[PATCH netifd] bridge: rename "ifname" attribute to "ports"

[Rafał Miłecki]

From: Rafał Miłecki <rafal at milecki.pl>

Bridge aggregates multiple ports so use a more accurate name ("ports").
For backward compatibility add a temporary config translation.

Config example:

config interface 'lan'
        option type 'bridge'
        list ports 'lan1'
        list ports 'lan2'

Signed-off-by: Rafał Miłecki <rafal at milecki.pl>
---
 bridge.c | 16 ++++++++--------
 config.c | 23 ++++++++++++++++++++++-
 2 files changed, 30 insertions(+), 9 deletions(-)

diff --git a/bridge.c b/bridge.c
index 099dfe4..a1f3992 100644
--- a/bridge.c
+++ b/bridge.c
@@ -23,7 +23,7 @@
 #include "system.h"
 
 enum {
-	BRIDGE_ATTR_IFNAME,
+	BRIDGE_ATTR_PORTS,
 	BRIDGE_ATTR_STP,
 	BRIDGE_ATTR_FORWARD_DELAY,
 	BRIDGE_ATTR_PRIORITY,
@@ -44,7 +44,7 @@ enum {
 };
 
 static const struct blobmsg_policy bridge_attrs[__BRIDGE_ATTR_MAX] = {
-	[BRIDGE_ATTR_IFNAME] = { "ifname", BLOBMSG_TYPE_ARRAY },
+	[BRIDGE_ATTR_PORTS] = { "ports", BLOBMSG_TYPE_ARRAY },
 	[BRIDGE_ATTR_STP] = { "stp", BLOBMSG_TYPE_BOOL },
 	[BRIDGE_ATTR_FORWARD_DELAY] = { "forward_delay", BLOBMSG_TYPE_INT32 },
 	[BRIDGE_ATTR_PRIORITY] = { "priority", BLOBMSG_TYPE_INT32 },
@@ -64,7 +64,7 @@ static const struct blobmsg_policy bridge_attrs[__BRIDGE_ATTR_MAX] = {
 };
 
 static const struct uci_blob_param_info bridge_attr_info[__BRIDGE_ATTR_MAX] = {
-	[BRIDGE_ATTR_IFNAME] = { .type = BLOBMSG_TYPE_STRING },
+	[BRIDGE_ATTR_PORTS] = { .type = BLOBMSG_TYPE_STRING },
 };
 
 static const struct uci_blob_param_list bridge_attr_list = {
@@ -104,7 +104,7 @@ struct bridge_state {
 
 	struct blob_attr *config_data;
 	struct bridge_config config;
-	struct blob_attr *ifnames;
+	struct blob_attr *ports;
 	bool active;
 	bool force_active;
 	bool has_vlans;
@@ -853,8 +853,8 @@ bridge_config_init(struct device *dev)
 
 	bst->n_failed = 0;
 	vlist_update(&bst->members);
-	if (bst->ifnames) {
-		blobmsg_for_each_attr(cur, bst->ifnames, rem) {
+	if (bst->ports) {
+		blobmsg_for_each_attr(cur, bst->ports, rem) {
 			bridge_add_member(bst, blobmsg_data(cur));
 		}
 	}
@@ -970,7 +970,7 @@ bridge_reload(struct device *dev, struct blob_attr *attr)
 	if (tb_dev[DEV_ATTR_MACADDR])
 		bst->primary_port = NULL;
 
-	bst->ifnames = tb_br[BRIDGE_ATTR_IFNAME];
+	bst->ports = tb_br[BRIDGE_ATTR_PORTS];
 	device_init_settings(dev, tb_dev);
 	bridge_apply_settings(bst, tb_br);
 
@@ -991,7 +991,7 @@ bridge_reload(struct device *dev, struct blob_attr *attr)
 
 		diff = 0;
 		uci_blob_diff(tb_br, otb_br, &bridge_attr_list, &diff);
-		if (diff & ~(1 << BRIDGE_ATTR_IFNAME))
+		if (diff & ~(1 << BRIDGE_ATTR_PORTS))
 		    ret = DEV_CONFIG_RESTART;
 
 		bridge_config_init(dev);
diff --git a/config.c b/config.c
index fa7cbe4..1f4560f 100644
--- a/config.c
+++ b/config.c
@@ -95,6 +95,24 @@ config_fixup_bridge_var(struct uci_section *s, const char *name, const char *val
 	uci_set(uci_ctx, &ptr);
 }
 
+/**
+ * config_fixup_bridge_ports - translate deprecated configs
+ *
+ * Old configs used "ifname" option for specifying bridge ports. For backward
+ * compatibility translate it into the new "ports" option.
+ */
+static void config_fixup_bridge_ports(struct uci_section *s)
+{
+	const char *ifname;
+
+	if (uci_lookup_option(uci_ctx, s, "ports"))
+		return;
+
+	ifname = uci_lookup_option_string(uci_ctx, s, "ifname");
+	if (ifname)
+		config_fixup_bridge_var(s, "ports", ifname);
+}
+
 static void
 config_fixup_bridge_vlan_filtering(struct uci_section *s, const char *name)
 {
@@ -117,6 +135,7 @@ config_parse_bridge_interface(struct uci_section *s, struct device_type *devtype
 	sprintf(name, "%s-%s", devtype->name_prefix, s->e.name);
 	blobmsg_add_string(&b, "name", name);
 
+	config_fixup_bridge_ports(s);
 	config_fixup_bridge_vlan_filtering(s, name);
 	uci_to_blob(&b, s, devtype->config_params);
 	if (!device_create(name, devtype, b.head)) {
@@ -254,8 +273,10 @@ config_init_devices(bool bridge)
 		if (!params)
 			params = simple_device_type.config_params;
 
-		if (devtype && devtype->bridge_capability)
+		if (devtype && devtype->bridge_capability) {
+			config_fixup_bridge_ports(s);
 			config_fixup_bridge_vlan_filtering(s, name);
+		}
 
 		blob_buf_init(&b, 0);
 		uci_to_blob(&b, s, params);
-- 
2.26.2