118 lines
3.9 KiB
C
118 lines
3.9 KiB
C
/*
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* Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef __XFS_DIR2_H__
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#define __XFS_DIR2_H__
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struct uio;
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struct xfs_dabuf;
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struct xfs_da_args;
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struct xfs_dir2_put_args;
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struct xfs_bmap_free;
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struct xfs_inode;
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struct xfs_mount;
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struct xfs_trans;
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/*
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* Directory version 2.
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* There are 4 possible formats:
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* shortform
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* single block - data with embedded leaf at the end
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* multiple data blocks, single leaf+freeindex block
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* data blocks, node&leaf blocks (btree), freeindex blocks
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*
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* The shortform format is in xfs_dir2_sf.h.
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* The single block format is in xfs_dir2_block.h.
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* The data block format is in xfs_dir2_data.h.
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* The leaf and freeindex block formats are in xfs_dir2_leaf.h.
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* Node blocks are the same as the other version, in xfs_da_btree.h.
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*/
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/*
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* Byte offset in data block and shortform entry.
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*/
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typedef __uint16_t xfs_dir2_data_off_t;
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#define NULLDATAOFF 0xffffU
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typedef uint xfs_dir2_data_aoff_t; /* argument form */
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/*
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* Directory block number (logical dirblk in file)
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*/
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typedef __uint32_t xfs_dir2_db_t;
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/*
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* Byte offset in a directory.
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*/
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typedef xfs_off_t xfs_dir2_off_t;
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/*
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* For getdents, argument struct for put routines.
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*/
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typedef int (*xfs_dir2_put_t)(struct xfs_dir2_put_args *pa);
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typedef struct xfs_dir2_put_args {
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xfs_off_t cook; /* cookie of (next) entry */
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xfs_intino_t ino; /* inode number */
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xfs_dirent_t *dbp; /* buffer pointer */
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char *name; /* directory entry name */
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int namelen; /* length of name */
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int done; /* output: set if value was stored */
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xfs_dir2_put_t put; /* put function ptr (i/o) */
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struct uio *uio; /* uio control structure */
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} xfs_dir2_put_args_t;
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/*
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* Generic directory interface routines
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*/
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extern void xfs_dir_startup(void);
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extern void xfs_dir_mount(struct xfs_mount *mp);
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extern int xfs_dir_isempty(struct xfs_inode *dp);
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extern int xfs_dir_init(struct xfs_trans *tp, struct xfs_inode *dp,
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struct xfs_inode *pdp);
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extern int xfs_dir_createname(struct xfs_trans *tp, struct xfs_inode *dp,
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char *name, int namelen, xfs_ino_t inum,
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xfs_fsblock_t *first,
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struct xfs_bmap_free *flist, xfs_extlen_t tot);
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extern int xfs_dir_lookup(struct xfs_trans *tp, struct xfs_inode *dp,
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char *name, int namelen, xfs_ino_t *inum);
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extern int xfs_dir_removename(struct xfs_trans *tp, struct xfs_inode *dp,
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char *name, int namelen, xfs_ino_t ino,
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xfs_fsblock_t *first,
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struct xfs_bmap_free *flist, xfs_extlen_t tot);
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extern int xfs_dir_getdents(struct xfs_trans *tp, struct xfs_inode *dp,
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uio_t *uio, int *eofp);
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extern int xfs_dir_replace(struct xfs_trans *tp, struct xfs_inode *dp,
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char *name, int namelen, xfs_ino_t inum,
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xfs_fsblock_t *first,
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struct xfs_bmap_free *flist, xfs_extlen_t tot);
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extern int xfs_dir_canenter(struct xfs_trans *tp, struct xfs_inode *dp,
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char *name, int namelen);
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extern int xfs_dir_ino_validate(struct xfs_mount *mp, xfs_ino_t ino);
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/*
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* Utility routines for v2 directories.
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*/
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extern int xfs_dir2_grow_inode(struct xfs_da_args *args, int space,
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xfs_dir2_db_t *dbp);
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extern int xfs_dir2_isblock(struct xfs_trans *tp, struct xfs_inode *dp,
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int *vp);
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extern int xfs_dir2_isleaf(struct xfs_trans *tp, struct xfs_inode *dp,
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int *vp);
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extern int xfs_dir2_shrink_inode(struct xfs_da_args *args, xfs_dir2_db_t db,
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struct xfs_dabuf *bp);
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#endif /* __XFS_DIR2_H__ */
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