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Commit | Line | Data |
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fc01f7e7 FB |
1 | /* |
2 | * QEMU System Emulator block driver | |
5fafdf24 | 3 | * |
fc01f7e7 | 4 | * Copyright (c) 2003 Fabrice Bellard |
5fafdf24 | 5 | * |
fc01f7e7 FB |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
22 | * THE SOFTWARE. | |
23 | */ | |
3990d09a BS |
24 | #include "config-host.h" |
25 | #ifdef _BSD | |
26 | /* include native header before sys-queue.h */ | |
27 | #include <sys/queue.h> | |
28 | #endif | |
29 | ||
faf07963 | 30 | #include "qemu-common.h" |
87ecb68b | 31 | #include "console.h" |
ea2384d3 | 32 | #include "block_int.h" |
fc01f7e7 | 33 | |
7674e7bf FB |
34 | #ifdef _BSD |
35 | #include <sys/types.h> | |
36 | #include <sys/stat.h> | |
37 | #include <sys/ioctl.h> | |
7674e7bf FB |
38 | #include <sys/disk.h> |
39 | #endif | |
40 | ||
83f64091 FB |
41 | #define SECTOR_BITS 9 |
42 | #define SECTOR_SIZE (1 << SECTOR_BITS) | |
43 | ||
a95ad7bc AL |
44 | static AIOPool vectored_aio_pool; |
45 | ||
90765429 FB |
46 | typedef struct BlockDriverAIOCBSync { |
47 | BlockDriverAIOCB common; | |
48 | QEMUBH *bh; | |
49 | int ret; | |
50 | } BlockDriverAIOCBSync; | |
51 | ||
ce1a14dc PB |
52 | static BlockDriverAIOCB *bdrv_aio_read_em(BlockDriverState *bs, |
53 | int64_t sector_num, uint8_t *buf, int nb_sectors, | |
54 | BlockDriverCompletionFunc *cb, void *opaque); | |
55 | static BlockDriverAIOCB *bdrv_aio_write_em(BlockDriverState *bs, | |
56 | int64_t sector_num, const uint8_t *buf, int nb_sectors, | |
57 | BlockDriverCompletionFunc *cb, void *opaque); | |
83f64091 | 58 | static void bdrv_aio_cancel_em(BlockDriverAIOCB *acb); |
5fafdf24 | 59 | static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
83f64091 FB |
60 | uint8_t *buf, int nb_sectors); |
61 | static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, | |
62 | const uint8_t *buf, int nb_sectors); | |
ec530c81 | 63 | |
7ee930d0 BS |
64 | BlockDriverState *bdrv_first; |
65 | ||
ea2384d3 FB |
66 | static BlockDriver *first_drv; |
67 | ||
83f64091 | 68 | int path_is_absolute(const char *path) |
3b0d4f61 | 69 | { |
83f64091 | 70 | const char *p; |
21664424 FB |
71 | #ifdef _WIN32 |
72 | /* specific case for names like: "\\.\d:" */ | |
73 | if (*path == '/' || *path == '\\') | |
74 | return 1; | |
75 | #endif | |
83f64091 FB |
76 | p = strchr(path, ':'); |
77 | if (p) | |
78 | p++; | |
79 | else | |
80 | p = path; | |
3b9f94e1 FB |
81 | #ifdef _WIN32 |
82 | return (*p == '/' || *p == '\\'); | |
83 | #else | |
84 | return (*p == '/'); | |
85 | #endif | |
3b0d4f61 FB |
86 | } |
87 | ||
83f64091 FB |
88 | /* if filename is absolute, just copy it to dest. Otherwise, build a |
89 | path to it by considering it is relative to base_path. URL are | |
90 | supported. */ | |
91 | void path_combine(char *dest, int dest_size, | |
92 | const char *base_path, | |
93 | const char *filename) | |
3b0d4f61 | 94 | { |
83f64091 FB |
95 | const char *p, *p1; |
96 | int len; | |
97 | ||
98 | if (dest_size <= 0) | |
99 | return; | |
100 | if (path_is_absolute(filename)) { | |
101 | pstrcpy(dest, dest_size, filename); | |
102 | } else { | |
103 | p = strchr(base_path, ':'); | |
104 | if (p) | |
105 | p++; | |
106 | else | |
107 | p = base_path; | |
3b9f94e1 FB |
108 | p1 = strrchr(base_path, '/'); |
109 | #ifdef _WIN32 | |
110 | { | |
111 | const char *p2; | |
112 | p2 = strrchr(base_path, '\\'); | |
113 | if (!p1 || p2 > p1) | |
114 | p1 = p2; | |
115 | } | |
116 | #endif | |
83f64091 FB |
117 | if (p1) |
118 | p1++; | |
119 | else | |
120 | p1 = base_path; | |
121 | if (p1 > p) | |
122 | p = p1; | |
123 | len = p - base_path; | |
124 | if (len > dest_size - 1) | |
125 | len = dest_size - 1; | |
126 | memcpy(dest, base_path, len); | |
127 | dest[len] = '\0'; | |
128 | pstrcat(dest, dest_size, filename); | |
3b0d4f61 | 129 | } |
3b0d4f61 FB |
130 | } |
131 | ||
3b0d4f61 | 132 | |
9596ebb7 | 133 | static void bdrv_register(BlockDriver *bdrv) |
ea2384d3 | 134 | { |
ce1a14dc | 135 | if (!bdrv->bdrv_aio_read) { |
83f64091 | 136 | /* add AIO emulation layer */ |
83f64091 FB |
137 | bdrv->bdrv_aio_read = bdrv_aio_read_em; |
138 | bdrv->bdrv_aio_write = bdrv_aio_write_em; | |
139 | bdrv->bdrv_aio_cancel = bdrv_aio_cancel_em; | |
90765429 | 140 | bdrv->aiocb_size = sizeof(BlockDriverAIOCBSync); |
83f64091 FB |
141 | } else if (!bdrv->bdrv_read && !bdrv->bdrv_pread) { |
142 | /* add synchronous IO emulation layer */ | |
143 | bdrv->bdrv_read = bdrv_read_em; | |
144 | bdrv->bdrv_write = bdrv_write_em; | |
145 | } | |
3d2d1e39 | 146 | aio_pool_init(&bdrv->aio_pool, bdrv->aiocb_size, bdrv->bdrv_aio_cancel); |
ea2384d3 FB |
147 | bdrv->next = first_drv; |
148 | first_drv = bdrv; | |
149 | } | |
b338082b FB |
150 | |
151 | /* create a new block device (by default it is empty) */ | |
152 | BlockDriverState *bdrv_new(const char *device_name) | |
153 | { | |
154 | BlockDriverState **pbs, *bs; | |
155 | ||
156 | bs = qemu_mallocz(sizeof(BlockDriverState)); | |
b338082b | 157 | pstrcpy(bs->device_name, sizeof(bs->device_name), device_name); |
ea2384d3 FB |
158 | if (device_name[0] != '\0') { |
159 | /* insert at the end */ | |
160 | pbs = &bdrv_first; | |
161 | while (*pbs != NULL) | |
162 | pbs = &(*pbs)->next; | |
163 | *pbs = bs; | |
164 | } | |
b338082b FB |
165 | return bs; |
166 | } | |
167 | ||
ea2384d3 FB |
168 | BlockDriver *bdrv_find_format(const char *format_name) |
169 | { | |
170 | BlockDriver *drv1; | |
171 | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { | |
172 | if (!strcmp(drv1->format_name, format_name)) | |
173 | return drv1; | |
174 | } | |
175 | return NULL; | |
176 | } | |
177 | ||
5fafdf24 | 178 | int bdrv_create(BlockDriver *drv, |
ea2384d3 FB |
179 | const char *filename, int64_t size_in_sectors, |
180 | const char *backing_file, int flags) | |
181 | { | |
182 | if (!drv->bdrv_create) | |
183 | return -ENOTSUP; | |
184 | return drv->bdrv_create(filename, size_in_sectors, backing_file, flags); | |
185 | } | |
186 | ||
d5249393 | 187 | #ifdef _WIN32 |
95389c86 | 188 | void get_tmp_filename(char *filename, int size) |
d5249393 | 189 | { |
3b9f94e1 | 190 | char temp_dir[MAX_PATH]; |
3b46e624 | 191 | |
3b9f94e1 FB |
192 | GetTempPath(MAX_PATH, temp_dir); |
193 | GetTempFileName(temp_dir, "qem", 0, filename); | |
d5249393 FB |
194 | } |
195 | #else | |
95389c86 | 196 | void get_tmp_filename(char *filename, int size) |
fc01f7e7 | 197 | { |
67b915a5 | 198 | int fd; |
7ccfb2eb | 199 | const char *tmpdir; |
d5249393 | 200 | /* XXX: race condition possible */ |
0badc1ee AJ |
201 | tmpdir = getenv("TMPDIR"); |
202 | if (!tmpdir) | |
203 | tmpdir = "/tmp"; | |
204 | snprintf(filename, size, "%s/vl.XXXXXX", tmpdir); | |
ea2384d3 FB |
205 | fd = mkstemp(filename); |
206 | close(fd); | |
207 | } | |
d5249393 | 208 | #endif |
fc01f7e7 | 209 | |
19cb3738 | 210 | #ifdef _WIN32 |
f45512fe FB |
211 | static int is_windows_drive_prefix(const char *filename) |
212 | { | |
213 | return (((filename[0] >= 'a' && filename[0] <= 'z') || | |
214 | (filename[0] >= 'A' && filename[0] <= 'Z')) && | |
215 | filename[1] == ':'); | |
216 | } | |
3b46e624 | 217 | |
19cb3738 FB |
218 | static int is_windows_drive(const char *filename) |
219 | { | |
5fafdf24 | 220 | if (is_windows_drive_prefix(filename) && |
f45512fe | 221 | filename[2] == '\0') |
19cb3738 FB |
