[Qemu-devel] [PATCH 1/3] scsi-disk: Add 'port_group' property

[Hannes Reinecke <hare@suse.de>]

Each SCSI target port can have a 'target port group' identifier.
This identifier is used for management software to group individual
I_T_L nexus together eg when assembling a multipath topology.

Signed-off-by: Hannes Reinecke <hare@suse.de>
---
 hw/scsi/scsi-disk.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c
index 4797d83..f544f43 100644
--- a/hw/scsi/scsi-disk.c
+++ b/hw/scsi/scsi-disk.c
@@ -79,6 +79,7 @@ struct SCSIDiskState
     uint64_t wwn;
     uint64_t port_wwn;
     uint16_t port_index;
+    uint16_t port_group;
     uint64_t max_unmap_size;
     uint64_t max_io_size;
     QEMUBH *bh;
@@ -658,6 +659,14 @@ static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf)
                 stw_be_p(&outbuf[buflen + 2], s->port_index);
                 buflen += 4;
             }
+            if (s->port_group) {
+                outbuf[buflen++] = 0x61; // SAS / Binary
+                outbuf[buflen++] = 0x95; // PIV / Target port / target port group
+                outbuf[buflen++] = 0;    // reserved
+                outbuf[buflen++] = 4;
+                stw_be_p(&outbuf[buflen + 2], s->port_group);
+                buflen += 4;
+            }
             break;
         }
         case 0xb0: /* block limits */
@@ -2670,6 +2679,7 @@ static Property scsi_hd_properties[] = {
     DEFINE_PROP_UINT64("wwn", SCSIDiskState, wwn, 0),
     DEFINE_PROP_UINT64("port_wwn", SCSIDiskState, port_wwn, 0),
     DEFINE_PROP_UINT16("port_index", SCSIDiskState, port_index, 0),
+    DEFINE_PROP_UINT16("port_group", SCSIDiskState, port_group, 0),
     DEFINE_PROP_UINT64("max_unmap_size", SCSIDiskState, max_unmap_size,
                        DEFAULT_MAX_UNMAP_SIZE),
     DEFINE_PROP_UINT64("max_io_size", SCSIDiskState, max_io_size,
@@ -2720,6 +2730,7 @@ static Property scsi_cd_properties[] = {
     DEFINE_PROP_UINT64("wwn", SCSIDiskState, wwn, 0),
     DEFINE_PROP_UINT64("port_wwn", SCSIDiskState, port_wwn, 0),
     DEFINE_PROP_UINT16("port_index", SCSIDiskState, port_index, 0),
+    DEFINE_PROP_UINT16("port_group", SCSIDiskState, port_group, 0),
     DEFINE_PROP_UINT64("max_io_size", SCSIDiskState, max_io_size,
                        DEFAULT_MAX_IO_SIZE),
     DEFINE_PROP_END_OF_LIST(),
@@ -2785,6 +2796,7 @@ static Property scsi_disk_properties[] = {
     DEFINE_PROP_UINT64("wwn", SCSIDiskState, wwn, 0),
     DEFINE_PROP_UINT64("port_wwn", SCSIDiskState, port_wwn, 0),
     DEFINE_PROP_UINT16("port_index", SCSIDiskState, port_index, 0),
+    DEFINE_PROP_UINT16("port_group", SCSIDiskState, port_group, 0),
     DEFINE_PROP_UINT64("max_unmap_size", SCSIDiskState, max_unmap_size,
                        DEFAULT_MAX_UNMAP_SIZE),
     DEFINE_PROP_UINT64("max_io_size", SCSIDiskState, max_io_size,
-- 
1.8.4.5