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 * 34dc6fb73dSDeepak Kathayat * Read and write of adjacent 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" 53737e150eSPaolo Bonzini #include "block/block_int.h" 541de7afc9SPaolo Bonzini #include "qemu/module.h" 55caf71f86SPaolo Bonzini #include "migration/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. */ 619c17d615SPaolo Bonzini #include "sysemu/sysemu.h" /* UUID_FMT */ 629aebd98aSStefan Weil typedef unsigned char uuid_t[16]; 639aebd98aSStefan Weil #endif 649aebd98aSStefan Weil 659aebd98aSStefan Weil /* Code configuration options. */ 669aebd98aSStefan Weil 679aebd98aSStefan Weil /* Enable debug messages. */ 689aebd98aSStefan Weil //~ #define CONFIG_VDI_DEBUG 699aebd98aSStefan Weil 709aebd98aSStefan Weil /* Support write operations on VDI images. */ 719aebd98aSStefan Weil #define CONFIG_VDI_WRITE 729aebd98aSStefan Weil 739aebd98aSStefan Weil /* Support non-standard block (cluster) size. This is untested. 749aebd98aSStefan Weil * Maybe it will be needed for very large images. 759aebd98aSStefan Weil */ 769aebd98aSStefan Weil //~ #define CONFIG_VDI_BLOCK_SIZE 779aebd98aSStefan Weil 789aebd98aSStefan Weil /* Support static (fixed, pre-allocated) images. */ 799aebd98aSStefan Weil #define CONFIG_VDI_STATIC_IMAGE 809aebd98aSStefan Weil 819aebd98aSStefan Weil /* Command line option for static images. */ 829aebd98aSStefan Weil #define BLOCK_OPT_STATIC "static" 839aebd98aSStefan Weil 849aebd98aSStefan Weil #define KiB 1024 859aebd98aSStefan Weil #define MiB (KiB * KiB) 869aebd98aSStefan Weil 879aebd98aSStefan Weil #define SECTOR_SIZE 512 8899cce9faSKevin Wolf #define DEFAULT_CLUSTER_SIZE (1 * MiB) 899aebd98aSStefan Weil 909aebd98aSStefan Weil #if defined(CONFIG_VDI_DEBUG) 919aebd98aSStefan Weil #define logout(fmt, ...) \ 929aebd98aSStefan Weil fprintf(stderr, "vdi\t%-24s" fmt, __func__, ##__VA_ARGS__) 939aebd98aSStefan Weil #else 949aebd98aSStefan Weil #define logout(fmt, ...) ((void)0) 959aebd98aSStefan Weil #endif 969aebd98aSStefan Weil 979aebd98aSStefan Weil /* Image signature. */ 989aebd98aSStefan Weil #define VDI_SIGNATURE 0xbeda107f 999aebd98aSStefan Weil 1009aebd98aSStefan Weil /* Image version. */ 1019aebd98aSStefan Weil #define VDI_VERSION_1_1 0x00010001 1029aebd98aSStefan Weil 1039aebd98aSStefan Weil /* Image type. */ 1049aebd98aSStefan Weil #define VDI_TYPE_DYNAMIC 1 1059aebd98aSStefan Weil #define VDI_TYPE_STATIC 2 1069aebd98aSStefan Weil 1079aebd98aSStefan Weil /* Innotek / SUN images use these strings in header.text: 1089aebd98aSStefan Weil * "<<< innotek VirtualBox Disk Image >>>\n" 1099aebd98aSStefan Weil * "<<< Sun xVM VirtualBox Disk Image >>>\n" 1109aebd98aSStefan Weil * "<<< Sun VirtualBox Disk Image >>>\n" 1119aebd98aSStefan Weil * The value does not matter, so QEMU created images use a different text. 1129aebd98aSStefan Weil */ 1139aebd98aSStefan Weil #define VDI_TEXT "<<< QEMU VM Virtual Disk Image >>>\n" 1149aebd98aSStefan Weil 115c794b4e0SEric Sunshine /* A never-allocated block; semantically arbitrary content. */ 116c794b4e0SEric Sunshine #define VDI_UNALLOCATED 0xffffffffU 117c794b4e0SEric Sunshine 118c794b4e0SEric Sunshine /* A discarded (no longer allocated) block; semantically zero-filled. */ 119c794b4e0SEric Sunshine #define VDI_DISCARDED 0xfffffffeU 120c794b4e0SEric Sunshine 121c794b4e0SEric Sunshine #define VDI_IS_ALLOCATED(X) ((X) < VDI_DISCARDED) 1229aebd98aSStefan Weil 12363fa06dcSJeff Cody /* max blocks in image is (0xffffffff / 4) */ 12463fa06dcSJeff Cody #define VDI_BLOCKS_IN_IMAGE_MAX 0x3fffffff 12563fa06dcSJeff Cody #define VDI_DISK_SIZE_MAX ((uint64_t)VDI_BLOCKS_IN_IMAGE_MAX * \ 12663fa06dcSJeff Cody (uint64_t)DEFAULT_CLUSTER_SIZE) 12763fa06dcSJeff Cody 128ee682d27SStefan Weil #if !defined(CONFIG_UUID) 1298ba2aae3SStefan Hajnoczi static inline void uuid_generate(uuid_t out) 1309aebd98aSStefan Weil { 1314f3669eaSStefan Weil memset(out, 0, sizeof(uuid_t)); 1329aebd98aSStefan Weil } 1339aebd98aSStefan Weil 1348ba2aae3SStefan Hajnoczi static inline int uuid_is_null(const uuid_t uu) 1359aebd98aSStefan Weil { 1369aebd98aSStefan Weil uuid_t null_uuid = { 0 }; 1374f3669eaSStefan Weil return memcmp(uu, null_uuid, sizeof(uuid_t)) == 0; 1389aebd98aSStefan Weil } 1399aebd98aSStefan Weil 1408ba2aae3SStefan Hajnoczi static inline void uuid_unparse(const uuid_t uu, char *out) 1419aebd98aSStefan Weil { 1429aebd98aSStefan Weil snprintf(out, 37, UUID_FMT, 1439aebd98aSStefan Weil uu[0], uu[1], uu[2], uu[3], uu[4], uu[5], uu[6], uu[7], 1449aebd98aSStefan Weil uu[8], uu[9], uu[10], uu[11], uu[12], uu[13], uu[14], uu[15]); 1459aebd98aSStefan Weil } 1469aebd98aSStefan Weil #endif 1479aebd98aSStefan Weil 1489aebd98aSStefan Weil typedef struct { 1499aebd98aSStefan Weil char text[0x40]; 1509aebd98aSStefan Weil uint32_t signature; 1519aebd98aSStefan Weil uint32_t version; 1529aebd98aSStefan Weil uint32_t header_size; 1539aebd98aSStefan Weil uint32_t image_type; 1549aebd98aSStefan Weil uint32_t image_flags; 1559aebd98aSStefan Weil char description[256]; 1569aebd98aSStefan Weil uint32_t offset_bmap; 1579aebd98aSStefan Weil uint32_t offset_data; 1589aebd98aSStefan Weil uint32_t cylinders; /* disk geometry, unused here */ 1599aebd98aSStefan Weil uint32_t heads; /* disk geometry, unused