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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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typedef struct img_cmd_t { |
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const char *name; |
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int (*handler)(int argc, char **argv); |
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} img_cmd_t; |
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|
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/* 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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|
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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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#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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" '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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" '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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|
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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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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); |
205 |
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 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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|
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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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} |
242 |
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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} |
248 |
|
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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': |
273 |
base_filename = optarg; |
274 |
break;
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case 'f': |
276 |
fmt = optarg; |
277 |
break;
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case 'e': |
279 |
flags |= BLOCK_FLAG_ENCRYPT; |
280 |
break;
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case '6': |
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flags |= BLOCK_FLAG_COMPAT6; |
283 |
break;
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case 'o': |
285 |
options = optarg; |
286 |
break;
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} |
288 |
} |
289 |
|
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/* Find driver and parse its options */
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drv = bdrv_find_format(fmt); |
292 |
if (!drv)
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error("Unknown file format '%s'", fmt);
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|
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if (options && !strcmp(options, "?")) { |
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print_option_help(drv->create_options); |
297 |
return 0; |
298 |
} |
299 |
|
300 |
if (options) {
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param = parse_option_parameters(options, drv->create_options, param); |
302 |
if (param == NULL) { |
303 |
error("Invalid options for file format '%s'.", fmt);
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} |
305 |
} else {
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param = parse_option_parameters("", drv->create_options, param);
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} |
308 |
|
309 |
/* Get the filename */
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if (optind >= argc)
|
311 |
help(); |
312 |
filename = argv[optind++]; |
313 |
|
314 |
/* Add size to parameters */
|
315 |
if (optind < argc) {
|
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set_option_parameter(param, BLOCK_OPT_SIZE, argv[optind++]); |
317 |
} |
318 |
|
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/* Add old-style options to parameters */
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320 |
add_old_style_options(fmt, param, flags, base_filename, base_fmt); |
321 |
|
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// The size for the image must always be specified, with one exception:
|
323 |
// If we are using a backing file, we can obtain the size from there
|
324 |
if (get_option_parameter(param, BLOCK_OPT_SIZE)->value.n == 0) { |
325 |
|
326 |
QEMUOptionParameter *backing_file = |
327 |
get_option_parameter(param, BLOCK_OPT_BACKING_FILE); |
328 |
QEMUOptionParameter *backing_fmt = |
329 |
get_option_parameter(param, BLOCK_OPT_BACKING_FMT); |
330 |
|
331 |
if (backing_file && backing_file->value.s) {
|
332 |
BlockDriverState *bs; |
333 |
uint64_t size; |
334 |
const char *fmt = NULL; |
335 |
char buf[32]; |
336 |
|
337 |
if (backing_fmt && backing_fmt->value.s) {
|
338 |
if (bdrv_find_format(backing_fmt->value.s)) {
|
339 |
fmt = backing_fmt->value.s; |
340 |
} else {
|
341 |
error("Unknown backing file format '%s'",
|
342 |
backing_fmt->value.s); |
343 |
} |
344 |
} |
345 |
|
346 |
bs = bdrv_new_open(backing_file->value.s, fmt); |
347 |
bdrv_get_geometry(bs, &size); |
348 |
size *= 512;
|
349 |
bdrv_delete(bs); |
350 |
|
351 |
snprintf(buf, sizeof(buf), "%" PRId64, size); |
352 |
set_option_parameter(param, BLOCK_OPT_SIZE, buf); |
353 |
} else {
|
354 |
error("Image creation needs a size parameter");
|
355 |
} |
356 |
} |
357 |
|
358 |
printf("Formatting '%s', fmt=%s ", filename, fmt);
|
359 |
print_option_parameters(param); |
360 |
puts("");
|
361 |
|
362 |
ret = bdrv_create(drv, filename, param); |
363 |
free_option_parameters(param); |
364 |
|
365 |
if (ret < 0) { |
366 |
if (ret == -ENOTSUP) {
|
367 |
error("Formatting or formatting option not supported for file format '%s'", fmt);
|
368 |
} else if (ret == -EFBIG) { |
369 |
error("The image size is too large for file format '%s'", fmt);
|
370 |
} else {
|
371 |
error("Error while formatting");
|
372 |
} |
373 |
} |
374 |
return 0; |
375 |
} |
376 |
|
377 |
static int img_check(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_check(bs); |
416 |
switch(ret) {
|
417 |
case 0: |
418 |
printf("No errors were found on the image.\n");
|
419 |
break;
|
420 |
case -ENOTSUP:
|
421 |
error("This image format does not support checks");
|
422 |
break;
|
423 |
default:
|
424 |
if (ret < 0) { |
425 |
error("An error occurred during the check");
|
426 |
} else {
|
427 |
printf("%d errors were found on the image.\n", ret);
|
428 |
} |
429 |
break;
|
430 |
} |
431 |
|
432 |
bdrv_delete(bs); |
433 |
return 0; |
434 |
} |
435 |
|
436 |
static int img_commit(int argc, char **argv) |
437 |
{ |
438 |
int c, ret;
|
439 |
const char *filename, *fmt; |
440 |
BlockDriver *drv; |
441 |
BlockDriverState *bs; |
442 |
|
443 |
fmt = NULL;
|
444 |
for(;;) {
|
445 |
c = getopt(argc, argv, "f:h");
|
446 |
if (c == -1) |
447 |
break;
|
448 |
switch(c) {
|
449 |
case 'h': |
450 |
help(); |
451 |
break;
|
452 |
case 'f': |
453 |
fmt = optarg; |
454 |
break;
|
455 |
} |
456 |
} |
457 |
if (optind >= argc)
|
458 |
help(); |
459 |
filename = argv[optind++]; |
460 |
|
461 |
bs = bdrv_new("");
|
462 |
if (!bs)
|
463 |
error("Not enough memory");
|
464 |
if (fmt) {
|
465 |
drv = bdrv_find_format(fmt); |
466 |
if (!drv)
|
467 |
error("Unknown file format '%s'", fmt);
|
468 |
} else {
|
469 |
drv = NULL;
|
470 |
} |
471 |
if (bdrv_open2(bs, filename, BRDV_O_FLAGS, drv) < 0) { |
472 |
error("Could not open '%s'", filename);
|
473 |
} |
474 |
ret = bdrv_commit(bs); |
475 |
switch(ret) {
|
476 |
case 0: |
477 |
printf("Image committed.\n");
|
478 |
break;
|
479 |
case -ENOENT:
|
480 |
error("No disk inserted");
|
481 |
break;
|
482 |
case -EACCES:
|
483 |
error("Image is read-only");
|
484 |
break;
|
485 |
case -ENOTSUP:
|
486 |
error("Image is already committed");
|
487 |
break;
|
488 |
default:
|
489 |
error("Error while committing image");
|
490 |
break;
|
491 |
} |
492 |
|
493 |
bdrv_delete(bs); |
494 |
return 0; |
495 |
} |
496 |
|
497 |
static int is_not_zero(const uint8_t *sector, int len) |
498 |
{ |
499 |
int i;
|
500 |
len >>= 2;
|
501 |
for(i = 0;i < len; i++) { |
502 |
if (((uint32_t *)sector)[i] != 0) |
503 |
return 1; |
504 |
} |
505 |
return 0; |
506 |
} |
507 |
|
508 |
/*
|
509 |
* Returns true iff the first sector pointed to by 'buf' contains at least
|
510 |
* a non-NUL byte.
|
511 |
*
|
512 |
* 'pnum' is set to the number of sectors (including and immediately following
|
513 |
* the first one) that are known to be in the same allocated/unallocated state.
