compat: add sk_wmem_alloc_get and sk_has_allocations

These functions are copied from the kernel.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: Luis R. Rodriguez <mcgrof@frijolero.org>

diff --git a/include/linux/compat-2.6.31.h b/include/linux/compat-2.6.31.h
index 25db973dff99bed4596b9b9e9578f8f9091195e8..347ae26d14be423a230c1f22b81701736fb5aa9d 100644 (file)
--- a/include/linux/compat-2.6.31.h
+++ b/include/linux/compat-2.6.31.h
@@ -11,6 +11,7 @@
 #include <net/dst.h>
 #include <net/genetlink.h>
 #include <linux/ethtool.h>
+#include <net/sock.h>
 
 /*
  * These macros allow us to backport rfkill without any
@@ -215,6 +216,39 @@ extern long long atomic64_add_return(long long a, atomic64_t *v);
 
 #endif
 
+/**
+ * sk_rmem_alloc_get - returns read allocations
+ * @sk: socket
+ *
+ * Returns sk_rmem_alloc
+ */
+static inline int sk_rmem_alloc_get(const struct sock *sk)
+{
+       return atomic_read(&sk->sk_rmem_alloc);
+}
+
+/**
+ * sk_wmem_alloc_get - returns write allocations
+ * @sk: socket
+ *
+ * Returns sk_wmem_alloc minus initial offset of one
+ */
+static inline int sk_wmem_alloc_get(const struct sock *sk)
+{
+       return atomic_read(&sk->sk_wmem_alloc) - 1;
+}
+
+/**
+ * sk_has_allocations - check if allocations are outstanding
+ * @sk: socket
+ *
+ * Returns true if socket has write or read allocations
+ */
+static inline bool sk_has_allocations(const struct sock *sk)
+{
+       return sk_wmem_alloc_get(sk) || sk_rmem_alloc_get(sk);
+}
+
 
 #endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,31)) */