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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" |
ea2384d3 | 27 | #include "block_int.h" |
5efa9d5a | 28 | #include "module.h" |
ea2384d3 | 29 | |
ea2384d3 FB |
30 | #define VMDK3_MAGIC (('C' << 24) | ('O' << 16) | ('W' << 8) | 'D') |
31 | #define VMDK4_MAGIC (('K' << 24) | ('D' << 16) | ('M' << 8) | 'V') | |
32 | ||
33 | typedef struct { | |
34 | uint32_t version; | |
35 | uint32_t flags; | |
36 | uint32_t disk_sectors; | |
37 | uint32_t granularity; | |
38 | uint32_t l1dir_offset; | |
39 | uint32_t l1dir_size; | |
40 | uint32_t file_sectors; | |
41 | uint32_t cylinders; | |
42 | uint32_t heads; | |
43 | uint32_t sectors_per_track; | |
44 | } VMDK3Header; | |
45 | ||
46 | typedef struct { | |
47 | uint32_t version; | |
48 | uint32_t flags; | |
49 | int64_t capacity; | |
50 | int64_t granularity; | |
51 | int64_t desc_offset; | |
52 | int64_t desc_size; | |
53 | int32_t num_gtes_per_gte; | |
54 | int64_t rgd_offset; | |
55 | int64_t gd_offset; | |
56 | int64_t grain_offset; | |
57 | char filler[1]; | |
58 | char check_bytes[4]; | |
541dc0d4 | 59 | } QEMU_PACKED VMDK4Header; |
ea2384d3 FB |
60 | |
61 | #define L2_CACHE_SIZE 16 | |
62 | ||
b3976d3c FZ |
63 | typedef struct VmdkExtent { |
64 | BlockDriverState *file; | |
65 | bool flat; | |
66 | int64_t sectors; | |
67 | int64_t end_sector; | |
7fa60fa3 | 68 | int64_t flat_start_offset; |
ea2384d3 | 69 | int64_t l1_table_offset; |
ff1afc72 | 70 | int64_t l1_backup_table_offset; |
ea2384d3 | 71 | uint32_t *l1_table; |
ff1afc72 | 72 | uint32_t *l1_backup_table; |
ea2384d3 FB |
73 | unsigned int l1_size; |
74 | uint32_t l1_entry_sectors; | |
75 | ||
76 | unsigned int l2_size; | |
77 | uint32_t *l2_cache; | |
78 | uint32_t l2_cache_offsets[L2_CACHE_SIZE]; | |
79 | uint32_t l2_cache_counts[L2_CACHE_SIZE]; | |
80 | ||
81 | unsigned int cluster_sectors; | |
b3976d3c FZ |
82 | } VmdkExtent; |
83 | ||
84 | typedef struct BDRVVmdkState { | |
e1da9b24 | 85 | int desc_offset; |
69b4d86d | 86 | bool cid_updated; |
5f4da8c0 | 87 | uint32_t parent_cid; |
b3976d3c FZ |
88 | int num_extents; |
89 | /* Extent array with num_extents entries, ascend ordered by address */ | |
90 | VmdkExtent *extents; | |
ea2384d3 FB |
91 | } BDRVVmdkState; |
92 | ||
630530a6 TS |
93 | typedef struct VmdkMetaData { |
94 | uint32_t offset; | |
95 | unsigned int l1_index; | |
96 | unsigned int l2_index; | |
97 | unsigned int l2_offset; | |
98 | int valid; | |
99 | } VmdkMetaData; | |
100 | ||
ea2384d3 FB |
101 | static int vmdk_probe(const uint8_t *buf, int buf_size, const char *filename) |
102 | { | |
103 | uint32_t magic; | |
104 | ||
ae261c86 | 105 | if (buf_size < 4) { |
ea2384d3 | 106 | return 0; |
ae261c86 | 107 | } |
ea2384d3 FB |
108 | magic = be32_to_cpu(*(uint32_t *)buf); |
109 | if (magic == VMDK3_MAGIC || | |
01fc99d6 | 110 | magic == VMDK4_MAGIC) { |
ea2384d3 | 111 | return 100; |
01fc99d6 FZ |
112 | } else { |
113 | const char *p = (const char *)buf; | |
114 | const char *end = p + buf_size; | |
115 | while (p < end) { | |
116 | if (*p == '#') { | |
117 | /* skip comment line */ | |
118 | while (p < end && *p != '\n') { | |
119 | p++; | |
120 | } | |
121 | p++; | |
122 | continue; | |
123 | } | |
124 | if (*p == ' ') { | |
125 | while (p < end && *p == ' ') { | |
126 | p++; | |
127 | } | |
128 | /* skip '\r' if windows line endings used. */ | |
129 | if (p < end && *p == '\r') { | |
130 | p++; | |
131 | } | |
132 | /* only accept blank lines before 'version=' line */ | |
133 | if (p == end || *p != '\n') { | |
134 | return 0; | |
135 | } | |
136 | p++; | |
137 | continue; | |
138 | } | |
139 | if (end - p >= strlen("version=X\n")) { | |
140 | if (strncmp("version=1\n", p, strlen("version=1\n")) == 0 || | |
141 | strncmp("version=2\n", p, strlen("version=2\n")) == 0) { | |
142 | return 100; | |
143 | } | |
144 | } | |
145 | if (end - p >= strlen("version=X\r\n")) { | |
146 | if (strncmp("version=1\r\n", p, strlen("version=1\r\n")) == 0 || | |
147 | strncmp("version=2\r\n", p, strlen("version=2\r\n")) == 0) { | |
148 | return 100; | |
149 | } | |
150 | } | |
151 | return 0; | |
152 | } | |
ea2384d3 | 153 | return 0; |
01fc99d6 | 154 | } |
ea2384d3 FB |
155 | } |
156 | ||
5f4da8c0 TS |
157 | #define CHECK_CID 1 |
158 | ||
3b46e624 | 159 | #define SECTOR_SIZE 512 |
f66fd6c3 FZ |
160 | #define DESC_SIZE (20 * SECTOR_SIZE) /* 20 sectors of 512 bytes each */ |
161 | #define BUF_SIZE 4096 | |
162 | #define HEADER_SIZE 512 /* first sector of 512 bytes */ | |
5f4da8c0 | 163 | |
b3976d3c FZ |
164 | static void vmdk_free_extents(BlockDriverState *bs) |
165 | { | |
166 | int i; | |
167 | BDRVVmdkState *s = bs->opaque; | |
168 | ||
169 | for (i = 0; i < s->num_extents; i++) { | |
7267c094 AL |
170 | g_free(s->extents[i].l1_table); |
171 | g_free(s->extents[i].l2_cache); | |
172 | g_free(s->extents[i].l1_backup_table); | |
b3976d3c | 173 | } |
7267c094 | 174 | g_free(s->extents); |
b3976d3c FZ |
175 | } |
176 | ||
86c6b429 FZ |
177 | static void vmdk_free_last_extent(BlockDriverState *bs) |
178 | { | |
179 | BDRVVmdkState *s = bs->opaque; | |
180 | ||
181 | if (s->num_extents == 0) { | |
182 | return; | |
183 | } | |
184 | s->num_extents--; | |
185 | s->extents = g_realloc(s->extents, s->num_extents * sizeof(VmdkExtent)); | |
186 | } | |
187 | ||
5f4da8c0 | 188 | static uint32_t vmdk_read_cid(BlockDriverState *bs, int parent) |
ea2384d3 | 189 | { |
5f4da8c0 TS |
190 | char desc[DESC_SIZE]; |
191 | uint32_t cid; | |
7ccfb2eb | 192 | const char *p_name, *cid_str; |
5f4da8c0 | 193 | size_t cid_str_size; |
e1da9b24 | 194 | BDRVVmdkState *s = bs->opaque; |
5f4da8c0 | 195 | |
e1da9b24 | 196 | if (bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE) != DESC_SIZE) { |
5f4da8c0 | 197 | return 0; |
e1da9b24 | 198 | } |
5f4da8c0 TS |
199 | |
200 | if (parent) { | |
201 | cid_str = "parentCID"; | |
202 | cid_str_size = sizeof("parentCID"); | |
203 | } else { | |
204 | cid_str = "CID"; | |
205 | cid_str_size = sizeof("CID"); | |
