projects / qemu.git / blame
| Commit | Line | Data |
|---|---|---|
| 90fe66f0 KK |
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 <[email protected]> | |
| 7 | * 2015 Denis V. Lunev <[email protected]> | |
| 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" | |
| 90fe66f0 | 35 | |
| 908b1c84 KK |
36 | #define HEADS_NUMBER 16 |
| 37 | #define SEC_IN_CYL 32 | |
| 90fe66f0 KK |
38 | #define DEFAULT_CLUSTER_SIZE 1048576 /* 1 MiB */ |
| 39 | ||
| 40 | /* always little-endian */ | |
| 41 | typedef 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 | char padding[12]; | |
| 52 | } QEMU_PACKED ParallelsHeader; | |
| 53 | ||
| 54 | typedef enum ParallelsPreallocMode { | |
| 55 | PRL_PREALLOC_MODE_FALLOCATE = 0, | |
| 56 | PRL_PREALLOC_MODE_TRUNCATE = 1, | |
| 57 | PRL_PREALLOC_MODE__MAX = 2, | |
| 58 | } ParallelsPreallocMode; | |
| 59 | ||
| 60 | typedef struct BDRVParallelsState { | |
| 61 | /** Locking is conservative, the lock protects | |
| 62 | * - image file extending (truncate, fallocate) | |
| 63 | * - any access to block allocation table | |
| 64 | */ | |
| 65 | CoMutex lock; | |
| 66 | ||
| 67 | ParallelsHeader *header; | |
| 68 | uint32_t header_size; | |
| 69 | bool header_unclean; | |
| 70 | ||
| 71 | unsigned long *bat_dirty_bmap; | |
| 72 | unsigned int bat_dirty_block; | |
| 73 | ||
| 74 | uint32_t *bat_bitmap; | |
| 75 | unsigned int bat_size; | |
| 76 | ||
| 77 | int64_t data_end; | |
| 78 | uint64_t prealloc_size; | |
| 79 | ParallelsPreallocMode prealloc_mode; | |
| 80 | ||
| 81 | unsigned int tracks; | |
| 82 | ||
| 83 | unsigned int off_multiplier; | |
| 84 | Error *migration_blocker; | |
| 85 | } BDRVParallelsState; | |
| 86 | ||
| 87 | #endif |