From patchwork Fri Aug 23 21:19:01 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jon Maloy X-Patchwork-Id: 13776037 X-Patchwork-Delegate: kuba@kernel.org Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7DE2A1C8235 for ; Fri, 23 Aug 2024 21:19:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724447959; cv=none; b=j3Ow5jhYhhwuvQj+xc9fVpSNi8RcTyszmDA7u8xDZaF9Lo5ctXZF1/xNpgNdQtBmxLWfVYcPUnx3PYd3ZxlI5rWtveaf0TV433eY2k93McWmJn/XmJp/3L+ghLKTMgcLDqvKNnKdJkGoYz14kffIdWvDvBg//JYlB8MSz2ew0qs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724447959; c=relaxed/simple; bh=ra8d8mvAcL8zhdIyJ5ZY8A8nQDUJTO7T4BHUPzwU9ds=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=LcgbaKUn/u38zzQsisUbRXxyuDpjywIfmxhxwd29D3GM4QmSpkRXwvpVQLZ20YkVMFlrL44jwT6Zf7VDvQWiRLsO5R8rR/Vqhm432Z+ZWL7TSTaezvqp3AKkip2zzBaCu802Tme9A8kLFS5vUj/XOx2WiWkaodLaByhJW7yKIbg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=M+Vr4Ni5; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="M+Vr4Ni5" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1724447955; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=kDg8aTq0+IRJ2YG0WKlzlK9QrxdK9WrqE2P+1a17Yps=; b=M+Vr4Ni5qAowcoCfuTvPfoNi2G/K4rrAccKPrZ/5G0ngxZ8yRL5DWszAu2RqLdCJol4FUw flXSjtxwcR+daYtROFiQh1xlyxUgrGnspqvzY9Mgrw24ug+DTsU5yRW8YAXoRl/98KpIkj /UgIngUt+AMnIp5fWYsETzywj+ieTF4= Received: from mx-prod-mc-04.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-111-ZecDWR2RMYamaS2s9CdeFg-1; Fri, 23 Aug 2024 17:19:12 -0400 X-MC-Unique: ZecDWR2RMYamaS2s9CdeFg-1 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 089C419560A2; Fri, 23 Aug 2024 21:19:11 +0000 (UTC) Received: from jmaloy-thinkpadp16vgen1.rmtcaqc.csb (unknown [10.22.8.17]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 089B33002246; Fri, 23 Aug 2024 21:19:07 +0000 (UTC) From: jmaloy@redhat.com To: netdev@vger.kernel.org, linux-kselftest@vger.kernel.org, davem@davemloft.net Cc: kuba@kernel.org, passt-dev@passt.top, jmaloy@redhat.com, sbrivio@redhat.com, lvivier@redhat.com, dgibson@redhat.com, eric.dumazet@gmail.com, edumazet@google.com Subject: [PATCH 1/2] tcp: add SO_PEEK_OFF socket option tor TCPv6 Date: Fri, 23 Aug 2024 17:19:01 -0400 Message-ID: <20240823211902.143210-2-jmaloy@redhat.com> In-Reply-To: <20240823211902.143210-1-jmaloy@redhat.com> References: <20240823211902.143210-1-jmaloy@redhat.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 X-Patchwork-Delegate: kuba@kernel.org From: Jon Maloy When we added the SO_PEEK_OFF socket option to TCP we forgot to add it even for TCP on IPv6. We do that here. Fixes: 05ea491641d3 ("tcp: add support for SO_PEEK_OFF socket option") Reviewed-by: David Gibson Reviewed-by: Stefano Brivio Tested-by: Stefano Brivio Signed-off-by: Jon Maloy Reviewed-by: Jason Xing Reviewed-by: Eric Dumazet --- net/ipv6/af_inet6.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c index 90d2c7e3f5e9..ba69b86f1c7d 100644 --- a/net/ipv6/af_inet6.c +++ b/net/ipv6/af_inet6.c @@ -708,6 +708,7 @@ const struct proto_ops inet6_stream_ops = { .splice_eof = inet_splice_eof, .sendmsg_locked = tcp_sendmsg_locked, .splice_read = tcp_splice_read, + .set_peek_off = sk_set_peek_off, .read_sock = tcp_read_sock, .read_skb = tcp_read_skb, .peek_len = tcp_peek_len, From patchwork Fri Aug 23 21:19:02 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jon