From patchwork Thu Nov 11 15:33:45 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roman Kagan X-Patchwork-Id: 12615203 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9C7E1C433EF for ; Thu, 11 Nov 2021 15:36:38 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5518561502 for ; Thu, 11 Nov 2021 15:36:38 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 5518561502 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=yandex-team.ru Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:34366 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mlC7x-0000se-HH for qemu-devel@archiver.kernel.org; Thu, 11 Nov 2021 10:36:37 -0500 Received: from eggs.gnu.org ([209.51.188.92]:40462) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mlC5c-0004Rl-QZ; Thu, 11 Nov 2021 10:34:13 -0500 Received: from forwardcorp1j.mail.yandex.net ([5.45.199.163]:40958) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mlC5U-00041n-C2; Thu, 11 Nov 2021 10:34:07 -0500 Received: from iva8-d2cd82b7433e.qloud-c.yandex.net (iva8-d2cd82b7433e.qloud-c.yandex.net [IPv6:2a02:6b8:c0c:a88e:0:640:d2cd:82b7]) by forwardcorp1j.mail.yandex.net (Yandex) with ESMTP id ED2E22E1EB3; Thu, 11 Nov 2021 18:33:57 +0300 (MSK) Received: from iva8-3a65cceff156.qloud-c.yandex.net (iva8-3a65cceff156.qloud-c.yandex.net [2a02:6b8:c0c:2d80:0:640:3a65:ccef]) by iva8-d2cd82b7433e.qloud-c.yandex.net (mxbackcorp/Yandex) with ESMTP id zsePPL9uyc-XvsCs8cq; Thu, 11 Nov 2021 18:33:57 +0300 Precedence: bulk DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yandex-team.ru; s=default; t=1636644837; bh=nX/VQTsziIB/0PxDV+dfQg83qC3n/hyFTLwjB7EMJwU=; h=In-Reply-To:Message-Id:References:Date:Subject:To:From:Cc; b=bG4T5+N1cts9NmH8kQHz4aaAo3pvHaUz7hLaIdUODcRGH2ulWEuzLK2aY2Fuq7v2V LtwNd6oT6aB6HkYKAOsBIINGNctQ4aNmtFib2OsJTGp2w47EvWJwLLzZy9P6413vCe ajyjz5byzjgEEQwR+WL05Havmf6++94NYshfDZ4Q= Authentication-Results: iva8-d2cd82b7433e.qloud-c.yandex.net; dkim=pass header.i=@yandex-team.ru Received: from rvkaganb.lan (dynamic-vpn.dhcp.yndx.net [2a02:6b8:b081:8830::1:2d]) by iva8-3a65cceff156.qloud-c.yandex.net (smtpcorp/Yandex) with ESMTPS id WgGv8YbvMJ-XuwCbZVu; Thu, 11 Nov 2021 18:33:57 +0300 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (Client certificate not present) X-Yandex-Fwd: 2 From: Roman Kagan To: qemu-devel@nongnu.org Subject: [PATCH 01/10] vhost-user-blk: reconnect on any error during realize Date: Thu, 11 Nov 2021 18:33:45 +0300 Message-Id: <20211111153354.18807-2-rvkagan@yandex-team.ru> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211111153354.18807-1-rvkagan@yandex-team.ru> References: <20211111153354.18807-1-rvkagan@yandex-team.ru> MIME-Version: 1.0 Received-SPF: pass client-ip=5.45.199.163; envelope-from=rvkagan@yandex-team.ru; helo=forwardcorp1j.mail.yandex.net X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , qemu-block@nongnu.org, "Michael S. Tsirkin" , Raphael Norwitz , Hanna Reitz , yc-core@yandex-team.ru, =?utf-8?q?Marc-And?= =?utf-8?q?r=C3=A9_Lureau?= , Paolo Bonzini Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" vhost-user-blk realize only attempts to reconnect if the previous connection attempt failed on "a problem with the connection and not an error related to the content (which would fail again the same way in the next attempt)". However this distinction is very subtle, and may be inadvertently broken if the code changes somewhere deep down the stack and a new error gets propagated up to here. OTOH now that the number of reconnection attempts is limited it seems harmless to try reconnecting on any error. So relax the condition of whether to retry connecting to check for any error. This patch amends a527e312b5 "vhost-user-blk: Implement reconnection during realize". Signed-off-by: Roman Kagan Reviewed-by: Raphael Norwitz --- hw/block/vhost-user-blk.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/block/vhost-user-blk.c b/hw/block/vhost-user-blk.c index ba13cb87e5..f9b17f6813 100644 --- a/hw/block/vhost-user-blk.c +++ b/hw/block/vhost-user-blk.c @@ -511,7 +511,7 @@ static void vhost_user_blk_device_realize(DeviceState *dev, Error **errp) *errp = NULL; } ret = vhost_user_blk_realize_connect(s, errp); - } while (ret == -EPROTO && retries--); + } while (ret < 0 && retries--); if (ret < 0) { goto virtio_err;