[PATCH] s390: dasd device identifiers

Generate new sysfs-attribute 'uid' that contains an device specific unique
identifier.  This can be used to identity multiple ALIASES of the same
physical device (PAV).  In addition the sysfs-attributes 'vendor' (containing
the manufacturer of the device) and 'alias' (identify alias or base device) is
added.  This is first part of PAV support in LPAR (also valid on zVM).

Signed-off-by: Horst Hummel <horst.hummel@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 28 insertions, 18 deletions

diff --git a/drivers/s390/block/dasd_eckd.h b/drivers/s390/block/dasd_eckd.h
index ad8524bb7bb3..d5734e976e1c 100644
--- a/drivers/s390/block/dasd_eckd.h
+++ b/drivers/s390/block/dasd_eckd.h
@@ -228,26 +228,36 @@ struct dasd_eckd_confdata {
                 unsigned char HDA_manufacturer[3];
                 unsigned char HDA_location[2];
                 unsigned char HDA_seqno[12];
-                __u16 ID;
+                __u8 ID;
+                __u8 unit_addr;
         } __attribute__ ((packed)) ned1;
-        struct {
+        union {
                 struct {
-                        unsigned char identifier:2;
-                        unsigned char token_id:1;
-                        unsigned char sno_valid:1;
-                        unsigned char subst_sno:1;
-                        unsigned char recNED:1;
-                        unsigned char emuNED:1;
-                        unsigned char reserved:1;
-                } __attribute__ ((packed)) flags;
-                __u8 descriptor;
-                __u8 reserved[2];
-                unsigned char dev_type[6];
-                unsigned char dev_model[3];
-                unsigned char DASD_manufacturer[3];
-                unsigned char DASD_location[2];
-                unsigned char DASD_seqno[12];
-                __u16 ID;
+                        struct {
+                                unsigned char identifier:2;
+                                unsigned char token_id:1;
+                                unsigned char sno_valid:1;
+                                unsigned char subst_sno:1;
+                                unsigned char recNED:1;
+                                unsigned char emuNED:1;
+                                unsigned char reserved:1;
+                        } __attribute__ ((packed)) flags;
+                        __u8 descriptor;
+                        __u8 reserved[2];
+                        unsigned char dev_type[6];
+                        unsigned char dev_model[3];
+                        unsigned char DASD_manufacturer[3];
+                        unsigned char DASD_location[2];
+                        unsigned char DASD_seqno[12];
+                        __u16 ID;
+                } __attribute__ ((packed)) ned;
+                struct {
+                        unsigned char flags;            /* byte  0    */
+                        unsigned char res2[7];          /* byte  1- 7 */
+                        unsigned char sua_flags;        /* byte  8    */
+                        __u8 base_unit_addr;            /* byte  9    */
+                        unsigned char res3[22];         /* byte 10-31 */
+                } __attribute__ ((packed)) sneq;
         } __attribute__ ((packed)) ned2;
         struct {
                 struct {