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115 lines
3.3 KiB
115 lines
3.3 KiB
/*
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* irel.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_inode_reference {
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blk64_t block;
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__u16 offset;
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};
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struct ext2_inode_relocate_entry {
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ext2_ino_t new;
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ext2_ino_t orig;
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__u16 flags;
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__u16 max_refs;
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};
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typedef struct ext2_inode_relocation_table *ext2_irel;
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struct ext2_inode_relocation_table {
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__u32 magic;
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char *name;
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ext2_ino_t current;
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void *priv_data;
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/*
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* Add an inode relocation entry.
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*/
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errcode_t (*put)(ext2_irel irel, ext2_ino_t old,
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struct ext2_inode_relocate_entry *ent);
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/*
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* Get an inode relocation entry.
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*/
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errcode_t (*get)(ext2_irel irel, ext2_ino_t old,
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struct ext2_inode_relocate_entry *ent);
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/*
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* Get an inode relocation entry by its original inode number
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*/
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errcode_t (*get_by_orig)(ext2_irel irel, ext2_ino_t orig, ext2_ino_t *old,
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struct ext2_inode_relocate_entry *ent);
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/*
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* Initialize for iterating over the inode relocation entries.
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*/
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errcode_t (*start_iter)(ext2_irel irel);
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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_irel irel, ext2_ino_t *old,
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struct ext2_inode_relocate_entry *ent);
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/*
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* Add an inode reference (i.e., note the fact that a
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* particular block/offset contains a reference to an inode)
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*/
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errcode_t (*add_ref)(ext2_irel irel, ext2_ino_t ino,
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struct ext2_inode_reference *ref);
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/*
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* Initialize for iterating over the inode references for a
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* particular inode.
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*/
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errcode_t (*start_iter_ref)(ext2_irel irel, ext2_ino_t ino);
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/*
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* The iterator function for the inode references for an
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* inode. The references for only one inode can be interator
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* over at a time, as the iterator state is stored in ext2_irel.
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*/
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errcode_t (*next_ref)(ext2_irel irel,
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struct ext2_inode_reference *ref);
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/*
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* Move the inode relocation table from one inode number to
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* another. Note that the inode references also must move.
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*/
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errcode_t (*move)(ext2_irel irel, ext2_ino_t old, ext2_ino_t new);
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/*
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* Remove an inode relocation entry, along with all of the
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* inode references.
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*/
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errcode_t (*delete)(ext2_irel irel, ext2_ino_t old);
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/*
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* Free the inode relocation table.
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*/
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errcode_t (*free)(ext2_irel irel);
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};
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errcode_t ext2fs_irel_memarray_create(char *name, ext2_ino_t max_inode,
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ext2_irel *irel);
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#define ext2fs_irel_put(irel, old, ent) ((irel)->put((irel), old, ent))
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#define ext2fs_irel_get(irel, old, ent) ((irel)->get((irel), old, ent))
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#define ext2fs_irel_get_by_orig(irel, orig, old, ent) \
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((irel)->get_by_orig((irel), orig, old, ent))
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#define ext2fs_irel_start_iter(irel) ((irel)->start_iter((irel)))
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#define ext2fs_irel_next(irel, old, ent) ((irel)->next((irel), old, ent))
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#define ext2fs_irel_add_ref(irel, ino, ref) ((irel)->add_ref((irel), ino, ref))
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#define ext2fs_irel_start_iter_ref(irel, ino) ((irel)->start_iter_ref((irel), ino))
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#define ext2fs_irel_next_ref(irel, ref) ((irel)->next_ref((irel), ref))
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#define ext2fs_irel_move(irel, old, new) ((irel)->move((irel), old, new))
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#define ext2fs_irel_delete(irel, old) ((irel)->delete((irel), old))
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#define ext2fs_irel_free(irel) ((irel)->free((irel)))
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