blob: 36e65036f075a3659656459d7922b3c34396e578 [file] [log] [blame]
Eric Blake2e6fc7e2016-12-02 13:48:53 -06001/* BlockDriver implementation for "raw" format driver
Laszlo Erseke1c66c62013-08-21 12:41:17 +02002 *
Eric Blakead82be22016-06-23 16:37:22 -06003 * Copyright (C) 2010-2016 Red Hat, Inc.
Laszlo Ersekff369a42013-08-21 12:41:21 +02004 * Copyright (C) 2010, Blue Swirl <blauwirbel@gmail.com>
Laszlo Ersek775d6af2013-08-21 12:41:22 +02005 * Copyright (C) 2009, Anthony Liguori <aliguori@us.ibm.com>
Laszlo Erseke1c66c62013-08-21 12:41:17 +02006 *
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
Peter Maydell80c71a22016-01-18 18:01:42 +000029#include "qemu/osdep.h"
Laszlo Erseke1c66c62013-08-21 12:41:17 +020030#include "block/block_int.h"
Markus Armbrusterda34e652016-03-14 09:01:28 +010031#include "qapi/error.h"
Laszlo Ersekff369a42013-08-21 12:41:21 +020032#include "qemu/option.h"
33
Tomáš Golembiovský2fdc7042016-10-31 11:27:40 +010034typedef struct BDRVRawState {
35 uint64_t offset;
36 uint64_t size;
37 bool has_size;
38} BDRVRawState;
39
40static QemuOptsList raw_runtime_opts = {
41 .name = "raw",
42 .head = QTAILQ_HEAD_INITIALIZER(raw_runtime_opts.head),
43 .desc = {
44 {
45 .name = "offset",
46 .type = QEMU_OPT_SIZE,
47 .help = "offset in the disk where the image starts",
48 },
49 {
50 .name = "size",
51 .type = QEMU_OPT_SIZE,
52 .help = "virtual disk size",
53 },
54 { /* end of list */ }
55 },
56};
57
Chunyan Liucd3a4cf2014-06-05 17:21:03 +080058static QemuOptsList raw_create_opts = {
59 .name = "raw-create-opts",
60 .head = QTAILQ_HEAD_INITIALIZER(raw_create_opts.head),
61 .desc = {
62 {
63 .name = BLOCK_OPT_SIZE,
64 .type = QEMU_OPT_SIZE,
65 .help = "Virtual disk size"
66 },
67 { /* end of list */ }
68 }
Laszlo Ersekff369a42013-08-21 12:41:21 +020069};
Laszlo Erseke1c66c62013-08-21 12:41:17 +020070
Tomáš Golembiovský2fdc7042016-10-31 11:27:40 +010071static int raw_read_options(QDict *options, BlockDriverState *bs,
72 BDRVRawState *s, Error **errp)
73{
74 Error *local_err = NULL;
75 QemuOpts *opts = NULL;
76 int64_t real_size = 0;
77 int ret;
78
79 real_size = bdrv_getlength(bs->file->bs);
80 if (real_size < 0) {
81 error_setg_errno(errp, -real_size, "Could not get image size");
82 return real_size;
83 }
84
85 opts = qemu_opts_create(&raw_runtime_opts, NULL, 0, &error_abort);
86 qemu_opts_absorb_qdict(opts, options, &local_err);
87 if (local_err) {
88 error_propagate(errp, local_err);
89 ret = -EINVAL;
90 goto end;
91 }
92
93 s->offset = qemu_opt_get_size(opts, "offset", 0);
Tomáš Golembiovský40332872016-11-03 14:47:48 +010094 if (s->offset > real_size) {
95 error_setg(errp, "Offset (%" PRIu64 ") cannot be greater than "
96 "size of the containing file (%" PRId64 ")",
97 s->offset, real_size);
98 ret = -EINVAL;
99 goto end;
100 }
101
Tomáš Golembiovský2fdc7042016-10-31 11:27:40 +0100102 if (qemu_opt_find(opts, "size") != NULL) {
103 s->size = qemu_opt_get_size(opts, "size", 0);
104 s->has_size = true;
105 } else {
106 s->has_size = false;
107 s->size = real_size - s->offset;
108 }
109
110 /* Check size and offset */
Tomáš Golembiovský40332872016-11-03 14:47:48 +0100111 if ((real_size - s->offset) < s->size) {
Tomáš Golembiovský2fdc7042016-10-31 11:27:40 +0100112 error_setg(errp, "The sum of offset (%" PRIu64 ") and size "
113 "(%" PRIu64 ") has to be smaller or equal to the "
114 " actual size of the containing file (%" PRId64 ")",
115 s->offset, s->size, real_size);
116 ret = -EINVAL;
117 goto end;
118 }
119
120 /* Make sure size is multiple of BDRV_SECTOR_SIZE to prevent rounding
121 * up and leaking out of the specified area. */
Tomáš Golembiovský80a15e32016-11-03 14:47:49 +0100122 if (s->has_size && !QEMU_IS_ALIGNED(s->size, BDRV_SECTOR_SIZE)) {
Tomáš Golembiovský2fdc7042016-10-31 11:27:40 +0100123 error_setg(errp, "Specified size is not multiple of %llu",
124 BDRV_SECTOR_SIZE);
125 ret = -EINVAL;
126 goto end;
127 }
128
129 ret = 0;
130
131end:
132
133 qemu_opts_del(opts);
134
135 return ret;
136}
137
Laszlo Ersek7a6d3fc2013-08-21 12:41:23 +0200138static int raw_reopen_prepare(BDRVReopenState *reopen_state,
139 BlockReopenQueue *queue, Error **errp)
Laszlo Erseke1c66c62013-08-21 12:41:17 +0200140{
Tomáš Golembiovský2fdc7042016-10-31 11:27:40 +0100141 assert(reopen_state != NULL);
142 assert(reopen_state->bs != NULL);
143
144 reopen_state->opaque = g_new0(BDRVRawState, 1);
145
146 return raw_read_options(
147 reopen_state->options,
148 reopen_state->bs,
149 reopen_state->opaque,
150 errp);
151}
152
153static void raw_reopen_commit(BDRVReopenState *state)
154{
155 BDRVRawState *new_s = state->opaque;
156 BDRVRawState *s = state->bs->opaque;
157
158 memcpy(s, new_s, sizeof(BDRVRawState));
159
160 g_free(state->opaque);
161 state->opaque = NULL;
162}
163
164static void raw_reopen_abort(BDRVReopenState *state)
165{
166 g_free(state->opaque);
167 state->opaque = NULL;
Laszlo Erseke1c66c62013-08-21 12:41:17 +0200168}
169
Eric Blakedecaeed2016-07-15 17:23:08 -0600170static int coroutine_fn raw_co_preadv(BlockDriverState *bs, uint64_t offset,
171 uint64_t bytes, QEMUIOVector *qiov,
172 int flags)
Laszlo Erseke1c66c62013-08-21 12:41:17 +0200173{
Tomáš Golembiovský2fdc7042016-10-31 11:27:40 +0100174 BDRVRawState *s = bs->opaque;
175
176 if (offset > UINT64_MAX - s->offset) {
177 return -EINVAL;
178 }
179 offset += s->offset;
180
Laszlo Ersek9eaafd92013-08-21 12:41:18 +0200181 BLKDBG_EVENT(bs->file, BLKDBG_READ_AIO);
Eric Blakedecaeed2016-07-15 17:23:08 -0600182 return bdrv_co_preadv(bs->file, offset, bytes, qiov, flags);
Laszlo Erseke1c66c62013-08-21 12:41:17 +0200183}
184
