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/*
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* QEMU disk image utility
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu-common.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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/* 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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|
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static void format_print(void *opaque, const char *name) |
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{ |
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printf(" %s", name);
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} |
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|
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/* Please keep in synch with qemu-img.texi */
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static void help(void) |
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{ |
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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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" check [-f fmt] filename\n"
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" create [-e] [-6] [-F fmt] [-b base_image] [-f fmt] filename [size]\n"
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" commit [-f fmt] filename\n"
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" convert [-c] [-e] [-6] [-f fmt] [-O output_fmt] [-B output_base_image] filename [filename2 [...]] output_filename\n"
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" info [-f fmt] filename\n"
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" snapshot [-l | -a snapshot | -c snapshot | -d snapshot] filename\n"
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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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" 'base_image' is the read-only disk image which is used as base for a copy on\n"
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" write image; the copy on write image only stores the modified data\n"
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" 'output_base_image' forces the output image to be created as a copy on write\n"
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" image of the specified base image; 'output_base_image' should have the same\n"
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" content as the input's base image, however the path, image format, etc may\n"
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" differ\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 kilobytes. Optional suffixes\n"
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" 'M' (megabyte, 1024 * 1024) and 'G' (gigabyte, 1024 * 1024 * 1024) are\n"
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" supported any 'k' or 'K' 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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" '-c' indicates that target image must be compressed (qcow format only)\n"
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" '-e' indicates that the target image must be encrypted (qcow format only)\n"
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" '-6' indicates that the target image must use compatibility level 6 (vmdk 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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|
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static struct termios oldtty; |
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|
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static void term_exit(void) |
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{ |
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tcsetattr (0, TCSANOW, &oldtty);
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} |
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static void term_init(void) |
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{ |
