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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 | */ | |
922a01a0 | 30 | |
80c71a24 | 31 | #include "qemu/osdep.h" |
baefd977 | 32 | #include "qemu/error-report.h" |
da34e65c | 33 | #include "qapi/error.h" |
737e150e | 34 | #include "block/block_int.h" |
609f45ea | 35 | #include "block/qdict.h" |
8942764f | 36 | #include "sysemu/block-backend.h" |
1de7afc9 | 37 | #include "qemu/module.h" |
922a01a0 | 38 | #include "qemu/option.h" |
1511b490 KW |
39 | #include "qapi/qmp/qdict.h" |
40 | #include "qapi/qobject-input-visitor.h" | |
41 | #include "qapi/qapi-visit-block-core.h" | |
58369e22 | 42 | #include "qemu/bswap.h" |
0d31c7c2 | 43 | #include "qemu/bitmap.h" |
5df022cf | 44 | #include "qemu/memalign.h" |
1d0f37cf | 45 | #include "migration/blocker.h" |
90fe66f0 | 46 | #include "parallels.h" |
6ada7453 TS |
47 | |
48 | /**************************************************************/ | |
49 | ||
50 | #define HEADER_MAGIC "WithoutFreeSpace" | |
d25d5980 | 51 | #define HEADER_MAGIC2 "WithouFreSpacExt" |
6ada7453 | 52 | #define HEADER_VERSION 2 |
6dd6b9f1 | 53 | #define HEADER_INUSE_MAGIC (0x746F6E59) |
555a608c | 54 | #define MAX_PARALLELS_IMAGE_FACTOR (1ull << 32) |
6ada7453 | 55 | |
f7abe0ec MAL |
56 | static QEnumLookup prealloc_mode_lookup = { |
57 | .array = (const char *const[]) { | |
58 | "falloc", | |
59 | "truncate", | |
f7abe0ec MAL |
60 | }, |
61 | .size = PRL_PREALLOC_MODE__MAX | |
d6179011 DL |
62 | }; |
63 | ||
d6179011 DL |
64 | #define PARALLELS_OPT_PREALLOC_MODE "prealloc-mode" |
65 | #define PARALLELS_OPT_PREALLOC_SIZE "prealloc-size" | |
66 | ||
67 | static QemuOptsList parallels_runtime_opts = { | |
68 | .name = "parallels", | |
69 | .head = QTAILQ_HEAD_INITIALIZER(parallels_runtime_opts.head), | |
70 | .desc = { | |
71 | { | |
72 | .name = PARALLELS_OPT_PREALLOC_SIZE, | |
73 | .type = QEMU_OPT_SIZE, | |
74 | .help = "Preallocation size on image expansion", | |
ff5bbe56 | 75 | .def_value_str = "128M", |
d6179011 DL |
76 | }, |
77 | { | |
78 | .name = PARALLELS_OPT_PREALLOC_MODE, | |
79 | .type = QEMU_OPT_STRING, | |
80 | .help = "Preallocation mode on image expansion " | |
81 | "(allowed values: falloc, truncate)", | |
82 | .def_value_str = "falloc", | |
83 | }, | |
84 | { /* end of list */ }, | |
85 | }, | |
86 | }; | |
87 | ||
1511b490 KW |
88 | static QemuOptsList parallels_create_opts = { |
89 | .name = "parallels-create-opts", | |
90 | .head = QTAILQ_HEAD_INITIALIZER(parallels_create_opts.head), | |
91 | .desc = { | |
92 | { | |
93 | .name = BLOCK_OPT_SIZE, | |
94 | .type = QEMU_OPT_SIZE, | |
95 | .help = "Virtual disk size", | |
96 | }, | |
97 | { | |
98 | .name = BLOCK_OPT_CLUSTER_SIZE, | |
99 | .type = QEMU_OPT_SIZE, | |
100 | .help = "Parallels image cluster size", | |
101 | .def_value_str = stringify(DEFAULT_CLUSTER_SIZE), | |
102 | }, | |
103 | { /* end of list */ } | |
104 | } | |
105 | }; | |
106 | ||
d6179011 | 107 | |
555cc9d9 DL |
108 | static int64_t bat2sect(BDRVParallelsState *s, uint32_t idx) |
109 | { | |
dd97cdc0 | 110 | return (uint64_t)le32_to_cpu(s->bat_bitmap[idx]) * s->off_multiplier; |
555cc9d9 DL |
111 | } |
112 | ||
2d68e22e DL |
113 | static uint32_t bat_entry_off(uint32_t idx) |
114 | { | |
115 | return sizeof(ParallelsHeader) + sizeof(uint32_t) * idx; | |
116 | } | |
117 | ||
29442569 | 118 | static int64_t seek_to_sector(BDRVParallelsState *s, int64_t sector_num) |
6ada7453 | 119 | { |
c34d2451 | 120 | uint32_t index, offset; |
6ada7453 TS |
121 | |
122 | index = sector_num / s->tracks; | |
123 | offset = sector_num % s->tracks; | |
124 | ||
9d8b88f6 | 125 | /* not allocated */ |
369f7de9 | 126 | if ((index >= s->bat_size) || (s->bat_bitmap[index] == 0)) { |
f08e2f84 | 127 | return -1; |
369f7de9 | 128 | } |
555cc9d9 | 129 | return bat2sect(s, index) + offset; |
6ada7453 TS |
130 | } |
131 | ||
9de9da17 RK |
132 | static int cluster_remainder(BDRVParallelsState *s, int64_t sector_num, |
133 | int nb_sectors) | |
134 | { | |
135 | int ret = s->tracks - sector_num % s->tracks; | |
136 | return MIN(nb_sectors, ret); | |
137 | } | |
138 | ||
6953d920 DL |
139 | static int64_t block_status(BDRVParallelsState *s, int64_t sector_num, |
140 | int nb_sectors, int *pnum) | |
141 | { | |
142 | int64_t start_off = -2, prev_end_off = -2; | |
143 | ||
144 | *pnum = 0; | |
145 | while (nb_sectors > 0 || start_off == -2) { | |
146 | int64_t offset = seek_to_sector(s, sector_num); | |
147 | int to_end; | |
148 | ||
149 | if (start_off == -2) { | |
150 | start_off = offset; | |
151 | prev_end_off = offset; | |
152 | } else if (offset != prev_end_off) { | |
153 | break; | |
154 | } | |
155 | ||
