[SCSI] iscsi class: add iscsi host set param event

The iscsi class uses the set_param event to set session
and connection params. This patch adds a set_host_param
so we can set host level values.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 28 insertions, 1 deletions

diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c
index 59287601bd41..3fd2da451fe1 100644
--- a/drivers/scsi/scsi_transport_iscsi.c
+++ b/drivers/scsi/scsi_transport_iscsi.c
@@ -968,6 +968,30 @@ iscsi_tgt_dscvr(struct iscsi_transport *transport,
 }
 
 static int
+iscsi_set_host_param(struct iscsi_transport *transport,
+                     struct iscsi_uevent *ev)
+{
+        char *data = (char*)ev + sizeof(*ev);
+        struct Scsi_Host *shost;
+        int err;
+
+        if (!transport->set_host_param)
+                return -ENOSYS;
+
+        shost = scsi_host_lookup(ev->u.set_host_param.host_no);
+        if (IS_ERR(shost)) {
+                printk(KERN_ERR "set_host_param could not find host no %u\n",
+                       ev->u.set_host_param.host_no);
+                return -ENODEV;
+        }
+
+        err = transport->set_host_param(shost, ev->u.set_host_param.param,
+                                        data, ev->u.set_host_param.len);
+        scsi_host_put(shost);
+        return err;
+}
+
+static int
 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 {
         int err = 0;
@@ -1058,8 +1082,11 @@ iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
         case ISCSI_UEVENT_TGT_DSCVR:
                 err = iscsi_tgt_dscvr(transport, ev);
                 break;
+        case ISCSI_UEVENT_SET_HOST_PARAM:
+                err = iscsi_set_host_param(transport, ev);
+                break;
         default:
-                err = -EINVAL;
+                err = -ENOSYS;
                 break;
         }