[PATCH 10/12] staging/lustre/obdclass: remove llog_osd.c

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From: "John L. Hammond" <john.hammond@xxxxxxxxx>

llog_osd_ops is not used so remove it and its supporting methods.

Signed-off-by: John L. Hammond <john.hammond@xxxxxxxxx>
---
 drivers/staging/lustre/lustre/include/lustre_log.h |    9 -
 drivers/staging/lustre/lustre/obdclass/Makefile    |    2 +-
 drivers/staging/lustre/lustre/obdclass/llog_osd.c  | 1290 --------------------
 3 files changed, 1 insertion(+), 1300 deletions(-)
 delete mode 100644 drivers/staging/lustre/lustre/obdclass/llog_osd.c

diff --git a/drivers/staging/lustre/lustre/include/lustre_log.h b/drivers/staging/lustre/lustre/include/lustre_log.h
index 3944c6d..ed97887 100644
--- a/drivers/staging/lustre/lustre/include/lustre_log.h
+++ b/drivers/staging/lustre/lustre/include/lustre_log.h
@@ -313,15 +313,6 @@ struct llog_handle {
 	atomic_t		 lgh_refcount;
 };
 
-/* llog_osd.c */
-extern struct llog_operations llog_osd_ops;
-int llog_osd_get_cat_list(const struct lu_env *env, struct dt_device *d,
-			  int idx, int count,
-			  struct llog_catid *idarray);
-int llog_osd_put_cat_list(const struct lu_env *env, struct dt_device *d,
-			  int idx, int count,
-			  struct llog_catid *idarray);
-
 #define LLOG_CTXT_FLAG_UNINITIALIZED     0x00000001
 #define LLOG_CTXT_FLAG_STOP		 0x00000002
 
diff --git a/drivers/staging/lustre/lustre/obdclass/Makefile b/drivers/staging/lustre/lustre/obdclass/Makefile
index 9a2b83f..c8c95e1 100644
--- a/drivers/staging/lustre/lustre/obdclass/Makefile
+++ b/drivers/staging/lustre/lustre/obdclass/Makefile
@@ -3,7 +3,7 @@ obj-$(CONFIG_LUSTRE_FS) += obdclass.o
 obdclass-y := linux/linux-module.o linux/linux-obdo.o linux/linux-sysctl.o \
 	      llog.o llog_cat.o llog_obd.o llog_swab.o class_obd.o debug.o \
 	      genops.o uuid.o llog_ioctl.o lprocfs_status.o		   \
-	      lustre_handles.o lustre_peer.o llog_osd.o \
+	      lustre_handles.o lustre_peer.o \
 	      local_storage.o statfs_pack.o obdo.o obd_config.o obd_mount.o\
 	      lu_object.o dt_object.o capa.o cl_object.o   \
 	      cl_page.o cl_lock.o cl_io.o lu_ref.o acl.o
diff --git a/drivers/staging/lustre/lustre/obdclass/llog_osd.c b/drivers/staging/lustre/lustre/obdclass/llog_osd.c
deleted file mode 100644
index 2c6a51e..0000000
--- a/drivers/staging/lustre/lustre/obdclass/llog_osd.c
+++ /dev/null
@@ -1,1290 +0,0 @@
-/*
- * 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) 2009, 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_osd.c - low level llog routines on top of OSD API
- *
- * Author: Alexey Zhuravlev <alexey.zhuravlev@xxxxxxxxx>
- * Author: Mikhail Pershin <mike.pershin@xxxxxxxxx>
- */
-
-#define DEBUG_SUBSYSTEM S_LOG
-
-#include "../include/obd.h"
-#include "../include/obd_class.h"
-#include "../include/lustre_fid.h"
-#include "../include/dt_object.h"
-
-#include "llog_internal.h"
-#include "local_storage.h"
-
-/*
- * - multi-chunks or big-declaration approach
- * - use unique sequence instead of llog sb tracking unique ids
- * - re-use existing environment
