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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 | |
6bc30f19 | 275 | bdrv_graph_wrlock(); |
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 | } |
6bc30f19 | 286 | bdrv_graph_wrunlock(); |
32a8aba3 | 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 | 302 | /* Return -ve errno, or 0 on success and write CID into *pcid. */ |
1f051dcb KW |
303 | static int GRAPH_RDLOCK |
304 | vmdk_read_cid(BlockDriverState *bs, int parent, uint32_t *pcid) | |
ea2384d3 | 305 | { |
5997c210 | 306 | char *desc; |
9877860e | 307 | uint32_t cid; |
7ccfb2eb | 308 | const char *p_name, *cid_str; |
5f4da8c0 | 309 | size_t cid_str_size; |
e1da9b24 | 310 | BDRVVmdkState *s = bs->opaque; |
99f1835d | 311 | int ret; |
5f4da8c0 | 312 | |
5997c210 | 313 | desc = g_malloc0(DESC_SIZE); |
32cc71de | 314 | ret = bdrv_pread(bs->file, s->desc_offset, DESC_SIZE, desc, 0); |
99f1835d | 315 | if (ret < 0) { |
9877860e | 316 | goto out; |
e1da9b24 | 317 | } |
5f4da8c0 TS |
318 | |
319 | if (parent) { | |
320 | cid_str = "parentCID"; | |
321 | cid_str_size = sizeof("parentCID"); | |
322 | } else { | |
323 | cid_str = "CID"; | |
324 | cid_str_size = sizeof("CID"); | |
325 | } | |
326 | ||
93897b9f | 327 | desc[DESC_SIZE - 1] = '\0'; |
ae261c86 | 328 | p_name = strstr(desc, cid_str); |
9877860e PM |
329 | if (p_name == NULL) { |
330 | ret = -EINVAL; | |
331 | goto out; | |
5f4da8c0 | 332 | } |
9877860e PM |
333 | p_name += cid_str_size; |
334 | if (sscanf(p_name, "%" SCNx32, &cid) != 1) { | |
335 | ret = -EINVAL; | |
336 | goto out; | |
337 | } | |
338 | *pcid = cid; | |
339 | ret = 0; | |
5f4da8c0 | 340 | |
9877860e | 341 | out: |
5997c210 | 342 | g_free(desc); |
9877860e | 343 | return ret; |
5f4da8c0 TS |
344 | } |
345 | ||
28944f99 PB |
346 | static int coroutine_fn GRAPH_RDLOCK |
347 | vmdk_write_cid(BlockDriverState *bs, uint32_t cid) | |
5f4da8c0 | 348 | { |
965415eb | 349 | char *desc, *tmp_desc; |
5f4da8c0 | 350 | char *p_name, *tmp_str; |
e1da9b24 | 351 | BDRVVmdkState *s = bs->opaque; |
965415eb | 352 | int ret = 0; |
5f4da8c0 | 353 | |
9fb7b350 FZ |
354 | size_t desc_buf_size; |
355 | ||
356 | if (s->desc_offset == 0) { | |
357 | desc_buf_size = bdrv_getlength(bs->file->bs); | |
358 | if (desc_buf_size > 16ULL << 20) { | |
359 | error_report("VMDK description file too big"); | |
360 | return -EFBIG; | |
361 | } | |
362 | } else { | |
363 | desc_buf_size = DESC_SIZE; | |
364 | } | |
365 | ||
366 | desc = g_malloc0(desc_buf_size); | |
367 | tmp_desc = g_malloc0(desc_buf_size); | |
368 | ret = bdrv_co_pread(bs->file, s->desc_offset, desc_buf_size, desc, 0); | |
99f1835d | 369 | if (ret < 0) { |
965415eb | 370 | goto out; |
e1da9b24 | 371 | } |
5f4da8c0 | 372 | |
9fb7b350 | 373 | desc[desc_buf_size - 1] = '\0'; |
ae261c86 | 374 | tmp_str = strstr(desc, "parentCID"); |
93897b9f | 375 | if (tmp_str == NULL) { |
965415eb FZ |
376 | ret = -EINVAL; |
377 | goto out; | |
93897b9f KW |
378 | } |
379 | ||
9fb7b350 | 380 | pstrcpy(tmp_desc, desc_buf_size, tmp_str); |
ae261c86 FZ |
381 | p_name = strstr(desc, "CID"); |
382 | if (p_name != NULL) { | |
5f4da8c0 | 383 | p_name += sizeof("CID"); |
9fb7b350 FZ |
384 | snprintf(p_name, desc_buf_size - (p_name - desc), "%" PRIx32 "\n", cid); |
385 | pstrcat(desc, desc_buf_size, tmp_desc); | |
5f4da8c0 TS |
386 | } |
387 | ||
9fb7b350 | 388 | ret = bdrv_co_pwrite_sync(bs->file, s->desc_offset, desc_buf_size, desc, 0); |
99f1835d | 389 | |
965415eb FZ |
390 | out: |
391 | g_free(desc); | |
392 | g_free(tmp_desc); | |
393 | return ret; | |
5f4da8c0 TS |
394 | } |
395 | ||
004915a9 | 396 | static int coroutine_fn GRAPH_RDLOCK vmdk_is_cid_valid(BlockDriverState *bs) |
5f4da8c0 | 397 | { |
5f4da8c0 | 398 | BDRVVmdkState *s = bs->opaque; |
5f4da8c0 TS |
399 | uint32_t cur_pcid; |
400 | ||
760e0063 KW |
401 | if (!s->cid_checked && bs->backing) { |
402 | BlockDriverState *p_bs = bs->backing->bs; | |
403 | ||
439e89fc HR |
404 | if (strcmp(p_bs->drv->format_name, "vmdk")) { |
405 | /* Backing file is not in vmdk format, so it does not have | |
406 | * a CID, which makes the overlay's parent CID invalid */ | |
407 | return 0; | |
408 | } | |
409 | ||
9877860e PM |
410 | if (vmdk_read_cid(p_bs, 0, &cur_pcid) != 0) { |
411 | /* read failure: report as not valid */ | |
412 | return 0; | |
413 | } | |
ae261c86 FZ |
414 | if (s->parent_cid != cur_pcid) { |
415 | /* CID not valid */ | |
5f4da8c0 | 416 | return 0; |
ae261c86 | 417 | } |
5f4da8c0 | 418 | } |
c338b6ad | 419 | s->cid_checked = true; |
ae261c86 | 420 | /* CID valid */ |
5f4da8c0 TS |
421 | return 1; |
422 | } | |
423 | ||
3897575f JC |
424 | static int vmdk_reopen_prepare(BDRVReopenState *state, |
425 | BlockReopenQueue *queue, Error **errp) | |
426 | { | |
6d17e287 HR |
427 | BDRVVmdkState *s; |
428 | BDRVVmdkReopenState *rs; | |
429 | int i; | |
430 | ||
1f051dcb KW |
431 | GLOBAL_STATE_CODE(); |
432 | GRAPH_RDLOCK_GUARD_MAINLOOP(); | |
433 | ||
3897575f JC |
434 | assert(state != NULL); |
435 | assert(state->bs != NULL); | |
6d17e287 HR |
436 | assert(state->opaque == NULL); |
437 | ||
438 | s = state->bs->opaque; | |
439 | ||
440 | rs = g_new0(BDRVVmdkReopenState, 1); | |
441 | state->opaque = rs; | |
442 | ||
443 | /* | |
444 | * Check whether there are any extents stored in bs->file; if bs->file | |
445 | * changes, we will need to update their .file pointers to follow suit | |
446 | */ | |
447 | rs->extents_using_bs_file = g_new(bool, s->num_extents); | |
448 | for (i = 0; i < s->num_extents; i++) { | |
449 | rs->extents_using_bs_file[i] = s->extents[i].file == state->bs->file; | |
450 | } | |
451 | ||
67251a31 | 452 | return 0; |
3897575f JC |
453 | } |
454 | ||
6d17e287 HR |
455 | static void vmdk_reopen_clean(BDRVReopenState *state) |
456 | { | |
457 | BDRVVmdkReopenState *rs = state->opaque; | |
458 | ||
459 | g_free(rs->extents_using_bs_file); | |
460 | g_free(rs); | |
461 | state->opaque = NULL; | |
462 | } | |
463 | ||
464 | static void vmdk_reopen_commit(BDRVReopenState *state) | |
465 | { | |
466 | BDRVVmdkState *s = state->bs->opaque; | |
467 | BDRVVmdkReopenState *rs = state->opaque; | |
468 | int i; | |
469 | ||
1f051dcb KW |
470 | GLOBAL_STATE_CODE(); |
471 | GRAPH_RDLOCK_GUARD_MAINLOOP(); | |
472 | ||
6d17e287 HR |
473 | for (i = 0; i < s->num_extents; i++) { |
474 | if (rs->extents_using_bs_file[i]) { | |
475 | s->extents[i].file = state->bs->file; | |
476 | } | |
477 | } | |
478 | ||
479 | vmdk_reopen_clean(state); | |
480 | } | |
481 | ||
482 | static void vmdk_reopen_abort(BDRVReopenState *state) | |
483 | { | |
484 | vmdk_reopen_clean(state); | |
485 | } | |
486 | ||
1f051dcb | 487 | static int GRAPH_RDLOCK vmdk_parent_open(BlockDriverState *bs) |
5f4da8c0 | 488 | { |
5fafdf24 | 489 | char *p_name; |
71968dbf | 490 | char *desc; |
e1da9b24 | 491 | BDRVVmdkState *s = bs->opaque; |
588b65a3 | 492 | int ret; |
5f4da8c0 | 493 | |
71968dbf | 494 | desc = g_malloc0(DESC_SIZE + 1); |
32cc71de | 495 | ret = bdrv_pread(bs->file, s->desc_offset, DESC_SIZE, desc, 0); |
588b65a3 | 496 | if (ret < 0) { |
71968dbf | 497 | goto out; |
e1da9b24 | 498 | } |
5f4da8c0 | 499 | |
ae261c86 FZ |
500 | p_name = strstr(desc, "parentFileNameHint"); |
501 | if (p_name != NULL) { | |
5f4da8c0 | 502 | char *end_name; |
5f4da8c0 TS |
503 | |
504 | p_name += sizeof("parentFileNameHint") + 1; | |
ae261c86 FZ |
505 | end_name = strchr(p_name, '\"'); |
506 | if (end_name == NULL) { | |
71968dbf FZ |
507 | ret = -EINVAL; |
508 | goto out; | |
ae261c86 | 509 | } |
998c2019 | 510 | if ((end_name - p_name) > sizeof(bs->auto_backing_file) - 1) { |
71968dbf FZ |
511 | ret = -EINVAL; |
512 | goto out; | |
ae261c86 | 513 | } |
3b46e624 | 514 | |
998c2019 HR |
515 | pstrcpy(bs->auto_backing_file, end_name - p_name + 1, p_name); |
516 | pstrcpy(bs->backing_file, sizeof(bs->backing_file), | |
517 | bs->auto_backing_file); | |
7502be83 SE |
518 | pstrcpy(bs->backing_format, sizeof(bs->backing_format), |
519 | "vmdk"); | |
ff1afc72 | 520 | } |
5f4da8c0 | 521 | |
71968dbf FZ |
522 | out: |
523 | g_free(desc); | |
524 | return ret; | |
5f4da8c0 TS |
525 | } |
526 | ||
b3976d3c FZ |
527 | /* Create and append extent to the extent array. Return the added VmdkExtent |
528 | * address. return NULL if allocation failed. */ | |
8aa1331c | 529 | static int vmdk_add_extent(BlockDriverState *bs, |
24bc15d1 | 530 | BdrvChild *file, bool flat, int64_t sectors, |
b3976d3c FZ |
531 | int64_t l1_offset, int64_t l1_backup_offset, |
532 | uint32_t l1_size, | |
8aa1331c | 533 | int l2_size, uint64_t cluster_sectors, |
4823970b FZ |
534 | VmdkExtent **new_extent, |
535 | Error **errp) | |
b3976d3c FZ |
536 | { |
537 | VmdkExtent *extent; | |
538 | BDRVVmdkState *s = bs->opaque; | |
0a156f7c | 539 | int64_t nb_sectors; |
b3976d3c | 540 | |
8aa1331c FZ |
541 | if (cluster_sectors > 0x200000) { |
542 | /* 0x200000 * 512Bytes = 1GB for one cluster is unrealistic */ | |
4823970b FZ |
543 | error_setg(errp, "Invalid granularity, image may be corrupt"); |
544 | return -EFBIG; | |
8aa1331c | 545 | } |
59d6ee48 | 546 | if (l1_size > 32 * 1024 * 1024) { |
940a2cd5 SE |
547 | /* |
548 | * Although with big capacity and small l1_entry_sectors, we can get a | |
b0651b8c | 549 | * big l1_size, we don't want unbounded value to allocate the table. |
59d6ee48 SE |
550 | * Limit it to 32M, which is enough to store: |
551 | * 8TB - for both VMDK3 & VMDK4 with | |
552 | * minimal cluster size: 512B | |
553 | * minimal L2 table size: 512 entries | |
554 | * 8 TB is still more than the maximal value supported for | |
555 | * VMDK3 & VMDK4 which is 2TB. | |
98eb9733 SE |
556 | * 64TB - for "ESXi seSparse Extent" |
557 | * minimal cluster size: 512B (default is 4KB) | |
558 | * L2 table size: 4096 entries (const). | |
559 | * 64TB is more than the maximal value supported for | |
560 | * seSparse VMDKs (which is slightly less than 64TB) | |
940a2cd5 | 561 | */ |
4823970b | 562 | error_setg(errp, "L1 size too big"); |
b0651b8c FZ |
563 | return -EFBIG; |
564 | } | |
8aa1331c | 565 | |
24bc15d1 | 566 | nb_sectors = bdrv_nb_sectors(file->bs); |
0a156f7c MA |
567 | if (nb_sectors < 0) { |
568 | return nb_sectors; | |
c6ac36e1 FZ |
569 | } |
570 | ||
5839e53b | 571 | s->extents = g_renew(VmdkExtent, s->extents, s->num_extents + 1); |
b3976d3c FZ |
572 | extent = &s->extents[s->num_extents]; |
573 | s->num_extents++; | |
574 | ||
575 | memset(extent, 0, sizeof(VmdkExtent)); | |
576 | extent->file = file; | |
577 | extent->flat = flat; | |
578 | extent->sectors = sectors; | |
579 | extent->l1_table_offset = l1_offset; | |
580 | extent->l1_backup_table_offset = l1_backup_offset; | |
581 | extent->l1_size = l1_size; | |
582 | extent->l1_entry_sectors = l2_size * cluster_sectors; | |
583 | extent->l2_size = l2_size; | |
301c7d38 | 584 | extent->cluster_sectors = flat ? sectors : cluster_sectors; |
0a156f7c | 585 | extent->next_cluster_sector = ROUND_UP(nb_sectors, cluster_sectors); |
98eb9733 | 586 | extent->entry_size = sizeof(uint32_t); |
b3976d3c FZ |
587 | |
588 | if (s->num_extents > 1) { | |
589 | extent->end_sector = (*(extent - 1)).end_sector + extent->sectors; | |
590 | } else { | |
591 | extent->end_sector = extent->sectors; | |
592 | } | |
593 | bs->total_sectors = extent->end_sector; | |
8aa1331c FZ |
594 | if (new_extent) { |
595 | *new_extent = extent; | |
596 | } | |
597 | return 0; | |
b3976d3c FZ |
598 | } |
599 | ||
b7cfc7d5 KW |
600 | static int GRAPH_RDLOCK |
601 | vmdk_init_tables(BlockDriverState *bs, VmdkExtent *extent, Error **errp) | |
5f4da8c0 | 602 | { |
b4b3ab14 | 603 | int ret; |
13c4941c FZ |
604 | size_t l1_size; |
605 | int i; | |
5f4da8c0 | 606 | |
ea2384d3 | 607 | /* read the L1 table */ |
98eb9733 | 608 | l1_size = extent->l1_size * extent->entry_size; |
d6e59931 KW |
609 | extent->l1_table = g_try_malloc(l1_size); |
610 | if (l1_size && extent->l1_table == NULL) { | |
611 | return -ENOMEM; | |
612 | } | |
613 | ||
32cc71de AF |
614 | ret = bdrv_pread(extent->file, extent->l1_table_offset, l1_size, |
615 | extent->l1_table, 0); | |
b4b3ab14 | 616 | if (ret < 0) { |
f30c66ba | 617 | bdrv_refresh_filename(extent->file->bs); |
4823970b FZ |
618 | error_setg_errno(errp, -ret, |
619 | "Could not read l1 table from extent '%s'", | |
24bc15d1 | 620 | extent->file->bs->filename); |
b4b3ab14 | 621 | goto fail_l1; |
b3976d3c FZ |
622 | } |
623 | for (i = 0; i < extent->l1_size; i++) { | |
98eb9733 SE |
624 | if (extent->entry_size == sizeof(uint64_t)) { |
625 | le64_to_cpus((uint64_t *)extent->l1_table + i); | |
626 | } else { | |
627 | assert(extent->entry_size == sizeof(uint32_t)); | |
628 | le32_to_cpus((uint32_t *)extent->l1_table + i); | |
629 | } | |
ea2384d3 FB |
630 | } |
631 | ||
b3976d3c | 632 | if (extent->l1_backup_table_offset) { |
98eb9733 | 633 | assert(!extent->sesparse); |
d6e59931 KW |
634 | extent->l1_backup_table = g_try_malloc(l1_size); |
635 | if (l1_size && extent->l1_backup_table == NULL) { | |
636 | ret = -ENOMEM; | |
637 | goto fail_l1; | |
638 | } | |
53fb7844 | 639 | ret = bdrv_pread(extent->file, extent->l1_backup_table_offset, |
32cc71de | 640 | l1_size, extent->l1_backup_table, 0); |
b4b3ab14 | 641 | if (ret < 0) { |
f30c66ba | 642 | bdrv_refresh_filename(extent->file->bs); |
4823970b FZ |
643 | error_setg_errno(errp, -ret, |
644 | "Could not read l1 backup table from extent '%s'", | |
24bc15d1 | 645 | extent->file->bs->filename); |
b4b3ab14 | 646 | goto fail_l1b; |
b3976d3c FZ |
647 | } |
648 | for (i = 0; i < extent->l1_size; i++) { | |
649 | le32_to_cpus(&extent->l1_backup_table[i]); | |
ff1afc72 FB |
650 | } |
651 | } | |
652 | ||
b3976d3c | 653 | extent->l2_cache = |
98eb9733 | 654 | g_malloc(extent->entry_size * extent->l2_size * L2_CACHE_SIZE); |
ea2384d3 | 655 | return 0; |
b4b3ab14 | 656 | fail_l1b: |
7267c094 | 657 | g_free(extent->l1_backup_table); |
b4b3ab14 | 658 | fail_l1: |
7267c094 | 659 | g_free(extent->l1_table); |
b4b3ab14 FZ |
660 | return ret; |
661 | } | |
662 | ||
b7cfc7d5 KW |
663 | static int GRAPH_RDLOCK |
664 | vmdk_open_vmfs_sparse(BlockDriverState *bs, BdrvChild *file, int flags, | |
665 | Error **errp) | |
b4b3ab14 FZ |
666 | { |
667 | int ret; | |
668 | uint32_t magic; | |
669 | VMDK3Header header; | |
cd466702 | 670 | VmdkExtent *extent = NULL; |
