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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; | |
5d8caa54 | 65 | } QEMU_PACKED VMDK3Header; |
ea2384d3 FB |
66 | |
67 | typedef struct { | |
68 | uint32_t version; | |
69 | uint32_t flags; | |
e98768d4 FZ |
70 | uint64_t capacity; |
71 | uint64_t granularity; | |
72 | uint64_t desc_offset; | |
73 | uint64_t desc_size; | |
ca8804ce FZ |
74 | /* Number of GrainTableEntries per GrainTable */ |
75 | uint32_t num_gtes_per_gt; | |
e98768d4 FZ |
76 | uint64_t rgd_offset; |
77 | uint64_t gd_offset; | |
78 | uint64_t grain_offset; | |
ea2384d3 FB |
79 | char filler[1]; |
80 | char check_bytes[4]; | |
432bb170 | 81 | uint16_t compressAlgorithm; |
541dc0d4 | 82 | } QEMU_PACKED VMDK4Header; |
ea2384d3 FB |
83 | |
84 | #define L2_CACHE_SIZE 16 | |
85 | ||
b3976d3c FZ |
86 | typedef struct VmdkExtent { |
87 | BlockDriverState *file; | |
88 | bool flat; | |
432bb170 FZ |
89 | bool compressed; |
90 | bool has_marker; | |
14ead646 FZ |
91 | bool has_zero_grain; |
92 | int version; | |
b3976d3c FZ |
93 | int64_t sectors; |
94 | int64_t end_sector; | |
7fa60fa3 | 95 | int64_t flat_start_offset; |
ea2384d3 | 96 | int64_t l1_table_offset; |
ff1afc72 | 97 | int64_t l1_backup_table_offset; |
ea2384d3 | 98 | uint32_t *l1_table; |
ff1afc72 | 99 | uint32_t *l1_backup_table; |
ea2384d3 FB |
100 | unsigned int l1_size; |
101 | uint32_t l1_entry_sectors; | |
102 | ||
103 | unsigned int l2_size; | |
104 | uint32_t *l2_cache; | |
105 | uint32_t l2_cache_offsets[L2_CACHE_SIZE]; | |
106 | uint32_t l2_cache_counts[L2_CACHE_SIZE]; | |
107 | ||
301c7d38 | 108 | int64_t cluster_sectors; |
f4c129a3 | 109 | char *type; |
b3976d3c FZ |
110 | } VmdkExtent; |
111 | ||
112 | typedef struct BDRVVmdkState { | |
848c66e8 | 113 | CoMutex lock; |
e98768d4 | 114 | uint64_t desc_offset; |
69b4d86d | 115 | bool cid_updated; |
c338b6ad | 116 | bool cid_checked; |
f4c129a3 | 117 | uint32_t cid; |
5f4da8c0 | 118 | uint32_t parent_cid; |
b3976d3c FZ |
119 | int num_extents; |
120 | /* Extent array with num_extents entries, ascend ordered by address */ | |
121 | VmdkExtent *extents; | |
2bc3166c | 122 | Error *migration_blocker; |
f4c129a3 | 123 | char *create_type; |
ea2384d3 FB |
124 | } BDRVVmdkState; |
125 | ||
630530a6 TS |
126 | typedef struct VmdkMetaData { |
127 | uint32_t offset; | |
128 | unsigned int l1_index; | |
129 | unsigned int l2_index; | |
130 | unsigned int l2_offset; | |
131 | int valid; | |
cdeaf1f1 | 132 | uint32_t *l2_cache_entry; |
630530a6 TS |
133 | } VmdkMetaData; |
134 | ||
432bb170 FZ |
135 | typedef struct VmdkGrainMarker { |
136 | uint64_t lba; | |
137 | uint32_t size; | |
138 | uint8_t data[0]; | |
5d8caa54 | 139 | } QEMU_PACKED VmdkGrainMarker; |
432bb170 | 140 | |
65bd155c KW |
141 | enum { |
142 | MARKER_END_OF_STREAM = 0, | |
143 | MARKER_GRAIN_TABLE = 1, | |
144 | MARKER_GRAIN_DIRECTORY = 2, | |
145 | MARKER_FOOTER = 3, | |
146 | }; | |
147 | ||
ea2384d3 FB |
148 | static int vmdk_probe(const uint8_t *buf, int buf_size, const char *filename) |
149 | { | |
150 | uint32_t magic; | |
151 | ||
ae261c86 | 152 | if (buf_size < 4) { |
ea2384d3 | 153 | return 0; |
ae261c86 | 154 | } |
ea2384d3 FB |
155 | magic = be32_to_cpu(*(uint32_t *)buf); |
156 | if (magic == VMDK3_MAGIC || | |
01fc99d6 | 157 | magic == VMDK4_MAGIC) { |
ea2384d3 | 158 | return 100; |
01fc99d6 FZ |
159 | } else { |
160 | const char *p = (const char *)buf; | |
161 | const char *end = p + buf_size; | |
162 | while (p < end) { | |
163 | if (*p == '#') { | |
164 | /* skip comment line */ | |
165 | while (p < end && *p != '\n') { | |
166 | p++; | |
167 | } | |
168 | p++; | |
169 | continue; | |
170 | } | |
171 | if (*p == ' ') { | |
172 | while (p < end && *p == ' ') { | |
173 | p++; | |
174 | } | |
175 | /* skip '\r' if windows line endings used. */ | |
176 | if (p < end && *p == '\r') { | |
177 | p++; | |
178 | } | |
179 | /* only accept blank lines before 'version=' line */ | |
180 | if (p == end || *p != '\n') { | |
181 | return 0; | |
182 | } | |
183 | p++; | |
184 | continue; | |
185 | } | |
186 | if (end - p >= strlen("version=X\n")) { | |
187 | if (strncmp("version=1\n", p, strlen("version=1\n")) == 0 || | |
188 | strncmp("version=2\n", p, strlen("version=2\n")) == 0) { | |
189 | return 100; | |
190 | } | |
191 | } | |
192 | if (end - p >= strlen("version=X\r\n")) { | |
193 | if (strncmp("version=1\r\n", p, strlen("version=1\r\n")) == 0 || | |
194 | strncmp("version=2\r\n", p, strlen("version=2\r\n")) == 0) { | |
195 | return 100; | |
196 | } | |
197 | } | |
198 | return 0; | |
199 | } | |
ea2384d3 | 200 | return 0; |
01fc99d6 | 201 | } |
ea2384d3 FB |
202 | } |
203 | ||
3b46e624 | 204 | #define SECTOR_SIZE 512 |
f66fd6c3 FZ |
205 | #define DESC_SIZE (20 * SECTOR_SIZE) /* 20 sectors of 512 bytes each */ |
206 | #define BUF_SIZE 4096 | |
207 | #define HEADER_SIZE 512 /* first sector of 512 bytes */ | |
5f4da8c0 | 208 | |
b3976d3c FZ |
209 | static void vmdk_free_extents(BlockDriverState *bs) |
210 | { | |
211 | int i; | |
212 | BDRVVmdkState *s = bs->opaque; | |
b3c0bfb6 | 213 | VmdkExtent *e; |
b3976d3c FZ |
214 | |
215 | for (i = 0; i < s->num_extents; i++) { | |
b3c0bfb6 FZ |
216 | e = &s->extents[i]; |
217 | g_free(e->l1_table); | |
218 | g_free(e->l2_cache); | |
219 | g_free(e->l1_backup_table); | |
f4c129a3 | 220 | g_free(e->type); |
b3c0bfb6 | 221 | if (e->file != bs->file) { |
4f6fd349 | 222 | bdrv_unref(e->file); |
b3c0bfb6 | 223 | } |
b3976d3c | 224 | } |
7267c094 | 225 | g_free(s->extents); |
b3976d3c FZ |
226 | } |
227 | ||
86c6b429 FZ |
228 | static void vmdk_free_last_extent(BlockDriverState *bs) |
229 | { | |
230 | BDRVVmdkState *s = bs->opaque; | |
231 | ||
232 | if (s->num_extents == 0) { | |
233 | return; | |
234 | } | |
235 | s->num_extents--; | |
236 | s->extents = g_realloc(s->extents, s->num_extents * sizeof(VmdkExtent)); | |
237 | } | |
238 | ||
5f4da8c0 | 239 | static uint32_t vmdk_read_cid(BlockDriverState *bs, int parent) |
ea2384d3 | 240 | { |
5f4da8c0 | 241 | char desc[DESC_SIZE]; |
8379e46d | 242 | uint32_t cid = 0xffffffff; |
7ccfb2eb | 243 | const char *p_name, *cid_str; |
5f4da8c0 | 244 | size_t cid_str_size; |
e1da9b24 | 245 | BDRVVmdkState *s = bs->opaque; |
99f1835d | 246 | int ret; |
5f4da8c0 | 247 | |
99f1835d KW |
248 | ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE); |
249 | if (ret < 0) { | |
5f4da8c0 | 250 | return 0; |
e1da9b24 | 251 | } |
5f4da8c0 TS |
252 | |
253 | if (parent) { | |
254 | cid_str = "parentCID"; | |
255 | cid_str_size = sizeof("parentCID"); | |
256 | } else { | |
257 | cid_str = "CID"; | |
258 | cid_str_size = sizeof("CID"); | |
259 | } | |
260 | ||
93897b9f | 261 | desc[DESC_SIZE - 1] = '\0'; |
ae261c86 FZ |
262 | p_name = strstr(desc, cid_str); |
263 | if (p_name != NULL) { | |
5f4da8c0 | 264 | p_name += cid_str_size; |
ae261c86 | 265 | sscanf(p_name, "%x", &cid); |
5f4da8c0 TS |
266 | } |
267 | ||
268 | return cid; | |
269 | } | |
270 | ||
271 | static int vmdk_write_cid(BlockDriverState *bs, uint32_t cid) | |
272 | { | |
5f4da8c0 TS |
273 | char desc[DESC_SIZE], tmp_desc[DESC_SIZE]; |
274 | char *p_name, *tmp_str; | |
e1da9b24 | 275 | BDRVVmdkState *s = bs->opaque; |
99f1835d | 276 | int ret; |
5f4da8c0 | 277 | |
99f1835d KW |
278 | ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE); |
279 | if (ret < 0) { | |
280 | return ret; | |
e1da9b24 | 281 | } |
5f4da8c0 | 282 | |
93897b9f | 283 | desc[DESC_SIZE - 1] = '\0'; |
ae261c86 | 284 | tmp_str = strstr(desc, "parentCID"); |
93897b9f KW |
285 | if (tmp_str == NULL) { |
286 | return -EINVAL; | |
287 | } | |
288 | ||
363a37d5 | 289 | pstrcpy(tmp_desc, sizeof(tmp_desc), tmp_str); |
ae261c86 FZ |
290 | p_name = strstr(desc, "CID"); |
291 | if (p_name != NULL) { | |
5f4da8c0 | 292 | p_name += sizeof("CID"); |
363a37d5 BS |
293 | snprintf(p_name, sizeof(desc) - (p_name - desc), "%x\n", cid); |
294 | pstrcat(desc, sizeof(desc), tmp_desc); | |
5f4da8c0 TS |
295 | } |
296 | ||
99f1835d KW |
297 | ret = bdrv_pwrite_sync(bs->file, s->desc_offset, desc, DESC_SIZE); |
298 | if (ret < 0) { | |
299 | return ret; | |
e1da9b24 | 300 | } |
99f1835d | 301 | |
5f4da8c0 TS |
302 | return 0; |
303 | } | |
304 | ||
305 | static int vmdk_is_cid_valid(BlockDriverState *bs) | |
306 | { | |
5f4da8c0 | 307 | BDRVVmdkState *s = bs->opaque; |
b171271a | 308 | BlockDriverState *p_bs = bs->backing_hd; |
5f4da8c0 TS |
309 | uint32_t cur_pcid; |
310 | ||
c338b6ad | 311 | if (!s->cid_checked && p_bs) { |
ae261c86 FZ |
312 | cur_pcid = vmdk_read_cid(p_bs, 0); |
313 | if (s->parent_cid != cur_pcid) { | |
314 | /* CID not valid */ | |
5f4da8c0 | 315 | return 0; |
ae261c86 | 316 | } |
5f4da8c0 | 317 | } |
c338b6ad | 318 | s->cid_checked = true; |
ae261c86 | 319 | /* CID valid */ |
5f4da8c0 TS |
320 | return 1; |
321 | } | |
322 | ||
3897575f JC |
323 | /* Queue extents, if any, for reopen() */ |
324 | static int vmdk_reopen_prepare(BDRVReopenState *state, | |
