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| 1 |
/*
|
|---|---|
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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
|
| 8 |
* 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
|
| 11 |
* 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 "qjson.h" |
| 27 |
#include "qemu-common.h" |
| 28 |
#include "qemu-option.h" |
| 29 |
#include "qemu-error.h" |
| 30 |
#include "osdep.h" |
| 31 |
#include "sysemu.h" |
| 32 |
#include "block_int.h" |
| 33 |
#include <getopt.h> |
| 34 |
#include <stdio.h> |
| 35 |
|
| 36 |
#ifdef _WIN32
|
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#include <windows.h> |
| 38 |
#endif
|
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|
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typedef struct img_cmd_t { |
| 41 |
const char *name; |
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int (*handler)(int argc, char **argv); |
| 43 |
} img_cmd_t; |
| 44 |
|
| 45 |
/* Default to cache=writeback as data integrity is not important for qemu-tcg. */
|
| 46 |
#define BDRV_O_FLAGS BDRV_O_CACHE_WB
|
| 47 |
#define BDRV_DEFAULT_CACHE "writeback" |
| 48 |
|
| 49 |
static void format_print(void *opaque, const char *name) |
| 50 |
{
|
| 51 |
printf(" %s", name);
|
| 52 |
} |
| 53 |
|
| 54 |
/* Please keep in synch with qemu-img.texi */
|
| 55 |
static void help(void) |
| 56 |
{
|
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const char *help_msg = |
| 58 |
"qemu-img version " QEMU_VERSION ", Copyright (c) 2004-2008 Fabrice Bellard\n" |
| 59 |
"usage: qemu-img command [command options]\n"
|
| 60 |
"QEMU disk image utility\n"
|
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"\n"
|
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"Command syntax:\n"
|
| 63 |
#define DEF(option, callback, arg_string) \
|
| 64 |
" " arg_string "\n" |
| 65 |
#include "qemu-img-cmds.h" |
| 66 |
#undef DEF
|
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#undef GEN_DOCS
|
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"\n"
|
| 69 |
"Command parameters:\n"
|
| 70 |
" 'filename' is a disk image filename\n"
|
| 71 |
" 'fmt' is the disk image format. It is guessed automatically in most cases\n"
|
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" 'cache' is the cache mode used to write the output disk image, the valid\n"
|
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" options are: 'none', 'writeback' (default, except for convert), 'writethrough',\n"
|
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" 'directsync' and 'unsafe' (default for convert)\n"
|
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" 'size' is the disk image size in bytes. Optional suffixes\n"
|
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" 'k' or 'K' (kilobyte, 1024), 'M' (megabyte, 1024k), 'G' (gigabyte, 1024M)\n"
|
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" and T (terabyte, 1024G) are supported. 'b' is ignored.\n"
|
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" 'output_filename' is the destination disk image filename\n"
|
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" 'output_fmt' is the destination format\n"
|
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" 'options' is a comma separated list of format specific options in a\n"
|
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" name=value format. Use -o ? for an overview of the options supported by the\n"
|
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" used format\n"
|
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" '-c' indicates that target image must be compressed (qcow format only)\n"
|
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" '-u' enables unsafe rebasing. It is assumed that old and new backing file\n"
|
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" match exactly. The image doesn't need a working backing file before\n"
|
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" rebasing in this case (useful for renaming the backing file)\n"
|
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" '-h' with or without a command shows this help and lists the supported formats\n"
|
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" '-p' show progress of command (only certain commands)\n"
|
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" '-S' indicates the consecutive number of bytes that must contain only zeros\n"
|
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" for qemu-img to create a sparse image during conversion\n"
|
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" '--output' takes the format in which the output must be done (human or json)\n"
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"\n"
|
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"Parameters to check subcommand:\n"
|
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" '-r' tries to repair any inconsistencies that are found during the check.\n"
|
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" '-r leaks' repairs only cluster leaks, whereas '-r all' fixes all\n"
|
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" kinds of errors, with a higher risk of choosing the wrong fix or\n"
|
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" hiding corruption that has already occurred.\n"
|
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"\n"
|
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"Parameters to snapshot subcommand:\n"
|
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" 'snapshot' is the name of the snapshot to create, apply or delete\n"
|
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" '-a' applies a snapshot (revert disk to saved state)\n"
|
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" '-c' creates a snapshot\n"
|
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" '-d' deletes a snapshot\n"
|
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" '-l' lists all snapshots in the given image\n";
|
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|
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printf("%s\nSupported formats:", help_msg);
|
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bdrv_iterate_format(format_print, NULL);
|
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printf("\n");
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exit(1);
|
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} |
| 111 |
|
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#if defined(WIN32)
|
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/* XXX: put correct support for win32 */
|
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static int read_password(char *buf, int buf_size) |
| 115 |
{
|
| 116 |
int c, i;
|
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printf("Password: ");
|
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fflush(stdout); |
| 119 |
i = 0;
|
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for(;;) {
|
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c = getchar(); |
| 122 |
if (c == '\n') |
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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> |
| 134 |
|
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static struct termios oldtty; |
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|
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static void term_exit(void) |
| 138 |
{
|
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tcsetattr (0, TCSANOW, &oldtty);
|
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} |
| 141 |
|
| 142 |
static void term_init(void) |
| 143 |
{
|
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struct termios tty;
|
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|
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tcgetattr (0, &tty);
|
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oldtty = tty; |
| 148 |
|
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tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP |
| 150 |
|INLCR|IGNCR|ICRNL|IXON); |
| 151 |
tty.c_oflag |= OPOST; |
| 152 |
tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN); |
| 153 |
tty.c_cflag &= ~(CSIZE|PARENB); |
| 154 |
tty.c_cflag |= CS8; |
| 155 |
tty.c_cc[VMIN] = 1;
|
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tty.c_cc[VTIME] = 0;
|
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|
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tcsetattr (0, TCSANOW, &tty);
|
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|
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atexit(term_exit); |
| 161 |
} |
| 162 |
|
| 163 |
static int read_password(char *buf, int buf_size) |
| 164 |
{
|
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uint8_t ch; |
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int i, ret;
|
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|
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printf("password: ");
|
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fflush(stdout); |
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term_init(); |
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i = 0;
|
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for(;;) {
|
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ret = read(0, &ch, 1); |
| 174 |
if (ret == -1) { |
| 175 |
if (errno == EAGAIN || errno == EINTR) {
|
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continue;
|
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} else {
|
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ret = -1;
|
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break;
|
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} |
| 181 |
} else if (ret == 0) { |
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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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} |
| 189 |
if (i < (buf_size - 1)) |
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buf[i++] = ch; |
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} |
| 192 |
} |
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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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|
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static int print_block_option_help(const char *filename, const char *fmt) |
| 201 |
{
|
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BlockDriver *drv, *proto_drv; |
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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); |
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if (!drv) {
|
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error_report("Unknown file format '%s'", fmt);
|
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return 1; |
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} |
| 211 |
|
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proto_drv = bdrv_find_protocol(filename); |
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if (!proto_drv) {
|
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error_report("Unknown protocol '%s'", filename);
|
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return 1; |
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} |
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|
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create_options = append_option_parameters(create_options, |
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drv->create_options); |
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create_options = append_option_parameters(create_options, |
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proto_drv->create_options); |
