1119 lines
29 KiB
C
1119 lines
29 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/* -*- linux-c -*-
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* INET 802.1Q VLAN
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* Ethernet-type device handling.
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*
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* Authors: Ben Greear <greearb@candelatech.com>
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* Please send support related email to: netdev@vger.kernel.org
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* VLAN Home Page: http://www.candelatech.com/~greear/vlan.html
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*
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* Fixes: Mar 22 2001: Martin Bokaemper <mbokaemper@unispherenetworks.com>
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* - reset skb->pkt_type on incoming packets when MAC was changed
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* - see that changed MAC is saddr for outgoing packets
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* Oct 20, 2001: Ard van Breeman:
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* - Fix MC-list, finally.
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* - Flush MC-list on VLAN destroy.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/skbuff.h>
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#include <linux/netdevice.h>
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#include <linux/net_tstamp.h>
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#include <linux/etherdevice.h>
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#include <linux/ethtool.h>
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#include <linux/phy.h>
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#include <net/arp.h>
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#include <net/macsec.h>
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#include "vlan.h"
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#include "vlanproc.h"
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#include <linux/if_vlan.h>
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#include <linux/netpoll.h>
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/*
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* Create the VLAN header for an arbitrary protocol layer
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*
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* saddr=NULL means use device source address
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* daddr=NULL means leave destination address (eg unresolved arp)
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*
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* This is called when the SKB is moving down the stack towards the
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* physical devices.
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*/
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static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev,
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unsigned short type,
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const void *daddr, const void *saddr,
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unsigned int len)
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{
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struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
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struct vlan_hdr *vhdr;
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unsigned int vhdrlen = 0;
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u16 vlan_tci = 0;
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int rc;
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if (!(vlan->flags & VLAN_FLAG_REORDER_HDR)) {
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vhdr = skb_push(skb, VLAN_HLEN);
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vlan_tci = vlan->vlan_id;
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vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority);
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vhdr->h_vlan_TCI = htons(vlan_tci);
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/*
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* Set the protocol type. For a packet of type ETH_P_802_3/2 we
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* put the length in here instead.
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*/
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if (type != ETH_P_802_3 && type != ETH_P_802_2)
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vhdr->h_vlan_encapsulated_proto = htons(type);
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else
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vhdr->h_vlan_encapsulated_proto = htons(len);
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skb->protocol = vlan->vlan_proto;
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type = ntohs(vlan->vlan_proto);
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vhdrlen = VLAN_HLEN;
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}
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/* Before delegating work to the lower layer, enter our MAC-address */
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if (saddr == NULL)
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saddr = dev->dev_addr;
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/* Now make the underlying real hard header */
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dev = vlan->real_dev;
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rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen);
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if (rc > 0)
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rc += vhdrlen;
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return rc;
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}
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static inline netdev_tx_t vlan_netpoll_send_skb(struct vlan_dev_priv *vlan, struct sk_buff *skb)
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{
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#ifdef CONFIG_NET_POLL_CONTROLLER
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return netpoll_send_skb(vlan->netpoll, skb);
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#else
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BUG();
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return NETDEV_TX_OK;
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#endif
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}
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static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb,
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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_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
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unsigned int len;
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int ret;
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/* Handle non-VLAN frames if they are sent to us, for example by DHCP.
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*
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* NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING
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* OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs...
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*/
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if (vlan->flags & VLAN_FLAG_REORDER_HDR ||
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veth->h_vlan_proto != vlan->vlan_proto) {
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u16 vlan_tci;
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vlan_tci = vlan->vlan_id;
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vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority);
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__vlan_hwaccel_put_tag(skb, vlan->vlan_proto, vlan_tci);
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}
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skb->dev = vlan->real_dev;
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len = skb->len;
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if (unlikely(netpoll_tx_running(dev)))
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return vlan_netpoll_send_skb(vlan, skb);
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ret = dev_queue_xmit(skb);
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if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
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struct vlan_pcpu_stats *stats;
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stats = this_cpu_ptr(vlan->vlan_pcpu_stats);
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u64_stats_update_begin(&stats->syncp);
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u64_stats_inc(&stats->tx_packets);
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u64_stats_add(&stats->tx_bytes, len);
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u64_stats_update_end(&stats->syncp);
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} else {
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this_cpu_inc(vlan->vlan_pcpu_stats->tx_dropped);
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}
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return ret;
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}
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static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu)
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{
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struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
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unsigned int max_mtu = real_dev->mtu;
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if (netif_reduces_vlan_mtu(real_dev))
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max_mtu -= VLAN_HLEN;
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if (max_mtu < new_mtu)
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return -ERANGE;
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dev->mtu = new_mtu;
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return 0;
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}
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void vlan_dev_set_ingress_priority(const struct net_device *dev,
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u32 skb_prio, u16 vlan_prio)
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{
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struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
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if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio)
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vlan->nr_ingress_mappings--;
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else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio)
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vlan->nr_ingress_mappings++;
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vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio;
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}
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int vlan_dev_set_egress_priority(const struct net_device *dev,
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u32 skb_prio, u16 vlan_prio)
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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 *mp = NULL;
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struct vlan_priority_tci_mapping *np;
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u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK;
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/* See if a priority mapping exists.. */
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mp = vlan->egress_priority_map[skb_prio & 0xF];
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while (mp) {
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if (mp->priority == skb_prio) {
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if (mp->vlan_qos && !vlan_qos)
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vlan->nr_egress_mappings--;
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else if (!mp->vlan_qos && vlan_qos)
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vlan->nr_egress_mappings++;
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mp->vlan_qos = vlan_qos;
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return 0;
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}
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mp = mp->next;
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}
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/* Create a new mapping then. */
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mp = vlan->egress_priority_map[skb_prio & 0xF];
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np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL);
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if (!np)
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return -ENOBUFS;
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np->next = mp;
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np->priority = skb_prio;
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np->vlan_qos = vlan_qos;
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/* Before inserting this element in hash table, make sure all its fields
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* are committed to memory.
