799 lines
21 KiB
C
799 lines
21 KiB
C
/*
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* GPL HEADER START
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 only,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License version 2 for more details (a copy is included
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* in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU General Public License
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* version 2 along with this program; If not, see
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* http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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* GPL HEADER END
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*/
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/*
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* Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
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* Use is subject to license terms.
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*
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* Copyright (c) 2010, 2015, Intel Corporation.
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*/
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/*
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* This file is part of Lustre, http://www.lustre.org/
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* Lustre is a trademark of Sun Microsystems, Inc.
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*/
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/**
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* This file deals with various client/target related logic including recovery.
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*
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* TODO: This code more logically belongs in the ptlrpc module than in ldlm and
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* should be moved.
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*/
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#define DEBUG_SUBSYSTEM S_LDLM
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#include "../../include/linux/libcfs/libcfs.h"
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#include "../include/obd.h"
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#include "../include/obd_class.h"
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#include "../include/lustre_dlm.h"
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#include "../include/lustre_net.h"
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#include "../include/lustre_sec.h"
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#include "ldlm_internal.h"
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/* @priority: If non-zero, move the selected connection to the list head.
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* @create: If zero, only search in existing connections.
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*/
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static int import_set_conn(struct obd_import *imp, struct obd_uuid *uuid,
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int priority, int create)
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{
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struct ptlrpc_connection *ptlrpc_conn;
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struct obd_import_conn *imp_conn = NULL, *item;
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int rc = 0;
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if (!create && !priority) {
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CDEBUG(D_HA, "Nothing to do\n");
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return -EINVAL;
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}
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ptlrpc_conn = ptlrpc_uuid_to_connection(uuid);
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if (!ptlrpc_conn) {
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CDEBUG(D_HA, "can't find connection %s\n", uuid->uuid);
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return -ENOENT;
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}
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if (create) {
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imp_conn = kzalloc(sizeof(*imp_conn), GFP_NOFS);
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if (!imp_conn) {
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rc = -ENOMEM;
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goto out_put;
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}
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}
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spin_lock(&imp->imp_lock);
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list_for_each_entry(item, &imp->imp_conn_list, oic_item) {
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if (obd_uuid_equals(uuid, &item->oic_uuid)) {
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if (priority) {
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list_del(&item->oic_item);
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list_add(&item->oic_item,
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&imp->imp_conn_list);
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item->oic_last_attempt = 0;
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}
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CDEBUG(D_HA, "imp %p@%s: found existing conn %s%s\n",
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imp, imp->imp_obd->obd_name, uuid->uuid,
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(priority ? ", moved to head" : ""));
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spin_unlock(&imp->imp_lock);
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rc = 0;
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goto out_free;
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}
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}
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/* No existing import connection found for \a uuid. */
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if (create) {
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imp_conn->oic_conn = ptlrpc_conn;
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imp_conn->oic_uuid = *uuid;
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imp_conn->oic_last_attempt = 0;
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if (priority)
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list_add(&imp_conn->oic_item, &imp->imp_conn_list);
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else
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list_add_tail(&imp_conn->oic_item,
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&imp->imp_conn_list);
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CDEBUG(D_HA, "imp %p@%s: add connection %s at %s\n",
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imp, imp->imp_obd->obd_name, uuid->uuid,
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(priority ? "head" : "tail"));
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} else {
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spin_unlock(&imp->imp_lock);
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rc = -ENOENT;
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goto out_free;
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}
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spin_unlock(&imp->imp_lock);
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return 0;
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out_free:
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kfree(imp_conn);
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out_put:
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ptlrpc_connection_put(ptlrpc_conn);
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return rc;
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}
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int import_set_conn_priority(struct obd_import *imp, struct obd_uuid *uuid)
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{
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return import_set_conn(imp, uuid, 1, 0);
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}
