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