mirror of
https://github.com/torvalds/linux
synced 2024-11-05 18:23:50 +00:00
fceb6435e8
Pass the new extended ACK reporting struct to all of the generic netlink parsing functions. For now, pass NULL in almost all callers (except for some in the core.) Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
277 lines
6.8 KiB
C
277 lines
6.8 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 <linux/module.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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[IFLA_VLAN_PROTOCOL] = { .type = NLA_U16 },
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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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NULL);
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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_PROTOCOL]) {
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switch (nla_get_be16(data[IFLA_VLAN_PROTOCOL])) {
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case htons(ETH_P_8021Q):
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case htons(ETH_P_8021AD):
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break;
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default:
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return -EPROTONOSUPPORT;
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}
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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) &
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~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP |
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VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP))
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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_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_priv *vlan = vlan_dev_priv(dev);
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struct net_device *real_dev;
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unsigned int max_mtu;
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__be16 proto;
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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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if (data[IFLA_VLAN_PROTOCOL])
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proto = nla_get_be16(data[IFLA_VLAN_PROTOCOL]);
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else
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proto = htons(ETH_P_8021Q);
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vlan->vlan_proto = proto;
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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_proto, vlan->vlan_id);
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if (err < 0)
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return err;
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max_mtu = netif_reduces_vlan_mtu(real_dev) ? real_dev->mtu - VLAN_HLEN :
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real_dev->mtu;
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if (!tb[IFLA_MTU])
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dev->mtu = max_mtu;
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else if (dev->mtu > max_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_priv *vlan = vlan_dev_priv(dev);
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return nla_total_size(2) + /* IFLA_VLAN_PROTOCOL */
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nla_total_size(2) + /* IFLA_VLAN_ID */
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nla_total_size(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_priv *vlan = vlan_dev_priv(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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if (nla_put_be16(skb, IFLA_VLAN_PROTOCOL, vlan->vlan_proto) ||
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nla_put_u16(skb, IFLA_VLAN_ID, vlan->vlan_id))
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goto nla_put_failure;
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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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if (nla_put(skb, IFLA_VLAN_FLAGS, sizeof(f), &f))
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goto nla_put_failure;
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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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if (nla_put(skb, IFLA_VLAN_QOS_MAPPING,
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sizeof(m), &m))
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goto nla_put_failure;
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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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if (nla_put(skb, IFLA_VLAN_QOS_MAPPING,
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sizeof(m), &m))
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goto nla_put_failure;
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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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static struct net *vlan_get_link_net(const struct net_device *dev)
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{
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struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
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return dev_net(real_dev);
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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_priv),
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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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.get_link_net = vlan_get_link_net,
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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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