b4b3ab14 | 671 | |
32cc71de | 672 | ret = bdrv_pread(file, sizeof(magic), sizeof(header), &header, 0); |
b4b3ab14 | 673 | if (ret < 0) { |
f30c66ba | 674 | bdrv_refresh_filename(file->bs); |
4823970b FZ |
675 | error_setg_errno(errp, -ret, |
676 | "Could not read header from file '%s'", | |
24bc15d1 | 677 | file->bs->filename); |
86c6b429 | 678 | return ret; |
b4b3ab14 | 679 | } |
f6b61e54 FZ |
680 | ret = vmdk_add_extent(bs, file, false, |
681 | le32_to_cpu(header.disk_sectors), | |
7237aecd | 682 | (int64_t)le32_to_cpu(header.l1dir_offset) << 9, |
f6b61e54 FZ |
683 | 0, |
684 | le32_to_cpu(header.l1dir_size), | |
685 | 4096, | |
686 | le32_to_cpu(header.granularity), | |
4823970b FZ |
687 | &extent, |
688 | errp); | |
8aa1331c FZ |
689 | if (ret < 0) { |
690 | return ret; | |
691 | } | |
4823970b | 692 | ret = vmdk_init_tables(bs, extent, errp); |
b4b3ab14 | 693 | if (ret) { |
86c6b429 FZ |
694 | /* free extent allocated by vmdk_add_extent */ |
695 | vmdk_free_last_extent(bs); | |
b4b3ab14 | 696 | } |
b4b3ab14 FZ |
697 | return ret; |
698 | } | |
699 | ||
98eb9733 SE |
700 | #define SESPARSE_CONST_HEADER_MAGIC UINT64_C(0x00000000cafebabe) |
701 | #define SESPARSE_VOLATILE_HEADER_MAGIC UINT64_C(0x00000000cafecafe) | |
702 | ||
703 | /* Strict checks - format not officially documented */ | |
704 | static int check_se_sparse_const_header(VMDKSESparseConstHeader *header, | |
705 | Error **errp) | |
706 | { | |
707 | header->magic = le64_to_cpu(header->magic); | |
708 | header->version = le64_to_cpu(header->version); | |
709 | header->grain_size = le64_to_cpu(header->grain_size); | |
710 | header->grain_table_size = le64_to_cpu(header->grain_table_size); | |
711 | header->flags = le64_to_cpu(header->flags); | |
712 | header->reserved1 = le64_to_cpu(header->reserved1); | |
713 | header->reserved2 = le64_to_cpu(header->reserved2); | |
714 | header->reserved3 = le64_to_cpu(header->reserved3); | |
715 | header->reserved4 = le64_to_cpu(header->reserved4); | |
716 | ||
717 | header->volatile_header_offset = | |
718 | le64_to_cpu(header->volatile_header_offset); | |
719 | header->volatile_header_size = le64_to_cpu(header->volatile_header_size); | |
720 | ||
721 | header->journal_header_offset = le64_to_cpu(header->journal_header_offset); | |
722 | header->journal_header_size = le64_to_cpu(header->journal_header_size); | |
723 | ||
724 | header->journal_offset = le64_to_cpu(header->journal_offset); | |
725 | header->journal_size = le64_to_cpu(header->journal_size); | |
726 | ||
727 | header->grain_dir_offset = le64_to_cpu(header->grain_dir_offset); | |
728 | header->grain_dir_size = le64_to_cpu(header->grain_dir_size); | |
729 | ||
730 | header->grain_tables_offset = le64_to_cpu(header->grain_tables_offset); | |
731 | header->grain_tables_size = le64_to_cpu(header->grain_tables_size); | |
732 | ||
733 | header->free_bitmap_offset = le64_to_cpu(header->free_bitmap_offset); | |
734 | header->free_bitmap_size = le64_to_cpu(header->free_bitmap_size); | |
735 | ||
736 | header->backmap_offset = le64_to_cpu(header->backmap_offset); | |
737 | header->backmap_size = le64_to_cpu(header->backmap_size); | |
738 | ||
739 | header->grains_offset = le64_to_cpu(header->grains_offset); | |
740 | header->grains_size = le64_to_cpu(header->grains_size); | |
741 | ||
742 | if (header->magic != SESPARSE_CONST_HEADER_MAGIC) { | |
743 | error_setg(errp, "Bad const header magic: 0x%016" PRIx64, | |
744 | header->magic); | |
745 | return -EINVAL; | |
746 | } | |
747 | ||
748 | if (header->version != 0x0000000200000001) { | |
749 | error_setg(errp, "Unsupported version: 0x%016" PRIx64, | |
750 | header->version); | |
751 | return -ENOTSUP; | |
752 | } | |
753 | ||
754 | if (header->grain_size != 8) { | |
755 | error_setg(errp, "Unsupported grain size: %" PRIu64, | |
756 | header->grain_size); | |
757 | return -ENOTSUP; | |
758 | } | |
759 | ||
760 | if (header->grain_table_size != 64) { | |
761 | error_setg(errp, "Unsupported grain table size: %" PRIu64, | |
762 | header->grain_table_size); | |
763 | return -ENOTSUP; | |
764 | } | |
765 | ||
766 | if (header->flags != 0) { | |
767 | error_setg(errp, "Unsupported flags: 0x%016" PRIx64, | |
768 | header->flags); | |
769 | return -ENOTSUP; | |
770 | } | |
771 | ||
772 | if (header->reserved1 != 0 || header->reserved2 != 0 || | |
773 | header->reserved3 != 0 || header->reserved4 != 0) { | |
774 | error_setg(errp, "Unsupported reserved bits:" | |
775 | " 0x%016" PRIx64 " 0x%016" PRIx64 | |
776 | " 0x%016" PRIx64 " 0x%016" PRIx64, | |
777 | header->reserved1, header->reserved2, | |
778 | header->reserved3, header->reserved4); | |
779 | return -ENOTSUP; | |
780 | } | |
781 | ||
782 | /* check that padding is 0 */ | |
783 | if (!buffer_is_zero(header->pad, sizeof(header->pad))) { | |
784 | error_setg(errp, "Unsupported non-zero const header padding"); | |
785 | return -ENOTSUP; | |
786 | } | |
787 | ||
788 | return 0; | |
789 | } | |
790 | ||
791 | static int check_se_sparse_volatile_header(VMDKSESparseVolatileHeader *header, | |
792 | Error **errp) | |
793 | { | |
794 | header->magic = le64_to_cpu(header->magic); | |
795 | header->free_gt_number = le64_to_cpu(header->free_gt_number); | |
796 | header->next_txn_seq_number = le64_to_cpu(header->next_txn_seq_number); | |
797 | header->replay_journal = le64_to_cpu(header->replay_journal); | |
798 | ||
799 | if (header->magic != SESPARSE_VOLATILE_HEADER_MAGIC) { | |
800 | error_setg(errp, "Bad volatile header magic: 0x%016" PRIx64, | |
801 | header->magic); | |
802 | return -EINVAL; | |
803 | } | |
804 | ||
805 | if (header->replay_journal) { | |
806 | error_setg(errp, "Image is dirty, Replaying journal not supported"); | |
807 | return -ENOTSUP; | |
808 | } | |
809 | ||
810 | /* check that padding is 0 */ | |
811 | if (!buffer_is_zero(header->pad, sizeof(header->pad))) { | |
812 | error_setg(errp, "Unsupported non-zero volatile header padding"); | |
813 | return -ENOTSUP; | |
814 | } | |
815 | ||
816 | return 0; | |
817 | } | |
818 | ||
b7cfc7d5 KW |
819 | static int GRAPH_RDLOCK |
820 | vmdk_open_se_sparse(BlockDriverState *bs, BdrvChild *file, int flags, | |
821 | Error **errp) | |
98eb9733 SE |
822 | { |
823 | int ret; | |
824 | VMDKSESparseConstHeader const_header; | |
825 | VMDKSESparseVolatileHeader volatile_header; | |
cd466702 | 826 | VmdkExtent *extent = NULL; |
98eb9733 SE |
827 | |
828 | ret = bdrv_apply_auto_read_only(bs, | |
829 | "No write support for seSparse images available", errp); | |
830 | if (ret < 0) { | |
831 | return ret; | |
832 | } | |
833 | ||
834 | assert(sizeof(const_header) == SECTOR_SIZE); | |
835 | ||
32cc71de | 836 | ret = bdrv_pread(file, 0, sizeof(const_header), &const_header, 0); |
98eb9733 SE |
837 | if (ret < 0) { |
838 | bdrv_refresh_filename(file->bs); | |
839 | error_setg_errno(errp, -ret, | |
840 | "Could not read const header from file '%s'", | |
841 | file->bs->filename); | |
842 | return ret; | |
843 | } | |
844 | ||
845 | /* check const header */ | |
846 | ret = check_se_sparse_const_header(&const_header, errp); | |
847 | if (ret < 0) { | |
848 | return ret; | |
849 | } | |
850 | ||
851 | assert(sizeof(volatile_header) == SECTOR_SIZE); | |
852 | ||
53fb7844 | 853 | ret = bdrv_pread(file, const_header.volatile_header_offset * SECTOR_SIZE, |
32cc71de | 854 | sizeof(volatile_header), &volatile_header, 0); |
98eb9733 SE |
855 | if (ret < 0) { |
856 | bdrv_refresh_filename(file->bs); | |
857 | error_setg_errno(errp, -ret, | |
858 | "Could not read volatile header from file '%s'", | |
859 | file->bs->filename); | |
860 | return ret; | |
861 | } | |
862 | ||
863 | /* check volatile header */ | |
864 | ret = check_se_sparse_volatile_header(&volatile_header, errp); | |
865 | if (ret < 0) { | |
866 | return ret; | |
867 | } | |
868 | ||
869 | ret = vmdk_add_extent(bs, file, false, | |
870 | const_header.capacity, | |
871 | const_header.grain_dir_offset * SECTOR_SIZE, | |
872 | 0, | |
873 | const_header.grain_dir_size * | |
874 | SECTOR_SIZE / sizeof(uint64_t), | |
875 | const_header.grain_table_size * | |
876 | SECTOR_SIZE / sizeof(uint64_t), | |
877 | const_header.grain_size, | |
878 | &extent, | |
879 | errp); | |
880 | if (ret < 0) { | |
881 | return ret; | |
882 | } | |
883 | ||
884 | extent->sesparse = true; | |
885 | extent->sesparse_l2_tables_offset = const_header.grain_tables_offset; | |
886 | extent->sesparse_clusters_offset = const_header.grains_offset; | |
887 | extent->entry_size = sizeof(uint64_t); | |
888 | ||
889 | ret = vmdk_init_tables(bs, extent, errp); | |
890 | if (ret) { | |
891 | /* free extent allocated by vmdk_add_extent */ | |
892 | vmdk_free_last_extent(bs); | |
893 | } | |
894 | ||
895 | return ret; | |
896 | } | |
897 | ||
d1833ef5 | 898 | static int vmdk_open_desc_file(BlockDriverState *bs, int flags, char *buf, |
a6468367 | 899 | QDict *options, Error **errp); |
f16f509d | 900 | |
cf2ab8fc | 901 | static char *vmdk_read_desc(BdrvChild *file, uint64_t desc_offset, Error **errp) |
a8842e6d PB |
902 | { |
903 | int64_t size; | |
904 | char *buf; | |
905 | int ret; | |
906 | ||
cf2ab8fc | 907 | size = bdrv_getlength(file->bs); |
a8842e6d PB |
908 | if (size < 0) { |
909 | error_setg_errno(errp, -size, "Could not access file"); | |
910 | return NULL; | |
911 | } | |
912 | ||
03c3359d FZ |
913 | if (size < 4) { |
914 | /* Both descriptor file and sparse image must be much larger than 4 | |
915 | * bytes, also callers of vmdk_read_desc want to compare the first 4 | |
916 | * bytes with VMDK4_MAGIC, let's error out if less is read. */ | |
917 | error_setg(errp, "File is too small, not a valid image"); | |
918 | return NULL; | |
919 | } | |
920 | ||
73b7bcad FZ |
921 | size = MIN(size, (1 << 20) - 1); /* avoid unbounded allocation */ |
922 | buf = g_malloc(size + 1); | |
a8842e6d | 923 | |
32cc71de | 924 | ret = bdrv_pread(file, desc_offset, size, buf, 0); |
a8842e6d PB |
925 | if (ret < 0) { |
926 | error_setg_errno(errp, -ret, "Could not read from file"); | |
927 | g_free(buf); | |
928 | return NULL; | |
929 | } | |
353a5d84 | 930 | buf[size] = 0; |
a8842e6d PB |
931 | |
932 | return buf; | |
933 | } | |
934 | ||
b7cfc7d5 KW |
935 | static int GRAPH_RDLOCK |
936 | vmdk_open_vmdk4(BlockDriverState *bs, BdrvChild *file, int flags, | |
937 | QDict *options, Error **errp) | |
b4b3ab14 FZ |
938 | { |
939 | int ret; | |
940 | uint32_t magic; | |
941 | uint32_t l1_size, l1_entry_sectors; | |
942 | VMDK4Header header; | |
cd466702 | 943 | VmdkExtent *extent = NULL; |
f4c129a3 | 944 | BDRVVmdkState *s = bs->opaque; |
bb45ded9 | 945 | int64_t l1_backup_offset = 0; |
3db1d98a | 946 | bool compressed; |
b4b3ab14 | 947 | |
32cc71de | 948 | ret = bdrv_pread(file, sizeof(magic), sizeof(header), &header, 0); |
b4b3ab14 | 949 | if (ret < 0) { |
f30c66ba | 950 | bdrv_refresh_filename(file->bs); |
4823970b FZ |
951 | error_setg_errno(errp, -ret, |
952 | "Could not read header from file '%s'", | |
24bc15d1 | 953 | file->bs->filename); |
89ac8480 | 954 | return -EINVAL; |
b4b3ab14 | 955 | } |
5a394b9e | 956 | if (header.capacity == 0) { |
e98768d4 | 957 | uint64_t desc_offset = le64_to_cpu(header.desc_offset); |
5a394b9e | 958 | if (desc_offset) { |
cf2ab8fc | 959 | char *buf = vmdk_read_desc(file, desc_offset << 9, errp); |
d1833ef5 PB |
960 | if (!buf) { |
961 | return -EINVAL; | |
962 | } | |
a6468367 | 963 | ret = vmdk_open_desc_file(bs, flags, buf, options, errp); |
d1833ef5 PB |
964 | g_free(buf); |
965 | return ret; | |
5a394b9e | 966 | } |
f16f509d | 967 | } |
65bd155c | 968 | |
f4c129a3 FZ |
969 | if (!s->create_type) { |
970 | s->create_type = g_strdup("monolithicSparse"); | |
971 | } | |
972 | ||
65bd155c KW |
973 | if (le64_to_cpu(header.gd_offset) == VMDK4_GD_AT_END) { |
974 | /* | |
975 | * The footer takes precedence over the header, so read it in. The | |
976 | * footer starts at offset -1024 from the end: One sector for the | |
977 | * footer, and another one for the end-of-stream marker. | |
978 | */ | |
979 | struct { | |
980 | struct { | |
981 | uint64_t val; | |
982 | uint32_t size; | |
983 | uint32_t type; | |
984 | uint8_t pad[512 - 16]; | |
985 | } QEMU_PACKED footer_marker; | |
986 | ||
987 | uint32_t magic; | |
988 | VMDK4Header header; | |
989 | uint8_t pad[512 - 4 - sizeof(VMDK4Header)]; | |
990 | ||
991 | struct { | |
992 | uint64_t val; | |
993 | uint32_t size; | |
994 | uint32_t type; | |
995 | uint8_t pad[512 - 16]; | |
996 | } QEMU_PACKED eos_marker; | |
997 | } QEMU_PACKED footer; | |
998 | ||
53fb7844 | 999 | ret = bdrv_pread(file, bs->file->bs->total_sectors * 512 - 1536, |
32cc71de | 1000 | sizeof(footer), &footer, 0); |
65bd155c | 1001 | if (ret < 0) { |
d899d2e2 | 1002 | error_setg_errno(errp, -ret, "Failed to read footer"); |
65bd155c KW |
1003 | return ret; |
1004 | } | |
1005 | ||
1006 | /* Some sanity checks for the footer */ | |
1007 | if (be32_to_cpu(footer.magic) != VMDK4_MAGIC || | |
1008 | le32_to_cpu(footer.footer_marker.size) != 0 || | |
1009 | le32_to_cpu(footer.footer_marker.type) != MARKER_FOOTER || | |
1010 | le64_to_cpu(footer.eos_marker.val) != 0 || | |
1011 | le32_to_cpu(footer.eos_marker.size) != 0 || | |
1012 | le32_to_cpu(footer.eos_marker.type) != MARKER_END_OF_STREAM) | |
1013 | { | |
d899d2e2 | 1014 | error_setg(errp, "Invalid footer"); |
65bd155c KW |
1015 | return -EINVAL; |
1016 | } | |
1017 | ||
1018 | header = footer.header; | |
1019 | } | |
1020 | ||
3db1d98a FZ |
1021 | compressed = |
1022 | le16_to_cpu(header.compressAlgorithm) == VMDK4_COMPRESSION_DEFLATE; | |
509d39aa | 1023 | if (le32_to_cpu(header.version) > 3) { |
a55448b3 HR |
1024 | error_setg(errp, "Unsupported VMDK version %" PRIu32, |
1025 | le32_to_cpu(header.version)); | |
96c51eb5 | 1026 | return -ENOTSUP; |
3db1d98a FZ |
1027 | } else if (le32_to_cpu(header.version) == 3 && (flags & BDRV_O_RDWR) && |
1028 | !compressed) { | |
509d39aa FZ |
1029 | /* VMware KB 2064959 explains that version 3 added support for |
1030 | * persistent changed block tracking (CBT), and backup software can | |
1031 | * read it as version=1 if it doesn't care about the changed area | |
1032 | * information. So we are safe to enable read only. */ | |
1033 | error_setg(errp, "VMDK version 3 must be read only"); | |
1034 | return -EINVAL; | |
96c51eb5 FZ |
1035 | } |
1036 | ||
