2 * Block driver for Parallels disk image format
4 * Copyright (c) 2007 Alex Beregszaszi
7 * This code was originally based on comparing different disk images created
8 * by Parallels. Currently it is based on opened OpenVZ sources
10 * http://git.openvz.org/?p=ploop;a=summary
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:
19 * The above copyright notice and this permission notice shall be included in
20 * all copies or substantial portions of the Software.
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
31 #include "qemu/osdep.h"
32 #include "qapi/error.h"
33 #include "block/block_int.h"
34 #include "block/qdict.h"
35 #include "sysemu/block-backend.h"
36 #include "qemu/module.h"
37 #include "qemu/option.h"
38 #include "qapi/qmp/qdict.h"
39 #include "qapi/qobject-input-visitor.h"
40 #include "qapi/qapi-visit-block-core.h"
41 #include "qemu/bswap.h"
42 #include "qemu/bitmap.h"
43 #include "migration/blocker.h"
44 #include "parallels.h"
46 /**************************************************************/
48 #define HEADER_MAGIC "WithoutFreeSpace"
49 #define HEADER_MAGIC2 "WithouFreSpacExt"
50 #define HEADER_VERSION 2
51 #define HEADER_INUSE_MAGIC (0x746F6E59)
52 #define MAX_PARALLELS_IMAGE_FACTOR (1ull << 32)
54 static QEnumLookup prealloc_mode_lookup = {
55 .array = (const char *const[]) {
59 .size = PRL_PREALLOC_MODE__MAX
62 #define PARALLELS_OPT_PREALLOC_MODE "prealloc-mode"
63 #define PARALLELS_OPT_PREALLOC_SIZE "prealloc-size"
65 static QemuOptsList parallels_runtime_opts = {
67 .head = QTAILQ_HEAD_INITIALIZER(parallels_runtime_opts.head),
70 .name = PARALLELS_OPT_PREALLOC_SIZE,
71 .type = QEMU_OPT_SIZE,
72 .help = "Preallocation size on image expansion",
73 .def_value_str = "128M",
76 .name = PARALLELS_OPT_PREALLOC_MODE,
77 .type = QEMU_OPT_STRING,
78 .help = "Preallocation mode on image expansion "
79 "(allowed values: falloc, truncate)",
80 .def_value_str = "falloc",
82 { /* end of list */ },
86 static QemuOptsList parallels_create_opts = {
87 .name = "parallels-create-opts",
88 .head = QTAILQ_HEAD_INITIALIZER(parallels_create_opts.head),
91 .name = BLOCK_OPT_SIZE,
92 .type = QEMU_OPT_SIZE,
93 .help = "Virtual disk size",
96 .name = BLOCK_OPT_CLUSTER_SIZE,
97 .type = QEMU_OPT_SIZE,
98 .help = "Parallels image cluster size",
99 .def_value_str = stringify(DEFAULT_CLUSTER_SIZE),
101 { /* end of list */ }
106 static int64_t bat2sect(BDRVParallelsState *s, uint32_t idx)
108 return (uint64_t)le32_to_cpu(s->bat_bitmap[idx]) * s->off_multiplier;
111 static uint32_t bat_entry_off(uint32_t idx)
113 return sizeof(ParallelsHeader) + sizeof(uint32_t) * idx;
116 static int64_t seek_to_sector(BDRVParallelsState *s, int64_t sector_num)
118 uint32_t index, offset;
120 index = sector_num / s->tracks;
121 offset = sector_num % s->tracks;
124 if ((index >= s->bat_size) || (s->bat_bitmap[index] == 0)) {
127 return bat2sect(s, index) + offset;
130 static int cluster_remainder(BDRVParallelsState *s, int64_t sector_num,
133 int ret = s->tracks - sector_num % s->tracks;
134 return MIN(nb_sectors, ret);
137 static int64_t block_status(BDRVParallelsState *s, int64_t sector_num,
138 int nb_sectors, int *pnum)
140 int64_t start_off = -2, prev_end_off = -2;
143 while (nb_sectors > 0 || start_off == -2) {
144 int64_t offset = seek_to_sector(s, sector_num);
147 if (start_off == -2) {
149 prev_end_off = offset;
150 } else if (offset != prev_end_off) {
154 to_end = cluster_remainder(s, sector_num, nb_sectors);
155 nb_sectors -= to_end;
156 sector_num += to_end;
160 prev_end_off += to_end;
166 static int64_t allocate_clusters(BlockDriverState *bs, int64_t sector_num,
167 int nb_sectors, int *pnum)
170 BDRVParallelsState *s = bs->opaque;
171 int64_t pos, space, idx, to_allocate, i, len;
173 pos = block_status(s, sector_num, nb_sectors, pnum);
178 idx = sector_num / s->tracks;
179 to_allocate = DIV_ROUND_UP(sector_num + *pnum, s->tracks) - idx;
181 /* This function is called only by parallels_co_writev(), which will never
182 * pass a sector_num at or beyond the end of the image (because the block
183 * layer never passes such a sector_num to that function). Therefore, idx
184 * is always below s->bat_size.
