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2e6fc7eb | 1 | /* BlockDriver implementation for "raw" format driver |
e1c66c6d | 2 | * |
ad82be2f | 3 | * Copyright (C) 2010-2016 Red Hat, Inc. |
ff369a48 | 4 | * Copyright (C) 2010, Blue Swirl <blauwirbel@gmail.com> |
775d6afd | 5 | * Copyright (C) 2009, Anthony Liguori <aliguori@us.ibm.com> |
e1c66c6d LE |
6 | * |
7 | * Author: | |
8 | * Laszlo Ersek <lersek@redhat.com> | |
9 | * | |
10 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
11 | * of this software and associated documentation files (the "Software"), to | |
12 | * deal in the Software without restriction, including without limitation the | |
13 | * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or | |
14 | * sell copies of the Software, and to permit persons to whom the Software is | |
15 | * furnished to do so, subject to the following conditions: | |
16 | * | |
17 | * The above copyright notice and this permission notice shall be included in | |
18 | * all copies or substantial portions of the Software. | |
19 | * | |
20 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
21 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
22 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
23 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
24 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
25 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS | |
26 | * IN THE SOFTWARE. | |
27 | */ | |
28 | ||
80c71a24 | 29 | #include "qemu/osdep.h" |
e1c66c6d | 30 | #include "block/block_int.h" |
da34e65c | 31 | #include "qapi/error.h" |
0b8fa32f | 32 | #include "qemu/module.h" |
ff369a48 LE |
33 | #include "qemu/option.h" |
34 | ||
2fdc7045 TG |
35 | typedef struct BDRVRawState { |
36 | uint64_t offset; | |
37 | uint64_t size; | |
38 | bool has_size; | |
39 | } BDRVRawState; | |
40 | ||
8a2ce0bc AG |
41 | static const char *const mutable_opts[] = { "offset", "size", NULL }; |
42 | ||
2fdc7045 TG |
43 | static QemuOptsList raw_runtime_opts = { |
44 | .name = "raw", | |
45 | .head = QTAILQ_HEAD_INITIALIZER(raw_runtime_opts.head), | |
46 | .desc = { | |
47 | { | |
48 | .name = "offset", | |
49 | .type = QEMU_OPT_SIZE, | |
50 | .help = "offset in the disk where the image starts", | |
51 | }, | |
52 | { | |
53 | .name = "size", | |
54 | .type = QEMU_OPT_SIZE, | |
55 | .help = "virtual disk size", | |
56 | }, | |
57 | { /* end of list */ } | |
58 | }, | |
59 | }; | |
60 | ||
cd3a4cf6 CL |
61 | static QemuOptsList raw_create_opts = { |
62 | .name = "raw-create-opts", | |
63 | .head = QTAILQ_HEAD_INITIALIZER(raw_create_opts.head), | |
64 | .desc = { | |
65 | { | |
66 | .name = BLOCK_OPT_SIZE, | |
67 | .type = QEMU_OPT_SIZE, | |
68 | .help = "Virtual disk size" | |
69 | }, | |
70 | { /* end of list */ } | |
71 | } | |
ff369a48 | 72 | }; |
e1c66c6d | 73 | |
500e2434 HR |
74 | static int raw_read_options(QDict *options, uint64_t *offset, bool *has_size, |
75 | uint64_t *size, Error **errp) | |
2fdc7045 | 76 | { |
2fdc7045 | 77 | QemuOpts *opts = NULL; |
2fdc7045 TG |
78 | int ret; |
79 | ||
2fdc7045 | 80 | opts = qemu_opts_create(&raw_runtime_opts, NULL, 0, &error_abort); |
af175e85 | 81 | if (!qemu_opts_absorb_qdict(opts, options, errp)) { |
2fdc7045 TG |
82 | ret = -EINVAL; |
83 | goto end; | |