here */ 1609aebd98aSStefan Weil uint32_t sectors; /* disk geometry, unused here */ 1619aebd98aSStefan Weil uint32_t sector_size; 1629aebd98aSStefan Weil uint32_t unused1; 1639aebd98aSStefan Weil uint64_t disk_size; 1649aebd98aSStefan Weil uint32_t block_size; 1659aebd98aSStefan Weil uint32_t block_extra; /* unused here */ 1669aebd98aSStefan Weil uint32_t blocks_in_image; 1679aebd98aSStefan Weil uint32_t blocks_allocated; 1689aebd98aSStefan Weil uuid_t uuid_image; 1699aebd98aSStefan Weil uuid_t uuid_last_snap; 1709aebd98aSStefan Weil uuid_t uuid_link; 1719aebd98aSStefan Weil uuid_t uuid_parent; 1729aebd98aSStefan Weil uint64_t unused2[7]; 1738368febdSJeff Cody } QEMU_PACKED VdiHeader; 1749aebd98aSStefan Weil 1759aebd98aSStefan Weil typedef struct { 1769aebd98aSStefan Weil /* The block map entries are little endian (even in memory). */ 1779aebd98aSStefan Weil uint32_t *bmap; 1789aebd98aSStefan Weil /* Size of block (bytes). */ 1799aebd98aSStefan Weil uint32_t block_size; 1809aebd98aSStefan Weil /* Size of block (sectors). */ 1819aebd98aSStefan Weil uint32_t block_sectors; 1829aebd98aSStefan Weil /* First sector of block map. */ 1839aebd98aSStefan Weil uint32_t bmap_sector; 1844ff9786cSStefan Weil /* VDI header (converted to host endianness). */ 1859aebd98aSStefan Weil VdiHeader header; 186fc9d106cSKevin Wolf 187fc9d106cSKevin Wolf Error *migration_blocker; 1889aebd98aSStefan Weil } BDRVVdiState; 1899aebd98aSStefan Weil 1909aebd98aSStefan Weil /* Change UUID from little endian (IPRT = VirtualBox format) to big endian 1919aebd98aSStefan Weil * format (network byte order, standard, see RFC 4122) and vice versa. 1929aebd98aSStefan Weil */ 1939aebd98aSStefan Weil static void uuid_convert(uuid_t uuid) 1949aebd98aSStefan Weil { 1959aebd98aSStefan Weil bswap32s((uint32_t *)&uuid[0]); 1969aebd98aSStefan Weil bswap16s((uint16_t *)&uuid[4]); 1979aebd98aSStefan Weil bswap16s((uint16_t *)&uuid[6]); 1989aebd98aSStefan Weil } 1999aebd98aSStefan Weil 2009aebd98aSStefan Weil static void vdi_header_to_cpu(VdiHeader *header) 2019aebd98aSStefan Weil { 2029aebd98aSStefan Weil le32_to_cpus(&header->signature); 2039aebd98aSStefan Weil le32_to_cpus(&header->version); 2049aebd98aSStefan Weil le32_to_cpus(&header->header_size); 2059aebd98aSStefan Weil le32_to_cpus(&header->image_type); 2069aebd98aSStefan Weil le32_to_cpus(&header->image_flags); 2079aebd98aSStefan Weil le32_to_cpus(&header->offset_bmap); 2089aebd98aSStefan Weil le32_to_cpus(&header->offset_data); 2099aebd98aSStefan Weil le32_to_cpus(&header->cylinders); 2109aebd98aSStefan Weil le32_to_cpus(&header->heads); 2119aebd98aSStefan Weil le32_to_cpus(&header->sectors); 2129aebd98aSStefan Weil le32_to_cpus(&header->sector_size); 2139aebd98aSStefan Weil le64_to_cpus(&header->disk_size); 2149aebd98aSStefan Weil le32_to_cpus(&header->block_size); 2159aebd98aSStefan Weil le32_to_cpus(&header->block_extra); 2169aebd98aSStefan Weil le32_to_cpus(&header->blocks_in_image); 2179aebd98aSStefan Weil le32_to_cpus(&header->blocks_allocated); 2189aebd98aSStefan Weil uuid_convert(header->uuid_image); 2199aebd98aSStefan Weil uuid_convert(header->uuid_last_snap); 2209aebd98aSStefan Weil uuid_convert(header->uuid_link); 2219aebd98aSStefan Weil uuid_convert(header->uuid_parent); 2229aebd98aSStefan Weil } 2239aebd98aSStefan Weil 2249aebd98aSStefan Weil static void vdi_header_to_le(VdiHeader *header) 2259aebd98aSStefan Weil { 2269aebd98aSStefan Weil cpu_to_le32s(&header->signature); 2279aebd98aSStefan Weil cpu_to_le32s(&header->version); 2289aebd98aSStefan Weil cpu_to_le32s(&header->header_size); 2299aebd98aSStefan Weil cpu_to_le32s(&header->image_type); 2309aebd98aSStefan Weil cpu_to_le32s(&header->image_flags); 2319aebd98aSStefan Weil cpu_to_le32s(&header->offset_bmap); 2329aebd98aSStefan Weil cpu_to_le32s(&header->offset_data); 2339aebd98aSStefan Weil cpu_to_le32s(&header->cylinders); 2349aebd98aSStefan Weil cpu_to_le32s(&header->heads); 2359aebd98aSStefan Weil cpu_to_le32s(&header->sectors); 2369aebd98aSStefan Weil cpu_to_le32s(&header->sector_size); 2379aebd98aSStefan Weil cpu_to_le64s(&header->disk_size); 2389aebd98aSStefan Weil cpu_to_le32s(&header->block_size); 2399aebd98aSStefan Weil cpu_to_le32s(&header->block_extra); 2409aebd98aSStefan Weil cpu_to_le32s(&header->blocks_in_image); 2419aebd98aSStefan Weil cpu_to_le32s(&header->blocks_allocated); 2429aebd98aSStefan Weil uuid_convert(header->uuid_image); 2439aebd98aSStefan Weil uuid_convert(header->uuid_last_snap); 2449aebd98aSStefan Weil uuid_convert(header->uuid_link); 2459aebd98aSStefan Weil uuid_convert(header->uuid_parent); 2469aebd98aSStefan Weil } 2479aebd98aSStefan Weil 2489aebd98aSStefan Weil #if defined(CONFIG_VDI_DEBUG) 2499aebd98aSStefan Weil static void vdi_header_print(VdiHeader *header) 2509aebd98aSStefan Weil { 2519aebd98aSStefan Weil char uuid[37]; 2529aebd98aSStefan Weil logout("text %s", header->text); 2539f0470bbSStefan Weil logout("signature 0x%08x\n", header->signature); 2549aebd98aSStefan Weil logout("header size 0x%04x\n", header->header_size); 2559aebd98aSStefan Weil logout("image type 0x%04x\n", header->image_type); 2569aebd98aSStefan Weil logout("image flags 0x%04x\n", header->image_flags); 2579aebd98aSStefan Weil logout("description %s\n", header->description); 