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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 | */ | |
faf07963 | 24 | #include "qemu-common.h" |
87ecb68b | 25 | #include "console.h" |
ea2384d3 | 26 | #include "block_int.h" |
fc01f7e7 | 27 | |
7674e7bf FB |
28 | #ifdef _BSD |
29 | #include <sys/types.h> | |
30 | #include <sys/stat.h> | |
31 | #include <sys/ioctl.h> | |
32 | #include <sys/queue.h> | |
33 | #include <sys/disk.h> | |
34 | #endif | |
35 | ||
83f64091 FB |
36 | #define SECTOR_BITS 9 |
37 | #define SECTOR_SIZE (1 << SECTOR_BITS) | |
38 | ||
90765429 FB |
39 | typedef struct BlockDriverAIOCBSync { |
40 | BlockDriverAIOCB common; | |
41 | QEMUBH *bh; | |
42 | int ret; | |
43 | } BlockDriverAIOCBSync; | |
44 | ||
ce1a14dc PB |
45 | static BlockDriverAIOCB *bdrv_aio_read_em(BlockDriverState *bs, |
46 | int64_t sector_num, uint8_t *buf, int nb_sectors, | |
47 | BlockDriverCompletionFunc *cb, void *opaque); | |
48 | static BlockDriverAIOCB *bdrv_aio_write_em(BlockDriverState *bs, | |
49 | int64_t sector_num, const uint8_t *buf, int nb_sectors, | |
50 | BlockDriverCompletionFunc *cb, void *opaque); | |
83f64091 | 51 | static void bdrv_aio_cancel_em(BlockDriverAIOCB *acb); |
5fafdf24 | 52 | static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
83f64091 FB |
53 | uint8_t *buf, int nb_sectors); |
54 | static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, | |
55 | const uint8_t *buf, int nb_sectors); | |
ec530c81 | 56 | |
ea2384d3 FB |
57 | static BlockDriver *first_drv; |
58 | ||
83f64091 | 59 | int path_is_absolute(const char *path) |
3b0d4f61 | 60 | { |
83f64091 | 61 | const char *p; |
21664424 FB |
62 | #ifdef _WIN32 |
63 | /* specific case for names like: "\\.\d:" */ | |
64 | if (*path == '/' || *path == '\\') | |
65 | return 1; | |
66 | #endif | |
83f64091 FB |
67 | p = strchr(path, ':'); |
68 | if (p) | |
69 | p++; | |
70 | else | |
71 | p = path; | |
3b9f94e1 FB |
72 | #ifdef _WIN32 |
73 | return (*p == '/' || *p == '\\'); | |
74 | #else | |
75 | return (*p == '/'); | |
76 | #endif | |
3b0d4f61 FB |
77 | } |
78 | ||
83f64091 FB |
79 | /* if filename is absolute, just copy it to dest. Otherwise, build a |
80 | path to it by considering it is relative to base_path. URL are | |
81 | supported. */ | |
82 | void path_combine(char *dest, int dest_size, | |
83 | const char *base_path, | |
84 | const char *filename) | |
3b0d4f61 | 85 | { |
83f64091 FB |
86 | const char *p, *p1; |
87 | int len; | |
88 | ||
89 | if (dest_size <= 0) | |
90 | return; | |
91 | if (path_is_absolute(filename)) { | |
92 | pstrcpy(dest, dest_size, filename); | |
93 | } else { | |
94 | p = strchr(base_path, ':'); | |
95 | if (p) | |
96 | p++; | |
97 | else | |
98 | p = base_path; | |
3b9f94e1 FB |
99 | p1 = strrchr(base_path, '/'); |
100 | #ifdef _WIN32 | |
101 | { | |
102 | const char *p2; | |
103 | p2 = strrchr(base_path, '\\'); | |
104 | if (!p1 || p2 > p1) | |
105 | p1 = p2; | |
106 | } | |
107 | #endif | |
83f64091 FB |
108 | if (p1) |
109 | p1++; | |
110 | else | |
111 | p1 = base_path; | |
112 | if (p1 > p) | |
113 | p = p1; | |
114 | len = p - base_path; | |
115 | if (len > dest_size - 1) | |
116 | len = dest_size - 1; | |
117 | memcpy(dest, base_path, len); | |
118 | dest[len] = '\0'; | |
119 | pstrcat(dest, dest_size, filename); | |
3b0d4f61 | 120 | } |
3b0d4f61 FB |
121 | } |
122 | ||
3b0d4f61 | 123 | |
9596ebb7 | 124 | static void bdrv_register(BlockDriver *bdrv) |
ea2384d3 | 125 | { |
ce1a14dc | 126 | if (!bdrv->bdrv_aio_read) { |
83f64091 | 127 | /* add AIO emulation layer */ |
83f64091 FB |
128 | bdrv->bdrv_aio_read = bdrv_aio_read_em; |
129 | bdrv->bdrv_aio_write = bdrv_aio_write_em; | |
130 | bdrv->bdrv_aio_cancel = bdrv_aio_cancel_em; | |
90765429 | 131 | bdrv->aiocb_size = sizeof(BlockDriverAIOCBSync); |
83f64091 FB |
132 | } else if (!bdrv->bdrv_read && !bdrv->bdrv_pread) { |
133 | /* add synchronous IO emulation layer */ | |
134 | bdrv->bdrv_read = bdrv_read_em; | |
135 | bdrv->bdrv_write = bdrv_write_em; | |
136 | } | |
ea2384d3 FB |
137 | bdrv->next = first_drv; |
138 | first_drv = bdrv; | |
139 | } | |
b338082b FB |
140 | |
141 | /* create a new block device (by default it is empty) */ | |
142 | BlockDriverState *bdrv_new(const char *device_name) | |
143 | { | |
144 | BlockDriverState **pbs, *bs; | |
145 | ||
146 | bs = qemu_mallocz(sizeof(BlockDriverState)); | |
147 | if(!bs) | |
148 | return NULL; | |
149 | pstrcpy(bs->device_name, sizeof(bs->device_name), device_name); | |
ea2384d3 FB |
150 | if (device_name[0] != '\0') { |
151 | /* insert at the end */ | |
152 | pbs = &bdrv_first; | |
153 | while (*pbs != NULL) | |
154 | pbs = &(*pbs)->next; | |
155 | *pbs = bs; | |
156 | } | |
b338082b FB |
157 | return bs; |
158 | } | |
159 | ||
ea2384d3 FB |
160 | BlockDriver *bdrv_find_format(const char *format_name) |
161 | { | |
162 | BlockDriver *drv1; | |
163 | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { | |
164 | if (!strcmp(drv1->format_name, format_name)) | |
165 | return drv1; | |
166 | } | |
167 | return NULL; | |
168 | } | |
169 | ||
5fafdf24 | 170 | int bdrv_create(BlockDriver *drv, |
ea2384d3 FB |
171 | const char *filename, int64_t size_in_sectors, |
172 | const char *backing_file, int flags) | |
173 | { | |
174 | if (!drv->bdrv_create) | |
175 | return -ENOTSUP; | |
176 | return drv->bdrv_create(filename, size_in_sectors, backing_file, flags); | |
177 | } | |
178 | ||
d5249393 | 179 | #ifdef _WIN32 |
95389c86 | 180 | void get_tmp_filename(char *filename, int size) |
d5249393 | 181 | { |
3b9f94e1 | 182 | char temp_dir[MAX_PATH]; |
3b46e624 | 183 | |
3b9f94e1 FB |
184 | GetTempPath(MAX_PATH, temp_dir); |
185 | GetTempFileName(temp_dir, "qem", 0, filename); | |
d5249393 FB |
186 | } |
187 | #else | |
95389c86 | 188 | void get_tmp_filename(char *filename, int size) |
fc01f7e7 | 189 | { |
67b915a5 | 190 | int fd; |
7ccfb2eb | 191 | const char *tmpdir; |
d5249393 | 192 | /* XXX: race condition possible */ |
0badc1ee AJ |
193 | tmpdir = getenv("TMPDIR"); |
