patch-2.4.8 linux/drivers/char/drm/auth.c

• Lines: 163
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.4.7/linux/drivers/char/drm/auth.c
• Orig date: Tue Aug 29 14:09:15 2000

diff -u --recursive --new-file v2.4.7/linux/drivers/char/drm/auth.c linux/drivers/char/drm/auth.c
@@ -1,162 +0,0 @@
-/* auth.c -- IOCTLs for authentication -*- linux-c -*-
- * Created: Tue Feb  2 08:37:54 1999 by faith@precisioninsight.com
- *
- * 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
- * PRECISION INSIGHT 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>
- *
- */
-
-#define __NO_VERSION__
-#include "drmP.h"
-
-static int drm_hash_magic(drm_magic_t magic)
-{
-	return magic & (DRM_HASH_SIZE-1);
-}
-
-static drm_file_t *drm_find_file(drm_device_t *dev, drm_magic_t magic)
-{
-	drm_file_t	  *retval = NULL;
-	drm_magic_entry_t *pt;
-	int		  hash	  = drm_hash_magic(magic);
-
-	down(&dev->struct_sem);
-	for (pt = dev->magiclist[hash].head; pt; pt = pt->next) {
-		if (pt->magic == magic) {
-			retval = pt->priv;
-			break;
-		}
-	}
-	up(&dev->struct_sem);
-	return retval;
-}
-
-int drm_add_magic(drm_device_t *dev, drm_file_t *priv, drm_magic_t magic)
-{
-	int		  hash;
-	drm_magic_entry_t *entry;
-	
-	DRM_DEBUG("%d\n", magic);
-	
-	hash	     = drm_hash_magic(magic);
-	entry	     = drm_alloc(sizeof(*entry), DRM_MEM_MAGIC);
-	if (!entry) return -ENOMEM;
-	entry->magic = magic;
-	entry->priv  = priv;
-	entry->next  = NULL;
-
-	down(&dev->struct_sem);
-	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;
-	}
-	up(&dev->struct_sem);
-	
-	return 0;
-}
-
-int drm_remove_magic(drm_device_t *dev, drm_magic_t magic)
-{
-	drm_magic_entry_t *prev = NULL;
-	drm_magic_entry_t *pt;
-	int		  hash;
-	
-	DRM_DEBUG("%d\n", magic);
-	hash = drm_hash_magic(magic);
-	
-	down(&dev->struct_sem);
-	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;
-			}
-			up(&dev->struct_sem);
-			return 0;
-		}
-	}
-	up(&dev->struct_sem);
-
-	drm_free(pt, sizeof(*pt), DRM_MEM_MAGIC);
-	
-	return -EINVAL;
-}
-
-int drm_getmagic(struct inode *inode, struct file *filp, unsigned int cmd,
-		 unsigned long arg)
-{
-	static drm_magic_t sequence = 0;
-	static spinlock_t  lock	    = SPIN_LOCK_UNLOCKED;
-	drm_file_t	   *priv    = filp->private_data;
-	drm_device_t	   *dev	    = priv->dev;
-	drm_auth_t	   auth;
-
-				/* Find unique magic */
-	if (priv->magic) {
-		auth.magic = priv->magic;
-	} else {
-		do {
-			spin_lock(&lock);
-			if (!sequence) ++sequence; /* reserve 0 */
-			auth.magic = sequence++;
-			spin_unlock(&lock);
-		} while (drm_find_file(dev, auth.magic));
-		priv->magic = auth.magic;
-		drm_add_magic(dev, priv, auth.magic);
-	}
-	
-	DRM_DEBUG("%u\n", auth.magic);
-	if (copy_to_user((drm_auth_t *)arg, &auth, sizeof(auth)))
-		return -EFAULT;
-	return 0;
-}
-
-int drm_authmagic(struct inode *inode, struct file *filp, unsigned int cmd,
-		  unsigned long arg)
-{
-	drm_file_t	   *priv    = filp->private_data;
-	drm_device_t	   *dev	    = priv->dev;
-	drm_auth_t	   auth;
-	drm_file_t	   *file;
-
-	if (copy_from_user(&auth, (drm_auth_t *)arg, sizeof(auth)))
-		return -EFAULT;
-	DRM_DEBUG("%u\n", auth.magic);
-	if ((file = drm_find_file(dev, auth.magic))) {
-		file->authenticated = 1;
-		drm_remove_magic(dev, auth.magic);
-		return 0;
-	}
-	return -EINVAL;
-}