Maloy X-Patchwork-Id: 13776038 X-Patchwork-Delegate: kuba@kernel.org Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 31B151C8259 for ; 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Fri, 23 Aug 2024 17:19:16 -0400 X-MC-Unique: dkZpodcmNRmOK5PgT_ZrHQ-1 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 67D4919560AD; Fri, 23 Aug 2024 21:19:14 +0000 (UTC) Received: from jmaloy-thinkpadp16vgen1.rmtcaqc.csb (unknown [10.22.8.17]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 4887B300019C; Fri, 23 Aug 2024 21:19:11 +0000 (UTC) From: jmaloy@redhat.com To: netdev@vger.kernel.org, linux-kselftest@vger.kernel.org, davem@davemloft.net Cc: kuba@kernel.org, passt-dev@passt.top, jmaloy@redhat.com, sbrivio@redhat.com, lvivier@redhat.com, dgibson@redhat.com, eric.dumazet@gmail.com, edumazet@google.com Subject: [PATCH 2/2] selftests: add selftest for tcp SO_PEEK_OFF support Date: Fri, 23 Aug 2024 17:19:02 -0400 Message-ID: <20240823211902.143210-3-jmaloy@redhat.com> In-Reply-To: <20240823211902.143210-1-jmaloy@redhat.com> References: <20240823211902.143210-1-jmaloy@redhat.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 X-Patchwork-Delegate: kuba@kernel.org From: Jon Maloy We add a selftest to check that the new feature added in commit 05ea491641d3 ("tcp: add support for SO_PEEK_OFF socket option") works correctly. Reviewed-by: Stefano Brivio Tested-by: Stefano Brivio Signed-off-by: Jon Maloy --- tools/testing/selftests/net/Makefile | 1 + tools/testing/selftests/net/tcp_so_peek_off.c | 181 ++++++++++++++++++ 2 files changed, 182 insertions(+) create mode 100644 tools/testing/selftests/net/tcp_so_peek_off.c diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile index 8eaffd7a641c..1179e3261bef 100644 --- a/tools/testing/selftests/net/Makefile +++ b/tools/testing/selftests/net/Makefile @@ -80,6 +80,7 @@ TEST_PROGS += io_uring_zerocopy_tx.sh TEST_GEN_FILES += bind_bhash TEST_GEN_PROGS += sk_bind_sendto_listen TEST_GEN_PROGS += sk_connect_zero_addr +TEST_GEN_PROGS += tcp_so_peek_off TEST_PROGS += test_ingress_egress_chaining.sh TEST_GEN_PROGS += so_incoming_cpu TEST_PROGS += sctp_vrf.sh diff --git a/tools/testing/selftests/net/tcp_so_peek_off.c b/tools/testing/selftests/net/tcp_so_peek_off.c new file mode 100644 index 000000000000..8379ea02e3d7 --- /dev/null +++ b/tools/testing/selftests/net/tcp_so_peek_off.c @@ -0,0 +1,181 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include +#include +#include +#include +#include +#include +#include +#include +#include "../kselftest.h" + +static char *afstr(int af) +{ + return af == AF_INET ? "TCP/IPv4" : "TCP/IPv6"; +} + +int tcp_peek_offset_probe(sa_family_t af) +{ + int optv = 0; + int ret = 0; + int s; + + s = socket(af, SOCK_STREAM | SOCK_CLOEXEC, IPPROTO_TCP); + if (s < 0) { + ksft_perror("Temporary TCP socket creation failed"); + } else { + if (!setsockopt(s, SOL_SOCKET, SO_PEEK_OFF, &optv, sizeof(int))) + ret = 1; + else + printf("%s does not support SO_PEEK_OFF\n", afstr(af)); + close(s); + } + return ret; +} + +static void tcp_peek_offset_set(int s, int offset) +{ + if (setsockopt(s, SOL_SOCKET, SO_PEEK_OFF, &offset, sizeof(offset))) + ksft_perror("Failed to set SO_PEEK_OFF value\n"); +} + +static int tcp_peek_offset_get(int s) +{ + int offset; + socklen_t