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 /* 23 * jfs_ea_list describe the on-disk format of the extended attributes. 24 * I know the null-terminator is redundant since namelen is stored, but 25 * I am maintaining compatibility with OS/2 where possible. 26 */ 27 struct jfs_ea { 28 u8 flag; /* Unused? */ 29 u8 namelen; /* Length of name */ 30 __le16 valuelen; /* Length of value */ 31 char name[0]; /* Attribute name (includes null-terminator) */ 32 }; /* Value immediately follows name */ 33 34 struct jfs_ea_list { 35 __le32 size; /* overall size */ 36 struct jfs_ea ea[0]; /* Variable length list */ 37 }; 38 39 /* Macros for defining maxiumum number of bytes supported for EAs */ 40 #define MAXEASIZE 65535 41 #define MAXEALISTSIZE MAXEASIZE 42 43 /* 44 * some macros for dealing with variable length EA lists. 45 */ 46 #define EA_SIZE(ea) \ 47 (sizeof (struct jfs_ea) + (ea)->namelen + 1 + \ 48 le16_to_cpu((ea)->valuelen)) 49 #define NEXT_EA(ea) ((struct jfs_ea *) (((char *) (ea)) + (EA_SIZE (ea)))) 50 #define FIRST_EA(ealist) ((ealist)->ea) 51 #define EALIST_SIZE(ealist) le32_to_cpu((ealist)->size) 52 #define END_EALIST(ealist) \ 53 ((struct jfs_ea *) (((char *) (ealist)) + EALIST_SIZE(ealist))) 54 55 extern int __jfs_setxattr(tid_t, struct inode *, const char *, const void *, 56 size_t, int); 57 extern int jfs_setxattr(struct dentry *, const char *, const void *, size_t, 58 int); 59 extern ssize_t __jfs_getxattr(struct inode *, const char *, void *, size_t); 60 extern ssize_t jfs_getxattr(struct dentry *, const char *, void *, size_t); 61 extern ssize_t jfs_listxattr(struct dentry *, char *, size_t); 62 extern int jfs_removexattr(struct dentry *, const char *); 63 64 extern const struct xattr_handler *jfs_xattr_handlers[]; 65 66 #ifdef CONFIG_JFS_SECURITY 67 extern int jfs_init_security(tid_t, struct inode *, struct inode *, 68 const struct qstr *); 69 #else 70 static inline int jfs_init_security(tid_t tid, struct inode *inode, 71 struct inode *dir, const struct qstr *qstr) 72 { 73 return 0; 74 } 75 #endif 76 77 #endif /* H_JFS_XATTR */ 78