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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 "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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|
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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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|
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#else
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|
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#include <termios.h> |
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|
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static struct termios oldtty; |
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|
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static void term_exit(void) |
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{ |
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tcsetattr (0, TCSANOW, &oldtty);
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} |
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|
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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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|
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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); |
162 |
if (ret == -1) { |
163 |
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]; |
194 |
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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); |
200 |
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 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(); |
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': |
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flags |= BLOCK_FLAG_ENCRYPT; |
249 |
break;
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case '6': |
251 |
flags |= BLOCK_FLAG_COMPAT6; |
252 |
break;
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case 'o': |
254 |
options = optarg; |
255 |
break;
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} |
257 |
} |
258 |
if (optind >= argc)
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help(); |
260 |
filename = argv[optind++]; |
261 |
|
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/* Find driver and parse its options */
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drv = bdrv_find_format(fmt); |
264 |
if (!drv)
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error("Unknown file format '%s'", fmt);
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|
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if (options) {
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param = parse_option_parameters(options, drv->create_options, param); |
269 |
if (param == NULL) { |
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error("Invalid options for file format '%s'.", fmt);
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} |
272 |
} else {
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param = parse_option_parameters("", drv->create_options, param);
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} |
275 |
|
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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++]); |
279 |
} |
280 |
|
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/* Add old-style options to parameters */
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if (flags & BLOCK_FLAG_ENCRYPT) {
