1019d6b8fSAnthony Liguori /* 2cc2040f8SStefan Weil * Block driver for Connectix / Microsoft Virtual PC images 3019d6b8fSAnthony Liguori * 4019d6b8fSAnthony Liguori * Copyright (c) 2005 Alex Beregszaszi 5019d6b8fSAnthony Liguori * Copyright (c) 2009 Kevin Wolf <kwolf@suse.de> 6019d6b8fSAnthony Liguori * 7019d6b8fSAnthony Liguori * Permission is hereby granted, free of charge, to any person obtaining a copy 8019d6b8fSAnthony Liguori * of this software and associated documentation files (the "Software"), to deal 9019d6b8fSAnthony Liguori * in the Software without restriction, including without limitation the rights 10019d6b8fSAnthony Liguori * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11019d6b8fSAnthony Liguori * copies of the Software, and to permit persons to whom the Software is 12019d6b8fSAnthony Liguori * furnished to do so, subject to the following conditions: 13019d6b8fSAnthony Liguori * 14019d6b8fSAnthony Liguori * The above copyright notice and this permission notice shall be included in 15019d6b8fSAnthony Liguori * all copies or substantial portions of the Software. 16019d6b8fSAnthony Liguori * 17019d6b8fSAnthony Liguori * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18019d6b8fSAnthony Liguori * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19019d6b8fSAnthony Liguori * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20019d6b8fSAnthony Liguori * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21019d6b8fSAnthony Liguori * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22019d6b8fSAnthony Liguori * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 23019d6b8fSAnthony Liguori * THE SOFTWARE. 24019d6b8fSAnthony Liguori */ 25019d6b8fSAnthony Liguori #include "qemu-common.h" 26019d6b8fSAnthony Liguori #include "block_int.h" 27019d6b8fSAnthony Liguori #include "module.h" 28612ff3d8SKevin Wolf #include "migration.h" 29019d6b8fSAnthony Liguori 30019d6b8fSAnthony Liguori /**************************************************************/ 31019d6b8fSAnthony Liguori 32019d6b8fSAnthony Liguori #define HEADER_SIZE 512 33019d6b8fSAnthony Liguori 34019d6b8fSAnthony Liguori //#define CACHE 35019d6b8fSAnthony Liguori 36019d6b8fSAnthony Liguori enum vhd_type { 37019d6b8fSAnthony Liguori VHD_FIXED = 2, 38019d6b8fSAnthony Liguori VHD_DYNAMIC = 3, 39019d6b8fSAnthony Liguori VHD_DIFFERENCING = 4, 40019d6b8fSAnthony Liguori }; 41019d6b8fSAnthony Liguori 42019d6b8fSAnthony Liguori // Seconds since Jan 1, 2000 0:00:00 (UTC) 43019d6b8fSAnthony Liguori #define VHD_TIMESTAMP_BASE 946684800 44019d6b8fSAnthony Liguori 45019d6b8fSAnthony Liguori // always big-endian 46019d6b8fSAnthony Liguori struct vhd_footer { 47019d6b8fSAnthony Liguori char creator[8]; // "conectix" 48019d6b8fSAnthony Liguori uint32_t features; 49019d6b8fSAnthony Liguori uint32_t version; 50019d6b8fSAnthony Liguori 51019d6b8fSAnthony Liguori // Offset of next header structure, 0xFFFFFFFF if none 52019d6b8fSAnthony Liguori uint64_t data_offset; 53019d6b8fSAnthony Liguori 54019d6b8fSAnthony Liguori // Seconds since Jan 1, 2000 0:00:00 (UTC) 55019d6b8fSAnthony Liguori uint32_t timestamp; 56019d6b8fSAnthony Liguori 57019d6b8fSAnthony Liguori char creator_app[4]; // "vpc " 58019d6b8fSAnthony Liguori uint16_t major; 59019d6b8fSAnthony Liguori uint16_t minor; 60019d6b8fSAnthony Liguori char creator_os[4]; // "Wi2k" 61019d6b8fSAnthony Liguori 62019d6b8fSAnthony Liguori uint64_t orig_size; 63019d6b8fSAnthony Liguori uint64_t size; 64019d6b8fSAnthony Liguori 65019d6b8fSAnthony Liguori uint16_t cyls; 66019d6b8fSAnthony Liguori uint8_t heads; 67019d6b8fSAnthony Liguori uint8_t secs_per_cyl; 68019d6b8fSAnthony Liguori 69019d6b8fSAnthony Liguori uint32_t type; 70019d6b8fSAnthony Liguori 71019d6b8fSAnthony Liguori // Checksum of the Hard Disk Footer ("one's complement of the sum of all 72019d6b8fSAnthony Liguori // the bytes in the footer without the checksum field") 73019d6b8fSAnthony Liguori uint32_t checksum; 74019d6b8fSAnthony Liguori 75019d6b8fSAnthony Liguori // UUID used to identify a parent hard disk (backing file) 76019d6b8fSAnthony Liguori uint8_t uuid[16]; 77019d6b8fSAnthony Liguori 78019d6b8fSAnthony Liguori uint8_t in_saved_state; 79019d6b8fSAnthony Liguori }; 80019d6b8fSAnthony Liguori 81019d6b8fSAnthony Liguori struct vhd_dyndisk_header { 82019d6b8fSAnthony Liguori char magic[8]; // "cxsparse" 83019d6b8fSAnthony Liguori 84019d6b8fSAnthony Liguori // Offset of next header structure, 0xFFFFFFFF if none 85019d6b8fSAnthony Liguori uint64_t data_offset; 86019d6b8fSAnthony Liguori 87019d6b8fSAnthony Liguori // Offset of the Block Allocation Table (BAT) 88019d6b8fSAnthony Liguori uint64_t table_offset; 89019d6b8fSAnthony Liguori 90019d6b8fSAnthony Liguori uint32_t version; 91019d6b8fSAnthony Liguori uint32_t max_table_entries; // 32bit/entry 92019d6b8fSAnthony Liguori 93019d6b8fSAnthony Liguori // 2 MB by default, must be a power of two 94019d6b8fSAnthony Liguori uint32_t block_size; 95019d6b8fSAnthony Liguori 96019d6b8fSAnthony Liguori uint32_t checksum; 97019d6b8fSAnthony Liguori uint8_t parent_uuid[16]; 98019d6b8fSAnthony Liguori uint32_t