156 | to_end = cluster_remainder(s, sector_num, nb_sectors); | |
157 | nb_sectors -= to_end; | |
158 | sector_num += to_end; | |
159 | *pnum += to_end; | |
160 | ||
161 | if (offset > 0) { | |
162 | prev_end_off += to_end; | |
163 | } | |
164 | } | |
165 | return start_off; | |
166 | } | |
167 | ||
b64b29b9 AI |
168 | static void parallels_set_bat_entry(BDRVParallelsState *s, |
169 | uint32_t index, uint32_t offset) | |
170 | { | |
171 | s->bat_bitmap[index] = cpu_to_le32(offset); | |
172 | bitmap_set(s->bat_dirty_bmap, bat_entry_off(index) / s->bat_dirty_block, 1); | |
173 | } | |
174 | ||
c2b8e315 KW |
175 | static int64_t coroutine_fn GRAPH_RDLOCK |
176 | allocate_clusters(BlockDriverState *bs, int64_t sector_num, | |
177 | int nb_sectors, int *pnum) | |
5a41e1fa | 178 | { |
bda4cdcb | 179 | int ret = 0; |
5a41e1fa | 180 | BDRVParallelsState *s = bs->opaque; |
d8b83e37 | 181 | int64_t pos, space, idx, to_allocate, i, len; |
5a41e1fa | 182 | |
ddd2ef2c DL |
183 | pos = block_status(s, sector_num, nb_sectors, pnum); |
184 | if (pos > 0) { | |
185 | return pos; | |
186 | } | |
5a41e1fa | 187 | |
ddd2ef2c | 188 | idx = sector_num / s->tracks; |
969401fe | 189 | to_allocate = DIV_ROUND_UP(sector_num + *pnum, s->tracks) - idx; |
86d1bd70 | 190 | |
a338dcbb AI |
191 | /* |
192 | * This function is called only by parallels_co_writev(), which will never | |
86d1bd70 HR |
193 | * pass a sector_num at or beyond the end of the image (because the block |
194 | * layer never passes such a sector_num to that function). Therefore, idx | |
195 | * is always below s->bat_size. | |
196 | * block_status() will limit *pnum so that sector_num + *pnum will not | |
197 | * exceed the image end. Therefore, idx + to_allocate cannot exceed | |
198 | * s->bat_size. | |
199 | * Note that s->bat_size is an unsigned int, therefore idx + to_allocate | |
a338dcbb AI |
200 | * will always fit into a uint32_t. |
201 | */ | |
86d1bd70 HR |
202 | assert(idx < s->bat_size && idx + to_allocate <= s->bat_size); |
203 | ||
ddd2ef2c | 204 | space = to_allocate * s->tracks; |
0af02bd1 | 205 | len = bdrv_co_getlength(bs->file->bs); |
d8b83e37 DL |
206 | if (len < 0) { |
207 | return len; | |
208 | } | |
209 | if (s->data_end + space > (len >> BDRV_SECTOR_BITS)) { | |
ddd2ef2c | 210 | space += s->prealloc_size; |
bda4cdcb EB |
211 | /* |
212 | * We require the expanded size to read back as zero. If the | |
213 | * user permitted truncation, we try that; but if it fails, we | |
214 | * force the safer-but-slower fallocate. | |
215 | */ | |
216 | if (s->prealloc_mode == PRL_PREALLOC_MODE_TRUNCATE) { | |
50688be0 AF |
217 | ret = bdrv_co_truncate(bs->file, |
218 | (s->data_end + space) << BDRV_SECTOR_BITS, | |
219 | false, PREALLOC_MODE_OFF, | |
220 | BDRV_REQ_ZERO_WRITE, NULL); | |
bda4cdcb EB |
221 | if (ret == -ENOTSUP) { |
222 | s->prealloc_mode = PRL_PREALLOC_MODE_FALLOCATE; | |
223 | } | |
224 | } | |
19f5dc15 | 225 | if (s->prealloc_mode == PRL_PREALLOC_MODE_FALLOCATE) { |
50688be0 AF |
226 | ret = bdrv_co_pwrite_zeroes(bs->file, |
227 | s->data_end << BDRV_SECTOR_BITS, | |
228 | space << BDRV_SECTOR_BITS, 0); | |
19f5dc15 DL |
229 | } |
230 | if (ret < 0) { | |
231 | return ret; | |
232 | } | |
5a41e1fa DL |
233 | } |
234 | ||
a338dcbb AI |
235 | /* |
236 | * Try to read from backing to fill empty clusters | |
bcbb3866 EK |
237 | * FIXME: 1. previous write_zeroes may be redundant |
238 | * 2. most of data we read from backing will be rewritten by | |
239 | * parallels_co_writev. On aligned-to-cluster write we do not need | |
240 | * this read at all. | |
241 | * 3. it would be good to combine write of data from backing and new | |
a338dcbb AI |
242 | * data into one write call. |
243 | */ | |
bcbb3866 EK |
244 | if (bs->backing) { |
245 | int64_t nb_cow_sectors = to_allocate * s->tracks; | |
246 | int64_t nb_cow_bytes = nb_cow_sectors << BDRV_SECTOR_BITS; | |
a4072543 | 247 | void *buf = qemu_blockalign(bs, nb_cow_bytes); |
bcbb3866 | 248 | |
a4072543 VSO |
249 | ret = bdrv_co_pread(bs->backing, idx * s->tracks * BDRV_SECTOR_SIZE, |
250 | nb_cow_bytes, buf, 0); | |
bcbb3866 | 251 | if (ret < 0) { |
a4072543 | 252 | qemu_vfree(buf); |
bcbb3866 EK |
253 | return ret; |
254 | } | |
255 | ||
eba088f9 HR |
256 | ret = bdrv_co_pwrite(bs->file, s->data_end * BDRV_SECTOR_SIZE, |
257 | nb_cow_bytes, buf, 0); | |
a4072543 | 258 | qemu_vfree(buf); |
bcbb3866 EK |
259 | if (ret < 0) { |
260 | return ret; | |
261 | } | |
262 | } | |
263 | ||
ddd2ef2c | 264 | for (i = 0; i < to_allocate; i++) { |
b64b29b9 | 265 | parallels_set_bat_entry(s, idx + i, s->data_end / s->off_multiplier); |
ddd2ef2c | 266 | s->data_end += s->tracks; |
ddd2ef2c | 267 | } |
0d31c7c2 | 268 | |