ca8804ce | 1037 | if (le32_to_cpu(header.num_gtes_per_gt) > 512) { |
89ac8480 | 1038 | error_setg(errp, "L2 table size too big"); |
f8ce0403 FZ |
1039 | return -EINVAL; |
1040 | } | |
1041 | ||
ca8804ce | 1042 | l1_entry_sectors = le32_to_cpu(header.num_gtes_per_gt) |
b4b3ab14 | 1043 | * le64_to_cpu(header.granularity); |
75d12341 | 1044 | if (l1_entry_sectors == 0) { |
d899d2e2 | 1045 | error_setg(errp, "L1 entry size is invalid"); |
86c6b429 FZ |
1046 | return -EINVAL; |
1047 | } | |
b4b3ab14 FZ |
1048 | l1_size = (le64_to_cpu(header.capacity) + l1_entry_sectors - 1) |
1049 | / l1_entry_sectors; | |
bb45ded9 FZ |
1050 | if (le32_to_cpu(header.flags) & VMDK4_FLAG_RGD) { |
1051 | l1_backup_offset = le64_to_cpu(header.rgd_offset) << 9; | |
1052 | } | |
24bc15d1 | 1053 | if (bdrv_nb_sectors(file->bs) < le64_to_cpu(header.grain_offset)) { |
4ab9dab5 FZ |
1054 | error_setg(errp, "File truncated, expecting at least %" PRId64 " bytes", |
1055 | (int64_t)(le64_to_cpu(header.grain_offset) | |
1056 | * BDRV_SECTOR_SIZE)); | |
34ceed81 FZ |
1057 | return -EINVAL; |
1058 | } | |
1059 | ||
8aa1331c | 1060 | ret = vmdk_add_extent(bs, file, false, |
b4b3ab14 FZ |
1061 | le64_to_cpu(header.capacity), |
1062 | le64_to_cpu(header.gd_offset) << 9, | |
bb45ded9 | 1063 | l1_backup_offset, |
b4b3ab14 | 1064 | l1_size, |
ca8804ce | 1065 | le32_to_cpu(header.num_gtes_per_gt), |
8aa1331c | 1066 | le64_to_cpu(header.granularity), |
4823970b FZ |
1067 | &extent, |
1068 | errp); | |
8aa1331c FZ |
1069 | if (ret < 0) { |
1070 | return ret; | |
1071 | } | |
432bb170 FZ |
1072 | extent->compressed = |
1073 | le16_to_cpu(header.compressAlgorithm) == VMDK4_COMPRESSION_DEFLATE; | |
d8a7b061 FZ |
1074 | if (extent->compressed) { |
1075 | g_free(s->create_type); | |
1076 | s->create_type = g_strdup("streamOptimized"); | |
1077 | } | |
432bb170 | 1078 | extent->has_marker = le32_to_cpu(header.flags) & VMDK4_FLAG_MARKER; |
14ead646 FZ |
1079 | extent->version = le32_to_cpu(header.version); |
1080 | extent->has_zero_grain = le32_to_cpu(header.flags) & VMDK4_FLAG_ZERO_GRAIN; | |
4823970b | 1081 | ret = vmdk_init_tables(bs, extent, errp); |
b4b3ab14 | 1082 | if (ret) { |
86c6b429 FZ |
1083 | /* free extent allocated by vmdk_add_extent */ |
1084 | vmdk_free_last_extent(bs); | |
b4b3ab14 | 1085 | } |
b4b3ab14 FZ |
1086 | return ret; |
1087 | } | |
1088 | ||
7fa60fa3 FZ |
1089 | /* find an option value out of descriptor file */ |
1090 | static int vmdk_parse_description(const char *desc, const char *opt_name, | |
1091 | char *buf, int buf_size) | |
1092 | { | |
1093 | char *opt_pos, *opt_end; | |
1094 | const char *end = desc + strlen(desc); | |
1095 | ||
1096 | opt_pos = strstr(desc, opt_name); | |
1097 | if (!opt_pos) { | |
65f74725 | 1098 | return VMDK_ERROR; |
7fa60fa3 FZ |
1099 | } |
1100 | /* Skip "=\"" following opt_name */ | |
1101 | opt_pos += strlen(opt_name) + 2; | |
1102 | if (opt_pos >= end) { | |
65f74725 | 1103 | return VMDK_ERROR; |
7fa60fa3 FZ |
1104 | } |
1105 | opt_end = opt_pos; | |
1106 | while (opt_end < end && *opt_end != '"') { | |
1107 | opt_end++; | |
1108 | } | |
1109 | if (opt_end == end || buf_size < opt_end - opt_pos + 1) { | |
65f74725 | 1110 | return VMDK_ERROR; |
7fa60fa3 FZ |
1111 | } |
1112 | pstrcpy(buf, opt_end - opt_pos + 1, opt_pos); | |
65f74725 | 1113 | return VMDK_OK; |
7fa60fa3 FZ |
1114 | } |
1115 | ||
86c6b429 | 1116 | /* Open an extent file and append to bs array */ |
b7cfc7d5 KW |
1117 | static int GRAPH_RDLOCK |
1118 | vmdk_open_sparse(BlockDriverState *bs, BdrvChild *file, int flags, | |
1119 | char *buf, QDict *options, Error **errp) | |
86c6b429 FZ |
1120 | { |
1121 | uint32_t magic; | |
1122 | ||
d1833ef5 | 1123 | magic = ldl_be_p(buf); |
86c6b429 FZ |
1124 | switch (magic) { |
1125 | case VMDK3_MAGIC: | |
4823970b | 1126 | return vmdk_open_vmfs_sparse(bs, file, flags, errp); |
86c6b429 | 1127 | case VMDK4_MAGIC: |
a6468367 | 1128 | return vmdk_open_vmdk4(bs, file, flags, options, errp); |
86c6b429 | 1129 | default: |
76abe407 PB |
1130 | error_setg(errp, "Image not in VMDK format"); |
1131 | return -EINVAL; | |
86c6b429 FZ |
1132 | } |
1133 | } | |
1134 | ||
e4937694 MA |
1135 | static const char *next_line(const char *s) |
1136 | { | |
1137 | while (*s) { | |
1138 | if (*s == '\n') { | |
1139 | return s + 1; | |
1140 | } | |
1141 | s++; | |
1142 | } | |
1143 | return s; | |
1144 | } | |
1145 | ||
b7cfc7d5 KW |
1146 | static int GRAPH_RDLOCK |
1147 | vmdk_parse_extents(const char *desc, BlockDriverState *bs, QDict *options, | |
1148 | Error **errp) | |
7fa60fa3 FZ |
1149 | { |
1150 | int ret; | |
395a22fa | 1151 | int matches; |
7fa60fa3 FZ |
1152 | char access[11]; |
1153 | char type[11]; | |
1154 | char fname[512]; | |
d28d737f | 1155 | const char *p, *np; |
7fa60fa3 FZ |
1156 | int64_t sectors = 0; |
1157 | int64_t flat_offset; | |
cdc0dd25 | 1158 | char *desc_file_dir = NULL; |
fe206562 | 1159 | char *extent_path; |
24bc15d1 | 1160 | BdrvChild *extent_file; |
8b1869da | 1161 | BdrvChildRole extent_role; |
f4c129a3 | 1162 | BDRVVmdkState *s = bs->opaque; |
cd466702 | 1163 | VmdkExtent *extent = NULL; |
a6468367 | 1164 | char extent_opt_prefix[32]; |
24bc15d1 | 1165 | Error *local_err = NULL; |
7fa60fa3 | 1166 | |
b7cfc7d5 KW |
1167 | GLOBAL_STATE_CODE(); |
1168 | ||
e4937694 | 1169 | for (p = desc; *p; p = next_line(p)) { |
8a3e0bc3 FZ |
1170 | /* parse extent line in one of below formats: |
1171 | * | |
7fa60fa3 | 1172 | * RW [size in sectors] FLAT "file-name.vmdk" OFFSET |
7fa60fa3 | 1173 | * RW [size in sectors] SPARSE "file-name.vmdk" |
8a3e0bc3 FZ |
1174 | * RW [size in sectors] VMFS "file-name.vmdk" |
1175 | * RW [size in sectors] VMFSSPARSE "file-name.vmdk" | |
98eb9733 | 1176 | * RW [size in sectors] SESPARSE "file-name.vmdk" |
7fa60fa3 FZ |
1177 | */ |
1178 | flat_offset = -1; | |
395a22fa JC |
1179 | matches = sscanf(p, "%10s %" SCNd64 " %10s \"%511[^\n\r\"]\" %" SCNd64, |
1180 | access, §ors, type, fname, &flat_offset); | |
1181 | if (matches < 4 || strcmp(access, "RW")) { | |
e4937694 | 1182 | continue; |
7fa60fa3 | 1183 | } else if (!strcmp(type, "FLAT")) { |
395a22fa | 1184 | if (matches != 5 || flat_offset < 0) { |
d28d737f | 1185 | goto invalid; |
7fa60fa3 | 1186 | } |
dbbcaa8d | 1187 | } else if (!strcmp(type, "VMFS")) { |
395a22fa | 1188 | if (matches == 4) { |
b47053bd FZ |
1189 | flat_offset = 0; |
1190 | } else { | |
d28d737f | 1191 | goto invalid; |
b47053bd | 1192 | } |
395a22fa | 1193 | } else if (matches != 4) { |
d28d737f | 1194 | goto invalid; |
7fa60fa3 FZ |
1195 | } |
1196 | ||
7fa60fa3 | 1197 | if (sectors <= 0 || |
daac8fdc | 1198 | (strcmp(type, "FLAT") && strcmp(type, "SPARSE") && |
98eb9733 SE |
1199 | strcmp(type, "VMFS") && strcmp(type, "VMFSSPARSE") && |
1200 | strcmp(type, "SESPARSE")) || | |
7fa60fa3 | 1201 | (strcmp(access, "RW"))) { |
e4937694 | 1202 | continue; |
7fa60fa3 FZ |
1203 | } |
1204 | ||
cdc0dd25 HR |
1205 | if (path_is_absolute(fname)) { |
1206 | extent_path = g_strdup(fname); | |
1207 | } else { | |
1208 | if (!desc_file_dir) { | |
1209 | desc_file_dir = bdrv_dirname(bs->file->bs, errp); | |
1210 | if (!desc_file_dir) { | |
1211 | bdrv_refresh_filename(bs->file->bs); | |
1212 | error_prepend(errp, "Cannot use relative paths with VMDK " | |
1213 | "descriptor file '%s': ", | |
1214 | bs->file->bs->filename); | |
1215 | ret = -EINVAL; | |
1216 | goto out; | |
1217 | } | |
1218 | } | |
5c98415b | 1219 | |
cdc0dd25 HR |
1220 | extent_path = g_strconcat(desc_file_dir, fname, NULL); |
1221 | } | |
a6468367 KW |
1222 | |
1223 | ret = snprintf(extent_opt_prefix, 32, "extents.%d", s->num_extents); | |
1224 | assert(ret < 32); | |
1225 | ||
8b1869da HR |
1226 | extent_role = BDRV_CHILD_DATA; |
1227 | if (strcmp(type, "FLAT") != 0 && strcmp(type, "VMFS") != 0) { | |
1228 | /* non-flat extents have metadata */ | |
1229 | extent_role |= BDRV_CHILD_METADATA; | |
1230 | } | |
1231 | ||
24bc15d1 | 1232 | extent_file = bdrv_open_child(extent_path, options, extent_opt_prefix, |
8b1869da HR |
1233 | bs, &child_of_bds, extent_role, false, |
1234 | &local_err); | |
fe206562 | 1235 | g_free(extent_path); |
a8d99c0e | 1236 | if (!extent_file) { |
24bc15d1 | 1237 | error_propagate(errp, local_err); |
cdc0dd25 HR |
1238 | ret = -EINVAL; |
1239 | goto out; | |
86c6b429 FZ |
1240 | } |
1241 | ||
7fa60fa3 | 1242 | /* save to extents array */ |
04d542c8 | 1243 | if (!strcmp(type, "FLAT") || !strcmp(type, "VMFS")) { |
7fa60fa3 | 1244 | /* FLAT extent */ |
7fa60fa3 | 1245 | |
8aa1331c | 1246 | ret = vmdk_add_extent(bs, extent_file, true, sectors, |
4823970b | 1247 | 0, 0, 0, 0, 0, &extent, errp); |
8aa1331c | 1248 | if (ret < 0) { |
b7cfc7d5 | 1249 | bdrv_graph_rdunlock_main_loop(); |
6bc30f19 | 1250 | bdrv_graph_wrlock(); |
24bc15d1 | 1251 | bdrv_unref_child(bs, extent_file); |
6bc30f19 | 1252 | bdrv_graph_wrunlock(); |
b7cfc7d5 | 1253 | bdrv_graph_rdlock_main_loop(); |
cdc0dd25 | 1254 | goto out; |
8aa1331c | 1255 | } |
f16f509d | 1256 | extent->flat_start_offset = flat_offset << 9; |
daac8fdc FZ |
1257 | } else if (!strcmp(type, "SPARSE") || !strcmp(type, "VMFSSPARSE")) { |
1258 | /* SPARSE extent and VMFSSPARSE extent are both "COWD" sparse file*/ | |
cf2ab8fc | 1259 | char *buf = vmdk_read_desc(extent_file, 0, errp); |
d1833ef5 PB |
1260 | if (!buf) { |
1261 | ret = -EINVAL; | |
1262 | } else { | |
a6468367 KW |
1263 | ret = vmdk_open_sparse(bs, extent_file, bs->open_flags, buf, |
1264 | options, errp); | |
d1833ef5 | 1265 | } |
b6b1d31f | 1266 | g_free(buf); |
86c6b429 | 1267 | if (ret) { |
b7cfc7d5 | 1268 | bdrv_graph_rdunlock_main_loop(); |
6bc30f19 | 1269 | bdrv_graph_wrlock(); |
24bc15d1 | 1270 | bdrv_unref_child(bs, extent_file); |
6bc30f19 | 1271 | bdrv_graph_wrunlock(); |
b7cfc7d5 | 1272 | bdrv_graph_rdlock_main_loop(); |
cdc0dd25 | 1273 | goto out; |
86c6b429 | 1274 | } |
f4c129a3 | 1275 | extent = &s->extents[s->num_extents - 1]; |
98eb9733 SE |
1276 | } else if (!strcmp(type, "SESPARSE")) { |
1277 | ret = vmdk_open_se_sparse(bs, extent_file, bs->open_flags, errp); | |
1278 | if (ret) { | |
b7cfc7d5 | 1279 | bdrv_graph_rdunlock_main_loop(); |
6bc30f19 | 1280 | bdrv_graph_wrlock(); |
98eb9733 | 1281 | bdrv_unref_child(bs, extent_file); |
6bc30f19 | 1282 | bdrv_graph_wrunlock(); |
b7cfc7d5 | 1283 | bdrv_graph_rdlock_main_loop(); |
cdc0dd25 | 1284 | goto out; |
98eb9733 SE |
1285 | } |
1286 | extent = &s->extents[s->num_extents - 1]; | |
7fa60fa3 | 1287 | } else { |
4823970b | 1288 | error_setg(errp, "Unsupported extent type '%s'", type); |
b7cfc7d5 | 1289 | bdrv_graph_rdunlock_main_loop(); |
6bc30f19 | 1290 | bdrv_graph_wrlock(); |
24bc15d1 | 1291 | bdrv_unref_child(bs, extent_file); |
6bc30f19 | 1292 | bdrv_graph_wrunlock(); |
b7cfc7d5 | 1293 | bdrv_graph_rdlock_main_loop(); |
cdc0dd25 HR |
1294 | ret = -ENOTSUP; |
1295 | goto out; | |
7fa60fa3 | 1296 | } |
f4c129a3 | 1297 | extent->type = g_strdup(type); |
7fa60fa3 | 1298 | } |
cdc0dd25 HR |
1299 | |
1300 | ret = 0; | |
1301 | goto out; | |
d28d737f MA |
1302 | |
1303 | invalid: | |
1304 | np = next_line(p); | |
1305 | assert(np != p); | |
1306 | if (np[-1] == '\n') { | |
1307 | np--; | |
1308 | } | |
1309 | error_setg(errp, "Invalid extent line: %.*s", (int)(np - p), p); | |
cdc0dd25 HR |
1310 | ret = -EINVAL; |
1311 | ||
1312 | out: | |
1313 | g_free(desc_file_dir); | |
1314 | return ret; | |
7fa60fa3 FZ |
1315 | } |
1316 | ||
b7cfc7d5 KW |
1317 | static int GRAPH_RDLOCK |
1318 | vmdk_open_desc_file(BlockDriverState *bs, int flags, char *buf, QDict *options, | |
1319 | Error **errp) | |
7fa60fa3 FZ |
1320 | { |
1321 | int ret; | |
7fa60fa3 FZ |
1322 | char ct[128]; |
1323 | BDRVVmdkState *s = bs->opaque; | |
1324 | ||
7fa60fa3 | 1325 | if (vmdk_parse_description(buf, "createType", ct, sizeof(ct))) { |
76abe407 PB |
1326 | error_setg(errp, "invalid VMDK image descriptor"); |
1327 | ret = -EINVAL; | |
0bed087d | 1328 | goto exit; |
7fa60fa3 | 1329 | } |
6398de51 | 1330 | if (strcmp(ct, "monolithicFlat") && |
04d542c8 | 1331 | strcmp(ct, "vmfs") && |
daac8fdc | 1332 | strcmp(ct, "vmfsSparse") && |
98eb9733 | 1333 | strcmp(ct, "seSparse") && |
86c6b429 | 1334 | strcmp(ct, "twoGbMaxExtentSparse") && |
6398de51 | 1335 | strcmp(ct, "twoGbMaxExtentFlat")) { |
4823970b | 1336 | error_setg(errp, "Unsupported image type '%s'", ct); |
0bed087d EB |
1337 | ret = -ENOTSUP; |
1338 | goto exit; | |
7fa60fa3 | 1339 | } |
f4c129a3 | 1340 | s->create_type = g_strdup(ct); |
7fa60fa3 | 1341 | s->desc_offset = 0; |
cdc0dd25 | 1342 | ret = vmdk_parse_extents(buf, bs, options, errp); |
0bed087d | 1343 | exit: |
0bed087d | 1344 | return ret; |
7fa60fa3 FZ |
1345 | } |
1346 | ||
015a1036 HR |
1347 | static int vmdk_open(BlockDriverState *bs, QDict *options, int flags, |
1348 | Error **errp) | |
b4b3ab14 | 1349 | { |
9aeecbbc | 1350 | char *buf; |
86c6b429 FZ |
1351 | int ret; |
1352 | BDRVVmdkState *s = bs->opaque; | |
37f09e5e | 1353 | uint32_t magic; |
b4b3ab14 | 1354 | |
3804e3cf KW |
1355 | GRAPH_RDLOCK_GUARD_MAINLOOP(); |
1356 | ||
83930780 VSO |
1357 | ret = bdrv_open_file_child(NULL, options, "file", bs, errp); |
1358 | if (ret < 0) { | |
1359 | return ret; | |
4e4bf5c4 KW |
1360 | } |
1361 | ||
cf2ab8fc | 1362 | buf = vmdk_read_desc(bs->file, 0, errp); |
d1833ef5 PB |
1363 | if (!buf) { |
1364 | return -EINVAL; | |
1365 | } | |
1366 | ||
37f09e5e PB |
1367 | magic = ldl_be_p(buf); |
1368 | switch (magic) { | |
1369 | case VMDK3_MAGIC: | |
1370 | case VMDK4_MAGIC: | |
9a4f4c31 | 1371 | ret = vmdk_open_sparse(bs, bs->file, flags, buf, options, |
24bc15d1 | 1372 | errp); |
37f09e5e PB |
1373 | s->desc_offset = 0x200; |
1374 | break; | |
1375 | default: | |
8b1869da HR |
1376 | /* No data in the descriptor file */ |
1377 | bs->file->role &= ~BDRV_CHILD_DATA; | |
1378 | ||
1379 | /* Must succeed because we have given up permissions if anything */ | |
1380 | bdrv_child_refresh_perms(bs, bs->file, &error_abort); | |
1381 | ||
a6468367 | 1382 | ret = vmdk_open_desc_file(bs, flags, buf, options, errp); |
37f09e5e | 1383 | break; |
b4b3ab14 | 1384 | } |
37f09e5e PB |
1385 | if (ret) { |
1386 | goto fail; | |
1387 | } | |
1388 | ||
bae0a0cc PB |
1389 | /* try to open parent images, if exist */ |
1390 | ret = vmdk_parent_open(bs); | |
1391 | if (ret) { | |
1392 | goto fail; | |
1393 | } | |