Eric Blakedecaeed2016-07-15 17:23:08 -0600185static int coroutine_fn raw_co_pwritev(BlockDriverState *bs, uint64_t offset,
186 uint64_t bytes, QEMUIOVector *qiov,
187 int flags)
Laszlo Erseke1c66c62013-08-21 12:41:17 +0200188{
Tomáš Golembiovský2fdc7042016-10-31 11:27:40 +0100189 BDRVRawState *s = bs->opaque;
Kevin Wolf38f3ef52014-11-20 16:27:12 +0100190 void *buf = NULL;
191 BlockDriver *drv;
192 QEMUIOVector local_qiov;
193 int ret;
194
Tomáš Golembiovský2fdc7042016-10-31 11:27:40 +0100195 if (s->has_size && (offset > s->size || bytes > (s->size - offset))) {
196 /* There's not enough space for the data. Don't write anything and just
197 * fail to prevent leaking out of the size specified in options. */
198 return -ENOSPC;
199 }
200
201 if (offset > UINT64_MAX - s->offset) {
202 ret = -EINVAL;
203 goto fail;
204 }
205
Eric Blakedecaeed2016-07-15 17:23:08 -0600206 if (bs->probed && offset < BLOCK_PROBE_BUF_SIZE && bytes) {
207 /* Handling partial writes would be a pain - so we just
208 * require that guests have 512-byte request alignment if
209 * probing occurred */
Kevin Wolf38f3ef52014-11-20 16:27:12 +0100210 QEMU_BUILD_BUG_ON(BLOCK_PROBE_BUF_SIZE != 512);
211 QEMU_BUILD_BUG_ON(BDRV_SECTOR_SIZE != 512);
Eric Blakedecaeed2016-07-15 17:23:08 -0600212 assert(offset == 0 && bytes >= BLOCK_PROBE_BUF_SIZE);
Kevin Wolf38f3ef52014-11-20 16:27:12 +0100213
Kevin Wolf9a4f4c32015-06-16 14:19:22 +0200214 buf = qemu_try_blockalign(bs->file->bs, 512);
Kevin Wolf38f3ef52014-11-20 16:27:12 +0100215 if (!buf) {
216 ret = -ENOMEM;
217 goto fail;
218 }
219
220 ret = qemu_iovec_to_buf(qiov, 0, buf, 512);
221 if (ret != 512) {
222 ret = -EINVAL;
223 goto fail;
224 }
225
226 drv = bdrv_probe_all(buf, 512, NULL);
227 if (drv != bs->drv) {
228 ret = -EPERM;
229 goto fail;
230 }
231
232 /* Use the checked buffer, a malicious guest might be overwriting its
233 * original buffer in the background. */
234 qemu_iovec_init(&local_qiov, qiov->niov + 1);
235 qemu_iovec_add(&local_qiov, buf, 512);
236 qemu_iovec_concat(&local_qiov, qiov, 512, qiov->size - 512);
237 qiov = &local_qiov;
238 }
239
Tomáš Golembiovský2fdc7042016-10-31 11:27:40 +0100240 offset += s->offset;
241
Laszlo Ersek9eaafd92013-08-21 12:41:18 +0200242 BLKDBG_EVENT(bs->file, BLKDBG_WRITE_AIO);
Eric Blakedecaeed2016-07-15 17:23:08 -0600243 ret = bdrv_co_pwritev(bs->file, offset, bytes, qiov, flags);
Kevin Wolf38f3ef52014-11-20 16:27:12 +0100244
245fail:
246 if (qiov == &local_qiov) {
247 qemu_iovec_destroy(&local_qiov);
248 }
249 qemu_vfree(buf);
250 return ret;
Laszlo Erseke1c66c62013-08-21 12:41:17 +0200251}
252
Paolo Bonzinib6b8a332013-09-04 19:00:28 +0200253static int64_t coroutine_fn raw_co_get_block_status(BlockDriverState *bs,
254 int64_t sector_num,
Fam Zheng67a0fd22016-01-26 11:58:48 +0800255 int nb_sectors, int *pnum,