ddd2ef2c | 269 | return bat2sect(s, idx) + sector_num % s->tracks; |
5a41e1fa DL |
270 | } |
271 | ||
0d31c7c2 | 272 | |
b9b10c35 KW |
273 | static int coroutine_fn GRAPH_RDLOCK |
274 | parallels_co_flush_to_os(BlockDriverState *bs) | |
0d31c7c2 DL |
275 | { |
276 | BDRVParallelsState *s = bs->opaque; | |
277 | unsigned long size = DIV_ROUND_UP(s->header_size, s->bat_dirty_block); | |
278 | unsigned long bit; | |
279 | ||
280 | qemu_co_mutex_lock(&s->lock); | |
281 | ||
282 | bit = find_first_bit(s->bat_dirty_bmap, size); | |
283 | while (bit < size) { | |
284 | uint32_t off = bit * s->bat_dirty_block; | |
285 | uint32_t to_write = s->bat_dirty_block; | |
286 | int ret; | |
287 | ||
288 | if (off + to_write > s->header_size) { | |
289 | to_write = s->header_size - off; | |
290 | } | |
50688be0 AF |
291 | ret = bdrv_co_pwrite(bs->file, off, to_write, |
292 | (uint8_t *)s->header + off, 0); | |
0d31c7c2 DL |
293 | if (ret < 0) { |
294 | qemu_co_mutex_unlock(&s->lock); | |
295 | return ret; | |
296 | } | |
297 | bit = find_next_bit(s->bat_dirty_bmap, size, bit + 1); | |
298 | } | |
299 | bitmap_zero(s->bat_dirty_bmap, size); | |
300 | ||
301 | qemu_co_mutex_unlock(&s->lock); | |
302 | return 0; | |
303 | } | |
304 | ||
305 | ||
8e0cf59d EB |
306 | static int coroutine_fn parallels_co_block_status(BlockDriverState *bs, |
307 | bool want_zero, | |
308 | int64_t offset, | |
309 | int64_t bytes, | |
310 | int64_t *pnum, | |
311 | int64_t *map, | |
312 | BlockDriverState **file) | |
dd3bed16 RK |
313 | { |
314 | BDRVParallelsState *s = bs->opaque; | |
8e0cf59d | 315 | int count; |
dd3bed16 | 316 | |
8e0cf59d | 317 | assert(QEMU_IS_ALIGNED(offset | bytes, BDRV_SECTOR_SIZE)); |
dd3bed16 | 318 | qemu_co_mutex_lock(&s->lock); |
8e0cf59d EB |
319 | offset = block_status(s, offset >> BDRV_SECTOR_BITS, |
320 | bytes >> BDRV_SECTOR_BITS, &count); | |
dd3bed16 RK |
321 | qemu_co_mutex_unlock(&s->lock); |
322 | ||
8e0cf59d | 323 | *pnum = count * BDRV_SECTOR_SIZE; |
dd3bed16 RK |
324 | if (offset < 0) { |
325 | return 0; | |
326 | } | |
327 | ||
8e0cf59d | 328 | *map = offset * BDRV_SECTOR_SIZE; |
ddf4987d | 329 | *file = bs->file->bs; |
8e0cf59d | 330 | return BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID; |
dd3bed16 RK |
331 | } |
332 | ||
7b1fb72e KW |
333 | static int coroutine_fn GRAPH_RDLOCK |
334 | parallels_co_writev(BlockDriverState *bs, int64_t sector_num, int nb_sectors, | |
335 | QEMUIOVector *qiov, int flags) | |
5a41e1fa DL |
336 | { |
337 | BDRVParallelsState *s = bs->opaque; | |
338 | uint64_t bytes_done = 0; | |
339 | QEMUIOVector hd_qiov; | |
340 | int ret = 0; | |
341 | ||
342 | qemu_iovec_init(&hd_qiov, qiov->niov); | |
343 | ||
344 | while (nb_sectors > 0) { | |
345 | int64_t position; | |
346 | int n, nbytes; | |
347 | ||
348 | qemu_co_mutex_lock(&s->lock); | |
ddd2ef2c | 349 | position = allocate_clusters(bs, sector_num, nb_sectors, &n); |
5a41e1fa DL |
350 | qemu_co_mutex_unlock(&s->lock); |
351 | if (position < 0) { | |
352 | ret = (int)position; | |
353 | break; | |
354 | } | |
355 | ||
5a41e1fa DL |
356 | nbytes = n << BDRV_SECTOR_BITS; |
357 | ||
358 | qemu_iovec_reset(&hd_qiov); | |
359 | qemu_iovec_concat(&hd_qiov, qiov, bytes_done, nbytes); | |
360 | ||
d08c2a24 EB |
361 | ret = bdrv_co_pwritev(bs->file, position * BDRV_SECTOR_SIZE, nbytes, |
362 | &hd_qiov, 0); | |
5a41e1fa DL |
363 | if (ret < 0) { |
364 | break; | |
365 | } | |
366 | ||
367 | nb_sectors -= n; | |
368 | sector_num += n; | |
369 | bytes_done += nbytes; | |
370 | } | |
371 | ||
372 | qemu_iovec_destroy(&hd_qiov); | |
373 | return ret; | |
374 | } | |
375 | ||
b9b10c35 KW |
376 | static int coroutine_fn GRAPH_RDLOCK |
377 | parallels_co_readv(BlockDriverState *bs, int64_t sector_num, int nb_sectors, | |
378 | QEMUIOVector *qiov) | |
6ada7453 | 379 | { |
29442569 | 380 | BDRVParallelsState *s = bs->opaque; |
481fb9cf DL |
381 | uint64_t bytes_done = 0; |
382 | QEMUIOVector hd_qiov; | |
383 | int ret = 0; | |
384 | ||
385 | qemu_iovec_init(&hd_qiov, qiov->niov); | |
29442569 | 386 | |
6ada7453 | 387 | while (nb_sectors > 0) { |
481fb9cf DL |
388 | int64_t position; |
389 | int n, nbytes; | |
390 | ||
391 | qemu_co_mutex_lock(&s->lock); | |
6953d920 | 392 | position = block_status(s, sector_num, nb_sectors, &n); |
481fb9cf DL |
393 | qemu_co_mutex_unlock(&s->lock); |
394 | ||
481fb9cf DL |
395 | nbytes = n << BDRV_SECTOR_BITS; |
396 | ||
bcbb3866 EK |
397 | qemu_iovec_reset(&hd_qiov); |
398 | qemu_iovec_concat(&hd_qiov, qiov, bytes_done, nbytes); | |
399 | ||
481fb9cf | 400 | if (position < 0) { |
bcbb3866 | 401 | if (bs->backing) { |
d08c2a24 EB |
402 | ret = bdrv_co_preadv(bs->backing, sector_num * BDRV_SECTOR_SIZE, |
