]>
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 { | |
e1da9b24 | 84 | int desc_offset; |
69b4d86d | 85 | bool cid_updated; |
5f4da8c0 | 86 | uint32_t parent_cid; |
b3976d3c FZ |
87 | int num_extents; |
88 | /* Extent array with num_extents entries, ascend ordered by address */ | |
89 | VmdkExtent *extents; | |
ea2384d3 FB |
90 | } BDRVVmdkState; |
91 | ||
630530a6 TS |
92 | typedef struct VmdkMetaData { |
93 | uint32_t offset; | |
94 | unsigned int l1_index; | |
95 | unsigned int l2_index; | |
96 | unsigned int l2_offset; | |
97 | int valid; | |
98 | } VmdkMetaData; | |
99 | ||
ea2384d3 FB |
100 | static int vmdk_probe(const uint8_t *buf, int buf_size, const char *filename) |
101 | { | |
102 | uint32_t magic; | |
103 | ||
104 | if (buf_size < 4) | |
105 | return 0; | |
106 | magic = be32_to_cpu(*(uint32_t *)buf); | |
107 | if (magic == VMDK3_MAGIC || | |
01fc99d6 | 108 | magic == VMDK4_MAGIC) { |
ea2384d3 | 109 | return 100; |
01fc99d6 FZ |
110 | } else { |
111 | const char *p = (const char *)buf; | |
112 | const char *end = p + buf_size; | |
113 | while (p < end) { | |
114 | if (*p == '#') { | |
115 | /* skip comment line */ | |
116 | while (p < end && *p != '\n') { | |
117 | p++; | |
118 | } | |
119 | p++; | |
120 | continue; | |
121 | } | |
122 | if (*p == ' ') { | |
123 | while (p < end && *p == ' ') { | |
124 | p++; | |
125 | } | |
126 | /* skip '\r' if windows line endings used. */ | |
127 | if (p < end && *p == '\r') { | |
128 | p++; | |
129 | } | |
130 | /* only accept blank lines before 'version=' line */ | |
131 | if (p == end || *p != '\n') { | |
132 | return 0; | |
133 | } | |
134 | p++; | |
135 | continue; | |
136 | } | |
137 | if (end - p >= strlen("version=X\n")) { | |
138 | if (strncmp("version=1\n", p, strlen("version=1\n")) == 0 || | |
139 | strncmp("version=2\n", p, strlen("version=2\n")) == 0) { | |
140 | return 100; | |
141 | } | |
142 | } | |
143 | if (end - p >= strlen("version=X\r\n")) { | |
144 | if (strncmp("version=1\r\n", p, strlen("version=1\r\n")) == 0 || | |
145 | strncmp("version=2\r\n", p, strlen("version=2\r\n")) == 0) { | |
146 | return 100; | |
147 | } | |
148 | } | |
149 | return 0; | |
150 | } | |
ea2384d3 | 151 | return 0; |
01fc99d6 | 152 | } |
ea2384d3 FB |
153 | } |
154 | ||
5f4da8c0 TS |
155 | #define CHECK_CID 1 |
156 | ||
3b46e624 | 157 | #define SECTOR_SIZE 512 |
5f4da8c0 | 158 | #define DESC_SIZE 20*SECTOR_SIZE // 20 sectors of 512 bytes each |
5fafdf24 | 159 | #define HEADER_SIZE 512 // first sector of 512 bytes |
5f4da8c0 | 160 | |
b3976d3c FZ |
161 | static void vmdk_free_extents(BlockDriverState *bs) |
162 | { | |
163 | int i; | |
164 | BDRVVmdkState *s = bs->opaque; | |
165 | ||
166 | for (i = 0; i < s->num_extents; i++) { | |
167 | qemu_free(s->extents[i].l1_table); | |
168 | qemu_free(s->extents[i].l2_cache); | |
169 | qemu_free(s->extents[i].l1_backup_table); | |
170 | } | |
171 | qemu_free(s->extents); | |
172 | } | |
173 | ||
5f4da8c0 | 174 | static uint32_t vmdk_read_cid(BlockDriverState *bs, int parent) |
ea2384d3 | 175 | { |
5f4da8c0 TS |
176 | char desc[DESC_SIZE]; |
177 | uint32_t cid; | |
7ccfb2eb | 178 | const char *p_name, *cid_str; |
5f4da8c0 | 179 | size_t cid_str_size; |
e1da9b24 | 180 | BDRVVmdkState *s = bs->opaque; |
5f4da8c0 | 181 | |
e1da9b24 | 182 | if (bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE) != DESC_SIZE) { |
5f4da8c0 | 183 | return 0; |
e1da9b24 | 184 | } |
5f4da8c0 TS |
185 | |
186 | if (parent) { | |
187 | cid_str = "parentCID"; | |
188 | cid_str_size = sizeof("parentCID"); | |
189 | } else { | |
190 | cid_str = "CID"; | |
191 | cid_str_size = sizeof("CID"); | |
192 | } | |
193 | ||
511d2b14 | 194 | if ((p_name = strstr(desc,cid_str)) != NULL) { |
5f4da8c0 TS |
195 | p_name += cid_str_size; |
196 | sscanf(p_name,"%x",&cid); | |
197 | } | |
198 | ||
199 | return cid; | |
200 | } | |
201 | ||
202 | static int vmdk_write_cid(BlockDriverState *bs, uint32_t cid) | |
203 | { | |
5f4da8c0 TS |
204 | char desc[DESC_SIZE], tmp_desc[DESC_SIZE]; |
205 | char *p_name, *tmp_str; | |
e1da9b24 | 206 | BDRVVmdkState *s = bs->opaque; |
5f4da8c0 | 207 | |
e1da9b24 FZ |
208 | memset(desc, 0, sizeof(desc)); |
209 | if (bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE) != DESC_SIZE) { | |
210 | return -EIO; | |
211 | } | |
5f4da8c0 TS |
212 | |
213 | tmp_str = strstr(desc,"parentCID"); | |
363a37d5 | 214 | pstrcpy(tmp_desc, sizeof(tmp_desc), tmp_str); |
511d2b14 | 215 | if ((p_name = strstr(desc,"CID")) != NULL) { |
5f4da8c0 | 216 | p_name += sizeof("CID"); |
363a37d5 BS |
217 | snprintf(p_name, sizeof(desc) - (p_name - desc), "%x\n", cid); |
218 | pstrcat(desc, sizeof(desc), tmp_desc); | |
5f4da8c0 TS |
219 | } |
220 | ||
e1da9b24 FZ |
