| /* |
| * 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, 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" |
| |
| /* Create a new 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. |
| */ |
| static int llog_cat_new_log(const struct lu_env *env, |
| struct llog_handle *cathandle, |
| struct llog_handle *loghandle, |
| struct thandle *th) |
| { |
| |
| struct llog_log_hdr *llh; |
| struct llog_logid_rec rec = { { 0 }, }; |
| int rc, index, bitmap_size; |
| |
| llh = cathandle->lgh_hdr; |
| bitmap_size = LLOG_BITMAP_SIZE(llh); |
| |
| index = (cathandle->lgh_last_idx + 1) % bitmap_size; |
| |
| /* maximum number of available slots in catlog is bitmap_size - 2 */ |
| if (llh->llh_cat_idx == index) { |
| CERROR("no free catalog slots for log...\n"); |
| return -ENOSPC; |
| } |
| |
| if (OBD_FAIL_CHECK(OBD_FAIL_MDS_LLOG_CREATE_FAILED)) |
| return -ENOSPC; |
| |
| rc = llog_create(env, loghandle, th); |
| /* if llog is already created, no need to initialize it */ |
| if (rc == -EEXIST) { |
| return 0; |
| } else if (rc != 0) { |
| CERROR("%s: can't create new plain llog in catalog: rc = %d\n", |
| loghandle->lgh_ctxt->loc_obd->obd_name, rc); |
| return rc; |
| } |
| |
| rc = llog_init_handle(env, loghandle, |
| LLOG_F_IS_PLAIN | LLOG_F_ZAP_WHEN_EMPTY, |
| &cathandle->lgh_hdr->llh_tgtuuid); |
| if (rc) |
| goto out_destroy; |
| |
| if (index == 0) |
| index = 1; |
| |
| spin_lock(&loghandle->lgh_hdr_lock); |
| llh->llh_count++; |
| if (ext2_set_bit(index, llh->llh_bitmap)) { |
| CERROR("argh, index %u already set in log bitmap?\n", |
| index); |
| spin_unlock(&loghandle->lgh_hdr_lock); |
| LBUG(); /* should never happen */ |
| } |
| spin_unlock(&loghandle->lgh_hdr_lock); |
| |
| cathandle->lgh_last_idx = index; |
| llh->llh_tail.lrt_index = index; |
| |
| CDEBUG(D_RPCTRACE, |
| "new recovery log "DOSTID":%x for index %u of catalog" |
| DOSTID"\n", POSTID(&loghandle->lgh_id.lgl_oi), |
| loghandle->lgh_id.lgl_ogen, index, |
| POSTID(&cathandle->lgh_id.lgl_oi)); |
| /* build the record for this log in the catalog */ |
| rec.lid_hdr.lrh_len = sizeof(rec); |
| rec.lid_hdr.lrh_index = index; |
| rec.lid_hdr.lrh_type = LLOG_LOGID_MAGIC; |
| rec.lid_id = loghandle->lgh_id; |
| rec.lid_tail.lrt_len = sizeof(rec); |
| rec.lid_tail.lrt_index = index; |
| |
| /* update the catalog: header and record */ |
| rc = llog_write_rec(env, cathandle, &rec.lid_hdr, |
| &loghandle->u.phd.phd_cookie, 1, NULL, index, th); |
| if (rc < 0) |
| goto out_destroy; |
| |
| loghandle->lgh_hdr->llh_cat_idx = index; |
| return 0; |
| out_destroy: |
| llog_destroy(env, loghandle); |
| return rc; |
| } |
| |
| /* 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() |
| */ |
| 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 == NULL) |
| 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) { |
| struct llog_log_hdr *llh = loghandle->lgh_hdr; |
| int index; |
| |
| /* unlink open-not-created llogs */ |
| list_del_init(&loghandle->u.phd.phd_entry); |
| llh = loghandle->lgh_hdr; |
| if (loghandle->lgh_obj != NULL && llh != NULL && |
| (llh->llh_flags & LLOG_F_ZAP_WHEN_EMPTY) && |
| (llh->llh_count == 1)) { |
| rc = llog_destroy(env, loghandle); |
| if (rc) |
| CERROR("%s: failure destroying log during cleanup: rc = %d\n", |
| loghandle->lgh_ctxt->loc_obd->obd_name, |
| rc); |
| |
| index = loghandle->u.phd.phd_cookie.lgc_index; |
| llog_cat_cleanup(env, cathandle, NULL, index); |