2589aebd98aSStefan Weil logout("offset bmap 0x%04x\n", header->offset_bmap); 2599aebd98aSStefan Weil logout("offset data 0x%04x\n", header->offset_data); 2609aebd98aSStefan Weil logout("cylinders 0x%04x\n", header->cylinders); 2619aebd98aSStefan Weil logout("heads 0x%04x\n", header->heads); 2629aebd98aSStefan Weil logout("sectors 0x%04x\n", header->sectors); 2639aebd98aSStefan Weil logout("sector size 0x%04x\n", header->sector_size); 2649aebd98aSStefan Weil logout("image size 0x%" PRIx64 " B (%" PRIu64 " MiB)\n", 2659aebd98aSStefan Weil header->disk_size, header->disk_size / MiB); 2669aebd98aSStefan Weil logout("block size 0x%04x\n", header->block_size); 2679aebd98aSStefan Weil logout("block extra 0x%04x\n", header->block_extra); 2689aebd98aSStefan Weil logout("blocks tot. 0x%04x\n", header->blocks_in_image); 2699aebd98aSStefan Weil logout("blocks all. 0x%04x\n", header->blocks_allocated); 2709aebd98aSStefan Weil uuid_unparse(header->uuid_image, uuid); 2719aebd98aSStefan Weil logout("uuid image %s\n", uuid); 2729aebd98aSStefan Weil uuid_unparse(header->uuid_last_snap, uuid); 2739aebd98aSStefan Weil logout("uuid snap %s\n", uuid); 2749aebd98aSStefan Weil uuid_unparse(header->uuid_link, uuid); 2759aebd98aSStefan Weil logout("uuid link %s\n", uuid); 2769aebd98aSStefan Weil uuid_unparse(header->uuid_parent, uuid); 2779aebd98aSStefan Weil logout("uuid parent %s\n", uuid); 2789aebd98aSStefan Weil } 2799aebd98aSStefan Weil #endif 2809aebd98aSStefan Weil 2814534ff54SKevin Wolf static int vdi_check(BlockDriverState *bs, BdrvCheckResult *res, 2824534ff54SKevin Wolf BdrvCheckMode fix) 2839aebd98aSStefan Weil { 2849aebd98aSStefan Weil /* TODO: additional checks possible. */ 2859aebd98aSStefan Weil BDRVVdiState *s = (BDRVVdiState *)bs->opaque; 2869aebd98aSStefan Weil uint32_t blocks_allocated = 0; 2879aebd98aSStefan Weil uint32_t block; 2889aebd98aSStefan Weil uint32_t *bmap; 2899aebd98aSStefan Weil logout("\n"); 2909aebd98aSStefan Weil 2914534ff54SKevin Wolf if (fix) { 2924534ff54SKevin Wolf return -ENOTSUP; 2934534ff54SKevin Wolf } 2944534ff54SKevin Wolf 2955839e53bSMarkus Armbruster bmap = g_try_new(uint32_t, s->header.blocks_in_image); 29617cce735SKevin Wolf if (s->header.blocks_in_image && bmap == NULL) { 29717cce735SKevin Wolf res->check_errors++; 29817cce735SKevin Wolf return -ENOMEM; 29917cce735SKevin Wolf } 30017cce735SKevin Wolf 3019aebd98aSStefan Weil memset(bmap, 0xff, s->header.blocks_in_image * sizeof(uint32_t)); 3029aebd98aSStefan Weil 3039aebd98aSStefan Weil /* Check block map and value of blocks_allocated. */ 3049aebd98aSStefan Weil for (block = 0; block < s->header.blocks_in_image; block++) { 3059aebd98aSStefan Weil uint32_t bmap_entry = le32_to_cpu(s->bmap[block]); 306c794b4e0SEric Sunshine if (VDI_IS_ALLOCATED(bmap_entry)) { 3079aebd98aSStefan Weil if (bmap_entry < s->header.blocks_in_image) { 3089aebd98aSStefan Weil blocks_allocated++; 309c794b4e0SEric Sunshine if (!VDI_IS_ALLOCATED(bmap[bmap_entry])) { 3109aebd98aSStefan Weil bmap[bmap_entry] = bmap_entry; 3119aebd98aSStefan Weil } else { 3129aebd98aSStefan Weil fprintf(stderr, "ERROR: block index %" PRIu32 3139aebd98aSStefan Weil " also used by %" PRIu32 "\n", bmap[bmap_entry], bmap_entry); 3149ac228e0SKevin Wolf res->corruptions++; 3159aebd98aSStefan Weil } 3169aebd98aSStefan Weil } else { 3179aebd98aSStefan Weil fprintf(stderr, "ERROR: block index %" PRIu32 3189aebd98aSStefan Weil " too large, is %" PRIu32 "\n", block, bmap_entry); 3199ac228e0SKevin Wolf res->corruptions++; 3209aebd98aSStefan Weil } 3219aebd98aSStefan Weil } 3229aebd98aSStefan Weil } 3239aebd98aSStefan Weil if (blocks_allocated != s->header.blocks_allocated) { 3249aebd98aSStefan Weil fprintf(stderr, "ERROR: allocated blocks mismatch, is %" PRIu32 3259aebd98aSStefan Weil ", should be %" PRIu32 "\n", 3269aebd98aSStefan Weil blocks_allocated, s->header.blocks_allocated); 3279ac228e0SKevin Wolf res->corruptions++; 3289aebd98aSStefan Weil } 3299aebd98aSStefan Weil 3307267c094SAnthony Liguori g_free(bmap); 3319aebd98aSStefan Weil 3329ac228e0SKevin Wolf return 0; 3339aebd98aSStefan Weil } 3349aebd98aSStefan Weil 3359aebd98aSStefan Weil static int vdi_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) 3369aebd98aSStefan Weil { 3379aebd98aSStefan Weil /* TODO: vdi_get_info would be needed for machine snapshots. 3389aebd98aSStefan Weil vm_state_offset is still missing. */ 3399aebd98aSStefan Weil BDRVVdiState *s = (BDRVVdiState *)bs->opaque; 3409aebd98aSStefan Weil logout("\n"); 3419aebd98aSStefan Weil bdi->cluster_size = s->block_size; 3429aebd98aSStefan Weil bdi->vm_state_offset = 0; 34395de6d70SPaolo Bonzini bdi->unallocated_blocks_are_zero = true; 3449aebd98aSStefan Weil return 0; 3459aebd98aSStefan Weil } 3469aebd98aSStefan Weil 3479aebd98aSStefan Weil static int vdi_make_empty(BlockDriverState *bs) 3489aebd98aSStefan Weil { 3499aebd98aSStefan Weil /* TODO: missing code. */ 3509aebd98aSStefan Weil logout("\n"); 3519aebd98aSStefan Weil /* The return value for missing code must be 0, see block.c. */ 3529aebd98aSStefan Weil return 0; 3539aebd98aSStefan Weil } 3549aebd98aSStefan Weil 3559aebd98aSStefan Weil static int vdi_probe(const uint8_t *buf, int buf_size, const char *filename) 3569aebd98aSStefan Weil { 3579aebd98aSStefan