222 | return 1; |
223 | if (strstart(filename, "\\\\.\\", NULL) || | |
224 | strstart(filename, "//./", NULL)) | |
225 | return 1; | |
226 | return 0; | |
227 | } | |
228 | #endif | |
229 | ||
83f64091 FB |
230 | static BlockDriver *find_protocol(const char *filename) |
231 | { | |
232 | BlockDriver *drv1; | |
233 | char protocol[128]; | |
234 | int len; | |
235 | const char *p; | |
19cb3738 FB |
236 | |
237 | #ifdef _WIN32 | |
f45512fe FB |
238 | if (is_windows_drive(filename) || |
239 | is_windows_drive_prefix(filename)) | |
19cb3738 FB |
240 | return &bdrv_raw; |
241 | #endif | |
83f64091 FB |
242 | p = strchr(filename, ':'); |
243 | if (!p) | |
244 | return &bdrv_raw; | |
245 | len = p - filename; | |
246 | if (len > sizeof(protocol) - 1) | |
247 | len = sizeof(protocol) - 1; | |
83f64091 FB |
248 | memcpy(protocol, filename, len); |
249 | protocol[len] = '\0'; | |
250 | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { | |
5fafdf24 | 251 | if (drv1->protocol_name && |
83f64091 FB |
252 | !strcmp(drv1->protocol_name, protocol)) |
253 | return drv1; | |
254 | } | |
255 | return NULL; | |
256 | } | |
257 | ||
7674e7bf FB |
258 | /* XXX: force raw format if block or character device ? It would |
259 | simplify the BSD case */ | |
ea2384d3 FB |
260 | static BlockDriver *find_image_format(const char *filename) |
261 | { | |
83f64091 | 262 | int ret, score, score_max; |
ea2384d3 | 263 | BlockDriver *drv1, *drv; |
83f64091 FB |
264 | uint8_t buf[2048]; |
265 | BlockDriverState *bs; | |
3b46e624 | 266 | |
19cb3738 FB |
267 | /* detect host devices. By convention, /dev/cdrom[N] is always |
268 | recognized as a host CDROM */ | |
269 | if (strstart(filename, "/dev/cdrom", NULL)) | |
270 | return &bdrv_host_device; | |
271 | #ifdef _WIN32 | |
272 | if (is_windows_drive(filename)) | |
273 | return &bdrv_host_device; | |
274 | #else | |
275 | { | |
276 | struct stat st; | |
5fafdf24 | 277 | if (stat(filename, &st) >= 0 && |
19cb3738 FB |
278 | (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) { |
279 | return &bdrv_host_device; | |
280 | } | |
281 | } | |
282 | #endif | |
3b46e624 | 283 | |
83f64091 | 284 | drv = find_protocol(filename); |
19cb3738 | 285 | /* no need to test disk image formats for vvfat */ |
83f64091 FB |
286 | if (drv == &bdrv_vvfat) |
287 | return drv; | |
19cb3738 | 288 | |
83f64091 FB |
289 | ret = bdrv_file_open(&bs, filename, BDRV_O_RDONLY); |
290 | if (ret < 0) | |
291 | return NULL; | |
292 | ret = bdrv_pread(bs, 0, buf, sizeof(buf)); | |
293 | bdrv_delete(bs); | |
294 | if (ret < 0) { | |
295 | return NULL; | |
296 | } | |
297 | ||
ea2384d3 FB |
298 | score_max = 0; |
299 | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { | |
83f64091 FB |
300 | if (drv1->bdrv_probe) { |
301 | score = drv1->bdrv_probe(buf, ret, filename); | |
302 | if (score > score_max) { | |
303 | score_max = score; | |
304 | drv = drv1; | |
305 | } | |
0849bf08 | 306 | } |
fc01f7e7 | 307 | } |
ea2384d3 FB |
308 | return drv; |
309 | } | |
310 | ||
83f64091 | 311 | int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags) |
ea2384d3 | 312 | { |
83f64091 FB |
313 | BlockDriverState *bs; |
314 | int ret; | |
315 | ||
316 | bs = bdrv_new(""); | |
83f64091 FB |
317 | ret = bdrv_open2(bs, filename, flags | BDRV_O_FILE, NULL); |
318 | if (ret < 0) { | |
319 | bdrv_delete(bs); | |
320 | return ret; | |
3b0d4f61 | 321 | } |
71d0770c | 322 | bs->growable = 1; |
83f64091 FB |
323 | *pbs = bs; |
324 | return 0; | |
325 | } | |
326 | ||
327 | int bdrv_open(BlockDriverState *bs, const char *filename, int flags) | |
328 | { | |
329 | return bdrv_open2(bs, filename, flags, NULL); | |
ea2384d3 FB |
330 | } |
331 | ||
83f64091 | 332 | int bdrv_open2(BlockDriverState *bs, const char *filename, int flags, |
ea2384d3 FB |
333 | BlockDriver *drv) |
334 | { | |
83f64091 | 335 | int ret, open_flags; |
eb5c851f TS |
336 | char tmp_filename[PATH_MAX]; |
337 | char backing_filename[PATH_MAX]; | |
3b46e624 | 338 | |
ea2384d3 FB |
339 | bs->read_only = 0; |
340 | bs->is_temporary = 0; | |
341 | bs->encrypted = 0; | |
b786b7cc | 342 | bs->valid_key = 0; |
712e7874 | 343 | |
83f64091 | 344 | if (flags & BDRV_O_SNAPSHOT) { |
ea2384d3 FB |
345 | BlockDriverState *bs1; |
346 | int64_t total_size; | |
7c96d46e | 347 | int is_protocol = 0; |
3b46e624 | 348 | |
ea2384d3 FB |
349 | /* if snapshot, we create a temporary backing file and open it |
350 | instead of opening 'filename' directly */ | |
33e3963e | 351 | |
ea2384d3 FB |
352 | /* if there is a backing file, use it */ |
353 | bs1 = bdrv_new(""); | |
295b492c AL |
354 | ret = bdrv_open(bs1, filename, 0); |
355 | if (ret < 0) { | |
ea2384d3 | 356 | bdrv_delete(bs1); |
295b492c | 357 | return ret; |
ea2384d3 | 358 | } |
83f64091 | 359 | total_size = bdrv_getlength(bs1) >> SECTOR_BITS; |
7c96d46e AL |
360 | |
361 | if (bs1->drv && bs1->drv->protocol_name) | |
362 | is_protocol = 1; | |
363 | ||
ea2384d3 | 364 | bdrv_delete(bs1); |
3b46e624 | 365 | |
ea2384d3 | 366 | get_tmp_filename(tmp_filename, sizeof(tmp_filename)); |
7c96d46e AL |
367 | |
368 | /* Real path is meaningless for protocols */ | |
369 | if (is_protocol) | |
370 | snprintf(backing_filename, sizeof(backing_filename), | |
371 | "%s", filename); | |
372 | else | |
373 | realpath(filename, backing_filename); | |
374 | ||
295b492c AL |
375 | ret = bdrv_create(&bdrv_qcow2, tmp_filename, |
376 | total_size, backing_filename, 0); | |
377 | if (ret < 0) { | |
378 | return ret; | |
ea2384d3 FB |
379 | } |
380 | filename = tmp_filename; | |
381 | bs->is_temporary = 1; | |
382 | } | |
712e7874 | 383 | |
ea2384d3 | 384 | pstrcpy(bs->filename, sizeof(bs->filename), filename); |
83f64091 FB |
385 | if (flags & BDRV_O_FILE) { |
386 | drv = find_protocol(filename); | |
295b492c AL |
387 | } else if (!drv) { |
388 | drv = find_image_format(filename); | |
389 | } | |
390 | if (!drv) { | |
391 | ret = -ENOENT; | |
392 | goto unlink_and_fail; | |
ea2384d3 FB |
393 | } |
394 | bs->drv = drv; | |
395 | bs->opaque = qemu_mallocz(drv->instance_size); | |
83f64091 FB |
396 | /* Note: for compatibility, we open disk image files as RDWR, and |
397 | RDONLY as fallback */ | |
398 | if (!(flags & BDRV_O_FILE)) | |
9f7965c7 | 399 | open_flags = BDRV_O_RDWR | (flags & BDRV_O_CACHE_MASK); |
83f64091 FB |
400 | else |
401 | open_flags = flags & ~(BDRV_O_FILE | BDRV_O_SNAPSHOT); | |
402 | ret = drv->bdrv_open(bs, filename, open_flags); | |
a0a83536 | 403 | if ((ret == -EACCES || ret == -EPERM) && !(flags & BDRV_O_FILE)) { |
9f7965c7 | 404 | ret = drv->bdrv_open(bs, filename, open_flags & ~BDRV_O_RDWR); |
83f64091 FB |
405 | bs->read_only = 1; |
406 | } | |
ea2384d3 FB |
407 | if (ret < 0) { |
408 | qemu_free(bs->opaque); | |
6b21b973 FB |
409 | bs->opaque = NULL; |
410 | bs->drv = NULL; | |
295b492c AL |
411 | unlink_and_fail: |
412 | if (bs->is_temporary) | |
413 | unlink(filename); | |
83f64091 | 414 | return ret; |
33e3963e | 415 | } |
d15a771d FB |
416 | if (drv->bdrv_getlength) { |
417 | bs->total_sectors = bdrv_getlength(bs) >> SECTOR_BITS; | |
418 | } | |
67b915a5 | 419 | #ifndef _WIN32 |
ea2384d3 FB |
420 | if (bs->is_temporary) { |
421 | unlink(filename); | |
422 | } | |
423 | #endif | |
83f64091 | 424 | if (bs->backing_file[0] != '\0') { |
ea2384d3 FB |
425 | /* if there is a backing file, use it */ |
426 | bs->backing_hd = bdrv_new(""); | |
83f64091 FB |