parent_timestamp; 99019d6b8fSAnthony Liguori uint32_t reserved; 100019d6b8fSAnthony Liguori 101019d6b8fSAnthony Liguori // Backing file name (in UTF-16) 102019d6b8fSAnthony Liguori uint8_t parent_name[512]; 103019d6b8fSAnthony Liguori 104019d6b8fSAnthony Liguori struct { 105019d6b8fSAnthony Liguori uint32_t platform; 106019d6b8fSAnthony Liguori uint32_t data_space; 107019d6b8fSAnthony Liguori uint32_t data_length; 108019d6b8fSAnthony Liguori uint32_t reserved; 109019d6b8fSAnthony Liguori uint64_t data_offset; 110019d6b8fSAnthony Liguori } parent_locator[8]; 111019d6b8fSAnthony Liguori }; 112019d6b8fSAnthony Liguori 113019d6b8fSAnthony Liguori typedef struct BDRVVPCState { 114848c66e8SPaolo Bonzini CoMutex lock; 115019d6b8fSAnthony Liguori uint8_t footer_buf[HEADER_SIZE]; 116019d6b8fSAnthony Liguori uint64_t free_data_block_offset; 117019d6b8fSAnthony Liguori int max_table_entries; 118019d6b8fSAnthony Liguori uint32_t *pagetable; 119019d6b8fSAnthony Liguori uint64_t bat_offset; 120019d6b8fSAnthony Liguori uint64_t last_bitmap_offset; 121019d6b8fSAnthony Liguori 122019d6b8fSAnthony Liguori uint32_t block_size; 123019d6b8fSAnthony Liguori uint32_t bitmap_size; 124019d6b8fSAnthony Liguori 125019d6b8fSAnthony Liguori #ifdef CACHE 126019d6b8fSAnthony Liguori uint8_t *pageentry_u8; 127019d6b8fSAnthony Liguori uint32_t *pageentry_u32; 128019d6b8fSAnthony Liguori uint16_t *pageentry_u16; 129019d6b8fSAnthony Liguori 130019d6b8fSAnthony Liguori uint64_t last_bitmap; 131019d6b8fSAnthony Liguori #endif 132612ff3d8SKevin Wolf 133612ff3d8SKevin Wolf Error *migration_blocker; 134019d6b8fSAnthony Liguori } BDRVVPCState; 135019d6b8fSAnthony Liguori 136019d6b8fSAnthony Liguori static uint32_t vpc_checksum(uint8_t* buf, size_t size) 137019d6b8fSAnthony Liguori { 138019d6b8fSAnthony Liguori uint32_t res = 0; 139019d6b8fSAnthony Liguori int i; 140019d6b8fSAnthony Liguori 141019d6b8fSAnthony Liguori for (i = 0; i < size; i++) 142019d6b8fSAnthony Liguori res += buf[i]; 143019d6b8fSAnthony Liguori 144019d6b8fSAnthony Liguori return ~res; 145019d6b8fSAnthony Liguori } 146019d6b8fSAnthony Liguori 147019d6b8fSAnthony Liguori 148019d6b8fSAnthony Liguori static int vpc_probe(const uint8_t *buf, int buf_size, const char *filename) 149019d6b8fSAnthony Liguori { 150019d6b8fSAnthony Liguori if (buf_size >= 8 && !strncmp((char *)buf, "conectix", 8)) 151019d6b8fSAnthony Liguori return 100; 152019d6b8fSAnthony Liguori return 0; 153019d6b8fSAnthony Liguori } 154019d6b8fSAnthony Liguori 15566f82ceeSKevin Wolf static int vpc_open(BlockDriverState *bs, int flags) 156019d6b8fSAnthony Liguori { 157019d6b8fSAnthony Liguori BDRVVPCState *s = bs->opaque; 15866f82ceeSKevin Wolf int i; 159019d6b8fSAnthony Liguori struct vhd_footer* footer; 160019d6b8fSAnthony Liguori struct vhd_dyndisk_header* dyndisk_header; 161019d6b8fSAnthony Liguori uint8_t buf[HEADER_SIZE]; 162019d6b8fSAnthony Liguori uint32_t checksum; 163efc8243dSSerge E. Hallyn int err = -1; 16424da78dbSCharles Arnold int disk_type = VHD_DYNAMIC; 165019d6b8fSAnthony Liguori 16666f82ceeSKevin Wolf if (bdrv_pread(bs->file, 0, s->footer_buf, HEADER_SIZE) != HEADER_SIZE) 167019d6b8fSAnthony Liguori goto fail; 168019d6b8fSAnthony Liguori 169019d6b8fSAnthony Liguori footer = (struct vhd_footer*) s->footer_buf; 17024da78dbSCharles Arnold if (strncmp(footer->creator, "conectix", 8)) { 17124da78dbSCharles Arnold int64_t offset = bdrv_getlength(bs->file); 17224da78dbSCharles Arnold if (offset < HEADER_SIZE) { 173019d6b8fSAnthony Liguori goto fail; 17424da78dbSCharles Arnold } 17524da78dbSCharles Arnold /* If a fixed disk, the footer is found only at the end of the file */ 17624da78dbSCharles Arnold if (bdrv_pread(bs->file, offset-HEADER_SIZE, s->footer_buf, HEADER_SIZE) 17724da78dbSCharles Arnold != HEADER_SIZE) { 17824da78dbSCharles Arnold goto fail; 17924da78dbSCharles Arnold } 18024da78dbSCharles Arnold if (strncmp(footer->creator, "conectix", 8)) { 18124da78dbSCharles Arnold goto fail; 18224da78dbSCharles Arnold } 18324da78dbSCharles Arnold disk_type = VHD_FIXED; 18424da78dbSCharles Arnold } 185019d6b8fSAnthony Liguori 186019d6b8fSAnthony Liguori checksum = be32_to_cpu(footer->checksum); 187019d6b8fSAnthony Liguori footer->checksum = 0; 188019d6b8fSAnthony Liguori if (vpc_checksum(s->footer_buf, HEADER_SIZE) != checksum) 189019d6b8fSAnthony Liguori fprintf(stderr, "block-vpc: The header checksum of '%s' is " 19066f82ceeSKevin Wolf "incorrect.