185 * block_status() will limit *pnum so that sector_num + *pnum will not
186 * exceed the image end. Therefore, idx + to_allocate cannot exceed
188 * Note that s->bat_size is an unsigned int, therefore idx + to_allocate
189 * will always fit into a uint32_t. */
190 assert(idx < s->bat_size && idx + to_allocate <= s->bat_size);
192 space = to_allocate * s->tracks;
193 len = bdrv_getlength(bs->file->bs);
197 if (s->data_end + space > (len >> BDRV_SECTOR_BITS)) {
198 space += s->prealloc_size;
199 if (s->prealloc_mode == PRL_PREALLOC_MODE_FALLOCATE) {
200 ret = bdrv_pwrite_zeroes(bs->file,
201 s->data_end << BDRV_SECTOR_BITS,
202 space << BDRV_SECTOR_BITS, 0);
204 ret = bdrv_truncate(bs->file,
205 (s->data_end + space) << BDRV_SECTOR_BITS,
206 false, PREALLOC_MODE_OFF, NULL);
213 /* Try to read from backing to fill empty clusters
214 * FIXME: 1. previous write_zeroes may be redundant
215 * 2. most of data we read from backing will be rewritten by
216 * parallels_co_writev. On aligned-to-cluster write we do not need
218 * 3. it would be good to combine write of data from backing and new
219 * data into one write call */
221 int64_t nb_cow_sectors = to_allocate * s->tracks;
222 int64_t nb_cow_bytes = nb_cow_sectors << BDRV_SECTOR_BITS;
223 void *buf = qemu_blockalign(bs, nb_cow_bytes);
225 ret = bdrv_co_pread(bs->backing, idx * s->tracks * BDRV_SECTOR_SIZE,
226 nb_cow_bytes, buf, 0);
232 ret = bdrv_co_pwritev(bs->file, s->data_end * BDRV_SECTOR_SIZE,
233 nb_cow_bytes, buf, 0);
240 for (i = 0; i < to_allocate; i++) {
241 s->bat_bitmap[idx + i] = cpu_to_le32(s->data_end / s->off_multiplier);
242 s->data_end += s->tracks;
243 bitmap_set(s->bat_dirty_bmap,
244 bat_entry_off(idx + i) / s->bat_dirty_block, 1);
247 return bat2sect(s, idx) + sector_num % s->tracks;
251 static coroutine_fn int parallels_co_flush_to_os(BlockDriverState *bs)
253 BDRVParallelsState *s = bs->opaque;
254 unsigned long size = DIV_ROUND_UP(s->header_size, s->bat_dirty_block);
257 qemu_co_mutex_lock(&s->lock);
259 bit = find_first_bit(s->bat_dirty_bmap, size);
261 uint32_t off = bit * s->bat_dirty_block;
262 uint32_t to_write = s->bat_dirty_block;
265 if (off + to_write > s->header_size) {
266 to_write = s->header_size - off;
268 ret = bdrv_pwrite(bs->file, off, (uint8_t *)s->header + off,
271 qemu_co_mutex_unlock(&s->lock);
274 bit = find_next_bit(s->bat_dirty_bmap, size, bit + 1);
276 bitmap_zero(s->bat_dirty_bmap, size);
278 qemu_co_mutex_unlock(&s->lock);
283 static int coroutine_fn parallels_co_block_status(BlockDriverState *bs,
289 BlockDriverState **file)
291 BDRVParallelsState *s = bs->opaque;
294 assert(QEMU_IS_ALIGNED(offset | bytes, BDRV_SECTOR_SIZE));
295 qemu_co_mutex_lock(&s->lock);
296 offset = block_status(s, offset >> BDRV_SECTOR_BITS,
297 bytes >> BDRV_SECTOR_BITS, &count);
298 qemu_co_mutex_unlock(&s->lock);
300 *pnum = count * BDRV_SECTOR_SIZE;
305 *map = offset * BDRV_SECTOR_SIZE;
306 *file = bs->file->bs;
307 return BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID;
310 static coroutine_fn int parallels_co_writev(BlockDriverState *bs,
311 int64_t sector_num, int nb_sectors,