- * - named llog support (can be used for testing only at the present)
- * - llog_origin_connect() work with OSD API
- */
-
-static int llog_osd_declare_new_object(const struct lu_env *env,
-				       struct local_oid_storage *los,
-				       struct dt_object *o,
-				       struct thandle *th)
-{
-	struct llog_thread_info *lgi = llog_info(env);
-
-	lgi->lgi_attr.la_valid = LA_MODE;
-	lgi->lgi_attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
-	lgi->lgi_dof.dof_type = dt_mode_to_dft(S_IFREG);
-
-	return local_object_declare_create(env, los, o, &lgi->lgi_attr,
-					   &lgi->lgi_dof, th);
-}
-
-static int llog_osd_create_new_object(const struct lu_env *env,
-				      struct local_oid_storage *los,
-				      struct dt_object *o,
-				      struct thandle *th)
-{
-	struct llog_thread_info *lgi = llog_info(env);
-
-	lgi->lgi_attr.la_valid = LA_MODE;
-	lgi->lgi_attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
-	lgi->lgi_dof.dof_type = dt_mode_to_dft(S_IFREG);
-
-	return local_object_create(env, los, o, &lgi->lgi_attr,
-				   &lgi->lgi_dof, th);
-}
-
-static int llog_osd_pad(const struct lu_env *env, struct dt_object *o,
-			loff_t *off, int len, int index, struct thandle *th)
-{
-	struct llog_thread_info	*lgi = llog_info(env);
-	int			 rc;
-
-	LASSERT(th);
-	LASSERT(off);
-	LASSERT(len >= LLOG_MIN_REC_SIZE && (len & 0x7) == 0);
-
-	lgi->lgi_tail.lrt_len = lgi->lgi_lrh.lrh_len = len;
-	lgi->lgi_tail.lrt_index = lgi->lgi_lrh.lrh_index = index;
-	lgi->lgi_lrh.lrh_type = LLOG_PAD_MAGIC;
-
-	lgi->lgi_buf.lb_buf = &lgi->lgi_lrh;
-	lgi->lgi_buf.lb_len = sizeof(lgi->lgi_lrh);
-	dt_write_lock(env, o, 0);
-	rc = dt_record_write(env, o, &lgi->lgi_buf, off, th);
-	if (rc) {
-		CERROR("%s: error writing padding record: rc = %d\n",
-		       o->do_lu.lo_dev->ld_obd->obd_name, rc);
-		GOTO(out, rc);
-	}
-
-	lgi->lgi_buf.lb_buf = &lgi->lgi_tail;
-	lgi->lgi_buf.lb_len = sizeof(lgi->lgi_tail);
-	*off += len - sizeof(lgi->lgi_lrh) - sizeof(lgi->lgi_tail);
-	rc = dt_record_write(env, o, &lgi->lgi_buf, off, th);
-	if (rc)
-		CERROR("%s: error writing padding record: rc = %d\n",
-		       o->do_lu.lo_dev->ld_obd->obd_name, rc);
-out:
-	dt_write_unlock(env, o);
-	return rc;
-}
-
-static int llog_osd_write_blob(const struct lu_env *env, struct dt_object *o,
-			       struct llog_rec_hdr *rec, void *buf,
-			       loff_t *off, struct thandle *th)
-{
-	struct llog_thread_info	*lgi = llog_info(env);
-	int			 buflen = rec->lrh_len;
-	int			 rc;
-
-	LASSERT(env);
-	LASSERT(o);
-
-	if (buflen == 0)
-		CWARN("0-length record\n");
-
-	CDEBUG(D_OTHER, "write blob with type %x, buf %p/%u at off %llu\n",
-	       rec->lrh_type, buf, buflen, *off);
-
-	lgi->lgi_attr.la_valid = LA_SIZE;
-	lgi->lgi_attr.la_size = *off;
-
-	if (!buf) {
-		lgi->lgi_buf.lb_len = buflen;
-		lgi->lgi_buf.lb_buf = rec;
-		rc = dt_record_write(env, o, &lgi->lgi_buf, off, th);
-		if (rc)
-			CERROR("%s: error writing log record: rc = %d\n",
-			       o->do_lu.lo_dev->ld_obd->obd_name, rc);
-		GOTO(out, rc);
-	}
-
-	/* the buf case */
-	/* protect the following 3 writes from concurrent read */
-	dt_write_lock(env, o, 0);
