Received-SPF: pass (google.com: domain of linux-ext4-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Mon, 31 Jul 2023 12:50:34 +0200
From:   Jan Kara <jack@suse.cz>
To:     Haris Iqbal <haris.iqbal@ionos.com>
Cc:     Christoph Hellwig <hch@infradead.org>, Jan Kara <jack@suse.cz>,
        linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org,
        Jens Axboe <axboe@kernel.dk>, Alasdair Kergon <agk@redhat.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Anna Schumaker <anna@kernel.org>, Chao Yu <chao@kernel.org>,
        Christian Borntraeger <borntraeger@linux.ibm.com>,
        "Darrick J. Wong" <djwong@kernel.org>,
        Dave Kleikamp <shaggy@kernel.org>,
        David Sterba <dsterba@suse.com>, dm-devel@redhat.com,
        drbd-dev@lists.linbit.com, Gao Xiang <xiang@kernel.org>,
        Jack Wang <jinpu.wang@ionos.com>,
        Jaegeuk Kim <jaegeuk@kernel.org>,
        jfs-discussion@lists.sourceforge.net,
        Joern Engel <joern@lazybastard.org>,
        Joseph Qi <joseph.qi@linux.alibaba.com>,
        Kent Overstreet <kent.overstreet@gmail.com>,
        linux-bcache@vger.kernel.org, linux-btrfs@vger.kernel.org,
        linux-erofs@lists.ozlabs.org, linux-ext4@vger.kernel.org,
        linux-f2fs-devel@lists.sourceforge.net, linux-mm@kvack.org,
        linux-mtd@lists.infradead.org, linux-nfs@vger.kernel.org,
        linux-nilfs@vger.kernel.org, linux-nvme@lists.infradead.org,
        linux-pm@vger.kernel.org, linux-raid@vger.kernel.org,
        linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org,
        linux-xfs@vger.kernel.org, Mike Snitzer <snitzer@kernel.org>,
        Minchan Kim <minchan@kernel.org>, ocfs2-devel@oss.oracle.com,
        reiserfs-devel@vger.kernel.org,
        Sergey Senozhatsky <senozhatsky@chromium.org>,
        Song Liu <song@kernel.org>,
        Sven Schnelle <svens@linux.ibm.com>,
        target-devel@vger.kernel.org, Ted Tso <tytso@mit.edu>,
        Trond Myklebust <trond.myklebust@hammerspace.com>,
        xen-devel@lists.xenproject.org
Subject: Re: [PATCH 01/32] block: Provide blkdev_get_handle_* functions
Message-ID: <20230731105034.43skhi5ubze563c3@quack3>
References: <20230629165206.383-1-jack@suse.cz>
 <20230704122224.16257-1-jack@suse.cz>
 <ZKbgAG5OoHVyUKOG@infradead.org>
 <CAJpMwyiUcw+mH0sZa8f8UJsaSZ7NSE65s2gZDEia+pASyP_gJQ@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
Content-Transfer-Encoding: 8bit
In-Reply-To: <CAJpMwyiUcw+mH0sZa8f8UJsaSZ7NSE65s2gZDEia+pASyP_gJQ@mail.gmail.com>
Precedence: bulk

On Wed 12-07-23 18:06:35, Haris Iqbal wrote:
> On Thu, Jul 6, 2023 at 5:38 PM Christoph Hellwig <hch@infradead.org> wrote:
> >
> > On Tue, Jul 04, 2023 at 02:21:28PM +0200, Jan Kara wrote:
> > > Create struct bdev_handle that contains all parameters that need to be
> > > passed to blkdev_put() and provide blkdev_get_handle_* functions that
> > > return this structure instead of plain bdev pointer. This will
> > > eventually allow us to pass one more argument to blkdev_put() without
> > > too much hassle.
> >
> > Can we use the opportunity to come up with better names?  blkdev_get_*
> > was always a rather horrible naming convention for something that
> > ends up calling into ->open.
> >
> > What about:
> >
> > struct bdev_handle *bdev_open_by_dev(dev_t dev, blk_mode_t mode, void *holder,
> >                 const struct blk_holder_ops *hops);
> > struct bdev_handle *bdev_open_by_path(dev_t dev, blk_mode_t mode,
> >                 void *holder, const struct blk_holder_ops *hops);
> > void bdev_release(struct bdev_handle *handle);
> 
> +1 to this.
> Also, if we are removing "handle" from the function, should the name
> of the structure it returns also change? Would something like bdev_ctx
> be better?

I think the bdev_handle name is fine for the struct. After all it is
equivalent of an open handle for the block device so IMHO bdev_handle
captures that better than bdev_ctx.

								Honza
-- 
Jan Kara <jack@suse.com>
SUSE Labs, CR