84 | } | |
85 | ||
500e2434 HR |
86 | *offset = qemu_opt_get_size(opts, "offset", 0); |
87 | *has_size = qemu_opt_find(opts, "size"); | |
88 | *size = qemu_opt_get_size(opts, "size", 0); | |
40332872 | 89 | |
500e2434 HR |
90 | ret = 0; |
91 | end: | |
92 | qemu_opts_del(opts); | |
93 | return ret; | |
94 | } | |
95 | ||
96 | static int raw_apply_options(BlockDriverState *bs, BDRVRawState *s, | |
97 | uint64_t offset, bool has_size, uint64_t size, | |
98 | Error **errp) | |
99 | { | |
100 | int64_t real_size = 0; | |
101 | ||
102 | real_size = bdrv_getlength(bs->file->bs); | |
103 | if (real_size < 0) { | |
104 | error_setg_errno(errp, -real_size, "Could not get image size"); | |
105 | return real_size; | |
2fdc7045 TG |
106 | } |
107 | ||
108 | /* Check size and offset */ | |
500e2434 HR |
109 | if (offset > real_size) { |
110 | error_setg(errp, "Offset (%" PRIu64 ") cannot be greater than " | |
111 | "size of the containing file (%" PRId64 ")", | |
112 | s->offset, real_size); | |
113 | return -EINVAL; | |
114 | } | |
115 | ||
116 | if (has_size && (real_size - offset) < size) { | |
2fdc7045 | 117 | error_setg(errp, "The sum of offset (%" PRIu64 ") and size " |
500e2434 HR |
118 | "(%" PRIu64 ") has to be smaller or equal to the " |
119 | " actual size of the containing file (%" PRId64 ")", | |
120 | s->offset, s->size, real_size); | |
121 | return -EINVAL; | |
2fdc7045 TG |
122 | } |
123 | ||
124 | /* Make sure size is multiple of BDRV_SECTOR_SIZE to prevent rounding | |
125 | * up and leaking out of the specified area. */ | |
500e2434 | 126 | if (has_size && !QEMU_IS_ALIGNED(size, BDRV_SECTOR_SIZE)) { |
2fdc7045 | 127 | error_setg(errp, "Specified size is not multiple of %llu", |
500e2434 HR |
128 | BDRV_SECTOR_SIZE); |
129 | return -EINVAL; | |
2fdc7045 TG |
130 | } |
131 | ||
500e2434 HR |
132 | s->offset = offset; |
133 | s->has_size = has_size; | |
134 | s->size = has_size ? size : real_size - offset; | |
2fdc7045 | 135 | |
500e2434 | 136 | return 0; |
2fdc7045 TG |
137 | } |
138 | ||
7a6d3fc5 LE |
139 | static int raw_reopen_prepare(BDRVReopenState *reopen_state, |
140 | BlockReopenQueue *queue, Error **errp) | |
e1c66c6d | 141 | { |
500e2434 HR |
142 | bool has_size; |
143 | uint64_t offset, size; | |
144 | int ret; | |
145 | ||
2fdc7045 TG |
146 | assert(reopen_state != NULL); |
147 | assert(reopen_state->bs != NULL); | |
148 | ||
149 | reopen_state->opaque = g_new0(BDRVRawState, 1); | |
150 | ||
500e2434 HR |
151 | ret = raw_read_options(reopen_state->options, &offset, &has_size, &size, |
152 | errp); | |
153 | if (ret < 0) { | |
154 | return ret; | |
155 | } | |
156 | ||
157 | ret = raw_apply_options(reopen_state->bs, reopen_state->opaque, | |
158 | offset, has_size, size, errp); | |
159 | if (ret < 0) { | |
160 | return ret; | |
161 | } | |
162 | ||
163 | return 0; | |
2fdc7045 TG |
164 | } |
165 | ||
166 | static void raw_reopen_commit(BDRVReopenState *state) | |
167 | { | |
168 | BDRVRawState *new_s = state->opaque; | |
169 | BDRVRawState *s = state->bs->opaque; | |
170 | ||
171 | memcpy(s, new_s, sizeof(BDRVRawState)); | |
172 | ||
173 | g_free(state->opaque); | |
174 | state->opaque = NULL; | |
175 | } | |
176 | ||
177 | static void raw_reopen_abort(BDRVReopenState *state) | |
178 | { | |
