root/include/scsi/scsi_ioctl.h

#ifndef _SCSI_IOCTL_H
#define _SCSI_IOCTL_H 

#define SCSI_IOCTL_SEND_COMMAND 1
#define SCSI_IOCTL_TEST_UNIT_READY 2
#define SCSI_IOCTL_BENCHMARK_COMMAND 3
#define SCSI_IOCTL_SYNC 4                       /* Request synchronous parameters */
#define SCSI_IOCTL_START_UNIT 5
#define SCSI_IOCTL_STOP_UNIT 6
/* The door lock/unlock constants are compatible with Sun constants for
   the cdrom */
#define SCSI_IOCTL_DOORLOCK 0x5380              /* lock the eject mechanism */
#define SCSI_IOCTL_DOORUNLOCK 0x5381            /* unlock the mechanism   */

#define SCSI_REMOVAL_PREVENT    1
#define SCSI_REMOVAL_ALLOW      0

#ifdef __KERNEL__

struct scsi_device;

/*
 * Structures used for scsi_ioctl et al.
 */

typedef struct scsi_ioctl_command {
        unsigned int inlen;
        unsigned int outlen;
        unsigned char data[0];
} Scsi_Ioctl_Command;

typedef struct scsi_idlun {
        __u32 dev_id;
        __u32 host_unique_id;
} Scsi_Idlun;

/* Fibre Channel WWN, port_id struct */
typedef struct scsi_fctargaddress {
        __u32 host_port_id;
        unsigned char host_wwn[8]; // include NULL term.
} Scsi_FCTargAddress;

extern int scsi_ioctl(struct scsi_device *, int, void __user *);
extern int scsi_nonblockable_ioctl(struct scsi_device *sdev, int cmd,
                                   void __user *arg, int ndelay);

#endif /* __KERNEL__ */
#endif /* _SCSI_IOCTL_H */