| /* |
| * 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/osdep.h" |
| #include "qapi/error.h" |
| #include "block/block_int.h" |
| #include "sysemu/block-backend.h" |
| #include "qapi/qmp/qdict.h" |
| #include "qapi/qmp/qerror.h" |
| #include "qemu/error-report.h" |
| #include "qemu/module.h" |
| #include "qemu/option.h" |
| #include "qemu/bswap.h" |
| #include "migration/blocker.h" |
| #include "qemu/cutils.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_EXTENT_MAX_SECTORS (1ULL << 32) |
| |
| #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; |
| |
| typedef struct VMDKSESparseConstHeader { |
| uint64_t magic; |
| uint64_t version; |
| uint64_t capacity; |
| uint64_t grain_size; |
| uint64_t grain_table_size; |
| uint64_t flags; |
| uint64_t reserved1; |
| uint64_t reserved2; |
| uint64_t reserved3; |
| uint64_t reserved4; |
| uint64_t volatile_header_offset; |
| uint64_t volatile_header_size; |
| uint64_t journal_header_offset; |
| uint64_t journal_header_size; |
| uint64_t journal_offset; |
| uint64_t journal_size; |
| uint64_t grain_dir_offset; |
| uint64_t grain_dir_size; |
| uint64_t grain_tables_offset; |
| uint64_t grain_tables_size; |
| uint64_t free_bitmap_offset; |
| uint64_t free_bitmap_size; |
| uint64_t backmap_offset; |
| uint64_t backmap_size; |
| uint64_t grains_offset; |
| uint64_t grains_size; |
| uint8_t pad[304]; |
| } QEMU_PACKED VMDKSESparseConstHeader; |
| |
| typedef struct VMDKSESparseVolatileHeader { |
| uint64_t magic; |
| uint64_t free_gt_number; |
| uint64_t next_txn_seq_number; |
| uint64_t replay_journal; |
| uint8_t pad[480]; |
| } QEMU_PACKED VMDKSESparseVolatileHeader; |
| |
| #define L2_CACHE_SIZE 16 |
| |
| typedef struct VmdkExtent { |
| BdrvChild *file; |
| bool flat; |
| bool compressed; |
| bool has_marker; |
| bool has_zero_grain; |
| bool sesparse; |
| uint64_t sesparse_l2_tables_offset; |
| uint64_t sesparse_clusters_offset; |
| int32_t entry_size; |
| 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; |
| void *l1_table; |
| uint32_t *l1_backup_table; |
| unsigned int l1_size; |
| uint32_t l1_entry_sectors; |
| |
| unsigned int l2_size; |
| void *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 || |
| strncmp("version=3\n", p, strlen("version=3\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 || |
| strncmp("version=3\r\n", p, strlen("version=3\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_child(bs, 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); |
| } |
| |
| /* Return -ve errno, or 0 on success and write CID into *pcid. */ |
| static int vmdk_read_cid(BlockDriverState *bs, int parent, uint32_t *pcid) |
| { |
| char *desc; |
| uint32_t cid; |
| const char *p_name, *cid_str; |
| size_t cid_str_size; |
| BDRVVmdkState *s = bs->opaque; |
| int ret; |
| |
| desc = g_malloc0(DESC_SIZE); |
| ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE); |
| if (ret < 0) { |
| goto out; |
| } |
| |
| 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) { |
| ret = -EINVAL; |
| goto out; |
| } |
| p_name += cid_str_size; |
| if (sscanf(p_name, "%" SCNx32, &cid) != 1) { |
| ret = -EINVAL; |
| goto out; |
| } |
| *pcid = cid; |
| ret = 0; |
| |
| out: |
| g_free(desc); |
| return ret; |
| } |
| |
| static int vmdk_write_cid(BlockDriverState *bs, uint32_t cid) |
| { |
| char *desc, *tmp_desc; |
| char *p_name, *tmp_str; |
| BDRVVmdkState *s = bs->opaque; |
| int ret = 0; |
| |
| desc = g_malloc0(DESC_SIZE); |
| tmp_desc = g_malloc0(DESC_SIZE); |
| ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE); |
| if (ret < 0) { |
| goto out; |
| } |
| |
| desc[DESC_SIZE - 1] = '\0'; |
| tmp_str = strstr(desc, "parentCID"); |
| if (tmp_str == NULL) { |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| pstrcpy(tmp_desc, DESC_SIZE, tmp_str); |
| p_name = strstr(desc, "CID"); |
| if (p_name != NULL) { |
| p_name += sizeof("CID"); |
| snprintf(p_name, DESC_SIZE - (p_name - desc), "%" PRIx32 "\n", cid); |
| pstrcat(desc, DESC_SIZE, tmp_desc); |
| } |
| |
| ret = bdrv_pwrite_sync(bs->file, s->desc_offset, desc, DESC_SIZE); |
| |
| out: |
| g_free(desc); |
| g_free(tmp_desc); |
| return ret; |
| } |
| |
| static int vmdk_is_cid_valid(BlockDriverState *bs) |
| { |
| BDRVVmdkState *s = bs->opaque; |
| uint32_t cur_pcid; |
| |
| if (!s->cid_checked && bs->backing) { |
| BlockDriverState *p_bs = bs->backing->bs; |
| |
| if (strcmp(p_bs->drv->format_name, "vmdk")) { |
| /* Backing file is not in vmdk format, so it does not have |
| * a CID, which makes the overlay's parent CID invalid */ |
| return 0; |
| } |
| |
| if (vmdk_read_cid(p_bs, 0, &cur_pcid) != 0) { |
| /* read failure: report as not valid */ |
| return 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; |
| BDRVVmdkState *s = bs->opaque; |
| int ret; |
| |
| desc = g_malloc0(DESC_SIZE + 1); |
| ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE); |
| if (ret < 0) { |
| goto out; |
| } |
| ret = 0; |
| |
| 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) { |
| ret = -EINVAL; |
| goto out; |
| } |
| if ((end_name - p_name) > sizeof(bs->auto_backing_file) - 1) { |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| pstrcpy(bs->auto_backing_file, end_name - p_name + 1, p_name); |
| pstrcpy(bs->backing_file, sizeof(bs->backing_file), |
| bs->auto_backing_file); |
| pstrcpy(bs->backing_format, sizeof(bs->backing_format), |
| "vmdk"); |
| } |
| |
| out: |
| g_free(desc); |
| return ret; |
| } |
| |
| /* 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, |
| BdrvChild *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 > 32 * 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 32M, which is enough to store: |
| * 8TB - for both VMDK3 & VMDK4 with |
| * minimal cluster size: 512B |
| * minimal L2 table size: 512 entries |
| * 8 TB is still more than the maximal value supported for |
| * VMDK3 & VMDK4 which is 2TB. |
| * 64TB - for "ESXi seSparse Extent" |
| * minimal cluster size: 512B (default is 4KB) |
| * L2 table size: 4096 entries (const). |
| * 64TB is more than the maximal value supported for |
| * seSparse VMDKs (which is slightly less than 64TB) |
| */ |
| error_setg(errp, "L1 size too big"); |
| return -EFBIG; |
| } |
| |
| nb_sectors = bdrv_nb_sectors(file->bs); |
| 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); |
| extent->entry_size = sizeof(uint32_t); |
| |
