1/* 2 * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * 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. 13 * 14 * 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 17 */ 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 { 46 __be32 count; /* count of leaf entries */ 47 __be32 stale; /* count of stale lf entries */ 48} 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 */ 63static 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} 69 70/* 71 * Pointer to the leaf entries embedded in a data block (1-block format) 72 */ 73static inline struct xfs_dir2_leaf_entry * 74xfs_dir2_block_leaf_p(xfs_dir2_block_tail_t *btp) 75{ 76 return ((struct xfs_dir2_leaf_entry *)btp) - be32_to_cpu(btp->count); 77} 78 79/* 80 * Function declarations. 81 */ 82extern int xfs_dir2_block_addname(struct xfs_da_args *args); 83extern int xfs_dir2_block_getdents(struct xfs_inode *dp, void *dirent, 84 xfs_off_t *offset, filldir_t filldir); 85extern 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); 91 92#endif /* __XFS_DIR2_BLOCK_H__ */ 93