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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> |
e5dc64b8 | 31 | #include <glib.h> |
ea2384d3 | 32 | |
ea2384d3 FB |
33 | #define VMDK3_MAGIC (('C' << 24) | ('O' << 16) | ('W' << 8) | 'D') |
34 | #define VMDK4_MAGIC (('K' << 24) | ('D' << 16) | ('M' << 8) | 'V') | |
432bb170 | 35 | #define VMDK4_COMPRESSION_DEFLATE 1 |
95b0aa42 | 36 | #define VMDK4_FLAG_NL_DETECT (1 << 0) |
bb45ded9 | 37 | #define VMDK4_FLAG_RGD (1 << 1) |
14ead646 FZ |
38 | /* Zeroed-grain enable bit */ |
39 | #define VMDK4_FLAG_ZERO_GRAIN (1 << 2) | |
432bb170 FZ |
40 | #define VMDK4_FLAG_COMPRESS (1 << 16) |
41 | #define VMDK4_FLAG_MARKER (1 << 17) | |
65bd155c | 42 | #define VMDK4_GD_AT_END 0xffffffffffffffffULL |
ea2384d3 | 43 | |
14ead646 | 44 | #define VMDK_GTE_ZEROED 0x1 |
65f74725 FZ |
45 | |
46 | /* VMDK internal error codes */ | |
47 | #define VMDK_OK 0 | |
48 | #define VMDK_ERROR (-1) | |
49 | /* Cluster not allocated */ | |
50 | #define VMDK_UNALLOC (-2) | |
51 | #define VMDK_ZEROED (-3) | |
52 | ||
69e0b6df FZ |
53 | #define BLOCK_OPT_ZEROED_GRAIN "zeroed_grain" |
54 | ||
ea2384d3 FB |
55 | typedef struct { |
56 | uint32_t version; | |
57 | uint32_t flags; | |
58 | uint32_t disk_sectors; | |
59 | uint32_t granularity; | |
60 | uint32_t l1dir_offset; | |
61 | uint32_t l1dir_size; | |
62 | uint32_t file_sectors; | |
63 | uint32_t cylinders; | |
64 | uint32_t heads; | |
65 | uint32_t sectors_per_track; | |
5d8caa54 | 66 | } QEMU_PACKED VMDK3Header; |
ea2384d3 FB |
67 | |
68 | typedef struct { | |
69 | uint32_t version; | |
70 | uint32_t flags; | |
e98768d4 FZ |
71 | uint64_t capacity; |
72 | uint64_t granularity; | |
73 | uint64_t desc_offset; | |
74 | uint64_t desc_size; | |
ca8804ce FZ |
75 | /* Number of GrainTableEntries per GrainTable */ |
76 | uint32_t num_gtes_per_gt; | |
e98768d4 FZ |
77 | uint64_t rgd_offset; |
78 | uint64_t gd_offset; | |
79 | uint64_t grain_offset; | |
ea2384d3 FB |
80 | char filler[1]; |
81 | char check_bytes[4]; | |
432bb170 | 82 | uint16_t compressAlgorithm; |
541dc0d4 | 83 | } QEMU_PACKED VMDK4Header; |
ea2384d3 FB |
84 | |
85 | #define L2_CACHE_SIZE 16 | |
86 | ||
b3976d3c FZ |
87 | typedef struct VmdkExtent { |
88 | BlockDriverState *file; | |
89 | bool flat; | |
432bb170 FZ |
90 | bool compressed; |
91 | bool has_marker; | |
14ead646 FZ |
92 | bool has_zero_grain; |
93 | int version; | |
b3976d3c FZ |
94 | int64_t sectors; |
95 | int64_t end_sector; | |
7fa60fa3 | 96 | int64_t flat_start_offset; |
ea2384d3 | 97 | int64_t l1_table_offset; |
ff1afc72 | 98 | int64_t l1_backup_table_offset; |
ea2384d3 | 99 | uint32_t *l1_table; |
ff1afc72 | 100 | uint32_t *l1_backup_table; |
ea2384d3 FB |
101 | unsigned int l1_size; |
102 | uint32_t l1_entry_sectors; | |
103 | ||
104 | unsigned int l2_size; | |
105 | uint32_t *l2_cache; | |
106 | uint32_t l2_cache_offsets[L2_CACHE_SIZE]; | |
107 | uint32_t l2_cache_counts[L2_CACHE_SIZE]; | |
108 | ||
301c7d38 | 109 | int64_t cluster_sectors; |
c6ac36e1 | 110 | int64_t next_cluster_sector; |
f4c129a3 | 111 | char *type; |
b3976d3c FZ |
112 | } VmdkExtent; |
113 | ||
114 | typedef struct BDRVVmdkState { | |
848c66e8 | 115 | CoMutex lock; |
e98768d4 | 116 | uint64_t desc_offset; |
69b4d86d | 117 | bool cid_updated; |
c338b6ad | 118 | bool cid_checked; |
f4c129a3 | 119 | uint32_t cid; |
5f4da8c0 | 120 | uint32_t parent_cid; |
b3976d3c FZ |
121 | int num_extents; |
122 | /* Extent array with num_extents entries, ascend ordered by address */ | |
123 | VmdkExtent *extents; | |
2bc3166c | 124 | Error *migration_blocker; |
f4c129a3 | 125 | char *create_type; |
ea2384d3 FB |
126 | } BDRVVmdkState; |
127 | ||
630530a6 | 128 | typedef struct VmdkMetaData { |
630530a6 TS |
129 | unsigned int l1_index; |
130 | unsigned int l2_index; | |
131 | unsigned int l2_offset; | |
132 | int valid; | |
cdeaf1f1 | 133 | uint32_t *l2_cache_entry; |
630530a6 TS |
134 | } VmdkMetaData; |
135 | ||
432bb170 FZ |
136 | typedef struct VmdkGrainMarker { |
137 | uint64_t lba; | |
138 | uint32_t size; | |
139 | uint8_t data[0]; | |
5d8caa54 | 140 | } QEMU_PACKED VmdkGrainMarker; |
432bb170 | 141 | |
65bd155c KW |
142 | enum { |
143 | MARKER_END_OF_STREAM = 0, | |
144 | MARKER_GRAIN_TABLE = 1, | |
145 | MARKER_GRAIN_DIRECTORY = 2, | |
146 | MARKER_FOOTER = 3, | |
147 | }; | |
148 | ||
ea2384d3 FB |
149 | static int vmdk_probe(const uint8_t *buf, int buf_size, const char *filename) |
150 | { | |
151 | uint32_t magic; | |
152 | ||
ae261c86 | 153 | if (buf_size < 4) { |
ea2384d3 | 154 | return 0; |
ae261c86 | 155 | } |
ea2384d3 FB |
156 | magic = be32_to_cpu(*(uint32_t *)buf); |
157 | if (magic == VMDK3_MAGIC || | |
01fc99d6 | 158 | magic == VMDK4_MAGIC) { |
ea2384d3 | 159 | return 100; |
01fc99d6 FZ |
160 | } else { |
161 | const char *p = (const char *)buf; | |
162 | const char *end = p + buf_size; | |
163 | while (p < end) { | |
164 | if (*p == '#') { | |
165 | /* skip comment line */ | |
166 | while (p < end && *p != '\n') { | |
167 | p++; | |
168 | } | |
169 | p++; | |
170 | continue; | |
171 | } | |
172 | if (*p == ' ') { | |
173 | while (p < end && *p == ' ') { | |
174 | p++; | |
175 | } | |
176 | /* skip '\r' if windows line endings used. */ | |
177 | if (p < end && *p == '\r') { | |
178 | p++; | |
179 | } | |
180 | /* only accept blank lines before 'version=' line */ | |
181 | if (p == end || *p != '\n') { | |
182 | return 0; | |
183 | } | |
184 | p++; | |
185 | continue; | |
186 | } | |
187 | if (end - p >= strlen("version=X\n")) { | |
188 | if (strncmp("version=1\n", p, strlen("version=1\n")) == 0 || | |
189 | strncmp("version=2\n", p, strlen("version=2\n")) == 0) { | |
190 | return 100; | |
191 | } | |
192 | } | |
193 | if (end - p >= strlen("version=X\r\n")) { | |
194 | if (strncmp("version=1\r\n", p, strlen("version=1\r\n")) == 0 || | |
195 | strncmp("version=2\r\n", p, strlen("version=2\r\n")) == 0) { | |
196 | return 100; | |
197 | } | |
198 | } | |
199 | return 0; | |
200 | } | |
ea2384d3 | 201 | return 0; |
01fc99d6 | 202 | } |
ea2384d3 FB |
203 | } |
204 | ||
3b46e624 | 205 | #define SECTOR_SIZE 512 |
f66fd6c3 FZ |
206 | #define DESC_SIZE (20 * SECTOR_SIZE) /* 20 sectors of 512 bytes each */ |
207 | #define BUF_SIZE 4096 | |
208 | #define HEADER_SIZE 512 /* first sector of 512 bytes */ | |
5f4da8c0 | 209 | |
b3976d3c FZ |
210 | static void vmdk_free_extents(BlockDriverState *bs) |
211 | { | |
212 | int i; | |
213 | BDRVVmdkState *s = bs->opaque; | |
b3c0bfb6 | 214 | VmdkExtent *e; |
b3976d3c FZ |
215 | |
216 | for (i = 0; i < s->num_extents; i++) { | |
b3c0bfb6 FZ |
217 | e = &s->extents[i]; |
218 | g_free(e->l1_table); | |
219 | g_free(e->l2_cache); | |
220 | g_free(e->l1_backup_table); | |
f4c129a3 | 221 | g_free(e->type); |
b3c0bfb6 | 222 | if (e->file != bs->file) { |
4f6fd349 | 223 | bdrv_unref(e->file); |
b3c0bfb6 | 224 | } |
b3976d3c | 225 | } |
7267c094 | 226 | g_free(s->extents); |
b3976d3c FZ |
227 | } |
228 | ||
86c6b429 FZ |
229 | static void vmdk_free_last_extent(BlockDriverState *bs) |
230 | { | |
231 | BDRVVmdkState *s = bs->opaque; | |
232 | ||
233 | if (s->num_extents == 0) { | |
234 | return; | |
235 | } | |
236 | s->num_extents--; | |
5839e53b | 237 | s->extents = g_renew(VmdkExtent, s->extents, s->num_extents); |
86c6b429 FZ |
238 | } |
239 | ||
5f4da8c0 | 240 | static uint32_t vmdk_read_cid(BlockDriverState *bs, int parent) |
ea2384d3 | 241 | { |
5f4da8c0 | 242 | char desc[DESC_SIZE]; |
8379e46d | 243 | uint32_t cid = 0xffffffff; |
7ccfb2eb | 244 | const char *p_name, *cid_str; |
5f4da8c0 | 245 | size_t cid_str_size; |
e1da9b24 | 246 | BDRVVmdkState *s = bs->opaque; |
99f1835d | 247 | int ret; |
5f4da8c0 | 248 | |
99f1835d KW |
249 | ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE); |
250 | if (ret < 0) { | |
5f4da8c0 | 251 | return 0; |
e1da9b24 | 252 | } |
5f4da8c0 TS |
253 | |
254 | if (parent) { | |
255 | cid_str = "parentCID"; | |
256 | cid_str_size = sizeof("parentCID"); | |
257 | } else { | |
258 | cid_str = "CID"; | |
259 | cid_str_size = sizeof("CID"); | |
260 | } | |
261 | ||
93897b9f | 262 | desc[DESC_SIZE - 1] = '\0'; |
ae261c86 FZ |
263 | p_name = strstr(desc, cid_str); |
264 | if (p_name != NULL) { | |
5f4da8c0 | 265 | p_name += cid_str_size; |
9b17031a | 266 | sscanf(p_name, "%" SCNx32, &cid); |
5f4da8c0 TS |
267 | } |
268 | ||
269 | return cid; | |
270 | } | |
271 | ||
272 | static int vmdk_write_cid(BlockDriverState *bs, uint32_t cid) | |
273 | { | |
5f4da8c0 TS |
274 | char desc[DESC_SIZE], tmp_desc[DESC_SIZE]; |
275 | char *p_name, *tmp_str; | |
e1da9b24 | 276 | BDRVVmdkState *s = bs->opaque; |
99f1835d | 277 | int ret; |
5f4da8c0 | 278 | |
99f1835d KW |
279 | ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE); |
280 | if (ret < 0) { | |
281 | return ret; | |
e1da9b24 | 282 | } |
5f4da8c0 | 283 | |
93897b9f | 284 | desc[DESC_SIZE - 1] = '\0'; |
ae261c86 | 285 | tmp_str = strstr(desc, "parentCID"); |
93897b9f KW |
286 | if (tmp_str == NULL) { |
287 | return -EINVAL; | |
288 | } | |
289 | ||
363a37d5 | 290 | pstrcpy(tmp_desc, sizeof(tmp_desc), tmp_str); |
ae261c86 FZ |
291 | p_name = strstr(desc, "CID"); |
292 | if (p_name != NULL) { | |
5f4da8c0 | 293 | p_name += sizeof("CID"); |
9b17031a | 294 | snprintf(p_name, sizeof(desc) - (p_name - desc), "%" PRIx32 "\n", cid); |
363a37d5 | 295 | pstrcat(desc, sizeof(desc), tmp_desc); |
5f4da8c0 TS |
296 | } |
297 | ||
99f1835d KW |
298 | ret = bdrv_pwrite_sync(bs->file, s->desc_offset, desc, DESC_SIZE); |
299 | if (ret < 0) { | |
300 | return ret; | |
e1da9b24 | 301 | } |
99f1835d | 302 | |
5f4da8c0 TS |
303 | return 0; |
304 | } | |
305 | ||
306 | static int vmdk_is_cid_valid(BlockDriverState *bs) | |
307 | { | |
5f4da8c0 | 308 | BDRVVmdkState *s = bs->opaque; |
b171271a | 309 | BlockDriverState *p_bs = bs->backing_hd; |
5f4da8c0 TS |
310 | uint32_t cur_pcid; |
311 | ||
c338b6ad | 312 | if (!s->cid_checked && p_bs) { |
ae261c86 FZ |
313 | cur_pcid = vmdk_read_cid(p_bs, 0); |
314 | if (s->parent_cid != cur_pcid) { | |
315 | /* CID not valid */ | |
5f4da8c0 | 316 | return 0; |
ae261c86 | 317 | } |
5f4da8c0 | 318 | } |
c338b6ad | 319 | s->cid_checked = true; |
ae261c86 | 320 | /* CID valid */ |
5f4da8c0 TS |
321 | return 1; |
322 | } | |
323 | ||
3897575f JC |
324 | /* Queue extents, if any, for reopen() */ |
325 | static int vmdk_reopen_prepare(BDRVReopenState *state, | |
326 | BlockReopenQueue *queue, Error **errp) | |
327 | { | |
328 | BDRVVmdkState *s; | |
329 | int ret = -1; | |
330 | int i; | |
331 | VmdkExtent *e; | |
332 | ||
333 | assert(state != NULL); | |
334 | assert(state->bs != NULL); | |
335 | ||
336 | if (queue == NULL) { | |
4823970b | 337 | error_setg(errp, "No reopen queue for VMDK extents"); |
3897575f JC |
338 | goto exit; |
339 | } | |
340 | ||
341 | s = state->bs->opaque; | |
342 | ||
343 | assert(s != NULL); | |
344 | ||
345 | for (i = 0; i < s->num_extents; i++) { | |
346 | e = &s->extents[i]; | |
347 | if (e->file != state->bs->file) { | |
