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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 | ||
90765429 FB |
50 | typedef struct BlockDriverAIOCBSync { |
51 | BlockDriverAIOCB common; | |
52 | QEMUBH *bh; | |
53 | int ret; | |
54 | } BlockDriverAIOCBSync; | |
55 | ||
ce1a14dc PB |
56 | static BlockDriverAIOCB *bdrv_aio_read_em(BlockDriverState *bs, |
57 | int64_t sector_num, uint8_t *buf, int nb_sectors, | |
58 | BlockDriverCompletionFunc *cb, void *opaque); | |
59 | static BlockDriverAIOCB *bdrv_aio_write_em(BlockDriverState *bs, | |
60 | int64_t sector_num, const uint8_t *buf, int nb_sectors, | |
61 | BlockDriverCompletionFunc *cb, void *opaque); | |
83f64091 | 62 | static void bdrv_aio_cancel_em(BlockDriverAIOCB *acb); |
5fafdf24 | 63 | static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
83f64091 FB |
64 | uint8_t *buf, int nb_sectors); |
65 | static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, | |
66 | const uint8_t *buf, int nb_sectors); | |
ec530c81 | 67 | |
7ee930d0 BS |
68 | BlockDriverState *bdrv_first; |
69 | ||
ea2384d3 FB |
70 | static BlockDriver *first_drv; |
71 | ||
83f64091 | 72 | int path_is_absolute(const char *path) |
3b0d4f61 | 73 | { |
83f64091 | 74 | const char *p; |
21664424 FB |
75 | #ifdef _WIN32 |
76 | /* specific case for names like: "\\.\d:" */ | |
77 | if (*path == '/' || *path == '\\') | |
78 | return 1; | |
79 | #endif | |
83f64091 FB |
80 | p = strchr(path, ':'); |
81 | if (p) | |
82 | p++; | |
83 | else | |
84 | p = path; | |
3b9f94e1 FB |
85 | #ifdef _WIN32 |
86 | return (*p == '/' || *p == '\\'); | |
87 | #else | |
88 | return (*p == '/'); | |
89 | #endif | |
3b0d4f61 FB |
90 | } |
91 | ||
83f64091 FB |
92 | /* if filename is absolute, just copy it to dest. Otherwise, build a |
93 | path to it by considering it is relative to base_path. URL are | |
94 | supported. */ | |
95 | void path_combine(char *dest, int dest_size, | |
96 | const char *base_path, | |
97 | const char *filename) | |
3b0d4f61 | 98 | { |
83f64091 FB |
99 | const char *p, *p1; |
100 | int len; | |
101 | ||
102 | if (dest_size <= 0) | |
103 | return; | |
104 | if (path_is_absolute(filename)) { | |
105 | pstrcpy(dest, dest_size, filename); | |
106 | } else { | |
107 | p = strchr(base_path, ':'); | |
108 | if (p) | |
109 | p++; | |
110 | else | |
111 | p = base_path; | |
3b9f94e1 FB |
112 | p1 = strrchr(base_path, '/'); |
113 | #ifdef _WIN32 | |
114 | { | |
115 | const char *p2; | |
116 | p2 = strrchr(base_path, '\\'); | |
117 | if (!p1 || p2 > p1) | |
118 | p1 = p2; | |
119 | } | |
120 | #endif | |
83f64091 FB |
121 | if (p1) |
122 | p1++; | |
123 | else | |
124 | p1 = base_path; | |
125 | if (p1 > p) | |
126 | p = p1; | |
127 | len = p - base_path; | |
128 | if (len > dest_size - 1) | |
129 | len = dest_size - 1; | |
130 | memcpy(dest, base_path, len); | |
131 | dest[len] = '\0'; | |
132 | pstrcat(dest, dest_size, filename); | |
3b0d4f61 | 133 | } |
3b0d4f61 FB |
134 | } |
135 | ||
3b0d4f61 | 136 | |
9596ebb7 | 137 | static void bdrv_register(BlockDriver *bdrv) |
ea2384d3 | 138 | { |
ce1a14dc | 139 | if (!bdrv->bdrv_aio_read) { |
83f64091 | 140 | /* add AIO emulation layer */ |
83f64091 FB |
141 | bdrv->bdrv_aio_read = bdrv_aio_read_em; |
142 | bdrv->bdrv_aio_write = bdrv_aio_write_em; | |
143 | bdrv->bdrv_aio_cancel = bdrv_aio_cancel_em; | |
90765429 | 144 | bdrv->aiocb_size = sizeof(BlockDriverAIOCBSync); |
eda578e5 | 145 | } else if (!bdrv->bdrv_read) { |
83f64091 FB |
146 | /* add synchronous IO emulation layer */ |
147 | bdrv->bdrv_read = bdrv_read_em; | |
148 | bdrv->bdrv_write = bdrv_write_em; | |
149 | } | |
ea2384d3 FB |
150 | bdrv->next = first_drv; |
151 | first_drv = bdrv; | |
152 | } | |
b338082b FB |
153 | |
154 | /* create a new block device (by default it is empty) */ | |
155 | BlockDriverState *bdrv_new(const char *device_name) | |
156 | { | |
157 | BlockDriverState **pbs, *bs; | |
158 | ||
159 | bs = qemu_mallocz(sizeof(BlockDriverState)); | |
b338082b | 160 | pstrcpy(bs->device_name, sizeof(bs->device_name), device_name); |
ea2384d3 FB |
161 | if (device_name[0] != '\0') { |
162 | /* insert at the end */ | |
163 | pbs = &bdrv_first; | |
164 | while (*pbs != NULL) | |
165 | pbs = &(*pbs)->next; | |
166 | *pbs = bs; | |
167 | } | |
b338082b FB |
168 | return bs; |
169 | } | |
170 | ||
ea2384d3 FB |
171 | BlockDriver *bdrv_find_format(const char *format_name) |
172 | { | |
173 | BlockDriver *drv1; | |
174 | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { | |
175 | if (!strcmp(drv1->format_name, format_name)) | |
176 | return drv1; | |
177 | } | |
178 | return NULL; | |
179 | } | |
180 | ||
5fafdf24 | 181 | int bdrv_create(BlockDriver *drv, |
ea2384d3 FB |
182 | const char *filename, int64_t size_in_sectors, |
183 | const char *backing_file, int flags) | |
184 | { | |
185 | if (!drv->bdrv_create) | |
186 | return -ENOTSUP; | |
187 | return drv->bdrv_create(filename, size_in_sectors, backing_file, flags); | |
188 | } | |
189 | ||
d5249393 | 190 | #ifdef _WIN32 |
95389c86 | 191 | void get_tmp_filename(char *filename, int size) |
d5249393 | 192 | { |
3b9f94e1 | 193 | char temp_dir[MAX_PATH]; |
3b46e624 | 194 | |
3b9f94e1 FB |
195 | GetTempPath(MAX_PATH, temp_dir); |
196 | GetTempFileName(temp_dir, "qem", 0, filename); | |
d5249393 FB |
197 | } |
198 | #else | |
95389c86 | 199 | void get_tmp_filename(char *filename, int size) |
fc01f7e7 | 200 | { |
67b915a5 | 201 | int fd; |
7ccfb2eb | 202 | const char *tmpdir; |
d5249393 | 203 | /* XXX: race condition possible */ |
0badc1ee AJ |
204 | tmpdir = getenv("TMPDIR"); |
205 | if (!tmpdir) | |
206 | tmpdir = "/tmp"; | |
207 | snprintf(filename, size, "%s/vl.XXXXXX", tmpdir); | |
ea2384d3 FB |
208 | fd = mkstemp(filename); |
209 | close(fd); | |
210 | } | |
d5249393 | 211 | #endif |
fc01f7e7 | 212 | |
19cb3738 | 213 | #ifdef _WIN32 |
f45512fe FB |
214 | static int is_windows_drive_prefix(const char *filename) |
215 | { | |
216 | return (((filename[0] >= 'a' && filename[0] <= 'z') || | |
217 | (filename[0] >= 'A' && filename[0] <= 'Z')) && | |
218 | filename[1] == ':'); | |
219 | } | |
3b46e624 | 220 | |
19cb3738 FB |
221 | static int is_windows_drive(const char *filename) |
222 | { | |
5fafdf24 | 223 | if (is_windows_drive_prefix(filename) && |
f45512fe | 224 | filename[2] == '\0') |
19cb3738 FB |
225 | return 1; |
226 | if (strstart(filename, "\\\\.\\", NULL) || | |
227 | strstart(filename, "//./", NULL)) | |
228 | return 1; | |
229 | return 0; | |
230 | } | |
231 | #endif | |
232 | ||
83f64091 FB |
233 | static BlockDriver *find_protocol(const char *filename) |
234 | { | |
235 | BlockDriver *drv1; | |
236 | char protocol[128]; | |
237 | int len; | |
238 | const char *p; | |
19cb3738 FB |
239 | |
240 | #ifdef _WIN32 | |
f45512fe FB |
241 | if (is_windows_drive(filename) || |
242 | is_windows_drive_prefix(filename)) | |
19cb3738 FB |
243 | return &bdrv_raw; |
244 | #endif | |
