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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" |
5df022cf | 36 | #include "qemu/memalign.h" |
795c40b8 | 37 | #include "migration/blocker.h" |
f348b6d1 | 38 | #include "qemu/cutils.h" |
2923d34f | 39 | #include <zlib.h> |
ea2384d3 | 40 | |
ea2384d3 FB |
41 | #define VMDK3_MAGIC (('C' << 24) | ('O' << 16) | ('W' << 8) | 'D') |
42 | #define VMDK4_MAGIC (('K' << 24) | ('D' << 16) | ('M' << 8) | 'V') | |
432bb170 | 43 | #define VMDK4_COMPRESSION_DEFLATE 1 |
95b0aa42 | 44 | #define VMDK4_FLAG_NL_DETECT (1 << 0) |
bb45ded9 | 45 | #define VMDK4_FLAG_RGD (1 << 1) |
14ead646 FZ |
46 | /* Zeroed-grain enable bit */ |
47 | #define VMDK4_FLAG_ZERO_GRAIN (1 << 2) | |
432bb170 FZ |
48 | #define VMDK4_FLAG_COMPRESS (1 << 16) |
49 | #define VMDK4_FLAG_MARKER (1 << 17) | |
65bd155c | 50 | #define VMDK4_GD_AT_END 0xffffffffffffffffULL |
ea2384d3 | 51 | |
a77672ea YCL |
52 | #define VMDK_EXTENT_MAX_SECTORS (1ULL << 32) |
53 | ||
14ead646 | 54 | #define VMDK_GTE_ZEROED 0x1 |
65f74725 FZ |
55 | |
56 | /* VMDK internal error codes */ | |
57 | #define VMDK_OK 0 | |
58 | #define VMDK_ERROR (-1) | |
59 | /* Cluster not allocated */ | |
60 | #define VMDK_UNALLOC (-2) | |
61 | #define VMDK_ZEROED (-3) | |
62 | ||
69e0b6df | 63 | #define BLOCK_OPT_ZEROED_GRAIN "zeroed_grain" |
f3d43dfd | 64 | #define BLOCK_OPT_TOOLSVERSION "toolsversion" |
69e0b6df | 65 | |
ea2384d3 FB |
66 | typedef struct { |
67 | uint32_t version; | |
68 | uint32_t flags; | |
69 | uint32_t disk_sectors; | |
70 | uint32_t granularity; | |
71 | uint32_t l1dir_offset; | |
72 | uint32_t l1dir_size; | |
73 | uint32_t file_sectors; | |
74 | uint32_t cylinders; | |
75 | uint32_t heads; | |
76 | uint32_t sectors_per_track; | |
5d8caa54 | 77 | } QEMU_PACKED VMDK3Header; |
ea2384d3 FB |
78 | |
79 | typedef struct { | |
80 | uint32_t version; | |
81 | uint32_t flags; | |
e98768d4 FZ |
82 | uint64_t capacity; |
83 | uint64_t granularity; | |
84 | uint64_t desc_offset; | |
85 | uint64_t desc_size; | |
ca8804ce FZ |
86 | /* Number of GrainTableEntries per GrainTable */ |
87 | uint32_t num_gtes_per_gt; | |
e98768d4 FZ |
88 | uint64_t rgd_offset; |
89 | uint64_t gd_offset; | |
90 | uint64_t grain_offset; | |
ea2384d3 FB |
91 | char filler[1]; |
92 | char check_bytes[4]; | |
432bb170 | 93 | uint16_t compressAlgorithm; |
541dc0d4 | 94 | } QEMU_PACKED VMDK4Header; |
ea2384d3 | 95 | |
98eb9733 SE |
96 | typedef struct VMDKSESparseConstHeader { |
97 | uint64_t magic; | |
98 | uint64_t version; | |
99 | uint64_t capacity; | |
100 | uint64_t grain_size; | |
101 | uint64_t grain_table_size; | |
102 | uint64_t flags; | |
103 | uint64_t reserved1; | |
104 | uint64_t reserved2; | |
105 | uint64_t reserved3; | |
106 | uint64_t reserved4; | |
107 | uint64_t volatile_header_offset; | |
108 | uint64_t volatile_header_size; | |
109 | uint64_t journal_header_offset; | |
110 | uint64_t journal_header_size; | |
111 | uint64_t journal_offset; | |
112 | uint64_t journal_size; | |
113 | uint64_t grain_dir_offset; | |
114 | uint64_t grain_dir_size; | |
115 | uint64_t grain_tables_offset; | |
116 | uint64_t grain_tables_size; | |
117 | uint64_t free_bitmap_offset; | |
118 | uint64_t free_bitmap_size; | |
119 | uint64_t backmap_offset; | |
120 | uint64_t backmap_size; | |
121 | uint64_t grains_offset; | |
122 | uint64_t grains_size; | |
123 | uint8_t pad[304]; | |
124 | } QEMU_PACKED VMDKSESparseConstHeader; | |
125 | ||
126 | typedef struct VMDKSESparseVolatileHeader { | |
127 | uint64_t magic; | |
128 | uint64_t free_gt_number; | |
129 | uint64_t next_txn_seq_number; | |
130 | uint64_t replay_journal; | |
131 | uint8_t pad[480]; | |
132 | } QEMU_PACKED VMDKSESparseVolatileHeader; | |
133 | ||
ea2384d3 FB |
134 | #define L2_CACHE_SIZE 16 |
135 | ||
b3976d3c | 136 | typedef struct VmdkExtent { |
24bc15d1 | 137 | BdrvChild *file; |
b3976d3c | 138 | bool flat; |
432bb170 FZ |
139 | bool compressed; |
140 | bool has_marker; | |
14ead646 | 141 | bool has_zero_grain; |
98eb9733 SE |
142 | bool sesparse; |
143 | uint64_t sesparse_l2_tables_offset; | |
144 | uint64_t sesparse_clusters_offset; | |
145 | int32_t entry_size; | |
14ead646 | 146 | int version; |
b3976d3c FZ |
147 | int64_t sectors; |
148 | int64_t end_sector; | |
7fa60fa3 | 149 | int64_t flat_start_offset; |
ea2384d3 | 150 | int64_t l1_table_offset; |
ff1afc72 | 151 | int64_t l1_backup_table_offset; |
98eb9733 | 152 | void *l1_table; |
ff1afc72 | 153 | uint32_t *l1_backup_table; |
ea2384d3 FB |
154 | unsigned int l1_size; |
155 | uint32_t l1_entry_sectors; | |
156 | ||
157 | unsigned int l2_size; | |
98eb9733 | 158 | void *l2_cache; |
ea2384d3 FB |
159 | uint32_t l2_cache_offsets[L2_CACHE_SIZE]; |
160 | uint32_t l2_cache_counts[L2_CACHE_SIZE]; | |
161 | ||
301c7d38 | 162 | int64_t cluster_sectors; |
c6ac36e1 | 163 | int64_t next_cluster_sector; |
f4c129a3 | 164 | char *type; |
b3976d3c FZ |
165 | } VmdkExtent; |
166 | ||
167 | typedef struct BDRVVmdkState { | |
848c66e8 | 168 | CoMutex lock; |
e98768d4 | 169 | uint64_t desc_offset; |
69b4d86d | 170 | bool cid_updated; |
c338b6ad | 171 | bool cid_checked; |
f4c129a3 | 172 | uint32_t cid; |
5f4da8c0 | 173 | uint32_t parent_cid; |
b3976d3c FZ |
174 | int num_extents; |
175 | /* Extent array with num_extents entries, ascend ordered by address */ | |
176 | VmdkExtent *extents; | |
2bc3166c | 177 | Error *migration_blocker; |
f4c129a3 | 178 | char *create_type; |
ea2384d3 FB |
179 | } BDRVVmdkState; |
180 | ||
6d17e287 HR |
181 | typedef struct BDRVVmdkReopenState { |
182 | bool *extents_using_bs_file; | |
183 | } BDRVVmdkReopenState; | |
184 | ||
630530a6 | 185 | typedef struct VmdkMetaData { |
630530a6 TS |
186 | unsigned int l1_index; |
187 | unsigned int l2_index; | |
188 | unsigned int l2_offset; | |
4dc20e64 | 189 | bool new_allocation; |
cdeaf1f1 | 190 | uint32_t *l2_cache_entry; |
630530a6 TS |
191 | } VmdkMetaData; |
192 | ||
432bb170 FZ |
193 | typedef struct VmdkGrainMarker { |
194 | uint64_t lba; | |
195 | uint32_t size; | |
880a7817 | 196 | uint8_t data[]; |
5d8caa54 | 197 | } QEMU_PACKED VmdkGrainMarker; |
432bb170 | 198 | |
65bd155c KW |
199 | enum { |
200 | MARKER_END_OF_STREAM = 0, | |
201 | MARKER_GRAIN_TABLE = 1, | |
202 | MARKER_GRAIN_DIRECTORY = 2, | |
203 | MARKER_FOOTER = 3, | |
204 | }; | |
205 | ||
ea2384d3 FB |
206 | static int vmdk_probe(const uint8_t *buf, int buf_size, const char *filename) |
207 | { | |
208 | uint32_t magic; | |
209 | ||
ae261c86 | 210 | if (buf_size < 4) { |
ea2384d3 | 211 | return 0; |
ae261c86 | 212 | } |
ea2384d3 FB |
213 | magic = be32_to_cpu(*(uint32_t *)buf); |
214 | if (magic == VMDK3_MAGIC || | |
01fc99d6 | 215 | magic == VMDK4_MAGIC) { |
ea2384d3 | 216 | return 100; |
01fc99d6 FZ |
217 | } else { |
218 | const char *p = (const char *)buf; | |
219 | const char *end = p + buf_size; | |
220 | while (p < end) { | |
221 | if (*p == '#') { | |
222 | /* skip comment line */ | |
223 | while (p < end && *p != '\n') { | |
224 | p++; | |
225 | } | |
226 | p++; | |
227 | continue; | |
228 | } | |
229 | if (*p == ' ') { | |
230 | while (p < end && *p == ' ') { | |
231 | p++; | |
232 | } | |
233 | /* skip '\r' if windows line endings used. */ | |
234 | if (p < end && *p == '\r') { | |
235 | p++; | |
236 | } | |
237 | /* only accept blank lines before 'version=' line */ | |
238 | if (p == end || *p != '\n') { | |
239 | return 0; | |
240 | } | |
241 | p++; | |
242 | continue; | |
243 | } | |
244 | if (end - p >= strlen("version=X\n")) { | |
245 | if (strncmp("version=1\n", p, strlen("version=1\n")) == 0 || | |
b69864e5 SE |
246 | strncmp("version=2\n", p, strlen("version=2\n")) == 0 || |
247 | strncmp("version=3\n", p, strlen("version=3\n")) == 0) { | |
01fc99d6 FZ |
248 | return 100; |
249 | } | |
250 | } | |
251 | if (end - p >= strlen("version=X\r\n")) { | |
252 | if (strncmp("version=1\r\n", p, strlen("version=1\r\n")) == 0 || | |
b69864e5 SE |
253 | strncmp("version=2\r\n", p, strlen("version=2\r\n")) == 0 || |
254 | strncmp("version=3\r\n", p, strlen("version=3\r\n")) == 0) { | |
01fc99d6 FZ |
255 | return 100; |
256 | } | |
257 | } | |
258 | return 0; | |
259 | } | |
ea2384d3 | 260 | return 0; |
01fc99d6 | 261 | } |
ea2384d3 FB |
262 | } |
263 | ||
3b46e624 | 264 | #define SECTOR_SIZE 512 |
f66fd6c3 FZ |
265 | #define DESC_SIZE (20 * SECTOR_SIZE) /* 20 sectors of 512 bytes each */ |
266 | #define BUF_SIZE 4096 | |
267 | #define HEADER_SIZE 512 /* first sector of 512 bytes */ | |
5f4da8c0 | 268 | |
b3976d3c FZ |
269 | static void vmdk_free_extents(BlockDriverState *bs) |
270 | { | |
271 | int i; | |
272 | BDRVVmdkState *s = bs->opaque; | |
b3c0bfb6 | 273 | VmdkExtent *e; |
b3976d3c FZ |
274 | |
275 | for (i = 0; i < s->num_extents; i++) { | |
b3c0bfb6 FZ |
276 | e = &s->extents[i]; |
277 | g_free(e->l1_table); | |
278 | g_free(e->l2_cache); | |
279 | g_free(e->l1_backup_table); | |
f4c129a3 | 280 | g_free(e->type); |
9a4f4c31 | 281 | if (e->file != bs->file) { |
24bc15d1 | 282 | bdrv_unref_child(bs, e->file); |
b3c0bfb6 | 283 | } |
b3976d3c | 284 | } |
7267c094 | 285 | g_free(s->extents); |
b3976d3c FZ |
286 | } |
287 | ||
86c6b429 FZ |
288 | static void vmdk_free_last_extent(BlockDriverState *bs) |
289 | { | |
290 | BDRVVmdkState *s = bs->opaque; | |
291 | ||
292 | if (s->num_extents == 0) { | |
293 | return; | |
294 | } | |
295 | s->num_extents--; | |
5839e53b | 296 | s->extents = g_renew(VmdkExtent, s->extents, s->num_extents); |
86c6b429 FZ |
297 | } |
298 | ||
9877860e PM |
299 | /* Return -ve errno, or 0 on success and write CID into *pcid. */ |
300 | static int vmdk_read_cid(BlockDriverState *bs, int parent, uint32_t *pcid) | |
ea2384d3 | 301 | { |
5997c210 | 302 | char *desc; |
9877860e | 303 | uint32_t cid; |
7ccfb2eb | 304 | const char *p_name, *cid_str; |
5f4da8c0 | 305 | size_t cid_str_size; |
e1da9b24 | 306 | BDRVVmdkState *s = bs->opaque; |
99f1835d | 307 | int ret; |
5f4da8c0 | 308 | |
5997c210 | 309 | desc = g_malloc0(DESC_SIZE); |
32cc71de | 310 | ret = bdrv_pread(bs->file, s->desc_offset, DESC_SIZE, desc, 0); |
99f1835d | 311 | if (ret < 0) { |
9877860e | 312 | goto out; |
e1da9b24 | 313 | } |
5f4da8c0 TS |
314 | |
315 | if (parent) { | |
316 | cid_str = "parentCID"; | |
317 | cid_str_size = sizeof("parentCID"); | |
318 | } else { | |
319 | cid_str = "CID"; | |
320 | cid_str_size = sizeof("CID"); | |
321 | } | |
322 | ||
93897b9f | 323 | desc[DESC_SIZE - 1] = '\0'; |
ae261c86 | 324 | p_name = strstr(desc, cid_str); |
9877860e PM |
325 | if (p_name == NULL) { |
326 | ret = -EINVAL; | |
327 | goto out; | |
5f4da8c0 | 328 | } |
9877860e PM |
329 | p_name += cid_str_size; |
330 | if (sscanf(p_name, "%" SCNx32, &cid) != 1) { | |
331 | ret = -EINVAL; | |
332 | goto out; | |
333 | } | |
334 | *pcid = cid; | |
335 | ret = 0; | |
5f4da8c0 | 336 | |
9877860e | 337 | out: |
5997c210 | 338 | g_free(desc); |
9877860e | 339 | return ret; |
5f4da8c0 TS |
340 | } |
341 | ||
342 | static int vmdk_write_cid(BlockDriverState *bs, uint32_t cid) | |
343 | { | |
965415eb | 344 | char *desc, *tmp_desc; |
5f4da8c0 | 345 | char *p_name, *tmp_str; |
e1da9b24 | 346 | BDRVVmdkState *s = bs->opaque; |
965415eb | 347 | int ret = 0; |
5f4da8c0 | 348 | |
965415eb FZ |
349 | desc = g_malloc0(DESC_SIZE); |
350 | tmp_desc = g_malloc0(DESC_SIZE); | |
32cc71de | 351 | ret = bdrv_pread(bs->file, s->desc_offset, DESC_SIZE, desc, 0); |
99f1835d | 352 | if (ret < 0) { |
965415eb | 353 | goto out; |
e1da9b24 | 354 | } |
5f4da8c0 | 355 | |
93897b9f | 356 | desc[DESC_SIZE - 1] = '\0'; |
ae261c86 | 357 | tmp_str = strstr(desc, "parentCID"); |
93897b9f | 358 | if (tmp_str == NULL) { |
965415eb FZ |
359 | ret = -EINVAL; |
360 | goto out; | |
93897b9f KW |
361 | } |
362 | ||
965415eb | 363 | pstrcpy(tmp_desc, DESC_SIZE, tmp_str); |
ae261c86 FZ |
364 | p_name = strstr(desc, "CID"); |
365 | if (p_name != NULL) { | |
5f4da8c0 | 366 | p_name += sizeof("CID"); |
965415eb FZ |
367 | snprintf(p_name, DESC_SIZE - (p_name - desc), "%" PRIx32 "\n", cid); |
368 | pstrcat(desc, DESC_SIZE, tmp_desc); | |
5f4da8c0 TS |
369 | } |
370 | ||
32cc71de | 371 | ret = bdrv_pwrite_sync(bs->file, s->desc_offset, DESC_SIZE, desc, 0); |
99f1835d | 372 | |
965415eb FZ |
373 | out: |
374 | g_free(desc); | |
375 | g_free(tmp_desc); | |
376 | return ret; | |
5f4da8c0 TS |
377 | } |
378 | ||
379 | static int vmdk_is_cid_valid(BlockDriverState *bs) | |
380 | { | |
5f4da8c0 | 381 | BDRVVmdkState *s = bs->opaque; |
5f4da8c0 TS |
382 | uint32_t cur_pcid; |
383 | ||
760e0063 KW |
384 | if (!s->cid_checked && bs->backing) { |
385 | BlockDriverState *p_bs = bs->backing->bs; | |
386 | ||
439e89fc HR |
387 | if (strcmp(p_bs->drv->format_name, "vmdk")) { |
388 | /* Backing file is not in vmdk format, so it does not have | |
389 | * a CID, which makes the overlay's parent CID invalid */ | |
390 | return 0; | |
391 | } | |
392 | ||
9877860e PM |
393 | if (vmdk_read_cid(p_bs, 0, &cur_pcid) != 0) { |
394 | /* read failure: report as not valid */ | |
395 | return 0; | |
396 | } | |
ae261c86 FZ |
397 | if (s->parent_cid != cur_pcid) { |
398 | /* CID not valid */ | |
5f4da8c0 | 399 | return 0; |
ae261c86 | 400 | } |
5f4da8c0 | 401 | } |
c338b6ad | 402 | s->cid_checked = true; |
ae261c86 | 403 | /* CID valid */ |
5f4da8c0 TS |
404 | return 1; |
405 | } | |
406 | ||
3897575f JC |
407 | static int vmdk_reopen_prepare(BDRVReopenState *state, |
408 | BlockReopenQueue *queue, Error **errp) | |
409 | { | |
6d17e287 HR |
410 | BDRVVmdkState *s; |
411 | BDRVVmdkReopenState *rs; | |
412 | int i; | |
413 | ||
3897575f JC |
414 | assert(state != NULL); |
415 | assert(state->bs != NULL); | |
6d17e287 HR |
416 | assert(state->opaque == NULL); |
417 | ||
418 | s = state->bs->opaque; | |
419 | ||
420 | rs = g_new0(BDRVVmdkReopenState, 1); | |
421 | state->opaque = rs; | |
422 | ||
423 | /* | |
424 | * Check whether there are any extents stored in bs->file; if bs->file | |
425 | * changes, we will need to update their .file pointers to follow suit | |
426 | */ | |
427 | rs->extents_using_bs_file = g_new(bool, s->num_extents); | |
428 | for (i = 0; i < s->num_extents; i++) { | |
429 | rs->extents_using_bs_file[i] = s->extents[i].file == state->bs->file; | |
430 | } | |
431 | ||
67251a31 | 432 | return 0; |
3897575f JC |
433 | } |
434 | ||
6d17e287 HR |
435 | static void vmdk_reopen_clean(BDRVReopenState *state) |
436 | { | |
437 | BDRVVmdkReopenState *rs = state->opaque; | |
438 | ||
439 | g_free(rs->extents_using_bs_file); | |
440 | g_free(rs); | |
441 | state->opaque = NULL; | |
442 | } | |
443 | ||
444 | static void vmdk_reopen_commit(BDRVReopenState *state) | |
445 | { | |
446 | BDRVVmdkState *s = state->bs->opaque; | |
447 | BDRVVmdkReopenState *rs = state->opaque; | |
448 | int i; | |
449 | ||
450 | for (i = 0; i < s->num_extents; i++) { | |
451 | if (rs->extents_using_bs_file[i]) { | |
452 | s->extents[i].file = state->bs->file; | |
453 | } | |
454 | } | |
455 | ||
456 | vmdk_reopen_clean(state); | |
457 | } | |
458 | ||
459 | static void vmdk_reopen_abort(BDRVReopenState *state) | |
460 | { | |
461 | vmdk_reopen_clean(state); | |
462 | } | |