256 BlockDriverState **file)
Laszlo Erseke1c66c62013-08-21 12:41:17 +0200257{
Tomáš Golembiovský2fdc7042016-10-31 11:27:40 +0100258 BDRVRawState *s = bs->opaque;
Peter Lieven92bc50a2013-10-08 14:43:14 +0200259 *pnum = nb_sectors;
Fam Zheng02650ac2016-01-26 11:58:51 +0800260 *file = bs->file->bs;
Tomáš Golembiovský2fdc7042016-10-31 11:27:40 +0100261 sector_num += s->offset / BDRV_SECTOR_SIZE;
Peter Lieven92bc50a2013-10-08 14:43:14 +0200262 return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID | BDRV_BLOCK_DATA |
263 (sector_num << BDRV_SECTOR_BITS);
Laszlo Erseke1c66c62013-08-21 12:41:17 +0200264}
265
Eric Blake39ad9372016-06-01 15:10:11 -0600266static int coroutine_fn raw_co_pwrite_zeroes(BlockDriverState *bs,
267 int64_t offset, int count,
268 BdrvRequestFlags flags)
Laszlo Erseke1c66c62013-08-21 12:41:17 +0200269{
Tomáš Golembiovský2fdc7042016-10-31 11:27:40 +0100270 BDRVRawState *s = bs->opaque;
271 if (offset > UINT64_MAX - s->offset) {
272 return -EINVAL;
273 }
274 offset += s->offset;
Kevin Wolfa03ef882016-06-20 21:31:46 +0200275 return bdrv_co_pwrite_zeroes(bs->file, offset, count, flags);
Laszlo Erseke1c66c62013-08-21 12:41:17 +0200276}
277
Eric Blake5f61ad02016-07-15 17:23:04 -0600278static int coroutine_fn raw_co_pdiscard(BlockDriverState *bs,
279 int64_t offset, int count)
Laszlo Erseke1c66c62013-08-21 12:41:17 +0200280{
Tomáš Golembiovský2fdc7042016-10-31 11:27:40 +0100281 BDRVRawState *s = bs->opaque;
282 if (offset > UINT64_MAX - s->offset) {
283 return -EINVAL;
284 }
285 offset += s->offset;
Eric Blake5f61ad02016-07-15 17:23:04 -0600286 return bdrv_co_pdiscard(bs->file->bs, offset, count);
Laszlo Erseke1c66c62013-08-21 12:41:17 +0200287}
288
Laszlo Ersek7a6d3fc2013-08-21 12:41:23 +0200289static int64_t raw_getlength(BlockDriverState *bs)
Laszlo Erseke1c66c62013-08-21 12:41:17 +0200290{
Tomáš Golembiovský2fdc7042016-10-31 11:27:40 +0100291 int64_t len;
292 BDRVRawState *s = bs->opaque;
293
294 /* Update size. It should not change unless the file was externally
295 * modified. */
296 len = bdrv_getlength(bs->file->bs);
297 if (len < 0) {
298 return len;
299 }
300
301 if (len < s->offset) {
302 s->size = 0;
303 } else {
304 if (s->has_size) {
305 /* Try to honour the size */
306 s->size = MIN(s->size, len - s->offset);
307 } else {
308 s->size = len - s->offset;
309 }
310 }
311
312 return s->size;
Laszlo Erseke1c66c62013-08-21 12:41:17 +0200313}
314
Laszlo Ersek7a6d3fc2013-08-21 12:41:23 +0200315static int raw_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
Laszlo Erseke1c66c62013-08-21 12:41:17 +0200316{
Kevin Wolf9a4f4c32015-06-16 14:19:22 +0200317 return bdrv_get_info(bs->file->bs, bdi);
Laszlo Erseke1c66c62013-08-21 12:41:17 +0200318}
319
Eric Blakedecaeed2016-07-15 17:23:08 -0600320static void raw_refresh_limits(BlockDriverState *bs, Error **errp)