427 | path_combine(backing_filename, sizeof(backing_filename), |
428 | filename, bs->backing_file); | |
295b492c AL |
429 | ret = bdrv_open(bs->backing_hd, backing_filename, open_flags); |
430 | if (ret < 0) { | |
431 | bdrv_close(bs); | |
432 | return ret; | |
433 | } | |
33e3963e FB |
434 | } |
435 | ||
b338082b | 436 | /* call the change callback */ |
19cb3738 | 437 | bs->media_changed = 1; |
b338082b FB |
438 | if (bs->change_cb) |
439 | bs->change_cb(bs->change_opaque); | |
440 | ||
441 | return 0; | |
fc01f7e7 FB |
442 | } |
443 | ||
444 | void bdrv_close(BlockDriverState *bs) | |
445 | { | |
19cb3738 | 446 | if (bs->drv) { |
ea2384d3 FB |
447 | if (bs->backing_hd) |
448 | bdrv_delete(bs->backing_hd); | |
449 | bs->drv->bdrv_close(bs); | |
450 | qemu_free(bs->opaque); | |
451 | #ifdef _WIN32 | |
452 | if (bs->is_temporary) { | |
453 | unlink(bs->filename); | |
454 | } | |
67b915a5 | 455 | #endif |
ea2384d3 FB |
456 | bs->opaque = NULL; |
457 | bs->drv = NULL; | |
b338082b FB |
458 | |
459 | /* call the change callback */ | |
19cb3738 | 460 | bs->media_changed = 1; |
b338082b FB |
461 | if (bs->change_cb) |
462 | bs->change_cb(bs->change_opaque); | |
463 | } | |
464 | } | |
465 | ||
466 | void bdrv_delete(BlockDriverState *bs) | |
467 | { | |
34c6f050 AJ |
468 | BlockDriverState **pbs; |
469 | ||
470 | pbs = &bdrv_first; | |
471 | while (*pbs != bs && *pbs != NULL) | |
472 | pbs = &(*pbs)->next; | |
473 | if (*pbs == bs) | |
474 | *pbs = bs->next; | |
475 | ||
b338082b FB |
476 | bdrv_close(bs); |
477 | qemu_free(bs); | |
fc01f7e7 FB |
478 | } |
479 | ||
33e3963e FB |
480 | /* commit COW file into the raw image */ |
481 | int bdrv_commit(BlockDriverState *bs) | |
482 | { | |
19cb3738 | 483 | BlockDriver *drv = bs->drv; |
83f64091 | 484 | int64_t i, total_sectors; |
ea2384d3 FB |
485 | int n, j; |
486 | unsigned char sector[512]; | |
33e3963e | 487 | |
19cb3738 FB |
488 | if (!drv) |
489 | return -ENOMEDIUM; | |
33e3963e FB |
490 | |
491 | if (bs->read_only) { | |
ea2384d3 | 492 | return -EACCES; |
33e3963e FB |
493 | } |
494 | ||
ea2384d3 FB |
495 | if (!bs->backing_hd) { |
496 | return -ENOTSUP; | |
497 | } | |
33e3963e | 498 | |
83f64091 FB |
499 | total_sectors = bdrv_getlength(bs) >> SECTOR_BITS; |
500 | for (i = 0; i < total_sectors;) { | |
19cb3738 | 501 | if (drv->bdrv_is_allocated(bs, i, 65536, &n)) { |
ea2384d3 FB |
502 | for(j = 0; j < n; j++) { |
503 | if (bdrv_read(bs, i, sector, 1) != 0) { | |
504 | return -EIO; | |
505 | } | |
506 | ||
507 | if (bdrv_write(bs->backing_hd, i, sector, 1) != 0) { | |
508 | return -EIO; | |
509 | } | |
510 | i++; | |
33e3963e | 511 | } |
ea2384d3 FB |
512 | } else { |
513 | i += n; | |
514 | } | |
33e3963e | 515 | } |
95389c86 | 516 | |
19cb3738 FB |
517 | if (drv->bdrv_make_empty) |
518 | return drv->bdrv_make_empty(bs); | |
95389c86 | 519 | |
33e3963e FB |
520 | return 0; |
521 | } | |
522 | ||
71d0770c AL |
523 | static int bdrv_check_byte_request(BlockDriverState *bs, int64_t offset, |
524 | size_t size) | |
525 | { | |
526 | int64_t len; | |
527 | ||
528 | if (!bdrv_is_inserted(bs)) | |
529 | return -ENOMEDIUM; | |
530 | ||
531 | if (bs->growable) | |
532 | return 0; | |
533 | ||
534 | len = bdrv_getlength(bs); | |
535 | ||
9fd0e57d KW |
536 | if (offset < 0) |
537 | return -EIO; | |
538 | ||
539 | if ((offset > len) || (len - offset < size)) | |
71d0770c AL |
540 | return -EIO; |
541 | ||
542 | return 0; | |
543 | } | |
544 | ||
545 | static int bdrv_check_request(BlockDriverState *bs, int64_t sector_num, | |
546 | int nb_sectors) | |
547 | { | |
548 | int64_t offset; | |
549 | ||
550 | /* Deal with byte accesses */ | |
551 | if (sector_num < 0) | |
552 | offset = -sector_num; | |
553 | else | |
554 | offset = sector_num * 512; | |
555 | ||
556 | return bdrv_check_byte_request(bs, offset, nb_sectors * 512); | |
557 | } | |
558 | ||
19cb3738 | 559 | /* return < 0 if error. See bdrv_write() for the return codes */ |
5fafdf24 | 560 | int bdrv_read(BlockDriverState *bs, int64_t sector_num, |
fc01f7e7 FB |
561 | uint8_t *buf, int nb_sectors) |
562 | { | |
ea2384d3 FB |
563 | BlockDriver *drv = bs->drv; |
564 | ||
19cb3738 FB |
565 | if (!drv) |
566 | return -ENOMEDIUM; | |
71d0770c AL |
567 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
568 | return -EIO; | |
b338082b | 569 | |
83f64091 FB |
570 | if (drv->bdrv_pread) { |
571 | int ret, len; | |
572 | len = nb_sectors * 512; | |
573 | ret = drv->bdrv_pread(bs, sector_num * 512, buf, len); | |
574 | if (ret < 0) | |
575 | return ret; | |
576 | else if (ret != len) | |
19cb3738 | 577 | return -EINVAL; |
a36e69dd TS |
578 | else { |
579 | bs->rd_bytes += (unsigned) len; | |
580 | bs->rd_ops ++; | |
83f64091 | 581 | return 0; |
a36e69dd | 582 | } |
83f64091 FB |
583 | } else { |
584 | return drv->bdrv_read(bs, sector_num, buf, nb_sectors); | |
33e3963e | 585 | } |
fc01f7e7 FB |
586 | } |
587 | ||
5fafdf24 | 588 | /* Return < 0 if error. Important errors are: |
19cb3738 FB |
589 | -EIO generic I/O error (may happen for all errors) |
590 | -ENOMEDIUM No media inserted. | |
591 | -EINVAL Invalid sector number or nb_sectors | |
592 | -EACCES Trying to write a read-only device | |
593 | */ | |
5fafdf24 | 594 | int bdrv_write(BlockDriverState *bs, int64_t sector_num, |
fc01f7e7 FB |
595 | const uint8_t *buf, int nb_sectors) |
596 | { | |
83f64091 | 597 | BlockDriver *drv = bs->drv; |
19cb3738 FB |
598 | if (!bs->drv) |
599 | return -ENOMEDIUM; | |
0849bf08 | 600 | if (bs->read_only) |
19cb3738 | 601 | return -EACCES; |
71d0770c AL |
602 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
603 | return -EIO; | |
604 | ||
83f64091 | 605 | if (drv->bdrv_pwrite) { |
42fb2807 | 606 | int ret, len, count = 0; |
83f64091 | 607 | len = nb_sectors * 512; |
42fb2807 AL |
608 | do { |
609 | ret = drv->bdrv_pwrite(bs, sector_num * 512, buf, len - count); | |
610 | if (ret < 0) { | |
611 | printf("bdrv_write ret=%d\n", ret); | |
612 | return ret; | |
613 | } | |
614 | count += ret; | |
615 | buf += ret; | |
616 | } while (count != len); | |
617 | bs->wr_bytes += (unsigned) len; | |
618 | bs->wr_ops ++; | |
619 | return 0; | |
83f64091 | 620 | } |
42fb2807 | 621 | return drv->bdrv_write(bs, sector_num, buf, nb_sectors); |
83f64091 FB |
622 | } |
623 | ||
5fafdf24 | 624 | static int bdrv_pread_em(BlockDriverState *bs, int64_t offset, |
faea38e7 | 625 | uint8_t *buf, int count1) |
83f64091 | 626 | { |
83f64091 FB |
627 | uint8_t tmp_buf[SECTOR_SIZE]; |
628 | int len, nb_sectors, count; | |
629 | int64_t sector_num; | |
630 | ||
631 | count = count1; | |
632 | /* first read to align to sector start */ | |
633 | len = (SECTOR_SIZE - offset) & (SECTOR_SIZE - 1); | |
634 | if (len > count) | |
635 | len = count; | |
636 | sector_num = offset >> SECTOR_BITS; | |
637 | if (len > 0) { | |
638 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) | |
639 | return -EIO; | |
640 | memcpy(buf, tmp_buf + (offset & (SECTOR_SIZE - 1)), len); | |
641 | count -= len; | |
642 | if (count == 0) | |
643 | return count1; | |
644 | sector_num++; | |
645 | buf += len; | |
646 | } | |
647 | ||
648 | /* read the sectors "in place" */ | |
649 | nb_sectors = count >> SECTOR_BITS; | |
650 | if (nb_sectors > 0) { | |
651 | if (bdrv_read(bs, sector_num, buf, nb_sectors) < 0) | |
652 | return -EIO; | |
653 | sector_num += nb_sectors; | |
654 | len = nb_sectors << SECTOR_BITS; | |
655 | buf += len; | |
