/*
    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)

  /* Security namespace */
  #define XATTR_SELINUX_SUFFIX "selinux"
  #define XATTR_NAME_SELINUX XATTR_SECURITY_PREFIX XATTR_SELINUX_SUFFIX
  
  #define XATTR_SMACK_SUFFIX "SMACK64"
  #define XATTR_SMACK_IPIN "SMACK64IPIN"
  #define XATTR_SMACK_IPOUT "SMACK64IPOUT"
  #define XATTR_NAME_SMACK XATTR_SECURITY_PREFIX XATTR_SMACK_SUFFIX
  #define XATTR_NAME_SMACKIPIN	XATTR_SECURITY_PREFIX XATTR_SMACK_IPIN
  #define XATTR_NAME_SMACKIPOUT	XATTR_SECURITY_PREFIX XATTR_SMACK_IPOUT
  
  #define XATTR_CAPS_SUFFIX "capability"
  #define XATTR_NAME_CAPS XATTR_SECURITY_PREFIX XATTR_CAPS_SUFFIX

  struct inode;
  struct dentry;

  
  struct xattr_handler {

  	const char *prefix;

  	int flags;	/* fs private flags passed back to the handlers */
  	size_t (*list)(struct dentry *dentry, char *list, size_t list_size,
  		       const char *name, size_t name_len, int handler_flags);
  	int (*get)(struct dentry *dentry, const char *name, void *buffer,
  		   size_t size, int handler_flags);
  	int (*set)(struct dentry *dentry, const char *name, const void *buffer,
  		   size_t size, int flags, int handler_flags);

  };

  ssize_t xattr_getsecurity(struct inode *, const char *, void *, size_t);

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

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

  int __vfs_setxattr_noperm(struct dentry *, const char *, const void *, size_t, int);

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