Mike Christie wrote:

> Add rbd to hwtable. These defaults are for the HA type of setup
> supported by the checker. We do no support features like multibus
> at the dm-multipath level yet.

Please use this patch as guide:
https://patchwork.kernel.org/patch/9225521/

> Signed-off-by: Mike Christie <[email protected]>
> ---
>  libmultipath/hwtable.c | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
> 
> diff --git a/libmultipath/hwtable.c b/libmultipath/hwtable.c
> index 6116124..27a6ff1 100644
> --- a/libmultipath/hwtable.c
> +++ b/libmultipath/hwtable.c
> @@ -1206,6 +1206,21 @@ static struct hwentry default_hw[] = {
>               .pgfailback    = 30,
>               .minio         = 128,
>       },
> +     {
> +             .vendor        = "Ceph",
> +             .product       = "RBD",
> +             .features      = DEFAULT_FEATURES,
> +             .hwhandler     = DEFAULT_HWHANDLER,
> +             .pgpolicy      = FAILOVER,
> +             .pgfailback    = -FAILBACK_IMMEDIATE,
> +             .no_path_retry = NO_PATH_RETRY_FAIL,
> +             .checker_name  = RBD,
> +             .user_friendly_names = USER_FRIENDLY_NAMES_ON,

USER_FRIENDLY_NAMES_ON is highly inadvisable.

> +             .uid_attribute = "ID_UID",
> +             .prio_name     = PRIO_CONST,
> +             .deferred_remove = DEFERRED_REMOVE_ON,

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