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Commit | Line | Data |
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9aebd98a SW |
1 | /* |
2 | * Block driver for the Virtual Disk Image (VDI) format | |
3 | * | |
641543b7 | 4 | * Copyright (c) 2009, 2012 Stefan Weil |
9aebd98a SW |
5 | * |
6 | * This program is free software: you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, either version 2 of the License, or | |
9 | * (at your option) version 3 or any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | * | |
19 | * Reference: | |
20 | * http://forums.virtualbox.org/viewtopic.php?t=8046 | |
21 | * | |
22 | * This driver supports create / read / write operations on VDI images. | |
23 | * | |
24 | * Todo (see also TODO in code): | |
25 | * | |
26 | * Some features like snapshots are still missing. | |
27 | * | |
28 | * Deallocation of zero-filled blocks and shrinking images are missing, too | |
29 | * (might be added to common block layer). | |
30 | * | |
31 | * Allocation of blocks could be optimized (less writes to block map and | |
32 | * header). | |
33 | * | |
dc6fb73d | 34 | * Read and write of adjacent blocks could be done in one operation |
9aebd98a SW |
35 | * (current code uses one operation per block (1 MiB). |
36 | * | |
37 | * The code is not thread safe (missing locks for changes in header and | |
38 | * block table, no problem with current QEMU). | |
39 | * | |
40 | * Hints: | |
41 | * | |
42 | * Blocks (VDI documentation) correspond to clusters (QEMU). | |
43 | * QEMU's backing files could be implemented using VDI snapshot files (TODO). | |
44 | * VDI snapshot files may also contain the complete machine state. | |
45 | * Maybe this machine state can be converted to QEMU PC machine snapshot data. | |
46 | * | |
47 | * The driver keeps a block cache (little endian entries) in memory. | |
48 | * For the standard block size (1 MiB), a 1 TiB disk will use 4 MiB RAM, | |
49 | * so this seems to be reasonable. | |
50 | */ | |
51 | ||
80c71a24 | 52 | #include "qemu/osdep.h" |
da34e65c | 53 | #include "qapi/error.h" |
49858b50 HR |
54 | #include "qapi/qmp/qdict.h" |
55 | #include "qapi/qobject-input-visitor.h" | |
56 | #include "qapi/qapi-visit-block-core.h" | |
737e150e | 57 | #include "block/block_int.h" |
a08f0c3b | 58 | #include "sysemu/block-backend.h" |
1de7afc9 | 59 | #include "qemu/module.h" |
922a01a0 | 60 | #include "qemu/option.h" |
58369e22 | 61 | #include "qemu/bswap.h" |
795c40b8 | 62 | #include "migration/blocker.h" |
10817bf0 | 63 | #include "qemu/coroutine.h" |
f348b6d1 | 64 | #include "qemu/cutils.h" |
7c6f55b6 | 65 | #include "qemu/uuid.h" |
9aebd98a SW |
66 | |
67 | /* Code configuration options. */ | |
68 | ||
69 | /* Enable debug messages. */ | |
70 | //~ #define CONFIG_VDI_DEBUG | |
71 | ||
72 | /* Support write operations on VDI images. */ | |
73 | #define CONFIG_VDI_WRITE | |
74 | ||
75 | /* Support non-standard block (cluster) size. This is untested. | |
76 | * Maybe it will be needed for very large images. | |
77 | */ | |
78 | //~ #define CONFIG_VDI_BLOCK_SIZE | |
79 | ||
80 | /* Support static (fixed, pre-allocated) images. */ | |
81 | #define CONFIG_VDI_STATIC_IMAGE | |
82 | ||
83 | /* Command line option for static images. */ | |
84 | #define BLOCK_OPT_STATIC "static" | |
85 | ||
86 | #define KiB 1024 | |
87 | #define MiB (KiB * KiB) | |
88 | ||
89 | #define SECTOR_SIZE 512 | |
99cce9fa | 90 | #define DEFAULT_CLUSTER_SIZE (1 * MiB) |
9aebd98a SW |
91 | |
92 | #if defined(CONFIG_VDI_DEBUG) | |
b80666bf | 93 | #define VDI_DEBUG 1 |
9aebd98a | 94 | #else |
b80666bf | 95 | #define VDI_DEBUG 0 |
9aebd98a SW |
96 | #endif |
97 | ||
b80666bf EB |
98 | #define logout(fmt, ...) \ |
99 | do { \ | |
100 | if (VDI_DEBUG) { \ | |
101 | fprintf(stderr, "vdi\t%-24s" fmt, __func__, ##__VA_ARGS__); \ | |
102 | } \ | |
103 | } while (0) | |
104 | ||
9aebd98a SW |
105 | /* Image signature. */ |
106 | #define VDI_SIGNATURE 0xbeda107f | |
107 | ||
108 | /* Image version. */ | |
109 | #define VDI_VERSION_1_1 0x00010001 | |
110 | ||
111 | /* Image type. */ | |
112 | #define VDI_TYPE_DYNAMIC 1 | |
113 | #define VDI_TYPE_STATIC 2 | |
114 | ||
115 | /* Innotek / SUN images use these strings in header.text: | |
116 | * "<<< innotek VirtualBox Disk Image >>>\n" | |
117 | * "<<< Sun xVM VirtualBox Disk Image >>>\n" | |
118 | * "<<< Sun VirtualBox Disk Image >>>\n" | |
119 | * The value does not matter, so QEMU created images use a different text. | |
120 | */ | |
121 | #define VDI_TEXT "<<< QEMU VM Virtual Disk Image >>>\n" | |
122 | ||
c794b4e0 ES |
123 | /* A never-allocated block; semantically arbitrary content. */ |
124 | #define VDI_UNALLOCATED 0xffffffffU | |
125 | ||
126 | /* A discarded (no longer allocated) block; semantically zero-filled. */ | |
127 | #define VDI_DISCARDED 0xfffffffeU | |
128 | ||
129 | #define VDI_IS_ALLOCATED(X) ((X) < VDI_DISCARDED) | |
9aebd98a | 130 | |
d20418ee HR |
131 | /* The bmap will take up VDI_BLOCKS_IN_IMAGE_MAX * sizeof(uint32_t) bytes; since |
