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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 | |
80c71a24 | 26 | #include "qemu/osdep.h" |
da34e65c | 27 | #include "qapi/error.h" |
737e150e | 28 | #include "block/block_int.h" |
c4bea169 | 29 | #include "sysemu/block-backend.h" |
abc521a9 | 30 | #include "qapi/qmp/qdict.h" |
cc7a8ea7 | 31 | #include "qapi/qmp/qerror.h" |
d49b6836 | 32 | #include "qemu/error-report.h" |
1de7afc9 | 33 | #include "qemu/module.h" |
922a01a0 | 34 | #include "qemu/option.h" |
58369e22 | 35 | #include "qemu/bswap.h" |
795c40b8 | 36 | #include "migration/blocker.h" |
f348b6d1 | 37 | #include "qemu/cutils.h" |
2923d34f | 38 | #include <zlib.h> |
ea2384d3 | 39 | |
ea2384d3 FB |
40 | #define VMDK3_MAGIC (('C' << 24) | ('O' << 16) | ('W' << 8) | 'D') |
41 | #define VMDK4_MAGIC (('K' << 24) | ('D' << 16) | ('M' << 8) | 'V') | |
432bb170 | 42 | #define VMDK4_COMPRESSION_DEFLATE 1 |
95b0aa42 | 43 | #define VMDK4_FLAG_NL_DETECT (1 << 0) |
bb45ded9 | 44 | #define VMDK4_FLAG_RGD (1 << 1) |
14ead646 FZ |
45 | /* Zeroed-grain enable bit */ |
46 | #define VMDK4_FLAG_ZERO_GRAIN (1 << 2) | |
432bb170 FZ |
47 | #define VMDK4_FLAG_COMPRESS (1 << 16) |
48 | #define VMDK4_FLAG_MARKER (1 << 17) | |
65bd155c | 49 | #define VMDK4_GD_AT_END 0xffffffffffffffffULL |
ea2384d3 | 50 | |
a77672ea YCL |
51 | #define VMDK_EXTENT_MAX_SECTORS (1ULL << 32) |
52 | ||
14ead646 | 53 | #define VMDK_GTE_ZEROED 0x1 |
65f74725 FZ |
54 | |
55 | /* VMDK internal error codes */ | |
56 | #define VMDK_OK 0 | |
57 | #define VMDK_ERROR (-1) | |
58 | /* Cluster not allocated */ | |
59 | #define VMDK_UNALLOC (-2) | |
60 | #define VMDK_ZEROED (-3) | |
61 | ||
69e0b6df | 62 | #define BLOCK_OPT_ZEROED_GRAIN "zeroed_grain" |
f3d43dfd | 63 | #define BLOCK_OPT_TOOLSVERSION "toolsversion" |
69e0b6df | 64 | |
ea2384d3 FB |
65 | typedef struct { |
66 | uint32_t version; | |
67 | uint32_t flags; | |
68 | uint32_t disk_sectors; | |
69 | uint32_t granularity; | |
70 | uint32_t l1dir_offset; | |
71 | uint32_t l1dir_size; | |
72 | uint32_t file_sectors; | |
73 | uint32_t cylinders; | |
74 | uint32_t heads; | |
75 | uint32_t sectors_per_track; | |
5d8caa54 | 76 | } QEMU_PACKED VMDK3Header; |
ea2384d3 FB |
77 | |
78 | typedef struct { | |
79 | uint32_t version; | |
80 | uint32_t flags; | |
e98768d4 FZ |
81 | uint64_t capacity; |
82 | uint64_t granularity; | |
83 | uint64_t desc_offset; | |
84 | uint64_t desc_size; | |
ca8804ce FZ |
85 | /* Number of GrainTableEntries per GrainTable */ |
86 | uint32_t num_gtes_per_gt; | |
e98768d4 FZ |
87 | uint64_t rgd_offset; |
88 | uint64_t gd_offset; | |
89 | uint64_t grain_offset; | |
ea2384d3 FB |
90 | char filler[1]; |
91 | char check_bytes[4]; | |
432bb170 | 92 | uint16_t compressAlgorithm; |
541dc0d4 | 93 | } QEMU_PACKED VMDK4Header; |
ea2384d3 | 94 | |
98eb9733 SE |
95 | typedef struct VMDKSESparseConstHeader { |
96 | uint64_t magic; | |
97 | uint64_t version; | |
98 | uint64_t capacity; | |
99 | uint64_t grain_size; | |
100 | uint64_t grain_table_size; | |
101 | uint64_t flags; | |
102 | uint64_t reserved1; | |
103 | uint64_t reserved2; | |
104 | uint64_t reserved3; | |
105 | uint64_t reserved4; | |
106 | uint64_t volatile_header_offset; | |
107 | uint64_t volatile_header_size; | |
108 | uint64_t journal_header_offset; | |
109 | uint64_t journal_header_size; | |
110 | uint64_t journal_offset; | |
111 | uint64_t journal_size; | |
112 | uint64_t grain_dir_offset; | |
113 | uint64_t grain_dir_size; | |
114 | uint64_t grain_tables_offset; | |
115 | uint64_t grain_tables_size; | |
116 | uint64_t free_bitmap_offset; | |
117 | uint64_t free_bitmap_size; | |
118 | uint64_t backmap_offset; | |
119 | uint64_t backmap_size; | |
120 | uint64_t grains_offset; | |
121 | uint64_t grains_size; | |
122 | uint8_t pad[304]; | |
123 | } QEMU_PACKED VMDKSESparseConstHeader; | |
124 | ||
125 | typedef struct VMDKSESparseVolatileHeader { | |
126 | uint64_t magic; | |
127 | uint64_t free_gt_number; | |
128 | uint64_t next_txn_seq_number; | |
129 | uint64_t replay_journal; | |
130 | uint8_t pad[480]; | |
131 | } QEMU_PACKED VMDKSESparseVolatileHeader; | |
132 | ||
ea2384d3 FB |
133 | #define L2_CACHE_SIZE 16 |
134 | ||
b3976d3c | 135 | typedef struct VmdkExtent { |
24bc15d1 | 136 | BdrvChild *file; |
b3976d3c | 137 | bool flat; |
432bb170 FZ |
138 | bool compressed; |
139 | bool has_marker; | |
14ead646 | 140 | bool has_zero_grain; |
98eb9733 SE |
141 | bool sesparse; |
142 | uint64_t sesparse_l2_tables_offset; | |
143 | uint64_t sesparse_clusters_offset; | |
144 | int32_t entry_size; | |
14ead646 | 145 | int version; |
b3976d3c FZ |
146 | int64_t sectors; |
147 | int64_t end_sector; | |
7fa60fa3 | 148 | int64_t flat_start_offset; |
ea2384d3 | 149 | int64_t l1_table_offset; |
ff1afc72 | 150 | int64_t l1_backup_table_offset; |
98eb9733 | 151 | void *l1_table; |
ff1afc72 | 152 | uint32_t *l1_backup_table; |
ea2384d3 FB |
153 | unsigned int l1_size; |
154 | uint32_t l1_entry_sectors; | |
155 | ||
156 | unsigned int l2_size; | |
98eb9733 | 157 | void *l2_cache; |
ea2384d3 FB |
158 | uint32_t l2_cache_offsets[L2_CACHE_SIZE]; |
159 | uint32_t l2_cache_counts[L2_CACHE_SIZE]; | |
160 | ||
301c7d38 | 161 | int64_t cluster_sectors; |
c6ac36e1 | 162 | int64_t next_cluster_sector; |
f4c129a3 | 163 | char *type; |
b3976d3c FZ |
164 | } VmdkExtent; |
165 | ||
166 | typedef struct BDRVVmdkState { | |
848c66e8 | 167 | CoMutex lock; |
e98768d4 | 168 | uint64_t desc_offset; |
69b4d86d | 169 | bool cid_updated; |
c338b6ad | 170 | bool cid_checked; |
f4c129a3 | 171 | uint32_t cid; |
5f4da8c0 | 172 | uint32_t parent_cid; |
b3976d3c FZ |
173 | int num_extents; |
174 | /* Extent array with num_extents entries, ascend ordered by address */ | |
175 | VmdkExtent *extents; | |
2bc3166c | 176 | Error *migration_blocker; |
f4c129a3 | 177 | char *create_type; |
ea2384d3 FB |
178 | } BDRVVmdkState; |
179 | ||
630530a6 | 180 | typedef struct VmdkMetaData { |
630530a6 TS |
181 | unsigned int l1_index; |
182 | unsigned int l2_index; | |
183 | unsigned int l2_offset; | |
4dc20e64 | 184 | bool new_allocation; |
cdeaf1f1 | 185 | uint32_t *l2_cache_entry; |
630530a6 TS |
186 | } VmdkMetaData; |
187 | ||
432bb170 FZ |
188 | typedef struct VmdkGrainMarker { |
189 | uint64_t lba; | |
190 | uint32_t size; | |
880a7817 | 191 | uint8_t data[]; |
5d8caa54 | 192 | } QEMU_PACKED VmdkGrainMarker; |
432bb170 | 193 | |
65bd155c KW |
194 | enum { |
195 | MARKER_END_OF_STREAM = 0, | |
196 | MARKER_GRAIN_TABLE = 1, | |
197 | MARKER_GRAIN_DIRECTORY = 2, | |
198 | MARKER_FOOTER = 3, | |
199 | }; | |
200 | ||
ea2384d3 FB |
201 | static int vmdk_probe(const uint8_t *buf, int buf_size, const char *filename) |
202 | { | |
203 | uint32_t magic; | |
204 | ||
ae261c86 | 205 | if (buf_size < 4) { |
ea2384d3 | 206 | return 0; |
ae261c86 | 207 | } |
ea2384d3 FB |
208 | magic = be32_to_cpu(*(uint32_t *)buf); |
209 | if (magic == VMDK3_MAGIC || | |
01fc99d6 | 210 | magic == VMDK4_MAGIC) { |
ea2384d3 | 211 | return 100; |
01fc99d6 FZ |
212 | } else { |
213 | const char *p = (const char *)buf; | |
214 | const char *end = p + buf_size; | |
215 | while (p < end) { | |
216 | if (*p == '#') { | |
217 | /* skip comment line */ | |
218 | while (p < end && *p != '\n') { | |
219 | p++; | |
220 | } | |
221 | p++; | |
222 | continue; | |
223 | } | |
224 | if (*p == ' ') { | |
225 | while (p < end && *p == ' ') { | |
226 | p++; | |
227 | } | |
228 | /* skip '\r' if windows line endings used. */ | |
229 | if (p < end && *p == '\r') { | |
230 | p++; | |
231 | } | |
232 | /* only accept blank lines before 'version=' line */ | |
233 | if (p == end || *p != '\n') { | |
234 | return 0; | |
235 | } | |
236 | p++; | |
237 | continue; | |
238 | } | |
239 | if (end - p >= strlen("version=X\n")) { | |
240 | if (strncmp("version=1\n", p, strlen("version=1\n")) == 0 || | |
b69864e5 SE |
241 | strncmp("version=2\n", p, strlen("version=2\n")) == 0 || |
242 | strncmp("version=3\n", p, strlen("version=3\n")) == 0) { | |
01fc99d6 FZ |
243 | return 100; |
244 | } | |
245 | } | |
246 | if (end - p >= strlen("version=X\r\n")) { | |
247 | if (strncmp("version=1\r\n", p, strlen("version=1\r\n")) == 0 || | |
b69864e5 SE |
248 | strncmp("version=2\r\n", p, strlen("version=2\r\n")) == 0 || |
249 | strncmp("version=3\r\n", p, strlen("version=3\r\n")) == 0) { | |
01fc99d6 FZ |
250 | return 100; |
251 | } | |
252 | } | |
253 | return 0; | |
254 | } | |
ea2384d3 | 255 | return 0; |
01fc99d6 | 256 | } |
ea2384d3 FB |
257 | } |
258 | ||
3b46e624 | 259 | #define SECTOR_SIZE 512 |
f66fd6c3 FZ |
260 | #define DESC_SIZE (20 * SECTOR_SIZE) /* 20 sectors of 512 bytes each */ |
261 | #define BUF_SIZE 4096 | |
262 | #define HEADER_SIZE 512 /* first sector of 512 bytes */ | |
5f4da8c0 | 263 | |
b3976d3c FZ |
264 | static void vmdk_free_extents(BlockDriverState *bs) |
265 | { | |
266 | int i; | |
267 | BDRVVmdkState *s = bs->opaque; | |
b3c0bfb6 | 268 | VmdkExtent *e; |
b3976d3c FZ |
269 | |
270 | for (i = 0; i < s->num_extents; i++) { | |
b3c0bfb6 FZ |
271 | e = &s->extents[i]; |
272 | g_free(e->l1_table); | |
273 | g_free(e->l2_cache); | |
274 | g_free(e->l1_backup_table); | |
f4c129a3 | 275 | g_free(e->type); |
9a4f4c31 | 276 | if (e->file != bs->file) { |
24bc15d1 | 277 | bdrv_unref_child(bs, e->file); |
b3c0bfb6 | 278 | } |
b3976d3c | 279 | } |
7267c094 | 280 | g_free(s->extents); |
b3976d3c FZ |
281 | } |
282 | ||
86c6b429 FZ |
283 | static void vmdk_free_last_extent(BlockDriverState *bs) |
284 | { | |
285 | BDRVVmdkState *s = bs->opaque; | |
286 | ||
287 | if (s->num_extents == 0) { | |
288 | return; | |
289 | } | |
290 | s->num_extents--; | |
5839e53b | 291 | s->extents = g_renew(VmdkExtent, s->extents, s->num_extents); |
86c6b429 FZ |
292 | } |
293 | ||
9877860e PM |
294 | /* Return -ve errno, or 0 on success and write CID into *pcid. */ |
295 | static int vmdk_read_cid(BlockDriverState *bs, int parent, uint32_t *pcid) | |
ea2384d3 | 296 | { |
5997c210 | 297 | char *desc; |
9877860e | 298 | uint32_t cid; |
7ccfb2eb | 299 | const char *p_name, *cid_str; |
5f4da8c0 | 300 | size_t cid_str_size; |
e1da9b24 | 301 | BDRVVmdkState *s = bs->opaque; |
99f1835d | 302 | int ret; |
5f4da8c0 | 303 | |
5997c210 | 304 | desc = g_malloc0(DESC_SIZE); |
cf2ab8fc | 305 | ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE); |
99f1835d | 306 | if (ret < 0) { |
9877860e | 307 | goto out; |
e1da9b24 | 308 | } |
5f4da8c0 TS |
309 | |
310 | if (parent) { | |
311 | cid_str = "parentCID"; | |
312 | cid_str_size = sizeof("parentCID"); | |
313 | } else { | |
314 | cid_str = "CID"; | |
315 | cid_str_size = sizeof("CID"); | |
316 | } | |
317 | ||
93897b9f | 318 | desc[DESC_SIZE - 1] = '\0'; |
ae261c86 | 319 | p_name = strstr(desc, cid_str); |
9877860e PM |
320 | if (p_name == NULL) { |
321 | ret = -EINVAL; | |
322 | goto out; | |
5f4da8c0 | 323 | } |
9877860e PM |
324 | p_name += cid_str_size; |
325 | if (sscanf(p_name, "%" SCNx32, &cid) != 1) { | |
326 | ret = -EINVAL; | |
327 | goto out; | |
328 | } | |
329 | *pcid = cid; | |
330 | ret = 0; | |
5f4da8c0 | 331 | |
9877860e | 332 | out: |
5997c210 | 333 | g_free(desc); |
9877860e | 334 | return ret; |
5f4da8c0 TS |
335 | } |
336 | ||
337 | static int vmdk_write_cid(BlockDriverState *bs, uint32_t cid) | |
338 | { | |
965415eb | 339 | char *desc, *tmp_desc; |
5f4da8c0 | 340 | char *p_name, *tmp_str; |
e1da9b24 | 341 | BDRVVmdkState *s = bs->opaque; |
965415eb | 342 | int ret = 0; |
5f4da8c0 | 343 | |
965415eb FZ |
344 | desc = g_malloc0(DESC_SIZE); |
345 | tmp_desc = g_malloc0(DESC_SIZE); | |
cf2ab8fc | 346 | ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE); |
99f1835d | 347 | if (ret < 0) { |
965415eb | 348 | goto out; |
e1da9b24 | 349 | } |
5f4da8c0 | 350 | |
93897b9f | 351 | desc[DESC_SIZE - 1] = '\0'; |
ae261c86 | 352 | tmp_str = strstr(desc, "parentCID"); |
93897b9f | 353 | if (tmp_str == NULL) { |
965415eb FZ |
354 | ret = -EINVAL; |
355 | goto out; | |
93897b9f KW |
356 | } |
357 | ||
965415eb | 358 | pstrcpy(tmp_desc, DESC_SIZE, tmp_str); |
ae261c86 FZ |
359 | p_name = strstr(desc, "CID"); |
360 | if (p_name != NULL) { | |
5f4da8c0 | 361 | p_name += sizeof("CID"); |
965415eb FZ |
362 | snprintf(p_name, DESC_SIZE - (p_name - desc), "%" PRIx32 "\n", cid); |
363 | pstrcat(desc, DESC_SIZE, tmp_desc); | |
5f4da8c0 TS |
364 | } |
365 | ||
d9ca2ea2 | 366 | ret = bdrv_pwrite_sync(bs->file, s->desc_offset, desc, DESC_SIZE); |
99f1835d | 367 | |
965415eb FZ |
368 | out: |
369 | g_free(desc); | |
370 | g_free(tmp_desc); | |
371 | return ret; | |
5f4da8c0 TS |
372 | } |
373 | ||
374 | static int vmdk_is_cid_valid(BlockDriverState *bs) | |
375 | { | |
5f4da8c0 | 376 | BDRVVmdkState *s = bs->opaque; |
5f4da8c0 TS |
377 | uint32_t cur_pcid; |
378 | ||
760e0063 KW |
379 | if (!s->cid_checked && bs->backing) { |
380 | BlockDriverState *p_bs = bs->backing->bs; | |
381 | ||
439e89fc HR |
382 | if (strcmp(p_bs->drv->format_name, "vmdk")) { |
383 | /* Backing file is not in vmdk format, so it does not have | |
384 | * a CID, which makes the overlay's parent CID invalid */ | |
385 | return 0; | |
386 | } | |
387 | ||
9877860e PM |
388 | if (vmdk_read_cid(p_bs, 0, &cur_pcid) != 0) { |
389 | /* read failure: report as not valid */ | |
390 | return 0; | |
391 | } | |
ae261c86 FZ |
392 | if (s->parent_cid != cur_pcid) { |
393 | /* CID not valid */ | |
5f4da8c0 | 394 | return 0; |
ae261c86 | 395 | } |
5f4da8c0 | 396 | } |
c338b6ad | 397 | s->cid_checked = true; |
ae261c86 | 398 | /* CID valid */ |
5f4da8c0 TS |
399 | return 1; |
400 | } | |
401 | ||
67251a31 | 402 | /* We have nothing to do for VMDK reopen, stubs just return success */ |
3897575f JC |
403 | static int vmdk_reopen_prepare(BDRVReopenState *state, |
404 | BlockReopenQueue *queue, Error **errp) | |
405 | { | |
3897575f JC |
406 | assert(state != NULL); |
407 | assert(state->bs != NULL); | |
67251a31 | 408 | return 0; |
3897575f JC |
409 | } |
410 | ||
9949f97e | 411 | static int vmdk_parent_open(BlockDriverState *bs) |
5f4da8c0 | 412 | { |
5fafdf24 | 413 | char *p_name; |
71968dbf | 414 | char *desc; |
e1da9b24 | 415 | BDRVVmdkState *s = bs->opaque; |
588b65a3 | 416 | int ret; |
5f4da8c0 | 417 | |
71968dbf | 418 | desc = g_malloc0(DESC_SIZE + 1); |
cf2ab8fc | 419 | ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE); |
588b65a3 | 420 | if (ret < 0) { |
71968dbf | 421 | goto out; |
e1da9b24 | 422 | } |
71968dbf | 423 | ret = 0; |
5f4da8c0 | 424 | |
ae261c86 FZ |
425 | p_name = strstr(desc, "parentFileNameHint"); |
426 | if (p_name != NULL) { | |
5f4da8c0 | 427 | char *end_name; |
5f4da8c0 TS |
428 | |
429 | p_name += sizeof("parentFileNameHint") + 1; | |
ae261c86 FZ |
430 | end_name = strchr(p_name, '\"'); |
431 | if (end_name == NULL) { | |
71968dbf FZ |
432 | ret = -EINVAL; |
433 | goto out; | |
ae261c86 | 434 | } |
998c2019 | 435 | if ((end_name - p_name) > sizeof(bs->auto_backing_file) - 1) { |
71968dbf FZ |
436 | ret = -EINVAL; |