194 | if (!tmpdir) | |
195 | tmpdir = "/tmp"; | |
196 | snprintf(filename, size, "%s/vl.XXXXXX", tmpdir); | |
ea2384d3 FB |
197 | fd = mkstemp(filename); |
198 | close(fd); | |
199 | } | |
d5249393 | 200 | #endif |
fc01f7e7 | 201 | |
19cb3738 | 202 | #ifdef _WIN32 |
f45512fe FB |
203 | static int is_windows_drive_prefix(const char *filename) |
204 | { | |
205 | return (((filename[0] >= 'a' && filename[0] <= 'z') || | |
206 | (filename[0] >= 'A' && filename[0] <= 'Z')) && | |
207 | filename[1] == ':'); | |
208 | } | |
3b46e624 | 209 | |
19cb3738 FB |
210 | static int is_windows_drive(const char *filename) |
211 | { | |
5fafdf24 | 212 | if (is_windows_drive_prefix(filename) && |
f45512fe | 213 | filename[2] == '\0') |
19cb3738 FB |
214 | return 1; |
215 | if (strstart(filename, "\\\\.\\", NULL) || | |
216 | strstart(filename, "//./", NULL)) | |
217 | return 1; | |
218 | return 0; | |
219 | } | |
220 | #endif | |
221 | ||
83f64091 FB |
222 | static BlockDriver *find_protocol(const char *filename) |
223 | { | |
224 | BlockDriver *drv1; | |
225 | char protocol[128]; | |
226 | int len; | |
227 | const char *p; | |
19cb3738 FB |
228 | |
229 | #ifdef _WIN32 | |
f45512fe FB |
230 | if (is_windows_drive(filename) || |
231 | is_windows_drive_prefix(filename)) | |
19cb3738 FB |
232 | return &bdrv_raw; |
233 | #endif | |
83f64091 FB |
234 | p = strchr(filename, ':'); |
235 | if (!p) | |
236 | return &bdrv_raw; | |
237 | len = p - filename; | |
238 | if (len > sizeof(protocol) - 1) | |
239 | len = sizeof(protocol) - 1; | |
83f64091 FB |
240 | memcpy(protocol, filename, len); |
241 | protocol[len] = '\0'; | |
242 | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { | |
5fafdf24 | 243 | if (drv1->protocol_name && |
83f64091 FB |
244 | !strcmp(drv1->protocol_name, protocol)) |
245 | return drv1; | |
246 | } | |
247 | return NULL; | |
248 | } | |
249 | ||
7674e7bf FB |
250 | /* XXX: force raw format if block or character device ? It would |
251 | simplify the BSD case */ | |
ea2384d3 FB |
252 | static BlockDriver *find_image_format(const char *filename) |
253 | { | |
83f64091 | 254 | int ret, score, score_max; |
ea2384d3 | 255 | BlockDriver *drv1, *drv; |
83f64091 FB |
256 | uint8_t buf[2048]; |
257 | BlockDriverState *bs; | |
3b46e624 | 258 | |
19cb3738 FB |
259 | /* detect host devices. By convention, /dev/cdrom[N] is always |
260 | recognized as a host CDROM */ | |
261 | if (strstart(filename, "/dev/cdrom", NULL)) | |
262 | return &bdrv_host_device; | |
263 | #ifdef _WIN32 | |
264 | if (is_windows_drive(filename)) | |
265 | return &bdrv_host_device; | |
266 | #else | |
267 | { | |
268 | struct stat st; | |
5fafdf24 | 269 | if (stat(filename, &st) >= 0 && |
19cb3738 FB |
270 | (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) { |
271 | return &bdrv_host_device; | |
272 | } | |
273 | } | |
274 | #endif | |
3b46e624 | 275 | |
83f64091 | 276 | drv = find_protocol(filename); |
19cb3738 | 277 | /* no need to test disk image formats for vvfat */ |
83f64091 FB |
278 | if (drv == &bdrv_vvfat) |
279 | return drv; | |
19cb3738 | 280 | |
83f64091 FB |
281 | ret = bdrv_file_open(&bs, filename, BDRV_O_RDONLY); |
282 | if (ret < 0) | |
283 | return NULL; | |
284 | ret = bdrv_pread(bs, 0, buf, sizeof(buf)); | |
285 | bdrv_delete(bs); | |
286 | if (ret < 0) { | |
287 | return NULL; | |
288 | } | |
289 | ||
ea2384d3 FB |
290 | score_max = 0; |
291 | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { | |
83f64091 FB |
292 | if (drv1->bdrv_probe) { |
293 | score = drv1->bdrv_probe(buf, ret, filename); | |
294 | if (score > score_max) { | |
295 | score_max = score; | |
296 | drv = drv1; | |
297 | } | |
0849bf08 | 298 | } |
fc01f7e7 | 299 | } |
ea2384d3 FB |
300 | return drv; |
301 | } | |
302 | ||
83f64091 | 303 | int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags) |
ea2384d3 | 304 | { |
83f64091 FB |
305 | BlockDriverState *bs; |
306 | int ret; | |
307 | ||
308 | bs = bdrv_new(""); | |
309 | if (!bs) | |
310 | return -ENOMEM; | |
311 | ret = bdrv_open2(bs, filename, flags | BDRV_O_FILE, NULL); | |
312 | if (ret < 0) { | |
313 | bdrv_delete(bs); | |
314 | return ret; | |
3b0d4f61 | 315 | } |
83f64091 FB |
316 | *pbs = bs; |
317 | return 0; | |
318 | } | |
319 | ||
320 | int bdrv_open(BlockDriverState *bs, const char *filename, int flags) | |
321 | { | |
322 | return bdrv_open2(bs, filename, flags, NULL); | |
ea2384d3 FB |
323 | } |
324 | ||
83f64091 | 325 | int bdrv_open2(BlockDriverState *bs, const char *filename, int flags, |
ea2384d3 FB |
326 | BlockDriver *drv) |
327 | { | |
83f64091 | 328 | int ret, open_flags; |
eb5c851f TS |
329 | char tmp_filename[PATH_MAX]; |
330 | char backing_filename[PATH_MAX]; | |
3b46e624 | 331 | |
ea2384d3 FB |
332 | bs->read_only = 0; |
333 | bs->is_temporary = 0; | |
334 | bs->encrypted = 0; | |
712e7874 | 335 | |
83f64091 | 336 | if (flags & BDRV_O_SNAPSHOT) { |
ea2384d3 FB |
337 | BlockDriverState *bs1; |
338 | int64_t total_size; | |
7c96d46e | 339 | int is_protocol = 0; |
3b46e624 | 340 | |
ea2384d3 FB |
341 | /* if snapshot, we create a temporary backing file and open it |
342 | instead of opening 'filename' directly */ | |
33e3963e | 343 | |
ea2384d3 FB |
344 | /* if there is a backing file, use it */ |
345 | bs1 = bdrv_new(""); | |
346 | if (!bs1) { | |
83f64091 | 347 | return -ENOMEM; |
ea2384d3 FB |
348 | } |
349 | if (bdrv_open(bs1, filename, 0) < 0) { | |
350 | bdrv_delete(bs1); | |
351 | return -1; | |
352 | } | |
83f64091 | 353 | total_size = bdrv_getlength(bs1) >> SECTOR_BITS; |
7c96d46e AL |
354 | |
355 | if (bs1->drv && bs1->drv->protocol_name) | |
356 | is_protocol = 1; | |
357 | ||
ea2384d3 | 358 | bdrv_delete(bs1); |
3b46e624 | 359 | |
ea2384d3 | 360 | get_tmp_filename(tmp_filename, sizeof(tmp_filename)); |
7c96d46e AL |
361 | |
362 | /* Real path is meaningless for protocols */ | |
363 | if (is_protocol) | |
364 | snprintf(backing_filename, sizeof(backing_filename), | |
365 | "%s", filename); | |
366 | else | |
367 | realpath(filename, backing_filename); | |
368 | ||
