aboutsummaryrefslogtreecommitdiff
path: root/nx-X11/extras/drm/linux/drm_auth.h
diff options
context:
space:
mode:
Diffstat (limited to 'nx-X11/extras/drm/linux/drm_auth.h')
-rw-r--r--nx-X11/extras/drm/linux/drm_auth.h230
1 files changed, 0 insertions, 230 deletions
diff --git a/nx-X11/extras/drm/linux/drm_auth.h b/nx-X11/extras/drm/linux/drm_auth.h
deleted file mode 100644
index fe099871a..000000000
--- a/nx-X11/extras/drm/linux/drm_auth.h
+++ /dev/null
@@ -1,230 +0,0 @@
-/**
- * \file drm_auth.h
- * IOCTLs for authentication
- *
- * \author Rickard E. (Rik) Faith <faith@valinux.com>
- * \author Gareth Hughes <gareth@valinux.com>
- */
-
-/*
- * 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.
- */
-
-#include "drmP.h"
-
-/**
- * Generate a hash key from a magic.
- *
- * \param magic magic.
- * \return hash key.
- *
- * The key is the modulus of the hash table size, #DRM_HASH_SIZE, which must be
- * a power of 2.
- */
-static int DRM(hash_magic)(drm_magic_t magic)
-{
- return magic & (DRM_HASH_SIZE-1);
-}
-
-/**
- * Find the file with the given magic number.
- *
- * \param dev DRM device.
- * \param magic magic number.
- *
- * Searches in drm_device::magiclist within all files with the same hash key
- * the one with matching magic number, while holding the drm_device::struct_sem
- * lock.
- */
-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);
-
- down(&dev->struct_sem);
- for (pt = dev->magiclist[hash].head; pt; pt = pt->next) {
- if (pt->magic == magic) {
- retval = pt->priv;
- break;
- }
- }
- up(&dev->struct_sem);
- return retval;
-}
-
-/**
- * Adds a magic number.
- *
- * \param dev DRM device.
- * \param priv file private data.
- * \param magic magic number.
- *
- * Creates a drm_magic_entry structure and appends to the linked list
- * associated the magic number hash key in drm_device::magiclist, while holding
- * the drm_device::struct_sem lock.
- */
-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;
- memset(entry, 0, sizeof(*entry));
- entry->magic = magic;
- entry->priv = priv;
- entry->next = NULL;
-
- down(&dev->struct_sem);
- 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;
- }
- up(&dev->struct_sem);
-
- return 0;
-}
-
-/**
- * Remove a magic number.
- *
- * \param dev DRM device.
- * \param magic magic number.
- *
- * Searches and unlinks the entry in drm_device::magiclist with the magic
- * number hash key, while holding the drm_device::struct_sem lock.
- */
-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);
-
- down(&dev->struct_sem);
- 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;
- }
- up(&dev->struct_sem);
- return 0;
- }
- }
- up(&dev->struct_sem);
-
- DRM(free)(pt, sizeof(*pt), DRM_MEM_MAGIC);
-
- return -EINVAL;
-}
-
-/**
- * Get a unique magic number (ioctl).
- *
- * \param inode device inode.
- * \param filp file pointer.
- * \param cmd command.
- * \param arg pointer to a resulting drm_auth structure.
- * \return zero on success, or a negative number on failure.
- *
- * If there is a magic number in drm_file::magic then use it, otherwise
- * searches an unique non-zero magic number and add it associating it with \p
- * filp.
- */
-int DRM(getmagic)(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
-{
- static drm_magic_t sequence = 0;
- static spinlock_t lock = SPIN_LOCK_UNLOCKED;
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->dev;
- drm_auth_t auth;
-
- /* Find unique magic */
- if (priv->magic) {
- auth.magic = priv->magic;
- } else {
- do {
- spin_lock(&lock);
- if (!sequence) ++sequence; /* reserve 0 */
- auth.magic = sequence++;
- spin_unlock(&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);
- if (copy_to_user((drm_auth_t __user *)arg, &auth, sizeof(auth)))
- return -EFAULT;
- return 0;
-}
-
-/**
- * Authenticate with a magic.
- *
- * \param inode device inode.
- * \param filp file pointer.
- * \param cmd command.
- * \param arg pointer to a drm_auth structure.
- * \return zero if authentication successed, or a negative number otherwise.
- *
- * Checks if \p filp is associated with the magic number passed in \arg.
- */
-int DRM(authmagic)(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
-{
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->dev;
- drm_auth_t auth;
- drm_file_t *file;
-
- if (copy_from_user(&auth, (drm_auth_t __user *)arg, sizeof(auth)))
- return -EFAULT;
- 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;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-14 01:27:55 +0000