Weil const VdiHeader *header = (const VdiHeader *)buf; 358dddc7750SJeff Cody int ret = 0; 3599aebd98aSStefan Weil 3609aebd98aSStefan Weil logout("\n"); 3619aebd98aSStefan Weil 3629aebd98aSStefan Weil if (buf_size < sizeof(*header)) { 3639aebd98aSStefan Weil /* Header too small, no VDI. */ 3649aebd98aSStefan Weil } else if (le32_to_cpu(header->signature) == VDI_SIGNATURE) { 365dddc7750SJeff Cody ret = 100; 3669aebd98aSStefan Weil } 3679aebd98aSStefan Weil 368dddc7750SJeff Cody if (ret == 0) { 3699aebd98aSStefan Weil logout("no vdi image\n"); 3709aebd98aSStefan Weil } else { 3719aebd98aSStefan Weil logout("%s", header->text); 3729aebd98aSStefan Weil } 3739aebd98aSStefan Weil 374dddc7750SJeff Cody return ret; 3759aebd98aSStefan Weil } 3769aebd98aSStefan Weil 377015a1036SMax Reitz static int vdi_open(BlockDriverState *bs, QDict *options, int flags, 378015a1036SMax Reitz Error **errp) 3799aebd98aSStefan Weil { 3809aebd98aSStefan Weil BDRVVdiState *s = bs->opaque; 3819aebd98aSStefan Weil VdiHeader header; 3829aebd98aSStefan Weil size_t bmap_size; 3838937f822SStefan Weil int ret; 3849aebd98aSStefan Weil 3859aebd98aSStefan Weil logout("\n"); 3869aebd98aSStefan Weil 3878937f822SStefan Weil ret = bdrv_read(bs->file, 0, (uint8_t *)&header, 1); 3888937f822SStefan Weil if (ret < 0) { 3899aebd98aSStefan Weil goto fail; 3909aebd98aSStefan Weil } 3919aebd98aSStefan Weil 3929aebd98aSStefan Weil vdi_header_to_cpu(&header); 3939aebd98aSStefan Weil #if defined(CONFIG_VDI_DEBUG) 3949aebd98aSStefan Weil vdi_header_print(&header); 3959aebd98aSStefan Weil #endif 3969aebd98aSStefan Weil 39763fa06dcSJeff Cody if (header.disk_size > VDI_DISK_SIZE_MAX) { 39863fa06dcSJeff Cody error_setg(errp, "Unsupported VDI image size (size is 0x%" PRIx64 39963fa06dcSJeff Cody ", max supported is 0x%" PRIx64 ")", 40063fa06dcSJeff Cody header.disk_size, VDI_DISK_SIZE_MAX); 40163fa06dcSJeff Cody ret = -ENOTSUP; 40263fa06dcSJeff Cody goto fail; 40363fa06dcSJeff Cody } 40463fa06dcSJeff Cody 405f21dc3a4SStefan Weil if (header.disk_size % SECTOR_SIZE != 0) { 406f21dc3a4SStefan Weil /* 'VBoxManage convertfromraw' can create images with odd disk sizes. 407f21dc3a4SStefan Weil We accept them but round the disk size to the next multiple of 408f21dc3a4SStefan Weil SECTOR_SIZE. */ 409f21dc3a4SStefan Weil logout("odd disk size %" PRIu64 " B, round up\n", header.disk_size); 410*e9082e47SMax Reitz header.disk_size = ROUND_UP(header.disk_size, SECTOR_SIZE); 411f21dc3a4SStefan Weil } 412f21dc3a4SStefan Weil 4130e87ba2cSStefan Weil if (header.signature != VDI_SIGNATURE) { 414521b2b5dSMax Reitz error_setg(errp, "Image not in VDI format (bad signature %08" PRIx32 415521b2b5dSMax Reitz ")", header.signature); 41676abe407SPaolo Bonzini ret = -EINVAL; 4170e87ba2cSStefan Weil goto fail; 4180e87ba2cSStefan Weil } else if (header.version != VDI_VERSION_1_1) { 419521b2b5dSMax Reitz error_setg(errp, "unsupported VDI image (version %" PRIu32 ".%" PRIu32 420521b2b5dSMax Reitz ")", header.version >> 16, header.version & 0xffff); 4218937f822SStefan Weil ret = -ENOTSUP; 4229aebd98aSStefan Weil goto fail; 4239aebd98aSStefan Weil } else if (header.offset_bmap % SECTOR_SIZE != 0) { 4249aebd98aSStefan Weil /* We only support block maps which start on a sector boundary. */ 4255b7aa9b5SPaolo Bonzini error_setg(errp, "unsupported VDI image (unaligned block map offset " 426521b2b5dSMax Reitz "0x%" PRIx32 ")", header.offset_bmap); 4278937f822SStefan Weil ret = -ENOTSUP; 4289aebd98aSStefan Weil goto fail; 4299aebd98aSStefan Weil } else if (header.offset_data % SECTOR_SIZE != 0) { 4309aebd98aSStefan Weil /* We only support data blocks which start on a sector boundary. */ 431521b2b5dSMax Reitz error_setg(errp, "unsupported VDI image (unaligned data offset 0x%" 432521b2b5dSMax Reitz PRIx32 ")", header.offset_data); 4338937f822SStefan Weil ret = -ENOTSUP; 4349aebd98aSStefan Weil goto fail; 4359aebd98aSStefan Weil } else if (header.sector_size != SECTOR_SIZE) { 436521b2b5dSMax Reitz error_setg(errp, "unsupported VDI image (sector size %" PRIu32 437521b2b5dSMax Reitz " is not %u)", header.sector_size, SECTOR_SIZE); 4388937f822SStefan Weil ret = -ENOTSUP; 4399aebd98aSStefan Weil goto fail; 44063fa06dcSJeff Cody } else if (header.block_size != DEFAULT_CLUSTER_SIZE) { 441521b2b5dSMax Reitz error_setg(errp, "unsupported VDI image (block size %" PRIu32 442521b2b5dSMax Reitz " is not %u)", header.block_size, DEFAULT_CLUSTER_SIZE); 4438937f822SStefan Weil ret = -ENOTSUP; 4449aebd98aSStefan Weil goto fail; 445f21dc3a4SStefan Weil } else if (header.disk_size > 446f21dc3a4SStefan Weil (uint64_t)header.blocks_in_image * header.block_size) { 4475b7aa9b5SPaolo Bonzini error_setg(errp, "unsupported VDI image (disk size %" PRIu64 ", " 4485b7aa9b5SPaolo Bonzini "image bitmap has room for %" PRIu64 ")", 4495b7aa9b5SPaolo Bonzini header.disk_size, 4505b7aa9b5SPaolo Bonzini (uint64_t)header.blocks_in_image * header.block_size); 4518937f822SStefan Weil ret = -ENOTSUP; 4529aebd98aSStefan Weil goto fail; 4539aebd98aSStefan Weil } else if (!uuid_is_null(header.uuid_link)) { 4545b7aa9b5SPaolo Bonzini error_setg(errp, "unsupported VDI image (non-NULL link UUID)"); 4558937f822SStefan Weil ret = -ENOTSUP; 4569aebd98aSStefan Weil goto fail; 4579aebd98aSStefan