![Pedro Garcia](/assets/img/avatar_default.png)
- Without the 8021q module loaded in the kernel, all 802.1p packets (VLAN 0 but QoS tagging) are silently discarded (as expected, as the protocol is not loaded). - Without this patch in 8021q module, these packets are forwarded to the module, but they are discarded also if VLAN 0 is not configured, which should not be the default behaviour, as VLAN 0 is not really a VLANed packet but a 802.1p packet. Defining VLAN 0 makes it almost impossible to communicate with mixed 802.1p and non 802.1p devices on the same network due to arp table issues. - Changed logic to skip vlan specific code in vlan_skb_recv if VLAN is 0 and we have not defined a VLAN with ID 0, but we accept the packet with the encapsulated proto and pass it later to netif_rx. - In the vlan device event handler, added some logic to add VLAN 0 to HW filter in devices that support it (this prevented any traffic in VLAN 0 to reach the stack in e1000e with HW filter under 2.6.35, and probably also with other HW filtered cards, so we fix it here). - In the vlan unregister logic, prevent the elimination of VLAN 0 in devices with HW filter. - The default behaviour is to ignore the VLAN 0 tagging and accept the packet as if it was not tagged, but we can still define a VLAN 0 if desired (so it is backwards compatible). Signed-off-by: Pedro Garcia <pedro.netdev@dondevamos.com> Signed-off-by: David S. Miller <davem@davemloft.net>
996 lines
28 KiB
C
996 lines
28 KiB
C
/* -*- 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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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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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/etherdevice.h>
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#include <linux/ethtool.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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/*
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* Rebuild the Ethernet MAC header. This is called after an ARP
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* (or in future other address resolution) has completed on this
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* sk_buff. We now let ARP fill in the other fields.
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*
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* This routine CANNOT use cached dst->neigh!
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* Really, it is used only when dst->neigh is wrong.
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*
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* TODO: This needs a checkup, I'm ignorant here. --BLG
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*/
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static int vlan_dev_rebuild_header(struct sk_buff *skb)
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{
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struct net_device *dev = skb->dev;
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struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
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switch (veth->h_vlan_encapsulated_proto) {
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#ifdef CONFIG_INET
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case htons(ETH_P_IP):
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/* TODO: Confirm this will work with VLAN headers... */
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return arp_find(veth->h_dest, skb);
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#endif
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default:
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pr_debug("%s: unable to resolve type %X addresses.\n",
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dev->name, ntohs(veth->h_vlan_encapsulated_proto));
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memcpy(veth->h_source, dev->dev_addr, ETH_ALEN);
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break;
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}
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return 0;
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}
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static inline struct sk_buff *vlan_check_reorder_header(struct sk_buff *skb)
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{
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if (vlan_dev_info(skb->dev)->flags & VLAN_FLAG_REORDER_HDR) {
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if (skb_cow(skb, skb_headroom(skb)) < 0)
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skb = NULL;
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if (skb) {
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/* Lifted from Gleb's VLAN code... */
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memmove(skb->data - ETH_HLEN,
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skb->data - VLAN_ETH_HLEN, 12);
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skb->mac_header += VLAN_HLEN;
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}
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}
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return skb;
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}
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static inline void vlan_set_encap_proto(struct sk_buff *skb,
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struct vlan_hdr *vhdr)
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{
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__be16 proto;
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unsigned char *rawp;
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/*
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* Was a VLAN packet, grab the encapsulated protocol, which the layer
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* three protocols care about.
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*/
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proto = vhdr->h_vlan_encapsulated_proto;
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if (ntohs(proto) >= 1536) {
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skb->protocol = proto;
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return;
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}
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rawp = skb->data;
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if (*(unsigned short *)rawp == 0xFFFF)
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/*
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* This is a magic hack to spot IPX packets. Older Novell
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* breaks the protocol design and runs IPX over 802.3 without
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* an 802.2 LLC layer. We look for FFFF which isn't a used
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* 802.2 SSAP/DSAP. This won't work for fault tolerant netware
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* but does for the rest.
