swconfig: implement uci loading support

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@15315 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 224 insertions, 0 deletions

diff --git a/package/swconfig/src/uci.c b/package/swconfig/src/uci.c
new file mode 100644
index 0000000000..2df837d278
--- /dev/null
+++ b/package/swconfig/src/uci.c
@@ -0,0 +1,224 @@
+/*
+ * uci.c: UCI binding for the switch configuration utility
+ *
+ * Copyright (C) 2009 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundatio.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <stdint.h>
+#include <getopt.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <uci.h>
+
+#include <linux/types.h>
+#include <linux/netlink.h>
+#include <linux/genetlink.h>
+#include <netlink/netlink.h>
+#include <netlink/genl/genl.h>
+#include <netlink/genl/ctrl.h>
+#include <linux/switch.h>
+#include "swlib.h"
+
+#ifndef ARRAY_SIZE
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
+#endif
+
+struct swlib_setting {
+	struct switch_attr *attr;
+	const char *name;
+	int port_vlan;
+	const char *val;
+	struct swlib_setting *next;
+};
+
+struct swlib_setting early_settings[] = {
+	{ .name = "reset" },
+	{ .name = "enable_vlan" },
+};
+
+static struct swlib_setting *settings;
+static struct swlib_setting **head;
+
+static int
+swlib_map_settings(struct switch_dev *dev, int type, int port_vlan, struct uci_section *s)
+{
+	struct swlib_setting *setting;
+	struct switch_attr *attr;
+	struct uci_element *e;
+	struct uci_option *o;
+	int i;
+
+	uci_foreach_element(&s->options, e) {
+		o = uci_to_option(e);
+
+		if (o->type != UCI_TYPE_STRING)
+			continue;
+
+		if (!strcmp(e->name, "device"))
+			continue;
+
+		/* map early settings */
+		if (type == SWLIB_ATTR_GROUP_GLOBAL) {
+			int i;
+
+			for (i = 0; i < ARRAY_SIZE(early_settings); i++) {
+				if (strcmp(e->name, early_settings[i].name) != 0)
+					continue;
+
+				early_settings[i].val = o->v.string;
+				goto skip;
+			}
+		}
+
+		attr = swlib_lookup_attr(dev, type, e->name);
+		if (!attr)
+			continue;
+
+		setting = malloc(sizeof(struct swlib_setting));
+		memset(setting, 0, sizeof(struct swlib_setting));
+		setting->attr = attr;
+		setting->port_vlan = port_vlan;
+		setting->val = o->v.string;
+		*head = setting;
+		head = &setting->next;
+skip:
+		continue;
+	}
+}
+
+int swlib_apply_from_uci(struct switch_dev *dev, struct uci_package *p)
+{
+	struct switch_attr *attr;
+	struct uci_context *ctx = p->ctx;
+	struct uci_element *e;
+	struct uci_section *s;
+	struct uci_option *o;
+	struct switch_val val;
+	int i;
+
+	settings = NULL;
+	head = &settings;
+
+	uci_foreach_element(&p->sections, e) {
+		s = uci_to_section(e);
+
+		if (strcmp(s->type, "switch") != 0)
+			continue;
+
+		if (strcmp(e->name, dev->dev_name) != 0)
+			continue;
+
+		goto found;
+	}
+
+	/* not found */
+	return -1;
+
+found:
+	/* look up available early options, which need to be taken care
+	 * of in the correct order */
+	for (i = 0; i < ARRAY_SIZE(early_settings); i++) {
+		early_settings[i].attr = swlib_lookup_attr(dev,
+			SWLIB_ATTR_GROUP_GLOBAL, early_settings[i].name);
+	}
+	swlib_map_settings(dev, SWLIB_ATTR_GROUP_GLOBAL, 0, s);
+
+	/* look for port or vlan sections */
+	uci_foreach_element(&p->sections, e) {
+		struct uci_element *os;
+		s = uci_to_section(e);
+
+		if (!strcmp(s->type, "switch_port")) {
+			char *devn, *port, *port_err = NULL;
+			int port_n;
+
+			uci_foreach_element(&s->options, os) {
+				o = uci_to_option(os);
+				if (o->type != UCI_TYPE_STRING)
+					continue;
+
+				if (!strcmp(os->name, "device")) {
+					devn = o->v.string;
+					if (strcmp(devn, dev->dev_name) != 0)
+						devn = NULL;
+				} else if (!strcmp(os->name, "port")) {
+					port = o->v.string;
+				}
+			}
+			if (!dev || !port || !port[0])
+				continue;
+
+			port_n = strtoul(port, &port_err, 0);
+			if (port_err && port_err[0])
+				continue;
+
+			swlib_map_settings(dev, SWLIB_ATTR_GROUP_PORT, port_n, s);
+		} else if (!strcmp(s->type, "switch_vlan")) {
+			char *devn, *vlan, *vlan_err = NULL;
+			int vlan_n;
+
+			uci_foreach_element(&s->options, os) {
+				o = uci_to_option(os);
+				if (o->type != UCI_TYPE_STRING)
+					continue;
+
+				if (!strcmp(os->name, "device")) {
+					devn = o->v.string;
+					if (strcmp(devn, dev->dev_name) != 0)
+						devn = NULL;
+				} else if (!strcmp(os->name, "vlan")) {
+					vlan = o->v.string;
+				}
+			}
+			if (!dev || !vlan || !vlan[0])
+				continue;
+
+			vlan_n = strtoul(vlan, &vlan_err, 0);
+			if (vlan_err && vlan_err[0])
+				continue;
+
+			swlib_map_settings(dev, SWLIB_ATTR_GROUP_VLAN, vlan_n, s);
+		}
+	}
+
+	for (i = 0; i < ARRAY_SIZE(early_settings); i++) {
+		struct swlib_setting *st = &early_settings[i];
+		if (!st->attr || !st->val)
+			continue;
+		swlib_set_attr_string(dev, st->attr, st->port_vlan, st->val);
+
+	}
+
+	while (settings) {
+		struct swlib_setting *st = settings;
+
+		swlib_set_attr_string(dev, st->attr, st->port_vlan, st->val);
+		st = st->next;
+		free(settings);
+		settings = st;
+	}
+
+	/* Apply the config */
+	attr = swlib_lookup_attr(dev, SWLIB_ATTR_GROUP_GLOBAL, "apply");
+	if (!attr)
+		return 0;
+
+	memset(&val, 0, sizeof(val));
+	swlib_set_attr(dev, attr, &val);
+
+	return 0;
+}