cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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dm-space-map-metadata.h (1142B)

      1/*
      2 * Copyright (C) 2011 Red Hat, Inc.
      3 *
      4 * This file is released under the GPL.
      5 */
      6
      7#ifndef DM_SPACE_MAP_METADATA_H
      8#define DM_SPACE_MAP_METADATA_H
      9
     10#include "dm-transaction-manager.h"
     11
     12#define DM_SM_METADATA_BLOCK_SIZE (4096 >> SECTOR_SHIFT)
     13
     14/*
     15 * The metadata device is currently limited in size.
     16 *
     17 * We have one block of index, which can hold 255 index entries.  Each
     18 * index entry contains allocation info about ~16k metadata blocks.
     19 */
     20#define DM_SM_METADATA_MAX_BLOCKS (255 * ((1 << 14) - 64))
     21#define DM_SM_METADATA_MAX_SECTORS (DM_SM_METADATA_MAX_BLOCKS * DM_SM_METADATA_BLOCK_SIZE)
     22
     23/*
     24 * Unfortunately we have to use two-phase construction due to the cycle
     25 * between the tm and sm.
     26 */
     27struct dm_space_map *dm_sm_metadata_init(void);
     28
     29/*
     30 * Create a fresh space map.
     31 */
     32int dm_sm_metadata_create(struct dm_space_map *sm,
     33			  struct dm_transaction_manager *tm,
     34			  dm_block_t nr_blocks,
     35			  dm_block_t superblock);
     36
     37/*
     38 * Open from a previously-recorded root.
     39 */
     40int dm_sm_metadata_open(struct dm_space_map *sm,
     41			struct dm_transaction_manager *tm,
     42			void *root_le, size_t len);
     43
     44#endif	/* DM_SPACE_MAP_METADATA_H */