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tap: Shrink zeroed virtio-net header

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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>
This commit is contained in:
Akihiko Odaki 2024-04-28 16:00:49 +09:00 committed by Jason Wang
parent 336a058b26
commit 77db537995
1 changed files with 1 additions and 1 deletions
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net/tap.c
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@ -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);