312 QEMUIOVector *qiov, int flags)
314 BDRVParallelsState *s = bs->opaque;
315 uint64_t bytes_done = 0;
316 QEMUIOVector hd_qiov;
320 qemu_iovec_init(&hd_qiov, qiov->niov);
322 while (nb_sectors > 0) {
326 qemu_co_mutex_lock(&s->lock);
327 position = allocate_clusters(bs, sector_num, nb_sectors, &n);
328 qemu_co_mutex_unlock(&s->lock);
334 nbytes = n << BDRV_SECTOR_BITS;
336 qemu_iovec_reset(&hd_qiov);
337 qemu_iovec_concat(&hd_qiov, qiov, bytes_done, nbytes);
339 ret = bdrv_co_pwritev(bs->file, position * BDRV_SECTOR_SIZE, nbytes,
347 bytes_done += nbytes;
350 qemu_iovec_destroy(&hd_qiov);
354 static coroutine_fn int parallels_co_readv(BlockDriverState *bs,
355 int64_t sector_num, int nb_sectors, QEMUIOVector *qiov)
357 BDRVParallelsState *s = bs->opaque;
358 uint64_t bytes_done = 0;
359 QEMUIOVector hd_qiov;
362 qemu_iovec_init(&hd_qiov, qiov->niov);
364 while (nb_sectors > 0) {
368 qemu_co_mutex_lock(&s->lock);
369 position = block_status(s, sector_num, nb_sectors, &n);
370 qemu_co_mutex_unlock(&s->lock);
372 nbytes = n << BDRV_SECTOR_BITS;
374 qemu_iovec_reset(&hd_qiov);
375 qemu_iovec_concat(&hd_qiov, qiov, bytes_done, nbytes);
379 ret = bdrv_co_preadv(bs->backing, sector_num * BDRV_SECTOR_SIZE,
380 nbytes, &hd_qiov, 0);
385 qemu_iovec_memset(&hd_qiov, 0, 0, nbytes);
388 ret = bdrv_co_preadv(bs->file, position * BDRV_SECTOR_SIZE, nbytes,
397 bytes_done += nbytes;
400 qemu_iovec_destroy(&hd_qiov);
405 static int coroutine_fn parallels_co_check(BlockDriverState *bs,
406 BdrvCheckResult *res,
409 BDRVParallelsState *s = bs->opaque;
410 int64_t size, prev_off, high_off;
413 bool flush_bat = false;
414 int cluster_size = s->tracks << BDRV_SECTOR_BITS;
416 size = bdrv_getlength(bs->file->bs);
422 qemu_co_mutex_lock(&s->lock);
423 if (s->header_unclean) {
424 fprintf(stderr, "%s image was not closed correctly\n",
425 fix & BDRV_FIX_ERRORS ? "Repairing" : "ERROR");
427 if (fix & BDRV_FIX_ERRORS) {
428 /* parallels_close will do the job right */
429 res->corruptions_fixed++;
430 s->header_unclean = false;
434 res->bfi.total_clusters = s->bat_size;
435 res->bfi.compressed_clusters = 0; /* compression is not supported */
439 for (i = 0; i < s->bat_size; i++) {
440 int64_t off = bat2sect(s, i) << BDRV_SECTOR_BITS;
446 /* cluster outside the image */
448 fprintf(stderr, "%s cluster %u is outside image\n",
449 fix & BDRV_FIX_ERRORS ? "Repairing" : "ERROR", i);
451 if (fix & BDRV_FIX_ERRORS) {
453 s->bat_bitmap[i] = 0;
454 res->corruptions_fixed++;
460 res->bfi.allocated_clusters++;
461 if (off > high_off) {
465 if (prev_off != 0 && (prev_off + cluster_size) != off) {
466 res->bfi.fragmented_clusters++;
473 ret = bdrv_pwrite_sync(bs->file, 0, s->header, s->header_size);
480 res->image_end_offset = high_off + cluster_size;
481 if (size > res->image_end_offset) {
483 count = DIV_ROUND_UP(size - res->image_end_offset, cluster_size);
484 fprintf(stderr, "%s space leaked at the end of the image %" PRId64 "\n",
485 fix & BDRV_FIX_LEAKS ? "Repairing" : "ERROR",
486 size - res->image_end_offset);
488 if (fix & BDRV_FIX_LEAKS) {
489 Error *local_err = NULL;
492 * In order to really repair the image, we must shrink it.
