+ body = lustre_msg_buf ((*request)->rq_repmsg, 0, sizeof (*body));
+ LASSERT (body != NULL);
+ LASSERT_REPSWABBED (*request, 0);
+
+ if ((body->valid & OBD_MD_LINKNAME) == 0) {
+ CERROR ("OBD_MD_LINKNAME not set on reply\n");
+ GOTO (failed, rc = -EPROTO);
+ }
+
+ LASSERT (symlen != 0);
+ if (body->eadatasize != symlen) {
+ CERROR ("inode %lu: symlink length %d not expected %d\n",
+ inode->i_ino, body->eadatasize - 1, symlen - 1);
+ GOTO (failed, rc = -EPROTO);
+ }
+
+ *symname = lustre_msg_buf ((*request)->rq_repmsg, 1, symlen);
+ if (*symname == NULL ||
+ strnlen (*symname, symlen) != symlen - 1) {
+ /* not full/NULL terminated */
+ CERROR ("inode %lu: symlink not NULL terminated string"
+ "of length %d\n", inode->i_ino, symlen - 1);
+ GOTO (failed, rc = -EPROTO);
+ }
+
+ OBD_ALLOC(lli->lli_symlink_name, symlen);
+ /* do not return an error if we cannot cache the symlink locally */
+ if (lli->lli_symlink_name)
+ memcpy(lli->lli_symlink_name, *symname, symlen);
+
+ RETURN(0);
+
+ failed:
+ ptlrpc_req_finished (*request);
+ RETURN (-EPROTO);
+}
+
+static int ll_readlink(struct dentry *dentry, char *buffer, int buflen)
+{
+ struct inode *inode = dentry->d_inode;
+ struct ll_inode_info *lli = ll_i2info(inode);
+ struct ptlrpc_request *request;
+ char *symname;
+ int rc;
+ ENTRY;
+
+ CDEBUG(D_VFSTRACE, "VFS Op\n");
+ /* on symlinks lli_open_sem protects lli_symlink_name allocation/data */
+ down(&lli->lli_open_sem);
+ rc = ll_readlink_internal(inode, &request, &symname);
+ if (rc)
+ GOTO(out, rc);
+
+ rc = vfs_readlink(dentry, buffer, buflen, symname);
+ ptlrpc_req_finished(request);
+ out:
+ up(&lli->lli_open_sem);
+ RETURN(rc);
+}
+
+static int ll_follow_link(struct dentry *dentry, struct nameidata *nd)
+{
+ struct inode *inode = dentry->d_inode;
+ struct ll_inode_info *lli = ll_i2info(inode);
+ struct lookup_intent *it = ll_nd2it(nd);
+ struct ptlrpc_request *request;
+ int rc;
+ char *symname;
+ ENTRY;
+
+ if (it != NULL) {
+ int op = it->it_op;
+ int mode = it->it_create_mode;
+
+ ll_intent_release(it);
+ it->it_op = op;
+ it->it_create_mode = mode;
+ }
+
+ CDEBUG(D_VFSTRACE, "VFS Op\n");
+ down(&lli->lli_open_sem);
+ rc = ll_readlink_internal(inode, &request, &symname);
+ up(&lli->lli_open_sem);
+ if (rc)
+ GOTO(out, rc);