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xsk: add Rx queue setup and mmap support

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Another setsockopt (XDP_RX_QUEUE) is added to let the process allocate
a queue, where the kernel can pass completed Rx frames from the kernel
to user process.

The mmapping of the queue is done using the XDP_PGOFF_RX_QUEUE offset.

Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Björn Töpel
2018-05-02 13:01:25 +02:00
committed by Alexei Starovoitov
parent 423f38329d
commit b9b6b68e8a
5 changed files with 62 additions and 12 deletions
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4
include/net/xdp_sock.h
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@@ -18,11 +18,15 @@
#include <linux/mutex.h>
#include <net/sock.h>
struct net_device;
struct xsk_queue;
struct xdp_umem;
struct xdp_sock {
/* struct sock must be the first member of struct xdp_sock */
struct sock sk;
struct xsk_queue *rx;
struct net_device *dev;
struct xdp_umem *umem;
/* Protects multiple processes in the control path */
struct mutex mutex;