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Commit | Line | Data |
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fc01f7e7 FB |
1 | /* |
2 | * QEMU System Emulator block driver | |
5fafdf24 | 3 | * |
fc01f7e7 | 4 | * Copyright (c) 2003 Fabrice Bellard |
5fafdf24 | 5 | * |
fc01f7e7 FB |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
22 | * THE SOFTWARE. | |
23 | */ | |
3990d09a | 24 | #include "config-host.h" |
179a2c19 | 25 | #ifdef HOST_BSD |
3990d09a BS |
26 | /* include native header before sys-queue.h */ |
27 | #include <sys/queue.h> | |
28 | #endif | |
29 | ||
faf07963 | 30 | #include "qemu-common.h" |
376253ec | 31 | #include "monitor.h" |
ea2384d3 | 32 | #include "block_int.h" |
5efa9d5a | 33 | #include "module.h" |
fc01f7e7 | 34 | |
179a2c19 | 35 | #ifdef HOST_BSD |
7674e7bf FB |
36 | #include <sys/types.h> |
37 | #include <sys/stat.h> | |
38 | #include <sys/ioctl.h> | |
c5e97233 | 39 | #ifndef __DragonFly__ |
7674e7bf FB |
40 | #include <sys/disk.h> |
41 | #endif | |
c5e97233 | 42 | #endif |
7674e7bf | 43 | |
49dc768d AL |
44 | #ifdef _WIN32 |
45 | #include <windows.h> | |
46 | #endif | |
47 | ||
83f64091 FB |
48 | #define SECTOR_BITS 9 |
49 | #define SECTOR_SIZE (1 << SECTOR_BITS) | |
50 | ||
f141eafe AL |
51 | static BlockDriverAIOCB *bdrv_aio_readv_em(BlockDriverState *bs, |
52 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
c87c0672 | 53 | BlockDriverCompletionFunc *cb, void *opaque); |
f141eafe AL |
54 | static BlockDriverAIOCB *bdrv_aio_writev_em(BlockDriverState *bs, |
55 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
ce1a14dc | 56 | BlockDriverCompletionFunc *cb, void *opaque); |
5fafdf24 | 57 | static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
83f64091 FB |
58 | uint8_t *buf, int nb_sectors); |
59 | static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, | |
60 | const uint8_t *buf, int nb_sectors); | |
ec530c81 | 61 | |
7ee930d0 BS |
62 | BlockDriverState *bdrv_first; |
63 | ||
ea2384d3 FB |
64 | static BlockDriver *first_drv; |
65 | ||
83f64091 | 66 | int path_is_absolute(const char *path) |
3b0d4f61 | 67 | { |
83f64091 | 68 | const char *p; |
21664424 FB |
69 | #ifdef _WIN32 |
70 | /* specific case for names like: "\\.\d:" */ | |
71 | if (*path == '/' || *path == '\\') | |
72 | return 1; | |
73 | #endif | |
83f64091 FB |
74 | p = strchr(path, ':'); |
75 | if (p) | |
76 | p++; | |
77 | else | |
78 | p = path; | |
3b9f94e1 FB |
79 | #ifdef _WIN32 |
80 | return (*p == '/' || *p == '\\'); | |
81 | #else | |
82 | return (*p == '/'); | |
83 | #endif | |
3b0d4f61 FB |
84 | } |
85 | ||
83f64091 FB |
86 | /* if filename is absolute, just copy it to dest. Otherwise, build a |
87 | path to it by considering it is relative to base_path. URL are | |
88 | supported. */ | |
89 | void path_combine(char *dest, int dest_size, | |
90 | const char *base_path, | |
91 | const char *filename) | |
3b0d4f61 | 92 | { |
83f64091 FB |
93 | const char *p, *p1; |
94 | int len; | |
95 | ||
96 | if (dest_size <= 0) | |
97 | return; | |
98 | if (path_is_absolute(filename)) { | |
99 | pstrcpy(dest, dest_size, filename); | |
100 | } else { | |
101 | p = strchr(base_path, ':'); | |
102 | if (p) | |
103 | p++; | |
104 | else | |
105 | p = base_path; | |
3b9f94e1 FB |
106 | p1 = strrchr(base_path, '/'); |
107 | #ifdef _WIN32 | |
108 | { | |
109 | const char *p2; | |
110 | p2 = strrchr(base_path, '\\'); | |
111 | if (!p1 || p2 > p1) | |
112 | p1 = p2; | |
113 | } | |
114 | #endif | |
83f64091 FB |
115 | if (p1) |
116 | p1++; | |
117 | else | |
118 | p1 = base_path; | |
119 | if (p1 > p) | |
120 | p = p1; | |
121 | len = p - base_path; | |
122 | if (len > dest_size - 1) | |
123 | len = dest_size - 1; | |
124 | memcpy(dest, base_path, len); | |
125 | dest[len] = '\0'; | |
126 | pstrcat(dest, dest_size, filename); | |
3b0d4f61 | 127 | } |
3b0d4f61 FB |
128 | } |
129 | ||
5efa9d5a | 130 | void bdrv_register(BlockDriver *bdrv) |
ea2384d3 | 131 | { |
f141eafe | 132 | if (!bdrv->bdrv_aio_readv) { |
83f64091 | 133 | /* add AIO emulation layer */ |
f141eafe AL |
134 | bdrv->bdrv_aio_readv = bdrv_aio_readv_em; |
135 | bdrv->bdrv_aio_writev = bdrv_aio_writev_em; | |
eda578e5 | 136 | } else if (!bdrv->bdrv_read) { |
83f64091 FB |
137 | /* add synchronous IO emulation layer */ |
138 | bdrv->bdrv_read = bdrv_read_em; | |
139 | bdrv->bdrv_write = bdrv_write_em; | |
140 | } | |
ea2384d3 FB |
141 | bdrv->next = first_drv; |
142 | first_drv = bdrv; | |
143 | } | |
b338082b FB |
144 | |
145 | /* create a new block device (by default it is empty) */ | |
146 | BlockDriverState *bdrv_new(const char *device_name) | |
147 | { | |
148 | BlockDriverState **pbs, *bs; | |
149 | ||
150 | bs = qemu_mallocz(sizeof(BlockDriverState)); | |
b338082b | 151 | pstrcpy(bs->device_name, sizeof(bs->device_name), device_name); |
ea2384d3 FB |
152 | if (device_name[0] != '\0') { |
153 | /* insert at the end */ | |
154 | pbs = &bdrv_first; | |
155 | while (*pbs != NULL) | |
156 | pbs = &(*pbs)->next; | |
157 | *pbs = bs; | |
158 | } | |
b338082b FB |
159 | return bs; |
160 | } | |
161 | ||
ea2384d3 FB |
162 | BlockDriver *bdrv_find_format(const char *format_name) |
163 | { | |
164 | BlockDriver *drv1; | |
165 | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { | |
166 | if (!strcmp(drv1->format_name, format_name)) | |
167 | return drv1; | |
168 | } | |
169 | return NULL; | |
170 | } | |
171 | ||
0e7e1989 KW |
172 | int bdrv_create(BlockDriver *drv, const char* filename, |
173 | QEMUOptionParameter *options) | |
ea2384d3 FB |
174 | { |
175 | if (!drv->bdrv_create) | |
176 | return -ENOTSUP; | |
0e7e1989 KW |
177 | |
178 | return drv->bdrv_create(filename, options); | |
ea2384d3 FB |
179 | } |
180 | ||
d5249393 | 181 | #ifdef _WIN32 |
95389c86 | 182 | void get_tmp_filename(char *filename, int size) |
d5249393 | 183 | { |
3b9f94e1 | 184 | char temp_dir[MAX_PATH]; |
3b46e624 | 185 | |
3b9f94e1 FB |
186 | GetTempPath(MAX_PATH, temp_dir); |
187 | GetTempFileName(temp_dir, "qem", 0, filename); | |
d5249393 FB |
188 | } |
189 | #else | |
95389c86 | 190 | void get_tmp_filename(char *filename, int size) |
fc01f7e7 | 191 | { |
67b915a5 | 192 | int fd; |
7ccfb2eb | 193 | const char *tmpdir; |
d5249393 | 194 | /* XXX: race condition possible */ |
0badc1ee AJ |
195 | tmpdir = getenv("TMPDIR"); |
196 | if (!tmpdir) | |
197 | tmpdir = "/tmp"; | |
198 | snprintf(filename, size, "%s/vl.XXXXXX", tmpdir); | |
ea2384d3 FB |
199 | fd = mkstemp(filename); |
200 | close(fd); | |
201 | } | |
d5249393 | 202 | #endif |
fc01f7e7 | 203 | |
19cb3738 | 204 | #ifdef _WIN32 |
f45512fe FB |
205 | static int is_windows_drive_prefix(const char *filename) |
206 | { | |
207 | return (((filename[0] >= 'a' && filename[0] <= 'z') || | |
208 | (filename[0] >= 'A' && filename[0] <= 'Z')) && | |
209 | filename[1] == ':'); | |
210 | } | |
3b46e624 | 211 | |
508c7cb3 | 212 | int is_windows_drive(const char *filename) |
19cb3738 | 213 | { |
5fafdf24 | 214 | if (is_windows_drive_prefix(filename) && |
f45512fe | 215 | filename[2] == '\0') |
