linux/fs/ocfs2/xattr.h
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   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 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_acl_access_handler;
  44extern const struct xattr_handler ocfs2_xattr_acl_default_handler;
  45extern const 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                            const struct qstr *,
  61                            struct ocfs2_security_xattr_info *);
  62int ocfs2_init_security_set(handle_t *, struct inode *,
  63                            struct buffer_head *,
  64                            struct ocfs2_security_xattr_info *,
  65                            struct ocfs2_alloc_context *,
  66                            struct ocfs2_alloc_context *);
  67int ocfs2_calc_security_init(struct inode *,
  68                             struct ocfs2_security_xattr_info *,
  69                             int *, int *, struct ocfs2_alloc_context **);
  70int ocfs2_calc_xattr_init(struct inode *, struct buffer_head *,
  71                          umode_t, struct ocfs2_security_xattr_info *,
  72                          int *, int *, int *);
  73
  74/*
  75 * xattrs can live inside an inode, as part of an external xattr block,
  76 * or inside an xattr bucket, which is the leaf of a tree rooted in an
  77 * xattr block.  Some of the xattr calls, especially the value setting
  78 * functions, want to treat each of these locations as equal.  Let's wrap
  79 * them in a structure that we can pass around instead of raw buffer_heads.
  80 */
  81struct ocfs2_xattr_value_buf {
  82        struct buffer_head              *vb_bh;
  83        ocfs2_journal_access_func       vb_access;
  84        struct ocfs2_xattr_value_root   *vb_xv;
  85};
  86
  87int ocfs2_xattr_attach_refcount_tree(struct inode *inode,
  88                                     struct buffer_head *fe_bh,
  89                                     struct ocfs2_caching_info *ref_ci,
  90                                     struct buffer_head *ref_root_bh,
  91                                     struct ocfs2_cached_dealloc_ctxt *dealloc);
  92int ocfs2_reflink_xattrs(struct inode *old_inode,
  93                         struct buffer_head *old_bh,
  94                         struct inode *new_inode,
  95                         struct buffer_head *new_bh,
  96                         bool preserve_security);
  97int ocfs2_init_security_and_acl(struct inode *dir,
  98                                struct inode *inode,
  99                                const struct qstr *qstr);
 100#endif /* OCFS2_XATTR_H */
 101
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