348 | bdrv_reopen_queue(queue, e->file, state->flags); | |
349 | } | |
350 | } | |
351 | ret = 0; | |
352 | ||
353 | exit: | |
354 | return ret; | |
355 | } | |
356 | ||
9949f97e | 357 | static int vmdk_parent_open(BlockDriverState *bs) |
5f4da8c0 | 358 | { |
5fafdf24 | 359 | char *p_name; |
7fa60fa3 | 360 | char desc[DESC_SIZE + 1]; |
e1da9b24 | 361 | BDRVVmdkState *s = bs->opaque; |
588b65a3 | 362 | int ret; |
5f4da8c0 | 363 | |
7fa60fa3 | 364 | desc[DESC_SIZE] = '\0'; |
588b65a3 PB |
365 | ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE); |
366 | if (ret < 0) { | |
367 | return ret; | |
e1da9b24 | 368 | } |
5f4da8c0 | 369 | |
ae261c86 FZ |
370 | p_name = strstr(desc, "parentFileNameHint"); |
371 | if (p_name != NULL) { | |
5f4da8c0 | 372 | char *end_name; |
5f4da8c0 TS |
373 | |
374 | p_name += sizeof("parentFileNameHint") + 1; | |
ae261c86 FZ |
375 | end_name = strchr(p_name, '\"'); |
376 | if (end_name == NULL) { | |
588b65a3 | 377 | return -EINVAL; |
ae261c86 FZ |
378 | } |
379 | if ((end_name - p_name) > sizeof(bs->backing_file) - 1) { | |
588b65a3 | 380 | return -EINVAL; |
ae261c86 | 381 | } |
3b46e624 | 382 | |
b171271a | 383 | pstrcpy(bs->backing_file, end_name - p_name + 1, p_name); |
ff1afc72 | 384 | } |
5f4da8c0 TS |
385 | |
386 | return 0; | |
387 | } | |
388 | ||
b3976d3c FZ |
389 | /* Create and append extent to the extent array. Return the added VmdkExtent |
390 | * address. return NULL if allocation failed. */ | |
8aa1331c | 391 | static int vmdk_add_extent(BlockDriverState *bs, |
b3976d3c FZ |
392 | BlockDriverState *file, bool flat, int64_t sectors, |
393 | int64_t l1_offset, int64_t l1_backup_offset, | |
394 | uint32_t l1_size, | |
8aa1331c | 395 | int l2_size, uint64_t cluster_sectors, |
4823970b FZ |
396 | VmdkExtent **new_extent, |
397 | Error **errp) | |
b3976d3c FZ |
398 | { |
399 | VmdkExtent *extent; | |
400 | BDRVVmdkState *s = bs->opaque; | |
0a156f7c | 401 | int64_t nb_sectors; |
b3976d3c | 402 | |
8aa1331c FZ |
403 | if (cluster_sectors > 0x200000) { |
404 | /* 0x200000 * 512Bytes = 1GB for one cluster is unrealistic */ | |
4823970b FZ |
405 | error_setg(errp, "Invalid granularity, image may be corrupt"); |
406 | return -EFBIG; | |
8aa1331c | 407 | } |
b0651b8c FZ |
408 | if (l1_size > 512 * 1024 * 1024) { |
409 | /* Although with big capacity and small l1_entry_sectors, we can get a | |
410 | * big l1_size, we don't want unbounded value to allocate the table. | |
411 | * Limit it to 512M, which is 16PB for default cluster and L2 table | |
412 | * size */ | |
4823970b | 413 | error_setg(errp, "L1 size too big"); |
b0651b8c FZ |
414 | return -EFBIG; |
415 | } | |
8aa1331c | 416 | |
0a156f7c MA |
417 | nb_sectors = bdrv_nb_sectors(file); |
418 | if (nb_sectors < 0) { | |
419 | return nb_sectors; | |
c6ac36e1 FZ |
420 | } |
421 | ||
5839e53b | 422 | s->extents = g_renew(VmdkExtent, s->extents, s->num_extents + 1); |
b3976d3c FZ |
423 | extent = &s->extents[s->num_extents]; |
424 | s->num_extents++; | |
425 | ||
426 | memset(extent, 0, sizeof(VmdkExtent)); | |
427 | extent->file = file; | |
428 | extent->flat = flat; | |
429 | extent->sectors = sectors; | |
430 | extent->l1_table_offset = l1_offset; | |
431 | extent->l1_backup_table_offset = l1_backup_offset; | |
432 | extent->l1_size = l1_size; | |
433 | extent->l1_entry_sectors = l2_size * cluster_sectors; | |
434 | extent->l2_size = l2_size; | |
301c7d38 | 435 | extent->cluster_sectors = flat ? sectors : cluster_sectors; |
0a156f7c | 436 | extent->next_cluster_sector = ROUND_UP(nb_sectors, cluster_sectors); |
b3976d3c FZ |
437 | |
438 | if (s->num_extents > 1) { | |
439 | extent->end_sector = (*(extent - 1)).end_sector + extent->sectors; | |
440 | } else { | |
441 | extent->end_sector = extent->sectors; | |
442 | } | |
443 | bs->total_sectors = extent->end_sector; | |
8aa1331c FZ |
444 | if (new_extent) { |
445 | *new_extent = extent; | |
446 | } | |
447 | return 0; | |
b3976d3c FZ |
448 | } |
449 | ||
4823970b FZ |
450 | static int vmdk_init_tables(BlockDriverState *bs, VmdkExtent *extent, |
451 | Error **errp) | |
5f4da8c0 | 452 | { |
b4b3ab14 | 453 | int ret; |
13c4941c FZ |
454 | size_t l1_size; |
455 | int i; | |
5f4da8c0 | 456 | |
ea2384d3 | 457 | /* read the L1 table */ |
b3976d3c | 458 | l1_size = extent->l1_size * sizeof(uint32_t); |
d6e59931 KW |
459 | extent->l1_table = g_try_malloc(l1_size); |
460 | if (l1_size && extent->l1_table == NULL) { | |
461 | return -ENOMEM; | |
462 | } | |
463 | ||
b4b3ab14 | 464 | ret = bdrv_pread(extent->file, |
4823970b FZ |
465 | extent->l1_table_offset, |
466 | extent->l1_table, | |
467 | l1_size); | |
b4b3ab14 | 468 | if (ret < 0) { |
4823970b FZ |
469 | error_setg_errno(errp, -ret, |
470 | "Could not read l1 table from extent '%s'", | |
471 | extent->file->filename); | |
b4b3ab14 | 472 | goto fail_l1; |
b3976d3c FZ |
473 | } |
474 | for (i = 0; i < extent->l1_size; i++) { | |
475 | le32_to_cpus(&extent->l1_table[i]); | |
ea2384d3 FB |
476 | } |
477 | ||
b3976d3c | 478 | if (extent->l1_backup_table_offset) { |
d6e59931 KW |
479 | extent->l1_backup_table = g_try_malloc(l1_size); |
480 | if (l1_size && extent->l1_backup_table == NULL) { | |
481 | ret = -ENOMEM; | |
482 | goto fail_l1; | |
483 | } | |
b4b3ab14 | 484 | ret = bdrv_pread(extent->file, |
4823970b FZ |
485 | extent->l1_backup_table_offset, |
486 | extent->l1_backup_table, | |
487 | l1_size); | |
b4b3ab14 | 488 | if (ret < 0) { |
4823970b FZ |
489 | error_setg_errno(errp, -ret, |
490 | "Could not read l1 backup table from extent '%s'", | |
491 | extent->file->filename); | |
b4b3ab14 | 492 | goto fail_l1b; |
b3976d3c FZ |
493 | } |
494 | for (i = 0; i < extent->l1_size; i++) { | |
495 | le32_to_cpus(&extent->l1_backup_table[i]); | |
ff1afc72 FB |
496 | } |
497 | } | |
498 | ||
b3976d3c | 499 | extent->l2_cache = |
5839e53b | 500 | g_new(uint32_t, extent->l2_size * L2_CACHE_SIZE); |
ea2384d3 | 501 | return 0; |
b4b3ab14 | 502 | fail_l1b: |
7267c094 | 503 | g_free(extent->l1_backup_table); |
b4b3ab14 | 504 | fail_l1: |
7267c094 | 505 | g_free(extent->l1_table); |
b4b3ab14 FZ |
506 | return ret; |
507 | } | |
508 | ||
daac8fdc FZ |
509 | static int vmdk_open_vmfs_sparse(BlockDriverState *bs, |
510 | BlockDriverState *file, | |
4823970b | 511 | int flags, Error **errp) |
b4b3ab14 FZ |
512 | { |
513 | int ret; | |
514 | uint32_t magic; | |
515 | VMDK3Header header; | |
516 | VmdkExtent *extent; | |
517 | ||
86c6b429 | 518 | ret = bdrv_pread(file, sizeof(magic), &header, sizeof(header)); |
b4b3ab14 | 519 | if (ret < 0) { |
4823970b FZ |
520 | error_setg_errno(errp, -ret, |
521 | "Could not read header from file '%s'", | |
522 | file->filename); | |
86c6b429 | 523 | return ret; |
b4b3ab14 | 524 | } |
f6b61e54 FZ |
525 | ret = vmdk_add_extent(bs, file, false, |
526 | le32_to_cpu(header.disk_sectors), | |
7237aecd | 527 | (int64_t)le32_to_cpu(header.l1dir_offset) << 9, |
f6b61e54 FZ |
528 | 0, |
529 | le32_to_cpu(header.l1dir_size), | |
530 | 4096, | |
531 | le32_to_cpu(header.granularity), | |
4823970b FZ |
532 | &extent, |
533 | errp); | |
8aa1331c FZ |
534 | if (ret < 0) { |
535 | return ret; | |
536 | } | |
4823970b | 537 | ret = vmdk_init_tables(bs, extent, errp); |
b4b3ab14 | 538 | if (ret) { |
86c6b429 FZ |
539 | /* free extent allocated by vmdk_add_extent */ |
540 | vmdk_free_last_extent(bs); | |
b4b3ab14 | 541 | } |
b4b3ab14 FZ |
542 | return ret; |
543 | } | |
544 | ||
d1833ef5 | 545 | static int vmdk_open_desc_file(BlockDriverState *bs, int flags, char *buf, |
a6468367 | 546 | QDict *options, Error **errp); |
f16f509d | 547 | |
a8842e6d PB |
548 | static char *vmdk_read_desc(BlockDriverState *file, uint64_t desc_offset, |
549 | Error **errp) | |
550 | { | |
551 | int64_t size; | |
552 | char *buf; | |
553 | int ret; | |
554 | ||
555 | size = bdrv_getlength(file); | |
556 | if (size < 0) { | |
557 | error_setg_errno(errp, -size, "Could not access file"); | |
558 | return NULL; | |
559 | } | |
560 | ||
03c3359d FZ |
561 | if (size < 4) { |
562 | /* Both descriptor file and sparse image must be much larger than 4 | |
563 | * bytes, also callers of vmdk_read_desc want to compare the first 4 | |
564 | * bytes with VMDK4_MAGIC, let's error out if less is read. */ | |
565 | error_setg(errp, "File is too small, not a valid image"); | |
566 | return NULL; | |
567 | } | |
568 | ||
73b7bcad FZ |
569 | size = MIN(size, (1 << 20) - 1); /* avoid unbounded allocation */ |
570 | buf = g_malloc(size + 1); | |
a8842e6d PB |
571 | |
572 | ret = bdrv_pread(file, desc_offset, buf, size); | |
573 | if (ret < 0) { | |
574 | error_setg_errno(errp, -ret, "Could not read from file"); | |
575 | g_free(buf); | |
576 | return NULL; | |
577 | } | |
73b7bcad | 578 | buf[ret] = 0; |
a8842e6d PB |
579 | |
580 | return buf; | |
581 | } | |
582 | ||
86c6b429 FZ |
583 | static int vmdk_open_vmdk4(BlockDriverState *bs, |
584 | BlockDriverState *file, | |
a6468367 | 585 | int flags, QDict *options, Error **errp) |
b4b3ab14 FZ |
586 | { |
587 | int ret; | |
588 | uint32_t magic; | |
589 | uint32_t l1_size, l1_entry_sectors; | |
590 | VMDK4Header header; | |
b4b3ab14 | 591 | VmdkExtent *extent; |
f4c129a3 | 592 | BDRVVmdkState *s = bs->opaque; |
bb45ded9 | 593 | int64_t l1_backup_offset = 0; |
b4b3ab14 | 594 | |
86c6b429 | 595 | ret = bdrv_pread(file, sizeof(magic), &header, sizeof(header)); |
b4b3ab14 | 596 | if (ret < 0) { |
4823970b FZ |
597 | error_setg_errno(errp, -ret, |
598 | "Could not read header from file '%s'", | |
599 | file->filename); | |
89ac8480 | 600 | return -EINVAL; |
b4b3ab14 | 601 | } |
5a394b9e | 602 | if (header.capacity == 0) { |
e98768d4 | 603 | uint64_t desc_offset = le64_to_cpu(header.desc_offset); |
5a394b9e | 604 | if (desc_offset) { |
d1833ef5 PB |
605 | char *buf = vmdk_read_desc(file, desc_offset << 9, errp); |
606 | if (!buf) { | |
607 | return -EINVAL; | |
608 | } | |
a6468367 | 609 | ret = vmdk_open_desc_file(bs, flags, buf, options, errp); |
d1833ef5 PB |
610 | g_free(buf); |
611 | return ret; | |
5a394b9e | 612 | } |
f16f509d | 613 | } |
65bd155c | 614 | |
f4c129a3 FZ |
615 | if (!s->create_type) { |
616 | s->create_type = g_strdup("monolithicSparse"); | |
617 | } | |
618 | ||
65bd155c KW |
619 | if (le64_to_cpu(header.gd_offset) == VMDK4_GD_AT_END) { |
620 | /* | |
621 | * The footer takes precedence over the header, so read it in. The | |
622 | * footer starts at offset -1024 from the end: One sector for the | |
623 | * footer, and another one for the end-of-stream marker. | |
624 | */ | |
625 | struct { | |
626 | struct { | |
627 | uint64_t val; | |
628 | uint32_t size; | |
629 | uint32_t type; | |
630 | uint8_t pad[512 - 16]; | |
631 | } QEMU_PACKED footer_marker; | |
632 | ||
633 | uint32_t magic; | |
634 | VMDK4Header header; | |
635 | uint8_t pad[512 - 4 - sizeof(VMDK4Header)]; | |
636 | ||
637 | struct { | |
638 | uint64_t val; | |
639 | uint32_t size; | |
640 | uint32_t type; | |
641 | uint8_t pad[512 - 16]; | |
642 | } QEMU_PACKED eos_marker; | |
643 | } QEMU_PACKED footer; | |
