From patchwork Wed Apr 10 06:13:31 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geliang Tang X-Patchwork-Id: 13623601 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 8828A2206C; Wed, 10 Apr 2024 06:14:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712729646; cv=none; b=NXYNmFWyfc90TMrVgd5TwSItTYijjT1N1NP62aGmv6wsN839a4IrMvaN4ZoC8el3eTPyngiMWaXaYRA3RxCz9dYSXhkj/YYrv05I9WWtLVpXKbgCmMr9dTE7p0npKPAn1CoJ2+kPT728kj2CdCRXMRgQ7e4McIM+wJW0dVOCSS4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712729646; c=relaxed/simple; bh=bDa3Vcz6I4Pm6HBOcI4duaKWHOWwh5YyRDPmIvGlPB0=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=YGqciXWVDpkcAtmMvrnSmZ/yOftMuq6LplP3pT/XUV+qWwRtPPolxoIsITrh53ZwHRkBr3L9V1l00h4fxAtRHHzelt4Wf6gCco0tBOj509egAkyQtqCdi1GBnzKZwBCowvioUKjMsfKqcd6YeLWsXN6pHflCpZ6/g8PotTn4U38= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=kDWUu3zu; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="kDWUu3zu" Received: by smtp.kernel.org (Postfix) with ESMTPSA id ACCBBC43399; Wed, 10 Apr 2024 06:14:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1712729646; bh=bDa3Vcz6I4Pm6HBOcI4duaKWHOWwh5YyRDPmIvGlPB0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kDWUu3zu/P9veaO8fBdmD4bNQ1ncUzrnVcixhzEkRH+8cgVQvI9eZgYuy5yR3nf0x d+cCq7Ov9hb5SY1/deaf4y2oJ9pemdVdhVqmCEzNbeQpZgqabhs3TnNTpIBX/BnrLd yXsqLiAVGN7opF10Ks1OxWxU6polwoIJmNcjxlLTYyiMkYUSDztfVp4TsZcz67RE1e +zzO8XHDXUn2A35FdF+1o2nswHmAgaSbt5wd3kHeFAZ4RmRN6Hdyh+YrP9Pi9pwPsN iQMkPMCpX4jLbnEldqT2IWplTJ3/NO86GWJfauMwu/lTalAZBE/AOSJ4g4fFpBTZa5 TsJK1EUo4EC9g== From: Geliang Tang To: Andrii Nakryiko , Eduard Zingerman , 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: Geliang Tang , bpf@vger.kernel.org, mptcp@lists.linux.dev, linux-kselftest@vger.kernel.org Subject: [PATCH bpf-next v4 3/3] selftests/bpf: Support nonblock for send_recv_data Date: Wed, 10 Apr 2024 14:13:31 +0800 Message-Id: <9cd358958245f8ec87c4f553779aa4243f967a2f.1712729342.git.tanggeliang@kylinos.cn> X-Mailer: git-send-email 2.40.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Geliang Tang Some tests, such as the MPTCP bpf tests, require send_recv_data helper to run in nonblock mode. This patch adds nonblock support for send_recv_data(). Check if it is currently in nonblock mode, and if so, ignore EWOULDBLOCK to continue sending and receiving. Signed-off-by: Geliang Tang --- tools/testing/selftests/bpf/network_helpers.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/network_helpers.c b/tools/testing/selftests/bpf/network_helpers.c index 137cd18ef3f2..ca16ef2b648e 100644 --- a/tools/testing/selftests/bpf/network_helpers.c +++ b/tools/testing/selftests/bpf/network_helpers.c @@ -555,6 +555,7 @@ struct send_recv_arg { static void *send_recv_server(void *arg) { struct send_recv_arg *a = (struct send_recv_arg *)arg; + int flags = fcntl(a->fd, F_GETFL); ssize_t nr_sent = 0, bytes = 0; char batch[1500]; int err = 0, fd; @@ -578,6 +579,8 @@ static void *send_recv_server(void *arg) if (nr_sent == -1 && errno == EINTR) continue; if (nr_sent == -1) { + if (flags & O_NONBLOCK && errno == EWOULDBLOCK) + continue; err = -errno; break; } @@ -599,6 +602,7 @@ static void *send_recv_server(void *arg) int send_recv_data(int lfd, int fd, uint32_t total_bytes) { + int flags = fcntl(lfd, F_GETFL); ssize_t nr_recv = 0, bytes = 0; struct send_recv_arg arg = { .fd = lfd, @@ -622,8 +626,11 @@ int send_recv_data(int lfd, int fd, uint32_t total_bytes) MIN(total_bytes - bytes, sizeof(batch)), 0); if (nr_recv == -1 && errno == EINTR) continue; - if (nr_recv == -1) + if (nr_recv == -1) { + if (flags & O_NONBLOCK && errno == EWOULDBLOCK) + continue; break; + } bytes += nr_recv; }