qcacmn: QDF API for skb_copy_expand

Add QDF wrappers for skb_copy_expand

Change-Id: I401241259c87a067ed4773bee9fdfc7ee3cdcc23

qdf/inc/qdf_nbuf.h

@@ -1581,6 +1581,24 @@ qdf_nbuf_t qdf_nbuf_clone_debug(qdf_nbuf_t buf, const char *func,
  */
 qdf_nbuf_t qdf_nbuf_copy_debug(qdf_nbuf_t buf, const char *func, uint32_t line);
 
+#define qdf_nbuf_copy_expand(buf, headroom, tailroom)     \
+	qdf_nbuf_copy_expand_debug(buf, headroom, tailroom, __func__, __LINE__)
+
+/**
+ * qdf_nbuf_copy_expand_debug() - copy and expand nbuf
+ * @buf: Network buf instance
+ * @headroom: Additional headroom to be added
+ * @tailroom: Additional tailroom to be added
+ * @func: name of the calling function
+ * @line: line number of the callsite
+ *
+ * Return: New nbuf that is a copy of buf, with additional head and tailroom
+ *	or NULL if there is no memory
+ */
+qdf_nbuf_t
+qdf_nbuf_copy_expand_debug(qdf_nbuf_t buf, int headroom, int tailroom,
+			   const char *func, uint32_t line);
+
 #else /* NBUF_MEMORY_DEBUG */
 
 static inline void qdf_net_buf_debug_init(void) {}
@@ -1648,6 +1666,20 @@ static inline qdf_nbuf_t qdf_nbuf_copy(qdf_nbuf_t buf)
 	return __qdf_nbuf_copy(buf);
 }
 
+/**
+ * qdf_nbuf_copy_expand() - copy and expand nbuf
+ * @buf: Network buf instance
+ * @headroom: Additional headroom to be added
+ * @tailroom: Additional tailroom to be added
+ *
+ * Return: New nbuf that is a copy of buf, with additional head and tailroom
+ *	or NULL if there is no memory
+ */
+static inline qdf_nbuf_t qdf_nbuf_copy_expand(qdf_nbuf_t buf, int headroom,
+					      int tailroom)
+{
+	return __qdf_nbuf_copy_expand(buf, headroom, tailroom);
+}
 #endif /* NBUF_MEMORY_DEBUG */
 
 #ifdef WLAN_FEATURE_FASTPATH

qdf/linux/src/i_qdf_nbuf.h

@@ -1915,6 +1915,21 @@ __qdf_nbuf_expand(struct sk_buff *skb, uint32_t headroom, uint32_t tailroom)
 	return NULL;
 }
 
+/**
+ * __qdf_nbuf_copy_expand() - copy and expand nbuf
+ * @buf: Network buf instance
+ * @headroom: Additional headroom to be added
+ * @tailroom: Additional tailroom to be added
+ *
+ * Return: New nbuf that is a copy of buf, with additional head and tailroom
+ *	or NULL if there is no memory
+ */
+static inline struct sk_buff *
+__qdf_nbuf_copy_expand(struct sk_buff *buf, int headroom, int tailroom)
+{
+	return skb_copy_expand(buf, headroom, tailroom, GFP_ATOMIC);
+}
+
 /**
  * __qdf_nbuf_tx_cksum_info() - tx checksum info
  *

qdf/linux/src/qdf_nbuf.c

@@ -555,6 +555,7 @@ enum qdf_nbuf_event_type {
 	QDF_NBUF_FREE,
 	QDF_NBUF_MAP,
 	QDF_NBUF_UNMAP,
+	QDF_NBUF_ALLOC_COPY_EXPAND,
 };
 
 struct qdf_nbuf_event {
@@ -2681,6 +2682,25 @@ qdf_nbuf_t qdf_nbuf_copy_debug(qdf_nbuf_t buf, const char *func, uint32_t line)
 }
 qdf_export_symbol(qdf_nbuf_copy_debug);
 
+qdf_nbuf_t
+qdf_nbuf_copy_expand_debug(qdf_nbuf_t buf, int headroom, int tailroom,
+			   const char *func, uint32_t line)
+{
+	qdf_nbuf_t copied_buf = __qdf_nbuf_copy_expand(buf, headroom, tailroom);
+
+	if (qdf_unlikely(!copied_buf))
+		return NULL;
+
+	/* Store SKB in internal QDF tracking table */
+	qdf_net_buf_debug_add_node(copied_buf, 0, func, line);
+	qdf_nbuf_history_add(copied_buf, func, line,
+			     QDF_NBUF_ALLOC_COPY_EXPAND);
+
+	return copied_buf;
+}
+
+qdf_export_symbol(qdf_nbuf_copy_expand_debug);
+
 #endif /* NBUF_MEMORY_DEBUG */
 
 #if defined(FEATURE_TSO)