]>
Commit | Line | Data |
---|---|---|
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; | |
ea2384d3 | 68 | int64_t l1_table_offset; |
ff1afc72 | 69 | int64_t l1_backup_table_offset; |
ea2384d3 | 70 | uint32_t *l1_table; |
ff1afc72 | 71 | uint32_t *l1_backup_table; |
ea2384d3 FB |
72 | unsigned int l1_size; |
73 | uint32_t l1_entry_sectors; | |
74 | ||
75 | unsigned int l2_size; | |
76 | uint32_t *l2_cache; | |
77 | uint32_t l2_cache_offsets[L2_CACHE_SIZE]; | |
78 | uint32_t l2_cache_counts[L2_CACHE_SIZE]; | |
79 | ||
80 | unsigned int cluster_sectors; | |
b3976d3c FZ |
81 | } VmdkExtent; |
82 | ||
83 | typedef struct BDRVVmdkState { | |
5f4da8c0 | 84 | uint32_t parent_cid; |
b3976d3c FZ |
85 | int num_extents; |
86 | /* Extent array with num_extents entries, ascend ordered by address */ | |
87 | VmdkExtent *extents; | |
ea2384d3 FB |
88 | } BDRVVmdkState; |
89 | ||
630530a6 TS |
90 | typedef struct VmdkMetaData { |
91 | uint32_t offset; | |
92 | unsigned int l1_index; | |
93 | unsigned int l2_index; | |
94 | unsigned int l2_offset; | |
95 | int valid; | |
96 | } VmdkMetaData; | |
97 | ||
ea2384d3 FB |
98 | static int vmdk_probe(const uint8_t *buf, int buf_size, const char *filename) |
99 | { | |
100 | uint32_t magic; | |
101 | ||
102 | if (buf_size < 4) | |
103 | return 0; | |
104 | magic = be32_to_cpu(*(uint32_t *)buf); | |
105 | if (magic == VMDK3_MAGIC || | |
01fc99d6 | 106 | magic == VMDK4_MAGIC) { |
ea2384d3 | 107 | return 100; |
01fc99d6 FZ |
108 | } else { |
109 | const char *p = (const char *)buf; | |
110 | const char *end = p + buf_size; | |
111 | while (p < end) { | |
112 | if (*p == '#') { | |
113 | /* skip comment line */ | |
114 | while (p < end && *p != '\n') { | |
115 | p++; | |
116 | } | |
117 | p++; | |
118 | continue; | |
119 | } | |
120 | if (*p == ' ') { | |
121 | while (p < end && *p == ' ') { | |
122 | p++; | |
123 | } | |
124 | /* skip '\r' if windows line endings used. */ | |
125 | if (p < end && *p == '\r') { | |
126 | p++; | |
127 | } | |
128 | /* only accept blank lines before 'version=' line */ | |
129 | if (p == end || *p != '\n') { | |
130 | return 0; | |
131 | } | |
132 | p++; | |
133 | continue; | |
134 | } | |
135 | if (end - p >= strlen("version=X\n")) { | |
136 | if (strncmp("version=1\n", p, strlen("version=1\n")) == 0 || | |
137 | strncmp("version=2\n", p, strlen("version=2\n")) == 0) { | |
138 | return 100; | |
139 | } | |
140 | } | |
141 | if (end - p >= strlen("version=X\r\n")) { | |
142 | if (strncmp("version=1\r\n", p, strlen("version=1\r\n")) == 0 || | |
143 | strncmp("version=2\r\n", p, strlen("version=2\r\n")) == 0) { | |
144 | return 100; | |
145 | } | |
146 | } | |
147 | return 0; | |
148 | } | |
ea2384d3 | 149 | return 0; |
01fc99d6 | 150 | } |
ea2384d3 FB |
151 | } |
152 | ||
5f4da8c0 TS |
153 | #define CHECK_CID 1 |
154 | ||
3b46e624 | 155 | #define SECTOR_SIZE 512 |
5f4da8c0 | 156 | #define DESC_SIZE 20*SECTOR_SIZE // 20 sectors of 512 bytes each |
5fafdf24 | 157 | #define HEADER_SIZE 512 // first sector of 512 bytes |
5f4da8c0 | 158 | |
b3976d3c FZ |
159 | static void vmdk_free_extents(BlockDriverState *bs) |
160 | { | |
161 | int i; | |
162 | BDRVVmdkState *s = bs->opaque; | |
163 | ||
164 | for (i = 0; i < s->num_extents; i++) { | |
165 | qemu_free(s->extents[i].l1_table); | |
166 | qemu_free(s->extents[i].l2_cache); | |
167 | qemu_free(s->extents[i].l1_backup_table); | |
168 | } | |
169 | qemu_free(s->extents); | |
170 | } | |
171 | ||
5f4da8c0 | 172 | static uint32_t vmdk_read_cid(BlockDriverState *bs, int parent) |
ea2384d3 | 173 | { |
5f4da8c0 TS |
174 | char desc[DESC_SIZE]; |
175 | uint32_t cid; | |
7ccfb2eb | 176 | const char *p_name, *cid_str; |
5f4da8c0 TS |
177 | size_t cid_str_size; |
178 | ||
179 | /* the descriptor offset = 0x200 */ | |
6511ef77 | 180 | if (bdrv_pread(bs->file, 0x200, desc, DESC_SIZE) != DESC_SIZE) |
5f4da8c0 TS |
181 | return 0; |
182 | ||
183 | if (parent) { | |
184 | cid_str = "parentCID"; | |
185 | cid_str_size = sizeof("parentCID"); | |
186 | } else { | |
187 | cid_str = "CID"; | |
188 | cid_str_size = sizeof("CID"); | |
189 | } | |
190 | ||
511d2b14 | 191 | if ((p_name = strstr(desc,cid_str)) != NULL) { |
5f4da8c0 TS |
192 | p_name += cid_str_size; |
193 | sscanf(p_name,"%x",&cid); | |
194 | } | |
195 | ||
196 | return cid; | |
197 | } | |
198 | ||
199 | static int vmdk_write_cid(BlockDriverState *bs, uint32_t cid) | |
200 | { | |
5f4da8c0 TS |
201 | char desc[DESC_SIZE], tmp_desc[DESC_SIZE]; |
202 | char *p_name, *tmp_str; | |
203 | ||
204 | /* the descriptor offset = 0x200 */ | |
6511ef77 | 205 | if (bdrv_pread(bs->file, 0x200, desc, DESC_SIZE) != DESC_SIZE) |
5f4da8c0 TS |
206 | return -1; |
207 | ||
208 | tmp_str = strstr(desc,"parentCID"); | |
