On Wed, Apr 27, 2016 at 01:10:50PM +0200, Hannes Reinecke wrote:
> When the daemon is started prior to udev the paths are not present
> (yet). However, the maps themselves will be read from device-mapper.
> This causes existing maps to be dropped in coalesce_maps(), only
> to be reinstated later when all paths are discovered.
> To avoid this we should be checking for a valid hardware entry
> per multipath map; if there is none we're in startup and shouldn't
> drop any maps.
This doesn't just skip maps when udev hasn't started yet. It skips any
blacklisted maps. For instance, if you create some multipath devices,
add the lines
blacklist {
devnode ".*"
}
to /etc/multipath.conf, and restart or reload multipathd, all the
blacklisted devices are still there.
NAK
-Ben
>
> Signed-off-by: Hannes Reinecke
> ---
> multipathd/main.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/multipathd/main.c b/multipathd/main.c
> index 1141fb6..33a3503 100644
> --- a/multipathd/main.c
> +++ b/multipathd/main.c
> @@ -155,7 +155,7 @@ coalesce_maps(struct vectors *vecs, vector nmpv)
>
> vector_foreach_slot (ompv, ompp, i) {
> condlog(3, "%s: coalesce map", ompp->alias);
> - if (!find_mp_by_wwid(nmpv, ompp->wwid)) {
> + if (ompp->hwe && !find_mp_by_wwid(nmpv, ompp->wwid)) {
> /*
>* remove all current maps not allowed by the
>* current configuration
> --
> 2.6.6
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