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/*
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* QEMU disk image utility
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*
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* Copyright (c) 2003-2007 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 "vl.h" |
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#include "block_int.h" |
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#ifdef _WIN32
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#include <windows.h> |
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#endif
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|
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void *get_mmap_addr(unsigned long size) |
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{ |
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return NULL; |
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} |
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|
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void qemu_free(void *ptr) |
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{ |
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free(ptr); |
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} |
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void *qemu_malloc(size_t size)
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{ |
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return malloc(size);
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} |
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void *qemu_mallocz(size_t size)
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{ |
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void *ptr;
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ptr = qemu_malloc(size); |
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if (!ptr)
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return NULL; |
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memset(ptr, 0, size);
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return ptr;
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} |
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char *qemu_strdup(const char *str) |
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{ |
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char *ptr;
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ptr = qemu_malloc(strlen(str) + 1);
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if (!ptr)
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return NULL; |
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strcpy(ptr, str); |
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return ptr;
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} |
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|
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void term_printf(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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vprintf(fmt, ap); |
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va_end(ap); |
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} |
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|
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void term_print_filename(const char *filename) |
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{ |
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term_printf(filename); |
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} |
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|
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void __attribute__((noreturn)) error(const char *fmt, ...) |
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{ |
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va_list ap; |
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va_start(ap, fmt); |
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fprintf(stderr, "qemu-img: ");
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vfprintf(stderr, fmt, ap); |
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fprintf(stderr, "\n");
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exit(1);
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va_end(ap); |
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} |
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static void format_print(void *opaque, const char *name) |
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{ |
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printf(" %s", name);
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} |
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void help(void) |
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{ |
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printf("qemu-img version " QEMU_VERSION ", Copyright (c) 2004-2007 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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" create [-e] [-6] [-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] filename [-O output_fmt] output_filename\n"
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" info [-f fmt] 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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" '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 'M' (megabyte)\n"
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" and 'G' (gigabyte) are supported\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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); |
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printf("\nSupported format:");
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bdrv_iterate_format(format_print, NULL);
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printf("\n");
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exit(1);