363a37d5 | 209 | pstrcpy(tmp_desc, sizeof(tmp_desc), tmp_str); |
511d2b14 | 210 | if ((p_name = strstr(desc,"CID")) != NULL) { |
5f4da8c0 | 211 | p_name += sizeof("CID"); |
363a37d5 BS |
212 | snprintf(p_name, sizeof(desc) - (p_name - desc), "%x\n", cid); |
213 | pstrcat(desc, sizeof(desc), tmp_desc); | |
5f4da8c0 TS |
214 | } |
215 | ||
b8852e87 | 216 | if (bdrv_pwrite_sync(bs->file, 0x200, desc, DESC_SIZE) < 0) |
5f4da8c0 TS |
217 | return -1; |
218 | return 0; | |
219 | } | |
220 | ||
221 | static int vmdk_is_cid_valid(BlockDriverState *bs) | |
222 | { | |
223 | #ifdef CHECK_CID | |
224 | BDRVVmdkState *s = bs->opaque; | |
b171271a | 225 | BlockDriverState *p_bs = bs->backing_hd; |
5f4da8c0 TS |
226 | uint32_t cur_pcid; |
227 | ||
228 | if (p_bs) { | |
229 | cur_pcid = vmdk_read_cid(p_bs,0); | |
230 | if (s->parent_cid != cur_pcid) | |
231 | // CID not valid | |
232 | return 0; | |
233 | } | |
234 | #endif | |
235 | // CID valid | |
236 | return 1; | |
237 | } | |
238 | ||
239 | static int vmdk_snapshot_create(const char *filename, const char *backing_file) | |
240 | { | |
241 | int snp_fd, p_fd; | |
53c2e716 | 242 | int ret; |
5f4da8c0 | 243 | uint32_t p_cid; |
5fafdf24 | 244 | char *p_name, *gd_buf, *rgd_buf; |
5f4da8c0 TS |
245 | const char *real_filename, *temp_str; |
246 | VMDK4Header header; | |
247 | uint32_t gde_entries, gd_size; | |
248 | int64_t gd_offset, rgd_offset, capacity, gt_size; | |
249 | char p_desc[DESC_SIZE], s_desc[DESC_SIZE], hdr[HEADER_SIZE]; | |
7ccfb2eb | 250 | static const char desc_template[] = |
5f4da8c0 TS |
251 | "# Disk DescriptorFile\n" |
252 | "version=1\n" | |
253 | "CID=%x\n" | |
254 | "parentCID=%x\n" | |
255 | "createType=\"monolithicSparse\"\n" | |
256 | "parentFileNameHint=\"%s\"\n" | |
257 | "\n" | |
258 | "# Extent description\n" | |
7ccfb2eb | 259 | "RW %u SPARSE \"%s\"\n" |
5f4da8c0 TS |
260 | "\n" |
261 | "# The Disk Data Base \n" | |
262 | "#DDB\n" | |
263 | "\n"; | |
264 | ||
265 | snp_fd = open(filename, O_RDWR | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE, 0644); | |
266 | if (snp_fd < 0) | |
53c2e716 | 267 | return -errno; |
5f4da8c0 TS |
268 | p_fd = open(backing_file, O_RDONLY | O_BINARY | O_LARGEFILE); |
269 | if (p_fd < 0) { | |
270 | close(snp_fd); | |
53c2e716 | 271 | return -errno; |
5f4da8c0 TS |
272 | } |
273 | ||
274 | /* read the header */ | |
53c2e716 JQ |
275 | if (lseek(p_fd, 0x0, SEEK_SET) == -1) { |
276 | ret = -errno; | |
5f4da8c0 | 277 | goto fail; |
53c2e716 JQ |
278 | } |
279 | if (read(p_fd, hdr, HEADER_SIZE) != HEADER_SIZE) { | |
280 | ret = -errno; | |
5f4da8c0 | 281 | goto fail; |
53c2e716 | 282 | } |
5f4da8c0 TS |
283 | |
284 | /* write the header */ | |
53c2e716 JQ |
285 | if (lseek(snp_fd, 0x0, SEEK_SET) == -1) { |
286 | ret = -errno; | |
5f4da8c0 | 287 | goto fail; |
53c2e716 JQ |
288 | } |
289 | if (write(snp_fd, hdr, HEADER_SIZE) == -1) { | |
290 | ret = -errno; | |
5f4da8c0 | 291 | goto fail; |
53c2e716 | 292 | } |
5f4da8c0 TS |
293 | |
294 | memset(&header, 0, sizeof(header)); | |
295 | memcpy(&header,&hdr[4], sizeof(header)); // skip the VMDK4_MAGIC | |
296 | ||
53c2e716 JQ |
297 | if (ftruncate(snp_fd, header.grain_offset << 9)) { |
298 | ret = -errno; | |
1640366c | 299 | goto fail; |
53c2e716 | 300 | } |
5f4da8c0 | 301 | /* the descriptor offset = 0x200 */ |
53c2e716 JQ |
302 | if (lseek(p_fd, 0x200, SEEK_SET) == -1) { |
303 | ret = -errno; | |
5f4da8c0 | 304 | goto fail; |
53c2e716 JQ |
305 | } |
306 | if (read(p_fd, p_desc, DESC_SIZE) != DESC_SIZE) { | |
307 | ret = -errno; | |
5f4da8c0 | 308 | goto fail; |
53c2e716 | 309 | } |
5f4da8c0 | 310 | |
511d2b14 | 311 | if ((p_name = strstr(p_desc,"CID")) != NULL) { |
5f4da8c0 TS |
312 | p_name += sizeof("CID"); |
313 | sscanf(p_name,"%x",&p_cid); | |
314 | } | |
315 | ||
316 | real_filename = filename; | |
317 | if ((temp_str = strrchr(real_filename, '\\')) != NULL) | |
318 | real_filename = temp_str + 1; | |
319 | if ((temp_str = strrchr(real_filename, '/')) != NULL) | |
320 | real_filename = temp_str + 1; | |
321 | if ((temp_str = strrchr(real_filename, ':')) != NULL) | |
322 | real_filename = temp_str + 1; | |
323 | ||
363a37d5 BS |
324 | snprintf(s_desc, sizeof(s_desc), desc_template, p_cid, p_cid, backing_file, |
325 | (uint32_t)header.capacity, real_filename); | |
5f4da8c0 TS |
326 | |
327 | /* write the descriptor */ | |
53c2e716 JQ |
328 | if (lseek(snp_fd, 0x200, SEEK_SET) == -1) { |
329 | ret = -errno; | |
5f4da8c0 | 330 | goto fail; |
53c2e716 JQ |
331 | } |
332 | if (write(snp_fd, s_desc, strlen(s_desc)) == -1) { | |
333 | ret = -errno; | |
5f4da8c0 | 334 | goto fail; |
53c2e716 | 335 | } |
ea2384d3 | 336 | |
5f4da8c0 TS |
337 | gd_offset = header.gd_offset * SECTOR_SIZE; // offset of GD table |
338 | rgd_offset = header.rgd_offset * SECTOR_SIZE; // offset of RGD table | |
339 | capacity = header.capacity * SECTOR_SIZE; // Extent size | |
340 | /* | |
341 | * Each GDE span 32M disk, means: | |
342 | * 512 GTE per GT, each GTE points to grain | |
343 | */ | |
344 | gt_size = (int64_t)header.num_gtes_per_gte * header.granularity * SECTOR_SIZE; | |
53c2e716 JQ |
345 | if (!gt_size) { |
346 | ret = -EINVAL; | |
5f4da8c0 | 347 | goto fail; |
53c2e716 | 348 | } |
5fafdf24 | 349 | gde_entries = (uint32_t)(capacity / gt_size); // number of gde/rgde |
5f4da8c0 TS |
350 | gd_size = gde_entries * sizeof(uint32_t); |
351 | ||
352 | /* write RGD */ | |
353 | rgd_buf = qemu_malloc(gd_size); | |
53c2e716 JQ |
354 | if (lseek(p_fd, rgd_offset, SEEK_SET) == -1) { |
355 | ret = -errno; | |
5f4da8c0 | 356 | goto fail_rgd; |
53c2e716 JQ |
357 | } |
358 | if (read(p_fd, rgd_buf, gd_size) != gd_size) { | |
359 | ret = -errno; | |
5f4da8c0 | 360 | goto fail_rgd; |
53c2e716 JQ |
361 | } |
362 | if (lseek(snp_fd, rgd_offset, SEEK_SET) == -1) { | |
363 | ret = -errno; | |
5f4da8c0 | 364 | goto fail_rgd; |
53c2e716 JQ |
365 | } |
366 | if (write(snp_fd, rgd_buf, gd_size) == -1) { | |
367 | ret = -errno; | |
5f4da8c0 | 368 | goto fail_rgd; |
53c2e716 | 369 | } |
5f4da8c0 TS |
370 | |
371 | /* write GD */ | |
372 | gd_buf = qemu_malloc(gd_size); | |
53c2e716 JQ |
373 | if (lseek(p_fd, gd_offset, SEEK_SET) == -1) { |
374 | ret = -errno; | |
5f4da8c0 | 375 | goto fail_gd; |
53c2e716 JQ |
376 | } |
377 | if (read(p_fd, gd_buf, gd_size) != gd_size) { | |
378 | ret = -errno; | |
5f4da8c0 | 379 | goto fail_gd; |
53c2e716 JQ |
380 | } |
381 | if (lseek(snp_fd, gd_offset, SEEK_SET) == -1) { | |
382 | ret = -errno; | |
5f4da8c0 | 383 | goto fail_gd; |
53c2e716 JQ |
384 | } |
385 | if (write(snp_fd, gd_buf, gd_size) == -1) { | |
386 | ret = -errno; | |
5f4da8c0 | 387 | goto fail_gd; |
53c2e716 | 388 | } |
3829cb46 | 389 | ret = 0; |
5f4da8c0 | 390 | |
3829cb46 | 391 | fail_gd: |
5f4da8c0 | 392 | qemu_free(gd_buf); |
3829cb46 | 393 | fail_rgd: |
5f4da8c0 | 394 | qemu_free(rgd_buf); |
3829cb46 | 395 | fail: |
5f4da8c0 TS |
396 | close(p_fd); |
397 | close(snp_fd); | |
53c2e716 | 398 | return ret; |
5f4da8c0 TS |
399 | } |
400 | ||
9949f97e | 401 | static int vmdk_parent_open(BlockDriverState *bs) |
5f4da8c0 | 402 | { |
5fafdf24 | 403 | char *p_name; |
5f4da8c0 | 404 | char desc[DESC_SIZE]; |
5f4da8c0 TS |
405 | |
406 | /* the descriptor offset = 0x200 */ | |
6511ef77 | 407 | if (bdrv_pread(bs->file, 0x200, desc, DESC_SIZE) != DESC_SIZE) |
5f4da8c0 TS |
408 | return -1; |
409 | ||
511d2b14 | 410 | if ((p_name = strstr(desc,"parentFileNameHint")) != NULL) { |
5f4da8c0 | 411 | char *end_name; |
5f4da8c0 TS |
412 | |
413 | p_name += sizeof("parentFileNameHint") + 1; | |
511d2b14 | 414 | if ((end_name = strchr(p_name,'\"')) == NULL) |
5f4da8c0 | 415 | return -1; |
b171271a | 416 | if ((end_name - p_name) > sizeof (bs->backing_file) - 1) |
b34d259a | 417 | return -1; |
3b46e624 | 418 | |
b171271a | 419 | pstrcpy(bs->backing_file, end_name - p_name + 1, p_name); |
ff1afc72 | 420 | } |
5f4da8c0 TS |
421 | |
422 | return 0; | |
423 | } | |
424 | ||
b3976d3c FZ |
425 | /* Create and append extent to the extent array. Return the added VmdkExtent |
426 | * address. return NULL if allocation failed. */ | |
427 | static VmdkExtent *vmdk_add_extent(BlockDriverState *bs, | |
428 | BlockDriverState *file, bool flat, int64_t sectors, | |
429 | int64_t l1_offset, int64_t l1_backup_offset, | |
430 | uint32_t l1_size, | |
431 | int l2_size, unsigned int cluster_sectors) | |
432 | { | |
433 | VmdkExtent *extent; | |
434 | BDRVVmdkState *s = bs->opaque; | |
435 | ||
436 | s->extents = qemu_realloc(s->extents, | |
437 | (s->num_extents + 1) * sizeof(VmdkExtent)); | |
438 | extent = &s->extents[s->num_extents]; | |
439 | s->num_extents++; | |
440 | ||
441 | memset(extent, 0, sizeof(VmdkExtent)); | |
442 | extent->file = file; | |
443 | extent->flat = flat; | |
444 | extent->sectors = sectors; | |
445 | extent->l1_table_offset = l1_offset; | |
446 | extent->l1_backup_table_offset = l1_backup_offset; | |
447 | extent->l1_size = l1_size; | |
448 | extent->l1_entry_sectors = l2_size * cluster_sectors; | |
449 | extent->l2_size = l2_size; | |
450 | extent->cluster_sectors = cluster_sectors; | |
451 | ||
452 | if (s->num_extents > 1) { | |
453 | extent->end_sector = (*(extent - 1)).end_sector + extent->sectors; | |
454 | } else { | |
455 | extent->end_sector = extent->sectors; | |
456 | } | |
457 | bs->total_sectors = extent->end_sector; | |
458 | return extent; | |
459 | } | |
460 | ||
b4b3ab14 | 461 | static int vmdk_init_tables(BlockDriverState *bs, VmdkExtent *extent) |
