--- /dev/null
+/*
+ * Block driver for the VMDK format
+ *
+ * Copyright (c) 2004 Fabrice Bellard
+ * Copyright (c) 2005 Filip Navara
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "qemu-common.h"
+#include "block/block_int.h"
+#include "qapi/qmp/qerror.h"
+#include "qemu/error-report.h"
+#include "qemu/module.h"
+#include "migration/migration.h"
+#include <zlib.h>
+#include <glib.h>
+
+#define VMDK3_MAGIC (('C' << 24) | ('O' << 16) | ('W' << 8) | 'D')
+#define VMDK4_MAGIC (('K' << 24) | ('D' << 16) | ('M' << 8) | 'V')
+#define VMDK4_COMPRESSION_DEFLATE 1
+#define VMDK4_FLAG_NL_DETECT (1 << 0)
+#define VMDK4_FLAG_RGD (1 << 1)
+/* Zeroed-grain enable bit */
+#define VMDK4_FLAG_ZERO_GRAIN (1 << 2)
+#define VMDK4_FLAG_COMPRESS (1 << 16)
+#define VMDK4_FLAG_MARKER (1 << 17)
+#define VMDK4_GD_AT_END 0xffffffffffffffffULL
+
+#define VMDK_GTE_ZEROED 0x1
+
+/* VMDK internal error codes */
+#define VMDK_OK 0
+#define VMDK_ERROR (-1)
+/* Cluster not allocated */
+#define VMDK_UNALLOC (-2)
+#define VMDK_ZEROED (-3)
+
+#define BLOCK_OPT_ZEROED_GRAIN "zeroed_grain"
+
+typedef struct {
+ uint32_t version;
+ uint32_t flags;
+ uint32_t disk_sectors;
+ uint32_t granularity;
+ uint32_t l1dir_offset;
+ uint32_t l1dir_size;
+ uint32_t file_sectors;
+ uint32_t cylinders;
+ uint32_t heads;
+ uint32_t sectors_per_track;
+} QEMU_PACKED VMDK3Header;
+
+typedef struct {
+ uint32_t version;
+ uint32_t flags;
+ uint64_t capacity;
+ uint64_t granularity;
+ uint64_t desc_offset;
+ uint64_t desc_size;
+ /* Number of GrainTableEntries per GrainTable */
+ uint32_t num_gtes_per_gt;
+ uint64_t rgd_offset;
+ uint64_t gd_offset;
+ uint64_t grain_offset;
+ char filler[1];
+ char check_bytes[4];
+ uint16_t compressAlgorithm;
+} QEMU_PACKED VMDK4Header;
+
+#define L2_CACHE_SIZE 16
+
+typedef struct VmdkExtent {
+ BlockDriverState *file;
+ bool flat;
+ bool compressed;
+ bool has_marker;
+ bool has_zero_grain;
+ int version;
+ int64_t sectors;
+ int64_t end_sector;
+ int64_t flat_start_offset;
+ int64_t l1_table_offset;
+ int64_t l1_backup_table_offset;
+ uint32_t *l1_table;
+ uint32_t *l1_backup_table;
+ unsigned int l1_size;
+ uint32_t l1_entry_sectors;
+
+ unsigned int l2_size;
+ uint32_t *l2_cache;
+ uint32_t l2_cache_offsets[L2_CACHE_SIZE];
+ uint32_t l2_cache_counts[L2_CACHE_SIZE];
+
+ int64_t cluster_sectors;
+ int64_t next_cluster_sector;
+ char *type;
+} VmdkExtent;
+
+typedef struct BDRVVmdkState {
+ CoMutex lock;
+ uint64_t desc_offset;
+ bool cid_updated;
+ bool cid_checked;
+ uint32_t cid;
+ uint32_t parent_cid;
+ int num_extents;
+ /* Extent array with num_extents entries, ascend ordered by address */
+ VmdkExtent *extents;
+ Error *migration_blocker;
+ char *create_type;
+} BDRVVmdkState;
+
+typedef struct VmdkMetaData {
+ unsigned int l1_index;
+ unsigned int l2_index;
+ unsigned int l2_offset;
+ int valid;
+ uint32_t *l2_cache_entry;
+} VmdkMetaData;
+
+typedef struct VmdkGrainMarker {
+ uint64_t lba;
+ uint32_t size;
+ uint8_t data[0];
+} QEMU_PACKED VmdkGrainMarker;
+
+enum {
+ MARKER_END_OF_STREAM = 0,
+ MARKER_GRAIN_TABLE = 1,
+ MARKER_GRAIN_DIRECTORY = 2,
+ MARKER_FOOTER = 3,
+};
+
+static int vmdk_probe(const uint8_t *buf, int buf_size, const char *filename)
+{
+ uint32_t magic;
+
+ if (buf_size < 4) {
+ return 0;
+ }
+ magic = be32_to_cpu(*(uint32_t *)buf);
+ if (magic == VMDK3_MAGIC ||
+ magic == VMDK4_MAGIC) {
+ return 100;
+ } else {
+ const char *p = (const char *)buf;
+ const char *end = p + buf_size;
+ while (p < end) {
+ if (*p == '#') {
+ /* skip comment line */
+ while (p < end && *p != '\n') {
+ p++;
+ }
+ p++;
+ continue;
+ }
+ if (*p == ' ') {
+ while (p < end && *p == ' ') {
+ p++;
+ }
+ /* skip '\r' if windows line endings used. */
+ if (p < end && *p == '\r') {
+ p++;
+ }
+ /* only accept blank lines before 'version=' line */
+ if (p == end || *p != '\n') {
+ return 0;
+ }
+ p++;
+ continue;
+ }
+ if (end - p >= strlen("version=X\n")) {
+ if (strncmp("version=1\n", p, strlen("version=1\n")) == 0 ||
+ strncmp("version=2\n", p, strlen("version=2\n")) == 0) {
+ return 100;
+ }
+ }
+ if (end - p >= strlen("version=X\r\n")) {
+ if (strncmp("version=1\r\n", p, strlen("version=1\r\n")) == 0 ||
+ strncmp("version=2\r\n", p, strlen("version=2\r\n")) == 0) {
+ return 100;
+ }
+ }
+ return 0;
+ }
+ return 0;
+ }
+}
+
+#define SECTOR_SIZE 512
+#define DESC_SIZE (20 * SECTOR_SIZE) /* 20 sectors of 512 bytes each */
+#define BUF_SIZE 4096
+#define HEADER_SIZE 512 /* first sector of 512 bytes */
+
+static void vmdk_free_extents(BlockDriverState *bs)
+{
+ int i;
+ BDRVVmdkState *s = bs->opaque;
+ VmdkExtent *e;
+
+ for (i = 0; i < s->num_extents; i++) {
+ e = &s->extents[i];
+ g_free(e->l1_table);
+ g_free(e->l2_cache);
+ g_free(e->l1_backup_table);
+ g_free(e->type);
+ if (e->file != bs->file) {
+ bdrv_unref(e->file);
+ }
+ }
+ g_free(s->extents);
+}
+
+static void vmdk_free_last_extent(BlockDriverState *bs)
+{
+ BDRVVmdkState *s = bs->opaque;
+
+ if (s->num_extents == 0) {
+ return;
+ }
+ s->num_extents--;
+ s->extents = g_renew(VmdkExtent, s->extents, s->num_extents);
+}
+
+static uint32_t vmdk_read_cid(BlockDriverState *bs, int parent)
+{
+ char desc[DESC_SIZE];
+ uint32_t cid = 0xffffffff;
+ const char *p_name, *cid_str;
+ size_t cid_str_size;
+ BDRVVmdkState *s = bs->opaque;
+ int ret;
+
+ ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE);
+ if (ret < 0) {
+ return 0;
+ }
+
+ if (parent) {
+ cid_str = "parentCID";
+ cid_str_size = sizeof("parentCID");
+ } else {
+ cid_str = "CID";
+ cid_str_size = sizeof("CID");
+ }
+
+ desc[DESC_SIZE - 1] = '\0';
+ p_name = strstr(desc, cid_str);
+ if (p_name != NULL) {
+ p_name += cid_str_size;
+ sscanf(p_name, "%" SCNx32, &cid);
+ }
+
+ return cid;
+}
+
+static int vmdk_write_cid(BlockDriverState *bs, uint32_t cid)
+{
+ char desc[DESC_SIZE], tmp_desc[DESC_SIZE];
+ char *p_name, *tmp_str;
+ BDRVVmdkState *s = bs->opaque;
+ int ret;
+
+ ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE);
+ if (ret < 0) {
+ return ret;
+ }
+
+ desc[DESC_SIZE - 1] = '\0';
+ tmp_str = strstr(desc, "parentCID");
+ if (tmp_str == NULL) {
+ return -EINVAL;
+ }
+
+ pstrcpy(tmp_desc, sizeof(tmp_desc), tmp_str);
+ p_name = strstr(desc, "CID");
+ if (p_name != NULL) {
+ p_name += sizeof("CID");
+ snprintf(p_name, sizeof(desc) - (p_name - desc), "%" PRIx32 "\n", cid);
+ pstrcat(desc, sizeof(desc), tmp_desc);
+ }
+
+ ret = bdrv_pwrite_sync(bs->file, s->desc_offset, desc, DESC_SIZE);
+ if (ret < 0) {
+ return ret;
+ }
+
+ return 0;
+}
+
+static int vmdk_is_cid_valid(BlockDriverState *bs)
+{
+ BDRVVmdkState *s = bs->opaque;
+ BlockDriverState *p_bs = bs->backing_hd;
+ uint32_t cur_pcid;
+
+ if (!s->cid_checked && p_bs) {
+ cur_pcid = vmdk_read_cid(p_bs, 0);
+ if (s->parent_cid != cur_pcid) {
+ /* CID not valid */
+ return 0;
+ }
+ }
+ s->cid_checked = true;
+ /* CID valid */
+ return 1;
+}
+
+/* We have nothing to do for VMDK reopen, stubs just return success */
+static int vmdk_reopen_prepare(BDRVReopenState *state,
+ BlockReopenQueue *queue, Error **errp)
+{
+ assert(state != NULL);
+ assert(state->bs != NULL);
+ return 0;
+}
+
+static int vmdk_parent_open(BlockDriverState *bs)
+{
+ char *p_name;
+ char desc[DESC_SIZE + 1];
+ BDRVVmdkState *s = bs->opaque;
+ int ret;
+
+ desc[DESC_SIZE] = '\0';
+ ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE);
+ if (ret < 0) {
+ return ret;
+ }
+
+ p_name = strstr(desc, "parentFileNameHint");
+ if (p_name != NULL) {
+ char *end_name;
+
+ p_name += sizeof("parentFileNameHint") + 1;
+ end_name = strchr(p_name, '\"');
+ if (end_name == NULL) {
+ return -EINVAL;
+ }
+ if ((end_name - p_name) > sizeof(bs->backing_file) - 1) {
+ return -EINVAL;
+ }
+
+ pstrcpy(bs->backing_file, end_name - p_name + 1, p_name);
+ }
+
+ return 0;
+}
+
+/* Create and append extent to the extent array. Return the added VmdkExtent
+ * address. return NULL if allocation failed. */
+static int vmdk_add_extent(BlockDriverState *bs,
+ BlockDriverState *file, bool flat, int64_t sectors,
+ int64_t l1_offset, int64_t l1_backup_offset,
+ uint32_t l1_size,
+ int l2_size, uint64_t cluster_sectors,
+ VmdkExtent **new_extent,
+ Error **errp)
+{
+ VmdkExtent *extent;
+ BDRVVmdkState *s = bs->opaque;
+ int64_t nb_sectors;
+
+ if (cluster_sectors > 0x200000) {
+ /* 0x200000 * 512Bytes = 1GB for one cluster is unrealistic */
+ error_setg(errp, "Invalid granularity, image may be corrupt");
+ return -EFBIG;
+ }
+ if (l1_size > 512 * 1024 * 1024) {
+ /* Although with big capacity and small l1_entry_sectors, we can get a
+ * big l1_size, we don't want unbounded value to allocate the table.