437 | goto out; | |
ae261c86 | 438 | } |
3b46e624 | 439 | |
998c2019 HR |
440 | pstrcpy(bs->auto_backing_file, end_name - p_name + 1, p_name); |
441 | pstrcpy(bs->backing_file, sizeof(bs->backing_file), | |
442 | bs->auto_backing_file); | |
7502be83 SE |
443 | pstrcpy(bs->backing_format, sizeof(bs->backing_format), |
444 | "vmdk"); | |
ff1afc72 | 445 | } |
5f4da8c0 | 446 | |
71968dbf FZ |
447 | out: |
448 | g_free(desc); | |
449 | return ret; | |
5f4da8c0 TS |
450 | } |
451 | ||
b3976d3c FZ |
452 | /* Create and append extent to the extent array. Return the added VmdkExtent |
453 | * address. return NULL if allocation failed. */ | |
8aa1331c | 454 | static int vmdk_add_extent(BlockDriverState *bs, |
24bc15d1 | 455 | BdrvChild *file, bool flat, int64_t sectors, |
b3976d3c FZ |
456 | int64_t l1_offset, int64_t l1_backup_offset, |
457 | uint32_t l1_size, | |
8aa1331c | 458 | int l2_size, uint64_t cluster_sectors, |
4823970b FZ |
459 | VmdkExtent **new_extent, |
460 | Error **errp) | |
b3976d3c FZ |
461 | { |
462 | VmdkExtent *extent; | |
463 | BDRVVmdkState *s = bs->opaque; | |
0a156f7c | 464 | int64_t nb_sectors; |
b3976d3c | 465 | |
8aa1331c FZ |
466 | if (cluster_sectors > 0x200000) { |
467 | /* 0x200000 * 512Bytes = 1GB for one cluster is unrealistic */ | |
4823970b FZ |
468 | error_setg(errp, "Invalid granularity, image may be corrupt"); |
469 | return -EFBIG; | |
8aa1331c | 470 | } |
59d6ee48 | 471 | if (l1_size > 32 * 1024 * 1024) { |
940a2cd5 SE |
472 | /* |
473 | * Although with big capacity and small l1_entry_sectors, we can get a | |
b0651b8c | 474 | * big l1_size, we don't want unbounded value to allocate the table. |
59d6ee48 SE |
475 | * Limit it to 32M, which is enough to store: |
476 | * 8TB - for both VMDK3 & VMDK4 with | |
477 | * minimal cluster size: 512B | |
478 | * minimal L2 table size: 512 entries | |
479 | * 8 TB is still more than the maximal value supported for | |
480 | * VMDK3 & VMDK4 which is 2TB. | |
98eb9733 SE |
481 | * 64TB - for "ESXi seSparse Extent" |
482 | * minimal cluster size: 512B (default is 4KB) | |
483 | * L2 table size: 4096 entries (const). | |
484 | * 64TB is more than the maximal value supported for | |
485 | * seSparse VMDKs (which is slightly less than 64TB) | |
940a2cd5 | 486 | */ |
4823970b | 487 | error_setg(errp, "L1 size too big"); |
b0651b8c FZ |
488 | return -EFBIG; |
489 | } | |
8aa1331c | 490 | |
24bc15d1 | 491 | nb_sectors = bdrv_nb_sectors(file->bs); |
0a156f7c MA |
492 | if (nb_sectors < 0) { |
493 | return nb_sectors; | |
c6ac36e1 FZ |
494 | } |
495 | ||
5839e53b | 496 | s->extents = g_renew(VmdkExtent, s->extents, s->num_extents + 1); |
b3976d3c FZ |
497 | extent = &s->extents[s->num_extents]; |
498 | s->num_extents++; | |
499 | ||
500 | memset(extent, 0, sizeof(VmdkExtent)); | |
501 | extent->file = file; | |
502 | extent->flat = flat; | |
503 | extent->sectors = sectors; | |
504 | extent->l1_table_offset = l1_offset; | |
505 | extent->l1_backup_table_offset = l1_backup_offset; | |
506 | extent->l1_size = l1_size; | |
507 | extent->l1_entry_sectors = l2_size * cluster_sectors; | |
508 | extent->l2_size = l2_size; | |
301c7d38 | 509 | extent->cluster_sectors = flat ? sectors : cluster_sectors; |
0a156f7c | 510 | extent->next_cluster_sector = ROUND_UP(nb_sectors, cluster_sectors); |
98eb9733 | 511 | extent->entry_size = sizeof(uint32_t); |
b3976d3c FZ |
512 | |
513 | if (s->num_extents > 1) { | |
514 | extent->end_sector = (*(extent - 1)).end_sector + extent->sectors; | |
515 | } else { | |
516 | extent->end_sector = extent->sectors; | |
517 | } | |
518 | bs->total_sectors = extent->end_sector; | |
8aa1331c FZ |
519 | if (new_extent) { |
520 | *new_extent = extent; | |
521 | } | |
522 | return 0; | |
b3976d3c FZ |
523 | } |
524 | ||
4823970b FZ |
525 | static int vmdk_init_tables(BlockDriverState *bs, VmdkExtent *extent, |
526 | Error **errp) | |
5f4da8c0 | 527 | { |
b4b3ab14 | 528 | int ret; |
13c4941c FZ |
529 | size_t l1_size; |
530 | int i; | |
5f4da8c0 | 531 | |
ea2384d3 | 532 | /* read the L1 table */ |
98eb9733 | 533 | l1_size = extent->l1_size * extent->entry_size; |
d6e59931 KW |
534 | extent->l1_table = g_try_malloc(l1_size); |
535 | if (l1_size && extent->l1_table == NULL) { | |
536 | return -ENOMEM; | |
537 | } | |
538 | ||
cf2ab8fc | 539 | ret = bdrv_pread(extent->file, |
4823970b FZ |
540 | extent->l1_table_offset, |
541 | extent->l1_table, | |
542 | l1_size); | |
b4b3ab14 | 543 | if (ret < 0) { |
f30c66ba | 544 | bdrv_refresh_filename(extent->file->bs); |
4823970b FZ |
545 | error_setg_errno(errp, -ret, |
546 | "Could not read l1 table from extent '%s'", | |
24bc15d1 | 547 | extent->file->bs->filename); |
b4b3ab14 | 548 | goto fail_l1; |
b3976d3c FZ |
549 | } |
550 | for (i = 0; i < extent->l1_size; i++) { | |
98eb9733 SE |
551 | if (extent->entry_size == sizeof(uint64_t)) { |
552 | le64_to_cpus((uint64_t *)extent->l1_table + i); | |
553 | } else { | |
554 | assert(extent->entry_size == sizeof(uint32_t)); | |
555 | le32_to_cpus((uint32_t *)extent->l1_table + i); | |
556 | } | |
ea2384d3 FB |
557 | } |
558 | ||
b3976d3c | 559 | if (extent->l1_backup_table_offset) { |
98eb9733 | 560 | assert(!extent->sesparse); |
d6e59931 KW |
561 | extent->l1_backup_table = g_try_malloc(l1_size); |
562 | if (l1_size && extent->l1_backup_table == NULL) { | |
563 | ret = -ENOMEM; | |
564 | goto fail_l1; | |
565 | } | |
cf2ab8fc | 566 | ret = bdrv_pread(extent->file, |
4823970b FZ |
567 | extent->l1_backup_table_offset, |
568 | extent->l1_backup_table, | |
569 | l1_size); | |
b4b3ab14 | 570 | if (ret < 0) { |
f30c66ba | 571 | bdrv_refresh_filename(extent->file->bs); |
4823970b FZ |
572 | error_setg_errno(errp, -ret, |
573 | "Could not read l1 backup table from extent '%s'", | |
24bc15d1 | 574 | extent->file->bs->filename); |
b4b3ab14 | 575 | goto fail_l1b; |
b3976d3c FZ |
576 | } |
577 | for (i = 0; i < extent->l1_size; i++) { | |
578 | le32_to_cpus(&extent->l1_backup_table[i]); | |
ff1afc72 FB |
579 | } |
580 | } | |
581 | ||
b3976d3c | 582 | extent->l2_cache = |
98eb9733 | 583 | g_malloc(extent->entry_size * extent->l2_size * L2_CACHE_SIZE); |
ea2384d3 | 584 | return 0; |
b4b3ab14 | 585 | fail_l1b: |
7267c094 | 586 | g_free(extent->l1_backup_table); |
b4b3ab14 | 587 | fail_l1: |
7267c094 | 588 | g_free(extent->l1_table); |
b4b3ab14 FZ |
589 | return ret; |
590 | } | |
591 | ||
daac8fdc | 592 | static int vmdk_open_vmfs_sparse(BlockDriverState *bs, |
24bc15d1 | 593 | BdrvChild *file, |
4823970b | 594 | int flags, Error **errp) |
b4b3ab14 FZ |
595 | { |
596 | int ret; | |
597 | uint32_t magic; | |
598 | VMDK3Header header; | |
cd466702 | 599 | VmdkExtent *extent = NULL; |
b4b3ab14 | 600 | |
cf2ab8fc | 601 | ret = bdrv_pread(file, sizeof(magic), &header, sizeof(header)); |
b4b3ab14 | 602 | if (ret < 0) { |
f30c66ba | 603 | bdrv_refresh_filename(file->bs); |
4823970b FZ |
604 | error_setg_errno(errp, -ret, |
605 | "Could not read header from file '%s'", | |
24bc15d1 | 606 | file->bs->filename); |
86c6b429 | 607 | return ret; |
b4b3ab14 | 608 | } |
f6b61e54 FZ |
609 | ret = vmdk_add_extent(bs, file, false, |
610 | le32_to_cpu(header.disk_sectors), | |
7237aecd | 611 | (int64_t)le32_to_cpu(header.l1dir_offset) << 9, |
f6b61e54 FZ |
612 | 0, |
613 | le32_to_cpu(header.l1dir_size), | |
614 | 4096, | |
615 | le32_to_cpu(header.granularity), | |
4823970b FZ |
616 | &extent, |
617 | errp); | |
8aa1331c FZ |
618 | if (ret < 0) { |
619 | return ret; | |
620 | } | |
4823970b | 621 | ret = vmdk_init_tables(bs, extent, errp); |
b4b3ab14 | 622 | if (ret) { |
86c6b429 FZ |
623 | /* free extent allocated by vmdk_add_extent */ |
624 | vmdk_free_last_extent(bs); | |
b4b3ab14 | 625 | } |
b4b3ab14 FZ |
626 | return ret; |
627 | } | |
628 | ||
98eb9733 SE |
629 | #define SESPARSE_CONST_HEADER_MAGIC UINT64_C(0x00000000cafebabe) |
630 | #define SESPARSE_VOLATILE_HEADER_MAGIC UINT64_C(0x00000000cafecafe) | |
631 | ||
632 | /* Strict checks - format not officially documented */ | |
633 | static int check_se_sparse_const_header(VMDKSESparseConstHeader *header, | |
634 | Error **errp) | |
635 | { | |
636 | header->magic = le64_to_cpu(header->magic); | |
637 | header->version = le64_to_cpu(header->version); | |
638 | header->grain_size = le64_to_cpu(header->grain_size); | |
639 | header->grain_table_size = le64_to_cpu(header->grain_table_size); | |
640 | header->flags = le64_to_cpu(header->flags); | |
641 | header->reserved1 = le64_to_cpu(header->reserved1); | |
642 | header->reserved2 = le64_to_cpu(header->reserved2); | |
643 | header->reserved3 = le64_to_cpu(header->reserved3); | |
644 | header->reserved4 = le64_to_cpu(header->reserved4); | |
645 | ||
646 | header->volatile_header_offset = | |
647 | le64_to_cpu(header->volatile_header_offset); | |
648 | header->volatile_header_size = le64_to_cpu(header->volatile_header_size); | |
649 | ||
650 | header->journal_header_offset = le64_to_cpu(header->journal_header_offset); | |
651 | header->journal_header_size = le64_to_cpu(header->journal_header_size); | |
652 | ||
653 | header->journal_offset = le64_to_cpu(header->journal_offset); | |
654 | header->journal_size = le64_to_cpu(header->journal_size); | |
655 | ||
656 | header->grain_dir_offset = le64_to_cpu(header->grain_dir_offset); | |
657 | header->grain_dir_size = le64_to_cpu(header->grain_dir_size); | |
658 | ||
659 | header->grain_tables_offset = le64_to_cpu(header->grain_tables_offset); | |
660 | header->grain_tables_size = le64_to_cpu(header->grain_tables_size); | |
661 | ||
662 | header->free_bitmap_offset = le64_to_cpu(header->free_bitmap_offset); | |
663 | header->free_bitmap_size = le64_to_cpu(header->free_bitmap_size); | |
664 | ||
665 | header->backmap_offset = le64_to_cpu(header->backmap_offset); | |
666 | header->backmap_size = le64_to_cpu(header->backmap_size); | |
667 | ||
668 | header->grains_offset = le64_to_cpu(header->grains_offset); | |
669 | header->grains_size = le64_to_cpu(header->grains_size); | |
670 | ||
671 | if (header->magic != SESPARSE_CONST_HEADER_MAGIC) { | |
672 | error_setg(errp, "Bad const header magic: 0x%016" PRIx64, | |
673 | header->magic); | |
674 | return -EINVAL; | |
675 | } | |
676 | ||
677 | if (header->version != 0x0000000200000001) { | |
678 | error_setg(errp, "Unsupported version: 0x%016" PRIx64, | |
679 | header->version); | |
680 | return -ENOTSUP; | |
681 | } | |
682 | ||
683 | if (header->grain_size != 8) { | |
684 | error_setg(errp, "Unsupported grain size: %" PRIu64, | |
685 | header->grain_size); | |
686 | return -ENOTSUP; | |
687 | } | |
688 | ||
689 | if (header->grain_table_size != 64) { | |
690 | error_setg(errp, "Unsupported grain table size: %" PRIu64, | |
691 | header->grain_table_size); | |
692 | return -ENOTSUP; | |
693 | } | |
694 | ||
695 | if (header->flags != 0) { | |
696 | error_setg(errp, "Unsupported flags: 0x%016" PRIx64, | |
697 | header->flags); | |
698 | return -ENOTSUP; | |
699 | } | |
700 | ||
701 | if (header->reserved1 != 0 || header->reserved2 != 0 || | |
702 | header->reserved3 != 0 || header->reserved4 != 0) { | |
703 | error_setg(errp, "Unsupported reserved bits:" | |
704 | " 0x%016" PRIx64 " 0x%016" PRIx64 | |
705 | " 0x%016" PRIx64 " 0x%016" PRIx64, | |
706 | header->reserved1, header->reserved2, | |
707 | header->reserved3, header->reserved4); | |
708 | return -ENOTSUP; | |
709 | } | |
710 | ||
711 | /* check that padding is 0 */ | |
712 | if (!buffer_is_zero(header->pad, sizeof(header->pad))) { | |
713 | error_setg(errp, "Unsupported non-zero const header padding"); | |
714 | return -ENOTSUP; | |
715 | } | |
716 | ||
717 | return 0; | |
718 | } | |
719 | ||
720 | static int check_se_sparse_volatile_header(VMDKSESparseVolatileHeader *header, | |
721 | Error **errp) | |
722 | { | |
723 | header->magic = le64_to_cpu(header->magic); | |
724 | header->free_gt_number = le64_to_cpu(header->free_gt_number); | |
725 | header->next_txn_seq_number = le64_to_cpu(header->next_txn_seq_number); | |
726 | header->replay_journal = le64_to_cpu(header->replay_journal); | |
727 | ||
728 | if (header->magic != SESPARSE_VOLATILE_HEADER_MAGIC) { | |
729 | error_setg(errp, "Bad volatile header magic: 0x%016" PRIx64, | |
730 | header->magic); | |
731 | return -EINVAL; | |
732 | } | |
733 | ||
734 | if (header->replay_journal) { | |
735 | error_setg(errp, "Image is dirty, Replaying journal not supported"); | |
736 | return -ENOTSUP; | |
737 | } | |
738 | ||
739 | /* check that padding is 0 */ | |
740 | if (!buffer_is_zero(header->pad, sizeof(header->pad))) { | |
741 | error_setg(errp, "Unsupported non-zero volatile header padding"); | |
742 | return -ENOTSUP; | |
743 | } | |
744 | ||
745 | return 0; | |
746 | } | |
747 | ||
748 | static int vmdk_open_se_sparse(BlockDriverState *bs, | |
749 | BdrvChild *file, | |
750 | int flags, Error **errp) | |
751 | { | |
752 | int ret; | |
753 | VMDKSESparseConstHeader const_header; | |
754 | VMDKSESparseVolatileHeader volatile_header; | |
cd466702 | 755 | VmdkExtent *extent = NULL; |
98eb9733 SE |
756 | |
757 | ret = bdrv_apply_auto_read_only(bs, | |
758 | "No write support for seSparse images available", errp); | |
759 | if (ret < 0) { | |
760 | return ret; | |
761 | } | |
762 | ||
763 | assert(sizeof(const_header) == SECTOR_SIZE); | |
764 | ||
765 | ret = bdrv_pread(file, 0, &const_header, sizeof(const_header)); | |
766 | if (ret < 0) { | |
767 | bdrv_refresh_filename(file->bs); | |
768 | error_setg_errno(errp, -ret, | |
769 | "Could not read const header from file '%s'", | |
770 | file->bs->filename); | |
771 | return ret; | |
772 | } | |
773 | ||
774 | /* check const header */ | |
775 | ret = check_se_sparse_const_header(&const_header, errp); | |
776 | if (ret < 0) { | |
777 | return ret; | |
778 | } | |
779 | ||
780 | assert(sizeof(volatile_header) == SECTOR_SIZE); | |
781 | ||
782 | ret = bdrv_pread(file, | |
783 | const_header.volatile_header_offset * SECTOR_SIZE, | |
784 | &volatile_header, sizeof(volatile_header)); | |
785 | if (ret < 0) { | |
786 | bdrv_refresh_filename(file->bs); | |
787 | error_setg_errno(errp, -ret, | |
788 | "Could not read volatile header from file '%s'", | |
789 | file->bs->filename); | |
790 | return ret; | |
791 | } | |
792 | ||
793 | /* check volatile header */ | |
794 | ret = check_se_sparse_volatile_header(&volatile_header, errp); | |
795 | if (ret < 0) { | |
796 | return ret; | |
797 | } | |
798 | ||
799 | ret = vmdk_add_extent(bs, file, false, | |
800 | const_header.capacity, | |
801 | const_header.grain_dir_offset * SECTOR_SIZE, | |
802 | 0, | |
803 | const_header.grain_dir_size * | |
804 | SECTOR_SIZE / sizeof(uint64_t), | |
805 | const_header.grain_table_size * | |
806 | SECTOR_SIZE / sizeof(uint64_t), | |
807 | const_header.grain_size, | |
808 | &extent, | |
809 | errp); | |
810 | if (ret < 0) { | |
811 | return ret; | |
812 | } | |
813 | ||
814 | extent->sesparse = true; | |
815 | extent->sesparse_l2_tables_offset = const_header.grain_tables_offset; | |