19cb3738 FB |
216 | return 1; |
217 | if (strstart(filename, "\\\\.\\", NULL) || | |
218 | strstart(filename, "//./", NULL)) | |
219 | return 1; | |
220 | return 0; | |
221 | } | |
222 | #endif | |
223 | ||
83f64091 FB |
224 | static BlockDriver *find_protocol(const char *filename) |
225 | { | |
226 | BlockDriver *drv1; | |
227 | char protocol[128]; | |
707c0dbc | 228 | int len = strnlen(filename, 127)+1; |
83f64091 | 229 | const char *p; |
19cb3738 FB |
230 | |
231 | #ifdef _WIN32 | |
f45512fe FB |
232 | if (is_windows_drive(filename) || |
233 | is_windows_drive_prefix(filename)) | |
5efa9d5a | 234 | return bdrv_find_format("raw"); |
19cb3738 | 235 | #endif |
707c0dbc RP |
236 | p = fill_token(protocol, len, filename, ':'); |
237 | if (*p != ':') | |
5efa9d5a | 238 | return bdrv_find_format("raw"); |
83f64091 | 239 | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { |
5fafdf24 | 240 | if (drv1->protocol_name && |
83f64091 FB |
241 | !strcmp(drv1->protocol_name, protocol)) |
242 | return drv1; | |
243 | } | |
244 | return NULL; | |
245 | } | |
246 | ||
f3a5d3f8 CH |
247 | /* |
248 | * Detect host devices. By convention, /dev/cdrom[N] is always | |
249 | * recognized as a host CDROM. | |
250 | */ | |
f3a5d3f8 CH |
251 | static BlockDriver *find_hdev_driver(const char *filename) |
252 | { | |
508c7cb3 CH |
253 | int score_max = 0, score; |
254 | BlockDriver *drv = NULL, *d; | |
f3a5d3f8 | 255 | |
508c7cb3 CH |
256 | for (d = first_drv; d; d = d->next) { |
257 | if (d->bdrv_probe_device) { | |
258 | score = d->bdrv_probe_device(filename); | |
259 | if (score > score_max) { | |
260 | score_max = score; | |
261 | drv = d; | |
262 | } | |
263 | } | |
19cb3738 | 264 | } |
f3a5d3f8 | 265 | |
508c7cb3 | 266 | return drv; |
f3a5d3f8 | 267 | } |
3b46e624 | 268 | |
f3a5d3f8 CH |
269 | static BlockDriver *find_image_format(const char *filename) |
270 | { | |
271 | int ret, score, score_max; | |
272 | BlockDriver *drv1, *drv; | |
273 | uint8_t buf[2048]; | |
274 | BlockDriverState *bs; | |
275 | ||
83f64091 | 276 | drv = find_protocol(filename); |
19cb3738 | 277 | /* no need to test disk image formats for vvfat */ |
c833ab73 | 278 | if (drv && strcmp(drv->format_name, "vvfat") == 0) |
83f64091 | 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(""); | |
83f64091 FB |
309 | ret = bdrv_open2(bs, filename, flags | BDRV_O_FILE, NULL); |
310 | if (ret < 0) { | |
311 | bdrv_delete(bs); | |
312 | return ret; | |
3b0d4f61 | 313 | } |
71d0770c | 314 | bs->growable = 1; |
83f64091 FB |
315 | *pbs = bs; |
316 | return 0; | |
317 | } | |
318 | ||
319 | int bdrv_open(BlockDriverState *bs, const char *filename, int flags) | |
320 | { | |
321 | return bdrv_open2(bs, filename, flags, NULL); | |
ea2384d3 FB |
322 | } |
323 | ||
83f64091 | 324 | int bdrv_open2(BlockDriverState *bs, const char *filename, int flags, |
ea2384d3 FB |
325 | BlockDriver *drv) |
326 | { | |
83f64091 | 327 | int ret, open_flags; |
eb5c851f TS |
328 | char tmp_filename[PATH_MAX]; |
329 | char backing_filename[PATH_MAX]; | |
3b46e624 | 330 | |
ea2384d3 FB |
331 | bs->read_only = 0; |
332 | bs->is_temporary = 0; | |
333 | bs->encrypted = 0; | |
c0f4ce77 | 334 | bs->valid_key = 0; |
e268ca52 AL |
335 | /* buffer_alignment defaulted to 512, drivers can change this value */ |
336 | bs->buffer_alignment = 512; | |
712e7874 | 337 | |
83f64091 | 338 | if (flags & BDRV_O_SNAPSHOT) { |
ea2384d3 FB |
339 | BlockDriverState *bs1; |
340 | int64_t total_size; | |
7c96d46e | 341 | int is_protocol = 0; |
91a073a9 KW |
342 | BlockDriver *bdrv_qcow2; |
343 | QEMUOptionParameter *options; | |
3b46e624 | 344 | |
ea2384d3 FB |
345 | /* if snapshot, we create a temporary backing file and open it |
346 | instead of opening 'filename' directly */ | |
33e3963e | 347 | |
ea2384d3 FB |
348 | /* if there is a backing file, use it */ |
349 | bs1 = bdrv_new(""); | |
5eb45639 | 350 | ret = bdrv_open2(bs1, filename, 0, drv); |
51d7c00c | 351 | if (ret < 0) { |
ea2384d3 | 352 | bdrv_delete(bs1); |
51d7c00c | 353 | return ret; |
ea2384d3 | 354 | } |
83f64091 | 355 | total_size = bdrv_getlength(bs1) >> SECTOR_BITS; |
7c96d46e AL |
356 | |
357 | if (bs1->drv && bs1->drv->protocol_name) | |
358 | is_protocol = 1; | |
359 | ||
ea2384d3 | 360 | bdrv_delete(bs1); |
3b46e624 | 361 | |
ea2384d3 | 362 | get_tmp_filename(tmp_filename, sizeof(tmp_filename)); |
7c96d46e AL |
363 | |
364 | /* Real path is meaningless for protocols */ | |
365 | if (is_protocol) | |
366 | snprintf(backing_filename, sizeof(backing_filename), | |
367 | "%s", filename); | |
368 | else | |
369 | realpath(filename, backing_filename); | |
370 | ||
91a073a9 KW |
371 | bdrv_qcow2 = bdrv_find_format("qcow2"); |
372 | options = parse_option_parameters("", bdrv_qcow2->create_options, NULL); | |
373 | ||
374 | set_option_parameter_int(options, BLOCK_OPT_SIZE, total_size * 512); | |
375 | set_option_parameter(options, BLOCK_OPT_BACKING_FILE, backing_filename); | |
376 | if (drv) { | |
377 | set_option_parameter(options, BLOCK_OPT_BACKING_FMT, | |
378 | drv->format_name); | |
379 | } | |
380 | ||
381 | ret = bdrv_create(bdrv_qcow2, tmp_filename, options); | |
51d7c00c AL |
382 | if (ret < 0) { |
383 | return ret; | |
ea2384d3 | 384 | } |
91a073a9 | 385 | |
ea2384d3 | 386 | filename = tmp_filename; |
91a073a9 | 387 | drv = bdrv_qcow2; |
ea2384d3 FB |
388 | bs->is_temporary = 1; |
389 | } | |
712e7874 | 390 | |
ea2384d3 | 391 | pstrcpy(bs->filename, sizeof(bs->filename), filename); |
83f64091 FB |
392 | if (flags & BDRV_O_FILE) { |
393 | drv = find_protocol(filename); | |
51d7c00c | 394 | } else if (!drv) { |
f3a5d3f8 CH |
395 | drv = find_hdev_driver(filename); |
396 | if (!drv) { | |
397 | drv = find_image_format(filename); | |
398 | } | |
51d7c00c AL |
399 | } |
400 | if (!drv) { | |
401 | ret = -ENOENT; | |
402 | goto unlink_and_fail; | |
ea2384d3 FB |
403 | } |
404 | bs->drv = drv; | |
405 | bs->opaque = qemu_mallocz(drv->instance_size); | |
83f64091 FB |
406 | /* Note: for compatibility, we open disk image files as RDWR, and |
407 | RDONLY as fallback */ | |
408 | if (!(flags & BDRV_O_FILE)) | |
9f7965c7 | 409 | open_flags = BDRV_O_RDWR | (flags & BDRV_O_CACHE_MASK); |
83f64091 FB |
410 | else |
411 | open_flags = flags & ~(BDRV_O_FILE | BDRV_O_SNAPSHOT); | |
707c0dbc | 412 | ret = bdrv_open3(bs, filename, open_flags, drv); |
a0a83536 | 413 | if ((ret == -EACCES || ret == -EPERM) && !(flags & BDRV_O_FILE)) { |
707c0dbc | 414 | ret = bdrv_open3(bs, filename, open_flags & ~BDRV_O_RDWR, drv); |
83f64091 FB |
415 | bs->read_only = 1; |
416 | } | |
ea2384d3 FB |
417 | if (ret < 0) { |
418 | qemu_free(bs->opaque); | |
6b21b973 FB |
419 | bs->opaque = NULL; |
420 | bs->drv = NULL; | |
51d7c00c AL |
421 | unlink_and_fail: |
422 | if (bs->is_temporary) | |
423 | unlink(filename); | |
83f64091 | 424 | return ret; |
33e3963e | 425 | } |
d15a771d FB |
426 | if (drv->bdrv_getlength) { |
427 | bs->total_sectors = bdrv_getlength(bs) >> SECTOR_BITS; | |
428 | } | |
67b915a5 | 429 | #ifndef _WIN32 |