325 | BlockReopenQueue *queue, Error **errp) | |
326 | { | |
327 | BDRVVmdkState *s; | |
328 | int ret = -1; | |
329 | int i; | |
330 | VmdkExtent *e; | |
331 | ||
332 | assert(state != NULL); | |
333 | assert(state->bs != NULL); | |
334 | ||
335 | if (queue == NULL) { | |
4823970b | 336 | error_setg(errp, "No reopen queue for VMDK extents"); |
3897575f JC |
337 | goto exit; |
338 | } | |
339 | ||
340 | s = state->bs->opaque; | |
341 | ||
342 | assert(s != NULL); | |
343 | ||
344 | for (i = 0; i < s->num_extents; i++) { | |
345 | e = &s->extents[i]; | |
346 | if (e->file != state->bs->file) { | |
347 | bdrv_reopen_queue(queue, e->file, state->flags); | |
348 | } | |
349 | } | |
350 | ret = 0; | |
351 | ||
352 | exit: | |
353 | return ret; | |
354 | } | |
355 | ||
9949f97e | 356 | static int vmdk_parent_open(BlockDriverState *bs) |
5f4da8c0 | 357 | { |
5fafdf24 | 358 | char *p_name; |
7fa60fa3 | 359 | char desc[DESC_SIZE + 1]; |
e1da9b24 | 360 | BDRVVmdkState *s = bs->opaque; |
588b65a3 | 361 | int ret; |
5f4da8c0 | 362 | |
7fa60fa3 | 363 | desc[DESC_SIZE] = '\0'; |
588b65a3 PB |
364 | ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE); |
365 | if (ret < 0) { | |
366 | return ret; | |
e1da9b24 | 367 | } |
5f4da8c0 | 368 | |
ae261c86 FZ |
369 | p_name = strstr(desc, "parentFileNameHint"); |
370 | if (p_name != NULL) { | |
5f4da8c0 | 371 | char *end_name; |
5f4da8c0 TS |
372 | |
373 | p_name += sizeof("parentFileNameHint") + 1; | |
ae261c86 FZ |
374 | end_name = strchr(p_name, '\"'); |
375 | if (end_name == NULL) { | |
588b65a3 | 376 | return -EINVAL; |
ae261c86 FZ |
377 | } |
378 | if ((end_name - p_name) > sizeof(bs->backing_file) - 1) { | |
588b65a3 | 379 | return -EINVAL; |
ae261c86 | 380 | } |
3b46e624 | 381 | |
b171271a | 382 | pstrcpy(bs->backing_file, end_name - p_name + 1, p_name); |
ff1afc72 | 383 | } |
5f4da8c0 TS |
384 | |
385 | return 0; | |
386 | } | |
387 | ||
b3976d3c FZ |
388 | /* Create and append extent to the extent array. Return the added VmdkExtent |
389 | * address. return NULL if allocation failed. */ | |
8aa1331c | 390 | static int vmdk_add_extent(BlockDriverState *bs, |
b3976d3c FZ |
391 | BlockDriverState *file, bool flat, int64_t sectors, |
392 | int64_t l1_offset, int64_t l1_backup_offset, | |
393 | uint32_t l1_size, | |
8aa1331c | 394 | int l2_size, uint64_t cluster_sectors, |
4823970b FZ |
395 | VmdkExtent **new_extent, |
396 | Error **errp) | |
b3976d3c FZ |
397 | { |
398 | VmdkExtent *extent; | |
399 | BDRVVmdkState *s = bs->opaque; | |
400 | ||
8aa1331c FZ |
401 | if (cluster_sectors > 0x200000) { |
402 | /* 0x200000 * 512Bytes = 1GB for one cluster is unrealistic */ | |
4823970b FZ |
403 | error_setg(errp, "Invalid granularity, image may be corrupt"); |
404 | return -EFBIG; | |
8aa1331c | 405 | } |
b0651b8c FZ |
406 | if (l1_size > 512 * 1024 * 1024) { |
407 | /* Although with big capacity and small l1_entry_sectors, we can get a | |
408 | * big l1_size, we don't want unbounded value to allocate the table. | |
409 | * Limit it to 512M, which is 16PB for default cluster and L2 table | |
410 | * size */ | |
4823970b | 411 | error_setg(errp, "L1 size too big"); |
b0651b8c FZ |
412 | return -EFBIG; |
413 | } | |
8aa1331c | 414 | |
7267c094 | 415 | s->extents = g_realloc(s->extents, |
b3976d3c FZ |
416 | (s->num_extents + 1) * sizeof(VmdkExtent)); |
417 | extent = &s->extents[s->num_extents]; | |
418 | s->num_extents++; | |
419 | ||
420 | memset(extent, 0, sizeof(VmdkExtent)); | |
421 | extent->file = file; | |
422 | extent->flat = flat; | |
423 | extent->sectors = sectors; | |
424 | extent->l1_table_offset = l1_offset; | |
425 | extent->l1_backup_table_offset = l1_backup_offset; | |
426 | extent->l1_size = l1_size; | |
427 | extent->l1_entry_sectors = l2_size * cluster_sectors; | |
428 | extent->l2_size = l2_size; | |
301c7d38 | 429 | extent->cluster_sectors = flat ? sectors : cluster_sectors; |
b3976d3c FZ |
430 | |
431 | if (s->num_extents > 1) { | |
432 | extent->end_sector = (*(extent - 1)).end_sector + extent->sectors; | |
433 | } else { | |
434 | extent->end_sector = extent->sectors; | |
435 | } | |
436 | bs->total_sectors = extent->end_sector; | |
8aa1331c FZ |
437 | if (new_extent) { |
438 | *new_extent = extent; | |
439 | } | |
440 | return 0; | |
b3976d3c FZ |
441 | } |
442 | ||
4823970b FZ |
443 | static int vmdk_init_tables(BlockDriverState *bs, VmdkExtent *extent, |
444 | Error **errp) | |
5f4da8c0 | 445 | { |
b4b3ab14 FZ |
446 | int ret; |
447 | int l1_size, i; | |
5f4da8c0 | 448 | |
ea2384d3 | 449 | /* read the L1 table */ |
b3976d3c | 450 | l1_size = extent->l1_size * sizeof(uint32_t); |
7267c094 | 451 | extent->l1_table = g_malloc(l1_size); |
b4b3ab14 | 452 | ret = bdrv_pread(extent->file, |
4823970b FZ |
453 | extent->l1_table_offset, |
454 | extent->l1_table, | |
455 | l1_size); | |
b4b3ab14 | 456 | if (ret < 0) { |
4823970b FZ |
457 | error_setg_errno(errp, -ret, |
458 | "Could not read l1 table from extent '%s'", | |
459 | extent->file->filename); | |
b4b3ab14 | 460 | goto fail_l1; |
b3976d3c FZ |
461 | } |
462 | for (i = 0; i < extent->l1_size; i++) { | |
463 | le32_to_cpus(&extent->l1_table[i]); | |
ea2384d3 FB |
464 | } |
465 | ||
b3976d3c | 466 | if (extent->l1_backup_table_offset) { |
7267c094 | 467 | extent->l1_backup_table = g_malloc(l1_size); |
b4b3ab14 | 468 | ret = bdrv_pread(extent->file, |
4823970b FZ |
469 | extent->l1_backup_table_offset, |
470 | extent->l1_backup_table, | |
471 | l1_size); | |
b4b3ab14 | 472 | if (ret < 0) { |
4823970b FZ |
473 | error_setg_errno(errp, -ret, |
474 | "Could not read l1 backup table from extent '%s'", | |
475 | extent->file->filename); | |
b4b3ab14 | 476 | goto fail_l1b; |
b3976d3c FZ |
477 | } |
478 | for (i = 0; i < extent->l1_size; i++) { | |
479 | le32_to_cpus(&extent->l1_backup_table[i]); | |
ff1afc72 FB |
480 | } |
481 | } | |
482 | ||
b3976d3c | 483 | extent->l2_cache = |
7267c094 | 484 | g_malloc(extent->l2_size * L2_CACHE_SIZE * sizeof(uint32_t)); |
ea2384d3 | 485 | return 0; |
b4b3ab14 | 486 | fail_l1b: |
7267c094 | 487 | g_free(extent->l1_backup_table); |
b4b3ab14 | 488 | fail_l1: |
7267c094 | 489 | g_free(extent->l1_table); |
b4b3ab14 FZ |
490 | return ret; |
491 | } | |
492 | ||
daac8fdc FZ |
493 | static int vmdk_open_vmfs_sparse(BlockDriverState *bs, |
494 | BlockDriverState *file, | |
4823970b | 495 | int flags, Error **errp) |
b4b3ab14 FZ |
496 | { |
497 | int ret; | |
498 | uint32_t magic; | |
499 | VMDK3Header header; | |
500 | VmdkExtent *extent; | |
501 | ||
86c6b429 | 502 | ret = bdrv_pread(file, sizeof(magic), &header, sizeof(header)); |
b4b3ab14 | 503 | if (ret < 0) { |
4823970b FZ |
504 | error_setg_errno(errp, -ret, |
505 | "Could not read header from file '%s'", | |
506 | file->filename); | |
86c6b429 | 507 | return ret; |
b4b3ab14 | 508 | } |
f6b61e54 FZ |
509 | ret = vmdk_add_extent(bs, file, false, |
510 | le32_to_cpu(header.disk_sectors), | |
511 | le32_to_cpu(header.l1dir_offset) << 9, | |
512 | 0, | |
513 | le32_to_cpu(header.l1dir_size), | |
514 | 4096, | |
515 | le32_to_cpu(header.granularity), | |
4823970b FZ |
516 | &extent, |
517 | errp); | |
8aa1331c FZ |
518 | if (ret < 0) { |
519 | return ret; | |
520 | } | |
4823970b | 521 | ret = vmdk_init_tables(bs, extent, errp); |
b4b3ab14 | 522 | if (ret) { |
86c6b429 FZ |
523 | /* free extent allocated by vmdk_add_extent */ |
524 | vmdk_free_last_extent(bs); | |
b4b3ab14 | 525 | } |
b4b3ab14 FZ |
526 | return ret; |
527 | } | |
528 | ||
f16f509d | 529 | static int vmdk_open_desc_file(BlockDriverState *bs, int flags, |
4823970b | 530 | uint64_t desc_offset, Error **errp); |
f16f509d | 531 | |
86c6b429 FZ |
532 | static int vmdk_open_vmdk4(BlockDriverState *bs, |
533 | BlockDriverState *file, | |
4823970b | 534 | int flags, Error **errp) |
b4b3ab14 FZ |
535 | { |
536 | int ret; | |
537 | uint32_t magic; | |
538 | uint32_t l1_size, l1_entry_sectors; | |
539 | VMDK4Header header; | |
b4b3ab14 | 540 | VmdkExtent *extent; |
f4c129a3 | 541 | BDRVVmdkState *s = bs->opaque; |
bb45ded9 | 542 | int64_t l1_backup_offset = 0; |
b4b3ab14 | 543 | |
86c6b429 | 544 | ret = bdrv_pread(file, sizeof(magic), &header, sizeof(header)); |
b4b3ab14 | 545 | if (ret < 0) { |
4823970b FZ |
546 | error_setg_errno(errp, -ret, |
547 | "Could not read header from file '%s'", | |
548 | file->filename); | |
b4b3ab14 | 549 | } |
5a394b9e | 550 | if (header.capacity == 0) { |
e98768d4 | 551 | uint64_t desc_offset = le64_to_cpu(header.desc_offset); |
5a394b9e | 552 | if (desc_offset) { |
4823970b | 553 | return vmdk_open_desc_file(bs, flags, desc_offset << 9, errp); |
5a394b9e | 554 | } |
f16f509d | 555 | } |
65bd155c | 556 | |
f4c129a3 FZ |
557 | if (!s->create_type) { |
558 | s->create_type = g_strdup("monolithicSparse"); | |
559 | } | |
560 | ||
65bd155c KW |
561 | if (le64_to_cpu(header.gd_offset) == VMDK4_GD_AT_END) { |
562 | /* | |
563 | * The footer takes precedence over the header, so read it in. The | |