83f64091 FB |
245 | p = strchr(filename, ':'); |
246 | if (!p) | |
247 | return &bdrv_raw; | |
248 | len = p - filename; | |
249 | if (len > sizeof(protocol) - 1) | |
250 | len = sizeof(protocol) - 1; | |
83f64091 FB |
251 | memcpy(protocol, filename, len); |
252 | protocol[len] = '\0'; | |
253 | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { | |
5fafdf24 | 254 | if (drv1->protocol_name && |
83f64091 FB |
255 | !strcmp(drv1->protocol_name, protocol)) |
256 | return drv1; | |
257 | } | |
258 | return NULL; | |
259 | } | |
260 | ||
7674e7bf FB |
261 | /* XXX: force raw format if block or character device ? It would |
262 | simplify the BSD case */ | |
ea2384d3 FB |
263 | static BlockDriver *find_image_format(const char *filename) |
264 | { | |
83f64091 | 265 | int ret, score, score_max; |
ea2384d3 | 266 | BlockDriver *drv1, *drv; |
83f64091 FB |
267 | uint8_t buf[2048]; |
268 | BlockDriverState *bs; | |
3b46e624 | 269 | |
19cb3738 FB |
270 | /* detect host devices. By convention, /dev/cdrom[N] is always |
271 | recognized as a host CDROM */ | |
272 | if (strstart(filename, "/dev/cdrom", NULL)) | |
273 | return &bdrv_host_device; | |
274 | #ifdef _WIN32 | |
275 | if (is_windows_drive(filename)) | |
276 | return &bdrv_host_device; | |
277 | #else | |
278 | { | |
279 | struct stat st; | |
5fafdf24 | 280 | if (stat(filename, &st) >= 0 && |
19cb3738 FB |
281 | (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) { |
282 | return &bdrv_host_device; | |
283 | } | |
284 | } | |
285 | #endif | |
3b46e624 | 286 | |
83f64091 | 287 | drv = find_protocol(filename); |
19cb3738 | 288 | /* no need to test disk image formats for vvfat */ |
83f64091 FB |
289 | if (drv == &bdrv_vvfat) |
290 | return drv; | |
19cb3738 | 291 | |
83f64091 FB |
292 | ret = bdrv_file_open(&bs, filename, BDRV_O_RDONLY); |
293 | if (ret < 0) | |
294 | return NULL; | |
295 | ret = bdrv_pread(bs, 0, buf, sizeof(buf)); | |
296 | bdrv_delete(bs); | |
297 | if (ret < 0) { | |
298 | return NULL; | |
299 | } | |
300 | ||
ea2384d3 FB |
301 | score_max = 0; |
302 | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { | |
83f64091 FB |
303 | if (drv1->bdrv_probe) { |
304 | score = drv1->bdrv_probe(buf, ret, filename); | |
305 | if (score > score_max) { | |
306 | score_max = score; | |
307 | drv = drv1; | |
308 | } | |
0849bf08 | 309 | } |
fc01f7e7 | 310 | } |
ea2384d3 FB |
311 | return drv; |
312 | } | |
313 | ||
83f64091 | 314 | int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags) |
ea2384d3 | 315 | { |
83f64091 FB |
316 | BlockDriverState *bs; |
317 | int ret; | |
318 | ||
319 | bs = bdrv_new(""); | |
83f64091 FB |
320 | ret = bdrv_open2(bs, filename, flags | BDRV_O_FILE, NULL); |
321 | if (ret < 0) { | |
322 | bdrv_delete(bs); | |
323 | return ret; | |
3b0d4f61 | 324 | } |
71d0770c | 325 | bs->growable = 1; |
83f64091 FB |
326 | *pbs = bs; |
327 | return 0; | |
328 | } | |
329 | ||
330 | int bdrv_open(BlockDriverState *bs, const char *filename, int flags) | |
331 | { | |
332 | return bdrv_open2(bs, filename, flags, NULL); | |
ea2384d3 FB |
333 | } |
334 | ||
83f64091 | 335 | int bdrv_open2(BlockDriverState *bs, const char *filename, int flags, |
ea2384d3 FB |
336 | BlockDriver *drv) |
337 | { | |
83f64091 | 338 | int ret, open_flags; |
eb5c851f TS |
339 | char tmp_filename[PATH_MAX]; |
340 | char backing_filename[PATH_MAX]; | |
3b46e624 | 341 | |
ea2384d3 FB |
342 | bs->read_only = 0; |
343 | bs->is_temporary = 0; | |
344 | bs->encrypted = 0; | |
c0f4ce77 | 345 | bs->valid_key = 0; |
712e7874 | 346 | |
83f64091 | 347 | if (flags & BDRV_O_SNAPSHOT) { |
ea2384d3 FB |
348 | BlockDriverState *bs1; |
349 | int64_t total_size; | |
7c96d46e | 350 | int is_protocol = 0; |
3b46e624 | 351 | |
ea2384d3 FB |
352 | /* if snapshot, we create a temporary backing file and open it |
353 | instead of opening 'filename' directly */ | |
33e3963e | 354 | |
ea2384d3 FB |
355 | /* if there is a backing file, use it */ |
356 | bs1 = bdrv_new(""); | |
51d7c00c AL |
357 | ret = bdrv_open(bs1, filename, 0); |
358 | if (ret < 0) { | |
ea2384d3 | 359 | bdrv_delete(bs1); |
51d7c00c | 360 | return ret; |
ea2384d3 | 361 | } |
83f64091 | 362 | total_size = bdrv_getlength(bs1) >> SECTOR_BITS; |
7c96d46e AL |
363 | |
364 | if (bs1->drv && bs1->drv->protocol_name) | |
365 | is_protocol = 1; | |
366 | ||
ea2384d3 | 367 | bdrv_delete(bs1); |
3b46e624 | 368 | |
ea2384d3 | 369 | get_tmp_filename(tmp_filename, sizeof(tmp_filename)); |
7c96d46e AL |
370 | |
371 | /* Real path is meaningless for protocols */ | |
372 | if (is_protocol) | |
373 | snprintf(backing_filename, sizeof(backing_filename), | |
374 | "%s", filename); | |
375 | else | |
376 | realpath(filename, backing_filename); | |
377 | ||
51d7c00c AL |
378 | ret = bdrv_create(&bdrv_qcow2, tmp_filename, |
379 | total_size, backing_filename, 0); | |
380 | if (ret < 0) { | |
381 | return ret; | |
ea2384d3 FB |
382 | } |
383 | filename = tmp_filename; | |
384 | bs->is_temporary = 1; | |
385 | } | |
712e7874 | 386 | |
ea2384d3 | 387 | pstrcpy(bs->filename, sizeof(bs->filename), filename); |
83f64091 FB |
388 | if (flags & BDRV_O_FILE) { |
389 | drv = find_protocol(filename); | |
51d7c00c AL |
390 | } else if (!drv) { |
391 | drv = find_image_format(filename); | |
392 | } | |
393 | if (!drv) { | |
394 | ret = -ENOENT; | |
395 | goto unlink_and_fail; | |
ea2384d3 FB |
396 | } |
397 | bs->drv = drv; | |
398 | bs->opaque = qemu_mallocz(drv->instance_size); | |
83f64091 FB |
399 | /* Note: for compatibility, we open disk image files as RDWR, and |
400 | RDONLY as fallback */ | |
401 | if (!(flags & BDRV_O_FILE)) | |
9f7965c7 | 402 | open_flags = BDRV_O_RDWR | (flags & BDRV_O_CACHE_MASK); |
83f64091 FB |
403 | else |
404 | open_flags = flags & ~(BDRV_O_FILE | BDRV_O_SNAPSHOT); | |
405 | ret = drv->bdrv_open(bs, filename, open_flags); | |
a0a83536 | 406 | if ((ret == -EACCES || ret == -EPERM) && !(flags & BDRV_O_FILE)) { |
9f7965c7 | 407 | ret = drv->bdrv_open(bs, filename, open_flags & ~BDRV_O_RDWR); |
83f64091 FB |
408 | bs->read_only = 1; |
409 | } | |
ea2384d3 FB |
410 | if (ret < 0) { |
411 | qemu_free(bs->opaque); | |
6b21b973 FB |
412 | bs->opaque = NULL; |
413 | bs->drv = NULL; | |
51d7c00c AL |
414 | unlink_and_fail: |
415 | if (bs->is_temporary) | |
416 | unlink(filename); | |
83f64091 | 417 | return ret; |
33e3963e | 418 | } |
d15a771d FB |
419 | if (drv->bdrv_getlength) { |
420 | bs->total_sectors = bdrv_getlength(bs) >> SECTOR_BITS; | |
421 | } | |
67b915a5 | 422 | #ifndef _WIN32 |
ea2384d3 FB |
423 | if (bs->is_temporary) { |
424 | unlink(filename); | |
425 | } | |
426 | #endif | |
83f64091 | 427 | if (bs->backing_file[0] != '\0') { |
ea2384d3 FB |
428 | /* if there is a backing file, use it */ |
429 | bs->backing_hd = bdrv_new(""); | |
83f64091 FB |
430 | path_combine(backing_filename, sizeof(backing_filename), |
431 | filename, bs->backing_file); | |
51d7c00c AL |
