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 */ 69