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Commit 87169595 authored by Peter Oskolkov's avatar Peter Oskolkov Committed by Greg Kroah-Hartman
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net: modify skb_rbtree_purge to return the truesize of all purged skbs. 



Tested: see the next patch is the series.

Suggested-by: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarPeter Oskolkov <posk@google.com>
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Cc: Florian Westphal <fw@strlen.de>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
(cherry picked from commit 385114dec8a49b5e5945e77ba7de6356106713f4)
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent f5d17b55

include/linux/skbuff.h

+1 −1
Original line number Diff line number Diff line
@@ -2418,7 +2418,7 @@ static inline void __skb_queue_purge(struct sk_buff_head *list) 
		kfree_skb(skb);

}



void skb_rbtree_purge(struct rb_root *root);

unsigned int skb_rbtree_purge(struct rb_root *root);



void *netdev_alloc_frag(unsigned int fragsz);

net/core/skbuff.c

+5 −1
Original line number Diff line number Diff line
@@ -2425,23 +2425,27 @@ EXPORT_SYMBOL(skb_queue_purge); 
/**

 *	skb_rbtree_purge - empty a skb rbtree

 *	@root: root of the rbtree to empty

 *	Return value: the sum of truesizes of all purged skbs.

 *

 *	Delete all buffers on an &sk_buff rbtree. Each buffer is removed from

 *	the list and one reference dropped. This function does not take

 *	any lock. Synchronization should be handled by the caller (e.g., TCP

 *	out-of-order queue is protected by the socket lock).

 */

void skb_rbtree_purge(struct rb_root *root)

unsigned int skb_rbtree_purge(struct rb_root *root)

{

	struct rb_node *p = rb_first(root);

	unsigned int sum = 0;



	while (p) {

		struct sk_buff *skb = rb_entry(p, struct sk_buff, rbnode);



		p = rb_next(p);

		rb_erase(&skb->rbnode, root);

		sum += skb->truesize;

		kfree_skb(skb);

	}

	return sum;

}



/**