| } |
| 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); |
| |
| /** |
| * lockdep markers for nested struct llog_handle::lgh_lock locking. |
| */ |
| enum { |
| LLOGH_CAT, |
| LLOGH_LOG |
| }; |
| |
| /** Return the currently active log handle. If the current log handle doesn't |
| * have enough space left for the current record, start a new one. |
| * |
| * If reclen is 0, we only want to know what the currently active log is, |
| * otherwise we get a lock on this log so nobody can steal our space. |
| * |
| * Assumes caller has already pushed us into the kernel context and is locking. |
| * |
| * NOTE: loghandle is write-locked upon successful return |
| */ |
| static struct llog_handle *llog_cat_current_log(struct llog_handle *cathandle, |
| struct thandle *th) |
| { |
| struct llog_handle *loghandle = NULL; |
| |
| down_read_nested(&cathandle->lgh_lock, LLOGH_CAT); |
| loghandle = cathandle->u.chd.chd_current_log; |
| if (loghandle) { |
| struct llog_log_hdr *llh; |
| |
| down_write_nested(&loghandle->lgh_lock, LLOGH_LOG); |
| llh = loghandle->lgh_hdr; |
| if (llh == NULL || |
| loghandle->lgh_last_idx < LLOG_BITMAP_SIZE(llh) - 1) { |
| up_read(&cathandle->lgh_lock); |
| return loghandle; |
| } else { |
| up_write(&loghandle->lgh_lock); |
| } |
| } |
| up_read(&cathandle->lgh_lock); |
| |
| /* time to use next log */ |
| |
| /* first, we have to make sure the state hasn't changed */ |
| down_write_nested(&cathandle->lgh_lock, LLOGH_CAT); |
| loghandle = cathandle->u.chd.chd_current_log; |
| if (loghandle) { |
| struct llog_log_hdr *llh; |
| |
| down_write_nested(&loghandle->lgh_lock, LLOGH_LOG); |
| llh = loghandle->lgh_hdr; |
| LASSERT(llh); |
| if (loghandle->lgh_last_idx < LLOG_BITMAP_SIZE(llh) - 1) { |
| up_write(&cathandle->lgh_lock); |
| return loghandle; |
| } else { |
| up_write(&loghandle->lgh_lock); |
| } |
| } |
| |
| CDEBUG(D_INODE, "use next log\n"); |
| |
| loghandle = cathandle->u.chd.chd_next_log; |
| cathandle->u.chd.chd_current_log = loghandle; |
| cathandle->u.chd.chd_next_log = NULL; |
| down_write_nested(&loghandle->lgh_lock, LLOGH_LOG); |
| up_write(&cathandle->lgh_lock); |
| LASSERT(loghandle); |
| return loghandle; |
| } |
| |
| /* Add a single record to the recovery log(s) using a catalog |
| * Returns as llog_write_record |
| * |
| * Assumes caller has already pushed us into the kernel context. |
| */ |
| int llog_cat_add_rec(const struct lu_env *env, struct llog_handle *cathandle, |
| struct llog_rec_hdr *rec, struct llog_cookie *reccookie, |
| void *buf, struct thandle *th) |
| { |
| struct llog_handle *loghandle; |
| int rc; |
| |
| LASSERT(rec->lrh_len <= LLOG_CHUNK_SIZE); |
| loghandle = llog_cat_current_log(cathandle, th); |
| LASSERT(!IS_ERR(loghandle)); |
| |
| /* loghandle is already locked by llog_cat_current_log() for us */ |
| if (!llog_exist(loghandle)) { |
| rc = llog_cat_new_log(env, cathandle, loghandle, th); |
| if (rc < 0) { |
| up_write(&loghandle->lgh_lock); |
| return rc; |
| } |
| } |
| /* now let's try to add the record */ |
| rc = llog_write_rec(env, loghandle, rec, reccookie, 1, buf, -1, th); |
| if (rc < 0) |
| CDEBUG_LIMIT(rc == -ENOSPC ? D_HA : D_ERROR, |
| "llog_write_rec %d: lh=%p\n", rc, loghandle); |
| up_write(&loghandle->lgh_lock); |
| if (rc == -ENOSPC) { |
| /* try to use next log */ |
| loghandle = llog_cat_current_log(cathandle, th); |
| LASSERT(!IS_ERR(loghandle)); |
