extern int __vlan_hwaccel_rx(struct sk_buff *skb, struct vlan_group *grp,
u16 vlan_tci, int polling);
-extern bool vlan_hwaccel_do_receive(struct sk_buff **skb);
+extern bool vlan_do_receive(struct sk_buff **skb);
+extern struct sk_buff *vlan_untag(struct sk_buff *skb);
extern gro_result_t
vlan_gro_receive(struct napi_struct *napi, struct vlan_group *grp,
unsigned int vlan_tci, struct sk_buff *skb);
return NET_XMIT_SUCCESS;
}
-static inline bool vlan_hwaccel_do_receive(struct sk_buff **skb)
+static inline bool vlan_do_receive(struct sk_buff **skb)
{
if ((*skb)->vlan_tci & VLAN_VID_MASK)
(*skb)->pkt_type = PACKET_OTHERHOST;
return false;
}
+inline struct sk_buff *vlan_untag(struct sk_buff *skb)
+{
+ return skb;
+}
+
static inline gro_result_t
vlan_gro_receive(struct napi_struct *napi, struct vlan_group *grp,
unsigned int vlan_tci, struct sk_buff *skb)
static const char vlan_copyright[] = "Ben Greear <greearb@candelatech.com>";
static const char vlan_buggyright[] = "David S. Miller <davem@redhat.com>";
-static struct packet_type vlan_packet_type __read_mostly = {
- .type = cpu_to_be16(ETH_P_8021Q),
- .func = vlan_skb_recv, /* VLAN receive method */
-};
-
/* End of global variables definitions. */
static void vlan_group_free(struct vlan_group *grp)
if (err < 0)
goto err4;
- dev_add_pack(&vlan_packet_type);
vlan_ioctl_set(vlan_ioctl_handler);
return 0;
unregister_netdevice_notifier(&vlan_notifier_block);
- dev_remove_pack(&vlan_packet_type);
-
unregister_pernet_subsys(&vlan_net_ops);
rcu_barrier(); /* Wait for completion of call_rcu()'s */
}
/* found in vlan_dev.c */
-int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev,
- struct packet_type *ptype, struct net_device *orig_dev);
void vlan_dev_set_ingress_priority(const struct net_device *dev,
u32 skb_prio, u16 vlan_prio);
int vlan_dev_set_egress_priority(const struct net_device *dev,
#include <linux/netpoll.h>
#include "vlan.h"
-bool vlan_hwaccel_do_receive(struct sk_buff **skbp)
+bool vlan_do_receive(struct sk_buff **skbp)
{
struct sk_buff *skb = *skbp;
u16 vlan_id = skb->vlan_tci & VLAN_VID_MASK;
return napi_gro_frags(napi);
}
EXPORT_SYMBOL(vlan_gro_frags);
+
+static struct sk_buff *vlan_check_reorder_header(struct sk_buff *skb)
+{
+ if (vlan_dev_info(skb->dev)->flags & VLAN_FLAG_REORDER_HDR) {
+ if (skb_cow(skb, skb_headroom(skb)) < 0)
+ skb = NULL;
+ if (skb) {
+ /* Lifted from Gleb's VLAN code... */
+ memmove(skb->data - ETH_HLEN,
+ skb->data - VLAN_ETH_HLEN, 12);
+ skb->mac_header += VLAN_HLEN;
+ }
+ }
+ return skb;
+}
+
+static void vlan_set_encap_proto(struct sk_buff *skb, struct vlan_hdr *vhdr)
+{
+ __be16 proto;
+ unsigned char *rawp;
+
+ /*
+ * Was a VLAN packet, grab the encapsulated protocol, which the layer
+ * three protocols care about.
+ */
+
+ proto = vhdr->h_vlan_encapsulated_proto;
+ if (ntohs(proto) >= 1536) {
+ skb->protocol = proto;
+ return;
+ }
+
+ rawp = skb->data;
+ if (*(unsigned short *) rawp == 0xFFFF)
+ /*
+ * This is a magic hack to spot IPX packets. Older Novell
+ * breaks the protocol design and runs IPX over 802.3 without
+ * an 802.2 LLC layer. We look for FFFF which isn't a used
+ * 802.2 SSAP/DSAP. This won't work for fault tolerant netware
+ * but does for the rest.