ea2384d3 FB |
430 | if (bs->is_temporary) { |
431 | unlink(filename); | |
432 | } | |
433 | #endif | |
83f64091 | 434 | if (bs->backing_file[0] != '\0') { |
ea2384d3 | 435 | /* if there is a backing file, use it */ |
5eb45639 | 436 | BlockDriver *back_drv = NULL; |
ea2384d3 | 437 | bs->backing_hd = bdrv_new(""); |
83f64091 FB |
438 | path_combine(backing_filename, sizeof(backing_filename), |
439 | filename, bs->backing_file); | |
5eb45639 AL |
440 | if (bs->backing_format[0] != '\0') |
441 | back_drv = bdrv_find_format(bs->backing_format); | |
442 | ret = bdrv_open2(bs->backing_hd, backing_filename, open_flags, | |
443 | back_drv); | |
51d7c00c AL |
444 | if (ret < 0) { |
445 | bdrv_close(bs); | |
446 | return ret; | |
447 | } | |
33e3963e FB |
448 | } |
449 | ||
bb5fc20f AL |
450 | if (!bdrv_key_required(bs)) { |
451 | /* call the change callback */ | |
452 | bs->media_changed = 1; | |
453 | if (bs->change_cb) | |
454 | bs->change_cb(bs->change_opaque); | |
455 | } | |
b338082b | 456 | return 0; |
fc01f7e7 FB |
457 | } |
458 | ||
707c0dbc RP |
459 | int bdrv_open3(BlockDriverState *bs, const char *filename, int flags, BlockDriver *drv) |
460 | { | |
461 | char myfile[PATH_MAX]; | |
462 | const char *f; | |
463 | ||
464 | if (!strstart(filename, "file:", &f)) { | |
465 | fill_token(myfile, PATH_MAX, filename, '\0'); | |
466 | return drv->bdrv_open(bs,myfile,flags); | |
467 | } | |
468 | return drv->bdrv_open(bs,f,flags); | |
469 | } | |
470 | ||
fc01f7e7 FB |
471 | void bdrv_close(BlockDriverState *bs) |
472 | { | |
19cb3738 | 473 | if (bs->drv) { |
ea2384d3 FB |
474 | if (bs->backing_hd) |
475 | bdrv_delete(bs->backing_hd); | |
476 | bs->drv->bdrv_close(bs); | |
477 | qemu_free(bs->opaque); | |
478 | #ifdef _WIN32 | |
479 | if (bs->is_temporary) { | |
480 | unlink(bs->filename); | |
481 | } | |
67b915a5 | 482 | #endif |
ea2384d3 FB |
483 | bs->opaque = NULL; |
484 | bs->drv = NULL; | |
b338082b FB |
485 | |
486 | /* call the change callback */ | |
19cb3738 | 487 | bs->media_changed = 1; |
b338082b FB |
488 | if (bs->change_cb) |
489 | bs->change_cb(bs->change_opaque); | |
490 | } | |
491 | } | |
492 | ||
493 | void bdrv_delete(BlockDriverState *bs) | |
494 | { | |
34c6f050 AJ |
495 | BlockDriverState **pbs; |
496 | ||
497 | pbs = &bdrv_first; | |
498 | while (*pbs != bs && *pbs != NULL) | |
499 | pbs = &(*pbs)->next; | |
500 | if (*pbs == bs) | |
501 | *pbs = bs->next; | |
502 | ||
b338082b FB |
503 | bdrv_close(bs); |
504 | qemu_free(bs); | |
fc01f7e7 FB |
505 | } |
506 | ||
e97fc193 AL |
507 | /* |
508 | * Run consistency checks on an image | |
509 | * | |
510 | * Returns the number of errors or -errno when an internal error occurs | |
511 | */ | |
512 | int bdrv_check(BlockDriverState *bs) | |
513 | { | |
514 | if (bs->drv->bdrv_check == NULL) { | |
515 | return -ENOTSUP; | |
516 | } | |
517 | ||
518 | return bs->drv->bdrv_check(bs); | |
519 | } | |
520 | ||
33e3963e FB |
521 | /* commit COW file into the raw image */ |
522 | int bdrv_commit(BlockDriverState *bs) | |
523 | { | |
19cb3738 | 524 | BlockDriver *drv = bs->drv; |
83f64091 | 525 | int64_t i, total_sectors; |
ea2384d3 FB |
526 | int n, j; |
527 | unsigned char sector[512]; | |
33e3963e | 528 | |
19cb3738 FB |
529 | if (!drv) |
530 | return -ENOMEDIUM; | |
33e3963e FB |
531 | |
532 | if (bs->read_only) { | |
ea2384d3 | 533 | return -EACCES; |
33e3963e FB |
534 | } |
535 | ||
ea2384d3 FB |
536 | if (!bs->backing_hd) { |
537 | return -ENOTSUP; | |
538 | } | |
33e3963e | 539 | |
83f64091 FB |
540 | total_sectors = bdrv_getlength(bs) >> SECTOR_BITS; |
541 | for (i = 0; i < total_sectors;) { | |
19cb3738 | 542 | if (drv->bdrv_is_allocated(bs, i, 65536, &n)) { |
ea2384d3 FB |
543 | for(j = 0; j < n; j++) { |
544 | if (bdrv_read(bs, i, sector, 1) != 0) { | |
545 | return -EIO; | |
546 | } | |
547 | ||
548 | if (bdrv_write(bs->backing_hd, i, sector, 1) != 0) { | |
549 | return -EIO; | |
550 | } | |
551 | i++; | |
33e3963e | 552 | } |
ea2384d3 FB |
553 | } else { |
554 | i += n; | |
555 | } | |
33e3963e | 556 | } |
95389c86 | 557 | |
19cb3738 FB |
558 | if (drv->bdrv_make_empty) |
559 | return drv->bdrv_make_empty(bs); | |
95389c86 | 560 | |
33e3963e FB |
561 | return 0; |
562 | } | |
563 | ||
71d0770c AL |
564 | static int bdrv_check_byte_request(BlockDriverState *bs, int64_t offset, |
565 | size_t size) | |
566 | { | |
567 | int64_t len; | |
568 | ||
569 | if (!bdrv_is_inserted(bs)) | |
570 | return -ENOMEDIUM; | |
571 | ||
572 | if (bs->growable) | |
573 | return 0; | |
574 | ||
575 | len = bdrv_getlength(bs); | |
576 | ||
fbb7b4e0 KW |
577 | if (offset < 0) |
578 | return -EIO; | |
579 | ||
580 | if ((offset > len) || (len - offset < size)) | |
71d0770c AL |
581 | return -EIO; |
582 | ||
583 | return 0; | |
584 | } | |
585 | ||
586 | static int bdrv_check_request(BlockDriverState *bs, int64_t sector_num, | |
587 | int nb_sectors) | |
588 | { | |
999dec57 | 589 | return bdrv_check_byte_request(bs, sector_num * 512, nb_sectors * 512); |
71d0770c AL |
590 | } |
591 | ||
19cb3738 | 592 | /* return < 0 if error. See bdrv_write() for the return codes */ |
5fafdf24 | 593 | int bdrv_read(BlockDriverState *bs, int64_t sector_num, |
fc01f7e7 FB |
594 | uint8_t *buf, int nb_sectors) |
595 | { | |
ea2384d3 FB |
596 | BlockDriver *drv = bs->drv; |
597 | ||
19cb3738 FB |
598 | if (!drv) |
599 | return -ENOMEDIUM; | |
71d0770c AL |
600 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
601 | return -EIO; | |
b338082b | 602 | |
eda578e5 | 603 | return drv->bdrv_read(bs, sector_num, buf, nb_sectors); |
fc01f7e7 FB |
604 | } |
605 | ||
5fafdf24 | 606 | /* Return < 0 if error. Important errors are: |
19cb3738 FB |
607 | -EIO generic I/O error (may happen for all errors) |
608 | -ENOMEDIUM No media inserted. | |
609 | -EINVAL Invalid sector number or nb_sectors | |
610 | -EACCES Trying to write a read-only device | |
611 | */ | |
5fafdf24 | 612 | int bdrv_write(BlockDriverState *bs, int64_t sector_num, |
fc01f7e7 FB |
613 | const uint8_t *buf, int nb_sectors) |
614 | { | |
83f64091 | 615 | BlockDriver *drv = bs->drv; |
19cb3738 FB |
616 | if (!bs->drv) |
617 | return -ENOMEDIUM; | |
0849bf08 | 618 | if (bs->read_only) |
19cb3738 | 619 | return -EACCES; |
71d0770c AL |
620 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
621 | return -EIO; | |
622 | ||
42fb2807 | 623 | return drv->bdrv_write(bs, sector_num, buf, nb_sectors); |
83f64091 FB |
624 | } |
625 | ||
eda578e5 AL |
626 | int bdrv_pread(BlockDriverState *bs, int64_t offset, |
627 | void *buf, int count1) | |
83f64091 | 628 | { |
83f64091 FB |
629 | uint8_t tmp_buf[SECTOR_SIZE]; |
630 | int len, nb_sectors, count; | |
631 | int64_t sector_num; | |
632 | ||
633 | count = count1; | |
634 | /* first read to align to sector start */ | |
635 | len = (SECTOR_SIZE - offset) & (SECTOR_SIZE - 1); | |
636 | if (len > count) | |
637 | len = count; | |
638 | sector_num = offset >> SECTOR_BITS; | |
639 | if (len > 0) { | |
640 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) | |
