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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]; | |
ff1afc72 | 59 | } __attribute__((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 | ||
105 | if (buf_size < 4) | |
106 | return 0; | |
107 | magic = be32_to_cpu(*(uint32_t *)buf); | |
108 | if (magic == VMDK3_MAGIC || | |
01fc99d6 | 109 | magic == VMDK4_MAGIC) { |
ea2384d3 | 110 | return 100; |
01fc99d6 FZ |
111 | } else { |
112 | const char *p = (const char *)buf; | |
113 | const char *end = p + buf_size; | |
114 | while (p < end) { | |
115 | if (*p == '#') { | |
116 | /* skip comment line */ | |
117 | while (p < end && *p != '\n') { | |
118 | p++; | |
119 | } | |
120 | p++; | |
121 | continue; | |
122 | } | |
123 | if (*p == ' ') { | |
124 | while (p < end && *p == ' ') { | |
125 | p++; | |
126 | } | |
127 | /* skip '\r' if windows line endings used. */ | |
128 | if (p < end && *p == '\r') { | |
129 | p++; | |
130 | } | |
131 | /* only accept blank lines before 'version=' line */ | |
132 | if (p == end || *p != '\n') { | |
133 | return 0; | |
134 | } | |
135 | p++; | |
136 | continue; | |
137 | } | |
138 | if (end - p >= strlen("version=X\n")) { | |
139 | if (strncmp("version=1\n", p, strlen("version=1\n")) == 0 || | |
140 | strncmp("version=2\n", p, strlen("version=2\n")) == 0) { | |
141 | return 100; | |
142 | } | |
143 | } | |
144 | if (end - p >= strlen("version=X\r\n")) { | |
145 | if (strncmp("version=1\r\n", p, strlen("version=1\r\n")) == 0 || | |
146 | strncmp("version=2\r\n", p, strlen("version=2\r\n")) == 0) { | |
147 | return 100; | |
148 | } | |
149 | } | |
150 | return 0; | |
151 | } | |
ea2384d3 | 152 | return 0; |
01fc99d6 | 153 | } |
ea2384d3 FB |
154 | } |
155 | ||
5f4da8c0 TS |
156 | #define CHECK_CID 1 |
157 | ||
3b46e624 | 158 | #define SECTOR_SIZE 512 |
f66fd6c3 FZ |
159 | #define DESC_SIZE (20 * SECTOR_SIZE) /* 20 sectors of 512 bytes each */ |
160 | #define BUF_SIZE 4096 | |
161 | #define HEADER_SIZE 512 /* first sector of 512 bytes */ | |
5f4da8c0 | 162 | |
b3976d3c FZ |
163 | static void vmdk_free_extents(BlockDriverState *bs) |
164 | { | |
165 | int i; | |
166 | BDRVVmdkState *s = bs->opaque; | |
167 | ||
168 | for (i = 0; i < s->num_extents; i++) { | |
169 | qemu_free(s->extents[i].l1_table); | |
170 | qemu_free(s->extents[i].l2_cache); | |
171 | qemu_free(s->extents[i].l1_backup_table); | |
172 | } | |
173 | qemu_free(s->extents); | |
174 | } | |
175 | ||
5f4da8c0 | 176 | static uint32_t vmdk_read_cid(BlockDriverState *bs, int parent) |
ea2384d3 | 177 | { |
5f4da8c0 TS |
178 | char desc[DESC_SIZE]; |
179 | uint32_t cid; | |
7ccfb2eb | 180 | const char *p_name, *cid_str; |
5f4da8c0 | 181 | size_t cid_str_size; |
e1da9b24 | 182 | BDRVVmdkState *s = bs->opaque; |
5f4da8c0 | 183 | |
e1da9b24 | 184 | if (bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE) != DESC_SIZE) { |
5f4da8c0 | 185 | return 0; |
e1da9b24 | 186 | } |
5f4da8c0 TS |
187 | |
188 | if (parent) { | |
189 | cid_str = "parentCID"; | |
190 | cid_str_size = sizeof("parentCID"); | |
191 | } else { | |
192 | cid_str = "CID"; | |
193 | cid_str_size = sizeof("CID"); | |
194 | } | |
195 | ||
511d2b14 | 196 | if ((p_name = strstr(desc,cid_str)) != NULL) { |
5f4da8c0 TS |
197 | p_name += cid_str_size; |
198 | sscanf(p_name,"%x",&cid); | |
199 | } | |
200 | ||
201 | return cid; | |
202 | } | |
203 | ||
204 | static int vmdk_write_cid(BlockDriverState *bs, uint32_t cid) | |
205 | { | |
5f4da8c0 TS |
206 | char desc[DESC_SIZE], tmp_desc[DESC_SIZE]; |
207 | char *p_name, *tmp_str; | |
e1da9b24 | 208 | BDRVVmdkState *s = bs->opaque; |
5f4da8c0 | 209 | |
e1da9b24 FZ |
210 | memset(desc, 0, sizeof(desc)); |
211 | if (bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE) != DESC_SIZE) { | |
212 | return -EIO; | |
213 | } | |
5f4da8c0 TS |
214 | |
215 | tmp_str = strstr(desc,"parentCID"); | |
363a37d5 | 216 | pstrcpy(tmp_desc, sizeof(tmp_desc), tmp_str); |
511d2b14 | 217 | if ((p_name = strstr(desc,"CID")) != NULL) { |
5f4da8c0 | 218 | p_name += sizeof("CID"); |
363a37d5 BS |
219 | snprintf(p_name, sizeof(desc) - (p_name - desc), "%x\n", cid); |
220 | pstrcat(desc, sizeof(desc), tmp_desc); | |
5f4da8c0 TS |
221 | } |
222 | ||
e1da9b24 FZ |
223 | if (bdrv_pwrite_sync(bs->file, s->desc_offset, desc, DESC_SIZE) < 0) { |
224 | return -EIO; | |
225 | } | |
5f4da8c0 TS |
226 | return 0; |
227 | } | |
228 | ||
229 | static int vmdk_is_cid_valid(BlockDriverState *bs) | |
230 | { | |
231 | #ifdef CHECK_CID | |
232 | BDRVVmdkState *s = bs->opaque; | |
b171271a | 233 | BlockDriverState *p_bs = bs->backing_hd; |
5f4da8c0 TS |
234 | uint32_t cur_pcid; |
235 | ||
236 | if (p_bs) { | |
237 | cur_pcid = vmdk_read_cid(p_bs,0); | |
238 | if (s->parent_cid != cur_pcid) | |
239 | // CID not valid | |
240 | return 0; | |
241 | } | |
242 | #endif | |
243 | // CID valid | |
244 | return 1; | |
245 | } | |
246 | ||
9949f97e | 247 | static int vmdk_parent_open(BlockDriverState *bs) |
5f4da8c0 | 248 | { |
5fafdf24 | 249 | char *p_name; |
7fa60fa3 | 250 | char desc[DESC_SIZE + 1]; |
e1da9b24 | 251 | BDRVVmdkState *s = bs->opaque; |
5f4da8c0 | 252 | |
7fa60fa3 | 253 | desc[DESC_SIZE] = '\0'; |
e1da9b24 | 254 | if (bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE) != DESC_SIZE) { |
5f4da8c0 | 255 | return -1; |
e1da9b24 | 256 | } |
5f4da8c0 | 257 | |