| 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 * extent->entry_size; |
| 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) { |
| bdrv_refresh_filename(extent->file->bs); |
| error_setg_errno(errp, -ret, |
| "Could not read l1 table from extent '%s'", |
| extent->file->bs->filename); |
| goto fail_l1; |
| } |
| for (i = 0; i < extent->l1_size; i++) { |
| if (extent->entry_size == sizeof(uint64_t)) { |
| le64_to_cpus((uint64_t *)extent->l1_table + i); |
| } else { |
| assert(extent->entry_size == sizeof(uint32_t)); |
| le32_to_cpus((uint32_t *)extent->l1_table + i); |
| } |
| } |
| |
| if (extent->l1_backup_table_offset) { |
| assert(!extent->sesparse); |
| 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) { |
| bdrv_refresh_filename(extent->file->bs); |
| error_setg_errno(errp, -ret, |
| "Could not read l1 backup table from extent '%s'", |
| extent->file->bs->filename); |
| goto fail_l1b; |
| } |
| for (i = 0; i < extent->l1_size; i++) { |
| le32_to_cpus(&extent->l1_backup_table[i]); |
| } |
| } |
| |
| extent->l2_cache = |
| g_malloc(extent->entry_size * 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, |
| BdrvChild *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) { |
| bdrv_refresh_filename(file->bs); |
| error_setg_errno(errp, -ret, |
| "Could not read header from file '%s'", |
| file->bs->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; |
| } |
| |
| #define SESPARSE_CONST_HEADER_MAGIC UINT64_C(0x00000000cafebabe) |
| #define SESPARSE_VOLATILE_HEADER_MAGIC UINT64_C(0x00000000cafecafe) |
| |
| /* Strict checks - format not officially documented */ |
| static int check_se_sparse_const_header(VMDKSESparseConstHeader *header, |
| Error **errp) |
| { |
| header->magic = le64_to_cpu(header->magic); |
| header->version = le64_to_cpu(header->version); |
| header->grain_size = le64_to_cpu(header->grain_size); |
| header->grain_table_size = le64_to_cpu(header->grain_table_size); |
| header->flags = le64_to_cpu(header->flags); |
| header->reserved1 = le64_to_cpu(header->reserved1); |
| header->reserved2 = le64_to_cpu(header->reserved2); |
| header->reserved3 = le64_to_cpu(header->reserved3); |
| header->reserved4 = le64_to_cpu(header->reserved4); |
| |
| header->volatile_header_offset = |
| le64_to_cpu(header->volatile_header_offset); |
| header->volatile_header_size = le64_to_cpu(header->volatile_header_size); |
| |
| header->journal_header_offset = le64_to_cpu(header->journal_header_offset); |
| header->journal_header_size = le64_to_cpu(header->journal_header_size); |
| |
| header->journal_offset = le64_to_cpu(header->journal_offset); |
| header->journal_size = le64_to_cpu(header->journal_size); |
| |
| header->grain_dir_offset = le64_to_cpu(header->grain_dir_offset); |
| header->grain_dir_size = le64_to_cpu(header->grain_dir_size); |
| |
| header->grain_tables_offset = le64_to_cpu(header->grain_tables_offset); |
| header->grain_tables_size = le64_to_cpu(header->grain_tables_size); |
| |
| header->free_bitmap_offset = le64_to_cpu(header->free_bitmap_offset); |
| header->free_bitmap_size = le64_to_cpu(header->free_bitmap_size); |
| |
| header->backmap_offset = le64_to_cpu(header->backmap_offset); |
| header->backmap_size = le64_to_cpu(header->backmap_size); |
| |
| header->grains_offset = le64_to_cpu(header->grains_offset); |
| header->grains_size = le64_to_cpu(header->grains_size); |
| |
| if (header->magic != SESPARSE_CONST_HEADER_MAGIC) { |
| error_setg(errp, "Bad const header magic: 0x%016" PRIx64, |
| header->magic); |
| return -EINVAL; |
| } |
| |
| if (header->version != 0x0000000200000001) { |
| error_setg(errp, "Unsupported version: 0x%016" PRIx64, |
| header->version); |
| return -ENOTSUP; |
| } |
| |
| if (header->grain_size != 8) { |
| error_setg(errp, "Unsupported grain size: %" PRIu64, |
| header->grain_size); |
| return -ENOTSUP; |
| } |
| |
| if (header->grain_table_size != 64) { |
| error_setg(errp, "Unsupported grain table size: %" PRIu64, |
| header->grain_table_size); |
| return -ENOTSUP; |
| } |
| |
| if (header->flags != 0) { |
| error_setg(errp, "Unsupported flags: 0x%016" PRIx64, |
| header->flags); |
| return -ENOTSUP; |
| } |
| |
| if (header->reserved1 != 0 || header->reserved2 != 0 || |
| header->reserved3 != 0 || header->reserved4 != 0) { |
| error_setg(errp, "Unsupported reserved bits:" |
| " 0x%016" PRIx64 " 0x%016" PRIx64 |
| " 0x%016" PRIx64 " 0x%016" PRIx64, |
| header->reserved1, header->reserved2, |
| header->reserved3, header->reserved4); |
| return -ENOTSUP; |
| } |
| |
| /* check that padding is 0 */ |
| if (!buffer_is_zero(header->pad, sizeof(header->pad))) { |
| error_setg(errp, "Unsupported non-zero const header padding"); |
| return -ENOTSUP; |
| } |
| |
| return 0; |
| } |
| |
| static int check_se_sparse_volatile_header(VMDKSESparseVolatileHeader *header, |
| Error **errp) |
| { |
| header->magic = le64_to_cpu(header->magic); |
| header->free_gt_number = le64_to_cpu(header->free_gt_number); |
| header->next_txn_seq_number = le64_to_cpu(header->next_txn_seq_number); |
| header->replay_journal = le64_to_cpu(header->replay_journal); |
| |
| if (header->magic != SESPARSE_VOLATILE_HEADER_MAGIC) { |
| error_setg(errp, "Bad volatile header magic: 0x%016" PRIx64, |
| header->magic); |
| return -EINVAL; |
| } |
| |
| if (header->replay_journal) { |
| error_setg(errp, "Image is dirty, Replaying journal not supported"); |
| return -ENOTSUP; |
| } |
| |
| /* check that padding is 0 */ |
| if (!buffer_is_zero(header->pad, sizeof(header->pad))) { |
| error_setg(errp, "Unsupported non-zero volatile header padding"); |
| return -ENOTSUP; |
| } |
| |
| return 0; |
| } |
| |
| static int vmdk_open_se_sparse(BlockDriverState *bs, |
| BdrvChild *file, |
| int flags, Error **errp) |
| { |
| int ret; |
| VMDKSESparseConstHeader const_header; |
| VMDKSESparseVolatileHeader volatile_header; |
| VmdkExtent *extent; |
| |
| ret = bdrv_apply_auto_read_only(bs, |
| "No write support for seSparse images available", errp); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| assert(sizeof(const_header) == SECTOR_SIZE); |
| |
| ret = bdrv_pread(file, 0, &const_header, sizeof(const_header)); |
| if (ret < 0) { |
| bdrv_refresh_filename(file->bs); |
| error_setg_errno(errp, -ret, |
| "Could not read const header from file '%s'", |
| file->bs->filename); |
| return ret; |
| } |