179 | g_free(state->opaque); | |
180 | state->opaque = NULL; | |
e1c66c6d LE |
181 | } |
182 | ||
38445538 FZ |
183 | /* Check and adjust the offset, against 'offset' and 'size' options. */ |
184 | static inline int raw_adjust_offset(BlockDriverState *bs, uint64_t *offset, | |
185 | uint64_t bytes, bool is_write) | |
186 | { | |
187 | BDRVRawState *s = bs->opaque; | |
188 | ||
189 | if (s->has_size && (*offset > s->size || bytes > (s->size - *offset))) { | |
190 | /* There's not enough space for the write, or the read request is | |
191 | * out-of-range. Don't read/write anything to prevent leaking out of | |
192 | * the size specified in options. */ | |
6d6bcc46 | 193 | return is_write ? -ENOSPC : -EINVAL; |
38445538 FZ |
194 | } |
195 | ||
196 | if (*offset > INT64_MAX - s->offset) { | |
197 | return -EINVAL; | |
198 | } | |
199 | *offset += s->offset; | |
200 | ||
201 | return 0; | |
202 | } | |
203 | ||
decaeed7 EB |
204 | static int coroutine_fn raw_co_preadv(BlockDriverState *bs, uint64_t offset, |
205 | uint64_t bytes, QEMUIOVector *qiov, | |
206 | int flags) | |
e1c66c6d | 207 | { |
38445538 | 208 | int ret; |
2fdc7045 | 209 | |
38445538 FZ |
210 | ret = raw_adjust_offset(bs, &offset, bytes, false); |
211 | if (ret) { | |
212 | return ret; | |
2fdc7045 | 213 | } |
2fdc7045 | 214 | |
9eaafd90 | 215 | BLKDBG_EVENT(bs->file, BLKDBG_READ_AIO); |
decaeed7 | 216 | return bdrv_co_preadv(bs->file, offset, bytes, qiov, flags); |
e1c66c6d LE |
217 | } |
218 | ||
decaeed7 EB |
219 | static int coroutine_fn raw_co_pwritev(BlockDriverState *bs, uint64_t offset, |
220 | uint64_t bytes, QEMUIOVector *qiov, | |
221 | int flags) | |
e1c66c6d | 222 | { |
38f3ef57 KW |
223 | void *buf = NULL; |
224 | BlockDriver *drv; | |
225 | QEMUIOVector local_qiov; | |
226 | int ret; | |
227 | ||
decaeed7 EB |
228 | if (bs->probed && offset < BLOCK_PROBE_BUF_SIZE && bytes) { |
229 | /* Handling partial writes would be a pain - so we just | |
230 | * require that guests have 512-byte request alignment if | |
231 | * probing occurred */ | |
38f3ef57 KW |
232 | QEMU_BUILD_BUG_ON(BLOCK_PROBE_BUF_SIZE != 512); |
233 | QEMU_BUILD_BUG_ON(BDRV_SECTOR_SIZE != 512); | |
decaeed7 | 234 | assert(offset == 0 && bytes >= BLOCK_PROBE_BUF_SIZE); |
38f3ef57 | 235 | |
9a4f4c31 | 236 | buf = qemu_try_blockalign(bs->file->bs, 512); |
38f3ef57 KW |
237 | if (!buf) { |
238 | ret = -ENOMEM; | |
239 | goto fail; | |
240 | } | |
241 | ||
242 | ret = qemu_iovec_to_buf(qiov, 0, buf, 512); | |
243 | if (ret != 512) { | |
244 | ret = -EINVAL; | |
245 | goto fail; | |
246 | } | |
247 | ||
248 | drv = bdrv_probe_all(buf, 512, NULL); | |
249 | if (drv != bs->drv) { | |
250 | ret = -EPERM; | |
251 | goto fail; | |
252 | } | |
253 | ||
254 | /* Use the checked buffer, a malicious guest might be overwriting its | |
255 | * original buffer in the background. */ | |
256 | qemu_iovec_init(&local_qiov, qiov->niov + 1); | |
257 | qemu_iovec_add(&local_qiov, buf, 512); | |
258 | qemu_iovec_concat(&local_qiov, qiov, 512, qiov->size - 512); | |
259 | qiov = &local_qiov; | |
260 | } | |
261 | ||
38445538 FZ |
262 | ret = raw_adjust_offset(bs, &offset, bytes, true); |
263 | if (ret) { | |
264 | goto fail; | |
265 | } | |
2fdc7045 | 266 | |
9eaafd90 | 267 | BLKDBG_EVENT(bs->file, BLKDBG_WRITE_AIO); |