132 | * the bmap is read and written in a single operation, its size needs to be | |
133 | * limited to INT_MAX; furthermore, when opening an image, the bmap size is | |
134 | * rounded up to be aligned on BDRV_SECTOR_SIZE. | |
135 | * Therefore this should satisfy the following: | |
136 | * VDI_BLOCKS_IN_IMAGE_MAX * sizeof(uint32_t) + BDRV_SECTOR_SIZE == INT_MAX + 1 | |
137 | * (INT_MAX + 1 is the first value not representable as an int) | |
138 | * This guarantees that any value below or equal to the constant will, when | |
139 | * multiplied by sizeof(uint32_t) and rounded up to a BDRV_SECTOR_SIZE boundary, | |
140 | * still be below or equal to INT_MAX. */ | |
141 | #define VDI_BLOCKS_IN_IMAGE_MAX \ | |
142 | ((unsigned)((INT_MAX + 1u - BDRV_SECTOR_SIZE) / sizeof(uint32_t))) | |
63fa06dc JC |
143 | #define VDI_DISK_SIZE_MAX ((uint64_t)VDI_BLOCKS_IN_IMAGE_MAX * \ |
144 | (uint64_t)DEFAULT_CLUSTER_SIZE) | |
145 | ||
49858b50 HR |
146 | static QemuOptsList vdi_create_opts; |
147 | ||
9aebd98a SW |
148 | typedef struct { |
149 | char text[0x40]; | |
150 | uint32_t signature; | |
151 | uint32_t version; | |
152 | uint32_t header_size; | |
153 | uint32_t image_type; | |
154 | uint32_t image_flags; | |
155 | char description[256]; | |
156 | uint32_t offset_bmap; | |
157 | uint32_t offset_data; | |
158 | uint32_t cylinders; /* disk geometry, unused here */ | |
159 | uint32_t heads; /* disk geometry, unused here */ | |
160 | uint32_t sectors; /* disk geometry, unused here */ | |
161 | uint32_t sector_size; | |
162 | uint32_t unused1; | |
163 | uint64_t disk_size; | |
164 | uint32_t block_size; | |
165 | uint32_t block_extra; /* unused here */ | |
166 | uint32_t blocks_in_image; | |
167 | uint32_t blocks_allocated; | |
7c6f55b6 FZ |
168 | QemuUUID uuid_image; |
169 | QemuUUID uuid_last_snap; | |
170 | QemuUUID uuid_link; | |
171 | QemuUUID uuid_parent; | |
9aebd98a | 172 | uint64_t unused2[7]; |
8368febd | 173 | } QEMU_PACKED VdiHeader; |
9aebd98a SW |
174 | |
175 | typedef struct { | |
9aebd98a SW |
176 | /* The block map entries are little endian (even in memory). */ |
177 | uint32_t *bmap; | |
178 | /* Size of block (bytes). */ | |
179 | uint32_t block_size; | |
9aebd98a SW |
180 | /* First sector of block map. */ |
181 | uint32_t bmap_sector; | |
4ff9786c | 182 | /* VDI header (converted to host endianness). */ |
9aebd98a | 183 | VdiHeader header; |
fc9d106c | 184 | |
1e886639 | 185 | CoRwlock bmap_lock; |
f0ab6f10 | 186 | |
fc9d106c | 187 | Error *migration_blocker; |
9aebd98a SW |
188 | } BDRVVdiState; |
189 | ||
9aebd98a SW |
190 | static void vdi_header_to_cpu(VdiHeader *header) |
191 | { | |
192 | le32_to_cpus(&header->signature); | |
193 | le32_to_cpus(&header->version); | |
194 | le32_to_cpus(&header->header_size); | |
195 | le32_to_cpus(&header->image_type); | |
196 | le32_to_cpus(&header->image_flags); | |
197 | le32_to_cpus(&header->offset_bmap); | |
198 | le32_to_cpus(&header->offset_data); | |
199 | le32_to_cpus(&header->cylinders); | |
200 | le32_to_cpus(&header->heads); | |
201 | le32_to_cpus(&header->sectors); | |
202 | le32_to_cpus(&header->sector_size); | |
203 | le64_to_cpus(&header->disk_size); | |
204 | le32_to_cpus(&header->block_size); | |
205 | le32_to_cpus(&header->block_extra); | |
206 | le32_to_cpus(&header->blocks_in_image); | |
207 | le32_to_cpus(&header->blocks_allocated); | |
7c6f55b6 FZ |
208 | qemu_uuid_bswap(&header->uuid_image); |
209 | qemu_uuid_bswap(&header->uuid_last_snap); | |
210 | qemu_uuid_bswap(&header->uuid_link); | |
211 | qemu_uuid_bswap(&header->uuid_parent); | |
9aebd98a SW |
212 | } |
213 | ||
214 | static void vdi_header_to_le(VdiHeader *header) | |
215 | { | |
216 | cpu_to_le32s(&header->signature); | |
217 | cpu_to_le32s(&header->version); | |
218 | cpu_to_le32s(&header->header_size); | |
219 | cpu_to_le32s(&header->image_type); | |
220 | cpu_to_le32s(&header->image_flags); | |
221 | cpu_to_le32s(&header->offset_bmap); | |
222 | cpu_to_le32s(&header->offset_data); | |
223 | cpu_to_le32s(&header->cylinders); | |
224 | cpu_to_le32s(&header->heads); | |
225 | cpu_to_le32s(&header->sectors); | |
226 | cpu_to_le32s(&header->sector_size); | |
227 | cpu_to_le64s(&header->disk_size); | |
228 | cpu_to_le32s(&header->block_size); | |
229 | cpu_to_le32s(&header->block_extra); | |
230 | cpu_to_le32s(&header->blocks_in_image); | |
231 | cpu_to_le32s(&header->blocks_allocated); | |
7c6f55b6 FZ |
232 | qemu_uuid_bswap(&header->uuid_image); |
233 | qemu_uuid_bswap(&header->uuid_last_snap); | |
234 | qemu_uuid_bswap(&header->uuid_link); | |
235 | qemu_uuid_bswap(&header->uuid_parent); | |
9aebd98a SW |
236 | } |
237 | ||
238 | #if defined(CONFIG_VDI_DEBUG) | |
239 | static void vdi_header_print(VdiHeader *header) | |
240 | { | |
241 | char uuid[37]; | |
242 | logout("text %s", header->text); | |
9f0470bb | 243 | logout("signature 0x%08x\n", header->signature); |
9aebd98a SW |