-	rec->lrh_len = sizeof(*rec) + buflen + sizeof(lgi->lgi_tail);
-	lgi->lgi_buf.lb_len = sizeof(*rec);
-	lgi->lgi_buf.lb_buf = rec;
-	rc = dt_record_write(env, o, &lgi->lgi_buf, off, th);
-	if (rc) {
-		CERROR("%s: error writing log hdr: rc = %d\n",
-		       o->do_lu.lo_dev->ld_obd->obd_name, rc);
-		GOTO(out_unlock, rc);
-	}
-
-	lgi->lgi_buf.lb_len = buflen;
-	lgi->lgi_buf.lb_buf = buf;
-	rc = dt_record_write(env, o, &lgi->lgi_buf, off, th);
-	if (rc) {
-		CERROR("%s: error writing log buffer: rc = %d\n",
-		       o->do_lu.lo_dev->ld_obd->obd_name,  rc);
-		GOTO(out_unlock, rc);
-	}
-
-	lgi->lgi_tail.lrt_len = rec->lrh_len;
-	lgi->lgi_tail.lrt_index = rec->lrh_index;
-	lgi->lgi_buf.lb_len = sizeof(lgi->lgi_tail);
-	lgi->lgi_buf.lb_buf = &lgi->lgi_tail;
-	rc = dt_record_write(env, o, &lgi->lgi_buf, off, th);
-	if (rc)
-		CERROR("%s: error writing log tail: rc = %d\n",
-		       o->do_lu.lo_dev->ld_obd->obd_name, rc);
-
-out_unlock:
-	dt_write_unlock(env, o);
-
-out:
-	/* cleanup the content written above */
-	if (rc) {
-		dt_punch(env, o, lgi->lgi_attr.la_size, OBD_OBJECT_EOF, th,
-			 BYPASS_CAPA);
-		dt_attr_set(env, o, &lgi->lgi_attr, th, BYPASS_CAPA);
-	}
-
-	return rc;
-}
-
-static int llog_osd_read_header(const struct lu_env *env,
-				struct llog_handle *handle)
-{
-	struct llog_rec_hdr	*llh_hdr;
-	struct dt_object	*o;
-	struct llog_thread_info	*lgi;
-	int			 rc;
-
-	LASSERT(sizeof(*handle->lgh_hdr) == LLOG_CHUNK_SIZE);
-
-	o = handle->lgh_obj;
-	LASSERT(o);
-
-	lgi = llog_info(env);
-
-	rc = dt_attr_get(env, o, &lgi->lgi_attr, NULL);
-	if (rc)
-		return rc;
-
-	LASSERT(lgi->lgi_attr.la_valid & LA_SIZE);
-
-	if (lgi->lgi_attr.la_size == 0) {
-		CDEBUG(D_HA, "not reading header from 0-byte log\n");
-		return LLOG_EEMPTY;
-	}
-
-	lgi->lgi_off = 0;
-	lgi->lgi_buf.lb_buf = handle->lgh_hdr;
-	lgi->lgi_buf.lb_len = LLOG_CHUNK_SIZE;
-
-	rc = dt_record_read(env, o, &lgi->lgi_buf, &lgi->lgi_off);
-	if (rc) {
-		CERROR("%s: error reading log header from "DFID": rc = %d\n",
-		       o->do_lu.lo_dev->ld_obd->obd_name,
-		       PFID(lu_object_fid(&o->do_lu)), rc);
-		return rc;
-	}
-
-	llh_hdr = &handle->lgh_hdr->llh_hdr;
-	if (LLOG_REC_HDR_NEEDS_SWABBING(llh_hdr))
-		lustre_swab_llog_hdr(handle->lgh_hdr);
-
-	if (llh_hdr->lrh_type != LLOG_HDR_MAGIC) {
-		CERROR("%s: bad log %s "DFID" header magic: %#x "
-		       "(expected %#x)\n", o->do_lu.lo_dev->ld_obd->obd_name,
-		       handle->lgh_name ? handle->lgh_name : "",
-		       PFID(lu_object_fid(&o->do_lu)),
-		       llh_hdr->lrh_type, LLOG_HDR_MAGIC);
-		return -EIO;
-	} else if (llh_hdr->lrh_len != LLOG_CHUNK_SIZE) {
-		CERROR("%s: incorrectly sized log %s "DFID" header: "
-		       "%#x (expected %#x)\n"
-		       "you may need to re-run lconf --write_conf.\n",
-		       o->do_lu.lo_dev->ld_obd->obd_name,
-		       handle->lgh_name ? handle->lgh_name : "",
-		       PFID(lu_object_fid(&o->do_lu)),
-		       llh_hdr->lrh_len, LLOG_CHUNK_SIZE);
-		return -EIO;
-	}
-
-	handle->lgh_last_idx = handle->lgh_hdr->llh_tail.lrt_index;
-
-	return 0;
-}
-
-static int llog_osd_declare_write_rec(const struct lu_env *env,
