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Subject[RFC][2.5] generic_usercopy() function (resend, forgot the patches)
Hello all,

especially the Video4Linux-driver rely intensively on the
video_usercopy() function, which handles the copying of userspace
arguments of ioctls with a simply callback mechanism.

Recently the dvb-core has been added which needs the same function.
Because of the fact that the core is independent of Video4Linux, the
code was duplicated to a dvb_usercopy() function.

In order to prevent this code duplication, introducing a
generic_usercopy() function to lib/ is one possibilty.

The appended 4 patches do the following:

01-introduce.diff:
- remove video_usercopy() from videodev.c
- add generic_usercopy() to "lib/usecopy.c" and update the build system

02-video.diff:
- change all users of video_usercopy() to use generic_usercopy() instead

03-radio.diff:
- change all users of video_usercopy() to use generic_usercopy() instead

04-dvb.diff
- remove dvb_usercopy() from the dvb core and fix it to use
generic_usercopy() instead.

The diffs are against 2.5.69.

Comments are very appreciated. 8-)
Is there a possibility to get this into the kernel?

CU
Michael.

diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/video/videodev.c linux-2.5.69.usercopy/drivers/media/video/videodev.c
--- linux-2.5.69/drivers/media/video/videodev.c 2003-05-06 13:16:21.000000000 +0200
+++ linux-2.5.69.usercopy/drivers/media/video/videodev.c 2003-05-23 10:14:27.000000000 +0200
@@ -29,6 +29,7 @@
#include <linux/kmod.h>
#include <linux/slab.h>
#include <linux/devfs_fs_kernel.h>
+#include <linux/usercopy.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <asm/semaphore.h>
@@ -109,67 +109,6 @@
}

/*
- * helper function -- handles userspace copying for ioctl arguments
- */
-int
-video_usercopy(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg,
- int (*func)(struct inode *inode, struct file *file,
- unsigned int cmd, void *arg))
-{
- char sbuf[128];
- void *mbuf = NULL;
- void *parg = NULL;
- int err = -EINVAL;
-
- /* Copy arguments into temp kernel buffer */
- switch (_IOC_DIR(cmd)) {
- case _IOC_NONE:
- parg = (void *)arg;
- break;
- case _IOC_READ: /* some v4l ioctls are marked wrong ... */
- case _IOC_WRITE:
- case (_IOC_WRITE | _IOC_READ):
- if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
- parg = sbuf;
- } else {
- /* too big to allocate from stack */
- mbuf = kmalloc(_IOC_SIZE(cmd),GFP_KERNEL);
- if (NULL == mbuf)
- return -ENOMEM;
- parg = mbuf;
- }
-
- err = -EFAULT;
- if (copy_from_user(parg, (void *)arg, _IOC_SIZE(cmd)))
- goto out;
- break;
- }
-
- /* call driver */
- err = func(inode, file, cmd, parg);
- if (err == -ENOIOCTLCMD)
- err = -EINVAL;
- if (err < 0)
- goto out;
-
- /* Copy results into user buffer */
- switch (_IOC_DIR(cmd))
- {
- case _IOC_READ:
- case (_IOC_WRITE | _IOC_READ):
- if (copy_to_user((void *)arg, parg, _IOC_SIZE(cmd)))
- err = -EFAULT;
- break;
- }
-
-out:
- if (mbuf)
- kfree(mbuf);
- return err;
-}
-
-/*
* open/release helper functions -- handle exclusive opens
*/
extern int video_exclusive_open(struct inode *inode, struct file *file)
@@ -506,7 +445,6 @@
EXPORT_SYMBOL(video_register_device);
EXPORT_SYMBOL(video_unregister_device);
EXPORT_SYMBOL(video_devdata);
-EXPORT_SYMBOL(video_usercopy);
EXPORT_SYMBOL(video_exclusive_open);
EXPORT_SYMBOL(video_exclusive_release);

diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/include/linux/usercopy.h linux-2.5.69.usercopy/include/linux/usercopy.h
--- linux-2.5.69/include/linux/usercopy.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.5.69.usercopy/include/linux/usercopy.h 2003-05-23 09:55:17.000000000 +0200
@@ -0,0 +1,12 @@
+#ifndef _LINUX_USERCOPY_H
+#define _LINUX_USERCOPY_H
+
+#include <linux/types.h>
+
+int
+generic_usercopy(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg,
+ int (*func)(struct inode *inode, struct file *file,
+ unsigned int cmd, void *arg));
+
+#endif /* _LINUX_USERCOPY_H */
diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/include/linux/videodev.h linux-2.5.69.usercopy/include/linux/videodev.h
--- linux-2.5.69/include/linux/videodev.h 2003-05-06 13:16:43.000000000 +0200
+++ linux-2.5.69.usercopy/include/linux/videodev.h 2003-05-23 10:15:51.000000000 +0200
@@ -20,6 +20,7 @@

