Re: [dpdk-dev] [PATCH 2/2] net/failsafe: fix primary/secondary mutex

[Stephen Hemminger <stephen@networkplumber.org>]

On Tue, 8 Jun 2021 11:00:37 +0300
Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru> wrote:

> On 4/19/21 8:08 PM, Thomas Monjalon wrote:
> > About the title, better to speak about multi-process,
> > it is less confusing than primary/secondary.
> > 
> > 15/03/2021 20:27, Stephen Hemminger:  
> >> Set mutex used in failsafe driver to protect when used by
> >> both primary and secondary process. Without this fix, the failsafe
> >> lock is not really locking when there are multiple secondary processes.
> >>
> >> Bugzilla ID: 662
> >> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
> >> Fixes: 655fcd68c7d2 ("net/failsafe: fix hotplug races")
> >> Cc: matan@mellanox.com  
> > 
> > The correct order for above lines is:
> > 
> > Bugzilla ID: 662
> > Fixes: 655fcd68c7d2 ("net/failsafe: fix hotplug races")
> > 
> > Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
> >   
> >> ---
> >> --- a/drivers/net/failsafe/failsafe.c
> >> +++ b/drivers/net/failsafe/failsafe.c
> >> @@ -140,6 +140,11 @@ fs_mutex_init(struct fs_priv *priv)
> >>  		ERROR("Cannot initiate mutex attributes - %s", strerror(ret));
> >>  		return ret;
> >>  	}
> >> +	/* Allow mutex to protect primary/secondary */
> >> +	ret = pthread_mutexattr_setpshared(&attr, PTHREAD_PROCESS_SHARED);
> >> +	if (ret)
> >> +		ERROR("Cannot set mutex shared - %s", strerror(ret));  
> > 
> > Why not returning an error here?  
> 
> +1
> 
> I think it would be safer to return an error here.

Ok but it never happens.