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5e75659305
Currently the UP/DOWN state of VLANs is synchronized to the state of the underlying device, meaning all VLANs are set down once the underlying device is set down. This causes all routes to the VLAN devices to vanish. Add a flag to specify a "loose binding" mode, in which only the operstate is transfered, but the VLAN device state is independant. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
260 lines
6.3 KiB
C
260 lines
6.3 KiB
C
/*
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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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#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/net_namespace.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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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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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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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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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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if (tb[IFLA_ADDRESS]) {
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if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
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return -EINVAL;
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if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
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return -EADDRNOTAVAIL;
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}
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if (!data)
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return -EINVAL;
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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) &
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~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP |
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VLAN_FLAG_LOOSE_BINDING))
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return -EINVAL;
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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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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 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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if (data[IFLA_VLAN_FLAGS]) {
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flags = nla_data(data[IFLA_VLAN_FLAGS]);
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vlan_dev_change_flags(dev, 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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static int vlan_get_tx_queues(struct net *net,
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struct nlattr *tb[],
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unsigned int *num_tx_queues,
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unsigned int *real_num_tx_queues)
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{
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struct net_device *real_dev;
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if (!tb[IFLA_LINK])
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return -EINVAL;
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real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
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if (!real_dev)
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return -ENODEV;
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*num_tx_queues = real_dev->num_tx_queues;
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*real_num_tx_queues = real_dev->real_num_tx_queues;
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return 0;
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}
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static int vlan_newlink(struct net *src_net, 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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if (!data[IFLA_VLAN_ID])
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return -EINVAL;
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if (!tb[IFLA_LINK])
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return -EINVAL;
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real_dev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
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if (!real_dev)
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return -ENODEV;
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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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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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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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err = vlan_changelink(dev, tb, data);
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if (err < 0)
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return err;
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return register_vlan_dev(dev);
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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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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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return nla_total_size(2) + /* IFLA_VLAN_ID */
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sizeof(struct ifla_vlan_flags) + /* IFLA_VLAN_FLAGS */
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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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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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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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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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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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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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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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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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nla_put_failure:
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return -EMSGSIZE;
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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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.get_tx_queues = vlan_get_tx_queues,
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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 = unregister_vlan_dev,
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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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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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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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MODULE_ALIAS_RTNL_LINK("vlan");
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