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struct termios tty;
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|
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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); |
161 |
if (ret == -1) { |
162 |
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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|
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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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uint64_t size; |
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double sizef;
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const char *p; |
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BlockDriver *drv; |
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flags = 0;
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for(;;) {
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c = getopt(argc, argv, "F:b:f:he6");
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if (c == -1) |
233 |
break;
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switch(c) {
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case 'h': |
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help(); |
237 |
break;
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case 'F': |
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base_fmt = optarg; |
240 |
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; |
246 |
break;
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case 'e': |
248 |
flags |= BLOCK_FLAG_ENCRYPT; |
249 |
break;
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250 |
case '6': |
251 |
flags |= BLOCK_FLAG_COMPAT6; |
252 |
break;
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} |
254 |
} |
255 |
if (optind >= argc)
|
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help(); |
257 |
filename = argv[optind++]; |
258 |
size = 0;
|
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if (base_filename) {
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BlockDriverState *bs; |
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BlockDriver *base_drv = NULL;
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|
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if (base_fmt) {
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base_drv = bdrv_find_format(base_fmt); |
265 |
if (base_drv == NULL) |
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error("Unknown basefile format '%s'", base_fmt);
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} |
268 |
|
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bs = bdrv_new_open(base_filename, base_fmt); |
270 |
bdrv_get_geometry(bs, &size); |
271 |
size *= 512;
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bdrv_delete(bs); |
273 |
} else {
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if (optind >= argc)
|
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help(); |
276 |
p = argv[optind]; |
277 |
sizef = strtod(p, (char **)&p);
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if (*p == 'M') { |
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size = (uint64_t)(sizef * 1024 * 1024); |
280 |
} else if (*p == 'G') { |
281 |
size = (uint64_t)(sizef * 1024 * 1024 * 1024); |
282 |
} else if (*p == 'k' || *p == 'K' || *p == '\0') { |
283 |
size = (uint64_t)(sizef * 1024);
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} else {
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help(); |
286 |
} |
287 |
} |
288 |
drv = bdrv_find_format(fmt); |
289 |
if (!drv)
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error("Unknown file format '%s'", fmt);
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printf("Formatting '%s', fmt=%s",
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filename, fmt); |
293 |
if (flags & BLOCK_FLAG_ENCRYPT)
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printf(", encrypted");
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if (flags & BLOCK_FLAG_COMPAT6)
