mdadm: Add --write-zeros option for Create

[thirdparty/mdadm.git] / mdadm.c

diff --git a/mdadm.c b/mdadm.c
index 57e8e6fa64b9881f7e5b298a8a8ecb18455633cb..4685ad6b06c2becd8d7110247abe34af7bf08411 100644 (file)
--- a/mdadm.c
+++ b/mdadm.c
@@ -590,6 +590,10 @@ int main(int argc, char *argv[])
                        s.assume_clean = 1;
                        continue;
 
+               case O(CREATE, WriteZeroes):
+                       s.write_zeroes = 1;
+                       continue;
+
                case O(GROW,'n'):
                case O(CREATE,'n'):
                case O(BUILD,'n'): /* number of raid disks */
@@ -1251,6 +1255,11 @@ int main(int argc, char *argv[])
                }
        }
 
+       if (s.write_zeroes && !s.assume_clean) {
+               pr_info("Disk zeroing requested, setting --assume-clean to skip resync\n");
+               s.assume_clean = 1;
+       }
+
        if (!mode && devs_found) {
                mode = MISC;
                devmode = 'Q';