206 | } | |
207 | ||
ae261c86 FZ |
208 | p_name = strstr(desc, cid_str); |
209 | if (p_name != NULL) { | |
5f4da8c0 | 210 | p_name += cid_str_size; |
ae261c86 | 211 | sscanf(p_name, "%x", &cid); |
5f4da8c0 TS |
212 | } |
213 | ||
214 | return cid; | |
215 | } | |
216 | ||
217 | static int vmdk_write_cid(BlockDriverState *bs, uint32_t cid) | |
218 | { | |
5f4da8c0 TS |
219 | char desc[DESC_SIZE], tmp_desc[DESC_SIZE]; |
220 | char *p_name, *tmp_str; | |
e1da9b24 | 221 | BDRVVmdkState *s = bs->opaque; |
5f4da8c0 | 222 | |
e1da9b24 FZ |
223 | memset(desc, 0, sizeof(desc)); |
224 | if (bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE) != DESC_SIZE) { | |
225 | return -EIO; | |
226 | } | |
5f4da8c0 | 227 | |
ae261c86 | 228 | tmp_str = strstr(desc, "parentCID"); |
363a37d5 | 229 | pstrcpy(tmp_desc, sizeof(tmp_desc), tmp_str); |
ae261c86 FZ |
230 | p_name = strstr(desc, "CID"); |
231 | if (p_name != NULL) { | |
5f4da8c0 | 232 | p_name += sizeof("CID"); |
363a37d5 BS |
233 | snprintf(p_name, sizeof(desc) - (p_name - desc), "%x\n", cid); |
234 | pstrcat(desc, sizeof(desc), tmp_desc); | |
5f4da8c0 TS |
235 | } |
236 | ||
e1da9b24 FZ |
237 | if (bdrv_pwrite_sync(bs->file, s->desc_offset, desc, DESC_SIZE) < 0) { |
238 | return -EIO; | |
239 | } | |
5f4da8c0 TS |
240 | return 0; |
241 | } | |
242 | ||
243 | static int vmdk_is_cid_valid(BlockDriverState *bs) | |
244 | { | |
245 | #ifdef CHECK_CID | |
246 | BDRVVmdkState *s = bs->opaque; | |
b171271a | 247 | BlockDriverState *p_bs = bs->backing_hd; |
5f4da8c0 TS |
248 | uint32_t cur_pcid; |
249 | ||
250 | if (p_bs) { | |
ae261c86 FZ |
251 | cur_pcid = vmdk_read_cid(p_bs, 0); |
252 | if (s->parent_cid != cur_pcid) { | |
253 | /* CID not valid */ | |
5f4da8c0 | 254 | return 0; |
ae261c86 | 255 | } |
5f4da8c0 TS |
256 | } |
257 | #endif | |
ae261c86 | 258 | /* CID valid */ |
5f4da8c0 TS |
259 | return 1; |
260 | } | |
261 | ||
9949f97e | 262 | static int vmdk_parent_open(BlockDriverState *bs) |
5f4da8c0 | 263 | { |
5fafdf24 | 264 | char *p_name; |
7fa60fa3 | 265 | char desc[DESC_SIZE + 1]; |
e1da9b24 | 266 | BDRVVmdkState *s = bs->opaque; |
5f4da8c0 | 267 | |
7fa60fa3 | 268 | desc[DESC_SIZE] = '\0'; |
e1da9b24 | 269 | if (bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE) != DESC_SIZE) { |
5f4da8c0 | 270 | return -1; |
e1da9b24 | 271 | } |
5f4da8c0 | 272 | |
ae261c86 FZ |
273 | p_name = strstr(desc, "parentFileNameHint"); |
274 | if (p_name != NULL) { | |
5f4da8c0 | 275 | char *end_name; |
5f4da8c0 TS |
276 | |
277 | p_name += sizeof("parentFileNameHint") + 1; | |
ae261c86 FZ |
278 | end_name = strchr(p_name, '\"'); |
279 | if (end_name == NULL) { | |
5f4da8c0 | 280 | return -1; |
ae261c86 FZ |
281 | } |
282 | if ((end_name - p_name) > sizeof(bs->backing_file) - 1) { | |
b34d259a | 283 | return -1; |
ae261c86 | 284 | } |
3b46e624 | 285 | |
b171271a | 286 | pstrcpy(bs->backing_file, end_name - p_name + 1, p_name); |
ff1afc72 | 287 | } |
5f4da8c0 TS |
288 | |
289 | return 0; | |
290 | } | |
291 | ||
b3976d3c FZ |
292 | /* Create and append extent to the extent array. Return the added VmdkExtent |
293 | * address. return NULL if allocation failed. */ | |
294 | static VmdkExtent *vmdk_add_extent(BlockDriverState *bs, | |
295 | BlockDriverState *file, bool flat, int64_t sectors, | |
296 | int64_t l1_offset, int64_t l1_backup_offset, | |
297 | uint32_t l1_size, | |
298 | int l2_size, unsigned int cluster_sectors) | |
299 | { | |
300 | VmdkExtent *extent; | |
301 | BDRVVmdkState *s = bs->opaque; | |
302 | ||
7267c094 | 303 | s->extents = g_realloc(s->extents, |
b3976d3c FZ |
304 | (s->num_extents + 1) * sizeof(VmdkExtent)); |
305 | extent = &s->extents[s->num_extents]; | |
306 | s->num_extents++; | |
307 | ||
308 | memset(extent, 0, sizeof(VmdkExtent)); | |
309 | extent->file = file; | |
310 | extent->flat = flat; | |
311 | extent->sectors = sectors; | |
312 | extent->l1_table_offset = l1_offset; | |
313 | extent->l1_backup_table_offset = l1_backup_offset; | |
314 | extent->l1_size = l1_size; | |
315 | extent->l1_entry_sectors = l2_size * cluster_sectors; | |
316 | extent->l2_size = l2_size; | |
317 | extent->cluster_sectors = cluster_sectors; | |
318 | ||
319 | if (s->num_extents > 1) { | |
320 | extent->end_sector = (*(extent - 1)).end_sector + extent->sectors; | |
321 | } else { | |
322 | extent->end_sector = extent->sectors; | |
323 | } | |
324 | bs->total_sectors = extent->end_sector; | |
325 | return extent; | |
326 | } | |
327 | ||
b4b3ab14 | 328 | static int vmdk_init_tables(BlockDriverState *bs, VmdkExtent *extent) |
5f4da8c0 | 329 | { |
b4b3ab14 FZ |
330 | int ret; |
331 | int l1_size, i; | |
5f4da8c0 | 332 | |
ea2384d3 | 333 | /* read the L1 table */ |
b3976d3c | 334 | l1_size = extent->l1_size * sizeof(uint32_t); |
7267c094 | 335 | extent->l1_table = g_malloc(l1_size); |
b4b3ab14 FZ |
336 | ret = bdrv_pread(extent->file, |
337 | extent->l1_table_offset, | |
338 | extent->l1_table, | |
339 | l1_size); | |
340 | if (ret < 0) { | |
341 | goto fail_l1; | |
b3976d3c FZ |
342 | } |
343 | for (i = 0; i < extent->l1_size; i++) { | |
344 | le32_to_cpus(&extent->l1_table[i]); | |
ea2384d3 FB |
345 | } |
346 | ||
b3976d3c | 347 | if (extent->l1_backup_table_offset) { |
7267c094 | 348 | extent->l1_backup_table = g_malloc(l1_size); |
b4b3ab14 FZ |
349 | ret = bdrv_pread(extent->file, |
350 | extent->l1_backup_table_offset, | |
351 | extent->l1_backup_table, | |
352 | l1_size); | |
353 | if (ret < 0) { | |
354 | goto fail_l1b; | |
b3976d3c FZ |
355 | } |
356 | for (i = 0; i < extent->l1_size; i++) { | |
357 | le32_to_cpus(&extent->l1_backup_table[i]); | |
ff1afc72 FB |
358 | } |
359 | } | |
360 | ||
b3976d3c | 361 | extent->l2_cache = |
7267c094 | 362 | g_malloc(extent->l2_size * L2_CACHE_SIZE * sizeof(uint32_t)); |
ea2384d3 | 363 | return 0; |
b4b3ab14 | 364 | fail_l1b: |
7267c094 | 365 | g_free(extent->l1_backup_table); |
b4b3ab14 | 366 | fail_l1: |
7267c094 | 367 | g_free(extent->l1_table); |
b4b3ab14 FZ |
368 | return ret; |
369 | } | |
370 | ||
86c6b429 FZ |