-				      struct llog_handle *loghandle,
-				      struct llog_rec_hdr *rec,
-				      int idx, struct thandle *th)
-{
-	struct llog_thread_info	*lgi = llog_info(env);
-	struct dt_object	*o;
-	int			 rc;
-
-	LASSERT(env);
-	LASSERT(th);
-	LASSERT(loghandle);
-
-	o = loghandle->lgh_obj;
-	LASSERT(o);
-
-	/* each time we update header */
-	rc = dt_declare_record_write(env, o, sizeof(struct llog_log_hdr), 0,
-				     th);
-	if (rc || idx == 0) /* if error or just header */
-		return rc;
-
-	if (dt_object_exists(o)) {
-		rc = dt_attr_get(env, o, &lgi->lgi_attr, BYPASS_CAPA);
-		lgi->lgi_off = lgi->lgi_attr.la_size;
-		LASSERT(ergo(rc == 0, lgi->lgi_attr.la_valid & LA_SIZE));
-		if (rc)
-			return rc;
-
-		rc = dt_declare_punch(env, o, lgi->lgi_off, OBD_OBJECT_EOF, th);
-		if (rc)
-			return rc;
-	} else {
-		lgi->lgi_off = 0;
-	}
-
-	/* XXX: implement declared window or multi-chunks approach */
-	rc = dt_declare_record_write(env, o, 32 * 1024, lgi->lgi_off, th);
-
-	return rc;
-}
-
-/* returns negative in on error; 0 if success && reccookie == 0; 1 otherwise */
-/* appends if idx == -1, otherwise overwrites record idx. */
-static int llog_osd_write_rec(const struct lu_env *env,
-			      struct llog_handle *loghandle,
-			      struct llog_rec_hdr *rec,
-			      struct llog_cookie *reccookie, int cookiecount,
-			      void *buf, int idx, struct thandle *th)
-{
-	struct llog_thread_info	*lgi = llog_info(env);
-	struct llog_log_hdr	*llh;
-	int			 reclen = rec->lrh_len;
-	int			 index, rc, old_tail_idx;
-	struct llog_rec_tail	*lrt;
-	struct dt_object	*o;
-	size_t			 left;
-
-	LASSERT(env);
-	llh = loghandle->lgh_hdr;
-	LASSERT(llh);
-	o = loghandle->lgh_obj;
-	LASSERT(o);
-	LASSERT(th);
-
-	CDEBUG(D_OTHER, "new record %x to "DFID"\n",
-	       rec->lrh_type, PFID(lu_object_fid(&o->do_lu)));
-
-	/* record length should not bigger than LLOG_CHUNK_SIZE */
-	if (buf)
-		rc = (reclen > LLOG_CHUNK_SIZE - sizeof(struct llog_rec_hdr) -
-		      sizeof(struct llog_rec_tail)) ? -E2BIG : 0;
-	else
-		rc = (reclen > LLOG_CHUNK_SIZE) ? -E2BIG : 0;
-	if (rc)
-		return rc;
-
-	rc = dt_attr_get(env, o, &lgi->lgi_attr, NULL);
-	if (rc)
-		return rc;
-
-	if (buf)
-		/* write_blob adds header and tail to lrh_len. */
-		reclen = sizeof(*rec) + rec->lrh_len +
-			 sizeof(struct llog_rec_tail);
-
-	if (idx != -1) {
-		/* no header: only allowed to insert record 1 */
-		if (idx != 1 && lgi->lgi_attr.la_size == 0)
-			LBUG();
-
-		if (idx && llh->llh_size && llh->llh_size != rec->lrh_len)
-			return -EINVAL;
-
-		if (!ext2_test_bit(idx, llh->llh_bitmap))
-			CERROR("%s: modify unset record %u\n",
-			       o->do_lu.lo_dev->ld_obd->obd_name, idx);
-		if (idx != rec->lrh_index)
-			CERROR("%s: index mismatch %d %u\n",
-			       o->do_lu.lo_dev->ld_obd->obd_name, idx,
-			       rec->lrh_index);
-
-		lgi->lgi_off = 0;
-		rc = llog_osd_write_blob(env, o, &llh->llh_hdr, NULL,
-					 &lgi->lgi_off, th);
-		/* we are done if we only write the header or on error */
-		if (rc || idx == 0)
-			return rc;
-
-		if (buf) {
-			/* We assume that caller has set lgh_cur_* */
-			lgi->lgi_off = loghandle->lgh_cur_offset;
