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![Cong Wang](/assets/img/avatar_default.png)
The dynamic key update for addr_list_lock still causes troubles, for example the following race condition still exists: CPU 0: CPU 1: (RCU read lock) (RTNL lock) dev_mc_seq_show() netdev_update_lockdep_key() -> lockdep_unregister_key() -> netif_addr_lock_bh() because lockdep doesn't provide an API to update it atomically. Therefore, we have to move it back to static keys and use subclass for nest locking like before. In commit1a33e10e4a
("net: partially revert dynamic lockdep key changes"), I already reverted most parts of commitab92d68fc2
("net: core: add generic lockdep keys"). This patch reverts the rest and also part of commitf3b0a18bb6
("net: remove unnecessary variables and callback"). After this patch, addr_list_lock changes back to using static keys and subclasses to satisfy lockdep. Thanks to dev->lower_level, we do not have to change back to ->ndo_get_lock_subclass(). And hopefully this reduces some syzbot lockdep noises too. Reported-by: syzbot+f3a0e80c34b3fc28ac5e@syzkaller.appspotmail.com Cc: Taehee Yoo <ap420073@gmail.com> Cc: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
837 lines
22 KiB
C
837 lines
22 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 "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 (veth->h_vlan_proto != vlan->vlan_proto ||
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vlan->flags & VLAN_FLAG_REORDER_HDR) {
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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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stats->tx_packets++;
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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)
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{
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strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23);
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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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ether_addr_copy(dev->dev_addr, 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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ether_addr_copy(dev->dev_addr, 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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strncpy(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), &init_net))
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break;
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/* fall through */
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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_do_ioctl)
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err = ops->ndo_do_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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|
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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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|
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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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}
|
|
|
|
static int vlan_dev_fcoe_disable(struct net_device *dev)
|
|
{
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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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|
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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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|
{
|
|
struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
|
|
const struct net_device_ops *ops = real_dev->netdev_ops;
|
|
int rc = 0;
|
|
|
|
if (ops->ndo_fcoe_ddp_target)
|
|
rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc);
|
|
|
|
return rc;
|
|
}
|
|
#endif
|
|
|
|
#ifdef NETDEV_FCOE_WWNN
|
|
static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type)
|
|
{
|
|
struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
|
|
const struct net_device_ops *ops = real_dev->netdev_ops;
|
|
int rc = -EINVAL;
|
|
|
|
if (ops->ndo_fcoe_get_wwn)
|
|
rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type);
|
|
return rc;
|
|
}
|
|
#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, int subclass)
|
|
{
|
|
lockdep_set_class_and_subclass(&dev->addr_list_lock,
|
|
&vlan_netdev_addr_lock_key,
|
|
subclass);
|
|
netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, NULL);
|
|
}
|
|
|
|
static const struct header_ops vlan_header_ops = {
|
|
.create = vlan_dev_hard_header,
|
|
.parse = eth_header_parse,
|
|
};
|
|
|
|
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,
|
|
};
|
|
|
|
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;
|
|
|
|
dev->features |= dev->hw_features | NETIF_F_LLTX;
|
|
dev->gso_max_size = real_dev->gso_max_size;
|
|
dev->gso_max_segs = real_dev->gso_max_segs;
|
|
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)) {
|
|
ether_addr_copy(dev->dev_addr, 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, dev->lower_level);
|
|
|
|
vlan->vlan_pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats);
|
|
if (!vlan->vlan_pcpu_stats)
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Note: this function might be called multiple times for the same device. */
|
|
void vlan_dev_uninit(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 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)
|
|
{
|
|
strlcpy(info->driver, vlan_fullname, sizeof(info->driver));
|
|
strlcpy(info->version, vlan_version, sizeof(info->version));
|
|
strlcpy(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_irq(&p->syncp);
|
|
rxpackets = p->rx_packets;
|
|
rxbytes = p->rx_bytes;
|
|
rxmulticast = p->rx_multicast;
|
|
txpackets = p->tx_packets;
|
|
txbytes = p->tx_bytes;
|
|
} while (u64_stats_fetch_retry_irq(&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 += p->rx_errors;
|
|
tx_dropped += 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 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_do_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,
|
|
};
|
|
|
|
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;
|
|
}
|
|
|
|
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;
|
|
|
|
dev->min_mtu = 0;
|
|
dev->max_mtu = ETH_MAX_MTU;
|
|
|
|
eth_zero_addr(dev->broadcast);
|
|
}
|