1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
/*
* 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;
char padding[12];
} 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 off_multiplier;
Error *migration_blocker;
} BDRVParallelsState;
#endif
|