#include <linux/poll.h>
#include <linux/mm.h>
+#include <linux/usercopy.h>

struct video_device
{
diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/lib/Kconfig linux-2.5.69.usercopy/lib/Kconfig
--- linux-2.5.69/lib/Kconfig 2003-04-07 19:31:46.000000000 +0200
+++ linux-2.5.69.usercopy/lib/Kconfig 2003-05-23 09:58:53.000000000 +0200
@@ -12,6 +12,15 @@
kernel tree does. Such modules that use library CRC32 functions
require M here.

+config USERCOPY
+ tristate "Generic usercopy function"
+ help
+ This option is provided for the case where no in-kernel-tree
+ modules require the generic usercopy function for copying
+ ioctl arguments from user space to kernel space, but a module
+ built outside the kernel tree does. Such modules that use
+ this function require M here.
+
#
# Do we need the compression support?
#
diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/lib/Makefile linux-2.5.69.usercopy/lib/Makefile
--- linux-2.5.69/lib/Makefile 2003-05-06 13:15:51.000000000 +0200
+++ linux-2.5.69.usercopy/lib/Makefile 2003-05-23 10:26:37.000000000 +0200
@@ -21,6 +21,7 @@
endif

obj-$(CONFIG_CRC32) += crc32.o
+obj-$(CONFIG_USERCOPY) += usercopy.o

obj-$(CONFIG_ZLIB_INFLATE) += zlib_inflate/
obj-$(CONFIG_ZLIB_DEFLATE) += zlib_deflate/
@@ -29,6 +30,9 @@
include $(TOPDIR)/drivers/usb/Makefile.lib
include $(TOPDIR)/fs/Makefile.lib
include $(TOPDIR)/net/bluetooth/bnep/Makefile.lib
+include $(TOPDIR)/drivers/media/video/Makefile.lib
+include $(TOPDIR)/drivers/media/common/Makefile.lib
+include $(TOPDIR)/drivers/media/dvb/dvb-core/Makefile.lib

host-progs := gen_crc32table
clean-files := crc32table.h
diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/lib/usercopy.c linux-2.5.69.usercopy/lib/usercopy.c
--- linux-2.5.69/lib/usercopy.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.5.69.usercopy/lib/usercopy.c 2003-05-23 10:46:43.000000000 +0200
@@ -0,0 +1,71 @@
+#include <linux/types.h>
+#include <linux/version.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <asm/uaccess.h>
+
+#include <linux/usercopy.h>
+
+/*
+ * helper function -- handles userspace copying for ioctl arguments
+ */
+
+int
+generic_usercopy(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg,
+ int (*func)(struct inode *inode, struct file *file,
+ unsigned int cmd, void *arg))
+{
+ char sbuf[128];
+ void *mbuf = NULL;
+ void *parg = NULL;
+ int err = -EINVAL;
+
+ /* Copy arguments into temp kernel buffer */
+ switch (_IOC_DIR(cmd)) {
+ case _IOC_NONE:
+ parg = (void *)arg;
+ break;
+ case _IOC_READ: /* some v4l ioctls are marked wrong ... */
+ case _IOC_WRITE:
+ case (_IOC_WRITE | _IOC_READ):
+ if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
+ parg = sbuf;
+ } else {
+ /* too big to allocate from stack */
+ mbuf = kmalloc(_IOC_SIZE(cmd),GFP_KERNEL);
+ if (NULL == mbuf)
+ return -ENOMEM;
+ parg = mbuf;
+ }
+
+ err = -EFAULT;
+ if (copy_from_user(parg, (void *)arg, _IOC_SIZE(cmd)))
+ goto out;
+ break;
+ }
+
+ /* call driver */
+ err = func(inode, file, cmd, parg);
+ if (err == -ENOIOCTLCMD)
+ err = -EINVAL;
+ if (err < 0)
+ goto out;
+
+ /* Copy results into user buffer */
+ switch (_IOC_DIR(cmd))
+ {
+ case _IOC_READ:
+ case (_IOC_WRITE | _IOC_READ):
+ if (copy_to_user((void *)arg, parg, _IOC_SIZE(cmd)))
+ err = -EFAULT;
+ break;
+ }
+
+out:
+ if (mbuf)
+ kfree(mbuf);
+ return err;
+}
+
+EXPORT_SYMBOL(generic_usercopy);diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/video/Makefile.lib linux-2.5.69.usercopy/drivers/media/video/Makefile.lib
--- linux-2.5.69/drivers/media/video/Makefile.lib 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.5.69.usercopy/drivers/media/video/Makefile.lib 2003-05-23 10:59:20.000000000 +0200
@@ -0,0 +1,11 @@
+# These drivers all require usercopy.o
+obj-$(CONFIG_VIDEODEV) += usercopy.o
+obj-$(CONFIG_VIDEO_SAA7134) += usercopy.o
+obj-$(CONFIG_VIDEO_BT848) += usercopy.o
+obj-$(CONFIG_VIDEO_PMS) += usercopy.o
+obj-$(CONFIG_VIDEO_W9966) += usercopy.o
+obj-$(CONFIG_VIDEO_BWQCAM) += usercopy.o
+obj-$(CONFIG_VIDEO_CQCAM) += usercopy.o
+obj-$(CONFIG_VIDEO_MEYE) += usercopy.o
+obj-$(CONFIG_VIDEO_CPIA) += usercopy.o
+obj-$(CONFIG_VIDEO_SAA5249) += usercopy.o
+
diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/video/bttv-driver.c linux-2.5.69.usercopy/drivers/media/video/bttv-driver.c
--- linux-2.5.69/drivers/media/video/bttv-driver.c 2003-05-06 13:16:20.000000000 +0200
+++ linux-2.5.69.usercopy/drivers/media/video/bttv-driver.c 2003-05-23 10:14:27.000000000 +0200
@@ -2592,7 +2592,7 @@
bttv_switch_type(fh,V4L2_BUF_TYPE_VBI_CAPTURE);
return fh->lines * 2 * 2048;
default:
- return video_usercopy(inode, file, cmd, arg, bttv_do_ioctl);
+ return generic_usercopy(inode, file, cmd, arg, bttv_do_ioctl);
}
}