511d2b14 | 258 | if ((p_name = strstr(desc,"parentFileNameHint")) != NULL) { |
5f4da8c0 | 259 | char *end_name; |
5f4da8c0 TS |
260 | |
261 | p_name += sizeof("parentFileNameHint") + 1; | |
511d2b14 | 262 | if ((end_name = strchr(p_name,'\"')) == NULL) |
5f4da8c0 | 263 | return -1; |
b171271a | 264 | if ((end_name - p_name) > sizeof (bs->backing_file) - 1) |
b34d259a | 265 | return -1; |
3b46e624 | 266 | |
b171271a | 267 | pstrcpy(bs->backing_file, end_name - p_name + 1, p_name); |
ff1afc72 | 268 | } |
5f4da8c0 TS |
269 | |
270 | return 0; | |
271 | } | |
272 | ||
b3976d3c FZ |
273 | /* Create and append extent to the extent array. Return the added VmdkExtent |
274 | * address. return NULL if allocation failed. */ | |
275 | static VmdkExtent *vmdk_add_extent(BlockDriverState *bs, | |
276 | BlockDriverState *file, bool flat, int64_t sectors, | |
277 | int64_t l1_offset, int64_t l1_backup_offset, | |
278 | uint32_t l1_size, | |
279 | int l2_size, unsigned int cluster_sectors) | |
280 | { | |
281 | VmdkExtent *extent; | |
282 | BDRVVmdkState *s = bs->opaque; | |
283 | ||
284 | s->extents = qemu_realloc(s->extents, | |
285 | (s->num_extents + 1) * sizeof(VmdkExtent)); | |
286 | extent = &s->extents[s->num_extents]; | |
287 | s->num_extents++; | |
288 | ||
289 | memset(extent, 0, sizeof(VmdkExtent)); | |
290 | extent->file = file; | |
291 | extent->flat = flat; | |
292 | extent->sectors = sectors; | |
293 | extent->l1_table_offset = l1_offset; | |
294 | extent->l1_backup_table_offset = l1_backup_offset; | |
295 | extent->l1_size = l1_size; | |
296 | extent->l1_entry_sectors = l2_size * cluster_sectors; | |
297 | extent->l2_size = l2_size; | |
298 | extent->cluster_sectors = cluster_sectors; | |
299 | ||
300 | if (s->num_extents > 1) { | |
301 | extent->end_sector = (*(extent - 1)).end_sector + extent->sectors; | |
302 | } else { | |
303 | extent->end_sector = extent->sectors; | |
304 | } | |
305 | bs->total_sectors = extent->end_sector; | |
306 | return extent; | |
307 | } | |
308 | ||
b4b3ab14 | 309 | static int vmdk_init_tables(BlockDriverState *bs, VmdkExtent *extent) |
5f4da8c0 | 310 | { |
b4b3ab14 FZ |
311 | int ret; |
312 | int l1_size, i; | |
5f4da8c0 | 313 | |
ea2384d3 | 314 | /* read the L1 table */ |
b3976d3c FZ |
315 | l1_size = extent->l1_size * sizeof(uint32_t); |
316 | extent->l1_table = qemu_malloc(l1_size); | |
b4b3ab14 FZ |
317 | ret = bdrv_pread(extent->file, |
318 | extent->l1_table_offset, | |
319 | extent->l1_table, | |
320 | l1_size); | |
321 | if (ret < 0) { | |
322 | goto fail_l1; | |
b3976d3c FZ |
323 | } |
324 | for (i = 0; i < extent->l1_size; i++) { | |
325 | le32_to_cpus(&extent->l1_table[i]); | |
ea2384d3 FB |
326 | } |
327 | ||
b3976d3c FZ |
328 | if (extent->l1_backup_table_offset) { |
329 | extent->l1_backup_table = qemu_malloc(l1_size); | |
b4b3ab14 FZ |
330 | ret = bdrv_pread(extent->file, |
331 | extent->l1_backup_table_offset, | |
332 | extent->l1_backup_table, | |
333 | l1_size); | |
334 | if (ret < 0) { | |
335 | goto fail_l1b; | |
b3976d3c FZ |
336 | } |
337 | for (i = 0; i < extent->l1_size; i++) { | |
338 | le32_to_cpus(&extent->l1_backup_table[i]); | |
ff1afc72 FB |
339 | } |
340 | } | |
341 | ||
b3976d3c FZ |
342 | extent->l2_cache = |
343 | qemu_malloc(extent->l2_size * L2_CACHE_SIZE * sizeof(uint32_t)); | |
ea2384d3 | 344 | return 0; |
b4b3ab14 FZ |
345 | fail_l1b: |
346 | qemu_free(extent->l1_backup_table); | |
347 | fail_l1: | |
348 | qemu_free(extent->l1_table); | |
349 | return ret; | |
350 | } | |
351 | ||
352 | static int vmdk_open_vmdk3(BlockDriverState *bs, int flags) | |
353 | { | |
354 | int ret; | |
355 | uint32_t magic; | |
356 | VMDK3Header header; | |
e1da9b24 | 357 | BDRVVmdkState *s = bs->opaque; |
b4b3ab14 FZ |
358 | VmdkExtent *extent; |
359 | ||
e1da9b24 | 360 | s->desc_offset = 0x200; |
b4b3ab14 FZ |
361 | ret = bdrv_pread(bs->file, sizeof(magic), &header, sizeof(header)); |
362 | if (ret < 0) { | |
363 | goto fail; | |
364 | } | |
365 | extent = vmdk_add_extent(bs, | |
366 | bs->file, false, | |
367 | le32_to_cpu(header.disk_sectors), | |
368 | le32_to_cpu(header.l1dir_offset) << 9, | |
369 | 0, 1 << 6, 1 << 9, | |
370 | le32_to_cpu(header.granularity)); | |
371 | ret = vmdk_init_tables(bs, extent); | |
372 | if (ret) { | |
373 | /* vmdk_init_tables cleans up on fail, so only free allocation of | |
374 | * vmdk_add_extent here. */ | |
375 | goto fail; | |
376 | } | |
377 | return 0; | |
ea2384d3 | 378 | fail: |
b3976d3c | 379 | vmdk_free_extents(bs); |
b4b3ab14 FZ |
380 | return ret; |
381 | } | |
382 | ||
383 | static int vmdk_open_vmdk4(BlockDriverState *bs, int flags) | |
384 | { | |
385 | int ret; | |
386 | uint32_t magic; | |
387 | uint32_t l1_size, l1_entry_sectors; | |
388 | VMDK4Header header; | |
389 | BDRVVmdkState *s = bs->opaque; | |
390 | VmdkExtent *extent; | |
391 | ||
e1da9b24 | 392 | s->desc_offset = 0x200; |
b4b3ab14 FZ |
393 | ret = bdrv_pread(bs->file, sizeof(magic), &header, sizeof(header)); |
394 | if (ret < 0) { | |
395 | goto fail; | |
396 | } | |
397 | l1_entry_sectors = le32_to_cpu(header.num_gtes_per_gte) | |
398 | * le64_to_cpu(header.granularity); | |
399 | l1_size = (le64_to_cpu(header.capacity) + l1_entry_sectors - 1) | |
400 | / l1_entry_sectors; | |
401 | extent = vmdk_add_extent(bs, bs->file, false, | |
402 | le64_to_cpu(header.capacity), | |
