xfs: recalculate summary counters at mount time if icount is bad

Since the sb write verifier trips on bad icounts, we should also force a
mount time recalculation of the summary counters if the icount is bad.
This helps us avoid blowing up at freeze/unmount time when the bad
counter gets written back out.
Signed-off-by: NDarrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: NAllison Henderson <allison.henderson@oracle.com>
Reviewed-by: NCarlos Maiolino <cmaiolino@redhat.com>

fs/xfs/xfs_mount.c

@@ -637,6 +637,7 @@ xfs_check_summary_counts(
 	 */
 	if (XFS_LAST_UNMOUNT_WAS_CLEAN(mp) &&
 	    (mp->m_sb.sb_fdblocks > mp->m_sb.sb_dblocks ||
+	     !xfs_verify_icount(mp, mp->m_sb.sb_icount) ||
 	     mp->m_sb.sb_ifree > mp->m_sb.sb_icount))
 		mp->m_flags |= XFS_MOUNT_BAD_SUMMARY;