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  * Function prototypes
   7  *
   8  * Copyright (C) 2008 Oracle.  All rights reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public
  12  * License as published by the Free Software Foundation; either
  13  * version 2 of the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public
  21  * License along with this program; if not, write to the
  22  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  23  * Boston, MA 021110-1307, USA.
  24  */
  25
  26 #ifndef OCFS2_XATTR_H
  27 #define OCFS2_XATTR_H
  28
  29 #include <linux/init.h>
  30 #include <linux/xattr.h>
  31
  32 enum ocfs2_xattr_type {
  33         OCFS2_XATTR_INDEX_USER = 1,
  34         OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS,
  35         OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT,
  36         OCFS2_XATTR_INDEX_TRUSTED,
  37         OCFS2_XATTR_INDEX_SECURITY,
  38         OCFS2_XATTR_MAX
  39 };
  40
  41 extern struct xattr_handler ocfs2_xattr_user_handler;
  42 extern struct xattr_handler ocfs2_xattr_trusted_handler;
  43
  44 extern ssize_t ocfs2_listxattr(struct dentry *, char *, size_t);
  45 extern int ocfs2_xattr_get(struct inode *, int, const char *, void *, size_t);
  46 extern int ocfs2_xattr_set(struct inode *, int, const char *, const void *,
  47                            size_t, int);
  48 extern int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh);
  49 extern struct xattr_handler *ocfs2_xattr_handlers[];
  50
  51 static inline u16 ocfs2_xattr_buckets_per_cluster(struct ocfs2_super *osb)
  52 {
  53         return (1 << osb->s_clustersize_bits) / OCFS2_XATTR_BUCKET_SIZE;
  54 }
  55
  56 static inline u16 ocfs2_blocks_per_xattr_bucket(struct super_block *sb)
  57 {
  58         return OCFS2_XATTR_BUCKET_SIZE / (1 << sb->s_blocksize_bits);
  59 }
  60
  61 static inline u16 ocfs2_xattr_max_xe_in_bucket(struct super_block *sb)
  62 {
  63         u16 len = sb->s_blocksize -
  64                  offsetof(struct ocfs2_xattr_header, xh_entries);
  65
  66         return len / sizeof(struct ocfs2_xattr_entry);
  67 }
  68 #endif /* OCFS2_XATTR_H */