Valid description taken from qemu-img.texi, although it would be better to have this information recorded in only one place. Signed-off-by: Pierre Riteau <Pierre.Riteau@irisa.fr> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
1066 lines
30 KiB
C
1066 lines
30 KiB
C
/*
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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 "qemu-common.h"
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#include "qemu-option.h"
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#include "osdep.h"
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#include "block_int.h"
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#include <stdio.h>
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#ifdef _WIN32
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#include <windows.h>
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#endif
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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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/* Default to cache=writeback as data integrity is not important for qemu-tcg. */
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#define BRDV_O_FLAGS BDRV_O_CACHE_WB
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static void QEMU_NORETURN error(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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fprintf(stderr, "qemu-img: ");
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vfprintf(stderr, fmt, ap);
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fprintf(stderr, "\n");
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exit(1);
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va_end(ap);
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}
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static void format_print(void *opaque, const char *name)
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{
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printf(" %s", name);
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}
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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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printf("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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" '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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" '-h' with or without a command shows this help and lists the supported formats\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("\nSupported formats:");
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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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#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);
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i = 0;
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for(;;) {
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c = getchar();
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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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#else
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#include <termios.h>
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static struct termios oldtty;
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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;
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tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
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|INLCR|IGNCR|ICRNL|IXON);
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tty.c_oflag |= OPOST;
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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;
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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);
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}
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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();
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i = 0;
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for(;;) {
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ret = read(0, &ch, 1);
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if (ret == -1) {
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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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}
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} 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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}
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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 BlockDriverState *bdrv_new_open(const char *filename,
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const char *fmt)
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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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bs = bdrv_new("");
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if (!bs)
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error("Not enough memory");
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if (fmt) {
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drv = bdrv_find_format(fmt);
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if (!drv)
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error("Unknown file format '%s'", fmt);
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} else {
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drv = NULL;
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}
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if (bdrv_open2(bs, filename, BRDV_O_FLAGS, drv) < 0) {
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error("Could not open '%s'", filename);
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}
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if (bdrv_is_encrypted(bs)) {
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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("No password given");
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if (bdrv_set_key(bs, password) < 0)
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error("invalid password");
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}
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return bs;
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}
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static void add_old_style_options(const char *fmt, QEMUOptionParameter *list,
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int flags, const char *base_filename, const char *base_fmt)
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{
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if (flags & BLOCK_FLAG_ENCRYPT) {
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if (set_option_parameter(list, BLOCK_OPT_ENCRYPT, "on")) {
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error("Encryption not supported for file format '%s'", fmt);
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}
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}
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if (flags & BLOCK_FLAG_COMPAT6) {
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if (set_option_parameter(list, BLOCK_OPT_COMPAT6, "on")) {
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error("VMDK version 6 not supported for file format '%s'", fmt);
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}
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}
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if (base_filename) {
