Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2)  * Copyright (C) 2011 Red Hat, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  * This file is released under the GPL.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #ifndef DM_SPACE_MAP_METADATA_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #define DM_SPACE_MAP_METADATA_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include "dm-transaction-manager.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #define DM_SM_METADATA_BLOCK_SIZE (4096 >> SECTOR_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)  * The metadata device is currently limited in size.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)  * We have one block of index, which can hold 255 index entries.  Each
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)  * index entry contains allocation info about ~16k metadata blocks.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define DM_SM_METADATA_MAX_BLOCKS (255 * ((1 << 14) - 64))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define DM_SM_METADATA_MAX_SECTORS (DM_SM_METADATA_MAX_BLOCKS * DM_SM_METADATA_BLOCK_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)  * Unfortunately we have to use two-phase construction due to the cycle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)  * between the tm and sm.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct dm_space_map *dm_sm_metadata_init(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)  * Create a fresh space map.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) int dm_sm_metadata_create(struct dm_space_map *sm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 			  struct dm_transaction_manager *tm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 			  dm_block_t nr_blocks,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 			  dm_block_t superblock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)  * Open from a previously-recorded root.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) int dm_sm_metadata_open(struct dm_space_map *sm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 			struct dm_transaction_manager *tm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 			void *root_le, size_t len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #endif	/* DM_SPACE_MAP_METADATA_H */