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Commit | Line | Data |
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6ada7453 TS |
1 | /* |
2 | * Block driver for Parallels disk image format | |
3 | * | |
4 | * Copyright (c) 2007 Alex Beregszaszi | |
cc5690f2 | 5 | * Copyright (c) 2015 Denis V. Lunev <den@openvz.org> |
6ada7453 | 6 | * |
cc5690f2 DL |
7 | * This code was originally based on comparing different disk images created |
8 | * by Parallels. Currently it is based on opened OpenVZ sources | |
9 | * available at | |
10 | * http://git.openvz.org/?p=ploop;a=summary | |
6ada7453 TS |
11 | * |
12 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
13 | * of this software and associated documentation files (the "Software"), to deal | |
14 | * in the Software without restriction, including without limitation the rights | |
15 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
16 | * copies of the Software, and to permit persons to whom the Software is | |
17 | * furnished to do so, subject to the following conditions: | |
18 | * | |
19 | * The above copyright notice and this permission notice shall be included in | |
20 | * all copies or substantial portions of the Software. | |
21 | * | |
22 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
23 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
24 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
25 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
26 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
27 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
28 | * THE SOFTWARE. | |
29 | */ | |
80c71a24 | 30 | #include "qemu/osdep.h" |
da34e65c | 31 | #include "qapi/error.h" |
faf07963 | 32 | #include "qemu-common.h" |
737e150e | 33 | #include "block/block_int.h" |
8942764f | 34 | #include "sysemu/block-backend.h" |
1de7afc9 | 35 | #include "qemu/module.h" |
0d31c7c2 | 36 | #include "qemu/bitmap.h" |
d6179011 | 37 | #include "qapi/util.h" |
6ada7453 TS |
38 | |
39 | /**************************************************************/ | |
40 | ||
41 | #define HEADER_MAGIC "WithoutFreeSpace" | |
d25d5980 | 42 | #define HEADER_MAGIC2 "WithouFreSpacExt" |
6ada7453 | 43 | #define HEADER_VERSION 2 |
6dd6b9f1 | 44 | #define HEADER_INUSE_MAGIC (0x746F6E59) |
6ada7453 | 45 | |
74cf6c50 DL |
46 | #define DEFAULT_CLUSTER_SIZE 1048576 /* 1 MiB */ |
47 | ||
48 | ||
6ada7453 | 49 | // always little-endian |
07898904 | 50 | typedef struct ParallelsHeader { |
6ada7453 TS |
51 | char magic[16]; // "WithoutFreeSpace" |
52 | uint32_t version; | |
53 | uint32_t heads; | |
54 | uint32_t cylinders; | |
55 | uint32_t tracks; | |
369f7de9 | 56 | uint32_t bat_entries; |
8c27d54f DL |
57 | uint64_t nb_sectors; |
58 | uint32_t inuse; | |
59 | uint32_t data_off; | |
60 | char padding[12]; | |
07898904 | 61 | } QEMU_PACKED ParallelsHeader; |
6ada7453 | 62 | |
d6179011 DL |
63 | |
64 | typedef enum ParallelsPreallocMode { | |
65 | PRL_PREALLOC_MODE_FALLOCATE = 0, | |
66 | PRL_PREALLOC_MODE_TRUNCATE = 1, | |
7fb1cf16 | 67 | PRL_PREALLOC_MODE__MAX = 2, |
d6179011 DL |
68 | } ParallelsPreallocMode; |
69 | ||
70 | static const char *prealloc_mode_lookup[] = { | |
71 | "falloc", | |
72 | "truncate", | |
73 | NULL, | |
74 | }; | |
75 | ||
76 | ||
6ada7453 | 77 | typedef struct BDRVParallelsState { |
481fb9cf DL |
78 | /** Locking is conservative, the lock protects |
79 | * - image file extending (truncate, fallocate) | |
80 | * - any access to block allocation table | |
