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[PULL,06/20] tap: Shrink zeroed virtio-net header

Message ID 20240604073755.1859-7-jasowang@redhat.com
State New
Headers show
Series [PULL,01/20] tap: Remove tap_probe_vnet_hdr_len() | expand

Commit Message

Jason Wang June 4, 2024, 7:37 a.m. UTC 
From: Akihiko Odaki <akihiko.odaki@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>
Signed-off-by: Jason Wang <jasowang@redhat.com>
---
 net/tap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/net/tap.c b/net/tap.c
index 9825518ff1..51f7aec39d 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);