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_H__ 19#define __XFS_DIR2_H__ 20 21struct uio; 22struct xfs_dabuf; 23struct xfs_da_args; 24struct xfs_dir2_put_args; 25struct xfs_bmap_free; 26struct xfs_inode; 27struct xfs_mount; 28struct xfs_trans; 29 30/* 31 * Directory version 2. 32 * There are 4 possible formats: 33 * shortform 34 * single block - data with embedded leaf at the end 35 * multiple data blocks, single leaf+freeindex block 36 * data blocks, node&leaf blocks (btree), freeindex blocks 37 * 38 * The shortform format is in xfs_dir2_sf.h. 39 * The single block format is in xfs_dir2_block.h. 40 * The data block format is in xfs_dir2_data.h. 41 * The leaf and freeindex block formats are in xfs_dir2_leaf.h. 42 * Node blocks are the same as the other version, in xfs_da_btree.h. 43 */ 44 45/* 46 * Byte offset in data block and shortform entry. 47 */ 48typedef __uint16_t xfs_dir2_data_off_t; 49#define NULLDATAOFF 0xffffU 50typedef uint xfs_dir2_data_aoff_t; /* argument form */ 51 52/* 53 * Directory block number (logical dirblk in file) 54 */ 55typedef __uint32_t xfs_dir2_db_t; 56 57/* 58 * Byte offset in a directory. 59 */ 60typedef xfs_off_t xfs_dir2_off_t; 61 62/* 63 * For getdents, argument struct for put routines. 64 */ 65typedef int (*xfs_dir2_put_t)(struct xfs_dir2_put_args *pa); 66typedef struct xfs_dir2_put_args { 67 xfs_off_t cook; /* cookie of (next) entry */ 68 xfs_intino_t ino; /* inode number */ 69 xfs_dirent_t *dbp; /* buffer pointer */ 70 char *name; /* directory entry name */ 71 int namelen; /* length of name */ 72 int done; /* output: set if value was stored */ 73 xfs_dir2_put_t put; /* put function ptr (i/o) */ 74 struct uio *uio; /* uio control structure */ 75} xfs_dir2_put_args_t; 76 77/* 78 * Generic directory interface routines 79 */ 80extern void xfs_dir_startup(void); 81extern void xfs_dir_mount(struct xfs_mount *mp); 82extern int xfs_dir_isempty(struct xfs_inode *dp); 83extern int xfs_dir_init(struct xfs_trans *tp, struct xfs_inode *dp, 84 struct xfs_inode *pdp); 85extern int xfs_dir_createname(struct xfs_trans *tp, struct xfs_inode *dp, 86 char *name, int namelen, xfs_ino_t inum, 87 xfs_fsblock_t *first, 88 struct xfs_bmap_free *flist, xfs_extlen_t tot); 89extern int xfs_dir_lookup(struct xfs_trans *tp, struct xfs_inode *dp, 90 char *name, int namelen, xfs_ino_t *inum); 91extern int xfs_dir_removename(struct xfs_trans *tp, struct xfs_inode *dp, 92 char *name, int namelen, xfs_ino_t ino, 93 xfs_fsblock_t *first, 94 struct xfs_bmap_free *flist, xfs_extlen_t tot); 95extern int xfs_dir_getdents(struct xfs_trans *tp, struct xfs_inode *dp, 96 uio_t *uio, int *eofp); 97extern int xfs_dir_replace(struct xfs_trans *tp, struct xfs_inode *dp, 98 char *name, int namelen, xfs_ino_t inum, 99 xfs_fsblock_t *first, 100 struct xfs_bmap_free *flist, xfs_extlen_t tot); 101extern int xfs_dir_canenter(struct xfs_trans *tp, struct xfs_inode *dp, 102 char *name, int namelen); 103extern int xfs_dir_ino_validate(struct xfs_mount *mp, xfs_ino_t ino); 104 105/* 106 * Utility routines for v2 directories. 107 */ 108extern int xfs_dir2_grow_inode(struct xfs_da_args *args, int space, 109 xfs_dir2_db_t *dbp); 110extern int xfs_dir2_isblock(struct xfs_trans *tp, struct xfs_inode *dp, 111 int *vp); 112extern int xfs_dir2_isleaf(struct xfs_trans *tp, struct xfs_inode *dp, 113 int *vp); 114extern int xfs_dir2_shrink_inode(struct xfs_da_args *args, xfs_dir2_db_t db, 115 struct xfs_dabuf *bp); 116 117#endif /* __XFS_DIR2_H__ */ 118