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if (set_option_parameter(list, BLOCK_OPT_BACKING_FILE, base_filename)) {
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error("Backing file not supported for file format '%s'", fmt);
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}
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}
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if (base_fmt) {
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if (set_option_parameter(list, BLOCK_OPT_BACKING_FMT, base_fmt)) {
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error("Backing file format not supported for file format '%s'", fmt);
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}
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}
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}
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static int img_create(int argc, char **argv)
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{
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int c, ret, flags;
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const char *fmt = "raw";
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const char *base_fmt = NULL;
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const char *filename;
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const char *base_filename = NULL;
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BlockDriver *drv;
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QEMUOptionParameter *param = NULL;
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char *options = NULL;
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flags = 0;
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for(;;) {
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c = getopt(argc, argv, "F:b:f:he6o:");
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if (c == -1)
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break;
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switch(c) {
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case 'h':
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help();
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break;
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case 'F':
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base_fmt = optarg;
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break;
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case 'b':
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base_filename = optarg;
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break;
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case 'f':
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fmt = optarg;
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break;
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case 'e':
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flags |= BLOCK_FLAG_ENCRYPT;
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break;
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case '6':
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flags |= BLOCK_FLAG_COMPAT6;
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break;
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case 'o':
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options = optarg;
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break;
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}
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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("Unknown file format '%s'", fmt);
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if (options && !strcmp(options, "?")) {
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print_option_help(drv->create_options);
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return 0;
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}
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/* Create parameter list with default values */
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param = parse_option_parameters("", drv->create_options, param);
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set_option_parameter_int(param, BLOCK_OPT_SIZE, -1);
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/* Parse -o options */
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if (options) {
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param = parse_option_parameters(options, drv->create_options, param);
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if (param == NULL) {
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error("Invalid options for file format '%s'.", fmt);
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}
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}
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/* Get the filename */
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if (optind >= argc)
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help();
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filename = argv[optind++];
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/* Add size to parameters */
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if (optind < argc) {
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set_option_parameter(param, BLOCK_OPT_SIZE, argv[optind++]);
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}
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/* Add old-style options to parameters */
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add_old_style_options(fmt, param, flags, base_filename, base_fmt);
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// The size for the image must always be specified, with one exception:
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// If we are using a backing file, we can obtain the size from there
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if (get_option_parameter(param, BLOCK_OPT_SIZE)->value.n == -1) {
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QEMUOptionParameter *backing_file =
|
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get_option_parameter(param, BLOCK_OPT_BACKING_FILE);
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QEMUOptionParameter *backing_fmt =
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get_option_parameter(param, BLOCK_OPT_BACKING_FMT);
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if (backing_file && backing_file->value.s) {
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BlockDriverState *bs;
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uint64_t size;
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const char *fmt = NULL;
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char buf[32];
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if (backing_fmt && backing_fmt->value.s) {
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if (bdrv_find_format(backing_fmt->value.s)) {
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fmt = backing_fmt->value.s;
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} else {
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error("Unknown backing file format '%s'",
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backing_fmt->value.s);
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}
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}
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bs = bdrv_new_open(backing_file->value.s, fmt);
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bdrv_get_geometry(bs, &size);
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size *= 512;
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bdrv_delete(bs);
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snprintf(buf, sizeof(buf), "%" PRId64, size);
