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_BLOCK_H__ |
| 33 | #define __XFS_DIR2_BLOCK_H__ |
| 34 | |
| 35 | /* |
| 36 | * xfs_dir2_block.h |
| 37 | * Directory version 2, single block format structures |
| 38 | */ |
| 39 | |
| 40 | struct uio; |
| 41 | struct xfs_dabuf; |
| 42 | struct xfs_da_args; |
| 43 | struct xfs_dir2_data_hdr; |
| 44 | struct xfs_dir2_leaf_entry; |
| 45 | struct xfs_inode; |
| 46 | struct xfs_mount; |
| 47 | struct xfs_trans; |
| 48 | |
| 49 | /* |
| 50 | * The single block format is as follows: |
| 51 | * xfs_dir2_data_hdr_t structure |
| 52 | * xfs_dir2_data_entry_t and xfs_dir2_data_unused_t structures |
| 53 | * xfs_dir2_leaf_entry_t structures |
| 54 | * xfs_dir2_block_tail_t structure |
| 55 | */ |
| 56 | |
| 57 | #define XFS_DIR2_BLOCK_MAGIC 0x58443242 /* XD2B: for one block dirs */ |
| 58 | |
| 59 | typedef struct xfs_dir2_block_tail { |
| 60 | __uint32_t count; /* count of leaf entries */ |
| 61 | __uint32_t stale; /* count of stale lf entries */ |
| 62 | } xfs_dir2_block_tail_t; |
| 63 | |
| 64 | /* |
| 65 | * Generic single-block structure, for xfs_db. |
| 66 | */ |
| 67 | typedef struct xfs_dir2_block { |
| 68 | xfs_dir2_data_hdr_t hdr; /* magic XFS_DIR2_BLOCK_MAGIC */ |
| 69 | xfs_dir2_data_union_t u[1]; |
| 70 | xfs_dir2_leaf_entry_t leaf[1]; |
| 71 | xfs_dir2_block_tail_t tail; |
| 72 | } xfs_dir2_block_t; |
| 73 | |
| 74 | /* |
| 75 | * Pointer to the leaf header embedded in a data block (1-block format) |
| 76 | */ |
| 77 | #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_BLOCK_TAIL_P) |
| 78 | xfs_dir2_block_tail_t * |
| 79 | xfs_dir2_block_tail_p(struct xfs_mount *mp, xfs_dir2_block_t *block); |
| 80 | #define XFS_DIR2_BLOCK_TAIL_P(mp,block) xfs_dir2_block_tail_p(mp,block) |
| 81 | #else |
| 82 | #define XFS_DIR2_BLOCK_TAIL_P(mp,block) \ |
| 83 | (((xfs_dir2_block_tail_t *)((char *)(block) + (mp)->m_dirblksize)) - 1) |
| 84 | #endif |
| 85 | |
| 86 | /* |
| 87 | * Pointer to the leaf entries embedded in a data block (1-block format) |
| 88 | */ |
| 89 | #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_BLOCK_LEAF_P) |
| 90 | struct xfs_dir2_leaf_entry *xfs_dir2_block_leaf_p(xfs_dir2_block_tail_t *btp); |
| 91 | #define XFS_DIR2_BLOCK_LEAF_P(btp) \ |
| 92 | xfs_dir2_block_leaf_p(btp) |
| 93 | #else |
| 94 | #define XFS_DIR2_BLOCK_LEAF_P(btp) \ |
| 95 | (((struct xfs_dir2_leaf_entry *)(btp)) - INT_GET((btp)->count, ARCH_CONVERT)) |
| 96 | #endif |
| 97 | |
| 98 | /* |
| 99 | * Function declarations. |
| 100 | */ |
| 101 | |
| 102 | extern int |
| 103 | xfs_dir2_block_addname(struct xfs_da_args *args); |
| 104 | |
| 105 | extern int |
| 106 | xfs_dir2_block_getdents(struct xfs_trans *tp, struct xfs_inode *dp, |
| 107 | struct uio *uio, int *eofp, struct xfs_dirent *dbp, |
| 108 | xfs_dir2_put_t put); |
| 109 | |
| 110 | extern int |
| 111 | xfs_dir2_block_lookup(struct xfs_da_args *args); |
| 112 | |
| 113 | extern int |
| 114 | xfs_dir2_block_removename(struct xfs_da_args *args); |
| 115 | |
| 116 | extern int |
| 117 | xfs_dir2_block_replace(struct xfs_da_args *args); |
| 118 | |
| 119 | extern int |
| 120 | xfs_dir2_leaf_to_block(struct xfs_da_args *args, struct xfs_dabuf *lbp, |
| 121 | struct xfs_dabuf *dbp); |
| 122 | |
| 123 | extern int |
| 124 | xfs_dir2_sf_to_block(struct xfs_da_args *args); |
| 125 | |
| 126 | #endif /* __XFS_DIR2_BLOCK_H__ */ |