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* coupled with smp_rmb() in vlan_dev_get_egress_qos_mask()
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*/
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smp_wmb();
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vlan->egress_priority_map[skb_prio & 0xF] = np;
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if (vlan_qos)
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vlan->nr_egress_mappings++;
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return 0;
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}
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/* Flags are defined in the vlan_flags enum in
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* include/uapi/linux/if_vlan.h file.
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*/
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int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask)
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{
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struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
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u32 old_flags = vlan->flags;
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if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP |
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VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP |
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VLAN_FLAG_BRIDGE_BINDING))
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return -EINVAL;
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vlan->flags = (old_flags & ~mask) | (flags & mask);
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if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) {
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if (vlan->flags & VLAN_FLAG_GVRP)
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vlan_gvrp_request_join(dev);
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else
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vlan_gvrp_request_leave(dev);
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}
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if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) {
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if (vlan->flags & VLAN_FLAG_MVRP)
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vlan_mvrp_request_join(dev);
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else
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vlan_mvrp_request_leave(dev);
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}
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return 0;
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}
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void vlan_dev_get_realdev_name(const struct net_device *dev, char *result, size_t size)
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{
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strscpy_pad(result, vlan_dev_priv(dev)->real_dev->name, size);
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}
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bool vlan_dev_inherit_address(struct net_device *dev,
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struct net_device *real_dev)
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{
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if (dev->addr_assign_type != NET_ADDR_STOLEN)
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return false;
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eth_hw_addr_set(dev, real_dev->dev_addr);
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call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
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return true;
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}
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static int vlan_dev_open(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 net_device *real_dev = vlan->real_dev;
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int err;
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if (!(real_dev->flags & IFF_UP) &&
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!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
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return -ENETDOWN;
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if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr) &&
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!vlan_dev_inherit_address(dev, real_dev)) {
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err = dev_uc_add(real_dev, dev->dev_addr);
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if (err < 0)
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goto out;
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}
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if (dev->flags & IFF_ALLMULTI) {
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err = dev_set_allmulti(real_dev, 1);
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if (err < 0)
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goto del_unicast;
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}
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if (dev->flags & IFF_PROMISC) {
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err = dev_set_promiscuity(real_dev, 1);
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if (err < 0)
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goto clear_allmulti;
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}
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ether_addr_copy(vlan->real_dev_addr, real_dev->dev_addr);
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if (vlan->flags & VLAN_FLAG_GVRP)
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vlan_gvrp_request_join(dev);
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if (vlan->flags & VLAN_FLAG_MVRP)
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vlan_mvrp_request_join(dev);
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if (netif_carrier_ok(real_dev) &&
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!(vlan->flags & VLAN_FLAG_BRIDGE_BINDING))
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netif_carrier_on(dev);
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return 0;
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clear_allmulti:
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if (dev->flags & IFF_ALLMULTI)
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dev_set_allmulti(real_dev, -1);
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del_unicast:
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if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
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dev_uc_del(real_dev, dev->dev_addr);
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out:
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netif_carrier_off(dev);
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return err;
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}
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static int vlan_dev_stop(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 net_device *real_dev = vlan->real_dev;
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dev_mc_unsync(real_dev, dev);
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dev_uc_unsync(real_dev, dev);
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if (dev->flags & IFF_ALLMULTI)
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dev_set_allmulti(real_dev, -1);
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if (dev->flags & IFF_PROMISC)
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dev_set_promiscuity(real_dev, -1);
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if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
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dev_uc_del(real_dev, dev->dev_addr);
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if (!(vlan->flags & VLAN_FLAG_BRIDGE_BINDING))
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netif_carrier_off(dev);
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return 0;
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}
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static int vlan_dev_set_mac_address(struct net_device *dev, void *p)
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{
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struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
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struct sockaddr *addr = p;
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int err;
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if (!is_valid_ether_addr(addr->sa_data))
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return -EADDRNOTAVAIL;
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if (!(dev->flags & IFF_UP))
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goto out;
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if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) {
