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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" |
737e150e | 27 | #include "block/block_int.h" |
1de7afc9 | 28 | #include "qemu/module.h" |
caf71f86 | 29 | #include "migration/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 |
95b0aa42 | 35 | #define VMDK4_FLAG_NL_DETECT (1 << 0) |
bb45ded9 | 36 | #define VMDK4_FLAG_RGD (1 << 1) |
14ead646 FZ |
37 | /* Zeroed-grain enable bit */ |
38 | #define VMDK4_FLAG_ZERO_GRAIN (1 << 2) | |
432bb170 FZ |
39 | #define VMDK4_FLAG_COMPRESS (1 << 16) |
40 | #define VMDK4_FLAG_MARKER (1 << 17) | |
65bd155c | 41 | #define VMDK4_GD_AT_END 0xffffffffffffffffULL |
ea2384d3 | 42 | |
14ead646 | 43 | #define VMDK_GTE_ZEROED 0x1 |
65f74725 FZ |
44 | |
45 | /* VMDK internal error codes */ | |
46 | #define VMDK_OK 0 | |
47 | #define VMDK_ERROR (-1) | |
48 | /* Cluster not allocated */ | |
49 | #define VMDK_UNALLOC (-2) | |
50 | #define VMDK_ZEROED (-3) | |
51 | ||
69e0b6df FZ |
52 | #define BLOCK_OPT_ZEROED_GRAIN "zeroed_grain" |
53 | ||
ea2384d3 FB |
54 | typedef struct { |
55 | uint32_t version; | |
56 | uint32_t flags; | |
57 | uint32_t disk_sectors; | |
58 | uint32_t granularity; | |
59 | uint32_t l1dir_offset; | |
60 | uint32_t l1dir_size; | |
61 | uint32_t file_sectors; | |
62 | uint32_t cylinders; | |
63 | uint32_t heads; | |
64 | uint32_t sectors_per_track; | |
65 | } VMDK3Header; | |
66 | ||
67 | typedef struct { | |
68 | uint32_t version; | |
69 | uint32_t flags; | |
70 | int64_t capacity; | |
71 | int64_t granularity; | |
72 | int64_t desc_offset; | |
73 | int64_t desc_size; | |
74 | int32_t num_gtes_per_gte; | |
bb45ded9 | 75 | int64_t rgd_offset; |
7a736bfa | 76 | int64_t gd_offset; |
ea2384d3 FB |
77 | int64_t grain_offset; |
78 | char filler[1]; | |
79 | char check_bytes[4]; | |
432bb170 | 80 | uint16_t compressAlgorithm; |
541dc0d4 | 81 | } QEMU_PACKED VMDK4Header; |
ea2384d3 FB |
82 | |
83 | #define L2_CACHE_SIZE 16 | |
84 | ||
b3976d3c FZ |
85 | typedef struct VmdkExtent { |
86 | BlockDriverState *file; | |
87 | bool flat; | |
432bb170 FZ |
88 | bool compressed; |
89 | bool has_marker; | |
14ead646 FZ |
90 | bool has_zero_grain; |
91 | int version; | |
b3976d3c FZ |
92 | int64_t sectors; |
93 | int64_t end_sector; | |
7fa60fa3 | 94 | int64_t flat_start_offset; |
ea2384d3 | 95 | int64_t l1_table_offset; |
ff1afc72 | 96 | int64_t l1_backup_table_offset; |
ea2384d3 | 97 | uint32_t *l1_table; |
ff1afc72 | 98 | uint32_t *l1_backup_table; |
ea2384d3 FB |
99 | unsigned int l1_size; |
100 | uint32_t l1_entry_sectors; | |
101 | ||
102 | unsigned int l2_size; | |
103 | uint32_t *l2_cache; | |
104 | uint32_t l2_cache_offsets[L2_CACHE_SIZE]; | |
105 | uint32_t l2_cache_counts[L2_CACHE_SIZE]; | |
106 | ||
107 | unsigned int cluster_sectors; | |
b3976d3c FZ |
108 | } VmdkExtent; |
109 | ||
110 | typedef struct BDRVVmdkState { | |
848c66e8 | 111 | CoMutex lock; |
e1da9b24 | 112 | int desc_offset; |
69b4d86d | 113 | bool cid_updated; |
5f4da8c0 | 114 | uint32_t parent_cid; |
b3976d3c FZ |
115 | int num_extents; |
116 | /* Extent array with num_extents entries, ascend ordered by address */ | |
117 | VmdkExtent *extents; | |
2bc3166c | 118 | Error *migration_blocker; |
ea2384d3 FB |
119 | } BDRVVmdkState; |
120 | ||
630530a6 TS |
121 | typedef struct VmdkMetaData { |
122 | uint32_t offset; | |
123 | unsigned int l1_index; | |
124 | unsigned int l2_index; | |
125 | unsigned int l2_offset; | |
126 | int valid; | |
127 | } VmdkMetaData; | |
128 | ||
432bb170 FZ |
129 | typedef struct VmdkGrainMarker { |
130 | uint64_t lba; | |
131 | uint32_t size; | |
132 | uint8_t data[0]; | |
133 | } VmdkGrainMarker; | |
134 | ||
65bd155c KW |
135 | enum { |
136 | MARKER_END_OF_STREAM = 0, | |
137 | MARKER_GRAIN_TABLE = 1, | |
138 | MARKER_GRAIN_DIRECTORY = 2, | |
139 | MARKER_FOOTER = 3, | |
140 | }; | |
141 | ||
ea2384d3 FB |
142 | static int vmdk_probe(const uint8_t *buf, int buf_size, const char *filename) |
143 | { | |
144 | uint32_t magic; | |
145 | ||
ae261c86 | 146 | if (buf_size < 4) { |
ea2384d3 | 147 | return 0; |
ae261c86 | 148 | } |
ea2384d3 FB |
149 | magic = be32_to_cpu(*(uint32_t *)buf); |
150 | if (magic == VMDK3_MAGIC || | |
01fc99d6 | 151 | magic == VMDK4_MAGIC) { |
ea2384d3 | 152 | return 100; |
01fc99d6 FZ |
153 | } else { |
154 | const char *p = (const char *)buf; | |
155 | const char *end = p + buf_size; | |
156 | while (p < end) { | |
157 | if (*p == '#') { | |
158 | /* skip comment line */ | |
159 | while (p < end && *p != '\n') { | |
160 | p++; | |
161 | } | |
162 | p++; | |
163 | continue; | |
164 | } | |
165 | if (*p == ' ') { | |
166 | while (p < end && *p == ' ') { | |
167 | p++; | |
168 | } | |
169 | /* skip '\r' if windows line endings used. */ | |
170 | if (p < end && *p == '\r') { | |
171 | p++; | |
172 | } | |
173 | /* only accept blank lines before 'version=' line */ | |
174 | if (p == end || *p != '\n') { | |
175 | return 0; | |
176 | } | |
177 | p++; | |
178 | continue; | |
179 | } | |
180 | if (end - p >= strlen("version=X\n")) { | |
181 | if (strncmp("version=1\n", p, strlen("version=1\n")) == 0 || | |
182 | strncmp("version=2\n", p, strlen("version=2\n")) == 0) { | |
183 | return 100; | |
184 | } | |
185 | } | |
186 | if (end - p >= strlen("version=X\r\n")) { | |
187 | if (strncmp("version=1\r\n", p, strlen("version=1\r\n")) == 0 || | |
188 | strncmp("version=2\r\n", p, strlen("version=2\r\n")) == 0) { | |
189 | return 100; | |
190 | } | |
191 | } | |
192 | return 0; | |
193 | } | |
ea2384d3 | 194 | return 0; |
01fc99d6 | 195 | } |
ea2384d3 FB |
196 | } |
197 | ||
5f4da8c0 TS |
198 | #define CHECK_CID 1 |
199 | ||
3b46e624 | 200 | #define SECTOR_SIZE 512 |
f66fd6c3 FZ |
201 | #define DESC_SIZE (20 * SECTOR_SIZE) /* 20 sectors of 512 bytes each */ |
202 | #define BUF_SIZE 4096 | |
203 | #define HEADER_SIZE 512 /* first sector of 512 bytes */ | |
5f4da8c0 | 204 | |
b3976d3c FZ |
205 | static void vmdk_free_extents(BlockDriverState *bs) |
206 | { | |
207 | int i; | |
208 | BDRVVmdkState *s = bs->opaque; | |
b3c0bfb6 | 209 | VmdkExtent *e; |
b3976d3c FZ |
210 | |
211 | for (i = 0; i < s->num_extents; i++) { | |
b3c0bfb6 FZ |
212 | e = &s->extents[i]; |
213 | g_free(e->l1_table); | |
214 | g_free(e->l2_cache); | |
215 | g_free(e->l1_backup_table); | |
216 | if (e->file != bs->file) { | |
217 | bdrv_delete(e->file); | |
218 | } | |
b3976d3c | 219 | } |
7267c094 | 220 | g_free(s->extents); |
b3976d3c FZ |
221 | } |
222 | ||
86c6b429 FZ |
223 | static void vmdk_free_last_extent(BlockDriverState *bs) |
224 | { | |
225 | BDRVVmdkState *s = bs->opaque; | |
226 | ||
227 | if (s->num_extents == 0) { | |
228 | return; | |
229 | } | |
230 | s->num_extents--; | |
231 | s->extents = g_realloc(s->extents, s->num_extents * sizeof(VmdkExtent)); | |
232 | } | |
233 | ||
5f4da8c0 | 234 | static uint32_t vmdk_read_cid(BlockDriverState *bs, int parent) |
ea2384d3 | 235 | { |
5f4da8c0 | 236 | char desc[DESC_SIZE]; |
8379e46d | 237 | uint32_t cid = 0xffffffff; |
7ccfb2eb | 238 | const char *p_name, *cid_str; |
5f4da8c0 | 239 | size_t cid_str_size; |
e1da9b24 | 240 | BDRVVmdkState *s = bs->opaque; |
99f1835d | 241 | int ret; |
5f4da8c0 | 242 | |
99f1835d KW |
243 | ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE); |
244 | if (ret < 0) { | |
5f4da8c0 | 245 | return 0; |
e1da9b24 | 246 | } |
5f4da8c0 TS |
247 | |
248 | if (parent) { | |
249 | cid_str = "parentCID"; | |
250 | cid_str_size = sizeof("parentCID"); | |
251 | } else { | |
252 | cid_str = "CID"; | |
253 | cid_str_size = sizeof("CID"); | |
254 | } | |
255 | ||
93897b9f | 256 | desc[DESC_SIZE - 1] = '\0'; |
ae261c86 FZ |
257 | p_name = strstr(desc, cid_str); |
258 | if (p_name != NULL) { | |
5f4da8c0 | 259 | p_name += cid_str_size; |
ae261c86 | 260 | sscanf(p_name, "%x", &cid); |
5f4da8c0 TS |
261 | } |
262 | ||
263 | return cid; | |
264 | } | |
265 | ||