decaeed7 | 268 | ret = bdrv_co_pwritev(bs->file, offset, bytes, qiov, flags); |
38f3ef57 KW |
269 | |
270 | fail: | |
271 | if (qiov == &local_qiov) { | |
272 | qemu_iovec_destroy(&local_qiov); | |
273 | } | |
274 | qemu_vfree(buf); | |
275 | return ret; | |
e1c66c6d LE |
276 | } |
277 | ||
d41aa7e3 EB |
278 | static int coroutine_fn raw_co_block_status(BlockDriverState *bs, |
279 | bool want_zero, int64_t offset, | |
280 | int64_t bytes, int64_t *pnum, | |
281 | int64_t *map, | |
67a0fd2a | 282 | BlockDriverState **file) |
e1c66c6d | 283 | { |
2fdc7045 | 284 | BDRVRawState *s = bs->opaque; |
d41aa7e3 | 285 | *pnum = bytes; |
02650acb | 286 | *file = bs->file->bs; |
d41aa7e3 EB |
287 | *map = offset + s->offset; |
288 | return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID; | |
e1c66c6d LE |
289 | } |
290 | ||
39ad937e | 291 | static int coroutine_fn raw_co_pwrite_zeroes(BlockDriverState *bs, |
f5a5ca79 | 292 | int64_t offset, int bytes, |
39ad937e | 293 | BdrvRequestFlags flags) |
e1c66c6d | 294 | { |
38445538 FZ |
295 | int ret; |
296 | ||
297 | ret = raw_adjust_offset(bs, (uint64_t *)&offset, bytes, true); | |
298 | if (ret) { | |
299 | return ret; | |
2fdc7045 | 300 | } |
f5a5ca79 | 301 | return bdrv_co_pwrite_zeroes(bs->file, offset, bytes, flags); |
e1c66c6d LE |
302 | } |
303 | ||
5f61ad07 | 304 | static int coroutine_fn raw_co_pdiscard(BlockDriverState *bs, |
f5a5ca79 | 305 | int64_t offset, int bytes) |
e1c66c6d | 306 | { |
38445538 FZ |
307 | int ret; |
308 | ||
309 | ret = raw_adjust_offset(bs, (uint64_t *)&offset, bytes, true); | |
310 | if (ret) { | |
311 | return ret; | |
2fdc7045 | 312 | } |
0b9fd3f4 | 313 | return bdrv_co_pdiscard(bs->file, offset, bytes); |
e1c66c6d LE |
314 | } |
315 | ||
7a6d3fc5 | 316 | static int64_t raw_getlength(BlockDriverState *bs) |
e1c66c6d | 317 | { |
2fdc7045 TG |
318 | int64_t len; |
319 | BDRVRawState *s = bs->opaque; | |
320 | ||
321 | /* Update size. It should not change unless the file was externally | |
322 | * modified. */ | |
323 | len = bdrv_getlength(bs->file->bs); | |
324 | if (len < 0) { | |
325 | return len; | |
326 | } | |
327 | ||
328 | if (len < s->offset) { | |
329 | s->size = 0; | |
330 | } else { | |
331 | if (s->has_size) { | |
332 | /* Try to honour the size */ | |
333 | s->size = MIN(s->size, len - s->offset); | |
334 | } else { | |
335 | s->size = len - s->offset; | |
336 | } | |
337 | } | |
338 | ||
339 | return s->size; | |
e1c66c6d LE |
340 | } |
341 | ||
a843a22a SH |
342 | static BlockMeasureInfo *raw_measure(QemuOpts *opts, BlockDriverState *in_bs, |
343 | Error **errp) | |
344 | { | |
345 | BlockMeasureInfo *info; | |
346 | int64_t required; | |
347 | ||
348 | if (in_bs) { | |
349 | required = bdrv_getlength(in_bs); | |
350 | if (required < 0) { | |
351 | error_setg_errno(errp, -required, "Unable to get image size"); | |
352 | return NULL; | |
353 | } | |
354 | } else { | |
355 | required = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), | |
356 | BDRV_SECTOR_SIZE); | |
357 | } | |
358 | ||
5d72c68b | 359 | info = g_new0(BlockMeasureInfo, 1); |
a843a22a SH |
360 | info->required = required; |
361 | ||
362 | /* Unallocated sectors count towards the file size in raw images */ | |
363 | info->fully_allocated = info->required; | |
