename, fmt);
|
399 |
} |
400 |
|
401 |
bdrv_img_create(filename, fmt, base_filename, base_fmt, |
402 |
options, img_size, BDRV_O_FLAGS, &local_err, quiet); |
403 |
if (error_is_set(&local_err)) {
|
404 |
error_report("%s", error_get_pretty(local_err));
|
405 |
error_free(local_err); |
406 |
return 1; |
407 |
} |
408 |
|
409 |
return 0; |
410 |
} |
411 |
|
412 |
static void dump_json_image_check(ImageCheck *check, bool quiet) |
413 |
{ |
414 |
Error *errp = NULL;
|
415 |
QString *str; |
416 |
QmpOutputVisitor *ov = qmp_output_visitor_new(); |
417 |
QObject *obj; |
418 |
visit_type_ImageCheck(qmp_output_get_visitor(ov), |
419 |
&check, NULL, &errp);
|
420 |
obj = qmp_output_get_qobject(ov); |
421 |
str = qobject_to_json_pretty(obj); |
422 |
assert(str != NULL);
|
423 |
qprintf(quiet, "%s\n", qstring_get_str(str));
|
424 |
qobject_decref(obj); |
425 |
qmp_output_visitor_cleanup(ov); |
426 |
QDECREF(str); |
427 |
} |
428 |
|
429 |
static void dump_human_image_check(ImageCheck *check, bool quiet) |
430 |
{ |
431 |
if (!(check->corruptions || check->leaks || check->check_errors)) {
|
432 |
qprintf(quiet, "No errors were found on the image.\n");
|
433 |
} else {
|
434 |
if (check->corruptions) {
|
435 |
qprintf(quiet, "\n%" PRId64 " errors were found on the image.\n" |
436 |
"Data may be corrupted, or further writes to the image "
|
437 |
"may corrupt it.\n",
|
438 |
check->corruptions); |
439 |
} |
440 |
|
441 |
if (check->leaks) {
|
442 |
qprintf(quiet, |
443 |
"\n%" PRId64 " leaked clusters were found on the image.\n" |
444 |
"This means waste of disk space, but no harm to data.\n",
|
445 |
check->leaks); |
446 |
} |
447 |
|
448 |
if (check->check_errors) {
|
449 |
qprintf(quiet, |
450 |
"\n%" PRId64
|
451 |
" internal errors have occurred during the check.\n",
|
452 |
check->check_errors); |
453 |
} |
454 |
} |
455 |
|
456 |
if (check->total_clusters != 0 && check->allocated_clusters != 0) { |
457 |
qprintf(quiet, "%" PRId64 "/%" PRId64 " = %0.2f%% allocated, " |
458 |
"%0.2f%% fragmented, %0.2f%% compressed clusters\n",
|
459 |
check->allocated_clusters, check->total_clusters, |
460 |
check->allocated_clusters * 100.0 / check->total_clusters, |
461 |
check->fragmented_clusters * 100.0 / check->allocated_clusters, |
462 |
check->compressed_clusters * 100.0 / |
463 |
check->allocated_clusters); |
464 |
} |
465 |
|
466 |
if (check->image_end_offset) {
|
467 |
qprintf(quiet, |
468 |
"Image end offset: %" PRId64 "\n", check->image_end_offset); |
469 |
} |
470 |
} |
471 |
|
472 |
static int collect_image_check(BlockDriverState *bs, |
473 |
ImageCheck *check, |
474 |
const char *filename, |
475 |
const char *fmt, |
476 |
int fix)
|
477 |
{ |
478 |
int ret;
|
479 |
BdrvCheckResult result; |
480 |
|
481 |
ret = bdrv_check(bs, &result, fix); |
482 |
if (ret < 0) { |
483 |
return ret;
|
484 |
} |
485 |
|
486 |
check->filename = g_strdup(filename); |
487 |
check->format = g_strdup(bdrv_get_format_name(bs)); |
488 |
check->check_errors = result.check_errors; |
489 |
check->corruptions = result.corruptions; |
490 |
check->has_corruptions = result.corruptions != 0;
|
491 |
check->leaks = result.leaks; |
492 |
check->has_leaks = result.leaks != 0;
|
493 |
check->corruptions_fixed = result.corruptions_fixed; |
494 |
check->has_corruptions_fixed = result.corruptions != 0;
|
495 |
check->leaks_fixed = result.leaks_fixed; |
496 |
check->has_leaks_fixed = result.leaks != 0;
|
497 |
check->image_end_offset = result.image_end_offset; |
498 |
check->has_image_end_offset = result.image_end_offset != 0;
|
499 |
check->total_clusters = result.bfi.total_clusters; |
500 |
check->has_total_clusters = result.bfi.total_clusters != 0;
|
501 |
check->allocated_clusters = result.bfi.allocated_clusters; |
502 |
check->has_allocated_clusters = result.bfi.allocated_clusters != 0;
|
503 |
check->fragmented_clusters = result.bfi.fragmented_clusters; |
504 |
check->has_fragmented_clusters = result.bfi.fragmented_clusters != 0;
|
505 |
check->compressed_clusters = result.bfi.compressed_clusters; |
506 |
check->has_compressed_clusters = result.bfi.compressed_clusters != 0;
|
507 |
|
508 |
return 0; |
509 |
} |
510 |
|
511 |
/*
|
512 |
* Checks an image for consistency. Exit codes:
|
513 |
*
|
514 |
* 0 - Check completed, image is good
|
515 |
* 1 - Check not completed because of internal errors
|
516 |
* 2 - Check completed, image is corrupted
|
517 |
* 3 - Check completed, image has leaked clusters, but is good otherwise
|
518 |
*/
|
519 |
static int img_check(int argc, char **argv) |
520 |
{ |
521 |
int c, ret;
|
522 |
OutputFormat output_format = OFORMAT_HUMAN; |
523 |
const char *filename, *fmt, *output; |
524 |
BlockDriverState *bs; |
525 |
int fix = 0; |
526 |
int flags = BDRV_O_FLAGS | BDRV_O_CHECK;
|
527 |
ImageCheck *check; |
528 |
bool quiet = false; |
529 |
|
530 |
fmt = NULL;
|
531 |
output = NULL;
|
532 |
for(;;) {
|
533 |
int option_index = 0; |
534 |
static const struct option long_options[] = { |
535 |
{"help", no_argument, 0, 'h'}, |
536 |
{"format", required_argument, 0, 'f'}, |
537 |
{"repair", no_argument, 0, 'r'}, |
538 |
{"output", required_argument, 0, OPTION_OUTPUT}, |
539 |
{0, 0, 0, 0} |
540 |
}; |
541 |
c = getopt_long(argc, argv, "f:hr:q",
|
542 |
long_options, &option_index); |
543 |
if (c == -1) { |
544 |
break;
|
545 |
} |
546 |
switch(c) {
|
547 |
case '?': |
548 |
case 'h': |
549 |
help(); |
550 |
break;
|
551 |
case 'f': |
552 |
fmt = optarg; |
553 |
break;
|
554 |
case 'r': |
555 |
flags |= BDRV_O_RDWR; |
556 |
|
557 |
if (!strcmp(optarg, "leaks")) { |
558 |
fix = BDRV_FIX_LEAKS; |
559 |
} else if (!strcmp(optarg, "all")) { |
560 |
fix = BDRV_FIX_LEAKS | BDRV_FIX_ERRORS; |
561 |
} else {
|
562 |
help(); |
563 |
} |
564 |
break;
|
565 |
case OPTION_OUTPUT:
|
566 |
output = optarg; |
567 |
break;
|
568 |
case 'q': |
569 |
quiet = true;
|
570 |
break;
|
571 |
} |
572 |
} |
573 |
if (optind >= argc) {
|
574 |
help(); |
575 |
} |
576 |
filename = argv[optind++]; |
577 |
|
578 |
if (output && !strcmp(output, "json")) { |
579 |
output_format = OFORMAT_JSON; |
580 |
} else if (output && !strcmp(output, "human")) { |
581 |
output_format = OFORMAT_HUMAN; |
582 |
} else if (output) { |
583 |
error_report("--output must be used with human or json as argument.");
|
584 |
return 1; |
585 |
} |
586 |
|
587 |
bs = bdrv_new_open(filename, fmt, flags, true, quiet);
|
588 |
if (!bs) {
|
589 |
return 1; |
590 |
} |
591 |
|
592 |
check = g_new0(ImageCheck, 1);
|
593 |
ret = collect_image_check(bs, check, filename, fmt, fix); |
594 |
|
595 |
if (ret == -ENOTSUP) {
|
596 |
if (output_format == OFORMAT_HUMAN) {
|
597 |
error_report("This image format does not support checks");
|
598 |
} |
599 |
ret = 1;
|
600 |
goto fail;
|
601 |
} |
602 |
|
603 |
if (check->corruptions_fixed || check->leaks_fixed) {
|
604 |
int corruptions_fixed, leaks_fixed;
|
605 |
|
606 |
leaks_fixed = check->leaks_fixed; |
607 |
corruptions_fixed = check->corruptions_fixed; |
608 |
|
609 |
if (output_format == OFORMAT_HUMAN) {
|
610 |
qprintf(quiet, |
611 |
"The following inconsistencies were found and repaired:\n\n"
|
612 |
" %" PRId64 " leaked clusters\n" |
613 |
" %" PRId64 " corruptions\n\n" |
614 |
"Double checking the fixed image now...\n",
|
615 |
check->leaks_fixed, |
616 |
check->corruptions_fixed); |
617 |
} |
618 |
|
619 |
ret = collect_image_check(bs, check, filename, fmt, 0);
|
620 |
|
621 |
check->leaks_fixed = leaks_fixed; |
622 |
check->corruptions_fixed = corruptions_fixed; |
623 |
} |
624 |
|
625 |
switch (output_format) {
|
626 |
case OFORMAT_HUMAN:
|
627 |
dump_human_image_check(check, quiet); |
628 |
break;
|
629 |
case OFORMAT_JSON:
|
630 |
dump_json_image_check(check, quiet); |
631 |
break;
|
632 |
} |
633 |
|
634 |
if (ret || check->check_errors) {
|
635 |
ret = 1;
|
636 |
goto fail;
|
637 |
} |
638 |
|
639 |
if (check->corruptions) {
|
640 |
ret = 2;
|
641 |
} else if (check->leaks) { |
642 |
ret = 3;
|
643 |
} else {
|
644 |
ret = 0;
|
645 |
} |
646 |
|
647 |
fail:
|
648 |
qapi_free_ImageCheck(check); |
649 |
bdrv_delete(bs); |
650 |
|
651 |
return ret;
|
652 |
} |
653 |
|
654 |
static int img_commit(int argc, char **argv) |
655 |
{ |
656 |
int c, ret, flags;
|
657 |
const char *filename, *fmt, *cache; |
658 |
BlockDriverState *bs; |
659 |
bool quiet = false; |
660 |
|
661 |
fmt = NULL;
|
662 |
cache = BDRV_DEFAULT_CACHE; |
663 |
for(;;) {
|
664 |
c = getopt(argc, argv, "f:ht:q");
|
665 |
if (c == -1) { |
666 |
break;
|
667 |
} |
668 |
switch(c) {
|
669 |
case '?': |
670 |
case 'h': |
671 |
help(); |
672 |
break;
|
673 |
case 'f': |
674 |
fmt = optarg; |
675 |
break;
|
676 |
case 't': |
677 |
cache = optarg; |
678 |
break;
|
679 |
case 'q': |
680 |
quiet = true;
|
681 |
break;
|
682 |
} |
683 |
} |
684 |
if (optind >= argc) {
|
685 |
help(); |
686 |
} |
687 |
filename = argv[optind++]; |
688 |
|
689 |
flags = BDRV_O_RDWR; |
690 |
ret = bdrv_parse_cache_flags(cache, &flags); |
691 |
if (ret < 0) { |
692 |
error_report("Invalid cache option: %s", cache);
|
693 |
return -1; |
694 |
} |
695 |
|
696 |
bs = bdrv_new_open(filename, fmt, flags, true, quiet);
|
697 |
if (!bs) {
|
698 |
return 1; |
699 |
} |
700 |
ret = bdrv_commit(bs); |
701 |
switch(ret) {
|
702 |
case 0: |
703 |
qprintf(quiet, "Image committed.\n");
|
704 |
break;
|
705 |
case -ENOENT:
|
706 |
error_report("No disk inserted");
|
707 |
break;
|
708 |
case -EACCES:
|
709 |
error_report("Image is read-only");
|
710 |
break;
|
711 |
case -ENOTSUP:
|
712 |
error_report("Image is already committed");
|
713 |
break;
|
714 |
default:
|
715 |
error_report("Error while committing image");
|
716 |
break;
|
717 |
} |
718 |
|
719 |
bdrv_delete(bs); |
720 |
if (ret) {
|
721 |
return 1; |
722 |
} |
723 |
return 0; |
724 |
} |
725 |
|
726 |
/*
|
727 |
* Returns true iff the first sector pointed to by 'buf' contains at least
|
728 |
* a non-NUL byte.
