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Commit 8ca896cf authored by Vlad Yasevich's avatar Vlad Yasevich Committed by David S. Miller
Browse files

ipv6: Add new offload registration infrastructure. 



Create a new data structure for IPv6 protocols that holds GRO/GSO
callbacks and a new array to track the protocols that register GRO/GSO.

Signed-off-by: default avatarVlad Yasevich <vyasevic@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent de27d001

include/net/protocol.h

+4 −0
Original line number Diff line number Diff line
@@ -84,6 +84,7 @@ struct net_offload { 
	struct sk_buff	      **(*gro_receive)(struct sk_buff **head,

					       struct sk_buff *skb);

	int			(*gro_complete)(struct sk_buff *skb);

	unsigned int		flags;	/* Flags used by IPv6 for now */

};



/* This is used to register socket interfaces for IP protocols.  */
@@ -109,6 +110,7 @@ extern const struct net_offload __rcu *inet_offloads[MAX_INET_PROTOS]; 


#if IS_ENABLED(CONFIG_IPV6)

extern const struct inet6_protocol __rcu *inet6_protos[MAX_INET_PROTOS];

extern const struct net_offload __rcu *inet6_offloads[MAX_INET_PROTOS];

#endif



extern int	inet_add_protocol(const struct net_protocol *prot, unsigned char num);
@@ -121,6 +123,8 @@ extern void inet_unregister_protosw(struct inet_protosw *p); 
#if IS_ENABLED(CONFIG_IPV6)

extern int	inet6_add_protocol(const struct inet6_protocol *prot, unsigned char num);

extern int	inet6_del_protocol(const struct inet6_protocol *prot, unsigned char num);

extern int	inet6_add_offload(const struct net_offload *prot, unsigned char num);

extern int	inet6_del_offload(const struct net_offload *prot, unsigned char num);

extern int	inet6_register_protosw(struct inet_protosw *p);

extern void	inet6_unregister_protosw(struct inet_protosw *p);

#endif

net/ipv6/exthdrs.c

+8 −0
Original line number Diff line number Diff line
@@ -531,11 +531,19 @@ static const struct inet6_protocol rthdr_protocol = { 
	.flags		=	INET6_PROTO_NOPOLICY | INET6_PROTO_GSO_EXTHDR,

};



static const struct net_offload rthdr_offload = {

	.flags		=	INET6_PROTO_GSO_EXTHDR,

};



static const struct inet6_protocol destopt_protocol = {

	.handler	=	ipv6_destopt_rcv,

	.flags		=	INET6_PROTO_NOPOLICY | INET6_PROTO_GSO_EXTHDR,

};



static const struct net_offload dstopt_offload = {

	.flags		=	INET6_PROTO_GSO_EXTHDR,

};



static const struct inet6_protocol nodata_protocol = {

	.handler	=	dst_discard,

	.flags		=	INET6_PROTO_NOPOLICY,

net/ipv6/protocol.c

+21 −0
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ 
#include <net/protocol.h>



const struct inet6_protocol __rcu *inet6_protos[MAX_INET_PROTOS] __read_mostly;

const struct net_offload __rcu *inet6_offloads[MAX_INET_PROTOS] __read_mostly;



int inet6_add_protocol(const struct inet6_protocol *prot, unsigned char protocol)

{
@@ -34,6 +35,13 @@ int inet6_add_protocol(const struct inet6_protocol *prot, unsigned char protocol 
}

EXPORT_SYMBOL(inet6_add_protocol);



int inet6_add_offload(const struct net_offload *prot, unsigned char protocol)

{

	return !cmpxchg((const struct net_offload **)&inet6_offloads[protocol],

			NULL, prot) ? 0 : -1;

}

EXPORT_SYMBOL(inet6_add_offload);



/*

 *	Remove a protocol from the hash tables.

 */
@@ -50,3 +58,16 @@ int inet6_del_protocol(const struct inet6_protocol *prot, unsigned char protocol 
	return ret;

}

EXPORT_SYMBOL(inet6_del_protocol);



int inet6_del_offload(const struct net_offload *prot, unsigned char protocol)

{

	int ret;



	ret = (cmpxchg((const struct net_offload **)&inet6_offloads[protocol],

		       prot, NULL) == prot) ? 0 : -1;



	synchronize_net();



	return ret;

}

EXPORT_SYMBOL(inet6_del_offload);

net/ipv6/tcp_ipv6.c

+7 −0
Original line number Diff line number Diff line
@@ -2073,6 +2073,13 @@ static const struct inet6_protocol tcpv6_protocol = { 
	.flags		=	INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,

};



static const struct net_offload tcpv6_offload = {

	.gso_send_check	=	tcp_v6_gso_send_check,

	.gso_segment	=	tcp_tso_segment,

	.gro_receive	=	tcp6_gro_receive,

	.gro_complete	=	tcp6_gro_complete,

};



static struct inet_protosw tcpv6_protosw = {

	.type		=	SOCK_STREAM,

	.protocol	=	IPPROTO_TCP,

net/ipv6/udp.c

+5 −0
Original line number Diff line number Diff line
@@ -1443,6 +1443,11 @@ static const struct inet6_protocol udpv6_protocol = { 
	.flags		=	INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,

};



static const struct net_offload udpv6_offload = {

	.gso_send_check =	udp6_ufo_send_check,

	.gso_segment	=	udp6_ufo_fragment,

};



/* ------------------------------------------------------------------------ */

#ifdef CONFIG_PROC_FS