136 lines
3.8 KiB
C++
136 lines
3.8 KiB
C++
// Copyright (C) 2011 Red Hat, Inc. All rights reserved.
|
|
//
|
|
// This file is part of the thin-provisioning-tools source.
|
|
//
|
|
// thin-provisioning-tools is free software: you can redistribute it
|
|
// and/or modify it under the terms of the GNU General Public License
|
|
// as published by the Free Software Foundation, either version 3 of
|
|
// the License, or (at your option) any later version.
|
|
//
|
|
// thin-provisioning-tools is distributed in the hope that it will be
|
|
// useful, but WITHOUT ANY WARRANTY; without even the implied warranty
|
|
// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License along
|
|
// with thin-provisioning-tools. If not, see
|
|
// <http://www.gnu.org/licenses/>.
|
|
|
|
#ifndef METADATA_DISK_STRUCTURES_H
|
|
#define METADATA_DISK_STRUCTURES_H
|
|
|
|
#include "persistent-data/endian_utils.h"
|
|
#include "persistent-data/data-structures/btree.h"
|
|
|
|
//----------------------------------------------------------------
|
|
|
|
namespace thin_provisioning {
|
|
using namespace base; // FIXME: don't use namespaces in headers.
|
|
|
|
struct device_details_disk {
|
|
__le64 mapped_blocks_;
|
|
__le64 transaction_id_; /* when created */
|
|
__le32 creation_time_;
|
|
__le32 snapshotted_time_;
|
|
} __attribute__ ((packed));
|
|
|
|
struct device_details {
|
|
uint64_t mapped_blocks_;
|
|
uint64_t transaction_id_; /* when created */
|
|
uint32_t creation_time_;
|
|
uint32_t snapshotted_time_;
|
|
};
|
|
|
|
struct device_details_traits {
|
|
typedef device_details_disk disk_type;
|
|
typedef device_details value_type;
|
|
typedef persistent_data::no_op_ref_counter<device_details> ref_counter;
|
|
|
|
static void unpack(device_details_disk const &disk, device_details &value);
|
|
static void pack(device_details const &value, device_details_disk &disk);
|
|
};
|
|
|
|
unsigned const SPACE_MAP_ROOT_SIZE = 128;
|
|
|
|
typedef unsigned char __u8;
|
|
|
|
struct superblock_disk {
|
|
__le32 csum_;
|
|
__le32 flags_;
|
|
__le64 blocknr_;
|
|
|
|
__u8 uuid_[16];
|
|
__le64 magic_;
|
|
__le32 version_;
|
|
__le32 time_;
|
|
|
|
__le64 trans_id_;
|
|
/* root for userspace's transaction (for migration and friends) */
|
|
__le64 metadata_snap_;
|
|
|
|
__u8 data_space_map_root_[SPACE_MAP_ROOT_SIZE];
|
|
__u8 metadata_space_map_root_[SPACE_MAP_ROOT_SIZE];
|
|
|
|
/* 2 level btree mapping (dev_id, (dev block, time)) -> data block */
|
|
__le64 data_mapping_root_;
|
|
|
|
/* device detail root mapping dev_id -> device_details */
|
|
__le64 device_details_root_;
|
|
|
|
__le32 data_block_size_; /* in 512-byte sectors */
|
|
|
|
__le32 metadata_block_size_; /* in 512-byte sectors */
|
|
__le64 metadata_nr_blocks_;
|
|
|
|
__le32 compat_flags_;
|
|
__le32 compat_ro_flags_;
|
|
__le32 incompat_flags_;
|
|
} __attribute__ ((packed));
|
|
|
|
struct superblock {
|
|
uint32_t csum_;
|
|
uint32_t flags_;
|
|
uint64_t blocknr_;
|
|
|
|
unsigned char uuid_[16];
|
|
uint64_t magic_;
|
|
uint32_t version_;
|
|
uint32_t time_;
|
|
|
|
uint64_t trans_id_;
|
|
/* root for userspace's transaction (for migration and friends) */
|
|
uint64_t metadata_snap_;
|
|
|
|
unsigned char data_space_map_root_[SPACE_MAP_ROOT_SIZE];
|
|
unsigned char metadata_space_map_root_[SPACE_MAP_ROOT_SIZE];
|
|
|
|
/* 2 level btree mapping (dev_id, (dev block, time)) -> data block */
|
|
uint64_t data_mapping_root_;
|
|
|
|
/* device detail root mapping dev_id -> device_details */
|
|
uint64_t device_details_root_;
|
|
|
|
uint32_t data_block_size_; /* in 512-byte sectors */
|
|
|
|
uint32_t metadata_block_size_; /* in 512-byte sectors */
|
|
uint64_t metadata_nr_blocks_;
|
|
|
|
uint32_t compat_flags_;
|
|
uint32_t compat_ro_flags_;
|
|
uint32_t incompat_flags_;
|
|
};
|
|
|
|
struct superblock_traits {
|
|
typedef superblock_disk disk_type;
|
|
typedef superblock value_type;
|
|
typedef no_op_ref_counter<superblock> ref_counter;
|
|
|
|
static void unpack(superblock_disk const &disk, superblock &value);
|
|
static void pack(superblock const &value, superblock_disk &disk);
|
|
};
|
|
}
|
|
|
|
//----------------------------------------------------------------
|
|
|
|
#endif
|