|
729 |
*
|
730 |
* 'pnum' is set to the number of sectors (including and immediately following
|
731 |
* the first one) that are known to be in the same allocated/unallocated state.
|
732 |
*/
|
733 |
static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) |
734 |
{ |
735 |
bool is_zero;
|
736 |
int i;
|
737 |
|
738 |
if (n <= 0) { |
739 |
*pnum = 0;
|
740 |
return 0; |
741 |
} |
742 |
is_zero = buffer_is_zero(buf, 512);
|
743 |
for(i = 1; i < n; i++) { |
744 |
buf += 512;
|
745 |
if (is_zero != buffer_is_zero(buf, 512)) { |
746 |
break;
|
747 |
} |
748 |
} |
749 |
*pnum = i; |
750 |
return !is_zero;
|
751 |
} |
752 |
|
753 |
/*
|
754 |
* Like is_allocated_sectors, but if the buffer starts with a used sector,
|
755 |
* up to 'min' consecutive sectors containing zeros are ignored. This avoids
|
756 |
* breaking up write requests for only small sparse areas.
|
757 |
*/
|
758 |
static int is_allocated_sectors_min(const uint8_t *buf, int n, int *pnum, |
759 |
int min)
|
760 |
{ |
761 |
int ret;
|
762 |
int num_checked, num_used;
|
763 |
|
764 |
if (n < min) {
|
765 |
min = n; |
766 |
} |
767 |
|
768 |
ret = is_allocated_sectors(buf, n, pnum); |
769 |
if (!ret) {
|
770 |
return ret;
|
771 |
} |
772 |
|
773 |
num_used = *pnum; |
774 |
buf += BDRV_SECTOR_SIZE * *pnum; |
775 |
n -= *pnum; |
776 |
num_checked = num_used; |
777 |
|
778 |
while (n > 0) { |
779 |
ret = is_allocated_sectors(buf, n, pnum); |
780 |
|
781 |
buf += BDRV_SECTOR_SIZE * *pnum; |
782 |
n -= *pnum; |
783 |
num_checked += *pnum; |
784 |
if (ret) {
|
785 |
num_used = num_checked; |
786 |
} else if (*pnum >= min) { |
787 |
break;
|
788 |
} |
789 |
} |
790 |
|
791 |
*pnum = num_used; |
792 |
return 1; |
793 |
} |
794 |
|
795 |
/*
|
796 |
* Compares two buffers sector by sector. Returns 0 if the first sector of both
|
797 |
* buffers matches, non-zero otherwise.
|
798 |
*
|
799 |
* pnum is set to the number of sectors (including and immediately following
|
800 |
* the first one) that are known to have the same comparison result
|
801 |
*/
|
802 |
static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n, |
803 |
int *pnum)
|
804 |
{ |
805 |
int res, i;
|
806 |
|
807 |
if (n <= 0) { |
808 |
*pnum = 0;
|
809 |
return 0; |
810 |
} |
811 |
|
812 |
res = !!memcmp(buf1, buf2, 512);
|
813 |
for(i = 1; i < n; i++) { |
814 |
buf1 += 512;
|
815 |
buf2 += 512;
|
816 |
|
817 |
if (!!memcmp(buf1, buf2, 512) != res) { |
818 |
break;
|
819 |
} |
820 |
} |
821 |
|
822 |
*pnum = i; |
823 |
return res;
|
824 |
} |
825 |
|
826 |
#define IO_BUF_SIZE (2 * 1024 * 1024) |
827 |
|
828 |
static int64_t sectors_to_bytes(int64_t sectors)
|
829 |
{ |
830 |
return sectors << BDRV_SECTOR_BITS;
|
831 |
} |
832 |
|
833 |
static int64_t sectors_to_process(int64_t total, int64_t from)
|
834 |
{ |
835 |
return MIN(total - from, IO_BUF_SIZE >> BDRV_SECTOR_BITS);
|
836 |
} |
837 |
|
838 |
/*
|
839 |
* Check if passed sectors are empty (not allocated or contain only 0 bytes)
|
840 |
*
|
841 |
* Returns 0 in case sectors are filled with 0, 1 if sectors contain non-zero
|
842 |
* data and negative value on error.
|
843 |
*
|
844 |
* @param bs: Driver used for accessing file
|
845 |
* @param sect_num: Number of first sector to check
|
846 |
* @param sect_count: Number of sectors to check
|
847 |
* @param filename: Name of disk file we are checking (logging purpose)
|
848 |
* @param buffer: Allocated buffer for storing read data
|
849 |
* @param quiet: Flag for quiet mode
|
850 |
*/
|
851 |
static int check_empty_sectors(BlockDriverState *bs, int64_t sect_num, |
852 |
int sect_count, const char *filename, |
853 |
uint8_t *buffer, bool quiet)
|
854 |
{ |
855 |
int pnum, ret = 0; |
856 |
ret = bdrv_read(bs, sect_num, buffer, sect_count); |
857 |
if (ret < 0) { |
858 |
error_report("Error while reading offset %" PRId64 " of %s: %s", |
859 |
sectors_to_bytes(sect_num), filename, strerror(-ret)); |
860 |
return ret;
|
861 |
} |
862 |
ret = is_allocated_sectors(buffer, sect_count, &pnum); |
863 |
if (ret || pnum != sect_count) {
|
864 |
qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", |
865 |
sectors_to_bytes(ret ? sect_num : sect_num + pnum)); |
866 |
return 1; |
867 |
} |
868 |
|
869 |
return 0; |
870 |
} |
871 |
|
872 |
/*
|
873 |
* Compares two images. Exit codes:
|
874 |
*
|
875 |
* 0 - Images are identical
|
876 |
* 1 - Images differ
|
877 |
* >1 - Error occurred
|
878 |
*/
|
879 |
static int img_compare(int argc, char **argv) |
880 |
{ |
881 |
const char *fmt1 = NULL, *fmt2 = NULL, *filename1, *filename2; |
882 |
BlockDriverState *bs1, *bs2; |
883 |
int64_t total_sectors1, total_sectors2; |
884 |
uint8_t *buf1 = NULL, *buf2 = NULL; |
885 |
int pnum1, pnum2;
|
886 |
int allocated1, allocated2;
|
887 |
int ret = 0; /* return value - 0 Ident, 1 Different, >1 Error */ |
888 |
bool progress = false, quiet = false, strict = false; |
889 |
int64_t total_sectors; |
890 |
int64_t sector_num = 0;
|
891 |
int64_t nb_sectors; |
892 |
int c, pnum;
|
893 |
uint64_t bs_sectors; |
894 |
uint64_t progress_base; |
895 |
|
896 |
for (;;) {
|
897 |
c = getopt(argc, argv, "hpf:F:sq");
|
898 |
if (c == -1) { |
899 |
break;
|
900 |
} |
901 |
switch (c) {
|
902 |
case '?': |
903 |
case 'h': |
904 |
help(); |
905 |
break;
|
906 |
case 'f': |
907 |
fmt1 = optarg; |
908 |
break;
|
909 |
case 'F': |
910 |
fmt2 = optarg; |
911 |
break;
|
912 |
case 'p': |
913 |
progress = true;
|
914 |
break;
|
915 |
case 'q': |
916 |
quiet = true;
|
917 |
break;
|
918 |
case 's': |
919 |
strict = true;
|
920 |
break;
|
921 |
} |
922 |
} |
923 |
|
924 |
/* Progress is not shown in Quiet mode */
|
925 |
if (quiet) {
|
926 |
progress = false;
|
927 |
} |
928 |
|
929 |
|
930 |
if (optind > argc - 2) { |
931 |
help(); |
932 |
} |
933 |
filename1 = argv[optind++]; |
934 |
filename2 = argv[optind++]; |
935 |
|
936 |
/* Initialize before goto out */
|
937 |
qemu_progress_init(progress, 2.0); |
938 |
|
939 |
bs1 = bdrv_new_open(filename1, fmt1, BDRV_O_FLAGS, true, quiet);
|
940 |
if (!bs1) {
|
941 |
error_report("Can't open file %s", filename1);
|
942 |
ret = 2;
|
943 |
goto out3;
|
944 |
} |
945 |
|
946 |
bs2 = bdrv_new_open(filename2, fmt2, BDRV_O_FLAGS, true, quiet);
|
947 |
if (!bs2) {
|
948 |
error_report("Can't open file %s", filename2);
|
949 |
ret = 2;
|
950 |
goto out2;
|
951 |
} |
952 |
|
953 |
buf1 = qemu_blockalign(bs1, IO_BUF_SIZE); |
954 |
buf2 = qemu_blockalign(bs2, IO_BUF_SIZE); |
955 |
bdrv_get_geometry(bs1, &bs_sectors); |
956 |
total_sectors1 = bs_sectors; |
957 |
bdrv_get_geometry(bs2, &bs_sectors); |
958 |
total_sectors2 = bs_sectors; |
959 |
total_sectors = MIN(total_sectors1, total_sectors2); |
960 |
progress_base = MAX(total_sectors1, total_sectors2); |
961 |
|
962 |
qemu_progress_print(0, 100); |
963 |
|
964 |
if (strict && total_sectors1 != total_sectors2) {
|
965 |
ret = 1;
|
966 |
qprintf(quiet, "Strict mode: Image size mismatch!\n");
|
967 |
goto out;
|
968 |
} |
969 |
|
970 |
for (;;) {
|
971 |
nb_sectors = sectors_to_process(total_sectors, sector_num); |
972 |
if (nb_sectors <= 0) { |
973 |
break;
|
974 |
} |
975 |
allocated1 = bdrv_is_allocated_above(bs1, NULL, sector_num, nb_sectors,
|
976 |
&pnum1); |
977 |
if (allocated1 < 0) { |
978 |
ret = 3;
|
979 |
error_report("Sector allocation test failed for %s", filename1);
|
980 |
goto out;
|
981 |
} |
982 |
|
983 |
allocated2 = bdrv_is_allocated_above(bs2, NULL, sector_num, nb_sectors,
|
984 |
&pnum2); |
985 |
if (allocated2 < 0) { |
986 |
ret = 3;
|
987 |
error_report("Sector allocation test failed for %s", filename2);
|
988 |
goto out;
|
989 |
} |
990 |
nb_sectors = MIN(pnum1, pnum2); |
991 |
|
992 |
if (allocated1 == allocated2) {
|
993 |
if (allocated1) {
|
994 |
ret = bdrv_read(bs1, sector_num, buf1, nb_sectors); |
995 |
if (ret < 0) { |
996 |
error_report("Error while reading offset %" PRId64 " of %s:" |
997 |
" %s", sectors_to_bytes(sector_num), filename1,
|
998 |
strerror(-ret)); |
999 |
ret = 4;
|
1000 |
goto out;
|
1001 |
} |
