-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
+/*
+ * GPL HEADER START
*
- * Copyright (C) 2001-2004 Cluster File Systems, Inc.
- * Author: Andreas Dilger <adilger@clusterfs.com>
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
- * This file is part of Lustre, http://www.lustre.org.
+ * 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.
*
- * Lustre is free 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).
*
- * 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
- * GNU General Public License 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
*
- * You should have received a copy of the GNU General Public License
- * along with Lustre; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * 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.
*
- * remote api for llog - client side
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2012, Whamcloud, Inc.
+ */
+/*
+ * 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
-#ifndef EXPORT_SYMTAB
-#define EXPORT_SYMTAB
-#endif
-
#ifdef __KERNEL__
-#include <linux/fs.h>
+#include <libcfs/libcfs.h>
#else
#include <liblustre.h>
#endif
-#include <linux/obd_class.h>
-#include <linux/lustre_log.h>
-#include <linux/lustre_net.h>
-#include <portals/list.h>
+#include <obd_class.h>
+#include <lustre_log.h>
+#include <lustre_net.h>
+#include <libcfs/list.h>
+
+#define LLOG_CLIENT_ENTRY(ctxt, imp) do { \
+ cfs_mutex_lock(&ctxt->loc_mutex); \
+ 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_unlock(&ctxt->loc_mutex); \
+ return (-EINVAL); \
+ } \
+ cfs_mutex_unlock(&ctxt->loc_mutex); \
+} while(0)
+
+#define LLOG_CLIENT_EXIT(ctxt, imp) do { \
+ cfs_mutex_lock(&ctxt->loc_mutex); \
+ 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_unlock(&ctxt->loc_mutex); \
+} 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,
- struct llog_logid *logid, char *name)
+ struct llog_logid *logid, char *name)
{
- struct obd_import *imp;
- struct llogd_body req_body;
- struct llogd_body *body;
- struct llog_handle *handle;
+ struct obd_import *imp;
+ struct llogd_body *body;
+ struct llog_handle *handle;
struct ptlrpc_request *req = NULL;
- int size[2] = {sizeof(req_body)};
- char *tmp[2] = {(char*) &req_body};
- int bufcount = 1;
- int repsize[] = {sizeof (req_body)};
- int rc;
+ int rc;
ENTRY;
- LASSERT(ctxt->loc_imp);
- imp = ctxt->loc_imp;
+ LLOG_CLIENT_ENTRY(ctxt, imp);
handle = llog_alloc_handle();
if (handle == NULL)
RETURN(-ENOMEM);
*res = handle;
- memset(&req_body, 0, sizeof(req_body));
+ req = ptlrpc_request_alloc(imp, &RQF_LLOG_ORIGIN_HANDLE_CREATE);
+ if (req == NULL)
+ GOTO(err_free, rc = -ENOMEM);
+
+ if (name)
+ req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
+ strlen(name) + 1);
+
+ rc = ptlrpc_request_pack(req, LUSTRE_LOG_VERSION,
+ LLOG_ORIGIN_HANDLE_CREATE);
+ if (rc) {
+ ptlrpc_request_free(req);
+ req = NULL;
+ GOTO(err_free, rc);
+ }
+ ptlrpc_request_set_replen(req);
+
+ body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_BODY);
if (logid)
- req_body.lgd_logid = *logid;
- req_body.lgd_ctxt_idx = ctxt->loc_idx - 1;
+ body->lgd_logid = *logid;
+ body->lgd_ctxt_idx = ctxt->loc_idx - 1;
if (name) {
- size[bufcount] = strlen(name) + 1;
- tmp[bufcount] = name;
- bufcount++;
+ char *tmp;
+ tmp = req_capsule_client_sized_get(&req->rq_pill, &RMF_NAME,
+ strlen(name) + 1);
+ LASSERT(tmp);
+ strcpy(tmp, name);
}
