skb_put_padto() is used by the igb driver.
Signed-off-by: Hauke Mehrtens <hauke@xxxxxxxxxx>
---
backport/backport-include/linux/skbuff.h | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/backport/backport-include/linux/skbuff.h b/backport/backport-include/linux/skbuff.h
index 53c1aa4..687297c 100644
--- a/backport/backport-include/linux/skbuff.h
+++ b/backport/backport-include/linux/skbuff.h
@@ -269,6 +269,30 @@ static inline int memcpy_from_msg(void *data, struct msghdr *msg, int len)
{
return memcpy_fromiovec(data, msg->msg_iov, len);
}
+
+/**
+ * skb_put_padto - increase size and pad an skbuff up to a minimal size
+ * @skb: buffer to pad
+ * @len: minimal length
+ *
+ * Pads up a buffer to ensure the trailing bytes exist and are
+ * blanked. If the buffer already contains sufficient data it
+ * is untouched. Otherwise it is extended. Returns zero on
+ * success. The skb is freed on error.
+ */
+#define skb_put_padto LINUX_BACKPORT(skb_put_padto)
+static inline int skb_put_padto(struct sk_buff *skb, unsigned int len)
+{
+ unsigned int size = skb->len;
+
+ if (unlikely(size < len)) {
+ len -= size;
+ if (skb_pad(skb, len))
+ return -ENOMEM;
+ __skb_put(skb, len);
+ }
+ return 0;
+}
#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(3,19,0) */
#endif /* __BACKPORT_SKBUFF_H */
--
1.9.1
--
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