From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f72.google.com (mail-pj1-f72.google.com [209.85.216.72]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7F47442FCBF for ; Mon, 3 Aug 2026 18:19:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.72 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785781151; cv=none; b=SDlmoM0l7nH1VezulBVjEgJZkcZmfsnxfZ5UGWYs0pcMd9KzV/Dt7xmpAH1cq8PuaIMw05q542EETO+P5OUiLx05vFohOhVWJnWVw96QHe42/iutVOY7V26IhpAkUnK4AB5pt5KDwjSpoyeDdtktydMI0/zgXFUt80MIa74bYZM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785781151; c=relaxed/simple; bh=v4jcurBknsFwSFqxXV+HHE5IZcn3tXxARlW04I6mzDc=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=MNiACKfajkoXbSmV0fZcCVxPB9tSJkujbiKwXROzfnqcHNpDenqp3ky2xFbkgKgpUeH98iNqNjQnvndOy0KsUOj0pLr21L20PqU+/QSJKqANIpjTbeOvoSup+mHLJy37UayXMZ/0npeZRX37M3MRq0RbkDP7mBA1GIZqZd2lT4U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--almasrymina.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=Sto4dhjz; arc=none smtp.client-ip=209.85.216.72 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--almasrymina.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="Sto4dhjz" Received: by mail-pj1-f72.google.com with SMTP id 98e67ed59e1d1-38f5ac7416eso4073791a91.3 for ; Mon, 03 Aug 2026 11:19:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1785781148; x=1786385948; darn=vger.kernel.org; h=content-type:cc:to:from:subject:message-id:references:mime-version :in-reply-to:date:from:to:cc:subject:date:message-id:reply-to :content-type; bh=N85O2htbxOwQYBQXBqLzGIcLGYl30Jy447s5MbRSUDA=; b=Sto4dhjzb+DF/TRfseUlLPUjYWcz/0BF5+ssA1IbvFEQTxycOPf8u5Em7v1rGrIZev oJDBNW1Vtuq8981m877lR9+CC0zEpDYZ35Ly8XZ6tbmJJZtxhFJJXa74O+UkKukQESPZ WntxGfe6smgkVOHE7z/sq2OHSgajxj6GidoXQQkGQEkeS5WjqbtApSQvAlbCSelumJk2 awZwzK87GyIxiaNAmPDwPTQCzRTmSY917Wum09WBgWQFfNH6daN/TMamXahkrmpPpaHb giW9hLXHqydbsnMKKlBx8vaIFygDK4YwVkspYgU7RlbbSFUBs+g2nTNAKPtVCQZ7jU9x ig7w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1785781148; x=1786385948; h=content-type:cc:to:from:subject:message-id:references:mime-version :in-reply-to:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=N85O2htbxOwQYBQXBqLzGIcLGYl30Jy447s5MbRSUDA=; b=DbOBcqaB/vmYioYxdCcPUCWezP2eMVZasFcSjTlPc1c7/nV6Gm6LAQ42qenRgUd76t xqcIUEIcg3fUuU9AmnjqJQn1y574J5y+EZyTOG1TzCndrRfma/SsnZxOZbNt7pGaloti eD8ovRuMlUlrjFrKKa17GbRspAqq33LP2dfTXW3clzBjcxfWEg+mMV2WmDiPa+ZjYMiu fhrHKo35GbPD11ZW0XYkcKV0UoFfXCAzY8+q0T5mdGI6i30pdTQiZY8Xfiz82gMQkQNL q7/mHpiOeNCLZJCrdIu2ehi1znF7Jq/NLsaFV/Wqj6f6+Atc4j16EVohJX7u8EOIVd7n dyXg== X-Gm-Message-State: AOJu0YxhgiS9NCHRxkS+04QUH7DSp0nRluyXh4um1x18fa4KXUYCg6Et q8VfRZk+lklzXYSRCV/HdUR+2AYAUHuQQ4LTx+c5dKozJ0HBju/3LuylMJafEgJv5QO6QCNmwBQ shncHHyZg9EVYBmNPeE/GlpQDJjVhx6JcwDy8zpWq5cddt+0rX8w0dqRho/UtDlDH4smrQQxElY QeN3N8BFyxb/nZdIFP4BiZSSfX6xcya9TLFckzo+gBBShef/w3cQ6bYmyx+5SABSA= X-Received: from dycnh9.prod.google.com ([2002:a05:7300:ce89:b0:313:f483:7fe2]) (user=almasrymina job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:5746:b0:38e:5c6:4db9 with SMTP id 98e67ed59e1d1-38fbc425f10mr9496461a91.11.1785781147399; Mon, 03 Aug 2026 11:19:07 -0700 (PDT) Date: Mon, 3 Aug 2026 18:18:26 +0000 In-Reply-To: <20260803181852.491437-1-almasrymina@google.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260803181852.491437-1-almasrymina@google.com> X-Mailer: git-send-email 2.55.0.571.g244d577d93-goog Message-ID: <20260803181852.491437-2-almasrymina@google.com> Subject: [PATCH net-next v2 2/2] selftests: drv-net: ncdevmem: gracefully retry bind() From: Mina Almasry To: netdev@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Mina Almasry , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Shuah Khan , Stanislav Fomichev , Bobby Eshleman Content-Type: text/plain; charset="UTF-8" During tests, ethnl_rings_set randomly bounces the link causing a transient IPv6 Duplicate Address Detection "tentative" race, resulting in spurious -EADDRNOTAVAIL aborts inside the ncdevmem server. Add a simple 10 second retry loop around bind() to absorb the link bounce. Signed-off-by: Mina Almasry --- v2: - Refactored C99 mid-scope variables to strictly adhere to C89 styling. - Dropped single-line curly brace avoidance syntax. v1: https://patchwork.kernel.org/project/netdevbpf/patch/20260801131220.1367229-2-almasrymina@google.com/ --- tools/testing/selftests/drivers/net/hw/ncdevmem.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/drivers/net/hw/ncdevmem.c b/tools/testing/selftests/drivers/net/hw/ncdevmem.c index ffe1d5c1fa4e1..67901a0123e8c 100644 --- a/tools/testing/selftests/drivers/net/hw/ncdevmem.c +++ b/tools/testing/selftests/drivers/net/hw/ncdevmem.c @@ -843,6 +843,7 @@ static int do_server(struct memory_buffer *mem) char iobuf[819200]; int ret, err = -1; char buffer[256]; + int retries = 10; int socket_fd; int client_fd; @@ -898,7 +899,12 @@ static int do_server(struct memory_buffer *mem) fprintf(stderr, "binding to address %s:%d\n", server_ip, ntohs(server_sin.sin6_port)); - ret = bind(socket_fd, &server_sin, sizeof(server_sin)); + while (retries--) { + ret = bind(socket_fd, &server_sin, sizeof(server_sin)); + if (!ret) + break; + sleep(1); + } if (ret) { pr_err("Failed to bind"); goto err_close_socket; -- 2.55.0.571.g244d577d93-goog