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set_option_parameter(param, BLOCK_OPT_SIZE, buf);
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} else {
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error("Image creation needs a size parameter");
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}
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}
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printf("Formatting '%s', fmt=%s ", filename, fmt);
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print_option_parameters(param);
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puts("");
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ret = bdrv_create(drv, filename, param);
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free_option_parameters(param);
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if (ret < 0) {
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if (ret == -ENOTSUP) {
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error("Formatting or formatting option not supported for file format '%s'", fmt);
|
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} else if (ret == -EFBIG) {
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error("The image size is too large for file format '%s'", fmt);
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} else {
|
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error("Error while formatting");
|
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}
|
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}
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return 0;
|
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}
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|
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static int img_check(int argc, char **argv)
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{
|
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int c, ret;
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const char *filename, *fmt;
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BlockDriver *drv;
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BlockDriverState *bs;
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fmt = NULL;
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for(;;) {
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c = getopt(argc, argv, "f:h");
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if (c == -1)
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break;
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switch(c) {
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case 'h':
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help();
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break;
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case 'f':
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fmt = optarg;
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break;
|
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}
|
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}
|
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if (optind >= argc)
|
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help();
|
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filename = argv[optind++];
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bs = bdrv_new("");
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if (!bs)
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error("Not enough memory");
|
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if (fmt) {
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drv = bdrv_find_format(fmt);
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if (!drv)
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error("Unknown file format '%s'", fmt);
|
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} else {
|
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drv = NULL;
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}
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if (bdrv_open2(bs, filename, BRDV_O_FLAGS, drv) < 0) {
|
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error("Could not open '%s'", filename);
|
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}
|
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ret = bdrv_check(bs);
|
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switch(ret) {
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case 0:
|
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printf("No errors were found on the image.\n");
|
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break;
|
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case -ENOTSUP:
|
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error("This image format does not support checks");
|
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break;
|
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default:
|
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if (ret < 0) {
|
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error("An error occurred during the check");
|
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} else {
|
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printf("%d errors were found on the image.\n", ret);
|
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}
|
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break;
|
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}
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|
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bdrv_delete(bs);
|
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return 0;
|
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}
|
|
|
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static int img_commit(int argc, char **argv)
|
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{
|
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int c, ret;
|
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const char *filename, *fmt;
|
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BlockDriver *drv;
|
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BlockDriverState *bs;
|
|
|
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fmt = NULL;
|
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for(;;) {
|
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c = getopt(argc, argv, "f:h");
|
|
if (c == -1)
|
|
break;
|
|
switch(c) {
|
|
case 'h':
|
|
help();
|
|
break;
|
|
case 'f':
|
|
fmt = optarg;
|
|
break;
|
|
}
|
|
}
|
|
if (optind >= argc)
|
|
help();
|
|
filename = argv[optind++];
|
|
|
|
bs = bdrv_new("");
|
|
if (!bs)
|
|
error("Not enough memory");
|
|
if (fmt) {
|
|
drv = bdrv_find_format(fmt);
|
|
if (!drv)
|
|
error("Unknown file format '%s'", fmt);
|
|
} else {
|
|
drv = NULL;
|
|
}
|
|
if (bdrv_open2(bs, filename, BRDV_O_FLAGS, drv) < 0) {
|
|
error("Could not open '%s'", filename);
|
|
}
|
|
ret = bdrv_commit(bs);
|
|
switch(ret) {
|
|
case 0:
|
|
printf("Image committed.\n");
|
|
break;
|
|
case -ENOENT:
|
|
error("No disk inserted");
|
|
break;
|
|
case -EACCES:
|
|
error("Image is read-only");
|
|
break;
|
|
case -ENOTSUP:
|
|
error("Image is already committed");
|
|
break;
|
|
default:
|
|
error("Error while committing image");
|
|
break;
|
|
}
|
|
|
|
bdrv_delete(bs);
|
|
return 0;
|
|
}
|
|
|
|
static int is_not_zero(const uint8_t *sector, int len)
|
|
{
|
|
int i;
|
|
len >>= 2;
|
|
for(i = 0;i < len; i++) {
|
|
if (((uint32_t *)sector)[i] != 0)
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Returns true iff the first sector pointed to by 'buf' contains at least
|
|
* a non-NUL byte.
|
|
*
|
|
* 'pnum' is set to the number of sectors (including and immediately following
|
|
* the first one) that are known to be in the same allocated/unallocated state.