644 | ||
645 | ret = bdrv_pread(file, | |
646 | bs->file->total_sectors * 512 - 1536, | |
647 | &footer, sizeof(footer)); | |
648 | if (ret < 0) { | |
d899d2e2 | 649 | error_setg_errno(errp, -ret, "Failed to read footer"); |
65bd155c KW |
650 | return ret; |
651 | } | |
652 | ||
653 | /* Some sanity checks for the footer */ | |
654 | if (be32_to_cpu(footer.magic) != VMDK4_MAGIC || | |
655 | le32_to_cpu(footer.footer_marker.size) != 0 || | |
656 | le32_to_cpu(footer.footer_marker.type) != MARKER_FOOTER || | |
657 | le64_to_cpu(footer.eos_marker.val) != 0 || | |
658 | le32_to_cpu(footer.eos_marker.size) != 0 || | |
659 | le32_to_cpu(footer.eos_marker.type) != MARKER_END_OF_STREAM) | |
660 | { | |
d899d2e2 | 661 | error_setg(errp, "Invalid footer"); |
65bd155c KW |
662 | return -EINVAL; |
663 | } | |
664 | ||
665 | header = footer.header; | |
666 | } | |
667 | ||
509d39aa | 668 | if (le32_to_cpu(header.version) > 3) { |
96c51eb5 | 669 | char buf[64]; |
4ab9dab5 | 670 | snprintf(buf, sizeof(buf), "VMDK version %" PRId32, |
96c51eb5 | 671 | le32_to_cpu(header.version)); |
89ac8480 | 672 | error_set(errp, QERR_UNKNOWN_BLOCK_FORMAT_FEATURE, |
81e5f78a | 673 | bdrv_get_device_or_node_name(bs), "vmdk", buf); |
96c51eb5 | 674 | return -ENOTSUP; |
509d39aa FZ |
675 | } else if (le32_to_cpu(header.version) == 3 && (flags & BDRV_O_RDWR)) { |
676 | /* VMware KB 2064959 explains that version 3 added support for | |
677 | * persistent changed block tracking (CBT), and backup software can | |
678 | * read it as version=1 if it doesn't care about the changed area | |
679 | * information. So we are safe to enable read only. */ | |
680 | error_setg(errp, "VMDK version 3 must be read only"); | |
681 | return -EINVAL; | |
96c51eb5 FZ |
682 | } |
683 | ||
ca8804ce | 684 | if (le32_to_cpu(header.num_gtes_per_gt) > 512) { |
89ac8480 | 685 | error_setg(errp, "L2 table size too big"); |
f8ce0403 FZ |
686 | return -EINVAL; |
687 | } | |
688 | ||
ca8804ce | 689 | l1_entry_sectors = le32_to_cpu(header.num_gtes_per_gt) |
b4b3ab14 | 690 | * le64_to_cpu(header.granularity); |
75d12341 | 691 | if (l1_entry_sectors == 0) { |
d899d2e2 | 692 | error_setg(errp, "L1 entry size is invalid"); |
86c6b429 FZ |
693 | return -EINVAL; |
694 | } | |
b4b3ab14 FZ |
695 | l1_size = (le64_to_cpu(header.capacity) + l1_entry_sectors - 1) |
696 | / l1_entry_sectors; | |
bb45ded9 FZ |
697 | if (le32_to_cpu(header.flags) & VMDK4_FLAG_RGD) { |
698 | l1_backup_offset = le64_to_cpu(header.rgd_offset) << 9; | |
699 | } | |
57322b78 | 700 | if (bdrv_nb_sectors(file) < le64_to_cpu(header.grain_offset)) { |
4ab9dab5 FZ |
701 | error_setg(errp, "File truncated, expecting at least %" PRId64 " bytes", |
702 | (int64_t)(le64_to_cpu(header.grain_offset) | |
703 | * BDRV_SECTOR_SIZE)); | |
34ceed81 FZ |
704 | return -EINVAL; |
705 | } | |
706 | ||
8aa1331c | 707 | ret = vmdk_add_extent(bs, file, false, |
b4b3ab14 FZ |
708 | le64_to_cpu(header.capacity), |
709 | le64_to_cpu(header.gd_offset) << 9, | |
bb45ded9 | 710 | l1_backup_offset, |
b4b3ab14 | 711 | l1_size, |
ca8804ce | 712 | le32_to_cpu(header.num_gtes_per_gt), |
8aa1331c | 713 | le64_to_cpu(header.granularity), |
4823970b FZ |
714 | &extent, |
715 | errp); | |
8aa1331c FZ |
716 | if (ret < 0) { |
717 | return ret; | |
718 | } | |
432bb170 FZ |
719 | extent->compressed = |
720 | le16_to_cpu(header.compressAlgorithm) == VMDK4_COMPRESSION_DEFLATE; | |
d8a7b061 FZ |
721 | if (extent->compressed) { |
722 | g_free(s->create_type); | |
723 | s->create_type = g_strdup("streamOptimized"); | |
724 | } | |
432bb170 | 725 | extent->has_marker = le32_to_cpu(header.flags) & VMDK4_FLAG_MARKER; |
14ead646 FZ |
726 | extent->version = le32_to_cpu(header.version); |
727 | extent->has_zero_grain = le32_to_cpu(header.flags) & VMDK4_FLAG_ZERO_GRAIN; | |
4823970b | 728 | ret = vmdk_init_tables(bs, extent, errp); |
b4b3ab14 | 729 | if (ret) { |
86c6b429 FZ |
730 | /* free extent allocated by vmdk_add_extent */ |
731 | vmdk_free_last_extent(bs); | |
b4b3ab14 | 732 | } |
b4b3ab14 FZ |
733 | return ret; |
734 | } | |
735 | ||
7fa60fa3 FZ |
736 | /* find an option value out of descriptor file */ |
737 | static int vmdk_parse_description(const char *desc, const char *opt_name, | |
738 | char *buf, int buf_size) | |
739 | { | |
740 | char *opt_pos, *opt_end; | |
741 | const char *end = desc + strlen(desc); | |
742 | ||
743 | opt_pos = strstr(desc, opt_name); | |
744 | if (!opt_pos) { | |
65f74725 | 745 | return VMDK_ERROR; |
7fa60fa3 FZ |
746 | } |
747 | /* Skip "=\"" following opt_name */ | |
748 | opt_pos += strlen(opt_name) + 2; | |
749 | if (opt_pos >= end) { | |
65f74725 | 750 | return VMDK_ERROR; |
7fa60fa3 FZ |
751 | } |
752 | opt_end = opt_pos; | |
753 | while (opt_end < end && *opt_end != '"') { | |
754 | opt_end++; | |
755 | } | |
756 | if (opt_end == end || buf_size < opt_end - opt_pos + 1) { | |
65f74725 | 757 | return VMDK_ERROR; |
7fa60fa3 FZ |
758 | } |
759 | pstrcpy(buf, opt_end - opt_pos + 1, opt_pos); | |
65f74725 | 760 | return VMDK_OK; |
7fa60fa3 FZ |
761 | } |
762 | ||
86c6b429 FZ |
763 | /* Open an extent file and append to bs array */ |
764 | static int vmdk_open_sparse(BlockDriverState *bs, | |
d1833ef5 | 765 | BlockDriverState *file, int flags, |
a6468367 | 766 | char *buf, QDict *options, Error **errp) |
86c6b429 FZ |
767 | { |
768 | uint32_t magic; | |
769 | ||
d1833ef5 | 770 | magic = ldl_be_p(buf); |
86c6b429 FZ |
771 | switch (magic) { |
772 | case VMDK3_MAGIC: | |
4823970b | 773 | return vmdk_open_vmfs_sparse(bs, file, flags, errp); |
86c6b429 FZ |
774 | break; |
775 | case VMDK4_MAGIC: | |
a6468367 | 776 | return vmdk_open_vmdk4(bs, file, flags, options, errp); |
86c6b429 FZ |
777 | break; |
778 | default: | |
76abe407 PB |
779 | error_setg(errp, "Image not in VMDK format"); |
780 | return -EINVAL; | |
86c6b429 FZ |
781 | break; |
782 | } | |
783 | } | |
784 | ||
7fa60fa3 | 785 | static int vmdk_parse_extents(const char *desc, BlockDriverState *bs, |
a6468367 KW |
786 | const char *desc_file_path, QDict *options, |
787 | Error **errp) | |
7fa60fa3 FZ |
788 | { |
789 | int ret; | |
395a22fa | 790 | int matches; |
7fa60fa3 FZ |
791 | char access[11]; |
792 | char type[11]; | |
793 | char fname[512]; | |
794 | const char *p = desc; | |
795 | int64_t sectors = 0; | |
796 | int64_t flat_offset; | |
fe206562 | 797 | char *extent_path; |
86c6b429 | 798 | BlockDriverState *extent_file; |
f4c129a3 FZ |
799 | BDRVVmdkState *s = bs->opaque; |
800 | VmdkExtent *extent; | |
a6468367 | 801 | char extent_opt_prefix[32]; |
7fa60fa3 FZ |
802 | |
803 | while (*p) { | |
8a3e0bc3 FZ |
804 | /* parse extent line in one of below formats: |
805 | * | |
7fa60fa3 | 806 | * RW [size in sectors] FLAT "file-name.vmdk" OFFSET |
7fa60fa3 | 807 | * RW [size in sectors] SPARSE "file-name.vmdk" |
8a3e0bc3 FZ |
808 | * RW [size in sectors] VMFS "file-name.vmdk" |
809 | * RW [size in sectors] VMFSSPARSE "file-name.vmdk" | |
7fa60fa3 FZ |
810 | */ |
811 | flat_offset = -1; | |
395a22fa JC |
812 | matches = sscanf(p, "%10s %" SCNd64 " %10s \"%511[^\n\r\"]\" %" SCNd64, |
813 | access, §ors, type, fname, &flat_offset); | |
814 | if (matches < 4 || strcmp(access, "RW")) { | |
7fa60fa3 FZ |
815 | goto next_line; |
816 | } else if (!strcmp(type, "FLAT")) { | |
395a22fa | 817 | if (matches != 5 || flat_offset < 0) { |
4823970b | 818 | error_setg(errp, "Invalid extent lines: \n%s", p); |
7fa60fa3 FZ |
819 | return -EINVAL; |
820 | } | |
dbbcaa8d | 821 | } else if (!strcmp(type, "VMFS")) { |
395a22fa | 822 | if (matches == 4) { |
b47053bd FZ |
823 | flat_offset = 0; |
824 | } else { | |
825 | error_setg(errp, "Invalid extent lines:\n%s", p); | |
826 | return -EINVAL; | |
827 | } | |
395a22fa | 828 | } else if (matches != 4) { |
b47053bd | 829 | error_setg(errp, "Invalid extent lines:\n%s", p); |
7fa60fa3 FZ |
830 | return -EINVAL; |
831 | } | |
832 | ||
7fa60fa3 | 833 | if (sectors <= 0 || |
daac8fdc | 834 | (strcmp(type, "FLAT") && strcmp(type, "SPARSE") && |
04d542c8 | 835 | strcmp(type, "VMFS") && strcmp(type, "VMFSSPARSE")) || |
7fa60fa3 FZ |
836 | (strcmp(access, "RW"))) { |
837 | goto next_line; | |
838 | } | |
839 | ||
5c98415b HR |
840 | if (!path_is_absolute(fname) && !path_has_protocol(fname) && |
841 | !desc_file_path[0]) | |
842 | { | |
843 | error_setg(errp, "Cannot use relative extent paths with VMDK " | |
844 | "descriptor file '%s'", bs->file->filename); | |
845 | return -EINVAL; | |
846 | } | |
847 | ||
fe206562 | 848 | extent_path = g_malloc0(PATH_MAX); |
a7be17be | 849 | path_combine(extent_path, PATH_MAX, desc_file_path, fname); |
2e40134b | 850 | extent_file = NULL; |
a6468367 KW |
851 | |
852 | ret = snprintf(extent_opt_prefix, 32, "extents.%d", s->num_extents); | |
853 | assert(ret < 32); | |
854 | ||
f3930ed0 KW |
855 | ret = bdrv_open_image(&extent_file, extent_path, options, |
856 | extent_opt_prefix, bs, &child_file, false, errp); | |
fe206562 | 857 | g_free(extent_path); |
86c6b429 FZ |
858 | if (ret) { |
859 | return ret; | |
860 | } | |
861 | ||
7fa60fa3 | 862 | /* save to extents array */ |
04d542c8 | 863 | if (!strcmp(type, "FLAT") || !strcmp(type, "VMFS")) { |
7fa60fa3 | 864 | /* FLAT extent */ |
7fa60fa3 | 865 | |
8aa1331c | 866 | ret = vmdk_add_extent(bs, extent_file, true, sectors, |
4823970b | 867 | 0, 0, 0, 0, 0, &extent, errp); |
8aa1331c | 868 | if (ret < 0) { |
ff74f33c | 869 | bdrv_unref(extent_file); |
8aa1331c FZ |
870 | return ret; |
871 | } | |
f16f509d | 872 | extent->flat_start_offset = flat_offset << 9; |
daac8fdc FZ |
873 | } else if (!strcmp(type, "SPARSE") || !strcmp(type, "VMFSSPARSE")) { |
874 | /* SPARSE extent and VMFSSPARSE extent are both "COWD" sparse file*/ | |
d1833ef5 PB |
875 | char *buf = vmdk_read_desc(extent_file, 0, errp); |
876 | if (!buf) { | |
877 | ret = -EINVAL; | |
878 | } else { | |
a6468367 KW |
879 | ret = vmdk_open_sparse(bs, extent_file, bs->open_flags, buf, |
880 | options, errp); | |
d1833ef5 | 881 | } |
b6b1d31f | 882 | g_free(buf); |
86c6b429 | 883 | if (ret) { |
4f6fd349 | 884 | bdrv_unref(extent_file); |
86c6b429 FZ |
885 | return ret; |
886 | } | |
f4c129a3 | 887 | extent = &s->extents[s->num_extents - 1]; |
7fa60fa3 | 888 | } else { |
4823970b | 889 | error_setg(errp, "Unsupported extent type '%s'", type); |
ff74f33c | 890 | bdrv_unref(extent_file); |
7fa60fa3 FZ |
891 | return -ENOTSUP; |
892 | } | |
f4c129a3 | 893 | extent->type = g_strdup(type); |
7fa60fa3 FZ |
894 | next_line: |
895 | /* move to next line */ | |
899f1ae2 FZ |
896 | while (*p) { |
897 | if (*p == '\n') { | |
898 | p++; | |
899 | break; | |
900 | } | |
7fa60fa3 FZ |
901 | p++; |
902 | } | |
7fa60fa3 FZ |
903 | } |
904 | return 0; | |
905 | } | |
906 | ||
d1833ef5 | 907 | static int vmdk_open_desc_file(BlockDriverState *bs, int flags, char *buf, |
a6468367 | 908 | QDict *options, Error **errp) |
7fa60fa3 FZ |
909 | { |
910 | int ret; | |
7fa60fa3 FZ |
911 | char ct[128]; |
912 | BDRVVmdkState *s = bs->opaque; | |
913 | ||
