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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Nathan Scott7b718762005-11-02 14:58:39 +11002 * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
Nathan Scott7b718762005-11-02 14:58:39 +11005 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * published by the Free Software Foundation.
8 *
Nathan Scott7b718762005-11-02 14:58:39 +11009 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 *
Nathan Scott7b718762005-11-02 14:58:39 +110014 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 */
18#ifndef __XFS_DIR2_BLOCK_H__
19#define __XFS_DIR2_BLOCK_H__
20
21/*
22 * xfs_dir2_block.h
23 * Directory version 2, single block format structures
24 */
25
26struct uio;
27struct xfs_dabuf;
28struct xfs_da_args;
29struct xfs_dir2_data_hdr;
30struct xfs_dir2_leaf_entry;
31struct xfs_inode;
32struct xfs_mount;
33struct xfs_trans;
34
35/*
36 * The single block format is as follows:
37 * xfs_dir2_data_hdr_t structure
38 * xfs_dir2_data_entry_t and xfs_dir2_data_unused_t structures
39 * xfs_dir2_leaf_entry_t structures
40 * xfs_dir2_block_tail_t structure
41 */
42
43#define XFS_DIR2_BLOCK_MAGIC 0x58443242 /* XD2B: for one block dirs */
44
45typedef struct xfs_dir2_block_tail {
Nathan Scotte922fff2006-03-17 17:27:56 +110046 __be32 count; /* count of leaf entries */
47 __be32 stale; /* count of stale lf entries */
Linus Torvalds1da177e2005-04-16 15:20:36 -070048} xfs_dir2_block_tail_t;
49
50/*
51 * Generic single-block structure, for xfs_db.
52 */
53typedef struct xfs_dir2_block {
54 xfs_dir2_data_hdr_t hdr; /* magic XFS_DIR2_BLOCK_MAGIC */
55 xfs_dir2_data_union_t u[1];
56 xfs_dir2_leaf_entry_t leaf[1];
57 xfs_dir2_block_tail_t tail;
58} xfs_dir2_block_t;
59
60/*
61 * Pointer to the leaf header embedded in a data block (1-block format)
62 */
Nathan Scotta844f452005-11-02 14:38:42 +110063static inline xfs_dir2_block_tail_t *
64xfs_dir2_block_tail_p(struct xfs_mount *mp, xfs_dir2_block_t *block)
65{
66 return (((xfs_dir2_block_tail_t *)
67 ((char *)(block) + (mp)->m_dirblksize)) - 1);
68}
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
70/*
71 * Pointer to the leaf entries embedded in a data block (1-block format)
72 */
Nathan Scotta844f452005-11-02 14:38:42 +110073static inline struct xfs_dir2_leaf_entry *
74xfs_dir2_block_leaf_p(xfs_dir2_block_tail_t *btp)
75{
Nathan Scotte922fff2006-03-17 17:27:56 +110076 return ((struct xfs_dir2_leaf_entry *)btp) - be32_to_cpu(btp->count);
Nathan Scotta844f452005-11-02 14:38:42 +110077}
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
79/*
80 * Function declarations.
81 */
Nathan Scotta844f452005-11-02 14:38:42 +110082extern int xfs_dir2_block_addname(struct xfs_da_args *args);
Christoph Hellwig051e7cd2007-08-28 13:58:24 +100083extern int xfs_dir2_block_getdents(struct xfs_inode *dp, void *dirent,
84 xfs_off_t *offset, filldir_t filldir);
Nathan Scotta844f452005-11-02 14:38:42 +110085extern int xfs_dir2_block_lookup(struct xfs_da_args *args);
86extern int xfs_dir2_block_removename(struct xfs_da_args *args);
87extern int xfs_dir2_block_replace(struct xfs_da_args *args);
88extern int xfs_dir2_leaf_to_block(struct xfs_da_args *args,
89 struct xfs_dabuf *lbp, struct xfs_dabuf *dbp);
90extern int xfs_dir2_sf_to_block(struct xfs_da_args *args);
Linus Torvalds1da177e2005-04-16 15:20:36 -070091
92#endif /* __XFS_DIR2_BLOCK_H__ */