403 | le64_to_cpu(header.gd_offset) << 9, | |
404 | le64_to_cpu(header.rgd_offset) << 9, | |
405 | l1_size, | |
406 | le32_to_cpu(header.num_gtes_per_gte), | |
407 | le64_to_cpu(header.granularity)); | |
408 | if (extent->l1_entry_sectors <= 0) { | |
409 | ret = -EINVAL; | |
410 | goto fail; | |
411 | } | |
412 | /* try to open parent images, if exist */ | |
413 | ret = vmdk_parent_open(bs); | |
414 | if (ret) { | |
415 | goto fail; | |
416 | } | |
417 | s->parent_cid = vmdk_read_cid(bs, 1); | |
418 | ret = vmdk_init_tables(bs, extent); | |
419 | if (ret) { | |
420 | goto fail; | |
421 | } | |
422 | return 0; | |
423 | fail: | |
424 | vmdk_free_extents(bs); | |
425 | return ret; | |
426 | } | |
427 | ||
7fa60fa3 FZ |
428 | /* find an option value out of descriptor file */ |
429 | static int vmdk_parse_description(const char *desc, const char *opt_name, | |
430 | char *buf, int buf_size) | |
431 | { | |
432 | char *opt_pos, *opt_end; | |
433 | const char *end = desc + strlen(desc); | |
434 | ||
435 | opt_pos = strstr(desc, opt_name); | |
436 | if (!opt_pos) { | |
437 | return -1; | |
438 | } | |
439 | /* Skip "=\"" following opt_name */ | |
440 | opt_pos += strlen(opt_name) + 2; | |
441 | if (opt_pos >= end) { | |
442 | return -1; | |
443 | } | |
444 | opt_end = opt_pos; | |
445 | while (opt_end < end && *opt_end != '"') { | |
446 | opt_end++; | |
447 | } | |
448 | if (opt_end == end || buf_size < opt_end - opt_pos + 1) { | |
449 | return -1; | |
450 | } | |
451 | pstrcpy(buf, opt_end - opt_pos + 1, opt_pos); | |
452 | return 0; | |
453 | } | |
454 | ||
455 | static int vmdk_parse_extents(const char *desc, BlockDriverState *bs, | |
456 | const char *desc_file_path) | |
457 | { | |
458 | int ret; | |
459 | char access[11]; | |
460 | char type[11]; | |
461 | char fname[512]; | |
462 | const char *p = desc; | |
463 | int64_t sectors = 0; | |
464 | int64_t flat_offset; | |
465 | ||
466 | while (*p) { | |
467 | /* parse extent line: | |
468 | * RW [size in sectors] FLAT "file-name.vmdk" OFFSET | |
469 | * or | |
470 | * RW [size in sectors] SPARSE "file-name.vmdk" | |
471 | */ | |
472 | flat_offset = -1; | |
473 | ret = sscanf(p, "%10s %" SCNd64 " %10s %511s %" SCNd64, | |
474 | access, §ors, type, fname, &flat_offset); | |
475 | if (ret < 4 || strcmp(access, "RW")) { | |
476 | goto next_line; | |
477 | } else if (!strcmp(type, "FLAT")) { | |
478 | if (ret != 5 || flat_offset < 0) { | |
479 | return -EINVAL; | |
480 | } | |
481 | } else if (ret != 4) { | |
482 | return -EINVAL; | |
483 | } | |
484 | ||
485 | /* trim the quotation marks around */ | |
486 | if (fname[0] == '"') { | |
487 | memmove(fname, fname + 1, strlen(fname)); | |
488 | if (strlen(fname) <= 1 || fname[strlen(fname) - 1] != '"') { | |
489 | return -EINVAL; | |
490 | } | |
491 | fname[strlen(fname) - 1] = '\0'; | |
492 | } | |
493 | if (sectors <= 0 || | |
494 | (strcmp(type, "FLAT") && strcmp(type, "SPARSE")) || | |
495 | (strcmp(access, "RW"))) { | |
496 | goto next_line; | |
497 | } | |
498 | ||
499 | /* save to extents array */ | |
500 | if (!strcmp(type, "FLAT")) { | |
501 | /* FLAT extent */ | |
502 | char extent_path[PATH_MAX]; | |
503 | BlockDriverState *extent_file; | |
504 | VmdkExtent *extent; | |
505 | ||
506 | path_combine(extent_path, sizeof(extent_path), | |
507 | desc_file_path, fname); | |
508 | ret = bdrv_file_open(&extent_file, extent_path, bs->open_flags); | |
509 | if (ret) { | |
510 | return ret; | |
511 | } | |
512 | extent = vmdk_add_extent(bs, extent_file, true, sectors, | |
513 | 0, 0, 0, 0, sectors); | |
514 | extent->flat_start_offset = flat_offset; | |
515 | } else { | |
516 | /* SPARSE extent, not supported for now */ | |
517 | fprintf(stderr, | |
518 | "VMDK: Not supported extent type \"%s\""".\n", type); | |
519 | return -ENOTSUP; | |
520 | } | |
521 | next_line: | |
522 | /* move to next line */ | |
523 | while (*p && *p != '\n') { | |
524 | p++; | |
525 | } | |
526 | p++; | |
527 | } | |
528 | return 0; | |
529 | } | |
530 | ||
531 | static int vmdk_open_desc_file(BlockDriverState *bs, int flags) | |
532 | { | |
533 | int ret; | |
534 | char buf[2048]; | |
535 | char ct[128]; | |
536 | BDRVVmdkState *s = bs->opaque; | |
537 | ||
538 | ret = bdrv_pread(bs->file, 0, buf, sizeof(buf)); | |
539 | if (ret < 0) { | |
540 | return ret; | |
541 | } | |
542 | buf[2047] = '\0'; | |
543 | if (vmdk_parse_description(buf, "createType", ct, sizeof(ct))) { | |
544 | return -EINVAL; | |
545 | } | |
546 | if (strcmp(ct, "monolithicFlat")) { | |
547 | fprintf(stderr, | |
548 | "VMDK: Not supported image type \"%s\""".\n", ct); | |
549 | return -ENOTSUP; | |
550 | } | |
551 | s->desc_offset = 0; | |
552 | ret = vmdk_parse_extents(buf, bs, bs->file->filename); | |
553 | if (ret) { | |
554 | return ret; | |
555 | } | |
556 | ||
557 | /* try to open parent images, if exist */ | |
558 | if (vmdk_parent_open(bs)) { | |
559 | qemu_free(s->extents); | |
560 | return -EINVAL; | |
561 | } | |
562 | s->parent_cid = vmdk_read_cid(bs, 1); | |
563 | return 0; | |
564 | } | |
565 | ||
b4b3ab14 FZ |
566 | static int vmdk_open(BlockDriverState *bs, int flags) |
567 | { | |
568 | uint32_t magic; | |
569 | ||
570 | if (bdrv_pread(bs->file, 0, &magic, sizeof(magic)) != sizeof(magic)) { | |
571 | return -EIO; | |
572 | } | |
573 | ||
574 | magic = be32_to_cpu(magic); | |
575 | if (magic == VMDK3_MAGIC) { | |