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print_option_help(create_options); |
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free_option_parameters(create_options); |
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return 0; |
| 225 |
} |
| 226 |
|
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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]; |
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int ret;
|
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|
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bs = bdrv_new("image");
|
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|
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if (fmt) {
|
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drv = bdrv_find_format(fmt); |
| 241 |
if (!drv) {
|
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error_report("Unknown file format '%s'", fmt);
|
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goto fail;
|
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} |
| 245 |
} else {
|
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drv = NULL;
|
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} |
| 248 |
|
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ret = bdrv_open(bs, filename, flags, drv); |
| 250 |
if (ret < 0) { |
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error_report("Could not open '%s': %s", filename, strerror(-ret));
|
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goto fail;
|
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} |
| 254 |
|
| 255 |
if (bdrv_is_encrypted(bs) && require_io) {
|
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printf("Disk image '%s' is encrypted.\n", filename);
|
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if (read_password(password, sizeof(password)) < 0) { |
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error_report("No password given");
|
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goto fail;
|
| 260 |
} |
| 261 |
if (bdrv_set_key(bs, password) < 0) { |
| 262 |
error_report("invalid password");
|
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goto fail;
|
| 264 |
} |
| 265 |
} |
| 266 |
return bs;
|
| 267 |
fail:
|
| 268 |
if (bs) {
|
| 269 |
bdrv_delete(bs); |
| 270 |
} |
| 271 |
return NULL; |
| 272 |
} |
| 273 |
|
| 274 |
static int add_old_style_options(const char *fmt, QEMUOptionParameter *list, |
| 275 |
const char *base_filename, |
| 276 |
const char *base_fmt) |
| 277 |
{
|
| 278 |
if (base_filename) {
|
| 279 |
if (set_option_parameter(list, BLOCK_OPT_BACKING_FILE, base_filename)) {
|
| 280 |
error_report("Backing file not supported for file format '%s'",
|
| 281 |
fmt); |
| 282 |
return -1; |
| 283 |
} |
| 284 |
} |
| 285 |
if (base_fmt) {
|
| 286 |
if (set_option_parameter(list, BLOCK_OPT_BACKING_FMT, base_fmt)) {
|
| 287 |
error_report("Backing file format not supported for file "
|
| 288 |
"format '%s'", fmt);
|
| 289 |
return -1; |
| 290 |
} |
| 291 |
} |
| 292 |
return 0; |
| 293 |
} |
| 294 |
|
| 295 |
static int img_create(int argc, char **argv) |
| 296 |
{
|
| 297 |
int c, ret = 0; |
| 298 |
uint64_t img_size = -1;
|
| 299 |
const char *fmt = "raw"; |
| 300 |
const char *base_fmt = NULL; |
| 301 |
const char *filename; |
| 302 |
const char *base_filename = NULL; |
| 303 |
char *options = NULL; |
| 304 |
|
| 305 |
for(;;) {
|
| 306 |
c = getopt(argc, argv, "F:b:f:he6o:");
|
| 307 |
if (c == -1) { |
| 308 |
break;
|
| 309 |
} |
| 310 |
switch(c) {
|
| 311 |
case '?': |
| 312 |
case 'h': |
| 313 |
help(); |
| 314 |
break;
|
| 315 |
case 'F': |
| 316 |
base_fmt = optarg; |
| 317 |
break;
|
| 318 |
case 'b': |
| 319 |
base_filename = optarg; |
| 320 |
break;
|
| 321 |
case 'f': |
| 322 |
fmt = optarg; |
| 323 |
break;
|
| 324 |
case 'e': |
| 325 |
error_report("option -e is deprecated, please use \'-o "
|
| 326 |
"encryption\' instead!");
|
| 327 |
return 1; |
| 328 |
case '6': |
| 329 |
error_report("option -6 is deprecated, please use \'-o "
|
| 330 |
"compat6\' instead!");
|
| 331 |
return 1; |
| 332 |
case 'o': |
| 333 |
options = optarg; |
| 334 |
break;
|
| 335 |
} |
| 336 |
} |
| 337 |
|
| 338 |
/* Get the filename */
|
| 339 |
if (optind >= argc) {
|
| 340 |
help(); |
| 341 |
} |
| 342 |
filename = argv[optind++]; |
| 343 |
|
| 344 |
/* Get image size, if specified */
|
| 345 |
if (optind < argc) {
|
| 346 |
int64_t sval; |
| 347 |
char *end;
|
| 348 |
sval = strtosz_suffix(argv[optind++], &end, STRTOSZ_DEFSUFFIX_B); |
| 349 |
if (sval < 0 || *end) { |
| 350 |
error_report("Invalid image size specified! You may use k, M, G or "
|
| 351 |
"T suffixes for ");
|
| 352 |
error_report("kilobytes, megabytes, gigabytes and terabytes.");
|
| 353 |
ret = -1;
|
| 354 |
goto out;
|
| 355 |
} |
| 356 |
img_size = (uint64_t)sval; |
| 357 |
} |
| 358 |
|
| 359 |
if (options && is_help_option(options)) {
|
| 360 |
ret = print_block_option_help(filename, fmt); |
| 361 |
goto out;
|
| 362 |
} |
| 363 |
|
| 364 |
ret = bdrv_img_create(filename, fmt, base_filename, base_fmt, |
| 365 |
options, img_size, BDRV_O_FLAGS); |
| 366 |
out:
|
| 367 |
if (ret) {
|
| 368 |
return 1; |
| 369 |
} |
| 370 |
return 0; |
| 371 |
} |
| 372 |
|
| 373 |
/*
|
| 374 |
* Checks an image for consistency. Exit codes:
|
| 375 |
*
|
| 376 |
* 0 - Check completed, image is good
|
| 377 |
* 1 - Check not completed because of internal errors
|
| 378 |
* 2 - Check completed, image is corrupted
|
| 379 |
* 3 - Check completed, image has leaked clusters, but is good otherwise
|
| 380 |
*/
|
| 381 |
static int img_check(int argc, char **argv) |
| 382 |
{
|
| 383 |
int c, ret;
|
| 384 |
const char *filename, *fmt; |
| 385 |
BlockDriverState *bs; |
| 386 |
BdrvCheckResult result; |
| 387 |
int fix = 0; |
| 388 |
int flags = BDRV_O_FLAGS | BDRV_O_CHECK;
|
| 389 |
|
| 390 |
fmt = NULL;
|
| 391 |
for(;;) {
|
| 392 |
c = getopt(argc, argv, "f:hr:");
|
| 393 |
if (c == -1) { |
| 394 |
break;
|
| 395 |
} |
| 396 |
switch(c) {
|
| 397 |
case '?': |
| 398 |
case 'h': |
| 399 |
help(); |
| 400 |
break;
|
| 401 |
case 'f': |
| 402 |
fmt = optarg; |
| 403 |
break;
|
| 404 |
case 'r': |
| 405 |
flags |= BDRV_O_RDWR; |
| 406 |
|
| 407 |
if (!strcmp(optarg, "leaks")) { |
| 408 |
fix = BDRV_FIX_LEAKS; |
| 409 |
} else if (!strcmp(optarg, "all")) { |
| 410 |
fix = BDRV_FIX_LEAKS | BDRV_FIX_ERRORS; |
| 411 |
} else {
|
| 412 |
help(); |
| 413 |
} |
| 414 |
break;
|
| 415 |
} |
| 416 |
} |
| 417 |
if (optind >= argc) {
|
| 418 |
help(); |
| 419 |
} |
| 420 |
filename = argv[optind++]; |
| 421 |
|
| 422 |
bs = bdrv_new_open(filename, fmt, flags, true);
|
| 423 |
if (!bs) {
|
| 424 |
return 1; |
| 425 |
} |
| 426 |
ret = bdrv_check(bs, &result, fix); |
| 427 |
|
| 428 |
if (ret == -ENOTSUP) {
|
| 429 |
error_report("This image format does not support checks");
|
| 430 |
bdrv_delete(bs); |
| 431 |
return 1; |
| 432 |
} |
| 433 |
|
| 434 |
if (result.corruptions_fixed || result.leaks_fixed) {
|
| 435 |
printf("The following inconsistencies were found and repaired:\n\n"
|
| 436 |
" %d leaked clusters\n"
|
| 437 |
" %d corruptions\n\n"
|
| 438 |
"Double checking the fixed image now...\n",
|
| 439 |
result.leaks_fixed, |
| 440 |
result.corruptions_fixed); |
| 441 |
ret = bdrv_check(bs, &result, 0);
|
| 442 |
} |
| 443 |
|
| 444 |
if (!(result.corruptions || result.leaks || result.check_errors)) {
|
| 445 |
printf("No errors were found on the image.\n");
|
| 446 |
} else {
|
| 447 |
if (result.corruptions) {
|
| 448 |
printf("\n%d errors were found on the image.\n"
|
| 449 |
"Data may be corrupted, or further writes to the image "
|
| 450 |
"may corrupt it.\n",
|
| 451 |
result.corruptions); |
| 452 |
} |
| 453 |
|
| 454 |
if (result.leaks) {
|
| 455 |
printf("\n%d leaked clusters were found on the image.\n"
|
| 456 |
"This means waste of disk space, but no harm to data.\n",
|
| 457 |
result.leaks); |
| 458 |
} |
| 459 |
|
| 460 |
if (result.check_errors) {
|
| 461 |
printf("\n%d internal errors have occurred during the check.\n",
|
| 462 |
result.check_errors); |
| 463 |
} |
| 464 |
} |
| 465 |
|
| 466 |
if (result.bfi.total_clusters != 0 && result.bfi.allocated_clusters != 0) { |
| 467 |
printf("%" PRId64 "/%" PRId64 "= %0.2f%% allocated, %0.2f%% fragmented\n", |
| 468 |
result.bfi.allocated_clusters, result.bfi.total_clusters, |
| 469 |
result.bfi.allocated_clusters * 100.0 / result.bfi.total_clusters, |
| 470 |
result.bfi.fragmented_clusters * 100.0 / result.bfi.allocated_clusters); |
| 471 |
} |
| 472 |
|
| 473 |
bdrv_delete(bs); |
| 474 |
|
| 475 |
if (ret < 0 || result.check_errors) { |
| 476 |
printf("\nAn error has occurred during the check: %s\n"
|
| 477 |
"The check is not complete and may have missed error.\n",
|
| 478 |
strerror(-ret)); |
| 479 |
return 1; |
| 480 |
} |
| 481 |
|
| 482 |
if (result.corruptions) {
|
| 483 |
return 2; |
| 484 |
} else if (result.leaks) { |
| 485 |
return 3; |
| 486 |
} else {
|
| 487 |
return 0; |
| 488 |
} |
| 489 |
} |
| 490 |
|
| 491 |
static int img_commit(int argc, char **argv) |
| 492 |
{
|
| 493 |
int c, ret, flags;
|
| 494 |
const char *filename, *fmt, *cache; |
| 495 |
BlockDriverState *bs; |
| 496 |
|
| 497 |
fmt = NULL;
|
| 498 |
cache = BDRV_DEFAULT_CACHE; |
| 499 |
for(;;) {
|
| 500 |
c = getopt(argc, argv, "f:ht:");
|
| 501 |
if (c == -1) { |
| 502 |
break;
|
| 503 |
} |
| 504 |
switch(c) {
|
| 505 |
case '?': |
| 506 |
case 'h': |
| 507 |
help(); |
| 508 |
break;
|
| 509 |
case 'f': |
| 510 |
fmt = optarg; |
| 511 |
break;
|
| 512 |
case 't': |
| 513 |
cache = optarg; |
| 514 |
break;
|
| 515 |
} |
| 516 |
} |
| 517 |
if (optind >= argc) {
|
| 518 |
help(); |
| 519 |
} |
| 520 |
filename = argv[optind++]; |
| 521 |
|
| 522 |
flags = BDRV_O_RDWR; |
| 523 |
ret = bdrv_parse_cache_flags(cache, &flags); |
| 524 |
if (ret < 0) { |
| 525 |
error_report("Invalid cache option: %s", cache);
|
| 526 |
return -1; |
| 527 |
} |
| 528 |
|
| 529 |
bs = bdrv_new_open(filename, fmt, flags, true);
|
| 530 |
if (!bs) {
|
| 531 |
return 1; |
| 532 |
} |
| 533 |
ret = bdrv_commit(bs); |
| 534 |
switch(ret) {
|
| 535 |
case 0: |
| 536 |
printf("Image committed.\n");
|
| 537 |
break;
|
| 538 |
case -ENOENT:
|
| 539 |
error_report("No disk inserted");
|
| 540 |
break;
|
| 541 |
case -EACCES:
|
| 542 |
error_report("Image is read-only");
|
| 543 |
break;
|
| 544 |
case -ENOTSUP:
|
| 545 |
error_report("Image is already committed");
|
| 546 |
break;
|
| 547 |
default:
|
| 548 |
error_report("Error while committing image");
|
| 549 |
break;
|
| 550 |
} |
| 551 |
|
| 552 |
bdrv_delete(bs); |
| 553 |
if (ret) {
|
| 554 |
return 1; |
| 555 |
} |
| 556 |
return 0; |
| 557 |
} |
| 558 |
|
| 559 |
/*
|
| 560 |
* Returns true iff the first sector pointed to by 'buf' contains at least
|
| 561 |
* a non-NUL byte.
|
| 562 |
*
|
| 563 |
* 'pnum' is set to the number of sectors (including and immediately following
|
| 564 |
* the first one) that are known to be in the same allocated/unallocated state.
|
| 565 |
*/
|
| 566 |
static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) |
| 567 |
{
|
| 568 |
bool is_zero;
|
| 569 |
int i;
|
| 570 |
|
| 571 |
if (n <= 0) { |
| 572 |
*pnum = 0;
|
| 573 |
return 0; |
| 574 |
} |
| 575 |
is_zero = buffer_is_zero(buf, 512);
|
| 576 |
for(i = 1; i < n; i++) { |
| 577 |
buf += 512;
|
| 578 |
if (is_zero != buffer_is_zero(buf, 512)) { |
| 579 |
break;
|
| 580 |
} |
| 581 |
} |
| 582 |
*pnum = i; |
| 583 |
return !is_zero;
|
| 584 |
} |
| 585 |
|
| 586 |
/*
|
| 587 |
* Like is_allocated_sectors, but if the buffer starts with a used sector,
|
| 588 |
* up to 'min' consecutive sectors containing zeros are ignored. This avoids
|
| 589 |
* breaking up write requests for only small sparse areas.