\n", bs->filename); 191019d6b8fSAnthony Liguori 192019d6b8fSAnthony Liguori // The visible size of a image in Virtual PC depends on the geometry 193019d6b8fSAnthony Liguori // rather than on the size stored in the footer (the size in the footer 194019d6b8fSAnthony Liguori // is too large usually) 195019d6b8fSAnthony Liguori bs->total_sectors = (int64_t) 196019d6b8fSAnthony Liguori be16_to_cpu(footer->cyls) * footer->heads * footer->secs_per_cyl; 197019d6b8fSAnthony Liguori 198efc8243dSSerge E. Hallyn if (bs->total_sectors >= 65535 * 16 * 255) { 199efc8243dSSerge E. Hallyn err = -EFBIG; 200efc8243dSSerge E. Hallyn goto fail; 201efc8243dSSerge E. Hallyn } 202efc8243dSSerge E. Hallyn 20324da78dbSCharles Arnold if (disk_type == VHD_DYNAMIC) { 20424da78dbSCharles Arnold if (bdrv_pread(bs->file, be64_to_cpu(footer->data_offset), buf, 20524da78dbSCharles Arnold HEADER_SIZE) != HEADER_SIZE) { 206019d6b8fSAnthony Liguori goto fail; 20724da78dbSCharles Arnold } 208019d6b8fSAnthony Liguori 209019d6b8fSAnthony Liguori dyndisk_header = (struct vhd_dyndisk_header *) buf; 210019d6b8fSAnthony Liguori 21124da78dbSCharles Arnold if (strncmp(dyndisk_header->magic, "cxsparse", 8)) { 212019d6b8fSAnthony Liguori goto fail; 21324da78dbSCharles Arnold } 214019d6b8fSAnthony Liguori 215019d6b8fSAnthony Liguori s->block_size = be32_to_cpu(dyndisk_header->block_size); 216019d6b8fSAnthony Liguori s->bitmap_size = ((s->block_size / (8 * 512)) + 511) & ~511; 217019d6b8fSAnthony Liguori 218019d6b8fSAnthony Liguori s->max_table_entries = be32_to_cpu(dyndisk_header->max_table_entries); 2197267c094SAnthony Liguori s->pagetable = g_malloc(s->max_table_entries * 4); 220019d6b8fSAnthony Liguori 221019d6b8fSAnthony Liguori s->bat_offset = be64_to_cpu(dyndisk_header->table_offset); 22266f82ceeSKevin Wolf if (bdrv_pread(bs->file, s->bat_offset, s->pagetable, 22324da78dbSCharles Arnold s->max_table_entries * 4) != s->max_table_entries * 4) { 224019d6b8fSAnthony Liguori goto fail; 22524da78dbSCharles Arnold } 226019d6b8fSAnthony Liguori 227019d6b8fSAnthony Liguori s->free_data_block_offset = 228019d6b8fSAnthony Liguori (s->bat_offset + (s->max_table_entries * 4) + 511) & ~511; 229019d6b8fSAnthony Liguori 230019d6b8fSAnthony Liguori for (i = 0; i < s->max_table_entries; i++) { 231019d6b8fSAnthony Liguori be32_to_cpus(&s->pagetable[i]); 232019d6b8fSAnthony Liguori if (s->pagetable[i] != 0xFFFFFFFF) { 233019d6b8fSAnthony Liguori int64_t next = (512 * (int64_t) s->pagetable[i]) + 234019d6b8fSAnthony Liguori s->bitmap_size + s->block_size; 235019d6b8fSAnthony Liguori 23624da78dbSCharles Arnold if (next > s->free_data_block_offset) { 237019d6b8fSAnthony Liguori s->free_data_block_offset = next; 238019d6b8fSAnthony Liguori } 239019d6b8fSAnthony Liguori } 24024da78dbSCharles Arnold } 241019d6b8fSAnthony Liguori 242019d6b8fSAnthony Liguori s->last_bitmap_offset = (int64_t) -1; 243019d6b8fSAnthony Liguori 244019d6b8fSAnthony Liguori #ifdef CACHE 2457267c094SAnthony Liguori s->pageentry_u8 = g_malloc(512); 246019d6b8fSAnthony Liguori s->pageentry_u32 = s->pageentry_u8; 247019d6b8fSAnthony Liguori s->pageentry_u16 = s->pageentry_u8; 248019d6b8fSAnthony Liguori s->last_pagetable = -1; 249019d6b8fSAnthony Liguori #endif 25024da78dbSCharles Arnold } 251019d6b8fSAnthony Liguori 252848c66e8SPaolo Bonzini qemu_co_mutex_init(&s->lock); 253612ff3d8SKevin Wolf 254612ff3d8SKevin Wolf /* Disable migration when VHD images are used */ 255612ff3d8SKevin Wolf error_set(&s->migration_blocker, 256612ff3d8SKevin Wolf QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED, 257612ff3d8SKevin Wolf "vpc", bs->device_name, "live migration"); 258612ff3d8SKevin Wolf migrate_add_blocker(s->migration_blocker); 259612ff3d8SKevin Wolf 260019d6b8fSAnthony Liguori return 0; 261019d6b8fSAnthony Liguori fail: 262efc8243dSSerge E. Hallyn return err; 263019d6b8fSAnthony Liguori } 264019d6b8fSAnthony Liguori 265019d6b8fSAnthony Liguori /* 266019d6b8fSAnthony Liguori * Returns the absolute byte offset of the given sector in the image file. 267019d6b8fSAnthony Liguori * If the sector is not allocated, -1 is returned instead. 268019d6b8fSAnthony Liguori * 269019d6b8fSAnthony Liguori * The parameter write must be 1 if the offset will be used for a write 270019d6b8fSAnthony Liguori * operation (the block bitmaps is updated then), 0 otherwise. 271019d6b8fSAnthony Liguori */ 272019d6b8fSAnthony Liguori static inline int64_t get_sector_offset(BlockDriverState *bs, 273019d6b8fSAnthony Liguori int64_t sector_num, int write) 274019d6b8fSAnthony Liguori { 275019d6b8fSAnthony Liguori BDRVVPCState *s = bs->opaque; 276019d6b8fSAnthony Liguori uint64_t offset = sector_num * 512; 277019d6b8fSAnthony Liguori uint64_t bitmap_offset, block_offset; 278019d6b8fSAnthony Liguori uint32_t pagetable_index, pageentry_index; 279019d6b8fSAnthony Liguori 280019d6b8fSAnthony Liguori pagetable_index = offset / s->block_size; 281019d6b8fSAnthony Liguori pageentry_index = (offset % s->block_size) / 512; 282019d6b8fSAnthony Liguori 283019d6b8fSAnthony Liguori if (pagetable_index >= s->max_table_entries || s->pagetable[pagetable_index] == 0xffffffff) 284019d6b8fSAnthony Liguori return -1; // not allocated 285019d6b8fSAnthony Liguori 286019d6b8fSAnthony Liguori bitmap_offset = 512 * (uint64_t) s->pagetable[pagetable_index]; 287019d6b8fSAnthony Liguori block_offset = bitmap_offset + s->bitmap_size + (512 * pageentry_index); 288019d6b8fSAnthony Liguori 289019d6b8fSAnthony Liguori // We must ensure that we don't write to any sectors which are marked as 290019d6b8fSAnthony Liguori // unused in the bitmap. We get away with setting all bits in the block 291019d6b8fSAnthony Liguori // bitmap each time we write to a new block. This might cause Virtual PC to 292019d6b8fSAnthony Liguori // miss sparse read optimization, but it's not a problem in terms of 293019d6b8fSAnthony Liguori // correctness. 