656 | count -= len; | |
657 | } | |
658 | ||
659 | /* add data from the last sector */ | |
660 | if (count > 0) { | |
661 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) | |
662 | return -EIO; | |
663 | memcpy(buf, tmp_buf, count); | |
664 | } | |
665 | return count1; | |
666 | } | |
667 | ||
5fafdf24 | 668 | static int bdrv_pwrite_em(BlockDriverState *bs, int64_t offset, |
faea38e7 | 669 | const uint8_t *buf, int count1) |
83f64091 | 670 | { |
83f64091 FB |
671 | uint8_t tmp_buf[SECTOR_SIZE]; |
672 | int len, nb_sectors, count; | |
673 | int64_t sector_num; | |
674 | ||
675 | count = count1; | |
676 | /* first write to align to sector start */ | |
677 | len = (SECTOR_SIZE - offset) & (SECTOR_SIZE - 1); | |
678 | if (len > count) | |
679 | len = count; | |
680 | sector_num = offset >> SECTOR_BITS; | |
681 | if (len > 0) { | |
682 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) | |
683 | return -EIO; | |
684 | memcpy(tmp_buf + (offset & (SECTOR_SIZE - 1)), buf, len); | |
685 | if (bdrv_write(bs, sector_num, tmp_buf, 1) < 0) | |
686 | return -EIO; | |
687 | count -= len; | |
688 | if (count == 0) | |
689 | return count1; | |
690 | sector_num++; | |
691 | buf += len; | |
692 | } | |
693 | ||
694 | /* write the sectors "in place" */ | |
695 | nb_sectors = count >> SECTOR_BITS; | |
696 | if (nb_sectors > 0) { | |
697 | if (bdrv_write(bs, sector_num, buf, nb_sectors) < 0) | |
698 | return -EIO; | |
699 | sector_num += nb_sectors; | |
700 | len = nb_sectors << SECTOR_BITS; | |
701 | buf += len; | |
702 | count -= len; | |
703 | } | |
704 | ||
705 | /* add data from the last sector */ | |
706 | if (count > 0) { | |
707 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) | |
708 | return -EIO; | |
709 | memcpy(tmp_buf, buf, count); | |
710 | if (bdrv_write(bs, sector_num, tmp_buf, 1) < 0) | |
711 | return -EIO; | |
712 | } | |
713 | return count1; | |
714 | } | |
83f64091 FB |
715 | |
716 | /** | |
5fafdf24 | 717 | * Read with byte offsets (needed only for file protocols) |
83f64091 | 718 | */ |
5fafdf24 | 719 | int bdrv_pread(BlockDriverState *bs, int64_t offset, |
83f64091 FB |
720 | void *buf1, int count1) |
721 | { | |
722 | BlockDriver *drv = bs->drv; | |
723 | ||
724 | if (!drv) | |
19cb3738 | 725 | return -ENOMEDIUM; |
71d0770c AL |
726 | if (bdrv_check_byte_request(bs, offset, count1)) |
727 | return -EIO; | |
728 | ||
83f64091 | 729 | if (!drv->bdrv_pread) |
faea38e7 | 730 | return bdrv_pread_em(bs, offset, buf1, count1); |
83f64091 FB |
731 | return drv->bdrv_pread(bs, offset, buf1, count1); |
732 | } | |
733 | ||
5fafdf24 TS |
734 | /** |
735 | * Write with byte offsets (needed only for file protocols) | |
83f64091 | 736 | */ |
5fafdf24 | 737 | int bdrv_pwrite(BlockDriverState *bs, int64_t offset, |
83f64091 FB |
738 | const void *buf1, int count1) |
739 | { | |
740 | BlockDriver *drv = bs->drv; | |
741 | ||
742 | if (!drv) | |
19cb3738 | 743 | return -ENOMEDIUM; |
71d0770c AL |
744 | if (bdrv_check_byte_request(bs, offset, count1)) |
745 | return -EIO; | |
746 | ||
83f64091 | 747 | if (!drv->bdrv_pwrite) |
faea38e7 | 748 | return bdrv_pwrite_em(bs, offset, buf1, count1); |
83f64091 FB |
749 | return drv->bdrv_pwrite(bs, offset, buf1, count1); |
750 | } | |
751 | ||
752 | /** | |
753 | * Truncate file to 'offset' bytes (needed only for file protocols) | |
754 | */ | |
755 | int bdrv_truncate(BlockDriverState *bs, int64_t offset) | |
756 | { | |
757 | BlockDriver *drv = bs->drv; | |
758 | if (!drv) | |
19cb3738 | 759 | return -ENOMEDIUM; |
83f64091 FB |
760 | if (!drv->bdrv_truncate) |
761 | return -ENOTSUP; | |
762 | return drv->bdrv_truncate(bs, offset); | |
763 | } | |
764 | ||
765 | /** | |
766 | * Length of a file in bytes. Return < 0 if error or unknown. | |
767 | */ | |
768 | int64_t bdrv_getlength(BlockDriverState *bs) | |
769 | { | |
770 | BlockDriver *drv = bs->drv; | |
771 | if (!drv) | |
19cb3738 | 772 | return -ENOMEDIUM; |
83f64091 FB |
773 | if (!drv->bdrv_getlength) { |
774 | /* legacy mode */ | |
775 | return bs->total_sectors * SECTOR_SIZE; | |
776 | } | |
777 | return drv->bdrv_getlength(bs); | |
fc01f7e7 FB |
778 | } |
779 | ||
19cb3738 | 780 | /* return 0 as number of sectors if no device present or error */ |
96b8f136 | 781 | void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr) |
fc01f7e7 | 782 | { |
19cb3738 FB |
783 | int64_t length; |
784 | length = bdrv_getlength(bs); | |
785 | if (length < 0) | |
786 | length = 0; | |
787 | else | |
788 | length = length >> SECTOR_BITS; | |
789 | *nb_sectors_ptr = length; | |
fc01f7e7 | 790 | } |
cf98951b | 791 | |
f3d54fc4 AL |
792 | struct partition { |
793 | uint8_t boot_ind; /* 0x80 - active */ | |
794 | uint8_t head; /* starting head */ | |
795 | uint8_t sector; /* starting sector */ | |
796 | uint8_t cyl; /* starting cylinder */ | |
797 | uint8_t sys_ind; /* What partition type */ | |
798 | uint8_t end_head; /* end head */ | |
799 | uint8_t end_sector; /* end sector */ | |
800 | uint8_t end_cyl; /* end cylinder */ | |
801 | uint32_t start_sect; /* starting sector counting from 0 */ | |
802 | uint32_t nr_sects; /* nr of sectors in partition */ | |
803 | } __attribute__((packed)); | |
804 | ||
805 | /* try to guess the disk logical geometry from the MSDOS partition table. Return 0 if OK, -1 if could not guess */ | |
806 | static int guess_disk_lchs(BlockDriverState *bs, | |
807 | int *pcylinders, int *pheads, int *psectors) | |
808 | { | |
809 | uint8_t buf[512]; | |
810 | int ret, i, heads, sectors, cylinders; | |
811 | struct partition *p; | |
812 | uint32_t nr_sects; | |
a38131b6 | 813 | uint64_t nb_sectors; |
f3d54fc4 AL |
814 | |
815 | bdrv_get_geometry(bs, &nb_sectors); | |
816 | ||
817 | ret = bdrv_read(bs, 0, buf, 1); | |
818 | if (ret < 0) | |
819 | return -1; | |
820 | /* test msdos magic */ | |
821 | if (buf[510] != 0x55 || buf[511] != 0xaa) | |
822 | return -1; | |
823 | for(i = 0; i < 4; i++) { | |
824 | p = ((struct partition *)(buf + 0x1be)) + i; | |
825 | nr_sects = le32_to_cpu(p->nr_sects); | |
826 | if (nr_sects && p->end_head) { | |
827 | /* We make the assumption that the partition terminates on | |
828 | a cylinder boundary */ | |
829 | heads = p->end_head + 1; | |
830 | sectors = p->end_sector & 63; | |
831 | if (sectors == 0) | |
832 | continue; | |
833 | cylinders = nb_sectors / (heads * sectors); | |
834 | if (cylinders < 1 || cylinders > 16383) | |
835 | continue; | |
836 | *pheads = heads; | |
837 | *psectors = sectors; | |
838 | *pcylinders = cylinders; | |
839 | #if 0 | |
840 | printf("guessed geometry: LCHS=%d %d %d\n", | |
841 | cylinders, heads, sectors); | |
842 | #endif | |
843 | return 0; | |
844 | } | |
845 | } | |
846 | return -1; | |
847 | } | |
848 | ||
849 | void bdrv_guess_geometry(BlockDriverState *bs, int *pcyls, int *pheads, int *psecs) | |
850 | { | |
851 | int translation, lba_detected = 0; | |
852 | int cylinders, heads, secs; | |
a38131b6 | 853 | uint64_t nb_sectors; |
f3d54fc4 AL |
854 | |
855 | /* if a geometry hint is available, use it */ | |
856 | bdrv_get_geometry(bs, &nb_sectors); | |
857 | bdrv_get_geometry_hint(bs, &cylinders, &heads, &secs); | |
858 | translation = bdrv_get_translation_hint(bs); | |
859 | if (cylinders != 0) { | |
860 | *pcyls = cylinders; | |
861 | *pheads = heads; | |
862 | *psecs = secs; | |
863 | } else { | |
864 | if (guess_disk_lchs(bs, &cylinders, &heads, &secs) == 0) { | |