+ */
+ skb->protocol = htons(ETH_P_802_3);
+ else
+ /*
+ * Real 802.2 LLC
+ */
+ skb->protocol = htons(ETH_P_802_2);
+}
+
+struct sk_buff *vlan_untag(struct sk_buff *skb)
+{
+ struct vlan_hdr *vhdr;
+ u16 vlan_tci;
+
+ if (unlikely(vlan_tx_tag_present(skb))) {
+ /* vlan_tci is already set-up so leave this for another time */
+ return skb;
+ }
+
+ skb = skb_share_check(skb, GFP_ATOMIC);
+ if (unlikely(!skb))
+ goto err_free;
+
+ if (unlikely(!pskb_may_pull(skb, VLAN_HLEN)))
+ goto err_free;
+
+ vhdr = (struct vlan_hdr *) skb->data;
+ vlan_tci = ntohs(vhdr->h_vlan_TCI);
+ __vlan_hwaccel_put_tag(skb, vlan_tci);
+
+ skb_pull_rcsum(skb, VLAN_HLEN);
+ vlan_set_encap_proto(skb, vhdr);
+
+ skb = vlan_check_reorder_header(skb);
+ if (unlikely(!skb))
+ goto err_free;
+
+ return skb;
+
+err_free:
+ kfree_skb(skb);
+ return NULL;
+}
return 0;
}
-static inline struct sk_buff *vlan_check_reorder_header(struct sk_buff *skb)
-{
- if (vlan_dev_info(skb->dev)->flags & VLAN_FLAG_REORDER_HDR) {
- if (skb_cow(skb, skb_headroom(skb)) < 0)
- skb = NULL;
- if (skb) {
- /* Lifted from Gleb's VLAN code... */
- memmove(skb->data - ETH_HLEN,
- skb->data - VLAN_ETH_HLEN, 12);
- skb->mac_header += VLAN_HLEN;
- }
- }
-
- return skb;
-}
-
-static inline void vlan_set_encap_proto(struct sk_buff *skb,
- struct vlan_hdr *vhdr)
-{
- __be16 proto;
- unsigned char *rawp;
-
- /*
- * Was a VLAN packet, grab the encapsulated protocol, which the layer
- * three protocols care about.
- */
-
- proto = vhdr->h_vlan_encapsulated_proto;
- if (ntohs(proto) >= 1536) {
- skb->protocol = proto;
- return;
- }
-
- rawp = skb->data;
- if (*(unsigned short *)rawp == 0xFFFF)
- /*
- * This is a magic hack to spot IPX packets. Older Novell
- * breaks the protocol design and runs IPX over 802.3 without
- * an 802.2 LLC layer. We look for FFFF which isn't a used
- * 802.2 SSAP/DSAP. This won't work for fault tolerant netware
- * but does for the rest.
- */
- skb->protocol = htons(ETH_P_802_3);
- else
- /*
- * Real 802.2 LLC
- */
- skb->protocol = htons(ETH_P_802_2);
-}
-
-/*
- * Determine the packet's protocol ID. The rule here is that we
- * assume 802.3 if the type field is short enough to be a length.
- * This is normal practice and works for any 'now in use' protocol.
- *
- * Also, at this point we assume that we ARE dealing exclusively with
- * VLAN packets, or packets that should be made into VLAN packets based
- * on a default VLAN ID.
- *
- * NOTE: Should be similar to ethernet/eth.c.
- *
- * SANITY NOTE: This method is called when a packet is moving up the stack
- * towards userland. To get here, it would have already passed
- * through the ethernet/eth.c eth_type_trans() method.
- * SANITY NOTE 2: We are referencing to the VLAN_HDR frields, which MAY be
- * stored UNALIGNED in the memory. RISC systems don't like
- * such cases very much...
