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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 |
5f4da8c0 | 159 | #define DESC_SIZE 20*SECTOR_SIZE // 20 sectors of 512 bytes each |
5fafdf24 | 160 | #define HEADER_SIZE 512 // first sector of 512 bytes |
5f4da8c0 | 161 | |
b3976d3c FZ |
162 | static void vmdk_free_extents(BlockDriverState *bs) |
163 | { | |
164 | int i; | |
165 | BDRVVmdkState *s = bs->opaque; | |
166 | ||
167 | for (i = 0; i < s->num_extents; i++) { | |
168 | qemu_free(s->extents[i].l1_table); | |
169 | qemu_free(s->extents[i].l2_cache); | |
170 | qemu_free(s->extents[i].l1_backup_table); | |
171 | } | |
172 | qemu_free(s->extents); | |
173 | } | |
174 | ||
5f4da8c0 | 175 | static uint32_t vmdk_read_cid(BlockDriverState *bs, int parent) |
ea2384d3 | 176 | { |
5f4da8c0 TS |
177 | char desc[DESC_SIZE]; |
178 | uint32_t cid; | |
7ccfb2eb | 179 | const char *p_name, *cid_str; |
5f4da8c0 | 180 | size_t cid_str_size; |
e1da9b24 | 181 | BDRVVmdkState *s = bs->opaque; |
5f4da8c0 | 182 | |
e1da9b24 | 183 | if (bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE) != DESC_SIZE) { |
5f4da8c0 | 184 | return 0; |
e1da9b24 | 185 | } |
5f4da8c0 TS |
186 | |
187 | if (parent) { | |
188 | cid_str = "parentCID"; | |
189 | cid_str_size = sizeof("parentCID"); | |
190 | } else { | |
191 | cid_str = "CID"; | |
192 | cid_str_size = sizeof("CID"); | |
193 | } | |
194 | ||
511d2b14 | 195 | if ((p_name = strstr(desc,cid_str)) != NULL) { |
5f4da8c0 TS |
196 | p_name += cid_str_size; |
197 | sscanf(p_name,"%x",&cid); | |
198 | } | |
199 | ||
200 | return cid; | |
201 | } | |
202 | ||
203 | static int vmdk_write_cid(BlockDriverState *bs, uint32_t cid) | |
204 | { | |
5f4da8c0 TS |
205 | char desc[DESC_SIZE], tmp_desc[DESC_SIZE]; |
206 | char *p_name, *tmp_str; | |
e1da9b24 | 207 | BDRVVmdkState *s = bs->opaque; |
5f4da8c0 | 208 | |
e1da9b24 FZ |
209 | memset(desc, 0, sizeof(desc)); |
210 | if (bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE) != DESC_SIZE) { | |
211 | return -EIO; | |
212 | } | |
5f4da8c0 TS |
213 | |
214 | tmp_str = strstr(desc,"parentCID"); | |
363a37d5 | 215 | pstrcpy(tmp_desc, sizeof(tmp_desc), tmp_str); |
511d2b14 | 216 | if ((p_name = strstr(desc,"CID")) != NULL) { |
5f4da8c0 | 217 | p_name += sizeof("CID"); |
363a37d5 BS |
218 | snprintf(p_name, sizeof(desc) - (p_name - desc), "%x\n", cid); |
219 | pstrcat(desc, sizeof(desc), tmp_desc); | |
5f4da8c0 TS |
220 | } |
221 | ||
e1da9b24 FZ |
222 | if (bdrv_pwrite_sync(bs->file, s->desc_offset, desc, DESC_SIZE) < 0) { |
223 | return -EIO; | |
224 | } | |
5f4da8c0 TS |
225 | return 0; |
226 | } | |
227 | ||
228 | static int vmdk_is_cid_valid(BlockDriverState *bs) | |
229 | { | |
230 | #ifdef CHECK_CID | |
231 | BDRVVmdkState *s = bs->opaque; | |
b171271a | 232 | BlockDriverState *p_bs = bs->backing_hd; |
5f4da8c0 TS |
233 | uint32_t cur_pcid; |
234 | ||
235 | if (p_bs) { | |
236 | cur_pcid = vmdk_read_cid(p_bs,0); | |
237 | if (s->parent_cid != cur_pcid) | |
238 | // CID not valid | |
239 | return 0; | |
240 | } | |
241 | #endif | |
242 | // CID valid | |
243 | return 1; | |
244 | } | |
245 | ||
246 | static int vmdk_snapshot_create(const char *filename, const char *backing_file) | |
247 | { | |
248 | int snp_fd, p_fd; | |
53c2e716 | 249 | int ret; |
5f4da8c0 | 250 | uint32_t p_cid; |
5fafdf24 | 251 | char *p_name, *gd_buf, *rgd_buf; |
5f4da8c0 TS |
252 | const char *real_filename, *temp_str; |
253 | VMDK4Header header; | |
254 | uint32_t gde_entries, gd_size; | |
255 | int64_t gd_offset, rgd_offset, capacity, gt_size; | |
256 | char p_desc[DESC_SIZE], s_desc[DESC_SIZE], hdr[HEADER_SIZE]; | |
7ccfb2eb | 257 | static const char desc_template[] = |
5f4da8c0 TS |
258 | "# Disk DescriptorFile\n" |
259 | "version=1\n" | |
260 | "CID=%x\n" | |
261 | "parentCID=%x\n" | |
262 | "createType=\"monolithicSparse\"\n" | |
263 | "parentFileNameHint=\"%s\"\n" | |
264 | "\n" | |
265 | "# Extent description\n" | |
7ccfb2eb | 266 | "RW %u SPARSE \"%s\"\n" |
5f4da8c0 TS |
267 | "\n" |
268 | "# The Disk Data Base \n" | |
269 | "#DDB\n" | |
270 | "\n"; | |
271 | ||
272 | snp_fd = open(filename, O_RDWR | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE, 0644); | |
273 | if (snp_fd < 0) | |
53c2e716 | 274 | return -errno; |
5f4da8c0 TS |
275 | p_fd = open(backing_file, O_RDONLY | O_BINARY | O_LARGEFILE); |
276 | if (p_fd < 0) { | |
277 | close(snp_fd); | |
53c2e716 | 278 | return -errno; |
5f4da8c0 TS |
279 | } |
280 | ||
281 | /* read the header */ | |
53c2e716 JQ |
282 | if (lseek(p_fd, 0x0, SEEK_SET) == -1) { |
283 | ret = -errno; | |
5f4da8c0 | 284 | goto fail; |
53c2e716 JQ |
285 | } |
286 | if (read(p_fd, hdr, HEADER_SIZE) != HEADER_SIZE) { | |
287 | ret = -errno; | |
5f4da8c0 | 288 | goto fail; |
53c2e716 | 289 | } |
5f4da8c0 TS |
290 | |
291 | /* write the header */ | |
53c2e716 JQ |
292 | if (lseek(snp_fd, 0x0, SEEK_SET) == -1) { |
293 | ret = -errno; | |
5f4da8c0 | 294 | goto fail; |
53c2e716 JQ |
295 | } |
296 | if (write(snp_fd, hdr, HEADER_SIZE) == -1) { | |
297 | ret = -errno; | |
5f4da8c0 | 298 | goto fail; |
53c2e716 | 299 | } |
