Added functionality needed for new st(8) [ SCSI TAPE control ] program

and the new scsi/st.c driver.  Most of this is for variable block-size
tape drives.

diff --git a/sys/sys/mtio.h b/sys/sys/mtio.h
index e42c92b..4a07432 100644 (file)
--- a/sys/sys/mtio.h
+++ b/sys/sys/mtio.h
@@ -54,6 +54,26 @@ struct mtop {
 #define MTNOP          7       /* no operation, sets status only */
 #define MTCACHE                8       /* enable controller cache */
 #define MTNOCACHE      9       /* disable controller cache */
 #define MTNOP          7       /* no operation, sets status only */
 #define MTCACHE                8       /* enable controller cache */
 #define MTNOCACHE      9       /* disable controller cache */

+#if defined(__386BSD__)
+#define MTSETBSIZ      10      /* Set block size for device */
+                               /* If device is a variable size dev */
+                               /* a non zero parameter will change */
+                               /* the device to a fixed block size */
+                               /* device with block size set to */
+                               /* that of the parameter passed in. */
+                               /* Resetting the block size to 0 will */
+                               /* restore the device to a variable */
+                               /* block size device. */
+
+                               /* This ioctl is a noop on fixed block */
+                               /* devices. */
+
+#define MTSETHDNSTY    11      /* Set default high density values for device */
+#define MTSETMDNSTY    12      /* Set default medium density values for device */
+#define MTSETLDNSTY    13      /* Set default low density values for device */
+                               /* These values are as defined in SCSI II spec */
+                               /* and range from 0 to 0x17 */
+#endif

 
 /* structure for MTIOCGET - mag tape get status command */
 
 
 /* structure for MTIOCGET - mag tape get status command */
 


@@ -63,11 +83,18 @@ struct mtget {
        short   mt_dsreg;       /* ``drive status'' register */
        short   mt_erreg;       /* ``error'' register */
 /* end device-dependent registers */
        short   mt_dsreg;       /* ``drive status'' register */
        short   mt_erreg;       /* ``error'' register */
 /* end device-dependent registers */

-       short   mt_resid;       /* residual count */
+       daddr_t mt_resid;       /* residual count */
+#if defined (__386BSD__)
+       daddr_t mt_bsiz;        /* block size, 0 is variable */
+       short   mt_dns_high;    /* density setting for high density */
+       short   mt_dns_medium;  /* density setting for medium density */
+       short   mt_dns_low;     /* density setting for low density */
+#endif

 /* the following two are not yet implemented */
        daddr_t mt_fileno;      /* file number of current position */
        daddr_t mt_blkno;       /* block number of current position */
 /* end not yet implemented */
 /* the following two are not yet implemented */
        daddr_t mt_fileno;      /* file number of current position */
        daddr_t mt_blkno;       /* block number of current position */
 /* end not yet implemented */

+       u_short mt_flags;       /* Solbourne compatiable way of getting r/w status */

 };
 
 /*
 };
 
 /*


@@ -92,6 +119,11 @@ struct mtget {
 #define MT_ISPYTHON    0x0f            /* Archive Python (DAT) */
 #define MT_ISHPDAT     0x10            /* HP 35450A DAT drive */
 
 #define MT_ISPYTHON    0x0f            /* Archive Python (DAT) */
 #define MT_ISHPDAT     0x10            /* HP 35450A DAT drive */
 

+/*
+ * Constants for mt_flags structure.
+ */
+#define MTF_WRITE_PROT 0x8000          /* write protect status of tape */
+

 /* mag tape io control commands */
 #define        MTIOCTOP        _IOW('m', 1, struct mtop)       /* do a mag tape op */
 #define        MTIOCGET        _IOR('m', 2, struct mtget)      /* get tape status */
 /* mag tape io control commands */
 #define        MTIOCTOP        _IOW('m', 1, struct mtop)       /* do a mag tape op */
 #define        MTIOCGET        _IOR('m', 2, struct mtget)      /* get tape status */