5fafdf24 | 369 | if (bdrv_create(&bdrv_qcow2, tmp_filename, |
a817d936 | 370 | total_size, backing_filename, 0) < 0) { |
ea2384d3 FB |
371 | return -1; |
372 | } | |
373 | filename = tmp_filename; | |
374 | bs->is_temporary = 1; | |
375 | } | |
712e7874 | 376 | |
ea2384d3 | 377 | pstrcpy(bs->filename, sizeof(bs->filename), filename); |
83f64091 FB |
378 | if (flags & BDRV_O_FILE) { |
379 | drv = find_protocol(filename); | |
ea2384d3 | 380 | if (!drv) |
83f64091 FB |
381 | return -ENOENT; |
382 | } else { | |
383 | if (!drv) { | |
384 | drv = find_image_format(filename); | |
385 | if (!drv) | |
386 | return -1; | |
387 | } | |
ea2384d3 FB |
388 | } |
389 | bs->drv = drv; | |
390 | bs->opaque = qemu_mallocz(drv->instance_size); | |
391 | if (bs->opaque == NULL && drv->instance_size > 0) | |
392 | return -1; | |
83f64091 FB |
393 | /* Note: for compatibility, we open disk image files as RDWR, and |
394 | RDONLY as fallback */ | |
395 | if (!(flags & BDRV_O_FILE)) | |
33f00271 | 396 | open_flags = BDRV_O_RDWR | (flags & BDRV_O_DIRECT); |
83f64091 FB |
397 | else |
398 | open_flags = flags & ~(BDRV_O_FILE | BDRV_O_SNAPSHOT); | |
399 | ret = drv->bdrv_open(bs, filename, open_flags); | |
400 | if (ret == -EACCES && !(flags & BDRV_O_FILE)) { | |
401 | ret = drv->bdrv_open(bs, filename, BDRV_O_RDONLY); | |
402 | bs->read_only = 1; | |
403 | } | |
ea2384d3 FB |
404 | if (ret < 0) { |
405 | qemu_free(bs->opaque); | |
6b21b973 FB |
406 | bs->opaque = NULL; |
407 | bs->drv = NULL; | |
83f64091 | 408 | return ret; |
33e3963e | 409 | } |
d15a771d FB |
410 | if (drv->bdrv_getlength) { |
411 | bs->total_sectors = bdrv_getlength(bs) >> SECTOR_BITS; | |
412 | } | |
67b915a5 | 413 | #ifndef _WIN32 |
ea2384d3 FB |
414 | if (bs->is_temporary) { |
415 | unlink(filename); | |
416 | } | |
417 | #endif | |
83f64091 | 418 | if (bs->backing_file[0] != '\0') { |
ea2384d3 FB |
419 | /* if there is a backing file, use it */ |
420 | bs->backing_hd = bdrv_new(""); | |
421 | if (!bs->backing_hd) { | |
422 | fail: | |
423 | bdrv_close(bs); | |
6b21b973 | 424 | return -ENOMEM; |
33e3963e | 425 | } |
83f64091 FB |
426 | path_combine(backing_filename, sizeof(backing_filename), |
427 | filename, bs->backing_file); | |
428 | if (bdrv_open(bs->backing_hd, backing_filename, 0) < 0) | |
33e3963e | 429 | goto fail; |
33e3963e FB |
430 | } |
431 | ||
b338082b | 432 | /* call the change callback */ |
19cb3738 | 433 | bs->media_changed = 1; |
b338082b FB |
434 | if (bs->change_cb) |
435 | bs->change_cb(bs->change_opaque); | |
436 | ||
437 | return 0; | |
fc01f7e7 FB |
438 | } |
439 | ||
440 | void bdrv_close(BlockDriverState *bs) | |
441 | { | |
19cb3738 | 442 | if (bs->drv) { |
ea2384d3 FB |
443 | if (bs->backing_hd) |
444 | bdrv_delete(bs->backing_hd); | |
445 | bs->drv->bdrv_close(bs); | |
446 | qemu_free(bs->opaque); | |
447 | #ifdef _WIN32 | |
448 | if (bs->is_temporary) { | |
449 | unlink(bs->filename); | |
450 | } | |
67b915a5 | 451 | #endif |
ea2384d3 FB |
452 | bs->opaque = NULL; |
453 | bs->drv = NULL; | |
b338082b FB |
454 | |
455 | /* call the change callback */ | |
19cb3738 | 456 | bs->media_changed = 1; |
b338082b FB |
457 | if (bs->change_cb) |
458 | bs->change_cb(bs->change_opaque); | |
459 | } | |
460 | } | |
461 | ||
462 | void bdrv_delete(BlockDriverState *bs) | |
463 | { | |
34c6f050 AJ |
464 | BlockDriverState **pbs; |
465 | ||
466 | pbs = &bdrv_first; | |
467 | while (*pbs != bs && *pbs != NULL) | |
468 | pbs = &(*pbs)->next; | |
469 | if (*pbs == bs) | |
470 | *pbs = bs->next; | |
471 | ||
b338082b FB |
472 | bdrv_close(bs); |
473 | qemu_free(bs); | |
fc01f7e7 FB |
474 | } |
475 | ||
33e3963e FB |
476 | /* commit COW file into the raw image */ |
477 | int bdrv_commit(BlockDriverState *bs) | |
478 | { | |
19cb3738 | 479 | BlockDriver *drv = bs->drv; |
83f64091 | 480 | int64_t i, total_sectors; |
ea2384d3 FB |
481 | int n, j; |
482 | unsigned char sector[512]; | |
33e3963e | 483 | |
19cb3738 FB |
484 | if (!drv) |
485 | return -ENOMEDIUM; | |
33e3963e FB |
486 | |
487 | if (bs->read_only) { | |
ea2384d3 | 488 | return -EACCES; |
33e3963e FB |
489 | } |
490 | ||
ea2384d3 FB |
491 | if (!bs->backing_hd) { |
492 | return -ENOTSUP; | |
493 | } | |
33e3963e | 494 | |
83f64091 FB |
495 | total_sectors = bdrv_getlength(bs) >> SECTOR_BITS; |
496 | for (i = 0; i < total_sectors;) { | |
19cb3738 | 497 | if (drv->bdrv_is_allocated(bs, i, 65536, &n)) { |
ea2384d3 FB |
498 | for(j = 0; j < n; j++) { |
499 | if (bdrv_read(bs, i, sector, 1) != 0) { | |
500 | return -EIO; | |
501 | } | |
502 | ||
503 | if (bdrv_write(bs->backing_hd, i, sector, 1) != 0) { | |
504 | return -EIO; | |
505 | } | |
506 | i++; | |
33e3963e | 507 | } |
ea2384d3 FB |
508 | } else { |
509 | i += n; | |
510 | } | |
33e3963e | 511 | } |
95389c86 | 512 | |
19cb3738 FB |
513 | if (drv->bdrv_make_empty) |
514 | return drv->bdrv_make_empty(bs); | |
95389c86 | 515 | |
33e3963e FB |
516 | return 0; |
517 | } | |
518 | ||
19cb3738 | 519 | /* return < 0 if error. See bdrv_write() for the return codes */ |
5fafdf24 | 520 | int bdrv_read(BlockDriverState *bs, int64_t sector_num, |
fc01f7e7 FB |
521 | uint8_t *buf, int nb_sectors) |
522 | { | |
ea2384d3 FB |
523 | BlockDriver *drv = bs->drv; |
524 | ||
19cb3738 FB |
525 | if (!drv) |
526 | return -ENOMEDIUM; | |
b338082b | 527 | |
83f64091 | 528 | if (sector_num == 0 && bs->boot_sector_enabled && nb_sectors > 0) { |
cf98951b | 529 | memcpy(buf, bs->boot_sector_data, 512); |
83f64091 FB |
530 | sector_num++; |
531 | nb_sectors--; | |
532 | buf += 512; | |
533 | if (nb_sectors == 0) | |
534 | return 0; | |
535 | } | |
536 | if (drv->bdrv_pread) { | |
537 | int ret, len; | |
538 | len = nb_sectors * 512; | |
539 | ret = drv->bdrv_pread(bs, sector_num * 512, buf, len); | |
540 | if (ret < 0) | |
541 | return ret; | |
542 | else if (ret != len) | |
19cb3738 | 543 | return -EINVAL; |
a36e69dd TS |
544 | else { |
545 | bs->rd_bytes += (unsigned) len; | |
546 | bs->rd_ops ++; | |
83f64091 | 547 | return 0; |
a36e69dd | 548 | } |
83f64091 FB |
549 | } else { |
550 | return drv->bdrv_read(bs, sector_num, buf, nb_sectors); | |
33e3963e | 551 | } |
fc01f7e7 FB |
552 | } |
553 | ||
5fafdf24 | 554 | /* Return < 0 if error. Important errors are: |
19cb3738 FB |
555 | -EIO generic I/O error (may happen for all errors) |
556 | -ENOMEDIUM No media inserted. | |
557 | -EINVAL Invalid sector number or nb_sectors | |
558 | -EACCES Trying to write a read-only device | |
559 | */ | |
5fafdf24 | 560 | int bdrv_write(BlockDriverState *bs, int64_t sector_num, |
fc01f7e7 FB |
561 | const uint8_t *buf, int nb_sectors) |
562 | { | |
83f64091 | 563 | BlockDriver *drv = bs->drv; |
19cb3738 FB |
564 | if (!bs->drv) |
565 | return -ENOMEDIUM; | |
0849bf08 | 566 | if (bs->read_only) |
19cb3738 | 567 | return -EACCES; |
79639d42 | 568 | if (sector_num == 0 && bs->boot_sector_enabled && nb_sectors > 0) { |
3b46e624 | 569 | memcpy(bs->boot_sector_data, buf, 512); |
79639d42 | 570 | } |
83f64091 FB |
571 | if (drv->bdrv_pwrite) { |
572 | int ret, len; | |
573 | len = nb_sectors * 512; | |
574 | ret = drv->bdrv_pwrite(bs, sector_num * 512, buf, len); | |
575 | if (ret < 0) | |
576 | return ret; | |
577 | else if (ret != len) | |
578 | return -EIO; | |
a36e69dd TS |
579 | else { |
580 | bs->wr_bytes += (unsigned) len; | |
581 | bs->wr_ops ++; | |
83f64091 | 582 | return 0; |
a36e69dd | 583 | } |
83f64091 FB |
584 | } else { |
585 | return drv->bdrv_write(bs, sector_num, buf, nb_sectors); | |
586 | } | |
587 | } | |
588 | ||
5fafdf24 | 589 | static int bdrv_pread_em(BlockDriverState *bs, int64_t offset, |
faea38e7 | 590 | uint8_t *buf, int count1) |
83f64091 | 591 | { |
83f64091 FB |
592 | uint8_t tmp_buf[SECTOR_SIZE]; |
593 | int len, nb_sectors, count; | |
594 | int64_t sector_num; | |
595 | ||
596 | count = count1; | |
597 | /* first read to align to sector start */ | |
598 | len = (SECTOR_SIZE - offset) & (SECTOR_SIZE - 1); | |
599 | if (len > count) | |
600 | len = count; | |
601 | sector_num = offset >> SECTOR_BITS; | |
602 | if (len > 0) { | |
603 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) | |
604 | return -EIO; | |
605 | memcpy(buf, tmp_buf + (offset & (SECTOR_SIZE - 1)), len); | |
606 | count -= len; | |
607 | if (count == 0) | |
608 | return count1; | |
609 | sector_num++; | |
610 | buf += len; | |
611 | } | |
612 | ||
613 | /* read the sectors "in place" */ | |
614 | nb_sectors = count >> SECTOR_BITS; | |
615 | if (nb_sectors > 0) { | |
616 | if (bdrv_read(bs, sector_num, buf, nb_sectors) < 0) | |
617 | return -EIO; | |
618 | sector_num += nb_sectors; | |
619 | len = nb_sectors << SECTOR_BITS; | |
620 | buf += len; | |
621 | count -= len; | |
622 | } | |
623 | ||
624 | /* add data from the last sector */ | |
625 | if (count > 0) { | |
626 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) | |
627 | return -EIO; | |
628 | memcpy(buf, tmp_buf, count); | |
629 | } | |
630 | return count1; | |
631 | } | |
632 | ||
5fafdf24 | 633 | static int bdrv_pwrite_em(BlockDriverState *bs, int64_t offset, |
faea38e7 | 634 | const uint8_t *buf, int count1) |
83f64091 | 635 | { |
83f64091 FB |
636 | uint8_t tmp_buf[SECTOR_SIZE]; |
637 | int len, nb_sectors, count; | |
638 | int64_t sector_num; | |
639 | ||
640 | count = count1; | |
641 | /* first write to align to sector start */ | |
642 | len = (SECTOR_SIZE - offset) & (SECTOR_SIZE - 1); | |
643 | if (len > count) | |
644 | len = count; | |
645 | sector_num = offset >> SECTOR_BITS; | |
646 | if (len > 0) { | |
647 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) | |
648 | return -EIO; | |
649 | memcpy(tmp_buf + (offset & (SECTOR_SIZE - 1)), buf, len); | |
650 | if (bdrv_write(bs, sector_num, tmp_buf, 1) < 0) | |
651 | return -EIO; | |
652 | count -= len; | |
653 | if (count == 0) | |
654 | return count1; | |
655 | sector_num++; | |
656 | buf += len; | |
657 | } | |
658 | ||
659 | /* write the sectors "in place" */ | |
660 | nb_sectors = count >> SECTOR_BITS; | |
661 | if (nb_sectors > 0) { | |
662 | if (bdrv_write(bs, sector_num, buf, nb_sectors) < 0) | |
663 | return -EIO; | |
664 | sector_num += nb_sectors; | |
665 | len = nb_sectors << SECTOR_BITS; | |
666 | buf += len; | |
667 | count -= len; | |
668 | } | |
669 | ||
670 | /* add data from the last sector */ | |
671 | if (count > 0) { | |
672 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) | |
673 | return -EIO; | |
674 | memcpy(tmp_buf, buf, count); | |
675 | if (bdrv_write(bs, sector_num, tmp_buf, 1) < 0) | |
676 | return -EIO; | |
677 | } | |
678 | return count1; | |
679 | } | |
83f64091 FB |
680 | |
681 | /** | |
5fafdf24 | 682 | * Read with byte offsets (needed only for file protocols) |
83f64091 | 683 | */ |
5fafdf24 | 684 | int bdrv_pread(BlockDriverState *bs, int64_t offset, |
83f64091 FB |
685 | void *buf1, int count1) |
686 | { | |
687 | BlockDriver *drv = bs->drv; | |
688 | ||
689 | if (!drv) | |
19cb3738 | 690 | return -ENOMEDIUM; |
83f64091 | 691 | if (!drv->bdrv_pread) |
faea38e7 | 692 | return bdrv_pread_em(bs, offset, buf1, count1); |
83f64091 FB |
693 | return drv->bdrv_pread(bs, offset, buf1, count1); |
694 | } | |
695 | ||
5fafdf24 TS |
696 | /** |
697 | * Write with byte offsets (needed only for file protocols) | |
83f64091 | 698 | */ |
5fafdf24 | 699 | int bdrv_pwrite(BlockDriverState *bs, int64_t offset, |
83f64091 FB |
700 | const void *buf1, int count1) |
701 | { | |
702 | BlockDriver *drv = bs->drv; | |
703 | ||
704 | if (!drv) | |
19cb3738 | 705 | return -ENOMEDIUM; |
83f64091 | 706 | if (!drv->bdrv_pwrite) |
faea38e7 | 707 | return bdrv_pwrite_em(bs, offset, buf1, count1); |
83f64091 FB |
708 | return drv->bdrv_pwrite(bs, offset, buf1, count1); |
709 | } | |
710 | ||
711 | /** | |
712 | * Truncate file to 'offset' bytes (needed only for file protocols) | |
713 | */ | |
714 | int bdrv_truncate(BlockDriverState *bs, int64_t offset) | |
715 | { | |
716 | BlockDriver *drv = bs->drv; | |
717 | if (!drv) | |
19cb3738 | 718 | return -ENOMEDIUM; |
83f64091 FB |
719 | if (!drv->bdrv_truncate) |
720 | return -ENOTSUP; | |
721 | return drv->bdrv_truncate(bs, offset); | |
722 | } | |
723 | ||
724 | /** | |
725 | * Length of a file in bytes. Return < 0 if error or unknown. | |
726 | */ | |
727 | int64_t bdrv_getlength(BlockDriverState *bs) | |
728 | { | |
729 | BlockDriver *drv = bs->drv; | |
730 | if (!drv) | |
19cb3738 | 731 | return -ENOMEDIUM; |
83f64091 FB |
732 | if (!drv->bdrv_getlength) { |
733 | /* legacy mode */ | |
734 | return bs->total_sectors * SECTOR_SIZE; | |
735 | } | |
736 | return drv->bdrv_getlength(bs); | |
fc01f7e7 FB |
737 | } |
738 | ||
19cb3738 | 739 | /* return 0 as number of sectors if no device present or error */ |
96b8f136 | 740 | void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr) |
fc01f7e7 | 741 | { |
19cb3738 FB |
742 | int64_t length; |
743 | length = bdrv_getlength(bs); | |
744 | if (length < 0) | |
745 | length = 0; | |
746 | else | |
747 | length = length >> SECTOR_BITS; | |
748 | *nb_sectors_ptr = length; | |
fc01f7e7 | 749 | } |
cf98951b FB |
750 | |
751 | /* force a given boot sector. */ | |
752 | void bdrv_set_boot_sector(BlockDriverState *bs, const uint8_t *data, int size) | |
753 | { | |
754 | bs->boot_sector_enabled = 1; | |
755 | if (size > 512) | |
756 | size = 512; | |
757 | memcpy(bs->boot_sector_data, data, size); | |
758 | memset(bs->boot_sector_data + size, 0, 512 - size); | |
759 | } | |
b338082b | 760 | |
5fafdf24 | 761 | void bdrv_set_geometry_hint(BlockDriverState *bs, |
b338082b FB |
762 | int cyls, int heads, int secs) |
763 | { | |
764 | bs->cyls = cyls; | |
765 | bs->heads = heads; | |
766 | bs->secs = secs; | |
767 | } | |
768 | ||
769 | void bdrv_set_type_hint(BlockDriverState *bs, int type) | |
770 | { | |
771 | bs->type = type; | |
772 | bs->removable = ((type == BDRV_TYPE_CDROM || | |
773 | type == BDRV_TYPE_FLOPPY)); | |
774 | } | |
775 | ||
46d4767d FB |
776 | void bdrv_set_translation_hint(BlockDriverState *bs, int translation) |
777 | { | |
778 | bs->translation = translation; | |
779 | } | |
780 | ||
5fafdf24 | 781 | void bdrv_get_geometry_hint(BlockDriverState *bs, |
b338082b FB |
782 | int *pcyls, int *pheads, int *psecs) |
783 | { | |
784 | *pcyls = bs->cyls; | |
785 | *pheads = bs->heads; | |
786 | *psecs = bs->secs; | |
787 | } | |
788 | ||
789 | int bdrv_get_type_hint(BlockDriverState *bs) | |
790 | { | |
791 | return bs->type; | |
792 | } | |
793 | ||
46d4767d FB |
794 | int bdrv_get_translation_hint(BlockDriverState *bs) |
795 | { | |
796 | return bs->translation; | |
797 | } | |
798 | ||
b338082b FB |
799 | int bdrv_is_removable(BlockDriverState *bs) |
800 | { | |
801 | return bs->removable; | |
802 | } | |
803 | ||
804 | int bdrv_is_read_only(BlockDriverState *bs) | |
805 | { | |
806 | return bs->read_only; | |
807 | } | |
808 | ||
985a03b0 TS |
809 | int bdrv_is_sg(BlockDriverState *bs) |
810 | { | |
811 | return bs->sg; | |
812 | } | |
813 | ||
19cb3738 | 814 | /* XXX: no longer used */ |
5fafdf24 | 815 | void bdrv_set_change_cb(BlockDriverState *bs, |
b338082b FB |
816 | void (*change_cb)(void *opaque), void *opaque) |
817 | { | |
818 | bs->change_cb = change_cb; | |
819 | bs->change_opaque = opaque; | |
820 | } | |
821 | ||
ea2384d3 FB |
822 | int bdrv_is_encrypted(BlockDriverState *bs) |
823 | { | |
824 | if (bs->backing_hd && bs->backing_hd->encrypted) | |
825 | return 1; | |
826 | return bs->encrypted; | |
827 | } | |
828 | ||
829 | int bdrv_set_key(BlockDriverState *bs, const char *key) | |
830 | { | |
831 | int ret; | |
832 | if (bs->backing_hd && bs->backing_hd->encrypted) { | |
833 | ret = bdrv_set_key(bs->backing_hd, key); | |
834 | if (ret < 0) | |
835 | return ret; | |
836 | if (!bs->encrypted) | |
837 | return 0; | |
838 | } | |
839 | if (!bs->encrypted || !bs->drv || !bs->drv->bdrv_set_key) | |
840 | return -1; | |
841 | return bs->drv->bdrv_set_key(bs, key); | |
842 | } | |
843 | ||
844 | void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size) | |
845 | { | |
19cb3738 | 846 | if (!bs->drv) { |
ea2384d3 FB |
847 | buf[0] = '\0'; |
848 | } else { | |
849 | pstrcpy(buf, buf_size, bs->drv->format_name); | |
850 | } | |
851 | } | |
852 | ||
5fafdf24 | 853 | void bdrv_iterate_format(void (*it)(void *opaque, const char *name), |
ea2384d3 FB |
854 | void *opaque) |
855 | { | |
856 | BlockDriver *drv; | |
857 | ||
858 | for (drv = first_drv; drv != NULL; drv = drv->next) { | |
859 | it(opaque, drv->format_name); | |
860 | } | |
861 | } | |
862 | ||
b338082b FB |
863 | BlockDriverState *bdrv_find(const char *name) |
864 | { | |
865 | BlockDriverState *bs; | |
866 | ||
867 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { | |
868 | if (!strcmp(name, bs->device_name)) | |
869 | return bs; | |
870 | } | |
871 | return NULL; | |
872 | } | |
873 | ||
81d0912d FB |
874 | void bdrv_iterate(void (*it)(void *opaque, const char *name), void *opaque) |
875 | { | |
876 | BlockDriverState *bs; | |
877 | ||
878 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { | |
879 | it(opaque, bs->device_name); | |
880 | } | |
881 | } | |
882 | ||
ea2384d3 FB |
883 | const char *bdrv_get_device_name(BlockDriverState *bs) |
884 | { | |
885 | return bs->device_name; | |
886 | } | |
887 | ||
7a6cba61 PB |
888 | void bdrv_flush(BlockDriverState *bs) |
889 | { | |
890 | if (bs->drv->bdrv_flush) | |
891 | bs->drv->bdrv_flush(bs); | |
892 | if (bs->backing_hd) | |
893 | bdrv_flush(bs->backing_hd); | |
894 | } | |
895 | ||
f58c7b35 TS |
896 | /* |
897 | * Returns true iff the specified sector is present in the disk image. Drivers | |
898 | * not implementing the functionality are assumed to not support backing files, | |
899 | * hence all their sectors are reported as allocated. | |
900 | * | |
901 | * 'pnum' is set to the number of sectors (including and immediately following | |
902 | * the specified sector) that are known to be in the same | |
903 | * allocated/unallocated state. | |
904 | * | |
905 | * 'nb_sectors' is the max value 'pnum' should be set to. | |
906 | */ | |
907 | int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, | |