1002 |
ret = bdrv_read(bs2, sector_num, buf2, nb_sectors); |
1003 |
if (ret < 0) { |
1004 |
error_report("Error while reading offset %" PRId64
|
1005 |
" of %s: %s", sectors_to_bytes(sector_num),
|
1006 |
filename2, strerror(-ret)); |
1007 |
ret = 4;
|
1008 |
goto out;
|
1009 |
} |
1010 |
ret = compare_sectors(buf1, buf2, nb_sectors, &pnum); |
1011 |
if (ret || pnum != nb_sectors) {
|
1012 |
ret = 1;
|
1013 |
qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", |
1014 |
sectors_to_bytes( |
1015 |
ret ? sector_num : sector_num + pnum)); |
1016 |
goto out;
|
1017 |
} |
1018 |
} |
1019 |
} else {
|
1020 |
if (strict) {
|
1021 |
ret = 1;
|
1022 |
qprintf(quiet, "Strict mode: Offset %" PRId64
|
1023 |
" allocation mismatch!\n",
|
1024 |
sectors_to_bytes(sector_num)); |
1025 |
goto out;
|
1026 |
} |
1027 |
|
1028 |
if (allocated1) {
|
1029 |
ret = check_empty_sectors(bs1, sector_num, nb_sectors, |
1030 |
filename1, buf1, quiet); |
1031 |
} else {
|
1032 |
ret = check_empty_sectors(bs2, sector_num, nb_sectors, |
1033 |
filename2, buf1, quiet); |
1034 |
} |
1035 |
if (ret) {
|
1036 |
if (ret < 0) { |
1037 |
ret = 4;
|
1038 |
error_report("Error while reading offset %" PRId64 ": %s", |
1039 |
sectors_to_bytes(sector_num), strerror(-ret)); |
1040 |
} |
1041 |
goto out;
|
1042 |
} |
1043 |
} |
1044 |
sector_num += nb_sectors; |
1045 |
qemu_progress_print(((float) nb_sectors / progress_base)*100, 100); |
1046 |
} |
1047 |
|
1048 |
if (total_sectors1 != total_sectors2) {
|
1049 |
BlockDriverState *bs_over; |
1050 |
int64_t total_sectors_over; |
1051 |
const char *filename_over; |
1052 |
|
1053 |
qprintf(quiet, "Warning: Image size mismatch!\n");
|
1054 |
if (total_sectors1 > total_sectors2) {
|
1055 |
total_sectors_over = total_sectors1; |
1056 |
bs_over = bs1; |
1057 |
filename_over = filename1; |
1058 |
} else {
|
1059 |
total_sectors_over = total_sectors2; |
1060 |
bs_over = bs2; |
1061 |
filename_over = filename2; |
1062 |
} |
1063 |
|
1064 |
for (;;) {
|
1065 |
nb_sectors = sectors_to_process(total_sectors_over, sector_num); |
1066 |
if (nb_sectors <= 0) { |
1067 |
break;
|
1068 |
} |
1069 |
ret = bdrv_is_allocated_above(bs_over, NULL, sector_num,
|
1070 |
nb_sectors, &pnum); |
1071 |
if (ret < 0) { |
1072 |
ret = 3;
|
1073 |
error_report("Sector allocation test failed for %s",
|
1074 |
filename_over); |
1075 |
goto out;
|
1076 |
|
1077 |
} |
1078 |
nb_sectors = pnum; |
1079 |
if (ret) {
|
1080 |
ret = check_empty_sectors(bs_over, sector_num, nb_sectors, |
1081 |
filename_over, buf1, quiet); |
1082 |
if (ret) {
|
1083 |
if (ret < 0) { |
1084 |
ret = 4;
|
1085 |
error_report("Error while reading offset %" PRId64
|
1086 |
" of %s: %s", sectors_to_bytes(sector_num),
|
1087 |
filename_over, strerror(-ret)); |
1088 |
} |
1089 |
goto out;
|
1090 |
} |
1091 |
} |
1092 |
sector_num += nb_sectors; |
1093 |
qemu_progress_print(((float) nb_sectors / progress_base)*100, 100); |
1094 |
} |
1095 |
} |
1096 |
|
1097 |
qprintf(quiet, "Images are identical.\n");
|
1098 |
ret = 0;
|
1099 |
|
1100 |
out:
|
1101 |
bdrv_delete(bs2); |
1102 |
qemu_vfree(buf1); |
1103 |
qemu_vfree(buf2); |
1104 |
out2:
|
1105 |
bdrv_delete(bs1); |
1106 |
out3:
|
1107 |
qemu_progress_end(); |
1108 |
return ret;
|
1109 |
} |
1110 |
|
1111 |
static int img_convert(int argc, char **argv) |
1112 |
{ |
1113 |
int c, ret = 0, n, n1, bs_n, bs_i, compress, cluster_size, cluster_sectors; |
1114 |
int progress = 0, flags; |
1115 |
const char *fmt, *out_fmt, *cache, *out_baseimg, *out_filename; |
1116 |
BlockDriver *drv, *proto_drv; |
1117 |
BlockDriverState **bs = NULL, *out_bs = NULL; |
1118 |
int64_t total_sectors, nb_sectors, sector_num, bs_offset; |
1119 |
uint64_t bs_sectors; |
1120 |
uint8_t * buf = NULL;
|
1121 |
const uint8_t *buf1;
|
1122 |
BlockDriverInfo bdi; |
1123 |
QEMUOptionParameter *param = NULL, *create_options = NULL; |
1124 |
QEMUOptionParameter *out_baseimg_param; |
1125 |
char *options = NULL; |
1126 |
const char *snapshot_name = NULL; |
1127 |
float local_progress = 0; |
1128 |
int min_sparse = 8; /* Need at least 4k of zeros for sparse detection */ |
1129 |
bool quiet = false; |
1130 |
|
1131 |
fmt = NULL;
|
1132 |
out_fmt = "raw";
|
1133 |
cache = "unsafe";
|
1134 |
out_baseimg = NULL;
|
1135 |
compress = 0;
|
1136 |
for(;;) {
|
1137 |
c = getopt(argc, argv, "f:O:B:s:hce6o:pS:t:q");
|
1138 |
if (c == -1) { |
1139 |
break;
|
1140 |
} |
1141 |
switch(c) {
|
1142 |
case '?': |
1143 |
case 'h': |
1144 |
help(); |
1145 |
break;
|
1146 |
case 'f': |
1147 |
fmt = optarg; |
1148 |
break;
|
1149 |
case 'O': |
1150 |
out_fmt = optarg; |
1151 |
break;
|
1152 |
case 'B': |
1153 |
out_baseimg = optarg; |
1154 |
break;
|
1155 |
case 'c': |
1156 |
compress = 1;
|
1157 |
break;
|
1158 |
case 'e': |
1159 |
error_report("option -e is deprecated, please use \'-o "
|
1160 |
"encryption\' instead!");
|
1161 |
return 1; |
1162 |
case '6': |
1163 |
error_report("option -6 is deprecated, please use \'-o "
|
1164 |
"compat6\' instead!");
|
1165 |
return 1; |
1166 |
case 'o': |
1167 |
options = optarg; |
1168 |
break;
|
1169 |
case 's': |
1170 |
snapshot_name = optarg; |
1171 |
break;
|
1172 |
case 'S': |
1173 |
{ |
1174 |
int64_t sval; |
1175 |
char *end;
|
1176 |
sval = strtosz_suffix(optarg, &end, STRTOSZ_DEFSUFFIX_B); |
1177 |
if (sval < 0 || *end) { |
1178 |
error_report("Invalid minimum zero buffer size for sparse output specified");
|
1179 |
return 1; |
1180 |
} |
1181 |
|
1182 |
min_sparse = sval / BDRV_SECTOR_SIZE; |
1183 |
break;
|
1184 |
} |
1185 |
case 'p': |
1186 |
progress = 1;
|
1187 |
break;
|
1188 |
case 't': |
1189 |
cache = optarg; |
1190 |
break;
|
1191 |
case 'q': |
1192 |
quiet = true;
|
1193 |
break;
|
1194 |
} |
1195 |
} |
1196 |
|
1197 |
if (quiet) {
|
1198 |
progress = 0;
|
1199 |
} |
1200 |
|
1201 |
bs_n = argc - optind - 1;
|
1202 |
if (bs_n < 1) { |
1203 |
help(); |
1204 |
} |
1205 |
|
1206 |
out_filename = argv[argc - 1];
|
1207 |
|
1208 |
/* Initialize before goto out */
|
1209 |
qemu_progress_init(progress, 2.0); |
1210 |
|
1211 |
if (options && is_help_option(options)) {
|
1212 |
ret = print_block_option_help(out_filename, out_fmt); |
1213 |
goto out;
|
1214 |
} |
1215 |
|
1216 |
if (bs_n > 1 && out_baseimg) { |
1217 |
error_report("-B makes no sense when concatenating multiple input "
|
1218 |
"images");
|
1219 |
ret = -1;
|
1220 |
goto out;
|
1221 |
} |
1222 |
|
1223 |
qemu_progress_print(0, 100); |
1224 |
|
1225 |
bs = g_malloc0(bs_n * sizeof(BlockDriverState *));
|
1226 |
|
1227 |
total_sectors = 0;
|
1228 |
for (bs_i = 0; bs_i < bs_n; bs_i++) { |
1229 |
bs[bs_i] = bdrv_new_open(argv[optind + bs_i], fmt, BDRV_O_FLAGS, true,
|
1230 |
quiet); |
1231 |
if (!bs[bs_i]) {
|
1232 |
error_report("Could not open '%s'", argv[optind + bs_i]);
|
1233 |
ret = -1;
|
1234 |
goto out;
|
1235 |
} |
1236 |
bdrv_get_geometry(bs[bs_i], &bs_sectors); |
1237 |
total_sectors += bs_sectors; |
1238 |
} |
1239 |
|
1240 |
if (snapshot_name != NULL) { |
1241 |
if (bs_n > 1) { |
1242 |
error_report("No support for concatenating multiple snapshot");
|
1243 |
ret = -1;
|
1244 |
goto out;
|
1245 |
} |
1246 |
if (bdrv_snapshot_load_tmp(bs[0], snapshot_name) < 0) { |
1247 |
error_report("Failed to load snapshot");
|
1248 |
ret = -1;
|
1249 |
goto out;
|
1250 |
} |
1251 |
} |
1252 |
|
1253 |
/* Find driver and parse its options */
|
1254 |
drv = bdrv_find_format(out_fmt); |
1255 |
if (!drv) {
|
1256 |
error_report("Unknown file format '%s'", out_fmt);
|
1257 |
ret = -1;
|
1258 |
goto out;
|
1259 |
} |
1260 |
|
1261 |
proto_drv = bdrv_find_protocol(out_filename); |
1262 |
if (!proto_drv) {
|
1263 |
error_report("Unknown protocol '%s'", out_filename);
|
1264 |
ret = -1;
|
1265 |
goto out;
|
1266 |
} |
1267 |
|
1268 |
create_options = append_option_parameters(create_options, |
1269 |
drv->create_options); |
1270 |
create_options = append_option_parameters(create_options, |
1271 |
proto_drv->create_options); |
1272 |
|
1273 |
if (options) {
|
1274 |
