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-rw-r--r--bsd-core/drm_auth.c166
1 files changed, 166 insertions, 0 deletions
diff --git a/bsd-core/drm_auth.c b/bsd-core/drm_auth.c
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+/* 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);
+}