5f4da8c0 TS |
300 | |
301 | memset(&header, 0, sizeof(header)); | |
302 | memcpy(&header,&hdr[4], sizeof(header)); // skip the VMDK4_MAGIC | |
303 | ||
53c2e716 JQ |
304 | if (ftruncate(snp_fd, header.grain_offset << 9)) { |
305 | ret = -errno; | |
1640366c | 306 | goto fail; |
53c2e716 | 307 | } |
5f4da8c0 | 308 | /* the descriptor offset = 0x200 */ |
53c2e716 JQ |
309 | if (lseek(p_fd, 0x200, SEEK_SET) == -1) { |
310 | ret = -errno; | |
5f4da8c0 | 311 | goto fail; |
53c2e716 JQ |
312 | } |
313 | if (read(p_fd, p_desc, DESC_SIZE) != DESC_SIZE) { | |
314 | ret = -errno; | |
5f4da8c0 | 315 | goto fail; |
53c2e716 | 316 | } |
5f4da8c0 | 317 | |
511d2b14 | 318 | if ((p_name = strstr(p_desc,"CID")) != NULL) { |
5f4da8c0 TS |
319 | p_name += sizeof("CID"); |
320 | sscanf(p_name,"%x",&p_cid); | |
321 | } | |
322 | ||
323 | real_filename = filename; | |
324 | if ((temp_str = strrchr(real_filename, '\\')) != NULL) | |
325 | real_filename = temp_str + 1; | |
326 | if ((temp_str = strrchr(real_filename, '/')) != NULL) | |
327 | real_filename = temp_str + 1; | |
328 | if ((temp_str = strrchr(real_filename, ':')) != NULL) | |
329 | real_filename = temp_str + 1; | |
330 | ||
363a37d5 BS |
331 | snprintf(s_desc, sizeof(s_desc), desc_template, p_cid, p_cid, backing_file, |
332 | (uint32_t)header.capacity, real_filename); | |
5f4da8c0 TS |
333 | |
334 | /* write the descriptor */ | |
53c2e716 JQ |
335 | if (lseek(snp_fd, 0x200, SEEK_SET) == -1) { |
336 | ret = -errno; | |
5f4da8c0 | 337 | goto fail; |
53c2e716 JQ |
338 | } |
339 | if (write(snp_fd, s_desc, strlen(s_desc)) == -1) { | |
340 | ret = -errno; | |
5f4da8c0 | 341 | goto fail; |
53c2e716 | 342 | } |
ea2384d3 | 343 | |
5f4da8c0 TS |
344 | gd_offset = header.gd_offset * SECTOR_SIZE; // offset of GD table |
345 | rgd_offset = header.rgd_offset * SECTOR_SIZE; // offset of RGD table | |
346 | capacity = header.capacity * SECTOR_SIZE; // Extent size | |
347 | /* | |
348 | * Each GDE span 32M disk, means: | |
349 | * 512 GTE per GT, each GTE points to grain | |
350 | */ | |
351 | gt_size = (int64_t)header.num_gtes_per_gte * header.granularity * SECTOR_SIZE; | |
53c2e716 JQ |
352 | if (!gt_size) { |
353 | ret = -EINVAL; | |
5f4da8c0 | 354 | goto fail; |
53c2e716 | 355 | } |
5fafdf24 | 356 | gde_entries = (uint32_t)(capacity / gt_size); // number of gde/rgde |
5f4da8c0 TS |
357 | gd_size = gde_entries * sizeof(uint32_t); |
358 | ||
359 | /* write RGD */ | |
360 | rgd_buf = qemu_malloc(gd_size); | |
53c2e716 JQ |
361 | if (lseek(p_fd, rgd_offset, SEEK_SET) == -1) { |
362 | ret = -errno; | |
5f4da8c0 | 363 | goto fail_rgd; |
53c2e716 JQ |
364 | } |
365 | if (read(p_fd, rgd_buf, gd_size) != gd_size) { | |
366 | ret = -errno; | |
5f4da8c0 | 367 | goto fail_rgd; |
53c2e716 JQ |
368 | } |
369 | if (lseek(snp_fd, rgd_offset, SEEK_SET) == -1) { | |
370 | ret = -errno; | |
5f4da8c0 | 371 | goto fail_rgd; |
53c2e716 JQ |
372 | } |
373 | if (write(snp_fd, rgd_buf, gd_size) == -1) { | |
374 | ret = -errno; | |
5f4da8c0 | 375 | goto fail_rgd; |
53c2e716 | 376 | } |
5f4da8c0 TS |
377 | |
378 | /* write GD */ | |
379 | gd_buf = qemu_malloc(gd_size); | |
53c2e716 JQ |
380 | if (lseek(p_fd, gd_offset, SEEK_SET) == -1) { |
381 | ret = -errno; | |
5f4da8c0 | 382 | goto fail_gd; |
53c2e716 JQ |
383 | } |
384 | if (read(p_fd, gd_buf, gd_size) != gd_size) { | |
385 | ret = -errno; | |
5f4da8c0 | 386 | goto fail_gd; |
53c2e716 JQ |
387 | } |
388 | if (lseek(snp_fd, gd_offset, SEEK_SET) == -1) { | |
389 | ret = -errno; | |
5f4da8c0 | 390 | goto fail_gd; |
53c2e716 JQ |
391 | } |
392 | if (write(snp_fd, gd_buf, gd_size) == -1) { | |
393 | ret = -errno; | |
5f4da8c0 | 394 | goto fail_gd; |
53c2e716 | 395 | } |
3829cb46 | 396 | ret = 0; |
5f4da8c0 | 397 | |
3829cb46 | 398 | fail_gd: |
5f4da8c0 | 399 | qemu_free(gd_buf); |
3829cb46 | 400 | fail_rgd: |
5f4da8c0 | 401 | qemu_free(rgd_buf); |
3829cb46 | 402 | fail: |
5f4da8c0 TS |
403 | close(p_fd); |
404 | close(snp_fd); | |
53c2e716 | 405 | return ret; |
5f4da8c0 TS |
406 | } |
407 | ||
9949f97e | 408 | static int vmdk_parent_open(BlockDriverState *bs) |
5f4da8c0 | 409 | { |
5fafdf24 | 410 | char *p_name; |
7fa60fa3 | 411 | char desc[DESC_SIZE + 1]; |
e1da9b24 | 412 | BDRVVmdkState *s = bs->opaque; |
5f4da8c0 | 413 | |
7fa60fa3 | 414 | desc[DESC_SIZE] = '\0'; |
e1da9b24 | 415 | if (bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE) != DESC_SIZE) { |
5f4da8c0 | 416 | return -1; |
e1da9b24 | 417 | } |
5f4da8c0 | 418 | |
511d2b14 | 419 | if ((p_name = strstr(desc,"parentFileNameHint")) != NULL) { |
5f4da8c0 | 420 | char *end_name; |
5f4da8c0 TS |
421 | |
422 | p_name += sizeof("parentFileNameHint") + 1; | |
511d2b14 | 423 | if ((end_name = strchr(p_name,'\"')) == NULL) |
5f4da8c0 | 424 | return -1; |
b171271a | 425 | if ((end_name - p_name) > sizeof (bs->backing_file) - 1) |
b34d259a | 426 | return -1; |
3b46e624 | 427 | |
b171271a | 428 | pstrcpy(bs->backing_file, end_name - p_name + 1, p_name); |
ff1afc72 | 429 | } |
5f4da8c0 TS |
430 | |
431 | return 0; | |
432 | } | |
433 | ||
b3976d3c FZ |
434 | /* Create and append extent to the extent array. Return the added VmdkExtent |
435 | * address. return NULL if allocation failed. */ | |
436 | static VmdkExtent *vmdk_add_extent(BlockDriverState *bs, | |
437 | BlockDriverState *file, bool flat, int64_t sectors, | |
438 | int64_t l1_offset, int64_t l1_backup_offset, | |
439 | uint32_t l1_size, | |
440 | int l2_size, unsigned int cluster_sectors) | |
441 | { | |
442 | VmdkExtent *extent; | |
443 | BDRVVmdkState *s = bs->opaque; | |
444 | ||
445 | s->extents = qemu_realloc(s->extents, | |
446 | (s->num_extents + 1) * sizeof(VmdkExtent)); | |
447 | extent = &s->extents[s->num_extents]; | |
448 | s->num_extents++; | |
449 | ||
450 | memset(extent, 0, sizeof(VmdkExtent)); | |
451 | extent->file = file; | |
452 | extent->flat = flat; | |
453 | extent->sectors = sectors; | |
454 | extent->l1_table_offset = l1_offset; | |
455 | extent->l1_backup_table_offset = l1_backup_offset; | |
456 | extent->l1_size = l1_size; | |
457 | extent->l1_entry_sectors = l2_size * cluster_sectors; | |
458 | extent->l2_size = l2_size; | |
459 | extent->cluster_sectors = cluster_sectors; | |
460 | ||
461 | if (s->num_extents > 1) { | |
462 | extent->end_sector = (*(extent - 1)).end_sector + extent->sectors; | |
463 | } else { | |
464 | extent->end_sector = extent->sectors; | |
465 | } | |
466 | bs->total_sectors = extent->end_sector; | |
467 | return extent; | |
468 | } | |
469 | ||
b4b3ab14 | 470 | static int vmdk_init_tables(BlockDriverState *bs, VmdkExtent *extent) |
5f4da8c0 | 471 | { |
b4b3ab14 FZ |
472 | int ret; |
473 | int l1_size, i; | |
5f4da8c0 | 474 | |
ea2384d3 | 475 | /* read the L1 table */ |
b3976d3c FZ |
476 | l1_size = extent->l1_size * sizeof(uint32_t); |
477 | extent->l1_table = qemu_malloc(l1_size); | |
b4b3ab14 FZ |
478 | ret = bdrv_pread(extent->file, |
479 | extent->l1_table_offset, | |
480 | extent->l1_table, | |
481 | l1_size); | |
482 | if (ret < 0) { | |
483 | goto fail_l1; | |
b3976d3c FZ |
484 | } |
485 | for (i = 0; i < extent->l1_size; i++) { | |
486 | le32_to_cpus(&extent->l1_table[i]); | |
ea2384d3 FB |
487 | } |
488 | ||
b3976d3c FZ |
489 | if (extent->l1_backup_table_offset) { |
490 | extent->l1_backup_table = qemu_malloc(l1_size); | |
b4b3ab14 FZ |
491 | ret = bdrv_pread(extent->file, |
492 | extent->l1_backup_table_offset, | |
493 | extent->l1_backup_table, | |
494 | l1_size); | |
495 | if (ret < 0) { | |
496 | goto fail_l1b; | |
b3976d3c FZ |
497 | } |
498 | for (i = 0; i < extent->l1_size; i++) { | |
499 | le32_to_cpus(&extent->l1_backup_table[i]); | |
ff1afc72 FB |
500 | } |
501 | } | |
502 | ||
b3976d3c FZ |
503 | extent->l2_cache = |
504 | qemu_malloc(extent->l2_size * L2_CACHE_SIZE * sizeof(uint32_t)); | |
ea2384d3 | 505 | return 0; |
b4b3ab14 FZ |
506 | fail_l1b: |
507 | qemu_free(extent->l1_backup_table); | |
508 | fail_l1: | |
509 | qemu_free(extent->l1_table); | |
510 | return ret; | |
511 | } | |
512 | ||
513 | static int vmdk_open_vmdk3(BlockDriverState *bs, int flags) | |
514 | { | |
515 | int ret; | |
516 | uint32_t magic; | |
517 | VMDK3Header header; | |
e1da9b24 | 518 | BDRVVmdkState *s = bs->opaque; |
b4b3ab14 FZ |
519 | VmdkExtent *extent; |
520 | ||
e1da9b24 | 521 | s->desc_offset = 0x200; |
b4b3ab14 FZ |
522 | ret = bdrv_pread(bs->file, sizeof(magic), &header, sizeof(header)); |
523 | if (ret < 0) { | |
524 | goto fail; | |
525 | } | |
526 | extent = vmdk_add_extent(bs, | |
527 | bs->file, false, | |
528 | le32_to_cpu(header.disk_sectors), | |
529 | le32_to_cpu(header.l1dir_offset) << 9, | |
530 | 0, 1 << 6, 1 << 9, | |
531 | le32_to_cpu(header.granularity)); | |
532 | ret = vmdk_init_tables(bs, extent); | |
533 | if (ret) { | |
534 | /* vmdk_init_tables cleans up on fail, so only free allocation of | |
535 | * vmdk_add_extent here. */ | |
536 | goto fail; | |
537 | } | |
538 | return 0; | |
ea2384d3 | 539 | fail: |
b3976d3c | 540 | vmdk_free_extents(bs); |
b4b3ab14 FZ |
541 | return ret; |
542 | } | |
543 | ||
544 | static int vmdk_open_vmdk4(BlockDriverState *bs, int flags) | |
545 | { | |
546 | int ret; | |
547 | uint32_t magic; | |
548 | uint32_t l1_size, l1_entry_sectors; | |
549 | VMDK4Header header; | |
550 | BDRVVmdkState *s = bs->opaque; | |
551 | VmdkExtent *extent; | |
552 | ||
e1da9b24 | 553 | s->desc_offset = 0x200; |
b4b3ab14 FZ |
554 | ret = bdrv_pread(bs->file, sizeof(magic), &header, sizeof(header)); |
555 | if (ret < 0) { | |
556 | goto fail; | |
557 | } | |
558 | l1_entry_sectors = le32_to_cpu(header.num_gtes_per_gte) | |
559 | * le64_to_cpu(header.granularity); | |
560 | l1_size = (le64_to_cpu(header.capacity) + l1_entry_sectors - 1) | |
561 | / l1_entry_sectors; | |
562 | extent = vmdk_add_extent(bs, bs->file, false, | |
563 | le64_to_cpu(header.capacity), | |
564 | le64_to_cpu(header.gd_offset) << 9, | |
565 | le64_to_cpu(header.rgd_offset) << 9, | |
566 | l1_size, | |
567 | le32_to_cpu(header.num_gtes_per_gte), | |
568 | le64_to_cpu(header.granularity)); | |
569 | if (extent->l1_entry_sectors <= 0) { | |
570 | ret = -EINVAL; | |
571 | goto fail; | |
572 | } | |
573 | /* try to open parent images, if exist */ | |
574 | ret = vmdk_parent_open(bs); | |
575 | if (ret) { | |
576 | goto fail; | |
577 | } | |
578 | s->parent_cid = vmdk_read_cid(bs, 1); | |
579 | ret = vmdk_init_tables(bs, extent); | |
580 | if (ret) { | |
581 | goto fail; | |
582 | } | |
583 | return 0; | |
584 | fail: | |
585 | vmdk_free_extents(bs); | |
586 | return ret; | |
587 | } | |
588 | ||
7fa60fa3 FZ |
589 | /* find an option value out of descriptor file */ |
590 | static int vmdk_parse_description(const char *desc, const char *opt_name, | |
591 | char *buf, int buf_size) | |
592 | { | |
593 | char *opt_pos, *opt_end; | |
594 | const char *end = desc + strlen(desc); | |
595 | ||
596 | opt_pos = strstr(desc, opt_name); | |
597 | if (!opt_pos) { | |
598 | return -1; | |
599 | } | |
600 | /* Skip "=\"" following opt_name */ | |
601 | opt_pos += strlen(opt_name) + 2; | |
602 | if (opt_pos >= end) { | |
603 | return -1; | |
604 | } | |
605 | opt_end = opt_pos; | |
606 | while (opt_end < end && *opt_end != '"') { | |
607 | opt_end++; | |
608 | } | |
609 | if (opt_end == end || buf_size < opt_end - opt_pos + 1) { | |
610 | return -1; | |
611 | } | |
612 | pstrcpy(buf, opt_end - opt_pos + 1, opt_pos); | |
613 | return 0; | |
614 | } | |
615 | ||
616 | static int vmdk_parse_extents(const char *desc, BlockDriverState *bs, | |
617 | const char *desc_file_path) | |
618 | { | |
619 | int ret; | |
620 | char access[11]; | |
621 | char type[11]; | |
622 | char fname[512]; | |
623 | const char *p = desc; | |
624 | int64_t sectors = 0; | |
625 | int64_t flat_offset; | |
626 | ||
627 | while (*p) { | |
628 | /* parse extent line: | |
629 | * RW [size in sectors] FLAT "file-name.vmdk" OFFSET | |
630 | * or | |
631 | * RW [size in sectors] SPARSE "file-name.vmdk" | |
632 | */ | |
633 | flat_offset = -1; | |
634 | ret = sscanf(p, "%10s %" SCNd64 " %10s %511s %" SCNd64, | |
635 | access, §ors, type, fname, &flat_offset); | |
636 | if (ret < 4 || strcmp(access, "RW")) { | |
637 | goto next_line; | |
638 | } else if (!strcmp(type, "FLAT")) { | |
639 | if (ret != 5 || flat_offset < 0) { | |
640 | return -EINVAL; | |
641 | } | |
642 | } else if (ret != 4) { | |
643 | return -EINVAL; | |
644 | } | |
645 | ||
646 | /* trim the quotation marks around */ | |
647 | if (fname[0] == '"') { | |
648 | memmove(fname, fname + 1, strlen(fname)); | |
649 | if (strlen(fname) <= 1 || fname[strlen(fname) - 1] != '"') { | |
650 | return -EINVAL; | |
651 | } | |
652 | fname[strlen(fname) - 1] = '\0'; | |
653 | } | |
654 | if (sectors <= 0 || | |
655 | (strcmp(type, "FLAT") && strcmp(type, "SPARSE")) || | |
656 | (strcmp(access, "RW"))) { | |
657 | goto next_line; | |
658 | } | |
659 | ||
660 | /* save to extents array */ | |
661 | if (!strcmp(type, "FLAT")) { | |
662 | /* FLAT extent */ | |
663 | char extent_path[PATH_MAX]; | |
664 | BlockDriverState *extent_file; | |
665 | VmdkExtent *extent; | |
666 | ||
667 | path_combine(extent_path, sizeof(extent_path), | |
668 | desc_file_path, fname); | |
669 | ret = bdrv_file_open(&extent_file, extent_path, bs->open_flags); | |
670 | if (ret) { | |
671 | return ret; | |
672 | } | |
673 | extent = vmdk_add_extent(bs, extent_file, true, sectors, | |
674 | 0, 0, 0, 0, sectors); | |
675 | extent->flat_start_offset = flat_offset; | |
676 | } else { | |
677 | /* SPARSE extent, not supported for now */ | |
678 | fprintf(stderr, | |
679 | "VMDK: Not supported extent type \"%s\""".\n", type); | |
680 | return -ENOTSUP; | |
681 | } | |
682 | next_line: | |
683 | /* move to next line */ | |
684 | while (*p && *p != '\n') { | |
685 | p++; | |
686 | } | |
687 | p++; | |
688 | } | |
689 | return 0; | |
690 | } | |
691 | ||
692 | static int vmdk_open_desc_file(BlockDriverState *bs, int flags) | |
693 | { | |
694 | int ret; | |
695 | char buf[2048]; | |
696 | char ct[128]; | |
697 | BDRVVmdkState *s = bs->opaque; | |
698 | ||
699 | ret = bdrv_pread(bs->file, 0, buf, sizeof(buf)); | |
700 | if (ret < 0) { | |
701 | return ret; | |
702 | } | |
703 | buf[2047] = '\0'; | |
704 | if (vmdk_parse_description(buf, "createType", ct, sizeof(ct))) { | |
705 | return -EINVAL; | |
706 | } | |
707 | if (strcmp(ct, "monolithicFlat")) { | |
708 | fprintf(stderr, | |
709 | "VMDK: Not supported image type \"%s\""".\n", ct); | |
710 | return -ENOTSUP; | |
711 | } | |
712 | s->desc_offset = 0; | |
713 | ret = vmdk_parse_extents(buf, bs, bs->file->filename); | |
714 | if (ret) { | |
715 | return ret; | |
716 | } | |
717 | ||
718 | /* try to open parent images, if exist */ | |
719 | if (vmdk_parent_open(bs)) { | |
720 | qemu_free(s->extents); | |
721 | return -EINVAL; | |
722 | } | |
723 | s->parent_cid = vmdk_read_cid(bs, 1); | |
724 | return 0; | |
725 | } | |
726 | ||
b4b3ab14 FZ |
727 | static int vmdk_open(BlockDriverState *bs, int flags) |
728 | { | |
729 | uint32_t magic; | |
730 | ||
731 | if (bdrv_pread(bs->file, 0, &magic, sizeof(magic)) != sizeof(magic)) { | |
732 | return -EIO; | |
733 | } | |
734 | ||
735 | magic = be32_to_cpu(magic); | |
736 | if (magic == VMDK3_MAGIC) { | |
737 | return vmdk_open_vmdk3(bs, flags); | |
738 | } else if (magic == VMDK4_MAGIC) { | |
