[RFC PATCH 16/20] libmultipath/print: add "%G - foreign" wildcard

[Martin Wilck <mwilck@suse.com>]

This adds a format field to identify foreign maps as such, and
uses it in default-formatted topology output (generic_style()).

Signed-off-by: Martin Wilck <mwilck@suse.com>
---
 libmultipath/generic.c |  4 +++-
 libmultipath/print.c   | 14 ++++++++++++++
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/libmultipath/generic.c b/libmultipath/generic.c
index 61cbffb708b6..5f74427cb5b1 100644
--- a/libmultipath/generic.c
+++ b/libmultipath/generic.c
@@ -33,7 +33,9 @@ int generic_style(const struct gen_multipath* gm,
 	gm->ops->snprint(gm, wwid_buf, sizeof(wwid_buf), 'w');
 
 	if (strcmp(alias_buf, wwid_buf))
-		n = snprintf(buf, len, " (%%w)");
+		n += snprintf(buf, len, "%%n (%%w) [%%G]");
+	else
+		n += snprintf(buf, len, "%%n [%%G]");
 
 	return (n < len ? n : len - 1);
 }
diff --git a/libmultipath/print.c b/libmultipath/print.c
index 9a5a6a2f4ad6..a6ff6b297b3f 100644
--- a/libmultipath/print.c
+++ b/libmultipath/print.c
@@ -342,6 +342,12 @@ snprint_multipath_rev (char * buff, size_t len, const struct multipath * mpp)
 	return snprintf(buff, len, "##");
 }
 
+static int
+snprint_multipath_foreign (char * buff, size_t len, const struct multipath * pp)
+{
+	return snprintf(buff, len, "%s", "--");
+}
+
 static int
 snprint_action (char * buff, size_t len, const struct multipath * mpp)
 {
@@ -621,6 +627,12 @@ snprint_path_checker (char * buff, size_t len, const struct path * pp)
 	return snprint_str(buff, len, c->name);
 }
 
+static int
+snprint_path_foreign (char * buff, size_t len, const struct path * pp)
+{
+	return snprintf(buff, len, "%s", "--");
+}
+
 struct multipath_data mpd[] = {
 	{'n', "name",          0, snprint_name},
 	{'w', "uuid",          0, snprint_multipath_uuid},
@@ -644,6 +656,7 @@ struct multipath_data mpd[] = {
 	{'v', "vend",          0, snprint_multipath_vend},
 	{'p', "prod",          0, snprint_multipath_prod},
 	{'e', "rev",           0, snprint_multipath_rev},
+	{'G', "foreign",       0, snprint_multipath_foreign},
 	{0, NULL, 0 , NULL}
 };
 
@@ -667,6 +680,7 @@ struct path_data pd[] = {
 	{'R', "host WWPN",     0, snprint_host_wwpn},
 	{'r', "target WWPN",   0, snprint_tgt_wwpn},
 	{'a', "host adapter",  0, snprint_host_adapter},
+	{'G', "foreign",       0, snprint_path_foreign},
 	{0, NULL, 0 , NULL}
 };
 
-- 
2.16.1