432 | ret = bdrv_open(bs->backing_hd, backing_filename, open_flags); |
433 | if (ret < 0) { | |
434 | bdrv_close(bs); | |
435 | return ret; | |
436 | } | |
33e3963e FB |
437 | } |
438 | ||
bb5fc20f AL |
439 | if (!bdrv_key_required(bs)) { |
440 | /* call the change callback */ | |
441 | bs->media_changed = 1; | |
442 | if (bs->change_cb) | |
443 | bs->change_cb(bs->change_opaque); | |
444 | } | |
b338082b | 445 | return 0; |
fc01f7e7 FB |
446 | } |
447 | ||
448 | void bdrv_close(BlockDriverState *bs) | |
449 | { | |
19cb3738 | 450 | if (bs->drv) { |
ea2384d3 FB |
451 | if (bs->backing_hd) |
452 | bdrv_delete(bs->backing_hd); | |
453 | bs->drv->bdrv_close(bs); | |
454 | qemu_free(bs->opaque); | |
455 | #ifdef _WIN32 | |
456 | if (bs->is_temporary) { | |
457 | unlink(bs->filename); | |
458 | } | |
67b915a5 | 459 | #endif |
ea2384d3 FB |
460 | bs->opaque = NULL; |
461 | bs->drv = NULL; | |
b338082b FB |
462 | |
463 | /* call the change callback */ | |
19cb3738 | 464 | bs->media_changed = 1; |
b338082b FB |
465 | if (bs->change_cb) |
466 | bs->change_cb(bs->change_opaque); | |
467 | } | |
468 | } | |
469 | ||
470 | void bdrv_delete(BlockDriverState *bs) | |
471 | { | |
34c6f050 AJ |
472 | BlockDriverState **pbs; |
473 | ||
474 | pbs = &bdrv_first; | |
475 | while (*pbs != bs && *pbs != NULL) | |
476 | pbs = &(*pbs)->next; | |
477 | if (*pbs == bs) | |
478 | *pbs = bs->next; | |
479 | ||
b338082b FB |
480 | bdrv_close(bs); |
481 | qemu_free(bs); | |
fc01f7e7 FB |
482 | } |
483 | ||
33e3963e FB |
484 | /* commit COW file into the raw image */ |
485 | int bdrv_commit(BlockDriverState *bs) | |
486 | { | |
19cb3738 | 487 | BlockDriver *drv = bs->drv; |
83f64091 | 488 | int64_t i, total_sectors; |
ea2384d3 FB |
489 | int n, j; |
490 | unsigned char sector[512]; | |
33e3963e | 491 | |
19cb3738 FB |
492 | if (!drv) |
493 | return -ENOMEDIUM; | |
33e3963e FB |
494 | |
495 | if (bs->read_only) { | |
ea2384d3 | 496 | return -EACCES; |
33e3963e FB |
497 | } |
498 | ||
ea2384d3 FB |
499 | if (!bs->backing_hd) { |
500 | return -ENOTSUP; | |
501 | } | |
33e3963e | 502 | |
83f64091 FB |
503 | total_sectors = bdrv_getlength(bs) >> SECTOR_BITS; |
504 | for (i = 0; i < total_sectors;) { | |
19cb3738 | 505 | if (drv->bdrv_is_allocated(bs, i, 65536, &n)) { |
ea2384d3 FB |
506 | for(j = 0; j < n; j++) { |
507 | if (bdrv_read(bs, i, sector, 1) != 0) { | |
508 | return -EIO; | |
509 | } | |
510 | ||
511 | if (bdrv_write(bs->backing_hd, i, sector, 1) != 0) { | |
512 | return -EIO; | |
513 | } | |
514 | i++; | |
33e3963e | 515 | } |
ea2384d3 FB |
516 | } else { |
517 | i += n; | |
518 | } | |
33e3963e | 519 | } |
95389c86 | 520 | |
19cb3738 FB |
521 | if (drv->bdrv_make_empty) |
522 | return drv->bdrv_make_empty(bs); | |
95389c86 | 523 | |
33e3963e FB |
524 | return 0; |
525 | } | |
526 | ||
71d0770c AL |
527 | static int bdrv_check_byte_request(BlockDriverState *bs, int64_t offset, |
528 | size_t size) | |
529 | { | |
530 | int64_t len; | |
531 | ||
532 | if (!bdrv_is_inserted(bs)) | |
533 | return -ENOMEDIUM; | |
534 | ||
535 | if (bs->growable) | |
536 | return 0; | |
537 | ||
538 | len = bdrv_getlength(bs); | |
539 | ||
540 | if ((offset + size) > len) | |
541 | return -EIO; | |
542 | ||
543 | return 0; | |
544 | } | |
545 | ||
546 | static int bdrv_check_request(BlockDriverState *bs, int64_t sector_num, | |
547 | int nb_sectors) | |
548 | { | |
549 | int64_t offset; | |
550 | ||
551 | /* Deal with byte accesses */ | |
552 | if (sector_num < 0) | |
553 | offset = -sector_num; | |
554 | else | |
555 | offset = sector_num * 512; | |
556 | ||
557 | return bdrv_check_byte_request(bs, offset, nb_sectors * 512); | |
558 | } | |
559 | ||
19cb3738 | 560 | /* return < 0 if error. See bdrv_write() for the return codes */ |
5fafdf24 | 561 | int bdrv_read(BlockDriverState *bs, int64_t sector_num, |
fc01f7e7 FB |
562 | uint8_t *buf, int nb_sectors) |
563 | { | |
ea2384d3 FB |
564 | BlockDriver *drv = bs->drv; |
565 | ||
19cb3738 FB |
566 | if (!drv) |
567 | return -ENOMEDIUM; | |
71d0770c AL |
568 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
569 | return -EIO; | |
b338082b | 570 | |
eda578e5 | 571 | return drv->bdrv_read(bs, sector_num, buf, nb_sectors); |
fc01f7e7 FB |
572 | } |
573 | ||
5fafdf24 | 574 | /* Return < 0 if error. Important errors are: |
19cb3738 FB |
575 | -EIO generic I/O error (may happen for all errors) |
576 | -ENOMEDIUM No media inserted. | |
577 | -EINVAL Invalid sector number or nb_sectors | |
578 | -EACCES Trying to write a read-only device | |
579 | */ | |
5fafdf24 | 580 | int bdrv_write(BlockDriverState *bs, int64_t sector_num, |
fc01f7e7 FB |
581 | const uint8_t *buf, int nb_sectors) |
582 | { | |
83f64091 | 583 | BlockDriver *drv = bs->drv; |
19cb3738 FB |
584 | if (!bs->drv) |
585 | return -ENOMEDIUM; | |
0849bf08 | 586 | if (bs->read_only) |
19cb3738 | 587 | return -EACCES; |
71d0770c AL |
588 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
589 | return -EIO; | |
590 | ||
42fb2807 | 591 | return drv->bdrv_write(bs, sector_num, buf, nb_sectors); |
83f64091 FB |
592 | } |
593 | ||
eda578e5 AL |
594 | int bdrv_pread(BlockDriverState *bs, int64_t offset, |
595 | void *buf, int count1) | |
83f64091 | 596 | { |
83f64091 FB |
597 | uint8_t tmp_buf[SECTOR_SIZE]; |
598 | int len, nb_sectors, count; | |
599 | int64_t sector_num; | |
600 | ||
601 | count = count1; | |
602 | /* first read to align to sector start */ | |
603 | len = (SECTOR_SIZE - offset) & (SECTOR_SIZE - 1); | |
604 | if (len > count) | |
605 | len = count; | |
606 | sector_num = offset >> SECTOR_BITS; | |
607 | if (len > 0) { | |
608 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) | |
609 | return -EIO; | |
610 | memcpy(buf, tmp_buf + (offset & (SECTOR_SIZE - 1)), len); | |
611 | count -= len; | |
612 | if (count == 0) | |
613 | return count1; | |
614 | sector_num++; | |
615 | buf += len; | |
616 | } | |
617 | ||
618 | /* read the sectors "in place" */ | |
619 | nb_sectors = count >> SECTOR_BITS; | |
620 | if (nb_sectors > 0) { | |
621 | if (bdrv_read(bs, sector_num, buf, nb_sectors) < 0) | |
622 | return -EIO; | |
623 | sector_num += nb_sectors; | |
624 | len = nb_sectors << SECTOR_BITS; | |
625 | buf += len; | |
626 | count -= len; | |
627 | } | |
628 | ||
629 | /* add data from the last sector */ | |
630 | if (count > 0) { | |
631 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) | |
632 | return -EIO; | |
633 | memcpy(buf, tmp_buf, count); | |
634 | } | |
635 | return count1; | |
636 | } | |
637 | ||
eda578e5 AL |
638 | int bdrv_pwrite(BlockDriverState *bs, int64_t offset, |
639 | const void *buf, int count1) | |
83f64091 | 640 | { |
83f64091 FB |
641 | uint8_t tmp_buf[SECTOR_SIZE]; |
642 | int len, nb_sectors, count; | |
643 | int64_t sector_num; | |
644 | ||
645 | count = count1; | |
646 | /* first write to align to sector start */ | |
647 | len = (SECTOR_SIZE - offset) & (SECTOR_SIZE - 1); | |
648 | if (len > count) | |