|
| 590 |
*/
|
| 591 |
static int is_allocated_sectors_min(const uint8_t *buf, int n, int *pnum, |
| 592 |
int min)
|
| 593 |
{
|
| 594 |
int ret;
|
| 595 |
int num_checked, num_used;
|
| 596 |
|
| 597 |
if (n < min) {
|
| 598 |
min = n; |
| 599 |
} |
| 600 |
|
| 601 |
ret = is_allocated_sectors(buf, n, pnum); |
| 602 |
if (!ret) {
|
| 603 |
return ret;
|
| 604 |
} |
| 605 |
|
| 606 |
num_used = *pnum; |
| 607 |
buf += BDRV_SECTOR_SIZE * *pnum; |
| 608 |
n -= *pnum; |
| 609 |
num_checked = num_used; |
| 610 |
|
| 611 |
while (n > 0) { |
| 612 |
ret = is_allocated_sectors(buf, n, pnum); |
| 613 |
|
| 614 |
buf += BDRV_SECTOR_SIZE * *pnum; |
| 615 |
n -= *pnum; |
| 616 |
num_checked += *pnum; |
| 617 |
if (ret) {
|
| 618 |
num_used = num_checked; |
| 619 |
} else if (*pnum >= min) { |
| 620 |
break;
|
| 621 |
} |
| 622 |
} |
| 623 |
|
| 624 |
*pnum = num_used; |
| 625 |
return 1; |
| 626 |
} |
| 627 |
|
| 628 |
/*
|
| 629 |
* Compares two buffers sector by sector. Returns 0 if the first sector of both
|
| 630 |
* buffers matches, non-zero otherwise.
|
| 631 |
*
|
| 632 |
* pnum is set to the number of sectors (including and immediately following
|
| 633 |
* the first one) that are known to have the same comparison result
|
| 634 |
*/
|
| 635 |
static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n, |
| 636 |
int *pnum)
|
| 637 |
{
|
| 638 |
int res, i;
|
| 639 |
|
| 640 |
if (n <= 0) { |
| 641 |
*pnum = 0;
|
| 642 |
return 0; |
| 643 |
} |
| 644 |
|
| 645 |
res = !!memcmp(buf1, buf2, 512);
|
| 646 |
for(i = 1; i < n; i++) { |
| 647 |
buf1 += 512;
|
| 648 |
buf2 += 512;
|
| 649 |
|
| 650 |
if (!!memcmp(buf1, buf2, 512) != res) { |
| 651 |
break;
|
| 652 |
} |
| 653 |
} |
| 654 |
|
| 655 |
*pnum = i; |
| 656 |
return res;
|
| 657 |
} |
| 658 |
|
| 659 |
#define IO_BUF_SIZE (2 * 1024 * 1024) |
| 660 |
|
| 661 |
static int img_convert(int argc, char **argv) |
| 662 |
{
|
| 663 |
int c, ret = 0, n, n1, bs_n, bs_i, compress, cluster_size, cluster_sectors; |
| 664 |
int progress = 0, flags; |
| 665 |
const char *fmt, *out_fmt, *cache, *out_baseimg, *out_filename; |
| 666 |
BlockDriver *drv, *proto_drv; |
| 667 |
BlockDriverState **bs = NULL, *out_bs = NULL; |
| 668 |
int64_t total_sectors, nb_sectors, sector_num, bs_offset; |
| 669 |
uint64_t bs_sectors; |
| 670 |
uint8_t * buf = NULL;
|
| 671 |
const uint8_t *buf1;
|
| 672 |
BlockDriverInfo bdi; |
| 673 |
QEMUOptionParameter *param = NULL, *create_options = NULL; |
| 674 |
QEMUOptionParameter *out_baseimg_param; |
| 675 |
char *options = NULL; |
| 676 |
const char *snapshot_name = NULL; |
| 677 |
float local_progress = 0; |
| 678 |
int min_sparse = 8; /* Need at least 4k of zeros for sparse detection */ |
| 679 |
|
| 680 |
fmt = NULL;
|
| 681 |
out_fmt = "raw";
|
| 682 |
cache = "unsafe";
|
| 683 |
out_baseimg = NULL;
|
| 684 |
compress = 0;
|
| 685 |
for(;;) {
|
| 686 |
c = getopt(argc, argv, "f:O:B:s:hce6o:pS:t:");
|
| 687 |
if (c == -1) { |
| 688 |
break;
|
| 689 |
} |
| 690 |
switch(c) {
|
| 691 |
case '?': |
| 692 |
case 'h': |
| 693 |
help(); |
| 694 |
break;
|
| 695 |
case 'f': |
| 696 |
fmt = optarg; |
| 697 |
break;
|
| 698 |
case 'O': |
| 699 |
out_fmt = optarg; |
| 700 |
break;
|
| 701 |
case 'B': |
| 702 |
out_baseimg = optarg; |
| 703 |
break;
|
| 704 |
case 'c': |
| 705 |
compress = 1;
|
| 706 |
break;
|
| 707 |
case 'e': |
| 708 |
error_report("option -e is deprecated, please use \'-o "
|
| 709 |
"encryption\' instead!");
|
| 710 |
return 1; |
| 711 |
case '6': |
| 712 |
error_report("option -6 is deprecated, please use \'-o "
|
| 713 |
"compat6\' instead!");
|
| 714 |
return 1; |
| 715 |
case 'o': |
| 716 |
options = optarg; |
| 717 |
break;
|
| 718 |
case 's': |
| 719 |
snapshot_name = optarg; |
| 720 |
break;
|
| 721 |
case 'S': |
| 722 |
{
|
| 723 |
int64_t sval; |
| 724 |
char *end;
|
| 725 |
sval = strtosz_suffix(optarg, &end, STRTOSZ_DEFSUFFIX_B); |
| 726 |
if (sval < 0 || *end) { |
| 727 |
error_report("Invalid minimum zero buffer size for sparse output specified");
|
| 728 |
return 1; |
| 729 |
} |
| 730 |
|
| 731 |
min_sparse = sval / BDRV_SECTOR_SIZE; |
| 732 |
break;
|
| 733 |
} |
| 734 |
case 'p': |
| 735 |
progress = 1;
|
| 736 |
break;
|
| 737 |
case 't': |
| 738 |
cache = optarg; |
| 739 |
break;
|
| 740 |
} |
| 741 |
} |
| 742 |
|
| 743 |
bs_n = argc - optind - 1;
|
| 744 |
if (bs_n < 1) { |
| 745 |
help(); |
| 746 |
} |
| 747 |
|
| 748 |
out_filename = argv[argc - 1];
|
| 749 |
|
| 750 |
/* Initialize before goto out */
|
| 751 |
qemu_progress_init(progress, 2.0); |
| 752 |
|
| 753 |
if (options && is_help_option(options)) {
|
| 754 |
ret = print_block_option_help(out_filename, out_fmt); |
| 755 |
goto out;
|
| 756 |
} |
| 757 |
|
| 758 |
if (bs_n > 1 && out_baseimg) { |
| 759 |
error_report("-B makes no sense when concatenating multiple input "
|
| 760 |
"images");
|
| 761 |
ret = -1;
|
| 762 |
goto out;
|
| 763 |
} |
| 764 |
|
| 765 |
qemu_progress_print(0, 100); |
| 766 |
|
| 767 |
bs = g_malloc0(bs_n * sizeof(BlockDriverState *));
|
| 768 |
|
| 769 |
total_sectors = 0;
|
| 770 |
for (bs_i = 0; bs_i < bs_n; bs_i++) { |
| 771 |
bs[bs_i] = bdrv_new_open(argv[optind + bs_i], fmt, BDRV_O_FLAGS, true);
|
| 772 |
if (!bs[bs_i]) {
|
| 773 |
error_report("Could not open '%s'", argv[optind + bs_i]);
|
| 774 |
ret = -1;
|
| 775 |
goto out;
|
| 776 |
} |
| 777 |
bdrv_get_geometry(bs[bs_i], &bs_sectors); |
| 778 |
total_sectors += bs_sectors; |
| 779 |
} |
| 780 |
|
| 781 |
if (snapshot_name != NULL) { |
| 782 |
if (bs_n > 1) { |
| 783 |
error_report("No support for concatenating multiple snapshot");
|
| 784 |
ret = -1;
|
| 785 |
goto out;
|
| 786 |
} |
| 787 |
if (bdrv_snapshot_load_tmp(bs[0], snapshot_name) < 0) { |
| 788 |
error_report("Failed to load snapshot");
|
| 789 |
ret = -1;
|
| 790 |
goto out;
|
| 791 |
} |
| 792 |
} |
| 793 |
|
| 794 |
/* Find driver and parse its options */
|
| 795 |
drv = bdrv_find_format(out_fmt); |
| 796 |
if (!drv) {
|
| 797 |
error_report("Unknown file format '%s'", out_fmt);
|
| 798 |
ret = -1;
|
| 799 |
goto out;
|
| 800 |
} |
| 801 |
|
| 802 |
proto_drv = bdrv_find_protocol(out_filename); |
| 803 |
if (!proto_drv) {
|
| 804 |
error_report("Unknown protocol '%s'", out_filename);
|
| 805 |
ret = -1;
|
| 806 |
goto out;
|
| 807 |
} |
| 808 |
|
| 809 |
create_options = append_option_parameters(create_options, |
| 810 |
drv->create_options); |
| 811 |
create_options = append_option_parameters(create_options, |
| 812 |
proto_drv->create_options); |
| 813 |
|
| 814 |
if (options) {
|
| 815 |
param = parse_option_parameters(options, create_options, param); |
| 816 |
if (param == NULL) { |
| 817 |
error_report("Invalid options for file format '%s'.", out_fmt);
|
| 818 |
ret = -1;
|
| 819 |
goto out;
|
| 820 |
} |
| 821 |
} else {
|
| 822 |
param = parse_option_parameters("", create_options, param);
|
| 823 |
} |
| 824 |
|
| 825 |
set_option_parameter_int(param, BLOCK_OPT_SIZE, total_sectors * 512);
|
| 826 |
ret = add_old_style_options(out_fmt, param, out_baseimg, NULL);
|
| 827 |
if (ret < 0) { |
| 828 |
goto out;
|
| 829 |
} |
| 830 |
|
| 831 |
/* Get backing file name if -o backing_file was used */
|
| 832 |
out_baseimg_param = get_option_parameter(param, BLOCK_OPT_BACKING_FILE); |
| 833 |
if (out_baseimg_param) {
|
| 834 |
out_baseimg = out_baseimg_param->value.s; |
| 835 |
} |
| 836 |
|
| 837 |
/* Check if compression is supported */