294019d6b8fSAnthony Liguori if (write && (s->last_bitmap_offset != bitmap_offset)) { 295019d6b8fSAnthony Liguori uint8_t bitmap[s->bitmap_size]; 296019d6b8fSAnthony Liguori 297019d6b8fSAnthony Liguori s->last_bitmap_offset = bitmap_offset; 298019d6b8fSAnthony Liguori memset(bitmap, 0xff, s->bitmap_size); 299078a458eSKevin Wolf bdrv_pwrite_sync(bs->file, bitmap_offset, bitmap, s->bitmap_size); 300019d6b8fSAnthony Liguori } 301019d6b8fSAnthony Liguori 302019d6b8fSAnthony Liguori // printf("sector: %" PRIx64 ", index: %x, offset: %x, bioff: %" PRIx64 ", bloff: %" PRIx64 "\n", 303019d6b8fSAnthony Liguori // sector_num, pagetable_index, pageentry_index, 304019d6b8fSAnthony Liguori // bitmap_offset, block_offset); 305019d6b8fSAnthony Liguori 306019d6b8fSAnthony Liguori // disabled by reason 307019d6b8fSAnthony Liguori #if 0 308019d6b8fSAnthony Liguori #ifdef CACHE 309019d6b8fSAnthony Liguori if (bitmap_offset != s->last_bitmap) 310019d6b8fSAnthony Liguori { 311019d6b8fSAnthony Liguori lseek(s->fd, bitmap_offset, SEEK_SET); 312019d6b8fSAnthony Liguori 313019d6b8fSAnthony Liguori s->last_bitmap = bitmap_offset; 314019d6b8fSAnthony Liguori 315019d6b8fSAnthony Liguori // Scary! Bitmap is stored as big endian 32bit entries, 316019d6b8fSAnthony Liguori // while we used to look it up byte by byte 317019d6b8fSAnthony Liguori read(s->fd, s->pageentry_u8, 512); 318019d6b8fSAnthony Liguori for (i = 0; i < 128; i++) 319019d6b8fSAnthony Liguori be32_to_cpus(&s->pageentry_u32[i]); 320019d6b8fSAnthony Liguori } 321019d6b8fSAnthony Liguori 322019d6b8fSAnthony Liguori if ((s->pageentry_u8[pageentry_index / 8] >> (pageentry_index % 8)) & 1) 323019d6b8fSAnthony Liguori return -1; 324019d6b8fSAnthony Liguori #else 325019d6b8fSAnthony Liguori lseek(s->fd, bitmap_offset + (pageentry_index / 8), SEEK_SET); 326019d6b8fSAnthony Liguori 327019d6b8fSAnthony Liguori read(s->fd, &bitmap_entry, 1); 328019d6b8fSAnthony Liguori 329019d6b8fSAnthony Liguori if ((bitmap_entry >> (pageentry_index % 8)) & 1) 330019d6b8fSAnthony Liguori return -1; // not allocated 331019d6b8fSAnthony Liguori #endif 332019d6b8fSAnthony Liguori #endif 333019d6b8fSAnthony Liguori 334019d6b8fSAnthony Liguori return block_offset; 335019d6b8fSAnthony Liguori } 336019d6b8fSAnthony Liguori 337019d6b8fSAnthony Liguori /* 338019d6b8fSAnthony Liguori * Writes the footer to the end of the image file. This is needed when the 339019d6b8fSAnthony Liguori * file grows as it overwrites the old footer 340019d6b8fSAnthony Liguori * 341019d6b8fSAnthony Liguori * Returns 0 on success and < 0 on error 342019d6b8fSAnthony Liguori */ 343019d6b8fSAnthony Liguori static int rewrite_footer(BlockDriverState* bs) 344019d6b8fSAnthony Liguori { 345019d6b8fSAnthony Liguori int ret; 346019d6b8fSAnthony Liguori BDRVVPCState *s = bs->opaque; 347019d6b8fSAnthony Liguori int64_t offset = s->free_data_block_offset; 348019d6b8fSAnthony Liguori 349078a458eSKevin Wolf ret = bdrv_pwrite_sync(bs->file, offset, s->footer_buf, HEADER_SIZE); 350019d6b8fSAnthony Liguori if (ret < 0) 351019d6b8fSAnthony Liguori return ret; 352019d6b8fSAnthony Liguori 353019d6b8fSAnthony Liguori return 0; 354019d6b8fSAnthony Liguori } 355019d6b8fSAnthony Liguori 356019d6b8fSAnthony Liguori /* 357019d6b8fSAnthony Liguori * Allocates a new block. This involves writing a new footer and updating 358019d6b8fSAnthony Liguori * the Block Allocation Table to use the space at the old end of the image 359019d6b8fSAnthony Liguori * file (overwriting the old footer) 360019d6b8fSAnthony Liguori * 361019d6b8fSAnthony Liguori * Returns the sectors' offset in the image file on success and < 0 on error 362019d6b8fSAnthony Liguori */ 363019d6b8fSAnthony Liguori static int64_t alloc_block(BlockDriverState* bs, int64_t sector_num) 364019d6b8fSAnthony Liguori { 365019d6b8fSAnthony Liguori BDRVVPCState *s = bs->opaque; 366019d6b8fSAnthony Liguori int64_t bat_offset; 367019d6b8fSAnthony Liguori uint32_t index, bat_value; 368019d6b8fSAnthony Liguori int ret; 369019d6b8fSAnthony Liguori uint8_t bitmap[s->bitmap_size]; 370019d6b8fSAnthony Liguori 371019d6b8fSAnthony Liguori // Check if sector_num is valid 372019d6b8fSAnthony Liguori if ((sector_num < 0) || (sector_num > bs->total_sectors)) 373019d6b8fSAnthony Liguori return -1; 374019d6b8fSAnthony Liguori 375019d6b8fSAnthony Liguori // Write entry into in-memory BAT 376019d6b8fSAnthony Liguori index = (sector_num * 512) / s->block_size; 377019d6b8fSAnthony Liguori if (s->pagetable[index] != 0xFFFFFFFF) 378019d6b8fSAnthony Liguori return -1; 379019d6b8fSAnthony Liguori 380019d6b8fSAnthony Liguori s->pagetable[index] = s->free_data_block_offset / 512; 381019d6b8fSAnthony Liguori 382019d6b8fSAnthony Liguori // Initialize the block's bitmap 383019d6b8fSAnthony Liguori memset(bitmap, 0xff, s->bitmap_size); 3845bb1cbacSKevin Wolf ret = bdrv_pwrite_sync(bs->file, s->free_data_block_offset, bitmap, 385078a458eSKevin Wolf s->bitmap_size); 3865bb1cbacSKevin Wolf if (ret < 0) { 3875bb1cbacSKevin Wolf return ret; 3885bb1cbacSKevin Wolf } 