81 | */ | |
848c66e8 | 82 | CoMutex lock; |
6ada7453 | 83 | |
9eae9cca DL |
84 | ParallelsHeader *header; |
85 | uint32_t header_size; | |
6dd6b9f1 DL |
86 | bool header_unclean; |
87 | ||
0d31c7c2 DL |
88 | unsigned long *bat_dirty_bmap; |
89 | unsigned int bat_dirty_block; | |
90 | ||
369f7de9 DL |
91 | uint32_t *bat_bitmap; |
92 | unsigned int bat_size; | |
6ada7453 | 93 | |
19f5dc15 | 94 | int64_t data_end; |
d6179011 DL |
95 | uint64_t prealloc_size; |
96 | ParallelsPreallocMode prealloc_mode; | |
97 | ||
9302e863 | 98 | unsigned int tracks; |
d25d5980 DL |
99 | |
100 | unsigned int off_multiplier; | |
6ada7453 TS |
101 | } BDRVParallelsState; |
102 | ||
555cc9d9 | 103 | |
d6179011 DL |
104 | #define PARALLELS_OPT_PREALLOC_MODE "prealloc-mode" |
105 | #define PARALLELS_OPT_PREALLOC_SIZE "prealloc-size" | |
106 | ||
107 | static QemuOptsList parallels_runtime_opts = { | |
108 | .name = "parallels", | |
109 | .head = QTAILQ_HEAD_INITIALIZER(parallels_runtime_opts.head), | |
110 | .desc = { | |
111 | { | |
112 | .name = PARALLELS_OPT_PREALLOC_SIZE, | |
113 | .type = QEMU_OPT_SIZE, | |
114 | .help = "Preallocation size on image expansion", | |
115 | .def_value_str = "128MiB", | |
116 | }, | |
117 | { | |
118 | .name = PARALLELS_OPT_PREALLOC_MODE, | |
119 | .type = QEMU_OPT_STRING, | |
120 | .help = "Preallocation mode on image expansion " | |
121 | "(allowed values: falloc, truncate)", | |
122 | .def_value_str = "falloc", | |
123 | }, | |
124 | { /* end of list */ }, | |
125 | }, | |
126 | }; | |
127 | ||
128 | ||
555cc9d9 DL |
129 | static int64_t bat2sect(BDRVParallelsState *s, uint32_t idx) |
130 | { | |
dd97cdc0 | 131 | return (uint64_t)le32_to_cpu(s->bat_bitmap[idx]) * s->off_multiplier; |
555cc9d9 DL |
132 | } |
133 | ||
2d68e22e DL |
134 | static uint32_t bat_entry_off(uint32_t idx) |
135 | { | |
136 | return sizeof(ParallelsHeader) + sizeof(uint32_t) * idx; | |
137 | } | |
138 | ||
29442569 | 139 | static int64_t seek_to_sector(BDRVParallelsState *s, int64_t sector_num) |
6ada7453 | 140 | { |
c34d2451 | 141 | uint32_t index, offset; |
6ada7453 TS |
142 | |
143 | index = sector_num / s->tracks; | |
144 | offset = sector_num % s->tracks; | |
145 | ||
9d8b88f6 | 146 | /* not allocated */ |
369f7de9 | 147 | if ((index >= s->bat_size) || (s->bat_bitmap[index] == 0)) { |
f08e2f84 | 148 | return -1; |
369f7de9 | 149 | } |
555cc9d9 | 150 | return bat2sect(s, index) + offset; |
6ada7453 TS |
151 | } |
152 | ||
9de9da17 RK |
153 | static int cluster_remainder(BDRVParallelsState *s, int64_t sector_num, |
154 | int nb_sectors) | |
155 | { | |
156 | int ret = s->tracks - sector_num % s->tracks; | |
157 | return MIN(nb_sectors, ret); | |
158 | } | |
159 | ||
6953d920 DL |
160 | static int64_t block_status(BDRVParallelsState *s, int64_t sector_num, |
161 | int nb_sectors, int *pnum) | |
162 | { | |
163 | int64_t start_off = -2, prev_end_off = -2; | |
164 | ||
165 | *pnum = 0; | |
166 | while (nb_sectors > 0 || start_off == -2) { | |
167 | int64_t offset = seek_to_sector(s, sector_num); | |
168 | int to_end; | |
169 | ||
170 | if (start_off == -2) { | |
171 | start_off = offset; | |
172 | prev_end_off = offset; | |
173 | } else if (offset != prev_end_off) { | |
174 | break; | |
175 | } | |
176 | ||
177 | to_end = cluster_remainder(s, sector_num, nb_sectors); | |
178 | nb_sectors -= to_end; | |
179 | sector_num += to_end; | |
180 | *pnum += to_end; | |
181 | ||
182 | if (offset > 0) { | |
