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/*
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* create a COW disk image
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*
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* Copyright (c) 2003 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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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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|
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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 pstrcpy(char *buf, int buf_size, const char *str) |
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{ |
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int c;
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char *q = buf;
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if (buf_size <= 0) |
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return;
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for(;;) {
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c = *str++; |
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if (c == 0 || q >= buf + buf_size - 1) |
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break;
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*q++ = c; |
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} |
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*q = '\0';
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} |
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|
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/* strcat and truncate. */
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char *pstrcat(char *buf, int buf_size, const char *s) |
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{ |
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int len;
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len = strlen(buf); |
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if (len < buf_size)
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pstrcpy(buf + len, buf_size - len, s); |
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return buf;
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} |
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|
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int strstart(const char *str, const char *val, const char **ptr) |
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{ |
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const char *p, *q; |
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p = str; |
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q = val; |
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while (*q != '\0') { |
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if (*p != *q)
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return 0; |
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p++; |
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q++; |
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} |
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if (ptr)
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*ptr = p; |
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return 1; |
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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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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 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] [-b base_image] [-f fmt] filename [size]\n"
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" commit [-f fmt] filename\n"
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" convert [-c] [-e] [-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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); |
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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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#define NB_SUFFIXES 4 |
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static void get_human_readable_size(char *buf, int buf_size, int64_t size) |
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{ |
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char suffixes[NB_SUFFIXES] = "KMGT"; |
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int64_t base; |
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int i;
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if (size <= 999) { |
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snprintf(buf, buf_size, "%lld", size);
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} else {
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base = 1024;
