[SCSI] zfcp: Introduce experimental support for DIF/DIX
Introduce support for DIF/DIX in zfcp: Report the capabilities for the
Scsi_host, map the protection data when issuing I/O requests and
handle the new error codes. Also add the fsf data_direction field to
the hba trace, it is useful information for debugging in that area.
This is an EXPERIMENTAL feature for now.
Signed-off-by: Felix Beck <felix.beck@de.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
diff --git a/drivers/s390/scsi/zfcp_dbf.c b/drivers/s390/scsi/zfcp_dbf.c
index a08d33a..a86117b 100644
--- a/drivers/s390/scsi/zfcp_dbf.c
+++ b/drivers/s390/scsi/zfcp_dbf.c
@@ -155,6 +155,8 @@
if (scsi_cmnd) {
response->u.fcp.cmnd = (unsigned long)scsi_cmnd;
response->u.fcp.serial = scsi_cmnd->serial_number;
+ response->u.fcp.data_dir =
+ qtcb->bottom.io.data_direction;
}
break;
@@ -326,6 +328,7 @@
case FSF_QTCB_FCP_CMND:
if (r->fsf_req_status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
break;
+ zfcp_dbf_out(p, "data_direction", "0x%04x", r->u.fcp.data_dir);
zfcp_dbf_out(p, "scsi_cmnd", "0x%0Lx", r->u.fcp.cmnd);
zfcp_dbf_out(p, "scsi_serial", "0x%016Lx", r->u.fcp.serial);
*p += sprintf(*p, "\n");