netdev - [RFC v2 bpf-next 3/7] xsk: add usage of XDP features flags

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Message-Id: <36956338853442e6d546687678a93470a164ff17.1673710867.git.lorenzo@kernel.org>
Date:   Sat, 14 Jan 2023 16:54:33 +0100
From:   Lorenzo Bianconi <lorenzo@...nel.org>
To:     bpf@...r.kernel.org
Cc:     netdev@...r.kernel.org, ast@...nel.org, daniel@...earbox.net,
        andrii@...nel.org, davem@...emloft.net, kuba@...nel.org,
        hawk@...nel.org, pabeni@...hat.com, edumazet@...gle.com,
        toke@...hat.com, memxor@...il.com, alardam@...il.com,
        saeedm@...dia.com, anthony.l.nguyen@...el.com, gospo@...adcom.com,
        vladimir.oltean@....com, nbd@....name, john@...ozen.org,
        leon@...nel.org, simon.horman@...igine.com, aelior@...vell.com,
        christophe.jaillet@...adoo.fr, ecree.xilinx@...il.com,
        mst@...hat.com, bjorn@...nel.org, magnus.karlsson@...el.com,
        maciej.fijalkowski@...el.com, intel-wired-lan@...ts.osuosl.org,
        lorenzo.bianconi@...hat.com
Subject: [RFC v2 bpf-next 3/7] xsk: add usage of XDP features flags

From: Marek Majtyka <alardam@...il.com>

Change necessary condition check for XSK from ndo functions to
xdp features flags.

Signed-off-by: Marek Majtyka <alardam@...il.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@...nel.org>
---
 net/xdp/xsk_buff_pool.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/net/xdp/xsk_buff_pool.c b/net/xdp/xsk_buff_pool.c
index ed6c71826d31..2e6fa082142a 100644
--- a/net/xdp/xsk_buff_pool.c
+++ b/net/xdp/xsk_buff_pool.c
@@ -178,8 +178,7 @@ int xp_assign_dev(struct xsk_buff_pool *pool,
 		/* For copy-mode, we are done. */
 		return 0;
 
-	if (!netdev->netdev_ops->ndo_bpf ||
-	    !netdev->netdev_ops->ndo_xsk_wakeup) {
+	if ((netdev->xdp_features & NETDEV_XDP_ACT_ZC) != NETDEV_XDP_ACT_ZC) {
 		err = -EOPNOTSUPP;
 		goto err_unreg_pool;
 	}
-- 
2.39.0