739 | return vmdk_open_vmdk4(bs, flags); | |
740 | } else { | |
7fa60fa3 | 741 | return vmdk_open_desc_file(bs, flags); |
b4b3ab14 | 742 | } |
ea2384d3 FB |
743 | } |
744 | ||
b3976d3c FZ |
745 | static int get_whole_cluster(BlockDriverState *bs, |
746 | VmdkExtent *extent, | |
747 | uint64_t cluster_offset, | |
748 | uint64_t offset, | |
749 | bool allocate) | |
5f4da8c0 | 750 | { |
b3976d3c FZ |
751 | /* 128 sectors * 512 bytes each = grain size 64KB */ |
752 | uint8_t whole_grain[extent->cluster_sectors * 512]; | |
5f4da8c0 | 753 | |
0e69c543 FZ |
754 | /* we will be here if it's first write on non-exist grain(cluster). |
755 | * try to read from parent image, if exist */ | |
b171271a | 756 | if (bs->backing_hd) { |
c336500d | 757 | int ret; |
5f4da8c0 TS |
758 | |
759 | if (!vmdk_is_cid_valid(bs)) | |
760 | return -1; | |
5f4da8c0 | 761 | |
0e69c543 FZ |
762 | /* floor offset to cluster */ |
763 | offset -= offset % (extent->cluster_sectors * 512); | |
c336500d | 764 | ret = bdrv_read(bs->backing_hd, offset >> 9, whole_grain, |
b3976d3c | 765 | extent->cluster_sectors); |
c336500d KW |
766 | if (ret < 0) { |
767 | return -1; | |
768 | } | |
630530a6 | 769 | |
0e69c543 | 770 | /* Write grain only into the active image */ |
b3976d3c FZ |
771 | ret = bdrv_write(extent->file, cluster_offset, whole_grain, |
772 | extent->cluster_sectors); | |
c336500d KW |
773 | if (ret < 0) { |
774 | return -1; | |
630530a6 TS |
775 | } |
776 | } | |
777 | return 0; | |
778 | } | |
779 | ||
b3976d3c | 780 | static int vmdk_L2update(VmdkExtent *extent, VmdkMetaData *m_data) |
630530a6 | 781 | { |
630530a6 | 782 | /* update L2 table */ |
b3976d3c FZ |
783 | if (bdrv_pwrite_sync( |
784 | extent->file, | |
785 | ((int64_t)m_data->l2_offset * 512) | |
786 | + (m_data->l2_index * sizeof(m_data->offset)), | |
787 | &(m_data->offset), | |
788 | sizeof(m_data->offset) | |
789 | ) < 0) { | |
630530a6 | 790 | return -1; |
b3976d3c | 791 | } |
630530a6 | 792 | /* update backup L2 table */ |
b3976d3c FZ |
793 | if (extent->l1_backup_table_offset != 0) { |
794 | m_data->l2_offset = extent->l1_backup_table[m_data->l1_index]; | |
795 | if (bdrv_pwrite_sync( | |
796 | extent->file, | |
797 | ((int64_t)m_data->l2_offset * 512) | |
798 | + (m_data->l2_index * sizeof(m_data->offset)), | |
799 | &(m_data->offset), sizeof(m_data->offset) | |
800 | ) < 0) { | |
5f4da8c0 | 801 | return -1; |
b3976d3c | 802 | } |
5f4da8c0 | 803 | } |
630530a6 | 804 | |
5f4da8c0 TS |
805 | return 0; |
806 | } | |
807 | ||
91b85bd3 | 808 | static int get_cluster_offset(BlockDriverState *bs, |
b3976d3c FZ |
809 | VmdkExtent *extent, |
810 | VmdkMetaData *m_data, | |
91b85bd3 FZ |
811 | uint64_t offset, |
812 | int allocate, | |
813 | uint64_t *cluster_offset) | |
ea2384d3 | 814 | { |
ea2384d3 FB |
815 | unsigned int l1_index, l2_offset, l2_index; |
816 | int min_index, i, j; | |
630530a6 | 817 | uint32_t min_count, *l2_table, tmp = 0; |
630530a6 TS |
818 | |
819 | if (m_data) | |
820 | m_data->valid = 0; | |
91b85bd3 | 821 | if (extent->flat) { |
7fa60fa3 | 822 | *cluster_offset = extent->flat_start_offset; |
91b85bd3 FZ |
823 | return 0; |
824 | } | |
630530a6 | 825 | |
b3976d3c FZ |
826 | l1_index = (offset >> 9) / extent->l1_entry_sectors; |
827 | if (l1_index >= extent->l1_size) { | |
91b85bd3 | 828 | return -1; |
b3976d3c FZ |
829 | } |
830 | l2_offset = extent->l1_table[l1_index]; | |
831 | if (!l2_offset) { | |
91b85bd3 | 832 | return -1; |
b3976d3c | 833 | } |
b4b3ab14 | 834 | for (i = 0; i < L2_CACHE_SIZE; i++) { |
b3976d3c | 835 | if (l2_offset == extent->l2_cache_offsets[i]) { |
ea2384d3 | 836 | /* increment the hit count */ |
b3976d3c | 837 | if (++extent->l2_cache_counts[i] == 0xffffffff) { |
b4b3ab14 | 838 | for (j = 0; j < L2_CACHE_SIZE; j++) { |
b3976d3c | 839 | extent->l2_cache_counts[j] >>= 1; |
ea2384d3 FB |
840 | } |
841 | } | |
b3976d3c | 842 | l2_table = extent->l2_cache + (i * extent->l2_size); |
ea2384d3 FB |
843 | goto found; |
844 | } | |
845 | } | |
846 | /* not found: load a new entry in the least used one */ | |
847 | min_index = 0; | |
848 | min_count = 0xffffffff; | |
b4b3ab14 | 849 | for (i = 0; i < L2_CACHE_SIZE; i++) { |
b3976d3c FZ |
850 | if (extent->l2_cache_counts[i] < min_count) { |
851 | min_count = extent->l2_cache_counts[i]; | |
ea2384d3 FB |
852 | min_index = i; |
853 | } | |
854 | } | |
b3976d3c FZ |
855 | l2_table = extent->l2_cache + (min_index * extent->l2_size); |
856 | if (bdrv_pread( | |
857 | extent->file, | |
858 | (int64_t)l2_offset * 512, | |
859 | l2_table, | |
860 | extent->l2_size * sizeof(uint32_t) | |
861 | ) != extent->l2_size * sizeof(uint32_t)) { | |
91b85bd3 | 862 | return -1; |
b3976d3c | 863 | } |
5f4da8c0 | 864 | |
b3976d3c FZ |
865 | extent->l2_cache_offsets[min_index] = l2_offset; |
866 | extent->l2_cache_counts[min_index] = 1; | |
ea2384d3 | 867 | found: |
b3976d3c | 868 | l2_index = ((offset >> 9) / extent->cluster_sectors) % extent->l2_size; |
91b85bd3 | 869 | *cluster_offset = le32_to_cpu(l2_table[l2_index]); |
630530a6 | 870 | |
91b85bd3 FZ |
871 | if (!*cluster_offset) { |
872 | if (!allocate) { | |