|
| 838 |
if (compress) {
|
| 839 |
QEMUOptionParameter *encryption = |
| 840 |
get_option_parameter(param, BLOCK_OPT_ENCRYPT); |
| 841 |
QEMUOptionParameter *preallocation = |
| 842 |
get_option_parameter(param, BLOCK_OPT_PREALLOC); |
| 843 |
|
| 844 |
if (!drv->bdrv_write_compressed) {
|
| 845 |
error_report("Compression not supported for this file format");
|
| 846 |
ret = -1;
|
| 847 |
goto out;
|
| 848 |
} |
| 849 |
|
| 850 |
if (encryption && encryption->value.n) {
|
| 851 |
error_report("Compression and encryption not supported at "
|
| 852 |
"the same time");
|
| 853 |
ret = -1;
|
| 854 |
goto out;
|
| 855 |
} |
| 856 |
|
| 857 |
if (preallocation && preallocation->value.s
|
| 858 |
&& strcmp(preallocation->value.s, "off"))
|
| 859 |
{
|
| 860 |
error_report("Compression and preallocation not supported at "
|
| 861 |
"the same time");
|
| 862 |
ret = -1;
|
| 863 |
goto out;
|
| 864 |
} |
| 865 |
} |
| 866 |
|
| 867 |
/* Create the new image */
|
| 868 |
ret = bdrv_create(drv, out_filename, param); |
| 869 |
if (ret < 0) { |
| 870 |
if (ret == -ENOTSUP) {
|
| 871 |
error_report("Formatting not supported for file format '%s'",
|
| 872 |
out_fmt); |
| 873 |
} else if (ret == -EFBIG) { |
| 874 |
error_report("The image size is too large for file format '%s'",
|
| 875 |
out_fmt); |
| 876 |
} else {
|
| 877 |
error_report("%s: error while converting %s: %s",
|
| 878 |
out_filename, out_fmt, strerror(-ret)); |
| 879 |
} |
| 880 |
goto out;
|
| 881 |
} |
| 882 |
|
| 883 |
flags = BDRV_O_RDWR; |
| 884 |
ret = bdrv_parse_cache_flags(cache, &flags); |
| 885 |
if (ret < 0) { |
| 886 |
error_report("Invalid cache option: %s", cache);
|
| 887 |
return -1; |
| 888 |
} |
| 889 |
|
| 890 |
out_bs = bdrv_new_open(out_filename, out_fmt, flags, true);
|
| 891 |
if (!out_bs) {
|
| 892 |
ret = -1;
|
| 893 |
goto out;
|
| 894 |
} |
| 895 |
|
| 896 |
bs_i = 0;
|
| 897 |
bs_offset = 0;
|
| 898 |
bdrv_get_geometry(bs[0], &bs_sectors);
|
| 899 |
buf = qemu_blockalign(out_bs, IO_BUF_SIZE); |
| 900 |
|
| 901 |
if (compress) {
|
| 902 |
ret = bdrv_get_info(out_bs, &bdi); |
| 903 |
if (ret < 0) { |
| 904 |
error_report("could not get block driver info");
|
| 905 |
goto out;
|
| 906 |
} |
| 907 |
cluster_size = bdi.cluster_size; |
| 908 |
if (cluster_size <= 0 || cluster_size > IO_BUF_SIZE) { |
| 909 |
error_report("invalid cluster size");
|
| 910 |
ret = -1;
|
| 911 |
goto out;
|
| 912 |
} |
| 913 |
cluster_sectors = cluster_size >> 9;
|
| 914 |
sector_num = 0;
|
| 915 |
|
| 916 |
nb_sectors = total_sectors; |
| 917 |
if (nb_sectors != 0) { |
| 918 |
local_progress = (float)100 / |
| 919 |
(nb_sectors / MIN(nb_sectors, cluster_sectors)); |
| 920 |
} |
| 921 |
|
| 922 |
for(;;) {
|
| 923 |
int64_t bs_num; |
| 924 |
int remainder;
|
| 925 |
uint8_t *buf2; |
| 926 |
|
| 927 |
nb_sectors = total_sectors - sector_num; |
| 928 |
if (nb_sectors <= 0) |
| 929 |
break;
|
| 930 |
if (nb_sectors >= cluster_sectors)
|
| 931 |
n = cluster_sectors; |
| 932 |
else
|
| 933 |
n = nb_sectors; |
| 934 |
|
| 935 |
bs_num = sector_num - bs_offset; |
| 936 |
assert (bs_num >= 0);
|
| 937 |
remainder = n; |
| 938 |
buf2 = buf; |
| 939 |
while (remainder > 0) { |
| 940 |
int nlow;
|
| 941 |
while (bs_num == bs_sectors) {
|
| 942 |
bs_i++; |
| 943 |
assert (bs_i < bs_n); |
| 944 |
bs_offset += bs_sectors; |
| 945 |
bdrv_get_geometry(bs[bs_i], &bs_sectors); |
| 946 |
bs_num = 0;
|
| 947 |
/* printf("changing part: sector_num=%" PRId64 ", "
|
| 948 |
"bs_i=%d, bs_offset=%" PRId64 ", bs_sectors=%" PRId64
|
| 949 |
"\n", sector_num, bs_i, bs_offset, bs_sectors); */
|
| 950 |
} |
| 951 |
assert (bs_num < bs_sectors); |
| 952 |
|
| 953 |
nlow = (remainder > bs_sectors - bs_num) ? bs_sectors - bs_num : remainder; |
| 954 |
|
| 955 |
ret = bdrv_read(bs[bs_i], bs_num, buf2, nlow); |
| 956 |
if (ret < 0) { |
| 957 |
error_report("error while reading sector %" PRId64 ": %s", |
| 958 |
bs_num, strerror(-ret)); |
| 959 |
goto out;
|
| 960 |
} |
| 961 |
|
| 962 |
buf2 += nlow * 512;
|
| 963 |
bs_num += nlow; |
| 964 |
|
| 965 |
remainder -= nlow; |
| 966 |
} |
| 967 |
assert (remainder == 0);
|
| 968 |
|
| 969 |
if (n < cluster_sectors) {
|
| 970 |
memset(buf + n * 512, 0, cluster_size - n * 512); |
| 971 |
} |
| 972 |
if (!buffer_is_zero(buf, cluster_size)) {
|
| 973 |
ret = bdrv_write_compressed(out_bs, sector_num, buf, |
| 974 |
cluster_sectors); |
| 975 |
if (ret != 0) { |
| 976 |
error_report("error while compressing sector %" PRId64
|
| 977 |
": %s", sector_num, strerror(-ret));
|
| 978 |
goto out;
|
| 979 |
} |
| 980 |
} |
| 981 |
sector_num += n; |
| 982 |
qemu_progress_print(local_progress, 100);
|
| 983 |
} |
| 984 |
/* signal EOF to align */
|
| 985 |
bdrv_write_compressed(out_bs, 0, NULL, 0); |
| 986 |
} else {
|
| 987 |
int has_zero_init = bdrv_has_zero_init(out_bs);
|
| 988 |
|
| 989 |
sector_num = 0; // total number of sectors converted so far |
| 990 |
nb_sectors = total_sectors - sector_num; |
| 991 |
if (nb_sectors != 0) { |
| 992 |
local_progress = (float)100 / |
| 993 |
(nb_sectors / MIN(nb_sectors, IO_BUF_SIZE / 512));
|
| 994 |
} |
| 995 |
|
| 996 |
for(;;) {
|
| 997 |
nb_sectors = total_sectors - sector_num; |
| 998 |
if (nb_sectors <= 0) { |
| 999 |
break;
|
| 1000 |
} |
| 1001 |
if (nb_sectors >= (IO_BUF_SIZE / 512)) { |
| 1002 |
n = (IO_BUF_SIZE / 512);
|
| 1003 |
} else {
|
| 1004 |
n = nb_sectors; |
| 1005 |
} |
| 1006 |
|
| 1007 |
while (sector_num - bs_offset >= bs_sectors) {
|
| 1008 |
bs_i ++; |
| 1009 |
assert (bs_i < bs_n); |
| 1010 |
bs_offset += bs_sectors; |
| 1011 |
bdrv_get_geometry(bs[bs_i], &bs_sectors); |
| 1012 |
/* printf("changing part: sector_num=%" PRId64 ", bs_i=%d, "
|
| 1013 |
"bs_offset=%" PRId64 ", bs_sectors=%" PRId64 "\n",
|
| 1014 |
sector_num, bs_i, bs_offset, bs_sectors); */
|
| 1015 |
} |
| 1016 |
|
| 1017 |
if (n > bs_offset + bs_sectors - sector_num) {
|
| 1018 |
n = bs_offset + bs_sectors - sector_num; |
| 1019 |
} |
| 1020 |
|
| 1021 |
if (has_zero_init) {
|
| 1022 |
/* If the output image is being created as a copy on write image,
|
| 1023 |
assume that sectors which are unallocated in the input image
|
| 1024 |
are present in both the output's and input's base images (no
|
| 1025 |
need to copy them). */
|
| 1026 |
if (out_baseimg) {
|
| 1027 |
if (!bdrv_is_allocated(bs[bs_i], sector_num - bs_offset,
|
| 1028 |
n, &n1)) {
|
| 1029 |
sector_num += n1; |
| 1030 |
continue;
|
| 1031 |
} |
| 1032 |
/* The next 'n1' sectors are allocated in the input image. Copy
|
| 1033 |
only those as they may be followed by unallocated sectors. */
|
| 1034 |
n = n1; |
| 1035 |
} |
| 1036 |
} else {
|
| 1037 |
n1 = n; |
| 1038 |
} |
| 1039 |
|
| 1040 |
ret = bdrv_read(bs[bs_i], sector_num - bs_offset, buf, n); |
| 1041 |
if (ret < 0) { |
| 1042 |
error_report("error while reading sector %" PRId64 ": %s", |
| 1043 |
sector_num - bs_offset, strerror(-ret)); |
| 1044 |
goto out;
|
| 1045 |
} |
| 1046 |
/* NOTE: at the same time we convert, we do not write zero
|
| 1047 |
sectors to have a chance to compress the image. Ideally, we
|
| 1048 |
should add a specific call to have the info to go faster */
|
| 1049 |
buf1 = buf; |
| 1050 |
while (n > 0) { |
| 1051 |
/* If the output image is being created as a copy on write image,
|
| 1052 |
copy all sectors even the ones containing only NUL bytes,
|
| 1053 |
because they may differ from the sectors in the base image.
