cciss: add cciss driver sysfs entries

Add sysfs entries to the cciss driver needed for the dm/multipath tools.

A file for vendor, model, rev, and unique_id is added for each logical
drive under directory /sys/bus/pci/devices/<dev>/ccissX/cXdY.  Where X =
the controller (or host) number and Y is the logical drive number.

A link from /sys/bus/pci/devices/<dev>/ccissX/cXdY/block:cciss!cXdY to
/sys/block/cciss!cXdY/device is also created.  A bus is created in
/sys/bus/cciss.  A link is created from the pci ccissX entry to
/sys/bus/cciss/devices/ccissX.  Please consider this for inclusion.

Signed-off-by: Mike Miller <mike.miller@hp.com>
Cc: Stephen M. Cameron <scameron@beardog.cca.cpqcorp.net>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 17 insertions, 7 deletions

diff --git a/drivers/block/cciss.h b/drivers/block/cciss.h
index 703e08038fb9..dd1926d8cd97 100644
--- a/drivers/block/cciss.h
+++ b/drivers/block/cciss.h
@@ -12,6 +12,10 @@
 #define IO_OK           0
 #define IO_ERROR        1
 
+#define VENDOR_LEN      8
+#define MODEL_LEN       16
+#define REV_LEN         4
+
 struct ctlr_info;
 typedef struct ctlr_info ctlr_info_t;
 
@@ -34,13 +38,18 @@ typedef struct _drive_info_struct
         int     cylinders;
         int     raid_level; /* set to -1 to indicate that
                              * the drive is not in use/configured
-                            */
-        int     busy_configuring; /*This is set when the drive is being removed
-                                   *to prevent it from being opened or it's queue
-                                   *from being started.
-                                  */
-        __u8 serial_no[16]; /* from inquiry page 0x83, */
-                            /* not necc. null terminated. */
+                             */
+        int     busy_configuring; /* This is set when a drive is being removed
+                                   * to prevent it from being opened or it's
+                                   * queue from being started.
+                                   */
+        struct  device dev;
+        __u8 serial_no[16]; /* from inquiry page 0x83,
+                             * not necc. null terminated.
+                             */
+        char vendor[VENDOR_LEN + 1]; /* SCSI vendor string */
+        char model[MODEL_LEN + 1];   /* SCSI model string */
+        char rev[REV_LEN + 1];       /* SCSI revision string */
 } drive_info_struct;
 
 #ifdef CONFIG_CISS_SCSI_TAPE
@@ -123,6 +132,7 @@ struct ctlr_info
         unsigned char alive;
         struct completion *rescan_wait;
         struct task_struct *cciss_scan_thread;
+        struct device dev;
 };
 
 /*  Defining the diffent access_menthods */