From patchwork Thu Nov 5 06:09:54 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Muneendra Kumar M X-Patchwork-Id: 11884387 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D4C071744 for ; Thu, 5 Nov 2020 13:03:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8AF662087D for ; Thu, 5 Nov 2020 13:03:25 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b="LXzH5mEV" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730594AbgKENDY (ORCPT ); Thu, 5 Nov 2020 08:03:24 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59206 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725468AbgKENDX (ORCPT ); Thu, 5 Nov 2020 08:03:23 -0500 Received: from mail-pf1-x42c.google.com (mail-pf1-x42c.google.com [IPv6:2607:f8b0:4864:20::42c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 97C9CC0613CF for ; Thu, 5 Nov 2020 05:03:23 -0800 (PST) Received: by mail-pf1-x42c.google.com with SMTP id y7so390912pfq.11 for ; Thu, 05 Nov 2020 05:03:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=Cu07e8/kT3mYvc0P5Yz/ZPTYuhP+CdMddVbnC1aSZ9Q=; b=LXzH5mEVcjRUu+AkGSW65W01UqMjRWdDmFyewIy1vISVq2djvMF7XEbE+Foc7dwRl6 1Q/AgZTnkTRCFzXJXKmV7Mj9JO5VDPDKFXNPBYnK64Vv+AYHOGir1t9RGDRIkP7/0fIB 0oNlBHMgm7sWmuulgoCWdsRduJiLslM+QYhk4= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=Cu07e8/kT3mYvc0P5Yz/ZPTYuhP+CdMddVbnC1aSZ9Q=; b=Ayp3JLQSJDO4eNM2SFQNbjYJI14G7FwpW6NUey9ILA1bpFE231tvsXPif9CNHHiY2i C7RCUjPeTwTo6p4URrBDLDcDlcW1uAUpwB6H0ir6+/CEmBJuC4BZrSBC3TfRBLMRRHyj BNyhLwfwlPYRT3R8u5wmNXW1IHciuTDcgJyUnpvnyG4x2eWsG5jwd+czhscpow0z0B+F g3LIdRnZ6E99jViF5r/6lIwlIu0XxWBLH4+bROJKZazhhMFoqg/7zNz2wbya4kqEjBX5 ae27I6tLoFuv8urcA5OvW8hPoHFTpUlN63Kl+3UaMPNIddwpSoTCKYYitrISW6BoxvMy P8QA== X-Gm-Message-State: AOAM532Uf+Sw1ZTpSSE7s5TgiaZimgBhXX+Ydt5heTyvxXRvhUnVsdoV TLm7LuVm3K6fKZCUWr2VgWIFpJP99A/8C1AYHJxVWjv7/m0vVoaUUSXQRd/QTTU5WUyHs/E8pIc 7tsA3MbmngqAst5AEd95DGgqvThtrA7nmHvr8LVpfJWYufgIjOxquLe2vnrHdjwAJ7Lq3uLZFdC Kx6d/Z+28/X/U= X-Google-Smtp-Source: ABdhPJyQD4EIINIAM0eipa9q1q/nfMyxw9Mj2hPo/PPKwzkzIFLkAb0UTHbMyUUVpNaETMiFd+XgAQ== X-Received: by 2002:a62:f846:0:b029:15f:f897:7647 with SMTP id c6-20020a62f8460000b029015ff8977647mr2496415pfm.75.1604581402662; Thu, 05 Nov 2020 05:03:22 -0800 (PST) Received: from localhost.localdomain ([192.19.234.250]) by smtp.gmail.com with ESMTPSA id y141sm2491319pfb.17.2020.11.05.05.03.20 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Thu, 05 Nov 2020 05:03:22 -0800 (PST) From: Muneendra To: linux-scsi@vger.kernel.org, michael.christie@oracle.com, hare@suse.de Cc: jsmart2021@gmail.com, emilne@redhat.com, mkumar@redhat.com, Muneendra Subject: [PATCH v6 2/4] scsi: No retries on abort success Date: Thu, 5 Nov 2020 11:39:54 +0530 Message-Id: <1604556596-27228-3-git-send-email-muneendra.kumar@broadcom.