641 | return -EIO; | |
642 | memcpy(buf, tmp_buf + (offset & (SECTOR_SIZE - 1)), len); | |
643 | count -= len; | |
644 | if (count == 0) | |
645 | return count1; | |
646 | sector_num++; | |
647 | buf += len; | |
648 | } | |
649 | ||
650 | /* read the sectors "in place" */ | |
651 | nb_sectors = count >> SECTOR_BITS; | |
652 | if (nb_sectors > 0) { | |
653 | if (bdrv_read(bs, sector_num, buf, nb_sectors) < 0) | |
654 | return -EIO; | |
655 | sector_num += nb_sectors; | |
656 | len = nb_sectors << SECTOR_BITS; | |
657 | buf += len; | |
658 | count -= len; | |
659 | } | |
660 | ||
661 | /* add data from the last sector */ | |
662 | if (count > 0) { | |
663 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) | |
664 | return -EIO; | |
665 | memcpy(buf, tmp_buf, count); | |
666 | } | |
667 | return count1; | |
668 | } | |
669 | ||
eda578e5 AL |
670 | int bdrv_pwrite(BlockDriverState *bs, int64_t offset, |
671 | const void *buf, int count1) | |
83f64091 | 672 | { |
83f64091 FB |
673 | uint8_t tmp_buf[SECTOR_SIZE]; |
674 | int len, nb_sectors, count; | |
675 | int64_t sector_num; | |
676 | ||
677 | count = count1; | |
678 | /* first write to align to sector start */ | |
679 | len = (SECTOR_SIZE - offset) & (SECTOR_SIZE - 1); | |
680 | if (len > count) | |
681 | len = count; | |
682 | sector_num = offset >> SECTOR_BITS; | |
683 | if (len > 0) { | |
684 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) | |
685 | return -EIO; | |
686 | memcpy(tmp_buf + (offset & (SECTOR_SIZE - 1)), buf, len); | |
687 | if (bdrv_write(bs, sector_num, tmp_buf, 1) < 0) | |
688 | return -EIO; | |
689 | count -= len; | |
690 | if (count == 0) | |
691 | return count1; | |
692 | sector_num++; | |
693 | buf += len; | |
694 | } | |
695 | ||
696 | /* write the sectors "in place" */ | |
697 | nb_sectors = count >> SECTOR_BITS; | |
698 | if (nb_sectors > 0) { | |
699 | if (bdrv_write(bs, sector_num, buf, nb_sectors) < 0) | |
700 | return -EIO; | |
701 | sector_num += nb_sectors; | |
702 | len = nb_sectors << SECTOR_BITS; | |
703 | buf += len; | |
704 | count -= len; | |
705 | } | |
706 | ||
707 | /* add data from the last sector */ | |
708 | if (count > 0) { | |
709 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) | |
710 | return -EIO; | |
711 | memcpy(tmp_buf, buf, count); | |
712 | if (bdrv_write(bs, sector_num, tmp_buf, 1) < 0) | |
713 | return -EIO; | |
714 | } | |
715 | return count1; | |
716 | } | |
83f64091 | 717 | |
83f64091 FB |
718 | /** |
719 | * Truncate file to 'offset' bytes (needed only for file protocols) | |
720 | */ | |
721 | int bdrv_truncate(BlockDriverState *bs, int64_t offset) | |
722 | { | |
723 | BlockDriver *drv = bs->drv; | |
724 | if (!drv) | |
19cb3738 | 725 | return -ENOMEDIUM; |
83f64091 FB |
726 | if (!drv->bdrv_truncate) |
727 | return -ENOTSUP; | |
728 | return drv->bdrv_truncate(bs, offset); | |
729 | } | |
730 | ||
731 | /** | |
732 | * Length of a file in bytes. Return < 0 if error or unknown. | |
733 | */ | |
734 | int64_t bdrv_getlength(BlockDriverState *bs) | |
735 | { | |
736 | BlockDriver *drv = bs->drv; | |
737 | if (!drv) | |
19cb3738 | 738 | return -ENOMEDIUM; |
83f64091 FB |
739 | if (!drv->bdrv_getlength) { |
740 | /* legacy mode */ | |
741 | return bs->total_sectors * SECTOR_SIZE; | |
742 | } | |
743 | return drv->bdrv_getlength(bs); | |
fc01f7e7 FB |
744 | } |
745 | ||
19cb3738 | 746 | /* return 0 as number of sectors if no device present or error */ |
96b8f136 | 747 | void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr) |
fc01f7e7 | 748 | { |
19cb3738 FB |
749 | int64_t length; |
750 | length = bdrv_getlength(bs); | |
751 | if (length < 0) | |
752 | length = 0; | |
753 | else | |
754 | length = length >> SECTOR_BITS; | |
755 | *nb_sectors_ptr = length; | |
fc01f7e7 | 756 | } |
cf98951b | 757 | |
f3d54fc4 AL |
758 | struct partition { |
759 | uint8_t boot_ind; /* 0x80 - active */ | |
760 | uint8_t head; /* starting head */ | |
761 | uint8_t sector; /* starting sector */ | |
762 | uint8_t cyl; /* starting cylinder */ | |
763 | uint8_t sys_ind; /* What partition type */ | |
764 | uint8_t end_head; /* end head */ | |
765 | uint8_t end_sector; /* end sector */ | |
766 | uint8_t end_cyl; /* end cylinder */ | |
767 | uint32_t start_sect; /* starting sector counting from 0 */ | |
768 | uint32_t nr_sects; /* nr of sectors in partition */ | |
769 | } __attribute__((packed)); | |
770 | ||
771 | /* try to guess the disk logical geometry from the MSDOS partition table. Return 0 if OK, -1 if could not guess */ | |
772 | static int guess_disk_lchs(BlockDriverState *bs, | |
773 | int *pcylinders, int *pheads, int *psectors) | |
774 | { | |
775 | uint8_t buf[512]; | |
776 | int ret, i, heads, sectors, cylinders; | |
777 | struct partition *p; | |
778 | uint32_t nr_sects; | |
a38131b6 | 779 | uint64_t nb_sectors; |
f3d54fc4 AL |
780 | |
781 | bdrv_get_geometry(bs, &nb_sectors); | |
782 | ||
783 | ret = bdrv_read(bs, 0, buf, 1); | |
784 | if (ret < 0) | |
785 | return -1; | |
786 | /* test msdos magic */ | |
787 | if (buf[510] != 0x55 || buf[511] != 0xaa) | |
788 | return -1; | |
789 | for(i = 0; i < 4; i++) { | |
790 | p = ((struct partition *)(buf + 0x1be)) + i; | |
791 | nr_sects = le32_to_cpu(p->nr_sects); | |
792 | if (nr_sects && p->end_head) { | |
793 | /* We make the assumption that the partition terminates on | |
794 | a cylinder boundary */ | |
795 | heads = p->end_head + 1; | |
796 | sectors = p->end_sector & 63; | |
797 | if (sectors == 0) | |
798 | continue; | |
799 | cylinders = nb_sectors / (heads * sectors); | |
800 | if (cylinders < 1 || cylinders > 16383) | |
801 | continue; | |
802 | *pheads = heads; | |
803 | *psectors = sectors; | |
804 | *pcylinders = cylinders; | |
805 | #if 0 | |
806 | printf("guessed geometry: LCHS=%d %d %d\n", | |
807 | cylinders, heads, sectors); | |
808 | #endif | |
809 | return 0; | |
810 | } | |
811 | } | |
812 | return -1; | |
813 | } | |
814 | ||
815 | void bdrv_guess_geometry(BlockDriverState *bs, int *pcyls, int *pheads, int *psecs) | |
816 | { | |
817 | int translation, lba_detected = 0; | |
818 | int cylinders, heads, secs; | |
a38131b6 | 819 | uint64_t nb_sectors; |
f3d54fc4 AL |
820 | |
821 | /* if a geometry hint is available, use it */ | |
822 | bdrv_get_geometry(bs, &nb_sectors); | |
823 | bdrv_get_geometry_hint(bs, &cylinders, &heads, &secs); | |
824 | translation = bdrv_get_translation_hint(bs); | |
825 | if (cylinders != 0) { | |
826 | *pcyls = cylinders; | |
827 | *pheads = heads; | |
828 | *psecs = secs; | |
829 | } else { | |
830 | if (guess_disk_lchs(bs, &cylinders, &heads, &secs) == 0) { | |
831 | if (heads > 16) { | |
832 | /* if heads > 16, it means that a BIOS LBA | |
833 | translation was active, so the default | |
834 | hardware geometry is OK */ | |
835 | lba_detected = 1; | |
836 | goto default_geometry; | |
837 | } else { | |
838 | *pcyls = cylinders; | |
839 | *pheads = heads; | |
840 | *psecs = secs; | |
841 | /* disable any translation to be in sync with | |
842 | the logical geometry */ | |
