Add support for sockmap to vsock.
We're testing usage of vsock as a way to redirect guest-local UDS requests to
the host and this patch series greatly improves the performance of such a
setup.
Compared to copying packets via userspace, this improves throughput by 121% in
basic testing.
Tested as follows.
Setup: guest unix dgram sender -> guest vsock redirector -> host vsock server
Threads: 1
Payload: 64k
No sockmap:
- 76.3 MB/s
- The guest vsock redirector was
"socat VSOCK-CONNECT:2:1234 UNIX-RECV:/path/to/sock"
Using sockmap (this patch):
- 168.8 MB/s (+121%)
- The guest redirector was a simple sockmap echo server,
redirecting unix ingress to vsock 2:1234 egress.
- Same sender and server programs
*Note: these numbers are from RFC v1
Only the virtio transport has been tested. The loopback transport was used in
writing bpf/selftests, but not thoroughly tested otherwise.
This series requires the skb patch.
Changes in v2:
- vsock/bpf: rename vsock_dgram_* -> vsock_*
- vsock/bpf: change sk_psock_{get,put} and {lock,release}_sock() order to
minimize slock hold time
- vsock/bpf: use "new style" wait
- vsock/bpf: fix bug in wait log
- vsock/bpf: add check that recvmsg sk_type is one dgram, seqpacket, or stream.
Return error if not one of the three.
- virtio/vsock: comment __skb_recv_datagram() usage
- virtio/vsock: do not init copied in read_skb()
- vsock/bpf: add ifdef guard around struct proto in dgram_recvmsg()
- selftests/bpf: add vsock loopback config for aarch64
- selftests/bpf: add vsock loopback config for s390x
- selftests/bpf: remove vsock device from vmtest.sh qemu machine
- selftests/bpf: remove CONFIG_VIRTIO_VSOCKETS=y from config.x86_64
- vsock/bpf: move transport-related (e.g., if (!vsk->transport)) checks out of
fast path
Signed-off-by: Bobby Eshleman <bobby.eshleman@xxxxxxxxxxxxx>
---
Bobby Eshleman (3):
vsock: support sockmap
selftests/bpf: add vsock to vmtest.sh
selftests/bpf: Add a test case for vsock sockmap
drivers/vhost/vsock.c | 1 +
include/linux/virtio_vsock.h | 1 +
include/net/af_vsock.h | 17 ++
net/vmw_vsock/Makefile | 1 +
net/vmw_vsock/af_vsock.c | 55 ++++++-
net/vmw_vsock/virtio_transport.c | 2 +
net/vmw_vsock/virtio_transport_common.c | 24 +++
net/vmw_vsock/vsock_bpf.c | 175 +++++++++++++++++++++
net/vmw_vsock/vsock_loopback.c | 2 +
tools/testing/selftests/bpf/config.aarch64 | 2 +
tools/testing/selftests/bpf/config.s390x | 3 +
tools/testing/selftests/bpf/config.x86_64 | 3 +
.../selftests/bpf/prog_tests/sockmap_listen.c | 163 +++++++++++++++++++
13 files changed, 443 insertions(+), 6 deletions(-)
---
base-commit: d83115ce337a632f996e44c9f9e18cadfcf5a094
change-id: 20230118-support-vsock-sockmap-connectible-2e1297d2111a
Best regards,
--
Bobby Eshleman <bobby.eshleman@xxxxxxxxxxxxx>