364 | return info; | |
365 | } | |
366 | ||
7a6d3fc5 | 367 | static int raw_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) |
e1c66c6d | 368 | { |
9a4f4c31 | 369 | return bdrv_get_info(bs->file->bs, bdi); |
e1c66c6d LE |
370 | } |
371 | ||
decaeed7 EB |
372 | static void raw_refresh_limits(BlockDriverState *bs, Error **errp) |
373 | { | |
374 | if (bs->probed) { | |
375 | /* To make it easier to protect the first sector, any probed | |
376 | * image is restricted to read-modify-write on sub-sector | |
377 | * operations. */ | |
378 | bs->bl.request_alignment = BDRV_SECTOR_SIZE; | |
379 | } | |
380 | } | |
381 | ||
061ca8a3 | 382 | static int coroutine_fn raw_co_truncate(BlockDriverState *bs, int64_t offset, |
c80d8b06 | 383 | bool exact, PreallocMode prealloc, |
92b92799 | 384 | BdrvRequestFlags flags, Error **errp) |
e1c66c6d | 385 | { |
2fdc7045 TG |
386 | BDRVRawState *s = bs->opaque; |
387 | ||
388 | if (s->has_size) { | |
f59adb32 | 389 | error_setg(errp, "Cannot resize fixed-size raw disks"); |
2fdc7045 TG |
390 | return -ENOTSUP; |
391 | } | |
392 | ||
393 | if (INT64_MAX - offset < s->offset) { | |
f59adb32 | 394 | error_setg(errp, "Disk size too large for the chosen offset"); |
2fdc7045 TG |
395 | return -EINVAL; |
396 | } | |
397 | ||
398 | s->size = offset; | |
399 | offset += s->offset; | |
1ddaabae | 400 | return bdrv_co_truncate(bs->file, offset, exact, prealloc, flags, errp); |
e1c66c6d LE |
401 | } |
402 | ||
7a6d3fc5 | 403 | static void raw_eject(BlockDriverState *bs, bool eject_flag) |
e1c66c6d | 404 | { |
9a4f4c31 | 405 | bdrv_eject(bs->file->bs, eject_flag); |
e1c66c6d LE |
406 | } |
407 | ||
7a6d3fc5 | 408 | static void raw_lock_medium(BlockDriverState *bs, bool locked) |
e1c66c6d | 409 | { |
9a4f4c31 | 410 | bdrv_lock_medium(bs->file->bs, locked); |
e1c66c6d LE |
411 | } |
412 | ||
151a2930 | 413 | static int raw_co_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
e1c66c6d | 414 | { |
2fdc7045 TG |
415 | BDRVRawState *s = bs->opaque; |
416 | if (s->offset || s->has_size) { | |
417 | return -ENOTSUP; | |
418 | } | |
151a2930 | 419 | return bdrv_co_ioctl(bs->file->bs, req, buf); |
e1c66c6d LE |
420 | } |
421 | ||
7a6d3fc5 | 422 | static int raw_has_zero_init(BlockDriverState *bs) |
e1c66c6d | 423 | { |
9a4f4c31 | 424 | return bdrv_has_zero_init(bs->file->bs); |
e1c66c6d LE |
425 | } |
426 | ||
b92902df ML |
427 | static int coroutine_fn raw_co_create_opts(BlockDriver *drv, |
428 | const char *filename, | |
429 | QemuOpts *opts, | |
efc75e2a | 430 | Error **errp) |
1565262c | 431 | { |
9be38598 | 432 | return bdrv_create_file(filename, opts, errp); |
1565262c | 433 | } |
01dd96d8 | 434 | |
015a1036 HR |
435 | static int raw_open(BlockDriverState *bs, QDict *options, int flags, |
436 | Error **errp) | |
01dd96d8 | 437 | { |
2fdc7045 | 438 | BDRVRawState *s = bs->opaque; |
500e2434 HR |
439 | bool has_size; |
440 | uint64_t offset, size; | |
58944401 | 441 | BdrvChildRole file_role; |
2fdc7045 TG |
442 | int ret; |
443 | ||
500e2434 HR |
444 | ret = raw_read_options(options, &offset, &has_size, &size, errp); |
445 | if (ret < 0) { | |
446 | return ret; | |
447 | } | |
448 | ||
58944401 HR |
449 | /* |
450 | * Without offset and a size limit, this driver behaves very much | |