| /* new llog can be created concurrently */ |
| if (!llog_exist(loghandle)) { |
| rc = llog_cat_new_log(env, cathandle, loghandle, th); |
| if (rc < 0) { |
| up_write(&loghandle->lgh_lock); |
| return rc; |
| } |
| } |
| /* now let's try to add the record */ |
| rc = llog_write_rec(env, loghandle, rec, reccookie, 1, buf, |
| -1, th); |
| if (rc < 0) |
| CERROR("llog_write_rec %d: lh=%p\n", rc, loghandle); |
| up_write(&loghandle->lgh_lock); |
| } |
| |
| return rc; |
| } |
| EXPORT_SYMBOL(llog_cat_add_rec); |
| |
| int llog_cat_declare_add_rec(const struct lu_env *env, |
| struct llog_handle *cathandle, |
| struct llog_rec_hdr *rec, struct thandle *th) |
| { |
| struct llog_handle *loghandle, *next; |
| int rc = 0; |
| |
| if (cathandle->u.chd.chd_current_log == NULL) { |
| /* declare new plain llog */ |
| down_write(&cathandle->lgh_lock); |
| if (cathandle->u.chd.chd_current_log == NULL) { |
| rc = llog_open(env, cathandle->lgh_ctxt, &loghandle, |
| NULL, NULL, LLOG_OPEN_NEW); |
| if (rc == 0) { |
| cathandle->u.chd.chd_current_log = loghandle; |
| list_add_tail(&loghandle->u.phd.phd_entry, |
| &cathandle->u.chd.chd_head); |
| } |
| } |
| up_write(&cathandle->lgh_lock); |
| } else if (cathandle->u.chd.chd_next_log == NULL) { |
| /* declare next plain llog */ |
| down_write(&cathandle->lgh_lock); |
| if (cathandle->u.chd.chd_next_log == NULL) { |
| rc = llog_open(env, cathandle->lgh_ctxt, &loghandle, |
| NULL, NULL, LLOG_OPEN_NEW); |
| if (rc == 0) { |
| cathandle->u.chd.chd_next_log = loghandle; |
| list_add_tail(&loghandle->u.phd.phd_entry, |
| &cathandle->u.chd.chd_head); |
| } |
| } |
| up_write(&cathandle->lgh_lock); |
| } |
| if (rc) |
| goto out; |
| |
| if (!llog_exist(cathandle->u.chd.chd_current_log)) { |
| rc = llog_declare_create(env, cathandle->u.chd.chd_current_log, |
| th); |
| if (rc) |
| goto out; |
| llog_declare_write_rec(env, cathandle, NULL, -1, th); |
| } |
| /* declare records in the llogs */ |
| rc = llog_declare_write_rec(env, cathandle->u.chd.chd_current_log, |
| rec, -1, th); |
| if (rc) |
| goto out; |
| |
| next = cathandle->u.chd.chd_next_log; |
| if (next) { |
| if (!llog_exist(next)) { |
| rc = llog_declare_create(env, next, th); |
| llog_declare_write_rec(env, cathandle, NULL, -1, th); |
| } |
| llog_declare_write_rec(env, next, rec, -1, th); |
| } |
| out: |
| return rc; |
| } |
| EXPORT_SYMBOL(llog_cat_declare_add_rec); |
| |
| int llog_cat_add(const struct lu_env *env, struct llog_handle *cathandle, |
| struct llog_rec_hdr *rec, struct llog_cookie *reccookie, |
| void *buf) |
| { |
| struct llog_ctxt *ctxt; |
| struct dt_device *dt; |
| struct thandle *th = NULL; |
| int rc; |
| |
| ctxt = cathandle->lgh_ctxt; |
| LASSERT(ctxt); |
| LASSERT(ctxt->loc_exp); |
| |
| if (cathandle->lgh_obj != NULL) { |
| dt = ctxt->loc_exp->exp_obd->obd_lvfs_ctxt.dt; |
| LASSERT(dt); |
| |
| th = dt_trans_create(env, dt); |
| if (IS_ERR(th)) |
| return PTR_ERR(th); |
| |
| rc = llog_cat_declare_add_rec(env, cathandle, rec, th); |
| if (rc) |
| goto out_trans; |
| |
| rc = dt_trans_start_local(env, dt, th); |
| if (rc) |
| goto out_trans; |
| rc = llog_cat_add_rec(env, cathandle, rec, reccookie, buf, th); |
| out_trans: |
| dt_trans_stop(env, dt, th); |
| } else { /* lvfs compat code */ |
| LASSERT(cathandle->lgh_file != NULL); |
| rc = llog_cat_declare_add_rec(env, cathandle, rec, th); |
| if (rc == 0) |
| rc = llog_cat_add_rec(env, cathandle, rec, reccookie, |