- req = ptlrpc_prep_req(imp, LLOG_ORIGIN_HANDLE_CREATE,bufcount,size,tmp);
- if (!req)
- GOTO(err_free, rc = -ENOMEM);
-
- req->rq_replen = lustre_msg_size(1, repsize);
rc = ptlrpc_queue_wait(req);
if (rc)
GOTO(err_free, rc);
- body = lustre_swab_repbuf(req, 0, sizeof(*body),
- lustre_swab_llogd_body);
- if (body == NULL) {
- CERROR ("Can't unpack llogd_body\n");
+ body = req_capsule_server_get(&req->rq_pill, &RMF_LLOGD_BODY);
+ if (body == NULL)
GOTO(err_free, rc =-EFAULT);
- }
handle->lgh_id = body->lgd_logid;
handle->lgh_ctxt = ctxt;
-
+ EXIT;
out:
- if (req)
- ptlrpc_req_finished(req);
- RETURN(rc);
-
+ 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_prev_block(struct llog_handle *loghandle,
- int prev_idx, void *buf, int len)
+static int llog_client_destroy(struct llog_handle *loghandle)
{
- struct obd_import *imp = loghandle->lgh_ctxt->loc_imp;
+ struct obd_import *imp;
struct ptlrpc_request *req = NULL;
- struct llogd_body *body;
- void * ptr;
- int size = sizeof(*body);
- int repsize[2] = {sizeof (*body)};
- int rc;
+ struct llogd_body *body;
+ int rc;
ENTRY;
-
- req = ptlrpc_prep_req(imp, LLOG_ORIGIN_HANDLE_PREV_BLOCK, 1,&size,NULL);
- if (!req)
- GOTO(out, rc = -ENOMEM);
-
- body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*body));
+
+ 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)
+ 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;
body->lgd_llh_flags = loghandle->lgh_hdr->llh_flags;
- body->lgd_index = prev_idx;
- body->lgd_len = len;
- repsize[1] = len;
-
- req->rq_replen = lustre_msg_size(2, repsize);
+
+ ptlrpc_request_set_replen(req);
rc = ptlrpc_queue_wait(req);
- if (rc)
- GOTO(out, rc);
-
- body = lustre_swab_repbuf(req, 0, sizeof(*body),
- lustre_swab_llogd_body);
- if (body == NULL) {
- CERROR ("Can't unpack llogd_body\n");
- GOTO(out, rc =-EFAULT);
- }
-
- ptr = lustre_msg_buf(req->rq_repmsg, 1, len);
- if (ptr == NULL) {
- CERROR ("Can't unpack bitmap\n");
- GOTO(out, rc =-EFAULT);
- }
-
- memcpy(buf, ptr, len);
-
-out:
- if (req)
- ptlrpc_req_finished(req);
+
+ ptlrpc_req_finished(req);
+err_exit:
+ LLOG_CLIENT_EXIT(loghandle->lgh_ctxt, imp);
RETURN(rc);
}
+
static int llog_client_next_block(struct llog_handle *loghandle,
int *cur_idx, int next_idx,
__u64 *cur_offset, void *buf, int len)
{
- struct obd_import *imp = loghandle->lgh_ctxt->loc_imp;
+ struct obd_import *imp;
struct ptlrpc_request *req = NULL;
- struct llogd_body *body;
- void * ptr;
- int size = sizeof(*body);
- int repsize[2] = {sizeof (*body)};
- int rc;
+ struct llogd_body *body;
+ void *ptr;
+ int rc;
ENTRY;
- req = ptlrpc_prep_req(imp, LLOG_ORIGIN_HANDLE_NEXT_BLOCK, 1,&size,NULL);
- if (!req)
- GOTO(out, rc = -ENOMEM);
-
- body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*body));
+ 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)
+ 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;
body->lgd_llh_flags = loghandle->lgh_hdr->llh_flags;
body->lgd_saved_index = *cur_idx;
body->lgd_len = len;
body->lgd_cur_offset = *cur_offset;
- repsize[1] = len;
- req->rq_replen = lustre_msg_size(2, repsize);
+ req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_SERVER, len);
+ ptlrpc_request_set_replen(req);
rc = ptlrpc_queue_wait(req);
if (rc)
GOTO(out, rc);
- body = lustre_swab_repbuf(req, 0, sizeof(*body),
- lustre_swab_llogd_body);
- if (body == NULL) {
- CERROR ("Can't unpack llogd_body\n");
+ body = req_capsule_server_get(&req->rq_pill, &RMF_LLOGD_BODY);