183 | prev_end_off += to_end; | |
184 | } | |
185 | } | |
186 | return start_off; | |
187 | } | |
188 | ||
ddd2ef2c DL |
189 | static int64_t allocate_clusters(BlockDriverState *bs, int64_t sector_num, |
190 | int nb_sectors, int *pnum) | |
5a41e1fa DL |
191 | { |
192 | BDRVParallelsState *s = bs->opaque; | |
ddd2ef2c DL |
193 | uint32_t idx, to_allocate, i; |
194 | int64_t pos, space; | |
5a41e1fa | 195 | |
ddd2ef2c DL |
196 | pos = block_status(s, sector_num, nb_sectors, pnum); |
197 | if (pos > 0) { | |
198 | return pos; | |
199 | } | |
5a41e1fa | 200 | |
ddd2ef2c | 201 | idx = sector_num / s->tracks; |
369f7de9 | 202 | if (idx >= s->bat_size) { |
5a41e1fa DL |
203 | return -EINVAL; |
204 | } | |
5a41e1fa | 205 | |
ddd2ef2c DL |
206 | to_allocate = (sector_num + *pnum + s->tracks - 1) / s->tracks - idx; |
207 | space = to_allocate * s->tracks; | |
9a4f4c31 | 208 | if (s->data_end + space > bdrv_getlength(bs->file->bs) >> BDRV_SECTOR_BITS) { |
19f5dc15 | 209 | int ret; |
ddd2ef2c | 210 | space += s->prealloc_size; |
19f5dc15 | 211 | if (s->prealloc_mode == PRL_PREALLOC_MODE_FALLOCATE) { |
9a4f4c31 | 212 | ret = bdrv_write_zeroes(bs->file->bs, s->data_end, space, 0); |
19f5dc15 | 213 | } else { |
9a4f4c31 | 214 | ret = bdrv_truncate(bs->file->bs, |
ddd2ef2c | 215 | (s->data_end + space) << BDRV_SECTOR_BITS); |
19f5dc15 DL |
216 | } |
217 | if (ret < 0) { | |
218 | return ret; | |
219 | } | |
5a41e1fa DL |
220 | } |
221 | ||
ddd2ef2c DL |
222 | for (i = 0; i < to_allocate; i++) { |
223 | s->bat_bitmap[idx + i] = cpu_to_le32(s->data_end / s->off_multiplier); | |
224 | s->data_end += s->tracks; | |
225 | bitmap_set(s->bat_dirty_bmap, | |
c9f6856d | 226 | bat_entry_off(idx + i) / s->bat_dirty_block, 1); |
ddd2ef2c | 227 | } |
0d31c7c2 | 228 | |
ddd2ef2c | 229 | return bat2sect(s, idx) + sector_num % s->tracks; |
5a41e1fa DL |
230 | } |
231 | ||
0d31c7c2 DL |
232 | |
233 | static coroutine_fn int parallels_co_flush_to_os(BlockDriverState *bs) | |
234 | { | |
235 | BDRVParallelsState *s = bs->opaque; | |
236 | unsigned long size = DIV_ROUND_UP(s->header_size, s->bat_dirty_block); | |
237 | unsigned long bit; | |
238 | ||
239 | qemu_co_mutex_lock(&s->lock); | |
240 | ||
241 | bit = find_first_bit(s->bat_dirty_bmap, size); | |
242 | while (bit < size) { | |
243 | uint32_t off = bit * s->bat_dirty_block; | |
244 | uint32_t to_write = s->bat_dirty_block; | |
245 | int ret; | |
246 | ||
247 | if (off + to_write > s->header_size) { | |
248 | to_write = s->header_size - off; | |
249 | } | |
9a4f4c31 KW |
250 | ret = bdrv_pwrite(bs->file->bs, off, (uint8_t *)s->header + off, |
251 | to_write); | |
0d31c7c2 DL |
252 | if (ret < 0) { |
253 | qemu_co_mutex_unlock(&s->lock); | |
254 | return ret; | |
255 | } | |
256 | bit = find_next_bit(s->bat_dirty_bmap, size, bit + 1); | |
257 | } | |
258 | bitmap_zero(s->bat_dirty_bmap, size); | |
259 | ||
260 | qemu_co_mutex_unlock(&s->lock); | |
261 | return 0; | |
262 | } | |
263 | ||
264 | ||
dd3bed16 | 265 | static int64_t coroutine_fn parallels_co_get_block_status(BlockDriverState *bs, |
67a0fd2a | 266 | int64_t sector_num, int nb_sectors, int *pnum, BlockDriverState **file) |
dd3bed16 RK |
267 | { |
268 | BDRVParallelsState *s = bs->opaque; | |
269 | int64_t offset; | |
270 | ||
271 | qemu_co_mutex_lock(&s->lock); | |
6953d920 | 272 | offset = block_status(s, sector_num, nb_sectors, pnum); |
dd3bed16 RK |
273 | qemu_co_mutex_unlock(&s->lock); |
274 | ||
dd3bed16 RK |