|
| 1054 |
|
| 1055 |
If the output is to a host device, we also write out
|
| 1056 |
sectors that are entirely 0, since whatever data was
|
| 1057 |
already there is garbage, not 0s. */
|
| 1058 |
if (!has_zero_init || out_baseimg ||
|
| 1059 |
is_allocated_sectors_min(buf1, n, &n1, min_sparse)) {
|
| 1060 |
ret = bdrv_write(out_bs, sector_num, buf1, n1); |
| 1061 |
if (ret < 0) { |
| 1062 |
error_report("error while writing sector %" PRId64
|
| 1063 |
": %s", sector_num, strerror(-ret));
|
| 1064 |
goto out;
|
| 1065 |
} |
| 1066 |
} |
| 1067 |
sector_num += n1; |
| 1068 |
n -= n1; |
| 1069 |
buf1 += n1 * 512;
|
| 1070 |
} |
| 1071 |
qemu_progress_print(local_progress, 100);
|
| 1072 |
} |
| 1073 |
} |
| 1074 |
out:
|
| 1075 |
qemu_progress_end(); |
| 1076 |
free_option_parameters(create_options); |
| 1077 |
free_option_parameters(param); |
| 1078 |
qemu_vfree(buf); |
| 1079 |
if (out_bs) {
|
| 1080 |
bdrv_delete(out_bs); |
| 1081 |
} |
| 1082 |
if (bs) {
|
| 1083 |
for (bs_i = 0; bs_i < bs_n; bs_i++) { |
| 1084 |
if (bs[bs_i]) {
|
| 1085 |
bdrv_delete(bs[bs_i]); |
| 1086 |
} |
| 1087 |
} |
| 1088 |
g_free(bs); |
| 1089 |
} |
| 1090 |
if (ret) {
|
| 1091 |
return 1; |
| 1092 |
} |
| 1093 |
return 0; |
| 1094 |
} |
| 1095 |
|
| 1096 |
|
| 1097 |
static void dump_snapshots(BlockDriverState *bs) |
| 1098 |
{
|
| 1099 |
QEMUSnapshotInfo *sn_tab, *sn; |
| 1100 |
int nb_sns, i;
|
| 1101 |
char buf[256]; |
| 1102 |
|
| 1103 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
| 1104 |
if (nb_sns <= 0) |
| 1105 |
return;
|
| 1106 |
printf("Snapshot list:\n");
|
| 1107 |
printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
| 1108 |
for(i = 0; i < nb_sns; i++) { |
| 1109 |
sn = &sn_tab[i]; |
| 1110 |
printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
| 1111 |
} |
| 1112 |
g_free(sn_tab); |
| 1113 |
} |
| 1114 |
|
| 1115 |
static void dump_json_image_info_list(ImageInfoList *list) |
| 1116 |
{
|
| 1117 |
Error *errp = NULL;
|
| 1118 |
QString *str; |
| 1119 |
QmpOutputVisitor *ov = qmp_output_visitor_new(); |
| 1120 |
QObject *obj; |
| 1121 |
visit_type_ImageInfoList(qmp_output_get_visitor(ov), |
| 1122 |
&list, NULL, &errp);
|
| 1123 |
obj = qmp_output_get_qobject(ov); |
| 1124 |
str = qobject_to_json_pretty(obj); |
| 1125 |
assert(str != NULL);
|
| 1126 |
printf("%s\n", qstring_get_str(str));
|
| 1127 |
qobject_decref(obj); |
| 1128 |
qmp_output_visitor_cleanup(ov); |
| 1129 |
QDECREF(str); |
| 1130 |
} |
| 1131 |
|
| 1132 |
static void collect_snapshots(BlockDriverState *bs , ImageInfo *info) |
| 1133 |
{
|
| 1134 |
int i, sn_count;
|
| 1135 |
QEMUSnapshotInfo *sn_tab = NULL;
|
| 1136 |
SnapshotInfoList *info_list, *cur_item = NULL;
|
| 1137 |
sn_count = bdrv_snapshot_list(bs, &sn_tab); |
| 1138 |
|
| 1139 |
for (i = 0; i < sn_count; i++) { |
| 1140 |
info->has_snapshots = true;
|
| 1141 |
info_list = g_new0(SnapshotInfoList, 1);
|
| 1142 |
|
| 1143 |
info_list->value = g_new0(SnapshotInfo, 1);
|
| 1144 |
info_list->value->id = g_strdup(sn_tab[i].id_str); |
| 1145 |
info_list->value->name = g_strdup(sn_tab[i].name); |
| 1146 |
info_list->value->vm_state_size = sn_tab[i].vm_state_size; |
| 1147 |
info_list->value->date_sec = sn_tab[i].date_sec; |
| 1148 |
info_list->value->date_nsec = sn_tab[i].date_nsec; |
| 1149 |
info_list->value->vm_clock_sec = sn_tab[i].vm_clock_nsec / 1000000000;
|
| 1150 |
info_list->value->vm_clock_nsec = sn_tab[i].vm_clock_nsec % 1000000000;
|
| 1151 |
|
| 1152 |
/* XXX: waiting for the qapi to support qemu-queue.h types */
|
| 1153 |
if (!cur_item) {
|
| 1154 |
info->snapshots = cur_item = info_list; |
| 1155 |
} else {
|
| 1156 |
cur_item->next = info_list; |
| 1157 |
cur_item = info_list; |
| 1158 |
} |
| 1159 |
|
| 1160 |
} |
| 1161 |
|
| 1162 |
g_free(sn_tab); |
| 1163 |
} |
| 1164 |
|
| 1165 |
static void dump_json_image_info(ImageInfo *info) |
| 1166 |
{
|
| 1167 |
Error *errp = NULL;
|
| 1168 |
QString *str; |
| 1169 |
QmpOutputVisitor *ov = qmp_output_visitor_new(); |
| 1170 |
QObject *obj; |
| 1171 |
visit_type_ImageInfo(qmp_output_get_visitor(ov), |
| 1172 |
&info, NULL, &errp);
|
| 1173 |
obj = qmp_output_get_qobject(ov); |
| 1174 |
str = qobject_to_json_pretty(obj); |
| 1175 |
assert(str != NULL);
|
| 1176 |
printf("%s\n", qstring_get_str(str));
|
| 1177 |
qobject_decref(obj); |
| 1178 |
qmp_output_visitor_cleanup(ov); |
| 1179 |
QDECREF(str); |
| 1180 |
} |
| 1181 |
|
| 1182 |
static void collect_image_info(BlockDriverState *bs, |
| 1183 |
ImageInfo *info, |
| 1184 |
const char *filename, |
| 1185 |
const char *fmt) |
| 1186 |
{
|
| 1187 |
uint64_t total_sectors; |
| 1188 |
char backing_filename[1024]; |
| 1189 |
char backing_filename2[1024]; |
| 1190 |
BlockDriverInfo bdi; |
| 1191 |
|
| 1192 |
bdrv_get_geometry(bs, &total_sectors); |
| 1193 |
|
| 1194 |
info->filename = g_strdup(filename); |
| 1195 |
info->format = g_strdup(bdrv_get_format_name(bs)); |
| 1196 |
info->virtual_size = total_sectors * 512;
|
| 1197 |
info->actual_size = bdrv_get_allocated_file_size(bs); |
| 1198 |
info->has_actual_size = info->actual_size >= 0;
|
| 1199 |
if (bdrv_is_encrypted(bs)) {
|
| 1200 |
info->encrypted = true;
|
| 1201 |
info->has_encrypted = true;
|
| 1202 |
} |
| 1203 |
if (bdrv_get_info(bs, &bdi) >= 0) { |
| 1204 |
if (bdi.cluster_size != 0) { |
| 1205 |
info->cluster_size = bdi.cluster_size; |
| 1206 |
info->has_cluster_size = true;
|
| 1207 |
} |
| 1208 |
info->dirty_flag = bdi.is_dirty; |
| 1209 |
info->has_dirty_flag = true;
|
| 1210 |
} |
| 1211 |
bdrv_get_backing_filename(bs, backing_filename, sizeof(backing_filename));
|
| 1212 |
if (backing_filename[0] != '\0') { |
| 1213 |
info->backing_filename = g_strdup(backing_filename); |
| 1214 |
info->has_backing_filename = true;
|
| 1215 |
bdrv_get_full_backing_filename(bs, backing_filename2, |
| 1216 |
sizeof(backing_filename2));
|
| 1217 |
|
| 1218 |
if (strcmp(backing_filename, backing_filename2) != 0) { |
| 1219 |
info->full_backing_filename = |
| 1220 |
g_strdup(backing_filename2); |
| 1221 |
info->has_full_backing_filename = true;
|
| 1222 |
} |
| 1223 |
|
| 1224 |
if (bs->backing_format[0]) { |
| 1225 |
info->backing_filename_format = g_strdup(bs->backing_format); |
| 1226 |
info->has_backing_filename_format = true;
|
| 1227 |
} |
| 1228 |
} |
| 1229 |
} |
| 1230 |
|
| 1231 |
static void dump_human_image_info(ImageInfo *info) |
| 1232 |
{
|
| 1233 |
char size_buf[128], dsize_buf[128]; |
| 1234 |
if (!info->has_actual_size) {
|
| 1235 |
snprintf(dsize_buf, sizeof(dsize_buf), "unavailable"); |
| 1236 |
} else {
|
| 1237 |
get_human_readable_size(dsize_buf, sizeof(dsize_buf),
|
| 1238 |
info->actual_size); |
| 1239 |
} |
| 1240 |
get_human_readable_size(size_buf, sizeof(size_buf), info->virtual_size);
|
| 1241 |
printf("image: %s\n"
|
| 1242 |
"file format: %s\n"
|
| 1243 |
"virtual size: %s (%" PRId64 " bytes)\n" |
| 1244 |
"disk size: %s\n",
|
| 1245 |
info->filename, info->format, size_buf, |
| 1246 |
info->virtual_size, |
| 1247 |
dsize_buf); |
| 1248 |
|
| 1249 |
if (info->has_encrypted && info->encrypted) {
|
| 1250 |
printf("encrypted: yes\n");
|
| 1251 |
} |
| 1252 |
|
| 1253 |
if (info->has_cluster_size) {
|
| 1254 |
printf("cluster_size: %" PRId64 "\n", info->cluster_size); |
| 1255 |
} |
| 1256 |
|
| 1257 |
if (info->has_dirty_flag && info->dirty_flag) {
|
| 1258 |
printf("cleanly shut down: no\n");
|
| 1259 |
} |
| 1260 |
|
| 1261 |
if (info->has_backing_filename) {
|
| 1262 |
printf("backing file: %s", info->backing_filename);
|
| 1263 |
if (info->has_full_backing_filename) {
|
| 1264 |
printf(" (actual path: %s)", info->full_backing_filename);
|
| 1265 |
} |
| 1266 |
putchar('\n');
|
| 1267 |
if (info->has_backing_filename_format) {
|
| 1268 |
printf("backing file format: %s\n", info->backing_filename_format);
|
| 1269 |
} |
| 1270 |
} |
| 1271 |
|
| 1272 |
if (info->has_snapshots) {
|
| 1273 |
SnapshotInfoList *elem; |
| 1274 |
char buf[256]; |
| 1275 |
|
| 1276 |
printf("Snapshot list:\n");
|
| 1277 |
printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
| 1278 |
|
| 1279 |
/* Ideally bdrv_snapshot_dump() would operate on SnapshotInfoList but
|
| 1280 |
* we convert to the block layer's native QEMUSnapshotInfo for now.