@@ -2903,7 +2903,7 @@
static int radio_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
- return video_usercopy(inode, file, cmd, arg, radio_do_ioctl);
+ return generic_usercopy(inode, file, cmd, arg, radio_do_ioctl);
}

static struct file_operations radio_fops =
diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/video/bw-qcam.c linux-2.5.69.usercopy/drivers/media/video/bw-qcam.c
--- linux-2.5.69/drivers/media/video/bw-qcam.c 2003-04-07 19:30:57.000000000 +0200
+++ linux-2.5.69.usercopy/drivers/media/video/bw-qcam.c 2003-05-23 10:14:27.000000000 +0200
@@ -855,7 +855,7 @@
static int qcam_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
- return video_usercopy(inode, file, cmd, arg, qcam_do_ioctl);
+ return generic_usercopy(inode, file, cmd, arg, qcam_do_ioctl);
}

static int qcam_read(struct file *file, char *buf,
diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/video/c-qcam.c linux-2.5.69.usercopy/drivers/media/video/c-qcam.c
--- linux-2.5.69/drivers/media/video/c-qcam.c 2003-04-07 19:31:14.000000000 +0200
+++ linux-2.5.69.usercopy/drivers/media/video/c-qcam.c 2003-05-23 10:14:27.000000000 +0200
@@ -665,7 +665,7 @@
static int qcam_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
- return video_usercopy(inode, file, cmd, arg, qcam_do_ioctl);
+ return generic_usercopy(inode, file, cmd, arg, qcam_do_ioctl);
}

static int qcam_read(struct file *file, char *buf,
diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/video/cpia.c linux-2.5.69.usercopy/drivers/media/video/cpia.c
--- linux-2.5.69/drivers/media/video/cpia.c 2003-05-06 13:16:20.000000000 +0200
+++ linux-2.5.69.usercopy/drivers/media/video/cpia.c 2003-05-23 10:14:27.000000000 +0200
@@ -3740,7 +3740,7 @@
static int cpia_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
- return video_usercopy(inode, file, cmd, arg, cpia_do_ioctl);
+ return generic_usercopy(inode, file, cmd, arg, cpia_do_ioctl);
}


diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/video/meye.c linux-2.5.69.usercopy/drivers/media/video/meye.c
--- linux-2.5.69/drivers/media/video/meye.c 2003-05-06 13:16:20.000000000 +0200
+++ linux-2.5.69.usercopy/drivers/media/video/meye.c 2003-05-23 10:14:27.000000000 +0200
@@ -1169,7 +1169,7 @@
static int meye_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
- return video_usercopy(inode, file, cmd, arg, meye_do_ioctl);
+ return generic_usercopy(inode, file, cmd, arg, meye_do_ioctl);
}

