/* -*- 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 Lustre, http://www.lustre.org.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
- * 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 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 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.
+ * 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).
*
- * 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.
+ * 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 2008 Sun Microsystems, Inc. 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
#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 <obd_class.h>
+#include <lustre_log.h>
+#include <lustre_net.h>
#include <libcfs/list.h>
+#define LLOG_CLIENT_ENTRY(ctxt, imp) do { \
+ 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; \
+ mutex_up(&ctxt->loc_sem); \
+ return (-EINVAL); \
+ } \
+ mutex_up(&ctxt->loc_sem); \
+} while(0)
+
+#define LLOG_CLIENT_EXIT(ctxt, imp) do { \
+ mutex_down(&ctxt->loc_sem); \
+ if (ctxt->loc_imp != imp) \
+ CWARN("loc_imp has changed from %p to %p", \
+ ctxt->loc_imp, imp); \
+ class_import_put(imp); \
+ 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,
- 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 ptlrpc_request *req = NULL;
- int size[2] = {sizeof(req_body)};
- char *tmp[2] = {(char*) &req_body};
- int bufcount = 1;
- int repsize[] = {sizeof (req_body)};
+ __u32 size[3] = { sizeof(struct ptlrpc_body), sizeof(req_body) };
+ char *bufs[3] = { NULL, (char*)&req_body };
+ int bufcount = 2;
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);
+ GOTO(out, rc = -ENOMEM);
*res = handle;
memset(&req_body, 0, sizeof(req_body));
if (name) {
size[bufcount] = strlen(name) + 1;
- tmp[bufcount] = name;
+ bufs[bufcount] = name;
bufcount++;
}
- req = ptlrpc_prep_req(imp, LLOG_ORIGIN_HANDLE_CREATE,bufcount,size,tmp);
+ req = ptlrpc_prep_req(imp, LUSTRE_LOG_VERSION,
+ LLOG_ORIGIN_HANDLE_CREATE, bufcount, size, bufs);
if (!req)
GOTO(err_free, rc = -ENOMEM);
- req->rq_replen = lustre_msg_size(1, repsize);
+ ptlrpc_req_set_repsize(req, 2, size);
rc = ptlrpc_queue_wait(req);
if (rc)
GOTO(err_free, rc);
- body = lustre_swab_repbuf(req, 0, sizeof(*body),
+ body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
lustre_swab_llogd_body);
if (body == NULL) {
CERROR ("Can't unpack llogd_body\n");
out:
if (req)
ptlrpc_req_finished(req);
+ LLOG_CLIENT_EXIT(ctxt, imp);
RETURN(rc);
err_free:
goto out;
}
+static int llog_client_destroy(struct llog_handle *loghandle)
+{
+ struct obd_import *imp;
+ struct ptlrpc_request *req = NULL;
+ struct llogd_body *body;
+ __u32 size[] = { sizeof(struct ptlrpc_body), sizeof(*body) };
+ int rc;
+ ENTRY;
+
+ LLOG_CLIENT_ENTRY(loghandle->lgh_ctxt, imp);
+ req = ptlrpc_prep_req(imp, LUSTRE_LOG_VERSION,
+ LLOG_ORIGIN_HANDLE_DESTROY, 2, size, NULL);
+ if (!req)
+ GOTO(out, rc = -ENOMEM);
+
+ body = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF, sizeof(*body));
+ body->lgd_logid = loghandle->lgh_id;
+ body->lgd_llh_flags = loghandle->lgh_hdr->llh_flags;
+
+ ptlrpc_req_set_repsize(req, 2, size);
+ rc = ptlrpc_queue_wait(req);
+
+ ptlrpc_req_finished(req);
+out:
+ 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)};
+ __u32 size[3] = { sizeof(struct ptlrpc_body), sizeof(*body) };
int rc;
ENTRY;
- req = ptlrpc_prep_req(imp, LLOG_ORIGIN_HANDLE_NEXT_BLOCK, 1,&size,NULL);
+ LLOG_CLIENT_ENTRY(loghandle->lgh_ctxt, imp);
+ req = ptlrpc_prep_req(imp, LUSTRE_LOG_VERSION,
+ LLOG_ORIGIN_HANDLE_NEXT_BLOCK, 2, size, NULL);
if (!req)
- GOTO(out, rc = -ENOMEM);
+ GOTO(out, rc =-ENOMEM);
- body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*body));
+ body = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF, sizeof(*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);
+ size[REPLY_REC_OFF + 1] = len;
+ ptlrpc_req_set_repsize(req, 3, size);
rc = ptlrpc_queue_wait(req);
if (rc)
GOTO(out, rc);
- body = lustre_swab_repbuf(req, 0, sizeof(*body),
+ body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
lustre_swab_llogd_body);
if (body == NULL) {
CERROR ("Can't unpack llogd_body\n");
}
/* The log records are swabbed as they are processed */
- ptr = lustre_msg_buf(req->rq_repmsg, 1, len);
+ ptr = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF + 1, len);
if (ptr == NULL) {
CERROR ("Can't unpack bitmap\n");
GOTO(out, rc =-EFAULT);
out:
if (req)
ptlrpc_req_finished(req);
+ 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;
+ __u32 size[3] = { sizeof(struct ptlrpc_body), sizeof(*body) };
+ int rc;
+ ENTRY;
+
+ LLOG_CLIENT_ENTRY(loghandle->lgh_ctxt, imp);
+ req = ptlrpc_prep_req(imp, LUSTRE_LOG_VERSION,
+ LLOG_ORIGIN_HANDLE_PREV_BLOCK, 2, size, NULL);
+ if (!req)
+ GOTO(out, rc = -ENOMEM);
+
+ body = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF, sizeof(*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;
+
+ size[REPLY_REC_OFF + 1] = len;
+ ptlrpc_req_set_repsize(req, 3, size);
+ rc = ptlrpc_queue_wait(req);
+ if (rc)
+ GOTO(out, rc);
+
+ body = lustre_swab_repbuf(req, REPLY_REC_OFF, 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, REPLY_REC_OFF + 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);
+ 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);
+ __u32 size[2] = { sizeof(struct ptlrpc_body), sizeof(*body) };
+ __u32 repsize[2] = { sizeof(struct ptlrpc_body), sizeof(*hdr) };
int rc;
ENTRY;
- req = ptlrpc_prep_req(imp, LLOG_ORIGIN_HANDLE_READ_HEADER,1,&size,NULL);
+ LLOG_CLIENT_ENTRY(handle->lgh_ctxt, imp);
+ req = ptlrpc_prep_req(imp, LUSTRE_LOG_VERSION,
+ LLOG_ORIGIN_HANDLE_READ_HEADER, 2, size, NULL);
if (!req)
GOTO(out, rc = -ENOMEM);
- body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*body));
+ body = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF, sizeof(*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_req_set_repsize(req, 2, repsize);
rc = ptlrpc_queue_wait(req);
if (rc)
GOTO(out, rc);
- hdr = lustre_swab_repbuf(req, 0, sizeof(*hdr), lustre_swab_llog_hdr);
+ hdr = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*hdr),
+ lustre_swab_llog_hdr);
if (hdr == NULL) {
CERROR ("Can't unpack llog_hdr\n");
GOTO(out, rc =-EFAULT);
out:
if (req)
ptlrpc_req_finished(req);
+ 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_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,
};