Initial revision

1 files changed, 166 insertions, 0 deletions

diff --git a/bsd-core/drm_auth.c b/bsd-core/drm_auth.c
new file mode 100644
index 00000000..f2c2d8da
--- /dev/null
+++ b/bsd-core/drm_auth.c
@@ -0,0 +1,166 @@
+/* drm_auth.h -- IOCTLs for authentication -*- linux-c -*-
+ * Created: Tue Feb  2 08:37:54 1999 by faith@valinux.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
+ * 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>
+ */
+
+#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);
+
+	DRM_OS_LOCK;
+	for (pt = dev->magiclist[hash].head; pt; pt = pt->next) {
+		if (pt->magic == magic) {
+			retval = pt->priv;
+			break;
+		}
+	}
+	DRM_OS_UNLOCK;
+	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_magic_entry_t*) DRM(alloc)(sizeof(*entry), DRM_MEM_MAGIC);
+	if (!entry) DRM_OS_RETURN(ENOMEM);
+	entry->magic = magic;
+	entry->priv  = priv;
+	entry->next  = NULL;
+
+	DRM_OS_LOCK;
+	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;
+	}
+	DRM_OS_UNLOCK;
+
+	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);
+
+	DRM_OS_LOCK;
+	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;
+			}
+			DRM_OS_UNLOCK;
+			DRM(free)(pt, sizeof(*pt), DRM_MEM_MAGIC);
+			return 0;
+		}
+	}
+	DRM_OS_UNLOCK;
+
+	DRM(free)(pt, sizeof(*pt), DRM_MEM_MAGIC);
+	DRM_OS_RETURN(EINVAL);
+}
+
+int DRM(getmagic)(DRM_OS_IOCTL)
+{
+	static drm_magic_t sequence = 0;
+	drm_auth_t	   auth;
+	static DRM_OS_SPINTYPE lock;
+	static int	   first = 1;
+	DRM_OS_DEVICE;
+	DRM_OS_PRIV;
+
+	if (first) {
+		DRM_OS_SPININIT(lock, "drm getmagic");
+		first = 0;
+	}
+
+				/* Find unique magic */
+	if (priv->magic) {
+		auth.magic = priv->magic;
+	} else {
+		do {
+			DRM_OS_SPINLOCK(&lock);
+			if (!sequence) ++sequence; /* reserve 0 */
+			auth.magic = sequence++;
+			DRM_OS_SPINUNLOCK(&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);
+
+	DRM_OS_KRNTOUSR((drm_auth_t *)data, auth, sizeof(auth));
+
+	return 0;
+}
+
+int DRM(authmagic)(DRM_OS_IOCTL)
+{
+	drm_auth_t	   auth;
+	drm_file_t	   *file;
+	DRM_OS_DEVICE;
+
+	DRM_OS_KRNFROMUSR(auth, (drm_auth_t *)data, sizeof(auth));
+
+	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;
+	}
+	DRM_OS_RETURN(EINVAL);
+}