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int client_import_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
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int priority)
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{
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return import_set_conn(imp, uuid, priority, 1);
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}
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EXPORT_SYMBOL(client_import_add_conn);
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int client_import_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
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{
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struct obd_import_conn *imp_conn;
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struct obd_export *dlmexp;
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int rc = -ENOENT;
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spin_lock(&imp->imp_lock);
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if (list_empty(&imp->imp_conn_list)) {
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LASSERT(!imp->imp_connection);
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goto out;
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}
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list_for_each_entry(imp_conn, &imp->imp_conn_list, oic_item) {
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if (!obd_uuid_equals(uuid, &imp_conn->oic_uuid))
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continue;
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LASSERT(imp_conn->oic_conn);
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if (imp_conn == imp->imp_conn_current) {
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LASSERT(imp_conn->oic_conn == imp->imp_connection);
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if (imp->imp_state != LUSTRE_IMP_CLOSED &&
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imp->imp_state != LUSTRE_IMP_DISCON) {
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CERROR("can't remove current connection\n");
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rc = -EBUSY;
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goto out;
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}
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ptlrpc_connection_put(imp->imp_connection);
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imp->imp_connection = NULL;
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dlmexp = class_conn2export(&imp->imp_dlm_handle);
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if (dlmexp && dlmexp->exp_connection) {
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LASSERT(dlmexp->exp_connection ==
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imp_conn->oic_conn);
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ptlrpc_connection_put(dlmexp->exp_connection);
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dlmexp->exp_connection = NULL;
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}
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}
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list_del(&imp_conn->oic_item);
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ptlrpc_connection_put(imp_conn->oic_conn);
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kfree(imp_conn);
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CDEBUG(D_HA, "imp %p@%s: remove connection %s\n",
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imp, imp->imp_obd->obd_name, uuid->uuid);
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rc = 0;
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break;
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}
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out:
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spin_unlock(&imp->imp_lock);
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if (rc == -ENOENT)
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CERROR("connection %s not found\n", uuid->uuid);
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return rc;
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}
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EXPORT_SYMBOL(client_import_del_conn);
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/**
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* Find conn UUID by peer NID. \a peer is a server NID. This function is used
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* to find a conn uuid of \a imp which can reach \a peer.
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*/
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int client_import_find_conn(struct obd_import *imp, lnet_nid_t peer,
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struct obd_uuid *uuid)
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{
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struct obd_import_conn *conn;
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int rc = -ENOENT;
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spin_lock(&imp->imp_lock);
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list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
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/* Check if conn UUID does have this peer NID. */
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if (class_check_uuid(&conn->oic_uuid, peer)) {
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*uuid = conn->oic_uuid;
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rc = 0;
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break;
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}
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}
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spin_unlock(&imp->imp_lock);
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return rc;
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}
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EXPORT_SYMBOL(client_import_find_conn);
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void client_destroy_import(struct obd_import *imp)
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{
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/* Drop security policy instance after all RPCs have finished/aborted
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* to let all busy contexts be released.
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*/
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class_import_get(imp);
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class_destroy_import(imp);
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sptlrpc_import_sec_put(imp);
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class_import_put(imp);
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}
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EXPORT_SYMBOL(client_destroy_import);
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/* Configure an RPC client OBD device.
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*
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* lcfg parameters:
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* 1 - client UUID
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* 2 - server UUID
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* 3 - inactive-on-startup
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*/
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int client_obd_setup(struct obd_device *obddev, struct lustre_cfg *lcfg)
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{
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struct client_obd *cli = &obddev->u.cli;
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struct obd_import *imp;
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struct obd_uuid server_uuid;
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int rq_portal, rp_portal, connect_op;
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char *name = obddev->obd_type->typ_name;
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enum ldlm_ns_type ns_type = LDLM_NS_TYPE_UNKNOWN;
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int rc;
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/* In a more perfect world, we would hang a ptlrpc_client off of
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* obd_type and just use the values from there.
