linux-kernel - [RFC PATCH v3 03/18] dyndbg: refactor part of ddebug_change to ddebug_match

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Message-Id: <20210316050801.2446401-4-jim.cromie@gmail.com>
Date:   Mon, 15 Mar 2021 23:07:46 -0600
From:   Jim Cromie <jim.cromie@...il.com>
To:     jbaron@...mai.com, gregkh@...uxfoundation.org,
        linux-kernel@...r.kernel.org
Cc:     Jim Cromie <jim.cromie@...il.com>
Subject: [RFC PATCH v3 03/18] dyndbg: refactor part of ddebug_change to ddebug_match_site

Move all the site-match logic into a separate function, reindent the
code, and replace the continues with return falses.

No functional changes.

Signed-off-by: Jim Cromie <jim.cromie@...il.com>
---
 lib/dynamic_debug.c | 75 ++++++++++++++++++++++++++-------------------
 1 file changed, 43 insertions(+), 32 deletions(-)

diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index c3c35dcc6a59..9cff9db15937 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -142,6 +142,48 @@ static void vpr_info_dq(const struct ddebug_query *query, const char *msg)
 		 query->first_lineno, query->last_lineno);
 }
 
+static int ddebug_match_site(const struct ddebug_query *query,
+			     const struct _ddebug *dp)
+{
+	struct _ddebug_site *dc = dp->site;
+
+	/* match against the source filename */
+	if (query->filename &&
+	    !match_wildcard(query->filename, dc->filename) &&
+	    !match_wildcard(query->filename,
+			    kbasename(dc->filename)) &&
+	    !match_wildcard(query->filename,
+			    trim_prefix(dc->filename)))
+		return false;
+
+	/* match against the function */
+	if (query->function &&
+	    !match_wildcard(query->function, dc->function))
+		return false;
+
+	/* match against the format */
+	if (query->format) {
+		if (*query->format == '^') {
+			char *p;
+			/* anchored search. match must be at beginning */
+			p = strstr(dp->format, query->format+1);
+			if (p != dp->format)
+				return false;
+		} else if (!strstr(dp->format, query->format))
+			return false;
+	}
+
+	/* match against the line number range */
+	if (query->first_lineno &&
+	    dp->lineno < query->first_lineno)
+		return false;
+	if (query->last_lineno &&
+	    dp->lineno > query->last_lineno)
+		return false;
+
+	return true;
+}
+
 /*
  * Search the tables for _ddebug's which match the given `query' and
  * apply the `flags' and `mask' to them.  Returns number of matching
@@ -170,38 +212,7 @@ static int ddebug_change(const struct ddebug_query *query,
 			struct _ddebug *dp = &dt->ddebugs[i];
 			struct _ddebug_site *dc = dp->site;
 
-			/* match against the source filename */
-			if (query->filename &&
-			    !match_wildcard(query->filename, dc->filename) &&
-			    !match_wildcard(query->filename,
-					   kbasename(dc->filename)) &&
-			    !match_wildcard(query->filename,
-					   trim_prefix(dc->filename)))
-				continue;
-
-			/* match against the function */
-			if (query->function &&
-			    !match_wildcard(query->function, dc->function))
-				continue;
-
-			/* match against the format */
-			if (query->format) {
-				if (*query->format == '^') {
-					char *p;
-					/* anchored search. match must be at beginning */
-					p = strstr(dp->format, query->format+1);
-					if (p != dp->format)
-						continue;
-				} else if (!strstr(dp->format, query->format))
-					continue;
-			}
-
-			/* match against the line number range */
-			if (query->first_lineno &&
-			    dp->lineno < query->first_lineno)
-				continue;
-			if (query->last_lineno &&
-			    dp->lineno > query->last_lineno)
+			if (!ddebug_match_site(query, dp))
 				continue;
 
 			nfound++;
-- 
2.29.2