|
| 1281 |
*/
|
| 1282 |
for (elem = info->snapshots; elem; elem = elem->next) {
|
| 1283 |
QEMUSnapshotInfo sn = {
|
| 1284 |
.vm_state_size = elem->value->vm_state_size, |
| 1285 |
.date_sec = elem->value->date_sec, |
| 1286 |
.date_nsec = elem->value->date_nsec, |
| 1287 |
.vm_clock_nsec = elem->value->vm_clock_sec * 1000000000ULL +
|
| 1288 |
elem->value->vm_clock_nsec, |
| 1289 |
}; |
| 1290 |
|
| 1291 |
pstrcpy(sn.id_str, sizeof(sn.id_str), elem->value->id);
|
| 1292 |
pstrcpy(sn.name, sizeof(sn.name), elem->value->name);
|
| 1293 |
printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), &sn)); |
| 1294 |
} |
| 1295 |
} |
| 1296 |
} |
| 1297 |
|
| 1298 |
static void dump_human_image_info_list(ImageInfoList *list) |
| 1299 |
{
|
| 1300 |
ImageInfoList *elem; |
| 1301 |
bool delim = false; |
| 1302 |
|
| 1303 |
for (elem = list; elem; elem = elem->next) {
|
| 1304 |
if (delim) {
|
| 1305 |
printf("\n");
|
| 1306 |
} |
| 1307 |
delim = true;
|
| 1308 |
|
| 1309 |
dump_human_image_info(elem->value); |
| 1310 |
} |
| 1311 |
} |
| 1312 |
|
| 1313 |
static gboolean str_equal_func(gconstpointer a, gconstpointer b)
|
| 1314 |
{
|
| 1315 |
return strcmp(a, b) == 0; |
| 1316 |
} |
| 1317 |
|
| 1318 |
/**
|
| 1319 |
* Open an image file chain and return an ImageInfoList
|
| 1320 |
*
|
| 1321 |
* @filename: topmost image filename
|
| 1322 |
* @fmt: topmost image format (may be NULL to autodetect)
|
| 1323 |
* @chain: true - enumerate entire backing file chain
|
| 1324 |
* false - only topmost image file
|
| 1325 |
*
|
| 1326 |
* Returns a list of ImageInfo objects or NULL if there was an error opening an
|
| 1327 |
* image file. If there was an error a message will have been printed to
|
| 1328 |
* stderr.
|
| 1329 |
*/
|
| 1330 |
static ImageInfoList *collect_image_info_list(const char *filename, |
| 1331 |
const char *fmt, |
| 1332 |
bool chain)
|
| 1333 |
{
|
| 1334 |
ImageInfoList *head = NULL;
|
| 1335 |
ImageInfoList **last = &head; |
| 1336 |
GHashTable *filenames; |
| 1337 |
|
| 1338 |
filenames = g_hash_table_new_full(g_str_hash, str_equal_func, NULL, NULL); |
| 1339 |
|
| 1340 |
while (filename) {
|
| 1341 |
BlockDriverState *bs; |
| 1342 |
ImageInfo *info; |
| 1343 |
ImageInfoList *elem; |
| 1344 |
|
| 1345 |
if (g_hash_table_lookup_extended(filenames, filename, NULL, NULL)) { |
| 1346 |
error_report("Backing file '%s' creates an infinite loop.",
|
| 1347 |
filename); |
| 1348 |
goto err;
|
| 1349 |
} |
| 1350 |
g_hash_table_insert(filenames, (gpointer)filename, NULL);
|
| 1351 |
|
| 1352 |
bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_NO_BACKING, |
| 1353 |
false);
|
| 1354 |
if (!bs) {
|
| 1355 |
goto err;
|
| 1356 |
} |
| 1357 |
|
| 1358 |
info = g_new0(ImageInfo, 1);
|
| 1359 |
collect_image_info(bs, info, filename, fmt); |
| 1360 |
collect_snapshots(bs, info); |
| 1361 |
|
| 1362 |
elem = g_new0(ImageInfoList, 1);
|
| 1363 |
elem->value = info; |
| 1364 |
*last = elem; |
| 1365 |
last = &elem->next; |
| 1366 |
|
| 1367 |
bdrv_delete(bs); |
| 1368 |
|
| 1369 |
filename = fmt = NULL;
|
| 1370 |
if (chain) {
|
| 1371 |
if (info->has_full_backing_filename) {
|
| 1372 |
filename = info->full_backing_filename; |
| 1373 |
} else if (info->has_backing_filename) { |
| 1374 |
filename = info->backing_filename; |
| 1375 |
} |
| 1376 |
if (info->has_backing_filename_format) {
|
| 1377 |
fmt = info->backing_filename_format; |
| 1378 |
} |
| 1379 |
} |
| 1380 |
} |
| 1381 |
g_hash_table_destroy(filenames); |
| 1382 |
return head;
|
| 1383 |
|
| 1384 |
err:
|
| 1385 |
qapi_free_ImageInfoList(head); |
| 1386 |
g_hash_table_destroy(filenames); |
| 1387 |
return NULL; |
| 1388 |
} |
| 1389 |
|
| 1390 |
enum {
|
| 1391 |
OPTION_OUTPUT = 256,
|
| 1392 |
OPTION_BACKING_CHAIN = 257,
|
| 1393 |
}; |
| 1394 |
|
| 1395 |
typedef enum OutputFormat { |
| 1396 |
OFORMAT_JSON, |
| 1397 |
OFORMAT_HUMAN, |
| 1398 |
} OutputFormat; |
| 1399 |
|
| 1400 |
static int img_info(int argc, char **argv) |
| 1401 |
{
|
| 1402 |
int c;
|
| 1403 |
OutputFormat output_format = OFORMAT_HUMAN; |
| 1404 |
bool chain = false; |
| 1405 |
const char *filename, *fmt, *output; |
| 1406 |
ImageInfoList *list; |
| 1407 |
|
| 1408 |
fmt = NULL;
|
| 1409 |
output = NULL;
|
| 1410 |
for(;;) {
|
| 1411 |
int option_index = 0; |
| 1412 |
static const struct option long_options[] = { |
| 1413 |
{"help", no_argument, 0, 'h'},
|
| 1414 |
{"format", required_argument, 0, 'f'},
|
| 1415 |
{"output", required_argument, 0, OPTION_OUTPUT},
|
| 1416 |
{"backing-chain", no_argument, 0, OPTION_BACKING_CHAIN},
|
| 1417 |
{0, 0, 0, 0}
|
| 1418 |
}; |
| 1419 |
c = getopt_long(argc, argv, "f:h",
|
| 1420 |
long_options, &option_index); |
| 1421 |
if (c == -1) { |
| 1422 |
break;
|
| 1423 |
} |
| 1424 |
switch(c) {
|
| 1425 |
case '?': |
| 1426 |
case 'h': |
| 1427 |
help(); |
| 1428 |
break;
|
| 1429 |
case 'f': |
| 1430 |
fmt = optarg; |
| 1431 |
break;
|
| 1432 |
case OPTION_OUTPUT:
|
| 1433 |
output = optarg; |
| 1434 |
break;
|
| 1435 |
case OPTION_BACKING_CHAIN:
|
| 1436 |
chain = true;
|
| 1437 |
break;
|
| 1438 |
} |
| 1439 |
} |
| 1440 |
if (optind >= argc) {
|
| 1441 |
help(); |
| 1442 |
} |
| 1443 |
filename = argv[optind++]; |
| 1444 |
|
| 1445 |
if (output && !strcmp(output, "json")) { |
| 1446 |
output_format = OFORMAT_JSON; |
| 1447 |
} else if (output && !strcmp(output, "human")) { |
| 1448 |
output_format = OFORMAT_HUMAN; |
| 1449 |
} else if (output) { |
| 1450 |
error_report("--output must be used with human or json as argument.");
|
| 1451 |
return 1; |
| 1452 |
} |
| 1453 |
|
| 1454 |
list = collect_image_info_list(filename, fmt, chain); |
| 1455 |
if (!list) {
|
| 1456 |
return 1; |
| 1457 |
} |
| 1458 |
|
| 1459 |
switch (output_format) {
|
| 1460 |
case OFORMAT_HUMAN:
|
| 1461 |
dump_human_image_info_list(list); |
| 1462 |
break;
|
| 1463 |
case OFORMAT_JSON:
|
| 1464 |
if (chain) {
|
| 1465 |
dump_json_image_info_list(list); |
| 1466 |
} else {
|
| 1467 |
dump_json_image_info(list->value); |
| 1468 |
} |
| 1469 |
break;
|
| 1470 |
} |
| 1471 |
|
| 1472 |
qapi_free_ImageInfoList(list); |
| 1473 |
return 0; |
| 1474 |
} |
| 1475 |
|
| 1476 |
#define SNAPSHOT_LIST 1 |
| 1477 |
#define SNAPSHOT_CREATE 2 |
| 1478 |
#define SNAPSHOT_APPLY 3 |
| 1479 |
#define SNAPSHOT_DELETE 4 |
| 1480 |
|
| 1481 |
static int img_snapshot(int argc, char **argv) |
| 1482 |
{
|
| 1483 |
BlockDriverState *bs; |
| 1484 |
QEMUSnapshotInfo sn; |
| 1485 |
char *filename, *snapshot_name = NULL; |
| 1486 |
int c, ret = 0, bdrv_oflags; |
| 1487 |
int action = 0; |
| 1488 |
qemu_timeval tv; |
| 1489 |
|
| 1490 |
bdrv_oflags = BDRV_O_FLAGS | BDRV_O_RDWR; |
| 1491 |
/* Parse commandline parameters */
|
| 1492 |
for(;;) {
|
| 1493 |
c = getopt(argc, argv, "la:c:d:h");
|
| 1494 |
if (c == -1) { |
| 1495 |
break;
|
| 1496 |
} |
| 1497 |
switch(c) {
|
| 1498 |
case '?': |
| 1499 |
case 'h': |
| 1500 |
help(); |
| 1501 |
return 0; |
| 1502 |
case 'l': |
| 1503 |
if (action) {
|
| 1504 |
help(); |
| 1505 |
return 0; |
| 1506 |
} |
| 1507 |
action = SNAPSHOT_LIST; |
| 1508 |
bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */
|
| 1509 |
break;
|
| 1510 |
case 'a': |
| 1511 |
if (action) {
|
| 1512 |
help(); |
| 1513 |
return 0; |
| 1514 |
} |
| 1515 |
action = SNAPSHOT_APPLY; |
| 1516 |
snapshot_name = optarg; |
| 1517 |
break;
|
| 1518 |
case 'c': |
| 1519 |
if (action) {
|
| 1520 |
help(); |
| 1521 |
return 0; |
| 1522 |
} |
| 1523 |
action = SNAPSHOT_CREATE; |
| 1524 |
snapshot_name = optarg; |
| 1525 |
break;
|
| 1526 |
case 'd': |
| 1527 |
if (action) {
|
| 1528 |
help(); |
| 1529 |
return 0; |
| 1530 |
} |
| 1531 |
action = SNAPSHOT_DELETE; |
| 1532 |
snapshot_name = optarg; |
| 1533 |
break;
|
| 1534 |
} |
| 1535 |
} |
| 1536 |
|
| 1537 |
if (optind >= argc) {
|
| 1538 |
help(); |
| 1539 |
} |
| 1540 |
filename = argv[optind++]; |
| 1541 |
|
| 1542 |
/* Open the image */
|
| 1543 |
bs = bdrv_new_open(filename, NULL, bdrv_oflags, true); |
| 1544 |
if (!bs) {
|
| 1545 |
return 1; |
| 1546 |
} |
| 1547 |
|
| 1548 |
/* Perform the requested action */
|
| 1549 |
switch(action) {
|
| 1550 |
case SNAPSHOT_LIST:
|
| 1551 |
dump_snapshots(bs); |
| 1552 |
break;
|
| 1553 |
|
| 1554 |
case SNAPSHOT_CREATE:
|
| 1555 |
memset(&sn, 0, sizeof(sn)); |
| 1556 |
pstrcpy(sn.name, sizeof(sn.name), snapshot_name);
|
| 1557 |
|
| 1558 |
qemu_gettimeofday(&tv); |
| 1559 |
sn.date_sec = tv.tv_sec; |
| 1560 |
sn.date_nsec = tv.tv_usec * 1000;
|
| 1561 |
|
| 1562 |
ret = bdrv_snapshot_create(bs, &sn); |
| 1563 |
if (ret) {
|
| 1564 |
error_report("Could not create snapshot '%s': %d (%s)",
|
| 1565 |
snapshot_name, ret, strerror(-ret)); |
| 1566 |
} |
| 1567 |
break;
|
| 1568 |
|
| 1569 |
case SNAPSHOT_APPLY:
|
| 1570 |
ret = bdrv_snapshot_goto(bs, snapshot_name); |
| 1571 |
if (ret) {
|
| 1572 |
error_report("Could not apply snapshot '%s': %d (%s)",
|
| 1573 |
snapshot_name, ret, strerror(-ret)); |
| 1574 |
} |
| 1575 |
break;
|
| 1576 |
|
| 1577 |
case SNAPSHOT_DELETE:
|
| 1578 |
ret = bdrv_snapshot_delete(bs, snapshot_name); |
| 1579 |
if (ret) {
|
| 1580 |
error_report("Could not delete snapshot '%s': %d (%s)",
|
| 1581 |
snapshot_name, ret, strerror(-ret)); |
| 1582 |
} |
| 1583 |
break;
|
| 1584 |
} |
| 1585 |
|
| 1586 |
/* Cleanup */
|
| 1587 |
bdrv_delete(bs); |
| 1588 |
if (ret) {
|
| 1589 |
return 1; |
| 1590 |
} |
| 1591 |
return 0; |
| 1592 |
} |
| 1593 |
|
| 1594 |
static int img_rebase(int argc, char **argv) |
| 1595 |
{
|
| 1596 |
BlockDriverState *bs, *bs_old_backing = NULL, *bs_new_backing = NULL; |
| 1597 |
BlockDriver *old_backing_drv, *new_backing_drv; |
| 1598 |
char *filename;
|
| 1599 |
const char *fmt, *cache, *out_basefmt, *out_baseimg; |
| 1600 |
int c, flags, ret;
|
| 1601 |
int unsafe = 0; |
| 1602 |
int progress = 0; |
| 1603 |
|
| 1604 |
/* Parse commandline parameters */
|
| 1605 |
fmt = NULL;
|
| 1606 |
cache = BDRV_DEFAULT_CACHE; |
| 1607 |
out_baseimg = NULL;
|
| 1608 |
out_basefmt = NULL;
|
| 1609 |
for(;;) {
|
| 1610 |
c = getopt(argc, argv, "uhf:F:b:pt:");
|
| 1611 |
if (c == -1) { |
| 1612 |
break;
|
| 1613 |
} |
| 1614 |
switch(c) {
|
| 1615 |
case '?': |
| 1616 |
case 'h': |
| 1617 |
help(); |
| 1618 |
return 0; |
| 1619 |
case 'f': |
| 1620 |
fmt = optarg; |
| 1621 |
break;
|
| 1622 |
case 'F': |
| 1623 |
out_basefmt = optarg; |
| 1624 |
break;
|
| 1625 |
case 'b': |
| 1626 |
out_baseimg = optarg; |
| 1627 |
break;
|
| 1628 |
case 'u': |
| 1629 |
unsafe = 1;
|
| 1630 |
break;
|
| 1631 |
case 'p': |
| 1632 |
progress = 1;
|
| 1633 |
break;
|
| 1634 |
case 't': |
| 1635 |
cache = optarg; |
| 1636 |
break;
|
| 1637 |
} |
| 1638 |
} |
| 1639 |
|
| 1640 |
if ((optind >= argc) || (!unsafe && !out_baseimg)) {
|
| 1641 |
help(); |
| 1642 |
} |
| 1643 |
filename = argv[optind++]; |
| 1644 |
|
| 1645 |
qemu_progress_init(progress, 2.0); |
| 1646 |
qemu_progress_print(0, 100); |
| 1647 |
|
| 1648 |
flags = BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0);
|
| 1649 |
ret = bdrv_parse_cache_flags(cache, &flags); |
| 1650 |
if (ret < 0) { |
| 1651 |
error_report("Invalid cache option: %s", cache);
|
| 1652 |
return -1; |
| 1653 |
} |
| 1654 |
|
| 1655 |
/*
|
| 1656 |
* Open the images.
|
| 1657 |
*
|
| 1658 |
* Ignore the old backing file for unsafe rebase in case we want to correct
|
| 1659 |
* the reference to a renamed or moved backing file.
|
| 1660 |
*/
|
| 1661 |
bs = bdrv_new_open(filename, fmt, flags, true);
|
| 1662 |
if (!bs) {
|
| 1663 |
return 1; |
| 1664 |
} |
| 1665 |
|
| 1666 |
/* Find the right drivers for the backing files */
|
| 1667 |
old_backing_drv = NULL;
|
| 1668 |
new_backing_drv = NULL;
|
| 1669 |
|
| 1670 |
if (!unsafe && bs->backing_format[0] != '\0') { |
| 1671 |
old_backing_drv = bdrv_find_format(bs->backing_format); |
| 1672 |
if (old_backing_drv == NULL) { |
| 1673 |
error_report("Invalid format name: '%s'", bs->backing_format);
|
| 1674 |
ret = -1;
|
| 1675 |
goto out;
|
| 1676 |
} |
| 1677 |
} |
| 1678 |
|
| 1679 |
if (out_basefmt != NULL) { |
| 1680 |
new_backing_drv = bdrv_find_format(out_basefmt); |
| 1681 |
if (new_backing_drv == NULL) { |
| 1682 |
error_report("Invalid format name: '%s'", out_basefmt);
|
| 1683 |
ret = -1;
|
| 1684 |
goto out;
|
| 1685 |
} |
| 1686 |
} |
| 1687 |
|
| 1688 |
/* For safe rebasing we need to compare old and new backing file */
|
| 1689 |
if (unsafe) {
|
| 1690 |
/* Make the compiler happy */
|
| 1691 |
bs_old_backing = NULL;
|
| 1692 |
bs_new_backing = NULL;
|
| 1693 |
} else {
|
| 1694 |
char backing_name[1024]; |
| 1695 |
|
| 1696 |
bs_old_backing = bdrv_new("old_backing");
|
| 1697 |
bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name));
|
| 1698 |
ret = bdrv_open(bs_old_backing, backing_name, BDRV_O_FLAGS, |
| 1699 |
old_backing_drv); |
| 1700 |
if (ret) {
|
| 1701 |
error_report("Could not open old backing file '%s'", backing_name);
|
| 1702 |
goto out;
|
| 1703 |
} |
| 1704 |
if (out_baseimg[0]) { |
| 1705 |
bs_new_backing = bdrv_new("new_backing");
|
| 1706 |
ret = bdrv_open(bs_new_backing, out_baseimg, BDRV_O_FLAGS, |
| 1707 |
new_backing_drv); |
| 1708 |
if (ret) {
|
| 1709 |
error_report("Could not open new backing file '%s'",
|
| 1710 |
out_baseimg); |
| 1711 |
goto out;
|
| 1712 |
} |
| 1713 |
} |
| 1714 |
} |
| 1715 |
|
| 1716 |
/*
|
| 1717 |
* Check each unallocated cluster in the COW file. If it is unallocated,
|
| 1718 |
* accesses go to the backing file. We must therefore compare this cluster
|
| 1719 |
* in the old and new backing file, and if they differ we need to copy it
|
| 1720 |
* from the old backing file into the COW file.
|
| 1721 |
*
|
| 1722 |
* If qemu-img crashes during this step, no harm is done. The content of
|
| 1723 |
* the image is the same as the original one at any time.
|
| 1724 |
*/
|
| 1725 |
if (!unsafe) {
|
| 1726 |
uint64_t num_sectors; |
| 1727 |
uint64_t old_backing_num_sectors; |
| 1728 |
uint64_t new_backing_num_sectors = 0;
|
| 1729 |
uint64_t sector; |
| 1730 |
int n;
|
| 1731 |
uint8_t * buf_old; |
| 1732 |
uint8_t * buf_new; |
| 1733 |
float local_progress = 0; |
| 1734 |
|
| 1735 |
buf_old = qemu_blockalign(bs, IO_BUF_SIZE); |
| 1736 |
buf_new = qemu_blockalign(bs, IO_BUF_SIZE); |
| 1737 |
|
| 1738 |
bdrv_get_geometry(bs, &num_sectors); |
| 1739 |
bdrv_get_geometry(bs_old_backing, &old_backing_num_sectors); |
| 1740 |
if (bs_new_backing) {
|
| 1741 |
bdrv_get_geometry(bs_new_backing, &new_backing_num_sectors); |
| 1742 |
} |
| 1743 |
|
| 1744 |
if (num_sectors != 0) { |
| 1745 |
local_progress = (float)100 / |
| 1746 |
(num_sectors / MIN(num_sectors, IO_BUF_SIZE / 512));
|
| 1747 |
} |
| 1748 |
|
| 1749 |
for (sector = 0; sector < num_sectors; sector += n) { |
| 1750 |
|
| 1751 |
/* How many sectors can we handle with the next read? */
|
| 1752 |
if (sector + (IO_BUF_SIZE / 512) <= num_sectors) { |
| 1753 |
n = (IO_BUF_SIZE / 512);
|
| 1754 |
} else {
|
| 1755 |
n = num_sectors - sector; |
| 1756 |
} |
| 1757 |
|
| 1758 |
/* If the cluster is allocated, we don't need to take action */
|
| 1759 |
ret = bdrv_is_allocated(bs, sector, n, &n); |
| 1760 |
if (ret) {
|
| 1761 |
continue;
|
| 1762 |
} |
| 1763 |
|
| 1764 |
/*
|
| 1765 |
* Read old and new backing file and take into consideration that
|
| 1766 |
* backing files may be smaller than the COW image.