564 | * footer starts at offset -1024 from the end: One sector for the | |
565 | * footer, and another one for the end-of-stream marker. | |
566 | */ | |
567 | struct { | |
568 | struct { | |
569 | uint64_t val; | |
570 | uint32_t size; | |
571 | uint32_t type; | |
572 | uint8_t pad[512 - 16]; | |
573 | } QEMU_PACKED footer_marker; | |
574 | ||
575 | uint32_t magic; | |
576 | VMDK4Header header; | |
577 | uint8_t pad[512 - 4 - sizeof(VMDK4Header)]; | |
578 | ||
579 | struct { | |
580 | uint64_t val; | |
581 | uint32_t size; | |
582 | uint32_t type; | |
583 | uint8_t pad[512 - 16]; | |
584 | } QEMU_PACKED eos_marker; | |
585 | } QEMU_PACKED footer; | |
586 | ||
587 | ret = bdrv_pread(file, | |
588 | bs->file->total_sectors * 512 - 1536, | |
589 | &footer, sizeof(footer)); | |
590 | if (ret < 0) { | |
591 | return ret; | |
592 | } | |
593 | ||
594 | /* Some sanity checks for the footer */ | |
595 | if (be32_to_cpu(footer.magic) != VMDK4_MAGIC || | |
596 | le32_to_cpu(footer.footer_marker.size) != 0 || | |
597 | le32_to_cpu(footer.footer_marker.type) != MARKER_FOOTER || | |
598 | le64_to_cpu(footer.eos_marker.val) != 0 || | |
599 | le32_to_cpu(footer.eos_marker.size) != 0 || | |
600 | le32_to_cpu(footer.eos_marker.type) != MARKER_END_OF_STREAM) | |
601 | { | |
602 | return -EINVAL; | |
603 | } | |
604 | ||
605 | header = footer.header; | |
606 | } | |
607 | ||
509d39aa | 608 | if (le32_to_cpu(header.version) > 3) { |
96c51eb5 FZ |
609 | char buf[64]; |
610 | snprintf(buf, sizeof(buf), "VMDK version %d", | |
611 | le32_to_cpu(header.version)); | |
612 | qerror_report(QERR_UNKNOWN_BLOCK_FORMAT_FEATURE, | |
613 | bs->device_name, "vmdk", buf); | |
614 | return -ENOTSUP; | |
509d39aa FZ |
615 | } else if (le32_to_cpu(header.version) == 3 && (flags & BDRV_O_RDWR)) { |
616 | /* VMware KB 2064959 explains that version 3 added support for | |
617 | * persistent changed block tracking (CBT), and backup software can | |
618 | * read it as version=1 if it doesn't care about the changed area | |
619 | * information. So we are safe to enable read only. */ | |
620 | error_setg(errp, "VMDK version 3 must be read only"); | |
621 | return -EINVAL; | |
96c51eb5 FZ |
622 | } |
623 | ||
ca8804ce | 624 | if (le32_to_cpu(header.num_gtes_per_gt) > 512) { |
f8ce0403 FZ |
625 | error_report("L2 table size too big"); |
626 | return -EINVAL; | |
627 | } | |
628 | ||
ca8804ce | 629 | l1_entry_sectors = le32_to_cpu(header.num_gtes_per_gt) |
b4b3ab14 | 630 | * le64_to_cpu(header.granularity); |
75d12341 | 631 | if (l1_entry_sectors == 0) { |
86c6b429 FZ |
632 | return -EINVAL; |
633 | } | |
b4b3ab14 FZ |
634 | l1_size = (le64_to_cpu(header.capacity) + l1_entry_sectors - 1) |
635 | / l1_entry_sectors; | |
bb45ded9 FZ |
636 | if (le32_to_cpu(header.flags) & VMDK4_FLAG_RGD) { |
637 | l1_backup_offset = le64_to_cpu(header.rgd_offset) << 9; | |
638 | } | |
8aa1331c | 639 | ret = vmdk_add_extent(bs, file, false, |
b4b3ab14 FZ |
640 | le64_to_cpu(header.capacity), |
641 | le64_to_cpu(header.gd_offset) << 9, | |
bb45ded9 | 642 | l1_backup_offset, |
b4b3ab14 | 643 | l1_size, |
ca8804ce | 644 | le32_to_cpu(header.num_gtes_per_gt), |
8aa1331c | 645 | le64_to_cpu(header.granularity), |
4823970b FZ |
646 | &extent, |
647 | errp); | |
8aa1331c FZ |
648 | if (ret < 0) { |
649 | return ret; | |
650 | } | |
432bb170 FZ |
651 | extent->compressed = |
652 | le16_to_cpu(header.compressAlgorithm) == VMDK4_COMPRESSION_DEFLATE; | |
653 | extent->has_marker = le32_to_cpu(header.flags) & VMDK4_FLAG_MARKER; | |
14ead646 FZ |
654 | extent->version = le32_to_cpu(header.version); |
655 | extent->has_zero_grain = le32_to_cpu(header.flags) & VMDK4_FLAG_ZERO_GRAIN; | |
4823970b | 656 | ret = vmdk_init_tables(bs, extent, errp); |
b4b3ab14 | 657 | if (ret) { |
86c6b429 FZ |
658 | /* free extent allocated by vmdk_add_extent */ |
659 | vmdk_free_last_extent(bs); | |
b4b3ab14 | 660 | } |
b4b3ab14 FZ |
661 | return ret; |
662 | } | |
663 | ||
7fa60fa3 FZ |
664 | /* find an option value out of descriptor file */ |
665 | static int vmdk_parse_description(const char *desc, const char *opt_name, | |
666 | char *buf, int buf_size) | |
667 | { | |
668 | char *opt_pos, *opt_end; | |
669 | const char *end = desc + strlen(desc); | |
670 | ||
671 | opt_pos = strstr(desc, opt_name); | |
672 | if (!opt_pos) { | |
65f74725 | 673 | return VMDK_ERROR; |
7fa60fa3 FZ |
674 | } |
675 | /* Skip "=\"" following opt_name */ | |
676 | opt_pos += strlen(opt_name) + 2; | |
677 | if (opt_pos >= end) { | |
65f74725 | 678 | return VMDK_ERROR; |
7fa60fa3 FZ |
679 | } |
680 | opt_end = opt_pos; | |
681 | while (opt_end < end && *opt_end != '"') { | |
682 | opt_end++; | |
683 | } | |
684 | if (opt_end == end || buf_size < opt_end - opt_pos + 1) { | |
65f74725 | 685 | return VMDK_ERROR; |
7fa60fa3 FZ |
686 | } |
687 | pstrcpy(buf, opt_end - opt_pos + 1, opt_pos); | |
65f74725 | 688 | return VMDK_OK; |
7fa60fa3 FZ |
689 | } |
690 | ||
86c6b429 FZ |
691 | /* Open an extent file and append to bs array */ |
692 | static int vmdk_open_sparse(BlockDriverState *bs, | |
693 | BlockDriverState *file, | |
4823970b | 694 | int flags, Error **errp) |
86c6b429 FZ |
695 | { |
696 | uint32_t magic; | |
697 | ||
698 | if (bdrv_pread(file, 0, &magic, sizeof(magic)) != sizeof(magic)) { | |
699 | return -EIO; | |
700 | } | |
701 | ||
702 | magic = be32_to_cpu(magic); | |
703 | switch (magic) { | |
704 | case VMDK3_MAGIC: | |
4823970b | 705 | return vmdk_open_vmfs_sparse(bs, file, flags, errp); |
86c6b429 FZ |
706 | break; |
707 | case VMDK4_MAGIC: | |
4823970b | 708 | return vmdk_open_vmdk4(bs, file, flags, errp); |
86c6b429 FZ |
709 | break; |
710 | default: | |
15bac0d5 | 711 | return -EMEDIUMTYPE; |
86c6b429 FZ |
712 | break; |
713 | } | |
714 | } | |
715 | ||
7fa60fa3 | 716 | static int vmdk_parse_extents(const char *desc, BlockDriverState *bs, |
4823970b | 717 | const char *desc_file_path, Error **errp) |
7fa60fa3 FZ |
718 | { |
719 | int ret; | |
720 | char access[11]; | |
721 | char type[11]; | |
722 | char fname[512]; | |
723 | const char *p = desc; | |
724 | int64_t sectors = 0; | |
725 | int64_t flat_offset; | |
86c6b429 FZ |
726 | char extent_path[PATH_MAX]; |
727 | BlockDriverState *extent_file; | |
f4c129a3 FZ |
728 | BDRVVmdkState *s = bs->opaque; |
729 | VmdkExtent *extent; | |
7fa60fa3 FZ |
730 | |
731 | while (*p) { | |
732 | /* parse extent line: | |
733 | * RW [size in sectors] FLAT "file-name.vmdk" OFFSET | |
734 | * or | |
735 | * RW [size in sectors] SPARSE "file-name.vmdk" | |
736 | */ | |
737 | flat_offset = -1; | |
cd923475 | 738 | ret = sscanf(p, "%10s %" SCNd64 " %10s \"%511[^\n\r\"]\" %" SCNd64, |
7fa60fa3 FZ |
739 | access, §ors, type, fname, &flat_offset); |
740 | if (ret < 4 || strcmp(access, "RW")) { | |
741 | goto next_line; | |
742 | } else if (!strcmp(type, "FLAT")) { | |
743 | if (ret != 5 || flat_offset < 0) { | |
4823970b | 744 | error_setg(errp, "Invalid extent lines: \n%s", p); |
7fa60fa3 FZ |
745 | return -EINVAL; |
746 | } | |
dbbcaa8d FZ |
747 | } else if (!strcmp(type, "VMFS")) { |
748 | flat_offset = 0; | |
7fa60fa3 | 749 | } else if (ret != 4) { |
4823970b | 750 | error_setg(errp, "Invalid extent lines: \n%s", p); |
7fa60fa3 FZ |
751 | return -EINVAL; |
752 | } | |
753 | ||
7fa60fa3 | 754 | if (sectors <= 0 || |
daac8fdc | 755 | (strcmp(type, "FLAT") && strcmp(type, "SPARSE") && |
04d542c8 | 756 | strcmp(type, "VMFS") && strcmp(type, "VMFSSPARSE")) || |
7fa60fa3 FZ |
757 | (strcmp(access, "RW"))) { |
758 | goto next_line; | |
759 | } | |
760 | ||
86c6b429 FZ |
761 | path_combine(extent_path, sizeof(extent_path), |
762 | desc_file_path, fname); | |
34b5d2c6 | 763 | ret = bdrv_file_open(&extent_file, extent_path, NULL, bs->open_flags, |
4823970b | 764 | errp); |
86c6b429 FZ |
765 | if (ret) { |
766 | return ret; | |
767 | } | |
768 | ||
7fa60fa3 | 769 | /* save to extents array */ |
04d542c8 | 770 | if (!strcmp(type, "FLAT") || !strcmp(type, "VMFS")) { |
7fa60fa3 | 771 | /* FLAT extent */ |
7fa60fa3 | 772 | |
8aa1331c | 773 | ret = vmdk_add_extent(bs, extent_file, true, sectors, |
4823970b | 774 | 0, 0, 0, 0, 0, &extent, errp); |
8aa1331c FZ |
775 | if (ret < 0) { |
776 | return ret; | |
777 | } | |
f16f509d | 778 | extent->flat_start_offset = flat_offset << 9; |
daac8fdc FZ |
779 | } else if (!strcmp(type, "SPARSE") || !strcmp(type, "VMFSSPARSE")) { |
780 | /* SPARSE extent and VMFSSPARSE extent are both "COWD" sparse file*/ | |
4823970b | 781 | ret = vmdk_open_sparse(bs, extent_file, bs->open_flags, errp); |
86c6b429 | 782 | if (ret) { |
4f6fd349 | 783 | bdrv_unref(extent_file); |
86c6b429 FZ |
784 | return ret; |
785 | } | |
f4c129a3 | 786 | extent = &s->extents[s->num_extents - 1]; |
7fa60fa3 | 787 | } else { |
4823970b | 788 | error_setg(errp, "Unsupported extent type '%s'", type); |
7fa60fa3 FZ |
789 | return -ENOTSUP; |
790 | } | |
f4c129a3 | 791 | extent->type = g_strdup(type); |