576 | return vmdk_open_vmdk3(bs, flags); | |
577 | } else if (magic == VMDK4_MAGIC) { | |
578 | return vmdk_open_vmdk4(bs, flags); | |
579 | } else { | |
7fa60fa3 | 580 | return vmdk_open_desc_file(bs, flags); |
b4b3ab14 | 581 | } |
ea2384d3 FB |
582 | } |
583 | ||
b3976d3c FZ |
584 | static int get_whole_cluster(BlockDriverState *bs, |
585 | VmdkExtent *extent, | |
586 | uint64_t cluster_offset, | |
587 | uint64_t offset, | |
588 | bool allocate) | |
5f4da8c0 | 589 | { |
b3976d3c FZ |
590 | /* 128 sectors * 512 bytes each = grain size 64KB */ |
591 | uint8_t whole_grain[extent->cluster_sectors * 512]; | |
5f4da8c0 | 592 | |
0e69c543 FZ |
593 | /* we will be here if it's first write on non-exist grain(cluster). |
594 | * try to read from parent image, if exist */ | |
b171271a | 595 | if (bs->backing_hd) { |
c336500d | 596 | int ret; |
5f4da8c0 TS |
597 | |
598 | if (!vmdk_is_cid_valid(bs)) | |
599 | return -1; | |
5f4da8c0 | 600 | |
0e69c543 FZ |
601 | /* floor offset to cluster */ |
602 | offset -= offset % (extent->cluster_sectors * 512); | |
c336500d | 603 | ret = bdrv_read(bs->backing_hd, offset >> 9, whole_grain, |
b3976d3c | 604 | extent->cluster_sectors); |
c336500d KW |
605 | if (ret < 0) { |
606 | return -1; | |
607 | } | |
630530a6 | 608 | |
0e69c543 | 609 | /* Write grain only into the active image */ |
b3976d3c FZ |
610 | ret = bdrv_write(extent->file, cluster_offset, whole_grain, |
611 | extent->cluster_sectors); | |
c336500d KW |
612 | if (ret < 0) { |
613 | return -1; | |
630530a6 TS |
614 | } |
615 | } | |
616 | return 0; | |
617 | } | |
618 | ||
b3976d3c | 619 | static int vmdk_L2update(VmdkExtent *extent, VmdkMetaData *m_data) |
630530a6 | 620 | { |
630530a6 | 621 | /* update L2 table */ |
b3976d3c FZ |
622 | if (bdrv_pwrite_sync( |
623 | extent->file, | |
624 | ((int64_t)m_data->l2_offset * 512) | |
625 | + (m_data->l2_index * sizeof(m_data->offset)), | |
626 | &(m_data->offset), | |
627 | sizeof(m_data->offset) | |
628 | ) < 0) { | |
630530a6 | 629 | return -1; |
b3976d3c | 630 | } |
630530a6 | 631 | /* update backup L2 table */ |
b3976d3c FZ |
632 | if (extent->l1_backup_table_offset != 0) { |
633 | m_data->l2_offset = extent->l1_backup_table[m_data->l1_index]; | |
634 | if (bdrv_pwrite_sync( | |
635 | extent->file, | |
636 | ((int64_t)m_data->l2_offset * 512) | |
637 | + (m_data->l2_index * sizeof(m_data->offset)), | |
638 | &(m_data->offset), sizeof(m_data->offset) | |
639 | ) < 0) { | |
5f4da8c0 | 640 | return -1; |
b3976d3c | 641 | } |
5f4da8c0 | 642 | } |
630530a6 | 643 | |
5f4da8c0 TS |
644 | return 0; |
645 | } | |
646 | ||
91b85bd3 | 647 | static int get_cluster_offset(BlockDriverState *bs, |
b3976d3c FZ |
648 | VmdkExtent *extent, |
649 | VmdkMetaData *m_data, | |
91b85bd3 FZ |
650 | uint64_t offset, |
651 | int allocate, | |
652 | uint64_t *cluster_offset) | |
ea2384d3 | 653 | { |
ea2384d3 FB |
654 | unsigned int l1_index, l2_offset, l2_index; |
655 | int min_index, i, j; | |
630530a6 | 656 | uint32_t min_count, *l2_table, tmp = 0; |
630530a6 TS |
657 | |
658 | if (m_data) | |
659 | m_data->valid = 0; | |
91b85bd3 | 660 | if (extent->flat) { |
7fa60fa3 | 661 | *cluster_offset = extent->flat_start_offset; |
91b85bd3 FZ |
662 | return 0; |
663 | } | |
630530a6 | 664 | |
b3976d3c FZ |
665 | l1_index = (offset >> 9) / extent->l1_entry_sectors; |
666 | if (l1_index >= extent->l1_size) { | |
91b85bd3 | 667 | return -1; |
b3976d3c FZ |
668 | } |
669 | l2_offset = extent->l1_table[l1_index]; | |
670 | if (!l2_offset) { | |
91b85bd3 | 671 | return -1; |
b3976d3c | 672 | } |
b4b3ab14 | 673 | for (i = 0; i < L2_CACHE_SIZE; i++) { |
b3976d3c | 674 | if (l2_offset == extent->l2_cache_offsets[i]) { |
ea2384d3 | 675 | /* increment the hit count */ |
b3976d3c | 676 | if (++extent->l2_cache_counts[i] == 0xffffffff) { |
b4b3ab14 | 677 | for (j = 0; j < L2_CACHE_SIZE; j++) { |
b3976d3c | 678 | extent->l2_cache_counts[j] >>= 1; |
ea2384d3 FB |
679 | } |
680 | } | |
b3976d3c | 681 | l2_table = extent->l2_cache + (i * extent->l2_size); |
ea2384d3 FB |
682 | goto found; |
683 | } | |
684 | } | |
685 | /* not found: load a new entry in the least used one */ | |
686 | min_index = 0; | |
687 | min_count = 0xffffffff; | |
b4b3ab14 | 688 | for (i = 0; i < L2_CACHE_SIZE; i++) { |
b3976d3c FZ |
689 | if (extent->l2_cache_counts[i] < min_count) { |
690 | min_count = extent->l2_cache_counts[i]; | |
ea2384d3 FB |
691 | min_index = i; |
692 | } | |
693 | } | |
b3976d3c FZ |
694 | l2_table = extent->l2_cache + (min_index * extent->l2_size); |
695 | if (bdrv_pread( | |
696 | extent->file, | |
697 | (int64_t)l2_offset * 512, | |
698 | l2_table, | |
699 | extent->l2_size * sizeof(uint32_t) | |
700 | ) != extent->l2_size * sizeof(uint32_t)) { | |
91b85bd3 | 701 | return -1; |
b3976d3c | 702 | } |
5f4da8c0 | 703 | |
b3976d3c FZ |
704 | extent->l2_cache_offsets[min_index] = l2_offset; |
705 | extent->l2_cache_counts[min_index] = 1; | |
ea2384d3 | 706 | found: |
b3976d3c | 707 | l2_index = ((offset >> 9) / extent->cluster_sectors) % extent->l2_size; |
91b85bd3 | 708 | *cluster_offset = le32_to_cpu(l2_table[l2_index]); |
630530a6 | 709 | |
91b85bd3 FZ |
710 | if (!*cluster_offset) { |
711 | if (!allocate) { | |
712 | return -1; | |
713 | } | |
9949f97e | 714 | |
630530a6 | 715 | // Avoid the L2 tables update for the images that have snapshots. |
