imsm: implement store_zero_imsm and init_zero_imsm

[thirdparty/mdadm.git] / super-intel.c

diff --git a/super-intel.c b/super-intel.c
index 77892dd25cb088351c3ef317f8f247364181559e..c8419f001d34041167fbd504f312e4506c90542e 100644 (file)
--- a/super-intel.c
+++ b/super-intel.c
@@ -1031,8 +1031,7 @@ static int init_zero_imsm(struct supertype *st, mdu_array_info_t *info,
                          unsigned long long size, char *name,
                          char *homehost, int *uuid)
 {
-       printf("%s\n", __FUNCTION__);
-
+       st->sb = NULL;
        return 0;
 }
 
@@ -1269,7 +1268,18 @@ static int write_init_super_imsm(struct supertype *st)
 
 static int store_zero_imsm(struct supertype *st, int fd)
 {
-       printf("%s\n", __FUNCTION__);
+       unsigned long long dsize;
+       char buf[512];
+
+       get_dev_size(fd, NULL, &dsize);
+
+       /* first block is stored on second to last sector of the disk */
+       if (lseek64(fd, dsize - (512 * 2), SEEK_SET) < 0)
+               return 1;
+
+       memset(buf, 0, sizeof(buf));
+       if (write(fd, buf, sizeof(buf)) != sizeof(buf))
+               return 1;
 
        return 0;
 }