127 строки
3.8 KiB
C
127 строки
3.8 KiB
C
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/*
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* Copyright (c) 2000-2001 Silicon Graphics, Inc. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 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, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Further, this software is distributed without any warranty that it is
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* free of the rightful claim of any third person regarding infringement
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* or the like. Any license provided herein, whether implied or
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* otherwise, applies only to this software file. Patent licenses, if
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* any, provided herein do not apply to combinations of this program with
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* other software, or any other product whatsoever.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write the Free Software Foundation, Inc., 59
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* Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*
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* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
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* Mountain View, CA 94043, or:
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*
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* http://www.sgi.com
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*
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* For further information regarding this notice, see:
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*
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* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
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*/
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#ifndef __XFS_DIR2_BLOCK_H__
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#define __XFS_DIR2_BLOCK_H__
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/*
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* xfs_dir2_block.h
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* Directory version 2, single block format structures
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*/
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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_data_hdr;
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struct xfs_dir2_leaf_entry;
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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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* The single block format is as follows:
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* xfs_dir2_data_hdr_t structure
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* xfs_dir2_data_entry_t and xfs_dir2_data_unused_t structures
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* xfs_dir2_leaf_entry_t structures
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* xfs_dir2_block_tail_t structure
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*/
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#define XFS_DIR2_BLOCK_MAGIC 0x58443242 /* XD2B: for one block dirs */
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typedef struct xfs_dir2_block_tail {
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__uint32_t count; /* count of leaf entries */
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__uint32_t stale; /* count of stale lf entries */
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} xfs_dir2_block_tail_t;
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/*
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* Generic single-block structure, for xfs_db.
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*/
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typedef struct xfs_dir2_block {
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xfs_dir2_data_hdr_t hdr; /* magic XFS_DIR2_BLOCK_MAGIC */
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xfs_dir2_data_union_t u[1];
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xfs_dir2_leaf_entry_t leaf[1];
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xfs_dir2_block_tail_t tail;
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} xfs_dir2_block_t;
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/*
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* Pointer to the leaf header embedded in a data block (1-block format)
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*/
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#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_BLOCK_TAIL_P)
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xfs_dir2_block_tail_t *
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xfs_dir2_block_tail_p(struct xfs_mount *mp, xfs_dir2_block_t *block);
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#define XFS_DIR2_BLOCK_TAIL_P(mp,block) xfs_dir2_block_tail_p(mp,block)
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#else
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#define XFS_DIR2_BLOCK_TAIL_P(mp,block) \
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(((xfs_dir2_block_tail_t *)((char *)(block) + (mp)->m_dirblksize)) - 1)
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#endif
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/*
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* Pointer to the leaf entries embedded in a data block (1-block format)
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*/
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#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_BLOCK_LEAF_P)
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struct xfs_dir2_leaf_entry *xfs_dir2_block_leaf_p(xfs_dir2_block_tail_t *btp);
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#define XFS_DIR2_BLOCK_LEAF_P(btp) \
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xfs_dir2_block_leaf_p(btp)
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#else
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#define XFS_DIR2_BLOCK_LEAF_P(btp) \
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(((struct xfs_dir2_leaf_entry *)(btp)) - INT_GET((btp)->count, ARCH_CONVERT))
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#endif
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/*
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* Function declarations.
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*/
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extern int
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xfs_dir2_block_addname(struct xfs_da_args *args);
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extern int
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xfs_dir2_block_getdents(struct xfs_trans *tp, struct xfs_inode *dp,
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struct uio *uio, int *eofp, struct xfs_dirent *dbp,
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xfs_dir2_put_t put);
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extern int
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xfs_dir2_block_lookup(struct xfs_da_args *args);
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extern int
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xfs_dir2_block_removename(struct xfs_da_args *args);
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extern int
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xfs_dir2_block_replace(struct xfs_da_args *args);
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extern int
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xfs_dir2_leaf_to_block(struct xfs_da_args *args, struct xfs_dabuf *lbp,
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struct xfs_dabuf *dbp);
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extern int
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xfs_dir2_sf_to_block(struct xfs_da_args *args);
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#endif /* __XFS_DIR2_BLOCK_H__ */
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