371 | static int vmdk_open_vmdk3(BlockDriverState *bs, |
372 | BlockDriverState *file, | |
373 | int flags) | |
b4b3ab14 FZ |
374 | { |
375 | int ret; | |
376 | uint32_t magic; | |
377 | VMDK3Header header; | |
378 | VmdkExtent *extent; | |
379 | ||
86c6b429 | 380 | ret = bdrv_pread(file, sizeof(magic), &header, sizeof(header)); |
b4b3ab14 | 381 | if (ret < 0) { |
86c6b429 | 382 | return ret; |
b4b3ab14 FZ |
383 | } |
384 | extent = vmdk_add_extent(bs, | |
385 | bs->file, false, | |
386 | le32_to_cpu(header.disk_sectors), | |
387 | le32_to_cpu(header.l1dir_offset) << 9, | |
388 | 0, 1 << 6, 1 << 9, | |
389 | le32_to_cpu(header.granularity)); | |
390 | ret = vmdk_init_tables(bs, extent); | |
391 | if (ret) { | |
86c6b429 FZ |
392 | /* free extent allocated by vmdk_add_extent */ |
393 | vmdk_free_last_extent(bs); | |
b4b3ab14 | 394 | } |
b4b3ab14 FZ |
395 | return ret; |
396 | } | |
397 | ||
86c6b429 FZ |
398 | static int vmdk_open_vmdk4(BlockDriverState *bs, |
399 | BlockDriverState *file, | |
400 | int flags) | |
b4b3ab14 FZ |
401 | { |
402 | int ret; | |
403 | uint32_t magic; | |
404 | uint32_t l1_size, l1_entry_sectors; | |
405 | VMDK4Header header; | |
b4b3ab14 FZ |
406 | VmdkExtent *extent; |
407 | ||
86c6b429 | 408 | ret = bdrv_pread(file, sizeof(magic), &header, sizeof(header)); |
b4b3ab14 | 409 | if (ret < 0) { |
86c6b429 | 410 | return ret; |
b4b3ab14 FZ |
411 | } |
412 | l1_entry_sectors = le32_to_cpu(header.num_gtes_per_gte) | |
413 | * le64_to_cpu(header.granularity); | |
86c6b429 FZ |
414 | if (l1_entry_sectors <= 0) { |
415 | return -EINVAL; | |
416 | } | |
b4b3ab14 FZ |
417 | l1_size = (le64_to_cpu(header.capacity) + l1_entry_sectors - 1) |
418 | / l1_entry_sectors; | |
86c6b429 | 419 | extent = vmdk_add_extent(bs, file, false, |
b4b3ab14 FZ |
420 | le64_to_cpu(header.capacity), |
421 | le64_to_cpu(header.gd_offset) << 9, | |
422 | le64_to_cpu(header.rgd_offset) << 9, | |
423 | l1_size, | |
424 | le32_to_cpu(header.num_gtes_per_gte), | |
425 | le64_to_cpu(header.granularity)); | |
b4b3ab14 FZ |
426 | ret = vmdk_init_tables(bs, extent); |
427 | if (ret) { | |
86c6b429 FZ |
428 | /* free extent allocated by vmdk_add_extent */ |
429 | vmdk_free_last_extent(bs); | |
b4b3ab14 | 430 | } |
b4b3ab14 FZ |
431 | return ret; |
432 | } | |
433 | ||
7fa60fa3 FZ |
434 | /* find an option value out of descriptor file */ |
435 | static int vmdk_parse_description(const char *desc, const char *opt_name, | |
436 | char *buf, int buf_size) | |
437 | { | |
438 | char *opt_pos, *opt_end; | |
439 | const char *end = desc + strlen(desc); | |
440 | ||
441 | opt_pos = strstr(desc, opt_name); | |
442 | if (!opt_pos) { | |
443 | return -1; | |
444 | } | |
445 | /* Skip "=\"" following opt_name */ | |
446 | opt_pos += strlen(opt_name) + 2; | |
447 | if (opt_pos >= end) { | |
448 | return -1; | |
449 | } | |
450 | opt_end = opt_pos; | |
451 | while (opt_end < end && *opt_end != '"') { | |
452 | opt_end++; | |
453 | } | |
454 | if (opt_end == end || buf_size < opt_end - opt_pos + 1) { | |
455 | return -1; | |
456 | } | |
457 | pstrcpy(buf, opt_end - opt_pos + 1, opt_pos); | |
458 | return 0; | |
459 | } | |
460 | ||
86c6b429 FZ |
461 | /* Open an extent file and append to bs array */ |
462 | static int vmdk_open_sparse(BlockDriverState *bs, | |
463 | BlockDriverState *file, | |
464 | int flags) | |
465 | { | |
466 | uint32_t magic; | |
467 | ||
468 | if (bdrv_pread(file, 0, &magic, sizeof(magic)) != sizeof(magic)) { | |
469 | return -EIO; | |
470 | } | |
471 | ||
472 | magic = be32_to_cpu(magic); | |
473 | switch (magic) { | |
474 | case VMDK3_MAGIC: | |
475 | return vmdk_open_vmdk3(bs, file, flags); | |
476 | break; | |
477 | case VMDK4_MAGIC: | |
478 | return vmdk_open_vmdk4(bs, file, flags); | |
479 | break; | |
480 | default: | |
481 | return -EINVAL; | |
482 | break; | |
483 | } | |
484 | } | |
485 | ||
7fa60fa3 FZ |
486 | static int vmdk_parse_extents(const char *desc, BlockDriverState *bs, |
487 | const char *desc_file_path) | |
488 | { | |
489 | int ret; | |
490 | char access[11]; | |
491 | char type[11]; | |
492 | char fname[512]; | |
493 | const char *p = desc; | |
494 | int64_t sectors = 0; | |
495 | int64_t flat_offset; | |
86c6b429 FZ |
496 | char extent_path[PATH_MAX]; |
497 | BlockDriverState *extent_file; | |
7fa60fa3 FZ |
498 | |
499 | while (*p) { | |
500 | /* parse extent line: | |
501 | * RW [size in sectors] FLAT "file-name.vmdk" OFFSET | |
502 | * or | |
503 | * RW [size in sectors] SPARSE "file-name.vmdk" | |
504 | */ | |
505 | flat_offset = -1; | |
506 | ret = sscanf(p, "%10s %" SCNd64 " %10s %511s %" SCNd64, | |
507 | access, §ors, type, fname, &flat_offset); | |
508 | if (ret < 4 || strcmp(access, "RW")) { | |
509 | goto next_line; | |
510 | } else if (!strcmp(type, "FLAT")) { | |
511 | if (ret != 5 || flat_offset < 0) { | |
512 | return -EINVAL; | |
513 | } | |
514 | } else if (ret != 4) { | |
515 | return -EINVAL; | |
516 | } | |
517 | ||
518 | /* trim the quotation marks around */ | |
519 | if (fname[0] == '"') { | |
520 | memmove(fname, fname + 1, strlen(fname)); | |
521 | if (strlen(fname) <= 1 || fname[strlen(fname) - 1] != '"') { | |
522 | return -EINVAL; | |
523 | } | |
524 | fname[strlen(fname) - 1] = '\0'; | |
525 | } | |
526 | if (sectors <= 0 || | |
527 | (strcmp(type, "FLAT") && strcmp(type, "SPARSE")) || | |
528 | (strcmp(access, "RW"))) { | |
529 | goto next_line; | |
530 | } | |
531 | ||
86c6b429 FZ |
532 | path_combine(extent_path, sizeof(extent_path), |
533 | desc_file_path, fname); | |
534 | ret = bdrv_file_open(&extent_file, extent_path, bs->open_flags); | |
535 | if (ret) { | |
536 | return ret; | |
537 | } | |
538 | ||
7fa60fa3 FZ |
539 | /* save to extents array */ |
540 | if (!strcmp(type, "FLAT")) { | |
541 | /* FLAT extent */ | |
7fa60fa3 FZ |
542 | VmdkExtent *extent; |
543 | ||
7fa60fa3 FZ |
544 | extent = vmdk_add_extent(bs, extent_file, true, sectors, |
545 | 0, 0, 0, 0, sectors); | |
546 | extent->flat_start_offset = flat_offset; | |
86c6b429 FZ |