| |
| /* check const header */ |
| ret = check_se_sparse_const_header(&const_header, errp); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| assert(sizeof(volatile_header) == SECTOR_SIZE); |
| |
| ret = bdrv_pread(file, |
| const_header.volatile_header_offset * SECTOR_SIZE, |
| &volatile_header, sizeof(volatile_header)); |
| if (ret < 0) { |
| bdrv_refresh_filename(file->bs); |
| error_setg_errno(errp, -ret, |
| "Could not read volatile header from file '%s'", |
| file->bs->filename); |
| return ret; |
| } |
| |
| /* check volatile header */ |
| ret = check_se_sparse_volatile_header(&volatile_header, errp); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| ret = vmdk_add_extent(bs, file, false, |
| const_header.capacity, |
| const_header.grain_dir_offset * SECTOR_SIZE, |
| 0, |
| const_header.grain_dir_size * |
| SECTOR_SIZE / sizeof(uint64_t), |
| const_header.grain_table_size * |
| SECTOR_SIZE / sizeof(uint64_t), |
| const_header.grain_size, |
| &extent, |
| errp); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| extent->sesparse = true; |
| extent->sesparse_l2_tables_offset = const_header.grain_tables_offset; |
| extent->sesparse_clusters_offset = const_header.grains_offset; |
| extent->entry_size = sizeof(uint64_t); |
| |
| 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(BdrvChild *file, uint64_t desc_offset, Error **errp) |
| { |
| int64_t size; |
| char *buf; |
| int ret; |
| |
| size = bdrv_getlength(file->bs); |
| 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, |
| BdrvChild *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; |
| bool compressed; |
| |
| ret = bdrv_pread(file, sizeof(magic), &header, sizeof(header)); |
| if (ret < 0) { |
| bdrv_refresh_filename(file->bs); |
| error_setg_errno(errp, -ret, |
| "Could not read header from file '%s'", |
| file->bs->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->bs->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; |
| } |
| |
| compressed = |
| le16_to_cpu(header.compressAlgorithm) == VMDK4_COMPRESSION_DEFLATE; |
| if (le32_to_cpu(header.version) > 3) { |
| error_setg(errp, "Unsupported VMDK version %" PRIu32, |
| le32_to_cpu(header.version)); |
| return -ENOTSUP; |
| } else if (le32_to_cpu(header.version) == 3 && (flags & BDRV_O_RDWR) && |
| !compressed) { |
| /* 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->bs) < 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, BdrvChild *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 const char *next_line(const char *s) |
| { |
| while (*s) { |
| if (*s == '\n') { |
| return s + 1; |
| } |
| s++; |
| } |
| return s; |
| } |
| |
| 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, *np; |
| int64_t sectors = 0; |
| int64_t flat_offset; |
| char *extent_path; |
| BdrvChild *extent_file; |
| BDRVVmdkState *s = bs->opaque; |
| VmdkExtent *extent; |
| char extent_opt_prefix[32]; |
| Error *local_err = NULL; |
| |
| for (p = desc; *p; p = next_line(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" |
| * RW [size in sectors] SESPARSE "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")) { |
| continue; |
| } else if (!strcmp(type, "FLAT")) { |
| if (matches != 5 || flat_offset < 0) { |
| goto invalid; |
| } |
| } else if (!strcmp(type, "VMFS")) { |
| if (matches == 4) { |
| flat_offset = 0; |
| } else { |
| goto invalid; |
| } |
| } else if (matches != 4) { |
| goto invalid; |
| } |
| |
| if (sectors <= 0 || |
| (strcmp(type, "FLAT") && strcmp(type, "SPARSE") && |
| strcmp(type, "VMFS") && strcmp(type, "VMFSSPARSE") && |
| strcmp(type, "SESPARSE")) || |
| (strcmp(access, "RW"))) { |
| continue; |
| } |
| |
| if (!path_is_absolute(fname) && !path_has_protocol(fname) && |
| !desc_file_path[0]) |
| { |
| bdrv_refresh_filename(bs->file->bs); |
| error_setg(errp, "Cannot use relative extent paths with VMDK " |
| "descriptor file '%s'", bs->file->bs->filename); |
| return -EINVAL; |
| } |
| |
| extent_path = path_combine(desc_file_path, fname); |
| |
| ret = snprintf(extent_opt_prefix, 32, "extents.%d", s->num_extents); |
| assert(ret < 32); |
| |
| extent_file = bdrv_open_child(extent_path, options, extent_opt_prefix, |
| bs, &child_file, false, &local_err); |
| g_free(extent_path); |
| if (local_err) { |
| error_propagate(errp, local_err); |
| return -EINVAL; |
| } |
| |
| /* 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_child(bs, 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_child(bs, extent_file); |
| return ret; |
| } |
| extent = &s->extents[s->num_extents - 1]; |
| } else if (!strcmp(type, "SESPARSE")) { |
| ret = vmdk_open_se_sparse(bs, extent_file, bs->open_flags, errp); |
| if (ret) { |
| bdrv_unref_child(bs, extent_file); |
| return ret; |
| } |
| extent = &s->extents[s->num_extents - 1]; |
| } else { |
| error_setg(errp, "Unsupported extent type '%s'", type); |
| bdrv_unref_child(bs, extent_file); |
| return -ENOTSUP; |
| } |
| extent->type = g_strdup(type); |
| } |
| return 0; |
| |
| invalid: |
| np = next_line(p); |
| assert(np != p); |
| if (np[-1] == '\n') { |
| np--; |
| } |
| error_setg(errp, "Invalid extent line: %.*s", (int)(np - p), p); |
| return -EINVAL; |
| } |
| |
| 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, "seSparse") && |
| 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->bs->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; |
| Error *local_err = NULL; |
| |
| bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file, |
| false, errp); |
| if (!bs->file) { |
| return -EINVAL; |
| } |
| |
| 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; |
| } |
| ret = vmdk_read_cid(bs, 0, &s->cid); |
| if (ret) { |
| goto fail; |
| } |
| ret = vmdk_read_cid(bs, 1, &s->parent_cid); |
| if (ret) { |
| goto fail; |
| } |
| 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)); |
| ret = migrate_add_blocker(s->migration_blocker, &local_err); |
| if (local_err) { |
| error_propagate(errp, local_err); |
| error_free(s->migration_blocker); |
| goto fail; |
| } |
| |
| 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.pwrite_zeroes_alignment = |
| MAX(bs->bl.pwrite_zeroes_alignment, |
| s->extents[i].cluster_sectors << BDRV_SECTOR_BITS); |
| } |
| } |
| } |
| |
| /** |
| * 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_offset, |
| uint64_t offset, |
| uint64_t skip_start_bytes, |
| uint64_t skip_end_bytes) |
