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[73.164.155.12]) by smtp.gmail.com with ESMTPSA id t13-20020a17090a3b4d00b002132f3e71c6sm1724948pjf.52.2023.01.18.12.29.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Jan 2023 12:29:24 -0800 (PST) From: Bobby Eshleman Date: Wed, 18 Jan 2023 12:27:39 -0800 Subject: [PATCH RFC 1/3] vsock: support sockmap MIME-Version: 1.0 Message-Id: <20230118-support-vsock-sockmap-connectible-v1-1-d47e6294827b@bytedance.com> References: <20230118-support-vsock-sockmap-connectible-v1-0-d47e6294827b@bytedance.com> In-Reply-To: <20230118-support-vsock-sockmap-connectible-v1-0-d47e6294827b@bytedance.com> To: Stefan Hajnoczi , Stefano Garzarella , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Andrii Nakryiko , Mykola Lysenko , Alexei Starovoitov , Daniel Borkmann , Martin KaFai Lau , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Jiri Olsa , Shuah Khan Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org, Bobby Eshleman , Cong Wang X-Mailer: b4 0.11.2 X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1755393770339364927?= X-GMAIL-MSGID: =?utf-8?q?1755393770339364927?= This patch adds sockmap support for vsock sockets. It is intended to be usable by all transports, but only the virtio transport is implemented. Signed-off-by: Bobby Eshleman --- 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 | 59 +++++++++-- net/vmw_vsock/virtio_transport.c | 2 + net/vmw_vsock/virtio_transport_common.c | 22 ++++ net/vmw_vsock/vsock_bpf.c | 180 ++++++++++++++++++++++++++++++++ net/vmw_vsock/vsock_loopback.c | 2 + 9 files changed, 279 insertions(+), 6 deletions(-) diff --git a/drivers/vhost/vsock.c b/drivers/vhost/vsock.c index 1f3b89c885cca..3c6dc036b9044 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 3f9c166113063..c58453699ee98 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 568a87c5e0d0f..a73f5fbd296af 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 6a943ec95c4a5..5da74c4a9f1d1 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 d593d5b6d4b15..7081b3a992c1e 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 +1135,19 @@ 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); + + if (!vsk->transport) + return -ENODEV; + + if (!vsk->transport->read_skb) + return -EOPNOTSUPP; + + return vsk->transport->read_skb(vsk, read_actor); +} + static int vsock_dgram_sendmsg(struct socket *sock, struct msghdr *msg, size_t len) { @@ -1241,19 +1258,32 @@ static int vsock_dgram_connect(struct socket *sock, memcpy(&vsk->remote_addr, remote_addr, sizeof(vsk->remote_addr)); sock->state = SS_CONNECTED; + 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); + const struct proto *prot; + 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 +1302,7 @@ 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) @@ -2085,13 +2116,16 @@ 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; @@ -2138,6 +2172,14 @@ 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 @@ -2147,6 +2189,7 @@ 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) { @@ -2187,6 +2230,7 @@ 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 = { @@ -2208,6 +2252,7 @@ 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, @@ -2347,6 +2392,8 @@ 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 28b5a8e8e0948..e95df847176b6 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 a1581c77cf84a..9a87ead5b1fc5 100644 --- a/net/vmw_vsock/virtio_transport_common.c +++ b/net/vmw_vsock/virtio_transport_common.c @@ -1388,6 +1388,28 @@ 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 copied = 0; + int off = 0; + int err; + + spin_lock_bh(&vvs->rx_lock); + 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 0000000000000..9e11282d3bc1f --- /dev/null +++ b/net/vmw_vsock/vsock_bpf.c @@ -0,0 +1,180 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2022 Bobby Eshleman + * + * Based off of net/unix/unix_bpf.c + */ + +#include +#include +#include +#include +#include +#include + +#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_dgram_prot_saved __read_mostly; +static DEFINE_SPINLOCK(vsock_dgram_prot_lock); +static struct proto vsock_dgram_bpf_prot; + +static bool vsock_has_data(struct vsock_sock *vsk, struct sk_psock *psock) +{ + struct sock *sk = sk_vsock(vsk); + s64 ret; + + ret = vsock_connectible_has_data(vsk); + if (ret > 0) + return true; + + return vsock_sk_has_data(sk, psock); +} + +static int vsock_msg_wait_data(struct sock *sk, struct sk_psock *psock, long timeo) +{ + struct vsock_sock *vsk; + int err; + + DEFINE_WAIT(wait); + + vsk = vsock_sk(sk); + err = 0; + + while (vsock_has_data(vsk, psock)) { + prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); + + if (sk->sk_err != 0 || + (sk->sk_shutdown & RCV_SHUTDOWN) || + (vsk->peer_shutdown & SEND_SHUTDOWN)) { + break; + } + + if (timeo == 0) { + err = -EAGAIN; + break; + } + + release_sock(sk); + timeo = schedule_timeout(timeo); + lock_sock(sk); + + if (signal_pending(current)) { + err = sock_intr_errno(timeo); + break; + } else if (timeo == 0) { + err = -EAGAIN; + break; + } + } + + finish_wait(sk_sleep(sk), &wait); + + if (err) + return err; + + return 0; +} + +static int vsock_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int flags) +{ + int err; + struct socket *sock = sk->sk_socket; + + if (sk->sk_type == SOCK_STREAM || sk->sk_type == SOCK_SEQPACKET) + err = vsock_connectible_recvmsg(sock, msg, len, flags); + else + err = vsock_dgram_recvmsg(sock, msg, len, flags); + + return err; +} + +static int vsock_bpf_recvmsg(struct sock *sk, struct msghdr *msg, + size_t len, int flags, int *addr_len) +{ + int copied; + struct sk_psock *psock; + + lock_sock(sk); + psock = sk_psock_get(sk); + if (unlikely(!psock)) { + release_sock(sk); + return vsock_recvmsg(sk, msg, len, flags); + } + + if (vsock_has_data(vsock_sk(sk), psock) && sk_psock_queue_empty(psock)) { + sk_psock_put(sk, psock); + release_sock(sk); + return vsock_recvmsg(sk, msg, len, flags); + } + +msg_bytes_ready: + copied = sk_msg_recvmsg(sk, psock, msg, len, flags); + if (!copied) { + long timeo; + int data; + + timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); + data = vsock_msg_wait_data(sk, psock, timeo); + if (data) { + if (!sk_psock_queue_empty(psock)) + goto msg_bytes_ready; + sk_psock_put(sk, psock); + release_sock(sk); + return vsock_recvmsg(sk, msg, len, flags); + } + copied = -EAGAIN; + } + sk_psock_put(sk, psock); + release_sock(sk); + + return copied; +} + +/* Copy of original proto with updated sock_map methods */ +static struct proto vsock_dgram_bpf_prot = { + .close = sock_map_close, + .recvmsg = vsock_bpf_recvmsg, + .sock_is_readable = sk_msg_is_readable, + .unhash = sock_map_unhash, +}; + +static void vsock_dgram_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_dgram_bpf_check_needs_rebuild(struct proto *ops) +{ + if (unlikely(ops != smp_load_acquire(&vsock_dgram_prot_saved))) { + spin_lock_bh(&vsock_dgram_prot_lock); + if (likely(ops != vsock_dgram_prot_saved)) { + vsock_dgram_bpf_rebuild_protos(&vsock_dgram_bpf_prot, ops); + smp_store_release(&vsock_dgram_prot_saved, ops); + } + spin_unlock_bh(&vsock_dgram_prot_lock); + } +} + +int vsock_bpf_update_proto(struct sock *sk, struct sk_psock *psock, bool restore) +{ + if (restore) { + sk->sk_write_space = psock->saved_write_space; + sock_replace_proto(sk, psock->sk_proto); + return 0; + } + + vsock_dgram_bpf_check_needs_rebuild(psock->sk_proto); + sock_replace_proto(sk, &vsock_dgram_bpf_prot); + return 0; +} + +void __init vsock_bpf_build_proto(void) +{ + vsock_dgram_bpf_rebuild_protos(&vsock_dgram_bpf_prot, &vsock_proto); +} diff --git a/net/vmw_vsock/vsock_loopback.c b/net/vmw_vsock/vsock_loopback.c index 671e03240fc52..40753b661c135 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, From patchwork Wed Jan 18 20:27:40 2023 Content-Type: text/plain; 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[73.164.155.12]) by smtp.gmail.com with ESMTPSA id t13-20020a17090a3b4d00b002132f3e71c6sm1724948pjf.52.2023.01.18.12.29.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Jan 2023 12:29:25 -0800 (PST) From: Bobby Eshleman Date: Wed, 18 Jan 2023 12:27:40 -0800 Subject: [PATCH RFC 2/3] selftests/bpf: add vsock to vmtest.sh MIME-Version: 1.0 Message-Id: <20230118-support-vsock-sockmap-connectible-v1-2-d47e6294827b@bytedance.com> References: <20230118-support-vsock-sockmap-connectible-v1-0-d47e6294827b@bytedance.com> In-Reply-To: <20230118-support-vsock-sockmap-connectible-v1-0-d47e6294827b@bytedance.com> To: Stefan Hajnoczi , Stefano Garzarella , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Andrii Nakryiko , Mykola Lysenko , Alexei Starovoitov , Daniel Borkmann , Martin KaFai Lau , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Jiri Olsa , Shuah Khan Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org, Bobby Eshleman , Cong Wang X-Mailer: b4 0.11.2 X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1755393762506584861?= X-GMAIL-MSGID: =?utf-8?q?1755393762506584861?= Add the ability to use vsock in the vmtest.sh script and the test kernel config. Signed-off-by: Bobby Eshleman --- tools/testing/selftests/bpf/config.x86_64 | 4 ++++ tools/testing/selftests/bpf/vmtest.sh | 1 + 2 files changed, 5 insertions(+) diff --git a/tools/testing/selftests/bpf/config.x86_64 b/tools/testing/selftests/bpf/config.x86_64 index dd97d61d325ca..db5e6b9a91711 100644 --- a/tools/testing/selftests/bpf/config.x86_64 +++ b/tools/testing/selftests/bpf/config.x86_64 @@ -234,7 +234,11 @@ CONFIG_VIRTIO_BLK=y CONFIG_VIRTIO_CONSOLE=y CONFIG_VIRTIO_NET=y CONFIG_VIRTIO_PCI=y +CONFIG_VIRTIO_VSOCKETS=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 diff --git a/tools/testing/selftests/bpf/vmtest.sh b/tools/testing/selftests/bpf/vmtest.sh index 316a56d680f25..aad27ffd4ec68 100755 --- a/tools/testing/selftests/bpf/vmtest.sh +++ b/tools/testing/selftests/bpf/vmtest.sh @@ -250,6 +250,7 @@ EOF -enable-kvm \ -m 4G \ -drive file="${rootfs_img}",format=raw,index=1,media=disk,if=virtio,cache=none \ + -device vhost-vsock-pci,guest-cid=1234 \ -kernel "${kernel_bzimage}" \ -append "root=/dev/vda rw console=${QEMU_CONSOLE}" } From patchwork Wed Jan 18 20:27:41 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bobby Eshleman X-Patchwork-Id: 45475 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:adf:eb09:0:0:0:0:0 with SMTP id s9csp2548584wrn; Wed, 18 Jan 2023 12:32:37 -0800 (PST) X-Google-Smtp-Source: AMrXdXvEsJshrq7Awd1NM8EJQTiXfy6w8pURctceiPJsarOedUzvDsDSpamEZiqIcVyYUCmxKlyn X-Received: by 2002:a17:902:b713:b0:194:3fa4:3f46 with SMTP id d19-20020a170902b71300b001943fa43f46mr7962031pls.29.1674073957402; Wed, 18 Jan 2023 12:32:37 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1674073957; cv=none; d=google.com; s=arc-20160816; b=gu5OUKJwL/lbsce9QKXJdQ5mm1iip3LEwRd4PW1Bn1wazuz8gARkUUETp7SDBEwUC0 9V/G12D/hm5HbTtW0hqgMPWjlKS0fJaEM59C2ONmQhppmF0550M9jFFebh3P2ZLBskkQ QvdqnOWT4Dyji577kkFcvoU4WLWMzPsDFd2kWkfLQnhWyc+1AYs9BagE6QH4JbeWtm8g ObZ2cYbIqpn1JE98BbJcuE8jVNUGSHVyh6P990eO7VlyaBdzPrMisR7K08fbx0gV7Ipu +0pgM/3K9HH/e6eUaEBU4nwJwFTqVQ1FkDAFfklN+hac0H9z1L4ebafNQjCqToDomnNV eiiQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:cc:to:in-reply-to:references:message-id :content-transfer-encoding:mime-version:subject:date:from :dkim-signature; bh=G3SSHfwD1JWrYtYUVCovQ7Td7i1weIvYDlK0fNQrT54=; b=ZUHXc2M2fyYU6jF9tGcwIwT5oy79/coOEKPSq6V70QMCpblzAH++7cn4eRUha9PaR6 6pcqvny+tADgCRt5hrwwOqu31tfGfm5//D9csYStp7VqtDDe1fHDUJzaHq2XK2Ravzon JsgwRrcjtwlTsTCDszAM9cAlGqx1E5ioPPeaI9UsUdbXT4G5eSNJWWA84rCEr7m7mdip 6ILVMt4paI8KeC26nHcktoS+rkp9+hqO7cn3Cz1oYgoeP64n32U0EG8z4JuyszDuTUKm MWLmDMYg3IZnAdu0Bpd8A9NPkgXGU+Yr8EGwdEEB59BlFUn76KUbBkdr7ExrZzD9FT0H gYMg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@bytedance-com.20210112.gappssmtp.com header.s=20210112 header.b=lqiHRIGe; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=bytedance.com Received: from out1.vger.email (out1.vger.email. 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[73.164.155.12]) by smtp.gmail.com with ESMTPSA id t13-20020a17090a3b4d00b002132f3e71c6sm1724948pjf.52.2023.01.18.12.29.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Jan 2023 12:29:26 -0800 (PST) From: Bobby Eshleman Date: Wed, 18 Jan 2023 12:27:41 -0800 Subject: [PATCH RFC 3/3] selftests/bpf: Add a test case for vsock sockmap MIME-Version: 1.0 Message-Id: <20230118-support-vsock-sockmap-connectible-v1-3-d47e6294827b@bytedance.com> References: <20230118-support-vsock-sockmap-connectible-v1-0-d47e6294827b@bytedance.com> In-Reply-To: <20230118-support-vsock-sockmap-connectible-v1-0-d47e6294827b@bytedance.com> To: Stefan Hajnoczi , Stefano Garzarella , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Andrii Nakryiko , Mykola Lysenko , Alexei Starovoitov , Daniel Borkmann , Martin KaFai Lau , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Jiri Olsa , Shuah Khan Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org, Bobby Eshleman , Cong Wang X-Mailer: b4 0.11.2 X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1755393774384788732?= X-GMAIL-MSGID: =?utf-8?q?1755393774384788732?= Add a test case testing the redirection from connectible AF_VSOCK sockets to connectible AF_UNIX sockets. Signed-off-by: Bobby Eshleman --- .../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 2cf0c7a3fe232..8b5a2e09c9ede 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 #include #include +#include #include #include @@ -249,6 +250,16 @@ 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) { @@ -259,6 +270,9 @@ 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); } @@ -1434,6 +1448,8 @@ static const char *family_str(sa_family_t family) return "IPv6"; case AF_UNIX: return "Unix"; + case AF_VSOCK: + return "VSOCK"; default: return "unknown"; } @@ -1644,6 +1660,151 @@ 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) { @@ -2015,12 +2176,14 @@ 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); }