Gitiles
Code Review Sign In
gerrit.nordix.org / codeaurora / busybox / 8c35d65c43216bb840326ac7476a180e2ae36fe9 / . / e2fsprogs / ext2fs / irel.h
blob: 91d1d89d5ff8be4a79f28896cfea78a782e1361d [file] [log] [blame]
"Robert P. J. Day"63fc1a92006-07-02 19:47:05 +0000[diff] [blame]1/* vi: set sw=4 ts=4: */
Mike Frysinger1fd98e02005-05-09 22:10:42 +0000[diff] [blame]2/*
3 * irel.h
Tim Rikerc1ef7bd2006-01-25 00:08:53 +0000[diff] [blame]4 *
Mike Frysinger1fd98e02005-05-09 22:10:42 +0000[diff] [blame]5 * Copyright (C) 1996, 1997 Theodore Ts'o.
6 *
7 * %Begin-Header%
8 * This file may be redistributed under the terms of the GNU Public
9 * License.
10 * %End-Header%
11 */
12
13struct ext2_inode_reference {
14 blk_t block;
15 __u16 offset;
16};
17
18struct ext2_inode_relocate_entry {
19 ext2_ino_t new;
20 ext2_ino_t orig;
21 __u16 flags;
22 __u16 max_refs;
23};
24
25typedef struct ext2_inode_relocation_table *ext2_irel;
26
27struct ext2_inode_relocation_table {
28 __u32 magic;
29 char *name;
30 ext2_ino_t current;
31 void *priv_data;
32
33 /*
34 * Add an inode relocation entry.
35 */
36 errcode_t (*put)(ext2_irel irel, ext2_ino_t old,
37 struct ext2_inode_relocate_entry *ent);
38 /*
39 * Get an inode relocation entry.
40 */
41 errcode_t (*get)(ext2_irel irel, ext2_ino_t old,
42 struct ext2_inode_relocate_entry *ent);
43
44 /*
45 * Get an inode relocation entry by its original inode number
46 */
47 errcode_t (*get_by_orig)(ext2_irel irel, ext2_ino_t orig, ext2_ino_t *old,
48 struct ext2_inode_relocate_entry *ent);
49
50 /*
51 * Initialize for iterating over the inode relocation entries.
52 */
53 errcode_t (*start_iter)(ext2_irel irel);
54
55 /*
56 * The iterator function for the inode relocation entries.
57 * Returns an inode number of 0 when out of entries.
58 */
59 errcode_t (*next)(ext2_irel irel, ext2_ino_t *old,
60 struct ext2_inode_relocate_entry *ent);
61
62 /*
63 * Add an inode reference (i.e., note the fact that a
64 * particular block/offset contains a reference to an inode)
65 */
66 errcode_t (*add_ref)(ext2_irel irel, ext2_ino_t ino,
67 struct ext2_inode_reference *ref);
68
69 /*
70 * Initialize for iterating over the inode references for a
71 * particular inode.
72 */
73 errcode_t (*start_iter_ref)(ext2_irel irel, ext2_ino_t ino);
74
75 /*
76 * The iterator function for the inode references for an
77 * inode. The references for only one inode can be interator
78 * over at a time, as the iterator state is stored in ext2_irel.
79 */
80 errcode_t (*next_ref)(ext2_irel irel,
81 struct ext2_inode_reference *ref);
82
83 /*
84 * Move the inode relocation table from one inode number to
85 * another. Note that the inode references also must move.
86 */
87 errcode_t (*move)(ext2_irel irel, ext2_ino_t old, ext2_ino_t new);
88
89 /*
90 * Remove an inode relocation entry, along with all of the
91 * inode references.
92 */
93 errcode_t (*delete)(ext2_irel irel, ext2_ino_t old);
94
95 /*
96 * Free the inode relocation table.
97 */
98 errcode_t (*free)(ext2_irel irel);
99};
100
101errcode_t ext2fs_irel_memarray_create(char *name, ext2_ino_t max_inode,
102 ext2_irel *irel);
103
104#define ext2fs_irel_put(irel, old, ent) ((irel)->put((irel), old, ent))
105#define ext2fs_irel_get(irel, old, ent) ((irel)->get((irel), old, ent))
106#define ext2fs_irel_get_by_orig(irel, orig, old, ent) \
107 ((irel)->get_by_orig((irel), orig, old, ent))
108#define ext2fs_irel_start_iter(irel) ((irel)->start_iter((irel)))
109#define ext2fs_irel_next(irel, old, ent) ((irel)->next((irel), old, ent))
110#define ext2fs_irel_add_ref(irel, ino, ref) ((irel)->add_ref((irel), ino, ref))
111#define ext2fs_irel_start_iter_ref(irel, ino) ((irel)->start_iter_ref((irel), ino))
112#define ext2fs_irel_next_ref(irel, ref) ((irel)->next_ref((irel), ref))
113#define ext2fs_irel_move(irel, old, new) ((irel)->move((irel), old, new))
114#define ext2fs_irel_delete(irel, old) ((irel)->delete((irel), old))
115#define ext2fs_irel_free(irel) ((irel)->free((irel)))