2 * Block driver for the VMDK format
4 * Copyright (c) 2004 Fabrice Bellard
5 * Copyright (c) 2005 Filip Navara
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:
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
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
26 #include "qemu-common.h"
27 #include "block/block_int.h"
28 #include "qemu/module.h"
29 #include "migration/migration.h"
32 #define VMDK3_MAGIC (('C' << 24) | ('O' << 16) | ('W' << 8) | 'D')
33 #define VMDK4_MAGIC (('K' << 24) | ('D' << 16) | ('M' << 8) | 'V')
34 #define VMDK4_COMPRESSION_DEFLATE 1
35 #define VMDK4_FLAG_NL_DETECT (1 << 0)
36 #define VMDK4_FLAG_RGD (1 << 1)
37 /* Zeroed-grain enable bit */
38 #define VMDK4_FLAG_ZERO_GRAIN (1 << 2)
39 #define VMDK4_FLAG_COMPRESS (1 << 16)
40 #define VMDK4_FLAG_MARKER (1 << 17)
41 #define VMDK4_GD_AT_END 0xffffffffffffffffULL
43 #define VMDK_GTE_ZEROED 0x1
45 /* VMDK internal error codes */
47 #define VMDK_ERROR (-1)
48 /* Cluster not allocated */
49 #define VMDK_UNALLOC (-2)
50 #define VMDK_ZEROED (-3)
52 #define BLOCK_OPT_ZEROED_GRAIN "zeroed_grain"
57 uint32_t disk_sectors;
59 uint32_t l1dir_offset;
61 uint32_t file_sectors;
64 uint32_t sectors_per_track;
65 } QEMU_PACKED VMDK3Header;
74 /* Number of GrainTableEntries per GrainTable */
75 uint32_t num_gtes_per_gt;
78 uint64_t grain_offset;
81 uint16_t compressAlgorithm;
82 } QEMU_PACKED VMDK4Header;
84 #define L2_CACHE_SIZE 16
86 typedef struct VmdkExtent {
87 BlockDriverState *file;
95 int64_t flat_start_offset;
96 int64_t l1_table_offset;
97 int64_t l1_backup_table_offset;
99 uint32_t *l1_backup_table;
100 unsigned int l1_size;
101 uint32_t l1_entry_sectors;
103 unsigned int l2_size;
105 uint32_t l2_cache_offsets[L2_CACHE_SIZE];
106 uint32_t l2_cache_counts[L2_CACHE_SIZE];
108 int64_t cluster_sectors;
112 typedef struct BDRVVmdkState {
114 uint64_t desc_offset;
120 /* Extent array with num_extents entries, ascend ordered by address */
122 Error *migration_blocker;
126 typedef struct VmdkMetaData {
128 unsigned int l1_index;
129 unsigned int l2_index;
130 unsigned int l2_offset;
132 uint32_t *l2_cache_entry;
135 typedef struct VmdkGrainMarker {
139 } QEMU_PACKED VmdkGrainMarker;
142 MARKER_END_OF_STREAM = 0,
143 MARKER_GRAIN_TABLE = 1,
144 MARKER_GRAIN_DIRECTORY = 2,
148 static int vmdk_probe(const uint8_t *buf, int buf_size, const char *filename)
155 magic = be32_to_cpu(*(uint32_t *)buf);
156 if (magic == VMDK3_MAGIC ||
157 magic == VMDK4_MAGIC) {
160 const char *p = (const char *)buf;
161 const char *end = p + buf_size;
164 /* skip comment line */
165 while (p < end && *p != '\n') {
172 while (p < end && *p == ' ') {
175 /* skip '\r' if windows line endings used. */
176 if (p < end && *p == '\r') {
179 /* only accept blank lines before 'version=' line */
180 if (p == end || *p != '\n') {
186 if (end - p >= strlen("version=X\n")) {
187 if (strncmp("version=1\n", p, strlen("version=1\n")) == 0 ||
188 strncmp("version=2\n", p, strlen("version=2\n")) == 0) {
192 if (end - p >= strlen("version=X\r\n")) {
193 if (strncmp("version=1\r\n", p, strlen("version=1\r\n")) == 0 ||
194 strncmp("version=2\r\n", p, strlen("version=2\r\n")) == 0) {
204 #define SECTOR_SIZE 512
205 #define DESC_SIZE (20 * SECTOR_SIZE) /* 20 sectors of 512 bytes each */
206 #define BUF_SIZE 4096
207 #define HEADER_SIZE 512 /* first sector of 512 bytes */
209 static void vmdk_free_extents(BlockDriverState *bs)
212 BDRVVmdkState *s = bs->opaque;
215 for (i = 0; i < s->num_extents; i++) {
219 g_free(e->l1_backup_table);
221 if (e->file != bs->file) {
228 static void vmdk_free_last_extent(BlockDriverState *bs)
230 BDRVVmdkState *s = bs->opaque;
232 if (s->num_extents == 0) {
236 s->extents = g_realloc(s->extents, s->num_extents * sizeof(VmdkExtent));
239 static uint32_t vmdk_read_cid(BlockDriverState *bs, int parent)
241 char desc[DESC_SIZE];
242 uint32_t cid = 0xffffffff;
243 const char *p_name, *cid_str;
245 BDRVVmdkState *s = bs->opaque;
248 ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE);
254 cid_str = "parentCID";
255 cid_str_size = sizeof("parentCID");
258 cid_str_size = sizeof("CID");
261 desc[DESC_SIZE - 1] = '\0';
262 p_name = strstr(desc, cid_str);
263 if (p_name != NULL) {
264 p_name += cid_str_size;
265 sscanf(p_name, "%" SCNx32, &cid);
271 static int vmdk_write_cid(BlockDriverState *bs, uint32_t cid)
273 char desc[DESC_SIZE], tmp_desc[DESC_SIZE];
274 char *p_name, *tmp_str;
275 BDRVVmdkState *s = bs->opaque;
278 ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE);
283 desc[DESC_SIZE - 1] = '\0';
284 tmp_str = strstr(desc, "parentCID");
285 if (tmp_str == NULL) {
289 pstrcpy(tmp_desc, sizeof(tmp_desc), tmp_str);
290 p_name = strstr(desc, "CID");
291 if (p_name != NULL) {
292 p_name += sizeof("CID");
293 snprintf(p_name, sizeof(desc) - (p_name - desc), "%" PRIx32 "\n", cid);
294 pstrcat(desc, sizeof(desc), tmp_desc);
297 ret = bdrv_pwrite_sync(bs->file, s->desc_offset, desc, DESC_SIZE);
305 static int vmdk_is_cid_valid(BlockDriverState *bs)
307 BDRVVmdkState *s = bs->opaque;
308 BlockDriverState *p_bs = bs->backing_hd;
311 if (!s->cid_checked && p_bs) {
312 cur_pcid = vmdk_read_cid(p_bs, 0);
313 if (s->parent_cid != cur_pcid) {
318 s->cid_checked = true;
323 /* Queue extents, if any, for reopen() */
324 static int vmdk_reopen_prepare(BDRVReopenState *state,
325 BlockReopenQueue *queue, Error **errp)
332 assert(state != NULL);
333 assert(state->bs != NULL);
336 error_setg(errp, "No reopen queue for VMDK extents");
340 s = state->bs->opaque;
344 for (i = 0; i < s->num_extents; i++) {
346 if (e->file != state->bs->file) {
347 bdrv_reopen_queue(queue, e->file, state->flags);
356 static int vmdk_parent_open(BlockDriverState *bs)
359 char desc[DESC_SIZE + 1];
360 BDRVVmdkState *s = bs->opaque;
363 desc[DESC_SIZE] = '\0';
364 ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE);
369 p_name = strstr(desc, "parentFileNameHint");
370 if (p_name != NULL) {
373 p_name += sizeof("parentFileNameHint") + 1;
374 end_name = strchr(p_name, '\"');
375 if (end_name == NULL) {
378 if ((end_name - p_name) > sizeof(bs->backing_file) - 1) {
382 pstrcpy(bs->backing_file, end_name - p_name + 1, p_name);
388 /* Create and append extent to the extent array. Return the added VmdkExtent
389 * address. return NULL if allocation failed. */
390 static int vmdk_add_extent(BlockDriverState *bs,
391 BlockDriverState *file, bool flat, int64_t sectors,
392 int64_t l1_offset, int64_t l1_backup_offset,
394 int l2_size, uint64_t cluster_sectors,
395 VmdkExtent **new_extent,
399 BDRVVmdkState *s = bs->opaque;
401 if (cluster_sectors > 0x200000) {
402 /* 0x200000 * 512Bytes = 1GB for one cluster is unrealistic */
403 error_setg(errp, "Invalid granularity, image may be corrupt");
406 if (l1_size > 512 * 1024 * 1024) {
407 /* Although with big capacity and small l1_entry_sectors, we can get a
408 * big l1_size, we don't want unbounded value to allocate the table.
409 * Limit it to 512M, which is 16PB for default cluster and L2 table
411 error_setg(errp, "L1 size too big");
415 s->extents = g_realloc(s->extents,
416 (s->num_extents + 1) * sizeof(VmdkExtent));
417 extent = &s->extents[s->num_extents];
420 memset(extent, 0, sizeof(VmdkExtent));
423 extent->sectors = sectors;
424 extent->l1_table_offset = l1_offset;
425 extent->l1_backup_table_offset = l1_backup_offset;
426 extent->l1_size = l1_size;
427 extent->l1_entry_sectors = l2_size * cluster_sectors;
428 extent->l2_size = l2_size;
429 extent->cluster_sectors = flat ? sectors : cluster_sectors;
431 if (s->num_extents > 1) {
432 extent->end_sector = (*(extent - 1)).end_sector + extent->sectors;
434 extent->end_sector = extent->sectors;
436 bs->total_sectors = extent->end_sector;
438 *new_extent = extent;
443 static int vmdk_init_tables(BlockDriverState *bs, VmdkExtent *extent,
449 /* read the L1 table */
450 l1_size = extent->l1_size * sizeof(uint32_t);
451 extent->l1_table = g_malloc(l1_size);
452 ret = bdrv_pread(extent->file,
453 extent->l1_table_offset,
457 error_setg_errno(errp, -ret,
458 "Could not read l1 table from extent '%s'",
459 extent->file->filename);
462 for (i = 0; i < extent->l1_size; i++) {
463 le32_to_cpus(&extent->l1_table[i]);
466 if (extent->l1_backup_table_offset) {
467 extent->l1_backup_table = g_malloc(l1_size);
468 ret = bdrv_pread(extent->file,
469 extent->l1_backup_table_offset,
470 extent->l1_backup_table,
473 error_setg_errno(errp, -ret,
474 "Could not read l1 backup table from extent '%s'",
475 extent->file->filename);
478 for (i = 0; i < extent->l1_size; i++) {
479 le32_to_cpus(&extent->l1_backup_table[i]);
484 g_malloc(extent->l2_size * L2_CACHE_SIZE * sizeof(uint32_t));
487 g_free(extent->l1_backup_table);
489 g_free(extent->l1_table);
493 static int vmdk_open_vmfs_sparse(BlockDriverState *bs,
494 BlockDriverState *file,
495 int flags, Error **errp)
502 ret = bdrv_pread(file, sizeof(magic), &header, sizeof(header));
504 error_setg_errno(errp, -ret,
505 "Could not read header from file '%s'",
509 ret = vmdk_add_extent(bs, file, false,
510 le32_to_cpu(header.disk_sectors),
511 le32_to_cpu(header.l1dir_offset) << 9,
513 le32_to_cpu(header.l1dir_size),
515 le32_to_cpu(header.granularity),
521 ret = vmdk_init_tables(bs, extent, errp);
523 /* free extent allocated by vmdk_add_extent */
524 vmdk_free_last_extent(bs);
529 static int vmdk_open_desc_file(BlockDriverState *bs, int flags, char *buf,
532 static char *vmdk_read_desc(BlockDriverState *file, uint64_t desc_offset,
539 size = bdrv_getlength(file);
541 error_setg_errno(errp, -size, "Could not access file");
545 size = MIN(size, 1 << 20); /* avoid unbounded allocation */
546 buf = g_malloc0(size + 1);
548 ret = bdrv_pread(file, desc_offset, buf, size);
550 error_setg_errno(errp, -ret, "Could not read from file");
558 static int vmdk_open_vmdk4(BlockDriverState *bs,
559 BlockDriverState *file,
560 int flags, Error **errp)
564 uint32_t l1_size, l1_entry_sectors;
567 BDRVVmdkState *s = bs->opaque;
568 int64_t l1_backup_offset = 0;
570 ret = bdrv_pread(file, sizeof(magic), &header, sizeof(header));
572 error_setg_errno(errp, -ret,
573 "Could not read header from file '%s'",
577 if (header.capacity == 0) {
578 uint64_t desc_offset = le64_to_cpu(header.desc_offset);
580 char *buf = vmdk_read_desc(file, desc_offset << 9, errp);
584 ret = vmdk_open_desc_file(bs, flags, buf, errp);
590 if (!s->create_type) {
591 s->create_type = g_strdup("monolithicSparse");
594 if (le64_to_cpu(header.gd_offset) == VMDK4_GD_AT_END) {
596 * The footer takes precedence over the header, so read it in. The
597 * footer starts at offset -1024 from the end: One sector for the
598 * footer, and another one for the end-of-stream marker.
