19aebd98aSStefan Weil /* 29aebd98aSStefan Weil * Block driver for the Virtual Disk Image (VDI) format 39aebd98aSStefan Weil * 4641543b7SStefan Weil * Copyright (c) 2009, 2012 Stefan Weil 59aebd98aSStefan Weil * 69aebd98aSStefan Weil * This program is free software: you can redistribute it and/or modify 79aebd98aSStefan Weil * it under the terms of the GNU General Public License as published by 89aebd98aSStefan Weil * the Free Software Foundation, either version 2 of the License, or 99aebd98aSStefan Weil * (at your option) version 3 or any later version. 109aebd98aSStefan Weil * 119aebd98aSStefan Weil * This program is distributed in the hope that it will be useful, 129aebd98aSStefan Weil * but WITHOUT ANY WARRANTY; without even the implied warranty of 139aebd98aSStefan Weil * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 149aebd98aSStefan Weil * GNU General Public License for more details. 159aebd98aSStefan Weil * 169aebd98aSStefan Weil * You should have received a copy of the GNU General Public License 179aebd98aSStefan Weil * along with this program. If not, see <http://www.gnu.org/licenses/>. 189aebd98aSStefan Weil * 199aebd98aSStefan Weil * Reference: 209aebd98aSStefan Weil * http://forums.virtualbox.org/viewtopic.php?t=8046 219aebd98aSStefan Weil * 229aebd98aSStefan Weil * This driver supports create / read / write operations on VDI images. 239aebd98aSStefan Weil * 249aebd98aSStefan Weil * Todo (see also TODO in code): 259aebd98aSStefan Weil * 269aebd98aSStefan Weil * Some features like snapshots are still missing. 279aebd98aSStefan Weil * 289aebd98aSStefan Weil * Deallocation of zero-filled blocks and shrinking images are missing, too 299aebd98aSStefan Weil * (might be added to common block layer). 309aebd98aSStefan Weil * 319aebd98aSStefan Weil * Allocation of blocks could be optimized (less writes to block map and 329aebd98aSStefan Weil * header). 339aebd98aSStefan Weil * 349aebd98aSStefan Weil * Read and write of adjacents blocks could be done in one operation 359aebd98aSStefan Weil * (current code uses one operation per block (1 MiB). 369aebd98aSStefan Weil * 379aebd98aSStefan Weil * The code is not thread safe (missing locks for changes in header and 389aebd98aSStefan Weil * block table, no problem with current QEMU). 399aebd98aSStefan Weil * 409aebd98aSStefan Weil * Hints: 419aebd98aSStefan Weil * 429aebd98aSStefan Weil * Blocks (VDI documentation) correspond to clusters (QEMU). 439aebd98aSStefan Weil * QEMU's backing files could be implemented using VDI snapshot files (TODO). 449aebd98aSStefan Weil * VDI snapshot files may also contain the complete machine state. 459aebd98aSStefan Weil * Maybe this machine state can be converted to QEMU PC machine snapshot data. 469aebd98aSStefan Weil * 479aebd98aSStefan Weil * The driver keeps a block cache (little endian entries) in memory. 489aebd98aSStefan Weil * For the standard block size (1 MiB), a 1 TiB disk will use 4 MiB RAM, 499aebd98aSStefan Weil * so this seems to be reasonable. 509aebd98aSStefan Weil */ 519aebd98aSStefan Weil 529aebd98aSStefan Weil #include "qemu-common.h" 539aebd98aSStefan Weil #include "block_int.h" 549aebd98aSStefan Weil #include "module.h" 55fc9d106cSKevin Wolf #include "migration.h" 569aebd98aSStefan Weil 57ee682d27SStefan Weil #if defined(CONFIG_UUID) 589aebd98aSStefan Weil #include <uuid/uuid.h> 599aebd98aSStefan Weil #else 609aebd98aSStefan Weil /* TODO: move uuid emulation to some central place in QEMU. */ 619aebd98aSStefan Weil #include "sysemu.h" /* UUID_FMT */ 629aebd98aSStefan Weil typedef unsigned char uuid_t[16]; 639aebd98aSStefan Weil void uuid_generate(uuid_t out); 649aebd98aSStefan Weil int uuid_is_null(const uuid_t uu); 659aebd98aSStefan Weil void uuid_unparse(const uuid_t uu, char *out); 669aebd98aSStefan Weil #endif 679aebd98aSStefan Weil 689aebd98aSStefan Weil /* Code configuration options. */ 699aebd98aSStefan Weil 709aebd98aSStefan Weil /* Enable debug messages. */ 719aebd98aSStefan Weil //~ #define CONFIG_VDI_DEBUG 729aebd98aSStefan Weil 739aebd98aSStefan Weil /* Support write operations on VDI images. */ 749aebd98aSStefan Weil #define CONFIG_VDI_WRITE 759aebd98aSStefan Weil 769aebd98aSStefan Weil /* Support non-standard block (cluster) size. This is untested. 779aebd98aSStefan Weil * Maybe it will be needed for very large images. 789aebd98aSStefan Weil */ 799aebd98aSStefan Weil //~ #define CONFIG_VDI_BLOCK_SIZE 809aebd98aSStefan Weil 819aebd98aSStefan Weil /* Support static (fixed, pre-allocated) images. */ 829aebd98aSStefan Weil #define CONFIG_VDI_STATIC_IMAGE 839aebd98aSStefan Weil 849aebd98aSStefan Weil /* Command line option for static images. */ 859aebd98aSStefan Weil #define BLOCK_OPT_STATIC "static" 869aebd98aSStefan Weil 879aebd98aSStefan Weil #define KiB 1024 889aebd98aSStefan Weil #define MiB (KiB * KiB) 899aebd98aSStefan Weil 909aebd98aSStefan Weil #define SECTOR_SIZE 512 9199cce9faSKevin Wolf #define DEFAULT_CLUSTER_SIZE (1 * MiB) 929aebd98aSStefan Weil 939aebd98aSStefan Weil #if defined(CONFIG_VDI_DEBUG) 949aebd98aSStefan Weil #define logout(fmt, ...) \ 959aebd98aSStefan Weil fprintf(stderr, "vdi\t%-24s" fmt, __func__, ##__VA_ARGS__) 