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From: Christoph Hellwig <hch@lst.de>
To: Tom Yan <tom.ty89@gmail.com>
Cc: Christoph Hellwig <hch@lst.de>,
	linux-scsi@vger.kernel.org, dgilbert@interlog.com,
	Bart Van Assche <bvanassche@acm.org>,
	Alan Stern <stern@rowland.harvard.edu>,
	akinobu.mita@gmail.com, linux-api@vger.kernel.org
Subject: Re: [PATCH RESEND 2/4] scsi: sg: implement BLKSSZGET
Date: Fri, 11 Sep 2020 08:48:44 +0200	[thread overview]
Message-ID: <20200911064844.GA22190@lst.de> (raw)
In-Reply-To: <CAGnHSE=pcW0zJMSaowdsRXFa=TmOeidekgvDuEPB8PU7mheXNA@mail.gmail.com>

On Fri, Sep 11, 2020 at 10:52:19AM +0800, Tom Yan wrote:
> > How is that an advantage?  Applications that works with block devices
> > don't really work with a magic passthrough character device.
> 
> You must assume that there are applications already assuming that
> work. (And it will, at least in some cases, if this series get
> merged.)

Why "must" I assume that?

> And you have not been giving me a solid point anyway, as I said, it's
> just queue_*() at the end of the day; regardless of whether those
> would work in all sg cases, we have been using them in the sg driver
> anyway.
> 
> And it's not like we have to guarantee that (the) ioctls can work in
> every case anyway, right? (Especially when they aren't named SG_*).

No.  While it is unfortunte we have all kinds of cases of ioctls working
differnetly on different devices.

> 
> I mean, what's even your point? How do you propose we fix this?

I propose to not "fix" anything, because nothing is broken except for
maybe a lack of documentation.

  reply	other threads:[~2020-09-11  6:48 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-04  4:42 About BLKSECTGET in sg Tom Yan
2020-09-04 16:28 ` Douglas Gilbert
2020-09-04 19:21   ` Tom Yan
2020-09-04 20:05     ` [PATCH 1/4] scsi: sg: fix BLKSECTGET ioctl Tom Yan
2020-09-04 20:05       ` [PATCH 2/4] scsi: sg: implement BLKSSZGET Tom Yan
2020-09-05 18:37         ` Douglas Gilbert
2020-09-04 20:05       ` [PATCH 3/4] scsi: sg: use queue_logical_sector_size() in max_sectors_bytes() Tom Yan
2020-09-05 18:37         ` Douglas Gilbert
2020-09-04 20:05       ` [PATCH 4/4] block/scsi_ioctl.c: " Tom Yan
2020-09-05 18:37         ` Douglas Gilbert
2020-09-05 18:37       ` [PATCH 1/4] scsi: sg: fix BLKSECTGET ioctl Douglas Gilbert
2020-09-05 19:32       ` Bart Van Assche
2020-09-05 20:36         ` Douglas Gilbert
2020-09-06  1:19           ` Tom Yan
2020-09-06  1:25             ` [PATCH RESEND " Tom Yan
2020-09-06  1:25               ` [PATCH RESEND 2/4] scsi: sg: implement BLKSSZGET Tom Yan
2020-09-06  1:25               ` [PATCH RESEND 3/4] scsi: sg: use queue_logical_sector_size() in max_sectors_bytes() Tom Yan
2020-09-06  1:25               ` [PATCH RESEND 4/4] block/scsi_ioctl.c: " Tom Yan
2020-09-06  1:27             ` [PATCH RESEND 1/4] scsi: sg: fix BLKSECTGET ioctl Tom Yan
2020-09-06  1:27               ` [PATCH RESEND 2/4] scsi: sg: implement BLKSSZGET Tom Yan
2020-09-07  6:09                 ` Christoph Hellwig
2020-09-07  9:01                   ` Tom Yan
2020-09-08  8:42                     ` Christoph Hellwig
2020-09-10  1:59                       ` Tom Yan
2020-09-10  5:28                         ` Christoph Hellwig
2020-09-11  2:52                           ` Tom Yan
2020-09-11  6:48                             ` Christoph Hellwig [this message]
2020-09-11 17:52                               ` Douglas Gilbert
2020-09-11 21:33                                 ` Alan Stern
2020-09-16  5:47                               ` Tom Yan
2020-09-06  1:27               ` [PATCH RESEND 3/4] scsi: sg: use queue_logical_sector_size() in max_sectors_bytes() Tom Yan
2020-09-06  6:26                 ` Greg KH
2020-09-06  7:01                   ` Tom Yan
2020-09-06  7:40                     ` [PATCH v2 1/4] scsi: sg: fix BLKSECTGET ioctl Tom Yan
2020-09-06  7:40                       ` [PATCH v2 2/4] scsi: sg: implement BLKSSZGET Tom Yan
2020-09-06  7:40                       ` [PATCH v2 3/4] scsi: sg: use queue_logical_sector_size() in max_sectors_bytes() Tom Yan
2020-09-06  7:40                       ` [PATCH v2 4/4] block/scsi_ioctl.c: " Tom Yan
2020-09-06  7:51                     ` [PATCH v3 1/4] scsi: sg: fix BLKSECTGET ioctl Tom Yan
2020-09-06  7:51                       ` [PATCH v3 2/4] scsi: sg: implement BLKSSZGET Tom Yan
2020-09-06  7:51                       ` [PATCH v3 3/4] scsi: sg: use queue_logical_sector_size() in max_sectors_bytes() Tom Yan
2020-09-06  7:51                       ` [PATCH v3 4/4] block/scsi_ioctl.c: " Tom Yan
2020-09-06  1:27               ` [PATCH RESEND " Tom Yan
2020-09-06  5:09             ` [PATCH 1/4] scsi: sg: fix BLKSECTGET ioctl Douglas Gilbert
2020-09-06  7:16               ` Tom Yan

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