605 uint8_t pad[512 - 16];
606 } QEMU_PACKED footer_marker;
610 uint8_t pad[512 - 4 - sizeof(VMDK4Header)];
616 uint8_t pad[512 - 16];
617 } QEMU_PACKED eos_marker;
618 } QEMU_PACKED footer;
620 ret = bdrv_pread(file,
621 bs->file->total_sectors * 512 - 1536,
622 &footer, sizeof(footer));
627 /* Some sanity checks for the footer */
628 if (be32_to_cpu(footer.magic) != VMDK4_MAGIC ||
629 le32_to_cpu(footer.footer_marker.size) != 0 ||
630 le32_to_cpu(footer.footer_marker.type) != MARKER_FOOTER ||
631 le64_to_cpu(footer.eos_marker.val) != 0 ||
632 le32_to_cpu(footer.eos_marker.size) != 0 ||
633 le32_to_cpu(footer.eos_marker.type) != MARKER_END_OF_STREAM)
638 header = footer.header;
641 if (le32_to_cpu(header.version) > 3) {
643 snprintf(buf, sizeof(buf), "VMDK version %" PRId32,
644 le32_to_cpu(header.version));
645 error_set(errp, QERR_UNKNOWN_BLOCK_FORMAT_FEATURE,
646 bs->device_name, "vmdk", buf);
648 } else if (le32_to_cpu(header.version) == 3 && (flags & BDRV_O_RDWR)) {
649 /* VMware KB 2064959 explains that version 3 added support for
650 * persistent changed block tracking (CBT), and backup software can
651 * read it as version=1 if it doesn't care about the changed area
652 * information. So we are safe to enable read only. */
653 error_setg(errp, "VMDK version 3 must be read only");
657 if (le32_to_cpu(header.num_gtes_per_gt) > 512) {
658 error_setg(errp, "L2 table size too big");
662 l1_entry_sectors = le32_to_cpu(header.num_gtes_per_gt)
663 * le64_to_cpu(header.granularity);
664 if (l1_entry_sectors == 0) {
667 l1_size = (le64_to_cpu(header.capacity) + l1_entry_sectors - 1)
669 if (le32_to_cpu(header.flags) & VMDK4_FLAG_RGD) {
670 l1_backup_offset = le64_to_cpu(header.rgd_offset) << 9;
672 if (bdrv_getlength(file) <
673 le64_to_cpu(header.grain_offset) * BDRV_SECTOR_SIZE) {
674 error_setg(errp, "File truncated, expecting at least %" PRId64 " bytes",
675 (int64_t)(le64_to_cpu(header.grain_offset)
676 * BDRV_SECTOR_SIZE));
680 ret = vmdk_add_extent(bs, file, false,
681 le64_to_cpu(header.capacity),
682 le64_to_cpu(header.gd_offset) << 9,
685 le32_to_cpu(header.num_gtes_per_gt),
686 le64_to_cpu(header.granularity),
693 le16_to_cpu(header.compressAlgorithm) == VMDK4_COMPRESSION_DEFLATE;
694 if (extent->compressed) {
695 g_free(s->create_type);
696 s->create_type = g_strdup("streamOptimized");
698 extent->has_marker = le32_to_cpu(header.flags) & VMDK4_FLAG_MARKER;
699 extent->version = le32_to_cpu(header.version);
700 extent->has_zero_grain = le32_to_cpu(header.flags) & VMDK4_FLAG_ZERO_GRAIN;
701 ret = vmdk_init_tables(bs, extent, errp);
703 /* free extent allocated by vmdk_add_extent */
704 vmdk_free_last_extent(bs);
709 /* find an option value out of descriptor file */
710 static int vmdk_parse_description(const char *desc, const char *opt_name,
711 char *buf, int buf_size)
713 char *opt_pos, *opt_end;
714 const char *end = desc + strlen(desc);
716 opt_pos = strstr(desc, opt_name);
720 /* Skip "=\"" following opt_name */
721 opt_pos += strlen(opt_name) + 2;
722 if (opt_pos >= end) {
726 while (opt_end < end && *opt_end != '"') {
729 if (opt_end == end || buf_size < opt_end - opt_pos + 1) {
732 pstrcpy(buf, opt_end - opt_pos + 1, opt_pos);
736 /* Open an extent file and append to bs array */
737 static int vmdk_open_sparse(BlockDriverState *bs,
738 BlockDriverState *file, int flags,
739 char *buf, Error **errp)
743 magic = ldl_be_p(buf);
746 return vmdk_open_vmfs_sparse(bs, file, flags, errp);
749 return vmdk_open_vmdk4(bs, file, flags, errp);
752 error_setg(errp, "Image not in VMDK format");
758 static int vmdk_parse_extents(const char *desc, BlockDriverState *bs,
759 const char *desc_file_path, Error **errp)
765 const char *p = desc;
768 char extent_path[PATH_MAX];
769 BlockDriverState *extent_file;
770 BDRVVmdkState *s = bs->opaque;
774 /* parse extent line:
775 * RW [size in sectors] FLAT "file-name.vmdk" OFFSET
777 * RW [size in sectors] SPARSE "file-name.vmdk"
780 ret = sscanf(p, "%10s %" SCNd64 " %10s \"%511[^\n\r\"]\" %" SCNd64,
781 access, §ors, type, fname, &flat_offset);
782 if (ret < 4 || strcmp(access, "RW")) {
784 } else if (!strcmp(type, "FLAT")) {
785 if (ret != 5 || flat_offset < 0) {
786 error_setg(errp, "Invalid extent lines: \n%s", p);
789 } else if (!strcmp(type, "VMFS")) {
793 error_setg(errp, "Invalid extent lines:\n%s", p);
796 } else if (ret != 4) {
797 error_setg(errp, "Invalid extent lines:\n%s", p);
802 (strcmp(type, "FLAT") && strcmp(type, "SPARSE") &&
803 strcmp(type, "VMFS") && strcmp(type, "VMFSSPARSE")) ||
804 (strcmp(access, "RW"))) {
808 path_combine(extent_path, sizeof(extent_path),
809 desc_file_path, fname);
811 ret = bdrv_open(&extent_file, extent_path, NULL, NULL,
812 bs->open_flags | BDRV_O_PROTOCOL, NULL, errp);
817 /* save to extents array */
818 if (!strcmp(type, "FLAT") || !strcmp(type, "VMFS")) {
821 ret = vmdk_add_extent(bs, extent_file, true, sectors,
822 0, 0, 0, 0, 0, &extent, errp);
826 extent->flat_start_offset = flat_offset << 9;
827 } else if (!strcmp(type, "SPARSE") || !strcmp(type, "VMFSSPARSE")) {
828 /* SPARSE extent and VMFSSPARSE extent are both "COWD" sparse file*/
829 char *buf = vmdk_read_desc(extent_file, 0, errp);
833 ret = vmdk_open_sparse(bs, extent_file, bs->open_flags, buf, errp);
837 bdrv_unref(extent_file);
840 extent = &s->extents[s->num_extents - 1];
842 error_setg(errp, "Unsupported extent type '%s'", type);
845 extent->type = g_strdup(type);
847 /* move to next line */
859 static int vmdk_open_desc_file(BlockDriverState *bs, int flags, char *buf,
864 BDRVVmdkState *s = bs->opaque;
866 if (vmdk_parse_description(buf, "createType", ct, sizeof(ct))) {
867 error_setg(errp, "invalid VMDK image descriptor");
871 if (strcmp(ct, "monolithicFlat") &&
872 strcmp(ct, "vmfs") &&
873 strcmp(ct, "vmfsSparse") &&
874 strcmp(ct, "twoGbMaxExtentSparse") &&
875 strcmp(ct, "twoGbMaxExtentFlat")) {
876 error_setg(errp, "Unsupported image type '%s'", ct);
880 s->create_type = g_strdup(ct);
882 ret = vmdk_parse_extents(buf, bs, bs->file->filename, errp);
887 static int vmdk_open(BlockDriverState *bs, QDict *options, int flags,
892 BDRVVmdkState *s = bs->opaque;
895 buf = vmdk_read_desc(bs->file, 0, errp);
900 magic = ldl_be_p(buf);
904 ret = vmdk_open_sparse(bs, bs->file, flags, buf, errp);
905 s->desc_offset = 0x200;
908 ret = vmdk_open_desc_file(bs, flags, buf, errp);
915 /* try to open parent images, if exist */
916 ret = vmdk_parent_open(bs);
920 s->cid = vmdk_read_cid(bs, 0);
921 s->parent_cid = vmdk_read_cid(bs, 1);
922 qemu_co_mutex_init(&s->lock);
924 /* Disable migration when VMDK images are used */
925 error_set(&s->migration_blocker,
926 QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED,
927 "vmdk", bs->device_name, "live migration");
928 migrate_add_blocker(s->migration_blocker);
934 g_free(s->create_type);
935 s->create_type = NULL;
936 vmdk_free_extents(bs);
941 static int vmdk_refresh_limits(BlockDriverState *bs)
943 BDRVVmdkState *s = bs->opaque;
946 for (i = 0; i < s->num_extents; i++) {
947 if (!s->extents[i].flat) {
948 bs->bl.write_zeroes_alignment =
949 MAX(bs->bl.write_zeroes_alignment,
950 s->extents[i].cluster_sectors);
957 static int get_whole_cluster(BlockDriverState *bs,
959 uint64_t cluster_offset,
964 uint8_t *whole_grain = NULL;
966 /* we will be here if it's first write on non-exist grain(cluster).