|
514 |
*/
|
515 |
static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) |
516 |
{ |
517 |
int v, i;
|
518 |
|
519 |
if (n <= 0) { |
520 |
*pnum = 0;
|
521 |
return 0; |
522 |
} |
523 |
v = is_not_zero(buf, 512);
|
524 |
for(i = 1; i < n; i++) { |
525 |
buf += 512;
|
526 |
if (v != is_not_zero(buf, 512)) |
527 |
break;
|
528 |
} |
529 |
*pnum = i; |
530 |
return v;
|
531 |
} |
532 |
|
533 |
#define IO_BUF_SIZE 65536 |
534 |
|
535 |
static int img_convert(int argc, char **argv) |
536 |
{ |
537 |
int c, ret, n, n1, bs_n, bs_i, flags, cluster_size, cluster_sectors;
|
538 |
const char *fmt, *out_fmt, *out_baseimg, *out_filename; |
539 |
BlockDriver *drv; |
540 |
BlockDriverState **bs, *out_bs; |
541 |
int64_t total_sectors, nb_sectors, sector_num, bs_offset; |
542 |
uint64_t bs_sectors; |
543 |
uint8_t buf[IO_BUF_SIZE]; |
544 |
const uint8_t *buf1;
|
545 |
BlockDriverInfo bdi; |
546 |
QEMUOptionParameter *param = NULL;
|
547 |
char *options = NULL; |
548 |
|
549 |
fmt = NULL;
|
550 |
out_fmt = "raw";
|
551 |
out_baseimg = NULL;
|
552 |
flags = 0;
|
553 |
for(;;) {
|
554 |
c = getopt(argc, argv, "f:O:B:hce6o:");
|
555 |
if (c == -1) |
556 |
break;
|
557 |
switch(c) {
|
558 |
case 'h': |
559 |
help(); |
560 |
break;
|
561 |
case 'f': |
562 |
fmt = optarg; |
563 |
break;
|
564 |
case 'O': |
565 |
out_fmt = optarg; |
566 |
break;
|
567 |
case 'B': |
568 |
out_baseimg = optarg; |
569 |
break;
|
570 |
case 'c': |
571 |
flags |= BLOCK_FLAG_COMPRESS; |
572 |
break;
|
573 |
case 'e': |
574 |
flags |= BLOCK_FLAG_ENCRYPT; |
575 |
break;
|
576 |
case '6': |
577 |
flags |= BLOCK_FLAG_COMPAT6; |
578 |
break;
|
579 |
case 'o': |
580 |
options = optarg; |
581 |
break;
|
582 |
} |
583 |
} |
584 |
|
585 |
bs_n = argc - optind - 1;
|
586 |
if (bs_n < 1) help(); |
587 |
|
588 |
out_filename = argv[argc - 1];
|
589 |
|
590 |
if (bs_n > 1 && out_baseimg) |
591 |
error("-B makes no sense when concatenating multiple input images");
|
592 |
|
593 |
bs = calloc(bs_n, sizeof(BlockDriverState *));
|
594 |
if (!bs)
|
595 |
error("Out of memory");
|
596 |
|
597 |
total_sectors = 0;
|
598 |
for (bs_i = 0; bs_i < bs_n; bs_i++) { |
599 |
bs[bs_i] = bdrv_new_open(argv[optind + bs_i], fmt); |
600 |
if (!bs[bs_i])
|
601 |
error("Could not open '%s'", argv[optind + bs_i]);
|
602 |
bdrv_get_geometry(bs[bs_i], &bs_sectors); |
603 |
total_sectors += bs_sectors; |
604 |
} |
605 |
|
606 |
/* Find driver and parse its options */
|
607 |
drv = bdrv_find_format(out_fmt); |
608 |
if (!drv)
|
609 |
error("Unknown file format '%s'", out_fmt);
|
610 |
|
611 |
if (options && !strcmp(options, "?")) { |
612 |
print_option_help(drv->create_options); |
613 |
return 0; |
614 |
} |
615 |
|
616 |
if (options) {
|
617 |
param = parse_option_parameters(options, drv->create_options, param); |