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if (set_option_parameter(param, BLOCK_OPT_ENCRYPT, "on")) { |
284 |
error("Encryption not supported for file format '%s'", fmt);
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} |
286 |
} |
287 |
if (flags & BLOCK_FLAG_COMPAT6) {
|
288 |
if (set_option_parameter(param, BLOCK_OPT_COMPAT6, "on")) { |
289 |
error("VMDK version 6 not supported for file format '%s'", fmt);
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} |
291 |
} |
292 |
|
293 |
if (base_filename) {
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294 |
if (set_option_parameter(param, BLOCK_OPT_BACKING_FILE, base_filename)) {
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error("Backing file not supported for file format '%s'", fmt);
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} |
297 |
} |
298 |
if (base_fmt) {
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299 |
if (set_option_parameter(param, BLOCK_OPT_BACKING_FMT, base_fmt)) {
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300 |
error("Backing file format not supported for file format '%s'", fmt);
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} |
302 |
} |
303 |
|
304 |
// The size for the image must always be specified, with one exception:
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305 |
// If we are using a backing file, we can obtain the size from there
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306 |
if (get_option_parameter(param, BLOCK_OPT_SIZE)->value.n == 0) { |
307 |
|
308 |
QEMUOptionParameter *backing_file = |
309 |
get_option_parameter(param, BLOCK_OPT_BACKING_FILE); |
310 |
QEMUOptionParameter *backing_fmt = |
311 |
get_option_parameter(param, BLOCK_OPT_BACKING_FMT); |
312 |
|
313 |
if (backing_file && backing_file->value.s) {
|
314 |
BlockDriverState *bs; |
315 |
uint64_t size; |
316 |
const char *fmt = NULL; |
317 |
char buf[32]; |
318 |
|
319 |
if (backing_fmt && backing_fmt->value.s) {
|
320 |
if (bdrv_find_format(backing_fmt->value.s)) {
|
321 |
fmt = backing_fmt->value.s; |
322 |
} else {
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323 |
error("Unknown backing file format '%s'",
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324 |
backing_fmt->value.s); |
325 |
} |
326 |
} |
327 |
|
328 |
bs = bdrv_new_open(backing_file->value.s, fmt); |
329 |
bdrv_get_geometry(bs, &size); |
330 |
size *= 512;
|
331 |
bdrv_delete(bs); |
332 |
|
333 |
snprintf(buf, sizeof(buf), "%" PRId64, size); |
334 |
set_option_parameter(param, BLOCK_OPT_SIZE, buf); |
335 |
} else {
|
336 |
error("Image creation needs a size parameter");
|
337 |
} |
338 |
} |
339 |
|
340 |
printf("Formatting '%s', fmt=%s ", filename, fmt);
|
341 |
print_option_parameters(param); |
342 |
puts("");
|
343 |
|
344 |
ret = bdrv_create(drv, filename, param); |
345 |
free_option_parameters(param); |
346 |
|
347 |
if (ret < 0) { |
348 |
if (ret == -ENOTSUP) {
|
349 |
error("Formatting or formatting option not supported for file format '%s'", fmt);
|
350 |
} else if (ret == -EFBIG) { |
351 |
error("The image size is too large for file format '%s'", fmt);
|
352 |
} else {
|
353 |
error("Error while formatting");
|
354 |
} |
355 |
} |
356 |
return 0; |
357 |
} |
358 |
|
359 |
static int img_check(int argc, char **argv) |
360 |
{ |
361 |
int c, ret;
|
362 |
const char *filename, *fmt; |
363 |
BlockDriver *drv; |
364 |
BlockDriverState *bs; |
365 |
|
366 |
fmt = NULL;
|
367 |
for(;;) {
|
368 |
c = getopt(argc, argv, "f:h");
