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-rw-r--r--net/core/dev.c31
1 files changed, 1 insertions, 30 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index 171420e75b03..c87a2264a02b 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2352,7 +2352,6 @@ EXPORT_SYMBOL(skb_checksum_help);
2352 2352
2353__be16 skb_network_protocol(struct sk_buff *skb, int *depth) 2353__be16 skb_network_protocol(struct sk_buff *skb, int *depth)
2354{ 2354{
2355 unsigned int vlan_depth = skb->mac_len;
2356 __be16 type = skb->protocol; 2355 __be16 type = skb->protocol;
2357 2356
2358 /* Tunnel gso handlers can set protocol to ethernet. */ 2357 /* Tunnel gso handlers can set protocol to ethernet. */
@@ -2366,35 +2365,7 @@ __be16 skb_network_protocol(struct sk_buff *skb, int *depth)
2366 type = eth->h_proto; 2365 type = eth->h_proto;
2367 } 2366 }
2368 2367
2369 /* if skb->protocol is 802.1Q/AD then the header should already be 2368 return __vlan_get_protocol(skb, type, depth);
2370 * present at mac_len - VLAN_HLEN (if mac_len > 0), or at
2371 * ETH_HLEN otherwise
2372 */
2373 if (type == htons(ETH_P_8021Q) || type == htons(ETH_P_8021AD)) {
2374 if (vlan_depth) {
2375 if (WARN_ON(vlan_depth < VLAN_HLEN))
2376 return 0;
2377 vlan_depth -= VLAN_HLEN;
2378 } else {
2379 vlan_depth = ETH_HLEN;
2380 }
2381 do {
2382 struct vlan_hdr *vh;
2383
2384 if (unlikely(!pskb_may_pull(skb,
2385 vlan_depth + VLAN_HLEN)))
2386 return 0;
2387
2388 vh = (struct vlan_hdr *)(skb->data + vlan_depth);
2389 type = vh->h_vlan_encapsulated_proto;
2390 vlan_depth += VLAN_HLEN;
2391 } while (type == htons(ETH_P_8021Q) ||
2392 type == htons(ETH_P_8021AD));
2393 }
2394
2395 *depth = vlan_depth;
2396
2397 return type;
2398} 2369}
2399 2370
2400/** 2371/**