|
|
*/
|
|
static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum)
|
|
{
|
|
int v, i;
|
|
|
|
if (n <= 0) {
|
|
*pnum = 0;
|
|
return 0;
|
|
}
|
|
v = is_not_zero(buf, 512);
|
|
for(i = 1; i < n; i++) {
|
|
buf += 512;
|
|
if (v != is_not_zero(buf, 512))
|
|
break;
|
|
}
|
|
*pnum = i;
|
|
return v;
|
|
}
|
|
|
|
#define IO_BUF_SIZE (2 * 1024 * 1024)
|
|
|
|
static int img_convert(int argc, char **argv)
|
|
{
|
|
int c, ret, n, n1, bs_n, bs_i, flags, cluster_size, cluster_sectors;
|
|
const char *fmt, *out_fmt, *out_baseimg, *out_filename;
|
|
BlockDriver *drv;
|
|
BlockDriverState **bs, *out_bs;
|
|
int64_t total_sectors, nb_sectors, sector_num, bs_offset;
|
|
uint64_t bs_sectors;
|
|
uint8_t buf[IO_BUF_SIZE];
|
|
const uint8_t *buf1;
|
|
BlockDriverInfo bdi;
|
|
QEMUOptionParameter *param = NULL;
|
|
char *options = NULL;
|
|
|
|
fmt = NULL;
|
|
out_fmt = "raw";
|
|
out_baseimg = NULL;
|
|
flags = 0;
|
|
for(;;) {
|
|
c = getopt(argc, argv, "f:O:B:hce6o:");
|
|
if (c == -1)
|
|
break;
|
|
switch(c) {
|
|
case 'h':
|
|
help();
|
|
break;
|
|
case 'f':
|
|
fmt = optarg;
|
|
break;
|
|
case 'O':
|
|
out_fmt = optarg;
|
|
break;
|
|
case 'B':
|
|
out_baseimg = optarg;
|
|
break;
|
|
case 'c':
|
|
flags |= BLOCK_FLAG_COMPRESS;
|
|
break;
|
|
case 'e':
|
|
flags |= BLOCK_FLAG_ENCRYPT;
|
|
break;
|
|
case '6':
|
|
flags |= BLOCK_FLAG_COMPAT6;
|
|
break;
|
|
case 'o':
|
|
options = optarg;
|
|
break;
|
|
}
|
|
}
|
|
|
|
bs_n = argc - optind - 1;
|
|
if (bs_n < 1) help();
|
|
|
|
out_filename = argv[argc - 1];
|
|
|
|
if (bs_n > 1 && out_baseimg)
|
|
error("-B makes no sense when concatenating multiple input images");
|
|
|
|
bs = calloc(bs_n, sizeof(BlockDriverState *));
|
|
if (!bs)
|
|
error("Out of memory");
|
|
|
|
total_sectors = 0;
|
|
for (bs_i = 0; bs_i < bs_n; bs_i++) {
|
|
bs[bs_i] = bdrv_new_open(argv[optind + bs_i], fmt);
|
|
if (!bs[bs_i])
|
|
error("Could not open '%s'", argv[optind + bs_i]);
|
|
bdrv_get_geometry(bs[bs_i], &bs_sectors);
|
|
total_sectors += bs_sectors;
|
|
}
|
|
|
|
/* Find driver and parse its options */
|
|
drv = bdrv_find_format(out_fmt);
|
|
if (!drv)
|
|
error("Unknown file format '%s'", out_fmt);
|
|
|
|
if (options && !strcmp(options, "?")) {
|
|
print_option_help(drv->create_options);
|
|
return 0;
|
|
}
|
|
|
|
if (options) {
|
|
param = parse_option_parameters(options, drv->create_options, param);
|
|
if (param == NULL) {
|
|
error("Invalid options for file format '%s'.", out_fmt);
|
|
}
|
|
} else {
|
|
param = parse_option_parameters("", drv->create_options, param);
|
|
}
|
|
|
|
set_option_parameter_int(param, BLOCK_OPT_SIZE, total_sectors * 512);
|
|
add_old_style_options(out_fmt, param, flags, out_baseimg, NULL);
|
|
|
|
/* Check if compression is supported */
|
|
if (flags & BLOCK_FLAG_COMPRESS) {
|
|
QEMUOptionParameter *encryption =
|
|