221 | if (bdrv_pwrite_sync(bs->file, s->desc_offset, desc, DESC_SIZE) < 0) { |
222 | return -EIO; | |
223 | } | |
5f4da8c0 TS |
224 | return 0; |
225 | } | |
226 | ||
227 | static int vmdk_is_cid_valid(BlockDriverState *bs) | |
228 | { | |
229 | #ifdef CHECK_CID | |
230 | BDRVVmdkState *s = bs->opaque; | |
b171271a | 231 | BlockDriverState *p_bs = bs->backing_hd; |
5f4da8c0 TS |
232 | uint32_t cur_pcid; |
233 | ||
234 | if (p_bs) { | |
235 | cur_pcid = vmdk_read_cid(p_bs,0); | |
236 | if (s->parent_cid != cur_pcid) | |
237 | // CID not valid | |
238 | return 0; | |
239 | } | |
240 | #endif | |
241 | // CID valid | |
242 | return 1; | |
243 | } | |
244 | ||
245 | static int vmdk_snapshot_create(const char *filename, const char *backing_file) | |
246 | { | |
247 | int snp_fd, p_fd; | |
53c2e716 | 248 | int ret; |
5f4da8c0 | 249 | uint32_t p_cid; |
5fafdf24 | 250 | char *p_name, *gd_buf, *rgd_buf; |
5f4da8c0 TS |
251 | const char *real_filename, *temp_str; |
252 | VMDK4Header header; | |
253 | uint32_t gde_entries, gd_size; | |
254 | int64_t gd_offset, rgd_offset, capacity, gt_size; | |
255 | char p_desc[DESC_SIZE], s_desc[DESC_SIZE], hdr[HEADER_SIZE]; | |
7ccfb2eb | 256 | static const char desc_template[] = |
5f4da8c0 TS |
257 | "# Disk DescriptorFile\n" |
258 | "version=1\n" | |
259 | "CID=%x\n" | |
260 | "parentCID=%x\n" | |
261 | "createType=\"monolithicSparse\"\n" | |
262 | "parentFileNameHint=\"%s\"\n" | |
263 | "\n" | |
264 | "# Extent description\n" | |
7ccfb2eb | 265 | "RW %u SPARSE \"%s\"\n" |
5f4da8c0 TS |
266 | "\n" |
267 | "# The Disk Data Base \n" | |
268 | "#DDB\n" | |
269 | "\n"; | |
270 | ||
271 | snp_fd = open(filename, O_RDWR | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE, 0644); | |
272 | if (snp_fd < 0) | |
53c2e716 | 273 | return -errno; |
5f4da8c0 TS |
274 | p_fd = open(backing_file, O_RDONLY | O_BINARY | O_LARGEFILE); |
275 | if (p_fd < 0) { | |
276 | close(snp_fd); | |
53c2e716 | 277 | return -errno; |
5f4da8c0 TS |
278 | } |
279 | ||
280 | /* read the header */ | |
53c2e716 JQ |
281 | if (lseek(p_fd, 0x0, SEEK_SET) == -1) { |
282 | ret = -errno; | |
5f4da8c0 | 283 | goto fail; |
53c2e716 JQ |
284 | } |
285 | if (read(p_fd, hdr, HEADER_SIZE) != HEADER_SIZE) { | |
286 | ret = -errno; | |
5f4da8c0 | 287 | goto fail; |
53c2e716 | 288 | } |
5f4da8c0 TS |
289 | |
290 | /* write the header */ | |
53c2e716 JQ |
291 | if (lseek(snp_fd, 0x0, SEEK_SET) == -1) { |
292 | ret = -errno; | |
5f4da8c0 | 293 | goto fail; |
53c2e716 JQ |
294 | } |
295 | if (write(snp_fd, hdr, HEADER_SIZE) == -1) { | |
296 | ret = -errno; | |
5f4da8c0 | 297 | goto fail; |
53c2e716 | 298 | } |
5f4da8c0 TS |
299 | |
300 | memset(&header, 0, sizeof(header)); | |
301 | memcpy(&header,&hdr[4], sizeof(header)); // skip the VMDK4_MAGIC | |
302 | ||
53c2e716 JQ |
303 | if (ftruncate(snp_fd, header.grain_offset << 9)) { |
304 | ret = -errno; | |
1640366c | 305 | goto fail; |
53c2e716 | 306 | } |
5f4da8c0 | 307 | /* the descriptor offset = 0x200 */ |
53c2e716 JQ |
308 | if (lseek(p_fd, 0x200, SEEK_SET) == -1) { |
309 | ret = -errno; | |
5f4da8c0 | 310 | goto fail; |
53c2e716 JQ |
311 | } |
312 | if (read(p_fd, p_desc, DESC_SIZE) != DESC_SIZE) { | |
313 | ret = -errno; | |
5f4da8c0 | 314 | goto fail; |
53c2e716 | 315 | } |
5f4da8c0 | 316 | |
511d2b14 | 317 | if ((p_name = strstr(p_desc,"CID")) != NULL) { |
5f4da8c0 TS |
318 | p_name += sizeof("CID"); |
319 | sscanf(p_name,"%x",&p_cid); | |
320 | } | |
321 | ||
322 | real_filename = filename; | |
323 | if ((temp_str = strrchr(real_filename, '\\')) != NULL) | |
324 | real_filename = temp_str + 1; | |
325 | if ((temp_str = strrchr(real_filename, '/')) != NULL) | |
326 | real_filename = temp_str + 1; | |
327 | if ((temp_str = strrchr(real_filename, ':')) != NULL) | |
328 | real_filename = temp_str + 1; | |
329 | ||
363a37d5 BS |
330 | snprintf(s_desc, sizeof(s_desc), desc_template, p_cid, p_cid, backing_file, |
331 | (uint32_t)header.capacity, real_filename); | |
5f4da8c0 TS |
332 | |
333 | /* write the descriptor */ | |
53c2e716 JQ |
334 | if (lseek(snp_fd, 0x200, SEEK_SET) == -1) { |
335 | ret = -errno; | |
5f4da8c0 | 336 | goto fail; |
53c2e716 JQ |
337 | } |
338 | if (write(snp_fd, s_desc, strlen(s_desc)) == -1) { | |
339 | ret = -errno; | |
5f4da8c0 | 340 | goto fail; |
53c2e716 | 341 | } |
ea2384d3 | 342 | |
5f4da8c0 TS |
343 | gd_offset = header.gd_offset * SECTOR_SIZE; // offset of GD table |
344 | rgd_offset = header.rgd_offset * SECTOR_SIZE; // offset of RGD table | |
345 | capacity = header.capacity * SECTOR_SIZE; // Extent size | |
346 | /* | |
347 | * Each GDE span 32M disk, means: | |
348 | * 512 GTE per GT, each GTE points to grain | |
349 | */ | |
350 | gt_size = (int64_t)header.num_gtes_per_gte * header.granularity * SECTOR_SIZE; | |
