drm_auth.c File Reference

#include <drm/drmP.h>

Go to the source code of this file.

Functions
int	drm_remove_magic (struct drm_master *master, drm_magic_t magic)
int	drm_getmagic (struct drm_device *dev, void *data, struct drm_file *file_priv)
int	drm_authmagic (struct drm_device *dev, void *data, struct drm_file *file_priv)

Detailed Description

IOCTLs for authentication

Author

Rickard E. (Rik) Faith faith.nosp@m.@val.nosp@m.inux..nosp@m.com

Gareth Hughes garet.nosp@m.h@va.nosp@m.linux.nosp@m..com

Definition in file drm_auth.c.

Function Documentation

int drm_authmagic	(	struct drm_device *	dev,
		void *	data,
		struct drm_file *	file_priv
	)

Authenticate with a magic.

Parameters

inode	device inode.
file_priv	DRM file private.
cmd	command.
arg	pointer to a drm_auth structure.

Returns

zero if authentication successed, or a negative number otherwise.

Checks if file_priv is associated with the magic number passed in

• . This ioctl needs protection by the drm_global_mutex, which protects struct drm_file::magic and struct drm_magic_entry::priv.

Definition at line 181 of file drm_auth.c.

int drm_getmagic	(	struct drm_device *	dev,
		void *	data,
		struct drm_file *	file_priv
	)

Get a unique magic number (ioctl).

Parameters

inode	device inode.
file_priv	DRM file private.
cmd	command.
arg	pointer to a resulting drm_auth structure.

Returns

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 file_priv. This ioctl needs protection by the drm_global_mutex, which protects struct drm_file::magic and struct drm_magic_entry::priv.

Definition at line 142 of file drm_auth.c.

int drm_remove_magic	(	struct drm_master *	master,
		drm_magic_t	magic
	)

Remove a magic number.

Parameters

dev	DRM device.
magic	magic number.

Searches and unlinks the entry in drm_device::magiclist with the magic number hash key, while holding the drm_device::struct_mutex lock.

Definition at line 104 of file drm_auth.c.