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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 | 274 | |
32a8aba3 | 275 | bdrv_graph_wrlock(NULL); |
b3976d3c | 276 | for (i = 0; i < s->num_extents; i++) { |
b3c0bfb6 FZ |
277 | e = &s->extents[i]; |
278 | g_free(e->l1_table); | |
279 | g_free(e->l2_cache); | |
280 | g_free(e->l1_backup_table); | |
f4c129a3 | 281 | g_free(e->type); |
9a4f4c31 | 282 | if (e->file != bs->file) { |
24bc15d1 | 283 | bdrv_unref_child(bs, e->file); |
b3c0bfb6 | 284 | } |
b3976d3c | 285 | } |
32a8aba3 KW |
286 | bdrv_graph_wrunlock(); |
287 | ||
7267c094 | 288 | g_free(s->extents); |
b3976d3c FZ |
289 | } |
290 | ||
86c6b429 FZ |
291 | static void vmdk_free_last_extent(BlockDriverState *bs) |
292 | { | |
293 | BDRVVmdkState *s = bs->opaque; | |
294 | ||
295 | if (s->num_extents == 0) { | |
296 | return; | |
297 | } | |
298 | s->num_extents--; | |
5839e53b | 299 | s->extents = g_renew(VmdkExtent, s->extents, s->num_extents); |
86c6b429 FZ |
300 | } |
301 | ||
9877860e PM |
302 | /* Return -ve errno, or 0 on success and write CID into *pcid. */ |
303 | static int vmdk_read_cid(BlockDriverState *bs, int parent, uint32_t *pcid) | |
ea2384d3 | 304 | { |
5997c210 | 305 | char *desc; |
9877860e | 306 | uint32_t cid; |
7ccfb2eb | 307 | const char *p_name, *cid_str; |
5f4da8c0 | 308 | size_t cid_str_size; |
e1da9b24 | 309 | BDRVVmdkState *s = bs->opaque; |
99f1835d | 310 | int ret; |
5f4da8c0 | 311 | |
5997c210 | 312 | desc = g_malloc0(DESC_SIZE); |
32cc71de | 313 | ret = bdrv_pread(bs->file, s->desc_offset, DESC_SIZE, desc, 0); |
99f1835d | 314 | if (ret < 0) { |
9877860e | 315 | goto out; |
e1da9b24 | 316 | } |
5f4da8c0 TS |
317 | |
318 | if (parent) { | |
319 | cid_str = "parentCID"; | |
320 | cid_str_size = sizeof("parentCID"); | |
321 | } else { | |
322 | cid_str = "CID"; | |
323 | cid_str_size = sizeof("CID"); | |
324 | } | |
325 | ||
93897b9f | 326 | desc[DESC_SIZE - 1] = '\0'; |
ae261c86 | 327 | p_name = strstr(desc, cid_str); |
9877860e PM |
328 | if (p_name == NULL) { |
329 | ret = -EINVAL; | |
330 | goto out; | |
5f4da8c0 | 331 | } |
9877860e PM |
332 | p_name += cid_str_size; |
333 | if (sscanf(p_name, "%" SCNx32, &cid) != 1) { | |
334 | ret = -EINVAL; | |
335 | goto out; | |
336 | } | |
337 | *pcid = cid; | |
338 | ret = 0; | |
5f4da8c0 | 339 | |
9877860e | 340 | out: |
5997c210 | 341 | g_free(desc); |
9877860e | 342 | return ret; |
5f4da8c0 TS |
343 | } |
344 | ||
28944f99 PB |
345 | static int coroutine_fn GRAPH_RDLOCK |
346 | vmdk_write_cid(BlockDriverState *bs, uint32_t cid) | |
5f4da8c0 | 347 | { |
965415eb | 348 | char *desc, *tmp_desc; |
5f4da8c0 | 349 | char *p_name, *tmp_str; |
e1da9b24 | 350 | BDRVVmdkState *s = bs->opaque; |
965415eb | 351 | int ret = 0; |
5f4da8c0 | 352 | |
965415eb FZ |
353 | desc = g_malloc0(DESC_SIZE); |
354 | tmp_desc = g_malloc0(DESC_SIZE); | |
28944f99 | 355 | ret = bdrv_co_pread(bs->file, s->desc_offset, DESC_SIZE, desc, 0); |
99f1835d | 356 | if (ret < 0) { |
965415eb | 357 | goto out; |
e1da9b24 | 358 | } |
5f4da8c0 | 359 | |
93897b9f | 360 | desc[DESC_SIZE - 1] = '\0'; |
ae261c86 | 361 | tmp_str = strstr(desc, "parentCID"); |
93897b9f | 362 | if (tmp_str == NULL) { |
965415eb FZ |
363 | ret = -EINVAL; |
364 | goto out; | |
93897b9f KW |
365 | } |
366 | ||
965415eb | 367 | pstrcpy(tmp_desc, DESC_SIZE, tmp_str); |
ae261c86 FZ |
368 | p_name = strstr(desc, "CID"); |
369 | if (p_name != NULL) { | |
5f4da8c0 | 370 | p_name += sizeof("CID"); |
965415eb FZ |
371 | snprintf(p_name, DESC_SIZE - (p_name - desc), "%" PRIx32 "\n", cid); |
372 | pstrcat(desc, DESC_SIZE, tmp_desc); | |
5f4da8c0 TS |
373 | } |
374 | ||
28944f99 | 375 | ret = bdrv_co_pwrite_sync(bs->file, s->desc_offset, DESC_SIZE, desc, 0); |
99f1835d | 376 | |
965415eb FZ |
377 | out: |
378 | g_free(desc); | |
379 | g_free(tmp_desc); | |
380 | return ret; | |
5f4da8c0 TS |
381 | } |
382 | ||
5a5a9fdd | 383 | static int coroutine_fn vmdk_is_cid_valid(BlockDriverState *bs) |
5f4da8c0 | 384 | { |
5f4da8c0 | 385 | BDRVVmdkState *s = bs->opaque; |
5f4da8c0 TS |
386 | uint32_t cur_pcid; |
387 | ||
760e0063 KW |
388 | if (!s->cid_checked && bs->backing) { |
389 | BlockDriverState *p_bs = bs->backing->bs; | |
390 | ||
439e89fc HR |
391 | if (strcmp(p_bs->drv->format_name, "vmdk")) { |
392 | /* Backing file is not in vmdk format, so it does not have | |
393 | * a CID, which makes the overlay's parent CID invalid */ | |
394 | return 0; | |
395 | } | |
396 | ||
9877860e PM |
397 | if (vmdk_read_cid(p_bs, 0, &cur_pcid) != 0) { |
398 | /* read failure: report as not valid */ | |
399 | return 0; | |
400 | } | |
ae261c86 FZ |
401 | if (s->parent_cid != cur_pcid) { |
402 | /* CID not valid */ | |
5f4da8c0 | 403 | return 0; |
ae261c86 | 404 | } |
5f4da8c0 | 405 | } |
c338b6ad | 406 | s->cid_checked = true; |
ae261c86 | 407 | /* CID valid */ |
5f4da8c0 TS |
408 | return 1; |
409 | } | |
410 | ||
3897575f JC |
411 | static int vmdk_reopen_prepare(BDRVReopenState *state, |
412 | BlockReopenQueue *queue, Error **errp) | |
413 | { | |
6d17e287 HR |
414 | BDRVVmdkState *s; |
415 | BDRVVmdkReopenState *rs; | |
416 | int i; | |
417 | ||
3897575f JC |
418 | assert(state != NULL); |
419 | assert(state->bs != NULL); | |
6d17e287 HR |
420 | assert(state->opaque == NULL); |
421 | ||
422 | s = state->bs->opaque; | |
423 | ||
424 | rs = g_new0(BDRVVmdkReopenState, 1); | |
425 | state->opaque = rs; | |
426 | ||
427 | /* | |
428 | * Check whether there are any extents stored in bs->file; if bs->file | |
429 | * changes, we will need to update their .file pointers to follow suit | |
430 | */ | |
431 | rs->extents_using_bs_file = g_new(bool, s->num_extents); | |
432 | for (i = 0; i < s->num_extents; i++) { | |
433 | rs->extents_using_bs_file[i] = s->extents[i].file == state->bs->file; | |
434 | } | |
435 | ||
67251a31 | 436 | return 0; |
3897575f JC |
437 | } |
438 | ||
6d17e287 HR |
439 | static void vmdk_reopen_clean(BDRVReopenState *state) |
440 | { | |
441 | BDRVVmdkReopenState *rs = state->opaque; | |
442 | ||
443 | g_free(rs->extents_using_bs_file); | |
444 | g_free(rs); | |
445 | state->opaque = NULL; | |
446 | } | |
447 | ||
448 | static void vmdk_reopen_commit(BDRVReopenState *state) | |
449 | { | |
450 | BDRVVmdkState *s = state->bs->opaque; | |
451 | BDRVVmdkReopenState *rs = state->opaque; | |
452 | int i; | |
453 | ||
454 | for (i = 0; i < s->num_extents; i++) { | |
455 | if (rs->extents_using_bs_file[i]) { | |
456 | s->extents[i].file = state->bs->file; | |
457 | } | |
458 | } | |
459 | ||
460 | vmdk_reopen_clean(state); | |
461 | } | |
462 | ||
463 | static void vmdk_reopen_abort(BDRVReopenState *state) | |
464 | { | |
465 | vmdk_reopen_clean(state); | |
466 | } | |
467 | ||
9949f97e | 468 | static int vmdk_parent_open(BlockDriverState *bs) |
5f4da8c0 | 469 | { |
5fafdf24 | 470 | char *p_name; |
71968dbf | 471 | char *desc; |
e1da9b24 | 472 | BDRVVmdkState *s = bs->opaque; |
588b65a3 | 473 | int ret; |
5f4da8c0 | 474 | |
71968dbf | 475 | desc = g_malloc0(DESC_SIZE + 1); |
32cc71de | 476 | ret = bdrv_pread(bs->file, s->desc_offset, DESC_SIZE, desc, 0); |
588b65a3 | 477 | if (ret < 0) { |
71968dbf | 478 | goto out; |
e1da9b24 | 479 | } |
5f4da8c0 | 480 | |
ae261c86 FZ |
481 | p_name = strstr(desc, "parentFileNameHint"); |
482 | if (p_name != NULL) { | |
5f4da8c0 | 483 | char *end_name; |
5f4da8c0 TS |
484 | |
485 | p_name += sizeof("parentFileNameHint") + 1; | |
ae261c86 FZ |
486 | end_name = strchr(p_name, '\"'); |
487 | if (end_name == NULL) { | |
71968dbf FZ |
488 | ret = -EINVAL; |
489 | goto out; | |
ae261c86 | 490 | } |
998c2019 | 491 | if ((end_name - p_name) > sizeof(bs->auto_backing_file) - 1) { |
71968dbf FZ |
492 | ret = -EINVAL; |
493 | goto out; | |
ae261c86 | 494 | } |
3b46e624 | 495 | |
998c2019 HR |
496 | pstrcpy(bs->auto_backing_file, end_name - p_name + 1, p_name); |
497 | pstrcpy(bs->backing_file, sizeof(bs->backing_file), | |
498 | bs->auto_backing_file); | |
7502be83 SE |
499 | pstrcpy(bs->backing_format, sizeof(bs->backing_format), |
500 | "vmdk"); | |
ff1afc72 | 501 | } |
5f4da8c0 | 502 | |
71968dbf FZ |
503 | out: |
504 | g_free(desc); | |
505 | return ret; | |
5f4da8c0 TS |
506 | } |
507 | ||
b3976d3c FZ |
508 | /* Create and append extent to the extent array. Return the added VmdkExtent |
509 | * address. return NULL if allocation failed. */ | |
8aa1331c | 510 | static int vmdk_add_extent(BlockDriverState *bs, |
24bc15d1 | 511 | BdrvChild *file, bool flat, int64_t sectors, |
b3976d3c FZ |
512 | int64_t l1_offset, int64_t l1_backup_offset, |
513 | uint32_t l1_size, | |
8aa1331c | 514 | int l2_size, uint64_t cluster_sectors, |
4823970b FZ |
515 | VmdkExtent **new_extent, |
516 | Error **errp) | |
b3976d3c FZ |
517 | { |
518 | VmdkExtent *extent; | |
519 | BDRVVmdkState *s = bs->opaque; | |
0a156f7c | 520 | int64_t nb_sectors; |
b3976d3c | 521 | |
8aa1331c FZ |
522 | if (cluster_sectors > 0x200000) { |
523 | /* 0x200000 * 512Bytes = 1GB for one cluster is unrealistic */ | |
4823970b FZ |
524 | error_setg(errp, "Invalid granularity, image may be corrupt"); |
525 | return -EFBIG; | |
8aa1331c | 526 | } |
59d6ee48 | 527 | if (l1_size > 32 * 1024 * 1024) { |
940a2cd5 SE |
528 | /* |
529 | * Although with big capacity and small l1_entry_sectors, we can get a | |
b0651b8c | 530 | * big l1_size, we don't want unbounded value to allocate the table. |
59d6ee48 SE |
531 | * Limit it to 32M, which is enough to store: |
532 | * 8TB - for both VMDK3 & VMDK4 with | |
533 | * minimal cluster size: 512B | |
534 | * minimal L2 table size: 512 entries | |
535 | * 8 TB is still more than the maximal value supported for | |
536 | * VMDK3 & VMDK4 which is 2TB. | |
98eb9733 SE |
537 | * 64TB - for "ESXi seSparse Extent" |
538 | * minimal cluster size: 512B (default is 4KB) | |
539 | * L2 table size: 4096 entries (const). | |
540 | * 64TB is more than the maximal value supported for | |
541 | * seSparse VMDKs (which is slightly less than 64TB) | |
940a2cd5 | 542 | */ |
4823970b | 543 | error_setg(errp, "L1 size too big"); |
b0651b8c FZ |
544 | return -EFBIG; |
545 | } | |
8aa1331c | 546 | |
24bc15d1 | 547 | nb_sectors = bdrv_nb_sectors(file->bs); |
0a156f7c MA |
548 | if (nb_sectors < 0) { |
549 | return nb_sectors; | |
c6ac36e1 FZ |
550 | } |
551 | ||
5839e53b | 552 | s->extents = g_renew(VmdkExtent, s->extents, s->num_extents + 1); |
b3976d3c FZ |
553 | extent = &s->extents[s->num_extents]; |
554 | s->num_extents++; | |
555 | ||
556 | memset(extent, 0, sizeof(VmdkExtent)); | |
557 | extent->file = file; | |
558 | extent->flat = flat; | |
559 | extent->sectors = sectors; | |
560 | extent->l1_table_offset = l1_offset; | |
561 | extent->l1_backup_table_offset = l1_backup_offset; | |
562 | extent->l1_size = l1_size; | |
563 | extent->l1_entry_sectors = l2_size * cluster_sectors; | |
564 | extent->l2_size = l2_size; | |
301c7d38 | 565 | extent->cluster_sectors = flat ? sectors : cluster_sectors; |
0a156f7c | 566 | extent->next_cluster_sector = ROUND_UP(nb_sectors, cluster_sectors); |
98eb9733 | 567 | extent->entry_size = sizeof(uint32_t); |
b3976d3c FZ |
568 | |
569 | if (s->num_extents > 1) { | |
570 | extent->end_sector = (*(extent - 1)).end_sector + extent->sectors; | |
571 | } else { | |
572 | extent->end_sector = extent->sectors; | |
573 | } | |
574 | bs->total_sectors = extent->end_sector; | |
8aa1331c FZ |
575 | if (new_extent) { |
576 | *new_extent = extent; | |
577 | } | |
578 | return 0; | |
b3976d3c FZ |
579 | } |
580 | ||
b7cfc7d5 KW |
581 | static int GRAPH_RDLOCK |
582 | vmdk_init_tables(BlockDriverState *bs, VmdkExtent *extent, Error **errp) | |
5f4da8c0 | 583 | { |
b4b3ab14 | 584 | int ret; |
13c4941c FZ |
585 | size_t l1_size; |
586 | int i; | |
5f4da8c0 | 587 | |
ea2384d3 | 588 | /* read the L1 table */ |
98eb9733 | 589 | l1_size = extent->l1_size * extent->entry_size; |
d6e59931 KW |
590 | extent->l1_table = g_try_malloc(l1_size); |
591 | if (l1_size && extent->l1_table == NULL) { | |
592 | return -ENOMEM; | |
593 | } | |
594 | ||
32cc71de AF |
595 | ret = bdrv_pread(extent->file, extent->l1_table_offset, l1_size, |
596 | extent->l1_table, 0); | |
b4b3ab14 | 597 | if (ret < 0) { |
f30c66ba | 598 | bdrv_refresh_filename(extent->file->bs); |
4823970b FZ |
599 | error_setg_errno(errp, -ret, |
600 | "Could not read l1 table from extent '%s'", | |
24bc15d1 | 601 | extent->file->bs->filename); |
b4b3ab14 | 602 | goto fail_l1; |
b3976d3c FZ |
603 | } |
604 | for (i = 0; i < extent->l1_size; i++) { | |
98eb9733 SE |
605 | if (extent->entry_size == sizeof(uint64_t)) { |
606 | le64_to_cpus((uint64_t *)extent->l1_table + i); | |
607 | } else { | |
608 | assert(extent->entry_size == sizeof(uint32_t)); | |
609 | le32_to_cpus((uint32_t *)extent->l1_table + i); | |
610 | } | |
ea2384d3 FB |
611 | } |
612 | ||
b3976d3c | 613 | if (extent->l1_backup_table_offset) { |
98eb9733 | 614 | assert(!extent->sesparse); |
d6e59931 KW |
615 | extent->l1_backup_table = g_try_malloc(l1_size); |
616 | if (l1_size && extent->l1_backup_table == NULL) { | |
617 | ret = -ENOMEM; | |
618 | goto fail_l1; | |
619 | } | |
53fb7844 | 620 | ret = bdrv_pread(extent->file, extent->l1_backup_table_offset, |
32cc71de | 621 | l1_size, extent->l1_backup_table, 0); |
b4b3ab14 | 622 | if (ret < 0) { |
f30c66ba | 623 | bdrv_refresh_filename(extent->file->bs); |
4823970b FZ |
624 | error_setg_errno(errp, -ret, |
625 | "Could not read l1 backup table from extent '%s'", | |
24bc15d1 | 626 | extent->file->bs->filename); |
b4b3ab14 | 627 | goto fail_l1b; |
b3976d3c FZ |
628 | } |
629 | for (i = 0; i < extent->l1_size; i++) { | |
630 | le32_to_cpus(&extent->l1_backup_table[i]); | |
ff1afc72 FB |
631 | } |
632 | } | |
633 | ||
b3976d3c | 634 | extent->l2_cache = |
98eb9733 | 635 | g_malloc(extent->entry_size * extent->l2_size * L2_CACHE_SIZE); |
ea2384d3 | 636 | return 0; |
b4b3ab14 | 637 | fail_l1b: |
7267c094 | 638 | g_free(extent->l1_backup_table); |
b4b3ab14 | 639 | fail_l1: |
7267c094 | 640 | g_free(extent->l1_table); |
b4b3ab14 FZ |
641 | return ret; |
642 | } | |
643 | ||
b7cfc7d5 KW |
644 | static int GRAPH_RDLOCK |
645 | vmdk_open_vmfs_sparse(BlockDriverState *bs, BdrvChild *file, int flags, | |
646 | Error **errp) | |
b4b3ab14 FZ |
647 | { |
648 | int ret; | |
649 | uint32_t magic; | |
