vsock/virtio: Move length check to callers of virtio_vsock_skb_rx_put()

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[Upstream commit 87dbae5e36]

virtio_vsock_skb_rx_put() only calls skb_put() if the length in the
packet header is not zero even though skb_put() handles this case
gracefully.

Remove the functionally redundant check from virtio_vsock_skb_rx_put()
and, on the assumption that this is a worthwhile optimisation for
handling credit messages, augment the existing length checks in
virtio_transport_rx_work() to elide the call for zero-length payloads.
Since the callers all have the length, extend virtio_vsock_skb_rx_put()
to take it as an additional parameter rather than fish it back out of
the packet header.

Note that the vhost code already has similar logic in
vhost_vsock_alloc_skb().

Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Will Deacon <will@kernel.org>
Message-Id: <20250717090116.11987-4-will@kernel.org>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Heitor Alves de Siqueira <halves@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Will Deacon 2026-01-26 17:16:52 -03:00 • committed by Greg Kroah-Hartman

parent 9f1a002f01

commit ca82ab9fd9

3 changed files with 6 additions and 9 deletions

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2

drivers/vhost/vsock.c

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9

include/linux/virtio_vsock.h

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4

net/vmw_vsock/virtio_transport.c

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