-			CDEBUG(D_OTHER,
-			       "modify record "DOSTID": idx:%d/%u/%d, len:%u "
-			       "offset %llu\n",
-			       POSTID(&loghandle->lgh_id.lgl_oi), idx,
-			       rec->lrh_index,
-			       loghandle->lgh_cur_idx, rec->lrh_len,
-			       (long long)(lgi->lgi_off - sizeof(*llh)));
-			if (rec->lrh_index != loghandle->lgh_cur_idx) {
-				CERROR("%s: modify idx mismatch %u/%d\n",
-				       o->do_lu.lo_dev->ld_obd->obd_name, idx,
-				       loghandle->lgh_cur_idx);
-				return -EFAULT;
-			}
-		} else {
-			/* Assumes constant lrh_len */
-			lgi->lgi_off = sizeof(*llh) + (idx - 1) * reclen;
-		}
-
-		rc = llog_osd_write_blob(env, o, rec, buf, &lgi->lgi_off, th);
-		if (rc == 0 && reccookie) {
-			reccookie->lgc_lgl = loghandle->lgh_id;
-			reccookie->lgc_index = idx;
-			rc = 1;
-		}
-		return rc;
-	}
-
-	/* Make sure that records don't cross a chunk boundary, so we can
-	 * process them page-at-a-time if needed.  If it will cross a chunk
-	 * boundary, write in a fake (but referenced) entry to pad the chunk.
-	 *
-	 * We know that llog_current_log() will return a loghandle that is
-	 * big enough to hold reclen, so all we care about is padding here.
-	 */
-	LASSERT(lgi->lgi_attr.la_valid & LA_SIZE);
-	lgi->lgi_off = lgi->lgi_attr.la_size;
-	left = LLOG_CHUNK_SIZE - (lgi->lgi_off & (LLOG_CHUNK_SIZE - 1));
-	/* NOTE: padding is a record, but no bit is set */
-	if (left != 0 && left != reclen &&
-	    left < (reclen + LLOG_MIN_REC_SIZE)) {
-		index = loghandle->lgh_last_idx + 1;
-		rc = llog_osd_pad(env, o, &lgi->lgi_off, left, index, th);
-		if (rc)
-			return rc;
-		loghandle->lgh_last_idx++; /*for pad rec*/
-	}
-	/* if it's the last idx in log file, then return -ENOSPC */
-	if (loghandle->lgh_last_idx >= LLOG_BITMAP_SIZE(llh) - 1)
-		return -ENOSPC;
-
-	loghandle->lgh_last_idx++;
-	index = loghandle->lgh_last_idx;
-	LASSERT(index < LLOG_BITMAP_SIZE(llh));
-	rec->lrh_index = index;
-	if (buf == NULL) {
-		lrt = (struct llog_rec_tail *)((char *)rec + rec->lrh_len -
-					       sizeof(*lrt));
-		lrt->lrt_len = rec->lrh_len;
-		lrt->lrt_index = rec->lrh_index;
-	}
-	/* The caller should make sure only 1 process access the lgh_last_idx,
-	 * Otherwise it might hit the assert.*/
-	LASSERT(index < LLOG_BITMAP_SIZE(llh));
-	spin_lock(&loghandle->lgh_hdr_lock);
-	if (ext2_set_bit(index, llh->llh_bitmap)) {
-		CERROR("%s: index %u already set in log bitmap\n",
-		       o->do_lu.lo_dev->ld_obd->obd_name, index);
-		spin_unlock(&loghandle->lgh_hdr_lock);
-		LBUG(); /* should never happen */
-	}
-	llh->llh_count++;
-	spin_unlock(&loghandle->lgh_hdr_lock);
-	old_tail_idx = llh->llh_tail.lrt_index;
-	llh->llh_tail.lrt_index = index;
-
-	lgi->lgi_off = 0;
-	rc = llog_osd_write_blob(env, o, &llh->llh_hdr, NULL, &lgi->lgi_off,
-				 th);
-	if (rc)
-		GOTO(out, rc);
-
-	rc = dt_attr_get(env, o, &lgi->lgi_attr, NULL);
-	if (rc)
-		GOTO(out, rc);
-
-	LASSERT(lgi->lgi_attr.la_valid & LA_SIZE);
-	lgi->lgi_off = lgi->lgi_attr.la_size;
-
-	rc = llog_osd_write_blob(env, o, rec, buf, &lgi->lgi_off, th);
-
-out:
-	/* cleanup llog for error case */
-	if (rc) {
