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libbpf: add support for need_wakeup flag in AF_XDP part

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This commit adds support for the new need_wakeup flag in AF_XDP. The
xsk_socket__create function is updated to handle this and a new
function is introduced called xsk_ring_prod__needs_wakeup(). This
function can be used by the application to check if Rx and/or Tx
processing needs to be explicitly woken up.

Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Acked-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Magnus Karlsson
2019-08-14 09:27:20 +02:00
committed by yonghong-song
parent d34efeeef1
commit 5771dacd3d
3 changed files with 23 additions and 0 deletions
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6
src/xsk.h
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@@ -32,6 +32,7 @@ struct name { \
__u32 *producer; \
__u32 *consumer; \
void *ring; \
__u32 *flags; \
}
DEFINE_XSK_RING(xsk_ring_prod);
@@ -76,6 +77,11 @@ xsk_ring_cons__rx_desc(const struct xsk_ring_cons *rx, __u32 idx)
return &descs[idx & rx->mask];
}
static inline int xsk_ring_prod__needs_wakeup(const struct xsk_ring_prod *r)
{
return *r->flags & XDP_RING_NEED_WAKEUP;
}
static inline __u32 xsk_prod_nb_free(struct xsk_ring_prod *r, __u32 nb)
{
__u32 free_entries = r->cached_cons - r->cached_prod;