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*/
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skb->protocol = htons(ETH_P_802_3);
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else
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/*
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* Real 802.2 LLC
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*/
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skb->protocol = htons(ETH_P_802_2);
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}
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/*
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* Determine the packet's protocol ID. The rule here is that we
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* assume 802.3 if the type field is short enough to be a length.
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* This is normal practice and works for any 'now in use' protocol.
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*
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* Also, at this point we assume that we ARE dealing exclusively with
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* VLAN packets, or packets that should be made into VLAN packets based
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* on a default VLAN ID.
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*
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* NOTE: Should be similar to ethernet/eth.c.
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*
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* SANITY NOTE: This method is called when a packet is moving up the stack
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* towards userland. To get here, it would have already passed
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* through the ethernet/eth.c eth_type_trans() method.
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* SANITY NOTE 2: We are referencing to the VLAN_HDR frields, which MAY be
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* stored UNALIGNED in the memory. RISC systems don't like
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* such cases very much...
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* SANITY NOTE 2a: According to Dave Miller & Alexey, it will always be
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* aligned, so there doesn't need to be any of the unaligned
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* stuff. It has been commented out now... --Ben
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*
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*/
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int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev,
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struct packet_type *ptype, struct net_device *orig_dev)
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{
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struct vlan_hdr *vhdr;
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struct vlan_rx_stats *rx_stats;
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struct net_device *vlan_dev;
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u16 vlan_id;
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u16 vlan_tci;
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skb = skb_share_check(skb, GFP_ATOMIC);
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if (skb == NULL)
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goto err_free;
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if (unlikely(!pskb_may_pull(skb, VLAN_HLEN)))
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goto err_free;
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vhdr = (struct vlan_hdr *)skb->data;
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vlan_tci = ntohs(vhdr->h_vlan_TCI);
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vlan_id = vlan_tci & VLAN_VID_MASK;
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rcu_read_lock();
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vlan_dev = __find_vlan_dev(dev, vlan_id);
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/* If the VLAN device is defined, we use it.
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* If not, and the VID is 0, it is a 802.1p packet (not
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* really a VLAN), so we will just netif_rx it later to the
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* original interface, but with the skb->proto set to the
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* wrapped proto: we do nothing here.
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*/
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if (!vlan_dev) {
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if (vlan_id) {
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pr_debug("%s: ERROR: No net_device for VID: %u on dev: %s\n",
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__func__, vlan_id, dev->name);
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goto err_unlock;
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}
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rx_stats = NULL;
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} else {
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skb->dev = vlan_dev;
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rx_stats = per_cpu_ptr(vlan_dev_info(skb->dev)->vlan_rx_stats,
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smp_processor_id());
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u64_stats_update_begin(&rx_stats->syncp);
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rx_stats->rx_packets++;
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rx_stats->rx_bytes += skb->len;
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skb->priority = vlan_get_ingress_priority(skb->dev, vlan_tci);
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pr_debug("%s: priority: %u for TCI: %hu\n",
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__func__, skb->priority, vlan_tci);
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switch (skb->pkt_type) {
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case PACKET_BROADCAST:
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/* Yeah, stats collect these together.. */
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/* stats->broadcast ++; // no such counter :-( */
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break;
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case PACKET_MULTICAST:
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rx_stats->rx_multicast++;
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break;
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case PACKET_OTHERHOST:
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/* Our lower layer thinks this is not local, let's make
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* sure.
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* This allows the VLAN to have a different MAC than the
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* underlying device, and still route correctly.