547 | } else if (!strcmp(type, "SPARSE")) { |
548 | /* SPARSE extent */ | |
549 | ret = vmdk_open_sparse(bs, extent_file, bs->open_flags); | |
550 | if (ret) { | |
551 | bdrv_delete(extent_file); | |
552 | return ret; | |
553 | } | |
7fa60fa3 | 554 | } else { |
7fa60fa3 FZ |
555 | fprintf(stderr, |
556 | "VMDK: Not supported extent type \"%s\""".\n", type); | |
557 | return -ENOTSUP; | |
558 | } | |
559 | next_line: | |
560 | /* move to next line */ | |
561 | while (*p && *p != '\n') { | |
562 | p++; | |
563 | } | |
564 | p++; | |
565 | } | |
566 | return 0; | |
567 | } | |
568 | ||
569 | static int vmdk_open_desc_file(BlockDriverState *bs, int flags) | |
570 | { | |
571 | int ret; | |
572 | char buf[2048]; | |
573 | char ct[128]; | |
574 | BDRVVmdkState *s = bs->opaque; | |
575 | ||
576 | ret = bdrv_pread(bs->file, 0, buf, sizeof(buf)); | |
577 | if (ret < 0) { | |
578 | return ret; | |
579 | } | |
580 | buf[2047] = '\0'; | |
581 | if (vmdk_parse_description(buf, "createType", ct, sizeof(ct))) { | |
582 | return -EINVAL; | |
583 | } | |
6398de51 | 584 | if (strcmp(ct, "monolithicFlat") && |
86c6b429 | 585 | strcmp(ct, "twoGbMaxExtentSparse") && |
6398de51 | 586 | strcmp(ct, "twoGbMaxExtentFlat")) { |
7fa60fa3 FZ |
587 | fprintf(stderr, |
588 | "VMDK: Not supported image type \"%s\""".\n", ct); | |
589 | return -ENOTSUP; | |
590 | } | |
591 | s->desc_offset = 0; | |
592 | ret = vmdk_parse_extents(buf, bs, bs->file->filename); | |
593 | if (ret) { | |
594 | return ret; | |
595 | } | |
596 | ||
597 | /* try to open parent images, if exist */ | |
598 | if (vmdk_parent_open(bs)) { | |
7267c094 | 599 | g_free(s->extents); |
7fa60fa3 FZ |
600 | return -EINVAL; |
601 | } | |
602 | s->parent_cid = vmdk_read_cid(bs, 1); | |
603 | return 0; | |
604 | } | |
605 | ||
b4b3ab14 FZ |
606 | static int vmdk_open(BlockDriverState *bs, int flags) |
607 | { | |
86c6b429 FZ |
608 | int ret; |
609 | BDRVVmdkState *s = bs->opaque; | |
b4b3ab14 | 610 | |
86c6b429 FZ |
611 | if (vmdk_open_sparse(bs, bs->file, flags) == 0) { |
612 | s->desc_offset = 0x200; | |
613 | /* try to open parent images, if exist */ | |
614 | ret = vmdk_parent_open(bs); | |
615 | if (ret) { | |
616 | vmdk_free_extents(bs); | |
617 | return ret; | |
618 | } | |
619 | s->parent_cid = vmdk_read_cid(bs, 1); | |
620 | return 0; | |
b4b3ab14 | 621 | } else { |
7fa60fa3 | 622 | return vmdk_open_desc_file(bs, flags); |
b4b3ab14 | 623 | } |
ea2384d3 FB |
624 | } |
625 | ||
b3976d3c FZ |
626 | static int get_whole_cluster(BlockDriverState *bs, |
627 | VmdkExtent *extent, | |
628 | uint64_t cluster_offset, | |
629 | uint64_t offset, | |
630 | bool allocate) | |
5f4da8c0 | 631 | { |
b3976d3c FZ |
632 | /* 128 sectors * 512 bytes each = grain size 64KB */ |
633 | uint8_t whole_grain[extent->cluster_sectors * 512]; | |
5f4da8c0 | 634 | |
0e69c543 FZ |
635 | /* we will be here if it's first write on non-exist grain(cluster). |
636 | * try to read from parent image, if exist */ | |
b171271a | 637 | if (bs->backing_hd) { |
c336500d | 638 | int ret; |
5f4da8c0 | 639 | |
ae261c86 | 640 | if (!vmdk_is_cid_valid(bs)) { |
5f4da8c0 | 641 | return -1; |
ae261c86 | 642 | } |
5f4da8c0 | 643 | |
0e69c543 FZ |
644 | /* floor offset to cluster */ |
645 | offset -= offset % (extent->cluster_sectors * 512); | |
c336500d | 646 | ret = bdrv_read(bs->backing_hd, offset >> 9, whole_grain, |
b3976d3c | 647 | extent->cluster_sectors); |
c336500d KW |
648 | if (ret < 0) { |
649 | return -1; | |
650 | } | |
630530a6 | 651 | |
0e69c543 | 652 | /* Write grain only into the active image */ |
b3976d3c FZ |
653 | ret = bdrv_write(extent->file, cluster_offset, whole_grain, |
654 | extent->cluster_sectors); | |
c336500d KW |
655 | if (ret < 0) { |
656 | return -1; | |
630530a6 TS |
657 | } |
658 | } | |
659 | return 0; | |
660 | } | |
661 | ||
b3976d3c | 662 | static int vmdk_L2update(VmdkExtent *extent, VmdkMetaData *m_data) |
630530a6 | 663 | { |
630530a6 | 664 | /* update L2 table */ |
b3976d3c FZ |
665 | if (bdrv_pwrite_sync( |
666 | extent->file, | |
667 | ((int64_t)m_data->l2_offset * 512) | |
668 | + (m_data->l2_index * sizeof(m_data->offset)), | |
669 | &(m_data->offset), | |
670 | sizeof(m_data->offset) | |
671 | ) < 0) { | |
630530a6 | 672 | return -1; |
b3976d3c | 673 | } |
630530a6 | 674 | /* update backup L2 table */ |
b3976d3c FZ |
675 | if (extent->l1_backup_table_offset != 0) { |
676 | m_data->l2_offset = extent->l1_backup_table[m_data->l1_index]; | |
677 | if (bdrv_pwrite_sync( | |
678 | extent->file, | |
679 | ((int64_t)m_data->l2_offset * 512) | |
680 | + (m_data->l2_index * sizeof(m_data->offset)), | |
681 | &(m_data->offset), sizeof(m_data->offset) | |
682 | ) < 0) { | |
5f4da8c0 | 683 | return -1; |
b3976d3c | 684 | } |
5f4da8c0 | 685 | } |
630530a6 | 686 | |
5f4da8c0 TS |
687 | return 0; |
688 | } | |
689 | ||
91b85bd3 | 690 | static int get_cluster_offset(BlockDriverState *bs, |
b3976d3c FZ |
691 | VmdkExtent *extent, |
692 | VmdkMetaData *m_data, | |
91b85bd3 FZ |
693 | uint64_t offset, |
694 | int allocate, | |
695 | uint64_t *cluster_offset) | |
ea2384d3 | 696 | { |
ea2384d3 FB |
697 | unsigned int l1_index, l2_offset, l2_index; |
698 | int min_index, i, j; | |
630530a6 | 699 | uint32_t min_count, *l2_table, tmp = 0; |
630530a6 | 700 | |
ae261c86 | 701 | if (m_data) { |
630530a6 | 702 | m_data->valid = 0; |
ae261c86 | 703 | } |
91b85bd3 | 704 | if (extent->flat) { |
7fa60fa3 | 705 | *cluster_offset = extent->flat_start_offset; |
91b85bd3 FZ |
706 | return 0; |
707 | } | |
630530a6 | 708 | |
6398de51 | 709 | offset -= (extent->end_sector - extent->sectors) * SECTOR_SIZE; |
b3976d3c FZ |
710 | l1_index = (offset >> 9) / extent->l1_entry_sectors; |
711 | if (l1_index >= extent->l1_size) { | |
91b85bd3 | 712 | return -1; |
b3976d3c FZ |
713 | } |
714 | l2_offset = extent->l1_table[l1_index]; | |
715 | if (!l2_offset) { | |
91b85bd3 | 716 | return -1; |
b3976d3c | 717 | } |
b4b3ab14 | 718 | for (i = 0; i < L2_CACHE_SIZE; i++) { |