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*/
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if (!strcmp(name, LUSTRE_OSC_NAME)) {
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rq_portal = OST_REQUEST_PORTAL;
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rp_portal = OSC_REPLY_PORTAL;
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connect_op = OST_CONNECT;
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cli->cl_sp_me = LUSTRE_SP_CLI;
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cli->cl_sp_to = LUSTRE_SP_OST;
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ns_type = LDLM_NS_TYPE_OSC;
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} else if (!strcmp(name, LUSTRE_MDC_NAME) ||
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!strcmp(name, LUSTRE_LWP_NAME)) {
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rq_portal = MDS_REQUEST_PORTAL;
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rp_portal = MDC_REPLY_PORTAL;
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connect_op = MDS_CONNECT;
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cli->cl_sp_me = LUSTRE_SP_CLI;
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cli->cl_sp_to = LUSTRE_SP_MDT;
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ns_type = LDLM_NS_TYPE_MDC;
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} else if (!strcmp(name, LUSTRE_MGC_NAME)) {
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rq_portal = MGS_REQUEST_PORTAL;
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rp_portal = MGC_REPLY_PORTAL;
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connect_op = MGS_CONNECT;
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cli->cl_sp_me = LUSTRE_SP_MGC;
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cli->cl_sp_to = LUSTRE_SP_MGS;
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cli->cl_flvr_mgc.sf_rpc = SPTLRPC_FLVR_INVALID;
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ns_type = LDLM_NS_TYPE_MGC;
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} else {
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CERROR("unknown client OBD type \"%s\", can't setup\n",
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name);
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return -EINVAL;
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}
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if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
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CERROR("requires a TARGET UUID\n");
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return -EINVAL;
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}
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if (LUSTRE_CFG_BUFLEN(lcfg, 1) > 37) {
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CERROR("client UUID must be less than 38 characters\n");
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return -EINVAL;
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}
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if (LUSTRE_CFG_BUFLEN(lcfg, 2) < 1) {
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CERROR("setup requires a SERVER UUID\n");
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return -EINVAL;
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}
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if (LUSTRE_CFG_BUFLEN(lcfg, 2) > 37) {
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CERROR("target UUID must be less than 38 characters\n");
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return -EINVAL;
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}
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init_rwsem(&cli->cl_sem);
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cli->cl_conn_count = 0;
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memcpy(server_uuid.uuid, lustre_cfg_buf(lcfg, 2),
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min_t(unsigned int, LUSTRE_CFG_BUFLEN(lcfg, 2),
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sizeof(server_uuid)));
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cli->cl_dirty = 0;
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cli->cl_avail_grant = 0;
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/* FIXME: Should limit this for the sum of all cl_dirty_max. */
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cli->cl_dirty_max = OSC_MAX_DIRTY_DEFAULT * 1024 * 1024;
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if (cli->cl_dirty_max >> PAGE_SHIFT > totalram_pages / 8)
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cli->cl_dirty_max = totalram_pages << (PAGE_SHIFT - 3);
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INIT_LIST_HEAD(&cli->cl_cache_waiters);
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INIT_LIST_HEAD(&cli->cl_loi_ready_list);
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INIT_LIST_HEAD(&cli->cl_loi_hp_ready_list);
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INIT_LIST_HEAD(&cli->cl_loi_write_list);
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INIT_LIST_HEAD(&cli->cl_loi_read_list);
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client_obd_list_lock_init(&cli->cl_loi_list_lock);
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atomic_set(&cli->cl_pending_w_pages, 0);
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atomic_set(&cli->cl_pending_r_pages, 0);
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cli->cl_r_in_flight = 0;
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cli->cl_w_in_flight = 0;
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spin_lock_init(&cli->cl_read_rpc_hist.oh_lock);
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spin_lock_init(&cli->cl_write_rpc_hist.oh_lock);
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spin_lock_init(&cli->cl_read_page_hist.oh_lock);
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spin_lock_init(&cli->cl_write_page_hist.oh_lock);
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spin_lock_init(&cli->cl_read_offset_hist.oh_lock);
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spin_lock_init(&cli->cl_write_offset_hist.oh_lock);
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/* lru for osc. */
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INIT_LIST_HEAD(&cli->cl_lru_osc);
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atomic_set(&cli->cl_lru_shrinkers, 0);
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atomic_set(&cli->cl_lru_busy, 0);
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atomic_set(&cli->cl_lru_in_list, 0);
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INIT_LIST_HEAD(&cli->cl_lru_list);
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client_obd_list_lock_init(&cli->cl_lru_list_lock);
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init_waitqueue_head(&cli->cl_destroy_waitq);
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atomic_set(&cli->cl_destroy_in_flight, 0);
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/* Turn on checksumming by default. */
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cli->cl_checksum = 1;
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/*
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* The supported checksum types will be worked out at connect time
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* Set cl_chksum* to CRC32 for now to avoid returning screwed info
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* through procfs.
