nvme-netapp: add nspath tlv handling

Add nspath tlv handling logic to the NetApp plugin.

Signed-off-by: Martin George <marting@netapp.com>

Author: martin-gpy

plugins/netapp/netapp-nvme.c

@@ -46,12 +46,14 @@ enum {
 enum {
 	ONTAP_C2_LOG_SUPPORTED_LSP	= 0x0,
 	ONTAP_C2_LOG_NSINFO_LSP		= 0x1,
+	ONTAP_C2_LOG_PLATFORM_LSP	= 0x2,
 };
 
 enum {
-	ONTAP_VSERVER_TLV		= 0x11,
-	ONTAP_VOLUME_TLV		= 0x12,
-	ONTAP_NS_TLV			= 0x13,
+	ONTAP_VSERVER_NAME_TLV		= 0x11,
+	ONTAP_VOLUME_NAME_TLV		= 0x12,
+	ONTAP_NS_NAME_TLV		= 0x13,
+	ONTAP_NS_PATH_TLV		= 0x14,
 };
 
 static const char *dev_path = "/dev/";
@@ -134,8 +136,10 @@ static void netapp_get_ontap_labels(char *vsname, char *nspath,
 		unsigned char *log_data)
 {
 	int lsp, tlv, label_len;
-	char *vserver_name, *volume_name, *namespace_name;
+	char *vserver_name, *volume_name, *namespace_name, *namespace_path;
 	char vol_name[ONTAP_LABEL_LEN], ns_name[ONTAP_LABEL_LEN];
+	char ns_path[ONTAP_LABEL_LEN];
+	bool nspath_tlv_available = false;
 	const char *ontap_vol = "/vol/";
 	int i, j;
 
@@ -145,9 +149,9 @@ static void netapp_get_ontap_labels(char *vsname, char *nspath,
 		/* lsp not related to nsinfo */
 		return;
 
-	/* get the vserver tlv and name */
+	/* get the vserver name tlv */
 	tlv = *(__u8 *)&log_data[32];
-	if (tlv == ONTAP_VSERVER_TLV) {
+	if (tlv == ONTAP_VSERVER_NAME_TLV) {
 		label_len = (*(__u16 *)&log_data[34]) * 4;
 		vserver_name = (char *)&log_data[36];
 		ontap_labels_to_str(vsname, vserver_name, label_len);
@@ -159,9 +163,9 @@ static void netapp_get_ontap_labels(char *vsname, char *nspath,
 
 	i = 36 + label_len;
 	j = i + 2;
-	/* get the volume tlv and name */
+	/* get the volume name tlv */
 	tlv = *(__u8 *)&log_data[i];
-	if (tlv == ONTAP_VOLUME_TLV) {
+	if (tlv == ONTAP_VOLUME_NAME_TLV) {
 		label_len = (*(__u16 *)&log_data[j]) * 4;
 		volume_name = (char *)&log_data[j + 2];
 		ontap_labels_to_str(vol_name, volume_name, label_len);
@@ -173,9 +177,9 @@ static void netapp_get_ontap_labels(char *vsname, char *nspath,
 
 	i += 4 + label_len;
 	j += 4 + label_len;
-	/* get the namespace tlv and name */
+	/* get the namespace name tlv */
 	tlv = *(__u8 *)&log_data[i];
-	if (tlv == ONTAP_NS_TLV) {
+	if (tlv == ONTAP_NS_NAME_TLV) {
 		label_len = (*(__u16 *)&log_data[j]) * 4;
 		namespace_name = (char *)&log_data[j + 2];
 		ontap_labels_to_str(ns_name, namespace_name, label_len);
@@ -185,8 +189,25 @@ static void netapp_get_ontap_labels(char *vsname, char *nspath,
 		return;
 	}
 
-	snprintf(nspath, ONTAP_NS_PATHLEN, "%s%s%s%s", ontap_vol,
+	i += 4 + label_len;
+	j += 4 + label_len;
+	/* get the namespace path tlv if available */
+	tlv = *(__u8 *)&log_data[i];
+	if (tlv == ONTAP_NS_PATH_TLV) {
+		nspath_tlv_available = true;
+		label_len = (*(__u16 *)&log_data[j]) * 4;
+		namespace_path = (char *)&log_data[j + 2];
+		ontap_labels_to_str(ns_path, namespace_path, label_len);
+	}
+
+	if (nspath_tlv_available) {
+		/* set nspath from the corresponding ns_path string */
+		snprintf(nspath, ONTAP_NS_PATHLEN, "%s", ns_path);
+	} else {
+		/* set nspath by concatenating ontap_vol with ns_name */
+		snprintf(nspath, ONTAP_NS_PATHLEN, "%s%s%s%s", ontap_vol,
 			vol_name, "/", ns_name);
+	}
 }
 
 static void netapp_smdevice_json(struct json_object *devices, char *devname,