static int meye_mmap(struct file *file, struct vm_area_struct *vma) {
diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/video/pms.c linux-2.5.69.usercopy/drivers/media/video/pms.c
--- linux-2.5.69/drivers/media/video/pms.c 2003-04-07 19:32:26.000000000 +0200
+++ linux-2.5.69.usercopy/drivers/media/video/pms.c 2003-05-23 10:14:27.000000000 +0200
@@ -858,7 +858,7 @@
static int pms_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
- return video_usercopy(inode, file, cmd, arg, pms_do_ioctl);
+ return generic_usercopy(inode, file, cmd, arg, pms_do_ioctl);
}

static int pms_read(struct file *file, char *buf,
diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/video/saa5249.c linux-2.5.69.usercopy/drivers/media/video/saa5249.c
--- linux-2.5.69/drivers/media/video/saa5249.c 2003-05-06 13:16:21.000000000 +0200
+++ linux-2.5.69.usercopy/drivers/media/video/saa5249.c 2003-05-23 10:14:27.000000000 +0200
@@ -602,7 +602,7 @@
int err;

down(&t->lock);
- err = video_usercopy(inode,file,cmd,arg,do_saa5249_ioctl);
+ err = generic_usercopy(inode,file,cmd,arg,do_saa5249_ioctl);
up(&t->lock);
return err;
}
diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/video/saa7134/saa7134-ts.c linux-2.5.69.usercopy/drivers/media/video/saa7134/saa7134-ts.c
--- linux-2.5.69/drivers/media/video/saa7134/saa7134-ts.c 2003-05-06 13:16:21.000000000 +0200
+++ linux-2.5.69.usercopy/drivers/media/video/saa7134/saa7134-ts.c 2003-05-23 10:14:26.000000000 +0200
@@ -371,7 +371,7 @@
static int ts_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
- return video_usercopy(inode, file, cmd, arg, ts_do_ioctl);
+ return generic_usercopy(inode, file, cmd, arg, ts_do_ioctl);
}


diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/video/saa7134/saa7134-video.c linux-2.5.69.usercopy/drivers/media/video/saa7134/saa7134-video.c
--- linux-2.5.69/drivers/media/video/saa7134/saa7134-video.c 2003-05-06 13:16:21.000000000 +0200
+++ linux-2.5.69.usercopy/drivers/media/video/saa7134/saa7134-video.c 2003-05-23 10:14:26.000000000 +0200
@@ -1815,7 +1815,7 @@
static int video_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
- return video_usercopy(inode, file, cmd, arg, video_do_ioctl);
+ return generic_usercopy(inode, file, cmd, arg, video_do_ioctl);
}

static int radio_do_ioctl(struct inode *inode, struct file *file,
@@ -1916,7 +1916,7 @@
static int radio_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
- return video_usercopy(inode, file, cmd, arg, radio_do_ioctl);
+ return generic_usercopy(inode, file, cmd, arg, radio_do_ioctl);
}

static struct file_operations video_fops =
diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/video/w9966.c linux-2.5.69.usercopy/drivers/media/video/w9966.c
--- linux-2.5.69/drivers/media/video/w9966.c 2003-05-06 13:16:21.000000000 +0200
+++ linux-2.5.69.usercopy/drivers/media/video/w9966.c 2003-05-23 10:14:27.000000000 +0200
@@ -863,7 +863,7 @@
static int w9966_v4l_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
- return video_usercopy(inode, file, cmd, arg, w9966_v4l_do_ioctl);
+ return generic_usercopy(inode, file, cmd, arg, w9966_v4l_do_ioctl);
}

// Capture data
diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/common/Makefile.lib linux-2.5.69.usercopy/drivers/media/common/Makefile.lib
--- linux-2.5.69/drivers/media/common/Makefile.lib 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.5.69.usercopy/drivers/media/common/Makefile.lib 2003-05-23 10:32:37.000000000 +0200
@@ -0,0 +1 @@
+obj-$(CONFIG_VIDEO_SAA7146) += usercopy.o
diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/common/saa7146_fops.c linux-2.5.69.usercopy/drivers/media/common/saa7146_fops.c
--- linux-2.5.69/drivers/media/common/saa7146_fops.c 2003-05-06 13:15:30.000000000 +0200
+++ linux-2.5.69.usercopy/drivers/media/common/saa7146_fops.c 2003-05-23 10:14:28.000000000 +0200
@@ -259,7 +259,7 @@
/*
DEB_EE(("inode:%p, file:%p, cmd:%d, arg:%li\n",inode, file, cmd, arg));
*/
- return video_usercopy(inode, file, cmd, arg, saa7146_video_do_ioctl);
+ return generic_usercopy(inode, file, cmd, arg, saa7146_video_do_ioctl);
}

