From: David Miller <davem@davemloft.net>
To: phil@nwl.cc
Cc: eric.dumazet@gmail.com, johannes@sipsolutions.net,
sedat.dilek@gmail.com, sfr@canb.auug.org.au,
linux-next@vger.kernel.org, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org, hannes@stressinduktion.org,
linux-wireless@vger.kernel.org, linville@tuxdriver.com
Subject: Re: linux-next: Tree for Aug 7
Date: Wed, 07 Aug 2013 16:36:21 -0700 (PDT) [thread overview]
Message-ID: <20130807.163621.84433966934449459.davem@davemloft.net> (raw)
In-Reply-To: <20130807.162748.779496444843938176.davem@davemloft.net>
From: David Miller <davem@davemloft.net>
Date: Wed, 07 Aug 2013 16:27:48 -0700 (PDT)
> Look, I'm going to fix this myself, because I'm pretty tired of
> waiting for the obvious fix.
Someone please test this:
diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h
index c623861..afc02a6 100644
--- a/include/linux/etherdevice.h
+++ b/include/linux/etherdevice.h
@@ -29,6 +29,7 @@
#ifdef __KERNEL__
extern __be16 eth_type_trans(struct sk_buff *skb, struct net_device *dev);
+extern __be16 __eth_type_trans(struct sk_buff *skb, struct net_device *dev);
extern const struct header_ops eth_header_ops;
extern int eth_header(struct sk_buff *skb, struct net_device *dev,
diff --git a/net/ethernet/eth.c b/net/ethernet/eth.c
index be1f64d..35dc1be 100644
--- a/net/ethernet/eth.c
+++ b/net/ethernet/eth.c
@@ -146,6 +146,45 @@ int eth_rebuild_header(struct sk_buff *skb)
EXPORT_SYMBOL(eth_rebuild_header);
/**
+ * __eth_type_trans - only determine the packet's protocol ID.
+ * @skb: packet
+ * @dev: device
+ */
+__be16 __eth_type_trans(struct sk_buff *skb, struct net_device *dev)
+{
+ struct ethhdr *eth = (struct ethhdr *) skb->data;
+
+ /*
+ * Some variants of DSA tagging don't have an ethertype field
+ * at all, so we check here whether one of those tagging
+ * variants has been configured on the receiving interface,
+ * and if so, set skb->protocol without looking at the packet.
+ */
+ if (netdev_uses_dsa_tags(dev))
+ return htons(ETH_P_DSA);
+ if (netdev_uses_trailer_tags(dev))
+ return htons(ETH_P_TRAILER);
+
+ if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN)
+ return eth->h_proto;
+
+ /*
+ * 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.
+ */
+ if (skb->len >= 2 && *(unsigned short *)(skb->data) == 0xFFFF)
+ return htons(ETH_P_802_3);
+
+ /*
+ * Real 802.2 LLC
+ */
+ return htons(ETH_P_802_2);
+}
+EXPORT_SYMBOL(__eth_type_trans);
+
+/**
* eth_type_trans - determine the packet's protocol ID.
* @skb: received socket data
* @dev: receiving network device
@@ -184,33 +223,7 @@ __be16 eth_type_trans(struct sk_buff *skb, struct net_device *dev)
skb->pkt_type = PACKET_OTHERHOST;
}
- /*
- * Some variants of DSA tagging don't have an ethertype field
- * at all, so we check here whether one of those tagging
- * variants has been configured on the receiving interface,
- * and if so, set skb->protocol without looking at the packet.
- */
- if (netdev_uses_dsa_tags(dev))
- return htons(ETH_P_DSA);
- if (netdev_uses_trailer_tags(dev))
- return htons(ETH_P_TRAILER);
-
- if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN)
- return eth->h_proto;
-
- /*
- * 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.
- */
- if (skb->len >= 2 && *(unsigned short *)(skb->data) == 0xFFFF)
- return htons(ETH_P_802_3);
-
- /*
- * Real 802.2 LLC
- */
- return htons(ETH_P_802_2);
+ return __eth_type_trans(skb, dev);
}
EXPORT_SYMBOL(eth_type_trans);
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 0c0f6c9..ec8e1c3 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -2003,7 +2003,7 @@ static int tpacket_fill_skb(struct packet_sock *po, struct sk_buff *skb,
return err;
if (dev->type == ARPHRD_ETHER)
- skb->protocol = eth_type_trans(skb, dev);
+ skb->protocol = __eth_type_trans(skb, dev);
data += dev->hard_header_len;
to_write -= dev->hard_header_len;
@@ -2332,13 +2332,13 @@ static int packet_snd(struct socket *sock,
sock_tx_timestamp(sk, &skb_shinfo(skb)->tx_flags);
if (dev->type == ARPHRD_ETHER) {
- skb->protocol = eth_type_trans(skb, dev);
+ skb->protocol = __eth_type_trans(skb, dev);
if (skb->protocol == htons(ETH_P_8021Q))
reserve += VLAN_HLEN;
} else {
skb->protocol = proto;
- skb->dev = dev;
}
+ skb->dev = dev;
if (!gso_type && (len > dev->mtu + reserve + extra_len)) {
err = -EMSGSIZE;
next prev parent reply other threads:[~2013-08-07 23:36 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-07 5:54 linux-next: Tree for Aug 7 Stephen Rothwell
2013-08-07 8:29 ` Sedat Dilek
2013-08-07 15:59 ` Phil Sutter
2013-08-07 16:12 ` Johannes Berg
2013-08-07 16:17 ` Eric Dumazet
2013-08-07 16:22 ` Johannes Berg
2013-08-07 16:40 ` Eric Dumazet
2013-08-07 17:47 ` David Miller
2013-08-07 18:37 ` Phil Sutter
2013-08-07 23:27 ` David Miller
2013-08-07 23:36 ` David Miller [this message]
2013-08-08 0:02 ` Sedat Dilek
2013-08-08 0:09 ` David Miller
2013-08-08 0:13 ` David Miller
2013-08-08 0:06 ` Eric Dumazet
2013-08-09 13:58 ` Phil Sutter
-- strict thread matches above, loose matches on Subject: below --
2023-08-07 5:47 Stephen Rothwell
2020-08-07 6:41 Stephen Rothwell
2019-08-07 8:36 Stephen Rothwell
2019-08-08 5:13 ` Michael Ellerman
2019-08-08 15:54 ` Gustavo A. R. Silva
2018-08-07 11:37 Stephen Rothwell
2017-08-07 6:44 Stephen Rothwell
2015-08-07 8:50 Stephen Rothwell
2014-08-07 7:40 Stephen Rothwell
2012-08-07 4:30 Stephen Rothwell
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