650 | VMDK3Header header; | |
cd466702 | 651 | VmdkExtent *extent = NULL; |
b4b3ab14 | 652 | |
32cc71de | 653 | ret = bdrv_pread(file, sizeof(magic), sizeof(header), &header, 0); |
b4b3ab14 | 654 | if (ret < 0) { |
f30c66ba | 655 | bdrv_refresh_filename(file->bs); |
4823970b FZ |
656 | error_setg_errno(errp, -ret, |
657 | "Could not read header from file '%s'", | |
24bc15d1 | 658 | file->bs->filename); |
86c6b429 | 659 | return ret; |
b4b3ab14 | 660 | } |
f6b61e54 FZ |
661 | ret = vmdk_add_extent(bs, file, false, |
662 | le32_to_cpu(header.disk_sectors), | |
7237aecd | 663 | (int64_t)le32_to_cpu(header.l1dir_offset) << 9, |
f6b61e54 FZ |
664 | 0, |
665 | le32_to_cpu(header.l1dir_size), | |
666 | 4096, | |
667 | le32_to_cpu(header.granularity), | |
4823970b FZ |
668 | &extent, |
669 | errp); | |
8aa1331c FZ |
670 | if (ret < 0) { |
671 | return ret; | |
672 | } | |
4823970b | 673 | ret = vmdk_init_tables(bs, extent, errp); |
b4b3ab14 | 674 | if (ret) { |
86c6b429 FZ |
675 | /* free extent allocated by vmdk_add_extent */ |
676 | vmdk_free_last_extent(bs); | |
b4b3ab14 | 677 | } |
b4b3ab14 FZ |
678 | return ret; |
679 | } | |
680 | ||
98eb9733 SE |
681 | #define SESPARSE_CONST_HEADER_MAGIC UINT64_C(0x00000000cafebabe) |
682 | #define SESPARSE_VOLATILE_HEADER_MAGIC UINT64_C(0x00000000cafecafe) | |
683 | ||
684 | /* Strict checks - format not officially documented */ | |
685 | static int check_se_sparse_const_header(VMDKSESparseConstHeader *header, | |
686 | Error **errp) | |
687 | { | |
688 | header->magic = le64_to_cpu(header->magic); | |
689 | header->version = le64_to_cpu(header->version); | |
690 | header->grain_size = le64_to_cpu(header->grain_size); | |
691 | header->grain_table_size = le64_to_cpu(header->grain_table_size); | |
692 | header->flags = le64_to_cpu(header->flags); | |
693 | header->reserved1 = le64_to_cpu(header->reserved1); | |
694 | header->reserved2 = le64_to_cpu(header->reserved2); | |
695 | header->reserved3 = le64_to_cpu(header->reserved3); | |
696 | header->reserved4 = le64_to_cpu(header->reserved4); | |
697 | ||
698 | header->volatile_header_offset = | |
699 | le64_to_cpu(header->volatile_header_offset); | |
700 | header->volatile_header_size = le64_to_cpu(header->volatile_header_size); | |
701 | ||
702 | header->journal_header_offset = le64_to_cpu(header->journal_header_offset); | |
703 | header->journal_header_size = le64_to_cpu(header->journal_header_size); | |
704 | ||
705 | header->journal_offset = le64_to_cpu(header->journal_offset); | |
706 | header->journal_size = le64_to_cpu(header->journal_size); | |
707 | ||
708 | header->grain_dir_offset = le64_to_cpu(header->grain_dir_offset); | |
709 | header->grain_dir_size = le64_to_cpu(header->grain_dir_size); | |
710 | ||
711 | header->grain_tables_offset = le64_to_cpu(header->grain_tables_offset); | |
712 | header->grain_tables_size = le64_to_cpu(header->grain_tables_size); | |
713 | ||
714 | header->free_bitmap_offset = le64_to_cpu(header->free_bitmap_offset); | |
715 | header->free_bitmap_size = le64_to_cpu(header->free_bitmap_size); | |
716 | ||
717 | header->backmap_offset = le64_to_cpu(header->backmap_offset); | |
718 | header->backmap_size = le64_to_cpu(header->backmap_size); | |
719 | ||
720 | header->grains_offset = le64_to_cpu(header->grains_offset); | |
721 | header->grains_size = le64_to_cpu(header->grains_size); | |
722 | ||
723 | if (header->magic != SESPARSE_CONST_HEADER_MAGIC) { | |
724 | error_setg(errp, "Bad const header magic: 0x%016" PRIx64, | |
725 | header->magic); | |
726 | return -EINVAL; | |
727 | } | |
728 | ||
729 | if (header->version != 0x0000000200000001) { | |
730 | error_setg(errp, "Unsupported version: 0x%016" PRIx64, | |
731 | header->version); | |
732 | return -ENOTSUP; | |
733 | } | |
734 | ||
735 | if (header->grain_size != 8) { | |
736 | error_setg(errp, "Unsupported grain size: %" PRIu64, | |
737 | header->grain_size); | |
738 | return -ENOTSUP; | |
739 | } | |
740 | ||
741 | if (header->grain_table_size != 64) { | |
742 | error_setg(errp, "Unsupported grain table size: %" PRIu64, | |
743 | header->grain_table_size); | |
744 | return -ENOTSUP; | |
745 | } | |
746 | ||
747 | if (header->flags != 0) { | |
748 | error_setg(errp, "Unsupported flags: 0x%016" PRIx64, | |
749 | header->flags); | |
750 | return -ENOTSUP; | |
751 | } | |
752 | ||
753 | if (header->reserved1 != 0 || header->reserved2 != 0 || | |
754 | header->reserved3 != 0 || header->reserved4 != 0) { | |
755 | error_setg(errp, "Unsupported reserved bits:" | |
756 | " 0x%016" PRIx64 " 0x%016" PRIx64 | |
757 | " 0x%016" PRIx64 " 0x%016" PRIx64, | |
758 | header->reserved1, header->reserved2, | |
759 | header->reserved3, header->reserved4); | |
760 | return -ENOTSUP; | |
761 | } | |
762 | ||
763 | /* check that padding is 0 */ | |
764 | if (!buffer_is_zero(header->pad, sizeof(header->pad))) { | |
765 | error_setg(errp, "Unsupported non-zero const header padding"); | |
766 | return -ENOTSUP; | |
767 | } | |
768 | ||
769 | return 0; | |
770 | } | |
771 | ||
772 | static int check_se_sparse_volatile_header(VMDKSESparseVolatileHeader *header, | |
773 | Error **errp) | |
774 | { | |
775 | header->magic = le64_to_cpu(header->magic); | |
776 | header->free_gt_number = le64_to_cpu(header->free_gt_number); | |
777 | header->next_txn_seq_number = le64_to_cpu(header->next_txn_seq_number); | |
778 | header->replay_journal = le64_to_cpu(header->replay_journal); | |
779 | ||
780 | if (header->magic != SESPARSE_VOLATILE_HEADER_MAGIC) { | |
781 | error_setg(errp, "Bad volatile header magic: 0x%016" PRIx64, | |
782 | header->magic); | |
783 | return -EINVAL; | |
784 | } | |
785 | ||
786 | if (header->replay_journal) { | |
787 | error_setg(errp, "Image is dirty, Replaying journal not supported"); | |
788 | return -ENOTSUP; | |
789 | } | |
790 | ||
791 | /* check that padding is 0 */ | |
792 | if (!buffer_is_zero(header->pad, sizeof(header->pad))) { | |
793 | error_setg(errp, "Unsupported non-zero volatile header padding"); | |
794 | return -ENOTSUP; | |
795 | } | |
796 | ||
797 | return 0; | |
798 | } | |
799 | ||
b7cfc7d5 KW |
800 | static int GRAPH_RDLOCK |
801 | vmdk_open_se_sparse(BlockDriverState *bs, BdrvChild *file, int flags, | |
802 | Error **errp) | |
98eb9733 SE |
803 | { |
804 | int ret; | |
805 | VMDKSESparseConstHeader const_header; | |
806 | VMDKSESparseVolatileHeader volatile_header; | |
cd466702 | 807 | VmdkExtent *extent = NULL; |
98eb9733 SE |
808 | |
809 | ret = bdrv_apply_auto_read_only(bs, | |
810 | "No write support for seSparse images available", errp); | |
811 | if (ret < 0) { | |
812 | return ret; | |
813 | } | |
814 | ||
815 | assert(sizeof(const_header) == SECTOR_SIZE); | |
816 | ||
32cc71de | 817 | ret = bdrv_pread(file, 0, sizeof(const_header), &const_header, 0); |
98eb9733 SE |
818 | if (ret < 0) { |
819 | bdrv_refresh_filename(file->bs); | |
820 | error_setg_errno(errp, -ret, | |
821 | "Could not read const header from file '%s'", | |
822 | file->bs->filename); | |
823 | return ret; | |
824 | } | |
825 | ||
826 | /* check const header */ | |
827 | ret = check_se_sparse_const_header(&const_header, errp); | |
828 | if (ret < 0) { | |
829 | return ret; | |
830 | } | |
831 | ||
832 | assert(sizeof(volatile_header) == SECTOR_SIZE); | |
833 | ||
53fb7844 | 834 | ret = bdrv_pread(file, const_header.volatile_header_offset * SECTOR_SIZE, |
32cc71de | 835 | sizeof(volatile_header), &volatile_header, 0); |
98eb9733 SE |
836 | if (ret < 0) { |
837 | bdrv_refresh_filename(file->bs); | |
838 | error_setg_errno(errp, -ret, | |
839 | "Could not read volatile header from file '%s'", | |
840 | file->bs->filename); | |
841 | return ret; | |
842 | } | |
843 | ||
844 | /* check volatile header */ | |
845 | ret = check_se_sparse_volatile_header(&volatile_header, errp); | |
846 | if (ret < 0) { | |
847 | return ret; | |
848 | } | |
849 | ||
850 | ret = vmdk_add_extent(bs, file, false, | |
851 | const_header.capacity, | |
852 | const_header.grain_dir_offset * SECTOR_SIZE, | |
853 | 0, | |
854 | const_header.grain_dir_size * | |
855 | SECTOR_SIZE / sizeof(uint64_t), | |
856 | const_header.grain_table_size * | |
857 | SECTOR_SIZE / sizeof(uint64_t), | |
858 | const_header.grain_size, | |
859 | &extent, | |
860 | errp); | |
861 | if (ret < 0) { | |
862 | return ret; | |
863 | } | |
864 | ||
865 | extent->sesparse = true; | |
866 | extent->sesparse_l2_tables_offset = const_header.grain_tables_offset; | |
867 | extent->sesparse_clusters_offset = const_header.grains_offset; | |
868 | extent->entry_size = sizeof(uint64_t); | |
869 | ||
870 | ret = vmdk_init_tables(bs, extent, errp); | |
871 | if (ret) { | |
872 | /* free extent allocated by vmdk_add_extent */ | |
873 | vmdk_free_last_extent(bs); | |
874 | } | |
875 | ||
876 | return ret; | |
877 | } | |
878 | ||
d1833ef5 | 879 | static int vmdk_open_desc_file(BlockDriverState *bs, int flags, char *buf, |
a6468367 | 880 | QDict *options, Error **errp); |
f16f509d | 881 | |
cf2ab8fc | 882 | static char *vmdk_read_desc(BdrvChild *file, uint64_t desc_offset, Error **errp) |
a8842e6d PB |
883 | { |
884 | int64_t size; | |
885 | char *buf; | |
886 | int ret; | |
887 | ||
cf2ab8fc | 888 | size = bdrv_getlength(file->bs); |
a8842e6d PB |
889 | if (size < 0) { |
890 | error_setg_errno(errp, -size, "Could not access file"); | |
891 | return NULL; | |
892 | } | |
893 | ||
03c3359d FZ |
894 | if (size < 4) { |
895 | /* Both descriptor file and sparse image must be much larger than 4 | |
896 | * bytes, also callers of vmdk_read_desc want to compare the first 4 | |
897 | * bytes with VMDK4_MAGIC, let's error out if less is read. */ | |
898 | error_setg(errp, "File is too small, not a valid image"); | |
899 | return NULL; | |
900 | } | |
901 | ||
73b7bcad FZ |
902 | size = MIN(size, (1 << 20) - 1); /* avoid unbounded allocation */ |
903 | buf = g_malloc(size + 1); | |
a8842e6d | 904 | |
32cc71de | 905 | ret = bdrv_pread(file, desc_offset, size, buf, 0); |
a8842e6d PB |
906 | if (ret < 0) { |
907 | error_setg_errno(errp, -ret, "Could not read from file"); | |
908 | g_free(buf); | |
909 | return NULL; | |
910 | } | |
353a5d84 | 911 | buf[size] = 0; |
a8842e6d PB |
912 | |
913 | return buf; | |
914 | } | |
915 | ||
b7cfc7d5 KW |
916 | static int GRAPH_RDLOCK |
917 | vmdk_open_vmdk4(BlockDriverState *bs, BdrvChild *file, int flags, | |
918 | QDict *options, Error **errp) | |
b4b3ab14 FZ |
919 | { |
920 | int ret; | |
921 | uint32_t magic; | |
922 | uint32_t l1_size, l1_entry_sectors; | |
923 | VMDK4Header header; | |
cd466702 | 924 | VmdkExtent *extent = NULL; |
f4c129a3 | 925 | BDRVVmdkState *s = bs->opaque; |
bb45ded9 | 926 | int64_t l1_backup_offset = 0; |
3db1d98a | 927 | bool compressed; |
b4b3ab14 | 928 | |
32cc71de | 929 | ret = bdrv_pread(file, sizeof(magic), sizeof(header), &header, 0); |
b4b3ab14 | 930 | if (ret < 0) { |
f30c66ba | 931 | bdrv_refresh_filename(file->bs); |
4823970b FZ |
932 | error_setg_errno(errp, -ret, |
933 | "Could not read header from file '%s'", | |
24bc15d1 | 934 | file->bs->filename); |
89ac8480 | 935 | return -EINVAL; |
b4b3ab14 | 936 | } |
5a394b9e | 937 | if (header.capacity == 0) { |
e98768d4 | 938 | uint64_t desc_offset = le64_to_cpu(header.desc_offset); |
5a394b9e | 939 | if (desc_offset) { |
cf2ab8fc | 940 | char *buf = vmdk_read_desc(file, desc_offset << 9, errp); |
d1833ef5 PB |
941 | if (!buf) { |
942 | return -EINVAL; | |
943 | } | |
a6468367 | 944 | ret = vmdk_open_desc_file(bs, flags, buf, options, errp); |
d1833ef5 PB |
945 | g_free(buf); |
946 | return ret; | |
5a394b9e | 947 | } |
f16f509d | 948 | } |
65bd155c | 949 | |
f4c129a3 FZ |
950 | if (!s->create_type) { |
951 | s->create_type = g_strdup("monolithicSparse"); | |
952 | } | |
953 | ||
65bd155c KW |
954 | if (le64_to_cpu(header.gd_offset) == VMDK4_GD_AT_END) { |
955 | /* | |
956 | * The footer takes precedence over the header, so read it in. The | |
957 | * footer starts at offset -1024 from the end: One sector for the | |
958 | * footer, and another one for the end-of-stream marker. | |
959 | */ | |
960 | struct { | |
961 | struct { | |
962 | uint64_t val; | |
963 | uint32_t size; | |
964 | uint32_t type; | |
965 | uint8_t pad[512 - 16]; | |
966 | } QEMU_PACKED footer_marker; | |
967 | ||
968 | uint32_t magic; | |
969 | VMDK4Header header; | |
970 | uint8_t pad[512 - 4 - sizeof(VMDK4Header)]; | |
971 | ||
972 | struct { | |
973 | uint64_t val; | |
974 | uint32_t size; | |
975 | uint32_t type; | |
976 | uint8_t pad[512 - 16]; | |
977 | } QEMU_PACKED eos_marker; | |
978 | } QEMU_PACKED footer; | |
979 | ||
53fb7844 | 980 | ret = bdrv_pread(file, bs->file->bs->total_sectors * 512 - 1536, |
32cc71de | 981 | sizeof(footer), &footer, 0); |
65bd155c | 982 | if (ret < 0) { |
d899d2e2 | 983 | error_setg_errno(errp, -ret, "Failed to read footer"); |
65bd155c KW |
984 | return ret; |
985 | } | |
986 | ||
987 | /* Some sanity checks for the footer */ | |
988 | if (be32_to_cpu(footer.magic) != VMDK4_MAGIC || | |
989 | le32_to_cpu(footer.footer_marker.size) != 0 || | |
990 | le32_to_cpu(footer.footer_marker.type) != MARKER_FOOTER || | |
991 | le64_to_cpu(footer.eos_marker.val) != 0 || | |
992 | le32_to_cpu(footer.eos_marker.size) != 0 || | |
993 | le32_to_cpu(footer.eos_marker.type) != MARKER_END_OF_STREAM) | |
994 | { | |
d899d2e2 | 995 | error_setg(errp, "Invalid footer"); |
65bd155c KW |
996 | return -EINVAL; |
997 | } | |
998 | ||
999 | header = footer.header; | |
1000 | } | |
1001 | ||
3db1d98a FZ |
1002 | compressed = |
1003 | le16_to_cpu(header.compressAlgorithm) == VMDK4_COMPRESSION_DEFLATE; | |
509d39aa | 1004 | if (le32_to_cpu(header.version) > 3) { |
a55448b3 HR |
1005 | error_setg(errp, "Unsupported VMDK version %" PRIu32, |
1006 | le32_to_cpu(header.version)); | |
96c51eb5 | 1007 | return -ENOTSUP; |
3db1d98a FZ |
1008 | } else if (le32_to_cpu(header.version) == 3 && (flags & BDRV_O_RDWR) && |
1009 | !compressed) { | |
509d39aa FZ |
1010 | /* VMware KB 2064959 explains that version 3 added support for |
1011 | * persistent changed block tracking (CBT), and backup software can | |
1012 | * read it as version=1 if it doesn't care about the changed area | |
1013 | * information. So we are safe to enable read only. */ | |
1014 | error_setg(errp, "VMDK version 3 must be read only"); | |
1015 | return -EINVAL; | |