275 | if (offset < 0) { |
276 | return 0; | |
277 | } | |
278 | ||
ddf4987d | 279 | *file = bs->file->bs; |
dd3bed16 RK |
280 | return (offset << BDRV_SECTOR_BITS) | |
281 | BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID; | |
282 | } | |
283 | ||
5a41e1fa DL |
284 | static coroutine_fn int parallels_co_writev(BlockDriverState *bs, |
285 | int64_t sector_num, int nb_sectors, QEMUIOVector *qiov) | |
286 | { | |
287 | BDRVParallelsState *s = bs->opaque; | |
288 | uint64_t bytes_done = 0; | |
289 | QEMUIOVector hd_qiov; | |
290 | int ret = 0; | |
291 | ||
292 | qemu_iovec_init(&hd_qiov, qiov->niov); | |
293 | ||
294 | while (nb_sectors > 0) { | |
295 | int64_t position; | |
296 | int n, nbytes; | |
297 | ||
298 | qemu_co_mutex_lock(&s->lock); | |
ddd2ef2c | 299 | position = allocate_clusters(bs, sector_num, nb_sectors, &n); |
5a41e1fa DL |
300 | qemu_co_mutex_unlock(&s->lock); |
301 | if (position < 0) { | |
302 | ret = (int)position; | |
303 | break; | |
304 | } | |
305 | ||
5a41e1fa DL |
306 | nbytes = n << BDRV_SECTOR_BITS; |
307 | ||
308 | qemu_iovec_reset(&hd_qiov); | |
309 | qemu_iovec_concat(&hd_qiov, qiov, bytes_done, nbytes); | |
310 | ||
9a4f4c31 | 311 | ret = bdrv_co_writev(bs->file->bs, position, n, &hd_qiov); |
5a41e1fa DL |
312 | if (ret < 0) { |
313 | break; | |
314 | } | |
315 | ||
316 | nb_sectors -= n; | |
317 | sector_num += n; | |
318 | bytes_done += nbytes; | |
319 | } | |
320 | ||
321 | qemu_iovec_destroy(&hd_qiov); | |
322 | return ret; | |
323 | } | |
324 | ||
481fb9cf DL |
325 | static coroutine_fn int parallels_co_readv(BlockDriverState *bs, |
326 | int64_t sector_num, int nb_sectors, QEMUIOVector *qiov) | |
6ada7453 | 327 | { |
29442569 | 328 | BDRVParallelsState *s = bs->opaque; |
481fb9cf DL |
329 | uint64_t bytes_done = 0; |
330 | QEMUIOVector hd_qiov; | |
331 | int ret = 0; | |
332 | ||
333 | qemu_iovec_init(&hd_qiov, qiov->niov); | |
29442569 | 334 | |
6ada7453 | 335 | while (nb_sectors > 0) { |
481fb9cf DL |
336 | int64_t position; |
337 | int n, nbytes; | |
338 | ||
339 | qemu_co_mutex_lock(&s->lock); | |
6953d920 | 340 | position = block_status(s, sector_num, nb_sectors, &n); |
481fb9cf DL |
341 | qemu_co_mutex_unlock(&s->lock); |
342 | ||
481fb9cf DL |
343 | nbytes = n << BDRV_SECTOR_BITS; |
344 | ||
345 | if (position < 0) { | |
346 | qemu_iovec_memset(qiov, bytes_done, 0, nbytes); | |
347 | } else { | |
348 | qemu_iovec_reset(&hd_qiov); | |
349 | qemu_iovec_concat(&hd_qiov, qiov, bytes_done, nbytes); | |
350 | ||
9a4f4c31 | 351 | ret = bdrv_co_readv(bs->file->bs, position, n, &hd_qiov); |
29442569 | 352 | if (ret < 0) { |
481fb9cf | 353 | break; |
29442569 | 354 | } |
9d8b88f6 | 355 | } |
481fb9cf | 356 | |
9de9da17 RK |
357 | nb_sectors -= n; |
358 | sector_num += n; | |
481fb9cf | 359 | bytes_done += nbytes; |
6ada7453 | 360 | } |
6ada7453 | 361 | |
481fb9cf | 362 | qemu_iovec_destroy(&hd_qiov); |
2914caa0 PB |
363 | return ret; |
364 | } | |
365 | ||
49ad6467 DL |
366 | |
367 | static int parallels_check(BlockDriverState *bs, BdrvCheckResult *res, | |
368 | BdrvCheckMode fix) | |
369 | { | |
370 | BDRVParallelsState *s = bs->opaque; | |
371 | int64_t size, prev_off, high_off; | |
372 | int ret; | |
373 | uint32_t i; | |
374 | bool flush_bat = false; | |
375 | int cluster_size = s->tracks << BDRV_SECTOR_BITS; | |
376 | ||
9a4f4c31 | 377 | size = bdrv_getlength(bs->file->bs); |
49ad6467 DL |
378 | if (size < 0) { |
379 | res->check_errors++; | |