b3976d3c | 719 | if (l2_offset == extent->l2_cache_offsets[i]) { |
ea2384d3 | 720 | /* increment the hit count */ |
b3976d3c | 721 | if (++extent->l2_cache_counts[i] == 0xffffffff) { |
b4b3ab14 | 722 | for (j = 0; j < L2_CACHE_SIZE; j++) { |
b3976d3c | 723 | extent->l2_cache_counts[j] >>= 1; |
ea2384d3 FB |
724 | } |
725 | } | |
b3976d3c | 726 | l2_table = extent->l2_cache + (i * extent->l2_size); |
ea2384d3 FB |
727 | goto found; |
728 | } | |
729 | } | |
730 | /* not found: load a new entry in the least used one */ | |
731 | min_index = 0; | |
732 | min_count = 0xffffffff; | |
b4b3ab14 | 733 | for (i = 0; i < L2_CACHE_SIZE; i++) { |
b3976d3c FZ |
734 | if (extent->l2_cache_counts[i] < min_count) { |
735 | min_count = extent->l2_cache_counts[i]; | |
ea2384d3 FB |
736 | min_index = i; |
737 | } | |
738 | } | |
b3976d3c FZ |
739 | l2_table = extent->l2_cache + (min_index * extent->l2_size); |
740 | if (bdrv_pread( | |
741 | extent->file, | |
742 | (int64_t)l2_offset * 512, | |
743 | l2_table, | |
744 | extent->l2_size * sizeof(uint32_t) | |
745 | ) != extent->l2_size * sizeof(uint32_t)) { | |
91b85bd3 | 746 | return -1; |
b3976d3c | 747 | } |
5f4da8c0 | 748 | |
b3976d3c FZ |
749 | extent->l2_cache_offsets[min_index] = l2_offset; |
750 | extent->l2_cache_counts[min_index] = 1; | |
ea2384d3 | 751 | found: |
b3976d3c | 752 | l2_index = ((offset >> 9) / extent->cluster_sectors) % extent->l2_size; |
91b85bd3 | 753 | *cluster_offset = le32_to_cpu(l2_table[l2_index]); |
630530a6 | 754 | |
91b85bd3 FZ |
755 | if (!*cluster_offset) { |
756 | if (!allocate) { | |
757 | return -1; | |
758 | } | |
9949f97e | 759 | |
ae261c86 | 760 | /* Avoid the L2 tables update for the images that have snapshots. */ |
91b85bd3 | 761 | *cluster_offset = bdrv_getlength(extent->file); |
b3976d3c FZ |
762 | bdrv_truncate( |
763 | extent->file, | |
91b85bd3 | 764 | *cluster_offset + (extent->cluster_sectors << 9) |
b3976d3c | 765 | ); |
9949f97e | 766 | |
91b85bd3 FZ |
767 | *cluster_offset >>= 9; |
768 | tmp = cpu_to_le32(*cluster_offset); | |
9949f97e | 769 | l2_table[l2_index] = tmp; |
630530a6 | 770 | |
630530a6 TS |
771 | /* First of all we write grain itself, to avoid race condition |
772 | * that may to corrupt the image. | |
773 | * This problem may occur because of insufficient space on host disk | |
774 | * or inappropriate VM shutdown. | |
775 | */ | |
b3976d3c | 776 | if (get_whole_cluster( |
ae261c86 | 777 | bs, extent, *cluster_offset, offset, allocate) == -1) { |
91b85bd3 | 778 | return -1; |
ae261c86 | 779 | } |
630530a6 TS |
780 | |
781 | if (m_data) { | |
782 | m_data->offset = tmp; | |
783 | m_data->l1_index = l1_index; | |
784 | m_data->l2_index = l2_index; | |
785 | m_data->l2_offset = l2_offset; | |
786 | m_data->valid = 1; | |
787 | } | |
ff1afc72 | 788 | } |
91b85bd3 FZ |
789 | *cluster_offset <<= 9; |
790 | return 0; | |
ea2384d3 FB |
791 | } |
792 | ||
b3976d3c FZ |
793 | static VmdkExtent *find_extent(BDRVVmdkState *s, |
794 | int64_t sector_num, VmdkExtent *start_hint) | |
795 | { | |
796 | VmdkExtent *extent = start_hint; | |
797 | ||
798 | if (!extent) { | |
799 | extent = &s->extents[0]; | |
800 | } | |
801 | while (extent < &s->extents[s->num_extents]) { | |
802 | if (sector_num < extent->end_sector) { | |
803 | return extent; | |
804 | } | |
805 | extent++; | |
806 | } | |
807 | return NULL; | |
808 | } | |
809 | ||
5fafdf24 | 810 | static int vmdk_is_allocated(BlockDriverState *bs, int64_t sector_num, |
ea2384d3 FB |
811 | int nb_sectors, int *pnum) |
812 | { | |
813 | BDRVVmdkState *s = bs->opaque; | |
b3976d3c FZ |
814 | int64_t index_in_cluster, n, ret; |
815 | uint64_t offset; | |
816 | VmdkExtent *extent; | |
817 | ||
818 | extent = find_extent(s, sector_num, NULL); | |
819 | if (!extent) { | |
820 | return 0; | |
821 | } | |
91b85bd3 FZ |
822 | ret = get_cluster_offset(bs, extent, NULL, |
823 | sector_num * 512, 0, &offset); | |
824 | /* get_cluster_offset returning 0 means success */ | |
825 | ret = !ret; | |
826 | ||
827 | index_in_cluster = sector_num % extent->cluster_sectors; | |
828 | n = extent->cluster_sectors - index_in_cluster; | |
ae261c86 | 829 | if (n > nb_sectors) { |
ea2384d3 | 830 | n = nb_sectors; |
ae261c86 | 831 | } |
ea2384d3 | 832 | *pnum = n; |
b3976d3c | 833 | return ret; |
ea2384d3 FB |
834 | } |
835 | ||
5fafdf24 | 836 | static int vmdk_read(BlockDriverState *bs, int64_t sector_num, |
ea2384d3 FB |
837 | uint8_t *buf, int nb_sectors) |
838 | { | |
839 | BDRVVmdkState *s = bs->opaque; | |
b3976d3c FZ |
840 | int ret; |
841 | uint64_t n, index_in_cluster; | |
842 | VmdkExtent *extent = NULL; | |
ea2384d3 | 843 | uint64_t cluster_offset; |
5f4da8c0 | 844 | |
ea2384d3 | 845 | while (nb_sectors > 0) { |
b3976d3c FZ |
846 | extent = find_extent(s, sector_num, extent); |
847 | if (!extent) { | |
848 | return -EIO; | |
849 | } | |
91b85bd3 FZ |
850 | ret = get_cluster_offset( |
851 | bs, extent, NULL, | |
852 | sector_num << 9, 0, &cluster_offset); | |
b3976d3c FZ |
853 | index_in_cluster = sector_num % extent->cluster_sectors; |
854 | n = extent->cluster_sectors - index_in_cluster; | |
ae261c86 | 855 | if (n > nb_sectors) { |
ea2384d3 | 856 | n = nb_sectors; |
ae261c86 | 857 | } |
91b85bd3 FZ |
858 | if (ret) { |
859 | /* if not allocated, try to read from parent image, if exist */ | |
b171271a | 860 | if (bs->backing_hd) { |
ae261c86 | 861 | if (!vmdk_is_cid_valid(bs)) { |
7fa60fa3 | 862 | return -EINVAL; |
ae261c86 | 863 | } |
b171271a | 864 | ret = bdrv_read(bs->backing_hd, sector_num, buf, n); |
ae261c86 | 865 | if (ret < 0) { |
7fa60fa3 | 866 | return ret; |
ae261c86 | 867 | } |
5f4da8c0 TS |
868 | } else { |
869 | memset(buf, 0, 512 * n); | |
870 | } | |
ea2384d3 | 871 | } else { |
7fa60fa3 FZ |
872 | ret = bdrv_pread(extent->file, |
873 | cluster_offset + index_in_cluster * 512, | |
874 | buf, n * 512); | |
875 | if (ret < 0) { | |
876 | return ret; | |
877 | } | |
ea2384d3 FB |
878 | } |
879 | nb_sectors -= n; | |
880 | sector_num += n; | |
881 | buf += n * 512; | |
882 | } | |
883 | return 0; | |