96c51eb5 FZ |
1016 | } |
1017 | ||
ca8804ce | 1018 | if (le32_to_cpu(header.num_gtes_per_gt) > 512) { |
89ac8480 | 1019 | error_setg(errp, "L2 table size too big"); |
f8ce0403 FZ |
1020 | return -EINVAL; |
1021 | } | |
1022 | ||
ca8804ce | 1023 | l1_entry_sectors = le32_to_cpu(header.num_gtes_per_gt) |
b4b3ab14 | 1024 | * le64_to_cpu(header.granularity); |
75d12341 | 1025 | if (l1_entry_sectors == 0) { |
d899d2e2 | 1026 | error_setg(errp, "L1 entry size is invalid"); |
86c6b429 FZ |
1027 | return -EINVAL; |
1028 | } | |
b4b3ab14 FZ |
1029 | l1_size = (le64_to_cpu(header.capacity) + l1_entry_sectors - 1) |
1030 | / l1_entry_sectors; | |
bb45ded9 FZ |
1031 | if (le32_to_cpu(header.flags) & VMDK4_FLAG_RGD) { |
1032 | l1_backup_offset = le64_to_cpu(header.rgd_offset) << 9; | |
1033 | } | |
24bc15d1 | 1034 | if (bdrv_nb_sectors(file->bs) < le64_to_cpu(header.grain_offset)) { |
4ab9dab5 FZ |
1035 | error_setg(errp, "File truncated, expecting at least %" PRId64 " bytes", |
1036 | (int64_t)(le64_to_cpu(header.grain_offset) | |
1037 | * BDRV_SECTOR_SIZE)); | |
34ceed81 FZ |
1038 | return -EINVAL; |
1039 | } | |
1040 | ||
8aa1331c | 1041 | ret = vmdk_add_extent(bs, file, false, |
b4b3ab14 FZ |
1042 | le64_to_cpu(header.capacity), |
1043 | le64_to_cpu(header.gd_offset) << 9, | |
bb45ded9 | 1044 | l1_backup_offset, |
b4b3ab14 | 1045 | l1_size, |
ca8804ce | 1046 | le32_to_cpu(header.num_gtes_per_gt), |
8aa1331c | 1047 | le64_to_cpu(header.granularity), |
4823970b FZ |
1048 | &extent, |
1049 | errp); | |
8aa1331c FZ |
1050 | if (ret < 0) { |
1051 | return ret; | |
1052 | } | |
432bb170 FZ |
1053 | extent->compressed = |
1054 | le16_to_cpu(header.compressAlgorithm) == VMDK4_COMPRESSION_DEFLATE; | |
d8a7b061 FZ |
1055 | if (extent->compressed) { |
1056 | g_free(s->create_type); | |
1057 | s->create_type = g_strdup("streamOptimized"); | |
1058 | } | |
432bb170 | 1059 | extent->has_marker = le32_to_cpu(header.flags) & VMDK4_FLAG_MARKER; |
14ead646 FZ |
1060 | extent->version = le32_to_cpu(header.version); |
1061 | extent->has_zero_grain = le32_to_cpu(header.flags) & VMDK4_FLAG_ZERO_GRAIN; | |
4823970b | 1062 | ret = vmdk_init_tables(bs, extent, errp); |
b4b3ab14 | 1063 | if (ret) { |
86c6b429 FZ |
1064 | /* free extent allocated by vmdk_add_extent */ |
1065 | vmdk_free_last_extent(bs); | |
b4b3ab14 | 1066 | } |
b4b3ab14 FZ |
1067 | return ret; |
1068 | } | |
1069 | ||
7fa60fa3 FZ |
1070 | /* find an option value out of descriptor file */ |
1071 | static int vmdk_parse_description(const char *desc, const char *opt_name, | |
1072 | char *buf, int buf_size) | |
1073 | { | |
1074 | char *opt_pos, *opt_end; | |
1075 | const char *end = desc + strlen(desc); | |
1076 | ||
1077 | opt_pos = strstr(desc, opt_name); | |
1078 | if (!opt_pos) { | |
65f74725 | 1079 | return VMDK_ERROR; |
7fa60fa3 FZ |
1080 | } |
1081 | /* Skip "=\"" following opt_name */ | |
1082 | opt_pos += strlen(opt_name) + 2; | |
1083 | if (opt_pos >= end) { | |
65f74725 | 1084 | return VMDK_ERROR; |
7fa60fa3 FZ |
1085 | } |
1086 | opt_end = opt_pos; | |
1087 | while (opt_end < end && *opt_end != '"') { | |
1088 | opt_end++; | |
1089 | } | |
1090 | if (opt_end == end || buf_size < opt_end - opt_pos + 1) { | |
65f74725 | 1091 | return VMDK_ERROR; |
7fa60fa3 FZ |
1092 | } |
1093 | pstrcpy(buf, opt_end - opt_pos + 1, opt_pos); | |
65f74725 | 1094 | return VMDK_OK; |
7fa60fa3 FZ |
1095 | } |
1096 | ||
86c6b429 | 1097 | /* Open an extent file and append to bs array */ |
b7cfc7d5 KW |
1098 | static int GRAPH_RDLOCK |
1099 | vmdk_open_sparse(BlockDriverState *bs, BdrvChild *file, int flags, | |
1100 | char *buf, QDict *options, Error **errp) | |
86c6b429 FZ |
1101 | { |
1102 | uint32_t magic; | |
1103 | ||
d1833ef5 | 1104 | magic = ldl_be_p(buf); |
86c6b429 FZ |
1105 | switch (magic) { |
1106 | case VMDK3_MAGIC: | |
4823970b | 1107 | return vmdk_open_vmfs_sparse(bs, file, flags, errp); |
86c6b429 | 1108 | case VMDK4_MAGIC: |
a6468367 | 1109 | return vmdk_open_vmdk4(bs, file, flags, options, errp); |
86c6b429 | 1110 | default: |
76abe407 PB |
1111 | error_setg(errp, "Image not in VMDK format"); |
1112 | return -EINVAL; | |
86c6b429 FZ |
1113 | } |
1114 | } | |
1115 | ||
e4937694 MA |
1116 | static const char *next_line(const char *s) |
1117 | { | |
1118 | while (*s) { | |
1119 | if (*s == '\n') { | |
1120 | return s + 1; | |
1121 | } | |
1122 | s++; | |
1123 | } | |
1124 | return s; | |
1125 | } | |
1126 | ||
b7cfc7d5 KW |
1127 | static int GRAPH_RDLOCK |
1128 | vmdk_parse_extents(const char *desc, BlockDriverState *bs, QDict *options, | |
1129 | Error **errp) | |
7fa60fa3 FZ |
1130 | { |
1131 | int ret; | |
395a22fa | 1132 | int matches; |
7fa60fa3 FZ |
1133 | char access[11]; |
1134 | char type[11]; | |
1135 | char fname[512]; | |
d28d737f | 1136 | const char *p, *np; |
7fa60fa3 FZ |
1137 | int64_t sectors = 0; |
1138 | int64_t flat_offset; | |
cdc0dd25 | 1139 | char *desc_file_dir = NULL; |
fe206562 | 1140 | char *extent_path; |
24bc15d1 | 1141 | BdrvChild *extent_file; |
8b1869da | 1142 | BdrvChildRole extent_role; |
f4c129a3 | 1143 | BDRVVmdkState *s = bs->opaque; |
cd466702 | 1144 | VmdkExtent *extent = NULL; |
a6468367 | 1145 | char extent_opt_prefix[32]; |
24bc15d1 | 1146 | Error *local_err = NULL; |
7fa60fa3 | 1147 | |
b7cfc7d5 KW |
1148 | GLOBAL_STATE_CODE(); |
1149 | ||
e4937694 | 1150 | for (p = desc; *p; p = next_line(p)) { |
8a3e0bc3 FZ |
1151 | /* parse extent line in one of below formats: |
1152 | * | |
7fa60fa3 | 1153 | * RW [size in sectors] FLAT "file-name.vmdk" OFFSET |
7fa60fa3 | 1154 | * RW [size in sectors] SPARSE "file-name.vmdk" |
8a3e0bc3 FZ |
1155 | * RW [size in sectors] VMFS "file-name.vmdk" |
1156 | * RW [size in sectors] VMFSSPARSE "file-name.vmdk" | |
98eb9733 | 1157 | * RW [size in sectors] SESPARSE "file-name.vmdk" |
7fa60fa3 FZ |
1158 | */ |
1159 | flat_offset = -1; | |
395a22fa JC |
1160 | matches = sscanf(p, "%10s %" SCNd64 " %10s \"%511[^\n\r\"]\" %" SCNd64, |
1161 | access, §ors, type, fname, &flat_offset); | |
1162 | if (matches < 4 || strcmp(access, "RW")) { | |
e4937694 | 1163 | continue; |
7fa60fa3 | 1164 | } else if (!strcmp(type, "FLAT")) { |
395a22fa | 1165 | if (matches != 5 || flat_offset < 0) { |
d28d737f | 1166 | goto invalid; |
7fa60fa3 | 1167 | } |
dbbcaa8d | 1168 | } else if (!strcmp(type, "VMFS")) { |
395a22fa | 1169 | if (matches == 4) { |
b47053bd FZ |
1170 | flat_offset = 0; |
1171 | } else { | |
d28d737f | 1172 | goto invalid; |
b47053bd | 1173 | } |
395a22fa | 1174 | } else if (matches != 4) { |
d28d737f | 1175 | goto invalid; |
7fa60fa3 FZ |
1176 | } |
1177 | ||
7fa60fa3 | 1178 | if (sectors <= 0 || |
daac8fdc | 1179 | (strcmp(type, "FLAT") && strcmp(type, "SPARSE") && |
98eb9733 SE |
1180 | strcmp(type, "VMFS") && strcmp(type, "VMFSSPARSE") && |
1181 | strcmp(type, "SESPARSE")) || | |
7fa60fa3 | 1182 | (strcmp(access, "RW"))) { |
e4937694 | 1183 | continue; |
7fa60fa3 FZ |
1184 | } |
1185 | ||
cdc0dd25 HR |
1186 | if (path_is_absolute(fname)) { |
1187 | extent_path = g_strdup(fname); | |
1188 | } else { | |
1189 | if (!desc_file_dir) { | |
1190 | desc_file_dir = bdrv_dirname(bs->file->bs, errp); | |
1191 | if (!desc_file_dir) { | |
1192 | bdrv_refresh_filename(bs->file->bs); | |
1193 | error_prepend(errp, "Cannot use relative paths with VMDK " | |
1194 | "descriptor file '%s': ", | |
1195 | bs->file->bs->filename); | |
1196 | ret = -EINVAL; | |
1197 | goto out; | |
1198 | } | |
1199 | } | |
5c98415b | 1200 | |
cdc0dd25 HR |
1201 | extent_path = g_strconcat(desc_file_dir, fname, NULL); |
1202 | } | |
a6468367 KW |
1203 | |
1204 | ret = snprintf(extent_opt_prefix, 32, "extents.%d", s->num_extents); | |
1205 | assert(ret < 32); | |
1206 | ||
8b1869da HR |
1207 | extent_role = BDRV_CHILD_DATA; |
1208 | if (strcmp(type, "FLAT") != 0 && strcmp(type, "VMFS") != 0) { | |
1209 | /* non-flat extents have metadata */ | |
1210 | extent_role |= BDRV_CHILD_METADATA; | |
1211 | } | |
1212 | ||
24bc15d1 | 1213 | extent_file = bdrv_open_child(extent_path, options, extent_opt_prefix, |
8b1869da HR |
1214 | bs, &child_of_bds, extent_role, false, |
1215 | &local_err); | |
fe206562 | 1216 | g_free(extent_path); |
a8d99c0e | 1217 | if (!extent_file) { |
24bc15d1 | 1218 | error_propagate(errp, local_err); |
cdc0dd25 HR |
1219 | ret = -EINVAL; |
1220 | goto out; | |
86c6b429 FZ |
1221 | } |
1222 | ||
7fa60fa3 | 1223 | /* save to extents array */ |
04d542c8 | 1224 | if (!strcmp(type, "FLAT") || !strcmp(type, "VMFS")) { |
7fa60fa3 | 1225 | /* FLAT extent */ |
7fa60fa3 | 1226 | |
8aa1331c | 1227 | ret = vmdk_add_extent(bs, extent_file, true, sectors, |
4823970b | 1228 | 0, 0, 0, 0, 0, &extent, errp); |
8aa1331c | 1229 | if (ret < 0) { |
b7cfc7d5 | 1230 | bdrv_graph_rdunlock_main_loop(); |
32a8aba3 | 1231 | bdrv_graph_wrlock(NULL); |
24bc15d1 | 1232 | bdrv_unref_child(bs, extent_file); |
32a8aba3 | 1233 | bdrv_graph_wrunlock(); |
b7cfc7d5 | 1234 | bdrv_graph_rdlock_main_loop(); |
cdc0dd25 | 1235 | goto out; |
8aa1331c | 1236 | } |
f16f509d | 1237 | extent->flat_start_offset = flat_offset << 9; |
daac8fdc FZ |
1238 | } else if (!strcmp(type, "SPARSE") || !strcmp(type, "VMFSSPARSE")) { |
1239 | /* SPARSE extent and VMFSSPARSE extent are both "COWD" sparse file*/ | |
cf2ab8fc | 1240 | char *buf = vmdk_read_desc(extent_file, 0, errp); |
d1833ef5 PB |
1241 | if (!buf) { |
1242 | ret = -EINVAL; | |
1243 | } else { | |
a6468367 KW |
1244 | ret = vmdk_open_sparse(bs, extent_file, bs->open_flags, buf, |
1245 | options, errp); | |
d1833ef5 | 1246 | } |
b6b1d31f | 1247 | g_free(buf); |
86c6b429 | 1248 | if (ret) { |
b7cfc7d5 | 1249 | bdrv_graph_rdunlock_main_loop(); |
32a8aba3 | 1250 | bdrv_graph_wrlock(NULL); |
24bc15d1 | 1251 | bdrv_unref_child(bs, extent_file); |
32a8aba3 | 1252 | bdrv_graph_wrunlock(); |
b7cfc7d5 | 1253 | bdrv_graph_rdlock_main_loop(); |
cdc0dd25 | 1254 | goto out; |
86c6b429 | 1255 | } |
f4c129a3 | 1256 | extent = &s->extents[s->num_extents - 1]; |
98eb9733 SE |
1257 | } else if (!strcmp(type, "SESPARSE")) { |
1258 | ret = vmdk_open_se_sparse(bs, extent_file, bs->open_flags, errp); | |
1259 | if (ret) { | |
b7cfc7d5 | 1260 | bdrv_graph_rdunlock_main_loop(); |
32a8aba3 | 1261 | bdrv_graph_wrlock(NULL); |
98eb9733 | 1262 | bdrv_unref_child(bs, extent_file); |
32a8aba3 | 1263 | bdrv_graph_wrunlock(); |
b7cfc7d5 | 1264 | bdrv_graph_rdlock_main_loop(); |
cdc0dd25 | 1265 | goto out; |
98eb9733 SE |
1266 | } |
1267 | extent = &s->extents[s->num_extents - 1]; | |
7fa60fa3 | 1268 | } else { |
4823970b | 1269 | error_setg(errp, "Unsupported extent type '%s'", type); |
b7cfc7d5 | 1270 | bdrv_graph_rdunlock_main_loop(); |
32a8aba3 | 1271 | bdrv_graph_wrlock(NULL); |
24bc15d1 | 1272 | bdrv_unref_child(bs, extent_file); |
32a8aba3 | 1273 | bdrv_graph_wrunlock(); |
b7cfc7d5 | 1274 | bdrv_graph_rdlock_main_loop(); |
cdc0dd25 HR |
1275 | ret = -ENOTSUP; |
1276 | goto out; | |
7fa60fa3 | 1277 | } |
f4c129a3 | 1278 | extent->type = g_strdup(type); |
7fa60fa3 | 1279 | } |
cdc0dd25 HR |
1280 | |
1281 | ret = 0; | |
1282 | goto out; | |
d28d737f MA |
1283 | |
1284 | invalid: | |
1285 | np = next_line(p); | |
1286 | assert(np != p); | |
1287 | if (np[-1] == '\n') { | |
1288 | np--; | |
1289 | } | |
1290 | error_setg(errp, "Invalid extent line: %.*s", (int)(np - p), p); | |
cdc0dd25 HR |
1291 | ret = -EINVAL; |
1292 | ||
1293 | out: | |
1294 | g_free(desc_file_dir); | |
1295 | return ret; | |
7fa60fa3 FZ |
1296 | } |
1297 | ||
b7cfc7d5 KW |
1298 | static int GRAPH_RDLOCK |
1299 | vmdk_open_desc_file(BlockDriverState *bs, int flags, char *buf, QDict *options, | |
1300 | Error **errp) | |
7fa60fa3 FZ |
1301 | { |
1302 | int ret; | |
7fa60fa3 FZ |
1303 | char ct[128]; |
1304 | BDRVVmdkState *s = bs->opaque; | |
1305 | ||
7fa60fa3 | 1306 | if (vmdk_parse_description(buf, "createType", ct, sizeof(ct))) { |
76abe407 PB |
1307 | error_setg(errp, "invalid VMDK image descriptor"); |
1308 | ret = -EINVAL; | |
0bed087d | 1309 | goto exit; |
7fa60fa3 | 1310 | } |
6398de51 | 1311 | if (strcmp(ct, "monolithicFlat") && |
04d542c8 | 1312 | strcmp(ct, "vmfs") && |
daac8fdc | 1313 | strcmp(ct, "vmfsSparse") && |
98eb9733 | 1314 | strcmp(ct, "seSparse") && |
86c6b429 | 1315 | strcmp(ct, "twoGbMaxExtentSparse") && |
6398de51 | 1316 | strcmp(ct, "twoGbMaxExtentFlat")) { |
4823970b | 1317 | error_setg(errp, "Unsupported image type '%s'", ct); |
0bed087d EB |
1318 | ret = -ENOTSUP; |
1319 | goto exit; | |
7fa60fa3 | 1320 | } |
f4c129a3 | 1321 | s->create_type = g_strdup(ct); |
7fa60fa3 | 1322 | s->desc_offset = 0; |
cdc0dd25 | 1323 | ret = vmdk_parse_extents(buf, bs, options, errp); |
0bed087d | 1324 | exit: |
0bed087d | 1325 | return ret; |
7fa60fa3 FZ |
1326 | } |
1327 | ||
015a1036 HR |
1328 | static int vmdk_open(BlockDriverState *bs, QDict *options, int flags, |
1329 | Error **errp) | |
b4b3ab14 | 1330 | { |
9aeecbbc | 1331 | char *buf; |
86c6b429 FZ |
1332 | int ret; |
1333 | BDRVVmdkState *s = bs->opaque; | |
37f09e5e | 1334 | uint32_t magic; |
b4b3ab14 | 1335 | |
3804e3cf KW |
1336 | GRAPH_RDLOCK_GUARD_MAINLOOP(); |
1337 | ||
83930780 VSO |
1338 | ret = bdrv_open_file_child(NULL, options, "file", bs, errp); |
1339 | if (ret < 0) { | |
1340 | return ret; | |
4e4bf5c4 KW |
1341 | } |
1342 | ||
cf2ab8fc | 1343 | buf = vmdk_read_desc(bs->file, 0, errp); |
d1833ef5 PB |
1344 | if (!buf) { |
1345 | return -EINVAL; | |
1346 | } | |
1347 | ||
37f09e5e PB |
1348 | magic = ldl_be_p(buf); |
1349 | switch (magic) { | |
1350 | case VMDK3_MAGIC: | |
1351 | case VMDK4_MAGIC: | |
9a4f4c31 | 1352 | ret = vmdk_open_sparse(bs, bs->file, flags, buf, options, |
24bc15d1 | 1353 | errp); |
37f09e5e PB |
1354 | s->desc_offset = 0x200; |
1355 | break; | |
1356 | default: | |
8b1869da HR |
1357 | /* No data in the descriptor file */ |
1358 | bs->file->role &= ~BDRV_CHILD_DATA; | |
1359 | ||
1360 | /* Must succeed because we have given up permissions if anything */ | |
1361 | bdrv_child_refresh_perms(bs, bs->file, &error_abort); | |
1362 | ||
a6468367 | 1363 | ret = vmdk_open_desc_file(bs, flags, buf, options, errp); |
37f09e5e | 1364 | break; |
b4b3ab14 | 1365 | } |
37f09e5e PB |
1366 | if (ret) { |
1367 | goto fail; | |
1368 | } | |
1369 | ||
bae0a0cc PB |
1370 | /* try to open parent images, if exist */ |
1371 | ret = vmdk_parent_open(bs); | |