7fa60fa3 FZ |
792 | next_line: |
793 | /* move to next line */ | |
899f1ae2 FZ |
794 | while (*p) { |
795 | if (*p == '\n') { | |
796 | p++; | |
797 | break; | |
798 | } | |
7fa60fa3 FZ |
799 | p++; |
800 | } | |
7fa60fa3 FZ |
801 | } |
802 | return 0; | |
803 | } | |
804 | ||
f16f509d | 805 | static int vmdk_open_desc_file(BlockDriverState *bs, int flags, |
4823970b | 806 | uint64_t desc_offset, Error **errp) |
7fa60fa3 FZ |
807 | { |
808 | int ret; | |
0bed087d | 809 | char *buf = NULL; |
7fa60fa3 FZ |
810 | char ct[128]; |
811 | BDRVVmdkState *s = bs->opaque; | |
0bed087d | 812 | int64_t size; |
7fa60fa3 | 813 | |
0bed087d EB |
814 | size = bdrv_getlength(bs->file); |
815 | if (size < 0) { | |
816 | return -EINVAL; | |
817 | } | |
818 | ||
819 | size = MIN(size, 1 << 20); /* avoid unbounded allocation */ | |
820 | buf = g_malloc0(size + 1); | |
821 | ||
822 | ret = bdrv_pread(bs->file, desc_offset, buf, size); | |
7fa60fa3 | 823 | if (ret < 0) { |
0bed087d | 824 | goto exit; |
7fa60fa3 | 825 | } |
7fa60fa3 | 826 | if (vmdk_parse_description(buf, "createType", ct, sizeof(ct))) { |
0bed087d EB |
827 | ret = -EMEDIUMTYPE; |
828 | goto exit; | |
7fa60fa3 | 829 | } |
6398de51 | 830 | if (strcmp(ct, "monolithicFlat") && |
04d542c8 | 831 | strcmp(ct, "vmfs") && |
daac8fdc | 832 | strcmp(ct, "vmfsSparse") && |
86c6b429 | 833 | strcmp(ct, "twoGbMaxExtentSparse") && |
6398de51 | 834 | strcmp(ct, "twoGbMaxExtentFlat")) { |
4823970b | 835 | error_setg(errp, "Unsupported image type '%s'", ct); |
0bed087d EB |
836 | ret = -ENOTSUP; |
837 | goto exit; | |
7fa60fa3 | 838 | } |
f4c129a3 | 839 | s->create_type = g_strdup(ct); |
7fa60fa3 | 840 | s->desc_offset = 0; |
4823970b | 841 | ret = vmdk_parse_extents(buf, bs, bs->file->filename, errp); |
0bed087d EB |
842 | exit: |
843 | g_free(buf); | |
844 | return ret; | |
7fa60fa3 FZ |
845 | } |
846 | ||
015a1036 HR |
847 | static int vmdk_open(BlockDriverState *bs, QDict *options, int flags, |
848 | Error **errp) | |
b4b3ab14 | 849 | { |
86c6b429 FZ |
850 | int ret; |
851 | BDRVVmdkState *s = bs->opaque; | |
b4b3ab14 | 852 | |
4823970b | 853 | if (vmdk_open_sparse(bs, bs->file, flags, errp) == 0) { |
86c6b429 | 854 | s->desc_offset = 0x200; |
bae0a0cc | 855 | } else { |
4823970b | 856 | ret = vmdk_open_desc_file(bs, flags, 0, errp); |
86c6b429 | 857 | if (ret) { |
bae0a0cc | 858 | goto fail; |
86c6b429 | 859 | } |
b4b3ab14 | 860 | } |
bae0a0cc PB |
861 | /* try to open parent images, if exist */ |
862 | ret = vmdk_parent_open(bs); | |
863 | if (ret) { | |
864 | goto fail; | |
865 | } | |
f4c129a3 | 866 | s->cid = vmdk_read_cid(bs, 0); |
bae0a0cc | 867 | s->parent_cid = vmdk_read_cid(bs, 1); |
848c66e8 | 868 | qemu_co_mutex_init(&s->lock); |
2bc3166c KW |
869 | |
870 | /* Disable migration when VMDK images are used */ | |
871 | error_set(&s->migration_blocker, | |
872 | QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED, | |
873 | "vmdk", bs->device_name, "live migration"); | |
874 | migrate_add_blocker(s->migration_blocker); | |
875 | ||
876 | return 0; | |
bae0a0cc PB |
877 | |
878 | fail: | |
f4c129a3 FZ |
879 | g_free(s->create_type); |
880 | s->create_type = NULL; | |
bae0a0cc PB |
881 | vmdk_free_extents(bs); |
882 | return ret; | |
ea2384d3 FB |
883 | } |
884 | ||
b3976d3c FZ |
885 | static int get_whole_cluster(BlockDriverState *bs, |
886 | VmdkExtent *extent, | |
887 | uint64_t cluster_offset, | |
888 | uint64_t offset, | |
889 | bool allocate) | |
5f4da8c0 | 890 | { |
bf81507d FZ |
891 | int ret = VMDK_OK; |
892 | uint8_t *whole_grain = NULL; | |
5f4da8c0 | 893 | |
0e69c543 FZ |
894 | /* we will be here if it's first write on non-exist grain(cluster). |
895 | * try to read from parent image, if exist */ | |
b171271a | 896 | if (bs->backing_hd) { |
bf81507d FZ |
897 | whole_grain = |
898 | qemu_blockalign(bs, extent->cluster_sectors << BDRV_SECTOR_BITS); | |
ae261c86 | 899 | if (!vmdk_is_cid_valid(bs)) { |
bf81507d FZ |
900 | ret = VMDK_ERROR; |
901 | goto exit; | |
ae261c86 | 902 | } |
5f4da8c0 | 903 | |
0e69c543 FZ |
904 | /* floor offset to cluster */ |
905 | offset -= offset % (extent->cluster_sectors * 512); | |
c336500d | 906 | ret = bdrv_read(bs->backing_hd, offset >> 9, whole_grain, |
b3976d3c | 907 | extent->cluster_sectors); |
c336500d | 908 | if (ret < 0) { |
bf81507d FZ |
909 | ret = VMDK_ERROR; |
910 | goto exit; | |
c336500d | 911 | } |
630530a6 | 912 | |
0e69c543 | 913 | /* Write grain only into the active image */ |
b3976d3c FZ |
914 | ret = bdrv_write(extent->file, cluster_offset, whole_grain, |
915 | extent->cluster_sectors); | |
c336500d | 916 | if (ret < 0) { |
bf81507d FZ |
917 | ret = VMDK_ERROR; |
918 | goto exit; | |
630530a6 TS |
919 | } |
920 | } | |
bf81507d FZ |
921 | exit: |
922 | qemu_vfree(whole_grain); | |
923 | return ret; | |
630530a6 TS |
924 | } |
925 | ||
b3976d3c | 926 | static int vmdk_L2update(VmdkExtent *extent, VmdkMetaData *m_data) |
630530a6 | 927 | { |
e304e8e5 FZ |
928 | uint32_t offset; |
929 | QEMU_BUILD_BUG_ON(sizeof(offset) != sizeof(m_data->offset)); | |
930 | offset = cpu_to_le32(m_data->offset); | |
630530a6 | 931 | /* update L2 table */ |
b3976d3c FZ |
932 | if (bdrv_pwrite_sync( |
933 | extent->file, | |
934 | ((int64_t)m_data->l2_offset * 512) | |
935 | + (m_data->l2_index * sizeof(m_data->offset)), | |
e304e8e5 | 936 | &offset, sizeof(offset)) < 0) { |
65f74725 | 937 | return VMDK_ERROR; |
b3976d3c | 938 | } |
630530a6 | 939 | /* update backup L2 table */ |
b3976d3c FZ |
940 | if (extent->l1_backup_table_offset != 0) { |
941 | m_data->l2_offset = extent->l1_backup_table[m_data->l1_index]; | |
942 | if (bdrv_pwrite_sync( | |
943 | extent->file, | |
944 | ((int64_t)m_data->l2_offset * 512) | |
945 | + (m_data->l2_index * sizeof(m_data->offset)), | |
e304e8e5 | 946 | &offset, sizeof(offset)) < 0) { |
65f74725 | 947 | return VMDK_ERROR; |
b3976d3c | 948 | } |
5f4da8c0 | 949 | } |
cdeaf1f1 FZ |
950 | if (m_data->l2_cache_entry) { |
951 | *m_data->l2_cache_entry = offset; | |
952 | } | |
630530a6 | 953 | |
65f74725 | 954 | return VMDK_OK; |
5f4da8c0 TS |
955 | } |
956 | ||
91b85bd3 | 957 | static int get_cluster_offset(BlockDriverState *bs, |
b3976d3c FZ |
958 | VmdkExtent *extent, |
959 | VmdkMetaData *m_data, | |
91b85bd3 FZ |
960 | uint64_t offset, |
961 | int allocate, | |
962 | uint64_t *cluster_offset) | |
ea2384d3 | 963 | { |
ea2384d3 FB |
964 | unsigned int l1_index, l2_offset, l2_index; |
965 | int min_index, i, j; | |
e304e8e5 | 966 | uint32_t min_count, *l2_table; |
14ead646 | 967 | bool zeroed = false; |
630530a6 | 968 | |
ae261c86 | 969 | if (m_data) { |
630530a6 | 970 | m_data->valid = 0; |
ae261c86 | 971 | } |
91b85bd3 | 972 | if (extent->flat) { |
7fa60fa3 | 973 | *cluster_offset = extent->flat_start_offset; |
65f74725 | 974 | return VMDK_OK; |
91b85bd3 | 975 | } |
630530a6 | 976 | |
6398de51 | 977 | offset -= (extent->end_sector - extent->sectors) * SECTOR_SIZE; |
b3976d3c FZ |
978 | l1_index = (offset >> 9) / extent->l1_entry_sectors; |
979 | if (l1_index >= extent->l1_size) { | |
65f74725 | 980 | return VMDK_ERROR; |
b3976d3c FZ |
981 | } |
982 | l2_offset = extent->l1_table[l1_index]; | |
983 | if (!l2_offset) { | |
65f74725 | 984 | return VMDK_UNALLOC; |
b3976d3c | 985 | } |
b4b3ab14 | 986 | for (i = 0; i < L2_CACHE_SIZE; i++) { |
b3976d3c | 987 | if (l2_offset == extent->l2_cache_offsets[i]) { |
ea2384d3 | 988 | /* increment the hit count */ |
b3976d3c | 989 | if (++extent->l2_cache_counts[i] == 0xffffffff) { |
b4b3ab14 | 990 | for (j = 0; j < L2_CACHE_SIZE; j++) { |
b3976d3c | 991 | extent->l2_cache_counts[j] >>= 1; |
ea2384d3 FB |
992 | } |
993 | } | |
b3976d3c | 994 | l2_table = extent->l2_cache + (i * extent->l2_size); |
ea2384d3 FB |
995 | goto found; |
996 | } | |
997 | } | |
998 | /* not found: load a new entry in the least used one */ | |
999 | min_index = 0; | |
1000 | min_count = 0xffffffff; | |
b4b3ab14 | 1001 | for (i = 0; i < L2_CACHE_SIZE; i++) { |
b3976d3c FZ |
1002 | if (extent->l2_cache_counts[i] < min_count) { |
1003 | min_count = extent->l2_cache_counts[i]; | |
ea2384d3 FB |
1004 | min_index = i; |
1005 | } | |
1006 | } | |
b3976d3c FZ |
1007 | l2_table = extent->l2_cache + (min_index * extent->l2_size); |
1008 | if (bdrv_pread( | |
1009 | extent->file, | |
1010 | (int64_t)l2_offset * 512, | |
1011 | l2_table, | |
1012 | extent->l2_size * sizeof(uint32_t) | |
1013 | ) != extent->l2_size * sizeof(uint32_t)) { | |
65f74725 | 1014 | return VMDK_ERROR; |
b3976d3c | 1015 | } |
5f4da8c0 | 1016 | |
b3976d3c FZ |
1017 | extent->l2_cache_offsets[min_index] = l2_offset; |
1018 | extent->l2_cache_counts[min_index] = 1; | |
ea2384d3 | 1019 | found: |
b3976d3c | 1020 | l2_index = ((offset >> 9) / extent->cluster_sectors) % extent->l2_size; |
91b85bd3 | 1021 | *cluster_offset = le32_to_cpu(l2_table[l2_index]); |
630530a6 | 1022 | |
cdeaf1f1 FZ |
1023 | if (m_data) { |
1024 | m_data->valid = 1; | |
1025 | m_data->l1_index = l1_index; | |