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*/
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cli->cl_cksum_type = cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
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atomic_set(&cli->cl_resends, OSC_DEFAULT_RESENDS);
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/* This value may be reduced at connect time in
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* ptlrpc_connect_interpret() . We initialize it to only
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* 1MB until we know what the performance looks like.
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* In the future this should likely be increased. LU-1431
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*/
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cli->cl_max_pages_per_rpc = min_t(int, PTLRPC_MAX_BRW_PAGES,
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LNET_MTU >> PAGE_SHIFT);
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if (!strcmp(name, LUSTRE_MDC_NAME)) {
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cli->cl_max_rpcs_in_flight = MDC_MAX_RIF_DEFAULT;
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} else if (totalram_pages >> (20 - PAGE_SHIFT) <= 128 /* MB */) {
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cli->cl_max_rpcs_in_flight = 2;
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} else if (totalram_pages >> (20 - PAGE_SHIFT) <= 256 /* MB */) {
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cli->cl_max_rpcs_in_flight = 3;
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} else if (totalram_pages >> (20 - PAGE_SHIFT) <= 512 /* MB */) {
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cli->cl_max_rpcs_in_flight = 4;
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} else {
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cli->cl_max_rpcs_in_flight = OSC_MAX_RIF_DEFAULT;
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}
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rc = ldlm_get_ref();
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if (rc) {
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CERROR("ldlm_get_ref failed: %d\n", rc);
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goto err;
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}
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|
|
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ptlrpc_init_client(rq_portal, rp_portal, name,
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&obddev->obd_ldlm_client);
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imp = class_new_import(obddev);
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if (!imp) {
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rc = -ENOENT;
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goto err_ldlm;
|
|
}
|
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imp->imp_client = &obddev->obd_ldlm_client;
|
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imp->imp_connect_op = connect_op;
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memcpy(cli->cl_target_uuid.uuid, lustre_cfg_buf(lcfg, 1),
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LUSTRE_CFG_BUFLEN(lcfg, 1));
|