1372 | if (ret) { | |
1373 | goto fail; | |
1374 | } | |
9877860e PM |
1375 | ret = vmdk_read_cid(bs, 0, &s->cid); |
1376 | if (ret) { | |
1377 | goto fail; | |
1378 | } | |
1379 | ret = vmdk_read_cid(bs, 1, &s->parent_cid); | |
1380 | if (ret) { | |
1381 | goto fail; | |
1382 | } | |
848c66e8 | 1383 | qemu_co_mutex_init(&s->lock); |
2bc3166c KW |
1384 | |
1385 | /* Disable migration when VMDK images are used */ | |
81e5f78a AG |
1386 | error_setg(&s->migration_blocker, "The vmdk format used by node '%s' " |
1387 | "does not support live migration", | |
1388 | bdrv_get_device_or_node_name(bs)); | |
386f6c07 MA |
1389 | ret = migrate_add_blocker(s->migration_blocker, errp); |
1390 | if (ret < 0) { | |
fe44dc91 AA |
1391 | error_free(s->migration_blocker); |
1392 | goto fail; | |
1393 | } | |
1394 | ||
d1833ef5 | 1395 | g_free(buf); |
2bc3166c | 1396 | return 0; |
bae0a0cc PB |
1397 | |
1398 | fail: | |
d1833ef5 | 1399 | g_free(buf); |
f4c129a3 FZ |
1400 | g_free(s->create_type); |
1401 | s->create_type = NULL; | |
bae0a0cc PB |
1402 | vmdk_free_extents(bs); |
1403 | return ret; | |
ea2384d3 FB |
1404 | } |
1405 | ||
d34682cd | 1406 | |
3baca891 | 1407 | static void vmdk_refresh_limits(BlockDriverState *bs, Error **errp) |
d34682cd KW |
1408 | { |
1409 | BDRVVmdkState *s = bs->opaque; | |
1410 | int i; | |
1411 | ||
1412 | for (i = 0; i < s->num_extents; i++) { | |
1413 | if (!s->extents[i].flat) { | |
cf081fca EB |
1414 | bs->bl.pwrite_zeroes_alignment = |
1415 | MAX(bs->bl.pwrite_zeroes_alignment, | |
1416 | s->extents[i].cluster_sectors << BDRV_SECTOR_BITS); | |
d34682cd KW |
1417 | } |
1418 | } | |
d34682cd KW |
1419 | } |
1420 | ||
c6ac36e1 FZ |
1421 | /** |
1422 | * get_whole_cluster | |
1423 | * | |
1424 | * Copy backing file's cluster that covers @sector_num, otherwise write zero, | |
4823cde5 KW |
1425 | * to the cluster at @cluster_sector_num. If @zeroed is true, we're overwriting |
1426 | * a zeroed cluster in the current layer and must not copy data from the | |
1427 | * backing file. | |
c6ac36e1 FZ |
1428 | * |
1429 | * If @skip_start_sector < @skip_end_sector, the relative range | |
1430 | * [@skip_start_sector, @skip_end_sector) is not copied or written, and leave | |
1431 | * it for call to write user data in the request. | |
1432 | */ | |
b9b10c35 KW |
1433 | static int coroutine_fn GRAPH_RDLOCK |
1434 | get_whole_cluster(BlockDriverState *bs, VmdkExtent *extent, | |
1435 | uint64_t cluster_offset, uint64_t offset, | |
1436 | uint64_t skip_start_bytes, uint64_t skip_end_bytes, | |
1437 | bool zeroed) | |
5f4da8c0 | 1438 | { |
bf81507d | 1439 | int ret = VMDK_OK; |
c6ac36e1 FZ |
1440 | int64_t cluster_bytes; |
1441 | uint8_t *whole_grain; | |
4823cde5 | 1442 | bool copy_from_backing; |
c6ac36e1 FZ |
1443 | |
1444 | /* For COW, align request sector_num to cluster start */ | |
c6ac36e1 | 1445 | cluster_bytes = extent->cluster_sectors << BDRV_SECTOR_BITS; |
37b1d7d8 | 1446 | offset = QEMU_ALIGN_DOWN(offset, cluster_bytes); |
c6ac36e1 | 1447 | whole_grain = qemu_blockalign(bs, cluster_bytes); |
4823cde5 | 1448 | copy_from_backing = bs->backing && !zeroed; |
5f4da8c0 | 1449 | |
4823cde5 | 1450 | if (!copy_from_backing) { |
37b1d7d8 KW |
1451 | memset(whole_grain, 0, skip_start_bytes); |
1452 | memset(whole_grain + skip_end_bytes, 0, cluster_bytes - skip_end_bytes); | |
c6ac36e1 FZ |
1453 | } |
1454 | ||
37b1d7d8 | 1455 | assert(skip_end_bytes <= cluster_bytes); |
0e69c543 FZ |
1456 | /* we will be here if it's first write on non-exist grain(cluster). |
1457 | * try to read from parent image, if exist */ | |
760e0063 | 1458 | if (bs->backing && !vmdk_is_cid_valid(bs)) { |
c6ac36e1 FZ |
1459 | ret = VMDK_ERROR; |
1460 | goto exit; | |
1461 | } | |
5f4da8c0 | 1462 | |
c6ac36e1 | 1463 | /* Read backing data before skip range */ |
37b1d7d8 | 1464 | if (skip_start_bytes > 0) { |
4823cde5 | 1465 | if (copy_from_backing) { |
23c4b2a8 | 1466 | /* qcow2 emits this on bs->file instead of bs->backing */ |
17362398 | 1467 | BLKDBG_CO_EVENT(extent->file, BLKDBG_COW_READ); |
a5c4e5be AF |
1468 | ret = bdrv_co_pread(bs->backing, offset, skip_start_bytes, |
1469 | whole_grain, 0); | |
c6ac36e1 FZ |
1470 | if (ret < 0) { |
1471 | ret = VMDK_ERROR; | |
1472 | goto exit; | |
1473 | } | |
1474 | } | |
17362398 | 1475 | BLKDBG_CO_EVENT(extent->file, BLKDBG_COW_WRITE); |
a5c4e5be AF |
1476 | ret = bdrv_co_pwrite(extent->file, cluster_offset, skip_start_bytes, |
1477 | whole_grain, 0); | |
c336500d | 1478 | if (ret < 0) { |
bf81507d FZ |
1479 | ret = VMDK_ERROR; |
1480 | goto exit; | |
c336500d | 1481 | } |
c6ac36e1 FZ |
1482 | } |
1483 | /* Read backing data after skip range */ | |
37b1d7d8 | 1484 | if (skip_end_bytes < cluster_bytes) { |
4823cde5 | 1485 | if (copy_from_backing) { |
23c4b2a8 | 1486 | /* qcow2 emits this on bs->file instead of bs->backing */ |
17362398 | 1487 | BLKDBG_CO_EVENT(extent->file, BLKDBG_COW_READ); |
a5c4e5be AF |
1488 | ret = bdrv_co_pread(bs->backing, offset + skip_end_bytes, |
1489 | cluster_bytes - skip_end_bytes, | |
1490 | whole_grain + skip_end_bytes, 0); | |
c6ac36e1 FZ |
1491 | if (ret < 0) { |
1492 | ret = VMDK_ERROR; | |
1493 | goto exit; | |
1494 | } | |
1495 | } | |
17362398 | 1496 | BLKDBG_CO_EVENT(extent->file, BLKDBG_COW_WRITE); |
a5c4e5be AF |
1497 | ret = bdrv_co_pwrite(extent->file, cluster_offset + skip_end_bytes, |
1498 | cluster_bytes - skip_end_bytes, | |
1499 | whole_grain + skip_end_bytes, 0); | |
c336500d | 1500 | if (ret < 0) { |
bf81507d FZ |
1501 | ret = VMDK_ERROR; |
1502 | goto exit; | |
630530a6 TS |
1503 | } |
1504 | } | |
c6ac36e1 | 1505 | |
37b1d7d8 | 1506 | ret = VMDK_OK; |
bf81507d FZ |
1507 | exit: |
1508 | qemu_vfree(whole_grain); | |
1509 | return ret; | |
630530a6 TS |
1510 | } |
1511 | ||
88095349 EGE |
1512 | static int coroutine_fn GRAPH_RDLOCK |
1513 | vmdk_L2update(VmdkExtent *extent, VmdkMetaData *m_data, uint32_t offset) | |
630530a6 | 1514 | { |
c6ac36e1 | 1515 | offset = cpu_to_le32(offset); |
630530a6 | 1516 | /* update L2 table */ |
17362398 | 1517 | BLKDBG_CO_EVENT(extent->file, BLKDBG_L2_UPDATE); |
a5c4e5be AF |
1518 | if (bdrv_co_pwrite(extent->file, |
1519 | ((int64_t)m_data->l2_offset * 512) | |
1520 | + (m_data->l2_index * sizeof(offset)), | |
1521 | sizeof(offset), &offset, 0) < 0) { | |
65f74725 | 1522 | return VMDK_ERROR; |
b3976d3c | 1523 | } |
630530a6 | 1524 | /* update backup L2 table */ |
b3976d3c FZ |
1525 | if (extent->l1_backup_table_offset != 0) { |
1526 | m_data->l2_offset = extent->l1_backup_table[m_data->l1_index]; | |
a5c4e5be AF |
1527 | if (bdrv_co_pwrite(extent->file, |
1528 | ((int64_t)m_data->l2_offset * 512) | |
1529 | + (m_data->l2_index * sizeof(offset)), | |
1530 | sizeof(offset), &offset, 0) < 0) { | |
65f74725 | 1531 | return VMDK_ERROR; |
b3976d3c | 1532 | } |
5f4da8c0 | 1533 | } |
a5c4e5be | 1534 | if (bdrv_co_flush(extent->file->bs) < 0) { |
2758be05 KW |
1535 | return VMDK_ERROR; |
1536 | } | |
cdeaf1f1 FZ |
1537 | if (m_data->l2_cache_entry) { |
1538 | *m_data->l2_cache_entry = offset; | |
1539 | } | |
630530a6 | 1540 | |
65f74725 | 1541 | return VMDK_OK; |
5f4da8c0 TS |
1542 | } |
1543 | ||
c6ac36e1 FZ |
1544 | /** |
1545 | * get_cluster_offset | |
1546 | * | |
1547 | * Look up cluster offset in extent file by sector number, and store in | |
1548 | * @cluster_offset. | |
1549 | * | |
1550 | * For flat extents, the start offset as parsed from the description file is | |
1551 | * returned. | |
1552 | * | |
1553 | * For sparse extents, look up in L1, L2 table. If allocate is true, return an | |
1554 | * offset for a new cluster and update L2 cache. If there is a backing file, | |
1555 | * COW is done before returning; otherwise, zeroes are written to the allocated | |
1556 | * cluster. Both COW and zero writing skips the sector range | |
1557 | * [@skip_start_sector, @skip_end_sector) passed in by caller, because caller | |
1558 | * has new data to write there. | |
1559 | * | |
1560 | * Returns: VMDK_OK if cluster exists and mapped in the image. | |
1561 | * VMDK_UNALLOC if cluster is not mapped and @allocate is false. | |
1562 | * VMDK_ERROR if failed. | |
1563 | */ | |
b9b10c35 KW |
1564 | static int coroutine_fn GRAPH_RDLOCK |
1565 | get_cluster_offset(BlockDriverState *bs, VmdkExtent *extent, | |
1566 | VmdkMetaData *m_data, uint64_t offset, bool allocate, | |
1567 | uint64_t *cluster_offset, uint64_t skip_start_bytes, | |
1568 | uint64_t skip_end_bytes) | |
ea2384d3 | 1569 | { |
ea2384d3 FB |
1570 | unsigned int l1_index, l2_offset, l2_index; |
1571 | int min_index, i, j; | |
98eb9733 SE |
1572 | uint32_t min_count; |
1573 | void *l2_table; | |
14ead646 | 1574 | bool zeroed = false; |
c6ac36e1 | 1575 | int64_t ret; |
d1319b07 | 1576 | int64_t cluster_sector; |
98eb9733 | 1577 | unsigned int l2_size_bytes = extent->l2_size * extent->entry_size; |
630530a6 | 1578 | |
ae261c86 | 1579 | if (m_data) { |
4dc20e64 | 1580 | m_data->new_allocation = false; |
ae261c86 | 1581 | } |
91b85bd3 | 1582 | if (extent->flat) { |
7fa60fa3 | 1583 | *cluster_offset = extent->flat_start_offset; |
65f74725 | 1584 | return VMDK_OK; |
91b85bd3 | 1585 | } |
630530a6 | 1586 | |
6398de51 | 1587 | offset -= (extent->end_sector - extent->sectors) * SECTOR_SIZE; |
b3976d3c FZ |
1588 | l1_index = (offset >> 9) / extent->l1_entry_sectors; |
1589 | if (l1_index >= extent->l1_size) { | |
65f74725 | 1590 | return VMDK_ERROR; |
b3976d3c | 1591 | } |
98eb9733 SE |
1592 | if (extent->sesparse) { |
1593 | uint64_t l2_offset_u64; | |
1594 | ||
1595 | assert(extent->entry_size == sizeof(uint64_t)); | |
1596 | ||
1597 | l2_offset_u64 = ((uint64_t *)extent->l1_table)[l1_index]; | |
1598 | if (l2_offset_u64 == 0) { | |
1599 | l2_offset = 0; | |
1600 | } else if ((l2_offset_u64 & 0xffffffff00000000) != 0x1000000000000000) { | |
1601 | /* | |
1602 | * Top most nibble is 0x1 if grain table is allocated. | |
1603 | * strict check - top most 4 bytes must be 0x10000000 since max | |
1604 | * supported size is 64TB for disk - so no more than 64TB / 16MB | |
1605 | * grain directories which is smaller than uint32, | |
1606 | * where 16MB is the only supported default grain table coverage. | |
1607 | */ | |
1608 | return VMDK_ERROR; | |
1609 | } else { | |
1610 | l2_offset_u64 = l2_offset_u64 & 0x00000000ffffffff; | |
1611 | l2_offset_u64 = extent->sesparse_l2_tables_offset + | |
1612 | l2_offset_u64 * l2_size_bytes / SECTOR_SIZE; | |
1613 | if (l2_offset_u64 > 0x00000000ffffffff) { | |
1614 | return VMDK_ERROR; | |
1615 | } | |
1616 | l2_offset = (unsigned int)(l2_offset_u64); | |
1617 | } | |
1618 | } else { | |
1619 | assert(extent->entry_size == sizeof(uint32_t)); | |
1620 | l2_offset = ((uint32_t *)extent->l1_table)[l1_index]; | |
1621 | } | |
b3976d3c | 1622 | if (!l2_offset) { |
65f74725 | 1623 | return VMDK_UNALLOC; |
b3976d3c | 1624 | } |
b4b3ab14 | 1625 | for (i = 0; i < L2_CACHE_SIZE; i++) { |
b3976d3c | 1626 | if (l2_offset == extent->l2_cache_offsets[i]) { |
ea2384d3 | 1627 | /* increment the hit count */ |
b3976d3c | 1628 | if (++extent->l2_cache_counts[i] == 0xffffffff) { |
b4b3ab14 | 1629 | for (j = 0; j < L2_CACHE_SIZE; j++) { |
b3976d3c | 1630 | extent->l2_cache_counts[j] >>= 1; |
ea2384d3 FB |
1631 | } |
1632 | } | |
98eb9733 | 1633 | l2_table = (char *)extent->l2_cache + (i * l2_size_bytes); |
ea2384d3 FB |
1634 | goto found; |
1635 | } | |
1636 | } | |
1637 | /* not found: load a new entry in the least used one */ | |
1638 | min_index = 0; | |
1639 | min_count = 0xffffffff; | |
b4b3ab14 | 1640 | for (i = 0; i < L2_CACHE_SIZE; i++) { |
b3976d3c FZ |
1641 | if (extent->l2_cache_counts[i] < min_count) { |
1642 | min_count = extent->l2_cache_counts[i]; | |
ea2384d3 FB |
1643 | min_index = i; |
1644 | } | |
1645 | } | |
98eb9733 | 1646 | l2_table = (char *)extent->l2_cache + (min_index * l2_size_bytes); |
17362398 | 1647 | BLKDBG_CO_EVENT(extent->file, BLKDBG_L2_LOAD); |
a5c4e5be | 1648 | if (bdrv_co_pread(extent->file, |
b3976d3c | 1649 | (int64_t)l2_offset * 512, |
53fb7844 | 1650 | l2_size_bytes, |
a5c4e5be | 1651 | l2_table, 0 |
353a5d84 | 1652 | ) < 0) { |
65f74725 | 1653 | return VMDK_ERROR; |
b3976d3c | 1654 | } |
5f4da8c0 | 1655 | |
b3976d3c FZ |
1656 | extent->l2_cache_offsets[min_index] = l2_offset; |
1657 | extent->l2_cache_counts[min_index] = 1; | |
ea2384d3 | 1658 | found: |
b3976d3c | 1659 | l2_index = ((offset >> 9) / extent->cluster_sectors) % extent->l2_size; |
2821c1cc KW |
1660 | if (m_data) { |
1661 | m_data->l1_index = l1_index; | |
1662 | m_data->l2_index = l2_index; | |
1663 | m_data->l2_offset = l2_offset; | |
1664 | m_data->l2_cache_entry = ((uint32_t *)l2_table) + l2_index; | |
1665 | } | |
630530a6 | 1666 | |
98eb9733 SE |
1667 | if (extent->sesparse) { |
1668 | cluster_sector = le64_to_cpu(((uint64_t *)l2_table)[l2_index]); | |
1669 | switch (cluster_sector & 0xf000000000000000) { | |
1670 | case 0x0000000000000000: | |
1671 | /* unallocated grain */ | |
1672 | if (cluster_sector != 0) { | |
1673 | return VMDK_ERROR; | |
1674 | } | |
1675 | break; | |
1676 | case 0x1000000000000000: | |
1677 | /* scsi-unmapped grain - fallthrough */ | |
1678 | case 0x2000000000000000: | |
1679 | /* zero grain */ | |
1680 | zeroed = true; | |
1681 | break; | |
1682 | case 0x3000000000000000: | |
1683 | /* allocated grain */ | |
1684 | cluster_sector = (((cluster_sector & 0x0fff000000000000) >> 48) | | |
1685 | ((cluster_sector & 0x0000ffffffffffff) << 12)); | |
1686 | cluster_sector = extent->sesparse_clusters_offset + | |
1687 | cluster_sector * extent->cluster_sectors; | |
1688 | break; | |
1689 | default: | |
1690 | return VMDK_ERROR; | |
1691 | } | |
1692 | } else { | |
1693 | cluster_sector = le32_to_cpu(((uint32_t *)l2_table)[l2_index]); | |
1694 | ||
1695 | if (extent->has_zero_grain && cluster_sector == VMDK_GTE_ZEROED) { | |
1696 | zeroed = true; | |
1697 | } | |
14ead646 FZ |
1698 | } |
1699 | ||
c6ac36e1 | 1700 | if (!cluster_sector || zeroed) { |
91b85bd3 | 1701 | if (!allocate) { |
14ead646 | 1702 | return zeroed ? VMDK_ZEROED : VMDK_UNALLOC; |
91b85bd3 | 1703 | } |
98eb9733 | 1704 | assert(!extent->sesparse); |
9949f97e | 1705 | |
a77672ea YCL |
1706 | if (extent->next_cluster_sector >= VMDK_EXTENT_MAX_SECTORS) { |
1707 | return VMDK_ERROR; | |
1708 | } | |
1709 | ||
c6ac36e1 FZ |