1026 | m_data->l2_index = l2_index; | |
1027 | m_data->offset = *cluster_offset; | |
1028 | m_data->l2_offset = l2_offset; | |
1029 | m_data->l2_cache_entry = &l2_table[l2_index]; | |
1030 | } | |
14ead646 FZ |
1031 | if (extent->has_zero_grain && *cluster_offset == VMDK_GTE_ZEROED) { |
1032 | zeroed = true; | |
1033 | } | |
1034 | ||
1035 | if (!*cluster_offset || zeroed) { | |
91b85bd3 | 1036 | if (!allocate) { |
14ead646 | 1037 | return zeroed ? VMDK_ZEROED : VMDK_UNALLOC; |
91b85bd3 | 1038 | } |
9949f97e | 1039 | |
ae261c86 | 1040 | /* Avoid the L2 tables update for the images that have snapshots. */ |
91b85bd3 | 1041 | *cluster_offset = bdrv_getlength(extent->file); |
2b2c8c5d FZ |
1042 | if (!extent->compressed) { |
1043 | bdrv_truncate( | |
1044 | extent->file, | |
1045 | *cluster_offset + (extent->cluster_sectors << 9) | |
1046 | ); | |
1047 | } | |
9949f97e | 1048 | |
91b85bd3 | 1049 | *cluster_offset >>= 9; |
e304e8e5 | 1050 | l2_table[l2_index] = cpu_to_le32(*cluster_offset); |
630530a6 | 1051 | |
630530a6 TS |
1052 | /* First of all we write grain itself, to avoid race condition |
1053 | * that may to corrupt the image. | |
1054 | * This problem may occur because of insufficient space on host disk | |
1055 | * or inappropriate VM shutdown. | |
1056 | */ | |
b3976d3c | 1057 | if (get_whole_cluster( |
ae261c86 | 1058 | bs, extent, *cluster_offset, offset, allocate) == -1) { |
65f74725 | 1059 | return VMDK_ERROR; |
ae261c86 | 1060 | } |
630530a6 TS |
1061 | |
1062 | if (m_data) { | |
e304e8e5 | 1063 | m_data->offset = *cluster_offset; |
630530a6 | 1064 | } |
ff1afc72 | 1065 | } |
91b85bd3 | 1066 | *cluster_offset <<= 9; |
65f74725 | 1067 | return VMDK_OK; |
ea2384d3 FB |
1068 | } |
1069 | ||
b3976d3c FZ |
1070 | static VmdkExtent *find_extent(BDRVVmdkState *s, |
1071 | int64_t sector_num, VmdkExtent *start_hint) | |
1072 | { | |
1073 | VmdkExtent *extent = start_hint; | |
1074 | ||
1075 | if (!extent) { | |
1076 | extent = &s->extents[0]; | |
1077 | } | |
1078 | while (extent < &s->extents[s->num_extents]) { | |
1079 | if (sector_num < extent->end_sector) { | |
1080 | return extent; | |
1081 | } | |
1082 | extent++; | |
1083 | } | |
1084 | return NULL; | |
1085 | } | |
1086 | ||
b6b8a333 | 1087 | static int64_t coroutine_fn vmdk_co_get_block_status(BlockDriverState *bs, |
f8a2e5e3 | 1088 | int64_t sector_num, int nb_sectors, int *pnum) |
ea2384d3 FB |
1089 | { |
1090 | BDRVVmdkState *s = bs->opaque; | |
b3976d3c FZ |
1091 | int64_t index_in_cluster, n, ret; |
1092 | uint64_t offset; | |
1093 | VmdkExtent *extent; | |
1094 | ||
1095 | extent = find_extent(s, sector_num, NULL); | |
1096 | if (!extent) { | |
1097 | return 0; | |
1098 | } | |
f8a2e5e3 | 1099 | qemu_co_mutex_lock(&s->lock); |
91b85bd3 FZ |
1100 | ret = get_cluster_offset(bs, extent, NULL, |
1101 | sector_num * 512, 0, &offset); | |
f8a2e5e3 | 1102 | qemu_co_mutex_unlock(&s->lock); |
14ead646 | 1103 | |
4bc74be9 PB |
1104 | switch (ret) { |
1105 | case VMDK_ERROR: | |
1106 | ret = -EIO; | |
1107 | break; | |
1108 | case VMDK_UNALLOC: | |
1109 | ret = 0; | |
1110 | break; | |
1111 | case VMDK_ZEROED: | |
1112 | ret = BDRV_BLOCK_ZERO; | |
1113 | break; | |
1114 | case VMDK_OK: | |
1115 | ret = BDRV_BLOCK_DATA; | |
1116 | if (extent->file == bs->file) { | |
1117 | ret |= BDRV_BLOCK_OFFSET_VALID | offset; | |
1118 | } | |
1119 | ||
1120 | break; | |
1121 | } | |
91b85bd3 FZ |
1122 | |
1123 | index_in_cluster = sector_num % extent->cluster_sectors; | |
1124 | n = extent->cluster_sectors - index_in_cluster; | |
ae261c86 | 1125 | if (n > nb_sectors) { |
ea2384d3 | 1126 | n = nb_sectors; |
ae261c86 | 1127 | } |
ea2384d3 | 1128 | *pnum = n; |
b3976d3c | 1129 | return ret; |
ea2384d3 FB |
1130 | } |
1131 | ||
dd3f6ee2 FZ |
1132 | static int vmdk_write_extent(VmdkExtent *extent, int64_t cluster_offset, |
1133 | int64_t offset_in_cluster, const uint8_t *buf, | |
1134 | int nb_sectors, int64_t sector_num) | |
1135 | { | |
1136 | int ret; | |
2b2c8c5d FZ |
1137 | VmdkGrainMarker *data = NULL; |
1138 | uLongf buf_len; | |
dd3f6ee2 FZ |
1139 | const uint8_t *write_buf = buf; |
1140 | int write_len = nb_sectors * 512; | |
1141 | ||
2b2c8c5d FZ |
1142 | if (extent->compressed) { |
1143 | if (!extent->has_marker) { | |
1144 | ret = -EINVAL; | |
1145 | goto out; | |
1146 | } | |
1147 | buf_len = (extent->cluster_sectors << 9) * 2; | |
1148 | data = g_malloc(buf_len + sizeof(VmdkGrainMarker)); | |
1149 | if (compress(data->data, &buf_len, buf, nb_sectors << 9) != Z_OK || | |
1150 | buf_len == 0) { | |
1151 | ret = -EINVAL; | |
1152 | goto out; | |
1153 | } | |
1154 | data->lba = sector_num; | |
1155 | data->size = buf_len; | |
1156 | write_buf = (uint8_t *)data; | |
1157 | write_len = buf_len + sizeof(VmdkGrainMarker); | |
1158 | } | |
dd3f6ee2 FZ |
1159 | ret = bdrv_pwrite(extent->file, |
1160 | cluster_offset + offset_in_cluster, | |
1161 | write_buf, | |
1162 | write_len); | |
1163 | if (ret != write_len) { | |
1164 | ret = ret < 0 ? ret : -EIO; | |
1165 | goto out; | |
1166 | } | |
1167 | ret = 0; | |
1168 | out: | |
2b2c8c5d | 1169 | g_free(data); |
dd3f6ee2 FZ |
1170 | return ret; |
1171 | } | |
1172 | ||
1173 | static int vmdk_read_extent(VmdkExtent *extent, int64_t cluster_offset, | |
1174 | int64_t offset_in_cluster, uint8_t *buf, | |
1175 | int nb_sectors) | |
1176 | { | |
1177 | int ret; | |
2b2c8c5d FZ |
1178 | int cluster_bytes, buf_bytes; |
1179 | uint8_t *cluster_buf, *compressed_data; | |
1180 | uint8_t *uncomp_buf; | |
1181 | uint32_t data_len; | |
1182 | VmdkGrainMarker *marker; | |
1183 | uLongf buf_len; | |
1184 | ||
dd3f6ee2 | 1185 | |
2b2c8c5d FZ |
1186 | if (!extent->compressed) { |
1187 | ret = bdrv_pread(extent->file, | |
1188 | cluster_offset + offset_in_cluster, | |
1189 | buf, nb_sectors * 512); | |
1190 | if (ret == nb_sectors * 512) { | |
1191 | return 0; | |
1192 | } else { | |
1193 | return -EIO; | |
1194 | } | |
1195 | } | |
1196 | cluster_bytes = extent->cluster_sectors * 512; | |
1197 | /* Read two clusters in case GrainMarker + compressed data > one cluster */ | |
1198 | buf_bytes = cluster_bytes * 2; | |
1199 | cluster_buf = g_malloc(buf_bytes); | |
1200 | uncomp_buf = g_malloc(cluster_bytes); | |
dd3f6ee2 | 1201 | ret = bdrv_pread(extent->file, |
2b2c8c5d FZ |
1202 | cluster_offset, |
1203 | cluster_buf, buf_bytes); | |
1204 | if (ret < 0) { | |
1205 | goto out; | |
1206 | } | |
1207 | compressed_data = cluster_buf; | |
1208 | buf_len = cluster_bytes; | |
1209 | data_len = cluster_bytes; | |
1210 | if (extent->has_marker) { | |
1211 | marker = (VmdkGrainMarker *)cluster_buf; | |
1212 | compressed_data = marker->data; | |
1213 | data_len = le32_to_cpu(marker->size); | |
1214 | } | |
1215 | if (!data_len || data_len > buf_bytes) { | |
1216 | ret = -EINVAL; | |
1217 | goto out; | |
1218 | } | |
1219 | ret = uncompress(uncomp_buf, &buf_len, compressed_data, data_len); | |
1220 | if (ret != Z_OK) { | |
1221 | ret = -EINVAL; | |
1222 | goto out; | |
1223 | ||
1224 | } | |
1225 | if (offset_in_cluster < 0 || | |
1226 | offset_in_cluster + nb_sectors * 512 > buf_len) { | |
1227 | ret = -EINVAL; | |
1228 | goto out; | |
dd3f6ee2 | 1229 | } |
2b2c8c5d FZ |
1230 | memcpy(buf, uncomp_buf + offset_in_cluster, nb_sectors * 512); |
1231 | ret = 0; | |
1232 | ||
1233 | out: | |
1234 | g_free(uncomp_buf); | |
1235 | g_free(cluster_buf); | |
1236 | return ret; | |
dd3f6ee2 FZ |
1237 | } |
1238 | ||
5fafdf24 | 1239 | static int vmdk_read(BlockDriverState *bs, int64_t sector_num, |
ea2384d3 FB |
1240 | uint8_t *buf, int nb_sectors) |
1241 | { | |
1242 | BDRVVmdkState *s = bs->opaque; | |
b3976d3c FZ |
1243 | int ret; |
1244 | uint64_t n, index_in_cluster; | |
b1649fae | 1245 | uint64_t extent_begin_sector, extent_relative_sector_num; |
b3976d3c | 1246 | VmdkExtent *extent = NULL; |
ea2384d3 | 1247 | uint64_t cluster_offset; |
5f4da8c0 | 1248 | |
ea2384d3 | 1249 | while (nb_sectors > 0) { |
b3976d3c FZ |
1250 | extent = find_extent(s, sector_num, extent); |
1251 | if (!extent) { | |
1252 | return -EIO; | |
1253 | } | |
91b85bd3 FZ |
1254 | ret = get_cluster_offset( |
1255 | bs, extent, NULL, | |
1256 | sector_num << 9, 0, &cluster_offset); | |
b1649fae GW |
1257 | extent_begin_sector = extent->end_sector - extent->sectors; |
1258 | extent_relative_sector_num = sector_num - extent_begin_sector; | |
1259 | index_in_cluster = extent_relative_sector_num % extent->cluster_sectors; | |
b3976d3c | 1260 | n = extent->cluster_sectors - index_in_cluster; |
ae261c86 | 1261 | if (n > nb_sectors) { |
ea2384d3 | 1262 | n = nb_sectors; |
ae261c86 | 1263 | } |
14ead646 | 1264 | if (ret != VMDK_OK) { |
91b85bd3 | 1265 | /* if not allocated, try to read from parent image, if exist */ |
14ead646 | 1266 | if (bs->backing_hd && ret != VMDK_ZEROED) { |
ae261c86 | 1267 | if (!vmdk_is_cid_valid(bs)) { |
7fa60fa3 | 1268 | return -EINVAL; |
ae261c86 | 1269 | } |