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*/
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if (!compare_ether_addr(eth_hdr(skb)->h_dest,
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skb->dev->dev_addr))
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skb->pkt_type = PACKET_HOST;
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break;
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default:
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break;
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}
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u64_stats_update_end(&rx_stats->syncp);
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}
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skb_pull_rcsum(skb, VLAN_HLEN);
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vlan_set_encap_proto(skb, vhdr);
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if (vlan_dev) {
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skb = vlan_check_reorder_header(skb);
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if (!skb) {
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rx_stats->rx_errors++;
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goto err_unlock;
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}
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}
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netif_rx(skb);
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rcu_read_unlock();
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return NET_RX_SUCCESS;
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err_unlock:
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rcu_read_unlock();
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err_free:
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kfree_skb(skb);
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return NET_RX_DROP;
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}
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static inline u16
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vlan_dev_get_egress_qos_mask(struct net_device *dev, struct sk_buff *skb)
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{
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struct vlan_priority_tci_mapping *mp;
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mp = vlan_dev_info(dev)->egress_priority_map[(skb->priority & 0xF)];
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while (mp) {
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if (mp->priority == skb->priority) {
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return mp->vlan_qos; /* This should already be shifted
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* to mask correctly with the
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* VLAN's TCI */
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}
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mp = mp->next;
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}
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return 0;
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}
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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_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 (WARN_ON(skb_headroom(skb) < dev->hard_header_len))
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return -ENOSPC;
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if (!(vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR)) {
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vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN);
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vlan_tci = vlan_dev_info(dev)->vlan_id;
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vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);
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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 = htons(ETH_P_8021Q);
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type = ETH_P_8021Q;
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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_dev_info(dev)->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 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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int i = skb_get_queue_mapping(skb);
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struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
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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 != htons(ETH_P_8021Q) ||
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vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR) {
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unsigned int orig_headroom = skb_headroom(skb);
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u16 vlan_tci;
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vlan_dev_info(dev)->cnt_encap_on_xmit++;
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vlan_tci = vlan_dev_info(dev)->vlan_id;
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vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);
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skb = __vlan_put_tag(skb, vlan_tci);
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if (!skb) {
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txq->tx_dropped++;
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return NETDEV_TX_OK;
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}
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if (orig_headroom < VLAN_HLEN)
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vlan_dev_info(dev)->cnt_inc_headroom_on_tx++;
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}
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skb_set_dev(skb, vlan_dev_info(dev)->real_dev);
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len = skb->len;
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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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txq->tx_packets++;
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txq->tx_bytes += len;
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} else
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txq->tx_dropped++;
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return ret;
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}
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static netdev_tx_t vlan_dev_hwaccel_hard_start_xmit(struct sk_buff *skb,
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struct net_device *dev)
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{
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int i = skb_get_queue_mapping(skb);
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struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
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u16 vlan_tci;
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unsigned int len;
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int ret;
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vlan_tci = vlan_dev_info(dev)->vlan_id;
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vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);
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skb = __vlan_hwaccel_put_tag(skb, vlan_tci);
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skb->dev = vlan_dev_info(dev)->real_dev;
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len = skb->len;
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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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txq->tx_packets++;
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txq->tx_bytes += len;
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} else
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txq->tx_dropped++;
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return ret;
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}
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static u16 vlan_dev_select_queue(struct net_device *dev, struct sk_buff *skb)
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{
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struct net_device *rdev = vlan_dev_info(dev)->real_dev;
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const struct net_device_ops *ops = rdev->netdev_ops;
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return ops->ndo_select_queue(rdev, skb);
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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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/* TODO: gotta make sure the underlying layer can handle it,
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* maybe an IFF_VLAN_CAPABLE flag for devices?
