-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
+/*
+ * GPL HEADER START
*
- * Copyright (C) 2001-2003 Cluster File Systems, Inc.
- * Author: Andreas Dilger <adilger@clusterfs.com>
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
- * This file is part of Lustre, http://www.lustre.org.
+ * 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.
*
- * Lustre is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License 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).
*
- * Lustre 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 for more details.
+ * 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
*
- * You should have received a copy of the GNU General Public License
- * along with Lustre; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * 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.
+ */
+/*
+ * 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>
*/
#define DEBUG_SUBSYSTEM S_LOG
-#ifndef EXPORT_SYMTAB
-#define EXPORT_SYMTAB
-#endif
-
-#ifdef __KERNEL__
-#include <linux/fs.h>
-#else
+#ifndef __KERNEL__
#include <liblustre.h>
#endif
-#include <linux/obd_class.h>
-#include <linux/lustre_log.h>
-#include <portals/list.h>
+#include <obd_class.h>
+#include <lustre_log.h>
+#include <libcfs/list.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.
{
struct llog_handle *loghandle;
struct llog_log_hdr *llh;
- struct llog_logid_rec rec;
- int rc, index, bitmap_size, i;
+ 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(ERR_PTR(-ENOSPC));
+ }
+
+ if (OBD_FAIL_CHECK(OBD_FAIL_MDS_LLOG_CREATE_FAILED))
+ RETURN(ERR_PTR(-ENOSPC));
+
rc = llog_create(cathandle->lgh_ctxt, &loghandle, NULL, NULL);
if (rc)
RETURN(ERR_PTR(rc));
- rc = llog_init_handle(loghandle,
- LLOG_F_IS_PLAIN | LLOG_F_ZAP_WHEN_EMPTY,
+ rc = llog_init_handle(loghandle,
+ LLOG_F_IS_PLAIN | LLOG_F_ZAP_WHEN_EMPTY,
&cathandle->lgh_hdr->llh_tgtuuid);
if (rc)
GOTO(out_destroy, rc);
- /* Find first free entry */
- llh = cathandle->lgh_hdr;
- bitmap_size = sizeof(llh->llh_bitmap) * 8;
- for (i = 0, index = le32_to_cpu(llh->llh_count); i < bitmap_size;
- i++, index++) {
- index %= bitmap_size;
- if (ext2_set_bit(index, llh->llh_bitmap)) {
- /* XXX This should trigger log clean up or similar */
- CERROR("catalog index %d is still in use\n", index);
- } else {
- cathandle->lgh_last_idx = index;
- llh->llh_count = cpu_to_le32(le32_to_cpu(llh->llh_count) + 1);
- break;
- }
- }
- if (i == bitmap_size) {
- CERROR("no free catalog slots for log...\n");
- GOTO(out_destroy, rc = -ENOSPC);
+ if (index == 0)
+ index = 1;
+ if (ext2_set_bit(index, llh->llh_bitmap)) {
+ CERROR("argh, index %u already set in log bitmap?\n",
+ index);
+ LBUG(); /* should never happen */
}
- CWARN("new recovery log "LPX64":%x for index %u of catalog "LPX64"\n",
- loghandle->lgh_id.lgl_oid, loghandle->lgh_id.lgl_ogen, index,
- cathandle->lgh_id.lgl_oid);
+ cathandle->lgh_last_idx = index;
+ llh->llh_count++;
+ llh->llh_tail.lrt_index = index;
+
+ CDEBUG(D_RPCTRACE,"new recovery log "LPX64":%x for index %u of catalog "
+ LPX64"\n", loghandle->lgh_id.lgl_oid, loghandle->lgh_id.lgl_ogen,
+ index, cathandle->lgh_id.lgl_oid);
/* build the record for this log in the catalog */
- rec.lid_hdr.lrh_len = cpu_to_le32(sizeof(rec));
- rec.lid_hdr.lrh_index = cpu_to_le32(index);
- rec.lid_hdr.lrh_type = cpu_to_le32(LLOG_LOGID_MAGIC);
+ 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 = cpu_to_le32(sizeof(rec));
- rec.lid_tail.lrt_index = cpu_to_le32(index);
+ rec.lid_tail.lrt_len = sizeof(rec);
+ rec.lid_tail.lrt_index = index;
/* update the catalog: header and record */
- rc = llog_write_rec(cathandle, &rec.lid_hdr,
+ rc = llog_write_rec(cathandle, &rec.lid_hdr,
&loghandle->u.phd.phd_cookie, 1, NULL, index);
if (rc < 0) {
GOTO(out_destroy, rc);
}
- loghandle->lgh_hdr->llh_cat_idx = cpu_to_le32(index);
+ loghandle->lgh_hdr->llh_cat_idx = index;
cathandle->u.chd.chd_current_log = loghandle;
- LASSERT(list_empty(&loghandle->u.phd.phd_entry));
- list_add_tail(&loghandle->u.phd.phd_entry, &cathandle->u.chd.chd_head);
+ LASSERT(cfs_list_empty(&loghandle->u.phd.phd_entry));
+ cfs_list_add_tail(&loghandle->u.phd.phd_entry,
+ &cathandle->u.chd.chd_head);
- out_destroy:
+out_destroy:
if (rc < 0)
llog_destroy(loghandle);
RETURN(loghandle);
}
-EXPORT_SYMBOL(llog_cat_new_log);
-/* Assumes caller has already pushed us into the kernel context and is locking.