Weil } else if (!uuid_is_null(header.uuid_parent)) { 4585b7aa9b5SPaolo Bonzini error_setg(errp, "unsupported VDI image (non-NULL parent UUID)"); 4598937f822SStefan Weil ret = -ENOTSUP; 4609aebd98aSStefan Weil goto fail; 46163fa06dcSJeff Cody } else if (header.blocks_in_image > VDI_BLOCKS_IN_IMAGE_MAX) { 46263fa06dcSJeff Cody error_setg(errp, "unsupported VDI image " 46363fa06dcSJeff Cody "(too many blocks %u, max is %u)", 46463fa06dcSJeff Cody header.blocks_in_image, VDI_BLOCKS_IN_IMAGE_MAX); 46563fa06dcSJeff Cody ret = -ENOTSUP; 46663fa06dcSJeff Cody goto fail; 4679aebd98aSStefan Weil } 4689aebd98aSStefan Weil 4699aebd98aSStefan Weil bs->total_sectors = header.disk_size / SECTOR_SIZE; 4709aebd98aSStefan Weil 4719aebd98aSStefan Weil s->block_size = header.block_size; 4729aebd98aSStefan Weil s->block_sectors = header.block_size / SECTOR_SIZE; 4739aebd98aSStefan Weil s->bmap_sector = header.offset_bmap / SECTOR_SIZE; 4749aebd98aSStefan Weil s->header = header; 4759aebd98aSStefan Weil 4769aebd98aSStefan Weil bmap_size = header.blocks_in_image * sizeof(uint32_t); 477*e9082e47SMax Reitz bmap_size = DIV_ROUND_UP(bmap_size, SECTOR_SIZE); 47817cce735SKevin Wolf s->bmap = qemu_try_blockalign(bs->file, bmap_size * SECTOR_SIZE); 47917cce735SKevin Wolf if (s->bmap == NULL) { 48017cce735SKevin Wolf ret = -ENOMEM; 48117cce735SKevin Wolf goto fail; 48217cce735SKevin Wolf } 48317cce735SKevin Wolf 4848937f822SStefan Weil ret = bdrv_read(bs->file, s->bmap_sector, (uint8_t *)s->bmap, bmap_size); 4858937f822SStefan Weil if (ret < 0) { 4869aebd98aSStefan Weil goto fail_free_bmap; 4879aebd98aSStefan Weil } 4889aebd98aSStefan Weil 489fc9d106cSKevin Wolf /* Disable migration when vdi images are used */ 490fc9d106cSKevin Wolf error_set(&s->migration_blocker, 491fc9d106cSKevin Wolf QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED, 492bfb197e0SMarkus Armbruster "vdi", bdrv_get_device_name(bs), "live migration"); 493fc9d106cSKevin Wolf migrate_add_blocker(s->migration_blocker); 494fc9d106cSKevin Wolf 4959aebd98aSStefan Weil return 0; 4969aebd98aSStefan Weil 4979aebd98aSStefan Weil fail_free_bmap: 49817cce735SKevin Wolf qemu_vfree(s->bmap); 4999aebd98aSStefan Weil 5009aebd98aSStefan Weil fail: 5018937f822SStefan Weil return ret; 5029aebd98aSStefan Weil } 5039aebd98aSStefan Weil 504ecfe2bbaSJeff Cody static int vdi_reopen_prepare(BDRVReopenState *state, 505ecfe2bbaSJeff Cody BlockReopenQueue *queue, Error **errp) 506ecfe2bbaSJeff Cody { 507ecfe2bbaSJeff Cody return 0; 508ecfe2bbaSJeff Cody } 509ecfe2bbaSJeff Cody 510b6b8a333SPaolo Bonzini static int64_t coroutine_fn vdi_co_get_block_status(BlockDriverState *bs, 511e850b35aSStefan Hajnoczi int64_t sector_num, int nb_sectors, int *pnum) 5129aebd98aSStefan Weil { 5139aebd98aSStefan Weil /* TODO: Check for too large sector_num (in bdrv_is_allocated or here). */ 5149aebd98aSStefan Weil BDRVVdiState *s = (BDRVVdiState *)bs->opaque; 5159aebd98aSStefan Weil size_t bmap_index = sector_num / s->block_sectors; 5169aebd98aSStefan Weil size_t sector_in_block = sector_num % s->block_sectors; 5179aebd98aSStefan Weil int n_sectors = s->block_sectors - sector_in_block; 5189aebd98aSStefan Weil uint32_t bmap_entry = le32_to_cpu(s->bmap[bmap_index]); 5194bc74be9SPaolo Bonzini uint64_t offset; 5204bc74be9SPaolo Bonzini int result; 5214bc74be9SPaolo Bonzini 5229aebd98aSStefan Weil logout("%p, %" PRId64 ", %d, %p\n", bs, sector_num, nb_sectors, pnum); 5239aebd98aSStefan Weil if (n_sectors > nb_sectors) { 5249aebd98aSStefan Weil n_sectors = nb_sectors; 5259aebd98aSStefan Weil } 5269aebd98aSStefan Weil *pnum = n_sectors; 5274bc74be9SPaolo Bonzini result = VDI_IS_ALLOCATED(bmap_entry); 5284bc74be9SPaolo Bonzini if (!result) { 5294bc74be9SPaolo Bonzini return 0; 5304bc74be9SPaolo Bonzini } 5314bc74be9SPaolo Bonzini 5324bc74be9SPaolo Bonzini offset = s->header.offset_data + 5334bc74be9SPaolo Bonzini (uint64_t)bmap_entry * s->block_size + 5344bc74be9SPaolo Bonzini sector_in_block * SECTOR_SIZE; 5354bc74be9SPaolo Bonzini return BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID | offset; 5369aebd98aSStefan Weil } 5379aebd98aSStefan Weil 538a7a43aa1SPaolo Bonzini static int vdi_co_read(BlockDriverState *bs, 539a7a43aa1SPaolo Bonzini int64_t sector_num, uint8_t *buf, int nb_sectors) 5409aebd98aSStefan Weil { 5419aebd98aSStefan Weil BDRVVdiState *s = bs->opaque; 5429aebd98aSStefan Weil uint32_t bmap_entry; 5439aebd98aSStefan Weil uint32_t block_index; 5449aebd98aSStefan Weil uint32_t sector_in_block; 5459aebd98aSStefan Weil uint32_t n_sectors; 546eb9566d1SPaolo Bonzini int ret = 0; 5474de659e8SPaolo Bonzini 5484de659e8SPaolo Bonzini logout("\n"); 5499aebd98aSStefan Weil 550eb9566d1SPaolo Bonzini while (ret >= 0 && nb_sectors > 0) { 551bfc45fc1SPaolo Bonzini block_index = sector_num / s->block_sectors; 552bfc45fc1SPaolo Bonzini sector_in_block = sector_num % s->block_sectors; 5539aebd98aSStefan Weil n_sectors = s->block_sectors - sector_in_block; 554bfc45fc1SPaolo Bonzini if (n_sectors > nb_sectors) { 555bfc45fc1SPaolo Bonzini n_sectors = nb_sectors; 5569aebd98aSStefan Weil } 5579aebd98aSStefan Weil 5589aebd98aSStefan Weil logout("will read %u sectors starting at sector %" PRIu64 "\n", 559bfc45fc1SPaolo Bonzini n_sectors, sector_num); 5609aebd98aSStefan