[dm-devel] [PATCH 01/21] libmultipath: sysfs_set_scsi_tmo: do nothing for ACT_DRY_RUN

[Benjamin Marzinski]

On Fri, Sep 01, 2023 at 08:02:14PM +0200, mwilck at suse.com wrote:
> From: Martin Wilck <mwilck at suse.com>
> 
> "multipath -d" might change sysfs timeouts of SCSI devices.
> Make sure it doesn't.
> 
Reviewed-by: Benjamin Marzinski <bmarzins at redhat.com>
> Signed-off-by: Martin Wilck <mwilck at suse.com>
> Cc: Jehan Singh <jehan.singh at suse.com>
> ---
>  libmultipath/configure.c | 4 ++--
>  libmultipath/discovery.c | 3 +++
>  2 files changed, 5 insertions(+), 2 deletions(-)
> 
> diff --git a/libmultipath/configure.c b/libmultipath/configure.c
> index 9513baa..029fbbd 100644
> --- a/libmultipath/configure.c
> +++ b/libmultipath/configure.c
> @@ -1193,13 +1193,13 @@ int coalesce_paths (struct vectors *vecs, vector mpvec, char *refwwid,
>  
>  		if (cmpp)
>  			mpp->queue_mode = cmpp->queue_mode;
> +		if (cmd == CMD_DRY_RUN && mpp->action == ACT_UNDEF)
> +			mpp->action = ACT_DRY_RUN;
>  		if (setup_map(mpp, &params, vecs)) {
>  			remove_map(mpp, vecs->pathvec, NULL);
>  			continue;
>  		}
>  
> -		if (cmd == CMD_DRY_RUN)
> -			mpp->action = ACT_DRY_RUN;
>  		if (mpp->action == ACT_UNDEF)
>  			select_action(mpp, curmp,
>  				      force_reload == FORCE_RELOAD_YES ? 1 : 0);
> diff --git a/libmultipath/discovery.c b/libmultipath/discovery.c
> index e4de48e..84ce5fe 100644
> --- a/libmultipath/discovery.c
> +++ b/libmultipath/discovery.c
> @@ -857,6 +857,9 @@ sysfs_set_scsi_tmo (struct config *conf, struct multipath *mpp)
>  	bool warn_dev_loss = false;
>  	bool warn_fast_io_fail = false;
>  
> +	if (mpp->action == ACT_DRY_RUN || mpp->action == ACT_REJECT)
> +		return 0;
> +
>  	if (mpp->no_path_retry > 0) {
>  		uint64_t no_path_retry_tmo =
>  			(uint64_t)mpp->no_path_retry * conf->checkint;
> -- 
> 2.41.0