240 lines
7.0 KiB
C
240 lines
7.0 KiB
C
/*
|
|
* 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) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
|
|
* Use is subject to license terms.
|
|
*
|
|
* Copyright (c) 2012, 2015, Intel Corporation.
|
|
*/
|
|
/*
|
|
* This file is part of Lustre, http://www.lustre.org/
|
|
* Lustre is a trademark of Sun Microsystems, Inc.
|
|
*
|
|
* lustre/obdclass/llog_cat.c
|
|
*
|
|
* OST<->MDS recovery logging infrastructure.
|
|
*
|
|
* Invariants in implementation:
|
|
* - we do not share logs among different OST<->MDS connections, so that
|
|
* if an OST or MDS fails it need only look at log(s) relevant to itself
|
|
*
|
|
* Author: Andreas Dilger <adilger@clusterfs.com>
|
|
* Author: Alexey Zhuravlev <alexey.zhuravlev@intel.com>
|
|
* Author: Mikhail Pershin <mike.pershin@intel.com>
|
|
*/
|
|
|
|
#define DEBUG_SUBSYSTEM S_LOG
|
|
|
|
#include "../include/obd_class.h"
|
|
|
|
#include "llog_internal.h"
|
|
|
|
/* Open an existent log handle and add it to the open list.
|
|
* This log handle will be closed when all of the records in it are removed.
|
|
*
|
|
* Assumes caller has already pushed us into the kernel context and is locking.
|
|
* We return a lock on the handle to ensure nobody yanks it from us.
|
|
*
|
|
* This takes extra reference on llog_handle via llog_handle_get() and require
|
|
* this reference to be put by caller using llog_handle_put()
|
|
*/
|
|
static int llog_cat_id2handle(const struct lu_env *env,
|
|
struct llog_handle *cathandle,
|
|
struct llog_handle **res,
|
|
struct llog_logid *logid)
|
|
{
|
|
struct llog_handle *loghandle;
|
|
int rc = 0;
|
|
|
|
if (!cathandle)
|
|
return -EBADF;
|
|
|
|
down_write(&cathandle->lgh_lock);
|
|
list_for_each_entry(loghandle, &cathandle->u.chd.chd_head,
|
|
u.phd.phd_entry) {
|
|
struct llog_logid *cgl = &loghandle->lgh_id;
|
|
|
|
if (ostid_id(&cgl->lgl_oi) == ostid_id(&logid->lgl_oi) &&
|
|
ostid_seq(&cgl->lgl_oi) == ostid_seq(&logid->lgl_oi)) {
|
|
if (cgl->lgl_ogen != logid->lgl_ogen) {
|
|
CERROR("%s: log "DOSTID" generation %x != %x\n",
|
|
loghandle->lgh_ctxt->loc_obd->obd_name,
|
|
POSTID(&logid->lgl_oi), cgl->lgl_ogen,
|
|
logid->lgl_ogen);
|
|
continue;
|
|
}
|
|
loghandle->u.phd.phd_cat_handle = cathandle;
|
|
up_write(&cathandle->lgh_lock);
|
|
rc = 0;
|
|
goto out;
|
|
}
|
|
}
|
|
up_write(&cathandle->lgh_lock);
|
|
|
|
rc = llog_open(env, cathandle->lgh_ctxt, &loghandle, logid, NULL,
|
|
LLOG_OPEN_EXISTS);
|
|
if (rc < 0) {
|
|
CERROR("%s: error opening log id "DOSTID":%x: rc = %d\n",
|
|
cathandle->lgh_ctxt->loc_obd->obd_name,
|
|
POSTID(&logid->lgl_oi), logid->lgl_ogen, rc);
|
|
return rc;
|
|
}
|
|
|
|
rc = llog_init_handle(env, loghandle, LLOG_F_IS_PLAIN, NULL);
|
|
if (rc < 0) {
|
|
llog_close(env, loghandle);
|
|
loghandle = NULL;
|
|
return rc;
|
|
}
|
|
|
|
down_write(&cathandle->lgh_lock);
|
|
list_add(&loghandle->u.phd.phd_entry, &cathandle->u.chd.chd_head);
|
|
up_write(&cathandle->lgh_lock);
|
|
|
|
loghandle->u.phd.phd_cat_handle = cathandle;
|
|
loghandle->u.phd.phd_cookie.lgc_lgl = cathandle->lgh_id;
|
|
loghandle->u.phd.phd_cookie.lgc_index =
|
|
loghandle->lgh_hdr->llh_cat_idx;
|
|
out:
|
|
llog_handle_get(loghandle);
|
|
*res = loghandle;
|
|
return 0;
|
|
}
|
|
|
|
int llog_cat_close(const struct lu_env *env, struct llog_handle *cathandle)
|
|
{
|