389019d6b8fSAnthony Liguori 390019d6b8fSAnthony Liguori // Write new footer (the old one will be overwritten) 391019d6b8fSAnthony Liguori s->free_data_block_offset += s->block_size + s->bitmap_size; 392019d6b8fSAnthony Liguori ret = rewrite_footer(bs); 393019d6b8fSAnthony Liguori if (ret < 0) 394019d6b8fSAnthony Liguori goto fail; 395019d6b8fSAnthony Liguori 396019d6b8fSAnthony Liguori // Write BAT entry to disk 397019d6b8fSAnthony Liguori bat_offset = s->bat_offset + (4 * index); 398019d6b8fSAnthony Liguori bat_value = be32_to_cpu(s->pagetable[index]); 399078a458eSKevin Wolf ret = bdrv_pwrite_sync(bs->file, bat_offset, &bat_value, 4); 400019d6b8fSAnthony Liguori if (ret < 0) 401019d6b8fSAnthony Liguori goto fail; 402019d6b8fSAnthony Liguori 403019d6b8fSAnthony Liguori return get_sector_offset(bs, sector_num, 0); 404019d6b8fSAnthony Liguori 405019d6b8fSAnthony Liguori fail: 406019d6b8fSAnthony Liguori s->free_data_block_offset -= (s->block_size + s->bitmap_size); 407019d6b8fSAnthony Liguori return -1; 408019d6b8fSAnthony Liguori } 409019d6b8fSAnthony Liguori 410019d6b8fSAnthony Liguori static int vpc_read(BlockDriverState *bs, int64_t sector_num, 411019d6b8fSAnthony Liguori uint8_t *buf, int nb_sectors) 412019d6b8fSAnthony Liguori { 4136c6ea921SKevin Wolf BDRVVPCState *s = bs->opaque; 414019d6b8fSAnthony Liguori int ret; 415019d6b8fSAnthony Liguori int64_t offset; 4166c6ea921SKevin Wolf int64_t sectors, sectors_per_block; 41724da78dbSCharles Arnold struct vhd_footer *footer = (struct vhd_footer *) s->footer_buf; 418019d6b8fSAnthony Liguori 41924da78dbSCharles Arnold if (cpu_to_be32(footer->type) == VHD_FIXED) { 42024da78dbSCharles Arnold return bdrv_read(bs->file, sector_num, buf, nb_sectors); 42124da78dbSCharles Arnold } 422019d6b8fSAnthony Liguori while (nb_sectors > 0) { 423019d6b8fSAnthony Liguori offset = get_sector_offset(bs, sector_num, 0); 424019d6b8fSAnthony Liguori 4256c6ea921SKevin Wolf sectors_per_block = s->block_size >> BDRV_SECTOR_BITS; 4266c6ea921SKevin Wolf sectors = sectors_per_block - (sector_num % sectors_per_block); 4276c6ea921SKevin Wolf if (sectors > nb_sectors) { 4286c6ea921SKevin Wolf sectors = nb_sectors; 429019d6b8fSAnthony Liguori } 430019d6b8fSAnthony Liguori 4316c6ea921SKevin Wolf if (offset == -1) { 4326c6ea921SKevin Wolf memset(buf, 0, sectors * BDRV_SECTOR_SIZE); 4336c6ea921SKevin Wolf } else { 4346c6ea921SKevin Wolf ret = bdrv_pread(bs->file, offset, buf, 4356c6ea921SKevin Wolf sectors * BDRV_SECTOR_SIZE); 4366c6ea921SKevin Wolf if (ret != sectors * BDRV_SECTOR_SIZE) { 4376c6ea921SKevin Wolf return -1; 4386c6ea921SKevin Wolf } 4396c6ea921SKevin Wolf } 4406c6ea921SKevin Wolf 4416c6ea921SKevin Wolf nb_sectors -= sectors; 4426c6ea921SKevin Wolf sector_num += sectors; 4436c6ea921SKevin Wolf buf += sectors * BDRV_SECTOR_SIZE; 444019d6b8fSAnthony Liguori } 445019d6b8fSAnthony Liguori return 0; 446019d6b8fSAnthony Liguori } 447019d6b8fSAnthony Liguori 4482914caa0SPaolo Bonzini static coroutine_fn int vpc_co_read(BlockDriverState *bs, int64_t sector_num, 4492914caa0SPaolo Bonzini uint8_t *buf, int nb_sectors) 4502914caa0SPaolo Bonzini { 4512914caa0SPaolo Bonzini int ret; 4522914caa0SPaolo Bonzini BDRVVPCState *s = bs->opaque; 4532914caa0SPaolo Bonzini qemu_co_mutex_lock(&s->lock); 4542914caa0SPaolo Bonzini ret = vpc_read(bs, sector_num, buf, nb_sectors); 4552914caa0SPaolo Bonzini qemu_co_mutex_unlock(&s->lock); 4562914caa0SPaolo Bonzini return ret; 4572914caa0SPaolo Bonzini } 4582914caa0SPaolo Bonzini 459019d6b8fSAnthony Liguori static int vpc_write(BlockDriverState *bs, int64_t sector_num, 460019d6b8fSAnthony Liguori const uint8_t *buf, int nb_sectors) 461019d6b8fSAnthony Liguori { 4626c6ea921SKevin Wolf BDRVVPCState *s = bs->opaque; 463019d6b8fSAnthony Liguori int64_t offset; 4646c6ea921SKevin Wolf int64_t sectors, sectors_per_block; 465019d6b8fSAnthony Liguori int ret; 46624da78dbSCharles Arnold struct vhd_footer *footer = (struct vhd_footer *) s->footer_buf; 467019d6b8fSAnthony Liguori 46824da78dbSCharles Arnold if (cpu_to_be32(footer->type) == VHD_FIXED) { 46924da78dbSCharles Arnold return bdrv_write(bs->file, sector_num, buf, nb_sectors); 47024da78dbSCharles Arnold } 471019d6b8fSAnthony Liguori while (nb_sectors > 0) { 472019d6b8fSAnthony Liguori offset = get_sector_offset(bs, sector_num, 1); 473019d6b8fSAnthony Liguori 4746c6ea921SKevin Wolf sectors_per_block = s->block_size >> BDRV_SECTOR_BITS; 4756c6ea921SKevin Wolf sectors = sectors_per_block - (sector_num % sectors_per_block); 4766c6ea921SKevin Wolf if (sectors > nb_sectors) { 4776c6ea921SKevin Wolf sectors = nb_sectors; 4786c6ea921SKevin Wolf } 4796c6ea921SKevin Wolf 480019d6b8fSAnthony Liguori if (offset == -1) { 481019d6b8fSAnthony Liguori offset = alloc_block(bs, sector_num); 482019d6b8fSAnthony Liguori if (offset < 0) 483019d6b8fSAnthony Liguori return -1; 484019d6b8fSAnthony Liguori } 485019d6b8fSAnthony Liguori 4866c6ea921SKevin Wolf ret = bdrv_pwrite(bs->file, offset, buf, sectors * BDRV_SECTOR_SIZE); 4876c6ea921SKevin Wolf if (ret != sectors * BDRV_SECTOR_SIZE) { 488019d6b8fSAnthony Liguori return -1; 4896c6ea921SKevin Wolf } 490019d6b8fSAnthony Liguori 4916c6ea921SKevin Wolf nb_sectors -= sectors; 4926c6ea921SKevin Wolf sector_num += sectors; 4936c6ea921SKevin Wolf buf += sectors * BDRV_SECTOR_SIZE; 494019d6b8fSAnthony Liguori } 495019d6b8fSAnthony Liguori 496019d6b8fSAnthony Liguori return 0; 497019d6b8fSAnthony Liguori } 498019d6b8fSAnthony Liguori 499e183ef75SPaolo Bonzini static coroutine_fn int vpc_co_write(BlockDriverState *bs, int64_t sector_num, 500e183ef75SPaolo Bonzini const uint8_t *buf, int nb_sectors) 501e183ef75SPaolo Bonzini { 502e183ef75SPaolo Bonzini int ret; 503e183ef75SPaolo Bonzini BDRVVPCState *s = bs->opaque; 504e183ef75SPaolo Bonzini qemu_co_mutex_lock(&s->lock); 505e183ef75SPaolo Bonzini ret = vpc_write(bs, sector_num, buf, nb_sectors); 506e183ef75SPaolo Bonzini qemu_co_mutex_unlock(&s->lock); 507e183ef75SPaolo Bonzini return ret; 508e183ef75SPaolo Bonzini } 509e183ef75SPaolo Bonzini 5108b94ff85SPaolo Bonzini static coroutine_fn int vpc_co_flush(BlockDriverState *bs) 5114a411185SKevin Wolf { 5128b94ff85SPaolo Bonzini return bdrv_co_flush(bs->file); 5134a411185SKevin Wolf } 514019d6b8fSAnthony Liguori 515019d6b8fSAnthony Liguori /* 516019d6b8fSAnthony Liguori * Calculates the number of cylinders, heads and sectors per cylinder 517019d6b8fSAnthony Liguori * based on a given number of sectors. This is the algorithm described 518019d6b8fSAnthony Liguori * in the VHD specification. 519019d6b8fSAnthony Liguori * 520019d6b8fSAnthony Liguori * Note that the geometry doesn't always exactly match total_sectors but 521019d6b8fSAnthony Liguori * may round it down. 522019d6b8fSAnthony Liguori * 523019d6b8fSAnthony Liguori * Returns 0 on success, -EFBIG if the size is larger than 127 GB 524019d6b8fSAnthony Liguori */ 525019d6b8fSAnthony Liguori static int calculate_geometry(int64_t total_sectors, uint16_t* cyls, 526019d6b8fSAnthony Liguori uint8_t* heads, uint8_t* secs_per_cyl) 527019d6b8fSAnthony Liguori { 528019d6b8fSAnthony Liguori uint32_t cyls_times_heads; 529019d6b8fSAnthony Liguori 530019d6b8fSAnthony Liguori if (total_sectors > 65535 * 16 * 255) 531019d6b8fSAnthony Liguori return -EFBIG; 532019d6b8fSAnthony Liguori 533019d6b8fSAnthony Liguori if (total_sectors > 65535 * 16 * 63) { 534019d6b8fSAnthony Liguori *secs_per_cyl = 255; 535019d6b8fSAnthony Liguori *heads = 16; 536019d6b8fSAnthony Liguori cyls_times_heads = total_sectors / *secs_per_cyl; 537019d6b8fSAnthony Liguori } else { 538019d6b8fSAnthony Liguori *secs_per_cyl = 17; 539019d6b8fSAnthony Liguori cyls_times_heads = total_sectors / *secs_per_cyl; 540019d6b8fSAnthony Liguori *heads = (cyls_times_heads + 1023) / 1024; 541019d6b8fSAnthony Liguori 542019d6b8fSAnthony Liguori if (*heads < 4) 543019d6b8fSAnthony Liguori *heads = 4; 544019d6b8fSAnthony Liguori 545019d6b8fSAnthony Liguori if (cyls_times_heads >= (*heads * 1024) || *heads > 16) { 546019d6b8fSAnthony Liguori *secs_per_cyl = 31; 547019d6b8fSAnthony Liguori *heads = 16; 548019d6b8fSAnthony Liguori cyls_times_heads = total_sectors / *secs_per_cyl; 549019d6b8fSAnthony Liguori } 550019d6b8fSAnthony Liguori 551019d6b8fSAnthony Liguori if (cyls_times_heads >= (*heads * 1024)) { 552019d6b8fSAnthony Liguori *secs_per_cyl = 63; 553019d6b8fSAnthony Liguori *heads = 16; 554019d6b8fSAnthony Liguori cyls_times_heads = total_sectors / *secs_per_cyl; 555019d6b8fSAnthony Liguori } 556019d6b8fSAnthony Liguori } 557019d6b8fSAnthony Liguori 558dede4188SStefan Weil *cyls = cyls_times_heads / *heads; 559019d6b8fSAnthony Liguori 560019d6b8fSAnthony Liguori return 0; 561019d6b8fSAnthony Liguori } 562019d6b8fSAnthony Liguori 56324da78dbSCharles Arnold static int create_dynamic_disk(int fd, uint8_t *buf, int64_t total_sectors) 564019d6b8fSAnthony Liguori { 565019d6b8fSAnthony Liguori struct vhd_dyndisk_header* dyndisk_header = 566019d6b8fSAnthony Liguori (struct vhd_dyndisk_header*) buf; 567019d6b8fSAnthony Liguori size_t block_size, num_bat_entries; 56824da78dbSCharles Arnold int i; 569f0ff243aSBlue Swirl int ret = -EIO; 570019d6b8fSAnthony Liguori 571019d6b8fSAnthony Liguori // Write the footer (twice: at the beginning and at the end) 572019d6b8fSAnthony Liguori block_size = 0x200000; 573019d6b8fSAnthony Liguori num_bat_entries = (total_sectors + block_size / 512) / (block_size / 512); 574019d6b8fSAnthony Liguori 575f0ff243aSBlue Swirl if (write(fd, buf, HEADER_SIZE) != HEADER_SIZE) { 576f0ff243aSBlue Swirl goto fail; 577f0ff243aSBlue Swirl } 578019d6b8fSAnthony Liguori 579f0ff243aSBlue Swirl if (lseek(fd, 1536 + ((num_bat_entries * 4 + 511) & ~511), SEEK_SET) < 0) { 580f0ff243aSBlue Swirl goto fail; 581f0ff243aSBlue Swirl } 582f0ff243aSBlue Swirl if (write(fd, buf, HEADER_SIZE) != HEADER_SIZE) { 583f0ff243aSBlue Swirl goto fail; 584f0ff243aSBlue Swirl } 585019d6b8fSAnthony Liguori 586019d6b8fSAnthony Liguori // Write the initial BAT 587f0ff243aSBlue Swirl if (lseek(fd, 3 * 512, SEEK_SET) < 0) { 588f0ff243aSBlue Swirl goto fail; 589f0ff243aSBlue Swirl } 590019d6b8fSAnthony Liguori 591019d6b8fSAnthony Liguori memset(buf, 0xFF, 512); 592f0ff243aSBlue Swirl for (i = 0; i < (num_bat_entries * 4 + 511) / 512; i++) { 593f0ff243aSBlue