9877860e PM |
1394 | ret = vmdk_read_cid(bs, 0, &s->cid); |
1395 | if (ret) { | |
1396 | goto fail; | |
1397 | } | |
1398 | ret = vmdk_read_cid(bs, 1, &s->parent_cid); | |
1399 | if (ret) { | |
1400 | goto fail; | |
1401 | } | |
848c66e8 | 1402 | qemu_co_mutex_init(&s->lock); |
2bc3166c KW |
1403 | |
1404 | /* Disable migration when VMDK images are used */ | |
81e5f78a AG |
1405 | error_setg(&s->migration_blocker, "The vmdk format used by node '%s' " |
1406 | "does not support live migration", | |
1407 | bdrv_get_device_or_node_name(bs)); | |
e0ee3a8f | 1408 | ret = migrate_add_blocker_normal(&s->migration_blocker, errp); |
386f6c07 | 1409 | if (ret < 0) { |
fe44dc91 AA |
1410 | goto fail; |
1411 | } | |
1412 | ||
d1833ef5 | 1413 | g_free(buf); |
2bc3166c | 1414 | return 0; |
bae0a0cc PB |
1415 | |
1416 | fail: | |
d1833ef5 | 1417 | g_free(buf); |
f4c129a3 FZ |
1418 | g_free(s->create_type); |
1419 | s->create_type = NULL; | |
bae0a0cc PB |
1420 | vmdk_free_extents(bs); |
1421 | return ret; | |
ea2384d3 FB |
1422 | } |
1423 | ||
d34682cd | 1424 | |
3baca891 | 1425 | static void vmdk_refresh_limits(BlockDriverState *bs, Error **errp) |
d34682cd KW |
1426 | { |
1427 | BDRVVmdkState *s = bs->opaque; | |
1428 | int i; | |
1429 | ||
1430 | for (i = 0; i < s->num_extents; i++) { | |
1431 | if (!s->extents[i].flat) { | |
cf081fca EB |
1432 | bs->bl.pwrite_zeroes_alignment = |
1433 | MAX(bs->bl.pwrite_zeroes_alignment, | |
1434 | s->extents[i].cluster_sectors << BDRV_SECTOR_BITS); | |
d34682cd KW |
1435 | } |
1436 | } | |
d34682cd KW |
1437 | } |
1438 | ||
c6ac36e1 FZ |
1439 | /** |
1440 | * get_whole_cluster | |
1441 | * | |
1442 | * Copy backing file's cluster that covers @sector_num, otherwise write zero, | |
4823cde5 KW |
1443 | * to the cluster at @cluster_sector_num. If @zeroed is true, we're overwriting |
1444 | * a zeroed cluster in the current layer and must not copy data from the | |
1445 | * backing file. | |
c6ac36e1 FZ |
1446 | * |
1447 | * If @skip_start_sector < @skip_end_sector, the relative range | |
1448 | * [@skip_start_sector, @skip_end_sector) is not copied or written, and leave | |
1449 | * it for call to write user data in the request. | |
1450 | */ | |
b9b10c35 KW |
1451 | static int coroutine_fn GRAPH_RDLOCK |
1452 | get_whole_cluster(BlockDriverState *bs, VmdkExtent *extent, | |
1453 | uint64_t cluster_offset, uint64_t offset, | |
1454 | uint64_t skip_start_bytes, uint64_t skip_end_bytes, | |
1455 | bool zeroed) | |
5f4da8c0 | 1456 | { |
bf81507d | 1457 | int ret = VMDK_OK; |
c6ac36e1 FZ |
1458 | int64_t cluster_bytes; |
1459 | uint8_t *whole_grain; | |
4823cde5 | 1460 | bool copy_from_backing; |
c6ac36e1 FZ |
1461 | |
1462 | /* For COW, align request sector_num to cluster start */ | |
c6ac36e1 | 1463 | cluster_bytes = extent->cluster_sectors << BDRV_SECTOR_BITS; |
37b1d7d8 | 1464 | offset = QEMU_ALIGN_DOWN(offset, cluster_bytes); |
c6ac36e1 | 1465 | whole_grain = qemu_blockalign(bs, cluster_bytes); |
4823cde5 | 1466 | copy_from_backing = bs->backing && !zeroed; |
5f4da8c0 | 1467 | |
4823cde5 | 1468 | if (!copy_from_backing) { |
37b1d7d8 KW |
1469 | memset(whole_grain, 0, skip_start_bytes); |
1470 | memset(whole_grain + skip_end_bytes, 0, cluster_bytes - skip_end_bytes); | |
c6ac36e1 FZ |
1471 | } |
1472 | ||
37b1d7d8 | 1473 | assert(skip_end_bytes <= cluster_bytes); |
0e69c543 FZ |
1474 | /* we will be here if it's first write on non-exist grain(cluster). |
1475 | * try to read from parent image, if exist */ | |
760e0063 | 1476 | if (bs->backing && !vmdk_is_cid_valid(bs)) { |
c6ac36e1 FZ |
1477 | ret = VMDK_ERROR; |
1478 | goto exit; | |
1479 | } | |
5f4da8c0 | 1480 | |
c6ac36e1 | 1481 | /* Read backing data before skip range */ |
37b1d7d8 | 1482 | if (skip_start_bytes > 0) { |
4823cde5 | 1483 | if (copy_from_backing) { |
23c4b2a8 | 1484 | /* qcow2 emits this on bs->file instead of bs->backing */ |
17362398 | 1485 | BLKDBG_CO_EVENT(extent->file, BLKDBG_COW_READ); |
a5c4e5be AF |
1486 | ret = bdrv_co_pread(bs->backing, offset, skip_start_bytes, |
1487 | whole_grain, 0); | |
c6ac36e1 FZ |
1488 | if (ret < 0) { |
1489 | ret = VMDK_ERROR; | |
1490 | goto exit; | |
1491 | } | |
1492 | } | |
17362398 | 1493 | BLKDBG_CO_EVENT(extent->file, BLKDBG_COW_WRITE); |
a5c4e5be AF |
1494 | ret = bdrv_co_pwrite(extent->file, cluster_offset, skip_start_bytes, |
1495 | whole_grain, 0); | |
c336500d | 1496 | if (ret < 0) { |
bf81507d FZ |
1497 | ret = VMDK_ERROR; |
1498 | goto exit; | |
c336500d | 1499 | } |
c6ac36e1 FZ |
1500 | } |
1501 | /* Read backing data after skip range */ | |
37b1d7d8 | 1502 | if (skip_end_bytes < cluster_bytes) { |
4823cde5 | 1503 | if (copy_from_backing) { |
23c4b2a8 | 1504 | /* qcow2 emits this on bs->file instead of bs->backing */ |
17362398 | 1505 | BLKDBG_CO_EVENT(extent->file, BLKDBG_COW_READ); |
a5c4e5be AF |
1506 | ret = bdrv_co_pread(bs->backing, offset + skip_end_bytes, |
1507 | cluster_bytes - skip_end_bytes, | |
1508 | whole_grain + skip_end_bytes, 0); | |
c6ac36e1 FZ |
1509 | if (ret < 0) { |
1510 | ret = VMDK_ERROR; | |
1511 | goto exit; | |
1512 | } | |
1513 | } | |
17362398 | 1514 | BLKDBG_CO_EVENT(extent->file, BLKDBG_COW_WRITE); |
a5c4e5be AF |
1515 | ret = bdrv_co_pwrite(extent->file, cluster_offset + skip_end_bytes, |
1516 | cluster_bytes - skip_end_bytes, | |
1517 | whole_grain + skip_end_bytes, 0); | |
c336500d | 1518 | if (ret < 0) { |
bf81507d FZ |
1519 | ret = VMDK_ERROR; |
1520 | goto exit; | |
630530a6 TS |
1521 | } |
1522 | } | |
c6ac36e1 | 1523 | |
37b1d7d8 | 1524 | ret = VMDK_OK; |
bf81507d FZ |
1525 | exit: |
1526 | qemu_vfree(whole_grain); | |
1527 | return ret; | |
630530a6 TS |
1528 | } |
1529 | ||
88095349 EGE |
1530 | static int coroutine_fn GRAPH_RDLOCK |
1531 | vmdk_L2update(VmdkExtent *extent, VmdkMetaData *m_data, uint32_t offset) | |
630530a6 | 1532 | { |
c6ac36e1 | 1533 | offset = cpu_to_le32(offset); |
630530a6 | 1534 | /* update L2 table */ |
17362398 | 1535 | BLKDBG_CO_EVENT(extent->file, BLKDBG_L2_UPDATE); |
a5c4e5be AF |
1536 | if (bdrv_co_pwrite(extent->file, |
1537 | ((int64_t)m_data->l2_offset * 512) | |
1538 | + (m_data->l2_index * sizeof(offset)), | |
1539 | sizeof(offset), &offset, 0) < 0) { | |
65f74725 | 1540 | return VMDK_ERROR; |
b3976d3c | 1541 | } |
630530a6 | 1542 | /* update backup L2 table */ |
b3976d3c FZ |
1543 | if (extent->l1_backup_table_offset != 0) { |
1544 | m_data->l2_offset = extent->l1_backup_table[m_data->l1_index]; | |
a5c4e5be AF |
1545 | if (bdrv_co_pwrite(extent->file, |
1546 | ((int64_t)m_data->l2_offset * 512) | |
1547 | + (m_data->l2_index * sizeof(offset)), | |
1548 | sizeof(offset), &offset, 0) < 0) { | |
65f74725 | 1549 | return VMDK_ERROR; |
b3976d3c | 1550 | } |
5f4da8c0 | 1551 | } |
a5c4e5be | 1552 | if (bdrv_co_flush(extent->file->bs) < 0) { |
2758be05 KW |
1553 | return VMDK_ERROR; |
1554 | } | |
cdeaf1f1 FZ |
1555 | if (m_data->l2_cache_entry) { |
1556 | *m_data->l2_cache_entry = offset; | |
1557 | } | |
630530a6 | 1558 | |
65f74725 | 1559 | return VMDK_OK; |
5f4da8c0 TS |
1560 | } |
1561 | ||
c6ac36e1 FZ |
1562 | /** |
1563 | * get_cluster_offset | |
1564 | * | |
1565 | * Look up cluster offset in extent file by sector number, and store in | |
1566 | * @cluster_offset. | |
1567 | * | |
1568 | * For flat extents, the start offset as parsed from the description file is | |
1569 | * returned. | |
1570 | * | |
1571 | * For sparse extents, look up in L1, L2 table. If allocate is true, return an | |
1572 | * offset for a new cluster and update L2 cache. If there is a backing file, | |
1573 | * COW is done before returning; otherwise, zeroes are written to the allocated | |
1574 | * cluster. Both COW and zero writing skips the sector range | |
1575 | * [@skip_start_sector, @skip_end_sector) passed in by caller, because caller | |
1576 | * has new data to write there. | |
1577 | * | |
1578 | * Returns: VMDK_OK if cluster exists and mapped in the image. | |
1579 | * VMDK_UNALLOC if cluster is not mapped and @allocate is false. | |
1580 | * VMDK_ERROR if failed. | |
1581 | */ | |
b9b10c35 KW |
1582 | static int coroutine_fn GRAPH_RDLOCK |
1583 | get_cluster_offset(BlockDriverState *bs, VmdkExtent *extent, | |
1584 | VmdkMetaData *m_data, uint64_t offset, bool allocate, | |
1585 | uint64_t *cluster_offset, uint64_t skip_start_bytes, | |
1586 | uint64_t skip_end_bytes) | |
ea2384d3 | 1587 | { |
ea2384d3 FB |
1588 | unsigned int l1_index, l2_offset, l2_index; |
1589 | int min_index, i, j; | |
98eb9733 SE |
1590 | uint32_t min_count; |
1591 | void *l2_table; | |
14ead646 | 1592 | bool zeroed = false; |
c6ac36e1 | 1593 | int64_t ret; |
d1319b07 | 1594 | int64_t cluster_sector; |
98eb9733 | 1595 | unsigned int l2_size_bytes = extent->l2_size * extent->entry_size; |
630530a6 | 1596 | |
ae261c86 | 1597 | if (m_data) { |
4dc20e64 | 1598 | m_data->new_allocation = false; |
ae261c86 | 1599 | } |
91b85bd3 | 1600 | if (extent->flat) { |
7fa60fa3 | 1601 | *cluster_offset = extent->flat_start_offset; |
65f74725 | 1602 | return VMDK_OK; |
91b85bd3 | 1603 | } |
630530a6 | 1604 | |
6398de51 | 1605 | offset -= (extent->end_sector - extent->sectors) * SECTOR_SIZE; |
b3976d3c FZ |
1606 | l1_index = (offset >> 9) / extent->l1_entry_sectors; |
1607 | if (l1_index >= extent->l1_size) { | |
65f74725 | 1608 | return VMDK_ERROR; |
b3976d3c | 1609 | } |
98eb9733 SE |
1610 | if (extent->sesparse) { |
1611 | uint64_t l2_offset_u64; | |
1612 | ||
1613 | assert(extent->entry_size == sizeof(uint64_t)); | |
1614 | ||
1615 | l2_offset_u64 = ((uint64_t *)extent->l1_table)[l1_index]; | |
1616 | if (l2_offset_u64 == 0) { | |
1617 | l2_offset = 0; | |
1618 | } else if ((l2_offset_u64 & 0xffffffff00000000) != 0x1000000000000000) { | |
1619 | /* | |
1620 | * Top most nibble is 0x1 if grain table is allocated. | |
1621 | * strict check - top most 4 bytes must be 0x10000000 since max | |
1622 | * supported size is 64TB for disk - so no more than 64TB / 16MB | |
1623 | * grain directories which is smaller than uint32, | |
1624 | * where 16MB is the only supported default grain table coverage. | |
1625 | */ | |
1626 | return VMDK_ERROR; | |
1627 | } else { | |
1628 | l2_offset_u64 = l2_offset_u64 & 0x00000000ffffffff; | |
1629 | l2_offset_u64 = extent->sesparse_l2_tables_offset + | |
1630 | l2_offset_u64 * l2_size_bytes / SECTOR_SIZE; | |
1631 | if (l2_offset_u64 > 0x00000000ffffffff) { | |
1632 | return VMDK_ERROR; | |
1633 | } | |
1634 | l2_offset = (unsigned int)(l2_offset_u64); | |
1635 | } | |
1636 | } else { | |
1637 | assert(extent->entry_size == sizeof(uint32_t)); | |
1638 | l2_offset = ((uint32_t *)extent->l1_table)[l1_index]; | |
1639 | } | |
b3976d3c | 1640 | if (!l2_offset) { |
65f74725 | 1641 | return VMDK_UNALLOC; |
b3976d3c | 1642 | } |
b4b3ab14 | 1643 | for (i = 0; i < L2_CACHE_SIZE; i++) { |
b3976d3c | 1644 | if (l2_offset == extent->l2_cache_offsets[i]) { |
ea2384d3 | 1645 | /* increment the hit count */ |
b3976d3c | 1646 | if (++extent->l2_cache_counts[i] == 0xffffffff) { |
b4b3ab14 | 1647 | for (j = 0; j < L2_CACHE_SIZE; j++) { |
b3976d3c | 1648 | extent->l2_cache_counts[j] >>= 1; |
ea2384d3 FB |
1649 | } |
1650 | } | |
98eb9733 | 1651 | l2_table = (char *)extent->l2_cache + (i * l2_size_bytes); |
ea2384d3 FB |
1652 | goto found; |
1653 | } | |
1654 | } | |
1655 | /* not found: load a new entry in the least used one */ | |
1656 | min_index = 0; | |
1657 | min_count = 0xffffffff; | |
b4b3ab14 | 1658 | for (i = 0; i < L2_CACHE_SIZE; i++) { |
b3976d3c FZ |
1659 | if (extent->l2_cache_counts[i] < min_count) { |
1660 | min_count = extent->l2_cache_counts[i]; | |
ea2384d3 FB |
1661 | min_index = i; |
1662 | } | |
1663 | } | |
98eb9733 | 1664 | l2_table = (char *)extent->l2_cache + (min_index * l2_size_bytes); |
17362398 | 1665 | BLKDBG_CO_EVENT(extent->file, BLKDBG_L2_LOAD); |
a5c4e5be | 1666 | if (bdrv_co_pread(extent->file, |
b3976d3c | 1667 | (int64_t)l2_offset * 512, |
53fb7844 | 1668 | l2_size_bytes, |
a5c4e5be | 1669 | l2_table, 0 |
353a5d84 | 1670 | ) < 0) { |
65f74725 | 1671 | return VMDK_ERROR; |
b3976d3c | 1672 | } |
5f4da8c0 | 1673 | |
b3976d3c FZ |
1674 | extent->l2_cache_offsets[min_index] = l2_offset; |
1675 | extent->l2_cache_counts[min_index] = 1; | |
ea2384d3 | 1676 | found: |
b3976d3c | 1677 | l2_index = ((offset >> 9) / extent->cluster_sectors) % extent->l2_size; |
2821c1cc KW |
1678 | if (m_data) { |
1679 | m_data->l1_index = l1_index; | |
1680 | m_data->l2_index = l2_index; | |
1681 | m_data->l2_offset = l2_offset; | |
1682 | m_data->l2_cache_entry = ((uint32_t *)l2_table) + l2_index; | |
1683 | } | |
630530a6 | 1684 | |
98eb9733 SE |
1685 | if (extent->sesparse) { |
1686 | cluster_sector = le64_to_cpu(((uint64_t *)l2_table)[l2_index]); | |
1687 | switch (cluster_sector & 0xf000000000000000) { | |
1688 | case 0x0000000000000000: | |
1689 | /* unallocated grain */ | |
1690 | if (cluster_sector != 0) { | |
1691 | return VMDK_ERROR; | |
1692 | } | |
1693 | break; | |
1694 | case 0x1000000000000000: | |
1695 | /* scsi-unmapped grain - fallthrough */ | |
1696 | case 0x2000000000000000: | |
1697 | /* zero grain */ | |
1698 | zeroed = true; | |
1699 | break; | |
1700 | case 0x3000000000000000: | |
1701 | /* allocated grain */ | |
1702 | cluster_sector = (((cluster_sector & 0x0fff000000000000) >> 48) | | |
1703 | ((cluster_sector & 0x0000ffffffffffff) << 12)); | |
1704 | cluster_sector = extent->sesparse_clusters_offset + | |
1705 | cluster_sector * extent->cluster_sectors; | |
1706 | break; | |
1707 | default: | |
1708 | return VMDK_ERROR; | |
1709 | } | |
1710 | } else { | |
1711 | cluster_sector = le32_to_cpu(((uint32_t *)l2_table)[l2_index]); | |
1712 | ||
1713 | if (extent->has_zero_grain && cluster_sector == VMDK_GTE_ZEROED) { | |
1714 | zeroed = true; | |
1715 | } | |
14ead646 FZ |
1716 | } |
1717 | ||
c6ac36e1 | 1718 | if (!cluster_sector || zeroed) { |
91b85bd3 | 1719 | if (!allocate) { |
14ead646 | 1720 | return zeroed ? VMDK_ZEROED : VMDK_UNALLOC; |
91b85bd3 | 1721 | } |
98eb9733 | 1722 | assert(!extent->sesparse); |
9949f97e | 1723 | |
a77672ea YCL |
1724 | if (extent->next_cluster_sector >= VMDK_EXTENT_MAX_SECTORS) { |
1725 | return VMDK_ERROR; | |
1726 | } | |
1727 | ||
c6ac36e1 FZ |
1728 | cluster_sector = extent->next_cluster_sector; |
1729 | extent->next_cluster_sector += extent->cluster_sectors; | |
