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block: add and use scsi_blk_cmd_ioctl 

Introduce a wrapper around scsi_cmd_ioctl that takes a block device.

The function will then be enhanced to detect partition block devices
and, in that case, subject the ioctls to whitelisting.

Cc: linux-scsi@vger.kernel.org
Cc: Jens Axboe <axboe@kernel.dk>
Cc: James Bottomley <JBottomley@parallels.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Paolo Bonzini 2012-01-12 16:01:27 +01:00 committed by Linus Torvalds
parent 81d48f0aee
commit 577ebb374c
8 changed files with 18 additions and 12 deletions
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7
block/scsi_ioctl.c
View File

@ -690,6 +690,13 @@ int scsi_cmd_ioctl(struct request_queue *q, struct gendisk *bd_disk, fmode_t mod
}
EXPORT_SYMBOL(scsi_cmd_ioctl);
int scsi_cmd_blk_ioctl(struct block_device *bd, fmode_t mode,
unsigned int cmd, void __user *arg)
{
return scsi_cmd_ioctl(bd->bd_disk->queue, bd->bd_disk, mode, cmd, arg);
}
EXPORT_SYMBOL(scsi_cmd_blk_ioctl);
static int __init blk_scsi_ioctl_init(void)
{
blk_set_cmd_filter_defaults(&blk_default_cmd_filter);

6
drivers/block/cciss.c
View File

@ -1735,7 +1735,7 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
case CCISS_BIG_PASSTHRU:
return cciss_bigpassthru(h, argp);
/* scsi_cmd_ioctl handles these, below, though some are not */
/* scsi_cmd_blk_ioctl handles these, below, though some are not */
/* very meaningful for cciss. SG_IO is the main one people want. */
case SG_GET_VERSION_NUM:
@ -1746,9 +1746,9 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
case SG_EMULATED_HOST:
case SG_IO:
case SCSI_IOCTL_SEND_COMMAND:
return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
return scsi_cmd_blk_ioctl(bdev, mode, cmd, argp);
/* scsi_cmd_ioctl would normally handle these, below, but */
/* scsi_cmd_blk_ioctl would normally handle these, below, but */
/* they aren't a good fit for cciss, as CD-ROMs are */
/* not supported, and we don't have any bus/target/lun */
/* which we present to the kernel. */

3
drivers/block/ub.c
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@ -1744,12 +1744,11 @@ static int ub_bd_release(struct gendisk *disk, fmode_t mode)
static int ub_bd_ioctl(struct block_device *bdev, fmode_t mode,
unsigned int cmd, unsigned long arg)
{
struct gendisk *disk = bdev->bd_disk;
void __user *usermem = (void __user *) arg;
int ret;
mutex_lock(&ub_mutex);
ret = scsi_cmd_ioctl(disk->queue, disk, mode, cmd, usermem);
ret = scsi_cmd_blk_ioctl(bdev, mode, cmd, usermem);
mutex_unlock(&ub_mutex);
return ret;

4
drivers/block/virtio_blk.c
View File

@ -250,8 +250,8 @@ static int virtblk_ioctl(struct block_device *bdev, fmode_t mode,
if (!virtio_has_feature(vblk->vdev, VIRTIO_BLK_F_SCSI))
return -ENOTTY;
return scsi_cmd_ioctl(disk->queue, disk, mode, cmd,
(void __user *)data);
return scsi_cmd_blk_ioctl(bdev, mode, cmd,
(void __user *)data);
}
/* We provide getgeo only to please some old bootloader/partitioning tools */

3
drivers/cdrom/cdrom.c
View File

@ -2746,12 +2746,11 @@ int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
{
void __user *argp = (void __user *)arg;
int ret;
struct gendisk *disk = bdev->bd_disk;
/*
* Try the generic SCSI command ioctl's first.
*/
ret = scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
ret = scsi_cmd_blk_ioctl(bdev, mode, cmd, argp);
if (ret != -ENOTTY)
return ret;

3
drivers/ide/ide-floppy_ioctl.c
View File

@ -292,8 +292,7 @@ int ide_floppy_ioctl(ide_drive_t *drive, struct block_device *bdev,
* and CDROM_SEND_PACKET (legacy) ioctls
*/
if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
err = scsi_cmd_ioctl(bdev->bd_disk->queue, bdev->bd_disk,
mode, cmd, argp);
err = scsi_cmd_blk_ioctl(bdev, mode, cmd, argp);
if (err == -ENOTTY)
err = generic_ide_ioctl(drive, bdev, cmd, arg);

2
drivers/scsi/sd.c
View File

@ -1097,7 +1097,7 @@ static int sd_ioctl(struct block_device *bdev, fmode_t mode,
error = scsi_ioctl(sdp, cmd, p);
break;
default:
error = scsi_cmd_ioctl(disk->queue, disk, mode, cmd, p);
error = scsi_cmd_blk_ioctl(bdev, mode, cmd, p);
if (error != -ENOTTY)
break;
error = scsi_ioctl(sdp, cmd, p);

2
include/linux/blkdev.h
View File

@ -675,6 +675,8 @@ extern int blk_insert_cloned_request(struct request_queue *q,
struct request *rq);
extern void blk_delay_queue(struct request_queue *, unsigned long);
extern void blk_recount_segments(struct request_queue *, struct bio *);
extern int scsi_cmd_blk_ioctl(struct block_device *, fmode_t,
unsigned int, void __user *);
extern int scsi_cmd_ioctl(struct request_queue *, struct gendisk *, fmode_t,
unsigned int, void __user *);
extern int sg_scsi_ioctl(struct request_queue *, struct gendisk *, fmode_t,