Weil 5619aebd98aSStefan Weil /* prepare next AIO request */ 5629aebd98aSStefan Weil bmap_entry = le32_to_cpu(s->bmap[block_index]); 563c794b4e0SEric Sunshine if (!VDI_IS_ALLOCATED(bmap_entry)) { 5649aebd98aSStefan Weil /* Block not allocated, return zeros, no need to wait. */ 565a7a43aa1SPaolo Bonzini memset(buf, 0, n_sectors * SECTOR_SIZE); 5663d46a75aSPaolo Bonzini ret = 0; 5679aebd98aSStefan Weil } else { 5689aebd98aSStefan Weil uint64_t offset = s->header.offset_data / SECTOR_SIZE + 5699aebd98aSStefan Weil (uint64_t)bmap_entry * s->block_sectors + 5709aebd98aSStefan Weil sector_in_block; 5714eea78e6SPaolo Bonzini ret = bdrv_read(bs->file, offset, buf, n_sectors); 5729aebd98aSStefan Weil } 573bfc45fc1SPaolo Bonzini logout("%u sectors read\n", n_sectors); 5740c7bfc32SPaolo Bonzini 575bfc45fc1SPaolo Bonzini nb_sectors -= n_sectors; 576bfc45fc1SPaolo Bonzini sector_num += n_sectors; 577a7a43aa1SPaolo Bonzini buf += n_sectors * SECTOR_SIZE; 5783d46a75aSPaolo Bonzini } 5793d46a75aSPaolo Bonzini 5803d46a75aSPaolo Bonzini return ret; 5819aebd98aSStefan Weil } 5829aebd98aSStefan Weil 583a7a43aa1SPaolo Bonzini static int vdi_co_write(BlockDriverState *bs, 584a7a43aa1SPaolo Bonzini int64_t sector_num, const uint8_t *buf, int nb_sectors) 5859aebd98aSStefan Weil { 5869aebd98aSStefan Weil BDRVVdiState *s = bs->opaque; 5879aebd98aSStefan Weil uint32_t bmap_entry; 5889aebd98aSStefan Weil uint32_t block_index; 5899aebd98aSStefan Weil uint32_t sector_in_block; 5909aebd98aSStefan Weil uint32_t n_sectors; 591bfc45fc1SPaolo Bonzini uint32_t bmap_first = VDI_UNALLOCATED; 592bfc45fc1SPaolo Bonzini uint32_t bmap_last = VDI_UNALLOCATED; 593bfc45fc1SPaolo Bonzini uint8_t *block = NULL; 594eb9566d1SPaolo Bonzini int ret = 0; 5954de659e8SPaolo Bonzini 5964de659e8SPaolo Bonzini logout("\n"); 5979aebd98aSStefan Weil 598eb9566d1SPaolo Bonzini while (ret >= 0 && nb_sectors > 0) { 599bfc45fc1SPaolo Bonzini block_index = sector_num / s->block_sectors; 600bfc45fc1SPaolo Bonzini sector_in_block = sector_num % s->block_sectors; 6019aebd98aSStefan Weil n_sectors = s->block_sectors - sector_in_block; 602bfc45fc1SPaolo Bonzini if (n_sectors > nb_sectors) { 603bfc45fc1SPaolo Bonzini n_sectors = nb_sectors; 6049aebd98aSStefan Weil } 6059aebd98aSStefan Weil 6069aebd98aSStefan Weil logout("will write %u sectors starting at sector %" PRIu64 "\n", 607bfc45fc1SPaolo Bonzini n_sectors, sector_num); 6089aebd98aSStefan Weil 6099aebd98aSStefan Weil /* prepare next AIO request */ 6109aebd98aSStefan Weil bmap_entry = le32_to_cpu(s->bmap[block_index]); 611c794b4e0SEric Sunshine if (!VDI_IS_ALLOCATED(bmap_entry)) { 6129aebd98aSStefan Weil /* Allocate new block and write to it. */ 6139aebd98aSStefan Weil uint64_t offset; 6149aebd98aSStefan Weil bmap_entry = s->header.blocks_allocated; 6159aebd98aSStefan Weil s->bmap[block_index] = cpu_to_le32(bmap_entry); 6169aebd98aSStefan Weil s->header.blocks_allocated++; 6179aebd98aSStefan Weil offset = s->header.offset_data / SECTOR_SIZE + 6189aebd98aSStefan Weil (uint64_t)bmap_entry * s->block_sectors; 6199aebd98aSStefan Weil if (block == NULL) { 620641543b7SStefan Weil block = g_malloc(s->block_size); 621bfc45fc1SPaolo Bonzini bmap_first = block_index; 6229aebd98aSStefan Weil } 623bfc45fc1SPaolo Bonzini bmap_last = block_index; 624641543b7SStefan Weil /* Copy data to be written to new block and zero unused parts. */ 625641543b7SStefan Weil memset(block, 0, sector_in_block * SECTOR_SIZE); 6269aebd98aSStefan Weil memcpy(block + sector_in_block * SECTOR_SIZE, 627a7a43aa1SPaolo Bonzini buf, n_sectors * SECTOR_SIZE); 628641543b7SStefan Weil memset(block + (sector_in_block + n_sectors) * SECTOR_SIZE, 0, 629641543b7SStefan Weil (s->block_sectors - n_sectors - sector_in_block) * SECTOR_SIZE); 6304eea78e6SPaolo Bonzini ret = bdrv_write(bs->file, offset, block, s->block_sectors); 6319aebd98aSStefan Weil } else { 6329aebd98aSStefan Weil uint64_t offset = s->header.offset_data / SECTOR_SIZE + 6339aebd98aSStefan Weil (uint64_t)bmap_entry * s->block_sectors + 6349aebd98aSStefan Weil sector_in_block; 6354eea78e6SPaolo Bonzini ret = bdrv_write(bs->file, offset, buf, n_sectors); 6369aebd98aSStefan Weil } 6370c7bfc32SPaolo Bonzini 638bfc45fc1SPaolo Bonzini nb_sectors -= n_sectors; 639bfc45fc1SPaolo Bonzini sector_num += n_sectors; 640a7a43aa1SPaolo Bonzini buf += n_sectors * SECTOR_SIZE; 6410c7bfc32SPaolo Bonzini 642bfc45fc1SPaolo Bonzini logout("%u sectors written\n", n_sectors); 6433d46a75aSPaolo Bonzini } 6449aebd98aSStefan Weil 6450c7bfc32SPaolo Bonzini logout("finished data write\n"); 6464eea78e6SPaolo Bonzini if (ret < 0) { 6474eea78e6SPaolo Bonzini return ret; 6484eea78e6SPaolo Bonzini } 6494eea78e6SPaolo Bonzini 650bfc45fc1SPaolo Bonzini if (block) { 6514eea78e6SPaolo Bonzini /* One or more new blocks were allocated. */ 652bfc45fc1SPaolo Bonzini VdiHeader *header = (VdiHeader *) block; 6534eea78e6SPaolo Bonzini uint8_t *base; 6544eea78e6SPaolo Bonzini uint64_t offset; 6554eea78e6SPaolo Bonzini 6560c7bfc32SPaolo Bonzini logout("now writing modified header\n"); 657bfc45fc1SPaolo Bonzini assert(VDI_IS_ALLOCATED(bmap_first)); 6580c7bfc32SPaolo Bonzini *header = s->header; 6590c7bfc32SPaolo Bonzini vdi_header_to_le(header); 6604eea78e6SPaolo Bonzini ret = bdrv_write(bs->file, 0, block, 1); 661bfc45fc1SPaolo Bonzini g_free(block); 662bfc45fc1SPaolo Bonzini block = NULL; 6634eea78e6SPaolo Bonzini 6644eea78e6SPaolo Bonzini if (ret < 0) { 6654eea78e6SPaolo Bonzini return ret; 6664eea78e6SPaolo Bonzini } 6674eea78e6SPaolo Bonzini 6680c7bfc32SPaolo Bonzini logout("now writing modified block map entry %u...