816 | extent->sesparse_clusters_offset = const_header.grains_offset; | |
817 | extent->entry_size = sizeof(uint64_t); | |
818 | ||
819 | ret = vmdk_init_tables(bs, extent, errp); | |
820 | if (ret) { | |
821 | /* free extent allocated by vmdk_add_extent */ | |
822 | vmdk_free_last_extent(bs); | |
823 | } | |
824 | ||
825 | return ret; | |
826 | } | |
827 | ||
d1833ef5 | 828 | static int vmdk_open_desc_file(BlockDriverState *bs, int flags, char *buf, |
a6468367 | 829 | QDict *options, Error **errp); |
f16f509d | 830 | |
cf2ab8fc | 831 | static char *vmdk_read_desc(BdrvChild *file, uint64_t desc_offset, Error **errp) |
a8842e6d PB |
832 | { |
833 | int64_t size; | |
834 | char *buf; | |
835 | int ret; | |
836 | ||
cf2ab8fc | 837 | size = bdrv_getlength(file->bs); |
a8842e6d PB |
838 | if (size < 0) { |
839 | error_setg_errno(errp, -size, "Could not access file"); | |
840 | return NULL; | |
841 | } | |
842 | ||
03c3359d FZ |
843 | if (size < 4) { |
844 | /* Both descriptor file and sparse image must be much larger than 4 | |
845 | * bytes, also callers of vmdk_read_desc want to compare the first 4 | |
846 | * bytes with VMDK4_MAGIC, let's error out if less is read. */ | |
847 | error_setg(errp, "File is too small, not a valid image"); | |
848 | return NULL; | |
849 | } | |
850 | ||
73b7bcad FZ |
851 | size = MIN(size, (1 << 20) - 1); /* avoid unbounded allocation */ |
852 | buf = g_malloc(size + 1); | |
a8842e6d PB |
853 | |
854 | ret = bdrv_pread(file, desc_offset, buf, size); | |
855 | if (ret < 0) { | |
856 | error_setg_errno(errp, -ret, "Could not read from file"); | |
857 | g_free(buf); | |
858 | return NULL; | |
859 | } | |
73b7bcad | 860 | buf[ret] = 0; |
a8842e6d PB |
861 | |
862 | return buf; | |
863 | } | |
864 | ||
86c6b429 | 865 | static int vmdk_open_vmdk4(BlockDriverState *bs, |
24bc15d1 | 866 | BdrvChild *file, |
a6468367 | 867 | int flags, QDict *options, Error **errp) |
b4b3ab14 FZ |
868 | { |
869 | int ret; | |
870 | uint32_t magic; | |
871 | uint32_t l1_size, l1_entry_sectors; | |
872 | VMDK4Header header; | |
cd466702 | 873 | VmdkExtent *extent = NULL; |
f4c129a3 | 874 | BDRVVmdkState *s = bs->opaque; |
bb45ded9 | 875 | int64_t l1_backup_offset = 0; |
3db1d98a | 876 | bool compressed; |
b4b3ab14 | 877 | |
cf2ab8fc | 878 | ret = bdrv_pread(file, sizeof(magic), &header, sizeof(header)); |
b4b3ab14 | 879 | if (ret < 0) { |
f30c66ba | 880 | bdrv_refresh_filename(file->bs); |
4823970b FZ |
881 | error_setg_errno(errp, -ret, |
882 | "Could not read header from file '%s'", | |
24bc15d1 | 883 | file->bs->filename); |
89ac8480 | 884 | return -EINVAL; |
b4b3ab14 | 885 | } |
5a394b9e | 886 | if (header.capacity == 0) { |
e98768d4 | 887 | uint64_t desc_offset = le64_to_cpu(header.desc_offset); |
5a394b9e | 888 | if (desc_offset) { |
cf2ab8fc | 889 | char *buf = vmdk_read_desc(file, desc_offset << 9, errp); |
d1833ef5 PB |
890 | if (!buf) { |
891 | return -EINVAL; | |
892 | } | |
a6468367 | 893 | ret = vmdk_open_desc_file(bs, flags, buf, options, errp); |
d1833ef5 PB |
894 | g_free(buf); |
895 | return ret; | |
5a394b9e | 896 | } |
f16f509d | 897 | } |
65bd155c | 898 | |
f4c129a3 FZ |
899 | if (!s->create_type) { |
900 | s->create_type = g_strdup("monolithicSparse"); | |
901 | } | |
902 | ||
65bd155c KW |
903 | if (le64_to_cpu(header.gd_offset) == VMDK4_GD_AT_END) { |
904 | /* | |
905 | * The footer takes precedence over the header, so read it in. The | |
906 | * footer starts at offset -1024 from the end: One sector for the | |
907 | * footer, and another one for the end-of-stream marker. | |
908 | */ | |
909 | struct { | |
910 | struct { | |
911 | uint64_t val; | |
912 | uint32_t size; | |
913 | uint32_t type; | |
914 | uint8_t pad[512 - 16]; | |
915 | } QEMU_PACKED footer_marker; | |
916 | ||
917 | uint32_t magic; | |
918 | VMDK4Header header; | |
919 | uint8_t pad[512 - 4 - sizeof(VMDK4Header)]; | |
920 | ||
921 | struct { | |
922 | uint64_t val; | |
923 | uint32_t size; | |
924 | uint32_t type; | |
925 | uint8_t pad[512 - 16]; | |
926 | } QEMU_PACKED eos_marker; | |
927 | } QEMU_PACKED footer; | |
928 | ||
cf2ab8fc | 929 | ret = bdrv_pread(file, |
9a4f4c31 | 930 | bs->file->bs->total_sectors * 512 - 1536, |
65bd155c KW |
931 | &footer, sizeof(footer)); |
932 | if (ret < 0) { | |
d899d2e2 | 933 | error_setg_errno(errp, -ret, "Failed to read footer"); |
65bd155c KW |
934 | return ret; |
935 | } | |
936 | ||
937 | /* Some sanity checks for the footer */ | |
938 | if (be32_to_cpu(footer.magic) != VMDK4_MAGIC || | |
939 | le32_to_cpu(footer.footer_marker.size) != 0 || | |
940 | le32_to_cpu(footer.footer_marker.type) != MARKER_FOOTER || | |
941 | le64_to_cpu(footer.eos_marker.val) != 0 || | |
942 | le32_to_cpu(footer.eos_marker.size) != 0 || | |
943 | le32_to_cpu(footer.eos_marker.type) != MARKER_END_OF_STREAM) | |
944 | { | |
d899d2e2 | 945 | error_setg(errp, "Invalid footer"); |
65bd155c KW |
946 | return -EINVAL; |
947 | } | |
948 | ||
949 | header = footer.header; | |
950 | } | |
951 | ||
3db1d98a FZ |
952 | compressed = |
953 | le16_to_cpu(header.compressAlgorithm) == VMDK4_COMPRESSION_DEFLATE; | |
509d39aa | 954 | if (le32_to_cpu(header.version) > 3) { |
a55448b3 HR |
955 | error_setg(errp, "Unsupported VMDK version %" PRIu32, |
956 | le32_to_cpu(header.version)); | |
96c51eb5 | 957 | return -ENOTSUP; |
3db1d98a FZ |
958 | } else if (le32_to_cpu(header.version) == 3 && (flags & BDRV_O_RDWR) && |
959 | !compressed) { | |
509d39aa FZ |
960 | /* VMware KB 2064959 explains that version 3 added support for |
961 | * persistent changed block tracking (CBT), and backup software can | |
962 | * read it as version=1 if it doesn't care about the changed area | |
963 | * information. So we are safe to enable read only. */ | |
964 | error_setg(errp, "VMDK version 3 must be read only"); | |
965 | return -EINVAL; | |
96c51eb5 FZ |
966 | } |
967 | ||
ca8804ce | 968 | if (le32_to_cpu(header.num_gtes_per_gt) > 512) { |
89ac8480 | 969 | error_setg(errp, "L2 table size too big"); |
f8ce0403 FZ |
970 | return -EINVAL; |
971 | } | |
972 | ||
ca8804ce | 973 | l1_entry_sectors = le32_to_cpu(header.num_gtes_per_gt) |
b4b3ab14 | 974 | * le64_to_cpu(header.granularity); |
75d12341 | 975 | if (l1_entry_sectors == 0) { |
d899d2e2 | 976 | error_setg(errp, "L1 entry size is invalid"); |
86c6b429 FZ |
977 | return -EINVAL; |
978 | } | |
b4b3ab14 FZ |
979 | l1_size = (le64_to_cpu(header.capacity) + l1_entry_sectors - 1) |
980 | / l1_entry_sectors; | |
bb45ded9 FZ |
981 | if (le32_to_cpu(header.flags) & VMDK4_FLAG_RGD) { |
982 | l1_backup_offset = le64_to_cpu(header.rgd_offset) << 9; | |
983 | } | |
24bc15d1 | 984 | if (bdrv_nb_sectors(file->bs) < le64_to_cpu(header.grain_offset)) { |
4ab9dab5 FZ |
985 | error_setg(errp, "File truncated, expecting at least %" PRId64 " bytes", |
986 | (int64_t)(le64_to_cpu(header.grain_offset) | |
987 | * BDRV_SECTOR_SIZE)); | |
34ceed81 FZ |
988 | return -EINVAL; |
989 | } | |
990 | ||
8aa1331c | 991 | ret = vmdk_add_extent(bs, file, false, |
b4b3ab14 FZ |
992 | le64_to_cpu(header.capacity), |
993 | le64_to_cpu(header.gd_offset) << 9, | |
bb45ded9 | 994 | l1_backup_offset, |
b4b3ab14 | 995 | l1_size, |
ca8804ce | 996 | le32_to_cpu(header.num_gtes_per_gt), |
8aa1331c | 997 | le64_to_cpu(header.granularity), |
4823970b FZ |
998 | &extent, |
999 | errp); | |
8aa1331c FZ |
1000 | if (ret < 0) { |
1001 | return ret; | |
1002 | } | |
432bb170 FZ |
1003 | extent->compressed = |
1004 | le16_to_cpu(header.compressAlgorithm) == VMDK4_COMPRESSION_DEFLATE; | |
d8a7b061 FZ |
1005 | if (extent->compressed) { |
1006 | g_free(s->create_type); | |
1007 | s->create_type = g_strdup("streamOptimized"); | |
1008 | } | |
432bb170 | 1009 | extent->has_marker = le32_to_cpu(header.flags) & VMDK4_FLAG_MARKER; |
14ead646 FZ |
1010 | extent->version = le32_to_cpu(header.version); |
1011 | extent->has_zero_grain = le32_to_cpu(header.flags) & VMDK4_FLAG_ZERO_GRAIN; | |
4823970b | 1012 | ret = vmdk_init_tables(bs, extent, errp); |
b4b3ab14 | 1013 | if (ret) { |
86c6b429 FZ |
1014 | /* free extent allocated by vmdk_add_extent */ |
1015 | vmdk_free_last_extent(bs); | |
b4b3ab14 | 1016 | } |
b4b3ab14 FZ |
1017 | return ret; |
1018 | } | |
1019 | ||
7fa60fa3 FZ |
1020 | /* find an option value out of descriptor file */ |
1021 | static int vmdk_parse_description(const char *desc, const char *opt_name, | |
1022 | char *buf, int buf_size) | |
1023 | { | |
1024 | char *opt_pos, *opt_end; | |
1025 | const char *end = desc + strlen(desc); | |
1026 | ||
1027 | opt_pos = strstr(desc, opt_name); | |
1028 | if (!opt_pos) { | |
65f74725 | 1029 | return VMDK_ERROR; |
7fa60fa3 FZ |
1030 | } |
1031 | /* Skip "=\"" following opt_name */ | |
1032 | opt_pos += strlen(opt_name) + 2; | |
1033 | if (opt_pos >= end) { | |
65f74725 | 1034 | return VMDK_ERROR; |
7fa60fa3 FZ |
1035 | } |
1036 | opt_end = opt_pos; | |
1037 | while (opt_end < end && *opt_end != '"') { | |
1038 | opt_end++; | |
1039 | } | |
1040 | if (opt_end == end || buf_size < opt_end - opt_pos + 1) { | |
65f74725 | 1041 | return VMDK_ERROR; |
7fa60fa3 FZ |
1042 | } |
1043 | pstrcpy(buf, opt_end - opt_pos + 1, opt_pos); | |
65f74725 | 1044 | return VMDK_OK; |
7fa60fa3 FZ |
1045 | } |
1046 | ||
86c6b429 | 1047 | /* Open an extent file and append to bs array */ |
24bc15d1 | 1048 | static int vmdk_open_sparse(BlockDriverState *bs, BdrvChild *file, int flags, |
a6468367 | 1049 | char *buf, QDict *options, Error **errp) |
86c6b429 FZ |
1050 | { |
1051 | uint32_t magic; | |
1052 | ||
d1833ef5 | 1053 | magic = ldl_be_p(buf); |
86c6b429 FZ |
1054 | switch (magic) { |
1055 | case VMDK3_MAGIC: | |
4823970b | 1056 | return vmdk_open_vmfs_sparse(bs, file, flags, errp); |
86c6b429 | 1057 | case VMDK4_MAGIC: |
a6468367 | 1058 | return vmdk_open_vmdk4(bs, file, flags, options, errp); |
86c6b429 | 1059 | default: |
76abe407 PB |
1060 | error_setg(errp, "Image not in VMDK format"); |
1061 | return -EINVAL; | |
86c6b429 FZ |
1062 | } |
1063 | } | |
1064 | ||
e4937694 MA |
1065 | static const char *next_line(const char *s) |
1066 | { | |
1067 | while (*s) { | |
1068 | if (*s == '\n') { | |
1069 | return s + 1; | |
1070 | } | |
1071 | s++; | |
1072 | } | |
1073 | return s; | |
1074 | } | |
1075 | ||
7fa60fa3 | 1076 | static int vmdk_parse_extents(const char *desc, BlockDriverState *bs, |
cdc0dd25 | 1077 | QDict *options, Error **errp) |
7fa60fa3 FZ |
1078 | { |
1079 | int ret; | |
395a22fa | 1080 | int matches; |
7fa60fa3 FZ |
1081 | char access[11]; |
1082 | char type[11]; | |
1083 | char fname[512]; | |
d28d737f | 1084 | const char *p, *np; |
7fa60fa3 FZ |
1085 | int64_t sectors = 0; |
1086 | int64_t flat_offset; | |
cdc0dd25 | 1087 | char *desc_file_dir = NULL; |
fe206562 | 1088 | char *extent_path; |
24bc15d1 | 1089 | BdrvChild *extent_file; |
8b1869da | 1090 | BdrvChildRole extent_role; |
f4c129a3 | 1091 | BDRVVmdkState *s = bs->opaque; |
cd466702 | 1092 | VmdkExtent *extent = NULL; |
a6468367 | 1093 | char extent_opt_prefix[32]; |
24bc15d1 | 1094 | Error *local_err = NULL; |
7fa60fa3 | 1095 | |
e4937694 | 1096 | for (p = desc; *p; p = next_line(p)) { |
8a3e0bc3 FZ |
1097 | /* parse extent line in one of below formats: |
1098 | * | |
7fa60fa3 | 1099 | * RW [size in sectors] FLAT "file-name.vmdk" OFFSET |
7fa60fa3 | 1100 | * RW [size in sectors] SPARSE "file-name.vmdk" |
8a3e0bc3 FZ |
1101 | * RW [size in sectors] VMFS "file-name.vmdk" |
1102 | * RW [size in sectors] VMFSSPARSE "file-name.vmdk" | |
98eb9733 | 1103 | * RW [size in sectors] SESPARSE "file-name.vmdk" |
7fa60fa3 FZ |
1104 | */ |
1105 | flat_offset = -1; | |
395a22fa JC |
1106 | matches = sscanf(p, "%10s %" SCNd64 " %10s \"%511[^\n\r\"]\" %" SCNd64, |
1107 | access, §ors, type, fname, &flat_offset); | |
1108 | if (matches < 4 || strcmp(access, "RW")) { | |
e4937694 | 1109 | continue; |
7fa60fa3 | 1110 | } else if (!strcmp(type, "FLAT")) { |
395a22fa | 1111 | if (matches != 5 || flat_offset < 0) { |
d28d737f | 1112 | goto invalid; |
7fa60fa3 | 1113 | } |
dbbcaa8d | 1114 | } else if (!strcmp(type, "VMFS")) { |
395a22fa | 1115 | if (matches == 4) { |
b47053bd FZ |
1116 | flat_offset = 0; |
1117 | } else { | |
d28d737f | 1118 | goto invalid; |
b47053bd | 1119 | } |
395a22fa | 1120 | } else if (matches != 4) { |
d28d737f | 1121 | goto invalid; |
7fa60fa3 FZ |
1122 | } |
1123 | ||
7fa60fa3 | 1124 | if (sectors <= 0 || |
daac8fdc | 1125 | (strcmp(type, "FLAT") && strcmp(type, "SPARSE") && |
98eb9733 SE |
1126 | strcmp(type, "VMFS") && strcmp(type, "VMFSSPARSE") && |
1127 | strcmp(type, "SESPARSE")) || | |
7fa60fa3 | 1128 | (strcmp(access, "RW"))) { |
e4937694 | 1129 | continue; |
7fa60fa3 FZ |
1130 | } |
1131 | ||
cdc0dd25 HR |
1132 | if (path_is_absolute(fname)) { |
1133 | extent_path = g_strdup(fname); | |
1134 | } else { | |
1135 | if (!desc_file_dir) { | |
1136 | desc_file_dir = bdrv_dirname(bs->file->bs, errp); | |
1137 | if (!desc_file_dir) { | |
1138 | bdrv_refresh_filename(bs->file->bs); | |
1139 | error_prepend(errp, "Cannot use relative paths with VMDK " | |
1140 | "descriptor file '%s': ", | |
1141 | bs->file->bs->filename); | |
1142 | ret = -EINVAL; | |
1143 | goto out; | |
1144 | } | |
1145 | } | |
5c98415b | 1146 | |
cdc0dd25 HR |
1147 | extent_path = g_strconcat(desc_file_dir, fname, NULL); |
1148 | } | |
a6468367 KW |
1149 | |
1150 | ret = snprintf(extent_opt_prefix, 32, "extents.%d", s->num_extents); | |
1151 | assert(ret < 32); | |
1152 | ||
8b1869da HR |
1153 | extent_role = BDRV_CHILD_DATA; |
1154 | if (strcmp(type, "FLAT") != 0 && strcmp(type, "VMFS") != 0) { | |
1155 | /* non-flat extents have metadata */ | |
1156 | extent_role |= BDRV_CHILD_METADATA; | |
1157 | } | |
1158 | ||
24bc15d1 | 1159 | extent_file = bdrv_open_child(extent_path, options, extent_opt_prefix, |
8b1869da HR |
1160 | bs, &child_of_bds, extent_role, false, |
1161 | &local_err); | |
fe206562 | 1162 | g_free(extent_path); |
24bc15d1 KW |
1163 | if (local_err) { |
1164 | error_propagate(errp, local_err); | |
cdc0dd25 HR |
1165 | ret = -EINVAL; |
1166 | goto out; | |
86c6b429 FZ |
1167 | } |
1168 | ||
7fa60fa3 | 1169 | /* save to extents array */ |
04d542c8 | 1170 | if (!strcmp(type, "FLAT") || !strcmp(type, "VMFS")) { |
7fa60fa3 | 1171 | /* FLAT extent */ |
7fa60fa3 | 1172 | |
8aa1331c | 1173 | ret = vmdk_add_extent(bs, extent_file, true, sectors, |
4823970b | 1174 | 0, 0, 0, 0, 0, &extent, errp); |
8aa1331c | 1175 | if (ret < 0) { |
24bc15d1 | 1176 | bdrv_unref_child(bs, extent_file); |
cdc0dd25 | 1177 | goto out; |
8aa1331c | 1178 | } |
f16f509d | 1179 | extent->flat_start_offset = flat_offset << 9; |
daac8fdc FZ |
1180 | } else if (!strcmp(type, "SPARSE") || !strcmp(type, "VMFSSPARSE")) { |
1181 | /* SPARSE extent and VMFSSPARSE extent are both "COWD" sparse file*/ | |
cf2ab8fc | 1182 | char *buf = vmdk_read_desc(extent_file, 0, errp); |
d1833ef5 PB |
1183 | if (!buf) { |
1184 | ret = -EINVAL; | |
1185 | } else { | |
a6468367 KW |
1186 | ret = vmdk_open_sparse(bs, extent_file, bs->open_flags, buf, |
1187 | options, errp); | |
d1833ef5 | 1188 | } |
b6b1d31f | 1189 | g_free(buf); |
86c6b429 | 1190 | if (ret) { |
24bc15d1 | 1191 | bdrv_unref_child(bs, extent_file); |
cdc0dd25 | 1192 | goto out; |
86c6b429 | 1193 | } |
f4c129a3 | 1194 | extent = &s->extents[s->num_extents - 1]; |
98eb9733 SE |
1195 | } else if (!strcmp(type, "SESPARSE")) { |
1196 | ret = vmdk_open_se_sparse(bs, extent_file, bs->open_flags, errp); | |
1197 | if (ret) { | |
1198 | bdrv_unref_child(bs, extent_file); | |
cdc0dd25 | 1199 | goto out; |
98eb9733 SE |
1200 | } |
1201 | extent = &s->extents[s->num_extents - 1]; | |
7fa60fa3 | 1202 | } else { |
4823970b | 1203 | error_setg(errp, "Unsupported extent type '%s'", type); |
24bc15d1 | 1204 | bdrv_unref_child(bs, extent_file); |
cdc0dd25 HR |
1205 | ret = -ENOTSUP; |
1206 | goto out; | |
7fa60fa3 | 1207 | } |
f4c129a3 | 1208 | extent->type = g_strdup(type); |
7fa60fa3 | 1209 | } |
cdc0dd25 HR |
1210 | |
1211 | ret = 0; | |
1212 | goto out; | |
d28d737f MA |
1213 | |
1214 | invalid: | |
1215 | np = next_line(p); | |
1216 | assert(np != p); | |
1217 | if (np[-1] == '\n') { | |
1218 | np--; | |
1219 | } | |
1220 | error_setg(errp, "Invalid extent line: %.*s", (int)(np - p), p); | |
cdc0dd25 HR |
1221 | ret = -EINVAL; |
1222 | ||
1223 | out: | |
1224 | g_free(desc_file_dir); | |
1225 | return ret; | |
7fa60fa3 FZ |
1226 | } |
1227 | ||
d1833ef5 | 1228 | static int vmdk_open_desc_file(BlockDriverState *bs, int flags, char *buf, |
a6468367 | 1229 | QDict *options, Error **errp) |
7fa60fa3 FZ |
1230 | { |
1231 | int ret; | |
7fa60fa3 FZ |
1232 | char ct[128]; |
1233 | BDRVVmdkState *s = bs->opaque; | |
1234 | ||
7fa60fa3 | 1235 | if (vmdk_parse_description(buf, "createType", ct, sizeof(ct))) { |
76abe407 PB |
1236 | error_setg(errp, "invalid VMDK image descriptor"); |
1237 | ret = -EINVAL; | |
0bed087d | 1238 | goto exit; |
7fa60fa3 | 1239 | } |
6398de51 | 1240 | if (strcmp(ct, "monolithicFlat") && |
04d542c8 | 1241 | strcmp(ct, "vmfs") && |
daac8fdc | 1242 | strcmp(ct, "vmfsSparse") && |
98eb9733 | 1243 | strcmp(ct, "seSparse") && |
86c6b429 | 1244 | strcmp(ct, "twoGbMaxExtentSparse") && |
6398de51 | 1245 | strcmp(ct, "twoGbMaxExtentFlat")) { |
4823970b | 1246 | error_setg(errp, "Unsupported image type '%s'", ct); |
0bed087d EB |
1247 | ret = -ENOTSUP; |
1248 | goto exit; | |
7fa60fa3 | 1249 | } |
f4c129a3 | 1250 | s->create_type = g_strdup(ct); |
7fa60fa3 | 1251 | s->desc_offset = 0; |
cdc0dd25 | 1252 | ret = vmdk_parse_extents(buf, bs, options, errp); |
0bed087d | 1253 | exit: |
0bed087d | 1254 | return ret; |
7fa60fa3 FZ |
1255 | } |
1256 | ||
015a1036 HR |
1257 | static int vmdk_open(BlockDriverState *bs, QDict *options, int flags, |
1258 | Error **errp) | |
b4b3ab14 | 1259 | { |
9aeecbbc | 1260 | char *buf; |
86c6b429 FZ |
1261 | int ret; |
1262 | BDRVVmdkState *s = bs->opaque; | |
37f09e5e | 1263 | uint32_t magic; |
b4b3ab14 | 1264 | |
8b1869da HR |
1265 | bs->file = bdrv_open_child(NULL, options, "file", bs, &child_of_bds, |
1266 | BDRV_CHILD_IMAGE, false, errp); | |
4e4bf5c4 KW |
1267 | if (!bs->file) { |
1268 | return -EINVAL; | |
1269 | } | |
1270 | ||
cf2ab8fc | 1271 | buf = vmdk_read_desc(bs->file, 0, errp); |
d1833ef5 PB |
1272 | if (!buf) { |
1273 | return -EINVAL; | |
1274 | } | |
1275 | ||
37f09e5e PB |
1276 | magic = ldl_be_p(buf); |
1277 | switch (magic) { | |
1278 | case VMDK3_MAGIC: | |
1279 | case VMDK4_MAGIC: | |
9a4f4c31 | 1280 | ret = vmdk_open_sparse(bs, bs->file, flags, buf, options, |
24bc15d1 | 1281 | errp); |
37f09e5e PB |
1282 | s->desc_offset = 0x200; |
1283 | break; | |
1284 | default: | |
8b1869da HR |
1285 | /* No data in the descriptor file */ |
1286 | bs->file->role &= ~BDRV_CHILD_DATA; | |
1287 | ||
1288 | /* Must succeed because we have given up permissions if anything */ | |
1289 | bdrv_child_refresh_perms(bs, bs->file, &error_abort); | |
1290 | ||
a6468367 | 1291 | ret = vmdk_open_desc_file(bs, flags, buf, options, errp); |
37f09e5e | 1292 | break; |
b4b3ab14 | 1293 | } |
37f09e5e PB |
1294 | if (ret) { |
1295 | goto fail; | |
1296 | } | |
1297 | ||
bae0a0cc PB |
1298 | /* try to open parent images, if exist */ |
1299 | ret = vmdk_parent_open(bs); | |
1300 | if (ret) { | |
1301 | goto fail; | |
1302 | } | |
9877860e PM |
1303 | ret = vmdk_read_cid(bs, 0, &s->cid); |
1304 | if (ret) { | |
1305 | goto fail; | |
1306 | } | |
1307 | ret = vmdk_read_cid(bs, 1, &s->parent_cid); | |
1308 | if (ret) { | |
1309 | goto fail; | |
1310 | } | |
848c66e8 | 1311 | qemu_co_mutex_init(&s->lock); |
2bc3166c KW |
1312 | |
1313 | /* Disable migration when VMDK images are used */ | |
81e5f78a AG |
1314 | error_setg(&s->migration_blocker, "The vmdk format used by node '%s' " |
1315 | "does not support live migration", | |
1316 | bdrv_get_device_or_node_name(bs)); | |
386f6c07 MA |
1317 | ret = migrate_add_blocker(s->migration_blocker, errp); |
1318 | if (ret < 0) { | |
fe44dc91 AA |
1319 | error_free(s->migration_blocker); |
1320 | goto fail; | |
1321 | } | |
1322 | ||
d1833ef5 | 1323 | g_free(buf); |
2bc3166c | 1324 | return 0; |
bae0a0cc PB |
1325 | |
1326 | fail: | |
d1833ef5 | 1327 | g_free(buf); |
f4c129a3 FZ |
1328 | g_free(s->create_type); |
1329 | s->create_type = NULL; | |
bae0a0cc PB |
1330 | vmdk_free_extents(bs); |
1331 | return ret; | |
ea2384d3 FB |
1332 | } |
1333 | ||
d34682cd | 1334 | |
3baca891 | 1335 | static void vmdk_refresh_limits(BlockDriverState *bs, Error **errp) |
d34682cd KW |
1336 | { |
1337 | BDRVVmdkState *s = bs->opaque; | |
1338 | int i; | |
1339 | ||
1340 | for (i = 0; i < s->num_extents; i++) { | |
1341 | if (!s->extents[i].flat) { | |
cf081fca EB |
1342 | bs->bl.pwrite_zeroes_alignment = |
1343 | MAX(bs->bl.pwrite_zeroes_alignment, | |
1344 | s->extents[i].cluster_sectors << BDRV_SECTOR_BITS); | |
d34682cd KW |
1345 | } |
1346 | } | |
d34682cd KW |
1347 | } |
1348 | ||
c6ac36e1 FZ |
1349 | /** |
1350 | * get_whole_cluster | |
1351 | * | |
1352 | * Copy backing file's cluster that covers @sector_num, otherwise write zero, | |
4823cde5 KW |
1353 | * to the cluster at @cluster_sector_num. If @zeroed is true, we're overwriting |
1354 | * a zeroed cluster in the current layer and must not copy data from the | |
1355 | * backing file. | |
c6ac36e1 FZ |
1356 | * |
1357 | * If @skip_start_sector < @skip_end_sector, the relative range | |
1358 | * [@skip_start_sector, @skip_end_sector) is not copied or written, and leave | |
1359 | * it for call to write user data in the request. | |
1360 | */ | |
b3976d3c | 1361 | static int get_whole_cluster(BlockDriverState *bs, |
c6ac36e1 | 1362 | VmdkExtent *extent, |
37b1d7d8 KW |
1363 | uint64_t cluster_offset, |
1364 | uint64_t offset, | |
1365 | uint64_t skip_start_bytes, | |
4823cde5 KW |
1366 | uint64_t skip_end_bytes, |
1367 | bool zeroed) | |
5f4da8c0 | 1368 | { |
bf81507d | 1369 | int ret = VMDK_OK; |
c6ac36e1 FZ |
1370 | int64_t cluster_bytes; |
1371 | uint8_t *whole_grain; | |
4823cde5 | 1372 | bool copy_from_backing; |
c6ac36e1 FZ |
1373 | |
1374 | /* For COW, align request sector_num to cluster start */ | |
c6ac36e1 | 1375 | cluster_bytes = extent->cluster_sectors << BDRV_SECTOR_BITS; |
37b1d7d8 | 1376 | offset = QEMU_ALIGN_DOWN(offset, cluster_bytes); |
c6ac36e1 | 1377 | whole_grain = qemu_blockalign(bs, cluster_bytes); |
4823cde5 | 1378 | copy_from_backing = bs->backing && !zeroed; |
5f4da8c0 | 1379 | |
4823cde5 | 1380 | if (!copy_from_backing) { |
37b1d7d8 KW |
1381 | memset(whole_grain, 0, skip_start_bytes); |
1382 | memset(whole_grain + skip_end_bytes, 0, cluster_bytes - skip_end_bytes); | |
c6ac36e1 FZ |
1383 | } |
1384 | ||
37b1d7d8 | 1385 | assert(skip_end_bytes <= cluster_bytes); |
0e69c543 FZ |
1386 | /* we will be here if it's first write on non-exist grain(cluster). |
1387 | * try to read from parent image, if exist */ | |
760e0063 | 1388 | if (bs->backing && !vmdk_is_cid_valid(bs)) { |
c6ac36e1 FZ |
1389 | ret = VMDK_ERROR; |
1390 | goto exit; | |
1391 | } | |
5f4da8c0 | 1392 | |
c6ac36e1 | 1393 | /* Read backing data before skip range */ |
37b1d7d8 | 1394 | if (skip_start_bytes > 0) { |
4823cde5 | 1395 | if (copy_from_backing) { |
23c4b2a8 HR |
1396 | /* qcow2 emits this on bs->file instead of bs->backing */ |
1397 | BLKDBG_EVENT(extent->file, BLKDBG_COW_READ); | |
cf2ab8fc | 1398 | ret = bdrv_pread(bs->backing, offset, whole_grain, |
37b1d7d8 | 1399 | skip_start_bytes); |
c6ac36e1 FZ |
1400 | if (ret < 0) { |
1401 | ret = VMDK_ERROR; | |
1402 | goto exit; | |
1403 | } | |
1404 | } | |
23c4b2a8 | 1405 | BLKDBG_EVENT(extent->file, BLKDBG_COW_WRITE); |
d9ca2ea2 | 1406 | ret = bdrv_pwrite(extent->file, cluster_offset, whole_grain, |
37b1d7d8 | 1407 | skip_start_bytes); |
c336500d | 1408 | if (ret < 0) { |
bf81507d FZ |
1409 | ret = VMDK_ERROR; |
1410 | goto exit; | |
c336500d | 1411 | } |
c6ac36e1 FZ |
1412 | } |
1413 | /* Read backing data after skip range */ | |
37b1d7d8 | 1414 | if (skip_end_bytes < cluster_bytes) { |
4823cde5 | 1415 | if (copy_from_backing) { |
23c4b2a8 HR |
1416 | /* qcow2 emits this on bs->file instead of bs->backing */ |
1417 | BLKDBG_EVENT(extent->file, BLKDBG_COW_READ); | |
cf2ab8fc | 1418 | ret = bdrv_pread(bs->backing, offset + skip_end_bytes, |
37b1d7d8 KW |
1419 | whole_grain + skip_end_bytes, |
1420 | cluster_bytes - skip_end_bytes); | |
c6ac36e1 FZ |
1421 | if (ret < 0) { |
1422 | ret = VMDK_ERROR; | |
1423 | goto exit; | |
1424 | } | |
1425 | } | |
23c4b2a8 | 1426 | BLKDBG_EVENT(extent->file, BLKDBG_COW_WRITE); |
d9ca2ea2 | 1427 | ret = bdrv_pwrite(extent->file, cluster_offset + skip_end_bytes, |
37b1d7d8 KW |
1428 | whole_grain + skip_end_bytes, |
1429 | cluster_bytes - skip_end_bytes); | |
c336500d | 1430 | if (ret < 0) { |
bf81507d FZ |
1431 | ret = VMDK_ERROR; |
1432 | goto exit; | |
630530a6 TS |
1433 | } |
1434 | } | |
c6ac36e1 | 1435 | |
37b1d7d8 | 1436 | ret = VMDK_OK; |
bf81507d FZ |
1437 | exit: |
1438 | qemu_vfree(whole_grain); | |
1439 | return ret; | |
630530a6 TS |
1440 | } |
1441 | ||
c6ac36e1 FZ |
1442 | static int vmdk_L2update(VmdkExtent *extent, VmdkMetaData *m_data, |
1443 | uint32_t offset) | |
630530a6 | 1444 | { |
c6ac36e1 | 1445 | offset = cpu_to_le32(offset); |
630530a6 | 1446 | /* update L2 table */ |
23c4b2a8 | 1447 | BLKDBG_EVENT(extent->file, BLKDBG_L2_UPDATE); |
2758be05 | 1448 | if (bdrv_pwrite(extent->file, |
b3976d3c | 1449 | ((int64_t)m_data->l2_offset * 512) |
c6ac36e1 | 1450 | + (m_data->l2_index * sizeof(offset)), |
e304e8e5 | 1451 | &offset, sizeof(offset)) < 0) { |
65f74725 | 1452 | return VMDK_ERROR; |
b3976d3c | 1453 | } |
630530a6 | 1454 | /* update backup L2 table */ |
b3976d3c FZ |
1455 | if (extent->l1_backup_table_offset != 0) { |
1456 | m_data->l2_offset = extent->l1_backup_table[m_data->l1_index]; | |
2758be05 | 1457 | if (bdrv_pwrite(extent->file, |
b3976d3c | 1458 | ((int64_t)m_data->l2_offset * 512) |
c6ac36e1 | 1459 | + (m_data->l2_index * sizeof(offset)), |
e304e8e5 | 1460 | &offset, sizeof(offset)) < 0) { |
65f74725 | 1461 | return VMDK_ERROR; |
b3976d3c | 1462 | } |
5f4da8c0 | 1463 | } |
2758be05 KW |
1464 | if (bdrv_flush(extent->file->bs) < 0) { |
1465 | return VMDK_ERROR; | |
1466 | } | |
cdeaf1f1 FZ |
1467 | if (m_data->l2_cache_entry) { |
1468 | *m_data->l2_cache_entry = offset; | |
1469 | } | |
630530a6 | 1470 | |
65f74725 | 1471 | return VMDK_OK; |
5f4da8c0 TS |
1472 | } |
1473 | ||
c6ac36e1 FZ |
1474 | /** |
1475 | * get_cluster_offset | |
1476 | * | |
1477 | * Look up cluster offset in extent file by sector number, and store in | |
1478 | * @cluster_offset. | |
1479 | * | |
1480 | * For flat extents, the start offset as parsed from the description file is | |
1481 | * returned. | |
1482 | * | |
1483 | * For sparse extents, look up in L1, L2 table. If allocate is true, return an | |
1484 | * offset for a new cluster and update L2 cache. If there is a backing file, | |
1485 | * COW is done before returning; otherwise, zeroes are written to the allocated | |
1486 | * cluster. Both COW and zero writing skips the sector range | |
1487 | * [@skip_start_sector, @skip_end_sector) passed in by caller, because caller | |
1488 | * has new data to write there. | |
1489 | * | |
1490 | * Returns: VMDK_OK if cluster exists and mapped in the image. | |
1491 | * VMDK_UNALLOC if cluster is not mapped and @allocate is false. | |
1492 | * VMDK_ERROR if failed. | |
1493 | */ | |
91b85bd3 | 1494 | static int get_cluster_offset(BlockDriverState *bs, |
c6ac36e1 FZ |
1495 | VmdkExtent *extent, |
1496 | VmdkMetaData *m_data, | |
1497 | uint64_t offset, | |
1498 | bool allocate, | |
1499 | uint64_t *cluster_offset, | |
37b1d7d8 KW |
1500 | uint64_t skip_start_bytes, |
1501 | uint64_t skip_end_bytes) | |
ea2384d3 | 1502 | { |
ea2384d3 FB |
1503 | unsigned int l1_index, l2_offset, l2_index; |
1504 | int min_index, i, j; | |
98eb9733 SE |
1505 | uint32_t min_count; |
1506 | void *l2_table; | |
14ead646 | 1507 | bool zeroed = false; |
c6ac36e1 | 1508 | int64_t ret; |
d1319b07 | 1509 | int64_t cluster_sector; |
98eb9733 | 1510 | unsigned int l2_size_bytes = extent->l2_size * extent->entry_size; |
630530a6 | 1511 | |
ae261c86 | 1512 | if (m_data) { |
4dc20e64 | 1513 | m_data->new_allocation = false; |
ae261c86 | 1514 | } |
91b85bd3 | 1515 | if (extent->flat) { |
7fa60fa3 | 1516 | *cluster_offset = extent->flat_start_offset; |
65f74725 | 1517 | return VMDK_OK; |
91b85bd3 | 1518 | } |
630530a6 | 1519 | |
6398de51 | 1520 | offset -= (extent->end_sector - extent->sectors) * SECTOR_SIZE; |
b3976d3c FZ |
1521 | l1_index = (offset >> 9) / extent->l1_entry_sectors; |
1522 | if (l1_index >= extent->l1_size) { | |
65f74725 | 1523 | return VMDK_ERROR; |
b3976d3c | 1524 | } |
98eb9733 SE |
1525 | if (extent->sesparse) { |
1526 | uint64_t l2_offset_u64; | |
1527 | ||
1528 | assert(extent->entry_size == sizeof(uint64_t)); | |
1529 | ||
1530 | l2_offset_u64 = ((uint64_t *)extent->l1_table)[l1_index]; | |
1531 | if (l2_offset_u64 == 0) { | |
1532 | l2_offset = 0; | |
1533 | } else if ((l2_offset_u64 & 0xffffffff00000000) != 0x1000000000000000) { | |
1534 | /* | |
1535 | * Top most nibble is 0x1 if grain table is allocated. | |
1536 | * strict check - top most 4 bytes must be 0x10000000 since max | |
1537 | * supported size is 64TB for disk - so no more than 64TB / 16MB | |
1538 | * grain directories which is smaller than uint32, | |
1539 | * where 16MB is the only supported default grain table coverage. | |
1540 | */ | |
1541 | return VMDK_ERROR; | |
1542 | } else { | |
1543 | l2_offset_u64 = l2_offset_u64 & 0x00000000ffffffff; | |
1544 | l2_offset_u64 = extent->sesparse_l2_tables_offset + | |
1545 | l2_offset_u64 * l2_size_bytes / SECTOR_SIZE; | |
1546 | if (l2_offset_u64 > 0x00000000ffffffff) { | |
1547 | return VMDK_ERROR; | |
1548 | } | |
1549 | l2_offset = (unsigned int)(l2_offset_u64); | |
1550 | } | |
1551 | } else { | |
