From 94352d45092c23874532221b4d1e4721df9d63df Mon Sep 17 00:00:00 2001
From: Arnaldo Carvalho de Melo <acme@redhat.com>
Date: Wed, 1 Mar 2017 16:35:08 -0300
Subject: [PATCH] net: Introduce sk_clone_lock() error path routine
When handling problems in cloning a socket with the sk_clone_locked()
function we need to perform several steps that were open coded in it and
its callers, so introduce a routine to avoid this duplication:
sk_free_unlock_clone().
Cc: Cong Wang <xiyou.wangcong@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/n/net-ui6laqkotycunhtmqryl9bfx@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
include/net/sock.h | 1 +
net/core/sock.c | 16 +++++++++++-----
net/dccp/minisocks.c | 6 +-----
3 files changed, 13 insertions(+), 10 deletions(-)
diff --git a/include/net/sock.h b/include/net/sock.h
index 9ccefa5c54878..5e5997654db64 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -1526,6 +1526,7 @@ struct sock *sk_alloc(struct net *net, int family, gfp_t priority,
void sk_free(struct sock *sk);
void sk_destruct(struct sock *sk);
struct sock *sk_clone_lock(const struct sock *sk, const gfp_t priority);
+void sk_free_unlock_clone(struct sock *sk);
struct sk_buff *sock_wmalloc(struct sock *sk, unsigned long size, int force,
gfp_t priority);
diff --git a/net/core/sock.c b/net/core/sock.c
index e7d74940e8637..f6fd79f33097f 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1539,11 +1539,7 @@ struct sock *sk_clone_lock(const struct sock *sk, const gfp_t priority)
is_charged = sk_filter_charge(newsk, filter);
if (unlikely(!is_charged || xfrm_sk_clone_policy(newsk, sk))) {
- /* It is still raw copy of parent, so invalidate
- * destructor and make plain sk_free() */
- newsk->sk_destruct = NULL;
- bh_unlock_sock(newsk);
- sk_free(newsk);
+ sk_free_unlock_clone(newsk);
newsk = NULL;
goto out;
}
@@ -1592,6 +1588,16 @@ struct sock *sk_clone_lock(const struct sock *sk, const gfp_t priority)
}
EXPORT_SYMBOL_GPL(sk_clone_lock);
+void sk_free_unlock_clone(struct sock *sk)
+{
+ /* It is still raw copy of parent, so invalidate
+ * destructor and make plain sk_free() */
+ sk->sk_destruct = NULL;
+ bh_unlock_sock(sk);
+ sk_free(sk);
+}
+EXPORT_SYMBOL_GPL(sk_free_unlock_clone);
+
void sk_setup_caps(struct sock *sk, struct dst_entry *dst)
{
u32 max_segs = 1;
diff --git a/net/dccp/minisocks.c b/net/dccp/minisocks.c
index d20d948a98ed3..e267e6f4c9a55 100644
--- a/net/dccp/minisocks.c
+++ b/net/dccp/minisocks.c
@@ -119,11 +119,7 @@ struct sock *dccp_create_openreq_child(const struct sock *sk,
* Activate features: initialise CCIDs, sequence windows etc.
*/
if (dccp_feat_activate_values(newsk, &dreq->dreq_featneg)) {
- /* It is still raw copy of parent, so invalidate
- * destructor and make plain sk_free() */
- newsk->sk_destruct = NULL;
- bh_unlock_sock(newsk);
- sk_free(newsk);
+ sk_free_unlock_clone(newsk);
return NULL;
}
dccp_init_xmit_timers(newsk);
--
GitLab