649 | len = count; | |
650 | sector_num = offset >> SECTOR_BITS; | |
651 | if (len > 0) { | |
652 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) | |
653 | return -EIO; | |
654 | memcpy(tmp_buf + (offset & (SECTOR_SIZE - 1)), buf, len); | |
655 | if (bdrv_write(bs, sector_num, tmp_buf, 1) < 0) | |
656 | return -EIO; | |
657 | count -= len; | |
658 | if (count == 0) | |
659 | return count1; | |
660 | sector_num++; | |
661 | buf += len; | |
662 | } | |
663 | ||
664 | /* write the sectors "in place" */ | |
665 | nb_sectors = count >> SECTOR_BITS; | |
666 | if (nb_sectors > 0) { | |
667 | if (bdrv_write(bs, sector_num, buf, nb_sectors) < 0) | |
668 | return -EIO; | |
669 | sector_num += nb_sectors; | |
670 | len = nb_sectors << SECTOR_BITS; | |
671 | buf += len; | |
672 | count -= len; | |
673 | } | |
674 | ||
675 | /* add data from the last sector */ | |
676 | if (count > 0) { | |
677 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) | |
678 | return -EIO; | |
679 | memcpy(tmp_buf, buf, count); | |
680 | if (bdrv_write(bs, sector_num, tmp_buf, 1) < 0) | |
681 | return -EIO; | |
682 | } | |
683 | return count1; | |
684 | } | |
83f64091 | 685 | |
83f64091 FB |
686 | /** |
687 | * Truncate file to 'offset' bytes (needed only for file protocols) | |
688 | */ | |
689 | int bdrv_truncate(BlockDriverState *bs, int64_t offset) | |
690 | { | |
691 | BlockDriver *drv = bs->drv; | |
692 | if (!drv) | |
19cb3738 | 693 | return -ENOMEDIUM; |
83f64091 FB |
694 | if (!drv->bdrv_truncate) |
695 | return -ENOTSUP; | |
696 | return drv->bdrv_truncate(bs, offset); | |
697 | } | |
698 | ||
699 | /** | |
700 | * Length of a file in bytes. Return < 0 if error or unknown. | |
701 | */ | |
702 | int64_t bdrv_getlength(BlockDriverState *bs) | |
703 | { | |
704 | BlockDriver *drv = bs->drv; | |
705 | if (!drv) | |
19cb3738 | 706 | return -ENOMEDIUM; |
83f64091 FB |
707 | if (!drv->bdrv_getlength) { |
708 | /* legacy mode */ | |
709 | return bs->total_sectors * SECTOR_SIZE; | |
710 | } | |
711 | return drv->bdrv_getlength(bs); | |
fc01f7e7 FB |
712 | } |
713 | ||
19cb3738 | 714 | /* return 0 as number of sectors if no device present or error */ |
96b8f136 | 715 | void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr) |
fc01f7e7 | 716 | { |
19cb3738 FB |
717 | int64_t length; |
718 | length = bdrv_getlength(bs); | |
719 | if (length < 0) | |
720 | length = 0; | |
721 | else | |
722 | length = length >> SECTOR_BITS; | |
723 | *nb_sectors_ptr = length; | |
fc01f7e7 | 724 | } |
cf98951b | 725 | |
f3d54fc4 AL |
726 | struct partition { |
727 | uint8_t boot_ind; /* 0x80 - active */ | |
728 | uint8_t head; /* starting head */ | |
729 | uint8_t sector; /* starting sector */ | |
730 | uint8_t cyl; /* starting cylinder */ | |
731 | uint8_t sys_ind; /* What partition type */ | |
732 | uint8_t end_head; /* end head */ | |
733 | uint8_t end_sector; /* end sector */ | |
734 | uint8_t end_cyl; /* end cylinder */ | |
735 | uint32_t start_sect; /* starting sector counting from 0 */ | |
736 | uint32_t nr_sects; /* nr of sectors in partition */ | |
737 | } __attribute__((packed)); | |
738 | ||
739 | /* try to guess the disk logical geometry from the MSDOS partition table. Return 0 if OK, -1 if could not guess */ | |
740 | static int guess_disk_lchs(BlockDriverState *bs, | |
741 | int *pcylinders, int *pheads, int *psectors) | |
742 | { | |
743 | uint8_t buf[512]; | |
744 | int ret, i, heads, sectors, cylinders; | |
745 | struct partition *p; | |
746 | uint32_t nr_sects; | |
a38131b6 | 747 | uint64_t nb_sectors; |
f3d54fc4 AL |
748 | |
749 | bdrv_get_geometry(bs, &nb_sectors); | |
750 | ||
751 | ret = bdrv_read(bs, 0, buf, 1); | |
752 | if (ret < 0) | |
753 | return -1; | |
754 | /* test msdos magic */ | |
755 | if (buf[510] != 0x55 || buf[511] != 0xaa) | |
756 | return -1; | |
757 | for(i = 0; i < 4; i++) { | |
758 | p = ((struct partition *)(buf + 0x1be)) + i; | |
759 | nr_sects = le32_to_cpu(p->nr_sects); | |
760 | if (nr_sects && p->end_head) { | |
761 | /* We make the assumption that the partition terminates on | |
762 | a cylinder boundary */ | |
763 | heads = p->end_head + 1; | |
764 | sectors = p->end_sector & 63; | |
765 | if (sectors == 0) | |
766 | continue; | |
767 | cylinders = nb_sectors / (heads * sectors); | |
768 | if (cylinders < 1 || cylinders > 16383) | |
769 | continue; | |
770 | *pheads = heads; | |
771 | *psectors = sectors; | |
772 | *pcylinders = cylinders; | |
773 | #if 0 | |
774 | printf("guessed geometry: LCHS=%d %d %d\n", | |
775 | cylinders, heads, sectors); | |
776 | #endif | |
777 | return 0; | |
778 | } | |
779 | } | |
780 | return -1; | |
781 | } | |
782 | ||
783 | void bdrv_guess_geometry(BlockDriverState *bs, int *pcyls, int *pheads, int *psecs) | |
784 | { | |
785 | int translation, lba_detected = 0; | |
786 | int cylinders, heads, secs; | |
a38131b6 | 787 | uint64_t nb_sectors; |
f3d54fc4 AL |
788 | |
789 | /* if a geometry hint is available, use it */ | |
790 | bdrv_get_geometry(bs, &nb_sectors); | |
791 | bdrv_get_geometry_hint(bs, &cylinders, &heads, &secs); | |
792 | translation = bdrv_get_translation_hint(bs); | |
793 | if (cylinders != 0) { | |
794 | *pcyls = cylinders; | |
795 | *pheads = heads; | |
796 | *psecs = secs; | |
797 | } else { | |
798 | if (guess_disk_lchs(bs, &cylinders, &heads, &secs) == 0) { | |
799 | if (heads > 16) { | |
800 | /* if heads > 16, it means that a BIOS LBA | |
801 | translation was active, so the default | |
802 | hardware geometry is OK */ | |
803 | lba_detected = 1; | |
804 | goto default_geometry; | |
805 | } else { | |
806 | *pcyls = cylinders; | |
807 | *pheads = heads; | |
808 | *psecs = secs; | |
809 | /* disable any translation to be in sync with | |
810 | the logical geometry */ | |
811 | if (translation == BIOS_ATA_TRANSLATION_AUTO) { | |
812 | bdrv_set_translation_hint(bs, | |
813 | BIOS_ATA_TRANSLATION_NONE); | |
814 | } | |
815 | } | |
816 | } else { | |
817 | default_geometry: | |
818 | /* if no geometry, use a standard physical disk geometry */ | |
819 | cylinders = nb_sectors / (16 * 63); | |
820 | ||
821 | if (cylinders > 16383) | |
822 | cylinders = 16383; | |
823 | else if (cylinders < 2) | |
824 | cylinders = 2; | |
825 | *pcyls = cylinders; | |
826 | *pheads = 16; | |
827 | *psecs = 63; | |
828 | if ((lba_detected == 1) && (translation == BIOS_ATA_TRANSLATION_AUTO)) { | |
829 | if ((*pcyls * *pheads) <= 131072) { | |
830 | bdrv_set_translation_hint(bs, | |
831 | BIOS_ATA_TRANSLATION_LARGE); | |
832 | } else { | |
833 | bdrv_set_translation_hint(bs, | |
834 | BIOS_ATA_TRANSLATION_LBA); | |
835 | } | |
836 | } | |
837 | } | |
838 | bdrv_set_geometry_hint(bs, *pcyls, *pheads, *psecs); | |
839 | } | |
840 | } | |
841 | ||
5fafdf24 | 842 | void bdrv_set_geometry_hint(BlockDriverState *bs, |
b338082b FB |
843 | int cyls, int heads, int secs) |
844 | { | |
845 | bs->cyls = cyls; | |
846 | bs->heads = heads; | |