+/* 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.
*/
int llog_cat_id2handle(struct llog_handle *cathandle, struct llog_handle **res,
if (cathandle == NULL)
RETURN(-EBADF);
- list_for_each_entry(loghandle, &cathandle->u.chd.chd_head,
- u.phd.phd_entry) {
+ cfs_list_for_each_entry(loghandle, &cathandle->u.chd.chd_head,
+ u.phd.phd_entry) {
struct llog_logid *cgl = &loghandle->lgh_id;
if (cgl->lgl_oid == logid->lgl_oid) {
if (cgl->lgl_ogen != logid->lgl_ogen) {
continue;
}
loghandle->u.phd.phd_cat_handle = cathandle;
- cathandle->u.chd.chd_current_log = loghandle;
GOTO(out, rc = 0);
}
}
} else {
rc = llog_init_handle(loghandle, LLOG_F_IS_PLAIN, NULL);
if (!rc) {
- list_add(&loghandle->u.phd.phd_entry,
- &cathandle->u.chd.chd_head);
- cathandle->u.chd.chd_current_log = loghandle;
+ cfs_list_add(&loghandle->u.phd.phd_entry,
+ &cathandle->u.chd.chd_head);
}
}
if (!rc) {
loghandle->u.phd.phd_cat_handle = cathandle;
loghandle->u.phd.phd_cookie.lgc_lgl = cathandle->lgh_id;
- loghandle->u.phd.phd_cookie.lgc_index =
- le32_to_cpu(loghandle->lgh_hdr->llh_cat_idx);
+ loghandle->u.phd.phd_cookie.lgc_index =
+ loghandle->lgh_hdr->llh_cat_idx;
}
out:
int rc;
ENTRY;
- list_for_each_entry_safe(loghandle, n, &cathandle->u.chd.chd_head,
- u.phd.phd_entry) {
+ cfs_list_for_each_entry_safe(loghandle, n, &cathandle->u.chd.chd_head,
+ u.phd.phd_entry) {
int err = llog_close(loghandle);
if (err)
CERROR("error closing loghandle\n");
}
EXPORT_SYMBOL(llog_cat_put);
-/* Return the currently active log handle. If the current log handle doesn't
+/**
+ * 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,
*
* NOTE: loghandle is write-locked upon successful return
*/
-static struct llog_handle *llog_cat_current_log(struct llog_handle *cathandle,
+static struct llog_handle *llog_cat_current_log(struct llog_handle *cathandle,
int create)
{
struct llog_handle *loghandle = NULL;
ENTRY;
- down_read(&cathandle->lgh_lock);
+ cfs_down_read_nested(&cathandle->lgh_lock, LLOGH_CAT);
loghandle = cathandle->u.chd.chd_current_log;
if (loghandle) {
struct llog_log_hdr *llh = loghandle->lgh_hdr;
- if (loghandle->lgh_last_idx < (sizeof(llh->llh_bitmap) * 8) - 1) {
- down_write(&loghandle->lgh_lock);
- up_read(&cathandle->lgh_lock);
+ cfs_down_write_nested(&loghandle->lgh_lock, LLOGH_LOG);
+ if (loghandle->lgh_last_idx < LLOG_BITMAP_SIZE(llh) - 1) {
+ cfs_up_read(&cathandle->lgh_lock);
RETURN(loghandle);
