/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
*
- * Copyright (C) 2001-2004 Cluster File Systems, Inc.
- * Author: Andreas Dilger <adilger@clusterfs.com>
+ * GPL HEADER START
*
- * This file is part of the Lustre file system, http://www.lustre.org
- * Lustre is a trademark of Cluster File Systems, Inc.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
- * You may have signed or agreed to another license before downloading
- * this software. If so, you are bound by the terms and conditions
- * of that agreement, and the following does not apply to you. See the
- * LICENSE file included with this distribution for more information.
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
*
- * If you did not agree to a different license, then this copy of Lustre
- * is open source software; you can redistribute it and/or modify it
- * under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
*
- * In either case, Lustre is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * license text for more details.
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
*
- * remote api for llog - client side
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
*
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/ptlrpc/llog_client.c
+ *
+ * remote api for llog - client side
+ *
+ * Author: Andreas Dilger <adilger@clusterfs.com>
*/
#define DEBUG_SUBSYSTEM S_LOG
#include <lustre_net.h>
#include <libcfs/list.h>
+#define LLOG_CLIENT_ENTRY(ctxt, imp) do { \
+ cfs_mutex_down(&ctxt->loc_sem); \
+ if (ctxt->loc_imp) { \
+ imp = class_import_get(ctxt->loc_imp); \
+ } else { \
+ CERROR("ctxt->loc_imp == NULL for context idx %d." \
+ "Unable to complete MDS/OSS recovery," \
+ "but I'll try again next time. Not fatal.\n", \
+ ctxt->loc_idx); \
+ imp = NULL; \
+ cfs_mutex_up(&ctxt->loc_sem); \
+ return (-EINVAL); \
+ } \
+ cfs_mutex_up(&ctxt->loc_sem); \
+} while(0)
+
+#define LLOG_CLIENT_EXIT(ctxt, imp) do { \
+ cfs_mutex_down(&ctxt->loc_sem); \
+ if (ctxt->loc_imp != imp) \
+ CWARN("loc_imp has changed from %p to %p\n", \
+ ctxt->loc_imp, imp); \
+ class_import_put(imp); \
+ cfs_mutex_up(&ctxt->loc_sem); \
+} while(0)
+
/* This is a callback from the llog_* functions.
* Assumes caller has already pushed us into the kernel context. */
static int llog_client_create(struct llog_ctxt *ctxt, struct llog_handle **res,
int rc;
ENTRY;
- if (ctxt->loc_imp == NULL) {
- /* This used to be an assert; bug 6200 */
- CERROR("ctxt->loc_imp == NULL for context idx %d. Unable to "
- "complete MDS/OSS recovery, but I'll try again next "
- "time. Not fatal.\n", ctxt->loc_idx);
- RETURN(-EINVAL);
- }
- imp = ctxt->loc_imp;
+ LLOG_CLIENT_ENTRY(ctxt, imp);
handle = llog_alloc_handle();
if (handle == NULL)
LLOG_ORIGIN_HANDLE_CREATE);
if (rc) {
ptlrpc_request_free(req);
+ req = NULL;
GOTO(err_free, rc);
}
ptlrpc_request_set_replen(req);
handle->lgh_ctxt = ctxt;
EXIT;
out:
+ LLOG_CLIENT_EXIT(ctxt, imp);
ptlrpc_req_finished(req);
return rc;
err_free:
+ *res = NULL;
llog_free_handle(handle);
goto out;
}
static int llog_client_destroy(struct llog_handle *loghandle)
{