b171271a | 1270 | ret = bdrv_read(bs->backing_hd, sector_num, buf, n); |
ae261c86 | 1271 | if (ret < 0) { |
7fa60fa3 | 1272 | return ret; |
ae261c86 | 1273 | } |
5f4da8c0 TS |
1274 | } else { |
1275 | memset(buf, 0, 512 * n); | |
1276 | } | |
ea2384d3 | 1277 | } else { |
dd3f6ee2 FZ |
1278 | ret = vmdk_read_extent(extent, |
1279 | cluster_offset, index_in_cluster * 512, | |
1280 | buf, n); | |
1281 | if (ret) { | |
7fa60fa3 FZ |
1282 | return ret; |
1283 | } | |
ea2384d3 FB |
1284 | } |
1285 | nb_sectors -= n; | |
1286 | sector_num += n; | |
1287 | buf += n * 512; | |
1288 | } | |
1289 | return 0; | |
1290 | } | |
1291 | ||
2914caa0 PB |
1292 | static coroutine_fn int vmdk_co_read(BlockDriverState *bs, int64_t sector_num, |
1293 | uint8_t *buf, int nb_sectors) | |
1294 | { | |
1295 | int ret; | |
1296 | BDRVVmdkState *s = bs->opaque; | |
1297 | qemu_co_mutex_lock(&s->lock); | |
1298 | ret = vmdk_read(bs, sector_num, buf, nb_sectors); | |
1299 | qemu_co_mutex_unlock(&s->lock); | |
1300 | return ret; | |
1301 | } | |
1302 | ||
cdeaf1f1 FZ |
1303 | /** |
1304 | * vmdk_write: | |
1305 | * @zeroed: buf is ignored (data is zero), use zeroed_grain GTE feature | |
8e507243 FZ |
1306 | * if possible, otherwise return -ENOTSUP. |
1307 | * @zero_dry_run: used for zeroed == true only, don't update L2 table, just try | |
1308 | * with each cluster. By dry run we can find if the zero write | |
1309 | * is possible without modifying image data. | |
cdeaf1f1 FZ |
1310 | * |
1311 | * Returns: error code with 0 for success. | |
1312 | */ | |
5fafdf24 | 1313 | static int vmdk_write(BlockDriverState *bs, int64_t sector_num, |
cdeaf1f1 FZ |
1314 | const uint8_t *buf, int nb_sectors, |
1315 | bool zeroed, bool zero_dry_run) | |
ea2384d3 | 1316 | { |
ff1afc72 | 1317 | BDRVVmdkState *s = bs->opaque; |
b3976d3c | 1318 | VmdkExtent *extent = NULL; |
91b85bd3 | 1319 | int n, ret; |
b3976d3c | 1320 | int64_t index_in_cluster; |
b1649fae | 1321 | uint64_t extent_begin_sector, extent_relative_sector_num; |
ff1afc72 | 1322 | uint64_t cluster_offset; |
b3976d3c | 1323 | VmdkMetaData m_data; |
ff1afc72 | 1324 | |
630530a6 | 1325 | if (sector_num > bs->total_sectors) { |
4823970b | 1326 | error_report("Wrong offset: sector_num=0x%" PRIx64 |
92868412 | 1327 | " total_sectors=0x%" PRIx64 "\n", |
630530a6 | 1328 | sector_num, bs->total_sectors); |
7fa60fa3 | 1329 | return -EIO; |
630530a6 TS |
1330 | } |
1331 | ||
ff1afc72 | 1332 | while (nb_sectors > 0) { |
b3976d3c FZ |
1333 | extent = find_extent(s, sector_num, extent); |
1334 | if (!extent) { | |
1335 | return -EIO; | |
1336 | } | |
91b85bd3 | 1337 | ret = get_cluster_offset( |
b3976d3c FZ |
1338 | bs, |
1339 | extent, | |
1340 | &m_data, | |
2b2c8c5d | 1341 | sector_num << 9, !extent->compressed, |
91b85bd3 | 1342 | &cluster_offset); |
2b2c8c5d | 1343 | if (extent->compressed) { |
65f74725 | 1344 | if (ret == VMDK_OK) { |
2b2c8c5d | 1345 | /* Refuse write to allocated cluster for streamOptimized */ |
4823970b FZ |
1346 | error_report("Could not write to allocated cluster" |
1347 | " for streamOptimized"); | |
2b2c8c5d FZ |
1348 | return -EIO; |
1349 | } else { | |
1350 | /* allocate */ | |
1351 | ret = get_cluster_offset( | |
1352 | bs, | |
1353 | extent, | |
1354 | &m_data, | |
1355 | sector_num << 9, 1, | |
1356 | &cluster_offset); | |
1357 | } | |
1358 | } | |
cdeaf1f1 | 1359 | if (ret == VMDK_ERROR) { |
91b85bd3 | 1360 | return -EINVAL; |
b3976d3c | 1361 | } |
b1649fae GW |
1362 | extent_begin_sector = extent->end_sector - extent->sectors; |
1363 | extent_relative_sector_num = sector_num - extent_begin_sector; | |
1364 | index_in_cluster = extent_relative_sector_num % extent->cluster_sectors; | |
b3976d3c FZ |
1365 | n = extent->cluster_sectors - index_in_cluster; |
1366 | if (n > nb_sectors) { | |
1367 | n = nb_sectors; | |
1368 | } | |
cdeaf1f1 FZ |
1369 | if (zeroed) { |
1370 | /* Do zeroed write, buf is ignored */ | |
1371 | if (extent->has_zero_grain && | |
1372 | index_in_cluster == 0 && | |
1373 | n >= extent->cluster_sectors) { | |
1374 | n = extent->cluster_sectors; | |
1375 | if (!zero_dry_run) { | |
1376 | m_data.offset = VMDK_GTE_ZEROED; | |
1377 | /* update L2 tables */ | |
1378 | if (vmdk_L2update(extent, &m_data) != VMDK_OK) { | |
1379 | return -EIO; | |
1380 | } | |
1381 | } | |
1382 | } else { | |
1383 | return -ENOTSUP; | |
1384 | } | |
1385 | } else { | |
1386 | ret = vmdk_write_extent(extent, | |
1387 | cluster_offset, index_in_cluster * 512, | |
1388 | buf, n, sector_num); | |
1389 | if (ret) { | |
1390 | return ret; | |
1391 | } | |
1392 | if (m_data.valid) { | |
1393 | /* update L2 tables */ | |
1394 | if (vmdk_L2update(extent, &m_data) != VMDK_OK) { | |
1395 | return -EIO; | |
1396 | } | |
b3976d3c | 1397 | } |
630530a6 | 1398 | } |
ff1afc72 FB |
1399 | nb_sectors -= n; |
1400 | sector_num += n; | |
1401 | buf += n * 512; | |
5f4da8c0 | 1402 | |
ae261c86 FZ |
1403 | /* update CID on the first write every time the virtual disk is |
1404 | * opened */ | |
69b4d86d | 1405 | if (!s->cid_updated) { |
99f1835d KW |
1406 | ret = vmdk_write_cid(bs, time(NULL)); |
1407 | if (ret < 0) { | |
1408 | return ret; | |
1409 | } | |
69b4d86d | 1410 | s->cid_updated = true; |
5f4da8c0 | 1411 | } |
ff1afc72 FB |
1412 | } |
1413 | return 0; | |
ea2384d3 FB |
1414 | } |
1415 | ||
e183ef75 PB |
1416 | static coroutine_fn int vmdk_co_write(BlockDriverState *bs, int64_t sector_num, |
1417 | const uint8_t *buf, int nb_sectors) | |
1418 | { | |
1419 | int ret; | |
1420 | BDRVVmdkState *s = bs->opaque; | |
1421 | qemu_co_mutex_lock(&s->lock); | |
cdeaf1f1 FZ |
1422 | ret = vmdk_write(bs, sector_num, buf, nb_sectors, false, false); |
1423 | qemu_co_mutex_unlock(&s->lock); | |
1424 | return ret; | |
1425 | } | |
1426 | ||
1427 | static int coroutine_fn vmdk_co_write_zeroes(BlockDriverState *bs, | |
1428 | int64_t sector_num, | |
aa7bfbff PL |
1429 | int nb_sectors, |
1430 | BdrvRequestFlags flags) | |
cdeaf1f1 FZ |
1431 | { |
1432 | int ret; | |
1433 | BDRVVmdkState *s = bs->opaque; | |
1434 | qemu_co_mutex_lock(&s->lock); | |
8e507243 FZ |
1435 | /* write zeroes could fail if sectors not aligned to cluster, test it with |
1436 | * dry_run == true before really updating image */ | |
cdeaf1f1 FZ |
1437 | ret = vmdk_write(bs, sector_num, NULL, nb_sectors, true, true); |
1438 | if (!ret) { | |
1439 | ret = vmdk_write(bs, sector_num, NULL, nb_sectors, true, false); | |
1440 | } | |
e183ef75 PB |
1441 | qemu_co_mutex_unlock(&s->lock); |
1442 | return ret; | |
1443 | } | |
1444 | ||
6c031aac | 1445 | static int vmdk_create_extent(const char *filename, int64_t filesize, |
69e0b6df | 1446 | bool flat, bool compress, bool zeroed_grain) |
8979b227 | 1447 | { |
f66fd6c3 FZ |
1448 | int ret, i; |
1449 | int fd = 0; | |
8979b227 FB |
1450 | VMDK4Header header; |
1451 | uint32_t tmp, magic, grains, gd_size, gt_size, gt_count; | |
0e7e1989 | 1452 | |
6165f4d8 CB |
1453 | fd = qemu_open(filename, |
1454 | O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE, | |
1455 | 0644); | |
f66fd6c3 FZ |
1456 | if (fd < 0) { |
1457 | return -errno; | |
0e7e1989 | 1458 | } |
f66fd6c3 FZ |
1459 | if (flat) { |
1460 | ret = ftruncate(fd, filesize); | |
1461 | if (ret < 0) { | |
1462 | ret = -errno; | |
1463 | } | |
1464 | goto exit; | |
5f4da8c0 | 1465 | } |
8979b227 FB |
1466 | magic = cpu_to_be32(VMDK4_MAGIC); |
1467 | memset(&header, 0, sizeof(header)); | |
69e0b6df | 1468 | header.version = zeroed_grain ? 2 : 1; |
95b0aa42 | 1469 | header.flags = VMDK4_FLAG_RGD | VMDK4_FLAG_NL_DETECT |
69e0b6df FZ |
1470 | | (compress ? VMDK4_FLAG_COMPRESS | VMDK4_FLAG_MARKER : 0) |
1471 | | (zeroed_grain ? VMDK4_FLAG_ZERO_GRAIN : 0); | |
6c031aac | 1472 | header.compressAlgorithm = compress ? VMDK4_COMPRESSION_DEFLATE : 0; |
f66fd6c3 | 1473 | header.capacity = filesize / 512; |
16372ff0 | 1474 | header.granularity = 128; |
ca8804ce | 1475 | header.num_gtes_per_gt = 512; |
8979b227 | 1476 | |
f66fd6c3 | 1477 | grains = (filesize / 512 + header.granularity - 1) / header.granularity; |
ca8804ce | 1478 | gt_size = ((header.num_gtes_per_gt * sizeof(uint32_t)) + 511) >> 9; |
f66fd6c3 | 1479 | gt_count = |
ca8804ce | 1480 | (grains + header.num_gtes_per_gt - 1) / header.num_gtes_per_gt; |
8979b227 FB |
1481 | gd_size = (gt_count * sizeof(uint32_t) + 511) >> 9; |
1482 | ||
1483 | header.desc_offset = 1; | |
1484 | header.desc_size = 20; | |
1485 | header.rgd_offset = header.desc_offset + header.desc_size; | |
1486 | header.gd_offset = header.rgd_offset + gd_size + (gt_size * gt_count); | |
1487 | header.grain_offset = | |
1488 | ((header.gd_offset + gd_size + (gt_size * gt_count) + | |
1489 | header.granularity - 1) / header.granularity) * | |
1490 | header.granularity; | |
16372ff0 AG |
1491 | /* swap endianness for all header fields */ |
1492 | header.version = cpu_to_le32(header.version); | |
1493 | header.flags = cpu_to_le32(header.flags); | |
1494 | header.capacity = cpu_to_le64(header.capacity); | |