5f4da8c0 | 462 | { |
b4b3ab14 FZ |
463 | int ret; |
464 | int l1_size, i; | |
5f4da8c0 | 465 | |
ea2384d3 | 466 | /* read the L1 table */ |
b3976d3c FZ |
467 | l1_size = extent->l1_size * sizeof(uint32_t); |
468 | extent->l1_table = qemu_malloc(l1_size); | |
b4b3ab14 FZ |
469 | ret = bdrv_pread(extent->file, |
470 | extent->l1_table_offset, | |
471 | extent->l1_table, | |
472 | l1_size); | |
473 | if (ret < 0) { | |
474 | goto fail_l1; | |
b3976d3c FZ |
475 | } |
476 | for (i = 0; i < extent->l1_size; i++) { | |
477 | le32_to_cpus(&extent->l1_table[i]); | |
ea2384d3 FB |
478 | } |
479 | ||
b3976d3c FZ |
480 | if (extent->l1_backup_table_offset) { |
481 | extent->l1_backup_table = qemu_malloc(l1_size); | |
b4b3ab14 FZ |
482 | ret = bdrv_pread(extent->file, |
483 | extent->l1_backup_table_offset, | |
484 | extent->l1_backup_table, | |
485 | l1_size); | |
486 | if (ret < 0) { | |
487 | goto fail_l1b; | |
b3976d3c FZ |
488 | } |
489 | for (i = 0; i < extent->l1_size; i++) { | |
490 | le32_to_cpus(&extent->l1_backup_table[i]); | |
ff1afc72 FB |
491 | } |
492 | } | |
493 | ||
b3976d3c FZ |
494 | extent->l2_cache = |
495 | qemu_malloc(extent->l2_size * L2_CACHE_SIZE * sizeof(uint32_t)); | |
ea2384d3 | 496 | return 0; |
b4b3ab14 FZ |
497 | fail_l1b: |
498 | qemu_free(extent->l1_backup_table); | |
499 | fail_l1: | |
500 | qemu_free(extent->l1_table); | |
501 | return ret; | |
502 | } | |
503 | ||
504 | static int vmdk_open_vmdk3(BlockDriverState *bs, int flags) | |
505 | { | |
506 | int ret; | |
507 | uint32_t magic; | |
508 | VMDK3Header header; | |
509 | VmdkExtent *extent; | |
510 | ||
511 | ret = bdrv_pread(bs->file, sizeof(magic), &header, sizeof(header)); | |
512 | if (ret < 0) { | |
513 | goto fail; | |
514 | } | |
515 | extent = vmdk_add_extent(bs, | |
516 | bs->file, false, | |
517 | le32_to_cpu(header.disk_sectors), | |
518 | le32_to_cpu(header.l1dir_offset) << 9, | |
519 | 0, 1 << 6, 1 << 9, | |
520 | le32_to_cpu(header.granularity)); | |
521 | ret = vmdk_init_tables(bs, extent); | |
522 | if (ret) { | |
523 | /* vmdk_init_tables cleans up on fail, so only free allocation of | |
524 | * vmdk_add_extent here. */ | |
525 | goto fail; | |
526 | } | |
527 | return 0; | |
ea2384d3 | 528 | fail: |
b3976d3c | 529 | vmdk_free_extents(bs); |
b4b3ab14 FZ |
530 | return ret; |
531 | } | |
532 | ||
533 | static int vmdk_open_vmdk4(BlockDriverState *bs, int flags) | |
534 | { | |
535 | int ret; | |
536 | uint32_t magic; | |
537 | uint32_t l1_size, l1_entry_sectors; | |
538 | VMDK4Header header; | |
539 | BDRVVmdkState *s = bs->opaque; | |
540 | VmdkExtent *extent; | |
541 | ||
542 | ret = bdrv_pread(bs->file, sizeof(magic), &header, sizeof(header)); | |
543 | if (ret < 0) { | |
544 | goto fail; | |
545 | } | |
546 | l1_entry_sectors = le32_to_cpu(header.num_gtes_per_gte) | |
547 | * le64_to_cpu(header.granularity); | |
548 | l1_size = (le64_to_cpu(header.capacity) + l1_entry_sectors - 1) | |
549 | / l1_entry_sectors; | |
550 | extent = vmdk_add_extent(bs, bs->file, false, | |
551 | le64_to_cpu(header.capacity), | |
552 | le64_to_cpu(header.gd_offset) << 9, | |
553 | le64_to_cpu(header.rgd_offset) << 9, | |
554 | l1_size, | |
555 | le32_to_cpu(header.num_gtes_per_gte), | |
556 | le64_to_cpu(header.granularity)); | |
557 | if (extent->l1_entry_sectors <= 0) { | |
558 | ret = -EINVAL; | |
559 | goto fail; | |
560 | } | |
561 | /* try to open parent images, if exist */ | |
562 | ret = vmdk_parent_open(bs); | |
563 | if (ret) { | |
564 | goto fail; | |
565 | } | |
566 | s->parent_cid = vmdk_read_cid(bs, 1); | |
567 | ret = vmdk_init_tables(bs, extent); | |
568 | if (ret) { | |
569 | goto fail; | |
570 | } | |
571 | return 0; | |
572 | fail: | |
573 | vmdk_free_extents(bs); | |
574 | return ret; | |
575 | } | |
576 | ||
577 | static int vmdk_open(BlockDriverState *bs, int flags) | |
578 | { | |
579 | uint32_t magic; | |
580 | ||
581 | if (bdrv_pread(bs->file, 0, &magic, sizeof(magic)) != sizeof(magic)) { | |
582 | return -EIO; | |
583 | } | |
584 | ||
585 | magic = be32_to_cpu(magic); | |
586 | if (magic == VMDK3_MAGIC) { | |
587 | return vmdk_open_vmdk3(bs, flags); | |
588 | } else if (magic == VMDK4_MAGIC) { | |
589 | return vmdk_open_vmdk4(bs, flags); | |
590 | } else { | |
591 | return -EINVAL; | |
592 | } | |
ea2384d3 FB |
593 | } |
594 | ||
b3976d3c FZ |
595 | static int get_whole_cluster(BlockDriverState *bs, |
596 | VmdkExtent *extent, | |
597 | uint64_t cluster_offset, | |
598 | uint64_t offset, | |
599 | bool allocate) | |
5f4da8c0 | 600 | { |
b3976d3c FZ |
601 | /* 128 sectors * 512 bytes each = grain size 64KB */ |
602 | uint8_t whole_grain[extent->cluster_sectors * 512]; | |
5f4da8c0 | 603 | |
0e69c543 FZ |
604 | /* we will be here if it's first write on non-exist grain(cluster). |