321{
322 if (bs->probed) {
323 /* To make it easier to protect the first sector, any probed
324 * image is restricted to read-modify-write on sub-sector
325 * operations. */
326 bs->bl.request_alignment = BDRV_SECTOR_SIZE;
327 }
328}
329
Max Reitz4bff28b2017-03-28 22:51:28 +0200330static int raw_truncate(BlockDriverState *bs, int64_t offset, Error **errp)
Laszlo Erseke1c66c62013-08-21 12:41:17 +0200331{
Tomáš Golembiovský2fdc7042016-10-31 11:27:40 +0100332 BDRVRawState *s = bs->opaque;
333
334 if (s->has_size) {
Max Reitzf59adb32017-03-28 22:51:29 +0200335 error_setg(errp, "Cannot resize fixed-size raw disks");
Tomáš Golembiovský2fdc7042016-10-31 11:27:40 +0100336 return -ENOTSUP;
337 }
338
339 if (INT64_MAX - offset < s->offset) {
Max Reitzf59adb32017-03-28 22:51:29 +0200340 error_setg(errp, "Disk size too large for the chosen offset");
Tomáš Golembiovský2fdc7042016-10-31 11:27:40 +0100341 return -EINVAL;
342 }
343
344 s->size = offset;
345 offset += s->offset;
Max Reitz4bff28b2017-03-28 22:51:28 +0200346 return bdrv_truncate(bs->file, offset, errp);
Laszlo Erseke1c66c62013-08-21 12:41:17 +0200347}
348
Laszlo Ersek7a6d3fc2013-08-21 12:41:23 +0200349static int raw_media_changed(BlockDriverState *bs)
Laszlo Erseke1c66c62013-08-21 12:41:17 +0200350{
Kevin Wolf9a4f4c32015-06-16 14:19:22 +0200351 return bdrv_media_changed(bs->file->bs);
Laszlo Erseke1c66c62013-08-21 12:41:17 +0200352}
353
Laszlo Ersek7a6d3fc2013-08-21 12:41:23 +0200354static void raw_eject(BlockDriverState *bs, bool eject_flag)
Laszlo Erseke1c66c62013-08-21 12:41:17 +0200355{
Kevin Wolf9a4f4c32015-06-16 14:19:22 +0200356 bdrv_eject(bs->file->bs, eject_flag);
Laszlo Erseke1c66c62013-08-21 12:41:17 +0200357}
358
Laszlo Ersek7a6d3fc2013-08-21 12:41:23 +0200359static void raw_lock_medium(BlockDriverState *bs, bool locked)
Laszlo Erseke1c66c62013-08-21 12:41:17 +0200360{
Kevin Wolf9a4f4c32015-06-16 14:19:22 +0200361 bdrv_lock_medium(bs->file->bs, locked);
Laszlo Erseke1c66c62013-08-21 12:41:17 +0200362}
363
Kevin Wolf151a2932016-10-20 15:09:36 +0200364static int raw_co_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
Laszlo Erseke1c66c62013-08-21 12:41:17 +0200365{
Tomáš Golembiovský2fdc7042016-10-31 11:27:40 +0100366 BDRVRawState *s = bs->opaque;
367 if (s->offset || s->has_size) {
368 return -ENOTSUP;
369 }
Kevin Wolf151a2932016-10-20 15:09:36 +0200370 return bdrv_co_ioctl(bs->file->bs, req, buf);
Laszlo Erseke1c66c62013-08-21 12:41:17 +0200371}
372
Laszlo Ersek7a6d3fc2013-08-21 12:41:23 +0200373static int raw_has_zero_init(BlockDriverState *bs)
Laszlo Erseke1c66c62013-08-21 12:41:17 +0200374{
Kevin Wolf9a4f4c32015-06-16 14:19:22 +0200375 return bdrv_has_zero_init(bs->file->bs);
Laszlo Erseke1c66c62013-08-21 12:41:17 +0200376}
377
