Add data_offset arg to ->avail_size

This is currently only useful for 1.x metadata and will allow an
explicit --data-offset request on command line.

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

1 files changed, 4 insertions, 1 deletions

diff --git a/super0.c b/super0.c
index 8ca82e1b..a26e2e00 100644
--- a/super0.c
+++ b/super0.c
@@ -975,8 +975,11 @@ static struct supertype *match_metadata_desc0(char *arg)
 	return NULL;
 }
 
-static __u64 avail_size0(struct supertype *st, __u64 devsize)
+static __u64 avail_size0(struct supertype *st, __u64 devsize,
+			 unsigned long long data_offset)
 {
+	if (data_offset != 0 && data_offset != INVALID_SECTORS)
+		return 0ULL;
 	if (devsize < MD_RESERVED_SECTORS)
 		return 0ULL;
 	return MD_NEW_SIZE_SECTORS(devsize);