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/* vi: set sw=4 ts=4: */
/*
* brel.h
*
* Copyright (C) 1996, 1997 Theodore Ts'o.
*
* %Begin-Header%
* This file may be redistributed under the terms of the GNU Public
* License.
* %End-Header%
*/
struct ext2_block_relocate_entry {
blk_t new;
__s16 offset;
__u16 flags;
union {
blk_t block_ref;
ext2_ino_t inode_ref;
} owner;
};
#define RELOCATE_TYPE_REF 0x0007
#define RELOCATE_BLOCK_REF 0x0001
#define RELOCATE_INODE_REF 0x0002
typedef struct ext2_block_relocation_table *ext2_brel;
struct ext2_block_relocation_table {
__u32 magic;
char *name;
blk_t current;
void *priv_data;
/*
* Add a block relocation entry.
*/
errcode_t (*put)(ext2_brel brel, blk_t old,
struct ext2_block_relocate_entry *ent);
/*
* Get a block relocation entry.
*/
errcode_t (*get)(ext2_brel brel, blk_t old,
struct ext2_block_relocate_entry *ent);
/*
* Initialize for iterating over the block relocation entries.
*/
errcode_t (*start_iter)(ext2_brel brel);
/*
* The iterator function for the inode relocation entries.
* Returns an inode number of 0 when out of entries.
*/
errcode_t (*next)(ext2_brel brel, blk_t *old,
struct ext2_block_relocate_entry *ent);
/*
* Move the inode relocation table from one block number to
* another.
*/
errcode_t (*move)(ext2_brel brel, blk_t old, blk_t new);
/*
* Remove a block relocation entry.
*/
errcode_t (*delete)(ext2_brel brel, blk_t old);
/*
* Free the block relocation table.
*/
errcode_t (*free)(ext2_brel brel);
};
errcode_t ext2fs_brel_memarray_create(char *name, blk_t max_block,
ext2_brel *brel);
#define ext2fs_brel_put(brel, old, ent) ((brel)->put((brel), old, ent))
#define ext2fs_brel_get(brel, old, ent) ((brel)->get((brel), old, ent))
#define ext2fs_brel_start_iter(brel) ((brel)->start_iter((brel)))
#define ext2fs_brel_next(brel, old, ent) ((brel)->next((brel), old, ent))
#define ext2fs_brel_move(brel, old, new) ((brel)->move((brel), old, new))
#define ext2fs_brel_delete(brel, old) ((brel)->delete((brel), old))
#define ext2fs_brel_free(brel) ((brel)->free((brel)))
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