|
369 |
if (c == -1) |
370 |
break;
|
371 |
switch(c) {
|
372 |
case 'h': |
373 |
help(); |
374 |
break;
|
375 |
case 'f': |
376 |
fmt = optarg; |
377 |
break;
|
378 |
} |
379 |
} |
380 |
if (optind >= argc)
|
381 |
help(); |
382 |
filename = argv[optind++]; |
383 |
|
384 |
bs = bdrv_new("");
|
385 |
if (!bs)
|
386 |
error("Not enough memory");
|
387 |
if (fmt) {
|
388 |
drv = bdrv_find_format(fmt); |
389 |
if (!drv)
|
390 |
error("Unknown file format '%s'", fmt);
|
391 |
} else {
|
392 |
drv = NULL;
|
393 |
} |
394 |
if (bdrv_open2(bs, filename, BRDV_O_FLAGS, drv) < 0) { |
395 |
error("Could not open '%s'", filename);
|
396 |
} |
397 |
ret = bdrv_check(bs); |
398 |
switch(ret) {
|
399 |
case 0: |
400 |
printf("No errors were found on the image.\n");
|
401 |
break;
|
402 |
case -ENOTSUP:
|
403 |
error("This image format does not support checks");
|
404 |
break;
|
405 |
default:
|
406 |
if (ret < 0) { |
407 |
error("An error occurred during the check");
|
408 |
} else {
|
409 |
printf("%d errors were found on the image.\n", ret);
|
410 |
} |
411 |
break;
|
412 |
} |
413 |
|
414 |
bdrv_delete(bs); |
415 |
return 0; |
416 |
} |
417 |
|
418 |
static int img_commit(int argc, char **argv) |
419 |
{ |
420 |
int c, ret;
|
421 |
const char *filename, *fmt; |
422 |
BlockDriver *drv; |
423 |
BlockDriverState *bs; |
424 |
|
425 |
fmt = NULL;
|
426 |
for(;;) {
|
427 |
c = getopt(argc, argv, "f:h");
|
428 |
if (c == -1) |
429 |
break;
|
430 |
switch(c) {
|
431 |
case 'h': |
432 |
help(); |
433 |
break;
|
434 |
case 'f': |
435 |
fmt = optarg; |
436 |
break;
|
437 |
} |
438 |
} |
439 |
if (optind >= argc)
|
440 |
help(); |
441 |
filename = argv[optind++]; |
442 |
|
443 |
bs = bdrv_new("");
|
444 |
if (!bs)
|
445 |
error("Not enough memory");
|
446 |
if (fmt) {
|
447 |
drv = bdrv_find_format(fmt); |
448 |
if (!drv)
|
449 |
error("Unknown file format '%s'", fmt);
|
450 |
} else {
|
451 |
drv = NULL;
|
452 |
} |
453 |
if (bdrv_open2(bs, filename, BRDV_O_FLAGS, drv) < 0) { |
454 |
error("Could not open '%s'", filename);
|
455 |
} |
456 |
ret = bdrv_commit(bs); |
457 |
switch(ret) {
|
458 |
case 0: |
459 |
printf("Image committed.\n");
|
460 |
break;
|
461 |
case -ENOENT:
|
462 |
error("No disk inserted");
|
463 |
break;
|
464 |
case -EACCES:
|
465 |
error("Image is read-only");
|
466 |
break;
|
467 |
case -ENOTSUP:
|
468 |
error("Image is already committed");
|
469 |
break;
|
470 |
default:
|
471 |
error("Error while committing image");
|
472 |
break;
|
473 |
} |
474 |
|
475 |
bdrv_delete(bs); |
476 |
return 0; |
477 |
} |
478 |
|
479 |
static int is_not_zero(const uint8_t *sector, int len) |
480 |
{ |
481 |
int i;
|
482 |
len >>= 2;
|
483 |
for(i = 0;i < len; i++) { |
484 |
if (((uint32_t *)sector)[i] != 0) |
485 |
return 1; |
486 |
} |
487 |
return 0; |
488 |
} |
489 |
|
490 |
/*
|
491 |
* Returns true iff the first sector pointed to by 'buf' contains at least
|
492 |
* a non-NUL byte.
|
493 |
*
|
494 |
* 'pnum' is set to the number of sectors (including and immediately following
|
495 |
* the first one) that are known to be in the same allocated/unallocated state.
|
496 |
*/
|
497 |
static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) |
498 |
{ |
499 |
int v, i;
|
500 |
|
501 |
if (n <= 0) { |
502 |
*pnum = 0;
|
503 |
return 0; |
504 |
} |
505 |
v = is_not_zero(buf, 512);
|
506 |
for(i = 1; i < n; i++) { |
507 |
buf += 512;
|
508 |
if (v != is_not_zero(buf, 512)) |
509 |
break;
|
510 |
} |
511 |
*pnum = i; |
512 |
return v;
|
