diff options
| -rw-r--r-- | block/parallels.c | 53 | ||||
| -rw-r--r-- | block/parallels.h | 86 |
2 files changed, 87 insertions, 52 deletions
diff --git a/block/parallels.c b/block/parallels.c index 9545761f49..f9a3b999ea 100644 --- a/block/parallels.c +++ b/block/parallels.c @@ -36,6 +36,7 @@ #include "qemu/bswap.h" #include "qemu/bitmap.h" #include "migration/blocker.h" +#include "parallels.h" /**************************************************************/ @@ -45,30 +46,6 @@ #define HEADER_INUSE_MAGIC (0x746F6E59) #define MAX_PARALLELS_IMAGE_FACTOR (1ull << 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; - static QEnumLookup prealloc_mode_lookup = { .array = (const char *const[]) { "falloc", @@ -77,34 +54,6 @@ static QEnumLookup prealloc_mode_lookup = { .size = PRL_PREALLOC_MODE__MAX }; -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; - - #define PARALLELS_OPT_PREALLOC_MODE "prealloc-mode" #define PARALLELS_OPT_PREALLOC_SIZE "prealloc-size" diff --git a/block/parallels.h b/block/parallels.h new file mode 100644 index 0000000000..71183c0c8e --- /dev/null +++ b/block/parallels.h @@ -0,0 +1,86 @@ +/* +* 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" +#include "qemu/typedefs.h" + +#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 |