873 | return -1; | |
874 | } | |
9949f97e | 875 | |
630530a6 | 876 | // Avoid the L2 tables update for the images that have snapshots. |
91b85bd3 | 877 | *cluster_offset = bdrv_getlength(extent->file); |
b3976d3c FZ |
878 | bdrv_truncate( |
879 | extent->file, | |
91b85bd3 | 880 | *cluster_offset + (extent->cluster_sectors << 9) |
b3976d3c | 881 | ); |
9949f97e | 882 | |
91b85bd3 FZ |
883 | *cluster_offset >>= 9; |
884 | tmp = cpu_to_le32(*cluster_offset); | |
9949f97e | 885 | l2_table[l2_index] = tmp; |
630530a6 | 886 | |
630530a6 TS |
887 | /* First of all we write grain itself, to avoid race condition |
888 | * that may to corrupt the image. | |
889 | * This problem may occur because of insufficient space on host disk | |
890 | * or inappropriate VM shutdown. | |
891 | */ | |
b3976d3c | 892 | if (get_whole_cluster( |
91b85bd3 FZ |
893 | bs, extent, *cluster_offset, offset, allocate) == -1) |
894 | return -1; | |
630530a6 TS |
895 | |
896 | if (m_data) { | |
897 | m_data->offset = tmp; | |
898 | m_data->l1_index = l1_index; | |
899 | m_data->l2_index = l2_index; | |
900 | m_data->l2_offset = l2_offset; | |
901 | m_data->valid = 1; | |
902 | } | |
ff1afc72 | 903 | } |
91b85bd3 FZ |
904 | *cluster_offset <<= 9; |
905 | return 0; | |
ea2384d3 FB |
906 | } |
907 | ||
b3976d3c FZ |
908 | static VmdkExtent *find_extent(BDRVVmdkState *s, |
909 | int64_t sector_num, VmdkExtent *start_hint) | |
910 | { | |
911 | VmdkExtent *extent = start_hint; | |
912 | ||
913 | if (!extent) { | |
914 | extent = &s->extents[0]; | |
915 | } | |
916 | while (extent < &s->extents[s->num_extents]) { | |
917 | if (sector_num < extent->end_sector) { | |
918 | return extent; | |
919 | } | |
920 | extent++; | |
921 | } | |
922 | return NULL; | |
923 | } | |
924 | ||
5fafdf24 | 925 | static int vmdk_is_allocated(BlockDriverState *bs, int64_t sector_num, |
ea2384d3 FB |
926 | int nb_sectors, int *pnum) |
927 | { | |
928 | BDRVVmdkState *s = bs->opaque; | |
b3976d3c FZ |
929 | int64_t index_in_cluster, n, ret; |
930 | uint64_t offset; | |
931 | VmdkExtent *extent; | |
932 | ||
933 | extent = find_extent(s, sector_num, NULL); | |
934 | if (!extent) { | |
935 | return 0; | |
936 | } | |
91b85bd3 FZ |
937 | ret = get_cluster_offset(bs, extent, NULL, |
938 | sector_num * 512, 0, &offset); | |
939 | /* get_cluster_offset returning 0 means success */ | |
940 | ret = !ret; | |
941 | ||
942 | index_in_cluster = sector_num % extent->cluster_sectors; | |
943 | n = extent->cluster_sectors - index_in_cluster; | |
ea2384d3 FB |
944 | if (n > nb_sectors) |
945 | n = nb_sectors; | |
946 | *pnum = n; | |
b3976d3c | 947 | return ret; |
ea2384d3 FB |
948 | } |
949 | ||
5fafdf24 | 950 | static int vmdk_read(BlockDriverState *bs, int64_t sector_num, |
ea2384d3 FB |
951 | uint8_t *buf, int nb_sectors) |
952 | { | |
953 | BDRVVmdkState *s = bs->opaque; | |
b3976d3c FZ |
954 | int ret; |
955 | uint64_t n, index_in_cluster; | |
956 | VmdkExtent *extent = NULL; | |
ea2384d3 | 957 | uint64_t cluster_offset; |
5f4da8c0 | 958 | |
ea2384d3 | 959 | while (nb_sectors > 0) { |
b3976d3c FZ |
960 | extent = find_extent(s, sector_num, extent); |
961 | if (!extent) { | |
962 | return -EIO; | |
963 | } | |
91b85bd3 FZ |
964 | ret = get_cluster_offset( |
965 | bs, extent, NULL, | |
966 | sector_num << 9, 0, &cluster_offset); | |
b3976d3c FZ |
967 | index_in_cluster = sector_num % extent->cluster_sectors; |
968 | n = extent->cluster_sectors - index_in_cluster; | |
ea2384d3 FB |
969 | if (n > nb_sectors) |
970 | n = nb_sectors; | |
91b85bd3 FZ |
971 | if (ret) { |
972 | /* if not allocated, try to read from parent image, if exist */ | |
b171271a | 973 | if (bs->backing_hd) { |
5f4da8c0 | 974 | if (!vmdk_is_cid_valid(bs)) |
7fa60fa3 | 975 | return -EINVAL; |
b171271a | 976 | ret = bdrv_read(bs->backing_hd, sector_num, buf, n); |
5f4da8c0 | 977 | if (ret < 0) |
7fa60fa3 | 978 | return ret; |
5f4da8c0 TS |
979 | } else { |
980 | memset(buf, 0, 512 * n); | |
981 | } | |
ea2384d3 | 982 | } else { |
7fa60fa3 FZ |
983 | ret = bdrv_pread(extent->file, |
984 | cluster_offset + index_in_cluster * 512, | |
985 | buf, n * 512); | |
986 | if (ret < 0) { | |
987 | return ret; | |
988 | } | |
ea2384d3 FB |
989 | } |
990 | nb_sectors -= n; | |
991 | sector_num += n; | |
992 | buf += n * 512; | |
993 | } | |
994 | return 0; | |
995 | } | |
996 | ||
5fafdf24 | 997 | static int vmdk_write(BlockDriverState *bs, int64_t sector_num, |
ea2384d3 FB |
998 | const uint8_t *buf, int nb_sectors) |
999 | { | |
ff1afc72 | 1000 | BDRVVmdkState *s = bs->opaque; |
b3976d3c | 1001 | VmdkExtent *extent = NULL; |
91b85bd3 | 1002 | int n, ret; |
b3976d3c | 1003 | int64_t index_in_cluster; |
ff1afc72 | 1004 | uint64_t cluster_offset; |
b3976d3c | 1005 | VmdkMetaData m_data; |
ff1afc72 | 1006 | |
630530a6 TS |
1007 | if (sector_num > bs->total_sectors) { |
1008 | fprintf(stderr, | |
92868412 JM |
1009 | "(VMDK) Wrong offset: sector_num=0x%" PRIx64 |
1010 | " total_sectors=0x%" PRIx64 "\n", | |
630530a6 | 1011 | sector_num, bs->total_sectors); |
7fa60fa3 | 1012 | return -EIO; |
630530a6 TS |
1013 | } |