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class_import_put(imp);
|
|
|
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rc = client_import_add_conn(imp, &server_uuid, 1);
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if (rc) {
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CERROR("can't add initial connection\n");
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goto err_import;
|
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}
|
|
|
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cli->cl_import = imp;
|
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/* cli->cl_max_mds_{easize,cookiesize} updated by mdc_init_ea_size() */
|
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cli->cl_max_mds_easize = sizeof(struct lov_mds_md_v3);
|
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cli->cl_max_mds_cookiesize = sizeof(struct llog_cookie);
|
|
|
|
if (LUSTRE_CFG_BUFLEN(lcfg, 3) > 0) {
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|
if (!strcmp(lustre_cfg_string(lcfg, 3), "inactive")) {
|
|
CDEBUG(D_HA, "marking %s %s->%s as inactive\n",
|
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name, obddev->obd_name,
|
|
cli->cl_target_uuid.uuid);
|
|
spin_lock(&imp->imp_lock);
|
|
imp->imp_deactive = 1;
|
|
spin_unlock(&imp->imp_lock);
|
|
}
|
|
}
|
|
|
|
obddev->obd_namespace = ldlm_namespace_new(obddev, obddev->obd_name,
|
|
LDLM_NAMESPACE_CLIENT,
|
|
LDLM_NAMESPACE_GREEDY,
|
|
ns_type);
|
|
if (!obddev->obd_namespace) {
|
|
CERROR("Unable to create client namespace - %s\n",
|
|
obddev->obd_name);
|
|
rc = -ENOMEM;
|
|
goto err_import;
|
|
}
|
|
|
|
cli->cl_qchk_stat = CL_NOT_QUOTACHECKED;
|
|
|
|
return rc;
|
|
|
|
err_import:
|
|
class_destroy_import(imp);
|
|
err_ldlm:
|
|
ldlm_put_ref();
|
|
err:
|
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return rc;
|
|
|
|
}
|
|
EXPORT_SYMBOL(client_obd_setup);
|
|
|
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int client_obd_cleanup(struct obd_device *obddev)
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{
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|
ldlm_namespace_free_post(obddev->obd_namespace);
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obddev->obd_namespace = NULL;
|
|
|
|
LASSERT(!obddev->u.cli.cl_import);
|
|
|
|
ldlm_put_ref();
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(client_obd_cleanup);
|
|
|
|
/* ->o_connect() method for client side (OSC and MDC and MGC) */
|
|
int client_connect_import(const struct lu_env *env,
|
|
struct obd_export **exp,
|
|
struct obd_device *obd, struct obd_uuid *cluuid,
|
|
struct obd_connect_data *data, void *localdata)
|
|
{
|
|
struct client_obd *cli = &obd->u.cli;
|
|
struct obd_import *imp = cli->cl_import;
|
|
struct obd_connect_data *ocd;
|
|
struct lustre_handle conn = { 0 };
|
|
int rc;
|
|
|
|
*exp = NULL;
|
|
down_write(&cli->cl_sem);
|
|
if (cli->cl_conn_count > 0) {
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|
rc = -EALREADY;
|
|
goto out_sem;
|
|
}
|
|
|
|
rc = class_connect(&conn, obd, cluuid);
|
|
if (rc)
|
|
goto out_sem;
|
|
|
|
cli->cl_conn_count++;
|
|
*exp = class_conn2export(&conn);
|
|
|
|
LASSERT(obd->obd_namespace);
|
|
|
|
imp->imp_dlm_handle = conn;
|
|
rc = ptlrpc_init_import(imp);
|
|
