From mboxrd@z Thu Jan 1 00:00:00 1970 From: Florian Fainelli Subject: [PATCH stable 4.9 21/29] net: modify skb_rbtree_purge to return the truesize of all purged skbs. Date: Tue, 9 Oct 2018 15:49:16 -0700 Message-ID: <20181009224924.30151-22-f.fainelli@gmail.com> References: <20181009224924.30151-1-f.fainelli@gmail.com> Cc: davem@davemloft.net, gregkh@linuxfoundation.org, stable@vger.kernel.org, edumazet@google.com, sthemmin@microsoft.com, Peter Oskolkov , Florian Westphal To: netdev@vger.kernel.org Return-path: In-Reply-To: <20181009224924.30151-1-f.fainelli@gmail.com> Sender: stable-owner@vger.kernel.org List-Id: netdev.vger.kernel.org From: Peter Oskolkov Tested: see the next patch is the series. Suggested-by: Eric Dumazet Signed-off-by: Peter Oskolkov Signed-off-by: Eric Dumazet Cc: Florian Westphal Signed-off-by: David S. Miller (cherry picked from commit 385114dec8a49b5e5945e77ba7de6356106713f4) --- include/linux/skbuff.h | 2 +- net/core/skbuff.c | 6 +++++- 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index c7cca35fcf6d..724c6abdb9e6 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -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); diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 96a553da1518..4e545e4432eb 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -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; } /** -- 2.17.1