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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 { | |
848c66e8 | 93 | CoMutex lock; |
e1da9b24 | 94 | int desc_offset; |
69b4d86d | 95 | bool cid_updated; |
5f4da8c0 | 96 | uint32_t parent_cid; |
b3976d3c FZ |
97 | int num_extents; |
98 | /* Extent array with num_extents entries, ascend ordered by address */ | |
99 | VmdkExtent *extents; | |
ea2384d3 FB |
100 | } BDRVVmdkState; |
101 | ||
630530a6 TS |
102 | typedef struct VmdkMetaData { |
103 | uint32_t offset; | |
104 | unsigned int l1_index; | |
105 | unsigned int l2_index; | |
106 | unsigned int l2_offset; | |
107 | int valid; | |
108 | } VmdkMetaData; | |
109 | ||
432bb170 FZ |
110 | typedef struct VmdkGrainMarker { |
111 | uint64_t lba; | |
112 | uint32_t size; | |
113 | uint8_t data[0]; | |
114 | } VmdkGrainMarker; | |
115 | ||
ea2384d3 FB |
116 | static int vmdk_probe(const uint8_t *buf, int buf_size, const char *filename) |
117 | { | |
118 | uint32_t magic; | |
119 | ||
ae261c86 | 120 | if (buf_size < 4) { |
ea2384d3 | 121 | return 0; |
ae261c86 | 122 | } |
ea2384d3 FB |
123 | magic = be32_to_cpu(*(uint32_t *)buf); |
124 | if (magic == VMDK3_MAGIC || | |
01fc99d6 | 125 | magic == VMDK4_MAGIC) { |
ea2384d3 | 126 | return 100; |
01fc99d6 FZ |
127 | } else { |
128 | const char *p = (const char *)buf; | |
129 | const char *end = p + buf_size; | |
130 | while (p < end) { | |
131 | if (*p == '#') { | |
132 | /* skip comment line */ | |
133 | while (p < end && *p != '\n') { | |
134 | p++; | |
135 | } | |
136 | p++; | |
137 | continue; | |
138 | } | |
139 | if (*p == ' ') { | |
140 | while (p < end && *p == ' ') { | |
141 | p++; | |
142 | } | |
143 | /* skip '\r' if windows line endings used. */ | |
144 | if (p < end && *p == '\r') { | |
145 | p++; | |
146 | } | |
147 | /* only accept blank lines before 'version=' line */ | |
148 | if (p == end || *p != '\n') { | |
149 | return 0; | |
150 | } | |
151 | p++; | |
152 | continue; | |
153 | } | |
154 | if (end - p >= strlen("version=X\n")) { | |
155 | if (strncmp("version=1\n", p, strlen("version=1\n")) == 0 || | |
156 | strncmp("version=2\n", p, strlen("version=2\n")) == 0) { | |
157 | return 100; | |
158 | } | |
159 | } | |
160 | if (end - p >= strlen("version=X\r\n")) { | |
161 | if (strncmp("version=1\r\n", p, strlen("version=1\r\n")) == 0 || | |
162 | strncmp("version=2\r\n", p, strlen("version=2\r\n")) == 0) { | |
163 | return 100; | |
164 | } | |
165 | } | |
166 | return 0; | |
167 | } | |
ea2384d3 | 168 | return 0; |
01fc99d6 | 169 | } |
ea2384d3 FB |
170 | } |
171 | ||
5f4da8c0 TS |
172 | #define CHECK_CID 1 |
173 | ||
3b46e624 | 174 | #define SECTOR_SIZE 512 |
f66fd6c3 FZ |
175 | #define DESC_SIZE (20 * SECTOR_SIZE) /* 20 sectors of 512 bytes each */ |
176 | #define BUF_SIZE 4096 | |
177 | #define HEADER_SIZE 512 /* first sector of 512 bytes */ | |
5f4da8c0 | 178 | |
b3976d3c FZ |
179 | static void vmdk_free_extents(BlockDriverState *bs) |
180 | { | |
181 | int i; | |
182 | BDRVVmdkState *s = bs->opaque; | |
b3c0bfb6 | 183 | VmdkExtent *e; |
b3976d3c FZ |
184 | |
185 | for (i = 0; i < s->num_extents; i++) { | |
b3c0bfb6 FZ |
186 | e = &s->extents[i]; |
187 | g_free(e->l1_table); | |
188 | g_free(e->l2_cache); | |
189 | g_free(e->l1_backup_table); | |
190 | if (e->file != bs->file) { | |
191 | bdrv_delete(e->file); | |
192 | } | |
b3976d3c | 193 | } |
7267c094 | 194 | g_free(s->extents); |
b3976d3c FZ |
195 | } |
196 | ||
86c6b429 FZ |
197 | static void vmdk_free_last_extent(BlockDriverState *bs) |
198 | { | |
199 | BDRVVmdkState *s = bs->opaque; | |
200 | ||
201 | if (s->num_extents == 0) { | |
202 | return; | |
203 | } | |
204 | s->num_extents--; | |
205 | s->extents = g_realloc(s->extents, s->num_extents * sizeof(VmdkExtent)); | |
206 | } | |
207 | ||
5f4da8c0 | 208 | static uint32_t vmdk_read_cid(BlockDriverState *bs, int parent) |
ea2384d3 | 209 | { |
5f4da8c0 | 210 | char desc[DESC_SIZE]; |
bac8d7b4 | 211 | uint32_t cid = 0; |
7ccfb2eb | 212 | const char *p_name, *cid_str; |
5f4da8c0 | 213 | size_t cid_str_size; |
e1da9b24 | 214 | BDRVVmdkState *s = bs->opaque; |
99f1835d | 215 | int ret; |
5f4da8c0 | 216 | |
99f1835d KW |
217 | ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE); |
218 | if (ret < 0) { | |
5f4da8c0 | 219 | return 0; |
e1da9b24 | 220 | } |
5f4da8c0 TS |
221 | |
222 | if (parent) { | |
223 | cid_str = "parentCID"; | |
224 | cid_str_size = sizeof("parentCID"); | |
225 | } else { | |
226 | cid_str = "CID"; | |
227 | cid_str_size = sizeof("CID"); | |
228 | } | |
229 | ||
ae261c86 FZ |
230 | p_name = strstr(desc, cid_str); |
231 | if (p_name != NULL) { | |
5f4da8c0 | 232 | p_name += cid_str_size; |
ae261c86 | 233 | sscanf(p_name, "%x", &cid); |
5f4da8c0 TS |
234 | } |
235 | ||
236 | return cid; | |
237 | } | |
238 | ||
239 | static int vmdk_write_cid(BlockDriverState *bs, uint32_t cid) | |
240 | { | |
5f4da8c0 TS |
241 | char desc[DESC_SIZE], tmp_desc[DESC_SIZE]; |
242 | char *p_name, *tmp_str; | |
e1da9b24 | 243 | BDRVVmdkState *s = bs->opaque; |
99f1835d | 244 | int ret; |
5f4da8c0 | 245 | |
e1da9b24 | 246 | memset(desc, 0, sizeof(desc)); |
99f1835d KW |
247 | ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE); |
248 | if (ret < 0) { | |
249 | return ret; | |
e1da9b24 | 250 | } |
5f4da8c0 | 251 | |
ae261c86 | 252 | tmp_str = strstr(desc, "parentCID"); |
363a37d5 | 253 | pstrcpy(tmp_desc, sizeof(tmp_desc), tmp_str); |
ae261c86 FZ |
254 | p_name = strstr(desc, "CID"); |
255 | if (p_name != NULL) { | |
5f4da8c0 | 256 | p_name += sizeof("CID"); |
363a37d5 BS |
257 | snprintf(p_name, sizeof(desc) - (p_name - desc), "%x\n", cid); |
258 | pstrcat(desc, sizeof(desc), tmp_desc); | |
5f4da8c0 TS |
259 | } |
260 | ||
99f1835d KW |
261 | ret = bdrv_pwrite_sync(bs->file, s->desc_offset, desc, DESC_SIZE); |
262 | if (ret < 0) { | |
263 | return ret; | |
e1da9b24 | 264 | } |
99f1835d | 265 | |
5f4da8c0 TS |
266 | return 0; |
267 | } | |
268 | ||
269 | static int vmdk_is_cid_valid(BlockDriverState *bs) | |
270 | { | |
271 | #ifdef CHECK_CID | |
272 | BDRVVmdkState *s = bs->opaque; | |
b171271a | 273 | BlockDriverState *p_bs = bs->backing_hd; |
5f4da8c0 TS |
274 | uint32_t cur_pcid; |
275 | ||
276 | if (p_bs) { | |
ae261c86 FZ |
277 | cur_pcid = vmdk_read_cid(p_bs, 0); |
278 | if (s->parent_cid != cur_pcid) { | |
279 | /* CID not valid */ | |
5f4da8c0 | 280 | return 0; |
ae261c86 | 281 | } |
5f4da8c0 TS |
282 | } |
283 | #endif | |
ae261c86 | 284 | /* CID valid */ |
5f4da8c0 TS |
285 | return 1; |
286 | } | |
287 | ||
9949f97e | 288 | static int vmdk_parent_open(BlockDriverState *bs) |
5f4da8c0 | 289 | { |
5fafdf24 | 290 | char *p_name; |