+ * Limit it to 512M, which is 16PB for default cluster and L2 table
+ * size */
+ error_setg(errp, "L1 size too big");
+ return -EFBIG;
+ }
+
+ nb_sectors = bdrv_nb_sectors(file);
+ if (nb_sectors < 0) {
+ return nb_sectors;
+ }
+
+ s->extents = g_renew(VmdkExtent, s->extents, s->num_extents + 1);
+ extent = &s->extents[s->num_extents];
+ s->num_extents++;
+
+ memset(extent, 0, sizeof(VmdkExtent));
+ extent->file = file;
+ extent->flat = flat;
+ extent->sectors = sectors;
+ extent->l1_table_offset = l1_offset;
+ extent->l1_backup_table_offset = l1_backup_offset;
+ extent->l1_size = l1_size;
+ extent->l1_entry_sectors = l2_size * cluster_sectors;
+ extent->l2_size = l2_size;
+ extent->cluster_sectors = flat ? sectors : cluster_sectors;
+ extent->next_cluster_sector = ROUND_UP(nb_sectors, cluster_sectors);
+
+ if (s->num_extents > 1) {
+ extent->end_sector = (*(extent - 1)).end_sector + extent->sectors;
+ } else {
+ extent->end_sector = extent->sectors;
+ }
+ bs->total_sectors = extent->end_sector;
+ if (new_extent) {
+ *new_extent = extent;
+ }
+ return 0;
+}
+
+static int vmdk_init_tables(BlockDriverState *bs, VmdkExtent *extent,
+ Error **errp)
+{
+ int ret;
+ size_t l1_size;
+ int i;
+
+ /* read the L1 table */
+ l1_size = extent->l1_size * sizeof(uint32_t);
+ extent->l1_table = g_try_malloc(l1_size);
+ if (l1_size && extent->l1_table == NULL) {
+ return -ENOMEM;
+ }
+
+ ret = bdrv_pread(extent->file,
+ extent->l1_table_offset,
+ extent->l1_table,
+ l1_size);
+ if (ret < 0) {
+ error_setg_errno(errp, -ret,
+ "Could not read l1 table from extent '%s'",
+ extent->file->filename);
+ goto fail_l1;
+ }
+ for (i = 0; i < extent->l1_size; i++) {
+ le32_to_cpus(&extent->l1_table[i]);
+ }
+
+ if (extent->l1_backup_table_offset) {
+ extent->l1_backup_table = g_try_malloc(l1_size);
+ if (l1_size && extent->l1_backup_table == NULL) {
+ ret = -ENOMEM;
+ goto fail_l1;
+ }
+ ret = bdrv_pread(extent->file,
+ extent->l1_backup_table_offset,
+ extent->l1_backup_table,
+ l1_size);
+ if (ret < 0) {
+ error_setg_errno(errp, -ret,
+ "Could not read l1 backup table from extent '%s'",
+ extent->file->filename);
+ goto fail_l1b;
+ }
+ for (i = 0; i < extent->l1_size; i++) {
+ le32_to_cpus(&extent->l1_backup_table[i]);
+ }
+ }
+
+ extent->l2_cache =
+ g_new(uint32_t, extent->l2_size * L2_CACHE_SIZE);
+ return 0;
+ fail_l1b:
+ g_free(extent->l1_backup_table);
+ fail_l1:
+ g_free(extent->l1_table);
+ return ret;
+}
+
+static int vmdk_open_vmfs_sparse(BlockDriverState *bs,
+ BlockDriverState *file,
+ int flags, Error **errp)
+{
+ int ret;
+ uint32_t magic;
+ VMDK3Header header;
+ VmdkExtent *extent;
+
+ ret = bdrv_pread(file, sizeof(magic), &header, sizeof(header));
+ if (ret < 0) {
+ error_setg_errno(errp, -ret,
+ "Could not read header from file '%s'",
+ file->filename);
+ return ret;
+ }
+ ret = vmdk_add_extent(bs, file, false,
+ le32_to_cpu(header.disk_sectors),
+ (int64_t)le32_to_cpu(header.l1dir_offset) << 9,
+ 0,
+ le32_to_cpu(header.l1dir_size),
+ 4096,
+ le32_to_cpu(header.granularity),
+ &extent,
+ errp);
+ if (ret < 0) {
+ return ret;
+ }
+ ret = vmdk_init_tables(bs, extent, errp);
+ if (ret) {
+ /* free extent allocated by vmdk_add_extent */
+ vmdk_free_last_extent(bs);
+ }
+ return ret;
+}
+
+static int vmdk_open_desc_file(BlockDriverState *bs, int flags, char *buf,
+ QDict *options, Error **errp);
+
+static char *vmdk_read_desc(BlockDriverState *file, uint64_t desc_offset,
+ Error **errp)
+{
+ int64_t size;
+ char *buf;
+ int ret;
+
+ size = bdrv_getlength(file);
+ if (size < 0) {
+ error_setg_errno(errp, -size, "Could not access file");
+ return NULL;
+ }
+
+ if (size < 4) {
+ /* Both descriptor file and sparse image must be much larger than 4
+ * bytes, also callers of vmdk_read_desc want to compare the first 4
+ * bytes with VMDK4_MAGIC, let's error out if less is read. */
+ error_setg(errp, "File is too small, not a valid image");
+ return NULL;
+ }
+
+ size = MIN(size, (1 << 20) - 1); /* avoid unbounded allocation */
+ buf = g_malloc(size + 1);
+
+ ret = bdrv_pread(file, desc_offset, buf, size);
+ if (ret < 0) {
+ error_setg_errno(errp, -ret, "Could not read from file");
+ g_free(buf);
+ return NULL;
+ }
+ buf[ret] = 0;
+
+ return buf;
+}
+
+static int vmdk_open_vmdk4(BlockDriverState *bs,
+ BlockDriverState *file,
+ int flags, QDict *options, Error **errp)
+{
+ int ret;
+ uint32_t magic;
+ uint32_t l1_size, l1_entry_sectors;
+ VMDK4Header header;
+ VmdkExtent *extent;
+ BDRVVmdkState *s = bs->opaque;
+ int64_t l1_backup_offset = 0;
+
+ ret = bdrv_pread(file, sizeof(magic), &header, sizeof(header));
+ if (ret < 0) {
+ error_setg_errno(errp, -ret,
+ "Could not read header from file '%s'",
+ file->filename);
+ return -EINVAL;
+ }
+ if (header.capacity == 0) {
+ uint64_t desc_offset = le64_to_cpu(header.desc_offset);
+ if (desc_offset) {
+ char *buf = vmdk_read_desc(file, desc_offset << 9, errp);
+ if (!buf) {
+ return -EINVAL;
+ }
+ ret = vmdk_open_desc_file(bs, flags, buf, options, errp);
+ g_free(buf);
+ return ret;
+ }
+ }
+
+ if (!s->create_type) {
+ s->create_type = g_strdup("monolithicSparse");
+ }
+
+ if (le64_to_cpu(header.gd_offset) == VMDK4_GD_AT_END) {
+ /*
+ * The footer takes precedence over the header, so read it in. The
+ * footer starts at offset -1024 from the end: One sector for the
+ * footer, and another one for the end-of-stream marker.