| { |
| int ret = VMDK_OK; |
| int64_t cluster_bytes; |
| uint8_t *whole_grain; |
| |
| /* For COW, align request sector_num to cluster start */ |
| cluster_bytes = extent->cluster_sectors << BDRV_SECTOR_BITS; |
| offset = QEMU_ALIGN_DOWN(offset, cluster_bytes); |
| whole_grain = qemu_blockalign(bs, cluster_bytes); |
| |
| if (!bs->backing) { |
| memset(whole_grain, 0, skip_start_bytes); |
| memset(whole_grain + skip_end_bytes, 0, cluster_bytes - skip_end_bytes); |
| } |
| |
| assert(skip_end_bytes <= cluster_bytes); |
| /* 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 && !vmdk_is_cid_valid(bs)) { |
| ret = VMDK_ERROR; |
| goto exit; |
| } |
| |
| /* Read backing data before skip range */ |
| if (skip_start_bytes > 0) { |
| if (bs->backing) { |
| /* qcow2 emits this on bs->file instead of bs->backing */ |
| BLKDBG_EVENT(extent->file, BLKDBG_COW_READ); |
| ret = bdrv_pread(bs->backing, offset, whole_grain, |
| skip_start_bytes); |
| if (ret < 0) { |
| ret = VMDK_ERROR; |
| goto exit; |
| } |
| } |
| BLKDBG_EVENT(extent->file, BLKDBG_COW_WRITE); |
| ret = bdrv_pwrite(extent->file, cluster_offset, whole_grain, |
| skip_start_bytes); |
| if (ret < 0) { |
| ret = VMDK_ERROR; |
| goto exit; |
| } |
| } |
| /* Read backing data after skip range */ |
| if (skip_end_bytes < cluster_bytes) { |
| if (bs->backing) { |
| /* qcow2 emits this on bs->file instead of bs->backing */ |
| BLKDBG_EVENT(extent->file, BLKDBG_COW_READ); |
| ret = bdrv_pread(bs->backing, offset + skip_end_bytes, |
| whole_grain + skip_end_bytes, |
| cluster_bytes - skip_end_bytes); |
| if (ret < 0) { |
| ret = VMDK_ERROR; |
| goto exit; |
| } |
| } |
| BLKDBG_EVENT(extent->file, BLKDBG_COW_WRITE); |
| ret = bdrv_pwrite(extent->file, cluster_offset + skip_end_bytes, |
| whole_grain + skip_end_bytes, |
| cluster_bytes - skip_end_bytes); |
| if (ret < 0) { |
| ret = VMDK_ERROR; |
| goto exit; |
| } |
| } |
| |
| ret = VMDK_OK; |
| 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 */ |
| BLKDBG_EVENT(extent->file, BLKDBG_L2_UPDATE); |
| 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_bytes, |
| uint64_t skip_end_bytes) |
| { |
| unsigned int l1_index, l2_offset, l2_index; |
| int min_index, i, j; |
| uint32_t min_count; |
| void *l2_table; |
| bool zeroed = false; |
| int64_t ret; |
| int64_t cluster_sector; |
| unsigned int l2_size_bytes = extent->l2_size * extent->entry_size; |
| |
| 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; |
| } |
| if (extent->sesparse) { |
| uint64_t l2_offset_u64; |
| |
| assert(extent->entry_size == sizeof(uint64_t)); |
| |
| l2_offset_u64 = ((uint64_t *)extent->l1_table)[l1_index]; |
| if (l2_offset_u64 == 0) { |
| l2_offset = 0; |
| } else if ((l2_offset_u64 & 0xffffffff00000000) != 0x1000000000000000) { |
| /* |
| * Top most nibble is 0x1 if grain table is allocated. |
| * strict check - top most 4 bytes must be 0x10000000 since max |
| * supported size is 64TB for disk - so no more than 64TB / 16MB |
| * grain directories which is smaller than uint32, |
| * where 16MB is the only supported default grain table coverage. |
| */ |
| return VMDK_ERROR; |
| } else { |
| l2_offset_u64 = l2_offset_u64 & 0x00000000ffffffff; |
| l2_offset_u64 = extent->sesparse_l2_tables_offset + |
| l2_offset_u64 * l2_size_bytes / SECTOR_SIZE; |
| if (l2_offset_u64 > 0x00000000ffffffff) { |
| return VMDK_ERROR; |
| } |
| l2_offset = (unsigned int)(l2_offset_u64); |
| } |
| } else { |
| assert(extent->entry_size == sizeof(uint32_t)); |
| l2_offset = ((uint32_t *)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 = (char *)extent->l2_cache + (i * l2_size_bytes); |
| 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 = (char *)extent->l2_cache + (min_index * l2_size_bytes); |
| BLKDBG_EVENT(extent->file, BLKDBG_L2_LOAD); |
| if (bdrv_pread(extent->file, |
| (int64_t)l2_offset * 512, |
| l2_table, |
| l2_size_bytes |
| ) != l2_size_bytes) { |
| 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; |
| |
| if (extent->sesparse) { |
| cluster_sector = le64_to_cpu(((uint64_t *)l2_table)[l2_index]); |
| switch (cluster_sector & 0xf000000000000000) { |
| case 0x0000000000000000: |
| /* unallocated grain */ |
| if (cluster_sector != 0) { |
| return VMDK_ERROR; |
| } |
| break; |
| case 0x1000000000000000: |
| /* scsi-unmapped grain - fallthrough */ |
| case 0x2000000000000000: |
| /* zero grain */ |
| zeroed = true; |
| break; |
| case 0x3000000000000000: |
| /* allocated grain */ |
| cluster_sector = (((cluster_sector & 0x0fff000000000000) >> 48) | |
| ((cluster_sector & 0x0000ffffffffffff) << 12)); |
| cluster_sector = extent->sesparse_clusters_offset + |
| cluster_sector * extent->cluster_sectors; |
| break; |
| default: |
| return VMDK_ERROR; |
| } |
| } else { |
| cluster_sector = le32_to_cpu(((uint32_t *)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; |
| } |
| assert(!extent->sesparse); |
| |
| if (extent->next_cluster_sector >= VMDK_EXTENT_MAX_SECTORS) { |
| return VMDK_ERROR; |
| } |
| |
| 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 * BDRV_SECTOR_SIZE, |
| offset, skip_start_bytes, skip_end_bytes); |
| if (ret) { |
| return ret; |
| } |
| 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 = ((uint32_t *)l2_table) + l2_index; |
| } |
| } |
| *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_offset_in_cluster(VmdkExtent *extent, |
| int64_t offset) |
| { |
| uint64_t extent_begin_offset, extent_relative_offset; |
| uint64_t cluster_size = extent->cluster_sectors * BDRV_SECTOR_SIZE; |
| |
| extent_begin_offset = |
| (extent->end_sector - extent->sectors) * BDRV_SECTOR_SIZE; |
| extent_relative_offset = offset - extent_begin_offset; |
| return extent_relative_offset % cluster_size; |
| } |
| |
| static int coroutine_fn vmdk_co_block_status(BlockDriverState *bs, |
| bool want_zero, |
| int64_t offset, int64_t bytes, |
| int64_t *pnum, int64_t *map, |
| BlockDriverState **file) |
| { |
| BDRVVmdkState *s = bs->opaque; |
| int64_t index_in_cluster, n, ret; |
| uint64_t cluster_offset; |
| VmdkExtent *extent; |
| |
| extent = find_extent(s, offset >> BDRV_SECTOR_BITS, NULL); |
| if (!extent) { |
| return -EIO; |
| } |
| qemu_co_mutex_lock(&s->lock); |
| ret = get_cluster_offset(bs, extent, NULL, offset, false, &cluster_offset, |
| 0, 0); |
| qemu_co_mutex_unlock(&s->lock); |
| |