7fa60fa3 | 291 | char desc[DESC_SIZE + 1]; |
e1da9b24 | 292 | BDRVVmdkState *s = bs->opaque; |
588b65a3 | 293 | int ret; |
5f4da8c0 | 294 | |
7fa60fa3 | 295 | desc[DESC_SIZE] = '\0'; |
588b65a3 PB |
296 | ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE); |
297 | if (ret < 0) { | |
298 | return ret; | |
e1da9b24 | 299 | } |
5f4da8c0 | 300 | |
ae261c86 FZ |
301 | p_name = strstr(desc, "parentFileNameHint"); |
302 | if (p_name != NULL) { | |
5f4da8c0 | 303 | char *end_name; |
5f4da8c0 TS |
304 | |
305 | p_name += sizeof("parentFileNameHint") + 1; | |
ae261c86 FZ |
306 | end_name = strchr(p_name, '\"'); |
307 | if (end_name == NULL) { | |
588b65a3 | 308 | return -EINVAL; |
ae261c86 FZ |
309 | } |
310 | if ((end_name - p_name) > sizeof(bs->backing_file) - 1) { | |
588b65a3 | 311 | return -EINVAL; |
ae261c86 | 312 | } |
3b46e624 | 313 | |
b171271a | 314 | pstrcpy(bs->backing_file, end_name - p_name + 1, p_name); |
ff1afc72 | 315 | } |
5f4da8c0 TS |
316 | |
317 | return 0; | |
318 | } | |
319 | ||
b3976d3c FZ |
320 | /* Create and append extent to the extent array. Return the added VmdkExtent |
321 | * address. return NULL if allocation failed. */ | |
322 | static VmdkExtent *vmdk_add_extent(BlockDriverState *bs, | |
323 | BlockDriverState *file, bool flat, int64_t sectors, | |
324 | int64_t l1_offset, int64_t l1_backup_offset, | |
325 | uint32_t l1_size, | |
326 | int l2_size, unsigned int cluster_sectors) | |
327 | { | |
328 | VmdkExtent *extent; | |
329 | BDRVVmdkState *s = bs->opaque; | |
330 | ||
7267c094 | 331 | s->extents = g_realloc(s->extents, |
b3976d3c FZ |
332 | (s->num_extents + 1) * sizeof(VmdkExtent)); |
333 | extent = &s->extents[s->num_extents]; | |
334 | s->num_extents++; | |
335 | ||
336 | memset(extent, 0, sizeof(VmdkExtent)); | |
337 | extent->file = file; | |
338 | extent->flat = flat; | |
339 | extent->sectors = sectors; | |
340 | extent->l1_table_offset = l1_offset; | |
341 | extent->l1_backup_table_offset = l1_backup_offset; | |
342 | extent->l1_size = l1_size; | |
343 | extent->l1_entry_sectors = l2_size * cluster_sectors; | |
344 | extent->l2_size = l2_size; | |
345 | extent->cluster_sectors = cluster_sectors; | |
346 | ||
347 | if (s->num_extents > 1) { | |
348 | extent->end_sector = (*(extent - 1)).end_sector + extent->sectors; | |
349 | } else { | |
350 | extent->end_sector = extent->sectors; | |
351 | } | |
352 | bs->total_sectors = extent->end_sector; | |
353 | return extent; | |
354 | } | |
355 | ||
b4b3ab14 | 356 | static int vmdk_init_tables(BlockDriverState *bs, VmdkExtent *extent) |
5f4da8c0 | 357 | { |
b4b3ab14 FZ |
358 | int ret; |
359 | int l1_size, i; | |
5f4da8c0 | 360 | |
ea2384d3 | 361 | /* read the L1 table */ |
b3976d3c | 362 | l1_size = extent->l1_size * sizeof(uint32_t); |
7267c094 | 363 | extent->l1_table = g_malloc(l1_size); |
b4b3ab14 FZ |
364 | ret = bdrv_pread(extent->file, |
365 | extent->l1_table_offset, | |
366 | extent->l1_table, | |
367 | l1_size); | |
368 | if (ret < 0) { | |
369 | goto fail_l1; | |
b3976d3c FZ |
370 | } |
371 | for (i = 0; i < extent->l1_size; i++) { | |
372 | le32_to_cpus(&extent->l1_table[i]); | |
ea2384d3 FB |
373 | } |
374 | ||
b3976d3c | 375 | if (extent->l1_backup_table_offset) { |
7267c094 | 376 | extent->l1_backup_table = g_malloc(l1_size); |
b4b3ab14 FZ |
377 | ret = bdrv_pread(extent->file, |
378 | extent->l1_backup_table_offset, | |
379 | extent->l1_backup_table, | |
380 | l1_size); | |
381 | if (ret < 0) { | |
382 | goto fail_l1b; | |
b3976d3c FZ |
383 | } |
384 | for (i = 0; i < extent->l1_size; i++) { | |
385 | le32_to_cpus(&extent->l1_backup_table[i]); | |
ff1afc72 FB |
386 | } |
387 | } | |
388 | ||
b3976d3c | 389 | extent->l2_cache = |
7267c094 | 390 | g_malloc(extent->l2_size * L2_CACHE_SIZE * sizeof(uint32_t)); |
ea2384d3 | 391 | return 0; |
b4b3ab14 | 392 | fail_l1b: |
7267c094 | 393 | g_free(extent->l1_backup_table); |
b4b3ab14 | 394 | fail_l1: |
7267c094 | 395 | g_free(extent->l1_table); |
b4b3ab14 FZ |
396 | return ret; |
397 | } | |
398 | ||
86c6b429 FZ |
399 | static int vmdk_open_vmdk3(BlockDriverState *bs, |
400 | BlockDriverState *file, | |
401 | int flags) | |
b4b3ab14 FZ |
402 | { |
403 | int ret; | |
404 | uint32_t magic; | |
405 | VMDK3Header header; | |
406 | VmdkExtent *extent; | |
407 | ||
86c6b429 | 408 | ret = bdrv_pread(file, sizeof(magic), &header, sizeof(header)); |
b4b3ab14 | 409 | if (ret < 0) { |
86c6b429 | 410 | return ret; |
b4b3ab14 FZ |
411 | } |
412 | extent = vmdk_add_extent(bs, | |
413 | bs->file, false, | |
414 | le32_to_cpu(header.disk_sectors), | |
415 | le32_to_cpu(header.l1dir_offset) << 9, | |
416 | 0, 1 << 6, 1 << 9, | |
417 | le32_to_cpu(header.granularity)); | |
418 | ret = vmdk_init_tables(bs, extent); | |
419 | if (ret) { | |
86c6b429 FZ |
420 | /* free extent allocated by vmdk_add_extent */ |
421 | vmdk_free_last_extent(bs); | |
b4b3ab14 | 422 | } |
b4b3ab14 FZ |
423 | return ret; |
424 | } | |
425 | ||
f16f509d FZ |
426 | static int vmdk_open_desc_file(BlockDriverState *bs, int flags, |
427 | int64_t desc_offset); | |
428 | ||
86c6b429 FZ |
429 | static int vmdk_open_vmdk4(BlockDriverState *bs, |
430 | BlockDriverState *file, | |
431 | int flags) | |
b4b3ab14 FZ |
432 | { |
433 | int ret; | |
434 | uint32_t magic; | |
435 | uint32_t l1_size, l1_entry_sectors; | |
436 | VMDK4Header header; | |
b4b3ab14 | 437 | VmdkExtent *extent; |
bb45ded9 | 438 | int64_t l1_backup_offset = 0; |
b4b3ab14 | 439 | |
86c6b429 | 440 | ret = bdrv_pread(file, sizeof(magic), &header, sizeof(header)); |
b4b3ab14 | 441 | if (ret < 0) { |
86c6b429 | 442 | return ret; |
b4b3ab14 | 443 | } |
f16f509d FZ |
444 | if (header.capacity == 0 && header.desc_offset) { |
445 | return vmdk_open_desc_file(bs, flags, header.desc_offset << 9); | |
446 | } | |
b4b3ab14 FZ |
447 | l1_entry_sectors = le32_to_cpu(header.num_gtes_per_gte) |
448 | * le64_to_cpu(header.granularity); | |
86c6b429 FZ |
449 | if (l1_entry_sectors <= 0) { |
450 | return -EINVAL; | |
451 | } | |
b4b3ab14 FZ |
452 | l1_size = (le64_to_cpu(header.capacity) + l1_entry_sectors - 1) |
453 | / l1_entry_sectors; | |
bb45ded9 FZ |
454 | if (le32_to_cpu(header.flags) & VMDK4_FLAG_RGD) { |
455 | l1_backup_offset = le64_to_cpu(header.rgd_offset) << 9; | |
456 | } | |
86c6b429 | 457 | extent = vmdk_add_extent(bs, file, false, |
b4b3ab14 FZ |
458 | le64_to_cpu(header.capacity), |
459 | le64_to_cpu(header.gd_offset) << 9, | |
bb45ded9 | 460 | l1_backup_offset, |
b4b3ab14 FZ |
461 | l1_size, |
462 | le32_to_cpu(header.num_gtes_per_gte), | |
463 | le64_to_cpu(header.granularity)); | |
432bb170 FZ |
464 | extent->compressed = |
465 | le16_to_cpu(header.compressAlgorithm) == VMDK4_COMPRESSION_DEFLATE; | |