513 |
} |
514 |
|
515 |
#define IO_BUF_SIZE 65536 |
516 |
|
517 |
static int img_convert(int argc, char **argv) |
518 |
{ |
519 |
int c, ret, n, n1, bs_n, bs_i, flags, cluster_size, cluster_sectors;
|
520 |
const char *fmt, *out_fmt, *out_baseimg, *out_filename; |
521 |
BlockDriver *drv; |
522 |
BlockDriverState **bs, *out_bs; |
523 |
int64_t total_sectors, nb_sectors, sector_num, bs_offset; |
524 |
uint64_t bs_sectors; |
525 |
uint8_t buf[IO_BUF_SIZE]; |
526 |
const uint8_t *buf1;
|
527 |
BlockDriverInfo bdi; |
528 |
|
529 |
fmt = NULL;
|
530 |
out_fmt = "raw";
|
531 |
out_baseimg = NULL;
|
532 |
flags = 0;
|
533 |
for(;;) {
|
534 |
c = getopt(argc, argv, "f:O:B:hce6");
|
535 |
if (c == -1) |
536 |
break;
|
537 |
switch(c) {
|
538 |
case 'h': |
539 |
help(); |
540 |
break;
|
541 |
case 'f': |
542 |
fmt = optarg; |
543 |
break;
|
544 |
case 'O': |
545 |
out_fmt = optarg; |
546 |
break;
|
547 |
case 'B': |
548 |
out_baseimg = optarg; |
549 |
break;
|
550 |
case 'c': |
551 |
flags |= BLOCK_FLAG_COMPRESS; |
552 |
break;
|
553 |
case 'e': |
554 |
flags |= BLOCK_FLAG_ENCRYPT; |
555 |
break;
|
556 |
case '6': |
557 |
flags |= BLOCK_FLAG_COMPAT6; |
558 |
break;
|
559 |
} |
560 |
} |
561 |
|
562 |
bs_n = argc - optind - 1;
|
563 |
if (bs_n < 1) help(); |
564 |
|
565 |
out_filename = argv[argc - 1];
|
566 |
|
567 |
if (bs_n > 1 && out_baseimg) |
568 |
error("-B makes no sense when concatenating multiple input images");
|
569 |
|
570 |
bs = calloc(bs_n, sizeof(BlockDriverState *));
|
571 |
if (!bs)
|
572 |
error("Out of memory");
|
573 |
|
574 |
total_sectors = 0;
|
575 |
for (bs_i = 0; bs_i < bs_n; bs_i++) { |
576 |
bs[bs_i] = bdrv_new_open(argv[optind + bs_i], fmt); |
577 |
if (!bs[bs_i])
|
578 |
error("Could not open '%s'", argv[optind + bs_i]);
|
579 |
bdrv_get_geometry(bs[bs_i], &bs_sectors); |
580 |
total_sectors += bs_sectors; |
581 |
} |
582 |
|
583 |
drv = bdrv_find_format(out_fmt); |
584 |
if (!drv)
|
585 |
error("Unknown file format '%s'", out_fmt);
|
586 |
if (flags & BLOCK_FLAG_COMPRESS && strcmp(drv->format_name, "qcow") && strcmp(drv->format_name, "qcow2")) |
587 |
error("Compression not supported for this file format");
|
588 |
if (flags & BLOCK_FLAG_ENCRYPT && strcmp(drv->format_name, "qcow") && strcmp(drv->format_name, "qcow2")) |
589 |
error("Encryption not supported for this file format");
|
590 |
if (flags & BLOCK_FLAG_COMPAT6 && strcmp(drv->format_name, "vmdk")) |
591 |
error("Alternative compatibility level not supported for this file format");
|
592 |
if (flags & BLOCK_FLAG_ENCRYPT && flags & BLOCK_FLAG_COMPRESS)
|
593 |
error("Compression and encryption not supported at the same time");
|
594 |
|
595 |
ret = bdrv_create2(drv, out_filename, total_sectors, out_baseimg, NULL, flags);
|
596 |
if (ret < 0) { |
597 |
if (ret == -ENOTSUP) {
|
598 |
error("Formatting not supported for file format '%s'", out_fmt);
|
599 |
} else if (ret == -EFBIG) { |
600 |
error("The image size is too large for file format '%s'", out_fmt);
|
601 |
} else {
|
602 |
error("Error while formatting '%s'", out_filename);
|
603 |
} |
604 |
} |
605 |
|
606 |
out_bs = bdrv_new_open(out_filename, out_fmt); |
607 |
|
608 |
bs_i = 0;
|
609 |
bs_offset = 0;
|
610 |
bdrv_get_geometry(bs[0], &bs_sectors);
|
611 |
|
612 |
if (flags & BLOCK_FLAG_COMPRESS) {
|
613 |
if (bdrv_get_info(out_bs, &bdi) < 0) |
614 |
error("could not get block driver info");
|
615 |
cluster_size = bdi.cluster_size; |
616 |
if (cluster_size <= 0 || cluster_size > IO_BUF_SIZE) |
617 |