+ */
+ struct {
+ struct {
+ uint64_t val;
+ uint32_t size;
+ uint32_t type;
+ uint8_t pad[512 - 16];
+ } QEMU_PACKED footer_marker;
+
+ uint32_t magic;
+ VMDK4Header header;
+ uint8_t pad[512 - 4 - sizeof(VMDK4Header)];
+
+ struct {
+ uint64_t val;
+ uint32_t size;
+ uint32_t type;
+ uint8_t pad[512 - 16];
+ } QEMU_PACKED eos_marker;
+ } QEMU_PACKED footer;
+
+ ret = bdrv_pread(file,
+ bs->file->total_sectors * 512 - 1536,
+ &footer, sizeof(footer));
+ if (ret < 0) {
+ error_setg_errno(errp, -ret, "Failed to read footer");
+ return ret;
+ }
+
+ /* Some sanity checks for the footer */
+ if (be32_to_cpu(footer.magic) != VMDK4_MAGIC ||
+ le32_to_cpu(footer.footer_marker.size) != 0 ||
+ le32_to_cpu(footer.footer_marker.type) != MARKER_FOOTER ||
+ le64_to_cpu(footer.eos_marker.val) != 0 ||
+ le32_to_cpu(footer.eos_marker.size) != 0 ||
+ le32_to_cpu(footer.eos_marker.type) != MARKER_END_OF_STREAM)
+ {
+ error_setg(errp, "Invalid footer");
+ return -EINVAL;
+ }
+
+ header = footer.header;
+ }
+
+ if (le32_to_cpu(header.version) > 3) {
+ char buf[64];
+ snprintf(buf, sizeof(buf), "VMDK version %" PRId32,
+ le32_to_cpu(header.version));
+ error_setg(errp, QERR_UNKNOWN_BLOCK_FORMAT_FEATURE,
+ bdrv_get_device_or_node_name(bs), "vmdk", buf);
+ return -ENOTSUP;
+ } else if (le32_to_cpu(header.version) == 3 && (flags & BDRV_O_RDWR)) {
+ /* VMware KB 2064959 explains that version 3 added support for
+ * persistent changed block tracking (CBT), and backup software can
+ * read it as version=1 if it doesn't care about the changed area
+ * information. So we are safe to enable read only. */
+ error_setg(errp, "VMDK version 3 must be read only");
+ return -EINVAL;
+ }
+
+ if (le32_to_cpu(header.num_gtes_per_gt) > 512) {
+ error_setg(errp, "L2 table size too big");
+ return -EINVAL;
+ }
+
+ l1_entry_sectors = le32_to_cpu(header.num_gtes_per_gt)
+ * le64_to_cpu(header.granularity);
+ if (l1_entry_sectors == 0) {
+ error_setg(errp, "L1 entry size is invalid");
+ return -EINVAL;
+ }
+ l1_size = (le64_to_cpu(header.capacity) + l1_entry_sectors - 1)
+ / l1_entry_sectors;
+ if (le32_to_cpu(header.flags) & VMDK4_FLAG_RGD) {
+ l1_backup_offset = le64_to_cpu(header.rgd_offset) << 9;
+ }
+ if (bdrv_nb_sectors(file) < le64_to_cpu(header.grain_offset)) {
+ error_setg(errp, "File truncated, expecting at least %" PRId64 " bytes",
+ (int64_t)(le64_to_cpu(header.grain_offset)
+ * BDRV_SECTOR_SIZE));
+ return -EINVAL;
+ }
+
+ ret = vmdk_add_extent(bs, file, false,
+ le64_to_cpu(header.capacity),
+ le64_to_cpu(header.gd_offset) << 9,
+ l1_backup_offset,
+ l1_size,
+ le32_to_cpu(header.num_gtes_per_gt),
+ le64_to_cpu(header.granularity),
+ &extent,
+ errp);
+ if (ret < 0) {
+ return ret;
+ }
+ extent->compressed =
+ le16_to_cpu(header.compressAlgorithm) == VMDK4_COMPRESSION_DEFLATE;
+ if (extent->compressed) {
+ g_free(s->create_type);
+ s->create_type = g_strdup("streamOptimized");
+ }
+ extent->has_marker = le32_to_cpu(header.flags) & VMDK4_FLAG_MARKER;
+ extent->version = le32_to_cpu(header.version);
+ extent->has_zero_grain = le32_to_cpu(header.flags) & VMDK4_FLAG_ZERO_GRAIN;
+ ret = vmdk_init_tables(bs, extent, errp);
+ if (ret) {
+ /* free extent allocated by vmdk_add_extent */
+ vmdk_free_last_extent(bs);
+ }
+ return ret;
+}
+
+/* find an option value out of descriptor file */
+static int vmdk_parse_description(const char *desc, const char *opt_name,
+ char *buf, int buf_size)
+{
+ char *opt_pos, *opt_end;
+ const char *end = desc + strlen(desc);
+
+ opt_pos = strstr(desc, opt_name);
+ if (!opt_pos) {
+ return VMDK_ERROR;
+ }
+ /* Skip "=\"" following opt_name */
+ opt_pos += strlen(opt_name) + 2;
+ if (opt_pos >= end) {
+ return VMDK_ERROR;
+ }
+ opt_end = opt_pos;
+ while (opt_end < end && *opt_end != '"') {
+ opt_end++;
+ }
+ if (opt_end == end || buf_size < opt_end - opt_pos + 1) {
+ return VMDK_ERROR;
+ }
+ pstrcpy(buf, opt_end - opt_pos + 1, opt_pos);
+ return VMDK_OK;
+}
+
+/* Open an extent file and append to bs array */
+static int vmdk_open_sparse(BlockDriverState *bs,
+ BlockDriverState *file, int flags,
+ char *buf, QDict *options, Error **errp)
+{
+ uint32_t magic;
+
+ magic = ldl_be_p(buf);
+ switch (magic) {
+ case VMDK3_MAGIC:
+ return vmdk_open_vmfs_sparse(bs, file, flags, errp);
+ break;
+ case VMDK4_MAGIC:
+ return vmdk_open_vmdk4(bs, file, flags, options, errp);
+ break;
+ default:
+ error_setg(errp, "Image not in VMDK format");
+ return -EINVAL;
+ break;
+ }
+}
+
+static int vmdk_parse_extents(const char *desc, BlockDriverState *bs,
+ const char *desc_file_path, QDict *options,
+ Error **errp)
+{
+ int ret;
+ int matches;
+ char access[11];
+ char type[11];
+ char fname[512];
+ const char *p = desc;
+ int64_t sectors = 0;
+ int64_t flat_offset;
+ char *extent_path;
+ BlockDriverState *extent_file;
+ BDRVVmdkState *s = bs->opaque;
+ VmdkExtent *extent;
+ char extent_opt_prefix[32];
+
+ while (*p) {
+ /* parse extent line in one of below formats:
+ *
+ * RW [size in sectors] FLAT "file-name.vmdk" OFFSET
+ * RW [size in sectors] SPARSE "file-name.vmdk"
+ * RW [size in sectors] VMFS "file-name.vmdk"
+ * RW [size in sectors] VMFSSPARSE "file-name.vmdk"
+ */
+ flat_offset = -1;
+ matches = sscanf(p, "%10s %" SCNd64 " %10s \"%511[^\n\r\"]\" %" SCNd64,
+ access, §ors, type, fname, &flat_offset);
+ if (matches < 4 || strcmp(access, "RW")) {
+ goto next_line;
+ } else if (!strcmp(type, "FLAT")) {
+ if (matches != 5 || flat_offset < 0) {
+ error_setg(errp, "Invalid extent lines: \n%s", p);
+ return -EINVAL;
+ }
+ } else if (!strcmp(type, "VMFS")) {
+ if (matches == 4) {
+ flat_offset = 0;
+ } else {
+ error_setg(errp, "Invalid extent lines:\n%s", p);
+ return -EINVAL;
+ }
+ } else if (matches != 4) {
+ error_setg(errp, "Invalid extent lines:\n%s", p);
+ return -EINVAL;
+ }
+
+ if (sectors <= 0 ||
+ (strcmp(type, "FLAT") && strcmp(type, "SPARSE") &&
+ strcmp(type, "VMFS") && strcmp(type, "VMFSSPARSE")) ||
+ (strcmp(access, "RW"))) {
+ goto next_line;
+ }
+
+ if (!path_is_absolute(fname) && !path_has_protocol(fname) &&
+ !desc_file_path[0])
+ {
+ error_setg(errp, "Cannot use relative extent paths with VMDK "
+ "descriptor file '%s'", bs->file->filename);
+ return -EINVAL;
+ }
+
+ extent_path = g_malloc0(PATH_MAX);
+ path_combine(extent_path, PATH_MAX, desc_file_path, fname);
+ extent_file = NULL;
+
+ ret = snprintf(extent_opt_prefix, 32, "extents.%d", s->num_extents);
+ assert(ret < 32);
+
+ ret = bdrv_open_image(&extent_file, extent_path, options,
+ extent_opt_prefix, bs, &child_file, false, errp);
+ g_free(extent_path);
+ if (ret) {
+ return ret;
+ }
+
+ /* save to extents array */
+ if (!strcmp(type, "FLAT") || !strcmp(type, "VMFS")) {
+ /* FLAT extent */
+
+ ret = vmdk_add_extent(bs, extent_file, true, sectors,
+ 0, 0, 0, 0, 0, &extent, errp);
+ if (ret < 0) {
+ bdrv_unref(extent_file);
+ return ret;
+ }
+ extent->flat_start_offset = flat_offset << 9;
+ } else if (!strcmp(type, "SPARSE") || !strcmp(type, "VMFSSPARSE")) {
+ /* SPARSE extent and VMFSSPARSE extent are both "COWD" sparse file*/
+ char *buf = vmdk_read_desc(extent_file, 0, errp);
+ if (!buf) {
+ ret = -EINVAL;
+ } else {
+ ret = vmdk_open_sparse(bs, extent_file, bs->open_flags, buf,
+ options, errp);
+ }
+ g_free(buf);
+ if (ret) {
+ bdrv_unref(extent_file);
+ return ret;
+ }
+ extent = &s->extents[s->num_extents - 1];
+ } else {
+ error_setg(errp, "Unsupported extent type '%s'", type);
+ bdrv_unref(extent_file);
+ return -ENOTSUP;
+ }
+ extent->type = g_strdup(type);
+next_line:
+ /* move to next line */
+ while (*p) {
+ if (*p == '\n') {
+ p++;
+ break;
+ }
+ p++;
+ }
+ }
+ return 0;
+}
+
+static int vmdk_open_desc_file(BlockDriverState *bs, int flags, char *buf,
+ QDict *options, Error **errp)
+{
+ int ret;
+ char ct[128];
+ BDRVVmdkState *s = bs->opaque;
+
+ if (vmdk_parse_description(buf, "createType", ct, sizeof(ct))) {
+ error_setg(errp, "invalid VMDK image descriptor");
+ ret = -EINVAL;
+ goto exit;
+ }
+ if (strcmp(ct, "monolithicFlat") &&
+ strcmp(ct, "vmfs") &&
+ strcmp(ct, "vmfsSparse") &&
+ strcmp(ct, "twoGbMaxExtentSparse") &&
+ strcmp(ct, "twoGbMaxExtentFlat")) {
+ error_setg(errp, "Unsupported image type '%s'", ct);
+ ret = -ENOTSUP;
+ goto exit;
+ }
+ s->create_type = g_strdup(ct);
+ s->desc_offset = 0;
+ ret = vmdk_parse_extents(buf, bs, bs->file->exact_filename, options, errp);
+exit:
+ return ret;
+}
+
+static int vmdk_open(BlockDriverState *bs, QDict *options, int flags,
+ Error **errp)
+{
+ char *buf;
+ int ret;
+ BDRVVmdkState *s = bs->opaque;
+ uint32_t magic;
+
+ buf = vmdk_read_desc(bs->file, 0, errp);
+ if (!buf) {
+ return -EINVAL;
+ }
+
+ magic = ldl_be_p(buf);
+ switch (magic) {
+ case VMDK3_MAGIC:
+ case VMDK4_MAGIC:
+ ret = vmdk_open_sparse(bs, bs->file, flags, buf, options, errp);
+ s->desc_offset = 0x200;
+ break;
+ default:
+ ret = vmdk_open_desc_file(bs, flags, buf, options, errp);
+ break;
+ }
+ if (ret) {
+ goto fail;
+ }
+
+ /* try to open parent images, if exist */
+ ret = vmdk_parent_open(bs);
+ if (ret) {
+ goto fail;
+ }
+ s->cid = vmdk_read_cid(bs, 0);
+ s->parent_cid = vmdk_read_cid(bs, 1);
+ qemu_co_mutex_init(&s->lock);
+
+ /* Disable migration when VMDK images are used */
+ error_setg(&s->migration_blocker, "The vmdk format used by node '%s' "
+ "does not support live migration",
+ bdrv_get_device_or_node_name(bs));
+ migrate_add_blocker(s->migration_blocker);
+ g_free(buf);
+ return 0;
+
+fail:
+ g_free(buf);
+ g_free(s->create_type);
+ s->create_type = NULL;
+ vmdk_free_extents(bs);
+ return ret;
+}
+
+
+static void vmdk_refresh_limits(BlockDriverState *bs, Error **errp)
+{
+ BDRVVmdkState *s = bs->opaque;
+ int i;
+
+ for (i = 0; i < s->num_extents; i++) {
+ if (!s->extents[i].flat) {
+ bs->bl.write_zeroes_alignment =
+ MAX(bs->bl.write_zeroes_alignment,
+ s->extents[i].cluster_sectors);
+ }
+ }
+}
+
+/**
+ * get_whole_cluster
+ *
+ * Copy backing file's cluster that covers @sector_num, otherwise write zero,
+ * to the cluster at @cluster_sector_num.
+ *
+ * If @skip_start_sector < @skip_end_sector, the relative range
+ * [@skip_start_sector, @skip_end_sector) is not copied or written, and leave
+ * it for call to write user data in the request.
+ */
+static int get_whole_cluster(BlockDriverState *bs,
+ VmdkExtent *extent,
+ uint64_t cluster_sector_num,
+ uint64_t sector_num,
+ uint64_t skip_start_sector,
+ uint64_t skip_end_sector)
+{
+ int ret = VMDK_OK;
+ int64_t cluster_bytes;
+ uint8_t *whole_grain;
+
+ /* For COW, align request sector_num to cluster start */
+ sector_num = QEMU_ALIGN_DOWN(sector_num, extent->cluster_sectors);
+ cluster_bytes = extent->cluster_sectors << BDRV_SECTOR_BITS;
+ whole_grain = qemu_blockalign(bs, cluster_bytes);
+
+ if (!bs->backing_hd) {
+ memset(whole_grain, 0, skip_start_sector << BDRV_SECTOR_BITS);
+ memset(whole_grain + (skip_end_sector << BDRV_SECTOR_BITS), 0,
+ cluster_bytes - (skip_end_sector << BDRV_SECTOR_BITS));
+ }
+
+ assert(skip_end_sector <= extent->cluster_sectors);
+ /* we will be here if it's first write on non-exist grain(cluster).
+ * try to read from parent image, if exist */
+ if (bs->backing_hd && !vmdk_is_cid_valid(bs)) {
+ ret = VMDK_ERROR;
+ goto exit;
+ }
+
+ /* Read backing data before skip range */
+ if (skip_start_sector > 0) {
+ if (bs->backing_hd) {
+ ret = bdrv_read(bs->backing_hd, sector_num,
+ whole_grain, skip_start_sector);
+ if (ret < 0) {
+ ret = VMDK_ERROR;
+ goto exit;
+ }
+ }
+ ret = bdrv_write(extent->file, cluster_sector_num, whole_grain,
+ skip_start_sector);
+ if (ret < 0) {
+ ret = VMDK_ERROR;
+ goto exit;
+ }
+ }
+ /* Read backing data after skip range */
+ if (skip_end_sector < extent->cluster_sectors) {
+ if (bs->backing_hd) {
+ ret = bdrv_read(bs->backing_hd, sector_num + skip_end_sector,
+ whole_grain + (skip_end_sector << BDRV_SECTOR_BITS),
+ extent->cluster_sectors - skip_end_sector);
+ if (ret < 0) {
+ ret = VMDK_ERROR;
+ goto exit;
+ }
+ }
+ ret = bdrv_write(extent->file, cluster_sector_num + skip_end_sector,
+ whole_grain + (skip_end_sector << BDRV_SECTOR_BITS),
+ extent->cluster_sectors - skip_end_sector);
+ if (ret < 0) {
+ ret = VMDK_ERROR;
+ goto exit;
+ }
+ }
+
+exit:
+ qemu_vfree(whole_grain);
+ return ret;
+}
+
+static int vmdk_L2update(VmdkExtent *extent, VmdkMetaData *m_data,
+ uint32_t offset)
+{
+ offset = cpu_to_le32(offset);
+ /* update L2 table */
+ if (bdrv_pwrite_sync(
+ extent->file,
+ ((int64_t)m_data->l2_offset * 512)
+ + (m_data->l2_index * sizeof(offset)),
+ &offset, sizeof(offset)) < 0) {
+ return VMDK_ERROR;
+ }
+ /* update backup L2 table */
+ if (extent->l1_backup_table_offset != 0) {
+ m_data->l2_offset = extent->l1_backup_table[m_data->l1_index];
+ if (bdrv_pwrite_sync(
+ extent->file,
+ ((int64_t)m_data->l2_offset * 512)
+ + (m_data->l2_index * sizeof(offset)),
+ &offset, sizeof(offset)) < 0) {
+ return VMDK_ERROR;
+ }
+ }
+ if (m_data->l2_cache_entry) {
+ *m_data->l2_cache_entry = offset;
+ }
+
+ return VMDK_OK;
+}
+
+/**
+ * get_cluster_offset
+ *
+ * Look up cluster offset in extent file by sector number, and store in
+ * @cluster_offset.
+ *
+ * For flat extents, the start offset as parsed from the description file is
+ * returned.
+ *
+ * For sparse extents, look up in L1, L2 table. If allocate is true, return an
+ * offset for a new cluster and update L2 cache. If there is a backing file,
+ * COW is done before returning; otherwise, zeroes are written to the allocated
+ * cluster. Both COW and zero writing skips the sector range
+ * [@skip_start_sector, @skip_end_sector) passed in by caller, because caller
+ * has new data to write there.
+ *
+ * Returns: VMDK_OK if cluster exists and mapped in the image.
+ * VMDK_UNALLOC if cluster is not mapped and @allocate is false.
+ * VMDK_ERROR if failed.
+ */
+static int get_cluster_offset(BlockDriverState *bs,
+ VmdkExtent *extent,
+ VmdkMetaData *m_data,
+ uint64_t offset,
+ bool allocate,
+ uint64_t *cluster_offset,
+ uint64_t skip_start_sector,
+ uint64_t skip_end_sector)
+{
+ unsigned int l1_index, l2_offset, l2_index;
+ int min_index, i, j;
+ uint32_t min_count, *l2_table;
+ bool zeroed = false;
+ int64_t ret;
+ int64_t cluster_sector;
+
+ if (m_data) {
+ m_data->valid = 0;
+ }
+ if (extent->flat) {
+ *cluster_offset = extent->flat_start_offset;
+ return VMDK_OK;
+ }
+
+ offset -= (extent->end_sector - extent->sectors) * SECTOR_SIZE;
+ l1_index = (offset >> 9) / extent->l1_entry_sectors;
+ if (l1_index >= extent->l1_size) {
+ return VMDK_ERROR;
+ }
+ l2_offset = extent->l1_table[l1_index];
+ if (!l2_offset) {
+ return VMDK_UNALLOC;
+ }
+ for (i = 0; i < L2_CACHE_SIZE; i++) {
+ if (l2_offset == extent->l2_cache_offsets[i]) {
+ /* increment the hit count */
+ if (++extent->l2_cache_counts[i] == 0xffffffff) {
+ for (j = 0; j < L2_CACHE_SIZE; j++) {
+ extent->l2_cache_counts[j] >>= 1;
+ }
+ }
+ l2_table = extent->l2_cache + (i * extent->l2_size);
+ goto found;
+ }
+ }
+ /* not found: load a new entry in the least used one */
+ min_index = 0;
+ min_count = 0xffffffff;
+ for (i = 0; i < L2_CACHE_SIZE; i++) {
+ if (extent->l2_cache_counts[i] < min_count) {
+ min_count = extent->l2_cache_counts[i];
+ min_index = i;
+ }
+ }
+ l2_table = extent->l2_cache + (min_index * extent->l2_size);
+ if (bdrv_pread(
+ extent->file,
+ (int64_t)l2_offset * 512,
+ l2_table,
+ extent->l2_size * sizeof(uint32_t)
+ ) != extent->l2_size * sizeof(uint32_t)) {
+ return VMDK_ERROR;
+ }
+
+ extent->l2_cache_offsets[min_index] = l2_offset;
+ extent->l2_cache_counts[min_index] = 1;
+ found:
+ l2_index = ((offset >> 9) / extent->cluster_sectors) % extent->l2_size;
+ cluster_sector = le32_to_cpu(l2_table[l2_index]);
+
+ if (m_data) {
+ m_data->valid = 1;
+ m_data->l1_index = l1_index;
+ m_data->l2_index = l2_index;
+ m_data->l2_offset = l2_offset;
+ m_data->l2_cache_entry = &l2_table[l2_index];
+ }
+ if (extent->has_zero_grain && cluster_sector == VMDK_GTE_ZEROED) {
+ zeroed = true;
+ }
+
+ if (!cluster_sector || zeroed) {
+ if (!allocate) {
+ return zeroed ? VMDK_ZEROED : VMDK_UNALLOC;
+ }
+
+ cluster_sector = extent->next_cluster_sector;
+ extent->next_cluster_sector += extent->cluster_sectors;
+
+ /* First of all we write grain itself, to avoid race condition
+ * that may to corrupt the image.
+ * This problem may occur because of insufficient space on host disk
+ * or inappropriate VM shutdown.
+ */
+ ret = get_whole_cluster(bs, extent,
+ cluster_sector,
+ offset >> BDRV_SECTOR_BITS,
+ skip_start_sector, skip_end_sector);
+ if (ret) {
+ return ret;
+ }
+ }
+ *cluster_offset = cluster_sector << BDRV_SECTOR_BITS;
+ return VMDK_OK;
+}
+
+static VmdkExtent *find_extent(BDRVVmdkState *s,
+ int64_t sector_num, VmdkExtent *start_hint)
+{
+ VmdkExtent *extent = start_hint;
+
+ if (!extent) {
+ extent = &s->extents[0];
+ }
+ while (extent < &s->extents[s->num_extents]) {
+ if (sector_num < extent->end_sector) {
+ return extent;
+ }
+ extent++;
+ }
+ return NULL;
+}
+
+static inline uint64_t vmdk_find_index_in_cluster(VmdkExtent *extent,
+ int64_t sector_num)
+{
+ uint64_t index_in_cluster, extent_begin_sector, extent_relative_sector_num;
+
+ extent_begin_sector = extent->end_sector - extent->sectors;
+ extent_relative_sector_num = sector_num - extent_begin_sector;
+ index_in_cluster = extent_relative_sector_num % extent->cluster_sectors;
+ return index_in_cluster;
+}
+
+static int64_t coroutine_fn vmdk_co_get_block_status(BlockDriverState *bs,
+ int64_t sector_num, int nb_sectors, int *pnum)
+{
+ BDRVVmdkState *s = bs->opaque;
+ int64_t index_in_cluster, n, ret;
+ uint64_t offset;
+ VmdkExtent *extent;
+
+ extent = find_extent(s, sector_num, NULL);
+ if (!extent) {
+ return 0;
+ }
+ qemu_co_mutex_lock(&s->lock);
+ ret = get_cluster_offset(bs, extent, NULL,
+ sector_num * 512, false, &offset,
+ 0, 0);
+ qemu_co_mutex_unlock(&s->lock);
+
+ switch (ret) {
+ case VMDK_ERROR:
+ ret = -EIO;
+ break;
+ case VMDK_UNALLOC:
+ ret = 0;
+ break;
+ case VMDK_ZEROED:
+ ret = BDRV_BLOCK_ZERO;
+ break;
+ case VMDK_OK:
+ ret = BDRV_BLOCK_DATA;
+ if (extent->file == bs->file && !extent->compressed) {
+ ret |= BDRV_BLOCK_OFFSET_VALID | offset;
+ }
+
+ break;
+ }
+
+ index_in_cluster = vmdk_find_index_in_cluster(extent, sector_num);
+ n = extent->cluster_sectors - index_in_cluster;
+ if (n > nb_sectors) {
+ n = nb_sectors;
+ }
+ *pnum = n;
+ return ret;
+}
+
+static int vmdk_write_extent(VmdkExtent *extent, int64_t cluster_offset,
+ int64_t offset_in_cluster, const uint8_t *buf,
+ int nb_sectors, int64_t sector_num)
+{
+ int ret;
+ VmdkGrainMarker *data = NULL;
+ uLongf buf_len;
+ const uint8_t *write_buf = buf;
+ int write_len = nb_sectors * 512;
+ int64_t write_offset;
+ int64_t write_end_sector;
+
+ if (extent->compressed) {
+ if (!extent->has_marker) {
+ ret = -EINVAL;
+ goto out;
+ }
+ buf_len = (extent->cluster_sectors << 9) * 2;
+ data = g_malloc(buf_len + sizeof(VmdkGrainMarker));
+ if (compress(data->data, &buf_len, buf, nb_sectors << 9) != Z_OK ||
+ buf_len == 0) {
+ ret = -EINVAL;
+ goto out;
+ }
+ data->lba = sector_num;
+ data->size = buf_len;
+ write_buf = (uint8_t *)data;
+ write_len = buf_len + sizeof(VmdkGrainMarker);
+ }
+ write_offset = cluster_offset + offset_in_cluster,
+ ret = bdrv_pwrite(extent->file, write_offset, write_buf, write_len);
+
+ write_end_sector = DIV_ROUND_UP(write_offset + write_len, BDRV_SECTOR_SIZE);
+
+ extent->next_cluster_sector = MAX(extent->next_cluster_sector,
+ write_end_sector);
+
+ if (ret != write_len) {
+ ret = ret < 0 ? ret : -EIO;
+ goto out;
+ }
+ ret = 0;
+ out:
+ g_free(data);
+ return ret;
+}
+
+static int vmdk_read_extent(VmdkExtent *extent, int64_t cluster_offset,
+ int64_t offset_in_cluster, uint8_t *buf,
+ int nb_sectors)
+{
+ int ret;
+ int cluster_bytes, buf_bytes;
+ uint8_t *cluster_buf, *compressed_data;
+ uint8_t *uncomp_buf;
+ uint32_t data_len;
+ VmdkGrainMarker *marker;
+ uLongf buf_len;
+
+
+ if (!extent->compressed) {
+ ret = bdrv_pread(extent->file,
+ cluster_offset + offset_in_cluster,
+ buf, nb_sectors * 512);
+ if (ret == nb_sectors * 512) {
+ return 0;
+ } else {
+ return -EIO;
+ }
+ }
+ cluster_bytes = extent->cluster_sectors * 512;
+ /* Read two clusters in case GrainMarker + compressed data > one cluster */
+ buf_bytes = cluster_bytes * 2;
+ cluster_buf = g_malloc(buf_bytes);
+ uncomp_buf = g_malloc(cluster_bytes);
+ ret = bdrv_pread(extent->file,
+ cluster_offset,
+ cluster_buf, buf_bytes);
+ if (ret < 0) {
+ goto out;
+ }
+ compressed_data = cluster_buf;
+ buf_len = cluster_bytes;
+ data_len = cluster_bytes;
+ if (extent->has_marker) {
+ marker = (VmdkGrainMarker *)cluster_buf;
+ compressed_data = marker->data;
+ data_len = le32_to_cpu(marker->size);
+ }
+ if (!data_len || data_len > buf_bytes) {
+ ret = -EINVAL;
+ goto out;
+ }
+ ret = uncompress(uncomp_buf, &buf_len, compressed_data, data_len);
+ if (ret != Z_OK) {
+ ret = -EINVAL;
+ goto out;
+
+ }
+ if (offset_in_cluster < 0 ||
+ offset_in_cluster + nb_sectors * 512 > buf_len) {
+ ret = -EINVAL;
+ goto out;
+ }
+ memcpy(buf, uncomp_buf + offset_in_cluster, nb_sectors * 512);
+ ret = 0;
+
+ out:
+ g_free(uncomp_buf);
+ g_free(cluster_buf);
+ return ret;
+}
+
+static int vmdk_read(BlockDriverState *bs, int64_t sector_num,
+ uint8_t *buf, int nb_sectors)
+{
+ BDRVVmdkState *s = bs->opaque;
+ int ret;
+ uint64_t n, index_in_cluster;
+ VmdkExtent *extent = NULL;
+ uint64_t cluster_offset;
+
+ while (nb_sectors > 0) {
+ extent = find_extent(s, sector_num, extent);
+ if (!extent) {
+ return -EIO;
+ }
+ ret = get_cluster_offset(bs, extent, NULL,
+ sector_num << 9, false, &cluster_offset,
+ 0, 0);
+ index_in_cluster = vmdk_find_index_in_cluster(extent, sector_num);
+ n = extent->cluster_sectors - index_in_cluster;
+ if (n > nb_sectors) {
+ n = nb_sectors;
+ }
+ if (ret != VMDK_OK) {
+ /* if not allocated, try to read from parent image, if exist */
+ if (bs->backing_hd && ret != VMDK_ZEROED) {
+ if (!vmdk_is_cid_valid(bs)) {
+ return -EINVAL;
+ }
+ ret = bdrv_read(bs->backing_hd, sector_num, buf, n);
+ if (ret < 0) {
+ return ret;
+ }
+ } else {
+ memset(buf, 0, 512 * n);
+ }
+ } else {
+ ret = vmdk_read_extent(extent,
+ cluster_offset, index_in_cluster * 512,
+ buf, n);
+ if (ret) {
+ return ret;
+ }
+ }
+ nb_sectors -= n;
+ sector_num += n;
+ buf += n * 512;
+ }
+ return 0;
+}
+
+static coroutine_fn int vmdk_co_read(BlockDriverState *bs, int64_t sector_num,
+ uint8_t *buf, int nb_sectors)
+{
+ int ret;
+ BDRVVmdkState *s = bs->opaque;
+ qemu_co_mutex_lock(&s->lock);
+ ret = vmdk_read(bs, sector_num, buf, nb_sectors);
+ qemu_co_mutex_unlock(&s->lock);
+ return ret;
+}
+
+/**
+ * vmdk_write:
+ * @zeroed: buf is ignored (data is zero), use zeroed_grain GTE feature
+ * if possible, otherwise return -ENOTSUP.
+ * @zero_dry_run: used for zeroed == true only, don't update L2 table, just try
+ * with each cluster. By dry run we can find if the zero write
+ * is possible without modifying image data.
+ *
+ * Returns: error code with 0 for success.
