fs/devpts/xattr_security.c

   1 /*
   2  * Security xattr support for devpts.
   3  *
   4  * Author: Stephen Smalley <sds@epoch.ncsc.mil>
   5  * Copyright (c) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the Free
   9  * Software Foundation; either version 2 of the License, or (at your option)
  10  * any later version.
  11  */
  12 #include <linux/string.h>
  13 #include <linux/fs.h>
  14 #include <linux/security.h>
  15 #include <linux/xattr.h>
  16
  17 static size_t
  18 devpts_xattr_security_list(struct inode *inode, char *list, size_t list_len,
  19                            const char *name, size_t name_len)
  20 {
  21         return security_inode_listsecurity(inode, list, list_len);
  22 }
  23
  24 static int
  25 devpts_xattr_security_get(struct inode *inode, const char *name,
  26                           void *buffer, size_t size)
  27 {
  28         if (strcmp(name, "") == 0)
  29                 return -EINVAL;
  30         return security_inode_getsecurity(inode, name, buffer, size);
  31 }
  32
  33 static int
  34 devpts_xattr_security_set(struct inode *inode, const char *name,
  35                           const void *value, size_t size, int flags)
  36 {
  37         if (strcmp(name, "") == 0)
  38                 return -EINVAL;
  39         return security_inode_setsecurity(inode, name, value, size, flags);
  40 }
  41
  42 struct xattr_handler devpts_xattr_security_handler = {
  43         .prefix = XATTR_SECURITY_PREFIX,
  44         .list   = devpts_xattr_security_list,
  45         .get    = devpts_xattr_security_get,
  46         .set    = devpts_xattr_security_set,
  47 };