1710 | cluster_sector = extent->next_cluster_sector; |
1711 | extent->next_cluster_sector += extent->cluster_sectors; | |
630530a6 | 1712 | |
630530a6 TS |
1713 | /* First of all we write grain itself, to avoid race condition |
1714 | * that may to corrupt the image. | |
1715 | * This problem may occur because of insufficient space on host disk | |
1716 | * or inappropriate VM shutdown. | |
1717 | */ | |
37b1d7d8 | 1718 | ret = get_whole_cluster(bs, extent, cluster_sector * BDRV_SECTOR_SIZE, |
4823cde5 KW |
1719 | offset, skip_start_bytes, skip_end_bytes, |
1720 | zeroed); | |
c6ac36e1 FZ |
1721 | if (ret) { |
1722 | return ret; | |
630530a6 | 1723 | } |
524089bc | 1724 | if (m_data) { |
4dc20e64 | 1725 | m_data->new_allocation = true; |
524089bc | 1726 | } |
ff1afc72 | 1727 | } |
c6ac36e1 | 1728 | *cluster_offset = cluster_sector << BDRV_SECTOR_BITS; |
65f74725 | 1729 | return VMDK_OK; |
ea2384d3 FB |
1730 | } |
1731 | ||
b3976d3c FZ |
1732 | static VmdkExtent *find_extent(BDRVVmdkState *s, |
1733 | int64_t sector_num, VmdkExtent *start_hint) | |
1734 | { | |
1735 | VmdkExtent *extent = start_hint; | |
1736 | ||
1737 | if (!extent) { | |
1738 | extent = &s->extents[0]; | |
1739 | } | |
1740 | while (extent < &s->extents[s->num_extents]) { | |
1741 | if (sector_num < extent->end_sector) { | |
1742 | return extent; | |
1743 | } | |
1744 | extent++; | |
1745 | } | |
1746 | return NULL; | |
1747 | } | |
1748 | ||
a844a2b0 KW |
1749 | static inline uint64_t vmdk_find_offset_in_cluster(VmdkExtent *extent, |
1750 | int64_t offset) | |
1751 | { | |
9be38598 | 1752 | uint64_t extent_begin_offset, extent_relative_offset; |
a844a2b0 KW |
1753 | uint64_t cluster_size = extent->cluster_sectors * BDRV_SECTOR_SIZE; |
1754 | ||
1755 | extent_begin_offset = | |
1756 | (extent->end_sector - extent->sectors) * BDRV_SECTOR_SIZE; | |
1757 | extent_relative_offset = offset - extent_begin_offset; | |
9be38598 | 1758 | return extent_relative_offset % cluster_size; |
a844a2b0 KW |
1759 | } |
1760 | ||
b9b10c35 KW |
1761 | static int coroutine_fn GRAPH_RDLOCK |
1762 | vmdk_co_block_status(BlockDriverState *bs, bool want_zero, | |
1763 | int64_t offset, int64_t bytes, int64_t *pnum, | |
1764 | int64_t *map, BlockDriverState **file) | |
ea2384d3 FB |
1765 | { |
1766 | BDRVVmdkState *s = bs->opaque; | |
b3976d3c | 1767 | int64_t index_in_cluster, n, ret; |
c72080b9 | 1768 | uint64_t cluster_offset; |
b3976d3c FZ |
1769 | VmdkExtent *extent; |
1770 | ||
c72080b9 | 1771 | extent = find_extent(s, offset >> BDRV_SECTOR_BITS, NULL); |
b3976d3c | 1772 | if (!extent) { |
c72080b9 | 1773 | return -EIO; |
b3976d3c | 1774 | } |
f8a2e5e3 | 1775 | qemu_co_mutex_lock(&s->lock); |
c72080b9 | 1776 | ret = get_cluster_offset(bs, extent, NULL, offset, false, &cluster_offset, |
c6ac36e1 | 1777 | 0, 0); |
f8a2e5e3 | 1778 | qemu_co_mutex_unlock(&s->lock); |
14ead646 | 1779 | |
c72080b9 | 1780 | index_in_cluster = vmdk_find_offset_in_cluster(extent, offset); |
4bc74be9 PB |
1781 | switch (ret) { |
1782 | case VMDK_ERROR: | |
1783 | ret = -EIO; | |
1784 | break; | |
1785 | case VMDK_UNALLOC: | |
1786 | ret = 0; | |
1787 | break; | |
1788 | case VMDK_ZEROED: | |
1789 | ret = BDRV_BLOCK_ZERO; | |
1790 | break; | |
1791 | case VMDK_OK: | |
1792 | ret = BDRV_BLOCK_DATA; | |
e0f100f5 | 1793 | if (!extent->compressed) { |
d0a18f10 | 1794 | ret |= BDRV_BLOCK_OFFSET_VALID; |
c72080b9 | 1795 | *map = cluster_offset + index_in_cluster; |
4dd84ac9 HR |
1796 | if (extent->flat) { |
1797 | ret |= BDRV_BLOCK_RECURSE; | |
1798 | } | |
28482891 AD |
1799 | } else { |
1800 | ret |= BDRV_BLOCK_COMPRESSED; | |
4bc74be9 | 1801 | } |
e0f100f5 | 1802 | *file = extent->file->bs; |
4bc74be9 PB |
1803 | break; |
1804 | } | |
91b85bd3 | 1805 | |
c72080b9 EB |
1806 | n = extent->cluster_sectors * BDRV_SECTOR_SIZE - index_in_cluster; |
1807 | *pnum = MIN(n, bytes); | |
b3976d3c | 1808 | return ret; |
ea2384d3 FB |
1809 | } |
1810 | ||
b9b10c35 | 1811 | static int coroutine_fn GRAPH_RDLOCK |
b4df9903 PB |
1812 | vmdk_write_extent(VmdkExtent *extent, int64_t cluster_offset, |
1813 | int64_t offset_in_cluster, QEMUIOVector *qiov, | |
1814 | uint64_t qiov_offset, uint64_t n_bytes, | |
1815 | uint64_t offset) | |
dd3f6ee2 FZ |
1816 | { |
1817 | int ret; | |
2b2c8c5d FZ |
1818 | VmdkGrainMarker *data = NULL; |
1819 | uLongf buf_len; | |
37b1d7d8 | 1820 | QEMUIOVector local_qiov; |
5e82a31e FZ |
1821 | int64_t write_offset; |
1822 | int64_t write_end_sector; | |
dd3f6ee2 | 1823 | |
2b2c8c5d | 1824 | if (extent->compressed) { |
37b1d7d8 KW |
1825 | void *compressed_data; |
1826 | ||
bedb8bb4 HR |
1827 | /* Only whole clusters */ |
1828 | if (offset_in_cluster || | |
1829 | n_bytes > (extent->cluster_sectors * SECTOR_SIZE) || | |
1830 | (n_bytes < (extent->cluster_sectors * SECTOR_SIZE) && | |
1831 | offset + n_bytes != extent->end_sector * SECTOR_SIZE)) | |
1832 | { | |
1833 | ret = -EINVAL; | |
1834 | goto out; | |
1835 | } | |
1836 | ||
2b2c8c5d FZ |
1837 | if (!extent->has_marker) { |
1838 | ret = -EINVAL; | |
1839 | goto out; | |
1840 | } | |
1841 | buf_len = (extent->cluster_sectors << 9) * 2; | |
1842 | data = g_malloc(buf_len + sizeof(VmdkGrainMarker)); | |
37b1d7d8 KW |
1843 | |
1844 | compressed_data = g_malloc(n_bytes); | |
1845 | qemu_iovec_to_buf(qiov, qiov_offset, compressed_data, n_bytes); | |
1846 | ret = compress(data->data, &buf_len, compressed_data, n_bytes); | |
1847 | g_free(compressed_data); | |
1848 | ||
1849 | if (ret != Z_OK || buf_len == 0) { | |
2b2c8c5d FZ |
1850 | ret = -EINVAL; |
1851 | goto out; | |
1852 | } | |
37b1d7d8 | 1853 | |
4545d4f4 QH |
1854 | data->lba = cpu_to_le64(offset >> BDRV_SECTOR_BITS); |
1855 | data->size = cpu_to_le32(buf_len); | |
37b1d7d8 KW |
1856 | |
1857 | n_bytes = buf_len + sizeof(VmdkGrainMarker); | |
199d95b0 | 1858 | qemu_iovec_init_buf(&local_qiov, data, n_bytes); |
23c4b2a8 | 1859 | |
17362398 | 1860 | BLKDBG_CO_EVENT(extent->file, BLKDBG_WRITE_COMPRESSED); |
37b1d7d8 KW |
1861 | } else { |
1862 | qemu_iovec_init(&local_qiov, qiov->niov); | |
1863 | qemu_iovec_concat(&local_qiov, qiov, qiov_offset, n_bytes); | |
23c4b2a8 | 1864 | |
17362398 | 1865 | BLKDBG_CO_EVENT(extent->file, BLKDBG_WRITE_AIO); |
2b2c8c5d | 1866 | } |
37b1d7d8 | 1867 | |
3c363575 | 1868 | write_offset = cluster_offset + offset_in_cluster; |
a03ef88f | 1869 | ret = bdrv_co_pwritev(extent->file, write_offset, n_bytes, |
37b1d7d8 | 1870 | &local_qiov, 0); |
5e82a31e | 1871 | |
37b1d7d8 | 1872 | write_end_sector = DIV_ROUND_UP(write_offset + n_bytes, BDRV_SECTOR_SIZE); |
5e82a31e | 1873 | |
3efffc32 RG |
1874 | if (extent->compressed) { |
1875 | extent->next_cluster_sector = write_end_sector; | |
1876 | } else { | |
1877 | extent->next_cluster_sector = MAX(extent->next_cluster_sector, | |
1878 | write_end_sector); | |
1879 | } | |
5e82a31e | 1880 | |
37b1d7d8 | 1881 | if (ret < 0) { |
dd3f6ee2 FZ |
1882 | goto out; |
1883 | } | |
1884 | ret = 0; | |
1885 | out: | |
2b2c8c5d | 1886 | g_free(data); |
37b1d7d8 KW |
1887 | if (!extent->compressed) { |
1888 | qemu_iovec_destroy(&local_qiov); | |
1889 | } | |
dd3f6ee2 FZ |
1890 | return ret; |
1891 | } | |
1892 | ||
b9b10c35 | 1893 | static int coroutine_fn GRAPH_RDLOCK |
b4df9903 | 1894 | vmdk_read_extent(VmdkExtent *extent, int64_t cluster_offset, |
b9b10c35 | 1895 | int64_t offset_in_cluster, QEMUIOVector *qiov, int bytes) |
dd3f6ee2 FZ |
1896 | { |
1897 | int ret; | |
2b2c8c5d FZ |
1898 | int cluster_bytes, buf_bytes; |
1899 | uint8_t *cluster_buf, *compressed_data; | |
1900 | uint8_t *uncomp_buf; | |
1901 | uint32_t data_len; | |
1902 | VmdkGrainMarker *marker; | |
1903 | uLongf buf_len; | |
1904 | ||
dd3f6ee2 | 1905 | |
2b2c8c5d | 1906 | if (!extent->compressed) { |
17362398 | 1907 | BLKDBG_CO_EVENT(extent->file, BLKDBG_READ_AIO); |
a03ef88f | 1908 | ret = bdrv_co_preadv(extent->file, |
f10cc243 KW |
1909 | cluster_offset + offset_in_cluster, bytes, |
1910 | qiov, 0); | |
1911 | if (ret < 0) { | |
1912 | return ret; | |
2b2c8c5d | 1913 | } |
f10cc243 | 1914 | return 0; |
2b2c8c5d FZ |
1915 | } |
1916 | cluster_bytes = extent->cluster_sectors * 512; | |
1917 | /* Read two clusters in case GrainMarker + compressed data > one cluster */ | |
1918 | buf_bytes = cluster_bytes * 2; | |
1919 | cluster_buf = g_malloc(buf_bytes); | |
1920 | uncomp_buf = g_malloc(cluster_bytes); | |
17362398 | 1921 | BLKDBG_CO_EVENT(extent->file, BLKDBG_READ_COMPRESSED); |
a5c4e5be AF |
1922 | ret = bdrv_co_pread(extent->file, cluster_offset, buf_bytes, cluster_buf, |
1923 | 0); | |
2b2c8c5d FZ |
1924 | if (ret < 0) { |
1925 | goto out; | |
1926 | } | |
1927 | compressed_data = cluster_buf; | |
1928 | buf_len = cluster_bytes; | |
1929 | data_len = cluster_bytes; | |
1930 | if (extent->has_marker) { | |
1931 | marker = (VmdkGrainMarker *)cluster_buf; | |
1932 | compressed_data = marker->data; | |
1933 | data_len = le32_to_cpu(marker->size); | |
1934 | } | |
1935 | if (!data_len || data_len > buf_bytes) { | |
1936 | ret = -EINVAL; | |
1937 | goto out; | |
1938 | } | |
1939 | ret = uncompress(uncomp_buf, &buf_len, compressed_data, data_len); | |
1940 | if (ret != Z_OK) { | |
1941 | ret = -EINVAL; | |
1942 | goto out; | |
1943 | ||
1944 | } | |
1945 | if (offset_in_cluster < 0 || | |
f10cc243 | 1946 | offset_in_cluster + bytes > buf_len) { |
2b2c8c5d FZ |
1947 | ret = -EINVAL; |
1948 | goto out; | |
dd3f6ee2 | 1949 | } |
f10cc243 | 1950 | qemu_iovec_from_buf(qiov, 0, uncomp_buf + offset_in_cluster, bytes); |
2b2c8c5d FZ |
1951 | ret = 0; |
1952 | ||
1953 | out: | |
1954 | g_free(uncomp_buf); | |
1955 | g_free(cluster_buf); | |
1956 | return ret; | |
dd3f6ee2 FZ |
1957 | } |
1958 | ||
b9b10c35 | 1959 | static int coroutine_fn GRAPH_RDLOCK |
f7ef38dd VSO |
1960 | vmdk_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes, |
1961 | QEMUIOVector *qiov, BdrvRequestFlags flags) | |
ea2384d3 FB |
1962 | { |
1963 | BDRVVmdkState *s = bs->opaque; | |
b3976d3c | 1964 | int ret; |
f10cc243 | 1965 | uint64_t n_bytes, offset_in_cluster; |
b3976d3c | 1966 | VmdkExtent *extent = NULL; |
f10cc243 | 1967 | QEMUIOVector local_qiov; |
ea2384d3 | 1968 | uint64_t cluster_offset; |
f10cc243 | 1969 | uint64_t bytes_done = 0; |
5f4da8c0 | 1970 | |
f10cc243 KW |
1971 | qemu_iovec_init(&local_qiov, qiov->niov); |
1972 | qemu_co_mutex_lock(&s->lock); | |
1973 | ||
1974 | while (bytes > 0) { | |
1975 | extent = find_extent(s, offset >> BDRV_SECTOR_BITS, extent); | |
b3976d3c | 1976 | if (!extent) { |
f10cc243 KW |
1977 | ret = -EIO; |
1978 | goto fail; | |
b3976d3c | 1979 | } |
c6ac36e1 | 1980 | ret = get_cluster_offset(bs, extent, NULL, |
f10cc243 KW |
1981 | offset, false, &cluster_offset, 0, 0); |
1982 | offset_in_cluster = vmdk_find_offset_in_cluster(extent, offset); | |
1983 | ||
1984 | n_bytes = MIN(bytes, extent->cluster_sectors * BDRV_SECTOR_SIZE | |
1985 | - offset_in_cluster); | |
1986 | ||
14ead646 | 1987 | if (ret != VMDK_OK) { |
91b85bd3 | 1988 | /* if not allocated, try to read from parent image, if exist */ |
760e0063 | 1989 | if (bs->backing && ret != VMDK_ZEROED) { |
ae261c86 | 1990 | if (!vmdk_is_cid_valid(bs)) { |
f10cc243 KW |
1991 | ret = -EINVAL; |
1992 | goto fail; | |
ae261c86 | 1993 | } |
f10cc243 KW |
1994 | |
1995 | qemu_iovec_reset(&local_qiov); | |
1996 | qemu_iovec_concat(&local_qiov, qiov, bytes_done, n_bytes); | |
1997 | ||
23c4b2a8 | 1998 | /* qcow2 emits this on bs->file instead of bs->backing */ |
17362398 | 1999 | BLKDBG_CO_EVENT(bs->file, BLKDBG_READ_BACKING_AIO); |
a03ef88f | 2000 | ret = bdrv_co_preadv(bs->backing, offset, n_bytes, |
f10cc243 | 2001 | &local_qiov, 0); |
ae261c86 | 2002 | if (ret < 0) { |
f10cc243 | 2003 | goto fail; |
ae261c86 | 2004 | } |
5f4da8c0 | 2005 | } else { |
f10cc243 | 2006 | qemu_iovec_memset(qiov, bytes_done, 0, n_bytes); |
5f4da8c0 | 2007 | } |
ea2384d3 | 2008 | } else { |
f10cc243 KW |
2009 | qemu_iovec_reset(&local_qiov); |
2010 | qemu_iovec_concat(&local_qiov, qiov, bytes_done, n_bytes); | |
2011 | ||
2012 | ret = vmdk_read_extent(extent, cluster_offset, offset_in_cluster, | |
2013 | &local_qiov, n_bytes); | |
dd3f6ee2 | 2014 | if (ret) { |
f10cc243 | 2015 | goto fail; |
7fa60fa3 | 2016 | } |
ea2384d3 | 2017 | } |
f10cc243 KW |
2018 | bytes -= n_bytes; |
2019 | offset += n_bytes; | |
2020 | bytes_done += n_bytes; | |
ea2384d3 | 2021 | } |
ea2384d3 | 2022 | |
f10cc243 KW |
2023 | ret = 0; |
2024 | fail: | |
2914caa0 | 2025 | qemu_co_mutex_unlock(&s->lock); |
f10cc243 KW |
2026 | qemu_iovec_destroy(&local_qiov); |
2027 | ||
2914caa0 PB |
2028 | return ret; |
2029 | } | |
2030 | ||
cdeaf1f1 FZ |
2031 | /** |
2032 | * vmdk_write: | |
2033 | * @zeroed: buf is ignored (data is zero), use zeroed_grain GTE feature | |
8e507243 FZ |
2034 | * if possible, otherwise return -ENOTSUP. |
2035 | * @zero_dry_run: used for zeroed == true only, don't update L2 table, just try | |
2036 | * with each cluster. By dry run we can find if the zero write | |
2037 | * is possible without modifying image data. | |
cdeaf1f1 FZ |
2038 | * |
2039 | * Returns: error code with 0 for success. | |
2040 | */ | |
b9b10c35 KW |
2041 | static int coroutine_fn GRAPH_RDLOCK |
2042 | vmdk_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes, | |
2043 | QEMUIOVector *qiov, bool zeroed, bool zero_dry_run) | |
ea2384d3 | 2044 | { |
ff1afc72 | 2045 | BDRVVmdkState *s = bs->opaque; |
b3976d3c | 2046 | VmdkExtent *extent = NULL; |
585ea0c8 | 2047 | int ret; |
37b1d7d8 | 2048 | int64_t offset_in_cluster, n_bytes; |
ff1afc72 | 2049 | uint64_t cluster_offset; |
37b1d7d8 | 2050 | uint64_t bytes_done = 0; |
b3976d3c | 2051 | VmdkMetaData m_data; |
ff1afc72 | 2052 | |
37b1d7d8 KW |
2053 | if (DIV_ROUND_UP(offset, BDRV_SECTOR_SIZE) > bs->total_sectors) { |
2054 | error_report("Wrong offset: offset=0x%" PRIx64 | |
9af9e0fe | 2055 | " total_sectors=0x%" PRIx64, |
37b1d7d8 | 2056 | offset, bs->total_sectors); |
7fa60fa3 | 2057 | return -EIO; |
630530a6 TS |
2058 | } |
2059 | ||
37b1d7d8 KW |
2060 | while (bytes > 0) { |
2061 | extent = find_extent(s, offset >> BDRV_SECTOR_BITS, extent); | |
b3976d3c FZ |
2062 | if (!extent) { |
2063 | return -EIO; | |
2064 | } | |
98eb9733 SE |
2065 | if (extent->sesparse) { |
2066 | return -ENOTSUP; | |
2067 | } | |
37b1d7d8 KW |
2068 | offset_in_cluster = vmdk_find_offset_in_cluster(extent, offset); |
