| /* |
| * 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 "qemu/module.h" |
| #include "migration/migration.h" |
| #include <zlib.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; |
| } |
| |
| /* Queue extents, if any, for reopen() */ |
| static int vmdk_reopen_prepare(BDRVReopenState *state, |
| BlockReopenQueue *queue, Error **errp) |
| { |
| BDRVVmdkState *s; |
| int ret = -1; |
| int i; |
| VmdkExtent *e; |
| |
| assert(state != NULL); |
| assert(state->bs != NULL); |
| |
| if (queue == NULL) { |
| error_setg(errp, "No reopen queue for VMDK extents"); |
| goto exit; |
| } |
| |
| s = state->bs->opaque; |
| |
| assert(s != NULL); |
| |
| for (i = 0; i < s->num_extents; i++) { |
| e = &s->extents[i]; |
| if (e->file != state->bs->file) { |
| bdrv_reopen_queue(queue, e->file, state->flags); |
| } |
| } |
| ret = 0; |
| |
| exit: |
| return ret; |
| } |
| |
| 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; |
| int l1_size, 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), |
| 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, |
| 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; |
| } |
| |
| size = MIN(size, 1 << 20); /* avoid unbounded allocation */ |
| buf = g_malloc0(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; |
| } |
| |
| return buf; |
| } |
| |
| static int vmdk_open_vmdk4(BlockDriverState *bs, |
| BlockDriverState *file, |
| int flags, 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, 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) { |
| 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) |
| { |
| 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_set(errp, QERR_UNKNOWN_BLOCK_FORMAT_FEATURE, |
| bdrv_get_device_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) { |
| 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, 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, 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, Error **errp) |
| { |
| int ret; |
| char access[11]; |
| char type[11]; |
| char fname[512]; |
| const char *p = desc; |
| int64_t sectors = 0; |
| int64_t flat_offset; |
| char extent_path[PATH_MAX]; |
| BlockDriverState *extent_file; |
| BDRVVmdkState *s = bs->opaque; |
| VmdkExtent *extent; |
| |
| while (*p) { |
| /* parse extent line: |
| * RW [size in sectors] FLAT "file-name.vmdk" OFFSET |
| * or |
| * RW [size in sectors] SPARSE "file-name.vmdk" |
| */ |
| flat_offset = -1; |
| ret = sscanf(p, "%10s %" SCNd64 " %10s \"%511[^\n\r\"]\" %" SCNd64, |
| access, §ors, type, fname, &flat_offset); |
| if (ret < 4 || strcmp(access, "RW")) { |
| goto next_line; |
| } else if (!strcmp(type, "FLAT")) { |
| if (ret != 5 || flat_offset < 0) { |
| error_setg(errp, "Invalid extent lines: \n%s", p); |
| return -EINVAL; |
| } |
| } else if (!strcmp(type, "VMFS")) { |
| if (ret == 4) { |
| flat_offset = 0; |
| } else { |
| error_setg(errp, "Invalid extent lines:\n%s", p); |
| return -EINVAL; |
| } |
| } else if (ret != 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; |
| } |
| |
| path_combine(extent_path, sizeof(extent_path), |
| desc_file_path, fname); |
| extent_file = NULL; |
| ret = bdrv_open(&extent_file, extent_path, NULL, NULL, |
| bs->open_flags | BDRV_O_PROTOCOL, NULL, errp); |
| 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, 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, |
| 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->filename, errp); |
| exit: |
| return ret; |
| } |
| |
| static int vmdk_open(BlockDriverState *bs, QDict *options, int flags, |
| Error **errp) |
| { |
| char *buf = NULL; |
| 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, errp); |
| s->desc_offset = 0x200; |
| break; |
| default: |
| ret = vmdk_open_desc_file(bs, flags, buf, 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_set(&s->migration_blocker, |
| QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED, |
| "vmdk", bdrv_get_device_name(bs), "live migration"); |
| 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 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 = sector_num % extent->cluster_sectors; |
| 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; |
| |
| 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); |
| } |
| ret = bdrv_pwrite(extent->file, |
| cluster_offset + offset_in_cluster, |
| write_buf, |
| write_len); |
| 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; |
| uint64_t extent_begin_sector, extent_relative_sector_num; |
| 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); |
| 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; |
| 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 extent_begin_sector, extent_relative_sector_num; |
| 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; |
| } |
| 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; |
| 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, time(NULL)); |
| 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_set(errp, QERR_IO_ERROR); |
| goto exit; |
| } |
| ret = bdrv_pwrite(bs, sizeof(magic), &header, sizeof(header)); |
| if (ret < 0) { |
| error_set(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_set(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_set(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[PATH_MAX], prefix[PATH_MAX], postfix[PATH_MAX]; |
| const int64_t split_size = 0x80000000; /* VMDK has constant split size */ |
| const char *desc_extent_line; |
| char parent_desc_line[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; |
| ret = bdrv_open(&bs, backing_file, NULL, NULL, BDRV_O_NO_BACKING, NULL, |
| errp); |
| 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, sizeof(parent_desc_line), |
| "parentFileNameHint=\"%s\"", backing_file); |
| } |
| |
| /* Create extents */ |
| filesize = total_size; |
| while (filesize > 0) { |
| char desc_line[BUF_SIZE]; |
| char ext_filename[PATH_MAX]; |
| char desc_filename[PATH_MAX]; |
| int64_t size = filesize; |
| |
| if (split && size > split_size) { |
| size = split_size; |
| } |
| if (split) { |
| snprintf(desc_filename, sizeof(desc_filename), "%s-%c%03d%s", |
| prefix, flat ? 'f' : 's', ++idx, postfix); |
| } else if (flat) { |
| snprintf(desc_filename, sizeof(desc_filename), "%s-flat%s", |
| prefix, postfix); |
| } else { |
| snprintf(desc_filename, sizeof(desc_filename), "%s%s", |
| prefix, postfix); |
| } |
| snprintf(ext_filename, sizeof(ext_filename), "%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, sizeof(desc_line), |
| 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, |
| (uint32_t)time(NULL), |
| 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_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); |