618 |
if (param == NULL) { |
619 |
error("Invalid options for file format '%s'.", out_fmt);
|
620 |
} |
621 |
} else {
|
622 |
param = parse_option_parameters("", drv->create_options, param);
|
623 |
} |
624 |
|
625 |
set_option_parameter_int(param, BLOCK_OPT_SIZE, total_sectors * 512);
|
626 |
add_old_style_options(out_fmt, param, flags, out_baseimg, NULL);
|
627 |
|
628 |
/* Check if compression is supported */
|
629 |
if (flags & BLOCK_FLAG_COMPRESS) {
|
630 |
QEMUOptionParameter *encryption = |
631 |
get_option_parameter(param, BLOCK_OPT_ENCRYPT); |
632 |
|
633 |
if (!drv->bdrv_write_compressed) {
|
634 |
error("Compression not supported for this file format");
|
635 |
} |
636 |
|
637 |
if (encryption && encryption->value.n) {
|
638 |
error("Compression and encryption not supported at the same time");
|
639 |
} |
640 |
} |
641 |
|
642 |
/* Create the new image */
|
643 |
ret = bdrv_create(drv, out_filename, param); |
644 |
free_option_parameters(param); |
645 |
|
646 |
if (ret < 0) { |
647 |
if (ret == -ENOTSUP) {
|
648 |
error("Formatting not supported for file format '%s'", out_fmt);
|
649 |
} else if (ret == -EFBIG) { |
650 |
error("The image size is too large for file format '%s'", out_fmt);
|
651 |
} else {
|
652 |
error("Error while formatting '%s'", out_filename);
|
653 |
} |
654 |
} |
655 |
|
656 |
out_bs = bdrv_new_open(out_filename, out_fmt); |
657 |
|
658 |
bs_i = 0;
|
659 |
bs_offset = 0;
|
660 |
bdrv_get_geometry(bs[0], &bs_sectors);
|
661 |
|
662 |
if (flags & BLOCK_FLAG_COMPRESS) {
|
663 |
if (bdrv_get_info(out_bs, &bdi) < 0) |
664 |
error("could not get block driver info");
|
665 |
cluster_size = bdi.cluster_size; |
666 |
if (cluster_size <= 0 || cluster_size > IO_BUF_SIZE) |
667 |
error("invalid cluster size");
|
668 |
cluster_sectors = cluster_size >> 9;
|
669 |
sector_num = 0;
|
670 |
for(;;) {
|
671 |
int64_t bs_num; |
672 |
int remainder;
|
673 |
uint8_t *buf2; |
674 |
|
675 |
nb_sectors = total_sectors - sector_num; |
676 |
if (nb_sectors <= 0) |
677 |
break;
|
678 |
if (nb_sectors >= cluster_sectors)
|
679 |
n = cluster_sectors; |
680 |
else
|
681 |
n = nb_sectors; |
682 |
|
683 |
bs_num = sector_num - bs_offset; |
684 |
assert (bs_num >= 0);
|
685 |
remainder = n; |
686 |
buf2 = buf; |
687 |
while (remainder > 0) { |
688 |
int nlow;
|
689 |
while (bs_num == bs_sectors) {
|
690 |
bs_i++; |
691 |
assert (bs_i < bs_n); |
692 |
bs_offset += bs_sectors; |
693 |
bdrv_get_geometry(bs[bs_i], &bs_sectors); |
694 |
bs_num = 0;
|
695 |
/* printf("changing part: sector_num=%lld, "
|
696 |
"bs_i=%d, bs_offset=%lld, bs_sectors=%lld\n",
|
697 |
sector_num, bs_i, bs_offset, bs_sectors); */
|
698 |
} |
699 |
assert (bs_num < bs_sectors); |
700 |
|
701 |