244 | logout("header size 0x%04x\n", header->header_size); |
245 | logout("image type 0x%04x\n", header->image_type); | |
246 | logout("image flags 0x%04x\n", header->image_flags); | |
247 | logout("description %s\n", header->description); | |
248 | logout("offset bmap 0x%04x\n", header->offset_bmap); | |
249 | logout("offset data 0x%04x\n", header->offset_data); | |
250 | logout("cylinders 0x%04x\n", header->cylinders); | |
251 | logout("heads 0x%04x\n", header->heads); | |
252 | logout("sectors 0x%04x\n", header->sectors); | |
253 | logout("sector size 0x%04x\n", header->sector_size); | |
254 | logout("image size 0x%" PRIx64 " B (%" PRIu64 " MiB)\n", | |
255 | header->disk_size, header->disk_size / MiB); | |
256 | logout("block size 0x%04x\n", header->block_size); | |
257 | logout("block extra 0x%04x\n", header->block_extra); | |
258 | logout("blocks tot. 0x%04x\n", header->blocks_in_image); | |
259 | logout("blocks all. 0x%04x\n", header->blocks_allocated); | |
260 | uuid_unparse(header->uuid_image, uuid); | |
261 | logout("uuid image %s\n", uuid); | |
262 | uuid_unparse(header->uuid_last_snap, uuid); | |
263 | logout("uuid snap %s\n", uuid); | |
264 | uuid_unparse(header->uuid_link, uuid); | |
265 | logout("uuid link %s\n", uuid); | |
266 | uuid_unparse(header->uuid_parent, uuid); | |
267 | logout("uuid parent %s\n", uuid); | |
268 | } | |
269 | #endif | |
270 | ||
2fd61638 PB |
271 | static int coroutine_fn vdi_co_check(BlockDriverState *bs, BdrvCheckResult *res, |
272 | BdrvCheckMode fix) | |
9aebd98a SW |
273 | { |
274 | /* TODO: additional checks possible. */ | |
275 | BDRVVdiState *s = (BDRVVdiState *)bs->opaque; | |
9aebd98a SW |
276 | uint32_t blocks_allocated = 0; |
277 | uint32_t block; | |
278 | uint32_t *bmap; | |
279 | logout("\n"); | |
280 | ||
4534ff54 KW |
281 | if (fix) { |
282 | return -ENOTSUP; | |
283 | } | |
284 | ||
5839e53b | 285 | bmap = g_try_new(uint32_t, s->header.blocks_in_image); |
17cce735 KW |
286 | if (s->header.blocks_in_image && bmap == NULL) { |
287 | res->check_errors++; | |
288 | return -ENOMEM; | |
289 | } | |
290 | ||
9aebd98a SW |
291 | memset(bmap, 0xff, s->header.blocks_in_image * sizeof(uint32_t)); |
292 | ||
293 | /* Check block map and value of blocks_allocated. */ | |
294 | for (block = 0; block < s->header.blocks_in_image; block++) { | |
295 | uint32_t bmap_entry = le32_to_cpu(s->bmap[block]); | |
c794b4e0 | 296 | if (VDI_IS_ALLOCATED(bmap_entry)) { |
9aebd98a SW |
297 | if (bmap_entry < s->header.blocks_in_image) { |
298 | blocks_allocated++; | |
c794b4e0 | 299 | if (!VDI_IS_ALLOCATED(bmap[bmap_entry])) { |
9aebd98a SW |
300 | bmap[bmap_entry] = bmap_entry; |
301 | } else { | |
302 | fprintf(stderr, "ERROR: block index %" PRIu32 | |
303 | " also used by %" PRIu32 "\n", bmap[bmap_entry], bmap_entry); | |
9ac228e0 | 304 | res->corruptions++; |
9aebd98a SW |
305 | } |
306 | } else { | |
307 | fprintf(stderr, "ERROR: block index %" PRIu32 | |
308 | " too large, is %" PRIu32 "\n", block, bmap_entry); | |
9ac228e0 | 309 | res->corruptions++; |
9aebd98a SW |
310 | } |
311 | } | |
312 | } | |
313 | if (blocks_allocated != s->header.blocks_allocated) { | |
314 | fprintf(stderr, "ERROR: allocated blocks mismatch, is %" PRIu32 | |
315 | ", should be %" PRIu32 "\n", | |
316 | blocks_allocated, s->header.blocks_allocated); | |
9ac228e0 | 317 | res->corruptions++; |
9aebd98a SW |
318 | } |
319 | ||
7267c094 | 320 | g_free(bmap); |
9aebd98a | 321 | |
9ac228e0 | 322 | return 0; |
9aebd98a SW |
323 | } |
324 | ||
325 | static int vdi_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) | |
326 | { | |
327 | /* TODO: vdi_get_info would be needed for machine snapshots. | |
328 | vm_state_offset is still missing. */ | |
329 | BDRVVdiState *s = (BDRVVdiState *)bs->opaque; | |
330 | logout("\n"); | |
331 | bdi->cluster_size = s->block_size; | |
332 | bdi->vm_state_offset = 0; | |
95de6d70 | 333 | bdi->unallocated_blocks_are_zero = true; |
9aebd98a SW |
334 | return 0; |
335 | } | |
336 | ||
337 | static int vdi_make_empty(BlockDriverState *bs) | |
338 | { | |
339 | /* TODO: missing code. */ | |
340 | logout("\n"); | |
341 | /* The return value for missing code must be 0, see block.c. */ | |
342 | return 0; | |
343 | } | |
344 | ||
345 | static int vdi_probe(const uint8_t *buf, int buf_size, const char *filename) | |
346 | { | |
347 | const VdiHeader *header = (const VdiHeader *)buf; | |
dddc7750 | 348 | int ret = 0; |
9aebd98a SW |
349 | |
350 | logout("\n"); | |
351 | ||
352 | if (buf_size < sizeof(*header)) { | |
353 | /* Header too small, no VDI. */ | |
354 | } else if (le32_to_cpu(header->signature) == VDI_SIGNATURE) { | |
dddc7750 | 355 | ret = 100; |
9aebd98a SW |
356 | } |
357 | ||
dddc7750 | 358 | if (ret == 0) { |
9aebd98a SW |
359 | logout("no vdi image\n"); |
360 | } else { | |
361 | logout("%s", header->text); | |
362 | } | |
363 | ||
dddc7750 | 364 | return ret; |
9aebd98a SW |
365 | } |
366 | ||
015a1036 HR |
367 | static int vdi_open(BlockDriverState *bs, QDict *options, int flags, |