get_option_parameter(param, BLOCK_OPT_ENCRYPT);
|
|
|
|
if (!drv->bdrv_write_compressed) {
|
|
error("Compression not supported for this file format");
|
|
}
|
|
|
|
if (encryption && encryption->value.n) {
|
|
error("Compression and encryption not supported at the same time");
|
|
}
|
|
}
|
|
|
|
/* Create the new image */
|
|
ret = bdrv_create(drv, out_filename, param);
|
|
free_option_parameters(param);
|
|
|
|
if (ret < 0) {
|
|
if (ret == -ENOTSUP) {
|
|
error("Formatting not supported for file format '%s'", out_fmt);
|
|
} else if (ret == -EFBIG) {
|
|
error("The image size is too large for file format '%s'", out_fmt);
|
|
} else {
|
|
error("Error while formatting '%s'", out_filename);
|
|
}
|
|
}
|
|
|
|
out_bs = bdrv_new_open(out_filename, out_fmt);
|
|
|
|
bs_i = 0;
|
|
bs_offset = 0;
|
|
bdrv_get_geometry(bs[0], &bs_sectors);
|
|
|
|
if (flags & BLOCK_FLAG_COMPRESS) {
|
|
if (bdrv_get_info(out_bs, &bdi) < 0)
|
|
error("could not get block driver info");
|
|
cluster_size = bdi.cluster_size;
|
|
if (cluster_size <= 0 || cluster_size > IO_BUF_SIZE)
|
|
error("invalid cluster size");
|
|
cluster_sectors = cluster_size >> 9;
|
|
sector_num = 0;
|
|
for(;;) {
|
|
int64_t bs_num;
|
|
int remainder;
|
|
uint8_t *buf2;
|
|
|
|
nb_sectors = total_sectors - sector_num;
|
|
if (nb_sectors <= 0)
|
|
break;
|
|
if (nb_sectors >= cluster_sectors)
|
|
n = cluster_sectors;
|
|
else
|
|
n = nb_sectors;
|
|
|
|
bs_num = sector_num - bs_offset;
|
|
assert (bs_num >= 0);
|
|
remainder = n;
|
|
buf2 = buf;
|
|
while (remainder > 0) {
|
|
int nlow;
|
|
while (bs_num == bs_sectors) {
|
|
bs_i++;
|
|
assert (bs_i < bs_n);
|
|
bs_offset += bs_sectors;
|
|
bdrv_get_geometry(bs[bs_i], &bs_sectors);
|
|
bs_num = 0;
|
|
/* printf("changing part: sector_num=%lld, "
|
|
"bs_i=%d, bs_offset=%lld, bs_sectors=%lld\n",
|
|
sector_num, bs_i, bs_offset, bs_sectors); */
|
|
}
|
|
assert (bs_num < bs_sectors);
|
|
|
|
nlow = (remainder > bs_sectors - bs_num) ? bs_sectors - bs_num : remainder;
|
|
|
|
if (bdrv_read(bs[bs_i], bs_num, buf2, nlow) < 0)
|
|
error("error while reading");
|
|
|
|
buf2 += nlow * 512;
|
|
bs_num += nlow;
|
|
|
|
remainder -= nlow;
|
|
}
|
|
assert (remainder == 0);
|
|
|
|
if (n < cluster_sectors)
|
|
memset(buf + n * 512, 0, cluster_size - n * 512);
|
|
if (is_not_zero(buf, cluster_size)) {
|
|
if (bdrv_write_compressed(out_bs, sector_num, buf,
|
|
cluster_sectors) != 0)
|
|
error("error while compressing sector %" PRId64,
|
|
sector_num);
|
|
}
|
|
sector_num += n;
|
|
}
|
|
/* signal EOF to align */
|
|
bdrv_write_compressed(out_bs, 0, NULL, 0);
|
|
} else {
|
|
sector_num = 0; // total number of sectors converted so far
|
|
for(;;) {
|
|
nb_sectors = total_sectors - sector_num;
|
|
if (nb_sectors <= 0)
|
|
break;
|
|
if (nb_sectors >= (IO_BUF_SIZE / 512))
|
|
n = (IO_BUF_SIZE / 512);
|
|
else
|
|