843 | if (translation == BIOS_ATA_TRANSLATION_AUTO) { | |
844 | bdrv_set_translation_hint(bs, | |
845 | BIOS_ATA_TRANSLATION_NONE); | |
846 | } | |
847 | } | |
848 | } else { | |
849 | default_geometry: | |
850 | /* if no geometry, use a standard physical disk geometry */ | |
851 | cylinders = nb_sectors / (16 * 63); | |
852 | ||
853 | if (cylinders > 16383) | |
854 | cylinders = 16383; | |
855 | else if (cylinders < 2) | |
856 | cylinders = 2; | |
857 | *pcyls = cylinders; | |
858 | *pheads = 16; | |
859 | *psecs = 63; | |
860 | if ((lba_detected == 1) && (translation == BIOS_ATA_TRANSLATION_AUTO)) { | |
861 | if ((*pcyls * *pheads) <= 131072) { | |
862 | bdrv_set_translation_hint(bs, | |
863 | BIOS_ATA_TRANSLATION_LARGE); | |
864 | } else { | |
865 | bdrv_set_translation_hint(bs, | |
866 | BIOS_ATA_TRANSLATION_LBA); | |
867 | } | |
868 | } | |
869 | } | |
870 | bdrv_set_geometry_hint(bs, *pcyls, *pheads, *psecs); | |
871 | } | |
872 | } | |
873 | ||
5fafdf24 | 874 | void bdrv_set_geometry_hint(BlockDriverState *bs, |
b338082b FB |
875 | int cyls, int heads, int secs) |
876 | { | |
877 | bs->cyls = cyls; | |
878 | bs->heads = heads; | |
879 | bs->secs = secs; | |
880 | } | |
881 | ||
882 | void bdrv_set_type_hint(BlockDriverState *bs, int type) | |
883 | { | |
884 | bs->type = type; | |
885 | bs->removable = ((type == BDRV_TYPE_CDROM || | |
886 | type == BDRV_TYPE_FLOPPY)); | |
887 | } | |
888 | ||
46d4767d FB |
889 | void bdrv_set_translation_hint(BlockDriverState *bs, int translation) |
890 | { | |
891 | bs->translation = translation; | |
892 | } | |
893 | ||
5fafdf24 | 894 | void bdrv_get_geometry_hint(BlockDriverState *bs, |
b338082b FB |
895 | int *pcyls, int *pheads, int *psecs) |
896 | { | |
897 | *pcyls = bs->cyls; | |
898 | *pheads = bs->heads; | |
899 | *psecs = bs->secs; | |
900 | } | |
901 | ||
902 | int bdrv_get_type_hint(BlockDriverState *bs) | |
903 | { | |
904 | return bs->type; | |
905 | } | |
906 | ||
46d4767d FB |
907 | int bdrv_get_translation_hint(BlockDriverState *bs) |
908 | { | |
909 | return bs->translation; | |
910 | } | |
911 | ||
b338082b FB |
912 | int bdrv_is_removable(BlockDriverState *bs) |
913 | { | |
914 | return bs->removable; | |
915 | } | |
916 | ||
917 | int bdrv_is_read_only(BlockDriverState *bs) | |
918 | { | |
919 | return bs->read_only; | |
920 | } | |
921 | ||
985a03b0 TS |
922 | int bdrv_is_sg(BlockDriverState *bs) |
923 | { | |
924 | return bs->sg; | |
925 | } | |
926 | ||
19cb3738 | 927 | /* XXX: no longer used */ |
5fafdf24 | 928 | void bdrv_set_change_cb(BlockDriverState *bs, |
b338082b FB |
929 | void (*change_cb)(void *opaque), void *opaque) |
930 | { | |
931 | bs->change_cb = change_cb; | |
932 | bs->change_opaque = opaque; | |
933 | } | |
934 | ||
ea2384d3 FB |
935 | int bdrv_is_encrypted(BlockDriverState *bs) |
936 | { | |
937 | if (bs->backing_hd && bs->backing_hd->encrypted) | |
938 | return 1; | |
939 | return bs->encrypted; | |
940 | } | |
941 | ||
c0f4ce77 AL |
942 | int bdrv_key_required(BlockDriverState *bs) |
943 | { | |
944 | BlockDriverState *backing_hd = bs->backing_hd; | |
945 | ||
946 | if (backing_hd && backing_hd->encrypted && !backing_hd->valid_key) | |
947 | return 1; | |
948 | return (bs->encrypted && !bs->valid_key); | |
949 | } | |
950 | ||
ea2384d3 FB |
951 | int bdrv_set_key(BlockDriverState *bs, const char *key) |
952 | { | |
953 | int ret; | |
954 | if (bs->backing_hd && bs->backing_hd->encrypted) { | |
955 | ret = bdrv_set_key(bs->backing_hd, key); | |
956 | if (ret < 0) | |
957 | return ret; | |
958 | if (!bs->encrypted) | |
959 | return 0; | |
960 | } | |
961 | if (!bs->encrypted || !bs->drv || !bs->drv->bdrv_set_key) | |
962 | return -1; | |
c0f4ce77 | 963 | ret = bs->drv->bdrv_set_key(bs, key); |
bb5fc20f AL |
964 | if (ret < 0) { |
965 | bs->valid_key = 0; | |
966 | } else if (!bs->valid_key) { | |
967 | bs->valid_key = 1; | |
968 | /* call the change callback now, we skipped it on open */ | |
969 | bs->media_changed = 1; | |
970 | if (bs->change_cb) | |
971 | bs->change_cb(bs->change_opaque); | |
972 | } | |
c0f4ce77 | 973 | return ret; |
ea2384d3 FB |
974 | } |
975 | ||
976 | void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size) | |
977 | { | |
19cb3738 | 978 | if (!bs->drv) { |
ea2384d3 FB |
979 | buf[0] = '\0'; |
980 | } else { | |
981 | pstrcpy(buf, buf_size, bs->drv->format_name); | |
982 | } | |
983 | } | |
984 | ||
5fafdf24 | 985 | void bdrv_iterate_format(void (*it)(void *opaque, const char *name), |
ea2384d3 FB |
986 | void *opaque) |
987 | { | |
988 | BlockDriver *drv; | |
989 | ||
990 | for (drv = first_drv; drv != NULL; drv = drv->next) { | |
991 | it(opaque, drv->format_name); | |
992 | } | |
993 | } | |
994 | ||
b338082b FB |
995 | BlockDriverState *bdrv_find(const char *name) |
996 | { | |
997 | BlockDriverState *bs; | |
998 | ||
999 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { | |
1000 | if (!strcmp(name, bs->device_name)) | |
1001 | return bs; | |
1002 | } | |
1003 | return NULL; | |
1004 | } | |
1005 | ||
51de9760 | 1006 | void bdrv_iterate(void (*it)(void *opaque, BlockDriverState *bs), void *opaque) |
81d0912d FB |
1007 | { |
1008 | BlockDriverState *bs; | |
1009 | ||
1010 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { | |
51de9760 | 1011 | it(opaque, bs); |
81d0912d FB |
1012 | } |
1013 | } | |
1014 | ||
ea2384d3 FB |
1015 | const char *bdrv_get_device_name(BlockDriverState *bs) |
1016 | { | |
1017 | return bs->device_name; | |
1018 | } | |
1019 | ||
7a6cba61 PB |
1020 | void bdrv_flush(BlockDriverState *bs) |
1021 | { | |
081501da AL |
1022 | if (!bs->drv) |
1023 | return; | |
7a6cba61 PB |
1024 | if (bs->drv->bdrv_flush) |
1025 | bs->drv->bdrv_flush(bs); | |
1026 | if (bs->backing_hd) | |
1027 | bdrv_flush(bs->backing_hd); | |
1028 | } | |
1029 | ||
c6ca28d6 AL |
1030 | void bdrv_flush_all(void) |
1031 | { | |
1032 | BlockDriverState *bs; | |
1033 | ||
1034 | for (bs = bdrv_first; bs != NULL; bs = bs->next) | |
1035 | if (bs->drv && !bdrv_is_read_only(bs) && | |
1036 | (!bdrv_is_removable(bs) || bdrv_is_inserted(bs))) | |
1037 | bdrv_flush(bs); | |
1038 | } | |
1039 | ||
f58c7b35 TS |
1040 | /* |
1041 | * Returns true iff the specified sector is present in the disk image. Drivers | |
1042 | * not implementing the functionality are assumed to not support backing files, | |
1043 | * hence all their sectors are reported as allocated. | |
1044 | * | |
1045 | * 'pnum' is set to the number of sectors (including and immediately following | |
1046 | * the specified sector) that are known to be in the same | |
1047 | * allocated/unallocated state. | |
1048 | * | |
1049 | * 'nb_sectors' is the max value 'pnum' should be set to. | |
1050 | */ | |
1051 | int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, | |
1052 | int *pnum) | |
1053 | { | |
1054 | int64_t n; | |
1055 | if (!bs->drv->bdrv_is_allocated) { | |
1056 | if (sector_num >= bs->total_sectors) { | |
1057 | *pnum = 0; | |
1058 | return 0; | |
1059 | } | |
1060 | n = bs->total_sectors - sector_num; | |
1061 | *pnum = (n < nb_sectors) ? (n) : (nb_sectors); | |
1062 | return 1; | |
1063 | } | |
1064 | return bs->drv->bdrv_is_allocated(bs, sector_num, nb_sectors, pnum); | |
1065 | } | |
1066 | ||
376253ec | 1067 | void bdrv_info(Monitor *mon) |
b338082b FB |
1068 | { |
1069 | BlockDriverState *bs; | |
1070 | ||
1071 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { | |
376253ec AL |
1072 | monitor_printf(mon, "%s:", bs->device_name); |
1073 | monitor_printf(mon, " type="); | |
b338082b FB |
1074 | switch(bs->type) { |
1075 | case BDRV_TYPE_HD: | |
376253ec | 1076 | monitor_printf(mon, "hd"); |
b338082b FB |
1077 | break; |
1078 | case BDRV_TYPE_CDROM: | |
376253ec | 1079 | monitor_printf(mon, "cdrom"); |
b338082b FB |
1080 | break; |
1081 | case BDRV_TYPE_FLOPPY: | |
376253ec | 1082 | monitor_printf(mon, "floppy"); |
b338082b FB |
1083 | break; |
1084 | } | |
376253ec | 1085 | monitor_printf(mon, " removable=%d", bs->removable); |
b338082b | 1086 | if (bs->removable) { |
376253ec | 1087 | monitor_printf(mon, " locked=%d", bs->locked); |
b338082b | 1088 | } |
19cb3738 | 1089 | if (bs->drv) { |
376253ec AL |
1090 | monitor_printf(mon, " file="); |
1091 | monitor_print_filename(mon, bs->filename); | |
fef30743 | 1092 | if (bs->backing_file[0] != '\0') { |
376253ec AL |
1093 | monitor_printf(mon, " backing_file="); |
1094 | monitor_print_filename(mon, bs->backing_file); | |
1095 | } | |
1096 | monitor_printf(mon, " ro=%d", bs->read_only); | |
1097 | monitor_printf(mon, " drv=%s", bs->drv->format_name); | |
1098 | monitor_printf(mon, " encrypted=%d", bdrv_is_encrypted(bs)); | |
b338082b | 1099 | } else { |
376253ec | 1100 | monitor_printf(mon, " [not inserted]"); |
b338082b | 1101 | } |
376253ec | 1102 | monitor_printf(mon, "\n"); |
b338082b FB |
1103 | } |
1104 | } | |
a36e69dd TS |
1105 | |
1106 | /* The "info blockstats" command. */ | |
376253ec | 1107 | void bdrv_info_stats(Monitor *mon) |
a36e69dd TS |
1108 | { |
1109 | BlockDriverState *bs; | |
1110 | ||
1111 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { | |
376253ec AL |
1112 | monitor_printf(mon, "%s:" |
1113 | " rd_bytes=%" PRIu64 | |
1114 | " wr_bytes=%" PRIu64 | |
1115 | " rd_operations=%" PRIu64 | |
1116 | " wr_operations=%" PRIu64 | |
ebf53fcd | 1117 | "\n", |
376253ec AL |
1118 | bs->device_name, |
1119 | bs->rd_bytes, bs->wr_bytes, | |
1120 | bs->rd_ops, bs->wr_ops); | |
a36e69dd TS |
1121 | } |
1122 | } | |
ea2384d3 | 1123 | |
045df330 AL |
1124 | const char *bdrv_get_encrypted_filename(BlockDriverState *bs) |
1125 | { | |
1126 | if (bs->backing_hd && bs->backing_hd->encrypted) | |
1127 | return bs->backing_file; | |
1128 | else if (bs->encrypted) | |
1129 | return bs->filename; | |
1130 | else | |
1131 | return NULL; | |
1132 | } | |
1133 | ||
5fafdf24 | 1134 | void bdrv_get_backing_filename(BlockDriverState *bs, |
83f64091 FB |
1135 | char *filename, int filename_size) |
1136 | { | |
1137 | if (!bs->backing_hd) { | |
1138 | pstrcpy(filename, filename_size, ""); | |
1139 | } else { | |
1140 | pstrcpy(filename, filename_size, bs->backing_file); | |
1141 | } | |
1142 | } | |
1143 | ||
5fafdf24 | 1144 | int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num, |
faea38e7 FB |
1145 | const uint8_t *buf, int nb_sectors) |
1146 | { | |
1147 | BlockDriver *drv = bs->drv; | |
1148 | if (!drv) | |
19cb3738 | 1149 | return -ENOMEDIUM; |
faea38e7 FB |
1150 | if (!drv->bdrv_write_compressed) |
1151 | return -ENOTSUP; | |
fbb7b4e0 KW |
1152 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
1153 | return -EIO; | |
faea38e7 FB |
1154 | return drv->bdrv_write_compressed(bs, sector_num, buf, nb_sectors); |
1155 | } | |
3b46e624 | 1156 | |
faea38e7 FB |
1157 | int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) |
1158 | { | |
1159 | BlockDriver *drv = bs->drv; | |
1160 | if (!drv) | |
19cb3738 | 1161 | return -ENOMEDIUM; |
faea38e7 FB |
1162 | if (!drv->bdrv_get_info) |
1163 | return -ENOTSUP; | |
1164 | memset(bdi, 0, sizeof(*bdi)); | |
1165 | return drv->bdrv_get_info(bs, bdi); | |
1166 | } | |
1167 | ||
178e08a5 AL |
1168 | int bdrv_put_buffer(BlockDriverState *bs, const uint8_t *buf, int64_t pos, int size) |
1169 | { | |
1170 | BlockDriver *drv = bs->drv; | |
1171 | if (!drv) | |
1172 | return -ENOMEDIUM; | |
1173 | if (!drv->bdrv_put_buffer) | |
1174 | return -ENOTSUP; | |
1175 | return drv->bdrv_put_buffer(bs, buf, pos, size); | |
1176 | } | |
1177 | ||
1178 | int bdrv_get_buffer(BlockDriverState *bs, uint8_t *buf, int64_t pos, int size) | |
1179 | { | |
1180 | BlockDriver *drv = bs->drv; | |
1181 | if (!drv) | |
1182 | return -ENOMEDIUM; | |
1183 | if (!drv->bdrv_get_buffer) | |
1184 | return -ENOTSUP; | |
1185 | return drv->bdrv_get_buffer(bs, buf, pos, size); | |
1186 | } | |
1187 | ||
faea38e7 FB |
1188 | /**************************************************************/ |
1189 | /* handling of snapshots */ | |
1190 | ||
5fafdf24 | 1191 | int bdrv_snapshot_create(BlockDriverState *bs, |
faea38e7 FB |
1192 | QEMUSnapshotInfo *sn_info) |
1193 | { | |
1194 | BlockDriver *drv = bs->drv; | |
1195 | if (!drv) | |
19cb3738 | 1196 | return -ENOMEDIUM; |
faea38e7 FB |
1197 | if (!drv->bdrv_snapshot_create) |
1198 | return -ENOTSUP; | |
1199 | return drv->bdrv_snapshot_create(bs, sn_info); | |
1200 | } | |
1201 | ||
5fafdf24 | 1202 | int bdrv_snapshot_goto(BlockDriverState *bs, |
faea38e7 FB |
1203 | const char *snapshot_id) |
1204 | { | |
1205 | BlockDriver *drv = bs->drv; | |
1206 | if (!drv) | |
19cb3738 | 1207 | return -ENOMEDIUM; |
faea38e7 FB |
1208 | if (!drv->bdrv_snapshot_goto) |
1209 | return -ENOTSUP; | |
1210 | return drv->bdrv_snapshot_goto(bs, snapshot_id); | |
1211 | } | |
1212 | ||
1213 | int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id) | |
1214 | { | |
1215 | BlockDriver *drv = bs->drv; | |
1216 | if (!drv) | |
19cb3738 | 1217 | return -ENOMEDIUM; |
faea38e7 FB |
1218 | if (!drv->bdrv_snapshot_delete) |
1219 | return -ENOTSUP; | |
1220 | return drv->bdrv_snapshot_delete(bs, snapshot_id); | |
1221 | } | |
1222 | ||
5fafdf24 | 1223 | int bdrv_snapshot_list(BlockDriverState *bs, |
faea38e7 FB |
1224 | QEMUSnapshotInfo **psn_info) |
1225 | { | |
1226 | BlockDriver *drv = bs->drv; | |
1227 | if (!drv) | |
19cb3738 | 1228 | return -ENOMEDIUM; |
faea38e7 FB |
1229 | if (!drv->bdrv_snapshot_list) |
1230 | return -ENOTSUP; | |
1231 | return drv->bdrv_snapshot_list(bs, psn_info); | |
1232 | } | |
1233 | ||
1234 | #define NB_SUFFIXES 4 | |
1235 | ||
1236 | char *get_human_readable_size(char *buf, int buf_size, int64_t size) | |
1237 | { | |
1238 | static const char suffixes[NB_SUFFIXES] = "KMGT"; | |
1239 | int64_t base; | |
1240 | int i; | |
1241 | ||
1242 | if (size <= 999) { | |
1243 | snprintf(buf, buf_size, "%" PRId64, size); | |
1244 | } else { | |
1245 | base = 1024; | |
1246 | for(i = 0; i < NB_SUFFIXES; i++) { | |
1247 | if (size < (10 * base)) { | |
5fafdf24 | 1248 | snprintf(buf, buf_size, "%0.1f%c", |
faea38e7 FB |
1249 | (double)size / base, |