53c2e716 JQ |
351 | if (!gt_size) { |
352 | ret = -EINVAL; | |
5f4da8c0 | 353 | goto fail; |
53c2e716 | 354 | } |
5fafdf24 | 355 | gde_entries = (uint32_t)(capacity / gt_size); // number of gde/rgde |
5f4da8c0 TS |
356 | gd_size = gde_entries * sizeof(uint32_t); |
357 | ||
358 | /* write RGD */ | |
359 | rgd_buf = qemu_malloc(gd_size); | |
53c2e716 JQ |
360 | if (lseek(p_fd, rgd_offset, SEEK_SET) == -1) { |
361 | ret = -errno; | |
5f4da8c0 | 362 | goto fail_rgd; |
53c2e716 JQ |
363 | } |
364 | if (read(p_fd, rgd_buf, gd_size) != gd_size) { | |
365 | ret = -errno; | |
5f4da8c0 | 366 | goto fail_rgd; |
53c2e716 JQ |
367 | } |
368 | if (lseek(snp_fd, rgd_offset, SEEK_SET) == -1) { | |
369 | ret = -errno; | |
5f4da8c0 | 370 | goto fail_rgd; |
53c2e716 JQ |
371 | } |
372 | if (write(snp_fd, rgd_buf, gd_size) == -1) { | |
373 | ret = -errno; | |
5f4da8c0 | 374 | goto fail_rgd; |
53c2e716 | 375 | } |
5f4da8c0 TS |
376 | |
377 | /* write GD */ | |
378 | gd_buf = qemu_malloc(gd_size); | |
53c2e716 JQ |
379 | if (lseek(p_fd, gd_offset, SEEK_SET) == -1) { |
380 | ret = -errno; | |
5f4da8c0 | 381 | goto fail_gd; |
53c2e716 JQ |
382 | } |
383 | if (read(p_fd, gd_buf, gd_size) != gd_size) { | |
384 | ret = -errno; | |
5f4da8c0 | 385 | goto fail_gd; |
53c2e716 JQ |
386 | } |
387 | if (lseek(snp_fd, gd_offset, SEEK_SET) == -1) { | |
388 | ret = -errno; | |
5f4da8c0 | 389 | goto fail_gd; |
53c2e716 JQ |
390 | } |
391 | if (write(snp_fd, gd_buf, gd_size) == -1) { | |
392 | ret = -errno; | |
5f4da8c0 | 393 | goto fail_gd; |
53c2e716 | 394 | } |
3829cb46 | 395 | ret = 0; |
5f4da8c0 | 396 | |
3829cb46 | 397 | fail_gd: |
5f4da8c0 | 398 | qemu_free(gd_buf); |
3829cb46 | 399 | fail_rgd: |
5f4da8c0 | 400 | qemu_free(rgd_buf); |
3829cb46 | 401 | fail: |
5f4da8c0 TS |
402 | close(p_fd); |
403 | close(snp_fd); | |
53c2e716 | 404 | return ret; |
5f4da8c0 TS |
405 | } |
406 | ||
9949f97e | 407 | static int vmdk_parent_open(BlockDriverState *bs) |
5f4da8c0 | 408 | { |
5fafdf24 | 409 | char *p_name; |
5f4da8c0 | 410 | char desc[DESC_SIZE]; |
e1da9b24 | 411 | BDRVVmdkState *s = bs->opaque; |
5f4da8c0 | 412 | |
e1da9b24 | 413 | if (bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE) != DESC_SIZE) { |
5f4da8c0 | 414 | return -1; |
e1da9b24 | 415 | } |
5f4da8c0 | 416 | |
511d2b14 | 417 | if ((p_name = strstr(desc,"parentFileNameHint")) != NULL) { |
5f4da8c0 | 418 | char *end_name; |
5f4da8c0 TS |
419 | |
420 | p_name += sizeof("parentFileNameHint") + 1; | |
511d2b14 | 421 | if ((end_name = strchr(p_name,'\"')) == NULL) |
5f4da8c0 | 422 | return -1; |
b171271a | 423 | if ((end_name - p_name) > sizeof (bs->backing_file) - 1) |
b34d259a | 424 | return -1; |
3b46e624 | 425 | |
b171271a | 426 | pstrcpy(bs->backing_file, end_name - p_name + 1, p_name); |
ff1afc72 | 427 | } |
5f4da8c0 TS |
428 | |
429 | return 0; | |
430 | } | |
431 | ||
b3976d3c FZ |
432 | /* Create and append extent to the extent array. Return the added VmdkExtent |
433 | * address. return NULL if allocation failed. */ | |
434 | static VmdkExtent *vmdk_add_extent(BlockDriverState *bs, | |
435 | BlockDriverState *file, bool flat, int64_t sectors, | |
436 | int64_t l1_offset, int64_t l1_backup_offset, | |
437 | uint32_t l1_size, | |
438 | int l2_size, unsigned int cluster_sectors) | |
439 | { | |
440 | VmdkExtent *extent; | |
441 | BDRVVmdkState *s = bs->opaque; | |
442 | ||
443 | s->extents = qemu_realloc(s->extents, | |
444 | (s->num_extents + 1) * sizeof(VmdkExtent)); | |
445 | extent = &s->extents[s->num_extents]; | |
446 | s->num_extents++; | |
447 | ||
448 | memset(extent, 0, sizeof(VmdkExtent)); | |
449 | extent->file = file; | |
450 | extent->flat = flat; | |
451 | extent->sectors = sectors; | |
452 | extent->l1_table_offset = l1_offset; | |
453 | extent->l1_backup_table_offset = l1_backup_offset; | |
454 | extent->l1_size = l1_size; | |
455 | extent->l1_entry_sectors = l2_size * cluster_sectors; | |
456 | extent->l2_size = l2_size; | |
457 | extent->cluster_sectors = cluster_sectors; | |
458 | ||
459 | if (s->num_extents > 1) { | |
460 | extent->end_sector = (*(extent - 1)).end_sector + extent->sectors; | |
461 | } else { | |
462 | extent->end_sector = extent->sectors; | |
463 | } | |
464 | bs->total_sectors = extent->end_sector; | |
465 | return extent; | |
466 | } | |
467 | ||
b4b3ab14 | 468 | static int vmdk_init_tables(BlockDriverState *bs, VmdkExtent *extent) |
5f4da8c0 | 469 | { |
b4b3ab14 FZ |
470 | int ret; |
471 | int l1_size, i; | |
5f4da8c0 | 472 | |
ea2384d3 | 473 | /* read the L1 table */ |
b3976d3c FZ |
474 | l1_size = extent->l1_size * sizeof(uint32_t); |
475 | extent->l1_table = qemu_malloc(l1_size); | |
b4b3ab14 FZ |
