+ struct dentry *dchild;
+ struct iattr newattrs;
+ int err = 0;
+ ENTRY;
+
+ CDEBUG(D_INODE, "truncating file %.*s to %lld\n", (int)strlen(name),
+ name, (long long)length);
+ dchild = ll_lookup_one_len(name, dir, strlen(name));
+ if (IS_ERR(dchild))
+ GOTO(out, err = PTR_ERR(dchild));
+
+ if (dchild->d_inode) {
+ int old_mode = dchild->d_inode->i_mode;
+ if (S_ISDIR(old_mode)) {
+ CERROR("found %s (%lu/%u) is mode %o\n", name,
+ dchild->d_inode->i_ino,
+ dchild->d_inode->i_generation, old_mode);
+ GOTO(out_dput, err = -EISDIR);
+ }
+
+ newattrs.ia_size = length;
+ newattrs.ia_valid = ATTR_SIZE;
+ err = l_notify_change(mnt, dchild, &newattrs);
+ }
+ EXIT;
+out_dput:
+ dput(dchild);
+out:
+ return err;
+}
+EXPORT_SYMBOL(simple_truncate);
+
+#ifdef LUSTRE_KERNEL_VERSION
+int __lvfs_set_rdonly(lvfs_sbdev_type dev, lvfs_sbdev_type jdev)
+{
+#ifdef HAVE_DEV_SET_RDONLY