linux-ext4 - Re: [PATCH 01/32] block: Provide blkdev_get_handle

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Date:   Thu, 6 Jul 2023 18:14:33 +0200
From:   Jan Kara <jack@...e.cz>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     Jan Kara <jack@...e.cz>, linux-block@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, Jens Axboe <axboe@...nel.dk>,
        Alasdair Kergon <agk@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Anna Schumaker <anna@...nel.org>, Chao Yu <chao@...nel.org>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        "Darrick J. Wong" <djwong@...nel.org>,
        Dave Kleikamp <shaggy@...nel.org>,
        David Sterba <dsterba@...e.com>, dm-devel@...hat.com,
        drbd-dev@...ts.linbit.com, Gao Xiang <xiang@...nel.org>,
        Jack Wang <jinpu.wang@...os.com>,
        Jaegeuk Kim <jaegeuk@...nel.org>,
        jfs-discussion@...ts.sourceforge.net,
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        target-devel@...r.kernel.org, Ted Tso <tytso@....edu>,
        Trond Myklebust <trond.myklebust@...merspace.com>,
        xen-devel@...ts.xenproject.org
Subject: Re: [PATCH 01/32] block: Provide blkdev_get_handle_* functions

On Thu 06-07-23 08:38:40, Christoph Hellwig 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);

I'd maybe use bdev_close() instead of bdev_release() but otherwise I like
the new naming.

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