[dm-devel] [PATCH] This patch filled the host WWNN. when using the command of multipathd to list the isscsi paths informartion, the host WWNN of paths informartion is not exist. like this: multipathd show paths format "%N %R" host WWNN host WWPN [undef] iqn.2006-08.com.huawei:oceanstor:21000022a10beb2a::1020002:129.13.100.240 [undef] iqn.2006-08.com.huawei:oceanstor:21000022a10beb2a::20003:129.13.100.241

[s90006763]

this patch solved this problem and filled the host WWNN.
like this:
multipathd show paths format "%N %R"
host WWNN                           host WWPN
iqn.1994-05.com.redhat:86329aefccdb iqn.2006-08.com.huawei:oceanstor:21000022a10beb2a::1020002:129.13.100.240
iqn.1994-05.com.redhat:86329aefccdb iqn.2006-08.com.huawei:oceanstor:21000022a10beb2a::20003:129.13.100.241
---
 libmultipath/print.c | 52 +++++++++++++++++++++++++++++++++++++++-------------
 1 file changed, 39 insertions(+), 13 deletions(-)

diff --git a/libmultipath/print.c b/libmultipath/print.c
index 9da6a77c..e2b90301 100644
--- a/libmultipath/print.c
+++ b/libmultipath/print.c
@@ -539,20 +539,39 @@ snprint_host_attr (char * buff, size_t len, const struct path * pp, char *attr)
 	char host_id[32];
 	const char *value = NULL;
 	int ret;
-
-	if (pp->sg_id.proto_id != SCSI_PROTOCOL_FCP)
+    
+	if ((pp->sg_id.proto_id != SCSI_PROTOCOL_FCP) && (pp->sg_id.proto_id != SCSI_PROTOCOL_ISCSI) )
 		return snprintf(buff, len, "[undef]");
-	sprintf(host_id, "host%d", pp->sg_id.host_no);
-	host_dev = udev_device_new_from_subsystem_sysname(udev, "fc_host",
-							  host_id);
-	if (!host_dev) {
-		condlog(1, "%s: No fc_host device for '%s'", pp->dev, host_id);
-		goto out;
+	if((pp->sg_id.proto_id == SCSI_PROTOCOL_ISCSI) && strcmp(buff, wwid) == 0)
+		
+    if(pp->sg_id.proto_id == SCSI_PROTOCOL_FCP)
+    {
+		sprintf(host_id, "host%d", pp->sg_id.host_no);
+		host_dev = udev_device_new_from_subsystem_sysname(udev, "fc_host",
+								  host_id);
+		if (!host_dev) {
+			condlog(1, "%s: No fc_host device for '%s'", pp->dev, host_id);
+			goto out;
+		}
+		value = udev_device_get_sysattr_value(host_dev, attr);
+		if (value)
+			ret = snprint_str(buff, len, value);
+		udev_device_unref(host_dev);
+    }
+	else if(pp->sg_id.proto_id == SCSI_PROTOCOL_ISCSI)
+	{
+	    sprintf(host_id, "session%d", pp->sg_id.transport_id);
+		host_dev = udev_device_new_from_subsystem_sysname(udev, "iscsi_session",
+								  host_id);
+		if (!host_dev) {
+			condlog(3, "%s: No iscsi_session for '%s'", pp->dev, host_id);
+			goto out;
+		}
+		value = udev_device_get_sysattr_value(host_dev, attr);
+		if (value)
+			ret = snprint_str(buff, len, value);
+		udev_device_unref(host_dev);
 	}
-	value = udev_device_get_sysattr_value(host_dev, attr);
-	if (value)
-		ret = snprint_str(buff, len, value);
-	udev_device_unref(host_dev);
 out:
 	if (!value)
 		ret = snprintf(buff, len, "[unknown]");
@@ -562,7 +581,14 @@ out:
 int
 snprint_host_wwnn (char * buff, size_t len, const struct path * pp)
 {
-	return snprint_host_attr(buff, len, pp, "node_name");
+	if(pp->sg_id.proto_id == SCSI_PROTOCOL_ISCSI)
+	{
+	    return snprint_host_attr(buff, len, pp, "initiatorname");
+	}
+	else
+	{
+		return snprint_host_attr(buff, len, pp, "node_name");
+	}
 }
 
 int
-- 
2.12.0.windows.1