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@@ -0,0 +1,236 @@
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+/*
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+ * VLAN netlink control interface
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+ *
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+ * Copyright (c) 2007 Patrick McHardy <kaber@trash.net>
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+ *
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+ * This program is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU General Public License
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+ * version 2 as published by the Free Software Foundation.
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+ */
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+
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+#include <linux/kernel.h>
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+#include <linux/netdevice.h>
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+#include <linux/if_vlan.h>
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+#include <net/netlink.h>
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+#include <net/rtnetlink.h>
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+#include "vlan.h"
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+
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+
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+static const struct nla_policy vlan_policy[IFLA_VLAN_MAX + 1] = {
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+ [IFLA_VLAN_ID] = { .type = NLA_U16 },
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+ [IFLA_VLAN_FLAGS] = { .len = sizeof(struct ifla_vlan_flags) },
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+ [IFLA_VLAN_EGRESS_QOS] = { .type = NLA_NESTED },
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+ [IFLA_VLAN_INGRESS_QOS] = { .type = NLA_NESTED },
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+};
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+
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+static const struct nla_policy vlan_map_policy[IFLA_VLAN_QOS_MAX + 1] = {
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+ [IFLA_VLAN_QOS_MAPPING] = { .len = sizeof(struct ifla_vlan_qos_mapping) },
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+};
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+
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+
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+static inline int vlan_validate_qos_map(struct nlattr *attr)
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+{
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+ if (!attr)
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+ return 0;
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+ return nla_validate_nested(attr, IFLA_VLAN_QOS_MAX, vlan_map_policy);
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+}
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+
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+static int vlan_validate(struct nlattr *tb[], struct nlattr *data[])
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+{
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+ struct ifla_vlan_flags *flags;
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+ u16 id;
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+ int err;
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+
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+ if (!data)
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+ return -EINVAL;
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+
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+ if (data[IFLA_VLAN_ID]) {
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+ id = nla_get_u16(data[IFLA_VLAN_ID]);
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+ if (id >= VLAN_VID_MASK)
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+ return -ERANGE;
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+ }
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+ if (data[IFLA_VLAN_FLAGS]) {
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+ flags = nla_data(data[IFLA_VLAN_FLAGS]);
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+ if ((flags->flags & flags->mask) & ~VLAN_FLAG_REORDER_HDR)
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+ return -EINVAL;
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+ }
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+
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+ err = vlan_validate_qos_map(data[IFLA_VLAN_INGRESS_QOS]);
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+ if (err < 0)
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+ return err;
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+ err = vlan_validate_qos_map(data[IFLA_VLAN_EGRESS_QOS]);
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+ if (err < 0)
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+ return err;
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+ return 0;
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+}
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+
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+static int vlan_changelink(struct net_device *dev,
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+ struct nlattr *tb[], struct nlattr *data[])
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+{
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+ struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev);
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+ struct ifla_vlan_flags *flags;
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+ struct ifla_vlan_qos_mapping *m;
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+ struct nlattr *attr;
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+ int rem;
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+
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+ if (data[IFLA_VLAN_FLAGS]) {
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+ flags = nla_data(data[IFLA_VLAN_FLAGS]);
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+ vlan->flags = (vlan->flags & ~flags->mask) |
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+ (flags->flags & flags->mask);
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+ }
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+ if (data[IFLA_VLAN_INGRESS_QOS]) {
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+ nla_for_each_nested(attr, data[IFLA_VLAN_INGRESS_QOS], rem) {
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+ m = nla_data(attr);
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+ vlan_dev_set_ingress_priority(dev, m->to, m->from);
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+ }
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+ }
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+ if (data[IFLA_VLAN_EGRESS_QOS]) {
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+ nla_for_each_nested(attr, data[IFLA_VLAN_EGRESS_QOS], rem) {
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+ m = nla_data(attr);
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+ vlan_dev_set_egress_priority(dev, m->from, m->to);
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+ }
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+ }
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+ return 0;
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+}
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+
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+static int vlan_newlink(struct net_device *dev,
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+ struct nlattr *tb[], struct nlattr *data[])
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+{
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+ struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev);
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+ struct net_device *real_dev;
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+ int err;
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+
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+ if (!data[IFLA_VLAN_ID])
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+ return -EINVAL;
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+
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+ if (!tb[IFLA_LINK])
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+ return -EINVAL;
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+ real_dev = __dev_get_by_index(nla_get_u32(tb[IFLA_LINK]));
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+ if (!real_dev)
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+ return -ENODEV;
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+
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+ vlan->vlan_id = nla_get_u16(data[IFLA_VLAN_ID]);
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+ vlan->real_dev = real_dev;
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+ vlan->flags = VLAN_FLAG_REORDER_HDR;
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+
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+ err = vlan_check_real_dev(real_dev, vlan->vlan_id);