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for(i = 0; i < NB_SUFFIXES; i++) { |
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if (size < (10 * base)) { |
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snprintf(buf, buf_size, "%0.1f%c",
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(double)size / base,
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suffixes[i]); |
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break;
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} else if (size < (1000 * base) || i == (NB_SUFFIXES - 1)) { |
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snprintf(buf, buf_size, "%lld%c",
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(size + (base >> 1)) / base,
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suffixes[i]); |
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break;
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} |
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base = base * 1024;
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} |
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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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#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); |
250 |
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) { |
258 |
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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|
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static BlockDriverState *bdrv_new_open(const char *filename, |
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const char *fmt) |
278 |
{ |
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BlockDriverState *bs; |
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BlockDriver *drv; |
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char password[256]; |
282 |
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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); |
288 |
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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} |
293 |
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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} |
305 |
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static int img_create(int argc, char **argv) |
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{ |
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int c, ret, encrypted;
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const char *fmt = "raw"; |
310 |
const char *filename; |
311 |
const char *base_filename = NULL; |
312 |
int64_t size; |
313 |
const char *p; |
314 |
BlockDriver *drv; |
315 |
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encrypted = 0;
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for(;;) {
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c = getopt(argc, argv, "b:f:he");
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if (c == -1) |
320 |
break;
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switch(c) {
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case 'h': |
323 |
help(); |
324 |
break;
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case 'b': |
326 |
base_filename = optarg; |
327 |
break;
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328 |
case 'f': |
329 |
fmt = optarg; |
330 |
break;
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331 |
case 'e': |
332 |
encrypted = 1;
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break;
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} |
335 |
} |
336 |
if (optind >= argc)
|
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help(); |
338 |
filename = argv[optind++]; |
339 |
size = 0;
|
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if (base_filename) {
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BlockDriverState *bs; |
342 |
bs = bdrv_new_open(base_filename, NULL);
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bdrv_get_geometry(bs, &size); |
344 |
size *= 512;
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bdrv_delete(bs); |
346 |
} else {
|
347 |
if (optind >= argc)
|
348 |
help(); |
349 |
p = argv[optind]; |
350 |
size = strtoul(p, (char **)&p, 0); |
351 |
if (*p == 'M') { |
352 |
size *= 1024 * 1024; |
353 |
} else if (*p == 'G') { |
354 |
size *= 1024 * 1024 * 1024; |
355 |
} else if (*p == 'k' || *p == 'K' || *p == '\0') { |
356 |
size *= 1024;
|
357 |
} else {
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help(); |
359 |
} |
360 |
} |
361 |
drv = bdrv_find_format(fmt); |
362 |
if (!drv)
|