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printf(", compatibility level=6");
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if (base_filename) {
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printf(", backing_file=%s",
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base_filename); |
300 |
if (base_fmt)
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printf(", backing_fmt=%s",
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base_fmt); |
303 |
} |
304 |
printf(", size=%" PRIu64 " kB\n", size / 1024); |
305 |
ret = bdrv_create2(drv, filename, size / 512, base_filename, base_fmt, flags);
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306 |
if (ret < 0) { |
307 |
if (ret == -ENOTSUP) {
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308 |
error("Formatting or formatting option not supported for file format '%s'", fmt);
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} else if (ret == -EFBIG) { |
310 |
error("The image size is too large for file format '%s'", fmt);
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311 |
} else {
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312 |
error("Error while formatting");
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313 |
} |
314 |
} |
315 |
return 0; |
316 |
} |
317 |
|
318 |
static int img_check(int argc, char **argv) |
319 |
{ |
320 |
int c, ret;
|
321 |
const char *filename, *fmt; |
322 |
BlockDriver *drv; |
323 |
BlockDriverState *bs; |
324 |
|
325 |
fmt = NULL;
|
326 |
for(;;) {
|
327 |
c = getopt(argc, argv, "f:h");
|
328 |
if (c == -1) |
329 |
break;
|
330 |
switch(c) {
|
331 |
case 'h': |
332 |
help(); |
333 |
break;
|
334 |
case 'f': |
335 |
fmt = optarg; |
336 |
break;
|
337 |
} |
338 |
} |
339 |
if (optind >= argc)
|
340 |
help(); |
341 |
filename = argv[optind++]; |
342 |
|
343 |
bs = bdrv_new("");
|
344 |
if (!bs)
|
345 |
error("Not enough memory");
|
346 |
if (fmt) {
|
347 |
drv = bdrv_find_format(fmt); |
348 |
if (!drv)
|
349 |
error("Unknown file format '%s'", fmt);
|
350 |
} else {
|
351 |
drv = NULL;
|
352 |
} |
353 |
if (bdrv_open2(bs, filename, BRDV_O_FLAGS, drv) < 0) { |
354 |
error("Could not open '%s'", filename);
|
355 |
} |
356 |
ret = bdrv_check(bs); |
357 |
switch(ret) {
|
358 |
case 0: |
359 |
printf("No errors were found on the image.\n");
|
360 |
break;
|
361 |
case -ENOTSUP:
|
362 |
error("This image format does not support checks");
|
363 |
break;
|
364 |
default:
|
365 |
if (ret < 0) { |
366 |
error("An error occurred during the check");
|
367 |
} else {
|
368 |
printf("%d errors were found on the image.\n", ret);
|
369 |
} |
370 |
break;
|
371 |
} |
372 |
|
373 |
bdrv_delete(bs); |
374 |
return 0; |
375 |
} |
376 |
|
377 |
static int img_commit(int argc, char **argv) |
378 |
{ |
379 |
int c, ret;
|
380 |
const char *filename, *fmt; |
381 |
BlockDriver *drv; |
382 |
BlockDriverState *bs; |
383 |
|
384 |
fmt = NULL;
|
385 |
for(;;) {
|
386 |
c = getopt(argc, argv, "f:h");
|
387 |
if (c == -1) |
388 |
break;
|
389 |
switch(c) {
|
390 |
case 'h': |
391 |
help(); |
392 |
break;
|
393 |
case 'f': |
394 |
fmt = optarg; |
395 |
break;
|
396 |
} |
397 |
} |
398 |
if (optind >= argc)
|
399 |
help(); |
400 |
filename = argv[optind++]; |
401 |
|
402 |
bs = bdrv_new("");
|
403 |
if (!bs)
|
404 |
error("Not enough memory");
|
405 |
if (fmt) {
|
406 |
drv = bdrv_find_format(fmt); |
407 |
if (!drv)
|
408 |
error("Unknown file format '%s'", fmt);
|
409 |
} else {
|
410 |
drv = NULL;
|
411 |
} |
412 |
if (bdrv_open2(bs, filename, BRDV_O_FLAGS, drv) < 0) { |
413 |
error("Could not open '%s'", filename);
|
414 |
} |
415 |
ret = bdrv_commit(bs); |
416 |
switch(ret) {
|
417 |
case 0: |
418 |
printf("Image committed.\n");
|
419 |
break;
|
420 |
case -ENOENT:
|
421 |
error("No disk inserted");
|
422 |
break;
|
423 |
case -EACCES:
|
424 |
error("Image is read-only");
|
425 |
break;
|
426 |
case -ENOTSUP:
|
427 |
error("Image is already committed");
|
428 |
break;
|
429 |
default:
|
430 |
error("Error while committing image");
