From: Akihiko Odaki <akihiko.odaki@daynix.com>
To: Jason Wang <jasowang@redhat.com>,
Dmitry Fleytman <dmitry.fleytman@gmail.com>,
Sriram Yagnaraman <sriram.yagnaraman@est.tech>,
"Michael S. Tsirkin" <mst@redhat.com>,
Luigi Rizzo <rizzo@iet.unipi.it>,
Giuseppe Lettieri <g.lettieri@iet.unipi.it>,
Vincenzo Maffione <v.maffione@gmail.com>,
Andrew Melnychenko <andrew@daynix.com>,
Yuri Benditovich <yuri.benditovich@daynix.com>
Cc: qemu-devel@nongnu.org, Akihiko Odaki <akihiko.odaki@daynix.com>
Subject: [PATCH v8 06/19] tap: Shrink zeroed virtio-net header
Date: Sun, 10 Dec 2023 14:29:44 +0900 [thread overview]
Message-ID: <20231210-rss-v8-6-9553ee714d38@daynix.com> (raw)
In-Reply-To: <20231210-rss-v8-0-9553ee714d38@daynix.com>
tap prepends a zeroed virtio-net header when writing a packet to a
tap with virtio-net header enabled but not in use. This only happens
when s->host_vnet_hdr_len == sizeof(struct virtio_net_hdr).
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
---
net/tap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/tap.c b/net/tap.c
index 4d450d2972..7666ada8d9 100644
--- a/net/tap.c
+++ b/net/tap.c
@@ -119,7 +119,7 @@ static ssize_t tap_receive_iov(NetClientState *nc, const struct iovec *iov,
TAPState *s = DO_UPCAST(TAPState, nc, nc);
const struct iovec *iovp = iov;
g_autofree struct iovec *iov_copy = NULL;
- struct virtio_net_hdr_mrg_rxbuf hdr = { };
+ struct virtio_net_hdr hdr = { };
if (s->host_vnet_hdr_len && !s->using_vnet_hdr) {
iov_copy = g_new(struct iovec, iovcnt + 1);
--
2.43.0
next prev parent reply other threads:[~2023-12-10 5:32 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-10 5:29 [PATCH v8 00/19] virtio-net RSS/hash report fixes and improvements Akihiko Odaki
2023-12-10 5:29 ` [PATCH v8 01/19] tap: Remove tap_probe_vnet_hdr_len() Akihiko Odaki
2023-12-10 5:29 ` [PATCH v8 02/19] tap: Remove qemu_using_vnet_hdr() Akihiko Odaki
2023-12-10 5:29 ` [PATCH v8 03/19] net: Move virtio-net header length assertion Akihiko Odaki
2023-12-10 5:29 ` [PATCH v8 04/19] net: Remove receive_raw() Akihiko Odaki
2023-12-10 5:29 ` [PATCH v8 05/19] tap: Call tap_receive_iov() from tap_receive() Akihiko Odaki
2023-12-10 5:29 ` Akihiko Odaki [this message]
2023-12-10 5:29 ` [PATCH v8 07/19] virtio-net: Copy header only when necessary Akihiko Odaki
2023-12-10 5:29 ` [PATCH v8 08/19] virtio-net: Disable RSS on reset Akihiko Odaki
2023-12-10 5:29 ` [PATCH v8 09/19] virtio-net: Unify the logic to update NIC state for RSS Akihiko Odaki
2023-12-10 5:29 ` [PATCH v8 10/19] virtio-net: Return an error when vhost cannot enable RSS Akihiko Odaki
2023-12-10 5:29 ` [PATCH v8 11/19] virtio-net: Report RSS warning at device realization Akihiko Odaki
2023-12-10 5:29 ` [PATCH v8 12/19] virtio-net: Always set populate_hash Akihiko Odaki
2023-12-10 5:29 ` [PATCH v8 13/19] virtio-net: Do not write hashes to peer buffer Akihiko Odaki
2023-12-10 5:29 ` [PATCH v8 14/19] ebpf: Fix RSS error handling Akihiko Odaki
2023-12-10 5:29 ` [PATCH v8 15/19] ebpf: Use standard section name Akihiko Odaki
2023-12-10 5:29 ` [PATCH v8 16/19] ebpf: Simplify error handling Akihiko Odaki
2023-12-10 5:29 ` [PATCH v8 17/19] ebpf: Return 0 when configuration fails Akihiko Odaki
2023-12-10 5:29 ` [PATCH v8 18/19] ebpf: Refactor tun_rss_steering_prog() Akihiko Odaki
2023-12-10 5:29 ` [PATCH v8 19/19] ebpf: Add a separate target for skeleton Akihiko Odaki
2023-12-11 11:54 ` [PATCH v8 00/19] virtio-net RSS/hash report fixes and improvements Yuri Benditovich
2023-12-11 12:01 ` Akihiko Odaki
2023-12-11 12:34 ` Yuri Benditovich
2023-12-11 15:43 ` Michael S. Tsirkin
2023-12-11 19:51 ` Yuri Benditovich
2023-12-11 19:52 ` Yuri Benditovich
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