908 | int *pnum) | |
909 | { | |
910 | int64_t n; | |
911 | if (!bs->drv->bdrv_is_allocated) { | |
912 | if (sector_num >= bs->total_sectors) { | |
913 | *pnum = 0; | |
914 | return 0; | |
915 | } | |
916 | n = bs->total_sectors - sector_num; | |
917 | *pnum = (n < nb_sectors) ? (n) : (nb_sectors); | |
918 | return 1; | |
919 | } | |
920 | return bs->drv->bdrv_is_allocated(bs, sector_num, nb_sectors, pnum); | |
921 | } | |
922 | ||
b338082b FB |
923 | void bdrv_info(void) |
924 | { | |
925 | BlockDriverState *bs; | |
926 | ||
927 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { | |
928 | term_printf("%s:", bs->device_name); | |
929 | term_printf(" type="); | |
930 | switch(bs->type) { | |
931 | case BDRV_TYPE_HD: | |
932 | term_printf("hd"); | |
933 | break; | |
934 | case BDRV_TYPE_CDROM: | |
935 | term_printf("cdrom"); | |
936 | break; | |
937 | case BDRV_TYPE_FLOPPY: | |
938 | term_printf("floppy"); | |
939 | break; | |
940 | } | |
941 | term_printf(" removable=%d", bs->removable); | |
942 | if (bs->removable) { | |
943 | term_printf(" locked=%d", bs->locked); | |
944 | } | |
19cb3738 | 945 | if (bs->drv) { |
fef30743 TS |
946 | term_printf(" file="); |
947 | term_print_filename(bs->filename); | |
948 | if (bs->backing_file[0] != '\0') { | |
949 | term_printf(" backing_file="); | |
950 | term_print_filename(bs->backing_file); | |
951 | } | |
b338082b | 952 | term_printf(" ro=%d", bs->read_only); |
ea2384d3 FB |
953 | term_printf(" drv=%s", bs->drv->format_name); |
954 | if (bs->encrypted) | |
955 | term_printf(" encrypted"); | |
b338082b FB |
956 | } else { |
957 | term_printf(" [not inserted]"); | |
958 | } | |
959 | term_printf("\n"); | |
960 | } | |
961 | } | |
a36e69dd TS |
962 | |
963 | /* The "info blockstats" command. */ | |
964 | void bdrv_info_stats (void) | |
965 | { | |
966 | BlockDriverState *bs; | |
967 | ||
968 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { | |
969 | term_printf ("%s:" | |
970 | " rd_bytes=%" PRIu64 | |
971 | " wr_bytes=%" PRIu64 | |
972 | " rd_operations=%" PRIu64 | |
973 | " wr_operations=%" PRIu64 | |
974 | "\n", | |
975 | bs->device_name, | |
976 | bs->rd_bytes, bs->wr_bytes, | |
977 | bs->rd_ops, bs->wr_ops); | |
978 | } | |
979 | } | |
ea2384d3 | 980 | |
5fafdf24 | 981 | void bdrv_get_backing_filename(BlockDriverState *bs, |
83f64091 FB |
982 | char *filename, int filename_size) |
983 | { | |
984 | if (!bs->backing_hd) { | |
985 | pstrcpy(filename, filename_size, ""); | |
986 | } else { | |
987 | pstrcpy(filename, filename_size, bs->backing_file); | |
988 | } | |
989 | } | |
990 | ||
5fafdf24 | 991 | int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num, |
faea38e7 FB |
992 | const uint8_t *buf, int nb_sectors) |
993 | { | |
994 | BlockDriver *drv = bs->drv; | |
995 | if (!drv) | |
19cb3738 | 996 | return -ENOMEDIUM; |
faea38e7 FB |
997 | if (!drv->bdrv_write_compressed) |
998 | return -ENOTSUP; | |
999 | return drv->bdrv_write_compressed(bs, sector_num, buf, nb_sectors); | |
1000 | } | |
3b46e624 | 1001 | |
faea38e7 FB |
1002 | int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) |
1003 | { | |
1004 | BlockDriver *drv = bs->drv; | |
1005 | if (!drv) | |
19cb3738 | 1006 | return -ENOMEDIUM; |
faea38e7 FB |
1007 | if (!drv->bdrv_get_info) |
1008 | return -ENOTSUP; | |
1009 | memset(bdi, 0, sizeof(*bdi)); | |
1010 | return drv->bdrv_get_info(bs, bdi); | |
1011 | } | |
1012 | ||
1013 | /**************************************************************/ | |
1014 | /* handling of snapshots */ | |
1015 | ||
5fafdf24 | 1016 | int bdrv_snapshot_create(BlockDriverState *bs, |
faea38e7 FB |
1017 | QEMUSnapshotInfo *sn_info) |
1018 | { | |
1019 | BlockDriver *drv = bs->drv; | |
1020 | if (!drv) | |
19cb3738 | 1021 | return -ENOMEDIUM; |
faea38e7 FB |
1022 | if (!drv->bdrv_snapshot_create) |
1023 | return -ENOTSUP; | |
1024 | return drv->bdrv_snapshot_create(bs, sn_info); | |
1025 | } | |
1026 | ||
5fafdf24 | 1027 | int bdrv_snapshot_goto(BlockDriverState *bs, |
faea38e7 FB |
1028 | const char *snapshot_id) |
1029 | { | |
1030 | BlockDriver *drv = bs->drv; | |
1031 | if (!drv) | |
19cb3738 | 1032 | return -ENOMEDIUM; |
faea38e7 FB |
1033 | if (!drv->bdrv_snapshot_goto) |
1034 | return -ENOTSUP; | |
1035 | return drv->bdrv_snapshot_goto(bs, snapshot_id); | |
1036 | } | |
1037 | ||
1038 | int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id) | |
1039 | { | |
1040 | BlockDriver *drv = bs->drv; | |
1041 | if (!drv) | |
19cb3738 | 1042 | return -ENOMEDIUM; |
faea38e7 FB |
1043 | if (!drv->bdrv_snapshot_delete) |
1044 | return -ENOTSUP; | |
1045 | return drv->bdrv_snapshot_delete(bs, snapshot_id); | |
1046 | } | |
1047 | ||
5fafdf24 | 1048 | int bdrv_snapshot_list(BlockDriverState *bs, |
faea38e7 FB |
1049 | QEMUSnapshotInfo **psn_info) |
1050 | { | |
1051 | BlockDriver *drv = bs->drv; | |
1052 | if (!drv) | |
19cb3738 | 1053 | return -ENOMEDIUM; |
faea38e7 FB |
1054 | if (!drv->bdrv_snapshot_list) |
1055 | return -ENOTSUP; | |
1056 | return drv->bdrv_snapshot_list(bs, psn_info); | |
1057 | } | |
1058 | ||
1059 | #define NB_SUFFIXES 4 | |
1060 | ||
1061 | char *get_human_readable_size(char *buf, int buf_size, int64_t size) | |
1062 | { | |
1063 | static const char suffixes[NB_SUFFIXES] = "KMGT"; | |
1064 | int64_t base; | |
1065 | int i; | |
1066 | ||
1067 | if (size <= 999) { | |
1068 | snprintf(buf, buf_size, "%" PRId64, size); | |
1069 | } else { | |
1070 | base = 1024; | |
1071 | for(i = 0; i < NB_SUFFIXES; i++) { | |
1072 | if (size < (10 * base)) { | |
5fafdf24 | 1073 | snprintf(buf, buf_size, "%0.1f%c", |
faea38e7 FB |
1074 | (double)size / base, |
1075 | suffixes[i]); | |
1076 | break; | |
1077 | } else if (size < (1000 * base) || i == (NB_SUFFIXES - 1)) { | |
5fafdf24 | 1078 | snprintf(buf, buf_size, "%" PRId64 "%c", |
faea38e7 FB |
1079 | ((size + (base >> 1)) / base), |
1080 | suffixes[i]); | |
1081 | break; | |
1082 | } | |
1083 | base = base * 1024; | |
1084 | } | |
1085 | } | |
1086 | return buf; | |
1087 | } | |