380 | return size; | |
381 | } | |
382 | ||
6dd6b9f1 DL |
383 | if (s->header_unclean) { |
384 | fprintf(stderr, "%s image was not closed correctly\n", | |
385 | fix & BDRV_FIX_ERRORS ? "Repairing" : "ERROR"); | |
386 | res->corruptions++; | |
387 | if (fix & BDRV_FIX_ERRORS) { | |
388 | /* parallels_close will do the job right */ | |
389 | res->corruptions_fixed++; | |
390 | s->header_unclean = false; | |
391 | } | |
392 | } | |
393 | ||
49ad6467 DL |
394 | res->bfi.total_clusters = s->bat_size; |
395 | res->bfi.compressed_clusters = 0; /* compression is not supported */ | |
396 | ||
397 | high_off = 0; | |
398 | prev_off = 0; | |
399 | for (i = 0; i < s->bat_size; i++) { | |
400 | int64_t off = bat2sect(s, i) << BDRV_SECTOR_BITS; | |
401 | if (off == 0) { | |
402 | prev_off = 0; | |
403 | continue; | |
404 | } | |
405 | ||
406 | /* cluster outside the image */ | |
407 | if (off > size) { | |
408 | fprintf(stderr, "%s cluster %u is outside image\n", | |
409 | fix & BDRV_FIX_ERRORS ? "Repairing" : "ERROR", i); | |
410 | res->corruptions++; | |
411 | if (fix & BDRV_FIX_ERRORS) { | |
412 | prev_off = 0; | |
413 | s->bat_bitmap[i] = 0; | |
414 | res->corruptions_fixed++; | |
415 | flush_bat = true; | |
416 | continue; | |
417 | } | |
418 | } | |
419 | ||
420 | res->bfi.allocated_clusters++; | |
421 | if (off > high_off) { | |
422 | high_off = off; | |
423 | } | |
424 | ||
425 | if (prev_off != 0 && (prev_off + cluster_size) != off) { | |
426 | res->bfi.fragmented_clusters++; | |
427 | } | |
428 | prev_off = off; | |
429 | } | |
430 | ||
431 | if (flush_bat) { | |
9a4f4c31 | 432 | ret = bdrv_pwrite_sync(bs->file->bs, 0, s->header, s->header_size); |
49ad6467 DL |
433 | if (ret < 0) { |
434 | res->check_errors++; | |
435 | return ret; | |
436 | } | |
437 | } | |
438 | ||
439 | res->image_end_offset = high_off + cluster_size; | |
440 | if (size > res->image_end_offset) { | |
441 | int64_t count; | |
442 | count = DIV_ROUND_UP(size - res->image_end_offset, cluster_size); | |
443 | fprintf(stderr, "%s space leaked at the end of the image %" PRId64 "\n", | |
444 | fix & BDRV_FIX_LEAKS ? "Repairing" : "ERROR", | |
445 | size - res->image_end_offset); | |
446 | res->leaks += count; | |
447 | if (fix & BDRV_FIX_LEAKS) { | |
9a4f4c31 | 448 | ret = bdrv_truncate(bs->file->bs, res->image_end_offset); |
49ad6467 DL |
449 | if (ret < 0) { |
450 | res->check_errors++; | |
451 | return ret; | |
452 | } | |
453 | res->leaks_fixed += count; | |
454 | } | |
455 | } | |
456 | ||
457 | return 0; | |
458 | } | |
459 | ||
460 | ||
74cf6c50 DL |
461 | static int parallels_create(const char *filename, QemuOpts *opts, Error **errp) |
462 | { | |
463 | int64_t total_size, cl_size; | |
464 | uint8_t tmp[BDRV_SECTOR_SIZE]; | |
465 | Error *local_err = NULL; | |
8942764f | 466 | BlockBackend *file; |
369f7de9 | 467 | uint32_t bat_entries, bat_sectors; |
74cf6c50 DL |
468 | ParallelsHeader header; |
469 | int ret; | |
470 | ||
471 | total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), | |
472 | BDRV_SECTOR_SIZE); | |
473 | cl_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_CLUSTER_SIZE, | |
474 | DEFAULT_CLUSTER_SIZE), BDRV_SECTOR_SIZE); | |
475 | ||
476 | ret = bdrv_create_file(filename, opts, &local_err); | |
477 | if (ret < 0) { | |
478 | error_propagate(errp, local_err); | |
479 | return ret; | |
480 | } | |
481 | ||
efaa7c4e | 482 | file = blk_new_open(filename, NULL, NULL, |
8942764f KW |