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error("Unknown file format '%s'", fmt);
|
364 |
printf("Formating '%s', fmt=%s",
|
365 |
filename, fmt); |
366 |
if (encrypted)
|
367 |
printf(", encrypted");
|
368 |
if (base_filename) {
|
369 |
printf(", backing_file=%s",
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370 |
base_filename); |
371 |
} |
372 |
printf(", size=%lld kB\n", size / 1024); |
373 |
ret = bdrv_create(drv, filename, size / 512, base_filename, encrypted);
|
374 |
if (ret < 0) { |
375 |
if (ret == -ENOTSUP) {
|
376 |
error("Formatting or formatting option not supported for file format '%s'", fmt);
|
377 |
} else {
|
378 |
error("Error while formatting");
|
379 |
} |
380 |
} |
381 |
return 0; |
382 |
} |
383 |
|
384 |
static int img_commit(int argc, char **argv) |
385 |
{ |
386 |
int c, ret;
|
387 |
const char *filename, *fmt; |
388 |
BlockDriver *drv; |
389 |
BlockDriverState *bs; |
390 |
|
391 |
fmt = NULL;
|
392 |
for(;;) {
|
393 |
c = getopt(argc, argv, "f:h");
|
394 |
if (c == -1) |
395 |
break;
|
396 |
switch(c) {
|
397 |
case 'h': |
398 |
help(); |
399 |
break;
|
400 |
case 'f': |
401 |
fmt = optarg; |
402 |
break;
|
403 |
} |
404 |
} |
405 |
if (optind >= argc)
|
406 |
help(); |
407 |
filename = argv[optind++]; |
408 |
|
409 |
bs = bdrv_new("");
|
410 |
if (!bs)
|
411 |
error("Not enough memory");
|
412 |
if (fmt) {
|
413 |
drv = bdrv_find_format(fmt); |
414 |
if (!drv)
|
415 |
error("Unknown file format '%s'", fmt);
|
416 |
} else {
|
417 |
drv = NULL;
|
418 |
} |
419 |
if (bdrv_open2(bs, filename, 0, drv) < 0) { |
420 |
error("Could not open '%s'", filename);
|
421 |
} |
422 |
ret = bdrv_commit(bs); |
423 |
switch(ret) {
|
424 |
case 0: |
425 |
printf("Image committed.\n");
|
426 |
break;
|
427 |
case -ENOENT:
|
428 |
error("No disk inserted");
|
429 |
break;
|
430 |
case -EACCES:
|
431 |
error("Image is read-only");
|
432 |
break;
|
433 |
case -ENOTSUP:
|
434 |
error("Image is already committed");
|
435 |
break;
|
436 |
default:
|
437 |
error("Error while committing image");
|
438 |
break;
|
439 |
} |
440 |
|
441 |
bdrv_delete(bs); |
442 |
return 0; |
443 |
} |
444 |
|
445 |
static int is_not_zero(const uint8_t *sector, int len) |
446 |
{ |
447 |
int i;
|
448 |
len >>= 2;
|
449 |
for(i = 0;i < len; i++) { |
450 |
if (((uint32_t *)sector)[i] != 0) |
451 |
return 1; |
452 |
} |
453 |
return 0; |
454 |
} |
455 |
|
456 |
static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) |
457 |
{ |
458 |
int v, i;
|
459 |
|
460 |
if (n <= 0) { |
461 |
*pnum = 0;
|
462 |
return 0; |
463 |
} |
464 |
v = is_not_zero(buf, 512);
|
465 |
for(i = 1; i < n; i++) { |
466 |
buf += 512;
|
467 |
if (v != is_not_zero(buf, 512)) |
468 |
break;
|
469 |
} |
470 |
*pnum = i; |
471 |
return v;
|
472 |
} |
473 |
|
474 |
#define IO_BUF_SIZE 65536 |
475 |
|
476 |
static int img_convert(int argc, char **argv) |
477 |
{ |
478 |
int c, ret, n, n1, compress, cluster_size, cluster_sectors, encrypt;
|
479 |
const char *filename, *fmt, *out_fmt, *out_filename; |
480 |
BlockDriver *drv; |
481 |
BlockDriverState *bs, *out_bs; |
482 |
int64_t total_sectors, nb_sectors, sector_num; |
483 |
uint8_t buf[IO_BUF_SIZE]; |
484 |
const uint8_t *buf1;
|
485 |
|
486 |
fmt = NULL;
|
487 |
out_fmt = "raw";
|
488 |
compress = 0;
|
489 |
encrypt = 0;
|
490 |
for(;;) {
|
491 |
c = getopt(argc, argv, "f:O:hce");
|
492 |
if (c == -1) |
493 |
break;
|
494 |
switch(c) {
|
495 |
case 'h': |
496 |
help(); |
497 |
break;
|
498 |
case 'f': |
499 |
fmt = optarg; |
500 |
break;
|
501 |
case 'O': |
502 |
out_fmt = optarg; |
503 |
break;
|
504 |
case 'c': |
505 |
compress = 1;
|
506 |
break;
|
507 |
case 'e': |
508 |
encrypt = 1;
|
509 |
break;
|
510 |
} |
511 |
} |
512 |
if (optind >= argc)
|
513 |
help(); |
514 |
filename = argv[optind++]; |
515 |
if (optind >= argc)
|
516 |
help(); |
517 |
out_filename = argv[optind++]; |
518 |
|
519 |
bs = bdrv_new_open(filename, fmt); |
520 |
|
521 |
drv = bdrv_find_format(out_fmt); |
522 |
if (!drv)
|
523 |
error("Unknown file format '%s'", fmt);
|
524 |
if (compress && drv != &bdrv_qcow)
|
525 |
error("Compression not supported for this file format");
|
526 |
if (encrypt && drv != &bdrv_qcow)
|
527 |
error("Encryption not supported for this file format");
|
528 |
if (compress && encrypt)
|
529 |
error("Compression and encryption not supported at the same time");
|
530 |
bdrv_get_geometry(bs, &total_sectors); |
531 |
ret = bdrv_create(drv, out_filename, total_sectors, NULL, encrypt);
|
532 |
if (ret < 0) { |
533 |
if (ret == -ENOTSUP) {
|
534 |
error("Formatting not supported for file format '%s'", fmt);
|
535 |
} else {
|
536 |
error("Error while formatting '%s'", out_filename);
|
537 |
} |
538 |
} |
539 |
