Re: [Qemu-devel] [PATCH v3] socket: allow wait=false for client socket

[Marc-André Lureau]

On Mon, Apr 15, 2019 at 6:27 PM Daniel P. Berrangé <address@hidden> wrote:
>
> On Mon, Apr 15, 2019 at 06:21:29PM +0200, Marc-André Lureau wrote:
> > Commit 767abe7 ("chardev: forbid 'wait' option with client sockets")
> > is a bit too strict. Current libvirt always set wait=false, and will
> > thus fail to add client chardev.
> >
> > Make the code more permissive, allowing wait=false with client socket
> > chardevs. Deprecate usage of 'wait' with client sockets.
> >
> > Fixes: 767abe7f49e8be14d29da5db3527817b5d696a52
> > Cc: Daniel P. Berrangé <address@hidden>
> > Signed-off-by: Marc-André Lureau <address@hidden>
> > ---
> >  chardev/char-socket.c | 10 +++++++---
> >  qemu-deprecated.texi  |  5 +++++
> >  2 files changed, 12 insertions(+), 3 deletions(-)
> >
> > diff --git a/chardev/char-socket.c b/chardev/char-socket.c
> > index 3916505d67..ebc1adb83e 100644
> > --- a/chardev/char-socket.c
> > +++ b/chardev/char-socket.c
> > @@ -1263,9 +1263,13 @@ static bool 
> > qmp_chardev_validate_socket(ChardevSocket *sock,
> >              return false;
> >          }
> >          if (sock->has_wait) {
> > -            error_setg(errp, "%s",
> > -                       "'wait' option is incompatible with "
> > -                       "socket in client connect mode");
> > +            warn_report("'wait' option is deprecated with "
> > +                        "socket in client connect mode");
> > +            if (sock->wait) {
> > +                error_setg(errp, "%s",
> > +                           "'wait' option is incompatible with "
> > +                           "socket in client connect mode");
> > +            }
> >              return false;
>
> Oh wait, don't you need to put the 'return false' inside the
> if branch above, otherwise we're still failing validation.

indeed, v4 on the way

>
> >          }
> >      }
> > diff --git a/qemu-deprecated.texi b/qemu-deprecated.texi
> > index 2219386769..842e71b11d 100644
> > --- a/qemu-deprecated.texi
> > +++ b/qemu-deprecated.texi
> > @@ -105,6 +105,11 @@ details.
> >  The ``query-events'' command has been superseded by the more powerful
> >  and accurate ``query-qmp-schema'' command.
> >
> > address@hidden chardev client socket with 'wait' option (since 4.0)
> > +
> > +Character devices creating sockets in client mode should not specify
> > +the 'wait' field, which is only applicable to sockets in server mode
> > +
> >  @section Human Monitor Protocol (HMP) commands
> >
> >  @subsection The hub_id parameter of 'hostfwd_add' / 'hostfwd_remove' 
> > (since 3.1)
> > --
> > 2.21.0.313.ge35b8cb8e2
> >
>
> Regards,
> Daniel
> --
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