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" 29*1fe1fa51SCharles Arnold #if defined(CONFIG_UUID) 30*1fe1fa51SCharles Arnold #include <uuid/uuid.h> 31*1fe1fa51SCharles Arnold #endif 32019d6b8fSAnthony Liguori 33019d6b8fSAnthony Liguori /**************************************************************/ 34019d6b8fSAnthony Liguori 35019d6b8fSAnthony Liguori #define HEADER_SIZE 512 36019d6b8fSAnthony Liguori 37019d6b8fSAnthony Liguori //#define CACHE 38019d6b8fSAnthony Liguori 39019d6b8fSAnthony Liguori enum vhd_type { 40019d6b8fSAnthony Liguori VHD_FIXED = 2, 41019d6b8fSAnthony Liguori VHD_DYNAMIC = 3, 42019d6b8fSAnthony Liguori VHD_DIFFERENCING = 4, 43019d6b8fSAnthony Liguori }; 44019d6b8fSAnthony Liguori 45019d6b8fSAnthony Liguori // Seconds since Jan 1, 2000 0:00:00 (UTC) 46019d6b8fSAnthony Liguori #define VHD_TIMESTAMP_BASE 946684800 47019d6b8fSAnthony Liguori 48019d6b8fSAnthony Liguori // always big-endian 49019d6b8fSAnthony Liguori struct vhd_footer { 50019d6b8fSAnthony Liguori char creator[8]; // "conectix" 51019d6b8fSAnthony Liguori uint32_t features; 52019d6b8fSAnthony Liguori uint32_t version; 53019d6b8fSAnthony Liguori 54019d6b8fSAnthony Liguori // Offset of next header structure, 0xFFFFFFFF if none 55019d6b8fSAnthony Liguori uint64_t data_offset; 56019d6b8fSAnthony Liguori 57019d6b8fSAnthony Liguori // Seconds since Jan 1, 2000 0:00:00 (UTC) 58019d6b8fSAnthony Liguori uint32_t timestamp; 59019d6b8fSAnthony Liguori 60019d6b8fSAnthony Liguori char creator_app[4]; // "vpc " 61019d6b8fSAnthony Liguori uint16_t major; 62019d6b8fSAnthony Liguori uint16_t minor; 63019d6b8fSAnthony Liguori char creator_os[4]; // "Wi2k" 64019d6b8fSAnthony Liguori 65019d6b8fSAnthony Liguori uint64_t orig_size; 66019d6b8fSAnthony Liguori uint64_t size; 67019d6b8fSAnthony Liguori 68019d6b8fSAnthony Liguori uint16_t cyls; 69019d6b8fSAnthony Liguori uint8_t heads; 70019d6b8fSAnthony Liguori uint8_t secs_per_cyl; 71019d6b8fSAnthony Liguori 72019d6b8fSAnthony Liguori uint32_t type; 73019d6b8fSAnthony Liguori 74019d6b8fSAnthony Liguori // Checksum of the Hard Disk Footer ("one's complement of the sum of all 75019d6b8fSAnthony Liguori // the bytes in the footer without the checksum field") 76019d6b8fSAnthony Liguori uint32_t checksum; 77019d6b8fSAnthony Liguori 78019d6b8fSAnthony Liguori // UUID used to identify a parent hard disk (backing file) 79019d6b8fSAnthony Liguori uint8_t uuid[16]; 80019d6b8fSAnthony Liguori 81019d6b8fSAnthony Liguori uint8_t in_saved_state; 82019d6b8fSAnthony Liguori }; 83019d6b8fSAnthony Liguori 84019d6b8fSAnthony Liguori struct vhd_dyndisk_header { 85019d6b8fSAnthony Liguori char magic[8]; // "cxsparse" 86019d6b8fSAnthony Liguori 87019d6b8fSAnthony Liguori // Offset of next header structure, 0xFFFFFFFF if none 88019d6b8fSAnthony Liguori uint64_t data_offset; 89019d6b8fSAnthony Liguori 90019d6b8fSAnthony Liguori // Offset of the Block Allocation Table (BAT) 91019d6b8fSAnthony Liguori uint64_t table_offset; 92019d6b8fSAnthony Liguori 93019d6b8fSAnthony Liguori uint32_t version; 94019d6b8fSAnthony Liguori uint32_t max_table_entries; // 32bit/entry 95019d6b8fSAnthony Liguori 96019d6b8fSAnthony Liguori // 2 MB by default, must be a power of two 97019d6b8fSAnthony Liguori uint32_t block_size; 98019d6b8fSAnthony Liguori 99019d6b8fSAnthony Liguori uint32_t checksum; 100019d6b8fSAnthony Liguori uint8_t parent_uuid[16]; 101019d6b8fSAnthony Liguori uint32_t parent_timestamp; 102019d6b8fSAnthony Liguori uint32_t reserved; 103019d6b8fSAnthony Liguori 104019d6b8fSAnthony Liguori // Backing file name (in UTF-16) 105019d6b8fSAnthony Liguori uint8_t parent_name[512]; 106019d6b8fSAnthony Liguori 107019d6b8fSAnthony Liguori struct { 108019d6b8fSAnthony Liguori uint32_t platform; 109019d6b8fSAnthony Liguori uint32_t data_space; 110019d6b8fSAnthony Liguori uint32_t data_length; 111019d6b8fSAnthony Liguori uint32_t reserved; 112019d6b8fSAnthony Liguori uint64_t data_offset; 113019d6b8fSAnthony Liguori } parent_locator[8]; 114019d6b8fSAnthony Liguori }; 115019d6b8fSAnthony Liguori 116019d6b8fSAnthony Liguori typedef struct BDRVVPCState { 117848c66e8SPaolo Bonzini CoMutex lock; 118019d6b8fSAnthony Liguori uint8_t footer_buf[HEADER_SIZE]; 119019d6b8fSAnthony Liguori uint64_t free_data_block_offset; 120019d6b8fSAnthony Liguori int max_table_entries; 121019d6b8fSAnthony Liguori uint32_t *pagetable; 122019d6b8fSAnthony Liguori uint64_t bat_offset; 123019d6b8fSAnthony Liguori uint64_t last_bitmap_offset; 124019d6b8fSAnthony Liguori 125019d6b8fSAnthony Liguori uint32_t block_size; 126019d6b8fSAnthony Liguori uint32_t bitmap_size; 127019d6b8fSAnthony Liguori 128019d6b8fSAnthony Liguori #ifdef CACHE 129019d6b8fSAnthony Liguori uint8_t *pageentry_u8; 130019d6b8fSAnthony Liguori uint32_t *pageentry_u32; 131019d6b8fSAnthony Liguori uint16_t *pageentry_u16; 132019d6b8fSAnthony Liguori 133019d6b8fSAnthony Liguori uint64_t last_bitmap; 134019d6b8fSAnthony Liguori #endif 