1552 | assert(extent->entry_size == sizeof(uint32_t)); | |
1553 | l2_offset = ((uint32_t *)extent->l1_table)[l1_index]; | |
1554 | } | |
b3976d3c | 1555 | if (!l2_offset) { |
65f74725 | 1556 | return VMDK_UNALLOC; |
b3976d3c | 1557 | } |
b4b3ab14 | 1558 | for (i = 0; i < L2_CACHE_SIZE; i++) { |
b3976d3c | 1559 | if (l2_offset == extent->l2_cache_offsets[i]) { |
ea2384d3 | 1560 | /* increment the hit count */ |
b3976d3c | 1561 | if (++extent->l2_cache_counts[i] == 0xffffffff) { |
b4b3ab14 | 1562 | for (j = 0; j < L2_CACHE_SIZE; j++) { |
b3976d3c | 1563 | extent->l2_cache_counts[j] >>= 1; |
ea2384d3 FB |
1564 | } |
1565 | } | |
98eb9733 | 1566 | l2_table = (char *)extent->l2_cache + (i * l2_size_bytes); |
ea2384d3 FB |
1567 | goto found; |
1568 | } | |
1569 | } | |
1570 | /* not found: load a new entry in the least used one */ | |
1571 | min_index = 0; | |
1572 | min_count = 0xffffffff; | |
b4b3ab14 | 1573 | for (i = 0; i < L2_CACHE_SIZE; i++) { |
b3976d3c FZ |
1574 | if (extent->l2_cache_counts[i] < min_count) { |
1575 | min_count = extent->l2_cache_counts[i]; | |
ea2384d3 FB |
1576 | min_index = i; |
1577 | } | |
1578 | } | |
98eb9733 | 1579 | l2_table = (char *)extent->l2_cache + (min_index * l2_size_bytes); |
23c4b2a8 | 1580 | BLKDBG_EVENT(extent->file, BLKDBG_L2_LOAD); |
cf2ab8fc | 1581 | if (bdrv_pread(extent->file, |
b3976d3c FZ |
1582 | (int64_t)l2_offset * 512, |
1583 | l2_table, | |
98eb9733 SE |
1584 | l2_size_bytes |
1585 | ) != l2_size_bytes) { | |
65f74725 | 1586 | return VMDK_ERROR; |
b3976d3c | 1587 | } |
5f4da8c0 | 1588 | |
b3976d3c FZ |
1589 | extent->l2_cache_offsets[min_index] = l2_offset; |
1590 | extent->l2_cache_counts[min_index] = 1; | |
ea2384d3 | 1591 | found: |
b3976d3c | 1592 | l2_index = ((offset >> 9) / extent->cluster_sectors) % extent->l2_size; |
2821c1cc KW |
1593 | if (m_data) { |
1594 | m_data->l1_index = l1_index; | |
1595 | m_data->l2_index = l2_index; | |
1596 | m_data->l2_offset = l2_offset; | |
1597 | m_data->l2_cache_entry = ((uint32_t *)l2_table) + l2_index; | |
1598 | } | |
630530a6 | 1599 | |
98eb9733 SE |
1600 | if (extent->sesparse) { |
1601 | cluster_sector = le64_to_cpu(((uint64_t *)l2_table)[l2_index]); | |
1602 | switch (cluster_sector & 0xf000000000000000) { | |
1603 | case 0x0000000000000000: | |
1604 | /* unallocated grain */ | |
1605 | if (cluster_sector != 0) { | |
1606 | return VMDK_ERROR; | |
1607 | } | |
1608 | break; | |
1609 | case 0x1000000000000000: | |
1610 | /* scsi-unmapped grain - fallthrough */ | |
1611 | case 0x2000000000000000: | |
1612 | /* zero grain */ | |
1613 | zeroed = true; | |
1614 | break; | |
1615 | case 0x3000000000000000: | |
1616 | /* allocated grain */ | |
1617 | cluster_sector = (((cluster_sector & 0x0fff000000000000) >> 48) | | |
1618 | ((cluster_sector & 0x0000ffffffffffff) << 12)); | |
1619 | cluster_sector = extent->sesparse_clusters_offset + | |
1620 | cluster_sector * extent->cluster_sectors; | |
1621 | break; | |
1622 | default: | |
1623 | return VMDK_ERROR; | |
1624 | } | |
1625 | } else { | |
1626 | cluster_sector = le32_to_cpu(((uint32_t *)l2_table)[l2_index]); | |
1627 | ||
1628 | if (extent->has_zero_grain && cluster_sector == VMDK_GTE_ZEROED) { | |
1629 | zeroed = true; | |
1630 | } | |
14ead646 FZ |
1631 | } |
1632 | ||
c6ac36e1 | 1633 | if (!cluster_sector || zeroed) { |
91b85bd3 | 1634 | if (!allocate) { |
14ead646 | 1635 | return zeroed ? VMDK_ZEROED : VMDK_UNALLOC; |
91b85bd3 | 1636 | } |
98eb9733 | 1637 | assert(!extent->sesparse); |
9949f97e | 1638 | |
a77672ea YCL |
1639 | if (extent->next_cluster_sector >= VMDK_EXTENT_MAX_SECTORS) { |
1640 | return VMDK_ERROR; | |
1641 | } | |
1642 | ||
c6ac36e1 FZ |
1643 | cluster_sector = extent->next_cluster_sector; |
1644 | extent->next_cluster_sector += extent->cluster_sectors; | |
630530a6 | 1645 | |
630530a6 TS |
1646 | /* First of all we write grain itself, to avoid race condition |
1647 | * that may to corrupt the image. | |
1648 | * This problem may occur because of insufficient space on host disk | |
1649 | * or inappropriate VM shutdown. | |
1650 | */ | |
37b1d7d8 | 1651 | ret = get_whole_cluster(bs, extent, cluster_sector * BDRV_SECTOR_SIZE, |
4823cde5 KW |
1652 | offset, skip_start_bytes, skip_end_bytes, |
1653 | zeroed); | |
c6ac36e1 FZ |
1654 | if (ret) { |
1655 | return ret; | |
630530a6 | 1656 | } |
524089bc | 1657 | if (m_data) { |
4dc20e64 | 1658 | m_data->new_allocation = true; |
524089bc | 1659 | } |
ff1afc72 | 1660 | } |
c6ac36e1 | 1661 | *cluster_offset = cluster_sector << BDRV_SECTOR_BITS; |
65f74725 | 1662 | return VMDK_OK; |
ea2384d3 FB |
1663 | } |
1664 | ||
b3976d3c FZ |
1665 | static VmdkExtent *find_extent(BDRVVmdkState *s, |
1666 | int64_t sector_num, VmdkExtent *start_hint) | |
1667 | { | |
1668 | VmdkExtent *extent = start_hint; | |
1669 | ||
1670 | if (!extent) { | |
1671 | extent = &s->extents[0]; | |
1672 | } | |
1673 | while (extent < &s->extents[s->num_extents]) { | |
1674 | if (sector_num < extent->end_sector) { | |
1675 | return extent; | |
1676 | } | |
1677 | extent++; | |
1678 | } | |
1679 | return NULL; | |
1680 | } | |
1681 | ||
a844a2b0 KW |
1682 | static inline uint64_t vmdk_find_offset_in_cluster(VmdkExtent *extent, |
1683 | int64_t offset) | |
1684 | { | |
9be38598 | 1685 | uint64_t extent_begin_offset, extent_relative_offset; |
a844a2b0 KW |
1686 | uint64_t cluster_size = extent->cluster_sectors * BDRV_SECTOR_SIZE; |
1687 | ||
1688 | extent_begin_offset = | |
1689 | (extent->end_sector - extent->sectors) * BDRV_SECTOR_SIZE; | |
1690 | extent_relative_offset = offset - extent_begin_offset; | |
9be38598 | 1691 | return extent_relative_offset % cluster_size; |
a844a2b0 KW |
1692 | } |
1693 | ||
c72080b9 EB |
1694 | static int coroutine_fn vmdk_co_block_status(BlockDriverState *bs, |
1695 | bool want_zero, | |
1696 | int64_t offset, int64_t bytes, | |
1697 | int64_t *pnum, int64_t *map, | |
1698 | BlockDriverState **file) | |
ea2384d3 FB |
1699 | { |
1700 | BDRVVmdkState *s = bs->opaque; | |
b3976d3c | 1701 | int64_t index_in_cluster, n, ret; |
c72080b9 | 1702 | uint64_t cluster_offset; |
b3976d3c FZ |
1703 | VmdkExtent *extent; |
1704 | ||
c72080b9 | 1705 | extent = find_extent(s, offset >> BDRV_SECTOR_BITS, NULL); |
b3976d3c | 1706 | if (!extent) { |
c72080b9 | 1707 | return -EIO; |
b3976d3c | 1708 | } |
f8a2e5e3 | 1709 | qemu_co_mutex_lock(&s->lock); |
c72080b9 | 1710 | ret = get_cluster_offset(bs, extent, NULL, offset, false, &cluster_offset, |
c6ac36e1 | 1711 | 0, 0); |
f8a2e5e3 | 1712 | qemu_co_mutex_unlock(&s->lock); |
14ead646 | 1713 | |
c72080b9 | 1714 | index_in_cluster = vmdk_find_offset_in_cluster(extent, offset); |
4bc74be9 PB |
1715 | switch (ret) { |
1716 | case VMDK_ERROR: | |
1717 | ret = -EIO; | |
1718 | break; | |
1719 | case VMDK_UNALLOC: | |
1720 | ret = 0; | |
1721 | break; | |
1722 | case VMDK_ZEROED: | |
1723 | ret = BDRV_BLOCK_ZERO; | |
1724 | break; | |
1725 | case VMDK_OK: | |
1726 | ret = BDRV_BLOCK_DATA; | |
e0f100f5 | 1727 | if (!extent->compressed) { |
d0a18f10 | 1728 | ret |= BDRV_BLOCK_OFFSET_VALID; |
c72080b9 | 1729 | *map = cluster_offset + index_in_cluster; |
4dd84ac9 HR |
1730 | if (extent->flat) { |
1731 | ret |= BDRV_BLOCK_RECURSE; | |
1732 | } | |
4bc74be9 | 1733 | } |
e0f100f5 | 1734 | *file = extent->file->bs; |
4bc74be9 PB |
1735 | break; |
1736 | } | |
91b85bd3 | 1737 | |
c72080b9 EB |
1738 | n = extent->cluster_sectors * BDRV_SECTOR_SIZE - index_in_cluster; |
1739 | *pnum = MIN(n, bytes); | |
b3976d3c | 1740 | return ret; |
ea2384d3 FB |
1741 | } |
1742 | ||
dd3f6ee2 | 1743 | static int vmdk_write_extent(VmdkExtent *extent, int64_t cluster_offset, |
37b1d7d8 KW |
1744 | int64_t offset_in_cluster, QEMUIOVector *qiov, |
1745 | uint64_t qiov_offset, uint64_t n_bytes, | |
1746 | uint64_t offset) | |
dd3f6ee2 FZ |
1747 | { |
1748 | int ret; | |
2b2c8c5d FZ |
1749 | VmdkGrainMarker *data = NULL; |
1750 | uLongf buf_len; | |
37b1d7d8 | 1751 | QEMUIOVector local_qiov; |
5e82a31e FZ |
1752 | int64_t write_offset; |
1753 | int64_t write_end_sector; | |
dd3f6ee2 | 1754 | |
2b2c8c5d | 1755 | if (extent->compressed) { |
37b1d7d8 KW |
1756 | void *compressed_data; |
1757 | ||
bedb8bb4 HR |
1758 | /* Only whole clusters */ |
1759 | if (offset_in_cluster || | |
1760 | n_bytes > (extent->cluster_sectors * SECTOR_SIZE) || | |
1761 | (n_bytes < (extent->cluster_sectors * SECTOR_SIZE) && | |
1762 | offset + n_bytes != extent->end_sector * SECTOR_SIZE)) | |
1763 | { | |
1764 | ret = -EINVAL; | |
1765 | goto out; | |
1766 | } | |
1767 | ||
2b2c8c5d FZ |
1768 | if (!extent->has_marker) { |
1769 | ret = -EINVAL; | |
1770 | goto out; | |
1771 | } | |
1772 | buf_len = (extent->cluster_sectors << 9) * 2; | |
1773 | data = g_malloc(buf_len + sizeof(VmdkGrainMarker)); | |
37b1d7d8 KW |
1774 | |
1775 | compressed_data = g_malloc(n_bytes); | |
1776 | qemu_iovec_to_buf(qiov, qiov_offset, compressed_data, n_bytes); | |
1777 | ret = compress(data->data, &buf_len, compressed_data, n_bytes); | |
1778 | g_free(compressed_data); | |
1779 | ||
1780 | if (ret != Z_OK || buf_len == 0) { | |
2b2c8c5d FZ |
1781 | ret = -EINVAL; |
1782 | goto out; | |
1783 | } | |
37b1d7d8 | 1784 | |
4545d4f4 QH |
1785 | data->lba = cpu_to_le64(offset >> BDRV_SECTOR_BITS); |
1786 | data->size = cpu_to_le32(buf_len); | |
37b1d7d8 KW |
1787 | |
1788 | n_bytes = buf_len + sizeof(VmdkGrainMarker); | |
199d95b0 | 1789 | qemu_iovec_init_buf(&local_qiov, data, n_bytes); |
23c4b2a8 HR |
1790 | |
1791 | BLKDBG_EVENT(extent->file, BLKDBG_WRITE_COMPRESSED); | |
37b1d7d8 KW |
1792 | } else { |
1793 | qemu_iovec_init(&local_qiov, qiov->niov); | |
1794 | qemu_iovec_concat(&local_qiov, qiov, qiov_offset, n_bytes); | |
23c4b2a8 HR |
1795 | |
1796 | BLKDBG_EVENT(extent->file, BLKDBG_WRITE_AIO); | |
2b2c8c5d | 1797 | } |
37b1d7d8 | 1798 | |
3c363575 | 1799 | write_offset = cluster_offset + offset_in_cluster; |
a03ef88f | 1800 | ret = bdrv_co_pwritev(extent->file, write_offset, n_bytes, |
37b1d7d8 | 1801 | &local_qiov, 0); |
5e82a31e | 1802 | |
37b1d7d8 | 1803 | write_end_sector = DIV_ROUND_UP(write_offset + n_bytes, BDRV_SECTOR_SIZE); |
5e82a31e | 1804 | |
3efffc32 RG |
1805 | if (extent->compressed) { |
1806 | extent->next_cluster_sector = write_end_sector; | |
1807 | } else { | |
1808 | extent->next_cluster_sector = MAX(extent->next_cluster_sector, | |
1809 | write_end_sector); | |
1810 | } | |
5e82a31e | 1811 | |
37b1d7d8 | 1812 | if (ret < 0) { |
dd3f6ee2 FZ |
1813 | goto out; |
1814 | } | |
1815 | ret = 0; | |
1816 | out: | |
2b2c8c5d | 1817 | g_free(data); |
37b1d7d8 KW |
1818 | if (!extent->compressed) { |
1819 | qemu_iovec_destroy(&local_qiov); | |
1820 | } | |
dd3f6ee2 FZ |
1821 | return ret; |
1822 | } | |
1823 | ||
1824 | static int vmdk_read_extent(VmdkExtent *extent, int64_t cluster_offset, | |
f10cc243 KW |
1825 | int64_t offset_in_cluster, QEMUIOVector *qiov, |
1826 | int bytes) | |
dd3f6ee2 FZ |
1827 | { |
1828 | int ret; | |
2b2c8c5d FZ |
1829 | int cluster_bytes, buf_bytes; |
1830 | uint8_t *cluster_buf, *compressed_data; | |
1831 | uint8_t *uncomp_buf; | |
1832 | uint32_t data_len; | |
1833 | VmdkGrainMarker *marker; | |
1834 | uLongf buf_len; | |
1835 | ||
dd3f6ee2 | 1836 | |
2b2c8c5d | 1837 | if (!extent->compressed) { |
23c4b2a8 | 1838 | BLKDBG_EVENT(extent->file, BLKDBG_READ_AIO); |
a03ef88f | 1839 | ret = bdrv_co_preadv(extent->file, |
f10cc243 KW |
1840 | cluster_offset + offset_in_cluster, bytes, |
1841 | qiov, 0); | |
1842 | if (ret < 0) { | |
1843 | return ret; | |
2b2c8c5d | 1844 | } |
f10cc243 | 1845 | return 0; |
2b2c8c5d FZ |
1846 | } |
1847 | cluster_bytes = extent->cluster_sectors * 512; | |
1848 | /* Read two clusters in case GrainMarker + compressed data > one cluster */ | |
1849 | buf_bytes = cluster_bytes * 2; | |
1850 | cluster_buf = g_malloc(buf_bytes); | |
1851 | uncomp_buf = g_malloc(cluster_bytes); | |
23c4b2a8 | 1852 | BLKDBG_EVENT(extent->file, BLKDBG_READ_COMPRESSED); |
cf2ab8fc | 1853 | ret = bdrv_pread(extent->file, |
2b2c8c5d FZ |
1854 | cluster_offset, |
1855 | cluster_buf, buf_bytes); | |
1856 | if (ret < 0) { | |
1857 | goto out; | |
1858 | } | |
1859 | compressed_data = cluster_buf; | |
1860 | buf_len = cluster_bytes; | |
1861 | data_len = cluster_bytes; | |
1862 | if (extent->has_marker) { | |
1863 | marker = (VmdkGrainMarker *)cluster_buf; | |
1864 | compressed_data = marker->data; | |
1865 | data_len = le32_to_cpu(marker->size); | |
1866 | } | |
1867 | if (!data_len || data_len > buf_bytes) { | |
1868 | ret = -EINVAL; | |
1869 | goto out; | |
1870 | } | |
1871 | ret = uncompress(uncomp_buf, &buf_len, compressed_data, data_len); | |
1872 | if (ret != Z_OK) { | |
1873 | ret = -EINVAL; | |
1874 | goto out; | |
1875 | ||
1876 | } | |
1877 | if (offset_in_cluster < 0 || | |
f10cc243 | 1878 | offset_in_cluster + bytes > buf_len) { |
2b2c8c5d FZ |
1879 | ret = -EINVAL; |
1880 | goto out; | |
dd3f6ee2 | 1881 | } |
f10cc243 | 1882 | qemu_iovec_from_buf(qiov, 0, uncomp_buf + offset_in_cluster, bytes); |
2b2c8c5d FZ |
1883 | ret = 0; |
1884 | ||
1885 | out: | |
1886 | g_free(uncomp_buf); | |
1887 | g_free(cluster_buf); | |
1888 | return ret; | |
dd3f6ee2 FZ |
1889 | } |
1890 | ||
f10cc243 | 1891 | static int coroutine_fn |
f7ef38dd VSO |
1892 | vmdk_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes, |
1893 | QEMUIOVector *qiov, BdrvRequestFlags flags) | |
ea2384d3 FB |
1894 | { |
1895 | BDRVVmdkState *s = bs->opaque; | |
b3976d3c | 1896 | int ret; |
f10cc243 | 1897 | uint64_t n_bytes, offset_in_cluster; |
b3976d3c | 1898 | VmdkExtent *extent = NULL; |
f10cc243 | 1899 | QEMUIOVector local_qiov; |
ea2384d3 | 1900 | uint64_t cluster_offset; |
f10cc243 | 1901 | uint64_t bytes_done = 0; |
5f4da8c0 | 1902 | |
f10cc243 KW |
1903 | qemu_iovec_init(&local_qiov, qiov->niov); |
1904 | qemu_co_mutex_lock(&s->lock); | |
1905 | ||
1906 | while (bytes > 0) { | |
1907 | extent = find_extent(s, offset >> BDRV_SECTOR_BITS, extent); | |
b3976d3c | 1908 | if (!extent) { |
f10cc243 KW |
1909 | ret = -EIO; |
1910 | goto fail; | |
b3976d3c | 1911 | } |
c6ac36e1 | 1912 | ret = get_cluster_offset(bs, extent, NULL, |
f10cc243 KW |
1913 | offset, false, &cluster_offset, 0, 0); |
1914 | offset_in_cluster = vmdk_find_offset_in_cluster(extent, offset); | |
1915 | ||
1916 | n_bytes = MIN(bytes, extent->cluster_sectors * BDRV_SECTOR_SIZE | |
1917 | - offset_in_cluster); | |
1918 | ||
14ead646 | 1919 | if (ret != VMDK_OK) { |
91b85bd3 | 1920 | /* if not allocated, try to read from parent image, if exist */ |
760e0063 | 1921 | if (bs->backing && ret != VMDK_ZEROED) { |
ae261c86 | 1922 | if (!vmdk_is_cid_valid(bs)) { |
f10cc243 KW |
1923 | ret = -EINVAL; |
1924 | goto fail; | |
ae261c86 | 1925 | } |
f10cc243 KW |
1926 | |
1927 | qemu_iovec_reset(&local_qiov); | |
1928 | qemu_iovec_concat(&local_qiov, qiov, bytes_done, n_bytes); | |
1929 | ||
23c4b2a8 HR |
1930 | /* qcow2 emits this on bs->file instead of bs->backing */ |
1931 | BLKDBG_EVENT(bs->file, BLKDBG_READ_BACKING_AIO); | |
