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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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#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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} |
34 |
|
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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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|
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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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|
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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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} |
54 |
|
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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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|
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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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} |
81 |
|
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/* strcat and truncate. */
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char *pstrcat(char *buf, int buf_size, const char *s) |
84 |
{ |
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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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} |
91 |
|
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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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} |
103 |
if (ptr)
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*ptr = p; |
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return 1; |
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} |
107 |
|
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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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} |
115 |
|
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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) 2004-2005 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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} |
161 |
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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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static const 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, "%" PRId64, 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]); |
180 |
break;
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} else if (size < (1000 * base) || i == (NB_SUFFIXES - 1)) { |
182 |
snprintf(buf, buf_size, "%" PRId64 "%c", |
183 |
((size + (base >> 1)) / base),
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suffixes[i]); |
185 |
break;
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} |
187 |
base = base * 1024;
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} |
189 |
} |
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} |
191 |
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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) |
195 |
{ |
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int c, i;
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printf("Password: ");
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fflush(stdout); |
199 |
i = 0;
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for(;;) {
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c = getchar(); |
202 |
if (c == '\n') |
203 |
break;
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if (i < (buf_size - 1)) |
205 |
buf[i++] = c; |
206 |
} |
207 |
buf[i] = '\0';
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return 0; |
209 |
} |
210 |
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#else
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#include <termios.h> |
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static struct termios oldtty; |
216 |
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static void term_exit(void) |
218 |
{ |
219 |
tcsetattr (0, TCSANOW, &oldtty);
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} |
221 |
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static void term_init(void) |
223 |
{ |
224 |
struct termios tty;
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tcgetattr (0, &tty);
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oldtty = tty; |
228 |
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tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP |
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|INLCR|IGNCR|ICRNL|IXON); |
231 |
tty.c_oflag |= OPOST; |
232 |
tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN); |
233 |
tty.c_cflag &= ~(CSIZE|PARENB); |
