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