266 | static int vmdk_write_cid(BlockDriverState *bs, uint32_t cid) | |
267 | { | |
5f4da8c0 TS |
268 | char desc[DESC_SIZE], tmp_desc[DESC_SIZE]; |
269 | char *p_name, *tmp_str; | |
e1da9b24 | 270 | BDRVVmdkState *s = bs->opaque; |
99f1835d | 271 | int ret; |
5f4da8c0 | 272 | |
99f1835d KW |
273 | ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE); |
274 | if (ret < 0) { | |
275 | return ret; | |
e1da9b24 | 276 | } |
5f4da8c0 | 277 | |
93897b9f | 278 | desc[DESC_SIZE - 1] = '\0'; |
ae261c86 | 279 | tmp_str = strstr(desc, "parentCID"); |
93897b9f KW |
280 | if (tmp_str == NULL) { |
281 | return -EINVAL; | |
282 | } | |
283 | ||
363a37d5 | 284 | pstrcpy(tmp_desc, sizeof(tmp_desc), tmp_str); |
ae261c86 FZ |
285 | p_name = strstr(desc, "CID"); |
286 | if (p_name != NULL) { | |
5f4da8c0 | 287 | p_name += sizeof("CID"); |
363a37d5 BS |
288 | snprintf(p_name, sizeof(desc) - (p_name - desc), "%x\n", cid); |
289 | pstrcat(desc, sizeof(desc), tmp_desc); | |
5f4da8c0 TS |
290 | } |
291 | ||
99f1835d KW |
292 | ret = bdrv_pwrite_sync(bs->file, s->desc_offset, desc, DESC_SIZE); |
293 | if (ret < 0) { | |
294 | return ret; | |
e1da9b24 | 295 | } |
99f1835d | 296 | |
5f4da8c0 TS |
297 | return 0; |
298 | } | |
299 | ||
300 | static int vmdk_is_cid_valid(BlockDriverState *bs) | |
301 | { | |
302 | #ifdef CHECK_CID | |
303 | BDRVVmdkState *s = bs->opaque; | |
b171271a | 304 | BlockDriverState *p_bs = bs->backing_hd; |
5f4da8c0 TS |
305 | uint32_t cur_pcid; |
306 | ||
307 | if (p_bs) { | |
ae261c86 FZ |
308 | cur_pcid = vmdk_read_cid(p_bs, 0); |
309 | if (s->parent_cid != cur_pcid) { | |
310 | /* CID not valid */ | |
5f4da8c0 | 311 | return 0; |
ae261c86 | 312 | } |
5f4da8c0 TS |
313 | } |
314 | #endif | |
ae261c86 | 315 | /* CID valid */ |
5f4da8c0 TS |
316 | return 1; |
317 | } | |
318 | ||
3897575f JC |
319 | /* Queue extents, if any, for reopen() */ |
320 | static int vmdk_reopen_prepare(BDRVReopenState *state, | |
321 | BlockReopenQueue *queue, Error **errp) | |
322 | { | |
323 | BDRVVmdkState *s; | |
324 | int ret = -1; | |
325 | int i; | |
326 | VmdkExtent *e; | |
327 | ||
328 | assert(state != NULL); | |
329 | assert(state->bs != NULL); | |
330 | ||
331 | if (queue == NULL) { | |
332 | error_set(errp, ERROR_CLASS_GENERIC_ERROR, | |
333 | "No reopen queue for VMDK extents"); | |
334 | goto exit; | |
335 | } | |
336 | ||
337 | s = state->bs->opaque; | |
338 | ||
339 | assert(s != NULL); | |
340 | ||
341 | for (i = 0; i < s->num_extents; i++) { | |
342 | e = &s->extents[i]; | |
343 | if (e->file != state->bs->file) { | |
344 | bdrv_reopen_queue(queue, e->file, state->flags); | |
345 | } | |
346 | } | |
347 | ret = 0; | |
348 | ||
349 | exit: | |
350 | return ret; | |
351 | } | |
352 | ||
9949f97e | 353 | static int vmdk_parent_open(BlockDriverState *bs) |
5f4da8c0 | 354 | { |
5fafdf24 | 355 | char *p_name; |
7fa60fa3 | 356 | char desc[DESC_SIZE + 1]; |
e1da9b24 | 357 | BDRVVmdkState *s = bs->opaque; |
588b65a3 | 358 | int ret; |
5f4da8c0 | 359 | |
7fa60fa3 | 360 | desc[DESC_SIZE] = '\0'; |
588b65a3 PB |
361 | ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE); |
362 | if (ret < 0) { | |
363 | return ret; | |
e1da9b24 | 364 | } |
5f4da8c0 | 365 | |
ae261c86 FZ |
366 | p_name = strstr(desc, "parentFileNameHint"); |
367 | if (p_name != NULL) { | |
5f4da8c0 | 368 | char *end_name; |
5f4da8c0 TS |
369 | |
370 | p_name += sizeof("parentFileNameHint") + 1; | |
ae261c86 FZ |
371 | end_name = strchr(p_name, '\"'); |
372 | if (end_name == NULL) { | |
588b65a3 | 373 | return -EINVAL; |
ae261c86 FZ |
374 | } |
375 | if ((end_name - p_name) > sizeof(bs->backing_file) - 1) { | |
588b65a3 | 376 | return -EINVAL; |
ae261c86 | 377 | } |
3b46e624 | 378 | |
b171271a | 379 | pstrcpy(bs->backing_file, end_name - p_name + 1, p_name); |
ff1afc72 | 380 | } |
5f4da8c0 TS |
381 | |
382 | return 0; | |
383 | } | |
384 | ||
b3976d3c FZ |
385 | /* Create and append extent to the extent array. Return the added VmdkExtent |
386 | * address. return NULL if allocation failed. */ | |
387 | static VmdkExtent *vmdk_add_extent(BlockDriverState *bs, | |
388 | BlockDriverState *file, bool flat, int64_t sectors, | |
389 | int64_t l1_offset, int64_t l1_backup_offset, | |
390 | uint32_t l1_size, | |
391 | int l2_size, unsigned int cluster_sectors) | |
392 | { | |
393 | VmdkExtent *extent; | |
394 | BDRVVmdkState *s = bs->opaque; | |
395 | ||
7267c094 | 396 | s->extents = g_realloc(s->extents, |
b3976d3c FZ |
397 | (s->num_extents + 1) * sizeof(VmdkExtent)); |
398 | extent = &s->extents[s->num_extents]; | |
399 | s->num_extents++; | |
400 | ||
401 | memset(extent, 0, sizeof(VmdkExtent)); | |
402 | extent->file = file; | |
403 | extent->flat = flat; | |
404 | extent->sectors = sectors; | |
405 | extent->l1_table_offset = l1_offset; | |
406 | extent->l1_backup_table_offset = l1_backup_offset; | |
407 | extent->l1_size = l1_size; | |
408 | extent->l1_entry_sectors = l2_size * cluster_sectors; | |
409 | extent->l2_size = l2_size; | |
410 | extent->cluster_sectors = cluster_sectors; | |
411 | ||
412 | if (s->num_extents > 1) { | |
413 | extent->end_sector = (*(extent - 1)).end_sector + extent->sectors; | |
414 | } else { | |
415 | extent->end_sector = extent->sectors; | |
416 | } | |
417 | bs->total_sectors = extent->end_sector; | |
418 | return extent; | |
419 | } | |
420 | ||
b4b3ab14 | 421 | static int vmdk_init_tables(BlockDriverState *bs, VmdkExtent *extent) |
5f4da8c0 | 422 | { |
b4b3ab14 FZ |
423 | int ret; |
424 | int l1_size, i; | |
5f4da8c0 | 425 | |
ea2384d3 | 426 | /* read the L1 table */ |
b3976d3c | 427 | l1_size = extent->l1_size * sizeof(uint32_t); |
7267c094 | 428 | extent->l1_table = g_malloc(l1_size); |
b4b3ab14 FZ |
429 | ret = bdrv_pread(extent->file, |
430 | extent->l1_table_offset, | |
431 | extent->l1_table, | |
432 | l1_size); | |
433 | if (ret < 0) { | |
434 | goto fail_l1; | |
b3976d3c FZ |
435 | } |
436 | for (i = 0; i < extent->l1_size; i++) { | |
437 | le32_to_cpus(&extent->l1_table[i]); | |
ea2384d3 FB |
438 | } |
439 | ||
b3976d3c | 440 | if (extent->l1_backup_table_offset) { |
7267c094 | 441 | extent->l1_backup_table = g_malloc(l1_size); |
b4b3ab14 FZ |
442 | ret = bdrv_pread(extent->file, |
443 | extent->l1_backup_table_offset, | |
444 | extent->l1_backup_table, | |
445 | l1_size); | |
446 | if (ret < 0) { | |
447 | goto fail_l1b; | |
b3976d3c FZ |
448 | } |
449 | for (i = 0; i < extent->l1_size; i++) { | |
450 | le32_to_cpus(&extent->l1_backup_table[i]); | |
ff1afc72 FB |
451 | } |
452 | } | |
453 | ||
b3976d3c | 454 | extent->l2_cache = |
7267c094 | 455 | g_malloc(extent->l2_size * L2_CACHE_SIZE * sizeof(uint32_t)); |
ea2384d3 | 456 | return 0; |
b4b3ab14 | 457 | fail_l1b: |
7267c094 | 458 | g_free(extent->l1_backup_table); |
b4b3ab14 | 459 | fail_l1: |
7267c094 | 460 | g_free(extent->l1_table); |
b4b3ab14 FZ |
461 | return ret; |
462 | } | |
463 | ||
86c6b429 FZ |
464 | static int vmdk_open_vmdk3(BlockDriverState *bs, |
465 | BlockDriverState *file, | |
466 | int flags) | |
b4b3ab14 FZ |
467 | { |
468 | int ret; | |
469 | uint32_t magic; | |
470 | VMDK3Header header; | |
471 | VmdkExtent *extent; | |
472 | ||
86c6b429 | 473 | ret = bdrv_pread(file, sizeof(magic), &header, sizeof(header)); |
b4b3ab14 | 474 | if (ret < 0) { |
86c6b429 | 475 | return ret; |
b4b3ab14 FZ |
476 | } |
477 | extent = vmdk_add_extent(bs, | |
478 | bs->file, false, | |
479 | le32_to_cpu(header.disk_sectors), | |
480 | le32_to_cpu(header.l1dir_offset) << 9, | |
481 | 0, 1 << 6, 1 << 9, | |
482 | le32_to_cpu(header.granularity)); | |
483 | ret = vmdk_init_tables(bs, extent); | |
484 | if (ret) { | |
86c6b429 FZ |
485 | /* free extent allocated by vmdk_add_extent */ |
486 | vmdk_free_last_extent(bs); | |
b4b3ab14 | 487 | } |
b4b3ab14 FZ |
488 | return ret; |
489 | } | |
490 | ||
f16f509d FZ |
491 | static int vmdk_open_desc_file(BlockDriverState *bs, int flags, |