- * SANITY NOTE 2a: According to Dave Miller & Alexey, it will always be
- * aligned, so there doesn't need to be any of the unaligned
- * stuff. It has been commented out now... --Ben
- *
- */
-int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev,
- struct packet_type *ptype, struct net_device *orig_dev)
-{
- struct vlan_hdr *vhdr;
- struct vlan_pcpu_stats *rx_stats;
- struct net_device *vlan_dev;
- u16 vlan_id;
- u16 vlan_tci;
-
- skb = skb_share_check(skb, GFP_ATOMIC);
- if (skb == NULL)
- goto err_free;
-
- if (unlikely(!pskb_may_pull(skb, VLAN_HLEN)))
- goto err_free;
-
- vhdr = (struct vlan_hdr *)skb->data;
- vlan_tci = ntohs(vhdr->h_vlan_TCI);
- vlan_id = vlan_tci & VLAN_VID_MASK;
-
- rcu_read_lock();
- vlan_dev = vlan_find_dev(dev, vlan_id);
-
- /* If the VLAN device is defined, we use it.
- * If not, and the VID is 0, it is a 802.1p packet (not
- * really a VLAN), so we will just netif_rx it later to the
- * original interface, but with the skb->proto set to the
- * wrapped proto: we do nothing here.
- */
-
- if (!vlan_dev) {
- if (vlan_id) {
- pr_debug("%s: ERROR: No net_device for VID: %u on dev: %s\n",
- __func__, vlan_id, dev->name);
- goto err_unlock;
- }
- rx_stats = NULL;
- } else {
- skb->dev = vlan_dev;
-
- rx_stats = this_cpu_ptr(vlan_dev_info(skb->dev)->vlan_pcpu_stats);
-
- u64_stats_update_begin(&rx_stats->syncp);
- rx_stats->rx_packets++;
- rx_stats->rx_bytes += skb->len;
-
- skb->priority = vlan_get_ingress_priority(skb->dev, vlan_tci);
-
- pr_debug("%s: priority: %u for TCI: %hu\n",
- __func__, skb->priority, vlan_tci);
-
- switch (skb->pkt_type) {
- case PACKET_BROADCAST:
- /* Yeah, stats collect these together.. */
- /* stats->broadcast ++; // no such counter :-( */
- break;
-
- case PACKET_MULTICAST:
- rx_stats->rx_multicast++;
- break;
-
- case PACKET_OTHERHOST:
- /* Our lower layer thinks this is not local, let's make
- * sure.
- * This allows the VLAN to have a different MAC than the
- * underlying device, and still route correctly.
- */
- if (!compare_ether_addr(eth_hdr(skb)->h_dest,
- skb->dev->dev_addr))
- skb->pkt_type = PACKET_HOST;
- break;
- default:
- break;
- }
- u64_stats_update_end(&rx_stats->syncp);
- }
-
- skb_pull_rcsum(skb, VLAN_HLEN);
- vlan_set_encap_proto(skb, vhdr);
-
- if (vlan_dev) {
- skb = vlan_check_reorder_header(skb);
- if (!skb) {
- rx_stats->rx_errors++;
- goto err_unlock;
- }
- }
-
- netif_rx(skb);
-
- rcu_read_unlock();
- return NET_RX_SUCCESS;
-
-err_unlock:
- rcu_read_unlock();
-err_free:
- atomic_long_inc(&dev->rx_dropped);
- kfree_skb(skb);
- return NET_RX_DROP;
-}
-
static inline u16
vlan_dev_get_egress_qos_mask(struct net_device *dev, struct sk_buff *skb)
{
__this_cpu_inc(softnet_data.processed);
+ if (skb->protocol == cpu_to_be16(ETH_P_8021Q)) {
+ skb = vlan_untag(skb);
+ if (unlikely(!skb))
+ goto out;
+ }
+
#ifdef CONFIG_NET_CLS_ACT
if (skb->tc_verd & TC_NCLS) {
skb->tc_verd = CLR_TC_NCLS(skb->tc_verd);
ret = deliver_skb(skb, pt_prev, orig_dev);
pt_prev = NULL;
}
- if (vlan_hwaccel_do_receive(&skb)) {
+ if (vlan_do_receive(&skb)) {
ret = __netif_receive_skb(skb);
goto out;
} else if (unlikely(!skb))
git.samba.org / sfrench / cifs-2.6.git / commitdiff