403 | nbytes, &hd_qiov, 0); | |
bcbb3866 EK |
404 | if (ret < 0) { |
405 | break; | |
406 | } | |
407 | } else { | |
408 | qemu_iovec_memset(&hd_qiov, 0, 0, nbytes); | |
409 | } | |
481fb9cf | 410 | } else { |
d08c2a24 EB |
411 | ret = bdrv_co_preadv(bs->file, position * BDRV_SECTOR_SIZE, nbytes, |
412 | &hd_qiov, 0); | |
29442569 | 413 | if (ret < 0) { |
481fb9cf | 414 | break; |
29442569 | 415 | } |
9d8b88f6 | 416 | } |
481fb9cf | 417 | |
9de9da17 RK |
418 | nb_sectors -= n; |
419 | sector_num += n; | |
481fb9cf | 420 | bytes_done += nbytes; |
6ada7453 | 421 | } |
6ada7453 | 422 | |
481fb9cf | 423 | qemu_iovec_destroy(&hd_qiov); |
2914caa0 PB |
424 | return ret; |
425 | } | |
426 | ||
96de69c7 AI |
427 | static void parallels_check_unclean(BlockDriverState *bs, |
428 | BdrvCheckResult *res, | |
429 | BdrvCheckMode fix) | |
430 | { | |
431 | BDRVParallelsState *s = bs->opaque; | |
432 | ||
433 | if (!s->header_unclean) { | |
434 | return; | |
435 | } | |
436 | ||
437 | fprintf(stderr, "%s image was not closed correctly\n", | |
438 | fix & BDRV_FIX_ERRORS ? "Repairing" : "ERROR"); | |
439 | res->corruptions++; | |
440 | if (fix & BDRV_FIX_ERRORS) { | |
441 | /* parallels_close will do the job right */ | |
442 | res->corruptions_fixed++; | |
443 | s->header_unclean = false; | |
444 | } | |
445 | } | |
49ad6467 | 446 | |
6d416e56 AI |
447 | static int coroutine_fn GRAPH_RDLOCK |
448 | parallels_check_outside_image(BlockDriverState *bs, BdrvCheckResult *res, | |
449 | BdrvCheckMode fix) | |
450 | { | |
451 | BDRVParallelsState *s = bs->opaque; | |
452 | uint32_t i; | |
453 | int64_t off, high_off, size; | |
454 | ||
0af02bd1 | 455 | size = bdrv_co_getlength(bs->file->bs); |
6d416e56 AI |
456 | if (size < 0) { |
457 | res->check_errors++; | |
458 | return size; | |
459 | } | |
460 | ||
461 | high_off = 0; | |
462 | for (i = 0; i < s->bat_size; i++) { | |
463 | off = bat2sect(s, i) << BDRV_SECTOR_BITS; | |
029136f2 | 464 | if (off + s->cluster_size > size) { |
6d416e56 AI |
465 | fprintf(stderr, "%s cluster %u is outside image\n", |
466 | fix & BDRV_FIX_ERRORS ? "Repairing" : "ERROR", i); | |
467 | res->corruptions++; | |
468 | if (fix & BDRV_FIX_ERRORS) { | |
469 | parallels_set_bat_entry(s, i, 0); | |
470 | res->corruptions_fixed++; | |
471 | } | |
472 | continue; | |
473 | } | |
474 | if (high_off < off) { | |
475 | high_off = off; | |
476 | } | |
477 | } | |
478 | ||
479 | if (high_off == 0) { | |
480 | res->image_end_offset = s->data_end << BDRV_SECTOR_BITS; | |
481 | } else { | |
482 | res->image_end_offset = high_off + s->cluster_size; | |
483 | s->data_end = res->image_end_offset >> BDRV_SECTOR_BITS; | |
484 | } | |
485 | ||
486 | return 0; | |
487 | } | |
488 | ||
c2b8e315 | 489 | static int coroutine_fn GRAPH_RDLOCK |
09a21edf AI |
490 | parallels_check_leak(BlockDriverState *bs, BdrvCheckResult *res, |
491 | BdrvCheckMode fix) | |
49ad6467 DL |
492 | { |
493 | BDRVParallelsState *s = bs->opaque; | |
09a21edf | 494 | int64_t size; |
6d416e56 | 495 | int ret; |
49ad6467 | 496 | |
9a4f4c31 | 497 | size = bdrv_getlength(bs->file->bs); |
49ad6467 DL |
498 | if (size < 0) { |
499 | res->check_errors++; | |
500 | return size; | |
501 | } | |
502 | ||
09a21edf AI |
503 | if (size > res->image_end_offset) { |
504 | int64_t count; | |
505 | count = DIV_ROUND_UP(size - res->image_end_offset, s->cluster_size); | |
506 | fprintf(stderr, "%s space leaked at the end of the image %" PRId64 "\n", | |
507 | fix & BDRV_FIX_LEAKS ? "Repairing" : "ERROR", | |
508 | size - res->image_end_offset); | |
509 | res->leaks += count; | |
510 | if (fix & BDRV_FIX_LEAKS) { | |
511 | Error *local_err = NULL; | |
512 | ||
513 | /* | |
514 | * In order to really repair the image, we must shrink it. | |
515 | * That means we have to pass exact=true. | |
516 | */ | |
517 | ret = bdrv_co_truncate(bs->file, res->image_end_offset, true, | |
518 | PREALLOC_MODE_OFF, 0, &local_err); | |
519 | if (ret < 0) { | |
520 | error_report_err(local_err); | |
521 | res->check_errors++; | |
522 | return ret; | |
523 | } | |
524 | res->leaks_fixed += count; | |
525 | } | |
526 | } | |
527 | ||
528 | return 0; | |
529 | } | |
530 | ||
7e259e25 AI |
531 | static void parallels_collect_statistics(BlockDriverState *bs, |
532 | BdrvCheckResult *res, | |
533 | BdrvCheckMode fix) | |
09a21edf AI |
534 | { |
535 | BDRVParallelsState *s = bs->opaque; | |
7e259e25 | 536 | int64_t off, prev_off; |
09a21edf AI |
537 | uint32_t i; |
538 | ||
49ad6467 DL |
539 | res->bfi.total_clusters = s->bat_size; |
540 | res->bfi.compressed_clusters = 0; /* compression is not supported */ | |
541 | ||
49ad6467 DL |
542 | prev_off = 0; |
543 | for (i = 0; i < s->bat_size; i++) { | |
