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Message-ID: <20230825-hubraum-gedreht-8c5c4db9330a@brauner>
Date:   Fri, 25 Aug 2023 15:32:47 +0200
From:   Christian Brauner <brauner@...nel.org>
To:     Jan Kara <jack@...e.cz>
Cc:     Jens Axboe <axboe@...nel.dk>, linux-fsdevel@...r.kernel.org,
        linux-block@...r.kernel.org, Christoph Hellwig <hch@...radead.org>,
        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,
        Joern Engel <joern@...ybastard.org>,
        Joseph Qi <joseph.qi@...ux.alibaba.com>,
        Kent Overstreet <kent.overstreet@...il.com>,
        linux-bcache@...r.kernel.org, linux-btrfs@...r.kernel.org,
        linux-erofs@...ts.ozlabs.org, linux-ext4@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net, linux-mm@...ck.org,
        linux-mtd@...ts.infradead.org, linux-nfs@...r.kernel.org,
        linux-nilfs@...r.kernel.org, linux-nvme@...ts.infradead.org,
        linux-pm@...r.kernel.org, linux-raid@...r.kernel.org,
        linux-s390@...r.kernel.org, linux-scsi@...r.kernel.org,
        linux-xfs@...r.kernel.org,
        "Md. Haris Iqbal" <haris.iqbal@...os.com>,
        Mike Snitzer <snitzer@...nel.org>,
        Minchan Kim <minchan@...nel.org>, ocfs2-devel@....oracle.com,
        reiserfs-devel@...r.kernel.org,
        Sergey Senozhatsky <senozhatsky@...omium.org>,
        Song Liu <song@...nel.org>,
        Sven Schnelle <svens@...ux.ibm.com>,
        target-devel@...r.kernel.org, Ted Tso <tytso@....edu>,
        Trond Myklebust <trond.myklebust@...merspace.com>,
        xen-devel@...ts.xenproject.org
Subject: Re: [PATCH v3 0/29] block: Make blkdev_get_by_*() return handle

On Wed, Aug 23, 2023 at 12:48:11PM +0200, Jan Kara wrote:
> Hello,
> 
> this is a v3 of the patch series which implements the idea of blkdev_get_by_*()
> calls returning bdev_handle which is then passed to blkdev_put() [1]. This
> makes the get and put calls for bdevs more obviously matching and allows us to
> propagate context from get to put without having to modify all the users
> (again!). In particular I need to propagate used open flags to blkdev_put() to
> be able count writeable opens and add support for blocking writes to mounted
> block devices. I'll send that series separately.
> 
> The series is based on Christian's vfs tree as of today as there is quite
> some overlap. Patches have passed some reasonable testing - I've tested block
> changes, md, dm, bcache, xfs, btrfs, ext4, swap. More testing or review is
> always welcome. Thanks! I've pushed out the full branch to:
> 
> git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs.git bdev_handle
> 
> to ease review / testing. Since there were not many comments for v2 and
> Christoph has acked the series I think we should start discussing how to merge
> the series. Most collisions with this series seem to happen in the filesystems
> area so VFS tree would seem as the least painful way to merge this. Jens,

I really do like this series especially struct bdev_handle and moving
the mode bits in there. I'll happily take this. So far there have only
been minor things that can easily be fixed.

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