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Message-Id: <1518430280-16671-11-git-send-email-jchapman@katalix.com>
Date: Mon, 12 Feb 2018 10:11:14 +0000
From: James Chapman <jchapman@...alix.com>
To: netdev@...r.kernel.org
Cc: kbuild-all@...org
Subject: [PATCH net-next v2 10/16] l2tp: add session_free callback
When a session refcount hits 0, the session is freed via
l2tp_session_free. Some pseudowires (ppp, eth) may have additional
resources to free when this happens. Add a session_free callback that
can be used by pseudowires to override the default kfree. The callback
is responsible for freeing the session.
---
net/l2tp/l2tp_core.c | 7 +++++--
net/l2tp/l2tp_core.h | 1 +
2 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/net/l2tp/l2tp_core.c b/net/l2tp/l2tp_core.c
index 869dec89ff0f..d6306ba2d78e 100644
--- a/net/l2tp/l2tp_core.c
+++ b/net/l2tp/l2tp_core.c
@@ -1662,12 +1662,15 @@ void l2tp_session_free(struct l2tp_session *session)
BUG_ON(refcount_read(&session->ref_count) != 0);
+ if (session->session_free)
+ session->session_free(session);
+ else
+ kfree(session);
+
if (tunnel) {
BUG_ON(tunnel->magic != L2TP_TUNNEL_MAGIC);
l2tp_tunnel_dec_refcount(tunnel);
}
-
- kfree(session);
}
EXPORT_SYMBOL_GPL(l2tp_session_free);
diff --git a/net/l2tp/l2tp_core.h b/net/l2tp/l2tp_core.h
index d28d91600ad5..094b2e0dbd75 100644
--- a/net/l2tp/l2tp_core.h
+++ b/net/l2tp/l2tp_core.h
@@ -126,6 +126,7 @@ struct l2tp_session {
int (*build_header)(struct l2tp_session *session, void *buf);
void (*recv_skb)(struct l2tp_session *session, struct sk_buff *skb, int data_len);
void (*session_close)(struct l2tp_session *session);
+ void (*session_free)(struct l2tp_session *session);
#if IS_ENABLED(CONFIG_L2TP_DEBUGFS)
void (*show)(struct seq_file *m, void *priv);
#endif
--
1.9.1
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