a03ef88f | 1932 | ret = bdrv_co_preadv(bs->backing, offset, n_bytes, |
f10cc243 | 1933 | &local_qiov, 0); |
ae261c86 | 1934 | if (ret < 0) { |
f10cc243 | 1935 | goto fail; |
ae261c86 | 1936 | } |
5f4da8c0 | 1937 | } else { |
f10cc243 | 1938 | qemu_iovec_memset(qiov, bytes_done, 0, n_bytes); |
5f4da8c0 | 1939 | } |
ea2384d3 | 1940 | } else { |
f10cc243 KW |
1941 | qemu_iovec_reset(&local_qiov); |
1942 | qemu_iovec_concat(&local_qiov, qiov, bytes_done, n_bytes); | |
1943 | ||
1944 | ret = vmdk_read_extent(extent, cluster_offset, offset_in_cluster, | |
1945 | &local_qiov, n_bytes); | |
dd3f6ee2 | 1946 | if (ret) { |
f10cc243 | 1947 | goto fail; |
7fa60fa3 | 1948 | } |
ea2384d3 | 1949 | } |
f10cc243 KW |
1950 | bytes -= n_bytes; |
1951 | offset += n_bytes; | |
1952 | bytes_done += n_bytes; | |
ea2384d3 | 1953 | } |
ea2384d3 | 1954 | |
f10cc243 KW |
1955 | ret = 0; |
1956 | fail: | |
2914caa0 | 1957 | qemu_co_mutex_unlock(&s->lock); |
f10cc243 KW |
1958 | qemu_iovec_destroy(&local_qiov); |
1959 | ||
2914caa0 PB |
1960 | return ret; |
1961 | } | |
1962 | ||
cdeaf1f1 FZ |
1963 | /** |
1964 | * vmdk_write: | |
1965 | * @zeroed: buf is ignored (data is zero), use zeroed_grain GTE feature | |
8e507243 FZ |
1966 | * if possible, otherwise return -ENOTSUP. |
1967 | * @zero_dry_run: used for zeroed == true only, don't update L2 table, just try | |
1968 | * with each cluster. By dry run we can find if the zero write | |
1969 | * is possible without modifying image data. | |
cdeaf1f1 FZ |
1970 | * |
1971 | * Returns: error code with 0 for success. | |
1972 | */ | |
37b1d7d8 KW |
1973 | static int vmdk_pwritev(BlockDriverState *bs, uint64_t offset, |
1974 | uint64_t bytes, QEMUIOVector *qiov, | |
1975 | bool zeroed, bool zero_dry_run) | |
ea2384d3 | 1976 | { |
ff1afc72 | 1977 | BDRVVmdkState *s = bs->opaque; |
b3976d3c | 1978 | VmdkExtent *extent = NULL; |
585ea0c8 | 1979 | int ret; |
37b1d7d8 | 1980 | int64_t offset_in_cluster, n_bytes; |
ff1afc72 | 1981 | uint64_t cluster_offset; |
37b1d7d8 | 1982 | uint64_t bytes_done = 0; |
b3976d3c | 1983 | VmdkMetaData m_data; |
ff1afc72 | 1984 | |
37b1d7d8 KW |
1985 | if (DIV_ROUND_UP(offset, BDRV_SECTOR_SIZE) > bs->total_sectors) { |
1986 | error_report("Wrong offset: offset=0x%" PRIx64 | |
9af9e0fe | 1987 | " total_sectors=0x%" PRIx64, |
37b1d7d8 | 1988 | offset, bs->total_sectors); |
7fa60fa3 | 1989 | return -EIO; |
630530a6 TS |
1990 | } |
1991 | ||
37b1d7d8 KW |
1992 | while (bytes > 0) { |
1993 | extent = find_extent(s, offset >> BDRV_SECTOR_BITS, extent); | |
b3976d3c FZ |
1994 | if (!extent) { |
1995 | return -EIO; | |
1996 | } | |
98eb9733 SE |
1997 | if (extent->sesparse) { |
1998 | return -ENOTSUP; | |
1999 | } | |
37b1d7d8 KW |
2000 | offset_in_cluster = vmdk_find_offset_in_cluster(extent, offset); |
2001 | n_bytes = MIN(bytes, extent->cluster_sectors * BDRV_SECTOR_SIZE | |
2002 | - offset_in_cluster); | |
2003 | ||
2004 | ret = get_cluster_offset(bs, extent, &m_data, offset, | |
c6ac36e1 | 2005 | !(extent->compressed || zeroed), |
37b1d7d8 KW |
2006 | &cluster_offset, offset_in_cluster, |
2007 | offset_in_cluster + n_bytes); | |
2b2c8c5d | 2008 | if (extent->compressed) { |
65f74725 | 2009 | if (ret == VMDK_OK) { |
2b2c8c5d | 2010 | /* Refuse write to allocated cluster for streamOptimized */ |
4823970b FZ |
2011 | error_report("Could not write to allocated cluster" |
2012 | " for streamOptimized"); | |
2b2c8c5d | 2013 | return -EIO; |
2821c1cc | 2014 | } else if (!zeroed) { |
2b2c8c5d | 2015 | /* allocate */ |
37b1d7d8 | 2016 | ret = get_cluster_offset(bs, extent, &m_data, offset, |
c6ac36e1 | 2017 | true, &cluster_offset, 0, 0); |
2b2c8c5d FZ |
2018 | } |
2019 | } | |
cdeaf1f1 | 2020 | if (ret == VMDK_ERROR) { |
91b85bd3 | 2021 | return -EINVAL; |
b3976d3c | 2022 | } |
cdeaf1f1 FZ |
2023 | if (zeroed) { |
2024 | /* Do zeroed write, buf is ignored */ | |
2025 | if (extent->has_zero_grain && | |
37b1d7d8 KW |
2026 | offset_in_cluster == 0 && |
2027 | n_bytes >= extent->cluster_sectors * BDRV_SECTOR_SIZE) { | |
2028 | n_bytes = extent->cluster_sectors * BDRV_SECTOR_SIZE; | |
78cae78d | 2029 | if (!zero_dry_run && ret != VMDK_ZEROED) { |
cdeaf1f1 | 2030 | /* update L2 tables */ |
c6ac36e1 FZ |
2031 | if (vmdk_L2update(extent, &m_data, VMDK_GTE_ZEROED) |
2032 | != VMDK_OK) { | |
cdeaf1f1 FZ |
2033 | return -EIO; |
2034 | } | |
2035 | } | |
2036 | } else { | |
2037 | return -ENOTSUP; | |
2038 | } | |
2039 | } else { | |
37b1d7d8 KW |
2040 | ret = vmdk_write_extent(extent, cluster_offset, offset_in_cluster, |
2041 | qiov, bytes_done, n_bytes, offset); | |
cdeaf1f1 FZ |
2042 | if (ret) { |
2043 | return ret; | |
2044 | } | |
4dc20e64 | 2045 | if (m_data.new_allocation) { |
cdeaf1f1 | 2046 | /* update L2 tables */ |
c6ac36e1 FZ |
2047 | if (vmdk_L2update(extent, &m_data, |
2048 | cluster_offset >> BDRV_SECTOR_BITS) | |
2049 | != VMDK_OK) { | |
cdeaf1f1 FZ |
2050 | return -EIO; |
2051 | } | |
b3976d3c | 2052 | } |
630530a6 | 2053 | } |
37b1d7d8 KW |
2054 | bytes -= n_bytes; |
2055 | offset += n_bytes; | |
2056 | bytes_done += n_bytes; | |
5f4da8c0 | 2057 | |
ae261c86 FZ |
2058 | /* update CID on the first write every time the virtual disk is |
2059 | * opened */ | |
69b4d86d | 2060 | if (!s->cid_updated) { |
e5dc64b8 | 2061 | ret = vmdk_write_cid(bs, g_random_int()); |
99f1835d KW |
2062 | if (ret < 0) { |
2063 | return ret; | |
2064 | } | |
69b4d86d | 2065 | s->cid_updated = true; |
5f4da8c0 | 2066 | } |
ff1afc72 FB |
2067 | } |
2068 | return 0; | |
ea2384d3 FB |
2069 | } |
2070 | ||
37b1d7d8 | 2071 | static int coroutine_fn |
e75abeda VSO |
2072 | vmdk_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes, |
2073 | QEMUIOVector *qiov, BdrvRequestFlags flags) | |
e183ef75 PB |
2074 | { |
2075 | int ret; | |
2076 | BDRVVmdkState *s = bs->opaque; | |
2077 | qemu_co_mutex_lock(&s->lock); | |
37b1d7d8 | 2078 | ret = vmdk_pwritev(bs, offset, bytes, qiov, false, false); |
cdeaf1f1 FZ |
2079 | qemu_co_mutex_unlock(&s->lock); |
2080 | return ret; | |
2081 | } | |
2082 | ||
b2c622d3 | 2083 | static int coroutine_fn |
e75abeda VSO |
2084 | vmdk_co_pwritev_compressed(BlockDriverState *bs, int64_t offset, int64_t bytes, |
2085 | QEMUIOVector *qiov) | |
ba0ad89e | 2086 | { |
51b3c6b7 YCL |
2087 | if (bytes == 0) { |
2088 | /* The caller will write bytes 0 to signal EOF. | |
2089 | * When receive it, we align EOF to a sector boundary. */ | |
2090 | BDRVVmdkState *s = bs->opaque; | |
2091 | int i, ret; | |
2092 | int64_t length; | |
2093 | ||
2094 | for (i = 0; i < s->num_extents; i++) { | |
2095 | length = bdrv_getlength(s->extents[i].file->bs); | |
2096 | if (length < 0) { | |
2097 | return length; | |
2098 | } | |
2099 | length = QEMU_ALIGN_UP(length, BDRV_SECTOR_SIZE); | |
c80d8b06 | 2100 | ret = bdrv_truncate(s->extents[i].file, length, false, |
7b8e4857 | 2101 | PREALLOC_MODE_OFF, 0, NULL); |
51b3c6b7 YCL |
2102 | if (ret < 0) { |
2103 | return ret; | |
2104 | } | |
2105 | } | |
2106 | return 0; | |
2107 | } | |
b2c622d3 | 2108 | return vmdk_co_pwritev(bs, offset, bytes, qiov, 0); |
ba0ad89e FZ |
2109 | } |
2110 | ||
a620f2ae EB |
2111 | static int coroutine_fn vmdk_co_pwrite_zeroes(BlockDriverState *bs, |
2112 | int64_t offset, | |
f34b2bcf | 2113 | int64_t bytes, |
a620f2ae | 2114 | BdrvRequestFlags flags) |
cdeaf1f1 FZ |
2115 | { |
2116 | int ret; | |
2117 | BDRVVmdkState *s = bs->opaque; | |
37b1d7d8 | 2118 | |
cdeaf1f1 | 2119 | qemu_co_mutex_lock(&s->lock); |
8e507243 FZ |
2120 | /* write zeroes could fail if sectors not aligned to cluster, test it with |
2121 | * dry_run == true before really updating image */ | |
37b1d7d8 | 2122 | ret = vmdk_pwritev(bs, offset, bytes, NULL, true, true); |
cdeaf1f1 | 2123 | if (!ret) { |
37b1d7d8 | 2124 | ret = vmdk_pwritev(bs, offset, bytes, NULL, true, false); |
cdeaf1f1 | 2125 | } |
e183ef75 PB |
2126 | qemu_co_mutex_unlock(&s->lock); |
2127 | return ret; | |
2128 | } | |
2129 | ||
5be28490 FZ |
2130 | static int vmdk_init_extent(BlockBackend *blk, |
2131 | int64_t filesize, bool flat, | |
2132 | bool compress, bool zeroed_grain, | |
2133 | Error **errp) | |
8979b227 | 2134 | { |
f66fd6c3 | 2135 | int ret, i; |
8979b227 | 2136 | VMDK4Header header; |
917703c1 FZ |
2137 | uint32_t tmp, magic, grains, gd_sectors, gt_size, gt_count; |
2138 | uint32_t *gd_buf = NULL; | |
2139 | int gd_buf_size; | |
0e7e1989 | 2140 | |
f66fd6c3 | 2141 | if (flat) { |
8c6242b6 | 2142 | ret = blk_truncate(blk, filesize, false, PREALLOC_MODE_OFF, 0, errp); |
f66fd6c3 | 2143 | goto exit; |
5f4da8c0 | 2144 | } |
8979b227 FB |
2145 | magic = cpu_to_be32(VMDK4_MAGIC); |
2146 | memset(&header, 0, sizeof(header)); | |
d62d9dc4 FZ |
2147 | if (compress) { |
2148 | header.version = 3; | |
2149 | } else if (zeroed_grain) { | |
2150 | header.version = 2; | |
2151 | } else { | |
2152 | header.version = 1; | |
2153 | } | |
95b0aa42 | 2154 | header.flags = VMDK4_FLAG_RGD | VMDK4_FLAG_NL_DETECT |
69e0b6df FZ |
2155 | | (compress ? VMDK4_FLAG_COMPRESS | VMDK4_FLAG_MARKER : 0) |
2156 | | (zeroed_grain ? VMDK4_FLAG_ZERO_GRAIN : 0); | |
6c031aac | 2157 | header.compressAlgorithm = compress ? VMDK4_COMPRESSION_DEFLATE : 0; |
917703c1 | 2158 | header.capacity = filesize / BDRV_SECTOR_SIZE; |
16372ff0 | 2159 | header.granularity = 128; |
917703c1 | 2160 | header.num_gtes_per_gt = BDRV_SECTOR_SIZE; |
8979b227 | 2161 | |
917703c1 FZ |
2162 | grains = DIV_ROUND_UP(filesize / BDRV_SECTOR_SIZE, header.granularity); |
2163 | gt_size = DIV_ROUND_UP(header.num_gtes_per_gt * sizeof(uint32_t), | |
2164 | BDRV_SECTOR_SIZE); | |
2165 | gt_count = DIV_ROUND_UP(grains, header.num_gtes_per_gt); | |
2166 | gd_sectors = DIV_ROUND_UP(gt_count * sizeof(uint32_t), BDRV_SECTOR_SIZE); | |
8979b227 FB |
2167 | |
2168 | header.desc_offset = 1; | |
2169 | header.desc_size = 20; | |
2170 | header.rgd_offset = header.desc_offset + header.desc_size; | |
917703c1 | 2171 | header.gd_offset = header.rgd_offset + gd_sectors + (gt_size * gt_count); |
8979b227 | 2172 | header.grain_offset = |
917703c1 FZ |
2173 | ROUND_UP(header.gd_offset + gd_sectors + (gt_size * gt_count), |
2174 | header.granularity); | |
16372ff0 AG |
2175 | /* swap endianness for all header fields */ |
2176 | header.version = cpu_to_le32(header.version); | |
2177 | header.flags = cpu_to_le32(header.flags); | |
2178 | header.capacity = cpu_to_le64(header.capacity); | |
2179 | header.granularity = cpu_to_le64(header.granularity); | |
ca8804ce | 2180 | header.num_gtes_per_gt = cpu_to_le32(header.num_gtes_per_gt); |
8979b227 FB |
2181 | header.desc_offset = cpu_to_le64(header.desc_offset); |
2182 | header.desc_size = cpu_to_le64(header.desc_size); | |
2183 | header.rgd_offset = cpu_to_le64(header.rgd_offset); | |
2184 | header.gd_offset = cpu_to_le64(header.gd_offset); | |
2185 | header.grain_offset = cpu_to_le64(header.grain_offset); | |
6c031aac | 2186 | header.compressAlgorithm = cpu_to_le16(header.compressAlgorithm); |
8979b227 FB |
2187 | |
2188 | header.check_bytes[0] = 0xa; | |
2189 | header.check_bytes[1] = 0x20; | |
2190 | header.check_bytes[2] = 0xd; | |
2191 | header.check_bytes[3] = 0xa; | |
3b46e624 TS |
2192 | |
2193 | /* write all the data */ | |
8341f00d | 2194 | ret = blk_pwrite(blk, 0, &magic, sizeof(magic), 0); |
917703c1 | 2195 | if (ret < 0) { |
c6bd8c70 | 2196 | error_setg(errp, QERR_IO_ERROR); |
1640366c KS |
2197 | goto exit; |
2198 | } | |
8341f00d | 2199 | ret = blk_pwrite(blk, sizeof(magic), &header, sizeof(header), 0); |
917703c1 | 2200 | if (ret < 0) { |
c6bd8c70 | 2201 | error_setg(errp, QERR_IO_ERROR); |
1640366c KS |
2202 | goto exit; |
2203 | } | |
8979b227 | 2204 | |
c80d8b06 | 2205 | ret = blk_truncate(blk, le64_to_cpu(header.grain_offset) << 9, false, |
8c6242b6 | 2206 | PREALLOC_MODE_OFF, 0, errp); |
1640366c | 2207 | if (ret < 0) { |
1640366c KS |
2208 | goto exit; |
2209 | } | |
8979b227 FB |
2210 | |
2211 | /* write grain directory */ | |
917703c1 FZ |
2212 | gd_buf_size = gd_sectors * BDRV_SECTOR_SIZE; |
2213 | gd_buf = g_malloc0(gd_buf_size); | |
2214 | for (i = 0, tmp = le64_to_cpu(header.rgd_offset) + gd_sectors; | |
1640366c | 2215 | i < gt_count; i++, tmp += gt_size) { |
917703c1 FZ |
2216 | gd_buf[i] = cpu_to_le32(tmp); |
2217 | } | |
c4bea169 | 2218 | ret = blk_pwrite(blk, le64_to_cpu(header.rgd_offset) * BDRV_SECTOR_SIZE, |
8341f00d | 2219 | gd_buf, gd_buf_size, 0); |
917703c1 | 2220 | if (ret < 0) { |
c6bd8c70 | 2221 | error_setg(errp, QERR_IO_ERROR); |
917703c1 | 2222 | goto exit; |
1640366c | 2223 | } |
3b46e624 | 2224 | |
8979b227 | 2225 | /* write backup grain directory */ |
917703c1 | 2226 | for (i = 0, tmp = le64_to_cpu(header.gd_offset) + gd_sectors; |
1640366c | 2227 | i < gt_count; i++, tmp += gt_size) { |
917703c1 FZ |
2228 | gd_buf[i] = cpu_to_le32(tmp); |
2229 | } | |
c4bea169 | 2230 | ret = blk_pwrite(blk, le64_to_cpu(header.gd_offset) * BDRV_SECTOR_SIZE, |
8341f00d | 2231 | gd_buf, gd_buf_size, 0); |
917703c1 | 2232 | if (ret < 0) { |
c6bd8c70 | 2233 | error_setg(errp, QERR_IO_ERROR); |
1640366c | 2234 | } |
8979b227 | 2235 | |
f66fd6c3 | 2236 | ret = 0; |
5be28490 FZ |
2237 | exit: |
2238 | g_free(gd_buf); | |
2239 | return ret; | |
2240 | } | |
2241 | ||
2242 | static int vmdk_create_extent(const char *filename, int64_t filesize, | |
2243 | bool flat, bool compress, bool zeroed_grain, | |
2244 | BlockBackend **pbb, | |
2245 | QemuOpts *opts, Error **errp) | |
2246 | { | |
2247 | int ret; | |
2248 | BlockBackend *blk = NULL; | |
5be28490 | 2249 | |
668f62ec | 2250 | ret = bdrv_create_file(filename, opts, errp); |
5be28490 | 2251 | if (ret < 0) { |
5be28490 FZ |
2252 | goto exit; |
2253 | } | |
2254 | ||
2255 | blk = blk_new_open(filename, NULL, NULL, | |
2256 | BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL, | |
af175e85 | 2257 | errp); |
5be28490 | 2258 | if (blk == NULL) { |
5be28490 FZ |
2259 | ret = -EIO; |
2260 | goto exit; | |
2261 | } | |
2262 | ||
2263 | blk_set_allow_write_beyond_eof(blk, true); | |
2264 | ||
2265 | ret = vmdk_init_extent(blk, filesize, flat, compress, zeroed_grain, errp); | |
917703c1 | 2266 | exit: |
c4bea169 | 2267 | if (blk) { |
5be28490 FZ |
2268 | if (pbb) { |
2269 | *pbb = blk; | |
2270 | } else { | |
2271 | blk_unref(blk); | |
2272 | blk = NULL; | |
2273 | } | |
917703c1 | 2274 | } |
f66fd6c3 FZ |
2275 | return ret; |
2276 | } | |
2277 | ||
2278 | static int filename_decompose(const char *filename, char *path, char *prefix, | |
4823970b | 2279 | char *postfix, size_t buf_len, Error **errp) |
f66fd6c3 FZ |
2280 | { |
2281 | const char *p, *q; | |
2282 | ||
2283 | if (filename == NULL || !strlen(filename)) { | |
4823970b | 2284 | error_setg(errp, "No filename provided"); |
65f74725 | 2285 | return VMDK_ERROR; |
f66fd6c3 FZ |
2286 | } |
2287 | p = strrchr(filename, '/'); | |
2288 | if (p == NULL) { | |
2289 | p = strrchr(filename, '\\'); | |
2290 | } | |
2291 | if (p == NULL) { | |
2292 | p = strrchr(filename, ':'); | |