463 | ||
9949f97e | 464 | static int vmdk_parent_open(BlockDriverState *bs) |
5f4da8c0 | 465 | { |
5fafdf24 | 466 | char *p_name; |
71968dbf | 467 | char *desc; |
e1da9b24 | 468 | BDRVVmdkState *s = bs->opaque; |
588b65a3 | 469 | int ret; |
5f4da8c0 | 470 | |
71968dbf | 471 | desc = g_malloc0(DESC_SIZE + 1); |
32cc71de | 472 | ret = bdrv_pread(bs->file, s->desc_offset, DESC_SIZE, desc, 0); |
588b65a3 | 473 | if (ret < 0) { |
71968dbf | 474 | goto out; |
e1da9b24 | 475 | } |
5f4da8c0 | 476 | |
ae261c86 FZ |
477 | p_name = strstr(desc, "parentFileNameHint"); |
478 | if (p_name != NULL) { | |
5f4da8c0 | 479 | char *end_name; |
5f4da8c0 TS |
480 | |
481 | p_name += sizeof("parentFileNameHint") + 1; | |
ae261c86 FZ |
482 | end_name = strchr(p_name, '\"'); |
483 | if (end_name == NULL) { | |
71968dbf FZ |
484 | ret = -EINVAL; |
485 | goto out; | |
ae261c86 | 486 | } |
998c2019 | 487 | if ((end_name - p_name) > sizeof(bs->auto_backing_file) - 1) { |
71968dbf FZ |
488 | ret = -EINVAL; |
489 | goto out; | |
ae261c86 | 490 | } |
3b46e624 | 491 | |
998c2019 HR |
492 | pstrcpy(bs->auto_backing_file, end_name - p_name + 1, p_name); |
493 | pstrcpy(bs->backing_file, sizeof(bs->backing_file), | |
494 | bs->auto_backing_file); | |
7502be83 SE |
495 | pstrcpy(bs->backing_format, sizeof(bs->backing_format), |
496 | "vmdk"); | |
ff1afc72 | 497 | } |
5f4da8c0 | 498 | |
71968dbf FZ |
499 | out: |
500 | g_free(desc); | |
501 | return ret; | |
5f4da8c0 TS |
502 | } |
503 | ||
b3976d3c FZ |
504 | /* Create and append extent to the extent array. Return the added VmdkExtent |
505 | * address. return NULL if allocation failed. */ | |
8aa1331c | 506 | static int vmdk_add_extent(BlockDriverState *bs, |
24bc15d1 | 507 | BdrvChild *file, bool flat, int64_t sectors, |
b3976d3c FZ |
508 | int64_t l1_offset, int64_t l1_backup_offset, |
509 | uint32_t l1_size, | |
8aa1331c | 510 | int l2_size, uint64_t cluster_sectors, |
4823970b FZ |
511 | VmdkExtent **new_extent, |
512 | Error **errp) | |
b3976d3c FZ |
513 | { |
514 | VmdkExtent *extent; | |
515 | BDRVVmdkState *s = bs->opaque; | |
0a156f7c | 516 | int64_t nb_sectors; |
b3976d3c | 517 | |
8aa1331c FZ |
518 | if (cluster_sectors > 0x200000) { |
519 | /* 0x200000 * 512Bytes = 1GB for one cluster is unrealistic */ | |
4823970b FZ |
520 | error_setg(errp, "Invalid granularity, image may be corrupt"); |
521 | return -EFBIG; | |
8aa1331c | 522 | } |
59d6ee48 | 523 | if (l1_size > 32 * 1024 * 1024) { |
940a2cd5 SE |
524 | /* |
525 | * Although with big capacity and small l1_entry_sectors, we can get a | |
b0651b8c | 526 | * big l1_size, we don't want unbounded value to allocate the table. |
59d6ee48 SE |
527 | * Limit it to 32M, which is enough to store: |
528 | * 8TB - for both VMDK3 & VMDK4 with | |
529 | * minimal cluster size: 512B | |
530 | * minimal L2 table size: 512 entries | |
531 | * 8 TB is still more than the maximal value supported for | |
532 | * VMDK3 & VMDK4 which is 2TB. | |
98eb9733 SE |
533 | * 64TB - for "ESXi seSparse Extent" |
534 | * minimal cluster size: 512B (default is 4KB) | |
535 | * L2 table size: 4096 entries (const). | |
536 | * 64TB is more than the maximal value supported for | |
537 | * seSparse VMDKs (which is slightly less than 64TB) | |
940a2cd5 | 538 | */ |
4823970b | 539 | error_setg(errp, "L1 size too big"); |
b0651b8c FZ |
540 | return -EFBIG; |
541 | } | |
8aa1331c | 542 | |
24bc15d1 | 543 | nb_sectors = bdrv_nb_sectors(file->bs); |
0a156f7c MA |
544 | if (nb_sectors < 0) { |
545 | return nb_sectors; | |
c6ac36e1 FZ |
546 | } |
547 | ||
5839e53b | 548 | s->extents = g_renew(VmdkExtent, s->extents, s->num_extents + 1); |
b3976d3c FZ |
549 | extent = &s->extents[s->num_extents]; |
550 | s->num_extents++; | |
551 | ||
552 | memset(extent, 0, sizeof(VmdkExtent)); | |
553 | extent->file = file; | |
554 | extent->flat = flat; | |
555 | extent->sectors = sectors; | |
556 | extent->l1_table_offset = l1_offset; | |
557 | extent->l1_backup_table_offset = l1_backup_offset; | |
558 | extent->l1_size = l1_size; | |
559 | extent->l1_entry_sectors = l2_size * cluster_sectors; | |
560 | extent->l2_size = l2_size; | |
301c7d38 | 561 | extent->cluster_sectors = flat ? sectors : cluster_sectors; |
0a156f7c | 562 | extent->next_cluster_sector = ROUND_UP(nb_sectors, cluster_sectors); |
98eb9733 | 563 | extent->entry_size = sizeof(uint32_t); |
b3976d3c FZ |
564 | |
565 | if (s->num_extents > 1) { | |
566 | extent->end_sector = (*(extent - 1)).end_sector + extent->sectors; | |
567 | } else { | |
568 | extent->end_sector = extent->sectors; | |
569 | } | |
570 | bs->total_sectors = extent->end_sector; | |
8aa1331c FZ |
571 | if (new_extent) { |
572 | *new_extent = extent; | |
573 | } | |
574 | return 0; | |
b3976d3c FZ |
575 | } |
576 | ||
4823970b FZ |
577 | static int vmdk_init_tables(BlockDriverState *bs, VmdkExtent *extent, |
578 | Error **errp) | |
5f4da8c0 | 579 | { |
b4b3ab14 | 580 | int ret; |
13c4941c FZ |
581 | size_t l1_size; |
582 | int i; | |
5f4da8c0 | 583 | |
ea2384d3 | 584 | /* read the L1 table */ |
98eb9733 | 585 | l1_size = extent->l1_size * extent->entry_size; |
d6e59931 KW |
586 | extent->l1_table = g_try_malloc(l1_size); |
587 | if (l1_size && extent->l1_table == NULL) { | |
588 | return -ENOMEM; | |
589 | } | |
590 | ||
32cc71de AF |
591 | ret = bdrv_pread(extent->file, extent->l1_table_offset, l1_size, |
592 | extent->l1_table, 0); | |
b4b3ab14 | 593 | if (ret < 0) { |
f30c66ba | 594 | bdrv_refresh_filename(extent->file->bs); |
4823970b FZ |
595 | error_setg_errno(errp, -ret, |
596 | "Could not read l1 table from extent '%s'", | |
24bc15d1 | 597 | extent->file->bs->filename); |
b4b3ab14 | 598 | goto fail_l1; |
b3976d3c FZ |
599 | } |
600 | for (i = 0; i < extent->l1_size; i++) { | |
98eb9733 SE |
601 | if (extent->entry_size == sizeof(uint64_t)) { |
602 | le64_to_cpus((uint64_t *)extent->l1_table + i); | |
603 | } else { | |
604 | assert(extent->entry_size == sizeof(uint32_t)); | |
605 | le32_to_cpus((uint32_t *)extent->l1_table + i); | |
606 | } | |
ea2384d3 FB |
607 | } |
608 | ||
b3976d3c | 609 | if (extent->l1_backup_table_offset) { |
98eb9733 | 610 | assert(!extent->sesparse); |
d6e59931 KW |
611 | extent->l1_backup_table = g_try_malloc(l1_size); |
612 | if (l1_size && extent->l1_backup_table == NULL) { | |
613 | ret = -ENOMEM; | |
614 | goto fail_l1; | |
615 | } | |
53fb7844 | 616 | ret = bdrv_pread(extent->file, extent->l1_backup_table_offset, |
32cc71de | 617 | l1_size, extent->l1_backup_table, 0); |
b4b3ab14 | 618 | if (ret < 0) { |
f30c66ba | 619 | bdrv_refresh_filename(extent->file->bs); |
4823970b FZ |
620 | error_setg_errno(errp, -ret, |
621 | "Could not read l1 backup table from extent '%s'", | |
24bc15d1 | 622 | extent->file->bs->filename); |
b4b3ab14 | 623 | goto fail_l1b; |
b3976d3c FZ |
624 | } |
625 | for (i = 0; i < extent->l1_size; i++) { | |
626 | le32_to_cpus(&extent->l1_backup_table[i]); | |
ff1afc72 FB |
627 | } |
628 | } | |
629 | ||
b3976d3c | 630 | extent->l2_cache = |
98eb9733 | 631 | g_malloc(extent->entry_size * extent->l2_size * L2_CACHE_SIZE); |
ea2384d3 | 632 | return 0; |
b4b3ab14 | 633 | fail_l1b: |
7267c094 | 634 | g_free(extent->l1_backup_table); |
b4b3ab14 | 635 | fail_l1: |
7267c094 | 636 | g_free(extent->l1_table); |
b4b3ab14 FZ |
637 | return ret; |
638 | } | |
639 | ||
daac8fdc | 640 | static int vmdk_open_vmfs_sparse(BlockDriverState *bs, |
24bc15d1 | 641 | BdrvChild *file, |
4823970b | 642 | int flags, Error **errp) |
b4b3ab14 FZ |
643 | { |
644 | int ret; | |
645 | uint32_t magic; | |
646 | VMDK3Header header; | |
cd466702 | 647 | VmdkExtent *extent = NULL; |
b4b3ab14 | 648 | |
32cc71de | 649 | ret = bdrv_pread(file, sizeof(magic), sizeof(header), &header, 0); |
b4b3ab14 | 650 | if (ret < 0) { |
f30c66ba | 651 | bdrv_refresh_filename(file->bs); |
4823970b FZ |
652 | error_setg_errno(errp, -ret, |
653 | "Could not read header from file '%s'", | |
24bc15d1 | 654 | file->bs->filename); |
86c6b429 | 655 | return ret; |
b4b3ab14 | 656 | } |
f6b61e54 FZ |
657 | ret = vmdk_add_extent(bs, file, false, |
658 | le32_to_cpu(header.disk_sectors), | |
7237aecd | 659 | (int64_t)le32_to_cpu(header.l1dir_offset) << 9, |
f6b61e54 FZ |
660 | 0, |
661 | le32_to_cpu(header.l1dir_size), | |
662 | 4096, | |
663 | le32_to_cpu(header.granularity), | |
4823970b FZ |
664 | &extent, |
665 | errp); | |
8aa1331c FZ |
666 | if (ret < 0) { |
667 | return ret; | |
668 | } | |
4823970b | 669 | ret = vmdk_init_tables(bs, extent, errp); |
b4b3ab14 | 670 | if (ret) { |
86c6b429 FZ |
671 | /* free extent allocated by vmdk_add_extent */ |
672 | vmdk_free_last_extent(bs); | |
b4b3ab14 | 673 | } |
b4b3ab14 FZ |
674 | return ret; |
675 | } | |
676 | ||
98eb9733 SE |
677 | #define SESPARSE_CONST_HEADER_MAGIC UINT64_C(0x00000000cafebabe) |
678 | #define SESPARSE_VOLATILE_HEADER_MAGIC UINT64_C(0x00000000cafecafe) | |
679 | ||
680 | /* Strict checks - format not officially documented */ | |
681 | static int check_se_sparse_const_header(VMDKSESparseConstHeader *header, | |
682 | Error **errp) | |
683 | { | |
684 | header->magic = le64_to_cpu(header->magic); | |
685 | header->version = le64_to_cpu(header->version); | |
686 | header->grain_size = le64_to_cpu(header->grain_size); | |
687 | header->grain_table_size = le64_to_cpu(header->grain_table_size); | |
688 | header->flags = le64_to_cpu(header->flags); | |
689 | header->reserved1 = le64_to_cpu(header->reserved1); | |
690 | header->reserved2 = le64_to_cpu(header->reserved2); | |
691 | header->reserved3 = le64_to_cpu(header->reserved3); | |
692 | header->reserved4 = le64_to_cpu(header->reserved4); | |
693 | ||
694 | header->volatile_header_offset = | |
695 | le64_to_cpu(header->volatile_header_offset); | |
696 | header->volatile_header_size = le64_to_cpu(header->volatile_header_size); | |
697 | ||
698 | header->journal_header_offset = le64_to_cpu(header->journal_header_offset); | |
699 | header->journal_header_size = le64_to_cpu(header->journal_header_size); | |
700 | ||
701 | header->journal_offset = le64_to_cpu(header->journal_offset); | |
702 | header->journal_size = le64_to_cpu(header->journal_size); | |
703 | ||
704 | header->grain_dir_offset = le64_to_cpu(header->grain_dir_offset); | |
705 | header->grain_dir_size = le64_to_cpu(header->grain_dir_size); | |
706 | ||
707 | header->grain_tables_offset = le64_to_cpu(header->grain_tables_offset); | |
708 | header->grain_tables_size = le64_to_cpu(header->grain_tables_size); | |
709 | ||
710 | header->free_bitmap_offset = le64_to_cpu(header->free_bitmap_offset); | |
711 | header->free_bitmap_size = le64_to_cpu(header->free_bitmap_size); | |
712 | ||
713 | header->backmap_offset = le64_to_cpu(header->backmap_offset); | |
714 | header->backmap_size = le64_to_cpu(header->backmap_size); | |
715 | ||
716 | header->grains_offset = le64_to_cpu(header->grains_offset); | |
717 | header->grains_size = le64_to_cpu(header->grains_size); | |
718 | ||
719 | if (header->magic != SESPARSE_CONST_HEADER_MAGIC) { | |
720 | error_setg(errp, "Bad const header magic: 0x%016" PRIx64, | |
721 | header->magic); | |
722 | return -EINVAL; | |
723 | } | |
724 | ||
725 | if (header->version != 0x0000000200000001) { | |
726 | error_setg(errp, "Unsupported version: 0x%016" PRIx64, | |
727 | header->version); | |
728 | return -ENOTSUP; | |
729 | } | |
730 | ||
731 | if (header->grain_size != 8) { | |
732 | error_setg(errp, "Unsupported grain size: %" PRIu64, | |
733 | header->grain_size); | |
734 | return -ENOTSUP; | |
735 | } | |
736 | ||
737 | if (header->grain_table_size != 64) { | |
738 | error_setg(errp, "Unsupported grain table size: %" PRIu64, | |
739 | header->grain_table_size); | |
740 | return -ENOTSUP; | |
741 | } | |
742 | ||
743 | if (header->flags != 0) { | |
744 | error_setg(errp, "Unsupported flags: 0x%016" PRIx64, | |
745 | header->flags); | |
746 | return -ENOTSUP; | |
747 | } | |
748 | ||
749 | if (header->reserved1 != 0 || header->reserved2 != 0 || | |
750 | header->reserved3 != 0 || header->reserved4 != 0) { | |
751 | error_setg(errp, "Unsupported reserved bits:" | |
752 | " 0x%016" PRIx64 " 0x%016" PRIx64 | |
753 | " 0x%016" PRIx64 " 0x%016" PRIx64, | |
754 | header->reserved1, header->reserved2, | |
755 | header->reserved3, header->reserved4); | |
756 | return -ENOTSUP; | |
757 | } | |
758 | ||
759 | /* check that padding is 0 */ | |
760 | if (!buffer_is_zero(header->pad, sizeof(header->pad))) { | |
761 | error_setg(errp, "Unsupported non-zero const header padding"); | |
762 | return -ENOTSUP; | |
763 | } | |
764 | ||
765 | return 0; | |
766 | } | |
767 | ||
768 | static int check_se_sparse_volatile_header(VMDKSESparseVolatileHeader *header, | |
769 | Error **errp) | |
770 | { | |
771 | header->magic = le64_to_cpu(header->magic); | |
772 | header->free_gt_number = le64_to_cpu(header->free_gt_number); | |
773 | header->next_txn_seq_number = le64_to_cpu(header->next_txn_seq_number); | |
774 | header->replay_journal = le64_to_cpu(header->replay_journal); | |
775 | ||
776 | if (header->magic != SESPARSE_VOLATILE_HEADER_MAGIC) { | |
777 | error_setg(errp, "Bad volatile header magic: 0x%016" PRIx64, | |
778 | header->magic); | |
779 | return -EINVAL; | |
780 | } | |
781 | ||
782 | if (header->replay_journal) { | |
783 | error_setg(errp, "Image is dirty, Replaying journal not supported"); | |
784 | return -ENOTSUP; | |
785 | } | |
786 | ||
787 | /* check that padding is 0 */ | |
788 | if (!buffer_is_zero(header->pad, sizeof(header->pad))) { | |
789 | error_setg(errp, "Unsupported non-zero volatile header padding"); | |
790 | return -ENOTSUP; | |
791 | } | |
792 | ||
793 | return 0; | |
794 | } | |
795 | ||
796 | static int vmdk_open_se_sparse(BlockDriverState *bs, | |
797 | BdrvChild *file, | |
798 | int flags, Error **errp) | |
799 | { | |
800 | int ret; | |
801 | VMDKSESparseConstHeader const_header; | |
802 | VMDKSESparseVolatileHeader volatile_header; | |
cd466702 | 803 | VmdkExtent *extent = NULL; |
98eb9733 SE |
804 | |
805 | ret = bdrv_apply_auto_read_only(bs, | |
806 | "No write support for seSparse images available", errp); | |
807 | if (ret < 0) { | |
808 | return ret; | |
809 | } | |
810 | ||
811 | assert(sizeof(const_header) == SECTOR_SIZE); | |
812 | ||
32cc71de | 813 | ret = bdrv_pread(file, 0, sizeof(const_header), &const_header, 0); |
98eb9733 SE |
814 | if (ret < 0) { |
815 | bdrv_refresh_filename(file->bs); | |
816 | error_setg_errno(errp, -ret, | |
817 | "Could not read const header from file '%s'", | |
818 | file->bs->filename); | |
819 | return ret; | |
820 | } | |
821 | ||
822 | /* check const header */ | |
823 | ret = check_se_sparse_const_header(&const_header, errp); | |
824 | if (ret < 0) { | |
825 | return ret; | |
826 | } | |
827 | ||
828 | assert(sizeof(volatile_header) == SECTOR_SIZE); | |
829 | ||
53fb7844 | 830 | ret = bdrv_pread(file, const_header.volatile_header_offset * SECTOR_SIZE, |
32cc71de | 831 | sizeof(volatile_header), &volatile_header, 0); |
98eb9733 SE |
832 | if (ret < 0) { |
833 | bdrv_refresh_filename(file->bs); | |
834 | error_setg_errno(errp, -ret, | |
835 | "Could not read volatile header from file '%s'", | |
836 | file->bs->filename); | |
837 | return ret; | |
838 | } | |
839 | ||
840 | /* check volatile header */ | |
841 | ret = check_se_sparse_volatile_header(&volatile_header, errp); | |
842 | if (ret < 0) { | |
843 | return ret; | |
844 | } | |
845 | ||
846 | ret = vmdk_add_extent(bs, file, false, | |
847 | const_header.capacity, | |
848 | const_header.grain_dir_offset * SECTOR_SIZE, | |
849 | 0, | |
850 | const_header.grain_dir_size * | |
851 | SECTOR_SIZE / sizeof(uint64_t), | |
852 | const_header.grain_table_size * | |
853 | SECTOR_SIZE / sizeof(uint64_t), | |
854 | const_header.grain_size, | |
855 | &extent, | |
856 | errp); | |
857 | if (ret < 0) { | |
858 | return ret; | |
859 | } | |
860 | ||
861 | extent->sesparse = true; | |
862 | extent->sesparse_l2_tables_offset = const_header.grain_tables_offset; | |
863 | extent->sesparse_clusters_offset = const_header.grains_offset; | |
864 | extent->entry_size = sizeof(uint64_t); | |
865 | ||
866 | ret = vmdk_init_tables(bs, extent, errp); | |
867 | if (ret) { | |
868 | /* free extent allocated by vmdk_add_extent */ | |
869 | vmdk_free_last_extent(bs); | |
870 | } | |
871 | ||
872 | return ret; | |
873 | } | |
874 | ||
d1833ef5 | 875 | static int vmdk_open_desc_file(BlockDriverState *bs, int flags, char *buf, |
a6468367 | 876 | QDict *options, Error **errp); |
f16f509d | 877 | |
cf2ab8fc | 878 | static char *vmdk_read_desc(BdrvChild *file, uint64_t desc_offset, Error **errp) |
a8842e6d PB |
879 | { |
880 | int64_t size; | |
881 | char *buf; | |
882 | int ret; | |
883 | ||
cf2ab8fc | 884 | size = bdrv_getlength(file->bs); |
a8842e6d PB |
885 | if (size < 0) { |
886 | error_setg_errno(errp, -size, "Could not access file"); | |
887 | return NULL; | |
888 | } | |
889 | ||
03c3359d FZ |
890 | if (size < 4) { |
891 | /* Both descriptor file and sparse image must be much larger than 4 | |
892 | * bytes, also callers of vmdk_read_desc want to compare the first 4 | |
893 | * bytes with VMDK4_MAGIC, let's error out if less is read. */ | |
894 | error_setg(errp, "File is too small, not a valid image"); | |
895 | return NULL; | |
896 | } | |
897 | ||
73b7bcad FZ |
898 | size = MIN(size, (1 << 20) - 1); /* avoid unbounded allocation */ |
899 | buf = g_malloc(size + 1); | |
a8842e6d | 900 | |
32cc71de | 901 | ret = bdrv_pread(file, desc_offset, size, buf, 0); |
a8842e6d PB |
902 | if (ret < 0) { |
903 | error_setg_errno(errp, -ret, "Could not read from file"); | |
904 | g_free(buf); | |
905 | return NULL; | |
906 | } | |
353a5d84 | 907 | buf[size] = 0; |
a8842e6d PB |
908 | |
909 | return buf; | |
910 | } | |
911 | ||
86c6b429 | 912 | static int vmdk_open_vmdk4(BlockDriverState *bs, |
24bc15d1 | 913 | BdrvChild *file, |
a6468367 | 914 | int flags, QDict *options, Error **errp) |
b4b3ab14 FZ |
915 | { |
916 | int ret; | |
917 | uint32_t magic; | |
918 | uint32_t l1_size, l1_entry_sectors; | |
919 | VMDK4Header header; | |
cd466702 | 920 | VmdkExtent *extent = NULL; |
f4c129a3 | 921 | BDRVVmdkState *s = bs->opaque; |
bb45ded9 | 922 | int64_t l1_backup_offset = 0; |
3db1d98a | 923 | bool compressed; |
b4b3ab14 | 924 | |
32cc71de | 925 | ret = bdrv_pread(file, sizeof(magic), sizeof(header), &header, 0); |
b4b3ab14 | 926 | if (ret < 0) { |
f30c66ba | 927 | bdrv_refresh_filename(file->bs); |
4823970b FZ |
928 | error_setg_errno(errp, -ret, |
929 | "Could not read header from file '%s'", | |
24bc15d1 | 930 | file->bs->filename); |
89ac8480 | 931 | return -EINVAL; |
b4b3ab14 | 932 | } |
5a394b9e | 933 | if (header.capacity == 0) { |
e98768d4 | 934 | uint64_t desc_offset = le64_to_cpu(header.desc_offset); |
5a394b9e | 935 | if (desc_offset) { |
cf2ab8fc | 936 | char *buf = vmdk_read_desc(file, desc_offset << 9, errp); |
d1833ef5 PB |
937 | if (!buf) { |
938 | return -EINVAL; | |
939 | } | |
a6468367 | 940 | ret = vmdk_open_desc_file(bs, flags, buf, options, errp); |
d1833ef5 PB |
941 | g_free(buf); |
942 | return ret; | |
5a394b9e | 943 | } |
f16f509d | 944 | } |
65bd155c | 945 | |
f4c129a3 FZ |
946 | if (!s->create_type) { |
947 | s->create_type = g_strdup("monolithicSparse"); | |
948 | } | |
949 | ||
65bd155c KW |
950 | if (le64_to_cpu(header.gd_offset) == VMDK4_GD_AT_END) { |
951 | /* | |
952 | * The footer takes precedence over the header, so read it in. The | |
953 | * footer starts at offset -1024 from the end: One sector for the | |
954 | * footer, and another one for the end-of-stream marker. | |
955 | */ | |
956 | struct { | |
957 | struct { | |
958 | uint64_t val; | |
959 | uint32_t size; | |
960 | uint32_t type; | |
961 | uint8_t pad[512 - 16]; | |
962 | } QEMU_PACKED footer_marker; | |
963 | ||
964 | uint32_t magic; | |
965 | VMDK4Header header; | |
966 | uint8_t pad[512 - 4 - sizeof(VMDK4Header)]; | |
967 | ||
968 | struct { | |
969 | uint64_t val; | |
970 | uint32_t size; | |
971 | uint32_t type; | |
972 | uint8_t pad[512 - 16]; | |
973 | } QEMU_PACKED eos_marker; | |
974 | } QEMU_PACKED footer; | |
975 | ||
53fb7844 | 976 | ret = bdrv_pread(file, bs->file->bs->total_sectors * 512 - 1536, |
32cc71de | 977 | sizeof(footer), &footer, 0); |
65bd155c | 978 | if (ret < 0) { |
d899d2e2 | 979 | error_setg_errno(errp, -ret, "Failed to read footer"); |
65bd155c KW |
980 | return ret; |
981 | } | |
982 | ||
983 | /* Some sanity checks for the footer */ | |
984 | if (be32_to_cpu(footer.magic) != VMDK4_MAGIC || | |
985 | le32_to_cpu(footer.footer_marker.size) != 0 || | |
986 | le32_to_cpu(footer.footer_marker.type) != MARKER_FOOTER || | |
987 | le64_to_cpu(footer.eos_marker.val) != 0 || | |
988 | le32_to_cpu(footer.eos_marker.size) != 0 || | |
989 | le32_to_cpu(footer.eos_marker.type) != MARKER_END_OF_STREAM) | |
990 | { | |
d899d2e2 | 991 | error_setg(errp, "Invalid footer"); |
65bd155c KW |
992 | return -EINVAL; |
993 | } | |
994 | ||
995 | header = footer.header; | |
996 | } | |
997 | ||
3db1d98a FZ |
998 | compressed = |
999 | le16_to_cpu(header.compressAlgorithm) == VMDK4_COMPRESSION_DEFLATE; | |
509d39aa | 1000 | if (le32_to_cpu(header.version) > 3) { |
a55448b3 HR |
1001 | error_setg(errp, "Unsupported VMDK version %" PRIu32, |
1002 | le32_to_cpu(header.version)); | |
96c51eb5 | 1003 | return -ENOTSUP; |
3db1d98a FZ |
1004 | } else if (le32_to_cpu(header.version) == 3 && (flags & BDRV_O_RDWR) && |
1005 | !compressed) { | |
509d39aa FZ |
1006 | /* VMware KB 2064959 explains that version 3 added support for |
1007 | * persistent changed block tracking (CBT), and backup software can | |
1008 | * read it as version=1 if it doesn't care about the changed area | |
1009 | * information. So we are safe to enable read only. */ | |
1010 | error_setg(errp, "VMDK version 3 must be read only"); | |
1011 | return -EINVAL; | |
96c51eb5 FZ |
1012 | } |
1013 | ||
ca8804ce | 1014 | if (le32_to_cpu(header.num_gtes_per_gt) > 512) { |
89ac8480 | 1015 | error_setg(errp, "L2 table size too big"); |
f8ce0403 FZ |
1016 | return -EINVAL; |
1017 | } | |
1018 | ||
ca8804ce | 1019 | l1_entry_sectors = le32_to_cpu(header.num_gtes_per_gt) |
b4b3ab14 | 1020 | * le64_to_cpu(header.granularity); |
75d12341 | 1021 | if (l1_entry_sectors == 0) { |
d899d2e2 | 1022 | error_setg(errp, "L1 entry size is invalid"); |
86c6b429 FZ |
1023 | return -EINVAL; |
1024 | } | |
b4b3ab14 FZ |
1025 | l1_size = (le64_to_cpu(header.capacity) + l1_entry_sectors - 1) |
1026 | / l1_entry_sectors; | |
bb45ded9 FZ |
1027 | if (le32_to_cpu(header.flags) & VMDK4_FLAG_RGD) { |
1028 | l1_backup_offset = le64_to_cpu(header.rgd_offset) << 9; | |
1029 | } | |
24bc15d1 | 1030 | if (bdrv_nb_sectors(file->bs) < le64_to_cpu(header.grain_offset)) { |
4ab9dab5 FZ |
1031 | error_setg(errp, "File truncated, expecting at least %" PRId64 " bytes", |
1032 | (int64_t)(le64_to_cpu(header.grain_offset) | |
1033 | * BDRV_SECTOR_SIZE)); | |
34ceed81 FZ |
1034 | return -EINVAL; |
1035 | } | |
1036 | ||
8aa1331c | 1037 | ret = vmdk_add_extent(bs, file, false, |
b4b3ab14 FZ |
1038 | le64_to_cpu(header.capacity), |
1039 | le64_to_cpu(header.gd_offset) << 9, | |
bb45ded9 | 1040 | l1_backup_offset, |
b4b3ab14 | 1041 | l1_size, |
ca8804ce | 1042 | le32_to_cpu(header.num_gtes_per_gt), |
8aa1331c | 1043 | le64_to_cpu(header.granularity), |
4823970b FZ |
1044 | &extent, |
1045 | errp); | |
8aa1331c FZ |
1046 | if (ret < 0) { |
1047 | return ret; | |
1048 | } | |
432bb170 FZ |
1049 | extent->compressed = |
1050 | le16_to_cpu(header.compressAlgorithm) == VMDK4_COMPRESSION_DEFLATE; | |
d8a7b061 FZ |
1051 | if (extent->compressed) { |
1052 | g_free(s->create_type); | |
1053 | s->create_type = g_strdup("streamOptimized"); | |
1054 | } | |
432bb170 | 1055 | extent->has_marker = le32_to_cpu(header.flags) & VMDK4_FLAG_MARKER; |
14ead646 FZ |
1056 | extent->version = le32_to_cpu(header.version); |
1057 | extent->has_zero_grain = le32_to_cpu(header.flags) & VMDK4_FLAG_ZERO_GRAIN; | |
4823970b | 1058 | ret = vmdk_init_tables(bs, extent, errp); |
b4b3ab14 | 1059 | if (ret) { |
86c6b429 FZ |
1060 | /* free extent allocated by vmdk_add_extent */ |
1061 | vmdk_free_last_extent(bs); | |
b4b3ab14 | 1062 | } |
b4b3ab14 FZ |
1063 | return ret; |
1064 | } | |
1065 | ||
7fa60fa3 FZ |
1066 | /* find an option value out of descriptor file */ |
1067 | static int vmdk_parse_description(const char *desc, const char *opt_name, | |
1068 | char *buf, int buf_size) | |
1069 | { | |
1070 | char *opt_pos, *opt_end; | |
1071 | const char *end = desc + strlen(desc); | |
1072 | ||
1073 | opt_pos = strstr(desc, opt_name); | |
1074 | if (!opt_pos) { | |
65f74725 | 1075 | return VMDK_ERROR; |
7fa60fa3 FZ |
1076 | } |
1077 | /* Skip "=\"" following opt_name */ | |
1078 | opt_pos += strlen(opt_name) + 2; | |
1079 | if (opt_pos >= end) { | |
65f74725 | 1080 | return VMDK_ERROR; |
7fa60fa3 FZ |
1081 | } |
1082 | opt_end = opt_pos; | |
1083 | while (opt_end < end && *opt_end != '"') { | |
1084 | opt_end++; | |
1085 | } | |
1086 | if (opt_end == end || buf_size < opt_end - opt_pos + 1) { | |
65f74725 | 1087 | return VMDK_ERROR; |
7fa60fa3 FZ |
1088 | } |
1089 | pstrcpy(buf, opt_end - opt_pos + 1, opt_pos); | |
65f74725 | 1090 | return VMDK_OK; |
7fa60fa3 FZ |
1091 | } |
1092 | ||
86c6b429 | 1093 | /* Open an extent file and append to bs array */ |
24bc15d1 | 1094 | static int vmdk_open_sparse(BlockDriverState *bs, BdrvChild *file, int flags, |
a6468367 | 1095 | char *buf, QDict *options, Error **errp) |
86c6b429 FZ |
1096 | { |
1097 | uint32_t magic; | |
1098 | ||
d1833ef5 | 1099 | magic = ldl_be_p(buf); |
86c6b429 FZ |
1100 | switch (magic) { |
1101 | case VMDK3_MAGIC: | |
4823970b | 1102 | return vmdk_open_vmfs_sparse(bs, file, flags, errp); |
86c6b429 | 1103 | case VMDK4_MAGIC: |
a6468367 | 1104 | return vmdk_open_vmdk4(bs, file, flags, options, errp); |
86c6b429 | 1105 | default: |
76abe407 PB |
1106 | error_setg(errp, "Image not in VMDK format"); |
1107 | return -EINVAL; | |
86c6b429 FZ |
1108 | } |
1109 | } | |
1110 | ||
e4937694 MA |
1111 | static const char *next_line(const char *s) |
1112 | { | |
1113 | while (*s) { | |
1114 | if (*s == '\n') { | |
1115 | return s + 1; | |
1116 | } | |
1117 | s++; | |
1118 | } | |
1119 | return s; | |
1120 | } | |
1121 | ||
7fa60fa3 | 1122 | static int vmdk_parse_extents(const char *desc, BlockDriverState *bs, |
cdc0dd25 | 1123 | QDict *options, Error **errp) |
7fa60fa3 FZ |
1124 | { |
1125 | int ret; | |
395a22fa | 1126 | int matches; |
7fa60fa3 FZ |
1127 | char access[11]; |
1128 | char type[11]; | |
1129 | char fname[512]; | |
d28d737f | 1130 | const char *p, *np; |
7fa60fa3 FZ |
1131 | int64_t sectors = 0; |
1132 | int64_t flat_offset; | |
cdc0dd25 | 1133 | char *desc_file_dir = NULL; |
fe206562 | 1134 | char *extent_path; |
24bc15d1 | 1135 | BdrvChild *extent_file; |
8b1869da | 1136 | BdrvChildRole extent_role; |
f4c129a3 | 1137 | BDRVVmdkState *s = bs->opaque; |
cd466702 | 1138 | VmdkExtent *extent = NULL; |
a6468367 | 1139 | char extent_opt_prefix[32]; |
24bc15d1 | 1140 | Error *local_err = NULL; |
7fa60fa3 | 1141 | |
e4937694 | 1142 | for (p = desc; *p; p = next_line(p)) { |
8a3e0bc3 FZ |
1143 | /* parse extent line in one of below formats: |
1144 | * | |
7fa60fa3 | 1145 | * RW [size in sectors] FLAT "file-name.vmdk" OFFSET |
7fa60fa3 | 1146 | * RW [size in sectors] SPARSE "file-name.vmdk" |
8a3e0bc3 FZ |
1147 | * RW [size in sectors] VMFS "file-name.vmdk" |
1148 | * RW [size in sectors] VMFSSPARSE "file-name.vmdk" | |
98eb9733 | 1149 | * RW [size in sectors] SESPARSE "file-name.vmdk" |
7fa60fa3 FZ |
1150 | */ |
1151 | flat_offset = -1; | |
395a22fa JC |
1152 | matches = sscanf(p, "%10s %" SCNd64 " %10s \"%511[^\n\r\"]\" %" SCNd64, |
1153 | access, §ors, type, fname, &flat_offset); | |
1154 | if (matches < 4 || strcmp(access, "RW")) { | |
e4937694 | 1155 | continue; |
7fa60fa3 | 1156 | } else if (!strcmp(type, "FLAT")) { |
395a22fa | 1157 | if (matches != 5 || flat_offset < 0) { |
d28d737f | 1158 | goto invalid; |
7fa60fa3 | 1159 | } |
dbbcaa8d | 1160 | } else if (!strcmp(type, "VMFS")) { |
395a22fa | 1161 | if (matches == 4) { |
b47053bd FZ |
1162 | flat_offset = 0; |
1163 | } else { | |
d28d737f | 1164 | goto invalid; |
b47053bd | 1165 | } |
395a22fa | 1166 | } else if (matches != 4) { |
d28d737f | 1167 | goto invalid; |
7fa60fa3 FZ |
1168 | } |
1169 | ||
7fa60fa3 | 1170 | if (sectors <= 0 || |
daac8fdc | 1171 | (strcmp(type, "FLAT") && strcmp(type, "SPARSE") && |
98eb9733 SE |
1172 | strcmp(type, "VMFS") && strcmp(type, "VMFSSPARSE") && |
1173 | strcmp(type, "SESPARSE")) || | |
7fa60fa3 | 1174 | (strcmp(access, "RW"))) { |
e4937694 | 1175 | continue; |
7fa60fa3 FZ |
1176 | } |
1177 | ||
cdc0dd25 HR |
1178 | if (path_is_absolute(fname)) { |
1179 | extent_path = g_strdup(fname); | |
1180 | } else { | |
1181 | if (!desc_file_dir) { | |
1182 | desc_file_dir = bdrv_dirname(bs->file->bs, errp); | |
1183 | if (!desc_file_dir) { | |
1184 | bdrv_refresh_filename(bs->file->bs); | |
1185 | error_prepend(errp, "Cannot use relative paths with VMDK " | |
1186 | "descriptor file '%s': ", | |
1187 | bs->file->bs->filename); | |
1188 | ret = -EINVAL; | |
1189 | goto out; | |
1190 | } | |
1191 | } | |
5c98415b | 1192 | |
cdc0dd25 HR |
1193 | extent_path = g_strconcat(desc_file_dir, fname, NULL); |
1194 | } | |
a6468367 KW |
1195 | |
1196 | ret = snprintf(extent_opt_prefix, 32, "extents.%d", s->num_extents); | |
1197 | assert(ret < 32); | |
1198 | ||
8b1869da HR |
1199 | extent_role = BDRV_CHILD_DATA; |
1200 | if (strcmp(type, "FLAT") != 0 && strcmp(type, "VMFS") != 0) { | |
1201 | /* non-flat extents have metadata */ | |
1202 | extent_role |= BDRV_CHILD_METADATA; | |
1203 | } | |
1204 | ||
24bc15d1 | 1205 | extent_file = bdrv_open_child(extent_path, options, extent_opt_prefix, |
8b1869da HR |
1206 | bs, &child_of_bds, extent_role, false, |
1207 | &local_err); | |
fe206562 | 1208 | g_free(extent_path); |
24bc15d1 KW |
1209 | if (local_err) { |
1210 | error_propagate(errp, local_err); | |
cdc0dd25 HR |
1211 | ret = -EINVAL; |
1212 | goto out; | |
86c6b429 FZ |
1213 | } |
1214 | ||
7fa60fa3 | 1215 | /* save to extents array */ |
04d542c8 | 1216 | if (!strcmp(type, "FLAT") || !strcmp(type, "VMFS")) { |
