tcp: Pass union tcp_conn pointer to destroy and splice timer functions

The pointers are actually the same, but we later pass the container
union to tcp_table_compact(), which might zero the size of the whole
union, and this confuses Coverity Scan.

Given that we have pointers to the container union to start with,
just pass those instead, all the way down to tcp_table_compact().

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>

1 files changed, 10 insertions, 6 deletions

diff --git a/tcp_splice.c b/tcp_splice.c
index e2f0ce1..72b1672 100644
--- a/tcp_splice.c
+++ b/tcp_splice.c
@@ -251,10 +251,12 @@ void tcp_splice_conn_update(struct ctx *c, struct tcp_splice_conn *new)
 /**
  * tcp_splice_destroy() - Close spliced connection and pipes, clear
  * @c:		Execution context
- * @conn:	Connection pointer
+ * @conn_union:	Spliced connection (container union)
  */
-void tcp_splice_destroy(struct ctx *c, struct tcp_splice_conn *conn)
+void tcp_splice_destroy(struct ctx *c, union tcp_conn *conn_union)
 {
+	struct tcp_splice_conn *conn = &conn_union->splice;
+
 	if (conn->events & SPLICE_ESTABLISHED) {
 		/* Flushing might need to block: don't recycle them. */
 		if (conn->pipe_a_b[0] != -1) {
@@ -283,7 +285,7 @@ void tcp_splice_destroy(struct ctx *c, struct tcp_splice_conn *conn)
 	debug("TCP (spliced): index %li, CLOSED", CONN_IDX(conn));
 
 	c->tcp.splice_conn_count--;
-	tcp_table_compact(c, (union tcp_conn *)conn);
+	tcp_table_compact(c, conn_union);
 }
 
 /**
@@ -824,12 +826,14 @@ void tcp_splice_init(struct ctx *c)
 /**
  * tcp_splice_timer() - Timer for spliced connections
  * @c:		Execution context
- * @conn:	Spliced connection
+ * @conn_union:	Spliced connection (container union)
  */
-void tcp_splice_timer(struct ctx *c, struct tcp_splice_conn *conn)
+void tcp_splice_timer(struct ctx *c, union tcp_conn *conn_union)
 {
+	struct tcp_splice_conn *conn = &conn_union->splice;
+
 	if (conn->flags & CLOSING) {
-		tcp_splice_destroy(c, conn);
+		tcp_splice_destroy(c, conn_union);
 		return;
 	}