init_layout(): fix rounding

block_size is in bytes, not sectors, so when calling round_up(),
we could start rounding up by a way too large size and then overflow
outside the area that migrate allocated for us.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

diff --git a/libbcachefs.c b/libbcachefs.c
index ceb6027016c32d21595b265f9e34555fac6aedd6..ef4cc7181f877e30f1b976f45051160eeda875ac 100644 (file)
--- a/libbcachefs.c
+++ b/libbcachefs.c
@@ -48,7 +48,7 @@ static void init_layout(struct bch_sb_layout *l,
        /* Create two superblocks in the allowed range: */
        for (i = 0; i < l->nr_superblocks; i++) {
                if (sb_pos != BCH_SB_SECTOR)
-                       sb_pos = round_up(sb_pos, block_size);
+                       sb_pos = round_up(sb_pos, block_size >> 9);
 
                l->sb_offset[i] = cpu_to_le64(sb_pos);
                sb_pos += sb_size;