[dm-devel] [PATCH 1/8] libmulitpath: add section name to invalid keyword output

[Benjamin Marzinski]

If users forget the closing brace for a section in multipath.conf,
multipath has no way to detect that. When it sees the keyword at the
start of the next section, it will complain that there is an invalid
keyword, because that keyword doesn't belong in previous section (which
was never ended with a closing brace). This can confuse users. To make
this easier to understand, when multipath prints and invalid keyword
message, it now also prints the current section name, which can give
users a hint that they didn't end the previous section.

Signed-off-by: Benjamin Marzinski <bmarzins at redhat.com>
---
 libmultipath/parser.c | 20 +++++++++++++-------
 1 file changed, 13 insertions(+), 7 deletions(-)

diff --git a/libmultipath/parser.c b/libmultipath/parser.c
index 8ca91bf2..611054f7 100644
--- a/libmultipath/parser.c
+++ b/libmultipath/parser.c
@@ -504,7 +504,7 @@ validate_config_strvec(vector strvec, const char *file)
 
 static int
 process_stream(struct config *conf, FILE *stream, vector keywords,
-	       const char *file)
+	       const char *section, const char *file)
 {
 	int i;
 	int r = 0, t;
@@ -568,16 +568,22 @@ process_stream(struct config *conf, FILE *stream, vector keywords,
 				if (keyword->sub) {
 					kw_level++;
 					r += process_stream(conf, stream,
-							    keyword->sub, file);
+							    keyword->sub,
+							    keyword->string,
+							    file);
 					kw_level--;
 				}
 				break;
 			}
 		}
-		if (i >= VECTOR_SIZE(keywords))
-			condlog(1, "%s line %d, invalid keyword: %s",
-				file, line_nr, str);
-
+		if (i >= VECTOR_SIZE(keywords)) {
+			if (section)
+				condlog(1, "%s line %d, invalid keyword in the %s section: %s",
+					file, line_nr, section, str);
+			else
+				condlog(1, "%s line %d, invalid keyword: %s",
+					file, line_nr, str);
+		}
 		free_strvec(strvec);
 	}
 	if (kw_level == 1)
@@ -608,7 +614,7 @@ process_file(struct config *conf, const char *file)
 
 	/* Stream handling */
 	line_nr = 0;
-	r = process_stream(conf, stream, conf->keywords, file);
+	r = process_stream(conf, stream, conf->keywords, NULL, file);
 	fclose(stream);
 	//free_keywords(keywords);
 
-- 
2.17.2