051e7cd44a
Currently xfs has a rather complicated internal scheme to allow for different directory formats in IRIX. This patch rips all code related to this out and pushes useage of the Linux filldir callback into the lowlevel directory code. This does not make the code any less portable because filldir can be used to create dirents of all possible variations (including the IRIX ones as proved by the IRIX binary emulation code under arch/mips/). This patch get rid of an unessecary copy in the readdir path, about 400 lines of code and one of the last two users of the uio structure. This version is updated to deal with dmapi aswell which greatly simplifies the get_dirattrs code. The dmapi part has been tested using the get_dirattrs tools from the xfstest dmapi suite1 with various small and large directories. SGI-PV: 968563 SGI-Modid: xfs-linux-melb:xfs-kern:29478a Signed-off-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: David Chinner <dgc@sgi.com> Signed-off-by: Tim Shimmin <tes@sgi.com>
92 lines
2.8 KiB
C
92 lines
2.8 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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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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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_inode *dp, void *dirent,
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xfs_off_t *offset, filldir_t filldir);
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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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