/*
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* brel.h
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*
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* Copyright (C) 1996, 1997 Theodore Ts'o.
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*
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* %Begin-Header%
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* This file may be redistributed under the terms of the GNU Library
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* General Public License, version 2.
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* %End-Header%
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*/
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struct ext2_block_relocate_entry {
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blk64_t new;
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__s16 offset;
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__u16 flags;
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union {
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blk64_t block_ref;
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ext2_ino_t inode_ref;
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} owner;
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};
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#define RELOCATE_TYPE_REF 0x0007
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#define RELOCATE_BLOCK_REF 0x0001
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#define RELOCATE_INODE_REF 0x0002
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typedef struct ext2_block_relocation_table *ext2_brel;
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struct ext2_block_relocation_table {
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__u32 magic;
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char *name;
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blk64_t current;
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void *priv_data;
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/*
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* Add a block relocation entry.
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*/
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errcode_t (*put)(ext2_brel brel, blk64_t old,
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struct ext2_block_relocate_entry *ent);
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/*
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* Get a block relocation entry.
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*/
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errcode_t (*get)(ext2_brel brel, blk64_t old,
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struct ext2_block_relocate_entry *ent);
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/*
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* Initialize for iterating over the block relocation entries.
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*/
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errcode_t (*start_iter)(ext2_brel brel);
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/*
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* The iterator function for the inode relocation entries.
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* Returns an inode number of 0 when out of entries.
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*/
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errcode_t (*next)(ext2_brel brel, blk64_t *old,
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struct ext2_block_relocate_entry *ent);
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/*
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* Move the inode relocation table from one block number to
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* another.
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*/
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errcode_t (*move)(ext2_brel brel, blk64_t old, blk_t new);
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/*
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* Remove a block relocation entry.
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*/
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errcode_t (*delete)(ext2_brel brel, blk64_t old);
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/*
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* Free the block relocation table.
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*/
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errcode_t (*free)(ext2_brel brel);
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};
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errcode_t ext2fs_brel_memarray_create(char *name, blk64_t max_block,
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ext2_brel *brel);
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#define ext2fs_brel_put(brel, old, ent) ((brel)->put((brel), old, ent))
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#define ext2fs_brel_get(brel, old, ent) ((brel)->get((brel), old, ent))
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#define ext2fs_brel_start_iter(brel) ((brel)->start_iter((brel)))
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#define ext2fs_brel_next(brel, old, ent) ((brel)->next((brel), old, ent))
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#define ext2fs_brel_move(brel, old, new) ((brel)->move((brel), old, new))
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#define ext2fs_brel_delete(brel, old) ((brel)->delete((brel), old))
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#define ext2fs_brel_free(brel) ((brel)->free((brel)))
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