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From: Christoph Hellwig <hch@bombadil.infradead.org>
To: Jens Axboe <axboe@kernel.dk>
Cc: "Josef Bacik" <jbacik@fb.com>,
	"James Smart" <james.smart@broadcom.com>,
	"Konrad Rzeszutek Wilk" <konrad.wilk@oracle.com>,
	"Roger Pau Monné" <roger.pau@citrix.com>,
	linux-scsi@vger.kernel.org, linux-nvme@lists.infradead.org,
	linux-block@vger.kernel.org, dm-devel@redhat.com
Subject: kill req->errors V2
Date: Tue, 18 Apr 2017 08:52:06 -0700	[thread overview]
Message-ID: <20170418155229.5977-1-hch@bombadil.infradead.org> (raw)

Currently the request structure has an errors field that is used in
various different ways.  The oldest drivers use it as an error count,
blk-mq and the generic timeout code assume that it holds a Linux
errno for block completions, and various drivers use it for internal
status values, often overwriting them with Linux errnos later,
that is unless they are processing passthrough requests in which
case they'll leave their errors in it.

This series kills the ->errors field and replaced it with new fields
in the drivers (or an odd hack in a union in struct request for
two bitrotting old drivers).

Also available in the following git tree:

    git://git.infradead.org/users/hch/block.git request-errors

Gitweb:

    http://git.infradead.org/users/hch/block.git/shortlog/refs/heads/request-errors


Changes since V1:
 - rebased on top the latest block for-next tree
 - fix error handling in nfsd blocklayout
 - dropped "scsi: fix fast-fail for non-passthrough requests"

WARNING: multiple messages have this Message-ID (diff)
From: hch@bombadil.infradead.org (Christoph Hellwig)
Subject: kill req->errors V2
Date: Tue, 18 Apr 2017 08:52:06 -0700	[thread overview]
Message-ID: <20170418155229.5977-1-hch@bombadil.infradead.org> (raw)

Currently the request structure has an errors field that is used in
various different ways.  The oldest drivers use it as an error count,
blk-mq and the generic timeout code assume that it holds a Linux
errno for block completions, and various drivers use it for internal
status values, often overwriting them with Linux errnos later,
that is unless they are processing passthrough requests in which
case they'll leave their errors in it.

This series kills the ->errors field and replaced it with new fields
in the drivers (or an odd hack in a union in struct request for
two bitrotting old drivers).

Also available in the following git tree:

    git://git.infradead.org/users/hch/block.git request-errors

Gitweb:

    http://git.infradead.org/users/hch/block.git/shortlog/refs/heads/request-errors


Changes since V1:
 - rebased on top the latest block for-next tree
 - fix error handling in nfsd blocklayout
 - dropped "scsi: fix fast-fail for non-passthrough requests"

             reply	other threads:[~2017-04-18 15:52 UTC|newest]

Thread overview: 73+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-04-18 15:52 Christoph Hellwig [this message]
2017-04-18 15:52 ` kill req->errors V2 Christoph Hellwig
2017-04-18 15:52 ` block: remove the blk_execute_rq return value Christoph Hellwig
2017-04-18 15:52   ` Christoph Hellwig
2017-04-18 22:24   ` Bart Van Assche
2017-04-18 22:24     ` Bart Van Assche
2017-04-18 22:24     ` Bart Van Assche
2017-04-19  6:13     ` hch
2017-04-19  6:13       ` hch
2017-04-18 15:52 ` nvme-fc: fix status code handling in nvme_fc_fcpio_done Christoph Hellwig
2017-04-18 15:52   ` Christoph Hellwig
2017-04-18 21:08   ` James Smart
2017-04-18 21:08     ` James Smart
2017-04-18 15:52 ` nvme: split nvme status from block req->errors Christoph Hellwig
2017-04-18 15:52   ` Christoph Hellwig
2017-04-18 15:52 ` nvme: make nvme_error_status private Christoph Hellwig
2017-04-18 15:52   ` Christoph Hellwig
2017-04-18 15:52 ` virtio: fix spelling of virtblk_scsi_request_done Christoph Hellwig
2017-04-18 15:52   ` Christoph Hellwig
2017-04-18 15:52 ` virtio_blk: don't use req->errors Christoph Hellwig
2017-04-18 15:52   ` Christoph Hellwig
2017-04-18 15:52 ` scsi: introduce a new result field in struct scsi_request Christoph Hellwig
2017-04-18 15:52   ` Christoph Hellwig
2017-04-18 22:34   ` Bart Van Assche
2017-04-18 22:34     ` Bart Van Assche
2017-04-18 22:34     ` Bart Van Assche
2017-04-19  6:14     ` hch
2017-04-19  6:14       ` hch
2017-04-18 15:52 ` loop: zero-fill bio on the submitting cpu Christoph Hellwig
2017-04-18 15:52   ` Christoph Hellwig
2017-04-18 15:52 ` null_blk: don't pass always-0 req->errors to blk_mq_complete_request Christoph Hellwig
2017-04-18 15:52   ` Christoph Hellwig
2017-04-18 15:52 ` dm rq: don't pass irrelevant error code " Christoph Hellwig
2017-04-18 15:52   ` Christoph Hellwig
2017-04-18 15:52 ` dm mpath: don't check for req->errors Christoph Hellwig
2017-04-18 15:52   ` Christoph Hellwig
2017-04-18 15:52 ` nbd: don't use req->errors Christoph Hellwig
2017-04-18 15:52   ` Christoph Hellwig
2017-04-18 15:52 ` mtip32xx: add a status field to struct mtip_cmd Christoph Hellwig
2017-04-18 15:52   ` Christoph Hellwig
2017-04-18 15:52 ` xen-blkfront: don't use req->errors Christoph Hellwig
2017-04-18 15:52   ` Christoph Hellwig
2017-04-18 15:52 ` blk-mq: remove the error argument to blk_mq_complete_request Christoph Hellwig
2017-04-18 15:52   ` Christoph Hellwig
2017-04-18 22:50   ` Bart Van Assche
2017-04-18 22:50     ` Bart Van Assche
2017-04-18 22:50     ` Bart Van Assche
2017-04-19 17:54     ` hch
2017-04-19 17:54       ` hch
2017-04-18 15:52 ` blk-mq: simplify __blk_mq_complete_request Christoph Hellwig
2017-04-18 15:52   ` Christoph Hellwig
2017-04-18 15:52 ` block: add a error_count field to struct request Christoph Hellwig
2017-04-18 15:52   ` Christoph Hellwig
2017-04-18 22:57   ` Bart Van Assche
2017-04-18 22:57     ` Bart Van Assche
2017-04-18 22:57     ` Bart Van Assche
2017-04-19  6:15     ` hch
2017-04-19  6:15       ` hch
2017-04-18 15:52 ` floppy: switch from req->errors to req->error_count Christoph Hellwig
2017-04-18 15:52   ` Christoph Hellwig
2017-04-18 15:52 ` ataflop: " Christoph Hellwig
2017-04-18 15:52   ` Christoph Hellwig
2017-04-18 15:52 ` swim3: remove (commented out) printing of req->errors Christoph Hellwig
2017-04-18 15:52   ` Christoph Hellwig
2017-04-18 15:52 ` pd: remove bogus check for req->errors Christoph Hellwig
2017-04-18 15:52   ` Christoph Hellwig
2017-04-18 22:59   ` Bart Van Assche
2017-04-18 22:59     ` Bart Van Assche
2017-04-18 22:59     ` Bart Van Assche
2017-04-18 15:52 ` blktrace: remove the unused block_rq_abort tracepoint Christoph Hellwig
2017-04-18 15:52   ` Christoph Hellwig
2017-04-18 15:52 ` block: remove the errors field from struct request Christoph Hellwig
2017-04-18 15:52   ` Christoph Hellwig

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