/* * Block driver for Parallels disk image format * * Copyright (c) 2015-2017 Virtuozzo, Inc. * Authors: * 2016-2017 Klim S. Kireev <klim.kireev@virtuozzo.com> * 2015 Denis V. Lunev <den@openvz.org> * * This code was originally based on comparing different disk images created * by Parallels. Currently it is based on opened OpenVZ sources * available at * https://github.com/OpenVZ/ploop * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #ifndef BLOCK_PARALLELS_H #define BLOCK_PARALLELS_H #include "qemu/coroutine.h" #define HEADS_NUMBER 16 #define SEC_IN_CYL 32 #define DEFAULT_CLUSTER_SIZE 1048576 /* 1 MiB */ /* always little-endian */ typedef struct ParallelsHeader { char magic[16]; /* "WithoutFreeSpace" */ uint32_t version; uint32_t heads; uint32_t cylinders; uint32_t tracks; uint32_t bat_entries; uint64_t nb_sectors; uint32_t inuse; uint32_t data_off; uint32_t flags; uint64_t ext_off; } QEMU_PACKED ParallelsHeader; typedef enum ParallelsPreallocMode { PRL_PREALLOC_MODE_FALLOCATE = 0, PRL_PREALLOC_MODE_TRUNCATE = 1, PRL_PREALLOC_MODE__MAX = 2, } ParallelsPreallocMode; typedef struct BDRVParallelsState { /** Locking is conservative, the lock protects * - image file extending (truncate, fallocate) * - any access to block allocation table */ CoMutex lock; ParallelsHeader *header; uint32_t header_size; bool header_unclean; unsigned long *bat_dirty_bmap; unsigned int bat_dirty_block; uint32_t *bat_bitmap; unsigned int bat_size; int64_t data_end; uint64_t prealloc_size; ParallelsPreallocMode prealloc_mode; unsigned int tracks; unsigned int cluster_size; unsigned int off_multiplier; Error *migration_blocker; } BDRVParallelsState; int parallels_read_format_extension(BlockDriverState *bs, int64_t ext_off, Error **errp); #endif