492 | int64_t desc_offset); | |
493 | ||
86c6b429 FZ |
494 | static int vmdk_open_vmdk4(BlockDriverState *bs, |
495 | BlockDriverState *file, | |
496 | int flags) | |
b4b3ab14 FZ |
497 | { |
498 | int ret; | |
499 | uint32_t magic; | |
500 | uint32_t l1_size, l1_entry_sectors; | |
501 | VMDK4Header header; | |
b4b3ab14 | 502 | VmdkExtent *extent; |
bb45ded9 | 503 | int64_t l1_backup_offset = 0; |
b4b3ab14 | 504 | |
86c6b429 | 505 | ret = bdrv_pread(file, sizeof(magic), &header, sizeof(header)); |
b4b3ab14 | 506 | if (ret < 0) { |
86c6b429 | 507 | return ret; |
b4b3ab14 | 508 | } |
f16f509d FZ |
509 | if (header.capacity == 0 && header.desc_offset) { |
510 | return vmdk_open_desc_file(bs, flags, header.desc_offset << 9); | |
511 | } | |
65bd155c KW |
512 | |
513 | if (le64_to_cpu(header.gd_offset) == VMDK4_GD_AT_END) { | |
514 | /* | |
515 | * The footer takes precedence over the header, so read it in. The | |
516 | * footer starts at offset -1024 from the end: One sector for the | |
517 | * footer, and another one for the end-of-stream marker. | |
518 | */ | |
519 | struct { | |
520 | struct { | |
521 | uint64_t val; | |
522 | uint32_t size; | |
523 | uint32_t type; | |
524 | uint8_t pad[512 - 16]; | |
525 | } QEMU_PACKED footer_marker; | |
526 | ||
527 | uint32_t magic; | |
528 | VMDK4Header header; | |
529 | uint8_t pad[512 - 4 - sizeof(VMDK4Header)]; | |
530 | ||
531 | struct { | |
532 | uint64_t val; | |
533 | uint32_t size; | |
534 | uint32_t type; | |
535 | uint8_t pad[512 - 16]; | |
536 | } QEMU_PACKED eos_marker; | |
537 | } QEMU_PACKED footer; | |
538 | ||
539 | ret = bdrv_pread(file, | |
540 | bs->file->total_sectors * 512 - 1536, | |
541 | &footer, sizeof(footer)); | |
542 | if (ret < 0) { | |
543 | return ret; | |
544 | } | |
545 | ||
546 | /* Some sanity checks for the footer */ | |
547 | if (be32_to_cpu(footer.magic) != VMDK4_MAGIC || | |
548 | le32_to_cpu(footer.footer_marker.size) != 0 || | |
549 | le32_to_cpu(footer.footer_marker.type) != MARKER_FOOTER || | |
550 | le64_to_cpu(footer.eos_marker.val) != 0 || | |
551 | le32_to_cpu(footer.eos_marker.size) != 0 || | |
552 | le32_to_cpu(footer.eos_marker.type) != MARKER_END_OF_STREAM) | |
553 | { | |
554 | return -EINVAL; | |
555 | } | |
556 | ||
557 | header = footer.header; | |
558 | } | |
559 | ||
b4b3ab14 FZ |
560 | l1_entry_sectors = le32_to_cpu(header.num_gtes_per_gte) |
561 | * le64_to_cpu(header.granularity); | |
75d12341 | 562 | if (l1_entry_sectors == 0) { |
86c6b429 FZ |
563 | return -EINVAL; |
564 | } | |
b4b3ab14 FZ |
565 | l1_size = (le64_to_cpu(header.capacity) + l1_entry_sectors - 1) |
566 | / l1_entry_sectors; | |
bb45ded9 FZ |
567 | if (le32_to_cpu(header.flags) & VMDK4_FLAG_RGD) { |
568 | l1_backup_offset = le64_to_cpu(header.rgd_offset) << 9; | |
569 | } | |
86c6b429 | 570 | extent = vmdk_add_extent(bs, file, false, |
b4b3ab14 FZ |
571 | le64_to_cpu(header.capacity), |
572 | le64_to_cpu(header.gd_offset) << 9, | |
bb45ded9 | 573 | l1_backup_offset, |
b4b3ab14 FZ |
574 | l1_size, |
575 | le32_to_cpu(header.num_gtes_per_gte), | |
576 | le64_to_cpu(header.granularity)); | |
432bb170 FZ |
577 | extent->compressed = |
578 | le16_to_cpu(header.compressAlgorithm) == VMDK4_COMPRESSION_DEFLATE; | |
579 | extent->has_marker = le32_to_cpu(header.flags) & VMDK4_FLAG_MARKER; | |
14ead646 FZ |
580 | extent->version = le32_to_cpu(header.version); |
581 | extent->has_zero_grain = le32_to_cpu(header.flags) & VMDK4_FLAG_ZERO_GRAIN; | |
b4b3ab14 FZ |
582 | ret = vmdk_init_tables(bs, extent); |
583 | if (ret) { | |
86c6b429 FZ |
584 | /* free extent allocated by vmdk_add_extent */ |
585 | vmdk_free_last_extent(bs); | |
b4b3ab14 | 586 | } |
b4b3ab14 FZ |
587 | return ret; |
588 | } | |
589 | ||
7fa60fa3 FZ |
590 | /* find an option value out of descriptor file */ |
591 | static int vmdk_parse_description(const char *desc, const char *opt_name, | |
592 | char *buf, int buf_size) | |
593 | { | |
594 | char *opt_pos, *opt_end; | |
595 | const char *end = desc + strlen(desc); | |
596 | ||
597 | opt_pos = strstr(desc, opt_name); | |
598 | if (!opt_pos) { | |
65f74725 | 599 | return VMDK_ERROR; |
7fa60fa3 FZ |
600 | } |
601 | /* Skip "=\"" following opt_name */ | |
602 | opt_pos += strlen(opt_name) + 2; | |
603 | if (opt_pos >= end) { | |
65f74725 | 604 | return VMDK_ERROR; |
7fa60fa3 FZ |
605 | } |
606 | opt_end = opt_pos; | |
607 | while (opt_end < end && *opt_end != '"') { | |
608 | opt_end++; | |
609 | } | |
610 | if (opt_end == end || buf_size < opt_end - opt_pos + 1) { | |
65f74725 | 611 | return VMDK_ERROR; |
7fa60fa3 FZ |
612 | } |
613 | pstrcpy(buf, opt_end - opt_pos + 1, opt_pos); | |
65f74725 | 614 | return VMDK_OK; |
7fa60fa3 FZ |
615 | } |
616 | ||
86c6b429 FZ |
617 | /* Open an extent file and append to bs array */ |
618 | static int vmdk_open_sparse(BlockDriverState *bs, | |
619 | BlockDriverState *file, | |
620 | int flags) | |
621 | { | |
622 | uint32_t magic; | |
623 | ||
624 | if (bdrv_pread(file, 0, &magic, sizeof(magic)) != sizeof(magic)) { | |
625 | return -EIO; | |
626 | } | |
627 | ||
628 | magic = be32_to_cpu(magic); | |
629 | switch (magic) { | |
630 | case VMDK3_MAGIC: | |
631 | return vmdk_open_vmdk3(bs, file, flags); | |
632 | break; | |
633 | case VMDK4_MAGIC: | |
634 | return vmdk_open_vmdk4(bs, file, flags); | |
635 | break; | |
636 | default: | |
15bac0d5 | 637 | return -EMEDIUMTYPE; |
86c6b429 FZ |
638 | break; |
639 | } | |
640 | } | |
641 | ||
7fa60fa3 FZ |
642 | static int vmdk_parse_extents(const char *desc, BlockDriverState *bs, |
643 | const char *desc_file_path) | |
644 | { | |
645 | int ret; | |
646 | char access[11]; | |
647 | char type[11]; | |
648 | char fname[512]; | |
649 | const char *p = desc; | |
650 | int64_t sectors = 0; | |
651 | int64_t flat_offset; | |
86c6b429 FZ |
652 | char extent_path[PATH_MAX]; |
653 | BlockDriverState *extent_file; | |
7fa60fa3 FZ |
654 | |
655 | while (*p) { | |
656 | /* parse extent line: | |
657 | * RW [size in sectors] FLAT "file-name.vmdk" OFFSET | |
658 | * or | |
659 | * RW [size in sectors] SPARSE "file-name.vmdk" | |
660 | */ | |
661 | flat_offset = -1; | |
cd923475 | 662 | ret = sscanf(p, "%10s %" SCNd64 " %10s \"%511[^\n\r\"]\" %" SCNd64, |
7fa60fa3 FZ |
663 | access, §ors, type, fname, &flat_offset); |
664 | if (ret < 4 || strcmp(access, "RW")) { | |
665 | goto next_line; | |
666 | } else if (!strcmp(type, "FLAT")) { | |
667 | if (ret != 5 || flat_offset < 0) { | |
668 | return -EINVAL; | |
669 | } | |
670 | } else if (ret != 4) { | |
671 | return -EINVAL; | |
672 | } | |
673 | ||
7fa60fa3 FZ |
674 | if (sectors <= 0 || |
675 | (strcmp(type, "FLAT") && strcmp(type, "SPARSE")) || | |
676 | (strcmp(access, "RW"))) { | |
677 | goto next_line; | |
678 | } | |
679 | ||
86c6b429 FZ |
680 | path_combine(extent_path, sizeof(extent_path), |
681 | desc_file_path, fname); | |
787e4a85 | 682 | ret = bdrv_file_open(&extent_file, extent_path, NULL, bs->open_flags); |
86c6b429 FZ |
683 | if (ret) { |
684 | return ret; | |
685 | } | |
686 | ||
7fa60fa3 FZ |
687 | /* save to extents array */ |
688 | if (!strcmp(type, "FLAT")) { | |
689 | /* FLAT extent */ | |
7fa60fa3 FZ |
690 | VmdkExtent *extent; |
691 | ||
7fa60fa3 FZ |
692 | extent = vmdk_add_extent(bs, extent_file, true, sectors, |
693 | 0, 0, 0, 0, sectors); | |
f16f509d | 694 | extent->flat_start_offset = flat_offset << 9; |
86c6b429 FZ |
695 | } else if (!strcmp(type, "SPARSE")) { |
696 | /* SPARSE extent */ | |
697 | ret = vmdk_open_sparse(bs, extent_file, bs->open_flags); | |
698 | if (ret) { | |
699 | bdrv_delete(extent_file); | |
700 | return ret; | |
701 | } | |
7fa60fa3 | 702 | } else { |
7fa60fa3 FZ |
703 | fprintf(stderr, |
704 | "VMDK: Not supported extent type \"%s\""".\n", type); | |
705 | return -ENOTSUP; | |
706 | } | |
707 | next_line: | |
708 | /* move to next line */ | |
709 | while (*p && *p != '\n') { | |
710 | p++; | |
711 | } | |
712 | p++; | |
713 | } | |
714 | return 0; | |
715 | } | |
716 | ||
f16f509d FZ |
717 | static int vmdk_open_desc_file(BlockDriverState *bs, int flags, |
718 | int64_t desc_offset) | |
7fa60fa3 FZ |
719 | { |
720 | int ret; | |
721 | char buf[2048]; | |
722 | char ct[128]; | |
723 | BDRVVmdkState *s = bs->opaque; | |
724 | ||
f16f509d | 725 | ret = bdrv_pread(bs->file, desc_offset, buf, sizeof(buf)); |
7fa60fa3 FZ |
726 | if (ret < 0) { |
727 | return ret; | |
728 | } | |
729 | buf[2047] = '\0'; | |
730 | if (vmdk_parse_description(buf, "createType", ct, sizeof(ct))) { | |
15bac0d5 | 731 | return -EMEDIUMTYPE; |
7fa60fa3 | 732 | } |
6398de51 | 733 | if (strcmp(ct, "monolithicFlat") && |
86c6b429 | 734 | strcmp(ct, "twoGbMaxExtentSparse") && |
6398de51 | 735 | strcmp(ct, "twoGbMaxExtentFlat")) { |
7fa60fa3 FZ |
736 | fprintf(stderr, |
737 | "VMDK: Not supported image type \"%s\""".\n", ct); | |
738 | return -ENOTSUP; | |
739 | } | |
740 | s->desc_offset = 0; | |
bae0a0cc | 741 | return vmdk_parse_extents(buf, bs, bs->file->filename); |
7fa60fa3 FZ |
742 | } |
743 | ||
1a86938f | 744 | static int vmdk_open(BlockDriverState *bs, QDict *options, int flags) |
b4b3ab14 | 745 | { |
86c6b429 FZ |
746 | int ret; |
747 | BDRVVmdkState *s = bs->opaque; | |
b4b3ab14 | 748 | |
86c6b429 FZ |
749 | if (vmdk_open_sparse(bs, bs->file, flags) == 0) { |
750 | s->desc_offset = 0x200; | |
bae0a0cc PB |
751 | } else { |
752 | ret = vmdk_open_desc_file(bs, flags, 0); | |
86c6b429 | 753 | if (ret) { |
bae0a0cc | 754 | goto fail; |
86c6b429 | 755 | } |
b4b3ab14 | 756 | } |
bae0a0cc PB |
757 | /* try to open parent images, if exist */ |
758 | ret = vmdk_parent_open(bs); | |
759 | if (ret) { | |
760 | goto fail; | |
761 | } | |
762 | s->parent_cid = vmdk_read_cid(bs, 1); | |
848c66e8 | 763 | qemu_co_mutex_init(&s->lock); |
2bc3166c KW |
764 | |
765 | /* Disable migration when VMDK images are used */ | |
766 | error_set(&s->migration_blocker, | |
767 | QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED, | |
768 | "vmdk", bs->device_name, "live migration"); | |
769 | migrate_add_blocker(s->migration_blocker); | |
770 | ||
771 | return 0; | |
bae0a0cc PB |
772 | |
773 | fail: | |
774 | vmdk_free_extents(bs); | |
775 | return ret; | |
ea2384d3 FB |
776 | } |
777 | ||
b3976d3c FZ |
778 | static int get_whole_cluster(BlockDriverState *bs, |
779 | VmdkExtent *extent, | |
780 | uint64_t cluster_offset, | |
781 | uint64_t offset, | |
782 | bool allocate) | |
5f4da8c0 | 783 | { |
b3976d3c FZ |
784 | /* 128 sectors * 512 bytes each = grain size 64KB */ |
785 | uint8_t whole_grain[extent->cluster_sectors * 512]; | |
5f4da8c0 | 786 | |
0e69c543 FZ |
787 | /* we will be here if it's first write on non-exist grain(cluster). |
788 | * try to read from parent image, if exist */ | |
b171271a | 789 | if (bs->backing_hd) { |
c336500d | 790 | int ret; |
5f4da8c0 | 791 | |
ae261c86 | 792 | if (!vmdk_is_cid_valid(bs)) { |
65f74725 | 793 | return VMDK_ERROR; |
ae261c86 | 794 | } |
5f4da8c0 | 795 | |
0e69c543 FZ |
796 | /* floor offset to cluster */ |
797 | offset -= offset % (extent->cluster_sectors * 512); | |
c336500d | 798 | ret = bdrv_read(bs->backing_hd, offset >> 9, whole_grain, |
b3976d3c | 799 | extent->cluster_sectors); |
c336500d | 800 | if (ret < 0) { |
65f74725 | 801 | return VMDK_ERROR; |
c336500d | 802 | } |
630530a6 | 803 | |
0e69c543 | 804 | /* Write grain only into the active image */ |
b3976d3c FZ |
805 | ret = bdrv_write(extent->file, cluster_offset, whole_grain, |
806 | extent->cluster_sectors); | |
c336500d | 807 | if (ret < 0) { |
65f74725 | 808 | return VMDK_ERROR; |
630530a6 TS |
809 | } |
810 | } | |
65f74725 | 811 | return VMDK_OK; |
630530a6 TS |
812 | } |
813 | ||
b3976d3c | 814 | static int vmdk_L2update(VmdkExtent *extent, VmdkMetaData *m_data) |
630530a6 | 815 | { |
e304e8e5 FZ |
816 | uint32_t offset; |
817 | QEMU_BUILD_BUG_ON(sizeof(offset) != sizeof(m_data->offset)); | |
818 | offset = cpu_to_le32(m_data->offset); | |
630530a6 | 819 | /* update L2 table */ |
b3976d3c FZ |
820 | if (bdrv_pwrite_sync( |
821 | extent->file, | |
822 | ((int64_t)m_data->l2_offset * 512) | |
823 | + (m_data->l2_index * sizeof(m_data->offset)), | |
e304e8e5 | 824 | &offset, sizeof(offset)) < 0) { |
65f74725 | 825 | return VMDK_ERROR; |
b3976d3c | 826 | } |
630530a6 | 827 | /* update backup L2 table */ |
b3976d3c FZ |
828 | if (extent->l1_backup_table_offset != 0) { |
829 | m_data->l2_offset = extent->l1_backup_table[m_data->l1_index]; | |
830 | if (bdrv_pwrite_sync( | |
831 | extent->file, | |
832 | ((int64_t)m_data->l2_offset * 512) | |
833 | + (m_data->l2_index * sizeof(m_data->offset)), | |
e304e8e5 | 834 | &offset, sizeof(offset)) < 0) { |
65f74725 | 835 | return VMDK_ERROR; |
b3976d3c | 836 | } |
5f4da8c0 | 837 | } |
630530a6 | 838 | |
65f74725 | 839 | return VMDK_OK; |
5f4da8c0 TS |
840 | } |
841 | ||
91b85bd3 | 842 | static int get_cluster_offset(BlockDriverState *bs, |
b3976d3c FZ |
843 | VmdkExtent *extent, |
844 | VmdkMetaData *m_data, | |
91b85bd3 FZ |
845 | uint64_t offset, |
846 | int allocate, | |
847 | uint64_t *cluster_offset) | |
ea2384d3 | 848 | { |
ea2384d3 FB |
849 | unsigned int l1_index, l2_offset, l2_index; |
850 | int min_index, i, j; | |
e304e8e5 | 851 | uint32_t min_count, *l2_table; |
14ead646 | 852 | bool zeroed = false; |
630530a6 | 853 | |
ae261c86 | 854 | if (m_data) { |
630530a6 | 855 | m_data->valid = 0; |
ae261c86 | 856 | } |
91b85bd3 | 857 | if (extent->flat) { |
7fa60fa3 | 858 | *cluster_offset = extent->flat_start_offset; |
65f74725 | 859 | return VMDK_OK; |
91b85bd3 | 860 | } |
630530a6 | 861 | |
6398de51 | 862 | offset -= (extent->end_sector - extent->sectors) * SECTOR_SIZE; |
b3976d3c FZ |
863 | l1_index = (offset >> 9) / extent->l1_entry_sectors; |
864 | if (l1_index >= extent->l1_size) { | |
65f74725 | 865 | return VMDK_ERROR; |
b3976d3c FZ |
866 | } |
867 | l2_offset = extent->l1_table[l1_index]; | |
868 | if (!l2_offset) { | |
65f74725 | 869 | return VMDK_UNALLOC; |
b3976d3c | 870 | } |
b4b3ab14 | 871 | for (i = 0; i < L2_CACHE_SIZE; i++) { |
b3976d3c | 872 | if (l2_offset == extent->l2_cache_offsets[i]) { |
ea2384d3 | 873 | /* increment the hit count */ |
b3976d3c | 874 | if (++extent->l2_cache_counts[i] == 0xffffffff) { |
b4b3ab14 | 875 | for (j = 0; j < L2_CACHE_SIZE; j++) { |
b3976d3c | 876 | extent->l2_cache_counts[j] >>= 1; |
ea2384d3 FB |
877 | } |
878 | } | |
b3976d3c | 879 | l2_table = extent->l2_cache + (i * extent->l2_size); |
ea2384d3 FB |
880 | goto found; |
881 | } | |
882 | } | |
883 | /* not found: load a new entry in the least used one */ | |
884 | min_index = 0; | |
885 | min_count = 0xffffffff; | |
b4b3ab14 | 886 | for (i = 0; i < L2_CACHE_SIZE; i++) { |
b3976d3c FZ |
887 | if (extent->l2_cache_counts[i] < min_count) { |
888 | min_count = extent->l2_cache_counts[i]; | |
ea2384d3 FB |
889 | min_index = i; |
890 | } | |
891 | } | |
b3976d3c FZ |
892 | l2_table = extent->l2_cache + (min_index * extent->l2_size); |
893 | if (bdrv_pread( | |
894 | extent->file, | |
895 | (int64_t)l2_offset * 512, | |
896 | l2_table, | |
897 | extent->l2_size * sizeof(uint32_t) | |
898 | ) != extent->l2_size * sizeof(uint32_t)) { | |
65f74725 | 899 | return VMDK_ERROR; |
b3976d3c | 900 | } |
5f4da8c0 | 901 | |
b3976d3c FZ |
902 | extent->l2_cache_offsets[min_index] = l2_offset; |
903 | extent->l2_cache_counts[min_index] = 1; | |
ea2384d3 | 904 | found: |
b3976d3c | 905 | l2_index = ((offset >> 9) / extent->cluster_sectors) % extent->l2_size; |
91b85bd3 | 906 | *cluster_offset = le32_to_cpu(l2_table[l2_index]); |
630530a6 | 907 | |
14ead646 FZ |
908 | if (extent->has_zero_grain && *cluster_offset == VMDK_GTE_ZEROED) { |
909 | zeroed = true; | |
910 | } | |
911 | ||
912 | if (!*cluster_offset || zeroed) { | |
91b85bd3 | 913 | if (!allocate) { |
14ead646 | 914 | return zeroed ? VMDK_ZEROED : VMDK_UNALLOC; |