466 | extent->has_marker = le32_to_cpu(header.flags) & VMDK4_FLAG_MARKER; | |
b4b3ab14 FZ |
467 | ret = vmdk_init_tables(bs, extent); |
468 | if (ret) { | |
86c6b429 FZ |
469 | /* free extent allocated by vmdk_add_extent */ |
470 | vmdk_free_last_extent(bs); | |
b4b3ab14 | 471 | } |
b4b3ab14 FZ |
472 | return ret; |
473 | } | |
474 | ||
7fa60fa3 FZ |
475 | /* find an option value out of descriptor file */ |
476 | static int vmdk_parse_description(const char *desc, const char *opt_name, | |
477 | char *buf, int buf_size) | |
478 | { | |
479 | char *opt_pos, *opt_end; | |
480 | const char *end = desc + strlen(desc); | |
481 | ||
482 | opt_pos = strstr(desc, opt_name); | |
483 | if (!opt_pos) { | |
484 | return -1; | |
485 | } | |
486 | /* Skip "=\"" following opt_name */ | |
487 | opt_pos += strlen(opt_name) + 2; | |
488 | if (opt_pos >= end) { | |
489 | return -1; | |
490 | } | |
491 | opt_end = opt_pos; | |
492 | while (opt_end < end && *opt_end != '"') { | |
493 | opt_end++; | |
494 | } | |
495 | if (opt_end == end || buf_size < opt_end - opt_pos + 1) { | |
496 | return -1; | |
497 | } | |
498 | pstrcpy(buf, opt_end - opt_pos + 1, opt_pos); | |
499 | return 0; | |
500 | } | |
501 | ||
86c6b429 FZ |
502 | /* Open an extent file and append to bs array */ |
503 | static int vmdk_open_sparse(BlockDriverState *bs, | |
504 | BlockDriverState *file, | |
505 | int flags) | |
506 | { | |
507 | uint32_t magic; | |
508 | ||
509 | if (bdrv_pread(file, 0, &magic, sizeof(magic)) != sizeof(magic)) { | |
510 | return -EIO; | |
511 | } | |
512 | ||
513 | magic = be32_to_cpu(magic); | |
514 | switch (magic) { | |
515 | case VMDK3_MAGIC: | |
516 | return vmdk_open_vmdk3(bs, file, flags); | |
517 | break; | |
518 | case VMDK4_MAGIC: | |
519 | return vmdk_open_vmdk4(bs, file, flags); | |
520 | break; | |
521 | default: | |
522 | return -EINVAL; | |
523 | break; | |
524 | } | |
525 | } | |
526 | ||
7fa60fa3 FZ |
527 | static int vmdk_parse_extents(const char *desc, BlockDriverState *bs, |
528 | const char *desc_file_path) | |
529 | { | |
530 | int ret; | |
531 | char access[11]; | |
532 | char type[11]; | |
533 | char fname[512]; | |
534 | const char *p = desc; | |
535 | int64_t sectors = 0; | |
536 | int64_t flat_offset; | |
86c6b429 FZ |
537 | char extent_path[PATH_MAX]; |
538 | BlockDriverState *extent_file; | |
7fa60fa3 FZ |
539 | |
540 | while (*p) { | |
541 | /* parse extent line: | |
542 | * RW [size in sectors] FLAT "file-name.vmdk" OFFSET | |
543 | * or | |
544 | * RW [size in sectors] SPARSE "file-name.vmdk" | |
545 | */ | |
546 | flat_offset = -1; | |
547 | ret = sscanf(p, "%10s %" SCNd64 " %10s %511s %" SCNd64, | |
548 | access, §ors, type, fname, &flat_offset); | |
549 | if (ret < 4 || strcmp(access, "RW")) { | |
550 | goto next_line; | |
551 | } else if (!strcmp(type, "FLAT")) { | |
552 | if (ret != 5 || flat_offset < 0) { | |
553 | return -EINVAL; | |
554 | } | |
555 | } else if (ret != 4) { | |
556 | return -EINVAL; | |
557 | } | |
558 | ||
559 | /* trim the quotation marks around */ | |
560 | if (fname[0] == '"') { | |
561 | memmove(fname, fname + 1, strlen(fname)); | |
562 | if (strlen(fname) <= 1 || fname[strlen(fname) - 1] != '"') { | |
563 | return -EINVAL; | |
564 | } | |
565 | fname[strlen(fname) - 1] = '\0'; | |
566 | } | |
567 | if (sectors <= 0 || | |
568 | (strcmp(type, "FLAT") && strcmp(type, "SPARSE")) || | |
569 | (strcmp(access, "RW"))) { | |
570 | goto next_line; | |
571 | } | |
572 | ||
86c6b429 FZ |
573 | path_combine(extent_path, sizeof(extent_path), |
574 | desc_file_path, fname); | |
575 | ret = bdrv_file_open(&extent_file, extent_path, bs->open_flags); | |
576 | if (ret) { | |
577 | return ret; | |
578 | } | |
579 | ||
7fa60fa3 FZ |
580 | /* save to extents array */ |
581 | if (!strcmp(type, "FLAT")) { | |
582 | /* FLAT extent */ | |
7fa60fa3 FZ |
583 | VmdkExtent *extent; |
584 | ||
7fa60fa3 FZ |
585 | extent = vmdk_add_extent(bs, extent_file, true, sectors, |
586 | 0, 0, 0, 0, sectors); | |
f16f509d | 587 | extent->flat_start_offset = flat_offset << 9; |
86c6b429 FZ |
588 | } else if (!strcmp(type, "SPARSE")) { |
589 | /* SPARSE extent */ | |
590 | ret = vmdk_open_sparse(bs, extent_file, bs->open_flags); | |
591 | if (ret) { | |
592 | bdrv_delete(extent_file); | |
593 | return ret; | |
594 | } | |
7fa60fa3 | 595 | } else { |
7fa60fa3 FZ |
596 | fprintf(stderr, |
597 | "VMDK: Not supported extent type \"%s\""".\n", type); | |
598 | return -ENOTSUP; | |
599 | } | |
600 | next_line: | |
601 | /* move to next line */ | |
602 | while (*p && *p != '\n') { | |
603 | p++; | |
604 | } | |
605 | p++; | |
606 | } | |
607 | return 0; | |
608 | } | |
609 | ||
f16f509d FZ |
610 | static int vmdk_open_desc_file(BlockDriverState *bs, int flags, |
611 | int64_t desc_offset) | |
7fa60fa3 FZ |
612 | { |
613 | int ret; | |
614 | char buf[2048]; | |
615 | char ct[128]; | |
616 | BDRVVmdkState *s = bs->opaque; | |
617 | ||
f16f509d | 618 | ret = bdrv_pread(bs->file, desc_offset, buf, sizeof(buf)); |
7fa60fa3 FZ |
619 | if (ret < 0) { |
620 | return ret; | |
621 | } | |
622 | buf[2047] = '\0'; | |
623 | if (vmdk_parse_description(buf, "createType", ct, sizeof(ct))) { | |
624 | return -EINVAL; | |
625 | } | |
6398de51 | 626 | if (strcmp(ct, "monolithicFlat") && |
86c6b429 | 627 | strcmp(ct, "twoGbMaxExtentSparse") && |
6398de51 | 628 | strcmp(ct, "twoGbMaxExtentFlat")) { |
7fa60fa3 FZ |
629 | fprintf(stderr, |
630 | "VMDK: Not supported image type \"%s\""".\n", ct); | |
631 | return -ENOTSUP; | |
632 | } | |
633 | s->desc_offset = 0; | |
bae0a0cc | 634 | return vmdk_parse_extents(buf, bs, bs->file->filename); |
7fa60fa3 FZ |
635 | } |
636 | ||
b4b3ab14 FZ |
637 | static int vmdk_open(BlockDriverState *bs, int flags) |
638 | { | |
86c6b429 FZ |
639 | int ret; |
640 | BDRVVmdkState *s = bs->opaque; | |
b4b3ab14 | 641 | |
86c6b429 FZ |
642 | if (vmdk_open_sparse(bs, bs->file, flags) == 0) { |
643 | s->desc_offset = 0x200; | |
bae0a0cc PB |
644 | } else { |
645 | ret = vmdk_open_desc_file(bs, flags, 0); | |
86c6b429 | 646 | if (ret) { |
bae0a0cc | 647 | goto fail; |
86c6b429 | 648 | } |
b4b3ab14 | 649 | } |
bae0a0cc PB |
650 | /* try to open parent images, if exist */ |
651 | ret = vmdk_parent_open(bs); | |
652 | if (ret) { | |
653 | goto fail; | |
654 | } | |
655 | s->parent_cid = vmdk_read_cid(bs, 1); | |
848c66e8 | 656 | qemu_co_mutex_init(&s->lock); |
bae0a0cc PB |
657 | return ret; |
658 | ||
659 | fail: | |
660 | vmdk_free_extents(bs); | |
661 | return ret; | |
ea2384d3 FB |
662 | } |
663 | ||
b3976d3c FZ |
664 | static int get_whole_cluster(BlockDriverState *bs, |
665 | VmdkExtent *extent, | |
