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Commit | Line | Data |
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fc01f7e7 FB |
1 | /* |
2 | * QEMU System Emulator block driver | |
5fafdf24 | 3 | * |
fc01f7e7 | 4 | * Copyright (c) 2003 Fabrice Bellard |
5fafdf24 | 5 | * |
fc01f7e7 FB |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
22 | * THE SOFTWARE. | |
23 | */ | |
3990d09a BS |
24 | #include "config-host.h" |
25 | #ifdef _BSD | |
26 | /* include native header before sys-queue.h */ | |
27 | #include <sys/queue.h> | |
28 | #endif | |
29 | ||
faf07963 | 30 | #include "qemu-common.h" |
87ecb68b | 31 | #include "console.h" |
ea2384d3 | 32 | #include "block_int.h" |
fc01f7e7 | 33 | |
7674e7bf FB |
34 | #ifdef _BSD |
35 | #include <sys/types.h> | |
36 | #include <sys/stat.h> | |
37 | #include <sys/ioctl.h> | |
7674e7bf FB |
38 | #include <sys/disk.h> |
39 | #endif | |
40 | ||
83f64091 FB |
41 | #define SECTOR_BITS 9 |
42 | #define SECTOR_SIZE (1 << SECTOR_BITS) | |
43 | ||
90765429 FB |
44 | typedef struct BlockDriverAIOCBSync { |
45 | BlockDriverAIOCB common; | |
46 | QEMUBH *bh; | |
47 | int ret; | |
48 | } BlockDriverAIOCBSync; | |
49 | ||
ce1a14dc PB |
50 | static BlockDriverAIOCB *bdrv_aio_read_em(BlockDriverState *bs, |
51 | int64_t sector_num, uint8_t *buf, int nb_sectors, | |
52 | BlockDriverCompletionFunc *cb, void *opaque); | |
53 | static BlockDriverAIOCB *bdrv_aio_write_em(BlockDriverState *bs, | |
54 | int64_t sector_num, const uint8_t *buf, int nb_sectors, | |
55 | BlockDriverCompletionFunc *cb, void *opaque); | |
83f64091 | 56 | static void bdrv_aio_cancel_em(BlockDriverAIOCB *acb); |
5fafdf24 | 57 | static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
83f64091 FB |
58 | uint8_t *buf, int nb_sectors); |
59 | static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, | |
60 | const uint8_t *buf, int nb_sectors); | |
ec530c81 | 61 | |
7ee930d0 BS |
62 | BlockDriverState *bdrv_first; |
63 | ||
ea2384d3 FB |
64 | static BlockDriver *first_drv; |
65 | ||
83f64091 | 66 | int path_is_absolute(const char *path) |
3b0d4f61 | 67 | { |
83f64091 | 68 | const char *p; |
21664424 FB |
69 | #ifdef _WIN32 |
70 | /* specific case for names like: "\\.\d:" */ | |
71 | if (*path == '/' || *path == '\\') | |
72 | return 1; | |
73 | #endif | |
83f64091 FB |
74 | p = strchr(path, ':'); |
75 | if (p) | |
76 | p++; | |
77 | else | |
78 | p = path; | |
3b9f94e1 FB |
79 | #ifdef _WIN32 |
80 | return (*p == '/' || *p == '\\'); | |
81 | #else | |
82 | return (*p == '/'); | |
83 | #endif | |
3b0d4f61 FB |
84 | } |
85 | ||
83f64091 FB |
86 | /* if filename is absolute, just copy it to dest. Otherwise, build a |
87 | path to it by considering it is relative to base_path. URL are | |
88 | supported. */ | |
89 | void path_combine(char *dest, int dest_size, | |
90 | const char *base_path, | |
91 | const char *filename) | |
3b0d4f61 | 92 | { |
83f64091 FB |
93 | const char *p, *p1; |
94 | int len; | |
95 | ||
96 | if (dest_size <= 0) | |
97 | return; | |
98 | if (path_is_absolute(filename)) { | |
99 | pstrcpy(dest, dest_size, filename); | |
100 | } else { | |
101 | p = strchr(base_path, ':'); | |
102 | if (p) | |
103 | p++; | |
104 | else | |
105 | p = base_path; | |
3b9f94e1 FB |
106 | p1 = strrchr(base_path, '/'); |
107 | #ifdef _WIN32 | |
108 | { | |
109 | const char *p2; | |
110 | p2 = strrchr(base_path, '\\'); | |
111 | if (!p1 || p2 > p1) | |
112 | p1 = p2; | |
113 | } | |
114 | #endif | |
83f64091 FB |
115 | if (p1) |
116 | p1++; | |
117 | else | |
118 | p1 = base_path; | |
119 | if (p1 > p) | |
120 | p = p1; | |
121 | len = p - base_path; | |
122 | if (len > dest_size - 1) | |
123 | len = dest_size - 1; | |
124 | memcpy(dest, base_path, len); | |
125 | dest[len] = '\0'; | |
126 | pstrcat(dest, dest_size, filename); | |
3b0d4f61 | 127 | } |
3b0d4f61 FB |
128 | } |
129 | ||
3b0d4f61 | 130 | |
9596ebb7 | 131 | static void bdrv_register(BlockDriver *bdrv) |
ea2384d3 | 132 | { |
ce1a14dc | 133 | if (!bdrv->bdrv_aio_read) { |
83f64091 | 134 | /* add AIO emulation layer */ |
83f64091 FB |
135 | bdrv->bdrv_aio_read = bdrv_aio_read_em; |
136 | bdrv->bdrv_aio_write = bdrv_aio_write_em; | |
137 | bdrv->bdrv_aio_cancel = bdrv_aio_cancel_em; | |
90765429 | 138 | bdrv->aiocb_size = sizeof(BlockDriverAIOCBSync); |
83f64091 FB |
139 | } else if (!bdrv->bdrv_read && !bdrv->bdrv_pread) { |
140 | /* add synchronous IO emulation layer */ | |
141 | bdrv->bdrv_read = bdrv_read_em; | |
142 | bdrv->bdrv_write = bdrv_write_em; | |
143 | } | |
ea2384d3 FB |
144 | bdrv->next = first_drv; |
145 | first_drv = bdrv; | |
146 | } | |
b338082b FB |
147 | |
148 | /* create a new block device (by default it is empty) */ | |
149 | BlockDriverState *bdrv_new(const char *device_name) | |
150 | { | |
151 | BlockDriverState **pbs, *bs; | |
152 | ||
153 | bs = qemu_mallocz(sizeof(BlockDriverState)); | |
154 | if(!bs) | |
155 | return NULL; | |
156 | pstrcpy(bs->device_name, sizeof(bs->device_name), device_name); | |
ea2384d3 FB |
157 | if (device_name[0] != '\0') { |
158 | /* insert at the end */ | |
159 | pbs = &bdrv_first; | |
160 | while (*pbs != NULL) | |
161 | pbs = &(*pbs)->next; | |
162 | *pbs = bs; | |
163 | } | |
b338082b FB |
164 | return bs; |
165 | } | |
166 | ||
ea2384d3 FB |
167 | BlockDriver *bdrv_find_format(const char *format_name) |
168 | { | |
169 | BlockDriver *drv1; | |
170 | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { | |
171 | if (!strcmp(drv1->format_name, format_name)) | |
172 | return drv1; | |
173 | } | |
174 | return NULL; | |
175 | } | |
176 | ||
5fafdf24 | 177 | int bdrv_create(BlockDriver *drv, |
ea2384d3 FB |
178 | const char *filename, int64_t size_in_sectors, |
179 | const char *backing_file, int flags) | |
180 | { | |
181 | if (!drv->bdrv_create) | |
182 | return -ENOTSUP; | |
183 | return drv->bdrv_create(filename, size_in_sectors, backing_file, flags); | |
184 | } | |
185 | ||
d5249393 | 186 | #ifdef _WIN32 |
95389c86 | 187 | void get_tmp_filename(char *filename, int size) |
d5249393 | 188 | { |
3b9f94e1 | 189 | char temp_dir[MAX_PATH]; |
3b46e624 | 190 | |
3b9f94e1 FB |
191 | GetTempPath(MAX_PATH, temp_dir); |
192 | GetTempFileName(temp_dir, "qem", 0, filename); | |
d5249393 FB |
193 | } |
194 | #else | |
95389c86 | 195 | void get_tmp_filename(char *filename, int size) |
fc01f7e7 | 196 | { |
67b915a5 | 197 | int fd; |
7ccfb2eb | 198 | const char *tmpdir; |
d5249393 | 199 | /* XXX: race condition possible */ |
0badc1ee AJ |
200 | tmpdir = getenv("TMPDIR"); |
201 | if (!tmpdir) | |
202 | tmpdir = "/tmp"; | |
203 | snprintf(filename, size, "%s/vl.XXXXXX", tmpdir); | |
ea2384d3 FB |
204 | fd = mkstemp(filename); |
205 | close(fd); | |
206 | } | |
d5249393 | 207 | #endif |
fc01f7e7 | 208 | |
19cb3738 | 209 | #ifdef _WIN32 |
f45512fe FB |
210 | static int is_windows_drive_prefix(const char *filename) |
211 | { | |
212 | return (((filename[0] >= 'a' && filename[0] <= 'z') || | |
213 | (filename[0] >= 'A' && filename[0] <= 'Z')) && | |
214 | filename[1] == ':'); | |
215 | } | |
3b46e624 | 216 | |
19cb3738 FB |
217 | static int is_windows_drive(const char *filename) |
218 | { | |
5fafdf24 | 219 | if (is_windows_drive_prefix(filename) && |
f45512fe | 220 | filename[2] == '\0') |
19cb3738 FB |
221 | return 1; |
222 | if (strstart(filename, "\\\\.\\", NULL) || | |
223 | strstart(filename, "//./", NULL)) | |
224 | return 1; | |
225 | return 0; | |
226 | } | |
227 | #endif | |
228 | ||
83f64091 FB |
229 | static BlockDriver *find_protocol(const char *filename) |
230 | { | |
231 | BlockDriver *drv1; | |
232 | char protocol[128]; | |
233 | int len; | |
234 | const char *p; | |
19cb3738 FB |
235 | |
236 | #ifdef _WIN32 | |
f45512fe FB |
237 | if (is_windows_drive(filename) || |
238 | is_windows_drive_prefix(filename)) | |
19cb3738 FB |
239 | return &bdrv_raw; |
240 | #endif | |
83f64091 FB |
241 | p = strchr(filename, ':'); |
242 | if (!p) | |
243 | return &bdrv_raw; | |
244 | len = p - filename; | |
245 | if (len > sizeof(protocol) - 1) | |
246 | len = sizeof(protocol) - 1; | |
83f64091 FB |
247 | memcpy(protocol, filename, len); |
248 | protocol[len] = '\0'; | |
249 | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { | |
5fafdf24 | 250 | if (drv1->protocol_name && |
83f64091 FB |
251 | !strcmp(drv1->protocol_name, protocol)) |
252 | return drv1; | |
253 | } | |
254 | return NULL; | |
255 | } | |
256 | ||
7674e7bf FB |
257 | /* XXX: force raw format if block or character device ? It would |
258 | simplify the BSD case */ | |
ea2384d3 FB |
259 | static BlockDriver *find_image_format(const char *filename) |
260 | { | |
83f64091 | 261 | int ret, score, score_max; |
ea2384d3 | 262 | BlockDriver *drv1, *drv; |
83f64091 FB |
263 | uint8_t buf[2048]; |
264 | BlockDriverState *bs; | |
3b46e624 | 265 | |
19cb3738 FB |
266 | /* detect host devices. By convention, /dev/cdrom[N] is always |
267 | recognized as a host CDROM */ | |
268 | if (strstart(filename, "/dev/cdrom", NULL)) | |
269 | return &bdrv_host_device; | |
270 | #ifdef _WIN32 | |
271 | if (is_windows_drive(filename)) | |
272 | return &bdrv_host_device; | |
273 | #else | |
274 | { | |
275 | struct stat st; | |
5fafdf24 | 276 | if (stat(filename, &st) >= 0 && |
19cb3738 FB |
277 | (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) { |
278 | return &bdrv_host_device; | |
279 | } | |
280 | } | |
281 | #endif | |
3b46e624 | 282 | |
83f64091 | 283 | drv = find_protocol(filename); |
19cb3738 | 284 | /* no need to test disk image formats for vvfat */ |
83f64091 FB |
285 | if (drv == &bdrv_vvfat) |
286 | return drv; | |
19cb3738 | 287 | |
83f64091 FB |
288 | ret = bdrv_file_open(&bs, filename, BDRV_O_RDONLY); |
289 | if (ret < 0) | |
290 | return NULL; | |
291 | ret = bdrv_pread(bs, 0, buf, sizeof(buf)); | |
292 | bdrv_delete(bs); | |
293 | if (ret < 0) { | |
294 | return NULL; | |
295 | } | |
296 | ||
ea2384d3 FB |
297 | score_max = 0; |
298 | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { | |
83f64091 FB |
299 | if (drv1->bdrv_probe) { |
300 | score = drv1->bdrv_probe(buf, ret, filename); | |
301 | if (score > score_max) { | |
302 | score_max = score; | |
303 | drv = drv1; | |
304 | } | |
0849bf08 | 305 | } |
fc01f7e7 | 306 | } |
ea2384d3 FB |
307 | return drv; |
308 | } | |
309 | ||
83f64091 | 310 | int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags) |
ea2384d3 | 311 | { |
83f64091 FB |
312 | BlockDriverState *bs; |
313 | int ret; | |
314 | ||
315 | bs = bdrv_new(""); | |
316 | if (!bs) | |
317 | return -ENOMEM; | |
318 | ret = bdrv_open2(bs, filename, flags | BDRV_O_FILE, NULL); | |
319 | if (ret < 0) { | |
320 | bdrv_delete(bs); | |
321 | return ret; | |
3b0d4f61 | 322 | } |
83f64091 FB |
323 | *pbs = bs; |
324 | return 0; | |
325 | } | |
326 | ||
327 | int bdrv_open(BlockDriverState *bs, const char *filename, int flags) | |
328 | { | |
329 | return bdrv_open2(bs, filename, flags, NULL); | |
ea2384d3 FB |
330 | } |
331 | ||
83f64091 | 332 | int bdrv_open2(BlockDriverState *bs, const char *filename, int flags, |
ea2384d3 FB |
333 | BlockDriver *drv) |
334 | { | |
83f64091 | 335 | int ret, open_flags; |
eb5c851f TS |
336 | char tmp_filename[PATH_MAX]; |
337 | char backing_filename[PATH_MAX]; | |
3b46e624 | 338 | |
ea2384d3 FB |
339 | bs->read_only = 0; |
340 | bs->is_temporary = 0; | |
341 | bs->encrypted = 0; | |
712e7874 | 342 | |
83f64091 | 343 | if (flags & BDRV_O_SNAPSHOT) { |
ea2384d3 FB |
344 | BlockDriverState *bs1; |
345 | int64_t total_size; | |
7c96d46e | 346 | int is_protocol = 0; |
3b46e624 | 347 | |
ea2384d3 FB |
348 | /* if snapshot, we create a temporary backing file and open it |
349 | instead of opening 'filename' directly */ | |
33e3963e | 350 | |
ea2384d3 FB |
351 | /* if there is a backing file, use it */ |
352 | bs1 = bdrv_new(""); | |
353 | if (!bs1) { | |
83f64091 | 354 | return -ENOMEM; |
ea2384d3 FB |
355 | } |
356 | if (bdrv_open(bs1, filename, 0) < 0) { | |
357 | bdrv_delete(bs1); | |
358 | return -1; | |
359 | } | |
83f64091 | 360 | total_size = bdrv_getlength(bs1) >> SECTOR_BITS; |
7c96d46e AL |
361 | |
362 | if (bs1->drv && bs1->drv->protocol_name) | |
363 | is_protocol = 1; | |
364 | ||
ea2384d3 | 365 | bdrv_delete(bs1); |
3b46e624 | 366 | |
ea2384d3 | 367 | get_tmp_filename(tmp_filename, sizeof(tmp_filename)); |
7c96d46e AL |
368 | |
369 | /* Real path is meaningless for protocols */ | |
370 | if (is_protocol) | |
371 | snprintf(backing_filename, sizeof(backing_filename), | |
372 | "%s", filename); | |
373 | else | |
374 | realpath(filename, backing_filename); | |
375 | ||
5fafdf24 | 376 | if (bdrv_create(&bdrv_qcow2, tmp_filename, |
a817d936 | 377 | total_size, backing_filename, 0) < 0) { |
ea2384d3 FB |
378 | return -1; |
379 | } | |
380 | filename = tmp_filename; | |
381 | bs->is_temporary = 1; | |
382 | } | |
712e7874 | 383 | |
ea2384d3 | 384 | pstrcpy(bs->filename, sizeof(bs->filename), filename); |
83f64091 FB |
385 | if (flags & BDRV_O_FILE) { |
386 | drv = find_protocol(filename); | |
ea2384d3 | 387 | if (!drv) |
83f64091 FB |
388 | return -ENOENT; |
389 | } else { | |
390 | if (!drv) { | |
391 | drv = find_image_format(filename); | |
392 | if (!drv) | |
393 | return -1; | |
394 | } | |
ea2384d3 FB |
395 | } |
396 | bs->drv = drv; | |
397 | bs->opaque = qemu_mallocz(drv->instance_size); | |
398 | if (bs->opaque == NULL && drv->instance_size > 0) | |
399 | return -1; | |
83f64091 FB |
400 | /* Note: for compatibility, we open disk image files as RDWR, and |
401 | RDONLY as fallback */ | |
402 | if (!(flags & BDRV_O_FILE)) | |
9f7965c7 | 403 | open_flags = BDRV_O_RDWR | (flags & BDRV_O_CACHE_MASK); |
83f64091 FB |
404 | else |
405 | open_flags = flags & ~(BDRV_O_FILE | BDRV_O_SNAPSHOT); | |
406 | ret = drv->bdrv_open(bs, filename, open_flags); | |
a0a83536 | 407 | if ((ret == -EACCES || ret == -EPERM) && !(flags & BDRV_O_FILE)) { |
9f7965c7 | 408 | ret = drv->bdrv_open(bs, filename, open_flags & ~BDRV_O_RDWR); |
83f64091 FB |
409 | bs->read_only = 1; |
410 | } | |
ea2384d3 FB |
411 | if (ret < 0) { |
412 | qemu_free(bs->opaque); | |
6b21b973 FB |
413 | bs->opaque = NULL; |
414 | bs->drv = NULL; | |
83f64091 | 415 | return ret; |
33e3963e | 416 | } |
d15a771d FB |
417 | if (drv->bdrv_getlength) { |
418 | bs->total_sectors = bdrv_getlength(bs) >> SECTOR_BITS; | |
419 | } | |
67b915a5 | 420 | #ifndef _WIN32 |
ea2384d3 FB |
421 | if (bs->is_temporary) { |
422 | unlink(filename); | |
423 | } | |
424 | #endif | |
83f64091 | 425 | if (bs->backing_file[0] != '\0') { |
ea2384d3 FB |
426 | /* if there is a backing file, use it */ |
427 | bs->backing_hd = bdrv_new(""); | |
428 | if (!bs->backing_hd) { | |
429 | fail: | |
430 | bdrv_close(bs); | |
6b21b973 | 431 | return -ENOMEM; |
33e3963e | 432 | } |
83f64091 FB |
433 | path_combine(backing_filename, sizeof(backing_filename), |
434 | filename, bs->backing_file); | |
9f7965c7 | 435 | if (bdrv_open(bs->backing_hd, backing_filename, open_flags) < 0) |
33e3963e | 436 | goto fail; |
33e3963e FB |
437 | } |
438 | ||
b338082b | 439 | /* call the change callback */ |
19cb3738 | 440 | bs->media_changed = 1; |
b338082b FB |
441 | if (bs->change_cb) |
442 | bs->change_cb(bs->change_opaque); | |
443 | ||
444 | return 0; | |
fc01f7e7 FB |
445 | } |
446 | ||
447 | void bdrv_close(BlockDriverState *bs) | |
448 | { | |
19cb3738 | 449 | if (bs->drv) { |
ea2384d3 FB |
450 | if (bs->backing_hd) |
451 | bdrv_delete(bs->backing_hd); | |
452 | bs->drv->bdrv_close(bs); | |
453 | qemu_free(bs->opaque); | |
454 | #ifdef _WIN32 | |
455 | if (bs->is_temporary) { | |
456 | unlink(bs->filename); | |
457 | } | |
67b915a5 | 458 | #endif |
ea2384d3 FB |
459 | bs->opaque = NULL; |
460 | bs->drv = NULL; | |
b338082b FB |
461 | |
462 | /* call the change callback */ | |
19cb3738 | 463 | bs->media_changed = 1; |
b338082b FB |
464 | if (bs->change_cb) |
465 | bs->change_cb(bs->change_opaque); | |
466 | } | |
467 | } | |
468 | ||
469 | void bdrv_delete(BlockDriverState *bs) | |
470 | { | |
34c6f050 AJ |
471 | BlockDriverState **pbs; |
472 | ||
473 | pbs = &bdrv_first; | |
474 | while (*pbs != bs && *pbs != NULL) | |
475 | pbs = &(*pbs)->next; | |
476 | if (*pbs == bs) | |
477 | *pbs = bs->next; | |
478 | ||
b338082b FB |
479 | bdrv_close(bs); |
480 | qemu_free(bs); | |
fc01f7e7 FB |
481 | } |
482 | ||
33e3963e FB |
483 | /* commit COW file into the raw image */ |
484 | int bdrv_commit(BlockDriverState *bs) | |
485 | { | |
19cb3738 | 486 | BlockDriver *drv = bs->drv; |
83f64091 | 487 | int64_t i, total_sectors; |
ea2384d3 FB |
488 | int n, j; |
489 | unsigned char sector[512]; | |
33e3963e | 490 | |
19cb3738 FB |
491 | if (!drv) |
492 | return -ENOMEDIUM; | |
33e3963e FB |
493 | |
494 | if (bs->read_only) { | |
ea2384d3 | 495 | return -EACCES; |
33e3963e FB |
496 | } |
497 | ||
ea2384d3 FB |
498 | if (!bs->backing_hd) { |
499 | return -ENOTSUP; | |
500 | } | |
33e3963e | 501 | |
83f64091 FB |
502 | total_sectors = bdrv_getlength(bs) >> SECTOR_BITS; |
503 | for (i = 0; i < total_sectors;) { | |
19cb3738 | 504 | if (drv->bdrv_is_allocated(bs, i, 65536, &n)) { |
ea2384d3 FB |
505 | for(j = 0; j < n; j++) { |
506 | if (bdrv_read(bs, i, sector, 1) != 0) { | |
507 | return -EIO; | |
508 | } | |
509 | ||
510 | if (bdrv_write(bs->backing_hd, i, sector, 1) != 0) { | |
511 | return -EIO; | |
512 | } | |
513 | i++; | |
33e3963e | 514 | } |
ea2384d3 FB |
515 | } else { |
516 | i += n; | |
517 | } | |
33e3963e | 518 | } |
95389c86 | 519 | |
19cb3738 FB |
520 | if (drv->bdrv_make_empty) |
521 | return drv->bdrv_make_empty(bs); | |
95389c86 | 522 | |
33e3963e FB |
523 | return 0; |
524 | } | |
525 | ||
19cb3738 | 526 | /* return < 0 if error. See bdrv_write() for the return codes */ |
5fafdf24 | 527 | int bdrv_read(BlockDriverState *bs, int64_t sector_num, |
fc01f7e7 FB |
528 | uint8_t *buf, int nb_sectors) |
529 | { | |
ea2384d3 FB |
530 | BlockDriver *drv = bs->drv; |
531 | ||
19cb3738 FB |
532 | if (!drv) |
533 | return -ENOMEDIUM; | |
b338082b | 534 | |
83f64091 FB |
535 | if (drv->bdrv_pread) { |
536 | int ret, len; | |
537 | len = nb_sectors * 512; | |
538 | ret = drv->bdrv_pread(bs, sector_num * 512, buf, len); | |
539 | if (ret < 0) | |
540 | return ret; | |
541 | else if (ret != len) | |
19cb3738 | 542 | return -EINVAL; |
a36e69dd TS |
543 | else { |
544 | bs->rd_bytes += (unsigned) len; | |
545 | bs->rd_ops ++; | |
83f64091 | 546 | return 0; |
a36e69dd | 547 | } |
83f64091 FB |
548 | } else { |
549 | return drv->bdrv_read(bs, sector_num, buf, nb_sectors); | |
33e3963e | 550 | } |
fc01f7e7 FB |
551 | } |
552 | ||
5fafdf24 | 553 | /* Return < 0 if error. Important errors are: |
19cb3738 FB |
554 | -EIO generic I/O error (may happen for all errors) |
555 | -ENOMEDIUM No media inserted. | |
556 | -EINVAL Invalid sector number or nb_sectors | |
557 | -EACCES Trying to write a read-only device | |
558 | */ | |
5fafdf24 | 559 | int bdrv_write(BlockDriverState *bs, int64_t sector_num, |
fc01f7e7 FB |
560 | const uint8_t *buf, int nb_sectors) |
561 | { | |
83f64091 | 562 | BlockDriver *drv = bs->drv; |
19cb3738 FB |
563 | if (!bs->drv) |
564 | return -ENOMEDIUM; | |
0849bf08 | 565 | if (bs->read_only) |
19cb3738 | 566 | return -EACCES; |
83f64091 | 567 | if (drv->bdrv_pwrite) { |
42fb2807 | 568 | int ret, len, count = 0; |
83f64091 | 569 | len = nb_sectors * 512; |
42fb2807 AL |
570 | do { |
571 | ret = drv->bdrv_pwrite(bs, sector_num * 512, buf, len - count); | |
572 | if (ret < 0) { | |
573 | printf("bdrv_write ret=%d\n", ret); | |
574 | return ret; | |
575 | } | |
576 | count += ret; | |
577 | buf += ret; | |
578 | } while (count != len); | |
579 | bs->wr_bytes += (unsigned) len; | |
580 | bs->wr_ops ++; | |
581 | return 0; | |
83f64091 | 582 | } |
42fb2807 | 583 | return drv->bdrv_write(bs, sector_num, buf, nb_sectors); |
83f64091 FB |
584 | } |
585 | ||
5fafdf24 | 586 | static int bdrv_pread_em(BlockDriverState *bs, int64_t offset, |
faea38e7 | 587 | uint8_t *buf, int count1) |
83f64091 | 588 | { |
83f64091 FB |
589 | uint8_t tmp_buf[SECTOR_SIZE]; |
590 | int len, nb_sectors, count; | |
591 | int64_t sector_num; | |
592 | ||
593 | count = count1; | |
594 | /* first read to align to sector start */ | |
595 | len = (SECTOR_SIZE - offset) & (SECTOR_SIZE - 1); | |
596 | if (len > count) | |
597 | len = count; | |
598 | sector_num = offset >> SECTOR_BITS; | |
599 | if (len > 0) { | |
600 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) | |
601 | return -EIO; | |
602 | memcpy(buf, tmp_buf + (offset & (SECTOR_SIZE - 1)), len); | |
603 | count -= len; | |
604 | if (count == 0) | |
605 | return count1; | |
606 | sector_num++; | |
607 | buf += len; | |
608 | } | |
609 | ||
610 | /* read the sectors "in place" */ | |
611 | nb_sectors = count >> SECTOR_BITS; | |
612 | if (nb_sectors > 0) { | |
613 | if (bdrv_read(bs, sector_num, buf, nb_sectors) < 0) | |
614 | return -EIO; | |
615 | sector_num += nb_sectors; | |
616 | len = nb_sectors << SECTOR_BITS; | |
617 | buf += len; | |
618 | count -= len; | |
619 | } | |
620 | ||
621 | /* add data from the last sector */ | |
622 | if (count > 0) { | |
623 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) | |
624 | return -EIO; | |
625 | memcpy(buf, tmp_buf, count); | |
626 | } | |
627 | return count1; | |
628 | } | |
629 | ||
5fafdf24 | 630 | static int bdrv_pwrite_em(BlockDriverState *bs, int64_t offset, |
faea38e7 | 631 | const uint8_t *buf, int count1) |
83f64091 | 632 | { |
83f64091 FB |
633 | uint8_t tmp_buf[SECTOR_SIZE]; |
634 | int len, nb_sectors, count; | |
635 | int64_t sector_num; | |
636 | ||
637 | count = count1; | |
638 | /* first write to align to sector start */ | |
639 | len = (SECTOR_SIZE - offset) & (SECTOR_SIZE - 1); | |
640 | if (len > count) | |
641 | len = count; | |
642 | sector_num = offset >> SECTOR_BITS; | |
643 | if (len > 0) { | |
644 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) | |
645 | return -EIO; | |
646 | memcpy(tmp_buf + (offset & (SECTOR_SIZE - 1)), buf, len); | |
647 | if (bdrv_write(bs, sector_num, tmp_buf, 1) < 0) | |
648 | return -EIO; | |
649 | count -= len; | |
650 | if (count == 0) | |
651 | return count1; | |
652 | sector_num++; | |
653 | buf += len; | |
654 | } | |
655 | ||
656 | /* write the sectors "in place" */ | |
657 | nb_sectors = count >> SECTOR_BITS; | |
658 | if (nb_sectors > 0) { | |
659 | if (bdrv_write(bs, sector_num, buf, nb_sectors) < 0) | |
660 | return -EIO; | |
661 | sector_num += nb_sectors; | |
662 | len = nb_sectors << SECTOR_BITS; | |
663 | buf += len; | |
664 | count -= len; | |
665 | } | |
666 | ||
667 | /* add data from the last sector */ | |
668 | if (count > 0) { | |
669 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) | |
670 | return -EIO; | |
671 | memcpy(tmp_buf, buf, count); | |
672 | if (bdrv_write(bs, sector_num, tmp_buf, 1) < 0) | |
673 | return -EIO; | |
674 | } | |
675 | return count1; | |
676 | } | |
83f64091 FB |
677 | |
678 | /** | |
5fafdf24 | 679 | * Read with byte offsets (needed only for file protocols) |
83f64091 | 680 | */ |
5fafdf24 | 681 | int bdrv_pread(BlockDriverState *bs, int64_t offset, |
83f64091 FB |
682 | void *buf1, int count1) |
683 | { | |
684 | BlockDriver *drv = bs->drv; | |
685 | ||
686 | if (!drv) | |
19cb3738 | 687 | return -ENOMEDIUM; |
83f64091 | 688 | if (!drv->bdrv_pread) |
faea38e7 | 689 | return bdrv_pread_em(bs, offset, buf1, count1); |
83f64091 FB |
690 | return drv->bdrv_pread(bs, offset, buf1, count1); |
691 | } | |
692 | ||
5fafdf24 TS |
693 | /** |
694 | * Write with byte offsets (needed only for file protocols) | |
83f64091 | 695 | */ |
5fafdf24 | 696 | int bdrv_pwrite(BlockDriverState *bs, int64_t offset, |
83f64091 FB |
697 | const void *buf1, int count1) |
698 | { | |
699 | BlockDriver *drv = bs->drv; | |
700 | ||
701 | if (!drv) | |
19cb3738 | 702 | return -ENOMEDIUM; |
83f64091 | 703 | if (!drv->bdrv_pwrite) |
faea38e7 | 704 | return bdrv_pwrite_em(bs, offset, buf1, count1); |
83f64091 FB |
705 | return drv->bdrv_pwrite(bs, offset, buf1, count1); |
706 | } | |
707 | ||
708 | /** | |
709 | * Truncate file to 'offset' bytes (needed only for file protocols) | |
710 | */ | |
711 | int bdrv_truncate(BlockDriverState *bs, int64_t offset) | |
712 | { | |
713 | BlockDriver *drv = bs->drv; | |
714 | if (!drv) | |
19cb3738 | 715 | return -ENOMEDIUM; |
83f64091 FB |
716 | if (!drv->bdrv_truncate) |
717 | return -ENOTSUP; | |
718 | return drv->bdrv_truncate(bs, offset); | |
719 | } | |
720 | ||
721 | /** | |
722 | * Length of a file in bytes. Return < 0 if error or unknown. | |
723 | */ | |
724 | int64_t bdrv_getlength(BlockDriverState *bs) | |
725 | { | |
726 | BlockDriver *drv = bs->drv; | |
727 | if (!drv) | |
19cb3738 | 728 | return -ENOMEDIUM; |
83f64091 FB |
729 | if (!drv->bdrv_getlength) { |
730 | /* legacy mode */ | |
731 | return bs->total_sectors * SECTOR_SIZE; | |
732 | } | |
733 | return drv->bdrv_getlength(bs); | |
fc01f7e7 FB |
734 | } |
735 | ||
19cb3738 | 736 | /* return 0 as number of sectors if no device present or error */ |
96b8f136 | 737 | void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr) |
fc01f7e7 | 738 | { |
19cb3738 FB |
739 | int64_t length; |
740 | length = bdrv_getlength(bs); | |
741 | if (length < 0) | |
742 | length = 0; | |
743 | else | |
744 | length = length >> SECTOR_BITS; | |
745 | *nb_sectors_ptr = length; | |
fc01f7e7 | 746 | } |
cf98951b | 747 | |
f3d54fc4 AL |
748 | struct partition { |
749 | uint8_t boot_ind; /* 0x80 - active */ | |
750 | uint8_t head; /* starting head */ | |
751 | uint8_t sector; /* starting sector */ | |
752 | uint8_t cyl; /* starting cylinder */ | |
753 | uint8_t sys_ind; /* What partition type */ | |
754 | uint8_t end_head; /* end head */ | |
755 | uint8_t end_sector; /* end sector */ | |
756 | uint8_t end_cyl; /* end cylinder */ | |
757 | uint32_t start_sect; /* starting sector counting from 0 */ | |
758 | uint32_t nr_sects; /* nr of sectors in partition */ | |
759 | } __attribute__((packed)); | |
760 | ||
761 | /* try to guess the disk logical geometry from the MSDOS partition table. Return 0 if OK, -1 if could not guess */ | |
762 | static int guess_disk_lchs(BlockDriverState *bs, | |
763 | int *pcylinders, int *pheads, int *psectors) | |
764 | { | |
765 | uint8_t buf[512]; | |
766 | int ret, i, heads, sectors, cylinders; | |
767 | struct partition *p; | |
768 | uint32_t nr_sects; | |
a38131b6 | 769 | uint64_t nb_sectors; |
f3d54fc4 AL |
770 | |
771 | bdrv_get_geometry(bs, &nb_sectors); | |
772 | ||
773 | ret = bdrv_read(bs, 0, buf, 1); | |
774 | if (ret < 0) | |
775 | return -1; | |
776 | /* test msdos magic */ | |
777 | if (buf[510] != 0x55 || buf[511] != 0xaa) | |
778 | return -1; | |
779 | for(i = 0; i < 4; i++) { | |
780 | p = ((struct partition *)(buf + 0x1be)) + i; | |
781 | nr_sects = le32_to_cpu(p->nr_sects); | |
782 | if (nr_sects && p->end_head) { | |
783 | /* We make the assumption that the partition terminates on | |
784 | a cylinder boundary */ | |
785 | heads = p->end_head + 1; | |
786 | sectors = p->end_sector & 63; | |
787 | if (sectors == 0) | |
788 | continue; | |
789 | cylinders = nb_sectors / (heads * sectors); | |
790 | if (cylinders < 1 || cylinders > 16383) | |
791 | continue; | |
792 | *pheads = heads; | |
793 | *psectors = sectors; | |
794 | *pcylinders = cylinders; | |
795 | #if 0 | |
796 | printf("guessed geometry: LCHS=%d %d %d\n", | |
797 | cylinders, heads, sectors); | |
798 | #endif | |
799 | return 0; | |
800 | } | |
801 | } | |
802 | return -1; | |
803 | } | |
804 | ||
805 | void bdrv_guess_geometry(BlockDriverState *bs, int *pcyls, int *pheads, int *psecs) | |
806 | { | |
807 | int translation, lba_detected = 0; | |
808 | int cylinders, heads, secs; | |
a38131b6 | 809 | uint64_t nb_sectors; |
f3d54fc4 AL |
810 | |
811 | /* if a geometry hint is available, use it */ | |
812 | bdrv_get_geometry(bs, &nb_sectors); | |
813 | bdrv_get_geometry_hint(bs, &cylinders, &heads, &secs); | |
814 | translation = bdrv_get_translation_hint(bs); | |
815 | if (cylinders != 0) { | |
816 | *pcyls = cylinders; | |
817 | *pheads = heads; | |
818 | *psecs = secs; | |
819 | } else { | |
820 | if (guess_disk_lchs(bs, &cylinders, &heads, &secs) == 0) { | |
821 | if (heads > 16) { | |
822 | /* if heads > 16, it means that a BIOS LBA | |
823 | translation was active, so the default | |
824 | hardware geometry is OK */ | |
825 | lba_detected = 1; | |
826 | goto default_geometry; | |
827 | } else { | |
828 | *pcyls = cylinders; | |
829 | *pheads = heads; | |
830 | *psecs = secs; | |
831 | /* disable any translation to be in sync with | |
832 | the logical geometry */ | |
833 | if (translation == BIOS_ATA_TRANSLATION_AUTO) { | |
834 | bdrv_set_translation_hint(bs, | |
835 | BIOS_ATA_TRANSLATION_NONE); | |
836 | } | |
837 | } | |
838 | } else { | |
839 | default_geometry: | |
840 | /* if no geometry, use a standard physical disk geometry */ | |
841 | cylinders = nb_sectors / (16 * 63); | |
842 | ||
843 | if (cylinders > 16383) | |
844 | cylinders = 16383; | |
845 | else if (cylinders < 2) | |
846 | cylinders = 2; | |
847 | *pcyls = cylinders; | |
848 | *pheads = 16; | |
849 | *psecs = 63; | |
850 | if ((lba_detected == 1) && (translation == BIOS_ATA_TRANSLATION_AUTO)) { | |
851 | if ((*pcyls * *pheads) <= 131072) { | |
852 | bdrv_set_translation_hint(bs, | |
853 | BIOS_ATA_TRANSLATION_LARGE); | |
854 | } else { | |
855 | bdrv_set_translation_hint(bs, | |
856 | BIOS_ATA_TRANSLATION_LBA); | |
857 | } | |
858 | } | |
859 | } | |
860 | bdrv_set_geometry_hint(bs, *pcyls, *pheads, *psecs); | |
861 | } | |
862 | } | |
863 | ||
5fafdf24 | 864 | void bdrv_set_geometry_hint(BlockDriverState *bs, |
b338082b FB |
865 | int cyls, int heads, int secs) |
866 | { | |
867 | bs->cyls = cyls; | |
868 | bs->heads = heads; | |
869 | bs->secs = secs; | |
870 | } | |
871 | ||
872 | void bdrv_set_type_hint(BlockDriverState *bs, int type) | |
873 | { | |
874 | bs->type = type; | |
875 | bs->removable = ((type == BDRV_TYPE_CDROM || | |
876 | type == BDRV_TYPE_FLOPPY)); | |
877 | } | |
878 | ||
46d4767d FB |
879 | void bdrv_set_translation_hint(BlockDriverState *bs, int translation) |
880 | { | |
881 | bs->translation = translation; | |
882 | } | |
883 | ||
5fafdf24 | 884 | void bdrv_get_geometry_hint(BlockDriverState *bs, |
b338082b FB |
885 | int *pcyls, int *pheads, int *psecs) |
886 | { | |
887 | *pcyls = bs->cyls; | |
888 | *pheads = bs->heads; | |
889 | *psecs = bs->secs; | |
890 | } | |
891 | ||
892 | int bdrv_get_type_hint(BlockDriverState *bs) | |
893 | { | |
894 | return bs->type; | |
895 | } | |
896 | ||
46d4767d FB |
897 | int bdrv_get_translation_hint(BlockDriverState *bs) |
898 | { | |
899 | return bs->translation; | |
900 | } | |
901 | ||
b338082b FB |
902 | int bdrv_is_removable(BlockDriverState *bs) |
903 | { | |
904 | return bs->removable; | |
905 | } | |
906 | ||
907 | int bdrv_is_read_only(BlockDriverState *bs) | |
908 | { | |
909 | return bs->read_only; | |
910 | } | |
911 | ||
985a03b0 TS |
912 | int bdrv_is_sg(BlockDriverState *bs) |
913 | { | |
914 | return bs->sg; | |
915 | } | |
916 | ||
19cb3738 | 917 | /* XXX: no longer used */ |
5fafdf24 | 918 | void bdrv_set_change_cb(BlockDriverState *bs, |
b338082b FB |
919 | void (*change_cb)(void *opaque), void *opaque) |
920 | { | |
921 | bs->change_cb = change_cb; | |
922 | bs->change_opaque = opaque; | |
923 | } | |
924 | ||
ea2384d3 FB |
925 | int bdrv_is_encrypted(BlockDriverState *bs) |
926 | { | |
927 | if (bs->backing_hd && bs->backing_hd->encrypted) | |
928 | return 1; | |
929 | return bs->encrypted; | |
930 | } | |
931 | ||
932 | int bdrv_set_key(BlockDriverState *bs, const char *key) | |
933 | { | |
934 | int ret; | |
935 | if (bs->backing_hd && bs->backing_hd->encrypted) { | |
936 | ret = bdrv_set_key(bs->backing_hd, key); | |
937 | if (ret < 0) | |
938 | return ret; | |
939 | if (!bs->encrypted) | |
940 | return 0; | |
941 | } | |
942 | if (!bs->encrypted || !bs->drv || !bs->drv->bdrv_set_key) | |
943 | return -1; | |
944 | return bs->drv->bdrv_set_key(bs, key); | |
945 | } | |
946 | ||
947 | void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size) | |
948 | { | |
19cb3738 | 949 | if (!bs->drv) { |
ea2384d3 FB |
950 | buf[0] = '\0'; |
951 | } else { | |
952 | pstrcpy(buf, buf_size, bs->drv->format_name); | |
953 | } | |
954 | } | |
955 | ||
5fafdf24 | 956 | void bdrv_iterate_format(void (*it)(void *opaque, const char *name), |
ea2384d3 FB |
957 | void *opaque) |
958 | { | |
959 | BlockDriver *drv; | |
960 | ||
961 | for (drv = first_drv; drv != NULL; drv = drv->next) { | |
962 | it(opaque, drv->format_name); | |
963 | } | |
964 | } | |
965 | ||
b338082b FB |
966 | BlockDriverState *bdrv_find(const char *name) |
967 | { | |
968 | BlockDriverState *bs; | |
969 | ||
970 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { | |
971 | if (!strcmp(name, bs->device_name)) | |
972 | return bs; | |
973 | } | |
974 | return NULL; | |
975 | } | |
976 | ||
81d0912d FB |
977 | void bdrv_iterate(void (*it)(void *opaque, const char *name), void *opaque) |
978 | { | |
979 | BlockDriverState *bs; | |
980 | ||
981 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { | |
982 | it(opaque, bs->device_name); | |
983 | } | |
984 | } | |
985 | ||
ea2384d3 FB |
986 | const char *bdrv_get_device_name(BlockDriverState *bs) |
987 | { | |
988 | return bs->device_name; | |
989 | } | |
990 | ||
7a6cba61 PB |
991 | void bdrv_flush(BlockDriverState *bs) |
992 | { | |
993 | if (bs->drv->bdrv_flush) | |
994 | bs->drv->bdrv_flush(bs); | |
995 | if (bs->backing_hd) | |
996 | bdrv_flush(bs->backing_hd); | |
997 | } | |
998 | ||
c6ca28d6 AL |
999 | void bdrv_flush_all(void) |
1000 | { | |
1001 | BlockDriverState *bs; | |
1002 | ||
1003 | for (bs = bdrv_first; bs != NULL; bs = bs->next) | |
1004 | if (bs->drv && !bdrv_is_read_only(bs) && | |
1005 | (!bdrv_is_removable(bs) || bdrv_is_inserted(bs))) | |
1006 | bdrv_flush(bs); | |
1007 | } | |
1008 | ||
f58c7b35 TS |
1009 | /* |
1010 | * Returns true iff the specified sector is present in the disk image. Drivers | |
1011 | * not implementing the functionality are assumed to not support backing files, | |
1012 | * hence all their sectors are reported as allocated. | |
1013 | * | |
1014 | * 'pnum' is set to the number of sectors (including and immediately following | |
1015 | * the specified sector) that are known to be in the same | |
1016 | * allocated/unallocated state. | |
1017 | * | |
1018 | * 'nb_sectors' is the max value 'pnum' should be set to. | |
1019 | */ | |
1020 | int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, | |
1021 | int *pnum) | |
1022 | { | |
1023 | int64_t n; | |
1024 | if (!bs->drv->bdrv_is_allocated) { | |
1025 | if (sector_num >= bs->total_sectors) { | |
1026 | *pnum = 0; | |
1027 | return 0; | |
1028 | } | |
1029 | n = bs->total_sectors - sector_num; | |
1030 | *pnum = (n < nb_sectors) ? (n) : (nb_sectors); | |
1031 | return 1; | |
1032 | } | |
1033 | return bs->drv->bdrv_is_allocated(bs, sector_num, nb_sectors, pnum); | |
1034 | } | |
1035 | ||
b338082b FB |
1036 | void bdrv_info(void) |
1037 | { | |
1038 | BlockDriverState *bs; | |
1039 | ||
1040 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { | |
1041 | term_printf("%s:", bs->device_name); | |
1042 | term_printf(" type="); | |
1043 | switch(bs->type) { | |
1044 | case BDRV_TYPE_HD: | |
1045 | term_printf("hd"); | |
1046 | break; | |
1047 | case BDRV_TYPE_CDROM: | |
1048 | term_printf("cdrom"); | |
1049 | break; | |
1050 | case BDRV_TYPE_FLOPPY: | |
1051 | term_printf("floppy"); | |
1052 | break; | |
1053 | } | |
1054 | term_printf(" removable=%d", bs->removable); | |
1055 | if (bs->removable) { | |
1056 | term_printf(" locked=%d", bs->locked); | |
1057 | } | |
19cb3738 | 1058 | if (bs->drv) { |
fef30743 TS |
1059 | term_printf(" file="); |
1060 | term_print_filename(bs->filename); | |
1061 | if (bs->backing_file[0] != '\0') { | |
1062 | term_printf(" backing_file="); | |
1063 | term_print_filename(bs->backing_file); | |
1064 | } | |
b338082b | 1065 | term_printf(" ro=%d", bs->read_only); |
ea2384d3 FB |
1066 | term_printf(" drv=%s", bs->drv->format_name); |
1067 | if (bs->encrypted) | |
1068 | term_printf(" encrypted"); | |
b338082b FB |
1069 | } else { |
1070 | term_printf(" [not inserted]"); | |
1071 | } | |
1072 | term_printf("\n"); | |
1073 | } | |
1074 | } | |
a36e69dd TS |
1075 | |
1076 | /* The "info blockstats" command. */ | |
1077 | void bdrv_info_stats (void) | |
1078 | { | |
1079 | BlockDriverState *bs; | |
1080 | ||
1081 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { | |
1082 | term_printf ("%s:" | |
1083 | " rd_bytes=%" PRIu64 | |
1084 | " wr_bytes=%" PRIu64 | |
1085 | " rd_operations=%" PRIu64 | |
1086 | " wr_operations=%" PRIu64 | |
1087 | "\n", | |
1088 | bs->device_name, | |
1089 | bs->rd_bytes, bs->wr_bytes, | |
1090 | bs->rd_ops, bs->wr_ops); | |
1091 | } | |
1092 | } | |
ea2384d3 | 1093 | |
5fafdf24 | 1094 | void bdrv_get_backing_filename(BlockDriverState *bs, |
83f64091 FB |
1095 | char *filename, int filename_size) |
1096 | { | |
1097 | if (!bs->backing_hd) { | |
1098 | pstrcpy(filename, filename_size, ""); | |
1099 | } else { | |
1100 | pstrcpy(filename, filename_size, bs->backing_file); | |
1101 | } | |
1102 | } | |
1103 | ||
5fafdf24 | 1104 | int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num, |
faea38e7 FB |
1105 | const uint8_t *buf, int nb_sectors) |
1106 | { | |
1107 | BlockDriver *drv = bs->drv; | |
1108 | if (!drv) | |
19cb3738 | 1109 | return -ENOMEDIUM; |
faea38e7 FB |
1110 | if (!drv->bdrv_write_compressed) |
1111 | return -ENOTSUP; | |
1112 | return drv->bdrv_write_compressed(bs, sector_num, buf, nb_sectors); | |
1113 | } | |
3b46e624 | 1114 | |
faea38e7 FB |
1115 | int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) |
1116 | { | |
1117 | BlockDriver *drv = bs->drv; | |
1118 | if (!drv) | |
19cb3738 | 1119 | return -ENOMEDIUM; |
faea38e7 FB |
1120 | if (!drv->bdrv_get_info) |
1121 | return -ENOTSUP; | |
1122 | memset(bdi, 0, sizeof(*bdi)); | |
1123 | return drv->bdrv_get_info(bs, bdi); | |
1124 | } | |
1125 | ||
1126 | /**************************************************************/ | |
1127 | /* handling of snapshots */ | |
1128 | ||
5fafdf24 | 1129 | int bdrv_snapshot_create(BlockDriverState *bs, |
faea38e7 FB |
1130 | QEMUSnapshotInfo *sn_info) |
1131 | { | |
1132 | BlockDriver *drv = bs->drv; | |
1133 | if (!drv) | |
19cb3738 | 1134 | return -ENOMEDIUM; |
faea38e7 FB |
1135 | if (!drv->bdrv_snapshot_create) |
1136 | return -ENOTSUP; | |
1137 | return drv->bdrv_snapshot_create(bs, sn_info); | |
1138 | } | |
1139 | ||
5fafdf24 | 1140 | int bdrv_snapshot_goto(BlockDriverState *bs, |
faea38e7 FB |
1141 | const char *snapshot_id) |
1142 | { | |
1143 | BlockDriver *drv = bs->drv; | |
1144 | if (!drv) | |
19cb3738 | 1145 | return -ENOMEDIUM; |
faea38e7 FB |
1146 | if (!drv->bdrv_snapshot_goto) |
1147 | return -ENOTSUP; | |
1148 | return drv->bdrv_snapshot_goto(bs, snapshot_id); | |
1149 | } | |
1150 | ||
1151 | int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id) | |
1152 | { | |
1153 | BlockDriver *drv = bs->drv; | |
1154 | if (!drv) | |
19cb3738 | 1155 | return -ENOMEDIUM; |
faea38e7 FB |
1156 | if (!drv->bdrv_snapshot_delete) |
1157 | return -ENOTSUP; | |
1158 | return drv->bdrv_snapshot_delete(bs, snapshot_id); | |
1159 | } | |
1160 | ||
5fafdf24 | 1161 | int bdrv_snapshot_list(BlockDriverState *bs, |
faea38e7 FB |
1162 | QEMUSnapshotInfo **psn_info) |
1163 | { | |
1164 | BlockDriver *drv = bs->drv; | |
1165 | if (!drv) | |
19cb3738 | 1166 | return -ENOMEDIUM; |
faea38e7 FB |
1167 | if (!drv->bdrv_snapshot_list) |
1168 | return -ENOTSUP; | |
1169 | return drv->bdrv_snapshot_list(bs, psn_info); | |
1170 | } | |
1171 | ||
1172 | #define NB_SUFFIXES 4 | |
1173 | ||
1174 | char *get_human_readable_size(char *buf, int buf_size, int64_t size) | |
1175 | { | |
1176 | static const char suffixes[NB_SUFFIXES] = "KMGT"; | |
1177 | int64_t base; | |
1178 | int i; | |
1179 | ||
1180 | if (size <= 999) { | |
1181 | snprintf(buf, buf_size, "%" PRId64, size); | |
1182 | } else { | |
1183 | base = 1024; | |
1184 | for(i = 0; i < NB_SUFFIXES; i++) { | |
1185 | if (size < (10 * base)) { | |
5fafdf24 | 1186 | snprintf(buf, buf_size, "%0.1f%c", |
faea38e7 FB |
1187 | (double)size / base, |
1188 | suffixes[i]); | |
1189 | break; | |
1190 | } else if (size < (1000 * base) || i == (NB_SUFFIXES - 1)) { | |
5fafdf24 | 1191 | snprintf(buf, buf_size, "%" PRId64 "%c", |
faea38e7 FB |
1192 | ((size + (base >> 1)) / base), |
1193 | suffixes[i]); | |
1194 | break; | |
1195 | } | |
1196 | base = base * 1024; | |
1197 | } | |
1198 | } | |
1199 | return buf; | |
1200 | } | |
1201 | ||
1202 | char *bdrv_snapshot_dump(char *buf, int buf_size, QEMUSnapshotInfo *sn) | |
1203 | { | |
1204 | char buf1[128], date_buf[128], clock_buf[128]; | |
3b9f94e1 FB |
1205 | #ifdef _WIN32 |
1206 | struct tm *ptm; | |
1207 | #else | |
faea38e7 | 1208 | struct tm tm; |
3b9f94e1 | 1209 | #endif |
faea38e7 FB |
1210 | time_t ti; |
1211 | int64_t secs; | |
1212 | ||
1213 | if (!sn) { | |
5fafdf24 TS |
1214 | snprintf(buf, buf_size, |
1215 | "%-10s%-20s%7s%20s%15s", | |
faea38e7 FB |
1216 | "ID", "TAG", "VM SIZE", "DATE", "VM CLOCK"); |
1217 | } else { | |
1218 | ti = sn->date_sec; | |
3b9f94e1 FB |
1219 | #ifdef _WIN32 |
1220 | ptm = localtime(&ti); | |
1221 | strftime(date_buf, sizeof(date_buf), | |
1222 | "%Y-%m-%d %H:%M:%S", ptm); | |
1223 | #else | |
faea38e7 FB |
1224 | localtime_r(&ti, &tm); |
1225 | strftime(date_buf, sizeof(date_buf), | |
1226 | "%Y-%m-%d %H:%M:%S", &tm); | |
3b9f94e1 | 1227 | #endif |
faea38e7 FB |
1228 | secs = sn->vm_clock_nsec / 1000000000; |
1229 | snprintf(clock_buf, sizeof(clock_buf), | |
1230 | "%02d:%02d:%02d.%03d", | |
1231 | (int)(secs / 3600), | |
1232 | (int)((secs / 60) % 60), | |
5fafdf24 | 1233 | (int)(secs % 60), |
faea38e7 FB |
1234 | (int)((sn->vm_clock_nsec / 1000000) % 1000)); |
1235 | snprintf(buf, buf_size, | |
5fafdf24 | 1236 | "%-10s%-20s%7s%20s%15s", |
faea38e7 FB |
1237 | sn->id_str, sn->name, |
1238 | get_human_readable_size(buf1, sizeof(buf1), sn->vm_state_size), | |
1239 | date_buf, | |
1240 | clock_buf); | |
1241 | } | |
1242 | return buf; | |
1243 | } | |
1244 | ||
83f64091 | 1245 | |
ea2384d3 | 1246 | /**************************************************************/ |
83f64091 | 1247 | /* async I/Os */ |
ea2384d3 | 1248 | |
ce1a14dc PB |
1249 | BlockDriverAIOCB *bdrv_aio_read(BlockDriverState *bs, int64_t sector_num, |
1250 | uint8_t *buf, int nb_sectors, | |
1251 | BlockDriverCompletionFunc *cb, void *opaque) | |
83f64091 FB |
1252 | { |
1253 | BlockDriver *drv = bs->drv; | |
a36e69dd | 1254 | BlockDriverAIOCB *ret; |
83f64091 | 1255 | |
19cb3738 | 1256 | if (!drv) |
ce1a14dc | 1257 | return NULL; |
3b46e624 | 1258 | |
a36e69dd TS |
1259 | ret = drv->bdrv_aio_read(bs, sector_num, buf, nb_sectors, cb, opaque); |
1260 | ||
1261 | if (ret) { | |
1262 | /* Update stats even though technically transfer has not happened. */ | |
1263 | bs->rd_bytes += (unsigned) nb_sectors * SECTOR_SIZE; | |
1264 | bs->rd_ops ++; | |
1265 | } | |
1266 | ||
1267 | return ret; | |
ea2384d3 FB |
1268 | } |
1269 | ||
ce1a14dc PB |
1270 | BlockDriverAIOCB *bdrv_aio_write(BlockDriverState *bs, int64_t sector_num, |
1271 | const uint8_t *buf, int nb_sectors, | |
1272 | BlockDriverCompletionFunc *cb, void *opaque) | |
ea2384d3 | 1273 | { |
83f64091 | 1274 | BlockDriver *drv = bs->drv; |
a36e69dd | 1275 | BlockDriverAIOCB *ret; |
ea2384d3 | 1276 | |
19cb3738 | 1277 | if (!drv) |
ce1a14dc | 1278 | return NULL; |
83f64091 | 1279 | if (bs->read_only) |
ce1a14dc | 1280 | return NULL; |
83f64091 | 1281 | |
a36e69dd TS |
1282 | ret = drv->bdrv_aio_write(bs, sector_num, buf, nb_sectors, cb, opaque); |
1283 | ||
1284 | if (ret) { | |
1285 | /* Update stats even though technically transfer has not happened. */ | |
1286 | bs->wr_bytes += (unsigned) nb_sectors * SECTOR_SIZE; | |
1287 | bs->wr_ops ++; | |
1288 | } | |
1289 | ||
1290 | return ret; | |
83f64091 FB |
1291 | } |
1292 | ||
1293 | void bdrv_aio_cancel(BlockDriverAIOCB *acb) | |
83f64091 | 1294 | { |
ce1a14dc | 1295 | BlockDriver *drv = acb->bs->drv; |
83f64091 | 1296 | |
ce1a14dc | 1297 | drv->bdrv_aio_cancel(acb); |
83f64091 FB |
1298 | } |
1299 | ||
ce1a14dc | 1300 | |
83f64091 FB |
1301 | /**************************************************************/ |
1302 | /* async block device emulation */ | |
1303 | ||
ce1a14dc | 1304 | static void bdrv_aio_bh_cb(void *opaque) |
83f64091 | 1305 | { |
ce1a14dc PB |
1306 | BlockDriverAIOCBSync *acb = opaque; |
1307 | acb->common.cb(acb->common.opaque, acb->ret); | |
1308 | qemu_aio_release(acb); | |
83f64091 | 1309 | } |
beac80cd | 1310 | |
ce1a14dc PB |
1311 | static BlockDriverAIOCB *bdrv_aio_read_em(BlockDriverState *bs, |
1312 | int64_t sector_num, uint8_t *buf, int nb_sectors, | |
1313 | BlockDriverCompletionFunc *cb, void *opaque) | |
83f64091 | 1314 | { |
ce1a14dc | 1315 | BlockDriverAIOCBSync *acb; |
83f64091 | 1316 | int ret; |
ce1a14dc PB |
1317 | |
1318 | acb = qemu_aio_get(bs, cb, opaque); | |
1319 | if (!acb->bh) | |
1320 | acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); | |
1321 | ret = bdrv_read(bs, sector_num, buf, nb_sectors); | |
1322 | acb->ret = ret; | |
1323 | qemu_bh_schedule(acb->bh); | |
1324 | return &acb->common; | |
beac80cd FB |
1325 | } |
1326 | ||
ce1a14dc PB |
1327 | static BlockDriverAIOCB *bdrv_aio_write_em(BlockDriverState *bs, |
1328 | int64_t sector_num, const uint8_t *buf, int nb_sectors, | |
1329 | BlockDriverCompletionFunc *cb, void *opaque) | |
beac80cd | 1330 | { |
ce1a14dc | 1331 | BlockDriverAIOCBSync *acb; |