static int fops_mmap(struct file *file, struct vm_area_struct * vma)diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/radio/Makefile.lib linux-2.5.69.usercopy/drivers/media/radio/Makefile.lib
--- linux-2.5.69/drivers/media/radio/Makefile.lib 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.5.69.usercopy/drivers/media/radio/Makefile.lib 2003-05-23 11:02:26.000000000 +0200
@@ -0,0 +1,15 @@
+# These drivers all require usercopy.o
+obj-$(CONFIG_RADIO_GEMTEK) += usercopy.o
+obj-$(CONFIG_RADIO_GEMTEK_PCI) += usercopy.o
+obj-$(CONFIG_RADIO_MIROPCM20) += usercopy.o
+obj-$(CONFIG_RADIO_RTRACK) += usercopy.o
+obj-$(CONFIG_RADIO_RTRACK2) += usercopy.o
+obj-$(CONFIG_RADIO_TYPHOON) += usercopy.o
+obj-$(CONFIG_RADIO_TERRATEC) += usercopy.o
+obj-$(CONFIG_RADIO_CADET) += usercopy.o
+obj-$(CONFIG_RADIO_TRUST) += usercopy.o
+obj-$(CONFIG_RADIO_MAESTRO) += usercopy.o
+obj-$(CONFIG_RADIO_SF16FMI) += usercopy.o
+obj-$(CONFIG_RADIO_MAXIRADIO) += usercopy.o
+obj-$(CONFIG_RADIO_ZOLTRIX) += usercopy.o
+obj-$(CONFIG_RADIO_AZTECH) += usercopy.o
diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/radio/miropcm20-radio.c linux-2.5.69.usercopy/drivers/media/radio/miropcm20-radio.c
--- linux-2.5.69/drivers/media/radio/miropcm20-radio.c 2003-04-07 19:30:58.000000000 +0200
+++ linux-2.5.69.usercopy/drivers/media/radio/miropcm20-radio.c 2003-05-23 10:14:27.000000000 +0200
@@ -213,7 +213,7 @@
static int pcm20_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
- return video_usercopy(inode, file, cmd, arg, pcm20_do_ioctl);
+ return generic_usercopy(inode, file, cmd, arg, pcm20_do_ioctl);
}

static struct pcm20_device pcm20_unit = {
diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/radio/radio-aimslab.c linux-2.5.69.usercopy/drivers/media/radio/radio-aimslab.c
--- linux-2.5.69/drivers/media/radio/radio-aimslab.c 2003-04-07 19:30:58.000000000 +0200
+++ linux-2.5.69.usercopy/drivers/media/radio/radio-aimslab.c 2003-05-23 10:14:27.000000000 +0200
@@ -294,7 +294,7 @@
static int rt_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
- return video_usercopy(inode, file, cmd, arg, rt_do_ioctl);
+ return generic_usercopy(inode, file, cmd, arg, rt_do_ioctl);
}

static struct rt_device rtrack_unit;
diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/radio/radio-aztech.c linux-2.5.69.usercopy/drivers/media/radio/radio-aztech.c
--- linux-2.5.69/drivers/media/radio/radio-aztech.c 2003-04-07 19:33:03.000000000 +0200
+++ linux-2.5.69.usercopy/drivers/media/radio/radio-aztech.c 2003-05-23 10:14:27.000000000 +0200
@@ -246,7 +246,7 @@
static int az_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
- return video_usercopy(inode, file, cmd, arg, az_do_ioctl);
+ return generic_usercopy(inode, file, cmd, arg, az_do_ioctl);
}

static struct az_device aztech_unit;
diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/radio/radio-cadet.c linux-2.5.69.usercopy/drivers/media/radio/radio-cadet.c
--- linux-2.5.69/drivers/media/radio/radio-cadet.c 2003-05-06 13:15:33.000000000 +0200
+++ linux-2.5.69.usercopy/drivers/media/radio/radio-cadet.c 2003-05-23 10:14:27.000000000 +0200
@@ -471,7 +471,7 @@
static int cadet_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
- return video_usercopy(inode, file, cmd, arg, cadet_do_ioctl);
+ return generic_usercopy(inode, file, cmd, arg, cadet_do_ioctl);
}