368 | Error **errp) | |
9aebd98a SW |
369 | { |
370 | BDRVVdiState *s = bs->opaque; | |
371 | VdiHeader header; | |
372 | size_t bmap_size; | |
8937f822 | 373 | int ret; |
fe44dc91 | 374 | Error *local_err = NULL; |
9aebd98a | 375 | |
4e4bf5c4 KW |
376 | bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file, |
377 | false, errp); | |
378 | if (!bs->file) { | |
379 | return -EINVAL; | |
380 | } | |
381 | ||
9aebd98a SW |
382 | logout("\n"); |
383 | ||
fbcbbf4e | 384 | ret = bdrv_read(bs->file, 0, (uint8_t *)&header, 1); |
8937f822 | 385 | if (ret < 0) { |
9aebd98a SW |
386 | goto fail; |
387 | } | |
388 | ||
389 | vdi_header_to_cpu(&header); | |
390 | #if defined(CONFIG_VDI_DEBUG) | |
391 | vdi_header_print(&header); | |
392 | #endif | |
393 | ||
63fa06dc JC |
394 | if (header.disk_size > VDI_DISK_SIZE_MAX) { |
395 | error_setg(errp, "Unsupported VDI image size (size is 0x%" PRIx64 | |
396 | ", max supported is 0x%" PRIx64 ")", | |
397 | header.disk_size, VDI_DISK_SIZE_MAX); | |
398 | ret = -ENOTSUP; | |
399 | goto fail; | |
400 | } | |
401 | ||
f21dc3a4 SW |
402 | if (header.disk_size % SECTOR_SIZE != 0) { |
403 | /* 'VBoxManage convertfromraw' can create images with odd disk sizes. | |
404 | We accept them but round the disk size to the next multiple of | |
405 | SECTOR_SIZE. */ | |
406 | logout("odd disk size %" PRIu64 " B, round up\n", header.disk_size); | |
e9082e47 | 407 | header.disk_size = ROUND_UP(header.disk_size, SECTOR_SIZE); |
f21dc3a4 SW |
408 | } |
409 | ||
0e87ba2c | 410 | if (header.signature != VDI_SIGNATURE) { |
521b2b5d HR |
411 | error_setg(errp, "Image not in VDI format (bad signature %08" PRIx32 |
412 | ")", header.signature); | |
76abe407 | 413 | ret = -EINVAL; |
0e87ba2c SW |
414 | goto fail; |
415 | } else if (header.version != VDI_VERSION_1_1) { | |
521b2b5d HR |
416 | error_setg(errp, "unsupported VDI image (version %" PRIu32 ".%" PRIu32 |
417 | ")", header.version >> 16, header.version & 0xffff); | |
8937f822 | 418 | ret = -ENOTSUP; |
9aebd98a SW |
419 | goto fail; |
420 | } else if (header.offset_bmap % SECTOR_SIZE != 0) { | |
421 | /* We only support block maps which start on a sector boundary. */ | |
5b7aa9b5 | 422 | error_setg(errp, "unsupported VDI image (unaligned block map offset " |
521b2b5d | 423 | "0x%" PRIx32 ")", header.offset_bmap); |
8937f822 | 424 | ret = -ENOTSUP; |
9aebd98a SW |
425 | goto fail; |
426 | } else if (header.offset_data % SECTOR_SIZE != 0) { | |
427 | /* We only support data blocks which start on a sector boundary. */ | |
521b2b5d HR |
428 | error_setg(errp, "unsupported VDI image (unaligned data offset 0x%" |
429 | PRIx32 ")", header.offset_data); | |
8937f822 | 430 | ret = -ENOTSUP; |
9aebd98a SW |
431 | goto fail; |
432 | } else if (header.sector_size != SECTOR_SIZE) { | |
521b2b5d HR |
433 | error_setg(errp, "unsupported VDI image (sector size %" PRIu32 |
434 | " is not %u)", header.sector_size, SECTOR_SIZE); | |
8937f822 | 435 | ret = -ENOTSUP; |
9aebd98a | 436 | goto fail; |
63fa06dc | 437 | } else if (header.block_size != DEFAULT_CLUSTER_SIZE) { |
521b2b5d HR |
438 | error_setg(errp, "unsupported VDI image (block size %" PRIu32 |
439 | " is not %u)", header.block_size, DEFAULT_CLUSTER_SIZE); | |
8937f822 | 440 | ret = -ENOTSUP; |
9aebd98a | 441 | goto fail; |
f21dc3a4 SW |
442 | } else if (header.disk_size > |
443 | (uint64_t)header.blocks_in_image * header.block_size) { | |
5b7aa9b5 PB |
444 | error_setg(errp, "unsupported VDI image (disk size %" PRIu64 ", " |
445 | "image bitmap has room for %" PRIu64 ")", | |
446 | header.disk_size, | |
447 | (uint64_t)header.blocks_in_image * header.block_size); | |
8937f822 | 448 | ret = -ENOTSUP; |
9aebd98a | 449 | goto fail; |
7c6f55b6 | 450 | } else if (!qemu_uuid_is_null(&header.uuid_link)) { |
5b7aa9b5 | 451 | error_setg(errp, "unsupported VDI image (non-NULL link UUID)"); |
8937f822 | 452 | ret = -ENOTSUP; |
9aebd98a | 453 | goto fail; |
7c6f55b6 | 454 | } else if (!qemu_uuid_is_null(&header.uuid_parent)) { |
5b7aa9b5 | 455 | error_setg(errp, "unsupported VDI image (non-NULL parent UUID)"); |
8937f822 | 456 | ret = -ENOTSUP; |
9aebd98a | 457 | goto fail; |
63fa06dc JC |
458 | } else if (header.blocks_in_image > VDI_BLOCKS_IN_IMAGE_MAX) { |
459 | error_setg(errp, "unsupported VDI image " | |
460 | "(too many blocks %u, max is %u)", | |
461 | header.blocks_in_image, VDI_BLOCKS_IN_IMAGE_MAX); | |
462 | ret = -ENOTSUP; | |
463 | goto fail; | |
9aebd98a SW |
464 | } |
465 | ||
466 | bs->total_sectors = header.disk_size / SECTOR_SIZE; | |
467 | ||
468 | s->block_size = header.block_size; | |
9aebd98a SW |
469 | s->bmap_sector = header.offset_bmap / SECTOR_SIZE; |
470 | s->header = header; | |
471 | ||
472 | bmap_size = header.blocks_in_image * sizeof(uint32_t); | |
e9082e47 | 473 | bmap_size = DIV_ROUND_UP(bmap_size, SECTOR_SIZE); |
9a4f4c31 | 474 | s->bmap = qemu_try_blockalign(bs->file->bs, bmap_size * SECTOR_SIZE); |
17cce735 KW |