630530a6 | 1730 | |
630530a6 TS |
1731 | /* First of all we write grain itself, to avoid race condition |
1732 | * that may to corrupt the image. | |
1733 | * This problem may occur because of insufficient space on host disk | |
1734 | * or inappropriate VM shutdown. | |
1735 | */ | |
37b1d7d8 | 1736 | ret = get_whole_cluster(bs, extent, cluster_sector * BDRV_SECTOR_SIZE, |
4823cde5 KW |
1737 | offset, skip_start_bytes, skip_end_bytes, |
1738 | zeroed); | |
c6ac36e1 FZ |
1739 | if (ret) { |
1740 | return ret; | |
630530a6 | 1741 | } |
524089bc | 1742 | if (m_data) { |
4dc20e64 | 1743 | m_data->new_allocation = true; |
524089bc | 1744 | } |
ff1afc72 | 1745 | } |
c6ac36e1 | 1746 | *cluster_offset = cluster_sector << BDRV_SECTOR_BITS; |
65f74725 | 1747 | return VMDK_OK; |
ea2384d3 FB |
1748 | } |
1749 | ||
b3976d3c FZ |
1750 | static VmdkExtent *find_extent(BDRVVmdkState *s, |
1751 | int64_t sector_num, VmdkExtent *start_hint) | |
1752 | { | |
1753 | VmdkExtent *extent = start_hint; | |
1754 | ||
1755 | if (!extent) { | |
1756 | extent = &s->extents[0]; | |
1757 | } | |
1758 | while (extent < &s->extents[s->num_extents]) { | |
1759 | if (sector_num < extent->end_sector) { | |
1760 | return extent; | |
1761 | } | |
1762 | extent++; | |
1763 | } | |
1764 | return NULL; | |
1765 | } | |
1766 | ||
a844a2b0 KW |
1767 | static inline uint64_t vmdk_find_offset_in_cluster(VmdkExtent *extent, |
1768 | int64_t offset) | |
1769 | { | |
9be38598 | 1770 | uint64_t extent_begin_offset, extent_relative_offset; |
a844a2b0 KW |
1771 | uint64_t cluster_size = extent->cluster_sectors * BDRV_SECTOR_SIZE; |
1772 | ||
1773 | extent_begin_offset = | |
1774 | (extent->end_sector - extent->sectors) * BDRV_SECTOR_SIZE; | |
1775 | extent_relative_offset = offset - extent_begin_offset; | |
9be38598 | 1776 | return extent_relative_offset % cluster_size; |
a844a2b0 KW |
1777 | } |
1778 | ||
b9b10c35 KW |
1779 | static int coroutine_fn GRAPH_RDLOCK |
1780 | vmdk_co_block_status(BlockDriverState *bs, bool want_zero, | |
1781 | int64_t offset, int64_t bytes, int64_t *pnum, | |
1782 | int64_t *map, BlockDriverState **file) | |
ea2384d3 FB |
1783 | { |
1784 | BDRVVmdkState *s = bs->opaque; | |
b3976d3c | 1785 | int64_t index_in_cluster, n, ret; |
c72080b9 | 1786 | uint64_t cluster_offset; |
b3976d3c FZ |
1787 | VmdkExtent *extent; |
1788 | ||
c72080b9 | 1789 | extent = find_extent(s, offset >> BDRV_SECTOR_BITS, NULL); |
b3976d3c | 1790 | if (!extent) { |
c72080b9 | 1791 | return -EIO; |
b3976d3c | 1792 | } |
f8a2e5e3 | 1793 | qemu_co_mutex_lock(&s->lock); |
c72080b9 | 1794 | ret = get_cluster_offset(bs, extent, NULL, offset, false, &cluster_offset, |
c6ac36e1 | 1795 | 0, 0); |
f8a2e5e3 | 1796 | qemu_co_mutex_unlock(&s->lock); |
14ead646 | 1797 | |
c72080b9 | 1798 | index_in_cluster = vmdk_find_offset_in_cluster(extent, offset); |
4bc74be9 PB |
1799 | switch (ret) { |
1800 | case VMDK_ERROR: | |
1801 | ret = -EIO; | |
1802 | break; | |
1803 | case VMDK_UNALLOC: | |
1804 | ret = 0; | |
1805 | break; | |
1806 | case VMDK_ZEROED: | |
1807 | ret = BDRV_BLOCK_ZERO; | |
1808 | break; | |
1809 | case VMDK_OK: | |
1810 | ret = BDRV_BLOCK_DATA; | |
e0f100f5 | 1811 | if (!extent->compressed) { |
d0a18f10 | 1812 | ret |= BDRV_BLOCK_OFFSET_VALID; |
c72080b9 | 1813 | *map = cluster_offset + index_in_cluster; |
4dd84ac9 HR |
1814 | if (extent->flat) { |
1815 | ret |= BDRV_BLOCK_RECURSE; | |
1816 | } | |
28482891 AD |
1817 | } else { |
1818 | ret |= BDRV_BLOCK_COMPRESSED; | |
4bc74be9 | 1819 | } |
e0f100f5 | 1820 | *file = extent->file->bs; |
4bc74be9 PB |
1821 | break; |
1822 | } | |
91b85bd3 | 1823 | |
c72080b9 EB |
1824 | n = extent->cluster_sectors * BDRV_SECTOR_SIZE - index_in_cluster; |
1825 | *pnum = MIN(n, bytes); | |
b3976d3c | 1826 | return ret; |
ea2384d3 FB |
1827 | } |
1828 | ||
b9b10c35 | 1829 | static int coroutine_fn GRAPH_RDLOCK |
b4df9903 PB |
1830 | vmdk_write_extent(VmdkExtent *extent, int64_t cluster_offset, |
1831 | int64_t offset_in_cluster, QEMUIOVector *qiov, | |
1832 | uint64_t qiov_offset, uint64_t n_bytes, | |
1833 | uint64_t offset) | |
dd3f6ee2 FZ |
1834 | { |
1835 | int ret; | |
2b2c8c5d FZ |
1836 | VmdkGrainMarker *data = NULL; |
1837 | uLongf buf_len; | |
37b1d7d8 | 1838 | QEMUIOVector local_qiov; |
5e82a31e FZ |
1839 | int64_t write_offset; |
1840 | int64_t write_end_sector; | |
dd3f6ee2 | 1841 | |
2b2c8c5d | 1842 | if (extent->compressed) { |
37b1d7d8 KW |
1843 | void *compressed_data; |
1844 | ||
bedb8bb4 HR |
1845 | /* Only whole clusters */ |
1846 | if (offset_in_cluster || | |
1847 | n_bytes > (extent->cluster_sectors * SECTOR_SIZE) || | |
1848 | (n_bytes < (extent->cluster_sectors * SECTOR_SIZE) && | |
1849 | offset + n_bytes != extent->end_sector * SECTOR_SIZE)) | |
1850 | { | |
1851 | ret = -EINVAL; | |
1852 | goto out; | |
1853 | } | |
1854 | ||
2b2c8c5d FZ |
1855 | if (!extent->has_marker) { |
1856 | ret = -EINVAL; | |
1857 | goto out; | |
1858 | } | |
1859 | buf_len = (extent->cluster_sectors << 9) * 2; | |
1860 | data = g_malloc(buf_len + sizeof(VmdkGrainMarker)); | |
37b1d7d8 KW |
1861 | |
1862 | compressed_data = g_malloc(n_bytes); | |
1863 | qemu_iovec_to_buf(qiov, qiov_offset, compressed_data, n_bytes); | |
1864 | ret = compress(data->data, &buf_len, compressed_data, n_bytes); | |
1865 | g_free(compressed_data); | |
1866 | ||
1867 | if (ret != Z_OK || buf_len == 0) { | |
2b2c8c5d FZ |
1868 | ret = -EINVAL; |
1869 | goto out; | |
1870 | } | |
37b1d7d8 | 1871 | |
4545d4f4 QH |
1872 | data->lba = cpu_to_le64(offset >> BDRV_SECTOR_BITS); |
1873 | data->size = cpu_to_le32(buf_len); | |
37b1d7d8 KW |
1874 | |
1875 | n_bytes = buf_len + sizeof(VmdkGrainMarker); | |
199d95b0 | 1876 | qemu_iovec_init_buf(&local_qiov, data, n_bytes); |
23c4b2a8 | 1877 | |
17362398 | 1878 | BLKDBG_CO_EVENT(extent->file, BLKDBG_WRITE_COMPRESSED); |
37b1d7d8 KW |
1879 | } else { |
1880 | qemu_iovec_init(&local_qiov, qiov->niov); | |
1881 | qemu_iovec_concat(&local_qiov, qiov, qiov_offset, n_bytes); | |
23c4b2a8 | 1882 | |
17362398 | 1883 | BLKDBG_CO_EVENT(extent->file, BLKDBG_WRITE_AIO); |
2b2c8c5d | 1884 | } |
37b1d7d8 | 1885 | |
3c363575 | 1886 | write_offset = cluster_offset + offset_in_cluster; |
a03ef88f | 1887 | ret = bdrv_co_pwritev(extent->file, write_offset, n_bytes, |
37b1d7d8 | 1888 | &local_qiov, 0); |
5e82a31e | 1889 | |
37b1d7d8 | 1890 | write_end_sector = DIV_ROUND_UP(write_offset + n_bytes, BDRV_SECTOR_SIZE); |
5e82a31e | 1891 | |
3efffc32 RG |
1892 | if (extent->compressed) { |
1893 | extent->next_cluster_sector = write_end_sector; | |
1894 | } else { | |
1895 | extent->next_cluster_sector = MAX(extent->next_cluster_sector, | |
1896 | write_end_sector); | |
1897 | } | |
5e82a31e | 1898 | |
37b1d7d8 | 1899 | if (ret < 0) { |
dd3f6ee2 FZ |
1900 | goto out; |
1901 | } | |
1902 | ret = 0; | |
1903 | out: | |
2b2c8c5d | 1904 | g_free(data); |
37b1d7d8 KW |
1905 | if (!extent->compressed) { |
1906 | qemu_iovec_destroy(&local_qiov); | |
1907 | } | |
dd3f6ee2 FZ |
1908 | return ret; |
1909 | } | |
1910 | ||
b9b10c35 | 1911 | static int coroutine_fn GRAPH_RDLOCK |
b4df9903 | 1912 | vmdk_read_extent(VmdkExtent *extent, int64_t cluster_offset, |
b9b10c35 | 1913 | int64_t offset_in_cluster, QEMUIOVector *qiov, int bytes) |
dd3f6ee2 FZ |
1914 | { |
1915 | int ret; | |
2b2c8c5d FZ |
1916 | int cluster_bytes, buf_bytes; |
1917 | uint8_t *cluster_buf, *compressed_data; | |
1918 | uint8_t *uncomp_buf; | |
1919 | uint32_t data_len; | |
1920 | VmdkGrainMarker *marker; | |
1921 | uLongf buf_len; | |
1922 | ||
dd3f6ee2 | 1923 | |
2b2c8c5d | 1924 | if (!extent->compressed) { |
17362398 | 1925 | BLKDBG_CO_EVENT(extent->file, BLKDBG_READ_AIO); |
a03ef88f | 1926 | ret = bdrv_co_preadv(extent->file, |
f10cc243 KW |
1927 | cluster_offset + offset_in_cluster, bytes, |
1928 | qiov, 0); | |
1929 | if (ret < 0) { | |
1930 | return ret; | |
2b2c8c5d | 1931 | } |
f10cc243 | 1932 | return 0; |
2b2c8c5d FZ |
1933 | } |
1934 | cluster_bytes = extent->cluster_sectors * 512; | |
1935 | /* Read two clusters in case GrainMarker + compressed data > one cluster */ | |
1936 | buf_bytes = cluster_bytes * 2; | |
1937 | cluster_buf = g_malloc(buf_bytes); | |
1938 | uncomp_buf = g_malloc(cluster_bytes); | |
17362398 | 1939 | BLKDBG_CO_EVENT(extent->file, BLKDBG_READ_COMPRESSED); |
a5c4e5be AF |
1940 | ret = bdrv_co_pread(extent->file, cluster_offset, buf_bytes, cluster_buf, |
1941 | 0); | |
2b2c8c5d FZ |
1942 | if (ret < 0) { |
1943 | goto out; | |
1944 | } | |
1945 | compressed_data = cluster_buf; | |
1946 | buf_len = cluster_bytes; | |
1947 | data_len = cluster_bytes; | |
1948 | if (extent->has_marker) { | |
1949 | marker = (VmdkGrainMarker *)cluster_buf; | |
1950 | compressed_data = marker->data; | |
1951 | data_len = le32_to_cpu(marker->size); | |
1952 | } | |
1953 | if (!data_len || data_len > buf_bytes) { | |
1954 | ret = -EINVAL; | |
1955 | goto out; | |
1956 | } | |
1957 | ret = uncompress(uncomp_buf, &buf_len, compressed_data, data_len); | |
1958 | if (ret != Z_OK) { | |
1959 | ret = -EINVAL; | |
1960 | goto out; | |
1961 | ||
1962 | } | |
1963 | if (offset_in_cluster < 0 || | |
f10cc243 | 1964 | offset_in_cluster + bytes > buf_len) { |
2b2c8c5d FZ |
1965 | ret = -EINVAL; |
1966 | goto out; | |
dd3f6ee2 | 1967 | } |
f10cc243 | 1968 | qemu_iovec_from_buf(qiov, 0, uncomp_buf + offset_in_cluster, bytes); |
2b2c8c5d FZ |
1969 | ret = 0; |
1970 | ||
1971 | out: | |
1972 | g_free(uncomp_buf); | |
1973 | g_free(cluster_buf); | |
1974 | return ret; | |
dd3f6ee2 FZ |
1975 | } |
1976 | ||
b9b10c35 | 1977 | static int coroutine_fn GRAPH_RDLOCK |
f7ef38dd VSO |
1978 | vmdk_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes, |
1979 | QEMUIOVector *qiov, BdrvRequestFlags flags) | |
ea2384d3 FB |
1980 | { |
1981 | BDRVVmdkState *s = bs->opaque; | |
b3976d3c | 1982 | int ret; |
f10cc243 | 1983 | uint64_t n_bytes, offset_in_cluster; |
b3976d3c | 1984 | VmdkExtent *extent = NULL; |
f10cc243 | 1985 | QEMUIOVector local_qiov; |
ea2384d3 | 1986 | uint64_t cluster_offset; |
f10cc243 | 1987 | uint64_t bytes_done = 0; |
5f4da8c0 | 1988 | |
f10cc243 KW |
1989 | qemu_iovec_init(&local_qiov, qiov->niov); |
1990 | qemu_co_mutex_lock(&s->lock); | |
1991 | ||
1992 | while (bytes > 0) { | |
1993 | extent = find_extent(s, offset >> BDRV_SECTOR_BITS, extent); | |
b3976d3c | 1994 | if (!extent) { |
f10cc243 KW |
1995 | ret = -EIO; |
1996 | goto fail; | |
b3976d3c | 1997 | } |
c6ac36e1 | 1998 | ret = get_cluster_offset(bs, extent, NULL, |
f10cc243 KW |
1999 | offset, false, &cluster_offset, 0, 0); |
2000 | offset_in_cluster = vmdk_find_offset_in_cluster(extent, offset); | |
2001 | ||
2002 | n_bytes = MIN(bytes, extent->cluster_sectors * BDRV_SECTOR_SIZE | |
2003 | - offset_in_cluster); | |
2004 | ||
14ead646 | 2005 | if (ret != VMDK_OK) { |
91b85bd3 | 2006 | /* if not allocated, try to read from parent image, if exist */ |
760e0063 | 2007 | if (bs->backing && ret != VMDK_ZEROED) { |
ae261c86 | 2008 | if (!vmdk_is_cid_valid(bs)) { |
f10cc243 KW |
2009 | ret = -EINVAL; |
2010 | goto fail; | |
ae261c86 | 2011 | } |
f10cc243 KW |
2012 | |
2013 | qemu_iovec_reset(&local_qiov); | |
2014 | qemu_iovec_concat(&local_qiov, qiov, bytes_done, n_bytes); | |
2015 | ||
23c4b2a8 | 2016 | /* qcow2 emits this on bs->file instead of bs->backing */ |
17362398 | 2017 | BLKDBG_CO_EVENT(bs->file, BLKDBG_READ_BACKING_AIO); |
a03ef88f | 2018 | ret = bdrv_co_preadv(bs->backing, offset, n_bytes, |
f10cc243 | 2019 | &local_qiov, 0); |
ae261c86 | 2020 | if (ret < 0) { |
f10cc243 | 2021 | goto fail; |
ae261c86 | 2022 | } |
5f4da8c0 | 2023 | } else { |
f10cc243 | 2024 | qemu_iovec_memset(qiov, bytes_done, 0, n_bytes); |
5f4da8c0 | 2025 | } |
ea2384d3 | 2026 | } else { |
f10cc243 KW |
2027 | qemu_iovec_reset(&local_qiov); |
2028 | qemu_iovec_concat(&local_qiov, qiov, bytes_done, n_bytes); | |
2029 | ||
2030 | ret = vmdk_read_extent(extent, cluster_offset, offset_in_cluster, | |
2031 | &local_qiov, n_bytes); | |
dd3f6ee2 | 2032 | if (ret) { |
f10cc243 | 2033 | goto fail; |
7fa60fa3 | 2034 | } |
ea2384d3 | 2035 | } |
f10cc243 KW |
2036 | bytes -= n_bytes; |
2037 | offset += n_bytes; | |
2038 | bytes_done += n_bytes; | |
ea2384d3 | 2039 | } |
ea2384d3 | 2040 | |
f10cc243 KW |
2041 | ret = 0; |
2042 | fail: | |
2914caa0 | 2043 | qemu_co_mutex_unlock(&s->lock); |
f10cc243 KW |
2044 | qemu_iovec_destroy(&local_qiov); |
2045 | ||
2914caa0 PB |
2046 | return ret; |
2047 | } | |
2048 | ||
cdeaf1f1 FZ |
2049 | /** |
2050 | * vmdk_write: | |
2051 | * @zeroed: buf is ignored (data is zero), use zeroed_grain GTE feature | |
8e507243 FZ |
2052 | * if possible, otherwise return -ENOTSUP. |
2053 | * @zero_dry_run: used for zeroed == true only, don't update L2 table, just try | |
2054 | * with each cluster. By dry run we can find if the zero write | |
2055 | * is possible without modifying image data. | |
cdeaf1f1 FZ |
2056 | * |
2057 | * Returns: error code with 0 for success. | |
2058 | */ | |
b9b10c35 KW |
2059 | static int coroutine_fn GRAPH_RDLOCK |
2060 | vmdk_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes, | |
2061 | QEMUIOVector *qiov, bool zeroed, bool zero_dry_run) | |
ea2384d3 | 2062 | { |
ff1afc72 | 2063 | BDRVVmdkState *s = bs->opaque; |
b3976d3c | 2064 | VmdkExtent *extent = NULL; |
585ea0c8 | 2065 | int ret; |
37b1d7d8 | 2066 | int64_t offset_in_cluster, n_bytes; |
ff1afc72 | 2067 | uint64_t cluster_offset; |
37b1d7d8 | 2068 | uint64_t bytes_done = 0; |
b3976d3c | 2069 | VmdkMetaData m_data; |
ff1afc72 | 2070 | |
37b1d7d8 KW |
2071 | if (DIV_ROUND_UP(offset, BDRV_SECTOR_SIZE) > bs->total_sectors) { |
2072 | error_report("Wrong offset: offset=0x%" PRIx64 | |
9af9e0fe | 2073 | " total_sectors=0x%" PRIx64, |
37b1d7d8 | 2074 | offset, bs->total_sectors); |
7fa60fa3 | 2075 | return -EIO; |
630530a6 TS |
2076 | } |
2077 | ||
37b1d7d8 KW |
2078 | while (bytes > 0) { |
2079 | extent = find_extent(s, offset >> BDRV_SECTOR_BITS, extent); | |
b3976d3c FZ |
2080 | if (!extent) { |
2081 | return -EIO; | |
2082 | } | |
98eb9733 SE |
2083 | if (extent->sesparse) { |
2084 | return -ENOTSUP; | |
2085 | } | |
37b1d7d8 KW |
2086 | offset_in_cluster = vmdk_find_offset_in_cluster(extent, offset); |
2087 | n_bytes = MIN(bytes, extent->cluster_sectors * BDRV_SECTOR_SIZE | |