666 | uint64_t cluster_offset, | |
667 | uint64_t offset, | |
668 | bool allocate) | |
5f4da8c0 | 669 | { |
b3976d3c FZ |
670 | /* 128 sectors * 512 bytes each = grain size 64KB */ |
671 | uint8_t whole_grain[extent->cluster_sectors * 512]; | |
5f4da8c0 | 672 | |
0e69c543 FZ |
673 | /* we will be here if it's first write on non-exist grain(cluster). |
674 | * try to read from parent image, if exist */ | |
b171271a | 675 | if (bs->backing_hd) { |
c336500d | 676 | int ret; |
5f4da8c0 | 677 | |
ae261c86 | 678 | if (!vmdk_is_cid_valid(bs)) { |
5f4da8c0 | 679 | return -1; |
ae261c86 | 680 | } |
5f4da8c0 | 681 | |
0e69c543 FZ |
682 | /* floor offset to cluster */ |
683 | offset -= offset % (extent->cluster_sectors * 512); | |
c336500d | 684 | ret = bdrv_read(bs->backing_hd, offset >> 9, whole_grain, |
b3976d3c | 685 | extent->cluster_sectors); |
c336500d KW |
686 | if (ret < 0) { |
687 | return -1; | |
688 | } | |
630530a6 | 689 | |
0e69c543 | 690 | /* Write grain only into the active image */ |
b3976d3c FZ |
691 | ret = bdrv_write(extent->file, cluster_offset, whole_grain, |
692 | extent->cluster_sectors); | |
c336500d KW |
693 | if (ret < 0) { |
694 | return -1; | |
630530a6 TS |
695 | } |
696 | } | |
697 | return 0; | |
698 | } | |
699 | ||
b3976d3c | 700 | static int vmdk_L2update(VmdkExtent *extent, VmdkMetaData *m_data) |
630530a6 | 701 | { |
630530a6 | 702 | /* update L2 table */ |
b3976d3c FZ |
703 | if (bdrv_pwrite_sync( |
704 | extent->file, | |
705 | ((int64_t)m_data->l2_offset * 512) | |
706 | + (m_data->l2_index * sizeof(m_data->offset)), | |
707 | &(m_data->offset), | |
708 | sizeof(m_data->offset) | |
709 | ) < 0) { | |
630530a6 | 710 | return -1; |
b3976d3c | 711 | } |
630530a6 | 712 | /* update backup L2 table */ |
b3976d3c FZ |
713 | if (extent->l1_backup_table_offset != 0) { |
714 | m_data->l2_offset = extent->l1_backup_table[m_data->l1_index]; | |
715 | if (bdrv_pwrite_sync( | |
716 | extent->file, | |
717 | ((int64_t)m_data->l2_offset * 512) | |
718 | + (m_data->l2_index * sizeof(m_data->offset)), | |
719 | &(m_data->offset), sizeof(m_data->offset) | |
720 | ) < 0) { | |
5f4da8c0 | 721 | return -1; |
b3976d3c | 722 | } |
5f4da8c0 | 723 | } |
630530a6 | 724 | |
5f4da8c0 TS |
725 | return 0; |
726 | } | |
727 | ||
91b85bd3 | 728 | static int get_cluster_offset(BlockDriverState *bs, |
b3976d3c FZ |
729 | VmdkExtent *extent, |
730 | VmdkMetaData *m_data, | |
91b85bd3 FZ |
731 | uint64_t offset, |
732 | int allocate, | |
733 | uint64_t *cluster_offset) | |
ea2384d3 | 734 | { |
ea2384d3 FB |
735 | unsigned int l1_index, l2_offset, l2_index; |
736 | int min_index, i, j; | |
630530a6 | 737 | uint32_t min_count, *l2_table, tmp = 0; |
630530a6 | 738 | |
ae261c86 | 739 | if (m_data) { |
630530a6 | 740 | m_data->valid = 0; |
ae261c86 | 741 | } |
91b85bd3 | 742 | if (extent->flat) { |
7fa60fa3 | 743 | *cluster_offset = extent->flat_start_offset; |
91b85bd3 FZ |
744 | return 0; |
745 | } | |
630530a6 | 746 | |
6398de51 | 747 | offset -= (extent->end_sector - extent->sectors) * SECTOR_SIZE; |
b3976d3c FZ |
748 | l1_index = (offset >> 9) / extent->l1_entry_sectors; |
749 | if (l1_index >= extent->l1_size) { | |
91b85bd3 | 750 | return -1; |
b3976d3c FZ |
751 | } |
752 | l2_offset = extent->l1_table[l1_index]; | |
753 | if (!l2_offset) { | |
91b85bd3 | 754 | return -1; |
b3976d3c | 755 | } |
b4b3ab14 | 756 | for (i = 0; i < L2_CACHE_SIZE; i++) { |
b3976d3c | 757 | if (l2_offset == extent->l2_cache_offsets[i]) { |
ea2384d3 | 758 | /* increment the hit count */ |
b3976d3c | 759 | if (++extent->l2_cache_counts[i] == 0xffffffff) { |
b4b3ab14 | 760 | for (j = 0; j < L2_CACHE_SIZE; j++) { |
b3976d3c | 761 | extent->l2_cache_counts[j] >>= 1; |
ea2384d3 FB |
762 | } |
763 | } | |
b3976d3c | 764 | l2_table = extent->l2_cache + (i * extent->l2_size); |
ea2384d3 FB |
765 | goto found; |
766 | } | |
767 | } | |
768 | /* not found: load a new entry in the least used one */ | |
769 | min_index = 0; | |
770 | min_count = 0xffffffff; | |
b4b3ab14 | 771 | for (i = 0; i < L2_CACHE_SIZE; i++) { |
b3976d3c FZ |
772 | if (extent->l2_cache_counts[i] < min_count) { |
773 | min_count = extent->l2_cache_counts[i]; | |
ea2384d3 FB |
774 | min_index = i; |
775 | } | |
776 | } | |
b3976d3c FZ |
777 | l2_table = extent->l2_cache + (min_index * extent->l2_size); |
778 | if (bdrv_pread( | |
779 | extent->file, | |
780 | (int64_t)l2_offset * 512, | |
781 | l2_table, | |
782 | extent->l2_size * sizeof(uint32_t) | |
783 | ) != extent->l2_size * sizeof(uint32_t)) { | |
91b85bd3 | 784 | return -1; |
b3976d3c | 785 | } |
5f4da8c0 | 786 | |
b3976d3c FZ |
787 | extent->l2_cache_offsets[min_index] = l2_offset; |
788 | extent->l2_cache_counts[min_index] = 1; | |
ea2384d3 | 789 | found: |
b3976d3c | 790 | l2_index = ((offset >> 9) / extent->cluster_sectors) % extent->l2_size; |
91b85bd3 | 791 | *cluster_offset = le32_to_cpu(l2_table[l2_index]); |
630530a6 | 792 | |
91b85bd3 FZ |
793 | if (!*cluster_offset) { |
794 | if (!allocate) { | |
795 | return -1; | |
796 | } | |
9949f97e | 797 | |
ae261c86 | 798 | /* Avoid the L2 tables update for the images that have snapshots. */ |
91b85bd3 | 799 | *cluster_offset = bdrv_getlength(extent->file); |
2b2c8c5d FZ |
800 | if (!extent->compressed) { |
801 | bdrv_truncate( | |
802 | extent->file, | |
803 | *cluster_offset + (extent->cluster_sectors << 9) | |
804 | ); | |
805 | } | |
9949f97e | 806 | |
91b85bd3 FZ |
807 | *cluster_offset >>= 9; |
808 | tmp = cpu_to_le32(*cluster_offset); | |
9949f97e | 809 | l2_table[l2_index] = tmp; |
630530a6 | 810 | |
630530a6 TS |
811 | /* First of all we write grain itself, to avoid race condition |
812 | * that may to corrupt the image. | |
813 | * This problem may occur because of insufficient space on host disk | |
814 | * or inappropriate VM shutdown. | |
815 | */ | |
b3976d3c | 816 | if (get_whole_cluster( |
ae261c86 | 817 | bs, extent, *cluster_offset, offset, allocate) == -1) { |
91b85bd3 | 818 | return -1; |
ae261c86 | 819 | } |
630530a6 TS |
820 | |
821 | if (m_data) { | |
822 | m_data->offset = tmp; | |
823 | m_data->l1_index = l1_index; | |
824 | m_data->l2_index = l2_index; | |
825 | m_data->l2_offset = l2_offset; | |
826 | m_data->valid = 1; | |
827 | } | |
ff1afc72 | 828 | } |
91b85bd3 FZ |
829 | *cluster_offset <<= 9; |
830 | return 0; | |
ea2384d3 FB |
831 | } |
832 | ||
b3976d3c FZ |
833 | static VmdkExtent *find_extent(BDRVVmdkState *s, |
834 | int64_t sector_num, VmdkExtent *start_hint) | |
835 | { | |
836 | VmdkExtent *extent = start_hint; | |
837 | ||
838 | if (!extent) { | |
839 | extent = &s->extents[0]; | |
840 | } | |
841 | while (extent < &s->extents[s->num_extents]) { | |
