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Commit | Line | Data |
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ea2384d3 FB |
1 | /* |
2 | * Block driver for the VMDK format | |
5fafdf24 | 3 | * |
ea2384d3 | 4 | * Copyright (c) 2004 Fabrice Bellard |
ff1afc72 | 5 | * Copyright (c) 2005 Filip Navara |
5fafdf24 | 6 | * |
ea2384d3 FB |
7 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
8 | * of this software and associated documentation files (the "Software"), to deal | |
9 | * in the Software without restriction, including without limitation the rights | |
10 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
11 | * copies of the Software, and to permit persons to whom the Software is | |
12 | * furnished to do so, subject to the following conditions: | |
13 | * | |
14 | * The above copyright notice and this permission notice shall be included in | |
15 | * all copies or substantial portions of the Software. | |
16 | * | |
17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
20 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
22 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
23 | * THE SOFTWARE. | |
24 | */ | |
5f4da8c0 | 25 | |
faf07963 | 26 | #include "qemu-common.h" |
ea2384d3 | 27 | #include "block_int.h" |
5efa9d5a | 28 | #include "module.h" |
432bb170 | 29 | #include "zlib.h" |
ea2384d3 | 30 | |
ea2384d3 FB |
31 | #define VMDK3_MAGIC (('C' << 24) | ('O' << 16) | ('W' << 8) | 'D') |
32 | #define VMDK4_MAGIC (('K' << 24) | ('D' << 16) | ('M' << 8) | 'V') | |
432bb170 | 33 | #define VMDK4_COMPRESSION_DEFLATE 1 |
bb45ded9 | 34 | #define VMDK4_FLAG_RGD (1 << 1) |
432bb170 FZ |
35 | #define VMDK4_FLAG_COMPRESS (1 << 16) |
36 | #define VMDK4_FLAG_MARKER (1 << 17) | |
ea2384d3 FB |
37 | |
38 | typedef struct { | |
39 | uint32_t version; | |
40 | uint32_t flags; | |
41 | uint32_t disk_sectors; | |
42 | uint32_t granularity; | |
43 | uint32_t l1dir_offset; | |
44 | uint32_t l1dir_size; | |
45 | uint32_t file_sectors; | |
46 | uint32_t cylinders; | |
47 | uint32_t heads; | |
48 | uint32_t sectors_per_track; | |
49 | } VMDK3Header; | |
50 | ||
51 | typedef struct { | |
52 | uint32_t version; | |
53 | uint32_t flags; | |
54 | int64_t capacity; | |
55 | int64_t granularity; | |
56 | int64_t desc_offset; | |
57 | int64_t desc_size; | |
58 | int32_t num_gtes_per_gte; | |
ea2384d3 | 59 | int64_t gd_offset; |
bb45ded9 | 60 | int64_t rgd_offset; |
ea2384d3 FB |
61 | int64_t grain_offset; |
62 | char filler[1]; | |
63 | char check_bytes[4]; | |
432bb170 | 64 | uint16_t compressAlgorithm; |
541dc0d4 | 65 | } QEMU_PACKED VMDK4Header; |
ea2384d3 FB |
66 | |
67 | #define L2_CACHE_SIZE 16 | |
68 | ||
b3976d3c FZ |
69 | typedef struct VmdkExtent { |
70 | BlockDriverState *file; | |
71 | bool flat; | |
432bb170 FZ |
72 | bool compressed; |
73 | bool has_marker; | |
b3976d3c FZ |
74 | int64_t sectors; |
75 | int64_t end_sector; | |
7fa60fa3 | 76 | int64_t flat_start_offset; |
ea2384d3 | 77 | int64_t l1_table_offset; |
ff1afc72 | 78 | int64_t l1_backup_table_offset; |
ea2384d3 | 79 | uint32_t *l1_table; |
ff1afc72 | 80 | uint32_t *l1_backup_table; |
ea2384d3 FB |
81 | unsigned int l1_size; |
82 | uint32_t l1_entry_sectors; | |
83 | ||
84 | unsigned int l2_size; | |
85 | uint32_t *l2_cache; | |
86 | uint32_t l2_cache_offsets[L2_CACHE_SIZE]; | |
87 | uint32_t l2_cache_counts[L2_CACHE_SIZE]; | |
88 | ||
89 | unsigned int cluster_sectors; | |
b3976d3c FZ |
90 | } VmdkExtent; |
91 | ||
92 | typedef struct BDRVVmdkState { | |
e1da9b24 | 93 | int desc_offset; |
69b4d86d | 94 | bool cid_updated; |
5f4da8c0 | 95 | uint32_t parent_cid; |
b3976d3c FZ |
96 | int num_extents; |
97 | /* Extent array with num_extents entries, ascend ordered by address */ | |
98 | VmdkExtent *extents; | |
ea2384d3 FB |
99 | } BDRVVmdkState; |
100 | ||
630530a6 TS |
101 | typedef struct VmdkMetaData { |
102 | uint32_t offset; | |
103 | unsigned int l1_index; | |
104 | unsigned int l2_index; | |
105 | unsigned int l2_offset; | |
106 | int valid; | |
107 | } VmdkMetaData; | |
108 | ||
432bb170 FZ |
109 | typedef struct VmdkGrainMarker { |
110 | uint64_t lba; | |
111 | uint32_t size; | |
112 | uint8_t data[0]; | |
113 | } VmdkGrainMarker; | |
114 | ||
ea2384d3 FB |
115 | static int vmdk_probe(const uint8_t *buf, int buf_size, const char *filename) |
116 | { | |
117 | uint32_t magic; | |
118 | ||
ae261c86 | 119 | if (buf_size < 4) { |
ea2384d3 | 120 | return 0; |
ae261c86 | 121 | } |
ea2384d3 FB |
122 | magic = be32_to_cpu(*(uint32_t *)buf); |
123 | if (magic == VMDK3_MAGIC || | |
01fc99d6 | 124 | magic == VMDK4_MAGIC) { |
ea2384d3 | 125 | return 100; |
01fc99d6 FZ |
126 | } else { |
127 | const char *p = (const char *)buf; | |
128 | const char *end = p + buf_size; | |
129 | while (p < end) { | |
130 | if (*p == '#') { | |
131 | /* skip comment line */ | |
132 | while (p < end && *p != '\n') { | |
133 | p++; | |
134 | } | |
135 | p++; | |
136 | continue; | |
137 | } | |
138 | if (*p == ' ') { | |
139 | while (p < end && *p == ' ') { | |
140 | p++; | |
141 | } | |
142 | /* skip '\r' if windows line endings used. */ | |
143 | if (p < end && *p == '\r') { | |
144 | p++; | |
145 | } | |
146 | /* only accept blank lines before 'version=' line */ | |
147 | if (p == end || *p != '\n') { | |
148 | return 0; | |
149 | } | |
150 | p++; | |
151 | continue; | |
152 | } | |
153 | if (end - p >= strlen("version=X\n")) { | |
154 | if (strncmp("version=1\n", p, strlen("version=1\n")) == 0 || | |
155 | strncmp("version=2\n", p, strlen("version=2\n")) == 0) { | |
156 | return 100; | |
157 | } | |
158 | } | |
159 | if (end - p >= strlen("version=X\r\n")) { | |
160 | if (strncmp("version=1\r\n", p, strlen("version=1\r\n")) == 0 || | |
161 | strncmp("version=2\r\n", p, strlen("version=2\r\n")) == 0) { | |
162 | return 100; | |
163 | } | |
164 | } | |
165 | return 0; | |
166 | } | |
ea2384d3 | 167 | return 0; |
01fc99d6 | 168 | } |
ea2384d3 FB |
169 | } |
170 | ||
5f4da8c0 TS |
171 | #define CHECK_CID 1 |
172 | ||
3b46e624 | 173 | #define SECTOR_SIZE 512 |
f66fd6c3 FZ |
174 | #define DESC_SIZE (20 * SECTOR_SIZE) /* 20 sectors of 512 bytes each */ |
175 | #define BUF_SIZE 4096 | |
176 | #define HEADER_SIZE 512 /* first sector of 512 bytes */ | |
5f4da8c0 | 177 | |
b3976d3c FZ |
178 | static void vmdk_free_extents(BlockDriverState *bs) |
179 | { | |
180 | int i; | |
181 | BDRVVmdkState *s = bs->opaque; | |
b3c0bfb6 | 182 | VmdkExtent *e; |
b3976d3c FZ |
183 | |
184 | for (i = 0; i < s->num_extents; i++) { | |
b3c0bfb6 FZ |
185 | e = &s->extents[i]; |
186 | g_free(e->l1_table); | |
187 | g_free(e->l2_cache); | |
188 | g_free(e->l1_backup_table); | |
189 | if (e->file != bs->file) { | |
190 | bdrv_delete(e->file); | |
191 | } | |
b3976d3c | 192 | } |
7267c094 | 193 | g_free(s->extents); |
b3976d3c FZ |
194 | } |
195 | ||
86c6b429 FZ |
196 | static void vmdk_free_last_extent(BlockDriverState *bs) |
197 | { | |
198 | BDRVVmdkState *s = bs->opaque; | |
199 | ||