-		spin_lock(&loghandle->lgh_hdr_lock);
-		ext2_clear_bit(index, llh->llh_bitmap);
-		llh->llh_count--;
-		spin_unlock(&loghandle->lgh_hdr_lock);
-
-		/* restore the header */
-		loghandle->lgh_last_idx--;
-		llh->llh_tail.lrt_index = old_tail_idx;
-		lgi->lgi_off = 0;
-		llog_osd_write_blob(env, o, &llh->llh_hdr, NULL,
-				    &lgi->lgi_off, th);
-	}
-
-	CDEBUG(D_RPCTRACE, "added record "DOSTID": idx: %u, %u\n",
-	       POSTID(&loghandle->lgh_id.lgl_oi), index, rec->lrh_len);
-	if (rc == 0 && reccookie) {
-		reccookie->lgc_lgl = loghandle->lgh_id;
-		reccookie->lgc_index = index;
-		if ((rec->lrh_type == MDS_UNLINK_REC) ||
-		    (rec->lrh_type == MDS_SETATTR64_REC))
-			reccookie->lgc_subsys = LLOG_MDS_OST_ORIG_CTXT;
-		else if (rec->lrh_type == OST_SZ_REC)
-			reccookie->lgc_subsys = LLOG_SIZE_ORIG_CTXT;
-		else
-			reccookie->lgc_subsys = -1;
-		rc = 1;
-	}
-	return rc;
-}
-
-/* We can skip reading at least as many log blocks as the number of
- * minimum sized log records we are skipping.  If it turns out
- * that we are not far enough along the log (because the
- * actual records are larger than minimum size) we just skip
- * some more records.
- */
-static void llog_skip_over(__u64 *off, int curr, int goal)
-{
-	if (goal <= curr)
-		return;
-	*off = (*off + (goal - curr - 1) * LLOG_MIN_REC_SIZE) &
-		~(LLOG_CHUNK_SIZE - 1);
-}
-
-/* sets:
- *  - cur_offset to the furthest point read in the log file
- *  - cur_idx to the log index preceding cur_offset
- * returns -EIO/-EINVAL on error
- */
-static int llog_osd_next_block(const struct lu_env *env,
-			       struct llog_handle *loghandle, int *cur_idx,
-			       int next_idx, __u64 *cur_offset, void *buf,
-			       int len)
-{
-	struct llog_thread_info	*lgi = llog_info(env);
-	struct dt_object	*o;
-	struct dt_device	*dt;
-	int			 rc;
-
-	LASSERT(env);
-	LASSERT(lgi);
-
-	if (len == 0 || len & (LLOG_CHUNK_SIZE - 1))
-		return -EINVAL;
-
-	CDEBUG(D_OTHER, "looking for log index %u (cur idx %u off %llu)\n",
-	       next_idx, *cur_idx, *cur_offset);
-
-	LASSERT(loghandle);
-	LASSERT(loghandle->lgh_ctxt);
-
-	o = loghandle->lgh_obj;
-	LASSERT(o);
-	LASSERT(dt_object_exists(o));
-	dt = lu2dt_dev(o->do_lu.lo_dev);
-	LASSERT(dt);
-
-	rc = dt_attr_get(env, o, &lgi->lgi_attr, BYPASS_CAPA);
-	if (rc)
-		GOTO(out, rc);
-
-	while (*cur_offset < lgi->lgi_attr.la_size) {
-		struct llog_rec_hdr	*rec, *last_rec;
-		struct llog_rec_tail	*tail;
-
-		llog_skip_over(cur_offset, *cur_idx, next_idx);
-
-		/* read up to next LLOG_CHUNK_SIZE block */
-		lgi->lgi_buf.lb_len = LLOG_CHUNK_SIZE -
-				      (*cur_offset & (LLOG_CHUNK_SIZE - 1));
-		lgi->lgi_buf.lb_buf = buf;
-
-		/* Note: read lock is not needed around la_size get above at
-		 * the time of dt_attr_get(). There are only two cases that
-		 * matter. Either la_size == cur_offset, in which case the
-		 * entire read is skipped, or la_size > cur_offset and the loop
-		 * is entered and this thread is blocked at dt_read_lock()
-		 * until the write is completed. When the write completes, then
-		 * the dt_read() will be done with the full length, and will
-		 * get the full data.