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} |
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#if defined(WIN32)
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/* XXX: put correct support for win32 */
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static int read_password(char *buf, int buf_size) |
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{ |
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int c, i;
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printf("Password: ");
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fflush(stdout); |
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i = 0;
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for(;;) {
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c = getchar(); |
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if (c == '\n') |
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break;
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if (i < (buf_size - 1)) |
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buf[i++] = c; |
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} |
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buf[i] = '\0';
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return 0; |
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} |
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#else
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#include <termios.h> |
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static struct termios oldtty; |
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static void term_exit(void) |
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{ |
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tcsetattr (0, TCSANOW, &oldtty);
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} |
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static void term_init(void) |
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{ |
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struct termios tty;
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tcgetattr (0, &tty);
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oldtty = tty; |
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tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP |
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|INLCR|IGNCR|ICRNL|IXON); |
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tty.c_oflag |= OPOST; |
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tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN); |
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tty.c_cflag &= ~(CSIZE|PARENB); |
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tty.c_cflag |= CS8; |
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tty.c_cc[VMIN] = 1;
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tty.c_cc[VTIME] = 0;
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tcsetattr (0, TCSANOW, &tty);
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atexit(term_exit); |
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} |
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int read_password(char *buf, int buf_size) |
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{ |
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uint8_t ch; |
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int i, ret;
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printf("password: ");
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fflush(stdout); |
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term_init(); |
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i = 0;
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for(;;) {
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ret = read(0, &ch, 1); |
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if (ret == -1) { |
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if (errno == EAGAIN || errno == EINTR) {
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continue;
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} else {
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ret = -1;
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break;
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} |
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} else if (ret == 0) { |
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ret = -1;
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break;
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} else {
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if (ch == '\r') { |
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ret = 0;
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break;
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} |
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if (i < (buf_size - 1)) |
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buf[i++] = ch; |
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} |
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} |
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term_exit(); |
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buf[i] = '\0';
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printf("\n");
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return ret;
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} |
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#endif
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static BlockDriverState *bdrv_new_open(const char *filename, |
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const char *fmt) |
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{ |
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BlockDriverState *bs; |
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BlockDriver *drv; |