234 |
tty.c_cflag |= CS8; |
235 |
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); |
241 |
} |
242 |
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int read_password(char *buf, int buf_size) |
244 |
{ |
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uint8_t ch; |
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int i, ret;
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247 |
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printf("password: ");
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fflush(stdout); |
250 |
term_init(); |
251 |
i = 0;
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for(;;) {
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ret = read(0, &ch, 1); |
254 |
if (ret == -1) { |
255 |
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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} |
261 |
} else if (ret == 0) { |
262 |
ret = -1;
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break;
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} else {
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if (ch == '\r') { |
266 |
ret = 0;
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break;
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} |
269 |
if (i < (buf_size - 1)) |
270 |
buf[i++] = ch; |
271 |
} |
272 |
} |
273 |
term_exit(); |
274 |
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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279 |
|
280 |
static BlockDriverState *bdrv_new_open(const char *filename, |
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const char *fmt) |
282 |
{ |
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BlockDriverState *bs; |
284 |
BlockDriver *drv; |
285 |
char password[256]; |
286 |
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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); |
292 |
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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} |
297 |
if (bdrv_open2(bs, filename, 0, drv) < 0) { |
298 |
error("Could not open '%s'", filename);
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} |
300 |
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) |
303 |
error("No password given");
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if (bdrv_set_key(bs, password) < 0) |
305 |
error("invalid password");
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} |
307 |
return bs;
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} |
309 |
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310 |
static int img_create(int argc, char **argv) |
311 |
{ |
312 |
int c, ret, encrypted;
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const char *fmt = "raw"; |
314 |
const char *filename; |
315 |
const char *base_filename = NULL; |
316 |
int64_t size; |
317 |
const char *p; |
318 |
BlockDriver *drv; |
319 |
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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) |
324 |
break;
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325 |
switch(c) {
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326 |
case 'h': |
327 |
help(); |
328 |
break;
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329 |
case 'b': |
330 |
base_filename = optarg; |
331 |
break;
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332 |
case 'f': |
333 |
fmt = optarg; |
334 |
break;
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case 'e': |
336 |
encrypted = 1;
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break;
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338 |
} |
339 |
} |
340 |
if (optind >= argc)
|
341 |
help(); |
342 |
filename = argv[optind++]; |
343 |
size = 0;
|
344 |
if (base_filename) {
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BlockDriverState *bs; |
346 |
bs = bdrv_new_open(base_filename, NULL);
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bdrv_get_geometry(bs, &size); |
348 |
size *= 512;
|
349 |
bdrv_delete(bs); |
350 |
} else {
|
351 |
if (optind >= argc)
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help(); |
353 |
p = argv[optind]; |
354 |
size = strtoul(p, (char **)&p, 0); |
355 |
if (*p == 'M') { |
356 |
size *= 1024 * 1024; |
357 |
} else if (*p == 'G') { |
358 |
size *= 1024 * 1024 * 1024; |
359 |
} else if (*p == 'k' || *p == 'K' || *p == '\0') { |
360 |
size *= 1024;
|
361 |
} else {
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362 |
help(); |
363 |
} |
364 |
} |
365 |
drv = bdrv_find_format(fmt); |
366 |
if (!drv)
|
367 |
error("Unknown file format '%s'", fmt);
|
368 |
printf("Formating '%s', fmt=%s",
|
369 |
filename, fmt); |
370 |
if (encrypted)
|
371 |
printf(", encrypted");
|
372 |
if (base_filename) {
|
373 |
printf(", backing_file=%s",
|
374 |
base_filename); |
375 |
} |
376 |