1088 | ||
1089 | char *bdrv_snapshot_dump(char *buf, int buf_size, QEMUSnapshotInfo *sn) | |
1090 | { | |
1091 | char buf1[128], date_buf[128], clock_buf[128]; | |
3b9f94e1 FB |
1092 | #ifdef _WIN32 |
1093 | struct tm *ptm; | |
1094 | #else | |
faea38e7 | 1095 | struct tm tm; |
3b9f94e1 | 1096 | #endif |
faea38e7 FB |
1097 | time_t ti; |
1098 | int64_t secs; | |
1099 | ||
1100 | if (!sn) { | |
5fafdf24 TS |
1101 | snprintf(buf, buf_size, |
1102 | "%-10s%-20s%7s%20s%15s", | |
faea38e7 FB |
1103 | "ID", "TAG", "VM SIZE", "DATE", "VM CLOCK"); |
1104 | } else { | |
1105 | ti = sn->date_sec; | |
3b9f94e1 FB |
1106 | #ifdef _WIN32 |
1107 | ptm = localtime(&ti); | |
1108 | strftime(date_buf, sizeof(date_buf), | |
1109 | "%Y-%m-%d %H:%M:%S", ptm); | |
1110 | #else | |
faea38e7 FB |
1111 | localtime_r(&ti, &tm); |
1112 | strftime(date_buf, sizeof(date_buf), | |
1113 | "%Y-%m-%d %H:%M:%S", &tm); | |
3b9f94e1 | 1114 | #endif |
faea38e7 FB |
1115 | secs = sn->vm_clock_nsec / 1000000000; |
1116 | snprintf(clock_buf, sizeof(clock_buf), | |
1117 | "%02d:%02d:%02d.%03d", | |
1118 | (int)(secs / 3600), | |
1119 | (int)((secs / 60) % 60), | |
5fafdf24 | 1120 | (int)(secs % 60), |
faea38e7 FB |
1121 | (int)((sn->vm_clock_nsec / 1000000) % 1000)); |
1122 | snprintf(buf, buf_size, | |
5fafdf24 | 1123 | "%-10s%-20s%7s%20s%15s", |
faea38e7 FB |
1124 | sn->id_str, sn->name, |
1125 | get_human_readable_size(buf1, sizeof(buf1), sn->vm_state_size), | |
1126 | date_buf, | |
1127 | clock_buf); | |
1128 | } | |
1129 | return buf; | |
1130 | } | |
1131 | ||
83f64091 | 1132 | |
ea2384d3 | 1133 | /**************************************************************/ |
83f64091 | 1134 | /* async I/Os */ |
ea2384d3 | 1135 | |
ce1a14dc PB |
1136 | BlockDriverAIOCB *bdrv_aio_read(BlockDriverState *bs, int64_t sector_num, |
1137 | uint8_t *buf, int nb_sectors, | |
1138 | BlockDriverCompletionFunc *cb, void *opaque) | |
83f64091 FB |
1139 | { |
1140 | BlockDriver *drv = bs->drv; | |
a36e69dd | 1141 | BlockDriverAIOCB *ret; |
83f64091 | 1142 | |
19cb3738 | 1143 | if (!drv) |
ce1a14dc | 1144 | return NULL; |
3b46e624 | 1145 | |
83f64091 FB |
1146 | /* XXX: we assume that nb_sectors == 0 is suppored by the async read */ |
1147 | if (sector_num == 0 && bs->boot_sector_enabled && nb_sectors > 0) { | |
1148 | memcpy(buf, bs->boot_sector_data, 512); | |
1149 | sector_num++; | |
1150 | nb_sectors--; | |
1151 | buf += 512; | |
1152 | } | |
1153 | ||
a36e69dd TS |
1154 | ret = drv->bdrv_aio_read(bs, sector_num, buf, nb_sectors, cb, opaque); |
1155 | ||
1156 | if (ret) { | |
1157 | /* Update stats even though technically transfer has not happened. */ | |
1158 | bs->rd_bytes += (unsigned) nb_sectors * SECTOR_SIZE; | |
1159 | bs->rd_ops ++; | |
1160 | } | |
1161 | ||
1162 | return ret; | |
ea2384d3 FB |
1163 | } |
1164 | ||
ce1a14dc PB |
1165 | BlockDriverAIOCB *bdrv_aio_write(BlockDriverState *bs, int64_t sector_num, |
1166 | const uint8_t *buf, int nb_sectors, | |
1167 | BlockDriverCompletionFunc *cb, void *opaque) | |
ea2384d3 | 1168 | { |
83f64091 | 1169 | BlockDriver *drv = bs->drv; |
a36e69dd | 1170 | BlockDriverAIOCB *ret; |
ea2384d3 | 1171 | |
19cb3738 | 1172 | if (!drv) |
ce1a14dc | 1173 | return NULL; |
83f64091 | 1174 | if (bs->read_only) |
ce1a14dc | 1175 | return NULL; |
83f64091 | 1176 | if (sector_num == 0 && bs->boot_sector_enabled && nb_sectors > 0) { |
3b46e624 | 1177 | memcpy(bs->boot_sector_data, buf, 512); |
ea2384d3 | 1178 | } |
83f64091 | 1179 | |
a36e69dd TS |
1180 | ret = drv->bdrv_aio_write(bs, sector_num, buf, nb_sectors, cb, opaque); |
1181 | ||
1182 | if (ret) { | |
1183 | /* Update stats even though technically transfer has not happened. */ | |
1184 | bs->wr_bytes += (unsigned) nb_sectors * SECTOR_SIZE; | |
1185 | bs->wr_ops ++; | |
1186 | } | |
1187 | ||
1188 | return ret; | |
83f64091 FB |
1189 | } |
1190 | ||
1191 | void bdrv_aio_cancel(BlockDriverAIOCB *acb) | |
83f64091 | 1192 | { |
ce1a14dc | 1193 | BlockDriver *drv = acb->bs->drv; |
83f64091 | 1194 | |
ce1a14dc | 1195 | drv->bdrv_aio_cancel(acb); |
83f64091 FB |
1196 | } |
1197 | ||
ce1a14dc | 1198 | |
83f64091 FB |
1199 | /**************************************************************/ |
1200 | /* async block device emulation */ | |
1201 | ||
ce1a14dc | 1202 | static void bdrv_aio_bh_cb(void *opaque) |
83f64091 | 1203 | { |
ce1a14dc PB |
1204 | BlockDriverAIOCBSync *acb = opaque; |
1205 | acb->common.cb(acb->common.opaque, acb->ret); | |
1206 | qemu_aio_release(acb); | |
83f64091 | 1207 | } |
beac80cd | 1208 | |
ce1a14dc PB |
1209 | static BlockDriverAIOCB *bdrv_aio_read_em(BlockDriverState *bs, |
1210 | int64_t sector_num, uint8_t *buf, int nb_sectors, | |
1211 | BlockDriverCompletionFunc *cb, void *opaque) | |
83f64091 | 1212 | { |
ce1a14dc | 1213 | BlockDriverAIOCBSync *acb; |
83f64091 | 1214 | int ret; |
ce1a14dc PB |
1215 | |
1216 | acb = qemu_aio_get(bs, cb, opaque); | |
1217 | if (!acb->bh) | |
1218 | acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); | |
1219 | ret = bdrv_read(bs, sector_num, buf, nb_sectors); | |
1220 | acb->ret = ret; | |
1221 | qemu_bh_schedule(acb->bh); | |
1222 | return &acb->common; | |
beac80cd FB |
1223 | } |
1224 | ||
ce1a14dc PB |
1225 | static BlockDriverAIOCB *bdrv_aio_write_em(BlockDriverState *bs, |
1226 | int64_t sector_num, const uint8_t *buf, int nb_sectors, | |
1227 | BlockDriverCompletionFunc *cb, void *opaque) | |
beac80cd | 1228 | { |
ce1a14dc | 1229 | BlockDriverAIOCBSync *acb; |
83f64091 | 1230 | int ret; |
83f64091 | 1231 | |
ce1a14dc PB |
1232 | acb = qemu_aio_get(bs, cb, opaque); |
1233 | if (!acb->bh) | |
1234 | acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); | |
1235 | ret = bdrv_write(bs, sector_num, buf, nb_sectors); | |
1236 | acb->ret = ret; | |
1237 | qemu_bh_schedule(acb->bh); | |
1238 | return &acb->common; | |
beac80cd | 1239 | } |
beac80cd | 1240 | |
ce1a14dc | 1241 | static void bdrv_aio_cancel_em(BlockDriverAIOCB *blockacb) |
ea2384d3 | 1242 | { |
ce1a14dc PB |
