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
  24 enum 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
  33 struct ocfs2_security_xattr_info {
  34         int enable;
  35         char *name;
  36         void *value;
  37         size_t value_len;
  38 };
  39
  40 extern struct xattr_handler ocfs2_xattr_user_handler;
  41 extern struct xattr_handler ocfs2_xattr_trusted_handler;
  42 extern struct xattr_handler ocfs2_xattr_security_handler;
  43 #ifdef CONFIG_OCFS2_FS_POSIX_ACL
  44 extern struct xattr_handler ocfs2_xattr_acl_access_handler;
  45 extern struct xattr_handler ocfs2_xattr_acl_default_handler;
  46 #endif
  47 extern struct xattr_handler *ocfs2_xattr_handlers[];
  48
  49 ssize_t ocfs2_listxattr(struct dentry *, char *, size_t);
  50 int ocfs2_xattr_get_nolock(struct inode *, struct buffer_head *, int,
  51                            const char *, void *, size_t);
  52 int ocfs2_xattr_set(struct inode *, int, const char *, const void *,
  53                     size_t, int);
  54 int ocfs2_xattr_set_handle(handle_t *, struct inode *, struct buffer_head *,
  55                            int, const char *, const void *, size_t, int,
  56                            struct ocfs2_alloc_context *,
  57                            struct ocfs2_alloc_context *);
  58 int ocfs2_xattr_remove(struct inode *, struct buffer_head *);
  59 int ocfs2_init_security_get(struct inode *, struct inode *,
  60                             struct ocfs2_security_xattr_info *);
  61 int 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 *);
  66 int ocfs2_calc_security_init(struct inode *,
  67                              struct ocfs2_security_xattr_info *,
  68                              int *, int *, struct ocfs2_alloc_context **);
  69 int 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  */
  80 struct 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
  86
  87 #endif /* OCFS2_XATTR_H */