967 * try to read from parent image, if exist */
968 if (bs->backing_hd) {
970 qemu_blockalign(bs, extent->cluster_sectors << BDRV_SECTOR_BITS);
971 if (!vmdk_is_cid_valid(bs)) {
976 /* floor offset to cluster */
977 offset -= offset % (extent->cluster_sectors * 512);
978 ret = bdrv_read(bs->backing_hd, offset >> 9, whole_grain,
979 extent->cluster_sectors);
985 /* Write grain only into the active image */
986 ret = bdrv_write(extent->file, cluster_offset, whole_grain,
987 extent->cluster_sectors);
994 qemu_vfree(whole_grain);
998 static int vmdk_L2update(VmdkExtent *extent, VmdkMetaData *m_data)
1001 QEMU_BUILD_BUG_ON(sizeof(offset) != sizeof(m_data->offset));
1002 offset = cpu_to_le32(m_data->offset);
1003 /* update L2 table */
1004 if (bdrv_pwrite_sync(
1006 ((int64_t)m_data->l2_offset * 512)
1007 + (m_data->l2_index * sizeof(m_data->offset)),
1008 &offset, sizeof(offset)) < 0) {
1011 /* update backup L2 table */
1012 if (extent->l1_backup_table_offset != 0) {
1013 m_data->l2_offset = extent->l1_backup_table[m_data->l1_index];
1014 if (bdrv_pwrite_sync(
1016 ((int64_t)m_data->l2_offset * 512)
1017 + (m_data->l2_index * sizeof(m_data->offset)),
1018 &offset, sizeof(offset)) < 0) {
1022 if (m_data->l2_cache_entry) {
1023 *m_data->l2_cache_entry = offset;
1029 static int get_cluster_offset(BlockDriverState *bs,
1031 VmdkMetaData *m_data,
1034 uint64_t *cluster_offset)
1036 unsigned int l1_index, l2_offset, l2_index;
1037 int min_index, i, j;
1038 uint32_t min_count, *l2_table;
1039 bool zeroed = false;
1045 *cluster_offset = extent->flat_start_offset;
1049 offset -= (extent->end_sector - extent->sectors) * SECTOR_SIZE;
1050 l1_index = (offset >> 9) / extent->l1_entry_sectors;
1051 if (l1_index >= extent->l1_size) {
1054 l2_offset = extent->l1_table[l1_index];
1056 return VMDK_UNALLOC;
1058 for (i = 0; i < L2_CACHE_SIZE; i++) {
1059 if (l2_offset == extent->l2_cache_offsets[i]) {
1060 /* increment the hit count */
1061 if (++extent->l2_cache_counts[i] == 0xffffffff) {
1062 for (j = 0; j < L2_CACHE_SIZE; j++) {
1063 extent->l2_cache_counts[j] >>= 1;
1066 l2_table = extent->l2_cache + (i * extent->l2_size);
1070 /* not found: load a new entry in the least used one */
1072 min_count = 0xffffffff;
1073 for (i = 0; i < L2_CACHE_SIZE; i++) {
1074 if (extent->l2_cache_counts[i] < min_count) {
1075 min_count = extent->l2_cache_counts[i];
1079 l2_table = extent->l2_cache + (min_index * extent->l2_size);
1082 (int64_t)l2_offset * 512,
1084 extent->l2_size * sizeof(uint32_t)
1085 ) != extent->l2_size * sizeof(uint32_t)) {
1089 extent->l2_cache_offsets[min_index] = l2_offset;
1090 extent->l2_cache_counts[min_index] = 1;
1092 l2_index = ((offset >> 9) / extent->cluster_sectors) % extent->l2_size;
1093 *cluster_offset = le32_to_cpu(l2_table[l2_index]);
1097 m_data->l1_index = l1_index;
1098 m_data->l2_index = l2_index;
1099 m_data->offset = *cluster_offset;
1100 m_data->l2_offset = l2_offset;
1101 m_data->l2_cache_entry = &l2_table[l2_index];
1103 if (extent->has_zero_grain && *cluster_offset == VMDK_GTE_ZEROED) {
1107 if (!*cluster_offset || zeroed) {
1109 return zeroed ? VMDK_ZEROED : VMDK_UNALLOC;
1112 /* Avoid the L2 tables update for the images that have snapshots. */
1113 *cluster_offset = bdrv_getlength(extent->file);
1114 if (!extent->compressed) {
1117 *cluster_offset + (extent->cluster_sectors << 9)
1121 *cluster_offset >>= 9;
1122 l2_table[l2_index] = cpu_to_le32(*cluster_offset);
1124 /* First of all we write grain itself, to avoid race condition
1125 * that may to corrupt the image.
1126 * This problem may occur because of insufficient space on host disk
1127 * or inappropriate VM shutdown.