847 | bs->secs = secs; | |
848 | } | |
849 | ||
850 | void bdrv_set_type_hint(BlockDriverState *bs, int type) | |
851 | { | |
852 | bs->type = type; | |
853 | bs->removable = ((type == BDRV_TYPE_CDROM || | |
854 | type == BDRV_TYPE_FLOPPY)); | |
855 | } | |
856 | ||
46d4767d FB |
857 | void bdrv_set_translation_hint(BlockDriverState *bs, int translation) |
858 | { | |
859 | bs->translation = translation; | |
860 | } | |
861 | ||
5fafdf24 | 862 | void bdrv_get_geometry_hint(BlockDriverState *bs, |
b338082b FB |
863 | int *pcyls, int *pheads, int *psecs) |
864 | { | |
865 | *pcyls = bs->cyls; | |
866 | *pheads = bs->heads; | |
867 | *psecs = bs->secs; | |
868 | } | |
869 | ||
870 | int bdrv_get_type_hint(BlockDriverState *bs) | |
871 | { | |
872 | return bs->type; | |
873 | } | |
874 | ||
46d4767d FB |
875 | int bdrv_get_translation_hint(BlockDriverState *bs) |
876 | { | |
877 | return bs->translation; | |
878 | } | |
879 | ||
b338082b FB |
880 | int bdrv_is_removable(BlockDriverState *bs) |
881 | { | |
882 | return bs->removable; | |
883 | } | |
884 | ||
885 | int bdrv_is_read_only(BlockDriverState *bs) | |
886 | { | |
887 | return bs->read_only; | |
888 | } | |
889 | ||
985a03b0 TS |
890 | int bdrv_is_sg(BlockDriverState *bs) |
891 | { | |
892 | return bs->sg; | |
893 | } | |
894 | ||
19cb3738 | 895 | /* XXX: no longer used */ |
5fafdf24 | 896 | void bdrv_set_change_cb(BlockDriverState *bs, |
b338082b FB |
897 | void (*change_cb)(void *opaque), void *opaque) |
898 | { | |
899 | bs->change_cb = change_cb; | |
900 | bs->change_opaque = opaque; | |
901 | } | |
902 | ||
ea2384d3 FB |
903 | int bdrv_is_encrypted(BlockDriverState *bs) |
904 | { | |
905 | if (bs->backing_hd && bs->backing_hd->encrypted) | |
906 | return 1; | |
907 | return bs->encrypted; | |
908 | } | |
909 | ||
c0f4ce77 AL |
910 | int bdrv_key_required(BlockDriverState *bs) |
911 | { | |
912 | BlockDriverState *backing_hd = bs->backing_hd; | |
913 | ||
914 | if (backing_hd && backing_hd->encrypted && !backing_hd->valid_key) | |
915 | return 1; | |
916 | return (bs->encrypted && !bs->valid_key); | |
917 | } | |
918 | ||
ea2384d3 FB |
919 | int bdrv_set_key(BlockDriverState *bs, const char *key) |
920 | { | |
921 | int ret; | |
922 | if (bs->backing_hd && bs->backing_hd->encrypted) { | |
923 | ret = bdrv_set_key(bs->backing_hd, key); | |
924 | if (ret < 0) | |
925 | return ret; | |
926 | if (!bs->encrypted) | |
927 | return 0; | |
928 | } | |
929 | if (!bs->encrypted || !bs->drv || !bs->drv->bdrv_set_key) | |
930 | return -1; | |
c0f4ce77 | 931 | ret = bs->drv->bdrv_set_key(bs, key); |
bb5fc20f AL |
932 | if (ret < 0) { |
933 | bs->valid_key = 0; | |
934 | } else if (!bs->valid_key) { | |
935 | bs->valid_key = 1; | |
936 | /* call the change callback now, we skipped it on open */ | |
937 | bs->media_changed = 1; | |
938 | if (bs->change_cb) | |
939 | bs->change_cb(bs->change_opaque); | |
940 | } | |
c0f4ce77 | 941 | return ret; |
ea2384d3 FB |
942 | } |
943 | ||
944 | void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size) | |
945 | { | |
19cb3738 | 946 | if (!bs->drv) { |
ea2384d3 FB |
947 | buf[0] = '\0'; |
948 | } else { | |
949 | pstrcpy(buf, buf_size, bs->drv->format_name); | |
950 | } | |
951 | } | |
952 | ||
5fafdf24 | 953 | void bdrv_iterate_format(void (*it)(void *opaque, const char *name), |
ea2384d3 FB |
954 | void *opaque) |
955 | { | |
956 | BlockDriver *drv; | |
957 | ||
958 | for (drv = first_drv; drv != NULL; drv = drv->next) { | |
959 | it(opaque, drv->format_name); | |
960 | } | |
961 | } | |
962 | ||
b338082b FB |
963 | BlockDriverState *bdrv_find(const char *name) |
964 | { | |
965 | BlockDriverState *bs; | |
966 | ||
967 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { | |
968 | if (!strcmp(name, bs->device_name)) | |
969 | return bs; | |
970 | } | |
971 | return NULL; | |
972 | } | |
973 | ||
51de9760 | 974 | void bdrv_iterate(void (*it)(void *opaque, BlockDriverState *bs), void *opaque) |
81d0912d FB |
975 | { |
976 | BlockDriverState *bs; | |
977 | ||
978 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { | |
51de9760 | 979 | it(opaque, bs); |
81d0912d FB |
980 | } |
981 | } | |
982 | ||
ea2384d3 FB |
983 | const char *bdrv_get_device_name(BlockDriverState *bs) |
984 | { | |
985 | return bs->device_name; | |
986 | } | |
987 | ||
7a6cba61 PB |
988 | void bdrv_flush(BlockDriverState *bs) |
989 | { | |
990 | if (bs->drv->bdrv_flush) | |
991 | bs->drv->bdrv_flush(bs); | |
992 | if (bs->backing_hd) | |
993 | bdrv_flush(bs->backing_hd); | |
994 | } | |
995 | ||
c6ca28d6 AL |
996 | void bdrv_flush_all(void) |
997 | { | |
998 | BlockDriverState *bs; | |
999 | ||
1000 | for (bs = bdrv_first; bs != NULL; bs = bs->next) | |
1001 | if (bs->drv && !bdrv_is_read_only(bs) && | |
1002 | (!bdrv_is_removable(bs) || bdrv_is_inserted(bs))) | |
1003 | bdrv_flush(bs); | |
1004 | } | |
1005 | ||
f58c7b35 TS |
1006 | /* |
1007 | * Returns true iff the specified sector is present in the disk image. Drivers | |
1008 | * not implementing the functionality are assumed to not support backing files, | |
1009 | * hence all their sectors are reported as allocated. | |
1010 | * | |
1011 | * 'pnum' is set to the number of sectors (including and immediately following | |
1012 | * the specified sector) that are known to be in the same | |
1013 | * allocated/unallocated state. | |
1014 | * | |
1015 | * 'nb_sectors' is the max value 'pnum' should be set to. | |
1016 | */ | |
1017 | int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, | |
1018 | int *pnum) | |
1019 | { | |
1020 | int64_t n; | |
1021 | if (!bs->drv->bdrv_is_allocated) { | |
1022 | if (sector_num >= bs->total_sectors) { | |
1023 | *pnum = 0; | |
1024 | return 0; | |
1025 | } | |
1026 | n = bs->total_sectors - sector_num; | |
1027 | *pnum = (n < nb_sectors) ? (n) : (nb_sectors); | |
1028 | return 1; | |
1029 | } | |
1030 | return bs->drv->bdrv_is_allocated(bs, sector_num, nb_sectors, pnum); | |
1031 | } | |
1032 | ||
376253ec | 1033 | void bdrv_info(Monitor *mon) |
b338082b FB |
1034 | { |
1035 | BlockDriverState *bs; | |
1036 | ||
1037 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { | |
376253ec AL |
1038 | monitor_printf(mon, "%s:", bs->device_name); |
1039 | monitor_printf(mon, " type="); | |
b338082b FB |
1040 | switch(bs->type) { |
1041 | case BDRV_TYPE_HD: | |
376253ec | 1042 | monitor_printf(mon, "hd"); |
b338082b FB |
1043 | break; |
1044 | case BDRV_TYPE_CDROM: | |
376253ec | 1045 | monitor_printf(mon, "cdrom"); |
b338082b FB |
1046 | break; |
1047 | case BDRV_TYPE_FLOPPY: | |
376253ec | 1048 | monitor_printf(mon, "floppy"); |
b338082b FB |
1049 | break; |
1050 | } | |
376253ec | 1051 | monitor_printf(mon, " removable=%d", bs->removable); |
b338082b | 1052 | if (bs->removable) { |
376253ec | 1053 | monitor_printf(mon, " locked=%d", bs->locked); |
b338082b | 1054 | } |
19cb3738 | 1055 | if (bs->drv) { |
376253ec AL |
