- if ((iblock + max_blocks) >
- ocfs2_clusters_to_blocks(inode->i_sb,
- OCFS2_I(inode)->ip_clusters)) {
+ inode_blocks = ocfs2_clusters_to_blocks(inode->i_sb,
+ OCFS2_I(inode)->ip_clusters);
+
+ /*
+ * For a read which begins past the end of file, we return a hole.
+ */
+ if (!create && (iblock >= inode_blocks)) {
+ spin_unlock(&OCFS2_I(inode)->ip_lock);
+ ret = 0;
+ goto bail;
+ }
+
+ /*
+ * Any write past EOF is not allowed because we'd be extending.
+ */
+ if (create && (iblock + max_blocks) > inode_blocks) {