+ } else {
+ cfs_up_write(&loghandle->lgh_lock);
}
}
if (!create) {
if (loghandle)
- down_write(&loghandle->lgh_lock);
- up_read(&cathandle->lgh_lock);
+ cfs_down_write(&loghandle->lgh_lock);
+ cfs_up_read(&cathandle->lgh_lock);
RETURN(loghandle);
}
- up_read(&cathandle->lgh_lock);
+ cfs_up_read(&cathandle->lgh_lock);
/* time to create new log */
/* first, we have to make sure the state hasn't changed */
- down_write(&cathandle->lgh_lock);
+ cfs_down_write_nested(&cathandle->lgh_lock, LLOGH_CAT);
loghandle = cathandle->u.chd.chd_current_log;
if (loghandle) {
struct llog_log_hdr *llh = loghandle->lgh_hdr;
- if (loghandle->lgh_last_idx < (sizeof(llh->llh_bitmap) * 8) - 1) {
- down_write(&loghandle->lgh_lock);
- up_write(&cathandle->lgh_lock);
+ cfs_down_write_nested(&loghandle->lgh_lock, LLOGH_LOG);
+ if (loghandle->lgh_last_idx < LLOG_BITMAP_SIZE(llh) - 1) {
+ cfs_up_write(&cathandle->lgh_lock);
RETURN(loghandle);
+ } else {
+ cfs_up_write(&loghandle->lgh_lock);
}
}
CDEBUG(D_INODE, "creating new log\n");
loghandle = llog_cat_new_log(cathandle);
- if (loghandle)
- down_write(&loghandle->lgh_lock);
- up_write(&cathandle->lgh_lock);
+ if (!IS_ERR(loghandle))
+ cfs_down_write_nested(&loghandle->lgh_lock, LLOGH_LOG);
+ cfs_up_write(&cathandle->lgh_lock);
RETURN(loghandle);
}
* Assumes caller has already pushed us into the kernel context.
*/
int llog_cat_add_rec(struct llog_handle *cathandle, struct llog_rec_hdr *rec,
- struct llog_cookie *reccookie, void *buf)
+ struct llog_cookie *reccookie, void *buf)
{
struct llog_handle *loghandle;
int rc;
ENTRY;
- LASSERT(le32_to_cpu(rec->lrh_len) <= LLOG_CHUNK_SIZE);
+ LASSERT(rec->lrh_len <= LLOG_CHUNK_SIZE);
loghandle = llog_cat_current_log(cathandle, 1);
if (IS_ERR(loghandle))
RETURN(PTR_ERR(loghandle));
/* loghandle is already locked by llog_cat_current_log() for us */
rc = llog_write_rec(loghandle, rec, reccookie, 1, buf, -1);
- up_write(&loghandle->lgh_lock);
+ if (rc < 0)
+ CERROR("llog_write_rec %d: lh=%p\n", rc, loghandle);
+ cfs_up_write(&loghandle->lgh_lock);
+ if (rc == -ENOSPC) {
+ /* to create a new plain log */
+ loghandle = llog_cat_current_log(cathandle, 1);
+ if (IS_ERR(loghandle))
+ RETURN(PTR_ERR(loghandle));
+ rc = llog_write_rec(loghandle, rec, reccookie, 1, buf, -1);
+ cfs_up_write(&loghandle->lgh_lock);
+ }
+
RETURN(rc);
}
EXPORT_SYMBOL(llog_cat_add_rec);
* Assumes caller has already pushed us into the kernel context.
