diff options
Diffstat (limited to 'kernel/fs/jfs/jfs_xattr.h')
| -rw-r--r-- | kernel/fs/jfs/jfs_xattr.h | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/kernel/fs/jfs/jfs_xattr.h b/kernel/fs/jfs/jfs_xattr.h new file mode 100644 index 000000000..e8d717dab --- /dev/null +++ b/kernel/fs/jfs/jfs_xattr.h @@ -0,0 +1,77 @@ +/* + * Copyright (C) International Business Machines Corp., 2000-2002 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See + * the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#ifndef H_JFS_XATTR +#define H_JFS_XATTR + +/* + * jfs_ea_list describe the on-disk format of the extended attributes. + * I know the null-terminator is redundant since namelen is stored, but + * I am maintaining compatibility with OS/2 where possible. + */ +struct jfs_ea { + u8 flag; /* Unused? */ + u8 namelen; /* Length of name */ + __le16 valuelen; /* Length of value */ + char name[0]; /* Attribute name (includes null-terminator) */ +}; /* Value immediately follows name */ + +struct jfs_ea_list { + __le32 size; /* overall size */ + struct jfs_ea ea[0]; /* Variable length list */ +}; + +/* Macros for defining maxiumum number of bytes supported for EAs */ +#define MAXEASIZE 65535 +#define MAXEALISTSIZE MAXEASIZE + +/* + * some macros for dealing with variable length EA lists. + */ +#define EA_SIZE(ea) \ + (sizeof (struct jfs_ea) + (ea)->namelen + 1 + \ + le16_to_cpu((ea)->valuelen)) +#define NEXT_EA(ea) ((struct jfs_ea *) (((char *) (ea)) + (EA_SIZE (ea)))) +#define FIRST_EA(ealist) ((ealist)->ea) +#define EALIST_SIZE(ealist) le32_to_cpu((ealist)->size) +#define END_EALIST(ealist) \ + ((struct jfs_ea *) (((char *) (ealist)) + EALIST_SIZE(ealist))) + +extern int __jfs_setxattr(tid_t, struct inode *, const char *, const void *, + size_t, int); +extern int jfs_setxattr(struct dentry *, const char *, const void *, size_t, + int); +extern ssize_t __jfs_getxattr(struct inode *, const char *, void *, size_t); +extern ssize_t jfs_getxattr(struct dentry *, const char *, void *, size_t); +extern ssize_t jfs_listxattr(struct dentry *, char *, size_t); +extern int jfs_removexattr(struct dentry *, const char *); + +extern const struct xattr_handler *jfs_xattr_handlers[]; + +#ifdef CONFIG_JFS_SECURITY +extern int jfs_init_security(tid_t, struct inode *, struct inode *, + const struct qstr *); +#else +static inline int jfs_init_security(tid_t tid, struct inode *inode, + struct inode *dir, const struct qstr *qstr) +{ + return 0; +} +#endif + +#endif /* H_JFS_XATTR */ |