From patchwork Fri Aug 9 19:31:13 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bart Van Assche X-Patchwork-Id: 13759192 Received: from 008.lax.mailroute.net (008.lax.mailroute.net [199.89.1.11]) (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 229083D6D for ; Fri, 9 Aug 2024 19:31:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=199.89.1.11 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723231905; cv=none; b=Y7OB07T8NJcsQ4L+JDvniYkyTy51MLKdoksmVrUfIjlC00tMAvbS1bt8L7o2Cr3NrgP6+liPFXQhhmm79tzXRfnXe4Rep5R9dO8sdrKunDBFWZffBjR2k3DkVu30LkzU6R4bPBV2IP+fk77C3+01Y4yZClMtjWggb9dsoam2eL8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723231905; c=relaxed/simple; bh=9NEep1vc1qpa3J3Zv8iPQJwJJ2tC5ugq1WAiL/5JGKk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=qHPvKJKuoOTK3rwfo0B6H/VrR+pQQhyddDmEn6y64PJqHQPxD3ByMDeqTYh6SN9523bm0cy+F7oacexYNoqsErue0UsSOnHs3JeL7GeafAxxej3eB/uIwh5SJ2yB3AE4Km2DRZsaMeZrE7wZogGhPgyxnoGEJJ5OrnRfo3QQths= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=acm.org; spf=pass smtp.mailfrom=acm.org; dkim=pass (2048-bit key) header.d=acm.org header.i=@acm.org header.b=BddWq0K4; arc=none smtp.client-ip=199.89.1.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=acm.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=acm.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=acm.org header.i=@acm.org header.b="BddWq0K4" Received: from localhost (localhost [127.0.0.1]) by 008.lax.mailroute.net (Postfix) with ESMTP id 4WgYv34Sf4z6Cnk98; Fri, 9 Aug 2024 19:31:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=acm.org; h= content-transfer-encoding:mime-version:references:in-reply-to :x-mailer:message-id:date:date:subject:subject:from:from :received:received; s=mr01; t=1723231900; x=1725823901; bh=Yg58L 53BiHu1/iSeNIpPUcwVoICYHFuI1GMCNM0MHXU=; b=BddWq0K4YY71+JfoZ8Tx3 4thXp4xBeDPT00ASLngR4Ix4GMdMJoOw0oYrrzeQG4Z+jnFCgZfFd/XPlxKV23dh HFlOnIggkKQyFFfwwCJI3bRsyNVmPgszZ6pzvRrdsM8MKTHGwSOEuX+xOK5x0VYw ogykVp1De+9g/M06PAQlae1pqMNw90PwRZ+kDJWsGX3lMaDdYzN7/O2LYj7uTKkL ZsitxznW9yzFIeHxkqdiRB0j8uQlTYv0Hn/9fG6xiZ7+deJ9oayJpBH/ozADpiF4 6JIGEVJR35W40jjlA/c+7qRwg57fL+uklrxBQ92/BXNPYP6FlGHqZQ3+asoURknj w== X-Virus-Scanned: by MailRoute Received: from 008.lax.mailroute.net ([127.0.0.1]) by localhost (008.lax [127.0.0.1]) (mroute_mailscanner, port 10029) with LMTP id vrbsnk-jk8W9; Fri, 9 Aug 2024 19:31:40 +0000 (UTC) Received: from bvanassche.mtv.corp.google.com (unknown [104.135.204.82]) (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) (Authenticated sender: bvanassche@acm.org) by 008.lax.mailroute.net (Postfix) with ESMTPSA id 4WgYv015q7z6ClY8x; Fri, 9 Aug 2024 19:31:40 +0000 (UTC) From: Bart Van Assche To: "Martin K . Petersen" Cc: linux-scsi@vger.kernel.org, Bart Van Assche , Damien Le Moal , Mike Christie , "James E.J. Bottomley" Subject: [PATCH v2 1/2] scsi: core: Retry passthrough commands if SCMD_RETRY_PASSTHROUGH is set Date: Fri, 9 Aug 2024 12:31:13 -0700 Message-ID: <20240809193115.1222737-2-bvanassche@acm.org> X-Mailer: git-send-email 2.46.0.76.ge559c4bf1a-goog In-Reply-To: <20240809193115.1222737-1-bvanassche@acm.org> References: <20240809193115.1222737-1-bvanassche@acm.org> Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The SCSI core does not retry passthrough commands even if the SCSI device reports a retryable unit attention condition. Support retrying in this case by introducing the SCMD_RETRY_PASSTHROUGH flag. Cc: Damien Le Moal Cc: Mike Christie Signed-off-by: Bart Van Assche Reviewed-by: Damien Le Moal --- drivers/scsi/scsi_error.c | 5 ++++- include/scsi/scsi_cmnd.h | 5 ++++- 2 files changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index 612489afe8d2..9089d39c2170 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -1855,7 +1855,10 @@ bool scsi_noretry_cmd(struct scsi_cmnd *scmd) * assume caller has checked sense and determined * the check condition was retryable. */ - if (req->cmd_flags & REQ_FAILFAST_DEV || blk_rq_is_passthrough(req)) + if (req->cmd_flags & REQ_FAILFAST_DEV) + return true; + if (blk_rq_is_passthrough(req) && + !(scmd->flags & SCMD_RETRY_PASSTHROUGH)) return true; return false; diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h index 45c40d200154..19c57446ab23 100644 --- a/include/scsi/scsi_cmnd.h +++ b/include/scsi/scsi_cmnd.h @@ -58,8 +58,11 @@ struct scsi_pointer { */ #define SCMD_FORCE_EH_SUCCESS (1 << 3) #define SCMD_FAIL_IF_RECOVERING (1 << 4) +/* If set, retry a passthrough command in case of a unit attention. */ +#define SCMD_RETRY_PASSTHROUGH (1 << 5) /* flags preserved across unprep / reprep */ -#define SCMD_PRESERVED_FLAGS (SCMD_INITIALIZED | SCMD_FAIL_IF_RECOVERING) +#define SCMD_PRESERVED_FLAGS \ + (SCMD_INITIALIZED | SCMD_FAIL_IF_RECOVERING | SCMD_RETRY_PASSTHROUGH) /* for scmd->state */ #define SCMD_STATE_COMPLETE 0