[PATCH] switch sg_scsi_ioctl() to passing fmode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

block/scsi_ioctl.c

@@ -379,12 +379,11 @@ static int sg_io(struct request_queue *q, struct gendisk *bd_disk,
  *      bytes in one int) where the lowest byte is the SCSI status.
  */
 #define OMAX_SB_LEN 16          /* For backward compatibility */
-int sg_scsi_ioctl(struct file *file, struct request_queue *q,
-		  struct gendisk *disk, struct scsi_ioctl_command __user *sic)
+int sg_scsi_ioctl(struct request_queue *q, struct gendisk *disk, fmode_t mode,
+		struct scsi_ioctl_command __user *sic)
 {
 	struct request *rq;
 	int err;
-	fmode_t write_perm = 0;
 	unsigned int in_len, out_len, bytes, opcode, cmdlen;
 	char *buffer = NULL, sense[SCSI_SENSE_BUFFERSIZE];
 
@@ -426,11 +425,7 @@ int sg_scsi_ioctl(struct file *file, struct request_queue *q,
 	if (in_len && copy_from_user(buffer, sic->data + cmdlen, in_len))
 		goto error;
 
-	/* scsi_ioctl passes NULL */
-	if (file && (file->f_mode & FMODE_WRITE))
-		write_perm = FMODE_WRITE;
-
-	err = blk_verify_command(&q->cmd_filter, rq->cmd, write_perm);
+	err = blk_verify_command(&q->cmd_filter, rq->cmd, mode & FMODE_WRITE);
 	if (err)
 		goto error;
 
@@ -636,7 +631,7 @@ int scsi_cmd_ioctl(struct file *file, struct request_queue *q,
 			if (!arg)
 				break;
 
-			err = sg_scsi_ioctl(file, q, bd_disk, arg);
+			err = sg_scsi_ioctl(q, bd_disk, file ? file->f_mode : 0, arg);
 			break;
 		case CDROMCLOSETRAY:
 			err = blk_send_start_stop(q, bd_disk, 0x03);

drivers/scsi/scsi_ioctl.c

@@ -237,7 +237,7 @@ int scsi_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
 	case SCSI_IOCTL_SEND_COMMAND:
 		if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
 			return -EACCES;
-		return sg_scsi_ioctl(NULL, sdev->request_queue, NULL, arg);
+		return sg_scsi_ioctl(sdev->request_queue, NULL, 0, arg);
 	case SCSI_IOCTL_DOORLOCK:
 		return scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT);
 	case SCSI_IOCTL_DOORUNLOCK:

drivers/scsi/sg.c

@@ -1059,7 +1059,7 @@ sg_ioctl(struct inode *inode, struct file *filp,
 			if (sg_allow_access(filp, &opcode))
 				return -EPERM;
 		}
-		return sg_scsi_ioctl(filp, sdp->device->request_queue, NULL, p);
+		return sg_scsi_ioctl(sdp->device->request_queue, NULL, filp->f_mode, p);
 	case SG_SET_DEBUG:
 		result = get_user(val, ip);
 		if (result)

include/linux/blkdev.h

@@ -719,8 +719,8 @@ extern int blk_remove_plug(struct request_queue *);
 extern void blk_recount_segments(struct request_queue *, struct bio *);
 extern int scsi_cmd_ioctl(struct file *, struct request_queue *,
 			  struct gendisk *, unsigned int, void __user *);
-extern int sg_scsi_ioctl(struct file *, struct request_queue *,
-		struct gendisk *, struct scsi_ioctl_command __user *);
+extern int sg_scsi_ioctl(struct request_queue *, struct gendisk *, fmode_t,
+			 struct scsi_ioctl_command __user *);
 
 /*
  * Temporary export, until SCSI gets fixed up.