nlow = (remainder > bs_sectors - bs_num) ? bs_sectors - bs_num : remainder; |
702 |
|
703 |
if (bdrv_read(bs[bs_i], bs_num, buf2, nlow) < 0) |
704 |
error("error while reading");
|
705 |
|
706 |
buf2 += nlow * 512;
|
707 |
bs_num += nlow; |
708 |
|
709 |
remainder -= nlow; |
710 |
} |
711 |
assert (remainder == 0);
|
712 |
|
713 |
if (n < cluster_sectors)
|
714 |
memset(buf + n * 512, 0, cluster_size - n * 512); |
715 |
if (is_not_zero(buf, cluster_size)) {
|
716 |
if (bdrv_write_compressed(out_bs, sector_num, buf,
|
717 |
cluster_sectors) != 0)
|
718 |
error("error while compressing sector %" PRId64,
|
719 |
sector_num); |
720 |
} |
721 |
sector_num += n; |
722 |
} |
723 |
/* signal EOF to align */
|
724 |
bdrv_write_compressed(out_bs, 0, NULL, 0); |
725 |
} else {
|
726 |
sector_num = 0; // total number of sectors converted so far |
727 |
for(;;) {
|
728 |
nb_sectors = total_sectors - sector_num; |
729 |
if (nb_sectors <= 0) |
730 |
break;
|
731 |
if (nb_sectors >= (IO_BUF_SIZE / 512)) |
732 |
n = (IO_BUF_SIZE / 512);
|
733 |
else
|
734 |
n = nb_sectors; |
735 |
|
736 |
while (sector_num - bs_offset >= bs_sectors) {
|
737 |
bs_i ++; |
738 |
assert (bs_i < bs_n); |
739 |
bs_offset += bs_sectors; |
740 |
bdrv_get_geometry(bs[bs_i], &bs_sectors); |
741 |
/* printf("changing part: sector_num=%lld, bs_i=%d, "
|
742 |
"bs_offset=%lld, bs_sectors=%lld\n",
|
743 |
sector_num, bs_i, bs_offset, bs_sectors); */
|
744 |
} |
745 |
|
746 |
if (n > bs_offset + bs_sectors - sector_num)
|
747 |
n = bs_offset + bs_sectors - sector_num; |
748 |
|
749 |
if (strcmp(drv->format_name, "host_device")) { |
750 |
/* If the output image is being created as a copy on write image,
|
751 |
assume that sectors which are unallocated in the input image
|
752 |
are present in both the output's and input's base images (no
|
753 |
need to copy them). */
|
754 |
if (out_baseimg) {
|
755 |
if (!bdrv_is_allocated(bs[bs_i], sector_num - bs_offset,
|
756 |
n, &n1)) { |
757 |
sector_num += n1; |
758 |
continue;
|
759 |
} |
760 |
/* The next 'n1' sectors are allocated in the input image. Copy
|
761 |
only those as they may be followed by unallocated sectors. */
|
762 |
n = n1; |
763 |
} |
764 |
} else {
|
765 |
n1 = n; |
766 |
} |
767 |
|
768 |
if (bdrv_read(bs[bs_i], sector_num - bs_offset, buf, n) < 0) |
769 |
error("error while reading");
|
770 |
/* NOTE: at the same time we convert, we do not write zero
|
771 |
sectors to have a chance to compress the image. Ideally, we
|
772 |
should add a specific call to have the info to go faster */
|
773 |
buf1 = buf; |
774 |
while (n > 0) { |
775 |
/* If the output image is being created as a copy on write image,
|
776 |
copy all sectors even the ones containing only NUL bytes,
|
777 |
because they may differ from the sectors in the base image.