475 | if (s->bmap == NULL) { |
476 | ret = -ENOMEM; | |
477 | goto fail; | |
478 | } | |
479 | ||
fbcbbf4e | 480 | ret = bdrv_read(bs->file, s->bmap_sector, (uint8_t *)s->bmap, |
9a4f4c31 | 481 | bmap_size); |
8937f822 | 482 | if (ret < 0) { |
9aebd98a SW |
483 | goto fail_free_bmap; |
484 | } | |
485 | ||
fc9d106c | 486 | /* Disable migration when vdi images are used */ |
81e5f78a AG |
487 | error_setg(&s->migration_blocker, "The vdi format used by node '%s' " |
488 | "does not support live migration", | |
489 | bdrv_get_device_or_node_name(bs)); | |
fe44dc91 AA |
490 | ret = migrate_add_blocker(s->migration_blocker, &local_err); |
491 | if (local_err) { | |
492 | error_propagate(errp, local_err); | |
493 | error_free(s->migration_blocker); | |
494 | goto fail_free_bmap; | |
495 | } | |
fc9d106c | 496 | |
1e886639 | 497 | qemu_co_rwlock_init(&s->bmap_lock); |
f0ab6f10 | 498 | |
9aebd98a SW |
499 | return 0; |
500 | ||
501 | fail_free_bmap: | |
17cce735 | 502 | qemu_vfree(s->bmap); |
9aebd98a SW |
503 | |
504 | fail: | |
8937f822 | 505 | return ret; |
9aebd98a SW |
506 | } |
507 | ||
ecfe2bba JC |
508 | static int vdi_reopen_prepare(BDRVReopenState *state, |
509 | BlockReopenQueue *queue, Error **errp) | |
510 | { | |
511 | return 0; | |
512 | } | |
513 | ||
67635f6a EB |
514 | static int coroutine_fn vdi_co_block_status(BlockDriverState *bs, |
515 | bool want_zero, | |
516 | int64_t offset, int64_t bytes, | |
517 | int64_t *pnum, int64_t *map, | |
518 | BlockDriverState **file) | |
9aebd98a | 519 | { |
9aebd98a | 520 | BDRVVdiState *s = (BDRVVdiState *)bs->opaque; |
67635f6a EB |
521 | size_t bmap_index = offset / s->block_size; |
522 | size_t index_in_block = offset % s->block_size; | |
9aebd98a | 523 | uint32_t bmap_entry = le32_to_cpu(s->bmap[bmap_index]); |
4bc74be9 PB |
524 | int result; |
525 | ||
67635f6a EB |
526 | logout("%p, %" PRId64 ", %" PRId64 ", %p\n", bs, offset, bytes, pnum); |
527 | *pnum = MIN(s->block_size - index_in_block, bytes); | |
4bc74be9 PB |
528 | result = VDI_IS_ALLOCATED(bmap_entry); |
529 | if (!result) { | |
530 | return 0; | |
531 | } | |
532 | ||
67635f6a EB |
533 | *map = s->header.offset_data + (uint64_t)bmap_entry * s->block_size + |
534 | index_in_block; | |
8bfb1371 | 535 | *file = bs->file->bs; |
67635f6a | 536 | return BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID; |
9aebd98a SW |
537 | } |
538 | ||
0865bb6f KW |
539 | static int coroutine_fn |
540 | vdi_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes, | |
541 | QEMUIOVector *qiov, int flags) | |
9aebd98a | 542 | { |
9aebd98a | 543 | BDRVVdiState *s = bs->opaque; |
0865bb6f | 544 | QEMUIOVector local_qiov; |
9aebd98a SW |
545 | uint32_t bmap_entry; |
546 | uint32_t block_index; | |
0865bb6f KW |
547 | uint32_t offset_in_block; |
548 | uint32_t n_bytes; | |
549 | uint64_t bytes_done = 0; | |
eb9566d1 | 550 | int ret = 0; |
4de659e8 PB |
551 | |
552 | logout("\n"); | |
9aebd98a | 553 | |
0865bb6f | 554 | qemu_iovec_init(&local_qiov, qiov->niov); |
0c7bfc32 | 555 | |
0865bb6f KW |
556 | while (ret >= 0 && bytes > 0) { |
557 | block_index = offset / s->block_size; | |
558 | offset_in_block = offset % s->block_size; | |
559 | n_bytes = MIN(bytes, s->block_size - offset_in_block); | |
560 | ||
561 | logout("will read %u bytes starting at offset %" PRIu64 "\n", | |
562 | n_bytes, offset); | |
eb9566d1 PB |
563 | |
564 | /* prepare next AIO request */ | |
1e886639 | 565 | qemu_co_rwlock_rdlock(&s->bmap_lock); |
eb9566d1 | 566 | bmap_entry = le32_to_cpu(s->bmap[block_index]); |
1e886639 | 567 | qemu_co_rwlock_unlock(&s->bmap_lock); |
eb9566d1 PB |
568 | if (!VDI_IS_ALLOCATED(bmap_entry)) { |
569 | /* Block not allocated, return zeros, no need to wait. */ | |
0865bb6f | 570 | qemu_iovec_memset(qiov, bytes_done, 0, n_bytes); |
eb9566d1 PB |
571 | ret = 0; |
572 | } else { | |
0865bb6f KW |
573 | uint64_t data_offset = s->header.offset_data + |
574 | (uint64_t)bmap_entry * s->block_size + | |
575 | offset_in_block; | |
576 | ||
577 | qemu_iovec_reset(&local_qiov); | |
578 | qemu_iovec_concat(&local_qiov, qiov, bytes_done, n_bytes); | |
579 | ||
a03ef88f | 580 | ret = bdrv_co_preadv(bs->file, data_offset, n_bytes, |
0865bb6f | 581 | &local_qiov, 0); |
eb9566d1 | 582 | } |
0865bb6f | 583 | logout("%u bytes read\n", n_bytes); |
0c7bfc32 | 584 | |
0865bb6f KW |
585 | bytes -= n_bytes; |
586 | offset += n_bytes; | |
587 | bytes_done += n_bytes; | |
9aebd98a | 588 | } |
3d46a75a | 589 | |
0865bb6f KW |
590 | qemu_iovec_destroy(&local_qiov); |
591 | ||
3d46a75a | 592 | return ret; |
9aebd98a SW |
593 | } |
594 | ||
fde9d56f KW |
595 | static int coroutine_fn |
596 | vdi_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes, | |
597 | QEMUIOVector *qiov, int flags) | |
9aebd98a | 598 | { |
9aebd98a | 599 | BDRVVdiState *s = bs->opaque; |
fde9d56f | 600 | QEMUIOVector local_qiov; |
9aebd98a SW |
601 | uint32_t bmap_entry; |
602 | uint32_t block_index; | |
fde9d56f KW |
603 | uint32_t offset_in_block; |
