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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" |
2bc3166c | 29 | #include "migration.h" |
2923d34f | 30 | #include <zlib.h> |
ea2384d3 | 31 | |
ea2384d3 FB |
32 | #define VMDK3_MAGIC (('C' << 24) | ('O' << 16) | ('W' << 8) | 'D') |
33 | #define VMDK4_MAGIC (('K' << 24) | ('D' << 16) | ('M' << 8) | 'V') | |
432bb170 | 34 | #define VMDK4_COMPRESSION_DEFLATE 1 |
bb45ded9 | 35 | #define VMDK4_FLAG_RGD (1 << 1) |
432bb170 FZ |
36 | #define VMDK4_FLAG_COMPRESS (1 << 16) |
37 | #define VMDK4_FLAG_MARKER (1 << 17) | |
65bd155c | 38 | #define VMDK4_GD_AT_END 0xffffffffffffffffULL |
ea2384d3 FB |
39 | |
40 | typedef struct { | |
41 | uint32_t version; | |
42 | uint32_t flags; | |
43 | uint32_t disk_sectors; | |
44 | uint32_t granularity; | |
45 | uint32_t l1dir_offset; | |
46 | uint32_t l1dir_size; | |
47 | uint32_t file_sectors; | |
48 | uint32_t cylinders; | |
49 | uint32_t heads; | |
50 | uint32_t sectors_per_track; | |
51 | } VMDK3Header; | |
52 | ||
53 | typedef struct { | |
54 | uint32_t version; | |
55 | uint32_t flags; | |
56 | int64_t capacity; | |
57 | int64_t granularity; | |
58 | int64_t desc_offset; | |
59 | int64_t desc_size; | |
60 | int32_t num_gtes_per_gte; | |
bb45ded9 | 61 | int64_t rgd_offset; |
7a736bfa | 62 | int64_t gd_offset; |
ea2384d3 FB |
63 | int64_t grain_offset; |
64 | char filler[1]; | |
65 | char check_bytes[4]; | |
432bb170 | 66 | uint16_t compressAlgorithm; |
541dc0d4 | 67 | } QEMU_PACKED VMDK4Header; |
ea2384d3 FB |
68 | |
69 | #define L2_CACHE_SIZE 16 | |
70 | ||
b3976d3c FZ |
71 | typedef struct VmdkExtent { |
72 | BlockDriverState *file; | |
73 | bool flat; | |
432bb170 FZ |
74 | bool compressed; |
75 | bool has_marker; | |
b3976d3c FZ |
76 | int64_t sectors; |
77 | int64_t end_sector; | |
7fa60fa3 | 78 | int64_t flat_start_offset; |
ea2384d3 | 79 | int64_t l1_table_offset; |
ff1afc72 | 80 | int64_t l1_backup_table_offset; |
ea2384d3 | 81 | uint32_t *l1_table; |
ff1afc72 | 82 | uint32_t *l1_backup_table; |
ea2384d3 FB |
83 | unsigned int l1_size; |
84 | uint32_t l1_entry_sectors; | |
85 | ||
86 | unsigned int l2_size; | |
87 | uint32_t *l2_cache; | |
88 | uint32_t l2_cache_offsets[L2_CACHE_SIZE]; | |
89 | uint32_t l2_cache_counts[L2_CACHE_SIZE]; | |
90 | ||
91 | unsigned int cluster_sectors; | |
b3976d3c FZ |
92 | } VmdkExtent; |
93 | ||
94 | typedef struct BDRVVmdkState { | |
848c66e8 | 95 | CoMutex lock; |
e1da9b24 | 96 | int desc_offset; |
69b4d86d | 97 | bool cid_updated; |
5f4da8c0 | 98 | uint32_t parent_cid; |
b3976d3c FZ |
99 | int num_extents; |
100 | /* Extent array with num_extents entries, ascend ordered by address */ | |
101 | VmdkExtent *extents; | |
2bc3166c | 102 | Error *migration_blocker; |
ea2384d3 FB |
103 | } BDRVVmdkState; |
104 | ||
630530a6 TS |
105 | typedef struct VmdkMetaData { |
106 | uint32_t offset; | |
107 | unsigned int l1_index; | |
108 | unsigned int l2_index; | |
109 | unsigned int l2_offset; | |
110 | int valid; | |
111 | } VmdkMetaData; | |
112 | ||
432bb170 FZ |
113 | typedef struct VmdkGrainMarker { |
114 | uint64_t lba; | |
115 | uint32_t size; | |
116 | uint8_t data[0]; | |
117 | } VmdkGrainMarker; | |
118 | ||
65bd155c KW |
119 | enum { |
120 | MARKER_END_OF_STREAM = 0, | |
121 | MARKER_GRAIN_TABLE = 1, | |
122 | MARKER_GRAIN_DIRECTORY = 2, | |
123 | MARKER_FOOTER = 3, | |
124 | }; | |
125 | ||
ea2384d3 FB |
126 | static int vmdk_probe(const uint8_t *buf, int buf_size, const char *filename) |
127 | { | |
128 | uint32_t magic; | |
129 | ||
ae261c86 | 130 | if (buf_size < 4) { |
ea2384d3 | 131 | return 0; |
ae261c86 | 132 | } |
ea2384d3 FB |
133 | magic = be32_to_cpu(*(uint32_t *)buf); |
134 | if (magic == VMDK3_MAGIC || | |
01fc99d6 | 135 | magic == VMDK4_MAGIC) { |
ea2384d3 | 136 | return 100; |
01fc99d6 FZ |
137 | } else { |
138 | const char *p = (const char *)buf; | |
139 | const char *end = p + buf_size; | |
140 | while (p < end) { | |
141 | if (*p == '#') { | |
142 | /* skip comment line */ | |
143 | while (p < end && *p != '\n') { | |
144 | p++; | |
145 | } | |
146 | p++; | |
147 | continue; | |
148 | } | |
149 | if (*p == ' ') { | |
150 | while (p < end && *p == ' ') { | |
151 | p++; | |
152 | } | |
153 | /* skip '\r' if windows line endings used. */ | |
154 | if (p < end && *p == '\r') { | |
155 | p++; | |
156 | } | |
157 | /* only accept blank lines before 'version=' line */ | |
158 | if (p == end || *p != '\n') { | |
159 | return 0; | |
160 | } | |
161 | p++; | |
162 | continue; | |
163 | } | |
164 | if (end - p >= strlen("version=X\n")) { | |
165 | if (strncmp("version=1\n", p, strlen("version=1\n")) == 0 || | |
166 | strncmp("version=2\n", p, strlen("version=2\n")) == 0) { | |
167 | return 100; | |
168 | } | |
169 | } | |
170 | if (end - p >= strlen("version=X\r\n")) { | |
171 | if (strncmp("version=1\r\n", p, strlen("version=1\r\n")) == 0 || | |
172 | strncmp("version=2\r\n", p, strlen("version=2\r\n")) == 0) { | |
173 | return 100; | |
174 | } | |
175 | } | |
176 | return 0; | |
177 | } | |
ea2384d3 | 178 | return 0; |
01fc99d6 | 179 | } |
ea2384d3 FB |
180 | } |
181 | ||
5f4da8c0 TS |
182 | #define CHECK_CID 1 |
183 | ||
3b46e624 | 184 | #define SECTOR_SIZE 512 |
f66fd6c3 FZ |
185 | #define DESC_SIZE (20 * SECTOR_SIZE) /* 20 sectors of 512 bytes each */ |
186 | #define BUF_SIZE 4096 | |
187 | #define HEADER_SIZE 512 /* first sector of 512 bytes */ | |
5f4da8c0 | 188 | |
b3976d3c FZ |
189 | static void vmdk_free_extents(BlockDriverState *bs) |
190 | { | |
191 | int i; | |
192 | BDRVVmdkState *s = bs->opaque; | |
b3c0bfb6 | 193 | VmdkExtent *e; |
b3976d3c FZ |
194 | |
195 | for (i = 0; i < s->num_extents; i++) { | |
b3c0bfb6 FZ |
196 | e = &s->extents[i]; |
197 | g_free(e->l1_table); | |
198 | g_free(e->l2_cache); | |
199 | g_free(e->l1_backup_table); | |
200 | if (e->file != bs->file) { | |
201 | bdrv_delete(e->file); | |
202 | } | |
b3976d3c | 203 | } |
7267c094 | 204 | g_free(s->extents); |
b3976d3c FZ |
205 | } |
206 | ||
86c6b429 FZ |
207 | static void vmdk_free_last_extent(BlockDriverState *bs) |
208 | { | |
209 | BDRVVmdkState *s = bs->opaque; | |
210 | ||
211 | if (s->num_extents == 0) { | |
212 | return; | |
213 | } | |
214 | s->num_extents--; | |
215 | s->extents = g_realloc(s->extents, s->num_extents * sizeof(VmdkExtent)); | |
216 | } | |
217 | ||
5f4da8c0 | 218 | static uint32_t vmdk_read_cid(BlockDriverState *bs, int parent) |
ea2384d3 | 219 | { |
5f4da8c0 | 220 | char desc[DESC_SIZE]; |
8379e46d | 221 | uint32_t cid = 0xffffffff; |
7ccfb2eb | 222 | const char *p_name, *cid_str; |
5f4da8c0 | 223 | size_t cid_str_size; |
e1da9b24 | 224 | BDRVVmdkState *s = bs->opaque; |
99f1835d | 225 | int ret; |
5f4da8c0 | 226 | |
99f1835d KW |
227 | ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE); |
228 | if (ret < 0) { | |
5f4da8c0 | 229 | return 0; |
e1da9b24 | 230 | } |
5f4da8c0 TS |
231 | |
232 | if (parent) { | |
233 | cid_str = "parentCID"; | |
234 | cid_str_size = sizeof("parentCID"); | |
235 | } else { | |
236 | cid_str = "CID"; | |
237 | cid_str_size = sizeof("CID"); | |
238 | } | |
239 | ||
93897b9f | 240 | desc[DESC_SIZE - 1] = '\0'; |
ae261c86 FZ |
241 | p_name = strstr(desc, cid_str); |
242 | if (p_name != NULL) { | |
5f4da8c0 | 243 | p_name += cid_str_size; |
