Commit 4c3cfcce authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Jens Axboe
Browse files

cdrom: factor out a cdrom_read_tocentry helper 



Factor out a version of the CDROMREADTOCENTRY ioctl handler that can
be called directly from kernel space.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarDamien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: default avatarHannes Reinecke <hare@suse.de>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 068f8d9b

drivers/cdrom/cdrom.c

+22 −17
Original line number Diff line number Diff line
@@ -2666,32 +2666,37 @@ static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi, 
	return 0;

}



static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,

		void __user *argp)

int cdrom_read_tocentry(struct cdrom_device_info *cdi,

		struct cdrom_tocentry *entry)

{

	struct cdrom_tocentry entry;

	u8 requested_format;

	u8 requested_format = entry->cdte_format;

	int ret;



	/* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */



	if (copy_from_user(&entry, argp, sizeof(entry)))

		return -EFAULT;



	requested_format = entry.cdte_format;

	if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)

		return -EINVAL;



	/* make interface to low-level uniform */

	entry.cdte_format = CDROM_MSF;

	ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry);

	if (ret)

	entry->cdte_format = CDROM_MSF;

	ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, entry);

	if (!ret)

		sanitize_format(&entry->cdte_addr, &entry->cdte_format,

				requested_format);

	return ret;

	sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format);

}

EXPORT_SYMBOL_GPL(cdrom_read_tocentry);



	if (copy_to_user(argp, &entry, sizeof(entry)))

static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,

		void __user *argp)

{

	struct cdrom_tocentry entry;

	int ret;



	if (copy_from_user(&entry, argp, sizeof(entry)))

		return -EFAULT;

	/* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */

	return 0;

	ret = cdrom_read_tocentry(cdi, &entry);

	if (!ret && copy_to_user(argp, &entry, sizeof(entry)))

		return -EFAULT;

	return ret;

}



static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,

include/linux/cdrom.h

+3 −0
Original line number Diff line number Diff line
@@ -94,6 +94,9 @@ struct cdrom_device_ops { 
			       struct packet_command *);

};



int cdrom_read_tocentry(struct cdrom_device_info *cdi,

		struct cdrom_tocentry *entry);



/* the general block_device operations structure: */

extern int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev,

			fmode_t mode);

CRA Git | Maintained and supported by SUSTech CRA and CCSE