Commit a8305bff authored by David S. Miller's avatar David S. Miller
Browse files

net: Add and use skb_mark_not_on_list(). 



An SKB is not on a list if skb->next is NULL.

Codify this convention into a helper function and use it
where we are dequeueing an SKB and need to mark it as such.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 776f07ee

include/linux/skbuff.h

+5 −0
Original line number Diff line number Diff line
@@ -1339,6 +1339,11 @@ static inline void skb_zcopy_abort(struct sk_buff *skb) 
	}

}



static inline void skb_mark_not_on_list(struct sk_buff *skb)

{

	skb->next = NULL;

}



/**

 *	skb_queue_empty - check if a queue is empty

 *	@list: queue head

net/core/dev.c

+4 −4
Original line number Diff line number Diff line
@@ -3231,7 +3231,7 @@ struct sk_buff *dev_hard_start_xmit(struct sk_buff *first, struct net_device *de 
	while (skb) {

		struct sk_buff *next = skb->next;



		skb->next = NULL;

		skb_mark_not_on_list(skb);

		rc = xmit_one(skb, dev, txq, next != NULL);

		if (unlikely(!dev_xmit_complete(rc))) {

			skb->next = next;
@@ -3331,7 +3331,7 @@ struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *d 


	for (; skb != NULL; skb = next) {

		next = skb->next;

		skb->next = NULL;

		skb_mark_not_on_list(skb);



		/* in case skb wont be segmented, point to itself */

		skb->prev = skb;
@@ -5296,7 +5296,7 @@ static void __napi_gro_flush_chain(struct napi_struct *napi, u32 index, 
		if (flush_old && NAPI_GRO_CB(skb)->age == jiffies)

			return;

		list_del(&skb->list);

		skb->next = NULL;

		skb_mark_not_on_list(skb);

		napi_gro_complete(skb);

		napi->gro_hash[index].count--;

	}
@@ -5482,7 +5482,7 @@ static enum gro_result dev_gro_receive(struct napi_struct *napi, struct sk_buff 


	if (pp) {

		list_del(&pp->list);

		pp->next = NULL;

		skb_mark_not_on_list(pp);

		napi_gro_complete(pp);

		napi->gro_hash[hash].count--;

	}

net/core/sock.c

+1 −1
Original line number Diff line number Diff line
@@ -2332,7 +2332,7 @@ static void __release_sock(struct sock *sk) 
			next = skb->next;

			prefetch(next);

			WARN_ON_ONCE(skb_dst_is_noref(skb));

			skb->next = NULL;

			skb_mark_not_on_list(skb);

			sk_backlog_rcv(sk, skb);



			cond_resched();

net/ieee802154/6lowpan/reassembly.c

+1 −1
Original line number Diff line number Diff line
@@ -260,7 +260,7 @@ static int lowpan_frag_reasm(struct lowpan_frag_queue *fq, struct sk_buff *prev, 
	}

	sub_frag_mem_limit(fq->q.net, sum_truesize);



	head->next = NULL;

	skb_mark_not_on_list(head);

	head->dev = ldev;

	head->tstamp = fq->q.stamp;

net/ipv4/ip_fragment.c

+1 −1
Original line number Diff line number Diff line
@@ -623,7 +623,7 @@ static int ip_frag_reasm(struct ipq *qp, struct sk_buff *skb, 
	sub_frag_mem_limit(qp->q.net, head->truesize);



	*nextp = NULL;

	head->next = NULL;

	skb_mark_not_on_list(head);

	head->prev = NULL;

	head->dev = dev;

	head->tstamp = qp->q.stamp;

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