969aebd98aSStefan Weil #else 979aebd98aSStefan Weil #define logout(fmt, ...) ((void)0) 989aebd98aSStefan Weil #endif 999aebd98aSStefan Weil 1009aebd98aSStefan Weil /* Image signature. */ 1019aebd98aSStefan Weil #define VDI_SIGNATURE 0xbeda107f 1029aebd98aSStefan Weil 1039aebd98aSStefan Weil /* Image version. */ 1049aebd98aSStefan Weil #define VDI_VERSION_1_1 0x00010001 1059aebd98aSStefan Weil 1069aebd98aSStefan Weil /* Image type. */ 1079aebd98aSStefan Weil #define VDI_TYPE_DYNAMIC 1 1089aebd98aSStefan Weil #define VDI_TYPE_STATIC 2 1099aebd98aSStefan Weil 1109aebd98aSStefan Weil /* Innotek / SUN images use these strings in header.text: 1119aebd98aSStefan Weil * "<<< innotek VirtualBox Disk Image >>>\n" 1129aebd98aSStefan Weil * "<<< Sun xVM VirtualBox Disk Image >>>\n" 1139aebd98aSStefan Weil * "<<< Sun VirtualBox Disk Image >>>\n" 1149aebd98aSStefan Weil * The value does not matter, so QEMU created images use a different text. 1159aebd98aSStefan Weil */ 1169aebd98aSStefan Weil #define VDI_TEXT "<<< QEMU VM Virtual Disk Image >>>\n" 1179aebd98aSStefan Weil 118c794b4e0SEric Sunshine /* A never-allocated block; semantically arbitrary content. */ 119c794b4e0SEric Sunshine #define VDI_UNALLOCATED 0xffffffffU 120c794b4e0SEric Sunshine 121c794b4e0SEric Sunshine /* A discarded (no longer allocated) block; semantically zero-filled. */ 122c794b4e0SEric Sunshine #define VDI_DISCARDED 0xfffffffeU 123c794b4e0SEric Sunshine 124c794b4e0SEric Sunshine #define VDI_IS_ALLOCATED(X) ((X) < VDI_DISCARDED) 1259aebd98aSStefan Weil 126ee682d27SStefan Weil #if !defined(CONFIG_UUID) 1279aebd98aSStefan Weil void uuid_generate(uuid_t out) 1289aebd98aSStefan Weil { 1294f3669eaSStefan Weil memset(out, 0, sizeof(uuid_t)); 1309aebd98aSStefan Weil } 1319aebd98aSStefan Weil 1329aebd98aSStefan Weil int uuid_is_null(const uuid_t uu) 1339aebd98aSStefan Weil { 1349aebd98aSStefan Weil uuid_t null_uuid = { 0 }; 1354f3669eaSStefan Weil return memcmp(uu, null_uuid, sizeof(uuid_t)) == 0; 1369aebd98aSStefan Weil } 1379aebd98aSStefan Weil 1389aebd98aSStefan Weil void uuid_unparse(const uuid_t uu, char *out) 1399aebd98aSStefan Weil { 1409aebd98aSStefan Weil snprintf(out, 37, UUID_FMT, 1419aebd98aSStefan Weil uu[0], uu[1], uu[2], uu[3], uu[4], uu[5], uu[6], uu[7], 1429aebd98aSStefan Weil uu[8], uu[9], uu[10], uu[11], uu[12], uu[13], uu[14], uu[15]); 1439aebd98aSStefan Weil } 1449aebd98aSStefan Weil #endif 1459aebd98aSStefan Weil 1469aebd98aSStefan Weil typedef struct { 1479aebd98aSStefan Weil char text[0x40]; 1489aebd98aSStefan Weil uint32_t signature; 1499aebd98aSStefan Weil uint32_t version; 1509aebd98aSStefan Weil uint32_t header_size; 1519aebd98aSStefan Weil uint32_t image_type; 1529aebd98aSStefan Weil uint32_t image_flags; 1539aebd98aSStefan Weil char description[256]; 1549aebd98aSStefan Weil uint32_t offset_bmap; 1559aebd98aSStefan Weil uint32_t offset_data; 1569aebd98aSStefan Weil uint32_t cylinders; /* disk geometry, unused here */ 1579aebd98aSStefan Weil uint32_t heads; /* disk geometry, unused here */ 1589aebd98aSStefan Weil uint32_t sectors; /* disk geometry, unused here */ 1599aebd98aSStefan Weil uint32_t sector_size; 1609aebd98aSStefan Weil uint32_t unused1; 1619aebd98aSStefan Weil uint64_t disk_size; 1629aebd98aSStefan Weil uint32_t block_size; 1639aebd98aSStefan Weil uint32_t block_extra; /* unused here */ 1649aebd98aSStefan Weil uint32_t blocks_in_image; 1659aebd98aSStefan Weil uint32_t blocks_allocated; 1669aebd98aSStefan Weil uuid_t uuid_image; 1679aebd98aSStefan Weil uuid_t uuid_last_snap; 1689aebd98aSStefan Weil uuid_t uuid_link; 1699aebd98aSStefan Weil uuid_t uuid_parent; 1709aebd98aSStefan Weil uint64_t unused2[7]; 1719aebd98aSStefan Weil } VdiHeader; 1729aebd98aSStefan Weil 1739aebd98aSStefan Weil typedef struct { 1749aebd98aSStefan Weil /* The block map entries are little endian (even in memory). */ 1759aebd98aSStefan Weil uint32_t *bmap; 1769aebd98aSStefan Weil /* Size of block (bytes). */ 1779aebd98aSStefan Weil uint32_t block_size; 1789aebd98aSStefan Weil /* Size of block (sectors). */ 1799aebd98aSStefan Weil uint32_t block_sectors; 1809aebd98aSStefan Weil /* First sector of block map. */ 1819aebd98aSStefan Weil uint32_t bmap_sector; 1824ff9786cSStefan Weil /* VDI header (converted to host endianness). */ 1839aebd98aSStefan Weil VdiHeader header; 184fc9d106cSKevin Wolf 185fc9d106cSKevin Wolf Error *migration_blocker; 1869aebd98aSStefan Weil } BDRVVdiState; 1879aebd98aSStefan Weil 1889aebd98aSStefan Weil /* Change UUID from little endian (IPRT = VirtualBox format) to big endian 1899aebd98aSStefan Weil * format (network byte order, standard, see RFC 4122) and vice versa. 