[PATCH v3 22/30] net: modify skb_rbtree_purge to return the truesize of all purged skbs.
From: Stephen Hemminger <stephen@networkplumber.org>
Date: 2018-09-13 20:09:31
Also in:
stable
Subsystem:
networking [general], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Peter Oskolkov <redacted> Tested: see the next patch is the series. Suggested-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Peter Oskolkov <redacted> Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net> (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 f4749678b7ee..9c8457375aee 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h@@ -2581,7 +2581,7 @@ 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 c7c5f05f2af1..8fd690def5c1 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c@@ -2842,23 +2842,27 @@ 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; } /**
--
2.18.0