2293 | } | |
2294 | if (p != NULL) { | |
2295 | p++; | |
2296 | if (p - filename >= buf_len) { | |
65f74725 | 2297 | return VMDK_ERROR; |
f66fd6c3 FZ |
2298 | } |
2299 | pstrcpy(path, p - filename + 1, filename); | |
2300 | } else { | |
2301 | p = filename; | |
2302 | path[0] = '\0'; | |
2303 | } | |
2304 | q = strrchr(p, '.'); | |
2305 | if (q == NULL) { | |
2306 | pstrcpy(prefix, buf_len, p); | |
2307 | postfix[0] = '\0'; | |
2308 | } else { | |
2309 | if (q - p >= buf_len) { | |
65f74725 | 2310 | return VMDK_ERROR; |
f66fd6c3 FZ |
2311 | } |
2312 | pstrcpy(prefix, q - p + 1, p); | |
2313 | pstrcpy(postfix, buf_len, q); | |
2314 | } | |
65f74725 | 2315 | return VMDK_OK; |
f66fd6c3 FZ |
2316 | } |
2317 | ||
3015372d FZ |
2318 | /* |
2319 | * idx == 0: get or create the descriptor file (also the image file if in a | |
2320 | * non-split format. | |
2321 | * idx >= 1: get the n-th extent if in a split subformat | |
2322 | */ | |
2323 | typedef BlockBackend *(*vmdk_create_extent_fn)(int64_t size, | |
2324 | int idx, | |
2325 | bool flat, | |
2326 | bool split, | |
2327 | bool compress, | |
2328 | bool zeroed_grain, | |
2329 | void *opaque, | |
2330 | Error **errp); | |
2331 | ||
2332 | static void vmdk_desc_add_extent(GString *desc, | |
2333 | const char *extent_line_fmt, | |
2334 | int64_t size, const char *filename) | |
2335 | { | |
2336 | char *basename = g_path_get_basename(filename); | |
2337 | ||
2338 | g_string_append_printf(desc, extent_line_fmt, | |
2339 | DIV_ROUND_UP(size, BDRV_SECTOR_SIZE), basename); | |
2340 | g_free(basename); | |
2341 | } | |
2342 | ||
2343 | static int coroutine_fn vmdk_co_do_create(int64_t size, | |
2344 | BlockdevVmdkSubformat subformat, | |
2345 | BlockdevVmdkAdapterType adapter_type, | |
2346 | const char *backing_file, | |
2347 | const char *hw_version, | |
f3d43dfd | 2348 | const char *toolsversion, |
3015372d FZ |
2349 | bool compat6, |
2350 | bool zeroed_grain, | |
2351 | vmdk_create_extent_fn extent_fn, | |
2352 | void *opaque, | |
2353 | Error **errp) | |
f66fd6c3 | 2354 | { |
3015372d FZ |
2355 | int extent_idx; |
2356 | BlockBackend *blk = NULL; | |
4a960ece | 2357 | BlockBackend *extent_blk; |
c13959c7 | 2358 | Error *local_err = NULL; |
af057fe7 | 2359 | char *desc = NULL; |
f66fd6c3 | 2360 | int ret = 0; |
6c031aac | 2361 | bool flat, split, compress; |
af057fe7 | 2362 | GString *ext_desc_lines; |
f66fd6c3 | 2363 | const int64_t split_size = 0x80000000; /* VMDK has constant split size */ |
3015372d FZ |
2364 | int64_t extent_size; |
2365 | int64_t created_size = 0; | |
2366 | const char *extent_line_fmt; | |
fe206562 | 2367 | char *parent_desc_line = g_malloc0(BUF_SIZE); |
f66fd6c3 | 2368 | uint32_t parent_cid = 0xffffffff; |
7f2039f6 | 2369 | uint32_t number_heads = 16; |
917703c1 | 2370 | uint32_t desc_offset = 0, desc_len; |
f66fd6c3 FZ |
2371 | const char desc_template[] = |
2372 | "# Disk DescriptorFile\n" | |
2373 | "version=1\n" | |
9b17031a FZ |
2374 | "CID=%" PRIx32 "\n" |
2375 | "parentCID=%" PRIx32 "\n" | |
f66fd6c3 FZ |
2376 | "createType=\"%s\"\n" |
2377 | "%s" | |
2378 | "\n" | |
2379 | "# Extent description\n" | |
2380 | "%s" | |
2381 | "\n" | |
2382 | "# The Disk Data Base\n" | |
2383 | "#DDB\n" | |
2384 | "\n" | |
f249924e | 2385 | "ddb.virtualHWVersion = \"%s\"\n" |
f66fd6c3 | 2386 | "ddb.geometry.cylinders = \"%" PRId64 "\"\n" |
4ab9dab5 | 2387 | "ddb.geometry.heads = \"%" PRIu32 "\"\n" |
f66fd6c3 | 2388 | "ddb.geometry.sectors = \"63\"\n" |
f3d43dfd TW |
2389 | "ddb.adapterType = \"%s\"\n" |
2390 | "ddb.toolsVersion = \"%s\"\n"; | |
f66fd6c3 | 2391 | |
af057fe7 FZ |
2392 | ext_desc_lines = g_string_new(NULL); |
2393 | ||
f66fd6c3 | 2394 | /* Read out options */ |
3015372d FZ |
2395 | if (compat6) { |
2396 | if (hw_version) { | |
f249924e JK |
2397 | error_setg(errp, |
2398 | "compat6 cannot be enabled with hwversion set"); | |
2399 | ret = -EINVAL; | |
2400 | goto exit; | |
2401 | } | |
3015372d | 2402 | hw_version = "6"; |
5820f1da | 2403 | } |
3015372d FZ |
2404 | if (!hw_version) { |
2405 | hw_version = "4"; | |
f66fd6c3 | 2406 | } |
f3d43dfd TW |
2407 | if (!toolsversion) { |
2408 | toolsversion = "2147483647"; | |
2409 | } | |
5820f1da | 2410 | |
3015372d | 2411 | if (adapter_type != BLOCKDEV_VMDK_ADAPTER_TYPE_IDE) { |
7f2039f6 OP |
2412 | /* that's the number of heads with which vmware operates when |
2413 | creating, exporting, etc. vmdk files with a non-ide adapter type */ | |
2414 | number_heads = 255; | |
2415 | } | |
3015372d FZ |
2416 | split = (subformat == BLOCKDEV_VMDK_SUBFORMAT_TWOGBMAXEXTENTFLAT) || |
2417 | (subformat == BLOCKDEV_VMDK_SUBFORMAT_TWOGBMAXEXTENTSPARSE); | |
2418 | flat = (subformat == BLOCKDEV_VMDK_SUBFORMAT_MONOLITHICFLAT) || | |
2419 | (subformat == BLOCKDEV_VMDK_SUBFORMAT_TWOGBMAXEXTENTFLAT); | |
2420 | compress = subformat == BLOCKDEV_VMDK_SUBFORMAT_STREAMOPTIMIZED; | |
2421 | ||
f66fd6c3 | 2422 | if (flat) { |
3015372d | 2423 | extent_line_fmt = "RW %" PRId64 " FLAT \"%s\" 0\n"; |
f66fd6c3 | 2424 | } else { |
3015372d | 2425 | extent_line_fmt = "RW %" PRId64 " SPARSE \"%s\"\n"; |
f66fd6c3 FZ |
2426 | } |
2427 | if (flat && backing_file) { | |
4823970b | 2428 | error_setg(errp, "Flat image can't have backing file"); |
af057fe7 FZ |
2429 | ret = -ENOTSUP; |
2430 | goto exit; | |
f66fd6c3 | 2431 | } |
52c8d629 FZ |
2432 | if (flat && zeroed_grain) { |
2433 | error_setg(errp, "Flat image can't enable zeroed grain"); | |
af057fe7 FZ |
2434 | ret = -ENOTSUP; |
2435 | goto exit; | |
52c8d629 | 2436 | } |
3015372d FZ |
2437 | |
2438 | /* Create extents */ | |
2439 | if (split) { | |
2440 | extent_size = split_size; | |
2441 | } else { | |
2442 | extent_size = size; | |
2443 | } | |
2444 | if (!split && !flat) { | |
2445 | created_size = extent_size; | |
2446 | } else { | |
2447 | created_size = 0; | |
2448 | } | |
2449 | /* Get the descriptor file BDS */ | |
2450 | blk = extent_fn(created_size, 0, flat, split, compress, zeroed_grain, | |
2451 | opaque, errp); | |
2452 | if (!blk) { | |
2453 | ret = -EIO; | |
2454 | goto exit; | |
2455 | } | |
2456 | if (!split && !flat) { | |
2457 | vmdk_desc_add_extent(ext_desc_lines, extent_line_fmt, created_size, | |
2458 | blk_bs(blk)->filename); | |
2459 | } | |
2460 | ||
f66fd6c3 | 2461 | if (backing_file) { |
3015372d | 2462 | BlockBackend *backing; |
645ae7d8 HR |
2463 | char *full_backing = |
2464 | bdrv_get_full_backing_filename_from_filename(blk_bs(blk)->filename, | |
2465 | backing_file, | |
2466 | &local_err); | |
1085daf9 | 2467 | if (local_err) { |
1085daf9 HR |
2468 | error_propagate(errp, local_err); |
2469 | ret = -ENOENT; | |
2470 | goto exit; | |
2471 | } | |
645ae7d8 | 2472 | assert(full_backing); |
c4bea169 | 2473 | |
3015372d FZ |
2474 | backing = blk_new_open(full_backing, NULL, NULL, |
2475 | BDRV_O_NO_BACKING, errp); | |
1085daf9 | 2476 | g_free(full_backing); |
3015372d | 2477 | if (backing == NULL) { |
c4bea169 | 2478 | ret = -EIO; |
af057fe7 | 2479 | goto exit; |
f66fd6c3 | 2480 | } |
3015372d FZ |
2481 | if (strcmp(blk_bs(backing)->drv->format_name, "vmdk")) { |
2482 | error_setg(errp, "Invalid backing file format: %s. Must be vmdk", | |
2483 | blk_bs(backing)->drv->format_name); | |
2484 | blk_unref(backing); | |
af057fe7 FZ |
2485 | ret = -EINVAL; |
2486 | goto exit; | |
f66fd6c3 | 2487 | } |
3015372d FZ |
2488 | ret = vmdk_read_cid(blk_bs(backing), 0, &parent_cid); |
2489 | blk_unref(backing); | |
9877860e | 2490 | if (ret) { |
3015372d | 2491 | error_setg(errp, "Failed to read parent CID"); |
9877860e PM |
2492 | goto exit; |
2493 | } | |
fe206562 | 2494 | snprintf(parent_desc_line, BUF_SIZE, |
8ed610a1 | 2495 | "parentFileNameHint=\"%s\"", backing_file); |
f66fd6c3 | 2496 | } |
3015372d FZ |
2497 | extent_idx = 1; |
2498 | while (created_size < size) { | |
3015372d FZ |
2499 | int64_t cur_size = MIN(size - created_size, extent_size); |
2500 | extent_blk = extent_fn(cur_size, extent_idx, flat, split, compress, | |
2501 | zeroed_grain, opaque, errp); | |
2502 | if (!extent_blk) { | |
af057fe7 FZ |
2503 | ret = -EINVAL; |
2504 | goto exit; | |
f66fd6c3 | 2505 | } |
3015372d FZ |
2506 | vmdk_desc_add_extent(ext_desc_lines, extent_line_fmt, cur_size, |
2507 | blk_bs(extent_blk)->filename); | |
2508 | created_size += cur_size; | |
2509 | extent_idx++; | |
2510 | blk_unref(extent_blk); | |
f66fd6c3 | 2511 | } |
4a960ece KW |
2512 | |
2513 | /* Check whether we got excess extents */ | |
2514 | extent_blk = extent_fn(-1, extent_idx, flat, split, compress, zeroed_grain, | |
2515 | opaque, NULL); | |
2516 | if (extent_blk) { | |
2517 | blk_unref(extent_blk); | |
2518 | error_setg(errp, "List of extents contains unused extents"); | |
2519 | ret = -EINVAL; | |
2520 | goto exit; | |
2521 | } | |
2522 | ||
f66fd6c3 | 2523 | /* generate descriptor file */ |
af057fe7 | 2524 | desc = g_strdup_printf(desc_template, |
e5dc64b8 | 2525 | g_random_int(), |
af057fe7 | 2526 | parent_cid, |
3015372d | 2527 | BlockdevVmdkSubformat_str(subformat), |
af057fe7 FZ |
2528 | parent_desc_line, |
2529 | ext_desc_lines->str, | |
f249924e | 2530 | hw_version, |
3015372d | 2531 | size / |
917703c1 | 2532 | (int64_t)(63 * number_heads * BDRV_SECTOR_SIZE), |
af057fe7 | 2533 | number_heads, |
f3d43dfd TW |
2534 | BlockdevVmdkAdapterType_str(adapter_type), |
2535 | toolsversion); | |
917703c1 FZ |
2536 | desc_len = strlen(desc); |
2537 | /* the descriptor offset = 0x200 */ | |
2538 | if (!split && !flat) { | |
2539 | desc_offset = 0x200; | |
3015372d FZ |
2540 | } |
2541 | ||
2542 | ret = blk_pwrite(blk, desc_offset, desc, desc_len, 0); | |
2543 | if (ret < 0) { | |
2544 | error_setg_errno(errp, -ret, "Could not write description"); | |
2545 | goto exit; | |
2546 | } | |
2547 | /* bdrv_pwrite write padding zeros to align to sector, we don't need that | |
2548 | * for description file */ | |
2549 | if (desc_offset == 0) { | |
8c6242b6 | 2550 | ret = blk_truncate(blk, desc_len, false, PREALLOC_MODE_OFF, 0, errp); |
917703c1 | 2551 | if (ret < 0) { |
917703c1 FZ |
2552 | goto exit; |
2553 | } | |
f66fd6c3 | 2554 | } |
3015372d FZ |
2555 | ret = 0; |
2556 | exit: | |
2557 | if (blk) { | |
2558 | blk_unref(blk); | |
2559 | } | |
2560 | g_free(desc); | |
2561 | g_free(parent_desc_line); | |
2562 | g_string_free(ext_desc_lines, true); | |
2563 | return ret; | |
2564 | } | |
c4bea169 | 2565 | |
3015372d FZ |
2566 | typedef struct { |
2567 | char *path; | |
2568 | char *prefix; | |
2569 | char *postfix; | |
2570 | QemuOpts *opts; | |
2571 | } VMDKCreateOptsData; | |
2572 | ||
2573 | static BlockBackend *vmdk_co_create_opts_cb(int64_t size, int idx, | |
2574 | bool flat, bool split, bool compress, | |
2575 | bool zeroed_grain, void *opaque, | |
2576 | Error **errp) | |
2577 | { | |
2578 | BlockBackend *blk = NULL; | |
2579 | BlockDriverState *bs = NULL; | |
2580 | VMDKCreateOptsData *data = opaque; | |
2581 | char *ext_filename = NULL; | |
2582 | char *rel_filename = NULL; | |
2583 | ||
4a960ece KW |
2584 | /* We're done, don't create excess extents. */ |
2585 | if (size == -1) { | |
2586 | assert(errp == NULL); | |
2587 | return NULL; | |
2588 | } | |
2589 | ||
3015372d FZ |
2590 | if (idx == 0) { |
2591 | rel_filename = g_strdup_printf("%s%s", data->prefix, data->postfix); | |
2592 | } else if (split) { | |
2593 | rel_filename = g_strdup_printf("%s-%c%03d%s", | |
2594 | data->prefix, | |
2595 | flat ? 'f' : 's', idx, data->postfix); | |
2596 | } else { | |
2597 | assert(idx == 1); | |
2598 | rel_filename = g_strdup_printf("%s-flat%s", data->prefix, data->postfix); | |
2599 | } | |
2600 | ||
2601 | ext_filename = g_strdup_printf("%s%s", data->path, rel_filename); | |
2602 | g_free(rel_filename); | |
2603 | ||
2604 | if (vmdk_create_extent(ext_filename, size, | |
2605 | flat, compress, zeroed_grain, &blk, data->opts, | |
2606 | errp)) { | |
af057fe7 | 2607 | goto exit; |
f66fd6c3 | 2608 | } |
3015372d FZ |
2609 | bdrv_unref(bs); |
2610 | exit: | |
2611 | g_free(ext_filename); | |
2612 | return blk; | |
2613 | } | |
c4bea169 | 2614 | |
b92902df ML |
2615 | static int coroutine_fn vmdk_co_create_opts(BlockDriver *drv, |
2616 | const char *filename, | |
2617 | QemuOpts *opts, | |
3015372d FZ |
2618 | Error **errp) |
2619 | { | |
2620 | Error *local_err = NULL; | |
2621 | char *desc = NULL; | |
2622 | int64_t total_size = 0; | |
2623 | char *adapter_type = NULL; | |
2624 | BlockdevVmdkAdapterType adapter_type_enum; | |
2625 | char *backing_file = NULL; | |
2626 | char *hw_version = NULL; | |
f3d43dfd | 2627 | char *toolsversion = NULL; |
3015372d FZ |
2628 | char *fmt = NULL; |
2629 | BlockdevVmdkSubformat subformat; | |
2630 | int ret = 0; | |
2631 | char *path = g_malloc0(PATH_MAX); | |
2632 | char *prefix = g_malloc0(PATH_MAX); | |
2633 | char *postfix = g_malloc0(PATH_MAX); | |
2634 | char *desc_line = g_malloc0(BUF_SIZE); | |
2635 | char *ext_filename = g_malloc0(PATH_MAX); | |
2636 | char *desc_filename = g_malloc0(PATH_MAX); | |
2637 | char *parent_desc_line = g_malloc0(BUF_SIZE); | |
2638 | bool zeroed_grain; | |
2639 | bool compat6; | |
2640 | VMDKCreateOptsData data; | |
d51a814c EB |
2641 | char *backing_fmt = NULL; |
2642 | ||
2643 | backing_fmt = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FMT); | |
2644 | if (backing_fmt && strcmp(backing_fmt, "vmdk") != 0) { | |
2645 | error_setg(errp, "backing_file must be a vmdk image"); | |
2646 | ret = -EINVAL; | |
2647 | goto exit; | |
2648 | } | |
c4bea169 | 2649 | |
3015372d FZ |
2650 | if (filename_decompose(filename, path, prefix, postfix, PATH_MAX, errp)) { |
2651 | ret = -EINVAL; | |
917703c1 | 2652 | goto exit; |
f66fd6c3 | 2653 | } |
3015372d FZ |
2654 | /* Read out options */ |
2655 | total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), | |
2656 | BDRV_SECTOR_SIZE); | |
2657 | adapter_type = qemu_opt_get_del(opts, BLOCK_OPT_ADAPTER_TYPE); | |
2658 | backing_file = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FILE); | |
2659 | hw_version = qemu_opt_get_del(opts, BLOCK_OPT_HWVERSION); | |
f3d43dfd | 2660 | toolsversion = qemu_opt_get_del(opts, BLOCK_OPT_TOOLSVERSION); |
3015372d FZ |
2661 | compat6 = qemu_opt_get_bool_del(opts, BLOCK_OPT_COMPAT6, false); |
2662 | if (strcmp(hw_version, "undefined") == 0) { | |
2663 | g_free(hw_version); | |
26c9296c | 2664 | hw_version = NULL; |
1640366c | 2665 | } |
3015372d FZ |
2666 | fmt = qemu_opt_get_del(opts, BLOCK_OPT_SUBFMT); |
2667 | zeroed_grain = qemu_opt_get_bool_del(opts, BLOCK_OPT_ZEROED_GRAIN, false); | |
2668 | ||
2669 | if (adapter_type) { | |
2670 | adapter_type_enum = qapi_enum_parse(&BlockdevVmdkAdapterType_lookup, | |
2671 | adapter_type, | |
2672 | BLOCKDEV_VMDK_ADAPTER_TYPE_IDE, | |
2673 | &local_err); | |
2674 | if (local_err) { | |
2675 | error_propagate(errp, local_err); | |
2676 | ret = -EINVAL; | |
2677 | goto exit; | |
2678 | } | |
2679 | } else { | |
2680 | adapter_type_enum = BLOCKDEV_VMDK_ADAPTER_TYPE_IDE; | |
917703c1 | 2681 | } |