1495 | header.granularity = cpu_to_le64(header.granularity); | |
ca8804ce | 1496 | header.num_gtes_per_gt = cpu_to_le32(header.num_gtes_per_gt); |
8979b227 FB |
1497 | header.desc_offset = cpu_to_le64(header.desc_offset); |
1498 | header.desc_size = cpu_to_le64(header.desc_size); | |
1499 | header.rgd_offset = cpu_to_le64(header.rgd_offset); | |
1500 | header.gd_offset = cpu_to_le64(header.gd_offset); | |
1501 | header.grain_offset = cpu_to_le64(header.grain_offset); | |
6c031aac | 1502 | header.compressAlgorithm = cpu_to_le16(header.compressAlgorithm); |
8979b227 FB |
1503 | |
1504 | header.check_bytes[0] = 0xa; | |
1505 | header.check_bytes[1] = 0x20; | |
1506 | header.check_bytes[2] = 0xd; | |
1507 | header.check_bytes[3] = 0xa; | |
3b46e624 TS |
1508 | |
1509 | /* write all the data */ | |
1640366c KS |
1510 | ret = qemu_write_full(fd, &magic, sizeof(magic)); |
1511 | if (ret != sizeof(magic)) { | |
b781cce5 | 1512 | ret = -errno; |
1640366c KS |
1513 | goto exit; |
1514 | } | |
1515 | ret = qemu_write_full(fd, &header, sizeof(header)); | |
1516 | if (ret != sizeof(header)) { | |
b781cce5 | 1517 | ret = -errno; |
1640366c KS |
1518 | goto exit; |
1519 | } | |
8979b227 | 1520 | |
16372ff0 | 1521 | ret = ftruncate(fd, le64_to_cpu(header.grain_offset) << 9); |
1640366c | 1522 | if (ret < 0) { |
b781cce5 | 1523 | ret = -errno; |
1640366c KS |
1524 | goto exit; |
1525 | } | |
8979b227 FB |
1526 | |
1527 | /* write grain directory */ | |
1528 | lseek(fd, le64_to_cpu(header.rgd_offset) << 9, SEEK_SET); | |
16372ff0 | 1529 | for (i = 0, tmp = le64_to_cpu(header.rgd_offset) + gd_size; |
1640366c KS |
1530 | i < gt_count; i++, tmp += gt_size) { |
1531 | ret = qemu_write_full(fd, &tmp, sizeof(tmp)); | |
1532 | if (ret != sizeof(tmp)) { | |
b781cce5 | 1533 | ret = -errno; |
1640366c KS |
1534 | goto exit; |
1535 | } | |
1536 | } | |
3b46e624 | 1537 | |
8979b227 FB |
1538 | /* write backup grain directory */ |
1539 | lseek(fd, le64_to_cpu(header.gd_offset) << 9, SEEK_SET); | |
16372ff0 | 1540 | for (i = 0, tmp = le64_to_cpu(header.gd_offset) + gd_size; |
1640366c KS |
1541 | i < gt_count; i++, tmp += gt_size) { |
1542 | ret = qemu_write_full(fd, &tmp, sizeof(tmp)); | |
1543 | if (ret != sizeof(tmp)) { | |
b781cce5 | 1544 | ret = -errno; |
1640366c KS |
1545 | goto exit; |
1546 | } | |
1547 | } | |
8979b227 | 1548 | |
f66fd6c3 FZ |
1549 | ret = 0; |
1550 | exit: | |
2e1e79da | 1551 | qemu_close(fd); |
f66fd6c3 FZ |
1552 | return ret; |
1553 | } | |
1554 | ||
1555 | static int filename_decompose(const char *filename, char *path, char *prefix, | |
4823970b | 1556 | char *postfix, size_t buf_len, Error **errp) |
f66fd6c3 FZ |
1557 | { |
1558 | const char *p, *q; | |
1559 | ||
1560 | if (filename == NULL || !strlen(filename)) { | |
4823970b | 1561 | error_setg(errp, "No filename provided"); |
65f74725 | 1562 | return VMDK_ERROR; |
f66fd6c3 FZ |
1563 | } |
1564 | p = strrchr(filename, '/'); | |
1565 | if (p == NULL) { | |
1566 | p = strrchr(filename, '\\'); | |
1567 | } | |
1568 | if (p == NULL) { | |
1569 | p = strrchr(filename, ':'); | |
1570 | } | |
1571 | if (p != NULL) { | |
1572 | p++; | |
1573 | if (p - filename >= buf_len) { | |
65f74725 | 1574 | return VMDK_ERROR; |
f66fd6c3 FZ |
1575 | } |
1576 | pstrcpy(path, p - filename + 1, filename); | |
1577 | } else { | |
1578 | p = filename; | |
1579 | path[0] = '\0'; | |
1580 | } | |
1581 | q = strrchr(p, '.'); | |
1582 | if (q == NULL) { | |
1583 | pstrcpy(prefix, buf_len, p); | |
1584 | postfix[0] = '\0'; | |
1585 | } else { | |
1586 | if (q - p >= buf_len) { | |
65f74725 | 1587 | return VMDK_ERROR; |
f66fd6c3 FZ |
1588 | } |
1589 | pstrcpy(prefix, q - p + 1, p); | |
1590 | pstrcpy(postfix, buf_len, q); | |
1591 | } | |
65f74725 | 1592 | return VMDK_OK; |
f66fd6c3 FZ |
1593 | } |
1594 | ||
d5124c00 HR |
1595 | static int vmdk_create(const char *filename, QEMUOptionParameter *options, |
1596 | Error **errp) | |
f66fd6c3 FZ |
1597 | { |
1598 | int fd, idx = 0; | |
1599 | char desc[BUF_SIZE]; | |
1600 | int64_t total_size = 0, filesize; | |
7f2039f6 | 1601 | const char *adapter_type = NULL; |
f66fd6c3 FZ |
1602 | const char *backing_file = NULL; |
1603 | const char *fmt = NULL; | |
1604 | int flags = 0; | |
1605 | int ret = 0; | |
6c031aac | 1606 | bool flat, split, compress; |
f66fd6c3 FZ |
1607 | char ext_desc_lines[BUF_SIZE] = ""; |
1608 | char path[PATH_MAX], prefix[PATH_MAX], postfix[PATH_MAX]; | |
1609 | const int64_t split_size = 0x80000000; /* VMDK has constant split size */ | |
1610 | const char *desc_extent_line; | |
1611 | char parent_desc_line[BUF_SIZE] = ""; | |
1612 | uint32_t parent_cid = 0xffffffff; | |
7f2039f6 | 1613 | uint32_t number_heads = 16; |
69e0b6df | 1614 | bool zeroed_grain = false; |
f66fd6c3 FZ |
1615 | const char desc_template[] = |
1616 | "# Disk DescriptorFile\n" | |
1617 | "version=1\n" | |
1618 | "CID=%x\n" | |
1619 | "parentCID=%x\n" | |
1620 | "createType=\"%s\"\n" | |
1621 | "%s" | |
1622 | "\n" | |
1623 | "# Extent description\n" | |
1624 | "%s" | |
1625 | "\n" | |
1626 | "# The Disk Data Base\n" | |
1627 | "#DDB\n" | |
1628 | "\n" | |
1629 | "ddb.virtualHWVersion = \"%d\"\n" | |
1630 | "ddb.geometry.cylinders = \"%" PRId64 "\"\n" | |
7f2039f6 | 1631 | "ddb.geometry.heads = \"%d\"\n" |
f66fd6c3 | 1632 | "ddb.geometry.sectors = \"63\"\n" |
7f2039f6 | 1633 | "ddb.adapterType = \"%s\"\n"; |
f66fd6c3 | 1634 | |
4823970b | 1635 | if (filename_decompose(filename, path, prefix, postfix, PATH_MAX, errp)) { |
f66fd6c3 FZ |
1636 | return -EINVAL; |
1637 | } | |
1638 | /* Read out options */ | |
1639 | while (options && options->name) { | |
1640 | if (!strcmp(options->name, BLOCK_OPT_SIZE)) { | |
1641 | total_size = options->value.n; | |
7f2039f6 OP |
1642 | } else if (!strcmp(options->name, BLOCK_OPT_ADAPTER_TYPE)) { |
1643 | adapter_type = options->value.s; | |
f66fd6c3 FZ |
1644 | } else if (!strcmp(options->name, BLOCK_OPT_BACKING_FILE)) { |
1645 | backing_file = options->value.s; | |
1646 | } else if (!strcmp(options->name, BLOCK_OPT_COMPAT6)) { | |
1647 | flags |= options->value.n ? BLOCK_FLAG_COMPAT6 : 0; | |
1648 | } else if (!strcmp(options->name, BLOCK_OPT_SUBFMT)) { | |
1649 | fmt = options->value.s; | |
69e0b6df FZ |
1650 | } else if (!strcmp(options->name, BLOCK_OPT_ZEROED_GRAIN)) { |
1651 | zeroed_grain |= options->value.n; | |
f66fd6c3 FZ |
1652 | } |
1653 | options++; | |
1654 | } | |
7f2039f6 OP |
1655 | if (!adapter_type) { |
1656 | adapter_type = "ide"; | |
1657 | } else if (strcmp(adapter_type, "ide") && | |
1658 | strcmp(adapter_type, "buslogic") && | |
1659 | strcmp(adapter_type, "lsilogic") && | |
1660 | strcmp(adapter_type, "legacyESX")) { | |
4823970b | 1661 | error_setg(errp, "Unknown adapter type: '%s'", adapter_type); |
7f2039f6 OP |
1662 | return -EINVAL; |
1663 | } | |
1664 | if (strcmp(adapter_type, "ide") != 0) { | |
1665 | /* that's the number of heads with which vmware operates when | |
1666 | creating, exporting, etc. vmdk files with a non-ide adapter type */ | |
1667 | number_heads = 255; | |
1668 | } | |
f66fd6c3 FZ |
1669 | if (!fmt) { |
1670 | /* Default format to monolithicSparse */ | |
1671 | fmt = "monolithicSparse"; | |
1672 | } else if (strcmp(fmt, "monolithicFlat") && | |
1673 | strcmp(fmt, "monolithicSparse") && | |
1674 | strcmp(fmt, "twoGbMaxExtentSparse") && | |
6c031aac FZ |
1675 | strcmp(fmt, "twoGbMaxExtentFlat") && |
1676 | strcmp(fmt, "streamOptimized")) { | |
4823970b | 1677 | error_setg(errp, "Unknown subformat: '%s'", fmt); |
f66fd6c3 FZ |
1678 | return -EINVAL; |
1679 | } | |
1680 | split = !(strcmp(fmt, "twoGbMaxExtentFlat") && | |
1681 | strcmp(fmt, "twoGbMaxExtentSparse")); | |
1682 | flat = !(strcmp(fmt, "monolithicFlat") && | |
1683 | strcmp(fmt, "twoGbMaxExtentFlat")); | |
6c031aac | 1684 | compress = !strcmp(fmt, "streamOptimized"); |
f66fd6c3 FZ |
1685 | if (flat) { |
1686 | desc_extent_line = "RW %lld FLAT \"%s\" 0\n"; | |
1687 | } else { | |
1688 | desc_extent_line = "RW %lld SPARSE \"%s\"\n"; | |
1689 | } | |
1690 | if (flat && backing_file) { | |
4823970b | 1691 | error_setg(errp, "Flat image can't have backing file"); |
f66fd6c3 FZ |
1692 | return -ENOTSUP; |
1693 | } | |
52c8d629 FZ |
1694 | if (flat && zeroed_grain) { |
1695 | error_setg(errp, "Flat image can't enable zeroed grain"); | |
1696 | return -ENOTSUP; | |
1697 | } | |
f66fd6c3 | 1698 | if (backing_file) { |
f66fd6c3 | 1699 | BlockDriverState *bs = bdrv_new(""); |
c9fbb99d | 1700 | ret = bdrv_open(bs, backing_file, NULL, BDRV_O_NO_BACKING, NULL, errp); |
f66fd6c3 | 1701 | if (ret != 0) { |
4f6fd349 | 1702 | bdrv_unref(bs); |
f66fd6c3 FZ |
1703 | return ret; |
1704 | } | |
1705 | if (strcmp(bs->drv->format_name, "vmdk")) { | |
4f6fd349 | 1706 | bdrv_unref(bs); |
f66fd6c3 FZ |
1707 | return -EINVAL; |
1708 | } | |
f66fd6c3 | 1709 | parent_cid = vmdk_read_cid(bs, 0); |
4f6fd349 | 1710 | bdrv_unref(bs); |
