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Re: [Qemu-block] [PATCH v2] ssh: switch from libssh2 to libssh
From: |
Richard W.M. Jones |
Subject: |
Re: [Qemu-block] [PATCH v2] ssh: switch from libssh2 to libssh |
Date: |
Fri, 21 Oct 2016 16:39:17 +0100 |
User-agent: |
Mutt/1.5.20 (2009-12-10) |
On Fri, Oct 21, 2016 at 05:30:39PM +0200, Pino Toscano wrote:
> On Friday, 21 October 2016 13:02:21 CEST Richard W.M. Jones wrote:
> > On Fri, Oct 21, 2016 at 01:16:11PM +0200, Pino Toscano wrote:
> > > Rewrite the implementation of the ssh block driver to use libssh instead
> > > of libssh2. The libssh library has various advantages over libssh2:
> > > - easier API for authentication (for example for using ssh-agent)
> > > - easier API for known_hosts handling
> > > - supports newer types of keys in known_hosts
> > >
> > > Kerberos authentication can be enabled once the libssh bug for it [1] is
> > > fixed.
> > >
> > > The development version of libssh (i.e. the future 0.8.x) supports
> > > fsync, so reuse the build time check for this.
> > >
> > > [1] https://red.libssh.org/issues/242
> > >
> > > Signed-off-by: Pino Toscano <address@hidden>
> > > ---
> > >
> > > Changes from v1:
> > > - fixed jumbo packets writing
> > > - fixed missing 'err' assignment
> > > - fixed commit message
> >
> > This version works, but I also switched from using a remote server to
> > using this over localhost.
>
> Could you please give it a try with the remote server case as well?
I tried it and it failed with the remote server. Same kinds of errors
as last time.
> > It seems as if the timeout might be a bit short. Could that be made
> > controllable? Or increased to match whatever libssh2 was using?
>
> Which timeout are you referring to?
Not any particular thing, I just observed that with the remote server
the errors happen quite quickly, and so perhaps there is a shorter
timeout. (libssh2 apparently defaults to unlimited waiting, although
I'm sure there are other timeouts in ssh or TCP which kick in).)
Rich.
--
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