91b85bd3 | 716 | *cluster_offset = bdrv_getlength(extent->file); |
b3976d3c FZ |
717 | bdrv_truncate( |
718 | extent->file, | |
91b85bd3 | 719 | *cluster_offset + (extent->cluster_sectors << 9) |
b3976d3c | 720 | ); |
9949f97e | 721 | |
91b85bd3 FZ |
722 | *cluster_offset >>= 9; |
723 | tmp = cpu_to_le32(*cluster_offset); | |
9949f97e | 724 | l2_table[l2_index] = tmp; |
630530a6 | 725 | |
630530a6 TS |
726 | /* First of all we write grain itself, to avoid race condition |
727 | * that may to corrupt the image. | |
728 | * This problem may occur because of insufficient space on host disk | |
729 | * or inappropriate VM shutdown. | |
730 | */ | |
b3976d3c | 731 | if (get_whole_cluster( |
91b85bd3 FZ |
732 | bs, extent, *cluster_offset, offset, allocate) == -1) |
733 | return -1; | |
630530a6 TS |
734 | |
735 | if (m_data) { | |
736 | m_data->offset = tmp; | |
737 | m_data->l1_index = l1_index; | |
738 | m_data->l2_index = l2_index; | |
739 | m_data->l2_offset = l2_offset; | |
740 | m_data->valid = 1; | |
741 | } | |
ff1afc72 | 742 | } |
91b85bd3 FZ |
743 | *cluster_offset <<= 9; |
744 | return 0; | |
ea2384d3 FB |
745 | } |
746 | ||
b3976d3c FZ |
747 | static VmdkExtent *find_extent(BDRVVmdkState *s, |
748 | int64_t sector_num, VmdkExtent *start_hint) | |
749 | { | |
750 | VmdkExtent *extent = start_hint; | |
751 | ||
752 | if (!extent) { | |
753 | extent = &s->extents[0]; | |
754 | } | |
755 | while (extent < &s->extents[s->num_extents]) { | |
756 | if (sector_num < extent->end_sector) { | |
757 | return extent; | |
758 | } | |
759 | extent++; | |
760 | } | |
761 | return NULL; | |
762 | } | |
763 | ||
5fafdf24 | 764 | static int vmdk_is_allocated(BlockDriverState *bs, int64_t sector_num, |
ea2384d3 FB |
765 | int nb_sectors, int *pnum) |
766 | { | |
767 | BDRVVmdkState *s = bs->opaque; | |
b3976d3c FZ |
768 | int64_t index_in_cluster, n, ret; |
769 | uint64_t offset; | |
770 | VmdkExtent *extent; | |
771 | ||
772 | extent = find_extent(s, sector_num, NULL); | |
773 | if (!extent) { | |
774 | return 0; | |
775 | } | |
91b85bd3 FZ |
776 | ret = get_cluster_offset(bs, extent, NULL, |
777 | sector_num * 512, 0, &offset); | |
778 | /* get_cluster_offset returning 0 means success */ | |
779 | ret = !ret; | |
780 | ||
781 | index_in_cluster = sector_num % extent->cluster_sectors; | |
782 | n = extent->cluster_sectors - index_in_cluster; | |
ea2384d3 FB |
783 | if (n > nb_sectors) |
784 | n = nb_sectors; | |
785 | *pnum = n; | |
b3976d3c | 786 | return ret; |
ea2384d3 FB |
787 | } |
788 | ||
5fafdf24 | 789 | static int vmdk_read(BlockDriverState *bs, int64_t sector_num, |
ea2384d3 FB |
790 | uint8_t *buf, int nb_sectors) |
791 | { | |
792 | BDRVVmdkState *s = bs->opaque; | |
b3976d3c FZ |
793 | int ret; |
794 | uint64_t n, index_in_cluster; | |
795 | VmdkExtent *extent = NULL; | |
ea2384d3 | 796 | uint64_t cluster_offset; |
5f4da8c0 | 797 | |
ea2384d3 | 798 | while (nb_sectors > 0) { |
b3976d3c FZ |
799 | extent = find_extent(s, sector_num, extent); |
800 | if (!extent) { | |
801 | return -EIO; | |
802 | } | |
91b85bd3 FZ |
803 | ret = get_cluster_offset( |
804 | bs, extent, NULL, | |
805 | sector_num << 9, 0, &cluster_offset); | |
b3976d3c FZ |
806 | index_in_cluster = sector_num % extent->cluster_sectors; |
807 | n = extent->cluster_sectors - index_in_cluster; | |
ea2384d3 FB |
808 | if (n > nb_sectors) |
809 | n = nb_sectors; | |
91b85bd3 FZ |
810 | if (ret) { |
811 | /* if not allocated, try to read from parent image, if exist */ | |
b171271a | 812 | if (bs->backing_hd) { |
5f4da8c0 | 813 | if (!vmdk_is_cid_valid(bs)) |
7fa60fa3 | 814 | return -EINVAL; |
b171271a | 815 | ret = bdrv_read(bs->backing_hd, sector_num, buf, n); |
5f4da8c0 | 816 | if (ret < 0) |
7fa60fa3 | 817 | return ret; |
5f4da8c0 TS |
818 | } else { |
819 | memset(buf, 0, 512 * n); | |
820 | } | |
ea2384d3 | 821 | } else { |
7fa60fa3 FZ |
822 | ret = bdrv_pread(extent->file, |
823 | cluster_offset + index_in_cluster * 512, | |
824 | buf, n * 512); | |
825 | if (ret < 0) { | |
826 | return ret; | |
827 | } | |
ea2384d3 FB |
828 | } |
829 | nb_sectors -= n; | |
830 | sector_num += n; | |
831 | buf += n * 512; | |
832 | } | |
833 | return 0; | |
834 | } | |
835 | ||
5fafdf24 | 836 | static int vmdk_write(BlockDriverState *bs, int64_t sector_num, |
ea2384d3 FB |
837 | const uint8_t *buf, int nb_sectors) |
838 | { | |
ff1afc72 | 839 | BDRVVmdkState *s = bs->opaque; |
b3976d3c | 840 | VmdkExtent *extent = NULL; |
91b85bd3 | 841 | int n, ret; |
b3976d3c | 842 | int64_t index_in_cluster; |
ff1afc72 | 843 | uint64_t cluster_offset; |
b3976d3c | 844 | VmdkMetaData m_data; |
ff1afc72 | 845 | |
630530a6 TS |
846 | if (sector_num > bs->total_sectors) { |
847 | fprintf(stderr, | |
92868412 JM |
848 | "(VMDK) Wrong offset: sector_num=0x%" PRIx64 |
849 | " total_sectors=0x%" PRIx64 "\n", | |
630530a6 | 850 | sector_num, bs->total_sectors); |
7fa60fa3 | 851 | return -EIO; |
630530a6 TS |
852 | } |
853 | ||
ff1afc72 | 854 | while (nb_sectors > 0) { |
b3976d3c FZ |
855 | extent = find_extent(s, sector_num, extent); |
856 | if (!extent) { | |
857 | return -EIO; | |
858 | } | |
91b85bd3 | 859 | ret = get_cluster_offset( |
b3976d3c FZ |
860 | bs, |
861 | extent, | |
862 | &m_data, | |
91b85bd3 FZ |
863 | sector_num << 9, 1, |
864 | &cluster_offset); | |
865 | if (ret) { | |
866 | return -EINVAL; | |