error("invalid cluster size");
|
618 |
cluster_sectors = cluster_size >> 9;
|
619 |
sector_num = 0;
|
620 |
for(;;) {
|
621 |
int64_t bs_num; |
622 |
int remainder;
|
623 |
uint8_t *buf2; |
624 |
|
625 |
nb_sectors = total_sectors - sector_num; |
626 |
if (nb_sectors <= 0) |
627 |
break;
|
628 |
if (nb_sectors >= cluster_sectors)
|
629 |
n = cluster_sectors; |
630 |
else
|
631 |
n = nb_sectors; |
632 |
|
633 |
bs_num = sector_num - bs_offset; |
634 |
assert (bs_num >= 0);
|
635 |
remainder = n; |
636 |
buf2 = buf; |
637 |
while (remainder > 0) { |
638 |
int nlow;
|
639 |
while (bs_num == bs_sectors) {
|
640 |
bs_i++; |
641 |
assert (bs_i < bs_n); |
642 |
bs_offset += bs_sectors; |
643 |
bdrv_get_geometry(bs[bs_i], &bs_sectors); |
644 |
bs_num = 0;
|
645 |
/* printf("changing part: sector_num=%lld, "
|
646 |
"bs_i=%d, bs_offset=%lld, bs_sectors=%lld\n",
|
647 |
sector_num, bs_i, bs_offset, bs_sectors); */
|
648 |
} |
649 |
assert (bs_num < bs_sectors); |
650 |
|
651 |
nlow = (remainder > bs_sectors - bs_num) ? bs_sectors - bs_num : remainder; |
652 |
|
653 |
if (bdrv_read(bs[bs_i], bs_num, buf2, nlow) < 0) |
654 |
error("error while reading");
|
655 |
|
656 |
buf2 += nlow * 512;
|
657 |
bs_num += nlow; |
658 |
|
659 |
remainder -= nlow; |
660 |
} |
661 |
assert (remainder == 0);
|
662 |
|
663 |
if (n < cluster_sectors)
|
664 |
memset(buf + n * 512, 0, cluster_size - n * 512); |
665 |
if (is_not_zero(buf, cluster_size)) {
|
666 |
if (bdrv_write_compressed(out_bs, sector_num, buf,
|
667 |
cluster_sectors) != 0)
|
668 |
error("error while compressing sector %" PRId64,
|
669 |
sector_num); |
670 |
} |
671 |
sector_num += n; |
672 |
} |
673 |
/* signal EOF to align */
|
674 |
bdrv_write_compressed(out_bs, 0, NULL, 0); |
675 |
} else {
|
676 |
sector_num = 0; // total number of sectors converted so far |
677 |
for(;;) {
|
678 |
nb_sectors = total_sectors - sector_num; |
679 |
if (nb_sectors <= 0) |
680 |
break;
|
681 |
if (nb_sectors >= (IO_BUF_SIZE / 512)) |
682 |
n = (IO_BUF_SIZE / 512);
|
683 |
else
|
684 |
n = nb_sectors; |
685 |
|
686 |
while (sector_num - bs_offset >= bs_sectors) {
|
687 |
bs_i ++; |
688 |
assert (bs_i < bs_n); |
689 |
bs_offset += bs_sectors; |
690 |
bdrv_get_geometry(bs[bs_i], &bs_sectors); |
691 |
/* printf("changing part: sector_num=%lld, bs_i=%d, "
|
692 |
"bs_offset=%lld, bs_sectors=%lld\n",
|
693 |
sector_num, bs_i, bs_offset, bs_sectors); */
|
694 |
} |
695 |
|
696 |
if (n > bs_offset + bs_sectors - sector_num)
|
697 |
n = bs_offset + bs_sectors - sector_num; |
698 |
|
699 |
if (strcmp(drv->format_name, "host_device")) { |
700 |
if (!bdrv_is_allocated(bs[bs_i], sector_num - bs_offset,
|
701 |
n, &n1)) { |
702 |
sector_num += n1; |
703 |
continue;
|
704 |
} |
705 |
/* The next 'n1' sectors are allocated in the input image. Copy
|
706 |
only those as they may be followed by unallocated sectors. */
|
707 |
n = n1; |
708 |
} else {
|
709 |
n1 = n; |
710 |
} |
711 |
|
712 |
if (bdrv_read(bs[bs_i], sector_num - bs_offset, buf, n) < 0) |
713 |
error("error while reading");
|
714 |
/* NOTE: at the same time we convert, we do not write zero
|
715 |
sectors to have a chance to compress the image. Ideally, we
|
716 |
should add a specific call to have the info to go faster */
|
717 |
buf1 = buf; |
718 |
while (n > 0) { |
719 |
/* If the output image is being created as a copy on write image,
|
720 |
copy all sectors even the ones containing only NUL bytes,
|
721 |
because they may differ from the sectors in the base image.