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err = dev_uc_add(real_dev, addr->sa_data);
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if (err < 0)
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return err;
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}
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if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
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dev_uc_del(real_dev, dev->dev_addr);
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out:
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eth_hw_addr_set(dev, addr->sa_data);
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return 0;
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}
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static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
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{
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struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
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const struct net_device_ops *ops = real_dev->netdev_ops;
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struct ifreq ifrr;
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int err = -EOPNOTSUPP;
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strscpy_pad(ifrr.ifr_name, real_dev->name, IFNAMSIZ);
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ifrr.ifr_ifru = ifr->ifr_ifru;
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switch (cmd) {
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case SIOCSHWTSTAMP:
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if (!net_eq(dev_net(dev), dev_net(real_dev)))
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break;
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fallthrough;
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case SIOCGMIIPHY:
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case SIOCGMIIREG:
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case SIOCSMIIREG:
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case SIOCGHWTSTAMP:
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if (netif_device_present(real_dev) && ops->ndo_eth_ioctl)
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err = ops->ndo_eth_ioctl(real_dev, &ifrr, cmd);
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break;
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}
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if (!err)
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ifr->ifr_ifru = ifrr.ifr_ifru;
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return err;
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}
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static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa)
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{
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struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
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const struct net_device_ops *ops = real_dev->netdev_ops;
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int err = 0;
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if (netif_device_present(real_dev) && ops->ndo_neigh_setup)
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err = ops->ndo_neigh_setup(real_dev, pa);
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return err;
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}
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#if IS_ENABLED(CONFIG_FCOE)
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static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid,
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struct scatterlist *sgl, unsigned int sgc)
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{
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struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
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const struct net_device_ops *ops = real_dev->netdev_ops;
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int rc = 0;
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if (ops->ndo_fcoe_ddp_setup)
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rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc);
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return rc;
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}
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static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid)
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{
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struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
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const struct net_device_ops *ops = real_dev->netdev_ops;
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int len = 0;
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if (ops->ndo_fcoe_ddp_done)
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len = ops->ndo_fcoe_ddp_done(real_dev, xid);
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return len;
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}
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static int vlan_dev_fcoe_enable(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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const struct net_device_ops *ops = real_dev->netdev_ops;
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int rc = -EINVAL;
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if (ops->ndo_fcoe_enable)
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rc = ops->ndo_fcoe_enable(real_dev);
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return rc;
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}
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static int vlan_dev_fcoe_disable(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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const struct net_device_ops *ops = real_dev->netdev_ops;
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int rc = -EINVAL;
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if (ops->ndo_fcoe_disable)
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rc = ops->ndo_fcoe_disable(real_dev);
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return rc;
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}
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static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid,
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struct scatterlist *sgl, unsigned int sgc)
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{
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struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
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const struct net_device_ops *ops = real_dev->netdev_ops;
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int rc = 0;
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if (ops->ndo_fcoe_ddp_target)
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rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc);
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return rc;
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}
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#endif
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#ifdef NETDEV_FCOE_WWNN
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static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type)
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{
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struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
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const struct net_device_ops *ops = real_dev->netdev_ops;
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int rc = -EINVAL;
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if (ops->ndo_fcoe_get_wwn)
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rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type);
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return rc;
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}
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|
#endif
|
|
|
|
static void vlan_dev_change_rx_flags(struct net_device *dev, int change)
|
|
{
|
|
struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
|
|
|
|
if (dev->flags & IFF_UP) {
|
|
if (change & IFF_ALLMULTI)
|
|
dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
|
|
if (change & IFF_PROMISC)
|
|
dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1);
|
|
}
|
|
}
|
|
|
|
static void vlan_dev_set_rx_mode(struct net_device *vlan_dev)
|
|
{
|
|
dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
|
|
dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
|
|
}
|
|
|
|
/*
|
|
* vlan network devices have devices nesting below it, and are a special
|
|
* "super class" of normal network devices; split their locks off into a
|
|
* separate class since they always nest.