+ struct obd_import *imp;
struct ptlrpc_request *req = NULL;
struct llogd_body *body;
int rc;
ENTRY;
- req = ptlrpc_request_alloc_pack(loghandle->lgh_ctxt->loc_imp,
- &RQF_LLOG_ORIGIN_HANDLE_DESTROY,
+ LLOG_CLIENT_ENTRY(loghandle->lgh_ctxt, imp);
+ req = ptlrpc_request_alloc_pack(imp, &RQF_LLOG_ORIGIN_HANDLE_DESTROY,
LUSTRE_LOG_VERSION,
LLOG_ORIGIN_HANDLE_DESTROY);
if (req == NULL)
- RETURN(-ENOMEM);
+ GOTO(err_exit, rc =-ENOMEM);
body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_BODY);
body->lgd_logid = loghandle->lgh_id;
rc = ptlrpc_queue_wait(req);
ptlrpc_req_finished(req);
+err_exit:
+ LLOG_CLIENT_EXIT(loghandle->lgh_ctxt, imp);
RETURN(rc);
}
int *cur_idx, int next_idx,
__u64 *cur_offset, void *buf, int len)
{
+ struct obd_import *imp;
struct ptlrpc_request *req = NULL;
struct llogd_body *body;
void *ptr;
int rc;
ENTRY;
- req = ptlrpc_request_alloc_pack(loghandle->lgh_ctxt->loc_imp,
- &RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK,
+ LLOG_CLIENT_ENTRY(loghandle->lgh_ctxt, imp);
+ req = ptlrpc_request_alloc_pack(imp, &RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK,
LUSTRE_LOG_VERSION,
LLOG_ORIGIN_HANDLE_NEXT_BLOCK);
if (req == NULL)
- RETURN(-ENOMEM);
-
+ GOTO(err_exit, rc =-ENOMEM);
+
body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_BODY);
body->lgd_logid = loghandle->lgh_id;
body->lgd_ctxt_idx = loghandle->lgh_ctxt->loc_idx - 1;
EXIT;
out:
ptlrpc_req_finished(req);
+err_exit:
+ LLOG_CLIENT_EXIT(loghandle->lgh_ctxt, imp);
return rc;
}
static int llog_client_prev_block(struct llog_handle *loghandle,
int prev_idx, void *buf, int len)
{
+ struct obd_import *imp;
struct ptlrpc_request *req = NULL;
struct llogd_body *body;
void *ptr;
int rc;
ENTRY;
- req = ptlrpc_request_alloc_pack(loghandle->lgh_ctxt->loc_imp,
- &RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK,
+ LLOG_CLIENT_ENTRY(loghandle->lgh_ctxt, imp);
+ req = ptlrpc_request_alloc_pack(imp, &RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK,
LUSTRE_LOG_VERSION,
LLOG_ORIGIN_HANDLE_PREV_BLOCK);
if (req == NULL)
- RETURN(-ENOMEM);
+ GOTO(err_exit, rc = -ENOMEM);
body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_BODY);
body->lgd_logid = loghandle->lgh_id;
EXIT;
out:
ptlrpc_req_finished(req);
+err_exit:
+ LLOG_CLIENT_EXIT(loghandle->lgh_ctxt, imp);
return rc;
}
static int llog_client_read_header(struct llog_handle *handle)
{
+ struct obd_import *imp;
struct ptlrpc_request *req = NULL;
struct llogd_body *body;
struct llog_log_hdr *hdr;
int rc;
ENTRY;
- req = ptlrpc_request_alloc_pack(handle->lgh_ctxt->loc_imp,
- &RQF_LLOG_ORIGIN_HANDLE_READ_HEADER,
+ LLOG_CLIENT_ENTRY(handle->lgh_ctxt, imp);
+ req = ptlrpc_request_alloc_pack(imp,&RQF_LLOG_ORIGIN_HANDLE_READ_HEADER,
LUSTRE_LOG_VERSION,
LLOG_ORIGIN_HANDLE_READ_HEADER);
if (req == NULL)
- RETURN(-ENOMEM);
+ GOTO(err_exit, rc = -ENOMEM);
body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_BODY);
body->lgd_logid = handle->lgh_id;
EXIT;
out:
ptlrpc_req_finished(req);
+err_exit:
+ LLOG_CLIENT_EXIT(handle->lgh_ctxt, imp);
return rc;
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff