[S390] dasd: do path verification for paths added at runtime

When a new path is added at runtime, the CIO layer will call the drivers
path_event callback. The DASD device driver uses this callback to trigger
a path verification for the new path. The driver will use only those
paths for I/O, which have been successfully verified.

Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 2 insertions, 7 deletions

diff --git a/drivers/s390/block/dasd_eckd.h b/drivers/s390/block/dasd_eckd.h
index 2150aed541be..5051f374cbcb 100644
--- a/drivers/s390/block/dasd_eckd.h
+++ b/drivers/s390/block/dasd_eckd.h
@@ -45,6 +45,7 @@
 #define DASD_ECKD_CCW_PFX                0xE7
 #define DASD_ECKD_CCW_PFX_READ           0xEA
 #define DASD_ECKD_CCW_RSCK               0xF9
+#define DASD_ECKD_CCW_RCD                0xFA
 
 /*
  * Perform Subsystem Function / Sub-Orders
@@ -59,6 +60,7 @@
 
 
 #define FCX_MAX_DATA_FACTOR 65536
+#define DASD_ECKD_RCD_DATA_SIZE 256
 
 
 /*****************************************************************************
@@ -335,12 +337,6 @@ struct dasd_gneq {
         __u8 reserved2[22];
 } __attribute__ ((packed));
 
-struct dasd_eckd_path {
-        __u8 opm;
-        __u8 ppm;
-        __u8 npm;
-};
-
 struct dasd_rssd_features {
         char feature[256];
 } __attribute__((packed));
@@ -446,7 +442,6 @@ struct dasd_eckd_private {
         struct vd_sneq *vdsneq;
         struct dasd_gneq *gneq;
 
-        struct dasd_eckd_path path_data;
         struct eckd_count count_area[5];
         int init_cqr_status;
         int uses_cdl;