2069 | n_bytes = MIN(bytes, extent->cluster_sectors * BDRV_SECTOR_SIZE | |
2070 | - offset_in_cluster); | |
2071 | ||
2072 | ret = get_cluster_offset(bs, extent, &m_data, offset, | |
c6ac36e1 | 2073 | !(extent->compressed || zeroed), |
37b1d7d8 KW |
2074 | &cluster_offset, offset_in_cluster, |
2075 | offset_in_cluster + n_bytes); | |
2b2c8c5d | 2076 | if (extent->compressed) { |
65f74725 | 2077 | if (ret == VMDK_OK) { |
2b2c8c5d | 2078 | /* Refuse write to allocated cluster for streamOptimized */ |
4823970b FZ |
2079 | error_report("Could not write to allocated cluster" |
2080 | " for streamOptimized"); | |
2b2c8c5d | 2081 | return -EIO; |
2821c1cc | 2082 | } else if (!zeroed) { |
2b2c8c5d | 2083 | /* allocate */ |
37b1d7d8 | 2084 | ret = get_cluster_offset(bs, extent, &m_data, offset, |
c6ac36e1 | 2085 | true, &cluster_offset, 0, 0); |
2b2c8c5d FZ |
2086 | } |
2087 | } | |
cdeaf1f1 | 2088 | if (ret == VMDK_ERROR) { |
91b85bd3 | 2089 | return -EINVAL; |
b3976d3c | 2090 | } |
cdeaf1f1 FZ |
2091 | if (zeroed) { |
2092 | /* Do zeroed write, buf is ignored */ | |
2093 | if (extent->has_zero_grain && | |
37b1d7d8 KW |
2094 | offset_in_cluster == 0 && |
2095 | n_bytes >= extent->cluster_sectors * BDRV_SECTOR_SIZE) { | |
2096 | n_bytes = extent->cluster_sectors * BDRV_SECTOR_SIZE; | |
78cae78d | 2097 | if (!zero_dry_run && ret != VMDK_ZEROED) { |
cdeaf1f1 | 2098 | /* update L2 tables */ |
c6ac36e1 FZ |
2099 | if (vmdk_L2update(extent, &m_data, VMDK_GTE_ZEROED) |
2100 | != VMDK_OK) { | |
cdeaf1f1 FZ |
2101 | return -EIO; |
2102 | } | |
2103 | } | |
2104 | } else { | |
2105 | return -ENOTSUP; | |
2106 | } | |
2107 | } else { | |
37b1d7d8 KW |
2108 | ret = vmdk_write_extent(extent, cluster_offset, offset_in_cluster, |
2109 | qiov, bytes_done, n_bytes, offset); | |
cdeaf1f1 FZ |
2110 | if (ret) { |
2111 | return ret; | |
2112 | } | |
4dc20e64 | 2113 | if (m_data.new_allocation) { |
cdeaf1f1 | 2114 | /* update L2 tables */ |
c6ac36e1 FZ |
2115 | if (vmdk_L2update(extent, &m_data, |
2116 | cluster_offset >> BDRV_SECTOR_BITS) | |
2117 | != VMDK_OK) { | |
cdeaf1f1 FZ |
2118 | return -EIO; |
2119 | } | |
b3976d3c | 2120 | } |
630530a6 | 2121 | } |
37b1d7d8 KW |
2122 | bytes -= n_bytes; |
2123 | offset += n_bytes; | |
2124 | bytes_done += n_bytes; | |
5f4da8c0 | 2125 | |
ae261c86 FZ |
2126 | /* update CID on the first write every time the virtual disk is |
2127 | * opened */ | |
69b4d86d | 2128 | if (!s->cid_updated) { |
e5dc64b8 | 2129 | ret = vmdk_write_cid(bs, g_random_int()); |
99f1835d KW |
2130 | if (ret < 0) { |
2131 | return ret; | |
2132 | } | |
69b4d86d | 2133 | s->cid_updated = true; |
5f4da8c0 | 2134 | } |
ff1afc72 FB |
2135 | } |
2136 | return 0; | |
ea2384d3 FB |
2137 | } |
2138 | ||
b9b10c35 | 2139 | static int coroutine_fn GRAPH_RDLOCK |
e75abeda VSO |
2140 | vmdk_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes, |
2141 | QEMUIOVector *qiov, BdrvRequestFlags flags) | |
e183ef75 PB |
2142 | { |
2143 | int ret; | |
2144 | BDRVVmdkState *s = bs->opaque; | |
2145 | qemu_co_mutex_lock(&s->lock); | |
37b1d7d8 | 2146 | ret = vmdk_pwritev(bs, offset, bytes, qiov, false, false); |
cdeaf1f1 FZ |
2147 | qemu_co_mutex_unlock(&s->lock); |
2148 | return ret; | |
2149 | } | |
2150 | ||
7b1fb72e | 2151 | static int coroutine_fn GRAPH_RDLOCK |
e75abeda VSO |
2152 | vmdk_co_pwritev_compressed(BlockDriverState *bs, int64_t offset, int64_t bytes, |
2153 | QEMUIOVector *qiov) | |
ba0ad89e | 2154 | { |
51b3c6b7 YCL |
2155 | if (bytes == 0) { |
2156 | /* The caller will write bytes 0 to signal EOF. | |
2157 | * When receive it, we align EOF to a sector boundary. */ | |
2158 | BDRVVmdkState *s = bs->opaque; | |
2159 | int i, ret; | |
2160 | int64_t length; | |
2161 | ||
2162 | for (i = 0; i < s->num_extents; i++) { | |
0af02bd1 | 2163 | length = bdrv_co_getlength(s->extents[i].file->bs); |
51b3c6b7 YCL |
2164 | if (length < 0) { |
2165 | return length; | |
2166 | } | |
2167 | length = QEMU_ALIGN_UP(length, BDRV_SECTOR_SIZE); | |
a5c4e5be AF |
2168 | ret = bdrv_co_truncate(s->extents[i].file, length, false, |
2169 | PREALLOC_MODE_OFF, 0, NULL); | |
51b3c6b7 YCL |
2170 | if (ret < 0) { |
2171 | return ret; | |
2172 | } | |
2173 | } | |
2174 | return 0; | |
2175 | } | |
b2c622d3 | 2176 | return vmdk_co_pwritev(bs, offset, bytes, qiov, 0); |
ba0ad89e FZ |
2177 | } |
2178 | ||
b9b10c35 KW |
2179 | static int coroutine_fn GRAPH_RDLOCK |
2180 | vmdk_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset, int64_t bytes, | |
2181 | BdrvRequestFlags flags) | |
cdeaf1f1 FZ |
2182 | { |
2183 | int ret; | |
2184 | BDRVVmdkState *s = bs->opaque; | |
37b1d7d8 | 2185 | |
cdeaf1f1 | 2186 | qemu_co_mutex_lock(&s->lock); |
8e507243 FZ |
2187 | /* write zeroes could fail if sectors not aligned to cluster, test it with |
2188 | * dry_run == true before really updating image */ | |
37b1d7d8 | 2189 | ret = vmdk_pwritev(bs, offset, bytes, NULL, true, true); |
cdeaf1f1 | 2190 | if (!ret) { |
37b1d7d8 | 2191 | ret = vmdk_pwritev(bs, offset, bytes, NULL, true, false); |
cdeaf1f1 | 2192 | } |
e183ef75 PB |
2193 | qemu_co_mutex_unlock(&s->lock); |
2194 | return ret; | |
2195 | } | |
2196 | ||
28944f99 | 2197 | static int coroutine_fn GRAPH_UNLOCKED |
4db7ba3b KW |
2198 | vmdk_init_extent(BlockBackend *blk, int64_t filesize, bool flat, bool compress, |
2199 | bool zeroed_grain, Error **errp) | |
8979b227 | 2200 | { |
f66fd6c3 | 2201 | int ret, i; |
8979b227 | 2202 | VMDK4Header header; |
917703c1 FZ |
2203 | uint32_t tmp, magic, grains, gd_sectors, gt_size, gt_count; |
2204 | uint32_t *gd_buf = NULL; | |
2205 | int gd_buf_size; | |
0e7e1989 | 2206 | |
f66fd6c3 | 2207 | if (flat) { |
28944f99 | 2208 | ret = blk_co_truncate(blk, filesize, false, PREALLOC_MODE_OFF, 0, errp); |
f66fd6c3 | 2209 | goto exit; |
5f4da8c0 | 2210 | } |
8979b227 FB |
2211 | magic = cpu_to_be32(VMDK4_MAGIC); |
2212 | memset(&header, 0, sizeof(header)); | |
d62d9dc4 FZ |
2213 | if (compress) { |
2214 | header.version = 3; | |
2215 | } else if (zeroed_grain) { | |
2216 | header.version = 2; | |
2217 | } else { | |
2218 | header.version = 1; | |
2219 | } | |
95b0aa42 | 2220 | header.flags = VMDK4_FLAG_RGD | VMDK4_FLAG_NL_DETECT |
69e0b6df FZ |
2221 | | (compress ? VMDK4_FLAG_COMPRESS | VMDK4_FLAG_MARKER : 0) |
2222 | | (zeroed_grain ? VMDK4_FLAG_ZERO_GRAIN : 0); | |
6c031aac | 2223 | header.compressAlgorithm = compress ? VMDK4_COMPRESSION_DEFLATE : 0; |
917703c1 | 2224 | header.capacity = filesize / BDRV_SECTOR_SIZE; |
16372ff0 | 2225 | header.granularity = 128; |
917703c1 | 2226 | header.num_gtes_per_gt = BDRV_SECTOR_SIZE; |
8979b227 | 2227 | |
917703c1 FZ |
2228 | grains = DIV_ROUND_UP(filesize / BDRV_SECTOR_SIZE, header.granularity); |
2229 | gt_size = DIV_ROUND_UP(header.num_gtes_per_gt * sizeof(uint32_t), | |
2230 | BDRV_SECTOR_SIZE); | |
2231 | gt_count = DIV_ROUND_UP(grains, header.num_gtes_per_gt); | |
2232 | gd_sectors = DIV_ROUND_UP(gt_count * sizeof(uint32_t), BDRV_SECTOR_SIZE); | |
8979b227 FB |
2233 | |
2234 | header.desc_offset = 1; | |
2235 | header.desc_size = 20; | |
2236 | header.rgd_offset = header.desc_offset + header.desc_size; | |
917703c1 | 2237 | header.gd_offset = header.rgd_offset + gd_sectors + (gt_size * gt_count); |
8979b227 | 2238 | header.grain_offset = |
917703c1 FZ |
2239 | ROUND_UP(header.gd_offset + gd_sectors + (gt_size * gt_count), |
2240 | header.granularity); | |
16372ff0 AG |
2241 | /* swap endianness for all header fields */ |
2242 | header.version = cpu_to_le32(header.version); | |
2243 | header.flags = cpu_to_le32(header.flags); | |
2244 | header.capacity = cpu_to_le64(header.capacity); | |
2245 | header.granularity = cpu_to_le64(header.granularity); | |
ca8804ce | 2246 | header.num_gtes_per_gt = cpu_to_le32(header.num_gtes_per_gt); |
8979b227 FB |
2247 | header.desc_offset = cpu_to_le64(header.desc_offset); |
2248 | header.desc_size = cpu_to_le64(header.desc_size); | |
2249 | header.rgd_offset = cpu_to_le64(header.rgd_offset); | |
2250 | header.gd_offset = cpu_to_le64(header.gd_offset); | |
2251 | header.grain_offset = cpu_to_le64(header.grain_offset); | |
6c031aac | 2252 | header.compressAlgorithm = cpu_to_le16(header.compressAlgorithm); |
8979b227 FB |
2253 | |
2254 | header.check_bytes[0] = 0xa; | |
2255 | header.check_bytes[1] = 0x20; | |
2256 | header.check_bytes[2] = 0xd; | |
2257 | header.check_bytes[3] = 0xa; | |
3b46e624 TS |
2258 | |
2259 | /* write all the data */ | |
28944f99 | 2260 | ret = blk_co_pwrite(blk, 0, sizeof(magic), &magic, 0); |
917703c1 | 2261 | if (ret < 0) { |
c6bd8c70 | 2262 | error_setg(errp, QERR_IO_ERROR); |
1640366c KS |
2263 | goto exit; |
2264 | } | |
28944f99 | 2265 | ret = blk_co_pwrite(blk, sizeof(magic), sizeof(header), &header, 0); |
917703c1 | 2266 | if (ret < 0) { |
c6bd8c70 | 2267 | error_setg(errp, QERR_IO_ERROR); |
1640366c KS |
2268 | goto exit; |
2269 | } | |
8979b227 | 2270 | |
28944f99 PB |
2271 | ret = blk_co_truncate(blk, le64_to_cpu(header.grain_offset) << 9, false, |
2272 | PREALLOC_MODE_OFF, 0, errp); | |
1640366c | 2273 | if (ret < 0) { |
1640366c KS |
2274 | goto exit; |
2275 | } | |
8979b227 FB |
2276 | |
2277 | /* write grain directory */ | |
917703c1 FZ |
2278 | gd_buf_size = gd_sectors * BDRV_SECTOR_SIZE; |
2279 | gd_buf = g_malloc0(gd_buf_size); | |
2280 | for (i = 0, tmp = le64_to_cpu(header.rgd_offset) + gd_sectors; | |
1640366c | 2281 | i < gt_count; i++, tmp += gt_size) { |
917703c1 FZ |
2282 | gd_buf[i] = cpu_to_le32(tmp); |
2283 | } | |
28944f99 PB |
2284 | ret = blk_co_pwrite(blk, le64_to_cpu(header.rgd_offset) * BDRV_SECTOR_SIZE, |
2285 | gd_buf_size, gd_buf, 0); | |
917703c1 | 2286 | if (ret < 0) { |
c6bd8c70 | 2287 | error_setg(errp, QERR_IO_ERROR); |
917703c1 | 2288 | goto exit; |
1640366c | 2289 | } |
3b46e624 | 2290 | |
8979b227 | 2291 | /* write backup grain directory */ |
917703c1 | 2292 | for (i = 0, tmp = le64_to_cpu(header.gd_offset) + gd_sectors; |
1640366c | 2293 | i < gt_count; i++, tmp += gt_size) { |
917703c1 FZ |
2294 | gd_buf[i] = cpu_to_le32(tmp); |
2295 | } | |
28944f99 PB |
2296 | ret = blk_co_pwrite(blk, le64_to_cpu(header.gd_offset) * BDRV_SECTOR_SIZE, |
2297 | gd_buf_size, gd_buf, 0); | |
917703c1 | 2298 | if (ret < 0) { |
c6bd8c70 | 2299 | error_setg(errp, QERR_IO_ERROR); |
1640366c | 2300 | } |
8979b227 | 2301 | |
f66fd6c3 | 2302 | ret = 0; |
5be28490 FZ |
2303 | exit: |
2304 | g_free(gd_buf); | |
2305 | return ret; | |
2306 | } | |
2307 | ||
4db7ba3b | 2308 | static int coroutine_fn GRAPH_UNLOCKED |
4ec8df01 KW |
2309 | vmdk_create_extent(const char *filename, int64_t filesize, bool flat, |
2310 | bool compress, bool zeroed_grain, BlockBackend **pbb, | |
2311 | QemuOpts *opts, Error **errp) | |
5be28490 FZ |
2312 | { |
2313 | int ret; | |
2314 | BlockBackend *blk = NULL; | |
5be28490 | 2315 | |
2475a0d0 | 2316 | ret = bdrv_co_create_file(filename, opts, errp); |
5be28490 | 2317 | if (ret < 0) { |
5be28490 FZ |
2318 | goto exit; |
2319 | } | |
2320 | ||
882f202e KW |
2321 | blk = blk_co_new_open(filename, NULL, NULL, |
2322 | BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL, | |
2323 | errp); | |
5be28490 | 2324 | if (blk == NULL) { |
5be28490 FZ |
2325 | ret = -EIO; |
2326 | goto exit; | |
2327 | } | |
2328 | ||
2329 | blk_set_allow_write_beyond_eof(blk, true); | |
2330 | ||
2331 | ret = vmdk_init_extent(blk, filesize, flat, compress, zeroed_grain, errp); | |
917703c1 | 2332 | exit: |
c4bea169 | 2333 | if (blk) { |
5be28490 FZ |
2334 | if (pbb) { |
2335 | *pbb = blk; | |
2336 | } else { | |
b2ab5f54 | 2337 | blk_co_unref(blk); |
5be28490 FZ |
2338 | blk = NULL; |
2339 | } | |
917703c1 | 2340 | } |
f66fd6c3 FZ |
2341 | return ret; |
2342 | } | |
2343 | ||
2344 | static int filename_decompose(const char *filename, char *path, char *prefix, | |
4823970b | 2345 | char *postfix, size_t buf_len, Error **errp) |
f66fd6c3 FZ |
2346 | { |
2347 | const char *p, *q; | |
2348 | ||
2349 | if (filename == NULL || !strlen(filename)) { | |
4823970b | 2350 | error_setg(errp, "No filename provided"); |
65f74725 | 2351 | return VMDK_ERROR; |
f66fd6c3 FZ |
2352 | } |
2353 | p = strrchr(filename, '/'); | |
2354 | if (p == NULL) { | |
2355 | p = strrchr(filename, '\\'); | |
2356 | } | |
2357 | if (p == NULL) { | |
2358 | p = strrchr(filename, ':'); | |
2359 | } | |
2360 | if (p != NULL) { | |
2361 | p++; | |
2362 | if (p - filename >= buf_len) { | |
65f74725 | 2363 | return VMDK_ERROR; |
f66fd6c3 FZ |
2364 | } |
2365 | pstrcpy(path, p - filename + 1, filename); | |
2366 | } else { | |
2367 | p = filename; | |
2368 | path[0] = '\0'; | |
2369 | } | |
2370 | q = strrchr(p, '.'); | |
2371 | if (q == NULL) { | |
2372 | pstrcpy(prefix, buf_len, p); | |
2373 | postfix[0] = '\0'; | |
2374 | } else { | |
2375 | if (q - p >= buf_len) { | |
65f74725 | 2376 | return VMDK_ERROR; |
f66fd6c3 FZ |
2377 | } |
2378 | pstrcpy(prefix, q - p + 1, p); | |
2379 | pstrcpy(postfix, buf_len, q); | |
2380 | } | |
65f74725 | 2381 | return VMDK_OK; |
f66fd6c3 FZ |
2382 | } |
2383 | ||
3015372d FZ |
2384 | /* |
2385 | * idx == 0: get or create the descriptor file (also the image file if in a | |
2386 | * non-split format. | |
2387 | * idx >= 1: get the n-th extent if in a split subformat | |
2388 | */ | |
4db7ba3b | 2389 | typedef BlockBackend * coroutine_fn GRAPH_UNLOCKED_PTR |
4ec8df01 KW |
2390 | (*vmdk_create_extent_fn)(int64_t size, int idx, bool flat, bool split, |
2391 | bool compress, bool zeroed_grain, void *opaque, | |
2392 | Error **errp); | |
3015372d FZ |
2393 | |
2394 | static void vmdk_desc_add_extent(GString *desc, | |
2395 | const char *extent_line_fmt, | |
2396 | int64_t size, const char *filename) | |
2397 | { | |
2398 | char *basename = g_path_get_basename(filename); | |
2399 | ||
2400 | g_string_append_printf(desc, extent_line_fmt, | |
2401 | DIV_ROUND_UP(size, BDRV_SECTOR_SIZE), basename); | |
2402 | g_free(basename); | |
2403 | } | |
2404 | ||
4db7ba3b | 2405 | static int coroutine_fn GRAPH_UNLOCKED |
4ec8df01 KW |
2406 | vmdk_co_do_create(int64_t size, |
2407 | BlockdevVmdkSubformat subformat, | |
2408 | BlockdevVmdkAdapterType adapter_type, | |
2409 | const char *backing_file, | |
2410 | const char *hw_version, | |
2411 | const char *toolsversion, | |
2412 | bool compat6, | |
2413 | bool zeroed_grain, | |
2414 | vmdk_create_extent_fn extent_fn, | |