|
778 |
|
779 |
If the output is to a host device, we also write out
|
780 |
sectors that are entirely 0, since whatever data was
|
781 |
already there is garbage, not 0s. */
|
782 |
if (strcmp(drv->format_name, "host_device") == 0 || out_baseimg || |
783 |
is_allocated_sectors(buf1, n, &n1)) { |
784 |
if (bdrv_write(out_bs, sector_num, buf1, n1) < 0) |
785 |
error("error while writing");
|
786 |
} |
787 |
sector_num += n1; |
788 |
n -= n1; |
789 |
buf1 += n1 * 512;
|
790 |
} |
791 |
} |
792 |
} |
793 |
bdrv_delete(out_bs); |
794 |
for (bs_i = 0; bs_i < bs_n; bs_i++) |
795 |
bdrv_delete(bs[bs_i]); |
796 |
free(bs); |
797 |
return 0; |
798 |
} |
799 |
|
800 |
#ifdef _WIN32
|
801 |
static int64_t get_allocated_file_size(const char *filename) |
802 |
{ |
803 |
typedef DWORD (WINAPI * get_compressed_t)(const char *filename, DWORD *high); |
804 |
get_compressed_t get_compressed; |
805 |
struct _stati64 st;
|
806 |
|
807 |
/* WinNT support GetCompressedFileSize to determine allocate size */
|
808 |
get_compressed = (get_compressed_t) GetProcAddress(GetModuleHandle("kernel32"), "GetCompressedFileSizeA"); |
809 |
if (get_compressed) {
|
810 |
DWORD high, low; |
811 |
low = get_compressed(filename, &high); |
812 |
if (low != 0xFFFFFFFFlu || GetLastError() == NO_ERROR) |
813 |
return (((int64_t) high) << 32) + low; |
814 |
} |
815 |
|
816 |
if (_stati64(filename, &st) < 0) |
817 |
return -1; |
818 |
return st.st_size;
|
819 |
} |
820 |
#else
|
821 |
static int64_t get_allocated_file_size(const char *filename) |
822 |
{ |
823 |
struct stat st;
|
824 |
if (stat(filename, &st) < 0) |
825 |
return -1; |
826 |
return (int64_t)st.st_blocks * 512; |
827 |
} |
828 |
#endif
|
829 |
|
830 |
static void dump_snapshots(BlockDriverState *bs) |
831 |
{ |
832 |
QEMUSnapshotInfo *sn_tab, *sn; |
833 |
int nb_sns, i;
|
834 |
char buf[256]; |
835 |
|
836 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
837 |
if (nb_sns <= 0) |
838 |
return;
|
839 |
printf("Snapshot list:\n");
|
840 |
printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
841 |
for(i = 0; i < nb_sns; i++) { |
842 |
sn = &sn_tab[i]; |
843 |
printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
844 |
} |
845 |
qemu_free(sn_tab); |
846 |
} |
847 |
|
848 |
static int img_info(int argc, char **argv) |
849 |
{ |
850 |
int c;
|
851 |
const char *filename, *fmt; |
852 |
BlockDriver *drv; |
853 |
BlockDriverState *bs; |
854 |
char fmt_name[128], size_buf[128], dsize_buf[128]; |
855 |
uint64_t total_sectors; |
856 |
int64_t allocated_size; |
857 |
char backing_filename[1024]; |
858 |
char backing_filename2[1024]; |
859 |
BlockDriverInfo bdi; |
860 |
|
861 |
fmt = NULL;
|
862 |
for(;;) {
|
863 |
c = getopt(argc, argv, "f:h");
|
864 |
if (c == -1) |