|
|
*/
|
|
static struct lock_class_key vlan_netdev_xmit_lock_key;
|
|
static struct lock_class_key vlan_netdev_addr_lock_key;
|
|
|
|
static void vlan_dev_set_lockdep_one(struct net_device *dev,
|
|
struct netdev_queue *txq,
|
|
void *unused)
|
|
{
|
|
lockdep_set_class(&txq->_xmit_lock, &vlan_netdev_xmit_lock_key);
|
|
}
|
|
|
|
static void vlan_dev_set_lockdep_class(struct net_device *dev)
|
|
{
|
|
lockdep_set_class(&dev->addr_list_lock,
|
|
&vlan_netdev_addr_lock_key);
|
|
netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, NULL);
|
|
}
|
|
|
|
static __be16 vlan_parse_protocol(const struct sk_buff *skb)
|
|
{
|
|
struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
|
|
|
|
return __vlan_get_protocol(skb, veth->h_vlan_proto, NULL);
|
|
}
|
|
|
|
static const struct header_ops vlan_header_ops = {
|
|
.create = vlan_dev_hard_header,
|
|
.parse = eth_header_parse,
|
|
.parse_protocol = vlan_parse_protocol,
|
|
};
|
|
|
|
static int vlan_passthru_hard_header(struct sk_buff *skb, struct net_device *dev,
|
|
unsigned short type,
|
|
const void *daddr, const void *saddr,
|
|
unsigned int len)
|
|
{
|
|
struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
|
|
struct net_device *real_dev = vlan->real_dev;
|
|
|
|
if (saddr == NULL)
|
|
saddr = dev->dev_addr;
|
|
|
|
return dev_hard_header(skb, real_dev, type, daddr, saddr, len);
|
|
}
|
|
|
|
static const struct header_ops vlan_passthru_header_ops = {
|
|
.create = vlan_passthru_hard_header,
|
|
.parse = eth_header_parse,
|
|
.parse_protocol = vlan_parse_protocol,
|
|
};
|
|
|
|
static struct device_type vlan_type = {
|
|
.name = "vlan",
|
|
};
|
|
|
|
static const struct net_device_ops vlan_netdev_ops;
|
|
|
|
static int vlan_dev_init(struct net_device *dev)
|
|
{
|
|
struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
|
|
struct net_device *real_dev = vlan->real_dev;
|
|
|
|
netif_carrier_off(dev);
|
|
|
|
/* IFF_BROADCAST|IFF_MULTICAST; ??? */
|
|
dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI |
|
|
IFF_MASTER | IFF_SLAVE);
|
|
dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) |
|
|
(1<<__LINK_STATE_DORMANT))) |
|
|
(1<<__LINK_STATE_PRESENT);
|
|
|
|
if (vlan->flags & VLAN_FLAG_BRIDGE_BINDING)
|
|
dev->state |= (1 << __LINK_STATE_NOCARRIER);
|
|
|
|
dev->hw_features = NETIF_F_HW_CSUM | NETIF_F_SG |
|
|
NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE |
|
|
NETIF_F_GSO_ENCAP_ALL |
|
|
NETIF_F_HIGHDMA | NETIF_F_SCTP_CRC |
|
|
NETIF_F_ALL_FCOE;
|
|
|
|
if (real_dev->vlan_features & NETIF_F_HW_MACSEC)
|
|
dev->hw_features |= NETIF_F_HW_MACSEC;
|
|
|
|
dev->features |= dev->hw_features | NETIF_F_LLTX;
|
|
netif_inherit_tso_max(dev, real_dev);
|
|
if (dev->features & NETIF_F_VLAN_FEATURES)
|
|
netdev_warn(real_dev, "VLAN features are set incorrectly. Q-in-Q configurations may not work correctly.\n");
|
|
|
|
dev->vlan_features = real_dev->vlan_features & ~NETIF_F_ALL_FCOE;
|
|
dev->hw_enc_features = vlan_tnl_features(real_dev);
|
|
dev->mpls_features = real_dev->mpls_features;
|
|
|
|
/* ipv6 shared card related stuff */
|
|
dev->dev_id = real_dev->dev_id;
|
|
|
|
if (is_zero_ether_addr(dev->dev_addr)) {
|
|
eth_hw_addr_set(dev, real_dev->dev_addr);
|
|
dev->addr_assign_type = NET_ADDR_STOLEN;
|
|
}
|
|
if (is_zero_ether_addr(dev->broadcast))
|
|
memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
|
|
|
|
#if IS_ENABLED(CONFIG_FCOE)
|
|
dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid;
|
|
#endif
|
|
|
|
dev->needed_headroom = real_dev->needed_headroom;
|
|
if (vlan_hw_offload_capable(real_dev->features, vlan->vlan_proto)) {
|
|
dev->header_ops = &vlan_passthru_header_ops;
|
|
dev->hard_header_len = real_dev->hard_header_len;
|
|
} else {
|
|
dev->header_ops = &vlan_header_ops;
|
|
dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN;
|
|
}
|
|
|
|
dev->netdev_ops = &vlan_netdev_ops;
|
|
|
|
SET_NETDEV_DEVTYPE(dev, &vlan_type);
|
|
|
|
vlan_dev_set_lockdep_class(dev);
|
|
|
|
vlan->vlan_pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats);
|
|
if (!vlan->vlan_pcpu_stats)
|
|
return -ENOMEM;
|
|
|
|
/* Get vlan's reference to real_dev */
|
|
netdev_hold(real_dev, &vlan->dev_tracker, GFP_KERNEL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Note: this function might be called multiple times for the same device. */
|
|
void vlan_dev_free_egress_priority(const struct net_device *dev)
|
|
{
|
|
struct vlan_priority_tci_mapping *pm;
|
|
struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) {
|
|
while ((pm = vlan->egress_priority_map[i]) != NULL) {
|
|
vlan->egress_priority_map[i] = pm->next;
|
|
kfree(pm);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void vlan_dev_uninit(struct net_device *dev)
|
|
{
|
|
vlan_dev_free_egress_priority(dev);
|
|
}
|
|
|
|
static netdev_features_t vlan_dev_fix_features(struct net_device *dev,
|
|
netdev_features_t features)
|
|
{
|
|
struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
|
|
netdev_features_t old_features = features;
|
|
netdev_features_t lower_features;
|
|
|
|
lower_features = netdev_intersect_features((real_dev->vlan_features |
|
|
NETIF_F_RXCSUM),
|
|
real_dev->features);
|
|
|
|
/* Add HW_CSUM setting to preserve user ability to control
|
|
* checksum offload on the vlan device.
