Allow a metadata update to have a linked list of allocated spaces.

Sometimes one metadata update will require allocating several
larger data structures.  As 'monitor' cannot allocate, 'manager'
must, so it must be able to attach a list of allocates to the
update, and importantly it must be able to easily free them.

So add a 'space_list' element to metadata updates where each
element on the list starts with a pointer to the next.

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

1 files changed, 1 insertions, 0 deletions

diff --git a/util.c b/util.c
index f57cd9ee..7544ce17 100644
--- a/util.c
+++ b/util.c
@@ -1890,6 +1890,7 @@ void append_metadata_update(struct supertype *st, void *buf, int len)
 	mu->buf = buf;
 	mu->len = len;
 	mu->space = NULL;
+	mu->space_list = NULL;
 	mu->next = NULL;
 	*st->update_tail = mu;
 	st->update_tail = &mu->next;