|
722 |
|
723 |
If the output is to a host device, we also write out
|
724 |
sectors that are entirely 0, since whatever data was
|
725 |
already there is garbage, not 0s. */
|
726 |
if (strcmp(drv->format_name, "host_device") == 0 || out_baseimg || |
727 |
is_allocated_sectors(buf1, n, &n1)) { |
728 |
if (bdrv_write(out_bs, sector_num, buf1, n1) < 0) |
729 |
error("error while writing");
|
730 |
} |
731 |
sector_num += n1; |
732 |
n -= n1; |
733 |
buf1 += n1 * 512;
|
734 |
} |
735 |
} |
736 |
} |
737 |
bdrv_delete(out_bs); |
738 |
for (bs_i = 0; bs_i < bs_n; bs_i++) |
739 |
bdrv_delete(bs[bs_i]); |
740 |
free(bs); |
741 |
return 0; |
742 |
} |
743 |
|
744 |
#ifdef _WIN32
|
745 |
static int64_t get_allocated_file_size(const char *filename) |
746 |
{ |
747 |
typedef DWORD (WINAPI * get_compressed_t)(const char *filename, DWORD *high); |
748 |
get_compressed_t get_compressed; |
749 |
struct _stati64 st;
|
750 |
|
751 |
/* WinNT support GetCompressedFileSize to determine allocate size */
|
752 |
get_compressed = (get_compressed_t) GetProcAddress(GetModuleHandle("kernel32"), "GetCompressedFileSizeA"); |
753 |
if (get_compressed) {
|
754 |
DWORD high, low; |
755 |
low = get_compressed(filename, &high); |
756 |
if (low != 0xFFFFFFFFlu || GetLastError() == NO_ERROR) |
757 |
return (((int64_t) high) << 32) + low; |
758 |
} |
759 |
|
760 |
if (_stati64(filename, &st) < 0) |
761 |
return -1; |
762 |
return st.st_size;
|
763 |
} |
764 |
#else
|
765 |
static int64_t get_allocated_file_size(const char *filename) |
766 |
{ |
767 |
struct stat st;
|
768 |
if (stat(filename, &st) < 0) |
769 |
return -1; |
770 |
return (int64_t)st.st_blocks * 512; |
771 |
} |
772 |
#endif
|
773 |
|
774 |
static void dump_snapshots(BlockDriverState *bs) |
775 |
{ |
776 |
QEMUSnapshotInfo *sn_tab, *sn; |
777 |
int nb_sns, i;
|
778 |
char buf[256]; |
779 |
|
780 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
781 |
if (nb_sns <= 0) |
782 |
return;
|
783 |
printf("Snapshot list:\n");
|
784 |
printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
785 |
for(i = 0; i < nb_sns; i++) { |
786 |
sn = &sn_tab[i]; |
787 |
printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
788 |
} |
789 |
qemu_free(sn_tab); |
790 |
} |
791 |
|
792 |
static int img_info(int argc, char **argv) |
793 |
{ |
794 |
int c;
|
795 |
const char *filename, *fmt; |
796 |
BlockDriver *drv; |
797 |
BlockDriverState *bs; |
798 |
char fmt_name[128], size_buf[128], dsize_buf[128]; |
799 |
uint64_t total_sectors; |
800 |
int64_t allocated_size; |
801 |
char backing_filename[1024]; |
802 |
char backing_filename2[1024]; |
803 |
BlockDriverInfo bdi; |
804 |
|
805 |
fmt = NULL;
|
806 |
for(;;) {
|
807 |
