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gerrit.nordix.org / codeaurora / busybox / c1ef7bdd8d002ae0889efcf883d0e1b7faa938d4 / . / e2fsprogs / ext2fs / irel.h
blob: 45e031bebe2444c089c89b8bce56b3fed15a4fbc [file] [log] [blame]
Mike Frysinger1fd98e02005-05-09 22:10:42 +0000[diff] [blame]1/*
2 * irel.h
Tim Rikerc1ef7bd2006-01-25 00:08:53 +0000[diff] [blame^]3 *
Mike Frysinger1fd98e02005-05-09 22:10:42 +0000[diff] [blame]4 * Copyright (C) 1996, 1997 Theodore Ts'o.
5 *
6 * %Begin-Header%
7 * This file may be redistributed under the terms of the GNU Public
8 * License.
9 * %End-Header%
10 */
11
12struct ext2_inode_reference {
13 blk_t block;
14 __u16 offset;
15};
16
17struct ext2_inode_relocate_entry {
18 ext2_ino_t new;
19 ext2_ino_t orig;
20 __u16 flags;
21 __u16 max_refs;
22};
23
24typedef struct ext2_inode_relocation_table *ext2_irel;
25
26struct ext2_inode_relocation_table {
27 __u32 magic;
28 char *name;
29 ext2_ino_t current;
30 void *priv_data;
31
32 /*
33 * Add an inode relocation entry.
34 */
35 errcode_t (*put)(ext2_irel irel, ext2_ino_t old,
36 struct ext2_inode_relocate_entry *ent);
37 /*
38 * Get an inode relocation entry.
39 */
40 errcode_t (*get)(ext2_irel irel, ext2_ino_t old,
41 struct ext2_inode_relocate_entry *ent);
42
43 /*
44 * Get an inode relocation entry by its original inode number
45 */
46 errcode_t (*get_by_orig)(ext2_irel irel, ext2_ino_t orig, ext2_ino_t *old,
47 struct ext2_inode_relocate_entry *ent);
48
49 /*
50 * Initialize for iterating over the inode relocation entries.
51 */
52 errcode_t (*start_iter)(ext2_irel irel);
53
54 /*
55 * The iterator function for the inode relocation entries.
56 * Returns an inode number of 0 when out of entries.
57 */
58 errcode_t (*next)(ext2_irel irel, ext2_ino_t *old,
59 struct ext2_inode_relocate_entry *ent);
60
61 /*
62 * Add an inode reference (i.e., note the fact that a
63 * particular block/offset contains a reference to an inode)
64 */
65 errcode_t (*add_ref)(ext2_irel irel, ext2_ino_t ino,
66 struct ext2_inode_reference *ref);
67
68 /*
69 * Initialize for iterating over the inode references for a
70 * particular inode.
71 */
72 errcode_t (*start_iter_ref)(ext2_irel irel, ext2_ino_t ino);
73
74 /*
75 * The iterator function for the inode references for an
76 * inode. The references for only one inode can be interator
77 * over at a time, as the iterator state is stored in ext2_irel.
78 */
79 errcode_t (*next_ref)(ext2_irel irel,
80 struct ext2_inode_reference *ref);
81
82 /*
83 * Move the inode relocation table from one inode number to
84 * another. Note that the inode references also must move.
85 */
86 errcode_t (*move)(ext2_irel irel, ext2_ino_t old, ext2_ino_t new);
87
88 /*
89 * Remove an inode relocation entry, along with all of the
90 * inode references.
91 */
92 errcode_t (*delete)(ext2_irel irel, ext2_ino_t old);
93
94 /*
95 * Free the inode relocation table.
96 */
97 errcode_t (*free)(ext2_irel irel);
98};
99
100errcode_t ext2fs_irel_memarray_create(char *name, ext2_ino_t max_inode,
101 ext2_irel *irel);
102
103#define ext2fs_irel_put(irel, old, ent) ((irel)->put((irel), old, ent))
104#define ext2fs_irel_get(irel, old, ent) ((irel)->get((irel), old, ent))
105#define ext2fs_irel_get_by_orig(irel, orig, old, ent) \
106 ((irel)->get_by_orig((irel), orig, old, ent))
107#define ext2fs_irel_start_iter(irel) ((irel)->start_iter((irel)))
108#define ext2fs_irel_next(irel, old, ent) ((irel)->next((irel), old, ent))
109#define ext2fs_irel_add_ref(irel, ino, ref) ((irel)->add_ref((irel), ino, ref))
110#define ext2fs_irel_start_iter_ref(irel, ino) ((irel)->start_iter_ref((irel), ino))
111#define ext2fs_irel_next_ref(irel, ref) ((irel)->next_ref((irel), ref))
112#define ext2fs_irel_move(irel, old, new) ((irel)->move((irel), old, new))
113#define ext2fs_irel_delete(irel, old) ((irel)->delete((irel), old))
114#define ext2fs_irel_free(irel) ((irel)->free((irel)))