linux

iv/linux

History

Andrey Smetanin 6ab9468d3e vhost_net: revert upend_idx only on retriable error

[ Upstream commit 1f5d2e3bab16369d5d4b4020a25db4ab1f4f082c ]

Fix possible virtqueue used buffers leak and corresponding stuck
in case of temporary -EIO from sendmsg() which is produced by
tun driver while backend device is not up.

In case of no-retriable error and zcopy do not revert upend_idx
to pass packet data (that is update used_idx in corresponding
vhost_zerocopy_signal_used()) as if packet data has been
transferred successfully.

v2: set vq->heads[ubuf->desc].len equal to VHOST_DMA_DONE_LEN
in case of fake successful transmit.

Signed-off-by: Andrey Smetanin <asmetanin@yandex-team.ru>
Message-Id: <20230424204411.24888-1-asmetanin@yandex-team.ru>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Andrey Smetanin <asmetanin@yandex-team.ru>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2023-06-28 11:12:40 +02:00

iotlb.c

vhost_iotlb: split out IOTLB initialization

2022-05-31 12:44:28 -04:00

Kconfig

vhost_vdpa: implement IRQ offloading in vhost_vdpa

2020-08-05 11:08:42 -04:00

Makefile

vhost: introduce vDPA-based backend

2020-04-02 10:41:40 -04:00

net.c

vhost_net: revert upend_idx only on retriable error