include/linux/xattr.h

   1 /*
   2   File: linux/xattr.h
   3
   4   Extended attributes handling.
   5
   6   Copyright (C) 2001 by Andreas Gruenbacher <a.gruenbacher@computer.org>
   7   Copyright (c) 2001-2002 Silicon Graphics, Inc.  All Rights Reserved.
   8   Copyright (c) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com>
   9 */
  10 #ifndef _LINUX_XATTR_H
  11 #define _LINUX_XATTR_H
  12
  13 #define XATTR_CREATE    0x1     /* set value, fail if attr already exists */
  14 #define XATTR_REPLACE   0x2     /* set value, fail if attr does not exist */
  15
  16 #define XATTR_SECURITY_PREFIX   "security."
  17
  18 struct xattr_handler {
  19         char *prefix;
  20         size_t (*list)(struct inode *inode, char *list, size_t list_size,
  21                        const char *name, size_t name_len);
  22         int (*get)(struct inode *inode, const char *name, void *buffer,
  23                    size_t size);
  24         int (*set)(struct inode *inode, const char *name, const void *buffer,
  25                    size_t size, int flags);
  26 };
  27
  28 ssize_t generic_getxattr(struct dentry *dentry, const char *name, void *buffer, size_t size);
  29 ssize_t generic_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size);
  30 int generic_setxattr(struct dentry *dentry, const char *name, const void *value, size_t size, int flags);
  31 int generic_removexattr(struct dentry *dentry, const char *name);
  32
  33 #endif  /* _LINUX_XATTR_H */