605 | * try to read from parent image, if exist */ | |
b171271a | 606 | if (bs->backing_hd) { |
c336500d | 607 | int ret; |
5f4da8c0 TS |
608 | |
609 | if (!vmdk_is_cid_valid(bs)) | |
610 | return -1; | |
5f4da8c0 | 611 | |
0e69c543 FZ |
612 | /* floor offset to cluster */ |
613 | offset -= offset % (extent->cluster_sectors * 512); | |
c336500d | 614 | ret = bdrv_read(bs->backing_hd, offset >> 9, whole_grain, |
b3976d3c | 615 | extent->cluster_sectors); |
c336500d KW |
616 | if (ret < 0) { |
617 | return -1; | |
618 | } | |
630530a6 | 619 | |
0e69c543 | 620 | /* Write grain only into the active image */ |
b3976d3c FZ |
621 | ret = bdrv_write(extent->file, cluster_offset, whole_grain, |
622 | extent->cluster_sectors); | |
c336500d KW |
623 | if (ret < 0) { |
624 | return -1; | |
630530a6 TS |
625 | } |
626 | } | |
627 | return 0; | |
628 | } | |
629 | ||
b3976d3c | 630 | static int vmdk_L2update(VmdkExtent *extent, VmdkMetaData *m_data) |
630530a6 | 631 | { |
630530a6 | 632 | /* update L2 table */ |
b3976d3c FZ |
633 | if (bdrv_pwrite_sync( |
634 | extent->file, | |
635 | ((int64_t)m_data->l2_offset * 512) | |
636 | + (m_data->l2_index * sizeof(m_data->offset)), | |
637 | &(m_data->offset), | |
638 | sizeof(m_data->offset) | |
639 | ) < 0) { | |
630530a6 | 640 | return -1; |
b3976d3c | 641 | } |
630530a6 | 642 | /* update backup L2 table */ |
b3976d3c FZ |
643 | if (extent->l1_backup_table_offset != 0) { |
644 | m_data->l2_offset = extent->l1_backup_table[m_data->l1_index]; | |
645 | if (bdrv_pwrite_sync( | |
646 | extent->file, | |
647 | ((int64_t)m_data->l2_offset * 512) | |
648 | + (m_data->l2_index * sizeof(m_data->offset)), | |
649 | &(m_data->offset), sizeof(m_data->offset) | |
650 | ) < 0) { | |
5f4da8c0 | 651 | return -1; |
b3976d3c | 652 | } |
5f4da8c0 | 653 | } |
630530a6 | 654 | |
5f4da8c0 TS |
655 | return 0; |
656 | } | |
657 | ||
b3976d3c FZ |
658 | static uint64_t get_cluster_offset(BlockDriverState *bs, |
659 | VmdkExtent *extent, | |
660 | VmdkMetaData *m_data, | |
661 | uint64_t offset, int allocate) | |
ea2384d3 | 662 | { |
ea2384d3 FB |
663 | unsigned int l1_index, l2_offset, l2_index; |
664 | int min_index, i, j; | |
630530a6 | 665 | uint32_t min_count, *l2_table, tmp = 0; |
ea2384d3 | 666 | uint64_t cluster_offset; |
630530a6 TS |
667 | |
668 | if (m_data) | |
669 | m_data->valid = 0; | |
670 | ||
b3976d3c FZ |
671 | l1_index = (offset >> 9) / extent->l1_entry_sectors; |
672 | if (l1_index >= extent->l1_size) { | |
ea2384d3 | 673 | return 0; |
b3976d3c FZ |
674 | } |
675 | l2_offset = extent->l1_table[l1_index]; | |
676 | if (!l2_offset) { | |
ea2384d3 | 677 | return 0; |
b3976d3c | 678 | } |
b4b3ab14 | 679 | for (i = 0; i < L2_CACHE_SIZE; i++) { |
b3976d3c | 680 | if (l2_offset == extent->l2_cache_offsets[i]) { |
ea2384d3 | 681 | /* increment the hit count */ |
b3976d3c | 682 | if (++extent->l2_cache_counts[i] == 0xffffffff) { |
b4b3ab14 | 683 | for (j = 0; j < L2_CACHE_SIZE; j++) { |
b3976d3c | 684 | extent->l2_cache_counts[j] >>= 1; |
ea2384d3 FB |
685 | } |
686 | } | |
b3976d3c | 687 | l2_table = extent->l2_cache + (i * extent->l2_size); |
ea2384d3 FB |
688 | goto found; |
689 | } | |
690 | } | |
691 | /* not found: load a new entry in the least used one */ | |
692 | min_index = 0; | |
693 | min_count = 0xffffffff; | |
b4b3ab14 | 694 | for (i = 0; i < L2_CACHE_SIZE; i++) { |
b3976d3c FZ |
695 | if (extent->l2_cache_counts[i] < min_count) { |
696 | min_count = extent->l2_cache_counts[i]; | |
ea2384d3 FB |
697 | min_index = i; |
698 | } | |
699 | } | |
b3976d3c FZ |
700 | l2_table = extent->l2_cache + (min_index * extent->l2_size); |
701 | if (bdrv_pread( | |
702 | extent->file, | |
703 | (int64_t)l2_offset * 512, | |
704 | l2_table, | |
705 | extent->l2_size * sizeof(uint32_t) | |
706 | ) != extent->l2_size * sizeof(uint32_t)) { | |
ea2384d3 | 707 | return 0; |
b3976d3c | 708 | } |
5f4da8c0 | 709 | |
b3976d3c FZ |
710 | extent->l2_cache_offsets[min_index] = l2_offset; |
711 | extent->l2_cache_counts[min_index] = 1; | |
ea2384d3 | 712 | found: |
b3976d3c | 713 | l2_index = ((offset >> 9) / extent->cluster_sectors) % extent->l2_size; |
ea2384d3 | 714 | cluster_offset = le32_to_cpu(l2_table[l2_index]); |
630530a6 | 715 | |
ff1afc72 FB |
716 | if (!cluster_offset) { |
717 | if (!allocate) | |
718 | return 0; | |
9949f97e | 719 | |
630530a6 | 720 | // Avoid the L2 tables update for the images that have snapshots. |
b3976d3c FZ |
721 | cluster_offset = bdrv_getlength(extent->file); |
722 | bdrv_truncate( | |
723 | extent->file, | |
724 | cluster_offset + (extent->cluster_sectors << 9) | |
725 | ); | |
9949f97e KW |
726 | |
727 | cluster_offset >>= 9; | |
728 | tmp = cpu_to_le32(cluster_offset); | |