493 * That means we have to pass exact=true.
495 ret = bdrv_truncate(bs->file, res->image_end_offset, true,
496 PREALLOC_MODE_OFF, &local_err);
498 error_report_err(local_err);
502 res->leaks_fixed += count;
507 qemu_co_mutex_unlock(&s->lock);
512 static int coroutine_fn parallels_co_create(BlockdevCreateOptions* opts,
515 BlockdevCreateOptionsParallels *parallels_opts;
516 BlockDriverState *bs;
518 int64_t total_size, cl_size;
519 uint32_t bat_entries, bat_sectors;
520 ParallelsHeader header;
521 uint8_t tmp[BDRV_SECTOR_SIZE];
524 assert(opts->driver == BLOCKDEV_DRIVER_PARALLELS);
525 parallels_opts = &opts->u.parallels;
528 total_size = parallels_opts->size;
530 if (parallels_opts->has_cluster_size) {
531 cl_size = parallels_opts->cluster_size;
533 cl_size = DEFAULT_CLUSTER_SIZE;
536 /* XXX What is the real limit here? This is an insanely large maximum. */
537 if (cl_size >= INT64_MAX / MAX_PARALLELS_IMAGE_FACTOR) {
538 error_setg(errp, "Cluster size is too large");
541 if (total_size >= MAX_PARALLELS_IMAGE_FACTOR * cl_size) {
542 error_setg(errp, "Image size is too large for this cluster size");
546 if (!QEMU_IS_ALIGNED(total_size, BDRV_SECTOR_SIZE)) {
547 error_setg(errp, "Image size must be a multiple of 512 bytes");
551 if (!QEMU_IS_ALIGNED(cl_size, BDRV_SECTOR_SIZE)) {
552 error_setg(errp, "Cluster size must be a multiple of 512 bytes");
556 /* Create BlockBackend to write to the image */
557 bs = bdrv_open_blockdev_ref(parallels_opts->file, errp);
562 blk = blk_new(bdrv_get_aio_context(bs),
563 BLK_PERM_WRITE | BLK_PERM_RESIZE, BLK_PERM_ALL);
564 ret = blk_insert_bs(blk, bs, errp);
568 blk_set_allow_write_beyond_eof(blk, true);
570 /* Create image format */
571 bat_entries = DIV_ROUND_UP(total_size, cl_size);
572 bat_sectors = DIV_ROUND_UP(bat_entry_off(bat_entries), cl_size);
573 bat_sectors = (bat_sectors * cl_size) >> BDRV_SECTOR_BITS;
575 memset(&header, 0, sizeof(header));
576 memcpy(header.magic, HEADER_MAGIC2, sizeof(header.magic));
577 header.version = cpu_to_le32(HEADER_VERSION);
578 /* don't care much about geometry, it is not used on image level */
579 header.heads = cpu_to_le32(HEADS_NUMBER);
580 header.cylinders = cpu_to_le32(total_size / BDRV_SECTOR_SIZE
581 / HEADS_NUMBER / SEC_IN_CYL);
582 header.tracks = cpu_to_le32(cl_size >> BDRV_SECTOR_BITS);
583 header.bat_entries = cpu_to_le32(bat_entries);
584 header.nb_sectors = cpu_to_le64(DIV_ROUND_UP(total_size, BDRV_SECTOR_SIZE));
585 header.data_off = cpu_to_le32(bat_sectors);
587 /* write all the data */
588 memset(tmp, 0, sizeof(tmp));
589 memcpy(tmp, &header, sizeof(header));
591 ret = blk_pwrite(blk, 0, tmp, BDRV_SECTOR_SIZE, 0);
595 ret = blk_pwrite_zeroes(blk, BDRV_SECTOR_SIZE,
596 (bat_sectors - 1) << BDRV_SECTOR_BITS, 0);
608 error_setg_errno(errp, -ret, "Failed to create Parallels image");
612 static int coroutine_fn parallels_co_create_opts(BlockDriver *drv,
613 const char *filename,
617 BlockdevCreateOptions *create_options = NULL;
618 Error *local_err = NULL;
619 BlockDriverState *bs = NULL;
624 static const QDictRenames opt_renames[] = {
625 { BLOCK_OPT_CLUSTER_SIZE, "cluster-size" },
629 /* Parse options and convert legacy syntax */
630 qdict = qemu_opts_to_qdict_filtered(opts, NULL, ¶llels_create_opts,
633 if (!qdict_rename_keys(qdict, opt_renames, errp)) {