2415 | void *opaque, | |
2416 | Error **errp) | |
f66fd6c3 | 2417 | { |
3015372d FZ |
2418 | int extent_idx; |
2419 | BlockBackend *blk = NULL; | |
4a960ece | 2420 | BlockBackend *extent_blk; |
c13959c7 | 2421 | Error *local_err = NULL; |
af057fe7 | 2422 | char *desc = NULL; |
f66fd6c3 | 2423 | int ret = 0; |
6c031aac | 2424 | bool flat, split, compress; |
af057fe7 | 2425 | GString *ext_desc_lines; |
f66fd6c3 | 2426 | const int64_t split_size = 0x80000000; /* VMDK has constant split size */ |
3015372d FZ |
2427 | int64_t extent_size; |
2428 | int64_t created_size = 0; | |
2429 | const char *extent_line_fmt; | |
fe206562 | 2430 | char *parent_desc_line = g_malloc0(BUF_SIZE); |
f66fd6c3 | 2431 | uint32_t parent_cid = 0xffffffff; |
7f2039f6 | 2432 | uint32_t number_heads = 16; |
917703c1 | 2433 | uint32_t desc_offset = 0, desc_len; |
f66fd6c3 FZ |
2434 | const char desc_template[] = |
2435 | "# Disk DescriptorFile\n" | |
2436 | "version=1\n" | |
9b17031a FZ |
2437 | "CID=%" PRIx32 "\n" |
2438 | "parentCID=%" PRIx32 "\n" | |
f66fd6c3 FZ |
2439 | "createType=\"%s\"\n" |
2440 | "%s" | |
2441 | "\n" | |
2442 | "# Extent description\n" | |
2443 | "%s" | |
2444 | "\n" | |
2445 | "# The Disk Data Base\n" | |
2446 | "#DDB\n" | |
2447 | "\n" | |
f249924e | 2448 | "ddb.virtualHWVersion = \"%s\"\n" |
f66fd6c3 | 2449 | "ddb.geometry.cylinders = \"%" PRId64 "\"\n" |
4ab9dab5 | 2450 | "ddb.geometry.heads = \"%" PRIu32 "\"\n" |
f66fd6c3 | 2451 | "ddb.geometry.sectors = \"63\"\n" |
f3d43dfd TW |
2452 | "ddb.adapterType = \"%s\"\n" |
2453 | "ddb.toolsVersion = \"%s\"\n"; | |
f66fd6c3 | 2454 | |
af057fe7 FZ |
2455 | ext_desc_lines = g_string_new(NULL); |
2456 | ||
f66fd6c3 | 2457 | /* Read out options */ |
3015372d FZ |
2458 | if (compat6) { |
2459 | if (hw_version) { | |
f249924e JK |
2460 | error_setg(errp, |
2461 | "compat6 cannot be enabled with hwversion set"); | |
2462 | ret = -EINVAL; | |
2463 | goto exit; | |
2464 | } | |
3015372d | 2465 | hw_version = "6"; |
5820f1da | 2466 | } |
3015372d FZ |
2467 | if (!hw_version) { |
2468 | hw_version = "4"; | |
f66fd6c3 | 2469 | } |
f3d43dfd TW |
2470 | if (!toolsversion) { |
2471 | toolsversion = "2147483647"; | |
2472 | } | |
5820f1da | 2473 | |
3015372d | 2474 | if (adapter_type != BLOCKDEV_VMDK_ADAPTER_TYPE_IDE) { |
7f2039f6 OP |
2475 | /* that's the number of heads with which vmware operates when |
2476 | creating, exporting, etc. vmdk files with a non-ide adapter type */ | |
2477 | number_heads = 255; | |
2478 | } | |
3015372d FZ |
2479 | split = (subformat == BLOCKDEV_VMDK_SUBFORMAT_TWOGBMAXEXTENTFLAT) || |
2480 | (subformat == BLOCKDEV_VMDK_SUBFORMAT_TWOGBMAXEXTENTSPARSE); | |
2481 | flat = (subformat == BLOCKDEV_VMDK_SUBFORMAT_MONOLITHICFLAT) || | |
2482 | (subformat == BLOCKDEV_VMDK_SUBFORMAT_TWOGBMAXEXTENTFLAT); | |
2483 | compress = subformat == BLOCKDEV_VMDK_SUBFORMAT_STREAMOPTIMIZED; | |
2484 | ||
f66fd6c3 | 2485 | if (flat) { |
3015372d | 2486 | extent_line_fmt = "RW %" PRId64 " FLAT \"%s\" 0\n"; |
f66fd6c3 | 2487 | } else { |
3015372d | 2488 | extent_line_fmt = "RW %" PRId64 " SPARSE \"%s\"\n"; |
f66fd6c3 FZ |
2489 | } |
2490 | if (flat && backing_file) { | |
4823970b | 2491 | error_setg(errp, "Flat image can't have backing file"); |
af057fe7 FZ |
2492 | ret = -ENOTSUP; |
2493 | goto exit; | |
f66fd6c3 | 2494 | } |
52c8d629 FZ |
2495 | if (flat && zeroed_grain) { |
2496 | error_setg(errp, "Flat image can't enable zeroed grain"); | |
af057fe7 FZ |
2497 | ret = -ENOTSUP; |
2498 | goto exit; | |
52c8d629 | 2499 | } |
3015372d FZ |
2500 | |
2501 | /* Create extents */ | |
2502 | if (split) { | |
2503 | extent_size = split_size; | |
2504 | } else { | |
2505 | extent_size = size; | |
2506 | } | |
2507 | if (!split && !flat) { | |
2508 | created_size = extent_size; | |
2509 | } else { | |
2510 | created_size = 0; | |
2511 | } | |
2512 | /* Get the descriptor file BDS */ | |
2513 | blk = extent_fn(created_size, 0, flat, split, compress, zeroed_grain, | |
2514 | opaque, errp); | |
2515 | if (!blk) { | |
2516 | ret = -EIO; | |
2517 | goto exit; | |
2518 | } | |
2519 | if (!split && !flat) { | |
2520 | vmdk_desc_add_extent(ext_desc_lines, extent_line_fmt, created_size, | |
2521 | blk_bs(blk)->filename); | |
2522 | } | |
2523 | ||
f66fd6c3 | 2524 | if (backing_file) { |
3015372d | 2525 | BlockBackend *backing; |
645ae7d8 HR |
2526 | char *full_backing = |
2527 | bdrv_get_full_backing_filename_from_filename(blk_bs(blk)->filename, | |
2528 | backing_file, | |
2529 | &local_err); | |
1085daf9 | 2530 | if (local_err) { |
1085daf9 HR |
2531 | error_propagate(errp, local_err); |
2532 | ret = -ENOENT; | |
2533 | goto exit; | |
2534 | } | |
645ae7d8 | 2535 | assert(full_backing); |
c4bea169 | 2536 | |
882f202e KW |
2537 | backing = blk_co_new_open(full_backing, NULL, NULL, |
2538 | BDRV_O_NO_BACKING, errp); | |
1085daf9 | 2539 | g_free(full_backing); |
3015372d | 2540 | if (backing == NULL) { |
c4bea169 | 2541 | ret = -EIO; |
af057fe7 | 2542 | goto exit; |
f66fd6c3 | 2543 | } |
3015372d FZ |
2544 | if (strcmp(blk_bs(backing)->drv->format_name, "vmdk")) { |
2545 | error_setg(errp, "Invalid backing file format: %s. Must be vmdk", | |
2546 | blk_bs(backing)->drv->format_name); | |
b2ab5f54 | 2547 | blk_co_unref(backing); |
af057fe7 FZ |
2548 | ret = -EINVAL; |
2549 | goto exit; | |
f66fd6c3 | 2550 | } |
3015372d | 2551 | ret = vmdk_read_cid(blk_bs(backing), 0, &parent_cid); |
b2ab5f54 | 2552 | blk_co_unref(backing); |
9877860e | 2553 | if (ret) { |
3015372d | 2554 | error_setg(errp, "Failed to read parent CID"); |
9877860e PM |
2555 | goto exit; |
2556 | } | |
fe206562 | 2557 | snprintf(parent_desc_line, BUF_SIZE, |
8ed610a1 | 2558 | "parentFileNameHint=\"%s\"", backing_file); |
f66fd6c3 | 2559 | } |
3015372d FZ |
2560 | extent_idx = 1; |
2561 | while (created_size < size) { | |
3015372d FZ |
2562 | int64_t cur_size = MIN(size - created_size, extent_size); |
2563 | extent_blk = extent_fn(cur_size, extent_idx, flat, split, compress, | |
2564 | zeroed_grain, opaque, errp); | |
2565 | if (!extent_blk) { | |
af057fe7 FZ |
2566 | ret = -EINVAL; |
2567 | goto exit; | |
f66fd6c3 | 2568 | } |
3015372d FZ |
2569 | vmdk_desc_add_extent(ext_desc_lines, extent_line_fmt, cur_size, |
2570 | blk_bs(extent_blk)->filename); | |
2571 | created_size += cur_size; | |
2572 | extent_idx++; | |
b2ab5f54 | 2573 | blk_co_unref(extent_blk); |
f66fd6c3 | 2574 | } |
4a960ece KW |
2575 | |
2576 | /* Check whether we got excess extents */ | |
2577 | extent_blk = extent_fn(-1, extent_idx, flat, split, compress, zeroed_grain, | |
2578 | opaque, NULL); | |
2579 | if (extent_blk) { | |
b2ab5f54 | 2580 | blk_co_unref(extent_blk); |
4a960ece KW |
2581 | error_setg(errp, "List of extents contains unused extents"); |
2582 | ret = -EINVAL; | |
2583 | goto exit; | |
2584 | } | |
2585 | ||
f66fd6c3 | 2586 | /* generate descriptor file */ |
af057fe7 | 2587 | desc = g_strdup_printf(desc_template, |
e5dc64b8 | 2588 | g_random_int(), |
af057fe7 | 2589 | parent_cid, |
3015372d | 2590 | BlockdevVmdkSubformat_str(subformat), |
af057fe7 FZ |
2591 | parent_desc_line, |
2592 | ext_desc_lines->str, | |
f249924e | 2593 | hw_version, |
3015372d | 2594 | size / |
917703c1 | 2595 | (int64_t)(63 * number_heads * BDRV_SECTOR_SIZE), |
af057fe7 | 2596 | number_heads, |
f3d43dfd TW |
2597 | BlockdevVmdkAdapterType_str(adapter_type), |
2598 | toolsversion); | |
917703c1 FZ |
2599 | desc_len = strlen(desc); |
2600 | /* the descriptor offset = 0x200 */ | |
2601 | if (!split && !flat) { | |
2602 | desc_offset = 0x200; | |
3015372d FZ |
2603 | } |
2604 | ||
a5c4e5be | 2605 | ret = blk_co_pwrite(blk, desc_offset, desc_len, desc, 0); |
3015372d FZ |
2606 | if (ret < 0) { |
2607 | error_setg_errno(errp, -ret, "Could not write description"); | |
2608 | goto exit; | |
2609 | } | |
2610 | /* bdrv_pwrite write padding zeros to align to sector, we don't need that | |
2611 | * for description file */ | |
2612 | if (desc_offset == 0) { | |
a5c4e5be | 2613 | ret = blk_co_truncate(blk, desc_len, false, PREALLOC_MODE_OFF, 0, errp); |
917703c1 | 2614 | if (ret < 0) { |
917703c1 FZ |
2615 | goto exit; |
2616 | } | |
f66fd6c3 | 2617 | } |
3015372d FZ |
2618 | ret = 0; |
2619 | exit: | |
2620 | if (blk) { | |
b2ab5f54 | 2621 | blk_co_unref(blk); |
3015372d FZ |
2622 | } |
2623 | g_free(desc); | |
2624 | g_free(parent_desc_line); | |
2625 | g_string_free(ext_desc_lines, true); | |
2626 | return ret; | |
2627 | } | |
c4bea169 | 2628 | |
3015372d FZ |
2629 | typedef struct { |
2630 | char *path; | |
2631 | char *prefix; | |
2632 | char *postfix; | |
2633 | QemuOpts *opts; | |
2634 | } VMDKCreateOptsData; | |
2635 | ||
4db7ba3b | 2636 | static BlockBackend * coroutine_fn GRAPH_UNLOCKED |
4ec8df01 KW |
2637 | vmdk_co_create_opts_cb(int64_t size, int idx, bool flat, bool split, |
2638 | bool compress, bool zeroed_grain, void *opaque, | |
2639 | Error **errp) | |
3015372d FZ |
2640 | { |
2641 | BlockBackend *blk = NULL; | |
2642 | BlockDriverState *bs = NULL; | |
2643 | VMDKCreateOptsData *data = opaque; | |
2644 | char *ext_filename = NULL; | |
2645 | char *rel_filename = NULL; | |
2646 | ||
4a960ece KW |
2647 | /* We're done, don't create excess extents. */ |
2648 | if (size == -1) { | |
2649 | assert(errp == NULL); | |
2650 | return NULL; | |
2651 | } | |
2652 | ||
3015372d FZ |
2653 | if (idx == 0) { |
2654 | rel_filename = g_strdup_printf("%s%s", data->prefix, data->postfix); | |
2655 | } else if (split) { | |
2656 | rel_filename = g_strdup_printf("%s-%c%03d%s", | |
2657 | data->prefix, | |
2658 | flat ? 'f' : 's', idx, data->postfix); | |
2659 | } else { | |
2660 | assert(idx == 1); | |
2661 | rel_filename = g_strdup_printf("%s-flat%s", data->prefix, data->postfix); | |
2662 | } | |
2663 | ||
2664 | ext_filename = g_strdup_printf("%s%s", data->path, rel_filename); | |
2665 | g_free(rel_filename); | |
2666 | ||
2667 | if (vmdk_create_extent(ext_filename, size, | |
2668 | flat, compress, zeroed_grain, &blk, data->opts, | |
2669 | errp)) { | |
af057fe7 | 2670 | goto exit; |
f66fd6c3 | 2671 | } |
b2ab5f54 | 2672 | bdrv_co_unref(bs); |
3015372d FZ |
2673 | exit: |
2674 | g_free(ext_filename); | |
2675 | return blk; | |
2676 | } | |
c4bea169 | 2677 | |
4db7ba3b | 2678 | static int coroutine_fn GRAPH_UNLOCKED |
4ec8df01 KW |
2679 | vmdk_co_create_opts(BlockDriver *drv, const char *filename, |
2680 | QemuOpts *opts, Error **errp) | |
3015372d FZ |
2681 | { |
2682 | Error *local_err = NULL; | |
2683 | char *desc = NULL; | |
2684 | int64_t total_size = 0; | |
2685 | char *adapter_type = NULL; | |
2686 | BlockdevVmdkAdapterType adapter_type_enum; | |
2687 | char *backing_file = NULL; | |
2688 | char *hw_version = NULL; | |
f3d43dfd | 2689 | char *toolsversion = NULL; |
3015372d FZ |
2690 | char *fmt = NULL; |
2691 | BlockdevVmdkSubformat subformat; | |
2692 | int ret = 0; | |
2693 | char *path = g_malloc0(PATH_MAX); | |
2694 | char *prefix = g_malloc0(PATH_MAX); | |
2695 | char *postfix = g_malloc0(PATH_MAX); | |
2696 | char *desc_line = g_malloc0(BUF_SIZE); | |
2697 | char *ext_filename = g_malloc0(PATH_MAX); | |
2698 | char *desc_filename = g_malloc0(PATH_MAX); | |
2699 | char *parent_desc_line = g_malloc0(BUF_SIZE); | |
2700 | bool zeroed_grain; | |
2701 | bool compat6; | |
2702 | VMDKCreateOptsData data; | |
d51a814c EB |
2703 | char *backing_fmt = NULL; |
2704 | ||
2705 | backing_fmt = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FMT); | |
2706 | if (backing_fmt && strcmp(backing_fmt, "vmdk") != 0) { | |
2707 | error_setg(errp, "backing_file must be a vmdk image"); | |
2708 | ret = -EINVAL; | |
2709 | goto exit; | |
2710 | } | |
c4bea169 | 2711 | |
3015372d FZ |
2712 | if (filename_decompose(filename, path, prefix, postfix, PATH_MAX, errp)) { |
2713 | ret = -EINVAL; | |
917703c1 | 2714 | goto exit; |
f66fd6c3 | 2715 | } |
3015372d FZ |
2716 | /* Read out options */ |
2717 | total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), | |
2718 | BDRV_SECTOR_SIZE); | |
2719 | adapter_type = qemu_opt_get_del(opts, BLOCK_OPT_ADAPTER_TYPE); | |
2720 | backing_file = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FILE); | |
2721 | hw_version = qemu_opt_get_del(opts, BLOCK_OPT_HWVERSION); | |
f3d43dfd | 2722 | toolsversion = qemu_opt_get_del(opts, BLOCK_OPT_TOOLSVERSION); |
3015372d FZ |
2723 | compat6 = qemu_opt_get_bool_del(opts, BLOCK_OPT_COMPAT6, false); |
2724 | if (strcmp(hw_version, "undefined") == 0) { | |
2725 | g_free(hw_version); | |
26c9296c | 2726 | hw_version = NULL; |
1640366c | 2727 | } |
3015372d FZ |
2728 | fmt = qemu_opt_get_del(opts, BLOCK_OPT_SUBFMT); |
2729 | zeroed_grain = qemu_opt_get_bool_del(opts, BLOCK_OPT_ZEROED_GRAIN, false); | |
2730 | ||
2731 | if (adapter_type) { | |
2732 | adapter_type_enum = qapi_enum_parse(&BlockdevVmdkAdapterType_lookup, | |
2733 | adapter_type, | |
2734 | BLOCKDEV_VMDK_ADAPTER_TYPE_IDE, | |
2735 | &local_err); | |
2736 | if (local_err) { | |
2737 | error_propagate(errp, local_err); | |
2738 | ret = -EINVAL; | |
2739 | goto exit; | |
2740 | } | |
2741 | } else { | |
2742 | adapter_type_enum = BLOCKDEV_VMDK_ADAPTER_TYPE_IDE; | |
917703c1 | 2743 | } |
3015372d FZ |
2744 | |
2745 | if (!fmt) { | |
2746 | /* Default format to monolithicSparse */ | |
2747 | subformat = BLOCKDEV_VMDK_SUBFORMAT_MONOLITHICSPARSE; | |
2748 | } else { | |
2749 | subformat = qapi_enum_parse(&BlockdevVmdkSubformat_lookup, | |
2750 | fmt, | |
2751 | BLOCKDEV_VMDK_SUBFORMAT_MONOLITHICSPARSE, | |
2752 | &local_err); | |
2753 | if (local_err) { | |
2754 | error_propagate(errp, local_err); | |
2755 | ret = -EINVAL; | |
2756 | goto exit; | |
2757 | } | |
2758 | } | |
2759 | data = (VMDKCreateOptsData){ | |
2760 | .prefix = prefix, | |
2761 | .postfix = postfix, | |
2762 | .path = path, | |
2763 | .opts = opts, | |
2764 | }; | |
2765 | ret = vmdk_co_do_create(total_size, subformat, adapter_type_enum, | |
f3d43dfd TW |
2766 | backing_file, hw_version, toolsversion, compat6, |
2767 | zeroed_grain, vmdk_co_create_opts_cb, &data, errp); | |
3015372d FZ |
2768 | |
2769 | exit: | |
d51a814c | 2770 | g_free(backing_fmt); |
5820f1da CL |
2771 | g_free(adapter_type); |
2772 | g_free(backing_file); | |
f249924e | 2773 | g_free(hw_version); |
f3d43dfd | 2774 | g_free(toolsversion); |
5820f1da | 2775 | g_free(fmt); |
