projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 | 1 | /* |
| 7b718769 NS |
2 | * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc. |
| 3 | * All Rights Reserved. | |
| 1da177e4 | 4 | * |
| 7b718769 NS |
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 | |
| 1da177e4 LT |
7 | * published by the Free Software Foundation. |
| 8 | * | |
| 7b718769 NS |
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. | |
| 1da177e4 | 13 | * |
| 7b718769 NS |
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 | |
| 1da177e4 LT |
17 | */ |
| 18 | #ifndef __XFS_DIR2_BLOCK_H__ | |
| 19 | #define __XFS_DIR2_BLOCK_H__ | |
| 20 | ||
| 21 | /* | |
| a64b0417 CH |
22 | * Directory version 2, single block format structures. |
| 23 | * | |
| 24 | * The single block format looks like the following drawing on disk: | |
| 25 | * | |
| 26 | * +-------------------------------------------------+ | |
| 27 | * | xfs_dir2_data_hdr_t | | |
| 28 | * +-------------------------------------------------+ | |
| 29 | * | xfs_dir2_data_entry_t OR xfs_dir2_data_unused_t | | |
| 30 | * | xfs_dir2_data_entry_t OR xfs_dir2_data_unused_t | | |
| 31 | * | xfs_dir2_data_entry_t OR xfs_dir2_data_unused_t | | |
| 32 | * | ... | | |
| 33 | * +-------------------------------------------------+ | |
| 34 | * | unused space | | |
| 35 | * +-------------------------------------------------+ | |
| 36 | * | ... | | |
| 37 | * | xfs_dir2_leaf_entry_t | | |
| 38 | * | xfs_dir2_leaf_entry_t | | |
| 39 | * +-------------------------------------------------+ | |
| 40 | * | xfs_dir2_block_tail_t | | |
| 41 | * +-------------------------------------------------+ | |
| 42 | * | |
| 43 | * As all the entries are variable size structures the accessors in this | |
| 44 | * file and xfs_dir2_data.h should be used to iterate over them. | |
| 1da177e4 | 45 | */ |
| 1da177e4 LT |
46 | struct uio; |
| 47 | struct xfs_dabuf; | |
| 48 | struct xfs_da_args; | |
| 49 | struct xfs_dir2_data_hdr; | |
| 50 | struct xfs_dir2_leaf_entry; | |
| 51 | struct xfs_inode; | |
| 52 | struct xfs_mount; | |
| 53 | struct xfs_trans; | |
| 54 | ||
| 1da177e4 LT |
55 | #define XFS_DIR2_BLOCK_MAGIC 0x58443242 /* XD2B: for one block dirs */ |
| 56 | ||
| 57 | typedef struct xfs_dir2_block_tail { | |
| e922fffa NS |
58 | __be32 count; /* count of leaf entries */ |
| 59 | __be32 stale; /* count of stale lf entries */ | |
| 1da177e4 LT |
60 | } xfs_dir2_block_tail_t; |
| 61 | ||
| 1da177e4 LT |
62 | /* |
| 63 | * Pointer to the leaf header embedded in a data block (1-block format) | |
| 64 | */ | |
| a844f451 | 65 | static inline xfs_dir2_block_tail_t * |
| 4f6ae1a4 | 66 | xfs_dir2_block_tail_p(struct xfs_mount *mp, xfs_dir2_data_hdr_t *hdr) |
| a844f451 | 67 | { |
| 4f6ae1a4 | 68 | return ((xfs_dir2_block_tail_t *)((char *)hdr + mp->m_dirblksize)) - 1; |
| a844f451 | 69 | } |
| 1da177e4 LT |
70 | |
| 71 | /* | |
| 72 | * Pointer to the leaf entries embedded in a data block (1-block format) | |
| 73 | */ | |
| a844f451 NS |
74 | static inline struct xfs_dir2_leaf_entry * |
| 75 | xfs_dir2_block_leaf_p(xfs_dir2_block_tail_t *btp) | |
| 76 | { | |
| e922fffa | 77 | return ((struct xfs_dir2_leaf_entry *)btp) - be32_to_cpu(btp->count); |
| a844f451 | 78 | } |
| 1da177e4 LT |
79 | |
| 80 | /* | |
| 81 | * Function declarations. | |
| 82 | */ | |
| a844f451 | 83 | extern int xfs_dir2_block_addname(struct xfs_da_args *args); |
| 051e7cd4 CH |
84 | extern int xfs_dir2_block_getdents(struct xfs_inode *dp, void *dirent, |
| 85 | xfs_off_t *offset, filldir_t filldir); | |
| a844f451 NS |
86 | extern int xfs_dir2_block_lookup(struct xfs_da_args *args); |
| 87 | extern int xfs_dir2_block_removename(struct xfs_da_args *args); | |
| 88 | extern int xfs_dir2_block_replace(struct xfs_da_args *args); | |
| 89 | extern int xfs_dir2_leaf_to_block(struct xfs_da_args *args, | |
| 90 | struct xfs_dabuf *lbp, struct xfs_dabuf *dbp); | |
| 91 | extern int xfs_dir2_sf_to_block(struct xfs_da_args *args); | |
| 1da177e4 LT |
92 | |
| 93 | #endif /* __XFS_DIR2_BLOCK_H__ */ |