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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 | 24 | #include "config-host.h" |
179a2c19 | 25 | #ifdef HOST_BSD |
3990d09a BS |
26 | /* include native header before sys-queue.h */ |
27 | #include <sys/queue.h> | |
28 | #endif | |
29 | ||
faf07963 | 30 | #include "qemu-common.h" |
376253ec | 31 | #include "monitor.h" |
ea2384d3 | 32 | #include "block_int.h" |
fc01f7e7 | 33 | |
179a2c19 | 34 | #ifdef HOST_BSD |
7674e7bf FB |
35 | #include <sys/types.h> |
36 | #include <sys/stat.h> | |
37 | #include <sys/ioctl.h> | |
c5e97233 | 38 | #ifndef __DragonFly__ |
7674e7bf FB |
39 | #include <sys/disk.h> |
40 | #endif | |
c5e97233 | 41 | #endif |
7674e7bf | 42 | |
49dc768d AL |
43 | #ifdef _WIN32 |
44 | #include <windows.h> | |
45 | #endif | |
46 | ||
83f64091 FB |
47 | #define SECTOR_BITS 9 |
48 | #define SECTOR_SIZE (1 << SECTOR_BITS) | |
49 | ||
c07a9008 AL |
50 | static AIOPool vectored_aio_pool; |
51 | ||
90765429 FB |
52 | typedef struct BlockDriverAIOCBSync { |
53 | BlockDriverAIOCB common; | |
54 | QEMUBH *bh; | |
55 | int ret; | |
56 | } BlockDriverAIOCBSync; | |
57 | ||
ce1a14dc PB |
58 | static BlockDriverAIOCB *bdrv_aio_read_em(BlockDriverState *bs, |
59 | int64_t sector_num, uint8_t *buf, int nb_sectors, | |
60 | BlockDriverCompletionFunc *cb, void *opaque); | |
61 | static BlockDriverAIOCB *bdrv_aio_write_em(BlockDriverState *bs, | |
62 | int64_t sector_num, const uint8_t *buf, int nb_sectors, | |
63 | BlockDriverCompletionFunc *cb, void *opaque); | |
83f64091 | 64 | static void bdrv_aio_cancel_em(BlockDriverAIOCB *acb); |
5fafdf24 | 65 | static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
83f64091 FB |
66 | uint8_t *buf, int nb_sectors); |
67 | static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, | |
68 | const uint8_t *buf, int nb_sectors); | |
ec530c81 | 69 | |
7ee930d0 BS |
70 | BlockDriverState *bdrv_first; |
71 | ||
ea2384d3 FB |
72 | static BlockDriver *first_drv; |
73 | ||
83f64091 | 74 | int path_is_absolute(const char *path) |
3b0d4f61 | 75 | { |
83f64091 | 76 | const char *p; |
21664424 FB |
77 | #ifdef _WIN32 |
78 | /* specific case for names like: "\\.\d:" */ | |
79 | if (*path == '/' || *path == '\\') | |
80 | return 1; | |
81 | #endif | |
83f64091 FB |
82 | p = strchr(path, ':'); |
83 | if (p) | |
84 | p++; | |
85 | else | |
86 | p = path; | |
3b9f94e1 FB |
87 | #ifdef _WIN32 |
88 | return (*p == '/' || *p == '\\'); | |
89 | #else | |
90 | return (*p == '/'); | |
91 | #endif | |
3b0d4f61 FB |
92 | } |
93 | ||
83f64091 FB |
94 | /* if filename is absolute, just copy it to dest. Otherwise, build a |
95 | path to it by considering it is relative to base_path. URL are | |
96 | supported. */ | |
97 | void path_combine(char *dest, int dest_size, | |
98 | const char *base_path, | |
99 | const char *filename) | |
3b0d4f61 | 100 | { |
83f64091 FB |
101 | const char *p, *p1; |
102 | int len; | |
103 | ||
104 | if (dest_size <= 0) | |
105 | return; | |
106 | if (path_is_absolute(filename)) { | |
107 | pstrcpy(dest, dest_size, filename); | |
108 | } else { | |
109 | p = strchr(base_path, ':'); | |
110 | if (p) | |
111 | p++; | |
112 | else | |
113 | p = base_path; | |
3b9f94e1 FB |
114 | p1 = strrchr(base_path, '/'); |
115 | #ifdef _WIN32 | |
116 | { | |
117 | const char *p2; | |
118 | p2 = strrchr(base_path, '\\'); | |
119 | if (!p1 || p2 > p1) | |
120 | p1 = p2; | |
121 | } | |
122 | #endif | |
83f64091 FB |
123 | if (p1) |
124 | p1++; | |
125 | else | |
126 | p1 = base_path; | |
127 | if (p1 > p) | |
128 | p = p1; | |
129 | len = p - base_path; | |
130 | if (len > dest_size - 1) | |
131 | len = dest_size - 1; | |
132 | memcpy(dest, base_path, len); | |
133 | dest[len] = '\0'; | |
134 | pstrcat(dest, dest_size, filename); | |
3b0d4f61 | 135 | } |
3b0d4f61 FB |
136 | } |
137 | ||
3b0d4f61 | 138 | |
9596ebb7 | 139 | static void bdrv_register(BlockDriver *bdrv) |
ea2384d3 | 140 | { |
ce1a14dc | 141 | if (!bdrv->bdrv_aio_read) { |
83f64091 | 142 | /* add AIO emulation layer */ |
83f64091 FB |
143 | bdrv->bdrv_aio_read = bdrv_aio_read_em; |
144 | bdrv->bdrv_aio_write = bdrv_aio_write_em; | |
145 | bdrv->bdrv_aio_cancel = bdrv_aio_cancel_em; | |
90765429 | 146 | bdrv->aiocb_size = sizeof(BlockDriverAIOCBSync); |
eda578e5 | 147 | } else if (!bdrv->bdrv_read) { |
83f64091 FB |
148 | /* add synchronous IO emulation layer */ |
149 | bdrv->bdrv_read = bdrv_read_em; | |
150 | bdrv->bdrv_write = bdrv_write_em; | |
151 | } | |
6bbff9a0 | 152 | aio_pool_init(&bdrv->aio_pool, bdrv->aiocb_size, bdrv->bdrv_aio_cancel); |
ea2384d3 FB |
153 | bdrv->next = first_drv; |
154 | first_drv = bdrv; | |
155 | } | |
b338082b FB |
156 | |
157 | /* create a new block device (by default it is empty) */ | |
158 | BlockDriverState *bdrv_new(const char *device_name) | |
159 | { | |
160 | BlockDriverState **pbs, *bs; | |
161 | ||
162 | bs = qemu_mallocz(sizeof(BlockDriverState)); | |
b338082b | 163 | pstrcpy(bs->device_name, sizeof(bs->device_name), device_name); |
ea2384d3 FB |
164 | if (device_name[0] != '\0') { |
165 | /* insert at the end */ | |
166 | pbs = &bdrv_first; | |
167 | while (*pbs != NULL) | |
168 | pbs = &(*pbs)->next; | |
169 | *pbs = bs; | |
170 | } | |
b338082b FB |
171 | return bs; |
172 | } | |
173 | ||
ea2384d3 FB |
174 | BlockDriver *bdrv_find_format(const char *format_name) |
175 | { | |
176 | BlockDriver *drv1; | |
177 | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { | |
178 | if (!strcmp(drv1->format_name, format_name)) | |
179 | return drv1; | |
180 | } | |
181 | return NULL; | |
182 | } | |
183 | ||
5eb45639 AL |
184 | int bdrv_create2(BlockDriver *drv, |
185 | const char *filename, int64_t size_in_sectors, | |
186 | const char *backing_file, const char *backing_format, | |
187 | int flags) | |
188 | { | |
189 | if (drv->bdrv_create2) | |
190 | return drv->bdrv_create2(filename, size_in_sectors, backing_file, | |
191 | backing_format, flags); | |
192 | if (drv->bdrv_create) | |
193 | return drv->bdrv_create(filename, size_in_sectors, backing_file, | |
194 | flags); | |
195 | return -ENOTSUP; | |
196 | } | |
197 | ||
5fafdf24 | 198 | int bdrv_create(BlockDriver *drv, |
ea2384d3 FB |
199 | const char *filename, int64_t size_in_sectors, |
200 | const char *backing_file, int flags) | |
201 | { | |
202 | if (!drv->bdrv_create) | |
203 | return -ENOTSUP; | |
204 | return drv->bdrv_create(filename, size_in_sectors, backing_file, flags); | |
205 | } | |
206 | ||
d5249393 | 207 | #ifdef _WIN32 |
95389c86 | 208 | void get_tmp_filename(char *filename, int size) |
d5249393 | 209 | { |
3b9f94e1 | 210 | char temp_dir[MAX_PATH]; |
3b46e624 | 211 | |
3b9f94e1 FB |
212 | GetTempPath(MAX_PATH, temp_dir); |
213 | GetTempFileName(temp_dir, "qem", 0, filename); | |
d5249393 FB |
214 | } |
215 | #else | |
95389c86 | 216 | void get_tmp_filename(char *filename, int size) |
fc01f7e7 | 217 | { |
67b915a5 | 218 | int fd; |
7ccfb2eb | 219 | const char *tmpdir; |
d5249393 | 220 | /* XXX: race condition possible */ |
0badc1ee AJ |
221 | tmpdir = getenv("TMPDIR"); |
222 | if (!tmpdir) | |
223 | tmpdir = "/tmp"; | |
224 | snprintf(filename, size, "%s/vl.XXXXXX", tmpdir); | |
ea2384d3 FB |
225 | fd = mkstemp(filename); |
226 | close(fd); | |
227 | } | |
d5249393 | 228 | #endif |
fc01f7e7 | 229 | |
19cb3738 | 230 | #ifdef _WIN32 |
f45512fe FB |
231 | static int is_windows_drive_prefix(const char *filename) |
232 | { | |
233 | return (((filename[0] >= 'a' && filename[0] <= 'z') || | |
234 | (filename[0] >= 'A' && filename[0] <= 'Z')) && | |
235 | filename[1] == ':'); | |
236 | } | |
3b46e624 | 237 | |
19cb3738 FB |
238 | static int is_windows_drive(const char *filename) |
239 | { | |
5fafdf24 | 240 | if (is_windows_drive_prefix(filename) && |
f45512fe | 241 | filename[2] == '\0') |
19cb3738 FB |
242 | return 1; |
243 | if (strstart(filename, "\\\\.\\", NULL) || | |
244 | strstart(filename, "//./", NULL)) | |
245 | return 1; | |
246 | return 0; | |
247 | } | |
248 | #endif | |
249 | ||
83f64091 FB |
250 | static BlockDriver *find_protocol(const char *filename) |
251 | { | |
252 | BlockDriver *drv1; | |
253 | char protocol[128]; | |
254 | int len; | |
255 | const char *p; | |
19cb3738 FB |
256 | |
257 | #ifdef _WIN32 | |
f45512fe FB |
258 | if (is_windows_drive(filename) || |
259 | is_windows_drive_prefix(filename)) | |
19cb3738 FB |
260 | return &bdrv_raw; |
261 | #endif | |
83f64091 FB |
262 | p = strchr(filename, ':'); |
263 | if (!p) | |
264 | return &bdrv_raw; | |
265 | len = p - filename; | |
266 | if (len > sizeof(protocol) - 1) | |
267 | len = sizeof(protocol) - 1; | |
83f64091 FB |
268 | memcpy(protocol, filename, len); |
269 | protocol[len] = '\0'; | |
270 | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { | |
5fafdf24 | 271 | if (drv1->protocol_name && |
83f64091 FB |
272 | !strcmp(drv1->protocol_name, protocol)) |
273 | return drv1; | |
274 | } | |
275 | return NULL; | |
276 | } | |
277 | ||
7674e7bf FB |
278 | /* XXX: force raw format if block or character device ? It would |
279 | simplify the BSD case */ | |
ea2384d3 FB |
280 | static BlockDriver *find_image_format(const char *filename) |
281 | { | |
83f64091 | 282 | int ret, score, score_max; |
ea2384d3 | 283 | BlockDriver *drv1, *drv; |
83f64091 FB |
284 | uint8_t buf[2048]; |
285 | BlockDriverState *bs; | |
3b46e624 | 286 | |
19cb3738 FB |
287 | /* detect host devices. By convention, /dev/cdrom[N] is always |
288 | recognized as a host CDROM */ | |
289 | if (strstart(filename, "/dev/cdrom", NULL)) | |
290 | return &bdrv_host_device; | |
291 | #ifdef _WIN32 | |
292 | if (is_windows_drive(filename)) | |
293 | return &bdrv_host_device; | |
294 | #else | |
295 | { | |
296 | struct stat st; | |
5fafdf24 | 297 | if (stat(filename, &st) >= 0 && |
19cb3738 FB |
298 | (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) { |
299 | return &bdrv_host_device; | |
300 | } | |
301 | } | |
302 | #endif | |
3b46e624 | 303 | |
83f64091 | 304 | drv = find_protocol(filename); |
19cb3738 | 305 | /* no need to test disk image formats for vvfat */ |
83f64091 FB |
306 | if (drv == &bdrv_vvfat) |
307 | return drv; | |
19cb3738 | 308 | |
83f64091 FB |
309 | ret = bdrv_file_open(&bs, filename, BDRV_O_RDONLY); |
310 | if (ret < 0) | |
311 | return NULL; | |
312 | ret = bdrv_pread(bs, 0, buf, sizeof(buf)); | |
313 | bdrv_delete(bs); | |
314 | if (ret < 0) { | |
315 | return NULL; | |
316 | } | |
317 | ||
ea2384d3 FB |
318 | score_max = 0; |
319 | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { | |
83f64091 FB |
320 | if (drv1->bdrv_probe) { |
321 | score = drv1->bdrv_probe(buf, ret, filename); | |
322 | if (score > score_max) { | |
323 | score_max = score; | |
324 | drv = drv1; | |
325 | } | |
0849bf08 | 326 | } |
fc01f7e7 | 327 | } |
ea2384d3 FB |
328 | return drv; |
329 | } | |
330 | ||
83f64091 | 331 | int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags) |
ea2384d3 | 332 | { |
83f64091 FB |
333 | BlockDriverState *bs; |
334 | int ret; | |
335 | ||
336 | bs = bdrv_new(""); | |
83f64091 FB |
337 | ret = bdrv_open2(bs, filename, flags | BDRV_O_FILE, NULL); |
338 | if (ret < 0) { | |
339 | bdrv_delete(bs); | |
340 | return ret; | |
3b0d4f61 | 341 | } |
71d0770c | 342 | bs->growable = 1; |
83f64091 FB |
343 | *pbs = bs; |
344 | return 0; | |
345 | } | |
346 | ||
347 | int bdrv_open(BlockDriverState *bs, const char *filename, int flags) | |
348 | { | |
349 | return bdrv_open2(bs, filename, flags, NULL); | |
ea2384d3 FB |
350 | } |
351 | ||
83f64091 | 352 | int bdrv_open2(BlockDriverState *bs, const char *filename, int flags, |
ea2384d3 FB |
353 | BlockDriver *drv) |
354 | { | |
83f64091 | 355 | int ret, open_flags; |
eb5c851f TS |
356 | char tmp_filename[PATH_MAX]; |
357 | char backing_filename[PATH_MAX]; | |
3b46e624 | 358 | |
ea2384d3 FB |
359 | bs->read_only = 0; |
360 | bs->is_temporary = 0; | |
361 | bs->encrypted = 0; | |
c0f4ce77 | 362 | bs->valid_key = 0; |
712e7874 | 363 | |
83f64091 | 364 | if (flags & BDRV_O_SNAPSHOT) { |
ea2384d3 FB |
365 | BlockDriverState *bs1; |
366 | int64_t total_size; | |
7c96d46e | 367 | int is_protocol = 0; |
3b46e624 | 368 | |
ea2384d3 FB |
369 | /* if snapshot, we create a temporary backing file and open it |
370 | instead of opening 'filename' directly */ | |
33e3963e | 371 | |
ea2384d3 FB |
372 | /* if there is a backing file, use it */ |
373 | bs1 = bdrv_new(""); | |
5eb45639 | 374 | ret = bdrv_open2(bs1, filename, 0, drv); |
51d7c00c | 375 | if (ret < 0) { |
ea2384d3 | 376 | bdrv_delete(bs1); |
51d7c00c | 377 | return ret; |
ea2384d3 | 378 | } |
83f64091 | 379 | total_size = bdrv_getlength(bs1) >> SECTOR_BITS; |
7c96d46e AL |
380 | |
381 | if (bs1->drv && bs1->drv->protocol_name) | |
382 | is_protocol = 1; | |
383 | ||
ea2384d3 | 384 | bdrv_delete(bs1); |
3b46e624 | 385 | |
ea2384d3 | 386 | get_tmp_filename(tmp_filename, sizeof(tmp_filename)); |
7c96d46e AL |
387 | |
388 | /* Real path is meaningless for protocols */ | |
389 | if (is_protocol) | |
390 | snprintf(backing_filename, sizeof(backing_filename), | |
391 | "%s", filename); | |
392 | else | |
393 | realpath(filename, backing_filename); | |
394 | ||
5eb45639 AL |
395 | ret = bdrv_create2(&bdrv_qcow2, tmp_filename, |
396 | total_size, backing_filename, | |
397 | (drv ? drv->format_name : NULL), 0); | |
51d7c00c AL |
398 | if (ret < 0) { |
399 | return ret; | |
ea2384d3 FB |
400 | } |
401 | filename = tmp_filename; | |
5eb45639 | 402 | drv = &bdrv_qcow2; |
ea2384d3 FB |
403 | bs->is_temporary = 1; |
404 | } | |
712e7874 | 405 | |
ea2384d3 | 406 | pstrcpy(bs->filename, sizeof(bs->filename), filename); |
83f64091 FB |
407 | if (flags & BDRV_O_FILE) { |
408 | drv = find_protocol(filename); | |
51d7c00c AL |
409 | } else if (!drv) { |
410 | drv = find_image_format(filename); | |
411 | } | |
412 | if (!drv) { | |
413 | ret = -ENOENT; | |
414 | goto unlink_and_fail; | |
ea2384d3 FB |
415 | } |
416 | bs->drv = drv; | |
417 | bs->opaque = qemu_mallocz(drv->instance_size); | |
83f64091 FB |
418 | /* Note: for compatibility, we open disk image files as RDWR, and |
419 | RDONLY as fallback */ | |
420 | if (!(flags & BDRV_O_FILE)) | |
9f7965c7 | 421 | open_flags = BDRV_O_RDWR | (flags & BDRV_O_CACHE_MASK); |
83f64091 FB |
422 | else |
423 | open_flags = flags & ~(BDRV_O_FILE | BDRV_O_SNAPSHOT); | |
424 | ret = drv->bdrv_open(bs, filename, open_flags); | |
a0a83536 | 425 | if ((ret == -EACCES || ret == -EPERM) && !(flags & BDRV_O_FILE)) { |
9f7965c7 | 426 | ret = drv->bdrv_open(bs, filename, open_flags & ~BDRV_O_RDWR); |
83f64091 FB |
427 | bs->read_only = 1; |
428 | } | |
ea2384d3 FB |
429 | if (ret < 0) { |
430 | qemu_free(bs->opaque); | |
6b21b973 FB |
431 | bs->opaque = NULL; |
432 | bs->drv = NULL; | |
51d7c00c AL |
433 | unlink_and_fail: |
434 | if (bs->is_temporary) | |
435 | unlink(filename); | |
83f64091 | 436 | return ret; |
33e3963e | 437 | } |
d15a771d FB |
438 | if (drv->bdrv_getlength) { |
439 | bs->total_sectors = bdrv_getlength(bs) >> SECTOR_BITS; | |
440 | } | |
67b915a5 | 441 | #ifndef _WIN32 |
ea2384d3 FB |
442 | if (bs->is_temporary) { |
443 | unlink(filename); | |
444 | } | |
445 | #endif | |
83f64091 | 446 | if (bs->backing_file[0] != '\0') { |
ea2384d3 | 447 | /* if there is a backing file, use it */ |
5eb45639 | 448 | BlockDriver *back_drv = NULL; |
ea2384d3 | 449 | bs->backing_hd = bdrv_new(""); |
83f64091 FB |
450 | path_combine(backing_filename, sizeof(backing_filename), |
451 | filename, bs->backing_file); | |
5eb45639 AL |
452 | if (bs->backing_format[0] != '\0') |
453 | back_drv = bdrv_find_format(bs->backing_format); | |
454 | ret = bdrv_open2(bs->backing_hd, backing_filename, open_flags, | |
455 | back_drv); | |
51d7c00c AL |
456 | if (ret < 0) { |
457 | bdrv_close(bs); | |
458 | return ret; | |
459 | } | |
33e3963e FB |
460 | } |
461 | ||
bb5fc20f AL |
462 | if (!bdrv_key_required(bs)) { |
463 | /* call the change callback */ | |
464 | bs->media_changed = 1; | |
465 | if (bs->change_cb) | |
466 | bs->change_cb(bs->change_opaque); | |
467 | } | |
b338082b | 468 | return 0; |
fc01f7e7 FB |
469 | } |
470 | ||
471 | void bdrv_close(BlockDriverState *bs) | |
472 | { | |
19cb3738 | 473 | if (bs->drv) { |
ea2384d3 FB |
474 | if (bs->backing_hd) |
475 | bdrv_delete(bs->backing_hd); | |
476 | bs->drv->bdrv_close(bs); | |
477 | qemu_free(bs->opaque); | |
478 | #ifdef _WIN32 | |
479 | if (bs->is_temporary) { | |
480 | unlink(bs->filename); | |
481 | } | |
67b915a5 | 482 | #endif |
ea2384d3 FB |
483 | bs->opaque = NULL; |
484 | bs->drv = NULL; | |
b338082b FB |
485 | |
486 | /* call the change callback */ | |
19cb3738 | 487 | bs->media_changed = 1; |
b338082b FB |
488 | if (bs->change_cb) |
489 | bs->change_cb(bs->change_opaque); | |
490 | } | |
491 | } | |
492 | ||
493 | void bdrv_delete(BlockDriverState *bs) | |
494 | { | |
34c6f050 AJ |
495 | BlockDriverState **pbs; |
496 | ||
497 | pbs = &bdrv_first; | |
498 | while (*pbs != bs && *pbs != NULL) | |
499 | pbs = &(*pbs)->next; | |
500 | if (*pbs == bs) | |
501 | *pbs = bs->next; | |
502 | ||
b338082b FB |
503 | bdrv_close(bs); |
504 | qemu_free(bs); | |
fc01f7e7 FB |
505 | } |
506 | ||
33e3963e FB |
507 | /* commit COW file into the raw image */ |
508 | int bdrv_commit(BlockDriverState *bs) | |
509 | { | |
19cb3738 | 510 | BlockDriver *drv = bs->drv; |
83f64091 | 511 | int64_t i, total_sectors; |
ea2384d3 FB |
512 | int n, j; |
513 | unsigned char sector[512]; | |
33e3963e | 514 | |
19cb3738 FB |
515 | if (!drv) |
516 | return -ENOMEDIUM; | |
33e3963e FB |
517 | |
518 | if (bs->read_only) { | |
ea2384d3 | 519 | return -EACCES; |
33e3963e FB |
520 | } |
521 | ||
ea2384d3 FB |
522 | if (!bs->backing_hd) { |
523 | return -ENOTSUP; | |
524 | } | |
33e3963e | 525 | |
83f64091 FB |
526 | total_sectors = bdrv_getlength(bs) >> SECTOR_BITS; |
527 | for (i = 0; i < total_sectors;) { | |
19cb3738 | 528 | if (drv->bdrv_is_allocated(bs, i, 65536, &n)) { |
ea2384d3 FB |
529 | for(j = 0; j < n; j++) { |
530 | if (bdrv_read(bs, i, sector, 1) != 0) { | |
531 | return -EIO; | |
532 | } | |
533 | ||
534 | if (bdrv_write(bs->backing_hd, i, sector, 1) != 0) { | |
535 | return -EIO; | |
536 | } | |
537 | i++; | |
33e3963e | 538 | } |
ea2384d3 FB |
539 | } else { |
540 | i += n; | |
541 | } | |
33e3963e | 542 | } |
95389c86 | 543 | |
19cb3738 FB |
544 | if (drv->bdrv_make_empty) |
545 | return drv->bdrv_make_empty(bs); | |
95389c86 | 546 | |
33e3963e FB |
547 | return 0; |
548 | } | |
549 | ||
71d0770c AL |
550 | static int bdrv_check_byte_request(BlockDriverState *bs, int64_t offset, |
551 | size_t size) | |
552 | { | |
553 | int64_t len; | |
554 | ||
555 | if (!bdrv_is_inserted(bs)) | |
556 | return -ENOMEDIUM; | |
557 | ||
558 | if (bs->growable) | |
559 | return 0; | |
560 | ||
561 | len = bdrv_getlength(bs); | |
562 | ||
563 | if ((offset + size) > len) | |
564 | return -EIO; | |
565 | ||
566 | return 0; | |
567 | } | |
568 | ||
569 | static int bdrv_check_request(BlockDriverState *bs, int64_t sector_num, | |
570 | int nb_sectors) | |
571 | { | |
999dec57 | 572 | return bdrv_check_byte_request(bs, sector_num * 512, nb_sectors * 512); |
71d0770c AL |
573 | } |
574 | ||
19cb3738 | 575 | /* return < 0 if error. See bdrv_write() for the return codes */ |
5fafdf24 | 576 | int bdrv_read(BlockDriverState *bs, int64_t sector_num, |
fc01f7e7 FB |
577 | uint8_t *buf, int nb_sectors) |
578 | { | |
ea2384d3 FB |
579 | BlockDriver *drv = bs->drv; |
580 | ||
19cb3738 FB |
581 | if (!drv) |
582 | return -ENOMEDIUM; | |
71d0770c AL |
583 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
584 | return -EIO; | |
b338082b | 585 | |
eda578e5 | 586 | return drv->bdrv_read(bs, sector_num, buf, nb_sectors); |
fc01f7e7 FB |
587 | } |
588 | ||
5fafdf24 | 589 | /* Return < 0 if error. Important errors are: |
19cb3738 FB |
590 | -EIO generic I/O error (may happen for all errors) |
591 | -ENOMEDIUM No media inserted. | |
592 | -EINVAL Invalid sector number or nb_sectors | |
593 | -EACCES Trying to write a read-only device | |
594 | */ | |
5fafdf24 | 595 | int bdrv_write(BlockDriverState *bs, int64_t sector_num, |
fc01f7e7 FB |
596 | const uint8_t *buf, int nb_sectors) |
597 | { | |
83f64091 | 598 | BlockDriver *drv = bs->drv; |
19cb3738 FB |
599 | if (!bs->drv) |
600 | return -ENOMEDIUM; | |
0849bf08 | 601 | if (bs->read_only) |
19cb3738 | 602 | return -EACCES; |
71d0770c AL |
603 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
604 | return -EIO; | |
605 | ||
42fb2807 | 606 | return drv->bdrv_write(bs, sector_num, buf, nb_sectors); |
83f64091 FB |
607 | } |
608 | ||
eda578e5 AL |
609 | int bdrv_pread(BlockDriverState *bs, int64_t offset, |
610 | void *buf, int count1) | |
83f64091 | 611 | { |
83f64091 FB |
612 | uint8_t tmp_buf[SECTOR_SIZE]; |
613 | int len, nb_sectors, count; | |
614 | int64_t sector_num; | |
615 | ||
616 | count = count1; | |
617 | /* first read to align to sector start */ | |
618 | len = (SECTOR_SIZE - offset) & (SECTOR_SIZE - 1); | |
619 | if (len > count) | |
620 | len = count; | |
621 | sector_num = offset >> SECTOR_BITS; | |
622 | if (len > 0) { | |
623 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) | |
624 | return -EIO; | |
625 | memcpy(buf, tmp_buf + (offset & (SECTOR_SIZE - 1)), len); | |
626 | count -= len; | |
627 | if (count == 0) | |
628 | return count1; | |
629 | sector_num++; | |
630 | buf += len; | |
631 | } | |
632 | ||
633 | /* read the sectors "in place" */ | |
634 | nb_sectors = count >> SECTOR_BITS; | |
635 | if (nb_sectors > 0) { | |
636 | if (bdrv_read(bs, sector_num, buf, nb_sectors) < 0) | |
637 | return -EIO; | |
638 | sector_num += nb_sectors; | |
639 | len = nb_sectors << SECTOR_BITS; | |
640 | buf += len; | |
641 | count -= len; | |
642 | } | |
643 | ||
644 | /* add data from the last sector */ | |
645 | if (count > 0) { | |
646 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) | |
647 | return -EIO; | |
648 | memcpy(buf, tmp_buf, count); | |
649 | } | |
650 | return count1; | |
651 | } | |
652 | ||
eda578e5 AL |
653 | int bdrv_pwrite(BlockDriverState *bs, int64_t offset, |
654 | const void *buf, int count1) | |
83f64091 | 655 | { |
83f64091 FB |
656 | uint8_t tmp_buf[SECTOR_SIZE]; |
657 | int len, nb_sectors, count; | |
658 | int64_t sector_num; | |
659 | ||
660 | count = count1; | |
661 | /* first write to align to sector start */ | |
662 | len = (SECTOR_SIZE - offset) & (SECTOR_SIZE - 1); | |
663 | if (len > count) | |
664 | len = count; | |
665 | sector_num = offset >> SECTOR_BITS; | |
666 | if (len > 0) { | |
667 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) | |
668 | return -EIO; | |
669 | memcpy(tmp_buf + (offset & (SECTOR_SIZE - 1)), buf, len); | |
670 | if (bdrv_write(bs, sector_num, tmp_buf, 1) < 0) | |
671 | return -EIO; | |
672 | count -= len; | |
673 | if (count == 0) | |
674 | return count1; | |
675 | sector_num++; | |
676 | buf += len; | |
677 | } | |
678 | ||
679 | /* write the sectors "in place" */ | |
680 | nb_sectors = count >> SECTOR_BITS; | |
681 | if (nb_sectors > 0) { | |
682 | if (bdrv_write(bs, sector_num, buf, nb_sectors) < 0) | |
683 | return -EIO; | |
684 | sector_num += nb_sectors; | |
685 | len = nb_sectors << SECTOR_BITS; | |
686 | buf += len; | |
687 | count -= len; | |
688 | } | |
689 | ||
690 | /* add data from the last sector */ | |
691 | if (count > 0) { | |
692 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) | |
693 | return -EIO; | |
694 | memcpy(tmp_buf, buf, count); | |
695 | if (bdrv_write(bs, sector_num, tmp_buf, 1) < 0) | |
696 | return -EIO; | |
697 | } | |
698 | return count1; | |
699 | } | |
83f64091 | 700 | |
83f64091 FB |
701 | /** |
702 | * Truncate file to 'offset' bytes (needed only for file protocols) | |
703 | */ | |
704 | int bdrv_truncate(BlockDriverState *bs, int64_t offset) | |
705 | { | |
706 | BlockDriver *drv = bs->drv; | |
707 | if (!drv) | |
19cb3738 | 708 | return -ENOMEDIUM; |
83f64091 FB |
709 | if (!drv->bdrv_truncate) |
710 | return -ENOTSUP; | |
711 | return drv->bdrv_truncate(bs, offset); | |
712 | } | |
713 | ||
714 | /** | |
715 | * Length of a file in bytes. Return < 0 if error or unknown. | |
716 | */ | |
717 | int64_t bdrv_getlength(BlockDriverState *bs) | |
718 | { | |
719 | BlockDriver *drv = bs->drv; | |
720 | if (!drv) | |
19cb3738 | 721 | return -ENOMEDIUM; |
83f64091 FB |
722 | if (!drv->bdrv_getlength) { |
723 | /* legacy mode */ | |
724 | return bs->total_sectors * SECTOR_SIZE; | |
725 | } | |
726 | return drv->bdrv_getlength(bs); | |
fc01f7e7 FB |
727 | } |
728 | ||
19cb3738 | 729 | /* return 0 as number of sectors if no device present or error */ |
96b8f136 | 730 | void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr) |
fc01f7e7 | 731 | { |
19cb3738 FB |
732 | int64_t length; |
733 | length = bdrv_getlength(bs); | |
734 | if (length < 0) | |
735 | length = 0; | |
736 | else | |
737 | length = length >> SECTOR_BITS; | |
738 | *nb_sectors_ptr = length; | |
fc01f7e7 | 739 | } |
cf98951b | 740 | |
f3d54fc4 AL |
741 | struct partition { |
742 | uint8_t boot_ind; /* 0x80 - active */ | |
743 | uint8_t head; /* starting head */ | |
744 | uint8_t sector; /* starting sector */ | |
745 | uint8_t cyl; /* starting cylinder */ | |
746 | uint8_t sys_ind; /* What partition type */ | |
747 | uint8_t end_head; /* end head */ | |
748 | uint8_t end_sector; /* end sector */ | |
749 | uint8_t end_cyl; /* end cylinder */ | |
750 | uint32_t start_sect; /* starting sector counting from 0 */ | |
751 | uint32_t nr_sects; /* nr of sectors in partition */ | |
752 | } __attribute__((packed)); | |
753 | ||
754 | /* try to guess the disk logical geometry from the MSDOS partition table. Return 0 if OK, -1 if could not guess */ | |
755 | static int guess_disk_lchs(BlockDriverState *bs, | |
756 | int *pcylinders, int *pheads, int *psectors) | |
757 | { | |
758 | uint8_t buf[512]; | |
759 | int ret, i, heads, sectors, cylinders; | |
760 | struct partition *p; | |
761 | uint32_t nr_sects; | |
a38131b6 | 762 | uint64_t nb_sectors; |
f3d54fc4 AL |
763 | |
764 | bdrv_get_geometry(bs, &nb_sectors); | |
765 | ||
766 | ret = bdrv_read(bs, 0, buf, 1); | |
767 | if (ret < 0) | |
768 | return -1; | |
769 | /* test msdos magic */ | |
770 | if (buf[510] != 0x55 || buf[511] != 0xaa) | |
771 | return -1; | |
772 | for(i = 0; i < 4; i++) { | |
773 | p = ((struct partition *)(buf + 0x1be)) + i; | |
774 | nr_sects = le32_to_cpu(p->nr_sects); | |
775 | if (nr_sects && p->end_head) { | |
776 | /* We make the assumption that the partition terminates on | |
777 | a cylinder boundary */ | |
778 | heads = p->end_head + 1; | |
779 | sectors = p->end_sector & 63; | |
780 | if (sectors == 0) | |
781 | continue; | |
782 | cylinders = nb_sectors / (heads * sectors); | |
783 | if (cylinders < 1 || cylinders > 16383) | |
784 | continue; | |
785 | *pheads = heads; | |
786 | *psectors = sectors; | |
787 | *pcylinders = cylinders; | |
788 | #if 0 | |
789 | printf("guessed geometry: LCHS=%d %d %d\n", | |
790 | cylinders, heads, sectors); | |
791 | #endif | |
792 | return 0; | |
793 | } | |
794 | } | |
795 | return -1; | |
796 | } | |
797 | ||
798 | void bdrv_guess_geometry(BlockDriverState *bs, int *pcyls, int *pheads, int *psecs) | |
799 | { | |
800 | int translation, lba_detected = 0; | |
801 | int cylinders, heads, secs; | |
a38131b6 | 802 | uint64_t nb_sectors; |
f3d54fc4 AL |
803 | |
804 | /* if a geometry hint is available, use it */ | |
805 | bdrv_get_geometry(bs, &nb_sectors); | |
806 | bdrv_get_geometry_hint(bs, &cylinders, &heads, &secs); | |
807 | translation = bdrv_get_translation_hint(bs); | |
808 | if (cylinders != 0) { | |
809 | *pcyls = cylinders; | |
810 | *pheads = heads; | |
811 | *psecs = secs; | |
812 | } else { | |
813 | if (guess_disk_lchs(bs, &cylinders, &heads, &secs) == 0) { | |
814 | if (heads > 16) { | |
815 | /* if heads > 16, it means that a BIOS LBA | |
816 | translation was active, so the default | |
817 | hardware geometry is OK */ | |
818 | lba_detected = 1; | |
819 | goto default_geometry; | |
820 | } else { | |
821 | *pcyls = cylinders; | |
822 | *pheads = heads; | |
823 | *psecs = secs; | |
824 | /* disable any translation to be in sync with | |
825 | the logical geometry */ | |
826 | if (translation == BIOS_ATA_TRANSLATION_AUTO) { | |
827 | bdrv_set_translation_hint(bs, | |
828 | BIOS_ATA_TRANSLATION_NONE); | |
829 | } | |
830 | } | |
831 | } else { | |
832 | default_geometry: | |
833 | /* if no geometry, use a standard physical disk geometry */ | |
834 | cylinders = nb_sectors / (16 * 63); | |
835 | ||
836 | if (cylinders > 16383) | |
837 | cylinders = 16383; | |
838 | else if (cylinders < 2) | |
839 | cylinders = 2; | |
840 | *pcyls = cylinders; | |
841 | *pheads = 16; | |
842 | *psecs = 63; | |
843 | if ((lba_detected == 1) && (translation == BIOS_ATA_TRANSLATION_AUTO)) { | |
844 | if ((*pcyls * *pheads) <= 131072) { | |
845 | bdrv_set_translation_hint(bs, | |
846 | BIOS_ATA_TRANSLATION_LARGE); | |
847 | } else { | |
848 | bdrv_set_translation_hint(bs, | |
849 | BIOS_ATA_TRANSLATION_LBA); | |
850 | } | |
851 | } | |
852 | } | |
853 | bdrv_set_geometry_hint(bs, *pcyls, *pheads, *psecs); | |
854 | } | |
855 | } | |
856 | ||
5fafdf24 | 857 | void bdrv_set_geometry_hint(BlockDriverState *bs, |
b338082b FB |
858 | int cyls, int heads, int secs) |
859 | { | |
860 | bs->cyls = cyls; | |
861 | bs->heads = heads; | |
862 | bs->secs = secs; | |
863 | } | |
864 | ||
865 | void bdrv_set_type_hint(BlockDriverState *bs, int type) | |
866 | { | |
867 | bs->type = type; | |
868 | bs->removable = ((type == BDRV_TYPE_CDROM || | |
869 | type == BDRV_TYPE_FLOPPY)); | |
870 | } | |
871 | ||
46d4767d FB |
872 | void bdrv_set_translation_hint(BlockDriverState *bs, int translation) |
873 | { | |
874 | bs->translation = translation; | |
875 | } | |
876 | ||
5fafdf24 | 877 | void bdrv_get_geometry_hint(BlockDriverState *bs, |
b338082b FB |
878 | int *pcyls, int *pheads, int *psecs) |
879 | { | |
880 | *pcyls = bs->cyls; | |
881 | *pheads = bs->heads; | |
882 | *psecs = bs->secs; | |
883 | } | |
884 | ||
885 | int bdrv_get_type_hint(BlockDriverState *bs) | |
886 | { | |
887 | return bs->type; | |
888 | } | |
889 | ||
46d4767d FB |
890 | int bdrv_get_translation_hint(BlockDriverState *bs) |
891 | { | |
892 | return bs->translation; | |
893 | } | |
894 | ||
b338082b FB |
895 | int bdrv_is_removable(BlockDriverState *bs) |
896 | { | |
897 | return bs->removable; | |
898 | } | |
899 | ||
900 | int bdrv_is_read_only(BlockDriverState *bs) | |
901 | { | |
902 | return bs->read_only; | |
903 | } | |
904 | ||
985a03b0 TS |
905 | int bdrv_is_sg(BlockDriverState *bs) |
906 | { | |
907 | return bs->sg; | |
908 | } | |
909 | ||
19cb3738 | 910 | /* XXX: no longer used */ |
5fafdf24 | 911 | void bdrv_set_change_cb(BlockDriverState *bs, |
b338082b FB |
912 | void (*change_cb)(void *opaque), void *opaque) |
913 | { | |
914 | bs->change_cb = change_cb; | |
915 | bs->change_opaque = opaque; | |
916 | } | |
917 | ||
ea2384d3 FB |
918 | int bdrv_is_encrypted(BlockDriverState *bs) |
919 | { | |
920 | if (bs->backing_hd && bs->backing_hd->encrypted) | |
921 | return 1; | |
922 | return bs->encrypted; | |
923 | } | |
924 | ||
c0f4ce77 AL |
925 | int bdrv_key_required(BlockDriverState *bs) |
926 | { | |
927 | BlockDriverState *backing_hd = bs->backing_hd; | |
928 | ||
929 | if (backing_hd && backing_hd->encrypted && !backing_hd->valid_key) | |
930 | return 1; | |
931 | return (bs->encrypted && !bs->valid_key); | |
932 | } | |
933 | ||
ea2384d3 FB |
934 | int bdrv_set_key(BlockDriverState *bs, const char *key) |
935 | { | |
936 | int ret; | |
937 | if (bs->backing_hd && bs->backing_hd->encrypted) { | |
938 | ret = bdrv_set_key(bs->backing_hd, key); | |
939 | if (ret < 0) | |
940 | return ret; | |
941 | if (!bs->encrypted) | |
942 | return 0; | |
943 | } | |
944 | if (!bs->encrypted || !bs->drv || !bs->drv->bdrv_set_key) | |
945 | return -1; | |
c0f4ce77 | 946 | ret = bs->drv->bdrv_set_key(bs, key); |
bb5fc20f AL |
947 | if (ret < 0) { |
948 | bs->valid_key = 0; | |
949 | } else if (!bs->valid_key) { | |
950 | bs->valid_key = 1; | |
951 | /* call the change callback now, we skipped it on open */ | |
952 | bs->media_changed = 1; | |
953 | if (bs->change_cb) | |
954 | bs->change_cb(bs->change_opaque); | |
955 | } | |
c0f4ce77 | 956 | return ret; |
ea2384d3 FB |
957 | } |
958 | ||
959 | void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size) | |
960 | { | |
19cb3738 | 961 | if (!bs->drv) { |
ea2384d3 FB |
962 | buf[0] = '\0'; |
963 | } else { | |
964 | pstrcpy(buf, buf_size, bs->drv->format_name); | |
965 | } | |
966 | } | |
967 | ||
5fafdf24 | 968 | void bdrv_iterate_format(void (*it)(void *opaque, const char *name), |
ea2384d3 FB |
969 | void *opaque) |
970 | { | |
971 | BlockDriver *drv; | |
972 | ||
973 | for (drv = first_drv; drv != NULL; drv = drv->next) { | |
974 | it(opaque, drv->format_name); | |
975 | } | |
976 | } | |
977 | ||
b338082b FB |
978 | BlockDriverState *bdrv_find(const char *name) |
979 | { | |
980 | BlockDriverState *bs; | |
981 | ||
982 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { | |
983 | if (!strcmp(name, bs->device_name)) | |
984 | return bs; | |
985 | } | |
986 | return NULL; | |
987 | } | |
988 | ||
51de9760 | 989 | void bdrv_iterate(void (*it)(void *opaque, BlockDriverState *bs), void *opaque) |
81d0912d FB |
990 | { |
991 | BlockDriverState *bs; | |
992 | ||
993 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { | |
51de9760 | 994 | it(opaque, bs); |
81d0912d FB |
995 | } |
996 | } | |
997 | ||
ea2384d3 FB |
998 | const char *bdrv_get_device_name(BlockDriverState *bs) |
999 | { | |
1000 | return bs->device_name; | |
1001 | } | |
1002 | ||
7a6cba61 PB |
1003 | void bdrv_flush(BlockDriverState *bs) |
1004 | { | |
081501da AL |
1005 | if (!bs->drv) |
1006 | return; | |
7a6cba61 PB |
1007 | if (bs->drv->bdrv_flush) |
1008 | bs->drv->bdrv_flush(bs); | |
1009 | if (bs->backing_hd) | |
1010 | bdrv_flush(bs->backing_hd); | |
1011 | } | |
1012 | ||
c6ca28d6 AL |
1013 | void bdrv_flush_all(void) |
1014 | { | |
1015 | BlockDriverState *bs; | |
1016 | ||
1017 | for (bs = bdrv_first; bs != NULL; bs = bs->next) | |
1018 | if (bs->drv && !bdrv_is_read_only(bs) && | |
1019 | (!bdrv_is_removable(bs) || bdrv_is_inserted(bs))) | |
1020 | bdrv_flush(bs); | |
1021 | } | |
1022 | ||
f58c7b35 TS |
1023 | /* |
1024 | * Returns true iff the specified sector is present in the disk image. Drivers | |
1025 | * not implementing the functionality are assumed to not support backing files, | |
1026 | * hence all their sectors are reported as allocated. | |
1027 | * | |
1028 | * 'pnum' is set to the number of sectors (including and immediately following | |
1029 | * the specified sector) that are known to be in the same | |
1030 | * allocated/unallocated state. | |
1031 | * | |
1032 | * 'nb_sectors' is the max value 'pnum' should be set to. | |
1033 | */ | |
1034 | int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, | |
1035 | int *pnum) | |
1036 | { | |
1037 | int64_t n; | |
1038 | if (!bs->drv->bdrv_is_allocated) { | |
1039 | if (sector_num >= bs->total_sectors) { | |
1040 | *pnum = 0; | |
1041 | return 0; | |
1042 | } | |
1043 | n = bs->total_sectors - sector_num; | |
1044 | *pnum = (n < nb_sectors) ? (n) : (nb_sectors); | |
1045 | return 1; | |
1046 | } | |
1047 | return bs->drv->bdrv_is_allocated(bs, sector_num, nb_sectors, pnum); | |
1048 | } | |
1049 | ||
376253ec | 1050 | void bdrv_info(Monitor *mon) |
b338082b FB |
1051 | { |
1052 | BlockDriverState *bs; | |
1053 | ||
1054 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { | |
376253ec AL |
1055 | monitor_printf(mon, "%s:", bs->device_name); |
1056 | monitor_printf(mon, " type="); | |
b338082b FB |
1057 | switch(bs->type) { |
1058 | case BDRV_TYPE_HD: | |
376253ec | 1059 | monitor_printf(mon, "hd"); |
b338082b FB |
1060 | break; |
1061 | case BDRV_TYPE_CDROM: | |
376253ec | 1062 | monitor_printf(mon, "cdrom"); |
b338082b FB |
1063 | break; |
1064 | case BDRV_TYPE_FLOPPY: | |
376253ec | 1065 | monitor_printf(mon, "floppy"); |
b338082b FB |
1066 | break; |
1067 | } | |
376253ec | 1068 | monitor_printf(mon, " removable=%d", bs->removable); |
b338082b | 1069 | if (bs->removable) { |
376253ec | 1070 | monitor_printf(mon, " locked=%d", bs->locked); |
b338082b | 1071 | } |
19cb3738 | 1072 | if (bs->drv) { |
376253ec AL |
1073 | monitor_printf(mon, " file="); |
1074 | monitor_print_filename(mon, bs->filename); | |
fef30743 | 1075 | if (bs->backing_file[0] != '\0') { |
376253ec AL |
1076 | monitor_printf(mon, " backing_file="); |
1077 | monitor_print_filename(mon, bs->backing_file); | |
1078 | } | |
1079 | monitor_printf(mon, " ro=%d", bs->read_only); | |
1080 | monitor_printf(mon, " drv=%s", bs->drv->format_name); | |
1081 | monitor_printf(mon, " encrypted=%d", bdrv_is_encrypted(bs)); | |
b338082b | 1082 | } else { |
376253ec | 1083 | monitor_printf(mon, " [not inserted]"); |
b338082b | 1084 | } |
376253ec | 1085 | monitor_printf(mon, "\n"); |
b338082b FB |
1086 | } |
1087 | } | |
a36e69dd TS |
1088 | |
1089 | /* The "info blockstats" command. */ | |
376253ec | 1090 | void bdrv_info_stats(Monitor *mon) |
a36e69dd TS |
1091 | { |
1092 | BlockDriverState *bs; | |
1093 | ||
1094 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { | |
376253ec AL |
1095 | monitor_printf(mon, "%s:" |
1096 | " rd_bytes=%" PRIu64 | |
1097 | " wr_bytes=%" PRIu64 | |
1098 | " rd_operations=%" PRIu64 | |
1099 | " wr_operations=%" PRIu64 | |
ebf53fcd | 1100 | "\n", |
376253ec AL |
1101 | bs->device_name, |
1102 | bs->rd_bytes, bs->wr_bytes, | |
1103 | bs->rd_ops, bs->wr_ops); | |
a36e69dd TS |
1104 | } |
1105 | } | |
ea2384d3 | 1106 | |
045df330 AL |
1107 | const char *bdrv_get_encrypted_filename(BlockDriverState *bs) |
1108 | { | |
1109 | if (bs->backing_hd && bs->backing_hd->encrypted) | |
1110 | return bs->backing_file; | |
1111 | else if (bs->encrypted) | |
1112 | return bs->filename; | |
1113 | else | |
1114 | return NULL; | |
1115 | } | |
1116 | ||
5fafdf24 | 1117 | void bdrv_get_backing_filename(BlockDriverState *bs, |
83f64091 FB |
1118 | char *filename, int filename_size) |
1119 | { | |
1120 | if (!bs->backing_hd) { | |
1121 | pstrcpy(filename, filename_size, ""); | |
1122 | } else { | |
1123 | pstrcpy(filename, filename_size, bs->backing_file); | |
1124 | } | |
1125 | } | |
1126 | ||
5fafdf24 | 1127 | int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num, |
faea38e7 FB |
1128 | const uint8_t *buf, int nb_sectors) |
1129 | { | |
1130 | BlockDriver *drv = bs->drv; | |
1131 | if (!drv) | |
19cb3738 | 1132 | return -ENOMEDIUM; |
faea38e7 FB |
1133 | if (!drv->bdrv_write_compressed) |
1134 | return -ENOTSUP; | |
1135 | return drv->bdrv_write_compressed(bs, sector_num, buf, nb_sectors); | |
1136 | } | |
3b46e624 | 1137 | |
faea38e7 FB |
1138 | int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) |
1139 | { | |
1140 | BlockDriver *drv = bs->drv; | |
1141 | if (!drv) | |
19cb3738 | 1142 | return -ENOMEDIUM; |
faea38e7 FB |
1143 | if (!drv->bdrv_get_info) |
1144 | return -ENOTSUP; | |
1145 | memset(bdi, 0, sizeof(*bdi)); | |
1146 | return drv->bdrv_get_info(bs, bdi); | |
1147 | } | |
1148 | ||
178e08a5 AL |
1149 | int bdrv_put_buffer(BlockDriverState *bs, const uint8_t *buf, int64_t pos, int size) |
1150 | { | |
1151 | BlockDriver *drv = bs->drv; | |
1152 | if (!drv) | |
1153 | return -ENOMEDIUM; | |
1154 | if (!drv->bdrv_put_buffer) | |
1155 | return -ENOTSUP; | |
1156 | return drv->bdrv_put_buffer(bs, buf, pos, size); | |
1157 | } | |
1158 | ||
1159 | int bdrv_get_buffer(BlockDriverState *bs, uint8_t *buf, int64_t pos, int size) | |
1160 | { | |
1161 | BlockDriver *drv = bs->drv; | |
1162 | if (!drv) | |
1163 | return -ENOMEDIUM; | |
1164 | if (!drv->bdrv_get_buffer) | |
1165 | return -ENOTSUP; | |
1166 | return drv->bdrv_get_buffer(bs, buf, pos, size); | |
1167 | } | |
1168 | ||
faea38e7 FB |
1169 | /**************************************************************/ |
1170 | /* handling of snapshots */ | |
1171 | ||
5fafdf24 | 1172 | int bdrv_snapshot_create(BlockDriverState *bs, |
faea38e7 FB |
1173 | QEMUSnapshotInfo *sn_info) |
1174 | { | |
1175 | BlockDriver *drv = bs->drv; | |
1176 | if (!drv) | |
19cb3738 | 1177 | return -ENOMEDIUM; |
faea38e7 FB |
1178 | if (!drv->bdrv_snapshot_create) |
1179 | return -ENOTSUP; | |
1180 | return drv->bdrv_snapshot_create(bs, sn_info); | |
1181 | } | |
1182 | ||
5fafdf24 | 1183 | int bdrv_snapshot_goto(BlockDriverState *bs, |
faea38e7 FB |
1184 | const char *snapshot_id) |
1185 | { | |
1186 | BlockDriver *drv = bs->drv; | |
1187 | if (!drv) | |
19cb3738 | 1188 | return -ENOMEDIUM; |
faea38e7 FB |
1189 | if (!drv->bdrv_snapshot_goto) |
1190 | return -ENOTSUP; | |
1191 | return drv->bdrv_snapshot_goto(bs, snapshot_id); | |
1192 | } | |
1193 | ||
1194 | int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id) | |
1195 | { | |
1196 | BlockDriver *drv = bs->drv; | |
1197 | if (!drv) | |
19cb3738 | 1198 | return -ENOMEDIUM; |
faea38e7 FB |
1199 | if (!drv->bdrv_snapshot_delete) |
1200 | return -ENOTSUP; | |
1201 | return drv->bdrv_snapshot_delete(bs, snapshot_id); | |
1202 | } | |
1203 | ||
5fafdf24 | 1204 | int bdrv_snapshot_list(BlockDriverState *bs, |
faea38e7 FB |
1205 | QEMUSnapshotInfo **psn_info) |
1206 | { | |
1207 | BlockDriver *drv = bs->drv; | |
1208 | if (!drv) | |
19cb3738 | 1209 | return -ENOMEDIUM; |
faea38e7 FB |
1210 | if (!drv->bdrv_snapshot_list) |
1211 | return -ENOTSUP; | |
1212 | return drv->bdrv_snapshot_list(bs, psn_info); | |
1213 | } | |
1214 | ||
1215 | #define NB_SUFFIXES 4 | |
1216 | ||
1217 | char *get_human_readable_size(char *buf, int buf_size, int64_t size) | |
1218 | { | |
1219 | static const char suffixes[NB_SUFFIXES] = "KMGT"; | |
1220 | int64_t base; | |
1221 | int i; | |
1222 | ||
1223 | if (size <= 999) { | |
1224 | snprintf(buf, buf_size, "%" PRId64, size); | |
1225 | } else { | |
1226 | base = 1024; | |
1227 | for(i = 0; i < NB_SUFFIXES; i++) { | |
1228 | if (size < (10 * base)) { | |
5fafdf24 | 1229 | snprintf(buf, buf_size, "%0.1f%c", |
faea38e7 FB |
1230 | (double)size / base, |
1231 | suffixes[i]); | |
1232 | break; | |
1233 | } else if (size < (1000 * base) || i == (NB_SUFFIXES - 1)) { | |
5fafdf24 | 1234 | snprintf(buf, buf_size, "%" PRId64 "%c", |
faea38e7 FB |
1235 | ((size + (base >> 1)) / base), |
1236 | suffixes[i]); | |
1237 | break; | |
1238 | } | |
1239 | base = base * 1024; | |
1240 | } | |
1241 | } | |
1242 | return buf; | |
1243 | } | |
1244 | ||
1245 | char *bdrv_snapshot_dump(char *buf, int buf_size, QEMUSnapshotInfo *sn) | |
1246 | { | |
1247 | char buf1[128], date_buf[128], clock_buf[128]; | |
3b9f94e1 FB |
1248 | #ifdef _WIN32 |
1249 | struct tm *ptm; | |
1250 | #else | |
faea38e7 | 1251 | struct tm tm; |
3b9f94e1 | 1252 | #endif |
faea38e7 FB |
1253 | time_t ti; |
1254 | int64_t secs; | |
1255 | ||
1256 | if (!sn) { | |
5fafdf24 TS |
1257 | snprintf(buf, buf_size, |
1258 | "%-10s%-20s%7s%20s%15s", | |
faea38e7 FB |
1259 | "ID", "TAG", "VM SIZE", "DATE", "VM CLOCK"); |
1260 | } else { | |
1261 | ti = sn->date_sec; | |
3b9f94e1 FB |
1262 | #ifdef _WIN32 |
1263 | ptm = localtime(&ti); | |
1264 | strftime(date_buf, sizeof(date_buf), | |
1265 | "%Y-%m-%d %H:%M:%S", ptm); | |
1266 | #else | |
faea38e7 FB |
1267 | localtime_r(&ti, &tm); |
1268 | strftime(date_buf, sizeof(date_buf), | |
1269 | "%Y-%m-%d %H:%M:%S", &tm); | |
3b9f94e1 | 1270 | #endif |
faea38e7 FB |
1271 | secs = sn->vm_clock_nsec / 1000000000; |
1272 | snprintf(clock_buf, sizeof(clock_buf), | |
1273 | "%02d:%02d:%02d.%03d", | |
1274 | (int)(secs / 3600), | |
1275 | (int)((secs / 60) % 60), | |
5fafdf24 | 1276 | (int)(secs % 60), |
faea38e7 FB |
1277 | (int)((sn->vm_clock_nsec / 1000000) % 1000)); |
1278 | snprintf(buf, buf_size, | |
5fafdf24 | 1279 | "%-10s%-20s%7s%20s%15s", |
faea38e7 FB |
1280 | sn->id_str, sn->name, |
1281 | get_human_readable_size(buf1, sizeof(buf1), sn->vm_state_size), | |
1282 | date_buf, | |
1283 | clock_buf); | |
1284 | } | |
1285 | return buf; | |
1286 | } | |
1287 | ||
83f64091 | 1288 | |
ea2384d3 | 1289 | /**************************************************************/ |
83f64091 | 1290 | /* async I/Os */ |
ea2384d3 | 1291 | |
3fb94d56 AL |
1292 | typedef struct VectorTranslationAIOCB { |
1293 | BlockDriverAIOCB common; | |
3b69e4b9 AL |
1294 | QEMUIOVector *iov; |
1295 | uint8_t *bounce; | |
1296 | int is_write; | |
1297 | BlockDriverAIOCB *aiocb; | |
3fb94d56 | 1298 | } VectorTranslationAIOCB; |
3b69e4b9 | 1299 | |
3fb94d56 | 1300 | static void bdrv_aio_cancel_vector(BlockDriverAIOCB *_acb) |
c07a9008 | 1301 | { |
3fb94d56 AL |
1302 | VectorTranslationAIOCB *acb |
1303 | = container_of(_acb, VectorTranslationAIOCB, common); | |
c07a9008 | 1304 | |
3fb94d56 | 1305 | bdrv_aio_cancel(acb->aiocb); |
c07a9008 AL |
1306 | } |
1307 | ||
3b69e4b9 AL |
1308 | static void bdrv_aio_rw_vector_cb(void *opaque, int ret) |
1309 | { | |
3fb94d56 | 1310 | VectorTranslationAIOCB *s = (VectorTranslationAIOCB *)opaque; |
3b69e4b9 AL |
1311 | |
1312 | if (!s->is_write) { | |
249aa745 | 1313 | qemu_iovec_from_buffer(s->iov, s->bounce, s->iov->size); |
3b69e4b9 | 1314 | } |
d905dba4 | 1315 | qemu_vfree(s->bounce); |
3fb94d56 AL |
1316 | s->common.cb(s->common.opaque, ret); |
1317 | qemu_aio_release(s); | |
3b69e4b9 AL |
1318 | } |
1319 | ||
1320 | static BlockDriverAIOCB *bdrv_aio_rw_vector(BlockDriverState *bs, | |
1321 | int64_t sector_num, | |
1322 | QEMUIOVector *iov, | |
1323 | int nb_sectors, | |
1324 | BlockDriverCompletionFunc *cb, | |
1325 | void *opaque, | |
1326 | int is_write) | |
1327 | ||
1328 | { | |
3fb94d56 AL |
1329 | VectorTranslationAIOCB *s = qemu_aio_get_pool(&vectored_aio_pool, bs, |
1330 | cb, opaque); | |
3b69e4b9 | 1331 | |
3b69e4b9 AL |
1332 | s->iov = iov; |
1333 | s->bounce = qemu_memalign(512, nb_sectors * 512); | |
1334 | s->is_write = is_write; | |
1335 | if (is_write) { | |
1336 | qemu_iovec_to_buffer(s->iov, s->bounce); | |
1337 | s->aiocb = bdrv_aio_write(bs, sector_num, s->bounce, nb_sectors, | |
1338 | bdrv_aio_rw_vector_cb, s); | |
1339 | } else { | |
1340 | s->aiocb = bdrv_aio_read(bs, sector_num, s->bounce, nb_sectors, | |
1341 | bdrv_aio_rw_vector_cb, s); | |
1342 | } | |
c240b9af AL |
1343 | if (!s->aiocb) { |
1344 | qemu_vfree(s->bounce); | |
1345 | qemu_aio_release(s); | |
1346 | return NULL; | |
1347 | } | |
3fb94d56 | 1348 | return &s->common; |
3b69e4b9 AL |
1349 | } |
1350 | ||
1351 | BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num, | |
1352 | QEMUIOVector *iov, int nb_sectors, | |
1353 | BlockDriverCompletionFunc *cb, void *opaque) | |
1354 | { | |
71d0770c AL |
1355 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
1356 | return NULL; | |
1357 | ||
3b69e4b9 AL |
1358 | return bdrv_aio_rw_vector(bs, sector_num, iov, nb_sectors, |
1359 | cb, opaque, 0); | |
1360 | } | |
1361 | ||
1362 | BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num, | |
1363 | QEMUIOVector *iov, int nb_sectors, | |
1364 | BlockDriverCompletionFunc *cb, void *opaque) | |
1365 | { | |
71d0770c AL |
1366 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
1367 | return NULL; | |
1368 | ||
3b69e4b9 AL |
1369 | return bdrv_aio_rw_vector(bs, sector_num, iov, nb_sectors, |
1370 | cb, opaque, 1); | |
1371 | } | |
1372 | ||
ce1a14dc PB |
1373 | BlockDriverAIOCB *bdrv_aio_read(BlockDriverState *bs, int64_t sector_num, |
1374 | uint8_t *buf, int nb_sectors, | |
1375 | BlockDriverCompletionFunc *cb, void *opaque) | |
83f64091 FB |
1376 | { |
1377 | BlockDriver *drv = bs->drv; | |
a36e69dd | 1378 | BlockDriverAIOCB *ret; |
83f64091 | 1379 | |
19cb3738 | 1380 | if (!drv) |
ce1a14dc | 1381 | return NULL; |
71d0770c AL |
1382 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
1383 | return NULL; | |
3b46e624 | 1384 | |
a36e69dd TS |
1385 | ret = drv->bdrv_aio_read(bs, sector_num, buf, nb_sectors, cb, opaque); |
1386 | ||
1387 | if (ret) { | |
1388 | /* Update stats even though technically transfer has not happened. */ | |
1389 | bs->rd_bytes += (unsigned) nb_sectors * SECTOR_SIZE; | |
1390 | bs->rd_ops ++; | |
1391 | } | |
1392 | ||
1393 | return ret; | |
ea2384d3 FB |
1394 | } |
1395 | ||
ce1a14dc PB |
1396 | BlockDriverAIOCB *bdrv_aio_write(BlockDriverState *bs, int64_t sector_num, |
1397 | const uint8_t *buf, int nb_sectors, | |
1398 | BlockDriverCompletionFunc *cb, void *opaque) | |
ea2384d3 | 1399 | { |
83f64091 | 1400 | BlockDriver *drv = bs->drv; |
a36e69dd | 1401 | BlockDriverAIOCB *ret; |
ea2384d3 | 1402 | |
19cb3738 | 1403 | if (!drv) |
ce1a14dc | 1404 | return NULL; |
83f64091 | 1405 | if (bs->read_only) |
ce1a14dc | 1406 | return NULL; |
71d0770c AL |
1407 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
1408 | return NULL; | |
83f64091 | 1409 | |
a36e69dd TS |
1410 | ret = drv->bdrv_aio_write(bs, sector_num, buf, nb_sectors, cb, opaque); |
1411 | ||
1412 | if (ret) { | |
1413 | /* Update stats even though technically transfer has not happened. */ | |
1414 | bs->wr_bytes += (unsigned) nb_sectors * SECTOR_SIZE; | |
1415 | bs->wr_ops ++; | |
1416 | } | |
1417 | ||
1418 | return ret; | |
83f64091 FB |
1419 | } |
1420 | ||
1421 | void bdrv_aio_cancel(BlockDriverAIOCB *acb) | |
83f64091 | 1422 | { |
6bbff9a0 | 1423 | acb->pool->cancel(acb); |
83f64091 FB |
1424 | } |
1425 | ||
ce1a14dc | 1426 | |
83f64091 FB |
1427 | /**************************************************************/ |
1428 | /* async block device emulation */ | |
1429 | ||
ce1a14dc | 1430 | static void bdrv_aio_bh_cb(void *opaque) |
83f64091 | 1431 | { |
ce1a14dc PB |
1432 | BlockDriverAIOCBSync *acb = opaque; |
1433 | acb->common.cb(acb->common.opaque, acb->ret); | |
1434 | qemu_aio_release(acb); | |
83f64091 | 1435 | } |
beac80cd | 1436 | |
ce1a14dc PB |
1437 | static BlockDriverAIOCB *bdrv_aio_read_em(BlockDriverState *bs, |
1438 | int64_t sector_num, uint8_t *buf, int nb_sectors, | |
1439 | BlockDriverCompletionFunc *cb, void *opaque) | |
83f64091 | 1440 | { |
ce1a14dc | 1441 | BlockDriverAIOCBSync *acb; |
83f64091 | 1442 | int ret; |
ce1a14dc PB |
1443 | |
1444 | acb = qemu_aio_get(bs, cb, opaque); | |
1445 | if (!acb->bh) | |
1446 | acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); | |
1447 | ret = bdrv_read(bs, sector_num, buf, nb_sectors); | |
1448 | acb->ret = ret; | |
1449 | qemu_bh_schedule(acb->bh); | |
1450 | return &acb->common; | |
beac80cd FB |
1451 | } |
1452 | ||
ce1a14dc PB |
1453 | static BlockDriverAIOCB *bdrv_aio_write_em(BlockDriverState *bs, |
1454 | int64_t sector_num, const uint8_t *buf, int nb_sectors, | |
1455 | BlockDriverCompletionFunc *cb, void *opaque) | |
beac80cd | 1456 | { |
ce1a14dc | 1457 | BlockDriverAIOCBSync *acb; |
83f64091 | 1458 | int ret; |
83f64091 | 1459 | |
ce1a14dc PB |
1460 | acb = qemu_aio_get(bs, cb, opaque); |
1461 | if (!acb->bh) | |
1462 | acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); | |
1463 | ret = bdrv_write(bs, sector_num, buf, nb_sectors); | |
1464 | acb->ret = ret; | |
1465 | qemu_bh_schedule(acb->bh); | |
1466 | return &acb->common; | |
beac80cd | 1467 | } |
beac80cd | 1468 | |
ce1a14dc | 1469 | static void bdrv_aio_cancel_em(BlockDriverAIOCB *blockacb) |
ea2384d3 | 1470 | { |
ce1a14dc PB |
1471 | BlockDriverAIOCBSync *acb = (BlockDriverAIOCBSync *)blockacb; |
1472 | qemu_bh_cancel(acb->bh); | |
1473 | qemu_aio_release(acb); | |
83f64091 | 1474 | } |
ea2384d3 | 1475 | |
83f64091 FB |
1476 | /**************************************************************/ |
1477 | /* sync block device emulation */ | |
ea2384d3 | 1478 | |
83f64091 FB |
1479 | static void bdrv_rw_em_cb(void *opaque, int ret) |
1480 | { | |
1481 | *(int *)opaque = ret; | |
ea2384d3 FB |
1482 | } |
1483 | ||
83f64091 FB |
1484 | #define NOT_DONE 0x7fffffff |
1485 | ||
5fafdf24 | 1486 | static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
83f64091 | 1487 | uint8_t *buf, int nb_sectors) |
7a6cba61 | 1488 | { |
ce1a14dc PB |
1489 | int async_ret; |
1490 | BlockDriverAIOCB *acb; | |
83f64091 | 1491 | |
83f64091 | 1492 | async_ret = NOT_DONE; |
5fafdf24 | 1493 | acb = bdrv_aio_read(bs, sector_num, buf, nb_sectors, |
83f64091 | 1494 | bdrv_rw_em_cb, &async_ret); |
baf35cb9 | 1495 | if (acb == NULL) |
ce1a14dc | 1496 | return -1; |
baf35cb9 | 1497 | |
83f64091 FB |
1498 | while (async_ret == NOT_DONE) { |
1499 | qemu_aio_wait(); | |
1500 | } | |
baf35cb9 | 1501 | |
83f64091 | 1502 | return async_ret; |
7a6cba61 PB |
1503 | } |
1504 | ||
83f64091 FB |
1505 | static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, |
1506 | const uint8_t *buf, int nb_sectors) | |
1507 | { | |
ce1a14dc PB |
1508 | int async_ret; |
1509 | BlockDriverAIOCB *acb; | |
83f64091 | 1510 | |
83f64091 | 1511 | async_ret = NOT_DONE; |
5fafdf24 | 1512 | acb = bdrv_aio_write(bs, sector_num, buf, nb_sectors, |
83f64091 | 1513 | bdrv_rw_em_cb, &async_ret); |
baf35cb9 | 1514 | if (acb == NULL) |
ce1a14dc | 1515 | return -1; |
83f64091 FB |
1516 | while (async_ret == NOT_DONE) { |
1517 | qemu_aio_wait(); | |
1518 | } | |
83f64091 FB |
1519 | return async_ret; |
1520 | } | |
ea2384d3 FB |
1521 | |
1522 | void bdrv_init(void) | |
1523 | { | |
3fb94d56 | 1524 | aio_pool_init(&vectored_aio_pool, sizeof(VectorTranslationAIOCB), |
c07a9008 AL |
1525 | bdrv_aio_cancel_vector); |
1526 | ||
ea2384d3 | 1527 | bdrv_register(&bdrv_raw); |
19cb3738 | 1528 | bdrv_register(&bdrv_host_device); |
ea2384d3 FB |
1529 | #ifndef _WIN32 |
1530 | bdrv_register(&bdrv_cow); | |
1531 | #endif | |
1532 | bdrv_register(&bdrv_qcow); | |
1533 | bdrv_register(&bdrv_vmdk); | |
3c56521b | 1534 | bdrv_register(&bdrv_cloop); |
585d0ed9 | 1535 | bdrv_register(&bdrv_dmg); |
a8753c34 | 1536 | bdrv_register(&bdrv_bochs); |
6a0f9e82 | 1537 | bdrv_register(&bdrv_vpc); |
712e7874 | 1538 | bdrv_register(&bdrv_vvfat); |
faea38e7 | 1539 | bdrv_register(&bdrv_qcow2); |
6ada7453 | 1540 | bdrv_register(&bdrv_parallels); |
75818250 | 1541 | bdrv_register(&bdrv_nbd); |
ea2384d3 | 1542 | } |
ce1a14dc | 1543 | |
6bbff9a0 AL |
1544 | void aio_pool_init(AIOPool *pool, int aiocb_size, |
1545 | void (*cancel)(BlockDriverAIOCB *acb)) | |
1546 | { | |
1547 | pool->aiocb_size = aiocb_size; | |
1548 | pool->cancel = cancel; | |
1549 | pool->free_aiocb = NULL; | |
1550 | } | |
1551 | ||
1552 | void *qemu_aio_get_pool(AIOPool *pool, BlockDriverState *bs, | |
1553 | BlockDriverCompletionFunc *cb, void *opaque) | |
ce1a14dc | 1554 | { |
ce1a14dc PB |
1555 | BlockDriverAIOCB *acb; |
1556 | ||
6bbff9a0 AL |
1557 | if (pool->free_aiocb) { |
1558 | acb = pool->free_aiocb; | |
1559 | pool->free_aiocb = acb->next; | |
ce1a14dc | 1560 | } else { |
6bbff9a0 AL |
1561 | acb = qemu_mallocz(pool->aiocb_size); |
1562 | acb->pool = pool; | |
ce1a14dc PB |
1563 | } |
1564 | acb->bs = bs; | |
1565 | acb->cb = cb; | |
1566 | acb->opaque = opaque; | |
1567 | return acb; | |
1568 | } | |
1569 | ||
6bbff9a0 AL |
1570 | void *qemu_aio_get(BlockDriverState *bs, BlockDriverCompletionFunc *cb, |
1571 | void *opaque) | |
1572 | { | |
1573 | return qemu_aio_get_pool(&bs->drv->aio_pool, bs, cb, opaque); | |
1574 | } | |
1575 | ||
ce1a14dc PB |
1576 | void qemu_aio_release(void *p) |
1577 | { | |
6bbff9a0 AL |
1578 | BlockDriverAIOCB *acb = (BlockDriverAIOCB *)p; |
1579 | AIOPool *pool = acb->pool; | |
1580 | acb->next = pool->free_aiocb; | |
1581 | pool->free_aiocb = acb; | |
ce1a14dc | 1582 | } |
19cb3738 FB |
1583 | |
1584 | /**************************************************************/ | |
1585 | /* removable device support */ | |
1586 | ||
1587 | /** | |
1588 | * Return TRUE if the media is present | |
1589 | */ | |
1590 | int bdrv_is_inserted(BlockDriverState *bs) | |
1591 | { | |
1592 | BlockDriver *drv = bs->drv; | |
1593 | int ret; | |
1594 | if (!drv) | |
1595 | return 0; | |
1596 | if (!drv->bdrv_is_inserted) | |
1597 | return 1; | |
1598 | ret = drv->bdrv_is_inserted(bs); | |
1599 | return ret; | |
1600 | } | |
1601 | ||
1602 | /** | |
1603 | * Return TRUE if the media changed since the last call to this | |
5fafdf24 | 1604 | * function. It is currently only used for floppy disks |
19cb3738 FB |
1605 | */ |
1606 | int bdrv_media_changed(BlockDriverState *bs) | |
1607 | { | |
1608 | BlockDriver *drv = bs->drv; | |
1609 | int ret; | |
1610 | ||
1611 | if (!drv || !drv->bdrv_media_changed) | |
1612 | ret = -ENOTSUP; | |
1613 | else | |
1614 | ret = drv->bdrv_media_changed(bs); | |
1615 | if (ret == -ENOTSUP) | |
1616 | ret = bs->media_changed; | |
1617 | bs->media_changed = 0; | |
1618 | return ret; | |
1619 | } | |
1620 | ||
1621 | /** | |
1622 | * If eject_flag is TRUE, eject the media. Otherwise, close the tray | |
1623 | */ | |
1624 | void bdrv_eject(BlockDriverState *bs, int eject_flag) | |
1625 | { | |
1626 | BlockDriver *drv = bs->drv; | |
1627 | int ret; | |
1628 | ||
1629 | if (!drv || !drv->bdrv_eject) { | |
1630 | ret = -ENOTSUP; | |
1631 | } else { | |
1632 | ret = drv->bdrv_eject(bs, eject_flag); | |
1633 | } | |
1634 | if (ret == -ENOTSUP) { | |
1635 | if (eject_flag) | |
1636 | bdrv_close(bs); | |
1637 | } | |
1638 | } | |
1639 | ||
1640 | int bdrv_is_locked(BlockDriverState *bs) | |
1641 | { | |
1642 | return bs->locked; | |
1643 | } | |
1644 | ||
1645 | /** | |
1646 | * Lock or unlock the media (if it is locked, the user won't be able | |
1647 | * to eject it manually). | |
1648 | */ | |
1649 | void bdrv_set_locked(BlockDriverState *bs, int locked) | |
1650 | { | |
1651 | BlockDriver *drv = bs->drv; | |
1652 | ||
1653 | bs->locked = locked; | |
1654 | if (drv && drv->bdrv_set_locked) { | |
1655 | drv->bdrv_set_locked(bs, locked); | |
1656 | } | |
1657 | } | |
985a03b0 TS |
1658 | |
1659 | /* needed for generic scsi interface */ | |
1660 | ||
1661 | int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) | |
1662 | { | |
1663 | BlockDriver *drv = bs->drv; | |
1664 | ||
1665 | if (drv && drv->bdrv_ioctl) | |
1666 | return drv->bdrv_ioctl(bs, req, buf); | |
1667 | return -ENOTSUP; | |
1668 | } | |
7d780669 | 1669 | |
221f715d AL |
1670 | BlockDriverAIOCB *bdrv_aio_ioctl(BlockDriverState *bs, |
1671 | unsigned long int req, void *buf, | |
1672 | BlockDriverCompletionFunc *cb, void *opaque) | |
7d780669 | 1673 | { |
221f715d | 1674 | BlockDriver *drv = bs->drv; |
7d780669 | 1675 | |
221f715d AL |
1676 | if (drv && drv->bdrv_aio_ioctl) |
1677 | return drv->bdrv_aio_ioctl(bs, req, buf, cb, opaque); | |
1678 | return NULL; | |
7d780669 | 1679 | } |