1243 | BlockDriverAIOCBSync *acb = (BlockDriverAIOCBSync *)blockacb; |
1244 | qemu_bh_cancel(acb->bh); | |
1245 | qemu_aio_release(acb); | |
83f64091 | 1246 | } |
ea2384d3 | 1247 | |
83f64091 FB |
1248 | /**************************************************************/ |
1249 | /* sync block device emulation */ | |
ea2384d3 | 1250 | |
83f64091 FB |
1251 | static void bdrv_rw_em_cb(void *opaque, int ret) |
1252 | { | |
1253 | *(int *)opaque = ret; | |
ea2384d3 FB |
1254 | } |
1255 | ||
83f64091 FB |
1256 | #define NOT_DONE 0x7fffffff |
1257 | ||
5fafdf24 | 1258 | static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
83f64091 | 1259 | uint8_t *buf, int nb_sectors) |
7a6cba61 | 1260 | { |
ce1a14dc PB |
1261 | int async_ret; |
1262 | BlockDriverAIOCB *acb; | |
83f64091 | 1263 | |
83f64091 | 1264 | async_ret = NOT_DONE; |
5fafdf24 | 1265 | acb = bdrv_aio_read(bs, sector_num, buf, nb_sectors, |
83f64091 | 1266 | bdrv_rw_em_cb, &async_ret); |
baf35cb9 | 1267 | if (acb == NULL) |
ce1a14dc | 1268 | return -1; |
baf35cb9 | 1269 | |
83f64091 FB |
1270 | while (async_ret == NOT_DONE) { |
1271 | qemu_aio_wait(); | |
1272 | } | |
baf35cb9 | 1273 | |
83f64091 | 1274 | return async_ret; |
7a6cba61 PB |
1275 | } |
1276 | ||
83f64091 FB |
1277 | static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, |
1278 | const uint8_t *buf, int nb_sectors) | |
1279 | { | |
ce1a14dc PB |
1280 | int async_ret; |
1281 | BlockDriverAIOCB *acb; | |
83f64091 | 1282 | |
83f64091 | 1283 | async_ret = NOT_DONE; |
5fafdf24 | 1284 | acb = bdrv_aio_write(bs, sector_num, buf, nb_sectors, |
83f64091 | 1285 | bdrv_rw_em_cb, &async_ret); |
baf35cb9 | 1286 | if (acb == NULL) |
ce1a14dc | 1287 | return -1; |
83f64091 FB |
1288 | while (async_ret == NOT_DONE) { |
1289 | qemu_aio_wait(); | |
1290 | } | |
83f64091 FB |
1291 | return async_ret; |
1292 | } | |
ea2384d3 FB |
1293 | |
1294 | void bdrv_init(void) | |
1295 | { | |
1296 | bdrv_register(&bdrv_raw); | |
19cb3738 | 1297 | bdrv_register(&bdrv_host_device); |
ea2384d3 FB |
1298 | #ifndef _WIN32 |
1299 | bdrv_register(&bdrv_cow); | |
1300 | #endif | |
1301 | bdrv_register(&bdrv_qcow); | |
1302 | bdrv_register(&bdrv_vmdk); | |
3c56521b | 1303 | bdrv_register(&bdrv_cloop); |
585d0ed9 | 1304 | bdrv_register(&bdrv_dmg); |
a8753c34 | 1305 | bdrv_register(&bdrv_bochs); |
6a0f9e82 | 1306 | bdrv_register(&bdrv_vpc); |
712e7874 | 1307 | bdrv_register(&bdrv_vvfat); |
faea38e7 | 1308 | bdrv_register(&bdrv_qcow2); |
6ada7453 | 1309 | bdrv_register(&bdrv_parallels); |
75818250 | 1310 | bdrv_register(&bdrv_nbd); |
a3392f9b AL |
1311 | |
1312 | qemu_aio_init(); | |
ea2384d3 | 1313 | } |
ce1a14dc PB |
1314 | |
1315 | void *qemu_aio_get(BlockDriverState *bs, BlockDriverCompletionFunc *cb, | |
1316 | void *opaque) | |
1317 | { | |
1318 | BlockDriver *drv; | |
1319 | BlockDriverAIOCB *acb; | |
1320 | ||
1321 | drv = bs->drv; | |
1322 | if (drv->free_aiocb) { | |
1323 | acb = drv->free_aiocb; | |
1324 | drv->free_aiocb = acb->next; | |
1325 | } else { | |
1326 | acb = qemu_mallocz(drv->aiocb_size); | |
1327 | if (!acb) | |
1328 | return NULL; | |
1329 | } | |
1330 | acb->bs = bs; | |
1331 | acb->cb = cb; | |
1332 | acb->opaque = opaque; | |
1333 | return acb; | |
1334 | } | |
1335 | ||
1336 | void qemu_aio_release(void *p) | |
1337 | { | |
1338 | BlockDriverAIOCB *acb = p; | |
1339 | BlockDriver *drv = acb->bs->drv; | |
1340 | acb->next = drv->free_aiocb; | |
1341 | drv->free_aiocb = acb; | |
1342 | } | |
19cb3738 FB |
1343 | |
1344 | /**************************************************************/ | |
1345 | /* removable device support */ | |
1346 | ||
1347 | /** | |
1348 | * Return TRUE if the media is present | |
1349 | */ | |
1350 | int bdrv_is_inserted(BlockDriverState *bs) | |
1351 | { | |
1352 | BlockDriver *drv = bs->drv; | |
1353 | int ret; | |
1354 | if (!drv) | |
1355 | return 0; | |
1356 | if (!drv->bdrv_is_inserted) | |
1357 | return 1; | |
1358 | ret = drv->bdrv_is_inserted(bs); | |
1359 | return ret; | |
1360 | } | |
1361 | ||
1362 | /** | |
1363 | * Return TRUE if the media changed since the last call to this | |
5fafdf24 | 1364 | * function. It is currently only used for floppy disks |
19cb3738 FB |
1365 | */ |
1366 | int bdrv_media_changed(BlockDriverState *bs) | |
1367 | { | |
1368 | BlockDriver *drv = bs->drv; | |
1369 | int ret; | |
1370 | ||
1371 | if (!drv || !drv->bdrv_media_changed) | |
1372 | ret = -ENOTSUP; | |
1373 | else | |
1374 | ret = drv->bdrv_media_changed(bs); | |
1375 | if (ret == -ENOTSUP) | |
1376 | ret = bs->media_changed; | |
1377 | bs->media_changed = 0; | |
1378 | return ret; | |
1379 | } | |
1380 | ||
1381 | /** | |
1382 | * If eject_flag is TRUE, eject the media. Otherwise, close the tray | |
1383 | */ | |
1384 | void bdrv_eject(BlockDriverState *bs, int eject_flag) | |
1385 | { | |
1386 | BlockDriver *drv = bs->drv; | |
1387 | int ret; | |
1388 | ||
1389 | if (!drv || !drv->bdrv_eject) { | |
1390 | ret = -ENOTSUP; | |
1391 | } else { | |
1392 | ret = drv->bdrv_eject(bs, eject_flag); | |
1393 | } | |
1394 | if (ret == -ENOTSUP) { | |
1395 | if (eject_flag) | |
1396 | bdrv_close(bs); | |
1397 | } | |
1398 | } | |
1399 | ||
1400 | int bdrv_is_locked(BlockDriverState *bs) | |
1401 | { | |
1402 | return bs->locked; | |
1403 | } | |
1404 | ||
1405 | /** | |
1406 | * Lock or unlock the media (if it is locked, the user won't be able | |
1407 | * to eject it manually). | |
1408 | */ | |
1409 | void bdrv_set_locked(BlockDriverState *bs, int locked) | |
1410 | { | |
1411 | BlockDriver *drv = bs->drv; | |
1412 | ||
1413 | bs->locked = locked; | |
1414 | if (drv && drv->bdrv_set_locked) { | |
1415 | drv->bdrv_set_locked(bs, locked); | |
1416 | } | |
1417 | } | |
985a03b0 TS |
1418 | |
1419 | /* needed for generic scsi interface */ | |
1420 | ||
1421 | int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) | |
1422 | { | |
1423 | BlockDriver *drv = bs->drv; | |
1424 | ||
1425 | if (drv && drv->bdrv_ioctl) | |
1426 | return drv->bdrv_ioctl(bs, req, buf); | |
1427 | return -ENOTSUP; | |
1428 | } |