|
|
*/
|
|
if (lower_features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))
|
|
lower_features |= NETIF_F_HW_CSUM;
|
|
features = netdev_intersect_features(features, lower_features);
|
|
features |= old_features & (NETIF_F_SOFT_FEATURES | NETIF_F_GSO_SOFTWARE);
|
|
features |= NETIF_F_LLTX;
|
|
|
|
return features;
|
|
}
|
|
|
|
static int vlan_ethtool_get_link_ksettings(struct net_device *dev,
|
|
struct ethtool_link_ksettings *cmd)
|
|
{
|
|
const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
|
|
|
|
return __ethtool_get_link_ksettings(vlan->real_dev, cmd);
|
|
}
|
|
|
|
static void vlan_ethtool_get_drvinfo(struct net_device *dev,
|
|
struct ethtool_drvinfo *info)
|
|
{
|
|
strscpy(info->driver, vlan_fullname, sizeof(info->driver));
|
|
strscpy(info->version, vlan_version, sizeof(info->version));
|
|
strscpy(info->fw_version, "N/A", sizeof(info->fw_version));
|
|
}
|
|
|
|
static int vlan_ethtool_get_ts_info(struct net_device *dev,
|
|
struct ethtool_ts_info *info)
|
|
{
|
|
const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
|
|
const struct ethtool_ops *ops = vlan->real_dev->ethtool_ops;
|
|
struct phy_device *phydev = vlan->real_dev->phydev;
|
|
|
|
if (phy_has_tsinfo(phydev)) {
|
|
return phy_ts_info(phydev, info);
|
|
} else if (ops->get_ts_info) {
|
|
return ops->get_ts_info(vlan->real_dev, info);
|
|
} else {
|
|
info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE |
|
|
SOF_TIMESTAMPING_SOFTWARE;
|
|
info->phc_index = -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void vlan_dev_get_stats64(struct net_device *dev,
|
|
struct rtnl_link_stats64 *stats)
|
|
{
|
|
struct vlan_pcpu_stats *p;
|
|
u32 rx_errors = 0, tx_dropped = 0;
|
|
int i;
|
|
|
|
for_each_possible_cpu(i) {
|
|
u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes;
|
|
unsigned int start;
|
|
|
|
p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i);
|
|
do {
|
|
start = u64_stats_fetch_begin(&p->syncp);
|
|
rxpackets = u64_stats_read(&p->rx_packets);
|
|
rxbytes = u64_stats_read(&p->rx_bytes);
|
|
rxmulticast = u64_stats_read(&p->rx_multicast);
|
|
txpackets = u64_stats_read(&p->tx_packets);
|
|
txbytes = u64_stats_read(&p->tx_bytes);
|
|
} while (u64_stats_fetch_retry(&p->syncp, start));
|
|
|
|
stats->rx_packets += rxpackets;
|
|
stats->rx_bytes += rxbytes;
|
|
stats->multicast += rxmulticast;
|
|
stats->tx_packets += txpackets;
|
|
stats->tx_bytes += txbytes;
|
|
/* rx_errors & tx_dropped are u32 */
|
|
rx_errors += READ_ONCE(p->rx_errors);
|
|
tx_dropped += READ_ONCE(p->tx_dropped);
|
|
}
|
|
stats->rx_errors = rx_errors;
|
|
stats->tx_dropped = tx_dropped;
|
|
}
|
|
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
static void vlan_dev_poll_controller(struct net_device *dev)
|
|
{
|
|
return;
|
|
}
|
|
|
|
static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo)
|
|
{
|
|
struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
|
|
struct net_device *real_dev = vlan->real_dev;
|
|
struct netpoll *netpoll;
|
|
int err = 0;
|
|
|
|
netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
|
|
err = -ENOMEM;
|
|
if (!netpoll)
|
|
goto out;
|
|
|
|
err = __netpoll_setup(netpoll, real_dev);
|
|
if (err) {
|
|
kfree(netpoll);
|
|
goto out;
|
|
}
|
|
|
|
vlan->netpoll = netpoll;
|
|
