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Commit 1cd7884d authored by Willem de Bruijn's avatar Willem de Bruijn Committed by David S. Miller
Browse files

udp: expose inet cork to udp 



UDP segmentation offload needs access to inet_cork in the udp layer.
Pass the struct to ip(6)_make_skb instead of allocating it on the
stack in that function itself.

This patch is a noop otherwise.

Signed-off-by: default avatarWillem de Bruijn <willemb@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent a9537c93

include/net/ip.h

+1 −1
Original line number Diff line number Diff line
@@ -171,7 +171,7 @@ struct sk_buff *ip_make_skb(struct sock *sk, struct flowi4 *fl4, 
					int len, int odd, struct sk_buff *skb),

			    void *from, int length, int transhdrlen,

			    struct ipcm_cookie *ipc, struct rtable **rtp,

			    unsigned int flags);

			    struct inet_cork *cork, unsigned int flags);



static inline struct sk_buff *ip_finish_skb(struct sock *sk, struct flowi4 *fl4)

{

include/net/ipv6.h

+1 −0
Original line number Diff line number Diff line
@@ -950,6 +950,7 @@ struct sk_buff *ip6_make_skb(struct sock *sk, 
			     void *from, int length, int transhdrlen,

			     struct ipcm6_cookie *ipc6, struct flowi6 *fl6,

			     struct rt6_info *rt, unsigned int flags,

			     struct inet_cork_full *cork,

			     const struct sockcm_cookie *sockc);



static inline struct sk_buff *ip6_finish_skb(struct sock *sk)

net/ipv4/ip_output.c

+8 −9
Original line number Diff line number Diff line
@@ -1470,9 +1470,8 @@ struct sk_buff *ip_make_skb(struct sock *sk, 
					int len, int odd, struct sk_buff *skb),

			    void *from, int length, int transhdrlen,

			    struct ipcm_cookie *ipc, struct rtable **rtp,

			    unsigned int flags)

			    struct inet_cork *cork, unsigned int flags)

{

	struct inet_cork cork;

	struct sk_buff_head queue;

	int err;
@@ -1481,22 +1480,22 @@ struct sk_buff *ip_make_skb(struct sock *sk, 


	__skb_queue_head_init(&queue);



	cork.flags = 0;

	cork.addr = 0;

	cork.opt = NULL;

	err = ip_setup_cork(sk, &cork, ipc, rtp);

	cork->flags = 0;

	cork->addr = 0;

	cork->opt = NULL;

	err = ip_setup_cork(sk, cork, ipc, rtp);

	if (err)

		return ERR_PTR(err);



	err = __ip_append_data(sk, fl4, &queue, &cork,

	err = __ip_append_data(sk, fl4, &queue, cork,

			       &current->task_frag, getfrag,

			       from, length, transhdrlen, flags);

	if (err) {

		__ip_flush_pending_frames(sk, &queue, &cork);

		__ip_flush_pending_frames(sk, &queue, cork);

		return ERR_PTR(err);

	}



	return __ip_make_skb(sk, fl4, &queue, &cork);

	return __ip_make_skb(sk, fl4, &queue, cork);

}



/*

net/ipv4/udp.c

+3 −1
Original line number Diff line number Diff line
@@ -1030,9 +1030,11 @@ int udp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) 


	/* Lockless fast path for the non-corking case. */

	if (!corkreq) {

		struct inet_cork cork;



		skb = ip_make_skb(sk, fl4, getfrag, msg, ulen,

				  sizeof(struct udphdr), &ipc, &rt,

				  msg->msg_flags);

				  &cork, msg->msg_flags);

		err = PTR_ERR(skb);

		if (!IS_ERR_OR_NULL(skb))

			err = udp_send_skb(skb, fl4);

net/ipv6/ip6_output.c

+10 −10
Original line number Diff line number Diff line
@@ -1755,9 +1755,9 @@ struct sk_buff *ip6_make_skb(struct sock *sk, 
			     void *from, int length, int transhdrlen,

			     struct ipcm6_cookie *ipc6, struct flowi6 *fl6,

			     struct rt6_info *rt, unsigned int flags,

			     struct inet_cork_full *cork,

			     const struct sockcm_cookie *sockc)

{

	struct inet_cork_full cork;

	struct inet6_cork v6_cork;

	struct sk_buff_head queue;

	int exthdrlen = (ipc6->opt ? ipc6->opt->opt_flen : 0);
@@ -1768,27 +1768,27 @@ struct sk_buff *ip6_make_skb(struct sock *sk, 


	__skb_queue_head_init(&queue);



	cork.base.flags = 0;

	cork.base.addr = 0;

	cork.base.opt = NULL;

	cork.base.dst = NULL;

	cork->base.flags = 0;

	cork->base.addr = 0;

	cork->base.opt = NULL;

	cork->base.dst = NULL;

	v6_cork.opt = NULL;

	err = ip6_setup_cork(sk, &cork, &v6_cork, ipc6, rt, fl6);

	err = ip6_setup_cork(sk, cork, &v6_cork, ipc6, rt, fl6);

	if (err) {

		ip6_cork_release(&cork, &v6_cork);

		ip6_cork_release(cork, &v6_cork);

		return ERR_PTR(err);

	}

	if (ipc6->dontfrag < 0)

		ipc6->dontfrag = inet6_sk(sk)->dontfrag;



	err = __ip6_append_data(sk, fl6, &queue, &cork.base, &v6_cork,

	err = __ip6_append_data(sk, fl6, &queue, &cork->base, &v6_cork,

				&current->task_frag, getfrag, from,

				length + exthdrlen, transhdrlen + exthdrlen,

				flags, ipc6, sockc);

	if (err) {

		__ip6_flush_pending_frames(sk, &queue, &cork, &v6_cork);

		__ip6_flush_pending_frames(sk, &queue, cork, &v6_cork);

		return ERR_PTR(err);

	}



	return __ip6_make_skb(sk, &queue, &cork, &v6_cork);

	return __ip6_make_skb(sk, &queue, cork, &v6_cork);

}