af057fe7 | 2776 | g_free(desc); |
fe206562 JC |
2777 | g_free(path); |
2778 | g_free(prefix); | |
2779 | g_free(postfix); | |
2780 | g_free(desc_line); | |
2781 | g_free(ext_filename); | |
2782 | g_free(desc_filename); | |
2783 | g_free(parent_desc_line); | |
3015372d FZ |
2784 | return ret; |
2785 | } | |
2786 | ||
4db7ba3b KW |
2787 | static BlockBackend * coroutine_fn GRAPH_UNLOCKED |
2788 | vmdk_co_create_cb(int64_t size, int idx, bool flat, bool split, bool compress, | |
2789 | bool zeroed_grain, void *opaque, Error **errp) | |
3015372d FZ |
2790 | { |
2791 | int ret; | |
2792 | BlockDriverState *bs; | |
2793 | BlockBackend *blk; | |
2794 | BlockdevCreateOptionsVmdk *opts = opaque; | |
2795 | ||
2796 | if (idx == 0) { | |
882f202e | 2797 | bs = bdrv_co_open_blockdev_ref(opts->file, errp); |
3015372d FZ |
2798 | } else { |
2799 | int i; | |
2800 | BlockdevRefList *list = opts->extents; | |
2801 | for (i = 1; i < idx; i++) { | |
2802 | if (!list || !list->next) { | |
2803 | error_setg(errp, "Extent [%d] not specified", i); | |
2804 | return NULL; | |
2805 | } | |
2806 | list = list->next; | |
2807 | } | |
2808 | if (!list) { | |
2809 | error_setg(errp, "Extent [%d] not specified", idx - 1); | |
2810 | return NULL; | |
2811 | } | |
882f202e | 2812 | bs = bdrv_co_open_blockdev_ref(list->value, errp); |
3015372d FZ |
2813 | } |
2814 | if (!bs) { | |
2815 | return NULL; | |
2816 | } | |
882f202e KW |
2817 | blk = blk_co_new_with_bs(bs, |
2818 | BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE | | |
2819 | BLK_PERM_RESIZE, | |
2820 | BLK_PERM_ALL, | |
2821 | errp); | |
a3aeeab5 | 2822 | if (!blk) { |
3015372d FZ |
2823 | return NULL; |
2824 | } | |
2825 | blk_set_allow_write_beyond_eof(blk, true); | |
b2ab5f54 | 2826 | bdrv_co_unref(bs); |
3015372d | 2827 | |
4a960ece KW |
2828 | if (size != -1) { |
2829 | ret = vmdk_init_extent(blk, size, flat, compress, zeroed_grain, errp); | |
2830 | if (ret) { | |
b2ab5f54 | 2831 | blk_co_unref(blk); |
4a960ece KW |
2832 | blk = NULL; |
2833 | } | |
3015372d FZ |
2834 | } |
2835 | return blk; | |
2836 | } | |
2837 | ||
4db7ba3b | 2838 | static int coroutine_fn GRAPH_UNLOCKED |
4ec8df01 | 2839 | vmdk_co_create(BlockdevCreateOptions *create_options, Error **errp) |
3015372d | 2840 | { |
3015372d FZ |
2841 | BlockdevCreateOptionsVmdk *opts; |
2842 | ||
2843 | opts = &create_options->u.vmdk; | |
2844 | ||
2845 | /* Validate options */ | |
2846 | if (!QEMU_IS_ALIGNED(opts->size, BDRV_SECTOR_SIZE)) { | |
2847 | error_setg(errp, "Image size must be a multiple of 512 bytes"); | |
851fd4a0 | 2848 | return -EINVAL; |
3015372d FZ |
2849 | } |
2850 | ||
851fd4a0 MA |
2851 | return vmdk_co_do_create(opts->size, |
2852 | opts->subformat, | |
2853 | opts->adapter_type, | |
2854 | opts->backing_file, | |
2855 | opts->hwversion, | |
2856 | opts->toolsversion, | |
2857 | false, | |
2858 | opts->zeroed_grain, | |
2859 | vmdk_co_create_cb, | |
2860 | opts, errp); | |
8979b227 FB |
2861 | } |
2862 | ||
e2731add | 2863 | static void vmdk_close(BlockDriverState *bs) |
ea2384d3 | 2864 | { |
2bc3166c KW |
2865 | BDRVVmdkState *s = bs->opaque; |
2866 | ||
b3976d3c | 2867 | vmdk_free_extents(bs); |
f4c129a3 | 2868 | g_free(s->create_type); |
2bc3166c KW |
2869 | |
2870 | migrate_del_blocker(s->migration_blocker); | |
2871 | error_free(s->migration_blocker); | |
ea2384d3 FB |
2872 | } |
2873 | ||
de335638 | 2874 | static int64_t coroutine_fn GRAPH_RDLOCK |
82618d7b | 2875 | vmdk_co_get_allocated_file_size(BlockDriverState *bs) |
4a1d5e1f FZ |
2876 | { |
2877 | int i; | |
2878 | int64_t ret = 0; | |
2879 | int64_t r; | |
2880 | BDRVVmdkState *s = bs->opaque; | |
2881 | ||
82618d7b | 2882 | ret = bdrv_co_get_allocated_file_size(bs->file->bs); |
4a1d5e1f FZ |
2883 | if (ret < 0) { |
2884 | return ret; | |
2885 | } | |
2886 | for (i = 0; i < s->num_extents; i++) { | |
9a4f4c31 | 2887 | if (s->extents[i].file == bs->file) { |
4a1d5e1f FZ |
2888 | continue; |
2889 | } | |
82618d7b | 2890 | r = bdrv_co_get_allocated_file_size(s->extents[i].file->bs); |
4a1d5e1f FZ |
2891 | if (r < 0) { |
2892 | return r; | |
2893 | } | |
2894 | ret += r; | |
2895 | } | |
2896 | return ret; | |
2897 | } | |
0e7e1989 | 2898 | |
da7a50f9 FZ |
2899 | static int vmdk_has_zero_init(BlockDriverState *bs) |
2900 | { | |
2901 | int i; | |
2902 | BDRVVmdkState *s = bs->opaque; | |
2903 | ||
2904 | /* If has a flat extent and its underlying storage doesn't have zero init, | |
2905 | * return 0. */ | |
2906 | for (i = 0; i < s->num_extents; i++) { | |
2907 | if (s->extents[i].flat) { | |
24bc15d1 | 2908 | if (!bdrv_has_zero_init(s->extents[i].file->bs)) { |
da7a50f9 FZ |
2909 | return 0; |
2910 | } | |
2911 | } | |
2912 | } | |
2913 | return 1; | |
2914 | } | |
2915 | ||
b7cfc7d5 | 2916 | static VmdkExtentInfo * GRAPH_RDLOCK vmdk_get_extent_info(VmdkExtent *extent) |
f4c129a3 | 2917 | { |
456e7517 | 2918 | VmdkExtentInfo *info = g_new0(VmdkExtentInfo, 1); |
f4c129a3 | 2919 | |
f30c66ba | 2920 | bdrv_refresh_filename(extent->file->bs); |
456e7517 | 2921 | *info = (VmdkExtentInfo){ |
24bc15d1 | 2922 | .filename = g_strdup(extent->file->bs->filename), |
f4c129a3 FZ |
2923 | .format = g_strdup(extent->type), |
2924 | .virtual_size = extent->sectors * BDRV_SECTOR_SIZE, | |
2925 | .compressed = extent->compressed, | |
2926 | .has_compressed = extent->compressed, | |
2927 | .cluster_size = extent->cluster_sectors * BDRV_SECTOR_SIZE, | |
2928 | .has_cluster_size = !extent->flat, | |
2929 | }; | |
2930 | ||
2931 | return info; | |
2932 | } | |
2933 | ||
b9b10c35 KW |
2934 | static int coroutine_fn GRAPH_RDLOCK |
2935 | vmdk_co_check(BlockDriverState *bs, BdrvCheckResult *result, BdrvCheckMode fix) | |
f43aa8e1 PL |
2936 | { |
2937 | BDRVVmdkState *s = bs->opaque; | |
2938 | VmdkExtent *extent = NULL; | |
2939 | int64_t sector_num = 0; | |
17362398 | 2940 | int64_t total_sectors = bdrv_co_nb_sectors(bs); |
f43aa8e1 PL |
2941 | int ret; |
2942 | uint64_t cluster_offset; | |
2943 | ||
2944 | if (fix) { | |
2945 | return -ENOTSUP; | |
2946 | } | |
2947 | ||
2948 | for (;;) { | |
2949 | if (sector_num >= total_sectors) { | |
2950 | return 0; | |
2951 | } | |
2952 | extent = find_extent(s, sector_num, extent); | |
2953 | if (!extent) { | |
2954 | fprintf(stderr, | |
2955 | "ERROR: could not find extent for sector %" PRId64 "\n", | |
2956 | sector_num); | |
0e51b9b7 | 2957 | ret = -EINVAL; |
f43aa8e1 PL |
2958 | break; |
2959 | } | |
2960 | ret = get_cluster_offset(bs, extent, NULL, | |
2961 | sector_num << BDRV_SECTOR_BITS, | |
c6ac36e1 | 2962 | false, &cluster_offset, 0, 0); |
f43aa8e1 PL |
2963 | if (ret == VMDK_ERROR) { |
2964 | fprintf(stderr, | |
2965 | "ERROR: could not get cluster_offset for sector %" | |
2966 | PRId64 "\n", sector_num); | |
2967 | break; | |
2968 | } | |
0e51b9b7 | 2969 | if (ret == VMDK_OK) { |
0af02bd1 | 2970 | int64_t extent_len = bdrv_co_getlength(extent->file->bs); |
0e51b9b7 FZ |
2971 | if (extent_len < 0) { |
2972 | fprintf(stderr, | |
2973 | "ERROR: could not get extent file length for sector %" | |
2974 | PRId64 "\n", sector_num); | |
2975 | ret = extent_len; | |
2976 | break; | |
2977 | } | |
2978 | if (cluster_offset >= extent_len) { | |
2979 | fprintf(stderr, | |
2980 | "ERROR: cluster offset for sector %" | |
2981 | PRId64 " points after EOF\n", sector_num); | |
2982 | ret = -EINVAL; | |
2983 | break; | |
2984 | } | |
f43aa8e1 PL |
2985 | } |
2986 | sector_num += extent->cluster_sectors; | |
2987 | } | |
2988 | ||
2989 | result->corruptions++; | |
0e51b9b7 | 2990 | return ret; |
f43aa8e1 PL |
2991 | } |
2992 | ||
1bf6e9ca AS |
2993 | static ImageInfoSpecific *vmdk_get_specific_info(BlockDriverState *bs, |
2994 | Error **errp) | |
f4c129a3 FZ |
2995 | { |
2996 | int i; | |
2997 | BDRVVmdkState *s = bs->opaque; | |
2998 | ImageInfoSpecific *spec_info = g_new0(ImageInfoSpecific, 1); | |
456e7517 | 2999 | VmdkExtentInfoList **tail; |
f4c129a3 | 3000 | |
b7cfc7d5 KW |
3001 | assume_graph_lock(); /* FIXME */ |
3002 | ||
f4c129a3 | 3003 | *spec_info = (ImageInfoSpecific){ |
6a8f9661 | 3004 | .type = IMAGE_INFO_SPECIFIC_KIND_VMDK, |
32bafa8f EB |
3005 | .u = { |
3006 | .vmdk.data = g_new0(ImageInfoSpecificVmdk, 1), | |
f4c129a3 FZ |
3007 | }, |
3008 | }; | |
3009 | ||
32bafa8f | 3010 | *spec_info->u.vmdk.data = (ImageInfoSpecificVmdk) { |
f4c129a3 FZ |
3011 | .create_type = g_strdup(s->create_type), |
3012 | .cid = s->cid, | |
3013 | .parent_cid = s->parent_cid, | |
3014 | }; | |
3015 | ||
c3033fd3 | 3016 | tail = &spec_info->u.vmdk.data->extents; |
f4c129a3 | 3017 | for (i = 0; i < s->num_extents; i++) { |
c3033fd3 | 3018 | QAPI_LIST_APPEND(tail, vmdk_get_extent_info(&s->extents[i])); |
f4c129a3 FZ |
3019 | } |
3020 | ||
3021 | return spec_info; | |
3022 | } | |
3023 | ||
5f583307 FZ |
3024 | static bool vmdk_extents_type_eq(const VmdkExtent *a, const VmdkExtent *b) |
3025 | { | |
3026 | return a->flat == b->flat && | |
3027 | a->compressed == b->compressed && | |
3028 | (a->flat || a->cluster_sectors == b->cluster_sectors); | |
3029 | } | |
3030 | ||
3d47eb0a EGE |
3031 | static int coroutine_fn |
3032 | vmdk_co_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) | |
74fe188c FZ |
3033 | { |
3034 | int i; | |
3035 | BDRVVmdkState *s = bs->opaque; | |
3036 | assert(s->num_extents); | |
5f583307 | 3037 | |
74fe188c FZ |
3038 | /* See if we have multiple extents but they have different cases */ |
3039 | for (i = 1; i < s->num_extents; i++) { | |
5f583307 | 3040 | if (!vmdk_extents_type_eq(&s->extents[0], &s->extents[i])) { |
74fe188c FZ |
3041 | return -ENOTSUP; |
3042 | } | |
3043 | } | |
5f583307 FZ |
3044 | bdi->needs_compressed_writes = s->extents[0].compressed; |
3045 | if (!s->extents[0].flat) { | |
3046 | bdi->cluster_size = s->extents[0].cluster_sectors << BDRV_SECTOR_BITS; | |
3047 | } | |
74fe188c FZ |
3048 | return 0; |
3049 | } | |
3050 | ||
abc521a9 HR |
3051 | static void vmdk_gather_child_options(BlockDriverState *bs, QDict *target, |
3052 | bool backing_overridden) | |
3053 | { | |
3054 | /* No children but file and backing can be explicitly specified (TODO) */ | |
3055 | qdict_put(target, "file", | |
3056 | qobject_ref(bs->file->bs->full_open_options)); | |
3057 | ||
3058 | if (backing_overridden) { | |
3059 | if (bs->backing) { | |
3060 | qdict_put(target, "backing", | |
3061 | qobject_ref(bs->backing->bs->full_open_options)); | |
3062 | } else { | |
3063 | qdict_put_null(target, "backing"); | |
3064 | } | |
3065 | } | |
3066 | } | |
3067 | ||
5820f1da CL |
3068 | static QemuOptsList vmdk_create_opts = { |
3069 | .name = "vmdk-create-opts", | |
3070 | .head = QTAILQ_HEAD_INITIALIZER(vmdk_create_opts.head), | |
3071 | .desc = { | |
3072 | { | |
3073 | .name = BLOCK_OPT_SIZE, | |
3074 | .type = QEMU_OPT_SIZE, | |
3075 | .help = "Virtual disk size" | |
3076 | }, | |
3077 | { | |
3078 | .name = BLOCK_OPT_ADAPTER_TYPE, | |
3079 | .type = QEMU_OPT_STRING, | |
3080 | .help = "Virtual adapter type, can be one of " | |
3081 | "ide (default), lsilogic, buslogic or legacyESX" | |
3082 | }, | |
3083 | { | |
3084 | .name = BLOCK_OPT_BACKING_FILE, | |
3085 | .type = QEMU_OPT_STRING, | |
3086 | .help = "File name of a base image" | |
3087 | }, | |
d51a814c EB |
3088 | { |
3089 | .name = BLOCK_OPT_BACKING_FMT, | |
3090 | .type = QEMU_OPT_STRING, | |
3091 | .help = "Must be 'vmdk' if present", | |
3092 | }, | |
5820f1da CL |
3093 | { |
3094 | .name = BLOCK_OPT_COMPAT6, | |
3095 | .type = QEMU_OPT_BOOL, | |
3096 | .help = "VMDK version 6 image", | |
3097 | .def_value_str = "off" | |
3098 | }, | |
f249924e JK |
3099 | { |
3100 | .name = BLOCK_OPT_HWVERSION, | |
3101 | .type = QEMU_OPT_STRING, | |
3102 | .help = "VMDK hardware version", | |
3103 | .def_value_str = "undefined" | |
3104 | }, | |
f3d43dfd TW |
3105 | { |
3106 | .name = BLOCK_OPT_TOOLSVERSION, | |
3107 | .type = QEMU_OPT_STRING, | |
3108 | .help = "VMware guest tools version", | |
3109 | }, | |
5820f1da CL |
3110 | { |
3111 | .name = BLOCK_OPT_SUBFMT, | |
3112 | .type = QEMU_OPT_STRING, | |
3113 | .help = | |
3114 | "VMDK flat extent format, can be one of " | |
3115 | "{monolithicSparse (default) | monolithicFlat | twoGbMaxExtentSparse | twoGbMaxExtentFlat | streamOptimized} " | |
3116 | }, | |
3117 | { | |
3118 | .name = BLOCK_OPT_ZEROED_GRAIN, | |
3119 | .type = QEMU_OPT_BOOL, | |
3120 | .help = "Enable efficient zero writes " | |
3121 | "using the zeroed-grain GTE feature" | |
3122 | }, | |
3123 | { /* end of list */ } | |
3124 | } | |
0e7e1989 KW |
3125 | }; |
3126 | ||
5efa9d5a | 3127 | static BlockDriver bdrv_vmdk = { |
da7a50f9 FZ |
3128 | .format_name = "vmdk", |
3129 | .instance_size = sizeof(BDRVVmdkState), | |
3130 | .bdrv_probe = vmdk_probe, | |
3131 | .bdrv_open = vmdk_open, | |
2fd61638 | 3132 | .bdrv_co_check = vmdk_co_check, |
da7a50f9 | 3133 | .bdrv_reopen_prepare = vmdk_reopen_prepare, |
6d17e287 HR |
3134 | .bdrv_reopen_commit = vmdk_reopen_commit, |
3135 | .bdrv_reopen_abort = vmdk_reopen_abort, | |
69dca43d | 3136 | .bdrv_child_perm = bdrv_default_perms, |
f10cc243 | 3137 | .bdrv_co_preadv = vmdk_co_preadv, |
37b1d7d8 | 3138 | .bdrv_co_pwritev = vmdk_co_pwritev, |
b2c622d3 | 3139 | .bdrv_co_pwritev_compressed = vmdk_co_pwritev_compressed, |
a620f2ae | 3140 | .bdrv_co_pwrite_zeroes = vmdk_co_pwrite_zeroes, |
da7a50f9 | 3141 | .bdrv_close = vmdk_close, |
efc75e2a | 3142 | .bdrv_co_create_opts = vmdk_co_create_opts, |
3015372d | 3143 | .bdrv_co_create = vmdk_co_create, |
c72080b9 | 3144 | .bdrv_co_block_status = vmdk_co_block_status, |
82618d7b | 3145 | .bdrv_co_get_allocated_file_size = vmdk_co_get_allocated_file_size, |
da7a50f9 | 3146 | .bdrv_has_zero_init = vmdk_has_zero_init, |
f4c129a3 | 3147 | .bdrv_get_specific_info = vmdk_get_specific_info, |
d34682cd | 3148 | .bdrv_refresh_limits = vmdk_refresh_limits, |
3d47eb0a | 3149 | .bdrv_co_get_info = vmdk_co_get_info, |
abc521a9 | 3150 | .bdrv_gather_child_options = vmdk_gather_child_options, |
da7a50f9 | 3151 | |
d67066d8 | 3152 | .is_format = true, |
8ee79e70 | 3153 | .supports_backing = true, |
5820f1da | 3154 | .create_opts = &vmdk_create_opts, |
ea2384d3 | 3155 | }; |
5efa9d5a AL |
3156 | |
3157 | static void bdrv_vmdk_init(void) | |
3158 | { | |
3159 | bdrv_register(&bdrv_vmdk); | |
3160 | } | |
3161 | ||
3162 | block_init(bdrv_vmdk_init); |