| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2000-2001 Silicon Graphics, Inc. All Rights Reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of version 2 of the GNU General Public License as |
| 6 | * published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it would be useful, but |
| 9 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| 11 | * |
| 12 | * Further, this software is distributed without any warranty that it is |
| 13 | * free of the rightful claim of any third person regarding infringement |
| 14 | * or the like. Any license provided herein, whether implied or |
| 15 | * otherwise, applies only to this software file. Patent licenses, if |
| 16 | * any, provided herein do not apply to combinations of this program with |
| 17 | * other software, or any other product whatsoever. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License along |
| 20 | * with this program; if not, write the Free Software Foundation, Inc., 59 |
| 21 | * Temple Place - Suite 330, Boston MA 02111-1307, USA. |
| 22 | * |
| 23 | * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, |
| 24 | * Mountain View, CA 94043, or: |
| 25 | * |
| 26 | * http://www.sgi.com |
| 27 | * |
| 28 | * For further information regarding this notice, see: |
| 29 | * |
| 30 | * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ |
| 31 | */ |
| 32 | #ifndef __XFS_DIR2_H__ |
| 33 | #define __XFS_DIR2_H__ |
| 34 | |
| 35 | struct uio; |
| 36 | struct xfs_dabuf; |
| 37 | struct xfs_da_args; |
| 38 | struct xfs_dir2_put_args; |
| 39 | struct xfs_inode; |
| 40 | struct xfs_trans; |
| 41 | |
| 42 | /* |
| 43 | * Directory version 2. |
| 44 | * There are 4 possible formats: |
| 45 | * shortform |
| 46 | * single block - data with embedded leaf at the end |
| 47 | * multiple data blocks, single leaf+freeindex block |
| 48 | * data blocks, node&leaf blocks (btree), freeindex blocks |
| 49 | * |
| 50 | * The shortform format is in xfs_dir2_sf.h. |
| 51 | * The single block format is in xfs_dir2_block.h. |
| 52 | * The data block format is in xfs_dir2_data.h. |
| 53 | * The leaf and freeindex block formats are in xfs_dir2_leaf.h. |
| 54 | * Node blocks are the same as the other version, in xfs_da_btree.h. |
| 55 | */ |
| 56 | |
| 57 | /* |
| 58 | * Byte offset in data block and shortform entry. |
| 59 | */ |
| 60 | typedef __uint16_t xfs_dir2_data_off_t; |
| 61 | #define NULLDATAOFF 0xffffU |
| 62 | typedef uint xfs_dir2_data_aoff_t; /* argument form */ |
| 63 | |
| 64 | /* |
| 65 | * Directory block number (logical dirblk in file) |
| 66 | */ |
| 67 | typedef __uint32_t xfs_dir2_db_t; |
| 68 | |
| 69 | /* |
| 70 | * Byte offset in a directory. |
| 71 | */ |
| 72 | typedef xfs_off_t xfs_dir2_off_t; |
| 73 | |
| 74 | /* |
| 75 | * For getdents, argument struct for put routines. |
| 76 | */ |
| 77 | typedef int (*xfs_dir2_put_t)(struct xfs_dir2_put_args *pa); |
| 78 | typedef struct xfs_dir2_put_args { |
| 79 | xfs_off_t cook; /* cookie of (next) entry */ |
| 80 | xfs_intino_t ino; /* inode number */ |
| 81 | struct xfs_dirent *dbp; /* buffer pointer */ |
| 82 | char *name; /* directory entry name */ |
| 83 | int namelen; /* length of name */ |
| 84 | int done; /* output: set if value was stored */ |
| 85 | xfs_dir2_put_t put; /* put function ptr (i/o) */ |
| 86 | struct uio *uio; /* uio control structure */ |
| 87 | } xfs_dir2_put_args_t; |
| 88 | |
| 89 | #define XFS_DIR_IS_V2(mp) ((mp)->m_dirversion == 2) |
| 90 | extern xfs_dirops_t xfsv2_dirops; |
| 91 | |
| 92 | /* |
| 93 | * Other interfaces used by the rest of the dir v2 code. |
| 94 | */ |
| 95 | extern int |
| 96 | xfs_dir2_grow_inode(struct xfs_da_args *args, int space, |
| 97 | xfs_dir2_db_t *dbp); |
| 98 | |
| 99 | extern int |
| 100 | xfs_dir2_isblock(struct xfs_trans *tp, struct xfs_inode *dp, int *vp); |
| 101 | |
| 102 | extern int |
| 103 | xfs_dir2_isleaf(struct xfs_trans *tp, struct xfs_inode *dp, int *vp); |
| 104 | |
| 105 | extern int |
| 106 | xfs_dir2_shrink_inode(struct xfs_da_args *args, xfs_dir2_db_t db, |
| 107 | struct xfs_dabuf *bp); |
| 108 | |
| 109 | #endif /* __XFS_DIR2_H__ */ |