#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.
*
* the one with matching magic number, while holding the drm_device::struct_mutex
* lock.
*/
-static drm_file_t *drm_find_file(drm_device_t * dev, drm_magic_t magic)
+static struct drm_file *drm_find_file(struct drm_device * dev, drm_magic_t magic)
{
- drm_file_t *retval = NULL;
- drm_magic_entry_t *pt;
- int hash = drm_hash_magic(magic);
+ struct drm_file *retval = NULL;
+ struct drm_magic_entry *pt;
+ struct drm_hash_item *hash;
mutex_lock(&dev->struct_mutex);
- for (pt = dev->magiclist[hash].head; pt; pt = pt->next) {
- if (pt->magic == magic) {
- retval = pt->priv;
- break;
- }
+ if (!drm_ht_find_item(&dev->magiclist, (unsigned long)magic, &hash)) {
+ pt = drm_hash_entry(hash, struct drm_magic_entry, hash_item);
+ retval = pt->priv;
}
mutex_unlock(&dev->struct_mutex);
return retval;
* associated the magic number hash key in drm_device::magiclist, while holding
* the drm_device::struct_mutex lock.
*/
-static int drm_add_magic(drm_device_t * dev, drm_file_t * priv,
+static int drm_add_magic(struct drm_device * dev, struct drm_file * priv,
drm_magic_t magic)
{
- int hash;
- drm_magic_entry_t *entry;
+ struct drm_magic_entry *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;
+ entry->hash_item.key = (unsigned long)magic;
mutex_lock(&dev->struct_mutex);
- 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;
- }
+ drm_ht_insert_item(&dev->magiclist, &entry->hash_item);
+ list_add_tail(&entry->head, &dev->magicfree);
mutex_unlock(&dev->struct_mutex);
return 0;
* Searches and unlinks the entry in drm_device::magiclist with the magic
* number hash key, while holding the drm_device::struct_mutex lock.
*/
-static int drm_remove_magic(drm_device_t * dev, drm_magic_t magic)
+static int drm_remove_magic(struct drm_device * dev, drm_magic_t magic)
{
- drm_magic_entry_t *prev = NULL;
- drm_magic_entry_t *pt;
- int hash;
+ struct drm_magic_entry *pt;
+ struct drm_hash_item *hash;
DRM_DEBUG("%d\n", magic);
- hash = drm_hash_magic(magic);
mutex_lock(&dev->struct_mutex);
- 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;
- }
- mutex_unlock(&dev->struct_mutex);
- return 0;
- }
+ if (drm_ht_find_item(&dev->magiclist, (unsigned long)magic, &hash)) {
+ mutex_unlock(&dev->struct_mutex);
+ return -EINVAL;
}
+ pt = drm_hash_entry(hash, struct drm_magic_entry, hash_item);
+ drm_ht_remove_item(&dev->magiclist, hash);
+ list_del(&pt->head);
mutex_unlock(&dev->struct_mutex);
drm_free(pt, sizeof(*pt), DRM_MEM_MAGIC);
- return -EINVAL;
+ return 0;
}
/**
* Get a unique magic number (ioctl).
*
* \param inode device inode.
- * \param filp file pointer.
+ * \param file_priv DRM file private.
* \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.
+ * file_priv.
*/
-int drm_getmagic(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
+int drm_getmagic(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
static drm_magic_t sequence = 0;
static DEFINE_SPINLOCK(lock);
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->head->dev;
- drm_auth_t auth;
+ struct drm_auth *auth = data;
/* Find unique magic */
- if (priv->magic) {
- auth.magic = priv->magic;
+ if (file_priv->magic) {
+ auth->magic = file_priv->magic;
} else {
do {
spin_lock(&lock);
if (!sequence)
++sequence; /* reserve 0 */
- auth.magic = sequence++;
+ auth->magic = sequence++;
spin_unlock(&lock);
- } while (drm_find_file(dev, auth.magic));
- priv->magic = auth.magic;
- drm_add_magic(dev, priv, auth.magic);
+ } while (drm_find_file(dev, auth->magic));
+ file_priv->magic = auth->magic;
+ drm_add_magic(dev, file_priv, auth->magic);
}
- DRM_DEBUG("%u\n", auth.magic);
- if (copy_to_user((drm_auth_t __user *) arg, &auth, sizeof(auth)))
- return -EFAULT;
+ DRM_DEBUG("%u\n", auth->magic);
+
return 0;
}
* Authenticate with a magic.
*
* \param inode device inode.
- * \param filp file pointer.
+ * \param file_priv DRM file private.
* \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.
+ * Checks if \p file_priv is associated with the magic number passed in \arg.
*/
-int drm_authmagic(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
+int drm_authmagic(struct drm_device *dev, void *data,
+ struct drm_file *file_priv)
{
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->head->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))) {
+ struct drm_auth *auth = data;
+ struct drm_file *file;
+
+ DRM_DEBUG("%u\n", auth->magic);
+ if ((file = drm_find_file(dev, auth->magic))) {
file->authenticated = 1;
- drm_remove_magic(dev, auth.magic);
+ drm_remove_magic(dev, auth->magic);
return 0;
}
return -EINVAL;
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