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authorArnaldo Carvalho de Melo <acme@redhat.com>2017-03-01 16:35:08 -0300
committerDavid S. Miller <davem@davemloft.net>2017-03-02 13:19:33 -0800
commit94352d45092c23874532221b4d1e4721df9d63df (patch)
tree4962d392f77f9afe5fad1f5dc5eca4bd99ff651d
parentd5afb6f9b6bb2c57bd0c05e76e12489dc0d037d9 (diff)
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>
-rw-r--r--include/net/sock.h1
-rw-r--r--net/core/sock.c16
-rw-r--r--net/dccp/minisocks.c6
3 files changed, 13 insertions, 10 deletions
diff --git a/include/net/sock.h b/include/net/sock.h
index 9ccefa5c5487..5e5997654db6 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 e7d74940e863..f6fd79f33097 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 @@ out:
}
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 d20d948a98ed..e267e6f4c9a5 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);