if (rc != 0)
|
|
goto out_ldlm;
|
|
|
|
ocd = &imp->imp_connect_data;
|
|
if (data) {
|
|
*ocd = *data;
|
|
imp->imp_connect_flags_orig = data->ocd_connect_flags;
|
|
}
|
|
|
|
rc = ptlrpc_connect_import(imp);
|
|
if (rc != 0) {
|
|
LASSERT(imp->imp_state == LUSTRE_IMP_DISCON);
|
|
goto out_ldlm;
|
|
}
|
|
LASSERT(*exp && (*exp)->exp_connection);
|
|
|
|
if (data) {
|
|
LASSERTF((ocd->ocd_connect_flags & data->ocd_connect_flags) ==
|
|
ocd->ocd_connect_flags, "old %#llx, new %#llx\n",
|
|
data->ocd_connect_flags, ocd->ocd_connect_flags);
|
|
data->ocd_connect_flags = ocd->ocd_connect_flags;
|
|
}
|
|
|
|
ptlrpc_pinger_add_import(imp);
|
|
|
|
if (rc) {
|
|
out_ldlm:
|
|
cli->cl_conn_count--;
|
|
class_disconnect(*exp);
|
|
*exp = NULL;
|
|
}
|
|
out_sem:
|
|
up_write(&cli->cl_sem);
|
|
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL(client_connect_import);
|
|
|
|
int client_disconnect_export(struct obd_export *exp)
|
|
{
|
|
struct obd_device *obd = class_exp2obd(exp);
|
|
struct client_obd *cli;
|
|
struct obd_import *imp;
|
|
int rc = 0, err;
|
|
|
|
if (!obd) {
|
|
CERROR("invalid export for disconnect: exp %p cookie %#llx\n",
|
|
exp, exp ? exp->exp_handle.h_cookie : -1);
|
|
return -EINVAL;
|
|
}
|
|
|
|
cli = &obd->u.cli;
|
|
imp = cli->cl_import;
|
|
|
|
down_write(&cli->cl_sem);
|
|
CDEBUG(D_INFO, "disconnect %s - %d\n", obd->obd_name,
|
|
cli->cl_conn_count);
|
|
|
|
if (!cli->cl_conn_count) {
|
|
CERROR("disconnecting disconnected device (%s)\n",
|
|
obd->obd_name);
|
|
rc = -EINVAL;
|
|
goto out_disconnect;
|
|
}
|
|
|
|
cli->cl_conn_count--;
|
|
if (cli->cl_conn_count) {
|
|
rc = 0;
|
|
goto out_disconnect;
|
|
}
|
|
|
|
/* Mark import deactivated now, so we don't try to reconnect if any
|
|
* of the cleanup RPCs fails (e.g. LDLM cancel, etc). We don't
|
|
* fully deactivate the import, or that would drop all requests.
|
|
*/
|
|
spin_lock(&imp->imp_lock);
|
|
imp->imp_deactive = 1;
|
|
spin_unlock(&imp->imp_lock);
|
|
|
|
/* Some non-replayable imports (MDS's OSCs) are pinged, so just
|
|
* delete it regardless. (It's safe to delete an import that was
|
|
* never added.)
|
|
*/
|
|
(void)ptlrpc_pinger_del_import(imp);
|
|
|
|
if (obd->obd_namespace) {
|
|
/* obd_force == local only */
|
|
ldlm_cli_cancel_unused(obd->obd_namespace, NULL,
|
|
obd->obd_force ? LCF_LOCAL : 0, NULL);
|
|
ldlm_namespace_free_prior(obd->obd_namespace, imp,
|
|
obd->obd_force);
|
|
}
|
|
|
|
/* There's no need to hold sem while disconnecting an import,
|
|
* and it may actually cause deadlock in GSS.
|
|
*/
|
|
up_write(&cli->cl_sem);
|
|
rc = ptlrpc_disconnect_import(imp, 0);
|
|
down_write(&cli->cl_sem);
|
|
|
|
ptlrpc_invalidate_import(imp);
|
|
|
|
out_disconnect:
|
|
/* Use server style - class_disconnect should be always called for
|
|
* o_disconnect.
|
|
*/
|
|
err = class_disconnect(exp);
|
|
if (!rc && err)
|
|
rc = err;
|
|
|
|
up_write(&cli->cl_sem);
|
|
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL(client_disconnect_export);
|
|
|
|
/**
|
|
* Packs current SLV and Limit into \a req.
|
|
*/
|
|
int target_pack_pool_reply(struct ptlrpc_request *req)
|
|
{
|
|
struct obd_device *obd;
|
|
|
|
/* Check that we still have all structures alive as this may
|
|
* be some late RPC at shutdown time.
