linux-kernel - Re: [PATCH v6 00/15] Create and use APIs to centralise locking for directory ops

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Message-id: <176424189349.634289.4480398011245842622@noble.neil.brown.name>
Date: Thu, 27 Nov 2025 22:11:33 +1100
From: NeilBrown <neilb@...mail.net>
To: "Christian Brauner" <brauner@...nel.org>
Cc: "Jeff Layton" <jlayton@...nel.org>,
 "Alexander Viro" <viro@...iv.linux.org.uk>,
 "Amir Goldstein" <amir73il@...il.com>, "Jan Kara" <jack@...e.cz>,
 linux-fsdevel@...r.kernel.org, "Chris Mason" <clm@...com>,
 "David Sterba" <dsterba@...e.com>, "David Howells" <dhowells@...hat.com>,
 "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
 "Rafael J. Wysocki" <rafael@...nel.org>,
 "Danilo Krummrich" <dakr@...nel.org>, "Tyler Hicks" <code@...icks.com>,
 "Miklos Szeredi" <miklos@...redi.hu>,
 "Chuck Lever" <chuck.lever@...cle.com>,
 "Olga Kornievskaia" <okorniev@...hat.com>,
 "Dai Ngo" <Dai.Ngo@...cle.com>, "Namjae Jeon" <linkinjeon@...nel.org>,
 "Steve French" <smfrench@...il.com>,
 "Sergey Senozhatsky" <senozhatsky@...omium.org>,
 "Carlos Maiolino" <cem@...nel.org>,
 "John Johansen" <john.johansen@...onical.com>,
 "Paul Moore" <paul@...l-moore.com>, "James Morris" <jmorris@...ei.org>,
 "Serge E. Hallyn" <serge@...lyn.com>,
 "Stephen Smalley" <stephen.smalley.work@...il.com>,
 "Ondrej Mosnacek" <omosnace@...hat.com>,
 "Mateusz Guzik" <mjguzik@...il.com>,
 "Lorenzo Stoakes" <lorenzo.stoakes@...cle.com>,
 "Stefan Berger" <stefanb@...ux.ibm.com>,
 "Darrick J. Wong" <djwong@...nel.org>, linux-kernel@...r.kernel.org,
 netfs@...ts.linux.dev, ecryptfs@...r.kernel.org,
 linux-nfs@...r.kernel.org, linux-unionfs@...r.kernel.org,
 linux-cifs@...r.kernel.org, linux-xfs@...r.kernel.org,
 linux-security-module@...r.kernel.org, selinux@...r.kernel.org
Subject: Re: [PATCH v6 00/15] Create and use APIs to centralise locking for
 directory ops

On Sat, 15 Nov 2025, Christian Brauner wrote:
> On Fri, Nov 14, 2025 at 01:24:41PM +0100, Christian Brauner wrote:
> > On Thu, Nov 13, 2025 at 11:18:23AM +1100, NeilBrown wrote:
> > > Following is a new version of this series:
> > >  - fixed a bug found by syzbot
> > >  - cleanup suggested by Stephen Smalley
> > >  - added patch for missing updates in smb/server - thanks Jeff Layton
> > 
> > The codeflow right now is very very gnarly in a lot of places which
> > obviously isn't your fault. But start_creating() and end_creating()
> > would very naturally lend themselves to be CLASS() guards.
> > 
> > Unrelated: I'm very inclined to slap a patch on top that renames
> > start_creating()/end_creating() and start_dirop()/end_dirop() to
> > vfs_start_creating()/vfs_end_creating() and
> > vfs_start_dirop()/vfs_end_dirop(). After all they are VFS level
> > maintained helpers and I try to be consistent with the naming in the
> > codebase making it very easy to grep.
> 
> @Neil, @Jeff, could you please look at:
> https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git/log/?h=vfs.all
> 
> and specifically at the merge conflict resolution I did for:
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git/commit/?h=vfs.all&id=f28c9935f78bffe6fee62f7fb9f6c5af7e30d9b2
> 
> and tell me whether it all looks sane?
> 

That merge is a7b062be95fed490d1dcd350d3b5657f243d7d4f today, and I
agree with Jeff that it looks good.

Thanks,
NeilBrown