200 | if (s->num_extents == 0) { | |
201 | return; | |
202 | } | |
203 | s->num_extents--; | |
204 | s->extents = g_realloc(s->extents, s->num_extents * sizeof(VmdkExtent)); | |
205 | } | |
206 | ||
5f4da8c0 | 207 | static uint32_t vmdk_read_cid(BlockDriverState *bs, int parent) |
ea2384d3 | 208 | { |
5f4da8c0 TS |
209 | char desc[DESC_SIZE]; |
210 | uint32_t cid; | |
7ccfb2eb | 211 | const char *p_name, *cid_str; |
5f4da8c0 | 212 | size_t cid_str_size; |
e1da9b24 | 213 | BDRVVmdkState *s = bs->opaque; |
5f4da8c0 | 214 | |
e1da9b24 | 215 | if (bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE) != DESC_SIZE) { |
5f4da8c0 | 216 | return 0; |
e1da9b24 | 217 | } |
5f4da8c0 TS |
218 | |
219 | if (parent) { | |
220 | cid_str = "parentCID"; | |
221 | cid_str_size = sizeof("parentCID"); | |
222 | } else { | |
223 | cid_str = "CID"; | |
224 | cid_str_size = sizeof("CID"); | |
225 | } | |
226 | ||
ae261c86 FZ |
227 | p_name = strstr(desc, cid_str); |
228 | if (p_name != NULL) { | |
5f4da8c0 | 229 | p_name += cid_str_size; |
ae261c86 | 230 | sscanf(p_name, "%x", &cid); |
5f4da8c0 TS |
231 | } |
232 | ||
233 | return cid; | |
234 | } | |
235 | ||
236 | static int vmdk_write_cid(BlockDriverState *bs, uint32_t cid) | |
237 | { | |
5f4da8c0 TS |
238 | char desc[DESC_SIZE], tmp_desc[DESC_SIZE]; |
239 | char *p_name, *tmp_str; | |
e1da9b24 | 240 | BDRVVmdkState *s = bs->opaque; |
5f4da8c0 | 241 | |
e1da9b24 FZ |
242 | memset(desc, 0, sizeof(desc)); |
243 | if (bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE) != DESC_SIZE) { | |
244 | return -EIO; | |
245 | } | |
5f4da8c0 | 246 | |
ae261c86 | 247 | tmp_str = strstr(desc, "parentCID"); |
363a37d5 | 248 | pstrcpy(tmp_desc, sizeof(tmp_desc), tmp_str); |
ae261c86 FZ |
249 | p_name = strstr(desc, "CID"); |
250 | if (p_name != NULL) { | |
5f4da8c0 | 251 | p_name += sizeof("CID"); |
363a37d5 BS |
252 | snprintf(p_name, sizeof(desc) - (p_name - desc), "%x\n", cid); |
253 | pstrcat(desc, sizeof(desc), tmp_desc); | |
5f4da8c0 TS |
254 | } |
255 | ||
e1da9b24 FZ |
256 | if (bdrv_pwrite_sync(bs->file, s->desc_offset, desc, DESC_SIZE) < 0) { |
257 | return -EIO; | |
258 | } | |
5f4da8c0 TS |
259 | return 0; |
260 | } | |
261 | ||
262 | static int vmdk_is_cid_valid(BlockDriverState *bs) | |
263 | { | |
264 | #ifdef CHECK_CID | |
265 | BDRVVmdkState *s = bs->opaque; | |
b171271a | 266 | BlockDriverState *p_bs = bs->backing_hd; |
5f4da8c0 TS |
267 | uint32_t cur_pcid; |
268 | ||
269 | if (p_bs) { | |
ae261c86 FZ |
270 | cur_pcid = vmdk_read_cid(p_bs, 0); |
271 | if (s->parent_cid != cur_pcid) { | |
272 | /* CID not valid */ | |
5f4da8c0 | 273 | return 0; |
ae261c86 | 274 | } |
5f4da8c0 TS |
275 | } |
276 | #endif | |
ae261c86 | 277 | /* CID valid */ |
5f4da8c0 TS |
278 | return 1; |
279 | } | |
280 | ||
9949f97e | 281 | static int vmdk_parent_open(BlockDriverState *bs) |
5f4da8c0 | 282 | { |
5fafdf24 | 283 | char *p_name; |
7fa60fa3 | 284 | char desc[DESC_SIZE + 1]; |
e1da9b24 | 285 | BDRVVmdkState *s = bs->opaque; |
5f4da8c0 | 286 | |
7fa60fa3 | 287 | desc[DESC_SIZE] = '\0'; |
e1da9b24 | 288 | if (bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE) != DESC_SIZE) { |
5f4da8c0 | 289 | return -1; |
e1da9b24 | 290 | } |
5f4da8c0 | 291 | |
ae261c86 FZ |
292 | p_name = strstr(desc, "parentFileNameHint"); |
293 | if (p_name != NULL) { | |
5f4da8c0 | 294 | char *end_name; |
5f4da8c0 TS |
295 | |
296 | p_name += sizeof("parentFileNameHint") + 1; | |
ae261c86 FZ |
297 | end_name = strchr(p_name, '\"'); |
298 | if (end_name == NULL) { | |
5f4da8c0 | 299 | return -1; |
ae261c86 FZ |
300 | } |
301 | if ((end_name - p_name) > sizeof(bs->backing_file) - 1) { | |
b34d259a | 302 | return -1; |
ae261c86 | 303 | } |
3b46e624 | 304 | |
b171271a | 305 | pstrcpy(bs->backing_file, end_name - p_name + 1, p_name); |
ff1afc72 | 306 | } |
5f4da8c0 TS |
307 | |
308 | return 0; | |
309 | } | |
310 | ||
b3976d3c FZ |
311 | /* Create and append extent to the extent array. Return the added VmdkExtent |
312 | * address. return NULL if allocation failed. */ | |
313 | static VmdkExtent *vmdk_add_extent(BlockDriverState *bs, | |
314 | BlockDriverState *file, bool flat, int64_t sectors, | |
315 | int64_t l1_offset, int64_t l1_backup_offset, | |
316 | uint32_t l1_size, | |
317 | int l2_size, unsigned int cluster_sectors) | |
318 | { | |
319 | VmdkExtent *extent; | |
320 | BDRVVmdkState *s = bs->opaque; | |
321 | ||
7267c094 | 322 | s->extents = g_realloc(s->extents, |
b3976d3c FZ |
323 | (s->num_extents + 1) * sizeof(VmdkExtent)); |
324 | extent = &s->extents[s->num_extents]; | |
325 | s->num_extents++; | |
326 | ||
327 | memset(extent, 0, sizeof(VmdkExtent)); | |
328 | extent->file = file; | |
329 | extent->flat = flat; | |
330 | extent->sectors = sectors; | |
331 | extent->l1_table_offset = l1_offset; | |
332 | extent->l1_backup_table_offset = l1_backup_offset; | |
333 | extent->l1_size = l1_size; | |
334 | extent->l1_entry_sectors = l2_size * cluster_sectors; | |
335 | extent->l2_size = l2_size; | |
336 | extent->cluster_sectors = cluster_sectors; | |
337 | ||
338 | if (s->num_extents > 1) { | |
339 | extent->end_sector = (*(extent - 1)).end_sector + extent->sectors; | |
340 | } else { | |
341 | extent->end_sector = extent->sectors; | |
342 | } | |
343 | bs->total_sectors = extent->end_sector; | |
344 | return extent; | |
345 | } | |
346 | ||
b4b3ab14 | 347 | static int vmdk_init_tables(BlockDriverState *bs, VmdkExtent *extent) |
5f4da8c0 | 348 | { |
b4b3ab14 FZ |
349 | int ret; |
350 | int l1_size, i; | |
5f4da8c0 | 351 | |
ea2384d3 | 352 | /* read the L1 table */ |
b3976d3c | 353 | l1_size = extent->l1_size * sizeof(uint32_t); |
7267c094 | 354 | extent->l1_table = g_malloc(l1_size); |
b4b3ab14 FZ |
355 | ret = bdrv_pread(extent->file, |
356 | extent->l1_table_offset, | |
357 | extent->l1_table, | |
358 | l1_size); | |
359 | if (ret < 0) { | |
360 | goto fail_l1; | |
b3976d3c FZ |
361 | } |
362 | for (i = 0; i < extent->l1_size; i++) { | |
363 | le32_to_cpus(&extent->l1_table[i]); | |
ea2384d3 FB |
364 | } |
365 | ||
b3976d3c | 366 | if (extent->l1_backup_table_offset) { |
7267c094 | 367 | extent->l1_backup_table = g_malloc(l1_size); |
b4b3ab14 FZ |
368 | ret = bdrv_pread(extent->file, |
369 | extent->l1_backup_table_offset, | |
370 | extent->l1_backup_table, | |
371 | l1_size); | |
372 | if (ret < 0) { | |
373 | goto fail_l1b; | |
b3976d3c FZ |
374 | } |
375 | for (i = 0; i < extent->l1_size; i++) { | |
376 | le32_to_cpus(&extent->l1_backup_table[i]); | |
ff1afc72 FB |
377 | } |
378 | } | |
379 | ||
b3976d3c | 380 | extent->l2_cache = |
7267c094 | 381 | g_malloc(extent->l2_size * L2_CACHE_SIZE * sizeof(uint32_t)); |
ea2384d3 | 382 | return 0; |
b4b3ab14 | 383 | fail_l1b: |
7267c094 | 384 | g_free(extent->l1_backup_table); |
b4b3ab14 | 385 | fail_l1: |
7267c094 | 386 | g_free(extent->l1_table); |
b4b3ab14 FZ |
387 | return ret; |
388 | } | |
389 | ||
86c6b429 FZ |
390 | static int vmdk_open_vmdk3(BlockDriverState *bs, |
