121 lines
3.1 KiB
C++
121 lines
3.1 KiB
C++
// Copyright (C) 2012 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 CACHE_METADATA_DISK_STRUCTURES_H
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#define CACHE_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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// FIXME: rename to just METADATA_DISK_STRUCTURES
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namespace cache_tools {
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using namespace base; // FIXME: don't use namespaces in headers.
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unsigned const SPACE_MAP_ROOT_SIZE = 128;
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unsigned const CACHE_POLICY_NAME_SIZE = 16;
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unsigned const CACHE_POLICY_VERSION_SIZE = 3;
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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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__u8 policy_name[CACHE_POLICY_NAME_SIZE];
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le32 policy_version[CACHE_POLICY_VERSION_SIZE];
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le32 policy_hint_size;
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__u8 metadata_space_map_root[SPACE_MAP_ROOT_SIZE];
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le64 mapping_root;
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le64 hint_root;
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le64 discard_root;
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le64 discard_block_size;
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le64 discard_nr_blocks;
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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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le32 cache_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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le32 read_hits;
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le32 read_misses;
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le32 write_hits;
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le32 write_misses;
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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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__u8 uuid[16];
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uint64_t magic;
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uint32_t version;
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__u8 policy_name[CACHE_POLICY_NAME_SIZE];
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uint32_t policy_version[CACHE_POLICY_VERSION_SIZE];
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uint32_t policy_hint_size;
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__u8 metadata_space_map_root[SPACE_MAP_ROOT_SIZE];
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uint64_t mapping_root;
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uint64_t hint_root;
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uint64_t discard_root;
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uint64_t discard_block_size;
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uint64_t discard_nr_blocks;
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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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uint32_t cache_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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uint32_t read_hits;
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uint32_t read_misses;
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uint32_t write_hits;
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uint32_t write_misses;
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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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static void unpack(superblock_disk const &disk, superblock &value);
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static void pack(superblock const &value, superblock_disk &disk);
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};
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}
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//----------------------------------------------------------------
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#endif
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