ae261c86 | 244 | sscanf(p_name, "%x", &cid); |
5f4da8c0 TS |
245 | } |
246 | ||
247 | return cid; | |
248 | } | |
249 | ||
250 | static int vmdk_write_cid(BlockDriverState *bs, uint32_t cid) | |
251 | { | |
5f4da8c0 TS |
252 | char desc[DESC_SIZE], tmp_desc[DESC_SIZE]; |
253 | char *p_name, *tmp_str; | |
e1da9b24 | 254 | BDRVVmdkState *s = bs->opaque; |
99f1835d | 255 | int ret; |
5f4da8c0 | 256 | |
99f1835d KW |
257 | ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE); |
258 | if (ret < 0) { | |
259 | return ret; | |
e1da9b24 | 260 | } |
5f4da8c0 | 261 | |
93897b9f | 262 | desc[DESC_SIZE - 1] = '\0'; |
ae261c86 | 263 | tmp_str = strstr(desc, "parentCID"); |
93897b9f KW |
264 | if (tmp_str == NULL) { |
265 | return -EINVAL; | |
266 | } | |
267 | ||
363a37d5 | 268 | pstrcpy(tmp_desc, sizeof(tmp_desc), tmp_str); |
ae261c86 FZ |
269 | p_name = strstr(desc, "CID"); |
270 | if (p_name != NULL) { | |
5f4da8c0 | 271 | p_name += sizeof("CID"); |
363a37d5 BS |
272 | snprintf(p_name, sizeof(desc) - (p_name - desc), "%x\n", cid); |
273 | pstrcat(desc, sizeof(desc), tmp_desc); | |
5f4da8c0 TS |
274 | } |
275 | ||
99f1835d KW |
276 | ret = bdrv_pwrite_sync(bs->file, s->desc_offset, desc, DESC_SIZE); |
277 | if (ret < 0) { | |
278 | return ret; | |
e1da9b24 | 279 | } |
99f1835d | 280 | |
5f4da8c0 TS |
281 | return 0; |
282 | } | |
283 | ||
284 | static int vmdk_is_cid_valid(BlockDriverState *bs) | |
285 | { | |
286 | #ifdef CHECK_CID | |
287 | BDRVVmdkState *s = bs->opaque; | |
b171271a | 288 | BlockDriverState *p_bs = bs->backing_hd; |
5f4da8c0 TS |
289 | uint32_t cur_pcid; |
290 | ||
291 | if (p_bs) { | |
ae261c86 FZ |
292 | cur_pcid = vmdk_read_cid(p_bs, 0); |
293 | if (s->parent_cid != cur_pcid) { | |
294 | /* CID not valid */ | |
5f4da8c0 | 295 | return 0; |
ae261c86 | 296 | } |
5f4da8c0 TS |
297 | } |
298 | #endif | |
ae261c86 | 299 | /* CID valid */ |
5f4da8c0 TS |
300 | return 1; |
301 | } | |
302 | ||
9949f97e | 303 | static int vmdk_parent_open(BlockDriverState *bs) |
5f4da8c0 | 304 | { |
5fafdf24 | 305 | char *p_name; |
7fa60fa3 | 306 | char desc[DESC_SIZE + 1]; |
e1da9b24 | 307 | BDRVVmdkState *s = bs->opaque; |
588b65a3 | 308 | int ret; |
5f4da8c0 | 309 | |
7fa60fa3 | 310 | desc[DESC_SIZE] = '\0'; |
588b65a3 PB |
311 | ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE); |
312 | if (ret < 0) { | |
313 | return ret; | |
e1da9b24 | 314 | } |
5f4da8c0 | 315 | |
ae261c86 FZ |
316 | p_name = strstr(desc, "parentFileNameHint"); |
317 | if (p_name != NULL) { | |
5f4da8c0 | 318 | char *end_name; |
5f4da8c0 TS |
319 | |
320 | p_name += sizeof("parentFileNameHint") + 1; | |
ae261c86 FZ |
321 | end_name = strchr(p_name, '\"'); |
322 | if (end_name == NULL) { | |
588b65a3 | 323 | return -EINVAL; |
ae261c86 FZ |
324 | } |
325 | if ((end_name - p_name) > sizeof(bs->backing_file) - 1) { | |
588b65a3 | 326 | return -EINVAL; |
ae261c86 | 327 | } |
3b46e624 | 328 | |
b171271a | 329 | pstrcpy(bs->backing_file, end_name - p_name + 1, p_name); |
ff1afc72 | 330 | } |
5f4da8c0 TS |
331 | |
332 | return 0; | |
333 | } | |
334 | ||
b3976d3c FZ |
335 | /* Create and append extent to the extent array. Return the added VmdkExtent |
336 | * address. return NULL if allocation failed. */ | |
337 | static VmdkExtent *vmdk_add_extent(BlockDriverState *bs, | |
338 | BlockDriverState *file, bool flat, int64_t sectors, | |
339 | int64_t l1_offset, int64_t l1_backup_offset, | |
340 | uint32_t l1_size, | |
341 | int l2_size, unsigned int cluster_sectors) | |
342 | { | |
343 | VmdkExtent *extent; | |
344 | BDRVVmdkState *s = bs->opaque; | |
345 | ||
7267c094 | 346 | s->extents = g_realloc(s->extents, |
b3976d3c FZ |
347 | (s->num_extents + 1) * sizeof(VmdkExtent)); |
348 | extent = &s->extents[s->num_extents]; | |
349 | s->num_extents++; | |
350 | ||
351 | memset(extent, 0, sizeof(VmdkExtent)); | |
352 | extent->file = file; | |
353 | extent->flat = flat; | |
354 | extent->sectors = sectors; | |
355 | extent->l1_table_offset = l1_offset; | |
356 | extent->l1_backup_table_offset = l1_backup_offset; | |
357 | extent->l1_size = l1_size; | |
358 | extent->l1_entry_sectors = l2_size * cluster_sectors; | |
359 | extent->l2_size = l2_size; | |
360 | extent->cluster_sectors = cluster_sectors; | |
361 | ||
362 | if (s->num_extents > 1) { | |
363 | extent->end_sector = (*(extent - 1)).end_sector + extent->sectors; | |
364 | } else { | |
365 | extent->end_sector = extent->sectors; | |
366 | } | |
367 | bs->total_sectors = extent->end_sector; | |
368 | return extent; | |
369 | } | |
370 | ||
b4b3ab14 | 371 | static int vmdk_init_tables(BlockDriverState *bs, VmdkExtent *extent) |
5f4da8c0 | 372 | { |
b4b3ab14 FZ |
373 | int ret; |
374 | int l1_size, i; | |
5f4da8c0 | 375 | |
ea2384d3 | 376 | /* read the L1 table */ |
b3976d3c | 377 | l1_size = extent->l1_size * sizeof(uint32_t); |
7267c094 | 378 | extent->l1_table = g_malloc(l1_size); |
b4b3ab14 FZ |
379 | ret = bdrv_pread(extent->file, |
380 | extent->l1_table_offset, | |
381 | extent->l1_table, | |
382 | l1_size); | |
383 | if (ret < 0) { | |
384 | goto fail_l1; | |
b3976d3c FZ |
385 | } |
386 | for (i = 0; i < extent->l1_size; i++) { | |
387 | le32_to_cpus(&extent->l1_table[i]); | |
ea2384d3 FB |
388 | } |
389 | ||
b3976d3c | 390 | if (extent->l1_backup_table_offset) { |
7267c094 | 391 | extent->l1_backup_table = g_malloc(l1_size); |
b4b3ab14 FZ |
392 | ret = bdrv_pread(extent->file, |
393 | extent->l1_backup_table_offset, | |
394 | extent->l1_backup_table, | |
395 | l1_size); | |
396 | if (ret < 0) { | |
397 | goto fail_l1b; | |
b3976d3c FZ |
398 | } |
399 | for (i = 0; i < extent->l1_size; i++) { | |
400 | le32_to_cpus(&extent->l1_backup_table[i]); | |
ff1afc72 FB |
401 | } |
402 | } | |
403 | ||
b3976d3c | 404 | extent->l2_cache = |
7267c094 | 405 | g_malloc(extent->l2_size * L2_CACHE_SIZE * sizeof(uint32_t)); |
ea2384d3 | 406 | return 0; |
b4b3ab14 | 407 | fail_l1b: |
7267c094 | 408 | g_free(extent->l1_backup_table); |
b4b3ab14 | 409 | fail_l1: |
7267c094 | 410 | g_free(extent->l1_table); |
b4b3ab14 FZ |
411 | return ret; |
412 | } | |
413 | ||
86c6b429 FZ |
414 | static int vmdk_open_vmdk3(BlockDriverState *bs, |
415 | BlockDriverState *file, | |
416 | int flags) | |
b4b3ab14 FZ |
417 | { |
418 | int ret; | |
419 | uint32_t magic; | |
420 | VMDK3Header header; | |
421 | VmdkExtent *extent; | |
422 | ||
86c6b429 | 423 | ret = bdrv_pread(file, sizeof(magic), &header, sizeof(header)); |
b4b3ab14 | 424 | if (ret < 0) { |
86c6b429 | 425 | return ret; |
b4b3ab14 FZ |
426 | } |
427 | extent = vmdk_add_extent(bs, | |
428 | bs->file, false, | |
429 | le32_to_cpu(header.disk_sectors), | |
430 | le32_to_cpu(header.l1dir_offset) << 9, | |
431 | 0, 1 << 6, 1 << 9, | |
432 | le32_to_cpu(header.granularity)); | |
433 | ret = vmdk_init_tables(bs, extent); | |
434 | if (ret) { | |
86c6b429 FZ |
435 | /* free extent allocated by vmdk_add_extent */ |
436 | vmdk_free_last_extent(bs); | |
b4b3ab14 | 437 | } |
b4b3ab14 FZ |
438 | return ret; |
439 | } | |
440 | ||
f16f509d FZ |
441 | static int vmdk_open_desc_file(BlockDriverState *bs, int flags, |
442 | int64_t desc_offset); | |
443 | ||
86c6b429 FZ |
444 | static int vmdk_open_vmdk4(BlockDriverState *bs, |
445 | BlockDriverState *file, | |
446 | int flags) | |
b4b3ab14 FZ |
447 | { |
448 | int ret; | |