c = getopt(argc, argv, "f:h");
|
808 |
if (c == -1) |
809 |
break;
|
810 |
switch(c) {
|
811 |
case 'h': |
812 |
help(); |
813 |
break;
|
814 |
case 'f': |
815 |
fmt = optarg; |
816 |
break;
|
817 |
} |
818 |
} |
819 |
if (optind >= argc)
|
820 |
help(); |
821 |
filename = argv[optind++]; |
822 |
|
823 |
bs = bdrv_new("");
|
824 |
if (!bs)
|
825 |
error("Not enough memory");
|
826 |
if (fmt) {
|
827 |
drv = bdrv_find_format(fmt); |
828 |
if (!drv)
|
829 |
error("Unknown file format '%s'", fmt);
|
830 |
} else {
|
831 |
drv = NULL;
|
832 |
} |
833 |
if (bdrv_open2(bs, filename, BRDV_O_FLAGS, drv) < 0) { |
834 |
error("Could not open '%s'", filename);
|
835 |
} |
836 |
bdrv_get_format(bs, fmt_name, sizeof(fmt_name));
|
837 |
bdrv_get_geometry(bs, &total_sectors); |
838 |
get_human_readable_size(size_buf, sizeof(size_buf), total_sectors * 512); |
839 |
allocated_size = get_allocated_file_size(filename); |
840 |
if (allocated_size < 0) |
841 |
snprintf(dsize_buf, sizeof(dsize_buf), "unavailable"); |
842 |
else
|
843 |
get_human_readable_size(dsize_buf, sizeof(dsize_buf),
|
844 |
allocated_size); |
845 |
printf("image: %s\n"
|
846 |
"file format: %s\n"
|
847 |
"virtual size: %s (%" PRId64 " bytes)\n" |
848 |
"disk size: %s\n",
|
849 |
filename, fmt_name, size_buf, |
850 |
(total_sectors * 512),
|
851 |
dsize_buf); |
852 |
if (bdrv_is_encrypted(bs))
|
853 |
printf("encrypted: yes\n");
|
854 |
if (bdrv_get_info(bs, &bdi) >= 0) { |
855 |
if (bdi.cluster_size != 0) |
856 |
printf("cluster_size: %d\n", bdi.cluster_size);
|
857 |
} |
858 |
bdrv_get_backing_filename(bs, backing_filename, sizeof(backing_filename));
|
859 |
if (backing_filename[0] != '\0') { |
860 |
path_combine(backing_filename2, sizeof(backing_filename2),
|
861 |
filename, backing_filename); |
862 |
printf("backing file: %s (actual path: %s)\n",
|
863 |
backing_filename, |
864 |
backing_filename2); |
865 |
} |
866 |
dump_snapshots(bs); |
867 |
bdrv_delete(bs); |
868 |
return 0; |
869 |
} |
870 |
|
871 |
#define SNAPSHOT_LIST 1 |
872 |
#define SNAPSHOT_CREATE 2 |
873 |
#define SNAPSHOT_APPLY 3 |
874 |
#define SNAPSHOT_DELETE 4 |
875 |
|
876 |
static void img_snapshot(int argc, char **argv) |
877 |
{ |
878 |
BlockDriverState *bs; |
879 |
QEMUSnapshotInfo sn; |
880 |
char *filename, *snapshot_name = NULL; |
881 |
int c, ret;
|
882 |
int action = 0; |
883 |
qemu_timeval tv; |
884 |
|
885 |
/* Parse commandline parameters */
|
886 |
for(;;) {
|
887 |
c = getopt(argc, argv, "la:c:d:h");
|
888 |
if (c == -1) |
889 |
break;
|
890 |
switch(c) {
|
891 |
case 'h': |
892 |
help(); |
893 |
return;
|
894 |
case 'l': |
895 |
if (action) {
|
896 |
help(); |
897 |
return;
|
898 |
} |
899 |
action = SNAPSHOT_LIST; |
