Re: [dm-devel] [PATCH 7/7] multipath: print sysfs state in fast list mode

[Benjamin Marzinski]

On Thu, Feb 08, 2018 at 10:32:06AM +0100, Martin Wilck wrote:
> Hi Ben,
> 
> On Wed, 2018-02-07 at 16:49 -0600, Benjamin Marzinski wrote:
> > commit b123e711ea2a4b471a98ff5e26815df3773636b5 "libmultipath:
> > cleanup
> > orphan device states" stopped multipathd from showing old state for
> > orphan paths by checking if pp->mpp was set, and only printing the
> > state
> > if it was.   Unfortunately, when "multipath -l" is run, pp->mpp isn't
> > set. While the checker state isn't checked and shouldn't be printed
> > with
> > "-l", the sysfs state can be, and was before b123e711. This patch
> > sets
> > pp->mpp in fast list mode, so that the sysfs state gets printed.
> > 
> > Signed-off-by: Benjamin Marzinski 
> > ---
> >  multipath/main.c | 9 ++---
> >  1 file changed, 6 insertions(+), 3 deletions(-)
> > 
> > diff --git a/multipath/main.c b/multipath/main.c
> > index bffe065..1799fd5 100644
> > --- a/multipath/main.c
> > +++ b/multipath/main.c
> > @@ -149,7 +149,7 @@ usage (char * progname)
> >  }
> >  
> >  static int
> > -update_paths (struct multipath * mpp)
> > +update_paths (struct multipath * mpp, int quick)
> >  {
> > int i, j;
> > struct pathgroup * pgp;
> > @@ -164,6 +164,10 @@ update_paths (struct multipath * mpp)
> > continue;
> >  
> > vector_foreach_slot (pgp->paths, pp, j) {
> > +   if (quick) {
> > +   pp->mpp = mpp;
> > +   continue;
> > +   }
> > if (!strlen(pp->dev)) {
> > if (devt2devname(pp->dev, 
> 
> Shouldn't you check whether the paths are still present in sysfs, like
> the code for the general case (quick == false) does?

Sure. It will make multipath paths that don't exist in sysfs show up
with a checker state of "faulty", instead of "undef" like was previously
the case for all paths in the quick list, but that seems like an
improvement.

> 
> Regards
> Martin
> 
> -- 
> Dr. Martin Wilck , Tel. +49 (0)911 74053 2107
> SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton
> HRB 21284 (AG Nürnberg)

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Re: [dm-devel] [PATCH 7/7] multipath: print sysfs state in fast list mode

[Martin Wilck]

Hi Ben,

On Wed, 2018-02-07 at 16:49 -0600, Benjamin Marzinski wrote:
> commit b123e711ea2a4b471a98ff5e26815df3773636b5 "libmultipath:
> cleanup
> orphan device states" stopped multipathd from showing old state for
> orphan paths by checking if pp->mpp was set, and only printing the
> state
> if it was.   Unfortunately, when "multipath -l" is run, pp->mpp isn't
> set. While the checker state isn't checked and shouldn't be printed
> with
> "-l", the sysfs state can be, and was before b123e711. This patch
> sets
> pp->mpp in fast list mode, so that the sysfs state gets printed.
> 
> Signed-off-by: Benjamin Marzinski 
> ---
>  multipath/main.c | 9 ++---
>  1 file changed, 6 insertions(+), 3 deletions(-)
> 
> diff --git a/multipath/main.c b/multipath/main.c
> index bffe065..1799fd5 100644
> --- a/multipath/main.c
> +++ b/multipath/main.c
> @@ -149,7 +149,7 @@ usage (char * progname)
>  }
>  
>  static int
> -update_paths (struct multipath * mpp)
> +update_paths (struct multipath * mpp, int quick)
>  {
>   int i, j;
>   struct pathgroup * pgp;
> @@ -164,6 +164,10 @@ update_paths (struct multipath * mpp)
>   continue;
>  
>   vector_foreach_slot (pgp->paths, pp, j) {
> + if (quick) {
> + pp->mpp = mpp;
> + continue;
> + }
>   if (!strlen(pp->dev)) {
>   if (devt2devname(pp->dev, 

Shouldn't you check whether the paths are still present in sysfs, like
the code for the general case (quick == false) does?

Regards
Martin

-- 
Dr. Martin Wilck , Tel. +49 (0)911 74053 2107
SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton
HRB 21284 (AG Nürnberg)

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