|
431 |
break;
|
432 |
} |
433 |
|
434 |
bdrv_delete(bs); |
435 |
return 0; |
436 |
} |
437 |
|
438 |
static int is_not_zero(const uint8_t *sector, int len) |
439 |
{ |
440 |
int i;
|
441 |
len >>= 2;
|
442 |
for(i = 0;i < len; i++) { |
443 |
if (((uint32_t *)sector)[i] != 0) |
444 |
return 1; |
445 |
} |
446 |
return 0; |
447 |
} |
448 |
|
449 |
/*
|
450 |
* Returns true iff the first sector pointed to by 'buf' contains at least
|
451 |
* a non-NUL byte.
|
452 |
*
|
453 |
* 'pnum' is set to the number of sectors (including and immediately following
|
454 |
* the first one) that are known to be in the same allocated/unallocated state.
|
455 |
*/
|
456 |
static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) |
457 |
{ |
458 |
int v, i;
|
459 |
|
460 |
if (n <= 0) { |
461 |
*pnum = 0;
|
462 |
return 0; |
463 |
} |
464 |
v = is_not_zero(buf, 512);
|
465 |
for(i = 1; i < n; i++) { |
466 |
buf += 512;
|
467 |
if (v != is_not_zero(buf, 512)) |
468 |
break;
|
469 |
} |
470 |
*pnum = i; |
471 |
return v;
|
472 |
} |
473 |
|
474 |
#define IO_BUF_SIZE 65536 |
475 |
|
476 |
static int img_convert(int argc, char **argv) |
477 |
{ |
478 |
int c, ret, n, n1, bs_n, bs_i, flags, cluster_size, cluster_sectors;
|
479 |
const char *fmt, *out_fmt, *out_baseimg, *out_filename; |
480 |
BlockDriver *drv; |
481 |
BlockDriverState **bs, *out_bs; |
482 |
int64_t total_sectors, nb_sectors, sector_num, bs_offset; |
483 |
uint64_t bs_sectors; |
484 |
uint8_t buf[IO_BUF_SIZE]; |
485 |
const uint8_t *buf1;
|
486 |
BlockDriverInfo bdi; |
487 |
|
488 |
fmt = NULL;
|
489 |
out_fmt = "raw";
|
490 |
out_baseimg = NULL;
|
491 |
flags = 0;
|
492 |
for(;;) {
|
493 |
c = getopt(argc, argv, "f:O:B:hce6");
|
494 |
if (c == -1) |
495 |
break;
|
496 |
switch(c) {
|
497 |
case 'h': |
498 |
help(); |
499 |
break;
|
500 |
case 'f': |
501 |
fmt = optarg; |
502 |
break;
|
503 |
case 'O': |
504 |
out_fmt = optarg; |
505 |
break;
|
506 |
case 'B': |
507 |
out_baseimg = optarg; |
508 |
break;
|
509 |
case 'c': |
510 |
flags |= BLOCK_FLAG_COMPRESS; |
511 |
break;
|
512 |
case 'e': |
513 |
flags |= BLOCK_FLAG_ENCRYPT; |
514 |
break;
|
515 |
case '6': |
516 |
flags |= BLOCK_FLAG_COMPAT6; |
517 |
break;
|
518 |
} |
519 |
} |
520 |
|
521 |
bs_n = argc - optind - 1;
|
522 |
if (bs_n < 1) help(); |
523 |
|
524 |
out_filename = argv[argc - 1];
|
525 |
|
526 |
if (bs_n > 1 && out_baseimg) |
527 |
error("-B makes no sense when concatenating multiple input images");
|
528 |
|
529 |
bs = calloc(bs_n, sizeof(BlockDriverState *));
|
530 |
if (!bs)
|
531 |
error("Out of memory");
|
532 |
|
533 |
total_sectors = 0;
|
534 |
for (bs_i = 0; bs_i < bs_n; bs_i++) { |
535 |
bs[bs_i] = bdrv_new_open(argv[optind + bs_i], fmt); |
536 |
if (!bs[bs_i])
|
537 |
error("Could not open '%s'", argv[optind + bs_i]);
|
538 |
bdrv_get_geometry(bs[bs_i], &bs_sectors); |
539 |
total_sectors += bs_sectors; |
540 |
} |
541 |
|
542 |
drv = bdrv_find_format(out_fmt); |
543 |
if (!drv)
|
544 |
error("Unknown file format '%s'", out_fmt);
|
545 |
if (flags & BLOCK_FLAG_COMPRESS && strcmp(drv->format_name, "qcow") && strcmp(drv->format_name, "qcow2")) |
546 |
error("Compression not supported for this file format");
|
547 |
if (flags & BLOCK_FLAG_ENCRYPT && strcmp(drv->format_name, "qcow") && strcmp(drv->format_name, "qcow2")) |
548 |
error("Encryption not supported for this file format");
|
549 |
if (flags & BLOCK_FLAG_COMPAT6 && strcmp(drv->format_name, "vmdk")) |
550 |
error("Alternative compatibility level not supported for this file format");
|
551 |
if (flags & BLOCK_FLAG_ENCRYPT && flags & BLOCK_FLAG_COMPRESS)
|
552 |
error("Compression and encryption not supported at the same time");
|
553 |
|
554 |
ret = bdrv_create(drv, out_filename, total_sectors, out_baseimg, flags); |
555 |
if (ret < 0) { |
556 |
if (ret == -ENOTSUP) {
|
557 |
error("Formatting not supported for file format '%s'", out_fmt);
|
558 |
} else if (ret == -EFBIG) { |
559 |
error("The image size is too large for file format '%s'", out_fmt);