483 | BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_PROTOCOL, |
484 | &local_err); | |
485 | if (file == NULL) { | |
74cf6c50 | 486 | error_propagate(errp, local_err); |
8942764f | 487 | return -EIO; |
74cf6c50 | 488 | } |
8942764f KW |
489 | |
490 | blk_set_allow_write_beyond_eof(file, true); | |
491 | ||
492 | ret = blk_truncate(file, 0); | |
74cf6c50 DL |
493 | if (ret < 0) { |
494 | goto exit; | |
495 | } | |
496 | ||
369f7de9 | 497 | bat_entries = DIV_ROUND_UP(total_size, cl_size); |
2d68e22e | 498 | bat_sectors = DIV_ROUND_UP(bat_entry_off(bat_entries), cl_size); |
369f7de9 | 499 | bat_sectors = (bat_sectors * cl_size) >> BDRV_SECTOR_BITS; |
74cf6c50 DL |
500 | |
501 | memset(&header, 0, sizeof(header)); | |
502 | memcpy(header.magic, HEADER_MAGIC2, sizeof(header.magic)); | |
503 | header.version = cpu_to_le32(HEADER_VERSION); | |
504 | /* don't care much about geometry, it is not used on image level */ | |
505 | header.heads = cpu_to_le32(16); | |
506 | header.cylinders = cpu_to_le32(total_size / BDRV_SECTOR_SIZE / 16 / 32); | |
507 | header.tracks = cpu_to_le32(cl_size >> BDRV_SECTOR_BITS); | |
369f7de9 | 508 | header.bat_entries = cpu_to_le32(bat_entries); |
74cf6c50 | 509 | header.nb_sectors = cpu_to_le64(DIV_ROUND_UP(total_size, BDRV_SECTOR_SIZE)); |
369f7de9 | 510 | header.data_off = cpu_to_le32(bat_sectors); |
74cf6c50 DL |
511 | |
512 | /* write all the data */ | |
513 | memset(tmp, 0, sizeof(tmp)); | |
514 | memcpy(tmp, &header, sizeof(header)); | |
515 | ||
8942764f | 516 | ret = blk_pwrite(file, 0, tmp, BDRV_SECTOR_SIZE); |
74cf6c50 DL |
517 | if (ret < 0) { |
518 | goto exit; | |
519 | } | |
8942764f | 520 | ret = blk_write_zeroes(file, 1, bat_sectors - 1, 0); |
74cf6c50 DL |
521 | if (ret < 0) { |
522 | goto exit; | |
523 | } | |
524 | ret = 0; | |
525 | ||
526 | done: | |
8942764f | 527 | blk_unref(file); |
74cf6c50 DL |
528 | return ret; |
529 | ||
530 | exit: | |
531 | error_setg_errno(errp, -ret, "Failed to create Parallels image"); | |
532 | goto done; | |
533 | } | |
534 | ||
23d6bd3b DL |
535 | |
536 | static int parallels_probe(const uint8_t *buf, int buf_size, | |
537 | const char *filename) | |
538 | { | |
539 | const ParallelsHeader *ph = (const void *)buf; | |
540 | ||
541 | if (buf_size < sizeof(ParallelsHeader)) { | |
542 | return 0; | |
543 | } | |
544 | ||
545 | if ((!memcmp(ph->magic, HEADER_MAGIC, 16) || | |
546 | !memcmp(ph->magic, HEADER_MAGIC2, 16)) && | |
547 | (le32_to_cpu(ph->version) == HEADER_VERSION)) { | |
548 | return 100; | |
549 | } | |
550 | ||
551 | return 0; | |
552 | } | |
553 | ||
6dd6b9f1 DL |
554 | static int parallels_update_header(BlockDriverState *bs) |
555 | { | |
556 | BDRVParallelsState *s = bs->opaque; | |
9a4f4c31 KW |
557 | unsigned size = MAX(bdrv_opt_mem_align(bs->file->bs), |
558 | sizeof(ParallelsHeader)); | |
6dd6b9f1 DL |
559 | |
560 | if (size > s->header_size) { | |
561 | size = s->header_size; | |
562 | } | |
9a4f4c31 | 563 | return bdrv_pwrite_sync(bs->file->bs, 0, s->header, size); |
6dd6b9f1 DL |
564 | } |
565 | ||
23d6bd3b DL |
566 | static int parallels_open(BlockDriverState *bs, QDict *options, int flags, |
567 | Error **errp) | |
568 | { | |
569 | BDRVParallelsState *s = bs->opaque; | |
570 | ParallelsHeader ph; | |
19f5dc15 | 571 | int ret, size, i; |
d6179011 DL |
572 | QemuOpts *opts = NULL; |
573 | Error *local_err = NULL; | |
574 | char *buf; | |
23d6bd3b | 575 | |
9a4f4c31 | 576 | ret = bdrv_pread(bs->file->bs, 0, &ph, sizeof(ph)); |