|
540 |
out_bs = bdrv_new_open(out_filename, out_fmt); |
541 |
|
542 |
if (compress) {
|
543 |
cluster_size = qcow_get_cluster_size(out_bs); |
544 |
if (cluster_size <= 0 || cluster_size > IO_BUF_SIZE) |
545 |
error("invalid cluster size");
|
546 |
cluster_sectors = cluster_size >> 9;
|
547 |
sector_num = 0;
|
548 |
for(;;) {
|
549 |
nb_sectors = total_sectors - sector_num; |
550 |
if (nb_sectors <= 0) |
551 |
break;
|
552 |
if (nb_sectors >= cluster_sectors)
|
553 |
n = cluster_sectors; |
554 |
else
|
555 |
n = nb_sectors; |
556 |
if (bdrv_read(bs, sector_num, buf, n) < 0) |
557 |
error("error while reading");
|
558 |
if (n < cluster_sectors)
|
559 |
memset(buf + n * 512, 0, cluster_size - n * 512); |
560 |
if (is_not_zero(buf, cluster_size)) {
|
561 |
if (qcow_compress_cluster(out_bs, sector_num, buf) != 0) |
562 |
error("error while compressing sector %lld", sector_num);
|
563 |
} |
564 |
sector_num += n; |
565 |
} |
566 |
} else {
|
567 |
sector_num = 0;
|
568 |
for(;;) {
|
569 |
nb_sectors = total_sectors - sector_num; |
570 |
if (nb_sectors <= 0) |
571 |
break;
|
572 |
if (nb_sectors >= (IO_BUF_SIZE / 512)) |
573 |
n = (IO_BUF_SIZE / 512);
|
574 |
else
|
575 |
n = nb_sectors; |
576 |
if (bdrv_read(bs, sector_num, buf, n) < 0) |
577 |
error("error while reading");
|
578 |
/* NOTE: at the same time we convert, we do not write zero
|
579 |
sectors to have a chance to compress the image. Ideally, we
|
580 |
should add a specific call to have the info to go faster */
|
581 |
buf1 = buf; |
582 |
while (n > 0) { |
583 |
if (is_allocated_sectors(buf1, n, &n1)) {
|
584 |
if (bdrv_write(out_bs, sector_num, buf1, n1) < 0) |
585 |
error("error while writing");
|
586 |
} |
587 |
sector_num += n1; |
588 |
n -= n1; |
589 |
buf1 += n1 * 512;
|
590 |
} |
591 |
} |
592 |
} |
593 |
bdrv_delete(out_bs); |
594 |
bdrv_delete(bs); |
595 |
return 0; |
596 |
} |
597 |
|
598 |
#ifdef _WIN32
|
599 |
static int64_t get_allocated_file_size(const char *filename) |
600 |
{ |
601 |
struct _stati64 st;
|
602 |
if (_stati64(filename, &st) < 0) |
603 |
return -1; |
604 |
return st.st_size;
|
605 |
} |
606 |
#else
|
607 |
static int64_t get_allocated_file_size(const char *filename) |
608 |
{ |
609 |
struct stat st;
|
610 |
if (stat(filename, &st) < 0) |
611 |
return -1; |
612 |
return (int64_t)st.st_blocks * 512; |
613 |
} |
614 |
#endif
|
615 |
|
616 |
static int img_info(int argc, char **argv) |
617 |
{ |
618 |
int c;
|
619 |
const char *filename, *fmt; |
620 |
BlockDriver *drv; |
621 |
BlockDriverState *bs; |
622 |
char fmt_name[128], size_buf[128], dsize_buf[128]; |
623 |
int64_t total_sectors, allocated_size; |
624 |
|
625 |
fmt = NULL;
|
626 |
for(;;) {
|
627 |
c = getopt(argc, argv, "f:h");
|
628 |
if (c == -1) |
629 |
break;
|
630 |
switch(c) {
|
631 |
case 'h': |
632 |
help(); |
633 |
break;
|
634 |
case 'f': |
635 |
fmt = optarg; |
636 |
break;
|
637 |
} |
638 |
} |
639 |
if (optind >= argc)
|
640 |
help(); |
641 |
filename = argv[optind++]; |
642 |
|
643 |
bs = bdrv_new("");
|
644 |
if (!bs)
|
645 |
error("Not enough memory");
|
646 |
if (fmt) {
|
647 |
drv = bdrv_find_format(fmt); |
648 |
if (!drv)
|
649 |
error("Unknown file format '%s'", fmt);
|
650 |
} else {
|
651 |
drv = NULL;
|
652 |
} |
653 |
if (bdrv_open2(bs, filename, 0, drv) < 0) { |
654 |
error("Could not open '%s'", filename);
|
655 |
} |
656 |
bdrv_get_format(bs, fmt_name, sizeof(fmt_name));
|
657 |
bdrv_get_geometry(bs, &total_sectors); |
658 |
get_human_readable_size(size_buf, sizeof(size_buf), total_sectors * 512); |
659 |
allocated_size = get_allocated_file_size(filename); |
660 |
if (allocated_size < 0) |
661 |
error("Could not get file size '%s'", filename);
|
662 |
get_human_readable_size(dsize_buf, sizeof(dsize_buf),
|
663 |
allocated_size); |
664 |
printf("image: %s\n"
|
665 |
"file format: %s\n"
|
666 |
"virtual size: %s (%lld bytes)\n"
|
667 |
"disk size: %s\n",
|
668 |
filename, fmt_name, size_buf, |
669 |
total_sectors * 512,
|
670 |
dsize_buf); |
671 |
if (bdrv_is_encrypted(bs))
|
672 |
printf("encrypted: yes\n");
|
673 |
bdrv_delete(bs); |
674 |
return 0; |
675 |
} |
676 |
|
677 |
int main(int argc, char **argv) |
678 |
{ |
679 |
const char *cmd; |
680 |
|
681 |
bdrv_init(); |
682 |
if (argc < 2) |
683 |
help(); |
684 |
cmd = argv[1];
|
685 |
optind++; |
686 |
if (!strcmp(cmd, "create")) { |
687 |
img_create(argc, argv); |
688 |
} else if (!strcmp(cmd, "commit")) { |
689 |
img_commit(argc, argv); |
690 |
} else if (!strcmp(cmd, "convert")) { |
691 |
img_convert(argc, argv); |
692 |
} else if (!strcmp(cmd, "info")) { |
693 |
img_info(argc, argv); |
694 |
} else {
|
695 |
help(); |
696 |
} |
697 |
return 0; |
698 |
} |