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 */ 63#define XFS_DIR2_BLOCK_TAIL_P(mp,block) xfs_dir2_block_tail_p(mp,block) 64static inline xfs_dir2_block_tail_t * 65xfs_dir2_block_tail_p(struct xfs_mount *mp, xfs_dir2_block_t *block) 66{ 67 return (((xfs_dir2_block_tail_t *) 68 ((char *)(block) + (mp)->m_dirblksize)) - 1); 69} 70 71/* 72 * Pointer to the leaf entries embedded in a data block (1-block format) 73 */ 74#define XFS_DIR2_BLOCK_LEAF_P(btp) xfs_dir2_block_leaf_p(btp) 75static inline struct xfs_dir2_leaf_entry * 76xfs_dir2_block_leaf_p(xfs_dir2_block_tail_t *btp) 77{ 78 return ((struct xfs_dir2_leaf_entry *)btp) - be32_to_cpu(btp->count); 79} 80 81/* 82 * Function declarations. 83 */ 84extern int xfs_dir2_block_addname(struct xfs_da_args *args); 85extern int xfs_dir2_block_getdents(struct xfs_trans *tp, struct xfs_inode *dp, 86 struct uio *uio, int *eofp, 87 struct xfs_dirent *dbp, xfs_dir2_put_t put); 88extern int xfs_dir2_block_lookup(struct xfs_da_args *args); 89extern int xfs_dir2_block_removename(struct xfs_da_args *args); 90extern int xfs_dir2_block_replace(struct xfs_da_args *args); 91extern int xfs_dir2_leaf_to_block(struct xfs_da_args *args, 92 struct xfs_dabuf *lbp, struct xfs_dabuf *dbp); 93extern int xfs_dir2_sf_to_block(struct xfs_da_args *args); 94 95#endif /* __XFS_DIR2_BLOCK_H__ */ 96