| /* |
| * 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); |