|
560 |
} else {
|
561 |
error("Error while formatting '%s'", out_filename);
|
562 |
} |
563 |
} |
564 |
|
565 |
out_bs = bdrv_new_open(out_filename, out_fmt); |
566 |
|
567 |
bs_i = 0;
|
568 |
bs_offset = 0;
|
569 |
bdrv_get_geometry(bs[0], &bs_sectors);
|
570 |
|
571 |
if (flags & BLOCK_FLAG_COMPRESS) {
|
572 |
if (bdrv_get_info(out_bs, &bdi) < 0) |
573 |
error("could not get block driver info");
|
574 |
cluster_size = bdi.cluster_size; |
575 |
if (cluster_size <= 0 || cluster_size > IO_BUF_SIZE) |
576 |
error("invalid cluster size");
|
577 |
cluster_sectors = cluster_size >> 9;
|
578 |
sector_num = 0;
|
579 |
for(;;) {
|
580 |
int64_t bs_num; |
581 |
int remainder;
|
582 |
uint8_t *buf2; |
583 |
|
584 |
nb_sectors = total_sectors - sector_num; |
585 |
if (nb_sectors <= 0) |
586 |
break;
|
587 |
if (nb_sectors >= cluster_sectors)
|
588 |
n = cluster_sectors; |
589 |
else
|
590 |
n = nb_sectors; |
591 |
|
592 |
bs_num = sector_num - bs_offset; |
593 |
assert (bs_num >= 0);
|
594 |
remainder = n; |
595 |
buf2 = buf; |
596 |
while (remainder > 0) { |
597 |
int nlow;
|
598 |
while (bs_num == bs_sectors) {
|
599 |
bs_i++; |
600 |
assert (bs_i < bs_n); |
601 |
bs_offset += bs_sectors; |
602 |
bdrv_get_geometry(bs[bs_i], &bs_sectors); |
603 |
bs_num = 0;
|
604 |
/* printf("changing part: sector_num=%lld, "
|
605 |
"bs_i=%d, bs_offset=%lld, bs_sectors=%lld\n",
|
606 |
sector_num, bs_i, bs_offset, bs_sectors); */
|
607 |
} |
608 |
assert (bs_num < bs_sectors); |
609 |
|
610 |
nlow = (remainder > bs_sectors - bs_num) ? bs_sectors - bs_num : remainder; |
611 |
|
612 |
if (bdrv_read(bs[bs_i], bs_num, buf2, nlow) < 0) |
613 |
error("error while reading");
|
614 |
|
615 |
buf2 += nlow * 512;
|
616 |
bs_num += nlow; |
617 |
|
618 |
remainder -= nlow; |
619 |
} |
620 |
assert (remainder == 0);
|
621 |
|
622 |
if (n < cluster_sectors)
|
623 |
memset(buf + n * 512, 0, cluster_size - n * 512); |
624 |
if (is_not_zero(buf, cluster_size)) {
|
625 |
if (bdrv_write_compressed(out_bs, sector_num, buf,
|
626 |
cluster_sectors) != 0)
|
627 |
error("error while compressing sector %" PRId64,
|
628 |
sector_num); |
629 |
} |
630 |
sector_num += n; |
631 |
} |
632 |
/* signal EOF to align */
|
633 |
bdrv_write_compressed(out_bs, 0, NULL, 0); |
634 |
} else {
|
635 |
sector_num = 0; // total number of sectors converted so far |
636 |
for(;;) {
|
637 |
nb_sectors = total_sectors - sector_num; |
638 |
if (nb_sectors <= 0) |
639 |
break;
|
640 |
if (nb_sectors >= (IO_BUF_SIZE / 512)) |
641 |
n = (IO_BUF_SIZE / 512);
|
642 |
else
|
643 |
n = nb_sectors; |
644 |
|
645 |
while (sector_num - bs_offset >= bs_sectors) {
|
646 |
bs_i ++; |
647 |
assert (bs_i < bs_n); |
648 |
bs_offset += bs_sectors; |
649 |
bdrv_get_geometry(bs[bs_i], &bs_sectors); |
650 |
/* printf("changing part: sector_num=%lld, bs_i=%d, "
|
651 |
"bs_offset=%lld, bs_sectors=%lld\n",
|
652 |
sector_num, bs_i, bs_offset, bs_sectors); */
|
653 |
} |
654 |
|
655 |
if (n > bs_offset + bs_sectors - sector_num)
|
656 |
n = bs_offset + bs_sectors - sector_num; |
657 |
|
658 |
if (strcmp(drv->format_name, "host_device")) { |
659 |
if (!bdrv_is_allocated(bs[bs_i], sector_num - bs_offset,
|
660 |
n, &n1)) { |
661 |
sector_num += n1; |
662 |
continue;
|
663 |
} |
664 |
/* The next 'n1' sectors are allocated in the input image. Copy
|
665 |
only those as they may be followed by unallocated sectors. */
|
666 |
n = n1; |
667 |
} else {
|
668 |
n1 = n; |
669 |
} |
670 |
|
671 |
if (bdrv_read(bs[bs_i], sector_num - bs_offset, buf, n) < 0) |
672 |
error("error while reading");
|
673 |
/* NOTE: at the same time we convert, we do not write zero
|
674 |
sectors to have a chance to compress the image. Ideally, we
|
675 |
should add a specific call to have the info to go faster */
|
676 |
buf1 = buf; |
677 |
while (n > 0) { |
678 |
/* If the output image is being created as a copy on write image,
|
679 |
copy all sectors even the ones containing only NUL bytes,
|
680 |
because they may differ from the sectors in the base image.
