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authorPeter Oskolkov <posk@google.com>2018-08-03 02:34:38 +0300
committerDavid S. Miller <davem@davemloft.net>2018-08-06 03:16:46 +0300
commit385114dec8a49b5e5945e77ba7de6356106713f4 (patch)
tree997d369a85c5277bd7bbaf55f6c0b55756bd7f47 /net/core/skbuff.c
parent7969e5c40dfd04799d4341f1b7cd266b6e47f227 (diff)
downloadlinux-385114dec8a49b5e5945e77ba7de6356106713f4.tar.xz
net: modify skb_rbtree_purge to return the truesize of all purged skbs.
Tested: see the next patch is the series. Suggested-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Peter Oskolkov <posk@google.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/skbuff.c')
-rw-r--r--net/core/skbuff.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 51b0a9126e12..8d574a88125d 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -2858,23 +2858,27 @@ 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;
}
/**