7e259e25 | 544 | off = bat2sect(s, i) << BDRV_SECTOR_BITS; |
9616f7a6 AI |
545 | /* |
546 | * If BDRV_FIX_ERRORS is not set, out-of-image BAT entries were not | |
547 | * fixed. Skip not allocated and out-of-image BAT entries. | |
548 | */ | |
549 | if (off == 0 || off + s->cluster_size > res->image_end_offset) { | |
49ad6467 DL |
550 | prev_off = 0; |
551 | continue; | |
552 | } | |
553 | ||
e0b5207f | 554 | if (prev_off != 0 && (prev_off + s->cluster_size) != off) { |
49ad6467 DL |
555 | res->bfi.fragmented_clusters++; |
556 | } | |
557 | prev_off = off; | |
7e259e25 | 558 | res->bfi.allocated_clusters++; |
49ad6467 | 559 | } |
7e259e25 AI |
560 | } |
561 | ||
562 | static int coroutine_fn GRAPH_RDLOCK | |
563 | parallels_co_check(BlockDriverState *bs, BdrvCheckResult *res, | |
564 | BdrvCheckMode fix) | |
565 | { | |
566 | BDRVParallelsState *s = bs->opaque; | |
567 | int ret; | |
568 | ||
c0fc051d AI |
569 | WITH_QEMU_LOCK_GUARD(&s->lock) { |
570 | parallels_check_unclean(bs, res, fix); | |
7e259e25 | 571 | |
c0fc051d AI |
572 | ret = parallels_check_outside_image(bs, res, fix); |
573 | if (ret < 0) { | |
574 | return ret; | |
575 | } | |
7e259e25 | 576 | |
c0fc051d AI |
577 | ret = parallels_check_leak(bs, res, fix); |
578 | if (ret < 0) { | |
579 | return ret; | |
580 | } | |
7e259e25 | 581 | |
c0fc051d | 582 | parallels_collect_statistics(bs, res, fix); |
7e259e25 AI |
583 | } |
584 | ||
c0fc051d AI |
585 | ret = bdrv_co_flush(bs); |
586 | if (ret < 0) { | |
587 | res->check_errors++; | |
3569cb7b AI |
588 | } |
589 | ||
2fd61638 | 590 | return ret; |
49ad6467 DL |
591 | } |
592 | ||
593 | ||
4db7ba3b KW |
594 | static int coroutine_fn GRAPH_UNLOCKED |
595 | parallels_co_create(BlockdevCreateOptions* opts, Error **errp) | |
74cf6c50 | 596 | { |
1511b490 KW |
597 | BlockdevCreateOptionsParallels *parallels_opts; |
598 | BlockDriverState *bs; | |
599 | BlockBackend *blk; | |
74cf6c50 | 600 | int64_t total_size, cl_size; |
369f7de9 | 601 | uint32_t bat_entries, bat_sectors; |
74cf6c50 | 602 | ParallelsHeader header; |
1511b490 | 603 | uint8_t tmp[BDRV_SECTOR_SIZE]; |
74cf6c50 DL |
604 | int ret; |
605 | ||
1511b490 KW |
606 | assert(opts->driver == BLOCKDEV_DRIVER_PARALLELS); |
607 | parallels_opts = &opts->u.parallels; | |
608 | ||
609 | /* Sanity checks */ | |
610 | total_size = parallels_opts->size; | |
611 | ||
612 | if (parallels_opts->has_cluster_size) { | |
613 | cl_size = parallels_opts->cluster_size; | |
614 | } else { | |
615 | cl_size = DEFAULT_CLUSTER_SIZE; | |
616 | } | |
617 | ||
2332d825 KW |
618 | /* XXX What is the real limit here? This is an insanely large maximum. */ |
619 | if (cl_size >= INT64_MAX / MAX_PARALLELS_IMAGE_FACTOR) { | |
620 | error_setg(errp, "Cluster size is too large"); | |
621 | return -EINVAL; | |
622 | } | |
555a608c | 623 | if (total_size >= MAX_PARALLELS_IMAGE_FACTOR * cl_size) { |
1511b490 | 624 | error_setg(errp, "Image size is too large for this cluster size"); |
555a608c KK |
625 | return -E2BIG; |
626 | } | |
74cf6c50 | 627 | |
1511b490 KW |
628 | if (!QEMU_IS_ALIGNED(total_size, BDRV_SECTOR_SIZE)) { |
629 | error_setg(errp, "Image size must be a multiple of 512 bytes"); | |
630 | return -EINVAL; | |
74cf6c50 DL |
631 | } |
632 | ||
1511b490 KW |
633 | if (!QEMU_IS_ALIGNED(cl_size, BDRV_SECTOR_SIZE)) { |
634 | error_setg(errp, "Cluster size must be a multiple of 512 bytes"); | |
635 | return -EINVAL; | |
636 | } | |
637 | ||
638 | /* Create BlockBackend to write to the image */ | |
48a4e92d | 639 | bs = bdrv_co_open_blockdev_ref(parallels_opts->file, errp); |
1511b490 | 640 | if (bs == NULL) { |
8942764f | 641 | return -EIO; |
74cf6c50 | 642 | } |
8942764f | 643 | |
48a4e92d KW |
644 | blk = blk_co_new_with_bs(bs, BLK_PERM_WRITE | BLK_PERM_RESIZE, BLK_PERM_ALL, |
645 | errp); | |
a3aeeab5 EB |
646 | if (!blk) { |
647 | ret = -EPERM; | |
1511b490 KW |
648 | goto out; |
649 | } | |
650 | blk_set_allow_write_beyond_eof(blk, true); | |
8942764f | 651 | |
1511b490 | 652 | /* Create image format */ |
369f7de9 | 653 | bat_entries = DIV_ROUND_UP(total_size, cl_size); |
2d68e22e | 654 | bat_sectors = DIV_ROUND_UP(bat_entry_off(bat_entries), cl_size); |
369f7de9 | 655 | bat_sectors = (bat_sectors * cl_size) >> BDRV_SECTOR_BITS; |
74cf6c50 DL |
656 | |
657 | memset(&header, 0, sizeof(header)); | |
658 | memcpy(header.magic, HEADER_MAGIC2, sizeof(header.magic)); | |
659 | header.version = cpu_to_le32(HEADER_VERSION); | |
660 | /* don't care much about geometry, it is not used on image level */ | |
908b1c84 KK |
661 | header.heads = cpu_to_le32(HEADS_NUMBER); |
662 | header.cylinders = cpu_to_le32(total_size / BDRV_SECTOR_SIZE | |