449 | uint32_t magic; | |
450 | uint32_t l1_size, l1_entry_sectors; | |
451 | VMDK4Header header; | |
b4b3ab14 | 452 | VmdkExtent *extent; |
bb45ded9 | 453 | int64_t l1_backup_offset = 0; |
b4b3ab14 | 454 | |
86c6b429 | 455 | ret = bdrv_pread(file, sizeof(magic), &header, sizeof(header)); |
b4b3ab14 | 456 | if (ret < 0) { |
86c6b429 | 457 | return ret; |
b4b3ab14 | 458 | } |
f16f509d FZ |
459 | if (header.capacity == 0 && header.desc_offset) { |
460 | return vmdk_open_desc_file(bs, flags, header.desc_offset << 9); | |
461 | } | |
65bd155c KW |
462 | |
463 | if (le64_to_cpu(header.gd_offset) == VMDK4_GD_AT_END) { | |
464 | /* | |
465 | * The footer takes precedence over the header, so read it in. The | |
466 | * footer starts at offset -1024 from the end: One sector for the | |
467 | * footer, and another one for the end-of-stream marker. | |
468 | */ | |
469 | struct { | |
470 | struct { | |
471 | uint64_t val; | |
472 | uint32_t size; | |
473 | uint32_t type; | |
474 | uint8_t pad[512 - 16]; | |
475 | } QEMU_PACKED footer_marker; | |
476 | ||
477 | uint32_t magic; | |
478 | VMDK4Header header; | |
479 | uint8_t pad[512 - 4 - sizeof(VMDK4Header)]; | |
480 | ||
481 | struct { | |
482 | uint64_t val; | |
483 | uint32_t size; | |
484 | uint32_t type; | |
485 | uint8_t pad[512 - 16]; | |
486 | } QEMU_PACKED eos_marker; | |
487 | } QEMU_PACKED footer; | |
488 | ||
489 | ret = bdrv_pread(file, | |
490 | bs->file->total_sectors * 512 - 1536, | |
491 | &footer, sizeof(footer)); | |
492 | if (ret < 0) { | |
493 | return ret; | |
494 | } | |
495 | ||
496 | /* Some sanity checks for the footer */ | |
497 | if (be32_to_cpu(footer.magic) != VMDK4_MAGIC || | |
498 | le32_to_cpu(footer.footer_marker.size) != 0 || | |
499 | le32_to_cpu(footer.footer_marker.type) != MARKER_FOOTER || | |
500 | le64_to_cpu(footer.eos_marker.val) != 0 || | |
501 | le32_to_cpu(footer.eos_marker.size) != 0 || | |
502 | le32_to_cpu(footer.eos_marker.type) != MARKER_END_OF_STREAM) | |
503 | { | |
504 | return -EINVAL; | |
505 | } | |
506 | ||
507 | header = footer.header; | |
508 | } | |
509 | ||
b4b3ab14 FZ |
510 | l1_entry_sectors = le32_to_cpu(header.num_gtes_per_gte) |
511 | * le64_to_cpu(header.granularity); | |
75d12341 | 512 | if (l1_entry_sectors == 0) { |
86c6b429 FZ |
513 | return -EINVAL; |
514 | } | |
b4b3ab14 FZ |
515 | l1_size = (le64_to_cpu(header.capacity) + l1_entry_sectors - 1) |
516 | / l1_entry_sectors; | |
bb45ded9 FZ |
517 | if (le32_to_cpu(header.flags) & VMDK4_FLAG_RGD) { |
518 | l1_backup_offset = le64_to_cpu(header.rgd_offset) << 9; | |
519 | } | |
86c6b429 | 520 | extent = vmdk_add_extent(bs, file, false, |
b4b3ab14 FZ |
521 | le64_to_cpu(header.capacity), |
522 | le64_to_cpu(header.gd_offset) << 9, | |
bb45ded9 | 523 | l1_backup_offset, |
b4b3ab14 FZ |
524 | l1_size, |
525 | le32_to_cpu(header.num_gtes_per_gte), | |
526 | le64_to_cpu(header.granularity)); | |
432bb170 FZ |
527 | extent->compressed = |
528 | le16_to_cpu(header.compressAlgorithm) == VMDK4_COMPRESSION_DEFLATE; | |
529 | extent->has_marker = le32_to_cpu(header.flags) & VMDK4_FLAG_MARKER; | |
b4b3ab14 FZ |
530 | ret = vmdk_init_tables(bs, extent); |
531 | if (ret) { | |
86c6b429 FZ |
532 | /* free extent allocated by vmdk_add_extent */ |
533 | vmdk_free_last_extent(bs); | |
b4b3ab14 | 534 | } |
b4b3ab14 FZ |
535 | return ret; |
536 | } | |
537 | ||
7fa60fa3 FZ |
538 | /* find an option value out of descriptor file */ |
539 | static int vmdk_parse_description(const char *desc, const char *opt_name, | |
540 | char *buf, int buf_size) | |
541 | { | |
542 | char *opt_pos, *opt_end; | |
543 | const char *end = desc + strlen(desc); | |
544 | ||
545 | opt_pos = strstr(desc, opt_name); | |
546 | if (!opt_pos) { | |
547 | return -1; | |
548 | } | |
549 | /* Skip "=\"" following opt_name */ | |
550 | opt_pos += strlen(opt_name) + 2; | |
551 | if (opt_pos >= end) { | |
552 | return -1; | |
553 | } | |
554 | opt_end = opt_pos; | |
555 | while (opt_end < end && *opt_end != '"') { | |
556 | opt_end++; | |
557 | } | |
558 | if (opt_end == end || buf_size < opt_end - opt_pos + 1) { | |
559 | return -1; | |
560 | } | |
561 | pstrcpy(buf, opt_end - opt_pos + 1, opt_pos); | |
562 | return 0; | |
563 | } | |
564 | ||
86c6b429 FZ |
565 | /* Open an extent file and append to bs array */ |
566 | static int vmdk_open_sparse(BlockDriverState *bs, | |
567 | BlockDriverState *file, | |
568 | int flags) | |
569 | { | |
570 | uint32_t magic; | |
571 | ||
572 | if (bdrv_pread(file, 0, &magic, sizeof(magic)) != sizeof(magic)) { | |
573 | return -EIO; | |
574 | } | |
575 | ||
576 | magic = be32_to_cpu(magic); | |
577 | switch (magic) { | |
578 | case VMDK3_MAGIC: | |
579 | return vmdk_open_vmdk3(bs, file, flags); | |
580 | break; | |
581 | case VMDK4_MAGIC: | |
582 | return vmdk_open_vmdk4(bs, file, flags); | |
583 | break; | |
584 | default: | |
585 | return -EINVAL; | |
586 | break; | |
587 | } | |
588 | } | |
589 | ||
7fa60fa3 FZ |
590 | static int vmdk_parse_extents(const char *desc, BlockDriverState *bs, |
591 | const char *desc_file_path) | |
592 | { | |
593 | int ret; | |
594 | char access[11]; | |
595 | char type[11]; | |
596 | char fname[512]; | |
597 | const char *p = desc; | |
598 | int64_t sectors = 0; | |
599 | int64_t flat_offset; | |
86c6b429 FZ |
600 | char extent_path[PATH_MAX]; |
601 | BlockDriverState *extent_file; | |
7fa60fa3 FZ |
602 | |
603 | while (*p) { | |
604 | /* parse extent line: | |
605 | * RW [size in sectors] FLAT "file-name.vmdk" OFFSET | |
606 | * or | |
607 | * RW [size in sectors] SPARSE "file-name.vmdk" | |
608 | */ | |
609 | flat_offset = -1; | |
610 | ret = sscanf(p, "%10s %" SCNd64 " %10s %511s %" SCNd64, | |
611 | access, §ors, type, fname, &flat_offset); | |
612 | if (ret < 4 || strcmp(access, "RW")) { | |
613 | goto next_line; | |
614 | } else if (!strcmp(type, "FLAT")) { | |
615 | if (ret != 5 || flat_offset < 0) { | |
616 | return -EINVAL; | |
617 | } | |
618 | } else if (ret != 4) { | |
619 | return -EINVAL; | |
620 | } | |
621 | ||
622 | /* trim the quotation marks around */ | |
623 | if (fname[0] == '"') { | |
624 | memmove(fname, fname + 1, strlen(fname)); | |
625 | if (strlen(fname) <= 1 || fname[strlen(fname) - 1] != '"') { | |
626 | return -EINVAL; | |
627 | } | |
628 | fname[strlen(fname) - 1] = '\0'; | |
629 | } | |
630 | if (sectors <= 0 || | |
631 | (strcmp(type, "FLAT") && strcmp(type, "SPARSE")) || | |
632 | (strcmp(access, "RW"))) { | |
633 | goto next_line; | |
634 | } | |
635 | ||
86c6b429 FZ |
636 | path_combine(extent_path, sizeof(extent_path), |
637 | desc_file_path, fname); | |
638 | ret = bdrv_file_open(&extent_file, extent_path, bs->open_flags); | |
639 | if (ret) { | |
640 | return ret; | |
641 | } | |
642 | ||
7fa60fa3 FZ |
643 | /* save to extents array */ |
644 | if (!strcmp(type, "FLAT")) { | |
645 | /* FLAT extent */ | |
7fa60fa3 FZ |
646 | VmdkExtent *extent; |
647 | ||
7fa60fa3 FZ |
648 | extent = vmdk_add_extent(bs, extent_file, true, sectors, |
649 | 0, 0, 0, 0, sectors); | |
f16f509d | 650 | extent->flat_start_offset = flat_offset << 9; |
86c6b429 FZ |
651 | } else if (!strcmp(type, "SPARSE")) { |
652 | /* SPARSE extent */ | |
653 | ret = vmdk_open_sparse(bs, extent_file, bs->open_flags); | |
654 | if (ret) { | |
655 | bdrv_delete(extent_file); | |
