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 v4: - af_vsock: fix parameter alignment in vsock_dgram_recvmsg() - af_vsock: add TCP_ESTABLISHED comment in vsock_dgram_connect() - vsock/bpf: change ret type to bool
Changes in v3: - vsock/bpf: Refactor wait logic in vsock_bpf_recvmsg() to avoid backwards goto - vsock/bpf: Check psock before acquiring slock - vsock/bpf: Return bool instead of int of 0 or 1 - vsock/bpf: Wrap macro args __sk/__psock in parens - vsock/bpf: Place comment trailer */ on separate line
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@bytedance.com --- 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 | 64 +++++++- net/vmw_vsock/virtio_transport.c | 2 + net/vmw_vsock/virtio_transport_common.c | 25 +++ net/vmw_vsock/vsock_bpf.c | 174 +++++++++++++++++++++ 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, 452 insertions(+), 6 deletions(-) --- base-commit: e5b42483ccce50d5b957f474fd332afd4ef0c27b change-id: 20230327-vsock-sockmap-30b090c70cd1
Best regards,
This patch adds sockmap support for vsock sockets. It is intended to be usable by all transports, but only the virtio and loopback transports are implemented.
SOCK_STREAM, SOCK_DGRAM, and SOCK_SEQPACKET are all supported.
Signed-off-by: Bobby Eshleman bobby.eshleman@bytedance.com Acked-by: Michael S. Tsirkin mst@redhat.com --- 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 | 64 ++++++++++-- net/vmw_vsock/virtio_transport.c | 2 + net/vmw_vsock/virtio_transport_common.c | 25 +++++ net/vmw_vsock/vsock_bpf.c | 174 ++++++++++++++++++++++++++++++++ net/vmw_vsock/vsock_loopback.c | 2 + 9 files changed, 281 insertions(+), 6 deletions(-)
diff --git a/drivers/vhost/vsock.c b/drivers/vhost/vsock.c index c8e6087769a1..6578db78f0ae 100644 --- a/drivers/vhost/vsock.c +++ b/drivers/vhost/vsock.c @@ -439,6 +439,7 @@ static struct virtio_transport vhost_transport = { .notify_send_post_enqueue = virtio_transport_notify_send_post_enqueue, .notify_buffer_size = virtio_transport_notify_buffer_size,
+ .read_skb = virtio_transport_read_skb, },
.send_pkt = vhost_transport_send_pkt, diff --git a/include/linux/virtio_vsock.h b/include/linux/virtio_vsock.h index 3f9c16611306..c58453699ee9 100644 --- a/include/linux/virtio_vsock.h +++ b/include/linux/virtio_vsock.h @@ -245,4 +245,5 @@ u32 virtio_transport_get_credit(struct virtio_vsock_sock *vvs, u32 wanted); void virtio_transport_put_credit(struct virtio_vsock_sock *vvs, u32 credit); void virtio_transport_deliver_tap_pkt(struct sk_buff *skb); int virtio_transport_purge_skbs(void *vsk, struct sk_buff_head *list); +int virtio_transport_read_skb(struct vsock_sock *vsk, skb_read_actor_t read_actor); #endif /* _LINUX_VIRTIO_VSOCK_H */ diff --git a/include/net/af_vsock.h b/include/net/af_vsock.h index 568a87c5e0d0..0e7504a42925 100644 --- a/include/net/af_vsock.h +++ b/include/net/af_vsock.h @@ -75,6 +75,7 @@ struct vsock_sock { void *trans; };
+s64 vsock_connectible_has_data(struct vsock_sock *vsk); s64 vsock_stream_has_data(struct vsock_sock *vsk); s64 vsock_stream_has_space(struct vsock_sock *vsk); struct sock *vsock_create_connected(struct sock *parent); @@ -173,6 +174,9 @@ struct vsock_transport {
/* Addressing. */ u32 (*get_local_cid)(void); + + /* Read a single skb */ + int (*read_skb)(struct vsock_sock *, skb_read_actor_t); };
