Re: [dm-devel] RDAC path checker status change messages

[Chandra Seetharaman <sekharan us ibm com>]

Yes, I agree... Your patch should work as you expect.

Thanks

chandra
On Wed, 2009-06-24 at 16:19 -0400, Charlie Brady wrote:
> On Wed, 24 Jun 2009, Chandra Seetharaman wrote:
> 
> > We do not want to print these messages as they will be flooding
> > your /var/log/messages even when everything is good.
> 
> Agreed.
> 
> > We want to print these messages only to get User's attention.
> 
> Agreed.
> 
> > If your concern is that the last message is "down", then we should be
> > having a static variable and print up or ghost message only once (when
> > we toggle from down to up/ghost).
> 
> You do have a static variable, so that messages are only printed when the 
> status changes. However, because of the missing MSG() calls when the 
> status is PATH_UP and PATH_GHOST, then the string printed is "path down", 
> when it should be "path up" or "path ghost".
> 
> I believe that the patch is good. The MSG() calls will change the message 
> string, and then the higher layer will notice the status change, and print 
> the message.
> 
> Please check the code and correct me if I am wrong.
> 
> >
> > chandra
> > On Tue, 2009-06-23 at 15:50 -0400, Charlie Brady wrote:
> >> It seems to me that this patch is required, to fix a problem with "path
> >> down" messages being logged when the path transitions to up (and
> >> presumably ghost).
> >>
> >> --- libcheckers/rdac.c.orig     2009-06-23 15:38:05.371422000 -0400
> >> +++ libcheckers/rdac.c  2009-06-23 15:39:28.020843000 -0400
> >> @@ -105,5 +105,12 @@
> >>                  return PATH_DOWN;
> >>          }
> >>
> >> -       return ((inq.avtcvp & 0x1) ? PATH_UP : PATH_GHOST);
> >> +       if (inq.avtcvp & 0x1) {
> >> +               MSG(c, MSG_RDAC_UP);
> >> +               return PATH_UP;
> >> +       }
> >> +       else {
> >> +               MSG(c, MSG_RDAC_GHOST);
> >> +               return PATH_GHOST;
> >> +       }
> >>   }
> >>
> >> --
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> >
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