*/
int llog_cat_cancel_records(struct llog_handle *cathandle, int count,
- struct llog_cookie *cookies)
+ struct llog_cookie *cookies)
{
int i, index, rc = 0;
ENTRY;
- down_write(&cathandle->lgh_lock);
+ cfs_down_write_nested(&cathandle->lgh_lock, LLOGH_CAT);
for (i = 0; i < count; i++, cookies++) {
struct llog_handle *loghandle;
struct llog_logid *lgl = &cookies->lgc_lgl;
break;
}
- down_write(&loghandle->lgh_lock);
+ cfs_down_write_nested(&loghandle->lgh_lock, LLOGH_LOG);
rc = llog_cancel_rec(loghandle, cookies->lgc_index);
- up_write(&loghandle->lgh_lock);
-
+ cfs_up_write(&loghandle->lgh_lock);
+
if (rc == 1) { /* log has been destroyed */
index = loghandle->u.phd.phd_cookie.lgc_index;
if (cathandle->u.chd.chd_current_log == loghandle)
cathandle->u.chd.chd_current_log = NULL;
llog_free_handle(loghandle);
-
+
LASSERT(index);
+ llog_cat_set_first_idx(cathandle, index);
rc = llog_cancel_rec(cathandle, index);
+ if (rc == 0)
+ CDEBUG(D_RPCTRACE,"cancel plain log at index %u"
+ " of catalog "LPX64"\n",
+ index, cathandle->lgh_id.lgl_oid);
}
}
- up_write(&cathandle->lgh_lock);
+ cfs_up_write(&cathandle->lgh_lock);
RETURN(rc);
}
EXPORT_SYMBOL(llog_cat_cancel_records);
-int llog_cat_process_cb(struct llog_handle *cat_llh, struct llog_rec_hdr *rec, void *data)
+int llog_cat_process_cb(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) {
+ ENTRY;
+ if (rec->lrh_type != LLOG_LOGID_MAGIC) {
CERROR("invalid record in catalog\n");
RETURN(-EINVAL);
}
- CWARN("processing log "LPX64":%x at index %u of catalog "LPX64"\n",
- lir->lid_id.lgl_oid, lir->lid_id.lgl_ogen,
- le32_to_cpu(rec->lrh_index), cat_llh->lgh_id.lgl_oid);
+ CDEBUG(D_HA, "processing log "LPX64":%x at index %u of catalog "
+ LPX64"\n", lir->lid_id.lgl_oid, lir->lid_id.lgl_ogen,
+ rec->lrh_index, cat_llh->lgh_id.lgl_oid);
rc = llog_cat_id2handle(cat_llh, &llh, &lir->lid_id);
if (rc) {
- CERROR("Cannot find handle for log "LPX64"\n", lir->lid_id.lgl_oid);
+ CERROR("Cannot find handle for log "LPX64"\n",
+ lir->lid_id.lgl_oid);
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_flags(llh, d->lpd_cb, d->lpd_data, &cd,
+ d->lpd_flags);
+ /* Continue processing the next log from idx 0 */
+ d->lpd_startidx = 0;
+ } else {
+ rc = llog_process_flags(llh, d->lpd_cb, d->lpd_data, NULL,
+ d->lpd_flags);
+ }
- rc = llog_process(llh, d->lpd_cb, d->lpd_data);
RETURN(rc);
}
-int llog_cat_process(struct llog_handle *cat_llh, llog_cb_t cb, void *data)
+int llog_cat_process_flags(struct llog_handle *cat_llh, llog_cb_t cb,
+ void *data, int flags, int startcat, int startidx)
{
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;
+ d.lpd_flags = flags;
+
+ if (llh->llh_cat_idx > cat_llh->lgh_last_idx) {
+ struct llog_process_cat_data cd;
+
+ CWARN("catlog "LPX64" crosses index zero\n",
+ cat_llh->lgh_id.lgl_oid);
+
+ cd.lpcd_first_idx = llh->llh_cat_idx;
+ cd.lpcd_last_idx = 0;
+ rc = llog_process_flags(cat_llh, llog_cat_process_cb, &d, &cd,
+ flags);
+ if (rc != 0)
+ RETURN(rc);
+
+ cd.lpcd_first_idx = 0;
+ cd.lpcd_last_idx = cat_llh->lgh_last_idx;
+ rc = llog_process_flags(cat_llh, llog_cat_process_cb, &d, &cd,
+ flags);
+ } else {
+ rc = llog_process_flags(cat_llh, llog_cat_process_cb, &d, NULL,
+ flags);
+ }
- rc = llog_process(cat_llh, llog_cat_process_cb, &d);
RETURN(rc);
}
-EXPORT_SYMBOL(llog_cat_process);
+EXPORT_SYMBOL(llog_cat_process_flags);
+int llog_cat_process(struct llog_handle *cat_llh, llog_cb_t cb, void *data,
+ int startcat, int startidx)
+{