1056 | monitor_printf(mon, " file="); |
1057 | monitor_print_filename(mon, bs->filename); | |
fef30743 | 1058 | if (bs->backing_file[0] != '\0') { |
376253ec AL |
1059 | monitor_printf(mon, " backing_file="); |
1060 | monitor_print_filename(mon, bs->backing_file); | |
1061 | } | |
1062 | monitor_printf(mon, " ro=%d", bs->read_only); | |
1063 | monitor_printf(mon, " drv=%s", bs->drv->format_name); | |
1064 | monitor_printf(mon, " encrypted=%d", bdrv_is_encrypted(bs)); | |
b338082b | 1065 | } else { |
376253ec | 1066 | monitor_printf(mon, " [not inserted]"); |
b338082b | 1067 | } |
376253ec | 1068 | monitor_printf(mon, "\n"); |
b338082b FB |
1069 | } |
1070 | } | |
a36e69dd TS |
1071 | |
1072 | /* The "info blockstats" command. */ | |
376253ec | 1073 | void bdrv_info_stats(Monitor *mon) |
a36e69dd TS |
1074 | { |
1075 | BlockDriverState *bs; | |
1076 | ||
1077 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { | |
376253ec AL |
1078 | monitor_printf(mon, "%s:" |
1079 | " rd_bytes=%" PRIu64 | |
1080 | " wr_bytes=%" PRIu64 | |
1081 | " rd_operations=%" PRIu64 | |
1082 | " wr_operations=%" PRIu64 | |
ebf53fcd | 1083 | "\n", |
376253ec AL |
1084 | bs->device_name, |
1085 | bs->rd_bytes, bs->wr_bytes, | |
1086 | bs->rd_ops, bs->wr_ops); | |
a36e69dd TS |
1087 | } |
1088 | } | |
ea2384d3 | 1089 | |
045df330 AL |
1090 | const char *bdrv_get_encrypted_filename(BlockDriverState *bs) |
1091 | { | |
1092 | if (bs->backing_hd && bs->backing_hd->encrypted) | |
1093 | return bs->backing_file; | |
1094 | else if (bs->encrypted) | |
1095 | return bs->filename; | |
1096 | else | |
1097 | return NULL; | |
1098 | } | |
1099 | ||
5fafdf24 | 1100 | void bdrv_get_backing_filename(BlockDriverState *bs, |
83f64091 FB |
1101 | char *filename, int filename_size) |
1102 | { | |
1103 | if (!bs->backing_hd) { | |
1104 | pstrcpy(filename, filename_size, ""); | |
1105 | } else { | |
1106 | pstrcpy(filename, filename_size, bs->backing_file); | |
1107 | } | |
1108 | } | |
1109 | ||
5fafdf24 | 1110 | int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num, |
faea38e7 FB |
1111 | const uint8_t *buf, int nb_sectors) |
1112 | { | |
1113 | BlockDriver *drv = bs->drv; | |
1114 | if (!drv) | |
19cb3738 | 1115 | return -ENOMEDIUM; |
faea38e7 FB |
1116 | if (!drv->bdrv_write_compressed) |
1117 | return -ENOTSUP; | |
1118 | return drv->bdrv_write_compressed(bs, sector_num, buf, nb_sectors); | |
1119 | } | |
3b46e624 | 1120 | |
faea38e7 FB |
1121 | int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) |
1122 | { | |
1123 | BlockDriver *drv = bs->drv; | |
1124 | if (!drv) | |
19cb3738 | 1125 | return -ENOMEDIUM; |
faea38e7 FB |
1126 | if (!drv->bdrv_get_info) |
1127 | return -ENOTSUP; | |
1128 | memset(bdi, 0, sizeof(*bdi)); | |
1129 | return drv->bdrv_get_info(bs, bdi); | |
1130 | } | |
1131 | ||
1132 | /**************************************************************/ | |
1133 | /* handling of snapshots */ | |
1134 | ||
5fafdf24 | 1135 | int bdrv_snapshot_create(BlockDriverState *bs, |
faea38e7 FB |
1136 | QEMUSnapshotInfo *sn_info) |
1137 | { | |
1138 | BlockDriver *drv = bs->drv; | |
1139 | if (!drv) | |
19cb3738 | 1140 | return -ENOMEDIUM; |
faea38e7 FB |
1141 | if (!drv->bdrv_snapshot_create) |
1142 | return -ENOTSUP; | |
1143 | return drv->bdrv_snapshot_create(bs, sn_info); | |
1144 | } | |
1145 | ||
5fafdf24 | 1146 | int bdrv_snapshot_goto(BlockDriverState *bs, |
faea38e7 FB |
1147 | const char *snapshot_id) |
1148 | { | |
1149 | BlockDriver *drv = bs->drv; | |
1150 | if (!drv) | |
19cb3738 | 1151 | return -ENOMEDIUM; |
faea38e7 FB |
1152 | if (!drv->bdrv_snapshot_goto) |
1153 | return -ENOTSUP; | |
1154 | return drv->bdrv_snapshot_goto(bs, snapshot_id); | |
1155 | } | |
1156 | ||
1157 | int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id) | |
1158 | { | |
1159 | BlockDriver *drv = bs->drv; | |
1160 | if (!drv) | |
19cb3738 | 1161 | return -ENOMEDIUM; |
faea38e7 FB |
1162 | if (!drv->bdrv_snapshot_delete) |
1163 | return -ENOTSUP; | |
1164 | return drv->bdrv_snapshot_delete(bs, snapshot_id); | |
1165 | } | |
1166 | ||
5fafdf24 | 1167 | int bdrv_snapshot_list(BlockDriverState *bs, |
faea38e7 FB |
1168 | QEMUSnapshotInfo **psn_info) |
1169 | { | |
1170 | BlockDriver *drv = bs->drv; | |
1171 | if (!drv) | |
19cb3738 | 1172 | return -ENOMEDIUM; |
faea38e7 FB |
1173 | if (!drv->bdrv_snapshot_list) |
1174 | return -ENOTSUP; | |
1175 | return drv->bdrv_snapshot_list(bs, psn_info); | |
1176 | } | |
1177 | ||
1178 | #define NB_SUFFIXES 4 | |
1179 | ||
1180 | char *get_human_readable_size(char *buf, int buf_size, int64_t size) | |
1181 | { | |
1182 | static const char suffixes[NB_SUFFIXES] = "KMGT"; | |
1183 | int64_t base; | |
1184 | int i; | |
1185 | ||
1186 | if (size <= 999) { | |
1187 | snprintf(buf, buf_size, "%" PRId64, size); | |
1188 | } else { | |
1189 | base = 1024; | |
1190 | for(i = 0; i < NB_SUFFIXES; i++) { | |
1191 | if (size < (10 * base)) { | |
5fafdf24 | 1192 | snprintf(buf, buf_size, "%0.1f%c", |
faea38e7 FB |
1193 | (double)size / base, |
1194 | suffixes[i]); | |
1195 | break; | |
1196 | } else if (size < (1000 * base) || i == (NB_SUFFIXES - 1)) { | |
5fafdf24 | 1197 | snprintf(buf, buf_size, "%" PRId64 "%c", |
faea38e7 FB |
1198 | ((size + (base >> 1)) / base), |
1199 | suffixes[i]); | |
1200 | break; | |
1201 | } | |
1202 | base = base * 1024; | |
1203 | } | |
1204 | } | |
1205 | return buf; | |
1206 | } | |
1207 | ||
1208 | char *bdrv_snapshot_dump(char *buf, int buf_size, QEMUSnapshotInfo *sn) | |
1209 | { | |
1210 | char buf1[128], date_buf[128], clock_buf[128]; | |
3b9f94e1 FB |
1211 | #ifdef _WIN32 |
1212 | struct tm *ptm; | |
1213 | #else | |
faea38e7 | 1214 | struct tm tm; |
3b9f94e1 | 1215 | #endif |
faea38e7 FB |
1216 | time_t ti; |
1217 | int64_t secs; | |
1218 | ||
1219 | if (!sn) { | |
5fafdf24 TS |
1220 | snprintf(buf, buf_size, |
1221 | "%-10s%-20s%7s%20s%15s", | |
faea38e7 FB |
1222 | "ID", "TAG", "VM SIZE", "DATE", "VM CLOCK"); |
1223 | } else { | |
1224 | ti = sn->date_sec; | |
3b9f94e1 FB |
1225 | #ifdef _WIN32 |
1226 | ptm = localtime(&ti); | |
1227 | strftime(date_buf, sizeof(date_buf), | |
1228 | "%Y-%m-%d %H:%M:%S", ptm); | |
1229 | #else | |
faea38e7 FB |
1230 | localtime_r(&ti, &tm); |
1231 | strftime(date_buf, sizeof(date_buf), | |
1232 | "%Y-%m-%d %H:%M:%S", &tm); | |
3b9f94e1 | 1233 | #endif |
faea38e7 FB |
1234 | secs = sn->vm_clock_nsec / 1000000000; |
1235 | snprintf(clock_buf, sizeof(clock_buf), | |
1236 | "%02d:%02d:%02d.%03d", | |
1237 | (int)(secs / 3600), | |
1238 | (int)((secs / 60) % 60), | |
5fafdf24 | 1239 | (int)(secs % 60), |
faea38e7 FB |
1240 | (int)((sn->vm_clock_nsec / 1000000) % 1000)); |
1241 | snprintf(buf, buf_size, | |
5fafdf24 | 1242 | "%-10s%-20s%7s%20s%15s", |
faea38e7 FB |
1243 | sn->id_str, sn->name, |
1244 | get_human_readable_size(buf1, sizeof(buf1), sn->vm_state_size), | |
1245 | date_buf, | |
1246 | clock_buf); | |
1247 | } | |