135612ff3d8SKevin Wolf 136612ff3d8SKevin Wolf Error *migration_blocker; 137019d6b8fSAnthony Liguori } BDRVVPCState; 138019d6b8fSAnthony Liguori 139019d6b8fSAnthony Liguori static uint32_t vpc_checksum(uint8_t* buf, size_t size) 140019d6b8fSAnthony Liguori { 141019d6b8fSAnthony Liguori uint32_t res = 0; 142019d6b8fSAnthony Liguori int i; 143019d6b8fSAnthony Liguori 144019d6b8fSAnthony Liguori for (i = 0; i < size; i++) 145019d6b8fSAnthony Liguori res += buf[i]; 146019d6b8fSAnthony Liguori 147019d6b8fSAnthony Liguori return ~res; 148019d6b8fSAnthony Liguori } 149019d6b8fSAnthony Liguori 150019d6b8fSAnthony Liguori 151019d6b8fSAnthony Liguori static int vpc_probe(const uint8_t *buf, int buf_size, const char *filename) 152019d6b8fSAnthony Liguori { 153019d6b8fSAnthony Liguori if (buf_size >= 8 && !strncmp((char *)buf, "conectix", 8)) 154019d6b8fSAnthony Liguori return 100; 155019d6b8fSAnthony Liguori return 0; 156019d6b8fSAnthony Liguori } 157019d6b8fSAnthony Liguori 15866f82ceeSKevin Wolf static int vpc_open(BlockDriverState *bs, int flags) 159019d6b8fSAnthony Liguori { 160019d6b8fSAnthony Liguori BDRVVPCState *s = bs->opaque; 16166f82ceeSKevin Wolf int i; 162019d6b8fSAnthony Liguori struct vhd_footer* footer; 163019d6b8fSAnthony Liguori struct vhd_dyndisk_header* dyndisk_header; 164019d6b8fSAnthony Liguori uint8_t buf[HEADER_SIZE]; 165019d6b8fSAnthony Liguori uint32_t checksum; 166efc8243dSSerge E. Hallyn int err = -1; 16724da78dbSCharles Arnold int disk_type = VHD_DYNAMIC; 168019d6b8fSAnthony Liguori 16966f82ceeSKevin Wolf if (bdrv_pread(bs->file, 0, s->footer_buf, HEADER_SIZE) != HEADER_SIZE) 170019d6b8fSAnthony Liguori goto fail; 171019d6b8fSAnthony Liguori 172019d6b8fSAnthony Liguori footer = (struct vhd_footer*) s->footer_buf; 17324da78dbSCharles Arnold if (strncmp(footer->creator, "conectix", 8)) { 17424da78dbSCharles Arnold int64_t offset = bdrv_getlength(bs->file); 17524da78dbSCharles Arnold if (offset < HEADER_SIZE) { 176019d6b8fSAnthony Liguori goto fail; 17724da78dbSCharles Arnold } 17824da78dbSCharles Arnold /* If a fixed disk, the footer is found only at the end of the file */ 17924da78dbSCharles Arnold if (bdrv_pread(bs->file, offset-HEADER_SIZE, s->footer_buf, HEADER_SIZE) 18024da78dbSCharles Arnold != HEADER_SIZE) { 18124da78dbSCharles Arnold goto fail; 18224da78dbSCharles Arnold } 18324da78dbSCharles Arnold if (strncmp(footer->creator, "conectix", 8)) { 18424da78dbSCharles Arnold goto fail; 18524da78dbSCharles Arnold } 18624da78dbSCharles Arnold disk_type = VHD_FIXED; 18724da78dbSCharles Arnold } 188019d6b8fSAnthony Liguori 189019d6b8fSAnthony Liguori checksum = be32_to_cpu(footer->checksum); 190019d6b8fSAnthony Liguori footer->checksum = 0; 191019d6b8fSAnthony Liguori if (vpc_checksum(s->footer_buf, HEADER_SIZE) != checksum) 192019d6b8fSAnthony Liguori fprintf(stderr, "block-vpc: The header checksum of '%s' is " 19366f82ceeSKevin Wolf "incorrect.\n", bs->filename); 194019d6b8fSAnthony Liguori 195c088b691SZhang Shengju /* Write 'checksum' back to footer, or else will leave it with zero. */ 196c088b691SZhang Shengju footer->checksum = be32_to_cpu(checksum); 197c088b691SZhang Shengju 198019d6b8fSAnthony Liguori // The visible size of a image in Virtual PC depends on the geometry 199019d6b8fSAnthony Liguori // rather than on the size stored in the footer (the size in the footer 200019d6b8fSAnthony Liguori // is too large usually) 201019d6b8fSAnthony Liguori bs->total_sectors = (int64_t) 202019d6b8fSAnthony Liguori be16_to_cpu(footer->cyls) * footer->heads * footer->secs_per_cyl; 203019d6b8fSAnthony Liguori 204efc8243dSSerge E. Hallyn if (bs->total_sectors >= 65535 * 16 * 255) { 205efc8243dSSerge E. Hallyn err = -EFBIG; 206efc8243dSSerge E. Hallyn goto fail; 207efc8243dSSerge E. Hallyn } 208efc8243dSSerge E. Hallyn 20924da78dbSCharles Arnold if (disk_type == VHD_DYNAMIC) { 21024da78dbSCharles Arnold if (bdrv_pread(bs->file, be64_to_cpu(footer->data_offset), buf, 21124da78dbSCharles Arnold HEADER_SIZE) != HEADER_SIZE) { 212019d6b8fSAnthony Liguori goto fail; 21324da78dbSCharles Arnold } 214019d6b8fSAnthony Liguori 215019d6b8fSAnthony Liguori dyndisk_header = (struct vhd_dyndisk_header *) buf; 216019d6b8fSAnthony Liguori 21724da78dbSCharles Arnold if (strncmp(dyndisk_header->magic, "cxsparse", 8)) { 218019d6b8fSAnthony Liguori goto fail; 21924da78dbSCharles Arnold } 220019d6b8fSAnthony Liguori 221019d6b8fSAnthony Liguori s->block_size = be32_to_cpu(dyndisk_header->block_size); 222019d6b8fSAnthony Liguori s->bitmap_size = ((s->block_size / (8 * 512)) + 511) & ~511; 223019d6b8fSAnthony Liguori 224019d6b8fSAnthony Liguori s->max_table_entries = be32_to_cpu(dyndisk_header->max_table_entries); 2257267c094SAnthony Liguori s->pagetable = g_malloc(s->max_table_entries * 4); 226019d6b8fSAnthony Liguori 227019d6b8fSAnthony Liguori s->bat_offset = be64_to_cpu(dyndisk_header->table_offset); 22866f82ceeSKevin Wolf if (bdrv_pread(bs->file, s->bat_offset, s->pagetable, 