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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 | } | |
3d2d1e39 | 144 | aio_pool_init(&bdrv->aio_pool, bdrv->aiocb_size, bdrv->bdrv_aio_cancel); |
ea2384d3 FB |
145 | bdrv->next = first_drv; |
146 | first_drv = bdrv; | |
147 | } | |
b338082b FB |
148 | |
149 | /* create a new block device (by default it is empty) */ | |
150 | BlockDriverState *bdrv_new(const char *device_name) | |
151 | { | |
152 | BlockDriverState **pbs, *bs; | |
153 | ||
154 | bs = qemu_mallocz(sizeof(BlockDriverState)); | |
b338082b | 155 | pstrcpy(bs->device_name, sizeof(bs->device_name), device_name); |
ea2384d3 FB |
156 | if (device_name[0] != '\0') { |
157 | /* insert at the end */ | |
158 | pbs = &bdrv_first; | |
159 | while (*pbs != NULL) | |
160 | pbs = &(*pbs)->next; | |
161 | *pbs = bs; | |
162 | } | |
b338082b FB |
163 | return bs; |
164 | } | |
165 | ||
ea2384d3 FB |
166 | BlockDriver *bdrv_find_format(const char *format_name) |
167 | { | |
168 | BlockDriver *drv1; | |
169 | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { | |
170 | if (!strcmp(drv1->format_name, format_name)) | |
171 | return drv1; | |
172 | } | |
173 | return NULL; | |
174 | } | |
175 | ||
5fafdf24 | 176 | int bdrv_create(BlockDriver *drv, |
ea2384d3 FB |
177 | const char *filename, int64_t size_in_sectors, |
178 | const char *backing_file, int flags) | |
179 | { | |
180 | if (!drv->bdrv_create) | |
181 | return -ENOTSUP; | |
182 | return drv->bdrv_create(filename, size_in_sectors, backing_file, flags); | |
183 | } | |
184 | ||
d5249393 | 185 | #ifdef _WIN32 |
95389c86 | 186 | void get_tmp_filename(char *filename, int size) |
d5249393 | 187 | { |
3b9f94e1 | 188 | char temp_dir[MAX_PATH]; |
3b46e624 | 189 | |
3b9f94e1 FB |
190 | GetTempPath(MAX_PATH, temp_dir); |
191 | GetTempFileName(temp_dir, "qem", 0, filename); | |
d5249393 FB |
192 | } |
193 | #else | |
95389c86 | 194 | void get_tmp_filename(char *filename, int size) |
fc01f7e7 | 195 | { |
67b915a5 | 196 | int fd; |
7ccfb2eb | 197 | const char *tmpdir; |
d5249393 | 198 | /* XXX: race condition possible */ |
0badc1ee AJ |
199 | tmpdir = getenv("TMPDIR"); |
200 | if (!tmpdir) | |
201 | tmpdir = "/tmp"; | |
202 | snprintf(filename, size, "%s/vl.XXXXXX", tmpdir); | |
ea2384d3 FB |
203 | fd = mkstemp(filename); |
204 | close(fd); | |
205 | } | |
d5249393 | 206 | #endif |
fc01f7e7 | 207 | |
19cb3738 | 208 | #ifdef _WIN32 |
f45512fe FB |
209 | static int is_windows_drive_prefix(const char *filename) |
210 | { | |
211 | return (((filename[0] >= 'a' && filename[0] <= 'z') || | |
212 | (filename[0] >= 'A' && filename[0] <= 'Z')) && | |
213 | filename[1] == ':'); | |
214 | } | |
3b46e624 | 215 | |
19cb3738 FB |
216 | static int is_windows_drive(const char *filename) |
217 | { | |
5fafdf24 | 218 | if (is_windows_drive_prefix(filename) && |
f45512fe | 219 | filename[2] == '\0') |
19cb3738 FB |
220 | return 1; |
221 | if (strstart(filename, "\\\\.\\", NULL) || | |
222 | strstart(filename, "//./", NULL)) | |
223 | return 1; | |
224 | return 0; | |
225 | } | |
226 | #endif | |
227 | ||
83f64091 FB |
228 | static BlockDriver *find_protocol(const char *filename) |
229 | { | |
230 | BlockDriver *drv1; | |
231 | char protocol[128]; | |
232 | int len; | |
233 | const char *p; | |
19cb3738 FB |
234 | |
235 | #ifdef _WIN32 | |
f45512fe FB |
236 | if (is_windows_drive(filename) || |
237 | is_windows_drive_prefix(filename)) | |
19cb3738 FB |
238 | return &bdrv_raw; |
239 | #endif | |
83f64091 FB |
240 | p = strchr(filename, ':'); |
241 | if (!p) | |
242 | return &bdrv_raw; | |
243 | len = p - filename; | |
244 | if (len > sizeof(protocol) - 1) | |
245 | len = sizeof(protocol) - 1; | |
83f64091 FB |
246 | memcpy(protocol, filename, len); |
247 | protocol[len] = '\0'; | |
248 | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { | |
5fafdf24 | 249 | if (drv1->protocol_name && |
83f64091 FB |
250 | !strcmp(drv1->protocol_name, protocol)) |
251 | return drv1; | |
252 | } | |
253 | return NULL; | |
254 | } | |
255 | ||
7674e7bf FB |
256 | /* XXX: force raw format if block or character device ? It would |
257 | simplify the BSD case */ | |
ea2384d3 FB |
258 | static BlockDriver *find_image_format(const char *filename) |
259 | { | |
83f64091 | 260 | int ret, score, score_max; |
ea2384d3 | 261 | BlockDriver *drv1, *drv; |
83f64091 FB |
262 | uint8_t buf[2048]; |
263 | BlockDriverState *bs; | |
3b46e624 | 264 | |
19cb3738 FB |
265 | /* detect host devices. By convention, /dev/cdrom[N] is always |
266 | recognized as a host CDROM */ | |
267 | if (strstart(filename, "/dev/cdrom", NULL)) | |
268 | return &bdrv_host_device; | |
269 | #ifdef _WIN32 | |
270 | if (is_windows_drive(filename)) | |
271 | return &bdrv_host_device; | |
272 | #else | |
273 | { | |
274 | struct stat st; | |
5fafdf24 | 275 | if (stat(filename, &st) >= 0 && |
19cb3738 FB |
276 | (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) { |
277 | return &bdrv_host_device; | |
278 | } | |
279 | } | |
280 | #endif | |
3b46e624 | 281 | |
83f64091 | 282 | drv = find_protocol(filename); |
19cb3738 | 283 | /* no need to test disk image formats for vvfat */ |
83f64091 FB |
284 | if (drv == &bdrv_vvfat) |
285 | return drv; | |
19cb3738 | 286 | |
83f64091 FB |
287 | ret = bdrv_file_open(&bs, filename, BDRV_O_RDONLY); |
288 | if (ret < 0) | |
289 | return NULL; | |
290 | ret = bdrv_pread(bs, 0, buf, sizeof(buf)); | |
291 | bdrv_delete(bs); | |
292 | if (ret < 0) { | |
293 | return NULL; | |
294 | } | |
295 | ||
ea2384d3 FB |
296 | score_max = 0; |
297 | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { | |
83f64091 FB |
298 | if (drv1->bdrv_probe) { |
299 | score = drv1->bdrv_probe(buf, ret, filename); | |
300 | if (score > score_max) { | |
301 | score_max = score; | |
302 | drv = drv1; | |
303 | } | |
0849bf08 | 304 | } |
fc01f7e7 | 305 | } |
ea2384d3 FB |
306 | return drv; |
307 | } | |
308 | ||
83f64091 | 309 | int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags) |
ea2384d3 | 310 | { |
83f64091 FB |
311 | BlockDriverState *bs; |
312 | int ret; | |
313 | ||
314 | bs = bdrv_new(""); | |
83f64091 FB |
315 | ret = bdrv_open2(bs, filename, flags | BDRV_O_FILE, NULL); |
316 | if (ret < 0) { | |
317 | bdrv_delete(bs); | |
318 | return ret; | |
3b0d4f61 | 319 | } |
71d0770c | 320 | bs->growable = 1; |
83f64091 FB |
321 | *pbs = bs; |
322 | return 0; | |
323 | } | |
324 | ||
325 | int bdrv_open(BlockDriverState *bs, const char *filename, int flags) | |
326 | { | |
327 | return bdrv_open2(bs, filename, flags, NULL); | |
ea2384d3 FB |
328 | } |
329 | ||
83f64091 | 330 | int bdrv_open2(BlockDriverState *bs, const char *filename, int flags, |
ea2384d3 FB |
331 | BlockDriver *drv) |
332 | { | |
83f64091 | 333 | int ret, open_flags; |
eb5c851f TS |
334 | char tmp_filename[PATH_MAX]; |
335 | char backing_filename[PATH_MAX]; | |
3b46e624 | 336 | |
ea2384d3 FB |
337 | bs->read_only = 0; |
338 | bs->is_temporary = 0; | |
339 | bs->encrypted = 0; | |
b786b7cc | 340 | bs->valid_key = 0; |
712e7874 | 341 | |
83f64091 | 342 | if (flags & BDRV_O_SNAPSHOT) { |
ea2384d3 FB |
343 | BlockDriverState *bs1; |
344 | int64_t total_size; | |
7c96d46e | 345 | int is_protocol = 0; |
3b46e624 | 346 | |
ea2384d3 FB |
347 | /* if snapshot, we create a temporary backing file and open it |
348 | instead of opening 'filename' directly */ | |
33e3963e | 349 | |
ea2384d3 FB |
350 | /* if there is a backing file, use it */ |
351 | bs1 = bdrv_new(""); | |
295b492c AL |
352 | ret = bdrv_open(bs1, filename, 0); |
353 | if (ret < 0) { | |
ea2384d3 | 354 | bdrv_delete(bs1); |
295b492c | 355 | return ret; |
ea2384d3 | 356 | } |
83f64091 | 357 | total_size = bdrv_getlength(bs1) >> SECTOR_BITS; |
7c96d46e AL |
358 | |
359 | if (bs1->drv && bs1->drv->protocol_name) | |
360 | is_protocol = 1; | |
361 | ||
ea2384d3 | 362 | bdrv_delete(bs1); |
3b46e624 | 363 | |
ea2384d3 | 364 | get_tmp_filename(tmp_filename, sizeof(tmp_filename)); |
7c96d46e AL |
365 | |
366 | /* Real path is meaningless for protocols */ | |
367 | if (is_protocol) | |
368 | snprintf(backing_filename, sizeof(backing_filename), | |
369 | "%s", filename); | |
370 | else | |
371 | realpath(filename, backing_filename); | |
372 | ||
295b492c AL |
373 | ret = bdrv_create(&bdrv_qcow2, tmp_filename, |
374 | total_size, backing_filename, 0); | |
375 | if (ret < 0) { | |
376 | return ret; | |
ea2384d3 FB |
377 | } |
378 | filename = tmp_filename; | |
379 | bs->is_temporary = 1; | |
380 | } | |
712e7874 | 381 | |
ea2384d3 | 382 | pstrcpy(bs->filename, sizeof(bs->filename), filename); |
83f64091 FB |
383 | if (flags & BDRV_O_FILE) { |
384 | drv = find_protocol(filename); | |
295b492c AL |
385 | } else if (!drv) { |
386 | drv = find_image_format(filename); | |
387 | } | |
388 | if (!drv) { | |
389 | ret = -ENOENT; | |
390 | goto unlink_and_fail; | |
ea2384d3 FB |
391 | } |
392 | bs->drv = drv; | |
393 | bs->opaque = qemu_mallocz(drv->instance_size); | |
83f64091 FB |
394 | /* Note: for compatibility, we open disk image files as RDWR, and |
395 | RDONLY as fallback */ | |
396 | if (!(flags & BDRV_O_FILE)) | |
9f7965c7 | 397 | open_flags = BDRV_O_RDWR | (flags & BDRV_O_CACHE_MASK); |
83f64091 FB |
398 | else |
399 | open_flags = flags & ~(BDRV_O_FILE | BDRV_O_SNAPSHOT); | |
400 | ret = drv->bdrv_open(bs, filename, open_flags); | |
a0a83536 | 401 | if ((ret == -EACCES || ret == -EPERM) && !(flags & BDRV_O_FILE)) { |
9f7965c7 | 402 | ret = drv->bdrv_open(bs, filename, open_flags & ~BDRV_O_RDWR); |
83f64091 FB |
403 | bs->read_only = 1; |
404 | } | |
ea2384d3 FB |
405 | if (ret < 0) { |
406 | qemu_free(bs->opaque); | |
6b21b973 FB |
407 | bs->opaque = NULL; |
408 | bs->drv = NULL; | |
295b492c AL |
409 | unlink_and_fail: |
410 | if (bs->is_temporary) | |
411 | unlink(filename); | |
83f64091 | 412 | return ret; |
33e3963e | 413 | } |
d15a771d FB |
414 | if (drv->bdrv_getlength) { |
415 | bs->total_sectors = bdrv_getlength(bs) >> SECTOR_BITS; | |
416 | } | |
67b915a5 | 417 | #ifndef _WIN32 |
ea2384d3 FB |
418 | if (bs->is_temporary) { |
419 | unlink(filename); | |
420 | } | |
421 | #endif | |
83f64091 | 422 | if (bs->backing_file[0] != '\0') { |
ea2384d3 FB |
423 | /* if there is a backing file, use it */ |
424 | bs->backing_hd = bdrv_new(""); | |
83f64091 FB |
425 | path_combine(backing_filename, sizeof(backing_filename), |
426 | filename, bs->backing_file); | |
295b492c AL |
427 | ret = bdrv_open(bs->backing_hd, backing_filename, open_flags); |
428 | if (ret < 0) { | |
429 | bdrv_close(bs); | |
430 | return ret; | |
431 | } | |
33e3963e FB |
432 | } |
433 | ||
b338082b | 434 | /* call the change callback */ |
19cb3738 | 435 | bs->media_changed = 1; |
b338082b FB |
436 | if (bs->change_cb) |
437 | bs->change_cb(bs->change_opaque); | |
438 | ||
439 | return 0; | |
fc01f7e7 FB |
440 | } |
441 | ||
442 | void bdrv_close(BlockDriverState *bs) | |
443 | { | |
19cb3738 | 444 | if (bs->drv) { |
ea2384d3 FB |
445 | if (bs->backing_hd) |
446 | bdrv_delete(bs->backing_hd); | |
447 | bs->drv->bdrv_close(bs); | |
448 | qemu_free(bs->opaque); | |
449 | #ifdef _WIN32 | |
450 | if (bs->is_temporary) { | |
451 | unlink(bs->filename); | |
452 | } | |
67b915a5 | 453 | #endif |
ea2384d3 FB |
454 | bs->opaque = NULL; |
455 | bs->drv = NULL; | |
b338082b FB |
456 | |
457 | /* call the change callback */ | |
19cb3738 | 458 | bs->media_changed = 1; |
b338082b FB |
459 | if (bs->change_cb) |
460 | bs->change_cb(bs->change_opaque); | |
461 | } | |
462 | } | |
463 | ||
464 | void bdrv_delete(BlockDriverState *bs) | |
465 | { | |
34c6f050 AJ |
466 | BlockDriverState **pbs; |
467 | ||
468 | pbs = &bdrv_first; | |
469 | while (*pbs != bs && *pbs != NULL) | |
470 | pbs = &(*pbs)->next; | |
471 | if (*pbs == bs) | |
472 | *pbs = bs->next; | |
473 | ||
b338082b FB |
474 | bdrv_close(bs); |
475 | qemu_free(bs); | |
fc01f7e7 FB |
476 | } |
477 | ||
33e3963e FB |
478 | /* commit COW file into the raw image */ |
479 | int bdrv_commit(BlockDriverState *bs) | |
480 | { | |
19cb3738 | 481 | BlockDriver *drv = bs->drv; |
83f64091 | 482 | int64_t i, total_sectors; |
ea2384d3 FB |
483 | int n, j; |
484 | unsigned char sector[512]; | |
33e3963e | 485 | |
19cb3738 FB |
486 | if (!drv) |
487 | return -ENOMEDIUM; | |
33e3963e FB |
488 | |
489 | if (bs->read_only) { | |
ea2384d3 | 490 | return -EACCES; |
33e3963e FB |
491 | } |
492 | ||
ea2384d3 FB |
493 | if (!bs->backing_hd) { |
494 | return -ENOTSUP; | |
495 | } | |
33e3963e | 496 | |
83f64091 FB |
497 | total_sectors = bdrv_getlength(bs) >> SECTOR_BITS; |
498 | for (i = 0; i < total_sectors;) { | |
19cb3738 | 499 | if (drv->bdrv_is_allocated(bs, i, 65536, &n)) { |
ea2384d3 FB |
500 | for(j = 0; j < n; j++) { |
501 | if (bdrv_read(bs, i, sector, 1) != 0) { | |
502 | return -EIO; | |
503 | } | |
504 | ||
505 | if (bdrv_write(bs->backing_hd, i, sector, 1) != 0) { | |
506 | return -EIO; | |
507 | } | |
508 | i++; | |
33e3963e | 509 | } |
ea2384d3 FB |
510 | } else { |
511 | i += n; | |
512 | } | |
33e3963e | 513 | } |
95389c86 | 514 | |
19cb3738 FB |
515 | if (drv->bdrv_make_empty) |
516 | return drv->bdrv_make_empty(bs); | |
95389c86 | 517 | |
33e3963e FB |
518 | return 0; |
519 | } | |
520 | ||
71d0770c AL |
521 | static int bdrv_check_byte_request(BlockDriverState *bs, int64_t offset, |
522 | size_t size) | |
523 | { | |
524 | int64_t len; | |
525 | ||
526 | if (!bdrv_is_inserted(bs)) | |
527 | return -ENOMEDIUM; | |
528 | ||
529 | if (bs->growable) | |
530 | return 0; | |
531 | ||
532 | len = bdrv_getlength(bs); | |
533 | ||
534 | if ((offset + size) > len) | |
535 | return -EIO; | |
536 | ||
537 | return 0; | |
538 | } | |
539 | ||
540 | static int bdrv_check_request(BlockDriverState *bs, int64_t sector_num, | |
541 | int nb_sectors) | |
542 | { | |
543 | int64_t offset; | |
544 | ||
545 | /* Deal with byte accesses */ | |
546 | if (sector_num < 0) | |
547 | offset = -sector_num; | |
548 | else | |
549 | offset = sector_num * 512; | |
550 | ||
551 | return bdrv_check_byte_request(bs, offset, nb_sectors * 512); | |
552 | } | |
553 | ||
19cb3738 | 554 | /* return < 0 if error. See bdrv_write() for the return codes */ |
5fafdf24 | 555 | int bdrv_read(BlockDriverState *bs, int64_t sector_num, |
fc01f7e7 FB |
556 | uint8_t *buf, int nb_sectors) |
557 | { | |
ea2384d3 FB |
558 | BlockDriver *drv = bs->drv; |
559 | ||
19cb3738 FB |
560 | if (!drv) |
561 | return -ENOMEDIUM; | |
71d0770c AL |
562 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
563 | return -EIO; | |
b338082b | 564 | |
83f64091 FB |
565 | if (drv->bdrv_pread) { |
566 | int ret, len; | |
567 | len = nb_sectors * 512; | |
568 | ret = drv->bdrv_pread(bs, sector_num * 512, buf, len); | |
569 | if (ret < 0) | |
570 | return ret; | |
571 | else if (ret != len) | |
19cb3738 | 572 | return -EINVAL; |
a36e69dd TS |
573 | else { |
574 | bs->rd_bytes += (unsigned) len; | |
575 | bs->rd_ops ++; | |
83f64091 | 576 | return 0; |
a36e69dd | 577 | } |
83f64091 FB |
578 | } else { |
579 | return drv->bdrv_read(bs, sector_num, buf, nb_sectors); | |
33e3963e | 580 | } |
fc01f7e7 FB |
581 | } |
582 | ||
5fafdf24 | 583 | /* Return < 0 if error. Important errors are: |
19cb3738 FB |
584 | -EIO generic I/O error (may happen for all errors) |
585 | -ENOMEDIUM No media inserted. | |
586 | -EINVAL Invalid sector number or nb_sectors | |
587 | -EACCES Trying to write a read-only device | |
588 | */ | |
5fafdf24 | 589 | int bdrv_write(BlockDriverState *bs, int64_t sector_num, |
fc01f7e7 FB |
590 | const uint8_t *buf, int nb_sectors) |
591 | { | |
83f64091 | 592 | BlockDriver *drv = bs->drv; |
19cb3738 FB |
593 | if (!bs->drv) |
594 | return -ENOMEDIUM; | |
0849bf08 | 595 | if (bs->read_only) |
19cb3738 | 596 | return -EACCES; |
71d0770c AL |
597 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
598 | return -EIO; | |
599 | ||
83f64091 | 600 | if (drv->bdrv_pwrite) { |
42fb2807 | 601 | int ret, len, count = 0; |
83f64091 | 602 | len = nb_sectors * 512; |
42fb2807 AL |
603 | do { |
604 | ret = drv->bdrv_pwrite(bs, sector_num * 512, buf, len - count); | |
605 | if (ret < 0) { | |
606 | printf("bdrv_write ret=%d\n", ret); | |
607 | return ret; | |
608 | } | |
609 | count += ret; | |
610 | buf += ret; | |
611 | } while (count != len); | |
612 | bs->wr_bytes += (unsigned) len; | |
613 | bs->wr_ops ++; | |
614 | return 0; | |
83f64091 | 615 | } |
42fb2807 | 616 | return drv->bdrv_write(bs, sector_num, buf, nb_sectors); |
83f64091 FB |
617 | } |
618 | ||
5fafdf24 | 619 | static int bdrv_pread_em(BlockDriverState *bs, int64_t offset, |
faea38e7 | 620 | uint8_t *buf, int count1) |
83f64091 | 621 | { |
83f64091 FB |
622 | uint8_t tmp_buf[SECTOR_SIZE]; |
623 | int len, nb_sectors, count; | |
624 | int64_t sector_num; | |
625 | ||
626 | count = count1; | |
627 | /* first read to align to sector start */ | |
628 | len = (SECTOR_SIZE - offset) & (SECTOR_SIZE - 1); | |
629 | if (len > count) | |
630 | len = count; | |
631 | sector_num = offset >> SECTOR_BITS; | |
632 | if (len > 0) { | |
633 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) | |
634 | return -EIO; | |
635 | memcpy(buf, tmp_buf + (offset & (SECTOR_SIZE - 1)), len); | |
636 | count -= len; | |
637 | if (count == 0) | |
638 | return count1; | |
639 | sector_num++; | |
640 | buf += len; | |
641 | } | |
642 | ||
643 | /* read the sectors "in place" */ | |
644 | nb_sectors = count >> SECTOR_BITS; | |
645 | if (nb_sectors > 0) { | |
646 | if (bdrv_read(bs, sector_num, buf, nb_sectors) < 0) | |
647 | return -EIO; | |
648 | sector_num += nb_sectors; | |
649 | len = nb_sectors << SECTOR_BITS; | |
650 | buf += len; | |
651 | count -= len; | |
652 | } | |
653 | ||
654 | /* add data from the last sector */ | |
655 | if (count > 0) { | |
656 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) | |
657 | return -EIO; | |
658 | memcpy(buf, tmp_buf, count); | |
659 | } | |
660 | return count1; | |
661 | } | |
662 | ||
5fafdf24 | 663 | static int bdrv_pwrite_em(BlockDriverState *bs, int64_t offset, |
faea38e7 | 664 | const uint8_t *buf, int count1) |
83f64091 | 665 | { |
83f64091 FB |
666 | uint8_t tmp_buf[SECTOR_SIZE]; |
667 | int len, nb_sectors, count; | |
668 | int64_t sector_num; | |
669 | ||
670 | count = count1; | |
671 | /* first write to align to sector start */ | |
672 | len = (SECTOR_SIZE - offset) & (SECTOR_SIZE - 1); | |
673 | if (len > count) | |
674 | len = count; | |
675 | sector_num = offset >> SECTOR_BITS; | |
676 | if (len > 0) { | |
677 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) | |
678 | return -EIO; | |
679 | memcpy(tmp_buf + (offset & (SECTOR_SIZE - 1)), buf, len); | |
680 | if (bdrv_write(bs, sector_num, tmp_buf, 1) < 0) | |
681 | return -EIO; | |
682 | count -= len; | |
683 | if (count == 0) | |
684 | return count1; | |
685 | sector_num++; | |
686 | buf += len; | |
687 | } | |
688 | ||
689 | /* write the sectors "in place" */ | |
690 | nb_sectors = count >> SECTOR_BITS; | |
691 | if (nb_sectors > 0) { | |
692 | if (bdrv_write(bs, sector_num, buf, nb_sectors) < 0) | |
693 | return -EIO; | |
694 | sector_num += nb_sectors; | |
695 | len = nb_sectors << SECTOR_BITS; | |
696 | buf += len; | |
697 | count -= len; | |
698 | } | |
699 | ||
700 | /* add data from the last sector */ | |
701 | if (count > 0) { | |
702 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) | |
703 | return -EIO; | |
704 | memcpy(tmp_buf, buf, count); | |
705 | if (bdrv_write(bs, sector_num, tmp_buf, 1) < 0) | |
706 | return -EIO; | |
707 | } | |
708 | return count1; | |
709 | } | |
83f64091 FB |
710 | |
711 | /** | |
5fafdf24 | 712 | * Read with byte offsets (needed only for file protocols) |
83f64091 | 713 | */ |
5fafdf24 | 714 | int bdrv_pread(BlockDriverState *bs, int64_t offset, |
83f64091 FB |
715 | void *buf1, int count1) |
716 | { | |
717 | BlockDriver *drv = bs->drv; | |
718 | ||
719 | if (!drv) | |
19cb3738 | 720 | return -ENOMEDIUM; |
71d0770c AL |
721 | if (bdrv_check_byte_request(bs, offset, count1)) |
722 | return -EIO; | |
723 | ||
83f64091 | 724 | if (!drv->bdrv_pread) |
faea38e7 | 725 | return bdrv_pread_em(bs, offset, buf1, count1); |
83f64091 FB |
726 | return drv->bdrv_pread(bs, offset, buf1, count1); |
727 | } | |
728 | ||
5fafdf24 TS |
729 | /** |
730 | * Write with byte offsets (needed only for file protocols) | |
83f64091 | 731 | */ |
5fafdf24 | 732 | int bdrv_pwrite(BlockDriverState *bs, int64_t offset, |
83f64091 FB |
733 | const void *buf1, int count1) |
734 | { | |
735 | BlockDriver *drv = bs->drv; | |
736 | ||
737 | if (!drv) | |
19cb3738 | 738 | return -ENOMEDIUM; |
71d0770c AL |
739 | if (bdrv_check_byte_request(bs, offset, count1)) |
740 | return -EIO; | |
741 | ||
83f64091 | 742 | if (!drv->bdrv_pwrite) |
faea38e7 | 743 | return bdrv_pwrite_em(bs, offset, buf1, count1); |
83f64091 FB |
744 | return drv->bdrv_pwrite(bs, offset, buf1, count1); |
745 | } | |
746 | ||
747 | /** | |
748 | * Truncate file to 'offset' bytes (needed only for file protocols) | |
749 | */ | |
750 | int bdrv_truncate(BlockDriverState *bs, int64_t offset) | |
751 | { | |
752 | BlockDriver *drv = bs->drv; | |
753 | if (!drv) | |
19cb3738 | 754 | return -ENOMEDIUM; |
83f64091 FB |
755 | if (!drv->bdrv_truncate) |
756 | return -ENOTSUP; | |
757 | return drv->bdrv_truncate(bs, offset); | |
758 | } | |
759 | ||
760 | /** | |
761 | * Length of a file in bytes. Return < 0 if error or unknown. | |
762 | */ | |
763 | int64_t bdrv_getlength(BlockDriverState *bs) | |
764 | { | |
765 | BlockDriver *drv = bs->drv; | |
766 | if (!drv) | |
19cb3738 | 767 | return -ENOMEDIUM; |
83f64091 FB |
768 | if (!drv->bdrv_getlength) { |
769 | /* legacy mode */ | |
770 | return bs->total_sectors * SECTOR_SIZE; | |
771 | } | |
772 | return drv->bdrv_getlength(bs); | |
fc01f7e7 FB |
773 | } |
774 | ||
19cb3738 | 775 | /* return 0 as number of sectors if no device present or error */ |
96b8f136 | 776 | void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr) |
fc01f7e7 | 777 | { |
19cb3738 FB |
778 | int64_t length; |
779 | length = bdrv_getlength(bs); | |
780 | if (length < 0) | |
781 | length = 0; | |
782 | else | |
783 | length = length >> SECTOR_BITS; | |
784 | *nb_sectors_ptr = length; | |
fc01f7e7 | 785 | } |
cf98951b | 786 | |
f3d54fc4 AL |
787 | struct partition { |
788 | uint8_t boot_ind; /* 0x80 - active */ | |
789 | uint8_t head; /* starting head */ | |
790 | uint8_t sector; /* starting sector */ | |
791 | uint8_t cyl; /* starting cylinder */ | |
792 | uint8_t sys_ind; /* What partition type */ | |
793 | uint8_t end_head; /* end head */ | |
794 | uint8_t end_sector; /* end sector */ | |
795 | uint8_t end_cyl; /* end cylinder */ | |
796 | uint32_t start_sect; /* starting sector counting from 0 */ | |
797 | uint32_t nr_sects; /* nr of sectors in partition */ | |
798 | } __attribute__((packed)); | |
799 | ||
800 | /* try to guess the disk logical geometry from the MSDOS partition table. Return 0 if OK, -1 if could not guess */ | |
801 | static int guess_disk_lchs(BlockDriverState *bs, | |
802 | int *pcylinders, int *pheads, int *psectors) | |
803 | { | |
804 | uint8_t buf[512]; | |
805 | int ret, i, heads, sectors, cylinders; | |
806 | struct partition *p; | |
807 | uint32_t nr_sects; | |
a38131b6 | 808 | uint64_t nb_sectors; |
f3d54fc4 AL |
809 | |
810 | bdrv_get_geometry(bs, &nb_sectors); | |
811 | ||
812 | ret = bdrv_read(bs, 0, buf, 1); | |
813 | if (ret < 0) | |
814 | return -1; | |
815 | /* test msdos magic */ | |
816 | if (buf[510] != 0x55 || buf[511] != 0xaa) | |
817 | return -1; | |
818 | for(i = 0; i < 4; i++) { | |
819 | p = ((struct partition *)(buf + 0x1be)) + i; | |
820 | nr_sects = le32_to_cpu(p->nr_sects); | |
821 | if (nr_sects && p->end_head) { | |
822 | /* We make the assumption that the partition terminates on | |
823 | a cylinder boundary */ | |
824 | heads = p->end_head + 1; | |
825 | sectors = p->end_sector & 63; | |
826 | if (sectors == 0) | |
827 | continue; | |
828 | cylinders = nb_sectors / (heads * sectors); | |
829 | if (cylinders < 1 || cylinders > 16383) | |
830 | continue; | |
831 | *pheads = heads; | |
832 | *psectors = sectors; | |
833 | *pcylinders = cylinders; | |
834 | #if 0 | |
835 | printf("guessed geometry: LCHS=%d %d %d\n", | |
836 | cylinders, heads, sectors); | |
837 | #endif | |
838 | return 0; | |
839 | } | |
840 | } | |
841 | return -1; | |
842 | } | |
843 | ||
844 | void bdrv_guess_geometry(BlockDriverState *bs, int *pcyls, int *pheads, int *psecs) | |
845 | { | |
846 | int translation, lba_detected = 0; | |
847 | int cylinders, heads, secs; | |
a38131b6 | 848 | uint64_t nb_sectors; |
f3d54fc4 AL |
849 | |
850 | /* if a geometry hint is available, use it */ | |
851 | bdrv_get_geometry(bs, &nb_sectors); | |
852 | bdrv_get_geometry_hint(bs, &cylinders, &heads, &secs); | |
853 | translation = bdrv_get_translation_hint(bs); | |
854 | if (cylinders != 0) { | |
855 | *pcyls = cylinders; | |
856 | *pheads = heads; | |
857 | *psecs = secs; | |
858 | } else { | |
859 | if (guess_disk_lchs(bs, &cylinders, &heads, &secs) == 0) { | |
860 | if (heads > 16) { | |
861 | /* if heads > 16, it means that a BIOS LBA | |
862 | translation was active, so the default | |
863 | hardware geometry is OK */ | |
864 | lba_detected = 1; | |
865 | goto default_geometry; | |
866 | } else { | |
867 | *pcyls = cylinders; | |
868 | *pheads = heads; | |
869 | *psecs = secs; | |
870 | /* disable any translation to be in sync with | |
871 | the logical geometry */ | |
872 | if (translation == BIOS_ATA_TRANSLATION_AUTO) { | |
873 | bdrv_set_translation_hint(bs, | |
874 | BIOS_ATA_TRANSLATION_NONE); | |
875 | } | |
876 | } | |
877 | } else { | |
878 | default_geometry: | |
879 | /* if no geometry, use a standard physical disk geometry */ | |
880 | cylinders = nb_sectors / (16 * 63); | |
881 | ||
882 | if (cylinders > 16383) | |
883 | cylinders = 16383; | |
884 | else if (cylinders < 2) | |
885 | cylinders = 2; | |
886 | *pcyls = cylinders; | |
887 | *pheads = 16; | |
888 | *psecs = 63; | |
889 | if ((lba_detected == 1) && (translation == BIOS_ATA_TRANSLATION_AUTO)) { | |
890 | if ((*pcyls * *pheads) <= 131072) { | |
891 | bdrv_set_translation_hint(bs, | |
892 | BIOS_ATA_TRANSLATION_LARGE); | |
893 | } else { | |
894 | bdrv_set_translation_hint(bs, | |
895 | BIOS_ATA_TRANSLATION_LBA); | |
896 | } | |
897 | } | |
898 | } | |
899 | bdrv_set_geometry_hint(bs, *pcyls, *pheads, *psecs); | |
900 | } | |
901 | } | |
902 | ||
5fafdf24 | 903 | void bdrv_set_geometry_hint(BlockDriverState *bs, |
b338082b FB |
904 | int cyls, int heads, int secs) |
905 | { | |
906 | bs->cyls = cyls; | |
907 | bs->heads = heads; | |
908 | bs->secs = secs; | |
909 | } | |
910 | ||
911 | void bdrv_set_type_hint(BlockDriverState *bs, int type) | |
912 | { | |
913 | bs->type = type; | |
914 | bs->removable = ((type == BDRV_TYPE_CDROM || | |
915 | type == BDRV_TYPE_FLOPPY)); | |
916 | } | |
917 | ||
46d4767d FB |
918 | void bdrv_set_translation_hint(BlockDriverState *bs, int translation) |
919 | { | |
920 | bs->translation = translation; | |
921 | } | |
922 | ||
5fafdf24 | 923 | void bdrv_get_geometry_hint(BlockDriverState *bs, |
b338082b FB |
924 | int *pcyls, int *pheads, int *psecs) |
925 | { | |
926 | *pcyls = bs->cyls; | |
927 | *pheads = bs->heads; | |
928 | *psecs = bs->secs; | |
929 | } | |
930 | ||
931 | int bdrv_get_type_hint(BlockDriverState *bs) | |
932 | { | |
933 | return bs->type; | |
934 | } | |
935 | ||
46d4767d FB |
936 | int bdrv_get_translation_hint(BlockDriverState *bs) |
937 | { | |
938 | return bs->translation; | |
939 | } | |
940 | ||
b338082b FB |
941 | int bdrv_is_removable(BlockDriverState *bs) |
942 | { | |
943 | return bs->removable; | |
944 | } | |
945 | ||
946 | int bdrv_is_read_only(BlockDriverState *bs) | |
947 | { | |
948 | return bs->read_only; | |
949 | } | |
950 | ||
985a03b0 TS |
951 | int bdrv_is_sg(BlockDriverState *bs) |
952 | { | |
953 | return bs->sg; | |
954 | } | |
955 | ||
19cb3738 | 956 | /* XXX: no longer used */ |
5fafdf24 | 957 | void bdrv_set_change_cb(BlockDriverState *bs, |
b338082b FB |
958 | void (*change_cb)(void *opaque), void *opaque) |
959 | { | |
960 | bs->change_cb = change_cb; | |
961 | bs->change_opaque = opaque; | |
962 | } | |
963 | ||
ea2384d3 FB |
964 | int bdrv_is_encrypted(BlockDriverState *bs) |
965 | { | |
966 | if (bs->backing_hd && bs->backing_hd->encrypted) | |
967 | return 1; | |
968 | return bs->encrypted; | |
969 | } | |
970 | ||
b786b7cc AL |
971 | int bdrv_key_required(BlockDriverState *bs) |
972 | { | |
973 | BlockDriverState *backing_hd = bs->backing_hd; | |
974 | ||
975 | if (backing_hd && backing_hd->encrypted && !backing_hd->valid_key) | |
976 | return 1; | |
977 | return (bs->encrypted && !bs->valid_key); | |
978 | } | |
979 | ||
ea2384d3 FB |
980 | int bdrv_set_key(BlockDriverState *bs, const char *key) |
981 | { | |
982 | int ret; | |
983 | if (bs->backing_hd && bs->backing_hd->encrypted) { | |
984 | ret = bdrv_set_key(bs->backing_hd, key); | |
985 | if (ret < 0) | |
986 | return ret; | |
987 | if (!bs->encrypted) | |
988 | return 0; | |
989 | } | |
990 | if (!bs->encrypted || !bs->drv || !bs->drv->bdrv_set_key) | |
991 | return -1; | |
b786b7cc AL |
992 | ret = bs->drv->bdrv_set_key(bs, key); |
993 | bs->valid_key = (ret == 0); | |
994 | return ret; | |
ea2384d3 FB |
995 | } |
996 | ||
997 | void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size) | |
998 | { | |
19cb3738 | 999 | if (!bs->drv) { |
ea2384d3 FB |
1000 | buf[0] = '\0'; |
1001 | } else { | |
1002 | pstrcpy(buf, buf_size, bs->drv->format_name); | |
1003 | } | |
1004 | } | |
1005 | ||
5fafdf24 | 1006 | void bdrv_iterate_format(void (*it)(void *opaque, const char *name), |
ea2384d3 FB |
1007 | void *opaque) |
1008 | { | |
1009 | BlockDriver *drv; | |
1010 | ||
1011 | for (drv = first_drv; drv != NULL; drv = drv->next) { | |
1012 | it(opaque, drv->format_name); | |
1013 | } | |
1014 | } | |
1015 | ||
b338082b FB |
1016 | BlockDriverState *bdrv_find(const char *name) |
1017 | { | |
1018 | BlockDriverState *bs; | |
1019 | ||
1020 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { | |
1021 | if (!strcmp(name, bs->device_name)) | |
1022 | return bs; | |
1023 | } | |
1024 | return NULL; | |
1025 | } | |
1026 | ||
cb5745c5 | 1027 | void bdrv_iterate(void (*it)(void *opaque, BlockDriverState *bs), void *opaque) |
81d0912d FB |
1028 | { |
1029 | BlockDriverState *bs; | |
1030 | ||
1031 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { | |
cb5745c5 | 1032 | it(opaque, bs); |
81d0912d FB |
1033 | } |
1034 | } | |
1035 | ||
ea2384d3 FB |
1036 | const char *bdrv_get_device_name(BlockDriverState *bs) |
1037 | { | |
1038 | return bs->device_name; | |
1039 | } | |
1040 | ||
7a6cba61 PB |
1041 | void bdrv_flush(BlockDriverState *bs) |
1042 | { | |
1043 | if (bs->drv->bdrv_flush) | |
1044 | bs->drv->bdrv_flush(bs); | |
1045 | if (bs->backing_hd) | |
1046 | bdrv_flush(bs->backing_hd); | |
1047 | } | |
1048 | ||
c6ca28d6 AL |
1049 | void bdrv_flush_all(void) |
1050 | { | |
1051 | BlockDriverState *bs; | |
1052 | ||
1053 | for (bs = bdrv_first; bs != NULL; bs = bs->next) | |
1054 | if (bs->drv && !bdrv_is_read_only(bs) && | |
1055 | (!bdrv_is_removable(bs) || bdrv_is_inserted(bs))) | |
1056 | bdrv_flush(bs); | |
1057 | } | |
1058 | ||
f58c7b35 TS |
1059 | /* |
1060 | * Returns true iff the specified sector is present in the disk image. Drivers | |
1061 | * not implementing the functionality are assumed to not support backing files, | |
1062 | * hence all their sectors are reported as allocated. | |
1063 | * | |
1064 | * 'pnum' is set to the number of sectors (including and immediately following | |
1065 | * the specified sector) that are known to be in the same | |
1066 | * allocated/unallocated state. | |
1067 | * | |
1068 | * 'nb_sectors' is the max value 'pnum' should be set to. | |
1069 | */ | |
1070 | int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, | |
1071 | int *pnum) | |
1072 | { | |
1073 | int64_t n; | |
1074 | if (!bs->drv->bdrv_is_allocated) { | |
1075 | if (sector_num >= bs->total_sectors) { | |
1076 | *pnum = 0; | |
1077 | return 0; | |
1078 | } | |
1079 | n = bs->total_sectors - sector_num; | |
1080 | *pnum = (n < nb_sectors) ? (n) : (nb_sectors); | |
1081 | return 1; | |
1082 | } | |
1083 | return bs->drv->bdrv_is_allocated(bs, sector_num, nb_sectors, pnum); | |
1084 | } | |
1085 | ||
b338082b FB |
1086 | void bdrv_info(void) |
1087 | { | |
1088 | BlockDriverState *bs; | |
1089 | ||
1090 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { | |
1091 | term_printf("%s:", bs->device_name); | |
1092 | term_printf(" type="); | |
1093 | switch(bs->type) { | |
1094 | case BDRV_TYPE_HD: | |
1095 | term_printf("hd"); | |
1096 | break; | |
1097 | case BDRV_TYPE_CDROM: | |
1098 | term_printf("cdrom"); | |
1099 | break; | |
1100 | case BDRV_TYPE_FLOPPY: | |
1101 | term_printf("floppy"); | |
1102 | break; | |
1103 | } | |
1104 | term_printf(" removable=%d", bs->removable); | |
1105 | if (bs->removable) { | |
1106 | term_printf(" locked=%d", bs->locked); | |
1107 | } | |
19cb3738 | 1108 | if (bs->drv) { |
fef30743 TS |
1109 | term_printf(" file="); |
1110 | term_print_filename(bs->filename); | |
1111 | if (bs->backing_file[0] != '\0') { | |
1112 | term_printf(" backing_file="); | |
1113 | term_print_filename(bs->backing_file); | |
1114 | } | |
b338082b | 1115 | term_printf(" ro=%d", bs->read_only); |
ea2384d3 | 1116 | term_printf(" drv=%s", bs->drv->format_name); |
d3be2b2f | 1117 | term_printf(" encrypted=%d", bdrv_is_encrypted(bs)); |
b338082b FB |
1118 | } else { |
1119 | term_printf(" [not inserted]"); | |
1120 | } | |
1121 | term_printf("\n"); | |
1122 | } | |
1123 | } | |
a36e69dd TS |
1124 | |
1125 | /* The "info blockstats" command. */ | |
1126 | void bdrv_info_stats (void) | |
1127 | { | |
1128 | BlockDriverState *bs; | |
1129 | ||
1130 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { | |
1131 | term_printf ("%s:" | |
1132 | " rd_bytes=%" PRIu64 | |
1133 | " wr_bytes=%" PRIu64 | |
1134 | " rd_operations=%" PRIu64 | |
1135 | " wr_operations=%" PRIu64 | |
414c0781 | 1136 | "\n", |
a36e69dd TS |
1137 | bs->device_name, |
1138 | bs->rd_bytes, bs->wr_bytes, | |
1139 | bs->rd_ops, bs->wr_ops); | |
1140 | } | |
1141 | } | |
ea2384d3 | 1142 | |
49780457 AL |
1143 | const char *bdrv_get_encrypted_filename(BlockDriverState *bs) |
1144 | { | |
1145 | if (bs->backing_hd && bs->backing_hd->encrypted) | |
1146 | return bs->backing_file; | |
1147 | else if (bs->encrypted) | |
1148 | return bs->filename; | |
1149 | else | |
1150 | return NULL; | |
1151 | } | |
1152 | ||
5fafdf24 | 1153 | void bdrv_get_backing_filename(BlockDriverState *bs, |
83f64091 FB |
1154 | char *filename, int filename_size) |
1155 | { | |
1156 | if (!bs->backing_hd) { | |
1157 | pstrcpy(filename, filename_size, ""); | |
1158 | } else { | |
1159 | pstrcpy(filename, filename_size, bs->backing_file); | |
1160 | } | |
1161 | } | |
1162 | ||
5fafdf24 | 1163 | int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num, |
faea38e7 FB |
1164 | const uint8_t *buf, int nb_sectors) |
1165 | { | |
1166 | BlockDriver *drv = bs->drv; | |
1167 | if (!drv) | |
19cb3738 | 1168 | return -ENOMEDIUM; |
faea38e7 FB |
1169 | if (!drv->bdrv_write_compressed) |
1170 | return -ENOTSUP; | |
1171 | return drv->bdrv_write_compressed(bs, sector_num, buf, nb_sectors); | |
1172 | } | |
3b46e624 | 1173 | |
faea38e7 FB |
1174 | int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) |
1175 | { | |
1176 | BlockDriver *drv = bs->drv; | |
1177 | if (!drv) | |
19cb3738 | 1178 | return -ENOMEDIUM; |
faea38e7 FB |
1179 | if (!drv->bdrv_get_info) |
1180 | return -ENOTSUP; | |
1181 | memset(bdi, 0, sizeof(*bdi)); | |
1182 | return drv->bdrv_get_info(bs, bdi); | |
1183 | } | |
1184 | ||
8d47bb61 AL |
1185 | int bdrv_put_buffer(BlockDriverState *bs, const uint8_t *buf, int64_t pos, int size) |
1186 | { | |
1187 | BlockDriver *drv = bs->drv; | |
1188 | if (!drv) | |
1189 | return -ENOMEDIUM; | |
1190 | if (!drv->bdrv_put_buffer) | |
1191 | return -ENOTSUP; | |
1192 | return drv->bdrv_put_buffer(bs, buf, pos, size); | |
1193 | } | |
1194 | ||
1195 | int bdrv_get_buffer(BlockDriverState *bs, uint8_t *buf, int64_t pos, int size) | |
1196 | { | |
1197 | BlockDriver *drv = bs->drv; | |
1198 | if (!drv) | |
1199 | return -ENOMEDIUM; | |
1200 | if (!drv->bdrv_get_buffer) | |
1201 | return -ENOTSUP; | |
1202 | return drv->bdrv_get_buffer(bs, buf, pos, size); | |
1203 | } | |
1204 | ||
faea38e7 FB |
1205 | /**************************************************************/ |
1206 | /* handling of snapshots */ | |
1207 | ||
5fafdf24 | 1208 | int bdrv_snapshot_create(BlockDriverState *bs, |
faea38e7 FB |
1209 | QEMUSnapshotInfo *sn_info) |
1210 | { | |
1211 | BlockDriver *drv = bs->drv; | |
1212 | if (!drv) | |
19cb3738 | 1213 | return -ENOMEDIUM; |
faea38e7 FB |
1214 | if (!drv->bdrv_snapshot_create) |
1215 | return -ENOTSUP; | |
1216 | return drv->bdrv_snapshot_create(bs, sn_info); | |
1217 | } | |
1218 | ||
5fafdf24 | 1219 | int bdrv_snapshot_goto(BlockDriverState *bs, |
faea38e7 FB |
1220 | const char *snapshot_id) |
1221 | { | |
1222 | BlockDriver *drv = bs->drv; | |
1223 | if (!drv) | |
19cb3738 | 1224 | return -ENOMEDIUM; |
faea38e7 FB |
1225 | if (!drv->bdrv_snapshot_goto) |
1226 | return -ENOTSUP; | |
1227 | return drv->bdrv_snapshot_goto(bs, snapshot_id); | |
1228 | } | |
1229 | ||
1230 | int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id) | |
1231 | { | |
1232 | BlockDriver *drv = bs->drv; | |
1233 | if (!drv) | |
19cb3738 | 1234 | return -ENOMEDIUM; |
faea38e7 FB |
1235 | if (!drv->bdrv_snapshot_delete) |
1236 | return -ENOTSUP; | |
1237 | return drv->bdrv_snapshot_delete(bs, snapshot_id); | |
1238 | } | |
1239 | ||
5fafdf24 | 1240 | int bdrv_snapshot_list(BlockDriverState *bs, |
faea38e7 FB |
1241 | QEMUSnapshotInfo **psn_info) |
1242 | { | |
1243 | BlockDriver *drv = bs->drv; | |
1244 | if (!drv) | |
19cb3738 | 1245 | return -ENOMEDIUM; |
faea38e7 FB |
1246 | if (!drv->bdrv_snapshot_list) |
1247 | return -ENOTSUP; | |
1248 | return drv->bdrv_snapshot_list(bs, psn_info); | |
1249 | } | |
1250 | ||
1251 | #define NB_SUFFIXES 4 | |
1252 | ||
1253 | char *get_human_readable_size(char *buf, int buf_size, int64_t size) | |
1254 | { | |
1255 | static const char suffixes[NB_SUFFIXES] = "KMGT"; | |
1256 | int64_t base; | |
1257 | int i; | |
1258 | ||
1259 | if (size <= 999) { | |
1260 | snprintf(buf, buf_size, "%" PRId64, size); | |
1261 | } else { | |
1262 | base = 1024; | |
1263 | for(i = 0; i < NB_SUFFIXES; i++) { | |
1264 | if (size < (10 * base)) { | |
5fafdf24 | 1265 | snprintf(buf, buf_size, "%0.1f%c", |
faea38e7 FB |
1266 | (double)size / base, |
1267 | suffixes[i]); | |
1268 | break; | |
1269 | } else if (size < (1000 * base) || i == (NB_SUFFIXES - 1)) { | |
5fafdf24 | 1270 | snprintf(buf, buf_size, "%" PRId64 "%c", |
faea38e7 FB |
1271 | ((size + (base >> 1)) / base), |
1272 | suffixes[i]); | |
1273 | break; | |
1274 | } | |
1275 | base = base * 1024; | |
1276 | } | |
1277 | } | |
1278 | return buf; | |
1279 | } | |
1280 | ||
1281 | char *bdrv_snapshot_dump(char *buf, int buf_size, QEMUSnapshotInfo *sn) | |
1282 | { | |
1283 | char buf1[128], date_buf[128], clock_buf[128]; | |
3b9f94e1 FB |
1284 | #ifdef _WIN32 |
1285 | struct tm *ptm; | |
1286 | #else | |
faea38e7 | 1287 | struct tm tm; |
3b9f94e1 | 1288 | #endif |
faea38e7 FB |
1289 | time_t ti; |
1290 | int64_t secs; | |
1291 | ||
1292 | if (!sn) { | |
5fafdf24 TS |
1293 | snprintf(buf, buf_size, |
1294 | "%-10s%-20s%7s%20s%15s", | |
faea38e7 FB |
1295 | "ID", "TAG", "VM SIZE", "DATE", "VM CLOCK"); |
1296 | } else { | |
1297 | ti = sn->date_sec; | |
3b9f94e1 FB |
1298 | #ifdef _WIN32 |
1299 | ptm = localtime(&ti); | |
1300 | strftime(date_buf, sizeof(date_buf), | |
1301 | "%Y-%m-%d %H:%M:%S", ptm); | |
1302 | #else | |
faea38e7 FB |
1303 | localtime_r(&ti, &tm); |
1304 | strftime(date_buf, sizeof(date_buf), | |
1305 | "%Y-%m-%d %H:%M:%S", &tm); | |
3b9f94e1 | 1306 | #endif |
faea38e7 FB |
1307 | secs = sn->vm_clock_nsec / 1000000000; |
1308 | snprintf(clock_buf, sizeof(clock_buf), | |
1309 | "%02d:%02d:%02d.%03d", | |
1310 | (int)(secs / 3600), | |
1311 | (int)((secs / 60) % 60), | |
5fafdf24 | 1312 | (int)(secs % 60), |
faea38e7 FB |
1313 | (int)((sn->vm_clock_nsec / 1000000) % 1000)); |
1314 | snprintf(buf, buf_size, | |
5fafdf24 | 1315 | "%-10s%-20s%7s%20s%15s", |
faea38e7 FB |
1316 | sn->id_str, sn->name, |
1317 | get_human_readable_size(buf1, sizeof(buf1), sn->vm_state_size), | |
1318 | date_buf, | |
1319 | clock_buf); | |
1320 | } | |
1321 | return buf; | |
1322 | } | |
1323 | ||
83f64091 | 1324 | |
ea2384d3 | 1325 | /**************************************************************/ |
83f64091 | 1326 | /* async I/Os */ |
ea2384d3 | 1327 | |
3b69e4b9 AL |
1328 | typedef struct VectorTranslationState { |
1329 | QEMUIOVector *iov; | |
1330 | uint8_t *bounce; | |
1331 | int is_write; | |
1332 | BlockDriverAIOCB *aiocb; | |
1333 | BlockDriverAIOCB *this_aiocb; | |
1334 | } VectorTranslationState; | |
1335 | ||
1336 | static void bdrv_aio_rw_vector_cb(void *opaque, int ret) | |
1337 | { | |
1338 | VectorTranslationState *s = opaque; | |
1339 | ||
1340 | if (!s->is_write) { | |
249aa745 | 1341 | qemu_iovec_from_buffer(s->iov, s->bounce, s->iov->size); |
3b69e4b9 | 1342 | } |
d905dba4 | 1343 | qemu_vfree(s->bounce); |
3b69e4b9 AL |
1344 | s->this_aiocb->cb(s->this_aiocb->opaque, ret); |
1345 | qemu_aio_release(s->this_aiocb); | |
1346 | } | |
1347 | ||
1348 | static BlockDriverAIOCB *bdrv_aio_rw_vector(BlockDriverState *bs, | |
1349 | int64_t sector_num, | |
1350 | QEMUIOVector *iov, | |
1351 | int nb_sectors, | |
1352 | BlockDriverCompletionFunc *cb, | |
1353 | void *opaque, | |
1354 | int is_write) | |
1355 | ||
1356 | { | |
1357 | VectorTranslationState *s = qemu_mallocz(sizeof(*s)); | |
1358 | BlockDriverAIOCB *aiocb = qemu_aio_get(bs, cb, opaque); | |
1359 | ||
1360 | s->this_aiocb = aiocb; | |
1361 | s->iov = iov; | |
1362 | s->bounce = qemu_memalign(512, nb_sectors * 512); | |
1363 | s->is_write = is_write; | |
1364 | if (is_write) { | |
1365 | qemu_iovec_to_buffer(s->iov, s->bounce); | |
1366 | s->aiocb = bdrv_aio_write(bs, sector_num, s->bounce, nb_sectors, | |
1367 | bdrv_aio_rw_vector_cb, s); | |
1368 | } else { | |
1369 | s->aiocb = bdrv_aio_read(bs, sector_num, s->bounce, nb_sectors, | |
1370 | bdrv_aio_rw_vector_cb, s); | |
1371 | } | |
1372 | return aiocb; | |
1373 | } | |
1374 | ||
1375 | BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num, | |
1376 | QEMUIOVector *iov, int nb_sectors, | |
1377 | BlockDriverCompletionFunc *cb, void *opaque) | |
1378 | { | |
71d0770c AL |
1379 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
1380 | return NULL; | |
1381 | ||
3b69e4b9 AL |
1382 | return bdrv_aio_rw_vector(bs, sector_num, iov, nb_sectors, |
1383 | cb, opaque, 0); | |
1384 | } | |
1385 | ||
1386 | BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num, | |
1387 | QEMUIOVector *iov, int nb_sectors, | |
1388 | BlockDriverCompletionFunc *cb, void *opaque) | |
1389 | { | |
71d0770c AL |
1390 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
1391 | return NULL; | |
1392 | ||
3b69e4b9 AL |
1393 | return bdrv_aio_rw_vector(bs, sector_num, iov, nb_sectors, |
1394 | cb, opaque, 1); | |
1395 | } | |
1396 | ||
ce1a14dc PB |
1397 | BlockDriverAIOCB *bdrv_aio_read(BlockDriverState *bs, int64_t sector_num, |
1398 | uint8_t *buf, int nb_sectors, | |
1399 | BlockDriverCompletionFunc *cb, void *opaque) | |
83f64091 FB |
1400 | { |
1401 | BlockDriver *drv = bs->drv; | |
a36e69dd | 1402 | BlockDriverAIOCB *ret; |
83f64091 | 1403 | |
19cb3738 | 1404 | if (!drv) |
ce1a14dc | 1405 | return NULL; |
71d0770c AL |
1406 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
1407 | return NULL; | |
3b46e624 | 1408 | |
a36e69dd TS |
1409 | ret = drv->bdrv_aio_read(bs, sector_num, buf, nb_sectors, cb, opaque); |
1410 | ||
1411 | if (ret) { | |
1412 | /* Update stats even though technically transfer has not happened. */ | |
1413 | bs->rd_bytes += (unsigned) nb_sectors * SECTOR_SIZE; | |
1414 | bs->rd_ops ++; | |
1415 | } | |
1416 | ||
1417 | return ret; | |
ea2384d3 FB |
1418 | } |
1419 | ||
ce1a14dc PB |
1420 | BlockDriverAIOCB *bdrv_aio_write(BlockDriverState *bs, int64_t sector_num, |
1421 | const uint8_t *buf, int nb_sectors, | |
1422 | BlockDriverCompletionFunc *cb, void *opaque) | |
ea2384d3 | 1423 | { |
83f64091 | 1424 | BlockDriver *drv = bs->drv; |
a36e69dd | 1425 | BlockDriverAIOCB *ret; |
ea2384d3 | 1426 | |
19cb3738 | 1427 | if (!drv) |
ce1a14dc | 1428 | return NULL; |
83f64091 | 1429 | if (bs->read_only) |
ce1a14dc | 1430 | return NULL; |
71d0770c AL |
1431 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
1432 | return NULL; | |
83f64091 | 1433 | |
a36e69dd TS |
1434 | ret = drv->bdrv_aio_write(bs, sector_num, buf, nb_sectors, cb, opaque); |
1435 | ||
1436 | if (ret) { | |
1437 | /* Update stats even though technically transfer has not happened. */ | |
1438 | bs->wr_bytes += (unsigned) nb_sectors * SECTOR_SIZE; | |
1439 | bs->wr_ops ++; | |
1440 | } | |
1441 | ||
1442 | return ret; | |
83f64091 FB |
1443 | } |
1444 | ||
1445 | void bdrv_aio_cancel(BlockDriverAIOCB *acb) | |
83f64091 | 1446 | { |
3b69e4b9 AL |
1447 | if (acb->cb == bdrv_aio_rw_vector_cb) { |
1448 | VectorTranslationState *s = acb->opaque; | |
1449 | acb = s->aiocb; | |
1450 | } | |
1451 | ||
3d2d1e39 | 1452 | acb->pool->cancel(acb); |
83f64091 FB |
1453 | } |
1454 | ||
ce1a14dc | 1455 | |
83f64091 FB |
1456 | /**************************************************************/ |
1457 | /* async block device emulation */ | |
1458 | ||
ce1a14dc | 1459 | static void bdrv_aio_bh_cb(void *opaque) |
83f64091 | 1460 | { |
ce1a14dc PB |
1461 | BlockDriverAIOCBSync *acb = opaque; |
1462 | acb->common.cb(acb->common.opaque, acb->ret); | |
1463 | qemu_aio_release(acb); | |
83f64091 | 1464 | } |
beac80cd | 1465 | |
ce1a14dc PB |
1466 | static BlockDriverAIOCB *bdrv_aio_read_em(BlockDriverState *bs, |
1467 | int64_t sector_num, uint8_t *buf, int nb_sectors, | |
1468 | BlockDriverCompletionFunc *cb, void *opaque) | |
83f64091 | 1469 | { |
ce1a14dc | 1470 | BlockDriverAIOCBSync *acb; |
83f64091 | 1471 | int ret; |
ce1a14dc PB |
1472 | |
1473 | acb = qemu_aio_get(bs, cb, opaque); | |
1474 | if (!acb->bh) | |
1475 | acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); | |
1476 | ret = bdrv_read(bs, sector_num, buf, nb_sectors); | |
1477 | acb->ret = ret; | |
1478 | qemu_bh_schedule(acb->bh); | |
1479 | return &acb->common; | |
beac80cd FB |
1480 | } |
1481 | ||
ce1a14dc PB |
1482 | static BlockDriverAIOCB *bdrv_aio_write_em(BlockDriverState *bs, |
1483 | int64_t sector_num, const uint8_t *buf, int nb_sectors, | |
1484 | BlockDriverCompletionFunc *cb, void *opaque) | |
beac80cd | 1485 | { |
ce1a14dc | 1486 | BlockDriverAIOCBSync *acb; |
83f64091 | 1487 | int ret; |
83f64091 | 1488 | |
ce1a14dc PB |
1489 | acb = qemu_aio_get(bs, cb, opaque); |
1490 | if (!acb->bh) | |
1491 | acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); | |
1492 | ret = bdrv_write(bs, sector_num, buf, nb_sectors); | |
1493 | acb->ret = ret; | |
1494 | qemu_bh_schedule(acb->bh); | |
1495 | return &acb->common; | |
beac80cd | 1496 | } |
beac80cd | 1497 | |
ce1a14dc | 1498 | static void bdrv_aio_cancel_em(BlockDriverAIOCB *blockacb) |
ea2384d3 | 1499 | { |
ce1a14dc PB |
1500 | BlockDriverAIOCBSync *acb = (BlockDriverAIOCBSync *)blockacb; |
1501 | qemu_bh_cancel(acb->bh); | |
1502 | qemu_aio_release(acb); | |
83f64091 | 1503 | } |
ea2384d3 | 1504 | |
83f64091 FB |
1505 | /**************************************************************/ |
1506 | /* sync block device emulation */ | |
ea2384d3 | 1507 | |
83f64091 FB |
1508 | static void bdrv_rw_em_cb(void *opaque, int ret) |
1509 | { | |
1510 | *(int *)opaque = ret; | |
ea2384d3 FB |
1511 | } |
1512 | ||
83f64091 FB |
1513 | #define NOT_DONE 0x7fffffff |
1514 | ||
5fafdf24 | 1515 | static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
83f64091 | 1516 | uint8_t *buf, int nb_sectors) |
7a6cba61 | 1517 | { |
ce1a14dc PB |
1518 | int async_ret; |
1519 | BlockDriverAIOCB *acb; | |
83f64091 | 1520 | |
83f64091 | 1521 | async_ret = NOT_DONE; |
5fafdf24 | 1522 | acb = bdrv_aio_read(bs, sector_num, buf, nb_sectors, |
83f64091 | 1523 | bdrv_rw_em_cb, &async_ret); |
baf35cb9 | 1524 | if (acb == NULL) |
ce1a14dc | 1525 | return -1; |
baf35cb9 | 1526 | |
83f64091 FB |
1527 | while (async_ret == NOT_DONE) { |
1528 | qemu_aio_wait(); | |
1529 | } | |
baf35cb9 | 1530 | |
83f64091 | 1531 | return async_ret; |
7a6cba61 PB |
1532 | } |
1533 | ||
83f64091 FB |
1534 | static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, |
1535 | const uint8_t *buf, int nb_sectors) | |
1536 | { | |
ce1a14dc PB |
1537 | int async_ret; |
1538 | BlockDriverAIOCB *acb; | |
83f64091 | 1539 | |
83f64091 | 1540 | async_ret = NOT_DONE; |
5fafdf24 | 1541 | acb = bdrv_aio_write(bs, sector_num, buf, nb_sectors, |
83f64091 | 1542 | bdrv_rw_em_cb, &async_ret); |
baf35cb9 | 1543 | if (acb == NULL) |
ce1a14dc | 1544 | return -1; |
83f64091 FB |
1545 | while (async_ret == NOT_DONE) { |
1546 | qemu_aio_wait(); | |
1547 | } | |
83f64091 FB |
1548 | return async_ret; |
1549 | } | |
ea2384d3 FB |
1550 | |
1551 | void bdrv_init(void) | |
1552 | { | |
1553 | bdrv_register(&bdrv_raw); | |
19cb3738 | 1554 | bdrv_register(&bdrv_host_device); |
ea2384d3 FB |
1555 | #ifndef _WIN32 |
1556 | bdrv_register(&bdrv_cow); | |
1557 | #endif | |
1558 | bdrv_register(&bdrv_qcow); | |
1559 | bdrv_register(&bdrv_vmdk); | |
3c56521b | 1560 | bdrv_register(&bdrv_cloop); |
585d0ed9 | 1561 | bdrv_register(&bdrv_dmg); |
a8753c34 | 1562 | bdrv_register(&bdrv_bochs); |
6a0f9e82 | 1563 | bdrv_register(&bdrv_vpc); |
712e7874 | 1564 | bdrv_register(&bdrv_vvfat); |
faea38e7 | 1565 | bdrv_register(&bdrv_qcow2); |
6ada7453 | 1566 | bdrv_register(&bdrv_parallels); |
75818250 | 1567 | bdrv_register(&bdrv_nbd); |
ea2384d3 | 1568 | } |
ce1a14dc | 1569 | |
3d2d1e39 AL |
1570 | void aio_pool_init(AIOPool *pool, int aiocb_size, |
1571 | void (*cancel)(BlockDriverAIOCB *acb)) | |
1572 | { | |
1573 | pool->aiocb_size = aiocb_size; | |
1574 | pool->cancel = cancel; | |
1575 | pool->free_aiocb = NULL; | |
1576 | } | |
1577 | ||
1578 | void *qemu_aio_get_pool(AIOPool *pool, BlockDriverState *bs, | |
1579 | BlockDriverCompletionFunc *cb, void *opaque) | |
ce1a14dc | 1580 | { |
ce1a14dc PB |
1581 | BlockDriverAIOCB *acb; |
1582 | ||
3d2d1e39 AL |
1583 | if (pool->free_aiocb) { |
1584 | acb = pool->free_aiocb; | |
1585 | pool->free_aiocb = acb->next; | |
ce1a14dc | 1586 | } else { |
3d2d1e39 AL |
1587 | acb = qemu_mallocz(pool->aiocb_size); |
1588 | acb->pool = pool; | |
ce1a14dc PB |
1589 | } |
1590 | acb->bs = bs; | |
1591 | acb->cb = cb; | |
1592 | acb->opaque = opaque; | |
1593 | return acb; | |
1594 | } | |
1595 | ||
3d2d1e39 AL |
1596 | void *qemu_aio_get(BlockDriverState *bs, BlockDriverCompletionFunc *cb, |
1597 | void *opaque) | |
1598 | { | |
1599 | return qemu_aio_get_pool(&bs->drv->aio_pool, bs, cb, opaque); | |
1600 | } | |
1601 | ||
ce1a14dc PB |
1602 | void qemu_aio_release(void *p) |
1603 | { | |
3d2d1e39 AL |
1604 | BlockDriverAIOCB *acb = (BlockDriverAIOCB *)p; |
1605 | AIOPool *pool = acb->pool; | |
1606 | acb->next = pool->free_aiocb; | |
1607 | pool->free_aiocb = acb; | |
ce1a14dc | 1608 | } |
19cb3738 FB |
1609 | |
1610 | /**************************************************************/ | |
1611 | /* removable device support */ | |
1612 | ||
1613 | /** | |
1614 | * Return TRUE if the media is present | |
1615 | */ | |
1616 | int bdrv_is_inserted(BlockDriverState *bs) | |
1617 | { | |
1618 | BlockDriver *drv = bs->drv; | |
1619 | int ret; | |
1620 | if (!drv) | |
1621 | return 0; | |
1622 | if (!drv->bdrv_is_inserted) | |
1623 | return 1; | |
1624 | ret = drv->bdrv_is_inserted(bs); | |
1625 | return ret; | |
1626 | } | |
1627 | ||
1628 | /** | |
1629 | * Return TRUE if the media changed since the last call to this | |
5fafdf24 | 1630 | * function. It is currently only used for floppy disks |
19cb3738 FB |
1631 | */ |
1632 | int bdrv_media_changed(BlockDriverState *bs) | |
1633 | { | |
1634 | BlockDriver *drv = bs->drv; | |
1635 | int ret; | |
1636 | ||
1637 | if (!drv || !drv->bdrv_media_changed) | |
1638 | ret = -ENOTSUP; | |
1639 | else | |
1640 | ret = drv->bdrv_media_changed(bs); | |
1641 | if (ret == -ENOTSUP) | |
1642 | ret = bs->media_changed; | |
1643 | bs->media_changed = 0; | |
1644 | return ret; | |
1645 | } | |
1646 | ||
1647 | /** | |
1648 | * If eject_flag is TRUE, eject the media. Otherwise, close the tray | |
1649 | */ | |
1650 | void bdrv_eject(BlockDriverState *bs, int eject_flag) | |
1651 | { | |
1652 | BlockDriver *drv = bs->drv; | |
1653 | int ret; | |
1654 | ||
1655 | if (!drv || !drv->bdrv_eject) { | |
1656 | ret = -ENOTSUP; | |
1657 | } else { | |
1658 | ret = drv->bdrv_eject(bs, eject_flag); | |
1659 | } | |
1660 | if (ret == -ENOTSUP) { | |
1661 | if (eject_flag) | |
1662 | bdrv_close(bs); | |
1663 | } | |
1664 | } | |
1665 | ||
1666 | int bdrv_is_locked(BlockDriverState *bs) | |
1667 | { | |
1668 | return bs->locked; | |
1669 | } | |
1670 | ||
1671 | /** | |
1672 | * Lock or unlock the media (if it is locked, the user won't be able | |
1673 | * to eject it manually). | |
1674 | */ | |
1675 | void bdrv_set_locked(BlockDriverState *bs, int locked) | |
1676 | { | |
1677 | BlockDriver *drv = bs->drv; | |
1678 | ||
1679 | bs->locked = locked; | |
1680 | if (drv && drv->bdrv_set_locked) { | |
1681 | drv->bdrv_set_locked(bs, locked); | |
1682 | } | |
1683 | } | |
985a03b0 TS |
1684 | |
1685 | /* needed for generic scsi interface */ | |
1686 | ||
1687 | int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) | |
1688 | { | |
1689 | BlockDriver *drv = bs->drv; | |
1690 | ||
1691 | if (drv && drv->bdrv_ioctl) | |
1692 | return drv->bdrv_ioctl(bs, req, buf); | |
1693 | return -ENOTSUP; | |
1694 | } |