[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>

diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c
index 59287601bd41c189d7f3bcf8c51241eca13edcb2..3fd2da451fe1728546529e95ae271fda9de3e95e 100644 (file)
--- a/drivers/scsi/scsi_transport_iscsi.c
+++ b/drivers/scsi/scsi_transport_iscsi.c
@@ -967,6 +967,30 @@ iscsi_tgt_dscvr(struct iscsi_transport *transport,
        return err;
 }
 
+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)
 {
@@ -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;
        }
 

diff --git a/include/scsi/iscsi_if.h b/include/scsi/iscsi_if.h
index fba211743729c1077d4ff13e5618b59445fba811..3d0372e30ca1d2c6ce6ee2956f22864985e354e2 100644 (file)
--- a/include/scsi/iscsi_if.h
+++ b/include/scsi/iscsi_if.h
@@ -48,6 +48,7 @@ enum iscsi_uevent_e {
        ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT    = UEVENT_BASE + 14,
 
        ISCSI_UEVENT_TGT_DSCVR          = UEVENT_BASE + 15,
+       ISCSI_UEVENT_SET_HOST_PARAM     = UEVENT_BASE + 16,
 
        /* up events */
        ISCSI_KEVENT_RECV_PDU           = KEVENT_BASE + 1,
@@ -136,6 +137,11 @@ struct iscsi_uevent {
                         */
                        uint32_t        enable;
                } tgt_dscvr;
+               struct msg_set_host_param {
+                       uint32_t        host_no;
+                       uint32_t        param; /* enum iscsi_host_param */
+                       uint32_t        len;
+               } set_host_param;
        } u;
        union {
                /* messages k -> u */

diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h
index 902e69f0272ce196e407946178e8bd5d56bf4ca5..1ac450b0690912ff258cc06db0c9e3279a0170e8 100644 (file)
--- a/include/scsi/scsi_transport_iscsi.h
+++ b/include/scsi/scsi_transport_iscsi.h
@@ -108,6 +108,9 @@ struct iscsi_transport {
                                  enum iscsi_param param, char *buf);
        int (*get_host_param) (struct Scsi_Host *shost,
                                enum iscsi_host_param param, char *buf);
+       int (*set_host_param) (struct Scsi_Host *shost,
+                              enum iscsi_host_param param, char *buf,
+                              int buflen);
        int (*send_pdu) (struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
                         char *data, uint32_t data_size);
        void (*get_stats) (struct iscsi_cls_conn *conn,