23d6bd3b DL |
577 | if (ret < 0) { |
578 | goto fail; | |
579 | } | |
580 | ||
581 | bs->total_sectors = le64_to_cpu(ph.nb_sectors); | |
582 | ||
583 | if (le32_to_cpu(ph.version) != HEADER_VERSION) { | |
584 | goto fail_format; | |
585 | } | |
586 | if (!memcmp(ph.magic, HEADER_MAGIC, 16)) { | |
587 | s->off_multiplier = 1; | |
588 | bs->total_sectors = 0xffffffff & bs->total_sectors; | |
589 | } else if (!memcmp(ph.magic, HEADER_MAGIC2, 16)) { | |
590 | s->off_multiplier = le32_to_cpu(ph.tracks); | |
591 | } else { | |
592 | goto fail_format; | |
593 | } | |
594 | ||
595 | s->tracks = le32_to_cpu(ph.tracks); | |
596 | if (s->tracks == 0) { | |
597 | error_setg(errp, "Invalid image: Zero sectors per track"); | |
598 | ret = -EINVAL; | |
599 | goto fail; | |
600 | } | |
601 | if (s->tracks > INT32_MAX/513) { | |
602 | error_setg(errp, "Invalid image: Too big cluster"); | |
603 | ret = -EFBIG; | |
604 | goto fail; | |
605 | } | |
606 | ||
607 | s->bat_size = le32_to_cpu(ph.bat_entries); | |
608 | if (s->bat_size > INT_MAX / sizeof(uint32_t)) { | |
609 | error_setg(errp, "Catalog too large"); | |
610 | ret = -EFBIG; | |
611 | goto fail; | |
612 | } | |
613 | ||
2d68e22e | 614 | size = bat_entry_off(s->bat_size); |
9a4f4c31 KW |
615 | s->header_size = ROUND_UP(size, bdrv_opt_mem_align(bs->file->bs)); |
616 | s->header = qemu_try_blockalign(bs->file->bs, s->header_size); | |
23d6bd3b DL |
617 | if (s->header == NULL) { |
618 | ret = -ENOMEM; | |
619 | goto fail; | |
620 | } | |
19f5dc15 DL |
621 | s->data_end = le32_to_cpu(ph.data_off); |
622 | if (s->data_end == 0) { | |
623 | s->data_end = ROUND_UP(bat_entry_off(s->bat_size), BDRV_SECTOR_SIZE); | |
624 | } | |
625 | if (s->data_end < s->header_size) { | |
23d6bd3b DL |
626 | /* there is not enough unused space to fit to block align between BAT |
627 | and actual data. We can't avoid read-modify-write... */ | |
628 | s->header_size = size; | |
629 | } | |
630 | ||
9a4f4c31 | 631 | ret = bdrv_pread(bs->file->bs, 0, s->header, s->header_size); |
23d6bd3b DL |
632 | if (ret < 0) { |
633 | goto fail; | |
634 | } | |
635 | s->bat_bitmap = (uint32_t *)(s->header + 1); | |
636 | ||
19f5dc15 DL |
637 | for (i = 0; i < s->bat_size; i++) { |
638 | int64_t off = bat2sect(s, i); | |
639 | if (off >= s->data_end) { | |
640 | s->data_end = off + s->tracks; | |
641 | } | |
642 | } | |
643 | ||
6dd6b9f1 DL |
644 | if (le32_to_cpu(ph.inuse) == HEADER_INUSE_MAGIC) { |
645 | /* Image was not closed correctly. The check is mandatory */ | |
646 | s->header_unclean = true; | |
647 | if ((flags & BDRV_O_RDWR) && !(flags & BDRV_O_CHECK)) { | |
648 | error_setg(errp, "parallels: Image was not closed correctly; " | |
649 | "cannot be opened read/write"); | |
650 | ret = -EACCES; | |
651 | goto fail; | |
652 | } | |
653 | } | |
654 | ||
d6179011 DL |
655 | opts = qemu_opts_create(¶llels_runtime_opts, NULL, 0, &local_err); |
656 | if (local_err != NULL) { | |
657 | goto fail_options; | |
658 | } | |
659 | ||
660 | qemu_opts_absorb_qdict(opts, options, &local_err); | |
661 | if (local_err != NULL) { | |
662 | goto fail_options; | |
663 | } | |
664 | ||
665 | s->prealloc_size = | |
666 | qemu_opt_get_size_del(opts, PARALLELS_OPT_PREALLOC_SIZE, 0); | |
667 | s->prealloc_size = MAX(s->tracks, s->prealloc_size >> BDRV_SECTOR_BITS); | |
668 | buf = qemu_opt_get_del(opts, PARALLELS_OPT_PREALLOC_MODE); | |
669 | s->prealloc_mode = qapi_enum_parse(prealloc_mode_lookup, buf, | |