param = parse_option_parameters(options, create_options, param); |
1275 |
if (param == NULL) { |
1276 |
error_report("Invalid options for file format '%s'.", out_fmt);
|
1277 |
ret = -1;
|
1278 |
goto out;
|
1279 |
} |
1280 |
} else {
|
1281 |
param = parse_option_parameters("", create_options, param);
|
1282 |
} |
1283 |
|
1284 |
set_option_parameter_int(param, BLOCK_OPT_SIZE, total_sectors * 512);
|
1285 |
ret = add_old_style_options(out_fmt, param, out_baseimg, NULL);
|
1286 |
if (ret < 0) { |
1287 |
goto out;
|
1288 |
} |
1289 |
|
1290 |
/* Get backing file name if -o backing_file was used */
|
1291 |
out_baseimg_param = get_option_parameter(param, BLOCK_OPT_BACKING_FILE); |
1292 |
if (out_baseimg_param) {
|
1293 |
out_baseimg = out_baseimg_param->value.s; |
1294 |
} |
1295 |
|
1296 |
/* Check if compression is supported */
|
1297 |
if (compress) {
|
1298 |
QEMUOptionParameter *encryption = |
1299 |
get_option_parameter(param, BLOCK_OPT_ENCRYPT); |
1300 |
QEMUOptionParameter *preallocation = |
1301 |
get_option_parameter(param, BLOCK_OPT_PREALLOC); |
1302 |
|
1303 |
if (!drv->bdrv_write_compressed) {
|
1304 |
error_report("Compression not supported for this file format");
|
1305 |
ret = -1;
|
1306 |
goto out;
|
1307 |
} |
1308 |
|
1309 |
if (encryption && encryption->value.n) {
|
1310 |
error_report("Compression and encryption not supported at "
|
1311 |
"the same time");
|
1312 |
ret = -1;
|
1313 |
goto out;
|
1314 |
} |
1315 |
|
1316 |
if (preallocation && preallocation->value.s
|
1317 |
&& strcmp(preallocation->value.s, "off"))
|
1318 |
{ |
1319 |
error_report("Compression and preallocation not supported at "
|
1320 |
"the same time");
|
1321 |
ret = -1;
|
1322 |
goto out;
|
1323 |
} |
1324 |
} |
1325 |
|
1326 |
/* Create the new image */
|
1327 |
ret = bdrv_create(drv, out_filename, param); |
1328 |
if (ret < 0) { |
1329 |
if (ret == -ENOTSUP) {
|
1330 |
error_report("Formatting not supported for file format '%s'",
|
1331 |
out_fmt); |
1332 |
} else if (ret == -EFBIG) { |
1333 |
error_report("The image size is too large for file format '%s'",
|
1334 |
out_fmt); |
1335 |
} else {
|
1336 |
error_report("%s: error while converting %s: %s",
|
1337 |
out_filename, out_fmt, strerror(-ret)); |
1338 |
} |
1339 |
goto out;
|
1340 |
} |
1341 |
|
1342 |
flags = BDRV_O_RDWR; |
1343 |
ret = bdrv_parse_cache_flags(cache, &flags); |
1344 |
if (ret < 0) { |
1345 |
error_report("Invalid cache option: %s", cache);
|
1346 |
return -1; |
1347 |
} |
1348 |
|
1349 |
out_bs = bdrv_new_open(out_filename, out_fmt, flags, true, quiet);
|
1350 |
if (!out_bs) {
|
1351 |
ret = -1;
|
1352 |
goto out;
|
1353 |
} |
1354 |
|
1355 |
bs_i = 0;
|
1356 |
bs_offset = 0;
|
1357 |
bdrv_get_geometry(bs[0], &bs_sectors);
|
1358 |
buf = qemu_blockalign(out_bs, IO_BUF_SIZE); |
1359 |
|
1360 |
if (compress) {
|
1361 |
ret = bdrv_get_info(out_bs, &bdi); |
1362 |
if (ret < 0) { |
1363 |
error_report("could not get block driver info");
|
1364 |
goto out;
|
1365 |
} |
1366 |
cluster_size = bdi.cluster_size; |
1367 |
if (cluster_size <= 0 || cluster_size > IO_BUF_SIZE) { |
1368 |
error_report("invalid cluster size");
|
1369 |
ret = -1;
|
1370 |
goto out;
|
1371 |
} |
1372 |
cluster_sectors = cluster_size >> 9;
|
1373 |
sector_num = 0;
|
1374 |
|
1375 |
nb_sectors = total_sectors; |
1376 |
if (nb_sectors != 0) { |
1377 |
local_progress = (float)100 / |
1378 |
(nb_sectors / MIN(nb_sectors, cluster_sectors)); |
1379 |
} |
1380 |
|
1381 |
for(;;) {
|
1382 |
int64_t bs_num; |
1383 |
int remainder;
|
1384 |
uint8_t *buf2; |
1385 |
|
1386 |
nb_sectors = total_sectors - sector_num; |
1387 |
if (nb_sectors <= 0) |
1388 |
break;
|
1389 |
if (nb_sectors >= cluster_sectors)
|
1390 |
n = cluster_sectors; |
1391 |
else
|
1392 |
n = nb_sectors; |
1393 |
|
1394 |
bs_num = sector_num - bs_offset; |
1395 |
assert (bs_num >= 0);
|
1396 |
remainder = n; |
1397 |
buf2 = buf; |
1398 |
while (remainder > 0) { |
1399 |
int nlow;
|
1400 |
while (bs_num == bs_sectors) {
|
1401 |
bs_i++; |
1402 |
assert (bs_i < bs_n); |
1403 |
bs_offset += bs_sectors; |
1404 |
bdrv_get_geometry(bs[bs_i], &bs_sectors); |
1405 |
bs_num = 0;
|
1406 |
/* printf("changing part: sector_num=%" PRId64 ", "
|
1407 |
"bs_i=%d, bs_offset=%" PRId64 ", bs_sectors=%" PRId64
|
1408 |
"\n", sector_num, bs_i, bs_offset, bs_sectors); */
|
1409 |
} |
1410 |
assert (bs_num < bs_sectors); |
1411 |
|
1412 |
nlow = (remainder > bs_sectors - bs_num) ? bs_sectors - bs_num : remainder; |
1413 |
|
1414 |
ret = bdrv_read(bs[bs_i], bs_num, buf2, nlow); |
1415 |
if (ret < 0) { |
1416 |
error_report("error while reading sector %" PRId64 ": %s", |
1417 |
bs_num, strerror(-ret)); |
1418 |
goto out;
|
1419 |
} |
1420 |
|
1421 |
buf2 += nlow * 512;
|
1422 |
bs_num += nlow; |
1423 |
|
1424 |
remainder -= nlow; |
1425 |
} |
1426 |
assert (remainder == 0);
|
1427 |
|
1428 |
if (n < cluster_sectors) {
|
1429 |
memset(buf + n * 512, 0, cluster_size - n * 512); |
1430 |
} |
1431 |
if (!buffer_is_zero(buf, cluster_size)) {
|
1432 |
ret = bdrv_write_compressed(out_bs, sector_num, buf, |
1433 |
cluster_sectors); |
1434 |
if (ret != 0) { |
1435 |
error_report("error while compressing sector %" PRId64
|
1436 |
": %s", sector_num, strerror(-ret));
|
1437 |
goto out;
|
1438 |
} |
1439 |
} |
1440 |
sector_num += n; |
1441 |
qemu_progress_print(local_progress, 100);
|
1442 |
} |
1443 |
/* signal EOF to align */
|
1444 |
bdrv_write_compressed(out_bs, 0, NULL, 0); |
1445 |
} else {
|
1446 |
int has_zero_init = bdrv_has_zero_init(out_bs);
|
1447 |
|
1448 |
sector_num = 0; // total number of sectors converted so far |
1449 |
nb_sectors = total_sectors - sector_num; |
1450 |
if (nb_sectors != 0) { |
1451 |
local_progress = (float)100 / |
1452 |
(nb_sectors / MIN(nb_sectors, IO_BUF_SIZE / 512));
|
1453 |
} |
1454 |
|
1455 |
for(;;) {
|
1456 |
nb_sectors = total_sectors - sector_num; |
1457 |
if (nb_sectors <= 0) { |
1458 |
break;
|
1459 |
} |
1460 |
if (nb_sectors >= (IO_BUF_SIZE / 512)) { |
1461 |
n = (IO_BUF_SIZE / 512);
|
1462 |
} else {
|
1463 |
n = nb_sectors; |
1464 |
} |
1465 |
|
1466 |
while (sector_num - bs_offset >= bs_sectors) {
|
1467 |
bs_i ++; |
1468 |
assert (bs_i < bs_n); |
1469 |
bs_offset += bs_sectors; |
1470 |
bdrv_get_geometry(bs[bs_i], &bs_sectors); |
1471 |
/* printf("changing part: sector_num=%" PRId64 ", bs_i=%d, "
|
1472 |
"bs_offset=%" PRId64 ", bs_sectors=%" PRId64 "\n",
|
1473 |
sector_num, bs_i, bs_offset, bs_sectors); */
|
1474 |
} |
1475 |
|
1476 |
if (n > bs_offset + bs_sectors - sector_num) {
|
1477 |
n = bs_offset + bs_sectors - sector_num; |
1478 |
} |
1479 |
|
1480 |
if (has_zero_init) {
|
1481 |
/* If the output image is being created as a copy on write image,
|
1482 |
assume that sectors which are unallocated in the input image
|
1483 |
are present in both the output's and input's base images (no
|
1484 |
need to copy them). */
|
1485 |
if (out_baseimg) {
|
1486 |
if (!bdrv_is_allocated(bs[bs_i], sector_num - bs_offset,
|
1487 |
n, &n1)) { |
1488 |
sector_num += n1; |
1489 |
continue;
|
1490 |
} |
1491 |
/* The next 'n1' sectors are allocated in the input image. Copy
|
1492 |
only those as they may be followed by unallocated sectors. */
|
1493 |
n = n1; |
1494 |
} |
1495 |
} else {
|
1496 |
n1 = n; |
1497 |
} |
1498 |
|
1499 |
ret = bdrv_read(bs[bs_i], sector_num - bs_offset, buf, n); |
1500 |
if (ret < 0) { |
1501 |
error_report("error while reading sector %" PRId64 ": %s", |
1502 |
sector_num - bs_offset, strerror(-ret)); |
1503 |
goto out;
|
1504 |
} |
1505 |
/* NOTE: at the same time we convert, we do not write zero
|
1506 |
sectors to have a chance to compress the image. Ideally, we
|
1507 |
should add a specific call to have the info to go faster */
|
1508 |
buf1 = buf; |
1509 |
while (n > 0) { |
1510 |
/* If the output image is being created as a copy on write image,
|
1511 |
copy all sectors even the ones containing only NUL bytes,
|
1512 |
because they may differ from the sectors in the base image.