83f64091 | 1332 | int ret; |
83f64091 | 1333 | |
ce1a14dc PB |
1334 | acb = qemu_aio_get(bs, cb, opaque); |
1335 | if (!acb->bh) | |
1336 | acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); | |
1337 | ret = bdrv_write(bs, sector_num, buf, nb_sectors); | |
1338 | acb->ret = ret; | |
1339 | qemu_bh_schedule(acb->bh); | |
1340 | return &acb->common; | |
beac80cd | 1341 | } |
beac80cd | 1342 | |
ce1a14dc | 1343 | static void bdrv_aio_cancel_em(BlockDriverAIOCB *blockacb) |
ea2384d3 | 1344 | { |
ce1a14dc PB |
1345 | BlockDriverAIOCBSync *acb = (BlockDriverAIOCBSync *)blockacb; |
1346 | qemu_bh_cancel(acb->bh); | |
1347 | qemu_aio_release(acb); | |
83f64091 | 1348 | } |
ea2384d3 | 1349 | |
83f64091 FB |
1350 | /**************************************************************/ |
1351 | /* sync block device emulation */ | |
ea2384d3 | 1352 | |
83f64091 FB |
1353 | static void bdrv_rw_em_cb(void *opaque, int ret) |
1354 | { | |
1355 | *(int *)opaque = ret; | |
ea2384d3 FB |
1356 | } |
1357 | ||
83f64091 FB |
1358 | #define NOT_DONE 0x7fffffff |
1359 | ||
5fafdf24 | 1360 | static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
83f64091 | 1361 | uint8_t *buf, int nb_sectors) |
7a6cba61 | 1362 | { |
ce1a14dc PB |
1363 | int async_ret; |
1364 | BlockDriverAIOCB *acb; | |
83f64091 | 1365 | |
83f64091 | 1366 | async_ret = NOT_DONE; |
5fafdf24 | 1367 | acb = bdrv_aio_read(bs, sector_num, buf, nb_sectors, |
83f64091 | 1368 | bdrv_rw_em_cb, &async_ret); |
baf35cb9 | 1369 | if (acb == NULL) |
ce1a14dc | 1370 | return -1; |
baf35cb9 | 1371 | |
83f64091 FB |
1372 | while (async_ret == NOT_DONE) { |
1373 | qemu_aio_wait(); | |
1374 | } | |
baf35cb9 | 1375 | |
83f64091 | 1376 | return async_ret; |
7a6cba61 PB |
1377 | } |
1378 | ||
83f64091 FB |
1379 | static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, |
1380 | const uint8_t *buf, int nb_sectors) | |
1381 | { | |
ce1a14dc PB |
1382 | int async_ret; |
1383 | BlockDriverAIOCB *acb; | |
83f64091 | 1384 | |
83f64091 | 1385 | async_ret = NOT_DONE; |
5fafdf24 | 1386 | acb = bdrv_aio_write(bs, sector_num, buf, nb_sectors, |
83f64091 | 1387 | bdrv_rw_em_cb, &async_ret); |
baf35cb9 | 1388 | if (acb == NULL) |
ce1a14dc | 1389 | return -1; |
83f64091 FB |
1390 | while (async_ret == NOT_DONE) { |
1391 | qemu_aio_wait(); | |
1392 | } | |
83f64091 FB |
1393 | return async_ret; |
1394 | } | |
ea2384d3 FB |
1395 | |
1396 | void bdrv_init(void) | |
1397 | { | |
1398 | bdrv_register(&bdrv_raw); | |
19cb3738 | 1399 | bdrv_register(&bdrv_host_device); |
ea2384d3 FB |
1400 | #ifndef _WIN32 |
1401 | bdrv_register(&bdrv_cow); | |
1402 | #endif | |
1403 | bdrv_register(&bdrv_qcow); | |
1404 | bdrv_register(&bdrv_vmdk); | |
3c56521b | 1405 | bdrv_register(&bdrv_cloop); |
585d0ed9 | 1406 | bdrv_register(&bdrv_dmg); |
a8753c34 | 1407 | bdrv_register(&bdrv_bochs); |
6a0f9e82 | 1408 | bdrv_register(&bdrv_vpc); |
712e7874 | 1409 | bdrv_register(&bdrv_vvfat); |
faea38e7 | 1410 | bdrv_register(&bdrv_qcow2); |
6ada7453 | 1411 | bdrv_register(&bdrv_parallels); |
75818250 | 1412 | bdrv_register(&bdrv_nbd); |
ea2384d3 | 1413 | } |
ce1a14dc PB |
1414 | |
1415 | void *qemu_aio_get(BlockDriverState *bs, BlockDriverCompletionFunc *cb, | |
1416 | void *opaque) | |
1417 | { | |
1418 | BlockDriver *drv; | |
1419 | BlockDriverAIOCB *acb; | |
1420 | ||
1421 | drv = bs->drv; | |
1422 | if (drv->free_aiocb) { | |
1423 | acb = drv->free_aiocb; | |
1424 | drv->free_aiocb = acb->next; | |
1425 | } else { | |
1426 | acb = qemu_mallocz(drv->aiocb_size); | |
1427 | if (!acb) | |
1428 | return NULL; | |
1429 | } | |
1430 | acb->bs = bs; | |
1431 | acb->cb = cb; | |
1432 | acb->opaque = opaque; | |
1433 | return acb; | |
1434 | } | |
1435 | ||
1436 | void qemu_aio_release(void *p) | |
1437 | { | |
1438 | BlockDriverAIOCB *acb = p; | |
1439 | BlockDriver *drv = acb->bs->drv; | |
1440 | acb->next = drv->free_aiocb; | |
1441 | drv->free_aiocb = acb; | |
1442 | } | |
19cb3738 FB |
1443 | |
1444 | /**************************************************************/ | |
1445 | /* removable device support */ | |
1446 | ||
1447 | /** | |
1448 | * Return TRUE if the media is present | |
1449 | */ | |
1450 | int bdrv_is_inserted(BlockDriverState *bs) | |
1451 | { | |
1452 | BlockDriver *drv = bs->drv; | |
1453 | int ret; | |
1454 | if (!drv) | |
1455 | return 0; | |
1456 | if (!drv->bdrv_is_inserted) | |
1457 | return 1; | |
1458 | ret = drv->bdrv_is_inserted(bs); | |
1459 | return ret; | |
1460 | } | |
1461 | ||
1462 | /** | |
1463 | * Return TRUE if the media changed since the last call to this | |
5fafdf24 | 1464 | * function. It is currently only used for floppy disks |
19cb3738 FB |
1465 | */ |
1466 | int bdrv_media_changed(BlockDriverState *bs) | |
1467 | { | |
1468 | BlockDriver *drv = bs->drv; | |
1469 | int ret; | |
1470 | ||
1471 | if (!drv || !drv->bdrv_media_changed) | |
1472 | ret = -ENOTSUP; | |
1473 | else | |
1474 | ret = drv->bdrv_media_changed(bs); | |
1475 | if (ret == -ENOTSUP) | |
1476 | ret = bs->media_changed; | |
1477 | bs->media_changed = 0; | |
1478 | return ret; | |
1479 | } | |
1480 | ||
1481 | /** | |
1482 | * If eject_flag is TRUE, eject the media. Otherwise, close the tray | |
1483 | */ | |
1484 | void bdrv_eject(BlockDriverState *bs, int eject_flag) | |
1485 | { | |
1486 | BlockDriver *drv = bs->drv; | |
1487 | int ret; | |
1488 | ||
1489 | if (!drv || !drv->bdrv_eject) { | |
1490 | ret = -ENOTSUP; | |
1491 | } else { | |
1492 | ret = drv->bdrv_eject(bs, eject_flag); | |
1493 | } | |
1494 | if (ret == -ENOTSUP) { | |
1495 | if (eject_flag) | |
1496 | bdrv_close(bs); | |
1497 | } | |
1498 | } | |
1499 | ||
1500 | int bdrv_is_locked(BlockDriverState *bs) | |
1501 | { | |
1502 | return bs->locked; | |
1503 | } | |
1504 | ||
1505 | /** | |
1506 | * Lock or unlock the media (if it is locked, the user won't be able | |
1507 | * to eject it manually). | |
1508 | */ | |
1509 | void bdrv_set_locked(BlockDriverState *bs, int locked) | |
1510 | { | |
1511 | BlockDriver *drv = bs->drv; | |
1512 | ||
1513 | bs->locked = locked; | |
1514 | if (drv && drv->bdrv_set_locked) { | |
1515 | drv->bdrv_set_locked(bs, locked); | |
1516 | } | |
1517 | } | |
985a03b0 TS |
1518 | |
1519 | /* needed for generic scsi interface */ | |
1520 | ||
1521 | int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) | |
1522 | { | |
1523 | BlockDriver *drv = bs->drv; | |
1524 | ||
1525 | if (drv && drv->bdrv_ioctl) | |
1526 | return drv->bdrv_ioctl(bs, req, buf); | |
1527 | return -ENOTSUP; | |
1528 | } |