729 | l2_table[l2_index] = tmp; | |
630530a6 | 730 | |
630530a6 TS |
731 | /* First of all we write grain itself, to avoid race condition |
732 | * that may to corrupt the image. | |
733 | * This problem may occur because of insufficient space on host disk | |
734 | * or inappropriate VM shutdown. | |
735 | */ | |
b3976d3c FZ |
736 | if (get_whole_cluster( |
737 | bs, extent, cluster_offset, offset, allocate) == -1) | |
5f4da8c0 | 738 | return 0; |
630530a6 TS |
739 | |
740 | if (m_data) { | |
741 | m_data->offset = tmp; | |
742 | m_data->l1_index = l1_index; | |
743 | m_data->l2_index = l2_index; | |
744 | m_data->l2_offset = l2_offset; | |
745 | m_data->valid = 1; | |
746 | } | |
ff1afc72 | 747 | } |
ea2384d3 FB |
748 | cluster_offset <<= 9; |
749 | return cluster_offset; | |
750 | } | |
751 | ||
b3976d3c FZ |
752 | static VmdkExtent *find_extent(BDRVVmdkState *s, |
753 | int64_t sector_num, VmdkExtent *start_hint) | |
754 | { | |
755 | VmdkExtent *extent = start_hint; | |
756 | ||
757 | if (!extent) { | |
758 | extent = &s->extents[0]; | |
759 | } | |
760 | while (extent < &s->extents[s->num_extents]) { | |
761 | if (sector_num < extent->end_sector) { | |
762 | return extent; | |
763 | } | |
764 | extent++; | |
765 | } | |
766 | return NULL; | |
767 | } | |
768 | ||
5fafdf24 | 769 | static int vmdk_is_allocated(BlockDriverState *bs, int64_t sector_num, |
ea2384d3 FB |
770 | int nb_sectors, int *pnum) |
771 | { | |
772 | BDRVVmdkState *s = bs->opaque; | |
ea2384d3 | 773 | |
b3976d3c FZ |
774 | int64_t index_in_cluster, n, ret; |
775 | uint64_t offset; | |
776 | VmdkExtent *extent; | |
777 | ||
778 | extent = find_extent(s, sector_num, NULL); | |
779 | if (!extent) { | |
780 | return 0; | |
781 | } | |
782 | if (extent->flat) { | |
783 | n = extent->end_sector - sector_num; | |
784 | ret = 1; | |
785 | } else { | |
786 | offset = get_cluster_offset(bs, extent, NULL, sector_num * 512, 0); | |
787 | index_in_cluster = sector_num % extent->cluster_sectors; | |
788 | n = extent->cluster_sectors - index_in_cluster; | |
789 | ret = offset ? 1 : 0; | |
790 | } | |
ea2384d3 FB |
791 | if (n > nb_sectors) |
792 | n = nb_sectors; | |
793 | *pnum = n; | |
b3976d3c | 794 | return ret; |
ea2384d3 FB |
795 | } |
796 | ||
5fafdf24 | 797 | static int vmdk_read(BlockDriverState *bs, int64_t sector_num, |
ea2384d3 FB |
798 | uint8_t *buf, int nb_sectors) |
799 | { | |
800 | BDRVVmdkState *s = bs->opaque; | |
b3976d3c FZ |
801 | int ret; |
802 | uint64_t n, index_in_cluster; | |
803 | VmdkExtent *extent = NULL; | |
ea2384d3 | 804 | uint64_t cluster_offset; |
5f4da8c0 | 805 | |
ea2384d3 | 806 | while (nb_sectors > 0) { |
b3976d3c FZ |
807 | extent = find_extent(s, sector_num, extent); |
808 | if (!extent) { | |
809 | return -EIO; | |
810 | } | |
811 | cluster_offset = get_cluster_offset( | |
812 | bs, extent, NULL, sector_num << 9, 0); | |
813 | index_in_cluster = sector_num % extent->cluster_sectors; | |
814 | n = extent->cluster_sectors - index_in_cluster; | |
ea2384d3 FB |
815 | if (n > nb_sectors) |
816 | n = nb_sectors; | |
817 | if (!cluster_offset) { | |
5f4da8c0 | 818 | // try to read from parent image, if exist |
b171271a | 819 | if (bs->backing_hd) { |
5f4da8c0 TS |
820 | if (!vmdk_is_cid_valid(bs)) |
821 | return -1; | |
b171271a | 822 | ret = bdrv_read(bs->backing_hd, sector_num, buf, n); |
5f4da8c0 TS |
823 | if (ret < 0) |
824 | return -1; | |
825 | } else { | |
826 | memset(buf, 0, 512 * n); | |
827 | } | |
ea2384d3 | 828 | } else { |
6511ef77 | 829 | if(bdrv_pread(bs->file, cluster_offset + index_in_cluster * 512, buf, n * 512) != n * 512) |
ea2384d3 FB |
830 | return -1; |
831 | } | |
832 | nb_sectors -= n; | |
833 | sector_num += n; | |
834 | buf += n * 512; | |
835 | } | |
836 | return 0; | |
837 | } | |
838 | ||
5fafdf24 | 839 | static int vmdk_write(BlockDriverState *bs, int64_t sector_num, |
ea2384d3 FB |
840 | const uint8_t *buf, int nb_sectors) |
841 | { | |
ff1afc72 | 842 | BDRVVmdkState *s = bs->opaque; |
b3976d3c FZ |
843 | VmdkExtent *extent = NULL; |
844 | int n; | |
845 | int64_t index_in_cluster; | |
ff1afc72 | 846 | uint64_t cluster_offset; |
5f4da8c0 | 847 | static int cid_update = 0; |
b3976d3c | 848 | VmdkMetaData m_data; |
ff1afc72 | 849 | |
630530a6 TS |
850 | if (sector_num > bs->total_sectors) { |
851 | fprintf(stderr, | |
92868412 JM |
852 | "(VMDK) Wrong offset: sector_num=0x%" PRIx64 |
853 | " total_sectors=0x%" PRIx64 "\n", | |
630530a6 TS |
854 | sector_num, bs->total_sectors); |
855 | return -1; | |
856 | } | |
857 | ||
ff1afc72 | 858 | while (nb_sectors > 0) { |
b3976d3c FZ |
859 | extent = find_extent(s, sector_num, extent); |
860 | if (!extent) { | |
861 | return -EIO; | |
862 | } | |
