Re: [PATCH v12 01/26] securityfs: rework dentry creation

[Stefan Berger]

On 5/10/22 06:25, Christian Brauner wrote:
> On Mon, May 09, 2022 at 02:54:14PM -0500, Serge Hallyn wrote:
> > On Wed, Apr 20, 2022 at 10:06:08AM -0400, Stefan Berger wrote:
> > > From: Christian Brauner <brauner@xxxxxxxxxx>
> > >
> > > When securityfs creates a new file or directory via
> > > securityfs_create_dentry() it will take an additional reference on the
> > > newly created dentry after it has attached the new inode to the new
> > > dentry and added it to the hashqueues.
> > > If we contrast this with debugfs which has the same underlying logic as
> > > securityfs. It uses a similar pairing as securityfs. Where securityfs
> > > has the securityfs_create_dentry() and securityfs_remove() pairing,
> > > debugfs has the __debugfs_create_file() and debugfs_remove() pairing.
> > >
> > > In contrast to securityfs, debugfs doesn't take an additional reference
> > > on the newly created dentry in __debugfs_create_file() which would need
> > > to be put in debugfs_remove().
> > >
> > > The additional dget() isn't a problem per se. In the current
> > > implementation of securityfs each created dentry pins the filesystem via
> >
> > Is 'via' an extra word here or is there a missing word?
> >
> > I'll delay the rest of my response as the missing word may answer my
> > remaining question :)
>
> It can be both. It should either be removed or it should be followed by
> "securityfs_create_dentry()". securityfs_create_dentry() takes two

I am adding "securityfs_create_dentry()" to the text.