900 |
break;
|
901 |
case 'a': |
902 |
if (action) {
|
903 |
help(); |
904 |
return;
|
905 |
} |
906 |
action = SNAPSHOT_APPLY; |
907 |
snapshot_name = optarg; |
908 |
break;
|
909 |
case 'c': |
910 |
if (action) {
|
911 |
help(); |
912 |
return;
|
913 |
} |
914 |
action = SNAPSHOT_CREATE; |
915 |
snapshot_name = optarg; |
916 |
break;
|
917 |
case 'd': |
918 |
if (action) {
|
919 |
help(); |
920 |
return;
|
921 |
} |
922 |
action = SNAPSHOT_DELETE; |
923 |
snapshot_name = optarg; |
924 |
break;
|
925 |
} |
926 |
} |
927 |
|
928 |
if (optind >= argc)
|
929 |
help(); |
930 |
filename = argv[optind++]; |
931 |
|
932 |
/* Open the image */
|
933 |
bs = bdrv_new("");
|
934 |
if (!bs)
|
935 |
error("Not enough memory");
|
936 |
|
937 |
if (bdrv_open2(bs, filename, 0, NULL) < 0) { |
938 |
error("Could not open '%s'", filename);
|
939 |
} |
940 |
|
941 |
/* Perform the requested action */
|
942 |
switch(action) {
|
943 |
case SNAPSHOT_LIST:
|
944 |
dump_snapshots(bs); |
945 |
break;
|
946 |
|
947 |
case SNAPSHOT_CREATE:
|
948 |
memset(&sn, 0, sizeof(sn)); |
949 |
pstrcpy(sn.name, sizeof(sn.name), snapshot_name);
|
950 |
|
951 |
qemu_gettimeofday(&tv); |
952 |
sn.date_sec = tv.tv_sec; |
953 |
sn.date_nsec = tv.tv_usec * 1000;
|
954 |
|
955 |
ret = bdrv_snapshot_create(bs, &sn); |
956 |
if (ret)
|
957 |
error("Could not create snapshot '%s': %d (%s)",
|
958 |
snapshot_name, ret, strerror(-ret)); |
959 |
break;
|
960 |
|
961 |
case SNAPSHOT_APPLY:
|
962 |
ret = bdrv_snapshot_goto(bs, snapshot_name); |
963 |
if (ret)
|
964 |
error("Could not apply snapshot '%s': %d (%s)",
|
965 |
snapshot_name, ret, strerror(-ret)); |
966 |
break;
|
967 |
|
968 |
case SNAPSHOT_DELETE:
|
969 |
ret = bdrv_snapshot_delete(bs, snapshot_name); |
970 |
if (ret)
|
971 |
error("Could not delete snapshot '%s': %d (%s)",
|
972 |
snapshot_name, ret, strerror(-ret)); |
973 |
break;
|
974 |
} |
975 |
|
976 |
/* Cleanup */
|
977 |
bdrv_delete(bs); |
978 |
} |
979 |
|
980 |
int main(int argc, char **argv) |
981 |
{ |
982 |
const char *cmd; |
983 |
|
984 |
bdrv_init(); |
985 |
if (argc < 2) |
986 |
help(); |
987 |
cmd = argv[1];
|
988 |
argc--; argv++; |
989 |
if (!strcmp(cmd, "create")) { |
990 |
img_create(argc, argv); |
991 |
} else if (!strcmp(cmd, "check")) { |
992 |
img_check(argc, argv); |
993 |
} else if (!strcmp(cmd, "commit")) { |
994 |
img_commit(argc, argv); |
995 |
} else if (!strcmp(cmd, "convert")) { |
996 |
img_convert(argc, argv); |
997 |
} else if (!strcmp(cmd, "info")) { |
998 |
img_info(argc, argv); |
999 |
} else if (!strcmp(cmd, "snapshot")) { |
1000 |
img_snapshot(argc, argv); |
1001 |
} else {
|
1002 |
help(); |
1003 |
} |
1004 |
return 0; |
1005 |
} |