From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jan Kara Subject: Re: [PATCH v3 0/29] block: Make blkdev_get_by_*() return handle Date: Mon, 28 Aug 2023 19:07:44 +0200 Message-ID: <20230828170744.iifdmaw732cfiauf@quack3> References: <20230818123232.2269-1-jack@suse.cz> <20230825-hubraum-gedreht-8c5c4db9330a@brauner> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_rsa; t=1693242465; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=gY+yGRa61TK2BR8Nw1XPStAseZID7tr6EzNodmZtwGI=; b=qVtknFwaytxobpauxbbKFuuIVi6tPH4Iq6U6De70imbcWuGOxhftHNb/4FbPSlc5GK5oK7 GshsV6S1hXqpxSKPutaEa7H9BjX/0wslT8a/D4qnl6I13zhL54OxmZm3biLLUgjj3B0284 RPao+ZPH1kv8DfDq9EfFHRPOBMpXacI= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_ed25519; t=1693242465; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=gY+yGRa61TK2BR8Nw1XPStAseZID7tr6EzNodmZtwGI=; b=R3UkEJ5CJtN+ADS2q+nxkKoBRTSfFifpdVN9hgBj3Kx2evg21jSoeC6uq7LeWXoMGsRfiN pZDyCc1pRe5jtEDQ== Content-Disposition: inline In-Reply-To: <20230825-hubraum-gedreht-8c5c4db9330a@brauner> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: drbd-dev-bounces-cunTk1MwBs8qoQakbn7OcQ@public.gmane.org Errors-To: drbd-dev-bounces-cunTk1MwBs8qoQakbn7OcQ@public.gmane.org To: Christian Brauner Cc: Dave Kleikamp , jfs-discussion-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org, Jan Kara , "Darrick J. Wong" , linux-nvme-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, Joseph Qi , dm-devel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, target-devel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-mtd-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, Jack Wang , Alasdair Kergon , drbd-dev-cunTk1MwBs8qoQakbn7OcQ@public.gmane.org, linux-s390-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-nilfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-scsi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Sergey Senozhatsky , Christoph Hellwig , xen-devel-GuqFBffKawtpuQazS67q72D2FQJk+8+b@public.gmane.org, Gao Xiang , Christian Borntraeger , Kent Overstreet , Sven Schnelle , linux-pm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Mike Snitzer , Chao Yu , Joern Engel , re On Fri 25-08-23 15:32:47, Christian Brauner wrote: > 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. Thanks. Since Al is fine with just doing a potential conversion to 'struct file' as a handle on top of this series (it will be dumb Coccinelle replacement) I think we can go ahead with the series as is. As you said there will be some conflicts in btrfs and I've learned about f2fs conflicts as well so I can rebase & repost the series on top of rc1 to make life easier for you. Honza -- Jan Kara SUSE Labs, CR