1909aebd98aSStefan Weil */ 1919aebd98aSStefan Weil static void uuid_convert(uuid_t uuid) 1929aebd98aSStefan Weil { 1939aebd98aSStefan Weil bswap32s((uint32_t *)&uuid[0]); 1949aebd98aSStefan Weil bswap16s((uint16_t *)&uuid[4]); 1959aebd98aSStefan Weil bswap16s((uint16_t *)&uuid[6]); 1969aebd98aSStefan Weil } 1979aebd98aSStefan Weil 1989aebd98aSStefan Weil static void vdi_header_to_cpu(VdiHeader *header) 1999aebd98aSStefan Weil { 2009aebd98aSStefan Weil le32_to_cpus(&header->signature); 2019aebd98aSStefan Weil le32_to_cpus(&header->version); 2029aebd98aSStefan Weil le32_to_cpus(&header->header_size); 2039aebd98aSStefan Weil le32_to_cpus(&header->image_type); 2049aebd98aSStefan Weil le32_to_cpus(&header->image_flags); 2059aebd98aSStefan Weil le32_to_cpus(&header->offset_bmap); 2069aebd98aSStefan Weil le32_to_cpus(&header->offset_data); 2079aebd98aSStefan Weil le32_to_cpus(&header->cylinders); 2089aebd98aSStefan Weil le32_to_cpus(&header->heads); 2099aebd98aSStefan Weil le32_to_cpus(&header->sectors); 2109aebd98aSStefan Weil le32_to_cpus(&header->sector_size); 2119aebd98aSStefan Weil le64_to_cpus(&header->disk_size); 2129aebd98aSStefan Weil le32_to_cpus(&header->block_size); 2139aebd98aSStefan Weil le32_to_cpus(&header->block_extra); 2149aebd98aSStefan Weil le32_to_cpus(&header->blocks_in_image); 2159aebd98aSStefan Weil le32_to_cpus(&header->blocks_allocated); 2169aebd98aSStefan Weil uuid_convert(header->uuid_image); 2179aebd98aSStefan Weil uuid_convert(header->uuid_last_snap); 2189aebd98aSStefan Weil uuid_convert(header->uuid_link); 2199aebd98aSStefan Weil uuid_convert(header->uuid_parent); 2209aebd98aSStefan Weil } 2219aebd98aSStefan Weil 2229aebd98aSStefan Weil static void vdi_header_to_le(VdiHeader *header) 2239aebd98aSStefan Weil { 2249aebd98aSStefan Weil cpu_to_le32s(&header->signature); 2259aebd98aSStefan Weil cpu_to_le32s(&header->version); 2269aebd98aSStefan Weil cpu_to_le32s(&header->header_size); 2279aebd98aSStefan Weil cpu_to_le32s(&header->image_type); 2289aebd98aSStefan Weil cpu_to_le32s(&header->image_flags); 2299aebd98aSStefan Weil cpu_to_le32s(&header->offset_bmap); 2309aebd98aSStefan Weil cpu_to_le32s(&header->offset_data); 2319aebd98aSStefan Weil cpu_to_le32s(&header->cylinders); 2329aebd98aSStefan Weil cpu_to_le32s(&header->heads); 2339aebd98aSStefan Weil cpu_to_le32s(&header->sectors); 2349aebd98aSStefan Weil cpu_to_le32s(&header->sector_size); 2359aebd98aSStefan Weil cpu_to_le64s(&header->disk_size); 2369aebd98aSStefan Weil cpu_to_le32s(&header->block_size); 2379aebd98aSStefan Weil cpu_to_le32s(&header->block_extra); 2389aebd98aSStefan Weil cpu_to_le32s(&header->blocks_in_image); 2399aebd98aSStefan Weil cpu_to_le32s(&header->blocks_allocated); 2409aebd98aSStefan Weil cpu_to_le32s(&header->blocks_allocated); 2419aebd98aSStefan Weil uuid_convert(header->uuid_image); 2429aebd98aSStefan Weil uuid_convert(header->uuid_last_snap); 2439aebd98aSStefan Weil uuid_convert(header->uuid_link); 2449aebd98aSStefan Weil uuid_convert(header->uuid_parent); 2459aebd98aSStefan Weil } 2469aebd98aSStefan Weil 2479aebd98aSStefan Weil #if defined(CONFIG_VDI_DEBUG) 2489aebd98aSStefan Weil static void vdi_header_print(VdiHeader *header) 2499aebd98aSStefan Weil { 2509aebd98aSStefan Weil char uuid[37]; 2519aebd98aSStefan Weil logout("text %s", header->text); 2529aebd98aSStefan Weil logout("signature 0x%04x\n", header->signature); 2539aebd98aSStefan Weil logout("header size 0x%04x\n", header->header_size); 2549aebd98aSStefan Weil logout("image type 0x%04x\n", header->image_type); 2559aebd98aSStefan Weil logout("image flags 0x%04x\n", header->image_flags); 2569aebd98aSStefan Weil logout("description %s\n", header->description); 2579aebd98aSStefan Weil logout("offset bmap 0x%04x\n", header->offset_bmap); 2589aebd98aSStefan Weil logout("offset data 0x%04x\n", header->offset_data); 2599aebd98aSStefan Weil logout("cylinders 0x%04x\n", header->cylinders); 2609aebd98aSStefan Weil logout("heads 0x%04x\n", header->heads); 2619aebd98aSStefan Weil logout("sectors 0x%04x\n", header->sectors); 2629aebd98aSStefan Weil logout("sector size 0x%04x\n", header->sector_size); 2639aebd98aSStefan Weil logout("image size 0x%" PRIx64 " B (%" PRIu64 " MiB)\n", 2649aebd98aSStefan Weil header->disk_size, header->disk_size / MiB); 2659aebd98aSStefan Weil logout("block size 0x%04x\n", header->block_size); 2669aebd98aSStefan Weil logout("block extra 0x%04x\n", header->block_extra); 2679aebd98aSStefan Weil logout("blocks tot. 0x%04x\n", header->blocks_in_image); 2689aebd98aSStefan Weil logout("blocks all. 0x%04x\n", header->blocks_allocated); 2699aebd98aSStefan Weil uuid_unparse(header->uuid_image, uuid); 2709aebd98aSStefan Weil logout("uuid image %s\n", uuid); 2719aebd98aSStefan Weil uuid_unparse(header->uuid_last_snap, uuid); 2729aebd98aSStefan Weil logout("uuid snap %s\n", uuid); 2739aebd98aSStefan Weil uuid_unparse(header->uuid_link, uuid); 2749aebd98aSStefan Weil logout("uuid link %s\n", uuid); 2759aebd98aSStefan Weil uuid_unparse(header->uuid_parent, uuid); 2769aebd98aSStefan Weil logout("uuid parent %s\n", uuid); 2779aebd98aSStefan Weil } 2789aebd98aSStefan Weil #endif 2799aebd98aSStefan Weil 2809ac228e0SKevin Wolf static int vdi_check(BlockDriverState *bs, BdrvCheckResult *res) 2819aebd98aSStefan Weil { 2829aebd98aSStefan Weil /* TODO: additional checks possible. */ 2839aebd98aSStefan Weil BDRVVdiState *s = (BDRVVdiState *)bs->opaque; 2849aebd98aSStefan Weil uint32_t blocks_allocated = 0; 2859aebd98aSStefan Weil uint32_t block; 2869aebd98aSStefan Weil uint32_t *bmap; 2879aebd98aSStefan Weil logout("\n"); 2889aebd98aSStefan Weil 2897267c094SAnthony Liguori bmap = g_malloc(s->header.blocks_in_image * sizeof(uint32_t)); 2909aebd98aSStefan Weil memset(bmap, 0xff, s->header.blocks_in_image * sizeof(uint32_t)); 2919aebd98aSStefan Weil 2929aebd98aSStefan Weil /* Check block map and value of blocks_allocated. */ 2939aebd98aSStefan Weil for (block = 0; block < s->header.blocks_in_image; block++) { 2949aebd98aSStefan Weil uint32_t bmap_entry = le32_to_cpu(s->bmap[block]); 295c794b4e0SEric Sunshine if (VDI_IS_ALLOCATED(bmap_entry)) { 2969aebd98aSStefan Weil if (bmap_entry < s->header.blocks_in_image) { 2979aebd98aSStefan Weil blocks_allocated++; 298c794b4e0SEric Sunshine if (!VDI_IS_ALLOCATED(bmap[bmap_entry])) { 2999aebd98aSStefan Weil bmap[bmap_entry] = bmap_entry; 3009aebd98aSStefan Weil } else { 3019aebd98aSStefan Weil fprintf(stderr, "ERROR: block index %" PRIu32 3029aebd98aSStefan Weil " also used by %" PRIu32 "\n", bmap[bmap_entry], bmap_entry); 3039ac228e0SKevin Wolf res->corruptions++; 3049aebd98aSStefan Weil } 3059aebd98aSStefan Weil } else { 3069aebd98aSStefan Weil fprintf(stderr, "ERROR: block index %" PRIu32 3079aebd98aSStefan Weil " too large, is %" PRIu32 "\n", block, bmap_entry); 3089ac228e0SKevin Wolf res->corruptions++; 3099aebd98aSStefan Weil } 3109aebd98aSStefan Weil } 3119aebd98aSStefan Weil } 3129aebd98aSStefan Weil if (blocks_allocated != s->header.blocks_allocated) { 3139aebd98aSStefan Weil fprintf(stderr, "ERROR: allocated blocks mismatch, is %" PRIu32 3149aebd98aSStefan Weil ", should be %" PRIu32 "\n", 3159aebd98aSStefan Weil blocks_allocated, s->header.blocks_allocated); 3169ac228e0SKevin Wolf res->corruptions++; 3179aebd98aSStefan Weil } 3189aebd98aSStefan Weil 3197267c094SAnthony Liguori g_free(bmap); 3209aebd98aSStefan Weil 3219ac228e0SKevin Wolf return 0; 3229aebd98aSStefan Weil } 3239aebd98aSStefan Weil 3249aebd98aSStefan Weil static int vdi_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) 3259aebd98aSStefan Weil { 3269aebd98aSStefan Weil /* TODO: vdi_get_info would be needed for machine snapshots. 3279aebd98aSStefan Weil vm_state_offset is still missing. */ 3289aebd98aSStefan Weil BDRVVdiState *s = (BDRVVdiState *)bs->opaque; 3299aebd98aSStefan Weil logout("\n"); 3309aebd98aSStefan Weil bdi->cluster_size = s->block_size; 3319aebd98aSStefan Weil bdi->vm_state_offset = 0; 3329aebd98aSStefan Weil return 0; 3339aebd98aSStefan Weil } 3349aebd98aSStefan Weil 3359aebd98aSStefan Weil static int vdi_make_empty(BlockDriverState *bs) 3369aebd98aSStefan Weil { 3379aebd98aSStefan Weil /* TODO: missing code. */ 3389aebd98aSStefan Weil logout("\n"); 3399aebd98aSStefan Weil /* The return value for missing code must be 0, see block.c. */ 3409aebd98aSStefan Weil return 0; 3419aebd98aSStefan Weil } 3429aebd98aSStefan Weil 3439aebd98aSStefan Weil static int vdi_probe(const uint8_t *buf, int buf_size, const char *filename) 3449aebd98aSStefan Weil { 3459aebd98aSStefan Weil const VdiHeader *header = (const VdiHeader *)buf; 3469aebd98aSStefan Weil int result = 0; 3479aebd98aSStefan Weil 3489aebd98aSStefan Weil logout("\n"); 3499aebd98aSStefan Weil 3509aebd98aSStefan Weil if (buf_size < sizeof(*header)) { 3519aebd98aSStefan Weil /* Header too small, no VDI. */ 3529aebd98aSStefan Weil } else if (le32_to_cpu(header->signature) == VDI_SIGNATURE) { 3539aebd98aSStefan Weil result = 100; 3549aebd98aSStefan Weil } 3559aebd98aSStefan Weil 3569aebd98aSStefan Weil if (result == 0) { 3579aebd98aSStefan Weil logout("no vdi image\n"); 3589aebd98aSStefan Weil } else { 3599aebd98aSStefan Weil logout("%s", header->text); 3609aebd98aSStefan Weil } 3619aebd98aSStefan Weil 3629aebd98aSStefan Weil return result; 3639aebd98aSStefan Weil } 3649aebd98aSStefan Weil 36566f82ceeSKevin Wolf static int vdi_open(BlockDriverState *bs, int flags) 3669aebd98aSStefan Weil { 3679aebd98aSStefan Weil BDRVVdiState *s = bs->opaque; 3689aebd98aSStefan Weil VdiHeader header; 3699aebd98aSStefan Weil size_t bmap_size; 3709aebd98aSStefan Weil 3719aebd98aSStefan Weil logout("\n"); 3729aebd98aSStefan Weil 37366f82ceeSKevin Wolf if (bdrv_read(bs->file, 0, (uint8_t *)&header, 1) < 0) { 3749aebd98aSStefan Weil goto fail; 3759aebd98aSStefan Weil } 3769aebd98aSStefan Weil 3779aebd98aSStefan Weil vdi_header_to_cpu(&header); 3789aebd98aSStefan Weil #if defined(CONFIG_VDI_DEBUG) 3799aebd98aSStefan Weil vdi_header_print(&header); 3809aebd98aSStefan Weil #endif 3819aebd98aSStefan Weil 382f21dc3a4SStefan Weil if (header.disk_size % SECTOR_SIZE != 0) { 383f21dc3a4SStefan Weil /* 'VBoxManage convertfromraw' can create images with odd disk sizes. 384f21dc3a4SStefan Weil We accept them but round the disk size to the next multiple of 385f21dc3a4SStefan Weil SECTOR_SIZE. */ 386f21dc3a4SStefan Weil logout("odd disk size %" PRIu64 " B, round up\n", header.disk_size); 387f21dc3a4SStefan Weil header.disk_size += SECTOR_SIZE - 1; 388f21dc3a4SStefan Weil header.disk_size &= ~(SECTOR_SIZE - 1); 389f21dc3a4SStefan Weil } 390f21dc3a4SStefan Weil 3919aebd98aSStefan Weil if (header.version != VDI_VERSION_1_1) { 3929aebd98aSStefan Weil logout("unsupported version %u.