linux-kernel - Re: [PATCH v10 02/17] file: Export receive

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Message-ID: <CACycT3sdx8nA8fh3pjO_=pbiM+Bs5y+h4fuGkFQEsRSaBnph7Q@mail.gmail.com>
Date:   Tue, 3 Aug 2021 17:01:57 +0800
From:   Yongji Xie <xieyongji@...edance.com>
To:     Jason Wang <jasowang@...hat.com>
Cc:     "Michael S. Tsirkin" <mst@...hat.com>,
        Stefan Hajnoczi <stefanha@...hat.com>,
        Stefano Garzarella <sgarzare@...hat.com>,
        Parav Pandit <parav@...dia.com>,
        Christoph Hellwig <hch@...radead.org>,
        Christian Brauner <christian.brauner@...onical.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Matthew Wilcox <willy@...radead.org>,
        Al Viro <viro@...iv.linux.org.uk>,
        Jens Axboe <axboe@...nel.dk>, bcrl@...ck.org,
        Jonathan Corbet <corbet@....net>,
        Mika Penttilä <mika.penttila@...tfour.com>,
        Dan Carpenter <dan.carpenter@...cle.com>, joro@...tes.org,
        Greg KH <gregkh@...uxfoundation.org>,
        He Zhe <zhe.he@...driver.com>,
        Liu Xiaodong <xiaodong.liu@...el.com>,
        Joe Perches <joe@...ches.com>, songmuchun@...edance.com,
        virtualization <virtualization@...ts.linux-foundation.org>,
        netdev@...r.kernel.org, kvm <kvm@...r.kernel.org>,
        linux-fsdevel@...r.kernel.org, iommu@...ts.linux-foundation.org,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v10 02/17] file: Export receive_fd() to modules

On Tue, Aug 3, 2021 at 3:46 PM Jason Wang <jasowang@...hat.com> wrote:
>
>
> 在 2021/7/29 下午3:34, Xie Yongji 写道:
> > Export receive_fd() so that some modules can use
> > it to pass file descriptor between processes without
> > missing any security stuffs.
> >
> > Signed-off-by: Xie Yongji <xieyongji@...edance.com>
> > ---
> >   fs/file.c            | 6 ++++++
> >   include/linux/file.h | 7 +++----
> >   2 files changed, 9 insertions(+), 4 deletions(-)
> >
> > diff --git a/fs/file.c b/fs/file.c
> > index 86dc9956af32..210e540672aa 100644
> > --- a/fs/file.c
> > +++ b/fs/file.c
> > @@ -1134,6 +1134,12 @@ int receive_fd_replace(int new_fd, struct file *file, unsigned int o_flags)
> >       return new_fd;
> >   }
> >
> > +int receive_fd(struct file *file, unsigned int o_flags)
> > +{
> > +     return __receive_fd(file, NULL, o_flags);
>
>
> Any reason that receive_fd_user() can live in the file.h?
>

Since no modules use it.

Thanks,
Yongji