static int cadet_open(struct inode *inode, struct file *file)
diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/radio/radio-gemtek-pci.c linux-2.5.69.usercopy/drivers/media/radio/radio-gemtek-pci.c
--- linux-2.5.69/drivers/media/radio/radio-gemtek-pci.c 2003-04-07 19:30:41.000000000 +0200
+++ linux-2.5.69.usercopy/drivers/media/radio/radio-gemtek-pci.c 2003-05-23 10:14:27.000000000 +0200
@@ -275,7 +275,7 @@
static int gemtek_pci_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
- return video_usercopy(inode, file, cmd, arg, gemtek_pci_do_ioctl);
+ return generic_usercopy(inode, file, cmd, arg, gemtek_pci_do_ioctl);
}

enum {
diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/radio/radio-gemtek.c linux-2.5.69.usercopy/drivers/media/radio/radio-gemtek.c
--- linux-2.5.69/drivers/media/radio/radio-gemtek.c 2003-04-07 19:30:32.000000000 +0200
+++ linux-2.5.69.usercopy/drivers/media/radio/radio-gemtek.c 2003-05-23 10:14:27.000000000 +0200
@@ -223,7 +223,7 @@
static int gemtek_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
- return video_usercopy(inode, file, cmd, arg, gemtek_do_ioctl);
+ return generic_usercopy(inode, file, cmd, arg, gemtek_do_ioctl);
}

static struct gemtek_device gemtek_unit;
diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/radio/radio-maestro.c linux-2.5.69.usercopy/drivers/media/radio/radio-maestro.c
--- linux-2.5.69/drivers/media/radio/radio-maestro.c 2003-04-07 19:31:50.000000000 +0200
+++ linux-2.5.69.usercopy/drivers/media/radio/radio-maestro.c 2003-05-23 10:14:27.000000000 +0200
@@ -265,7 +265,7 @@
int ret;

down(&card->lock);
- ret = video_usercopy(inode, file, cmd, arg, radio_function);
+ ret = generic_usercopy(inode, file, cmd, arg, radio_function);
up(&card->lock);
return ret;
}
diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/radio/radio-maxiradio.c linux-2.5.69.usercopy/drivers/media/radio/radio-maxiradio.c
--- linux-2.5.69/drivers/media/radio/radio-maxiradio.c 2003-04-07 19:32:51.000000000 +0200
+++ linux-2.5.69.usercopy/drivers/media/radio/radio-maxiradio.c 2003-05-23 10:14:27.000000000 +0200
@@ -274,7 +274,7 @@
int ret;

down(&card->lock);
- ret = video_usercopy(inode, file, cmd, arg, radio_function);
+ ret = generic_usercopy(inode, file, cmd, arg, radio_function);
up(&card->lock);
return ret;
}
diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/radio/radio-rtrack2.c linux-2.5.69.usercopy/drivers/media/radio/radio-rtrack2.c
--- linux-2.5.69/drivers/media/radio/radio-rtrack2.c 2003-04-07 19:31:56.000000000 +0200
+++ linux-2.5.69.usercopy/drivers/media/radio/radio-rtrack2.c 2003-05-23 10:14:27.000000000 +0200
@@ -189,7 +189,7 @@
static int rt_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
- return video_usercopy(inode, file, cmd, arg, rt_do_ioctl);
+ return generic_usercopy(inode, file, cmd, arg, rt_do_ioctl);
}

static struct rt_device rtrack2_unit;
diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/radio/radio-sf16fmi.c linux-2.5.69.usercopy/drivers/media/radio/radio-sf16fmi.c
--- linux-2.5.69/drivers/media/radio/radio-sf16fmi.c 2003-04-07 19:32:48.000000000 +0200
+++ linux-2.5.69.usercopy/drivers/media/radio/radio-sf16fmi.c 2003-05-23 10:14:27.000000000 +0200
@@ -217,7 +217,7 @@
static int fmi_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
- return video_usercopy(inode, file, cmd, arg, fmi_do_ioctl);
+ return generic_usercopy(inode, file, cmd, arg, fmi_do_ioctl);
}

static struct fmi_device fmi_unit;
diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/radio/radio-terratec.c linux-2.5.69.usercopy/drivers/media/radio/radio-terratec.c
--- linux-2.5.69/drivers/media/radio/radio-terratec.c 2003-04-07 19:31:10.000000000 +0200
+++ linux-2.5.69.usercopy/drivers/media/radio/radio-terratec.c 2003-05-23 10:14:27.000000000 +0200
@@ -266,7 +266,7 @@
static int tt_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
- return video_usercopy(inode, file, cmd, arg, tt_do_ioctl);
+ return generic_usercopy(inode, file, cmd, arg, tt_do_ioctl);
}