604 | uint32_t n_bytes; | |
1e886639 | 605 | uint64_t data_offset; |
bfc45fc1 PB |
606 | uint32_t bmap_first = VDI_UNALLOCATED; |
607 | uint32_t bmap_last = VDI_UNALLOCATED; | |
bfc45fc1 | 608 | uint8_t *block = NULL; |
fde9d56f | 609 | uint64_t bytes_done = 0; |
eb9566d1 | 610 | int ret = 0; |
4de659e8 PB |
611 | |
612 | logout("\n"); | |
9aebd98a | 613 | |
fde9d56f | 614 | qemu_iovec_init(&local_qiov, qiov->niov); |
9aebd98a | 615 | |
fde9d56f KW |
616 | while (ret >= 0 && bytes > 0) { |
617 | block_index = offset / s->block_size; | |
618 | offset_in_block = offset % s->block_size; | |
619 | n_bytes = MIN(bytes, s->block_size - offset_in_block); | |
620 | ||
621 | logout("will write %u bytes starting at offset %" PRIu64 "\n", | |
622 | n_bytes, offset); | |
eb9566d1 PB |
623 | |
624 | /* prepare next AIO request */ | |
1e886639 | 625 | qemu_co_rwlock_rdlock(&s->bmap_lock); |
eb9566d1 PB |
626 | bmap_entry = le32_to_cpu(s->bmap[block_index]); |
627 | if (!VDI_IS_ALLOCATED(bmap_entry)) { | |
628 | /* Allocate new block and write to it. */ | |
fde9d56f | 629 | uint64_t data_offset; |
1e886639 PB |
630 | qemu_co_rwlock_upgrade(&s->bmap_lock); |
631 | bmap_entry = le32_to_cpu(s->bmap[block_index]); | |
632 | if (VDI_IS_ALLOCATED(bmap_entry)) { | |
633 | /* A concurrent allocation did the work for us. */ | |
634 | qemu_co_rwlock_downgrade(&s->bmap_lock); | |
635 | goto nonallocating_write; | |
636 | } | |
637 | ||
eb9566d1 PB |
638 | bmap_entry = s->header.blocks_allocated; |
639 | s->bmap[block_index] = cpu_to_le32(bmap_entry); | |
640 | s->header.blocks_allocated++; | |
fde9d56f KW |
641 | data_offset = s->header.offset_data + |
642 | (uint64_t)bmap_entry * s->block_size; | |
eb9566d1 PB |
643 | if (block == NULL) { |
644 | block = g_malloc(s->block_size); | |
645 | bmap_first = block_index; | |
646 | } | |
647 | bmap_last = block_index; | |
648 | /* Copy data to be written to new block and zero unused parts. */ | |
fde9d56f KW |
649 | memset(block, 0, offset_in_block); |
650 | qemu_iovec_to_buf(qiov, bytes_done, block + offset_in_block, | |
651 | n_bytes); | |
652 | memset(block + offset_in_block + n_bytes, 0, | |
653 | s->block_size - n_bytes - offset_in_block); | |
f0ab6f10 | 654 | |
1e886639 PB |
655 | /* Write the new block under CoRwLock write-side protection, |
656 | * so this full-cluster write does not overlap a partial write | |
657 | * of the same cluster, issued from the "else" branch. | |
658 | */ | |
d9ca2ea2 | 659 | ret = bdrv_pwrite(bs->file, data_offset, block, s->block_size); |
1e886639 | 660 | qemu_co_rwlock_unlock(&s->bmap_lock); |
eb9566d1 | 661 | } else { |
1e886639 PB |
662 | nonallocating_write: |
663 | data_offset = s->header.offset_data + | |
664 | (uint64_t)bmap_entry * s->block_size + | |
665 | offset_in_block; | |
666 | qemu_co_rwlock_unlock(&s->bmap_lock); | |
fde9d56f KW |
667 | |
668 | qemu_iovec_reset(&local_qiov); | |
669 | qemu_iovec_concat(&local_qiov, qiov, bytes_done, n_bytes); | |
670 | ||
a03ef88f | 671 | ret = bdrv_co_pwritev(bs->file, data_offset, n_bytes, |
fde9d56f | 672 | &local_qiov, 0); |
9aebd98a | 673 | } |
0c7bfc32 | 674 | |
fde9d56f KW |
675 | bytes -= n_bytes; |
676 | offset += n_bytes; | |
677 | bytes_done += n_bytes; | |
0c7bfc32 | 678 | |
fde9d56f | 679 | logout("%u bytes written\n", n_bytes); |
9aebd98a | 680 | } |
9aebd98a | 681 | |
fde9d56f KW |
682 | qemu_iovec_destroy(&local_qiov); |
683 | ||
0c7bfc32 | 684 | logout("finished data write\n"); |
4eea78e6 PB |
685 | if (ret < 0) { |
686 | return ret; | |
687 | } | |
688 | ||
689 | if (block) { | |
690 | /* One or more new blocks were allocated. */ | |
691 | VdiHeader *header = (VdiHeader *) block; | |
692 | uint8_t *base; | |
693 | uint64_t offset; | |
fde9d56f | 694 | uint32_t n_sectors; |
4eea78e6 PB |
695 | |
696 | logout("now writing modified header\n"); | |
697 | assert(VDI_IS_ALLOCATED(bmap_first)); | |
698 | *header = s->header; | |
699 | vdi_header_to_le(header); | |
18d51c4b | 700 | ret = bdrv_write(bs->file, 0, block, 1); |
bfc45fc1 PB |
701 | g_free(block); |
702 | block = NULL; | |
4eea78e6 PB |
703 | |
704 | if (ret < 0) { | |
705 | return ret; | |
0c7bfc32 | 706 | } |
4eea78e6 PB |
707 | |
708 | logout("now writing modified block map entry %u...%u\n", | |
709 | bmap_first, bmap_last); | |
710 | /* Write modified sectors from block map. */ | |
711 | bmap_first /= (SECTOR_SIZE / sizeof(uint32_t)); | |
712 | bmap_last /= (SECTOR_SIZE / sizeof(uint32_t)); | |
713 | n_sectors = bmap_last - bmap_first + 1; | |
714 | offset = s->bmap_sector + bmap_first; | |
715 | base = ((uint8_t *)&s->bmap[0]) + bmap_first * SECTOR_SIZE; | |
716 | logout("will write %u block map sectors starting from entry %u\n", | |
717 | n_sectors, bmap_first); | |
18d51c4b | 718 | ret = bdrv_write(bs->file, offset, base, n_sectors); |
0c7bfc32 PB |
719 | } |
720 | ||
3d46a75a | 721 | return ret; |
9aebd98a SW |
722 | } |
723 | ||
ec73f060 | 724 | static int coroutine_fn vdi_co_do_create(BlockdevCreateOptionsVdi *vdi_opts, |