91b85bd3 | 915 | } |
9949f97e | 916 | |
ae261c86 | 917 | /* Avoid the L2 tables update for the images that have snapshots. */ |
91b85bd3 | 918 | *cluster_offset = bdrv_getlength(extent->file); |
2b2c8c5d FZ |
919 | if (!extent->compressed) { |
920 | bdrv_truncate( | |
921 | extent->file, | |
922 | *cluster_offset + (extent->cluster_sectors << 9) | |
923 | ); | |
924 | } | |
9949f97e | 925 | |
91b85bd3 | 926 | *cluster_offset >>= 9; |
e304e8e5 | 927 | l2_table[l2_index] = cpu_to_le32(*cluster_offset); |
630530a6 | 928 | |
630530a6 TS |
929 | /* First of all we write grain itself, to avoid race condition |
930 | * that may to corrupt the image. | |
931 | * This problem may occur because of insufficient space on host disk | |
932 | * or inappropriate VM shutdown. | |
933 | */ | |
b3976d3c | 934 | if (get_whole_cluster( |
ae261c86 | 935 | bs, extent, *cluster_offset, offset, allocate) == -1) { |
65f74725 | 936 | return VMDK_ERROR; |
ae261c86 | 937 | } |
630530a6 TS |
938 | |
939 | if (m_data) { | |
e304e8e5 | 940 | m_data->offset = *cluster_offset; |
630530a6 TS |
941 | m_data->l1_index = l1_index; |
942 | m_data->l2_index = l2_index; | |
943 | m_data->l2_offset = l2_offset; | |
944 | m_data->valid = 1; | |
945 | } | |
ff1afc72 | 946 | } |
91b85bd3 | 947 | *cluster_offset <<= 9; |
65f74725 | 948 | return VMDK_OK; |
ea2384d3 FB |
949 | } |
950 | ||
b3976d3c FZ |
951 | static VmdkExtent *find_extent(BDRVVmdkState *s, |
952 | int64_t sector_num, VmdkExtent *start_hint) | |
953 | { | |
954 | VmdkExtent *extent = start_hint; | |
955 | ||
956 | if (!extent) { | |
957 | extent = &s->extents[0]; | |
958 | } | |
959 | while (extent < &s->extents[s->num_extents]) { | |
960 | if (sector_num < extent->end_sector) { | |
961 | return extent; | |
962 | } | |
963 | extent++; | |
964 | } | |
965 | return NULL; | |
966 | } | |
967 | ||
f8a2e5e3 SH |
968 | static int coroutine_fn vmdk_co_is_allocated(BlockDriverState *bs, |
969 | int64_t sector_num, int nb_sectors, int *pnum) | |
ea2384d3 FB |
970 | { |
971 | BDRVVmdkState *s = bs->opaque; | |
b3976d3c FZ |
972 | int64_t index_in_cluster, n, ret; |
973 | uint64_t offset; | |
974 | VmdkExtent *extent; | |
975 | ||
976 | extent = find_extent(s, sector_num, NULL); | |
977 | if (!extent) { | |
978 | return 0; | |
979 | } | |
f8a2e5e3 | 980 | qemu_co_mutex_lock(&s->lock); |
91b85bd3 FZ |
981 | ret = get_cluster_offset(bs, extent, NULL, |
982 | sector_num * 512, 0, &offset); | |
f8a2e5e3 | 983 | qemu_co_mutex_unlock(&s->lock); |
14ead646 FZ |
984 | |
985 | ret = (ret == VMDK_OK || ret == VMDK_ZEROED); | |
91b85bd3 FZ |
986 | |
987 | index_in_cluster = sector_num % extent->cluster_sectors; | |
988 | n = extent->cluster_sectors - index_in_cluster; | |
ae261c86 | 989 | if (n > nb_sectors) { |
ea2384d3 | 990 | n = nb_sectors; |
ae261c86 | 991 | } |
ea2384d3 | 992 | *pnum = n; |
b3976d3c | 993 | return ret; |
ea2384d3 FB |
994 | } |
995 | ||
dd3f6ee2 FZ |
996 | static int vmdk_write_extent(VmdkExtent *extent, int64_t cluster_offset, |
997 | int64_t offset_in_cluster, const uint8_t *buf, | |
998 | int nb_sectors, int64_t sector_num) | |
999 | { | |
1000 | int ret; | |
2b2c8c5d FZ |
1001 | VmdkGrainMarker *data = NULL; |
1002 | uLongf buf_len; | |
dd3f6ee2 FZ |
1003 | const uint8_t *write_buf = buf; |
1004 | int write_len = nb_sectors * 512; | |
1005 | ||
2b2c8c5d FZ |
1006 | if (extent->compressed) { |
1007 | if (!extent->has_marker) { | |
1008 | ret = -EINVAL; | |
1009 | goto out; | |
1010 | } | |
1011 | buf_len = (extent->cluster_sectors << 9) * 2; | |
1012 | data = g_malloc(buf_len + sizeof(VmdkGrainMarker)); | |
1013 | if (compress(data->data, &buf_len, buf, nb_sectors << 9) != Z_OK || | |
1014 | buf_len == 0) { | |
1015 | ret = -EINVAL; | |
1016 | goto out; | |
1017 | } | |
1018 | data->lba = sector_num; | |
1019 | data->size = buf_len; | |
1020 | write_buf = (uint8_t *)data; | |
1021 | write_len = buf_len + sizeof(VmdkGrainMarker); | |
1022 | } | |
dd3f6ee2 FZ |
1023 | ret = bdrv_pwrite(extent->file, |
1024 | cluster_offset + offset_in_cluster, | |
1025 | write_buf, | |
1026 | write_len); | |
1027 | if (ret != write_len) { | |
1028 | ret = ret < 0 ? ret : -EIO; | |
1029 | goto out; | |
1030 | } | |
1031 | ret = 0; | |
1032 | out: | |
2b2c8c5d | 1033 | g_free(data); |
dd3f6ee2 FZ |
1034 | return ret; |
1035 | } | |
1036 | ||
1037 | static int vmdk_read_extent(VmdkExtent *extent, int64_t cluster_offset, | |
1038 | int64_t offset_in_cluster, uint8_t *buf, | |
1039 | int nb_sectors) | |
1040 | { | |
1041 | int ret; | |
2b2c8c5d FZ |
1042 | int cluster_bytes, buf_bytes; |
1043 | uint8_t *cluster_buf, *compressed_data; | |
1044 | uint8_t *uncomp_buf; | |
1045 | uint32_t data_len; | |
1046 | VmdkGrainMarker *marker; | |
1047 | uLongf buf_len; | |
1048 | ||
dd3f6ee2 | 1049 | |
2b2c8c5d FZ |
1050 | if (!extent->compressed) { |
1051 | ret = bdrv_pread(extent->file, | |
1052 | cluster_offset + offset_in_cluster, | |
1053 | buf, nb_sectors * 512); | |
1054 | if (ret == nb_sectors * 512) { | |
1055 | return 0; | |
1056 | } else { | |
1057 | return -EIO; | |
1058 | } | |
1059 | } | |
1060 | cluster_bytes = extent->cluster_sectors * 512; | |
1061 | /* Read two clusters in case GrainMarker + compressed data > one cluster */ | |
1062 | buf_bytes = cluster_bytes * 2; | |
1063 | cluster_buf = g_malloc(buf_bytes); | |
1064 | uncomp_buf = g_malloc(cluster_bytes); | |
dd3f6ee2 | 1065 | ret = bdrv_pread(extent->file, |
2b2c8c5d FZ |
1066 | cluster_offset, |
1067 | cluster_buf, buf_bytes); | |
1068 | if (ret < 0) { | |
1069 | goto out; | |
1070 | } | |
1071 | compressed_data = cluster_buf; | |
1072 | buf_len = cluster_bytes; | |
1073 | data_len = cluster_bytes; | |
1074 | if (extent->has_marker) { | |
1075 | marker = (VmdkGrainMarker *)cluster_buf; | |
1076 | compressed_data = marker->data; | |
1077 | data_len = le32_to_cpu(marker->size); | |
1078 | } | |
1079 | if (!data_len || data_len > buf_bytes) { | |
1080 | ret = -EINVAL; | |
1081 | goto out; | |
1082 | } | |
1083 | ret = uncompress(uncomp_buf, &buf_len, compressed_data, data_len); | |
1084 | if (ret != Z_OK) { | |
1085 | ret = -EINVAL; | |
1086 | goto out; | |
1087 | ||
1088 | } | |
1089 | if (offset_in_cluster < 0 || | |
1090 | offset_in_cluster + nb_sectors * 512 > buf_len) { | |
1091 | ret = -EINVAL; | |
1092 | goto out; | |
dd3f6ee2 | 1093 | } |
2b2c8c5d FZ |
1094 | memcpy(buf, uncomp_buf + offset_in_cluster, nb_sectors * 512); |
1095 | ret = 0; | |
1096 | ||
1097 | out: | |
1098 | g_free(uncomp_buf); | |
1099 | g_free(cluster_buf); | |
1100 | return ret; | |
dd3f6ee2 FZ |
1101 | } |
1102 | ||
5fafdf24 | 1103 | static int vmdk_read(BlockDriverState *bs, int64_t sector_num, |
ea2384d3 FB |
1104 | uint8_t *buf, int nb_sectors) |
1105 | { | |
1106 | BDRVVmdkState *s = bs->opaque; | |
b3976d3c FZ |
1107 | int ret; |
1108 | uint64_t n, index_in_cluster; | |
b1649fae | 1109 | uint64_t extent_begin_sector, extent_relative_sector_num; |
b3976d3c | 1110 | VmdkExtent *extent = NULL; |
ea2384d3 | 1111 | uint64_t cluster_offset; |
5f4da8c0 | 1112 | |
ea2384d3 | 1113 | while (nb_sectors > 0) { |
b3976d3c FZ |
1114 | extent = find_extent(s, sector_num, extent); |
1115 | if (!extent) { | |
1116 | return -EIO; | |
1117 | } | |
91b85bd3 FZ |
1118 | ret = get_cluster_offset( |
1119 | bs, extent, NULL, | |
1120 | sector_num << 9, 0, &cluster_offset); | |
b1649fae GW |
1121 | extent_begin_sector = extent->end_sector - extent->sectors; |
1122 | extent_relative_sector_num = sector_num - extent_begin_sector; | |
1123 | index_in_cluster = extent_relative_sector_num % extent->cluster_sectors; | |
b3976d3c | 1124 | n = extent->cluster_sectors - index_in_cluster; |
ae261c86 | 1125 | if (n > nb_sectors) { |
ea2384d3 | 1126 | n = nb_sectors; |
ae261c86 | 1127 | } |
14ead646 | 1128 | if (ret != VMDK_OK) { |
91b85bd3 | 1129 | /* if not allocated, try to read from parent image, if exist */ |