|
1513 |
|
1514 |
If the output is to a host device, we also write out
|
1515 |
sectors that are entirely 0, since whatever data was
|
1516 |
already there is garbage, not 0s. */
|
1517 |
if (!has_zero_init || out_baseimg ||
|
1518 |
is_allocated_sectors_min(buf1, n, &n1, min_sparse)) { |
1519 |
ret = bdrv_write(out_bs, sector_num, buf1, n1); |
1520 |
if (ret < 0) { |
1521 |
error_report("error while writing sector %" PRId64
|
1522 |
": %s", sector_num, strerror(-ret));
|
1523 |
goto out;
|
1524 |
} |
1525 |
} |
1526 |
sector_num += n1; |
1527 |
n -= n1; |
1528 |
buf1 += n1 * 512;
|
1529 |
} |
1530 |
qemu_progress_print(local_progress, 100);
|
1531 |
} |
1532 |
} |
1533 |
out:
|
1534 |
qemu_progress_end(); |
1535 |
free_option_parameters(create_options); |
1536 |
free_option_parameters(param); |
1537 |
qemu_vfree(buf); |
1538 |
if (out_bs) {
|
1539 |
bdrv_delete(out_bs); |
1540 |
} |
1541 |
if (bs) {
|
1542 |
for (bs_i = 0; bs_i < bs_n; bs_i++) { |
1543 |
if (bs[bs_i]) {
|
1544 |
bdrv_delete(bs[bs_i]); |
1545 |
} |
1546 |
} |
1547 |
g_free(bs); |
1548 |
} |
1549 |
if (ret) {
|
1550 |
return 1; |
1551 |
} |
1552 |
return 0; |
1553 |
} |
1554 |
|
1555 |
|
1556 |
static void dump_snapshots(BlockDriverState *bs) |
1557 |
{ |
1558 |
QEMUSnapshotInfo *sn_tab, *sn; |
1559 |
int nb_sns, i;
|
1560 |
char buf[256]; |
1561 |
|
1562 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
1563 |
if (nb_sns <= 0) |
1564 |
return;
|
1565 |
printf("Snapshot list:\n");
|
1566 |
printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
1567 |
for(i = 0; i < nb_sns; i++) { |
1568 |
sn = &sn_tab[i]; |
1569 |
printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
1570 |
} |
1571 |
g_free(sn_tab); |
1572 |
} |
1573 |
|
1574 |
static void dump_json_image_info_list(ImageInfoList *list) |
1575 |
{ |
1576 |
Error *errp = NULL;
|
1577 |
QString *str; |
1578 |
QmpOutputVisitor *ov = qmp_output_visitor_new(); |
1579 |
QObject *obj; |
1580 |
visit_type_ImageInfoList(qmp_output_get_visitor(ov), |
1581 |
&list, NULL, &errp);
|
1582 |
obj = qmp_output_get_qobject(ov); |
1583 |
str = qobject_to_json_pretty(obj); |
1584 |
assert(str != NULL);
|
1585 |
printf("%s\n", qstring_get_str(str));
|
1586 |
qobject_decref(obj); |
1587 |
qmp_output_visitor_cleanup(ov); |
1588 |
QDECREF(str); |
1589 |
} |
1590 |
|
1591 |
static void collect_snapshots(BlockDriverState *bs , ImageInfo *info) |
1592 |
{ |
1593 |
int i, sn_count;
|
1594 |
QEMUSnapshotInfo *sn_tab = NULL;
|
1595 |
SnapshotInfoList *info_list, *cur_item = NULL;
|
1596 |
sn_count = bdrv_snapshot_list(bs, &sn_tab); |
1597 |
|
1598 |
for (i = 0; i < sn_count; i++) { |
1599 |
info->has_snapshots = true;
|
1600 |
info_list = g_new0(SnapshotInfoList, 1);
|
1601 |
|
1602 |
info_list->value = g_new0(SnapshotInfo, 1);
|
1603 |
info_list->value->id = g_strdup(sn_tab[i].id_str); |
1604 |
info_list->value->name = g_strdup(sn_tab[i].name); |
1605 |
info_list->value->vm_state_size = sn_tab[i].vm_state_size; |
1606 |
info_list->value->date_sec = sn_tab[i].date_sec; |
1607 |
info_list->value->date_nsec = sn_tab[i].date_nsec; |
1608 |
info_list->value->vm_clock_sec = sn_tab[i].vm_clock_nsec / 1000000000;
|
1609 |
info_list->value->vm_clock_nsec = sn_tab[i].vm_clock_nsec % 1000000000;
|
1610 |
|
1611 |
/* XXX: waiting for the qapi to support qemu-queue.h types */
|
1612 |
if (!cur_item) {
|
1613 |
info->snapshots = cur_item = info_list; |
1614 |
} else {
|
1615 |
cur_item->next = info_list; |
1616 |
cur_item = info_list; |
1617 |
} |
1618 |
|
1619 |
} |
1620 |
|
1621 |
g_free(sn_tab); |
1622 |
} |
1623 |
|
1624 |
static void dump_json_image_info(ImageInfo *info) |
1625 |
{ |
1626 |
Error *errp = NULL;
|
1627 |
QString *str; |
1628 |
QmpOutputVisitor *ov = qmp_output_visitor_new(); |
1629 |
QObject *obj; |
1630 |
visit_type_ImageInfo(qmp_output_get_visitor(ov), |
1631 |
&info, NULL, &errp);
|
1632 |
obj = qmp_output_get_qobject(ov); |
1633 |
str = qobject_to_json_pretty(obj); |
1634 |
assert(str != NULL);
|
1635 |
printf("%s\n", qstring_get_str(str));
|
1636 |
qobject_decref(obj); |
1637 |
qmp_output_visitor_cleanup(ov); |
1638 |
QDECREF(str); |
1639 |
} |
1640 |
|
1641 |
static void collect_image_info(BlockDriverState *bs, |
1642 |
ImageInfo *info, |
1643 |
const char *filename, |
1644 |
const char *fmt) |
1645 |
{ |
1646 |
uint64_t total_sectors; |
1647 |
char backing_filename[1024]; |
1648 |
char backing_filename2[1024]; |
1649 |
BlockDriverInfo bdi; |
1650 |
|
1651 |
bdrv_get_geometry(bs, &total_sectors); |
1652 |
|
1653 |
info->filename = g_strdup(filename); |
1654 |
info->format = g_strdup(bdrv_get_format_name(bs)); |
1655 |
info->virtual_size = total_sectors * 512;
|
1656 |
info->actual_size = bdrv_get_allocated_file_size(bs); |
1657 |
info->has_actual_size = info->actual_size >= 0;
|
1658 |
if (bdrv_is_encrypted(bs)) {
|
1659 |
info->encrypted = true;
|
1660 |
info->has_encrypted = true;
|
1661 |
} |
1662 |
if (bdrv_get_info(bs, &bdi) >= 0) { |
1663 |
if (bdi.cluster_size != 0) { |
1664 |
info->cluster_size = bdi.cluster_size; |
1665 |
info->has_cluster_size = true;
|
1666 |
} |
1667 |
info->dirty_flag = bdi.is_dirty; |
1668 |
info->has_dirty_flag = true;
|
1669 |
} |
1670 |
bdrv_get_backing_filename(bs, backing_filename, sizeof(backing_filename));
|
1671 |
if (backing_filename[0] != '\0') { |
1672 |
info->backing_filename = g_strdup(backing_filename); |
1673 |
info->has_backing_filename = true;
|
1674 |
bdrv_get_full_backing_filename(bs, backing_filename2, |
1675 |
sizeof(backing_filename2));
|
1676 |
|
1677 |
if (strcmp(backing_filename, backing_filename2) != 0) { |
1678 |
info->full_backing_filename = |
1679 |
g_strdup(backing_filename2); |
1680 |
info->has_full_backing_filename = true;
|
1681 |
} |
1682 |
|
1683 |
if (bs->backing_format[0]) { |
1684 |
info->backing_filename_format = g_strdup(bs->backing_format); |
1685 |
info->has_backing_filename_format = true;
|
1686 |
} |
1687 |
} |
1688 |
} |
1689 |
|
1690 |
static void dump_human_image_info(ImageInfo *info) |
1691 |
{ |
1692 |
char size_buf[128], dsize_buf[128]; |
1693 |
if (!info->has_actual_size) {
|
1694 |
snprintf(dsize_buf, sizeof(dsize_buf), "unavailable"); |
1695 |
} else {
|
1696 |
get_human_readable_size(dsize_buf, sizeof(dsize_buf),
|
1697 |
info->actual_size); |
1698 |
} |
1699 |
get_human_readable_size(size_buf, sizeof(size_buf), info->virtual_size);
|
1700 |
printf("image: %s\n"
|
1701 |
"file format: %s\n"
|
1702 |
"virtual size: %s (%" PRId64 " bytes)\n" |
1703 |
"disk size: %s\n",
|
1704 |
info->filename, info->format, size_buf, |
1705 |
info->virtual_size, |
1706 |
dsize_buf); |
1707 |
|
1708 |
if (info->has_encrypted && info->encrypted) {
|
1709 |
printf("encrypted: yes\n");
|
1710 |
} |
1711 |
|
1712 |
if (info->has_cluster_size) {
|
1713 |
printf("cluster_size: %" PRId64 "\n", info->cluster_size); |
1714 |
} |
1715 |
|
1716 |
if (info->has_dirty_flag && info->dirty_flag) {
|
1717 |
printf("cleanly shut down: no\n");
|
1718 |
} |
1719 |
|
1720 |
if (info->has_backing_filename) {
|
1721 |
printf("backing file: %s", info->backing_filename);
|
1722 |
if (info->has_full_backing_filename) {
|
1723 |
printf(" (actual path: %s)", info->full_backing_filename);
|
1724 |
} |
1725 |
putchar('\n');
|
1726 |
if (info->has_backing_filename_format) {
|
1727 |
printf("backing file format: %s\n", info->backing_filename_format);
|
1728 |
} |
1729 |
} |
1730 |
|
1731 |
if (info->has_snapshots) {
|
1732 |
SnapshotInfoList *elem; |
1733 |
char buf[256]; |
1734 |
|
1735 |
printf("Snapshot list:\n");
|
1736 |
printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
1737 |
|
1738 |
/* Ideally bdrv_snapshot_dump() would operate on SnapshotInfoList but
|
1739 |
* we convert to the block layer's native QEMUSnapshotInfo for now.