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static void vlan_dev_netpoll_cleanup(struct net_device *dev)
|
|
{
|
|
struct vlan_dev_priv *vlan= vlan_dev_priv(dev);
|
|
struct netpoll *netpoll = vlan->netpoll;
|
|
|
|
if (!netpoll)
|
|
return;
|
|
|
|
vlan->netpoll = NULL;
|
|
__netpoll_free(netpoll);
|
|
}
|
|
#endif /* CONFIG_NET_POLL_CONTROLLER */
|
|
|
|
static int vlan_dev_get_iflink(const struct net_device *dev)
|
|
{
|
|
struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
|
|
|
|
return real_dev->ifindex;
|
|
}
|
|
|
|
static int vlan_dev_fill_forward_path(struct net_device_path_ctx *ctx,
|
|
struct net_device_path *path)
|
|
{
|
|
struct vlan_dev_priv *vlan = vlan_dev_priv(ctx->dev);
|
|
|
|
path->type = DEV_PATH_VLAN;
|
|
path->encap.id = vlan->vlan_id;
|
|
path->encap.proto = vlan->vlan_proto;
|
|
path->dev = ctx->dev;
|
|
ctx->dev = vlan->real_dev;
|
|
if (ctx->num_vlans >= ARRAY_SIZE(ctx->vlan))
|
|
return -ENOSPC;
|
|
|
|
ctx->vlan[ctx->num_vlans].id = vlan->vlan_id;
|
|
ctx->vlan[ctx->num_vlans].proto = vlan->vlan_proto;
|
|
ctx->num_vlans++;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_MACSEC)
|
|
|
|
static const struct macsec_ops *vlan_get_macsec_ops(const struct macsec_context *ctx)
|
|
{
|
|
return vlan_dev_priv(ctx->netdev)->real_dev->macsec_ops;
|
|
}
|
|
|
|
static int vlan_macsec_offload(int (* const func)(struct macsec_context *),
|
|
struct macsec_context *ctx)
|
|
{
|
|
if (unlikely(!func))
|
|
return 0;
|
|
|
|
return (*func)(ctx);
|
|
}
|
|
|
|
static int vlan_macsec_dev_open(struct macsec_context *ctx)
|
|
{
|
|
const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
|
|
|
|
if (!ops)
|
|
return -EOPNOTSUPP;
|
|
|
|
return vlan_macsec_offload(ops->mdo_dev_open, ctx);
|
|
}
|
|
|
|
static int vlan_macsec_dev_stop(struct macsec_context *ctx)
|
|
{
|
|
const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
|
|
|
|
if (!ops)
|
|
return -EOPNOTSUPP;
|
|
|
|
return vlan_macsec_offload(ops->mdo_dev_stop, ctx);
|
|
}
|
|
|
|
static int vlan_macsec_add_secy(struct macsec_context *ctx)
|
|
{
|
|
const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
|
|
|
|
if (!ops)
|
|
return -EOPNOTSUPP;
|
|
|
|
return vlan_macsec_offload(ops->mdo_add_secy, ctx);
|
|
}
|
|
|
|
static int vlan_macsec_upd_secy(struct macsec_context *ctx)
|
|
{
|
|
const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
|
|
|
|
if (!ops)
|
|
return -EOPNOTSUPP;
|
|
|
|
return vlan_macsec_offload(ops->mdo_upd_secy, ctx);
|
|
}
|
|
|
|
static int vlan_macsec_del_secy(struct macsec_context *ctx)
|
|
{
|
|
const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
|
|
|
|
if (!ops)
|
|
return -EOPNOTSUPP;
|
|
|
|
return vlan_macsec_offload(ops->mdo_del_secy, ctx);
|
|
}
|
|
|
|
static int vlan_macsec_add_rxsc(struct macsec_context *ctx)
|
|
{
|
|
const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
|
|
|
|
if (!ops)
|
|
return -EOPNOTSUPP;
|
|
|
|
return vlan_macsec_offload(ops->mdo_add_rxsc, ctx);
|
|
}
|
|
|
|
static int vlan_macsec_upd_rxsc(struct macsec_context *ctx)
|
|
{
|
|
const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
|
|
|
|
if (!ops)
|
|
return -EOPNOTSUPP;
|
|
|
|
return vlan_macsec_offload(ops->mdo_upd_rxsc, ctx);
|
|
}
|
|
|
|
static int vlan_macsec_del_rxsc(struct macsec_context *ctx)
|
|
{
|
|