%u\n", 3939aebd98aSStefan Weil header.version >> 16, header.version & 0xffff); 3949aebd98aSStefan Weil goto fail; 3959aebd98aSStefan Weil } else if (header.offset_bmap % SECTOR_SIZE != 0) { 3969aebd98aSStefan Weil /* We only support block maps which start on a sector boundary. */ 3979aebd98aSStefan Weil logout("unsupported block map offset 0x%x B\n", header.offset_bmap); 3989aebd98aSStefan Weil goto fail; 3999aebd98aSStefan Weil } else if (header.offset_data % SECTOR_SIZE != 0) { 4009aebd98aSStefan Weil /* We only support data blocks which start on a sector boundary. */ 4019aebd98aSStefan Weil logout("unsupported data offset 0x%x B\n", header.offset_data); 4029aebd98aSStefan Weil goto fail; 4039aebd98aSStefan Weil } else if (header.sector_size != SECTOR_SIZE) { 4049aebd98aSStefan Weil logout("unsupported sector size %u B\n", header.sector_size); 4059aebd98aSStefan Weil goto fail; 4069aebd98aSStefan Weil } else if (header.block_size != 1 * MiB) { 4079aebd98aSStefan Weil logout("unsupported block size %u B\n", header.block_size); 4089aebd98aSStefan Weil goto fail; 409f21dc3a4SStefan Weil } else if (header.disk_size > 410f21dc3a4SStefan Weil (uint64_t)header.blocks_in_image * header.block_size) { 411f21dc3a4SStefan Weil logout("unsupported disk size %" PRIu64 " B\n", header.disk_size); 4129aebd98aSStefan Weil goto fail; 4139aebd98aSStefan Weil } else if (!uuid_is_null(header.uuid_link)) { 4149aebd98aSStefan Weil logout("link uuid != 0, unsupported\n"); 4159aebd98aSStefan Weil goto fail; 4169aebd98aSStefan Weil } else if (!uuid_is_null(header.uuid_parent)) { 4179aebd98aSStefan Weil logout("parent uuid != 0, unsupported\n"); 4189aebd98aSStefan Weil goto fail; 4199aebd98aSStefan Weil } 4209aebd98aSStefan Weil 4219aebd98aSStefan Weil bs->total_sectors = header.disk_size / SECTOR_SIZE; 4229aebd98aSStefan Weil 4239aebd98aSStefan Weil s->block_size = header.block_size; 4249aebd98aSStefan Weil s->block_sectors = header.block_size / SECTOR_SIZE; 4259aebd98aSStefan Weil s->bmap_sector = header.offset_bmap / SECTOR_SIZE; 4269aebd98aSStefan Weil s->header = header; 4279aebd98aSStefan Weil 4289aebd98aSStefan Weil bmap_size = header.blocks_in_image * sizeof(uint32_t); 4296eea90ebSStefan Weil bmap_size = (bmap_size + SECTOR_SIZE - 1) / SECTOR_SIZE; 430b76b6e95SStefan Weil if (bmap_size > 0) { 4317267c094SAnthony Liguori s->bmap = g_malloc(bmap_size * SECTOR_SIZE); 432b76b6e95SStefan Weil } 43366f82ceeSKevin Wolf if (bdrv_read(bs->file, s->bmap_sector, (uint8_t *)s->bmap, bmap_size) < 0) { 4349aebd98aSStefan Weil goto fail_free_bmap; 4359aebd98aSStefan Weil } 4369aebd98aSStefan Weil 437fc9d106cSKevin Wolf /* Disable migration when vdi images are used */ 438fc9d106cSKevin Wolf error_set(&s->migration_blocker, 439fc9d106cSKevin Wolf QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED, 440fc9d106cSKevin Wolf "vdi", bs->device_name, "live migration"); 441fc9d106cSKevin Wolf migrate_add_blocker(s->migration_blocker); 442fc9d106cSKevin Wolf 4439aebd98aSStefan Weil return 0; 4449aebd98aSStefan Weil 4459aebd98aSStefan Weil fail_free_bmap: 4467267c094SAnthony Liguori g_free(s->bmap); 4479aebd98aSStefan Weil 4489aebd98aSStefan Weil fail: 4499aebd98aSStefan Weil return -1; 4509aebd98aSStefan Weil } 4519aebd98aSStefan Weil 452e850b35aSStefan Hajnoczi static int coroutine_fn vdi_co_is_allocated(BlockDriverState *bs, 453e850b35aSStefan Hajnoczi int64_t sector_num, int nb_sectors, int *pnum) 4549aebd98aSStefan Weil { 4559aebd98aSStefan Weil /* TODO: Check for too large sector_num (in bdrv_is_allocated or here). */ 4569aebd98aSStefan Weil BDRVVdiState *s = (BDRVVdiState *)bs->opaque; 4579aebd98aSStefan Weil size_t bmap_index = sector_num / s->block_sectors; 4589aebd98aSStefan Weil size_t sector_in_block = sector_num % s->block_sectors; 4599aebd98aSStefan Weil int n_sectors = s->block_sectors - sector_in_block; 4609aebd98aSStefan Weil uint32_t bmap_entry = le32_to_cpu(s->bmap[bmap_index]); 4619aebd98aSStefan Weil logout("%p, %" PRId64 ", %d, %p\n", bs, sector_num, nb_sectors, pnum); 4629aebd98aSStefan Weil if (n_sectors > nb_sectors) { 4639aebd98aSStefan Weil n_sectors = nb_sectors; 4649aebd98aSStefan Weil } 4659aebd98aSStefan Weil *pnum = n_sectors; 466c794b4e0SEric Sunshine return VDI_IS_ALLOCATED(bmap_entry); 4679aebd98aSStefan Weil } 4689aebd98aSStefan Weil 469*a7a43aa1SPaolo Bonzini static int vdi_co_read(BlockDriverState *bs, 470*a7a43aa1SPaolo Bonzini int64_t sector_num, uint8_t *buf, int nb_sectors) 4719aebd98aSStefan Weil { 4729aebd98aSStefan Weil BDRVVdiState *s = bs->opaque; 4739aebd98aSStefan Weil uint32_t bmap_entry; 4749aebd98aSStefan Weil uint32_t block_index; 4759aebd98aSStefan Weil uint32_t sector_in_block; 4769aebd98aSStefan Weil uint32_t n_sectors; 477bfc45fc1SPaolo Bonzini struct iovec hd_iov; 478bfc45fc1SPaolo Bonzini QEMUIOVector hd_qiov; 4794de659e8SPaolo Bonzini int ret; 4804de659e8SPaolo Bonzini 4814de659e8SPaolo Bonzini logout("\n"); 4829aebd98aSStefan Weil 4833d46a75aSPaolo Bonzini restart: 484bfc45fc1SPaolo Bonzini block_index = sector_num / s->block_sectors; 485bfc45fc1SPaolo Bonzini sector_in_block = sector_num % s->block_sectors; 4869aebd98aSStefan Weil n_sectors = s->block_sectors - sector_in_block; 487bfc45fc1SPaolo Bonzini if (n_sectors > nb_sectors) { 488bfc45fc1SPaolo