|
1740 |
*/
|
1741 |
for (elem = info->snapshots; elem; elem = elem->next) {
|
1742 |
QEMUSnapshotInfo sn = { |
1743 |
.vm_state_size = elem->value->vm_state_size, |
1744 |
.date_sec = elem->value->date_sec, |
1745 |
.date_nsec = elem->value->date_nsec, |
1746 |
.vm_clock_nsec = elem->value->vm_clock_sec * 1000000000ULL +
|
1747 |
elem->value->vm_clock_nsec, |
1748 |
}; |
1749 |
|
1750 |
pstrcpy(sn.id_str, sizeof(sn.id_str), elem->value->id);
|
1751 |
pstrcpy(sn.name, sizeof(sn.name), elem->value->name);
|
1752 |
printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), &sn)); |
1753 |
} |
1754 |
} |
1755 |
} |
1756 |
|
1757 |
static void dump_human_image_info_list(ImageInfoList *list) |
1758 |
{ |
1759 |
ImageInfoList *elem; |
1760 |
bool delim = false; |
1761 |
|
1762 |
for (elem = list; elem; elem = elem->next) {
|
1763 |
if (delim) {
|
1764 |
printf("\n");
|
1765 |
} |
1766 |
delim = true;
|
1767 |
|
1768 |
dump_human_image_info(elem->value); |
1769 |
} |
1770 |
} |
1771 |
|
1772 |
static gboolean str_equal_func(gconstpointer a, gconstpointer b)
|
1773 |
{ |
1774 |
return strcmp(a, b) == 0; |
1775 |
} |
1776 |
|
1777 |
/**
|
1778 |
* Open an image file chain and return an ImageInfoList
|
1779 |
*
|
1780 |
* @filename: topmost image filename
|
1781 |
* @fmt: topmost image format (may be NULL to autodetect)
|
1782 |
* @chain: true - enumerate entire backing file chain
|
1783 |
* false - only topmost image file
|
1784 |
*
|
1785 |
* Returns a list of ImageInfo objects or NULL if there was an error opening an
|
1786 |
* image file. If there was an error a message will have been printed to
|
1787 |
* stderr.
|
1788 |
*/
|
1789 |
static ImageInfoList *collect_image_info_list(const char *filename, |
1790 |
const char *fmt, |
1791 |
bool chain)
|
1792 |
{ |
1793 |
ImageInfoList *head = NULL;
|
1794 |
ImageInfoList **last = &head; |
1795 |
GHashTable *filenames; |
1796 |
|
1797 |
filenames = g_hash_table_new_full(g_str_hash, str_equal_func, NULL, NULL); |
1798 |
|
1799 |
while (filename) {
|
1800 |
BlockDriverState *bs; |
1801 |
ImageInfo *info; |
1802 |
ImageInfoList *elem; |
1803 |
|
1804 |
if (g_hash_table_lookup_extended(filenames, filename, NULL, NULL)) { |
1805 |
error_report("Backing file '%s' creates an infinite loop.",
|
1806 |
filename); |
1807 |
goto err;
|
1808 |
} |
1809 |
g_hash_table_insert(filenames, (gpointer)filename, NULL);
|
1810 |
|
1811 |
bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_NO_BACKING, |
1812 |
false, false); |
1813 |
if (!bs) {
|
1814 |
goto err;
|
1815 |
} |
1816 |
|
1817 |
info = g_new0(ImageInfo, 1);
|
1818 |
collect_image_info(bs, info, filename, fmt); |
1819 |
collect_snapshots(bs, info); |
1820 |
|
1821 |
elem = g_new0(ImageInfoList, 1);
|
1822 |
elem->value = info; |
1823 |
*last = elem; |
1824 |
last = &elem->next; |
1825 |
|
1826 |
bdrv_delete(bs); |
1827 |
|
1828 |
filename = fmt = NULL;
|
1829 |
if (chain) {
|
1830 |
if (info->has_full_backing_filename) {
|
1831 |
filename = info->full_backing_filename; |
1832 |
} else if (info->has_backing_filename) { |
1833 |
filename = info->backing_filename; |
1834 |
} |
1835 |
if (info->has_backing_filename_format) {
|
1836 |
fmt = info->backing_filename_format; |
1837 |
} |
1838 |
} |
1839 |
} |
1840 |
g_hash_table_destroy(filenames); |
1841 |
return head;
|
1842 |
|
1843 |
err:
|
1844 |
qapi_free_ImageInfoList(head); |
1845 |
g_hash_table_destroy(filenames); |
1846 |
return NULL; |
1847 |
} |
1848 |
|
1849 |
static int img_info(int argc, char **argv) |
1850 |
{ |
1851 |
int c;
|
1852 |
OutputFormat output_format = OFORMAT_HUMAN; |
1853 |
bool chain = false; |
1854 |
const char *filename, *fmt, *output; |
1855 |
ImageInfoList *list; |
1856 |
|
1857 |
fmt = NULL;
|
1858 |
output = NULL;
|
1859 |
for(;;) {
|
1860 |
int option_index = 0; |
1861 |
static const struct option long_options[] = { |
1862 |
{"help", no_argument, 0, 'h'}, |
1863 |
{"format", required_argument, 0, 'f'}, |
1864 |
{"output", required_argument, 0, OPTION_OUTPUT}, |
1865 |
{"backing-chain", no_argument, 0, OPTION_BACKING_CHAIN}, |
1866 |
{0, 0, 0, 0} |
1867 |
}; |
1868 |
c = getopt_long(argc, argv, "f:h",
|
1869 |
long_options, &option_index); |
1870 |
if (c == -1) { |
1871 |
break;
|
1872 |
} |
1873 |
switch(c) {
|
1874 |
case '?': |
1875 |
case 'h': |
1876 |
help(); |
1877 |
break;
|
1878 |
case 'f': |
1879 |
fmt = optarg; |
1880 |
break;
|
1881 |
case OPTION_OUTPUT:
|
1882 |
output = optarg; |
1883 |
break;
|
1884 |
case OPTION_BACKING_CHAIN:
|
1885 |
chain = true;
|
1886 |
break;
|
1887 |
} |
1888 |
} |
1889 |
if (optind >= argc) {
|
1890 |
help(); |
1891 |
} |
1892 |
filename = argv[optind++]; |
1893 |
|
1894 |
if (output && !strcmp(output, "json")) { |
1895 |
output_format = OFORMAT_JSON; |
1896 |
} else if (output && !strcmp(output, "human")) { |
1897 |
output_format = OFORMAT_HUMAN; |
1898 |
} else if (output) { |
1899 |
error_report("--output must be used with human or json as argument.");
|
1900 |
return 1; |
1901 |
} |
1902 |
|
1903 |
list = collect_image_info_list(filename, fmt, chain); |
1904 |
if (!list) {
|
1905 |
return 1; |
1906 |
} |
1907 |
|
1908 |
switch (output_format) {
|
1909 |
case OFORMAT_HUMAN:
|
1910 |
dump_human_image_info_list(list); |
1911 |
break;
|
1912 |
case OFORMAT_JSON:
|
1913 |
if (chain) {
|
1914 |
dump_json_image_info_list(list); |
1915 |
} else {
|
1916 |
dump_json_image_info(list->value); |
1917 |
} |
1918 |
break;
|
1919 |
} |
1920 |
|
1921 |
qapi_free_ImageInfoList(list); |
1922 |
return 0; |
1923 |
} |
1924 |
|
1925 |
#define SNAPSHOT_LIST 1 |
1926 |
#define SNAPSHOT_CREATE 2 |
1927 |
#define SNAPSHOT_APPLY 3 |
1928 |
#define SNAPSHOT_DELETE 4 |
1929 |
|
1930 |
static int img_snapshot(int argc, char **argv) |
1931 |
{ |
1932 |
BlockDriverState *bs; |
1933 |
QEMUSnapshotInfo sn; |
1934 |
char *filename, *snapshot_name = NULL; |
1935 |
int c, ret = 0, bdrv_oflags; |
1936 |
int action = 0; |
1937 |
qemu_timeval tv; |
1938 |
bool quiet = false; |
1939 |
|
1940 |
bdrv_oflags = BDRV_O_FLAGS | BDRV_O_RDWR; |
1941 |
/* Parse commandline parameters */
|
1942 |
for(;;) {
|
1943 |
c = getopt(argc, argv, "la:c:d:hq");
|
1944 |
if (c == -1) { |
1945 |
break;
|
1946 |
} |
1947 |
switch(c) {
|
1948 |
case '?': |
1949 |
case 'h': |
1950 |
help(); |
1951 |
return 0; |
1952 |
case 'l': |
1953 |
if (action) {
|
1954 |
help(); |
1955 |
return 0; |
1956 |
} |
1957 |
action = SNAPSHOT_LIST; |
1958 |
bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */
|
1959 |
break;
|
1960 |
case 'a': |
1961 |
if (action) {
|
1962 |
help(); |
1963 |
return 0; |
1964 |
} |
1965 |
action = SNAPSHOT_APPLY; |
1966 |
snapshot_name = optarg; |
1967 |
break;
|
1968 |
case 'c': |
1969 |
if (action) {
|
1970 |
help(); |
1971 |
return 0; |
1972 |
} |
1973 |
action = SNAPSHOT_CREATE; |
1974 |
snapshot_name = optarg; |
1975 |
break;
|
1976 |
case 'd': |
1977 |
if (action) {
|
1978 |
help(); |
1979 |
return 0; |
1980 |
} |
1981 |
action = SNAPSHOT_DELETE; |
1982 |
snapshot_name = optarg; |
1983 |
break;
|
1984 |
case 'q': |
1985 |
quiet = true;
|
1986 |
break;
|
1987 |
} |
1988 |
} |
1989 |
|
1990 |
if (optind >= argc) {
|
1991 |
help(); |
1992 |
} |
1993 |