863 | cluster_offset = get_cluster_offset( | |
864 | bs, | |
865 | extent, | |
866 | &m_data, | |
867 | sector_num << 9, 1); | |
868 | if (!cluster_offset) { | |
ff1afc72 | 869 | return -1; |
b3976d3c FZ |
870 | } |
871 | index_in_cluster = sector_num % extent->cluster_sectors; | |
872 | n = extent->cluster_sectors - index_in_cluster; | |
873 | if (n > nb_sectors) { | |
874 | n = nb_sectors; | |
875 | } | |
630530a6 | 876 | |
b3976d3c FZ |
877 | if (bdrv_pwrite(bs->file, |
878 | cluster_offset + index_in_cluster * 512, | |
879 | buf, n * 512) | |
880 | != n * 512) { | |
ff1afc72 | 881 | return -1; |
b3976d3c | 882 | } |
630530a6 TS |
883 | if (m_data.valid) { |
884 | /* update L2 tables */ | |
b3976d3c | 885 | if (vmdk_L2update(extent, &m_data) == -1) { |
630530a6 | 886 | return -1; |
b3976d3c | 887 | } |
630530a6 | 888 | } |
ff1afc72 FB |
889 | nb_sectors -= n; |
890 | sector_num += n; | |
891 | buf += n * 512; | |
5f4da8c0 TS |
892 | |
893 | // update CID on the first write every time the virtual disk is opened | |
894 | if (!cid_update) { | |
895 | vmdk_write_cid(bs, time(NULL)); | |
896 | cid_update++; | |
897 | } | |
ff1afc72 FB |
898 | } |
899 | return 0; | |
ea2384d3 FB |
900 | } |
901 | ||
0e7e1989 | 902 | static int vmdk_create(const char *filename, QEMUOptionParameter *options) |
8979b227 FB |
903 | { |
904 | int fd, i; | |
905 | VMDK4Header header; | |
906 | uint32_t tmp, magic, grains, gd_size, gt_size, gt_count; | |
7ccfb2eb | 907 | static const char desc_template[] = |
8979b227 FB |
908 | "# Disk DescriptorFile\n" |
909 | "version=1\n" | |
910 | "CID=%x\n" | |
911 | "parentCID=ffffffff\n" | |
912 | "createType=\"monolithicSparse\"\n" | |
913 | "\n" | |
914 | "# Extent description\n" | |
7fd6d9fc | 915 | "RW %" PRId64 " SPARSE \"%s\"\n" |
8979b227 FB |
916 | "\n" |
917 | "# The Disk Data Base \n" | |
918 | "#DDB\n" | |
919 | "\n" | |
ec36ba14 | 920 | "ddb.virtualHWVersion = \"%d\"\n" |
7fd6d9fc | 921 | "ddb.geometry.cylinders = \"%" PRId64 "\"\n" |
8979b227 FB |
922 | "ddb.geometry.heads = \"16\"\n" |
923 | "ddb.geometry.sectors = \"63\"\n" | |
924 | "ddb.adapterType = \"ide\"\n"; | |
925 | char desc[1024]; | |
926 | const char *real_filename, *temp_str; | |
0e7e1989 KW |
927 | int64_t total_size = 0; |
928 | const char *backing_file = NULL; | |
929 | int flags = 0; | |
1640366c | 930 | int ret; |
0e7e1989 KW |
931 | |
932 | // Read out options | |
933 | while (options && options->name) { | |
934 | if (!strcmp(options->name, BLOCK_OPT_SIZE)) { | |
935 | total_size = options->value.n / 512; | |
936 | } else if (!strcmp(options->name, BLOCK_OPT_BACKING_FILE)) { | |
937 | backing_file = options->value.s; | |
938 | } else if (!strcmp(options->name, BLOCK_OPT_COMPAT6)) { | |
939 | flags |= options->value.n ? BLOCK_FLAG_COMPAT6: 0; | |
940 | } | |
941 | options++; | |
942 | } | |
8979b227 FB |
943 | |
944 | /* XXX: add support for backing file */ | |
5f4da8c0 TS |
945 | if (backing_file) { |
946 | return vmdk_snapshot_create(filename, backing_file); | |
947 | } | |
8979b227 FB |
948 | |
949 | fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE, | |
950 | 0644); | |
951 | if (fd < 0) | |
b781cce5 | 952 | return -errno; |
8979b227 FB |
953 | magic = cpu_to_be32(VMDK4_MAGIC); |
954 | memset(&header, 0, sizeof(header)); | |
16372ff0 AG |
955 | header.version = 1; |
956 | header.flags = 3; /* ?? */ | |
957 | header.capacity = total_size; | |
958 | header.granularity = 128; | |
959 | header.num_gtes_per_gte = 512; | |
8979b227 FB |
960 | |
961 | grains = (total_size + header.granularity - 1) / header.granularity; | |
962 | gt_size = ((header.num_gtes_per_gte * sizeof(uint32_t)) + 511) >> 9; | |
963 | gt_count = (grains + header.num_gtes_per_gte - 1) / header.num_gtes_per_gte; | |
964 | gd_size = (gt_count * sizeof(uint32_t) + 511) >> 9; | |
965 | ||
966 | header.desc_offset = 1; | |
967 | header.desc_size = 20; | |
968 | header.rgd_offset = header.desc_offset + header.desc_size; | |
969 | header.gd_offset = header.rgd_offset + gd_size + (gt_size * gt_count); | |
970 | header.grain_offset = | |
971 | ((header.gd_offset + gd_size + (gt_size * gt_count) + | |
972 | header.granularity - 1) / header.granularity) * | |
973 | header.granularity; | |
974 | ||
16372ff0 AG |
975 | /* swap endianness for all header fields */ |
976 | header.version = cpu_to_le32(header.version); | |
977 | header.flags = cpu_to_le32(header.flags); | |
978 | header.capacity = cpu_to_le64(header.capacity); | |
979 | header.granularity = cpu_to_le64(header.granularity); | |
980 | header.num_gtes_per_gte = cpu_to_le32(header.num_gtes_per_gte); | |
8979b227 FB |
981 | header.desc_offset = cpu_to_le64(header.desc_offset); |
982 | header.desc_size = cpu_to_le64(header.desc_size); | |
