linux-kernel - Re: [PATCH v13 03/13] file: Export receive

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Message-ID: <YTTz8PAcRSXMAdJ+@zeniv-ca.linux.org.uk>
Date:   Sun, 5 Sep 2021 16:44:32 +0000
From:   Al Viro <viro@...iv.linux.org.uk>
To:     "Michael S. Tsirkin" <mst@...hat.com>
Cc:     Xie Yongji <xieyongji@...edance.com>, jasowang@...hat.com,
        stefanha@...hat.com, sgarzare@...hat.com, parav@...dia.com,
        hch@...radead.org, christian.brauner@...onical.com,
        rdunlap@...radead.org, willy@...radead.org, axboe@...nel.dk,
        bcrl@...ck.org, corbet@....net, mika.penttila@...tfour.com,
        dan.carpenter@...cle.com, joro@...tes.org,
        gregkh@...uxfoundation.org, zhe.he@...driver.com,
        xiaodong.liu@...el.com, joe@...ches.com, robin.murphy@....com,
        will@...nel.org, john.garry@...wei.com, songmuchun@...edance.com,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        kvm@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v13 03/13] file: Export receive_fd() to modules

On Sun, Sep 05, 2021 at 11:57:22AM -0400, Michael S. Tsirkin wrote:
> On Tue, Aug 31, 2021 at 06:36:24PM +0800, Xie Yongji wrote:
> > 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>
> > Acked-by: Jason Wang <jasowang@...hat.com>
> 
> This needs some acks from fs devels.
> Viro?

*shrug*

I still think that having random ioctls messing with descriptor table
is a bad idea, and I'm not thrilled with the way it's currently
factored, but we can change that later.