|
681 |
|
682 |
If the output is to a host device, we also write out
|
683 |
sectors that are entirely 0, since whatever data was
|
684 |
already there is garbage, not 0s. */
|
685 |
if (strcmp(drv->format_name, "host_device") == 0 || out_baseimg || |
686 |
is_allocated_sectors(buf1, n, &n1)) { |
687 |
if (bdrv_write(out_bs, sector_num, buf1, n1) < 0) |
688 |
error("error while writing");
|
689 |
} |
690 |
sector_num += n1; |
691 |
n -= n1; |
692 |
buf1 += n1 * 512;
|
693 |
} |
694 |
} |
695 |
} |
696 |
bdrv_delete(out_bs); |
697 |
for (bs_i = 0; bs_i < bs_n; bs_i++) |
698 |
bdrv_delete(bs[bs_i]); |
699 |
free(bs); |
700 |
return 0; |
701 |
} |
702 |
|
703 |
#ifdef _WIN32
|
704 |
static int64_t get_allocated_file_size(const char *filename) |
705 |
{ |
706 |
typedef DWORD (WINAPI * get_compressed_t)(const char *filename, DWORD *high); |
707 |
get_compressed_t get_compressed; |
708 |
struct _stati64 st;
|
709 |
|
710 |
/* WinNT support GetCompressedFileSize to determine allocate size */
|
711 |
get_compressed = (get_compressed_t) GetProcAddress(GetModuleHandle("kernel32"), "GetCompressedFileSizeA"); |
712 |
if (get_compressed) {
|
713 |
DWORD high, low; |
714 |
low = get_compressed(filename, &high); |
715 |
if (low != 0xFFFFFFFFlu || GetLastError() == NO_ERROR) |
716 |
return (((int64_t) high) << 32) + low; |
717 |
} |
718 |
|
719 |
if (_stati64(filename, &st) < 0) |
720 |
return -1; |
721 |
return st.st_size;
|
722 |
} |
723 |
#else
|
724 |
static int64_t get_allocated_file_size(const char *filename) |
725 |
{ |
726 |
struct stat st;
|
727 |
if (stat(filename, &st) < 0) |
728 |
return -1; |
729 |
return (int64_t)st.st_blocks * 512; |
730 |
} |
731 |
#endif
|
732 |
|
733 |
static void dump_snapshots(BlockDriverState *bs) |
734 |
{ |
735 |
QEMUSnapshotInfo *sn_tab, *sn; |
736 |
int nb_sns, i;
|
737 |
char buf[256]; |
738 |
|
739 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
740 |
if (nb_sns <= 0) |
741 |
return;
|
742 |
printf("Snapshot list:\n");
|
743 |
printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
744 |
for(i = 0; i < nb_sns; i++) { |
745 |
sn = &sn_tab[i]; |
746 |
printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
747 |
} |
748 |
qemu_free(sn_tab); |
749 |
} |
750 |
|
751 |
static int img_info(int argc, char **argv) |
752 |
{ |
753 |
int c;
|
754 |
const char *filename, *fmt; |
755 |
BlockDriver *drv; |
756 |
BlockDriverState *bs; |
757 |
char fmt_name[128], size_buf[128], dsize_buf[128]; |
758 |
uint64_t total_sectors; |
759 |
int64_t allocated_size; |
760 |
char backing_filename[1024]; |
761 |
char backing_filename2[1024]; |
762 |
BlockDriverInfo bdi; |
763 |
|
764 |
fmt = NULL;
|
765 |
for(;;) {
|
766 |