| index_in_cluster = vmdk_find_offset_in_cluster(extent, offset); |
| 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->compressed) { |
| ret |= BDRV_BLOCK_OFFSET_VALID; |
| *map = cluster_offset + index_in_cluster; |
| } |
| *file = extent->file->bs; |
| break; |
| } |
| |
| n = extent->cluster_sectors * BDRV_SECTOR_SIZE - index_in_cluster; |
| *pnum = MIN(n, bytes); |
| return ret; |
| } |
| |
| static int vmdk_write_extent(VmdkExtent *extent, int64_t cluster_offset, |
| int64_t offset_in_cluster, QEMUIOVector *qiov, |
| uint64_t qiov_offset, uint64_t n_bytes, |
| uint64_t offset) |
| { |
| int ret; |
| VmdkGrainMarker *data = NULL; |
| uLongf buf_len; |
| QEMUIOVector local_qiov; |
| int64_t write_offset; |
| int64_t write_end_sector; |
| |
| if (extent->compressed) { |
| void *compressed_data; |
| |
| if (!extent->has_marker) { |
| ret = -EINVAL; |
| goto out; |
| } |
| buf_len = (extent->cluster_sectors << 9) * 2; |
| data = g_malloc(buf_len + sizeof(VmdkGrainMarker)); |
| |
| compressed_data = g_malloc(n_bytes); |
| qemu_iovec_to_buf(qiov, qiov_offset, compressed_data, n_bytes); |
| ret = compress(data->data, &buf_len, compressed_data, n_bytes); |
| g_free(compressed_data); |
| |
| if (ret != Z_OK || buf_len == 0) { |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| data->lba = cpu_to_le64(offset >> BDRV_SECTOR_BITS); |
| data->size = cpu_to_le32(buf_len); |
| |
| n_bytes = buf_len + sizeof(VmdkGrainMarker); |
| qemu_iovec_init_buf(&local_qiov, data, n_bytes); |
| |
| BLKDBG_EVENT(extent->file, BLKDBG_WRITE_COMPRESSED); |
| } else { |
| qemu_iovec_init(&local_qiov, qiov->niov); |
| qemu_iovec_concat(&local_qiov, qiov, qiov_offset, n_bytes); |
| |
| BLKDBG_EVENT(extent->file, BLKDBG_WRITE_AIO); |
| } |
| |
| write_offset = cluster_offset + offset_in_cluster; |
| ret = bdrv_co_pwritev(extent->file, write_offset, n_bytes, |
| &local_qiov, 0); |
| |
| write_end_sector = DIV_ROUND_UP(write_offset + n_bytes, BDRV_SECTOR_SIZE); |
| |
| if (extent->compressed) { |
| extent->next_cluster_sector = write_end_sector; |
| } else { |
| extent->next_cluster_sector = MAX(extent->next_cluster_sector, |
| write_end_sector); |
| } |
| |
| if (ret < 0) { |
| goto out; |
| } |
| ret = 0; |
| out: |
| g_free(data); |
| if (!extent->compressed) { |
| qemu_iovec_destroy(&local_qiov); |
| } |
| return ret; |
| } |
| |
| static int vmdk_read_extent(VmdkExtent *extent, int64_t cluster_offset, |
| int64_t offset_in_cluster, QEMUIOVector *qiov, |
| int bytes) |
| { |
| 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) { |
| BLKDBG_EVENT(extent->file, BLKDBG_READ_AIO); |
| ret = bdrv_co_preadv(extent->file, |
| cluster_offset + offset_in_cluster, bytes, |
| qiov, 0); |
| if (ret < 0) { |
| return ret; |
| } |
| return 0; |
| } |
| 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); |
| BLKDBG_EVENT(extent->file, BLKDBG_READ_COMPRESSED); |
| 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 + bytes > buf_len) { |
| ret = -EINVAL; |
| goto out; |
| } |
| qemu_iovec_from_buf(qiov, 0, uncomp_buf + offset_in_cluster, bytes); |
| ret = 0; |
| |
| out: |
| g_free(uncomp_buf); |
| g_free(cluster_buf); |
| return ret; |
| } |
| |
| static int coroutine_fn |
| vmdk_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes, |
| QEMUIOVector *qiov, int flags) |
| { |
| BDRVVmdkState *s = bs->opaque; |
| int ret; |
| uint64_t n_bytes, offset_in_cluster; |
| VmdkExtent *extent = NULL; |
| QEMUIOVector local_qiov; |
| uint64_t cluster_offset; |
| uint64_t bytes_done = 0; |
| |
| qemu_iovec_init(&local_qiov, qiov->niov); |
| qemu_co_mutex_lock(&s->lock); |
| |
| while (bytes > 0) { |
| extent = find_extent(s, offset >> BDRV_SECTOR_BITS, extent); |
| if (!extent) { |
| ret = -EIO; |
| goto fail; |
| } |
| ret = get_cluster_offset(bs, extent, NULL, |
| offset, false, &cluster_offset, 0, 0); |
| offset_in_cluster = vmdk_find_offset_in_cluster(extent, offset); |
| |
| n_bytes = MIN(bytes, extent->cluster_sectors * BDRV_SECTOR_SIZE |
| - offset_in_cluster); |
| |
| if (ret != VMDK_OK) { |
| /* if not allocated, try to read from parent image, if exist */ |
| if (bs->backing && ret != VMDK_ZEROED) { |
| if (!vmdk_is_cid_valid(bs)) { |
| ret = -EINVAL; |
| goto fail; |
| } |
| |
| qemu_iovec_reset(&local_qiov); |
| qemu_iovec_concat(&local_qiov, qiov, bytes_done, n_bytes); |
| |
| /* qcow2 emits this on bs->file instead of bs->backing */ |
| BLKDBG_EVENT(bs->file, BLKDBG_READ_BACKING_AIO); |
| ret = bdrv_co_preadv(bs->backing, offset, n_bytes, |
| &local_qiov, 0); |
| if (ret < 0) { |
| goto fail; |
| } |
| } else { |
| qemu_iovec_memset(qiov, bytes_done, 0, n_bytes); |
| } |
| } else { |
| qemu_iovec_reset(&local_qiov); |
| qemu_iovec_concat(&local_qiov, qiov, bytes_done, n_bytes); |
| |
| ret = vmdk_read_extent(extent, cluster_offset, offset_in_cluster, |
| &local_qiov, n_bytes); |
| if (ret) { |
| goto fail; |
| } |
| } |
| bytes -= n_bytes; |
| offset += n_bytes; |
| bytes_done += n_bytes; |
| } |
| |
| ret = 0; |
| fail: |
| qemu_co_mutex_unlock(&s->lock); |
| qemu_iovec_destroy(&local_qiov); |
| |
| 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_pwritev(BlockDriverState *bs, uint64_t offset, |
| uint64_t bytes, QEMUIOVector *qiov, |
| bool zeroed, bool zero_dry_run) |
| { |
| BDRVVmdkState *s = bs->opaque; |
| VmdkExtent *extent = NULL; |
| int ret; |
| int64_t offset_in_cluster, n_bytes; |
| uint64_t cluster_offset; |
| uint64_t bytes_done = 0; |
| VmdkMetaData m_data; |
| |
| if (DIV_ROUND_UP(offset, BDRV_SECTOR_SIZE) > bs->total_sectors) { |
| error_report("Wrong offset: offset=0x%" PRIx64 |
| " total_sectors=0x%" PRIx64, |
| offset, bs->total_sectors); |
| return -EIO; |
| } |
| |
| while (bytes > 0) { |
| extent = find_extent(s, offset >> BDRV_SECTOR_BITS, extent); |
| if (!extent) { |
| return -EIO; |
| } |
| if (extent->sesparse) { |
| return -ENOTSUP; |
| } |
| offset_in_cluster = vmdk_find_offset_in_cluster(extent, offset); |
| n_bytes = MIN(bytes, extent->cluster_sectors * BDRV_SECTOR_SIZE |
| - offset_in_cluster); |
| |
| ret = get_cluster_offset(bs, extent, &m_data, offset, |
| !(extent->compressed || zeroed), |
| &cluster_offset, offset_in_cluster, |
| offset_in_cluster + n_bytes); |
| 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, offset, |
| true, &cluster_offset, 0, 0); |
| } |
| } |
| if (ret == VMDK_ERROR) { |
| return -EINVAL; |