22924da78dbSCharles Arnold s->max_table_entries * 4) != s->max_table_entries * 4) { 230019d6b8fSAnthony Liguori goto fail; 23124da78dbSCharles Arnold } 232019d6b8fSAnthony Liguori 233019d6b8fSAnthony Liguori s->free_data_block_offset = 234019d6b8fSAnthony Liguori (s->bat_offset + (s->max_table_entries * 4) + 511) & ~511; 235019d6b8fSAnthony Liguori 236019d6b8fSAnthony Liguori for (i = 0; i < s->max_table_entries; i++) { 237019d6b8fSAnthony Liguori be32_to_cpus(&s->pagetable[i]); 238019d6b8fSAnthony Liguori if (s->pagetable[i] != 0xFFFFFFFF) { 239019d6b8fSAnthony Liguori int64_t next = (512 * (int64_t) s->pagetable[i]) + 240019d6b8fSAnthony Liguori s->bitmap_size + s->block_size; 241019d6b8fSAnthony Liguori 24224da78dbSCharles Arnold if (next > s->free_data_block_offset) { 243019d6b8fSAnthony Liguori s->free_data_block_offset = next; 244019d6b8fSAnthony Liguori } 245019d6b8fSAnthony Liguori } 24624da78dbSCharles Arnold } 247019d6b8fSAnthony Liguori 248019d6b8fSAnthony Liguori s->last_bitmap_offset = (int64_t) -1; 249019d6b8fSAnthony Liguori 250019d6b8fSAnthony Liguori #ifdef CACHE 2517267c094SAnthony Liguori s->pageentry_u8 = g_malloc(512); 252019d6b8fSAnthony Liguori s->pageentry_u32 = s->pageentry_u8; 253019d6b8fSAnthony Liguori s->pageentry_u16 = s->pageentry_u8; 254019d6b8fSAnthony Liguori s->last_pagetable = -1; 255019d6b8fSAnthony Liguori #endif 25624da78dbSCharles Arnold } 257019d6b8fSAnthony Liguori 258848c66e8SPaolo Bonzini qemu_co_mutex_init(&s->lock); 259612ff3d8SKevin Wolf 260612ff3d8SKevin Wolf /* Disable migration when VHD images are used */ 261612ff3d8SKevin Wolf error_set(&s->migration_blocker, 262612ff3d8SKevin Wolf QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED, 263612ff3d8SKevin Wolf "vpc", bs->device_name, "live migration"); 264612ff3d8SKevin Wolf migrate_add_blocker(s->migration_blocker); 265612ff3d8SKevin Wolf 266019d6b8fSAnthony Liguori return 0; 267019d6b8fSAnthony Liguori fail: 268efc8243dSSerge E. Hallyn return err; 269019d6b8fSAnthony Liguori } 270019d6b8fSAnthony Liguori 2713fe4b700SJeff Cody static int vpc_reopen_prepare(BDRVReopenState *state, 2723fe4b700SJeff Cody BlockReopenQueue *queue, Error **errp) 2733fe4b700SJeff Cody { 2743fe4b700SJeff Cody return 0; 2753fe4b700SJeff Cody } 2763fe4b700SJeff Cody 277019d6b8fSAnthony Liguori /* 278019d6b8fSAnthony Liguori * Returns the absolute byte offset of the given sector in the image file. 279019d6b8fSAnthony Liguori * If the sector is not allocated, -1 is returned instead. 280019d6b8fSAnthony Liguori * 281019d6b8fSAnthony Liguori * The parameter write must be 1 if the offset will be used for a write 282019d6b8fSAnthony Liguori * operation (the block bitmaps is updated then), 0 otherwise. 283019d6b8fSAnthony Liguori */ 284019d6b8fSAnthony Liguori static inline int64_t get_sector_offset(BlockDriverState *bs, 285019d6b8fSAnthony Liguori int64_t sector_num, int write) 286019d6b8fSAnthony Liguori { 287019d6b8fSAnthony Liguori BDRVVPCState *s = bs->opaque; 288019d6b8fSAnthony Liguori uint64_t offset = sector_num * 512; 289019d6b8fSAnthony Liguori uint64_t bitmap_offset, block_offset; 290019d6b8fSAnthony Liguori uint32_t pagetable_index, pageentry_index; 291019d6b8fSAnthony Liguori 292019d6b8fSAnthony Liguori pagetable_index = offset / s->block_size; 293019d6b8fSAnthony Liguori pageentry_index = (offset % s->block_size) / 512; 294019d6b8fSAnthony Liguori 295019d6b8fSAnthony Liguori if (pagetable_index >= s->max_table_entries || s->pagetable[pagetable_index] == 0xffffffff) 296019d6b8fSAnthony Liguori return -1; // not allocated 297019d6b8fSAnthony Liguori 298019d6b8fSAnthony Liguori bitmap_offset = 512 * (uint64_t) s->pagetable[pagetable_index]; 299019d6b8fSAnthony Liguori block_offset = bitmap_offset + s->bitmap_size + (512 * pageentry_index); 300019d6b8fSAnthony Liguori 301019d6b8fSAnthony Liguori // We must ensure that we don't write to any sectors which are marked as 302019d6b8fSAnthony Liguori // unused in the bitmap. We get away with setting all bits in the block 303019d6b8fSAnthony Liguori // bitmap each time we write to a new block. This might cause Virtual PC to 304019d6b8fSAnthony Liguori // miss sparse read optimization, but it's not a problem in terms of 305019d6b8fSAnthony Liguori // correctness. 