656 | return ret; | |
657 | } | |
7fa60fa3 | 658 | } else { |
7fa60fa3 FZ |
659 | fprintf(stderr, |
660 | "VMDK: Not supported extent type \"%s\""".\n", type); | |
661 | return -ENOTSUP; | |
662 | } | |
663 | next_line: | |
664 | /* move to next line */ | |
665 | while (*p && *p != '\n') { | |
666 | p++; | |
667 | } | |
668 | p++; | |
669 | } | |
670 | return 0; | |
671 | } | |
672 | ||
f16f509d FZ |
673 | static int vmdk_open_desc_file(BlockDriverState *bs, int flags, |
674 | int64_t desc_offset) | |
7fa60fa3 FZ |
675 | { |
676 | int ret; | |
677 | char buf[2048]; | |
678 | char ct[128]; | |
679 | BDRVVmdkState *s = bs->opaque; | |
680 | ||
f16f509d | 681 | ret = bdrv_pread(bs->file, desc_offset, buf, sizeof(buf)); |
7fa60fa3 FZ |
682 | if (ret < 0) { |
683 | return ret; | |
684 | } | |
685 | buf[2047] = '\0'; | |
686 | if (vmdk_parse_description(buf, "createType", ct, sizeof(ct))) { | |
687 | return -EINVAL; | |
688 | } | |
6398de51 | 689 | if (strcmp(ct, "monolithicFlat") && |
86c6b429 | 690 | strcmp(ct, "twoGbMaxExtentSparse") && |
6398de51 | 691 | strcmp(ct, "twoGbMaxExtentFlat")) { |
7fa60fa3 FZ |
692 | fprintf(stderr, |
693 | "VMDK: Not supported image type \"%s\""".\n", ct); | |
694 | return -ENOTSUP; | |
695 | } | |
696 | s->desc_offset = 0; | |
bae0a0cc | 697 | return vmdk_parse_extents(buf, bs, bs->file->filename); |
7fa60fa3 FZ |
698 | } |
699 | ||
b4b3ab14 FZ |
700 | static int vmdk_open(BlockDriverState *bs, int flags) |
701 | { | |
86c6b429 FZ |
702 | int ret; |
703 | BDRVVmdkState *s = bs->opaque; | |
b4b3ab14 | 704 | |
86c6b429 FZ |
705 | if (vmdk_open_sparse(bs, bs->file, flags) == 0) { |
706 | s->desc_offset = 0x200; | |
bae0a0cc PB |
707 | } else { |
708 | ret = vmdk_open_desc_file(bs, flags, 0); | |
86c6b429 | 709 | if (ret) { |
bae0a0cc | 710 | goto fail; |
86c6b429 | 711 | } |
b4b3ab14 | 712 | } |
bae0a0cc PB |
713 | /* try to open parent images, if exist */ |
714 | ret = vmdk_parent_open(bs); | |
715 | if (ret) { | |
716 | goto fail; | |
717 | } | |
718 | s->parent_cid = vmdk_read_cid(bs, 1); | |
848c66e8 | 719 | qemu_co_mutex_init(&s->lock); |
2bc3166c KW |
720 | |
721 | /* Disable migration when VMDK images are used */ | |
722 | error_set(&s->migration_blocker, | |
723 | QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED, | |
724 | "vmdk", bs->device_name, "live migration"); | |
725 | migrate_add_blocker(s->migration_blocker); | |
726 | ||
727 | return 0; | |
bae0a0cc PB |
728 | |
729 | fail: | |
730 | vmdk_free_extents(bs); | |
731 | return ret; | |
ea2384d3 FB |
732 | } |
733 | ||
b3976d3c FZ |
734 | static int get_whole_cluster(BlockDriverState *bs, |
735 | VmdkExtent *extent, | |
736 | uint64_t cluster_offset, | |
737 | uint64_t offset, | |
738 | bool allocate) | |
5f4da8c0 | 739 | { |
b3976d3c FZ |
740 | /* 128 sectors * 512 bytes each = grain size 64KB */ |
741 | uint8_t whole_grain[extent->cluster_sectors * 512]; | |
5f4da8c0 | 742 | |
0e69c543 FZ |
743 | /* we will be here if it's first write on non-exist grain(cluster). |
744 | * try to read from parent image, if exist */ | |
b171271a | 745 | if (bs->backing_hd) { |
c336500d | 746 | int ret; |
5f4da8c0 | 747 | |
ae261c86 | 748 | if (!vmdk_is_cid_valid(bs)) { |
5f4da8c0 | 749 | return -1; |
ae261c86 | 750 | } |
5f4da8c0 | 751 | |
0e69c543 FZ |
752 | /* floor offset to cluster */ |
753 | offset -= offset % (extent->cluster_sectors * 512); | |
c336500d | 754 | ret = bdrv_read(bs->backing_hd, offset >> 9, whole_grain, |
b3976d3c | 755 | extent->cluster_sectors); |
c336500d KW |
756 | if (ret < 0) { |
757 | return -1; | |
758 | } | |
630530a6 | 759 | |
0e69c543 | 760 | /* Write grain only into the active image */ |
b3976d3c FZ |
761 | ret = bdrv_write(extent->file, cluster_offset, whole_grain, |
762 | extent->cluster_sectors); | |
c336500d KW |
763 | if (ret < 0) { |
764 | return -1; | |
630530a6 TS |
765 | } |
766 | } | |
767 | return 0; | |
768 | } | |
769 | ||
b3976d3c | 770 | static int vmdk_L2update(VmdkExtent *extent, VmdkMetaData *m_data) |
630530a6 | 771 | { |
630530a6 | 772 | /* update L2 table */ |
b3976d3c FZ |
773 | if (bdrv_pwrite_sync( |
774 | extent->file, | |
775 | ((int64_t)m_data->l2_offset * 512) | |
776 | + (m_data->l2_index * sizeof(m_data->offset)), | |
777 | &(m_data->offset), | |
778 | sizeof(m_data->offset) | |
779 | ) < 0) { | |
630530a6 | 780 | return -1; |
b3976d3c | 781 | } |
630530a6 | 782 | /* update backup L2 table */ |
b3976d3c FZ |
783 | if (extent->l1_backup_table_offset != 0) { |
784 | m_data->l2_offset = extent->l1_backup_table[m_data->l1_index]; | |
785 | if (bdrv_pwrite_sync( | |
786 | extent->file, | |
787 | ((int64_t)m_data->l2_offset * 512) | |
788 | + (m_data->l2_index * sizeof(m_data->offset)), | |
789 | &(m_data->offset), sizeof(m_data->offset) | |
790 | ) < 0) { | |
5f4da8c0 | 791 | return -1; |
b3976d3c | 792 | } |
5f4da8c0 | 793 | } |
630530a6 | 794 | |
5f4da8c0 TS |
795 | return 0; |
796 | } | |
797 | ||
91b85bd3 | 798 | static int get_cluster_offset(BlockDriverState *bs, |
b3976d3c FZ |
799 | VmdkExtent *extent, |
800 | VmdkMetaData *m_data, | |
91b85bd3 FZ |
801 | uint64_t offset, |
802 | int allocate, | |
803 | uint64_t *cluster_offset) | |
ea2384d3 | 804 | { |
ea2384d3 FB |
805 | unsigned int l1_index, l2_offset, l2_index; |
806 | int min_index, i, j; | |
630530a6 | 807 | uint32_t min_count, *l2_table, tmp = 0; |
630530a6 | 808 | |
ae261c86 | 809 | if (m_data) { |
630530a6 | 810 | m_data->valid = 0; |
ae261c86 | 811 | } |
91b85bd3 | 812 | if (extent->flat) { |
7fa60fa3 | 813 | *cluster_offset = extent->flat_start_offset; |
91b85bd3 FZ |
814 | return 0; |
815 | } | |
630530a6 | 816 | |
6398de51 | 817 | offset -= (extent->end_sector - extent->sectors) * SECTOR_SIZE; |
b3976d3c FZ |
818 | l1_index = (offset >> 9) / extent->l1_entry_sectors; |
819 | if (l1_index >= extent->l1_size) { | |
91b85bd3 | 820 | return -1; |
b3976d3c FZ |
821 | } |
822 | l2_offset = extent->l1_table[l1_index]; | |
823 | if (!l2_offset) { | |
91b85bd3 | 824 | return -1; |
b3976d3c | 825 | } |
b4b3ab14 | 826 | for (i = 0; i < L2_CACHE_SIZE; i++) { |
b3976d3c | 827 | if (l2_offset == extent->l2_cache_offsets[i]) { |
ea2384d3 | 828 | /* increment the hit count */ |
b3976d3c | 829 | if (++extent->l2_cache_counts[i] == 0xffffffff) { |
b4b3ab14 | 830 | for (j = 0; j < L2_CACHE_SIZE; j++) { |
b3976d3c | 831 | extent->l2_cache_counts[j] >>= 1; |
ea2384d3 FB |
832 | } |
833 | } | |
b3976d3c | 834 | l2_table = extent->l2_cache + (i * extent->l2_size); |
ea2384d3 FB |
835 | goto found; |
836 | } | |
837 | } | |
838 | /* not found: load a new entry in the least used one */ | |
839 | min_index = 0; | |
840 | min_count = 0xffffffff; | |
b4b3ab14 | 841 | for (i = 0; i < L2_CACHE_SIZE; i++) { |
b3976d3c FZ |
842 | if (extent->l2_cache_counts[i] < min_count) { |
843 | min_count = extent->l2_cache_counts[i]; | |
ea2384d3 FB |
844 | min_index = i; |
845 | } | |
846 | } | |
b3976d3c FZ |
847 | l2_table = extent->l2_cache + (min_index * extent->l2_size); |
848 | if (bdrv_pread( | |
849 | extent->file, | |
850 | (int64_t)l2_offset * 512, | |
851 | l2_table, | |
852 | extent->l2_size * sizeof(uint32_t) | |
853 | ) != extent->l2_size * sizeof(uint32_t)) { | |
91b85bd3 | 854 | return -1; |
b3976d3c | 855 | } |
5f4da8c0 | 856 | |
b3976d3c FZ |