7fb1cf16 | 670 | PRL_PREALLOC_MODE__MAX, PRL_PREALLOC_MODE_FALLOCATE, &local_err); |
d6179011 DL |
671 | g_free(buf); |
672 | if (local_err != NULL) { | |
673 | goto fail_options; | |
674 | } | |
9a4f4c31 KW |
675 | if (!bdrv_has_zero_init(bs->file->bs) || |
676 | bdrv_truncate(bs->file->bs, bdrv_getlength(bs->file->bs)) != 0) { | |
d6179011 DL |
677 | s->prealloc_mode = PRL_PREALLOC_MODE_FALLOCATE; |
678 | } | |
679 | ||
6dd6b9f1 DL |
680 | if (flags & BDRV_O_RDWR) { |
681 | s->header->inuse = cpu_to_le32(HEADER_INUSE_MAGIC); | |
682 | ret = parallels_update_header(bs); | |
683 | if (ret < 0) { | |
684 | goto fail; | |
685 | } | |
686 | } | |
687 | ||
0d31c7c2 DL |
688 | s->bat_dirty_block = 4 * getpagesize(); |
689 | s->bat_dirty_bmap = | |
690 | bitmap_new(DIV_ROUND_UP(s->header_size, s->bat_dirty_block)); | |
691 | ||
23d6bd3b DL |
692 | qemu_co_mutex_init(&s->lock); |
693 | return 0; | |
694 | ||
695 | fail_format: | |
696 | error_setg(errp, "Image not in Parallels format"); | |
697 | ret = -EINVAL; | |
698 | fail: | |
699 | qemu_vfree(s->header); | |
700 | return ret; | |
d6179011 DL |
701 | |
702 | fail_options: | |
703 | error_propagate(errp, local_err); | |
704 | ret = -EINVAL; | |
705 | goto fail; | |
23d6bd3b DL |
706 | } |
707 | ||
708 | ||
6ada7453 TS |
709 | static void parallels_close(BlockDriverState *bs) |
710 | { | |
711 | BDRVParallelsState *s = bs->opaque; | |
6dd6b9f1 DL |
712 | |
713 | if (bs->open_flags & BDRV_O_RDWR) { | |
714 | s->header->inuse = 0; | |
715 | parallels_update_header(bs); | |
716 | } | |
717 | ||
19f5dc15 | 718 | if (bs->open_flags & BDRV_O_RDWR) { |
9a4f4c31 | 719 | bdrv_truncate(bs->file->bs, s->data_end << BDRV_SECTOR_BITS); |
19f5dc15 DL |
720 | } |
721 | ||
0d31c7c2 | 722 | g_free(s->bat_dirty_bmap); |
9eae9cca | 723 | qemu_vfree(s->header); |
6ada7453 TS |
724 | } |
725 | ||
74cf6c50 DL |
726 | static QemuOptsList parallels_create_opts = { |
727 | .name = "parallels-create-opts", | |
728 | .head = QTAILQ_HEAD_INITIALIZER(parallels_create_opts.head), | |
729 | .desc = { | |
730 | { | |
731 | .name = BLOCK_OPT_SIZE, | |
732 | .type = QEMU_OPT_SIZE, | |
733 | .help = "Virtual disk size", | |
734 | }, | |
735 | { | |
736 | .name = BLOCK_OPT_CLUSTER_SIZE, | |
737 | .type = QEMU_OPT_SIZE, | |
738 | .help = "Parallels image cluster size", | |
739 | .def_value_str = stringify(DEFAULT_CLUSTER_SIZE), | |
740 | }, | |
741 | { /* end of list */ } | |
742 | } | |
743 | }; | |
744 | ||
5efa9d5a | 745 | static BlockDriver bdrv_parallels = { |
e60f469c AJ |
746 | .format_name = "parallels", |
747 | .instance_size = sizeof(BDRVParallelsState), | |
748 | .bdrv_probe = parallels_probe, | |
1dec5a70 | 749 | .bdrv_open = parallels_open, |
e60f469c | 750 | .bdrv_close = parallels_close, |
dd3bed16 | 751 | .bdrv_co_get_block_status = parallels_co_get_block_status, |
d0e61ce5 | 752 | .bdrv_has_zero_init = bdrv_has_zero_init_1, |
0d31c7c2 | 753 | .bdrv_co_flush_to_os = parallels_co_flush_to_os, |
481fb9cf | 754 | .bdrv_co_readv = parallels_co_readv, |
5a41e1fa | 755 | .bdrv_co_writev = parallels_co_writev, |
74cf6c50 DL |
756 | |
757 | .bdrv_create = parallels_create, | |
49ad6467 | 758 | .bdrv_check = parallels_check, |
74cf6c50 | 759 | .create_opts = ¶llels_create_opts, |
6ada7453 | 760 | }; |
5efa9d5a AL |
761 | |
762 | static void bdrv_parallels_init(void) | |
763 | { | |
764 | bdrv_register(&bdrv_parallels); | |
765 | } | |
766 | ||
767 | block_init(bdrv_parallels_init); |