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compat_ioctl: move cdrom handlers to block/compat_ioctl.c

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These are shared by all cd-rom drivers and should have common
handlers. Do slight cosmetic cleanups in the process.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Arnd Bergmann
2007-10-09 13:23:56 +02:00
committed by Jens Axboe
parent 18cf7f8723
commit b3087cc4f3
2 changed files with 83 additions and 105 deletions
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block/compat_ioctl.c
+83
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@@ -92,6 +92,84 @@ static int compat_hdio_ioctl(struct inode *inode, struct file *file,
return error;
}
struct compat_cdrom_read_audio {
union cdrom_addr addr;
u8 addr_format;
compat_int_t nframes;
compat_caddr_t buf;
};
struct compat_cdrom_generic_command {
unsigned char cmd[CDROM_PACKET_SIZE];
compat_caddr_t buffer;
compat_uint_t buflen;
compat_int_t stat;
compat_caddr_t sense;
unsigned char data_direction;
compat_int_t quiet;
compat_int_t timeout;
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)
{
struct cdrom_read_audio __user *cdread_audio;
struct compat_cdrom_read_audio __user *cdread_audio32;
__u32 data;
void __user *datap;
cdread_audio = compat_alloc_user_space(sizeof(*cdread_audio));
cdread_audio32 = compat_ptr(arg);
if (copy_in_user(&cdread_audio->addr,
&cdread_audio32->addr,
(sizeof(*cdread_audio32) -
sizeof(compat_caddr_t))))
return -EFAULT;
if (get_user(data, &cdread_audio32->buf))
return -EFAULT;
datap = compat_ptr(data);
if (put_user(datap, &cdread_audio->buf))
return -EFAULT;
return blkdev_driver_ioctl(inode, file, disk, 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)
{
struct cdrom_generic_command __user *cgc;
struct compat_cdrom_generic_command __user *cgc32;
u32 data;
unsigned char dir;
int itmp;
cgc = compat_alloc_user_space(sizeof(*cgc));
cgc32 = compat_ptr(arg);
if (copy_in_user(&cgc->cmd, &cgc32->cmd, sizeof(cgc->cmd)) ||
get_user(data, &cgc32->buffer) ||
put_user(compat_ptr(data), &cgc->buffer) ||
copy_in_user(&cgc->buflen, &cgc32->buflen,
(sizeof(unsigned int) + sizeof(int))) ||
get_user(data, &cgc32->sense) ||
put_user(compat_ptr(data), &cgc->sense) ||
get_user(dir, &cgc32->data_direction) ||
put_user(dir, &cgc->data_direction) ||
get_user(itmp, &cgc32->quiet) ||
put_user(itmp, &cgc->quiet) ||
get_user(itmp, &cgc32->timeout) ||
put_user(itmp, &cgc->timeout) ||
get_user(data, &cgc32->reserved[0]) ||
put_user(compat_ptr(data), &cgc->reserved[0]))
return -EFAULT;
return blkdev_driver_ioctl(inode, file, disk, cmd, (unsigned long)cgc);
}
struct compat_blkpg_ioctl_arg {
compat_int_t op;
compat_int_t flags;
@@ -190,6 +268,11 @@ static int compat_blkdev_driver_ioctl(struct inode *inode, struct file *file,
case HDIO_GET_ADDRESS:
case HDIO_GET_BUSSTATE:
return compat_hdio_ioctl(inode, file, disk, cmd, arg);
case CDROMREADAUDIO:
return compat_cdrom_read_audio(inode, file, disk, cmd, arg);
case CDROM_SEND_PACKET:
return compat_cdrom_generic_command(inode, file, disk, cmd, arg);
/*
* No handler required for the ones below, we just need to
* convert arg to a 64 bit pointer.