1 files changed, 78 insertions, 0 deletions
diff --git a/backport-include/net/sock.h b/backport-include/net/sock.h
new file mode 100644
index 0000000..39bf008
--- /dev/null
+++ b/backport-include/net/sock.h
@@ -0,0 +1,78 @@
+#ifndef __BACKPORT_NET_SOCK_H
+#define __BACKPORT_NET_SOCK_H
+#include_next <net/sock.h>
+#include <linux/version.h>
+
+#if LINUX_VERSION_IS_LESS(3,9,0)
+#include <backport/magic.h>
+
+#define sk_for_each3(__sk, node, list) \
+	hlist_for_each_entry(__sk, node, list, sk_node)
+
+#define sk_for_each_safe4(__sk, node, tmp, list) \
+	hlist_for_each_entry_safe(__sk, node, tmp, list, sk_node)
+
+#define sk_for_each2(__sk, list) \
+	hlist_for_each_entry(__sk, list, sk_node)
+
+#define sk_for_each_safe3(__sk, tmp, list) \
+	hlist_for_each_entry_safe(__sk, tmp, list, sk_node)
+
+#undef sk_for_each
+#define sk_for_each(...) \
+	macro_dispatcher(sk_for_each, __VA_ARGS__)(__VA_ARGS__)
+#undef sk_for_each_safe
+#define sk_for_each_safe(...) \
+	macro_dispatcher(sk_for_each_safe, __VA_ARGS__)(__VA_ARGS__)
+
+#endif
+
+#if LINUX_VERSION_IS_LESS(3,10,0)
+/*
+ * backport SOCK_SELECT_ERR_QUEUE -- see commit
+ * "net: add option to enable error queue packets waking select"
+ *
+ * Adding 14 to SOCK_QUEUE_SHRUNK will reach a bet that can't be
+ * set on older kernels, so sock_flag() will always return false.
+ */
+#define SOCK_SELECT_ERR_QUEUE (SOCK_QUEUE_SHRUNK + 14)
+#endif
+
+#ifndef sock_skb_cb_check_size
+#define sock_skb_cb_check_size(size) \
+	BUILD_BUG_ON((size) > FIELD_SIZEOF(struct sk_buff, cb))
+#endif
+
+#if LINUX_VERSION_IS_LESS(4,2,0)
+#define sk_alloc(net, family, priority, prot, kern) sk_alloc(net, family, priority, prot)
+#endif
+
+#if LINUX_VERSION_IS_LESS(4,5,0)
+#define sk_set_bit LINUX_BACKPORT(sk_set_bit)
+static inline void sk_set_bit(int nr, struct sock *sk)
+{
+	set_bit(nr, &sk->sk_socket->flags);
+}
+#endif /* < 4.5 */
+
+#if LINUX_VERSION_IS_LESS(4,5,0)
+#define sk_clear_bit LINUX_BACKPORT(sk_clear_bit)
+static inline void sk_clear_bit(int nr, struct sock *sk)
+{
+	clear_bit(nr, &sk->sk_socket->flags);
+}
+#endif /* < 4.5 */
+
+#if LINUX_VERSION_IS_LESS(4,16,0)
+#define sk_pacing_shift_update LINUX_BACKPORT(sk_pacing_shift_update)
+static inline void sk_pacing_shift_update(struct sock *sk, int val)
+{
+#if LINUX_VERSION_IS_GEQ(4,15,0)
+	if (!sk || !sk_fullsock(sk) || sk->sk_pacing_shift == val)
+		return;
+	sk->sk_pacing_shift = val;
+#endif /* >= 4.15 */
+}
+#endif /* < 4.16 */
+
+#endif /* __BACKPORT_NET_SOCK_H */