+ */
+static int vmdk_write(BlockDriverState *bs, int64_t sector_num,
+ const uint8_t *buf, int nb_sectors,
+ bool zeroed, bool zero_dry_run)
+{
+ BDRVVmdkState *s = bs->opaque;
+ VmdkExtent *extent = NULL;
+ int ret;
+ int64_t index_in_cluster, n;
+ uint64_t cluster_offset;
+ VmdkMetaData m_data;
+
+ if (sector_num > bs->total_sectors) {
+ error_report("Wrong offset: sector_num=0x%" PRIx64
+ " total_sectors=0x%" PRIx64 "\n",
+ sector_num, bs->total_sectors);
+ return -EIO;
+ }
+
+ while (nb_sectors > 0) {
+ extent = find_extent(s, sector_num, extent);
+ if (!extent) {
+ return -EIO;
+ }
+ index_in_cluster = vmdk_find_index_in_cluster(extent, sector_num);
+ n = extent->cluster_sectors - index_in_cluster;
+ if (n > nb_sectors) {
+ n = nb_sectors;
+ }
+ ret = get_cluster_offset(bs, extent, &m_data, sector_num << 9,
+ !(extent->compressed || zeroed),
+ &cluster_offset,
+ index_in_cluster, index_in_cluster + n);
+ if (extent->compressed) {
+ if (ret == VMDK_OK) {
+ /* Refuse write to allocated cluster for streamOptimized */
+ error_report("Could not write to allocated cluster"
+ " for streamOptimized");
+ return -EIO;
+ } else {
+ /* allocate */
+ ret = get_cluster_offset(bs, extent, &m_data, sector_num << 9,
+ true, &cluster_offset, 0, 0);
+ }
+ }
+ if (ret == VMDK_ERROR) {
+ return -EINVAL;
+ }
+ if (zeroed) {
+ /* Do zeroed write, buf is ignored */
+ if (extent->has_zero_grain &&
+ index_in_cluster == 0 &&
+ n >= extent->cluster_sectors) {
+ n = extent->cluster_sectors;
+ if (!zero_dry_run) {
+ /* update L2 tables */
+ if (vmdk_L2update(extent, &m_data, VMDK_GTE_ZEROED)
+ != VMDK_OK) {
+ return -EIO;
+ }
+ }
+ } else {
+ return -ENOTSUP;
+ }
+ } else {
+ ret = vmdk_write_extent(extent,
+ cluster_offset, index_in_cluster * 512,
+ buf, n, sector_num);
+ if (ret) {
+ return ret;
+ }
+ if (m_data.valid) {
+ /* update L2 tables */
+ if (vmdk_L2update(extent, &m_data,
+ cluster_offset >> BDRV_SECTOR_BITS)
+ != VMDK_OK) {
+ return -EIO;
+ }
+ }
+ }
+ nb_sectors -= n;
+ sector_num += n;
+ buf += n * 512;
+
+ /* update CID on the first write every time the virtual disk is
+ * opened */
+ if (!s->cid_updated) {
+ ret = vmdk_write_cid(bs, g_random_int());
+ if (ret < 0) {
+ return ret;
+ }
+ s->cid_updated = true;
+ }
+ }
+ return 0;
+}
+
+static coroutine_fn int vmdk_co_write(BlockDriverState *bs, int64_t sector_num,
+ const uint8_t *buf, int nb_sectors)
+{
+ int ret;
+ BDRVVmdkState *s = bs->opaque;
+ qemu_co_mutex_lock(&s->lock);
+ ret = vmdk_write(bs, sector_num, buf, nb_sectors, false, false);
+ qemu_co_mutex_unlock(&s->lock);
+ return ret;
+}
+
+static int vmdk_write_compressed(BlockDriverState *bs,
+ int64_t sector_num,
+ const uint8_t *buf,
+ int nb_sectors)
+{
+ BDRVVmdkState *s = bs->opaque;
+ if (s->num_extents == 1 && s->extents[0].compressed) {
+ return vmdk_write(bs, sector_num, buf, nb_sectors, false, false);
+ } else {
+ return -ENOTSUP;
+ }
+}
+
+static int coroutine_fn vmdk_co_write_zeroes(BlockDriverState *bs,
+ int64_t sector_num,
+ int nb_sectors,
+ BdrvRequestFlags flags)
+{
+ int ret;
+ BDRVVmdkState *s = bs->opaque;
+ qemu_co_mutex_lock(&s->lock);
+ /* write zeroes could fail if sectors not aligned to cluster, test it with
+ * dry_run == true before really updating image */
+ ret = vmdk_write(bs, sector_num, NULL, nb_sectors, true, true);
+ if (!ret) {
+ ret = vmdk_write(bs, sector_num, NULL, nb_sectors, true, false);
+ }
+ qemu_co_mutex_unlock(&s->lock);
+ return ret;
+}
+
+static int vmdk_create_extent(const char *filename, int64_t filesize,
+ bool flat, bool compress, bool zeroed_grain,
+ QemuOpts *opts, Error **errp)
+{
+ int ret, i;
+ BlockDriverState *bs = NULL;
+ VMDK4Header header;
+ Error *local_err = NULL;
+ uint32_t tmp, magic, grains, gd_sectors, gt_size, gt_count;
+ uint32_t *gd_buf = NULL;
+ int gd_buf_size;
+
+ ret = bdrv_create_file(filename, opts, &local_err);
+ if (ret < 0) {
+ error_propagate(errp, local_err);
+ goto exit;
+ }
+
+ assert(bs == NULL);
+ ret = bdrv_open(&bs, filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_PROTOCOL,
+ NULL, &local_err);
+ if (ret < 0) {
+ error_propagate(errp, local_err);
+ goto exit;
+ }
+
+ if (flat) {
+ ret = bdrv_truncate(bs, filesize);
+ if (ret < 0) {
+ error_setg_errno(errp, -ret, "Could not truncate file");
+ }
+ goto exit;
+ }
+ magic = cpu_to_be32(VMDK4_MAGIC);
+ memset(&header, 0, sizeof(header));
+ header.version = zeroed_grain ? 2 : 1;
+ header.flags = VMDK4_FLAG_RGD | VMDK4_FLAG_NL_DETECT
+ | (compress ? VMDK4_FLAG_COMPRESS | VMDK4_FLAG_MARKER : 0)
+ | (zeroed_grain ? VMDK4_FLAG_ZERO_GRAIN : 0);
+ header.compressAlgorithm = compress ? VMDK4_COMPRESSION_DEFLATE : 0;
+ header.capacity = filesize / BDRV_SECTOR_SIZE;
+ header.granularity = 128;
+ header.num_gtes_per_gt = BDRV_SECTOR_SIZE;
+
+ grains = DIV_ROUND_UP(filesize / BDRV_SECTOR_SIZE, header.granularity);
+ gt_size = DIV_ROUND_UP(header.num_gtes_per_gt * sizeof(uint32_t),
+ BDRV_SECTOR_SIZE);
+ gt_count = DIV_ROUND_UP(grains, header.num_gtes_per_gt);
+ gd_sectors = DIV_ROUND_UP(gt_count * sizeof(uint32_t), BDRV_SECTOR_SIZE);
+
+ header.desc_offset = 1;
+ header.desc_size = 20;
+ header.rgd_offset = header.desc_offset + header.desc_size;
+ header.gd_offset = header.rgd_offset + gd_sectors + (gt_size * gt_count);
+ header.grain_offset =
+ ROUND_UP(header.gd_offset + gd_sectors + (gt_size * gt_count),
+ header.granularity);
+ /* swap endianness for all header fields */
+ header.version = cpu_to_le32(header.version);
+ header.flags = cpu_to_le32(header.flags);
+ header.capacity = cpu_to_le64(header.capacity);
+ header.granularity = cpu_to_le64(header.granularity);
+ header.num_gtes_per_gt = cpu_to_le32(header.num_gtes_per_gt);
+ header.desc_offset = cpu_to_le64(header.desc_offset);
+ header.desc_size = cpu_to_le64(header.desc_size);
+ header.rgd_offset = cpu_to_le64(header.rgd_offset);
+ header.gd_offset = cpu_to_le64(header.gd_offset);
+ header.grain_offset = cpu_to_le64(header.grain_offset);
+ header.compressAlgorithm = cpu_to_le16(header.compressAlgorithm);
+
+ header.check_bytes[0] = 0xa;
+ header.check_bytes[1] = 0x20;
+ header.check_bytes[2] = 0xd;
+ header.check_bytes[3] = 0xa;
+
+ /* write all the data */
+ ret = bdrv_pwrite(bs, 0, &magic, sizeof(magic));
+ if (ret < 0) {
+ error_setg(errp, QERR_IO_ERROR);
+ goto exit;
+ }
+ ret = bdrv_pwrite(bs, sizeof(magic), &header, sizeof(header));
+ if (ret < 0) {
+ error_setg(errp, QERR_IO_ERROR);
+ goto exit;
+ }
+
+ ret = bdrv_truncate(bs, le64_to_cpu(header.grain_offset) << 9);
+ if (ret < 0) {
+ error_setg_errno(errp, -ret, "Could not truncate file");
+ goto exit;
+ }
+
+ /* write grain directory */
+ gd_buf_size = gd_sectors * BDRV_SECTOR_SIZE;
+ gd_buf = g_malloc0(gd_buf_size);
+ for (i = 0, tmp = le64_to_cpu(header.rgd_offset) + gd_sectors;
+ i < gt_count; i++, tmp += gt_size) {
+ gd_buf[i] = cpu_to_le32(tmp);
+ }
+ ret = bdrv_pwrite(bs, le64_to_cpu(header.rgd_offset) * BDRV_SECTOR_SIZE,
+ gd_buf, gd_buf_size);
+ if (ret < 0) {
+ error_setg(errp, QERR_IO_ERROR);
+ goto exit;
+ }
+
+ /* write backup grain directory */
+ for (i = 0, tmp = le64_to_cpu(header.gd_offset) + gd_sectors;
+ i < gt_count; i++, tmp += gt_size) {
+ gd_buf[i] = cpu_to_le32(tmp);
+ }
+ ret = bdrv_pwrite(bs, le64_to_cpu(header.gd_offset) * BDRV_SECTOR_SIZE,
