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linux-sg2042
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[PATCH] trim file propagation in block/compat_ioctl.c 

... and remove the handling of cases when it falls back to native
without changing arguments.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2008-02-22 22:02:50 -05:00
parent 90b8f2824c
commit 33c2dca495
1 changed files with 26 additions and 47 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

73
block/compat_ioctl.c
View File

@ -71,8 +71,8 @@ static int compat_hdio_getgeo(struct gendisk *disk, struct block_device *bdev,
return ret;
}
static int compat_hdio_ioctl(struct inode *inode, struct file *file,
struct gendisk *disk, unsigned int cmd, unsigned long arg)
static int compat_hdio_ioctl(struct block_device *bdev, fmode_t mode,
unsigned int cmd, unsigned long arg)
{
mm_segment_t old_fs = get_fs();
unsigned long kval;
@ -80,7 +80,7 @@ static int compat_hdio_ioctl(struct inode *inode, struct file *file,
int error;
set_fs(KERNEL_DS);
error = blkdev_driver_ioctl(inode, file, disk,
error = __blkdev_driver_ioctl(bdev, mode,
cmd, (unsigned long)(&kval));
set_fs(old_fs);
@ -111,8 +111,8 @@ struct compat_cdrom_generic_command {
compat_caddr_t reserved[1];
};
static int compat_cdrom_read_audio(struct inode *inode, struct file *file,
struct gendisk *disk, unsigned int cmd, unsigned long arg)
static int compat_cdrom_read_audio(struct block_device *bdev, fmode_t mode,
unsigned int cmd, unsigned long arg)
{
struct cdrom_read_audio __user *cdread_audio;
struct compat_cdrom_read_audio __user *cdread_audio32;
@ -134,12 +134,12 @@ static int compat_cdrom_read_audio(struct inode *inode, struct file *file,
if (put_user(datap, &cdread_audio->buf))
return -EFAULT;
return blkdev_driver_ioctl(inode, file, disk, cmd,
return __blkdev_driver_ioctl(bdev, mode, cmd,
(unsigned long)cdread_audio);
}
static int compat_cdrom_generic_command(struct inode *inode, struct file *file,
struct gendisk *disk, unsigned int cmd, unsigned long arg)
static int compat_cdrom_generic_command(struct block_device *bdev, fmode_t mode,
unsigned int cmd, unsigned long arg)
{
struct cdrom_generic_command __user *cgc;
struct compat_cdrom_generic_command __user *cgc32;
@ -167,7 +167,7 @@ static int compat_cdrom_generic_command(struct inode *inode, struct file *file,
put_user(compat_ptr(data), &cgc->reserved[0]))
return -EFAULT;
return blkdev_driver_ioctl(inode, file, disk, cmd, (unsigned long)cgc);
return __blkdev_driver_ioctl(bdev, mode, cmd, (unsigned long)cgc);
}
struct compat_blkpg_ioctl_arg {
@ -308,8 +308,8 @@ static struct {
#define NR_FD_IOCTL_TRANS ARRAY_SIZE(fd_ioctl_trans_table)
static int compat_fd_ioctl(struct inode *inode, struct file *file,
struct gendisk *disk, unsigned int cmd, unsigned long arg)
static int compat_fd_ioctl(struct block_device *bdev, fmode_t mode,
unsigned int cmd, unsigned long arg)
{
mm_segment_t old_fs = get_fs();
void *karg = NULL;
@ -413,7 +413,7 @@ static int compat_fd_ioctl(struct inode *inode, struct file *file,
return -EINVAL;
}
set_fs(KERNEL_DS);
err = blkdev_driver_ioctl(inode, file, disk, kcmd, (unsigned long)karg);
err = __blkdev_driver_ioctl(bdev, mode, kcmd, (unsigned long)karg);
set_fs(old_fs);
if (err)
goto out;
@ -579,8 +579,8 @@ static int compat_blk_trace_setup(struct block_device *bdev, char __user *arg)
