Root/fs/ocfs2/xattr.h

1/* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * xattr.h
5 *
6 * Copyright (C) 2004, 2008 Oracle. All rights reserved.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public
10 * License version 2 as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 */
17
18#ifndef OCFS2_XATTR_H
19#define OCFS2_XATTR_H
20
21#include <linux/init.h>
22#include <linux/xattr.h>
23
24enum ocfs2_xattr_type {
25    OCFS2_XATTR_INDEX_USER = 1,
26    OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS,
27    OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT,
28    OCFS2_XATTR_INDEX_TRUSTED,
29    OCFS2_XATTR_INDEX_SECURITY,
30    OCFS2_XATTR_MAX
31};
32
33struct ocfs2_security_xattr_info {
34    int enable;
35    char *name;
36    void *value;
37    size_t value_len;
38};
39
40extern struct xattr_handler ocfs2_xattr_user_handler;
41extern struct xattr_handler ocfs2_xattr_trusted_handler;
42extern struct xattr_handler ocfs2_xattr_security_handler;
43extern struct xattr_handler ocfs2_xattr_acl_access_handler;
44extern struct xattr_handler ocfs2_xattr_acl_default_handler;
45extern struct xattr_handler *ocfs2_xattr_handlers[];
46
47ssize_t ocfs2_listxattr(struct dentry *, char *, size_t);
48int ocfs2_xattr_get_nolock(struct inode *, struct buffer_head *, int,
49               const char *, void *, size_t);
50int ocfs2_xattr_set(struct inode *, int, const char *, const void *,
51            size_t, int);
52int ocfs2_xattr_set_handle(handle_t *, struct inode *, struct buffer_head *,
53               int, const char *, const void *, size_t, int,
54               struct ocfs2_alloc_context *,
55               struct ocfs2_alloc_context *);
56int ocfs2_has_inline_xattr_value_outside(struct inode *inode,
57                     struct ocfs2_dinode *di);
58int ocfs2_xattr_remove(struct inode *, struct buffer_head *);
59int ocfs2_init_security_get(struct inode *, struct inode *,
60                struct ocfs2_security_xattr_info *);
61int ocfs2_init_security_set(handle_t *, struct inode *,
62                struct buffer_head *,
63                struct ocfs2_security_xattr_info *,
64                struct ocfs2_alloc_context *,
65                struct ocfs2_alloc_context *);
66int ocfs2_calc_security_init(struct inode *,
67                 struct ocfs2_security_xattr_info *,
68                 int *, int *, struct ocfs2_alloc_context **);
69int ocfs2_calc_xattr_init(struct inode *, struct buffer_head *,
70              int, struct ocfs2_security_xattr_info *,
71              int *, int *, int *);
72
73/*
74 * xattrs can live inside an inode, as part of an external xattr block,
75 * or inside an xattr bucket, which is the leaf of a tree rooted in an
76 * xattr block. Some of the xattr calls, especially the value setting
77 * functions, want to treat each of these locations as equal. Let's wrap
78 * them in a structure that we can pass around instead of raw buffer_heads.
79 */
80struct ocfs2_xattr_value_buf {
81    struct buffer_head *vb_bh;
82    ocfs2_journal_access_func vb_access;
83    struct ocfs2_xattr_value_root *vb_xv;
84};
85
86int ocfs2_xattr_attach_refcount_tree(struct inode *inode,
87                     struct buffer_head *fe_bh,
88                     struct ocfs2_caching_info *ref_ci,
89                     struct buffer_head *ref_root_bh,
90                     struct ocfs2_cached_dealloc_ctxt *dealloc);
91int ocfs2_reflink_xattrs(struct inode *old_inode,
92             struct buffer_head *old_bh,
93             struct inode *new_inode,
94             struct buffer_head *new_bh,
95             bool preserve_security);
96int ocfs2_init_security_and_acl(struct inode *dir,
97                struct inode *inode);
98#endif /* OCFS2_XATTR_H */
99

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