476 | ret = bdrv_pread(extent->file, |
477 | extent->l1_table_offset, | |
478 | extent->l1_table, | |
479 | l1_size); | |
480 | if (ret < 0) { | |
481 | goto fail_l1; | |
b3976d3c FZ |
482 | } |
483 | for (i = 0; i < extent->l1_size; i++) { | |
484 | le32_to_cpus(&extent->l1_table[i]); | |
ea2384d3 FB |
485 | } |
486 | ||
b3976d3c FZ |
487 | if (extent->l1_backup_table_offset) { |
488 | extent->l1_backup_table = qemu_malloc(l1_size); | |
b4b3ab14 FZ |
489 | ret = bdrv_pread(extent->file, |
490 | extent->l1_backup_table_offset, | |
491 | extent->l1_backup_table, | |
492 | l1_size); | |
493 | if (ret < 0) { | |
494 | goto fail_l1b; | |
b3976d3c FZ |
495 | } |
496 | for (i = 0; i < extent->l1_size; i++) { | |
497 | le32_to_cpus(&extent->l1_backup_table[i]); | |
ff1afc72 FB |
498 | } |
499 | } | |
500 | ||
b3976d3c FZ |
501 | extent->l2_cache = |
502 | qemu_malloc(extent->l2_size * L2_CACHE_SIZE * sizeof(uint32_t)); | |
ea2384d3 | 503 | return 0; |
b4b3ab14 FZ |
504 | fail_l1b: |
505 | qemu_free(extent->l1_backup_table); | |
506 | fail_l1: | |
507 | qemu_free(extent->l1_table); | |
508 | return ret; | |
509 | } | |
510 | ||
511 | static int vmdk_open_vmdk3(BlockDriverState *bs, int flags) | |
512 | { | |
513 | int ret; | |
514 | uint32_t magic; | |
515 | VMDK3Header header; | |
e1da9b24 | 516 | BDRVVmdkState *s = bs->opaque; |
b4b3ab14 FZ |
517 | VmdkExtent *extent; |
518 | ||
e1da9b24 | 519 | s->desc_offset = 0x200; |
b4b3ab14 FZ |
520 | ret = bdrv_pread(bs->file, sizeof(magic), &header, sizeof(header)); |
521 | if (ret < 0) { | |
522 | goto fail; | |
523 | } | |
524 | extent = vmdk_add_extent(bs, | |
525 | bs->file, false, | |
526 | le32_to_cpu(header.disk_sectors), | |
527 | le32_to_cpu(header.l1dir_offset) << 9, | |
528 | 0, 1 << 6, 1 << 9, | |
529 | le32_to_cpu(header.granularity)); | |
530 | ret = vmdk_init_tables(bs, extent); | |
531 | if (ret) { | |
532 | /* vmdk_init_tables cleans up on fail, so only free allocation of | |
533 | * vmdk_add_extent here. */ | |
534 | goto fail; | |
535 | } | |
536 | return 0; | |
ea2384d3 | 537 | fail: |
b3976d3c | 538 | vmdk_free_extents(bs); |
b4b3ab14 FZ |
539 | return ret; |
540 | } | |
541 | ||
542 | static int vmdk_open_vmdk4(BlockDriverState *bs, int flags) | |
543 | { | |
544 | int ret; | |
545 | uint32_t magic; | |
546 | uint32_t l1_size, l1_entry_sectors; | |
547 | VMDK4Header header; | |
548 | BDRVVmdkState *s = bs->opaque; | |
549 | VmdkExtent *extent; | |
550 | ||
e1da9b24 | 551 | s->desc_offset = 0x200; |
b4b3ab14 FZ |
552 | ret = bdrv_pread(bs->file, sizeof(magic), &header, sizeof(header)); |
553 | if (ret < 0) { | |
554 | goto fail; | |
555 | } | |
556 | l1_entry_sectors = le32_to_cpu(header.num_gtes_per_gte) | |
557 | * le64_to_cpu(header.granularity); | |
558 | l1_size = (le64_to_cpu(header.capacity) + l1_entry_sectors - 1) | |
559 | / l1_entry_sectors; | |
560 | extent = vmdk_add_extent(bs, bs->file, false, | |
561 | le64_to_cpu(header.capacity), | |
562 | le64_to_cpu(header.gd_offset) << 9, | |
563 | le64_to_cpu(header.rgd_offset) << 9, | |
564 | l1_size, | |
565 | le32_to_cpu(header.num_gtes_per_gte), | |
566 | le64_to_cpu(header.granularity)); | |
567 | if (extent->l1_entry_sectors <= 0) { | |
568 | ret = -EINVAL; | |
569 | goto fail; | |
570 | } | |
571 | /* try to open parent images, if exist */ | |
572 | ret = vmdk_parent_open(bs); | |
573 | if (ret) { | |
574 | goto fail; | |
575 | } | |
576 | s->parent_cid = vmdk_read_cid(bs, 1); | |
577 | ret = vmdk_init_tables(bs, extent); | |
578 | if (ret) { | |
579 | goto fail; | |
580 | } | |
581 | return 0; | |
582 | fail: | |
583 | vmdk_free_extents(bs); | |
584 | return ret; | |
585 | } | |
586 | ||
587 | static int vmdk_open(BlockDriverState *bs, int flags) | |
588 | { | |
589 | uint32_t magic; | |
590 | ||
591 | if (bdrv_pread(bs->file, 0, &magic, sizeof(magic)) != sizeof(magic)) { | |
592 | return -EIO; | |
593 | } | |
594 | ||
595 | magic = be32_to_cpu(magic); | |
596 | if (magic == VMDK3_MAGIC) { | |
597 | return vmdk_open_vmdk3(bs, flags); | |
598 | } else if (magic == VMDK4_MAGIC) { | |
599 | return vmdk_open_vmdk4(bs, flags); | |
600 | } else { | |
601 | return -EINVAL; | |
602 | } | |
ea2384d3 FB |
603 | } |
604 | ||
b3976d3c FZ |
605 | static int get_whole_cluster(BlockDriverState *bs, |
606 | VmdkExtent *extent, | |
607 | uint64_t cluster_offset, | |
608 | uint64_t offset, | |
609 | bool allocate) | |
5f4da8c0 | 610 | { |
b3976d3c FZ |
611 | /* 128 sectors * 512 bytes each = grain size 64KB */ |
612 | uint8_t whole_grain[extent->cluster_sectors * 512]; | |
5f4da8c0 | 613 | |
0e69c543 FZ |
614 | /* we will be here if it's first write on non-exist grain(cluster). |
615 | * try to read from parent image, if exist */ | |