7fa60fa3 | 1217 | /* FLAT extent */ |
7fa60fa3 | 1218 | |
8aa1331c | 1219 | ret = vmdk_add_extent(bs, extent_file, true, sectors, |
4823970b | 1220 | 0, 0, 0, 0, 0, &extent, errp); |
8aa1331c | 1221 | if (ret < 0) { |
24bc15d1 | 1222 | bdrv_unref_child(bs, extent_file); |
cdc0dd25 | 1223 | goto out; |
8aa1331c | 1224 | } |
f16f509d | 1225 | extent->flat_start_offset = flat_offset << 9; |
daac8fdc FZ |
1226 | } else if (!strcmp(type, "SPARSE") || !strcmp(type, "VMFSSPARSE")) { |
1227 | /* SPARSE extent and VMFSSPARSE extent are both "COWD" sparse file*/ | |
cf2ab8fc | 1228 | char *buf = vmdk_read_desc(extent_file, 0, errp); |
d1833ef5 PB |
1229 | if (!buf) { |
1230 | ret = -EINVAL; | |
1231 | } else { | |
a6468367 KW |
1232 | ret = vmdk_open_sparse(bs, extent_file, bs->open_flags, buf, |
1233 | options, errp); | |
d1833ef5 | 1234 | } |
b6b1d31f | 1235 | g_free(buf); |
86c6b429 | 1236 | if (ret) { |
24bc15d1 | 1237 | bdrv_unref_child(bs, extent_file); |
cdc0dd25 | 1238 | goto out; |
86c6b429 | 1239 | } |
f4c129a3 | 1240 | extent = &s->extents[s->num_extents - 1]; |
98eb9733 SE |
1241 | } else if (!strcmp(type, "SESPARSE")) { |
1242 | ret = vmdk_open_se_sparse(bs, extent_file, bs->open_flags, errp); | |
1243 | if (ret) { | |
1244 | bdrv_unref_child(bs, extent_file); | |
cdc0dd25 | 1245 | goto out; |
98eb9733 SE |
1246 | } |
1247 | extent = &s->extents[s->num_extents - 1]; | |
7fa60fa3 | 1248 | } else { |
4823970b | 1249 | error_setg(errp, "Unsupported extent type '%s'", type); |
24bc15d1 | 1250 | bdrv_unref_child(bs, extent_file); |
cdc0dd25 HR |
1251 | ret = -ENOTSUP; |
1252 | goto out; | |
7fa60fa3 | 1253 | } |
f4c129a3 | 1254 | extent->type = g_strdup(type); |
7fa60fa3 | 1255 | } |
cdc0dd25 HR |
1256 | |
1257 | ret = 0; | |
1258 | goto out; | |
d28d737f MA |
1259 | |
1260 | invalid: | |
1261 | np = next_line(p); | |
1262 | assert(np != p); | |
1263 | if (np[-1] == '\n') { | |
1264 | np--; | |
1265 | } | |
1266 | error_setg(errp, "Invalid extent line: %.*s", (int)(np - p), p); | |
cdc0dd25 HR |
1267 | ret = -EINVAL; |
1268 | ||
1269 | out: | |
1270 | g_free(desc_file_dir); | |
1271 | return ret; | |
7fa60fa3 FZ |
1272 | } |
1273 | ||
d1833ef5 | 1274 | static int vmdk_open_desc_file(BlockDriverState *bs, int flags, char *buf, |
a6468367 | 1275 | QDict *options, Error **errp) |
7fa60fa3 FZ |
1276 | { |
1277 | int ret; | |
7fa60fa3 FZ |
1278 | char ct[128]; |
1279 | BDRVVmdkState *s = bs->opaque; | |
1280 | ||
7fa60fa3 | 1281 | if (vmdk_parse_description(buf, "createType", ct, sizeof(ct))) { |
76abe407 PB |
1282 | error_setg(errp, "invalid VMDK image descriptor"); |
1283 | ret = -EINVAL; | |
0bed087d | 1284 | goto exit; |
7fa60fa3 | 1285 | } |
6398de51 | 1286 | if (strcmp(ct, "monolithicFlat") && |
04d542c8 | 1287 | strcmp(ct, "vmfs") && |
daac8fdc | 1288 | strcmp(ct, "vmfsSparse") && |
98eb9733 | 1289 | strcmp(ct, "seSparse") && |
86c6b429 | 1290 | strcmp(ct, "twoGbMaxExtentSparse") && |
6398de51 | 1291 | strcmp(ct, "twoGbMaxExtentFlat")) { |
4823970b | 1292 | error_setg(errp, "Unsupported image type '%s'", ct); |
0bed087d EB |
1293 | ret = -ENOTSUP; |
1294 | goto exit; | |
7fa60fa3 | 1295 | } |
f4c129a3 | 1296 | s->create_type = g_strdup(ct); |
7fa60fa3 | 1297 | s->desc_offset = 0; |
cdc0dd25 | 1298 | ret = vmdk_parse_extents(buf, bs, options, errp); |
0bed087d | 1299 | exit: |
0bed087d | 1300 | return ret; |
7fa60fa3 FZ |
1301 | } |
1302 | ||
015a1036 HR |
1303 | static int vmdk_open(BlockDriverState *bs, QDict *options, int flags, |
1304 | Error **errp) | |
b4b3ab14 | 1305 | { |
9aeecbbc | 1306 | char *buf; |
86c6b429 FZ |
1307 | int ret; |
1308 | BDRVVmdkState *s = bs->opaque; | |
37f09e5e | 1309 | uint32_t magic; |
b4b3ab14 | 1310 | |
83930780 VSO |
1311 | ret = bdrv_open_file_child(NULL, options, "file", bs, errp); |
1312 | if (ret < 0) { | |
1313 | return ret; | |
4e4bf5c4 KW |
1314 | } |
1315 | ||
cf2ab8fc | 1316 | buf = vmdk_read_desc(bs->file, 0, errp); |
d1833ef5 PB |
1317 | if (!buf) { |
1318 | return -EINVAL; | |
1319 | } | |
1320 | ||
37f09e5e PB |
1321 | magic = ldl_be_p(buf); |
1322 | switch (magic) { | |
1323 | case VMDK3_MAGIC: | |
1324 | case VMDK4_MAGIC: | |
9a4f4c31 | 1325 | ret = vmdk_open_sparse(bs, bs->file, flags, buf, options, |
24bc15d1 | 1326 | errp); |
37f09e5e PB |
1327 | s->desc_offset = 0x200; |
1328 | break; | |
1329 | default: | |
8b1869da HR |
1330 | /* No data in the descriptor file */ |
1331 | bs->file->role &= ~BDRV_CHILD_DATA; | |
1332 | ||
1333 | /* Must succeed because we have given up permissions if anything */ | |
1334 | bdrv_child_refresh_perms(bs, bs->file, &error_abort); | |
1335 | ||
a6468367 | 1336 | ret = vmdk_open_desc_file(bs, flags, buf, options, errp); |
37f09e5e | 1337 | break; |
b4b3ab14 | 1338 | } |
37f09e5e PB |
1339 | if (ret) { |
1340 | goto fail; | |
1341 | } | |
1342 | ||
bae0a0cc PB |
1343 | /* try to open parent images, if exist */ |
1344 | ret = vmdk_parent_open(bs); | |
1345 | if (ret) { | |
1346 | goto fail; | |
1347 | } | |
9877860e PM |
1348 | ret = vmdk_read_cid(bs, 0, &s->cid); |
1349 | if (ret) { | |
1350 | goto fail; | |
1351 | } | |
1352 | ret = vmdk_read_cid(bs, 1, &s->parent_cid); | |
1353 | if (ret) { | |
1354 | goto fail; | |
1355 | } | |
848c66e8 | 1356 | qemu_co_mutex_init(&s->lock); |
2bc3166c KW |
1357 | |
1358 | /* Disable migration when VMDK images are used */ | |
81e5f78a AG |
1359 | error_setg(&s->migration_blocker, "The vmdk format used by node '%s' " |
1360 | "does not support live migration", | |
1361 | bdrv_get_device_or_node_name(bs)); | |
386f6c07 MA |
1362 | ret = migrate_add_blocker(s->migration_blocker, errp); |
1363 | if (ret < 0) { | |
fe44dc91 AA |
1364 | error_free(s->migration_blocker); |
1365 | goto fail; | |
1366 | } | |
1367 | ||
d1833ef5 | 1368 | g_free(buf); |
2bc3166c | 1369 | return 0; |
bae0a0cc PB |
1370 | |
1371 | fail: | |
d1833ef5 | 1372 | g_free(buf); |
f4c129a3 FZ |
1373 | g_free(s->create_type); |
1374 | s->create_type = NULL; | |
bae0a0cc PB |
1375 | vmdk_free_extents(bs); |
1376 | return ret; | |
ea2384d3 FB |
1377 | } |
1378 | ||
d34682cd | 1379 | |
3baca891 | 1380 | static void vmdk_refresh_limits(BlockDriverState *bs, Error **errp) |
d34682cd KW |
1381 | { |
1382 | BDRVVmdkState *s = bs->opaque; | |
1383 | int i; | |
1384 | ||
1385 | for (i = 0; i < s->num_extents; i++) { | |
1386 | if (!s->extents[i].flat) { | |
cf081fca EB |
1387 | bs->bl.pwrite_zeroes_alignment = |
1388 | MAX(bs->bl.pwrite_zeroes_alignment, | |
1389 | s->extents[i].cluster_sectors << BDRV_SECTOR_BITS); | |
d34682cd KW |
1390 | } |
1391 | } | |
d34682cd KW |
1392 | } |
1393 | ||
c6ac36e1 FZ |
1394 | /** |
1395 | * get_whole_cluster | |
1396 | * | |
1397 | * Copy backing file's cluster that covers @sector_num, otherwise write zero, | |
4823cde5 KW |
1398 | * to the cluster at @cluster_sector_num. If @zeroed is true, we're overwriting |
1399 | * a zeroed cluster in the current layer and must not copy data from the | |
1400 | * backing file. | |
c6ac36e1 FZ |
1401 | * |
1402 | * If @skip_start_sector < @skip_end_sector, the relative range | |
1403 | * [@skip_start_sector, @skip_end_sector) is not copied or written, and leave | |
1404 | * it for call to write user data in the request. | |
1405 | */ | |
c9d43d0d PB |
1406 | static int coroutine_fn get_whole_cluster(BlockDriverState *bs, |
1407 | VmdkExtent *extent, | |
1408 | uint64_t cluster_offset, | |
1409 | uint64_t offset, | |
1410 | uint64_t skip_start_bytes, | |
1411 | uint64_t skip_end_bytes, | |
1412 | bool zeroed) | |
5f4da8c0 | 1413 | { |
bf81507d | 1414 | int ret = VMDK_OK; |
c6ac36e1 FZ |
1415 | int64_t cluster_bytes; |
1416 | uint8_t *whole_grain; | |
4823cde5 | 1417 | bool copy_from_backing; |
c6ac36e1 FZ |
1418 | |
1419 | /* For COW, align request sector_num to cluster start */ | |
c6ac36e1 | 1420 | cluster_bytes = extent->cluster_sectors << BDRV_SECTOR_BITS; |
37b1d7d8 | 1421 | offset = QEMU_ALIGN_DOWN(offset, cluster_bytes); |
c6ac36e1 | 1422 | whole_grain = qemu_blockalign(bs, cluster_bytes); |
4823cde5 | 1423 | copy_from_backing = bs->backing && !zeroed; |
5f4da8c0 | 1424 | |
4823cde5 | 1425 | if (!copy_from_backing) { |
37b1d7d8 KW |
1426 | memset(whole_grain, 0, skip_start_bytes); |
1427 | memset(whole_grain + skip_end_bytes, 0, cluster_bytes - skip_end_bytes); | |
c6ac36e1 FZ |
1428 | } |
1429 | ||
37b1d7d8 | 1430 | assert(skip_end_bytes <= cluster_bytes); |
0e69c543 FZ |
1431 | /* we will be here if it's first write on non-exist grain(cluster). |
1432 | * try to read from parent image, if exist */ | |
760e0063 | 1433 | if (bs->backing && !vmdk_is_cid_valid(bs)) { |
c6ac36e1 FZ |
1434 | ret = VMDK_ERROR; |
1435 | goto exit; | |
1436 | } | |
5f4da8c0 | 1437 | |
c6ac36e1 | 1438 | /* Read backing data before skip range */ |
37b1d7d8 | 1439 | if (skip_start_bytes > 0) { |
4823cde5 | 1440 | if (copy_from_backing) { |
23c4b2a8 HR |
1441 | /* qcow2 emits this on bs->file instead of bs->backing */ |
1442 | BLKDBG_EVENT(extent->file, BLKDBG_COW_READ); | |
a5c4e5be AF |
1443 | ret = bdrv_co_pread(bs->backing, offset, skip_start_bytes, |
1444 | whole_grain, 0); | |
c6ac36e1 FZ |
1445 | if (ret < 0) { |
1446 | ret = VMDK_ERROR; | |
1447 | goto exit; | |
1448 | } | |
1449 | } | |
23c4b2a8 | 1450 | BLKDBG_EVENT(extent->file, BLKDBG_COW_WRITE); |
a5c4e5be AF |
1451 | ret = bdrv_co_pwrite(extent->file, cluster_offset, skip_start_bytes, |
1452 | whole_grain, 0); | |
c336500d | 1453 | if (ret < 0) { |
bf81507d FZ |
1454 | ret = VMDK_ERROR; |
1455 | goto exit; | |
c336500d | 1456 | } |
c6ac36e1 FZ |
1457 | } |
1458 | /* Read backing data after skip range */ | |
37b1d7d8 | 1459 | if (skip_end_bytes < cluster_bytes) { |
4823cde5 | 1460 | if (copy_from_backing) { |
23c4b2a8 HR |
1461 | /* qcow2 emits this on bs->file instead of bs->backing */ |
1462 | BLKDBG_EVENT(extent->file, BLKDBG_COW_READ); | |
a5c4e5be AF |
1463 | ret = bdrv_co_pread(bs->backing, offset + skip_end_bytes, |
1464 | cluster_bytes - skip_end_bytes, | |
1465 | whole_grain + skip_end_bytes, 0); | |
c6ac36e1 FZ |
1466 | if (ret < 0) { |
1467 | ret = VMDK_ERROR; | |
1468 | goto exit; | |
1469 | } | |
1470 | } | |
23c4b2a8 | 1471 | BLKDBG_EVENT(extent->file, BLKDBG_COW_WRITE); |
a5c4e5be AF |
1472 | ret = bdrv_co_pwrite(extent->file, cluster_offset + skip_end_bytes, |
1473 | cluster_bytes - skip_end_bytes, | |
1474 | whole_grain + skip_end_bytes, 0); | |
c336500d | 1475 | if (ret < 0) { |
bf81507d FZ |
1476 | ret = VMDK_ERROR; |
1477 | goto exit; | |
630530a6 TS |
1478 | } |
1479 | } | |
c6ac36e1 | 1480 | |
37b1d7d8 | 1481 | ret = VMDK_OK; |
bf81507d FZ |
1482 | exit: |
1483 | qemu_vfree(whole_grain); | |
1484 | return ret; | |
630530a6 TS |
1485 | } |
1486 | ||
c9d43d0d PB |
1487 | static int coroutine_fn vmdk_L2update(VmdkExtent *extent, VmdkMetaData *m_data, |
1488 | uint32_t offset) | |
630530a6 | 1489 | { |
c6ac36e1 | 1490 | offset = cpu_to_le32(offset); |
630530a6 | 1491 | /* update L2 table */ |
23c4b2a8 | 1492 | BLKDBG_EVENT(extent->file, BLKDBG_L2_UPDATE); |
a5c4e5be AF |
1493 | if (bdrv_co_pwrite(extent->file, |
1494 | ((int64_t)m_data->l2_offset * 512) | |
1495 | + (m_data->l2_index * sizeof(offset)), | |
1496 | sizeof(offset), &offset, 0) < 0) { | |
65f74725 | 1497 | return VMDK_ERROR; |
b3976d3c | 1498 | } |
630530a6 | 1499 | /* update backup L2 table */ |
b3976d3c FZ |
1500 | if (extent->l1_backup_table_offset != 0) { |
1501 | m_data->l2_offset = extent->l1_backup_table[m_data->l1_index]; | |
a5c4e5be AF |
1502 | if (bdrv_co_pwrite(extent->file, |
1503 | ((int64_t)m_data->l2_offset * 512) | |
1504 | + (m_data->l2_index * sizeof(offset)), | |
1505 | sizeof(offset), &offset, 0) < 0) { | |
65f74725 | 1506 | return VMDK_ERROR; |
b3976d3c | 1507 | } |
5f4da8c0 | 1508 | } |
a5c4e5be | 1509 | if (bdrv_co_flush(extent->file->bs) < 0) { |
2758be05 KW |
1510 | return VMDK_ERROR; |
1511 | } | |
cdeaf1f1 FZ |
1512 | if (m_data->l2_cache_entry) { |
1513 | *m_data->l2_cache_entry = offset; | |
1514 | } | |
630530a6 | 1515 | |
65f74725 | 1516 | return VMDK_OK; |
5f4da8c0 TS |
1517 | } |
1518 | ||
c6ac36e1 FZ |
1519 | /** |
1520 | * get_cluster_offset | |
1521 | * | |
1522 | * Look up cluster offset in extent file by sector number, and store in | |
1523 | * @cluster_offset. | |
1524 | * | |
1525 | * For flat extents, the start offset as parsed from the description file is | |
1526 | * returned. | |
1527 | * | |
1528 | * For sparse extents, look up in L1, L2 table. If allocate is true, return an | |
1529 | * offset for a new cluster and update L2 cache. If there is a backing file, | |
1530 | * COW is done before returning; otherwise, zeroes are written to the allocated | |
1531 | * cluster. Both COW and zero writing skips the sector range | |
1532 | * [@skip_start_sector, @skip_end_sector) passed in by caller, because caller | |
1533 | * has new data to write there. | |
1534 | * | |
1535 | * Returns: VMDK_OK if cluster exists and mapped in the image. | |
1536 | * VMDK_UNALLOC if cluster is not mapped and @allocate is false. | |
1537 | * VMDK_ERROR if failed. | |
1538 | */ | |
c9d43d0d PB |
1539 | static int coroutine_fn get_cluster_offset(BlockDriverState *bs, |
1540 | VmdkExtent *extent, | |
1541 | VmdkMetaData *m_data, | |
1542 | uint64_t offset, | |
1543 | bool allocate, | |
1544 | uint64_t *cluster_offset, | |
1545 | uint64_t skip_start_bytes, | |
1546 | uint64_t skip_end_bytes) | |
ea2384d3 | 1547 | { |
ea2384d3 FB |
1548 | unsigned int l1_index, l2_offset, l2_index; |
1549 | int min_index, i, j; | |
98eb9733 SE |
1550 | uint32_t min_count; |
1551 | void *l2_table; | |
14ead646 | 1552 | bool zeroed = false; |
c6ac36e1 | 1553 | int64_t ret; |
d1319b07 | 1554 | int64_t cluster_sector; |
98eb9733 | 1555 | unsigned int l2_size_bytes = extent->l2_size * extent->entry_size; |
630530a6 | 1556 | |
ae261c86 | 1557 | if (m_data) { |
4dc20e64 | 1558 | m_data->new_allocation = false; |
ae261c86 | 1559 | } |
91b85bd3 | 1560 | if (extent->flat) { |
7fa60fa3 | 1561 | *cluster_offset = extent->flat_start_offset; |
65f74725 | 1562 | return VMDK_OK; |
91b85bd3 | 1563 | } |
630530a6 | 1564 | |
6398de51 | 1565 | offset -= (extent->end_sector - extent->sectors) * SECTOR_SIZE; |
b3976d3c FZ |
1566 | l1_index = (offset >> 9) / extent->l1_entry_sectors; |
1567 | if (l1_index >= extent->l1_size) { | |
65f74725 | 1568 | return VMDK_ERROR; |
b3976d3c | 1569 | } |
98eb9733 SE |
1570 | if (extent->sesparse) { |
1571 | uint64_t l2_offset_u64; | |
1572 | ||
1573 | assert(extent->entry_size == sizeof(uint64_t)); | |
1574 | ||
1575 | l2_offset_u64 = ((uint64_t *)extent->l1_table)[l1_index]; | |
1576 | if (l2_offset_u64 == 0) { | |
1577 | l2_offset = 0; | |
1578 | } else if ((l2_offset_u64 & 0xffffffff00000000) != 0x1000000000000000) { | |
1579 | /* | |
1580 | * Top most nibble is 0x1 if grain table is allocated. | |
1581 | * strict check - top most 4 bytes must be 0x10000000 since max | |
1582 | * supported size is 64TB for disk - so no more than 64TB / 16MB | |
1583 | * grain directories which is smaller than uint32, | |
1584 | * where 16MB is the only supported default grain table coverage. | |
1585 | */ | |