7fa60fa3 | 914 | if (vmdk_parse_description(buf, "createType", ct, sizeof(ct))) { |
76abe407 PB |
915 | error_setg(errp, "invalid VMDK image descriptor"); |
916 | ret = -EINVAL; | |
0bed087d | 917 | goto exit; |
7fa60fa3 | 918 | } |
6398de51 | 919 | if (strcmp(ct, "monolithicFlat") && |
04d542c8 | 920 | strcmp(ct, "vmfs") && |
daac8fdc | 921 | strcmp(ct, "vmfsSparse") && |
86c6b429 | 922 | strcmp(ct, "twoGbMaxExtentSparse") && |
6398de51 | 923 | strcmp(ct, "twoGbMaxExtentFlat")) { |
4823970b | 924 | error_setg(errp, "Unsupported image type '%s'", ct); |
0bed087d EB |
925 | ret = -ENOTSUP; |
926 | goto exit; | |
7fa60fa3 | 927 | } |
f4c129a3 | 928 | s->create_type = g_strdup(ct); |
7fa60fa3 | 929 | s->desc_offset = 0; |
a6468367 | 930 | ret = vmdk_parse_extents(buf, bs, bs->file->exact_filename, options, errp); |
0bed087d | 931 | exit: |
0bed087d | 932 | return ret; |
7fa60fa3 FZ |
933 | } |
934 | ||
015a1036 HR |
935 | static int vmdk_open(BlockDriverState *bs, QDict *options, int flags, |
936 | Error **errp) | |
b4b3ab14 | 937 | { |
9aeecbbc | 938 | char *buf; |
86c6b429 FZ |
939 | int ret; |
940 | BDRVVmdkState *s = bs->opaque; | |
37f09e5e | 941 | uint32_t magic; |
b4b3ab14 | 942 | |
d1833ef5 PB |
943 | buf = vmdk_read_desc(bs->file, 0, errp); |
944 | if (!buf) { | |
945 | return -EINVAL; | |
946 | } | |
947 | ||
37f09e5e PB |
948 | magic = ldl_be_p(buf); |
949 | switch (magic) { | |
950 | case VMDK3_MAGIC: | |
951 | case VMDK4_MAGIC: | |
a6468367 | 952 | ret = vmdk_open_sparse(bs, bs->file, flags, buf, options, errp); |
37f09e5e PB |
953 | s->desc_offset = 0x200; |
954 | break; | |
955 | default: | |
a6468367 | 956 | ret = vmdk_open_desc_file(bs, flags, buf, options, errp); |
37f09e5e | 957 | break; |
b4b3ab14 | 958 | } |
37f09e5e PB |
959 | if (ret) { |
960 | goto fail; | |
961 | } | |
962 | ||
bae0a0cc PB |
963 | /* try to open parent images, if exist */ |
964 | ret = vmdk_parent_open(bs); | |
965 | if (ret) { | |
966 | goto fail; | |
967 | } | |
f4c129a3 | 968 | s->cid = vmdk_read_cid(bs, 0); |
bae0a0cc | 969 | s->parent_cid = vmdk_read_cid(bs, 1); |
848c66e8 | 970 | qemu_co_mutex_init(&s->lock); |
2bc3166c KW |
971 | |
972 | /* Disable migration when VMDK images are used */ | |
81e5f78a AG |
973 | error_setg(&s->migration_blocker, "The vmdk format used by node '%s' " |
974 | "does not support live migration", | |
975 | bdrv_get_device_or_node_name(bs)); | |
2bc3166c | 976 | migrate_add_blocker(s->migration_blocker); |
d1833ef5 | 977 | g_free(buf); |
2bc3166c | 978 | return 0; |
bae0a0cc PB |
979 | |
980 | fail: | |
d1833ef5 | 981 | g_free(buf); |
f4c129a3 FZ |
982 | g_free(s->create_type); |
983 | s->create_type = NULL; | |
bae0a0cc PB |
984 | vmdk_free_extents(bs); |
985 | return ret; | |
ea2384d3 FB |
986 | } |
987 | ||
d34682cd | 988 | |
3baca891 | 989 | static void vmdk_refresh_limits(BlockDriverState *bs, Error **errp) |
d34682cd KW |
990 | { |
991 | BDRVVmdkState *s = bs->opaque; | |
992 | int i; | |
993 | ||
994 | for (i = 0; i < s->num_extents; i++) { | |
995 | if (!s->extents[i].flat) { | |
996 | bs->bl.write_zeroes_alignment = | |
997 | MAX(bs->bl.write_zeroes_alignment, | |
998 | s->extents[i].cluster_sectors); | |
999 | } | |
1000 | } | |
d34682cd KW |
1001 | } |
1002 | ||
c6ac36e1 FZ |
1003 | /** |
1004 | * get_whole_cluster | |
1005 | * | |
1006 | * Copy backing file's cluster that covers @sector_num, otherwise write zero, | |
1007 | * to the cluster at @cluster_sector_num. | |
1008 | * | |
1009 | * If @skip_start_sector < @skip_end_sector, the relative range | |
1010 | * [@skip_start_sector, @skip_end_sector) is not copied or written, and leave | |
1011 | * it for call to write user data in the request. | |
1012 | */ | |
b3976d3c | 1013 | static int get_whole_cluster(BlockDriverState *bs, |
c6ac36e1 FZ |
1014 | VmdkExtent *extent, |
1015 | uint64_t cluster_sector_num, | |
1016 | uint64_t sector_num, | |
1017 | uint64_t skip_start_sector, | |
1018 | uint64_t skip_end_sector) | |
5f4da8c0 | 1019 | { |
bf81507d | 1020 | int ret = VMDK_OK; |
c6ac36e1 FZ |
1021 | int64_t cluster_bytes; |
1022 | uint8_t *whole_grain; | |
1023 | ||
1024 | /* For COW, align request sector_num to cluster start */ | |
1025 | sector_num = QEMU_ALIGN_DOWN(sector_num, extent->cluster_sectors); | |
1026 | cluster_bytes = extent->cluster_sectors << BDRV_SECTOR_BITS; | |
1027 | whole_grain = qemu_blockalign(bs, cluster_bytes); | |
5f4da8c0 | 1028 | |
c6ac36e1 FZ |
1029 | if (!bs->backing_hd) { |
1030 | memset(whole_grain, 0, skip_start_sector << BDRV_SECTOR_BITS); | |
1031 | memset(whole_grain + (skip_end_sector << BDRV_SECTOR_BITS), 0, | |
1032 | cluster_bytes - (skip_end_sector << BDRV_SECTOR_BITS)); | |
1033 | } | |
1034 | ||
1035 | assert(skip_end_sector <= extent->cluster_sectors); | |
0e69c543 FZ |
1036 | /* we will be here if it's first write on non-exist grain(cluster). |
1037 | * try to read from parent image, if exist */ | |
c6ac36e1 FZ |
1038 | if (bs->backing_hd && !vmdk_is_cid_valid(bs)) { |
1039 | ret = VMDK_ERROR; | |
1040 | goto exit; | |
1041 | } | |
5f4da8c0 | 1042 | |
c6ac36e1 FZ |
1043 | /* Read backing data before skip range */ |
1044 | if (skip_start_sector > 0) { | |
1045 | if (bs->backing_hd) { | |
1046 | ret = bdrv_read(bs->backing_hd, sector_num, | |
1047 | whole_grain, skip_start_sector); | |
1048 | if (ret < 0) { | |
1049 | ret = VMDK_ERROR; | |
1050 | goto exit; | |
1051 | } | |
1052 | } | |
1053 | ret = bdrv_write(extent->file, cluster_sector_num, whole_grain, | |
1054 | skip_start_sector); | |
c336500d | 1055 | if (ret < 0) { |
bf81507d FZ |
1056 | ret = VMDK_ERROR; |
1057 | goto exit; | |
c336500d | 1058 | } |
c6ac36e1 FZ |
1059 | } |
1060 | /* Read backing data after skip range */ | |
1061 | if (skip_end_sector < extent->cluster_sectors) { | |
1062 | if (bs->backing_hd) { | |
1063 | ret = bdrv_read(bs->backing_hd, sector_num + skip_end_sector, | |
1064 | whole_grain + (skip_end_sector << BDRV_SECTOR_BITS), | |
1065 | extent->cluster_sectors - skip_end_sector); | |
1066 | if (ret < 0) { | |
1067 | ret = VMDK_ERROR; | |
1068 | goto exit; | |
1069 | } | |
1070 | } | |
1071 | ret = bdrv_write(extent->file, cluster_sector_num + skip_end_sector, | |
1072 | whole_grain + (skip_end_sector << BDRV_SECTOR_BITS), | |
1073 | extent->cluster_sectors - skip_end_sector); | |
c336500d | 1074 | if (ret < 0) { |
bf81507d FZ |
1075 | ret = VMDK_ERROR; |
1076 | goto exit; | |
630530a6 TS |
1077 | } |
1078 | } | |
c6ac36e1 | 1079 | |
bf81507d FZ |
1080 | exit: |
1081 | qemu_vfree(whole_grain); | |
1082 | return ret; | |
630530a6 TS |
1083 | } |
1084 | ||
c6ac36e1 FZ |
1085 | static int vmdk_L2update(VmdkExtent *extent, VmdkMetaData *m_data, |
1086 | uint32_t offset) | |
630530a6 | 1087 | { |
c6ac36e1 | 1088 | offset = cpu_to_le32(offset); |
630530a6 | 1089 | /* update L2 table */ |
b3976d3c FZ |
1090 | if (bdrv_pwrite_sync( |
1091 | extent->file, | |
1092 | ((int64_t)m_data->l2_offset * 512) | |
c6ac36e1 | 1093 | + (m_data->l2_index * sizeof(offset)), |
e304e8e5 | 1094 | &offset, sizeof(offset)) < 0) { |
65f74725 | 1095 | return VMDK_ERROR; |
b3976d3c | 1096 | } |
630530a6 | 1097 | /* update backup L2 table */ |
b3976d3c FZ |
1098 | if (extent->l1_backup_table_offset != 0) { |
1099 | m_data->l2_offset = extent->l1_backup_table[m_data->l1_index]; | |
1100 | if (bdrv_pwrite_sync( | |
1101 | extent->file, | |
1102 | ((int64_t)m_data->l2_offset * 512) | |
c6ac36e1 | 1103 | + (m_data->l2_index * sizeof(offset)), |
e304e8e5 | 1104 | &offset, sizeof(offset)) < 0) { |
65f74725 | 1105 | return VMDK_ERROR; |
b3976d3c | 1106 | } |
5f4da8c0 | 1107 | } |
cdeaf1f1 FZ |
1108 | if (m_data->l2_cache_entry) { |
1109 | *m_data->l2_cache_entry = offset; | |
1110 | } | |
630530a6 | 1111 | |
65f74725 | 1112 | return VMDK_OK; |
5f4da8c0 TS |
1113 | } |
1114 | ||
c6ac36e1 FZ |
1115 | /** |
1116 | * get_cluster_offset | |
1117 | * | |
1118 | * Look up cluster offset in extent file by sector number, and store in | |
1119 | * @cluster_offset. | |
1120 | * | |
1121 | * For flat extents, the start offset as parsed from the description file is | |
1122 | * returned. | |
1123 | * | |
1124 | * For sparse extents, look up in L1, L2 table. If allocate is true, return an | |
1125 | * offset for a new cluster and update L2 cache. If there is a backing file, | |
1126 | * COW is done before returning; otherwise, zeroes are written to the allocated | |
1127 | * cluster. Both COW and zero writing skips the sector range | |
1128 | * [@skip_start_sector, @skip_end_sector) passed in by caller, because caller | |
1129 | * has new data to write there. | |
1130 | * | |
1131 | * Returns: VMDK_OK if cluster exists and mapped in the image. | |
1132 | * VMDK_UNALLOC if cluster is not mapped and @allocate is false. | |
1133 | * VMDK_ERROR if failed. | |
1134 | */ | |
91b85bd3 | 1135 | static int get_cluster_offset(BlockDriverState *bs, |
c6ac36e1 FZ |
1136 | VmdkExtent *extent, |
1137 | VmdkMetaData *m_data, | |
1138 | uint64_t offset, | |
1139 | bool allocate, | |
1140 | uint64_t *cluster_offset, | |
1141 | uint64_t skip_start_sector, | |
1142 | uint64_t skip_end_sector) | |
ea2384d3 | 1143 | { |
ea2384d3 FB |
1144 | unsigned int l1_index, l2_offset, l2_index; |
1145 | int min_index, i, j; | |
e304e8e5 | 1146 | uint32_t min_count, *l2_table; |
14ead646 | 1147 | bool zeroed = false; |
c6ac36e1 | 1148 | int64_t ret; |
d1319b07 | 1149 | int64_t cluster_sector; |
630530a6 | 1150 | |
ae261c86 | 1151 | if (m_data) { |
630530a6 | 1152 | m_data->valid = 0; |
ae261c86 | 1153 | } |
91b85bd3 | 1154 | if (extent->flat) { |
7fa60fa3 | 1155 | *cluster_offset = extent->flat_start_offset; |
65f74725 | 1156 | return VMDK_OK; |
91b85bd3 | 1157 | } |
630530a6 | 1158 | |
6398de51 | 1159 | offset -= (extent->end_sector - extent->sectors) * SECTOR_SIZE; |
b3976d3c FZ |
1160 | l1_index = (offset >> 9) / extent->l1_entry_sectors; |
1161 | if (l1_index >= extent->l1_size) { | |
65f74725 | 1162 | return VMDK_ERROR; |
b3976d3c FZ |
1163 | } |
1164 | l2_offset = extent->l1_table[l1_index]; | |
1165 | if (!l2_offset) { | |
65f74725 | 1166 | return VMDK_UNALLOC; |
b3976d3c | 1167 | } |
b4b3ab14 | 1168 | for (i = 0; i < L2_CACHE_SIZE; i++) { |
b3976d3c | 1169 | if (l2_offset == extent->l2_cache_offsets[i]) { |
ea2384d3 | 1170 | /* increment the hit count */ |
b3976d3c | 1171 | if (++extent->l2_cache_counts[i] == 0xffffffff) { |
b4b3ab14 | 1172 | for (j = 0; j < L2_CACHE_SIZE; j++) { |
b3976d3c | 1173 | extent->l2_cache_counts[j] >>= 1; |
ea2384d3 FB |
1174 | } |
1175 | } | |
b3976d3c | 1176 | l2_table = extent->l2_cache + (i * extent->l2_size); |
ea2384d3 FB |
1177 | goto found; |
1178 | } | |
1179 | } | |
1180 | /* not found: load a new entry in the least used one */ | |
1181 | min_index = 0; | |
1182 | min_count = 0xffffffff; | |
b4b3ab14 | 1183 | for (i = 0; i < L2_CACHE_SIZE; i++) { |
b3976d3c FZ |
1184 | if (extent->l2_cache_counts[i] < min_count) { |
1185 | min_count = extent->l2_cache_counts[i]; | |
ea2384d3 FB |
1186 | min_index = i; |
1187 | } | |
1188 | } | |
