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Commit b3087cc4 authored by Arnd Bergmann's avatar Arnd Bergmann Committed by Jens Axboe
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compat_ioctl: move cdrom handlers to block/compat_ioctl.c 



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

Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarJens Axboe <jens.axboe@oracle.com>
parent 18cf7f87

block/compat_ioctl.c

+83 −0
Original line number Diff line number Diff line
@@ -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.

fs/compat_ioctl.c

+0 −105
Original line number Diff line number Diff line
@@ -37,7 +37,6 @@ 
#include <linux/if_ppp.h>

#include <linux/if_pppox.h>

#include <linux/mtio.h>

#include <linux/cdrom.h>

#include <linux/auto_fs.h>

#include <linux/auto_fs4.h>

#include <linux/tty.h>
@@ -1039,108 +1038,6 @@ static int mt_ioctl_trans(unsigned int fd, unsigned int cmd, unsigned long arg) 
	return err ? -EFAULT: 0;

}



struct cdrom_read_audio32 {

	union cdrom_addr	addr;

	u8			addr_format;

	compat_int_t		nframes;

	compat_caddr_t		buf;

};



struct cdrom_generic_command32 {

	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 cdrom_do_read_audio(unsigned int fd, unsigned int cmd, unsigned long arg)

{

	struct cdrom_read_audio __user *cdread_audio;

	struct cdrom_read_audio32 __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 sys_ioctl(fd, cmd, (unsigned long) cdread_audio);

}



static int cdrom_do_generic_command(unsigned int fd, unsigned int cmd, unsigned long arg)

{

	struct cdrom_generic_command __user *cgc;

	struct cdrom_generic_command32 __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 sys_ioctl(fd, cmd, (unsigned long) cgc);

}



static int cdrom_ioctl_trans(unsigned int fd, unsigned int cmd, unsigned long arg)

{

	int err;



	switch(cmd) {

	case CDROMREADAUDIO:

		err = cdrom_do_read_audio(fd, cmd, arg);

		break;



	case CDROM_SEND_PACKET:

		err = cdrom_do_generic_command(fd, cmd, arg);

		break;



	default:

		do {

			static int count;

			if (++count <= 20)

				printk("cdrom_ioctl: Unknown cmd fd(%d) "

				       "cmd(%08x) arg(%08x)\n",

				       (int)fd, (unsigned int)cmd, (unsigned int)arg);

		} while(0);

		err = -EINVAL;

		break;

	};



	return err;

}

#endif /* CONFIG_BLOCK */



#ifdef CONFIG_VT
@@ -3147,8 +3044,6 @@ HANDLE_IOCTL(PPPIOCSACTIVE32, ppp_sock_fprog_ioctl_trans) 
#ifdef CONFIG_BLOCK

HANDLE_IOCTL(MTIOCGET32, mt_ioctl_trans)

HANDLE_IOCTL(MTIOCPOS32, mt_ioctl_trans)

HANDLE_IOCTL(CDROMREADAUDIO, cdrom_ioctl_trans)

HANDLE_IOCTL(CDROM_SEND_PACKET, cdrom_ioctl_trans)

#endif

#define AUTOFS_IOC_SETTIMEOUT32 _IOWR(0x93,0x64,unsigned int)

HANDLE_IOCTL(AUTOFS_IOC_SETTIMEOUT32, ioc_settimeout)