138 lines
3.8 KiB
C++
138 lines
3.8 KiB
C++
// Copyright (C) 2011 Red Hat, Inc. All rights reserved.
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//
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// This file is part of the thin-provisioning-tools source.
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//
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// thin-provisioning-tools is free software: you can redistribute it
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// and/or modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation, either version 3 of
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// the License, or (at your option) any later version.
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//
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// thin-provisioning-tools is distributed in the hope that it will be
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// useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with thin-provisioning-tools. If not, see
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// <http://www.gnu.org/licenses/>.
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#ifndef METADATA_DISK_STRUCTURES_H
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#define METADATA_DISK_STRUCTURES_H
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#include "persistent-data/endian_utils.h"
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#include "persistent-data/data-structures/btree.h"
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//----------------------------------------------------------------
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namespace thin_provisioning {
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using namespace base; // FIXME: don't use namespaces in headers.
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struct device_details_disk {
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le64 mapped_blocks_;
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le64 transaction_id_; /* when created */
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le32 creation_time_;
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le32 snapshotted_time_;
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} __attribute__ ((packed));
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struct device_details {
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uint64_t mapped_blocks_;
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uint64_t transaction_id_; /* when created */
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uint32_t creation_time_;
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uint32_t snapshotted_time_;
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};
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struct device_details_traits {
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typedef device_details_disk disk_type;
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typedef device_details value_type;
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typedef persistent_data::no_op_ref_counter<device_details> ref_counter;
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static void unpack(device_details_disk const &disk, device_details &value);
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static void pack(device_details const &value, device_details_disk &disk);
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};
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unsigned const SPACE_MAP_ROOT_SIZE = 128;
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typedef unsigned char __u8;
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struct superblock_disk {
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le32 csum_;
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le32 flags_;
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le64 blocknr_;
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__u8 uuid_[16];
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le64 magic_;
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le32 version_;
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le32 time_;
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le64 trans_id_;
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/* root for userspace's transaction (for migration and friends) */
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le64 metadata_snap_;
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__u8 data_space_map_root_[SPACE_MAP_ROOT_SIZE];
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__u8 metadata_space_map_root_[SPACE_MAP_ROOT_SIZE];
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/* 2 level btree mapping (dev_id, (dev block, time)) -> data block */
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le64 data_mapping_root_;
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/* device detail root mapping dev_id -> device_details */
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le64 device_details_root_;
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le32 data_block_size_; /* in 512-byte sectors */
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le32 metadata_block_size_; /* in 512-byte sectors */
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le64 metadata_nr_blocks_;
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le32 compat_flags_;
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le32 compat_ro_flags_;
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le32 incompat_flags_;
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} __attribute__ ((packed));
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struct superblock {
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uint32_t csum_;
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uint32_t flags_;
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uint64_t blocknr_;
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unsigned char uuid_[16];
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uint64_t magic_;
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uint32_t version_;
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uint32_t time_;
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uint64_t trans_id_;
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/* root for userspace's transaction (for migration and friends) */
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uint64_t metadata_snap_;
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unsigned char data_space_map_root_[SPACE_MAP_ROOT_SIZE];
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unsigned char metadata_space_map_root_[SPACE_MAP_ROOT_SIZE];
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/* 2 level btree mapping (dev_id, (dev block, time)) -> data block */
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uint64_t data_mapping_root_;
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/* device detail root mapping dev_id -> device_details */
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uint64_t device_details_root_;
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uint32_t data_block_size_; /* in 512-byte sectors */
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uint32_t metadata_block_size_; /* in 512-byte sectors */
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uint64_t metadata_nr_blocks_;
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uint32_t compat_flags_;
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uint32_t compat_ro_flags_;
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uint32_t incompat_flags_;
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};
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struct superblock_traits {
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typedef superblock_disk disk_type;
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typedef superblock value_type;
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typedef no_op_ref_counter<superblock> ref_counter;
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static void unpack(superblock_disk const &disk, superblock &core);
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static void pack(superblock const &core, superblock_disk &disk);
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};
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block_address const SUPERBLOCK_LOCATION = 0;
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}
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//----------------------------------------------------------------
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#endif
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