[SCSI] libiscsi, iscsi_tcp, ib_iser : add sw iscsi host get/set params helpers

iscsid and udev need to key off the hw address being
used so add some helpers for iser and iscsi tcp.

Also convert them

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Cc: Roland Dreier <rdreier@cisco.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

2 files changed, 44 insertions, 0 deletions

diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c
index c9a3abf9e7b6..9a42fc074b76 100644
--- a/drivers/scsi/iscsi_tcp.c
+++ b/drivers/scsi/iscsi_tcp.c
@@ -2181,6 +2181,7 @@ static struct iscsi_transport iscsi_tcp_transport = {
                                   ISCSI_PERSISTENT_ADDRESS |
                                   ISCSI_TARGET_NAME |
                                   ISCSI_TPGT,
+        .host_param_mask        = ISCSI_HOST_HWADDRESS,
         .host_template          = &iscsi_sht,
         .conndata_size          = sizeof(struct iscsi_conn),
         .max_conn               = 1,
@@ -2197,6 +2198,9 @@ static struct iscsi_transport iscsi_tcp_transport = {
         .get_session_param      = iscsi_session_get_param,
         .start_conn             = iscsi_conn_start,
         .stop_conn              = iscsi_tcp_conn_stop,
+        /* iscsi host params */
+        .get_host_param         = iscsi_host_get_param,
+        .set_host_param         = iscsi_host_set_param,
         /* IO */
         .send_pdu               = iscsi_conn_send_pdu,
         .get_stats              = iscsi_conn_get_stats,
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index 3f5b9b445b29..d430e227e9b7 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -1462,6 +1462,7 @@ void iscsi_session_teardown(struct iscsi_cls_session *cls_session)
         iscsi_pool_free(&session->cmdpool, (void**)session->cmds);
 
         kfree(session->targetname);
+        kfree(session->hwaddress);
 
         iscsi_destroy_session(cls_session);
         scsi_host_put(shost);
@@ -1990,6 +1991,45 @@ int iscsi_conn_get_param(struct iscsi_cls_conn *cls_conn,
 }
 EXPORT_SYMBOL_GPL(iscsi_conn_get_param);
 
+int iscsi_host_get_param(struct Scsi_Host *shost, enum iscsi_host_param param,
+                         char *buf)
+{
+        struct iscsi_session *session = iscsi_hostdata(shost->hostdata);
+        int len;
+
+        switch (param) {
+        case ISCSI_HOST_PARAM_HWADDRESS:
+                if (!session->hwaddress)
+                        len = sprintf(buf, "%s\n", "default");
+                else
+                        len = sprintf(buf, "%s\n", session->hwaddress);
+                break;
+        default:
+                return -ENOSYS;
+        }
+
+        return len;
+}
+EXPORT_SYMBOL_GPL(iscsi_host_get_param);
+
+int iscsi_host_set_param(struct Scsi_Host *shost, enum iscsi_host_param param,
+                         char *buf, int buflen)
+{
+        struct iscsi_session *session = iscsi_hostdata(shost->hostdata);
+
+        switch (param) {
+        case ISCSI_HOST_PARAM_HWADDRESS:
+                if (!session->hwaddress)
+                        session->hwaddress = kstrdup(buf, GFP_KERNEL);
+                break;
+        default:
+                return -ENOSYS;
+        }
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(iscsi_host_set_param);
+
 MODULE_AUTHOR("Mike Christie");
 MODULE_DESCRIPTION("iSCSI library functions");
 MODULE_LICENSE("GPL");