static struct tt_device terratec_unit;
diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/radio/radio-trust.c linux-2.5.69.usercopy/drivers/media/radio/radio-trust.c
--- linux-2.5.69/drivers/media/radio/radio-trust.c 2003-04-07 19:31:18.000000000 +0200
+++ linux-2.5.69.usercopy/drivers/media/radio/radio-trust.c 2003-05-23 10:14:27.000000000 +0200
@@ -247,7 +247,7 @@
static int tr_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
- return video_usercopy(inode, file, cmd, arg, tr_do_ioctl);
+ return generic_usercopy(inode, file, cmd, arg, tr_do_ioctl);
}

static struct file_operations trust_fops = {
diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/radio/radio-typhoon.c linux-2.5.69.usercopy/drivers/media/radio/radio-typhoon.c
--- linux-2.5.69/drivers/media/radio/radio-typhoon.c 2003-04-07 19:31:05.000000000 +0200
+++ linux-2.5.69.usercopy/drivers/media/radio/radio-typhoon.c 2003-05-23 10:14:27.000000000 +0200
@@ -246,7 +246,7 @@
static int typhoon_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
- return video_usercopy(inode, file, cmd, arg, typhoon_do_ioctl);
+ return generic_usercopy(inode, file, cmd, arg, typhoon_do_ioctl);
}

static struct typhoon_device typhoon_unit =
diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/radio/radio-zoltrix.c linux-2.5.69.usercopy/drivers/media/radio/radio-zoltrix.c
--- linux-2.5.69/drivers/media/radio/radio-zoltrix.c 2003-04-07 19:33:02.000000000 +0200
+++ linux-2.5.69.usercopy/drivers/media/radio/radio-zoltrix.c 2003-05-23 10:14:27.000000000 +0200
@@ -313,7 +313,7 @@
static int zol_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
- return video_usercopy(inode, file, cmd, arg, zol_do_ioctl);
+ return generic_usercopy(inode, file, cmd, arg, zol_do_ioctl);
}

static struct zol_device zoltrix_unit;diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/dvb/dvb-core/Makefile.lib linux-2.5.69.usercopy/drivers/media/dvb/dvb-core/Makefile.lib
--- linux-2.5.69/drivers/media/dvb/dvb-core/Makefile.lib 2003-05-06 13:15:32.000000000 +0200
+++ linux-2.5.69.usercopy/drivers/media/dvb/dvb-core/Makefile.lib 2003-05-23 10:42:12.000000000 +0200
@@ -1 +1 @@
-obj-$(CONFIG_DVB_CORE) += crc32.o
+obj-$(CONFIG_DVB_CORE) += crc32.o usercopy.o
diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/dvb/dvb-core/dmxdev.c linux-2.5.69.usercopy/drivers/media/dvb/dvb-core/dmxdev.c
--- linux-2.5.69/drivers/media/dvb/dvb-core/dmxdev.c 2003-05-06 13:15:32.000000000 +0200
+++ linux-2.5.69.usercopy/drivers/media/dvb/dvb-core/dmxdev.c 2003-05-23 10:17:57.000000000 +0200
@@ -983,7 +983,7 @@
static int dvb_demux_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
- return dvb_usercopy(inode, file, cmd, arg, dvb_demux_do_ioctl);
+ return generic_usercopy(inode, file, cmd, arg, dvb_demux_do_ioctl);
}


@@ -1064,7 +1064,7 @@
static int dvb_dvr_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
- return dvb_usercopy(inode, file, cmd, arg, dvb_dvr_do_ioctl);
+ return generic_usercopy(inode, file, cmd, arg, dvb_dvr_do_ioctl);
}


diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/dvb/dvb-core/dvb_ksyms.c linux-2.5.69.usercopy/drivers/media/dvb/dvb-core/dvb_ksyms.c
--- linux-2.5.69/drivers/media/dvb/dvb-core/dvb_ksyms.c 2003-05-06 13:15:32.000000000 +0200
+++ linux-2.5.69.usercopy/drivers/media/dvb/dvb-core/dvb_ksyms.c 2003-05-23 10:17:57.000000000 +0200
@@ -8,70 +8,6 @@
#include "dvb_demux.h"
#include "dvb_net.h"