1129 if (get_whole_cluster(
1130 bs, extent, *cluster_offset, offset, allocate) == -1) {
1135 m_data->offset = *cluster_offset;
1138 *cluster_offset <<= 9;
1142 static VmdkExtent *find_extent(BDRVVmdkState *s,
1143 int64_t sector_num, VmdkExtent *start_hint)
1145 VmdkExtent *extent = start_hint;
1148 extent = &s->extents[0];
1150 while (extent < &s->extents[s->num_extents]) {
1151 if (sector_num < extent->end_sector) {
1159 static int64_t coroutine_fn vmdk_co_get_block_status(BlockDriverState *bs,
1160 int64_t sector_num, int nb_sectors, int *pnum)
1162 BDRVVmdkState *s = bs->opaque;
1163 int64_t index_in_cluster, n, ret;
1167 extent = find_extent(s, sector_num, NULL);
1171 qemu_co_mutex_lock(&s->lock);
1172 ret = get_cluster_offset(bs, extent, NULL,
1173 sector_num * 512, 0, &offset);
1174 qemu_co_mutex_unlock(&s->lock);
1184 ret = BDRV_BLOCK_ZERO;
1187 ret = BDRV_BLOCK_DATA;
1188 if (extent->file == bs->file && !extent->compressed) {
1189 ret |= BDRV_BLOCK_OFFSET_VALID | offset;
1195 index_in_cluster = sector_num % extent->cluster_sectors;
1196 n = extent->cluster_sectors - index_in_cluster;
1197 if (n > nb_sectors) {
1204 static int vmdk_write_extent(VmdkExtent *extent, int64_t cluster_offset,
1205 int64_t offset_in_cluster, const uint8_t *buf,
1206 int nb_sectors, int64_t sector_num)
1209 VmdkGrainMarker *data = NULL;
1211 const uint8_t *write_buf = buf;
1212 int write_len = nb_sectors * 512;
1214 if (extent->compressed) {
1215 if (!extent->has_marker) {
1219 buf_len = (extent->cluster_sectors << 9) * 2;
1220 data = g_malloc(buf_len + sizeof(VmdkGrainMarker));
1221 if (compress(data->data, &buf_len, buf, nb_sectors << 9) != Z_OK ||
1226 data->lba = sector_num;
1227 data->size = buf_len;
1228 write_buf = (uint8_t *)data;
1229 write_len = buf_len + sizeof(VmdkGrainMarker);
1231 ret = bdrv_pwrite(extent->file,
1232 cluster_offset + offset_in_cluster,
1235 if (ret != write_len) {
1236 ret = ret < 0 ? ret : -EIO;
1245 static int vmdk_read_extent(VmdkExtent *extent, int64_t cluster_offset,
1246 int64_t offset_in_cluster, uint8_t *buf,
1250 int cluster_bytes, buf_bytes;
1251 uint8_t *cluster_buf, *compressed_data;
1252 uint8_t *uncomp_buf;
1254 VmdkGrainMarker *marker;
1258 if (!extent->compressed) {
1259 ret = bdrv_pread(extent->file,
1260 cluster_offset + offset_in_cluster,
1261 buf, nb_sectors * 512);
1262 if (ret == nb_sectors * 512) {
1268 cluster_bytes = extent->cluster_sectors * 512;
1269 /* Read two clusters in case GrainMarker + compressed data > one cluster */
1270 buf_bytes = cluster_bytes * 2;
1271 cluster_buf = g_malloc(buf_bytes);
1272 uncomp_buf = g_malloc(cluster_bytes);
1273 ret = bdrv_pread(extent->file,
1275 cluster_buf, buf_bytes);
1279 compressed_data = cluster_buf;
1280 buf_len = cluster_bytes;
1281 data_len = cluster_bytes;
1282 if (extent->has_marker) {
1283 marker = (VmdkGrainMarker *)cluster_buf;
1284 compressed_data = marker->data;
1285 data_len = le32_to_cpu(marker->size);
1287 if (!data_len || data_len > buf_bytes) {
1291 ret = uncompress(uncomp_buf, &buf_len, compressed_data, data_len);
1297 if (offset_in_cluster < 0 ||
1298 offset_in_cluster + nb_sectors * 512 > buf_len) {
1302 memcpy(buf, uncomp_buf + offset_in_cluster, nb_sectors * 512);
1307 g_free(cluster_buf);
1311 static int vmdk_read(BlockDriverState *bs, int64_t sector_num,
1312 uint8_t *buf, int nb_sectors)
1314 BDRVVmdkState *s = bs->opaque;
1316 uint64_t n, index_in_cluster;
1317 uint64_t extent_begin_sector, extent_relative_sector_num;
1318 VmdkExtent *extent = NULL;
1319 uint64_t cluster_offset;
1321 while (nb_sectors > 0) {
1322 extent = find_extent(s, sector_num, extent);
1326 ret = get_cluster_offset(
1328 sector_num << 9, 0, &cluster_offset);
1329 extent_begin_sector = extent->end_sector - extent->sectors;
1330 extent_relative_sector_num = sector_num - extent_begin_sector;
1331 index_in_cluster = extent_relative_sector_num % extent->cluster_sectors;
1332 n = extent->cluster_sectors - index_in_cluster;
1333 if (n > nb_sectors) {
1336 if (ret != VMDK_OK) {
1337 /* if not allocated, try to read from parent image, if exist */
1338 if (bs->backing_hd && ret != VMDK_ZEROED) {
1339 if (!vmdk_is_cid_valid(bs)) {
1342 ret = bdrv_read(bs->backing_hd, sector_num, buf, n);
1347 memset(buf, 0, 512 * n);
1350 ret = vmdk_read_extent(extent,
1351 cluster_offset, index_in_cluster * 512,
1364 static coroutine_fn int vmdk_co_read(BlockDriverState *bs, int64_t sector_num,
1365 uint8_t *buf, int nb_sectors)
1368 BDRVVmdkState *s = bs->opaque;
1369 qemu_co_mutex_lock(&s->lock);
1370 ret = vmdk_read(bs, sector_num, buf, nb_sectors);
1371 qemu_co_mutex_unlock(&s->lock);
1377 * @zeroed: buf is ignored (data is zero), use zeroed_grain GTE feature
1378 * if possible, otherwise return -ENOTSUP.
1379 * @zero_dry_run: used for zeroed == true only, don't update L2 table, just try
1380 * with each cluster. By dry run we can find if the zero write
1381 * is possible without modifying image data.
1383 * Returns: error code with 0 for success.
1385 static int vmdk_write(BlockDriverState *bs, int64_t sector_num,
1386 const uint8_t *buf, int nb_sectors,
1387 bool zeroed, bool zero_dry_run)
1389 BDRVVmdkState *s = bs->opaque;
1390 VmdkExtent *extent = NULL;
1392 int64_t index_in_cluster, n;
1393 uint64_t extent_begin_sector, extent_relative_sector_num;
1394 uint64_t cluster_offset;
1395 VmdkMetaData m_data;
1397 if (sector_num > bs->total_sectors) {
1398 error_report("Wrong offset: sector_num=0x%" PRIx64
1399 " total_sectors=0x%" PRIx64 "\n",
1400 sector_num, bs->total_sectors);
1404 while (nb_sectors > 0) {
1405 extent = find_extent(s, sector_num, extent);
1409 ret = get_cluster_offset(
1413 sector_num << 9, !extent->compressed,
1415 if (extent->compressed) {
1416 if (ret == VMDK_OK) {
1417 /* Refuse write to allocated cluster for streamOptimized */
1418 error_report("Could not write to allocated cluster"
1419 " for streamOptimized");
1423 ret = get_cluster_offset(
