diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/obdclass/llog_cat.c')
| -rw-r--r-- | drivers/staging/lustre/lustre/obdclass/llog_cat.c | 833 |
1 files changed, 833 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/obdclass/llog_cat.c b/drivers/staging/lustre/lustre/obdclass/llog_cat.c new file mode 100644 index 000000000000..cf00b2f550ac --- /dev/null +++ b/drivers/staging/lustre/lustre/obdclass/llog_cat.c @@ -0,0 +1,833 @@ +/* + * 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 <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; + ENTRY; + + 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, rc); + + 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, rc); + + 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; + + ENTRY; + + 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); + GOTO(out, rc = 0); + } + } + 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; + EXIT; +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; + + ENTRY; + + 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; + ENTRY; + + 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; + ENTRY; + + 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; + + ENTRY; + + 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, rc); + + 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, rc); + 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, rc); + + 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); + + rc = dt_trans_start_local(env, dt, th); + if (rc) + GOTO(out_trans, rc); + 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; + + ENTRY; + + 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); + +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; + + ENTRY; + 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 */ + RETURN(0); + + 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; + ENTRY; + + 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; + ENTRY; + + 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); + +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; + ENTRY; + + 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; +} + +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; + + ENTRY; + + 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); +} +EXPORT_SYMBOL(cat_cancel_cb); + +/* 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); |