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*/
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if (vlan_dev_info(dev)->real_dev->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_info *vlan = vlan_dev_info(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_info *vlan = vlan_dev_info(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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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 include/linux/if_vlan.h file. */
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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_info *vlan = vlan_dev_info(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))
|
|
return -EINVAL;
|
|
|
|
vlan->flags = (old_flags & ~mask) | (flags & mask);
|
|
|
|
if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) {
|
|
if (vlan->flags & VLAN_FLAG_GVRP)
|
|
vlan_gvrp_request_join(dev);
|
|
else
|
|
vlan_gvrp_request_leave(dev);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void vlan_dev_get_realdev_name(const struct net_device *dev, char *result)
|
|
{
|
|
strncpy(result, vlan_dev_info(dev)->real_dev->name, 23);
|
|
}
|
|
|
|
static int vlan_dev_open(struct net_device *dev)
|
|
{
|
|
struct vlan_dev_info *vlan = vlan_dev_info(dev);
|
|
struct net_device *real_dev = vlan->real_dev;
|
|
int err;
|
|
|
|
if (!(real_dev->flags & IFF_UP) &&
|
|
!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
|
|
return -ENETDOWN;
|
|
|
|
if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) {
|
|
err = dev_uc_add(real_dev, dev->dev_addr);
|
|
if (err < 0)
|
|
goto out;
|
|
}
|
|
|
|
if (dev->flags & IFF_ALLMULTI) {
|
|
err = dev_set_allmulti(real_dev, 1);
|
|
if (err < 0)
|
|
goto del_unicast;
|
|
}
|
|
if (dev->flags & IFF_PROMISC) {
|
|
err = dev_set_promiscuity(real_dev, 1);
|
|
if (err < 0)
|
|
goto clear_allmulti;
|
|
}
|
|
|
|
memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN);
|
|
|
|
if (vlan->flags & VLAN_FLAG_GVRP)
|
|
vlan_gvrp_request_join(dev);
|
|
|
|
netif_carrier_on(dev);
|
|
return 0;
|
|
|
|
clear_allmulti:
|
|
if (dev->flags & IFF_ALLMULTI)
|
|
dev_set_allmulti(real_dev, -1);
|
|
del_unicast:
|
|
if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr))
|
|
dev_uc_del(real_dev, dev->dev_addr);
|
|
out:
|
|
netif_carrier_off(dev);
|
|
return err;
|
|
}
|
|
|
|
static int vlan_dev_stop(struct net_device *dev)
|
|
{
|
|
struct vlan_dev_info *vlan = vlan_dev_info(dev);
|
|
struct net_device *real_dev = vlan->real_dev;
|
|
|
|
if (vlan->flags & VLAN_FLAG_GVRP)
|
|
vlan_gvrp_request_leave(dev);
|
|
|
|
dev_mc_unsync(real_dev, dev);
|
|
dev_uc_unsync(real_dev, dev);
|
|
if (dev->flags & IFF_ALLMULTI)
|
|
dev_set_allmulti(real_dev, -1);
|
|
if (dev->flags & IFF_PROMISC)
|
|
dev_set_promiscuity(real_dev, -1);
|
|
|
|
if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr))
|
|
dev_uc_del(real_dev, dev->dev_addr);
|
|
|
|
netif_carrier_off(dev);
|
|
return 0;
|
|
}
|
|
|
|
static int vlan_dev_set_mac_address(struct net_device *dev, void *p)
|
|
{
|
|
struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
|
|
struct sockaddr *addr = p;
|
|
int err;
|
|
|
|
if (!is_valid_ether_addr(addr->sa_data))
|
|
return -EADDRNOTAVAIL;
|
|
|
|
if (!(dev->flags & IFF_UP))
|
|
goto out;
|
|
|
|
if (compare_ether_addr(addr->sa_data, real_dev->dev_addr)) {
|
|
err = dev_uc_add(real_dev, addr->sa_data);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr))