b3976d3c FZ |
1189 | l2_table = extent->l2_cache + (min_index * extent->l2_size); |
1190 | if (bdrv_pread( | |
1191 | extent->file, | |
1192 | (int64_t)l2_offset * 512, | |
1193 | l2_table, | |
1194 | extent->l2_size * sizeof(uint32_t) | |
1195 | ) != extent->l2_size * sizeof(uint32_t)) { | |
65f74725 | 1196 | return VMDK_ERROR; |
b3976d3c | 1197 | } |
5f4da8c0 | 1198 | |
b3976d3c FZ |
1199 | extent->l2_cache_offsets[min_index] = l2_offset; |
1200 | extent->l2_cache_counts[min_index] = 1; | |
ea2384d3 | 1201 | found: |
b3976d3c | 1202 | l2_index = ((offset >> 9) / extent->cluster_sectors) % extent->l2_size; |
c6ac36e1 | 1203 | cluster_sector = le32_to_cpu(l2_table[l2_index]); |
630530a6 | 1204 | |
cdeaf1f1 FZ |
1205 | if (m_data) { |
1206 | m_data->valid = 1; | |
1207 | m_data->l1_index = l1_index; | |
1208 | m_data->l2_index = l2_index; | |
cdeaf1f1 FZ |
1209 | m_data->l2_offset = l2_offset; |
1210 | m_data->l2_cache_entry = &l2_table[l2_index]; | |
1211 | } | |
c6ac36e1 | 1212 | if (extent->has_zero_grain && cluster_sector == VMDK_GTE_ZEROED) { |
14ead646 FZ |
1213 | zeroed = true; |
1214 | } | |
1215 | ||
c6ac36e1 | 1216 | if (!cluster_sector || zeroed) { |
91b85bd3 | 1217 | if (!allocate) { |
14ead646 | 1218 | return zeroed ? VMDK_ZEROED : VMDK_UNALLOC; |
91b85bd3 | 1219 | } |
9949f97e | 1220 | |
c6ac36e1 FZ |
1221 | cluster_sector = extent->next_cluster_sector; |
1222 | extent->next_cluster_sector += extent->cluster_sectors; | |
630530a6 | 1223 | |
630530a6 TS |
1224 | /* First of all we write grain itself, to avoid race condition |
1225 | * that may to corrupt the image. | |
1226 | * This problem may occur because of insufficient space on host disk | |
1227 | * or inappropriate VM shutdown. | |
1228 | */ | |
c6ac36e1 FZ |
1229 | ret = get_whole_cluster(bs, extent, |
1230 | cluster_sector, | |
1231 | offset >> BDRV_SECTOR_BITS, | |
1232 | skip_start_sector, skip_end_sector); | |
1233 | if (ret) { | |
1234 | return ret; | |
630530a6 | 1235 | } |
ff1afc72 | 1236 | } |
c6ac36e1 | 1237 | *cluster_offset = cluster_sector << BDRV_SECTOR_BITS; |
65f74725 | 1238 | return VMDK_OK; |
ea2384d3 FB |
1239 | } |
1240 | ||
b3976d3c FZ |
1241 | static VmdkExtent *find_extent(BDRVVmdkState *s, |
1242 | int64_t sector_num, VmdkExtent *start_hint) | |
1243 | { | |
1244 | VmdkExtent *extent = start_hint; | |
1245 | ||
1246 | if (!extent) { | |
1247 | extent = &s->extents[0]; | |
1248 | } | |
1249 | while (extent < &s->extents[s->num_extents]) { | |
1250 | if (sector_num < extent->end_sector) { | |
1251 | return extent; | |
1252 | } | |
1253 | extent++; | |
1254 | } | |
1255 | return NULL; | |
1256 | } | |
1257 | ||
61f0ed1d FZ |
1258 | static inline uint64_t vmdk_find_index_in_cluster(VmdkExtent *extent, |
1259 | int64_t sector_num) | |
1260 | { | |
1261 | uint64_t index_in_cluster, extent_begin_sector, extent_relative_sector_num; | |
1262 | ||
1263 | extent_begin_sector = extent->end_sector - extent->sectors; | |
1264 | extent_relative_sector_num = sector_num - extent_begin_sector; | |
1265 | index_in_cluster = extent_relative_sector_num % extent->cluster_sectors; | |
1266 | return index_in_cluster; | |
1267 | } | |
1268 | ||
b6b8a333 | 1269 | static int64_t coroutine_fn vmdk_co_get_block_status(BlockDriverState *bs, |
f8a2e5e3 | 1270 | int64_t sector_num, int nb_sectors, int *pnum) |
ea2384d3 FB |
1271 | { |
1272 | BDRVVmdkState *s = bs->opaque; | |
b3976d3c FZ |
1273 | int64_t index_in_cluster, n, ret; |
1274 | uint64_t offset; | |
1275 | VmdkExtent *extent; | |
1276 | ||
1277 | extent = find_extent(s, sector_num, NULL); | |
1278 | if (!extent) { | |
1279 | return 0; | |
1280 | } | |
f8a2e5e3 | 1281 | qemu_co_mutex_lock(&s->lock); |
91b85bd3 | 1282 | ret = get_cluster_offset(bs, extent, NULL, |
c6ac36e1 FZ |
1283 | sector_num * 512, false, &offset, |
1284 | 0, 0); | |
f8a2e5e3 | 1285 | qemu_co_mutex_unlock(&s->lock); |
14ead646 | 1286 | |
4bc74be9 PB |
1287 | switch (ret) { |
1288 | case VMDK_ERROR: | |
1289 | ret = -EIO; | |
1290 | break; | |
1291 | case VMDK_UNALLOC: | |
1292 | ret = 0; | |
1293 | break; | |
1294 | case VMDK_ZEROED: | |
1295 | ret = BDRV_BLOCK_ZERO; | |
1296 | break; | |
1297 | case VMDK_OK: | |
1298 | ret = BDRV_BLOCK_DATA; | |
3eba13ec | 1299 | if (extent->file == bs->file && !extent->compressed) { |
4bc74be9 PB |
1300 | ret |= BDRV_BLOCK_OFFSET_VALID | offset; |
1301 | } | |
1302 | ||
1303 | break; | |
1304 | } | |
91b85bd3 | 1305 | |
61f0ed1d | 1306 | index_in_cluster = vmdk_find_index_in_cluster(extent, sector_num); |
91b85bd3 | 1307 | n = extent->cluster_sectors - index_in_cluster; |
ae261c86 | 1308 | if (n > nb_sectors) { |
ea2384d3 | 1309 | n = nb_sectors; |
ae261c86 | 1310 | } |
ea2384d3 | 1311 | *pnum = n; |
b3976d3c | 1312 | return ret; |
ea2384d3 FB |
1313 | } |
1314 | ||
dd3f6ee2 FZ |
1315 | static int vmdk_write_extent(VmdkExtent *extent, int64_t cluster_offset, |
1316 | int64_t offset_in_cluster, const uint8_t *buf, | |
1317 | int nb_sectors, int64_t sector_num) | |
1318 | { | |
1319 | int ret; | |
2b2c8c5d FZ |
1320 | VmdkGrainMarker *data = NULL; |
1321 | uLongf buf_len; | |
dd3f6ee2 FZ |
1322 | const uint8_t *write_buf = buf; |
1323 | int write_len = nb_sectors * 512; | |
5e82a31e FZ |
1324 | int64_t write_offset; |
1325 | int64_t write_end_sector; | |
dd3f6ee2 | 1326 | |
2b2c8c5d FZ |
1327 | if (extent->compressed) { |
1328 | if (!extent->has_marker) { | |
1329 | ret = -EINVAL; | |
1330 | goto out; | |
1331 | } | |
1332 | buf_len = (extent->cluster_sectors << 9) * 2; | |
1333 | data = g_malloc(buf_len + sizeof(VmdkGrainMarker)); | |
1334 | if (compress(data->data, &buf_len, buf, nb_sectors << 9) != Z_OK || | |
1335 | buf_len == 0) { | |
1336 | ret = -EINVAL; | |
1337 | goto out; | |
1338 | } | |
1339 | data->lba = sector_num; | |
1340 | data->size = buf_len; | |
1341 | write_buf = (uint8_t *)data; | |
1342 | write_len = buf_len + sizeof(VmdkGrainMarker); | |
1343 | } | |
5e82a31e FZ |
1344 | write_offset = cluster_offset + offset_in_cluster, |
1345 | ret = bdrv_pwrite(extent->file, write_offset, write_buf, write_len); | |
1346 | ||
1347 | write_end_sector = DIV_ROUND_UP(write_offset + write_len, BDRV_SECTOR_SIZE); | |
1348 | ||
1349 | extent->next_cluster_sector = MAX(extent->next_cluster_sector, | |
1350 | write_end_sector); | |
1351 | ||
dd3f6ee2 FZ |
1352 | if (ret != write_len) { |
1353 | ret = ret < 0 ? ret : -EIO; | |
1354 | goto out; | |
1355 | } | |
1356 | ret = 0; | |
1357 | out: | |
2b2c8c5d | 1358 | g_free(data); |
dd3f6ee2 FZ |
1359 | return ret; |
1360 | } | |
1361 | ||
1362 | static int vmdk_read_extent(VmdkExtent *extent, int64_t cluster_offset, | |
1363 | int64_t offset_in_cluster, uint8_t *buf, | |
1364 | int nb_sectors) | |
1365 | { | |
1366 | int ret; | |
2b2c8c5d FZ |
1367 | int cluster_bytes, buf_bytes; |
1368 | uint8_t *cluster_buf, *compressed_data; | |
1369 | uint8_t *uncomp_buf; | |
1370 | uint32_t data_len; | |
1371 | VmdkGrainMarker *marker; | |
1372 | uLongf buf_len; | |
1373 | ||
dd3f6ee2 | 1374 | |
2b2c8c5d FZ |
1375 | if (!extent->compressed) { |
1376 | ret = bdrv_pread(extent->file, | |
1377 | cluster_offset + offset_in_cluster, | |
1378 | buf, nb_sectors * 512); | |
1379 | if (ret == nb_sectors * 512) { | |
1380 | return 0; | |
1381 | } else { | |
1382 | return -EIO; | |
1383 | } | |
1384 | } | |
1385 | cluster_bytes = extent->cluster_sectors * 512; | |
1386 | /* Read two clusters in case GrainMarker + compressed data > one cluster */ | |
1387 | buf_bytes = cluster_bytes * 2; | |
1388 | cluster_buf = g_malloc(buf_bytes); | |
1389 | uncomp_buf = g_malloc(cluster_bytes); | |
dd3f6ee2 | 1390 | ret = bdrv_pread(extent->file, |
2b2c8c5d FZ |
1391 | cluster_offset, |
1392 | cluster_buf, buf_bytes); | |
1393 | if (ret < 0) { | |
1394 | goto out; | |
1395 | } | |
1396 | compressed_data = cluster_buf; | |
1397 | buf_len = cluster_bytes; | |
1398 | data_len = cluster_bytes; | |
1399 | if (extent->has_marker) { | |
1400 | marker = (VmdkGrainMarker *)cluster_buf; | |
1401 | compressed_data = marker->data; | |
1402 | data_len = le32_to_cpu(marker->size); | |
1403 | } | |
1404 | if (!data_len || data_len > buf_bytes) { | |
1405 | ret = -EINVAL; | |
1406 | goto out; | |
1407 | } | |
1408 | ret = uncompress(uncomp_buf, &buf_len, compressed_data, data_len); | |
1409 | if (ret != Z_OK) { | |
1410 | ret = -EINVAL; | |
1411 | goto out; | |
1412 | ||
1413 | } | |
1414 | if (offset_in_cluster < 0 || | |
1415 | offset_in_cluster + nb_sectors * 512 > buf_len) { | |
1416 | ret = -EINVAL; | |
1417 | goto out; | |
dd3f6ee2 | 1418 | } |
2b2c8c5d FZ |
1419 | memcpy(buf, uncomp_buf + offset_in_cluster, nb_sectors * 512); |
1420 | ret = 0; | |
1421 | ||
1422 | out: | |
1423 | g_free(uncomp_buf); | |
1424 | g_free(cluster_buf); | |
1425 | return ret; | |
dd3f6ee2 FZ |
1426 | } |
1427 | ||
5fafdf24 | 1428 | static int vmdk_read(BlockDriverState *bs, int64_t sector_num, |
ea2384d3 FB |
1429 | uint8_t *buf, int nb_sectors) |
1430 | { | |
1431 | BDRVVmdkState *s = bs->opaque; | |
b3976d3c FZ |
1432 | int ret; |
1433 | uint64_t n, index_in_cluster; | |
1434 | VmdkExtent *extent = NULL; | |
ea2384d3 | 1435 | uint64_t cluster_offset; |
5f4da8c0 | 1436 | |
ea2384d3 | 1437 | while (nb_sectors > 0) { |
b3976d3c FZ |
1438 | extent = find_extent(s, sector_num, extent); |
1439 | if (!extent) { | |
1440 | return -EIO; | |
1441 | } | |
c6ac36e1 FZ |
1442 | ret = get_cluster_offset(bs, extent, NULL, |
1443 | sector_num << 9, false, &cluster_offset, | |
1444 | 0, 0); | |
90df601f | 1445 | index_in_cluster = vmdk_find_index_in_cluster(extent, sector_num); |
b3976d3c | 1446 | n = extent->cluster_sectors - index_in_cluster; |
ae261c86 | 1447 | if (n > nb_sectors) { |
ea2384d3 | 1448 | n = nb_sectors; |
ae261c86 | 1449 | } |
14ead646 | 1450 | if (ret != VMDK_OK) { |
91b85bd3 | 1451 | /* if not allocated, try to read from parent image, if exist */ |
14ead646 | 1452 | if (bs->backing_hd && ret != VMDK_ZEROED) { |
ae261c86 | 1453 | if (!vmdk_is_cid_valid(bs)) { |
7fa60fa3 | 1454 | return -EINVAL; |
ae261c86 | 1455 | } |
b171271a | 1456 | ret = bdrv_read(bs->backing_hd, sector_num, buf, n); |
ae261c86 | 1457 | if (ret < 0) { |
7fa60fa3 | 1458 | return ret; |
ae261c86 | 1459 | } |
5f4da8c0 TS |
1460 | } else { |
1461 | memset(buf, 0, 512 * n); | |
1462 | } | |
ea2384d3 | 1463 | } else { |
dd3f6ee2 FZ |
1464 | ret = vmdk_read_extent(extent, |
1465 | cluster_offset, index_in_cluster * 512, | |
1466 | buf, n); | |
1467 | if (ret) { | |
7fa60fa3 FZ |
1468 | return ret; |
1469 | } | |
ea2384d3 FB |
1470 | } |
1471 | nb_sectors -= n; | |
1472 | sector_num += n; | |
1473 | buf += n * 512; | |
1474 | } | |
1475 | return 0; | |
1476 | } | |
1477 | ||
2914caa0 PB |
1478 | static coroutine_fn int vmdk_co_read(BlockDriverState *bs, int64_t sector_num, |
1479 | uint8_t *buf, int nb_sectors) | |
1480 | { | |
1481 | int ret; | |
1482 | BDRVVmdkState *s = bs->opaque; | |
1483 | qemu_co_mutex_lock(&s->lock); | |
1484 | ret = vmdk_read(bs, sector_num, buf, nb_sectors); | |