/**** CORE ****/ @@ -225,5 +229,18 @@ int vsock_init_tap(void); int vsock_add_tap(struct vsock_tap *vt); int vsock_remove_tap(struct vsock_tap *vt); void vsock_deliver_tap(struct sk_buff *build_skb(void *opaque), void *opaque); +int vsock_connectible_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, + int flags); +int vsock_dgram_recvmsg(struct socket *sock, struct msghdr *msg, + size_t len, int flags); + +#ifdef CONFIG_BPF_SYSCALL +extern struct proto vsock_proto; +int vsock_bpf_update_proto(struct sock *sk, struct sk_psock *psock, bool restore); +void __init vsock_bpf_build_proto(void); +#else +static inline void __init vsock_bpf_build_proto(void) +{} +#endif
#endif /* __AF_VSOCK_H__ */ diff --git a/net/vmw_vsock/Makefile b/net/vmw_vsock/Makefile index 6a943ec95c4a..5da74c4a9f1d 100644 --- a/net/vmw_vsock/Makefile +++ b/net/vmw_vsock/Makefile @@ -8,6 +8,7 @@ obj-$(CONFIG_HYPERV_VSOCKETS) += hv_sock.o obj-$(CONFIG_VSOCKETS_LOOPBACK) += vsock_loopback.o
vsock-y += af_vsock.o af_vsock_tap.o vsock_addr.o +vsock-$(CONFIG_BPF_SYSCALL) += vsock_bpf.o
vsock_diag-y += diag.o
diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c index 19aea7cba26e..5f2dda35c980 100644 --- a/net/vmw_vsock/af_vsock.c +++ b/net/vmw_vsock/af_vsock.c @@ -116,10 +116,13 @@ static void vsock_sk_destruct(struct sock *sk); static int vsock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
/* Protocol family. */ -static struct proto vsock_proto = { +struct proto vsock_proto = { .name = "AF_VSOCK", .owner = THIS_MODULE, .obj_size = sizeof(struct vsock_sock), +#ifdef CONFIG_BPF_SYSCALL + .psock_update_sk_prot = vsock_bpf_update_proto, +#endif };
/* The default peer timeout indicates how long we will wait for a peer response @@ -865,7 +868,7 @@ s64 vsock_stream_has_data(struct vsock_sock *vsk) } EXPORT_SYMBOL_GPL(vsock_stream_has_data);
-static s64 vsock_connectible_has_data(struct vsock_sock *vsk) +s64 vsock_connectible_has_data(struct vsock_sock *vsk) { struct sock *sk = sk_vsock(vsk);
@@ -874,6 +877,7 @@ static s64 vsock_connectible_has_data(struct vsock_sock *vsk) else return vsock_stream_has_data(vsk); } +EXPORT_SYMBOL_GPL(vsock_connectible_has_data);
s64 vsock_stream_has_space(struct vsock_sock *vsk) { @@ -1131,6 +1135,13 @@ static __poll_t vsock_poll(struct file *file, struct socket *sock, return mask; }
+static int vsock_read_skb(struct sock *sk, skb_read_actor_t read_actor) +{ + struct vsock_sock *vsk = vsock_sk(sk); + + return vsk->transport->read_skb(vsk, read_actor); +} + static int vsock_dgram_sendmsg(struct socket *sock, struct msghdr *msg, size_t len) { @@ -1242,18 +1253,42 @@ static int vsock_dgram_connect(struct socket *sock, memcpy(&vsk->remote_addr, remote_addr, sizeof(vsk->remote_addr)); sock->state = SS_CONNECTED;
+ /* sock map disallows redirection of non-TCP sockets with sk_state != + * TCP_ESTABLISHED (see sock_map_redirect_allowed()), so we set + * TCP_ESTABLISHED here to allow redirection of connected vsock dgrams. + * + * This doesn't seem to be abnormal state for datagram sockets, as the + * same approach can be see in other datagram socket types as well + * (such as unix sockets). + */ + sk->sk_state = TCP_ESTABLISHED; + out: release_sock(sk); return err; }