14ead646 | 1130 | if (bs->backing_hd && ret != VMDK_ZEROED) { |
ae261c86 | 1131 | if (!vmdk_is_cid_valid(bs)) { |
7fa60fa3 | 1132 | return -EINVAL; |
ae261c86 | 1133 | } |
b171271a | 1134 | ret = bdrv_read(bs->backing_hd, sector_num, buf, n); |
ae261c86 | 1135 | if (ret < 0) { |
7fa60fa3 | 1136 | return ret; |
ae261c86 | 1137 | } |
5f4da8c0 TS |
1138 | } else { |
1139 | memset(buf, 0, 512 * n); | |
1140 | } | |
ea2384d3 | 1141 | } else { |
dd3f6ee2 FZ |
1142 | ret = vmdk_read_extent(extent, |
1143 | cluster_offset, index_in_cluster * 512, | |
1144 | buf, n); | |
1145 | if (ret) { | |
7fa60fa3 FZ |
1146 | return ret; |
1147 | } | |
ea2384d3 FB |
1148 | } |
1149 | nb_sectors -= n; | |
1150 | sector_num += n; | |
1151 | buf += n * 512; | |
1152 | } | |
1153 | return 0; | |
1154 | } | |
1155 | ||
2914caa0 PB |
1156 | static coroutine_fn int vmdk_co_read(BlockDriverState *bs, int64_t sector_num, |
1157 | uint8_t *buf, int nb_sectors) | |
1158 | { | |
1159 | int ret; | |
1160 | BDRVVmdkState *s = bs->opaque; | |
1161 | qemu_co_mutex_lock(&s->lock); | |
1162 | ret = vmdk_read(bs, sector_num, buf, nb_sectors); | |
1163 | qemu_co_mutex_unlock(&s->lock); | |
1164 | return ret; | |
1165 | } | |
1166 | ||
5fafdf24 | 1167 | static int vmdk_write(BlockDriverState *bs, int64_t sector_num, |
ea2384d3 FB |
1168 | const uint8_t *buf, int nb_sectors) |
1169 | { | |
ff1afc72 | 1170 | BDRVVmdkState *s = bs->opaque; |
b3976d3c | 1171 | VmdkExtent *extent = NULL; |
91b85bd3 | 1172 | int n, ret; |
b3976d3c | 1173 | int64_t index_in_cluster; |
b1649fae | 1174 | uint64_t extent_begin_sector, extent_relative_sector_num; |
ff1afc72 | 1175 | uint64_t cluster_offset; |
b3976d3c | 1176 | VmdkMetaData m_data; |
ff1afc72 | 1177 | |
630530a6 TS |
1178 | if (sector_num > bs->total_sectors) { |
1179 | fprintf(stderr, | |
92868412 JM |
1180 | "(VMDK) Wrong offset: sector_num=0x%" PRIx64 |
1181 | " total_sectors=0x%" PRIx64 "\n", | |
630530a6 | 1182 | sector_num, bs->total_sectors); |
7fa60fa3 | 1183 | return -EIO; |
630530a6 TS |
1184 | } |
1185 | ||
ff1afc72 | 1186 | while (nb_sectors > 0) { |
b3976d3c FZ |
1187 | extent = find_extent(s, sector_num, extent); |
1188 | if (!extent) { | |
1189 | return -EIO; | |
1190 | } | |
91b85bd3 | 1191 | ret = get_cluster_offset( |
b3976d3c FZ |
1192 | bs, |
1193 | extent, | |
1194 | &m_data, | |
2b2c8c5d | 1195 | sector_num << 9, !extent->compressed, |
91b85bd3 | 1196 | &cluster_offset); |
2b2c8c5d | 1197 | if (extent->compressed) { |
65f74725 | 1198 | if (ret == VMDK_OK) { |
2b2c8c5d FZ |
1199 | /* Refuse write to allocated cluster for streamOptimized */ |
1200 | fprintf(stderr, | |
1201 | "VMDK: can't write to allocated cluster" | |
1202 | " for streamOptimized\n"); | |
1203 | return -EIO; | |
1204 | } else { | |
1205 | /* allocate */ | |
1206 | ret = get_cluster_offset( | |
1207 | bs, | |
1208 | extent, | |
1209 | &m_data, | |
1210 | sector_num << 9, 1, | |
1211 | &cluster_offset); | |
1212 | } | |
1213 | } | |
91b85bd3 FZ |
1214 | if (ret) { |
1215 | return -EINVAL; | |
b3976d3c | 1216 | } |
b1649fae GW |
1217 | extent_begin_sector = extent->end_sector - extent->sectors; |
1218 | extent_relative_sector_num = sector_num - extent_begin_sector; | |
1219 | index_in_cluster = extent_relative_sector_num % extent->cluster_sectors; | |
b3976d3c FZ |
1220 | n = extent->cluster_sectors - index_in_cluster; |
1221 | if (n > nb_sectors) { | |
1222 | n = nb_sectors; | |
1223 | } | |
630530a6 | 1224 | |
dd3f6ee2 FZ |
1225 | ret = vmdk_write_extent(extent, |
1226 | cluster_offset, index_in_cluster * 512, | |
1227 | buf, n, sector_num); | |
1228 | if (ret) { | |
7fa60fa3 | 1229 | return ret; |
b3976d3c | 1230 | } |
630530a6 TS |
1231 | if (m_data.valid) { |
1232 | /* update L2 tables */ | |
b3976d3c | 1233 | if (vmdk_L2update(extent, &m_data) == -1) { |
7fa60fa3 | 1234 | return -EIO; |
b3976d3c | 1235 | } |
630530a6 | 1236 | } |
ff1afc72 FB |
1237 | nb_sectors -= n; |
1238 | sector_num += n; | |
1239 | buf += n * 512; | |
5f4da8c0 | 1240 | |
ae261c86 FZ |
1241 | /* update CID on the first write every time the virtual disk is |
1242 | * opened */ | |
69b4d86d | 1243 | if (!s->cid_updated) { |
99f1835d KW |
1244 | ret = vmdk_write_cid(bs, time(NULL)); |
1245 | if (ret < 0) { | |
1246 | return ret; | |
1247 | } | |
69b4d86d | 1248 | s->cid_updated = true; |
5f4da8c0 | 1249 | } |
ff1afc72 FB |
1250 | } |
1251 | return 0; | |
ea2384d3 FB |
1252 | } |
1253 | ||
e183ef75 PB |
1254 | static coroutine_fn int vmdk_co_write(BlockDriverState *bs, int64_t sector_num, |
1255 | const uint8_t *buf, int nb_sectors) | |
1256 | { | |
1257 | int ret; | |
1258 | BDRVVmdkState *s = bs->opaque; | |
1259 | qemu_co_mutex_lock(&s->lock); | |
1260 | ret = vmdk_write(bs, sector_num, buf, nb_sectors); | |
1261 | qemu_co_mutex_unlock(&s->lock); | |
1262 | return ret; | |
1263 | } | |
1264 | ||
f66fd6c3 | 1265 | |
6c031aac | 1266 | static int vmdk_create_extent(const char *filename, int64_t filesize, |
69e0b6df | 1267 | bool flat, bool compress, bool zeroed_grain) |
8979b227 | 1268 | { |
f66fd6c3 FZ |
1269 | int ret, i; |
1270 | int fd = 0; | |
8979b227 FB |
1271 | VMDK4Header header; |
1272 | uint32_t tmp, magic, grains, gd_size, gt_size, gt_count; | |
0e7e1989 | 1273 | |
6165f4d8 CB |
1274 | fd = qemu_open(filename, |
1275 | O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE, | |
1276 | 0644); | |
f66fd6c3 FZ |
1277 | if (fd < 0) { |
1278 | return -errno; | |
0e7e1989 | 1279 | } |
f66fd6c3 FZ |
1280 | if (flat) { |
1281 | ret = ftruncate(fd, filesize); | |
1282 | if (ret < 0) { | |
1283 | ret = -errno; | |
1284 | } | |
1285 | goto exit; | |
5f4da8c0 | 1286 | } |
8979b227 FB |
1287 | magic = cpu_to_be32(VMDK4_MAGIC); |
1288 | memset(&header, 0, sizeof(header)); | |
69e0b6df | 1289 | header.version = zeroed_grain ? 2 : 1; |
95b0aa42 | 1290 | header.flags = VMDK4_FLAG_RGD | VMDK4_FLAG_NL_DETECT |
69e0b6df FZ |
1291 | | (compress ? VMDK4_FLAG_COMPRESS | VMDK4_FLAG_MARKER : 0) |
1292 | | (zeroed_grain ? VMDK4_FLAG_ZERO_GRAIN : 0); | |
6c031aac | 1293 | header.compressAlgorithm = compress ? VMDK4_COMPRESSION_DEFLATE : 0; |
f66fd6c3 | 1294 | header.capacity = filesize / 512; |
16372ff0 AG |
1295 | header.granularity = 128; |
1296 | header.num_gtes_per_gte = 512; | |
8979b227 | 1297 | |
f66fd6c3 | 1298 | grains = (filesize / 512 + header.granularity - 1) / header.granularity; |
8979b227 | 1299 | gt_size = ((header.num_gtes_per_gte * sizeof(uint32_t)) + 511) >> 9; |
f66fd6c3 FZ |
1300 | gt_count = |
1301 | (grains + header.num_gtes_per_gte - 1) / header.num_gtes_per_gte; | |
8979b227 FB |
1302 | gd_size = (gt_count * sizeof(uint32_t) + 511) >> 9; |
1303 | ||
1304 | header.desc_offset = 1; | |
1305 | header.desc_size = 20; | |
1306 | header.rgd_offset = header.desc_offset + header.desc_size; | |
1307 | header.gd_offset = header.rgd_offset + gd_size + (gt_size * gt_count); | |
1308 | header.grain_offset = | |
1309 | ((header.gd_offset + gd_size + (gt_size * gt_count) + | |
1310 | header.granularity - 1) / header.granularity) * | |
1311 | header.granularity; | |
16372ff0 AG |
1312 | /* swap endianness for all header fields */ |
1313 | header.version = cpu_to_le32(header.version); | |
1314 | header.flags = cpu_to_le32(header.flags); | |
1315 | header.capacity = cpu_to_le64(header.capacity); | |
1316 | header.granularity = cpu_to_le64(header.granularity); | |
1317 | header.num_gtes_per_gte = cpu_to_le32(header.num_gtes_per_gte); | |
8979b227 FB |
1318 | header.desc_offset = cpu_to_le64(header.desc_offset); |
1319 | header.desc_size = cpu_to_le64(header.desc_size); | |
1320 | header.rgd_offset = cpu_to_le64(header.rgd_offset); | |
1321 | header.gd_offset = cpu_to_le64(header.gd_offset); | |
1322 | header.grain_offset = cpu_to_le64(header.grain_offset); | |
6c031aac | 1323 | header.compressAlgorithm = cpu_to_le16(header.compressAlgorithm); |
