diff options
Diffstat (limited to 'bsd/drm/auth.c')
| -rw-r--r-- | bsd/drm/auth.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/bsd/drm/auth.c b/bsd/drm/auth.c new file mode 100644 index 00000000..f7b3bc49 --- /dev/null +++ b/bsd/drm/auth.c @@ -0,0 +1,168 @@ +/* auth.c -- IOCTLs for authentication -*- c -*- + * Created: Tue Feb 2 08:37:54 1999 by faith@precisioninsight.com + * Revised: Fri Aug 20 11:31:48 1999 by faith@precisioninsight.com + * + * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. + * 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 + * PRECISION INSIGHT 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. + * + * $PI: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/auth.c,v 1.4 1999/08/30 13:05:00 faith Exp $ + * $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/auth.c,v 1.1 1999/09/25 14:37:57 dawes Exp $ + * + */ + +#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); + + lockmgr(&dev->dev_lock, LK_EXCLUSIVE, 0, curproc); + for (pt = dev->magiclist[hash].head; pt; pt = pt->next) { + if (pt->priv->authenticated) continue; + if (pt->magic == magic) { + retval = pt->priv; + break; + } + } + lockmgr(&dev->dev_lock, LK_RELEASE, 0, curproc); + + 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_alloc(sizeof(*entry), DRM_MEM_MAGIC); + if (!entry) return ENOMEM; + entry->magic = magic; + entry->priv = priv; + entry->next = NULL; + + lockmgr(&dev->dev_lock, LK_EXCLUSIVE, 0, curproc); + 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; + } + lockmgr(&dev->dev_lock, LK_RELEASE, 0, curproc); + + 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); + + lockmgr(&dev->dev_lock, LK_EXCLUSIVE, 0, curproc); + 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; + } + lockmgr(&dev->dev_lock, LK_RELEASE, 0, curproc); + return 0; + } + } + lockmgr(&dev->dev_lock, LK_RELEASE, 0, curproc); + + drm_free(pt, sizeof(*pt), DRM_MEM_MAGIC); + + return EINVAL; +} + +int drm_getmagic(dev_t kdev, u_long cmd, caddr_t data, + int flags, struct proc *p) +{ + static drm_magic_t sequence = 0; +#if 0 + static struct simplelock lock; /* XXX */ +#endif + drm_device_t *dev = kdev->si_drv1; + drm_file_t *priv; + drm_auth_t auth; + + /* Find unique magic */ + priv = drm_find_file_by_proc(dev, p); + if (!priv) { + DRM_DEBUG("can't find file structure\n"); + return EINVAL; + } + if (priv->magic) { + auth.magic = priv->magic; + } else { + simple_lock(&lock); + do { + if (!sequence) ++sequence; /* reserve 0 */ + auth.magic = sequence++; + } while (drm_find_file(dev, auth.magic)); + simple_unlock(&lock); + priv->magic = auth.magic; + drm_add_magic(dev, priv, auth.magic); + } + + DRM_DEBUG("%u\n", auth.magic); + *(drm_auth_t *) data = auth; + return 0; +} + +int drm_authmagic(dev_t kdev, u_long cmd, caddr_t data, + int flags, struct proc *p) +{ + drm_device_t *dev = kdev->si_drv1; + drm_auth_t auth; + drm_file_t *file; + + auth = *(drm_auth_t *) data; + 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; + } + return EINVAL; +} |