LXR linux/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#ifdef  __KERNEL__
  17
  18#include <linux/types.h>
  19
  20/* Namespaces */
  21#define XATTR_OS2_PREFIX "os2."
  22#define XATTR_OS2_PREFIX_LEN (sizeof (XATTR_OS2_PREFIX) - 1)
  23
  24#define XATTR_SECURITY_PREFIX   "security."
  25#define XATTR_SECURITY_PREFIX_LEN (sizeof (XATTR_SECURITY_PREFIX) - 1)
  26
  27#define XATTR_SYSTEM_PREFIX "system."
  28#define XATTR_SYSTEM_PREFIX_LEN (sizeof (XATTR_SYSTEM_PREFIX) - 1)
  29
  30#define XATTR_TRUSTED_PREFIX "trusted."
  31#define XATTR_TRUSTED_PREFIX_LEN (sizeof (XATTR_TRUSTED_PREFIX) - 1)
  32
  33#define XATTR_USER_PREFIX "user."
  34#define XATTR_USER_PREFIX_LEN (sizeof (XATTR_USER_PREFIX) - 1)
  35
  36struct inode;
  37struct dentry;
  38
  39struct xattr_handler {
  40        char *prefix;
  41        size_t (*list)(struct inode *inode, char *list, size_t list_size,
  42                       const char *name, size_t name_len);
  43        int (*get)(struct inode *inode, const char *name, void *buffer,
  44                   size_t size);
  45        int (*set)(struct inode *inode, const char *name, const void *buffer,
  46                   size_t size, int flags);
  47};
  48
  49ssize_t xattr_getsecurity(struct inode *, const char *, void *, size_t);
  50ssize_t vfs_getxattr(struct dentry *, const char *, void *, size_t);
  51ssize_t vfs_listxattr(struct dentry *d, char *list, size_t size);
  52int __vfs_setxattr_noperm(struct dentry *, const char *, const void *, size_t, int);
  53int vfs_setxattr(struct dentry *, const char *, const void *, size_t, int);
  54int vfs_removexattr(struct dentry *, const char *);
  55
  56ssize_t generic_getxattr(struct dentry *dentry, const char *name, void *buffer, size_t size);
  57ssize_t generic_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size);
  58int generic_setxattr(struct dentry *dentry, const char *name, const void *value, size_t size, int flags);
  59int generic_removexattr(struct dentry *dentry, const char *name);
  60
  61#endif  /*  __KERNEL__  */
  62
  63#endif  /* _LINUX_XATTR_H */
  64