linux-kernel - Re: [PATCH blktests v2 00/12] Switch to allowed

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Message-ID: <xpoocad2nthor6naxp35h5qiz3oqxpijp5qds5qao6aguh6fp5@6fyygawm7kfq>
Date:   Fri, 11 Aug 2023 06:16:45 +0000
From:   Shinichiro Kawasaki <shinichiro.kawasaki@....com>
To:     Daniel Wagner <dwagner@...e.de>
CC:     "linux-nvme@...ts.infradead.org" <linux-nvme@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        Chaitanya Kulkarni <kch@...dia.com>,
        Max Gurtovoy <mgurtovoy@...dia.com>,
        Hannes Reinecke <hare@...e.de>,
        Sagi Grimberg <sagi@...mberg.me>,
        James Smart <jsmart2021@...il.com>,
        Bart Van Assche <bvanassche@....org>
Subject: Re: [PATCH blktests v2 00/12] Switch to allowed_host

On Aug 10, 2023 / 13:13, Daniel Wagner wrote:
> I've updated the series accoring the feedback. Also added the mentioned
> _nvmet_target_{setup|cleanup} helpers which reduced a lot of code.
> Roughly 350 lines code less after the refactoring.
> 
> Maybe it's possible to refactor even more, e.g. this snippet
> 
> 
> 	local nvmedev
> 	nvmedev=$(_find_nvme_dev "${def_subsysnqn}")
> 	cat "/sys/block/${nvmedev}n1/uuid"
> 	cat "/sys/block/${nvmedev}n1/wwid"
> 
> could be moved into _nvme_connect_subsys(). Though there are quiet a few tests
> which want the nvmedev later on for something like
> 
> 	_run_fio_verify_io --size="${nvme_img_size}" \
> 		--filename="/dev/${nvmedev}n1"
> 
> So we could return the nvmedev from _nvme_connect_subsys() but I don't know if
> this a good idea.

IMO, it is a good idea to make _nvme_connect_subsys() return the device. The
similar function _nvmet_passthru_target_connect() does that, so it is another
small goodness to have consistency between the two.

> FWIW, it would also fix the current problem we face with
> nvme/047 which seems to lack the second _find_nvme_dev() call.

I posted the fix patch for the nvme/047 problem reflecting your comments. I hope
that fix settled before further refactoring.

It is a fun to see the much of the boiler plates go away with the series :)
Thanks. I provided two minor comments on the 5th patch and 10th patch. Other
than that, this series looks good to me. Also I did another trial run, and
saw no regression. Good.