Bonzini n_sectors = nb_sectors; 4899aebd98aSStefan Weil } 4909aebd98aSStefan Weil 4919aebd98aSStefan Weil logout("will read %u sectors starting at sector %" PRIu64 "\n", 492bfc45fc1SPaolo Bonzini n_sectors, sector_num); 4939aebd98aSStefan Weil 4949aebd98aSStefan Weil /* prepare next AIO request */ 4959aebd98aSStefan Weil bmap_entry = le32_to_cpu(s->bmap[block_index]); 496c794b4e0SEric Sunshine if (!VDI_IS_ALLOCATED(bmap_entry)) { 4979aebd98aSStefan Weil /* Block not allocated, return zeros, no need to wait. */ 498*a7a43aa1SPaolo Bonzini memset(buf, 0, n_sectors * SECTOR_SIZE); 4993d46a75aSPaolo Bonzini ret = 0; 5009aebd98aSStefan Weil } else { 5019aebd98aSStefan Weil uint64_t offset = s->header.offset_data / SECTOR_SIZE + 5029aebd98aSStefan Weil (uint64_t)bmap_entry * s->block_sectors + 5039aebd98aSStefan Weil sector_in_block; 504*a7a43aa1SPaolo Bonzini hd_iov.iov_base = (void *)buf; 505bfc45fc1SPaolo Bonzini hd_iov.iov_len = n_sectors * SECTOR_SIZE; 506bfc45fc1SPaolo Bonzini qemu_iovec_init_external(&hd_qiov, &hd_iov, 1); 507bfc45fc1SPaolo Bonzini ret = bdrv_co_readv(bs->file, offset, n_sectors, &hd_qiov); 5089aebd98aSStefan Weil } 509bfc45fc1SPaolo Bonzini logout("%u sectors read\n", n_sectors); 5100c7bfc32SPaolo Bonzini 511bfc45fc1SPaolo Bonzini nb_sectors -= n_sectors; 512bfc45fc1SPaolo Bonzini sector_num += n_sectors; 513*a7a43aa1SPaolo Bonzini buf += n_sectors * SECTOR_SIZE; 5140c7bfc32SPaolo Bonzini 515bfc45fc1SPaolo Bonzini if (ret >= 0 && nb_sectors > 0) { 5163d46a75aSPaolo Bonzini goto restart; 5173d46a75aSPaolo Bonzini } 5183d46a75aSPaolo Bonzini 5193d46a75aSPaolo Bonzini return ret; 5209aebd98aSStefan Weil } 5219aebd98aSStefan Weil 522*a7a43aa1SPaolo Bonzini static int vdi_co_write(BlockDriverState *bs, 523*a7a43aa1SPaolo Bonzini int64_t sector_num, const uint8_t *buf, int nb_sectors) 5249aebd98aSStefan Weil { 5259aebd98aSStefan Weil BDRVVdiState *s = bs->opaque; 5269aebd98aSStefan Weil uint32_t bmap_entry; 5279aebd98aSStefan Weil uint32_t block_index; 5289aebd98aSStefan Weil uint32_t sector_in_block; 5299aebd98aSStefan Weil uint32_t n_sectors; 530bfc45fc1SPaolo Bonzini uint32_t bmap_first = VDI_UNALLOCATED; 531bfc45fc1SPaolo Bonzini uint32_t bmap_last = VDI_UNALLOCATED; 532bfc45fc1SPaolo Bonzini struct iovec hd_iov; 533bfc45fc1SPaolo Bonzini QEMUIOVector hd_qiov; 534bfc45fc1SPaolo Bonzini uint8_t *block = NULL; 5354de659e8SPaolo Bonzini int ret; 5364de659e8SPaolo Bonzini 5374de659e8SPaolo Bonzini logout("\n"); 5389aebd98aSStefan Weil 5393d46a75aSPaolo Bonzini restart: 540bfc45fc1SPaolo Bonzini block_index = sector_num / s->block_sectors; 541bfc45fc1SPaolo Bonzini sector_in_block = sector_num % s->block_sectors; 5429aebd98aSStefan Weil n_sectors = s->block_sectors - sector_in_block; 543bfc45fc1SPaolo Bonzini if (n_sectors > nb_sectors) { 544bfc45fc1SPaolo Bonzini n_sectors = nb_sectors; 5459aebd98aSStefan Weil } 5469aebd98aSStefan Weil 5479aebd98aSStefan Weil logout("will write %u sectors starting at sector %" PRIu64 "\n", 548bfc45fc1SPaolo Bonzini n_sectors, sector_num); 5499aebd98aSStefan Weil 5509aebd98aSStefan Weil /* prepare next AIO request */ 5519aebd98aSStefan Weil bmap_entry = le32_to_cpu(s->bmap[block_index]); 552c794b4e0SEric Sunshine if (!VDI_IS_ALLOCATED(bmap_entry)) { 5539aebd98aSStefan Weil /* Allocate new block and write to it. */ 5549aebd98aSStefan Weil uint64_t offset; 5559aebd98aSStefan Weil bmap_entry = s->header.blocks_allocated; 5569aebd98aSStefan Weil s->bmap[block_index] = cpu_to_le32(bmap_entry); 5579aebd98aSStefan Weil s->header.blocks_allocated++; 5589aebd98aSStefan Weil offset = s->header.offset_data / SECTOR_SIZE + 5599aebd98aSStefan Weil (uint64_t)bmap_entry * s->block_sectors; 5609aebd98aSStefan Weil if (block == NULL) { 561641543b7SStefan Weil block = g_malloc(s->block_size); 562bfc45fc1SPaolo Bonzini bmap_first = block_index; 5639aebd98aSStefan Weil } 564bfc45fc1SPaolo Bonzini bmap_last = block_index; 565641543b7SStefan Weil /* Copy data to be written to new block and zero unused parts. */ 566641543b7SStefan Weil memset(block, 0, sector_in_block * SECTOR_SIZE); 5679aebd98aSStefan Weil memcpy(block + sector_in_block * SECTOR_SIZE, 568*a7a43aa1SPaolo Bonzini buf, n_sectors * SECTOR_SIZE); 569641543b7SStefan Weil memset(block + (sector_in_block + n_sectors) * SECTOR_SIZE, 0, 570641543b7SStefan Weil (s->block_sectors - n_sectors - sector_in_block) * SECTOR_SIZE); 571bfc45fc1SPaolo Bonzini hd_iov.iov_base = (void *)block; 572bfc45fc1SPaolo Bonzini hd_iov.iov_len = s->block_size; 573bfc45fc1SPaolo Bonzini qemu_iovec_init_external(&hd_qiov, &hd_iov, 1); 574bfc45fc1SPaolo Bonzini ret = bdrv_co_writev(bs->file, offset, s->block_sectors, &hd_qiov); 5759aebd98aSStefan Weil } else { 5769aebd98aSStefan Weil uint64_t offset = s->header.offset_data / SECTOR_SIZE + 5779aebd98aSStefan Weil (uint64_t)bmap_entry * s->block_sectors + 5789aebd98aSStefan Weil sector_in_block; 579*a7a43aa1SPaolo Bonzini hd_iov.iov_base = (void *)buf; 580bfc45fc1SPaolo Bonzini hd_iov.iov_len = n_sectors * SECTOR_SIZE; 581bfc45fc1SPaolo Bonzini qemu_iovec_init_external(&hd_qiov, &hd_iov, 1); 582bfc45fc1SPaolo Bonzini ret = bdrv_co_writev(bs->file, offset, n_sectors, &hd_qiov); 5839aebd98aSStefan Weil } 5840c7bfc32SPaolo Bonzini 585bfc45fc1SPaolo Bonzini nb_sectors -= n_sectors; 586bfc45fc1SPaolo Bonzini sector_num += n_sectors; 587*a7a43aa1SPaolo Bonzini buf += n_sectors * SECTOR_SIZE; 5880c7bfc32SPaolo Bonzini 589bfc45fc1SPaolo Bonzini logout("%u sectors written\n", n_sectors); 590bfc45fc1SPaolo Bonzini if (ret >= 0 && nb_sectors > 0) { 5913d46a75aSPaolo Bonzini goto restart; 5923d46a75aSPaolo Bonzini } 5939aebd98aSStefan Weil 5940c7bfc32SPaolo Bonzini logout("finished data write\n"); 5950c7bfc32SPaolo Bonzini if (ret >= 0) { 5960c7bfc32SPaolo Bonzini ret = 0; 597bfc45fc1SPaolo Bonzini if (block) { 598bfc45fc1SPaolo Bonzini VdiHeader *header = (VdiHeader *) block; 5990c7bfc32SPaolo Bonzini logout("now writing modified header\n"); 600bfc45fc1SPaolo Bonzini assert(VDI_IS_ALLOCATED(bmap_first)); 6010c7bfc32SPaolo Bonzini *header = s->header; 6020c7bfc32SPaolo Bonzini vdi_header_to_le(header); 603bfc45fc1SPaolo Bonzini hd_iov.iov_base = block; 604bfc45fc1SPaolo Bonzini hd_iov.iov_len = SECTOR_SIZE; 605bfc45fc1SPaolo Bonzini qemu_iovec_init_external(&hd_qiov, &hd_iov, 1); 606bfc45fc1SPaolo Bonzini ret = bdrv_co_writev(bs->file, 0, 1, &hd_qiov); 6070c7bfc32SPaolo Bonzini } 608bfc45fc1SPaolo Bonzini g_free(block); 609bfc45fc1SPaolo Bonzini block = NULL; 610bfc45fc1SPaolo Bonzini if (ret >= 0 && VDI_IS_ALLOCATED(bmap_first)) { 6110c7bfc32SPaolo Bonzini /* One or more new blocks were allocated. */ 6120c7bfc32SPaolo Bonzini uint64_t offset; 6130c7bfc32SPaolo Bonzini logout("now writing modified block map entry %u...%u\n", 6140c7bfc32SPaolo Bonzini bmap_first, bmap_last); 6150c7bfc32SPaolo Bonzini /* Write modified sectors from block map. */ 6160c7bfc32SPaolo Bonzini bmap_first /= (SECTOR_SIZE / sizeof(uint32_t)); 6170c7bfc32SPaolo Bonzini bmap_last /= (SECTOR_SIZE / sizeof(uint32_t)); 6180c7bfc32SPaolo Bonzini n_sectors = bmap_last - bmap_first + 1; 6190c7bfc32SPaolo Bonzini offset = s->bmap_sector + bmap_first; 620bfc45fc1SPaolo Bonzini hd_iov.iov_base = (void *)((uint8_t *)&s->bmap[0] + 6210c7bfc32SPaolo Bonzini bmap_first * SECTOR_SIZE); 622bfc45fc1SPaolo Bonzini hd_iov.iov_len = n_sectors * SECTOR_SIZE; 623bfc45fc1SPaolo Bonzini qemu_iovec_init_external(&hd_qiov, &hd_iov, 1); 6240c7bfc32SPaolo Bonzini logout("will write %u block map sectors starting from entry %u\n", 6250c7bfc32SPaolo Bonzini n_sectors, bmap_first); 626bfc45fc1SPaolo Bonzini ret = bdrv_co_writev(bs->file, offset, n_sectors, &hd_qiov); 6270c7bfc32SPaolo Bonzini } 6280c7bfc32SPaolo Bonzini } 6290c7bfc32SPaolo Bonzini 6303d46a75aSPaolo Bonzini return ret; 6319aebd98aSStefan Weil } 6329aebd98aSStefan Weil 6339aebd98aSStefan Weil static int vdi_create(const char *filename, QEMUOptionParameter *options) 6349aebd98aSStefan Weil { 6359aebd98aSStefan Weil int fd; 6369aebd98aSStefan Weil int result = 0; 6379aebd98aSStefan Weil uint64_t bytes = 0; 6389aebd98aSStefan Weil uint32_t blocks; 63999cce9faSKevin Wolf size_t block_size = DEFAULT_CLUSTER_SIZE; 6409aebd98aSStefan Weil uint32_t image_type = VDI_TYPE_DYNAMIC; 6419aebd98aSStefan Weil VdiHeader header; 6429aebd98aSStefan Weil size_t i; 6439aebd98aSStefan Weil size_t bmap_size; 6449aebd98aSStefan Weil uint32_t *bmap; 6459aebd98aSStefan Weil 6469aebd98aSStefan Weil logout("\n"); 6479aebd98aSStefan Weil 6489aebd98aSStefan Weil /* Read out options. */ 6499aebd98aSStefan Weil while (options && options->name) { 6509aebd98aSStefan Weil if (!strcmp(options->name, BLOCK_OPT_SIZE)) { 6519aebd98aSStefan Weil bytes = options->value.n; 6529aebd98aSStefan Weil #if defined(CONFIG_VDI_BLOCK_SIZE) 6539aebd98aSStefan Weil } else if (!strcmp(options->name, BLOCK_OPT_CLUSTER_SIZE)) { 6549aebd98aSStefan Weil if (options->value.n) { 6559aebd98aSStefan Weil /* TODO: Additional checks (SECTOR_SIZE * 2^n, ...). */ 6569aebd98aSStefan Weil block_size = options->value.n; 6579aebd98aSStefan Weil } 6589aebd98aSStefan Weil #endif 6599aebd98aSStefan Weil #if defined(CONFIG_VDI_STATIC_IMAGE) 6609aebd98aSStefan Weil } else if (!strcmp(options->name, BLOCK_OPT_STATIC)) { 6616eea90ebSStefan Weil if (options->value.n) { 6629aebd98aSStefan Weil image_type = VDI_TYPE_STATIC; 6636eea90ebSStefan Weil } 6649aebd98aSStefan Weil #endif 6659aebd98aSStefan Weil } 6669aebd98aSStefan Weil options++; 6679aebd98aSStefan Weil } 6689aebd98aSStefan Weil 6699aebd98aSStefan Weil fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE, 6709aebd98aSStefan Weil 0644); 6719aebd98aSStefan Weil if (fd < 0) { 6729aebd98aSStefan Weil return -errno; 6739aebd98aSStefan Weil } 6749aebd98aSStefan Weil 675f21dc3a4SStefan Weil /* We need enough blocks to store the given disk size, 676f21dc3a4SStefan Weil so always round up. */ 677f21dc3a4SStefan Weil blocks = (bytes + block_size - 1) / block_size; 678f21dc3a4SStefan Weil 6799aebd98aSStefan Weil bmap_size = blocks * sizeof(uint32_t); 6809aebd98aSStefan Weil bmap_size = ((bmap_size + SECTOR_SIZE - 1) & ~(SECTOR_SIZE -1)); 6819aebd98aSStefan Weil 6829aebd98aSStefan Weil memset(&header, 0, sizeof(header)); 6831786dc15SBlue Swirl pstrcpy(header.text, sizeof(header.text), VDI_TEXT); 6849aebd98aSStefan Weil