451 | * like a filter. With any such limit, it does not. | |
452 | */ | |
453 | if (offset || has_size) { | |
454 | file_role = BDRV_CHILD_DATA | BDRV_CHILD_PRIMARY; | |
455 | } else { | |
456 | file_role = BDRV_CHILD_FILTERED | BDRV_CHILD_PRIMARY; | |
457 | } | |
458 | ||
459 | bs->file = bdrv_open_child(NULL, options, "file", bs, &child_of_bds, | |
460 | file_role, false, errp); | |
4e4bf5c4 KW |
461 | if (!bs->file) { |
462 | return -EINVAL; | |
463 | } | |
464 | ||
9a4f4c31 | 465 | bs->sg = bs->file->bs->sg; |
228345bf HR |
466 | bs->supported_write_flags = BDRV_REQ_WRITE_UNCHANGED | |
467 | (BDRV_REQ_FUA & bs->file->bs->supported_write_flags); | |
468 | bs->supported_zero_flags = BDRV_REQ_WRITE_UNCHANGED | | |
80f5c33f | 469 | ((BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP | BDRV_REQ_NO_FALLBACK) & |
228345bf | 470 | bs->file->bs->supported_zero_flags); |
1ddaabae KW |
471 | bs->supported_truncate_flags = bs->file->bs->supported_truncate_flags & |
472 | BDRV_REQ_ZERO_WRITE; | |
38f3ef57 KW |
473 | |
474 | if (bs->probed && !bdrv_is_read_only(bs)) { | |
f30c66ba | 475 | bdrv_refresh_filename(bs->file->bs); |
38f3ef57 KW |
476 | fprintf(stderr, |
477 | "WARNING: Image format was not specified for '%s' and probing " | |
478 | "guessed raw.\n" | |
479 | " Automatically detecting the format is dangerous for " | |
480 | "raw images, write operations on block 0 will be restricted.\n" | |
481 | " Specify the 'raw' format explicitly to remove the " | |
482 | "restrictions.\n", | |
9a4f4c31 | 483 | bs->file->bs->filename); |
38f3ef57 KW |
484 | } |
485 | ||
500e2434 | 486 | ret = raw_apply_options(bs, s, offset, has_size, size, errp); |
2fdc7045 TG |
487 | if (ret < 0) { |
488 | return ret; | |
489 | } | |
490 | ||
491 | if (bs->sg && (s->offset || s->has_size)) { | |
492 | error_setg(errp, "Cannot use offset/size with SCSI generic devices"); | |
493 | return -EINVAL; | |
494 | } | |
495 | ||
01dd96d8 LE |
496 | return 0; |
497 | } | |
498 | ||
7a6d3fc5 | 499 | static int raw_probe(const uint8_t *buf, int buf_size, const char *filename) |
01dd96d8 LE |
500 | { |
501 | /* smallest possible positive score so that raw is used if and only if no | |
502 | * other block driver works | |
503 | */ | |
504 | return 1; | |
505 | } | |
775d6afd | 506 | |
1a9335e4 ET |
507 | static int raw_probe_blocksizes(BlockDriverState *bs, BlockSizes *bsz) |
508 | { | |
2fdc7045 TG |
509 | BDRVRawState *s = bs->opaque; |
510 | int ret; | |
511 | ||
512 | ret = bdrv_probe_blocksizes(bs->file->bs, bsz); | |
513 | if (ret < 0) { | |
514 | return ret; | |
515 | } | |
516 | ||
517 | if (!QEMU_IS_ALIGNED(s->offset, MAX(bsz->log, bsz->phys))) { | |
518 | return -ENOTSUP; | |
519 | } | |
520 | ||
521 | return 0; | |
1a9335e4 ET |
522 | } |
523 | ||
524 | static int raw_probe_geometry(BlockDriverState *bs, HDGeometry *geo) | |
525 | { | |
2fdc7045 TG |
526 | BDRVRawState *s = bs->opaque; |
527 | if (s->offset || s->has_size) { | |
528 | return -ENOTSUP; | |
529 | } | |
9a4f4c31 | 530 | return bdrv_probe_geometry(bs->file->bs, geo); |
1a9335e4 ET |
531 | } |
532 | ||
72d219e2 | 533 | static int coroutine_fn raw_co_copy_range_from(BlockDriverState *bs, |
67b51fb9 VSO |
534 | BdrvChild *src, |
535 | uint64_t src_offset, | |