Swirl if (write(fd, buf, 512) != 512) { 594f0ff243aSBlue Swirl goto fail; 595f0ff243aSBlue Swirl } 596f0ff243aSBlue Swirl } 597019d6b8fSAnthony Liguori 598019d6b8fSAnthony Liguori // Prepare the Dynamic Disk Header 599019d6b8fSAnthony Liguori memset(buf, 0, 1024); 600019d6b8fSAnthony Liguori 6015ec4d682SNathan Froyd memcpy(dyndisk_header->magic, "cxsparse", 8); 602019d6b8fSAnthony Liguori 60378439f6aSCharles Arnold /* 60478439f6aSCharles Arnold * Note: The spec is actually wrong here for data_offset, it says 60578439f6aSCharles Arnold * 0xFFFFFFFF, but MS tools expect all 64 bits to be set. 60678439f6aSCharles Arnold */ 60778439f6aSCharles Arnold dyndisk_header->data_offset = be64_to_cpu(0xFFFFFFFFFFFFFFFFULL); 608019d6b8fSAnthony Liguori dyndisk_header->table_offset = be64_to_cpu(3 * 512); 609019d6b8fSAnthony Liguori dyndisk_header->version = be32_to_cpu(0x00010000); 610019d6b8fSAnthony Liguori dyndisk_header->block_size = be32_to_cpu(block_size); 611019d6b8fSAnthony Liguori dyndisk_header->max_table_entries = be32_to_cpu(num_bat_entries); 612019d6b8fSAnthony Liguori 613019d6b8fSAnthony Liguori dyndisk_header->checksum = be32_to_cpu(vpc_checksum(buf, 1024)); 614019d6b8fSAnthony Liguori 615019d6b8fSAnthony Liguori // Write the header 616f0ff243aSBlue Swirl if (lseek(fd, 512, SEEK_SET) < 0) { 617f0ff243aSBlue Swirl goto fail; 618f0ff243aSBlue Swirl } 619019d6b8fSAnthony Liguori 620f0ff243aSBlue Swirl if (write(fd, buf, 1024) != 1024) { 621f0ff243aSBlue Swirl goto fail; 622f0ff243aSBlue Swirl } 623f0ff243aSBlue Swirl ret = 0; 624f0ff243aSBlue Swirl 625f0ff243aSBlue Swirl fail: 62624da78dbSCharles Arnold return ret; 62724da78dbSCharles Arnold } 62824da78dbSCharles Arnold 62924da78dbSCharles Arnold static int create_fixed_disk(int fd, uint8_t *buf, int64_t total_size) 63024da78dbSCharles Arnold { 63124da78dbSCharles Arnold int ret = -EIO; 63224da78dbSCharles Arnold 63324da78dbSCharles Arnold /* Add footer to total size */ 63424da78dbSCharles Arnold total_size += 512; 63524da78dbSCharles Arnold if (ftruncate(fd, total_size) != 0) { 63624da78dbSCharles Arnold ret = -errno; 63724da78dbSCharles Arnold goto fail; 63824da78dbSCharles Arnold } 63924da78dbSCharles Arnold if (lseek(fd, -512, SEEK_END) < 0) { 64024da78dbSCharles Arnold goto fail; 64124da78dbSCharles Arnold } 64224da78dbSCharles Arnold if (write(fd, buf, HEADER_SIZE) != HEADER_SIZE) { 64324da78dbSCharles Arnold goto fail; 64424da78dbSCharles Arnold } 64524da78dbSCharles Arnold 64624da78dbSCharles Arnold ret = 0; 64724da78dbSCharles Arnold 64824da78dbSCharles Arnold fail: 64924da78dbSCharles Arnold return ret; 65024da78dbSCharles Arnold } 65124da78dbSCharles Arnold 65224da78dbSCharles Arnold static int vpc_create(const char *filename, QEMUOptionParameter *options) 65324da78dbSCharles Arnold { 65424da78dbSCharles Arnold uint8_t buf[1024]; 65524da78dbSCharles Arnold struct vhd_footer *footer = (struct vhd_footer *) buf; 65624da78dbSCharles Arnold QEMUOptionParameter *disk_type_param; 65724da78dbSCharles Arnold int fd, i; 65824da78dbSCharles Arnold uint16_t cyls = 0; 65924da78dbSCharles Arnold uint8_t heads = 0; 66024da78dbSCharles Arnold uint8_t secs_per_cyl = 0; 66124da78dbSCharles Arnold int64_t total_sectors; 66224da78dbSCharles Arnold int64_t total_size; 66324da78dbSCharles Arnold int disk_type; 66424da78dbSCharles Arnold int ret = -EIO; 66524da78dbSCharles Arnold 66624da78dbSCharles Arnold /* Read out options */ 66724da78dbSCharles Arnold total_size = get_option_parameter(options, BLOCK_OPT_SIZE)->value.n; 66824da78dbSCharles Arnold 66924da78dbSCharles Arnold disk_type_param = get_option_parameter(options, BLOCK_OPT_SUBFMT); 67024da78dbSCharles Arnold if (disk_type_param && disk_type_param->value.s) { 67124da78dbSCharles Arnold if (!strcmp(disk_type_param->value.s, "dynamic")) { 67224da78dbSCharles Arnold disk_type = VHD_DYNAMIC; 67324da78dbSCharles Arnold } else if (!strcmp(disk_type_param->value.s, "fixed")) { 67424da78dbSCharles Arnold disk_type = VHD_FIXED; 67524da78dbSCharles Arnold } else { 67624da78dbSCharles Arnold return -EINVAL; 67724da78dbSCharles Arnold } 67824da78dbSCharles Arnold } else { 67924da78dbSCharles Arnold disk_type = VHD_DYNAMIC; 68024da78dbSCharles Arnold } 68124da78dbSCharles Arnold 68224da78dbSCharles Arnold /* Create the file */ 68324da78dbSCharles Arnold fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0644); 68424da78dbSCharles Arnold if (fd < 0) { 68524da78dbSCharles Arnold return -EIO; 68624da78dbSCharles Arnold } 68724da78dbSCharles Arnold 688*ecd880d9SKevin Wolf /* 689*ecd880d9SKevin Wolf * Calculate matching total_size and geometry. Increase the number of 690*ecd880d9SKevin Wolf * sectors requested until we get enough (or fail). This ensures that 691*ecd880d9SKevin Wolf * qemu-img convert doesn't truncate images, but rather rounds up. 692*ecd880d9SKevin Wolf */ 69324da78dbSCharles Arnold total_sectors = total_size / BDRV_SECTOR_SIZE; 694*ecd880d9SKevin Wolf for (i = 0; total_sectors > (int64_t)cyls * heads * secs_per_cyl; i++) { 695*ecd880d9SKevin Wolf if (calculate_geometry(total_sectors + i, &cyls, &heads, 696*ecd880d9SKevin Wolf &secs_per_cyl)) 697*ecd880d9SKevin Wolf { 69824da78dbSCharles Arnold ret = -EFBIG; 69924da78dbSCharles Arnold goto fail; 70024da78dbSCharles Arnold } 70124da78dbSCharles Arnold } 702*ecd880d9SKevin Wolf 70324da78dbSCharles Arnold total_sectors = (int64_t) cyls * heads * secs_per_cyl; 70424da78dbSCharles Arnold 70524da78dbSCharles Arnold /* Prepare the Hard Disk Footer */ 70624da78dbSCharles Arnold memset(buf, 0, 1024); 70724da78dbSCharles Arnold 70824da78dbSCharles Arnold memcpy(footer->creator, "conectix", 8); 70924da78dbSCharles Arnold /* TODO Check if "qemu" creator_app is ok for VPC */ 71024da78dbSCharles Arnold memcpy(footer->creator_app, "qemu", 4); 71124da78dbSCharles Arnold memcpy(footer->creator_os, "Wi2k", 4); 71224da78dbSCharles Arnold 71324da78dbSCharles Arnold footer->features = be32_to_cpu(0x02); 71424da78dbSCharles Arnold footer->version = be32_to_cpu(0x00010000); 71524da78dbSCharles Arnold if (disk_type == VHD_DYNAMIC) { 71624da78dbSCharles Arnold footer->data_offset = be64_to_cpu(HEADER_SIZE); 71724da78dbSCharles Arnold } else { 71824da78dbSCharles Arnold footer->data_offset = be64_to_cpu(0xFFFFFFFFFFFFFFFFULL); 71924da78dbSCharles Arnold } 72024da78dbSCharles Arnold footer->timestamp = be32_to_cpu(time(NULL) - VHD_TIMESTAMP_BASE); 72124da78dbSCharles Arnold 72224da78dbSCharles Arnold /* Version of Virtual PC 2007 */ 72324da78dbSCharles Arnold footer->major = be16_to_cpu(0x0005); 72424da78dbSCharles Arnold footer->minor = be16_to_cpu(0x0003); 72524da78dbSCharles Arnold if (disk_type == VHD_DYNAMIC) { 72624da78dbSCharles Arnold footer->orig_size = be64_to_cpu(total_sectors * 512); 72724da78dbSCharles Arnold footer->size = be64_to_cpu(total_sectors * 512); 72824da78dbSCharles Arnold } else { 72924da78dbSCharles Arnold footer->orig_size = be64_to_cpu(total_size); 73024da78dbSCharles Arnold footer->size = be64_to_cpu(total_size); 73124da78dbSCharles Arnold } 73224da78dbSCharles Arnold footer->cyls = be16_to_cpu(cyls); 73324da78dbSCharles Arnold footer->heads = heads; 73424da78dbSCharles Arnold footer->secs_per_cyl = secs_per_cyl; 73524da78dbSCharles Arnold 73624da78dbSCharles Arnold footer->type = be32_to_cpu(disk_type); 73724da78dbSCharles Arnold 73824da78dbSCharles Arnold /* TODO uuid is missing */ 73924da78dbSCharles Arnold 74024da78dbSCharles Arnold footer->checksum = be32_to_cpu(vpc_checksum(buf, HEADER_SIZE)); 74124da78dbSCharles Arnold 74224da78dbSCharles Arnold if (disk_type == VHD_DYNAMIC) { 74324da78dbSCharles Arnold ret = create_dynamic_disk(fd, buf, total_sectors); 74424da78dbSCharles Arnold } else { 74524da78dbSCharles Arnold ret = create_fixed_disk(fd, buf, total_size); 74624da78dbSCharles Arnold } 74724da78dbSCharles Arnold 74824da78dbSCharles Arnold fail: 749019d6b8fSAnthony Liguori close(fd); 750f0ff243aSBlue Swirl return ret; 751019d6b8fSAnthony Liguori } 752019d6b8fSAnthony Liguori 753019d6b8fSAnthony Liguori static void vpc_close(BlockDriverState *bs) 754019d6b8fSAnthony Liguori { 755019d6b8fSAnthony Liguori BDRVVPCState *s = bs->opaque; 7567267c094SAnthony Liguori g_free(s->pagetable); 757019d6b8fSAnthony Liguori #ifdef CACHE 7587267c094SAnthony Liguori g_free(s->pageentry_u8); 759019d6b8fSAnthony Liguori #endif 760612ff3d8SKevin Wolf 761612ff3d8SKevin Wolf migrate_del_blocker(s->migration_blocker); 762612ff3d8SKevin Wolf error_free(s->migration_blocker); 763019d6b8fSAnthony Liguori } 764019d6b8fSAnthony Liguori 7650e7e1989SKevin Wolf static QEMUOptionParameter vpc_create_options[] = { 766db08adf5SKevin Wolf { 767db08adf5SKevin Wolf .name = BLOCK_OPT_SIZE, 768db08adf5SKevin Wolf .type = OPT_SIZE, 769db08adf5SKevin Wolf .help = "Virtual disk size" 770db08adf5SKevin Wolf }, 77124da78dbSCharles Arnold { 77224da78dbSCharles Arnold .name = BLOCK_OPT_SUBFMT, 77324da78dbSCharles Arnold .type = OPT_STRING, 77424da78dbSCharles Arnold .help = 77524da78dbSCharles Arnold "Type of virtual hard disk format. Supported formats are " 77624da78dbSCharles Arnold "{dynamic (default) | fixed} " 77724da78dbSCharles Arnold }, 7780e7e1989SKevin Wolf { NULL } 7790e7e1989SKevin Wolf }; 7800e7e1989SKevin Wolf 781019d6b8fSAnthony Liguori static BlockDriver bdrv_vpc = { 782019d6b8fSAnthony Liguori .format_name = "vpc", 783019d6b8fSAnthony Liguori .instance_size = sizeof(BDRVVPCState), 784c68b89acSKevin Wolf 785019d6b8fSAnthony Liguori .bdrv_probe = vpc_probe, 786019d6b8fSAnthony Liguori .bdrv_open = vpc_open, 787019d6b8fSAnthony Liguori .bdrv_close = vpc_close, 788019d6b8fSAnthony Liguori .bdrv_create = vpc_create, 7890e7e1989SKevin Wolf 790c68b89acSKevin Wolf .bdrv_read = vpc_co_read, 791c68b89acSKevin Wolf .bdrv_write = vpc_co_write, 792c68b89acSKevin Wolf .bdrv_co_flush_to_disk = vpc_co_flush, 793c68b89acSKevin Wolf 7940e7e1989SKevin Wolf .create_options = vpc_create_options, 795019d6b8fSAnthony Liguori }; 796019d6b8fSAnthony Liguori 797019d6b8fSAnthony Liguori static void bdrv_vpc_init(void) 798019d6b8fSAnthony Liguori { 799019d6b8fSAnthony Liguori bdrv_register(&bdrv_vpc); 800019d6b8fSAnthony Liguori } 801019d6b8fSAnthony Liguori 802019d6b8fSAnthony Liguori block_init(bdrv_vpc_init); 803