| } |
| if (zeroed) { |
| /* Do zeroed write, buf is ignored */ |
| if (extent->has_zero_grain && |
| offset_in_cluster == 0 && |
| n_bytes >= extent->cluster_sectors * BDRV_SECTOR_SIZE) { |
| n_bytes = extent->cluster_sectors * BDRV_SECTOR_SIZE; |
| 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, offset_in_cluster, |
| qiov, bytes_done, n_bytes, offset); |
| 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; |
| } |
| } |
| } |
| bytes -= n_bytes; |
| offset += n_bytes; |
| bytes_done += n_bytes; |
| |
| /* 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 int coroutine_fn |
| vmdk_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes, |
| QEMUIOVector *qiov, int flags) |
| { |
| int ret; |
| BDRVVmdkState *s = bs->opaque; |
| qemu_co_mutex_lock(&s->lock); |
| ret = vmdk_pwritev(bs, offset, bytes, qiov, false, false); |
| qemu_co_mutex_unlock(&s->lock); |
| return ret; |
| } |
| |
| static int coroutine_fn |
| vmdk_co_pwritev_compressed(BlockDriverState *bs, uint64_t offset, |
| uint64_t bytes, QEMUIOVector *qiov) |
| { |
| if (bytes == 0) { |
| /* The caller will write bytes 0 to signal EOF. |
| * When receive it, we align EOF to a sector boundary. */ |
| BDRVVmdkState *s = bs->opaque; |
| int i, ret; |
| int64_t length; |
| |
| for (i = 0; i < s->num_extents; i++) { |
| length = bdrv_getlength(s->extents[i].file->bs); |
| if (length < 0) { |
| return length; |
| } |
| length = QEMU_ALIGN_UP(length, BDRV_SECTOR_SIZE); |
| ret = bdrv_truncate(s->extents[i].file, length, |
| PREALLOC_MODE_OFF, NULL); |
| if (ret < 0) { |
| return ret; |
| } |
| } |
| return 0; |
| } |
| return vmdk_co_pwritev(bs, offset, bytes, qiov, 0); |
| } |
| |
| static int coroutine_fn vmdk_co_pwrite_zeroes(BlockDriverState *bs, |
| int64_t offset, |
| int bytes, |
| 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_pwritev(bs, offset, bytes, NULL, true, true); |
| if (!ret) { |
| ret = vmdk_pwritev(bs, offset, bytes, NULL, true, false); |
| } |
| qemu_co_mutex_unlock(&s->lock); |
| return ret; |
| } |
| |
| static int vmdk_init_extent(BlockBackend *blk, |
| int64_t filesize, bool flat, |
| bool compress, bool zeroed_grain, |
| Error **errp) |
| { |
| int ret, i; |
| VMDK4Header header; |
| uint32_t tmp, magic, grains, gd_sectors, gt_size, gt_count; |
| uint32_t *gd_buf = NULL; |
| int gd_buf_size; |
| |
| if (flat) { |
| ret = blk_truncate(blk, filesize, PREALLOC_MODE_OFF, errp); |
| goto exit; |
| } |
| magic = cpu_to_be32(VMDK4_MAGIC); |
| memset(&header, 0, sizeof(header)); |
| if (compress) { |
| header.version = 3; |
| } else if (zeroed_grain) { |
| header.version = 2; |
| } else { |
| header.version = 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 = blk_pwrite(blk, 0, &magic, sizeof(magic), 0); |
| if (ret < 0) { |
| error_setg(errp, QERR_IO_ERROR); |
| goto exit; |
| } |
| ret = blk_pwrite(blk, sizeof(magic), &header, sizeof(header), 0); |
| if (ret < 0) { |
| error_setg(errp, QERR_IO_ERROR); |
| goto exit; |
| } |
| |
| ret = blk_truncate(blk, le64_to_cpu(header.grain_offset) << 9, |
| PREALLOC_MODE_OFF, errp); |
| if (ret < 0) { |
| 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 = blk_pwrite(blk, le64_to_cpu(header.rgd_offset) * BDRV_SECTOR_SIZE, |
| gd_buf, gd_buf_size, 0); |
| 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 = blk_pwrite(blk, le64_to_cpu(header.gd_offset) * BDRV_SECTOR_SIZE, |
| gd_buf, gd_buf_size, 0); |
| if (ret < 0) { |
| error_setg(errp, QERR_IO_ERROR); |
| } |
| |
| ret = 0; |
| exit: |
| g_free(gd_buf); |
| return ret; |
| } |
| |
| static int vmdk_create_extent(const char *filename, int64_t filesize, |
| bool flat, bool compress, bool zeroed_grain, |
| BlockBackend **pbb, |
| QemuOpts *opts, Error **errp) |
| { |
| int ret; |
| BlockBackend *blk = NULL; |
| Error *local_err = NULL; |
| |
| ret = bdrv_create_file(filename, opts, &local_err); |
| if (ret < 0) { |
| error_propagate(errp, local_err); |
| goto exit; |
| } |
| |
| blk = blk_new_open(filename, NULL, NULL, |
| BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL, |
| &local_err); |
| if (blk == NULL) { |
| error_propagate(errp, local_err); |
| ret = -EIO; |
| goto exit; |
| } |
| |
| blk_set_allow_write_beyond_eof(blk, true); |
| |
| ret = vmdk_init_extent(blk, filesize, flat, compress, zeroed_grain, errp); |
| exit: |
| if (blk) { |
| if (pbb) { |
| *pbb = blk; |
| } else { |
| blk_unref(blk); |
| blk = NULL; |
| } |
| } |
| 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; |
| } |
| |
| /* |
| * idx == 0: get or create the descriptor file (also the image file if in a |
| * non-split format. |
| * idx >= 1: get the n-th extent if in a split subformat |
| */ |
| typedef BlockBackend *(*vmdk_create_extent_fn)(int64_t size, |
| int idx, |
| bool flat, |
| bool split, |
| bool compress, |
| bool zeroed_grain, |
| void *opaque, |
| Error **errp); |
| |
| static void vmdk_desc_add_extent(GString *desc, |
| const char *extent_line_fmt, |
| int64_t size, const char *filename) |
| { |
| char *basename = g_path_get_basename(filename); |
| |
| g_string_append_printf(desc, extent_line_fmt, |
| DIV_ROUND_UP(size, BDRV_SECTOR_SIZE), basename); |
| g_free(basename); |
| } |
| |
| static int coroutine_fn vmdk_co_do_create(int64_t size, |
| BlockdevVmdkSubformat subformat, |
| BlockdevVmdkAdapterType adapter_type, |
| const char *backing_file, |
| const char *hw_version, |
| bool compat6, |
| bool zeroed_grain, |
| vmdk_create_extent_fn extent_fn, |
| void *opaque, |
| Error **errp) |
| { |
| int extent_idx; |
| BlockBackend *blk = NULL; |
| BlockBackend *extent_blk; |
| Error *local_err = NULL; |
| char *desc = NULL; |
| int ret = 0; |
| bool flat, split, compress; |
| GString *ext_desc_lines; |
| const int64_t split_size = 0x80000000; /* VMDK has constant split size */ |
| int64_t extent_size; |
| int64_t created_size = 0; |
| const char *extent_line_fmt; |
| char *parent_desc_line = g_malloc0(BUF_SIZE); |
| uint32_t parent_cid = 0xffffffff; |
| uint32_t number_heads = 16; |
| 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 = \"%s\"\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); |
| |
| /* Read out options */ |
| if (compat6) { |
| if (hw_version) { |
| error_setg(errp, |
| "compat6 cannot be enabled with hwversion set"); |
| ret = -EINVAL; |
| goto exit; |
| } |
| hw_version = "6"; |
| } |