865 |
break;
|
866 |
switch(c) {
|
867 |
case 'h': |
868 |
help(); |
869 |
break;
|
870 |
case 'f': |
871 |
fmt = optarg; |
872 |
break;
|
873 |
} |
874 |
} |
875 |
if (optind >= argc)
|
876 |
help(); |
877 |
filename = argv[optind++]; |
878 |
|
879 |
bs = bdrv_new("");
|
880 |
if (!bs)
|
881 |
error("Not enough memory");
|
882 |
if (fmt) {
|
883 |
drv = bdrv_find_format(fmt); |
884 |
if (!drv)
|
885 |
error("Unknown file format '%s'", fmt);
|
886 |
} else {
|
887 |
drv = NULL;
|
888 |
} |
889 |
if (bdrv_open2(bs, filename, BRDV_O_FLAGS, drv) < 0) { |
890 |
error("Could not open '%s'", filename);
|
891 |
} |
892 |
bdrv_get_format(bs, fmt_name, sizeof(fmt_name));
|
893 |
bdrv_get_geometry(bs, &total_sectors); |
894 |
get_human_readable_size(size_buf, sizeof(size_buf), total_sectors * 512); |
895 |
allocated_size = get_allocated_file_size(filename); |
896 |
if (allocated_size < 0) |
897 |
snprintf(dsize_buf, sizeof(dsize_buf), "unavailable"); |
898 |
else
|
899 |
get_human_readable_size(dsize_buf, sizeof(dsize_buf),
|
900 |
allocated_size); |
901 |
printf("image: %s\n"
|
902 |
"file format: %s\n"
|
903 |
"virtual size: %s (%" PRId64 " bytes)\n" |
904 |
"disk size: %s\n",
|
905 |
filename, fmt_name, size_buf, |
906 |
(total_sectors * 512),
|
907 |
dsize_buf); |
908 |
if (bdrv_is_encrypted(bs))
|
909 |
printf("encrypted: yes\n");
|
910 |
if (bdrv_get_info(bs, &bdi) >= 0) { |
911 |
if (bdi.cluster_size != 0) |
912 |
printf("cluster_size: %d\n", bdi.cluster_size);
|
913 |
} |
914 |
bdrv_get_backing_filename(bs, backing_filename, sizeof(backing_filename));
|
915 |
if (backing_filename[0] != '\0') { |
916 |
path_combine(backing_filename2, sizeof(backing_filename2),
|
917 |
filename, backing_filename); |
918 |
printf("backing file: %s (actual path: %s)\n",
|
919 |
backing_filename, |
920 |
backing_filename2); |
921 |
} |
922 |
dump_snapshots(bs); |
923 |
bdrv_delete(bs); |
924 |
return 0; |
925 |
} |
926 |
|
927 |
#define SNAPSHOT_LIST 1 |
928 |
#define SNAPSHOT_CREATE 2 |
929 |
#define SNAPSHOT_APPLY 3 |
930 |
#define SNAPSHOT_DELETE 4 |
931 |
|
932 |
static int img_snapshot(int argc, char **argv) |
933 |
{ |
934 |
BlockDriverState *bs; |
935 |
QEMUSnapshotInfo sn; |
936 |
char *filename, *snapshot_name = NULL; |
937 |
int c, ret;
|
938 |
int action = 0; |
939 |
qemu_timeval tv; |
940 |
|
941 |
/* Parse commandline parameters */
|
942 |
for(;;) {
|
943 |
c = getopt(argc, argv, "la:c:d:h");
|
944 |
if (c == -1) |
945 |
break;
|
946 |
switch(c) {
|
947 |
case 'h': |
948 |
help(); |
949 |
return 0; |
950 |
case 'l': |
951 |
if (action) {
|
952 |
help(); |
953 |
return 0; |
954 |
} |
955 |
action = SNAPSHOT_LIST; |
956 |
break;
|
957 |
case 'a': |
958 |
if (action) {
|
959 |
help(); |
960 |
