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Add doxygen and fix whitespace for drm_auth.c

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Eric Anholt 2007-08-13 10:50:25 -07:00
parent 263775c454
commit 3b07a37a48
1 changed files with 25 additions and 3 deletions
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28
bsd-core/drm_auth.c
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@ -1,4 +1,4 @@
/* drm_auth.h -- IOCTLs for authentication -*- linux-c -*-
/* drm_auth.c -- IOCTLs for authentication -*- linux-c -*-
* Created: Tue Feb 2 08:37:54 1999 by faith@valinux.com
*/
/*-
@ -38,6 +38,9 @@ static int drm_hash_magic(drm_magic_t magic)
return magic & (DRM_HASH_SIZE-1);
}
/**
* Returns the file private associated with the given magic number.
*/
static drm_file_t *drm_find_file(drm_device_t *dev, drm_magic_t magic)
{
drm_magic_entry_t *pt;
@ -54,6 +57,10 @@ static drm_file_t *drm_find_file(drm_device_t *dev, drm_magic_t magic)
return NULL;
}
/**
* Inserts the given magic number into the hash table of used magic number
* lists.
*/
static int drm_add_magic(drm_device_t *dev, drm_file_t *priv, drm_magic_t magic)
{
int hash;
@ -83,6 +90,10 @@ static int drm_add_magic(drm_device_t *dev, drm_file_t *priv, drm_magic_t magic)
return 0;
}
/**
* Removes the given magic number from the hash table of used magic number
* lists.
*/
static int drm_remove_magic(drm_device_t *dev, drm_magic_t magic)
{
drm_magic_entry_t *prev = NULL;
@ -113,6 +124,14 @@ static int drm_remove_magic(drm_device_t *dev, drm_magic_t magic)
return EINVAL;
}
/**
* Called by the client, this returns a unique magic number to be authorized
* by the master.
*
* The master may use its own knowledge of the client (such as the X
* connection that the magic is passed over) to determine if the magic number
* should be authenticated.
*/
int drm_getmagic(drm_device_t *dev, void *data, struct drm_file *file_priv)
{
static drm_magic_t sequence = 0;
@ -125,9 +144,9 @@ int drm_getmagic(drm_device_t *dev, void *data, struct drm_file *file_priv)
DRM_LOCK();
do {
int old = sequence;
auth->magic = old+1;
if (!atomic_cmpset_int(&sequence, old, auth->magic))
continue;
} while (drm_find_file(dev, auth->magic));
@ -141,6 +160,9 @@ int drm_getmagic(drm_device_t *dev, void *data, struct drm_file *file_priv)
return 0;
}
/**
* Marks the client associated with the given magic number as authenticated.
*/
int drm_authmagic(drm_device_t *dev, void *data, struct drm_file *file_priv)
{
drm_auth_t *auth = data;