scsi: scsi_ioctl: Remove scsi_verify_blk_ioctl()

Manually verify that the device is not a partition and the caller has admin
privіleges at the beginning of the sr ioctl method and open code the
trivial check for sd as well.

Link: https://lore.kernel.org/r/20210724072033.1284840-11-hch@lst.deSigned-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

block/scsi_ioctl.c

@@ -842,18 +842,6 @@ int scsi_cmd_ioctl(struct request_queue *q, struct gendisk *bd_disk, fmode_t mod
 }
 EXPORT_SYMBOL(scsi_cmd_ioctl);
 
-int scsi_verify_blk_ioctl(struct block_device *bd, unsigned int cmd)
-{
-	if (bd && !bdev_is_partition(bd))
-		return 0;
-
-	if (capable(CAP_SYS_RAWIO))
-		return 0;
-
-	return -ENOIOCTLCMD;
-}
-EXPORT_SYMBOL(scsi_verify_blk_ioctl);
-
 /**
  * scsi_req_init - initialize certain fields of a scsi_request structure
  * @req: Pointer to a scsi_request structure.

drivers/scsi/sd.c

@@ -1555,9 +1555,8 @@ static int sd_ioctl(struct block_device *bdev, fmode_t mode,
 	SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, "
 				    "cmd=0x%x\n", disk->disk_name, cmd));
 
-	error = scsi_verify_blk_ioctl(bdev, cmd);
-	if (error < 0)
-		return error;
+	if (bdev_is_partition(bdev) && !capable(CAP_SYS_RAWIO))
+		return -ENOIOCTLCMD;
 
 	/*
 	 * If we are in the middle of error recovery, don't let anyone
@@ -1583,9 +1582,6 @@ static int sd_ioctl(struct block_device *bdev, fmode_t mode,
 	case SCSI_IOCTL_GET_BUS_NUMBER:
 		break;
 	default:
-		error = scsi_verify_blk_ioctl(bdev, cmd);
-		if (error < 0)
-			return error;
 		error = scsi_cmd_ioctl(disk->queue, disk, mode, cmd, p);
 		if (error != -ENOTTY)
 			return error;

drivers/scsi/sr.c

@@ -562,6 +562,9 @@ static int sr_block_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
 	void __user *argp = (void __user *)arg;
 	int ret;
 
+	if (bdev_is_partition(bdev) && !capable(CAP_SYS_RAWIO))
+		return -ENOIOCTLCMD;
+
 	mutex_lock(&cd->lock);
 
 	ret = scsi_ioctl_block_when_processing_errors(sdev, cmd,
@@ -580,9 +583,6 @@ static int sr_block_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
 	case SCSI_IOCTL_GET_BUS_NUMBER:
 		break;
 	default:
-		ret = scsi_verify_blk_ioctl(bdev, cmd);
-		if (ret < 0)
-			goto put;
 		ret = scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
 		if (ret != -ENOTTY)
 			goto put;

include/linux/blkdev.h

@@ -888,7 +888,6 @@ extern blk_status_t blk_insert_cloned_request(struct request_queue *q,
 				     struct request *rq);
 int blk_rq_append_bio(struct request *rq, struct bio *bio);
 extern void blk_queue_split(struct bio **);
-extern int scsi_verify_blk_ioctl(struct block_device *, unsigned int);
 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,