cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
Log | Files | Refs | Submodules | LICENSE | sfeed.txt

parallels.h (2973B)

      1/*
      2* Block driver for Parallels disk image format
      3*
      4* Copyright (c) 2015-2017 Virtuozzo, Inc.
      5* Authors:
      6*         2016-2017 Klim S. Kireev <klim.kireev@virtuozzo.com>
      7*         2015 Denis V. Lunev <den@openvz.org>
      8*
      9* This code was originally based on comparing different disk images created
     10* by Parallels. Currently it is based on opened OpenVZ sources
     11* available at
     12*     https://github.com/OpenVZ/ploop
     13*
     14* Permission is hereby granted, free of charge, to any person obtaining a copy
     15* of this software and associated documentation files (the "Software"), to deal
     16* in the Software without restriction, including without limitation the rights
     17* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     18* copies of the Software, and to permit persons to whom the Software is
     19* furnished to do so, subject to the following conditions:
     20*
     21* The above copyright notice and this permission notice shall be included in
     22* all copies or substantial portions of the Software.
     23*
     24* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     25* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     26* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
     27* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     28* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     29* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
     30* THE SOFTWARE.
     31*/
     32#ifndef BLOCK_PARALLELS_H
     33#define BLOCK_PARALLELS_H
     34#include "qemu/coroutine.h"
     35
     36#define HEADS_NUMBER 16
     37#define SEC_IN_CYL 32
     38#define DEFAULT_CLUSTER_SIZE 1048576        /* 1 MiB */
     39
     40/* always little-endian */
     41typedef struct ParallelsHeader {
     42    char magic[16]; /* "WithoutFreeSpace" */
     43    uint32_t version;
     44    uint32_t heads;
     45    uint32_t cylinders;
     46    uint32_t tracks;
     47    uint32_t bat_entries;
     48    uint64_t nb_sectors;
     49    uint32_t inuse;
     50    uint32_t data_off;
     51    uint32_t flags;
     52    uint64_t ext_off;
     53} QEMU_PACKED ParallelsHeader;
     54
     55typedef enum ParallelsPreallocMode {
     56    PRL_PREALLOC_MODE_FALLOCATE = 0,
     57    PRL_PREALLOC_MODE_TRUNCATE = 1,
     58    PRL_PREALLOC_MODE__MAX = 2,
     59} ParallelsPreallocMode;
     60
     61typedef struct BDRVParallelsState {
     62    /** Locking is conservative, the lock protects
     63     *   - image file extending (truncate, fallocate)
     64     *   - any access to block allocation table
     65     */
     66    CoMutex lock;
     67
     68    ParallelsHeader *header;
     69    uint32_t header_size;
     70    bool header_unclean;
     71
     72    unsigned long *bat_dirty_bmap;
     73    unsigned int  bat_dirty_block;
     74
     75    uint32_t *bat_bitmap;
     76    unsigned int bat_size;
     77
     78    int64_t  data_end;
     79    uint64_t prealloc_size;
     80    ParallelsPreallocMode prealloc_mode;
     81
     82    unsigned int tracks;
     83    unsigned int cluster_size;
     84
     85    unsigned int off_multiplier;
     86    Error *migration_blocker;
     87} BDRVParallelsState;
     88
     89int parallels_read_format_extension(BlockDriverState *bs,
     90                                    int64_t ext_off, Error **errp);
     91
     92#endif