b3976d3c FZ |
867 | } |
868 | index_in_cluster = sector_num % extent->cluster_sectors; | |
869 | n = extent->cluster_sectors - index_in_cluster; | |
870 | if (n > nb_sectors) { | |
871 | n = nb_sectors; | |
872 | } | |
630530a6 | 873 | |
7fa60fa3 | 874 | ret = bdrv_pwrite(extent->file, |
b3976d3c | 875 | cluster_offset + index_in_cluster * 512, |
7fa60fa3 FZ |
876 | buf, |
877 | n * 512); | |
878 | if (ret < 0) { | |
879 | return ret; | |
b3976d3c | 880 | } |
630530a6 TS |
881 | if (m_data.valid) { |
882 | /* update L2 tables */ | |
b3976d3c | 883 | if (vmdk_L2update(extent, &m_data) == -1) { |
7fa60fa3 | 884 | return -EIO; |
b3976d3c | 885 | } |
630530a6 | 886 | } |
ff1afc72 FB |
887 | nb_sectors -= n; |
888 | sector_num += n; | |
889 | buf += n * 512; | |
5f4da8c0 TS |
890 | |
891 | // update CID on the first write every time the virtual disk is opened | |
69b4d86d | 892 | if (!s->cid_updated) { |
5f4da8c0 | 893 | vmdk_write_cid(bs, time(NULL)); |
69b4d86d | 894 | s->cid_updated = true; |
5f4da8c0 | 895 | } |
ff1afc72 FB |
896 | } |
897 | return 0; | |
ea2384d3 FB |
898 | } |
899 | ||
f66fd6c3 FZ |
900 | |
901 | static int vmdk_create_extent(const char *filename, int64_t filesize, bool flat) | |
8979b227 | 902 | { |
f66fd6c3 FZ |
903 | int ret, i; |
904 | int fd = 0; | |
8979b227 FB |
905 | VMDK4Header header; |
906 | uint32_t tmp, magic, grains, gd_size, gt_size, gt_count; | |
0e7e1989 | 907 | |
f66fd6c3 FZ |
908 | fd = open( |
909 | filename, | |
910 | O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE, | |
911 | 0644); | |
912 | if (fd < 0) { | |
913 | return -errno; | |
0e7e1989 | 914 | } |
f66fd6c3 FZ |
915 | if (flat) { |
916 | ret = ftruncate(fd, filesize); | |
917 | if (ret < 0) { | |
918 | ret = -errno; | |
919 | } | |
920 | goto exit; | |
5f4da8c0 | 921 | } |
8979b227 FB |
922 | magic = cpu_to_be32(VMDK4_MAGIC); |
923 | memset(&header, 0, sizeof(header)); | |
16372ff0 AG |
924 | header.version = 1; |
925 | header.flags = 3; /* ?? */ | |
f66fd6c3 | 926 | header.capacity = filesize / 512; |
16372ff0 AG |
927 | header.granularity = 128; |
928 | header.num_gtes_per_gte = 512; | |
8979b227 | 929 | |
f66fd6c3 | 930 | grains = (filesize / 512 + header.granularity - 1) / header.granularity; |
8979b227 | 931 | gt_size = ((header.num_gtes_per_gte * sizeof(uint32_t)) + 511) >> 9; |
f66fd6c3 FZ |
932 | gt_count = |
933 | (grains + header.num_gtes_per_gte - 1) / header.num_gtes_per_gte; | |
8979b227 FB |
934 | gd_size = (gt_count * sizeof(uint32_t) + 511) >> 9; |
935 | ||
936 | header.desc_offset = 1; | |
937 | header.desc_size = 20; | |
938 | header.rgd_offset = header.desc_offset + header.desc_size; | |
939 | header.gd_offset = header.rgd_offset + gd_size + (gt_size * gt_count); | |
940 | header.grain_offset = | |
941 | ((header.gd_offset + gd_size + (gt_size * gt_count) + | |
942 | header.granularity - 1) / header.granularity) * | |
943 | header.granularity; | |
16372ff0 AG |
944 | /* swap endianness for all header fields */ |
945 | header.version = cpu_to_le32(header.version); | |
946 | header.flags = cpu_to_le32(header.flags); | |
947 | header.capacity = cpu_to_le64(header.capacity); | |
948 | header.granularity = cpu_to_le64(header.granularity); | |
949 | header.num_gtes_per_gte = cpu_to_le32(header.num_gtes_per_gte); | |
8979b227 FB |
950 | header.desc_offset = cpu_to_le64(header.desc_offset); |
951 | header.desc_size = cpu_to_le64(header.desc_size); | |
952 | header.rgd_offset = cpu_to_le64(header.rgd_offset); | |
953 | header.gd_offset = cpu_to_le64(header.gd_offset); | |
954 | header.grain_offset = cpu_to_le64(header.grain_offset); | |
955 | ||
956 | header.check_bytes[0] = 0xa; | |
957 | header.check_bytes[1] = 0x20; | |
958 | header.check_bytes[2] = 0xd; | |
959 | header.check_bytes[3] = 0xa; | |
3b46e624 TS |
960 | |
961 | /* write all the data */ | |
1640366c KS |
962 | ret = qemu_write_full(fd, &magic, sizeof(magic)); |
963 | if (ret != sizeof(magic)) { | |
b781cce5 | 964 | ret = -errno; |
1640366c KS |
965 | goto exit; |
966 | } | |
967 | ret = qemu_write_full(fd, &header, sizeof(header)); | |
968 | if (ret != sizeof(header)) { | |
b781cce5 | 969 | ret = -errno; |
1640366c KS |
970 | goto exit; |
971 | } | |
8979b227 | 972 | |
16372ff0 | 973 | ret = ftruncate(fd, le64_to_cpu(header.grain_offset) << 9); |
1640366c | 974 | if (ret < 0) { |
b781cce5 | 975 | ret = -errno; |
1640366c KS |
976 | goto exit; |
977 | } | |
8979b227 FB |
978 | |
979 | /* write grain directory */ | |
980 | lseek(fd, le64_to_cpu(header.rgd_offset) << 9, SEEK_SET); | |
16372ff0 | 981 | for (i = 0, tmp = le64_to_cpu(header.rgd_offset) + gd_size; |
1640366c KS |
982 | i < gt_count; i++, tmp += gt_size) { |
983 | ret = qemu_write_full(fd, &tmp, sizeof(tmp)); | |
984 | if (ret != sizeof(tmp)) { | |
b781cce5 | 985 | ret = -errno; |
1640366c KS |
986 | goto exit; |
987 | } | |
988 | } | |
3b46e624 | 989 | |
8979b227 FB |
990 | /* write backup grain directory */ |
991 | lseek(fd, le64_to_cpu(header.gd_offset) << 9, SEEK_SET); | |
16372ff0 | 992 | for (i = 0, tmp = le64_to_cpu(header.gd_offset) + gd_size; |
1640366c KS |
993 | i < gt_count; i++, tmp += gt_size) { |
994 | ret = qemu_write_full(fd, &tmp, sizeof(tmp)); | |
995 | if (ret != sizeof(tmp)) { | |
b781cce5 | 996 | ret = -errno; |
1640366c KS |
997 | goto exit; |
998 | } | |
999 | } | |
8979b227 | 1000 | |