-		 */
-		dt_read_lock(env, o, 0);
-		rc = dt_read(env, o, &lgi->lgi_buf, cur_offset);
-		dt_read_unlock(env, o);
-		if (rc < 0) {
-			CERROR("%s: can't read llog block from log "DFID
-			       " offset %llu: rc = %d\n",
-			       o->do_lu.lo_dev->ld_obd->obd_name,
-			       PFID(lu_object_fid(&o->do_lu)), *cur_offset,
-			       rc);
-			GOTO(out, rc);
-		}
-
-		if (rc < len) {
-			/* signal the end of the valid buffer to
-			 * llog_process */
-			memset(buf + rc, 0, len - rc);
-		}
-
-		if (rc == 0) /* end of file, nothing to do */
-			GOTO(out, rc);
-
-		if (rc < sizeof(*tail)) {
-			CERROR("%s: invalid llog block at log id "DOSTID"/%u "
-			       "offset %llu\n",
-			       o->do_lu.lo_dev->ld_obd->obd_name,
-			       POSTID(&loghandle->lgh_id.lgl_oi),
-			       loghandle->lgh_id.lgl_ogen, *cur_offset);
-			GOTO(out, rc = -EINVAL);
-		}
-
-		rec = buf;
-		if (LLOG_REC_HDR_NEEDS_SWABBING(rec))
-			lustre_swab_llog_rec(rec);
-
-		tail = (struct llog_rec_tail *)((char *)buf + rc -
-						sizeof(struct llog_rec_tail));
-		/* get the last record in block */
-		last_rec = (struct llog_rec_hdr *)((char *)buf + rc -
-						   le32_to_cpu(tail->lrt_len));
-
-		if (LLOG_REC_HDR_NEEDS_SWABBING(last_rec))
-			lustre_swab_llog_rec(last_rec);
-		LASSERT(last_rec->lrh_index == tail->lrt_index);
-
-		*cur_idx = tail->lrt_index;
-
-		/* this shouldn't happen */
-		if (tail->lrt_index == 0) {
-			CERROR("%s: invalid llog tail at log id "DOSTID"/%u "
-			       "offset %llu\n",
-			       o->do_lu.lo_dev->ld_obd->obd_name,
-			       POSTID(&loghandle->lgh_id.lgl_oi),
-			       loghandle->lgh_id.lgl_ogen, *cur_offset);
-			GOTO(out, rc = -EINVAL);
-		}
-		if (tail->lrt_index < next_idx)
-			continue;
-
-		/* sanity check that the start of the new buffer is no farther
-		 * than the record that we wanted.  This shouldn't happen. */
-		if (rec->lrh_index > next_idx) {
-			CERROR("%s: missed desired record? %u > %u\n",
-			       o->do_lu.lo_dev->ld_obd->obd_name,
-			       rec->lrh_index, next_idx);
-			GOTO(out, rc = -ENOENT);
-		}
-		GOTO(out, rc = 0);
-	}
-	GOTO(out, rc = -EIO);
-out:
-	return rc;
-}
-
-static int llog_osd_prev_block(const struct lu_env *env,
-			       struct llog_handle *loghandle,
-			       int prev_idx, void *buf, int len)
-{
-	struct llog_thread_info	*lgi = llog_info(env);
-	struct dt_object	*o;
-	struct dt_device	*dt;
-	loff_t			 cur_offset;
-	int			 rc;
-
-	if (len == 0 || len & (LLOG_CHUNK_SIZE - 1))
-		return -EINVAL;
-
-	CDEBUG(D_OTHER, "looking for log index %u\n", prev_idx);
-
-	LASSERT(loghandle);
-	LASSERT(loghandle->lgh_ctxt);
-
-	o = loghandle->lgh_obj;
-	LASSERT(o);
-	LASSERT(dt_object_exists(o));
-	dt = lu2dt_dev(o->do_lu.lo_dev);
-	LASSERT(dt);
-
-	cur_offset = LLOG_CHUNK_SIZE;
-	llog_skip_over(&cur_offset, 0, prev_idx);
-
-	rc = dt_attr_get(env, o, &lgi->lgi_attr, BYPASS_CAPA);
-	if (rc)
-		GOTO(out, rc);
-
-	while (cur_offset < lgi->lgi_attr.la_size) {
-		struct llog_rec_hdr	*rec, *last_rec;
-		struct llog_rec_tail	*tail;
-
-		lgi->lgi_buf.lb_len = len;
