--- /dev/null
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * 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.
+ *
+ * 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
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
+ *
+ * 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) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2012, Whamcloud, Inc.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/ofd/ofd_recovery.c
+ *
+ * Author: Alex Zhuravlev <bzzz@whamcloud.com>
+ * Author: Mikhail Pershin <tappro@whamcloud.com>
+ */
+
+#define DEBUG_SUBSYSTEM S_FILTER
+
+#include "ofd_internal.h"
+
+struct thandle *ofd_trans_create(const struct lu_env *env,
+ struct ofd_device *ofd)
+{
+ struct ofd_thread_info *info = ofd_info(env);
+ struct thandle *th;
+
+ LASSERT(info);
+
+ th = dt_trans_create(env, ofd->ofd_osd);
+ if (IS_ERR(th))
+ return th;
+
+ /* export can require sync operations */
+ if (info->fti_exp != NULL)
+ th->th_sync |= info->fti_exp->exp_need_sync;
+ return th;
+}
+
+int ofd_trans_start(const struct lu_env *env, struct ofd_device *ofd,
+ struct ofd_object *obj, struct thandle *th)
+{
+ struct ofd_thread_info *info = ofd_info(env);
+ int rc;
+
+ if (info->fti_exp == NULL)
+ return 0;
+
+ /* declare last_rcvd update */
+ rc = dt_declare_record_write(env, ofd->ofd_lut.lut_last_rcvd,
+ sizeof(struct lsd_client_data),
+ info->fti_exp->exp_target_data.ted_lr_off,
+ th);
+ if (rc)
+ RETURN(rc);
+
+ /* declare last_rcvd header update */
+ rc = dt_declare_record_write(env, ofd->ofd_lut.lut_last_rcvd,
+ sizeof(ofd->ofd_lut.lut_lsd), 0, th);
+ if (rc)
+ RETURN(rc);
+
+ /* version change is required for this object */
+ if (obj) {
+ ofd_info(env)->fti_obj = obj;
+ rc = dt_declare_version_set(env, ofd_object_child(obj), th);
+ if (rc)
+ RETURN(rc);
+ }
+
+ return dt_trans_start(env, ofd->ofd_osd, th);
+}
+
+void ofd_trans_stop(const struct lu_env *env, struct ofd_device *ofd,
+ struct thandle *th, int rc)
+{
+ th->th_result = rc;
+ dt_trans_stop(env, ofd->ofd_osd, th);
+}
+
+/*
+ * last_rcvd & last_committed update callbacks
+ */
+static int ofd_last_rcvd_update(struct ofd_thread_info *info,
+ struct thandle *th)
+{
+ struct ofd_device *ofd = ofd_exp(info->fti_exp);
+ struct filter_export_data *fed;
+ struct lsd_client_data *lcd;
+ __s32 rc = th->th_result;
+ __u64 *transno_p;
+ loff_t off;
+ int err;
+
+ ENTRY;
+
+ LASSERT(ofd);
+ LASSERT(info->fti_exp);
+
+ fed = &info->fti_exp->exp_filter_data;
+ LASSERT(fed);
+ lcd = fed->fed_ted.ted_lcd;
+ /* if the export has already been disconnected, we have no last_rcvd
+ * slot, update server data with latest transno then */
+ if (lcd == NULL) {
+ CWARN("commit transaction for disconnected client %s: rc %d\n",
+ info->fti_exp->exp_client_uuid.uuid, rc);
+ err = lut_server_data_write(info->fti_env, &ofd->ofd_lut, th);
+ RETURN(err);
+ }
+ /* ofd connect may cause transaction before export has last_rcvd
+ * slot */
+ if (fed->fed_ted.ted_lr_off < 0)
+ RETURN(0);
+ off = fed->fed_ted.ted_lr_off;
+
+ transno_p = &lcd->lcd_last_transno;
+ lcd->lcd_last_xid = info->fti_xid;
+
+ /*
+ * When we store zero transno in mcd we can lost last transno value
+ * because mcd contains 0, but msd is not yet written
+ * The server data should be updated also if the latest
+ * transno is rewritten by zero. See the bug 11125 for details.
+ */
+ if (info->fti_transno == 0 &&
+ *transno_p == ofd->ofd_lut.lut_last_transno) {
+ cfs_spin_lock(&ofd->ofd_lut.lut_translock);
+ ofd->ofd_lut.lut_lsd.lsd_last_transno =
+ ofd->ofd_lut.lut_last_transno;
+ cfs_spin_unlock(&ofd->ofd_lut.lut_translock);
+ lut_server_data_write(info->fti_env, &ofd->ofd_lut, th);
+ }
+
+ *transno_p = info->fti_transno;
+ LASSERT(fed->fed_ted.ted_lr_off > 0);
+ err = lut_client_data_write(info->fti_env, &ofd->ofd_lut, lcd,
+ &off, th);
+
+ RETURN(err);
+}
+
+/* Update last_rcvd records with the latest transaction data */
+int ofd_txn_stop_cb(const struct lu_env *env, struct thandle *txn,
+ void *cookie)
+{
+ struct ofd_device *ofd = cookie;
+ struct ofd_thread_info *info;
+
+ ENTRY;
+
+ info = lu_context_key_get(&env->le_ctx, &ofd_thread_key);
+
+ if (info->fti_exp == NULL)
+ RETURN(0);
+
+ LASSERT(ofd_exp(info->fti_exp) == ofd);
+ if (info->fti_has_trans) {
+ if (info->fti_mult_trans == 0) {
+ CERROR("More than one transaction "LPU64"\n",
+ info->fti_transno);
+ RETURN(0);
+ }
+ /* we need another transno to be assigned */
+ info->fti_transno = 0;
+ } else if (txn->th_result == 0) {
+ info->fti_has_trans = 1;
+ }
+
+ cfs_spin_lock(&ofd->ofd_lut.lut_translock);
+ if (txn->th_result != 0) {
+ if (info->fti_transno != 0) {
+ CERROR("Replay transno "LPU64" failed: rc %d\n",
+ info->fti_transno, txn->th_result);
+ info->fti_transno = 0;
+ }
+ } else if (info->fti_transno == 0) {
+ info->fti_transno = ++ofd->ofd_lut.lut_last_transno;
+ } else {
+ /* should be replay */
+ if (info->fti_transno > ofd->ofd_lut.lut_last_transno)
+ ofd->ofd_lut.lut_last_transno = info->fti_transno;
+ }
+ cfs_spin_unlock(&ofd->ofd_lut.lut_translock);
+
+ /** VBR: set new versions */
+ if (txn->th_result == 0 && info->fti_obj != NULL) {
+ dt_version_set(env, ofd_object_child(info->fti_obj),
+ info->fti_transno, txn);
+ info->fti_obj = NULL;
+ }
+
+ /* filling reply data */
+ CDEBUG(D_INODE, "transno = %llu, last_committed = %llu\n",
+ info->fti_transno, ofd_obd(ofd)->obd_last_committed);
+
+ /* if can't add callback, do sync write */
+ txn->th_sync = !!lut_last_commit_cb_add(txn, &ofd->ofd_lut,
+ info->fti_exp,
+ info->fti_transno);
+
+ return ofd_last_rcvd_update(info, txn);
+}
+
git://git.whamcloud.com / fs / lustre-release.git / blobdiff