983 | header.rgd_offset = cpu_to_le64(header.rgd_offset); | |
984 | header.gd_offset = cpu_to_le64(header.gd_offset); | |
985 | header.grain_offset = cpu_to_le64(header.grain_offset); | |
986 | ||
987 | header.check_bytes[0] = 0xa; | |
988 | header.check_bytes[1] = 0x20; | |
989 | header.check_bytes[2] = 0xd; | |
990 | header.check_bytes[3] = 0xa; | |
3b46e624 TS |
991 | |
992 | /* write all the data */ | |
1640366c KS |
993 | ret = qemu_write_full(fd, &magic, sizeof(magic)); |
994 | if (ret != sizeof(magic)) { | |
b781cce5 | 995 | ret = -errno; |
1640366c KS |
996 | goto exit; |
997 | } | |
998 | ret = qemu_write_full(fd, &header, sizeof(header)); | |
999 | if (ret != sizeof(header)) { | |
b781cce5 | 1000 | ret = -errno; |
1640366c KS |
1001 | goto exit; |
1002 | } | |
8979b227 | 1003 | |
16372ff0 | 1004 | ret = ftruncate(fd, le64_to_cpu(header.grain_offset) << 9); |
1640366c | 1005 | if (ret < 0) { |
b781cce5 | 1006 | ret = -errno; |
1640366c KS |
1007 | goto exit; |
1008 | } | |
8979b227 FB |
1009 | |
1010 | /* write grain directory */ | |
1011 | lseek(fd, le64_to_cpu(header.rgd_offset) << 9, SEEK_SET); | |
16372ff0 | 1012 | for (i = 0, tmp = le64_to_cpu(header.rgd_offset) + gd_size; |
1640366c KS |
1013 | i < gt_count; i++, tmp += gt_size) { |
1014 | ret = qemu_write_full(fd, &tmp, sizeof(tmp)); | |
1015 | if (ret != sizeof(tmp)) { | |
b781cce5 | 1016 | ret = -errno; |
1640366c KS |
1017 | goto exit; |
1018 | } | |
1019 | } | |
3b46e624 | 1020 | |
8979b227 FB |
1021 | /* write backup grain directory */ |
1022 | lseek(fd, le64_to_cpu(header.gd_offset) << 9, SEEK_SET); | |
16372ff0 | 1023 | for (i = 0, tmp = le64_to_cpu(header.gd_offset) + gd_size; |
1640366c KS |
1024 | i < gt_count; i++, tmp += gt_size) { |
1025 | ret = qemu_write_full(fd, &tmp, sizeof(tmp)); | |
1026 | if (ret != sizeof(tmp)) { | |
b781cce5 | 1027 | ret = -errno; |
1640366c KS |
1028 | goto exit; |
1029 | } | |
1030 | } | |
8979b227 FB |
1031 | |
1032 | /* compose the descriptor */ | |
1033 | real_filename = filename; | |
1034 | if ((temp_str = strrchr(real_filename, '\\')) != NULL) | |
1035 | real_filename = temp_str + 1; | |
1036 | if ((temp_str = strrchr(real_filename, '/')) != NULL) | |
1037 | real_filename = temp_str + 1; | |
1038 | if ((temp_str = strrchr(real_filename, ':')) != NULL) | |
1039 | real_filename = temp_str + 1; | |
7ccfb2eb | 1040 | snprintf(desc, sizeof(desc), desc_template, (unsigned int)time(NULL), |
7fd6d9fc BS |
1041 | total_size, real_filename, |
1042 | (flags & BLOCK_FLAG_COMPAT6 ? 6 : 4), | |
1043 | total_size / (int64_t)(63 * 16)); | |
8979b227 FB |
1044 | |
1045 | /* write the descriptor */ | |
1046 | lseek(fd, le64_to_cpu(header.desc_offset) << 9, SEEK_SET); | |
1640366c KS |
1047 | ret = qemu_write_full(fd, desc, strlen(desc)); |
1048 | if (ret != strlen(desc)) { | |
b781cce5 | 1049 | ret = -errno; |
1640366c KS |
1050 | goto exit; |
1051 | } | |
8979b227 | 1052 | |
1640366c KS |
1053 | ret = 0; |
1054 | exit: | |
8979b227 | 1055 | close(fd); |
1640366c | 1056 | return ret; |
8979b227 FB |
1057 | } |
1058 | ||
e2731add | 1059 | static void vmdk_close(BlockDriverState *bs) |
ea2384d3 | 1060 | { |
b3976d3c | 1061 | vmdk_free_extents(bs); |
ea2384d3 FB |
1062 | } |
1063 | ||
205ef796 | 1064 | static int vmdk_flush(BlockDriverState *bs) |
7a6cba61 | 1065 | { |
205ef796 | 1066 | return bdrv_flush(bs->file); |
7a6cba61 PB |
1067 | } |
1068 | ||
0e7e1989 KW |
1069 | |
1070 | static QEMUOptionParameter vmdk_create_options[] = { | |
db08adf5 KW |
1071 | { |
1072 | .name = BLOCK_OPT_SIZE, | |
1073 | .type = OPT_SIZE, | |
1074 | .help = "Virtual disk size" | |
1075 | }, | |
1076 | { | |
1077 | .name = BLOCK_OPT_BACKING_FILE, | |
1078 | .type = OPT_STRING, | |
1079 | .help = "File name of a base image" | |
1080 | }, | |
1081 | { | |
1082 | .name = BLOCK_OPT_COMPAT6, | |
1083 | .type = OPT_FLAG, | |
1084 | .help = "VMDK version 6 image" | |
1085 | }, | |
0e7e1989 KW |
1086 | { NULL } |
1087 | }; | |
1088 | ||
5efa9d5a | 1089 | static BlockDriver bdrv_vmdk = { |
e60f469c AJ |
1090 | .format_name = "vmdk", |
1091 | .instance_size = sizeof(BDRVVmdkState), | |
1092 | .bdrv_probe = vmdk_probe, | |
6511ef77 | 1093 | .bdrv_open = vmdk_open, |
e60f469c AJ |
1094 | .bdrv_read = vmdk_read, |
1095 | .bdrv_write = vmdk_write, | |
1096 | .bdrv_close = vmdk_close, | |
1097 | .bdrv_create = vmdk_create, | |
1098 | .bdrv_flush = vmdk_flush, | |
1099 | .bdrv_is_allocated = vmdk_is_allocated, | |
0e7e1989 KW |
1100 | |
1101 | .create_options = vmdk_create_options, | |
ea2384d3 | 1102 | }; |
5efa9d5a AL |
1103 | |
1104 | static void bdrv_vmdk_init(void) | |
1105 | { | |
1106 | bdrv_register(&bdrv_vmdk); | |
1107 | } | |
1108 | ||
1109 | block_init(bdrv_vmdk_init); |