|
|
*/
|
|
if (unlikely(!req->rq_export || !req->rq_export->exp_obd ||
|
|
!exp_connect_lru_resize(req->rq_export))) {
|
|
lustre_msg_set_slv(req->rq_repmsg, 0);
|
|
lustre_msg_set_limit(req->rq_repmsg, 0);
|
|
return 0;
|
|
}
|
|
|
|
/* OBD is alive here as export is alive, which we checked above. */
|
|
obd = req->rq_export->exp_obd;
|
|
|
|
read_lock(&obd->obd_pool_lock);
|
|
lustre_msg_set_slv(req->rq_repmsg, obd->obd_pool_slv);
|
|
lustre_msg_set_limit(req->rq_repmsg, obd->obd_pool_limit);
|
|
read_unlock(&obd->obd_pool_lock);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(target_pack_pool_reply);
|
|
|
|
static int
|
|
target_send_reply_msg(struct ptlrpc_request *req, int rc, int fail_id)
|
|
{
|
|
if (OBD_FAIL_CHECK_ORSET(fail_id & ~OBD_FAIL_ONCE, OBD_FAIL_ONCE)) {
|
|
DEBUG_REQ(D_ERROR, req, "dropping reply");
|
|
return -ECOMM;
|
|
}
|
|
|
|
if (unlikely(rc)) {
|
|
DEBUG_REQ(D_NET, req, "processing error (%d)", rc);
|
|
req->rq_status = rc;
|
|
return ptlrpc_send_error(req, 1);
|
|
}
|
|
|
|
DEBUG_REQ(D_NET, req, "sending reply");
|
|
return ptlrpc_send_reply(req, PTLRPC_REPLY_MAYBE_DIFFICULT);
|
|
}
|
|
|
|
void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id)
|
|
{
|
|
struct ptlrpc_service_part *svcpt;
|
|
int netrc;
|
|
struct ptlrpc_reply_state *rs;
|
|
struct obd_export *exp;
|
|
|
|
if (req->rq_no_reply)
|
|
return;
|
|
|
|
svcpt = req->rq_rqbd->rqbd_svcpt;
|
|
rs = req->rq_reply_state;
|
|
if (!rs || !rs->rs_difficult) {
|
|
/* no notifiers */
|
|
target_send_reply_msg(req, rc, fail_id);
|
|
return;
|
|
}
|
|
|
|
/* must be an export if locks saved */
|
|
LASSERT(req->rq_export);
|
|
/* req/reply consistent */
|
|
LASSERT(rs->rs_svcpt == svcpt);
|
|
|
|
/* "fresh" reply */
|
|
LASSERT(!rs->rs_scheduled);
|
|
LASSERT(!rs->rs_scheduled_ever);
|
|
LASSERT(!rs->rs_handled);
|
|
LASSERT(!rs->rs_on_net);
|
|
LASSERT(!rs->rs_export);
|
|
LASSERT(list_empty(&rs->rs_obd_list));
|
|
LASSERT(list_empty(&rs->rs_exp_list));
|
|
|
|
exp = class_export_get(req->rq_export);
|
|
|
|
/* disable reply scheduling while I'm setting up */
|
|
rs->rs_scheduled = 1;
|
|
rs->rs_on_net = 1;
|
|
rs->rs_xid = req->rq_xid;
|
|
rs->rs_transno = req->rq_transno;
|
|
rs->rs_export = exp;
|
|
rs->rs_opc = lustre_msg_get_opc(req->rq_reqmsg);
|
|
|
|
spin_lock(&exp->exp_uncommitted_replies_lock);
|
|
CDEBUG(D_NET, "rs transno = %llu, last committed = %llu\n",
|
|
rs->rs_transno, exp->exp_last_committed);
|
|
if (rs->rs_transno > exp->exp_last_committed) {
|
|
/* not committed already */
|
|
list_add_tail(&rs->rs_obd_list,
|
|
&exp->exp_uncommitted_replies);
|
|
}
|
|
spin_unlock(&exp->exp_uncommitted_replies_lock);
|
|
|
|
spin_lock(&exp->exp_lock);
|
|
list_add_tail(&rs->rs_exp_list, &exp->exp_outstanding_replies);
|
|
spin_unlock(&exp->exp_lock);
