+ /*
+ * O_DIRECT writes with "coherency=full" need to take EX cluster
+ * inode_lock to guarantee coherency.
+ */
+ if (direct_io && full_coherency) {
+ /*
+ * We need to take and drop the inode lock to force
+ * other nodes to drop their caches. Buffered I/O
+ * already does this in write_begin().
+ */
+ ret = ocfs2_inode_lock(inode, NULL, 1);
+ if (ret < 0) {
+ mlog_errno(ret);
+ goto out_sems;
+ }
+
+ ocfs2_inode_unlock(inode, 1);
+ }
+