1248 | return buf; | |
1249 | } | |
1250 | ||
83f64091 | 1251 | |
ea2384d3 | 1252 | /**************************************************************/ |
83f64091 | 1253 | /* async I/Os */ |
ea2384d3 | 1254 | |
3b69e4b9 AL |
1255 | typedef struct VectorTranslationState { |
1256 | QEMUIOVector *iov; | |
1257 | uint8_t *bounce; | |
1258 | int is_write; | |
1259 | BlockDriverAIOCB *aiocb; | |
1260 | BlockDriverAIOCB *this_aiocb; | |
1261 | } VectorTranslationState; | |
1262 | ||
1263 | static void bdrv_aio_rw_vector_cb(void *opaque, int ret) | |
1264 | { | |
1265 | VectorTranslationState *s = opaque; | |
1266 | ||
1267 | if (!s->is_write) { | |
249aa745 | 1268 | qemu_iovec_from_buffer(s->iov, s->bounce, s->iov->size); |
3b69e4b9 | 1269 | } |
d905dba4 | 1270 | qemu_vfree(s->bounce); |
3b69e4b9 AL |
1271 | s->this_aiocb->cb(s->this_aiocb->opaque, ret); |
1272 | qemu_aio_release(s->this_aiocb); | |
1273 | } | |
1274 | ||
1275 | static BlockDriverAIOCB *bdrv_aio_rw_vector(BlockDriverState *bs, | |
1276 | int64_t sector_num, | |
1277 | QEMUIOVector *iov, | |
1278 | int nb_sectors, | |
1279 | BlockDriverCompletionFunc *cb, | |
1280 | void *opaque, | |
1281 | int is_write) | |
1282 | ||
1283 | { | |
1284 | VectorTranslationState *s = qemu_mallocz(sizeof(*s)); | |
1285 | BlockDriverAIOCB *aiocb = qemu_aio_get(bs, cb, opaque); | |
1286 | ||
1287 | s->this_aiocb = aiocb; | |
1288 | s->iov = iov; | |
1289 | s->bounce = qemu_memalign(512, nb_sectors * 512); | |
1290 | s->is_write = is_write; | |
1291 | if (is_write) { | |
1292 | qemu_iovec_to_buffer(s->iov, s->bounce); | |
1293 | s->aiocb = bdrv_aio_write(bs, sector_num, s->bounce, nb_sectors, | |
1294 | bdrv_aio_rw_vector_cb, s); | |
1295 | } else { | |
1296 | s->aiocb = bdrv_aio_read(bs, sector_num, s->bounce, nb_sectors, | |
1297 | bdrv_aio_rw_vector_cb, s); | |
1298 | } | |
1299 | return aiocb; | |
1300 | } | |
1301 | ||
1302 | BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num, | |
1303 | QEMUIOVector *iov, int nb_sectors, | |
1304 | BlockDriverCompletionFunc *cb, void *opaque) | |
1305 | { | |
71d0770c AL |
1306 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
1307 | return NULL; | |
1308 | ||
3b69e4b9 AL |
1309 | return bdrv_aio_rw_vector(bs, sector_num, iov, nb_sectors, |
1310 | cb, opaque, 0); | |
1311 | } | |
1312 | ||
1313 | BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num, | |
1314 | QEMUIOVector *iov, int nb_sectors, | |
1315 | BlockDriverCompletionFunc *cb, void *opaque) | |
1316 | { | |
71d0770c AL |
1317 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
1318 | return NULL; | |
1319 | ||
3b69e4b9 AL |
1320 | return bdrv_aio_rw_vector(bs, sector_num, iov, nb_sectors, |
1321 | cb, opaque, 1); | |
1322 | } | |
1323 | ||
ce1a14dc PB |
1324 | BlockDriverAIOCB *bdrv_aio_read(BlockDriverState *bs, int64_t sector_num, |
1325 | uint8_t *buf, int nb_sectors, | |
1326 | BlockDriverCompletionFunc *cb, void *opaque) | |
83f64091 FB |
1327 | { |
1328 | BlockDriver *drv = bs->drv; | |
a36e69dd | 1329 | BlockDriverAIOCB *ret; |
83f64091 | 1330 | |
19cb3738 | 1331 | if (!drv) |
ce1a14dc | 1332 | return NULL; |
71d0770c AL |
1333 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
1334 | return NULL; | |
3b46e624 | 1335 | |
a36e69dd TS |
1336 | ret = drv->bdrv_aio_read(bs, sector_num, buf, nb_sectors, cb, opaque); |
1337 | ||
1338 | if (ret) { | |
1339 | /* Update stats even though technically transfer has not happened. */ | |
1340 | bs->rd_bytes += (unsigned) nb_sectors * SECTOR_SIZE; | |
1341 | bs->rd_ops ++; | |
1342 | } | |
1343 | ||
1344 | return ret; | |
ea2384d3 FB |
1345 | } |
1346 | ||
ce1a14dc PB |
1347 | BlockDriverAIOCB *bdrv_aio_write(BlockDriverState *bs, int64_t sector_num, |
1348 | const uint8_t *buf, int nb_sectors, | |
1349 | BlockDriverCompletionFunc *cb, void *opaque) | |
ea2384d3 | 1350 | { |
83f64091 | 1351 | BlockDriver *drv = bs->drv; |
a36e69dd | 1352 | BlockDriverAIOCB *ret; |
ea2384d3 | 1353 | |
19cb3738 | 1354 | if (!drv) |
ce1a14dc | 1355 | return NULL; |
83f64091 | 1356 | if (bs->read_only) |
ce1a14dc | 1357 | return NULL; |
71d0770c AL |
1358 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
1359 | return NULL; | |
83f64091 | 1360 | |
a36e69dd TS |
1361 | ret = drv->bdrv_aio_write(bs, sector_num, buf, nb_sectors, cb, opaque); |
1362 | ||
1363 | if (ret) { | |
1364 | /* Update stats even though technically transfer has not happened. */ | |
1365 | bs->wr_bytes += (unsigned) nb_sectors * SECTOR_SIZE; | |
1366 | bs->wr_ops ++; | |
1367 | } | |
1368 | ||
1369 | return ret; | |
83f64091 FB |
1370 | } |
1371 | ||
1372 | void bdrv_aio_cancel(BlockDriverAIOCB *acb) | |
83f64091 | 1373 | { |
ce1a14dc | 1374 | BlockDriver *drv = acb->bs->drv; |
83f64091 | 1375 | |
3b69e4b9 AL |
1376 | if (acb->cb == bdrv_aio_rw_vector_cb) { |
1377 | VectorTranslationState *s = acb->opaque; | |
1378 | acb = s->aiocb; | |
1379 | } | |
1380 | ||
ce1a14dc | 1381 | drv->bdrv_aio_cancel(acb); |
83f64091 FB |
1382 | } |
1383 | ||
ce1a14dc | 1384 | |
83f64091 FB |
1385 | /**************************************************************/ |
1386 | /* async block device emulation */ | |
1387 | ||
ce1a14dc | 1388 | static void bdrv_aio_bh_cb(void *opaque) |
83f64091 | 1389 | { |
ce1a14dc PB |
1390 | BlockDriverAIOCBSync *acb = opaque; |
1391 | acb->common.cb(acb->common.opaque, acb->ret); | |
1392 | qemu_aio_release(acb); | |
83f64091 | 1393 | } |
beac80cd | 1394 | |
ce1a14dc PB |
1395 | static BlockDriverAIOCB *bdrv_aio_read_em(BlockDriverState *bs, |
1396 | int64_t sector_num, uint8_t *buf, int nb_sectors, | |
1397 | BlockDriverCompletionFunc *cb, void *opaque) | |
83f64091 | 1398 | { |
ce1a14dc | 1399 | BlockDriverAIOCBSync *acb; |
83f64091 | 1400 | int ret; |
ce1a14dc PB |
1401 | |
1402 | acb = qemu_aio_get(bs, cb, opaque); | |
1403 | if (!acb->bh) | |
1404 | acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); | |
1405 | ret = bdrv_read(bs, sector_num, buf, nb_sectors); | |
1406 | acb->ret = ret; | |
1407 | qemu_bh_schedule(acb->bh); | |
1408 | return &acb->common; | |
beac80cd FB |
1409 | } |
1410 | ||
ce1a14dc PB |
1411 | static BlockDriverAIOCB *bdrv_aio_write_em(BlockDriverState *bs, |
1412 | int64_t sector_num, const uint8_t *buf, int nb_sectors, | |
1413 | BlockDriverCompletionFunc *cb, void *opaque) | |
beac80cd | 1414 | { |
ce1a14dc | 1415 | BlockDriverAIOCBSync *acb; |
83f64091 | 1416 | int ret; |
83f64091 | 1417 | |
ce1a14dc PB |
1418 | acb = qemu_aio_get(bs, cb, opaque); |
1419 | if (!acb->bh) | |
1420 | acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); | |
1421 | ret = bdrv_write(bs, sector_num, buf, nb_sectors); | |
1422 | acb->ret = ret; | |
1423 | qemu_bh_schedule(acb->bh); | |
1424 | return &acb->common; | |
beac80cd | 1425 | } |
beac80cd | 1426 | |
ce1a14dc | 1427 | static void bdrv_aio_cancel_em(BlockDriverAIOCB *blockacb) |
ea2384d3 | 1428 | { |
ce1a14dc PB |
