[PATCH v6 08/12] of: overlay: replace filename with an more unique name

[Marco Felsch <m.felsch@pengutronix.de>]

Since FIT image overlays and file/dir based overlays are supported,
'filename' based variables or function hooks are no longer sufficient.

Rename them to 'pattern' based variables or function hooks. The
filter_filename function hook is still supported, to keep the backward
compatibility, but marked as deprecated.

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
---
 drivers/of/overlay.c | 39 +++++++++++++++++++++------------------
 include/of.h         |  3 ++-
 2 files changed, 23 insertions(+), 19 deletions(-)

diff --git a/drivers/of/overlay.c b/drivers/of/overlay.c
index b15a0f1fab8f729a1ba48da8d5bd5041cd519acc..6b19c7c88ea5e99040bddca172c47251e8ddda84 100644
--- a/drivers/of/overlay.c
+++ b/drivers/of/overlay.c
@@ -234,12 +234,12 @@ static struct of_overlay_filter *of_overlay_find_filter(const char *name)
 	return NULL;
 }
 
-static bool of_overlay_matches_filter(const char *filename, struct device_node *ovl)
+static bool of_overlay_matches_filter(const char *pattern, struct device_node *ovl)
 {
 	struct of_overlay_filter *filter;
 	char *p, *path, *n;
 	bool apply = false;
-	bool have_filename_filter = false;
+	bool have_pattern_filter = false;
 	bool have_content_filter = false;
 
 	p = path = strdup(of_overlay_filter);
@@ -256,14 +256,16 @@ static bool of_overlay_matches_filter(const char *filename, struct device_node *
 			continue;
 		}
 
-		if (filter->filter_filename)
-			have_filename_filter = true;
+		if (filter->filter_pattern || filter->filter_filename)
+			have_pattern_filter = true;
 		if (filter->filter_content)
 			have_content_filter = true;
 
-		if (filename) {
-			if (filter->filter_filename &&
-			    filter->filter_filename(filter, kbasename(filename)))
+		if (pattern) {
+			if ((filter->filter_pattern &&
+			     filter->filter_pattern(filter, kbasename(pattern))) ||
+			    (filter->filter_filename &&
+			     filter->filter_filename(filter, kbasename(pattern))))
 				score++;
 		} else {
 			score++;
@@ -286,11 +288,11 @@ static bool of_overlay_matches_filter(const char *filename, struct device_node *
 	free(path);
 
 	/* No filter found at all, no match */
-	if (!have_filename_filter && !have_content_filter)
+	if (!have_pattern_filter && !have_content_filter)
 		return false;
 
-	/* Want to match filename, but we do not have a filename_filter */
-	if (filename && !have_filename_filter)
+	/* Want to match pattern, but we do not have a filename_filter */
+	if (pattern && !have_pattern_filter)
 		return true;
 
 	/* Want to match content, but we do not have a content_filter */
@@ -298,12 +300,12 @@ static bool of_overlay_matches_filter(const char *filename, struct device_node *
 		return true;
 
 	if (apply)
-		pr_debug("filename %s, overlay %p: match against filter %s\n",
-			 filename ?: "<NONE>",
+		pr_debug("pattern %s, overlay %p: match against filter %s\n",
+			 pattern ?: "<NONE>",
 			 ovl, filter->name);
 	else
-		pr_debug("filename %s, overlay %p: no match\n",
-			 filename ?: "<NONE>", ovl);
+		pr_debug("pattern %s, overlay %p: no match\n",
+			 pattern ?: "<NONE>", ovl);
 
 	return apply;
 }
@@ -599,14 +601,15 @@ static int of_overlay_global_fixup(struct device_node *root, void *data)
  * @filter: The new filter
  *
  * Register a new overlay filter. A filter can either match on
- * the filename or on the content of an overlay, but not on both.
+ * a pattern or on the content of an overlay, but not on both.
  * If that's desired two filters have to be registered.
  *
  * @return: 0 for success, negative error code otherwise
  */
 int of_overlay_register_filter(struct of_overlay_filter *filter)
 {
-	if (filter->filter_filename && filter->filter_content)
+	if ((filter->filter_pattern || filter->filter_filename) &&
+	    filter->filter_content)
 		return -EINVAL;
 
 	list_add_tail(&filter->list, &of_overlay_filters);
@@ -656,7 +659,7 @@ static bool of_overlay_filter_pattern(struct of_overlay_filter *f,
 
 static struct of_overlay_filter of_overlay_pattern_filter = {
 	.name = "pattern",
-	.filter_filename = of_overlay_filter_pattern,
+	.filter_pattern = of_overlay_filter_pattern,
 };
 
 static bool of_overlay_filter_filename(struct of_overlay_filter *f,
@@ -668,7 +671,7 @@ static bool of_overlay_filter_filename(struct of_overlay_filter *f,
 
 static struct of_overlay_filter of_overlay_filepattern_filter = {
 	.name = "filepattern",
-	.filter_filename = of_overlay_filter_filename,
+	.filter_pattern = of_overlay_filter_filename,
 };
 
 /**
diff --git a/include/of.h b/include/of.h
index 2258cd501b727797ac00fc4cce1a6fdcfc529d44..1c7c0c867700fcf1aa2316ed1e1702b93aa13011 100644
--- a/include/of.h
+++ b/include/of.h
@@ -1384,7 +1384,8 @@ static inline struct device_node *of_dup_root_node_for_boot(void)
 }
 
 struct of_overlay_filter {
-	bool (*filter_filename)(struct of_overlay_filter *, const char *filename);
+	bool (*filter_filename)(struct of_overlay_filter *, const char *filename); /* deprecated */
+	bool (*filter_pattern)(struct of_overlay_filter *, const char *pattern);
 	bool (*filter_content)(struct of_overlay_filter *, struct device_node *);
 	const char *name;
 	struct list_head list;

-- 
2.39.5