49858b50 | 725 | size_t block_size, Error **errp) |
9aebd98a | 726 | { |
dddc7750 | 727 | int ret = 0; |
9aebd98a SW |
728 | uint64_t bytes = 0; |
729 | uint32_t blocks; | |
9aebd98a SW |
730 | uint32_t image_type = VDI_TYPE_DYNAMIC; |
731 | VdiHeader header; | |
732 | size_t i; | |
733 | size_t bmap_size; | |
70747862 | 734 | int64_t offset = 0; |
ec73f060 | 735 | BlockDriverState *bs_file = NULL; |
a08f0c3b | 736 | BlockBackend *blk = NULL; |
70747862 | 737 | uint32_t *bmap = NULL; |
9aebd98a SW |
738 | |
739 | logout("\n"); | |
740 | ||
741 | /* Read out options. */ | |
49858b50 HR |
742 | bytes = vdi_opts->size; |
743 | if (vdi_opts->q_static) { | |
004b7f25 | 744 | image_type = VDI_TYPE_STATIC; |
9aebd98a | 745 | } |
49858b50 HR |
746 | #ifndef CONFIG_VDI_STATIC_IMAGE |
747 | if (image_type == VDI_TYPE_STATIC) { | |
748 | ret = -ENOTSUP; | |
749 | error_setg(errp, "Statically allocated images cannot be created in " | |
750 | "this build"); | |
751 | goto exit; | |
752 | } | |
753 | #endif | |
754 | #ifndef CONFIG_VDI_BLOCK_SIZE | |
755 | if (block_size != DEFAULT_CLUSTER_SIZE) { | |
756 | ret = -ENOTSUP; | |
757 | error_setg(errp, | |
758 | "A non-default cluster size is not supported in this build"); | |
759 | goto exit; | |
760 | } | |
004b7f25 | 761 | #endif |
9aebd98a | 762 | |
63fa06dc | 763 | if (bytes > VDI_DISK_SIZE_MAX) { |
dddc7750 | 764 | ret = -ENOTSUP; |
63fa06dc JC |
765 | error_setg(errp, "Unsupported VDI image size (size is 0x%" PRIx64 |
766 | ", max supported is 0x%" PRIx64 ")", | |
767 | bytes, VDI_DISK_SIZE_MAX); | |
768 | goto exit; | |
769 | } | |
770 | ||
ec73f060 HR |
771 | bs_file = bdrv_open_blockdev_ref(vdi_opts->file, errp); |
772 | if (!bs_file) { | |
773 | ret = -EIO; | |
63fa06dc | 774 | goto exit; |
9aebd98a | 775 | } |
a08f0c3b | 776 | |
ec73f060 HR |
777 | blk = blk_new(BLK_PERM_WRITE | BLK_PERM_RESIZE, BLK_PERM_ALL); |
778 | ret = blk_insert_bs(blk, bs_file, errp); | |
779 | if (ret < 0) { | |
70747862 | 780 | goto exit; |
4ab15590 CL |
781 | } |
782 | ||
a08f0c3b KW |
783 | blk_set_allow_write_beyond_eof(blk, true); |
784 | ||
f21dc3a4 SW |
785 | /* We need enough blocks to store the given disk size, |
786 | so always round up. */ | |
e9082e47 | 787 | blocks = DIV_ROUND_UP(bytes, block_size); |
f21dc3a4 | 788 | |
9aebd98a | 789 | bmap_size = blocks * sizeof(uint32_t); |
e9082e47 | 790 | bmap_size = ROUND_UP(bmap_size, SECTOR_SIZE); |
9aebd98a SW |
791 | |
792 | memset(&header, 0, sizeof(header)); | |
1786dc15 | 793 | pstrcpy(header.text, sizeof(header.text), VDI_TEXT); |
9aebd98a SW |
794 | header.signature = VDI_SIGNATURE; |
795 | header.version = VDI_VERSION_1_1; | |
796 | header.header_size = 0x180; | |
797 | header.image_type = image_type; | |
798 | header.offset_bmap = 0x200; | |
799 | header.offset_data = 0x200 + bmap_size; | |
800 | header.sector_size = SECTOR_SIZE; | |
801 | header.disk_size = bytes; | |
802 | header.block_size = block_size; | |
803 | header.blocks_in_image = blocks; | |
6eea90eb SW |
804 | if (image_type == VDI_TYPE_STATIC) { |
805 | header.blocks_allocated = blocks; | |
806 | } | |
7c6f55b6 FZ |
807 | qemu_uuid_generate(&header.uuid_image); |
808 | qemu_uuid_generate(&header.uuid_last_snap); | |
9aebd98a SW |
809 | /* There is no need to set header.uuid_link or header.uuid_parent here. */ |
810 | #if defined(CONFIG_VDI_DEBUG) | |
811 | vdi_header_print(&header); | |
812 | #endif | |
813 | vdi_header_to_le(&header); | |
8341f00d | 814 | ret = blk_pwrite(blk, offset, &header, sizeof(header), 0); |
dddc7750 | 815 | if (ret < 0) { |
ec73f060 | 816 | error_setg(errp, "Error writing header"); |
70747862 | 817 | goto exit; |
9aebd98a | 818 | } |
70747862 | 819 | offset += sizeof(header); |
9aebd98a | 820 | |
b76b6e95 | 821 | if (bmap_size > 0) { |
17cce735 KW |
822 | bmap = g_try_malloc0(bmap_size); |
823 | if (bmap == NULL) { | |
824 | ret = -ENOMEM; | |
825 | error_setg(errp, "Could not allocate bmap"); | |
826 | goto exit; | |
827 | } | |
514f21a5 SW |
828 | for (i = 0; i < blocks; i++) { |
829 | if (image_type == VDI_TYPE_STATIC) { | |
830 | bmap[i] = i; | |
831 | } else { | |
832 | bmap[i] = VDI_UNALLOCATED; | |
833 | } | |
9aebd98a | 834 | } |
8341f00d | 835 | ret = blk_pwrite(blk, offset, bmap, bmap_size, 0); |
dddc7750 | 836 | if (ret < 0) { |
ec73f060 | 837 | error_setg(errp, "Error writing bmap"); |
70747862 | 838 | goto exit; |
514f21a5 | 839 | } |
70747862 | 840 | offset += bmap_size; |
9aebd98a | 841 | } |
514f21a5 | 842 | |
9aebd98a | 843 | if (image_type == VDI_TYPE_STATIC) { |
3a691c50 HR |
844 | ret = blk_truncate(blk, offset + blocks * block_size, |
845 | PREALLOC_MODE_OFF, errp); | |
dddc7750 | 846 | if (ret < 0) { |
ec73f060 | 847 | error_prepend(errp, "Failed to statically allocate file"); |
70747862 | 848 | goto exit; |
9aebd98a SW |
849 | } |
850 | } | |
851 | ||
63fa06dc | 852 | exit: |
a08f0c3b | 853 | blk_unref(blk); |
ec73f060 | 854 | bdrv_unref(bs_file); |
