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* 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);
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);
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;
}
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;
}
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);
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