-static int vsock_dgram_recvmsg(struct socket *sock, struct msghdr *msg, - size_t len, int flags) +int vsock_dgram_recvmsg(struct socket *sock, struct msghdr *msg, + size_t len, int flags) { - struct vsock_sock *vsk = vsock_sk(sock->sk); +#ifdef CONFIG_BPF_SYSCALL + const struct proto *prot; +#endif + struct vsock_sock *vsk; + struct sock *sk; + + sk = sock->sk; + vsk = vsock_sk(sk); + +#ifdef CONFIG_BPF_SYSCALL + prot = READ_ONCE(sk->sk_prot); + if (prot != &vsock_proto) + return prot->recvmsg(sk, msg, len, flags, NULL); +#endif
return vsk->transport->dgram_dequeue(vsk, msg, len, flags); } +EXPORT_SYMBOL_GPL(vsock_dgram_recvmsg);
static const struct proto_ops vsock_dgram_ops = { .family = PF_VSOCK, @@ -1272,6 +1307,7 @@ static const struct proto_ops vsock_dgram_ops = { .recvmsg = vsock_dgram_recvmsg, .mmap = sock_no_mmap, .sendpage = sock_no_sendpage, + .read_skb = vsock_read_skb, };
static int vsock_transport_cancel_pkt(struct vsock_sock *vsk) @@ -2086,13 +2122,16 @@ static int __vsock_seqpacket_recvmsg(struct sock *sk, struct msghdr *msg, return err; }
-static int +int vsock_connectible_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, int flags) { struct sock *sk; struct vsock_sock *vsk; const struct vsock_transport *transport; +#ifdef CONFIG_BPF_SYSCALL + const struct proto *prot; +#endif int err;
sk = sock->sk; @@ -2139,6 +2178,14 @@ vsock_connectible_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, goto out; }
+#ifdef CONFIG_BPF_SYSCALL + prot = READ_ONCE(sk->sk_prot); + if (prot != &vsock_proto) { + release_sock(sk); + return prot->recvmsg(sk, msg, len, flags, NULL); + } +#endif + if (sk->sk_type == SOCK_STREAM) err = __vsock_stream_recvmsg(sk, msg, len, flags); else @@ -2148,6 +2195,7 @@ vsock_connectible_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, release_sock(sk); return err; } +EXPORT_SYMBOL_GPL(vsock_connectible_recvmsg);
static int vsock_set_rcvlowat(struct sock *sk, int val) { @@ -2188,6 +2236,7 @@ static const struct proto_ops vsock_stream_ops = { .mmap = sock_no_mmap, .sendpage = sock_no_sendpage, .set_rcvlowat = vsock_set_rcvlowat, + .read_skb = vsock_read_skb, };
static const struct proto_ops vsock_seqpacket_ops = { @@ -2209,6 +2258,7 @@ static const struct proto_ops vsock_seqpacket_ops = { .recvmsg = vsock_connectible_recvmsg, .mmap = sock_no_mmap, .sendpage = sock_no_sendpage, + .read_skb = vsock_read_skb, };
static int vsock_create(struct net *net, struct socket *sock, @@ -2348,6 +2398,8 @@ static int __init vsock_init(void) goto err_unregister_proto; }
+ vsock_bpf_build_proto(); + return 0;
err_unregister_proto: diff --git a/net/vmw_vsock/virtio_transport.c b/net/vmw_vsock/virtio_transport.c index 28b5a8e8e094..e95df847176b 100644 --- a/net/vmw_vsock/virtio_transport.c +++ b/net/vmw_vsock/virtio_transport.c @@ -457,6 +457,8 @@ static struct virtio_transport virtio_transport = { .notify_send_pre_enqueue = virtio_transport_notify_send_pre_enqueue, .notify_send_post_enqueue = virtio_transport_notify_send_post_enqueue, .notify_buffer_size = virtio_transport_notify_buffer_size, + + .read_skb = virtio_transport_read_skb, },
.send_pkt = virtio_transport_send_pkt, diff --git a/net/vmw_vsock/virtio_transport_common.c b/net/vmw_vsock/virtio_transport_common.c index 957cdc01c8e8..cb0748dc281b 100644 --- a/net/vmw_vsock/virtio_transport_common.c +++ b/net/vmw_vsock/virtio_transport_common.c @@ -1383,6 +1383,31 @@ int virtio_transport_purge_skbs(void *vsk, struct sk_buff_head *queue) } EXPORT_SYMBOL_GPL(virtio_transport_purge_skbs);
