Hannes Reinecke wrote: > Hi all, > > this patch allows to set the REQ_FAILFAST flag to be set from SG_IO > commands. With it one can send generic SCSI commands which behave > exactly like normal requests send via the block layer. > > Comments etc welcome. Hannes, Looks good. There is no proposed change to sg.c . Could SG_FLAG_FAILFAST be made to work via sg device nodes? Doug Gilbert > ------------------------------------------------------------------------ > > Allow FAILFAST flag to be set for SG_IO commands > > This patch allows the FAILFAST flag to be set for SG_IO commands. > > Signed-off-by: Hannes Reinecke <hare@xxxxxxx> > > diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c > index b33eda2..658b1b5 100644 > --- a/block/scsi_ioctl.c > +++ b/block/scsi_ioctl.c > @@ -295,6 +295,8 @@ static int sg_io(struct file *file, requ > rq->sense_len = 0; > > rq->flags |= REQ_BLOCK_PC; > + if (hdr->flags & SG_FLAGS_FAILFAST) > + rq->flags |= REQ_FAILFAST; > bio = rq->bio; > > /* > diff --git a/include/scsi/sg.h b/include/scsi/sg.h > index 0a487fe..9cc466a 100644 > --- a/include/scsi/sg.h > +++ b/include/scsi/sg.h > @@ -142,6 +142,7 @@ typedef struct sg_io_hdr > #define SG_FLAG_UNUSED_LUN_INHIBIT 2 /* default is overwrite lun in SCSI */ > /* command block (when <= SCSI_2) */ > #define SG_FLAG_MMAP_IO 4 /* request memory mapped IO */ > +#define SG_FLAG_FAILFAST 8 /* request should set FAILFAST flag */ > #define SG_FLAG_NO_DXFER 0x10000 /* no transfer of kernel buffers to/from */ > /* user space (debug indirect IO) */ > - : send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