+ gd_buf, gd_buf_size);
+ if (ret < 0) {
+ error_setg(errp, QERR_IO_ERROR);
+ goto exit;
+ }
+
+ ret = 0;
+exit:
+ if (bs) {
+ bdrv_unref(bs);
+ }
+ g_free(gd_buf);
+ return ret;
+}
+
+static int filename_decompose(const char *filename, char *path, char *prefix,
+ char *postfix, size_t buf_len, Error **errp)
+{
+ const char *p, *q;
+
+ if (filename == NULL || !strlen(filename)) {
+ error_setg(errp, "No filename provided");
+ return VMDK_ERROR;
+ }
+ p = strrchr(filename, '/');
+ if (p == NULL) {
+ p = strrchr(filename, '\\');
+ }
+ if (p == NULL) {
+ p = strrchr(filename, ':');
+ }
+ if (p != NULL) {
+ p++;
+ if (p - filename >= buf_len) {
+ return VMDK_ERROR;
+ }
+ pstrcpy(path, p - filename + 1, filename);
+ } else {
+ p = filename;
+ path[0] = '\0';
+ }
+ q = strrchr(p, '.');
+ if (q == NULL) {
+ pstrcpy(prefix, buf_len, p);
+ postfix[0] = '\0';
+ } else {
+ if (q - p >= buf_len) {
+ return VMDK_ERROR;
+ }
+ pstrcpy(prefix, q - p + 1, p);
+ pstrcpy(postfix, buf_len, q);
+ }
+ return VMDK_OK;
+}
+
+static int vmdk_create(const char *filename, QemuOpts *opts, Error **errp)
+{
+ int idx = 0;
+ BlockDriverState *new_bs = NULL;
+ Error *local_err = NULL;
+ char *desc = NULL;
+ int64_t total_size = 0, filesize;
+ char *adapter_type = NULL;
+ char *backing_file = NULL;
+ char *fmt = NULL;
+ int flags = 0;
+ int ret = 0;
+ bool flat, split, compress;
+ GString *ext_desc_lines;
+ char *path = g_malloc0(PATH_MAX);
+ char *prefix = g_malloc0(PATH_MAX);
+ char *postfix = g_malloc0(PATH_MAX);
+ char *desc_line = g_malloc0(BUF_SIZE);
+ char *ext_filename = g_malloc0(PATH_MAX);
+ char *desc_filename = g_malloc0(PATH_MAX);
+ const int64_t split_size = 0x80000000; /* VMDK has constant split size */
+ const char *desc_extent_line;
+ char *parent_desc_line = g_malloc0(BUF_SIZE);
+ uint32_t parent_cid = 0xffffffff;
+ uint32_t number_heads = 16;
+ bool zeroed_grain = false;
+ uint32_t desc_offset = 0, desc_len;
+ const char desc_template[] =
+ "# Disk DescriptorFile\n"
+ "version=1\n"
+ "CID=%" PRIx32 "\n"
+ "parentCID=%" PRIx32 "\n"
+ "createType=\"%s\"\n"
+ "%s"
+ "\n"
+ "# Extent description\n"
+ "%s"
+ "\n"
+ "# The Disk Data Base\n"
+ "#DDB\n"
+ "\n"
+ "ddb.virtualHWVersion = \"%d\"\n"
+ "ddb.geometry.cylinders = \"%" PRId64 "\"\n"
+ "ddb.geometry.heads = \"%" PRIu32 "\"\n"
+ "ddb.geometry.sectors = \"63\"\n"
+ "ddb.adapterType = \"%s\"\n";
+
+ ext_desc_lines = g_string_new(NULL);
+
+ if (filename_decompose(filename, path, prefix, postfix, PATH_MAX, errp)) {
+ ret = -EINVAL;
+ goto exit;
+ }
+ /* Read out options */
+ total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
+ BDRV_SECTOR_SIZE);
+ adapter_type = qemu_opt_get_del(opts, BLOCK_OPT_ADAPTER_TYPE);
+ backing_file = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FILE);
+ if (qemu_opt_get_bool_del(opts, BLOCK_OPT_COMPAT6, false)) {
+ flags |= BLOCK_FLAG_COMPAT6;
+ }
+ fmt = qemu_opt_get_del(opts, BLOCK_OPT_SUBFMT);
+ if (qemu_opt_get_bool_del(opts, BLOCK_OPT_ZEROED_GRAIN, false)) {
+ zeroed_grain = true;
+ }
+
+ if (!adapter_type) {
+ adapter_type = g_strdup("ide");
+ } else if (strcmp(adapter_type, "ide") &&
+ strcmp(adapter_type, "buslogic") &&
+ strcmp(adapter_type, "lsilogic") &&
+ strcmp(adapter_type, "legacyESX")) {
+ error_setg(errp, "Unknown adapter type: '%s'", adapter_type);
+ ret = -EINVAL;
+ goto exit;
+ }
+ if (strcmp(adapter_type, "ide") != 0) {
+ /* that's the number of heads with which vmware operates when
+ creating, exporting, etc. vmdk files with a non-ide adapter type */
+ number_heads = 255;
+ }
+ if (!fmt) {
+ /* Default format to monolithicSparse */
+ fmt = g_strdup("monolithicSparse");
+ } else if (strcmp(fmt, "monolithicFlat") &&
+ strcmp(fmt, "monolithicSparse") &&
+ strcmp(fmt, "twoGbMaxExtentSparse") &&
+ strcmp(fmt, "twoGbMaxExtentFlat") &&
+ strcmp(fmt, "streamOptimized")) {
+ error_setg(errp, "Unknown subformat: '%s'", fmt);
+ ret = -EINVAL;
+ goto exit;
+ }
+ split = !(strcmp(fmt, "twoGbMaxExtentFlat") &&
+ strcmp(fmt, "twoGbMaxExtentSparse"));
+ flat = !(strcmp(fmt, "monolithicFlat") &&
+ strcmp(fmt, "twoGbMaxExtentFlat"));
+ compress = !strcmp(fmt, "streamOptimized");
+ if (flat) {
+ desc_extent_line = "RW %" PRId64 " FLAT \"%s\" 0\n";
+ } else {
+ desc_extent_line = "RW %" PRId64 " SPARSE \"%s\"\n";
+ }
+ if (flat && backing_file) {
+ error_setg(errp, "Flat image can't have backing file");
+ ret = -ENOTSUP;
+ goto exit;
+ }
+ if (flat && zeroed_grain) {
+ error_setg(errp, "Flat image can't enable zeroed grain");
+ ret = -ENOTSUP;
+ goto exit;
+ }
+ if (backing_file) {
+ BlockDriverState *bs = NULL;
+ char *full_backing = g_new0(char, PATH_MAX);
+ bdrv_get_full_backing_filename_from_filename(filename, backing_file,
+ full_backing, PATH_MAX,
+ &local_err);
+ if (local_err) {
+ g_free(full_backing);
+ error_propagate(errp, local_err);
+ ret = -ENOENT;
+ goto exit;
+ }
+ ret = bdrv_open(&bs, full_backing, NULL, NULL, BDRV_O_NO_BACKING, NULL,
+ errp);
+ g_free(full_backing);
+ if (ret != 0) {
+ goto exit;
+ }
+ if (strcmp(bs->drv->format_name, "vmdk")) {
+ bdrv_unref(bs);
+ ret = -EINVAL;
+ goto exit;
+ }
+ parent_cid = vmdk_read_cid(bs, 0);
+ bdrv_unref(bs);
+ snprintf(parent_desc_line, BUF_SIZE,
+ "parentFileNameHint=\"%s\"", backing_file);
+ }
+
+ /* Create extents */
+ filesize = total_size;
+ while (filesize > 0) {
+ int64_t size = filesize;
+
+ if (split && size > split_size) {
+ size = split_size;
+ }
+ if (split) {
+ snprintf(desc_filename, PATH_MAX, "%s-%c%03d%s",
+ prefix, flat ? 'f' : 's', ++idx, postfix);
+ } else if (flat) {
+ snprintf(desc_filename, PATH_MAX, "%s-flat%s", prefix, postfix);
+ } else {
+ snprintf(desc_filename, PATH_MAX, "%s%s", prefix, postfix);
+ }
+ snprintf(ext_filename, PATH_MAX, "%s%s", path, desc_filename);
+
+ if (vmdk_create_extent(ext_filename, size,
+ flat, compress, zeroed_grain, opts, errp)) {
+ ret = -EINVAL;
+ goto exit;
+ }
+ filesize -= size;
+
+ /* Format description line */
+ snprintf(desc_line, BUF_SIZE,
+ desc_extent_line, size / BDRV_SECTOR_SIZE, desc_filename);
+ g_string_append(ext_desc_lines, desc_line);
+ }
+ /* generate descriptor file */
+ desc = g_strdup_printf(desc_template,
+ g_random_int(),
+ parent_cid,
+ fmt,
+ parent_desc_line,
+ ext_desc_lines->str,
+ (flags & BLOCK_FLAG_COMPAT6 ? 6 : 4),
+ total_size /
+ (int64_t)(63 * number_heads * BDRV_SECTOR_SIZE),
+ number_heads,
+ adapter_type);
+ desc_len = strlen(desc);
+ /* the descriptor offset = 0x200 */
+ if (!split && !flat) {
+ desc_offset = 0x200;
+ } else {
+ ret = bdrv_create_file(filename, opts, &local_err);
+ if (ret < 0) {
+ error_propagate(errp, local_err);
+ goto exit;
+ }
+ }
+ assert(new_bs == NULL);
+ ret = bdrv_open(&new_bs, filename, NULL, NULL,
+ BDRV_O_RDWR | BDRV_O_PROTOCOL, NULL, &local_err);
+ if (ret < 0) {
+ error_propagate(errp, local_err);
+ goto exit;
+ }
+ ret = bdrv_pwrite(new_bs, desc_offset, desc, desc_len);
+ if (ret < 0) {
+ error_setg_errno(errp, -ret, "Could not write description");
+ goto exit;
+ }
+ /* bdrv_pwrite write padding zeros to align to sector, we don't need that
+ * for description file */
+ if (desc_offset == 0) {
+ ret = bdrv_truncate(new_bs, desc_len);
+ if (ret < 0) {
+ error_setg_errno(errp, -ret, "Could not truncate file");
+ }
+ }
+exit:
+ if (new_bs) {
+ bdrv_unref(new_bs);
+ }
+ g_free(adapter_type);
+ g_free(backing_file);
+ g_free(fmt);
+ g_free(desc);
+ g_free(path);
+ g_free(prefix);
+ g_free(postfix);
+ g_free(desc_line);
+ g_free(ext_filename);
+ g_free(desc_filename);
+ g_free(parent_desc_line);
+ g_string_free(ext_desc_lines, true);
+ return ret;
+}
+
+static void vmdk_close(BlockDriverState *bs)
+{
+ BDRVVmdkState *s = bs->opaque;
+
+ vmdk_free_extents(bs);
+ g_free(s->create_type);
+
+ migrate_del_blocker(s->migration_blocker);
+ error_free(s->migration_blocker);
+}
+
+static coroutine_fn int vmdk_co_flush(BlockDriverState *bs)
+{
+ BDRVVmdkState *s = bs->opaque;
+ int i, err;
+ int ret = 0;
+
+ for (i = 0; i < s->num_extents; i++) {
+ err = bdrv_co_flush(s->extents[i].file);
+ if (err < 0) {
+ ret = err;
+ }
+ }
+ return ret;
+}
+
+static int64_t vmdk_get_allocated_file_size(BlockDriverState *bs)
+{
+ int i;
+ int64_t ret = 0;
+ int64_t r;
+ BDRVVmdkState *s = bs->opaque;
+
+ ret = bdrv_get_allocated_file_size(bs->file);
+ if (ret < 0) {
+ return ret;
+ }
+ for (i = 0; i < s->num_extents; i++) {
+ if (s->extents[i].file == bs->file) {
+ continue;
+ }
+ r = bdrv_get_allocated_file_size(s->extents[i].file);
+ if (r < 0) {
+ return r;
+ }
+ ret += r;
+ }
+ return ret;
+}
+
+static int vmdk_has_zero_init(BlockDriverState *bs)
+{
+ int i;
+ BDRVVmdkState *s = bs->opaque;
+
+ /* If has a flat extent and its underlying storage doesn't have zero init,
+ * return 0. */
+ for (i = 0; i < s->num_extents; i++) {
+ if (s->extents[i].flat) {
+ if (!bdrv_has_zero_init(s->extents[i].file)) {
+ return 0;
+ }
+ }
+ }
+ return 1;
+}
+
+static ImageInfo *vmdk_get_extent_info(VmdkExtent *extent)
+{
+ ImageInfo *info = g_new0(ImageInfo, 1);
+
+ *info = (ImageInfo){
+ .filename = g_strdup(extent->file->filename),
+ .format = g_strdup(extent->type),
+ .virtual_size = extent->sectors * BDRV_SECTOR_SIZE,
+ .compressed = extent->compressed,
+ .has_compressed = extent->compressed,
+ .cluster_size = extent->cluster_sectors * BDRV_SECTOR_SIZE,
+ .has_cluster_size = !extent->flat,
+ };
+
+ return info;
+}
+
+static int vmdk_check(BlockDriverState *bs, BdrvCheckResult *result,
+ BdrvCheckMode fix)
+{
+ BDRVVmdkState *s = bs->opaque;
+ VmdkExtent *extent = NULL;
+ int64_t sector_num = 0;
+ int64_t total_sectors = bdrv_nb_sectors(bs);
+ int ret;
+ uint64_t cluster_offset;
+
+ if (fix) {
+ return -ENOTSUP;
+ }
+
+ for (;;) {
+ if (sector_num >= total_sectors) {
+ return 0;
+ }
+ extent = find_extent(s, sector_num, extent);
+ if (!extent) {
+ fprintf(stderr,
+ "ERROR: could not find extent for sector %" PRId64 "\n",
+ sector_num);
+ break;
+ }
+ ret = get_cluster_offset(bs, extent, NULL,
+ sector_num << BDRV_SECTOR_BITS,
+ false, &cluster_offset, 0, 0);
+ if (ret == VMDK_ERROR) {
+ fprintf(stderr,
+ "ERROR: could not get cluster_offset for sector %"
+ PRId64 "\n", sector_num);
+ break;
+ }
+ if (ret == VMDK_OK && cluster_offset >= bdrv_getlength(extent->file)) {
+ fprintf(stderr,
+ "ERROR: cluster offset for sector %"
+ PRId64 " points after EOF\n", sector_num);
+ break;
+ }
+ sector_num += extent->cluster_sectors;
+ }
+
+ result->corruptions++;
+ return 0;
+}
+
+static ImageInfoSpecific *vmdk_get_specific_info(BlockDriverState *bs)
+{
+ int i;
+ BDRVVmdkState *s = bs->opaque;
+ ImageInfoSpecific *spec_info = g_new0(ImageInfoSpecific, 1);
+ ImageInfoList **next;
+
+ *spec_info = (ImageInfoSpecific){
+ .kind = IMAGE_INFO_SPECIFIC_KIND_VMDK,
+ {
+ .vmdk = g_new0(ImageInfoSpecificVmdk, 1),
+ },
+ };
+
+ *spec_info->vmdk = (ImageInfoSpecificVmdk) {
+ .create_type = g_strdup(s->create_type),
+ .cid = s->cid,
+ .parent_cid = s->parent_cid,
+ };
+
+ next = &spec_info->vmdk->extents;
+ for (i = 0; i < s->num_extents; i++) {
+ *next = g_new0(ImageInfoList, 1);
+ (*next)->value = vmdk_get_extent_info(&s->extents[i]);
+ (*next)->next = NULL;
+ next = &(*next)->next;
+ }
+
+ return spec_info;
+}
+
+static bool vmdk_extents_type_eq(const VmdkExtent *a, const VmdkExtent *b)
+{
+ return a->flat == b->flat &&
+ a->compressed == b->compressed &&
+ (a->flat || a->cluster_sectors == b->cluster_sectors);
+}
+
+static int vmdk_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
+{
+ int i;
+ BDRVVmdkState *s = bs->opaque;
+ assert(s->num_extents);
+
+ /* See if we have multiple extents but they have different cases */
+ for (i = 1; i < s->num_extents; i++) {
+ if (!vmdk_extents_type_eq(&s->extents[0], &s->extents[i])) {
+ return -ENOTSUP;
+ }
+ }
+ bdi->needs_compressed_writes = s->extents[0].compressed;
+ if (!s->extents[0].flat) {
+ bdi->cluster_size = s->extents[0].cluster_sectors << BDRV_SECTOR_BITS;
+ }
+ return 0;
+}
+
+static void vmdk_detach_aio_context(BlockDriverState *bs)
+{
+ BDRVVmdkState *s = bs->opaque;
+ int i;
+
+ for (i = 0; i < s->num_extents; i++) {
+ bdrv_detach_aio_context(s->extents[i].file);
+ }
+}
+
+static void vmdk_attach_aio_context(BlockDriverState *bs,
+ AioContext *new_context)
+{
+ BDRVVmdkState *s = bs->opaque;
+ int i;
+
+ for (i = 0; i < s->num_extents; i++) {
+ bdrv_attach_aio_context(s->extents[i].file, new_context);
+ }
+}
+
+static QemuOptsList vmdk_create_opts = {
+ .name = "vmdk-create-opts",
+ .head = QTAILQ_HEAD_INITIALIZER(vmdk_create_opts.head),
+ .desc = {
+ {
+ .name = BLOCK_OPT_SIZE,
+ .type = QEMU_OPT_SIZE,
+ .help = "Virtual disk size"
+ },
+ {
+ .name = BLOCK_OPT_ADAPTER_TYPE,
+ .type = QEMU_OPT_STRING,
+ .help = "Virtual adapter type, can be one of "
+ "ide (default), lsilogic, buslogic or legacyESX"
+ },
+ {
+ .name = BLOCK_OPT_BACKING_FILE,
+ .type = QEMU_OPT_STRING,
+ .help = "File name of a base image"
+ },
+ {
+ .name = BLOCK_OPT_COMPAT6,
+ .type = QEMU_OPT_BOOL,
+ .help = "VMDK version 6 image",
+ .def_value_str = "off"
+ },
+ {
+ .name = BLOCK_OPT_SUBFMT,
+ .type = QEMU_OPT_STRING,
+ .help =
+ "VMDK flat extent format, can be one of "
+ "{monolithicSparse (default) | monolithicFlat | twoGbMaxExtentSparse | twoGbMaxExtentFlat | streamOptimized} "
+ },
+ {
+ .name = BLOCK_OPT_ZEROED_GRAIN,
+ .type = QEMU_OPT_BOOL,
+ .help = "Enable efficient zero writes "
+ "using the zeroed-grain GTE feature"
+ },
+ { /* end of list */ }
+ }
+};
+
+static BlockDriver bdrv_vmdk = {
+ .format_name = "vmdk",
+ .instance_size = sizeof(BDRVVmdkState),
+ .bdrv_probe = vmdk_probe,
+ .bdrv_open = vmdk_open,
+ .bdrv_check = vmdk_check,
+ .bdrv_reopen_prepare = vmdk_reopen_prepare,
+ .bdrv_read = vmdk_co_read,
+ .bdrv_write = vmdk_co_write,
+ .bdrv_write_compressed = vmdk_write_compressed,
+ .bdrv_co_write_zeroes = vmdk_co_write_zeroes,
+ .bdrv_close = vmdk_close,
+ .bdrv_create = vmdk_create,
+ .bdrv_co_flush_to_disk = vmdk_co_flush,
+ .bdrv_co_get_block_status = vmdk_co_get_block_status,
+ .bdrv_get_allocated_file_size = vmdk_get_allocated_file_size,
+ .bdrv_has_zero_init = vmdk_has_zero_init,
+ .bdrv_get_specific_info = vmdk_get_specific_info,
+ .bdrv_refresh_limits = vmdk_refresh_limits,
+ .bdrv_get_info = vmdk_get_info,
+ .bdrv_detach_aio_context = vmdk_detach_aio_context,
+ .bdrv_attach_aio_context = vmdk_attach_aio_context,
+
+ .supports_backing = true,
+ .create_opts = &vmdk_create_opts,
+};
+
+static void bdrv_vmdk_init(void)
+{
+ bdrv_register(&bdrv_vmdk);
+}
+
+block_init(bdrv_vmdk_init);
Code Review / kvmfornfv.git / blobdiff