8979b227 FB |
1324 | |
1325 | header.check_bytes[0] = 0xa; | |
1326 | header.check_bytes[1] = 0x20; | |
1327 | header.check_bytes[2] = 0xd; | |
1328 | header.check_bytes[3] = 0xa; | |
3b46e624 TS |
1329 | |
1330 | /* write all the data */ | |
1640366c KS |
1331 | ret = qemu_write_full(fd, &magic, sizeof(magic)); |
1332 | if (ret != sizeof(magic)) { | |
b781cce5 | 1333 | ret = -errno; |
1640366c KS |
1334 | goto exit; |
1335 | } | |
1336 | ret = qemu_write_full(fd, &header, sizeof(header)); | |
1337 | if (ret != sizeof(header)) { | |
b781cce5 | 1338 | ret = -errno; |
1640366c KS |
1339 | goto exit; |
1340 | } | |
8979b227 | 1341 | |
16372ff0 | 1342 | ret = ftruncate(fd, le64_to_cpu(header.grain_offset) << 9); |
1640366c | 1343 | if (ret < 0) { |
b781cce5 | 1344 | ret = -errno; |
1640366c KS |
1345 | goto exit; |
1346 | } | |
8979b227 FB |
1347 | |
1348 | /* write grain directory */ | |
1349 | lseek(fd, le64_to_cpu(header.rgd_offset) << 9, SEEK_SET); | |
16372ff0 | 1350 | for (i = 0, tmp = le64_to_cpu(header.rgd_offset) + gd_size; |
1640366c KS |
1351 | i < gt_count; i++, tmp += gt_size) { |
1352 | ret = qemu_write_full(fd, &tmp, sizeof(tmp)); | |
1353 | if (ret != sizeof(tmp)) { | |
b781cce5 | 1354 | ret = -errno; |
1640366c KS |
1355 | goto exit; |
1356 | } | |
1357 | } | |
3b46e624 | 1358 | |
8979b227 FB |
1359 | /* write backup grain directory */ |
1360 | lseek(fd, le64_to_cpu(header.gd_offset) << 9, SEEK_SET); | |
16372ff0 | 1361 | for (i = 0, tmp = le64_to_cpu(header.gd_offset) + gd_size; |
1640366c KS |
1362 | i < gt_count; i++, tmp += gt_size) { |
1363 | ret = qemu_write_full(fd, &tmp, sizeof(tmp)); | |
1364 | if (ret != sizeof(tmp)) { | |
b781cce5 | 1365 | ret = -errno; |
1640366c KS |
1366 | goto exit; |
1367 | } | |
1368 | } | |
8979b227 | 1369 | |
f66fd6c3 FZ |
1370 | ret = 0; |
1371 | exit: | |
2e1e79da | 1372 | qemu_close(fd); |
f66fd6c3 FZ |
1373 | return ret; |
1374 | } | |
1375 | ||
1376 | static int filename_decompose(const char *filename, char *path, char *prefix, | |
1377 | char *postfix, size_t buf_len) | |
1378 | { | |
1379 | const char *p, *q; | |
1380 | ||
1381 | if (filename == NULL || !strlen(filename)) { | |
1382 | fprintf(stderr, "Vmdk: no filename provided.\n"); | |
65f74725 | 1383 | return VMDK_ERROR; |
f66fd6c3 FZ |
1384 | } |
1385 | p = strrchr(filename, '/'); | |
1386 | if (p == NULL) { | |
1387 | p = strrchr(filename, '\\'); | |
1388 | } | |
1389 | if (p == NULL) { | |
1390 | p = strrchr(filename, ':'); | |
1391 | } | |
1392 | if (p != NULL) { | |
1393 | p++; | |
1394 | if (p - filename >= buf_len) { | |
65f74725 | 1395 | return VMDK_ERROR; |
f66fd6c3 FZ |
1396 | } |
1397 | pstrcpy(path, p - filename + 1, filename); | |
1398 | } else { | |
1399 | p = filename; | |
1400 | path[0] = '\0'; | |
1401 | } | |
1402 | q = strrchr(p, '.'); | |
1403 | if (q == NULL) { | |
1404 | pstrcpy(prefix, buf_len, p); | |
1405 | postfix[0] = '\0'; | |
1406 | } else { | |
1407 | if (q - p >= buf_len) { | |
65f74725 | 1408 | return VMDK_ERROR; |
f66fd6c3 FZ |
1409 | } |
1410 | pstrcpy(prefix, q - p + 1, p); | |
1411 | pstrcpy(postfix, buf_len, q); | |
1412 | } | |
65f74725 | 1413 | return VMDK_OK; |
f66fd6c3 FZ |
1414 | } |
1415 | ||
1416 | static int relative_path(char *dest, int dest_size, | |
1417 | const char *base, const char *target) | |
1418 | { | |
1419 | int i = 0; | |
1420 | int n = 0; | |
1421 | const char *p, *q; | |
1422 | #ifdef _WIN32 | |
1423 | const char *sep = "\\"; | |
1424 | #else | |
1425 | const char *sep = "/"; | |
1426 | #endif | |
1427 | ||
1428 | if (!(dest && base && target)) { | |
65f74725 | 1429 | return VMDK_ERROR; |
f66fd6c3 FZ |
1430 | } |
1431 | if (path_is_absolute(target)) { | |
d66f8e7b | 1432 | pstrcpy(dest, dest_size, target); |
65f74725 | 1433 | return VMDK_OK; |
f66fd6c3 FZ |
1434 | } |
1435 | while (base[i] == target[i]) { | |
1436 | i++; | |
1437 | } | |
1438 | p = &base[i]; | |
1439 | q = &target[i]; | |
1440 | while (*p) { | |
1441 | if (*p == *sep) { | |
1442 | n++; | |
1443 | } | |
1444 | p++; | |
1445 | } | |
1446 | dest[0] = '\0'; | |
1447 | for (; n; n--) { | |
1448 | pstrcat(dest, dest_size, ".."); | |
1449 | pstrcat(dest, dest_size, sep); | |
1450 | } | |
1451 | pstrcat(dest, dest_size, q); | |
65f74725 | 1452 | return VMDK_OK; |
f66fd6c3 FZ |
1453 | } |
1454 | ||
1455 | static int vmdk_create(const char *filename, QEMUOptionParameter *options) | |
1456 | { | |
1457 | int fd, idx = 0; | |
1458 | char desc[BUF_SIZE]; | |
1459 | int64_t total_size = 0, filesize; | |
7f2039f6 | 1460 | const char *adapter_type = NULL; |
f66fd6c3 FZ |
1461 | const char *backing_file = NULL; |
1462 | const char *fmt = NULL; | |
1463 | int flags = 0; | |
1464 | int ret = 0; | |
6c031aac | 1465 | bool flat, split, compress; |
f66fd6c3 FZ |
1466 | char ext_desc_lines[BUF_SIZE] = ""; |
1467 | char path[PATH_MAX], prefix[PATH_MAX], postfix[PATH_MAX]; | |
1468 | const int64_t split_size = 0x80000000; /* VMDK has constant split size */ | |
1469 | const char *desc_extent_line; | |
1470 | char parent_desc_line[BUF_SIZE] = ""; | |
1471 | uint32_t parent_cid = 0xffffffff; | |
7f2039f6 | 1472 | uint32_t number_heads = 16; |
69e0b6df | 1473 | bool zeroed_grain = false; |
f66fd6c3 FZ |
1474 | const char desc_template[] = |
1475 | "# Disk DescriptorFile\n" | |
1476 | "version=1\n" | |
1477 | "CID=%x\n" | |
1478 | "parentCID=%x\n" | |
1479 | "createType=\"%s\"\n" | |
1480 | "%s" | |
1481 | "\n" | |
1482 | "# Extent description\n" | |
1483 | "%s" | |
1484 | "\n" | |
1485 | "# The Disk Data Base\n" | |
1486 | "#DDB\n" | |
1487 | "\n" | |
1488 | "ddb.virtualHWVersion = \"%d\"\n" | |
1489 | "ddb.geometry.cylinders = \"%" PRId64 "\"\n" | |
7f2039f6 | 1490 | "ddb.geometry.heads = \"%d\"\n" |
f66fd6c3 | 1491 | "ddb.geometry.sectors = \"63\"\n" |
7f2039f6 | 1492 | "ddb.adapterType = \"%s\"\n"; |
f66fd6c3 FZ |
1493 | |
1494 | if (filename_decompose(filename, path, prefix, postfix, PATH_MAX)) { | |
1495 | return -EINVAL; | |
1496 | } | |
1497 | /* Read out options */ | |
1498 | while (options && options->name) { | |
1499 | if (!strcmp(options->name, BLOCK_OPT_SIZE)) { | |
1500 | total_size = options->value.n; | |
7f2039f6 OP |
1501 | } else if (!strcmp(options->name, BLOCK_OPT_ADAPTER_TYPE)) { |
1502 | adapter_type = options->value.s; | |
f66fd6c3 FZ |
1503 | } else if (!strcmp(options->name, BLOCK_OPT_BACKING_FILE)) { |
1504 | backing_file = options->value.s; | |
1505 | } else if (!strcmp(options->name, BLOCK_OPT_COMPAT6)) { | |
1506 | flags |= options->value.n ? BLOCK_FLAG_COMPAT6 : 0; | |
1507 | } else if (!strcmp(options->name, BLOCK_OPT_SUBFMT)) { | |
1508 | fmt = options->value.s; | |
69e0b6df FZ |
1509 | } else if (!strcmp(options->name, BLOCK_OPT_ZEROED_GRAIN)) { |
1510 | zeroed_grain |= options->value.n; | |
f66fd6c3 FZ |
1511 | } |
1512 | options++; | |
1513 | } | |
7f2039f6 OP |
1514 | if (!adapter_type) { |
1515 | adapter_type = "ide"; | |
1516 | } else if (strcmp(adapter_type, "ide") && | |
1517 | strcmp(adapter_type, "buslogic") && | |
1518 | strcmp(adapter_type, "lsilogic") && | |
1519 | strcmp(adapter_type, "legacyESX")) { | |
1520 | fprintf(stderr, "VMDK: Unknown adapter type: '%s'.\n", adapter_type); | |
1521 | return -EINVAL; | |
1522 | } | |
1523 | if (strcmp(adapter_type, "ide") != 0) { | |
1524 | /* that's the number of heads with which vmware operates when | |
1525 | creating, exporting, etc. vmdk files with a non-ide adapter type */ | |
1526 | number_heads = 255; | |
1527 | } | |
f66fd6c3 FZ |
1528 | if (!fmt) { |
1529 | /* Default format to monolithicSparse */ | |
1530 | fmt = "monolithicSparse"; | |
1531 | } else if (strcmp(fmt, "monolithicFlat") && | |
1532 | strcmp(fmt, "monolithicSparse") && | |
1533 | strcmp(fmt, "twoGbMaxExtentSparse") && | |
6c031aac FZ |
1534 | strcmp(fmt, "twoGbMaxExtentFlat") && |
1535 | strcmp(fmt, "streamOptimized")) { | |
f66fd6c3 FZ |