| buf, th); |
| } |
| return rc; |
| } |
| EXPORT_SYMBOL(llog_cat_add); |
| |
| /* For each cookie in the cookie array, we clear the log in-use bit and either: |
| * - the log is empty, so mark it free in the catalog header and delete it |
| * - the log is not empty, just write out the log header |
| * |
| * The cookies may be in different log files, so we need to get new logs |
| * each time. |
| * |
| * Assumes caller has already pushed us into the kernel context. |
| */ |
| int llog_cat_cancel_records(const struct lu_env *env, |
| struct llog_handle *cathandle, int count, |
| struct llog_cookie *cookies) |
| { |
| int i, index, rc = 0, failed = 0; |
| |
| for (i = 0; i < count; i++, cookies++) { |
| struct llog_handle *loghandle; |
| struct llog_logid *lgl = &cookies->lgc_lgl; |
| int lrc; |
| |
| rc = llog_cat_id2handle(env, cathandle, &loghandle, lgl); |
| if (rc) { |
| CERROR("%s: cannot find handle for llog "DOSTID": %d\n", |
| cathandle->lgh_ctxt->loc_obd->obd_name, |
| POSTID(&lgl->lgl_oi), rc); |
| failed++; |
| continue; |
| } |
| |
| lrc = llog_cancel_rec(env, loghandle, cookies->lgc_index); |
| if (lrc == 1) { /* log has been destroyed */ |
| index = loghandle->u.phd.phd_cookie.lgc_index; |
| rc = llog_cat_cleanup(env, cathandle, loghandle, |
| index); |
| } else if (lrc == -ENOENT) { |
| if (rc == 0) /* ENOENT shouldn't rewrite any error */ |
| rc = lrc; |
| } else if (lrc < 0) { |
| failed++; |
| rc = lrc; |
| } |
| llog_handle_put(loghandle); |
| } |
| if (rc) |
| CERROR("%s: fail to cancel %d of %d llog-records: rc = %d\n", |
| cathandle->lgh_ctxt->loc_obd->obd_name, failed, count, |
| rc); |
| |
| return rc; |
| } |
| EXPORT_SYMBOL(llog_cat_cancel_records); |
| |
| 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; |
| } |
| |
| 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; |
| } |
| EXPORT_SYMBOL(llog_cat_process_or_fork); |
| |
| 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); |
| |
| static int llog_cat_reverse_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 (le32_to_cpu(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, |
| le32_to_cpu(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; |
| } |
| |
| rc = llog_reverse_process(env, llh, d->lpd_cb, d->lpd_data, NULL); |
| llog_handle_put(llh); |
| return rc; |
| } |
| |
| int llog_cat_reverse_process(const struct lu_env *env, |
| struct llog_handle *cat_llh, |
| llog_cb_t cb, void *data) |
| { |
| struct llog_process_data d; |
| struct llog_process_cat_data cd; |
| 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; |
| |
| if (llh->llh_cat_idx > cat_llh->lgh_last_idx) { |
| CWARN("catalog "DOSTID" crosses index zero\n", |
| POSTID(&cat_llh->lgh_id.lgl_oi)); |
| |
| cd.lpcd_first_idx = 0; |
| cd.lpcd_last_idx = cat_llh->lgh_last_idx; |
| rc = llog_reverse_process(env, cat_llh, |
| llog_cat_reverse_process_cb, |
| &d, &cd); |
| if (rc != 0) |
| return rc; |
| |
| cd.lpcd_first_idx = le32_to_cpu(llh->llh_cat_idx); |
| cd.lpcd_last_idx = 0; |
| rc = llog_reverse_process(env, cat_llh, |
| llog_cat_reverse_process_cb, |
| &d, &cd); |
| } else { |
| rc = llog_reverse_process(env, cat_llh, |
| llog_cat_reverse_process_cb, |
| &d, NULL); |
| } |
| |
| return rc; |
| } |
| EXPORT_SYMBOL(llog_cat_reverse_process); |
| |
| static int llog_cat_set_first_idx(struct llog_handle *cathandle, int index) |
| { |
| struct llog_log_hdr *llh = cathandle->lgh_hdr; |
