LXR linux/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        const char *name;
  36        void *value;
  37        size_t value_len;
  38};
  39
  40extern const struct xattr_handler ocfs2_xattr_user_handler;
  41extern const struct xattr_handler ocfs2_xattr_trusted_handler;
  42extern const struct xattr_handler ocfs2_xattr_security_handler;
  43extern const struct xattr_handler *ocfs2_xattr_handlers[];
  44
  45ssize_t ocfs2_listxattr(struct dentry *, char *, size_t);
  46int ocfs2_xattr_get_nolock(struct inode *, struct buffer_head *, int,
  47                           const char *, void *, size_t);
  48int ocfs2_xattr_set(struct inode *, int, const char *, const void *,
  49                    size_t, int);
  50int ocfs2_xattr_set_handle(handle_t *, struct inode *, struct buffer_head *,
  51                           int, const char *, const void *, size_t, int,
  52                           struct ocfs2_alloc_context *,
  53                           struct ocfs2_alloc_context *);
  54int ocfs2_has_inline_xattr_value_outside(struct inode *inode,
  55                                         struct ocfs2_dinode *di);
  56int ocfs2_xattr_remove(struct inode *, struct buffer_head *);
  57int ocfs2_init_security_get(struct inode *, struct inode *,
  58                            const struct qstr *,
  59                            struct ocfs2_security_xattr_info *);
  60int ocfs2_init_security_set(handle_t *, struct inode *,
  61                            struct buffer_head *,
  62                            struct ocfs2_security_xattr_info *,
  63                            struct ocfs2_alloc_context *,
  64                            struct ocfs2_alloc_context *);
  65int ocfs2_calc_security_init(struct inode *,
  66                             struct ocfs2_security_xattr_info *,
  67                             int *, int *, struct ocfs2_alloc_context **);
  68int ocfs2_calc_xattr_init(struct inode *, struct buffer_head *,
  69                          umode_t, struct ocfs2_security_xattr_info *,
  70                          int *, int *, int *);
  71
  72/*
  73 * xattrs can live inside an inode, as part of an external xattr block,
  74 * or inside an xattr bucket, which is the leaf of a tree rooted in an
  75 * xattr block.  Some of the xattr calls, especially the value setting
  76 * functions, want to treat each of these locations as equal.  Let's wrap
  77 * them in a structure that we can pass around instead of raw buffer_heads.
  78 */
  79struct ocfs2_xattr_value_buf {
  80        struct buffer_head              *vb_bh;
  81        ocfs2_journal_access_func       vb_access;
  82        struct ocfs2_xattr_value_root   *vb_xv;
  83};
  84
  85int ocfs2_xattr_attach_refcount_tree(struct inode *inode,
  86                                     struct buffer_head *fe_bh,
  87                                     struct ocfs2_caching_info *ref_ci,
  88                                     struct buffer_head *ref_root_bh,
  89                                     struct ocfs2_cached_dealloc_ctxt *dealloc);
  90int ocfs2_reflink_xattrs(struct inode *old_inode,
  91                         struct buffer_head *old_bh,
  92                         struct inode *new_inode,
  93                         struct buffer_head *new_bh,
  94                         bool preserve_security);
  95int ocfs2_init_security_and_acl(struct inode *dir,
  96                                struct inode *inode,
  97                                const struct qstr *qstr);
  98#endif /* OCFS2_XATTR_H */
  99