1586 | return VMDK_ERROR; | |
1587 | } else { | |
1588 | l2_offset_u64 = l2_offset_u64 & 0x00000000ffffffff; | |
1589 | l2_offset_u64 = extent->sesparse_l2_tables_offset + | |
1590 | l2_offset_u64 * l2_size_bytes / SECTOR_SIZE; | |
1591 | if (l2_offset_u64 > 0x00000000ffffffff) { | |
1592 | return VMDK_ERROR; | |
1593 | } | |
1594 | l2_offset = (unsigned int)(l2_offset_u64); | |
1595 | } | |
1596 | } else { | |
1597 | assert(extent->entry_size == sizeof(uint32_t)); | |
1598 | l2_offset = ((uint32_t *)extent->l1_table)[l1_index]; | |
1599 | } | |
b3976d3c | 1600 | if (!l2_offset) { |
65f74725 | 1601 | return VMDK_UNALLOC; |
b3976d3c | 1602 | } |
b4b3ab14 | 1603 | for (i = 0; i < L2_CACHE_SIZE; i++) { |
b3976d3c | 1604 | if (l2_offset == extent->l2_cache_offsets[i]) { |
ea2384d3 | 1605 | /* increment the hit count */ |
b3976d3c | 1606 | if (++extent->l2_cache_counts[i] == 0xffffffff) { |
b4b3ab14 | 1607 | for (j = 0; j < L2_CACHE_SIZE; j++) { |
b3976d3c | 1608 | extent->l2_cache_counts[j] >>= 1; |
ea2384d3 FB |
1609 | } |
1610 | } | |
98eb9733 | 1611 | l2_table = (char *)extent->l2_cache + (i * l2_size_bytes); |
ea2384d3 FB |
1612 | goto found; |
1613 | } | |
1614 | } | |
1615 | /* not found: load a new entry in the least used one */ | |
1616 | min_index = 0; | |
1617 | min_count = 0xffffffff; | |
b4b3ab14 | 1618 | for (i = 0; i < L2_CACHE_SIZE; i++) { |
b3976d3c FZ |
1619 | if (extent->l2_cache_counts[i] < min_count) { |
1620 | min_count = extent->l2_cache_counts[i]; | |
ea2384d3 FB |
1621 | min_index = i; |
1622 | } | |
1623 | } | |
98eb9733 | 1624 | l2_table = (char *)extent->l2_cache + (min_index * l2_size_bytes); |
23c4b2a8 | 1625 | BLKDBG_EVENT(extent->file, BLKDBG_L2_LOAD); |
a5c4e5be | 1626 | if (bdrv_co_pread(extent->file, |
b3976d3c | 1627 | (int64_t)l2_offset * 512, |
53fb7844 | 1628 | l2_size_bytes, |
a5c4e5be | 1629 | l2_table, 0 |
353a5d84 | 1630 | ) < 0) { |
65f74725 | 1631 | return VMDK_ERROR; |
b3976d3c | 1632 | } |
5f4da8c0 | 1633 | |
b3976d3c FZ |
1634 | extent->l2_cache_offsets[min_index] = l2_offset; |
1635 | extent->l2_cache_counts[min_index] = 1; | |
ea2384d3 | 1636 | found: |
b3976d3c | 1637 | l2_index = ((offset >> 9) / extent->cluster_sectors) % extent->l2_size; |
2821c1cc KW |
1638 | if (m_data) { |
1639 | m_data->l1_index = l1_index; | |
1640 | m_data->l2_index = l2_index; | |
1641 | m_data->l2_offset = l2_offset; | |
1642 | m_data->l2_cache_entry = ((uint32_t *)l2_table) + l2_index; | |
1643 | } | |
630530a6 | 1644 | |
98eb9733 SE |
1645 | if (extent->sesparse) { |
1646 | cluster_sector = le64_to_cpu(((uint64_t *)l2_table)[l2_index]); | |
1647 | switch (cluster_sector & 0xf000000000000000) { | |
1648 | case 0x0000000000000000: | |
1649 | /* unallocated grain */ | |
1650 | if (cluster_sector != 0) { | |
1651 | return VMDK_ERROR; | |
1652 | } | |
1653 | break; | |
1654 | case 0x1000000000000000: | |
1655 | /* scsi-unmapped grain - fallthrough */ | |
1656 | case 0x2000000000000000: | |
1657 | /* zero grain */ | |
1658 | zeroed = true; | |
1659 | break; | |
1660 | case 0x3000000000000000: | |
1661 | /* allocated grain */ | |
1662 | cluster_sector = (((cluster_sector & 0x0fff000000000000) >> 48) | | |
1663 | ((cluster_sector & 0x0000ffffffffffff) << 12)); | |
1664 | cluster_sector = extent->sesparse_clusters_offset + | |
1665 | cluster_sector * extent->cluster_sectors; | |
1666 | break; | |
1667 | default: | |
1668 | return VMDK_ERROR; | |
1669 | } | |
1670 | } else { | |
1671 | cluster_sector = le32_to_cpu(((uint32_t *)l2_table)[l2_index]); | |
1672 | ||
1673 | if (extent->has_zero_grain && cluster_sector == VMDK_GTE_ZEROED) { | |
1674 | zeroed = true; | |
1675 | } | |
14ead646 FZ |
1676 | } |
1677 | ||
c6ac36e1 | 1678 | if (!cluster_sector || zeroed) { |
91b85bd3 | 1679 | if (!allocate) { |
14ead646 | 1680 | return zeroed ? VMDK_ZEROED : VMDK_UNALLOC; |
91b85bd3 | 1681 | } |
98eb9733 | 1682 | assert(!extent->sesparse); |
9949f97e | 1683 | |
a77672ea YCL |
1684 | if (extent->next_cluster_sector >= VMDK_EXTENT_MAX_SECTORS) { |
1685 | return VMDK_ERROR; | |
1686 | } | |
1687 | ||
c6ac36e1 FZ |
1688 | cluster_sector = extent->next_cluster_sector; |
1689 | extent->next_cluster_sector += extent->cluster_sectors; | |
630530a6 | 1690 | |
630530a6 TS |
1691 | /* First of all we write grain itself, to avoid race condition |
1692 | * that may to corrupt the image. | |
1693 | * This problem may occur because of insufficient space on host disk | |
1694 | * or inappropriate VM shutdown. | |
1695 | */ | |
37b1d7d8 | 1696 | ret = get_whole_cluster(bs, extent, cluster_sector * BDRV_SECTOR_SIZE, |
4823cde5 KW |
1697 | offset, skip_start_bytes, skip_end_bytes, |
1698 | zeroed); | |
c6ac36e1 FZ |
1699 | if (ret) { |
1700 | return ret; | |
630530a6 | 1701 | } |
524089bc | 1702 | if (m_data) { |
4dc20e64 | 1703 | m_data->new_allocation = true; |
524089bc | 1704 | } |
ff1afc72 | 1705 | } |
c6ac36e1 | 1706 | *cluster_offset = cluster_sector << BDRV_SECTOR_BITS; |
65f74725 | 1707 | return VMDK_OK; |
ea2384d3 FB |
1708 | } |
1709 | ||
b3976d3c FZ |
1710 | static VmdkExtent *find_extent(BDRVVmdkState *s, |
1711 | int64_t sector_num, VmdkExtent *start_hint) | |
1712 | { | |
1713 | VmdkExtent *extent = start_hint; | |
1714 | ||
1715 | if (!extent) { | |
1716 | extent = &s->extents[0]; | |
1717 | } | |
1718 | while (extent < &s->extents[s->num_extents]) { | |
1719 | if (sector_num < extent->end_sector) { | |
1720 | return extent; | |
1721 | } | |
1722 | extent++; | |
1723 | } | |
1724 | return NULL; | |
1725 | } | |
1726 | ||
a844a2b0 KW |
1727 | static inline uint64_t vmdk_find_offset_in_cluster(VmdkExtent *extent, |
1728 | int64_t offset) | |
1729 | { | |
9be38598 | 1730 | uint64_t extent_begin_offset, extent_relative_offset; |
a844a2b0 KW |
1731 | uint64_t cluster_size = extent->cluster_sectors * BDRV_SECTOR_SIZE; |
1732 | ||
1733 | extent_begin_offset = | |
1734 | (extent->end_sector - extent->sectors) * BDRV_SECTOR_SIZE; | |
1735 | extent_relative_offset = offset - extent_begin_offset; | |
9be38598 | 1736 | return extent_relative_offset % cluster_size; |
a844a2b0 KW |
1737 | } |
1738 | ||
c72080b9 EB |
1739 | static int coroutine_fn vmdk_co_block_status(BlockDriverState *bs, |
1740 | bool want_zero, | |
1741 | int64_t offset, int64_t bytes, | |
1742 | int64_t *pnum, int64_t *map, | |
1743 | BlockDriverState **file) | |
ea2384d3 FB |
1744 | { |
1745 | BDRVVmdkState *s = bs->opaque; | |
b3976d3c | 1746 | int64_t index_in_cluster, n, ret; |
c72080b9 | 1747 | uint64_t cluster_offset; |
b3976d3c FZ |
1748 | VmdkExtent *extent; |
1749 | ||
c72080b9 | 1750 | extent = find_extent(s, offset >> BDRV_SECTOR_BITS, NULL); |
b3976d3c | 1751 | if (!extent) { |
c72080b9 | 1752 | return -EIO; |
b3976d3c | 1753 | } |
f8a2e5e3 | 1754 | qemu_co_mutex_lock(&s->lock); |
c72080b9 | 1755 | ret = get_cluster_offset(bs, extent, NULL, offset, false, &cluster_offset, |
c6ac36e1 | 1756 | 0, 0); |
f8a2e5e3 | 1757 | qemu_co_mutex_unlock(&s->lock); |
14ead646 | 1758 | |
c72080b9 | 1759 | index_in_cluster = vmdk_find_offset_in_cluster(extent, offset); |
4bc74be9 PB |
1760 | switch (ret) { |
1761 | case VMDK_ERROR: | |
1762 | ret = -EIO; | |
1763 | break; | |
1764 | case VMDK_UNALLOC: | |
1765 | ret = 0; | |
1766 | break; | |
1767 | case VMDK_ZEROED: | |
1768 | ret = BDRV_BLOCK_ZERO; | |
1769 | break; | |
1770 | case VMDK_OK: | |
1771 | ret = BDRV_BLOCK_DATA; | |
e0f100f5 | 1772 | if (!extent->compressed) { |
d0a18f10 | 1773 | ret |= BDRV_BLOCK_OFFSET_VALID; |
c72080b9 | 1774 | *map = cluster_offset + index_in_cluster; |
4dd84ac9 HR |
1775 | if (extent->flat) { |
1776 | ret |= BDRV_BLOCK_RECURSE; | |
1777 | } | |
4bc74be9 | 1778 | } |
e0f100f5 | 1779 | *file = extent->file->bs; |
4bc74be9 PB |
1780 | break; |
1781 | } | |
91b85bd3 | 1782 | |
c72080b9 EB |
1783 | n = extent->cluster_sectors * BDRV_SECTOR_SIZE - index_in_cluster; |
1784 | *pnum = MIN(n, bytes); | |
b3976d3c | 1785 | return ret; |
ea2384d3 FB |
1786 | } |
1787 | ||
b4df9903 PB |
1788 | static int coroutine_fn |
1789 | vmdk_write_extent(VmdkExtent *extent, int64_t cluster_offset, | |
1790 | int64_t offset_in_cluster, QEMUIOVector *qiov, | |
1791 | uint64_t qiov_offset, uint64_t n_bytes, | |
1792 | uint64_t offset) | |
dd3f6ee2 FZ |
1793 | { |
1794 | int ret; | |
2b2c8c5d FZ |
1795 | VmdkGrainMarker *data = NULL; |
1796 | uLongf buf_len; | |
37b1d7d8 | 1797 | QEMUIOVector local_qiov; |
5e82a31e FZ |
1798 | int64_t write_offset; |
1799 | int64_t write_end_sector; | |
dd3f6ee2 | 1800 | |
2b2c8c5d | 1801 | if (extent->compressed) { |
37b1d7d8 KW |
1802 | void *compressed_data; |
1803 | ||
bedb8bb4 HR |
1804 | /* Only whole clusters */ |
1805 | if (offset_in_cluster || | |
1806 | n_bytes > (extent->cluster_sectors * SECTOR_SIZE) || | |
1807 | (n_bytes < (extent->cluster_sectors * SECTOR_SIZE) && | |
1808 | offset + n_bytes != extent->end_sector * SECTOR_SIZE)) | |
1809 | { | |
1810 | ret = -EINVAL; | |
1811 | goto out; | |
1812 | } | |
1813 | ||
2b2c8c5d FZ |
1814 | if (!extent->has_marker) { |
1815 | ret = -EINVAL; | |
1816 | goto out; | |
1817 | } | |
1818 | buf_len = (extent->cluster_sectors << 9) * 2; | |
1819 | data = g_malloc(buf_len + sizeof(VmdkGrainMarker)); | |
37b1d7d8 KW |
1820 | |
1821 | compressed_data = g_malloc(n_bytes); | |
1822 | qemu_iovec_to_buf(qiov, qiov_offset, compressed_data, n_bytes); | |
1823 | ret = compress(data->data, &buf_len, compressed_data, n_bytes); | |
1824 | g_free(compressed_data); | |
1825 | ||
1826 | if (ret != Z_OK || buf_len == 0) { | |
2b2c8c5d FZ |
1827 | ret = -EINVAL; |
1828 | goto out; | |
1829 | } | |
37b1d7d8 | 1830 | |
4545d4f4 QH |
1831 | data->lba = cpu_to_le64(offset >> BDRV_SECTOR_BITS); |
1832 | data->size = cpu_to_le32(buf_len); | |
37b1d7d8 KW |
1833 | |
1834 | n_bytes = buf_len + sizeof(VmdkGrainMarker); | |
199d95b0 | 1835 | qemu_iovec_init_buf(&local_qiov, data, n_bytes); |
23c4b2a8 HR |
1836 | |
1837 | BLKDBG_EVENT(extent->file, BLKDBG_WRITE_COMPRESSED); | |
37b1d7d8 KW |
1838 | } else { |
1839 | qemu_iovec_init(&local_qiov, qiov->niov); | |
1840 | qemu_iovec_concat(&local_qiov, qiov, qiov_offset, n_bytes); | |
23c4b2a8 HR |
1841 | |
1842 | BLKDBG_EVENT(extent->file, BLKDBG_WRITE_AIO); | |
2b2c8c5d | 1843 | } |
37b1d7d8 | 1844 | |
3c363575 | 1845 | write_offset = cluster_offset + offset_in_cluster; |
a03ef88f | 1846 | ret = bdrv_co_pwritev(extent->file, write_offset, n_bytes, |
37b1d7d8 | 1847 | &local_qiov, 0); |
5e82a31e | 1848 | |
37b1d7d8 | 1849 | write_end_sector = DIV_ROUND_UP(write_offset + n_bytes, BDRV_SECTOR_SIZE); |
5e82a31e | 1850 | |
3efffc32 RG |
1851 | if (extent->compressed) { |
1852 | extent->next_cluster_sector = write_end_sector; | |
1853 | } else { | |
1854 | extent->next_cluster_sector = MAX(extent->next_cluster_sector, | |
1855 | write_end_sector); | |
1856 | } | |
5e82a31e | 1857 | |
37b1d7d8 | 1858 | if (ret < 0) { |
dd3f6ee2 FZ |
1859 | goto out; |
1860 | } | |
1861 | ret = 0; | |
1862 | out: | |
2b2c8c5d | 1863 | g_free(data); |
37b1d7d8 KW |
1864 | if (!extent->compressed) { |
1865 | qemu_iovec_destroy(&local_qiov); | |
1866 | } | |
dd3f6ee2 FZ |
1867 | return ret; |
1868 | } | |
1869 | ||
b4df9903 PB |
1870 | static int coroutine_fn |
1871 | vmdk_read_extent(VmdkExtent *extent, int64_t cluster_offset, | |
1872 | int64_t offset_in_cluster, QEMUIOVector *qiov, | |
1873 | int bytes) | |
dd3f6ee2 FZ |
1874 | { |
1875 | int ret; | |
2b2c8c5d FZ |
1876 | int cluster_bytes, buf_bytes; |
1877 | uint8_t *cluster_buf, *compressed_data; | |
1878 | uint8_t *uncomp_buf; | |
1879 | uint32_t data_len; | |
1880 | VmdkGrainMarker *marker; | |
1881 | uLongf buf_len; | |
1882 | ||
dd3f6ee2 | 1883 | |
2b2c8c5d | 1884 | if (!extent->compressed) { |
23c4b2a8 | 1885 | BLKDBG_EVENT(extent->file, BLKDBG_READ_AIO); |
a03ef88f | 1886 | ret = bdrv_co_preadv(extent->file, |
f10cc243 KW |
1887 | cluster_offset + offset_in_cluster, bytes, |
1888 | qiov, 0); | |
1889 | if (ret < 0) { | |
1890 | return ret; | |
2b2c8c5d | 1891 | } |
f10cc243 | 1892 | return 0; |
2b2c8c5d FZ |
1893 | } |
1894 | cluster_bytes = extent->cluster_sectors * 512; | |
1895 | /* Read two clusters in case GrainMarker + compressed data > one cluster */ | |
1896 | buf_bytes = cluster_bytes * 2; | |
1897 | cluster_buf = g_malloc(buf_bytes); | |
1898 | uncomp_buf = g_malloc(cluster_bytes); | |
23c4b2a8 | 1899 | BLKDBG_EVENT(extent->file, BLKDBG_READ_COMPRESSED); |
a5c4e5be AF |
1900 | ret = bdrv_co_pread(extent->file, cluster_offset, buf_bytes, cluster_buf, |
1901 | 0); | |
2b2c8c5d FZ |
1902 | if (ret < 0) { |
1903 | goto out; | |
1904 | } | |
1905 | compressed_data = cluster_buf; | |
1906 | buf_len = cluster_bytes; | |
1907 | data_len = cluster_bytes; | |
1908 | if (extent->has_marker) { | |
1909 | marker = (VmdkGrainMarker *)cluster_buf; | |
1910 | compressed_data = marker->data; | |
1911 | data_len = le32_to_cpu(marker->size); | |
1912 | } | |
1913 | if (!data_len || data_len > buf_bytes) { | |
1914 | ret = -EINVAL; | |
1915 | goto out; | |
1916 | } | |
1917 | ret = uncompress(uncomp_buf, &buf_len, compressed_data, data_len); | |
1918 | if (ret != Z_OK) { | |
1919 | ret = -EINVAL; | |
1920 | goto out; | |
1921 | ||
1922 | } | |
1923 | if (offset_in_cluster < 0 || | |
f10cc243 | 1924 | offset_in_cluster + bytes > buf_len) { |
2b2c8c5d FZ |
1925 | ret = -EINVAL; |
1926 | goto out; | |
dd3f6ee2 | 1927 | } |
f10cc243 | 1928 | qemu_iovec_from_buf(qiov, 0, uncomp_buf + offset_in_cluster, bytes); |
2b2c8c5d FZ |
1929 | ret = 0; |
1930 | ||
1931 | out: | |
1932 | g_free(uncomp_buf); | |
1933 | g_free(cluster_buf); | |
1934 | return ret; | |
dd3f6ee2 FZ |
1935 | } |
1936 | ||
f10cc243 | 1937 | static int coroutine_fn |
f7ef38dd VSO |
1938 | vmdk_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes, |
1939 | QEMUIOVector *qiov, BdrvRequestFlags flags) | |
ea2384d3 FB |
1940 | { |
1941 | BDRVVmdkState *s = bs->opaque; | |
b3976d3c | 1942 | int ret; |
f10cc243 | 1943 | uint64_t n_bytes, offset_in_cluster; |
b3976d3c | 1944 | VmdkExtent *extent = NULL; |
f10cc243 | 1945 | QEMUIOVector local_qiov; |
ea2384d3 | 1946 | uint64_t cluster_offset; |
f10cc243 | 1947 | uint64_t bytes_done = 0; |
5f4da8c0 | 1948 | |
f10cc243 KW |
1949 | qemu_iovec_init(&local_qiov, qiov->niov); |
1950 | qemu_co_mutex_lock(&s->lock); | |
1951 | ||
1952 | while (bytes > 0) { | |
1953 | extent = find_extent(s, offset >> BDRV_SECTOR_BITS, extent); | |
b3976d3c | 1954 | if (!extent) { |
f10cc243 KW |
1955 | ret = -EIO; |
1956 | goto fail; | |
b3976d3c | 1957 | } |
c6ac36e1 | 1958 | ret = get_cluster_offset(bs, extent, NULL, |
f10cc243 KW |
1959 | offset, false, &cluster_offset, 0, 0); |
1960 | offset_in_cluster = vmdk_find_offset_in_cluster(extent, offset); | |
1961 | ||
1962 | n_bytes = MIN(bytes, extent->cluster_sectors * BDRV_SECTOR_SIZE | |
1963 | - offset_in_cluster); | |
1964 | ||
14ead646 | 1965 | if (ret != VMDK_OK) { |
91b85bd3 | 1966 | /* if not allocated, try to read from parent image, if exist */ |
760e0063 | 1967 | if (bs->backing && ret != VMDK_ZEROED) { |
ae261c86 | 1968 | if (!vmdk_is_cid_valid(bs)) { |
f10cc243 KW |
1969 | ret = -EINVAL; |
