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From: Kip Macy <kmacy@FreeBSD.org>
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Subject: PERFORCE change 118926 for review
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http://perforce.freebsd.org/chv.cgi?CH=118926

Change 118926 by kmacy@kmacy_vt-x:opentoe_init on 2007/04/29 03:02:05

	TOE on linux appears to rely on having a backpointer from the skb to the socket
	- add a field to allow me to do the same on FreeBSD until I can find away around 
	this
	
	The fact of the matter is that, network offload, like graphics offload, 
	requires modifications to the layer interfaces - the current interfaces
	are not god-given and may need to be re-examined in the future.
	
	That said, I'm not going to advocate the skb style strategy of having pointers 
	to everything in the network stack "just in case".

Affected files ...

.. //depot/projects/opentoe/sys/sys/mbuf.h#7 edit

Differences ...

==== //depot/projects/opentoe/sys/sys/mbuf.h#7 (text+ko) ====

@@ -122,6 +122,7 @@
 	int		 csum_data;	/* data field used by csum routines */
 	u_int16_t	 tso_segsz;	/* TSO segment size */
 	u_int16_t	 ether_vtag;	/* Ethernet 802.1p+q vlan tag */
+	void *           priv;          /* opaque pointer for protocol offload support */
 	SLIST_HEAD(packet_tags, m_tag) tags; /* list of packet tags */
 };
 
@@ -196,7 +197,8 @@
 #define	M_VLANTAG	0x10000	/* ether_vtag is valid */
 #define	M_PROMISC	0x20000	/* packet was not for us */
 #define M_LRO           0x80000 /* large receive offload in use for packet */
-#define M_IOVEC        0x100000 /* mbuf immediate data area is used for cluster ptrs */
+#define M_IOVEC         0x100000 /* mbuf immediate data area is used for cluster ptrs */
+#define	M_TOE		0x200000 /* packet is handled by protocol offload */
 
 /*
  * External buffer types: identify ext_buf type.