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V4L/DVB (10135): v4l2: introduce v4l2_file_operations.

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Introduce a struct v4l2_file_operations for v4l2 drivers.

Remove the unnecessary inode argument.

Move compat32 handling (and llseek) into the v4l2-dev core: this is now
handled in the v4l2 core and no longer in the drivers themselves.

Note that this changeset reverts an earlier patch that changed the return
type of__video_ioctl2 from int to long. This change will be reinstated
later in a much improved version.

Signed-off-by: Hans Verkuil <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>
This commit is contained in:
Hans Verkuil 2008-12-30 06:58:20 -03:00 • committed by Mauro Carvalho Chehab
commit bec43661b1
83 changed files with 331 additions and 572 deletions
Download patch file Download diff file Expand all files Collapse all files

2
include/media/saa7146_vv.h
View file

@ -179,7 +179,7 @@ struct saa7146_ext_vv
struct saa7146_extension_ioctls *ioctls;
int (*ioctl)(struct saa7146_fh*, unsigned int cmd, void *arg);
struct file_operations vbi_fops;
struct v4l2_file_operations vbi_fops;
};
struct saa7146_use_ops {

15
include/media/v4l2-dev.h
View file

@ -25,6 +25,7 @@
#define VFL_TYPE_MAX 4
struct v4l2_ioctl_callbacks;
struct video_device;
struct v4l2_device;
/* Flag to mark the video_device struct as unregistered.
@ -32,6 +33,18 @@ struct v4l2_device;
device access. It is set by video_unregister_device. */
#define V4L2_FL_UNREGISTERED (0)
struct v4l2_file_operations {
struct module *owner;
ssize_t (*read) (struct file *, char __user *, size_t, loff_t *);
ssize_t (*write) (struct file *, const char __user *, size_t, loff_t *);
unsigned int (*poll) (struct file *, struct poll_table_struct *);
int (*ioctl) (struct file *, unsigned int, unsigned long);
long (*unlocked_ioctl) (struct file *, unsigned int, unsigned long);
int (*mmap) (struct file *, struct vm_area_struct *);
int (*open) (struct file *);
int (*release) (struct file *);
};
/*
* Newer version of video_device, handled by videodev2.c
* This version moves redundant code from video device code to
@ -41,7 +54,7 @@ struct v4l2_device;
struct video_device
{
/* device ops */
const struct file_operations *fops;
const struct v4l2_file_operations *fops;
/* sysfs */
struct device dev; /* v4l device */

15
include/media/v4l2-ioctl.h
View file

@ -286,27 +286,18 @@ int v4l_compat_translate_ioctl(struct file *file,
#define v4l_compat_translate_ioctl(file, cmd, arg, ioctl) (-EINVAL)
#endif
#ifdef CONFIG_COMPAT
/* 32 Bits compatibility layer for 64 bits processors */
extern long v4l_compat_ioctl32(struct file *file, unsigned int cmd,
unsigned long arg);
#endif
/* Include support for obsoleted stuff */
extern int video_usercopy(struct file *file, unsigned int cmd,
unsigned long arg, v4l2_kioctl func);
/* Standard handlers for V4L ioctl's */
/* This prototype is used on fops.unlocked_ioctl */
extern long __video_ioctl2(struct file *file,
unsigned int cmd, unsigned long arg);
/* This prototype is used on fops.ioctl
* Since fops.ioctl enables Kernel Big Lock, it is preferred
* to use __video_ioctl2 instead.
* It should be noticed that there's no lock code inside
* video_ioctl2().
*/
extern int video_ioctl2(struct inode *inode, struct file *file,
extern int video_ioctl2(struct file *file,
unsigned int cmd, unsigned long arg);
#endif /* _V4L2_IOCTL_H */