filename = argv[optind++]; |
1994 |
|
1995 |
/* Open the image */
|
1996 |
bs = bdrv_new_open(filename, NULL, bdrv_oflags, true, quiet); |
1997 |
if (!bs) {
|
1998 |
return 1; |
1999 |
} |
2000 |
|
2001 |
/* Perform the requested action */
|
2002 |
switch(action) {
|
2003 |
case SNAPSHOT_LIST:
|
2004 |
dump_snapshots(bs); |
2005 |
break;
|
2006 |
|
2007 |
case SNAPSHOT_CREATE:
|
2008 |
memset(&sn, 0, sizeof(sn)); |
2009 |
pstrcpy(sn.name, sizeof(sn.name), snapshot_name);
|
2010 |
|
2011 |
qemu_gettimeofday(&tv); |
2012 |
sn.date_sec = tv.tv_sec; |
2013 |
sn.date_nsec = tv.tv_usec * 1000;
|
2014 |
|
2015 |
ret = bdrv_snapshot_create(bs, &sn); |
2016 |
if (ret) {
|
2017 |
error_report("Could not create snapshot '%s': %d (%s)",
|
2018 |
snapshot_name, ret, strerror(-ret)); |
2019 |
} |
2020 |
break;
|
2021 |
|
2022 |
case SNAPSHOT_APPLY:
|
2023 |
ret = bdrv_snapshot_goto(bs, snapshot_name); |
2024 |
if (ret) {
|
2025 |
error_report("Could not apply snapshot '%s': %d (%s)",
|
2026 |
snapshot_name, ret, strerror(-ret)); |
2027 |
} |
2028 |
break;
|
2029 |
|
2030 |
case SNAPSHOT_DELETE:
|
2031 |
ret = bdrv_snapshot_delete(bs, snapshot_name); |
2032 |
if (ret) {
|
2033 |
error_report("Could not delete snapshot '%s': %d (%s)",
|
2034 |
snapshot_name, ret, strerror(-ret)); |
2035 |
} |
2036 |
break;
|
2037 |
} |
2038 |
|
2039 |
/* Cleanup */
|
2040 |
bdrv_delete(bs); |
2041 |
if (ret) {
|
2042 |
return 1; |
2043 |
} |
2044 |
return 0; |
2045 |
} |
2046 |
|
2047 |
static int img_rebase(int argc, char **argv) |
2048 |
{ |
2049 |
BlockDriverState *bs, *bs_old_backing = NULL, *bs_new_backing = NULL; |
2050 |
BlockDriver *old_backing_drv, *new_backing_drv; |
2051 |
char *filename;
|
2052 |
const char *fmt, *cache, *out_basefmt, *out_baseimg; |
2053 |
int c, flags, ret;
|
2054 |
int unsafe = 0; |
2055 |
int progress = 0; |
2056 |
bool quiet = false; |
2057 |
|
2058 |
/* Parse commandline parameters */
|
2059 |
fmt = NULL;
|
2060 |
cache = BDRV_DEFAULT_CACHE; |
2061 |
out_baseimg = NULL;
|
2062 |
out_basefmt = NULL;
|
2063 |
for(;;) {
|
2064 |
c = getopt(argc, argv, "uhf:F:b:pt:q");
|
2065 |
if (c == -1) { |
2066 |
break;
|
2067 |
} |
2068 |
switch(c) {
|
2069 |
case '?': |
2070 |
case 'h': |
2071 |
help(); |
2072 |
return 0; |
2073 |
case 'f': |
2074 |
fmt = optarg; |
2075 |
break;
|
2076 |
case 'F': |
2077 |
out_basefmt = optarg; |
2078 |
break;
|
2079 |
case 'b': |
2080 |
out_baseimg = optarg; |
2081 |
break;
|
2082 |
case 'u': |
2083 |
unsafe = 1;
|
2084 |
break;
|
2085 |
case 'p': |
2086 |
progress = 1;
|
2087 |
break;
|
2088 |
case 't': |
2089 |
cache = optarg; |
2090 |
break;
|
2091 |
case 'q': |
2092 |
quiet = true;
|
2093 |
break;
|
2094 |
} |
2095 |
} |
2096 |
|
2097 |
if (quiet) {
|
2098 |
progress = 0;
|
2099 |
} |
2100 |
|
2101 |
if ((optind >= argc) || (!unsafe && !out_baseimg)) {
|
2102 |
help(); |
2103 |
} |
2104 |
filename = argv[optind++]; |
2105 |
|
2106 |
qemu_progress_init(progress, 2.0); |
2107 |
qemu_progress_print(0, 100); |
2108 |
|
2109 |
flags = BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0);
|
2110 |
ret = bdrv_parse_cache_flags(cache, &flags); |
2111 |
if (ret < 0) { |
2112 |
error_report("Invalid cache option: %s", cache);
|
2113 |
return -1; |
2114 |
} |
2115 |
|
2116 |
/*
|
2117 |
* Open the images.
|
2118 |
*
|
2119 |
* Ignore the old backing file for unsafe rebase in case we want to correct
|
2120 |
* the reference to a renamed or moved backing file.
|
2121 |
*/
|
2122 |
bs = bdrv_new_open(filename, fmt, flags, true, quiet);
|
2123 |
if (!bs) {
|
2124 |
return 1; |
2125 |
} |
2126 |
|
2127 |
/* Find the right drivers for the backing files */
|
2128 |
old_backing_drv = NULL;
|
2129 |
new_backing_drv = NULL;
|
2130 |
|
2131 |
if (!unsafe && bs->backing_format[0] != '\0') { |
2132 |
old_backing_drv = bdrv_find_format(bs->backing_format); |
2133 |
if (old_backing_drv == NULL) { |
2134 |
error_report("Invalid format name: '%s'", bs->backing_format);
|
2135 |
ret = -1;
|
2136 |
goto out;
|
2137 |
} |
2138 |
} |
2139 |
|
2140 |
if (out_basefmt != NULL) { |
2141 |
new_backing_drv = bdrv_find_format(out_basefmt); |
2142 |
if (new_backing_drv == NULL) { |
2143 |
error_report("Invalid format name: '%s'", out_basefmt);
|
2144 |
ret = -1;
|
2145 |
goto out;
|
2146 |
} |
2147 |
} |
2148 |
|
2149 |
/* For safe rebasing we need to compare old and new backing file */
|
2150 |
if (unsafe) {
|
2151 |
/* Make the compiler happy */
|
2152 |
bs_old_backing = NULL;
|
2153 |
bs_new_backing = NULL;
|
2154 |
} else {
|
2155 |
char backing_name[1024]; |
2156 |
|
2157 |
bs_old_backing = bdrv_new("old_backing");
|
2158 |
bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name));
|
2159 |
ret = bdrv_open(bs_old_backing, backing_name, NULL, BDRV_O_FLAGS,
|
2160 |
old_backing_drv); |
2161 |
if (ret) {
|
2162 |
error_report("Could not open old backing file '%s'", backing_name);
|
2163 |
goto out;
|
2164 |
} |
2165 |
if (out_baseimg[0]) { |
2166 |
bs_new_backing = bdrv_new("new_backing");
|
2167 |
ret = bdrv_open(bs_new_backing, out_baseimg, NULL, BDRV_O_FLAGS,
|
2168 |
new_backing_drv); |
2169 |
if (ret) {
|
2170 |
error_report("Could not open new backing file '%s'",
|
2171 |
out_baseimg); |
2172 |
goto out;
|
2173 |
} |
2174 |
} |
2175 |
} |
2176 |
|
2177 |
/*
|
2178 |
* Check each unallocated cluster in the COW file. If it is unallocated,
|
2179 |
* accesses go to the backing file. We must therefore compare this cluster
|
2180 |
* in the old and new backing file, and if they differ we need to copy it
|
2181 |
* from the old backing file into the COW file.
|
2182 |
*
|
2183 |
* If qemu-img crashes during this step, no harm is done. The content of
|
2184 |
* the image is the same as the original one at any time.
|
2185 |
*/
|
2186 |
if (!unsafe) {
|
2187 |
uint64_t num_sectors; |
2188 |
uint64_t old_backing_num_sectors; |
2189 |
uint64_t new_backing_num_sectors = 0;
|
2190 |
uint64_t sector; |
2191 |
int n;
|
2192 |
uint8_t * buf_old; |
2193 |
uint8_t * buf_new; |
2194 |
float local_progress = 0; |
2195 |
|
2196 |
buf_old = qemu_blockalign(bs, IO_BUF_SIZE); |
2197 |
buf_new = qemu_blockalign(bs, IO_BUF_SIZE); |
2198 |
|
2199 |
bdrv_get_geometry(bs, &num_sectors); |
2200 |
bdrv_get_geometry(bs_old_backing, &old_backing_num_sectors); |
2201 |
if (bs_new_backing) {
|
2202 |
bdrv_get_geometry(bs_new_backing, &new_backing_num_sectors); |
2203 |
} |
2204 |
|
2205 |
if (num_sectors != 0) { |
2206 |
local_progress = (float)100 / |
2207 |
(num_sectors / MIN(num_sectors, IO_BUF_SIZE / 512));
|
2208 |
} |
2209 |
|
2210 |
for (sector = 0; sector < num_sectors; sector += n) { |
2211 |
|
2212 |
/* How many sectors can we handle with the next read? */
|
2213 |
if (sector + (IO_BUF_SIZE / 512) <= num_sectors) { |
2214 |
n = (IO_BUF_SIZE / 512);
|
2215 |
} else {
|
2216 |
n = num_sectors - sector; |
2217 |
} |
2218 |
|
2219 |
/* If the cluster is allocated, we don't need to take action */
|
2220 |
ret = bdrv_is_allocated(bs, sector, n, &n); |
2221 |
if (ret) {
|
2222 |
continue;
|
2223 |
} |
2224 |
|
2225 |
/*
|
2226 |
* Read old and new backing file and take into consideration that
|
2227 |
* backing files may be smaller than the COW image.