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1604556596-27228-1-git-send-email-muneendra.kumar@broadcom.com> References: <1604556596-27228-1-git-send-email-muneendra.kumar@broadcom.com> Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Made an additional check in scsi_noretry_cmd to verify whether user has decided not to do retries on abort success by checking the SCMD_NORETRIES_ABORT bit If SCMD_NORETRIES_ABORT bit is set we are making sure there won't be any retries done on the same path and also setting the host byte as DID_TRANSPORT_MARGINAL so that the error can be propogated as recoverable transport error to the blk layers. Added a new error code DID_TRANSPORT_MARGINAL to handle marginal errors in scsi.h Added a code in scsi_result_to_blk_status to translate a new error DID_TRANSPORT_MARGINAL to the corresponding blk_status_t i.e BLK_STS_TRANSPORT Added DID_TRANSPORT_MARGINAL case to scsi_decide_disposition Signed-off-by: Muneendra --- v6: Rearranged the patch by merging second hunk of the patch2 in v5 to this patch v5: added the DID_TRANSPORT_MARGINAL case to scsi_decide_disposition v4: Modified the comments in the code appropriately v3: Merged first part of the previous patch(v2 patch3) with this patch. v2: set the hostbyte as DID_TRANSPORT_MARGINAL instead of DID_TRANSPORT_FAILFAST. --- drivers/scsi/scsi_error.c | 17 +++++++++++++++++ drivers/scsi/scsi_lib.c | 1 + include/scsi/scsi.h | 1 + 3 files changed, 19 insertions(+) diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index ae80daa5d831..02dfd70219b2 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -1763,6 +1763,16 @@ int scsi_noretry_cmd(struct scsi_cmnd *scmd) return 0; check_type: + /* + * Check whether caller has decided not to do retries on + * abort success by checking the SCMD_NORETRIES_ABORT bit + */ + if ((test_bit(SCMD_NORETRIES_ABORT, &scmd->state)) && + (scmd->request->cmd_flags & REQ_FAILFAST_TRANSPORT)) { + set_host_byte(scmd, DID_TRANSPORT_MARGINAL); + return 1; + } + /* * assume caller has checked sense and determined * the check condition was retryable. @@ -1861,6 +1871,13 @@ int scsi_decide_disposition(struct scsi_cmnd *scmd) * the fast io fail tmo fired), so send IO directly upwards. */ return SUCCESS; + + case DID_TRANSPORT_MARGINAL: + /* + * caller has decided not to do retries on + * abort success, so send IO directly upwards. + */ + return SUCCESS; case DID_ERROR: if (msg_byte(scmd->result) == COMMAND_COMPLETE && status_byte(scmd->result) == RESERVATION_CONFLICT) diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 2b5dea07498e..9606bad1542f 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -629,6 +629,7 @@ static blk_status_t scsi_result_to_blk_status(struct scsi_cmnd *cmd, int result) return BLK_STS_OK; return BLK_STS_IOERR; case DID_TRANSPORT_FAILFAST: + case DID_TRANSPORT_MARGINAL: return BLK_STS_TRANSPORT; case DID_TARGET_FAILURE: set_host_byte(cmd, DID_OK); diff --git a/include/scsi/scsi.h b/include/scsi/scsi.h index 5339baadc082..5b287ad8b727 100644 --- a/include/scsi/scsi.h +++ b/include/scsi/scsi.h @@ -159,6 +159,7 @@ static inline int scsi_is_wlun(u64 lun) * paths might yield different results */ #define DID_ALLOC_FAILURE 0x12 /* Space allocation on the device failed */ #define DID_MEDIUM_ERROR 0x13 /* Medium error */ +#define DID_TRANSPORT_MARGINAL 0x14 /* Transport marginal errors */ #define DRIVER_OK 0x00 /* Driver status */ /*