1536 | fprintf(stderr, "VMDK: Unknown subformat: %s\n", fmt); |
1537 | return -EINVAL; | |
1538 | } | |
1539 | split = !(strcmp(fmt, "twoGbMaxExtentFlat") && | |
1540 | strcmp(fmt, "twoGbMaxExtentSparse")); | |
1541 | flat = !(strcmp(fmt, "monolithicFlat") && | |
1542 | strcmp(fmt, "twoGbMaxExtentFlat")); | |
6c031aac | 1543 | compress = !strcmp(fmt, "streamOptimized"); |
f66fd6c3 FZ |
1544 | if (flat) { |
1545 | desc_extent_line = "RW %lld FLAT \"%s\" 0\n"; | |
1546 | } else { | |
1547 | desc_extent_line = "RW %lld SPARSE \"%s\"\n"; | |
1548 | } | |
1549 | if (flat && backing_file) { | |
1550 | /* not supporting backing file for flat image */ | |
1551 | return -ENOTSUP; | |
1552 | } | |
1553 | if (backing_file) { | |
1554 | char parent_filename[PATH_MAX]; | |
1555 | BlockDriverState *bs = bdrv_new(""); | |
de9c0cec | 1556 | ret = bdrv_open(bs, backing_file, NULL, 0, NULL); |
f66fd6c3 FZ |
1557 | if (ret != 0) { |
1558 | bdrv_delete(bs); | |
1559 | return ret; | |
1560 | } | |
1561 | if (strcmp(bs->drv->format_name, "vmdk")) { | |
1562 | bdrv_delete(bs); | |
1563 | return -EINVAL; | |
1564 | } | |
f66fd6c3 FZ |
1565 | parent_cid = vmdk_read_cid(bs, 0); |
1566 | bdrv_delete(bs); | |
1567 | relative_path(parent_filename, sizeof(parent_filename), | |
1568 | filename, backing_file); | |
1569 | snprintf(parent_desc_line, sizeof(parent_desc_line), | |
1570 | "parentFileNameHint=\"%s\"", parent_filename); | |
1571 | } | |
1572 | ||
1573 | /* Create extents */ | |
1574 | filesize = total_size; | |
1575 | while (filesize > 0) { | |
1576 | char desc_line[BUF_SIZE]; | |
1577 | char ext_filename[PATH_MAX]; | |
1578 | char desc_filename[PATH_MAX]; | |
1579 | int64_t size = filesize; | |
1580 | ||
1581 | if (split && size > split_size) { | |
1582 | size = split_size; | |
1583 | } | |
1584 | if (split) { | |
1585 | snprintf(desc_filename, sizeof(desc_filename), "%s-%c%03d%s", | |
1586 | prefix, flat ? 'f' : 's', ++idx, postfix); | |
1587 | } else if (flat) { | |
1588 | snprintf(desc_filename, sizeof(desc_filename), "%s-flat%s", | |
1589 | prefix, postfix); | |
1590 | } else { | |
1591 | snprintf(desc_filename, sizeof(desc_filename), "%s%s", | |
1592 | prefix, postfix); | |
1593 | } | |
1594 | snprintf(ext_filename, sizeof(ext_filename), "%s%s", | |
1595 | path, desc_filename); | |
1596 | ||
69e0b6df FZ |
1597 | if (vmdk_create_extent(ext_filename, size, |
1598 | flat, compress, zeroed_grain)) { | |
f66fd6c3 FZ |
1599 | return -EINVAL; |
1600 | } | |
1601 | filesize -= size; | |
1602 | ||
1603 | /* Format description line */ | |
1604 | snprintf(desc_line, sizeof(desc_line), | |
1605 | desc_extent_line, size / 512, desc_filename); | |
1606 | pstrcat(ext_desc_lines, sizeof(ext_desc_lines), desc_line); | |
1607 | } | |
1608 | /* generate descriptor file */ | |
1609 | snprintf(desc, sizeof(desc), desc_template, | |
1610 | (unsigned int)time(NULL), | |
1611 | parent_cid, | |
1612 | fmt, | |
1613 | parent_desc_line, | |
1614 | ext_desc_lines, | |
1615 | (flags & BLOCK_FLAG_COMPAT6 ? 6 : 4), | |
7f2039f6 OP |
1616 | total_size / (int64_t)(63 * number_heads * 512), number_heads, |
1617 | adapter_type); | |
f66fd6c3 | 1618 | if (split || flat) { |
6165f4d8 CB |
1619 | fd = qemu_open(filename, |
1620 | O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE, | |
1621 | 0644); | |
f66fd6c3 | 1622 | } else { |
6165f4d8 CB |
1623 | fd = qemu_open(filename, |
1624 | O_WRONLY | O_BINARY | O_LARGEFILE, | |
1625 | 0644); | |
f66fd6c3 FZ |
1626 | } |
1627 | if (fd < 0) { | |
1628 | return -errno; | |
1629 | } | |
1630 | /* the descriptor offset = 0x200 */ | |
1631 | if (!split && !flat && 0x200 != lseek(fd, 0x200, SEEK_SET)) { | |
1632 | ret = -errno; | |
1633 | goto exit; | |
1634 | } | |
1640366c KS |
1635 | ret = qemu_write_full(fd, desc, strlen(desc)); |
1636 | if (ret != strlen(desc)) { | |
b781cce5 | 1637 | ret = -errno; |
1640366c KS |
1638 | goto exit; |
1639 | } | |
1640366c KS |
1640 | ret = 0; |
1641 | exit: | |
2e1e79da | 1642 | qemu_close(fd); |
1640366c | 1643 | return ret; |
8979b227 FB |
1644 | } |
1645 | ||
e2731add | 1646 | static void vmdk_close(BlockDriverState *bs) |
ea2384d3 | 1647 | { |
2bc3166c KW |
1648 | BDRVVmdkState *s = bs->opaque; |
1649 | ||
b3976d3c | 1650 | vmdk_free_extents(bs); |
2bc3166c KW |
1651 | |
1652 | migrate_del_blocker(s->migration_blocker); | |
1653 | error_free(s->migration_blocker); | |
ea2384d3 FB |
1654 | } |
1655 | ||
8b94ff85 | 1656 | static coroutine_fn int vmdk_co_flush(BlockDriverState *bs) |
7a6cba61 | 1657 | { |
333c574d | 1658 | BDRVVmdkState *s = bs->opaque; |
29cdb251 PB |
1659 | int i, err; |
1660 | int ret = 0; | |
333c574d | 1661 | |
333c574d | 1662 | for (i = 0; i < s->num_extents; i++) { |
8b94ff85 | 1663 | err = bdrv_co_flush(s->extents[i].file); |
333c574d FZ |
1664 | if (err < 0) { |
1665 | ret = err; | |
1666 | } | |
1667 | } | |
1668 | return ret; | |
7a6cba61 PB |
1669 | } |
1670 | ||
4a1d5e1f FZ |
1671 | static int64_t vmdk_get_allocated_file_size(BlockDriverState *bs) |
1672 | { | |
1673 | int i; | |
1674 | int64_t ret = 0; | |
1675 | int64_t r; | |
1676 | BDRVVmdkState *s = bs->opaque; | |
1677 | ||
1678 | ret = bdrv_get_allocated_file_size(bs->file); | |
1679 | if (ret < 0) { | |
1680 | return ret; | |
1681 | } | |
1682 | for (i = 0; i < s->num_extents; i++) { | |
1683 | if (s->extents[i].file == bs->file) { | |
1684 | continue; | |
1685 | } | |
1686 | r = bdrv_get_allocated_file_size(s->extents[i].file); | |
1687 | if (r < 0) { | |
1688 | return r; | |
1689 | } | |
1690 | ret += r; | |
1691 | } | |
1692 | return ret; | |
1693 | } | |
0e7e1989 KW |
1694 | |
1695 | static QEMUOptionParameter vmdk_create_options[] = { | |
db08adf5 KW |
1696 | { |
1697 | .name = BLOCK_OPT_SIZE, | |
1698 | .type = OPT_SIZE, | |
1699 | .help = "Virtual disk size" | |
1700 | }, | |
7f2039f6 OP |
1701 | { |
1702 | .name = BLOCK_OPT_ADAPTER_TYPE, | |
1703 | .type = OPT_STRING, | |
1704 | .help = "Virtual adapter type, can be one of " | |
1705 | "ide (default), lsilogic, buslogic or legacyESX" | |
1706 | }, | |
db08adf5 KW |
1707 | { |
1708 | .name = BLOCK_OPT_BACKING_FILE, | |
1709 | .type = OPT_STRING, | |
1710 | .help = "File name of a base image" | |
1711 | }, | |
1712 | { | |
1713 | .name = BLOCK_OPT_COMPAT6, | |
1714 | .type = OPT_FLAG, | |
1715 | .help = "VMDK version 6 image" | |
1716 | }, | |
f66fd6c3 FZ |
1717 | { |
1718 | .name = BLOCK_OPT_SUBFMT, | |
1719 | .type = OPT_STRING, | |
1720 | .help = | |
1721 | "VMDK flat extent format, can be one of " | |
6c031aac | 1722 | "{monolithicSparse (default) | monolithicFlat | twoGbMaxExtentSparse | twoGbMaxExtentFlat | streamOptimized} " |
f66fd6c3 | 1723 | }, |
69e0b6df FZ |
1724 | { |
1725 | .name = BLOCK_OPT_ZEROED_GRAIN, | |
1726 | .type = OPT_FLAG, | |
1727 | .help = "Enable efficient zero writes using the zeroed-grain GTE feature" | |
1728 | }, | |
0e7e1989 KW |
1729 | { NULL } |
1730 | }; | |
1731 | ||
5efa9d5a | 1732 | static BlockDriver bdrv_vmdk = { |
ae261c86 FZ |
1733 | .format_name = "vmdk", |
1734 | .instance_size = sizeof(BDRVVmdkState), | |
1735 | .bdrv_probe = vmdk_probe, | |
6511ef77 | 1736 | .bdrv_open = vmdk_open, |
3897575f | 1737 | .bdrv_reopen_prepare = vmdk_reopen_prepare, |
2914caa0 | 1738 | .bdrv_read = vmdk_co_read, |
e183ef75 | 1739 | .bdrv_write = vmdk_co_write, |
ae261c86 FZ |
1740 | .bdrv_close = vmdk_close, |
1741 | .bdrv_create = vmdk_create, | |
c68b89ac | 1742 | .bdrv_co_flush_to_disk = vmdk_co_flush, |
f8a2e5e3 | 1743 | .bdrv_co_is_allocated = vmdk_co_is_allocated, |
4a1d5e1f | 1744 | .bdrv_get_allocated_file_size = vmdk_get_allocated_file_size, |
0e7e1989 KW |
1745 | |
1746 | .create_options = vmdk_create_options, | |
ea2384d3 | 1747 | }; |
5efa9d5a AL |
1748 | |
1749 | static void bdrv_vmdk_init(void) | |
1750 | { | |
1751 | bdrv_register(&bdrv_vmdk); | |
1752 | } | |
1753 | ||
1754 | block_init(bdrv_vmdk_init); |