884 | } | |
885 | ||
5fafdf24 | 886 | static int vmdk_write(BlockDriverState *bs, int64_t sector_num, |
ea2384d3 FB |
887 | const uint8_t *buf, int nb_sectors) |
888 | { | |
ff1afc72 | 889 | BDRVVmdkState *s = bs->opaque; |
b3976d3c | 890 | VmdkExtent *extent = NULL; |
91b85bd3 | 891 | int n, ret; |
b3976d3c | 892 | int64_t index_in_cluster; |
ff1afc72 | 893 | uint64_t cluster_offset; |
b3976d3c | 894 | VmdkMetaData m_data; |
ff1afc72 | 895 | |
630530a6 TS |
896 | if (sector_num > bs->total_sectors) { |
897 | fprintf(stderr, | |
92868412 JM |
898 | "(VMDK) Wrong offset: sector_num=0x%" PRIx64 |
899 | " total_sectors=0x%" PRIx64 "\n", | |
630530a6 | 900 | sector_num, bs->total_sectors); |
7fa60fa3 | 901 | return -EIO; |
630530a6 TS |
902 | } |
903 | ||
ff1afc72 | 904 | while (nb_sectors > 0) { |
b3976d3c FZ |
905 | extent = find_extent(s, sector_num, extent); |
906 | if (!extent) { | |
907 | return -EIO; | |
908 | } | |
91b85bd3 | 909 | ret = get_cluster_offset( |
b3976d3c FZ |
910 | bs, |
911 | extent, | |
912 | &m_data, | |
91b85bd3 FZ |
913 | sector_num << 9, 1, |
914 | &cluster_offset); | |
915 | if (ret) { | |
916 | return -EINVAL; | |
b3976d3c FZ |
917 | } |
918 | index_in_cluster = sector_num % extent->cluster_sectors; | |
919 | n = extent->cluster_sectors - index_in_cluster; | |
920 | if (n > nb_sectors) { | |
921 | n = nb_sectors; | |
922 | } | |
630530a6 | 923 | |
7fa60fa3 | 924 | ret = bdrv_pwrite(extent->file, |
b3976d3c | 925 | cluster_offset + index_in_cluster * 512, |
7fa60fa3 FZ |
926 | buf, |
927 | n * 512); | |
928 | if (ret < 0) { | |
929 | return ret; | |
b3976d3c | 930 | } |
630530a6 TS |
931 | if (m_data.valid) { |
932 | /* update L2 tables */ | |
b3976d3c | 933 | if (vmdk_L2update(extent, &m_data) == -1) { |
7fa60fa3 | 934 | return -EIO; |
b3976d3c | 935 | } |
630530a6 | 936 | } |
ff1afc72 FB |
937 | nb_sectors -= n; |
938 | sector_num += n; | |
939 | buf += n * 512; | |
5f4da8c0 | 940 | |
ae261c86 FZ |
941 | /* update CID on the first write every time the virtual disk is |
942 | * opened */ | |
69b4d86d | 943 | if (!s->cid_updated) { |
5f4da8c0 | 944 | vmdk_write_cid(bs, time(NULL)); |
69b4d86d | 945 | s->cid_updated = true; |
5f4da8c0 | 946 | } |
ff1afc72 FB |
947 | } |
948 | return 0; | |
ea2384d3 FB |
949 | } |
950 | ||
f66fd6c3 FZ |
951 | |
952 | static int vmdk_create_extent(const char *filename, int64_t filesize, bool flat) | |
8979b227 | 953 | { |
f66fd6c3 FZ |
954 | int ret, i; |
955 | int fd = 0; | |
8979b227 FB |
956 | VMDK4Header header; |
957 | uint32_t tmp, magic, grains, gd_size, gt_size, gt_count; | |
0e7e1989 | 958 | |
f66fd6c3 FZ |
959 | fd = open( |
960 | filename, | |
961 | O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE, | |
962 | 0644); | |
963 | if (fd < 0) { | |
964 | return -errno; | |
0e7e1989 | 965 | } |
f66fd6c3 FZ |
966 | if (flat) { |
967 | ret = ftruncate(fd, filesize); | |
968 | if (ret < 0) { | |
969 | ret = -errno; | |
970 | } | |
971 | goto exit; | |
5f4da8c0 | 972 | } |
8979b227 FB |
973 | magic = cpu_to_be32(VMDK4_MAGIC); |
974 | memset(&header, 0, sizeof(header)); | |
16372ff0 AG |
975 | header.version = 1; |
976 | header.flags = 3; /* ?? */ | |
f66fd6c3 | 977 | header.capacity = filesize / 512; |
16372ff0 AG |
978 | header.granularity = 128; |
979 | header.num_gtes_per_gte = 512; | |
8979b227 | 980 | |
f66fd6c3 | 981 | grains = (filesize / 512 + header.granularity - 1) / header.granularity; |
8979b227 | 982 | gt_size = ((header.num_gtes_per_gte * sizeof(uint32_t)) + 511) >> 9; |
f66fd6c3 FZ |
983 | gt_count = |
984 | (grains + header.num_gtes_per_gte - 1) / header.num_gtes_per_gte; | |
8979b227 FB |
985 | gd_size = (gt_count * sizeof(uint32_t) + 511) >> 9; |
986 | ||
987 | header.desc_offset = 1; | |
988 | header.desc_size = 20; | |
989 | header.rgd_offset = header.desc_offset + header.desc_size; | |
990 | header.gd_offset = header.rgd_offset + gd_size + (gt_size * gt_count); | |
991 | header.grain_offset = | |
992 | ((header.gd_offset + gd_size + (gt_size * gt_count) + | |
993 | header.granularity - 1) / header.granularity) * | |
994 | header.granularity; | |
16372ff0 AG |
995 | /* swap endianness for all header fields */ |
996 | header.version = cpu_to_le32(header.version); | |
997 | header.flags = cpu_to_le32(header.flags); | |
998 | header.capacity = cpu_to_le64(header.capacity); | |
999 | header.granularity = cpu_to_le64(header.granularity); | |
1000 | header.num_gtes_per_gte = cpu_to_le32(header.num_gtes_per_gte); | |
8979b227 FB |
1001 | header.desc_offset = cpu_to_le64(header.desc_offset); |
1002 | header.desc_size = cpu_to_le64(header.desc_size); | |
1003 | header.rgd_offset = cpu_to_le64(header.rgd_offset); | |
1004 | header.gd_offset = cpu_to_le64(header.gd_offset); | |
1005 | header.grain_offset = cpu_to_le64(header.grain_offset); | |
1006 | ||
1007 | header.check_bytes[0] = 0xa; | |
1008 | header.check_bytes[1] = 0x20; | |
1009 | header.check_bytes[2] = 0xd; | |
1010 | header.check_bytes[3] = 0xa; | |
3b46e624 TS |
1011 | |
1012 | /* write all the data */ | |
1640366c KS |
1013 | ret = qemu_write_full(fd, &magic, sizeof(magic)); |
1014 | if (ret != sizeof(magic)) { | |
b781cce5 | 1015 | ret = -errno; |
1640366c KS |
1016 | goto exit; |
1017 | } | |
1018 | ret = qemu_write_full(fd, &header, sizeof(header)); | |
1019 | if (ret != sizeof(header)) { | |
b781cce5 | 1020 | ret = -errno; |
1640366c KS |
1021 | goto exit; |
1022 | } | |
8979b227 | 1023 | |
16372ff0 | 1024 | ret = ftruncate(fd, le64_to_cpu(header.grain_offset) << 9); |
1640366c | 1025 | if (ret < 0) { |
b781cce5 | 1026 | ret = -errno; |
1640366c KS |
1027 | goto exit; |
1028 | } | |
8979b227 FB |
1029 | |
1030 | /* write grain directory */ | |
1031 | lseek(fd, le64_to_cpu(header.rgd_offset) << 9, SEEK_SET); | |
16372ff0 | 1032 | for (i = 0, tmp = le64_to_cpu(header.rgd_offset) + gd_size; |
1640366c KS |
1033 | i < gt_count; i++, tmp += gt_size) { |
1034 | ret = qemu_write_full(fd, &tmp, sizeof(tmp)); | |
1035 | if (ret != sizeof(tmp)) { | |