|
2228 |
*/
|
2229 |
if (sector >= old_backing_num_sectors) {
|
2230 |
memset(buf_old, 0, n * BDRV_SECTOR_SIZE);
|
2231 |
} else {
|
2232 |
if (sector + n > old_backing_num_sectors) {
|
2233 |
n = old_backing_num_sectors - sector; |
2234 |
} |
2235 |
|
2236 |
ret = bdrv_read(bs_old_backing, sector, buf_old, n); |
2237 |
if (ret < 0) { |
2238 |
error_report("error while reading from old backing file");
|
2239 |
goto out;
|
2240 |
} |
2241 |
} |
2242 |
|
2243 |
if (sector >= new_backing_num_sectors || !bs_new_backing) {
|
2244 |
memset(buf_new, 0, n * BDRV_SECTOR_SIZE);
|
2245 |
} else {
|
2246 |
if (sector + n > new_backing_num_sectors) {
|
2247 |
n = new_backing_num_sectors - sector; |
2248 |
} |
2249 |
|
2250 |
ret = bdrv_read(bs_new_backing, sector, buf_new, n); |
2251 |
if (ret < 0) { |
2252 |
error_report("error while reading from new backing file");
|
2253 |
goto out;
|
2254 |
} |
2255 |
} |
2256 |
|
2257 |
/* If they differ, we need to write to the COW file */
|
2258 |
uint64_t written = 0;
|
2259 |
|
2260 |
while (written < n) {
|
2261 |
int pnum;
|
2262 |
|
2263 |
if (compare_sectors(buf_old + written * 512, |
2264 |
buf_new + written * 512, n - written, &pnum))
|
2265 |
{ |
2266 |
ret = bdrv_write(bs, sector + written, |
2267 |
buf_old + written * 512, pnum);
|
2268 |
if (ret < 0) { |
2269 |
error_report("Error while writing to COW image: %s",
|
2270 |
strerror(-ret)); |
2271 |
goto out;
|
2272 |
} |
2273 |
} |
2274 |
|
2275 |
written += pnum; |
2276 |
} |
2277 |
qemu_progress_print(local_progress, 100);
|
2278 |
} |
2279 |
|
2280 |
qemu_vfree(buf_old); |
2281 |
qemu_vfree(buf_new); |
2282 |
} |
2283 |
|
2284 |
/*
|
2285 |
* Change the backing file. All clusters that are different from the old
|
2286 |
* backing file are overwritten in the COW file now, so the visible content
|
2287 |
* doesn't change when we switch the backing file.
|
2288 |
*/
|
2289 |
if (out_baseimg && *out_baseimg) {
|
2290 |
ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt); |
2291 |
} else {
|
2292 |
ret = bdrv_change_backing_file(bs, NULL, NULL); |
2293 |
} |
2294 |
|
2295 |
if (ret == -ENOSPC) {
|
2296 |
error_report("Could not change the backing file to '%s': No "
|
2297 |
"space left in the file header", out_baseimg);
|
2298 |
} else if (ret < 0) { |
2299 |
error_report("Could not change the backing file to '%s': %s",
|
2300 |
out_baseimg, strerror(-ret)); |
2301 |
} |
2302 |
|
2303 |
qemu_progress_print(100, 0); |
2304 |
/*
|
2305 |
* TODO At this point it is possible to check if any clusters that are
|
2306 |
* allocated in the COW file are the same in the backing file. If so, they
|
2307 |
* could be dropped from the COW file. Don't do this before switching the
|
2308 |
* backing file, in case of a crash this would lead to corruption.
|
2309 |
*/
|
2310 |
out:
|
2311 |
qemu_progress_end(); |
2312 |
/* Cleanup */
|
2313 |
if (!unsafe) {
|
2314 |
if (bs_old_backing != NULL) { |
2315 |
bdrv_delete(bs_old_backing); |
2316 |
} |
2317 |
if (bs_new_backing != NULL) { |
2318 |
bdrv_delete(bs_new_backing); |
2319 |
} |
2320 |
} |
2321 |
|
2322 |
bdrv_delete(bs); |
2323 |
if (ret) {
|
2324 |
return 1; |
2325 |
} |
2326 |
return 0; |
2327 |
} |
2328 |
|
2329 |
static int img_resize(int argc, char **argv) |
2330 |
{ |
2331 |
int c, ret, relative;
|
2332 |
const char *filename, *fmt, *size; |
2333 |
int64_t n, total_size; |
2334 |
bool quiet = false; |
2335 |
BlockDriverState *bs = NULL;
|
2336 |
QemuOpts *param; |
2337 |
static QemuOptsList resize_options = {
|
2338 |
.name = "resize_options",
|
2339 |
.head = QTAILQ_HEAD_INITIALIZER(resize_options.head), |
2340 |
.desc = { |
2341 |
{ |
2342 |
.name = BLOCK_OPT_SIZE, |
2343 |
.type = QEMU_OPT_SIZE, |
2344 |
.help = "Virtual disk size"
|
2345 |
}, { |
2346 |
/* end of list */
|
2347 |
} |
2348 |
}, |
2349 |
}; |
2350 |
|
2351 |
/* Remove size from argv manually so that negative numbers are not treated
|
2352 |
* as options by getopt. */
|
2353 |
if (argc < 3) { |
2354 |
help(); |
2355 |
return 1; |
2356 |
} |
2357 |
|
2358 |
size = argv[--argc]; |
2359 |
|
2360 |
/* Parse getopt arguments */
|
2361 |
fmt = NULL;
|
2362 |
for(;;) {
|
2363 |
c = getopt(argc, argv, "f:hq");
|
2364 |
if (c == -1) { |
2365 |
break;
|
2366 |
} |
2367 |
switch(c) {
|
2368 |
case '?': |
2369 |
case 'h': |
2370 |
help(); |
2371 |
break;
|
2372 |
case 'f': |
2373 |
fmt = optarg; |
2374 |
break;
|
2375 |
case 'q': |
2376 |
quiet = true;
|
2377 |
break;
|
2378 |
} |
2379 |
} |
2380 |
if (optind >= argc) {
|
2381 |
help(); |
2382 |
} |
2383 |
filename = argv[optind++]; |
2384 |
|
2385 |
/* Choose grow, shrink, or absolute resize mode */
|
2386 |
switch (size[0]) { |
2387 |
case '+': |
2388 |
relative = 1;
|
2389 |
size++; |
2390 |
break;
|
2391 |
case '-': |
2392 |
relative = -1;
|
2393 |
size++; |
2394 |
break;
|
2395 |
default:
|
2396 |
relative = 0;
|
2397 |
break;
|
2398 |
} |
2399 |
|
2400 |
/* Parse size */
|
2401 |
param = qemu_opts_create_nofail(&resize_options); |
2402 |
if (qemu_opt_set(param, BLOCK_OPT_SIZE, size)) {
|
2403 |
/* Error message already printed when size parsing fails */
|
2404 |
ret = -1;
|
2405 |
qemu_opts_del(param); |
2406 |
goto out;
|
2407 |
} |
2408 |
n = qemu_opt_get_size(param, BLOCK_OPT_SIZE, 0);
|
2409 |
qemu_opts_del(param); |
2410 |
|
2411 |
bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR, true, quiet);
|
2412 |
if (!bs) {
|
2413 |
ret = -1;
|
2414 |
goto out;
|
2415 |
} |
2416 |
|
2417 |
if (relative) {
|
2418 |
total_size = bdrv_getlength(bs) + n * relative; |
2419 |
} else {
|
2420 |
total_size = n; |
2421 |
} |
2422 |
if (total_size <= 0) { |
2423 |
error_report("New image size must be positive");
|
2424 |
ret = -1;
|
2425 |
goto out;
|
2426 |
} |
2427 |
|
2428 |
ret = bdrv_truncate(bs, total_size); |
2429 |
switch (ret) {
|
2430 |
case 0: |
2431 |
qprintf(quiet, "Image resized.\n");
|
2432 |
break;
|
2433 |
case -ENOTSUP:
|
2434 |
error_report("This image does not support resize");
|
2435 |
break;
|
2436 |
case -EACCES:
|
2437 |
error_report("Image is read-only");
|
2438 |
break;
|
2439 |
default:
|
2440 |
error_report("Error resizing image (%d)", -ret);
|
2441 |
break;
|
2442 |
} |
2443 |
out:
|
2444 |
if (bs) {
|
2445 |
bdrv_delete(bs); |
2446 |
} |
2447 |
if (ret) {
|
2448 |
return 1; |
2449 |
} |
2450 |
return 0; |
2451 |
} |
2452 |
|
2453 |
static const img_cmd_t img_cmds[] = { |
2454 |
#define DEF(option, callback, arg_string) \
|
2455 |
{ option, callback }, |
2456 |
#include "qemu-img-cmds.h" |
2457 |
#undef DEF
|
2458 |
#undef GEN_DOCS
|
2459 |
{ NULL, NULL, }, |
2460 |
}; |
2461 |
|
2462 |
int main(int argc, char **argv) |
2463 |
{ |
2464 |
const img_cmd_t *cmd;
|
2465 |
const char *cmdname; |
2466 |
|
2467 |
error_set_progname(argv[0]);
|
2468 |
|
2469 |
qemu_init_main_loop(); |
2470 |
bdrv_init(); |
2471 |
if (argc < 2) |
2472 |
help(); |
2473 |
cmdname = argv[1];
|
2474 |
argc--; argv++; |
2475 |
|
2476 |
/* find the command */
|
2477 |
for(cmd = img_cmds; cmd->name != NULL; cmd++) { |
2478 |
if (!strcmp(cmdname, cmd->name)) {
|
2479 |
return cmd->handler(argc, argv);
|
2480 |
} |
2481 |
} |
2482 |
|
2483 |
/* not found */
|
2484 |
help(); |
2485 |
return 0; |
2486 |
} |