Chunyan Liucd3a4cf2014-06-05 17:21:03 +0800378static int raw_create(const char *filename, QemuOpts *opts, Error **errp)
Laszlo Ersek15652622013-08-21 12:41:19 +0200379{
Eduardo Habkost9be38592016-06-13 18:57:58 -0300380 return bdrv_create_file(filename, opts, errp);
Laszlo Ersek15652622013-08-21 12:41:19 +0200381}
Laszlo Ersek01dd96d2013-08-21 12:41:20 +0200382
Max Reitz015a1032013-09-05 14:22:29 +0200383static int raw_open(BlockDriverState *bs, QDict *options, int flags,
384 Error **errp)
Laszlo Ersek01dd96d2013-08-21 12:41:20 +0200385{
Tomáš Golembiovský2fdc7042016-10-31 11:27:40 +0100386 BDRVRawState *s = bs->opaque;
387 int ret;
388
Kevin Wolf4e4bf5c2016-12-16 18:52:37 +0100389 bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file,
390 false, errp);
391 if (!bs->file) {
392 return -EINVAL;
393 }
394
Kevin Wolf9a4f4c32015-06-16 14:19:22 +0200395 bs->sg = bs->file->bs->sg;
Eric Blake8a39b4d2016-07-15 12:32:00 -0600396 bs->supported_write_flags = BDRV_REQ_FUA &
397 bs->file->bs->supported_write_flags;
398 bs->supported_zero_flags = (BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP) &
399 bs->file->bs->supported_zero_flags;
Kevin Wolf38f3ef52014-11-20 16:27:12 +0100400
401 if (bs->probed && !bdrv_is_read_only(bs)) {
402 fprintf(stderr,
403 "WARNING: Image format was not specified for '%s' and probing "
404 "guessed raw.\n"
405 " Automatically detecting the format is dangerous for "
406 "raw images, write operations on block 0 will be restricted.\n"
407 " Specify the 'raw' format explicitly to remove the "
408 "restrictions.\n",
Kevin Wolf9a4f4c32015-06-16 14:19:22 +0200409 bs->file->bs->filename);
Kevin Wolf38f3ef52014-11-20 16:27:12 +0100410 }
411
Tomáš Golembiovský2fdc7042016-10-31 11:27:40 +0100412 ret = raw_read_options(options, bs, s, errp);
413 if (ret < 0) {
414 return ret;
415 }
416
417 if (bs->sg && (s->offset || s->has_size)) {
418 error_setg(errp, "Cannot use offset/size with SCSI generic devices");
419 return -EINVAL;
420 }
421
Laszlo Ersek01dd96d2013-08-21 12:41:20 +0200422 return 0;
423}
424
Laszlo Ersek7a6d3fc2013-08-21 12:41:23 +0200425static void raw_close(BlockDriverState *bs)
Laszlo Ersek01dd96d2013-08-21 12:41:20 +0200426{
427}
428
Laszlo Ersek7a6d3fc2013-08-21 12:41:23 +0200429static int raw_probe(const uint8_t *buf, int buf_size, const char *filename)
Laszlo Ersek01dd96d2013-08-21 12:41:20 +0200430{
431 /* smallest possible positive score so that raw is used if and only if no
432 * other block driver works
433 */
434 return 1;
435}
Laszlo Ersek775d6af2013-08-21 12:41:22 +0200436
Ekaterina Tumanova1a9335e2015-02-16 12:47:56 +0100437static int raw_probe_blocksizes(BlockDriverState *bs, BlockSizes *bsz)
438{
Tomáš Golembiovský2fdc7042016-10-31 11:27:40 +0100439 BDRVRawState *s = bs->opaque;
440 int ret;
441
442 ret = bdrv_probe_blocksizes(bs->file->bs, bsz);