b171271a | 616 | if (bs->backing_hd) { |
c336500d | 617 | int ret; |
5f4da8c0 TS |
618 | |
619 | if (!vmdk_is_cid_valid(bs)) | |
620 | return -1; | |
5f4da8c0 | 621 | |
0e69c543 FZ |
622 | /* floor offset to cluster */ |
623 | offset -= offset % (extent->cluster_sectors * 512); | |
c336500d | 624 | ret = bdrv_read(bs->backing_hd, offset >> 9, whole_grain, |
b3976d3c | 625 | extent->cluster_sectors); |
c336500d KW |
626 | if (ret < 0) { |
627 | return -1; | |
628 | } | |
630530a6 | 629 | |
0e69c543 | 630 | /* Write grain only into the active image */ |
b3976d3c FZ |
631 | ret = bdrv_write(extent->file, cluster_offset, whole_grain, |
632 | extent->cluster_sectors); | |
c336500d KW |
633 | if (ret < 0) { |
634 | return -1; | |
630530a6 TS |
635 | } |
636 | } | |
637 | return 0; | |
638 | } | |
639 | ||
b3976d3c | 640 | static int vmdk_L2update(VmdkExtent *extent, VmdkMetaData *m_data) |
630530a6 | 641 | { |
630530a6 | 642 | /* update L2 table */ |
b3976d3c FZ |
643 | if (bdrv_pwrite_sync( |
644 | extent->file, | |
645 | ((int64_t)m_data->l2_offset * 512) | |
646 | + (m_data->l2_index * sizeof(m_data->offset)), | |
647 | &(m_data->offset), | |
648 | sizeof(m_data->offset) | |
649 | ) < 0) { | |
630530a6 | 650 | return -1; |
b3976d3c | 651 | } |
630530a6 | 652 | /* update backup L2 table */ |
b3976d3c FZ |
653 | if (extent->l1_backup_table_offset != 0) { |
654 | m_data->l2_offset = extent->l1_backup_table[m_data->l1_index]; | |
655 | if (bdrv_pwrite_sync( | |
656 | extent->file, | |
657 | ((int64_t)m_data->l2_offset * 512) | |
658 | + (m_data->l2_index * sizeof(m_data->offset)), | |
659 | &(m_data->offset), sizeof(m_data->offset) | |
660 | ) < 0) { | |
5f4da8c0 | 661 | return -1; |
b3976d3c | 662 | } |
5f4da8c0 | 663 | } |
630530a6 | 664 | |
5f4da8c0 TS |
665 | return 0; |
666 | } | |
667 | ||
b3976d3c FZ |
668 | static uint64_t get_cluster_offset(BlockDriverState *bs, |
669 | VmdkExtent *extent, | |
670 | VmdkMetaData *m_data, | |
671 | uint64_t offset, int allocate) | |
ea2384d3 | 672 | { |
ea2384d3 FB |
673 | unsigned int l1_index, l2_offset, l2_index; |
674 | int min_index, i, j; | |
630530a6 | 675 | uint32_t min_count, *l2_table, tmp = 0; |
ea2384d3 | 676 | uint64_t cluster_offset; |
630530a6 TS |
677 | |
678 | if (m_data) | |
679 | m_data->valid = 0; | |
680 | ||
b3976d3c FZ |
681 | l1_index = (offset >> 9) / extent->l1_entry_sectors; |
682 | if (l1_index >= extent->l1_size) { | |
ea2384d3 | 683 | return 0; |
b3976d3c FZ |
684 | } |
685 | l2_offset = extent->l1_table[l1_index]; | |
686 | if (!l2_offset) { | |
ea2384d3 | 687 | return 0; |
b3976d3c | 688 | } |
b4b3ab14 | 689 | for (i = 0; i < L2_CACHE_SIZE; i++) { |
b3976d3c | 690 | if (l2_offset == extent->l2_cache_offsets[i]) { |
ea2384d3 | 691 | /* increment the hit count */ |
b3976d3c | 692 | if (++extent->l2_cache_counts[i] == 0xffffffff) { |
b4b3ab14 | 693 | for (j = 0; j < L2_CACHE_SIZE; j++) { |
b3976d3c | 694 | extent->l2_cache_counts[j] >>= 1; |
ea2384d3 FB |
695 | } |
696 | } | |
b3976d3c | 697 | l2_table = extent->l2_cache + (i * extent->l2_size); |
ea2384d3 FB |
698 | goto found; |
699 | } | |
700 | } | |
701 | /* not found: load a new entry in the least used one */ | |
702 | min_index = 0; | |
703 | min_count = 0xffffffff; | |
b4b3ab14 | 704 | for (i = 0; i < L2_CACHE_SIZE; i++) { |
b3976d3c FZ |
705 | if (extent->l2_cache_counts[i] < min_count) { |
706 | min_count = extent->l2_cache_counts[i]; | |
ea2384d3 FB |
707 | min_index = i; |
708 | } | |
709 | } | |
b3976d3c FZ |
710 | l2_table = extent->l2_cache + (min_index * extent->l2_size); |
711 | if (bdrv_pread( | |
712 | extent->file, | |
713 | (int64_t)l2_offset * 512, | |
714 | l2_table, | |
715 | extent->l2_size * sizeof(uint32_t) | |
716 | ) != extent->l2_size * sizeof(uint32_t)) { | |
ea2384d3 | 717 | return 0; |
b3976d3c | 718 | } |
5f4da8c0 | 719 | |
b3976d3c FZ |
720 | extent->l2_cache_offsets[min_index] = l2_offset; |
721 | extent->l2_cache_counts[min_index] = 1; | |
ea2384d3 | 722 | found: |
b3976d3c | 723 | l2_index = ((offset >> 9) / extent->cluster_sectors) % extent->l2_size; |
ea2384d3 | 724 | cluster_offset = le32_to_cpu(l2_table[l2_index]); |
630530a6 | 725 | |
ff1afc72 FB |
726 | if (!cluster_offset) { |
727 | if (!allocate) | |
728 | return 0; | |
9949f97e | 729 | |
630530a6 | 730 | // Avoid the L2 tables update for the images that have snapshots. |
b3976d3c FZ |
731 | cluster_offset = bdrv_getlength(extent->file); |
732 | bdrv_truncate( | |
733 | extent->file, | |
734 | cluster_offset + (extent->cluster_sectors << 9) | |
735 | ); | |
9949f97e KW |
736 | |
737 | cluster_offset >>= 9; | |
738 | tmp = cpu_to_le32(cluster_offset); | |
739 | l2_table[l2_index] = tmp; | |
630530a6 | 740 | |
630530a6 TS |