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char password[256]; |
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bs = bdrv_new("");
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if (!bs)
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error("Not enough memory");
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if (fmt) {
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drv = bdrv_find_format(fmt); |
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if (!drv)
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error("Unknown file format '%s'", fmt);
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} else {
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drv = NULL;
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} |
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if (bdrv_open2(bs, filename, 0, 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 *filename; |
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const char *base_filename = NULL; |
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int64_t size; |
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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, "b:f:he6");
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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 'b': |
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base_filename = optarg; |
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break;
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case 'f': |
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fmt = optarg; |
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break;
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case 'e': |
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flags |= BLOCK_FLAG_ENCRYPT; |
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break;
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case '6': |
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flags |= BLOCK_FLAG_COMPAT6; |
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break;
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} |
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} |
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if (optind >= argc)
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help(); |
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filename = argv[optind++]; |
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size = 0;
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if (base_filename) {
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BlockDriverState *bs; |
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bs = bdrv_new_open(base_filename, NULL);
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bdrv_get_geometry(bs, &size); |
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size *= 512;
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bdrv_delete(bs); |
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} else {
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if (optind >= argc)
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help(); |
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p = argv[optind]; |
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size = strtoul(p, (char **)&p, 0); |
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if (*p == 'M') { |
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size *= 1024 * 1024; |
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} else if (*p == 'G') { |
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size *= 1024 * 1024 * 1024; |
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} else if (*p == 'k' || *p == 'K' || *p == '\0') { |
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size *= 1024;
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} else {
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help(); |
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} |
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} |
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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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printf("Formatting '%s', fmt=%s",
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filename, fmt); |
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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); |
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} |
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printf(", size=%" PRId64 " kB\n", (int64_t) (size / 1024)); |
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ret = bdrv_create(drv, filename, size / 512, base_filename, flags);
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if (ret < 0) { |
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if (ret == -ENOTSUP) {
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error("Formatting or formatting option not supported for file format '%s'", fmt);
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} else {
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error("Error while formatting");
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} |
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} |
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return 0; |
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} |
326 |
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static int img_commit(int argc, char **argv) |
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{ |
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int c, ret;
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const char *filename, *fmt; |
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BlockDriver *drv; |
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BlockDriverState *bs; |
