118 lines
3.0 KiB
C++
118 lines
3.0 KiB
C++
#ifndef METADATA_DISK_STRUCTURES_H
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#define METADATA_DISK_STRUCTURES_H
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#include "endian_utils.h"
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#include "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::NoOpRefCounter<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 held_root_;
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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 held_root_;
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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 NoOpRefCounter<superblock> ref_counter;
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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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