1450N/A/*
1450N/A * Copyright (c) 2006, 2011, Oracle and/or its affiliates. All rights reserved.
1450N/A */
1450N/A
1450N/A/*
1450N/A * drm_auth.h -- IOCTLs for authentication -*- linux-c -*-
1450N/A * Created: Tue Feb 2 08:37:54 1999 by faith@valinux.com
1450N/A */
1450N/A/*
1450N/A * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
1450N/A * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
1450N/A * All Rights Reserved.
1450N/A *
1450N/A * Permission is hereby granted, free of charge, to any person obtaining a
1450N/A * copy of this software and associated documentation files (the "Software"),
1450N/A * to deal in the Software without restriction, including without limitation
1450N/A * the rights to use, copy, modify, merge, publish, distribute, sublicense,
1450N/A * and/or sell copies of the Software, and to permit persons to whom the
1450N/A * Software is furnished to do so, subject to the following conditions:
1450N/A *
1450N/A * The above copyright notice and this permission notice (including the next
1450N/A * paragraph) shall be included in all copies or substantial portions of the
1450N/A * Software.
1450N/A *
1450N/A * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
1450N/A * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
1450N/A * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
1450N/A * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
1450N/A * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
1450N/A * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
1450N/A * OTHER DEALINGS IN THE SOFTWARE.
1450N/A *
1450N/A * Authors:
1450N/A * Rickard E. (Rik) Faith <faith@valinux.com>
1450N/A * Gareth Hughes <gareth@valinux.com>
1450N/A *
1450N/A */
1450N/A
1450N/A#include "drmP.h"
1450N/A
1450N/Astatic int
1450N/Adrm_hash_magic(drm_magic_t magic)
1450N/A{
1450N/A return (magic & (DRM_HASH_SIZE-1));
1450N/A}
1450N/A
1450N/Adrm_file_t *
1450N/Adrm_find_file(drm_device_t *dev, drm_magic_t magic)
1450N/A{
1450N/A drm_file_t *retval = NULL;
1450N/A drm_magic_entry_t *pt;
1450N/A int hash;
1450N/A
1450N/A hash = drm_hash_magic(magic);
1450N/A for (pt = dev->magiclist[hash].head; pt; pt = pt->next) {
1450N/A if (pt->magic == magic) {
1450N/A retval = pt->priv;
1450N/A break;
1450N/A }
1450N/A }
1450N/A
1450N/A return (retval);
1450N/A}
1450N/A
1450N/Astatic int
1450N/Adrm_add_magic(drm_device_t *dev, drm_file_t *priv, drm_magic_t magic)
1450N/A{
1450N/A int hash;
1450N/A drm_magic_entry_t *entry;
1450N/A
1450N/A hash = drm_hash_magic(magic);
1450N/A entry = drm_alloc(sizeof (*entry), DRM_MEM_MAGIC);
1450N/A if (!entry)
1450N/A return (ENOMEM);
1450N/A entry->magic = magic;
1450N/A entry->priv = priv;
1450N/A entry->next = NULL;
1450N/A
1450N/A DRM_LOCK();
1450N/A if (dev->magiclist[hash].tail) {
1450N/A dev->magiclist[hash].tail->next = entry;
1450N/A dev->magiclist[hash].tail = entry;
1450N/A } else {
1450N/A dev->magiclist[hash].head = entry;
1450N/A dev->magiclist[hash].tail = entry;
1450N/A }
1450N/A DRM_UNLOCK();
1450N/A
1450N/A return (0);
1450N/A}
1450N/A
1450N/Aint
1450N/Adrm_remove_magic(drm_device_t *dev, drm_magic_t magic)
1450N/A{
1450N/A drm_magic_entry_t *prev = NULL;
1450N/A drm_magic_entry_t *pt;
1450N/A int hash;
1450N/A
1450N/A DRM_DEBUG("drm_remove_magic : %d", magic);
1450N/A hash = drm_hash_magic(magic);
1450N/A
1450N/A DRM_LOCK();
1450N/A for (pt = dev->magiclist[hash].head; pt; prev = pt, pt = pt->next) {
1450N/A if (pt->magic == magic) {
1450N/A if (dev->magiclist[hash].head == pt) {
1450N/A dev->magiclist[hash].head = pt->next;
1450N/A }
1450N/A if (dev->magiclist[hash].tail == pt) {
1450N/A dev->magiclist[hash].tail = prev;
1450N/A }
1450N/A if (prev) {
1450N/A prev->next = pt->next;
1450N/A }
1450N/A DRM_UNLOCK();
1450N/A drm_free(pt, sizeof (*pt), DRM_MEM_MAGIC);
1450N/A return (0);
1450N/A }
1450N/A }
1450N/A DRM_UNLOCK();
1450N/A
1450N/A return (EINVAL);
1450N/A}
1450N/A
1450N/A/*ARGSUSED*/
1450N/Aint
1450N/Adrm_getmagic(DRM_IOCTL_ARGS)
1450N/A{
1450N/A DRM_DEVICE;
1450N/A static drm_magic_t sequence = 0;
1450N/A drm_auth_t auth;
1450N/A
1450N/A /* Find unique magic */
1450N/A if (fpriv->magic) {
1450N/A auth.magic = fpriv->magic;
1450N/A } else {
1450N/A do {
1450N/A int old = sequence;
1450N/A auth.magic = old+1;
1450N/A if (!atomic_cmpset_int(&sequence, old, auth.magic))
1450N/A continue;
1450N/A } while (drm_find_file(dev, auth.magic));
1450N/A fpriv->magic = auth.magic;
1450N/A (void) drm_add_magic(dev, fpriv, auth.magic);
1450N/A }
1450N/A
1450N/A
1450N/A DRM_DEBUG("drm_getmagic: %u", auth.magic);
1450N/A
1450N/A DRM_COPYTO_WITH_RETURN((void *)data, &auth, sizeof (auth));
1450N/A
1450N/A return (0);
1450N/A}
1450N/A
1450N/A/*ARGSUSED*/
1450N/Aint
1450N/Adrm_authmagic(DRM_IOCTL_ARGS)
1450N/A{
1450N/A drm_auth_t auth;
1450N/A drm_file_t *file;
1450N/A DRM_DEVICE;
1450N/A
1450N/A DRM_COPYFROM_WITH_RETURN(&auth, (void *)data, sizeof (auth));
1450N/A
1450N/A if ((file = drm_find_file(dev, auth.magic))) {
1450N/A file->authenticated = 1;
1450N/A (void) drm_remove_magic(dev, auth.magic);
1450N/A return (0);
1450N/A }
1450N/A return (EINVAL);
1450N/A}