[SCSI] osst: changes required to move forward to block request

On 02/07/2006 04:12:55 AM, Christoph Hellwig wrote:
> On Mon, Feb 06, 2006 at 08:02:21PM -0500, Willem Riede wrote:
>
> > But I will certainly help retire scsi_request. And anything else that is
> > needed to keep up with proper kernel style. Let me know what those are, if
> > you  would? I'll start looking at how st has changed, and will be back with
> > any  questions I may have.
>
> right now the above is the most urgent bit.  What would be nice but not
> required is a conversion to the sense handling helpers, similar to what
> st got (aka using the *normalize_sense functions and then dealing with the
> parsed sense buffer instead of the raw sense data)

Ok, so here is my first take at satisfying this request.
Be warned, that beyond compiling, and checking that the new module
doesn't immediately blow up, there hasn't yet been a lot of testing.

But this should allow you to comment on the changes, and move forward
with dropping scsi_request from the kernel code.
Signed-off-by: NWillem Riede <osst@riede.org>
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/osst.h

@@ -518,7 +518,8 @@ struct osst_buffer {
   int writing;
   int midlevel_result;
   int syscall_result;
-  struct scsi_request *last_SRpnt;
+  struct osst_request *last_SRpnt;
+  struct st_cmdstatus cmdstat;
   unsigned char *b_data;
   os_aux_t *aux;               /* onstream AUX structure at end of each block     */
   unsigned short use_sg;       /* zero or number of s/g segments for this adapter */
@@ -626,6 +627,15 @@ struct osst_tape {
   struct gendisk *drive;
 } ;
 
+/* scsi tape command */
+struct osst_request {
+	unsigned char cmd[MAX_COMMAND_SIZE];
+	unsigned char sense[SCSI_SENSE_BUFFERSIZE];
+	int result;
+	struct osst_tape *stp;
+	struct completion *waiting;
+};
+
 /* Values of write_type */
 #define OS_WRITE_DATA      0
 #define OS_WRITE_EOD       1