865 | if (heads > 16) { | |
866 | /* if heads > 16, it means that a BIOS LBA | |
867 | translation was active, so the default | |
868 | hardware geometry is OK */ | |
869 | lba_detected = 1; | |
870 | goto default_geometry; | |
871 | } else { | |
872 | *pcyls = cylinders; | |
873 | *pheads = heads; | |
874 | *psecs = secs; | |
875 | /* disable any translation to be in sync with | |
876 | the logical geometry */ | |
877 | if (translation == BIOS_ATA_TRANSLATION_AUTO) { | |
878 | bdrv_set_translation_hint(bs, | |
879 | BIOS_ATA_TRANSLATION_NONE); | |
880 | } | |
881 | } | |
882 | } else { | |
883 | default_geometry: | |
884 | /* if no geometry, use a standard physical disk geometry */ | |
885 | cylinders = nb_sectors / (16 * 63); | |
886 | ||
887 | if (cylinders > 16383) | |
888 | cylinders = 16383; | |
889 | else if (cylinders < 2) | |
890 | cylinders = 2; | |
891 | *pcyls = cylinders; | |
892 | *pheads = 16; | |
893 | *psecs = 63; | |
894 | if ((lba_detected == 1) && (translation == BIOS_ATA_TRANSLATION_AUTO)) { | |
895 | if ((*pcyls * *pheads) <= 131072) { | |
896 | bdrv_set_translation_hint(bs, | |
897 | BIOS_ATA_TRANSLATION_LARGE); | |
898 | } else { | |
899 | bdrv_set_translation_hint(bs, | |
900 | BIOS_ATA_TRANSLATION_LBA); | |
901 | } | |
902 | } | |
903 | } | |
904 | bdrv_set_geometry_hint(bs, *pcyls, *pheads, *psecs); | |
905 | } | |
906 | } | |
907 | ||
5fafdf24 | 908 | void bdrv_set_geometry_hint(BlockDriverState *bs, |
b338082b FB |
909 | int cyls, int heads, int secs) |
910 | { | |
911 | bs->cyls = cyls; | |
912 | bs->heads = heads; | |
913 | bs->secs = secs; | |
914 | } | |
915 | ||
916 | void bdrv_set_type_hint(BlockDriverState *bs, int type) | |
917 | { | |
918 | bs->type = type; | |
919 | bs->removable = ((type == BDRV_TYPE_CDROM || | |
920 | type == BDRV_TYPE_FLOPPY)); | |
921 | } | |
922 | ||
46d4767d FB |
923 | void bdrv_set_translation_hint(BlockDriverState *bs, int translation) |
924 | { | |
925 | bs->translation = translation; | |
926 | } | |
927 | ||
5fafdf24 | 928 | void bdrv_get_geometry_hint(BlockDriverState *bs, |
b338082b FB |
929 | int *pcyls, int *pheads, int *psecs) |
930 | { | |
931 | *pcyls = bs->cyls; | |
932 | *pheads = bs->heads; | |
933 | *psecs = bs->secs; | |
934 | } | |
935 | ||
936 | int bdrv_get_type_hint(BlockDriverState *bs) | |
937 | { | |
938 | return bs->type; | |
939 | } | |
940 | ||
46d4767d FB |
941 | int bdrv_get_translation_hint(BlockDriverState *bs) |
942 | { | |
943 | return bs->translation; | |
944 | } | |
945 | ||
b338082b FB |
946 | int bdrv_is_removable(BlockDriverState *bs) |
947 | { | |
948 | return bs->removable; | |
949 | } | |
950 | ||
951 | int bdrv_is_read_only(BlockDriverState *bs) | |
952 | { | |
953 | return bs->read_only; | |
954 | } | |
955 | ||
985a03b0 TS |
956 | int bdrv_is_sg(BlockDriverState *bs) |
957 | { | |
958 | return bs->sg; | |
959 | } | |
960 | ||
19cb3738 | 961 | /* XXX: no longer used */ |
5fafdf24 | 962 | void bdrv_set_change_cb(BlockDriverState *bs, |
b338082b FB |
963 | void (*change_cb)(void *opaque), void *opaque) |
964 | { | |
965 | bs->change_cb = change_cb; | |
966 | bs->change_opaque = opaque; | |
967 | } | |
968 | ||
ea2384d3 FB |
969 | int bdrv_is_encrypted(BlockDriverState *bs) |
970 | { | |
971 | if (bs->backing_hd && bs->backing_hd->encrypted) | |
972 | return 1; | |
973 | return bs->encrypted; | |
974 | } | |
975 | ||
b786b7cc AL |
976 | int bdrv_key_required(BlockDriverState *bs) |
977 | { | |
978 | BlockDriverState *backing_hd = bs->backing_hd; | |
979 | ||
980 | if (backing_hd && backing_hd->encrypted && !backing_hd->valid_key) | |
981 | return 1; | |
982 | return (bs->encrypted && !bs->valid_key); | |
983 | } | |
984 | ||
ea2384d3 FB |
985 | int bdrv_set_key(BlockDriverState *bs, const char *key) |
986 | { | |
987 | int ret; | |
988 | if (bs->backing_hd && bs->backing_hd->encrypted) { | |
989 | ret = bdrv_set_key(bs->backing_hd, key); | |
990 | if (ret < 0) | |
991 | return ret; | |
992 | if (!bs->encrypted) | |
993 | return 0; | |
994 | } | |
995 | if (!bs->encrypted || !bs->drv || !bs->drv->bdrv_set_key) | |
996 | return -1; | |
b786b7cc AL |
997 | ret = bs->drv->bdrv_set_key(bs, key); |
998 | bs->valid_key = (ret == 0); | |
999 | return ret; | |
ea2384d3 FB |
1000 | } |
1001 | ||
1002 | void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size) | |
1003 | { | |
19cb3738 | 1004 | if (!bs->drv) { |
ea2384d3 FB |
1005 | buf[0] = '\0'; |
1006 | } else { | |
1007 | pstrcpy(buf, buf_size, bs->drv->format_name); | |
1008 | } | |
1009 | } | |
1010 | ||
5fafdf24 | 1011 | void bdrv_iterate_format(void (*it)(void *opaque, const char *name), |
ea2384d3 FB |
1012 | void *opaque) |
1013 | { | |
1014 | BlockDriver *drv; | |
1015 | ||
1016 | for (drv = first_drv; drv != NULL; drv = drv->next) { | |
1017 | it(opaque, drv->format_name); | |
1018 | } | |
1019 | } | |
1020 | ||
b338082b FB |
1021 | BlockDriverState *bdrv_find(const char *name) |
1022 | { | |
1023 | BlockDriverState *bs; | |
1024 | ||
1025 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { | |
1026 | if (!strcmp(name, bs->device_name)) | |
1027 | return bs; | |
1028 | } | |
1029 | return NULL; | |
1030 | } | |
1031 | ||
cb5745c5 | 1032 | void bdrv_iterate(void (*it)(void *opaque, BlockDriverState *bs), void *opaque) |
81d0912d FB |
1033 | { |
1034 | BlockDriverState *bs; | |
1035 | ||
1036 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { | |
cb5745c5 | 1037 | it(opaque, bs); |
81d0912d FB |
1038 | } |
1039 | } | |
1040 | ||
ea2384d3 FB |
1041 | const char *bdrv_get_device_name(BlockDriverState *bs) |
1042 | { | |
1043 | return bs->device_name; | |
1044 | } | |
1045 | ||
7a6cba61 PB |
1046 | void bdrv_flush(BlockDriverState *bs) |
1047 | { | |
1048 | if (bs->drv->bdrv_flush) | |
1049 | bs->drv->bdrv_flush(bs); | |
1050 | if (bs->backing_hd) | |
1051 | bdrv_flush(bs->backing_hd); | |
1052 | } | |
1053 | ||
c6ca28d6 AL |
1054 | void bdrv_flush_all(void) |
1055 | { | |
1056 | BlockDriverState *bs; | |
1057 | ||
1058 | for (bs = bdrv_first; bs != NULL; bs = bs->next) | |
1059 | if (bs->drv && !bdrv_is_read_only(bs) && | |
1060 | (!bdrv_is_removable(bs) || bdrv_is_inserted(bs))) | |
1061 | bdrv_flush(bs); | |
1062 | } | |
1063 | ||
f58c7b35 TS |
1064 | /* |
1065 | * Returns true iff the specified sector is present in the disk image. Drivers | |
1066 | * not implementing the functionality are assumed to not support backing files, | |
1067 | * hence all their sectors are reported as allocated. | |
1068 | * | |
1069 | * 'pnum' is set to the number of sectors (including and immediately following | |
1070 | * the specified sector) that are known to be in the same | |
1071 | * allocated/unallocated state. | |
1072 | * | |
1073 | * 'nb_sectors' is the max value 'pnum' should be set to. | |
1074 | */ | |
1075 | int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, | |
1076 | int *pnum) | |
1077 | { | |
1078 | int64_t n; | |
1079 | if (!bs->drv->bdrv_is_allocated) { | |
1080 | if (sector_num >= bs->total_sectors) { | |
1081 | *pnum = 0; | |
1082 | return 0; | |
1083 | } | |
1084 | n = bs->total_sectors - sector_num; | |
1085 | *pnum = (n < nb_sectors) ? (n) : (nb_sectors); | |
1086 | return 1; | |
1087 | } | |
1088 | return bs->drv->bdrv_is_allocated(bs, sector_num, nb_sectors, pnum); | |
1089 | } | |
1090 | ||
b338082b FB |
1091 | void bdrv_info(void) |
1092 | { | |