857 | extent->l2_cache_offsets[min_index] = l2_offset; |
858 | extent->l2_cache_counts[min_index] = 1; | |
ea2384d3 | 859 | found: |
b3976d3c | 860 | l2_index = ((offset >> 9) / extent->cluster_sectors) % extent->l2_size; |
91b85bd3 | 861 | *cluster_offset = le32_to_cpu(l2_table[l2_index]); |
630530a6 | 862 | |
91b85bd3 FZ |
863 | if (!*cluster_offset) { |
864 | if (!allocate) { | |
865 | return -1; | |
866 | } | |
9949f97e | 867 | |
ae261c86 | 868 | /* Avoid the L2 tables update for the images that have snapshots. */ |
91b85bd3 | 869 | *cluster_offset = bdrv_getlength(extent->file); |
2b2c8c5d FZ |
870 | if (!extent->compressed) { |
871 | bdrv_truncate( | |
872 | extent->file, | |
873 | *cluster_offset + (extent->cluster_sectors << 9) | |
874 | ); | |
875 | } | |
9949f97e | 876 | |
91b85bd3 FZ |
877 | *cluster_offset >>= 9; |
878 | tmp = cpu_to_le32(*cluster_offset); | |
9949f97e | 879 | l2_table[l2_index] = tmp; |
630530a6 | 880 | |
630530a6 TS |
881 | /* First of all we write grain itself, to avoid race condition |
882 | * that may to corrupt the image. | |
883 | * This problem may occur because of insufficient space on host disk | |
884 | * or inappropriate VM shutdown. | |
885 | */ | |
b3976d3c | 886 | if (get_whole_cluster( |
ae261c86 | 887 | bs, extent, *cluster_offset, offset, allocate) == -1) { |
91b85bd3 | 888 | return -1; |
ae261c86 | 889 | } |
630530a6 TS |
890 | |
891 | if (m_data) { | |
892 | m_data->offset = tmp; | |
893 | m_data->l1_index = l1_index; | |
894 | m_data->l2_index = l2_index; | |
895 | m_data->l2_offset = l2_offset; | |
896 | m_data->valid = 1; | |
897 | } | |
ff1afc72 | 898 | } |
91b85bd3 FZ |
899 | *cluster_offset <<= 9; |
900 | return 0; | |
ea2384d3 FB |
901 | } |
902 | ||
b3976d3c FZ |
903 | static VmdkExtent *find_extent(BDRVVmdkState *s, |
904 | int64_t sector_num, VmdkExtent *start_hint) | |
905 | { | |
906 | VmdkExtent *extent = start_hint; | |
907 | ||
908 | if (!extent) { | |
909 | extent = &s->extents[0]; | |
910 | } | |
911 | while (extent < &s->extents[s->num_extents]) { | |
912 | if (sector_num < extent->end_sector) { | |
913 | return extent; | |
914 | } | |
915 | extent++; | |
916 | } | |
917 | return NULL; | |
918 | } | |
919 | ||
f8a2e5e3 SH |
920 | static int coroutine_fn vmdk_co_is_allocated(BlockDriverState *bs, |
921 | int64_t sector_num, int nb_sectors, int *pnum) | |
ea2384d3 FB |
922 | { |
923 | BDRVVmdkState *s = bs->opaque; | |
b3976d3c FZ |
924 | int64_t index_in_cluster, n, ret; |
925 | uint64_t offset; | |
926 | VmdkExtent *extent; | |
927 | ||
928 | extent = find_extent(s, sector_num, NULL); | |
929 | if (!extent) { | |
930 | return 0; | |
931 | } | |
f8a2e5e3 | 932 | qemu_co_mutex_lock(&s->lock); |
91b85bd3 FZ |
933 | ret = get_cluster_offset(bs, extent, NULL, |
934 | sector_num * 512, 0, &offset); | |
f8a2e5e3 | 935 | qemu_co_mutex_unlock(&s->lock); |
91b85bd3 FZ |
936 | /* get_cluster_offset returning 0 means success */ |
937 | ret = !ret; | |
938 | ||
939 | index_in_cluster = sector_num % extent->cluster_sectors; | |
940 | n = extent->cluster_sectors - index_in_cluster; | |
ae261c86 | 941 | if (n > nb_sectors) { |
ea2384d3 | 942 | n = nb_sectors; |
ae261c86 | 943 | } |
ea2384d3 | 944 | *pnum = n; |
b3976d3c | 945 | return ret; |
ea2384d3 FB |
946 | } |
947 | ||
dd3f6ee2 FZ |
948 | static int vmdk_write_extent(VmdkExtent *extent, int64_t cluster_offset, |
949 | int64_t offset_in_cluster, const uint8_t *buf, | |
950 | int nb_sectors, int64_t sector_num) | |
951 | { | |
952 | int ret; | |
2b2c8c5d FZ |
953 | VmdkGrainMarker *data = NULL; |
954 | uLongf buf_len; | |
dd3f6ee2 FZ |
955 | const uint8_t *write_buf = buf; |
956 | int write_len = nb_sectors * 512; | |
957 | ||
2b2c8c5d FZ |
958 | if (extent->compressed) { |
959 | if (!extent->has_marker) { | |
960 | ret = -EINVAL; | |
961 | goto out; | |
962 | } | |
963 | buf_len = (extent->cluster_sectors << 9) * 2; | |
964 | data = g_malloc(buf_len + sizeof(VmdkGrainMarker)); | |
965 | if (compress(data->data, &buf_len, buf, nb_sectors << 9) != Z_OK || | |
966 | buf_len == 0) { | |
967 | ret = -EINVAL; | |
968 | goto out; | |
969 | } | |
970 | data->lba = sector_num; | |
971 | data->size = buf_len; | |
972 | write_buf = (uint8_t *)data; | |
973 | write_len = buf_len + sizeof(VmdkGrainMarker); | |
974 | } | |
dd3f6ee2 FZ |
975 | ret = bdrv_pwrite(extent->file, |
976 | cluster_offset + offset_in_cluster, | |
977 | write_buf, | |
978 | write_len); | |
979 | if (ret != write_len) { | |
980 | ret = ret < 0 ? ret : -EIO; | |
981 | goto out; | |
982 | } | |
983 | ret = 0; | |
984 | out: | |
2b2c8c5d | 985 | g_free(data); |
dd3f6ee2 FZ |
986 | return ret; |
987 | } | |
988 | ||
989 | static int vmdk_read_extent(VmdkExtent *extent, int64_t cluster_offset, | |
990 | int64_t offset_in_cluster, uint8_t *buf, | |
991 | int nb_sectors) | |
992 | { | |
993 | int ret; | |
2b2c8c5d FZ |
994 | int cluster_bytes, buf_bytes; |
995 | uint8_t *cluster_buf, *compressed_data; | |
996 | uint8_t *uncomp_buf; | |
997 | uint32_t data_len; | |
998 | VmdkGrainMarker *marker; | |
999 | uLongf buf_len; | |
1000 | ||
dd3f6ee2 | 1001 | |
2b2c8c5d FZ |
1002 | if (!extent->compressed) { |
1003 | ret = bdrv_pread(extent->file, | |
1004 | cluster_offset + offset_in_cluster, | |
1005 | buf, nb_sectors * 512); | |
1006 | if (ret == nb_sectors * 512) { | |
1007 | return 0; | |
1008 | } else { | |
1009 | return -EIO; | |
1010 | } | |
1011 | } | |
1012 | cluster_bytes = extent->cluster_sectors * 512; | |
1013 | /* Read two clusters in case GrainMarker + compressed data > one cluster */ | |
1014 | buf_bytes = cluster_bytes * 2; | |
1015 | cluster_buf = g_malloc(buf_bytes); | |
1016 | uncomp_buf = g_malloc(cluster_bytes); | |
dd3f6ee2 | 1017 | ret = bdrv_pread(extent->file, |
2b2c8c5d FZ |
1018 | cluster_offset, |
1019 | cluster_buf, buf_bytes); | |
1020 | if (ret < 0) { | |
1021 | goto out; | |
1022 | } | |
1023 | compressed_data = cluster_buf; | |
1024 | buf_len = cluster_bytes; | |
1025 | data_len = cluster_bytes; | |
1026 | if (extent->has_marker) { | |
1027 | marker = (VmdkGrainMarker *)cluster_buf; | |
1028 | compressed_data = marker->data; | |
1029 | data_len = le32_to_cpu(marker->size); | |
1030 | } | |
1031 | if (!data_len || data_len > buf_bytes) { | |
1032 | ret = -EINVAL; | |
1033 | goto out; | |
1034 | } | |
1035 | ret = uncompress(uncomp_buf, &buf_len, compressed_data, data_len); | |
1036 | if (ret != Z_OK) { | |
1037 | ret = -EINVAL; | |
1038 | goto out; | |
1039 | ||
1040 | } | |
1041 | if (offset_in_cluster < 0 || | |
1042 | offset_in_cluster + nb_sectors * 512 > buf_len) { | |
1043 | ret = -EINVAL; | |
1044 | goto out; | |
dd3f6ee2 | 1045 | } |
2b2c8c5d FZ |
1046 | memcpy(buf, uncomp_buf + offset_in_cluster, nb_sectors * 512); |
1047 | ret = 0; | |
1048 | ||
1049 | out: | |
1050 | g_free(uncomp_buf); | |
1051 | g_free(cluster_buf); | |
1052 | return ret; | |
dd3f6ee2 FZ |
1053 | } |
1054 | ||
5fafdf24 | 1055 | static int vmdk_read(BlockDriverState *bs, int64_t sector_num, |
ea2384d3 FB |
1056 | uint8_t *buf, int nb_sectors) |
1057 | { | |
1058 | BDRVVmdkState *s = bs->opaque; | |
b3976d3c FZ |
1059 | int ret; |
1060 | uint64_t n, index_in_cluster; | |
1061 | VmdkExtent *extent = NULL; | |
ea2384d3 | 1062 | uint64_t cluster_offset; |
5f4da8c0 | 1063 | |