c = getopt(argc, argv, "f:h");
|
767 |
if (c == -1) |
768 |
break;
|
769 |
switch(c) {
|
770 |
case 'h': |
771 |
help(); |
772 |
break;
|
773 |
case 'f': |
774 |
fmt = optarg; |
775 |
break;
|
776 |
} |
777 |
} |
778 |
if (optind >= argc)
|
779 |
help(); |
780 |
filename = argv[optind++]; |
781 |
|
782 |
bs = bdrv_new("");
|
783 |
if (!bs)
|
784 |
error("Not enough memory");
|
785 |
if (fmt) {
|
786 |
drv = bdrv_find_format(fmt); |
787 |
if (!drv)
|
788 |
error("Unknown file format '%s'", fmt);
|
789 |
} else {
|
790 |
drv = NULL;
|
791 |
} |
792 |
if (bdrv_open2(bs, filename, BRDV_O_FLAGS, drv) < 0) { |
793 |
error("Could not open '%s'", filename);
|
794 |
} |
795 |
bdrv_get_format(bs, fmt_name, sizeof(fmt_name));
|
796 |
bdrv_get_geometry(bs, &total_sectors); |
797 |
get_human_readable_size(size_buf, sizeof(size_buf), total_sectors * 512); |
798 |
allocated_size = get_allocated_file_size(filename); |
799 |
if (allocated_size < 0) |
800 |
snprintf(dsize_buf, sizeof(dsize_buf), "unavailable"); |
801 |
else
|
802 |
get_human_readable_size(dsize_buf, sizeof(dsize_buf),
|
803 |
allocated_size); |
804 |
printf("image: %s\n"
|
805 |
"file format: %s\n"
|
806 |
"virtual size: %s (%" PRId64 " bytes)\n" |
807 |
"disk size: %s\n",
|
808 |
filename, fmt_name, size_buf, |
809 |
(total_sectors * 512),
|
810 |
dsize_buf); |
811 |
if (bdrv_is_encrypted(bs))
|
812 |
printf("encrypted: yes\n");
|
813 |
if (bdrv_get_info(bs, &bdi) >= 0) { |
814 |
if (bdi.cluster_size != 0) |
815 |
printf("cluster_size: %d\n", bdi.cluster_size);
|
816 |
} |
817 |
bdrv_get_backing_filename(bs, backing_filename, sizeof(backing_filename));
|
818 |
if (backing_filename[0] != '\0') { |
819 |
path_combine(backing_filename2, sizeof(backing_filename2),
|
820 |
filename, backing_filename); |
821 |
printf("backing file: %s (actual path: %s)\n",
|
822 |
backing_filename, |
823 |
backing_filename2); |
824 |
} |
825 |
dump_snapshots(bs); |
826 |
bdrv_delete(bs); |
827 |
return 0; |
828 |
} |
829 |
|
830 |
#define SNAPSHOT_LIST 1 |
831 |
#define SNAPSHOT_CREATE 2 |
832 |
#define SNAPSHOT_APPLY 3 |
833 |
#define SNAPSHOT_DELETE 4 |
834 |
|
835 |
static void img_snapshot(int argc, char **argv) |
836 |
{ |
837 |
BlockDriverState *bs; |
838 |
QEMUSnapshotInfo sn; |
839 |
char *filename, *snapshot_name = NULL; |
840 |
int c, ret;
|
841 |
int action = 0; |
842 |
qemu_timeval tv; |
843 |
|
844 |
/* Parse commandline parameters */
|
845 |
for(;;) {
|
846 |
c = getopt(argc, argv, "la:c:d:h");
|
847 |
if (c == -1) |
848 |
break;
|
849 |
switch(c) {
|
850 |
case 'h': |
851 |
help(); |
852 |
return;
|
853 |
case 'l': |
854 |
if (action) {
|
855 |
help(); |
856 |
return;
|
857 |
} |
858 |
action = SNAPSHOT_LIST; |
