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Re: [PATCH RFC 0/32] block: Make blkdev_get_by_*() return handle
- To: Jan Kara <jack@xxxxxxx>
- From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
- Date: Thu, 6 Jul 2023 07:54:51 -0700
- Cc: linux-block@xxxxxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, Jens Axboe <axboe@xxxxxxxxx>, Christoph Hellwig <hch@xxxxxxxxxxxxx>, Alasdair Kergon <agk@xxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Anna Schumaker <anna@xxxxxxxxxx>, Chao Yu <chao@xxxxxxxxxx>, Christian Borntraeger <borntraeger@xxxxxxxxxxxxx>, "Darrick J. Wong" <djwong@xxxxxxxxxx>, Dave Kleikamp <shaggy@xxxxxxxxxx>, David Sterba <dsterba@xxxxxxxx>, dm-devel@xxxxxxxxxx, drbd-dev@xxxxxxxxxxxxxxxx, Gao Xiang <xiang@xxxxxxxxxx>, Jack Wang <jinpu.wang@xxxxxxxxx>, Jaegeuk Kim <jaegeuk@xxxxxxxxxx>, jfs-discussion@xxxxxxxxxxxxxxxxxxxxx, Joern Engel <joern@xxxxxxxxxxxxxxx>, Joseph Qi <joseph.qi@xxxxxxxxxxxxxxxxx>, Kent Overstreet <kent.overstreet@xxxxxxxxx>, linux-bcache@xxxxxxxxxxxxxxx, linux-btrfs@xxxxxxxxxxxxxxx, linux-erofs@xxxxxxxxxxxxxxxx, linux-ext4@xxxxxxxxxxxxxxx, linux-f2fs-devel@xxxxxxxxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linux-mtd@xxxxxxxxxxxxxxxxxxx, linux-nfs@xxxxxxxxxxxxxxx, linux-nilfs@xxxxxxxxxxxxxxx, linux-nvme@xxxxxxxxxxxxxxxxxxx, linux-pm@xxxxxxxxxxxxxxx, linux-raid@xxxxxxxxxxxxxxx, linux-s390@xxxxxxxxxxxxxxx, linux-scsi@xxxxxxxxxxxxxxx, linux-xfs@xxxxxxxxxxxxxxx, "Md. Haris Iqbal" <haris.iqbal@xxxxxxxxx>, Mike Snitzer <snitzer@xxxxxxxxxx>, Minchan Kim <minchan@xxxxxxxxxx>, ocfs2-devel@xxxxxxxxxxxxxx, reiserfs-devel@xxxxxxxxxxxxxxx, Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>, Song Liu <song@xxxxxxxxxx>, Sven Schnelle <svens@xxxxxxxxxxxxx>, target-devel@xxxxxxxxxxxxxxx, Ted Tso <tytso@xxxxxxx>, Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Thu, 06 Jul 2023 14:56:10 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Tue, Jul 04, 2023 at 02:21:27PM +0200, Jan Kara wrote:
> Hello,
>
> this patch series 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 Linus' tree as of yesterday + two bcache fixes which
> are
> in the block tree. Patches have passed some basic testing, I plan to test more
> users once we agree this is the right way to go.
Can you post a link to a git branch for this and the follow up series?
Especially with a fairly unstable base it's kinda hard to look at the
result otherwise.
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