len = sizeof(offset); + + if (getsockopt(s, SOL_SOCKET, SO_PEEK_OFF, &offset, &len)) + ksft_perror("Failed to get SO_PEEK_OFF value\n"); + return offset; +} + +static int tcp_peek_offset_test(sa_family_t af) +{ + union { + struct sockaddr sa; + struct sockaddr_in a4; + struct sockaddr_in6 a6; + } a; + int res = 0; + int s[2] = {0, 0}; + int recv_sock = 0; + int offset = 0; + ssize_t len; + char buf; + + memset(&a, 0, sizeof(a)); + a.sa.sa_family = af; + + s[0] = socket(af, SOCK_STREAM, IPPROTO_TCP); + s[1] = socket(af, SOCK_STREAM | SOCK_NONBLOCK, IPPROTO_TCP); + + if (s[0] < 0 || s[1] < 0) { + ksft_perror("Temporary probe socket creation failed\n"); + goto out; + } + if (bind(s[0], &a.sa, sizeof(a)) < 0) { + ksft_perror("Temporary probe socket bind() failed\n"); + goto out; + } + if (getsockname(s[0], &a.sa, &((socklen_t) { sizeof(a) })) < 0) { + ksft_perror("Temporary probe socket getsockname() failed\n"); + goto out; + } + if (listen(s[0], 0) < 0) { + ksft_perror("Temporary probe socket listen() failed\n"); + goto out; + } + if (connect(s[1], &a.sa, sizeof(a)) >= 0 || errno != EINPROGRESS) { + ksft_perror("Temporary probe socket connect() failed\n"); + goto out; + } + recv_sock = accept(s[0], NULL, NULL); + if (recv_sock <= 0) { + ksft_perror("Temporary probe socket accept() failed\n"); + goto out; + } + + /* Some basic tests of getting/setting offset */ + offset = tcp_peek_offset_get(recv_sock); + if (offset != -1) { + ksft_perror("Initial value of socket offset not -1\n"); + goto out; + } + tcp_peek_offset_set(recv_sock, 0); + offset = tcp_peek_offset_get(recv_sock); + if (offset != 0) { + ksft_perror("Failed to set socket offset to 0\n"); + goto out; + } + + /* Transfer a message */ + if (send(s[1], (char *)("ab"), 2, 0) <= 0 || errno != EINPROGRESS) { + ksft_perror("Temporary probe socket send() failed\n"); + goto out; + } + /* Read first byte */ + len = recv(recv_sock, &buf, 1, MSG_PEEK); + if (len != 1 || buf != 'a') { + ksft_perror("Failed to read first byte of message\n"); + goto out; + } + offset = tcp_peek_offset_get(recv_sock); + if (offset != 1) { + ksft_perror("Offset not forwarded correctly at first byte\n"); + goto out; + } + /* Try to read beyond last byte */ + len = recv(recv_sock, &buf, 2, MSG_PEEK); + if (len != 1 || buf != 'b') { + ksft_perror("Failed to read last byte of message\n"); + goto out; + } + offset = tcp_peek_offset_get(recv_sock); + if (offset != 2) { + ksft_perror("Offset not forwarded correctly at last byte\n"); + goto out; + } + /* Flush message */ + len = recv(recv_sock, NULL, 2, MSG_TRUNC); + if (len != 2) { + ksft_perror("Failed to flush message\n"); + goto out; + } + offset = tcp_peek_offset_get(recv_sock); + if (offset != 0) { + ksft_perror("Offset not reverted correctly after flush\n"); + goto out; + } + + printf("%s with MSG_PEEK_OFF works correctly\n", afstr(af)); + res = 1; +out: + close(recv_sock); + close(s[1]); + close(s[0]); + return res; +} + +int main(void) +{ + int res4, res6; + + res4 = tcp_peek_offset_probe(AF_INET); + res6 = tcp_peek_offset_probe(AF_INET6); + + if (!res4 && !res6) + return KSFT_SKIP; + + if (res4) + res4 = tcp_peek_offset_test(AF_INET); + + if (res6) + res6 = tcp_peek_offset_test(AF_INET6); + + if (!res4 || !res6) + return KSFT_FAIL; + + return KSFT_PASS; +} +