diff options
Diffstat (limited to 'bsd-core/drm_auth.c')
| -rw-r--r-- | bsd-core/drm_auth.c | 187 |
1 files changed, 0 insertions, 187 deletions
diff --git a/bsd-core/drm_auth.c b/bsd-core/drm_auth.c deleted file mode 100644 index 6a76ed59..00000000 --- a/bsd-core/drm_auth.c +++ /dev/null @@ -1,187 +0,0 @@ -/*- - * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. - * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. - * All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice (including the next - * paragraph) shall be included in all copies or substantial portions of the - * Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR - * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, - * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR - * OTHER DEALINGS IN THE SOFTWARE. - * - * Authors: - * Rickard E. (Rik) Faith <faith@valinux.com> - * Gareth Hughes <gareth@valinux.com> - * - */ - -/** @file drm_auth.c - * Implementation of the get/authmagic ioctls implementing the authentication - * scheme between the master and clients. - */ - -#include "drmP.h" - -static int drm_hash_magic(drm_magic_t magic) -{ - return magic & (DRM_HASH_SIZE-1); -} - -/** - * Returns the file private associated with the given magic number. - */ -static struct drm_file *drm_find_file(struct drm_device *dev, drm_magic_t magic) -{ - drm_magic_entry_t *pt; - int hash = drm_hash_magic(magic); - - DRM_SPINLOCK_ASSERT(&dev->dev_lock); - - for (pt = dev->magiclist[hash].head; pt; pt = pt->next) { - if (pt->magic == magic) { - return pt->priv; - } - } - - return NULL; -} - -/** - * Inserts the given magic number into the hash table of used magic number - * lists. - */ -static int drm_add_magic(struct drm_device *dev, struct drm_file *priv, - drm_magic_t magic) -{ - int hash; - drm_magic_entry_t *entry; - - DRM_DEBUG("%d\n", magic); - - DRM_SPINLOCK_ASSERT(&dev->dev_lock); - - hash = drm_hash_magic(magic); - entry = malloc(sizeof(*entry), DRM_MEM_MAGIC, M_ZERO | M_NOWAIT); - if (!entry) - return ENOMEM; - entry->magic = magic; - entry->priv = priv; - entry->next = NULL; - - if (dev->magiclist[hash].tail) { - dev->magiclist[hash].tail->next = entry; - dev->magiclist[hash].tail = entry; - } else { - dev->magiclist[hash].head = entry; - dev->magiclist[hash].tail = entry; - } - - return 0; -} - -/** - * Removes the given magic number from the hash table of used magic number - * lists. - */ -static int drm_remove_magic(struct drm_device *dev, drm_magic_t magic) -{ - drm_magic_entry_t *prev = NULL; - drm_magic_entry_t *pt; - int hash; - - DRM_SPINLOCK_ASSERT(&dev->dev_lock); - - DRM_DEBUG("%d\n", magic); - hash = drm_hash_magic(magic); - - for (pt = dev->magiclist[hash].head; pt; prev = pt, pt = pt->next) { - if (pt->magic == magic) { - if (dev->magiclist[hash].head == pt) { - dev->magiclist[hash].head = pt->next; - } - if (dev->magiclist[hash].tail == pt) { - dev->magiclist[hash].tail = prev; - } - if (prev) { - prev->next = pt->next; - } - free(pt, DRM_MEM_MAGIC); - return 0; - } - } - - return EINVAL; -} - -/** - * Called by the client, this returns a unique magic number to be authorized - * by the master. - * - * The master may use its own knowledge of the client (such as the X - * connection that the magic is passed over) to determine if the magic number - * should be authenticated. - */ -int drm_getmagic(struct drm_device *dev, void *data, struct drm_file *file_priv) -{ - static drm_magic_t sequence = 0; - struct drm_auth *auth = data; - - /* Find unique magic */ - if (file_priv->magic) { - auth->magic = file_priv->magic; - } else { - DRM_LOCK(); - do { - int old = sequence; - - auth->magic = old+1; - - if (!atomic_cmpset_int(&sequence, old, auth->magic)) - continue; - } while (drm_find_file(dev, auth->magic)); - file_priv->magic = auth->magic; - drm_add_magic(dev, file_priv, auth->magic); - DRM_UNLOCK(); - } - - DRM_DEBUG("%u\n", auth->magic); - - return 0; -} - -/** - * Marks the client associated with the given magic number as authenticated. - */ -int drm_authmagic(struct drm_device *dev, void *data, - struct drm_file *file_priv) -{ - struct drm_auth *auth = data; - struct drm_file *priv; - - DRM_DEBUG("%u\n", auth->magic); - - DRM_LOCK(); - priv = drm_find_file(dev, auth->magic); - if (priv != NULL) { - priv->authenticated = 1; - drm_remove_magic(dev, auth->magic); - DRM_UNLOCK(); - return 0; - } else { - DRM_UNLOCK(); - return EINVAL; - } -} |