1970 | goto fail; | |
ae261c86 | 1971 | } |
f10cc243 KW |
1972 | |
1973 | qemu_iovec_reset(&local_qiov); | |
1974 | qemu_iovec_concat(&local_qiov, qiov, bytes_done, n_bytes); | |
1975 | ||
23c4b2a8 HR |
1976 | /* qcow2 emits this on bs->file instead of bs->backing */ |
1977 | BLKDBG_EVENT(bs->file, BLKDBG_READ_BACKING_AIO); | |
a03ef88f | 1978 | ret = bdrv_co_preadv(bs->backing, offset, n_bytes, |
f10cc243 | 1979 | &local_qiov, 0); |
ae261c86 | 1980 | if (ret < 0) { |
f10cc243 | 1981 | goto fail; |
ae261c86 | 1982 | } |
5f4da8c0 | 1983 | } else { |
f10cc243 | 1984 | qemu_iovec_memset(qiov, bytes_done, 0, n_bytes); |
5f4da8c0 | 1985 | } |
ea2384d3 | 1986 | } else { |
f10cc243 KW |
1987 | qemu_iovec_reset(&local_qiov); |
1988 | qemu_iovec_concat(&local_qiov, qiov, bytes_done, n_bytes); | |
1989 | ||
1990 | ret = vmdk_read_extent(extent, cluster_offset, offset_in_cluster, | |
1991 | &local_qiov, n_bytes); | |
dd3f6ee2 | 1992 | if (ret) { |
f10cc243 | 1993 | goto fail; |
7fa60fa3 | 1994 | } |
ea2384d3 | 1995 | } |
f10cc243 KW |
1996 | bytes -= n_bytes; |
1997 | offset += n_bytes; | |
1998 | bytes_done += n_bytes; | |
ea2384d3 | 1999 | } |
ea2384d3 | 2000 | |
f10cc243 KW |
2001 | ret = 0; |
2002 | fail: | |
2914caa0 | 2003 | qemu_co_mutex_unlock(&s->lock); |
f10cc243 KW |
2004 | qemu_iovec_destroy(&local_qiov); |
2005 | ||
2914caa0 PB |
2006 | return ret; |
2007 | } | |
2008 | ||
cdeaf1f1 FZ |
2009 | /** |
2010 | * vmdk_write: | |
2011 | * @zeroed: buf is ignored (data is zero), use zeroed_grain GTE feature | |
8e507243 FZ |
2012 | * if possible, otherwise return -ENOTSUP. |
2013 | * @zero_dry_run: used for zeroed == true only, don't update L2 table, just try | |
2014 | * with each cluster. By dry run we can find if the zero write | |
2015 | * is possible without modifying image data. | |
cdeaf1f1 FZ |
2016 | * |
2017 | * Returns: error code with 0 for success. | |
2018 | */ | |
b4df9903 PB |
2019 | static int coroutine_fn vmdk_pwritev(BlockDriverState *bs, uint64_t offset, |
2020 | uint64_t bytes, QEMUIOVector *qiov, | |
2021 | bool zeroed, bool zero_dry_run) | |
ea2384d3 | 2022 | { |
ff1afc72 | 2023 | BDRVVmdkState *s = bs->opaque; |
b3976d3c | 2024 | VmdkExtent *extent = NULL; |
585ea0c8 | 2025 | int ret; |
37b1d7d8 | 2026 | int64_t offset_in_cluster, n_bytes; |
ff1afc72 | 2027 | uint64_t cluster_offset; |
37b1d7d8 | 2028 | uint64_t bytes_done = 0; |
b3976d3c | 2029 | VmdkMetaData m_data; |
ff1afc72 | 2030 | |
37b1d7d8 KW |
2031 | if (DIV_ROUND_UP(offset, BDRV_SECTOR_SIZE) > bs->total_sectors) { |
2032 | error_report("Wrong offset: offset=0x%" PRIx64 | |
9af9e0fe | 2033 | " total_sectors=0x%" PRIx64, |
37b1d7d8 | 2034 | offset, bs->total_sectors); |
7fa60fa3 | 2035 | return -EIO; |
630530a6 TS |
2036 | } |
2037 | ||
37b1d7d8 KW |
2038 | while (bytes > 0) { |
2039 | extent = find_extent(s, offset >> BDRV_SECTOR_BITS, extent); | |
b3976d3c FZ |
2040 | if (!extent) { |
2041 | return -EIO; | |
2042 | } | |
98eb9733 SE |
2043 | if (extent->sesparse) { |
2044 | return -ENOTSUP; | |
2045 | } | |
37b1d7d8 KW |
2046 | offset_in_cluster = vmdk_find_offset_in_cluster(extent, offset); |
2047 | n_bytes = MIN(bytes, extent->cluster_sectors * BDRV_SECTOR_SIZE | |
2048 | - offset_in_cluster); | |
2049 | ||
2050 | ret = get_cluster_offset(bs, extent, &m_data, offset, | |
c6ac36e1 | 2051 | !(extent->compressed || zeroed), |
37b1d7d8 KW |
2052 | &cluster_offset, offset_in_cluster, |
2053 | offset_in_cluster + n_bytes); | |
2b2c8c5d | 2054 | if (extent->compressed) { |
65f74725 | 2055 | if (ret == VMDK_OK) { |
2b2c8c5d | 2056 | /* Refuse write to allocated cluster for streamOptimized */ |
4823970b FZ |
2057 | error_report("Could not write to allocated cluster" |
2058 | " for streamOptimized"); | |
2b2c8c5d | 2059 | return -EIO; |
2821c1cc | 2060 | } else if (!zeroed) { |
2b2c8c5d | 2061 | /* allocate */ |
37b1d7d8 | 2062 | ret = get_cluster_offset(bs, extent, &m_data, offset, |
c6ac36e1 | 2063 | true, &cluster_offset, 0, 0); |
2b2c8c5d FZ |
2064 | } |
2065 | } | |
cdeaf1f1 | 2066 | if (ret == VMDK_ERROR) { |
91b85bd3 | 2067 | return -EINVAL; |
b3976d3c | 2068 | } |
cdeaf1f1 FZ |
2069 | if (zeroed) { |
2070 | /* Do zeroed write, buf is ignored */ | |
2071 | if (extent->has_zero_grain && | |
37b1d7d8 KW |
2072 | offset_in_cluster == 0 && |
2073 | n_bytes >= extent->cluster_sectors * BDRV_SECTOR_SIZE) { | |
2074 | n_bytes = extent->cluster_sectors * BDRV_SECTOR_SIZE; | |
78cae78d | 2075 | if (!zero_dry_run && ret != VMDK_ZEROED) { |
cdeaf1f1 | 2076 | /* update L2 tables */ |
c6ac36e1 FZ |
2077 | if (vmdk_L2update(extent, &m_data, VMDK_GTE_ZEROED) |
2078 | != VMDK_OK) { | |
cdeaf1f1 FZ |
2079 | return -EIO; |
2080 | } | |
2081 | } | |
2082 | } else { | |
2083 | return -ENOTSUP; | |
2084 | } | |
2085 | } else { | |
37b1d7d8 KW |
2086 | ret = vmdk_write_extent(extent, cluster_offset, offset_in_cluster, |
2087 | qiov, bytes_done, n_bytes, offset); | |
cdeaf1f1 FZ |
2088 | if (ret) { |
2089 | return ret; | |
2090 | } | |
4dc20e64 | 2091 | if (m_data.new_allocation) { |
cdeaf1f1 | 2092 | /* update L2 tables */ |
c6ac36e1 FZ |
2093 | if (vmdk_L2update(extent, &m_data, |
2094 | cluster_offset >> BDRV_SECTOR_BITS) | |
2095 | != VMDK_OK) { | |
cdeaf1f1 FZ |
2096 | return -EIO; |
2097 | } | |
b3976d3c | 2098 | } |
630530a6 | 2099 | } |
37b1d7d8 KW |
2100 | bytes -= n_bytes; |
2101 | offset += n_bytes; | |
2102 | bytes_done += n_bytes; | |
5f4da8c0 | 2103 | |
ae261c86 FZ |
2104 | /* update CID on the first write every time the virtual disk is |
2105 | * opened */ | |
69b4d86d | 2106 | if (!s->cid_updated) { |
e5dc64b8 | 2107 | ret = vmdk_write_cid(bs, g_random_int()); |
99f1835d KW |
2108 | if (ret < 0) { |
2109 | return ret; | |
2110 | } | |
69b4d86d | 2111 | s->cid_updated = true; |
5f4da8c0 | 2112 | } |
ff1afc72 FB |
2113 | } |
2114 | return 0; | |
ea2384d3 FB |
2115 | } |
2116 | ||
37b1d7d8 | 2117 | static int coroutine_fn |
e75abeda VSO |
2118 | vmdk_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes, |
2119 | QEMUIOVector *qiov, BdrvRequestFlags flags) | |
e183ef75 PB |
2120 | { |
2121 | int ret; | |
2122 | BDRVVmdkState *s = bs->opaque; | |
2123 | qemu_co_mutex_lock(&s->lock); | |
37b1d7d8 | 2124 | ret = vmdk_pwritev(bs, offset, bytes, qiov, false, false); |
cdeaf1f1 FZ |
2125 | qemu_co_mutex_unlock(&s->lock); |
2126 | return ret; | |
2127 | } | |
2128 | ||
b2c622d3 | 2129 | static int coroutine_fn |
e75abeda VSO |
2130 | vmdk_co_pwritev_compressed(BlockDriverState *bs, int64_t offset, int64_t bytes, |
2131 | QEMUIOVector *qiov) | |
ba0ad89e | 2132 | { |
51b3c6b7 YCL |
2133 | if (bytes == 0) { |
2134 | /* The caller will write bytes 0 to signal EOF. | |
2135 | * When receive it, we align EOF to a sector boundary. */ | |
2136 | BDRVVmdkState *s = bs->opaque; | |
2137 | int i, ret; | |
2138 | int64_t length; | |
2139 | ||
2140 | for (i = 0; i < s->num_extents; i++) { | |
2141 | length = bdrv_getlength(s->extents[i].file->bs); | |
2142 | if (length < 0) { | |
2143 | return length; | |
2144 | } | |
2145 | length = QEMU_ALIGN_UP(length, BDRV_SECTOR_SIZE); | |
a5c4e5be AF |
2146 | ret = bdrv_co_truncate(s->extents[i].file, length, false, |
2147 | PREALLOC_MODE_OFF, 0, NULL); | |
51b3c6b7 YCL |
2148 | if (ret < 0) { |
2149 | return ret; | |
2150 | } | |
2151 | } | |
2152 | return 0; | |
2153 | } | |
b2c622d3 | 2154 | return vmdk_co_pwritev(bs, offset, bytes, qiov, 0); |
ba0ad89e FZ |
2155 | } |
2156 | ||
a620f2ae EB |
2157 | static int coroutine_fn vmdk_co_pwrite_zeroes(BlockDriverState *bs, |
2158 | int64_t offset, | |
f34b2bcf | 2159 | int64_t bytes, |
a620f2ae | 2160 | BdrvRequestFlags flags) |
cdeaf1f1 FZ |
2161 | { |
2162 | int ret; | |
2163 | BDRVVmdkState *s = bs->opaque; | |
37b1d7d8 | 2164 | |
cdeaf1f1 | 2165 | qemu_co_mutex_lock(&s->lock); |
8e507243 FZ |
2166 | /* write zeroes could fail if sectors not aligned to cluster, test it with |
2167 | * dry_run == true before really updating image */ | |
37b1d7d8 | 2168 | ret = vmdk_pwritev(bs, offset, bytes, NULL, true, true); |
cdeaf1f1 | 2169 | if (!ret) { |
37b1d7d8 | 2170 | ret = vmdk_pwritev(bs, offset, bytes, NULL, true, false); |
cdeaf1f1 | 2171 | } |
e183ef75 PB |
2172 | qemu_co_mutex_unlock(&s->lock); |
2173 | return ret; | |
2174 | } | |
2175 | ||
5be28490 FZ |
2176 | static int vmdk_init_extent(BlockBackend *blk, |
2177 | int64_t filesize, bool flat, | |
2178 | bool compress, bool zeroed_grain, | |
2179 | Error **errp) | |
8979b227 | 2180 | { |
f66fd6c3 | 2181 | int ret, i; |
8979b227 | 2182 | VMDK4Header header; |
917703c1 FZ |
2183 | uint32_t tmp, magic, grains, gd_sectors, gt_size, gt_count; |
2184 | uint32_t *gd_buf = NULL; | |
2185 | int gd_buf_size; | |
0e7e1989 | 2186 | |
f66fd6c3 | 2187 | if (flat) { |
8c6242b6 | 2188 | ret = blk_truncate(blk, filesize, false, PREALLOC_MODE_OFF, 0, errp); |
f66fd6c3 | 2189 | goto exit; |
5f4da8c0 | 2190 | } |
8979b227 FB |
2191 | magic = cpu_to_be32(VMDK4_MAGIC); |
2192 | memset(&header, 0, sizeof(header)); | |
d62d9dc4 FZ |
2193 | if (compress) { |
2194 | header.version = 3; | |
2195 | } else if (zeroed_grain) { | |
2196 | header.version = 2; | |
2197 | } else { | |
2198 | header.version = 1; | |
2199 | } | |
95b0aa42 | 2200 | header.flags = VMDK4_FLAG_RGD | VMDK4_FLAG_NL_DETECT |
69e0b6df FZ |
2201 | | (compress ? VMDK4_FLAG_COMPRESS | VMDK4_FLAG_MARKER : 0) |
2202 | | (zeroed_grain ? VMDK4_FLAG_ZERO_GRAIN : 0); | |
6c031aac | 2203 | header.compressAlgorithm = compress ? VMDK4_COMPRESSION_DEFLATE : 0; |
917703c1 | 2204 | header.capacity = filesize / BDRV_SECTOR_SIZE; |
16372ff0 | 2205 | header.granularity = 128; |
917703c1 | 2206 | header.num_gtes_per_gt = BDRV_SECTOR_SIZE; |
8979b227 | 2207 | |
917703c1 FZ |
2208 | grains = DIV_ROUND_UP(filesize / BDRV_SECTOR_SIZE, header.granularity); |
2209 | gt_size = DIV_ROUND_UP(header.num_gtes_per_gt * sizeof(uint32_t), | |
2210 | BDRV_SECTOR_SIZE); | |
2211 | gt_count = DIV_ROUND_UP(grains, header.num_gtes_per_gt); | |
2212 | gd_sectors = DIV_ROUND_UP(gt_count * sizeof(uint32_t), BDRV_SECTOR_SIZE); | |
8979b227 FB |
2213 | |
2214 | header.desc_offset = 1; | |
2215 | header.desc_size = 20; | |
2216 | header.rgd_offset = header.desc_offset + header.desc_size; | |
917703c1 | 2217 | header.gd_offset = header.rgd_offset + gd_sectors + (gt_size * gt_count); |
8979b227 | 2218 | header.grain_offset = |
917703c1 FZ |
2219 | ROUND_UP(header.gd_offset + gd_sectors + (gt_size * gt_count), |
2220 | header.granularity); | |
16372ff0 AG |
2221 | /* swap endianness for all header fields */ |
2222 | header.version = cpu_to_le32(header.version); | |
2223 | header.flags = cpu_to_le32(header.flags); | |
2224 | header.capacity = cpu_to_le64(header.capacity); | |
2225 | header.granularity = cpu_to_le64(header.granularity); | |
ca8804ce | 2226 | header.num_gtes_per_gt = cpu_to_le32(header.num_gtes_per_gt); |
8979b227 FB |
2227 | header.desc_offset = cpu_to_le64(header.desc_offset); |
2228 | header.desc_size = cpu_to_le64(header.desc_size); | |
2229 | header.rgd_offset = cpu_to_le64(header.rgd_offset); | |
2230 | header.gd_offset = cpu_to_le64(header.gd_offset); | |
2231 | header.grain_offset = cpu_to_le64(header.grain_offset); | |
6c031aac | 2232 | header.compressAlgorithm = cpu_to_le16(header.compressAlgorithm); |
8979b227 FB |
2233 | |
2234 | header.check_bytes[0] = 0xa; | |
2235 | header.check_bytes[1] = 0x20; | |
2236 | header.check_bytes[2] = 0xd; | |
2237 | header.check_bytes[3] = 0xa; | |
3b46e624 TS |
2238 | |
2239 | /* write all the data */ | |
a9262f55 | 2240 | ret = blk_pwrite(blk, 0, sizeof(magic), &magic, 0); |
917703c1 | 2241 | if (ret < 0) { |
c6bd8c70 | 2242 | error_setg(errp, QERR_IO_ERROR); |
1640366c KS |
2243 | goto exit; |
2244 | } | |
a9262f55 | 2245 | ret = blk_pwrite(blk, sizeof(magic), sizeof(header), &header, 0); |
917703c1 | 2246 | if (ret < 0) { |
c6bd8c70 | 2247 | error_setg(errp, QERR_IO_ERROR); |
1640366c KS |
2248 | goto exit; |
2249 | } | |
8979b227 | 2250 | |
c80d8b06 | 2251 | ret = blk_truncate(blk, le64_to_cpu(header.grain_offset) << 9, false, |
8c6242b6 | 2252 | PREALLOC_MODE_OFF, 0, errp); |
1640366c | 2253 | if (ret < 0) { |
1640366c KS |
2254 | goto exit; |
2255 | } | |
8979b227 FB |
2256 | |
2257 | /* write grain directory */ | |
917703c1 FZ |
2258 | gd_buf_size = gd_sectors * BDRV_SECTOR_SIZE; |
2259 | gd_buf = g_malloc0(gd_buf_size); | |
2260 | for (i = 0, tmp = le64_to_cpu(header.rgd_offset) + gd_sectors; | |
1640366c | 2261 | i < gt_count; i++, tmp += gt_size) { |
917703c1 FZ |
2262 | gd_buf[i] = cpu_to_le32(tmp); |
2263 | } | |
c4bea169 | 2264 | ret = blk_pwrite(blk, le64_to_cpu(header.rgd_offset) * BDRV_SECTOR_SIZE, |
a9262f55 | 2265 | gd_buf_size, gd_buf, 0); |
917703c1 | 2266 | if (ret < 0) { |
c6bd8c70 | 2267 | error_setg(errp, QERR_IO_ERROR); |
917703c1 | 2268 | goto exit; |
1640366c | 2269 | } |
3b46e624 | 2270 | |
8979b227 | 2271 | /* write backup grain directory */ |
917703c1 | 2272 | for (i = 0, tmp = le64_to_cpu(header.gd_offset) + gd_sectors; |
1640366c | 2273 | i < gt_count; i++, tmp += gt_size) { |
917703c1 FZ |
2274 | gd_buf[i] = cpu_to_le32(tmp); |
2275 | } | |
c4bea169 | 2276 | ret = blk_pwrite(blk, le64_to_cpu(header.gd_offset) * BDRV_SECTOR_SIZE, |
a9262f55 | 2277 | gd_buf_size, gd_buf, 0); |
917703c1 | 2278 | if (ret < 0) { |
c6bd8c70 | 2279 | error_setg(errp, QERR_IO_ERROR); |
1640366c | 2280 | } |
8979b227 | 2281 | |
f66fd6c3 | 2282 | ret = 0; |
5be28490 FZ |
2283 | exit: |
2284 | g_free(gd_buf); | |
2285 | return ret; | |
2286 | } | |
2287 | ||
f7f93a47 EGE |
2288 | static int coroutine_fn vmdk_create_extent(const char *filename, |
2289 | int64_t filesize, bool flat, | |
2290 | bool compress, bool zeroed_grain, | |
2291 | BlockBackend **pbb, | |
2292 | QemuOpts *opts, Error **errp) | |
5be28490 FZ |
2293 | { |
2294 | int ret; | |
2295 | BlockBackend *blk = NULL; | |
5be28490 | 2296 | |
2475a0d0 | 2297 | ret = bdrv_co_create_file(filename, opts, errp); |
5be28490 | 2298 | if (ret < 0) { |
5be28490 FZ |
2299 | goto exit; |
2300 | } | |
2301 | ||
2302 | blk = blk_new_open(filename, NULL, NULL, | |
2303 | BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL, | |
af175e85 | 2304 | errp); |
5be28490 | 2305 | if (blk == NULL) { |
5be28490 FZ |
2306 | ret = -EIO; |
2307 | goto exit; | |
2308 | } | |
2309 | ||
2310 | blk_set_allow_write_beyond_eof(blk, true); | |
2311 | ||
2312 | ret = vmdk_init_extent(blk, filesize, flat, compress, zeroed_grain, errp); | |
917703c1 | 2313 | exit: |
c4bea169 | 2314 | if (blk) { |
5be28490 FZ |
2315 | if (pbb) { |
2316 | *pbb = blk; | |
2317 | } else { | |
2318 | blk_unref(blk); | |
2319 | blk = NULL; | |
2320 | } | |
917703c1 | 2321 | } |
f66fd6c3 FZ |
2322 | return ret; |
2323 | } | |
2324 | ||
2325 | static int filename_decompose(const char *filename, char *path, char *prefix, | |
4823970b | 2326 | char *postfix, size_t buf_len, Error **errp) |
f66fd6c3 FZ |
2327 | { |
2328 | const char *p, *q; | |
2329 | ||
2330 | if (filename == NULL || !strlen(filename)) { | |
4823970b | 2331 | error_setg(errp, "No filename provided"); |
65f74725 | 2332 | return VMDK_ERROR; |
f66fd6c3 FZ |
