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

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Date:   Wed, 4 Aug 2021 16:27:42 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Yongji Xie <xieyongji@...edance.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


在 2021/8/3 下午5:01, Yongji Xie 写道:
> 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


Ok.


Acked-by: Jason Wang <jasowang@...hat.com>


>