[PATCH v2] fabrics: ensure zero kato for non-persistent controllers

[George, Martin]

Ping?

> Add a helper function that sets the default kato value for the
> controllers. Along with ensuring a non-zero kato value (i.e.
> NVMF_DEF_DISC_TMO) is passed to a persistent discovery controller,
> it also ensures a zero kato is passed to a non-persistent discovery
> controller.
> 
> Signed-off-by: Martin George <marting at netapp.com>
> ---
>  fabrics.c | 16 ++++++++++++----
>  1 file changed, 12 insertions(+), 4 deletions(-)
> 
> diff --git a/fabrics.c b/fabrics.c
> index e38657e..c780040 100644
> --- a/fabrics.c
> +++ b/fabrics.c
> @@ -918,6 +918,16 @@ static int build_options(char *argstr, int
> max_len, bool discover)
>         return 0;
>  }
> 
> +static void set_kato(struct config *cfg)
> +{
> +       /* Set kato to NVMF_DEF_DISC_TMO for persistent discovery
> controllers */
> +       if (cfg->persistent && !cfg->keep_alive_tmo)
> +               cfg->keep_alive_tmo = NVMF_DEF_DISC_TMO;
> +       /* Set kato to zero for non-persistent discovery controllers
> */
> +       else if (!cfg->persistent && (cfg->keep_alive_tmo > 0))
> +               cfg->keep_alive_tmo = 0;
> +}
> +
>  static void discovery_trsvcid(struct config *cfg)
>  {
>         if (!strcmp(cfg->transport, "tcp")) {
> @@ -1401,8 +1411,7 @@ static int discover_from_conf_file(const char
> *desc, char *argstr,
>                 if (err)
>                         goto free_and_continue;
> 
> -               if (cfg.persistent && !cfg.keep_alive_tmo)
> -                       cfg.keep_alive_tmo = NVMF_DEF_DISC_TMO;
> +               set_kato(&cfg);
> 
>                 if (traddr_is_hostname(&cfg)) {
>                         ret = hostname2traddr(&cfg);
> @@ -1476,8 +1485,7 @@ int fabrics_discover(const char *desc, int
> argc, char **argv, bool connect)
>         if (!cfg.transport && !cfg.traddr) {
>                 ret = discover_from_conf_file(desc, argstr, opts,
> connect);
>         } else {
> -               if (cfg.persistent && !cfg.keep_alive_tmo)
> -                       cfg.keep_alive_tmo = NVMF_DEF_DISC_TMO;
> +               set_kato(&cfg);
> 
>                 if (traddr_is_hostname(&cfg)) {
>                         ret = hostname2traddr(&cfg);
> --
> 2.30.0
>