741 | /* First of all we write grain itself, to avoid race condition |
742 | * that may to corrupt the image. | |
743 | * This problem may occur because of insufficient space on host disk | |
744 | * or inappropriate VM shutdown. | |
745 | */ | |
b3976d3c FZ |
746 | if (get_whole_cluster( |
747 | bs, extent, cluster_offset, offset, allocate) == -1) | |
5f4da8c0 | 748 | return 0; |
630530a6 TS |
749 | |
750 | if (m_data) { | |
751 | m_data->offset = tmp; | |
752 | m_data->l1_index = l1_index; | |
753 | m_data->l2_index = l2_index; | |
754 | m_data->l2_offset = l2_offset; | |
755 | m_data->valid = 1; | |
756 | } | |
ff1afc72 | 757 | } |
ea2384d3 FB |
758 | cluster_offset <<= 9; |
759 | return cluster_offset; | |
760 | } | |
761 | ||
b3976d3c FZ |
762 | static VmdkExtent *find_extent(BDRVVmdkState *s, |
763 | int64_t sector_num, VmdkExtent *start_hint) | |
764 | { | |
765 | VmdkExtent *extent = start_hint; | |
766 | ||
767 | if (!extent) { | |
768 | extent = &s->extents[0]; | |
769 | } | |
770 | while (extent < &s->extents[s->num_extents]) { | |
771 | if (sector_num < extent->end_sector) { | |
772 | return extent; | |
773 | } | |
774 | extent++; | |
775 | } | |
776 | return NULL; | |
777 | } | |
778 | ||
5fafdf24 | 779 | static int vmdk_is_allocated(BlockDriverState *bs, int64_t sector_num, |
ea2384d3 FB |
780 | int nb_sectors, int *pnum) |
781 | { | |
782 | BDRVVmdkState *s = bs->opaque; | |
ea2384d3 | 783 | |
b3976d3c FZ |
784 | int64_t index_in_cluster, n, ret; |
785 | uint64_t offset; | |
786 | VmdkExtent *extent; | |
787 | ||
788 | extent = find_extent(s, sector_num, NULL); | |
789 | if (!extent) { | |
790 | return 0; | |
791 | } | |
792 | if (extent->flat) { | |
793 | n = extent->end_sector - sector_num; | |
794 | ret = 1; | |
795 | } else { | |
796 | offset = get_cluster_offset(bs, extent, NULL, sector_num * 512, 0); | |
797 | index_in_cluster = sector_num % extent->cluster_sectors; | |
798 | n = extent->cluster_sectors - index_in_cluster; | |
799 | ret = offset ? 1 : 0; | |
800 | } | |
ea2384d3 FB |
801 | if (n > nb_sectors) |
802 | n = nb_sectors; | |
803 | *pnum = n; | |
b3976d3c | 804 | return ret; |
ea2384d3 FB |
805 | } |
806 | ||
5fafdf24 | 807 | static int vmdk_read(BlockDriverState *bs, int64_t sector_num, |
ea2384d3 FB |
808 | uint8_t *buf, int nb_sectors) |
809 | { | |
810 | BDRVVmdkState *s = bs->opaque; | |
b3976d3c FZ |
811 | int ret; |
812 | uint64_t n, index_in_cluster; | |
813 | VmdkExtent *extent = NULL; | |
ea2384d3 | 814 | uint64_t cluster_offset; |
5f4da8c0 | 815 | |
ea2384d3 | 816 | while (nb_sectors > 0) { |
b3976d3c FZ |
817 | extent = find_extent(s, sector_num, extent); |
818 | if (!extent) { | |
819 | return -EIO; | |
820 | } | |
821 | cluster_offset = get_cluster_offset( | |
822 | bs, extent, NULL, sector_num << 9, 0); | |
823 | index_in_cluster = sector_num % extent->cluster_sectors; | |
824 | n = extent->cluster_sectors - index_in_cluster; | |
ea2384d3 FB |
825 | if (n > nb_sectors) |
826 | n = nb_sectors; | |
827 | if (!cluster_offset) { | |
5f4da8c0 | 828 | // try to read from parent image, if exist |
b171271a | 829 | if (bs->backing_hd) { |
5f4da8c0 TS |
830 | if (!vmdk_is_cid_valid(bs)) |
831 | return -1; | |
b171271a | 832 | ret = bdrv_read(bs->backing_hd, sector_num, buf, n); |
5f4da8c0 TS |
833 | if (ret < 0) |
834 | return -1; | |
835 | } else { | |
836 | memset(buf, 0, 512 * n); | |
837 | } | |
ea2384d3 | 838 | } else { |
6511ef77 | 839 | if(bdrv_pread(bs->file, cluster_offset + index_in_cluster * 512, buf, n * 512) != n * 512) |
ea2384d3 FB |
840 | return -1; |
841 | } | |
842 | nb_sectors -= n; | |
843 | sector_num += n; | |
844 | buf += n * 512; | |
845 | } | |
846 | return 0; | |
847 | } | |
848 | ||
5fafdf24 | 849 | static int vmdk_write(BlockDriverState *bs, int64_t sector_num, |
ea2384d3 FB |
850 | const uint8_t *buf, int nb_sectors) |
851 | { | |
ff1afc72 | 852 | BDRVVmdkState *s = bs->opaque; |
b3976d3c FZ |
853 | VmdkExtent *extent = NULL; |
854 | int n; | |
855 | int64_t index_in_cluster; | |
ff1afc72 | 856 | uint64_t cluster_offset; |
b3976d3c | 857 | VmdkMetaData m_data; |
ff1afc72 | 858 | |
630530a6 TS |
859 | if (sector_num > bs->total_sectors) { |
860 | fprintf(stderr, | |
92868412 JM |
861 | "(VMDK) Wrong offset: sector_num=0x%" PRIx64 |
862 | " total_sectors=0x%" PRIx64 "\n", | |
630530a6 TS |
863 | sector_num, bs->total_sectors); |
864 | return -1; | |
865 | } | |
866 | ||
ff1afc72 | 867 | while (nb_sectors > 0) { |
b3976d3c FZ |
868 | extent = find_extent(s, sector_num, extent); |
869 | if (!extent) { | |
870 | return -EIO; | |
871 | } | |
872 | cluster_offset = get_cluster_offset( | |
873 | bs, | |
874 | extent, | |
875 | &m_data, | |
876 | sector_num << 9, 1); | |
877 | if (!cluster_offset) { | |