1250 | suffixes[i]); | |
1251 | break; | |
1252 | } else if (size < (1000 * base) || i == (NB_SUFFIXES - 1)) { | |
5fafdf24 | 1253 | snprintf(buf, buf_size, "%" PRId64 "%c", |
faea38e7 FB |
1254 | ((size + (base >> 1)) / base), |
1255 | suffixes[i]); | |
1256 | break; | |
1257 | } | |
1258 | base = base * 1024; | |
1259 | } | |
1260 | } | |
1261 | return buf; | |
1262 | } | |
1263 | ||
1264 | char *bdrv_snapshot_dump(char *buf, int buf_size, QEMUSnapshotInfo *sn) | |
1265 | { | |
1266 | char buf1[128], date_buf[128], clock_buf[128]; | |
3b9f94e1 FB |
1267 | #ifdef _WIN32 |
1268 | struct tm *ptm; | |
1269 | #else | |
faea38e7 | 1270 | struct tm tm; |
3b9f94e1 | 1271 | #endif |
faea38e7 FB |
1272 | time_t ti; |
1273 | int64_t secs; | |
1274 | ||
1275 | if (!sn) { | |
5fafdf24 TS |
1276 | snprintf(buf, buf_size, |
1277 | "%-10s%-20s%7s%20s%15s", | |
faea38e7 FB |
1278 | "ID", "TAG", "VM SIZE", "DATE", "VM CLOCK"); |
1279 | } else { | |
1280 | ti = sn->date_sec; | |
3b9f94e1 FB |
1281 | #ifdef _WIN32 |
1282 | ptm = localtime(&ti); | |
1283 | strftime(date_buf, sizeof(date_buf), | |
1284 | "%Y-%m-%d %H:%M:%S", ptm); | |
1285 | #else | |
faea38e7 FB |
1286 | localtime_r(&ti, &tm); |
1287 | strftime(date_buf, sizeof(date_buf), | |
1288 | "%Y-%m-%d %H:%M:%S", &tm); | |
3b9f94e1 | 1289 | #endif |
faea38e7 FB |
1290 | secs = sn->vm_clock_nsec / 1000000000; |
1291 | snprintf(clock_buf, sizeof(clock_buf), | |
1292 | "%02d:%02d:%02d.%03d", | |
1293 | (int)(secs / 3600), | |
1294 | (int)((secs / 60) % 60), | |
5fafdf24 | 1295 | (int)(secs % 60), |
faea38e7 FB |
1296 | (int)((sn->vm_clock_nsec / 1000000) % 1000)); |
1297 | snprintf(buf, buf_size, | |
5fafdf24 | 1298 | "%-10s%-20s%7s%20s%15s", |
faea38e7 FB |
1299 | sn->id_str, sn->name, |
1300 | get_human_readable_size(buf1, sizeof(buf1), sn->vm_state_size), | |
1301 | date_buf, | |
1302 | clock_buf); | |
1303 | } | |
1304 | return buf; | |
1305 | } | |
1306 | ||
83f64091 | 1307 | |
ea2384d3 | 1308 | /**************************************************************/ |
83f64091 | 1309 | /* async I/Os */ |
ea2384d3 | 1310 | |
3b69e4b9 | 1311 | BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num, |
f141eafe | 1312 | QEMUIOVector *qiov, int nb_sectors, |
3b69e4b9 | 1313 | BlockDriverCompletionFunc *cb, void *opaque) |
83f64091 FB |
1314 | { |
1315 | BlockDriver *drv = bs->drv; | |
a36e69dd | 1316 | BlockDriverAIOCB *ret; |
83f64091 | 1317 | |
19cb3738 | 1318 | if (!drv) |
ce1a14dc | 1319 | return NULL; |
71d0770c AL |
1320 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
1321 | return NULL; | |
3b46e624 | 1322 | |
f141eafe AL |
1323 | ret = drv->bdrv_aio_readv(bs, sector_num, qiov, nb_sectors, |
1324 | cb, opaque); | |
a36e69dd TS |
1325 | |
1326 | if (ret) { | |
1327 | /* Update stats even though technically transfer has not happened. */ | |
1328 | bs->rd_bytes += (unsigned) nb_sectors * SECTOR_SIZE; | |
1329 | bs->rd_ops ++; | |
1330 | } | |
1331 | ||
1332 | return ret; | |
ea2384d3 FB |
1333 | } |
1334 | ||
f141eafe AL |
1335 | BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num, |
1336 | QEMUIOVector *qiov, int nb_sectors, | |
1337 | BlockDriverCompletionFunc *cb, void *opaque) | |
ea2384d3 | 1338 | { |
83f64091 | 1339 | BlockDriver *drv = bs->drv; |
a36e69dd | 1340 | BlockDriverAIOCB *ret; |
ea2384d3 | 1341 | |
19cb3738 | 1342 | if (!drv) |
ce1a14dc | 1343 | return NULL; |
83f64091 | 1344 | if (bs->read_only) |
ce1a14dc | 1345 | return NULL; |
71d0770c AL |
1346 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
1347 | return NULL; | |
83f64091 | 1348 | |
f141eafe AL |
1349 | ret = drv->bdrv_aio_writev(bs, sector_num, qiov, nb_sectors, |
1350 | cb, opaque); | |
a36e69dd TS |
1351 | |
1352 | if (ret) { | |
1353 | /* Update stats even though technically transfer has not happened. */ | |
1354 | bs->wr_bytes += (unsigned) nb_sectors * SECTOR_SIZE; | |
1355 | bs->wr_ops ++; | |
1356 | } | |
1357 | ||
1358 | return ret; | |
83f64091 FB |
1359 | } |
1360 | ||
1361 | void bdrv_aio_cancel(BlockDriverAIOCB *acb) | |
83f64091 | 1362 | { |
6bbff9a0 | 1363 | acb->pool->cancel(acb); |
83f64091 FB |
1364 | } |
1365 | ||
ce1a14dc | 1366 | |
83f64091 FB |
1367 | /**************************************************************/ |
1368 | /* async block device emulation */ | |
1369 | ||
c16b5a2c CH |
1370 | typedef struct BlockDriverAIOCBSync { |
1371 | BlockDriverAIOCB common; | |
1372 | QEMUBH *bh; | |
1373 | int ret; | |
1374 | /* vector translation state */ | |
1375 | QEMUIOVector *qiov; | |
1376 | uint8_t *bounce; | |
1377 | int is_write; | |
1378 | } BlockDriverAIOCBSync; | |
1379 | ||
1380 | static void bdrv_aio_cancel_em(BlockDriverAIOCB *blockacb) | |
1381 | { | |
1382 | BlockDriverAIOCBSync *acb = (BlockDriverAIOCBSync *)blockacb; | |
6a7ad299 | 1383 | qemu_bh_delete(acb->bh); |
c16b5a2c CH |
1384 | qemu_aio_release(acb); |
1385 | } | |
1386 | ||
1387 | static AIOPool bdrv_em_aio_pool = { | |
1388 | .aiocb_size = sizeof(BlockDriverAIOCBSync), | |
1389 | .cancel = bdrv_aio_cancel_em, | |
1390 | }; | |
1391 | ||
ce1a14dc | 1392 | static void bdrv_aio_bh_cb(void *opaque) |
83f64091 | 1393 | { |
ce1a14dc | 1394 | BlockDriverAIOCBSync *acb = opaque; |
f141eafe | 1395 | |
f141eafe AL |
1396 | if (!acb->is_write) |
1397 | qemu_iovec_from_buffer(acb->qiov, acb->bounce, acb->qiov->size); | |
ceb42de8 | 1398 | qemu_vfree(acb->bounce); |
ce1a14dc | 1399 | acb->common.cb(acb->common.opaque, acb->ret); |
6a7ad299 | 1400 | qemu_bh_delete(acb->bh); |
ce1a14dc | 1401 | qemu_aio_release(acb); |
83f64091 | 1402 | } |
beac80cd | 1403 | |
f141eafe AL |
1404 | static BlockDriverAIOCB *bdrv_aio_rw_vector(BlockDriverState *bs, |
1405 | int64_t sector_num, | |
1406 | QEMUIOVector *qiov, | |
1407 | int nb_sectors, | |
1408 | BlockDriverCompletionFunc *cb, | |
1409 | void *opaque, | |
1410 | int is_write) | |
1411 | ||
83f64091 | 1412 | { |
ce1a14dc | 1413 | BlockDriverAIOCBSync *acb; |
ce1a14dc | 1414 | |
c16b5a2c | 1415 | acb = qemu_aio_get(&bdrv_em_aio_pool, bs, cb, opaque); |
f141eafe AL |
1416 | acb->is_write = is_write; |
1417 | acb->qiov = qiov; | |
e268ca52 | 1418 | acb->bounce = qemu_blockalign(bs, qiov->size); |
f141eafe | 1419 | |
ce1a14dc PB |
1420 | if (!acb->bh) |
1421 | acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); | |
f141eafe AL |
1422 | |
1423 | if (is_write) { | |
1424 | qemu_iovec_to_buffer(acb->qiov, acb->bounce); | |
1425 | acb->ret = bdrv_write(bs, sector_num, acb->bounce, nb_sectors); | |
1426 | } else { | |
1427 | acb->ret = bdrv_read(bs, sector_num, acb->bounce, nb_sectors); | |
1428 | } | |
1429 | ||
ce1a14dc | 1430 | qemu_bh_schedule(acb->bh); |
f141eafe | 1431 | |
ce1a14dc | 1432 | return &acb->common; |
beac80cd FB |
1433 | } |
1434 | ||
f141eafe AL |
1435 | static BlockDriverAIOCB *bdrv_aio_readv_em(BlockDriverState *bs, |
1436 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
ce1a14dc | 1437 | BlockDriverCompletionFunc *cb, void *opaque) |
beac80cd | 1438 | { |
f141eafe AL |