2088 | - offset_in_cluster); | |
2089 | ||
2090 | ret = get_cluster_offset(bs, extent, &m_data, offset, | |
c6ac36e1 | 2091 | !(extent->compressed || zeroed), |
37b1d7d8 KW |
2092 | &cluster_offset, offset_in_cluster, |
2093 | offset_in_cluster + n_bytes); | |
2b2c8c5d | 2094 | if (extent->compressed) { |
65f74725 | 2095 | if (ret == VMDK_OK) { |
2b2c8c5d | 2096 | /* Refuse write to allocated cluster for streamOptimized */ |
4823970b FZ |
2097 | error_report("Could not write to allocated cluster" |
2098 | " for streamOptimized"); | |
2b2c8c5d | 2099 | return -EIO; |
2821c1cc | 2100 | } else if (!zeroed) { |
2b2c8c5d | 2101 | /* allocate */ |
37b1d7d8 | 2102 | ret = get_cluster_offset(bs, extent, &m_data, offset, |
c6ac36e1 | 2103 | true, &cluster_offset, 0, 0); |
2b2c8c5d FZ |
2104 | } |
2105 | } | |
cdeaf1f1 | 2106 | if (ret == VMDK_ERROR) { |
91b85bd3 | 2107 | return -EINVAL; |
b3976d3c | 2108 | } |
cdeaf1f1 FZ |
2109 | if (zeroed) { |
2110 | /* Do zeroed write, buf is ignored */ | |
2111 | if (extent->has_zero_grain && | |
37b1d7d8 KW |
2112 | offset_in_cluster == 0 && |
2113 | n_bytes >= extent->cluster_sectors * BDRV_SECTOR_SIZE) { | |
2114 | n_bytes = extent->cluster_sectors * BDRV_SECTOR_SIZE; | |
78cae78d | 2115 | if (!zero_dry_run && ret != VMDK_ZEROED) { |
cdeaf1f1 | 2116 | /* update L2 tables */ |
c6ac36e1 FZ |
2117 | if (vmdk_L2update(extent, &m_data, VMDK_GTE_ZEROED) |
2118 | != VMDK_OK) { | |
cdeaf1f1 FZ |
2119 | return -EIO; |
2120 | } | |
2121 | } | |
2122 | } else { | |
2123 | return -ENOTSUP; | |
2124 | } | |
2125 | } else { | |
37b1d7d8 KW |
2126 | ret = vmdk_write_extent(extent, cluster_offset, offset_in_cluster, |
2127 | qiov, bytes_done, n_bytes, offset); | |
cdeaf1f1 FZ |
2128 | if (ret) { |
2129 | return ret; | |
2130 | } | |
4dc20e64 | 2131 | if (m_data.new_allocation) { |
cdeaf1f1 | 2132 | /* update L2 tables */ |
c6ac36e1 FZ |
2133 | if (vmdk_L2update(extent, &m_data, |
2134 | cluster_offset >> BDRV_SECTOR_BITS) | |
2135 | != VMDK_OK) { | |
cdeaf1f1 FZ |
2136 | return -EIO; |
2137 | } | |
b3976d3c | 2138 | } |
630530a6 | 2139 | } |
37b1d7d8 KW |
2140 | bytes -= n_bytes; |
2141 | offset += n_bytes; | |
2142 | bytes_done += n_bytes; | |
5f4da8c0 | 2143 | |
ae261c86 FZ |
2144 | /* update CID on the first write every time the virtual disk is |
2145 | * opened */ | |
69b4d86d | 2146 | if (!s->cid_updated) { |
e5dc64b8 | 2147 | ret = vmdk_write_cid(bs, g_random_int()); |
99f1835d KW |
2148 | if (ret < 0) { |
2149 | return ret; | |
2150 | } | |
69b4d86d | 2151 | s->cid_updated = true; |
5f4da8c0 | 2152 | } |
ff1afc72 FB |
2153 | } |
2154 | return 0; | |
ea2384d3 FB |
2155 | } |
2156 | ||
b9b10c35 | 2157 | static int coroutine_fn GRAPH_RDLOCK |
e75abeda VSO |
2158 | vmdk_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes, |
2159 | QEMUIOVector *qiov, BdrvRequestFlags flags) | |
e183ef75 PB |
2160 | { |
2161 | int ret; | |
2162 | BDRVVmdkState *s = bs->opaque; | |
2163 | qemu_co_mutex_lock(&s->lock); | |
37b1d7d8 | 2164 | ret = vmdk_pwritev(bs, offset, bytes, qiov, false, false); |
cdeaf1f1 FZ |
2165 | qemu_co_mutex_unlock(&s->lock); |
2166 | return ret; | |
2167 | } | |
2168 | ||
7b1fb72e | 2169 | static int coroutine_fn GRAPH_RDLOCK |
e75abeda VSO |
2170 | vmdk_co_pwritev_compressed(BlockDriverState *bs, int64_t offset, int64_t bytes, |
2171 | QEMUIOVector *qiov) | |
ba0ad89e | 2172 | { |
51b3c6b7 YCL |
2173 | if (bytes == 0) { |
2174 | /* The caller will write bytes 0 to signal EOF. | |
2175 | * When receive it, we align EOF to a sector boundary. */ | |
2176 | BDRVVmdkState *s = bs->opaque; | |
2177 | int i, ret; | |
2178 | int64_t length; | |
2179 | ||
2180 | for (i = 0; i < s->num_extents; i++) { | |
0af02bd1 | 2181 | length = bdrv_co_getlength(s->extents[i].file->bs); |
51b3c6b7 YCL |
2182 | if (length < 0) { |
2183 | return length; | |
2184 | } | |
2185 | length = QEMU_ALIGN_UP(length, BDRV_SECTOR_SIZE); | |
a5c4e5be AF |
2186 | ret = bdrv_co_truncate(s->extents[i].file, length, false, |
2187 | PREALLOC_MODE_OFF, 0, NULL); | |
51b3c6b7 YCL |
2188 | if (ret < 0) { |
2189 | return ret; | |
2190 | } | |
2191 | } | |
2192 | return 0; | |
2193 | } | |
b2c622d3 | 2194 | return vmdk_co_pwritev(bs, offset, bytes, qiov, 0); |
ba0ad89e FZ |
2195 | } |
2196 | ||
b9b10c35 KW |
2197 | static int coroutine_fn GRAPH_RDLOCK |
2198 | vmdk_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset, int64_t bytes, | |
2199 | BdrvRequestFlags flags) | |
cdeaf1f1 FZ |
2200 | { |
2201 | int ret; | |
2202 | BDRVVmdkState *s = bs->opaque; | |
37b1d7d8 | 2203 | |
cdeaf1f1 | 2204 | qemu_co_mutex_lock(&s->lock); |
8e507243 FZ |
2205 | /* write zeroes could fail if sectors not aligned to cluster, test it with |
2206 | * dry_run == true before really updating image */ | |
37b1d7d8 | 2207 | ret = vmdk_pwritev(bs, offset, bytes, NULL, true, true); |
cdeaf1f1 | 2208 | if (!ret) { |
37b1d7d8 | 2209 | ret = vmdk_pwritev(bs, offset, bytes, NULL, true, false); |
cdeaf1f1 | 2210 | } |
e183ef75 PB |
2211 | qemu_co_mutex_unlock(&s->lock); |
2212 | return ret; | |
2213 | } | |
2214 | ||
28944f99 | 2215 | static int coroutine_fn GRAPH_UNLOCKED |
4db7ba3b KW |
2216 | vmdk_init_extent(BlockBackend *blk, int64_t filesize, bool flat, bool compress, |
2217 | bool zeroed_grain, Error **errp) | |
8979b227 | 2218 | { |
f66fd6c3 | 2219 | int ret, i; |
8979b227 | 2220 | VMDK4Header header; |
917703c1 FZ |
2221 | uint32_t tmp, magic, grains, gd_sectors, gt_size, gt_count; |
2222 | uint32_t *gd_buf = NULL; | |
2223 | int gd_buf_size; | |
0e7e1989 | 2224 | |
f66fd6c3 | 2225 | if (flat) { |
28944f99 | 2226 | ret = blk_co_truncate(blk, filesize, false, PREALLOC_MODE_OFF, 0, errp); |
f66fd6c3 | 2227 | goto exit; |
5f4da8c0 | 2228 | } |
8979b227 FB |
2229 | magic = cpu_to_be32(VMDK4_MAGIC); |
2230 | memset(&header, 0, sizeof(header)); | |
d62d9dc4 FZ |
2231 | if (compress) { |
2232 | header.version = 3; | |
2233 | } else if (zeroed_grain) { | |
2234 | header.version = 2; | |
2235 | } else { | |
2236 | header.version = 1; | |
2237 | } | |
95b0aa42 | 2238 | header.flags = VMDK4_FLAG_RGD | VMDK4_FLAG_NL_DETECT |
69e0b6df FZ |
2239 | | (compress ? VMDK4_FLAG_COMPRESS | VMDK4_FLAG_MARKER : 0) |
2240 | | (zeroed_grain ? VMDK4_FLAG_ZERO_GRAIN : 0); | |
6c031aac | 2241 | header.compressAlgorithm = compress ? VMDK4_COMPRESSION_DEFLATE : 0; |
917703c1 | 2242 | header.capacity = filesize / BDRV_SECTOR_SIZE; |
16372ff0 | 2243 | header.granularity = 128; |
917703c1 | 2244 | header.num_gtes_per_gt = BDRV_SECTOR_SIZE; |
8979b227 | 2245 | |
917703c1 FZ |
2246 | grains = DIV_ROUND_UP(filesize / BDRV_SECTOR_SIZE, header.granularity); |
2247 | gt_size = DIV_ROUND_UP(header.num_gtes_per_gt * sizeof(uint32_t), | |
2248 | BDRV_SECTOR_SIZE); | |
2249 | gt_count = DIV_ROUND_UP(grains, header.num_gtes_per_gt); | |
2250 | gd_sectors = DIV_ROUND_UP(gt_count * sizeof(uint32_t), BDRV_SECTOR_SIZE); | |
8979b227 FB |
2251 | |
2252 | header.desc_offset = 1; | |
2253 | header.desc_size = 20; | |
2254 | header.rgd_offset = header.desc_offset + header.desc_size; | |
917703c1 | 2255 | header.gd_offset = header.rgd_offset + gd_sectors + (gt_size * gt_count); |
8979b227 | 2256 | header.grain_offset = |
917703c1 FZ |
2257 | ROUND_UP(header.gd_offset + gd_sectors + (gt_size * gt_count), |
2258 | header.granularity); | |
16372ff0 AG |
2259 | /* swap endianness for all header fields */ |
2260 | header.version = cpu_to_le32(header.version); | |
2261 | header.flags = cpu_to_le32(header.flags); | |
2262 | header.capacity = cpu_to_le64(header.capacity); | |
2263 | header.granularity = cpu_to_le64(header.granularity); | |
ca8804ce | 2264 | header.num_gtes_per_gt = cpu_to_le32(header.num_gtes_per_gt); |
8979b227 FB |
2265 | header.desc_offset = cpu_to_le64(header.desc_offset); |
2266 | header.desc_size = cpu_to_le64(header.desc_size); | |
2267 | header.rgd_offset = cpu_to_le64(header.rgd_offset); | |
2268 | header.gd_offset = cpu_to_le64(header.gd_offset); | |
2269 | header.grain_offset = cpu_to_le64(header.grain_offset); | |
6c031aac | 2270 | header.compressAlgorithm = cpu_to_le16(header.compressAlgorithm); |
8979b227 FB |
2271 | |
2272 | header.check_bytes[0] = 0xa; | |
2273 | header.check_bytes[1] = 0x20; | |
2274 | header.check_bytes[2] = 0xd; | |
2275 | header.check_bytes[3] = 0xa; | |
3b46e624 TS |
2276 | |
2277 | /* write all the data */ | |
28944f99 | 2278 | ret = blk_co_pwrite(blk, 0, sizeof(magic), &magic, 0); |
917703c1 | 2279 | if (ret < 0) { |
c6bd8c70 | 2280 | error_setg(errp, QERR_IO_ERROR); |
1640366c KS |
2281 | goto exit; |
2282 | } | |
28944f99 | 2283 | ret = blk_co_pwrite(blk, sizeof(magic), sizeof(header), &header, 0); |
917703c1 | 2284 | if (ret < 0) { |
c6bd8c70 | 2285 | error_setg(errp, QERR_IO_ERROR); |
1640366c KS |
2286 | goto exit; |
2287 | } | |
8979b227 | 2288 | |
28944f99 PB |
2289 | ret = blk_co_truncate(blk, le64_to_cpu(header.grain_offset) << 9, false, |
2290 | PREALLOC_MODE_OFF, 0, errp); | |
1640366c | 2291 | if (ret < 0) { |
1640366c KS |
2292 | goto exit; |
2293 | } | |
8979b227 FB |
2294 | |
2295 | /* write grain directory */ | |
917703c1 FZ |
2296 | gd_buf_size = gd_sectors * BDRV_SECTOR_SIZE; |
2297 | gd_buf = g_malloc0(gd_buf_size); | |
2298 | for (i = 0, tmp = le64_to_cpu(header.rgd_offset) + gd_sectors; | |
1640366c | 2299 | i < gt_count; i++, tmp += gt_size) { |
917703c1 FZ |
2300 | gd_buf[i] = cpu_to_le32(tmp); |
2301 | } | |
28944f99 PB |
2302 | ret = blk_co_pwrite(blk, le64_to_cpu(header.rgd_offset) * BDRV_SECTOR_SIZE, |
2303 | gd_buf_size, gd_buf, 0); | |
917703c1 | 2304 | if (ret < 0) { |
c6bd8c70 | 2305 | error_setg(errp, QERR_IO_ERROR); |
917703c1 | 2306 | goto exit; |
1640366c | 2307 | } |
3b46e624 | 2308 | |
8979b227 | 2309 | /* write backup grain directory */ |
917703c1 | 2310 | for (i = 0, tmp = le64_to_cpu(header.gd_offset) + gd_sectors; |
1640366c | 2311 | i < gt_count; i++, tmp += gt_size) { |
917703c1 FZ |
2312 | gd_buf[i] = cpu_to_le32(tmp); |
2313 | } | |
28944f99 PB |
2314 | ret = blk_co_pwrite(blk, le64_to_cpu(header.gd_offset) * BDRV_SECTOR_SIZE, |
2315 | gd_buf_size, gd_buf, 0); | |
917703c1 | 2316 | if (ret < 0) { |
c6bd8c70 | 2317 | error_setg(errp, QERR_IO_ERROR); |
1640366c | 2318 | } |
8979b227 | 2319 | |
f66fd6c3 | 2320 | ret = 0; |
5be28490 FZ |
2321 | exit: |
2322 | g_free(gd_buf); | |
2323 | return ret; | |
2324 | } | |
2325 | ||
4db7ba3b | 2326 | static int coroutine_fn GRAPH_UNLOCKED |
4ec8df01 KW |
2327 | vmdk_create_extent(const char *filename, int64_t filesize, bool flat, |
2328 | bool compress, bool zeroed_grain, BlockBackend **pbb, | |
2329 | QemuOpts *opts, Error **errp) | |
5be28490 FZ |
2330 | { |
2331 | int ret; | |
2332 | BlockBackend *blk = NULL; | |
5be28490 | 2333 | |
2475a0d0 | 2334 | ret = bdrv_co_create_file(filename, opts, errp); |
5be28490 | 2335 | if (ret < 0) { |
5be28490 FZ |
2336 | goto exit; |
2337 | } | |
2338 | ||
882f202e KW |
2339 | blk = blk_co_new_open(filename, NULL, NULL, |
2340 | BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL, | |
2341 | errp); | |
5be28490 | 2342 | if (blk == NULL) { |
5be28490 FZ |
2343 | ret = -EIO; |
2344 | goto exit; | |
2345 | } | |
2346 | ||
2347 | blk_set_allow_write_beyond_eof(blk, true); | |
2348 | ||
2349 | ret = vmdk_init_extent(blk, filesize, flat, compress, zeroed_grain, errp); | |
917703c1 | 2350 | exit: |
c4bea169 | 2351 | if (blk) { |
5be28490 FZ |
2352 | if (pbb) { |
2353 | *pbb = blk; | |
2354 | } else { | |
b2ab5f54 | 2355 | blk_co_unref(blk); |
5be28490 FZ |
2356 | blk = NULL; |
2357 | } | |
917703c1 | 2358 | } |
f66fd6c3 FZ |
2359 | return ret; |
2360 | } | |
2361 | ||
2362 | static int filename_decompose(const char *filename, char *path, char *prefix, | |
4823970b | 2363 | char *postfix, size_t buf_len, Error **errp) |
f66fd6c3 FZ |
2364 | { |
2365 | const char *p, *q; | |
2366 | ||
2367 | if (filename == NULL || !strlen(filename)) { | |
4823970b | 2368 | error_setg(errp, "No filename provided"); |
65f74725 | 2369 | return VMDK_ERROR; |
f66fd6c3 FZ |
2370 | } |
2371 | p = strrchr(filename, '/'); | |
2372 | if (p == NULL) { | |
2373 | p = strrchr(filename, '\\'); | |
2374 | } | |
2375 | if (p == NULL) { | |
2376 | p = strrchr(filename, ':'); | |
2377 | } | |
2378 | if (p != NULL) { | |
2379 | p++; | |
2380 | if (p - filename >= buf_len) { | |
65f74725 | 2381 | return VMDK_ERROR; |
f66fd6c3 FZ |
2382 | } |
2383 | pstrcpy(path, p - filename + 1, filename); | |
2384 | } else { | |
2385 | p = filename; | |
2386 | path[0] = '\0'; | |
2387 | } | |
2388 | q = strrchr(p, '.'); | |
2389 | if (q == NULL) { | |
2390 | pstrcpy(prefix, buf_len, p); | |
2391 | postfix[0] = '\0'; | |
2392 | } else { | |
2393 | if (q - p >= buf_len) { | |
65f74725 | 2394 | return VMDK_ERROR; |
f66fd6c3 FZ |
2395 | } |
2396 | pstrcpy(prefix, q - p + 1, p); | |
2397 | pstrcpy(postfix, buf_len, q); | |
2398 | } | |
65f74725 | 2399 | return VMDK_OK; |
f66fd6c3 FZ |
2400 | } |
2401 | ||
3015372d FZ |
2402 | /* |
2403 | * idx == 0: get or create the descriptor file (also the image file if in a | |
2404 | * non-split format. | |
2405 | * idx >= 1: get the n-th extent if in a split subformat | |
2406 | */ | |
4db7ba3b | 2407 | typedef BlockBackend * coroutine_fn GRAPH_UNLOCKED_PTR |
4ec8df01 KW |
2408 | (*vmdk_create_extent_fn)(int64_t size, int idx, bool flat, bool split, |
2409 | bool compress, bool zeroed_grain, void *opaque, | |
2410 | Error **errp); | |
3015372d FZ |
2411 | |
2412 | static void vmdk_desc_add_extent(GString *desc, | |
2413 | const char *extent_line_fmt, | |
2414 | int64_t size, const char *filename) | |
2415 | { | |
2416 | char *basename = g_path_get_basename(filename); | |
2417 | ||
2418 | g_string_append_printf(desc, extent_line_fmt, | |
2419 | DIV_ROUND_UP(size, BDRV_SECTOR_SIZE), basename); | |
2420 | g_free(basename); | |
2421 | } | |
2422 | ||
4db7ba3b | 2423 | static int coroutine_fn GRAPH_UNLOCKED |
4ec8df01 KW |
2424 | vmdk_co_do_create(int64_t size, |
2425 | BlockdevVmdkSubformat subformat, | |
2426 | BlockdevVmdkAdapterType adapter_type, | |
2427 | const char *backing_file, | |
2428 | const char *hw_version, | |
2429 | const char *toolsversion, | |
2430 | bool compat6, | |
2431 | bool zeroed_grain, | |
2432 | vmdk_create_extent_fn extent_fn, | |
2433 | void *opaque, | |
2434 | Error **errp) | |