859 |
break;
|
860 |
case 'a': |
861 |
if (action) {
|
862 |
help(); |
863 |
return;
|
864 |
} |
865 |
action = SNAPSHOT_APPLY; |
866 |
snapshot_name = optarg; |
867 |
break;
|
868 |
case 'c': |
869 |
if (action) {
|
870 |
help(); |
871 |
return;
|
872 |
} |
873 |
action = SNAPSHOT_CREATE; |
874 |
snapshot_name = optarg; |
875 |
break;
|
876 |
case 'd': |
877 |
if (action) {
|
878 |
help(); |
879 |
return;
|
880 |
} |
881 |
action = SNAPSHOT_DELETE; |
882 |
snapshot_name = optarg; |
883 |
break;
|
884 |
} |
885 |
} |
886 |
|
887 |
if (optind >= argc)
|
888 |
help(); |
889 |
filename = argv[optind++]; |
890 |
|
891 |
/* Open the image */
|
892 |
bs = bdrv_new("");
|
893 |
if (!bs)
|
894 |
error("Not enough memory");
|
895 |
|
896 |
if (bdrv_open2(bs, filename, 0, NULL) < 0) { |
897 |
error("Could not open '%s'", filename);
|
898 |
} |
899 |
|
900 |
/* Perform the requested action */
|
901 |
switch(action) {
|
902 |
case SNAPSHOT_LIST:
|
903 |
dump_snapshots(bs); |
904 |
break;
|
905 |
|
906 |
case SNAPSHOT_CREATE:
|
907 |
memset(&sn, 0, sizeof(sn)); |
908 |
pstrcpy(sn.name, sizeof(sn.name), snapshot_name);
|
909 |
|
910 |
qemu_gettimeofday(&tv); |
911 |
sn.date_sec = tv.tv_sec; |
912 |
sn.date_nsec = tv.tv_usec * 1000;
|
913 |
|
914 |
ret = bdrv_snapshot_create(bs, &sn); |
915 |
if (ret)
|
916 |
error("Could not create snapshot '%s': %d (%s)",
|
917 |
snapshot_name, ret, strerror(-ret)); |
918 |
break;
|
919 |
|
920 |
case SNAPSHOT_APPLY:
|
921 |
ret = bdrv_snapshot_goto(bs, snapshot_name); |
922 |
if (ret)
|
923 |
error("Could not apply snapshot '%s': %d (%s)",
|
924 |
snapshot_name, ret, strerror(-ret)); |
925 |
break;
|
926 |
|
927 |
case SNAPSHOT_DELETE:
|
928 |
ret = bdrv_snapshot_delete(bs, snapshot_name); |
929 |
if (ret)
|
930 |
error("Could not delete snapshot '%s': %d (%s)",
|
931 |
snapshot_name, ret, strerror(-ret)); |
932 |
break;
|
933 |
} |
934 |
|
935 |
/* Cleanup */
|
936 |
bdrv_delete(bs); |
937 |
} |
938 |
|
939 |
int main(int argc, char **argv) |
940 |
{ |
941 |
const char *cmd; |
942 |
|
943 |
bdrv_init(); |
944 |
if (argc < 2) |
945 |
help(); |
946 |
cmd = argv[1];
|
947 |
argc--; argv++; |
948 |
if (!strcmp(cmd, "create")) { |
949 |
img_create(argc, argv); |
950 |
} else if (!strcmp(cmd, "check")) { |
951 |
img_check(argc, argv); |
952 |
} else if (!strcmp(cmd, "commit")) { |
953 |
img_commit(argc, argv); |
954 |
} else if (!strcmp(cmd, "convert")) { |
955 |
img_convert(argc, argv); |
956 |
} else if (!strcmp(cmd, "info")) { |
957 |
img_info(argc, argv); |
958 |
} else if (!strcmp(cmd, "snapshot")) { |
959 |
img_snapshot(argc, argv); |
960 |
} else {
|
961 |
help(); |
962 |
} |
963 |
return 0; |
964 |
} |