n = nb_sectors;
|
|
|
|
while (sector_num - bs_offset >= bs_sectors) {
|
|
bs_i ++;
|
|
assert (bs_i < bs_n);
|
|
bs_offset += bs_sectors;
|
|
bdrv_get_geometry(bs[bs_i], &bs_sectors);
|
|
/* printf("changing part: sector_num=%lld, bs_i=%d, "
|
|
"bs_offset=%lld, bs_sectors=%lld\n",
|
|
sector_num, bs_i, bs_offset, bs_sectors); */
|
|
}
|
|
|
|
if (n > bs_offset + bs_sectors - sector_num)
|
|
n = bs_offset + bs_sectors - sector_num;
|
|
|
|
if (!drv->no_zero_init) {
|
|
/* If the output image is being created as a copy on write image,
|
|
assume that sectors which are unallocated in the input image
|
|
are present in both the output's and input's base images (no
|
|
need to copy them). */
|
|
if (out_baseimg) {
|
|
if (!bdrv_is_allocated(bs[bs_i], sector_num - bs_offset,
|
|
n, &n1)) {
|
|
sector_num += n1;
|
|
continue;
|
|
}
|
|
/* The next 'n1' sectors are allocated in the input image. Copy
|
|
only those as they may be followed by unallocated sectors. */
|
|
n = n1;
|
|
}
|
|
} else {
|
|
n1 = n;
|
|
}
|
|
|
|
if (bdrv_read(bs[bs_i], sector_num - bs_offset, buf, n) < 0)
|
|
error("error while reading");
|
|
/* NOTE: at the same time we convert, we do not write zero
|
|
sectors to have a chance to compress the image. Ideally, we
|
|
should add a specific call to have the info to go faster */
|
|
buf1 = buf;
|
|
while (n > 0) {
|
|
/* If the output image is being created as a copy on write image,
|
|
copy all sectors even the ones containing only NUL bytes,
|
|
because they may differ from the sectors in the base image.
|
|
|
|
If the output is to a host device, we also write out
|
|
sectors that are entirely 0, since whatever data was
|
|
already there is garbage, not 0s. */
|
|
if (drv->no_zero_init || out_baseimg ||
|
|
is_allocated_sectors(buf1, n, &n1)) {
|
|
if (bdrv_write(out_bs, sector_num, buf1, n1) < 0)
|
|
error("error while writing");
|
|
}
|
|
sector_num += n1;
|
|
n -= n1;
|
|
buf1 += n1 * 512;
|
|
}
|
|
}
|
|
}
|
|
bdrv_delete(out_bs);
|
|
for (bs_i = 0; bs_i < bs_n; bs_i++)
|
|
bdrv_delete(bs[bs_i]);
|
|
free(bs);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef _WIN32
|
|
static int64_t get_allocated_file_size(const char *filename)
|
|
{
|
|
typedef DWORD (WINAPI * get_compressed_t)(const char *filename, DWORD *high);
|
|
get_compressed_t get_compressed;
|
|
struct _stati64 st;
|
|
|
|
/* WinNT support GetCompressedFileSize to determine allocate size */
|
|
get_compressed = (get_compressed_t) GetProcAddress(GetModuleHandle("kernel32"), "GetCompressedFileSizeA");
|
|
if (get_compressed) {
|
|
DWORD high, low;
|
|
low = get_compressed(filename, &high);
|
|
if (low != 0xFFFFFFFFlu || GetLastError() == NO_ERROR)
|
|
return (((int64_t) high) << 32) + low;
|
|
}
|
|
|
|
if (_stati64(filename, &st) < 0)
|
|
return -1;
|
|
return st.st_size;
|
|
}
|
|
#else
|
|