b781cce5 | 1036 | ret = -errno; |
1640366c KS |
1037 | goto exit; |
1038 | } | |
1039 | } | |
3b46e624 | 1040 | |
8979b227 FB |
1041 | /* write backup grain directory */ |
1042 | lseek(fd, le64_to_cpu(header.gd_offset) << 9, SEEK_SET); | |
16372ff0 | 1043 | for (i = 0, tmp = le64_to_cpu(header.gd_offset) + gd_size; |
1640366c KS |
1044 | i < gt_count; i++, tmp += gt_size) { |
1045 | ret = qemu_write_full(fd, &tmp, sizeof(tmp)); | |
1046 | if (ret != sizeof(tmp)) { | |
b781cce5 | 1047 | ret = -errno; |
1640366c KS |
1048 | goto exit; |
1049 | } | |
1050 | } | |
8979b227 | 1051 | |
f66fd6c3 FZ |
1052 | ret = 0; |
1053 | exit: | |
1054 | close(fd); | |
1055 | return ret; | |
1056 | } | |
1057 | ||
1058 | static int filename_decompose(const char *filename, char *path, char *prefix, | |
1059 | char *postfix, size_t buf_len) | |
1060 | { | |
1061 | const char *p, *q; | |
1062 | ||
1063 | if (filename == NULL || !strlen(filename)) { | |
1064 | fprintf(stderr, "Vmdk: no filename provided.\n"); | |
1065 | return -1; | |
1066 | } | |
1067 | p = strrchr(filename, '/'); | |
1068 | if (p == NULL) { | |
1069 | p = strrchr(filename, '\\'); | |
1070 | } | |
1071 | if (p == NULL) { | |
1072 | p = strrchr(filename, ':'); | |
1073 | } | |
1074 | if (p != NULL) { | |
1075 | p++; | |
1076 | if (p - filename >= buf_len) { | |
1077 | return -1; | |
1078 | } | |
1079 | pstrcpy(path, p - filename + 1, filename); | |
1080 | } else { | |
1081 | p = filename; | |
1082 | path[0] = '\0'; | |
1083 | } | |
1084 | q = strrchr(p, '.'); | |
1085 | if (q == NULL) { | |
1086 | pstrcpy(prefix, buf_len, p); | |
1087 | postfix[0] = '\0'; | |
1088 | } else { | |
1089 | if (q - p >= buf_len) { | |
1090 | return -1; | |
1091 | } | |
1092 | pstrcpy(prefix, q - p + 1, p); | |
1093 | pstrcpy(postfix, buf_len, q); | |
1094 | } | |
1095 | return 0; | |
1096 | } | |
1097 | ||
1098 | static int relative_path(char *dest, int dest_size, | |
1099 | const char *base, const char *target) | |
1100 | { | |
1101 | int i = 0; | |
1102 | int n = 0; | |
1103 | const char *p, *q; | |
1104 | #ifdef _WIN32 | |
1105 | const char *sep = "\\"; | |
1106 | #else | |
1107 | const char *sep = "/"; | |
1108 | #endif | |
1109 | ||
1110 | if (!(dest && base && target)) { | |
1111 | return -1; | |
1112 | } | |
1113 | if (path_is_absolute(target)) { | |
1114 | dest[dest_size - 1] = '\0'; | |
1115 | strncpy(dest, target, dest_size - 1); | |
1116 | return 0; | |
1117 | } | |
1118 | while (base[i] == target[i]) { | |
1119 | i++; | |
1120 | } | |
1121 | p = &base[i]; | |
1122 | q = &target[i]; | |
1123 | while (*p) { | |
1124 | if (*p == *sep) { | |
1125 | n++; | |
1126 | } | |
1127 | p++; | |
1128 | } | |
1129 | dest[0] = '\0'; | |
1130 | for (; n; n--) { | |
1131 | pstrcat(dest, dest_size, ".."); | |
1132 | pstrcat(dest, dest_size, sep); | |
1133 | } | |
1134 | pstrcat(dest, dest_size, q); | |
1135 | return 0; | |
1136 | } | |
1137 | ||
1138 | static int vmdk_create(const char *filename, QEMUOptionParameter *options) | |
1139 | { | |
1140 | int fd, idx = 0; | |
1141 | char desc[BUF_SIZE]; | |
1142 | int64_t total_size = 0, filesize; | |
1143 | const char *backing_file = NULL; | |
1144 | const char *fmt = NULL; | |
1145 | int flags = 0; | |
1146 | int ret = 0; | |
1147 | bool flat, split; | |
1148 | char ext_desc_lines[BUF_SIZE] = ""; | |
1149 | char path[PATH_MAX], prefix[PATH_MAX], postfix[PATH_MAX]; | |
1150 | const int64_t split_size = 0x80000000; /* VMDK has constant split size */ | |
1151 | const char *desc_extent_line; | |
1152 | char parent_desc_line[BUF_SIZE] = ""; | |
1153 | uint32_t parent_cid = 0xffffffff; | |
1154 | const char desc_template[] = | |
1155 | "# Disk DescriptorFile\n" | |
1156 | "version=1\n" | |
1157 | "CID=%x\n" | |
1158 | "parentCID=%x\n" | |
1159 | "createType=\"%s\"\n" | |
1160 | "%s" | |
1161 | "\n" | |
1162 | "# Extent description\n" | |
1163 | "%s" | |
1164 | "\n" | |
1165 | "# The Disk Data Base\n" | |
1166 | "#DDB\n" | |
1167 | "\n" | |
1168 | "ddb.virtualHWVersion = \"%d\"\n" | |
1169 | "ddb.geometry.cylinders = \"%" PRId64 "\"\n" | |
1170 | "ddb.geometry.heads = \"16\"\n" | |
1171 | "ddb.geometry.sectors = \"63\"\n" | |
1172 | "ddb.adapterType = \"ide\"\n"; | |
1173 | ||
1174 | if (filename_decompose(filename, path, prefix, postfix, PATH_MAX)) { | |
1175 | return -EINVAL; | |
1176 | } | |
1177 | /* Read out options */ | |
1178 | while (options && options->name) { | |
1179 | if (!strcmp(options->name, BLOCK_OPT_SIZE)) { | |
1180 | total_size = options->value.n; | |
1181 | } else if (!strcmp(options->name, BLOCK_OPT_BACKING_FILE)) { | |
1182 | backing_file = options->value.s; | |
1183 | } else if (!strcmp(options->name, BLOCK_OPT_COMPAT6)) { | |
1184 | flags |= options->value.n ? BLOCK_FLAG_COMPAT6 : 0; | |
1185 | } else if (!strcmp(options->name, BLOCK_OPT_SUBFMT)) { | |
1186 | fmt = options->value.s; | |
1187 | } | |
1188 | options++; | |
1189 | } | |
1190 | if (!fmt) { | |
1191 | /* Default format to monolithicSparse */ | |
1192 | fmt = "monolithicSparse"; | |
1193 | } else if (strcmp(fmt, "monolithicFlat") && | |
1194 | strcmp(fmt, "monolithicSparse") && | |
1195 | strcmp(fmt, "twoGbMaxExtentSparse") && | |
1196 | strcmp(fmt, "twoGbMaxExtentFlat")) { | |
1197 | fprintf(stderr, "VMDK: Unknown subformat: %s\n", fmt); | |
1198 | return -EINVAL; | |
1199 | } | |
1200 | split = !(strcmp(fmt, "twoGbMaxExtentFlat") && | |
1201 | strcmp(fmt, "twoGbMaxExtentSparse")); | |
1202 | flat = !(strcmp(fmt, "monolithicFlat") && | |
1203 | strcmp(fmt, "twoGbMaxExtentFlat")); | |
1204 | if (flat) { | |
1205 | desc_extent_line = "RW %lld FLAT \"%s\" 0\n"; | |
1206 | } else { | |
1207 | desc_extent_line = "RW %lld SPARSE \"%s\"\n"; | |
1208 | } | |
1209 | if (flat && backing_file) { | |
1210 | /* not supporting backing file for flat image */ | |
1211 | return -ENOTSUP; | |
1212 | } | |
1213 | if (backing_file) { | |
1214 | char parent_filename[PATH_MAX]; | |
1215 | BlockDriverState *bs = bdrv_new(""); | |
1216 | ret = bdrv_open(bs, backing_file, 0, NULL); | |