1014 | ||
ff1afc72 | 1015 | while (nb_sectors > 0) { |
b3976d3c FZ |
1016 | extent = find_extent(s, sector_num, extent); |
1017 | if (!extent) { | |
1018 | return -EIO; | |
1019 | } | |
91b85bd3 | 1020 | ret = get_cluster_offset( |
b3976d3c FZ |
1021 | bs, |
1022 | extent, | |
1023 | &m_data, | |
91b85bd3 FZ |
1024 | sector_num << 9, 1, |
1025 | &cluster_offset); | |
1026 | if (ret) { | |
1027 | return -EINVAL; | |
b3976d3c FZ |
1028 | } |
1029 | index_in_cluster = sector_num % extent->cluster_sectors; | |
1030 | n = extent->cluster_sectors - index_in_cluster; | |
1031 | if (n > nb_sectors) { | |
1032 | n = nb_sectors; | |
1033 | } | |
630530a6 | 1034 | |
7fa60fa3 | 1035 | ret = bdrv_pwrite(extent->file, |
b3976d3c | 1036 | cluster_offset + index_in_cluster * 512, |
7fa60fa3 FZ |
1037 | buf, |
1038 | n * 512); | |
1039 | if (ret < 0) { | |
1040 | return ret; | |
b3976d3c | 1041 | } |
630530a6 TS |
1042 | if (m_data.valid) { |
1043 | /* update L2 tables */ | |
b3976d3c | 1044 | if (vmdk_L2update(extent, &m_data) == -1) { |
7fa60fa3 | 1045 | return -EIO; |
b3976d3c | 1046 | } |
630530a6 | 1047 | } |
ff1afc72 FB |
1048 | nb_sectors -= n; |
1049 | sector_num += n; | |
1050 | buf += n * 512; | |
5f4da8c0 TS |
1051 | |
1052 | // update CID on the first write every time the virtual disk is opened | |
69b4d86d | 1053 | if (!s->cid_updated) { |
5f4da8c0 | 1054 | vmdk_write_cid(bs, time(NULL)); |
69b4d86d | 1055 | s->cid_updated = true; |
5f4da8c0 | 1056 | } |
ff1afc72 FB |
1057 | } |
1058 | return 0; | |
ea2384d3 FB |
1059 | } |
1060 | ||
0e7e1989 | 1061 | static int vmdk_create(const char *filename, QEMUOptionParameter *options) |
8979b227 FB |
1062 | { |
1063 | int fd, i; | |
1064 | VMDK4Header header; | |
1065 | uint32_t tmp, magic, grains, gd_size, gt_size, gt_count; | |
7ccfb2eb | 1066 | static const char desc_template[] = |
8979b227 FB |
1067 | "# Disk DescriptorFile\n" |
1068 | "version=1\n" | |
1069 | "CID=%x\n" | |
1070 | "parentCID=ffffffff\n" | |
1071 | "createType=\"monolithicSparse\"\n" | |
1072 | "\n" | |
1073 | "# Extent description\n" | |
7fd6d9fc | 1074 | "RW %" PRId64 " SPARSE \"%s\"\n" |
8979b227 FB |
1075 | "\n" |
1076 | "# The Disk Data Base \n" | |
1077 | "#DDB\n" | |
1078 | "\n" | |
ec36ba14 | 1079 | "ddb.virtualHWVersion = \"%d\"\n" |
7fd6d9fc | 1080 | "ddb.geometry.cylinders = \"%" PRId64 "\"\n" |
8979b227 FB |
1081 | "ddb.geometry.heads = \"16\"\n" |
1082 | "ddb.geometry.sectors = \"63\"\n" | |
1083 | "ddb.adapterType = \"ide\"\n"; | |
1084 | char desc[1024]; | |
1085 | const char *real_filename, *temp_str; | |
0e7e1989 KW |
1086 | int64_t total_size = 0; |
1087 | const char *backing_file = NULL; | |
1088 | int flags = 0; | |
1640366c | 1089 | int ret; |
0e7e1989 KW |
1090 | |
1091 | // Read out options | |
1092 | while (options && options->name) { | |
1093 | if (!strcmp(options->name, BLOCK_OPT_SIZE)) { | |
1094 | total_size = options->value.n / 512; | |
1095 | } else if (!strcmp(options->name, BLOCK_OPT_BACKING_FILE)) { | |
1096 | backing_file = options->value.s; | |
1097 | } else if (!strcmp(options->name, BLOCK_OPT_COMPAT6)) { | |
1098 | flags |= options->value.n ? BLOCK_FLAG_COMPAT6: 0; | |
1099 | } | |
1100 | options++; | |
1101 | } | |
8979b227 FB |
1102 | |
1103 | /* XXX: add support for backing file */ | |
5f4da8c0 TS |
1104 | if (backing_file) { |
1105 | return vmdk_snapshot_create(filename, backing_file); | |
1106 | } | |
8979b227 FB |
1107 | |
1108 | fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE, | |
1109 | 0644); | |
1110 | if (fd < 0) | |
b781cce5 | 1111 | return -errno; |
8979b227 FB |
1112 | magic = cpu_to_be32(VMDK4_MAGIC); |
1113 | memset(&header, 0, sizeof(header)); | |
16372ff0 AG |
1114 | header.version = 1; |
1115 | header.flags = 3; /* ?? */ | |
1116 | header.capacity = total_size; | |
1117 | header.granularity = 128; | |
1118 | header.num_gtes_per_gte = 512; | |
8979b227 FB |
1119 | |
1120 | grains = (total_size + header.granularity - 1) / header.granularity; | |
1121 | gt_size = ((header.num_gtes_per_gte * sizeof(uint32_t)) + 511) >> 9; | |
1122 | gt_count = (grains + header.num_gtes_per_gte - 1) / header.num_gtes_per_gte; | |
1123 | gd_size = (gt_count * sizeof(uint32_t) + 511) >> 9; | |
1124 | ||
1125 | header.desc_offset = 1; | |
1126 | header.desc_size = 20; | |
1127 | header.rgd_offset = header.desc_offset + header.desc_size; | |
1128 | header.gd_offset = header.rgd_offset + gd_size + (gt_size * gt_count); | |
1129 | header.grain_offset = | |
1130 | ((header.gd_offset + gd_size + (gt_size * gt_count) + | |
1131 | header.granularity - 1) / header.granularity) * | |
1132 | header.granularity; | |
1133 | ||
16372ff0 AG |
1134 | /* swap endianness for all header fields */ |
1135 | header.version = cpu_to_le32(header.version); | |
1136 | header.flags = cpu_to_le32(header.flags); | |
1137 | header.capacity = cpu_to_le64(header.capacity); | |
1138 | header.granularity = cpu_to_le64(header.granularity); | |
1139 | header.num_gtes_per_gte = cpu_to_le32(header.num_gtes_per_gte); | |
8979b227 FB |
1140 | header.desc_offset = cpu_to_le64(header.desc_offset); |