f66fd6c3 | 2435 | { |
3015372d FZ |
2436 | int extent_idx; |
2437 | BlockBackend *blk = NULL; | |
4a960ece | 2438 | BlockBackend *extent_blk; |
c13959c7 | 2439 | Error *local_err = NULL; |
af057fe7 | 2440 | char *desc = NULL; |
f66fd6c3 | 2441 | int ret = 0; |
6c031aac | 2442 | bool flat, split, compress; |
af057fe7 | 2443 | GString *ext_desc_lines; |
f66fd6c3 | 2444 | const int64_t split_size = 0x80000000; /* VMDK has constant split size */ |
3015372d FZ |
2445 | int64_t extent_size; |
2446 | int64_t created_size = 0; | |
2447 | const char *extent_line_fmt; | |
fe206562 | 2448 | char *parent_desc_line = g_malloc0(BUF_SIZE); |
f66fd6c3 | 2449 | uint32_t parent_cid = 0xffffffff; |
7f2039f6 | 2450 | uint32_t number_heads = 16; |
917703c1 | 2451 | uint32_t desc_offset = 0, desc_len; |
f66fd6c3 FZ |
2452 | const char desc_template[] = |
2453 | "# Disk DescriptorFile\n" | |
2454 | "version=1\n" | |
9b17031a FZ |
2455 | "CID=%" PRIx32 "\n" |
2456 | "parentCID=%" PRIx32 "\n" | |
f66fd6c3 FZ |
2457 | "createType=\"%s\"\n" |
2458 | "%s" | |
2459 | "\n" | |
2460 | "# Extent description\n" | |
2461 | "%s" | |
2462 | "\n" | |
2463 | "# The Disk Data Base\n" | |
2464 | "#DDB\n" | |
2465 | "\n" | |
f249924e | 2466 | "ddb.virtualHWVersion = \"%s\"\n" |
f66fd6c3 | 2467 | "ddb.geometry.cylinders = \"%" PRId64 "\"\n" |
4ab9dab5 | 2468 | "ddb.geometry.heads = \"%" PRIu32 "\"\n" |
f66fd6c3 | 2469 | "ddb.geometry.sectors = \"63\"\n" |
f3d43dfd TW |
2470 | "ddb.adapterType = \"%s\"\n" |
2471 | "ddb.toolsVersion = \"%s\"\n"; | |
f66fd6c3 | 2472 | |
af057fe7 FZ |
2473 | ext_desc_lines = g_string_new(NULL); |
2474 | ||
f66fd6c3 | 2475 | /* Read out options */ |
3015372d FZ |
2476 | if (compat6) { |
2477 | if (hw_version) { | |
f249924e JK |
2478 | error_setg(errp, |
2479 | "compat6 cannot be enabled with hwversion set"); | |
2480 | ret = -EINVAL; | |
2481 | goto exit; | |
2482 | } | |
3015372d | 2483 | hw_version = "6"; |
5820f1da | 2484 | } |
3015372d FZ |
2485 | if (!hw_version) { |
2486 | hw_version = "4"; | |
f66fd6c3 | 2487 | } |
f3d43dfd TW |
2488 | if (!toolsversion) { |
2489 | toolsversion = "2147483647"; | |
2490 | } | |
5820f1da | 2491 | |
3015372d | 2492 | if (adapter_type != BLOCKDEV_VMDK_ADAPTER_TYPE_IDE) { |
7f2039f6 OP |
2493 | /* that's the number of heads with which vmware operates when |
2494 | creating, exporting, etc. vmdk files with a non-ide adapter type */ | |
2495 | number_heads = 255; | |
2496 | } | |
3015372d FZ |
2497 | split = (subformat == BLOCKDEV_VMDK_SUBFORMAT_TWOGBMAXEXTENTFLAT) || |
2498 | (subformat == BLOCKDEV_VMDK_SUBFORMAT_TWOGBMAXEXTENTSPARSE); | |
2499 | flat = (subformat == BLOCKDEV_VMDK_SUBFORMAT_MONOLITHICFLAT) || | |
2500 | (subformat == BLOCKDEV_VMDK_SUBFORMAT_TWOGBMAXEXTENTFLAT); | |
2501 | compress = subformat == BLOCKDEV_VMDK_SUBFORMAT_STREAMOPTIMIZED; | |
2502 | ||
f66fd6c3 | 2503 | if (flat) { |
3015372d | 2504 | extent_line_fmt = "RW %" PRId64 " FLAT \"%s\" 0\n"; |
f66fd6c3 | 2505 | } else { |
3015372d | 2506 | extent_line_fmt = "RW %" PRId64 " SPARSE \"%s\"\n"; |
f66fd6c3 FZ |
2507 | } |
2508 | if (flat && backing_file) { | |
4823970b | 2509 | error_setg(errp, "Flat image can't have backing file"); |
af057fe7 FZ |
2510 | ret = -ENOTSUP; |
2511 | goto exit; | |
f66fd6c3 | 2512 | } |
52c8d629 FZ |
2513 | if (flat && zeroed_grain) { |
2514 | error_setg(errp, "Flat image can't enable zeroed grain"); | |
af057fe7 FZ |
2515 | ret = -ENOTSUP; |
2516 | goto exit; | |
52c8d629 | 2517 | } |
3015372d FZ |
2518 | |
2519 | /* Create extents */ | |
2520 | if (split) { | |
2521 | extent_size = split_size; | |
2522 | } else { | |
2523 | extent_size = size; | |
2524 | } | |
2525 | if (!split && !flat) { | |
2526 | created_size = extent_size; | |
2527 | } else { | |
2528 | created_size = 0; | |
2529 | } | |
2530 | /* Get the descriptor file BDS */ | |
2531 | blk = extent_fn(created_size, 0, flat, split, compress, zeroed_grain, | |
2532 | opaque, errp); | |
2533 | if (!blk) { | |
2534 | ret = -EIO; | |
2535 | goto exit; | |
2536 | } | |
2537 | if (!split && !flat) { | |
2538 | vmdk_desc_add_extent(ext_desc_lines, extent_line_fmt, created_size, | |
2539 | blk_bs(blk)->filename); | |
2540 | } | |
2541 | ||
f66fd6c3 | 2542 | if (backing_file) { |
3015372d | 2543 | BlockBackend *backing; |
645ae7d8 HR |
2544 | char *full_backing = |
2545 | bdrv_get_full_backing_filename_from_filename(blk_bs(blk)->filename, | |
2546 | backing_file, | |
2547 | &local_err); | |
1085daf9 | 2548 | if (local_err) { |
1085daf9 HR |
2549 | error_propagate(errp, local_err); |
2550 | ret = -ENOENT; | |
2551 | goto exit; | |
2552 | } | |
645ae7d8 | 2553 | assert(full_backing); |
c4bea169 | 2554 | |
882f202e KW |
2555 | backing = blk_co_new_open(full_backing, NULL, NULL, |
2556 | BDRV_O_NO_BACKING, errp); | |
1085daf9 | 2557 | g_free(full_backing); |
3015372d | 2558 | if (backing == NULL) { |
c4bea169 | 2559 | ret = -EIO; |
af057fe7 | 2560 | goto exit; |
f66fd6c3 | 2561 | } |
3015372d FZ |
2562 | if (strcmp(blk_bs(backing)->drv->format_name, "vmdk")) { |
2563 | error_setg(errp, "Invalid backing file format: %s. Must be vmdk", | |
2564 | blk_bs(backing)->drv->format_name); | |
b2ab5f54 | 2565 | blk_co_unref(backing); |
af057fe7 FZ |
2566 | ret = -EINVAL; |
2567 | goto exit; | |
f66fd6c3 | 2568 | } |
1f051dcb KW |
2569 | |
2570 | bdrv_graph_co_rdlock(); | |
3015372d | 2571 | ret = vmdk_read_cid(blk_bs(backing), 0, &parent_cid); |
1f051dcb | 2572 | bdrv_graph_co_rdunlock(); |
b2ab5f54 | 2573 | blk_co_unref(backing); |
9877860e | 2574 | if (ret) { |
3015372d | 2575 | error_setg(errp, "Failed to read parent CID"); |
9877860e PM |
2576 | goto exit; |
2577 | } | |
fe206562 | 2578 | snprintf(parent_desc_line, BUF_SIZE, |
8ed610a1 | 2579 | "parentFileNameHint=\"%s\"", backing_file); |
f66fd6c3 | 2580 | } |
3015372d FZ |
2581 | extent_idx = 1; |
2582 | while (created_size < size) { | |
3015372d FZ |
2583 | int64_t cur_size = MIN(size - created_size, extent_size); |
2584 | extent_blk = extent_fn(cur_size, extent_idx, flat, split, compress, | |
2585 | zeroed_grain, opaque, errp); | |
2586 | if (!extent_blk) { | |
af057fe7 FZ |
2587 | ret = -EINVAL; |
2588 | goto exit; | |
f66fd6c3 | 2589 | } |
3015372d FZ |
2590 | vmdk_desc_add_extent(ext_desc_lines, extent_line_fmt, cur_size, |
2591 | blk_bs(extent_blk)->filename); | |
2592 | created_size += cur_size; | |
2593 | extent_idx++; | |
b2ab5f54 | 2594 | blk_co_unref(extent_blk); |
f66fd6c3 | 2595 | } |
4a960ece KW |
2596 | |
2597 | /* Check whether we got excess extents */ | |
2598 | extent_blk = extent_fn(-1, extent_idx, flat, split, compress, zeroed_grain, | |
2599 | opaque, NULL); | |
2600 | if (extent_blk) { | |
b2ab5f54 | 2601 | blk_co_unref(extent_blk); |
4a960ece KW |
2602 | error_setg(errp, "List of extents contains unused extents"); |
2603 | ret = -EINVAL; | |
2604 | goto exit; | |
2605 | } | |
2606 | ||
f66fd6c3 | 2607 | /* generate descriptor file */ |
af057fe7 | 2608 | desc = g_strdup_printf(desc_template, |
e5dc64b8 | 2609 | g_random_int(), |
af057fe7 | 2610 | parent_cid, |
3015372d | 2611 | BlockdevVmdkSubformat_str(subformat), |
af057fe7 FZ |
2612 | parent_desc_line, |
2613 | ext_desc_lines->str, | |
f249924e | 2614 | hw_version, |
3015372d | 2615 | size / |
917703c1 | 2616 | (int64_t)(63 * number_heads * BDRV_SECTOR_SIZE), |
af057fe7 | 2617 | number_heads, |
f3d43dfd TW |
2618 | BlockdevVmdkAdapterType_str(adapter_type), |
2619 | toolsversion); | |
917703c1 FZ |
2620 | desc_len = strlen(desc); |
2621 | /* the descriptor offset = 0x200 */ | |
2622 | if (!split && !flat) { | |
2623 | desc_offset = 0x200; | |
3015372d FZ |
2624 | } |
2625 | ||
a5c4e5be | 2626 | ret = blk_co_pwrite(blk, desc_offset, desc_len, desc, 0); |
3015372d FZ |
2627 | if (ret < 0) { |
2628 | error_setg_errno(errp, -ret, "Could not write description"); | |
2629 | goto exit; | |
2630 | } | |
2631 | /* bdrv_pwrite write padding zeros to align to sector, we don't need that | |
2632 | * for description file */ | |
2633 | if (desc_offset == 0) { | |
a5c4e5be | 2634 | ret = blk_co_truncate(blk, desc_len, false, PREALLOC_MODE_OFF, 0, errp); |
917703c1 | 2635 | if (ret < 0) { |
917703c1 FZ |
2636 | goto exit; |
2637 | } | |
f66fd6c3 | 2638 | } |
3015372d FZ |
2639 | ret = 0; |
2640 | exit: | |
2641 | if (blk) { | |
b2ab5f54 | 2642 | blk_co_unref(blk); |
3015372d FZ |
2643 | } |
2644 | g_free(desc); | |
2645 | g_free(parent_desc_line); | |
2646 | g_string_free(ext_desc_lines, true); | |
2647 | return ret; | |
2648 | } | |
c4bea169 | 2649 | |
3015372d FZ |
2650 | typedef struct { |
2651 | char *path; | |
2652 | char *prefix; | |
2653 | char *postfix; | |
2654 | QemuOpts *opts; | |
2655 | } VMDKCreateOptsData; | |
2656 | ||
4db7ba3b | 2657 | static BlockBackend * coroutine_fn GRAPH_UNLOCKED |
4ec8df01 KW |
2658 | vmdk_co_create_opts_cb(int64_t size, int idx, bool flat, bool split, |
2659 | bool compress, bool zeroed_grain, void *opaque, | |
2660 | Error **errp) | |
3015372d FZ |
2661 | { |
2662 | BlockBackend *blk = NULL; | |
2663 | BlockDriverState *bs = NULL; | |
2664 | VMDKCreateOptsData *data = opaque; | |
2665 | char *ext_filename = NULL; | |
2666 | char *rel_filename = NULL; | |
2667 | ||
4a960ece KW |
2668 | /* We're done, don't create excess extents. */ |
2669 | if (size == -1) { | |
2670 | assert(errp == NULL); | |
2671 | return NULL; | |
2672 | } | |
2673 | ||
3015372d FZ |
2674 | if (idx == 0) { |
2675 | rel_filename = g_strdup_printf("%s%s", data->prefix, data->postfix); | |
2676 | } else if (split) { | |
2677 | rel_filename = g_strdup_printf("%s-%c%03d%s", | |
2678 | data->prefix, | |
2679 | flat ? 'f' : 's', idx, data->postfix); | |
2680 | } else { | |
2681 | assert(idx == 1); | |
2682 | rel_filename = g_strdup_printf("%s-flat%s", data->prefix, data->postfix); | |
2683 | } | |
2684 | ||
2685 | ext_filename = g_strdup_printf("%s%s", data->path, rel_filename); | |
2686 | g_free(rel_filename); | |
2687 | ||
2688 | if (vmdk_create_extent(ext_filename, size, | |
2689 | flat, compress, zeroed_grain, &blk, data->opts, | |
2690 | errp)) { | |
af057fe7 | 2691 | goto exit; |
f66fd6c3 | 2692 | } |
b2ab5f54 | 2693 | bdrv_co_unref(bs); |
3015372d FZ |
2694 | exit: |
2695 | g_free(ext_filename); | |
2696 | return blk; | |
2697 | } | |
c4bea169 | 2698 | |
4db7ba3b | 2699 | static int coroutine_fn GRAPH_UNLOCKED |
4ec8df01 KW |
2700 | vmdk_co_create_opts(BlockDriver *drv, const char *filename, |
2701 | QemuOpts *opts, Error **errp) | |
3015372d FZ |
2702 | { |
2703 | Error *local_err = NULL; | |
2704 | char *desc = NULL; | |
2705 | int64_t total_size = 0; | |
2706 | char *adapter_type = NULL; | |
2707 | BlockdevVmdkAdapterType adapter_type_enum; | |
2708 | char *backing_file = NULL; | |
2709 | char *hw_version = NULL; | |
f3d43dfd | 2710 | char *toolsversion = NULL; |
3015372d FZ |
2711 | char *fmt = NULL; |
2712 | BlockdevVmdkSubformat subformat; | |
2713 | int ret = 0; | |
2714 | char *path = g_malloc0(PATH_MAX); | |
2715 | char *prefix = g_malloc0(PATH_MAX); | |
2716 | char *postfix = g_malloc0(PATH_MAX); | |
2717 | char *desc_line = g_malloc0(BUF_SIZE); | |
2718 | char *ext_filename = g_malloc0(PATH_MAX); | |
2719 | char *desc_filename = g_malloc0(PATH_MAX); | |
2720 | char *parent_desc_line = g_malloc0(BUF_SIZE); | |
2721 | bool zeroed_grain; | |
2722 | bool compat6; | |
2723 | VMDKCreateOptsData data; | |
d51a814c EB |
2724 | char *backing_fmt = NULL; |
2725 | ||
2726 | backing_fmt = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FMT); | |
2727 | if (backing_fmt && strcmp(backing_fmt, "vmdk") != 0) { | |
2728 | error_setg(errp, "backing_file must be a vmdk image"); | |
2729 | ret = -EINVAL; | |
2730 | goto exit; | |
2731 | } | |
c4bea169 | 2732 | |
3015372d FZ |
2733 | if (filename_decompose(filename, path, prefix, postfix, PATH_MAX, errp)) { |
2734 | ret = -EINVAL; | |
917703c1 | 2735 | goto exit; |
f66fd6c3 | 2736 | } |
3015372d FZ |
2737 | /* Read out options */ |
2738 | total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), | |
2739 | BDRV_SECTOR_SIZE); | |
2740 | adapter_type = qemu_opt_get_del(opts, BLOCK_OPT_ADAPTER_TYPE); | |
2741 | backing_file = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FILE); | |
2742 | hw_version = qemu_opt_get_del(opts, BLOCK_OPT_HWVERSION); | |
f3d43dfd | 2743 | toolsversion = qemu_opt_get_del(opts, BLOCK_OPT_TOOLSVERSION); |
3015372d FZ |
2744 | compat6 = qemu_opt_get_bool_del(opts, BLOCK_OPT_COMPAT6, false); |
2745 | if (strcmp(hw_version, "undefined") == 0) { | |
2746 | g_free(hw_version); | |
26c9296c | 2747 | hw_version = NULL; |
1640366c | 2748 | } |
3015372d FZ |
2749 | fmt = qemu_opt_get_del(opts, BLOCK_OPT_SUBFMT); |
2750 | zeroed_grain = qemu_opt_get_bool_del(opts, BLOCK_OPT_ZEROED_GRAIN, false); | |
2751 | ||
2752 | if (adapter_type) { | |
2753 | adapter_type_enum = qapi_enum_parse(&BlockdevVmdkAdapterType_lookup, | |
2754 | adapter_type, | |
2755 | BLOCKDEV_VMDK_ADAPTER_TYPE_IDE, | |
2756 | &local_err); | |
2757 | if (local_err) { | |
2758 | error_propagate(errp, local_err); | |
2759 | ret = -EINVAL; | |
2760 | goto exit; | |
2761 | } | |
2762 | } else { | |
2763 | adapter_type_enum = BLOCKDEV_VMDK_ADAPTER_TYPE_IDE; | |
917703c1 | 2764 | } |
3015372d FZ |
2765 | |
2766 | if (!fmt) { | |
2767 | /* Default format to monolithicSparse */ | |
2768 | subformat = BLOCKDEV_VMDK_SUBFORMAT_MONOLITHICSPARSE; | |
2769 | } else { | |
2770 | subformat = qapi_enum_parse(&BlockdevVmdkSubformat_lookup, | |
2771 | fmt, | |
2772 | BLOCKDEV_VMDK_SUBFORMAT_MONOLITHICSPARSE, | |
2773 | &local_err); | |
2774 | if (local_err) { | |
2775 | error_propagate(errp, local_err); | |
2776 | ret = -EINVAL; | |
2777 | goto exit; | |
2778 | } | |
2779 | } | |
2780 | data = (VMDKCreateOptsData){ | |
2781 | .prefix = prefix, | |
2782 | .postfix = postfix, | |
2783 | .path = path, | |
2784 | .opts = opts, | |
2785 | }; | |
2786 | ret = vmdk_co_do_create(total_size, subformat, adapter_type_enum, | |
f3d43dfd TW |
2787 | backing_file, hw_version, toolsversion, compat6, |
2788 | zeroed_grain, vmdk_co_create_opts_cb, &data, errp); | |
3015372d FZ |
2789 | |
2790 | exit: | |
d51a814c | 2791 | g_free(backing_fmt); |
5820f1da CL |
2792 | g_free(adapter_type); |
2793 | g_free(backing_file); | |
f249924e | 2794 | g_free(hw_version); |
f3d43dfd | 2795 | g_free(toolsversion); |