1217 | if (ret != 0) { | |
1218 | bdrv_delete(bs); | |
1219 | return ret; | |
1220 | } | |
1221 | if (strcmp(bs->drv->format_name, "vmdk")) { | |
1222 | bdrv_delete(bs); | |
1223 | return -EINVAL; | |
1224 | } | |
1225 | filesize = bdrv_getlength(bs); | |
1226 | parent_cid = vmdk_read_cid(bs, 0); | |
1227 | bdrv_delete(bs); | |
1228 | relative_path(parent_filename, sizeof(parent_filename), | |
1229 | filename, backing_file); | |
1230 | snprintf(parent_desc_line, sizeof(parent_desc_line), | |
1231 | "parentFileNameHint=\"%s\"", parent_filename); | |
1232 | } | |
1233 | ||
1234 | /* Create extents */ | |
1235 | filesize = total_size; | |
1236 | while (filesize > 0) { | |
1237 | char desc_line[BUF_SIZE]; | |
1238 | char ext_filename[PATH_MAX]; | |
1239 | char desc_filename[PATH_MAX]; | |
1240 | int64_t size = filesize; | |
1241 | ||
1242 | if (split && size > split_size) { | |
1243 | size = split_size; | |
1244 | } | |
1245 | if (split) { | |
1246 | snprintf(desc_filename, sizeof(desc_filename), "%s-%c%03d%s", | |
1247 | prefix, flat ? 'f' : 's', ++idx, postfix); | |
1248 | } else if (flat) { | |
1249 | snprintf(desc_filename, sizeof(desc_filename), "%s-flat%s", | |
1250 | prefix, postfix); | |
1251 | } else { | |
1252 | snprintf(desc_filename, sizeof(desc_filename), "%s%s", | |
1253 | prefix, postfix); | |
1254 | } | |
1255 | snprintf(ext_filename, sizeof(ext_filename), "%s%s", | |
1256 | path, desc_filename); | |
1257 | ||
1258 | if (vmdk_create_extent(ext_filename, size, flat)) { | |
1259 | return -EINVAL; | |
1260 | } | |
1261 | filesize -= size; | |
1262 | ||
1263 | /* Format description line */ | |
1264 | snprintf(desc_line, sizeof(desc_line), | |
1265 | desc_extent_line, size / 512, desc_filename); | |
1266 | pstrcat(ext_desc_lines, sizeof(ext_desc_lines), desc_line); | |
1267 | } | |
1268 | /* generate descriptor file */ | |
1269 | snprintf(desc, sizeof(desc), desc_template, | |
1270 | (unsigned int)time(NULL), | |
1271 | parent_cid, | |
1272 | fmt, | |
1273 | parent_desc_line, | |
1274 | ext_desc_lines, | |
1275 | (flags & BLOCK_FLAG_COMPAT6 ? 6 : 4), | |
1276 | total_size / (int64_t)(63 * 16 * 512)); | |
1277 | if (split || flat) { | |
1278 | fd = open( | |
1279 | filename, | |
1280 | O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE, | |
1281 | 0644); | |
1282 | } else { | |
1283 | fd = open( | |
1284 | filename, | |
1285 | O_WRONLY | O_BINARY | O_LARGEFILE, | |
1286 | 0644); | |
1287 | } | |
1288 | if (fd < 0) { | |
1289 | return -errno; | |
1290 | } | |
1291 | /* the descriptor offset = 0x200 */ | |
1292 | if (!split && !flat && 0x200 != lseek(fd, 0x200, SEEK_SET)) { | |
1293 | ret = -errno; | |
1294 | goto exit; | |
1295 | } | |
1640366c KS |
1296 | ret = qemu_write_full(fd, desc, strlen(desc)); |
1297 | if (ret != strlen(desc)) { | |
b781cce5 | 1298 | ret = -errno; |
1640366c KS |
1299 | goto exit; |
1300 | } | |
1640366c KS |
1301 | ret = 0; |
1302 | exit: | |
8979b227 | 1303 | close(fd); |
1640366c | 1304 | return ret; |
8979b227 FB |
1305 | } |
1306 | ||
e2731add | 1307 | static void vmdk_close(BlockDriverState *bs) |
ea2384d3 | 1308 | { |
b3976d3c | 1309 | vmdk_free_extents(bs); |
ea2384d3 FB |
1310 | } |
1311 | ||
205ef796 | 1312 | static int vmdk_flush(BlockDriverState *bs) |
7a6cba61 | 1313 | { |
333c574d FZ |
1314 | int i, ret, err; |
1315 | BDRVVmdkState *s = bs->opaque; | |
1316 | ||
1317 | ret = bdrv_flush(bs->file); | |
1318 | for (i = 0; i < s->num_extents; i++) { | |
1319 | err = bdrv_flush(s->extents[i].file); | |
1320 | if (err < 0) { | |
1321 | ret = err; | |
1322 | } | |
1323 | } | |
1324 | return ret; | |
7a6cba61 PB |
1325 | } |
1326 | ||
4a1d5e1f FZ |
1327 | static int64_t vmdk_get_allocated_file_size(BlockDriverState *bs) |
1328 | { | |
1329 | int i; | |
1330 | int64_t ret = 0; | |
1331 | int64_t r; | |
1332 | BDRVVmdkState *s = bs->opaque; | |
1333 | ||
1334 | ret = bdrv_get_allocated_file_size(bs->file); | |
1335 | if (ret < 0) { | |
1336 | return ret; | |
1337 | } | |
1338 | for (i = 0; i < s->num_extents; i++) { | |
1339 | if (s->extents[i].file == bs->file) { | |
1340 | continue; | |
1341 | } | |
1342 | r = bdrv_get_allocated_file_size(s->extents[i].file); | |
1343 | if (r < 0) { | |
1344 | return r; | |
1345 | } | |
1346 | ret += r; | |
1347 | } | |
1348 | return ret; | |
1349 | } | |
0e7e1989 KW |
1350 | |
1351 | static QEMUOptionParameter vmdk_create_options[] = { | |
db08adf5 KW |
1352 | { |
1353 | .name = BLOCK_OPT_SIZE, | |
1354 | .type = OPT_SIZE, | |
1355 | .help = "Virtual disk size" | |
1356 | }, | |
1357 | { | |
1358 | .name = BLOCK_OPT_BACKING_FILE, | |
1359 | .type = OPT_STRING, | |
1360 | .help = "File name of a base image" | |
1361 | }, | |
1362 | { | |
1363 | .name = BLOCK_OPT_COMPAT6, | |
1364 | .type = OPT_FLAG, | |
1365 | .help = "VMDK version 6 image" | |
1366 | }, | |
f66fd6c3 FZ |
1367 | { |
1368 | .name = BLOCK_OPT_SUBFMT, | |
1369 | .type = OPT_STRING, | |
1370 | .help = | |
1371 | "VMDK flat extent format, can be one of " | |
1372 | "{monolithicSparse (default) | monolithicFlat | twoGbMaxExtentSparse | twoGbMaxExtentFlat} " | |
1373 | }, | |
0e7e1989 KW |
1374 | { NULL } |
1375 | }; | |
1376 | ||
5efa9d5a | 1377 | static BlockDriver bdrv_vmdk = { |
ae261c86 FZ |
1378 | .format_name = "vmdk", |
1379 | .instance_size = sizeof(BDRVVmdkState), | |
1380 | .bdrv_probe = vmdk_probe, | |
6511ef77 | 1381 | .bdrv_open = vmdk_open, |
ae261c86 FZ |
1382 | .bdrv_read = vmdk_read, |
1383 | .bdrv_write = vmdk_write, | |
1384 | .bdrv_close = vmdk_close, | |
1385 | .bdrv_create = vmdk_create, | |
1386 | .bdrv_flush = vmdk_flush, | |
1387 | .bdrv_is_allocated = vmdk_is_allocated, | |
4a1d5e1f | 1388 | .bdrv_get_allocated_file_size = vmdk_get_allocated_file_size, |
0e7e1989 KW |
1389 | |
1390 | .create_options = vmdk_create_options, | |
ea2384d3 | 1391 | }; |
5efa9d5a AL |
1392 | |
1393 | static void bdrv_vmdk_init(void) | |
1394 | { | |
1395 | bdrv_register(&bdrv_vmdk); | |
1396 | } | |
1397 | ||
1398 | block_init(bdrv_vmdk_init); |