printf(", size=%" PRId64 " kB\n", (int64_t) (size / 1024)); |
377 |
ret = bdrv_create(drv, filename, size / 512, base_filename, encrypted);
|
378 |
if (ret < 0) { |
379 |
if (ret == -ENOTSUP) {
|
380 |
error("Formatting or formatting option not supported for file format '%s'", fmt);
|
381 |
} else {
|
382 |
error("Error while formatting");
|
383 |
} |
384 |
} |
385 |
return 0; |
386 |
} |
387 |
|
388 |
static int img_commit(int argc, char **argv) |
389 |
{ |
390 |
int c, ret;
|
391 |
const char *filename, *fmt; |
392 |
BlockDriver *drv; |
393 |
BlockDriverState *bs; |
394 |
|
395 |
fmt = NULL;
|
396 |
for(;;) {
|
397 |
c = getopt(argc, argv, "f:h");
|
398 |
if (c == -1) |
399 |
break;
|
400 |
switch(c) {
|
401 |
case 'h': |
402 |
help(); |
403 |
break;
|
404 |
case 'f': |
405 |
fmt = optarg; |
406 |
break;
|
407 |
} |
408 |
} |
409 |
if (optind >= argc)
|
410 |
help(); |
411 |
filename = argv[optind++]; |
412 |
|
413 |
bs = bdrv_new("");
|
414 |
if (!bs)
|
415 |
error("Not enough memory");
|
416 |
if (fmt) {
|
417 |
drv = bdrv_find_format(fmt); |
418 |
if (!drv)
|
419 |
error("Unknown file format '%s'", fmt);
|
420 |
} else {
|
421 |
drv = NULL;
|
422 |
} |
423 |
if (bdrv_open2(bs, filename, 0, drv) < 0) { |
424 |
error("Could not open '%s'", filename);
|
425 |
} |
426 |
ret = bdrv_commit(bs); |
427 |
switch(ret) {
|
428 |
case 0: |
429 |
printf("Image committed.\n");
|
430 |
break;
|
431 |
case -ENOENT:
|
432 |
error("No disk inserted");
|
433 |
break;
|
434 |
case -EACCES:
|
435 |
error("Image is read-only");
|
436 |
break;
|
437 |
case -ENOTSUP:
|
438 |
error("Image is already committed");
|
439 |
break;
|
440 |
default:
|
441 |
error("Error while committing image");
|
442 |
break;
|
443 |
} |
444 |
|
445 |
bdrv_delete(bs); |
446 |
return 0; |
447 |
} |
448 |
|
449 |
static int is_not_zero(const uint8_t *sector, int len) |
450 |
{ |
451 |
int i;
|
452 |
len >>= 2;
|
453 |
for(i = 0;i < len; i++) { |
454 |
if (((uint32_t *)sector)[i] != 0) |
455 |
return 1; |
456 |
} |
457 |
return 0; |
458 |
} |
459 |
|
460 |
static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) |
461 |
{ |
462 |
int v, i;
|
463 |
|
464 |
if (n <= 0) { |
465 |
*pnum = 0;
|
466 |
return 0; |
467 |
} |
468 |
v = is_not_zero(buf, 512);
|
469 |
for(i = 1; i < n; i++) { |
470 |
buf += 512;
|
471 |
if (v != is_not_zero(buf, 512)) |
472 |
break;
|
473 |
} |
474 |
*pnum = i; |
475 |
return v;
|
476 |
} |
477 |
|
478 |
#define IO_BUF_SIZE 65536 |
479 |
|
480 |
static int img_convert(int argc, char **argv) |
481 |
{ |
482 |
int c, ret, n, n1, compress, cluster_size, cluster_sectors, encrypt;
|
483 |
const char *filename, *fmt, *out_fmt, *out_filename; |
484 |
BlockDriver *drv; |
485 |
BlockDriverState *bs, *out_bs; |
486 |
int64_t total_sectors, nb_sectors, sector_num; |
487 |
uint8_t buf[IO_BUF_SIZE]; |
488 |
const uint8_t *buf1;
|
489 |
|
490 |
fmt = NULL;
|
491 |
out_fmt = "raw";
|
492 |
compress = 0;
|
493 |
encrypt = 0;
|
494 |
for(;;) {
|
495 |
c = getopt(argc, argv, "f:O:hce");
|
496 |
if (c == -1) |
497 |
break;
|
498 |
switch(c) {
|
499 |
case 'h': |
500 |
help(); |
501 |
break;
|
502 |
case 'f': |
503 |
fmt = optarg; |
504 |
break;
|
505 |
case 'O': |
506 |
out_fmt = optarg; |
507 |
break;
|
508 |
case 'c': |
509 |
compress = 1;
|
510 |
break;
|
511 |
case 'e': |
512 |
encrypt = 1;
|
513 |
break;
|
514 |
} |
515 |
} |
516 |
if (optind >= argc)
|
517 |
help(); |
518 |
filename = argv[optind++]; |
519 |
if (optind >= argc)
|
520 |
help(); |
521 |
out_filename = argv[optind++]; |
522 |
|
523 |
bs = bdrv_new_open(filename, fmt); |
524 |
|
525 |
drv = bdrv_find_format(out_fmt); |
526 |
if (!drv)
|
527 |
error("Unknown file format '%s'", fmt);
|
528 |
if (compress && drv != &bdrv_qcow)
|
529 |
error("Compression not supported for this file format");
|
530 |
if (encrypt && drv != &bdrv_qcow)
|
531 |
error("Encryption not supported for this file format");
|
532 |
if (compress && encrypt)
|
533 |
error("Compression and encryption not supported at the same time");
|
534 |
bdrv_get_geometry(bs, &total_sectors); |
535 |
ret = bdrv_create(drv, out_filename, total_sectors, NULL, encrypt);
|
536 |
if (ret < 0) { |
537 |
if (ret == -ENOTSUP) {
|
538 |
error("Formatting not supported for file format '%s'", fmt);
|
539 |
} else {
|
540 |
error("Error while formatting '%s'", out_filename);
|
541 |
} |
542 |
} |
543 |
|
544 |
out_bs = bdrv_new_open(out_filename, out_fmt); |
545 |
|
546 |
if (compress) {
|
547 |
cluster_size = qcow_get_cluster_size(out_bs); |
548 |
if (cluster_size <= 0 || cluster_size > IO_BUF_SIZE) |
549 |
error("invalid cluster size");
|
550 |
cluster_sectors = cluster_size >> 9;
|
551 |
sector_num = 0;
|
552 |
for(;;) {
|
553 |
nb_sectors = total_sectors - sector_num; |
554 |
if (nb_sectors <= 0) |
555 |
break;
|
556 |
if (nb_sectors >= cluster_sectors)