1093 | BlockDriverState *bs; | |
1094 | ||
1095 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { | |
1096 | term_printf("%s:", bs->device_name); | |
1097 | term_printf(" type="); | |
1098 | switch(bs->type) { | |
1099 | case BDRV_TYPE_HD: | |
1100 | term_printf("hd"); | |
1101 | break; | |
1102 | case BDRV_TYPE_CDROM: | |
1103 | term_printf("cdrom"); | |
1104 | break; | |
1105 | case BDRV_TYPE_FLOPPY: | |
1106 | term_printf("floppy"); | |
1107 | break; | |
1108 | } | |
1109 | term_printf(" removable=%d", bs->removable); | |
1110 | if (bs->removable) { | |
1111 | term_printf(" locked=%d", bs->locked); | |
1112 | } | |
19cb3738 | 1113 | if (bs->drv) { |
fef30743 TS |
1114 | term_printf(" file="); |
1115 | term_print_filename(bs->filename); | |
1116 | if (bs->backing_file[0] != '\0') { | |
1117 | term_printf(" backing_file="); | |
1118 | term_print_filename(bs->backing_file); | |
1119 | } | |
b338082b | 1120 | term_printf(" ro=%d", bs->read_only); |
ea2384d3 | 1121 | term_printf(" drv=%s", bs->drv->format_name); |
d3be2b2f | 1122 | term_printf(" encrypted=%d", bdrv_is_encrypted(bs)); |
b338082b FB |
1123 | } else { |
1124 | term_printf(" [not inserted]"); | |
1125 | } | |
1126 | term_printf("\n"); | |
1127 | } | |
1128 | } | |
a36e69dd TS |
1129 | |
1130 | /* The "info blockstats" command. */ | |
1131 | void bdrv_info_stats (void) | |
1132 | { | |
1133 | BlockDriverState *bs; | |
1134 | ||
1135 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { | |
1136 | term_printf ("%s:" | |
1137 | " rd_bytes=%" PRIu64 | |
1138 | " wr_bytes=%" PRIu64 | |
1139 | " rd_operations=%" PRIu64 | |
1140 | " wr_operations=%" PRIu64 | |
414c0781 | 1141 | "\n", |
a36e69dd TS |
1142 | bs->device_name, |
1143 | bs->rd_bytes, bs->wr_bytes, | |
1144 | bs->rd_ops, bs->wr_ops); | |
1145 | } | |
1146 | } | |
ea2384d3 | 1147 | |
49780457 AL |
1148 | const char *bdrv_get_encrypted_filename(BlockDriverState *bs) |
1149 | { | |
1150 | if (bs->backing_hd && bs->backing_hd->encrypted) | |
1151 | return bs->backing_file; | |
1152 | else if (bs->encrypted) | |
1153 | return bs->filename; | |
1154 | else | |
1155 | return NULL; | |
1156 | } | |
1157 | ||
5fafdf24 | 1158 | void bdrv_get_backing_filename(BlockDriverState *bs, |
83f64091 FB |
1159 | char *filename, int filename_size) |
1160 | { | |
1161 | if (!bs->backing_hd) { | |
1162 | pstrcpy(filename, filename_size, ""); | |
1163 | } else { | |
1164 | pstrcpy(filename, filename_size, bs->backing_file); | |
1165 | } | |
1166 | } | |
1167 | ||
5fafdf24 | 1168 | int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num, |
faea38e7 FB |
1169 | const uint8_t *buf, int nb_sectors) |
1170 | { | |
1171 | BlockDriver *drv = bs->drv; | |
1172 | if (!drv) | |
19cb3738 | 1173 | return -ENOMEDIUM; |
faea38e7 FB |
1174 | if (!drv->bdrv_write_compressed) |
1175 | return -ENOTSUP; | |
9fd0e57d KW |
1176 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
1177 | return -EIO; | |
faea38e7 FB |
1178 | return drv->bdrv_write_compressed(bs, sector_num, buf, nb_sectors); |
1179 | } | |
3b46e624 | 1180 | |
faea38e7 FB |
1181 | int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) |
1182 | { | |
1183 | BlockDriver *drv = bs->drv; | |
1184 | if (!drv) | |
19cb3738 | 1185 | return -ENOMEDIUM; |
faea38e7 FB |
1186 | if (!drv->bdrv_get_info) |
1187 | return -ENOTSUP; | |
1188 | memset(bdi, 0, sizeof(*bdi)); | |
1189 | return drv->bdrv_get_info(bs, bdi); | |
1190 | } | |
1191 | ||
8d47bb61 AL |
1192 | int bdrv_put_buffer(BlockDriverState *bs, const uint8_t *buf, int64_t pos, int size) |
1193 | { | |
1194 | BlockDriver *drv = bs->drv; | |
1195 | if (!drv) | |
1196 | return -ENOMEDIUM; | |
1197 | if (!drv->bdrv_put_buffer) | |
1198 | return -ENOTSUP; | |
1199 | return drv->bdrv_put_buffer(bs, buf, pos, size); | |
1200 | } | |
1201 | ||
1202 | int bdrv_get_buffer(BlockDriverState *bs, uint8_t *buf, int64_t pos, int size) | |
1203 | { | |
1204 | BlockDriver *drv = bs->drv; | |
1205 | if (!drv) | |
1206 | return -ENOMEDIUM; | |
1207 | if (!drv->bdrv_get_buffer) | |
1208 | return -ENOTSUP; | |
1209 | return drv->bdrv_get_buffer(bs, buf, pos, size); | |
1210 | } | |
1211 | ||
faea38e7 FB |
1212 | /**************************************************************/ |
1213 | /* handling of snapshots */ | |
1214 | ||
5fafdf24 | 1215 | int bdrv_snapshot_create(BlockDriverState *bs, |
faea38e7 FB |
1216 | QEMUSnapshotInfo *sn_info) |
1217 | { | |
1218 | BlockDriver *drv = bs->drv; | |
1219 | if (!drv) | |
19cb3738 | 1220 | return -ENOMEDIUM; |
faea38e7 FB |
1221 | if (!drv->bdrv_snapshot_create) |
1222 | return -ENOTSUP; | |
1223 | return drv->bdrv_snapshot_create(bs, sn_info); | |
1224 | } | |
1225 | ||
5fafdf24 | 1226 | int bdrv_snapshot_goto(BlockDriverState *bs, |
faea38e7 FB |
1227 | const char *snapshot_id) |
1228 | { | |
1229 | BlockDriver *drv = bs->drv; | |
1230 | if (!drv) | |
19cb3738 | 1231 | return -ENOMEDIUM; |
faea38e7 FB |
1232 | if (!drv->bdrv_snapshot_goto) |
1233 | return -ENOTSUP; | |
1234 | return drv->bdrv_snapshot_goto(bs, snapshot_id); | |
1235 | } | |
1236 | ||
1237 | int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id) | |
1238 | { | |
1239 | BlockDriver *drv = bs->drv; | |
1240 | if (!drv) | |
19cb3738 | 1241 | return -ENOMEDIUM; |
faea38e7 FB |
1242 | if (!drv->bdrv_snapshot_delete) |
1243 | return -ENOTSUP; | |
1244 | return drv->bdrv_snapshot_delete(bs, snapshot_id); | |
1245 | } | |
1246 | ||
5fafdf24 | 1247 | int bdrv_snapshot_list(BlockDriverState *bs, |
faea38e7 FB |
1248 | QEMUSnapshotInfo **psn_info) |
1249 | { | |
1250 | BlockDriver *drv = bs->drv; | |
1251 | if (!drv) | |
19cb3738 | 1252 | return -ENOMEDIUM; |
faea38e7 FB |
1253 | if (!drv->bdrv_snapshot_list) |
1254 | return -ENOTSUP; | |
1255 | return drv->bdrv_snapshot_list(bs, psn_info); | |
1256 | } | |
1257 | ||
1258 | #define NB_SUFFIXES 4 | |
1259 | ||
1260 | char *get_human_readable_size(char *buf, int buf_size, int64_t size) | |
1261 | { | |
1262 | static const char suffixes[NB_SUFFIXES] = "KMGT"; | |
1263 | int64_t base; | |
1264 | int i; | |
1265 | ||
1266 | if (size <= 999) { | |
1267 | snprintf(buf, buf_size, "%" PRId64, size); | |
1268 | } else { | |
1269 | base = 1024; | |
1270 | for(i = 0; i < NB_SUFFIXES; i++) { | |
1271 | if (size < (10 * base)) { | |
5fafdf24 | 1272 | snprintf(buf, buf_size, "%0.1f%c", |
faea38e7 FB |
1273 | (double)size / base, |
1274 | suffixes[i]); | |
1275 | break; | |
1276 | } else if (size < (1000 * base) || i == (NB_SUFFIXES - 1)) { | |
5fafdf24 | 1277 | snprintf(buf, buf_size, "%" PRId64 "%c", |
faea38e7 FB |
1278 | ((size + (base >> 1)) / base), |
1279 | suffixes[i]); | |
1280 | break; | |
1281 | } | |
1282 | base = base * 1024; | |
1283 | } | |
1284 | } | |
1285 | return buf; | |
1286 | } | |
1287 | ||
1288 | char *bdrv_snapshot_dump(char *buf, int buf_size, QEMUSnapshotInfo *sn) | |
1289 | { | |
1290 | char buf1[128], date_buf[128], clock_buf[128]; | |
3b9f94e1 FB |
1291 | #ifdef _WIN32 |
1292 | struct tm *ptm; | |
1293 | #else | |
faea38e7 | 1294 | struct tm tm; |
3b9f94e1 | 1295 | #endif |
faea38e7 FB |
1296 | time_t ti; |
1297 | int64_t secs; | |
1298 | ||
1299 | if (!sn) { | |
5fafdf24 TS |
1300 | snprintf(buf, buf_size, |
1301 | "%-10s%-20s%7s%20s%15s", | |
faea38e7 FB |
1302 | "ID", "TAG", "VM SIZE", "DATE", "VM CLOCK"); |
1303 | } else { | |
1304 | ti = sn->date_sec; | |
3b9f94e1 FB |
1305 | #ifdef _WIN32 |