1431 if (ret == VMDK_ERROR) {
1434 extent_begin_sector = extent->end_sector - extent->sectors;
1435 extent_relative_sector_num = sector_num - extent_begin_sector;
1436 index_in_cluster = extent_relative_sector_num % extent->cluster_sectors;
1437 n = extent->cluster_sectors - index_in_cluster;
1438 if (n > nb_sectors) {
1442 /* Do zeroed write, buf is ignored */
1443 if (extent->has_zero_grain &&
1444 index_in_cluster == 0 &&
1445 n >= extent->cluster_sectors) {
1446 n = extent->cluster_sectors;
1447 if (!zero_dry_run) {
1448 m_data.offset = VMDK_GTE_ZEROED;
1449 /* update L2 tables */
1450 if (vmdk_L2update(extent, &m_data) != VMDK_OK) {
1458 ret = vmdk_write_extent(extent,
1459 cluster_offset, index_in_cluster * 512,
1460 buf, n, sector_num);
1465 /* update L2 tables */
1466 if (vmdk_L2update(extent, &m_data) != VMDK_OK) {
1475 /* update CID on the first write every time the virtual disk is
1477 if (!s->cid_updated) {
1478 ret = vmdk_write_cid(bs, time(NULL));
1482 s->cid_updated = true;
1488 static coroutine_fn int vmdk_co_write(BlockDriverState *bs, int64_t sector_num,
1489 const uint8_t *buf, int nb_sectors)
1492 BDRVVmdkState *s = bs->opaque;
1493 qemu_co_mutex_lock(&s->lock);
1494 ret = vmdk_write(bs, sector_num, buf, nb_sectors, false, false);
1495 qemu_co_mutex_unlock(&s->lock);
1499 static int vmdk_write_compressed(BlockDriverState *bs,
1504 BDRVVmdkState *s = bs->opaque;
1505 if (s->num_extents == 1 && s->extents[0].compressed) {
1506 return vmdk_write(bs, sector_num, buf, nb_sectors, false, false);
1512 static int coroutine_fn vmdk_co_write_zeroes(BlockDriverState *bs,
1515 BdrvRequestFlags flags)
1518 BDRVVmdkState *s = bs->opaque;
1519 qemu_co_mutex_lock(&s->lock);
1520 /* write zeroes could fail if sectors not aligned to cluster, test it with
1521 * dry_run == true before really updating image */
1522 ret = vmdk_write(bs, sector_num, NULL, nb_sectors, true, true);
1524 ret = vmdk_write(bs, sector_num, NULL, nb_sectors, true, false);
1526 qemu_co_mutex_unlock(&s->lock);
1530 static int vmdk_create_extent(const char *filename, int64_t filesize,
1531 bool flat, bool compress, bool zeroed_grain,
1535 BlockDriverState *bs = NULL;
1537 Error *local_err = NULL;
1538 uint32_t tmp, magic, grains, gd_sectors, gt_size, gt_count;
1539 uint32_t *gd_buf = NULL;
1542 ret = bdrv_create_file(filename, NULL, &local_err);
1544 error_propagate(errp, local_err);
1549 ret = bdrv_open(&bs, filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_PROTOCOL,
1552 error_propagate(errp, local_err);
1557 ret = bdrv_truncate(bs, filesize);
1559 error_setg_errno(errp, -ret, "Could not truncate file");
1563 magic = cpu_to_be32(VMDK4_MAGIC);
1564 memset(&header, 0, sizeof(header));
1565 header.version = zeroed_grain ? 2 : 1;
1566 header.flags = VMDK4_FLAG_RGD | VMDK4_FLAG_NL_DETECT
1567 | (compress ? VMDK4_FLAG_COMPRESS | VMDK4_FLAG_MARKER : 0)
1568 | (zeroed_grain ? VMDK4_FLAG_ZERO_GRAIN : 0);
1569 header.compressAlgorithm = compress ? VMDK4_COMPRESSION_DEFLATE : 0;
1570 header.capacity = filesize / BDRV_SECTOR_SIZE;
1571 header.granularity = 128;
1572 header.num_gtes_per_gt = BDRV_SECTOR_SIZE;
1574 grains = DIV_ROUND_UP(filesize / BDRV_SECTOR_SIZE, header.granularity);
1575 gt_size = DIV_ROUND_UP(header.num_gtes_per_gt * sizeof(uint32_t),
1577 gt_count = DIV_ROUND_UP(grains, header.num_gtes_per_gt);
1578 gd_sectors = DIV_ROUND_UP(gt_count * sizeof(uint32_t), BDRV_SECTOR_SIZE);
1580 header.desc_offset = 1;
1581 header.desc_size = 20;
1582 header.rgd_offset = header.desc_offset + header.desc_size;
1583 header.gd_offset = header.rgd_offset + gd_sectors + (gt_size * gt_count);
1584 header.grain_offset =
1585 ROUND_UP(header.gd_offset + gd_sectors + (gt_size * gt_count),
1586 header.granularity);
1587 /* swap endianness for all header fields */
1588 header.version = cpu_to_le32(header.version);
1589 header.flags = cpu_to_le32(header.flags);
1590 header.capacity = cpu_to_le64(header.capacity);
1591 header.granularity = cpu_to_le64(header.granularity);
1592 header.num_gtes_per_gt = cpu_to_le32(header.num_gtes_per_gt);
1593 header.desc_offset = cpu_to_le64(header.desc_offset);
1594 header.desc_size = cpu_to_le64(header.desc_size);
1595 header.rgd_offset = cpu_to_le64(header.rgd_offset);
1596 header.gd_offset = cpu_to_le64(header.gd_offset);
1597 header.grain_offset = cpu_to_le64(header.grain_offset);
1598 header.compressAlgorithm = cpu_to_le16(header.compressAlgorithm);
1600 header.check_bytes[0] = 0xa;
1601 header.check_bytes[1] = 0x20;
1602 header.check_bytes[2] = 0xd;
1603 header.check_bytes[3] = 0xa;
1605 /* write all the data */
1606 ret = bdrv_pwrite(bs, 0, &magic, sizeof(magic));
1608 error_set(errp, QERR_IO_ERROR);
1611 ret = bdrv_pwrite(bs, sizeof(magic), &header, sizeof(header));
1613 error_set(errp, QERR_IO_ERROR);
1617 ret = bdrv_truncate(bs, le64_to_cpu(header.grain_offset) << 9);
1619 error_setg_errno(errp, -ret, "Could not truncate file");
1623 /* write grain directory */
1624 gd_buf_size = gd_sectors * BDRV_SECTOR_SIZE;
1625 gd_buf = g_malloc0(gd_buf_size);
1626 for (i = 0, tmp = le64_to_cpu(header.rgd_offset) + gd_sectors;
1627 i < gt_count; i++, tmp += gt_size) {
1628 gd_buf[i] = cpu_to_le32(tmp);
1630 ret = bdrv_pwrite(bs, le64_to_cpu(header.rgd_offset) * BDRV_SECTOR_SIZE,
1631 gd_buf, gd_buf_size);
1633 error_set(errp, QERR_IO_ERROR);
1637 /* write backup grain directory */
1638 for (i = 0, tmp = le64_to_cpu(header.gd_offset) + gd_sectors;
1639 i < gt_count; i++, tmp += gt_size) {
1640 gd_buf[i] = cpu_to_le32(tmp);
1642 ret = bdrv_pwrite(bs, le64_to_cpu(header.gd_offset) * BDRV_SECTOR_SIZE,
1643 gd_buf, gd_buf_size);
1645 error_set(errp, QERR_IO_ERROR);
1658 static int filename_decompose(const char *filename, char *path, char *prefix,
1659 char *postfix, size_t buf_len, Error **errp)
1663 if (filename == NULL || !strlen(filename)) {
1664 error_setg(errp, "No filename provided");
1667 p = strrchr(filename, '/');
1669 p = strrchr(filename, '\\');
