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1da177e4 LT |
1 | /* |
2 | * Created: Tue Feb 2 08:37:54 1999 by faith@valinux.com | |
3 | * | |
4 | * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. | |
5 | * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. | |
6 | * All Rights Reserved. | |
7 | * | |
32e7b94a DH |
8 | * Author Rickard E. (Rik) Faith <faith@valinux.com> |
9 | * Author Gareth Hughes <gareth@valinux.com> | |
10 | * | |
1da177e4 LT |
11 | * Permission is hereby granted, free of charge, to any person obtaining a |
12 | * copy of this software and associated documentation files (the "Software"), | |
13 | * to deal in the Software without restriction, including without limitation | |
14 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
15 | * and/or sell copies of the Software, and to permit persons to whom the | |
16 | * Software is furnished to do so, subject to the following conditions: | |
17 | * | |
18 | * The above copyright notice and this permission notice (including the next | |
19 | * paragraph) shall be included in all copies or substantial portions of the | |
20 | * Software. | |
21 | * | |
22 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
23 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
24 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
25 | * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
26 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
27 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
28 | * OTHER DEALINGS IN THE SOFTWARE. | |
29 | */ | |
30 | ||
760285e7 | 31 | #include <drm/drmP.h> |
67d0ec4e | 32 | #include "drm_internal.h" |
1da177e4 | 33 | |
1da177e4 | 34 | /** |
32e7b94a DH |
35 | * drm_getmagic - Get unique magic of a client |
36 | * @dev: DRM device to operate on | |
37 | * @data: ioctl data containing the drm_auth object | |
38 | * @file_priv: DRM file that performs the operation | |
1da177e4 | 39 | * |
32e7b94a DH |
40 | * This looks up the unique magic of the passed client and returns it. If the |
41 | * client did not have a magic assigned, yet, a new one is registered. The magic | |
42 | * is stored in the passed drm_auth object. | |
1da177e4 | 43 | * |
32e7b94a | 44 | * Returns: 0 on success, negative error code on failure. |
1da177e4 | 45 | */ |
c153f45f | 46 | int drm_getmagic(struct drm_device *dev, void *data, struct drm_file *file_priv) |
1da177e4 | 47 | { |
c153f45f | 48 | struct drm_auth *auth = data; |
32e7b94a | 49 | int ret = 0; |
1da177e4 | 50 | |
32e7b94a DH |
51 | mutex_lock(&dev->struct_mutex); |
52 | if (!file_priv->magic) { | |
53 | ret = idr_alloc(&file_priv->master->magic_map, file_priv, | |
54 | 1, 0, GFP_KERNEL); | |
55 | if (ret >= 0) | |
56 | file_priv->magic = ret; | |
1da177e4 | 57 | } |
32e7b94a DH |
58 | auth->magic = file_priv->magic; |
59 | mutex_unlock(&dev->struct_mutex); | |
1da177e4 | 60 | |
c153f45f EA |
61 | DRM_DEBUG("%u\n", auth->magic); |
62 | ||
32e7b94a | 63 | return ret < 0 ? ret : 0; |
1da177e4 LT |
64 | } |
65 | ||
66 | /** | |
32e7b94a DH |
67 | * drm_authmagic - Authenticate client with a magic |
68 | * @dev: DRM device to operate on | |
69 | * @data: ioctl data containing the drm_auth object | |
70 | * @file_priv: DRM file that performs the operation | |
1da177e4 | 71 | * |
32e7b94a | 72 | * This looks up a DRM client by the passed magic and authenticates it. |
1da177e4 | 73 | * |
32e7b94a | 74 | * Returns: 0 on success, negative error code on failure. |
1da177e4 | 75 | */ |
c153f45f EA |
76 | int drm_authmagic(struct drm_device *dev, void *data, |
77 | struct drm_file *file_priv) | |
1da177e4 | 78 | { |
c153f45f | 79 | struct drm_auth *auth = data; |
84b1fd10 | 80 | struct drm_file *file; |
1da177e4 | 81 | |
c153f45f | 82 | DRM_DEBUG("%u\n", auth->magic); |
32e7b94a DH |
83 | |
84 | mutex_lock(&dev->struct_mutex); | |
85 | file = idr_find(&file_priv->master->magic_map, auth->magic); | |
86 | if (file) { | |
1da177e4 | 87 | file->authenticated = 1; |
32e7b94a | 88 | idr_replace(&file_priv->master->magic_map, NULL, auth->magic); |
1da177e4 | 89 | } |
32e7b94a DH |
90 | mutex_unlock(&dev->struct_mutex); |
91 | ||
92 | return file ? 0 : -EINVAL; | |
1da177e4 | 93 | } |