1306 | ptm = localtime(&ti); | |
1307 | strftime(date_buf, sizeof(date_buf), | |
1308 | "%Y-%m-%d %H:%M:%S", ptm); | |
1309 | #else | |
faea38e7 FB |
1310 | localtime_r(&ti, &tm); |
1311 | strftime(date_buf, sizeof(date_buf), | |
1312 | "%Y-%m-%d %H:%M:%S", &tm); | |
3b9f94e1 | 1313 | #endif |
faea38e7 FB |
1314 | secs = sn->vm_clock_nsec / 1000000000; |
1315 | snprintf(clock_buf, sizeof(clock_buf), | |
1316 | "%02d:%02d:%02d.%03d", | |
1317 | (int)(secs / 3600), | |
1318 | (int)((secs / 60) % 60), | |
5fafdf24 | 1319 | (int)(secs % 60), |
faea38e7 FB |
1320 | (int)((sn->vm_clock_nsec / 1000000) % 1000)); |
1321 | snprintf(buf, buf_size, | |
5fafdf24 | 1322 | "%-10s%-20s%7s%20s%15s", |
faea38e7 FB |
1323 | sn->id_str, sn->name, |
1324 | get_human_readable_size(buf1, sizeof(buf1), sn->vm_state_size), | |
1325 | date_buf, | |
1326 | clock_buf); | |
1327 | } | |
1328 | return buf; | |
1329 | } | |
1330 | ||
83f64091 | 1331 | |
ea2384d3 | 1332 | /**************************************************************/ |
83f64091 | 1333 | /* async I/Os */ |
ea2384d3 | 1334 | |
abe73c32 AL |
1335 | typedef struct VectorTranslationAIOCB { |
1336 | BlockDriverAIOCB common; | |
3b69e4b9 AL |
1337 | QEMUIOVector *iov; |
1338 | uint8_t *bounce; | |
1339 | int is_write; | |
1340 | BlockDriverAIOCB *aiocb; | |
abe73c32 | 1341 | } VectorTranslationAIOCB; |
3b69e4b9 | 1342 | |
abe73c32 | 1343 | static void bdrv_aio_cancel_vector(BlockDriverAIOCB *_acb) |
a95ad7bc | 1344 | { |
abe73c32 AL |
1345 | VectorTranslationAIOCB *acb |
1346 | = container_of(_acb, VectorTranslationAIOCB, common); | |
a95ad7bc | 1347 | |
abe73c32 | 1348 | bdrv_aio_cancel(acb->aiocb); |
a95ad7bc AL |
1349 | } |
1350 | ||
3b69e4b9 AL |
1351 | static void bdrv_aio_rw_vector_cb(void *opaque, int ret) |
1352 | { | |
abe73c32 | 1353 | VectorTranslationAIOCB *s = (VectorTranslationAIOCB *)opaque; |
3b69e4b9 AL |
1354 | |
1355 | if (!s->is_write) { | |
249aa745 | 1356 | qemu_iovec_from_buffer(s->iov, s->bounce, s->iov->size); |
3b69e4b9 | 1357 | } |
d905dba4 | 1358 | qemu_vfree(s->bounce); |
abe73c32 AL |
1359 | s->common.cb(s->common.opaque, ret); |
1360 | qemu_aio_release(s); | |
3b69e4b9 AL |
1361 | } |
1362 | ||
1363 | static BlockDriverAIOCB *bdrv_aio_rw_vector(BlockDriverState *bs, | |
1364 | int64_t sector_num, | |
1365 | QEMUIOVector *iov, | |
1366 | int nb_sectors, | |
1367 | BlockDriverCompletionFunc *cb, | |
1368 | void *opaque, | |
1369 | int is_write) | |
1370 | ||
1371 | { | |
abe73c32 AL |
1372 | VectorTranslationAIOCB *s = qemu_aio_get_pool(&vectored_aio_pool, bs, |
1373 | cb, opaque); | |
3b69e4b9 | 1374 | |
3b69e4b9 AL |
1375 | s->iov = iov; |
1376 | s->bounce = qemu_memalign(512, nb_sectors * 512); | |
1377 | s->is_write = is_write; | |
1378 | if (is_write) { | |
1379 | qemu_iovec_to_buffer(s->iov, s->bounce); | |
1380 | s->aiocb = bdrv_aio_write(bs, sector_num, s->bounce, nb_sectors, | |
1381 | bdrv_aio_rw_vector_cb, s); | |
1382 | } else { | |
1383 | s->aiocb = bdrv_aio_read(bs, sector_num, s->bounce, nb_sectors, | |
1384 | bdrv_aio_rw_vector_cb, s); | |
1385 | } | |
662524f5 AL |
1386 | if (!s->aiocb) { |
1387 | qemu_vfree(s->bounce); | |
1388 | qemu_aio_release(s); | |
1389 | return NULL; | |
1390 | } | |
abe73c32 | 1391 | return &s->common; |
3b69e4b9 AL |
1392 | } |
1393 | ||
1394 | BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num, | |
1395 | QEMUIOVector *iov, int nb_sectors, | |
1396 | BlockDriverCompletionFunc *cb, void *opaque) | |
1397 | { | |
71d0770c AL |
1398 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
1399 | return NULL; | |
1400 | ||
3b69e4b9 AL |
1401 | return bdrv_aio_rw_vector(bs, sector_num, iov, nb_sectors, |
1402 | cb, opaque, 0); | |
1403 | } | |
1404 | ||
1405 | BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num, | |
1406 | QEMUIOVector *iov, int nb_sectors, | |
1407 | BlockDriverCompletionFunc *cb, void *opaque) | |
1408 | { | |
71d0770c AL |
1409 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
1410 | return NULL; | |
1411 | ||
3b69e4b9 AL |
1412 | return bdrv_aio_rw_vector(bs, sector_num, iov, nb_sectors, |
1413 | cb, opaque, 1); | |
1414 | } | |
1415 | ||
ce1a14dc PB |
1416 | BlockDriverAIOCB *bdrv_aio_read(BlockDriverState *bs, int64_t sector_num, |
1417 | uint8_t *buf, int nb_sectors, | |
1418 | BlockDriverCompletionFunc *cb, void *opaque) | |
83f64091 FB |
1419 | { |
1420 | BlockDriver *drv = bs->drv; | |
a36e69dd | 1421 | BlockDriverAIOCB *ret; |
83f64091 | 1422 | |
19cb3738 | 1423 | if (!drv) |
ce1a14dc | 1424 | return NULL; |
71d0770c AL |
1425 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
1426 | return NULL; | |
3b46e624 | 1427 | |
a36e69dd TS |
1428 | ret = drv->bdrv_aio_read(bs, sector_num, buf, nb_sectors, cb, opaque); |
1429 | ||
1430 | if (ret) { | |
1431 | /* Update stats even though technically transfer has not happened. */ | |
1432 | bs->rd_bytes += (unsigned) nb_sectors * SECTOR_SIZE; | |
1433 | bs->rd_ops ++; | |
1434 | } | |
1435 | ||
1436 | return ret; | |
ea2384d3 FB |
1437 | } |
1438 | ||
ce1a14dc PB |
1439 | BlockDriverAIOCB *bdrv_aio_write(BlockDriverState *bs, int64_t sector_num, |
1440 | const uint8_t *buf, int nb_sectors, | |
1441 | BlockDriverCompletionFunc *cb, void *opaque) | |
ea2384d3 | 1442 | { |
83f64091 | 1443 | BlockDriver *drv = bs->drv; |
a36e69dd | 1444 | BlockDriverAIOCB *ret; |
ea2384d3 | 1445 | |
19cb3738 | 1446 | if (!drv) |
ce1a14dc | 1447 | return NULL; |
83f64091 | 1448 | if (bs->read_only) |
ce1a14dc | 1449 | return NULL; |
71d0770c AL |
1450 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
1451 | return NULL; | |
83f64091 | 1452 | |
a36e69dd TS |
1453 | ret = drv->bdrv_aio_write(bs, sector_num, buf, nb_sectors, cb, opaque); |
1454 | ||
1455 | if (ret) { | |
1456 | /* Update stats even though technically transfer has not happened. */ | |
1457 | bs->wr_bytes += (unsigned) nb_sectors * SECTOR_SIZE; | |
1458 | bs->wr_ops ++; | |
1459 | } | |
1460 | ||
1461 | return ret; | |
83f64091 FB |
1462 | } |
1463 | ||
1464 | void bdrv_aio_cancel(BlockDriverAIOCB *acb) | |
83f64091 | 1465 | { |
3d2d1e39 | 1466 | acb->pool->cancel(acb); |
83f64091 FB |
1467 | } |
1468 | ||
ce1a14dc | 1469 | |
83f64091 FB |
1470 | /**************************************************************/ |
1471 | /* async block device emulation */ | |
1472 | ||
ce1a14dc | 1473 | static void bdrv_aio_bh_cb(void *opaque) |
83f64091 | 1474 | { |
ce1a14dc PB |
1475 | BlockDriverAIOCBSync *acb = opaque; |
1476 | acb->common.cb(acb->common.opaque, acb->ret); | |
1477 | qemu_aio_release(acb); | |
83f64091 | 1478 | } |
beac80cd | 1479 | |
ce1a14dc PB |
1480 | static BlockDriverAIOCB *bdrv_aio_read_em(BlockDriverState *bs, |
1481 | int64_t sector_num, uint8_t *buf, int nb_sectors, | |
1482 | BlockDriverCompletionFunc *cb, void *opaque) | |
83f64091 | 1483 | { |
ce1a14dc | 1484 | BlockDriverAIOCBSync *acb; |
83f64091 | 1485 | int ret; |
ce1a14dc PB |
1486 | |
1487 | acb = qemu_aio_get(bs, cb, opaque); | |
1488 | if (!acb->bh) | |
1489 | acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); | |
1490 | ret = bdrv_read(bs, sector_num, buf, nb_sectors); | |
1491 | acb->ret = ret; | |
1492 | qemu_bh_schedule(acb->bh); | |
1493 | return &acb->common; | |
beac80cd FB |
1494 | } |
1495 | ||
ce1a14dc PB |
1496 | static BlockDriverAIOCB *bdrv_aio_write_em(BlockDriverState *bs, |
1497 | int64_t sector_num, const uint8_t *buf, int nb_sectors, | |
