main: factor out code to parse layout for raid10 and faulty.

This will soon be called from multiple places.

Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 34 insertions, 0 deletions

diff --git a/util.c b/util.c
index 080decc..c0c3f0c 100644
--- a/util.c
+++ b/util.c
@@ -185,6 +185,40 @@ long long parse_size(char *size)
 	return s;
 }
 
+int parse_layout_10(char *layout)
+{
+	int copies, rv;
+	char *cp;
+	/* Parse the layout string for raid10 */
+	/* 'f', 'o' or 'n' followed by a number <= raid_disks */
+	if ((layout[0] !=  'n' && layout[0] != 'f' && layout[0] != 'o') ||
+	    (copies = strtoul(layout+1, &cp, 10)) < 1 ||
+	    copies > 200 ||
+	    *cp)
+		return -1;
+	if (layout[0] == 'n')
+		rv = 256 + copies;
+	else if (layout[0] == 'o')
+		rv = 0x10000 + (copies<<8) + 1;
+	else
+		rv = 1 + (copies<<8);
+	return rv;
+}
+
+int parse_layout_faulty(char *layout)
+{
+	/* Parse the layout string for 'faulty' */
+	int ln = strcspn(layout, "0123456789");
+	char *m = strdup(layout);
+	int mode;
+	m[ln] = 0;
+	mode = map_name(faultylayout, m);
+	if (mode == UnSet)
+		return -1;
+
+	return mode | (atoi(layout+ln)<< ModeShift);
+}
+
 void remove_partitions(int fd)
 {
 	/* remove partitions from this block devices.