443 if (ret < 0) {
444 return ret;
445 }
446
447 if (!QEMU_IS_ALIGNED(s->offset, MAX(bsz->log, bsz->phys))) {
448 return -ENOTSUP;
449 }
450
451 return 0;
Ekaterina Tumanova1a9335e2015-02-16 12:47:56 +0100452}
453
454static int raw_probe_geometry(BlockDriverState *bs, HDGeometry *geo)
455{
Tomáš Golembiovský2fdc7042016-10-31 11:27:40 +0100456 BDRVRawState *s = bs->opaque;
457 if (s->offset || s->has_size) {
458 return -ENOTSUP;
459 }
Kevin Wolf9a4f4c32015-06-16 14:19:22 +0200460 return bdrv_probe_geometry(bs->file->bs, geo);
Ekaterina Tumanova1a9335e2015-02-16 12:47:56 +0100461}
462
Max Reitz5f535a92014-12-02 18:32:41 +0100463BlockDriver bdrv_raw = {
Laszlo Ersek775d6af2013-08-21 12:41:22 +0200464 .format_name = "raw",
Tomáš Golembiovský2fdc7042016-10-31 11:27:40 +0100465 .instance_size = sizeof(BDRVRawState),
Laszlo Ersek775d6af2013-08-21 12:41:22 +0200466 .bdrv_probe = &raw_probe,
467 .bdrv_reopen_prepare = &raw_reopen_prepare,
Tomáš Golembiovský2fdc7042016-10-31 11:27:40 +0100468 .bdrv_reopen_commit = &raw_reopen_commit,
469 .bdrv_reopen_abort = &raw_reopen_abort,
Laszlo Ersek775d6af2013-08-21 12:41:22 +0200470 .bdrv_open = &raw_open,
471 .bdrv_close = &raw_close,
Kevin Wolfd7010df2016-12-15 12:28:58 +0100472 .bdrv_child_perm = bdrv_filter_default_perms,
Chunyan Liuc282e1f2014-06-05 17:21:11 +0800473 .bdrv_create = &raw_create,
Eric Blakedecaeed2016-07-15 17:23:08 -0600474 .bdrv_co_preadv = &raw_co_preadv,
475 .bdrv_co_pwritev = &raw_co_pwritev,
Eric Blake39ad9372016-06-01 15:10:11 -0600476 .bdrv_co_pwrite_zeroes = &raw_co_pwrite_zeroes,
Eric Blake5f61ad02016-07-15 17:23:04 -0600477 .bdrv_co_pdiscard = &raw_co_pdiscard,
Paolo Bonzinib6b8a332013-09-04 19:00:28 +0200478 .bdrv_co_get_block_status = &raw_co_get_block_status,
Laszlo Ersek775d6af2013-08-21 12:41:22 +0200479 .bdrv_truncate = &raw_truncate,
480 .bdrv_getlength = &raw_getlength,
Kevin Wolfb94a2612013-10-29 12:18:58 +0100481 .has_variable_length = true,
Laszlo Ersek775d6af2013-08-21 12:41:22 +0200482 .bdrv_get_info = &raw_get_info,
Eric Blakedecaeed2016-07-15 17:23:08 -0600483 .bdrv_refresh_limits = &raw_refresh_limits,
Ekaterina Tumanova1a9335e2015-02-16 12:47:56 +0100484 .bdrv_probe_blocksizes = &raw_probe_blocksizes,
485 .bdrv_probe_geometry = &raw_probe_geometry,
Laszlo Ersek775d6af2013-08-21 12:41:22 +0200486 .bdrv_media_changed = &raw_media_changed,
487 .bdrv_eject = &raw_eject,
488 .bdrv_lock_medium = &raw_lock_medium,
Kevin Wolf151a2932016-10-20 15:09:36 +0200489 .bdrv_co_ioctl = &raw_co_ioctl,
Chunyan Liucd3a4cf2014-06-05 17:21:03 +0800490 .create_opts = &raw_create_opts,
Laszlo Ersek775d6af2013-08-21 12:41:22 +0200491 .bdrv_has_zero_init = &raw_has_zero_init
492};
493
494static void bdrv_raw_init(void)
495{
496 bdrv_register(&bdrv_raw);
497}
498
499block_init(bdrv_raw_init);