1498 | BlockDriverCompletionFunc *cb, void *opaque) | |
beac80cd | 1499 | { |
ce1a14dc | 1500 | BlockDriverAIOCBSync *acb; |
83f64091 | 1501 | int ret; |
83f64091 | 1502 | |
ce1a14dc PB |
1503 | acb = qemu_aio_get(bs, cb, opaque); |
1504 | if (!acb->bh) | |
1505 | acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); | |
1506 | ret = bdrv_write(bs, sector_num, buf, nb_sectors); | |
1507 | acb->ret = ret; | |
1508 | qemu_bh_schedule(acb->bh); | |
1509 | return &acb->common; | |
beac80cd | 1510 | } |
beac80cd | 1511 | |
ce1a14dc | 1512 | static void bdrv_aio_cancel_em(BlockDriverAIOCB *blockacb) |
ea2384d3 | 1513 | { |
ce1a14dc PB |
1514 | BlockDriverAIOCBSync *acb = (BlockDriverAIOCBSync *)blockacb; |
1515 | qemu_bh_cancel(acb->bh); | |
1516 | qemu_aio_release(acb); | |
83f64091 | 1517 | } |
ea2384d3 | 1518 | |
83f64091 FB |
1519 | /**************************************************************/ |
1520 | /* sync block device emulation */ | |
ea2384d3 | 1521 | |
83f64091 FB |
1522 | static void bdrv_rw_em_cb(void *opaque, int ret) |
1523 | { | |
1524 | *(int *)opaque = ret; | |
ea2384d3 FB |
1525 | } |
1526 | ||
83f64091 FB |
1527 | #define NOT_DONE 0x7fffffff |
1528 | ||
5fafdf24 | 1529 | static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
83f64091 | 1530 | uint8_t *buf, int nb_sectors) |
7a6cba61 | 1531 | { |
ce1a14dc PB |
1532 | int async_ret; |
1533 | BlockDriverAIOCB *acb; | |
83f64091 | 1534 | |
83f64091 | 1535 | async_ret = NOT_DONE; |
5fafdf24 | 1536 | acb = bdrv_aio_read(bs, sector_num, buf, nb_sectors, |
83f64091 | 1537 | bdrv_rw_em_cb, &async_ret); |
baf35cb9 | 1538 | if (acb == NULL) |
ce1a14dc | 1539 | return -1; |
baf35cb9 | 1540 | |
83f64091 FB |
1541 | while (async_ret == NOT_DONE) { |
1542 | qemu_aio_wait(); | |
1543 | } | |
baf35cb9 | 1544 | |
83f64091 | 1545 | return async_ret; |
7a6cba61 PB |
1546 | } |
1547 | ||
83f64091 FB |
1548 | static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, |
1549 | const uint8_t *buf, int nb_sectors) | |
1550 | { | |
ce1a14dc PB |
1551 | int async_ret; |
1552 | BlockDriverAIOCB *acb; | |
83f64091 | 1553 | |
83f64091 | 1554 | async_ret = NOT_DONE; |
5fafdf24 | 1555 | acb = bdrv_aio_write(bs, sector_num, buf, nb_sectors, |
83f64091 | 1556 | bdrv_rw_em_cb, &async_ret); |
baf35cb9 | 1557 | if (acb == NULL) |
ce1a14dc | 1558 | return -1; |
83f64091 FB |
1559 | while (async_ret == NOT_DONE) { |
1560 | qemu_aio_wait(); | |
1561 | } | |
83f64091 FB |
1562 | return async_ret; |
1563 | } | |
ea2384d3 FB |
1564 | |
1565 | void bdrv_init(void) | |
1566 | { | |
abe73c32 | 1567 | aio_pool_init(&vectored_aio_pool, sizeof(VectorTranslationAIOCB), |
a95ad7bc AL |
1568 | bdrv_aio_cancel_vector); |
1569 | ||
ea2384d3 | 1570 | bdrv_register(&bdrv_raw); |
19cb3738 | 1571 | bdrv_register(&bdrv_host_device); |
ea2384d3 FB |
1572 | #ifndef _WIN32 |
1573 | bdrv_register(&bdrv_cow); | |
1574 | #endif | |
1575 | bdrv_register(&bdrv_qcow); | |
1576 | bdrv_register(&bdrv_vmdk); | |
3c56521b | 1577 | bdrv_register(&bdrv_cloop); |
585d0ed9 | 1578 | bdrv_register(&bdrv_dmg); |
a8753c34 | 1579 | bdrv_register(&bdrv_bochs); |
6a0f9e82 | 1580 | bdrv_register(&bdrv_vpc); |
712e7874 | 1581 | bdrv_register(&bdrv_vvfat); |
faea38e7 | 1582 | bdrv_register(&bdrv_qcow2); |
6ada7453 | 1583 | bdrv_register(&bdrv_parallels); |
75818250 | 1584 | bdrv_register(&bdrv_nbd); |
ea2384d3 | 1585 | } |
ce1a14dc | 1586 | |
3d2d1e39 AL |
1587 | void aio_pool_init(AIOPool *pool, int aiocb_size, |
1588 | void (*cancel)(BlockDriverAIOCB *acb)) | |
1589 | { | |
1590 | pool->aiocb_size = aiocb_size; | |
1591 | pool->cancel = cancel; | |
1592 | pool->free_aiocb = NULL; | |
1593 | } | |
1594 | ||
1595 | void *qemu_aio_get_pool(AIOPool *pool, BlockDriverState *bs, | |
1596 | BlockDriverCompletionFunc *cb, void *opaque) | |
ce1a14dc | 1597 | { |
ce1a14dc PB |
1598 | BlockDriverAIOCB *acb; |
1599 | ||
3d2d1e39 AL |
1600 | if (pool->free_aiocb) { |
1601 | acb = pool->free_aiocb; | |
1602 | pool->free_aiocb = acb->next; | |
ce1a14dc | 1603 | } else { |
3d2d1e39 AL |
1604 | acb = qemu_mallocz(pool->aiocb_size); |
1605 | acb->pool = pool; | |
ce1a14dc PB |
1606 | } |
1607 | acb->bs = bs; | |
1608 | acb->cb = cb; | |
1609 | acb->opaque = opaque; | |
1610 | return acb; | |
1611 | } | |
1612 | ||
3d2d1e39 AL |
1613 | void *qemu_aio_get(BlockDriverState *bs, BlockDriverCompletionFunc *cb, |
1614 | void *opaque) | |
1615 | { | |
1616 | return qemu_aio_get_pool(&bs->drv->aio_pool, bs, cb, opaque); | |
1617 | } | |
1618 | ||
ce1a14dc PB |
1619 | void qemu_aio_release(void *p) |
1620 | { | |
3d2d1e39 AL |
1621 | BlockDriverAIOCB *acb = (BlockDriverAIOCB *)p; |
1622 | AIOPool *pool = acb->pool; | |
1623 | acb->next = pool->free_aiocb; | |
1624 | pool->free_aiocb = acb; | |
ce1a14dc | 1625 | } |
19cb3738 FB |
1626 | |
1627 | /**************************************************************/ | |
1628 | /* removable device support */ | |
1629 | ||
1630 | /** | |
1631 | * Return TRUE if the media is present | |
1632 | */ | |
1633 | int bdrv_is_inserted(BlockDriverState *bs) | |
1634 | { | |
1635 | BlockDriver *drv = bs->drv; | |
1636 | int ret; | |
1637 | if (!drv) | |
1638 | return 0; | |
1639 | if (!drv->bdrv_is_inserted) | |
1640 | return 1; | |
1641 | ret = drv->bdrv_is_inserted(bs); | |
1642 | return ret; | |
1643 | } | |
1644 | ||
1645 | /** | |
1646 | * Return TRUE if the media changed since the last call to this | |
5fafdf24 | 1647 | * function. It is currently only used for floppy disks |
19cb3738 FB |
1648 | */ |
1649 | int bdrv_media_changed(BlockDriverState *bs) | |
1650 | { | |
1651 | BlockDriver *drv = bs->drv; | |
1652 | int ret; | |
1653 | ||
1654 | if (!drv || !drv->bdrv_media_changed) | |
1655 | ret = -ENOTSUP; | |
1656 | else | |
1657 | ret = drv->bdrv_media_changed(bs); | |
1658 | if (ret == -ENOTSUP) | |
1659 | ret = bs->media_changed; | |
1660 | bs->media_changed = 0; | |
1661 | return ret; | |
1662 | } | |
1663 | ||
1664 | /** | |
1665 | * If eject_flag is TRUE, eject the media. Otherwise, close the tray | |
1666 | */ | |
1667 | void bdrv_eject(BlockDriverState *bs, int eject_flag) | |
1668 | { | |
1669 | BlockDriver *drv = bs->drv; | |
1670 | int ret; | |
1671 | ||
1672 | if (!drv || !drv->bdrv_eject) { | |
1673 | ret = -ENOTSUP; | |
1674 | } else { | |
1675 | ret = drv->bdrv_eject(bs, eject_flag); | |
1676 | } | |
1677 | if (ret == -ENOTSUP) { | |
1678 | if (eject_flag) | |
1679 | bdrv_close(bs); | |
1680 | } | |
1681 | } | |
1682 | ||
1683 | int bdrv_is_locked(BlockDriverState *bs) | |
1684 | { | |
1685 | return bs->locked; | |
1686 | } | |
1687 | ||
1688 | /** | |
1689 | * Lock or unlock the media (if it is locked, the user won't be able | |
1690 | * to eject it manually). | |
1691 | */ | |
1692 | void bdrv_set_locked(BlockDriverState *bs, int locked) | |
1693 | { | |
1694 | BlockDriver *drv = bs->drv; | |
1695 | ||
1696 | bs->locked = locked; | |
1697 | if (drv && drv->bdrv_set_locked) { | |
1698 | drv->bdrv_set_locked(bs, locked); | |
1699 | } | |
1700 | } | |
985a03b0 TS |
1701 | |
1702 | /* needed for generic scsi interface */ | |
1703 | ||
1704 | int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) | |
1705 | { | |
1706 | BlockDriver *drv = bs->drv; | |
1707 | ||
1708 | if (drv && drv->bdrv_ioctl) | |
1709 | return drv->bdrv_ioctl(bs, req, buf); | |
1710 | return -ENOTSUP; | |
1711 | } |