linux-kernel - [RFC PATCH 3/7] tun: allow use of BPF_PROG_TYPE_SCHED

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Date:   Tue, 12 Jan 2021 21:41:39 +0200
From:   Yuri Benditovich <yuri.benditovich@...nix.com>
To:     davem@...emloft.net, kuba@...nel.org, mst@...hat.com,
        jasowang@...hat.com, ast@...nel.org, daniel@...earbox.net,
        andrii@...nel.org, kafai@...com, songliubraving@...com, yhs@...com,
        john.fastabend@...il.com, kpsingh@...nel.org,
        rdunlap@...radead.org, willemb@...gle.com, gustavoars@...nel.org,
        herbert@...dor.apana.org.au, steffen.klassert@...unet.com,
        nogikh@...gle.com, pablo@...filter.org, decui@...rosoft.com,
        cai@....pw, jakub@...udflare.com, elver@...gle.com,
        pabeni@...hat.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, bpf@...r.kernel.org
Cc:     yan@...nix.com
Subject: [RFC PATCH 3/7] tun: allow use of BPF_PROG_TYPE_SCHED_CLS program type

This program type can set skb hash value. It will be useful
when the tun will support hash reporting feature if virtio-net.

Signed-off-by: Yuri Benditovich <yuri.benditovich@...nix.com>
---
 drivers/net/tun.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 7959b5c2d11f..455f7afc1f36 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -2981,6 +2981,8 @@ static int tun_set_ebpf(struct tun_struct *tun, struct tun_prog __rcu **prog_p,
 		prog = NULL;
 	} else {
 		prog = bpf_prog_get_type(fd, BPF_PROG_TYPE_SOCKET_FILTER);
+		if (IS_ERR(prog))
+			prog = bpf_prog_get_type(fd, BPF_PROG_TYPE_SCHED_CLS);
 		if (IS_ERR(prog))
 			return PTR_ERR(prog);
 	}
-- 
2.17.1