1429 | BlockDriverAIOCBSync *acb = (BlockDriverAIOCBSync *)blockacb; |
1430 | qemu_bh_cancel(acb->bh); | |
1431 | qemu_aio_release(acb); | |
83f64091 | 1432 | } |
ea2384d3 | 1433 | |
83f64091 FB |
1434 | /**************************************************************/ |
1435 | /* sync block device emulation */ | |
ea2384d3 | 1436 | |
83f64091 FB |
1437 | static void bdrv_rw_em_cb(void *opaque, int ret) |
1438 | { | |
1439 | *(int *)opaque = ret; | |
ea2384d3 FB |
1440 | } |
1441 | ||
83f64091 FB |
1442 | #define NOT_DONE 0x7fffffff |
1443 | ||
5fafdf24 | 1444 | static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
83f64091 | 1445 | uint8_t *buf, int nb_sectors) |
7a6cba61 | 1446 | { |
ce1a14dc PB |
1447 | int async_ret; |
1448 | BlockDriverAIOCB *acb; | |
83f64091 | 1449 | |
83f64091 | 1450 | async_ret = NOT_DONE; |
5fafdf24 | 1451 | acb = bdrv_aio_read(bs, sector_num, buf, nb_sectors, |
83f64091 | 1452 | bdrv_rw_em_cb, &async_ret); |
baf35cb9 | 1453 | if (acb == NULL) |
ce1a14dc | 1454 | return -1; |
baf35cb9 | 1455 | |
83f64091 FB |
1456 | while (async_ret == NOT_DONE) { |
1457 | qemu_aio_wait(); | |
1458 | } | |
baf35cb9 | 1459 | |
83f64091 | 1460 | return async_ret; |
7a6cba61 PB |
1461 | } |
1462 | ||
83f64091 FB |
1463 | static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, |
1464 | const uint8_t *buf, int nb_sectors) | |
1465 | { | |
ce1a14dc PB |
1466 | int async_ret; |
1467 | BlockDriverAIOCB *acb; | |
83f64091 | 1468 | |
83f64091 | 1469 | async_ret = NOT_DONE; |
5fafdf24 | 1470 | acb = bdrv_aio_write(bs, sector_num, buf, nb_sectors, |
83f64091 | 1471 | bdrv_rw_em_cb, &async_ret); |
baf35cb9 | 1472 | if (acb == NULL) |
ce1a14dc | 1473 | return -1; |
83f64091 FB |
1474 | while (async_ret == NOT_DONE) { |
1475 | qemu_aio_wait(); | |
1476 | } | |
83f64091 FB |
1477 | return async_ret; |
1478 | } | |
ea2384d3 FB |
1479 | |
1480 | void bdrv_init(void) | |
1481 | { | |
1482 | bdrv_register(&bdrv_raw); | |
19cb3738 | 1483 | bdrv_register(&bdrv_host_device); |
ea2384d3 FB |
1484 | #ifndef _WIN32 |
1485 | bdrv_register(&bdrv_cow); | |
1486 | #endif | |
1487 | bdrv_register(&bdrv_qcow); | |
1488 | bdrv_register(&bdrv_vmdk); | |
3c56521b | 1489 | bdrv_register(&bdrv_cloop); |
585d0ed9 | 1490 | bdrv_register(&bdrv_dmg); |
a8753c34 | 1491 | bdrv_register(&bdrv_bochs); |
6a0f9e82 | 1492 | bdrv_register(&bdrv_vpc); |
712e7874 | 1493 | bdrv_register(&bdrv_vvfat); |
faea38e7 | 1494 | bdrv_register(&bdrv_qcow2); |
6ada7453 | 1495 | bdrv_register(&bdrv_parallels); |
75818250 | 1496 | bdrv_register(&bdrv_nbd); |
ea2384d3 | 1497 | } |
ce1a14dc PB |
1498 | |
1499 | void *qemu_aio_get(BlockDriverState *bs, BlockDriverCompletionFunc *cb, | |
1500 | void *opaque) | |
1501 | { | |
1502 | BlockDriver *drv; | |
1503 | BlockDriverAIOCB *acb; | |
1504 | ||
1505 | drv = bs->drv; | |
1506 | if (drv->free_aiocb) { | |
1507 | acb = drv->free_aiocb; | |
1508 | drv->free_aiocb = acb->next; | |
1509 | } else { | |
1510 | acb = qemu_mallocz(drv->aiocb_size); | |
ce1a14dc PB |
1511 | } |
1512 | acb->bs = bs; | |
1513 | acb->cb = cb; | |
1514 | acb->opaque = opaque; | |
1515 | return acb; | |
1516 | } | |
1517 | ||
1518 | void qemu_aio_release(void *p) | |
1519 | { | |
1520 | BlockDriverAIOCB *acb = p; | |
1521 | BlockDriver *drv = acb->bs->drv; | |
1522 | acb->next = drv->free_aiocb; | |
1523 | drv->free_aiocb = acb; | |
1524 | } | |
19cb3738 FB |
1525 | |
1526 | /**************************************************************/ | |
1527 | /* removable device support */ | |
1528 | ||
1529 | /** | |
1530 | * Return TRUE if the media is present | |
1531 | */ | |
1532 | int bdrv_is_inserted(BlockDriverState *bs) | |
1533 | { | |
1534 | BlockDriver *drv = bs->drv; | |
1535 | int ret; | |
1536 | if (!drv) | |
1537 | return 0; | |
1538 | if (!drv->bdrv_is_inserted) | |
1539 | return 1; | |
1540 | ret = drv->bdrv_is_inserted(bs); | |
1541 | return ret; | |
1542 | } | |
1543 | ||
1544 | /** | |
1545 | * Return TRUE if the media changed since the last call to this | |
5fafdf24 | 1546 | * function. It is currently only used for floppy disks |
19cb3738 FB |
1547 | */ |
1548 | int bdrv_media_changed(BlockDriverState *bs) | |
1549 | { | |
1550 | BlockDriver *drv = bs->drv; | |
1551 | int ret; | |
1552 | ||
1553 | if (!drv || !drv->bdrv_media_changed) | |
1554 | ret = -ENOTSUP; | |
1555 | else | |
1556 | ret = drv->bdrv_media_changed(bs); | |
1557 | if (ret == -ENOTSUP) | |
1558 | ret = bs->media_changed; | |
1559 | bs->media_changed = 0; | |
1560 | return ret; | |
1561 | } | |
1562 | ||
1563 | /** | |
1564 | * If eject_flag is TRUE, eject the media. Otherwise, close the tray | |
1565 | */ | |
1566 | void bdrv_eject(BlockDriverState *bs, int eject_flag) | |
1567 | { | |
1568 | BlockDriver *drv = bs->drv; | |
1569 | int ret; | |
1570 | ||
1571 | if (!drv || !drv->bdrv_eject) { | |
1572 | ret = -ENOTSUP; | |
1573 | } else { | |
1574 | ret = drv->bdrv_eject(bs, eject_flag); | |
1575 | } | |
1576 | if (ret == -ENOTSUP) { | |
1577 | if (eject_flag) | |
1578 | bdrv_close(bs); | |
1579 | } | |
1580 | } | |
1581 | ||
1582 | int bdrv_is_locked(BlockDriverState *bs) | |
1583 | { | |
1584 | return bs->locked; | |
1585 | } | |
1586 | ||
1587 | /** | |
1588 | * Lock or unlock the media (if it is locked, the user won't be able | |
1589 | * to eject it manually). | |
1590 | */ | |
1591 | void bdrv_set_locked(BlockDriverState *bs, int locked) | |
1592 | { | |
1593 | BlockDriver *drv = bs->drv; | |
1594 | ||
1595 | bs->locked = locked; | |
1596 | if (drv && drv->bdrv_set_locked) { | |
1597 | drv->bdrv_set_locked(bs, locked); | |
1598 | } | |
1599 | } | |
985a03b0 TS |
1600 | |
1601 | /* needed for generic scsi interface */ | |
1602 | ||
1603 | int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) | |
1604 | { | |
1605 | BlockDriver *drv = bs->drv; | |
1606 | ||
1607 | if (drv && drv->bdrv_ioctl) | |
1608 | return drv->bdrv_ioctl(bs, req, buf); | |
1609 | return -ENOTSUP; | |
1610 | } | |
7d780669 AL |
1611 | |
1612 | int bdrv_sg_send_command(BlockDriverState *bs, void *buf, int count) | |
1613 | { | |
04eeb8b6 | 1614 | return bs->drv->bdrv_sg_send_command(bs, buf, count); |
7d780669 AL |
1615 | } |
1616 | ||
1617 | int bdrv_sg_recv_response(BlockDriverState *bs, void *buf, int count) | |
1618 | { | |
04eeb8b6 | 1619 | return bs->drv->bdrv_sg_recv_response(bs, buf, count); |
7d780669 AL |
1620 | } |
1621 | ||
1622 | BlockDriverAIOCB *bdrv_sg_aio_read(BlockDriverState *bs, void *buf, int count, | |
1623 | BlockDriverCompletionFunc *cb, void *opaque) | |
1624 | { | |
04eeb8b6 | 1625 | return bs->drv->bdrv_sg_aio_read(bs, buf, count, cb, opaque); |
7d780669 AL |
1626 | } |
1627 | ||
1628 | BlockDriverAIOCB *bdrv_sg_aio_write(BlockDriverState *bs, void *buf, int count, | |
1629 | BlockDriverCompletionFunc *cb, void *opaque) | |
1630 | { | |
04eeb8b6 | 1631 | return bs->drv->bdrv_sg_aio_write(bs, buf, count, cb, opaque); |
7d780669 | 1632 | } |