306019d6b8fSAnthony Liguori if (write && (s->last_bitmap_offset != bitmap_offset)) { 307019d6b8fSAnthony Liguori uint8_t bitmap[s->bitmap_size]; 308019d6b8fSAnthony Liguori 309019d6b8fSAnthony Liguori s->last_bitmap_offset = bitmap_offset; 310019d6b8fSAnthony Liguori memset(bitmap, 0xff, s->bitmap_size); 311078a458eSKevin Wolf bdrv_pwrite_sync(bs->file, bitmap_offset, bitmap, s->bitmap_size); 312019d6b8fSAnthony Liguori } 313019d6b8fSAnthony Liguori 314019d6b8fSAnthony Liguori // printf("sector: %" PRIx64 ", index: %x, offset: %x, bioff: %" PRIx64 ", bloff: %" PRIx64 "\n", 315019d6b8fSAnthony Liguori // sector_num, pagetable_index, pageentry_index, 316019d6b8fSAnthony Liguori // bitmap_offset, block_offset); 317019d6b8fSAnthony Liguori 318019d6b8fSAnthony Liguori // disabled by reason 319019d6b8fSAnthony Liguori #if 0 320019d6b8fSAnthony Liguori #ifdef CACHE 321019d6b8fSAnthony Liguori if (bitmap_offset != s->last_bitmap) 322019d6b8fSAnthony Liguori { 323019d6b8fSAnthony Liguori lseek(s->fd, bitmap_offset, SEEK_SET); 324019d6b8fSAnthony Liguori 325019d6b8fSAnthony Liguori s->last_bitmap = bitmap_offset; 326019d6b8fSAnthony Liguori 327019d6b8fSAnthony Liguori // Scary! Bitmap is stored as big endian 32bit entries, 328019d6b8fSAnthony Liguori // while we used to look it up byte by byte 329019d6b8fSAnthony Liguori read(s->fd, s->pageentry_u8, 512); 330019d6b8fSAnthony Liguori for (i = 0; i < 128; i++) 331019d6b8fSAnthony Liguori be32_to_cpus(&s->pageentry_u32[i]); 332019d6b8fSAnthony Liguori } 333019d6b8fSAnthony Liguori 334019d6b8fSAnthony Liguori if ((s->pageentry_u8[pageentry_index / 8] >> (pageentry_index % 8)) & 1) 335019d6b8fSAnthony Liguori return -1; 336019d6b8fSAnthony Liguori #else 337019d6b8fSAnthony Liguori lseek(s->fd, bitmap_offset + (pageentry_index / 8), SEEK_SET); 338019d6b8fSAnthony Liguori 339019d6b8fSAnthony Liguori read(s->fd, &bitmap_entry, 1); 340019d6b8fSAnthony Liguori 341019d6b8fSAnthony Liguori if ((bitmap_entry >> (pageentry_index % 8)) & 1) 342019d6b8fSAnthony Liguori return -1; // not allocated 343019d6b8fSAnthony Liguori #endif 344019d6b8fSAnthony Liguori #endif 345019d6b8fSAnthony Liguori 346019d6b8fSAnthony Liguori return block_offset; 347019d6b8fSAnthony Liguori } 348019d6b8fSAnthony Liguori 349019d6b8fSAnthony Liguori /* 350019d6b8fSAnthony Liguori * Writes the footer to the end of the image file. This is needed when the 351019d6b8fSAnthony Liguori * file grows as it overwrites the old footer 352019d6b8fSAnthony Liguori * 353019d6b8fSAnthony Liguori * Returns 0 on success and < 0 on error 354019d6b8fSAnthony Liguori */ 355019d6b8fSAnthony Liguori static int rewrite_footer(BlockDriverState* bs) 356019d6b8fSAnthony Liguori { 357019d6b8fSAnthony Liguori int ret; 358019d6b8fSAnthony Liguori BDRVVPCState *s = bs->opaque; 359019d6b8fSAnthony Liguori int64_t offset = s->free_data_block_offset; 360019d6b8fSAnthony Liguori 361078a458eSKevin Wolf ret = bdrv_pwrite_sync(bs->file, offset, s->footer_buf, HEADER_SIZE); 362019d6b8fSAnthony Liguori if (ret < 0) 363019d6b8fSAnthony Liguori return ret; 364019d6b8fSAnthony Liguori 365019d6b8fSAnthony Liguori return 0; 366019d6b8fSAnthony Liguori } 367019d6b8fSAnthony Liguori 368019d6b8fSAnthony Liguori /* 369019d6b8fSAnthony Liguori * Allocates a new block. This involves writing a new footer and updating 370019d6b8fSAnthony Liguori * the Block Allocation Table to use the space at the old end of the image 371019d6b8fSAnthony Liguori * file (overwriting the old footer) 372019d6b8fSAnthony Liguori * 373019d6b8fSAnthony Liguori * Returns the sectors' offset in the image file on success and < 0 on error 374019d6b8fSAnthony Liguori */ 375019d6b8fSAnthony Liguori static int64_t alloc_block(BlockDriverState* bs, int64_t sector_num) 376019d6b8fSAnthony Liguori { 377019d6b8fSAnthony Liguori BDRVVPCState *s = bs->opaque; 378019d6b8fSAnthony Liguori int64_t bat_offset; 379019d6b8fSAnthony Liguori uint32_t index, bat_value; 380019d6b8fSAnthony Liguori int ret; 381019d6b8fSAnthony Liguori uint8_t bitmap[s->bitmap_size]; 382019d6b8fSAnthony Liguori 383019d6b8fSAnthony Liguori // Check if sector_num is valid 384019d6b8fSAnthony Liguori if ((sector_num < 0) || (sector_num > bs->total_sectors)) 385019d6b8fSAnthony Liguori return -1; 386019d6b8fSAnthony Liguori 387019d6b8fSAnthony Liguori // Write entry into in-memory BAT 388019d6b8fSAnthony Liguori index = (sector_num * 512) / s->block_size; 389019d6b8fSAnthony Liguori if (s->pagetable[index] != 0xFFFFFFFF) 390019d6b8fSAnthony Liguori return -1; 391019d6b8fSAnthony Liguori 392019d6b8fSAnthony Liguori s->pagetable[index] = s->free_data_block_offset / 512; 393019d6b8fSAnthony Liguori 394019d6b8fSAnthony Liguori // Initialize the block's bitmap 395019d6b8fSAnthony Liguori memset(bitmap, 0xff, s->bitmap_size); 3965bb1cbacSKevin Wolf ret = bdrv_pwrite_sync(bs->file, s->free_data_block_offset, bitmap, 397078a458eSKevin Wolf s->bitmap_size); 3985bb1cbacSKevin Wolf if (ret < 0) { 3995bb1cbacSKevin Wolf return ret; 4005bb1cbacSKevin Wolf } 401019d6b8fSAnthony Liguori 402019d6b8fSAnthony Liguori // Write new footer (the old one will be overwritten) 403019d6b8fSAnthony Liguori s->free_data_block_offset += s->block_size + s->bitmap_size; 404019d6b8fSAnthony Liguori ret = rewrite_footer(bs); 405019d6b8fSAnthony Liguori if (ret < 0) 406019d6b8fSAnthony Liguori goto fail; 407019d6b8fSAnthony Liguori 408019d6b8fSAnthony Liguori // Write BAT entry to disk 409019d6b8fSAnthony Liguori bat_offset = s->bat_offset + (4 * index); 410019d6b8fSAnthony Liguori bat_value = be32_to_cpu(s->pagetable[index]); 411078a458eSKevin