663 | / HEADS_NUMBER / SEC_IN_CYL); | |
74cf6c50 | 664 | header.tracks = cpu_to_le32(cl_size >> BDRV_SECTOR_BITS); |
369f7de9 | 665 | header.bat_entries = cpu_to_le32(bat_entries); |
74cf6c50 | 666 | header.nb_sectors = cpu_to_le64(DIV_ROUND_UP(total_size, BDRV_SECTOR_SIZE)); |
369f7de9 | 667 | header.data_off = cpu_to_le32(bat_sectors); |
74cf6c50 DL |
668 | |
669 | /* write all the data */ | |
670 | memset(tmp, 0, sizeof(tmp)); | |
671 | memcpy(tmp, &header, sizeof(header)); | |
672 | ||
50688be0 | 673 | ret = blk_co_pwrite(blk, 0, BDRV_SECTOR_SIZE, tmp, 0); |
74cf6c50 DL |
674 | if (ret < 0) { |
675 | goto exit; | |
676 | } | |
50688be0 AF |
677 | ret = blk_co_pwrite_zeroes(blk, BDRV_SECTOR_SIZE, |
678 | (bat_sectors - 1) << BDRV_SECTOR_BITS, 0); | |
74cf6c50 DL |
679 | if (ret < 0) { |
680 | goto exit; | |
681 | } | |
74cf6c50 | 682 | |
1511b490 KW |
683 | ret = 0; |
684 | out: | |
b2ab5f54 KW |
685 | blk_co_unref(blk); |
686 | bdrv_co_unref(bs); | |
74cf6c50 DL |
687 | return ret; |
688 | ||
689 | exit: | |
690 | error_setg_errno(errp, -ret, "Failed to create Parallels image"); | |
1511b490 KW |
691 | goto out; |
692 | } | |
693 | ||
4db7ba3b | 694 | static int coroutine_fn GRAPH_UNLOCKED |
4ec8df01 KW |
695 | parallels_co_create_opts(BlockDriver *drv, const char *filename, |
696 | QemuOpts *opts, Error **errp) | |
1511b490 KW |
697 | { |
698 | BlockdevCreateOptions *create_options = NULL; | |
1511b490 | 699 | BlockDriverState *bs = NULL; |
92adf9db | 700 | QDict *qdict; |
1511b490 KW |
701 | Visitor *v; |
702 | int ret; | |
703 | ||
704 | static const QDictRenames opt_renames[] = { | |
705 | { BLOCK_OPT_CLUSTER_SIZE, "cluster-size" }, | |
706 | { NULL, NULL }, | |
707 | }; | |
708 | ||
709 | /* Parse options and convert legacy syntax */ | |
710 | qdict = qemu_opts_to_qdict_filtered(opts, NULL, ¶llels_create_opts, | |
711 | true); | |
712 | ||
713 | if (!qdict_rename_keys(qdict, opt_renames, errp)) { | |
714 | ret = -EINVAL; | |
715 | goto done; | |
716 | } | |
717 | ||
718 | /* Create and open the file (protocol layer) */ | |
2475a0d0 | 719 | ret = bdrv_co_create_file(filename, opts, errp); |
1511b490 | 720 | if (ret < 0) { |
1511b490 KW |
721 | goto done; |
722 | } | |
723 | ||
48a4e92d KW |
724 | bs = bdrv_co_open(filename, NULL, NULL, |
725 | BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL, errp); | |
1511b490 KW |
726 | if (bs == NULL) { |
727 | ret = -EIO; | |
728 | goto done; | |
729 | } | |
730 | ||
731 | /* Now get the QAPI type BlockdevCreateOptions */ | |
732 | qdict_put_str(qdict, "driver", "parallels"); | |
733 | qdict_put_str(qdict, "file", bs->node_name); | |
734 | ||
af91062e MA |
735 | v = qobject_input_visitor_new_flat_confused(qdict, errp); |
736 | if (!v) { | |
1511b490 KW |
737 | ret = -EINVAL; |
738 | goto done; | |
739 | } | |
740 | ||
b11a093c | 741 | visit_type_BlockdevCreateOptions(v, NULL, &create_options, errp); |
1511b490 | 742 | visit_free(v); |
b11a093c | 743 | if (!create_options) { |
1511b490 KW |
744 | ret = -EINVAL; |
745 | goto done; | |
746 | } | |
747 | ||
748 | /* Silently round up sizes */ | |
749 | create_options->u.parallels.size = | |
750 | ROUND_UP(create_options->u.parallels.size, BDRV_SECTOR_SIZE); | |
751 | create_options->u.parallels.cluster_size = | |
752 | ROUND_UP(create_options->u.parallels.cluster_size, BDRV_SECTOR_SIZE); | |
753 | ||
754 | /* Create the Parallels image (format layer) */ | |
755 | ret = parallels_co_create(create_options, errp); | |
756 | if (ret < 0) { | |
757 | goto done; | |
758 | } | |
759 | ret = 0; | |
760 | ||
761 | done: | |
cb3e7f08 | 762 | qobject_unref(qdict); |
b2ab5f54 | 763 | bdrv_co_unref(bs); |
1511b490 KW |
764 | qapi_free_BlockdevCreateOptions(create_options); |
765 | return ret; | |
74cf6c50 DL |
766 | } |
767 | ||
23d6bd3b DL |
768 | |
769 | static int parallels_probe(const uint8_t *buf, int buf_size, | |
770 | const char *filename) | |
771 | { | |
772 | const ParallelsHeader *ph = (const void *)buf; | |
773 | ||
774 | if (buf_size < sizeof(ParallelsHeader)) { | |
775 | return 0; | |
776 | } | |
777 | ||
778 | if ((!memcmp(ph->magic, HEADER_MAGIC, 16) || | |
779 | !memcmp(ph->magic, HEADER_MAGIC2, 16)) && | |
780 | (le32_to_cpu(ph->version) == HEADER_VERSION)) { | |
781 | return 100; | |
782 | } | |
783 | ||
784 | return 0; | |
785 | } | |
786 | ||
6dd6b9f1 DL |
787 | static int parallels_update_header(BlockDriverState *bs) |
788 | { | |
789 | BDRVParallelsState *s = bs->opaque; | |
9a4f4c31 KW |
790 | unsigned size = MAX(bdrv_opt_mem_align(bs->file->bs), |
791 | sizeof(ParallelsHeader)); | |
6dd6b9f1 DL |
792 | |
793 | if (size > s->header_size) { | |
794 | size = s->header_size; | |
795 | } | |