1485 | qemu_co_mutex_unlock(&s->lock); | |
1486 | return ret; | |
1487 | } | |
1488 | ||
cdeaf1f1 FZ |
1489 | /** |
1490 | * vmdk_write: | |
1491 | * @zeroed: buf is ignored (data is zero), use zeroed_grain GTE feature | |
8e507243 FZ |
1492 | * if possible, otherwise return -ENOTSUP. |
1493 | * @zero_dry_run: used for zeroed == true only, don't update L2 table, just try | |
1494 | * with each cluster. By dry run we can find if the zero write | |
1495 | * is possible without modifying image data. | |
cdeaf1f1 FZ |
1496 | * |
1497 | * Returns: error code with 0 for success. | |
1498 | */ | |
5fafdf24 | 1499 | static int vmdk_write(BlockDriverState *bs, int64_t sector_num, |
cdeaf1f1 FZ |
1500 | const uint8_t *buf, int nb_sectors, |
1501 | bool zeroed, bool zero_dry_run) | |
ea2384d3 | 1502 | { |
ff1afc72 | 1503 | BDRVVmdkState *s = bs->opaque; |
b3976d3c | 1504 | VmdkExtent *extent = NULL; |
585ea0c8 FZ |
1505 | int ret; |
1506 | int64_t index_in_cluster, n; | |
ff1afc72 | 1507 | uint64_t cluster_offset; |
b3976d3c | 1508 | VmdkMetaData m_data; |
ff1afc72 | 1509 | |
630530a6 | 1510 | if (sector_num > bs->total_sectors) { |
4823970b | 1511 | error_report("Wrong offset: sector_num=0x%" PRIx64 |
92868412 | 1512 | " total_sectors=0x%" PRIx64 "\n", |
630530a6 | 1513 | sector_num, bs->total_sectors); |
7fa60fa3 | 1514 | return -EIO; |
630530a6 TS |
1515 | } |
1516 | ||
ff1afc72 | 1517 | while (nb_sectors > 0) { |
b3976d3c FZ |
1518 | extent = find_extent(s, sector_num, extent); |
1519 | if (!extent) { | |
1520 | return -EIO; | |
1521 | } | |
90df601f | 1522 | index_in_cluster = vmdk_find_index_in_cluster(extent, sector_num); |
c6ac36e1 FZ |
1523 | n = extent->cluster_sectors - index_in_cluster; |
1524 | if (n > nb_sectors) { | |
1525 | n = nb_sectors; | |
1526 | } | |
1527 | ret = get_cluster_offset(bs, extent, &m_data, sector_num << 9, | |
1528 | !(extent->compressed || zeroed), | |
1529 | &cluster_offset, | |
1530 | index_in_cluster, index_in_cluster + n); | |
2b2c8c5d | 1531 | if (extent->compressed) { |
65f74725 | 1532 | if (ret == VMDK_OK) { |
2b2c8c5d | 1533 | /* Refuse write to allocated cluster for streamOptimized */ |
4823970b FZ |
1534 | error_report("Could not write to allocated cluster" |
1535 | " for streamOptimized"); | |
2b2c8c5d FZ |
1536 | return -EIO; |
1537 | } else { | |
1538 | /* allocate */ | |
c6ac36e1 FZ |
1539 | ret = get_cluster_offset(bs, extent, &m_data, sector_num << 9, |
1540 | true, &cluster_offset, 0, 0); | |
2b2c8c5d FZ |
1541 | } |
1542 | } | |
cdeaf1f1 | 1543 | if (ret == VMDK_ERROR) { |
91b85bd3 | 1544 | return -EINVAL; |
b3976d3c | 1545 | } |
cdeaf1f1 FZ |
1546 | if (zeroed) { |
1547 | /* Do zeroed write, buf is ignored */ | |
1548 | if (extent->has_zero_grain && | |
1549 | index_in_cluster == 0 && | |
1550 | n >= extent->cluster_sectors) { | |
1551 | n = extent->cluster_sectors; | |
1552 | if (!zero_dry_run) { | |
cdeaf1f1 | 1553 | /* update L2 tables */ |
c6ac36e1 FZ |
1554 | if (vmdk_L2update(extent, &m_data, VMDK_GTE_ZEROED) |
1555 | != VMDK_OK) { | |
cdeaf1f1 FZ |
1556 | return -EIO; |
1557 | } | |
1558 | } | |
1559 | } else { | |
1560 | return -ENOTSUP; | |
1561 | } | |
1562 | } else { | |
1563 | ret = vmdk_write_extent(extent, | |
1564 | cluster_offset, index_in_cluster * 512, | |
1565 | buf, n, sector_num); | |
1566 | if (ret) { | |
1567 | return ret; | |
1568 | } | |
1569 | if (m_data.valid) { | |
1570 | /* update L2 tables */ | |
c6ac36e1 FZ |
1571 | if (vmdk_L2update(extent, &m_data, |
1572 | cluster_offset >> BDRV_SECTOR_BITS) | |
1573 | != VMDK_OK) { | |
cdeaf1f1 FZ |
1574 | return -EIO; |
1575 | } | |
b3976d3c | 1576 | } |
630530a6 | 1577 | } |
ff1afc72 FB |
1578 | nb_sectors -= n; |
1579 | sector_num += n; | |
1580 | buf += n * 512; | |
5f4da8c0 | 1581 | |
ae261c86 FZ |
1582 | /* update CID on the first write every time the virtual disk is |
1583 | * opened */ | |
69b4d86d | 1584 | if (!s->cid_updated) { |
e5dc64b8 | 1585 | ret = vmdk_write_cid(bs, g_random_int()); |
99f1835d KW |
1586 | if (ret < 0) { |
1587 | return ret; | |
1588 | } | |
69b4d86d | 1589 | s->cid_updated = true; |
5f4da8c0 | 1590 | } |
ff1afc72 FB |
1591 | } |
1592 | return 0; | |
ea2384d3 FB |
1593 | } |
1594 | ||
e183ef75 PB |
1595 | static coroutine_fn int vmdk_co_write(BlockDriverState *bs, int64_t sector_num, |
1596 | const uint8_t *buf, int nb_sectors) | |
1597 | { | |
1598 | int ret; | |
1599 | BDRVVmdkState *s = bs->opaque; | |
1600 | qemu_co_mutex_lock(&s->lock); | |
cdeaf1f1 FZ |
1601 | ret = vmdk_write(bs, sector_num, buf, nb_sectors, false, false); |
1602 | qemu_co_mutex_unlock(&s->lock); | |
1603 | return ret; | |
1604 | } | |
1605 | ||
ba0ad89e FZ |
1606 | static int vmdk_write_compressed(BlockDriverState *bs, |
1607 | int64_t sector_num, | |
1608 | const uint8_t *buf, | |
1609 | int nb_sectors) | |
1610 | { | |
1611 | BDRVVmdkState *s = bs->opaque; | |
1612 | if (s->num_extents == 1 && s->extents[0].compressed) { | |
1613 | return vmdk_write(bs, sector_num, buf, nb_sectors, false, false); | |
1614 | } else { | |
1615 | return -ENOTSUP; | |
1616 | } | |
1617 | } | |
1618 | ||
cdeaf1f1 FZ |
1619 | static int coroutine_fn vmdk_co_write_zeroes(BlockDriverState *bs, |
1620 | int64_t sector_num, | |
aa7bfbff PL |
1621 | int nb_sectors, |
1622 | BdrvRequestFlags flags) | |
cdeaf1f1 FZ |
1623 | { |
1624 | int ret; | |
1625 | BDRVVmdkState *s = bs->opaque; | |
1626 | qemu_co_mutex_lock(&s->lock); | |
8e507243 FZ |
1627 | /* write zeroes could fail if sectors not aligned to cluster, test it with |
1628 | * dry_run == true before really updating image */ | |
cdeaf1f1 FZ |
1629 | ret = vmdk_write(bs, sector_num, NULL, nb_sectors, true, true); |
1630 | if (!ret) { | |
1631 | ret = vmdk_write(bs, sector_num, NULL, nb_sectors, true, false); | |
1632 | } | |
e183ef75 PB |
1633 | qemu_co_mutex_unlock(&s->lock); |
1634 | return ret; | |
1635 | } | |
1636 | ||
6c031aac | 1637 | static int vmdk_create_extent(const char *filename, int64_t filesize, |
917703c1 | 1638 | bool flat, bool compress, bool zeroed_grain, |
4ab15590 | 1639 | QemuOpts *opts, Error **errp) |
8979b227 | 1640 | { |
f66fd6c3 | 1641 | int ret, i; |
917703c1 | 1642 | BlockDriverState *bs = NULL; |
8979b227 | 1643 | VMDK4Header header; |
c13959c7 | 1644 | Error *local_err = NULL; |
917703c1 FZ |
1645 | uint32_t tmp, magic, grains, gd_sectors, gt_size, gt_count; |
1646 | uint32_t *gd_buf = NULL; | |
1647 | int gd_buf_size; | |
0e7e1989 | 1648 | |
4ab15590 | 1649 | ret = bdrv_create_file(filename, opts, &local_err); |
917703c1 FZ |
1650 | if (ret < 0) { |
1651 | error_propagate(errp, local_err); | |
1652 | goto exit; | |
0e7e1989 | 1653 | } |
917703c1 | 1654 | |
2e40134b HR |
1655 | assert(bs == NULL); |
1656 | ret = bdrv_open(&bs, filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_PROTOCOL, | |
1657 | NULL, &local_err); | |
917703c1 FZ |
1658 | if (ret < 0) { |
1659 | error_propagate(errp, local_err); | |
1660 | goto exit; | |
1661 | } | |
1662 | ||
f66fd6c3 | 1663 | if (flat) { |
917703c1 | 1664 | ret = bdrv_truncate(bs, filesize); |
f66fd6c3 | 1665 | if (ret < 0) { |
39a611a3 | 1666 | error_setg_errno(errp, -ret, "Could not truncate file"); |
f66fd6c3 FZ |
1667 | } |
1668 | goto exit; | |
5f4da8c0 | 1669 | } |
8979b227 FB |
1670 | magic = cpu_to_be32(VMDK4_MAGIC); |
1671 | memset(&header, 0, sizeof(header)); | |
69e0b6df | 1672 | header.version = zeroed_grain ? 2 : 1; |
95b0aa42 | 1673 | header.flags = VMDK4_FLAG_RGD | VMDK4_FLAG_NL_DETECT |
69e0b6df FZ |
1674 | | (compress ? VMDK4_FLAG_COMPRESS | VMDK4_FLAG_MARKER : 0) |
1675 | | (zeroed_grain ? VMDK4_FLAG_ZERO_GRAIN : 0); | |
6c031aac | 1676 | header.compressAlgorithm = compress ? VMDK4_COMPRESSION_DEFLATE : 0; |
917703c1 | 1677 | header.capacity = filesize / BDRV_SECTOR_SIZE; |
16372ff0 | 1678 | header.granularity = 128; |
917703c1 | 1679 | header.num_gtes_per_gt = BDRV_SECTOR_SIZE; |
8979b227 | 1680 | |
917703c1 FZ |
1681 | grains = DIV_ROUND_UP(filesize / BDRV_SECTOR_SIZE, header.granularity); |
1682 | gt_size = DIV_ROUND_UP(header.num_gtes_per_gt * sizeof(uint32_t), | |
1683 | BDRV_SECTOR_SIZE); | |
1684 | gt_count = DIV_ROUND_UP(grains, header.num_gtes_per_gt); | |
1685 | gd_sectors = DIV_ROUND_UP(gt_count * sizeof(uint32_t), BDRV_SECTOR_SIZE); | |
8979b227 FB |
1686 | |
1687 | header.desc_offset = 1; | |
1688 | header.desc_size = 20; | |
1689 | header.rgd_offset = header.desc_offset + header.desc_size; | |
917703c1 | 1690 | header.gd_offset = header.rgd_offset + gd_sectors + (gt_size * gt_count); |
8979b227 | 1691 | header.grain_offset = |
917703c1 FZ |
1692 | ROUND_UP(header.gd_offset + gd_sectors + (gt_size * gt_count), |
1693 | header.granularity); | |
16372ff0 AG |
1694 | /* swap endianness for all header fields */ |
1695 | header.version = cpu_to_le32(header.version); | |
1696 | header.flags = cpu_to_le32(header.flags); | |
1697 | header.capacity = cpu_to_le64(header.capacity); | |
1698 | header.granularity = cpu_to_le64(header.granularity); | |
ca8804ce | 1699 | header.num_gtes_per_gt = cpu_to_le32(header.num_gtes_per_gt); |
8979b227 FB |
1700 | header.desc_offset = cpu_to_le64(header.desc_offset); |
1701 | header.desc_size = cpu_to_le64(header.desc_size); | |
1702 | header.rgd_offset = cpu_to_le64(header.rgd_offset); | |
1703 | header.gd_offset = cpu_to_le64(header.gd_offset); | |
1704 | header.grain_offset = cpu_to_le64(header.grain_offset); | |
6c031aac | 1705 | header.compressAlgorithm = cpu_to_le16(header.compressAlgorithm); |
8979b227 FB |
1706 | |
1707 | header.check_bytes[0] = 0xa; | |
1708 | header.check_bytes[1] = 0x20; | |
1709 | header.check_bytes[2] = 0xd; | |
1710 | header.check_bytes[3] = 0xa; | |
3b46e624 TS |
1711 | |
1712 | /* write all the data */ | |
917703c1 FZ |
1713 | ret = bdrv_pwrite(bs, 0, &magic, sizeof(magic)); |
1714 | if (ret < 0) { | |
1715 | error_set(errp, QERR_IO_ERROR); | |
1640366c KS |
1716 | goto exit; |
1717 | } | |
917703c1 FZ |
1718 | ret = bdrv_pwrite(bs, sizeof(magic), &header, sizeof(header)); |
1719 | if (ret < 0) { | |
1720 | error_set(errp, QERR_IO_ERROR); | |
1640366c KS |
1721 | goto exit; |
1722 | } | |
8979b227 | 1723 | |
917703c1 | 1724 | ret = bdrv_truncate(bs, le64_to_cpu(header.grain_offset) << 9); |
1640366c | 1725 | if (ret < 0) { |
39a611a3 | 1726 | error_setg_errno(errp, -ret, "Could not truncate file"); |
1640366c KS |
1727 | goto exit; |
1728 | } | |
8979b227 FB |
1729 | |
1730 | /* write grain directory */ | |
917703c1 FZ |
1731 | gd_buf_size = gd_sectors * BDRV_SECTOR_SIZE; |
1732 | gd_buf = g_malloc0(gd_buf_size); | |
1733 | for (i = 0, tmp = le64_to_cpu(header.rgd_offset) + gd_sectors; | |
1640366c | 1734 | i < gt_count; i++, tmp += gt_size) { |
917703c1 FZ |
1735 | gd_buf[i] = cpu_to_le32(tmp); |
1736 | } | |
1737 | ret = bdrv_pwrite(bs, le64_to_cpu(header.rgd_offset) * BDRV_SECTOR_SIZE, | |
1738 | gd_buf, gd_buf_size); | |
1739 | if (ret < 0) { | |
1740 | error_set(errp, QERR_IO_ERROR); | |
1741 | goto exit; | |
1640366c | 1742 | } |