+int virtio_transport_read_skb(struct vsock_sock *vsk, skb_read_actor_t recv_actor) +{ + struct virtio_vsock_sock *vvs = vsk->trans; + struct sock *sk = sk_vsock(vsk); + struct sk_buff *skb; + int off = 0; + int copied; + int err; + + spin_lock_bh(&vvs->rx_lock); + /* Use __skb_recv_datagram() for race-free handling of the receive. It + * works for types other than dgrams. + */ + skb = __skb_recv_datagram(sk, &vvs->rx_queue, MSG_DONTWAIT, &off, &err); + spin_unlock_bh(&vvs->rx_lock); + + if (!skb) + return err; + + copied = recv_actor(sk, skb); + kfree_skb(skb); + return copied; +} +EXPORT_SYMBOL_GPL(virtio_transport_read_skb); + MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Asias He"); MODULE_DESCRIPTION("common code for virtio vsock"); diff --git a/net/vmw_vsock/vsock_bpf.c b/net/vmw_vsock/vsock_bpf.c new file mode 100644 index 000000000000..a3c97546ab84 --- /dev/null +++ b/net/vmw_vsock/vsock_bpf.c @@ -0,0 +1,174 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2022 Bobby Eshleman bobby.eshleman@bytedance.com + * + * Based off of net/unix/unix_bpf.c + */ + +#include <linux/bpf.h> +#include <linux/module.h> +#include <linux/skmsg.h> +#include <linux/socket.h> +#include <linux/wait.h> +#include <net/af_vsock.h> +#include <net/sock.h> + +#define vsock_sk_has_data(__sk, __psock) \ + ({ !skb_queue_empty(&(__sk)->sk_receive_queue) || \ + !skb_queue_empty(&(__psock)->ingress_skb) || \ + !list_empty(&(__psock)->ingress_msg); \ + }) + +static struct proto *vsock_prot_saved __read_mostly; +static DEFINE_SPINLOCK(vsock_prot_lock); +static struct proto vsock_bpf_prot; + +static bool vsock_has_data(struct sock *sk, struct sk_psock *psock) +{ + struct vsock_sock *vsk = vsock_sk(sk); + s64 ret; + + ret = vsock_connectible_has_data(vsk); + if (ret > 0) + return true; + + return vsock_sk_has_data(sk, psock); +} + +static bool vsock_msg_wait_data(struct sock *sk, struct sk_psock *psock, long timeo) +{ + bool ret; + + DEFINE_WAIT_FUNC(wait, woken_wake_function); + + if (sk->sk_shutdown & RCV_SHUTDOWN) + return true; + + if (!timeo) + return false; + + add_wait_queue(sk_sleep(sk), &wait); + sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk); + ret = vsock_has_data(sk, psock); + if (!ret) { + wait_woken(&wait, TASK_INTERRUPTIBLE, timeo); + ret = vsock_has_data(sk, psock); + } + sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk); + remove_wait_queue(sk_sleep(sk), &wait); + return ret; +} + +static int __vsock_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int flags) +{ + struct socket *sock = sk->sk_socket; + int err; + + if (sk->sk_type == SOCK_STREAM || sk->sk_type == SOCK_SEQPACKET) + err = vsock_connectible_recvmsg(sock, msg, len, flags); + else if (sk->sk_type == SOCK_DGRAM) + err = vsock_dgram_recvmsg(sock, msg, len, flags); + else + err = -EPROTOTYPE; + + return err; +} + +static int vsock_bpf_recvmsg(struct sock *sk, struct msghdr *msg, + size_t len, int flags, int *addr_len) +{ + struct sk_psock *psock; + int copied; + + psock = sk_psock_get(sk); + if (unlikely(!psock)) + return __vsock_recvmsg(sk, msg, len, flags); + + lock_sock(sk); + if (vsock_has_data(sk, psock) && sk_psock_queue_empty(psock)) { + release_sock(sk); + sk_psock_put(sk, psock); + return __vsock_recvmsg(sk, msg, len, flags); + } + + copied = sk_msg_recvmsg(sk, psock, msg, len, flags); + while (copied == 0) { + long timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); + + if (!vsock_msg_wait_data(sk, psock, timeo)) { + copied = -EAGAIN; + break; + } + + if (sk_psock_queue_empty(psock)) { + release_sock(sk); + sk_psock_put(sk, psock); + return __vsock_recvmsg(sk, msg, len, flags); + } + + copied = sk_msg_recvmsg(sk, psock, msg, len, flags); + } + + release_sock(sk); + sk_psock_put(sk, psock); + + return copied; +} + +/* Copy of original proto with updated sock_map methods */ +static struct proto vsock_bpf_prot = { + .close = sock_map_close, + .recvmsg = vsock_bpf_recvmsg, + .sock_is_readable = sk_msg_is_readable, + .unhash = sock_map_unhash, +}; + +static void vsock_bpf_rebuild_protos(struct proto *prot, const struct proto *base) +{ + *prot = *base; + prot->close = sock_map_close; + prot->recvmsg = vsock_bpf_recvmsg; + prot->sock_is_readable = sk_msg_is_readable; +} + +static void vsock_bpf_check_needs_rebuild(struct proto *ops) +{ + /* Paired with the smp_store_release() below. */ + if (unlikely(ops != smp_load_acquire(&vsock_prot_saved))) { + spin_lock_bh(&vsock_prot_lock); + if (likely(ops != vsock_prot_saved)) { + vsock_bpf_rebuild_protos(&vsock_bpf_prot, ops); + /* Make sure proto function pointers are updated before publishing the + * pointer to the struct. + */ + smp_store_release(&vsock_prot_saved, ops); + } + spin_unlock_bh(&vsock_prot_lock); + } +} + +int vsock_bpf_update_proto(struct sock *sk, struct sk_psock *psock, bool restore) +{ + struct vsock_sock *vsk; + + if (restore) { + sk->sk_write_space = psock->saved_write_space; + sock_replace_proto(sk, psock->sk_proto); + return 0; + } + + vsk = vsock_sk(sk); + if (!vsk->transport) + return -ENODEV; + + if (!vsk->transport->read_skb) + return -EOPNOTSUPP; + + vsock_bpf_check_needs_rebuild(psock->sk_proto); + sock_replace_proto(sk, &vsock_bpf_prot); + return 0; +} + +void __init vsock_bpf_build_proto(void) +{ + vsock_bpf_rebuild_protos(&vsock_bpf_prot, &vsock_proto); +} diff --git a/net/vmw_vsock/vsock_loopback.c b/net/vmw_vsock/vsock_loopback.c index 671e03240fc5..40753b661c13 100644 --- a/net/vmw_vsock/vsock_loopback.c +++ b/net/vmw_vsock/vsock_loopback.c @@ -94,6 +94,8 @@ static struct virtio_transport loopback_transport = { .notify_send_pre_enqueue = virtio_transport_notify_send_pre_enqueue, .notify_send_post_enqueue = virtio_transport_notify_send_post_enqueue, .notify_buffer_size = virtio_transport_notify_buffer_size, + + .read_skb = virtio_transport_read_skb, },
.send_pkt = vsock_loopback_send_pkt,
On Mon, Mar 27, 2023 at 07:11:51PM +0000, Bobby Eshleman wrote:
This patch adds sockmap support for vsock sockets. It is intended to be usable by all transports, but only the virtio and loopback transports are implemented.
SOCK_STREAM, SOCK_DGRAM, and SOCK_SEQPACKET are all supported.
Signed-off-by: Bobby Eshleman bobby.eshleman@bytedance.com Acked-by: Michael S. Tsirkin mst@redhat.com
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 | 64 ++++++++++-- net/vmw_vsock/virtio_transport.c | 2 + net/vmw_vsock/virtio_transport_common.c | 25 +++++ net/vmw_vsock/vsock_bpf.c | 174 ++++++++++++++++++++++++++++++++ net/vmw_vsock/vsock_loopback.c | 2 + 9 files changed, 281 insertions(+), 6 deletions(-)
LGTM!
