netdev - Re: [PATCH v2] vsock.7: document VSOCK socket address family

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Date:   Tue, 12 Dec 2017 09:23:10 +0000
From:   Stefan Hajnoczi <stefanha@...hat.com>
To:     "Michael Kerrisk (man-pages)" <mtk.manpages@...il.com>
Cc:     linux-man@...r.kernel.org, netdev@...r.kernel.org,
        Jorgen Hansen <jhansen@...are.com>,
        "G. Branden Robinson" <g.branden.robinson@...il.com>,
        Dexuan Cui <decui@...rosoft.com>
Subject: Re: [PATCH v2] vsock.7: document VSOCK socket address family

On Mon, Dec 11, 2017 at 08:32:20PM +0100, Michael Kerrisk (man-pages) wrote:
> On 12/05/2017 11:56 AM, Stefan Hajnoczi wrote:
> > +Data is transferred using the usual
> > +.BR send (2)
> > +and
> > +.BR recv (2)
> 
> Or equally, write(2) and read(2), right? By failing to mention those, the
> text subtly implies that send(2) and recv(2) are preferred, but I don't
> suppose that is true.
> 
> > +family of socket system calls.

Yes, this file descriptor is a socket so write(2) and read(2) work.

I said "family of socket system calls" to avoid listing all the
variations of send(2), sendmsg(2), sendfile(2), sendmmsg(2), etc but I
guess that doesn't include the read(2)/write(2) family of syscalls
(readv(2)/writev(2)).

Will send a follow-up patch to clarify this.

> > +.B EOPNOTSUPP
> > +Operation not supported.  This includes:
> > +the
> > +.B MSG_OOB
> > +flag that is not implemented for
> > +.BR sendmsg (2)
> > +and
> > +.B MSG_PEEK
> > +for
> > +.BR recvmsg (2).
> 
> So these errors might also occur for send() and recv(), right?

Yes, I'll change this to "the send(2) family of syscalls" and "recv(2)
family of syscalls", respectively.

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