|
struct llog_handle *loghandle, *n;
|
|
int rc;
|
|
|
|
list_for_each_entry_safe(loghandle, n, &cathandle->u.chd.chd_head,
|
|
u.phd.phd_entry) {
|
|
/* unlink open-not-created llogs */
|
|
list_del_init(&loghandle->u.phd.phd_entry);
|
|
llog_close(env, loghandle);
|
|
}
|
|
/* if handle was stored in ctxt, remove it too */
|
|
if (cathandle->lgh_ctxt->loc_handle == cathandle)
|
|
cathandle->lgh_ctxt->loc_handle = NULL;
|
|
rc = llog_close(env, cathandle);
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL(llog_cat_close);
|
|
|
|
static int llog_cat_process_cb(const struct lu_env *env,
|
|
struct llog_handle *cat_llh,
|
|
struct llog_rec_hdr *rec, void *data)
|
|
{
|
|
struct llog_process_data *d = data;
|
|
struct llog_logid_rec *lir = (struct llog_logid_rec *)rec;
|
|
struct llog_handle *llh;
|
|
int rc;
|
|
|
|
if (rec->lrh_type != LLOG_LOGID_MAGIC) {
|
|
CERROR("invalid record in catalog\n");
|
|
return -EINVAL;
|
|
}
|
|
CDEBUG(D_HA, "processing log "DOSTID":%x at index %u of catalog "
|
|
DOSTID"\n", POSTID(&lir->lid_id.lgl_oi), lir->lid_id.lgl_ogen,
|
|
rec->lrh_index, POSTID(&cat_llh->lgh_id.lgl_oi));
|
|
|
|
rc = llog_cat_id2handle(env, cat_llh, &llh, &lir->lid_id);
|
|
if (rc) {
|
|
CERROR("%s: cannot find handle for llog "DOSTID": %d\n",
|
|
cat_llh->lgh_ctxt->loc_obd->obd_name,
|
|
POSTID(&lir->lid_id.lgl_oi), rc);
|
|
return rc;
|
|
}
|
|
|
|
if (rec->lrh_index < d->lpd_startcat)
|
|
/* Skip processing of the logs until startcat */
|
|
rc = 0;
|
|
else if (d->lpd_startidx > 0) {
|
|
struct llog_process_cat_data cd;
|
|
|
|
cd.lpcd_first_idx = d->lpd_startidx;
|
|
cd.lpcd_last_idx = 0;
|
|
rc = llog_process_or_fork(env, llh, d->lpd_cb, d->lpd_data,
|
|
&cd, false);
|
|
/* Continue processing the next log from idx 0 */
|
|
d->lpd_startidx = 0;
|
|
} else {
|
|
rc = llog_process_or_fork(env, llh, d->lpd_cb, d->lpd_data,
|
|
NULL, false);
|
|
}
|
|
|
|
llog_handle_put(llh);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int llog_cat_process_or_fork(const struct lu_env *env,
|
|
struct llog_handle *cat_llh,
|
|
llog_cb_t cb, void *data, int startcat,
|
|
int startidx, bool fork)
|
|
{
|
|
struct llog_process_data d;
|
|
struct llog_log_hdr *llh = cat_llh->lgh_hdr;
|
|
int rc;
|
|
|
|
LASSERT(llh->llh_flags & LLOG_F_IS_CAT);
|
|
d.lpd_data = data;
|
|
d.lpd_cb = cb;
|
|
d.lpd_startcat = startcat;
|
|
d.lpd_startidx = startidx;
|
|
|
|
if (llh->llh_cat_idx > cat_llh->lgh_last_idx) {
|
|
struct llog_process_cat_data cd;
|
|
|
|
CWARN("catlog "DOSTID" crosses index zero\n",
|
|
POSTID(&cat_llh->lgh_id.lgl_oi));
|
|
|
|
cd.lpcd_first_idx = llh->llh_cat_idx;
|
|
cd.lpcd_last_idx = 0;
|
|
rc = llog_process_or_fork(env, cat_llh, llog_cat_process_cb,
|
|
&d, &cd, fork);
|
|
if (rc != 0)
|
|
return rc;
|
|
|
|
cd.lpcd_first_idx = 0;
|
|
cd.lpcd_last_idx = cat_llh->lgh_last_idx;
|
|
rc = llog_process_or_fork(env, cat_llh, llog_cat_process_cb,
|
|
&d, &cd, fork);
|
|
} else {
|
|
rc = llog_process_or_fork(env, cat_llh, llog_cat_process_cb,
|
|
&d, NULL, fork);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
int llog_cat_process(const struct lu_env *env, struct llog_handle *cat_llh,
|
|
llog_cb_t cb, void *data, int startcat, int startidx)
|
|
{
|
|
return llog_cat_process_or_fork(env, cat_llh, cb, data, startcat,
|
|
startidx, false);
|
|
}
|
|
EXPORT_SYMBOL(llog_cat_process);
|