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+ if (err < 0)
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+ return err;
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+
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+ if (!tb[IFLA_MTU])
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+ dev->mtu = real_dev->mtu;
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+ else if (dev->mtu > real_dev->mtu)
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+ return -EINVAL;
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+
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+ err = vlan_changelink(dev, tb, data);
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+ if (err < 0)
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+ return err;
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+
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+ return register_vlan_dev(dev);
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+}
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+
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+static void vlan_dellink(struct net_device *dev)
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+{
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+ unregister_vlan_device(dev);
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+}
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+
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+static inline size_t vlan_qos_map_size(unsigned int n)
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+{
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+ if (n == 0)
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+ return 0;
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+ /* IFLA_VLAN_{EGRESS,INGRESS}_QOS + n * IFLA_VLAN_QOS_MAPPING */
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+ return nla_total_size(sizeof(struct nlattr)) +
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+ nla_total_size(sizeof(struct ifla_vlan_qos_mapping)) * n;
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+}
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+
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+static size_t vlan_get_size(const struct net_device *dev)
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+{
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+ struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev);
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+
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+ return nla_total_size(2) + /* IFLA_VLAN_ID */
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+ vlan_qos_map_size(vlan->nr_ingress_mappings) +
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+ vlan_qos_map_size(vlan->nr_egress_mappings);
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+}
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+
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+static int vlan_fill_info(struct sk_buff *skb, const struct net_device *dev)
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+{
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+ struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev);
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+ struct vlan_priority_tci_mapping *pm;
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+ struct ifla_vlan_flags f;
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+ struct ifla_vlan_qos_mapping m;
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+ struct nlattr *nest;
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+ unsigned int i;
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+
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+ NLA_PUT_U16(skb, IFLA_VLAN_ID, VLAN_DEV_INFO(dev)->vlan_id);
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+ if (vlan->flags) {
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+ f.flags = vlan->flags;
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+ f.mask = ~0;
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+ NLA_PUT(skb, IFLA_VLAN_FLAGS, sizeof(f), &f);
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+ }
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+ if (vlan->nr_ingress_mappings) {
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+ nest = nla_nest_start(skb, IFLA_VLAN_INGRESS_QOS);
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+ if (nest == NULL)
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+ goto nla_put_failure;
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+
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+ for (i = 0; i < ARRAY_SIZE(vlan->ingress_priority_map); i++) {
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+ if (!vlan->ingress_priority_map[i])
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+ continue;
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+
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+ m.from = i;
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+ m.to = vlan->ingress_priority_map[i];
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+ NLA_PUT(skb, IFLA_VLAN_QOS_MAPPING,
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+ sizeof(m), &m);
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+ }
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+ nla_nest_end(skb, nest);
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+ }
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+
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+ if (vlan->nr_egress_mappings) {
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+ nest = nla_nest_start(skb, IFLA_VLAN_EGRESS_QOS);
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+ if (nest == NULL)
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+ goto nla_put_failure;
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+
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+ for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) {
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+ for (pm = vlan->egress_priority_map[i]; pm;
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+ pm = pm->next) {
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+ if (!pm->vlan_qos)
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+ continue;
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+
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+ m.from = pm->priority;
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+ m.to = (pm->vlan_qos >> 13) & 0x7;
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+ NLA_PUT(skb, IFLA_VLAN_QOS_MAPPING,
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+ sizeof(m), &m);
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+ }
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+ }
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+ nla_nest_end(skb, nest);
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+ }
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+ return 0;
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+
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+nla_put_failure:
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+ return -EMSGSIZE;
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+}
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+
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+struct rtnl_link_ops vlan_link_ops __read_mostly = {
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+ .kind = "vlan",
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+ .maxtype = IFLA_VLAN_MAX,
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+ .policy = vlan_policy,
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+ .priv_size = sizeof(struct vlan_dev_info),
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+ .setup = vlan_setup,
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+ .validate = vlan_validate,
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+ .newlink = vlan_newlink,
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+ .changelink = vlan_changelink,
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+ .dellink = vlan_dellink,
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+ .get_size = vlan_get_size,
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+ .fill_info = vlan_fill_info,
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+};
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+
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+int __init vlan_netlink_init(void)
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+{
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+ return rtnl_link_register(&vlan_link_ops);
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+}
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+
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+void __exit vlan_netlink_fini(void)
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+{
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+ rtnl_link_unregister(&vlan_link_ops);
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+}
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+
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+MODULE_ALIAS_RTNL_LINK("vlan");
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Patrick McHardy