From: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
To: netdev@vger.kernel.org
Cc: Jesper Dangaard Brouer <hawk@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
"Michael S. Tsirkin" <mst@redhat.com>,
John Fastabend <john.fastabend@gmail.com>,
Alexei Starovoitov <ast@kernel.org>,
virtualization@lists.linux-foundation.org,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>,
bpf@vger.kernel.org, Paolo Abeni <pabeni@redhat.com>,
"David S. Miller" <davem@davemloft.net>
Subject: [PATCH net-next 6/8] virtio_net: auto release xdp shinfo
Date: Wed, 22 Mar 2023 11:03:06 +0800 [thread overview]
Message-ID: <20230322030308.16046-7-xuanzhuo@linux.alibaba.com> (raw)
In-Reply-To: <20230322030308.16046-1-xuanzhuo@linux.alibaba.com>
virtnet_build_xdp_buff_mrg() and virtnet_xdp_handler() auto
release xdp shinfo then the caller no need to careful the xdp shinfo.
Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
---
drivers/net/virtio_net.c | 29 +++++++++++++++++------------
1 file changed, 17 insertions(+), 12 deletions(-)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index a3f2bcb3db27..136131a7868a 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -833,14 +833,14 @@ static int virtnet_xdp_handler(struct bpf_prog *xdp_prog, struct xdp_buff *xdp,
stats->xdp_tx++;
xdpf = xdp_convert_buff_to_frame(xdp);
if (unlikely(!xdpf))
- return VIRTNET_XDP_RES_DROP;
+ goto drop;
err = virtnet_xdp_xmit(dev, 1, &xdpf, 0);
if (unlikely(!err)) {
xdp_return_frame_rx_napi(xdpf);
} else if (unlikely(err < 0)) {
trace_xdp_exception(dev, xdp_prog, act);
- return VIRTNET_XDP_RES_DROP;
+ goto drop;
}
*xdp_xmit |= VIRTIO_XDP_TX;
@@ -850,7 +850,7 @@ static int virtnet_xdp_handler(struct bpf_prog *xdp_prog, struct xdp_buff *xdp,
stats->xdp_redirects++;
err = xdp_do_redirect(dev, xdp, xdp_prog);
if (err)
- return VIRTNET_XDP_RES_DROP;
+ goto drop;
*xdp_xmit |= VIRTIO_XDP_REDIR;
return VIRTNET_XDP_RES_CONSUMED;
@@ -862,8 +862,12 @@ static int virtnet_xdp_handler(struct bpf_prog *xdp_prog, struct xdp_buff *xdp,
trace_xdp_exception(dev, xdp_prog, act);
fallthrough;
case XDP_DROP:
- return VIRTNET_XDP_RES_DROP;
+ goto drop;
}
+
+drop:
+ put_xdp_frags(xdp);
+ return VIRTNET_XDP_RES_DROP;
}
static unsigned int virtnet_get_headroom(struct virtnet_info *vi)
@@ -1199,7 +1203,7 @@ static int virtnet_build_xdp_buff_mrg(struct net_device *dev,
dev->name, *num_buf,
virtio16_to_cpu(vi->vdev, hdr->num_buffers));
dev->stats.rx_length_errors++;
- return -EINVAL;
+ goto err;
}
stats->bytes += len;
@@ -1218,7 +1222,7 @@ static int virtnet_build_xdp_buff_mrg(struct net_device *dev,
pr_debug("%s: rx error: len %u exceeds truesize %lu\n",
dev->name, len, (unsigned long)(truesize - room));
dev->stats.rx_length_errors++;
- return -EINVAL;
+ goto err;
}
frag = &shinfo->frags[shinfo->nr_frags++];
@@ -1233,6 +1237,10 @@ static int virtnet_build_xdp_buff_mrg(struct net_device *dev,
*xdp_frags_truesize = xdp_frags_truesz;
return 0;
+
+err:
+ put_xdp_frags(xdp);
+ return -EINVAL;
}
static void *mergeable_xdp_prepare(struct virtnet_info *vi,
@@ -1361,7 +1369,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
err = virtnet_build_xdp_buff_mrg(dev, vi, rq, &xdp, data, len, frame_sz,
&num_buf, &xdp_frags_truesz, stats);
if (unlikely(err))
- goto err_xdp_frags;
+ goto err_xdp;
act = virtnet_xdp_handler(xdp_prog, &xdp, dev, xdp_xmit, stats);
@@ -1369,7 +1377,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
case VIRTNET_XDP_RES_PASS:
head_skb = build_skb_from_xdp_buff(dev, vi, &xdp, xdp_frags_truesz);
if (unlikely(!head_skb))
- goto err_xdp_frags;
+ goto err_xdp;
rcu_read_unlock();
return head_skb;
@@ -1379,11 +1387,8 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
goto xdp_xmit;
case VIRTNET_XDP_RES_DROP:
- goto err_xdp_frags;
+ goto err_xdp;
}
-err_xdp_frags:
- put_xdp_frags(&xdp);
- goto err_xdp;
}
rcu_read_unlock();
--
2.32.0.3.g01195cf9f
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next prev parent reply other threads:[~2023-03-22 3:03 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-22 3:03 [PATCH net-next 0/8] virtio_net: refactor xdp codes Xuan Zhuo
2023-03-22 3:03 ` [PATCH net-next 1/8] virtio_net: mergeable xdp: put old page immediately Xuan Zhuo
[not found] ` <4bd07874-b1ad-336b-b15e-ba56a10182e9@huawei.com>
2023-03-23 1:36 ` Xuan Zhuo
[not found] ` <941a16c5-ba64-ca49-9af9-68d9615dca00@huawei.com>
2023-03-23 3:45 ` Xuan Zhuo
2023-03-23 5:38 ` Jason Wang
2023-03-23 5:58 ` Xuan Zhuo
2023-03-22 3:03 ` [PATCH net-next 2/8] virtio_net: mergeable xdp: introduce mergeable_xdp_prepare Xuan Zhuo
[not found] ` <c7749936-c154-da51-ccfb-f16150d19c62@huawei.com>
2023-03-23 1:45 ` Xuan Zhuo
[not found] ` <215e791d-1802-2419-ff59-49476bcdcd02@huawei.com>
2023-03-23 5:40 ` Jason Wang
[not found] ` <00509559-f3b6-2914-76f4-39e9e96f37c1@huawei.com>
2023-03-23 11:04 ` Xuan Zhuo
2023-03-23 10:59 ` Xuan Zhuo
2023-03-22 3:03 ` [PATCH net-next 3/8] virtio_net: introduce virtnet_xdp_handler() to seprate the logic of run xdp Xuan Zhuo
2023-03-22 3:03 ` [PATCH net-next 4/8] virtio_net: separate the logic of freeing xdp shinfo Xuan Zhuo
2023-03-22 3:03 ` [PATCH net-next 5/8] virtio_net: separate the logic of freeing the rest mergeable buf Xuan Zhuo
2023-03-22 3:03 ` Xuan Zhuo [this message]
2023-03-22 3:03 ` [PATCH net-next 7/8] virtio_net: introduce receive_mergeable_xdp() Xuan Zhuo
2023-03-22 23:43 ` kernel test robot
2023-03-22 3:03 ` [PATCH net-next 8/8] virtio_net: introduce receive_small_xdp() Xuan Zhuo
2023-03-23 2:06 ` kernel test robot
2023-03-22 3:34 ` [PATCH net-next 0/8] virtio_net: refactor xdp codes Michael S. Tsirkin
2023-03-22 3:40 ` Xuan Zhuo
2023-03-22 3:53 ` Michael S. Tsirkin
2023-03-22 3:56 ` Xuan Zhuo
2023-03-28 12:04 Xuan Zhuo
2023-03-28 12:04 ` [PATCH net-next 6/8] virtio_net: auto release xdp shinfo Xuan Zhuo
2023-04-03 3:18 ` Jason Wang
2023-04-03 4:17 ` Xuan Zhuo
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