638 /* Create and open the file (protocol layer) */
639 ret = bdrv_create_file(filename, opts, &local_err);
641 error_propagate(errp, local_err);
645 bs = bdrv_open(filename, NULL, NULL,
646 BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL, errp);
652 /* Now get the QAPI type BlockdevCreateOptions */
653 qdict_put_str(qdict, "driver", "parallels");
654 qdict_put_str(qdict, "file", bs->node_name);
656 v = qobject_input_visitor_new_flat_confused(qdict, errp);
662 visit_type_BlockdevCreateOptions(v, NULL, &create_options, &local_err);
666 error_propagate(errp, local_err);
671 /* Silently round up sizes */
672 create_options->u.parallels.size =
673 ROUND_UP(create_options->u.parallels.size, BDRV_SECTOR_SIZE);
674 create_options->u.parallels.cluster_size =
675 ROUND_UP(create_options->u.parallels.cluster_size, BDRV_SECTOR_SIZE);
677 /* Create the Parallels image (format layer) */
678 ret = parallels_co_create(create_options, errp);
685 qobject_unref(qdict);
687 qapi_free_BlockdevCreateOptions(create_options);
692 static int parallels_probe(const uint8_t *buf, int buf_size,
693 const char *filename)
695 const ParallelsHeader *ph = (const void *)buf;
697 if (buf_size < sizeof(ParallelsHeader)) {
701 if ((!memcmp(ph->magic, HEADER_MAGIC, 16) ||
702 !memcmp(ph->magic, HEADER_MAGIC2, 16)) &&
703 (le32_to_cpu(ph->version) == HEADER_VERSION)) {
710 static int parallels_update_header(BlockDriverState *bs)
712 BDRVParallelsState *s = bs->opaque;
713 unsigned size = MAX(bdrv_opt_mem_align(bs->file->bs),
714 sizeof(ParallelsHeader));
716 if (size > s->header_size) {
717 size = s->header_size;
719 return bdrv_pwrite_sync(bs->file, 0, s->header, size);
722 static int parallels_open(BlockDriverState *bs, QDict *options, int flags,
725 BDRVParallelsState *s = bs->opaque;
728 QemuOpts *opts = NULL;
729 Error *local_err = NULL;
732 bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file,
738 ret = bdrv_pread(bs->file, 0, &ph, sizeof(ph));
743 bs->total_sectors = le64_to_cpu(ph.nb_sectors);
745 if (le32_to_cpu(ph.version) != HEADER_VERSION) {
748 if (!memcmp(ph.magic, HEADER_MAGIC, 16)) {
749 s->off_multiplier = 1;
750 bs->total_sectors = 0xffffffff & bs->total_sectors;
751 } else if (!memcmp(ph.magic, HEADER_MAGIC2, 16)) {
752 s->off_multiplier = le32_to_cpu(ph.tracks);
757 s->tracks = le32_to_cpu(ph.tracks);
758 if (s->tracks == 0) {
759 error_setg(errp, "Invalid image: Zero sectors per track");
763 if (s->tracks > INT32_MAX/513) {
764 error_setg(errp, "Invalid image: Too big cluster");
769 s->bat_size = le32_to_cpu(ph.bat_entries);
770 if (s->bat_size > INT_MAX / sizeof(uint32_t)) {
771 error_setg(errp, "Catalog too large");
776 size = bat_entry_off(s->bat_size);
777 s->header_size = ROUND_UP(size, bdrv_opt_mem_align(bs->file->bs));
778 s->header = qemu_try_blockalign(bs->file->bs, s->header_size);
779 if (s->header == NULL) {
783 s->data_end = le32_to_cpu(ph.data_off);
784 if (s->data_end == 0) {
785 s->data_end = ROUND_UP(bat_entry_off(s->bat_size), BDRV_SECTOR_SIZE);
787 if (s->data_end < s->header_size) {
788 /* there is not enough unused space to fit to block align between BAT
789 and actual data. We can't avoid read-modify-write... */
790 s->header_size = size;
793 ret = bdrv_pread(bs->file, 0, s->header, s->header_size);