ff1afc72 | 878 | return -1; |
b3976d3c FZ |
879 | } |
880 | index_in_cluster = sector_num % extent->cluster_sectors; | |
881 | n = extent->cluster_sectors - index_in_cluster; | |
882 | if (n > nb_sectors) { | |
883 | n = nb_sectors; | |
884 | } | |
630530a6 | 885 | |
b3976d3c FZ |
886 | if (bdrv_pwrite(bs->file, |
887 | cluster_offset + index_in_cluster * 512, | |
888 | buf, n * 512) | |
889 | != n * 512) { | |
ff1afc72 | 890 | return -1; |
b3976d3c | 891 | } |
630530a6 TS |
892 | if (m_data.valid) { |
893 | /* update L2 tables */ | |
b3976d3c | 894 | if (vmdk_L2update(extent, &m_data) == -1) { |
630530a6 | 895 | return -1; |
b3976d3c | 896 | } |
630530a6 | 897 | } |
ff1afc72 FB |
898 | nb_sectors -= n; |
899 | sector_num += n; | |
900 | buf += n * 512; | |
5f4da8c0 TS |
901 | |
902 | // update CID on the first write every time the virtual disk is opened | |
69b4d86d | 903 | if (!s->cid_updated) { |
5f4da8c0 | 904 | vmdk_write_cid(bs, time(NULL)); |
69b4d86d | 905 | s->cid_updated = true; |
5f4da8c0 | 906 | } |
ff1afc72 FB |
907 | } |
908 | return 0; | |
ea2384d3 FB |
909 | } |
910 | ||
0e7e1989 | 911 | static int vmdk_create(const char *filename, QEMUOptionParameter *options) |
8979b227 FB |
912 | { |
913 | int fd, i; | |
914 | VMDK4Header header; | |
915 | uint32_t tmp, magic, grains, gd_size, gt_size, gt_count; | |
7ccfb2eb | 916 | static const char desc_template[] = |
8979b227 FB |
917 | "# Disk DescriptorFile\n" |
918 | "version=1\n" | |
919 | "CID=%x\n" | |
920 | "parentCID=ffffffff\n" | |
921 | "createType=\"monolithicSparse\"\n" | |
922 | "\n" | |
923 | "# Extent description\n" | |
7fd6d9fc | 924 | "RW %" PRId64 " SPARSE \"%s\"\n" |
8979b227 FB |
925 | "\n" |
926 | "# The Disk Data Base \n" | |
927 | "#DDB\n" | |
928 | "\n" | |
ec36ba14 | 929 | "ddb.virtualHWVersion = \"%d\"\n" |
7fd6d9fc | 930 | "ddb.geometry.cylinders = \"%" PRId64 "\"\n" |
8979b227 FB |
931 | "ddb.geometry.heads = \"16\"\n" |
932 | "ddb.geometry.sectors = \"63\"\n" | |
933 | "ddb.adapterType = \"ide\"\n"; | |
934 | char desc[1024]; | |
935 | const char *real_filename, *temp_str; | |
0e7e1989 KW |
936 | int64_t total_size = 0; |
937 | const char *backing_file = NULL; | |
938 | int flags = 0; | |
1640366c | 939 | int ret; |
0e7e1989 KW |
940 | |
941 | // Read out options | |
942 | while (options && options->name) { | |
943 | if (!strcmp(options->name, BLOCK_OPT_SIZE)) { | |
944 | total_size = options->value.n / 512; | |
945 | } else if (!strcmp(options->name, BLOCK_OPT_BACKING_FILE)) { | |
946 | backing_file = options->value.s; | |
947 | } else if (!strcmp(options->name, BLOCK_OPT_COMPAT6)) { | |
948 | flags |= options->value.n ? BLOCK_FLAG_COMPAT6: 0; | |
949 | } | |
950 | options++; | |
951 | } | |
8979b227 FB |
952 | |
953 | /* XXX: add support for backing file */ | |
5f4da8c0 TS |
954 | if (backing_file) { |
955 | return vmdk_snapshot_create(filename, backing_file); | |
956 | } | |
8979b227 FB |
957 | |
958 | fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE, | |
959 | 0644); | |
960 | if (fd < 0) | |
b781cce5 | 961 | return -errno; |
8979b227 FB |
962 | magic = cpu_to_be32(VMDK4_MAGIC); |
963 | memset(&header, 0, sizeof(header)); | |
16372ff0 AG |
964 | header.version = 1; |
965 | header.flags = 3; /* ?? */ | |
966 | header.capacity = total_size; | |
967 | header.granularity = 128; | |
968 | header.num_gtes_per_gte = 512; | |
8979b227 FB |
969 | |
970 | grains = (total_size + header.granularity - 1) / header.granularity; | |
971 | gt_size = ((header.num_gtes_per_gte * sizeof(uint32_t)) + 511) >> 9; | |
972 | gt_count = (grains + header.num_gtes_per_gte - 1) / header.num_gtes_per_gte; | |
973 | gd_size = (gt_count * sizeof(uint32_t) + 511) >> 9; | |
974 | ||
975 | header.desc_offset = 1; | |
976 | header.desc_size = 20; | |
977 | header.rgd_offset = header.desc_offset + header.desc_size; | |
978 | header.gd_offset = header.rgd_offset + gd_size + (gt_size * gt_count); | |
979 | header.grain_offset = | |
980 | ((header.gd_offset + gd_size + (gt_size * gt_count) + | |
981 | header.granularity - 1) / header.granularity) * | |
982 | header.granularity; | |
983 | ||
16372ff0 AG |
984 | /* swap endianness for all header fields */ |
985 | header.version = cpu_to_le32(header.version); | |
986 | header.flags = cpu_to_le32(header.flags); | |
987 | header.capacity = cpu_to_le64(header.capacity); | |
988 | header.granularity = cpu_to_le64(header.granularity); | |
989 | header.num_gtes_per_gte = cpu_to_le32(header.num_gtes_per_gte); | |
8979b227 FB |
990 | header.desc_offset = cpu_to_le64(header.desc_offset); |
991 | header.desc_size = cpu_to_le64(header.desc_size); | |
992 | header.rgd_offset = cpu_to_le64(header.rgd_offset); | |