| int i, bitmap_size, idx; |
| |
| bitmap_size = LLOG_BITMAP_SIZE(llh); |
| if (llh->llh_cat_idx == (index - 1)) { |
| idx = llh->llh_cat_idx + 1; |
| llh->llh_cat_idx = idx; |
| if (idx == cathandle->lgh_last_idx) |
| goto out; |
| for (i = (index + 1) % bitmap_size; |
| i != cathandle->lgh_last_idx; |
| i = (i + 1) % bitmap_size) { |
| if (!ext2_test_bit(i, llh->llh_bitmap)) { |
| idx = llh->llh_cat_idx + 1; |
| llh->llh_cat_idx = idx; |
| } else if (i == 0) { |
| llh->llh_cat_idx = 0; |
| } else { |
| break; |
| } |
| } |
| out: |
| CDEBUG(D_RPCTRACE, "set catlog "DOSTID" first idx %u\n", |
| POSTID(&cathandle->lgh_id.lgl_oi), llh->llh_cat_idx); |
| } |
| |
| return 0; |
| } |
| |
| /* Cleanup deleted plain llog traces from catalog */ |
| int llog_cat_cleanup(const struct lu_env *env, struct llog_handle *cathandle, |
| struct llog_handle *loghandle, int index) |
| { |
| int rc; |
| |
| LASSERT(index); |
| if (loghandle != NULL) { |
| /* remove destroyed llog from catalog list and |
| * chd_current_log variable */ |
| down_write(&cathandle->lgh_lock); |
| if (cathandle->u.chd.chd_current_log == loghandle) |
| cathandle->u.chd.chd_current_log = NULL; |
| list_del_init(&loghandle->u.phd.phd_entry); |
| up_write(&cathandle->lgh_lock); |
| LASSERT(index == loghandle->u.phd.phd_cookie.lgc_index); |
| /* llog was opened and keep in a list, close it now */ |
| llog_close(env, loghandle); |
| } |
| /* remove plain llog entry from catalog by index */ |
| llog_cat_set_first_idx(cathandle, index); |
| rc = llog_cancel_rec(env, cathandle, index); |
| if (rc == 0) |
| CDEBUG(D_HA, "cancel plain log at index %u of catalog " DOSTID "\n", |
| index, POSTID(&cathandle->lgh_id.lgl_oi)); |
| return rc; |
| } |
| |
| static int cat_cancel_cb(const struct lu_env *env, struct llog_handle *cathandle, |
| struct llog_rec_hdr *rec, void *data) |
| { |
| struct llog_logid_rec *lir = (struct llog_logid_rec *)rec; |
| struct llog_handle *loghandle; |
| struct llog_log_hdr *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(&cathandle->lgh_id.lgl_oi)); |
| |
| rc = llog_cat_id2handle(env, cathandle, &loghandle, &lir->lid_id); |
| if (rc) { |
| CERROR("%s: cannot find handle for llog "DOSTID": %d\n", |
| cathandle->lgh_ctxt->loc_obd->obd_name, |
| POSTID(&lir->lid_id.lgl_oi), rc); |
| if (rc == -ENOENT || rc == -ESTALE) { |
| /* remove index from catalog */ |
| llog_cat_cleanup(env, cathandle, NULL, rec->lrh_index); |
| } |
| return rc; |
| } |
| |
| llh = loghandle->lgh_hdr; |
| if ((llh->llh_flags & LLOG_F_ZAP_WHEN_EMPTY) && |
| (llh->llh_count == 1)) { |
| rc = llog_destroy(env, loghandle); |
| if (rc) |
| CERROR("%s: fail to destroy empty log: rc = %d\n", |
| loghandle->lgh_ctxt->loc_obd->obd_name, rc); |
| |
| llog_cat_cleanup(env, cathandle, loghandle, |
| loghandle->u.phd.phd_cookie.lgc_index); |
| } |
| llog_handle_put(loghandle); |
| |
| return rc; |
| } |
| |
| /* helper to initialize catalog llog and process it to cancel */ |
| int llog_cat_init_and_process(const struct lu_env *env, |
| struct llog_handle *llh) |
| { |
| int rc; |
| |
| rc = llog_init_handle(env, llh, LLOG_F_IS_CAT, NULL); |
| if (rc) |
| return rc; |
| |
| rc = llog_process_or_fork(env, llh, cat_cancel_cb, NULL, NULL, false); |
| if (rc) |
| CERROR("%s: llog_process() with cat_cancel_cb failed: rc = %d\n", |
| llh->lgh_ctxt->loc_obd->obd_name, rc); |
| return 0; |
| } |
| EXPORT_SYMBOL(llog_cat_init_and_process); |