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/*
* irel.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_inode_reference {
blk_t block;
__u16 offset;
};
struct ext2_inode_relocate_entry {
ext2_ino_t new;
ext2_ino_t orig;
__u16 flags;
__u16 max_refs;
};
typedef struct ext2_inode_relocation_table *ext2_irel;
struct ext2_inode_relocation_table {
__u32 magic;
char *name;
ext2_ino_t current;
void *priv_data;
/*
* Add an inode relocation entry.
*/
errcode_t (*put)(ext2_irel irel, ext2_ino_t old,
struct ext2_inode_relocate_entry *ent);
/*
* Get an inode relocation entry.
*/
errcode_t (*get)(ext2_irel irel, ext2_ino_t old,
struct ext2_inode_relocate_entry *ent);
/*
* Get an inode relocation entry by its original inode number
*/
errcode_t (*get_by_orig)(ext2_irel irel, ext2_ino_t orig, ext2_ino_t *old,
struct ext2_inode_relocate_entry *ent);
/*
* Initialize for iterating over the inode relocation entries.
*/
errcode_t (*start_iter)(ext2_irel irel);
/*
* The iterator function for the inode relocation entries.
* Returns an inode number of 0 when out of entries.
*/
errcode_t (*next)(ext2_irel irel, ext2_ino_t *old,
struct ext2_inode_relocate_entry *ent);
/*
* Add an inode reference (i.e., note the fact that a
* particular block/offset contains a reference to an inode)
*/
errcode_t (*add_ref)(ext2_irel irel, ext2_ino_t ino,
struct ext2_inode_reference *ref);
/*
* Initialize for iterating over the inode references for a
* particular inode.
*/
errcode_t (*start_iter_ref)(ext2_irel irel, ext2_ino_t ino);
/*
* The iterator function for the inode references for an
* inode. The references for only one inode can be interator
* over at a time, as the iterator state is stored in ext2_irel.
*/
errcode_t (*next_ref)(ext2_irel irel,
struct ext2_inode_reference *ref);
/*
* Move the inode relocation table from one inode number to
* another. Note that the inode references also must move.
*/
errcode_t (*move)(ext2_irel irel, ext2_ino_t old, ext2_ino_t new);
/*
* Remove an inode relocation entry, along with all of the
* inode references.
*/
errcode_t (*delete)(ext2_irel irel, ext2_ino_t old);
/*
* Free the inode relocation table.
*/
errcode_t (*free)(ext2_irel irel);
};
errcode_t ext2fs_irel_memarray_create(char *name, ext2_ino_t max_inode,
ext2_irel *irel);
#define ext2fs_irel_put(irel, old, ent) ((irel)->put((irel), old, ent))
#define ext2fs_irel_get(irel, old, ent) ((irel)->get((irel), old, ent))
#define ext2fs_irel_get_by_orig(irel, orig, old, ent) \
((irel)->get_by_orig((irel), orig, old, ent))
#define ext2fs_irel_start_iter(irel) ((irel)->start_iter((irel)))
#define ext2fs_irel_next(irel, old, ent) ((irel)->next((irel), old, ent))
#define ext2fs_irel_add_ref(irel, ino, ref) ((irel)->add_ref((irel), ino, ref))
#define ext2fs_irel_start_iter_ref(irel, ino) ((irel)->start_iter_ref((irel), ino))
#define ext2fs_irel_next_ref(irel, ref) ((irel)->next_ref((irel), ref))
#define ext2fs_irel_move(irel, old, new) ((irel)->move((irel), old, new))
#define ext2fs_irel_delete(irel, old) ((irel)->delete((irel), old))
#define ext2fs_irel_free(irel) ((irel)->free((irel)))
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