|
|
dev_uc_del(real_dev, dev->dev_addr);
|
|
|
|
out:
|
|
memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
|
|
return 0;
|
|
}
|
|
|
|
static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
|
|
{
|
|
struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
|
|
const struct net_device_ops *ops = real_dev->netdev_ops;
|
|
struct ifreq ifrr;
|
|
int err = -EOPNOTSUPP;
|
|
|
|
strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ);
|
|
ifrr.ifr_ifru = ifr->ifr_ifru;
|
|
|
|
switch (cmd) {
|
|
case SIOCGMIIPHY:
|
|
case SIOCGMIIREG:
|
|
case SIOCSMIIREG:
|
|
if (netif_device_present(real_dev) && ops->ndo_do_ioctl)
|
|
err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd);
|
|
break;
|
|
}
|
|
|
|
if (!err)
|
|
ifr->ifr_ifru = ifrr.ifr_ifru;
|
|
|
|
return err;
|
|
}
|
|
|
|
static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa)
|
|
{
|
|
struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
|
|
const struct net_device_ops *ops = real_dev->netdev_ops;
|
|
int err = 0;
|
|
|
|
if (netif_device_present(real_dev) && ops->ndo_neigh_setup)
|
|
err = ops->ndo_neigh_setup(real_dev, pa);
|
|
|
|
return err;
|
|
}
|
|
|
|
#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
|
|
static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid,
|
|
struct scatterlist *sgl, unsigned int sgc)
|
|
{
|
|
struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
|
|
const struct net_device_ops *ops = real_dev->netdev_ops;
|
|
int rc = 0;
|
|
|
|
if (ops->ndo_fcoe_ddp_setup)
|
|
rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid)
|
|
{
|
|
struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
|
|
const struct net_device_ops *ops = real_dev->netdev_ops;
|
|
int len = 0;
|
|
|
|
if (ops->ndo_fcoe_ddp_done)
|
|
len = ops->ndo_fcoe_ddp_done(real_dev, xid);
|
|
|
|
return len;
|
|
}
|
|
|
|
static int vlan_dev_fcoe_enable(struct net_device *dev)
|
|
{
|
|
struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
|
|
const struct net_device_ops *ops = real_dev->netdev_ops;
|
|
int rc = -EINVAL;
|
|
|
|
if (ops->ndo_fcoe_enable)
|
|
rc = ops->ndo_fcoe_enable(real_dev);
|
|
return rc;
|
|
}
|
|
|
|
static int vlan_dev_fcoe_disable(struct net_device *dev)
|
|
{
|
|
struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
|
|
const struct net_device_ops *ops = real_dev->netdev_ops;
|
|
int rc = -EINVAL;
|
|
|
|
if (ops->ndo_fcoe_disable)
|
|
rc = ops->ndo_fcoe_disable(real_dev);
|
|
return rc;
|
|
}
|
|
|
|
static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type)
|
|
{
|
|
struct net_device *real_dev = vlan_dev_info(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_info(dev)->real_dev;
|
|
|
|
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_info(vlan_dev)->real_dev, vlan_dev);
|
|
dev_uc_sync(vlan_dev_info(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 *_subclass)
|
|
{
|
|
lockdep_set_class_and_subclass(&txq->_xmit_lock,
|
|
&vlan_netdev_xmit_lock_key,
|
|
*(int *)_subclass);
|
|
}
|
|
|
|
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, &subclass);
|
|
}
|
|
|
|
static const struct header_ops vlan_header_ops = {
|
|
.create = vlan_dev_hard_header,
|
|
.rebuild = vlan_dev_rebuild_header,
|
|
.parse = eth_header_parse,
|
|
};
|
|
|
|
static const struct net_device_ops vlan_netdev_ops, vlan_netdev_accel_ops,
|
|
vlan_netdev_ops_sq, vlan_netdev_accel_ops_sq;
|
|
|
|