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fmt = NULL;
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for(;;) {
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c = getopt(argc, argv, "f:h");
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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': |
344 |
fmt = optarg; |
345 |
break;
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} |
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} |
348 |
if (optind >= argc)
|
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help(); |
350 |
filename = argv[optind++]; |
351 |
|
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bs = bdrv_new("");
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353 |
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); |
357 |
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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} |
362 |
if (bdrv_open2(bs, filename, 0, drv) < 0) { |
363 |
error("Could not open '%s'", filename);
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} |
365 |
ret = bdrv_commit(bs); |
366 |
switch(ret) {
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367 |
case 0: |
368 |
printf("Image committed.\n");
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369 |
break;
|
370 |
case -ENOENT:
|
371 |
error("No disk inserted");
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372 |
break;
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373 |
case -EACCES:
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374 |
error("Image is read-only");
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375 |
break;
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376 |
case -ENOTSUP:
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377 |
error("Image is already committed");
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378 |
break;
|
379 |
default:
|
380 |
error("Error while committing image");
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381 |
break;
|
382 |
} |
383 |
|
384 |
bdrv_delete(bs); |
385 |
return 0; |
386 |
} |
387 |
|
388 |
static int is_not_zero(const uint8_t *sector, int len) |
389 |
{ |
390 |
int i;
|
391 |
len >>= 2;
|
392 |
for(i = 0;i < len; i++) { |
393 |
if (((uint32_t *)sector)[i] != 0) |
394 |
return 1; |
395 |
} |
396 |
return 0; |
397 |
} |
398 |
|
399 |
static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) |
400 |
{ |
401 |
int v, i;
|
402 |
|
403 |
if (n <= 0) { |
404 |
*pnum = 0;
|
405 |
return 0; |
406 |
} |
407 |
v = is_not_zero(buf, 512);
|
408 |
for(i = 1; i < n; i++) { |
409 |
buf += 512;
|
410 |
if (v != is_not_zero(buf, 512)) |
411 |
break;
|
412 |
} |
413 |
*pnum = i; |
414 |
return v;
|
415 |
} |
416 |
|
417 |
#define IO_BUF_SIZE 65536 |
418 |
|
419 |
static int img_convert(int argc, char **argv) |
420 |
{ |
421 |
int c, ret, n, n1, flags, cluster_size, cluster_sectors;
|
422 |
const char *filename, *fmt, *out_fmt, *out_filename; |
423 |
BlockDriver *drv; |
424 |
BlockDriverState *bs, *out_bs; |
425 |
int64_t total_sectors, nb_sectors, sector_num; |
426 |
uint8_t buf[IO_BUF_SIZE]; |
427 |
const uint8_t *buf1;
|
428 |
BlockDriverInfo bdi; |
429 |
|
430 |
fmt = NULL;
|
431 |
out_fmt = "raw";
|
432 |
flags = 0;
|
433 |
for(;;) {
|
434 |
c = getopt(argc, argv, "f:O:hce6");
|
435 |
if (c == -1) |
436 |
break;
|
437 |
switch(c) {
|
438 |
case 'h': |
439 |
help(); |
440 |
break;
|
441 |
case 'f': |
442 |
fmt = optarg; |
443 |
break;
|
444 |
case 'O': |
445 |
out_fmt = optarg; |
446 |
break;
|
447 |
case 'c': |
448 |
flags |= BLOCK_FLAG_COMPRESS; |
449 |
break;
|
450 |
case 'e': |
451 |
flags |= BLOCK_FLAG_ENCRYPT; |
452 |
break;
|
453 |
case '6': |
454 |
flags |= BLOCK_FLAG_COMPAT6; |
455 |
break;
|
456 |
} |
457 |
} |
458 |
if (optind >= argc)
|
459 |
help(); |
460 |
filename = argv[optind++]; |
461 |
if (optind >= argc)
|
462 |
help(); |
463 |
out_filename = argv[optind++]; |
464 |
|
465 |
bs = bdrv_new_open(filename, fmt); |
466 |
|
467 |
drv = bdrv_find_format(out_fmt); |
468 |
if (!drv)
|
469 |
error("Unknown file format '%s'", out_fmt);
|
470 |
if (flags & BLOCK_FLAG_COMPRESS && drv != &bdrv_qcow && drv != &bdrv_qcow2)
|
471 |
error("Compression not supported for this file format");
|
472 |
if (flags & BLOCK_FLAG_ENCRYPT && drv != &bdrv_qcow && drv != &bdrv_qcow2)
|
473 |
error("Encryption not supported for this file format");
|
474 |
if (flags & BLOCK_FLAG_COMPRESS && drv != &bdrv_vmdk)
|
475 |
error("Alternative compatibility level not supported for this file format");
|
476 |
if (flags & BLOCK_FLAG_ENCRYPT && flags & BLOCK_FLAG_COMPRESS)
|
477 |
error("Compression and encryption not supported at the same time");
|
478 |
bdrv_get_geometry(bs, &total_sectors); |
479 |
ret = bdrv_create(drv, out_filename, total_sectors, NULL, flags);
|
480 |
if (ret < 0) { |
481 |
if (ret == -ENOTSUP) {
|
482 |
error("Formatting not supported for file format '%s'", fmt);
|
483 |
} else {
|
484 |
error("Error while formatting '%s'", out_filename);
|
485 |
} |
486 |
} |
487 |
|
488 |
out_bs = bdrv_new_open(out_filename, out_fmt); |
489 |
|
490 |
if (flags && BLOCK_FLAG_COMPRESS) {
|
491 |
if (bdrv_get_info(out_bs, &bdi) < 0) |
492 |
error("could not get block driver info");
|
493 |
cluster_size = bdi.cluster_size; |
494 |
if (cluster_size <= 0 || cluster_size > IO_BUF_SIZE) |
495 |
error("invalid cluster size");
|
496 |
cluster_sectors = cluster_size >> 9;
|
497 |
sector_num = 0;
|
498 |
for(;;) {
|
499 |
nb_sectors = total_sectors - sector_num; |
500 |
if (nb_sectors <= 0) |
501 |
break;
|
502 |
if (nb_sectors >= cluster_sectors)
|
503 |
n = cluster_sectors; |
504 |
else
|
505 |
n = nb_sectors; |
506 |
if (bdrv_read(bs, sector_num, buf, n) < 0) |
507 |
error("error while reading");
|
508 |
if (n < cluster_sectors)
|
509 |
memset(buf + n * 512, 0, cluster_size - n * 512); |