const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
|
|
|
|
if (!ops)
|
|
return -EOPNOTSUPP;
|
|
|
|
return vlan_macsec_offload(ops->mdo_del_rxsc, ctx);
|
|
}
|
|
|
|
static int vlan_macsec_add_rxsa(struct macsec_context *ctx)
|
|
{
|
|
const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
|
|
|
|
if (!ops)
|
|
return -EOPNOTSUPP;
|
|
|
|
return vlan_macsec_offload(ops->mdo_add_rxsa, ctx);
|
|
}
|
|
|
|
static int vlan_macsec_upd_rxsa(struct macsec_context *ctx)
|
|
{
|
|
const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
|
|
|
|
if (!ops)
|
|
return -EOPNOTSUPP;
|
|
|
|
return vlan_macsec_offload(ops->mdo_upd_rxsa, ctx);
|
|
}
|
|
|
|
static int vlan_macsec_del_rxsa(struct macsec_context *ctx)
|
|
{
|
|
const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
|
|
|
|
if (!ops)
|
|
return -EOPNOTSUPP;
|
|
|
|
return vlan_macsec_offload(ops->mdo_del_rxsa, ctx);
|
|
}
|
|
|
|
static int vlan_macsec_add_txsa(struct macsec_context *ctx)
|
|
{
|
|
const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
|
|
|
|
if (!ops)
|
|
return -EOPNOTSUPP;
|
|
|
|
return vlan_macsec_offload(ops->mdo_add_txsa, ctx);
|
|
}
|
|
|
|
static int vlan_macsec_upd_txsa(struct macsec_context *ctx)
|
|
{
|
|
const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
|
|
|
|
if (!ops)
|
|
return -EOPNOTSUPP;
|
|
|
|
return vlan_macsec_offload(ops->mdo_upd_txsa, ctx);
|
|
}
|
|
|
|
static int vlan_macsec_del_txsa(struct macsec_context *ctx)
|
|
{
|
|
const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
|
|
|
|
if (!ops)
|
|
return -EOPNOTSUPP;
|
|
|
|
return vlan_macsec_offload(ops->mdo_del_txsa, ctx);
|
|
}
|
|
|
|
static int vlan_macsec_get_dev_stats(struct macsec_context *ctx)
|
|
{
|
|
const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
|
|
|
|
if (!ops)
|
|
return -EOPNOTSUPP;
|
|
|
|
return vlan_macsec_offload(ops->mdo_get_dev_stats, ctx);
|
|
}
|
|
|
|
static int vlan_macsec_get_tx_sc_stats(struct macsec_context *ctx)
|
|
{
|
|
const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
|
|
|
|
if (!ops)
|
|
return -EOPNOTSUPP;
|
|
|
|
return vlan_macsec_offload(ops->mdo_get_tx_sc_stats, ctx);
|
|
}
|
|
|
|
static int vlan_macsec_get_tx_sa_stats(struct macsec_context *ctx)
|
|
{
|
|
const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
|
|
|
|
if (!ops)
|
|
return -EOPNOTSUPP;
|
|
|
|
return vlan_macsec_offload(ops->mdo_get_tx_sa_stats, ctx);
|
|
}
|
|
|
|
static int vlan_macsec_get_rx_sc_stats(struct macsec_context *ctx)
|
|
{
|
|
const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
|
|
|
|
if (!ops)
|
|
return -EOPNOTSUPP;
|
|
|
|
return vlan_macsec_offload(ops->mdo_get_rx_sc_stats, ctx);
|
|
}
|
|
|
|
static int vlan_macsec_get_rx_sa_stats(struct macsec_context *ctx)
|
|
{
|
|
const struct macsec_ops *ops = vlan_get_macsec_ops(ctx);
|
|
|
|
if (!ops)
|
|
return -EOPNOTSUPP;
|
|
|
|
return vlan_macsec_offload(ops->mdo_get_rx_sa_stats, ctx);
|
|
}
|
|
|
|
static const struct macsec_ops macsec_offload_ops = {
|
|
/* Device wide */
|
|
.mdo_dev_open = vlan_macsec_dev_open,
|
|
.mdo_dev_stop = vlan_macsec_dev_stop,
|
|
/* SecY */
|
|
.mdo_add_secy = vlan_macsec_add_secy,
|
|
.mdo_upd_secy = vlan_macsec_upd_secy,
|
|
.mdo_del_secy = vlan_macsec_del_secy,
|
|
/* Security channels */
|
|
.mdo_add_rxsc = vlan_macsec_add_rxsc,