Reviewed-by: Stefano Garzarella sgarzare@redhat.com
Thanks, Stefano
Add vsock loopback to the test kernel.
This allows sockmap for vsock to be tested.
Signed-off-by: Bobby Eshleman bobby.eshleman@bytedance.com Acked-by: Stefano Garzarella sgarzare@redhat.com --- tools/testing/selftests/bpf/config.aarch64 | 2 ++ tools/testing/selftests/bpf/config.s390x | 3 +++ tools/testing/selftests/bpf/config.x86_64 | 3 +++ 3 files changed, 8 insertions(+)
diff --git a/tools/testing/selftests/bpf/config.aarch64 b/tools/testing/selftests/bpf/config.aarch64 index 1f0437644186..253821494884 100644 --- a/tools/testing/selftests/bpf/config.aarch64 +++ b/tools/testing/selftests/bpf/config.aarch64 @@ -176,6 +176,8 @@ CONFIG_VIRTIO_MMIO_CMDLINE_DEVICES=y CONFIG_VIRTIO_MMIO=y CONFIG_VIRTIO_NET=y CONFIG_VIRTIO_PCI=y +CONFIG_VIRTIO_VSOCKETS_COMMON=y CONFIG_VLAN_8021Q=y CONFIG_VSOCKETS=y +CONFIG_VSOCKETS_LOOPBACK=y CONFIG_XFRM_USER=y diff --git a/tools/testing/selftests/bpf/config.s390x b/tools/testing/selftests/bpf/config.s390x index d49f6170e7bd..2ba92167be35 100644 --- a/tools/testing/selftests/bpf/config.s390x +++ b/tools/testing/selftests/bpf/config.s390x @@ -140,5 +140,8 @@ CONFIG_VIRTIO_BALLOON=y CONFIG_VIRTIO_BLK=y CONFIG_VIRTIO_NET=y CONFIG_VIRTIO_PCI=y +CONFIG_VIRTIO_VSOCKETS_COMMON=y CONFIG_VLAN_8021Q=y +CONFIG_VSOCKETS=y +CONFIG_VSOCKETS_LOOPBACK=y CONFIG_XFRM_USER=y diff --git a/tools/testing/selftests/bpf/config.x86_64 b/tools/testing/selftests/bpf/config.x86_64 index dd97d61d325c..b650b2e617b8 100644 --- a/tools/testing/selftests/bpf/config.x86_64 +++ b/tools/testing/selftests/bpf/config.x86_64 @@ -234,7 +234,10 @@ CONFIG_VIRTIO_BLK=y CONFIG_VIRTIO_CONSOLE=y CONFIG_VIRTIO_NET=y CONFIG_VIRTIO_PCI=y +CONFIG_VIRTIO_VSOCKETS_COMMON=y CONFIG_VLAN_8021Q=y +CONFIG_VSOCKETS=y +CONFIG_VSOCKETS_LOOPBACK=y CONFIG_X86_ACPI_CPUFREQ=y CONFIG_X86_CPUID=y CONFIG_X86_MSR=y
Add a test case testing the redirection from connectible AF_VSOCK sockets to connectible AF_UNIX sockets.