3015372d FZ |
2682 | |
2683 | if (!fmt) { | |
2684 | /* Default format to monolithicSparse */ | |
2685 | subformat = BLOCKDEV_VMDK_SUBFORMAT_MONOLITHICSPARSE; | |
2686 | } else { | |
2687 | subformat = qapi_enum_parse(&BlockdevVmdkSubformat_lookup, | |
2688 | fmt, | |
2689 | BLOCKDEV_VMDK_SUBFORMAT_MONOLITHICSPARSE, | |
2690 | &local_err); | |
2691 | if (local_err) { | |
2692 | error_propagate(errp, local_err); | |
2693 | ret = -EINVAL; | |
2694 | goto exit; | |
2695 | } | |
2696 | } | |
2697 | data = (VMDKCreateOptsData){ | |
2698 | .prefix = prefix, | |
2699 | .postfix = postfix, | |
2700 | .path = path, | |
2701 | .opts = opts, | |
2702 | }; | |
2703 | ret = vmdk_co_do_create(total_size, subformat, adapter_type_enum, | |
f3d43dfd TW |
2704 | backing_file, hw_version, toolsversion, compat6, |
2705 | zeroed_grain, vmdk_co_create_opts_cb, &data, errp); | |
3015372d FZ |
2706 | |
2707 | exit: | |
d51a814c | 2708 | g_free(backing_fmt); |
5820f1da CL |
2709 | g_free(adapter_type); |
2710 | g_free(backing_file); | |
f249924e | 2711 | g_free(hw_version); |
f3d43dfd | 2712 | g_free(toolsversion); |
5820f1da | 2713 | g_free(fmt); |
af057fe7 | 2714 | g_free(desc); |
fe206562 JC |
2715 | g_free(path); |
2716 | g_free(prefix); | |
2717 | g_free(postfix); | |
2718 | g_free(desc_line); | |
2719 | g_free(ext_filename); | |
2720 | g_free(desc_filename); | |
2721 | g_free(parent_desc_line); | |
3015372d FZ |
2722 | return ret; |
2723 | } | |
2724 | ||
2725 | static BlockBackend *vmdk_co_create_cb(int64_t size, int idx, | |
2726 | bool flat, bool split, bool compress, | |
2727 | bool zeroed_grain, void *opaque, | |
2728 | Error **errp) | |
2729 | { | |
2730 | int ret; | |
2731 | BlockDriverState *bs; | |
2732 | BlockBackend *blk; | |
2733 | BlockdevCreateOptionsVmdk *opts = opaque; | |
2734 | ||
2735 | if (idx == 0) { | |
2736 | bs = bdrv_open_blockdev_ref(opts->file, errp); | |
2737 | } else { | |
2738 | int i; | |
2739 | BlockdevRefList *list = opts->extents; | |
2740 | for (i = 1; i < idx; i++) { | |
2741 | if (!list || !list->next) { | |
2742 | error_setg(errp, "Extent [%d] not specified", i); | |
2743 | return NULL; | |
2744 | } | |
2745 | list = list->next; | |
2746 | } | |
2747 | if (!list) { | |
2748 | error_setg(errp, "Extent [%d] not specified", idx - 1); | |
2749 | return NULL; | |
2750 | } | |
2751 | bs = bdrv_open_blockdev_ref(list->value, errp); | |
2752 | } | |
2753 | if (!bs) { | |
2754 | return NULL; | |
2755 | } | |
a3aeeab5 EB |
2756 | blk = blk_new_with_bs(bs, |
2757 | BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE | BLK_PERM_RESIZE, | |
2758 | BLK_PERM_ALL, errp); | |
2759 | if (!blk) { | |
3015372d FZ |
2760 | return NULL; |
2761 | } | |
2762 | blk_set_allow_write_beyond_eof(blk, true); | |
2763 | bdrv_unref(bs); | |
2764 | ||
4a960ece KW |
2765 | if (size != -1) { |
2766 | ret = vmdk_init_extent(blk, size, flat, compress, zeroed_grain, errp); | |
2767 | if (ret) { | |
2768 | blk_unref(blk); | |
2769 | blk = NULL; | |
2770 | } | |
3015372d FZ |
2771 | } |
2772 | return blk; | |
2773 | } | |
2774 | ||
2775 | static int coroutine_fn vmdk_co_create(BlockdevCreateOptions *create_options, | |
2776 | Error **errp) | |
2777 | { | |
2778 | int ret; | |
2779 | BlockdevCreateOptionsVmdk *opts; | |
2780 | ||
2781 | opts = &create_options->u.vmdk; | |
2782 | ||
2783 | /* Validate options */ | |
2784 | if (!QEMU_IS_ALIGNED(opts->size, BDRV_SECTOR_SIZE)) { | |
2785 | error_setg(errp, "Image size must be a multiple of 512 bytes"); | |
2786 | ret = -EINVAL; | |
2787 | goto out; | |
2788 | } | |
2789 | ||
2790 | ret = vmdk_co_do_create(opts->size, | |
2791 | opts->subformat, | |
2792 | opts->adapter_type, | |
2793 | opts->backing_file, | |
2794 | opts->hwversion, | |
f3d43dfd | 2795 | opts->toolsversion, |
3015372d FZ |
2796 | false, |
2797 | opts->zeroed_grain, | |
2798 | vmdk_co_create_cb, | |
2799 | opts, errp); | |
2800 | return ret; | |
2801 | ||
2802 | out: | |
1640366c | 2803 | return ret; |
8979b227 FB |
2804 | } |
2805 | ||
e2731add | 2806 | static void vmdk_close(BlockDriverState *bs) |
ea2384d3 | 2807 | { |
2bc3166c KW |
2808 | BDRVVmdkState *s = bs->opaque; |
2809 | ||
b3976d3c | 2810 | vmdk_free_extents(bs); |
f4c129a3 | 2811 | g_free(s->create_type); |
2bc3166c KW |
2812 | |
2813 | migrate_del_blocker(s->migration_blocker); | |
2814 | error_free(s->migration_blocker); | |
ea2384d3 FB |
2815 | } |
2816 | ||
4a1d5e1f FZ |
2817 | static int64_t vmdk_get_allocated_file_size(BlockDriverState *bs) |
2818 | { | |
2819 | int i; | |
2820 | int64_t ret = 0; | |
2821 | int64_t r; | |
2822 | BDRVVmdkState *s = bs->opaque; | |
2823 | ||
9a4f4c31 | 2824 | ret = bdrv_get_allocated_file_size(bs->file->bs); |
4a1d5e1f FZ |
2825 | if (ret < 0) { |
2826 | return ret; | |
2827 | } | |
2828 | for (i = 0; i < s->num_extents; i++) { | |
9a4f4c31 | 2829 | if (s->extents[i].file == bs->file) { |
4a1d5e1f FZ |
2830 | continue; |
2831 | } | |
24bc15d1 | 2832 | r = bdrv_get_allocated_file_size(s->extents[i].file->bs); |
4a1d5e1f FZ |
2833 | if (r < 0) { |
2834 | return r; | |
2835 | } | |
2836 | ret += r; | |
2837 | } | |
2838 | return ret; | |
2839 | } | |
0e7e1989 | 2840 | |
da7a50f9 FZ |
2841 | static int vmdk_has_zero_init(BlockDriverState *bs) |
2842 | { | |
2843 | int i; | |
2844 | BDRVVmdkState *s = bs->opaque; | |
2845 | ||
2846 | /* If has a flat extent and its underlying storage doesn't have zero init, | |
2847 | * return 0. */ | |
2848 | for (i = 0; i < s->num_extents; i++) { | |
2849 | if (s->extents[i].flat) { | |
24bc15d1 | 2850 | if (!bdrv_has_zero_init(s->extents[i].file->bs)) { |
da7a50f9 FZ |
2851 | return 0; |
2852 | } | |
2853 | } | |
2854 | } | |
2855 | return 1; | |
2856 | } | |
2857 | ||
f4c129a3 FZ |
2858 | static ImageInfo *vmdk_get_extent_info(VmdkExtent *extent) |
2859 | { | |
2860 | ImageInfo *info = g_new0(ImageInfo, 1); | |
2861 | ||
f30c66ba | 2862 | bdrv_refresh_filename(extent->file->bs); |
f4c129a3 | 2863 | *info = (ImageInfo){ |
24bc15d1 | 2864 | .filename = g_strdup(extent->file->bs->filename), |
f4c129a3 FZ |
2865 | .format = g_strdup(extent->type), |
2866 | .virtual_size = extent->sectors * BDRV_SECTOR_SIZE, | |
2867 | .compressed = extent->compressed, | |
2868 | .has_compressed = extent->compressed, | |
2869 | .cluster_size = extent->cluster_sectors * BDRV_SECTOR_SIZE, | |
2870 | .has_cluster_size = !extent->flat, | |
2871 | }; | |
2872 | ||
2873 | return info; | |
2874 | } | |
2875 | ||
2fd61638 PB |
2876 | static int coroutine_fn vmdk_co_check(BlockDriverState *bs, |
2877 | BdrvCheckResult *result, | |
2878 | BdrvCheckMode fix) | |
f43aa8e1 PL |
2879 | { |
2880 | BDRVVmdkState *s = bs->opaque; | |
2881 | VmdkExtent *extent = NULL; | |
2882 | int64_t sector_num = 0; | |
57322b78 | 2883 | int64_t total_sectors = bdrv_nb_sectors(bs); |
f43aa8e1 PL |
2884 | int ret; |
2885 | uint64_t cluster_offset; | |
2886 | ||
2887 | if (fix) { | |
2888 | return -ENOTSUP; | |
2889 | } | |
2890 | ||
2891 | for (;;) { | |
2892 | if (sector_num >= total_sectors) { | |
2893 | return 0; | |
2894 | } | |
2895 | extent = find_extent(s, sector_num, extent); | |
2896 | if (!extent) { | |
2897 | fprintf(stderr, | |
2898 | "ERROR: could not find extent for sector %" PRId64 "\n", | |
2899 | sector_num); | |
0e51b9b7 | 2900 | ret = -EINVAL; |
f43aa8e1 PL |
2901 | break; |
2902 | } | |
2903 | ret = get_cluster_offset(bs, extent, NULL, | |
2904 | sector_num << BDRV_SECTOR_BITS, | |
c6ac36e1 | 2905 | false, &cluster_offset, 0, 0); |
f43aa8e1 PL |
2906 | if (ret == VMDK_ERROR) { |
2907 | fprintf(stderr, | |
2908 | "ERROR: could not get cluster_offset for sector %" | |
2909 | PRId64 "\n", sector_num); | |
2910 | break; | |
2911 | } | |
0e51b9b7 FZ |
2912 | if (ret == VMDK_OK) { |
2913 | int64_t extent_len = bdrv_getlength(extent->file->bs); | |
2914 | if (extent_len < 0) { | |
2915 | fprintf(stderr, | |
2916 | "ERROR: could not get extent file length for sector %" | |
2917 | PRId64 "\n", sector_num); | |
2918 | ret = extent_len; | |
2919 | break; | |
2920 | } | |
2921 | if (cluster_offset >= extent_len) { | |
2922 | fprintf(stderr, | |
2923 | "ERROR: cluster offset for sector %" | |
2924 | PRId64 " points after EOF\n", sector_num); | |
2925 | ret = -EINVAL; | |
2926 | break; | |
2927 | } | |
f43aa8e1 PL |
2928 | } |
2929 | sector_num += extent->cluster_sectors; | |
2930 | } | |
2931 | ||
2932 | result->corruptions++; | |
0e51b9b7 | 2933 | return ret; |
f43aa8e1 PL |
2934 | } |
2935 | ||
1bf6e9ca AS |
2936 | static ImageInfoSpecific *vmdk_get_specific_info(BlockDriverState *bs, |
2937 | Error **errp) | |
f4c129a3 FZ |
2938 | { |
2939 | int i; | |
2940 | BDRVVmdkState *s = bs->opaque; | |
2941 | ImageInfoSpecific *spec_info = g_new0(ImageInfoSpecific, 1); | |
c3033fd3 | 2942 | ImageInfoList **tail; |
f4c129a3 FZ |
2943 | |
2944 | *spec_info = (ImageInfoSpecific){ | |
6a8f9661 | 2945 | .type = IMAGE_INFO_SPECIFIC_KIND_VMDK, |
32bafa8f EB |
2946 | .u = { |
2947 | .vmdk.data = g_new0(ImageInfoSpecificVmdk, 1), | |
f4c129a3 FZ |
2948 | }, |
2949 | }; | |
2950 | ||
32bafa8f | 2951 | *spec_info->u.vmdk.data = (ImageInfoSpecificVmdk) { |
f4c129a3 FZ |
2952 | .create_type = g_strdup(s->create_type), |
2953 | .cid = s->cid, | |
2954 | .parent_cid = s->parent_cid, | |
2955 | }; | |
2956 | ||
c3033fd3 | 2957 | tail = &spec_info->u.vmdk.data->extents; |
f4c129a3 | 2958 | for (i = 0; i < s->num_extents; i++) { |
c3033fd3 | 2959 | QAPI_LIST_APPEND(tail, vmdk_get_extent_info(&s->extents[i])); |
f4c129a3 FZ |
2960 | } |
2961 | ||
2962 | return spec_info; | |
2963 | } | |
2964 | ||
5f583307 FZ |
2965 | static bool vmdk_extents_type_eq(const VmdkExtent *a, const VmdkExtent *b) |
2966 | { | |
2967 | return a->flat == b->flat && | |
2968 | a->compressed == b->compressed && | |
2969 | (a->flat || a->cluster_sectors == b->cluster_sectors); | |
2970 | } | |
2971 | ||
74fe188c FZ |
2972 | static int vmdk_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) |
2973 | { | |
2974 | int i; | |
2975 | BDRVVmdkState *s = bs->opaque; | |
2976 | assert(s->num_extents); | |
5f583307 | 2977 | |
74fe188c FZ |
2978 | /* See if we have multiple extents but they have different cases */ |
2979 | for (i = 1; i < s->num_extents; i++) { | |
5f583307 | 2980 | if (!vmdk_extents_type_eq(&s->extents[0], &s->extents[i])) { |
74fe188c FZ |
2981 | return -ENOTSUP; |
2982 | } | |
2983 | } | |
5f583307 FZ |
2984 | bdi->needs_compressed_writes = s->extents[0].compressed; |
2985 | if (!s->extents[0].flat) { | |
2986 | bdi->cluster_size = s->extents[0].cluster_sectors << BDRV_SECTOR_BITS; | |
2987 | } | |
74fe188c FZ |
2988 | return 0; |
2989 | } | |
2990 | ||
abc521a9 HR |
2991 | static void vmdk_gather_child_options(BlockDriverState *bs, QDict *target, |
2992 | bool backing_overridden) | |
2993 | { | |
2994 | /* No children but file and backing can be explicitly specified (TODO) */ | |
2995 | qdict_put(target, "file", | |
2996 | qobject_ref(bs->file->bs->full_open_options)); | |
2997 | ||
2998 | if (backing_overridden) { | |
2999 | if (bs->backing) { | |
3000 | qdict_put(target, "backing", | |
3001 | qobject_ref(bs->backing->bs->full_open_options)); | |
3002 | } else { | |
3003 | qdict_put_null(target, "backing"); | |
3004 | } | |
3005 | } | |
3006 | } | |
3007 | ||
5820f1da CL |
3008 | static QemuOptsList vmdk_create_opts = { |
3009 | .name = "vmdk-create-opts", | |
3010 | .head = QTAILQ_HEAD_INITIALIZER(vmdk_create_opts.head), | |
3011 | .desc = { | |
3012 | { | |
3013 | .name = BLOCK_OPT_SIZE, | |
3014 | .type = QEMU_OPT_SIZE, | |
3015 | .help = "Virtual disk size" | |
3016 | }, | |
3017 | { | |
3018 | .name = BLOCK_OPT_ADAPTER_TYPE, | |
3019 | .type = QEMU_OPT_STRING, | |
3020 | .help = "Virtual adapter type, can be one of " | |
3021 | "ide (default), lsilogic, buslogic or legacyESX" | |
3022 | }, | |
3023 | { | |
3024 | .name = BLOCK_OPT_BACKING_FILE, | |
3025 | .type = QEMU_OPT_STRING, | |
3026 | .help = "File name of a base image" | |
3027 | }, | |
d51a814c EB |
3028 | { |
3029 | .name = BLOCK_OPT_BACKING_FMT, | |
3030 | .type = QEMU_OPT_STRING, | |
3031 | .help = "Must be 'vmdk' if present", | |
3032 | }, | |
5820f1da CL |
3033 | { |
3034 | .name = BLOCK_OPT_COMPAT6, | |
3035 | .type = QEMU_OPT_BOOL, | |
3036 | .help = "VMDK version 6 image", | |
3037 | .def_value_str = "off" | |
3038 | }, | |
f249924e JK |
3039 | { |
3040 | .name = BLOCK_OPT_HWVERSION, | |
3041 | .type = QEMU_OPT_STRING, | |
3042 | .help = "VMDK hardware version", | |
3043 | .def_value_str = "undefined" | |
3044 | }, | |
f3d43dfd TW |
3045 | { |
3046 | .name = BLOCK_OPT_TOOLSVERSION, | |
3047 | .type = QEMU_OPT_STRING, | |
3048 | .help = "VMware guest tools version", | |
3049 | }, | |
5820f1da CL |
3050 | { |
3051 | .name = BLOCK_OPT_SUBFMT, | |
3052 | .type = QEMU_OPT_STRING, | |
3053 | .help = | |
3054 | "VMDK flat extent format, can be one of " | |
3055 | "{monolithicSparse (default) | monolithicFlat | twoGbMaxExtentSparse | twoGbMaxExtentFlat | streamOptimized} " | |
3056 | }, | |
3057 | { | |
3058 | .name = BLOCK_OPT_ZEROED_GRAIN, | |
3059 | .type = QEMU_OPT_BOOL, | |
3060 | .help = "Enable efficient zero writes " | |
3061 | "using the zeroed-grain GTE feature" | |
3062 | }, | |
3063 | { /* end of list */ } | |
3064 | } | |
0e7e1989 KW |
3065 | }; |
3066 | ||
5efa9d5a | 3067 | static BlockDriver bdrv_vmdk = { |
da7a50f9 FZ |
3068 | .format_name = "vmdk", |
3069 | .instance_size = sizeof(BDRVVmdkState), | |
3070 | .bdrv_probe = vmdk_probe, | |
3071 | .bdrv_open = vmdk_open, | |
2fd61638 | 3072 | .bdrv_co_check = vmdk_co_check, |
da7a50f9 | 3073 | .bdrv_reopen_prepare = vmdk_reopen_prepare, |
69dca43d | 3074 | .bdrv_child_perm = bdrv_default_perms, |
f10cc243 | 3075 | .bdrv_co_preadv = vmdk_co_preadv, |
37b1d7d8 | 3076 | .bdrv_co_pwritev = vmdk_co_pwritev, |
b2c622d3 | 3077 | .bdrv_co_pwritev_compressed = vmdk_co_pwritev_compressed, |
a620f2ae | 3078 | .bdrv_co_pwrite_zeroes = vmdk_co_pwrite_zeroes, |
da7a50f9 | 3079 | .bdrv_close = vmdk_close, |
efc75e2a | 3080 | .bdrv_co_create_opts = vmdk_co_create_opts, |
3015372d | 3081 | .bdrv_co_create = vmdk_co_create, |
c72080b9 | 3082 | .bdrv_co_block_status = vmdk_co_block_status, |
da7a50f9 FZ |
3083 | .bdrv_get_allocated_file_size = vmdk_get_allocated_file_size, |
3084 | .bdrv_has_zero_init = vmdk_has_zero_init, | |
f4c129a3 | 3085 | .bdrv_get_specific_info = vmdk_get_specific_info, |
d34682cd | 3086 | .bdrv_refresh_limits = vmdk_refresh_limits, |
74fe188c | 3087 | .bdrv_get_info = vmdk_get_info, |
abc521a9 | 3088 | .bdrv_gather_child_options = vmdk_gather_child_options, |
da7a50f9 | 3089 | |
d67066d8 | 3090 | .is_format = true, |
8ee79e70 | 3091 | .supports_backing = true, |
5820f1da | 3092 | .create_opts = &vmdk_create_opts, |
ea2384d3 | 3093 | }; |
5efa9d5a AL |
3094 | |
3095 | static void bdrv_vmdk_init(void) | |
3096 | { | |
3097 | bdrv_register(&bdrv_vmdk); | |
3098 | } | |
3099 | ||
3100 | block_init(bdrv_vmdk_init); |