From 1ff1aa424baa05a0fd06deeb6609a11b289ecd65 Mon Sep 17 00:00:00 2001
From: Kay Sievers <kay.sievers@vrfy.org>
Date: Mon, 16 Jul 2007 13:29:28 +0200
Subject: [PATCH] allow SYMLINK== match

---
 test/udev-test.pl  | 12 ------------
 udev_rules.c       | 32 ++++++++++++++++++++++++++------
 udev_rules.h       |  1 +
 udev_rules_parse.c |  6 +++++-
 4 files changed, 32 insertions(+), 19 deletions(-)

diff --git a/test/udev-test.pl b/test/udev-test.pl
index 53499d887..a2043080e 100755
--- a/test/udev-test.pl
+++ b/test/udev-test.pl
@@ -1516,18 +1516,6 @@ KERNEL=="sda2", NAME="wrong"
 KERNEL=="sda1", NAME=="wrong*", SYMLINK+="wronglink"
 KERNEL=="sda1", NAME=="?*", SYMLINK+="link"
 KERNEL=="sda1", NAME=="node*", SYMLINK+="link2"
-EOF
-	},
-	{
-		desc		=> "NAME compare test 2",
-		subsys		=> "block",
-		devpath		=> "/block/sda/sda1",
-		exp_name	=> "link2",
-		exp_target	=> "sda1",
-		not_exp_name	=> "link",
-		rules		=> <<EOF
-KERNEL=="sda1", NAME=="?*", SYMLINK+="link"
-KERNEL=="sda1", NAME!="?*", SYMLINK+="link2"
 EOF
 	},
 	{
diff --git a/udev_rules.c b/udev_rules.c
index 400ebad9e..daf3d7fff 100644
--- a/udev_rules.c
+++ b/udev_rules.c
@@ -940,10 +940,25 @@ static int match_rule(struct udevice *udev, struct udev_rule *rule)
 	if (match_key("DRIVER", rule, &rule->driver, udev->dev->driver))
 		goto nomatch;
 
-	/* match NAME against a value assigned by an earlier rule */
 	if (match_key("NAME", rule, &rule->name, udev->name))
 		goto nomatch;
 
+	/* match against current list of symlinks */
+	if (rule->symlink_match.operation == KEY_OP_MATCH ||
+	    rule->symlink_match.operation == KEY_OP_NOMATCH) {
+		struct name_entry *name_loop;
+		int match = 0;
+
+		list_for_each_entry(name_loop, &udev->symlink_list, node) {
+			if (match_key("SYMLINK", rule, &rule->symlink_match, name_loop->name) == 0) {
+				match = 1;
+				break;
+			}
+		}
+		if (!match)
+			goto nomatch;
+	}
+
 	for (i = 0; i < rule->env.count; i++) {
 		struct key_pair *pair = &rule->env.keys[i];
 
@@ -1250,6 +1265,9 @@ int udev_rules_get_name(struct udev_rules *rules, struct udevice *udev)
 	dbg("udev->dev->devpath='%s'", udev->dev->devpath);
 	dbg("udev->dev->kernel='%s'", udev->dev->kernel);
 
+	/* use kernel name as default node name */
+	strlcpy(udev->name, udev->dev->kernel, sizeof(udev->name));
+
 	/* look for a matching rule to apply */
 	udev_rules_iter_init(rules);
 	while (1) {
@@ -1311,14 +1329,18 @@ int udev_rules_get_name(struct udev_rules *rules, struct udevice *udev)
 			}
 
 			/* collect symlinks */
-			if (!udev->symlink_final && rule->symlink.operation != KEY_OP_UNSET) {
+			if (!udev->symlink_final &&
+			    (rule->symlink.operation == KEY_OP_ASSIGN ||
+			     rule->symlink.operation == KEY_OP_ASSIGN_FINAL ||
+			     rule->symlink.operation == KEY_OP_ADD)) {
 				char temp[PATH_SIZE];
 				char *pos, *next;
 				int count;
 
 				if (rule->symlink.operation == KEY_OP_ASSIGN_FINAL)
 					udev->symlink_final = 1;
-				if (rule->symlink.operation == KEY_OP_ASSIGN || rule->symlink.operation == KEY_OP_ASSIGN_FINAL) {
+				if (rule->symlink.operation == KEY_OP_ASSIGN ||
+				    rule->symlink.operation == KEY_OP_ASSIGN_FINAL) {
 					info("reset symlink list");
 					name_list_cleanup(&udev->symlink_list);
 				}
@@ -1400,10 +1422,8 @@ int udev_rules_get_name(struct udev_rules *rules, struct udevice *udev)
 		}
 	}
 
-	if (!name_set) {
-		strlcpy(udev->name, udev->dev->kernel, sizeof(udev->name));
+	if (!name_set)
 		info("no node name set, will use kernel name '%s'", udev->name);
-	}
 
 	if (udev->tmp_node[0] != '\0') {
 		dbg("removing temporary device node");
diff --git a/udev_rules.h b/udev_rules.h
index 556f55087..0ad4ec327 100644
--- a/udev_rules.h
+++ b/udev_rules.h
@@ -90,6 +90,7 @@ struct udev_rule {
 
 	struct key name;
 	struct key symlink;
+	struct key symlink_match;
 	struct key owner;
 	struct key group;
 	mode_t mode;
diff --git a/udev_rules_parse.c b/udev_rules_parse.c
index 124410a34..81c24b9cc 100644
--- a/udev_rules_parse.c
+++ b/udev_rules_parse.c
@@ -525,7 +525,11 @@ static int add_to_rules(struct udev_rules *rules, char *line, const char *filena
 		}
 
 		if (strcasecmp(key, "SYMLINK") == 0) {
-			add_rule_key(rule, &rule->symlink, operation, value);
+			if (operation == KEY_OP_MATCH ||
+			    operation == KEY_OP_NOMATCH)
+				add_rule_key(rule, &rule->symlink_match, operation, value);
+			else
+				add_rule_key(rule, &rule->symlink, operation, value);
 			valid = 1;
 			continue;
 		}
-- 
2.30.2