1672 p = strrchr(filename, ':');
1676 if (p - filename >= buf_len) {
1679 pstrcpy(path, p - filename + 1, filename);
1684 q = strrchr(p, '.');
1686 pstrcpy(prefix, buf_len, p);
1689 if (q - p >= buf_len) {
1692 pstrcpy(prefix, q - p + 1, p);
1693 pstrcpy(postfix, buf_len, q);
1698 static int vmdk_create(const char *filename, QemuOpts *opts, Error **errp)
1701 BlockDriverState *new_bs = NULL;
1702 Error *local_err = NULL;
1704 int64_t total_size = 0, filesize;
1705 char *adapter_type = NULL;
1706 char *backing_file = NULL;
1710 bool flat, split, compress;
1711 GString *ext_desc_lines;
1712 char path[PATH_MAX], prefix[PATH_MAX], postfix[PATH_MAX];
1713 const int64_t split_size = 0x80000000; /* VMDK has constant split size */
1714 const char *desc_extent_line;
1715 char parent_desc_line[BUF_SIZE] = "";
1716 uint32_t parent_cid = 0xffffffff;
1717 uint32_t number_heads = 16;
1718 bool zeroed_grain = false;
1719 uint32_t desc_offset = 0, desc_len;
1720 const char desc_template[] =
1721 "# Disk DescriptorFile\n"
1724 "parentCID=%" PRIx32 "\n"
1725 "createType=\"%s\"\n"
1728 "# Extent description\n"
1731 "# The Disk Data Base\n"
1734 "ddb.virtualHWVersion = \"%d\"\n"
1735 "ddb.geometry.cylinders = \"%" PRId64 "\"\n"
1736 "ddb.geometry.heads = \"%" PRIu32 "\"\n"
1737 "ddb.geometry.sectors = \"63\"\n"
1738 "ddb.adapterType = \"%s\"\n";
1740 ext_desc_lines = g_string_new(NULL);
1742 if (filename_decompose(filename, path, prefix, postfix, PATH_MAX, errp)) {
1746 /* Read out options */
1747 total_size = qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0);
1748 adapter_type = qemu_opt_get_del(opts, BLOCK_OPT_ADAPTER_TYPE);
1749 backing_file = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FILE);
1750 if (qemu_opt_get_bool_del(opts, BLOCK_OPT_COMPAT6, false)) {
1751 flags |= BLOCK_FLAG_COMPAT6;
1753 fmt = qemu_opt_get_del(opts, BLOCK_OPT_SUBFMT);
1754 if (qemu_opt_get_bool_del(opts, BLOCK_OPT_ZEROED_GRAIN, false)) {
1755 zeroed_grain = true;
1758 if (!adapter_type) {
1759 adapter_type = g_strdup("ide");
1760 } else if (strcmp(adapter_type, "ide") &&
1761 strcmp(adapter_type, "buslogic") &&
1762 strcmp(adapter_type, "lsilogic") &&
1763 strcmp(adapter_type, "legacyESX")) {
1764 error_setg(errp, "Unknown adapter type: '%s'", adapter_type);
1768 if (strcmp(adapter_type, "ide") != 0) {
1769 /* that's the number of heads with which vmware operates when
1770 creating, exporting, etc. vmdk files with a non-ide adapter type */
1774 /* Default format to monolithicSparse */
1775 fmt = g_strdup("monolithicSparse");
1776 } else if (strcmp(fmt, "monolithicFlat") &&
1777 strcmp(fmt, "monolithicSparse") &&
1778 strcmp(fmt, "twoGbMaxExtentSparse") &&
1779 strcmp(fmt, "twoGbMaxExtentFlat") &&
1780 strcmp(fmt, "streamOptimized")) {
1781 error_setg(errp, "Unknown subformat: '%s'", fmt);
1785 split = !(strcmp(fmt, "twoGbMaxExtentFlat") &&
1786 strcmp(fmt, "twoGbMaxExtentSparse"));
1787 flat = !(strcmp(fmt, "monolithicFlat") &&
1788 strcmp(fmt, "twoGbMaxExtentFlat"));
1789 compress = !strcmp(fmt, "streamOptimized");
1791 desc_extent_line = "RW %" PRId64 " FLAT \"%s\" 0\n";
1793 desc_extent_line = "RW %" PRId64 " SPARSE \"%s\"\n";
1795 if (flat && backing_file) {
1796 error_setg(errp, "Flat image can't have backing file");
1800 if (flat && zeroed_grain) {
1801 error_setg(errp, "Flat image can't enable zeroed grain");
1806 BlockDriverState *bs = NULL;
1807 ret = bdrv_open(&bs, backing_file, NULL, NULL, BDRV_O_NO_BACKING, NULL,
1812 if (strcmp(bs->drv->format_name, "vmdk")) {
1817 parent_cid = vmdk_read_cid(bs, 0);
1819 snprintf(parent_desc_line, sizeof(parent_desc_line),
1820 "parentFileNameHint=\"%s\"", backing_file);
1823 /* Create extents */
1824 filesize = total_size;
1825 while (filesize > 0) {
1826 char desc_line[BUF_SIZE];
1827 char ext_filename[PATH_MAX];
1828 char desc_filename[PATH_MAX];
1829 int64_t size = filesize;
1831 if (split && size > split_size) {
1835 snprintf(desc_filename, sizeof(desc_filename), "%s-%c%03d%s",
1836 prefix, flat ? 'f' : 's', ++idx, postfix);
1838 snprintf(desc_filename, sizeof(desc_filename), "%s-flat%s",
1841 snprintf(desc_filename, sizeof(desc_filename), "%s%s",
1844 snprintf(ext_filename, sizeof(ext_filename), "%s%s",
1845 path, desc_filename);
1847 if (vmdk_create_extent(ext_filename, size,
1848 flat, compress, zeroed_grain, errp)) {
1854 /* Format description line */
1855 snprintf(desc_line, sizeof(desc_line),
1856 desc_extent_line, size / BDRV_SECTOR_SIZE, desc_filename);
1857 g_string_append(ext_desc_lines, desc_line);
1859 /* generate descriptor file */
1860 desc = g_strdup_printf(desc_template,
1861 (uint32_t)time(NULL),
1865 ext_desc_lines->str,
1866 (flags & BLOCK_FLAG_COMPAT6 ? 6 : 4),
1868 (int64_t)(63 * number_heads * BDRV_SECTOR_SIZE),
1871 desc_len = strlen(desc);
1872 /* the descriptor offset = 0x200 */
1873 if (!split && !flat) {
1874 desc_offset = 0x200;
1876 ret = bdrv_create_file(filename, opts, &local_err);
1878 error_propagate(errp, local_err);
1882 assert(new_bs == NULL);
1883 ret = bdrv_open(&new_bs, filename, NULL, NULL,
1884 BDRV_O_RDWR | BDRV_O_PROTOCOL, NULL, &local_err);
1886 error_propagate(errp, local_err);
1889 ret = bdrv_pwrite(new_bs, desc_offset, desc, desc_len);
1891 error_setg_errno(errp, -ret, "Could not write description");
1894 /* bdrv_pwrite write padding zeros to align to sector, we don't need that
1895 * for description file */
1896 if (desc_offset == 0) {
1897 ret = bdrv_truncate(new_bs, desc_len);
1899 error_setg_errno(errp, -ret, "Could not truncate file");
1906 g_free(adapter_type);
1907 g_free(backing_file);
1910 g_string_free(ext_desc_lines, true);
1914 static void vmdk_close(BlockDriverState *bs)
1916 BDRVVmdkState *s = bs->opaque;
1918 vmdk_free_extents(bs);
1919 g_free(s->create_type);
1921 migrate_del_blocker(s->migration_blocker);
1922 error_free(s->migration_blocker);
1925 static coroutine_fn int vmdk_co_flush(BlockDriverState *bs)
1927 BDRVVmdkState *s = bs->opaque;
