Replace struct tcpopt with a proxy toeopt struct in the TOE driver interface to

the TCP syncache. This returns struct tcpopt to being private within the TCP
implementation, thus allowing it to be modified without ABI concerns.

The patch breaks the ABI. Bump __FreeBSD_version to 800103 accordingly. The cxgb
driver is the only TOE consumer affected by this change, and needs to be
recompiled along with the kernel.

Suggested by:	rwatson
Reviewed by:	rwatson, kmacy
Approved by:	re (kensmith), kensmith (mentor temporarily unavailable)

1 files changed, 13 insertions, 0 deletions

diff --git a/sys/netinet/tcp_offload.h b/sys/netinet/tcp_offload.h
index d05ef46..48f35ff 100644
--- a/sys/netinet/tcp_offload.h
+++ b/sys/netinet/tcp_offload.h
@@ -184,6 +184,19 @@ struct toe_usrreqs {
 	void (*tu_syncache_event)(int event, void *toep);
 };
 
+/*
+ * Proxy for struct tcpopt between TOE drivers and TCP functions.
+ */
+struct toeopt {
+	u_int64_t	to_flags;	/* see tcpopt in tcp_var.h */
+	u_int16_t	to_mss;		/* maximum segment size */
+	u_int8_t	to_wscale;	/* window scaling */
+
+	u_int8_t	_pad1;		/* explicit pad for 64bit alignment */
+	u_int32_t	_pad2;		/* explicit pad for 64bit alignment */
+	u_int64_t	_pad3[4];	/* TBD */
+};
+
 #define	TOE_SC_ENTRY_PRESENT		1	/* 4-tuple already present */
 #define	TOE_SC_DROP			2	/* connection was timed out */