536 | BdrvChild *dst, | |
537 | uint64_t dst_offset, | |
538 | uint64_t bytes, | |
539 | BdrvRequestFlags read_flags, | |
540 | BdrvRequestFlags write_flags) | |
72d219e2 FZ |
541 | { |
542 | int ret; | |
543 | ||
544 | ret = raw_adjust_offset(bs, &src_offset, bytes, false); | |
545 | if (ret) { | |
546 | return ret; | |
547 | } | |
548 | return bdrv_co_copy_range_from(bs->file, src_offset, dst, dst_offset, | |
67b51fb9 | 549 | bytes, read_flags, write_flags); |
72d219e2 FZ |
550 | } |
551 | ||
552 | static int coroutine_fn raw_co_copy_range_to(BlockDriverState *bs, | |
67b51fb9 VSO |
553 | BdrvChild *src, |
554 | uint64_t src_offset, | |
555 | BdrvChild *dst, | |
556 | uint64_t dst_offset, | |
557 | uint64_t bytes, | |
558 | BdrvRequestFlags read_flags, | |
559 | BdrvRequestFlags write_flags) | |
72d219e2 FZ |
560 | { |
561 | int ret; | |
562 | ||
563 | ret = raw_adjust_offset(bs, &dst_offset, bytes, true); | |
564 | if (ret) { | |
565 | return ret; | |
566 | } | |
567 | return bdrv_co_copy_range_to(src, src_offset, bs->file, dst_offset, bytes, | |
67b51fb9 | 568 | read_flags, write_flags); |
72d219e2 FZ |
569 | } |
570 | ||
2654267c HR |
571 | static const char *const raw_strong_runtime_opts[] = { |
572 | "offset", | |
573 | "size", | |
574 | ||
575 | NULL | |
576 | }; | |
577 | ||
5f535a94 | 578 | BlockDriver bdrv_raw = { |
775d6afd | 579 | .format_name = "raw", |
2fdc7045 | 580 | .instance_size = sizeof(BDRVRawState), |
775d6afd LE |
581 | .bdrv_probe = &raw_probe, |
582 | .bdrv_reopen_prepare = &raw_reopen_prepare, | |
2fdc7045 TG |
583 | .bdrv_reopen_commit = &raw_reopen_commit, |
584 | .bdrv_reopen_abort = &raw_reopen_abort, | |
775d6afd | 585 | .bdrv_open = &raw_open, |
69dca43d | 586 | .bdrv_child_perm = bdrv_default_perms, |
efc75e2a | 587 | .bdrv_co_create_opts = &raw_co_create_opts, |
decaeed7 EB |
588 | .bdrv_co_preadv = &raw_co_preadv, |
589 | .bdrv_co_pwritev = &raw_co_pwritev, | |
39ad937e | 590 | .bdrv_co_pwrite_zeroes = &raw_co_pwrite_zeroes, |
5f61ad07 | 591 | .bdrv_co_pdiscard = &raw_co_pdiscard, |
d41aa7e3 | 592 | .bdrv_co_block_status = &raw_co_block_status, |
72d219e2 FZ |
593 | .bdrv_co_copy_range_from = &raw_co_copy_range_from, |
594 | .bdrv_co_copy_range_to = &raw_co_copy_range_to, | |
061ca8a3 | 595 | .bdrv_co_truncate = &raw_co_truncate, |
775d6afd | 596 | .bdrv_getlength = &raw_getlength, |
d67066d8 | 597 | .is_format = true, |
b94a2610 | 598 | .has_variable_length = true, |
a843a22a | 599 | .bdrv_measure = &raw_measure, |
775d6afd | 600 | .bdrv_get_info = &raw_get_info, |
decaeed7 | 601 | .bdrv_refresh_limits = &raw_refresh_limits, |
1a9335e4 ET |
602 | .bdrv_probe_blocksizes = &raw_probe_blocksizes, |
603 | .bdrv_probe_geometry = &raw_probe_geometry, | |
775d6afd LE |
604 | .bdrv_eject = &raw_eject, |
605 | .bdrv_lock_medium = &raw_lock_medium, | |
151a2930 | 606 | .bdrv_co_ioctl = &raw_co_ioctl, |
cd3a4cf6 | 607 | .create_opts = &raw_create_opts, |
2654267c HR |
608 | .bdrv_has_zero_init = &raw_has_zero_init, |
609 | .strong_runtime_opts = raw_strong_runtime_opts, | |
8a2ce0bc | 610 | .mutable_opts = mutable_opts, |
775d6afd LE |
611 | }; |
612 | ||
613 | static void bdrv_raw_init(void) | |
614 | { | |
615 | bdrv_register(&bdrv_raw); | |
616 | } | |
617 | ||
618 | block_init(bdrv_raw_init); |