File bug-805764-ocfs2-controld.patch of Package ocfs2-tools.2690

Index: ocfs2-tools/ocfs2_controld/main.c
===================================================================
--- ocfs2-tools.orig/ocfs2_controld/main.c
+++ ocfs2-tools/ocfs2_controld/main.c
@@ -948,6 +948,68 @@ static void cpg_joined(int first)
 	}
 }
 
+static int find_minors(void)
+{
+	FILE *fl;
+	char name[256];
+	uint32_t number;
+	int c;
+	int control_minor = 0;
+
+	if (!(fl = fopen("/proc/misc", "r"))) {
+		log_error("failed to open /proc/misc: %s", strerror(errno));
+		goto out;
+	}
+
+	while (!feof(fl)) {
+		if (fscanf(fl, "%d %255s\n", &number, &name[0]) == 2) {
+			if (!strcmp(name, "ocfs2_control"))
+				control_minor = number;
+		} else do {
+			c = fgetc(fl);
+		} while (c != EOF && c != '\n');
+
+		if (control_minor)
+			break;
+	}
+	fclose(fl);
+
+	if (!control_minor)
+		log_error("Is ocfs2 missing from kernel? No misc devices found");
+out:
+	return control_minor;
+}
+
+static int find_udev_device(const char *path, uint32_t minor)
+{
+	struct stat st;
+	int i;
+
+	for (i = 0; i < 10; i++) {
+		if (stat(path, &st) == 0 && minor(st.st_rdev) == minor)
+			return 0;
+		sleep(1);
+	}
+
+	log_error("cannot find device %s with minor %d", path, minor);
+	return -1;
+}
+
+static int setup_misc_device(void)
+{
+	int rv = -1;
+	int control_minor = find_minors();
+
+	if (control_minor) {
+		rv = find_udev_device("/dev/misc/ocfs2_control", control_minor);
+		if (rv < 0)
+			return rv;
+		log_debug("found /dev/misc/ocfs2_control %u", control_minor);
+	}
+
+	return rv;
+}
+
 static int loop(void)
 {
 	int rv, i, poll_timeout = -1;
@@ -968,6 +1030,10 @@ static int loop(void)
 	if (rv < 0)
 		goto out;
 
+	rv = setup_misc_device();
+	if (rv < 0)
+		goto out;
+
 	rv = setup_cpg(cpg_joined);
 	if (rv < 0)
 		goto out;