ea2384d3 | 1064 | while (nb_sectors > 0) { |
b3976d3c FZ |
1065 | extent = find_extent(s, sector_num, extent); |
1066 | if (!extent) { | |
1067 | return -EIO; | |
1068 | } | |
91b85bd3 FZ |
1069 | ret = get_cluster_offset( |
1070 | bs, extent, NULL, | |
1071 | sector_num << 9, 0, &cluster_offset); | |
b3976d3c FZ |
1072 | index_in_cluster = sector_num % extent->cluster_sectors; |
1073 | n = extent->cluster_sectors - index_in_cluster; | |
ae261c86 | 1074 | if (n > nb_sectors) { |
ea2384d3 | 1075 | n = nb_sectors; |
ae261c86 | 1076 | } |
91b85bd3 FZ |
1077 | if (ret) { |
1078 | /* if not allocated, try to read from parent image, if exist */ | |
b171271a | 1079 | if (bs->backing_hd) { |
ae261c86 | 1080 | if (!vmdk_is_cid_valid(bs)) { |
7fa60fa3 | 1081 | return -EINVAL; |
ae261c86 | 1082 | } |
b171271a | 1083 | ret = bdrv_read(bs->backing_hd, sector_num, buf, n); |
ae261c86 | 1084 | if (ret < 0) { |
7fa60fa3 | 1085 | return ret; |
ae261c86 | 1086 | } |
5f4da8c0 TS |
1087 | } else { |
1088 | memset(buf, 0, 512 * n); | |
1089 | } | |
ea2384d3 | 1090 | } else { |
dd3f6ee2 FZ |
1091 | ret = vmdk_read_extent(extent, |
1092 | cluster_offset, index_in_cluster * 512, | |
1093 | buf, n); | |
1094 | if (ret) { | |
7fa60fa3 FZ |
1095 | return ret; |
1096 | } | |
ea2384d3 FB |
1097 | } |
1098 | nb_sectors -= n; | |
1099 | sector_num += n; | |
1100 | buf += n * 512; | |
1101 | } | |
1102 | return 0; | |
1103 | } | |
1104 | ||
2914caa0 PB |
1105 | static coroutine_fn int vmdk_co_read(BlockDriverState *bs, int64_t sector_num, |
1106 | uint8_t *buf, int nb_sectors) | |
1107 | { | |
1108 | int ret; | |
1109 | BDRVVmdkState *s = bs->opaque; | |
1110 | qemu_co_mutex_lock(&s->lock); | |
1111 | ret = vmdk_read(bs, sector_num, buf, nb_sectors); | |
1112 | qemu_co_mutex_unlock(&s->lock); | |
1113 | return ret; | |
1114 | } | |
1115 | ||
5fafdf24 | 1116 | static int vmdk_write(BlockDriverState *bs, int64_t sector_num, |
ea2384d3 FB |
1117 | const uint8_t *buf, int nb_sectors) |
1118 | { | |
ff1afc72 | 1119 | BDRVVmdkState *s = bs->opaque; |
b3976d3c | 1120 | VmdkExtent *extent = NULL; |
91b85bd3 | 1121 | int n, ret; |
b3976d3c | 1122 | int64_t index_in_cluster; |
ff1afc72 | 1123 | uint64_t cluster_offset; |
b3976d3c | 1124 | VmdkMetaData m_data; |
ff1afc72 | 1125 | |
630530a6 TS |
1126 | if (sector_num > bs->total_sectors) { |
1127 | fprintf(stderr, | |
92868412 JM |
1128 | "(VMDK) Wrong offset: sector_num=0x%" PRIx64 |
1129 | " total_sectors=0x%" PRIx64 "\n", | |
630530a6 | 1130 | sector_num, bs->total_sectors); |
7fa60fa3 | 1131 | return -EIO; |
630530a6 TS |
1132 | } |
1133 | ||
ff1afc72 | 1134 | while (nb_sectors > 0) { |
b3976d3c FZ |
1135 | extent = find_extent(s, sector_num, extent); |
1136 | if (!extent) { | |
1137 | return -EIO; | |
1138 | } | |
91b85bd3 | 1139 | ret = get_cluster_offset( |
b3976d3c FZ |
1140 | bs, |
1141 | extent, | |
1142 | &m_data, | |
2b2c8c5d | 1143 | sector_num << 9, !extent->compressed, |
91b85bd3 | 1144 | &cluster_offset); |
2b2c8c5d FZ |
1145 | if (extent->compressed) { |
1146 | if (ret == 0) { | |
1147 | /* Refuse write to allocated cluster for streamOptimized */ | |
1148 | fprintf(stderr, | |
1149 | "VMDK: can't write to allocated cluster" | |
1150 | " for streamOptimized\n"); | |
1151 | return -EIO; | |
1152 | } else { | |
1153 | /* allocate */ | |
1154 | ret = get_cluster_offset( | |
1155 | bs, | |
1156 | extent, | |
1157 | &m_data, | |
1158 | sector_num << 9, 1, | |
1159 | &cluster_offset); | |
1160 | } | |
1161 | } | |
91b85bd3 FZ |
1162 | if (ret) { |
1163 | return -EINVAL; | |
b3976d3c FZ |
1164 | } |
1165 | index_in_cluster = sector_num % extent->cluster_sectors; | |
1166 | n = extent->cluster_sectors - index_in_cluster; | |
1167 | if (n > nb_sectors) { | |
1168 | n = nb_sectors; | |
1169 | } | |
630530a6 | 1170 | |
dd3f6ee2 FZ |
1171 | ret = vmdk_write_extent(extent, |
1172 | cluster_offset, index_in_cluster * 512, | |
1173 | buf, n, sector_num); | |
1174 | if (ret) { | |
7fa60fa3 | 1175 | return ret; |
b3976d3c | 1176 | } |
630530a6 TS |
1177 | if (m_data.valid) { |
1178 | /* update L2 tables */ | |
b3976d3c | 1179 | if (vmdk_L2update(extent, &m_data) == -1) { |
7fa60fa3 | 1180 | return -EIO; |
b3976d3c | 1181 | } |
630530a6 | 1182 | } |
ff1afc72 FB |
1183 | nb_sectors -= n; |
1184 | sector_num += n; | |
1185 | buf += n * 512; | |
5f4da8c0 | 1186 | |
ae261c86 FZ |
1187 | /* update CID on the first write every time the virtual disk is |
1188 | * opened */ | |
69b4d86d | 1189 | if (!s->cid_updated) { |
99f1835d KW |
1190 | ret = vmdk_write_cid(bs, time(NULL)); |
1191 | if (ret < 0) { | |
1192 | return ret; | |
1193 | } | |
69b4d86d | 1194 | s->cid_updated = true; |
5f4da8c0 | 1195 | } |
ff1afc72 FB |
1196 | } |
1197 | return 0; | |
ea2384d3 FB |
1198 | } |
1199 | ||
e183ef75 PB |
1200 | static coroutine_fn int vmdk_co_write(BlockDriverState *bs, int64_t sector_num, |
1201 | const uint8_t *buf, int nb_sectors) | |
1202 | { | |
1203 | int ret; | |
1204 | BDRVVmdkState *s = bs->opaque; | |
1205 | qemu_co_mutex_lock(&s->lock); | |
1206 | ret = vmdk_write(bs, sector_num, buf, nb_sectors); | |
1207 | qemu_co_mutex_unlock(&s->lock); | |
1208 | return ret; | |
1209 | } | |
1210 | ||
f66fd6c3 | 1211 | |
6c031aac FZ |
1212 | static int vmdk_create_extent(const char *filename, int64_t filesize, |
1213 | bool flat, bool compress) | |
8979b227 | 1214 | { |
f66fd6c3 FZ |
1215 | int ret, i; |
1216 | int fd = 0; | |
8979b227 FB |
1217 | VMDK4Header header; |
1218 | uint32_t tmp, magic, grains, gd_size, gt_size, gt_count; | |
0e7e1989 | 1219 | |
6165f4d8 CB |
1220 | fd = qemu_open(filename, |
1221 | O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE, | |
1222 | 0644); | |
f66fd6c3 FZ |
1223 | if (fd < 0) { |
1224 | return -errno; | |
0e7e1989 | 1225 | } |
f66fd6c3 FZ |
1226 | if (flat) { |
1227 | ret = ftruncate(fd, filesize); | |
1228 | if (ret < 0) { | |
1229 | ret = -errno; | |
1230 | } | |
1231 | goto exit; | |
5f4da8c0 | 1232 | } |
8979b227 FB |
1233 | magic = cpu_to_be32(VMDK4_MAGIC); |
1234 | memset(&header, 0, sizeof(header)); | |
16372ff0 | 1235 | header.version = 1; |
6c031aac FZ |
1236 | header.flags = |
1237 | 3 | (compress ? VMDK4_FLAG_COMPRESS | VMDK4_FLAG_MARKER : 0); | |
1238 | header.compressAlgorithm = compress ? VMDK4_COMPRESSION_DEFLATE : 0; | |
f66fd6c3 | 1239 | header.capacity = filesize / 512; |
16372ff0 AG |
1240 | header.granularity = 128; |
1241 | header.num_gtes_per_gte = 512; | |
8979b227 | 1242 | |
f66fd6c3 | 1243 | grains = (filesize / 512 + header.granularity - 1) / header.granularity; |
8979b227 | 1244 | gt_size = ((header.num_gtes_per_gte * sizeof(uint32_t)) + 511) >> 9; |
f66fd6c3 FZ |
1245 | gt_count = |
1246 | (grains + header.num_gtes_per_gte - 1) / header.num_gtes_per_gte; | |
8979b227 FB |
1247 | gd_size = (gt_count * sizeof(uint32_t) + 511) >> 9; |
1248 | ||
1249 | header.desc_offset = 1; | |
1250 | header.desc_size = 20; | |
1251 | header.rgd_offset = header.desc_offset + header.desc_size; | |
1252 | header.gd_offset = header.rgd_offset + gd_size + (gt_size * gt_count); | |
1253 | header.grain_offset = | |
1254 | ((header.gd_offset + gd_size + (gt_size * gt_count) + | |
1255 | header.granularity - 1) / header.granularity) * | |
1256 | header.granularity; | |
16372ff0 AG |
