1 /* 2 * Copyright (C) International Business Machines Corp., 2000-2002 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 12 * the GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 17 */ 18 19 #ifndef H_JFS_XATTR 20 #define H_JFS_XATTR 21 22 #include <linux/xattr.h> 23 24 /* 25 * jfs_ea_list describe the on-disk format of the extended attributes. 26 * I know the null-terminator is redundant since namelen is stored, but 27 * I am maintaining compatibility with OS/2 where possible. 28 */ 29 struct jfs_ea { 30 u8 flag; /* Unused? */ 31 u8 namelen; /* Length of name */ 32 __le16 valuelen; /* Length of value */ 33 char name[0]; /* Attribute name (includes null-terminator) */ 34 }; /* Value immediately follows name */ 35 36 struct jfs_ea_list { 37 __le32 size; /* overall size */ 38 struct jfs_ea ea[0]; /* Variable length list */ 39 }; 40 41 /* Macros for defining maxiumum number of bytes supported for EAs */ 42 #define MAXEASIZE 65535 43 #define MAXEALISTSIZE MAXEASIZE 44 45 /* 46 * some macros for dealing with variable length EA lists. 47 */ 48 #define EA_SIZE(ea) \ 49 (sizeof (struct jfs_ea) + (ea)->namelen + 1 + \ 50 le16_to_cpu((ea)->valuelen)) 51 #define NEXT_EA(ea) ((struct jfs_ea *) (((char *) (ea)) + (EA_SIZE (ea)))) 52 #define FIRST_EA(ealist) ((ealist)->ea) 53 #define EALIST_SIZE(ealist) le32_to_cpu((ealist)->size) 54 #define END_EALIST(ealist) \ 55 ((struct jfs_ea *) (((char *) (ealist)) + EALIST_SIZE(ealist))) 56 57 extern int __jfs_setxattr(tid_t, struct inode *, const char *, const void *, 58 size_t, int); 59 extern ssize_t __jfs_getxattr(struct inode *, const char *, void *, size_t); 60 extern ssize_t jfs_listxattr(struct dentry *, char *, size_t); 61 62 extern const struct xattr_handler *jfs_xattr_handlers[]; 63 64 #ifdef CONFIG_JFS_SECURITY 65 extern int jfs_init_security(tid_t, struct inode *, struct inode *, 66 const struct qstr *); 67 #else 68 static inline int jfs_init_security(tid_t tid, struct inode *inode, 69 struct inode *dir, const struct qstr *qstr) 70 { 71 return 0; 72 } 73 #endif 74 75 #endif /* H_JFS_XATTR */ 76