1439 | return bdrv_aio_rw_vector(bs, sector_num, qiov, nb_sectors, cb, opaque, 0); |
1440 | } | |
83f64091 | 1441 | |
f141eafe AL |
1442 | static BlockDriverAIOCB *bdrv_aio_writev_em(BlockDriverState *bs, |
1443 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
1444 | BlockDriverCompletionFunc *cb, void *opaque) | |
1445 | { | |
1446 | return bdrv_aio_rw_vector(bs, sector_num, qiov, nb_sectors, cb, opaque, 1); | |
beac80cd | 1447 | } |
beac80cd | 1448 | |
83f64091 FB |
1449 | /**************************************************************/ |
1450 | /* sync block device emulation */ | |
ea2384d3 | 1451 | |
83f64091 FB |
1452 | static void bdrv_rw_em_cb(void *opaque, int ret) |
1453 | { | |
1454 | *(int *)opaque = ret; | |
ea2384d3 FB |
1455 | } |
1456 | ||
83f64091 FB |
1457 | #define NOT_DONE 0x7fffffff |
1458 | ||
5fafdf24 | 1459 | static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
83f64091 | 1460 | uint8_t *buf, int nb_sectors) |
7a6cba61 | 1461 | { |
ce1a14dc PB |
1462 | int async_ret; |
1463 | BlockDriverAIOCB *acb; | |
f141eafe AL |
1464 | struct iovec iov; |
1465 | QEMUIOVector qiov; | |
83f64091 | 1466 | |
83f64091 | 1467 | async_ret = NOT_DONE; |
3f4cb3d3 | 1468 | iov.iov_base = (void *)buf; |
f141eafe AL |
1469 | iov.iov_len = nb_sectors * 512; |
1470 | qemu_iovec_init_external(&qiov, &iov, 1); | |
1471 | acb = bdrv_aio_readv(bs, sector_num, &qiov, nb_sectors, | |
1472 | bdrv_rw_em_cb, &async_ret); | |
baf35cb9 | 1473 | if (acb == NULL) |
ce1a14dc | 1474 | return -1; |
baf35cb9 | 1475 | |
83f64091 FB |
1476 | while (async_ret == NOT_DONE) { |
1477 | qemu_aio_wait(); | |
1478 | } | |
baf35cb9 | 1479 | |
83f64091 | 1480 | return async_ret; |
7a6cba61 PB |
1481 | } |
1482 | ||
83f64091 FB |
1483 | static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, |
1484 | const uint8_t *buf, int nb_sectors) | |
1485 | { | |
ce1a14dc PB |
1486 | int async_ret; |
1487 | BlockDriverAIOCB *acb; | |
f141eafe AL |
1488 | struct iovec iov; |
1489 | QEMUIOVector qiov; | |
83f64091 | 1490 | |
83f64091 | 1491 | async_ret = NOT_DONE; |
f141eafe AL |
1492 | iov.iov_base = (void *)buf; |
1493 | iov.iov_len = nb_sectors * 512; | |
1494 | qemu_iovec_init_external(&qiov, &iov, 1); | |
1495 | acb = bdrv_aio_writev(bs, sector_num, &qiov, nb_sectors, | |
1496 | bdrv_rw_em_cb, &async_ret); | |
baf35cb9 | 1497 | if (acb == NULL) |
ce1a14dc | 1498 | return -1; |
83f64091 FB |
1499 | while (async_ret == NOT_DONE) { |
1500 | qemu_aio_wait(); | |
1501 | } | |
83f64091 FB |
1502 | return async_ret; |
1503 | } | |
ea2384d3 FB |
1504 | |
1505 | void bdrv_init(void) | |
1506 | { | |
5efa9d5a | 1507 | module_call_init(MODULE_INIT_BLOCK); |
ea2384d3 | 1508 | } |
ce1a14dc | 1509 | |
c16b5a2c CH |
1510 | void *qemu_aio_get(AIOPool *pool, BlockDriverState *bs, |
1511 | BlockDriverCompletionFunc *cb, void *opaque) | |
ce1a14dc | 1512 | { |
ce1a14dc PB |
1513 | BlockDriverAIOCB *acb; |
1514 | ||
6bbff9a0 AL |
1515 | if (pool->free_aiocb) { |
1516 | acb = pool->free_aiocb; | |
1517 | pool->free_aiocb = acb->next; | |
ce1a14dc | 1518 | } else { |
6bbff9a0 AL |
1519 | acb = qemu_mallocz(pool->aiocb_size); |
1520 | acb->pool = pool; | |
ce1a14dc PB |
1521 | } |
1522 | acb->bs = bs; | |
1523 | acb->cb = cb; | |
1524 | acb->opaque = opaque; | |
1525 | return acb; | |
1526 | } | |
1527 | ||
1528 | void qemu_aio_release(void *p) | |
1529 | { | |
6bbff9a0 AL |
1530 | BlockDriverAIOCB *acb = (BlockDriverAIOCB *)p; |
1531 | AIOPool *pool = acb->pool; | |
1532 | acb->next = pool->free_aiocb; | |
1533 | pool->free_aiocb = acb; | |
ce1a14dc | 1534 | } |
19cb3738 FB |
1535 | |
1536 | /**************************************************************/ | |
1537 | /* removable device support */ | |
1538 | ||
1539 | /** | |
1540 | * Return TRUE if the media is present | |
1541 | */ | |
1542 | int bdrv_is_inserted(BlockDriverState *bs) | |
1543 | { | |
1544 | BlockDriver *drv = bs->drv; | |
1545 | int ret; | |
1546 | if (!drv) | |
1547 | return 0; | |
1548 | if (!drv->bdrv_is_inserted) | |
1549 | return 1; | |
1550 | ret = drv->bdrv_is_inserted(bs); | |
1551 | return ret; | |
1552 | } | |
1553 | ||
1554 | /** | |
1555 | * Return TRUE if the media changed since the last call to this | |
5fafdf24 | 1556 | * function. It is currently only used for floppy disks |
19cb3738 FB |
1557 | */ |
1558 | int bdrv_media_changed(BlockDriverState *bs) | |
1559 | { | |
1560 | BlockDriver *drv = bs->drv; | |
1561 | int ret; | |
1562 | ||
1563 | if (!drv || !drv->bdrv_media_changed) | |
1564 | ret = -ENOTSUP; | |
1565 | else | |
1566 | ret = drv->bdrv_media_changed(bs); | |
1567 | if (ret == -ENOTSUP) | |
1568 | ret = bs->media_changed; | |
1569 | bs->media_changed = 0; | |
1570 | return ret; | |
1571 | } | |
1572 | ||
1573 | /** | |
1574 | * If eject_flag is TRUE, eject the media. Otherwise, close the tray | |
1575 | */ | |
aea2a33c | 1576 | int bdrv_eject(BlockDriverState *bs, int eject_flag) |
19cb3738 FB |
1577 | { |
1578 | BlockDriver *drv = bs->drv; | |
1579 | int ret; | |
1580 | ||
aea2a33c MM |
1581 | if (bs->locked) { |
1582 | return -EBUSY; | |
1583 | } | |
1584 | ||
19cb3738 FB |
1585 | if (!drv || !drv->bdrv_eject) { |
1586 | ret = -ENOTSUP; | |
1587 | } else { | |
1588 | ret = drv->bdrv_eject(bs, eject_flag); | |
1589 | } | |
1590 | if (ret == -ENOTSUP) { | |
1591 | if (eject_flag) | |
1592 | bdrv_close(bs); | |
aea2a33c | 1593 | ret = 0; |
19cb3738 | 1594 | } |
aea2a33c MM |
1595 | |
1596 | return ret; | |
19cb3738 FB |
1597 | } |
1598 | ||
1599 | int bdrv_is_locked(BlockDriverState *bs) | |
1600 | { | |
1601 | return bs->locked; | |
1602 | } | |
1603 | ||
1604 | /** | |
1605 | * Lock or unlock the media (if it is locked, the user won't be able | |
1606 | * to eject it manually). | |
1607 | */ | |
1608 | void bdrv_set_locked(BlockDriverState *bs, int locked) | |
1609 | { | |
1610 | BlockDriver *drv = bs->drv; | |
1611 | ||
1612 | bs->locked = locked; | |
1613 | if (drv && drv->bdrv_set_locked) { | |
1614 | drv->bdrv_set_locked(bs, locked); | |
1615 | } | |
1616 | } | |
985a03b0 TS |
1617 | |
1618 | /* needed for generic scsi interface */ | |
1619 | ||
1620 | int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) | |
1621 | { | |
1622 | BlockDriver *drv = bs->drv; | |
1623 | ||
1624 | if (drv && drv->bdrv_ioctl) | |
1625 | return drv->bdrv_ioctl(bs, req, buf); | |
1626 | return -ENOTSUP; | |
1627 | } | |
7d780669 | 1628 | |
221f715d AL |
1629 | BlockDriverAIOCB *bdrv_aio_ioctl(BlockDriverState *bs, |
1630 | unsigned long int req, void *buf, | |
1631 | BlockDriverCompletionFunc *cb, void *opaque) | |
7d780669 | 1632 | { |
221f715d | 1633 | BlockDriver *drv = bs->drv; |
7d780669 | 1634 | |
221f715d AL |
1635 | if (drv && drv->bdrv_aio_ioctl) |
1636 | return drv->bdrv_aio_ioctl(bs, req, buf, cb, opaque); | |
1637 | return NULL; | |
7d780669 | 1638 | } |
e268ca52 AL |
1639 | |
1640 | void *qemu_blockalign(BlockDriverState *bs, size_t size) | |
1641 | { | |
1642 | return qemu_memalign((bs && bs->buffer_alignment) ? bs->buffer_alignment : 512, size); | |
1643 | } |