2333 | } |
2334 | p = strrchr(filename, '/'); | |
2335 | if (p == NULL) { | |
2336 | p = strrchr(filename, '\\'); | |
2337 | } | |
2338 | if (p == NULL) { | |
2339 | p = strrchr(filename, ':'); | |
2340 | } | |
2341 | if (p != NULL) { | |
2342 | p++; | |
2343 | if (p - filename >= buf_len) { | |
65f74725 | 2344 | return VMDK_ERROR; |
f66fd6c3 FZ |
2345 | } |
2346 | pstrcpy(path, p - filename + 1, filename); | |
2347 | } else { | |
2348 | p = filename; | |
2349 | path[0] = '\0'; | |
2350 | } | |
2351 | q = strrchr(p, '.'); | |
2352 | if (q == NULL) { | |
2353 | pstrcpy(prefix, buf_len, p); | |
2354 | postfix[0] = '\0'; | |
2355 | } else { | |
2356 | if (q - p >= buf_len) { | |
65f74725 | 2357 | return VMDK_ERROR; |
f66fd6c3 FZ |
2358 | } |
2359 | pstrcpy(prefix, q - p + 1, p); | |
2360 | pstrcpy(postfix, buf_len, q); | |
2361 | } | |
65f74725 | 2362 | return VMDK_OK; |
f66fd6c3 FZ |
2363 | } |
2364 | ||
3015372d FZ |
2365 | /* |
2366 | * idx == 0: get or create the descriptor file (also the image file if in a | |
2367 | * non-split format. | |
2368 | * idx >= 1: get the n-th extent if in a split subformat | |
2369 | */ | |
f7f93a47 EGE |
2370 | typedef BlockBackend * coroutine_fn (*vmdk_create_extent_fn)(int64_t size, |
2371 | int idx, | |
2372 | bool flat, | |
2373 | bool split, | |
2374 | bool compress, | |
2375 | bool zeroed_grain, | |
2376 | void *opaque, | |
2377 | Error **errp); | |
3015372d FZ |
2378 | |
2379 | static void vmdk_desc_add_extent(GString *desc, | |
2380 | const char *extent_line_fmt, | |
2381 | int64_t size, const char *filename) | |
2382 | { | |
2383 | char *basename = g_path_get_basename(filename); | |
2384 | ||
2385 | g_string_append_printf(desc, extent_line_fmt, | |
2386 | DIV_ROUND_UP(size, BDRV_SECTOR_SIZE), basename); | |
2387 | g_free(basename); | |
2388 | } | |
2389 | ||
2390 | static int coroutine_fn vmdk_co_do_create(int64_t size, | |
2391 | BlockdevVmdkSubformat subformat, | |
2392 | BlockdevVmdkAdapterType adapter_type, | |
2393 | const char *backing_file, | |
2394 | const char *hw_version, | |
f3d43dfd | 2395 | const char *toolsversion, |
3015372d FZ |
2396 | bool compat6, |
2397 | bool zeroed_grain, | |
2398 | vmdk_create_extent_fn extent_fn, | |
2399 | void *opaque, | |
2400 | Error **errp) | |
f66fd6c3 | 2401 | { |
3015372d FZ |
2402 | int extent_idx; |
2403 | BlockBackend *blk = NULL; | |
4a960ece | 2404 | BlockBackend *extent_blk; |
c13959c7 | 2405 | Error *local_err = NULL; |
af057fe7 | 2406 | char *desc = NULL; |
f66fd6c3 | 2407 | int ret = 0; |
6c031aac | 2408 | bool flat, split, compress; |
af057fe7 | 2409 | GString *ext_desc_lines; |
f66fd6c3 | 2410 | const int64_t split_size = 0x80000000; /* VMDK has constant split size */ |
3015372d FZ |
2411 | int64_t extent_size; |
2412 | int64_t created_size = 0; | |
2413 | const char *extent_line_fmt; | |
fe206562 | 2414 | char *parent_desc_line = g_malloc0(BUF_SIZE); |
f66fd6c3 | 2415 | uint32_t parent_cid = 0xffffffff; |
7f2039f6 | 2416 | uint32_t number_heads = 16; |
917703c1 | 2417 | uint32_t desc_offset = 0, desc_len; |
f66fd6c3 FZ |
2418 | const char desc_template[] = |
2419 | "# Disk DescriptorFile\n" | |
2420 | "version=1\n" | |
9b17031a FZ |
2421 | "CID=%" PRIx32 "\n" |
2422 | "parentCID=%" PRIx32 "\n" | |
f66fd6c3 FZ |
2423 | "createType=\"%s\"\n" |
2424 | "%s" | |
2425 | "\n" | |
2426 | "# Extent description\n" | |
2427 | "%s" | |
2428 | "\n" | |
2429 | "# The Disk Data Base\n" | |
2430 | "#DDB\n" | |
2431 | "\n" | |
f249924e | 2432 | "ddb.virtualHWVersion = \"%s\"\n" |
f66fd6c3 | 2433 | "ddb.geometry.cylinders = \"%" PRId64 "\"\n" |
4ab9dab5 | 2434 | "ddb.geometry.heads = \"%" PRIu32 "\"\n" |
f66fd6c3 | 2435 | "ddb.geometry.sectors = \"63\"\n" |
f3d43dfd TW |
2436 | "ddb.adapterType = \"%s\"\n" |
2437 | "ddb.toolsVersion = \"%s\"\n"; | |
f66fd6c3 | 2438 | |
af057fe7 FZ |
2439 | ext_desc_lines = g_string_new(NULL); |
2440 | ||
f66fd6c3 | 2441 | /* Read out options */ |
3015372d FZ |
2442 | if (compat6) { |
2443 | if (hw_version) { | |
f249924e JK |
2444 | error_setg(errp, |
2445 | "compat6 cannot be enabled with hwversion set"); | |
2446 | ret = -EINVAL; | |
2447 | goto exit; | |
2448 | } | |
3015372d | 2449 | hw_version = "6"; |
5820f1da | 2450 | } |
3015372d FZ |
2451 | if (!hw_version) { |
2452 | hw_version = "4"; | |
f66fd6c3 | 2453 | } |
f3d43dfd TW |
2454 | if (!toolsversion) { |
2455 | toolsversion = "2147483647"; | |
2456 | } | |
5820f1da | 2457 | |
3015372d | 2458 | if (adapter_type != BLOCKDEV_VMDK_ADAPTER_TYPE_IDE) { |
7f2039f6 OP |
2459 | /* that's the number of heads with which vmware operates when |
2460 | creating, exporting, etc. vmdk files with a non-ide adapter type */ | |
2461 | number_heads = 255; | |
2462 | } | |
3015372d FZ |
2463 | split = (subformat == BLOCKDEV_VMDK_SUBFORMAT_TWOGBMAXEXTENTFLAT) || |
2464 | (subformat == BLOCKDEV_VMDK_SUBFORMAT_TWOGBMAXEXTENTSPARSE); | |
2465 | flat = (subformat == BLOCKDEV_VMDK_SUBFORMAT_MONOLITHICFLAT) || | |
2466 | (subformat == BLOCKDEV_VMDK_SUBFORMAT_TWOGBMAXEXTENTFLAT); | |
2467 | compress = subformat == BLOCKDEV_VMDK_SUBFORMAT_STREAMOPTIMIZED; | |
2468 | ||
f66fd6c3 | 2469 | if (flat) { |
3015372d | 2470 | extent_line_fmt = "RW %" PRId64 " FLAT \"%s\" 0\n"; |
f66fd6c3 | 2471 | } else { |
3015372d | 2472 | extent_line_fmt = "RW %" PRId64 " SPARSE \"%s\"\n"; |
f66fd6c3 FZ |
2473 | } |
2474 | if (flat && backing_file) { | |
4823970b | 2475 | error_setg(errp, "Flat image can't have backing file"); |
af057fe7 FZ |
2476 | ret = -ENOTSUP; |
2477 | goto exit; | |
f66fd6c3 | 2478 | } |
52c8d629 FZ |
2479 | if (flat && zeroed_grain) { |
2480 | error_setg(errp, "Flat image can't enable zeroed grain"); | |
af057fe7 FZ |
2481 | ret = -ENOTSUP; |
2482 | goto exit; | |
52c8d629 | 2483 | } |
3015372d FZ |
2484 | |
2485 | /* Create extents */ | |
2486 | if (split) { | |
2487 | extent_size = split_size; | |
2488 | } else { | |
2489 | extent_size = size; | |
2490 | } | |
2491 | if (!split && !flat) { | |
2492 | created_size = extent_size; | |
2493 | } else { | |
2494 | created_size = 0; | |
2495 | } | |
2496 | /* Get the descriptor file BDS */ | |
2497 | blk = extent_fn(created_size, 0, flat, split, compress, zeroed_grain, | |
2498 | opaque, errp); | |
2499 | if (!blk) { | |
2500 | ret = -EIO; | |
2501 | goto exit; | |
2502 | } | |
2503 | if (!split && !flat) { | |
2504 | vmdk_desc_add_extent(ext_desc_lines, extent_line_fmt, created_size, | |
2505 | blk_bs(blk)->filename); | |
2506 | } | |
2507 | ||
f66fd6c3 | 2508 | if (backing_file) { |
3015372d | 2509 | BlockBackend *backing; |
645ae7d8 HR |
2510 | char *full_backing = |
2511 | bdrv_get_full_backing_filename_from_filename(blk_bs(blk)->filename, | |
2512 | backing_file, | |
2513 | &local_err); | |
1085daf9 | 2514 | if (local_err) { |
1085daf9 HR |
2515 | error_propagate(errp, local_err); |
2516 | ret = -ENOENT; | |
2517 | goto exit; | |
2518 | } | |
645ae7d8 | 2519 | assert(full_backing); |
c4bea169 | 2520 | |
3015372d FZ |
2521 | backing = blk_new_open(full_backing, NULL, NULL, |
2522 | BDRV_O_NO_BACKING, errp); | |
1085daf9 | 2523 | g_free(full_backing); |
3015372d | 2524 | if (backing == NULL) { |
c4bea169 | 2525 | ret = -EIO; |
af057fe7 | 2526 | goto exit; |
f66fd6c3 | 2527 | } |
3015372d FZ |
2528 | if (strcmp(blk_bs(backing)->drv->format_name, "vmdk")) { |
2529 | error_setg(errp, "Invalid backing file format: %s. Must be vmdk", | |
2530 | blk_bs(backing)->drv->format_name); | |
2531 | blk_unref(backing); | |
af057fe7 FZ |
2532 | ret = -EINVAL; |
2533 | goto exit; | |
f66fd6c3 | 2534 | } |
3015372d FZ |
2535 | ret = vmdk_read_cid(blk_bs(backing), 0, &parent_cid); |
2536 | blk_unref(backing); | |
9877860e | 2537 | if (ret) { |
3015372d | 2538 | error_setg(errp, "Failed to read parent CID"); |
9877860e PM |
2539 | goto exit; |
2540 | } | |
fe206562 | 2541 | snprintf(parent_desc_line, BUF_SIZE, |
8ed610a1 | 2542 | "parentFileNameHint=\"%s\"", backing_file); |
f66fd6c3 | 2543 | } |
3015372d FZ |
2544 | extent_idx = 1; |
2545 | while (created_size < size) { | |
3015372d FZ |
2546 | int64_t cur_size = MIN(size - created_size, extent_size); |
2547 | extent_blk = extent_fn(cur_size, extent_idx, flat, split, compress, | |
2548 | zeroed_grain, opaque, errp); | |
2549 | if (!extent_blk) { | |
af057fe7 FZ |
2550 | ret = -EINVAL; |
2551 | goto exit; | |
f66fd6c3 | 2552 | } |
3015372d FZ |
2553 | vmdk_desc_add_extent(ext_desc_lines, extent_line_fmt, cur_size, |
2554 | blk_bs(extent_blk)->filename); | |
2555 | created_size += cur_size; | |
2556 | extent_idx++; | |
2557 | blk_unref(extent_blk); | |
f66fd6c3 | 2558 | } |
4a960ece KW |
2559 | |
2560 | /* Check whether we got excess extents */ | |
2561 | extent_blk = extent_fn(-1, extent_idx, flat, split, compress, zeroed_grain, | |
2562 | opaque, NULL); | |
2563 | if (extent_blk) { | |
2564 | blk_unref(extent_blk); | |
2565 | error_setg(errp, "List of extents contains unused extents"); | |
2566 | ret = -EINVAL; | |
2567 | goto exit; | |
2568 | } | |
2569 | ||
f66fd6c3 | 2570 | /* generate descriptor file */ |
af057fe7 | 2571 | desc = g_strdup_printf(desc_template, |
e5dc64b8 | 2572 | g_random_int(), |
af057fe7 | 2573 | parent_cid, |
3015372d | 2574 | BlockdevVmdkSubformat_str(subformat), |
af057fe7 FZ |
2575 | parent_desc_line, |
2576 | ext_desc_lines->str, | |
f249924e | 2577 | hw_version, |
3015372d | 2578 | size / |
917703c1 | 2579 | (int64_t)(63 * number_heads * BDRV_SECTOR_SIZE), |
af057fe7 | 2580 | number_heads, |
f3d43dfd TW |
2581 | BlockdevVmdkAdapterType_str(adapter_type), |
2582 | toolsversion); | |
917703c1 FZ |
2583 | desc_len = strlen(desc); |
2584 | /* the descriptor offset = 0x200 */ | |
2585 | if (!split && !flat) { | |
2586 | desc_offset = 0x200; | |
3015372d FZ |
2587 | } |
2588 | ||
a5c4e5be | 2589 | ret = blk_co_pwrite(blk, desc_offset, desc_len, desc, 0); |
3015372d FZ |
2590 | if (ret < 0) { |
2591 | error_setg_errno(errp, -ret, "Could not write description"); | |
2592 | goto exit; | |
2593 | } | |
2594 | /* bdrv_pwrite write padding zeros to align to sector, we don't need that | |
2595 | * for description file */ | |
2596 | if (desc_offset == 0) { | |
a5c4e5be | 2597 | ret = blk_co_truncate(blk, desc_len, false, PREALLOC_MODE_OFF, 0, errp); |
917703c1 | 2598 | if (ret < 0) { |
917703c1 FZ |
2599 | goto exit; |
2600 | } | |
f66fd6c3 | 2601 | } |
3015372d FZ |
2602 | ret = 0; |
2603 | exit: | |
2604 | if (blk) { | |
2605 | blk_unref(blk); | |
2606 | } | |
2607 | g_free(desc); | |
2608 | g_free(parent_desc_line); | |
2609 | g_string_free(ext_desc_lines, true); | |
2610 | return ret; | |
2611 | } | |
c4bea169 | 2612 | |
3015372d FZ |
2613 | typedef struct { |
2614 | char *path; | |
2615 | char *prefix; | |
2616 | char *postfix; | |
2617 | QemuOpts *opts; | |
2618 | } VMDKCreateOptsData; | |
2619 | ||
f7f93a47 | 2620 | static BlockBackend * coroutine_fn vmdk_co_create_opts_cb(int64_t size, int idx, |
3015372d FZ |
2621 | bool flat, bool split, bool compress, |
2622 | bool zeroed_grain, void *opaque, | |
2623 | Error **errp) | |
2624 | { | |
2625 | BlockBackend *blk = NULL; | |
2626 | BlockDriverState *bs = NULL; | |
2627 | VMDKCreateOptsData *data = opaque; | |
2628 | char *ext_filename = NULL; | |
2629 | char *rel_filename = NULL; | |
2630 | ||
4a960ece KW |
2631 | /* We're done, don't create excess extents. */ |
2632 | if (size == -1) { | |
2633 | assert(errp == NULL); | |
2634 | return NULL; | |
2635 | } | |
2636 | ||
3015372d FZ |
2637 | if (idx == 0) { |
2638 | rel_filename = g_strdup_printf("%s%s", data->prefix, data->postfix); | |
2639 | } else if (split) { | |
2640 | rel_filename = g_strdup_printf("%s-%c%03d%s", | |
2641 | data->prefix, | |
2642 | flat ? 'f' : 's', idx, data->postfix); | |
2643 | } else { | |
2644 | assert(idx == 1); | |
2645 | rel_filename = g_strdup_printf("%s-flat%s", data->prefix, data->postfix); | |
2646 | } | |
2647 | ||
2648 | ext_filename = g_strdup_printf("%s%s", data->path, rel_filename); | |
2649 | g_free(rel_filename); | |
2650 | ||
2651 | if (vmdk_create_extent(ext_filename, size, | |
2652 | flat, compress, zeroed_grain, &blk, data->opts, | |
2653 | errp)) { | |
af057fe7 | 2654 | goto exit; |
f66fd6c3 | 2655 | } |
3015372d FZ |
2656 | bdrv_unref(bs); |
2657 | exit: | |
2658 | g_free(ext_filename); | |
2659 | return blk; | |
2660 | } | |
c4bea169 | 2661 | |
b92902df ML |
2662 | static int coroutine_fn vmdk_co_create_opts(BlockDriver *drv, |
2663 | const char *filename, | |
2664 | QemuOpts *opts, | |
3015372d FZ |
2665 | Error **errp) |
2666 | { | |
2667 | Error *local_err = NULL; | |
2668 | char *desc = NULL; | |
2669 | int64_t total_size = 0; | |
2670 | char *adapter_type = NULL; | |
2671 | BlockdevVmdkAdapterType adapter_type_enum; | |
2672 | char *backing_file = NULL; | |
2673 | char *hw_version = NULL; | |
f3d43dfd | 2674 | char *toolsversion = NULL; |
3015372d FZ |
2675 | char *fmt = NULL; |
2676 | BlockdevVmdkSubformat subformat; | |
2677 | int ret = 0; | |
2678 | char *path = g_malloc0(PATH_MAX); | |
2679 | char *prefix = g_malloc0(PATH_MAX); | |
2680 | char *postfix = g_malloc0(PATH_MAX); | |
2681 | char *desc_line = g_malloc0(BUF_SIZE); | |
2682 | char *ext_filename = g_malloc0(PATH_MAX); | |
2683 | char *desc_filename = g_malloc0(PATH_MAX); | |
2684 | char *parent_desc_line = g_malloc0(BUF_SIZE); | |
2685 | bool zeroed_grain; | |
2686 | bool compat6; | |
2687 | VMDKCreateOptsData data; | |
d51a814c EB |
2688 | char *backing_fmt = NULL; |
2689 | ||
2690 | backing_fmt = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FMT); | |
2691 | if (backing_fmt && strcmp(backing_fmt, "vmdk") != 0) { | |
2692 | error_setg(errp, "backing_file must be a vmdk image"); | |
2693 | ret = -EINVAL; | |
2694 | goto exit; | |
2695 | } | |
c4bea169 | 2696 | |
3015372d FZ |
2697 | if (filename_decompose(filename, path, prefix, postfix, PATH_MAX, errp)) { |
2698 | ret = -EINVAL; | |
917703c1 | 2699 | goto exit; |
f66fd6c3 | 2700 | } |
3015372d FZ |
2701 | /* Read out options */ |
2702 | total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), | |
2703 | BDRV_SECTOR_SIZE); | |
2704 | adapter_type = qemu_opt_get_del(opts, BLOCK_OPT_ADAPTER_TYPE); | |
2705 | backing_file = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FILE); | |
2706 | hw_version = qemu_opt_get_del(opts, BLOCK_OPT_HWVERSION); | |
f3d43dfd | 2707 | toolsversion = qemu_opt_get_del(opts, BLOCK_OPT_TOOLSVERSION); |
3015372d FZ |
2708 | compat6 = qemu_opt_get_bool_del(opts, BLOCK_OPT_COMPAT6, false); |
2709 | if (strcmp(hw_version, "undefined") == 0) { | |
2710 | g_free(hw_version); | |
26c9296c | 2711 | hw_version = NULL; |
1640366c | 2712 | } |
3015372d FZ |
2713 | fmt = qemu_opt_get_del(opts, BLOCK_OPT_SUBFMT); |
2714 | zeroed_grain = qemu_opt_get_bool_del(opts, BLOCK_OPT_ZEROED_GRAIN, false); | |
2715 | ||
2716 | if (adapter_type) { | |
2717 | adapter_type_enum = qapi_enum_parse(&BlockdevVmdkAdapterType_lookup, | |
2718 | adapter_type, | |
2719 | BLOCKDEV_VMDK_ADAPTER_TYPE_IDE, | |
2720 | &local_err); | |
2721 | if (local_err) { | |
2722 | error_propagate(errp, local_err); | |
2723 | ret = -EINVAL; | |
2724 | goto exit; | |