842 | if (sector_num < extent->end_sector) { | |
843 | return extent; | |
844 | } | |
845 | extent++; | |
846 | } | |
847 | return NULL; | |
848 | } | |
849 | ||
5fafdf24 | 850 | static int vmdk_is_allocated(BlockDriverState *bs, int64_t sector_num, |
ea2384d3 FB |
851 | int nb_sectors, int *pnum) |
852 | { | |
853 | BDRVVmdkState *s = bs->opaque; | |
b3976d3c FZ |
854 | int64_t index_in_cluster, n, ret; |
855 | uint64_t offset; | |
856 | VmdkExtent *extent; | |
857 | ||
858 | extent = find_extent(s, sector_num, NULL); | |
859 | if (!extent) { | |
860 | return 0; | |
861 | } | |
91b85bd3 FZ |
862 | ret = get_cluster_offset(bs, extent, NULL, |
863 | sector_num * 512, 0, &offset); | |
864 | /* get_cluster_offset returning 0 means success */ | |
865 | ret = !ret; | |
866 | ||
867 | index_in_cluster = sector_num % extent->cluster_sectors; | |
868 | n = extent->cluster_sectors - index_in_cluster; | |
ae261c86 | 869 | if (n > nb_sectors) { |
ea2384d3 | 870 | n = nb_sectors; |
ae261c86 | 871 | } |
ea2384d3 | 872 | *pnum = n; |
b3976d3c | 873 | return ret; |
ea2384d3 FB |
874 | } |
875 | ||
dd3f6ee2 FZ |
876 | static int vmdk_write_extent(VmdkExtent *extent, int64_t cluster_offset, |
877 | int64_t offset_in_cluster, const uint8_t *buf, | |
878 | int nb_sectors, int64_t sector_num) | |
879 | { | |
880 | int ret; | |
2b2c8c5d FZ |
881 | VmdkGrainMarker *data = NULL; |
882 | uLongf buf_len; | |
dd3f6ee2 FZ |
883 | const uint8_t *write_buf = buf; |
884 | int write_len = nb_sectors * 512; | |
885 | ||
2b2c8c5d FZ |
886 | if (extent->compressed) { |
887 | if (!extent->has_marker) { | |
888 | ret = -EINVAL; | |
889 | goto out; | |
890 | } | |
891 | buf_len = (extent->cluster_sectors << 9) * 2; | |
892 | data = g_malloc(buf_len + sizeof(VmdkGrainMarker)); | |
893 | if (compress(data->data, &buf_len, buf, nb_sectors << 9) != Z_OK || | |
894 | buf_len == 0) { | |
895 | ret = -EINVAL; | |
896 | goto out; | |
897 | } | |
898 | data->lba = sector_num; | |
899 | data->size = buf_len; | |
900 | write_buf = (uint8_t *)data; | |
901 | write_len = buf_len + sizeof(VmdkGrainMarker); | |
902 | } | |
dd3f6ee2 FZ |
903 | ret = bdrv_pwrite(extent->file, |
904 | cluster_offset + offset_in_cluster, | |
905 | write_buf, | |
906 | write_len); | |
907 | if (ret != write_len) { | |
908 | ret = ret < 0 ? ret : -EIO; | |
909 | goto out; | |
910 | } | |
911 | ret = 0; | |
912 | out: | |
2b2c8c5d | 913 | g_free(data); |
dd3f6ee2 FZ |
914 | return ret; |
915 | } | |
916 | ||
917 | static int vmdk_read_extent(VmdkExtent *extent, int64_t cluster_offset, | |
918 | int64_t offset_in_cluster, uint8_t *buf, | |
919 | int nb_sectors) | |
920 | { | |
921 | int ret; | |
2b2c8c5d FZ |
922 | int cluster_bytes, buf_bytes; |
923 | uint8_t *cluster_buf, *compressed_data; | |
924 | uint8_t *uncomp_buf; | |
925 | uint32_t data_len; | |
926 | VmdkGrainMarker *marker; | |
927 | uLongf buf_len; | |
928 | ||
dd3f6ee2 | 929 | |
2b2c8c5d FZ |
930 | if (!extent->compressed) { |
931 | ret = bdrv_pread(extent->file, | |
932 | cluster_offset + offset_in_cluster, | |
933 | buf, nb_sectors * 512); | |
934 | if (ret == nb_sectors * 512) { | |
935 | return 0; | |
936 | } else { | |
937 | return -EIO; | |
938 | } | |
939 | } | |
940 | cluster_bytes = extent->cluster_sectors * 512; | |
941 | /* Read two clusters in case GrainMarker + compressed data > one cluster */ | |
942 | buf_bytes = cluster_bytes * 2; | |
943 | cluster_buf = g_malloc(buf_bytes); | |
944 | uncomp_buf = g_malloc(cluster_bytes); | |
dd3f6ee2 | 945 | ret = bdrv_pread(extent->file, |
2b2c8c5d FZ |
946 | cluster_offset, |
947 | cluster_buf, buf_bytes); | |
948 | if (ret < 0) { | |
949 | goto out; | |
950 | } | |
951 | compressed_data = cluster_buf; | |
952 | buf_len = cluster_bytes; | |
953 | data_len = cluster_bytes; | |
954 | if (extent->has_marker) { | |
955 | marker = (VmdkGrainMarker *)cluster_buf; | |
956 | compressed_data = marker->data; | |
957 | data_len = le32_to_cpu(marker->size); | |
958 | } | |
959 | if (!data_len || data_len > buf_bytes) { | |
960 | ret = -EINVAL; | |
961 | goto out; | |
962 | } | |
963 | ret = uncompress(uncomp_buf, &buf_len, compressed_data, data_len); | |
964 | if (ret != Z_OK) { | |
965 | ret = -EINVAL; | |
966 | goto out; | |
967 | ||
968 | } | |
969 | if (offset_in_cluster < 0 || | |
970 | offset_in_cluster + nb_sectors * 512 > buf_len) { | |
971 | ret = -EINVAL; | |
972 | goto out; | |
dd3f6ee2 | 973 | } |
2b2c8c5d FZ |
974 | memcpy(buf, uncomp_buf + offset_in_cluster, nb_sectors * 512); |
975 | ret = 0; | |
976 | ||
977 | out: | |
978 | g_free(uncomp_buf); | |
979 | g_free(cluster_buf); | |
980 | return ret; | |
dd3f6ee2 FZ |
981 | } |
982 | ||
5fafdf24 | 983 | static int vmdk_read(BlockDriverState *bs, int64_t sector_num, |
ea2384d3 FB |
984 | uint8_t *buf, int nb_sectors) |
985 | { | |
986 | BDRVVmdkState *s = bs->opaque; | |
b3976d3c FZ |
987 | int ret; |
988 | uint64_t n, index_in_cluster; | |
989 | VmdkExtent *extent = NULL; | |
ea2384d3 | 990 | uint64_t cluster_offset; |
5f4da8c0 | 991 | |
ea2384d3 | 992 | while (nb_sectors > 0) { |
b3976d3c FZ |
993 | extent = find_extent(s, sector_num, extent); |
994 | if (!extent) { | |
995 | return -EIO; | |
996 | } | |
91b85bd3 FZ |
997 | ret = get_cluster_offset( |
998 | bs, extent, NULL, | |
999 | sector_num << 9, 0, &cluster_offset); | |
b3976d3c FZ |
1000 | index_in_cluster = sector_num % extent->cluster_sectors; |
1001 | n = extent->cluster_sectors - index_in_cluster; | |
ae261c86 | 1002 | if (n > nb_sectors) { |
ea2384d3 | 1003 | n = nb_sectors; |
ae261c86 | 1004 | } |
91b85bd3 FZ |
1005 | if (ret) { |
1006 | /* if not allocated, try to read from parent image, if exist */ | |
b171271a | 1007 | if (bs->backing_hd) { |
ae261c86 | 1008 | if (!vmdk_is_cid_valid(bs)) { |
7fa60fa3 | 1009 | return -EINVAL; |
ae261c86 | 1010 | } |
b171271a | 1011 | ret = bdrv_read(bs->backing_hd, sector_num, buf, n); |
ae261c86 | 1012 | if (ret < 0) { |
7fa60fa3 | 1013 | return ret; |
ae261c86 | 1014 | } |
5f4da8c0 TS |
1015 | } else { |
1016 | memset(buf, 0, 512 * n); | |
1017 | } | |
ea2384d3 | 1018 | } else { |
dd3f6ee2 FZ |
1019 | ret = vmdk_read_extent(extent, |
1020 | cluster_offset, index_in_cluster * 512, | |
1021 | buf, n); | |
1022 | if (ret) { | |
7fa60fa3 FZ |
1023 | return ret; |
1024 | } | |
ea2384d3 FB |
1025 | } |
1026 | nb_sectors -= n; | |
1027 | sector_num += n; | |
1028 | buf += n * 512; | |
1029 | } | |
1030 | return 0; | |
1031 | } | |
1032 | ||
2914caa0 PB |
1033 | static coroutine_fn int vmdk_co_read(BlockDriverState *bs, int64_t sector_num, |
1034 | uint8_t *buf, int nb_sectors) | |
1035 | { | |
1036 | int ret; | |
1037 | BDRVVmdkState *s = bs->opaque; | |
1038 | qemu_co_mutex_lock(&s->lock); | |
1039 | ret = vmdk_read(bs, sector_num, buf, nb_sectors); | |
1040 | qemu_co_mutex_unlock(&s->lock); | |
1041 | return ret; | |
1042 | } | |
1043 | ||
5fafdf24 | 1044 | static int vmdk_write(BlockDriverState *bs, int64_t sector_num, |
ea2384d3 FB |
1045 | const uint8_t *buf, int nb_sectors) |
1046 | { | |
ff1afc72 | 1047 | BDRVVmdkState *s = bs->opaque; |
b3976d3c | 1048 | VmdkExtent *extent = NULL; |
91b85bd3 | 1049 | int n, ret; |
b3976d3c | 1050 | int64_t index_in_cluster; |
ff1afc72 | 1051 | uint64_t cluster_offset; |
b3976d3c | 1052 | VmdkMetaData m_data; |
ff1afc72 | 1053 | |
630530a6 TS |
1054 | if (sector_num > bs->total_sectors) { |
1055 | fprintf(stderr, | |
92868412 JM |
1056 | "(VMDK) Wrong offset: sector_num=0x%" PRIx64 |
1057 | " total_sectors=0x%" PRIx64 "\n", | |
630530a6 | 1058 | sector_num, bs->total_sectors); |
7fa60fa3 | 1059 | return -EIO; |
630530a6 TS |
1060 | } |
1061 | ||
ff1afc72 | 1062 | while (nb_sectors > 0) { |
b3976d3c FZ |
1063 | extent = find_extent(s, sector_num, extent); |
1064 | if (!extent) { | |
1065 | return -EIO; | |
1066 | } | |
91b85bd3 | 1067 | ret = get_cluster_offset( |
b3976d3c FZ |
1068 | bs, |
1069 | extent, | |
1070 | &m_data, | |
2b2c8c5d | 1071 | sector_num << 9, !extent->compressed, |
91b85bd3 | 1072 | &cluster_offset); |
2b2c8c5d FZ |
1073 | if (extent->compressed) { |
1074 | if (ret == 0) { | |
1075 | /* Refuse write to allocated cluster for streamOptimized */ | |
1076 | fprintf(stderr, | |
1077 | "VMDK: can't write to allocated cluster" | |
1078 | " for streamOptimized\n"); | |
1079 | return -EIO; | |
1080 | } else { | |
1081 | /* allocate */ | |
1082 | ret = get_cluster_offset( | |
1083 | bs, | |
1084 | extent, | |
1085 | &m_data, | |
1086 | sector_num << 9, 1, | |
1087 | &cluster_offset); | |
1088 | } | |
1089 | } | |
91b85bd3 FZ |
1090 | if (ret) { |
1091 | return -EINVAL; | |
b3976d3c FZ |
1092 | } |
1093 | index_in_cluster = sector_num % extent->cluster_sectors; | |
1094 | n = extent->cluster_sectors - index_in_cluster; | |
1095 | if (n > nb_sectors) { | |
1096 | n = nb_sectors; | |
1097 | } | |
630530a6 | 1098 | |
dd3f6ee2 FZ |
1099 | ret = vmdk_write_extent(extent, |
1100 | cluster_offset, index_in_cluster * 512, | |
1101 | buf, n, sector_num); | |
1102 | if (ret) { | |
7fa60fa3 | 1103 | return ret; |
b3976d3c | 1104 | } |
630530a6 TS |
1105 | if (m_data.valid) { |
1106 | /* update L2 tables */ | |
b3976d3c | 1107 | if (vmdk_L2update(extent, &m_data) == -1) { |
7fa60fa3 | 1108 | return -EIO; |
b3976d3c | 1109 | } |
630530a6 | 1110 | } |
ff1afc72 FB |
1111 | nb_sectors -= n; |
1112 | sector_num += n; | |
1113 | buf += n * 512; | |
5f4da8c0 | 1114 | |
ae261c86 FZ |
1115 | /* update CID on the first write every time the virtual disk is |
1116 | * opened */ | |
69b4d86d | 1117 | if (!s->cid_updated) { |
99f1835d KW |
1118 | ret = vmdk_write_cid(bs, time(NULL)); |
1119 | if (ret < 0) { | |
1120 | return ret; | |
1121 | } | |
69b4d86d | 1122 | s->cid_updated = true; |
5f4da8c0 | 1123 | } |
ff1afc72 FB |
1124 | } |
1125 | return 0; | |
ea2384d3 FB |
1126 | } |
1127 | ||
e183ef75 PB |
1128 | static coroutine_fn int vmdk_co_write(BlockDriverState *bs, int64_t sector_num, |
1129 | const uint8_t *buf, int nb_sectors) | |
1130 | { | |
1131 | int ret; | |
1132 | BDRVVmdkState *s = bs->opaque; | |
1133 | qemu_co_mutex_lock(&s->lock); | |
1134 | ret = vmdk_write(bs, sector_num, buf, nb_sectors); | |
1135 | qemu_co_mutex_unlock(&s->lock); | |
1136 | return ret; | |
1137 | } | |
1138 | ||
f66fd6c3 | 1139 | |
6c031aac FZ |
1140 | static int vmdk_create_extent(const char *filename, int64_t filesize, |
1141 | bool flat, bool compress) | |
8979b227 | 1142 | { |
f66fd6c3 FZ |
1143 | int ret, i; |
1144 | int fd = 0; | |
8979b227 FB |
1145 | VMDK4Header header; |
1146 | uint32_t tmp, magic, grains, gd_size, gt_size, gt_count; | |
0e7e1989 | 1147 | |
f66fd6c3 FZ |
1148 | fd = open( |
1149 | filename, | |
1150 | O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE, | |
1151 | 0644); | |
1152 | if (fd < 0) { | |
1153 | return -errno; | |
0e7e1989 | 1154 | } |
f66fd6c3 FZ |
1155 | if (flat) { |
1156 | ret = ftruncate(fd, filesize); | |
1157 | if (ret < 0) { | |
1158 | ret = -errno; | |
1159 | } | |
1160 | goto exit; | |
5f4da8c0 | 1161 | } |
8979b227 FB |
1162 | magic = cpu_to_be32(VMDK4_MAGIC); |
1163 | memset(&header, 0, sizeof(header)); | |
16372ff0 | 1164 | header.version = 1; |
6c031aac FZ |
1165 | header.flags = |
1166 | 3 | (compress ? VMDK4_FLAG_COMPRESS | VMDK4_FLAG_MARKER : 0); | |
1167 | header.compressAlgorithm = compress ? VMDK4_COMPRESSION_DEFLATE : 0; | |
f66fd6c3 | 1168 | header.capacity = filesize / 512; |
16372ff0 AG |
1169 | header.granularity = 128; |
1170 | header.num_gtes_per_gte = 512; | |
8979b227 | 1171 | |
f66fd6c3 | 1172 | grains = (filesize / 512 + header.granularity - 1) / header.granularity; |
8979b227 | 1173 | gt_size = ((header.num_gtes_per_gte * sizeof(uint32_t)) + 511) >> 9; |
f66fd6c3 FZ |
1174 | gt_count = |
1175 | (grains + header.num_gtes_per_gte - 1) / header.num_gtes_per_gte; | |
8979b227 FB |
1176 | gd_size = (gt_count * sizeof(uint32_t) + 511) >> 9; |
1177 | ||
1178 | header.desc_offset = 1; | |
1179 | header.desc_size = 20; | |
1180 | header.rgd_offset = header.desc_offset + header.desc_size; | |
1181 | header.gd_offset = header.rgd_offset + gd_size + (gt_size * gt_count); | |
1182 | header.grain_offset = | |
1183 | ((header.gd_offset + gd_size + (gt_size * gt_count) + | |
1184 | header.granularity - 1) / header.granularity) * | |
1185 | header.granularity; | |
16372ff0 AG |
1186 | /* swap endianness for all header fields */ |
1187 | header.version = cpu_to_le32(header.version); | |
1188 | header.flags = cpu_to_le32(header.flags); | |
1189 | header.capacity = cpu_to_le64(header.capacity); | |
1190 | header.granularity = cpu_to_le64(header.granularity); | |
1191 | header.num_gtes_per_gte = cpu_to_le32(header.num_gtes_per_gte); | |
8979b227 FB |
1192 | header.desc_offset = cpu_to_le64(header.desc_offset); |
1193 | header.desc_size = cpu_to_le64(header.desc_size); | |
1194 | header.rgd_offset = cpu_to_le64(header.rgd_offset); | |
1195 | header.gd_offset = cpu_to_le64(header.gd_offset); | |
1196 | header.grain_offset = cpu_to_le64(header.grain_offset); | |
6c031aac | 1197 | header.compressAlgorithm = cpu_to_le16(header.compressAlgorithm); |
8979b227 FB |
1198 | |
1199 | header.check_bytes[0] = 0xa; | |
1200 | header.check_bytes[1] = 0x20; | |
1201 | header.check_bytes[2] = 0xd; | |
1202 | header.check_bytes[3] = 0xa; | |
3b46e624 TS |
1203 | |
1204 | /* write all the data */ | |
1640366c KS |
1205 | ret = qemu_write_full(fd, &magic, sizeof(magic)); |
1206 | if (ret != sizeof(magic)) { | |
b781cce5 | 1207 | ret = -errno; |
1640366c KS |
1208 | goto exit; |
1209 | } | |
1210 | ret = qemu_write_full(fd, &header, sizeof(header)); | |
1211 | if (ret != sizeof(header)) { | |
b781cce5 | 1212 | ret = -errno; |
1640366c KS |
1213 | goto exit; |
1214 | } | |
8979b227 | 1215 | |
16372ff0 | 1216 | ret = ftruncate(fd, le64_to_cpu(header.grain_offset) << 9); |
1640366c | 1217 | if (ret < 0) { |
b781cce5 | 1218 | ret = -errno; |
1640366c KS |
1219 | goto exit; |
1220 | } | |
8979b227 FB |
1221 | |
1222 | /* write grain directory */ | |
1223 | lseek(fd, le64_to_cpu(header.rgd_offset) << 9, SEEK_SET); | |
16372ff0 | 1224 | for (i = 0, tmp = le64_to_cpu(header.rgd_offset) + gd_size; |
1640366c KS |
1225 | i < gt_count; i++, tmp += gt_size) { |
1226 | ret = qemu_write_full(fd, &tmp, sizeof(tmp)); | |
1227 | if (ret != sizeof(tmp)) { | |
b781cce5 | 1228 | ret = -errno; |
1640366c KS |
1229 | goto exit; |
1230 | } | |
1231 | } | |
3b46e624 | 1232 | |
8979b227 FB |
1233 | /* write backup grain directory */ |
1234 | lseek(fd, le64_to_cpu(header.gd_offset) << 9, SEEK_SET); | |
16372ff0 | 1235 | for (i = 0, tmp = le64_to_cpu(header.gd_offset) + gd_size; |
1640366c KS |
1236 | i < gt_count; i++, tmp += gt_size) { |
1237 | ret = qemu_write_full(fd, &tmp, sizeof(tmp)); | |
1238 | if (ret != sizeof(tmp)) { | |
b781cce5 | 1239 | ret = -errno; |
1640366c KS |
1240 | goto exit; |
1241 | } | |
1242 | } | |
8979b227 | 1243 | |
f66fd6c3 FZ |
1244 | ret = 0; |
1245 | exit: | |
1246 | close(fd); | |
1247 | return ret; | |
1248 | } | |
1249 | ||
1250 | static int filename_decompose(const char *filename, char *path, char *prefix, | |
1251 | char *postfix, size_t buf_len) | |
1252 | { | |
1253 | const char *p, *q; | |
1254 | ||
1255 | if (filename == NULL || !strlen(filename)) { | |
1256 | fprintf(stderr, "Vmdk: no filename provided.\n"); | |
1257 | return -1; | |
1258 | } | |
1259 | p = strrchr(filename, '/'); | |
1260 | if (p == NULL) { | |
1261 | p = strrchr(filename, '\\'); | |
1262 | } | |
1263 | if (p == NULL) { | |
1264 | p = strrchr(filename, ':'); | |
1265 | } | |
1266 | if (p != NULL) { | |
1267 | p++; | |
1268 | if (p - filename >= buf_len) { | |
1269 | return -1; | |
1270 | } | |
1271 | pstrcpy(path, p - filename + 1, filename); | |
1272 | } else { | |
1273 | p = filename; | |
1274 | path[0] = '\0'; | |
1275 | } | |
1276 | q = strrchr(p, '.'); | |
1277 | if (q == NULL) { | |
1278 | pstrcpy(prefix, buf_len, p); | |
1279 | postfix[0] = '\0'; | |
1280 | } else { | |
1281 | if (q - p >= buf_len) { | |
1282 | return -1; | |
1283 | } | |
1284 | pstrcpy(prefix, q - p + 1, p); | |
1285 | pstrcpy(postfix, buf_len, q); | |
1286 | } | |
1287 | return 0; | |
1288 | } | |
1289 | ||
1290 | static int relative_path(char *dest, int dest_size, | |
1291 | const char *base, const char *target) | |
1292 | { | |
1293 | int i = 0; | |
1294 | int n = 0; | |
1295 | const char *p, *q; | |
1296 | #ifdef _WIN32 | |
1297 | const char *sep = "\\"; | |
1298 | #else | |
1299 | const char *sep = "/"; | |
1300 | #endif | |
1301 | ||
1302 | if (!(dest && base && target)) { | |
1303 | return -1; | |
1304 | } | |
1305 | if (path_is_absolute(target)) { | |
1306 | dest[dest_size - 1] = '\0'; | |
1307 | strncpy(dest, target, dest_size - 1); | |
1308 | return 0; | |
1309 | } | |
1310 | while (base[i] == target[i]) { | |
1311 | i++; | |
1312 | } | |
1313 | p = &base[i]; | |
1314 | q = &target[i]; | |
1315 | while (*p) { | |
1316 | if (*p == *sep) { | |
1317 | n++; | |
1318 | } | |
1319 | p++; | |
1320 | } | |
1321 | dest[0] = '\0'; | |
1322 | for (; n; n--) { | |
1323 | pstrcat(dest, dest_size, ".."); | |
1324 | pstrcat(dest, dest_size, sep); | |
1325 | } | |
1326 | pstrcat(dest, dest_size, q); | |
1327 | return 0; | |
1328 | } | |
1329 | ||
1330 | static int vmdk_create(const char *filename, QEMUOptionParameter *options) | |
1331 | { | |
1332 | int fd, idx = 0; | |
1333 | char desc[BUF_SIZE]; | |
1334 | int64_t total_size = 0, filesize; | |
1335 | const char *backing_file = NULL; | |
1336 | const char *fmt = NULL; | |
1337 | int flags = 0; | |
1338 | int ret = 0; | |
6c031aac | 1339 | bool flat, split, compress; |
f66fd6c3 FZ |
1340 | char ext_desc_lines[BUF_SIZE] = ""; |
1341 | char path[PATH_MAX], prefix[PATH_MAX], postfix[PATH_MAX]; | |
1342 | const int64_t split_size = 0x80000000; /* VMDK has constant split size */ | |
1343 | const char *desc_extent_line; | |
1344 | char parent_desc_line[BUF_SIZE] = ""; | |
1345 | uint32_t parent_cid = 0xffffffff; | |
1346 | const char desc_template[] = | |
1347 | "# Disk DescriptorFile\n" | |
1348 | "version=1\n" | |
1349 | "CID=%x\n" | |
1350 | "parentCID=%x\n" | |
1351 | "createType=\"%s\"\n" | |
1352 | "%s" | |
1353 | "\n" | |
1354 | "# Extent description\n" | |
1355 | "%s" | |
1356 | "\n" | |
1357 | "# The Disk Data Base\n" | |
1358 | "#DDB\n" | |
1359 | "\n" | |
1360 | "ddb.virtualHWVersion = \"%d\"\n" | |
1361 | "ddb.geometry.cylinders = \"%" PRId64 "\"\n" | |
1362 | "ddb.geometry.heads = \"16\"\n" | |
1363 | "ddb.geometry.sectors = \"63\"\n" | |
1364 | "ddb.adapterType = \"ide\"\n"; | |
1365 | ||
1366 | if (filename_decompose(filename, path, prefix, postfix, PATH_MAX)) { | |
1367 | return -EINVAL; | |
1368 | } | |
1369 | /* Read out options */ | |
1370 | while (options && options->name) { | |
1371 | if (!strcmp(options->name, BLOCK_OPT_SIZE)) { | |
1372 | total_size = options->value.n; | |
1373 | } else if (!strcmp(options->name, BLOCK_OPT_BACKING_FILE)) { | |
1374 | backing_file = options->value.s; | |
1375 | } else if (!strcmp(options->name, BLOCK_OPT_COMPAT6)) { | |
1376 | flags |= options->value.n ? BLOCK_FLAG_COMPAT6 : 0; | |
1377 | } else if (!strcmp(options->name, BLOCK_OPT_SUBFMT)) { | |
1378 | fmt = options->value.s; | |
1379 | } | |
1380 | options++; | |
1381 | } | |
1382 | if (!fmt) { | |
1383 | /* Default format to monolithicSparse */ | |
1384 | fmt = "monolithicSparse"; | |
1385 | } else if (strcmp(fmt, "monolithicFlat") && | |
1386 | strcmp(fmt, "monolithicSparse") && | |
1387 | strcmp(fmt, "twoGbMaxExtentSparse") && | |
6c031aac FZ |
1388 | strcmp(fmt, "twoGbMaxExtentFlat") && |
1389 | strcmp(fmt, "streamOptimized")) { | |
f66fd6c3 FZ |
1390 | fprintf(stderr, "VMDK: Unknown subformat: %s\n", fmt); |
1391 | return -EINVAL; | |
1392 | } | |
1393 | split = !(strcmp(fmt, "twoGbMaxExtentFlat") && | |
1394 | strcmp(fmt, "twoGbMaxExtentSparse")); | |
1395 | flat = !(strcmp(fmt, "monolithicFlat") && | |
1396 | strcmp(fmt, "twoGbMaxExtentFlat")); | |
6c031aac | 1397 | compress = !strcmp(fmt, "streamOptimized"); |
f66fd6c3 FZ |
1398 | if (flat) { |
1399 | desc_extent_line = "RW %lld FLAT \"%s\" 0\n"; | |
1400 | } else { | |
1401 | desc_extent_line = "RW %lld SPARSE \"%s\"\n"; | |
1402 | } | |
1403 | if (flat && backing_file) { | |
1404 | /* not supporting backing file for flat image */ | |
1405 | return -ENOTSUP; | |
1406 | } | |
1407 | if (backing_file) { | |
1408 | char parent_filename[PATH_MAX]; | |
1409 | BlockDriverState *bs = bdrv_new(""); | |
1410 | ret = bdrv_open(bs, backing_file, 0, NULL); | |
1411 | if (ret != 0) { | |
1412 | bdrv_delete(bs); | |
1413 | return ret; | |
1414 | } | |
1415 | if (strcmp(bs->drv->format_name, "vmdk")) { | |
1416 | bdrv_delete(bs); | |
1417 | return -EINVAL; | |
1418 | } | |
1419 | filesize = bdrv_getlength(bs); | |
1420 | parent_cid = vmdk_read_cid(bs, 0); | |
1421 | bdrv_delete(bs); | |
1422 | relative_path(parent_filename, sizeof(parent_filename), | |
1423 | filename, backing_file); | |
1424 | snprintf(parent_desc_line, sizeof(parent_desc_line), | |
1425 | "parentFileNameHint=\"%s\"", parent_filename); | |
1426 | } | |
1427 | ||
1428 | /* Create extents */ | |
1429 | filesize = total_size; | |
1430 | while (filesize > 0) { | |
1431 | char desc_line[BUF_SIZE]; | |
1432 | char ext_filename[PATH_MAX]; | |
1433 | char desc_filename[PATH_MAX]; | |
1434 | int64_t size = filesize; | |
1435 | ||
1436 | if (split && size > split_size) { | |
1437 | size = split_size; | |
1438 | } | |
1439 | if (split) { | |
1440 | snprintf(desc_filename, sizeof(desc_filename), "%s-%c%03d%s", | |
1441 | prefix, flat ? 'f' : 's', ++idx, postfix); | |
1442 | } else if (flat) { | |
1443 | snprintf(desc_filename, sizeof(desc_filename), "%s-flat%s", | |
1444 | prefix, postfix); | |
1445 | } else { | |
1446 | snprintf(desc_filename, sizeof(desc_filename), "%s%s", | |
1447 | prefix, postfix); | |
1448 | } | |
1449 | snprintf(ext_filename, sizeof(ext_filename), "%s%s", | |
1450 | path, desc_filename); | |
1451 | ||
6c031aac | 1452 | if (vmdk_create_extent(ext_filename, size, flat, compress)) { |
f66fd6c3 FZ |
1453 | return -EINVAL; |
1454 | } | |
1455 | filesize -= size; | |
1456 | ||
1457 | /* Format description line */ | |
1458 | snprintf(desc_line, sizeof(desc_line), | |
1459 | desc_extent_line, size / 512, desc_filename); | |
1460 | pstrcat(ext_desc_lines, sizeof(ext_desc_lines), desc_line); | |
1461 | } | |
1462 | /* generate descriptor file */ | |
1463 | snprintf(desc, sizeof(desc), desc_template, | |
1464 | (unsigned int)time(NULL), | |
1465 | parent_cid, | |
1466 | fmt, | |
1467 | parent_desc_line, | |
1468 | ext_desc_lines, | |
1469 | (flags & BLOCK_FLAG_COMPAT6 ? 6 : 4), | |
1470 | total_size / (int64_t)(63 * 16 * 512)); | |
1471 | if (split || flat) { | |
1472 | fd = open( | |
1473 | filename, | |
1474 | O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE, | |
1475 | 0644); | |
1476 | } else { | |
1477 | fd = open( | |
1478 | filename, | |
1479 | O_WRONLY | O_BINARY | O_LARGEFILE, | |
1480 | 0644); | |
1481 | } | |
1482 | if (fd < 0) { | |
1483 | return -errno; | |
1484 | } | |
1485 | /* the descriptor offset = 0x200 */ | |
1486 | if (!split && !flat && 0x200 != lseek(fd, 0x200, SEEK_SET)) { | |
1487 | ret = -errno; | |
1488 | goto exit; | |
1489 | } | |
1640366c KS |
1490 | ret = qemu_write_full(fd, desc, strlen(desc)); |
1491 | if (ret != strlen(desc)) { | |
b781cce5 | 1492 | ret = -errno; |
1640366c KS |
1493 | goto exit; |
1494 | } | |
1640366c KS |
1495 | ret = 0; |
1496 | exit: | |
8979b227 | 1497 | close(fd); |
1640366c | 1498 | return ret; |
8979b227 FB |
1499 | } |
1500 | ||
e2731add | 1501 | static void vmdk_close(BlockDriverState *bs) |
ea2384d3 | 1502 | { |
b3976d3c | 1503 | vmdk_free_extents(bs); |
ea2384d3 FB |
1504 | } |
1505 | ||
8b94ff85 | 1506 | static coroutine_fn int vmdk_co_flush(BlockDriverState *bs) |
7a6cba61 | 1507 | { |
333c574d FZ |
1508 | int i, ret, err; |
1509 | BDRVVmdkState *s = bs->opaque; | |
1510 | ||
8b94ff85 | 1511 | ret = bdrv_co_flush(bs->file); |
333c574d | 1512 | for (i = 0; i < s->num_extents; i++) { |
8b94ff85 | 1513 | err = bdrv_co_flush(s->extents[i].file); |
333c574d FZ |
1514 | if (err < 0) { |
1515 | ret = err; | |
1516 | } | |
1517 | } | |
1518 | return ret; | |
7a6cba61 PB |
1519 | } |
1520 | ||
4a1d5e1f FZ |
1521 | static int64_t vmdk_get_allocated_file_size(BlockDriverState *bs) |
1522 | { | |
1523 | int i; | |
1524 | int64_t ret = 0; | |
1525 | int64_t r; | |
1526 | BDRVVmdkState *s = bs->opaque; | |
1527 | ||
1528 | ret = bdrv_get_allocated_file_size(bs->file); | |
1529 | if (ret < 0) { | |
1530 | return ret; | |
1531 | } | |
1532 | for (i = 0; i < s->num_extents; i++) { | |
1533 | if (s->extents[i].file == bs->file) { | |
1534 | continue; | |
1535 | } | |
1536 | r = bdrv_get_allocated_file_size(s->extents[i].file); | |
1537 | if (r < 0) { | |
1538 | return r; | |
1539 | } | |
1540 | ret += r; | |
1541 | } | |
1542 | return ret; | |
1543 | } | |
0e7e1989 KW |
1544 | |
1545 | static QEMUOptionParameter vmdk_create_options[] = { | |
db08adf5 KW |
1546 | { |
1547 | .name = BLOCK_OPT_SIZE, | |
1548 | .type = OPT_SIZE, | |
1549 | .help = "Virtual disk size" | |
1550 | }, | |
1551 | { | |
1552 | .name = BLOCK_OPT_BACKING_FILE, | |
1553 | .type = OPT_STRING, | |
1554 | .help = "File name of a base image" | |
1555 | }, | |
1556 | { | |
1557 | .name = BLOCK_OPT_COMPAT6, | |
1558 | .type = OPT_FLAG, | |
1559 | .help = "VMDK version 6 image" | |
1560 | }, | |
f66fd6c3 FZ |
1561 | { |
1562 | .name = BLOCK_OPT_SUBFMT, | |
1563 | .type = OPT_STRING, | |
1564 | .help = | |
1565 | "VMDK flat extent format, can be one of " | |
6c031aac | 1566 | "{monolithicSparse (default) | monolithicFlat | twoGbMaxExtentSparse | twoGbMaxExtentFlat | streamOptimized} " |
f66fd6c3 | 1567 | }, |
0e7e1989 KW |
1568 | { NULL } |
1569 | }; | |
1570 | ||
5efa9d5a | 1571 | static BlockDriver bdrv_vmdk = { |
ae261c86 FZ |
1572 | .format_name = "vmdk", |
1573 | .instance_size = sizeof(BDRVVmdkState), | |
1574 | .bdrv_probe = vmdk_probe, | |
6511ef77 | 1575 | .bdrv_open = vmdk_open, |
2914caa0 | 1576 | .bdrv_read = vmdk_co_read, |
e183ef75 | 1577 | .bdrv_write = vmdk_co_write, |
ae261c86 FZ |
1578 | .bdrv_close = vmdk_close, |
1579 | .bdrv_create = vmdk_create, | |
8b94ff85 | 1580 | .bdrv_co_flush = vmdk_co_flush, |
ae261c86 | 1581 | .bdrv_is_allocated = vmdk_is_allocated, |
4a1d5e1f | 1582 | .bdrv_get_allocated_file_size = vmdk_get_allocated_file_size, |
0e7e1989 KW |
1583 | |
1584 | .create_options = vmdk_create_options, | |
ea2384d3 | 1585 | }; |
5efa9d5a AL |
1586 | |
1587 | static void bdrv_vmdk_init(void) | |
1588 | { | |
1589 | bdrv_register(&bdrv_vmdk); | |
1590 | } | |
1591 | ||
1592 | block_init(bdrv_vmdk_init); |