f66fd6c3 FZ |
1001 | ret = 0; |
1002 | exit: | |
1003 | close(fd); | |
1004 | return ret; | |
1005 | } | |
1006 | ||
1007 | static int filename_decompose(const char *filename, char *path, char *prefix, | |
1008 | char *postfix, size_t buf_len) | |
1009 | { | |
1010 | const char *p, *q; | |
1011 | ||
1012 | if (filename == NULL || !strlen(filename)) { | |
1013 | fprintf(stderr, "Vmdk: no filename provided.\n"); | |
1014 | return -1; | |
1015 | } | |
1016 | p = strrchr(filename, '/'); | |
1017 | if (p == NULL) { | |
1018 | p = strrchr(filename, '\\'); | |
1019 | } | |
1020 | if (p == NULL) { | |
1021 | p = strrchr(filename, ':'); | |
1022 | } | |
1023 | if (p != NULL) { | |
1024 | p++; | |
1025 | if (p - filename >= buf_len) { | |
1026 | return -1; | |
1027 | } | |
1028 | pstrcpy(path, p - filename + 1, filename); | |
1029 | } else { | |
1030 | p = filename; | |
1031 | path[0] = '\0'; | |
1032 | } | |
1033 | q = strrchr(p, '.'); | |
1034 | if (q == NULL) { | |
1035 | pstrcpy(prefix, buf_len, p); | |
1036 | postfix[0] = '\0'; | |
1037 | } else { | |
1038 | if (q - p >= buf_len) { | |
1039 | return -1; | |
1040 | } | |
1041 | pstrcpy(prefix, q - p + 1, p); | |
1042 | pstrcpy(postfix, buf_len, q); | |
1043 | } | |
1044 | return 0; | |
1045 | } | |
1046 | ||
1047 | static int relative_path(char *dest, int dest_size, | |
1048 | const char *base, const char *target) | |
1049 | { | |
1050 | int i = 0; | |
1051 | int n = 0; | |
1052 | const char *p, *q; | |
1053 | #ifdef _WIN32 | |
1054 | const char *sep = "\\"; | |
1055 | #else | |
1056 | const char *sep = "/"; | |
1057 | #endif | |
1058 | ||
1059 | if (!(dest && base && target)) { | |
1060 | return -1; | |
1061 | } | |
1062 | if (path_is_absolute(target)) { | |
1063 | dest[dest_size - 1] = '\0'; | |
1064 | strncpy(dest, target, dest_size - 1); | |
1065 | return 0; | |
1066 | } | |
1067 | while (base[i] == target[i]) { | |
1068 | i++; | |
1069 | } | |
1070 | p = &base[i]; | |
1071 | q = &target[i]; | |
1072 | while (*p) { | |
1073 | if (*p == *sep) { | |
1074 | n++; | |
1075 | } | |
1076 | p++; | |
1077 | } | |
1078 | dest[0] = '\0'; | |
1079 | for (; n; n--) { | |
1080 | pstrcat(dest, dest_size, ".."); | |
1081 | pstrcat(dest, dest_size, sep); | |
1082 | } | |
1083 | pstrcat(dest, dest_size, q); | |
1084 | return 0; | |
1085 | } | |
1086 | ||
1087 | static int vmdk_create(const char *filename, QEMUOptionParameter *options) | |
1088 | { | |
1089 | int fd, idx = 0; | |
1090 | char desc[BUF_SIZE]; | |
1091 | int64_t total_size = 0, filesize; | |
1092 | const char *backing_file = NULL; | |
1093 | const char *fmt = NULL; | |
1094 | int flags = 0; | |
1095 | int ret = 0; | |
1096 | bool flat, split; | |
1097 | char ext_desc_lines[BUF_SIZE] = ""; | |
1098 | char path[PATH_MAX], prefix[PATH_MAX], postfix[PATH_MAX]; | |
1099 | const int64_t split_size = 0x80000000; /* VMDK has constant split size */ | |
1100 | const char *desc_extent_line; | |
1101 | char parent_desc_line[BUF_SIZE] = ""; | |
1102 | uint32_t parent_cid = 0xffffffff; | |
1103 | const char desc_template[] = | |
1104 | "# Disk DescriptorFile\n" | |
1105 | "version=1\n" | |
1106 | "CID=%x\n" | |
1107 | "parentCID=%x\n" | |
1108 | "createType=\"%s\"\n" | |
1109 | "%s" | |
1110 | "\n" | |
1111 | "# Extent description\n" | |
1112 | "%s" | |
1113 | "\n" | |
1114 | "# The Disk Data Base\n" | |
1115 | "#DDB\n" | |
1116 | "\n" | |
1117 | "ddb.virtualHWVersion = \"%d\"\n" | |
1118 | "ddb.geometry.cylinders = \"%" PRId64 "\"\n" | |
1119 | "ddb.geometry.heads = \"16\"\n" | |
1120 | "ddb.geometry.sectors = \"63\"\n" | |
1121 | "ddb.adapterType = \"ide\"\n"; | |
1122 | ||
1123 | if (filename_decompose(filename, path, prefix, postfix, PATH_MAX)) { | |
1124 | return -EINVAL; | |
1125 | } | |
1126 | /* Read out options */ | |
1127 | while (options && options->name) { | |
1128 | if (!strcmp(options->name, BLOCK_OPT_SIZE)) { | |
1129 | total_size = options->value.n; | |
1130 | } else if (!strcmp(options->name, BLOCK_OPT_BACKING_FILE)) { | |
1131 | backing_file = options->value.s; | |
1132 | } else if (!strcmp(options->name, BLOCK_OPT_COMPAT6)) { | |
1133 | flags |= options->value.n ? BLOCK_FLAG_COMPAT6 : 0; | |
1134 | } else if (!strcmp(options->name, BLOCK_OPT_SUBFMT)) { | |
1135 | fmt = options->value.s; | |
1136 | } | |
1137 | options++; | |
1138 | } | |
1139 | if (!fmt) { | |
1140 | /* Default format to monolithicSparse */ | |
1141 | fmt = "monolithicSparse"; | |
1142 | } else if (strcmp(fmt, "monolithicFlat") && | |
1143 | strcmp(fmt, "monolithicSparse") && | |
1144 | strcmp(fmt, "twoGbMaxExtentSparse") && | |
1145 | strcmp(fmt, "twoGbMaxExtentFlat")) { | |
1146 | fprintf(stderr, "VMDK: Unknown subformat: %s\n", fmt); | |
1147 | return -EINVAL; | |
1148 | } | |
1149 | split = !(strcmp(fmt, "twoGbMaxExtentFlat") && | |
1150 | strcmp(fmt, "twoGbMaxExtentSparse")); | |
1151 | flat = !(strcmp(fmt, "monolithicFlat") && | |
1152 | strcmp(fmt, "twoGbMaxExtentFlat")); | |
1153 | if (flat) { | |
1154 | desc_extent_line = "RW %lld FLAT \"%s\" 0\n"; | |
1155 | } else { | |
1156 | desc_extent_line = "RW %lld SPARSE \"%s\"\n"; | |
1157 | } | |
1158 | if (flat && backing_file) { | |
1159 | /* not supporting backing file for flat image */ | |
1160 | return -ENOTSUP; | |
1161 | } | |
1162 | if (backing_file) { | |
1163 | char parent_filename[PATH_MAX]; | |