%u\n", 6690c7bfc32SPaolo Bonzini bmap_first, bmap_last); 6700c7bfc32SPaolo Bonzini /* Write modified sectors from block map. */ 6710c7bfc32SPaolo Bonzini bmap_first /= (SECTOR_SIZE / sizeof(uint32_t)); 6720c7bfc32SPaolo Bonzini bmap_last /= (SECTOR_SIZE / sizeof(uint32_t)); 6730c7bfc32SPaolo Bonzini n_sectors = bmap_last - bmap_first + 1; 6740c7bfc32SPaolo Bonzini offset = s->bmap_sector + bmap_first; 6754eea78e6SPaolo Bonzini base = ((uint8_t *)&s->bmap[0]) + bmap_first * SECTOR_SIZE; 6760c7bfc32SPaolo Bonzini logout("will write %u block map sectors starting from entry %u\n", 6770c7bfc32SPaolo Bonzini n_sectors, bmap_first); 6784eea78e6SPaolo Bonzini ret = bdrv_write(bs->file, offset, base, n_sectors); 6790c7bfc32SPaolo Bonzini } 6800c7bfc32SPaolo Bonzini 6813d46a75aSPaolo Bonzini return ret; 6829aebd98aSStefan Weil } 6839aebd98aSStefan Weil 684004b7f25SChunyan Liu static int vdi_create(const char *filename, QemuOpts *opts, Error **errp) 6859aebd98aSStefan Weil { 686dddc7750SJeff Cody int ret = 0; 6879aebd98aSStefan Weil uint64_t bytes = 0; 6889aebd98aSStefan Weil uint32_t blocks; 68999cce9faSKevin Wolf size_t block_size = DEFAULT_CLUSTER_SIZE; 6909aebd98aSStefan Weil uint32_t image_type = VDI_TYPE_DYNAMIC; 6919aebd98aSStefan Weil VdiHeader header; 6929aebd98aSStefan Weil size_t i; 6939aebd98aSStefan Weil size_t bmap_size; 69470747862SJeff Cody int64_t offset = 0; 69570747862SJeff Cody Error *local_err = NULL; 69670747862SJeff Cody BlockDriverState *bs = NULL; 69770747862SJeff Cody uint32_t *bmap = NULL; 6989aebd98aSStefan Weil 6999aebd98aSStefan Weil logout("\n"); 7009aebd98aSStefan Weil 7019aebd98aSStefan Weil /* Read out options. */ 702c2eb918eSHu Tao bytes = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), 703c2eb918eSHu Tao BDRV_SECTOR_SIZE); 7049aebd98aSStefan Weil #if defined(CONFIG_VDI_BLOCK_SIZE) 7059aebd98aSStefan Weil /* TODO: Additional checks (SECTOR_SIZE * 2^n, ...). */ 706004b7f25SChunyan Liu block_size = qemu_opt_get_size_del(opts, 707004b7f25SChunyan Liu BLOCK_OPT_CLUSTER_SIZE, 708004b7f25SChunyan Liu DEFAULT_CLUSTER_SIZE); 7099aebd98aSStefan Weil #endif 7109aebd98aSStefan Weil #if defined(CONFIG_VDI_STATIC_IMAGE) 711004b7f25SChunyan Liu if (qemu_opt_get_bool_del(opts, BLOCK_OPT_STATIC, false)) { 7129aebd98aSStefan Weil image_type = VDI_TYPE_STATIC; 7136eea90ebSStefan Weil } 7149aebd98aSStefan Weil #endif 7159aebd98aSStefan Weil 71663fa06dcSJeff Cody if (bytes > VDI_DISK_SIZE_MAX) { 717dddc7750SJeff Cody ret = -ENOTSUP; 71863fa06dcSJeff Cody error_setg(errp, "Unsupported VDI image size (size is 0x%" PRIx64 71963fa06dcSJeff Cody ", max supported is 0x%" PRIx64 ")", 72063fa06dcSJeff Cody bytes, VDI_DISK_SIZE_MAX); 72163fa06dcSJeff Cody goto exit; 72263fa06dcSJeff Cody } 72363fa06dcSJeff Cody 724dddc7750SJeff Cody ret = bdrv_create_file(filename, opts, &local_err); 725dddc7750SJeff Cody if (ret < 0) { 72670747862SJeff Cody error_propagate(errp, local_err); 72763fa06dcSJeff Cody goto exit; 7289aebd98aSStefan Weil } 729dddc7750SJeff Cody ret = bdrv_open(&bs, filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_PROTOCOL, 73070747862SJeff Cody NULL, &local_err); 731dddc7750SJeff Cody if (ret < 0) { 73270747862SJeff Cody error_propagate(errp, local_err); 73370747862SJeff Cody goto exit; 7344ab15590SChunyan Liu } 7354ab15590SChunyan Liu 736f21dc3a4SStefan Weil /* We need enough blocks to store the given disk size, 737f21dc3a4SStefan Weil so always round up. */ 738*e9082e47SMax Reitz blocks = DIV_ROUND_UP(bytes, block_size); 739f21dc3a4SStefan Weil 7409aebd98aSStefan Weil bmap_size = blocks * sizeof(uint32_t); 741*e9082e47SMax Reitz bmap_size = ROUND_UP(bmap_size, SECTOR_SIZE); 7429aebd98aSStefan Weil 7439aebd98aSStefan Weil memset(&header, 0, sizeof(header)); 7441786dc15SBlue Swirl pstrcpy(header.text, sizeof(header.text), VDI_TEXT); 7459aebd98aSStefan Weil header.signature = VDI_SIGNATURE; 7469aebd98aSStefan Weil header.version = VDI_VERSION_1_1; 7479aebd98aSStefan Weil header.header_size = 0x180; 7489aebd98aSStefan Weil header.image_type = image_type; 7499aebd98aSStefan Weil header.offset_bmap = 0x200; 7509aebd98aSStefan Weil header.offset_data = 0x200 + bmap_size; 7519aebd98aSStefan Weil header.sector_size = SECTOR_SIZE; 7529aebd98aSStefan Weil header.disk_size = bytes; 7539aebd98aSStefan Weil header.block_size = block_size; 7549aebd98aSStefan Weil header.blocks_in_image = blocks; 7556eea90ebSStefan Weil if (image_type == VDI_TYPE_STATIC) { 7566eea90ebSStefan Weil header.blocks_allocated = blocks; 7576eea90ebSStefan Weil } 7589aebd98aSStefan Weil uuid_generate(header.uuid_image); 7599aebd98aSStefan Weil uuid_generate(header.uuid_last_snap); 7609aebd98aSStefan Weil /* There is no need to set header.uuid_link or header.uuid_parent here. */ 7619aebd98aSStefan Weil #if defined(CONFIG_VDI_DEBUG) 7629aebd98aSStefan Weil vdi_header_print(&header); 7639aebd98aSStefan Weil #endif 7649aebd98aSStefan Weil