1 /* drm_auth.h -- IOCTLs for authentication -*- linux-c -*-
2 * Created: Tue Feb 2 08:37:54 1999 by faith@valinux.com
4 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
5 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
15 * The above copyright notice and this permission notice (including the next
16 * paragraph) shall be included in all copies or substantial portions of the
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
23 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
24 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
25 * OTHER DEALINGS IN THE SOFTWARE.
28 * Rickard E. (Rik) Faith <faith@valinux.com>
29 * Gareth Hughes <gareth@valinux.com>
34 #define __NO_VERSION__
35 #include "dev/drm/drmP.h"
37 static int DRM(hash_magic)(drm_magic_t magic)
39 return magic & (DRM_HASH_SIZE-1);
42 static drm_file_t *DRM(find_file)(drm_device_t *dev, drm_magic_t magic)
44 drm_file_t *retval = NULL;
45 drm_magic_entry_t *pt;
46 int hash = DRM(hash_magic)(magic);
49 for (pt = dev->magiclist[hash].head; pt; pt = pt->next) {
50 if (pt->magic == magic) {
59 int DRM(add_magic)(drm_device_t *dev, drm_file_t *priv, drm_magic_t magic)
62 drm_magic_entry_t *entry;
64 DRM_DEBUG("%d\n", magic);
66 hash = DRM(hash_magic)(magic);
67 entry = (drm_magic_entry_t*) DRM(alloc)(sizeof(*entry), DRM_MEM_MAGIC);
68 if (!entry) return DRM_OS_ERR(ENOMEM);
74 if (dev->magiclist[hash].tail) {
75 dev->magiclist[hash].tail->next = entry;
76 dev->magiclist[hash].tail = entry;
78 dev->magiclist[hash].head = entry;
79 dev->magiclist[hash].tail = entry;
86 int DRM(remove_magic)(drm_device_t *dev, drm_magic_t magic)
88 drm_magic_entry_t *prev = NULL;
89 drm_magic_entry_t *pt;
92 DRM_DEBUG("%d\n", magic);
93 hash = DRM(hash_magic)(magic);
96 for (pt = dev->magiclist[hash].head; pt; prev = pt, pt = pt->next) {
97 if (pt->magic == magic) {
98 if (dev->magiclist[hash].head == pt) {
99 dev->magiclist[hash].head = pt->next;
101 if (dev->magiclist[hash].tail == pt) {
102 dev->magiclist[hash].tail = prev;
105 prev->next = pt->next;
109 DRM(free)(pt, sizeof(*pt), DRM_MEM_MAGIC);
110 #endif /* __FreeBSD__ */
116 DRM(free)(pt, sizeof(*pt), DRM_MEM_MAGIC);
117 return DRM_OS_ERR(EINVAL);
120 int DRM(getmagic)(DRM_OS_IOCTL)
122 static drm_magic_t sequence = 0;
125 static spinlock_t lock = SPIN_LOCK_UNLOCKED;
126 #endif /* __linux__ */
128 static DRM_OS_SPINTYPE lock;
129 static int first = 1;
130 #endif /* __FreeBSD__ */
136 DRM_OS_SPININIT(lock, "drm getmagic");
139 #endif /* __FreeBSD__ */
141 /* Find unique magic */
143 auth.magic = priv->magic;
146 DRM_OS_SPINLOCK(&lock);
147 if (!sequence) ++sequence; /* reserve 0 */
148 auth.magic = sequence++;
149 DRM_OS_SPINUNLOCK(&lock);
150 } while (DRM(find_file)(dev, auth.magic));
151 priv->magic = auth.magic;
152 DRM(add_magic)(dev, priv, auth.magic);
155 DRM_DEBUG("%u\n", auth.magic);
157 DRM_OS_KRNTOUSR((drm_auth_t *)data, auth, sizeof(auth));
162 int DRM(authmagic)(DRM_OS_IOCTL)
168 DRM_OS_KRNFROMUSR(auth, (drm_auth_t *)data, sizeof(auth));
170 DRM_DEBUG("%u\n", auth.magic);
171 if ((file = DRM(find_file)(dev, auth.magic))) {
172 file->authenticated = 1;
173 DRM(remove_magic)(dev, auth.magic);
176 return DRM_OS_ERR(EINVAL);