static int64_t get_allocated_file_size(const char *filename)
|
|
{
|
|
struct stat st;
|
|
if (stat(filename, &st) < 0)
|
|
return -1;
|
|
return (int64_t)st.st_blocks * 512;
|
|
}
|
|
#endif
|
|
|
|
static void dump_snapshots(BlockDriverState *bs)
|
|
{
|
|
QEMUSnapshotInfo *sn_tab, *sn;
|
|
int nb_sns, i;
|
|
char buf[256];
|
|
|
|
nb_sns = bdrv_snapshot_list(bs, &sn_tab);
|
|
if (nb_sns <= 0)
|
|
return;
|
|
printf("Snapshot list:\n");
|
|
printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL));
|
|
for(i = 0; i < nb_sns; i++) {
|
|
sn = &sn_tab[i];
|
|
printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn));
|
|
}
|
|
qemu_free(sn_tab);
|
|
}
|
|
|
|
static int img_info(int argc, char **argv)
|
|
{
|
|
int c;
|
|
const char *filename, *fmt;
|
|
BlockDriver *drv;
|
|
BlockDriverState *bs;
|
|
char fmt_name[128], size_buf[128], dsize_buf[128];
|
|
uint64_t total_sectors;
|
|
int64_t allocated_size;
|
|
char backing_filename[1024];
|
|
char backing_filename2[1024];
|
|
BlockDriverInfo bdi;
|
|
|
|
fmt = NULL;
|
|
for(;;) {
|
|
c = getopt(argc, argv, "f:h");
|
|
if (c == -1)
|
|
break;
|
|
switch(c) {
|
|
case 'h':
|
|
help();
|
|
break;
|
|
case 'f':
|
|
fmt = optarg;
|
|
break;
|
|
}
|
|
}
|
|
if (optind >= argc)
|
|
help();
|
|
filename = argv[optind++];
|
|
|
|
bs = bdrv_new("");
|
|
if (!bs)
|
|
error("Not enough memory");
|
|
if (fmt) {
|
|
drv = bdrv_find_format(fmt);
|
|
if (!drv)
|
|
error("Unknown file format '%s'", fmt);
|
|
} else {
|
|
drv = NULL;
|
|
}
|
|
if (bdrv_open2(bs, filename, BRDV_O_FLAGS, drv) < 0) {
|
|
error("Could not open '%s'", filename);
|
|
}
|
|
bdrv_get_format(bs, fmt_name, sizeof(fmt_name));
|
|
bdrv_get_geometry(bs, &total_sectors);
|
|
get_human_readable_size(size_buf, sizeof(size_buf), total_sectors * 512);
|
|
allocated_size = get_allocated_file_size(filename);
|
|
if (allocated_size < 0)
|
|
snprintf(dsize_buf, sizeof(dsize_buf), "unavailable");
|
|
else
|
|
get_human_readable_size(dsize_buf, sizeof(dsize_buf),
|
|
allocated_size);
|
|
printf("image: %s\n"
|
|
"file format: %s\n"
|
|
"virtual size: %s (%" PRId64 " bytes)\n"
|
|
"disk size: %s\n",
|
|
filename, fmt_name, size_buf,
|
|
(total_sectors * 512),
|
|
dsize_buf);
|
|
if (bdrv_is_encrypted(bs))
|
|
printf("encrypted: yes\n");
|
|
if (bdrv_get_info(bs, &bdi) >= 0) {
|
|
if (bdi.cluster_size != 0)
|
|
printf("cluster_size: %d\n", bdi.cluster_size);
|
|
}
|
|
bdrv_get_backing_filename(bs, backing_filename, sizeof(backing_filename));
|
|
if (backing_filename[0] != '\0') {
|
|
path_combine(backing_filename2, sizeof(backing_filename2),
|
|
filename, backing_filename);
|
|
printf("backing file: %s (actual path: %s)\n",
|
|
backing_filename,
|
|
backing_filename2);
|
|
}
|
|
dump_snapshots(bs);
|
|
bdrv_delete(bs);
|
|
return 0;
|
|
}
|
|
|
|
#define SNAPSHOT_LIST 1
|
|
#define SNAPSHOT_CREATE 2
|
|
#define SNAPSHOT_APPLY 3
