1 files changed, 76 insertions, 0 deletions
diff --git a/backport-include/net/sock.h b/backport-include/net/sock.h
new file mode 100644
index 0000000..b4f3e6a
--- /dev/null
+++ b/backport-include/net/sock.h
@@ -0,0 +1,76 @@
+#ifndef __BACKPORT_NET_SOCK_H
+#define __BACKPORT_NET_SOCK_H
+#include_next <net/sock.h>
+#include <linux/version.h>
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(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_CODE < KERNEL_VERSION(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
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35)
+static inline wait_queue_head_t *sk_sleep(struct sock *sk)
+{
+	return sk->sk_sleep;
+}
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,34)
+static inline struct sock *sk_entry(const struct hlist_node *node)
+{
+	return hlist_entry(node, struct sock, sk_node);
+}
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,33)
+#define sock_recv_ts_and_drops(msg, sk, skb) sock_recv_timestamp(msg, sk, skb)
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,31)
+static inline int sk_rmem_alloc_get(const struct sock *sk)
+{
+	return atomic_read(&sk->sk_rmem_alloc);
+}
+
+static inline int sk_wmem_alloc_get(const struct sock *sk)
+{
+	return atomic_read(&sk->sk_wmem_alloc) - 1;
+}
+
+static inline bool sk_has_allocations(const struct sock *sk)
+{
+	return sk_wmem_alloc_get(sk) || sk_rmem_alloc_get(sk);
+}
+#endif
+
+#endif /* __BACKPORT_NET_SOCK_H */