32cc71de | 796 | return bdrv_pwrite_sync(bs->file, 0, size, s->header, 0); |
6dd6b9f1 DL |
797 | } |
798 | ||
23d6bd3b DL |
799 | static int parallels_open(BlockDriverState *bs, QDict *options, int flags, |
800 | Error **errp) | |
801 | { | |
802 | BDRVParallelsState *s = bs->opaque; | |
803 | ParallelsHeader ph; | |
19f5dc15 | 804 | int ret, size, i; |
f5e715db | 805 | int64_t file_nb_sectors; |
d6179011 DL |
806 | QemuOpts *opts = NULL; |
807 | Error *local_err = NULL; | |
808 | char *buf; | |
23d6bd3b | 809 | |
83930780 VSO |
810 | ret = bdrv_open_file_child(NULL, options, "file", bs, errp); |
811 | if (ret < 0) { | |
812 | return ret; | |
4e4bf5c4 KW |
813 | } |
814 | ||
f5e715db AI |
815 | file_nb_sectors = bdrv_nb_sectors(bs->file->bs); |
816 | if (file_nb_sectors < 0) { | |
817 | return -EINVAL; | |
818 | } | |
819 | ||
32cc71de | 820 | ret = bdrv_pread(bs->file, 0, sizeof(ph), &ph, 0); |
23d6bd3b DL |
821 | if (ret < 0) { |
822 | goto fail; | |
823 | } | |
824 | ||
825 | bs->total_sectors = le64_to_cpu(ph.nb_sectors); | |
826 | ||
827 | if (le32_to_cpu(ph.version) != HEADER_VERSION) { | |
828 | goto fail_format; | |
829 | } | |
830 | if (!memcmp(ph.magic, HEADER_MAGIC, 16)) { | |
831 | s->off_multiplier = 1; | |
832 | bs->total_sectors = 0xffffffff & bs->total_sectors; | |
833 | } else if (!memcmp(ph.magic, HEADER_MAGIC2, 16)) { | |
834 | s->off_multiplier = le32_to_cpu(ph.tracks); | |
835 | } else { | |
836 | goto fail_format; | |
837 | } | |
838 | ||
839 | s->tracks = le32_to_cpu(ph.tracks); | |
840 | if (s->tracks == 0) { | |
841 | error_setg(errp, "Invalid image: Zero sectors per track"); | |
842 | ret = -EINVAL; | |
843 | goto fail; | |
844 | } | |
845 | if (s->tracks > INT32_MAX/513) { | |
846 | error_setg(errp, "Invalid image: Too big cluster"); | |
847 | ret = -EFBIG; | |
848 | goto fail; | |
849 | } | |
e0b5207f | 850 | s->cluster_size = s->tracks << BDRV_SECTOR_BITS; |
23d6bd3b DL |
851 | |
852 | s->bat_size = le32_to_cpu(ph.bat_entries); | |
853 | if (s->bat_size > INT_MAX / sizeof(uint32_t)) { | |
854 | error_setg(errp, "Catalog too large"); | |
855 | ret = -EFBIG; | |
856 | goto fail; | |
857 | } | |
858 | ||
2d68e22e | 859 | size = bat_entry_off(s->bat_size); |
9a4f4c31 KW |
860 | s->header_size = ROUND_UP(size, bdrv_opt_mem_align(bs->file->bs)); |
861 | s->header = qemu_try_blockalign(bs->file->bs, s->header_size); | |
23d6bd3b DL |
862 | if (s->header == NULL) { |
863 | ret = -ENOMEM; | |
864 | goto fail; | |
865 | } | |
19f5dc15 DL |
866 | s->data_end = le32_to_cpu(ph.data_off); |
867 | if (s->data_end == 0) { | |
fcadb486 | 868 | s->data_end = DIV_ROUND_UP(size, BDRV_SECTOR_SIZE); |
19f5dc15 | 869 | } |
fcadb486 | 870 | if (s->data_end < (s->header_size >> BDRV_SECTOR_BITS)) { |
a338dcbb AI |
871 | /* |
872 | * There is not enough unused space to fit to block align between BAT | |
873 | * and actual data. We can't avoid read-modify-write... | |
874 | */ | |
23d6bd3b DL |
875 | s->header_size = size; |
876 | } | |
09eb64f9 AI |
877 | if (s->data_end > file_nb_sectors) { |
878 | error_setg(errp, "Invalid image: incorrect data_off field"); | |
879 | ret = -EINVAL; | |
880 | goto fail; | |
881 | } | |
23d6bd3b | 882 | |
32cc71de | 883 | ret = bdrv_pread(bs->file, 0, s->header_size, s->header, 0); |
23d6bd3b DL |
884 | if (ret < 0) { |
885 | goto fail; | |
886 | } | |
887 | s->bat_bitmap = (uint32_t *)(s->header + 1); | |
888 | ||
19f5dc15 DL |
889 | for (i = 0; i < s->bat_size; i++) { |
890 | int64_t off = bat2sect(s, i); | |
f5e715db AI |
891 | if (off >= file_nb_sectors) { |
892 | if (flags & BDRV_O_CHECK) { | |
893 | continue; | |
894 | } | |
895 | error_setg(errp, "parallels: Offset %" PRIi64 " in BAT[%d] entry " | |
896 | "is larger than file size (%" PRIi64 ")", | |
897 | off << BDRV_SECTOR_BITS, i, | |
898 | file_nb_sectors << BDRV_SECTOR_BITS); | |
899 | ret = -EINVAL; | |
900 | goto fail; | |
901 | } | |
19f5dc15 DL |
902 | if (off >= s->data_end) { |
903 | s->data_end = off + s->tracks; | |
904 | } | |
905 | } | |
906 | ||
6dd6b9f1 DL |
907 | if (le32_to_cpu(ph.inuse) == HEADER_INUSE_MAGIC) { |
908 | /* Image was not closed correctly. The check is mandatory */ | |
909 | s->header_unclean = true; | |
910 | if ((flags & BDRV_O_RDWR) && !(flags & BDRV_O_CHECK)) { | |
911 | error_setg(errp, "parallels: Image was not closed correctly; " | |
912 | "cannot be opened read/write"); | |
913 | ret = -EACCES; | |
914 | goto fail; | |
915 | } | |
916 | } | |
917 | ||
c6ecec43 MA |
918 | opts = qemu_opts_create(¶llels_runtime_opts, NULL, 0, errp); |
919 | if (!opts) { | |
d6179011 DL |
920 | goto fail_options; |
921 | } | |
922 | ||
a5f9b9df | 923 | if (!qemu_opts_absorb_qdict(opts, options, errp)) { |