|
| 1767 |
*/
|
| 1768 |
if (sector >= old_backing_num_sectors) {
|
| 1769 |
memset(buf_old, 0, n * BDRV_SECTOR_SIZE);
|
| 1770 |
} else {
|
| 1771 |
if (sector + n > old_backing_num_sectors) {
|
| 1772 |
n = old_backing_num_sectors - sector; |
| 1773 |
} |
| 1774 |
|
| 1775 |
ret = bdrv_read(bs_old_backing, sector, buf_old, n); |
| 1776 |
if (ret < 0) { |
| 1777 |
error_report("error while reading from old backing file");
|
| 1778 |
goto out;
|
| 1779 |
} |
| 1780 |
} |
| 1781 |
|
| 1782 |
if (sector >= new_backing_num_sectors || !bs_new_backing) {
|
| 1783 |
memset(buf_new, 0, n * BDRV_SECTOR_SIZE);
|
| 1784 |
} else {
|
| 1785 |
if (sector + n > new_backing_num_sectors) {
|
| 1786 |
n = new_backing_num_sectors - sector; |
| 1787 |
} |
| 1788 |
|
| 1789 |
ret = bdrv_read(bs_new_backing, sector, buf_new, n); |
| 1790 |
if (ret < 0) { |
| 1791 |
error_report("error while reading from new backing file");
|
| 1792 |
goto out;
|
| 1793 |
} |
| 1794 |
} |
| 1795 |
|
| 1796 |
/* If they differ, we need to write to the COW file */
|
| 1797 |
uint64_t written = 0;
|
| 1798 |
|
| 1799 |
while (written < n) {
|
| 1800 |
int pnum;
|
| 1801 |
|
| 1802 |
if (compare_sectors(buf_old + written * 512, |
| 1803 |
buf_new + written * 512, n - written, &pnum))
|
| 1804 |
{
|
| 1805 |
ret = bdrv_write(bs, sector + written, |
| 1806 |
buf_old + written * 512, pnum);
|
| 1807 |
if (ret < 0) { |
| 1808 |
error_report("Error while writing to COW image: %s",
|
| 1809 |
strerror(-ret)); |
| 1810 |
goto out;
|
| 1811 |
} |
| 1812 |
} |
| 1813 |
|
| 1814 |
written += pnum; |
| 1815 |
} |
| 1816 |
qemu_progress_print(local_progress, 100);
|
| 1817 |
} |
| 1818 |
|
| 1819 |
qemu_vfree(buf_old); |
| 1820 |
qemu_vfree(buf_new); |
| 1821 |
} |
| 1822 |
|
| 1823 |
/*
|
| 1824 |
* Change the backing file. All clusters that are different from the old
|
| 1825 |
* backing file are overwritten in the COW file now, so the visible content
|
| 1826 |
* doesn't change when we switch the backing file.
|
| 1827 |
*/
|
| 1828 |
if (out_baseimg && *out_baseimg) {
|
| 1829 |
ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt); |
| 1830 |
} else {
|
| 1831 |
ret = bdrv_change_backing_file(bs, NULL, NULL); |
| 1832 |
} |
| 1833 |
|
| 1834 |
if (ret == -ENOSPC) {
|
| 1835 |
error_report("Could not change the backing file to '%s': No "
|
| 1836 |
"space left in the file header", out_baseimg);
|
| 1837 |
} else if (ret < 0) { |
| 1838 |
error_report("Could not change the backing file to '%s': %s",
|
| 1839 |
out_baseimg, strerror(-ret)); |
| 1840 |
} |
| 1841 |
|
| 1842 |
qemu_progress_print(100, 0); |
| 1843 |
/*
|
| 1844 |
* TODO At this point it is possible to check if any clusters that are
|
| 1845 |
* allocated in the COW file are the same in the backing file. If so, they
|
| 1846 |
* could be dropped from the COW file. Don't do this before switching the
|
| 1847 |
* backing file, in case of a crash this would lead to corruption.
|
| 1848 |
*/
|
| 1849 |
out:
|
| 1850 |
qemu_progress_end(); |
| 1851 |
/* Cleanup */
|
| 1852 |
if (!unsafe) {
|
| 1853 |
if (bs_old_backing != NULL) { |
| 1854 |
bdrv_delete(bs_old_backing); |
| 1855 |
} |
| 1856 |
if (bs_new_backing != NULL) { |
| 1857 |
bdrv_delete(bs_new_backing); |
| 1858 |
} |
| 1859 |
} |
| 1860 |
|
| 1861 |
bdrv_delete(bs); |
| 1862 |
if (ret) {
|
| 1863 |
return 1; |
| 1864 |
} |
| 1865 |
return 0; |
| 1866 |
} |
| 1867 |
|
| 1868 |
static int img_resize(int argc, char **argv) |
| 1869 |
{
|
| 1870 |
int c, ret, relative;
|
| 1871 |
const char *filename, *fmt, *size; |
| 1872 |
int64_t n, total_size; |
| 1873 |
BlockDriverState *bs = NULL;
|
| 1874 |
QemuOpts *param; |
| 1875 |
static QemuOptsList resize_options = {
|
| 1876 |
.name = "resize_options",
|
| 1877 |
.head = QTAILQ_HEAD_INITIALIZER(resize_options.head), |
| 1878 |
.desc = {
|
| 1879 |
{
|
| 1880 |
.name = BLOCK_OPT_SIZE, |
| 1881 |
.type = QEMU_OPT_SIZE, |
| 1882 |
.help = "Virtual disk size"
|
| 1883 |
}, {
|
| 1884 |
/* end of list */
|
| 1885 |
} |
| 1886 |
}, |
| 1887 |
}; |
| 1888 |
|
| 1889 |
/* Remove size from argv manually so that negative numbers are not treated
|
| 1890 |
* as options by getopt. */
|
| 1891 |
if (argc < 3) { |
| 1892 |
help(); |
| 1893 |
return 1; |
| 1894 |
} |
| 1895 |
|
| 1896 |
size = argv[--argc]; |
| 1897 |
|
| 1898 |
/* Parse getopt arguments */
|
| 1899 |
fmt = NULL;
|
| 1900 |
for(;;) {
|
| 1901 |
c = getopt(argc, argv, "f:h");
|
| 1902 |
if (c == -1) { |
| 1903 |
break;
|
| 1904 |
} |
| 1905 |
switch(c) {
|
| 1906 |
case '?': |
| 1907 |
case 'h': |
| 1908 |
help(); |
| 1909 |
break;
|
| 1910 |
case 'f': |
| 1911 |
fmt = optarg; |
| 1912 |
break;
|
| 1913 |
} |
| 1914 |
} |
| 1915 |
if (optind >= argc) {
|
| 1916 |
help(); |
| 1917 |
} |
| 1918 |
filename = argv[optind++]; |
| 1919 |
|
| 1920 |
/* Choose grow, shrink, or absolute resize mode */
|
| 1921 |
switch (size[0]) { |
| 1922 |
case '+': |
| 1923 |
relative = 1;
|
| 1924 |
size++; |
| 1925 |
break;
|
| 1926 |
case '-': |
| 1927 |
relative = -1;
|
| 1928 |
size++; |
| 1929 |
break;
|
| 1930 |
default:
|
| 1931 |
relative = 0;
|
| 1932 |
break;
|
| 1933 |
} |
| 1934 |
|
| 1935 |
/* Parse size */
|
| 1936 |
param = qemu_opts_create(&resize_options, NULL, 0, NULL); |
| 1937 |
if (qemu_opt_set(param, BLOCK_OPT_SIZE, size)) {
|
| 1938 |
/* Error message already printed when size parsing fails */
|
| 1939 |
ret = -1;
|
| 1940 |
qemu_opts_del(param); |
| 1941 |
goto out;
|
| 1942 |
} |
| 1943 |
n = qemu_opt_get_size(param, BLOCK_OPT_SIZE, 0);
|
| 1944 |
qemu_opts_del(param); |
| 1945 |
|
| 1946 |
bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR, true);
|
| 1947 |
if (!bs) {
|
| 1948 |
ret = -1;
|
| 1949 |
goto out;
|
| 1950 |
} |
| 1951 |
|
| 1952 |
if (relative) {
|
| 1953 |
total_size = bdrv_getlength(bs) + n * relative; |
| 1954 |
} else {
|
| 1955 |
total_size = n; |
| 1956 |
} |
| 1957 |
if (total_size <= 0) { |
| 1958 |
error_report("New image size must be positive");
|
| 1959 |
ret = -1;
|
| 1960 |
goto out;
|
| 1961 |
} |
| 1962 |
|
| 1963 |
ret = bdrv_truncate(bs, total_size); |
| 1964 |
switch (ret) {
|
| 1965 |
case 0: |
| 1966 |
printf("Image resized.\n");
|
| 1967 |
break;
|
| 1968 |
case -ENOTSUP:
|
| 1969 |
error_report("This image does not support resize");
|
| 1970 |
break;
|
| 1971 |
case -EACCES:
|
| 1972 |
error_report("Image is read-only");
|
| 1973 |
break;
|
| 1974 |
default:
|
| 1975 |
error_report("Error resizing image (%d)", -ret);
|
| 1976 |
break;
|
| 1977 |
} |
| 1978 |
out:
|
| 1979 |
if (bs) {
|
| 1980 |
bdrv_delete(bs); |
| 1981 |
} |
| 1982 |
if (ret) {
|
| 1983 |
return 1; |
| 1984 |
} |
| 1985 |
return 0; |
| 1986 |
} |
| 1987 |
|
| 1988 |
static const img_cmd_t img_cmds[] = { |
| 1989 |
#define DEF(option, callback, arg_string) \
|
| 1990 |
{ option, callback },
|
| 1991 |
#include "qemu-img-cmds.h" |
| 1992 |
#undef DEF
|
| 1993 |
#undef GEN_DOCS
|
| 1994 |
{ NULL, NULL, },
|
| 1995 |
}; |
| 1996 |
|
| 1997 |
int main(int argc, char **argv) |
| 1998 |
{
|
| 1999 |
const img_cmd_t *cmd;
|
| 2000 |
const char *cmdname; |
| 2001 |
|
| 2002 |
error_set_progname(argv[0]);
|
| 2003 |
|
| 2004 |
bdrv_init(); |
| 2005 |
if (argc < 2) |
| 2006 |
help(); |
| 2007 |
cmdname = argv[1];
|
| 2008 |
argc--; argv++; |
| 2009 |
|
| 2010 |
qemu_init_main_loop(); |
| 2011 |
|
| 2012 |
/* find the command */
|
| 2013 |
for(cmd = img_cmds; cmd->name != NULL; cmd++) { |
| 2014 |
if (!strcmp(cmdname, cmd->name)) {
|
| 2015 |
return cmd->handler(argc, argv);
|
| 2016 |
} |
| 2017 |
} |
| 2018 |
|
| 2019 |
/* not found */
|
| 2020 |
help(); |
| 2021 |
return 0; |
| 2022 |
} |