510 |
if (is_not_zero(buf, cluster_size)) {
|
511 |
if (bdrv_write_compressed(out_bs, sector_num, buf,
|
512 |
cluster_sectors) != 0)
|
513 |
error("error while compressing sector %" PRId64,
|
514 |
sector_num); |
515 |
} |
516 |
sector_num += n; |
517 |
} |
518 |
/* signal EOF to align */
|
519 |
bdrv_write_compressed(out_bs, 0, NULL, 0); |
520 |
} else {
|
521 |
sector_num = 0;
|
522 |
for(;;) {
|
523 |
nb_sectors = total_sectors - sector_num; |
524 |
if (nb_sectors <= 0) |
525 |
break;
|
526 |
if (nb_sectors >= (IO_BUF_SIZE / 512)) |
527 |
n = (IO_BUF_SIZE / 512);
|
528 |
else
|
529 |
n = nb_sectors; |
530 |
if (bdrv_read(bs, sector_num, buf, n) < 0) |
531 |
error("error while reading");
|
532 |
/* NOTE: at the same time we convert, we do not write zero
|
533 |
sectors to have a chance to compress the image. Ideally, we
|
534 |
should add a specific call to have the info to go faster */
|
535 |
buf1 = buf; |
536 |
while (n > 0) { |
537 |
if (is_allocated_sectors(buf1, n, &n1)) {
|
538 |
if (bdrv_write(out_bs, sector_num, buf1, n1) < 0) |
539 |
error("error while writing");
|
540 |
} |
541 |
sector_num += n1; |
542 |
n -= n1; |
543 |
buf1 += n1 * 512;
|
544 |
} |
545 |
} |
546 |
} |
547 |
bdrv_delete(out_bs); |
548 |
bdrv_delete(bs); |
549 |
return 0; |
550 |
} |
551 |
|
552 |
#ifdef _WIN32
|
553 |
static int64_t get_allocated_file_size(const char *filename) |
554 |
{ |
555 |
typedef DWORD (WINAPI * get_compressed_t)(const char *filename, DWORD *high); |
556 |
get_compressed_t get_compressed; |
557 |
struct _stati64 st;
|
558 |
|
559 |
/* WinNT support GetCompressedFileSize to determine allocate size */
|
560 |
get_compressed = (get_compressed_t) GetProcAddress(GetModuleHandle("kernel32"), "GetCompressedFileSizeA"); |
561 |
if (get_compressed) {
|
562 |
DWORD high, low; |
563 |
low = get_compressed(filename, &high); |
564 |
if (low != 0xFFFFFFFFlu || GetLastError() == NO_ERROR) |
565 |
return (((int64_t) high) << 32) + low; |
566 |
} |
567 |
|
568 |
if (_stati64(filename, &st) < 0) |
569 |
return -1; |
570 |
return st.st_size;
|
571 |
} |
572 |
#else
|
573 |
static int64_t get_allocated_file_size(const char *filename) |
574 |
{ |
575 |
struct stat st;
|
576 |
if (stat(filename, &st) < 0) |
577 |
return -1; |
578 |
return (int64_t)st.st_blocks * 512; |
579 |
} |
580 |
#endif
|
581 |
|
582 |
static void dump_snapshots(BlockDriverState *bs) |
583 |
{ |
584 |
QEMUSnapshotInfo *sn_tab, *sn; |
585 |
int nb_sns, i;
|
586 |
char buf[256]; |
587 |
|
588 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
589 |
if (nb_sns <= 0) |
590 |
return;
|
591 |
printf("Snapshot list:\n");
|
592 |
printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
593 |
for(i = 0; i < nb_sns; i++) { |
594 |
sn = &sn_tab[i]; |
595 |
printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
596 |
} |
597 |
qemu_free(sn_tab); |
598 |
} |
599 |
|
600 |
static int img_info(int argc, char **argv) |
601 |
{ |
602 |
int c;
|
603 |
const char *filename, *fmt; |
604 |
BlockDriver *drv; |
605 |
BlockDriverState *bs; |
606 |
char fmt_name[128], size_buf[128], dsize_buf[128]; |
607 |
int64_t total_sectors, allocated_size; |
608 |
char backing_filename[1024]; |
609 |
char backing_filename2[1024]; |
610 |
BlockDriverInfo bdi; |
611 |
|
612 |
fmt = NULL;
|
613 |
for(;;) {
|
614 |
c = getopt(argc, argv, "f:h");
|
615 |
if (c == -1) |
616 |
break;
|
617 |
switch(c) {
|
618 |
case 'h': |
619 |
help(); |
620 |
break;
|
621 |
case 'f': |
622 |
fmt = optarg; |
623 |
break;
|
624 |
} |
625 |
} |
626 |
if (optind >= argc)
|
627 |
help(); |
628 |
filename = argv[optind++]; |
629 |
|
630 |
bs = bdrv_new("");
|
631 |
if (!bs)
|
632 |
error("Not enough memory");
|
633 |
if (fmt) {
|
634 |
drv = bdrv_find_format(fmt); |
635 |
if (!drv)
|
636 |
error("Unknown file format '%s'", fmt);
|
637 |
} else {
|
638 |
drv = NULL;
|
639 |
} |
640 |
if (bdrv_open2(bs, filename, 0, drv) < 0) { |
641 |
error("Could not open '%s'", filename);
|
642 |
} |
643 |
bdrv_get_format(bs, fmt_name, sizeof(fmt_name));
|
644 |
bdrv_get_geometry(bs, &total_sectors); |
645 |
get_human_readable_size(size_buf, sizeof(size_buf), total_sectors * 512); |
646 |
allocated_size = get_allocated_file_size(filename); |
647 |
if (allocated_size < 0) |
648 |
sprintf(dsize_buf, "unavailable");
|
649 |
else
|
650 |
get_human_readable_size(dsize_buf, sizeof(dsize_buf),
|
651 |
allocated_size); |
652 |
printf("image: %s\n"
|
653 |
"file format: %s\n"
|
654 |
"virtual size: %s (%" PRId64 " bytes)\n" |
655 |
"disk size: %s\n",
|
656 |
filename, fmt_name, size_buf, |
657 |
(total_sectors * 512),
|
658 |
dsize_buf); |
659 |
if (bdrv_is_encrypted(bs))
|
660 |
printf("encrypted: yes\n");
|
661 |
if (bdrv_get_info(bs, &bdi) >= 0) { |
662 |
if (bdi.cluster_size != 0) |
663 |
printf("cluster_size: %d\n", bdi.cluster_size);
|
664 |
} |
665 |
bdrv_get_backing_filename(bs, backing_filename, sizeof(backing_filename));
|
666 |
if (backing_filename[0] != '\0') { |
667 |
path_combine(backing_filename2, sizeof(backing_filename2),
|
668 |
filename, backing_filename); |
669 |
printf("backing file: %s (actual path: %s)\n",
|
670 |
backing_filename, |
671 |
backing_filename2); |
672 |
} |
673 |
dump_snapshots(bs); |
674 |
bdrv_delete(bs); |
675 |
return 0; |
676 |
} |
677 |
|
678 |
int main(int argc, char **argv) |
679 |
{ |
680 |
const char *cmd; |
681 |
|
682 |
bdrv_init(); |
683 |
if (argc < 2) |
684 |
help(); |
685 |
cmd = argv[1];
|
686 |
optind++; |
687 |
if (!strcmp(cmd, "create")) { |
688 |
img_create(argc, argv); |
689 |
} else if (!strcmp(cmd, "commit")) { |
690 |
img_commit(argc, argv); |
691 |
} else if (!strcmp(cmd, "convert")) { |
692 |
img_convert(argc, argv); |
693 |
} else if (!strcmp(cmd, "info")) { |
694 |
img_info(argc, argv); |
695 |
} else {
|
696 |
help(); |
697 |
} |
698 |
return 0; |
699 |
} |