Wolf ret = bdrv_pwrite_sync(bs->file, bat_offset, &bat_value, 4); 412019d6b8fSAnthony Liguori if (ret < 0) 413019d6b8fSAnthony Liguori goto fail; 414019d6b8fSAnthony Liguori 415019d6b8fSAnthony Liguori return get_sector_offset(bs, sector_num, 0); 416019d6b8fSAnthony Liguori 417019d6b8fSAnthony Liguori fail: 418019d6b8fSAnthony Liguori s->free_data_block_offset -= (s->block_size + s->bitmap_size); 419019d6b8fSAnthony Liguori return -1; 420019d6b8fSAnthony Liguori } 421019d6b8fSAnthony Liguori 422019d6b8fSAnthony Liguori static int vpc_read(BlockDriverState *bs, int64_t sector_num, 423019d6b8fSAnthony Liguori uint8_t *buf, int nb_sectors) 424019d6b8fSAnthony Liguori { 4256c6ea921SKevin Wolf BDRVVPCState *s = bs->opaque; 426019d6b8fSAnthony Liguori int ret; 427019d6b8fSAnthony Liguori int64_t offset; 4286c6ea921SKevin Wolf int64_t sectors, sectors_per_block; 42924da78dbSCharles Arnold struct vhd_footer *footer = (struct vhd_footer *) s->footer_buf; 430019d6b8fSAnthony Liguori 43124da78dbSCharles Arnold if (cpu_to_be32(footer->type) == VHD_FIXED) { 43224da78dbSCharles Arnold return bdrv_read(bs->file, sector_num, buf, nb_sectors); 43324da78dbSCharles Arnold } 434019d6b8fSAnthony Liguori while (nb_sectors > 0) { 435019d6b8fSAnthony Liguori offset = get_sector_offset(bs, sector_num, 0); 436019d6b8fSAnthony Liguori 4376c6ea921SKevin Wolf sectors_per_block = s->block_size >> BDRV_SECTOR_BITS; 4386c6ea921SKevin Wolf sectors = sectors_per_block - (sector_num % sectors_per_block); 4396c6ea921SKevin Wolf if (sectors > nb_sectors) { 4406c6ea921SKevin Wolf sectors = nb_sectors; 441019d6b8fSAnthony Liguori } 442019d6b8fSAnthony Liguori 4436c6ea921SKevin Wolf if (offset == -1) { 4446c6ea921SKevin Wolf memset(buf, 0, sectors * BDRV_SECTOR_SIZE); 4456c6ea921SKevin Wolf } else { 4466c6ea921SKevin Wolf ret = bdrv_pread(bs->file, offset, buf, 4476c6ea921SKevin Wolf sectors * BDRV_SECTOR_SIZE); 4486c6ea921SKevin Wolf if (ret != sectors * BDRV_SECTOR_SIZE) { 4496c6ea921SKevin Wolf return -1; 4506c6ea921SKevin Wolf } 4516c6ea921SKevin Wolf } 4526c6ea921SKevin Wolf 4536c6ea921SKevin Wolf nb_sectors -= sectors; 4546c6ea921SKevin Wolf sector_num += sectors; 4556c6ea921SKevin Wolf buf += sectors * BDRV_SECTOR_SIZE; 456019d6b8fSAnthony Liguori } 457019d6b8fSAnthony Liguori return 0; 458019d6b8fSAnthony Liguori } 459019d6b8fSAnthony Liguori 4602914caa0SPaolo Bonzini static coroutine_fn int vpc_co_read(BlockDriverState *bs, int64_t sector_num, 4612914caa0SPaolo Bonzini uint8_t *buf, int nb_sectors) 4622914caa0SPaolo Bonzini { 4632914caa0SPaolo Bonzini int ret; 4642914caa0SPaolo Bonzini BDRVVPCState *s = bs->opaque; 4652914caa0SPaolo Bonzini qemu_co_mutex_lock(&s->lock); 4662914caa0SPaolo Bonzini ret = vpc_read(bs, sector_num, buf, nb_sectors); 4672914caa0SPaolo Bonzini qemu_co_mutex_unlock(&s->lock); 4682914caa0SPaolo Bonzini return ret; 4692914caa0SPaolo Bonzini } 4702914caa0SPaolo Bonzini 471019d6b8fSAnthony Liguori static int vpc_write(BlockDriverState *bs, int64_t sector_num, 472019d6b8fSAnthony Liguori const uint8_t *buf, int nb_sectors) 473019d6b8fSAnthony Liguori { 4746c6ea921SKevin Wolf BDRVVPCState *s = bs->opaque; 475019d6b8fSAnthony Liguori int64_t offset; 4766c6ea921SKevin Wolf int64_t sectors, sectors_per_block; 477019d6b8fSAnthony Liguori int ret; 47824da78dbSCharles Arnold struct vhd_footer *footer = (struct vhd_footer *) s->footer_buf; 479019d6b8fSAnthony Liguori 48024da78dbSCharles Arnold if (cpu_to_be32(footer->type) == VHD_FIXED) { 48124da78dbSCharles Arnold return bdrv_write(bs->file, sector_num, buf, nb_sectors); 48224da78dbSCharles Arnold } 483019d6b8fSAnthony Liguori while (nb_sectors > 0) { 484019d6b8fSAnthony Liguori offset = get_sector_offset(bs, sector_num, 1); 485019d6b8fSAnthony Liguori 4866c6ea921SKevin Wolf sectors_per_block = s->block_size >> BDRV_SECTOR_BITS; 4876c6ea921SKevin Wolf sectors = sectors_per_block - (sector_num % sectors_per_block); 4886c6ea921SKevin Wolf if (sectors > nb_sectors) { 4896c6ea921SKevin Wolf sectors = nb_sectors; 4906c6ea921SKevin Wolf } 4916c6ea921SKevin Wolf 492019d6b8fSAnthony Liguori if (offset == -1) { 493019d6b8fSAnthony Liguori offset = alloc_block(bs, sector_num); 494019d6b8fSAnthony Liguori if (offset < 0) 495019d6b8fSAnthony Liguori return -1; 496019d6b8fSAnthony Liguori } 497019d6b8fSAnthony Liguori 4986c6ea921SKevin Wolf ret = bdrv_pwrite(bs->file, offset, buf, sectors * BDRV_SECTOR_SIZE); 4996c6ea921SKevin Wolf if (ret != sectors * BDRV_SECTOR_SIZE) { 500019d6b8fSAnthony Liguori return -1; 5016c6ea921SKevin Wolf } 502019d6b8fSAnthony Liguori 5036c6ea921SKevin Wolf nb_sectors -= sectors; 5046c6ea921SKevin Wolf sector_num += sectors; 5056c6ea921SKevin Wolf buf += sectors * BDRV_SECTOR_SIZE; 506019d6b8fSAnthony Liguori } 507019d6b8fSAnthony Liguori 508019d6b8fSAnthony Liguori return 0; 509019d6b8fSAnthony Liguori } 510019d6b8fSAnthony Liguori 511e183ef75SPaolo Bonzini static coroutine_fn int vpc_co_write(BlockDriverState *bs, int64_t sector_num, 512e183ef75SPaolo Bonzini const uint8_t *buf, int nb_sectors) 513e183ef75SPaolo Bonzini { 514e183ef75SPaolo Bonzini int ret; 515e183ef75SPaolo Bonzini BDRVVPCState *s = bs->opaque; 516e183ef75SPaolo Bonzini qemu_co_mutex_lock(&s->lock); 517e183ef75SPaolo Bonzini ret = vpc_write(bs, sector_num, buf, nb_sectors); 518e183ef75SPaolo Bonzini qemu_co_mutex_unlock(&s->lock); 519e183ef75SPaolo Bonzini return ret; 520e183ef75SPaolo Bonzini } 521e183ef75SPaolo Bonzini 522019d6b8fSAnthony Liguori /* 523019d6b8fSAnthony Liguori * Calculates the number of cylinders, heads and sectors per cylinder 524019d6b8fSAnthony Liguori * based on a given number of sectors. This is the algorithm described 525019d6b8fSAnthony Liguori * in the VHD specification. 526019d6b8fSAnthony Liguori * 527019d6b8fSAnthony Liguori * Note that the geometry doesn't always exactly match total_sectors but 528019d6b8fSAnthony Liguori * may round it down. 529019d6b8fSAnthony Liguori * 530019d6b8fSAnthony Liguori * Returns 0 on success, -EFBIG if the size is larger than 127 GB 531019d6b8fSAnthony Liguori */ 532019d6b8fSAnthony Liguori static int calculate_geometry(int64_t total_sectors, uint16_t* cyls, 533019d6b8fSAnthony Liguori uint8_t* heads, uint8_t* secs_per_cyl) 534019d6b8fSAnthony Liguori { 535019d6b8fSAnthony Liguori uint32_t cyls_times_heads; 536019d6b8fSAnthony Liguori 537019d6b8fSAnthony Liguori if (total_sectors > 65535 * 16 * 255) 538019d6b8fSAnthony Liguori return -EFBIG; 539019d6b8fSAnthony Liguori 540019d6b8fSAnthony Liguori if (total_sectors > 65535 * 16 * 63) { 541019d6b8fSAnthony Liguori *secs_per_cyl = 255; 542019d6b8fSAnthony Liguori *heads = 16; 543019d6b8fSAnthony Liguori cyls_times_heads = total_sectors / *secs_per_cyl; 544019d6b8fSAnthony Liguori } else { 545019d6b8fSAnthony Liguori *secs_per_cyl = 17; 546019d6b8fSAnthony Liguori cyls_times_heads = total_sectors / *secs_per_cyl; 547019d6b8fSAnthony Liguori *heads = (cyls_times_heads + 1023) / 1024; 548019d6b8fSAnthony Liguori 549019d6b8fSAnthony Liguori if (*heads < 4) 550019d6b8fSAnthony Liguori *heads = 4; 551019d6b8fSAnthony Liguori 552019d6b8fSAnthony Liguori if (cyls_times_heads >= (*heads * 1024) || *heads > 16) { 553019d6b8fSAnthony Liguori *secs_per_cyl = 31; 554019d6b8fSAnthony Liguori *heads = 16; 555019d6b8fSAnthony Liguori cyls_times_heads = total_sectors / *secs_per_cyl; 556019d6b8fSAnthony Liguori } 557019d6b8fSAnthony Liguori 558019d6b8fSAnthony Liguori if (cyls_times_heads >= (*heads * 1024)) { 559019d6b8fSAnthony Liguori *secs_per_cyl = 63; 560019d6b8fSAnthony Liguori *heads = 16; 561019d6b8fSAnthony Liguori cyls_times_heads = total_sectors / *secs_per_cyl; 562019d6b8fSAnthony Liguori } 563019d6b8fSAnthony Liguori } 564019d6b8fSAnthony Liguori 565dede4188SStefan Weil *cyls = cyls_times_heads / *heads; 566019d6b8fSAnthony Liguori 567019d6b8fSAnthony Liguori return 0; 568019d6b8fSAnthony Liguori } 569019d6b8fSAnthony Liguori 57024da78dbSCharles Arnold static int create_dynamic_disk(int fd, uint8_t *buf, int64_t total_sectors) 571019d6b8fSAnthony Liguori { 572019d6b8fSAnthony Liguori struct vhd_dyndisk_header* dyndisk_header = 573019d6b8fSAnthony Liguori (struct vhd_dyndisk_header*) buf; 574019d6b8fSAnthony Liguori size_t block_size, num_bat_entries; 57524da78dbSCharles Arnold int i; 576f0ff243aSBlue Swirl int ret = -EIO; 577019d6b8fSAnthony Liguori 578019d6b8fSAnthony Liguori // Write the footer (twice: at the beginning and at the end) 579019d6b8fSAnthony Liguori block_size = 0x200000; 580019d6b8fSAnthony Liguori num_bat_entries = (total_sectors + block_size / 512) / (block_size / 512); 581019d6b8fSAnthony Liguori 582f0ff243aSBlue Swirl if (write(fd, buf, HEADER_SIZE) != HEADER_SIZE) { 583f0ff243aSBlue Swirl goto fail; 584f0ff243aSBlue Swirl } 585019d6b8fSAnthony Liguori 586f0ff243aSBlue Swirl if (lseek(fd, 1536 + ((num_bat_entries * 4 + 511) & ~511), SEEK_SET) < 0) { 587f0ff243aSBlue Swirl goto fail; 588f0ff243aSBlue Swirl } 589f0ff243aSBlue Swirl if (write(fd, buf, HEADER_SIZE) != HEADER_SIZE) { 590f0ff243aSBlue Swirl goto fail; 591f0ff243aSBlue Swirl } 592019d6b8fSAnthony Liguori 593019d6b8fSAnthony Liguori // Write the initial BAT 594f0ff243aSBlue Swirl if (lseek(fd, 3 * 512, SEEK_SET) < 0) { 595f0ff243aSBlue Swirl goto fail; 596f0ff243aSBlue Swirl } 597019d6b8fSAnthony Liguori 598019d6b8fSAnthony Liguori memset(buf, 0xFF, 512); 599f0ff243aSBlue Swirl for (i = 0; i < (num_bat_entries * 4 + 511) / 512; i++) { 600f0ff243aSBlue Swirl if (write(fd, buf, 512) != 512) { 601f0ff243aSBlue Swirl goto fail; 602f0ff243aSBlue Swirl } 603f0ff243aSBlue Swirl } 604019d6b8fSAnthony Liguori 605019d6b8fSAnthony Liguori // Prepare the Dynamic Disk Header 606019d6b8fSAnthony Liguori memset(buf, 0, 1024); 607019d6b8fSAnthony Liguori 6085ec4d682SNathan Froyd memcpy(dyndisk_header->magic, "cxsparse", 8); 609019d6b8fSAnthony Liguori 61078439f6aSCharles Arnold /* 61178439f6aSCharles