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[85.226.246.252]) by smtp.gmail.com with ESMTPSA id q12-20020ac2528c000000b004db39e80733sm226552lfm.155.2023.04.06.04.35.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Apr 2023 04:35:56 -0700 (PDT) Received: by flawful.org (Postfix, from userid 112) id EA13369A; Thu, 6 Apr 2023 13:35:55 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=flawful.org; s=mail; t=1680780956; bh=Ml7y/jf7AIB69js3iH/Wxe2UpbdPAiIMGTLWNNw4CTk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LyvsX3M5Zoe3QR9zfczY4NwgS27ZqdVPV+NdvFxCtr3b+akOM+t+omOt/biLkPlCH 1PwBgaIPx0Y1qjkYJ/klXnmxnmHMh5pKTvZNG2/ZxpCKtoghpugYegVN3vPG+R897q Gg1aPDZALapd78wo2L4vucRyOlgDP5MEOOhaTeCw= Received: from x1-carbon.lan (OpenWrt.lan [192.168.1.1]) (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) by flawful.org (Postfix) with ESMTPSA id CDC256D4; Thu, 6 Apr 2023 13:33:07 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=flawful.org; s=mail; t=1680780788; bh=Ml7y/jf7AIB69js3iH/Wxe2UpbdPAiIMGTLWNNw4CTk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=iokZ8Ff14pXTPl9z/wTIeaMPtkBCylmJ2YQCeGlr51TT9hDoFtZTNGKh/M10Hb1Tw PdHardtCiG7D/XLzUnm+v6X2Ph/T98Ua5VU4WHOhVaiug4EE47Md65rJVgObg16ARE wOWwqCXja/eJ8FsRjOSODhGLqHaFLrSKgF8lBkgw= From: Niklas Cassel To: Jens Axboe , "Martin K. Petersen" Cc: Bart Van Assche , Christoph Hellwig , Hannes Reinecke , Damien Le Moal , Damien Le Moal , linux-scsi@vger.kernel.org, linux-ide@vger.kernel.org, linux-block@vger.kernel.org, Niklas Cassel Subject: [PATCH v6 03/19] block: introduce BLK_STS_DURATION_LIMIT Date: Thu, 6 Apr 2023 13:32:32 +0200 Message-Id: <20230406113252.41211-4-nks@flawful.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230406113252.41211-1-nks@flawful.org> References: <20230406113252.41211-1-nks@flawful.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org From: Damien Le Moal Introduce the new block IO status BLK_STS_DURATION_LIMIT for LLDDs to report command that failed due to a command duration limit being exceeded. This new status is mapped to the ETIME error code to allow users to differentiate "soft" duration limit failures from other more serious hardware related errors. If we compare BLK_STS_DURATION_LIMIT with BLK_STS_TIMEOUT: -BLK_STS_DURATION_LIMIT means that the drive gave a reply indicating that the command duration limit was exceeded before the command could be completed. This IO status is mapped to ETIME for user space. -BLK_STS_TIMEOUT means that the drive never gave a reply at all. This IO status is mapped to ETIMEDOUT for user space. Signed-off-by: Damien Le Moal Co-developed-by: Niklas Cassel Signed-off-by: Niklas Cassel Reviewed-by: Hannes Reinecke Reviewed-by: Christoph Hellwig Reviewed-by: Christoph Hellwig --- block/blk-core.c | 3 +++ include/linux/blk_types.h | 6 ++++++ 2 files changed, 9 insertions(+) diff --git a/block/blk-core.c b/block/blk-core.c index 42926e6cb83c..be7facaa11a6 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -170,6 +170,9 @@ static const struct { [BLK_STS_ZONE_OPEN_RESOURCE] = { -ETOOMANYREFS, "open zones exceeded" }, [BLK_STS_ZONE_ACTIVE_RESOURCE] = { -EOVERFLOW, "active zones exceeded" }, + /* Command duration limit device-side timeout */ + [BLK_STS_DURATION_LIMIT] = { -ETIME, "duration limit exceeded" }, + /* everything else not covered above: */ [BLK_STS_IOERR] = { -EIO, "I/O" }, }; diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h index 99be590f952f..cde997590765 100644 --- a/include/linux/blk_types.h +++ b/include/linux/blk_types.h @@ -166,6 +166,12 @@ typedef u16 blk_short_t; */ #define BLK_STS_OFFLINE ((__force blk_status_t)17) +/* + * BLK_STS_DURATION_LIMIT is returned from the driver when the target device + * aborted the command because it exceeded one of its Command Duration Limits. + */ +#define BLK_STS_DURATION_LIMIT ((__force blk_status_t)18) + /** * blk_path_error - returns true if error may be path related * @error: status the request was completed with