return 0; |
961 |
} |
962 |
action = SNAPSHOT_APPLY; |
963 |
snapshot_name = optarg; |
964 |
break;
|
965 |
case 'c': |
966 |
if (action) {
|
967 |
help(); |
968 |
return 0; |
969 |
} |
970 |
action = SNAPSHOT_CREATE; |
971 |
snapshot_name = optarg; |
972 |
break;
|
973 |
case 'd': |
974 |
if (action) {
|
975 |
help(); |
976 |
return 0; |
977 |
} |
978 |
action = SNAPSHOT_DELETE; |
979 |
snapshot_name = optarg; |
980 |
break;
|
981 |
} |
982 |
} |
983 |
|
984 |
if (optind >= argc)
|
985 |
help(); |
986 |
filename = argv[optind++]; |
987 |
|
988 |
/* Open the image */
|
989 |
bs = bdrv_new("");
|
990 |
if (!bs)
|
991 |
error("Not enough memory");
|
992 |
|
993 |
if (bdrv_open2(bs, filename, 0, NULL) < 0) { |
994 |
error("Could not open '%s'", filename);
|
995 |
} |
996 |
|
997 |
/* Perform the requested action */
|
998 |
switch(action) {
|
999 |
case SNAPSHOT_LIST:
|
1000 |
dump_snapshots(bs); |
1001 |
break;
|
1002 |
|
1003 |
case SNAPSHOT_CREATE:
|
1004 |
memset(&sn, 0, sizeof(sn)); |
1005 |
pstrcpy(sn.name, sizeof(sn.name), snapshot_name);
|
1006 |
|
1007 |
qemu_gettimeofday(&tv); |
1008 |
sn.date_sec = tv.tv_sec; |
1009 |
sn.date_nsec = tv.tv_usec * 1000;
|
1010 |
|
1011 |
ret = bdrv_snapshot_create(bs, &sn); |
1012 |
if (ret)
|
1013 |
error("Could not create snapshot '%s': %d (%s)",
|
1014 |
snapshot_name, ret, strerror(-ret)); |
1015 |
break;
|
1016 |
|
1017 |
case SNAPSHOT_APPLY:
|
1018 |
ret = bdrv_snapshot_goto(bs, snapshot_name); |
1019 |
if (ret)
|
1020 |
error("Could not apply snapshot '%s': %d (%s)",
|
1021 |
snapshot_name, ret, strerror(-ret)); |
1022 |
break;
|
1023 |
|
1024 |
case SNAPSHOT_DELETE:
|
1025 |
ret = bdrv_snapshot_delete(bs, snapshot_name); |
1026 |
if (ret)
|
1027 |
error("Could not delete snapshot '%s': %d (%s)",
|
1028 |
snapshot_name, ret, strerror(-ret)); |
1029 |
break;
|
1030 |
} |
1031 |
|
1032 |
/* Cleanup */
|
1033 |
bdrv_delete(bs); |
1034 |
|
1035 |
return 0; |
1036 |
} |
1037 |
|
1038 |
static const img_cmd_t img_cmds[] = { |
1039 |
#define DEF(option, callback, arg_string) \
|
1040 |
{ option, callback }, |
1041 |
#include "qemu-img-cmds.h" |
1042 |
#undef DEF
|
1043 |
#undef GEN_DOCS
|
1044 |
{ NULL, NULL, }, |
1045 |
}; |
1046 |
|
1047 |
int main(int argc, char **argv) |
1048 |
{ |
1049 |
const img_cmd_t *cmd;
|
1050 |
const char *cmdname; |
1051 |
|
1052 |
bdrv_init(); |
1053 |
if (argc < 2) |
1054 |
help(); |
1055 |
cmdname = argv[1];
|
1056 |
argc--; argv++; |
1057 |
|
1058 |
/* find the command */
|
1059 |
for(cmd = img_cmds; cmd->name != NULL; cmd++) { |
1060 |
if (!strcmp(cmdname, cmd->name)) {
|
1061 |
return cmd->handler(argc, argv);
|
1062 |
} |
1063 |
} |
1064 |
|
1065 |
/* not found */
|
1066 |
help(); |
1067 |
return 0; |
1068 |
} |