[SCSI] libosd: OSDv2 auto detection

Auto detect an OSDv2 or OSDv1 target at run time. Note how none
of the OSD API calls change. The tests do not know what device
version it is.

This test now passes against both the IBM-OSD-SIM OSD1 target
as well as OSC's OSD2 target.

Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Reviewed-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/scsi/osd/osd_uld.c b/drivers/scsi/osd/osd_uld.c
index cd4ca7cd9f75..f8b1a749958b 100644
--- a/drivers/scsi/osd/osd_uld.c
+++ b/drivers/scsi/osd/osd_uld.c
@@ -243,6 +243,7 @@ EXPORT_SYMBOL(osduld_put_device);
 static int __detect_osd(struct osd_uld_device *oud)
 {
         struct scsi_device *scsi_device = oud->od.scsi_device;
+        char caps[OSD_CAP_LEN];
         int error;
 
         /* sending a test_unit_ready as first command seems to be needed
@@ -254,6 +255,10 @@ static int __detect_osd(struct osd_uld_device *oud)
         if (error)
                 OSD_ERR("warning: scsi_test_unit_ready failed\n");
 
+        osd_sec_init_nosec_doall_caps(caps, &osd_root_object, false, true);
+        if (osd_auto_detect_ver(&oud->od, caps))
+                return -ENODEV;
+
         return 0;
 }