3b46e624 | 1743 | |
8979b227 | 1744 | /* write backup grain directory */ |
917703c1 | 1745 | for (i = 0, tmp = le64_to_cpu(header.gd_offset) + gd_sectors; |
1640366c | 1746 | i < gt_count; i++, tmp += gt_size) { |
917703c1 FZ |
1747 | gd_buf[i] = cpu_to_le32(tmp); |
1748 | } | |
1749 | ret = bdrv_pwrite(bs, le64_to_cpu(header.gd_offset) * BDRV_SECTOR_SIZE, | |
1750 | gd_buf, gd_buf_size); | |
1751 | if (ret < 0) { | |
1752 | error_set(errp, QERR_IO_ERROR); | |
1753 | goto exit; | |
1640366c | 1754 | } |
8979b227 | 1755 | |
f66fd6c3 | 1756 | ret = 0; |
917703c1 FZ |
1757 | exit: |
1758 | if (bs) { | |
1759 | bdrv_unref(bs); | |
1760 | } | |
1761 | g_free(gd_buf); | |
f66fd6c3 FZ |
1762 | return ret; |
1763 | } | |
1764 | ||
1765 | static int filename_decompose(const char *filename, char *path, char *prefix, | |
4823970b | 1766 | char *postfix, size_t buf_len, Error **errp) |
f66fd6c3 FZ |
1767 | { |
1768 | const char *p, *q; | |
1769 | ||
1770 | if (filename == NULL || !strlen(filename)) { | |
4823970b | 1771 | error_setg(errp, "No filename provided"); |
65f74725 | 1772 | return VMDK_ERROR; |
f66fd6c3 FZ |
1773 | } |
1774 | p = strrchr(filename, '/'); | |
1775 | if (p == NULL) { | |
1776 | p = strrchr(filename, '\\'); | |
1777 | } | |
1778 | if (p == NULL) { | |
1779 | p = strrchr(filename, ':'); | |
1780 | } | |
1781 | if (p != NULL) { | |
1782 | p++; | |
1783 | if (p - filename >= buf_len) { | |
65f74725 | 1784 | return VMDK_ERROR; |
f66fd6c3 FZ |
1785 | } |
1786 | pstrcpy(path, p - filename + 1, filename); | |
1787 | } else { | |
1788 | p = filename; | |
1789 | path[0] = '\0'; | |
1790 | } | |
1791 | q = strrchr(p, '.'); | |
1792 | if (q == NULL) { | |
1793 | pstrcpy(prefix, buf_len, p); | |
1794 | postfix[0] = '\0'; | |
1795 | } else { | |
1796 | if (q - p >= buf_len) { | |
65f74725 | 1797 | return VMDK_ERROR; |
f66fd6c3 FZ |
1798 | } |
1799 | pstrcpy(prefix, q - p + 1, p); | |
1800 | pstrcpy(postfix, buf_len, q); | |
1801 | } | |
65f74725 | 1802 | return VMDK_OK; |
f66fd6c3 FZ |
1803 | } |
1804 | ||
5820f1da | 1805 | static int vmdk_create(const char *filename, QemuOpts *opts, Error **errp) |
f66fd6c3 | 1806 | { |
917703c1 FZ |
1807 | int idx = 0; |
1808 | BlockDriverState *new_bs = NULL; | |
c13959c7 | 1809 | Error *local_err = NULL; |
af057fe7 | 1810 | char *desc = NULL; |
f66fd6c3 | 1811 | int64_t total_size = 0, filesize; |
5820f1da CL |
1812 | char *adapter_type = NULL; |
1813 | char *backing_file = NULL; | |
1814 | char *fmt = NULL; | |
f66fd6c3 FZ |
1815 | int flags = 0; |
1816 | int ret = 0; | |
6c031aac | 1817 | bool flat, split, compress; |
af057fe7 | 1818 | GString *ext_desc_lines; |
fe206562 JC |
1819 | char *path = g_malloc0(PATH_MAX); |
1820 | char *prefix = g_malloc0(PATH_MAX); | |
1821 | char *postfix = g_malloc0(PATH_MAX); | |
1822 | char *desc_line = g_malloc0(BUF_SIZE); | |
1823 | char *ext_filename = g_malloc0(PATH_MAX); | |
1824 | char *desc_filename = g_malloc0(PATH_MAX); | |
f66fd6c3 FZ |
1825 | const int64_t split_size = 0x80000000; /* VMDK has constant split size */ |
1826 | const char *desc_extent_line; | |
fe206562 | 1827 | char *parent_desc_line = g_malloc0(BUF_SIZE); |
f66fd6c3 | 1828 | uint32_t parent_cid = 0xffffffff; |
7f2039f6 | 1829 | uint32_t number_heads = 16; |
69e0b6df | 1830 | bool zeroed_grain = false; |
917703c1 | 1831 | uint32_t desc_offset = 0, desc_len; |
f66fd6c3 FZ |
1832 | const char desc_template[] = |
1833 | "# Disk DescriptorFile\n" | |
1834 | "version=1\n" | |
9b17031a FZ |
1835 | "CID=%" PRIx32 "\n" |
1836 | "parentCID=%" PRIx32 "\n" | |
f66fd6c3 FZ |
1837 | "createType=\"%s\"\n" |
1838 | "%s" | |
1839 | "\n" | |
1840 | "# Extent description\n" | |
1841 | "%s" | |
1842 | "\n" | |
1843 | "# The Disk Data Base\n" | |
1844 | "#DDB\n" | |
1845 | "\n" | |
1846 | "ddb.virtualHWVersion = \"%d\"\n" | |
1847 | "ddb.geometry.cylinders = \"%" PRId64 "\"\n" | |
4ab9dab5 | 1848 | "ddb.geometry.heads = \"%" PRIu32 "\"\n" |
f66fd6c3 | 1849 | "ddb.geometry.sectors = \"63\"\n" |
7f2039f6 | 1850 | "ddb.adapterType = \"%s\"\n"; |
f66fd6c3 | 1851 | |
af057fe7 FZ |
1852 | ext_desc_lines = g_string_new(NULL); |
1853 | ||
4823970b | 1854 | if (filename_decompose(filename, path, prefix, postfix, PATH_MAX, errp)) { |
af057fe7 FZ |
1855 | ret = -EINVAL; |
1856 | goto exit; | |
f66fd6c3 FZ |
1857 | } |
1858 | /* Read out options */ | |
c2eb918e HT |
1859 | total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), |
1860 | BDRV_SECTOR_SIZE); | |
5820f1da CL |
1861 | adapter_type = qemu_opt_get_del(opts, BLOCK_OPT_ADAPTER_TYPE); |
1862 | backing_file = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FILE); | |
1863 | if (qemu_opt_get_bool_del(opts, BLOCK_OPT_COMPAT6, false)) { | |
1864 | flags |= BLOCK_FLAG_COMPAT6; | |
1865 | } | |
1866 | fmt = qemu_opt_get_del(opts, BLOCK_OPT_SUBFMT); | |
1867 | if (qemu_opt_get_bool_del(opts, BLOCK_OPT_ZEROED_GRAIN, false)) { | |
1868 | zeroed_grain = true; | |
f66fd6c3 | 1869 | } |
5820f1da | 1870 | |
7f2039f6 | 1871 | if (!adapter_type) { |
5820f1da | 1872 | adapter_type = g_strdup("ide"); |
7f2039f6 OP |
1873 | } else if (strcmp(adapter_type, "ide") && |
1874 | strcmp(adapter_type, "buslogic") && | |
1875 | strcmp(adapter_type, "lsilogic") && | |
1876 | strcmp(adapter_type, "legacyESX")) { | |
4823970b | 1877 | error_setg(errp, "Unknown adapter type: '%s'", adapter_type); |
af057fe7 FZ |
1878 | ret = -EINVAL; |
1879 | goto exit; | |
7f2039f6 OP |
1880 | } |
1881 | if (strcmp(adapter_type, "ide") != 0) { | |
1882 | /* that's the number of heads with which vmware operates when | |
1883 | creating, exporting, etc. vmdk files with a non-ide adapter type */ | |
1884 | number_heads = 255; | |
1885 | } | |
f66fd6c3 FZ |
1886 | if (!fmt) { |
1887 | /* Default format to monolithicSparse */ | |
5820f1da | 1888 | fmt = g_strdup("monolithicSparse"); |
f66fd6c3 FZ |
1889 | } else if (strcmp(fmt, "monolithicFlat") && |
1890 | strcmp(fmt, "monolithicSparse") && | |
1891 | strcmp(fmt, "twoGbMaxExtentSparse") && | |
6c031aac FZ |
1892 | strcmp(fmt, "twoGbMaxExtentFlat") && |
1893 | strcmp(fmt, "streamOptimized")) { | |
4823970b | 1894 | error_setg(errp, "Unknown subformat: '%s'", fmt); |
af057fe7 FZ |
1895 | ret = -EINVAL; |
1896 | goto exit; | |
f66fd6c3 FZ |
1897 | } |
1898 | split = !(strcmp(fmt, "twoGbMaxExtentFlat") && | |
1899 | strcmp(fmt, "twoGbMaxExtentSparse")); | |
1900 | flat = !(strcmp(fmt, "monolithicFlat") && | |
1901 | strcmp(fmt, "twoGbMaxExtentFlat")); | |
6c031aac | 1902 | compress = !strcmp(fmt, "streamOptimized"); |
f66fd6c3 | 1903 | if (flat) { |
4ab9dab5 | 1904 | desc_extent_line = "RW %" PRId64 " FLAT \"%s\" 0\n"; |
f66fd6c3 | 1905 | } else { |
4ab9dab5 | 1906 | desc_extent_line = "RW %" PRId64 " SPARSE \"%s\"\n"; |
f66fd6c3 FZ |
1907 | } |
1908 | if (flat && backing_file) { | |
4823970b | 1909 | error_setg(errp, "Flat image can't have backing file"); |
af057fe7 FZ |
1910 | ret = -ENOTSUP; |
1911 | goto exit; | |
f66fd6c3 | 1912 | } |
52c8d629 FZ |
1913 | if (flat && zeroed_grain) { |
1914 | error_setg(errp, "Flat image can't enable zeroed grain"); | |
af057fe7 FZ |
1915 | ret = -ENOTSUP; |
1916 | goto exit; | |
52c8d629 | 1917 | } |
f66fd6c3 | 1918 | if (backing_file) { |
f67503e5 | 1919 | BlockDriverState *bs = NULL; |
1085daf9 HR |
1920 | char *full_backing = g_new0(char, PATH_MAX); |
1921 | bdrv_get_full_backing_filename_from_filename(filename, backing_file, | |
1922 | full_backing, PATH_MAX, | |
1923 | &local_err); | |
1924 | if (local_err) { | |
1925 | g_free(full_backing); | |
1926 | error_propagate(errp, local_err); | |
1927 | ret = -ENOENT; | |
1928 | goto exit; | |
1929 | } | |
1930 | ret = bdrv_open(&bs, full_backing, NULL, NULL, BDRV_O_NO_BACKING, NULL, | |
ddf5636d | 1931 | errp); |
1085daf9 | 1932 | g_free(full_backing); |
f66fd6c3 | 1933 | if (ret != 0) { |
af057fe7 | 1934 | goto exit; |
f66fd6c3 FZ |
1935 | } |
1936 | if (strcmp(bs->drv->format_name, "vmdk")) { | |
4f6fd349 | 1937 | bdrv_unref(bs); |
af057fe7 FZ |
1938 | ret = -EINVAL; |
1939 | goto exit; | |
f66fd6c3 | 1940 | } |
f66fd6c3 | 1941 | parent_cid = vmdk_read_cid(bs, 0); |
4f6fd349 | 1942 | bdrv_unref(bs); |
fe206562 | 1943 | snprintf(parent_desc_line, BUF_SIZE, |
8ed610a1 | 1944 | "parentFileNameHint=\"%s\"", backing_file); |
f66fd6c3 FZ |
1945 | } |
1946 | ||
1947 | /* Create extents */ | |
1948 | filesize = total_size; | |
1949 | while (filesize > 0) { | |
f66fd6c3 FZ |
1950 | int64_t size = filesize; |
1951 | ||
1952 | if (split && size > split_size) { | |
1953 | size = split_size; | |
1954 | } | |
1955 | if (split) { | |
fe206562 | 1956 | snprintf(desc_filename, PATH_MAX, "%s-%c%03d%s", |
f66fd6c3 FZ |
1957 | prefix, flat ? 'f' : 's', ++idx, postfix); |
1958 | } else if (flat) { | |
fe206562 | 1959 | snprintf(desc_filename, PATH_MAX, "%s-flat%s", prefix, postfix); |
f66fd6c3 | 1960 | } else { |
fe206562 | 1961 | snprintf(desc_filename, PATH_MAX, "%s%s", prefix, postfix); |
f66fd6c3 | 1962 | } |
fe206562 | 1963 | snprintf(ext_filename, PATH_MAX, "%s%s", path, desc_filename); |
f66fd6c3 | 1964 | |
69e0b6df | 1965 | if (vmdk_create_extent(ext_filename, size, |
4ab15590 | 1966 | flat, compress, zeroed_grain, opts, errp)) { |
af057fe7 FZ |
1967 | ret = -EINVAL; |
1968 | goto exit; | |
f66fd6c3 FZ |
1969 | } |
1970 | filesize -= size; | |
1971 | ||
1972 | /* Format description line */ | |
fe206562 | 1973 | snprintf(desc_line, BUF_SIZE, |
917703c1 | 1974 | desc_extent_line, size / BDRV_SECTOR_SIZE, desc_filename); |
af057fe7 | 1975 | g_string_append(ext_desc_lines, desc_line); |
f66fd6c3 FZ |
1976 | } |
1977 | /* generate descriptor file */ | |
af057fe7 | 1978 | desc = g_strdup_printf(desc_template, |
e5dc64b8 | 1979 | g_random_int(), |
af057fe7 FZ |
1980 | parent_cid, |
1981 | fmt, | |
1982 | parent_desc_line, | |
1983 | ext_desc_lines->str, | |
1984 | (flags & BLOCK_FLAG_COMPAT6 ? 6 : 4), | |
917703c1 FZ |
1985 | total_size / |
1986 | (int64_t)(63 * number_heads * BDRV_SECTOR_SIZE), | |
af057fe7 FZ |
1987 | number_heads, |
1988 | adapter_type); | |
917703c1 FZ |
1989 | desc_len = strlen(desc); |
1990 | /* the descriptor offset = 0x200 */ | |
1991 | if (!split && !flat) { | |
1992 | desc_offset = 0x200; | |
f66fd6c3 | 1993 | } else { |
c282e1fd | 1994 | ret = bdrv_create_file(filename, opts, &local_err); |
917703c1 | 1995 | if (ret < 0) { |
c13959c7 | 1996 | error_propagate(errp, local_err); |
917703c1 FZ |
1997 | goto exit; |
1998 | } | |
f66fd6c3 | 1999 | } |
2e40134b HR |
2000 | assert(new_bs == NULL); |
2001 | ret = bdrv_open(&new_bs, filename, NULL, NULL, | |
2002 | BDRV_O_RDWR | BDRV_O_PROTOCOL, NULL, &local_err); | |
917703c1 | 2003 | if (ret < 0) { |
c13959c7 | 2004 | error_propagate(errp, local_err); |
af057fe7 | 2005 | goto exit; |
f66fd6c3 | 2006 | } |
917703c1 FZ |
2007 | ret = bdrv_pwrite(new_bs, desc_offset, desc, desc_len); |
2008 | if (ret < 0) { | |
2009 | error_setg_errno(errp, -ret, "Could not write description"); | |
2010 | goto exit; | |
f66fd6c3 | 2011 | } |
917703c1 FZ |