1141 | header.desc_size = cpu_to_le64(header.desc_size); | |
1142 | header.rgd_offset = cpu_to_le64(header.rgd_offset); | |
1143 | header.gd_offset = cpu_to_le64(header.gd_offset); | |
1144 | header.grain_offset = cpu_to_le64(header.grain_offset); | |
1145 | ||
1146 | header.check_bytes[0] = 0xa; | |
1147 | header.check_bytes[1] = 0x20; | |
1148 | header.check_bytes[2] = 0xd; | |
1149 | header.check_bytes[3] = 0xa; | |
3b46e624 TS |
1150 | |
1151 | /* write all the data */ | |
1640366c KS |
1152 | ret = qemu_write_full(fd, &magic, sizeof(magic)); |
1153 | if (ret != sizeof(magic)) { | |
b781cce5 | 1154 | ret = -errno; |
1640366c KS |
1155 | goto exit; |
1156 | } | |
1157 | ret = qemu_write_full(fd, &header, sizeof(header)); | |
1158 | if (ret != sizeof(header)) { | |
b781cce5 | 1159 | ret = -errno; |
1640366c KS |
1160 | goto exit; |
1161 | } | |
8979b227 | 1162 | |
16372ff0 | 1163 | ret = ftruncate(fd, le64_to_cpu(header.grain_offset) << 9); |
1640366c | 1164 | if (ret < 0) { |
b781cce5 | 1165 | ret = -errno; |
1640366c KS |
1166 | goto exit; |
1167 | } | |
8979b227 FB |
1168 | |
1169 | /* write grain directory */ | |
1170 | lseek(fd, le64_to_cpu(header.rgd_offset) << 9, SEEK_SET); | |
16372ff0 | 1171 | for (i = 0, tmp = le64_to_cpu(header.rgd_offset) + gd_size; |
1640366c KS |
1172 | i < gt_count; i++, tmp += gt_size) { |
1173 | ret = qemu_write_full(fd, &tmp, sizeof(tmp)); | |
1174 | if (ret != sizeof(tmp)) { | |
b781cce5 | 1175 | ret = -errno; |
1640366c KS |
1176 | goto exit; |
1177 | } | |
1178 | } | |
3b46e624 | 1179 | |
8979b227 FB |
1180 | /* write backup grain directory */ |
1181 | lseek(fd, le64_to_cpu(header.gd_offset) << 9, SEEK_SET); | |
16372ff0 | 1182 | for (i = 0, tmp = le64_to_cpu(header.gd_offset) + gd_size; |
1640366c KS |
1183 | i < gt_count; i++, tmp += gt_size) { |
1184 | ret = qemu_write_full(fd, &tmp, sizeof(tmp)); | |
1185 | if (ret != sizeof(tmp)) { | |
b781cce5 | 1186 | ret = -errno; |
1640366c KS |
1187 | goto exit; |
1188 | } | |
1189 | } | |
8979b227 FB |
1190 | |
1191 | /* compose the descriptor */ | |
1192 | real_filename = filename; | |
1193 | if ((temp_str = strrchr(real_filename, '\\')) != NULL) | |
1194 | real_filename = temp_str + 1; | |
1195 | if ((temp_str = strrchr(real_filename, '/')) != NULL) | |
1196 | real_filename = temp_str + 1; | |
1197 | if ((temp_str = strrchr(real_filename, ':')) != NULL) | |
1198 | real_filename = temp_str + 1; | |
7ccfb2eb | 1199 | snprintf(desc, sizeof(desc), desc_template, (unsigned int)time(NULL), |
7fd6d9fc BS |
1200 | total_size, real_filename, |
1201 | (flags & BLOCK_FLAG_COMPAT6 ? 6 : 4), | |
1202 | total_size / (int64_t)(63 * 16)); | |
8979b227 FB |
1203 | |
1204 | /* write the descriptor */ | |
1205 | lseek(fd, le64_to_cpu(header.desc_offset) << 9, SEEK_SET); | |
1640366c KS |
1206 | ret = qemu_write_full(fd, desc, strlen(desc)); |
1207 | if (ret != strlen(desc)) { | |
b781cce5 | 1208 | ret = -errno; |
1640366c KS |
1209 | goto exit; |
1210 | } | |
8979b227 | 1211 | |
1640366c KS |
1212 | ret = 0; |
1213 | exit: | |
8979b227 | 1214 | close(fd); |
1640366c | 1215 | return ret; |
8979b227 FB |
1216 | } |
1217 | ||
e2731add | 1218 | static void vmdk_close(BlockDriverState *bs) |
ea2384d3 | 1219 | { |
b3976d3c | 1220 | vmdk_free_extents(bs); |
ea2384d3 FB |
1221 | } |
1222 | ||
205ef796 | 1223 | static int vmdk_flush(BlockDriverState *bs) |
7a6cba61 | 1224 | { |
333c574d FZ |
1225 | int i, ret, err; |
1226 | BDRVVmdkState *s = bs->opaque; | |
1227 | ||
1228 | ret = bdrv_flush(bs->file); | |
1229 | for (i = 0; i < s->num_extents; i++) { | |
1230 | err = bdrv_flush(s->extents[i].file); | |
1231 | if (err < 0) { | |
1232 | ret = err; | |
1233 | } | |
1234 | } | |
1235 | return ret; | |
7a6cba61 PB |
1236 | } |
1237 | ||
0e7e1989 KW |
1238 | |
1239 | static QEMUOptionParameter vmdk_create_options[] = { | |
db08adf5 KW |
1240 | { |
1241 | .name = BLOCK_OPT_SIZE, | |
1242 | .type = OPT_SIZE, | |
1243 | .help = "Virtual disk size" | |
1244 | }, | |
1245 | { | |
1246 | .name = BLOCK_OPT_BACKING_FILE, | |
1247 | .type = OPT_STRING, | |
1248 | .help = "File name of a base image" | |
1249 | }, | |
1250 | { | |
1251 | .name = BLOCK_OPT_COMPAT6, | |
1252 | .type = OPT_FLAG, | |
1253 | .help = "VMDK version 6 image" | |
1254 | }, | |
0e7e1989 KW |
1255 | { NULL } |
1256 | }; | |
1257 | ||
5efa9d5a | 1258 | static BlockDriver bdrv_vmdk = { |
e60f469c AJ |
1259 | .format_name = "vmdk", |
1260 | .instance_size = sizeof(BDRVVmdkState), | |
1261 | .bdrv_probe = vmdk_probe, | |
6511ef77 | 1262 | .bdrv_open = vmdk_open, |
e60f469c AJ |
1263 | .bdrv_read = vmdk_read, |
1264 | .bdrv_write = vmdk_write, | |
1265 | .bdrv_close = vmdk_close, | |
1266 | .bdrv_create = vmdk_create, | |
1267 | .bdrv_flush = vmdk_flush, | |
1268 | .bdrv_is_allocated = vmdk_is_allocated, | |
0e7e1989 KW |
1269 | |
1270 | .create_options = vmdk_create_options, | |
ea2384d3 | 1271 | }; |
5efa9d5a AL |
1272 | |
1273 | static void bdrv_vmdk_init(void) | |
1274 | { | |
1275 | bdrv_register(&bdrv_vmdk); | |
1276 | } | |
1277 | ||
1278 | block_init(bdrv_vmdk_init); |