header.signature = VDI_SIGNATURE; 6859aebd98aSStefan Weil header.version = VDI_VERSION_1_1; 6869aebd98aSStefan Weil header.header_size = 0x180; 6879aebd98aSStefan Weil header.image_type = image_type; 6889aebd98aSStefan Weil header.offset_bmap = 0x200; 6899aebd98aSStefan Weil header.offset_data = 0x200 + bmap_size; 6909aebd98aSStefan Weil header.sector_size = SECTOR_SIZE; 6919aebd98aSStefan Weil header.disk_size = bytes; 6929aebd98aSStefan Weil header.block_size = block_size; 6939aebd98aSStefan Weil header.blocks_in_image = blocks; 6946eea90ebSStefan Weil if (image_type == VDI_TYPE_STATIC) { 6956eea90ebSStefan Weil header.blocks_allocated = blocks; 6966eea90ebSStefan Weil } 6979aebd98aSStefan Weil uuid_generate(header.uuid_image); 6989aebd98aSStefan Weil uuid_generate(header.uuid_last_snap); 6999aebd98aSStefan Weil /* There is no need to set header.uuid_link or header.uuid_parent here. */ 7009aebd98aSStefan Weil #if defined(CONFIG_VDI_DEBUG) 7019aebd98aSStefan Weil vdi_header_print(&header); 7029aebd98aSStefan Weil #endif 7039aebd98aSStefan Weil vdi_header_to_le(&header); 7049aebd98aSStefan Weil if (write(fd, &header, sizeof(header)) < 0) { 7059aebd98aSStefan Weil result = -errno; 7069aebd98aSStefan Weil } 7079aebd98aSStefan Weil 708b76b6e95SStefan Weil bmap = NULL; 709b76b6e95SStefan Weil if (bmap_size > 0) { 7107267c094SAnthony Liguori bmap = (uint32_t *)g_malloc0(bmap_size); 711b76b6e95SStefan Weil } 7129aebd98aSStefan Weil for (i = 0; i < blocks; i++) { 7139aebd98aSStefan Weil if (image_type == VDI_TYPE_STATIC) { 7149aebd98aSStefan Weil bmap[i] = i; 7159aebd98aSStefan Weil } else { 7169aebd98aSStefan Weil bmap[i] = VDI_UNALLOCATED; 7179aebd98aSStefan Weil } 7189aebd98aSStefan Weil } 7199aebd98aSStefan Weil if (write(fd, bmap, bmap_size) < 0) { 7209aebd98aSStefan Weil result = -errno; 7219aebd98aSStefan Weil } 7227267c094SAnthony Liguori g_free(bmap); 7239aebd98aSStefan Weil if (image_type == VDI_TYPE_STATIC) { 7249aebd98aSStefan Weil if (ftruncate(fd, sizeof(header) + bmap_size + blocks * block_size)) { 7259aebd98aSStefan Weil result = -errno; 7269aebd98aSStefan Weil } 7279aebd98aSStefan Weil } 7289aebd98aSStefan Weil 7299aebd98aSStefan Weil if (close(fd) < 0) { 7309aebd98aSStefan Weil result = -errno; 7319aebd98aSStefan Weil } 7329aebd98aSStefan Weil 7339aebd98aSStefan Weil return result; 7349aebd98aSStefan Weil } 7359aebd98aSStefan Weil 7369aebd98aSStefan Weil static void vdi_close(BlockDriverState *bs) 7379aebd98aSStefan Weil { 738fc9d106cSKevin Wolf BDRVVdiState *s = bs->opaque; 7396ac5f388SKevin Wolf 7406ac5f388SKevin Wolf g_free(s->bmap); 7416ac5f388SKevin Wolf 742fc9d106cSKevin Wolf migrate_del_blocker(s->migration_blocker); 743fc9d106cSKevin Wolf error_free(s->migration_blocker); 7449aebd98aSStefan Weil } 7459aebd98aSStefan Weil 7469aebd98aSStefan Weil static QEMUOptionParameter vdi_create_options[] = { 7479aebd98aSStefan Weil { 7489aebd98aSStefan Weil .name = BLOCK_OPT_SIZE, 7499aebd98aSStefan Weil .type = OPT_SIZE, 7509aebd98aSStefan Weil .help = "Virtual disk size" 7519aebd98aSStefan Weil }, 7529aebd98aSStefan Weil #if defined(CONFIG_VDI_BLOCK_SIZE) 7539aebd98aSStefan Weil { 7549aebd98aSStefan Weil .name = BLOCK_OPT_CLUSTER_SIZE, 7559aebd98aSStefan Weil .type = OPT_SIZE, 75699cce9faSKevin Wolf .help = "VDI cluster (block) size", 75799cce9faSKevin Wolf .value = { .n = DEFAULT_CLUSTER_SIZE }, 7589aebd98aSStefan Weil }, 7599aebd98aSStefan Weil #endif 7609aebd98aSStefan Weil #if defined(CONFIG_VDI_STATIC_IMAGE) 7619aebd98aSStefan Weil { 7629aebd98aSStefan Weil .name = BLOCK_OPT_STATIC, 7639aebd98aSStefan Weil .type = OPT_FLAG, 7649aebd98aSStefan Weil .help = "VDI static (pre-allocated) image" 7659aebd98aSStefan Weil }, 7669aebd98aSStefan Weil #endif 7679aebd98aSStefan Weil /* TODO: An additional option to set UUID values might be useful. */ 7689aebd98aSStefan Weil { NULL } 7699aebd98aSStefan Weil }; 7709aebd98aSStefan Weil 7719aebd98aSStefan Weil static BlockDriver bdrv_vdi = { 7729aebd98aSStefan Weil .format_name = "vdi", 7739aebd98aSStefan Weil .instance_size = sizeof(BDRVVdiState), 7749aebd98aSStefan Weil .bdrv_probe = vdi_probe, 7759aebd98aSStefan Weil .bdrv_open = vdi_open, 7769aebd98aSStefan Weil .bdrv_close = vdi_close, 7779aebd98aSStefan Weil .bdrv_create = vdi_create, 778e850b35aSStefan Hajnoczi .bdrv_co_is_allocated = vdi_co_is_allocated, 7799aebd98aSStefan Weil .bdrv_make_empty = vdi_make_empty, 7809aebd98aSStefan Weil 781*a7a43aa1SPaolo Bonzini .bdrv_read = vdi_co_read, 7829aebd98aSStefan Weil #if defined(CONFIG_VDI_WRITE) 783*a7a43aa1SPaolo Bonzini .bdrv_write = vdi_co_write, 7849aebd98aSStefan Weil #endif 7859aebd98aSStefan Weil 7869aebd98aSStefan Weil .bdrv_get_info = vdi_get_info, 7879aebd98aSStefan Weil 7889aebd98aSStefan Weil .create_options = vdi_create_options, 7899aebd98aSStefan Weil .bdrv_check = vdi_check, 7909aebd98aSStefan Weil }; 7919aebd98aSStefan Weil 7929aebd98aSStefan Weil static void bdrv_vdi_init(void) 7939aebd98aSStefan Weil { 7949aebd98aSStefan Weil logout("\n"); 7959aebd98aSStefan Weil bdrv_register(&bdrv_vdi); 7969aebd98aSStefan Weil } 7979aebd98aSStefan Weil 7989aebd98aSStefan Weil block_init(bdrv_vdi_init); 799