Fix printing of node database again.

This fixes commit ec2afb8a1c997bac706de4f70a3a59fdd82b5741,
which aimed to make the return value from "iscsiadm -m node -P[01]"
return the correct value of "21", for no targets found. But
instead it make the output of all "iscsiadm -m node -P*" act like
the output of "iscsiadm -m node --op show", which was just wrong.

Instead, revert the above-mentioned commit, then add a simple
check for "no nodes" in print_nodes().

1 files changed, 50 insertions, 0 deletions

diff --git a/usr/iscsiadm.c b/usr/iscsiadm.c
index ef9ea84..22d62db 100644
--- a/usr/iscsiadm.c
+++ b/usr/iscsiadm.c
@@ -681,6 +681,14 @@ static int login_portals(struct node_rec *pattern_rec)
 	return rc;
 }
 
+static void print_node_flat(struct iscsi_node *node)
+{
+		printf("%s,%" PRIu16 " %s\n",
+		       iscsi_node_portal_get(node),
+		       iscsi_node_tpgt_get(node),
+		       iscsi_node_target_name_get(node));
+}
+
 // The 'iface_mode' argument is only used for command
 //	`iscsiadm -m iface -P 1`
 static void print_nodes_tree(struct iscsi_node **nodes, uint32_t node_count,
@@ -710,6 +718,40 @@ static void print_nodes_tree(struct iscsi_node **nodes, uint32_t node_count,
 	}
 }
 
+static int print_nodes(struct iscsi_context *ctx, int info_level)
+{
+	struct iscsi_node **nodes = NULL;
+	uint32_t node_count = 0;
+	uint32_t i = 0;
+	int rc = 0;
+
+	if ((info_level != 0) && (info_level != -1) && (info_level != 1)) {
+		log_error("Invalid info level %d. Try 0 or 1.", info_level);
+		rc = ISCSI_ERR_INVAL;
+		goto out;
+	}
+
+	rc = iscsi_nodes_get(ctx, &nodes, &node_count);
+	if (rc != LIBISCSI_OK)
+		goto out;
+
+	if (!node_count) {
+		log_error("No records found");
+		rc = ISCSI_ERR_NO_OBJS_FOUND;
+		goto out;
+	}
+
+	if (info_level == 1)
+		print_nodes_tree(nodes, node_count, _PRINT_MODE_NODE);
+	else
+		for (i = 0; i < node_count; ++i)
+			print_node_flat(nodes[i]);
+
+out:
+	iscsi_nodes_free(nodes, node_count);
+	return rc;
+}
+
 static int print_nodes_config(struct iscsi_context *ctx, bool show_secret,
 			      const char *target_name, const char *address,
 			      int32_t port, const char *iface_name)
@@ -2780,6 +2822,14 @@ static int exec_node_op(struct iscsi_context *ctx, int op, int do_login,
 		goto out;
 	}
 
+	if ((!do_login && !do_logout && op == OP_NOOP) &&
+	    ((rec == NULL) ||
+	     (!strlen(rec->name) && !strlen(rec->conn[0].address) &&
+	      !strlen(rec->iface.name)))) {
+		rc = print_nodes(ctx, info_level);
+		goto out;
+	}
+
 	if (do_login) {
 		rc = login_portals(rec);
 		goto out;