|
557 |
n = cluster_sectors; |
558 |
else
|
559 |
n = nb_sectors; |
560 |
if (bdrv_read(bs, sector_num, buf, n) < 0) |
561 |
error("error while reading");
|
562 |
if (n < cluster_sectors)
|
563 |
memset(buf + n * 512, 0, cluster_size - n * 512); |
564 |
if (is_not_zero(buf, cluster_size)) {
|
565 |
if (qcow_compress_cluster(out_bs, sector_num, buf) != 0) |
566 |
error("error while compressing sector %" PRId64,
|
567 |
sector_num); |
568 |
} |
569 |
sector_num += n; |
570 |
} |
571 |
} else {
|
572 |
sector_num = 0;
|
573 |
for(;;) {
|
574 |
nb_sectors = total_sectors - sector_num; |
575 |
if (nb_sectors <= 0) |
576 |
break;
|
577 |
if (nb_sectors >= (IO_BUF_SIZE / 512)) |
578 |
n = (IO_BUF_SIZE / 512);
|
579 |
else
|
580 |
n = nb_sectors; |
581 |
if (bdrv_read(bs, sector_num, buf, n) < 0) |
582 |
error("error while reading");
|
583 |
/* NOTE: at the same time we convert, we do not write zero
|
584 |
sectors to have a chance to compress the image. Ideally, we
|
585 |
should add a specific call to have the info to go faster */
|
586 |
buf1 = buf; |
587 |
while (n > 0) { |
588 |
if (is_allocated_sectors(buf1, n, &n1)) {
|
589 |
if (bdrv_write(out_bs, sector_num, buf1, n1) < 0) |
590 |
error("error while writing");
|
591 |
} |
592 |
sector_num += n1; |
593 |
n -= n1; |
594 |
buf1 += n1 * 512;
|
595 |
} |
596 |
} |
597 |
} |
598 |
bdrv_delete(out_bs); |
599 |
bdrv_delete(bs); |
600 |
return 0; |
601 |
} |
602 |
|
603 |
#ifdef _WIN32
|
604 |
static int64_t get_allocated_file_size(const char *filename) |
605 |
{ |
606 |
typedef DWORD (WINAPI * get_compressed_t)(const char *filename, DWORD *high); |
607 |
get_compressed_t get_compressed; |
608 |
struct _stati64 st;
|
609 |
|
610 |
/* WinNT support GetCompressedFileSize to determine allocate size */
|
611 |
get_compressed = (get_compressed_t) GetProcAddress(GetModuleHandle("kernel32"), "GetCompressedFileSizeA"); |
612 |
if (get_compressed) {
|
613 |
DWORD high, low; |
614 |
low = get_compressed(filename, &high); |
615 |
if (low != 0xFFFFFFFFlu || GetLastError() == NO_ERROR) |
616 |
return (((int64_t) high) << 32) + low; |
617 |
} |
618 |
|
619 |
if (_stati64(filename, &st) < 0) |
620 |
return -1; |
621 |
return st.st_size;
|
622 |
} |
623 |
#else
|
624 |
static int64_t get_allocated_file_size(const char *filename) |
625 |
{ |
626 |
struct stat st;
|
627 |
if (stat(filename, &st) < 0) |
628 |
return -1; |
629 |
return (int64_t)st.st_blocks * 512; |
630 |
} |
631 |
#endif
|
632 |
|
633 |
static int img_info(int argc, char **argv) |
634 |
{ |
635 |
int c;
|
636 |
const char *filename, *fmt; |
637 |
BlockDriver *drv; |
638 |
BlockDriverState *bs; |
639 |
char fmt_name[128], size_buf[128], dsize_buf[128]; |
640 |
int64_t total_sectors, allocated_size; |
641 |
|
642 |
fmt = NULL;
|
643 |
for(;;) {
|
644 |
c = getopt(argc, argv, "f:h");
|
645 |
if (c == -1) |
646 |
break;
|
647 |
switch(c) {
|
648 |
case 'h': |
649 |
help(); |
650 |
break;
|
651 |
case 'f': |
652 |
fmt = optarg; |
653 |
break;
|
654 |
} |
655 |
} |
656 |
if (optind >= argc)
|
657 |
help(); |
658 |
filename = argv[optind++]; |
659 |
|
660 |
bs = bdrv_new("");
|
661 |
if (!bs)
|
662 |
error("Not enough memory");
|
663 |
if (fmt) {
|
664 |
drv = bdrv_find_format(fmt); |
665 |
if (!drv)
|
666 |
error("Unknown file format '%s'", fmt);
|
667 |
} else {
|
668 |
drv = NULL;
|
669 |
} |
670 |
if (bdrv_open2(bs, filename, 0, drv) < 0) { |
671 |
error("Could not open '%s'", filename);
|
672 |
} |
673 |
bdrv_get_format(bs, fmt_name, sizeof(fmt_name));
|
674 |
bdrv_get_geometry(bs, &total_sectors); |
675 |
get_human_readable_size(size_buf, sizeof(size_buf), total_sectors * 512); |
676 |
allocated_size = get_allocated_file_size(filename); |
677 |
if (allocated_size < 0) |
678 |
sprintf(dsize_buf, "unavailable");
|
679 |
else
|
680 |
get_human_readable_size(dsize_buf, sizeof(dsize_buf),
|
681 |
allocated_size); |
682 |
printf("image: %s\n"
|
683 |
"file format: %s\n"
|
684 |
"virtual size: %s (%" PRId64 " bytes)\n" |
685 |
"disk size: %s\n",
|
686 |
filename, fmt_name, size_buf, |
687 |
(total_sectors * 512),
|
688 |
dsize_buf); |
689 |
if (bdrv_is_encrypted(bs))
|
690 |
printf("encrypted: yes\n");
|
691 |
bdrv_delete(bs); |
692 |
return 0; |
693 |
} |
694 |
|
695 |
int main(int argc, char **argv) |
696 |
{ |
697 |
const char *cmd; |
698 |
|
699 |
bdrv_init(); |
700 |
if (argc < 2) |
701 |
help(); |
702 |
cmd = argv[1];
|
703 |
optind++; |
704 |
if (!strcmp(cmd, "create")) { |
705 |
img_create(argc, argv); |
706 |
} else if (!strcmp(cmd, "commit")) { |
707 |
img_commit(argc, argv); |
708 |
} else if (!strcmp(cmd, "convert")) { |
709 |
img_convert(argc, argv); |
710 |
} else if (!strcmp(cmd, "info")) { |
711 |
img_info(argc, argv); |
712 |
} else {
|
713 |
help(); |
714 |
} |
715 |
return 0; |
716 |
} |