70747862 | 855 | g_free(bmap); |
dddc7750 | 856 | return ret; |
9aebd98a SW |
857 | } |
858 | ||
49858b50 HR |
859 | static int coroutine_fn vdi_co_create_opts(const char *filename, QemuOpts *opts, |
860 | Error **errp) | |
861 | { | |
862 | QDict *qdict = NULL; | |
863 | BlockdevCreateOptionsVdi *create_options = NULL; | |
ec73f060 | 864 | BlockDriverState *bs_file = NULL; |
49858b50 HR |
865 | uint64_t block_size = DEFAULT_CLUSTER_SIZE; |
866 | Visitor *v; | |
867 | Error *local_err = NULL; | |
868 | int ret; | |
869 | ||
870 | /* Since CONFIG_VDI_BLOCK_SIZE is disabled by default, | |
871 | * cluster-size is not part of the QAPI schema; therefore we have | |
872 | * to parse it before creating the QAPI object. */ | |
873 | #if defined(CONFIG_VDI_BLOCK_SIZE) | |
874 | block_size = qemu_opt_get_size_del(opts, | |
875 | BLOCK_OPT_CLUSTER_SIZE, | |
876 | DEFAULT_CLUSTER_SIZE); | |
877 | if (block_size < BDRV_SECTOR_SIZE || block_size > UINT32_MAX || | |
878 | !is_power_of_2(block_size)) | |
879 | { | |
880 | error_setg(errp, "Invalid cluster size"); | |
881 | ret = -EINVAL; | |
882 | goto done; | |
883 | } | |
884 | #endif | |
885 | ||
886 | qdict = qemu_opts_to_qdict_filtered(opts, NULL, &vdi_create_opts, true); | |
887 | ||
ec73f060 HR |
888 | ret = bdrv_create_file(filename, opts, errp); |
889 | if (ret < 0) { | |
890 | goto done; | |
891 | } | |
892 | ||
893 | bs_file = bdrv_open(filename, NULL, NULL, | |
894 | BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL, errp); | |
895 | if (!bs_file) { | |
896 | ret = -EIO; | |
897 | goto done; | |
898 | } | |
899 | ||
900 | qdict_put_str(qdict, "file", bs_file->node_name); | |
49858b50 HR |
901 | |
902 | /* Get the QAPI object */ | |
903 | v = qobject_input_visitor_new_keyval(QOBJECT(qdict)); | |
904 | visit_type_BlockdevCreateOptionsVdi(v, NULL, &create_options, &local_err); | |
905 | visit_free(v); | |
906 | ||
907 | if (local_err) { | |
908 | error_propagate(errp, local_err); | |
909 | ret = -EINVAL; | |
910 | goto done; | |
911 | } | |
912 | ||
913 | create_options->size = ROUND_UP(create_options->size, BDRV_SECTOR_SIZE); | |
914 | ||
ec73f060 | 915 | ret = vdi_co_do_create(create_options, block_size, errp); |
49858b50 HR |
916 | done: |
917 | QDECREF(qdict); | |
918 | qapi_free_BlockdevCreateOptionsVdi(create_options); | |
ec73f060 | 919 | bdrv_unref(bs_file); |
49858b50 HR |
920 | return ret; |
921 | } | |
922 | ||
9aebd98a SW |
923 | static void vdi_close(BlockDriverState *bs) |
924 | { | |
fc9d106c | 925 | BDRVVdiState *s = bs->opaque; |
6ac5f388 | 926 | |
17cce735 | 927 | qemu_vfree(s->bmap); |
6ac5f388 | 928 | |
fc9d106c KW |
929 | migrate_del_blocker(s->migration_blocker); |
930 | error_free(s->migration_blocker); | |
9aebd98a SW |
931 | } |
932 | ||
004b7f25 CL |
933 | static QemuOptsList vdi_create_opts = { |
934 | .name = "vdi-create-opts", | |
935 | .head = QTAILQ_HEAD_INITIALIZER(vdi_create_opts.head), | |
936 | .desc = { | |
937 | { | |
938 | .name = BLOCK_OPT_SIZE, | |
939 | .type = QEMU_OPT_SIZE, | |
940 | .help = "Virtual disk size" | |
941 | }, | |
9aebd98a | 942 | #if defined(CONFIG_VDI_BLOCK_SIZE) |
004b7f25 CL |
943 | { |
944 | .name = BLOCK_OPT_CLUSTER_SIZE, | |
945 | .type = QEMU_OPT_SIZE, | |
946 | .help = "VDI cluster (block) size", | |
947 | .def_value_str = stringify(DEFAULT_CLUSTER_SIZE) | |
948 | }, | |
9aebd98a SW |
949 | #endif |
950 | #if defined(CONFIG_VDI_STATIC_IMAGE) | |
004b7f25 CL |
951 | { |
952 | .name = BLOCK_OPT_STATIC, | |
953 | .type = QEMU_OPT_BOOL, | |
954 | .help = "VDI static (pre-allocated) image", | |
955 | .def_value_str = "off" | |
956 | }, | |
9aebd98a | 957 | #endif |
004b7f25 CL |
958 | /* TODO: An additional option to set UUID values might be useful. */ |
959 | { /* end of list */ } | |
960 | } | |
9aebd98a SW |
961 | }; |
962 | ||
963 | static BlockDriver bdrv_vdi = { | |
964 | .format_name = "vdi", | |
965 | .instance_size = sizeof(BDRVVdiState), | |
966 | .bdrv_probe = vdi_probe, | |
967 | .bdrv_open = vdi_open, | |
968 | .bdrv_close = vdi_close, | |
ecfe2bba | 969 | .bdrv_reopen_prepare = vdi_reopen_prepare, |
862f215f | 970 | .bdrv_child_perm = bdrv_format_default_perms, |
efc75e2a | 971 | .bdrv_co_create_opts = vdi_co_create_opts, |
3ac21627 | 972 | .bdrv_has_zero_init = bdrv_has_zero_init_1, |
67635f6a | 973 | .bdrv_co_block_status = vdi_co_block_status, |
9aebd98a SW |
974 | .bdrv_make_empty = vdi_make_empty, |
975 | ||
0865bb6f | 976 | .bdrv_co_preadv = vdi_co_preadv, |
9aebd98a | 977 | #if defined(CONFIG_VDI_WRITE) |
fde9d56f | 978 | .bdrv_co_pwritev = vdi_co_pwritev, |
9aebd98a SW |
979 | #endif |
980 | ||
981 | .bdrv_get_info = vdi_get_info, | |
982 | ||
004b7f25 | 983 | .create_opts = &vdi_create_opts, |
2fd61638 | 984 | .bdrv_co_check = vdi_co_check, |
9aebd98a SW |
985 | }; |
986 | ||
987 | static void bdrv_vdi_init(void) | |
988 | { | |
989 | logout("\n"); | |
990 | bdrv_register(&bdrv_vdi); | |
991 | } | |
992 | ||
993 | block_init(bdrv_vdi_init); |