return 0;
}
static int compat_blkdev_driver_ioctl(struct inode *inode, struct file *file,
struct gendisk *disk, unsigned cmd, unsigned long arg)
static int compat_blkdev_driver_ioctl(struct block_device *bdev, fmode_t mode,
unsigned cmd, unsigned long arg)
{
int ret;
@ -596,7 +596,7 @@ static int compat_blkdev_driver_ioctl(struct inode *inode, struct file *file,
case HDIO_GET_ACOUSTIC:
case HDIO_GET_ADDRESS:
case HDIO_GET_BUSSTATE:
return compat_hdio_ioctl(inode, file, disk, cmd, arg);
return compat_hdio_ioctl(bdev, mode, cmd, arg);
case FDSETPRM32:
case FDDEFPRM32:
case FDGETPRM32:
@ -606,11 +606,11 @@ static int compat_blkdev_driver_ioctl(struct inode *inode, struct file *file,
case FDPOLLDRVSTAT32:
case FDGETFDCSTAT32:
case FDWERRORGET32:
return compat_fd_ioctl(inode, file, disk, cmd, arg);
return compat_fd_ioctl(bdev, mode, cmd, arg);
case CDROMREADAUDIO:
return compat_cdrom_read_audio(inode, file, disk, cmd, arg);
return compat_cdrom_read_audio(bdev, mode, cmd, arg);
case CDROM_SEND_PACKET:
return compat_cdrom_generic_command(inode, file, disk, cmd, arg);
return compat_cdrom_generic_command(bdev, mode, cmd, arg);
/*
* No handler required for the ones below, we just need to
@ -679,40 +679,16 @@ static int compat_blkdev_driver_ioctl(struct inode *inode, struct file *file,
case DVD_WRITE_STRUCT:
case DVD_AUTH:
arg = (unsigned long)compat_ptr(arg);
/* These intepret arg as an unsigned long, not as a pointer,
* so we must not do compat_ptr() conversion. */
case HDIO_SET_MULTCOUNT:
case HDIO_SET_UNMASKINTR:
case HDIO_SET_KEEPSETTINGS:
case HDIO_SET_32BIT:
case HDIO_SET_NOWERR:
case HDIO_SET_DMA:
case HDIO_SET_PIO_MODE:
case HDIO_SET_NICE:
case HDIO_SET_WCACHE:
case HDIO_SET_ACOUSTIC:
case HDIO_SET_BUSSTATE:
case HDIO_SET_ADDRESS:
case CDROMEJECT_SW:
case CDROM_SET_OPTIONS:
case CDROM_CLEAR_OPTIONS:
case CDROM_SELECT_SPEED:
case CDROM_SELECT_DISC:
case CDROM_MEDIA_CHANGED:
case CDROM_DRIVE_STATUS:
case CDROM_LOCKDOOR:
case CDROM_DEBUG:
break;
default:
/* unknown ioctl number */
return -ENOIOCTLCMD;
}
return __blkdev_driver_ioctl(inode->i_bdev, file->f_mode, cmd, arg);
return __blkdev_driver_ioctl(bdev, mode, cmd, arg);
}
static int compat_blkdev_locked_ioctl(struct inode *inode, struct file *file,
struct block_device *bdev,
static int compat_blkdev_locked_ioctl(struct block_device *bdev,
unsigned cmd, unsigned long arg)
{
struct backing_dev_info *bdi;
@ -772,6 +748,9 @@ long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
struct inode *inode = file->f_mapping->host;
struct block_device *bdev = inode->i_bdev;
struct gendisk *disk = bdev->bd_disk;
fmode_t mode = file->f_mode;
if (file->f_flags & O_NDELAY)
mode |= FMODE_NDELAY_NOW;
switch (cmd) {
case HDIO_GETGEO:
@ -794,13 +773,13 @@ long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
}
lock_kernel();
ret = compat_blkdev_locked_ioctl(inode, file, bdev, cmd, arg);
ret = compat_blkdev_locked_ioctl(bdev, cmd, arg);
unlock_kernel();
if (ret == -ENOIOCTLCMD && disk->fops->compat_ioctl)
ret = disk->fops->compat_ioctl(bdev, file->f_mode, cmd, arg);
ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg);
if (ret != -ENOIOCTLCMD)
return ret;
return compat_blkdev_driver_ioctl(inode, file, disk, cmd, arg);
return compat_blkdev_driver_ioctl(bdev, mode, cmd, arg);
}