+ if (body == NULL)
GOTO(out, rc =-EFAULT);
- }
- ptr = lustre_msg_buf(req->rq_repmsg, 1, len);
- if (ptr == NULL) {
- CERROR ("Can't unpack bitmap\n");
+ /* The log records are swabbed as they are processed */
+ ptr = req_capsule_server_get(&req->rq_pill, &RMF_EADATA);
+ if (ptr == NULL)
GOTO(out, rc =-EFAULT);
- }
*cur_idx = body->lgd_saved_index;
*cur_offset = body->lgd_cur_offset;
memcpy(buf, ptr, len);
-
+ EXIT;
out:
- if (req)
- ptlrpc_req_finished(req);
- RETURN(rc);
+ 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;
+
+ 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)
+ 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;
+ body->lgd_llh_flags = loghandle->lgh_hdr->llh_flags;
+ body->lgd_index = prev_idx;
+ body->lgd_len = len;
+
+ req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_SERVER, len);
+ ptlrpc_request_set_replen(req);
+
+ rc = ptlrpc_queue_wait(req);
+ if (rc)
+ GOTO(out, rc);
+
+ body = req_capsule_server_get(&req->rq_pill, &RMF_LLOGD_BODY);
+ if (body == NULL)
+ GOTO(out, rc =-EFAULT);
+
+ ptr = req_capsule_server_get(&req->rq_pill, &RMF_EADATA);
+ if (ptr == NULL)
+ GOTO(out, rc =-EFAULT);
+
+ memcpy(buf, ptr, len);
+ 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 = handle->lgh_ctxt->loc_imp;
+ struct obd_import *imp;
struct ptlrpc_request *req = NULL;
- struct llogd_body *body;
- struct llog_log_hdr *hdr;
- struct llog_rec_hdr *llh_hdr;
- int size = sizeof(*body);
- int repsize = sizeof (*hdr);
- int rc;
+ struct llogd_body *body;
+ struct llog_log_hdr *hdr;
+ struct llog_rec_hdr *llh_hdr;
+ int rc;
ENTRY;
- req = ptlrpc_prep_req(imp, LLOG_ORIGIN_HANDLE_READ_HEADER,1,&size,NULL);
- if (!req)
- GOTO(out, rc = -ENOMEM);
+ 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)
+ GOTO(err_exit, rc = -ENOMEM);
- body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*body));
+ body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_BODY);
body->lgd_logid = handle->lgh_id;
body->lgd_ctxt_idx = handle->lgh_ctxt->loc_idx - 1;
body->lgd_llh_flags = handle->lgh_hdr->llh_flags;
- req->rq_replen = lustre_msg_size(1, &repsize);
+ ptlrpc_request_set_replen(req);
rc = ptlrpc_queue_wait(req);
if (rc)
GOTO(out, rc);
- hdr = lustre_swab_repbuf(req, 0, sizeof(*hdr), lustre_swab_llog_hdr);
- if (hdr == NULL) {
- CERROR ("Can't unpack llog_hdr\n");
+ hdr = req_capsule_server_get(&req->rq_pill, &RMF_LLOG_LOG_HDR);
+ if (hdr == NULL)
GOTO(out, rc =-EFAULT);
- }
memcpy(handle->lgh_hdr, hdr, sizeof (*hdr));
handle->lgh_last_idx = handle->lgh_hdr->llh_tail.lrt_index;
CERROR("you may need to re-run lconf --write_conf.\n");
rc = -EIO;
}
-
+ EXIT;
out:
- if (req)
- ptlrpc_req_finished(req);
- RETURN(rc);
+ ptlrpc_req_finished(req);
+err_exit:
+ LLOG_CLIENT_EXIT(handle->lgh_ctxt, imp);
+ return rc;
}
static int llog_client_close(struct llog_handle *handle)
{
- int rc = 0;
-
- RETURN(rc);
+ /* this doesn't call LLOG_ORIGIN_HANDLE_CLOSE because
+ the servers all close the file at the end of every
+ other LLOG_ RPC. */
+ return(0);
}
struct llog_operations llog_client_ops = {
- lop_prev_block: llog_client_prev_block,
lop_next_block: llog_client_next_block,
+ lop_prev_block: llog_client_prev_block,
lop_read_header: llog_client_read_header,
lop_create: llog_client_create,
+ lop_destroy: llog_client_destroy,
lop_close: llog_client_close,
};
git://git.whamcloud.com / fs / lustre-release.git / blobdiff