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e922fffa41
SGI-PV: 943272 SGI-Modid: xfs-linux-melb:xfs-kern:25491a Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nathan Scott <nathans@sgi.com>
95 lines
3 KiB
C
95 lines
3 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_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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__be32 count; /* count of leaf entries */
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__be32 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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#define XFS_DIR2_BLOCK_TAIL_P(mp,block) xfs_dir2_block_tail_p(mp,block)
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static inline 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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{
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return (((xfs_dir2_block_tail_t *)
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((char *)(block) + (mp)->m_dirblksize)) - 1);
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}
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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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#define XFS_DIR2_BLOCK_LEAF_P(btp) xfs_dir2_block_leaf_p(btp)
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static inline struct xfs_dir2_leaf_entry *
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xfs_dir2_block_leaf_p(xfs_dir2_block_tail_t *btp)
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{
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return ((struct xfs_dir2_leaf_entry *)btp) - be32_to_cpu(btp->count);
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}
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/*
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* Function declarations.
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*/
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extern int xfs_dir2_block_addname(struct xfs_da_args *args);
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extern int xfs_dir2_block_getdents(struct xfs_trans *tp, struct xfs_inode *dp,
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struct uio *uio, int *eofp,
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struct xfs_dirent *dbp, xfs_dir2_put_t put);
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extern int xfs_dir2_block_lookup(struct xfs_da_args *args);
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extern int xfs_dir2_block_removename(struct xfs_da_args *args);
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extern int xfs_dir2_block_replace(struct xfs_da_args *args);
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extern int xfs_dir2_leaf_to_block(struct xfs_da_args *args,
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struct xfs_dabuf *lbp, struct xfs_dabuf *dbp);
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extern int xfs_dir2_sf_to_block(struct xfs_da_args *args);
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#endif /* __XFS_DIR2_BLOCK_H__ */
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