f66fd6c3 | 1711 | snprintf(parent_desc_line, sizeof(parent_desc_line), |
8ed610a1 | 1712 | "parentFileNameHint=\"%s\"", backing_file); |
f66fd6c3 FZ |
1713 | } |
1714 | ||
1715 | /* Create extents */ | |
1716 | filesize = total_size; | |
1717 | while (filesize > 0) { | |
1718 | char desc_line[BUF_SIZE]; | |
1719 | char ext_filename[PATH_MAX]; | |
1720 | char desc_filename[PATH_MAX]; | |
1721 | int64_t size = filesize; | |
1722 | ||
1723 | if (split && size > split_size) { | |
1724 | size = split_size; | |
1725 | } | |
1726 | if (split) { | |
1727 | snprintf(desc_filename, sizeof(desc_filename), "%s-%c%03d%s", | |
1728 | prefix, flat ? 'f' : 's', ++idx, postfix); | |
1729 | } else if (flat) { | |
1730 | snprintf(desc_filename, sizeof(desc_filename), "%s-flat%s", | |
1731 | prefix, postfix); | |
1732 | } else { | |
1733 | snprintf(desc_filename, sizeof(desc_filename), "%s%s", | |
1734 | prefix, postfix); | |
1735 | } | |
1736 | snprintf(ext_filename, sizeof(ext_filename), "%s%s", | |
1737 | path, desc_filename); | |
1738 | ||
69e0b6df FZ |
1739 | if (vmdk_create_extent(ext_filename, size, |
1740 | flat, compress, zeroed_grain)) { | |
f66fd6c3 FZ |
1741 | return -EINVAL; |
1742 | } | |
1743 | filesize -= size; | |
1744 | ||
1745 | /* Format description line */ | |
1746 | snprintf(desc_line, sizeof(desc_line), | |
1747 | desc_extent_line, size / 512, desc_filename); | |
1748 | pstrcat(ext_desc_lines, sizeof(ext_desc_lines), desc_line); | |
1749 | } | |
1750 | /* generate descriptor file */ | |
1751 | snprintf(desc, sizeof(desc), desc_template, | |
1752 | (unsigned int)time(NULL), | |
1753 | parent_cid, | |
1754 | fmt, | |
1755 | parent_desc_line, | |
1756 | ext_desc_lines, | |
1757 | (flags & BLOCK_FLAG_COMPAT6 ? 6 : 4), | |
7f2039f6 OP |
1758 | total_size / (int64_t)(63 * number_heads * 512), number_heads, |
1759 | adapter_type); | |
f66fd6c3 | 1760 | if (split || flat) { |
6165f4d8 CB |
1761 | fd = qemu_open(filename, |
1762 | O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE, | |
1763 | 0644); | |
f66fd6c3 | 1764 | } else { |
6165f4d8 CB |
1765 | fd = qemu_open(filename, |
1766 | O_WRONLY | O_BINARY | O_LARGEFILE, | |
1767 | 0644); | |
f66fd6c3 FZ |
1768 | } |
1769 | if (fd < 0) { | |
1770 | return -errno; | |
1771 | } | |
1772 | /* the descriptor offset = 0x200 */ | |
1773 | if (!split && !flat && 0x200 != lseek(fd, 0x200, SEEK_SET)) { | |
1774 | ret = -errno; | |
1775 | goto exit; | |
1776 | } | |
1640366c KS |
1777 | ret = qemu_write_full(fd, desc, strlen(desc)); |
1778 | if (ret != strlen(desc)) { | |
b781cce5 | 1779 | ret = -errno; |
1640366c KS |
1780 | goto exit; |
1781 | } | |
1640366c KS |
1782 | ret = 0; |
1783 | exit: | |
2e1e79da | 1784 | qemu_close(fd); |
1640366c | 1785 | return ret; |
8979b227 FB |
1786 | } |
1787 | ||
e2731add | 1788 | static void vmdk_close(BlockDriverState *bs) |
ea2384d3 | 1789 | { |
2bc3166c KW |
1790 | BDRVVmdkState *s = bs->opaque; |
1791 | ||
b3976d3c | 1792 | vmdk_free_extents(bs); |
f4c129a3 | 1793 | g_free(s->create_type); |
2bc3166c KW |
1794 | |
1795 | migrate_del_blocker(s->migration_blocker); | |
1796 | error_free(s->migration_blocker); | |
ea2384d3 FB |
1797 | } |
1798 | ||
8b94ff85 | 1799 | static coroutine_fn int vmdk_co_flush(BlockDriverState *bs) |
7a6cba61 | 1800 | { |
333c574d | 1801 | BDRVVmdkState *s = bs->opaque; |
29cdb251 PB |
1802 | int i, err; |
1803 | int ret = 0; | |
333c574d | 1804 | |
333c574d | 1805 | for (i = 0; i < s->num_extents; i++) { |
8b94ff85 | 1806 | err = bdrv_co_flush(s->extents[i].file); |
333c574d FZ |
1807 | if (err < 0) { |
1808 | ret = err; | |
1809 | } | |
1810 | } | |
1811 | return ret; | |
7a6cba61 PB |
1812 | } |
1813 | ||
4a1d5e1f FZ |
1814 | static int64_t vmdk_get_allocated_file_size(BlockDriverState *bs) |
1815 | { | |
1816 | int i; | |
1817 | int64_t ret = 0; | |
1818 | int64_t r; | |
1819 | BDRVVmdkState *s = bs->opaque; | |
1820 | ||
1821 | ret = bdrv_get_allocated_file_size(bs->file); | |
1822 | if (ret < 0) { | |
1823 | return ret; | |
1824 | } | |
1825 | for (i = 0; i < s->num_extents; i++) { | |
1826 | if (s->extents[i].file == bs->file) { | |
1827 | continue; | |
1828 | } | |
1829 | r = bdrv_get_allocated_file_size(s->extents[i].file); | |
1830 | if (r < 0) { | |
1831 | return r; | |
1832 | } | |
1833 | ret += r; | |
1834 | } | |
1835 | return ret; | |
1836 | } | |
0e7e1989 | 1837 | |
da7a50f9 FZ |
1838 | static int vmdk_has_zero_init(BlockDriverState *bs) |
1839 | { | |
1840 | int i; | |
1841 | BDRVVmdkState *s = bs->opaque; | |
1842 | ||
1843 | /* If has a flat extent and its underlying storage doesn't have zero init, | |
1844 | * return 0. */ | |
1845 | for (i = 0; i < s->num_extents; i++) { | |
1846 | if (s->extents[i].flat) { | |
1847 | if (!bdrv_has_zero_init(s->extents[i].file)) { | |
1848 | return 0; | |
1849 | } | |
1850 | } | |
1851 | } | |
1852 | return 1; | |
1853 | } | |
1854 | ||
f4c129a3 FZ |
1855 | static ImageInfo *vmdk_get_extent_info(VmdkExtent *extent) |
1856 | { | |
1857 | ImageInfo *info = g_new0(ImageInfo, 1); | |
1858 | ||
1859 | *info = (ImageInfo){ | |
1860 | .filename = g_strdup(extent->file->filename), | |
1861 | .format = g_strdup(extent->type), | |
1862 | .virtual_size = extent->sectors * BDRV_SECTOR_SIZE, | |
1863 | .compressed = extent->compressed, | |
1864 | .has_compressed = extent->compressed, | |
1865 | .cluster_size = extent->cluster_sectors * BDRV_SECTOR_SIZE, | |
1866 | .has_cluster_size = !extent->flat, | |
1867 | }; | |
1868 | ||
1869 | return info; | |
1870 | } | |
1871 | ||
1872 | static ImageInfoSpecific *vmdk_get_specific_info(BlockDriverState *bs) | |
1873 | { | |
1874 | int i; | |
1875 | BDRVVmdkState *s = bs->opaque; | |
1876 | ImageInfoSpecific *spec_info = g_new0(ImageInfoSpecific, 1); | |
1877 | ImageInfoList **next; | |
1878 | ||
1879 | *spec_info = (ImageInfoSpecific){ | |
1880 | .kind = IMAGE_INFO_SPECIFIC_KIND_VMDK, | |
1881 | { | |
1882 | .vmdk = g_new0(ImageInfoSpecificVmdk, 1), | |
1883 | }, | |
1884 | }; | |
1885 | ||
1886 | *spec_info->vmdk = (ImageInfoSpecificVmdk) { | |
1887 | .create_type = g_strdup(s->create_type), | |
1888 | .cid = s->cid, | |
1889 | .parent_cid = s->parent_cid, | |
1890 | }; | |
1891 | ||
1892 | next = &spec_info->vmdk->extents; | |
1893 | for (i = 0; i < s->num_extents; i++) { | |
1894 | *next = g_new0(ImageInfoList, 1); | |
1895 | (*next)->value = vmdk_get_extent_info(&s->extents[i]); | |
1896 | (*next)->next = NULL; | |
1897 | next = &(*next)->next; | |
1898 | } | |
1899 | ||
1900 | return spec_info; | |
1901 | } | |
1902 | ||
0e7e1989 | 1903 | static QEMUOptionParameter vmdk_create_options[] = { |
db08adf5 KW |
1904 | { |
1905 | .name = BLOCK_OPT_SIZE, | |
1906 | .type = OPT_SIZE, | |
1907 | .help = "Virtual disk size" | |
1908 | }, | |
7f2039f6 OP |
1909 | { |
1910 | .name = BLOCK_OPT_ADAPTER_TYPE, | |
1911 | .type = OPT_STRING, | |
1912 | .help = "Virtual adapter type, can be one of " | |
1913 | "ide (default), lsilogic, buslogic or legacyESX" | |
1914 | }, | |
db08adf5 KW |
1915 | { |
1916 | .name = BLOCK_OPT_BACKING_FILE, | |
1917 | .type = OPT_STRING, | |
1918 | .help = "File name of a base image" | |
1919 | }, | |
1920 | { | |
1921 | .name = BLOCK_OPT_COMPAT6, | |
1922 | .type = OPT_FLAG, | |
1923 | .help = "VMDK version 6 image" | |
1924 | }, | |
f66fd6c3 FZ |
1925 | { |
1926 | .name = BLOCK_OPT_SUBFMT, | |
1927 | .type = OPT_STRING, | |
1928 | .help = | |
1929 | "VMDK flat extent format, can be one of " | |
6c031aac | 1930 | "{monolithicSparse (default) | monolithicFlat | twoGbMaxExtentSparse | twoGbMaxExtentFlat | streamOptimized} " |
f66fd6c3 | 1931 | }, |
69e0b6df FZ |
1932 | { |
1933 | .name = BLOCK_OPT_ZEROED_GRAIN, | |
1934 | .type = OPT_FLAG, | |
1935 | .help = "Enable efficient zero writes using the zeroed-grain GTE feature" | |
1936 | }, | |
0e7e1989 KW |
1937 | { NULL } |
1938 | }; | |
1939 | ||
5efa9d5a | 1940 | static BlockDriver bdrv_vmdk = { |
da7a50f9 FZ |
1941 | .format_name = "vmdk", |
1942 | .instance_size = sizeof(BDRVVmdkState), | |
1943 | .bdrv_probe = vmdk_probe, | |
1944 | .bdrv_open = vmdk_open, | |
1945 | .bdrv_reopen_prepare = vmdk_reopen_prepare, | |
1946 | .bdrv_read = vmdk_co_read, | |
1947 | .bdrv_write = vmdk_co_write, | |
1948 | .bdrv_co_write_zeroes = vmdk_co_write_zeroes, | |
1949 | .bdrv_close = vmdk_close, | |
1950 | .bdrv_create = vmdk_create, | |
1951 | .bdrv_co_flush_to_disk = vmdk_co_flush, | |
b6b8a333 | 1952 | .bdrv_co_get_block_status = vmdk_co_get_block_status, |
da7a50f9 FZ |
1953 | .bdrv_get_allocated_file_size = vmdk_get_allocated_file_size, |
1954 | .bdrv_has_zero_init = vmdk_has_zero_init, | |
f4c129a3 | 1955 | .bdrv_get_specific_info = vmdk_get_specific_info, |
da7a50f9 FZ |
1956 | |
1957 | .create_options = vmdk_create_options, | |
ea2384d3 | 1958 | }; |
5efa9d5a AL |
1959 | |
1960 | static void bdrv_vmdk_init(void) | |
1961 | { | |
1962 | bdrv_register(&bdrv_vmdk); | |
1963 | } | |
1964 | ||
1965 | block_init(bdrv_vmdk_init); |