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authorTom Parkin <tparkin@katalix.com>2013-03-19 06:11:19 +0000
committerDavid S. Miller <davem@davemloft.net>2013-03-20 12:10:39 -0400
commit48f72f92b31431c40279b0fba6c5588e07e67d95 (patch)
tree7a5aaf6723d503ae6ea56290b457f42c3ebd63e6 /net/l2tp
parent02d13ed5f94af38c37d1abd53462fe48d78bcc9d (diff)
downloadlinux-48f72f92b31431c40279b0fba6c5588e07e67d95.tar.gz
l2tp: add session reorder queue purge function to core
If an l2tp session is deleted, it is necessary to delete skbs in-flight on the session's reorder queue before taking it down. Rather than having each pseudowire implementation reaching into the l2tp_session struct to handle this itself, provide a function in l2tp_core to purge the session queue. Signed-off-by: Tom Parkin <tparkin@katalix.com> Signed-off-by: James Chapman <jchapman@katalix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/l2tp')
-rw-r--r--net/l2tp/l2tp_core.c17
-rw-r--r--net/l2tp/l2tp_core.h1
2 files changed, 18 insertions, 0 deletions
diff --git a/net/l2tp/l2tp_core.c b/net/l2tp/l2tp_core.c
index e841ef2a68a..69c316dd02d 100644
--- a/net/l2tp/l2tp_core.c
+++ b/net/l2tp/l2tp_core.c
@@ -829,6 +829,23 @@ discard:
}
EXPORT_SYMBOL(l2tp_recv_common);
+/* Drop skbs from the session's reorder_q
+ */
+int l2tp_session_queue_purge(struct l2tp_session *session)
+{
+ struct sk_buff *skb = NULL;
+ BUG_ON(!session);
+ BUG_ON(session->magic != L2TP_SESSION_MAGIC);
+ while ((skb = skb_dequeue(&session->reorder_q))) {
+ atomic_long_inc(&session->stats.rx_errors);
+ kfree_skb(skb);
+ if (session->deref)
+ (*session->deref)(session);
+ }
+ return 0;
+}
+EXPORT_SYMBOL_GPL(l2tp_session_queue_purge);
+
/* Internal UDP receive frame. Do the real work of receiving an L2TP data frame
* here. The skb is not on a list when we get here.
* Returns 0 if the packet was a data packet and was successfully passed on.
diff --git a/net/l2tp/l2tp_core.h b/net/l2tp/l2tp_core.h
index b0861f68a10..d40713d105f 100644
--- a/net/l2tp/l2tp_core.h
+++ b/net/l2tp/l2tp_core.h
@@ -246,6 +246,7 @@ extern struct l2tp_session *l2tp_session_create(int priv_size, struct l2tp_tunne
extern int l2tp_session_delete(struct l2tp_session *session);
extern void l2tp_session_free(struct l2tp_session *session);
extern void l2tp_recv_common(struct l2tp_session *session, struct sk_buff *skb, unsigned char *ptr, unsigned char *optr, u16 hdrflags, int length, int (*payload_hook)(struct sk_buff *skb));
+extern int l2tp_session_queue_purge(struct l2tp_session *session);
extern int l2tp_udp_encap_recv(struct sock *sk, struct sk_buff *skb);
extern int l2tp_xmit_skb(struct l2tp_session *session, struct sk_buff *skb, int hdr_len);