1257 | /* swap endianness for all header fields */ |
1258 | header.version = cpu_to_le32(header.version); | |
1259 | header.flags = cpu_to_le32(header.flags); | |
1260 | header.capacity = cpu_to_le64(header.capacity); | |
1261 | header.granularity = cpu_to_le64(header.granularity); | |
1262 | header.num_gtes_per_gte = cpu_to_le32(header.num_gtes_per_gte); | |
8979b227 FB |
1263 | header.desc_offset = cpu_to_le64(header.desc_offset); |
1264 | header.desc_size = cpu_to_le64(header.desc_size); | |
1265 | header.rgd_offset = cpu_to_le64(header.rgd_offset); | |
1266 | header.gd_offset = cpu_to_le64(header.gd_offset); | |
1267 | header.grain_offset = cpu_to_le64(header.grain_offset); | |
6c031aac | 1268 | header.compressAlgorithm = cpu_to_le16(header.compressAlgorithm); |
8979b227 FB |
1269 | |
1270 | header.check_bytes[0] = 0xa; | |
1271 | header.check_bytes[1] = 0x20; | |
1272 | header.check_bytes[2] = 0xd; | |
1273 | header.check_bytes[3] = 0xa; | |
3b46e624 TS |
1274 | |
1275 | /* write all the data */ | |
1640366c KS |
1276 | ret = qemu_write_full(fd, &magic, sizeof(magic)); |
1277 | if (ret != sizeof(magic)) { | |
b781cce5 | 1278 | ret = -errno; |
1640366c KS |
1279 | goto exit; |
1280 | } | |
1281 | ret = qemu_write_full(fd, &header, sizeof(header)); | |
1282 | if (ret != sizeof(header)) { | |
b781cce5 | 1283 | ret = -errno; |
1640366c KS |
1284 | goto exit; |
1285 | } | |
8979b227 | 1286 | |
16372ff0 | 1287 | ret = ftruncate(fd, le64_to_cpu(header.grain_offset) << 9); |
1640366c | 1288 | if (ret < 0) { |
b781cce5 | 1289 | ret = -errno; |
1640366c KS |
1290 | goto exit; |
1291 | } | |
8979b227 FB |
1292 | |
1293 | /* write grain directory */ | |
1294 | lseek(fd, le64_to_cpu(header.rgd_offset) << 9, SEEK_SET); | |
16372ff0 | 1295 | for (i = 0, tmp = le64_to_cpu(header.rgd_offset) + gd_size; |
1640366c KS |
1296 | i < gt_count; i++, tmp += gt_size) { |
1297 | ret = qemu_write_full(fd, &tmp, sizeof(tmp)); | |
1298 | if (ret != sizeof(tmp)) { | |
b781cce5 | 1299 | ret = -errno; |
1640366c KS |
1300 | goto exit; |
1301 | } | |
1302 | } | |
3b46e624 | 1303 | |
8979b227 FB |
1304 | /* write backup grain directory */ |
1305 | lseek(fd, le64_to_cpu(header.gd_offset) << 9, SEEK_SET); | |
16372ff0 | 1306 | for (i = 0, tmp = le64_to_cpu(header.gd_offset) + gd_size; |
1640366c KS |
1307 | i < gt_count; i++, tmp += gt_size) { |
1308 | ret = qemu_write_full(fd, &tmp, sizeof(tmp)); | |
1309 | if (ret != sizeof(tmp)) { | |
b781cce5 | 1310 | ret = -errno; |
1640366c KS |
1311 | goto exit; |
1312 | } | |
1313 | } | |
8979b227 | 1314 | |
f66fd6c3 FZ |
1315 | ret = 0; |
1316 | exit: | |
2e1e79da | 1317 | qemu_close(fd); |
f66fd6c3 FZ |
1318 | return ret; |
1319 | } | |
1320 | ||
1321 | static int filename_decompose(const char *filename, char *path, char *prefix, | |
1322 | char *postfix, size_t buf_len) | |
1323 | { | |
1324 | const char *p, *q; | |
1325 | ||
1326 | if (filename == NULL || !strlen(filename)) { | |
1327 | fprintf(stderr, "Vmdk: no filename provided.\n"); | |
1328 | return -1; | |
1329 | } | |
1330 | p = strrchr(filename, '/'); | |
1331 | if (p == NULL) { | |
1332 | p = strrchr(filename, '\\'); | |
1333 | } | |
1334 | if (p == NULL) { | |
1335 | p = strrchr(filename, ':'); | |
1336 | } | |
1337 | if (p != NULL) { | |
1338 | p++; | |
1339 | if (p - filename >= buf_len) { | |
1340 | return -1; | |
1341 | } | |
1342 | pstrcpy(path, p - filename + 1, filename); | |
1343 | } else { | |
1344 | p = filename; | |
1345 | path[0] = '\0'; | |
1346 | } | |
1347 | q = strrchr(p, '.'); | |
1348 | if (q == NULL) { | |
1349 | pstrcpy(prefix, buf_len, p); | |
1350 | postfix[0] = '\0'; | |
1351 | } else { | |
1352 | if (q - p >= buf_len) { | |
1353 | return -1; | |
1354 | } | |
1355 | pstrcpy(prefix, q - p + 1, p); | |
1356 | pstrcpy(postfix, buf_len, q); | |
1357 | } | |
1358 | return 0; | |
1359 | } | |
1360 | ||
1361 | static int relative_path(char *dest, int dest_size, | |
1362 | const char *base, const char *target) | |
1363 | { | |
1364 | int i = 0; | |
1365 | int n = 0; | |
1366 | const char *p, *q; | |
1367 | #ifdef _WIN32 | |
1368 | const char *sep = "\\"; | |
1369 | #else | |
1370 | const char *sep = "/"; | |
1371 | #endif | |
1372 | ||
1373 | if (!(dest && base && target)) { | |
1374 | return -1; | |
1375 | } | |
1376 | if (path_is_absolute(target)) { | |
1377 | dest[dest_size - 1] = '\0'; | |
1378 | strncpy(dest, target, dest_size - 1); | |
1379 | return 0; | |
1380 | } | |
1381 | while (base[i] == target[i]) { | |
1382 | i++; | |
1383 | } | |
1384 | p = &base[i]; | |
1385 | q = &target[i]; | |
1386 | while (*p) { | |
1387 | if (*p == *sep) { | |
1388 | n++; | |
1389 | } | |
1390 | p++; | |
1391 | } | |
1392 | dest[0] = '\0'; | |
1393 | for (; n; n--) { | |
1394 | pstrcat(dest, dest_size, ".."); | |
1395 | pstrcat(dest, dest_size, sep); | |
1396 | } | |
1397 | pstrcat(dest, dest_size, q); | |
1398 | return 0; | |
1399 | } | |
1400 | ||
1401 | static int vmdk_create(const char *filename, QEMUOptionParameter *options) | |
1402 | { | |
1403 | int fd, idx = 0; | |
1404 | char desc[BUF_SIZE]; | |
1405 | int64_t total_size = 0, filesize; | |
1406 | const char *backing_file = NULL; | |
1407 | const char *fmt = NULL; | |
1408 | int flags = 0; | |
1409 | int ret = 0; | |
6c031aac | 1410 | bool flat, split, compress; |
f66fd6c3 FZ |
1411 | char ext_desc_lines[BUF_SIZE] = ""; |
1412 | char path[PATH_MAX], prefix[PATH_MAX], postfix[PATH_MAX]; | |
1413 | const int64_t split_size = 0x80000000; /* VMDK has constant split size */ | |
1414 | const char *desc_extent_line; | |
1415 | char parent_desc_line[BUF_SIZE] = ""; | |
1416 | uint32_t parent_cid = 0xffffffff; | |
1417 | const char desc_template[] = | |
1418 | "# Disk DescriptorFile\n" | |
1419 | "version=1\n" | |
1420 | "CID=%x\n" | |
1421 | "parentCID=%x\n" | |
1422 | "createType=\"%s\"\n" | |
1423 | "%s" | |
1424 | "\n" | |
1425 | "# Extent description\n" | |
1426 | "%s" | |
1427 | "\n" | |
1428 | "# The Disk Data Base\n" | |
1429 | "#DDB\n" | |
1430 | "\n" | |
1431 | "ddb.virtualHWVersion = \"%d\"\n" | |
1432 | "ddb.geometry.cylinders = \"%" PRId64 "\"\n" | |
1433 | "ddb.geometry.heads = \"16\"\n" | |
1434 | "ddb.geometry.sectors = \"63\"\n" | |
1435 | "ddb.adapterType = \"ide\"\n"; | |
1436 | ||
1437 | if (filename_decompose(filename, path, prefix, postfix, PATH_MAX)) { | |
1438 | return -EINVAL; | |
1439 | } | |
1440 | /* Read out options */ | |
1441 | while (options && options->name) { | |
1442 | if (!strcmp(options->name, BLOCK_OPT_SIZE)) { | |
1443 | total_size = options->value.n; | |
1444 | } else if (!strcmp(options->name, BLOCK_OPT_BACKING_FILE)) { | |
1445 | backing_file = options->value.s; | |
1446 | } else if (!strcmp(options->name, BLOCK_OPT_COMPAT6)) { | |
1447 | flags |= options->value.n ? BLOCK_FLAG_COMPAT6 : 0; | |
1448 | } else if (!strcmp(options->name, BLOCK_OPT_SUBFMT)) { | |
1449 | fmt = options->value.s; | |
1450 | } | |
1451 | options++; | |
1452 | } | |
1453 | if (!fmt) { | |
1454 | /* Default format to monolithicSparse */ | |
1455 | fmt = "monolithicSparse"; | |
1456 | } else if (strcmp(fmt, "monolithicFlat") && | |
1457 | strcmp(fmt, "monolithicSparse") && | |
1458 | strcmp(fmt, "twoGbMaxExtentSparse") && | |
6c031aac FZ |
1459 | strcmp(fmt, "twoGbMaxExtentFlat") && |
1460 | strcmp(fmt, "streamOptimized")) { | |