Signed-off-by: Bobby Eshleman bobby.eshleman@bytedance.com Acked-by: Stefano Garzarella sgarzare@redhat.com --- .../selftests/bpf/prog_tests/sockmap_listen.c | 163 +++++++++++++++++++++ 1 file changed, 163 insertions(+)
diff --git a/tools/testing/selftests/bpf/prog_tests/sockmap_listen.c b/tools/testing/selftests/bpf/prog_tests/sockmap_listen.c index 567e07c19ecc..8f09e1ea3ba7 100644 --- a/tools/testing/selftests/bpf/prog_tests/sockmap_listen.c +++ b/tools/testing/selftests/bpf/prog_tests/sockmap_listen.c @@ -18,6 +18,7 @@ #include <string.h> #include <sys/select.h> #include <unistd.h> +#include <linux/vm_sockets.h>
#include <bpf/bpf.h> #include <bpf/libbpf.h> @@ -251,6 +252,16 @@ static void init_addr_loopback6(struct sockaddr_storage *ss, socklen_t *len) *len = sizeof(*addr6); }
+static void init_addr_loopback_vsock(struct sockaddr_storage *ss, socklen_t *len) +{ + struct sockaddr_vm *addr = memset(ss, 0, sizeof(*ss)); + + addr->svm_family = AF_VSOCK; + addr->svm_port = VMADDR_PORT_ANY; + addr->svm_cid = VMADDR_CID_LOCAL; + *len = sizeof(*addr); +} + static void init_addr_loopback(int family, struct sockaddr_storage *ss, socklen_t *len) { @@ -261,6 +272,9 @@ static void init_addr_loopback(int family, struct sockaddr_storage *ss, case AF_INET6: init_addr_loopback6(ss, len); return; + case AF_VSOCK: + init_addr_loopback_vsock(ss, len); + return; default: FAIL("unsupported address family %d", family); } @@ -1478,6 +1492,8 @@ static const char *family_str(sa_family_t family) return "IPv6"; case AF_UNIX: return "Unix"; + case AF_VSOCK: + return "VSOCK"; default: return "unknown"; } @@ -1689,6 +1705,151 @@ static void test_unix_redir(struct test_sockmap_listen *skel, struct bpf_map *ma unix_skb_redir_to_connected(skel, map, sotype); }
+/* Returns two connected loopback vsock sockets */ +static int vsock_socketpair_connectible(int sotype, int *v0, int *v1) +{ + struct sockaddr_storage addr; + socklen_t len = sizeof(addr); + int s, p, c; + + s = socket_loopback(AF_VSOCK, sotype); + if (s < 0) + return -1; + + c = xsocket(AF_VSOCK, sotype | SOCK_NONBLOCK, 0); + if (c == -1) + goto close_srv; + + if (getsockname(s, sockaddr(&addr), &len) < 0) + goto close_cli; + + if (connect(c, sockaddr(&addr), len) < 0 && errno != EINPROGRESS) { + FAIL_ERRNO("connect"); + goto close_cli; + } + + len = sizeof(addr); + p = accept_timeout(s, sockaddr(&addr), &len, IO_TIMEOUT_SEC); + if (p < 0) + goto close_cli; + + *v0 = p; + *v1 = c; + + return 0; + +close_cli: + close(c); +close_srv: + close(s); + + return -1; +} + +static void vsock_unix_redir_connectible(int sock_mapfd, int verd_mapfd, + enum redir_mode mode, int sotype) +{ + const char *log_prefix = redir_mode_str(mode); + char a = 'a', b = 'b'; + int u0, u1, v0, v1; + int sfd[2]; + unsigned int pass; + int err, n; + u32 key; + + zero_verdict_count(verd_mapfd); + + if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_NONBLOCK, 0, sfd)) + return; + + u0 = sfd[0]; + u1 = sfd[1]; + + err = vsock_socketpair_connectible(sotype, &v0, &v1); + if (err) { + FAIL("vsock_socketpair_connectible() failed"); + goto close_uds; + } + + err = add_to_sockmap(sock_mapfd, u0, v0); + if (err) { + FAIL("add_to_sockmap failed"); + goto close_vsock; + } + + n = write(v1, &a, sizeof(a)); + if (n < 0) + FAIL_ERRNO("%s: write", log_prefix); + if (n == 0) + FAIL("%s: incomplete write", log_prefix); + if (n < 1) + goto out; + + n = recv(mode == REDIR_INGRESS ? u0 : u1, &b, sizeof(b), MSG_DONTWAIT); + if (n < 0) + FAIL("%s: recv() err, errno=%d", log_prefix, errno); + if (n == 0) + FAIL("%s: incomplete recv", log_prefix); + if (b != a) + FAIL("%s: vsock socket map failed, %c != %c", log_prefix, a, b); + + key = SK_PASS; + err = xbpf_map_lookup_elem(verd_mapfd, &key, &pass); + if (err) + goto out; + if (pass != 1) + FAIL("%s: want pass count 1, have %d", log_prefix, pass); +out: + key = 0; + bpf_map_delete_elem(sock_mapfd, &key); + key = 1; + bpf_map_delete_elem(sock_mapfd, &key); + +close_vsock: + close(v0); + close(v1); + +close_uds: + close(u0); + close(u1); +} + +static void vsock_unix_skb_redir_connectible(struct test_sockmap_listen *skel, + struct bpf_map *inner_map, + int sotype) +{ + int verdict = bpf_program__fd(skel->progs.prog_skb_verdict); + int verdict_map = bpf_map__fd(skel->maps.verdict_map); + int sock_map = bpf_map__fd(inner_map); + int err; + + err = xbpf_prog_attach(verdict, sock_map, BPF_SK_SKB_VERDICT, 0); + if (err) + return; + + skel->bss->test_ingress = false; + vsock_unix_redir_connectible(sock_map, verdict_map, REDIR_EGRESS, sotype); + skel->bss->test_ingress = true; + vsock_unix_redir_connectible(sock_map, verdict_map, REDIR_INGRESS, sotype); + + xbpf_prog_detach2(verdict, sock_map, BPF_SK_SKB_VERDICT); +} + +static void test_vsock_redir(struct test_sockmap_listen *skel, struct bpf_map *map) +{ + const char *family_name, *map_name; + char s[MAX_TEST_NAME]; + + family_name = family_str(AF_VSOCK); + map_name = map_type_str(map); + snprintf(s, sizeof(s), "%s %s %s", map_name, family_name, __func__); + if (!test__start_subtest(s)) + return; + + vsock_unix_skb_redir_connectible(skel, map, SOCK_STREAM); + vsock_unix_skb_redir_connectible(skel, map, SOCK_SEQPACKET); +} + static void test_reuseport(struct test_sockmap_listen *skel, struct bpf_map *map, int family, int sotype) { @@ -2060,12 +2221,14 @@ void serial_test_sockmap_listen(void) run_tests(skel, skel->maps.sock_map, AF_INET6); test_unix_redir(skel, skel->maps.sock_map, SOCK_DGRAM); test_unix_redir(skel, skel->maps.sock_map, SOCK_STREAM); + test_vsock_redir(skel, skel->maps.sock_map);
skel->bss->test_sockmap = false; run_tests(skel, skel->maps.sock_hash, AF_INET); run_tests(skel, skel->maps.sock_hash, AF_INET6); test_unix_redir(skel, skel->maps.sock_hash, SOCK_DGRAM); test_unix_redir(skel, skel->maps.sock_hash, SOCK_STREAM); + test_vsock_redir(skel, skel->maps.sock_hash);
test_sockmap_listen__destroy(skel); }
Hello:
This series was applied to netdev/net-next.git (main) by David S. Miller davem@davemloft.net:
On Mon, 27 Mar 2023 19:11:50 +0000 you wrote:
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.
[...]
Here is the summary with links: - [net-next,v4,1/3] vsock: support sockmap https://git.kernel.org/netdev/net-next/c/634f1a7110b4 - [net-next,v4,2/3] selftests/bpf: add vsock to vmtest.sh https://git.kernel.org/netdev/net-next/c/c7c605c982d6 - [net-next,v4,3/3] selftests/bpf: add a test case for vsock sockmap https://git.kernel.org/netdev/net-next/c/d61bd8c1fd02
You are awesome, thank you!
Bobby Eshleman wrote:
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.
Appears reasonable to me although I didn't review internals of all the af_vsock stuff. I see it got merged great.
One nit, I have a series coming shortly to pull the tests out of the sockmap_listen and into a sockmap_vsock because I don't think they belong in _listen but that is just a refactor.
On Fri, Mar 31, 2023 at 06:06:10PM -0700, John Fastabend wrote:
Bobby Eshleman wrote:
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.
Appears reasonable to me although I didn't review internals of all the af_vsock stuff. I see it got merged great.
Thanks for checking!
One nit, I have a series coming shortly to pull the tests out of the sockmap_listen and into a sockmap_vsock because I don't think they belong in _listen but that is just a refactor.
LGTM!
Thanks, Stefano
linux-kselftest-mirror@lists.linaro.org
-
Bobby Eshleman -
John Fastabend -
patchwork-bot+netdevbpf＠kernel.org -
Stefano Garzarella