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         const char *name;
  36         void *value;
  37         size_t value_len;
  38 };
  39
  40 extern const struct xattr_handler ocfs2_xattr_user_handler;
  41 extern const struct xattr_handler ocfs2_xattr_trusted_handler;
  42 extern const struct xattr_handler ocfs2_xattr_security_handler;
  43 extern const struct xattr_handler *ocfs2_xattr_handlers[];
  44
  45 ssize_t ocfs2_listxattr(struct dentry *, char *, size_t);
  46 int ocfs2_xattr_get_nolock(struct inode *, struct buffer_head *, int,
  47                            const char *, void *, size_t);
  48 int ocfs2_xattr_set(struct inode *, int, const char *, const void *,
  49                     size_t, int);
  50 int 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 *);
  54 int ocfs2_has_inline_xattr_value_outside(struct inode *inode,
  55                                          struct ocfs2_dinode *di);
  56 int ocfs2_xattr_remove(struct inode *, struct buffer_head *);
  57 int ocfs2_init_security_get(struct inode *, struct inode *,
  58                             const struct qstr *,
  59                             struct ocfs2_security_xattr_info *);
  60 int 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 *);
  65 int ocfs2_calc_security_init(struct inode *,
  66                              struct ocfs2_security_xattr_info *,
  67                              int *, int *, struct ocfs2_alloc_context **);
  68 int 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  */
  79 struct 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
  85 int 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);
  90 int 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);
  95 int ocfs2_init_security_and_acl(struct inode *dir,
  96                                 struct inode *inode,
  97                                 const struct qstr *qstr);
  98 #endif /* OCFS2_XATTR_H */