| if (!hw_version) { |
| hw_version = "4"; |
| } |
| |
| if (adapter_type != BLOCKDEV_VMDK_ADAPTER_TYPE_IDE) { |
| /* 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; |
| } |
| split = (subformat == BLOCKDEV_VMDK_SUBFORMAT_TWOGBMAXEXTENTFLAT) || |
| (subformat == BLOCKDEV_VMDK_SUBFORMAT_TWOGBMAXEXTENTSPARSE); |
| flat = (subformat == BLOCKDEV_VMDK_SUBFORMAT_MONOLITHICFLAT) || |
| (subformat == BLOCKDEV_VMDK_SUBFORMAT_TWOGBMAXEXTENTFLAT); |
| compress = subformat == BLOCKDEV_VMDK_SUBFORMAT_STREAMOPTIMIZED; |
| |
| if (flat) { |
| extent_line_fmt = "RW %" PRId64 " FLAT \"%s\" 0\n"; |
| } else { |
| extent_line_fmt = "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; |
| } |
| |
| /* Create extents */ |
| if (split) { |
| extent_size = split_size; |
| } else { |
| extent_size = size; |
| } |
| if (!split && !flat) { |
| created_size = extent_size; |
| } else { |
| created_size = 0; |
| } |
| /* Get the descriptor file BDS */ |
| blk = extent_fn(created_size, 0, flat, split, compress, zeroed_grain, |
| opaque, errp); |
| if (!blk) { |
| ret = -EIO; |
| goto exit; |
| } |
| if (!split && !flat) { |
| vmdk_desc_add_extent(ext_desc_lines, extent_line_fmt, created_size, |
| blk_bs(blk)->filename); |
| } |
| |
| if (backing_file) { |
| BlockBackend *backing; |
| char *full_backing = |
| bdrv_get_full_backing_filename_from_filename(blk_bs(blk)->filename, |
| backing_file, |
| &local_err); |
| if (local_err) { |
| error_propagate(errp, local_err); |
| ret = -ENOENT; |
| goto exit; |
| } |
| assert(full_backing); |
| |
| backing = blk_new_open(full_backing, NULL, NULL, |
| BDRV_O_NO_BACKING, errp); |
| g_free(full_backing); |
| if (backing == NULL) { |
| ret = -EIO; |
| goto exit; |
| } |
| if (strcmp(blk_bs(backing)->drv->format_name, "vmdk")) { |
| error_setg(errp, "Invalid backing file format: %s. Must be vmdk", |
| blk_bs(backing)->drv->format_name); |
| blk_unref(backing); |
| ret = -EINVAL; |
| goto exit; |
| } |
| ret = vmdk_read_cid(blk_bs(backing), 0, &parent_cid); |
| blk_unref(backing); |
| if (ret) { |
| error_setg(errp, "Failed to read parent CID"); |
| goto exit; |
| } |
| snprintf(parent_desc_line, BUF_SIZE, |
| "parentFileNameHint=\"%s\"", backing_file); |
| } |
| extent_idx = 1; |
| while (created_size < size) { |
| int64_t cur_size = MIN(size - created_size, extent_size); |
| extent_blk = extent_fn(cur_size, extent_idx, flat, split, compress, |
| zeroed_grain, opaque, errp); |
| if (!extent_blk) { |
| ret = -EINVAL; |
| goto exit; |
| } |
| vmdk_desc_add_extent(ext_desc_lines, extent_line_fmt, cur_size, |
| blk_bs(extent_blk)->filename); |
| created_size += cur_size; |
| extent_idx++; |
| blk_unref(extent_blk); |
| } |
| |
| /* Check whether we got excess extents */ |
| extent_blk = extent_fn(-1, extent_idx, flat, split, compress, zeroed_grain, |
| opaque, NULL); |
| if (extent_blk) { |
| blk_unref(extent_blk); |
| error_setg(errp, "List of extents contains unused extents"); |
| ret = -EINVAL; |
| goto exit; |
| } |
| |
| /* generate descriptor file */ |
| desc = g_strdup_printf(desc_template, |
| g_random_int(), |
| parent_cid, |
| BlockdevVmdkSubformat_str(subformat), |
| parent_desc_line, |
| ext_desc_lines->str, |
| hw_version, |
| size / |
| (int64_t)(63 * number_heads * BDRV_SECTOR_SIZE), |
| number_heads, |
| BlockdevVmdkAdapterType_str(adapter_type)); |
| desc_len = strlen(desc); |
| /* the descriptor offset = 0x200 */ |
| if (!split && !flat) { |
| desc_offset = 0x200; |
| } |
| |
| ret = blk_pwrite(blk, desc_offset, desc, desc_len, 0); |
| 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 = blk_truncate(blk, desc_len, PREALLOC_MODE_OFF, errp); |
| if (ret < 0) { |
| goto exit; |
| } |
| } |
| ret = 0; |
| exit: |
| if (blk) { |
| blk_unref(blk); |
| } |
| g_free(desc); |
| g_free(parent_desc_line); |
| g_string_free(ext_desc_lines, true); |
| return ret; |
| } |
| |
| typedef struct { |
| char *path; |
| char *prefix; |
| char *postfix; |
| QemuOpts *opts; |
| } VMDKCreateOptsData; |
| |
| static BlockBackend *vmdk_co_create_opts_cb(int64_t size, int idx, |
| bool flat, bool split, bool compress, |
| bool zeroed_grain, void *opaque, |
| Error **errp) |
| { |
| BlockBackend *blk = NULL; |
| BlockDriverState *bs = NULL; |
| VMDKCreateOptsData *data = opaque; |
| char *ext_filename = NULL; |
| char *rel_filename = NULL; |
| |
| /* We're done, don't create excess extents. */ |
| if (size == -1) { |
| assert(errp == NULL); |
| return NULL; |
| } |
| |
| if (idx == 0) { |
| rel_filename = g_strdup_printf("%s%s", data->prefix, data->postfix); |
| } else if (split) { |
| rel_filename = g_strdup_printf("%s-%c%03d%s", |
| data->prefix, |
| flat ? 'f' : 's', idx, data->postfix); |
| } else { |
| assert(idx == 1); |
| rel_filename = g_strdup_printf("%s-flat%s", data->prefix, data->postfix); |
| } |
| |
| ext_filename = g_strdup_printf("%s%s", data->path, rel_filename); |
| g_free(rel_filename); |
| |
| if (vmdk_create_extent(ext_filename, size, |
| flat, compress, zeroed_grain, &blk, data->opts, |
| errp)) { |
| goto exit; |
| } |
| bdrv_unref(bs); |
| exit: |
| g_free(ext_filename); |
| return blk; |
| } |
| |
| static int coroutine_fn vmdk_co_create_opts(const char *filename, QemuOpts *opts, |
| Error **errp) |
| { |
| Error *local_err = NULL; |
| char *desc = NULL; |
| int64_t total_size = 0; |
| char *adapter_type = NULL; |
| BlockdevVmdkAdapterType adapter_type_enum; |
| char *backing_file = NULL; |
| char *hw_version = NULL; |
| char *fmt = NULL; |
| BlockdevVmdkSubformat subformat; |
| int ret = 0; |
| 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); |
| char *parent_desc_line = g_malloc0(BUF_SIZE); |
| bool zeroed_grain; |
| bool compat6; |
| VMDKCreateOptsData data; |
| |
| 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); |
| hw_version = qemu_opt_get_del(opts, BLOCK_OPT_HWVERSION); |
| compat6 = qemu_opt_get_bool_del(opts, BLOCK_OPT_COMPAT6, false); |
| if (strcmp(hw_version, "undefined") == 0) { |
| g_free(hw_version); |
| hw_version = NULL; |
| } |
| fmt = qemu_opt_get_del(opts, BLOCK_OPT_SUBFMT); |
| zeroed_grain = qemu_opt_get_bool_del(opts, BLOCK_OPT_ZEROED_GRAIN, false); |
| |
| if (adapter_type) { |
| adapter_type_enum = qapi_enum_parse(&BlockdevVmdkAdapterType_lookup, |
| adapter_type, |
| BLOCKDEV_VMDK_ADAPTER_TYPE_IDE, |
| &local_err); |
| if (local_err) { |
| error_propagate(errp, local_err); |