f66fd6c3 FZ |
1461 | fprintf(stderr, "VMDK: Unknown subformat: %s\n", fmt); |
1462 | return -EINVAL; | |
1463 | } | |
1464 | split = !(strcmp(fmt, "twoGbMaxExtentFlat") && | |
1465 | strcmp(fmt, "twoGbMaxExtentSparse")); | |
1466 | flat = !(strcmp(fmt, "monolithicFlat") && | |
1467 | strcmp(fmt, "twoGbMaxExtentFlat")); | |
6c031aac | 1468 | compress = !strcmp(fmt, "streamOptimized"); |
f66fd6c3 FZ |
1469 | if (flat) { |
1470 | desc_extent_line = "RW %lld FLAT \"%s\" 0\n"; | |
1471 | } else { | |
1472 | desc_extent_line = "RW %lld SPARSE \"%s\"\n"; | |
1473 | } | |
1474 | if (flat && backing_file) { | |
1475 | /* not supporting backing file for flat image */ | |
1476 | return -ENOTSUP; | |
1477 | } | |
1478 | if (backing_file) { | |
1479 | char parent_filename[PATH_MAX]; | |
1480 | BlockDriverState *bs = bdrv_new(""); | |
1481 | ret = bdrv_open(bs, backing_file, 0, NULL); | |
1482 | if (ret != 0) { | |
1483 | bdrv_delete(bs); | |
1484 | return ret; | |
1485 | } | |
1486 | if (strcmp(bs->drv->format_name, "vmdk")) { | |
1487 | bdrv_delete(bs); | |
1488 | return -EINVAL; | |
1489 | } | |
f66fd6c3 FZ |
1490 | parent_cid = vmdk_read_cid(bs, 0); |
1491 | bdrv_delete(bs); | |
1492 | relative_path(parent_filename, sizeof(parent_filename), | |
1493 | filename, backing_file); | |
1494 | snprintf(parent_desc_line, sizeof(parent_desc_line), | |
1495 | "parentFileNameHint=\"%s\"", parent_filename); | |
1496 | } | |
1497 | ||
1498 | /* Create extents */ | |
1499 | filesize = total_size; | |
1500 | while (filesize > 0) { | |
1501 | char desc_line[BUF_SIZE]; | |
1502 | char ext_filename[PATH_MAX]; | |
1503 | char desc_filename[PATH_MAX]; | |
1504 | int64_t size = filesize; | |
1505 | ||
1506 | if (split && size > split_size) { | |
1507 | size = split_size; | |
1508 | } | |
1509 | if (split) { | |
1510 | snprintf(desc_filename, sizeof(desc_filename), "%s-%c%03d%s", | |
1511 | prefix, flat ? 'f' : 's', ++idx, postfix); | |
1512 | } else if (flat) { | |
1513 | snprintf(desc_filename, sizeof(desc_filename), "%s-flat%s", | |
1514 | prefix, postfix); | |
1515 | } else { | |
1516 | snprintf(desc_filename, sizeof(desc_filename), "%s%s", | |
1517 | prefix, postfix); | |
1518 | } | |
1519 | snprintf(ext_filename, sizeof(ext_filename), "%s%s", | |
1520 | path, desc_filename); | |
1521 | ||
6c031aac | 1522 | if (vmdk_create_extent(ext_filename, size, flat, compress)) { |
f66fd6c3 FZ |
1523 | return -EINVAL; |
1524 | } | |
1525 | filesize -= size; | |
1526 | ||
1527 | /* Format description line */ | |
1528 | snprintf(desc_line, sizeof(desc_line), | |
1529 | desc_extent_line, size / 512, desc_filename); | |
1530 | pstrcat(ext_desc_lines, sizeof(ext_desc_lines), desc_line); | |
1531 | } | |
1532 | /* generate descriptor file */ | |
1533 | snprintf(desc, sizeof(desc), desc_template, | |
1534 | (unsigned int)time(NULL), | |
1535 | parent_cid, | |
1536 | fmt, | |
1537 | parent_desc_line, | |
1538 | ext_desc_lines, | |
1539 | (flags & BLOCK_FLAG_COMPAT6 ? 6 : 4), | |
1540 | total_size / (int64_t)(63 * 16 * 512)); | |
1541 | if (split || flat) { | |
6165f4d8 CB |
1542 | fd = qemu_open(filename, |
1543 | O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE, | |
1544 | 0644); | |
f66fd6c3 | 1545 | } else { |
6165f4d8 CB |
1546 | fd = qemu_open(filename, |
1547 | O_WRONLY | O_BINARY | O_LARGEFILE, | |
1548 | 0644); | |
f66fd6c3 FZ |
1549 | } |
1550 | if (fd < 0) { | |
1551 | return -errno; | |
1552 | } | |
1553 | /* the descriptor offset = 0x200 */ | |
1554 | if (!split && !flat && 0x200 != lseek(fd, 0x200, SEEK_SET)) { | |
1555 | ret = -errno; | |
1556 | goto exit; | |
1557 | } | |
1640366c KS |
1558 | ret = qemu_write_full(fd, desc, strlen(desc)); |
1559 | if (ret != strlen(desc)) { | |
b781cce5 | 1560 | ret = -errno; |
1640366c KS |
1561 | goto exit; |
1562 | } | |
1640366c KS |
1563 | ret = 0; |
1564 | exit: | |
2e1e79da | 1565 | qemu_close(fd); |
1640366c | 1566 | return ret; |
8979b227 FB |
1567 | } |
1568 | ||
e2731add | 1569 | static void vmdk_close(BlockDriverState *bs) |
ea2384d3 | 1570 | { |
2bc3166c KW |
1571 | BDRVVmdkState *s = bs->opaque; |
1572 | ||
b3976d3c | 1573 | vmdk_free_extents(bs); |
2bc3166c KW |
1574 | |
1575 | migrate_del_blocker(s->migration_blocker); | |
1576 | error_free(s->migration_blocker); | |
ea2384d3 FB |
1577 | } |
1578 | ||
8b94ff85 | 1579 | static coroutine_fn int vmdk_co_flush(BlockDriverState *bs) |
7a6cba61 | 1580 | { |
333c574d | 1581 | BDRVVmdkState *s = bs->opaque; |
29cdb251 PB |
1582 | int i, err; |
1583 | int ret = 0; | |
333c574d | 1584 | |
333c574d | 1585 | for (i = 0; i < s->num_extents; i++) { |
8b94ff85 | 1586 | err = bdrv_co_flush(s->extents[i].file); |
333c574d FZ |
1587 | if (err < 0) { |
1588 | ret = err; | |
1589 | } | |
1590 | } | |
1591 | return ret; | |
7a6cba61 PB |
1592 | } |
1593 | ||
4a1d5e1f FZ |
1594 | static int64_t vmdk_get_allocated_file_size(BlockDriverState *bs) |
1595 | { | |
1596 | int i; | |
1597 | int64_t ret = 0; | |
1598 | int64_t r; | |
1599 | BDRVVmdkState *s = bs->opaque; | |
1600 | ||
1601 | ret = bdrv_get_allocated_file_size(bs->file); | |
1602 | if (ret < 0) { | |
1603 | return ret; | |
1604 | } | |
1605 | for (i = 0; i < s->num_extents; i++) { | |
1606 | if (s->extents[i].file == bs->file) { | |
1607 | continue; | |
1608 | } | |
1609 | r = bdrv_get_allocated_file_size(s->extents[i].file); | |
1610 | if (r < 0) { | |
1611 | return r; | |
1612 | } | |
1613 | ret += r; | |
1614 | } | |
1615 | return ret; | |
1616 | } | |
0e7e1989 KW |
1617 | |
1618 | static QEMUOptionParameter vmdk_create_options[] = { | |
db08adf5 KW |
1619 | { |
1620 | .name = BLOCK_OPT_SIZE, | |
1621 | .type = OPT_SIZE, | |
1622 | .help = "Virtual disk size" | |
1623 | }, | |
1624 | { | |
1625 | .name = BLOCK_OPT_BACKING_FILE, | |
1626 | .type = OPT_STRING, | |
1627 | .help = "File name of a base image" | |
1628 | }, | |
1629 | { | |
1630 | .name = BLOCK_OPT_COMPAT6, | |
1631 | .type = OPT_FLAG, | |
1632 | .help = "VMDK version 6 image" | |
1633 | }, | |
f66fd6c3 FZ |
1634 | { |
1635 | .name = BLOCK_OPT_SUBFMT, | |
1636 | .type = OPT_STRING, | |
1637 | .help = | |
1638 | "VMDK flat extent format, can be one of " | |
6c031aac | 1639 | "{monolithicSparse (default) | monolithicFlat | twoGbMaxExtentSparse | twoGbMaxExtentFlat | streamOptimized} " |
f66fd6c3 | 1640 | }, |
0e7e1989 KW |
1641 | { NULL } |
1642 | }; | |
1643 | ||
5efa9d5a | 1644 | static BlockDriver bdrv_vmdk = { |
ae261c86 FZ |
1645 | .format_name = "vmdk", |
1646 | .instance_size = sizeof(BDRVVmdkState), | |
1647 | .bdrv_probe = vmdk_probe, | |
6511ef77 | 1648 | .bdrv_open = vmdk_open, |
2914caa0 | 1649 | .bdrv_read = vmdk_co_read, |
e183ef75 | 1650 | .bdrv_write = vmdk_co_write, |
ae261c86 FZ |
1651 | .bdrv_close = vmdk_close, |
1652 | .bdrv_create = vmdk_create, | |
c68b89ac | 1653 | .bdrv_co_flush_to_disk = vmdk_co_flush, |
f8a2e5e3 | 1654 | .bdrv_co_is_allocated = vmdk_co_is_allocated, |
4a1d5e1f | 1655 | .bdrv_get_allocated_file_size = vmdk_get_allocated_file_size, |
0e7e1989 KW |
1656 | |
1657 | .create_options = vmdk_create_options, | |
ea2384d3 | 1658 | }; |
5efa9d5a AL |
1659 | |
1660 | static void bdrv_vmdk_init(void) | |
1661 | { | |
1662 | bdrv_register(&bdrv_vmdk); | |
1663 | } | |
1664 | ||
1665 | block_init(bdrv_vmdk_init); |