1164 | BlockDriverState *bs = bdrv_new(""); | |
1165 | ret = bdrv_open(bs, backing_file, 0, NULL); | |
1166 | if (ret != 0) { | |
1167 | bdrv_delete(bs); | |
1168 | return ret; | |
1169 | } | |
1170 | if (strcmp(bs->drv->format_name, "vmdk")) { | |
1171 | bdrv_delete(bs); | |
1172 | return -EINVAL; | |
1173 | } | |
1174 | filesize = bdrv_getlength(bs); | |
1175 | parent_cid = vmdk_read_cid(bs, 0); | |
1176 | bdrv_delete(bs); | |
1177 | relative_path(parent_filename, sizeof(parent_filename), | |
1178 | filename, backing_file); | |
1179 | snprintf(parent_desc_line, sizeof(parent_desc_line), | |
1180 | "parentFileNameHint=\"%s\"", parent_filename); | |
1181 | } | |
1182 | ||
1183 | /* Create extents */ | |
1184 | filesize = total_size; | |
1185 | while (filesize > 0) { | |
1186 | char desc_line[BUF_SIZE]; | |
1187 | char ext_filename[PATH_MAX]; | |
1188 | char desc_filename[PATH_MAX]; | |
1189 | int64_t size = filesize; | |
1190 | ||
1191 | if (split && size > split_size) { | |
1192 | size = split_size; | |
1193 | } | |
1194 | if (split) { | |
1195 | snprintf(desc_filename, sizeof(desc_filename), "%s-%c%03d%s", | |
1196 | prefix, flat ? 'f' : 's', ++idx, postfix); | |
1197 | } else if (flat) { | |
1198 | snprintf(desc_filename, sizeof(desc_filename), "%s-flat%s", | |
1199 | prefix, postfix); | |
1200 | } else { | |
1201 | snprintf(desc_filename, sizeof(desc_filename), "%s%s", | |
1202 | prefix, postfix); | |
1203 | } | |
1204 | snprintf(ext_filename, sizeof(ext_filename), "%s%s", | |
1205 | path, desc_filename); | |
1206 | ||
1207 | if (vmdk_create_extent(ext_filename, size, flat)) { | |
1208 | return -EINVAL; | |
1209 | } | |
1210 | filesize -= size; | |
1211 | ||
1212 | /* Format description line */ | |
1213 | snprintf(desc_line, sizeof(desc_line), | |
1214 | desc_extent_line, size / 512, desc_filename); | |
1215 | pstrcat(ext_desc_lines, sizeof(ext_desc_lines), desc_line); | |
1216 | } | |
1217 | /* generate descriptor file */ | |
1218 | snprintf(desc, sizeof(desc), desc_template, | |
1219 | (unsigned int)time(NULL), | |
1220 | parent_cid, | |
1221 | fmt, | |
1222 | parent_desc_line, | |
1223 | ext_desc_lines, | |
1224 | (flags & BLOCK_FLAG_COMPAT6 ? 6 : 4), | |
1225 | total_size / (int64_t)(63 * 16 * 512)); | |
1226 | if (split || flat) { | |
1227 | fd = open( | |
1228 | filename, | |
1229 | O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE, | |
1230 | 0644); | |
1231 | } else { | |
1232 | fd = open( | |
1233 | filename, | |
1234 | O_WRONLY | O_BINARY | O_LARGEFILE, | |
1235 | 0644); | |
1236 | } | |
1237 | if (fd < 0) { | |
1238 | return -errno; | |
1239 | } | |
1240 | /* the descriptor offset = 0x200 */ | |
1241 | if (!split && !flat && 0x200 != lseek(fd, 0x200, SEEK_SET)) { | |
1242 | ret = -errno; | |
1243 | goto exit; | |
1244 | } | |
1640366c KS |
1245 | ret = qemu_write_full(fd, desc, strlen(desc)); |
1246 | if (ret != strlen(desc)) { | |
b781cce5 | 1247 | ret = -errno; |
1640366c KS |
1248 | goto exit; |
1249 | } | |
1640366c KS |
1250 | ret = 0; |
1251 | exit: | |
8979b227 | 1252 | close(fd); |
1640366c | 1253 | return ret; |
8979b227 FB |
1254 | } |
1255 | ||
e2731add | 1256 | static void vmdk_close(BlockDriverState *bs) |
ea2384d3 | 1257 | { |
b3976d3c | 1258 | vmdk_free_extents(bs); |
ea2384d3 FB |
1259 | } |
1260 | ||
205ef796 | 1261 | static int vmdk_flush(BlockDriverState *bs) |
7a6cba61 | 1262 | { |
333c574d FZ |
1263 | int i, ret, err; |
1264 | BDRVVmdkState *s = bs->opaque; | |
1265 | ||
1266 | ret = bdrv_flush(bs->file); | |
1267 | for (i = 0; i < s->num_extents; i++) { | |
1268 | err = bdrv_flush(s->extents[i].file); | |
1269 | if (err < 0) { | |
1270 | ret = err; | |
1271 | } | |
1272 | } | |
1273 | return ret; | |
7a6cba61 PB |
1274 | } |
1275 | ||
0e7e1989 KW |
1276 | |
1277 | static QEMUOptionParameter vmdk_create_options[] = { | |
db08adf5 KW |
1278 | { |
1279 | .name = BLOCK_OPT_SIZE, | |
1280 | .type = OPT_SIZE, | |
1281 | .help = "Virtual disk size" | |
1282 | }, | |
1283 | { | |
1284 | .name = BLOCK_OPT_BACKING_FILE, | |
1285 | .type = OPT_STRING, | |
1286 | .help = "File name of a base image" | |
1287 | }, | |
1288 | { | |
1289 | .name = BLOCK_OPT_COMPAT6, | |
1290 | .type = OPT_FLAG, | |
1291 | .help = "VMDK version 6 image" | |
1292 | }, | |
f66fd6c3 FZ |
1293 | { |
1294 | .name = BLOCK_OPT_SUBFMT, | |
1295 | .type = OPT_STRING, | |
1296 | .help = | |
1297 | "VMDK flat extent format, can be one of " | |
1298 | "{monolithicSparse (default) | monolithicFlat | twoGbMaxExtentSparse | twoGbMaxExtentFlat} " | |
1299 | }, | |
0e7e1989 KW |
1300 | { NULL } |
1301 | }; | |
1302 | ||
5efa9d5a | 1303 | static BlockDriver bdrv_vmdk = { |
e60f469c AJ |
1304 | .format_name = "vmdk", |
1305 | .instance_size = sizeof(BDRVVmdkState), | |
1306 | .bdrv_probe = vmdk_probe, | |
6511ef77 | 1307 | .bdrv_open = vmdk_open, |
e60f469c AJ |
1308 | .bdrv_read = vmdk_read, |
1309 | .bdrv_write = vmdk_write, | |
1310 | .bdrv_close = vmdk_close, | |
1311 | .bdrv_create = vmdk_create, | |
1312 | .bdrv_flush = vmdk_flush, | |
1313 | .bdrv_is_allocated = vmdk_is_allocated, | |
0e7e1989 KW |
1314 | |
1315 | .create_options = vmdk_create_options, | |
ea2384d3 | 1316 | }; |
5efa9d5a AL |
1317 | |
1318 | static void bdrv_vmdk_init(void) | |
1319 | { | |
1320 | bdrv_register(&bdrv_vmdk); | |
1321 | } | |
1322 | ||
1323 | block_init(bdrv_vmdk_init); |