Arnold * Note: The spec is actually wrong here for data_offset, it says 61278439f6aSCharles Arnold * 0xFFFFFFFF, but MS tools expect all 64 bits to be set. 61378439f6aSCharles Arnold */ 61478439f6aSCharles Arnold dyndisk_header->data_offset = be64_to_cpu(0xFFFFFFFFFFFFFFFFULL); 615019d6b8fSAnthony Liguori dyndisk_header->table_offset = be64_to_cpu(3 * 512); 616019d6b8fSAnthony Liguori dyndisk_header->version = be32_to_cpu(0x00010000); 617019d6b8fSAnthony Liguori dyndisk_header->block_size = be32_to_cpu(block_size); 618019d6b8fSAnthony Liguori dyndisk_header->max_table_entries = be32_to_cpu(num_bat_entries); 619019d6b8fSAnthony Liguori 620019d6b8fSAnthony Liguori dyndisk_header->checksum = be32_to_cpu(vpc_checksum(buf, 1024)); 621019d6b8fSAnthony Liguori 622019d6b8fSAnthony Liguori // Write the header 623f0ff243aSBlue Swirl if (lseek(fd, 512, SEEK_SET) < 0) { 624f0ff243aSBlue Swirl goto fail; 625f0ff243aSBlue Swirl } 626019d6b8fSAnthony Liguori 627f0ff243aSBlue Swirl if (write(fd, buf, 1024) != 1024) { 628f0ff243aSBlue Swirl goto fail; 629f0ff243aSBlue Swirl } 630f0ff243aSBlue Swirl ret = 0; 631f0ff243aSBlue Swirl 632f0ff243aSBlue Swirl fail: 63324da78dbSCharles Arnold return ret; 63424da78dbSCharles Arnold } 63524da78dbSCharles Arnold 63624da78dbSCharles Arnold static int create_fixed_disk(int fd, uint8_t *buf, int64_t total_size) 63724da78dbSCharles Arnold { 63824da78dbSCharles Arnold int ret = -EIO; 63924da78dbSCharles Arnold 64024da78dbSCharles Arnold /* Add footer to total size */ 64124da78dbSCharles Arnold total_size += 512; 64224da78dbSCharles Arnold if (ftruncate(fd, total_size) != 0) { 64324da78dbSCharles Arnold ret = -errno; 64424da78dbSCharles Arnold goto fail; 64524da78dbSCharles Arnold } 64624da78dbSCharles Arnold if (lseek(fd, -512, SEEK_END) < 0) { 64724da78dbSCharles Arnold goto fail; 64824da78dbSCharles Arnold } 64924da78dbSCharles Arnold if (write(fd, buf, HEADER_SIZE) != HEADER_SIZE) { 65024da78dbSCharles Arnold goto fail; 65124da78dbSCharles Arnold } 65224da78dbSCharles Arnold 65324da78dbSCharles Arnold ret = 0; 65424da78dbSCharles Arnold 65524da78dbSCharles Arnold fail: 65624da78dbSCharles Arnold return ret; 65724da78dbSCharles Arnold } 65824da78dbSCharles Arnold 65924da78dbSCharles Arnold static int vpc_create(const char *filename, QEMUOptionParameter *options) 66024da78dbSCharles Arnold { 66124da78dbSCharles Arnold uint8_t buf[1024]; 66224da78dbSCharles Arnold struct vhd_footer *footer = (struct vhd_footer *) buf; 66324da78dbSCharles Arnold QEMUOptionParameter *disk_type_param; 66424da78dbSCharles Arnold int fd, i; 66524da78dbSCharles Arnold uint16_t cyls = 0; 66624da78dbSCharles Arnold uint8_t heads = 0; 66724da78dbSCharles Arnold uint8_t secs_per_cyl = 0; 66824da78dbSCharles Arnold int64_t total_sectors; 66924da78dbSCharles Arnold int64_t total_size; 67024da78dbSCharles Arnold int disk_type; 67124da78dbSCharles Arnold int ret = -EIO; 67224da78dbSCharles Arnold 67324da78dbSCharles Arnold /* Read out options */ 67424da78dbSCharles Arnold total_size = get_option_parameter(options, BLOCK_OPT_SIZE)->value.n; 67524da78dbSCharles Arnold 67624da78dbSCharles Arnold disk_type_param = get_option_parameter(options, BLOCK_OPT_SUBFMT); 67724da78dbSCharles Arnold if (disk_type_param && disk_type_param->value.s) { 67824da78dbSCharles Arnold if (!strcmp(disk_type_param->value.s, "dynamic")) { 67924da78dbSCharles Arnold disk_type = VHD_DYNAMIC; 68024da78dbSCharles Arnold } else if (!strcmp(disk_type_param->value.s, "fixed")) { 68124da78dbSCharles Arnold disk_type = VHD_FIXED; 68224da78dbSCharles Arnold } else { 68324da78dbSCharles Arnold return -EINVAL; 68424da78dbSCharles Arnold } 68524da78dbSCharles Arnold } else { 68624da78dbSCharles Arnold disk_type = VHD_DYNAMIC; 68724da78dbSCharles Arnold } 68824da78dbSCharles Arnold 68924da78dbSCharles Arnold /* Create the file */ 6906165f4d8SCorey Bryant fd = qemu_open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0644); 69124da78dbSCharles Arnold if (fd < 0) { 69224da78dbSCharles Arnold return -EIO; 69324da78dbSCharles Arnold } 69424da78dbSCharles Arnold 695ecd880d9SKevin Wolf /* 696ecd880d9SKevin Wolf * Calculate matching total_size and geometry. Increase the number of 697ecd880d9SKevin Wolf * sectors requested until we get enough (or fail). This ensures that 698ecd880d9SKevin Wolf * qemu-img convert doesn't truncate images, but rather rounds up. 699ecd880d9SKevin Wolf */ 70024da78dbSCharles Arnold total_sectors = total_size / BDRV_SECTOR_SIZE; 701ecd880d9SKevin Wolf for (i = 0; total_sectors > (int64_t)cyls * heads * secs_per_cyl; i++) { 702ecd880d9SKevin Wolf if (calculate_geometry(total_sectors + i, &cyls, &heads, 703ecd880d9SKevin Wolf &secs_per_cyl)) 704ecd880d9SKevin Wolf { 70524da78dbSCharles Arnold ret = -EFBIG; 70624da78dbSCharles Arnold goto fail; 70724da78dbSCharles Arnold } 70824da78dbSCharles Arnold } 709ecd880d9SKevin Wolf 71024da78dbSCharles Arnold total_sectors = (int64_t) cyls * heads * secs_per_cyl; 71124da78dbSCharles Arnold 71224da78dbSCharles Arnold /* Prepare the Hard Disk Footer */ 71324da78dbSCharles Arnold memset(buf, 0, 1024); 71424da78dbSCharles Arnold 71524da78dbSCharles Arnold memcpy(footer->creator, "conectix", 8); 71624da78dbSCharles Arnold /* TODO Check if "qemu" creator_app is ok for VPC */ 71724da78dbSCharles Arnold memcpy(footer->creator_app, "qemu", 4); 71824da78dbSCharles Arnold memcpy(footer->creator_os, "Wi2k", 4); 71924da78dbSCharles Arnold 72024da78dbSCharles Arnold footer->features = be32_to_cpu(0x02); 72124da78dbSCharles Arnold footer->version = be32_to_cpu(0x00010000); 72224da78dbSCharles Arnold if (disk_type == VHD_DYNAMIC) { 72324da78dbSCharles Arnold footer->data_offset = be64_to_cpu(HEADER_SIZE); 72424da78dbSCharles Arnold } else { 72524da78dbSCharles Arnold footer->data_offset = be64_to_cpu(0xFFFFFFFFFFFFFFFFULL); 72624da78dbSCharles Arnold } 72724da78dbSCharles Arnold footer->timestamp = be32_to_cpu(time(NULL) - VHD_TIMESTAMP_BASE); 72824da78dbSCharles Arnold 72924da78dbSCharles Arnold /* Version of Virtual PC 2007 */ 73024da78dbSCharles Arnold footer->major = be16_to_cpu(0x0005); 73124da78dbSCharles Arnold footer->minor = be16_to_cpu(0x0003); 73224da78dbSCharles Arnold if (disk_type == VHD_DYNAMIC) { 73324da78dbSCharles Arnold footer->orig_size = be64_to_cpu(total_sectors * 512); 73424da78dbSCharles Arnold footer->size = be64_to_cpu(total_sectors * 512); 73524da78dbSCharles Arnold } else { 73624da78dbSCharles Arnold footer->orig_size = be64_to_cpu(total_size); 73724da78dbSCharles Arnold footer->size = be64_to_cpu(total_size); 73824da78dbSCharles Arnold } 73924da78dbSCharles Arnold footer->cyls = be16_to_cpu(cyls); 74024da78dbSCharles Arnold footer->heads = heads; 74124da78dbSCharles Arnold footer->secs_per_cyl = secs_per_cyl; 74224da78dbSCharles Arnold 74324da78dbSCharles Arnold footer->type = be32_to_cpu(disk_type); 74424da78dbSCharles Arnold 745*1fe1fa51SCharles Arnold #if defined(CONFIG_UUID) 746*1fe1fa51SCharles Arnold uuid_generate(footer->uuid); 747*1fe1fa51SCharles Arnold #endif 74824da78dbSCharles Arnold 74924da78dbSCharles Arnold footer->checksum = be32_to_cpu(vpc_checksum(buf, HEADER_SIZE)); 75024da78dbSCharles Arnold 75124da78dbSCharles Arnold if (disk_type == VHD_DYNAMIC) { 75224da78dbSCharles Arnold ret = create_dynamic_disk(fd, buf, total_sectors); 75324da78dbSCharles Arnold } else { 75424da78dbSCharles Arnold ret = create_fixed_disk(fd, buf, total_size); 75524da78dbSCharles Arnold } 75624da78dbSCharles Arnold 75724da78dbSCharles Arnold fail: 7582e1e79daSCorey Bryant qemu_close(fd); 759f0ff243aSBlue Swirl return ret; 760019d6b8fSAnthony Liguori } 761019d6b8fSAnthony Liguori 762019d6b8fSAnthony Liguori static void vpc_close(BlockDriverState *bs) 763019d6b8fSAnthony Liguori { 764019d6b8fSAnthony Liguori BDRVVPCState *s = bs->opaque; 7657267c094SAnthony Liguori g_free(s->pagetable); 766019d6b8fSAnthony Liguori #ifdef CACHE 7677267c094SAnthony Liguori g_free(s->pageentry_u8); 768019d6b8fSAnthony Liguori #endif 769612ff3d8SKevin Wolf 770612ff3d8SKevin Wolf migrate_del_blocker(s->migration_blocker); 771612ff3d8SKevin Wolf error_free(s->migration_blocker); 772019d6b8fSAnthony Liguori } 773019d6b8fSAnthony Liguori 7740e7e1989SKevin Wolf static QEMUOptionParameter vpc_create_options[] = { 775db08adf5SKevin Wolf { 776db08adf5SKevin Wolf .name = BLOCK_OPT_SIZE, 777db08adf5SKevin Wolf .type = OPT_SIZE, 778db08adf5SKevin Wolf .help = "Virtual disk size" 779db08adf5SKevin Wolf }, 78024da78dbSCharles Arnold { 78124da78dbSCharles Arnold .name = BLOCK_OPT_SUBFMT, 78224da78dbSCharles Arnold .type = OPT_STRING, 78324da78dbSCharles Arnold .help = 78424da78dbSCharles Arnold "Type of virtual hard disk format. Supported formats are " 78524da78dbSCharles Arnold "{dynamic (default) | fixed} " 78624da78dbSCharles Arnold }, 7870e7e1989SKevin Wolf { NULL } 7880e7e1989SKevin Wolf }; 7890e7e1989SKevin Wolf 790019d6b8fSAnthony Liguori static BlockDriver bdrv_vpc = { 791019d6b8fSAnthony Liguori .format_name = "vpc", 792019d6b8fSAnthony Liguori .instance_size = sizeof(BDRVVPCState), 793c68b89acSKevin Wolf 794019d6b8fSAnthony Liguori .bdrv_probe = vpc_probe, 795019d6b8fSAnthony Liguori .bdrv_open = vpc_open, 796019d6b8fSAnthony Liguori .bdrv_close = vpc_close, 7973fe4b700SJeff Cody .bdrv_reopen_prepare = vpc_reopen_prepare, 798019d6b8fSAnthony Liguori .bdrv_create = vpc_create, 7990e7e1989SKevin Wolf 800c68b89acSKevin Wolf .bdrv_read = vpc_co_read, 801c68b89acSKevin Wolf .bdrv_write = vpc_co_write, 802c68b89acSKevin Wolf 8030e7e1989SKevin Wolf .create_options = vpc_create_options, 804019d6b8fSAnthony Liguori }; 805019d6b8fSAnthony Liguori 806019d6b8fSAnthony Liguori static void bdrv_vpc_init(void) 807019d6b8fSAnthony Liguori { 808019d6b8fSAnthony Liguori bdrv_register(&bdrv_vpc); 809019d6b8fSAnthony Liguori } 810019d6b8fSAnthony Liguori 811019d6b8fSAnthony Liguori block_init(bdrv_vpc_init); 812