2725 | } | |
2726 | } else { | |
2727 | adapter_type_enum = BLOCKDEV_VMDK_ADAPTER_TYPE_IDE; | |
917703c1 | 2728 | } |
3015372d FZ |
2729 | |
2730 | if (!fmt) { | |
2731 | /* Default format to monolithicSparse */ | |
2732 | subformat = BLOCKDEV_VMDK_SUBFORMAT_MONOLITHICSPARSE; | |
2733 | } else { | |
2734 | subformat = qapi_enum_parse(&BlockdevVmdkSubformat_lookup, | |
2735 | fmt, | |
2736 | BLOCKDEV_VMDK_SUBFORMAT_MONOLITHICSPARSE, | |
2737 | &local_err); | |
2738 | if (local_err) { | |
2739 | error_propagate(errp, local_err); | |
2740 | ret = -EINVAL; | |
2741 | goto exit; | |
2742 | } | |
2743 | } | |
2744 | data = (VMDKCreateOptsData){ | |
2745 | .prefix = prefix, | |
2746 | .postfix = postfix, | |
2747 | .path = path, | |
2748 | .opts = opts, | |
2749 | }; | |
2750 | ret = vmdk_co_do_create(total_size, subformat, adapter_type_enum, | |
f3d43dfd TW |
2751 | backing_file, hw_version, toolsversion, compat6, |
2752 | zeroed_grain, vmdk_co_create_opts_cb, &data, errp); | |
3015372d FZ |
2753 | |
2754 | exit: | |
d51a814c | 2755 | g_free(backing_fmt); |
5820f1da CL |
2756 | g_free(adapter_type); |
2757 | g_free(backing_file); | |
f249924e | 2758 | g_free(hw_version); |
f3d43dfd | 2759 | g_free(toolsversion); |
5820f1da | 2760 | g_free(fmt); |
af057fe7 | 2761 | g_free(desc); |
fe206562 JC |
2762 | g_free(path); |
2763 | g_free(prefix); | |
2764 | g_free(postfix); | |
2765 | g_free(desc_line); | |
2766 | g_free(ext_filename); | |
2767 | g_free(desc_filename); | |
2768 | g_free(parent_desc_line); | |
3015372d FZ |
2769 | return ret; |
2770 | } | |
2771 | ||
f7f93a47 EGE |
2772 | static BlockBackend * coroutine_fn vmdk_co_create_cb(int64_t size, int idx, |
2773 | bool flat, bool split, | |
2774 | bool compress, | |
2775 | bool zeroed_grain, | |
2776 | void *opaque, Error **errp) | |
3015372d FZ |
2777 | { |
2778 | int ret; | |
2779 | BlockDriverState *bs; | |
2780 | BlockBackend *blk; | |
2781 | BlockdevCreateOptionsVmdk *opts = opaque; | |
2782 | ||
2783 | if (idx == 0) { | |
2784 | bs = bdrv_open_blockdev_ref(opts->file, errp); | |
2785 | } else { | |
2786 | int i; | |
2787 | BlockdevRefList *list = opts->extents; | |
2788 | for (i = 1; i < idx; i++) { | |
2789 | if (!list || !list->next) { | |
2790 | error_setg(errp, "Extent [%d] not specified", i); | |
2791 | return NULL; | |
2792 | } | |
2793 | list = list->next; | |
2794 | } | |
2795 | if (!list) { | |
2796 | error_setg(errp, "Extent [%d] not specified", idx - 1); | |
2797 | return NULL; | |
2798 | } | |
2799 | bs = bdrv_open_blockdev_ref(list->value, errp); | |
2800 | } | |
2801 | if (!bs) { | |
2802 | return NULL; | |
2803 | } | |
a3aeeab5 EB |
2804 | blk = blk_new_with_bs(bs, |
2805 | BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE | BLK_PERM_RESIZE, | |
2806 | BLK_PERM_ALL, errp); | |
2807 | if (!blk) { | |
3015372d FZ |
2808 | return NULL; |
2809 | } | |
2810 | blk_set_allow_write_beyond_eof(blk, true); | |
2811 | bdrv_unref(bs); | |
2812 | ||
4a960ece KW |
2813 | if (size != -1) { |
2814 | ret = vmdk_init_extent(blk, size, flat, compress, zeroed_grain, errp); | |
2815 | if (ret) { | |
2816 | blk_unref(blk); | |
2817 | blk = NULL; | |
2818 | } | |
3015372d FZ |
2819 | } |
2820 | return blk; | |
2821 | } | |
2822 | ||
2823 | static int coroutine_fn vmdk_co_create(BlockdevCreateOptions *create_options, | |
2824 | Error **errp) | |
2825 | { | |
3015372d FZ |
2826 | BlockdevCreateOptionsVmdk *opts; |
2827 | ||
2828 | opts = &create_options->u.vmdk; | |
2829 | ||
2830 | /* Validate options */ | |
2831 | if (!QEMU_IS_ALIGNED(opts->size, BDRV_SECTOR_SIZE)) { | |
2832 | error_setg(errp, "Image size must be a multiple of 512 bytes"); | |
851fd4a0 | 2833 | return -EINVAL; |
3015372d FZ |
2834 | } |
2835 | ||
851fd4a0 MA |
2836 | return vmdk_co_do_create(opts->size, |
2837 | opts->subformat, | |
2838 | opts->adapter_type, | |
2839 | opts->backing_file, | |
2840 | opts->hwversion, | |
2841 | opts->toolsversion, | |
2842 | false, | |
2843 | opts->zeroed_grain, | |
2844 | vmdk_co_create_cb, | |
2845 | opts, errp); | |
8979b227 FB |
2846 | } |
2847 | ||
e2731add | 2848 | static void vmdk_close(BlockDriverState *bs) |
ea2384d3 | 2849 | { |
2bc3166c KW |
2850 | BDRVVmdkState *s = bs->opaque; |
2851 | ||
b3976d3c | 2852 | vmdk_free_extents(bs); |
f4c129a3 | 2853 | g_free(s->create_type); |
2bc3166c KW |
2854 | |
2855 | migrate_del_blocker(s->migration_blocker); | |
2856 | error_free(s->migration_blocker); | |
ea2384d3 FB |
2857 | } |
2858 | ||
4a1d5e1f FZ |
2859 | static int64_t vmdk_get_allocated_file_size(BlockDriverState *bs) |
2860 | { | |
2861 | int i; | |
2862 | int64_t ret = 0; | |
2863 | int64_t r; | |
2864 | BDRVVmdkState *s = bs->opaque; | |
2865 | ||
9a4f4c31 | 2866 | ret = bdrv_get_allocated_file_size(bs->file->bs); |
4a1d5e1f FZ |
2867 | if (ret < 0) { |
2868 | return ret; | |
2869 | } | |
2870 | for (i = 0; i < s->num_extents; i++) { | |
9a4f4c31 | 2871 | if (s->extents[i].file == bs->file) { |
4a1d5e1f FZ |
2872 | continue; |
2873 | } | |
24bc15d1 | 2874 | r = bdrv_get_allocated_file_size(s->extents[i].file->bs); |
4a1d5e1f FZ |
2875 | if (r < 0) { |
2876 | return r; | |
2877 | } | |
2878 | ret += r; | |
2879 | } | |
2880 | return ret; | |
2881 | } | |
0e7e1989 | 2882 | |
da7a50f9 FZ |
2883 | static int vmdk_has_zero_init(BlockDriverState *bs) |
2884 | { | |
2885 | int i; | |
2886 | BDRVVmdkState *s = bs->opaque; | |
2887 | ||
2888 | /* If has a flat extent and its underlying storage doesn't have zero init, | |
2889 | * return 0. */ | |
2890 | for (i = 0; i < s->num_extents; i++) { | |
2891 | if (s->extents[i].flat) { | |
24bc15d1 | 2892 | if (!bdrv_has_zero_init(s->extents[i].file->bs)) { |
da7a50f9 FZ |
2893 | return 0; |
2894 | } | |
2895 | } | |
2896 | } | |
2897 | return 1; | |
2898 | } | |
2899 | ||
f4c129a3 FZ |
2900 | static ImageInfo *vmdk_get_extent_info(VmdkExtent *extent) |
2901 | { | |
2902 | ImageInfo *info = g_new0(ImageInfo, 1); | |
2903 | ||
f30c66ba | 2904 | bdrv_refresh_filename(extent->file->bs); |
f4c129a3 | 2905 | *info = (ImageInfo){ |
24bc15d1 | 2906 | .filename = g_strdup(extent->file->bs->filename), |
f4c129a3 FZ |
2907 | .format = g_strdup(extent->type), |
2908 | .virtual_size = extent->sectors * BDRV_SECTOR_SIZE, | |
2909 | .compressed = extent->compressed, | |
2910 | .has_compressed = extent->compressed, | |
2911 | .cluster_size = extent->cluster_sectors * BDRV_SECTOR_SIZE, | |
2912 | .has_cluster_size = !extent->flat, | |
2913 | }; | |
2914 | ||
2915 | return info; | |
2916 | } | |
2917 | ||
2fd61638 PB |
2918 | static int coroutine_fn vmdk_co_check(BlockDriverState *bs, |
2919 | BdrvCheckResult *result, | |
2920 | BdrvCheckMode fix) | |
f43aa8e1 PL |
2921 | { |
2922 | BDRVVmdkState *s = bs->opaque; | |
2923 | VmdkExtent *extent = NULL; | |
2924 | int64_t sector_num = 0; | |
57322b78 | 2925 | int64_t total_sectors = bdrv_nb_sectors(bs); |
f43aa8e1 PL |
2926 | int ret; |
2927 | uint64_t cluster_offset; | |
2928 | ||
2929 | if (fix) { | |
2930 | return -ENOTSUP; | |
2931 | } | |
2932 | ||
2933 | for (;;) { | |
2934 | if (sector_num >= total_sectors) { | |
2935 | return 0; | |
2936 | } | |
2937 | extent = find_extent(s, sector_num, extent); | |
2938 | if (!extent) { | |
2939 | fprintf(stderr, | |
2940 | "ERROR: could not find extent for sector %" PRId64 "\n", | |
2941 | sector_num); | |
0e51b9b7 | 2942 | ret = -EINVAL; |
f43aa8e1 PL |
2943 | break; |
2944 | } | |
2945 | ret = get_cluster_offset(bs, extent, NULL, | |
2946 | sector_num << BDRV_SECTOR_BITS, | |
c6ac36e1 | 2947 | false, &cluster_offset, 0, 0); |
f43aa8e1 PL |
2948 | if (ret == VMDK_ERROR) { |
2949 | fprintf(stderr, | |
2950 | "ERROR: could not get cluster_offset for sector %" | |
2951 | PRId64 "\n", sector_num); | |
2952 | break; | |
2953 | } | |
0e51b9b7 FZ |
2954 | if (ret == VMDK_OK) { |
2955 | int64_t extent_len = bdrv_getlength(extent->file->bs); | |
2956 | if (extent_len < 0) { | |
2957 | fprintf(stderr, | |
2958 | "ERROR: could not get extent file length for sector %" | |
2959 | PRId64 "\n", sector_num); | |
2960 | ret = extent_len; | |
2961 | break; | |
2962 | } | |
2963 | if (cluster_offset >= extent_len) { | |
2964 | fprintf(stderr, | |
2965 | "ERROR: cluster offset for sector %" | |
2966 | PRId64 " points after EOF\n", sector_num); | |
2967 | ret = -EINVAL; | |
2968 | break; | |
2969 | } | |
f43aa8e1 PL |
2970 | } |
2971 | sector_num += extent->cluster_sectors; | |
2972 | } | |
2973 | ||
2974 | result->corruptions++; | |
0e51b9b7 | 2975 | return ret; |
f43aa8e1 PL |
2976 | } |
2977 | ||
1bf6e9ca AS |
2978 | static ImageInfoSpecific *vmdk_get_specific_info(BlockDriverState *bs, |
2979 | Error **errp) | |
f4c129a3 FZ |
2980 | { |
2981 | int i; | |
2982 | BDRVVmdkState *s = bs->opaque; | |
2983 | ImageInfoSpecific *spec_info = g_new0(ImageInfoSpecific, 1); | |
c3033fd3 | 2984 | ImageInfoList **tail; |
f4c129a3 FZ |
2985 | |
2986 | *spec_info = (ImageInfoSpecific){ | |
6a8f9661 | 2987 | .type = IMAGE_INFO_SPECIFIC_KIND_VMDK, |
32bafa8f EB |
2988 | .u = { |
2989 | .vmdk.data = g_new0(ImageInfoSpecificVmdk, 1), | |
f4c129a3 FZ |
2990 | }, |
2991 | }; | |
2992 | ||
32bafa8f | 2993 | *spec_info->u.vmdk.data = (ImageInfoSpecificVmdk) { |
f4c129a3 FZ |
2994 | .create_type = g_strdup(s->create_type), |
2995 | .cid = s->cid, | |
2996 | .parent_cid = s->parent_cid, | |
2997 | }; | |
2998 | ||
c3033fd3 | 2999 | tail = &spec_info->u.vmdk.data->extents; |
f4c129a3 | 3000 | for (i = 0; i < s->num_extents; i++) { |
c3033fd3 | 3001 | QAPI_LIST_APPEND(tail, vmdk_get_extent_info(&s->extents[i])); |
f4c129a3 FZ |
3002 | } |
3003 | ||
3004 | return spec_info; | |
3005 | } | |
3006 | ||
5f583307 FZ |
3007 | static bool vmdk_extents_type_eq(const VmdkExtent *a, const VmdkExtent *b) |
3008 | { | |
3009 | return a->flat == b->flat && | |
3010 | a->compressed == b->compressed && | |
3011 | (a->flat || a->cluster_sectors == b->cluster_sectors); | |
3012 | } | |
3013 | ||
74fe188c FZ |
3014 | static int vmdk_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) |
3015 | { | |
3016 | int i; | |
3017 | BDRVVmdkState *s = bs->opaque; | |
3018 | assert(s->num_extents); | |
5f583307 | 3019 | |
74fe188c FZ |
3020 | /* See if we have multiple extents but they have different cases */ |
3021 | for (i = 1; i < s->num_extents; i++) { | |
5f583307 | 3022 | if (!vmdk_extents_type_eq(&s->extents[0], &s->extents[i])) { |
74fe188c FZ |
3023 | return -ENOTSUP; |
3024 | } | |
3025 | } | |
5f583307 FZ |
3026 | bdi->needs_compressed_writes = s->extents[0].compressed; |
3027 | if (!s->extents[0].flat) { | |
3028 | bdi->cluster_size = s->extents[0].cluster_sectors << BDRV_SECTOR_BITS; | |
3029 | } | |
74fe188c FZ |
3030 | return 0; |
3031 | } | |
3032 | ||
abc521a9 HR |
3033 | static void vmdk_gather_child_options(BlockDriverState *bs, QDict *target, |
3034 | bool backing_overridden) | |
3035 | { | |
3036 | /* No children but file and backing can be explicitly specified (TODO) */ | |
3037 | qdict_put(target, "file", | |
3038 | qobject_ref(bs->file->bs->full_open_options)); | |
3039 | ||
3040 | if (backing_overridden) { | |
3041 | if (bs->backing) { | |
3042 | qdict_put(target, "backing", | |
3043 | qobject_ref(bs->backing->bs->full_open_options)); | |
3044 | } else { | |
3045 | qdict_put_null(target, "backing"); | |
3046 | } | |
3047 | } | |
3048 | } | |
3049 | ||
5820f1da CL |
3050 | static QemuOptsList vmdk_create_opts = { |
3051 | .name = "vmdk-create-opts", | |
3052 | .head = QTAILQ_HEAD_INITIALIZER(vmdk_create_opts.head), | |
3053 | .desc = { | |
3054 | { | |
3055 | .name = BLOCK_OPT_SIZE, | |
3056 | .type = QEMU_OPT_SIZE, | |
3057 | .help = "Virtual disk size" | |
3058 | }, | |
3059 | { | |
3060 | .name = BLOCK_OPT_ADAPTER_TYPE, | |
3061 | .type = QEMU_OPT_STRING, | |
3062 | .help = "Virtual adapter type, can be one of " | |
3063 | "ide (default), lsilogic, buslogic or legacyESX" | |
3064 | }, | |
3065 | { | |
3066 | .name = BLOCK_OPT_BACKING_FILE, | |
3067 | .type = QEMU_OPT_STRING, | |
3068 | .help = "File name of a base image" | |
3069 | }, | |
d51a814c EB |
3070 | { |
3071 | .name = BLOCK_OPT_BACKING_FMT, | |
3072 | .type = QEMU_OPT_STRING, | |
3073 | .help = "Must be 'vmdk' if present", | |
3074 | }, | |
5820f1da CL |
3075 | { |
3076 | .name = BLOCK_OPT_COMPAT6, | |
3077 | .type = QEMU_OPT_BOOL, | |
3078 | .help = "VMDK version 6 image", | |
3079 | .def_value_str = "off" | |
3080 | }, | |
f249924e JK |
3081 | { |
3082 | .name = BLOCK_OPT_HWVERSION, | |
3083 | .type = QEMU_OPT_STRING, | |
3084 | .help = "VMDK hardware version", | |
3085 | .def_value_str = "undefined" | |
3086 | }, | |
f3d43dfd TW |
3087 | { |
3088 | .name = BLOCK_OPT_TOOLSVERSION, | |
3089 | .type = QEMU_OPT_STRING, | |
3090 | .help = "VMware guest tools version", | |
3091 | }, | |
5820f1da CL |
3092 | { |
3093 | .name = BLOCK_OPT_SUBFMT, | |
3094 | .type = QEMU_OPT_STRING, | |
3095 | .help = | |
3096 | "VMDK flat extent format, can be one of " | |
3097 | "{monolithicSparse (default) | monolithicFlat | twoGbMaxExtentSparse | twoGbMaxExtentFlat | streamOptimized} " | |
3098 | }, | |
3099 | { | |
3100 | .name = BLOCK_OPT_ZEROED_GRAIN, | |
3101 | .type = QEMU_OPT_BOOL, | |
3102 | .help = "Enable efficient zero writes " | |
3103 | "using the zeroed-grain GTE feature" | |
3104 | }, | |
3105 | { /* end of list */ } | |
3106 | } | |
0e7e1989 KW |
3107 | }; |
3108 | ||
5efa9d5a | 3109 | static BlockDriver bdrv_vmdk = { |
da7a50f9 FZ |
3110 | .format_name = "vmdk", |
3111 | .instance_size = sizeof(BDRVVmdkState), | |
3112 | .bdrv_probe = vmdk_probe, | |
3113 | .bdrv_open = vmdk_open, | |
2fd61638 | 3114 | .bdrv_co_check = vmdk_co_check, |
da7a50f9 | 3115 | .bdrv_reopen_prepare = vmdk_reopen_prepare, |
6d17e287 HR |
3116 | .bdrv_reopen_commit = vmdk_reopen_commit, |
3117 | .bdrv_reopen_abort = vmdk_reopen_abort, | |
69dca43d | 3118 | .bdrv_child_perm = bdrv_default_perms, |
f10cc243 | 3119 | .bdrv_co_preadv = vmdk_co_preadv, |
37b1d7d8 | 3120 | .bdrv_co_pwritev = vmdk_co_pwritev, |
b2c622d3 | 3121 | .bdrv_co_pwritev_compressed = vmdk_co_pwritev_compressed, |
a620f2ae | 3122 | .bdrv_co_pwrite_zeroes = vmdk_co_pwrite_zeroes, |
da7a50f9 | 3123 | .bdrv_close = vmdk_close, |
efc75e2a | 3124 | .bdrv_co_create_opts = vmdk_co_create_opts, |
3015372d | 3125 | .bdrv_co_create = vmdk_co_create, |
c72080b9 | 3126 | .bdrv_co_block_status = vmdk_co_block_status, |
da7a50f9 FZ |
3127 | .bdrv_get_allocated_file_size = vmdk_get_allocated_file_size, |
3128 | .bdrv_has_zero_init = vmdk_has_zero_init, | |
f4c129a3 | 3129 | .bdrv_get_specific_info = vmdk_get_specific_info, |
d34682cd | 3130 | .bdrv_refresh_limits = vmdk_refresh_limits, |
74fe188c | 3131 | .bdrv_get_info = vmdk_get_info, |
abc521a9 | 3132 | .bdrv_gather_child_options = vmdk_gather_child_options, |
da7a50f9 | 3133 | |
d67066d8 | 3134 | .is_format = true, |
8ee79e70 | 3135 | .supports_backing = true, |
5820f1da | 3136 | .create_opts = &vmdk_create_opts, |
ea2384d3 | 3137 | }; |
5efa9d5a AL |
3138 | |
3139 | static void bdrv_vmdk_init(void) | |
3140 | { | |
3141 | bdrv_register(&bdrv_vmdk); | |
3142 | } | |
3143 | ||
3144 | block_init(bdrv_vmdk_init); |