2012 | /* bdrv_pwrite write padding zeros to align to sector, we don't need that |
2013 | * for description file */ | |
2014 | if (desc_offset == 0) { | |
2015 | ret = bdrv_truncate(new_bs, desc_len); | |
2016 | if (ret < 0) { | |
39a611a3 | 2017 | error_setg_errno(errp, -ret, "Could not truncate file"); |
917703c1 | 2018 | } |
1640366c | 2019 | } |
af057fe7 | 2020 | exit: |
917703c1 FZ |
2021 | if (new_bs) { |
2022 | bdrv_unref(new_bs); | |
2023 | } | |
5820f1da CL |
2024 | g_free(adapter_type); |
2025 | g_free(backing_file); | |
2026 | g_free(fmt); | |
af057fe7 | 2027 | g_free(desc); |
fe206562 JC |
2028 | g_free(path); |
2029 | g_free(prefix); | |
2030 | g_free(postfix); | |
2031 | g_free(desc_line); | |
2032 | g_free(ext_filename); | |
2033 | g_free(desc_filename); | |
2034 | g_free(parent_desc_line); | |
af057fe7 | 2035 | g_string_free(ext_desc_lines, true); |
1640366c | 2036 | return ret; |
8979b227 FB |
2037 | } |
2038 | ||
e2731add | 2039 | static void vmdk_close(BlockDriverState *bs) |
ea2384d3 | 2040 | { |
2bc3166c KW |
2041 | BDRVVmdkState *s = bs->opaque; |
2042 | ||
b3976d3c | 2043 | vmdk_free_extents(bs); |
f4c129a3 | 2044 | g_free(s->create_type); |
2bc3166c KW |
2045 | |
2046 | migrate_del_blocker(s->migration_blocker); | |
2047 | error_free(s->migration_blocker); | |
ea2384d3 FB |
2048 | } |
2049 | ||
8b94ff85 | 2050 | static coroutine_fn int vmdk_co_flush(BlockDriverState *bs) |
7a6cba61 | 2051 | { |
333c574d | 2052 | BDRVVmdkState *s = bs->opaque; |
29cdb251 PB |
2053 | int i, err; |
2054 | int ret = 0; | |
333c574d | 2055 | |
333c574d | 2056 | for (i = 0; i < s->num_extents; i++) { |
8b94ff85 | 2057 | err = bdrv_co_flush(s->extents[i].file); |
333c574d FZ |
2058 | if (err < 0) { |
2059 | ret = err; | |
2060 | } | |
2061 | } | |
2062 | return ret; | |
7a6cba61 PB |
2063 | } |
2064 | ||
4a1d5e1f FZ |
2065 | static int64_t vmdk_get_allocated_file_size(BlockDriverState *bs) |
2066 | { | |
2067 | int i; | |
2068 | int64_t ret = 0; | |
2069 | int64_t r; | |
2070 | BDRVVmdkState *s = bs->opaque; | |
2071 | ||
2072 | ret = bdrv_get_allocated_file_size(bs->file); | |
2073 | if (ret < 0) { | |
2074 | return ret; | |
2075 | } | |
2076 | for (i = 0; i < s->num_extents; i++) { | |
2077 | if (s->extents[i].file == bs->file) { | |
2078 | continue; | |
2079 | } | |
2080 | r = bdrv_get_allocated_file_size(s->extents[i].file); | |
2081 | if (r < 0) { | |
2082 | return r; | |
2083 | } | |
2084 | ret += r; | |
2085 | } | |
2086 | return ret; | |
2087 | } | |
0e7e1989 | 2088 | |
da7a50f9 FZ |
2089 | static int vmdk_has_zero_init(BlockDriverState *bs) |
2090 | { | |
2091 | int i; | |
2092 | BDRVVmdkState *s = bs->opaque; | |
2093 | ||
2094 | /* If has a flat extent and its underlying storage doesn't have zero init, | |
2095 | * return 0. */ | |
2096 | for (i = 0; i < s->num_extents; i++) { | |
2097 | if (s->extents[i].flat) { | |
2098 | if (!bdrv_has_zero_init(s->extents[i].file)) { | |
2099 | return 0; | |
2100 | } | |
2101 | } | |
2102 | } | |
2103 | return 1; | |
2104 | } | |
2105 | ||
f4c129a3 FZ |
2106 | static ImageInfo *vmdk_get_extent_info(VmdkExtent *extent) |
2107 | { | |
2108 | ImageInfo *info = g_new0(ImageInfo, 1); | |
2109 | ||
2110 | *info = (ImageInfo){ | |
2111 | .filename = g_strdup(extent->file->filename), | |
2112 | .format = g_strdup(extent->type), | |
2113 | .virtual_size = extent->sectors * BDRV_SECTOR_SIZE, | |
2114 | .compressed = extent->compressed, | |
2115 | .has_compressed = extent->compressed, | |
2116 | .cluster_size = extent->cluster_sectors * BDRV_SECTOR_SIZE, | |
2117 | .has_cluster_size = !extent->flat, | |
2118 | }; | |
2119 | ||
2120 | return info; | |
2121 | } | |
2122 | ||
f43aa8e1 PL |
2123 | static int vmdk_check(BlockDriverState *bs, BdrvCheckResult *result, |
2124 | BdrvCheckMode fix) | |
2125 | { | |
2126 | BDRVVmdkState *s = bs->opaque; | |
2127 | VmdkExtent *extent = NULL; | |
2128 | int64_t sector_num = 0; | |
57322b78 | 2129 | int64_t total_sectors = bdrv_nb_sectors(bs); |
f43aa8e1 PL |
2130 | int ret; |
2131 | uint64_t cluster_offset; | |
2132 | ||
2133 | if (fix) { | |
2134 | return -ENOTSUP; | |
2135 | } | |
2136 | ||
2137 | for (;;) { | |
2138 | if (sector_num >= total_sectors) { | |
2139 | return 0; | |
2140 | } | |
2141 | extent = find_extent(s, sector_num, extent); | |
2142 | if (!extent) { | |
2143 | fprintf(stderr, | |
2144 | "ERROR: could not find extent for sector %" PRId64 "\n", | |
2145 | sector_num); | |
2146 | break; | |
2147 | } | |
2148 | ret = get_cluster_offset(bs, extent, NULL, | |
2149 | sector_num << BDRV_SECTOR_BITS, | |
c6ac36e1 | 2150 | false, &cluster_offset, 0, 0); |
f43aa8e1 PL |
2151 | if (ret == VMDK_ERROR) { |
2152 | fprintf(stderr, | |
2153 | "ERROR: could not get cluster_offset for sector %" | |
2154 | PRId64 "\n", sector_num); | |
2155 | break; | |
2156 | } | |
2157 | if (ret == VMDK_OK && cluster_offset >= bdrv_getlength(extent->file)) { | |
2158 | fprintf(stderr, | |
2159 | "ERROR: cluster offset for sector %" | |
2160 | PRId64 " points after EOF\n", sector_num); | |
2161 | break; | |
2162 | } | |
2163 | sector_num += extent->cluster_sectors; | |
2164 | } | |
2165 | ||
2166 | result->corruptions++; | |
2167 | return 0; | |
2168 | } | |
2169 | ||
f4c129a3 FZ |
2170 | static ImageInfoSpecific *vmdk_get_specific_info(BlockDriverState *bs) |
2171 | { | |
2172 | int i; | |
2173 | BDRVVmdkState *s = bs->opaque; | |
2174 | ImageInfoSpecific *spec_info = g_new0(ImageInfoSpecific, 1); | |
2175 | ImageInfoList **next; | |
2176 | ||
2177 | *spec_info = (ImageInfoSpecific){ | |
2178 | .kind = IMAGE_INFO_SPECIFIC_KIND_VMDK, | |
2179 | { | |
2180 | .vmdk = g_new0(ImageInfoSpecificVmdk, 1), | |
2181 | }, | |
2182 | }; | |
2183 | ||
2184 | *spec_info->vmdk = (ImageInfoSpecificVmdk) { | |
2185 | .create_type = g_strdup(s->create_type), | |
2186 | .cid = s->cid, | |
2187 | .parent_cid = s->parent_cid, | |
2188 | }; | |
2189 | ||
2190 | next = &spec_info->vmdk->extents; | |
2191 | for (i = 0; i < s->num_extents; i++) { | |
2192 | *next = g_new0(ImageInfoList, 1); | |
2193 | (*next)->value = vmdk_get_extent_info(&s->extents[i]); | |
2194 | (*next)->next = NULL; | |
2195 | next = &(*next)->next; | |
2196 | } | |
2197 | ||
2198 | return spec_info; | |
2199 | } | |
2200 | ||
5f583307 FZ |
2201 | static bool vmdk_extents_type_eq(const VmdkExtent *a, const VmdkExtent *b) |
2202 | { | |
2203 | return a->flat == b->flat && | |
2204 | a->compressed == b->compressed && | |
2205 | (a->flat || a->cluster_sectors == b->cluster_sectors); | |
2206 | } | |
2207 | ||
74fe188c FZ |
2208 | static int vmdk_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) |
2209 | { | |
2210 | int i; | |
2211 | BDRVVmdkState *s = bs->opaque; | |
2212 | assert(s->num_extents); | |
5f583307 | 2213 | |
74fe188c FZ |
2214 | /* See if we have multiple extents but they have different cases */ |
2215 | for (i = 1; i < s->num_extents; i++) { | |
5f583307 | 2216 | if (!vmdk_extents_type_eq(&s->extents[0], &s->extents[i])) { |
74fe188c FZ |
2217 | return -ENOTSUP; |
2218 | } | |
2219 | } | |
5f583307 FZ |
2220 | bdi->needs_compressed_writes = s->extents[0].compressed; |
2221 | if (!s->extents[0].flat) { | |
2222 | bdi->cluster_size = s->extents[0].cluster_sectors << BDRV_SECTOR_BITS; | |
2223 | } | |
74fe188c FZ |
2224 | return 0; |
2225 | } | |
2226 | ||
c75f3bdf SH |
2227 | static void vmdk_detach_aio_context(BlockDriverState *bs) |
2228 | { | |
2229 | BDRVVmdkState *s = bs->opaque; | |
2230 | int i; | |
2231 | ||
2232 | for (i = 0; i < s->num_extents; i++) { | |
2233 | bdrv_detach_aio_context(s->extents[i].file); | |
2234 | } | |
2235 | } | |
2236 | ||
2237 | static void vmdk_attach_aio_context(BlockDriverState *bs, | |
2238 | AioContext *new_context) | |
2239 | { | |
2240 | BDRVVmdkState *s = bs->opaque; | |
2241 | int i; | |
2242 | ||
2243 | for (i = 0; i < s->num_extents; i++) { | |
2244 | bdrv_attach_aio_context(s->extents[i].file, new_context); | |
2245 | } | |
2246 | } | |
2247 | ||
5820f1da CL |
2248 | static QemuOptsList vmdk_create_opts = { |
2249 | .name = "vmdk-create-opts", | |
2250 | .head = QTAILQ_HEAD_INITIALIZER(vmdk_create_opts.head), | |
2251 | .desc = { | |
2252 | { | |
2253 | .name = BLOCK_OPT_SIZE, | |
2254 | .type = QEMU_OPT_SIZE, | |
2255 | .help = "Virtual disk size" | |
2256 | }, | |
2257 | { | |
2258 | .name = BLOCK_OPT_ADAPTER_TYPE, | |
2259 | .type = QEMU_OPT_STRING, | |
2260 | .help = "Virtual adapter type, can be one of " | |
2261 | "ide (default), lsilogic, buslogic or legacyESX" | |
2262 | }, | |
2263 | { | |
2264 | .name = BLOCK_OPT_BACKING_FILE, | |
2265 | .type = QEMU_OPT_STRING, | |
2266 | .help = "File name of a base image" | |
2267 | }, | |
2268 | { | |
2269 | .name = BLOCK_OPT_COMPAT6, | |
2270 | .type = QEMU_OPT_BOOL, | |
2271 | .help = "VMDK version 6 image", | |
2272 | .def_value_str = "off" | |
2273 | }, | |
2274 | { | |
2275 | .name = BLOCK_OPT_SUBFMT, | |
2276 | .type = QEMU_OPT_STRING, | |
2277 | .help = | |
2278 | "VMDK flat extent format, can be one of " | |
2279 | "{monolithicSparse (default) | monolithicFlat | twoGbMaxExtentSparse | twoGbMaxExtentFlat | streamOptimized} " | |
2280 | }, | |
2281 | { | |
2282 | .name = BLOCK_OPT_ZEROED_GRAIN, | |
2283 | .type = QEMU_OPT_BOOL, | |
2284 | .help = "Enable efficient zero writes " | |
2285 | "using the zeroed-grain GTE feature" | |
2286 | }, | |
2287 | { /* end of list */ } | |
2288 | } | |
0e7e1989 KW |
2289 | }; |
2290 | ||
5efa9d5a | 2291 | static BlockDriver bdrv_vmdk = { |
da7a50f9 FZ |
2292 | .format_name = "vmdk", |
2293 | .instance_size = sizeof(BDRVVmdkState), | |
2294 | .bdrv_probe = vmdk_probe, | |
2295 | .bdrv_open = vmdk_open, | |
f43aa8e1 | 2296 | .bdrv_check = vmdk_check, |
da7a50f9 FZ |
2297 | .bdrv_reopen_prepare = vmdk_reopen_prepare, |
2298 | .bdrv_read = vmdk_co_read, | |
2299 | .bdrv_write = vmdk_co_write, | |
ba0ad89e | 2300 | .bdrv_write_compressed = vmdk_write_compressed, |
da7a50f9 FZ |
2301 | .bdrv_co_write_zeroes = vmdk_co_write_zeroes, |
2302 | .bdrv_close = vmdk_close, | |
c282e1fd | 2303 | .bdrv_create = vmdk_create, |
da7a50f9 | 2304 | .bdrv_co_flush_to_disk = vmdk_co_flush, |
b6b8a333 | 2305 | .bdrv_co_get_block_status = vmdk_co_get_block_status, |
da7a50f9 FZ |
2306 | .bdrv_get_allocated_file_size = vmdk_get_allocated_file_size, |
2307 | .bdrv_has_zero_init = vmdk_has_zero_init, | |
f4c129a3 | 2308 | .bdrv_get_specific_info = vmdk_get_specific_info, |
d34682cd | 2309 | .bdrv_refresh_limits = vmdk_refresh_limits, |
74fe188c | 2310 | .bdrv_get_info = vmdk_get_info, |
c75f3bdf SH |
2311 | .bdrv_detach_aio_context = vmdk_detach_aio_context, |
2312 | .bdrv_attach_aio_context = vmdk_attach_aio_context, | |
da7a50f9 | 2313 | |
8ee79e70 | 2314 | .supports_backing = true, |
5820f1da | 2315 | .create_opts = &vmdk_create_opts, |
ea2384d3 | 2316 | }; |
5efa9d5a AL |
2317 | |
2318 | static void bdrv_vmdk_init(void) | |
2319 | { | |
2320 | bdrv_register(&bdrv_vmdk); | |
2321 | } | |
2322 | ||
2323 | block_init(bdrv_vmdk_init); |