993 | header.gd_offset = cpu_to_le64(header.gd_offset); | |
994 | header.grain_offset = cpu_to_le64(header.grain_offset); | |
995 | ||
996 | header.check_bytes[0] = 0xa; | |
997 | header.check_bytes[1] = 0x20; | |
998 | header.check_bytes[2] = 0xd; | |
999 | header.check_bytes[3] = 0xa; | |
3b46e624 TS |
1000 | |
1001 | /* write all the data */ | |
1640366c KS |
1002 | ret = qemu_write_full(fd, &magic, sizeof(magic)); |
1003 | if (ret != sizeof(magic)) { | |
b781cce5 | 1004 | ret = -errno; |
1640366c KS |
1005 | goto exit; |
1006 | } | |
1007 | ret = qemu_write_full(fd, &header, sizeof(header)); | |
1008 | if (ret != sizeof(header)) { | |
b781cce5 | 1009 | ret = -errno; |
1640366c KS |
1010 | goto exit; |
1011 | } | |
8979b227 | 1012 | |
16372ff0 | 1013 | ret = ftruncate(fd, le64_to_cpu(header.grain_offset) << 9); |
1640366c | 1014 | if (ret < 0) { |
b781cce5 | 1015 | ret = -errno; |
1640366c KS |
1016 | goto exit; |
1017 | } | |
8979b227 FB |
1018 | |
1019 | /* write grain directory */ | |
1020 | lseek(fd, le64_to_cpu(header.rgd_offset) << 9, SEEK_SET); | |
16372ff0 | 1021 | for (i = 0, tmp = le64_to_cpu(header.rgd_offset) + gd_size; |
1640366c KS |
1022 | i < gt_count; i++, tmp += gt_size) { |
1023 | ret = qemu_write_full(fd, &tmp, sizeof(tmp)); | |
1024 | if (ret != sizeof(tmp)) { | |
b781cce5 | 1025 | ret = -errno; |
1640366c KS |
1026 | goto exit; |
1027 | } | |
1028 | } | |
3b46e624 | 1029 | |
8979b227 FB |
1030 | /* write backup grain directory */ |
1031 | lseek(fd, le64_to_cpu(header.gd_offset) << 9, SEEK_SET); | |
16372ff0 | 1032 | for (i = 0, tmp = le64_to_cpu(header.gd_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 | } | |
8979b227 FB |
1040 | |
1041 | /* compose the descriptor */ | |
1042 | real_filename = filename; | |
1043 | if ((temp_str = strrchr(real_filename, '\\')) != NULL) | |
1044 | real_filename = temp_str + 1; | |
1045 | if ((temp_str = strrchr(real_filename, '/')) != NULL) | |
1046 | real_filename = temp_str + 1; | |
1047 | if ((temp_str = strrchr(real_filename, ':')) != NULL) | |
1048 | real_filename = temp_str + 1; | |
7ccfb2eb | 1049 | snprintf(desc, sizeof(desc), desc_template, (unsigned int)time(NULL), |
7fd6d9fc BS |
1050 | total_size, real_filename, |
1051 | (flags & BLOCK_FLAG_COMPAT6 ? 6 : 4), | |
1052 | total_size / (int64_t)(63 * 16)); | |
8979b227 FB |
1053 | |
1054 | /* write the descriptor */ | |
1055 | lseek(fd, le64_to_cpu(header.desc_offset) << 9, SEEK_SET); | |
1640366c KS |
1056 | ret = qemu_write_full(fd, desc, strlen(desc)); |
1057 | if (ret != strlen(desc)) { | |
b781cce5 | 1058 | ret = -errno; |
1640366c KS |
1059 | goto exit; |
1060 | } | |
8979b227 | 1061 | |
1640366c KS |
1062 | ret = 0; |
1063 | exit: | |
8979b227 | 1064 | close(fd); |
1640366c | 1065 | return ret; |
8979b227 FB |
1066 | } |
1067 | ||
e2731add | 1068 | static void vmdk_close(BlockDriverState *bs) |
ea2384d3 | 1069 | { |
b3976d3c | 1070 | vmdk_free_extents(bs); |
ea2384d3 FB |
1071 | } |
1072 | ||
205ef796 | 1073 | static int vmdk_flush(BlockDriverState *bs) |
7a6cba61 | 1074 | { |
333c574d FZ |
1075 | int i, ret, err; |
1076 | BDRVVmdkState *s = bs->opaque; | |
1077 | ||
1078 | ret = bdrv_flush(bs->file); | |
1079 | for (i = 0; i < s->num_extents; i++) { | |
1080 | err = bdrv_flush(s->extents[i].file); | |
1081 | if (err < 0) { | |
1082 | ret = err; | |
1083 | } | |
1084 | } | |
1085 | return ret; | |
7a6cba61 PB |
1086 | } |
1087 | ||
0e7e1989 KW |
1088 | |
1089 | static QEMUOptionParameter vmdk_create_options[] = { | |
db08adf5 KW |
1090 | { |
1091 | .name = BLOCK_OPT_SIZE, | |
1092 | .type = OPT_SIZE, | |
1093 | .help = "Virtual disk size" | |
1094 | }, | |
1095 | { | |
1096 | .name = BLOCK_OPT_BACKING_FILE, | |
1097 | .type = OPT_STRING, | |
1098 | .help = "File name of a base image" | |
1099 | }, | |
1100 | { | |
1101 | .name = BLOCK_OPT_COMPAT6, | |
1102 | .type = OPT_FLAG, | |
1103 | .help = "VMDK version 6 image" | |
1104 | }, | |
0e7e1989 KW |
1105 | { NULL } |
1106 | }; | |
1107 | ||
5efa9d5a | 1108 | static BlockDriver bdrv_vmdk = { |
e60f469c AJ |
1109 | .format_name = "vmdk", |
1110 | .instance_size = sizeof(BDRVVmdkState), | |
1111 | .bdrv_probe = vmdk_probe, | |
6511ef77 | 1112 | .bdrv_open = vmdk_open, |
e60f469c AJ |
1113 | .bdrv_read = vmdk_read, |
1114 | .bdrv_write = vmdk_write, | |
1115 | .bdrv_close = vmdk_close, | |
1116 | .bdrv_create = vmdk_create, | |
1117 | .bdrv_flush = vmdk_flush, | |
1118 | .bdrv_is_allocated = vmdk_is_allocated, | |
0e7e1989 KW |
1119 | |
1120 | .create_options = vmdk_create_options, | |
ea2384d3 | 1121 | }; |
5efa9d5a AL |
1122 | |
1123 | static void bdrv_vmdk_init(void) | |
1124 | { | |
1125 | bdrv_register(&bdrv_vmdk); | |
1126 | } | |
1127 | ||
1128 | block_init(bdrv_vmdk_init); |