-/* if the miracle happens and "generic_usercopy()" is included into
- the kernel, then this can vanish. please don't make the mistake and
- define this as video_usercopy(). this will introduce a dependecy
- to the v4l "videodev.o" module, which is unnecessary for some
- cards (ie. the budget dvb-cards don't need the v4l module...) */
-int dvb_usercopy(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg,
- int (*func)(struct inode *inode, struct file *file,
- unsigned int cmd, void *arg))
-{
- char sbuf[128];
- void *mbuf = NULL;
- void *parg = NULL;
- int err = -EINVAL;
-
- /* Copy arguments into temp kernel buffer */
- switch (_IOC_DIR(cmd)) {
- case _IOC_NONE:
- parg = (void *)arg;
- break;
- case _IOC_READ: /* some v4l ioctls are marked wrong ... */
- case _IOC_WRITE:
- case (_IOC_WRITE | _IOC_READ):
- if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
- parg = sbuf;
- } else {
- /* too big to allocate from stack */
- mbuf = kmalloc(_IOC_SIZE(cmd),GFP_KERNEL);
- if (NULL == mbuf)
- return -ENOMEM;
- parg = mbuf;
- }
-
- err = -EFAULT;
- if (copy_from_user(parg, (void *)arg, _IOC_SIZE(cmd)))
- goto out;
- break;
- }
-
- /* call driver */
- if ((err = func(inode, file, cmd, parg)) == -ENOIOCTLCMD)
- err = -EINVAL;
-
- if (err < 0)
- goto out;
-
- /* Copy results into user buffer */
- switch (_IOC_DIR(cmd))
- {
- case _IOC_READ:
- case (_IOC_WRITE | _IOC_READ):
- if (copy_to_user((void *)arg, parg, _IOC_SIZE(cmd)))
- err = -EFAULT;
- break;
- }
-
-out:
- if (mbuf)
- kfree(mbuf);
-
- return err;
-}
-EXPORT_SYMBOL(dvb_usercopy);
-
EXPORT_SYMBOL(dvb_dmxdev_init);
EXPORT_SYMBOL(dvb_dmxdev_release);
EXPORT_SYMBOL(dvb_dmx_init);
diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/dvb/dvb-core/dvb_net.c linux-2.5.69.usercopy/drivers/media/dvb/dvb-core/dvb_net.c
--- linux-2.5.69/drivers/media/dvb/dvb-core/dvb_net.c 2003-05-06 13:15:32.000000000 +0200
+++ linux-2.5.69.usercopy/drivers/media/dvb/dvb-core/dvb_net.c 2003-05-23 10:17:57.000000000 +0200
@@ -535,7 +535,7 @@
dvb_net_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
- return dvb_usercopy(inode, file, cmd, arg, dvb_net_do_ioctl);
+ return generic_usercopy(inode, file, cmd, arg, dvb_net_do_ioctl);
}

static struct file_operations dvb_net_fops = {
diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/dvb/dvb-core/dvbdev.c linux-2.5.69.usercopy/drivers/media/dvb/dvb-core/dvbdev.c
--- linux-2.5.69/drivers/media/dvb/dvb-core/dvbdev.c 2003-05-06 13:16:20.000000000 +0200
+++ linux-2.5.69.usercopy/drivers/media/dvb/dvb-core/dvbdev.c 2003-05-23 10:20:15.000000000 +0200
@@ -160,7 +160,7 @@
if (!dvbdev->kernel_ioctl)
return -EINVAL;

- return dvb_usercopy (inode, file, cmd, arg, dvbdev->kernel_ioctl);
+ return generic_usercopy (inode, file, cmd, arg, dvbdev->kernel_ioctl);
}


diff -uNrwB -x '.*' -x '*.o' -x '*.mod' --new-file linux-2.5.69/drivers/media/dvb/dvb-core/dvbdev.h linux-2.5.69.usercopy/drivers/media/dvb/dvb-core/dvbdev.h
--- linux-2.5.69/drivers/media/dvb/dvb-core/dvbdev.h 2003-05-06 13:16:20.000000000 +0200
+++ linux-2.5.69.usercopy/drivers/media/dvb/dvb-core/dvbdev.h 2003-05-23 10:20:25.000000000 +0200
@@ -29,6 +29,7 @@
#include <linux/poll.h>
#include <linux/devfs_fs_kernel.h>
#include <linux/list.h>
+#include <linux/usercopy.h>

#define DVB_MAJOR 250

@@ -61,7 +62,7 @@
int users;
int writers;

- /* don't really need those !? -- FIXME: use video_usercopy */
+ /* don't really need those !? -- FIXME: use generic_usercopy */
int (*kernel_ioctl)(struct inode *inode, struct file *file,
unsigned int cmd, void *arg);

@@ -84,9 +85,5 @@
extern int dvb_generic_release (struct inode *inode, struct file *file);
extern int dvb_generic_ioctl (struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg);
-int dvb_usercopy(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg,
- int (*func)(struct inode *inode, struct file *file,
- unsigned int cmd, void *arg));
#endif /* #ifndef _DVBDEV_H_ */
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