|
|
#define SNAPSHOT_DELETE 4
|
|
|
|
static int img_snapshot(int argc, char **argv)
|
|
{
|
|
BlockDriverState *bs;
|
|
QEMUSnapshotInfo sn;
|
|
char *filename, *snapshot_name = NULL;
|
|
int c, ret;
|
|
int action = 0;
|
|
qemu_timeval tv;
|
|
|
|
/* Parse commandline parameters */
|
|
for(;;) {
|
|
c = getopt(argc, argv, "la:c:d:h");
|
|
if (c == -1)
|
|
break;
|
|
switch(c) {
|
|
case 'h':
|
|
help();
|
|
return 0;
|
|
case 'l':
|
|
if (action) {
|
|
help();
|
|
return 0;
|
|
}
|
|
action = SNAPSHOT_LIST;
|
|
break;
|
|
case 'a':
|
|
if (action) {
|
|
help();
|
|
return 0;
|
|
}
|
|
action = SNAPSHOT_APPLY;
|
|
snapshot_name = optarg;
|
|
break;
|
|
case 'c':
|
|
if (action) {
|
|
help();
|
|
return 0;
|
|
}
|
|
action = SNAPSHOT_CREATE;
|
|
snapshot_name = optarg;
|
|
break;
|
|
case 'd':
|
|
if (action) {
|
|
help();
|
|
return 0;
|
|
}
|
|
action = SNAPSHOT_DELETE;
|
|
snapshot_name = optarg;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (optind >= argc)
|
|
help();
|
|
filename = argv[optind++];
|
|
|
|
/* Open the image */
|
|
bs = bdrv_new("");
|
|
if (!bs)
|
|
error("Not enough memory");
|
|
|
|
if (bdrv_open2(bs, filename, 0, NULL) < 0) {
|
|
error("Could not open '%s'", filename);
|
|
}
|
|
|
|
/* Perform the requested action */
|
|
switch(action) {
|
|
case SNAPSHOT_LIST:
|
|
dump_snapshots(bs);
|
|
break;
|
|
|
|
case SNAPSHOT_CREATE:
|
|
memset(&sn, 0, sizeof(sn));
|
|
pstrcpy(sn.name, sizeof(sn.name), snapshot_name);
|
|
|
|
qemu_gettimeofday(&tv);
|
|
sn.date_sec = tv.tv_sec;
|
|
sn.date_nsec = tv.tv_usec * 1000;
|
|
|
|
ret = bdrv_snapshot_create(bs, &sn);
|
|
if (ret)
|
|
error("Could not create snapshot '%s': %d (%s)",
|
|
snapshot_name, ret, strerror(-ret));
|
|
break;
|
|
|
|
case SNAPSHOT_APPLY:
|
|
ret = bdrv_snapshot_goto(bs, snapshot_name);
|
|
if (ret)
|
|
error("Could not apply snapshot '%s': %d (%s)",
|
|
snapshot_name, ret, strerror(-ret));
|
|
break;
|
|
|
|
case SNAPSHOT_DELETE:
|
|
ret = bdrv_snapshot_delete(bs, snapshot_name);
|
|
if (ret)
|
|
error("Could not delete snapshot '%s': %d (%s)",
|
|
snapshot_name, ret, strerror(-ret));
|
|
break;
|
|
}
|
|
|
|
/* Cleanup */
|
|
bdrv_delete(bs);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const img_cmd_t img_cmds[] = {
|
|
#define DEF(option, callback, arg_string) \
|
|
{ option, callback },
|
|
#include "qemu-img-cmds.h"
|
|
#undef DEF
|
|
#undef GEN_DOCS
|
|
{ NULL, NULL, },
|
|
};
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
const img_cmd_t *cmd;
|
|
const char *cmdname;
|
|
|
|
bdrv_init();
|
|
if (argc < 2)
|
|
help();
|
|
cmdname = argv[1];
|
|
argc--; argv++;
|
|
|
|
/* find the command */
|
|
for(cmd = img_cmds; cmd->name != NULL; cmd++) {
|
|
if (!strcmp(cmdname, cmd->name)) {
|
|
return cmd->handler(argc, argv);
|
|
}
|
|
}
|
|
|
|
/* not found */
|
|
help();
|
|
return 0;
|
|
}
|