d6179011 DL |
924 | goto fail_options; |
925 | } | |
926 | ||
927 | s->prealloc_size = | |
928 | qemu_opt_get_size_del(opts, PARALLELS_OPT_PREALLOC_SIZE, 0); | |
929 | s->prealloc_size = MAX(s->tracks, s->prealloc_size >> BDRV_SECTOR_BITS); | |
930 | buf = qemu_opt_get_del(opts, PARALLELS_OPT_PREALLOC_MODE); | |
bda4cdcb | 931 | /* prealloc_mode can be downgraded later during allocate_clusters */ |
f7abe0ec | 932 | s->prealloc_mode = qapi_enum_parse(&prealloc_mode_lookup, buf, |
06c60b6c MA |
933 | PRL_PREALLOC_MODE_FALLOCATE, |
934 | &local_err); | |
d6179011 DL |
935 | g_free(buf); |
936 | if (local_err != NULL) { | |
4bc6d7ee | 937 | error_propagate(errp, local_err); |
d6179011 DL |
938 | goto fail_options; |
939 | } | |
dc62da88 | 940 | |
baefd977 VSO |
941 | if (ph.ext_off) { |
942 | if (flags & BDRV_O_RDWR) { | |
943 | /* | |
944 | * It's unsafe to open image RW if there is an extension (as we | |
945 | * don't support it). But parallels driver in QEMU historically | |
946 | * ignores the extension, so print warning and don't care. | |
947 | */ | |
948 | warn_report("Format Extension ignored in RW mode"); | |
949 | } else { | |
950 | ret = parallels_read_format_extension( | |
951 | bs, le64_to_cpu(ph.ext_off) << BDRV_SECTOR_BITS, errp); | |
952 | if (ret < 0) { | |
953 | goto fail; | |
954 | } | |
955 | } | |
956 | } | |
957 | ||
6c7d390b | 958 | if ((flags & BDRV_O_RDWR) && !(flags & BDRV_O_INACTIVE)) { |
6dd6b9f1 DL |
959 | s->header->inuse = cpu_to_le32(HEADER_INUSE_MAGIC); |
960 | ret = parallels_update_header(bs); | |
961 | if (ret < 0) { | |
962 | goto fail; | |
963 | } | |
964 | } | |
965 | ||
8e3b0cbb | 966 | s->bat_dirty_block = 4 * qemu_real_host_page_size(); |
0d31c7c2 DL |
967 | s->bat_dirty_bmap = |
968 | bitmap_new(DIV_ROUND_UP(s->header_size, s->bat_dirty_block)); | |
969 | ||
a94750d9 | 970 | /* Disable migration until bdrv_activate method is added */ |
1d0f37cf JC |
971 | error_setg(&s->migration_blocker, "The Parallels format used by node '%s' " |
972 | "does not support live migration", | |
973 | bdrv_get_device_or_node_name(bs)); | |
386f6c07 MA |
974 | ret = migrate_add_blocker(s->migration_blocker, errp); |
975 | if (ret < 0) { | |
1d0f37cf JC |
976 | error_free(s->migration_blocker); |
977 | goto fail; | |
978 | } | |
23d6bd3b DL |
979 | qemu_co_mutex_init(&s->lock); |
980 | return 0; | |
981 | ||
982 | fail_format: | |
983 | error_setg(errp, "Image not in Parallels format"); | |
4bc6d7ee | 984 | fail_options: |
23d6bd3b DL |
985 | ret = -EINVAL; |
986 | fail: | |
987 | qemu_vfree(s->header); | |
988 | return ret; | |
989 | } | |
990 | ||
991 | ||
6ada7453 TS |
992 | static void parallels_close(BlockDriverState *bs) |
993 | { | |
994 | BDRVParallelsState *s = bs->opaque; | |
6dd6b9f1 | 995 | |
6c7d390b | 996 | if ((bs->open_flags & BDRV_O_RDWR) && !(bs->open_flags & BDRV_O_INACTIVE)) { |
6dd6b9f1 DL |
997 | s->header->inuse = 0; |
998 | parallels_update_header(bs); | |
e8d04f92 HR |
999 | |
1000 | /* errors are ignored, so we might as well pass exact=true */ | |
1001 | bdrv_truncate(bs->file, s->data_end << BDRV_SECTOR_BITS, true, | |
7b8e4857 | 1002 | PREALLOC_MODE_OFF, 0, NULL); |
19f5dc15 DL |
1003 | } |
1004 | ||
0d31c7c2 | 1005 | g_free(s->bat_dirty_bmap); |
9eae9cca | 1006 | qemu_vfree(s->header); |
1d0f37cf JC |
1007 | |
1008 | migrate_del_blocker(s->migration_blocker); | |
1009 | error_free(s->migration_blocker); | |
6ada7453 TS |
1010 | } |
1011 | ||
5efa9d5a | 1012 | static BlockDriver bdrv_parallels = { |
e60f469c AJ |
1013 | .format_name = "parallels", |
1014 | .instance_size = sizeof(BDRVParallelsState), | |
1015 | .bdrv_probe = parallels_probe, | |
1dec5a70 | 1016 | .bdrv_open = parallels_open, |
e60f469c | 1017 | .bdrv_close = parallels_close, |
69dca43d | 1018 | .bdrv_child_perm = bdrv_default_perms, |
8e0cf59d | 1019 | .bdrv_co_block_status = parallels_co_block_status, |
d0e61ce5 | 1020 | .bdrv_has_zero_init = bdrv_has_zero_init_1, |
0d31c7c2 | 1021 | .bdrv_co_flush_to_os = parallels_co_flush_to_os, |
481fb9cf | 1022 | .bdrv_co_readv = parallels_co_readv, |
5a41e1fa | 1023 | .bdrv_co_writev = parallels_co_writev, |
d67066d8 | 1024 | .is_format = true, |
bcbb3866 | 1025 | .supports_backing = true, |
1511b490 | 1026 | .bdrv_co_create = parallels_co_create, |
efc75e2a | 1027 | .bdrv_co_create_opts = parallels_co_create_opts, |
2fd61638 | 1028 | .bdrv_co_check = parallels_co_check, |
74cf6c50 | 1029 | .create_opts = ¶llels_create_opts, |
6ada7453 | 1030 | }; |
5efa9d5a AL |
1031 | |
1032 | static void bdrv_parallels_init(void) | |
1033 | { | |
1034 | bdrv_register(&bdrv_parallels); | |
1035 | } | |
1036 | ||
1037 | block_init(bdrv_parallels_init); |