Re: [Linux-ATM-General] Sync status in userspace

[chas w. - C. <ch...@cm...>]

sorry i mispoke.  i meant net/atm/br2684.c not the userspace control
program.  like i said, i dont know of a way to get those atm events to
a user space process.  you would need to add something like
netevents/rt-netlink.

On Mon, 13 Sep 2010 13:33:31 -0700
Philip Prindeville <phi...@re...> wrote:

>   I looked in br2684ctl.c but didn't see (at least not in 2.5.1)
> where carrier events were handled.  What am I missing?  I'd like to
> port carrier transition handling to the PPP daemon for use with the
> rp-pppoe and pppoatm userspace plugins.
> 
> I looked in atm/br2684.c and noticed that it registers a notifier,
> which it then uses to detect ATM_PHY_SIG_* events...
> 
> atm/pppoatm.c has no such support, but I don't think it would be that
> hard to add it.
> 
> As for your comment, not sure I get it.  I thought that netlink
> messages were agnostic (at least for the sender) about whether the
> listener was in kernel or userspace?
> 
> 
> On 9/13/10 10:16 AM, chas williams - CONTRACTOR wrote:
> > in the kernel yes, but i dont know if there is a userspace
> > mechanism to watch for this kind of thing.  as mentioned br2684ctl
> > shows you how to watch for carrier changes in the kernel.
> >
> > On Mon, 13 Sep 2010 09:05:05 -0700
> > Philip Prindeville<phi...@re...>  wrote:
> >
> >>    So I can't use rtnetlink RTM_NEWLINK messages to monitor state
> >> changes?
> >>
> >>
> >> On 9/13/10 8:29 AM, chas williams - CONTRACTOR wrote:
> >>> this patch added event monitoring for the carrier/line status.  it
> >>> also fixed some assumptions about the carrier state.  carrier is
> >>> now assumed to be UP (it used to be not well defined) unless the
> >>> hardware is capable of updating the state.  userspace can
> >>> determine the carrier status by examining /sys/class/atm/<device
> >>> instance>/carrier.  we dont have an ioctl or ethtool type
> >>> instance>interface to get this data.
> >>>
> >>> On Mon, 13 Sep 2010 09:30:16 +0200
> >>> Karl Hiramoto<ka...@hi...>   wrote:
> >>>
> >>>>     On 13/09/2010 6:32, Philip Prindeville wrote:
> >>>>>     I think a few weeks ago I saw a patch fly by on
> >>>>> linux-kernel on signaling sync status from the DSL driver to an
> >>>>> upper layer, with the remark that it would be useful to
> >>>>> userspace. There's something there.
> >>>>>
> >>>>> Ciao.
> >>>>> Vincent.
> >>>>>
> >>>>> I'm not on linux-kernel but I'll check gmane... Thanks.
> >>>>>
> >>>>> Actually, just checked but couldn't find it.  If you remember
> >>>>> who wrote it or what the subject was, that would help a lot...
> >>>>>
> >>>>>
> >>>> I wrote the patch.  It should be in this list's archives and the
> >>>> netdev list at the beginning of july.  The patches are in
> >>>> mainline now, but only work on br2684 VCs so it passes the
> >>>> LOWER_UP flag.
> >>>>
> >>>> The patches are in mainline now see commits
> >>>> 49d49106fc6cbb48c832aa58e3e6cee8b49d5e8f,
> >>>> 7313bb8f3dd6e28bcf9c42adfd54a5cf9a4949e0,
> >>>> 005066122b58f3b350736cc896af46aea2e32d23,  and others for each
> >>>> device.
> >>>>
> >>>> --
> >>>> Karl
>