391 | BlockDriverState *file, | |
392 | int flags) | |
b4b3ab14 FZ |
393 | { |
394 | int ret; | |
395 | uint32_t magic; | |
396 | VMDK3Header header; | |
397 | VmdkExtent *extent; | |
398 | ||
86c6b429 | 399 | ret = bdrv_pread(file, sizeof(magic), &header, sizeof(header)); |
b4b3ab14 | 400 | if (ret < 0) { |
86c6b429 | 401 | return ret; |
b4b3ab14 FZ |
402 | } |
403 | extent = vmdk_add_extent(bs, | |
404 | bs->file, false, | |
405 | le32_to_cpu(header.disk_sectors), | |
406 | le32_to_cpu(header.l1dir_offset) << 9, | |
407 | 0, 1 << 6, 1 << 9, | |
408 | le32_to_cpu(header.granularity)); | |
409 | ret = vmdk_init_tables(bs, extent); | |
410 | if (ret) { | |
86c6b429 FZ |
411 | /* free extent allocated by vmdk_add_extent */ |
412 | vmdk_free_last_extent(bs); | |
b4b3ab14 | 413 | } |
b4b3ab14 FZ |
414 | return ret; |
415 | } | |
416 | ||
f16f509d FZ |
417 | static int vmdk_open_desc_file(BlockDriverState *bs, int flags, |
418 | int64_t desc_offset); | |
419 | ||
86c6b429 FZ |
420 | static int vmdk_open_vmdk4(BlockDriverState *bs, |
421 | BlockDriverState *file, | |
422 | int flags) | |
b4b3ab14 FZ |
423 | { |
424 | int ret; | |
425 | uint32_t magic; | |
426 | uint32_t l1_size, l1_entry_sectors; | |
427 | VMDK4Header header; | |
b4b3ab14 | 428 | VmdkExtent *extent; |
bb45ded9 | 429 | int64_t l1_backup_offset = 0; |
b4b3ab14 | 430 | |
86c6b429 | 431 | ret = bdrv_pread(file, sizeof(magic), &header, sizeof(header)); |
b4b3ab14 | 432 | if (ret < 0) { |
86c6b429 | 433 | return ret; |
b4b3ab14 | 434 | } |
f16f509d FZ |
435 | if (header.capacity == 0 && header.desc_offset) { |
436 | return vmdk_open_desc_file(bs, flags, header.desc_offset << 9); | |
437 | } | |
b4b3ab14 FZ |
438 | l1_entry_sectors = le32_to_cpu(header.num_gtes_per_gte) |
439 | * le64_to_cpu(header.granularity); | |
86c6b429 FZ |
440 | if (l1_entry_sectors <= 0) { |
441 | return -EINVAL; | |
442 | } | |
b4b3ab14 FZ |
443 | l1_size = (le64_to_cpu(header.capacity) + l1_entry_sectors - 1) |
444 | / l1_entry_sectors; | |
bb45ded9 FZ |
445 | if (le32_to_cpu(header.flags) & VMDK4_FLAG_RGD) { |
446 | l1_backup_offset = le64_to_cpu(header.rgd_offset) << 9; | |
447 | } | |
86c6b429 | 448 | extent = vmdk_add_extent(bs, file, false, |
b4b3ab14 FZ |
449 | le64_to_cpu(header.capacity), |
450 | le64_to_cpu(header.gd_offset) << 9, | |
bb45ded9 | 451 | l1_backup_offset, |
b4b3ab14 FZ |
452 | l1_size, |
453 | le32_to_cpu(header.num_gtes_per_gte), | |
454 | le64_to_cpu(header.granularity)); | |
432bb170 FZ |
455 | extent->compressed = |
456 | le16_to_cpu(header.compressAlgorithm) == VMDK4_COMPRESSION_DEFLATE; | |
457 | extent->has_marker = le32_to_cpu(header.flags) & VMDK4_FLAG_MARKER; | |
b4b3ab14 FZ |
458 | ret = vmdk_init_tables(bs, extent); |
459 | if (ret) { | |
86c6b429 FZ |
460 | /* free extent allocated by vmdk_add_extent */ |
461 | vmdk_free_last_extent(bs); | |
b4b3ab14 | 462 | } |
b4b3ab14 FZ |
463 | return ret; |
464 | } | |
465 | ||
7fa60fa3 FZ |
466 | /* find an option value out of descriptor file */ |
467 | static int vmdk_parse_description(const char *desc, const char *opt_name, | |
468 | char *buf, int buf_size) | |
469 | { | |
470 | char *opt_pos, *opt_end; | |
471 | const char *end = desc + strlen(desc); | |
472 | ||
473 | opt_pos = strstr(desc, opt_name); | |
474 | if (!opt_pos) { | |
475 | return -1; | |
476 | } | |
477 | /* Skip "=\"" following opt_name */ | |
478 | opt_pos += strlen(opt_name) + 2; | |
479 | if (opt_pos >= end) { | |
480 | return -1; | |
481 | } | |
482 | opt_end = opt_pos; | |
483 | while (opt_end < end && *opt_end != '"') { | |
484 | opt_end++; | |
485 | } | |
486 | if (opt_end == end || buf_size < opt_end - opt_pos + 1) { | |
487 | return -1; | |
488 | } | |
489 | pstrcpy(buf, opt_end - opt_pos + 1, opt_pos); | |
490 | return 0; | |
491 | } | |
492 | ||
86c6b429 FZ |
493 | /* Open an extent file and append to bs array */ |
494 | static int vmdk_open_sparse(BlockDriverState *bs, | |
495 | BlockDriverState *file, | |
496 | int flags) | |
497 | { | |
498 | uint32_t magic; | |
499 | ||
500 | if (bdrv_pread(file, 0, &magic, sizeof(magic)) != sizeof(magic)) { | |
501 | return -EIO; | |
502 | } | |
503 | ||
504 | magic = be32_to_cpu(magic); | |
505 | switch (magic) { | |
506 | case VMDK3_MAGIC: | |
507 | return vmdk_open_vmdk3(bs, file, flags); | |
508 | break; | |
509 | case VMDK4_MAGIC: | |
510 | return vmdk_open_vmdk4(bs, file, flags); | |
511 | break; | |
512 | default: | |
513 | return -EINVAL; | |
514 | break; | |
515 | } | |
516 | } | |
517 | ||
7fa60fa3 FZ |
518 | static int vmdk_parse_extents(const char *desc, BlockDriverState *bs, |
519 | const char *desc_file_path) | |
520 | { | |
521 | int ret; | |
522 | char access[11]; | |
523 | char type[11]; | |
524 | char fname[512]; | |
525 | const char *p = desc; | |
526 | int64_t sectors = 0; | |
527 | int64_t flat_offset; | |
86c6b429 FZ |
528 | char extent_path[PATH_MAX]; |
529 | BlockDriverState *extent_file; | |
7fa60fa3 FZ |
530 | |
531 | while (*p) { | |
532 | /* parse extent line: | |
533 | * RW [size in sectors] FLAT "file-name.vmdk" OFFSET | |
534 | * or | |
535 | * RW [size in sectors] SPARSE "file-name.vmdk" | |
536 | */ | |
537 | flat_offset = -1; | |
538 | ret = sscanf(p, "%10s %" SCNd64 " %10s %511s %" SCNd64, | |
539 | access, §ors, type, fname, &flat_offset); | |
540 | if (ret < 4 || strcmp(access, "RW")) { | |
541 | goto next_line; | |
542 | } else if (!strcmp(type, "FLAT")) { | |
543 | if (ret != 5 || flat_offset < 0) { | |
544 | return -EINVAL; | |
545 | } | |
546 | } else if (ret != 4) { | |
547 | return -EINVAL; | |
548 | } | |
549 | ||
550 | /* trim the quotation marks around */ | |
551 | if (fname[0] == '"') { | |
552 | memmove(fname, fname + 1, strlen(fname)); | |
553 | if (strlen(fname) <= 1 || fname[strlen(fname) - 1] != '"') { | |
554 | return -EINVAL; | |
555 | } | |
556 | fname[strlen(fname) - 1] = '\0'; | |
557 | } | |
558 | if (sectors <= 0 || | |
559 | (strcmp(type, "FLAT") && strcmp(type, "SPARSE")) || | |
560 | (strcmp(access, "RW"))) { | |
561 | goto next_line; | |
562 | } | |
563 | ||
86c6b429 FZ |
564 | path_combine(extent_path, sizeof(extent_path), |
565 | desc_file_path, fname); | |
566 | ret = bdrv_file_open(&extent_file, extent_path, bs->open_flags); | |
567 | if (ret) { | |
568 | return ret; | |
569 | } | |
570 | ||
7fa60fa3 FZ |
571 | /* save to extents array */ |
572 | if (!strcmp(type, "FLAT")) { | |
573 | /* FLAT extent */ | |
7fa60fa3 FZ |
574 | VmdkExtent *extent; |
575 | ||
7fa60fa3 FZ |
576 | extent = vmdk_add_extent(bs, extent_file, true, sectors, |
577 | 0, 0, 0, 0, sectors); | |
f16f509d | 578 | extent->flat_start_offset = flat_offset << 9; |
86c6b429 FZ |
579 | } else if (!strcmp(type, "SPARSE")) { |
580 | /* SPARSE extent */ | |
581 | ret = vmdk_open_sparse(bs, extent_file, bs->open_flags); | |
582 | if (ret) { | |
583 | bdrv_delete(extent_file); | |
584 | return ret; | |
585 | } | |
7fa60fa3 | 586 | } else { |
7fa60fa3 FZ |
587 | fprintf(stderr, |
588 | "VMDK: Not supported extent type \"%s\""".\n", type); | |
589 | return -ENOTSUP; | |
590 | } | |
591 | next_line: | |
592 | /* move to next line */ | |
593 | while (*p && *p != '\n') { | |
594 | p++; | |
595 | } | |
596 | p++; | |
597 | } | |
598 | return 0; | |
599 | } | |
600 | ||
f16f509d FZ |
601 | static int vmdk_open_desc_file(BlockDriverState *bs, int flags, |
602 | int64_t desc_offset) | |
7fa60fa3 FZ |
603 | { |
604 | int ret; | |
605 | char buf[2048]; | |
606 | char ct[128]; | |
607 | BDRVVmdkState *s = bs->opaque; | |
608 | ||
f16f509d | 609 | ret = bdrv_pread(bs->file, desc_offset, buf, sizeof(buf)); |
7fa60fa3 FZ |
610 | if (ret < 0) { |
611 | return ret; | |
612 | } | |
613 | buf[2047] = '\0'; | |
614 | if (vmdk_parse_description(buf, "createType", ct, sizeof(ct))) { | |
615 | return -EINVAL; | |
616 | } | |
6398de51 | 617 | if (strcmp(ct, "monolithicFlat") && |
86c6b429 | 618 | strcmp(ct, "twoGbMaxExtentSparse") && |
6398de51 | 619 | strcmp(ct, "twoGbMaxExtentFlat")) { |
7fa60fa3 FZ |
620 | fprintf(stderr, |
621 | "VMDK: Not supported image type \"%s\""".\n", ct); | |
622 | return -ENOTSUP; | |
623 | } | |
624 | s->desc_offset = 0; | |
625 | ret = vmdk_parse_extents(buf, bs, bs->file->filename); | |
626 | if (ret) { | |
b3c0bfb6 | 627 | vmdk_free_extents(bs); |
7fa60fa3 FZ |
628 | return ret; |
629 | } | |
630 | ||
631 | /* try to open parent images, if exist */ | |
632 | if (vmdk_parent_open(bs)) { | |
b3c0bfb6 | 633 | vmdk_free_extents(bs); |
7fa60fa3 FZ |
634 | return -EINVAL; |
635 | } | |
636 | s->parent_cid = vmdk_read_cid(bs, 1); | |
637 | return 0; | |
638 | } | |
639 | ||
b4b3ab14 FZ |
640 | static int vmdk_open(BlockDriverState *bs, int flags) |
641 | { | |
86c6b429 FZ |
642 | int ret; |
643 | BDRVVmdkState *s = bs->opaque; | |
b4b3ab14 | 644 | |
86c6b429 FZ |
645 | if (vmdk_open_sparse(bs, bs->file, flags) == 0) { |
646 | s->desc_offset = 0x200; | |
647 | /* try to open parent images, if exist */ | |
648 | ret = vmdk_parent_open(bs); | |
649 | if (ret) { | |
650 | vmdk_free_extents(bs); | |
651 | return ret; | |
652 | } | |
653 | s->parent_cid = vmdk_read_cid(bs, 1); | |
654 | return 0; | |
b4b3ab14 | 655 | } else { |
f16f509d | 656 | return vmdk_open_desc_file(bs, flags, 0); |
b4b3ab14 | 657 | } |
ea2384d3 FB |
658 | } |
659 | ||
b3976d3c FZ |
660 | static int get_whole_cluster(BlockDriverState *bs, |
661 | VmdkExtent *extent, | |
662 | uint64_t cluster_offset, | |
663 | uint64_t offset, | |
664 | bool allocate) | |
5f4da8c0 | 665 | { |
b3976d3c FZ |
666 | /* 128 sectors * 512 bytes each = grain size 64KB */ |
667 | uint8_t whole_grain[extent->cluster_sectors * 512]; | |
5f4da8c0 | 668 | |
0e69c543 FZ |
669 | /* we will be here if it's first write on non-exist grain(cluster). |
670 | * try to read from parent image, if exist */ | |
b171271a | 671 | if (bs->backing_hd) { |
c336500d | 672 | int ret; |
5f4da8c0 | 673 | |
ae261c86 | 674 | if (!vmdk_is_cid_valid(bs)) { |
5f4da8c0 | 675 | return -1; |
ae261c86 | 676 | } |
5f4da8c0 | 677 | |
0e69c543 FZ |
678 | /* floor offset to cluster */ |
679 | offset -= offset % (extent->cluster_sectors * 512); | |
c336500d | 680 | ret = bdrv_read(bs->backing_hd, offset >> 9, whole_grain, |
b3976d3c | 681 | extent->cluster_sectors); |
c336500d KW |
682 | if (ret < 0) { |
683 | return -1; | |
684 | } | |
630530a6 | 685 | |
0e69c543 | 686 | /* Write grain only into the active image */ |
b3976d3c FZ |
687 | ret = bdrv_write(extent->file, cluster_offset, whole_grain, |
688 | extent->cluster_sectors); | |
c336500d KW |
689 | if (ret < 0) { |
690 | return -1; | |
630530a6 TS |
691 | } |
692 | } | |
693 | return 0; | |
694 | } | |
695 | ||
b3976d3c | 696 | static int vmdk_L2update(VmdkExtent *extent, VmdkMetaData *m_data) |
630530a6 | 697 | { |
630530a6 | 698 | /* update L2 table */ |
b3976d3c FZ |
699 | if (bdrv_pwrite_sync( |
700 | extent->file, | |
701 | ((int64_t)m_data->l2_offset * 512) | |
702 | + (m_data->l2_index * sizeof(m_data->offset)), | |
703 | &(m_data->offset), | |
704 | sizeof(m_data->offset) | |
705 | ) < 0) { | |
630530a6 | 706 | return -1; |
b3976d3c | 707 | } |
630530a6 | 708 | /* update backup L2 table */ |
b3976d3c FZ |
709 | if (extent->l1_backup_table_offset != 0) { |
710 | m_data->l2_offset = extent->l1_backup_table[m_data->l1_index]; | |
711 | if (bdrv_pwrite_sync( | |
712 | extent->file, | |
713 | ((int64_t)m_data->l2_offset * 512) | |
714 | + (m_data->l2_index * sizeof(m_data->offset)), | |
715 | &(m_data->offset), sizeof(m_data->offset) | |
716 | ) < 0) { | |
5f4da8c0 | 717 | return -1; |
b3976d3c | 718 | } |
5f4da8c0 | 719 | } |
630530a6 | 720 | |
5f4da8c0 TS |
721 | return 0; |
722 | } | |
723 | ||
91b85bd3 | 724 | static int get_cluster_offset(BlockDriverState *bs, |
b3976d3c FZ |
725 | VmdkExtent *extent, |
726 | VmdkMetaData *m_data, | |
91b85bd3 FZ |
727 | uint64_t offset, |
728 | int allocate, | |
729 | uint64_t *cluster_offset) | |
ea2384d3 | 730 | { |
ea2384d3 FB |
731 | unsigned int l1_index, l2_offset, l2_index; |
732 | int min_index, i, j; | |
630530a6 | 733 | uint32_t min_count, *l2_table, tmp = 0; |
630530a6 | 734 | |
ae261c86 | 735 | if (m_data) { |
630530a6 | 736 | m_data->valid = 0; |
ae261c86 | 737 | } |
91b85bd3 | 738 | if (extent->flat) { |
7fa60fa3 | 739 | *cluster_offset = extent->flat_start_offset; |
91b85bd3 FZ |
740 | return 0; |
741 | } | |
630530a6 | 742 | |
6398de51 | 743 | offset -= (extent->end_sector - extent->sectors) * SECTOR_SIZE; |
b3976d3c FZ |
744 | l1_index = (offset >> 9) / extent->l1_entry_sectors; |
745 | if (l1_index >= extent->l1_size) { | |
91b85bd3 | 746 | return -1; |
b3976d3c FZ |
747 | } |
748 | l2_offset = extent->l1_table[l1_index]; | |
749 | if (!l2_offset) { | |
91b85bd3 | 750 | return -1; |
b3976d3c | 751 | } |
b4b3ab14 | 752 | for (i = 0; i < L2_CACHE_SIZE; i++) { |
b3976d3c | 753 | if (l2_offset == extent->l2_cache_offsets[i]) { |
ea2384d3 | 754 | /* increment the hit count */ |
b3976d3c | 755 | if (++extent->l2_cache_counts[i] == 0xffffffff) { |
b4b3ab14 | 756 | for (j = 0; j < L2_CACHE_SIZE; j++) { |
b3976d3c | 757 | extent->l2_cache_counts[j] >>= 1; |
ea2384d3 FB |
758 | } |
759 | } | |
b3976d3c | 760 | l2_table = extent->l2_cache + (i * extent->l2_size); |
ea2384d3 FB |
761 | goto found; |
762 | } | |
763 | } | |
764 | /* not found: load a new entry in the least used one */ | |
765 | min_index = 0; | |
766 | min_count = 0xffffffff; | |
b4b3ab14 | 767 | for (i = 0; i < L2_CACHE_SIZE; i++) { |
b3976d3c FZ |
768 | if (extent->l2_cache_counts[i] < min_count) { |
769 | min_count = extent->l2_cache_counts[i]; | |
ea2384d3 FB |
770 | min_index = i; |
771 | } | |
772 | } | |
b3976d3c FZ |
773 | l2_table = extent->l2_cache + (min_index * extent->l2_size); |
774 | if (bdrv_pread( | |
775 | extent->file, | |
776 | (int64_t)l2_offset * 512, | |
777 | l2_table, | |
778 | extent->l2_size * sizeof(uint32_t) | |
779 | ) != extent->l2_size * sizeof(uint32_t)) { | |
91b85bd3 | 780 | return -1; |
b3976d3c | 781 | } |
5f4da8c0 | 782 | |
b3976d3c FZ |
783 | extent->l2_cache_offsets[min_index] = l2_offset; |
784 | extent->l2_cache_counts[min_index] = 1; | |
ea2384d3 | 785 | found: |
b3976d3c | 786 | l2_index = ((offset >> 9) / extent->cluster_sectors) % extent->l2_size; |
91b85bd3 | 787 | *cluster_offset = le32_to_cpu(l2_table[l2_index]); |
630530a6 | 788 | |
91b85bd3 FZ |
789 | if (!*cluster_offset) { |
790 | if (!allocate) { | |
791 | return -1; | |
792 | } | |
9949f97e | 793 | |
ae261c86 | 794 | /* Avoid the L2 tables update for the images that have snapshots. */ |
91b85bd3 | 795 | *cluster_offset = bdrv_getlength(extent->file); |
2b2c8c5d FZ |
796 | if (!extent->compressed) { |
797 | bdrv_truncate( | |
798 | extent->file, | |
799 | *cluster_offset + (extent->cluster_sectors << 9) | |
800 | ); | |
801 | } | |
9949f97e | 802 | |
91b85bd3 FZ |
803 | *cluster_offset >>= 9; |
804 | tmp = cpu_to_le32(*cluster_offset); | |
9949f97e | 805 | l2_table[l2_index] = tmp; |
630530a6 | 806 | |
630530a6 TS |
807 | /* First of all we write grain itself, to avoid race condition |
808 | * that may to corrupt the image. | |
809 | * This problem may occur because of insufficient space on host disk | |
810 | * or inappropriate VM shutdown. | |
811 | */ | |
b3976d3c | 812 | if (get_whole_cluster( |
ae261c86 | 813 | bs, extent, *cluster_offset, offset, allocate) == -1) { |
91b85bd3 | 814 | return -1; |
ae261c86 | 815 | } |
630530a6 TS |
816 | |
817 | if (m_data) { | |
818 | m_data->offset = tmp; | |
819 | m_data->l1_index = l1_index; | |
820 | m_data->l2_index = l2_index; | |
821 | m_data->l2_offset = l2_offset; | |
822 | m_data->valid = 1; | |
823 | } | |
ff1afc72 | 824 | } |
91b85bd3 FZ |
825 | *cluster_offset <<= 9; |
826 | return 0; | |
ea2384d3 FB |
827 | } |
828 | ||
b3976d3c FZ |
829 | static VmdkExtent *find_extent(BDRVVmdkState *s, |
830 | int64_t sector_num, VmdkExtent *start_hint) | |
831 | { | |
832 | VmdkExtent *extent = start_hint; | |
833 | ||
834 | if (!extent) { | |
835 | extent = &s->extents[0]; | |
836 | } | |
837 | while (extent < &s->extents[s->num_extents]) { | |
838 | if (sector_num < extent->end_sector) { | |
839 | return extent; | |
840 | } | |
841 | extent++; | |
842 | } | |
843 | return NULL; | |
844 | } | |
845 | ||
5fafdf24 | 846 | static int vmdk_is_allocated(BlockDriverState *bs, int64_t sector_num, |
ea2384d3 FB |
847 | int nb_sectors, int *pnum) |
848 | { | |
849 | BDRVVmdkState *s = bs->opaque; | |
b3976d3c FZ |
850 | int64_t index_in_cluster, n, ret; |
851 | uint64_t offset; | |
852 | VmdkExtent *extent; | |
853 | ||
854 | extent = find_extent(s, sector_num, NULL); | |
855 | if (!extent) { | |
856 | return 0; | |
857 | } | |
91b85bd3 FZ |
858 | ret = get_cluster_offset(bs, extent, NULL, |
859 | sector_num * 512, 0, &offset); | |
860 | /* get_cluster_offset returning 0 means success */ | |
861 | ret = !ret; | |
862 | ||
863 | index_in_cluster = sector_num % extent->cluster_sectors; | |
864 | n = extent->cluster_sectors - index_in_cluster; | |
ae261c86 | 865 | if (n > nb_sectors) { |
ea2384d3 | 866 | n = nb_sectors; |
ae261c86 | 867 | } |
ea2384d3 | 868 | *pnum = n; |
b3976d3c | 869 | return ret; |
ea2384d3 FB |
870 | } |
871 | ||
dd3f6ee2 FZ |
872 | static int vmdk_write_extent(VmdkExtent *extent, int64_t cluster_offset, |
873 | int64_t offset_in_cluster, const uint8_t *buf, | |
874 | int nb_sectors, int64_t sector_num) | |
875 | { | |
876 | int ret; | |
2b2c8c5d FZ |
877 | VmdkGrainMarker *data = NULL; |
878 | uLongf buf_len; | |
dd3f6ee2 FZ |
879 | const uint8_t *write_buf = buf; |
880 | int write_len = nb_sectors * 512; | |
881 | ||
2b2c8c5d FZ |
882 | if (extent->compressed) { |
883 | if (!extent->has_marker) { | |
884 | ret = -EINVAL; | |
885 | goto out; | |
886 | } | |
887 | buf_len = (extent->cluster_sectors << 9) * 2; | |
888 | data = g_malloc(buf_len + sizeof(VmdkGrainMarker)); | |
889 | if (compress(data->data, &buf_len, buf, nb_sectors << 9) != Z_OK || | |
890 | buf_len == 0) { | |
891 | ret = -EINVAL; | |
892 | goto out; | |
893 | } | |
894 | data->lba = sector_num; | |
895 | data->size = buf_len; | |
896 | write_buf = (uint8_t *)data; | |
897 | write_len = buf_len + sizeof(VmdkGrainMarker); | |
898 | } | |
dd3f6ee2 FZ |
899 | ret = bdrv_pwrite(extent->file, |
900 | cluster_offset + offset_in_cluster, | |
901 | write_buf, | |
902 | write_len); | |
903 | if (ret != write_len) { | |
904 | ret = ret < 0 ? ret : -EIO; | |
905 | goto out; | |
906 | } | |
907 | ret = 0; | |
908 | out: | |
2b2c8c5d | 909 | g_free(data); |
dd3f6ee2 FZ |
910 | return ret; |
911 | } | |
912 | ||
913 | static int vmdk_read_extent(VmdkExtent *extent, int64_t cluster_offset, | |
914 | int64_t offset_in_cluster, uint8_t *buf, | |
915 | int nb_sectors) | |
916 | { | |
917 | int ret; | |
2b2c8c5d FZ |
918 | int cluster_bytes, buf_bytes; |
919 | uint8_t *cluster_buf, *compressed_data; | |
920 | uint8_t *uncomp_buf; | |
921 | uint32_t data_len; | |
922 | VmdkGrainMarker *marker; | |
923 | uLongf buf_len; | |
924 | ||
dd3f6ee2 | 925 | |
2b2c8c5d FZ |
926 | if (!extent->compressed) { |
927 | ret = bdrv_pread(extent->file, | |
928 | cluster_offset + offset_in_cluster, | |
929 | buf, nb_sectors * 512); | |
930 | if (ret == nb_sectors * 512) { | |
931 | return 0; | |
932 | } else { | |
933 | return -EIO; | |
934 | } | |
935 | } | |
936 | cluster_bytes = extent->cluster_sectors * 512; | |
937 | /* Read two clusters in case GrainMarker + compressed data > one cluster */ | |
938 | buf_bytes = cluster_bytes * 2; | |
939 | cluster_buf = g_malloc(buf_bytes); | |
940 | uncomp_buf = g_malloc(cluster_bytes); | |
dd3f6ee2 | 941 | ret = bdrv_pread(extent->file, |
2b2c8c5d FZ |
942 | cluster_offset, |
943 | cluster_buf, buf_bytes); | |
944 | if (ret < 0) { | |
945 | goto out; | |
946 | } | |
947 | compressed_data = cluster_buf; | |
948 | buf_len = cluster_bytes; | |
949 | data_len = cluster_bytes; | |
950 | if (extent->has_marker) { | |
951 | marker = (VmdkGrainMarker *)cluster_buf; | |
952 | compressed_data = marker->data; | |
953 | data_len = le32_to_cpu(marker->size); | |
954 | } | |
955 | if (!data_len || data_len > buf_bytes) { | |
956 | ret = -EINVAL; | |
957 | goto out; | |
958 | } | |
959 | ret = uncompress(uncomp_buf, &buf_len, compressed_data, data_len); | |
960 | if (ret != Z_OK) { | |
961 | ret = -EINVAL; | |
962 | goto out; | |
963 | ||
964 | } | |
965 | if (offset_in_cluster < 0 || | |
966 | offset_in_cluster + nb_sectors * 512 > buf_len) { | |
967 | ret = -EINVAL; | |
968 | goto out; | |
dd3f6ee2 | 969 | } |
2b2c8c5d FZ |
970 | memcpy(buf, uncomp_buf + offset_in_cluster, nb_sectors * 512); |
971 | ret = 0; | |
972 | ||
973 | out: | |
974 | g_free(uncomp_buf); | |
975 | g_free(cluster_buf); | |
976 | return ret; | |
dd3f6ee2 FZ |
977 | } |
978 | ||
5fafdf24 | 979 | static int vmdk_read(BlockDriverState *bs, int64_t sector_num, |
ea2384d3 FB |
980 | uint8_t *buf, int nb_sectors) |
981 | { | |
982 | BDRVVmdkState *s = bs->opaque; | |
b3976d3c FZ |
983 | int ret; |
984 | uint64_t n, index_in_cluster; | |
985 | VmdkExtent *extent = NULL; | |
ea2384d3 | 986 | uint64_t cluster_offset; |
5f4da8c0 | 987 | |
ea2384d3 | 988 | while (nb_sectors > 0) { |
b3976d3c FZ |
989 | extent = find_extent(s, sector_num, extent); |
990 | if (!extent) { | |
991 | return -EIO; | |
992 | } | |
91b85bd3 FZ |
993 | ret = get_cluster_offset( |
994 | bs, extent, NULL, | |
995 | sector_num << 9, 0, &cluster_offset); | |
b3976d3c FZ |
996 | index_in_cluster = sector_num % extent->cluster_sectors; |
997 | n = extent->cluster_sectors - index_in_cluster; | |
ae261c86 | 998 | if (n > nb_sectors) { |
ea2384d3 | 999 | n = nb_sectors; |
ae261c86 | 1000 | } |
91b85bd3 FZ |
1001 | if (ret) { |
1002 | /* if not allocated, try to read from parent image, if exist */ | |
b171271a | 1003 | if (bs->backing_hd) { |
ae261c86 | 1004 | if (!vmdk_is_cid_valid(bs)) { |
7fa60fa3 | 1005 | return -EINVAL; |
ae261c86 | 1006 | } |
b171271a | 1007 | ret = bdrv_read(bs->backing_hd, sector_num, buf, n); |
ae261c86 | 1008 | if (ret < 0) { |
7fa60fa3 | 1009 | return ret; |
ae261c86 | 1010 | } |
5f4da8c0 TS |
1011 | } else { |
1012 | memset(buf, 0, 512 * n); | |
1013 | } | |
ea2384d3 | 1014 | } else { |
dd3f6ee2 FZ |
1015 | ret = vmdk_read_extent(extent, |
1016 | cluster_offset, index_in_cluster * 512, | |
1017 | buf, n); | |
1018 | if (ret) { | |
7fa60fa3 FZ |
1019 | return ret; |
1020 | } | |
ea2384d3 FB |
1021 | } |
1022 | nb_sectors -= n; | |
1023 | sector_num += n; | |
1024 | buf += n * 512; | |
1025 | } | |
1026 | return 0; | |
1027 | } | |
1028 | ||
5fafdf24 | 1029 | static int vmdk_write(BlockDriverState *bs, int64_t sector_num, |
ea2384d3 FB |
1030 | const uint8_t *buf, int nb_sectors) |
1031 | { | |
ff1afc72 | 1032 | BDRVVmdkState *s = bs->opaque; |
b3976d3c | 1033 | VmdkExtent *extent = NULL; |
91b85bd3 | 1034 | int n, ret; |
b3976d3c | 1035 | int64_t index_in_cluster; |
ff1afc72 | 1036 | uint64_t cluster_offset; |
b3976d3c | 1037 | VmdkMetaData m_data; |
ff1afc72 | 1038 | |
630530a6 TS |
1039 | if (sector_num > bs->total_sectors) { |
1040 | fprintf(stderr, | |
92868412 JM |
1041 | "(VMDK) Wrong offset: sector_num=0x%" PRIx64 |
1042 | " total_sectors=0x%" PRIx64 "\n", | |
630530a6 | 1043 | sector_num, bs->total_sectors); |
7fa60fa3 | 1044 | return -EIO; |
630530a6 TS |
1045 | } |
1046 | ||
ff1afc72 | 1047 | while (nb_sectors > 0) { |
b3976d3c FZ |
1048 | extent = find_extent(s, sector_num, extent); |
1049 | if (!extent) { | |
1050 | return -EIO; | |
1051 | } | |
91b85bd3 | 1052 | ret = get_cluster_offset( |
b3976d3c FZ |
1053 | bs, |
1054 | extent, | |
1055 | &m_data, | |
2b2c8c5d | 1056 | sector_num << 9, !extent->compressed, |
91b85bd3 | 1057 | &cluster_offset); |
2b2c8c5d FZ |
1058 | if (extent->compressed) { |
1059 | if (ret == 0) { | |
1060 | /* Refuse write to allocated cluster for streamOptimized */ | |
1061 | fprintf(stderr, | |
1062 | "VMDK: can't write to allocated cluster" | |
1063 | " for streamOptimized\n"); | |
1064 | return -EIO; | |
1065 | } else { | |
1066 | /* allocate */ | |
1067 | ret = get_cluster_offset( | |
1068 | bs, | |
1069 | extent, | |
1070 | &m_data, | |
1071 | sector_num << 9, 1, | |
1072 | &cluster_offset); | |
1073 | } | |
1074 | } | |
91b85bd3 FZ |
1075 | if (ret) { |
1076 | return -EINVAL; | |
b3976d3c FZ |
1077 | } |
1078 | index_in_cluster = sector_num % extent->cluster_sectors; | |
1079 | n = extent->cluster_sectors - index_in_cluster; | |
1080 | if (n > nb_sectors) { | |
1081 | n = nb_sectors; | |
1082 | } | |
630530a6 | 1083 | |
dd3f6ee2 FZ |
1084 | ret = vmdk_write_extent(extent, |
1085 | cluster_offset, index_in_cluster * 512, | |
1086 | buf, n, sector_num); | |
1087 | if (ret) { | |
7fa60fa3 | 1088 | return ret; |
b3976d3c | 1089 | } |
630530a6 TS |
1090 | if (m_data.valid) { |
1091 | /* update L2 tables */ | |
b3976d3c | 1092 | if (vmdk_L2update(extent, &m_data) == -1) { |
7fa60fa3 | 1093 | return -EIO; |
b3976d3c | 1094 | } |
630530a6 | 1095 | } |
ff1afc72 FB |
1096 | nb_sectors -= n; |
1097 | sector_num += n; | |
1098 | buf += n * 512; | |
5f4da8c0 | 1099 | |
ae261c86 FZ |
1100 | /* update CID on the first write every time the virtual disk is |
1101 | * opened */ | |
69b4d86d | 1102 | if (!s->cid_updated) { |
5f4da8c0 | 1103 | vmdk_write_cid(bs, time(NULL)); |
69b4d86d | 1104 | s->cid_updated = true; |
5f4da8c0 | 1105 | } |
ff1afc72 FB |
1106 | } |
1107 | return 0; | |
ea2384d3 FB |
1108 | } |
1109 | ||
f66fd6c3 | 1110 | |
6c031aac FZ |
1111 | static int vmdk_create_extent(const char *filename, int64_t filesize, |
1112 | bool flat, bool compress) | |
8979b227 | 1113 | { |
f66fd6c3 FZ |
1114 | int ret, i; |
1115 | int fd = 0; | |
8979b227 FB |
1116 | VMDK4Header header; |
1117 | uint32_t tmp, magic, grains, gd_size, gt_size, gt_count; | |
0e7e1989 | 1118 | |
f66fd6c3 FZ |
1119 | fd = open( |
1120 | filename, | |
1121 | O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE, | |
1122 | 0644); | |
1123 | if (fd < 0) { | |
1124 | return -errno; | |
0e7e1989 | 1125 | } |
f66fd6c3 FZ |
1126 | if (flat) { |
1127 | ret = ftruncate(fd, filesize); | |
1128 | if (ret < 0) { | |
1129 | ret = -errno; | |
1130 | } | |
1131 | goto exit; | |
5f4da8c0 | 1132 | } |
8979b227 FB |
1133 | magic = cpu_to_be32(VMDK4_MAGIC); |
1134 | memset(&header, 0, sizeof(header)); | |
16372ff0 | 1135 | header.version = 1; |
6c031aac FZ |
1136 | header.flags = |
1137 | 3 | (compress ? VMDK4_FLAG_COMPRESS | VMDK4_FLAG_MARKER : 0); | |
1138 | header.compressAlgorithm = compress ? VMDK4_COMPRESSION_DEFLATE : 0; | |
f66fd6c3 | 1139 | header.capacity = filesize / 512; |
16372ff0 AG |
1140 | header.granularity = 128; |
1141 | header.num_gtes_per_gte = 512; | |
8979b227 | 1142 | |
f66fd6c3 | 1143 | grains = (filesize / 512 + header.granularity - 1) / header.granularity; |
8979b227 | 1144 | gt_size = ((header.num_gtes_per_gte * sizeof(uint32_t)) + 511) >> 9; |
f66fd6c3 FZ |
1145 | gt_count = |
1146 | (grains + header.num_gtes_per_gte - 1) / header.num_gtes_per_gte; | |
8979b227 FB |
1147 | gd_size = (gt_count * sizeof(uint32_t) + 511) >> 9; |
1148 | ||
1149 | header.desc_offset = 1; | |
1150 | header.desc_size = 20; | |
1151 | header.rgd_offset = header.desc_offset + header.desc_size; | |
1152 | header.gd_offset = header.rgd_offset + gd_size + (gt_size * gt_count); | |
1153 | header.grain_offset = | |
1154 | ((header.gd_offset + gd_size + (gt_size * gt_count) + | |
1155 | header.granularity - 1) / header.granularity) * | |
1156 | header.granularity; | |
16372ff0 AG |
1157 | /* swap endianness for all header fields */ |
1158 | header.version = cpu_to_le32(header.version); | |
1159 | header.flags = cpu_to_le32(header.flags); | |
1160 | header.capacity = cpu_to_le64(header.capacity); | |
1161 | header.granularity = cpu_to_le64(header.granularity); | |
1162 | header.num_gtes_per_gte = cpu_to_le32(header.num_gtes_per_gte); | |
8979b227 FB |
1163 | header.desc_offset = cpu_to_le64(header.desc_offset); |
1164 | header.desc_size = cpu_to_le64(header.desc_size); | |
1165 | header.rgd_offset = cpu_to_le64(header.rgd_offset); | |
1166 | header.gd_offset = cpu_to_le64(header.gd_offset); | |
1167 | header.grain_offset = cpu_to_le64(header.grain_offset); | |
6c031aac | 1168 | header.compressAlgorithm = cpu_to_le16(header.compressAlgorithm); |
8979b227 FB |
1169 | |
1170 | header.check_bytes[0] = 0xa; | |
1171 | header.check_bytes[1] = 0x20; | |
1172 | header.check_bytes[2] = 0xd; | |
1173 | header.check_bytes[3] = 0xa; | |
3b46e624 TS |
1174 | |
1175 | /* write all the data */ | |
1640366c KS |
1176 | ret = qemu_write_full(fd, &magic, sizeof(magic)); |
1177 | if (ret != sizeof(magic)) { | |
b781cce5 | 1178 | ret = -errno; |
1640366c KS |
1179 | goto exit; |
1180 | } | |
1181 | ret = qemu_write_full(fd, &header, sizeof(header)); | |
1182 | if (ret != sizeof(header)) { | |
b781cce5 | 1183 | ret = -errno; |
1640366c KS |
1184 | goto exit; |
1185 | } | |
8979b227 | 1186 | |
16372ff0 | 1187 | ret = ftruncate(fd, le64_to_cpu(header.grain_offset) << 9); |
1640366c | 1188 | if (ret < 0) { |
b781cce5 | 1189 | ret = -errno; |
1640366c KS |
1190 | goto exit; |
1191 | } | |
8979b227 FB |
1192 | |
1193 | /* write grain directory */ | |
1194 | lseek(fd, le64_to_cpu(header.rgd_offset) << 9, SEEK_SET); | |
16372ff0 | 1195 | for (i = 0, tmp = le64_to_cpu(header.rgd_offset) + gd_size; |
1640366c KS |
1196 | i < gt_count; i++, tmp += gt_size) { |
1197 | ret = qemu_write_full(fd, &tmp, sizeof(tmp)); | |
1198 | if (ret != sizeof(tmp)) { | |
b781cce5 | 1199 | ret = -errno; |
1640366c KS |
1200 | goto exit; |
1201 | } | |
1202 | } | |
3b46e624 | 1203 | |
8979b227 FB |
1204 | /* write backup grain directory */ |
1205 | lseek(fd, le64_to_cpu(header.gd_offset) << 9, SEEK_SET); | |
16372ff0 | 1206 | for (i = 0, tmp = le64_to_cpu(header.gd_offset) + gd_size; |
1640366c KS |
1207 | i < gt_count; i++, tmp += gt_size) { |
1208 | ret = qemu_write_full(fd, &tmp, sizeof(tmp)); | |
1209 | if (ret != sizeof(tmp)) { | |
b781cce5 | 1210 | ret = -errno; |
1640366c KS |
1211 | goto exit; |
1212 | } | |
1213 | } | |
8979b227 | 1214 | |
f66fd6c3 FZ |
1215 | ret = 0; |
1216 | exit: | |
1217 | close(fd); | |
1218 | return ret; | |
1219 | } | |
1220 | ||
1221 | static int filename_decompose(const char *filename, char *path, char *prefix, | |
1222 | char *postfix, size_t buf_len) | |
1223 | { | |
1224 | const char *p, *q; | |
1225 | ||
1226 | if (filename == NULL || !strlen(filename)) { | |
1227 | fprintf(stderr, "Vmdk: no filename provided.\n"); | |
1228 | return -1; | |
1229 | } | |
1230 | p = strrchr(filename, '/'); | |
1231 | if (p == NULL) { | |
1232 | p = strrchr(filename, '\\'); | |
1233 | } | |
1234 | if (p == NULL) { | |
1235 | p = strrchr(filename, ':'); | |
1236 | } | |
1237 | if (p != NULL) { | |
1238 | p++; | |
1239 | if (p - filename >= buf_len) { | |
1240 | return -1; | |
1241 | } | |
1242 | pstrcpy(path, p - filename + 1, filename); | |
1243 | } else { | |
1244 | p = filename; | |
1245 | path[0] = '\0'; | |
1246 | } | |
1247 | q = strrchr(p, '.'); | |
1248 | if (q == NULL) { | |
1249 | pstrcpy(prefix, buf_len, p); | |
1250 | postfix[0] = '\0'; | |
1251 | } else { | |
1252 | if (q - p >= buf_len) { | |
1253 | return -1; | |
1254 | } | |
1255 | pstrcpy(prefix, q - p + 1, p); | |
1256 | pstrcpy(postfix, buf_len, q); | |
1257 | } | |
1258 | return 0; | |
1259 | } | |
1260 | ||
1261 | static int relative_path(char *dest, int dest_size, | |
1262 | const char *base, const char *target) | |
1263 | { | |
1264 | int i = 0; | |
1265 | int n = 0; | |
1266 | const char *p, *q; | |
1267 | #ifdef _WIN32 | |
1268 | const char *sep = "\\"; | |
1269 | #else | |
1270 | const char *sep = "/"; | |
1271 | #endif | |
1272 | ||
1273 | if (!(dest && base && target)) { | |
1274 | return -1; | |
1275 | } | |
1276 | if (path_is_absolute(target)) { | |
1277 | dest[dest_size - 1] = '\0'; | |
1278 | strncpy(dest, target, dest_size - 1); | |
1279 | return 0; | |
1280 | } | |
1281 | while (base[i] == target[i]) { | |
1282 | i++; | |
1283 | } | |
1284 | p = &base[i]; | |
1285 | q = &target[i]; | |
1286 | while (*p) { | |
1287 | if (*p == *sep) { | |
1288 | n++; | |
1289 | } | |
1290 | p++; | |
1291 | } | |
1292 | dest[0] = '\0'; | |
1293 | for (; n; n--) { | |
1294 | pstrcat(dest, dest_size, ".."); | |
1295 | pstrcat(dest, dest_size, sep); | |
1296 | } | |
1297 | pstrcat(dest, dest_size, q); | |
1298 | return 0; | |
1299 | } | |
1300 | ||
1301 | static int vmdk_create(const char *filename, QEMUOptionParameter *options) | |
1302 | { | |
1303 | int fd, idx = 0; | |
1304 | char desc[BUF_SIZE]; | |
1305 | int64_t total_size = 0, filesize; | |
1306 | const char *backing_file = NULL; | |
1307 | const char *fmt = NULL; | |
1308 | int flags = 0; | |
1309 | int ret = 0; | |
6c031aac | 1310 | bool flat, split, compress; |
f66fd6c3 FZ |
1311 | char ext_desc_lines[BUF_SIZE] = ""; |
1312 | char path[PATH_MAX], prefix[PATH_MAX], postfix[PATH_MAX]; | |
1313 | const int64_t split_size = 0x80000000; /* VMDK has constant split size */ | |
1314 | const char *desc_extent_line; | |
1315 | char parent_desc_line[BUF_SIZE] = ""; | |
1316 | uint32_t parent_cid = 0xffffffff; | |
1317 | const char desc_template[] = | |
1318 | "# Disk DescriptorFile\n" | |
1319 | "version=1\n" | |
1320 | "CID=%x\n" | |
1321 | "parentCID=%x\n" | |
1322 | "createType=\"%s\"\n" | |
1323 | "%s" | |
1324 | "\n" | |
1325 | "# Extent description\n" | |
1326 | "%s" | |
1327 | "\n" | |
1328 | "# The Disk Data Base\n" | |
1329 | "#DDB\n" | |
1330 | "\n" | |
1331 | "ddb.virtualHWVersion = \"%d\"\n" | |
1332 | "ddb.geometry.cylinders = \"%" PRId64 "\"\n" | |
1333 | "ddb.geometry.heads = \"16\"\n" | |
1334 | "ddb.geometry.sectors = \"63\"\n" | |
1335 | "ddb.adapterType = \"ide\"\n"; | |
1336 | ||
1337 | if (filename_decompose(filename, path, prefix, postfix, PATH_MAX)) { | |
1338 | return -EINVAL; | |
1339 | } | |
1340 | /* Read out options */ | |
1341 | while (options && options->name) { | |
1342 | if (!strcmp(options->name, BLOCK_OPT_SIZE)) { | |
1343 | total_size = options->value.n; | |
1344 | } else if (!strcmp(options->name, BLOCK_OPT_BACKING_FILE)) { | |
1345 | backing_file = options->value.s; | |
1346 | } else if (!strcmp(options->name, BLOCK_OPT_COMPAT6)) { | |
1347 | flags |= options->value.n ? BLOCK_FLAG_COMPAT6 : 0; | |
1348 | } else if (!strcmp(options->name, BLOCK_OPT_SUBFMT)) { | |
1349 | fmt = options->value.s; | |
1350 | } | |
1351 | options++; | |
1352 | } | |
1353 | if (!fmt) { | |
1354 | /* Default format to monolithicSparse */ | |
1355 | fmt = "monolithicSparse"; | |
1356 | } else if (strcmp(fmt, "monolithicFlat") && | |
1357 | strcmp(fmt, "monolithicSparse") && | |
1358 | strcmp(fmt, "twoGbMaxExtentSparse") && | |
6c031aac FZ |
1359 | strcmp(fmt, "twoGbMaxExtentFlat") && |
1360 | strcmp(fmt, "streamOptimized")) { | |
f66fd6c3 FZ |
1361 | fprintf(stderr, "VMDK: Unknown subformat: %s\n", fmt); |
1362 | return -EINVAL; | |
1363 | } | |
1364 | split = !(strcmp(fmt, "twoGbMaxExtentFlat") && | |
1365 | strcmp(fmt, "twoGbMaxExtentSparse")); | |
1366 | flat = !(strcmp(fmt, "monolithicFlat") && | |
1367 | strcmp(fmt, "twoGbMaxExtentFlat")); | |
6c031aac | 1368 | compress = !strcmp(fmt, "streamOptimized"); |
f66fd6c3 FZ |
1369 | if (flat) { |
1370 | desc_extent_line = "RW %lld FLAT \"%s\" 0\n"; | |
1371 | } else { | |
1372 | desc_extent_line = "RW %lld SPARSE \"%s\"\n"; | |
1373 | } | |
1374 | if (flat && backing_file) { | |
1375 | /* not supporting backing file for flat image */ | |
1376 | return -ENOTSUP; | |
1377 | } | |
1378 | if (backing_file) { | |
1379 | char parent_filename[PATH_MAX]; | |
1380 | BlockDriverState *bs = bdrv_new(""); | |
1381 | ret = bdrv_open(bs, backing_file, 0, NULL); | |
1382 | if (ret != 0) { | |
1383 | bdrv_delete(bs); | |
1384 | return ret; | |
1385 | } | |
1386 | if (strcmp(bs->drv->format_name, "vmdk")) { | |
1387 | bdrv_delete(bs); | |
1388 | return -EINVAL; | |
1389 | } | |
1390 | filesize = bdrv_getlength(bs); | |
1391 | parent_cid = vmdk_read_cid(bs, 0); | |
1392 | bdrv_delete(bs); | |
1393 | relative_path(parent_filename, sizeof(parent_filename), | |
1394 | filename, backing_file); | |
1395 | snprintf(parent_desc_line, sizeof(parent_desc_line), | |
1396 | "parentFileNameHint=\"%s\"", parent_filename); | |
1397 | } | |
1398 | ||
1399 | /* Create extents */ | |
1400 | filesize = total_size; | |
1401 | while (filesize > 0) { | |
1402 | char desc_line[BUF_SIZE]; | |
1403 | char ext_filename[PATH_MAX]; | |
1404 | char desc_filename[PATH_MAX]; | |
1405 | int64_t size = filesize; | |
1406 | ||
1407 | if (split && size > split_size) { | |
1408 | size = split_size; | |
1409 | } | |
1410 | if (split) { | |
1411 | snprintf(desc_filename, sizeof(desc_filename), "%s-%c%03d%s", | |
1412 | prefix, flat ? 'f' : 's', ++idx, postfix); | |
1413 | } else if (flat) { | |
1414 | snprintf(desc_filename, sizeof(desc_filename), "%s-flat%s", | |
1415 | prefix, postfix); | |
1416 | } else { | |
1417 | snprintf(desc_filename, sizeof(desc_filename), "%s%s", | |
1418 | prefix, postfix); | |
1419 | } | |
1420 | snprintf(ext_filename, sizeof(ext_filename), "%s%s", | |
1421 | path, desc_filename); | |
1422 | ||
6c031aac | 1423 | if (vmdk_create_extent(ext_filename, size, flat, compress)) { |
f66fd6c3 FZ |
1424 | return -EINVAL; |
1425 | } | |
1426 | filesize -= size; | |
1427 | ||
1428 | /* Format description line */ | |
1429 | snprintf(desc_line, sizeof(desc_line), | |
1430 | desc_extent_line, size / 512, desc_filename); | |
1431 | pstrcat(ext_desc_lines, sizeof(ext_desc_lines), desc_line); | |
1432 | } | |
1433 | /* generate descriptor file */ | |
1434 | snprintf(desc, sizeof(desc), desc_template, | |
1435 | (unsigned int)time(NULL), | |
1436 | parent_cid, | |
1437 | fmt, | |
1438 | parent_desc_line, | |
1439 | ext_desc_lines, | |
1440 | (flags & BLOCK_FLAG_COMPAT6 ? 6 : 4), | |
1441 | total_size / (int64_t)(63 * 16 * 512)); | |
1442 | if (split || flat) { | |
1443 | fd = open( | |
1444 | filename, | |
1445 | O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE, | |
1446 | 0644); | |
1447 | } else { | |
1448 | fd = open( | |
1449 | filename, | |
1450 | O_WRONLY | O_BINARY | O_LARGEFILE, | |
1451 | 0644); | |
1452 | } | |
1453 | if (fd < 0) { | |
1454 | return -errno; | |
1455 | } | |
1456 | /* the descriptor offset = 0x200 */ | |
1457 | if (!split && !flat && 0x200 != lseek(fd, 0x200, SEEK_SET)) { | |
1458 | ret = -errno; | |
1459 | goto exit; | |
1460 | } | |
1640366c KS |
1461 | ret = qemu_write_full(fd, desc, strlen(desc)); |
1462 | if (ret != strlen(desc)) { | |
b781cce5 | 1463 | ret = -errno; |
1640366c KS |
1464 | goto exit; |
1465 | } | |
1640366c KS |
1466 | ret = 0; |
1467 | exit: | |
8979b227 | 1468 | close(fd); |
1640366c | 1469 | return ret; |
8979b227 FB |
1470 | } |
1471 | ||
e2731add | 1472 | static void vmdk_close(BlockDriverState *bs) |
ea2384d3 | 1473 | { |
b3976d3c | 1474 | vmdk_free_extents(bs); |
ea2384d3 FB |
1475 | } |
1476 | ||
205ef796 | 1477 | static int vmdk_flush(BlockDriverState *bs) |
7a6cba61 | 1478 | { |
333c574d FZ |
1479 | int i, ret, err; |
1480 | BDRVVmdkState *s = bs->opaque; | |
1481 | ||
1482 | ret = bdrv_flush(bs->file); | |
1483 | for (i = 0; i < s->num_extents; i++) { | |
1484 | err = bdrv_flush(s->extents[i].file); | |
1485 | if (err < 0) { | |
1486 | ret = err; | |
1487 | } | |
1488 | } | |
1489 | return ret; | |
7a6cba61 PB |
1490 | } |
1491 | ||
4a1d5e1f FZ |
1492 | static int64_t vmdk_get_allocated_file_size(BlockDriverState *bs) |
1493 | { | |
1494 | int i; | |
1495 | int64_t ret = 0; | |
1496 | int64_t r; | |
1497 | BDRVVmdkState *s = bs->opaque; | |
1498 | ||
1499 | ret = bdrv_get_allocated_file_size(bs->file); | |
1500 | if (ret < 0) { | |
1501 | return ret; | |
1502 | } | |
1503 | for (i = 0; i < s->num_extents; i++) { | |
1504 | if (s->extents[i].file == bs->file) { | |
1505 | continue; | |
1506 | } | |
1507 | r = bdrv_get_allocated_file_size(s->extents[i].file); | |
1508 | if (r < 0) { | |
1509 | return r; | |
1510 | } | |
1511 | ret += r; | |
1512 | } | |
1513 | return ret; | |
1514 | } | |
0e7e1989 KW |
1515 | |
1516 | static QEMUOptionParameter vmdk_create_options[] = { | |
db08adf5 KW |
1517 | { |
1518 | .name = BLOCK_OPT_SIZE, | |
1519 | .type = OPT_SIZE, | |
1520 | .help = "Virtual disk size" | |
1521 | }, | |
1522 | { | |
1523 | .name = BLOCK_OPT_BACKING_FILE, | |
1524 | .type = OPT_STRING, | |
1525 | .help = "File name of a base image" | |
1526 | }, | |
1527 | { | |
1528 | .name = BLOCK_OPT_COMPAT6, | |
1529 | .type = OPT_FLAG, | |
1530 | .help = "VMDK version 6 image" | |
1531 | }, | |
f66fd6c3 FZ |
1532 | { |
1533 | .name = BLOCK_OPT_SUBFMT, | |
1534 | .type = OPT_STRING, | |
1535 | .help = | |
1536 | "VMDK flat extent format, can be one of " | |
6c031aac | 1537 | "{monolithicSparse (default) | monolithicFlat | twoGbMaxExtentSparse | twoGbMaxExtentFlat | streamOptimized} " |
f66fd6c3 | 1538 | }, |
0e7e1989 KW |
1539 | { NULL } |
1540 | }; | |
1541 | ||
5efa9d5a | 1542 | static BlockDriver bdrv_vmdk = { |
ae261c86 FZ |
1543 | .format_name = "vmdk", |
1544 | .instance_size = sizeof(BDRVVmdkState), | |
1545 | .bdrv_probe = vmdk_probe, | |
6511ef77 | 1546 | .bdrv_open = vmdk_open, |
ae261c86 FZ |
1547 | .bdrv_read = vmdk_read, |
1548 | .bdrv_write = vmdk_write, | |
1549 | .bdrv_close = vmdk_close, | |
1550 | .bdrv_create = vmdk_create, | |
1551 | .bdrv_flush = vmdk_flush, | |
1552 | .bdrv_is_allocated = vmdk_is_allocated, | |
4a1d5e1f | 1553 | .bdrv_get_allocated_file_size = vmdk_get_allocated_file_size, |
0e7e1989 KW |
1554 | |
1555 | .create_options = vmdk_create_options, | |
ea2384d3 | 1556 | }; |
5efa9d5a AL |
1557 | |
1558 | static void bdrv_vmdk_init(void) | |
1559 | { | |
1560 | bdrv_register(&bdrv_vmdk); | |
1561 | } | |
1562 | ||
1563 | block_init(bdrv_vmdk_init); |