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/*

  File: linux/xattr.h

  Extended attributes handling.

  Copyright (C) 2001 by Andreas Gruenbacher <a.gruenbacher@computer.org>

  Copyright (c) 2001-2002 Silicon Graphics, Inc.  All Rights Reserved.

  Copyright (c) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com>

*/

#ifndef _LINUX_XATTR_H

#define _LINUX_XATTR_H

#define XATTR_CREATE    0x1     /* set value, fail if attr already exists */

#define XATTR_REPLACE   0x2     /* set value, fail if attr does not exist */

#ifdef  __KERNEL__

#include <linux/types.h>

/* Namespaces */

#define XATTR_OS2_PREFIX "os2."

#define XATTR_OS2_PREFIX_LEN (sizeof (XATTR_OS2_PREFIX) - 1)

#define XATTR_SECURITY_PREFIX   "security."

#define XATTR_SECURITY_PREFIX_LEN (sizeof (XATTR_SECURITY_PREFIX) - 1)

#define XATTR_SYSTEM_PREFIX "system."

#define XATTR_SYSTEM_PREFIX_LEN (sizeof (XATTR_SYSTEM_PREFIX) - 1)

#define XATTR_TRUSTED_PREFIX "trusted."

#define XATTR_TRUSTED_PREFIX_LEN (sizeof (XATTR_TRUSTED_PREFIX) - 1)

#define XATTR_USER_PREFIX "user."

#define XATTR_USER_PREFIX_LEN (sizeof (XATTR_USER_PREFIX) - 1)

struct inode;

struct dentry;

struct xattr_handler {

        char *prefix;

        size_t (*list)(struct inode *inode, char *list, size_t list_size,

                       const char *name, size_t name_len);

        int (*get)(struct inode *inode, const char *name, void *buffer,

                   size_t size);

        int (*set)(struct inode *inode, const char *name, const void *buffer,

                   size_t size, int flags);

};

ssize_t vfs_getxattr(struct dentry *, char *, void *, size_t);

ssize_t vfs_listxattr(struct dentry *d, char *list, size_t size);

int vfs_setxattr(struct dentry *, char *, void *, size_t, int);

int vfs_removexattr(struct dentry *, char *);

ssize_t generic_getxattr(struct dentry *dentry, const char *name, void *buffer, size_t size);

ssize_t generic_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size);

int generic_setxattr(struct dentry *dentry, const char *name, const void *value, size_t size, int flags);

int generic_removexattr(struct dentry *dentry, const char *name);

#endif  /*  __KERNEL__  */

#endif  /* _LINUX_XATTR_H */