1931 for (i = 0; i < s->num_extents; i++) {
1932 err = bdrv_co_flush(s->extents[i].file);
1940 static int64_t vmdk_get_allocated_file_size(BlockDriverState *bs)
1945 BDRVVmdkState *s = bs->opaque;
1947 ret = bdrv_get_allocated_file_size(bs->file);
1951 for (i = 0; i < s->num_extents; i++) {
1952 if (s->extents[i].file == bs->file) {
1955 r = bdrv_get_allocated_file_size(s->extents[i].file);
1964 static int vmdk_has_zero_init(BlockDriverState *bs)
1967 BDRVVmdkState *s = bs->opaque;
1969 /* If has a flat extent and its underlying storage doesn't have zero init,
1971 for (i = 0; i < s->num_extents; i++) {
1972 if (s->extents[i].flat) {
1973 if (!bdrv_has_zero_init(s->extents[i].file)) {
1981 static ImageInfo *vmdk_get_extent_info(VmdkExtent *extent)
1983 ImageInfo *info = g_new0(ImageInfo, 1);
1985 *info = (ImageInfo){
1986 .filename = g_strdup(extent->file->filename),
1987 .format = g_strdup(extent->type),
1988 .virtual_size = extent->sectors * BDRV_SECTOR_SIZE,
1989 .compressed = extent->compressed,
1990 .has_compressed = extent->compressed,
1991 .cluster_size = extent->cluster_sectors * BDRV_SECTOR_SIZE,
1992 .has_cluster_size = !extent->flat,
1998 static int vmdk_check(BlockDriverState *bs, BdrvCheckResult *result,
2001 BDRVVmdkState *s = bs->opaque;
2002 VmdkExtent *extent = NULL;
2003 int64_t sector_num = 0;
2004 int64_t total_sectors = bdrv_getlength(bs) / BDRV_SECTOR_SIZE;
2006 uint64_t cluster_offset;
2013 if (sector_num >= total_sectors) {
2016 extent = find_extent(s, sector_num, extent);
2019 "ERROR: could not find extent for sector %" PRId64 "\n",
2023 ret = get_cluster_offset(bs, extent, NULL,
2024 sector_num << BDRV_SECTOR_BITS,
2025 0, &cluster_offset);
2026 if (ret == VMDK_ERROR) {
2028 "ERROR: could not get cluster_offset for sector %"
2029 PRId64 "\n", sector_num);
2032 if (ret == VMDK_OK && cluster_offset >= bdrv_getlength(extent->file)) {
2034 "ERROR: cluster offset for sector %"
2035 PRId64 " points after EOF\n", sector_num);
2038 sector_num += extent->cluster_sectors;
2041 result->corruptions++;
2045 static ImageInfoSpecific *vmdk_get_specific_info(BlockDriverState *bs)
2048 BDRVVmdkState *s = bs->opaque;
2049 ImageInfoSpecific *spec_info = g_new0(ImageInfoSpecific, 1);
2050 ImageInfoList **next;
2052 *spec_info = (ImageInfoSpecific){
2053 .kind = IMAGE_INFO_SPECIFIC_KIND_VMDK,
2055 .vmdk = g_new0(ImageInfoSpecificVmdk, 1),
2059 *spec_info->vmdk = (ImageInfoSpecificVmdk) {
2060 .create_type = g_strdup(s->create_type),
2062 .parent_cid = s->parent_cid,
2065 next = &spec_info->vmdk->extents;
2066 for (i = 0; i < s->num_extents; i++) {
2067 *next = g_new0(ImageInfoList, 1);
2068 (*next)->value = vmdk_get_extent_info(&s->extents[i]);
2069 (*next)->next = NULL;
2070 next = &(*next)->next;
2076 static int vmdk_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
2079 BDRVVmdkState *s = bs->opaque;
2080 assert(s->num_extents);
2081 bdi->needs_compressed_writes = s->extents[0].compressed;
2082 if (!s->extents[0].flat) {
2083 bdi->cluster_size = s->extents[0].cluster_sectors << BDRV_SECTOR_BITS;
2085 /* See if we have multiple extents but they have different cases */
2086 for (i = 1; i < s->num_extents; i++) {
2087 if (bdi->needs_compressed_writes != s->extents[i].compressed ||
2088 (bdi->cluster_size && bdi->cluster_size !=
2089 s->extents[i].cluster_sectors << BDRV_SECTOR_BITS)) {
2096 static void vmdk_detach_aio_context(BlockDriverState *bs)
2098 BDRVVmdkState *s = bs->opaque;
2101 for (i = 0; i < s->num_extents; i++) {
2102 bdrv_detach_aio_context(s->extents[i].file);
2106 static void vmdk_attach_aio_context(BlockDriverState *bs,
2107 AioContext *new_context)
2109 BDRVVmdkState *s = bs->opaque;
2112 for (i = 0; i < s->num_extents; i++) {
2113 bdrv_attach_aio_context(s->extents[i].file, new_context);
2117 static QemuOptsList vmdk_create_opts = {
2118 .name = "vmdk-create-opts",
2119 .head = QTAILQ_HEAD_INITIALIZER(vmdk_create_opts.head),
2122 .name = BLOCK_OPT_SIZE,
2123 .type = QEMU_OPT_SIZE,
2124 .help = "Virtual disk size"
2127 .name = BLOCK_OPT_ADAPTER_TYPE,
2128 .type = QEMU_OPT_STRING,
2129 .help = "Virtual adapter type, can be one of "
2130 "ide (default), lsilogic, buslogic or legacyESX"
2133 .name = BLOCK_OPT_BACKING_FILE,
2134 .type = QEMU_OPT_STRING,
2135 .help = "File name of a base image"
2138 .name = BLOCK_OPT_COMPAT6,
2139 .type = QEMU_OPT_BOOL,
2140 .help = "VMDK version 6 image",
2141 .def_value_str = "off"
2144 .name = BLOCK_OPT_SUBFMT,
2145 .type = QEMU_OPT_STRING,
2147 "VMDK flat extent format, can be one of "
2148 "{monolithicSparse (default) | monolithicFlat | twoGbMaxExtentSparse | twoGbMaxExtentFlat | streamOptimized} "
2151 .name = BLOCK_OPT_ZEROED_GRAIN,
2152 .type = QEMU_OPT_BOOL,
2153 .help = "Enable efficient zero writes "
2154 "using the zeroed-grain GTE feature"
2156 { /* end of list */ }
2160 static BlockDriver bdrv_vmdk = {
2161 .format_name = "vmdk",
2162 .instance_size = sizeof(BDRVVmdkState),
2163 .bdrv_probe = vmdk_probe,
2164 .bdrv_open = vmdk_open,
2165 .bdrv_check = vmdk_check,
2166 .bdrv_reopen_prepare = vmdk_reopen_prepare,
2167 .bdrv_read = vmdk_co_read,
2168 .bdrv_write = vmdk_co_write,
2169 .bdrv_write_compressed = vmdk_write_compressed,
2170 .bdrv_co_write_zeroes = vmdk_co_write_zeroes,
2171 .bdrv_close = vmdk_close,
2172 .bdrv_create = vmdk_create,
2173 .bdrv_co_flush_to_disk = vmdk_co_flush,
2174 .bdrv_co_get_block_status = vmdk_co_get_block_status,
2175 .bdrv_get_allocated_file_size = vmdk_get_allocated_file_size,
2176 .bdrv_has_zero_init = vmdk_has_zero_init,
2177 .bdrv_get_specific_info = vmdk_get_specific_info,
2178 .bdrv_refresh_limits = vmdk_refresh_limits,
2179 .bdrv_get_info = vmdk_get_info,
2180 .bdrv_detach_aio_context = vmdk_detach_aio_context,
2181 .bdrv_attach_aio_context = vmdk_attach_aio_context,
2183 .create_opts = &vmdk_create_opts,
2186 static void bdrv_vmdk_init(void)
2188 bdrv_register(&bdrv_vmdk);
2191 block_init(bdrv_vmdk_init);