vdi_header_to_le(&header); 765dddc7750SJeff Cody ret = bdrv_pwrite_sync(bs, offset, &header, sizeof(header)); 766dddc7750SJeff Cody if (ret < 0) { 76770747862SJeff Cody error_setg(errp, "Error writing header to %s", filename); 76870747862SJeff Cody goto exit; 7699aebd98aSStefan Weil } 77070747862SJeff Cody offset += sizeof(header); 7719aebd98aSStefan Weil 772b76b6e95SStefan Weil if (bmap_size > 0) { 77317cce735SKevin Wolf bmap = g_try_malloc0(bmap_size); 77417cce735SKevin Wolf if (bmap == NULL) { 77517cce735SKevin Wolf ret = -ENOMEM; 77617cce735SKevin Wolf error_setg(errp, "Could not allocate bmap"); 77717cce735SKevin Wolf goto exit; 77817cce735SKevin Wolf } 7799aebd98aSStefan Weil for (i = 0; i < blocks; i++) { 7809aebd98aSStefan Weil if (image_type == VDI_TYPE_STATIC) { 7819aebd98aSStefan Weil bmap[i] = i; 7829aebd98aSStefan Weil } else { 7839aebd98aSStefan Weil bmap[i] = VDI_UNALLOCATED; 7849aebd98aSStefan Weil } 7859aebd98aSStefan Weil } 786dddc7750SJeff Cody ret = bdrv_pwrite_sync(bs, offset, bmap, bmap_size); 787dddc7750SJeff Cody if (ret < 0) { 78870747862SJeff Cody error_setg(errp, "Error writing bmap to %s", filename); 78970747862SJeff Cody goto exit; 7909aebd98aSStefan Weil } 79170747862SJeff Cody offset += bmap_size; 792514f21a5SStefan Weil } 793514f21a5SStefan Weil 7949aebd98aSStefan Weil if (image_type == VDI_TYPE_STATIC) { 795dddc7750SJeff Cody ret = bdrv_truncate(bs, offset + blocks * block_size); 796dddc7750SJeff Cody if (ret < 0) { 79770747862SJeff Cody error_setg(errp, "Failed to statically allocate %s", filename); 79870747862SJeff Cody goto exit; 7999aebd98aSStefan Weil } 8009aebd98aSStefan Weil } 8019aebd98aSStefan Weil 80263fa06dcSJeff Cody exit: 80370747862SJeff Cody bdrv_unref(bs); 80470747862SJeff Cody g_free(bmap); 805dddc7750SJeff Cody return ret; 8069aebd98aSStefan Weil } 8079aebd98aSStefan Weil 8089aebd98aSStefan Weil static void vdi_close(BlockDriverState *bs) 8099aebd98aSStefan Weil { 810fc9d106cSKevin Wolf BDRVVdiState *s = bs->opaque; 8116ac5f388SKevin Wolf 81217cce735SKevin Wolf qemu_vfree(s->bmap); 8136ac5f388SKevin Wolf 814fc9d106cSKevin Wolf migrate_del_blocker(s->migration_blocker); 815fc9d106cSKevin Wolf error_free(s->migration_blocker); 8169aebd98aSStefan Weil } 8179aebd98aSStefan Weil 818004b7f25SChunyan Liu static QemuOptsList vdi_create_opts = { 819004b7f25SChunyan Liu .name = "vdi-create-opts", 820004b7f25SChunyan Liu .head = QTAILQ_HEAD_INITIALIZER(vdi_create_opts.head), 821004b7f25SChunyan Liu .desc = { 8229aebd98aSStefan Weil { 8239aebd98aSStefan Weil .name = BLOCK_OPT_SIZE, 824004b7f25SChunyan Liu .type = QEMU_OPT_SIZE, 8259aebd98aSStefan Weil .help = "Virtual disk size" 8269aebd98aSStefan Weil }, 8279aebd98aSStefan Weil #if defined(CONFIG_VDI_BLOCK_SIZE) 8289aebd98aSStefan Weil { 8299aebd98aSStefan Weil .name = BLOCK_OPT_CLUSTER_SIZE, 830004b7f25SChunyan Liu .type = QEMU_OPT_SIZE, 83199cce9faSKevin Wolf .help = "VDI cluster (block) size", 832004b7f25SChunyan Liu .def_value_str = stringify(DEFAULT_CLUSTER_SIZE) 8339aebd98aSStefan Weil }, 8349aebd98aSStefan Weil #endif 8359aebd98aSStefan Weil #if defined(CONFIG_VDI_STATIC_IMAGE) 8369aebd98aSStefan Weil { 8379aebd98aSStefan Weil .name = BLOCK_OPT_STATIC, 838004b7f25SChunyan Liu .type = QEMU_OPT_BOOL, 839004b7f25SChunyan Liu .help = "VDI static (pre-allocated) image", 840004b7f25SChunyan Liu .def_value_str = "off" 8419aebd98aSStefan Weil }, 8429aebd98aSStefan Weil #endif 8434ab15590SChunyan Liu { 8444ab15590SChunyan Liu .name = BLOCK_OPT_NOCOW, 8454ab15590SChunyan Liu .type = QEMU_OPT_BOOL, 8464ab15590SChunyan Liu .help = "Turn off copy-on-write (valid only on btrfs)" 8474ab15590SChunyan Liu }, 8489aebd98aSStefan Weil /* TODO: An additional option to set UUID values might be useful. */ 849004b7f25SChunyan Liu { /* end of list */ } 850004b7f25SChunyan Liu } 8519aebd98aSStefan Weil }; 8529aebd98aSStefan Weil 8539aebd98aSStefan Weil static BlockDriver bdrv_vdi = { 8549aebd98aSStefan Weil .format_name = "vdi", 8559aebd98aSStefan Weil .instance_size = sizeof(BDRVVdiState), 8569aebd98aSStefan Weil .bdrv_probe = vdi_probe, 8579aebd98aSStefan Weil .bdrv_open = vdi_open, 8589aebd98aSStefan Weil .bdrv_close = vdi_close, 859ecfe2bbaSJeff Cody .bdrv_reopen_prepare = vdi_reopen_prepare, 860c282e1fdSChunyan Liu .bdrv_create = vdi_create, 8613ac21627SPeter Lieven .bdrv_has_zero_init = bdrv_has_zero_init_1, 862b6b8a333SPaolo Bonzini .bdrv_co_get_block_status = vdi_co_get_block_status, 8639aebd98aSStefan Weil .bdrv_make_empty = vdi_make_empty, 8649aebd98aSStefan Weil 865a7a43aa1SPaolo Bonzini .bdrv_read = vdi_co_read, 8669aebd98aSStefan Weil #if defined(CONFIG_VDI_WRITE) 867a7a43aa1SPaolo Bonzini .bdrv_write = vdi_co_write, 8689aebd98aSStefan Weil #endif 8699aebd98aSStefan Weil 8709aebd98aSStefan Weil .bdrv_get_info = vdi_get_info, 8719aebd98aSStefan Weil 872004b7f25SChunyan Liu .create_opts = &vdi_create_opts, 8739aebd98aSStefan Weil .bdrv_check = vdi_check, 8749aebd98aSStefan Weil }; 8759aebd98aSStefan Weil 8769aebd98aSStefan Weil static void bdrv_vdi_init(void) 8779aebd98aSStefan Weil { 8789aebd98aSStefan Weil logout("\n"); 8799aebd98aSStefan Weil bdrv_register(&bdrv_vdi); 8809aebd98aSStefan Weil } 8819aebd98aSStefan Weil 8829aebd98aSStefan Weil block_init(bdrv_vdi_init); 883