From fe2308328cd2f26ebc986f543796e7d13ae00bc4 Mon Sep 17 00:00:00 2001 From: Magnus Karlsson Date: Wed, 2 May 2018 13:01:31 +0200 Subject: xsk: add umem completion queue support and mmap Here, we add another setsockopt for registered user memory (umem) called XDP_UMEM_COMPLETION_QUEUE. Using this socket option, the process can ask the kernel to allocate a queue (ring buffer) and also mmap it (XDP_UMEM_PGOFF_COMPLETION_QUEUE) into the process. The queue is used to explicitly pass ownership of umem frames from the kernel to user process. This will be used by the TX path to tell user space that a certain frame has been transmitted and user space can use it for something else, if it wishes. Signed-off-by: Magnus Karlsson Signed-off-by: Alexei Starovoitov --- net/xdp/xdp_umem.h | 1 + 1 file changed, 1 insertion(+) (limited to 'net/xdp/xdp_umem.h') diff --git a/net/xdp/xdp_umem.h b/net/xdp/xdp_umem.h index c7378a11721f..7e0b2fab8522 100644 --- a/net/xdp/xdp_umem.h +++ b/net/xdp/xdp_umem.h @@ -24,6 +24,7 @@ struct xdp_umem { struct xsk_queue *fq; + struct xsk_queue *cq; struct page **pgs; struct xdp_umem_props props; u32 npgs; -- cgit v1.2.3