|
|
|
|
netrc = target_send_reply_msg(req, rc, fail_id);
|
|
|
|
spin_lock(&svcpt->scp_rep_lock);
|
|
|
|
atomic_inc(&svcpt->scp_nreps_difficult);
|
|
|
|
if (netrc != 0) {
|
|
/* error sending: reply is off the net. Also we need +1
|
|
* reply ref until ptlrpc_handle_rs() is done
|
|
* with the reply state (if the send was successful, there
|
|
* would have been +1 ref for the net, which
|
|
* reply_out_callback leaves alone)
|
|
*/
|
|
rs->rs_on_net = 0;
|
|
ptlrpc_rs_addref(rs);
|
|
}
|
|
|
|
spin_lock(&rs->rs_lock);
|
|
if (rs->rs_transno <= exp->exp_last_committed ||
|
|
(!rs->rs_on_net && !rs->rs_no_ack) ||
|
|
list_empty(&rs->rs_exp_list) || /* completed already */
|
|
list_empty(&rs->rs_obd_list)) {
|
|
CDEBUG(D_HA, "Schedule reply immediately\n");
|
|
ptlrpc_dispatch_difficult_reply(rs);
|
|
} else {
|
|
list_add(&rs->rs_list, &svcpt->scp_rep_active);
|
|
rs->rs_scheduled = 0; /* allow notifier to schedule */
|
|
}
|
|
spin_unlock(&rs->rs_lock);
|
|
spin_unlock(&svcpt->scp_rep_lock);
|
|
}
|
|
EXPORT_SYMBOL(target_send_reply);
|
|
|
|
enum ldlm_mode lck_compat_array[] = {
|
|
[LCK_EX] = LCK_COMPAT_EX,
|
|
[LCK_PW] = LCK_COMPAT_PW,
|
|
[LCK_PR] = LCK_COMPAT_PR,
|
|
[LCK_CW] = LCK_COMPAT_CW,
|
|
[LCK_CR] = LCK_COMPAT_CR,
|
|
[LCK_NL] = LCK_COMPAT_NL,
|
|
[LCK_GROUP] = LCK_COMPAT_GROUP,
|
|
[LCK_COS] = LCK_COMPAT_COS,
|
|
};
|
|
|
|
/**
|
|
* Rather arbitrary mapping from LDLM error codes to errno values. This should
|
|
* not escape to the user level.
|
|
*/
|
|
int ldlm_error2errno(enum ldlm_error error)
|
|
{
|
|
int result;
|
|
|
|
switch (error) {
|
|
case ELDLM_OK:
|
|
result = 0;
|
|
break;
|
|
case ELDLM_LOCK_CHANGED:
|
|
result = -ESTALE;
|
|
break;
|
|
case ELDLM_LOCK_ABORTED:
|
|
result = -ENAVAIL;
|
|
break;
|
|
case ELDLM_LOCK_REPLACED:
|
|
result = -ESRCH;
|
|
break;
|
|
case ELDLM_NO_LOCK_DATA:
|
|
result = -ENOENT;
|
|
break;
|
|
case ELDLM_NAMESPACE_EXISTS:
|
|
result = -EEXIST;
|
|
break;
|
|
case ELDLM_BAD_NAMESPACE:
|
|
result = -EBADF;
|
|
break;
|
|
default:
|
|
if (((int)error) < 0) /* cast to signed type */
|
|
result = error; /* as enum ldlm_error can be unsigned */
|
|
else {
|
|
CERROR("Invalid DLM result code: %d\n", error);
|
|
result = -EPROTO;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
EXPORT_SYMBOL(ldlm_error2errno);
|
|
|
|
#if LUSTRE_TRACKS_LOCK_EXP_REFS
|
|
void ldlm_dump_export_locks(struct obd_export *exp)
|
|
{
|
|
spin_lock(&exp->exp_locks_list_guard);
|
|
if (!list_empty(&exp->exp_locks_list)) {
|
|
struct ldlm_lock *lock;
|
|
|
|
CERROR("dumping locks for export %p,ignore if the unmount doesn't hang\n",
|
|
exp);
|
|
list_for_each_entry(lock, &exp->exp_locks_list,
|
|
l_exp_refs_link)
|
|
LDLM_ERROR(lock, "lock:");
|
|
}
|
|
spin_unlock(&exp->exp_locks_list_guard);
|
|
}
|
|
#endif
|