Re: [PATCH v4 12/20] multipath -u: change output to environment/key format

["Benjamin Marzinski" <bmarzins@redhat.com>]

On Wed, Apr 04, 2018 at 06:16:19PM +0200, Martin Wilck wrote:
> ... instead of free format. This provides more flexibility
> for udev rule processing for the future. Adapt code in multipath.rules.
> The exit status remains as usual. This affects "multipath -c", too.
> 
> The parameters "pathvec" and "conf" for print_cmd_valid are currently
> unused, but will be in follow-up patches.
> 
Reviewed-by: Benjamin Marzinski <bmarzins@redhat.com>
> Signed-off-by: Martin Wilck <mwilck@suse.com>
> ---
>  multipath/main.c          | 14 ++++++++------
>  multipath/multipath.rules |  6 +++---
>  2 files changed, 11 insertions(+), 9 deletions(-)
> 
> diff --git a/multipath/main.c b/multipath/main.c
> index bf28735..59a72ed 100644
> --- a/multipath/main.c
> +++ b/multipath/main.c
> @@ -350,13 +350,15 @@ out:
>  	return r;
>  }
>  
> -static int print_cmd_valid(const char *devpath, int k)
> +static int print_cmd_valid(int k, const vector pathvec,
> +			   struct config *conf)
>  {
> -	if (k < 0 || k > 1)
> +	static const int vals[] = { 1, 0 };
> +
> +	if (k < 0 || k >= sizeof(vals))
>  		return 1;
>  
> -	printf("%s is%s a valid multipath device path\n",
> -	       devpath, k ? "" : " not");
> +	printf("DM_MULTIPATH_DEVICE_PATH=\"%d\"\n", vals[k]);
>  	return k == 1;
>  }
>  
> @@ -514,7 +516,7 @@ configure (struct config *conf, enum mpath_cmds cmd,
>  
>  print_valid:
>  	if (cmd == CMD_VALID_PATH)
> -		r = print_cmd_valid(devpath, r);
> +		r = print_cmd_valid(r, pathvec, conf);
>  
>  out:
>  	if (refwwid)
> @@ -851,7 +853,7 @@ main (int argc, char *argv[])
>  		if (fd == -1) {
>  			condlog(3, "%s: daemon is not running", dev);
>  			if (!systemd_service_enabled(dev)) {
> -				r = print_cmd_valid(dev, 1);
> +				r = print_cmd_valid(1, NULL, conf);
>  				goto out;
>  			}
>  		} else
> diff --git a/multipath/multipath.rules b/multipath/multipath.rules
> index 6f8ee2b..aab64dc 100644
> --- a/multipath/multipath.rules
> +++ b/multipath/multipath.rules
> @@ -19,9 +19,9 @@ LABEL="test_dev"
>  ENV{MPATH_SBIN_PATH}="/sbin"
>  TEST!="$env{MPATH_SBIN_PATH}/multipath", ENV{MPATH_SBIN_PATH}="/usr/sbin"
>  
> -ENV{DM_MULTIPATH_DEVICE_PATH}!="1", \
> -	PROGRAM=="$env{MPATH_SBIN_PATH}/multipath -u %k", \
> -	ENV{DM_MULTIPATH_DEVICE_PATH}="1", ENV{ID_FS_TYPE}="mpath_member", \
> +# multipath -u sets DM_MULTIPATH_DEVICE_PATH
> +ENV{DM_MULTIPATH_DEVICE_PATH}!="1", IMPORT{program}="$env{MPATH_SBIN_PATH}/multipath -u %k"
> +ENV{DM_MULTIPATH_DEVICE_PATH}=="1", ENV{ID_FS_TYPE}="mpath_member", \
>  	ENV{SYSTEMD_READY}="0"
>  
>  LABEL="end_mpath"
> -- 
> 2.16.1