| ret = -EINVAL; |
| goto exit; |
| } |
| } else { |
| adapter_type_enum = BLOCKDEV_VMDK_ADAPTER_TYPE_IDE; |
| } |
| |
| if (!fmt) { |
| /* Default format to monolithicSparse */ |
| subformat = BLOCKDEV_VMDK_SUBFORMAT_MONOLITHICSPARSE; |
| } else { |
| subformat = qapi_enum_parse(&BlockdevVmdkSubformat_lookup, |
| fmt, |
| BLOCKDEV_VMDK_SUBFORMAT_MONOLITHICSPARSE, |
| &local_err); |
| if (local_err) { |
| error_propagate(errp, local_err); |
| ret = -EINVAL; |
| goto exit; |
| } |
| } |
| data = (VMDKCreateOptsData){ |
| .prefix = prefix, |
| .postfix = postfix, |
| .path = path, |
| .opts = opts, |
| }; |
| ret = vmdk_co_do_create(total_size, subformat, adapter_type_enum, |
| backing_file, hw_version, compat6, zeroed_grain, |
| vmdk_co_create_opts_cb, &data, errp); |
| |
| exit: |
| g_free(adapter_type); |
| g_free(backing_file); |
| g_free(hw_version); |
| 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); |
| return ret; |
| } |
| |
| static BlockBackend *vmdk_co_create_cb(int64_t size, int idx, |
| bool flat, bool split, bool compress, |
| bool zeroed_grain, void *opaque, |
| Error **errp) |
| { |
| int ret; |
| BlockDriverState *bs; |
| BlockBackend *blk; |
| BlockdevCreateOptionsVmdk *opts = opaque; |
| |
| if (idx == 0) { |
| bs = bdrv_open_blockdev_ref(opts->file, errp); |
| } else { |
| int i; |
| BlockdevRefList *list = opts->extents; |
| for (i = 1; i < idx; i++) { |
| if (!list || !list->next) { |
| error_setg(errp, "Extent [%d] not specified", i); |
| return NULL; |
| } |
| list = list->next; |
| } |
| if (!list) { |
| error_setg(errp, "Extent [%d] not specified", idx - 1); |
| return NULL; |
| } |
| bs = bdrv_open_blockdev_ref(list->value, errp); |
| } |
| if (!bs) { |
| return NULL; |
| } |
| blk = blk_new(bdrv_get_aio_context(bs), |
| BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE | BLK_PERM_RESIZE, |
| BLK_PERM_ALL); |
| if (blk_insert_bs(blk, bs, errp)) { |
| bdrv_unref(bs); |
| return NULL; |
| } |
| blk_set_allow_write_beyond_eof(blk, true); |
| bdrv_unref(bs); |
| |
| if (size != -1) { |
| ret = vmdk_init_extent(blk, size, flat, compress, zeroed_grain, errp); |
| if (ret) { |
| blk_unref(blk); |
| blk = NULL; |
| } |
| } |
| return blk; |
| } |
| |
| static int coroutine_fn vmdk_co_create(BlockdevCreateOptions *create_options, |
| Error **errp) |
| { |
| int ret; |
| BlockdevCreateOptionsVmdk *opts; |
| |
| opts = &create_options->u.vmdk; |
| |
| /* Validate options */ |
| if (!QEMU_IS_ALIGNED(opts->size, BDRV_SECTOR_SIZE)) { |
| error_setg(errp, "Image size must be a multiple of 512 bytes"); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| ret = vmdk_co_do_create(opts->size, |
| opts->subformat, |
| opts->adapter_type, |
| opts->backing_file, |
| opts->hwversion, |
| false, |
| opts->zeroed_grain, |
| vmdk_co_create_cb, |
| opts, errp); |
| return ret; |
| |
| out: |
| 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->bs); |
| 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->bs); |
| 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->bs); |
| 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->bs)) { |
| return 0; |
| } |
| } |
| } |
| return 1; |
| } |
| |
| static ImageInfo *vmdk_get_extent_info(VmdkExtent *extent) |
| { |
| ImageInfo *info = g_new0(ImageInfo, 1); |
| |
| bdrv_refresh_filename(extent->file->bs); |
| *info = (ImageInfo){ |
| .filename = g_strdup(extent->file->bs->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 coroutine_fn vmdk_co_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); |
| ret = -EINVAL; |
| 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) { |
| int64_t extent_len = bdrv_getlength(extent->file->bs); |
| if (extent_len < 0) { |
| fprintf(stderr, |
| "ERROR: could not get extent file length for sector %" |
| PRId64 "\n", sector_num); |
| ret = extent_len; |
| break; |
| } |
| if (cluster_offset >= extent_len) { |
| fprintf(stderr, |
| "ERROR: cluster offset for sector %" |
| PRId64 " points after EOF\n", sector_num); |
| ret = -EINVAL; |
| break; |
| } |
| } |
| sector_num += extent->cluster_sectors; |
| } |
| |
| result->corruptions++; |
| return ret; |
| } |
| |
| static ImageInfoSpecific *vmdk_get_specific_info(BlockDriverState *bs, |
| Error **errp) |
| { |
| int i; |
| BDRVVmdkState *s = bs->opaque; |
| ImageInfoSpecific *spec_info = g_new0(ImageInfoSpecific, 1); |
| ImageInfoList **next; |
| |
| *spec_info = (ImageInfoSpecific){ |
| .type = IMAGE_INFO_SPECIFIC_KIND_VMDK, |
| .u = { |
| .vmdk.data = g_new0(ImageInfoSpecificVmdk, 1), |
| }, |
| }; |
| |
| *spec_info->u.vmdk.data = (ImageInfoSpecificVmdk) { |
| .create_type = g_strdup(s->create_type), |
| .cid = s->cid, |
| .parent_cid = s->parent_cid, |
| }; |
| |
| next = &spec_info->u.vmdk.data->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_gather_child_options(BlockDriverState *bs, QDict *target, |
| bool backing_overridden) |
| { |
| /* No children but file and backing can be explicitly specified (TODO) */ |
| qdict_put(target, "file", |
| qobject_ref(bs->file->bs->full_open_options)); |
| |
| if (backing_overridden) { |
| if (bs->backing) { |
| qdict_put(target, "backing", |
| qobject_ref(bs->backing->bs->full_open_options)); |
| } else { |
| qdict_put_null(target, "backing"); |
| } |
| } |
| } |
| |
| 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_HWVERSION, |
| .type = QEMU_OPT_STRING, |
| .help = "VMDK hardware version", |
| .def_value_str = "undefined" |
| }, |
| { |
| .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_co_check = vmdk_co_check, |
| .bdrv_reopen_prepare = vmdk_reopen_prepare, |
| .bdrv_child_perm = bdrv_format_default_perms, |
| .bdrv_co_preadv = vmdk_co_preadv, |
| .bdrv_co_pwritev = vmdk_co_pwritev, |
| .bdrv_co_pwritev_compressed = vmdk_co_pwritev_compressed, |
| .bdrv_co_pwrite_zeroes = vmdk_co_pwrite_zeroes, |
| .bdrv_close = vmdk_close, |
| .bdrv_co_create_opts = vmdk_co_create_opts, |
| .bdrv_co_create = vmdk_co_create, |
| .bdrv_co_flush_to_disk = vmdk_co_flush, |
| .bdrv_co_block_status = vmdk_co_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_gather_child_options = vmdk_gather_child_options, |
| |
| .supports_backing = true, |
| .create_opts = &vmdk_create_opts, |
| }; |
| |
| static void bdrv_vmdk_init(void) |
| { |
| bdrv_register(&bdrv_vmdk); |
| } |
| |
| block_init(bdrv_vmdk_init); |