static int vlan_dev_init(struct net_device *dev)
|
|
{
|
|
struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
|
|
int subclass = 0;
|
|
|
|
netif_carrier_off(dev);
|
|
|
|
/* IFF_BROADCAST|IFF_MULTICAST; ??? */
|
|
dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI |
|
|
IFF_MASTER | IFF_SLAVE);
|
|
dev->iflink = real_dev->ifindex;
|
|
dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) |
|
|
(1<<__LINK_STATE_DORMANT))) |
|
|
(1<<__LINK_STATE_PRESENT);
|
|
|
|
dev->features |= real_dev->features & real_dev->vlan_features;
|
|
dev->gso_max_size = real_dev->gso_max_size;
|
|
|
|
/* ipv6 shared card related stuff */
|
|
dev->dev_id = real_dev->dev_id;
|
|
|
|
if (is_zero_ether_addr(dev->dev_addr))
|
|
memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len);
|
|
if (is_zero_ether_addr(dev->broadcast))
|
|
memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
|
|
|
|
#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
|
|
dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid;
|
|
#endif
|
|
|
|
if (real_dev->features & NETIF_F_HW_VLAN_TX) {
|
|
dev->header_ops = real_dev->header_ops;
|
|
dev->hard_header_len = real_dev->hard_header_len;
|
|
if (real_dev->netdev_ops->ndo_select_queue)
|
|
dev->netdev_ops = &vlan_netdev_accel_ops_sq;
|
|
else
|
|
dev->netdev_ops = &vlan_netdev_accel_ops;
|
|
} else {
|
|
dev->header_ops = &vlan_header_ops;
|
|
dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN;
|
|
if (real_dev->netdev_ops->ndo_select_queue)
|
|
dev->netdev_ops = &vlan_netdev_ops_sq;
|
|
else
|
|
dev->netdev_ops = &vlan_netdev_ops;
|
|
}
|
|
|
|
if (is_vlan_dev(real_dev))
|
|
subclass = 1;
|
|
|
|
vlan_dev_set_lockdep_class(dev, subclass);
|
|
|
|
vlan_dev_info(dev)->vlan_rx_stats = alloc_percpu(struct vlan_rx_stats);
|
|
if (!vlan_dev_info(dev)->vlan_rx_stats)
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void vlan_dev_uninit(struct net_device *dev)
|
|
{
|
|
struct vlan_priority_tci_mapping *pm;
|
|
struct vlan_dev_info *vlan = vlan_dev_info(dev);
|
|
int i;
|
|
|
|
free_percpu(vlan->vlan_rx_stats);
|
|
vlan->vlan_rx_stats = NULL;
|
|
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 int vlan_ethtool_get_settings(struct net_device *dev,
|
|
struct ethtool_cmd *cmd)
|
|
{
|
|
const struct vlan_dev_info *vlan = vlan_dev_info(dev);
|
|
return dev_ethtool_get_settings(vlan->real_dev, cmd);
|
|
}
|
|
|
|
static void vlan_ethtool_get_drvinfo(struct net_device *dev,
|
|
struct ethtool_drvinfo *info)
|
|
{
|
|
strcpy(info->driver, vlan_fullname);
|
|
strcpy(info->version, vlan_version);
|
|
strcpy(info->fw_version, "N/A");
|
|
}
|
|
|
|
static u32 vlan_ethtool_get_rx_csum(struct net_device *dev)
|
|
{
|
|
const struct vlan_dev_info *vlan = vlan_dev_info(dev);
|
|
return dev_ethtool_get_rx_csum(vlan->real_dev);
|
|
}
|
|
|
|
static u32 vlan_ethtool_get_flags(struct net_device *dev)
|
|
{
|
|
const struct vlan_dev_info *vlan = vlan_dev_info(dev);
|
|
return dev_ethtool_get_flags(vlan->real_dev);
|
|
}
|
|
|
|
static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
|
|
{
|
|
dev_txq_stats_fold(dev, stats);
|
|
|
|
if (vlan_dev_info(dev)->vlan_rx_stats) {
|
|
struct vlan_rx_stats *p, accum = {0};
|
|
int i;
|
|
|
|
for_each_possible_cpu(i) {
|
|
u64 rxpackets, rxbytes, rxmulticast;
|
|
unsigned int start;
|
|
|
|
p = per_cpu_ptr(vlan_dev_info(dev)->vlan_rx_stats, i);
|
|
do {
|
|
start = u64_stats_fetch_begin_bh(&p->syncp);
|
|
rxpackets = p->rx_packets;
|
|
rxbytes = p->rx_bytes;
|
|
rxmulticast = p->rx_multicast;
|
|
} while (u64_stats_fetch_retry_bh(&p->syncp, start));
|
|
accum.rx_packets += rxpackets;
|
|
accum.rx_bytes += rxbytes;
|
|
accum.rx_multicast += rxmulticast;
|
|
/* rx_errors is an ulong, not protected by syncp */
|
|
accum.rx_errors += p->rx_errors;
|
|
}
|
|
stats->rx_packets = accum.rx_packets;
|
|
stats->rx_bytes = accum.rx_bytes;
|
|
stats->rx_errors = accum.rx_errors;
|
|
stats->multicast = accum.rx_multicast;
|
|
}
|
|
return stats;
|
|
}
|
|
|
|
static int vlan_ethtool_set_tso(struct net_device *dev, u32 data)
|
|
{
|
|
if (data) {
|
|
struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
|
|
|
|
/* Underlying device must support TSO for VLAN-tagged packets
|
|
* and must have TSO enabled now.
|
|
*/
|
|
if (!(real_dev->vlan_features & NETIF_F_TSO))
|
|
return -EOPNOTSUPP;
|
|
if (!(real_dev->features & NETIF_F_TSO))
|
|
return -EINVAL;
|
|
dev->features |= NETIF_F_TSO;
|
|
} else {
|
|
dev->features &= ~NETIF_F_TSO;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static const struct ethtool_ops vlan_ethtool_ops = {
|
|
.get_settings = vlan_ethtool_get_settings,
|
|
.get_drvinfo = vlan_ethtool_get_drvinfo,
|
|
.get_link = ethtool_op_get_link,
|
|
.get_rx_csum = vlan_ethtool_get_rx_csum,
|
|
.get_flags = vlan_ethtool_get_flags,
|
|
.set_tso = vlan_ethtool_set_tso,
|
|
};
|
|
|
|
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_set_multicast_list = 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 defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
|
|
.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_get_wwn = vlan_dev_fcoe_get_wwn,
|
|
#endif
|
|
};
|
|
|
|
static const struct net_device_ops vlan_netdev_accel_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_hwaccel_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_set_multicast_list = 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 defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
|
|
.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_get_wwn = vlan_dev_fcoe_get_wwn,
|
|
#endif
|
|
};
|
|
|
|
static const struct net_device_ops vlan_netdev_ops_sq = {
|
|
.ndo_select_queue = vlan_dev_select_queue,
|
|
.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_set_multicast_list = 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 defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
|
|
.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_get_wwn = vlan_dev_fcoe_get_wwn,
|
|
#endif
|
|
};
|
|
|
|
static const struct net_device_ops vlan_netdev_accel_ops_sq = {
|
|
.ndo_select_queue = vlan_dev_select_queue,
|
|
.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_hwaccel_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_set_multicast_list = 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 defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
|
|
.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_get_wwn = vlan_dev_fcoe_get_wwn,
|
|
#endif
|
|
};
|
|
|
|
void vlan_setup(struct net_device *dev)
|
|
{
|
|
ether_setup(dev);
|
|
|
|
dev->priv_flags |= IFF_802_1Q_VLAN;
|
|
dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
|
|
dev->tx_queue_len = 0;
|
|
|
|
dev->netdev_ops = &vlan_netdev_ops;
|
|
dev->destructor = free_netdev;
|
|
dev->ethtool_ops = &vlan_ethtool_ops;
|
|
|
|
memset(dev->broadcast, 0, ETH_ALEN);
|
|
}
|