118 lines
3.0 KiB
C++
118 lines
3.0 KiB
C++
#ifndef METADATA_DISK_STRUCTURES_H
|
|
#define METADATA_DISK_STRUCTURES_H
|
|
|
|
#include "endian.h"
|
|
#include "btree.h"
|
|
|
|
//----------------------------------------------------------------
|
|
|
|
namespace thin_provisioning {
|
|
using namespace base; // FIXME: don't use namespaces in headers.
|
|
|
|
struct device_details_disk {
|
|
__le64 dev_size_;
|
|
__le64 mapped_blocks_;
|
|
__le64 transaction_id_; /* when created */
|
|
__le32 creation_time_;
|
|
__le32 snapshotted_time_;
|
|
} __attribute__ ((packed));
|
|
|
|
struct device_details {
|
|
uint64_t dev_size_;
|
|
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::NoOpRefCounter<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 held_root_;
|
|
|
|
__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 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 held_root_;
|
|
|
|
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 incompat_flags_;
|
|
};
|
|
|
|
struct superblock_traits {
|
|
typedef superblock_disk disk_type;
|
|
typedef superblock value_type;
|
|
typedef NoOpRefCounter<superblock> ref_counter;
|
|
|
|
static void unpack(superblock_disk const &disk, superblock &value);
|
|
static void pack(superblock const &value, superblock_disk &disk);
|
|
};
|
|
}
|
|
|
|
//----------------------------------------------------------------
|
|
|
|
#endif
|