5820f1da | 2796 | g_free(fmt); |
af057fe7 | 2797 | g_free(desc); |
fe206562 JC |
2798 | g_free(path); |
2799 | g_free(prefix); | |
2800 | g_free(postfix); | |
2801 | g_free(desc_line); | |
2802 | g_free(ext_filename); | |
2803 | g_free(desc_filename); | |
2804 | g_free(parent_desc_line); | |
3015372d FZ |
2805 | return ret; |
2806 | } | |
2807 | ||
4db7ba3b KW |
2808 | static BlockBackend * coroutine_fn GRAPH_UNLOCKED |
2809 | vmdk_co_create_cb(int64_t size, int idx, bool flat, bool split, bool compress, | |
2810 | bool zeroed_grain, void *opaque, Error **errp) | |
3015372d FZ |
2811 | { |
2812 | int ret; | |
2813 | BlockDriverState *bs; | |
2814 | BlockBackend *blk; | |
2815 | BlockdevCreateOptionsVmdk *opts = opaque; | |
2816 | ||
2817 | if (idx == 0) { | |
882f202e | 2818 | bs = bdrv_co_open_blockdev_ref(opts->file, errp); |
3015372d FZ |
2819 | } else { |
2820 | int i; | |
2821 | BlockdevRefList *list = opts->extents; | |
2822 | for (i = 1; i < idx; i++) { | |
2823 | if (!list || !list->next) { | |
2824 | error_setg(errp, "Extent [%d] not specified", i); | |
2825 | return NULL; | |
2826 | } | |
2827 | list = list->next; | |
2828 | } | |
2829 | if (!list) { | |
2830 | error_setg(errp, "Extent [%d] not specified", idx - 1); | |
2831 | return NULL; | |
2832 | } | |
882f202e | 2833 | bs = bdrv_co_open_blockdev_ref(list->value, errp); |
3015372d FZ |
2834 | } |
2835 | if (!bs) { | |
2836 | return NULL; | |
2837 | } | |
882f202e KW |
2838 | blk = blk_co_new_with_bs(bs, |
2839 | BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE | | |
2840 | BLK_PERM_RESIZE, | |
2841 | BLK_PERM_ALL, | |
2842 | errp); | |
a3aeeab5 | 2843 | if (!blk) { |
3015372d FZ |
2844 | return NULL; |
2845 | } | |
2846 | blk_set_allow_write_beyond_eof(blk, true); | |
b2ab5f54 | 2847 | bdrv_co_unref(bs); |
3015372d | 2848 | |
4a960ece KW |
2849 | if (size != -1) { |
2850 | ret = vmdk_init_extent(blk, size, flat, compress, zeroed_grain, errp); | |
2851 | if (ret) { | |
b2ab5f54 | 2852 | blk_co_unref(blk); |
4a960ece KW |
2853 | blk = NULL; |
2854 | } | |
3015372d FZ |
2855 | } |
2856 | return blk; | |
2857 | } | |
2858 | ||
4db7ba3b | 2859 | static int coroutine_fn GRAPH_UNLOCKED |
4ec8df01 | 2860 | vmdk_co_create(BlockdevCreateOptions *create_options, Error **errp) |
3015372d | 2861 | { |
3015372d FZ |
2862 | BlockdevCreateOptionsVmdk *opts; |
2863 | ||
2864 | opts = &create_options->u.vmdk; | |
2865 | ||
2866 | /* Validate options */ | |
2867 | if (!QEMU_IS_ALIGNED(opts->size, BDRV_SECTOR_SIZE)) { | |
2868 | error_setg(errp, "Image size must be a multiple of 512 bytes"); | |
851fd4a0 | 2869 | return -EINVAL; |
3015372d FZ |
2870 | } |
2871 | ||
851fd4a0 MA |
2872 | return vmdk_co_do_create(opts->size, |
2873 | opts->subformat, | |
2874 | opts->adapter_type, | |
2875 | opts->backing_file, | |
2876 | opts->hwversion, | |
2877 | opts->toolsversion, | |
2878 | false, | |
2879 | opts->zeroed_grain, | |
2880 | vmdk_co_create_cb, | |
2881 | opts, errp); | |
8979b227 FB |
2882 | } |
2883 | ||
e2731add | 2884 | static void vmdk_close(BlockDriverState *bs) |
ea2384d3 | 2885 | { |
2bc3166c KW |
2886 | BDRVVmdkState *s = bs->opaque; |
2887 | ||
b3976d3c | 2888 | vmdk_free_extents(bs); |
f4c129a3 | 2889 | g_free(s->create_type); |
2bc3166c | 2890 | |
c8a7fc51 | 2891 | migrate_del_blocker(&s->migration_blocker); |
ea2384d3 FB |
2892 | } |
2893 | ||
de335638 | 2894 | static int64_t coroutine_fn GRAPH_RDLOCK |
82618d7b | 2895 | vmdk_co_get_allocated_file_size(BlockDriverState *bs) |
4a1d5e1f FZ |
2896 | { |
2897 | int i; | |
2898 | int64_t ret = 0; | |
2899 | int64_t r; | |
2900 | BDRVVmdkState *s = bs->opaque; | |
2901 | ||
82618d7b | 2902 | ret = bdrv_co_get_allocated_file_size(bs->file->bs); |
4a1d5e1f FZ |
2903 | if (ret < 0) { |
2904 | return ret; | |
2905 | } | |
2906 | for (i = 0; i < s->num_extents; i++) { | |
9a4f4c31 | 2907 | if (s->extents[i].file == bs->file) { |
4a1d5e1f FZ |
2908 | continue; |
2909 | } | |
82618d7b | 2910 | r = bdrv_co_get_allocated_file_size(s->extents[i].file->bs); |
4a1d5e1f FZ |
2911 | if (r < 0) { |
2912 | return r; | |
2913 | } | |
2914 | ret += r; | |
2915 | } | |
2916 | return ret; | |
2917 | } | |
0e7e1989 | 2918 | |
06717986 | 2919 | static int GRAPH_RDLOCK vmdk_has_zero_init(BlockDriverState *bs) |
da7a50f9 FZ |
2920 | { |
2921 | int i; | |
2922 | BDRVVmdkState *s = bs->opaque; | |
2923 | ||
2924 | /* If has a flat extent and its underlying storage doesn't have zero init, | |
2925 | * return 0. */ | |
2926 | for (i = 0; i < s->num_extents; i++) { | |
2927 | if (s->extents[i].flat) { | |
24bc15d1 | 2928 | if (!bdrv_has_zero_init(s->extents[i].file->bs)) { |
da7a50f9 FZ |
2929 | return 0; |
2930 | } | |
2931 | } | |
2932 | } | |
2933 | return 1; | |
2934 | } | |
2935 | ||
b7cfc7d5 | 2936 | static VmdkExtentInfo * GRAPH_RDLOCK vmdk_get_extent_info(VmdkExtent *extent) |
f4c129a3 | 2937 | { |
456e7517 | 2938 | VmdkExtentInfo *info = g_new0(VmdkExtentInfo, 1); |
f4c129a3 | 2939 | |
f30c66ba | 2940 | bdrv_refresh_filename(extent->file->bs); |
456e7517 | 2941 | *info = (VmdkExtentInfo){ |
24bc15d1 | 2942 | .filename = g_strdup(extent->file->bs->filename), |
f4c129a3 FZ |
2943 | .format = g_strdup(extent->type), |
2944 | .virtual_size = extent->sectors * BDRV_SECTOR_SIZE, | |
2945 | .compressed = extent->compressed, | |
2946 | .has_compressed = extent->compressed, | |
2947 | .cluster_size = extent->cluster_sectors * BDRV_SECTOR_SIZE, | |
2948 | .has_cluster_size = !extent->flat, | |
2949 | }; | |
2950 | ||
2951 | return info; | |
2952 | } | |
2953 | ||
b9b10c35 KW |
2954 | static int coroutine_fn GRAPH_RDLOCK |
2955 | vmdk_co_check(BlockDriverState *bs, BdrvCheckResult *result, BdrvCheckMode fix) | |
f43aa8e1 PL |
2956 | { |
2957 | BDRVVmdkState *s = bs->opaque; | |
2958 | VmdkExtent *extent = NULL; | |
2959 | int64_t sector_num = 0; | |
17362398 | 2960 | int64_t total_sectors = bdrv_co_nb_sectors(bs); |
f43aa8e1 PL |
2961 | int ret; |
2962 | uint64_t cluster_offset; | |
2963 | ||
2964 | if (fix) { | |
2965 | return -ENOTSUP; | |
2966 | } | |
2967 | ||
2968 | for (;;) { | |
2969 | if (sector_num >= total_sectors) { | |
2970 | return 0; | |
2971 | } | |
2972 | extent = find_extent(s, sector_num, extent); | |
2973 | if (!extent) { | |
2974 | fprintf(stderr, | |
2975 | "ERROR: could not find extent for sector %" PRId64 "\n", | |
2976 | sector_num); | |
0e51b9b7 | 2977 | ret = -EINVAL; |
f43aa8e1 PL |
2978 | break; |
2979 | } | |
2980 | ret = get_cluster_offset(bs, extent, NULL, | |
2981 | sector_num << BDRV_SECTOR_BITS, | |
c6ac36e1 | 2982 | false, &cluster_offset, 0, 0); |
f43aa8e1 PL |
2983 | if (ret == VMDK_ERROR) { |
2984 | fprintf(stderr, | |
2985 | "ERROR: could not get cluster_offset for sector %" | |
2986 | PRId64 "\n", sector_num); | |
2987 | break; | |
2988 | } | |
0e51b9b7 | 2989 | if (ret == VMDK_OK) { |
0af02bd1 | 2990 | int64_t extent_len = bdrv_co_getlength(extent->file->bs); |
0e51b9b7 FZ |
2991 | if (extent_len < 0) { |
2992 | fprintf(stderr, | |
2993 | "ERROR: could not get extent file length for sector %" | |
2994 | PRId64 "\n", sector_num); | |
2995 | ret = extent_len; | |
2996 | break; | |
2997 | } | |
2998 | if (cluster_offset >= extent_len) { | |
2999 | fprintf(stderr, | |
3000 | "ERROR: cluster offset for sector %" | |
3001 | PRId64 " points after EOF\n", sector_num); | |
3002 | ret = -EINVAL; | |
3003 | break; | |
3004 | } | |
f43aa8e1 PL |
3005 | } |
3006 | sector_num += extent->cluster_sectors; | |
3007 | } | |
3008 | ||
3009 | result->corruptions++; | |
0e51b9b7 | 3010 | return ret; |
f43aa8e1 PL |
3011 | } |
3012 | ||
3574499a KW |
3013 | static ImageInfoSpecific * GRAPH_RDLOCK |
3014 | vmdk_get_specific_info(BlockDriverState *bs, Error **errp) | |
f4c129a3 FZ |
3015 | { |
3016 | int i; | |
3017 | BDRVVmdkState *s = bs->opaque; | |
3018 | ImageInfoSpecific *spec_info = g_new0(ImageInfoSpecific, 1); | |
456e7517 | 3019 | VmdkExtentInfoList **tail; |
f4c129a3 FZ |
3020 | |
3021 | *spec_info = (ImageInfoSpecific){ | |
6a8f9661 | 3022 | .type = IMAGE_INFO_SPECIFIC_KIND_VMDK, |
32bafa8f EB |
3023 | .u = { |
3024 | .vmdk.data = g_new0(ImageInfoSpecificVmdk, 1), | |
f4c129a3 FZ |
3025 | }, |
3026 | }; | |
3027 | ||
32bafa8f | 3028 | *spec_info->u.vmdk.data = (ImageInfoSpecificVmdk) { |
f4c129a3 FZ |
3029 | .create_type = g_strdup(s->create_type), |
3030 | .cid = s->cid, | |
3031 | .parent_cid = s->parent_cid, | |
3032 | }; | |
3033 | ||
c3033fd3 | 3034 | tail = &spec_info->u.vmdk.data->extents; |
f4c129a3 | 3035 | for (i = 0; i < s->num_extents; i++) { |
c3033fd3 | 3036 | QAPI_LIST_APPEND(tail, vmdk_get_extent_info(&s->extents[i])); |
f4c129a3 FZ |
3037 | } |
3038 | ||
3039 | return spec_info; | |
3040 | } | |
3041 | ||
5f583307 FZ |
3042 | static bool vmdk_extents_type_eq(const VmdkExtent *a, const VmdkExtent *b) |
3043 | { | |
3044 | return a->flat == b->flat && | |
3045 | a->compressed == b->compressed && | |
3046 | (a->flat || a->cluster_sectors == b->cluster_sectors); | |
3047 | } | |
3048 | ||
3d47eb0a EGE |
3049 | static int coroutine_fn |
3050 | vmdk_co_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) | |
74fe188c FZ |
3051 | { |
3052 | int i; | |
3053 | BDRVVmdkState *s = bs->opaque; | |
3054 | assert(s->num_extents); | |
5f583307 | 3055 | |
74fe188c FZ |
3056 | /* See if we have multiple extents but they have different cases */ |
3057 | for (i = 1; i < s->num_extents; i++) { | |
5f583307 | 3058 | if (!vmdk_extents_type_eq(&s->extents[0], &s->extents[i])) { |
74fe188c FZ |
3059 | return -ENOTSUP; |
3060 | } | |
3061 | } | |
5f583307 FZ |
3062 | bdi->needs_compressed_writes = s->extents[0].compressed; |
3063 | if (!s->extents[0].flat) { | |
3064 | bdi->cluster_size = s->extents[0].cluster_sectors << BDRV_SECTOR_BITS; | |
3065 | } | |
74fe188c FZ |
3066 | return 0; |
3067 | } | |
3068 | ||
004915a9 KW |
3069 | static void GRAPH_RDLOCK |
3070 | vmdk_gather_child_options(BlockDriverState *bs, QDict *target, | |
3071 | bool backing_overridden) | |
abc521a9 HR |
3072 | { |
3073 | /* No children but file and backing can be explicitly specified (TODO) */ | |
3074 | qdict_put(target, "file", | |
3075 | qobject_ref(bs->file->bs->full_open_options)); | |
3076 | ||
3077 | if (backing_overridden) { | |
3078 | if (bs->backing) { | |
3079 | qdict_put(target, "backing", | |
3080 | qobject_ref(bs->backing->bs->full_open_options)); | |
3081 | } else { | |
3082 | qdict_put_null(target, "backing"); | |
3083 | } | |
3084 | } | |
3085 | } | |
3086 | ||
5820f1da CL |
3087 | static QemuOptsList vmdk_create_opts = { |
3088 | .name = "vmdk-create-opts", | |
3089 | .head = QTAILQ_HEAD_INITIALIZER(vmdk_create_opts.head), | |
3090 | .desc = { | |
3091 | { | |
3092 | .name = BLOCK_OPT_SIZE, | |
3093 | .type = QEMU_OPT_SIZE, | |
3094 | .help = "Virtual disk size" | |
3095 | }, | |
3096 | { | |
3097 | .name = BLOCK_OPT_ADAPTER_TYPE, | |
3098 | .type = QEMU_OPT_STRING, | |
3099 | .help = "Virtual adapter type, can be one of " | |
3100 | "ide (default), lsilogic, buslogic or legacyESX" | |
3101 | }, | |
3102 | { | |
3103 | .name = BLOCK_OPT_BACKING_FILE, | |
3104 | .type = QEMU_OPT_STRING, | |
3105 | .help = "File name of a base image" | |
3106 | }, | |
d51a814c EB |
3107 | { |
3108 | .name = BLOCK_OPT_BACKING_FMT, | |
3109 | .type = QEMU_OPT_STRING, | |
3110 | .help = "Must be 'vmdk' if present", | |
3111 | }, | |
5820f1da CL |
3112 | { |
3113 | .name = BLOCK_OPT_COMPAT6, | |
3114 | .type = QEMU_OPT_BOOL, | |
3115 | .help = "VMDK version 6 image", | |
3116 | .def_value_str = "off" | |
3117 | }, | |
f249924e JK |
3118 | { |
3119 | .name = BLOCK_OPT_HWVERSION, | |
3120 | .type = QEMU_OPT_STRING, | |
3121 | .help = "VMDK hardware version", | |
3122 | .def_value_str = "undefined" | |
3123 | }, | |
f3d43dfd TW |
3124 | { |
3125 | .name = BLOCK_OPT_TOOLSVERSION, | |
3126 | .type = QEMU_OPT_STRING, | |
3127 | .help = "VMware guest tools version", | |
3128 | }, | |
5820f1da CL |
3129 | { |
3130 | .name = BLOCK_OPT_SUBFMT, | |
3131 | .type = QEMU_OPT_STRING, | |
3132 | .help = | |
3133 | "VMDK flat extent format, can be one of " | |
3134 | "{monolithicSparse (default) | monolithicFlat | twoGbMaxExtentSparse | twoGbMaxExtentFlat | streamOptimized} " | |
3135 | }, | |
3136 | { | |
3137 | .name = BLOCK_OPT_ZEROED_GRAIN, | |
3138 | .type = QEMU_OPT_BOOL, | |
3139 | .help = "Enable efficient zero writes " | |
3140 | "using the zeroed-grain GTE feature" | |
3141 | }, | |
3142 | { /* end of list */ } | |
3143 | } | |
0e7e1989 KW |
3144 | }; |
3145 | ||
5efa9d5a | 3146 | static BlockDriver bdrv_vmdk = { |
da7a50f9 FZ |
3147 | .format_name = "vmdk", |
3148 | .instance_size = sizeof(BDRVVmdkState), | |
3149 | .bdrv_probe = vmdk_probe, | |
3150 | .bdrv_open = vmdk_open, | |
2fd61638 | 3151 | .bdrv_co_check = vmdk_co_check, |
da7a50f9 | 3152 | .bdrv_reopen_prepare = vmdk_reopen_prepare, |
6d17e287 HR |
3153 | .bdrv_reopen_commit = vmdk_reopen_commit, |
3154 | .bdrv_reopen_abort = vmdk_reopen_abort, | |
69dca43d | 3155 | .bdrv_child_perm = bdrv_default_perms, |
f10cc243 | 3156 | .bdrv_co_preadv = vmdk_co_preadv, |
37b1d7d8 | 3157 | .bdrv_co_pwritev = vmdk_co_pwritev, |
b2c622d3 | 3158 | .bdrv_co_pwritev_compressed = vmdk_co_pwritev_compressed, |
a620f2ae | 3159 | .bdrv_co_pwrite_zeroes = vmdk_co_pwrite_zeroes, |
da7a50f9 | 3160 | .bdrv_close = vmdk_close, |
efc75e2a | 3161 | .bdrv_co_create_opts = vmdk_co_create_opts, |
3015372d | 3162 | .bdrv_co_create = vmdk_co_create, |
c72080b9 | 3163 | .bdrv_co_block_status = vmdk_co_block_status, |
82618d7b | 3164 | .bdrv_co_get_allocated_file_size = vmdk_co_get_allocated_file_size, |
da7a50f9 | 3165 | .bdrv_has_zero_init = vmdk_has_zero_init, |
f4c129a3 | 3166 | .bdrv_get_specific_info = vmdk_get_specific_info, |
d34682cd | 3167 | .bdrv_refresh_limits = vmdk_refresh_limits, |
3d47eb0a | 3168 | .bdrv_co_get_info = vmdk_co_get_info, |
abc521a9 | 3169 | .bdrv_gather_child_options = vmdk_gather_child_options, |
da7a50f9 | 3170 | |
d67066d8 | 3171 | .is_format = true, |
8ee79e70 | 3172 | .supports_backing = true, |
5820f1da | 3173 | .create_opts = &vmdk_create_opts, |
ea2384d3 | 3174 | }; |
5efa9d5a AL |
3175 | |
3176 | static void bdrv_vmdk_init(void) | |
3177 | { | |
3178 | bdrv_register(&bdrv_vmdk); | |
3179 | } | |
3180 | ||
3181 | block_init(bdrv_vmdk_init); |