797 s->bat_bitmap = (uint32_t *)(s->header + 1);
799 for (i = 0; i < s->bat_size; i++) {
800 int64_t off = bat2sect(s, i);
801 if (off >= s->data_end) {
802 s->data_end = off + s->tracks;
806 if (le32_to_cpu(ph.inuse) == HEADER_INUSE_MAGIC) {
807 /* Image was not closed correctly. The check is mandatory */
808 s->header_unclean = true;
809 if ((flags & BDRV_O_RDWR) && !(flags & BDRV_O_CHECK)) {
810 error_setg(errp, "parallels: Image was not closed correctly; "
811 "cannot be opened read/write");
817 opts = qemu_opts_create(¶llels_runtime_opts, NULL, 0, &local_err);
818 if (local_err != NULL) {
822 qemu_opts_absorb_qdict(opts, options, &local_err);
823 if (local_err != NULL) {
828 qemu_opt_get_size_del(opts, PARALLELS_OPT_PREALLOC_SIZE, 0);
829 s->prealloc_size = MAX(s->tracks, s->prealloc_size >> BDRV_SECTOR_BITS);
830 buf = qemu_opt_get_del(opts, PARALLELS_OPT_PREALLOC_MODE);
831 s->prealloc_mode = qapi_enum_parse(&prealloc_mode_lookup, buf,
832 PRL_PREALLOC_MODE_FALLOCATE,
835 if (local_err != NULL) {
839 if (!bdrv_has_zero_init_truncate(bs->file->bs)) {
840 s->prealloc_mode = PRL_PREALLOC_MODE_FALLOCATE;
843 if ((flags & BDRV_O_RDWR) && !(flags & BDRV_O_INACTIVE)) {
844 s->header->inuse = cpu_to_le32(HEADER_INUSE_MAGIC);
845 ret = parallels_update_header(bs);
851 s->bat_dirty_block = 4 * qemu_real_host_page_size;
853 bitmap_new(DIV_ROUND_UP(s->header_size, s->bat_dirty_block));
855 /* Disable migration until bdrv_invalidate_cache method is added */
856 error_setg(&s->migration_blocker, "The Parallels format used by node '%s' "
857 "does not support live migration",
858 bdrv_get_device_or_node_name(bs));
859 ret = migrate_add_blocker(s->migration_blocker, &local_err);
861 error_propagate(errp, local_err);
862 error_free(s->migration_blocker);
865 qemu_co_mutex_init(&s->lock);
869 error_setg(errp, "Image not in Parallels format");
872 qemu_vfree(s->header);
876 error_propagate(errp, local_err);
882 static void parallels_close(BlockDriverState *bs)
884 BDRVParallelsState *s = bs->opaque;
886 if ((bs->open_flags & BDRV_O_RDWR) && !(bs->open_flags & BDRV_O_INACTIVE)) {
887 s->header->inuse = 0;
888 parallels_update_header(bs);
890 /* errors are ignored, so we might as well pass exact=true */
891 bdrv_truncate(bs->file, s->data_end << BDRV_SECTOR_BITS, true,
892 PREALLOC_MODE_OFF, NULL);
895 g_free(s->bat_dirty_bmap);
896 qemu_vfree(s->header);
898 migrate_del_blocker(s->migration_blocker);
899 error_free(s->migration_blocker);
902 static BlockDriver bdrv_parallels = {
903 .format_name = "parallels",
904 .instance_size = sizeof(BDRVParallelsState),
905 .bdrv_probe = parallels_probe,
906 .bdrv_open = parallels_open,
907 .bdrv_close = parallels_close,
908 .bdrv_child_perm = bdrv_format_default_perms,
909 .bdrv_co_block_status = parallels_co_block_status,
910 .bdrv_has_zero_init = bdrv_has_zero_init_1,
911 .bdrv_co_flush_to_os = parallels_co_flush_to_os,
912 .bdrv_co_readv = parallels_co_readv,
913 .bdrv_co_writev = parallels_co_writev,
914 .supports_backing = true,
915 .bdrv_co_create = parallels_co_create,
916 .bdrv_co_create_opts = parallels_co_create_opts,
917 .bdrv_co_check = parallels_co_check,
918 .create_opts = ¶llels_create_opts,
921 static void bdrv_parallels_init(void)
923 bdrv_register(&bdrv_parallels);
926 block_init(bdrv_parallels_init);