+ return llog_cat_process_flags(cat_llh, cb, data, 0, startcat, startidx);
+}
+EXPORT_SYMBOL(llog_cat_process);
-#if 0
-/* Assumes caller has already pushed us into the kernel context. */
-int llog_cat_init(struct llog_handle *cathandle, struct obd_uuid *tgtuuid)
+#ifdef __KERNEL__
+int llog_cat_process_thread(void *data)
{
- struct llog_log_hdr *llh;
- loff_t offset = 0;
- int rc = 0;
+ struct llog_process_cat_args *args = data;
+ struct llog_ctxt *ctxt = args->lpca_ctxt;
+ struct llog_handle *llh = NULL;
+ llog_cb_t cb = args->lpca_cb;
+ struct llog_logid logid;
+ int rc;
ENTRY;
- LASSERT(sizeof(*llh) == LLOG_CHUNK_SIZE);
+ cfs_daemonize_ctxt("ll_log_process");
- down(&cathandle->lgh_lock);
- llh = cathandle->lgh_hdr;
+ logid = *(struct llog_logid *)(args->lpca_arg);
+ rc = llog_create(ctxt, &llh, &logid, NULL);
+ if (rc) {
+ CERROR("llog_create() failed %d\n", rc);
+ GOTO(out, rc);
+ }
+ rc = llog_init_handle(llh, LLOG_F_IS_CAT, NULL);
+ if (rc) {
+ CERROR("llog_init_handle failed %d\n", rc);
+ GOTO(release_llh, rc);
+ }
+
+ if (cb) {
+ rc = llog_cat_process(llh, cb, NULL, 0, 0);
+ if (rc != LLOG_PROC_BREAK && rc != 0)
+ CERROR("llog_cat_process() failed %d\n", rc);
+ cb(llh, NULL, NULL);
+ } else {
+ CWARN("No callback function for recovery\n");
+ }
+
+ /*
+ * Make sure that all cached data is sent.
+ */
+ llog_sync(ctxt, NULL, 0);
+ GOTO(release_llh, rc);
+release_llh:
+ rc = llog_cat_put(llh);
+ if (rc)
+ CERROR("llog_cat_put() failed %d\n", rc);
+out:
+ llog_ctxt_put(ctxt);
+ OBD_FREE_PTR(args);
+ return rc;
+}
+EXPORT_SYMBOL(llog_cat_process_thread);
+#endif
+
+static int llog_cat_reverse_process_cb(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 "LPX64":%x at index %u of catalog "
+ LPX64"\n", lir->lid_id.lgl_oid, lir->lid_id.lgl_ogen,
+ le32_to_cpu(rec->lrh_index), cat_llh->lgh_id.lgl_oid);
- if (cathandle->lgh_file->f_dentry->d_inode->i_size == 0) {
- llog_write_rec(cathandle, &llh->llh_hdr, NULL, 0, NULL, 0);
-
-write_hdr:
- rc = lustre_fwrite(cathandle->lgh_file, llh, LLOG_CHUNK_SIZE,
- &offset);
- if (rc != LLOG_CHUNK_SIZE) {
- CERROR("error writing catalog header: rc %d\n", rc);
- OBD_FREE(llh, sizeof(*llh));
- if (rc >= 0)
- rc = -ENOSPC;
- } else
- rc = 0;
+ rc = llog_cat_id2handle(cat_llh, &llh, &lir->lid_id);
+ if (rc) {
+ CERROR("Cannot find handle for log "LPX64"\n",
+ lir->lid_id.lgl_oid);
+ RETURN(rc);
+ }
+
+ rc = llog_reverse_process(llh, d->lpd_cb, d->lpd_data, NULL);
+ RETURN(rc);
+}
+
+int llog_cat_reverse_process(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 "LPX64" crosses index zero\n",
+ cat_llh->lgh_id.lgl_oid);
+
+ cd.lpcd_first_idx = 0;
+ cd.lpcd_last_idx = cat_llh->lgh_last_idx;
+ rc = llog_reverse_process(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(cat_llh, llog_cat_reverse_process_cb,
+ &d, &cd);
} else {
- rc = lustre_fread(cathandle->lgh_file, llh, LLOG_CHUNK_SIZE,
- &offset);
- if (rc != LLOG_CHUNK_SIZE) {
- CERROR("error reading catalog header: rc %d\n", rc);
- /* Can we do much else if the header is bad? */
- goto write_hdr;
- } else
- rc = 0;
+ rc = llog_reverse_process(cat_llh, llog_cat_reverse_process_cb,
+ &d, NULL);
}
- cathandle->lgh_tgtuuid = &llh->llh_tgtuuid;
- up(&cathandle->lgh_lock);
RETURN(rc);
}
-EXPORT_SYMBOL(llog_cat_init);
+EXPORT_SYMBOL(llog_cat_reverse_process);
-#endif
+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 "LPX64" first idx %u\n",
+ cathandle->lgh_id.lgl_oid, llh->llh_cat_idx);
+ }
+
+ RETURN(0);
+}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff