1494N/A * Copyright (c) 2006, 2012, Oracle and/or its affiliates. All rights reserved. 1494N/A * Copyright (c) 2012 Intel Corporation. All rights reserved. 1494N/A * IOCTLs for authentication 1494N/A * \author Rickard E. (Rik) Faith <faith@valinux.com> 1494N/A * \author Gareth Hughes <gareth@valinux.com> 1494N/A * Created: Tue Feb 2 08:37:54 1999 by faith@valinux.com 1494N/A * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. 1494N/A * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. 1494N/A * Permission is hereby granted, free of charge, to any person obtaining a 1494N/A * copy of this software and associated documentation files (the "Software"), 1494N/A * to deal in the Software without restriction, including without limitation 1494N/A * the rights to use, copy, modify, merge, publish, distribute, sublicense, 1494N/A * and/or sell copies of the Software, and to permit persons to whom the 1494N/A * Software is furnished to do so, subject to the following conditions: 1494N/A * The above copyright notice and this permission notice (including the next 1494N/A * paragraph) shall be included in all copies or substantial portions of the 1494N/A * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 1494N/A * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 1494N/A * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 1494N/A * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 1494N/A * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 1494N/A * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 1494N/A * OTHER DEALINGS IN THE SOFTWARE. 1494N/A * Generate a hash key from a magic. 1494N/A * The key is the modulus of the hash table size, #DRM_HASH_SIZE, which must be 1494N/A * Find the file with the given magic number. 1494N/A * \param magic magic number. 1494N/A * Searches in drm_device::magiclist within all files with the same hash key 1494N/A * the one with matching magic number, while holding the drm_device::struct_mutex 1494N/A * \param priv file private data. 1494N/A * \param magic magic number. 1494N/A * Creates a drm_magic_entry structure and appends to the linked list 1494N/A * associated the magic number hash key in drm_device::magiclist, while holding 1494N/A * the drm_device::struct_mutex lock. 1494N/A * \param magic magic number. 1494N/A * Searches and unlinks the entry in drm_device::magiclist with the magic 1494N/A * number hash key, while holding the drm_device::struct_mutex lock. 1494N/A * Get a unique magic number (ioctl). 1494N/A * \param inode device inode. 1494N/A * \param file_priv DRM file private. 1494N/A * \param arg pointer to a resulting drm_auth structure. 1494N/A * \return zero on success, or a negative number on failure. 1494N/A * If there is a magic number in drm_file::magic then use it, otherwise 1494N/A * searches an unique non-zero magic number and add it associating it with \p 1494N/A * This ioctl needs protection by the drm_global_mutex, which protects 1494N/A * struct drm_file::magic and struct drm_magic_entry::priv. 1494N/A * Authenticate with a magic. 1494N/A * \param inode device inode. 1494N/A * \param file_priv DRM file private. 1494N/A * \param arg pointer to a drm_auth structure. 1494N/A * \return zero if authentication successed, or a negative number otherwise. 1494N/A * Checks if \p file_priv is associated with the magic number passed in \arg. 1494N/A * This ioctl needs protection by the drm_global_mutex, which protects 1494N/A * struct drm_file::magic and struct drm_magic_entry::priv.