From 9ec29d3648904002f92b7d2b0732a820e44c5f4b Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Mon, 25 Jun 2012 00:55:17 +0200
Subject: add netdev ifindex support

---
 instance.c | 50 +++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 49 insertions(+), 1 deletion(-)

(limited to 'instance.c')

diff --git a/instance.c b/instance.c
index c70fff6..19454c7 100644
--- a/instance.c
+++ b/instance.c
@@ -1,3 +1,6 @@
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <net/if.h>
 #include <unistd.h>
 
 #include "procd.h"
@@ -8,6 +11,7 @@ enum {
 	INSTANCE_ATTR_COMMAND,
 	INSTANCE_ATTR_ENV,
 	INSTANCE_ATTR_DATA,
+	INSTANCE_ATTR_NETDEV,
 	__INSTANCE_ATTR_MAX
 };
 
@@ -15,6 +19,12 @@ static const struct blobmsg_policy instance_attr[__INSTANCE_ATTR_MAX] = {
 	[INSTANCE_ATTR_COMMAND] = { "command", BLOBMSG_TYPE_ARRAY },
 	[INSTANCE_ATTR_ENV] = { "env", BLOBMSG_TYPE_TABLE },
 	[INSTANCE_ATTR_DATA] = { "data", BLOBMSG_TYPE_TABLE },
+	[INSTANCE_ATTR_NETDEV] = { "netdev", BLOBMSG_TYPE_ARRAY },
+};
+
+struct instance_netdev {
+	struct blobmsg_list_node node;
+	int ifindex;
 };
 
 static void
@@ -116,9 +126,29 @@ instance_config_changed(struct service_instance *in, struct service_instance *in
 	if (!blobmsg_list_equal(&in->data, &in_new->data))
 		return true;
 
+	if (!blobmsg_list_equal(&in->netdev, &in_new->netdev))
+		return true;
+
 	return false;
 }
 
+static bool
+instance_netdev_cmp(struct blobmsg_list_node *l1, struct blobmsg_list_node *l2)
+{
+	struct instance_netdev *n1 = container_of(l1, struct instance_netdev, node);
+	struct instance_netdev *n2 = container_of(l2, struct instance_netdev, node);
+
+	return n1->ifindex == n2->ifindex;
+}
+
+static void
+instance_netdev_update(struct blobmsg_list_node *l)
+{
+	struct instance_netdev *n = container_of(l, struct instance_netdev, node);
+
+	n->ifindex = if_nametoindex(n->node.avl.key);
+}
+
 static bool
 instance_config_parse(struct service_instance *in)
 {
@@ -149,15 +179,28 @@ instance_config_parse(struct service_instance *in)
 	if ((cur = tb[INSTANCE_ATTR_ENV])) {
 		if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING))
 			return false;
+
 		blobmsg_list_fill(&in->env, blobmsg_data(cur), blobmsg_data_len(cur), false);
 	}
 
 	if ((cur = tb[INSTANCE_ATTR_DATA])) {
 		if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING))
 			return false;
+
 		blobmsg_list_fill(&in->data, blobmsg_data(cur), blobmsg_data_len(cur), false);
 	}
 
+	if ((cur = tb[INSTANCE_ATTR_NETDEV])) {
+		struct blobmsg_list_node *ndev;
+
+		if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING))
+			return false;
+
+		blobmsg_list_fill(&in->netdev, blobmsg_data(cur), blobmsg_data_len(cur), true);
+		blobmsg_list_for_each(&in->netdev, ndev)
+			instance_netdev_update(ndev);
+	}
+
 	return true;
 }
 
@@ -166,6 +209,7 @@ instance_config_cleanup(struct service_instance *in)
 {
 	blobmsg_list_free(&in->env);
 	blobmsg_list_free(&in->data);
+	blobmsg_list_free(&in->netdev);
 }
 
 static void
@@ -174,8 +218,12 @@ instance_config_move(struct service_instance *in, struct service_instance *in_sr
 	instance_config_cleanup(in);
 	blobmsg_list_move(&in->env, &in_src->env);
 	blobmsg_list_move(&in->data, &in_src->data);
+	blobmsg_list_move(&in->netdev, &in_src->netdev);
 	in->command = in_src->command;
 	in->name = in_src->name;
+	in->node.avl.key = in_src->node.avl.key;
+	in->config = in_src->config;
+	in_src->config = NULL;
 }
 
 bool
@@ -183,7 +231,6 @@ instance_update(struct service_instance *in, struct service_instance *in_new)
 {
 	bool changed = instance_config_changed(in, in_new);
 
-	in->config = in_new->config;
 	if (!changed)
 		return false;
 
@@ -211,6 +258,7 @@ instance_init(struct service_instance *in, struct service *s, struct blob_attr *
 	in->timeout.cb = instance_timeout;
 	in->proc.cb = instance_exit;
 
+	blobmsg_list_init(&in->netdev, struct instance_netdev, node, instance_netdev_cmp);
 	blobmsg_list_simple_init(&in->env);
 	blobmsg_list_simple_init(&in->data);
 	in->valid = instance_config_parse(in);
-- 
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