|
|
.mdo_upd_rxsc = vlan_macsec_upd_rxsc,
|
|
.mdo_del_rxsc = vlan_macsec_del_rxsc,
|
|
/* Security associations */
|
|
.mdo_add_rxsa = vlan_macsec_add_rxsa,
|
|
.mdo_upd_rxsa = vlan_macsec_upd_rxsa,
|
|
.mdo_del_rxsa = vlan_macsec_del_rxsa,
|
|
.mdo_add_txsa = vlan_macsec_add_txsa,
|
|
.mdo_upd_txsa = vlan_macsec_upd_txsa,
|
|
.mdo_del_txsa = vlan_macsec_del_txsa,
|
|
/* Statistics */
|
|
.mdo_get_dev_stats = vlan_macsec_get_dev_stats,
|
|
.mdo_get_tx_sc_stats = vlan_macsec_get_tx_sc_stats,
|
|
.mdo_get_tx_sa_stats = vlan_macsec_get_tx_sa_stats,
|
|
.mdo_get_rx_sc_stats = vlan_macsec_get_rx_sc_stats,
|
|
.mdo_get_rx_sa_stats = vlan_macsec_get_rx_sa_stats,
|
|
};
|
|
|
|
#endif
|
|
|
|
static const struct ethtool_ops vlan_ethtool_ops = {
|
|
.get_link_ksettings = vlan_ethtool_get_link_ksettings,
|
|
.get_drvinfo = vlan_ethtool_get_drvinfo,
|
|
.get_link = ethtool_op_get_link,
|
|
.get_ts_info = vlan_ethtool_get_ts_info,
|
|
};
|
|
|
|
static const struct net_device_ops vlan_netdev_ops = {
|
|
.ndo_change_mtu = vlan_dev_change_mtu,
|
|
.ndo_init = vlan_dev_init,
|
|
.ndo_uninit = vlan_dev_uninit,
|
|
.ndo_open = vlan_dev_open,
|
|
.ndo_stop = vlan_dev_stop,
|
|
.ndo_start_xmit = vlan_dev_hard_start_xmit,
|
|
.ndo_validate_addr = eth_validate_addr,
|
|
.ndo_set_mac_address = vlan_dev_set_mac_address,
|
|
.ndo_set_rx_mode = vlan_dev_set_rx_mode,
|
|
.ndo_change_rx_flags = vlan_dev_change_rx_flags,
|
|
.ndo_eth_ioctl = vlan_dev_ioctl,
|
|
.ndo_neigh_setup = vlan_dev_neigh_setup,
|
|
.ndo_get_stats64 = vlan_dev_get_stats64,
|
|
#if IS_ENABLED(CONFIG_FCOE)
|
|
.ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup,
|
|
.ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done,
|
|
.ndo_fcoe_enable = vlan_dev_fcoe_enable,
|
|
.ndo_fcoe_disable = vlan_dev_fcoe_disable,
|
|
.ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target,
|
|
#endif
|
|
#ifdef NETDEV_FCOE_WWNN
|
|
.ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn,
|
|
#endif
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
.ndo_poll_controller = vlan_dev_poll_controller,
|
|
.ndo_netpoll_setup = vlan_dev_netpoll_setup,
|
|
.ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup,
|
|
#endif
|
|
.ndo_fix_features = vlan_dev_fix_features,
|
|
.ndo_get_iflink = vlan_dev_get_iflink,
|
|
.ndo_fill_forward_path = vlan_dev_fill_forward_path,
|
|
};
|
|
|
|
static void vlan_dev_free(struct net_device *dev)
|
|
{
|
|
struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
|
|
|
|
free_percpu(vlan->vlan_pcpu_stats);
|
|
vlan->vlan_pcpu_stats = NULL;
|
|
|
|
/* Get rid of the vlan's reference to real_dev */
|
|
netdev_put(vlan->real_dev, &vlan->dev_tracker);
|
|
}
|
|
|
|
void vlan_setup(struct net_device *dev)
|
|
{
|
|
ether_setup(dev);
|
|
|
|
dev->priv_flags |= IFF_802_1Q_VLAN | IFF_NO_QUEUE;
|
|
dev->priv_flags |= IFF_UNICAST_FLT;
|
|
dev->priv_flags &= ~IFF_TX_SKB_SHARING;
|
|
netif_keep_dst(dev);
|
|
|
|
dev->netdev_ops = &vlan_netdev_ops;
|
|
dev->needs_free_netdev = true;
|
|
dev->priv_destructor = vlan_dev_free;
|
|
dev->ethtool_ops = &vlan_ethtool_ops;
|
|
|
|
#if IS_ENABLED(CONFIG_MACSEC)
|
|
dev->macsec_ops = &macsec_offload_ops;
|
|
#endif
|
|
dev->min_mtu = 0;
|
|
dev->max_mtu = ETH_MAX_MTU;
|
|
|
|
eth_zero_addr(dev->broadcast);
|
|
}
|