9b7895efac
This patch makes use of Ocfs2's flexible btree code to add an additional tree to directory inodes. The new tree stores an array of small, fixed-length records in each leaf block. Each record stores a hash value, and pointer to a block in the traditional (unindexed) directory tree where a dirent with the given name hash resides. Lookup exclusively uses this tree to find dirents, thus providing us with constant time name lookups. Some of the hashing code was copied from ext3. Unfortunately, it has lots of unfixed checkpatch errors. I left that as-is so that tracking changes would be easier. Signed-off-by: Mark Fasheh <mfasheh@suse.com> Acked-by: Joel Becker <joel.becker@oracle.com>
88 lines
3 KiB
C
88 lines
3 KiB
C
/* -*- mode: c; c-basic-offset: 8; -*-
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* vim: noexpandtab sw=8 ts=8 sts=0:
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*
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* xattr.h
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*
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* Copyright (C) 2004, 2008 Oracle. 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
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* License version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will 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 GNU
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* General Public License for more details.
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*/
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#ifndef OCFS2_XATTR_H
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#define OCFS2_XATTR_H
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#include <linux/init.h>
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#include <linux/xattr.h>
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enum ocfs2_xattr_type {
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OCFS2_XATTR_INDEX_USER = 1,
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OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS,
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OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT,
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OCFS2_XATTR_INDEX_TRUSTED,
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OCFS2_XATTR_INDEX_SECURITY,
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OCFS2_XATTR_MAX
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};
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struct ocfs2_security_xattr_info {
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int enable;
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char *name;
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void *value;
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size_t value_len;
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};
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extern struct xattr_handler ocfs2_xattr_user_handler;
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extern struct xattr_handler ocfs2_xattr_trusted_handler;
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extern struct xattr_handler ocfs2_xattr_security_handler;
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#ifdef CONFIG_OCFS2_FS_POSIX_ACL
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extern struct xattr_handler ocfs2_xattr_acl_access_handler;
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extern struct xattr_handler ocfs2_xattr_acl_default_handler;
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#endif
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extern struct xattr_handler *ocfs2_xattr_handlers[];
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ssize_t ocfs2_listxattr(struct dentry *, char *, size_t);
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int ocfs2_xattr_get_nolock(struct inode *, struct buffer_head *, int,
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const char *, void *, size_t);
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int ocfs2_xattr_set(struct inode *, int, const char *, const void *,
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size_t, int);
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int ocfs2_xattr_set_handle(handle_t *, struct inode *, struct buffer_head *,
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int, const char *, const void *, size_t, int,
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struct ocfs2_alloc_context *,
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struct ocfs2_alloc_context *);
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int ocfs2_xattr_remove(struct inode *, struct buffer_head *);
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int ocfs2_init_security_get(struct inode *, struct inode *,
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struct ocfs2_security_xattr_info *);
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int ocfs2_init_security_set(handle_t *, struct inode *,
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struct buffer_head *,
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struct ocfs2_security_xattr_info *,
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struct ocfs2_alloc_context *,
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struct ocfs2_alloc_context *);
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int ocfs2_calc_security_init(struct inode *,
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struct ocfs2_security_xattr_info *,
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int *, int *, struct ocfs2_alloc_context **);
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int ocfs2_calc_xattr_init(struct inode *, struct buffer_head *,
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int, struct ocfs2_security_xattr_info *,
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int *, int *, int *);
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/*
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* xattrs can live inside an inode, as part of an external xattr block,
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* or inside an xattr bucket, which is the leaf of a tree rooted in an
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* xattr block. Some of the xattr calls, especially the value setting
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* functions, want to treat each of these locations as equal. Let's wrap
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* them in a structure that we can pass around instead of raw buffer_heads.
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*/
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struct ocfs2_xattr_value_buf {
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struct buffer_head *vb_bh;
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ocfs2_journal_access_func vb_access;
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struct ocfs2_xattr_value_root *vb_xv;
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};
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#endif /* OCFS2_XATTR_H */
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