From f302f37f1630fa57d309ee8571031d169784141c Mon Sep 17 00:00:00 2001 From: Tirthendu Sarkar Date: Thu, 7 Sep 2023 09:20:32 +0530 Subject: xsk: add multi-buffer support for sockets sharing umem [ Upstream commit d609f3d228a8efe991f44f11f24146e2a5209755 ] Userspace applications indicate their multi-buffer capability to xsk using XSK_USE_SG socket bind flag. For sockets using shared umem the bind flag may contain XSK_USE_SG only for the first socket. For any subsequent socket the only option supported is XDP_SHARED_UMEM. Add option XDP_UMEM_SG_FLAG in umem config flags to store the multi-buffer handling capability when indicated by XSK_USE_SG option in bing flag by the first socket. Use this to derive multi-buffer capability for subsequent sockets in xsk core. Signed-off-by: Tirthendu Sarkar Fixes: 81470b5c3c66 ("xsk: introduce XSK_USE_SG bind flag for xsk socket") Acked-by: Maciej Fijalkowski Link: https://lore.kernel.org/r/20230907035032.2627879-1-tirthendu.sarkar@intel.com Signed-off-by: Alexei Starovoitov Signed-off-by: Sasha Levin --- net/xdp/xsk.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/xdp/xsk.c') diff --git a/net/xdp/xsk.c b/net/xdp/xsk.c index 3515e19852d8..774a6d1916e4 100644 --- a/net/xdp/xsk.c +++ b/net/xdp/xsk.c @@ -1227,7 +1227,7 @@ static int xsk_bind(struct socket *sock, struct sockaddr *addr, int addr_len) xs->dev = dev; xs->zc = xs->umem->zc; - xs->sg = !!(flags & XDP_USE_SG); + xs->sg = !!(xs->umem->flags & XDP_UMEM_SG_FLAG); xs->queue_id = qid; xp_add_xsk(xs->pool, xs); -- cgit v1.2.3