mirror of
https://github.com/qemu/qemu.git
synced 2024-12-05 01:33:41 +08:00
baefd97700
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20210224104707.88430-5-vsementsov@virtuozzo.com> Reviewed-by: Denis V. Lunev <den@openvz.org> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
93 lines
2.9 KiB
C
93 lines
2.9 KiB
C
/*
|
|
* 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
|