- error = 0;
- /*
- * new secondary superblocks need to be zeroed, not read from
- * disk as the contents of the new area we are growing into is
- * completely unknown.
- */
- if (agno < oagcount) {
- error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
- XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
- XFS_FSS_TO_BB(mp, 1), 0, &bp,
- &xfs_sb_buf_ops);
- } else {
- bp = xfs_trans_get_buf(NULL, mp->m_ddev_targp,
- XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
- XFS_FSS_TO_BB(mp, 1), 0);
- if (bp) {
- bp->b_ops = &xfs_sb_buf_ops;
- xfs_buf_zero(bp, 0, BBTOB(bp->b_length));
- } else
- error = -ENOMEM;
- }