-		lgi->lgi_buf.lb_buf = buf;
-		/* It is OK to have locking around dt_read() only, see
-		 * comment in llog_osd_next_block for details
-		 */
-		dt_read_lock(env, o, 0);
-		rc = dt_read(env, o, &lgi->lgi_buf, &cur_offset);
-		dt_read_unlock(env, o);
-		if (rc < 0) {
-			CERROR("%s: can't read llog block from log "DFID
-			       " offset %llu: rc = %d\n",
-			       o->do_lu.lo_dev->ld_obd->obd_name,
-			       PFID(lu_object_fid(&o->do_lu)), cur_offset, rc);
-			GOTO(out, rc);
-		}
-
-		if (rc == 0) /* end of file, nothing to do */
-			GOTO(out, rc);
-
-		if (rc < sizeof(*tail)) {
-			CERROR("%s: invalid llog block at log id "DOSTID"/%u "
-			       "offset %llu\n",
-			       o->do_lu.lo_dev->ld_obd->obd_name,
-			       POSTID(&loghandle->lgh_id.lgl_oi),
-			       loghandle->lgh_id.lgl_ogen, cur_offset);
-			GOTO(out, rc = -EINVAL);
-		}
-
-		rec = buf;
-		if (LLOG_REC_HDR_NEEDS_SWABBING(rec))
-			lustre_swab_llog_rec(rec);
-
-		tail = (struct llog_rec_tail *)((char *)buf + rc -
-						sizeof(struct llog_rec_tail));
-		/* get the last record in block */
-		last_rec = (struct llog_rec_hdr *)((char *)buf + rc -
-						   le32_to_cpu(tail->lrt_len));
-
-		if (LLOG_REC_HDR_NEEDS_SWABBING(last_rec))
-			lustre_swab_llog_rec(last_rec);
-		LASSERT(last_rec->lrh_index == tail->lrt_index);
-
-		/* this shouldn't happen */
-		if (tail->lrt_index == 0) {
-			CERROR("%s: invalid llog tail at log id "DOSTID"/%u "
-			       "offset %llu\n",
-			       o->do_lu.lo_dev->ld_obd->obd_name,
-			       POSTID(&loghandle->lgh_id.lgl_oi),
-			       loghandle->lgh_id.lgl_ogen, cur_offset);
-			GOTO(out, rc = -EINVAL);
-		}
-		if (tail->lrt_index < prev_idx)
-			continue;
-
-		/* sanity check that the start of the new buffer is no farther
-		 * than the record that we wanted.  This shouldn't happen. */
-		if (rec->lrh_index > prev_idx) {
-			CERROR("%s: missed desired record? %u > %u\n",
-			       o->do_lu.lo_dev->ld_obd->obd_name,
-			       rec->lrh_index, prev_idx);
-			GOTO(out, rc = -ENOENT);
-		}
-		GOTO(out, rc = 0);
-	}
-	GOTO(out, rc = -EIO);
-out:
-	return rc;
-}
-
-struct dt_object *llog_osd_dir_get(const struct lu_env *env,
-				   struct llog_ctxt *ctxt)
-{
-	struct dt_device	*dt;
-	struct dt_thread_info	*dti = dt_info(env);
-	struct dt_object	*dir;
-	int			 rc;
-
-	dt = ctxt->loc_exp->exp_obd->obd_lvfs_ctxt.dt;
-	if (ctxt->loc_dir == NULL) {
-		rc = dt_root_get(env, dt, &dti->dti_fid);
-		if (rc)
-			return ERR_PTR(rc);
-		dir = dt_locate(env, dt, &dti->dti_fid);
-	} else {
-		lu_object_get(&ctxt->loc_dir->do_lu);
-		dir = ctxt->loc_dir;
-	}
-
-	return dir;
-}
-
-static int llog_osd_open(const struct lu_env *env, struct llog_handle *handle,
-			 struct llog_logid *logid, char *name,
-			 enum llog_open_param open_param)
-{
-	struct llog_thread_info		*lgi = llog_info(env);
-	struct llog_ctxt		*ctxt = handle->lgh_ctxt;
-	struct dt_object		*o;
-	struct dt_device		*dt;
-	struct ls_device		*ls;
-	struct local_oid_storage	*los;
-	int				 rc = 0;
-
-	LASSERT(env);
-	LASSERT(ctxt);
-	LASSERT(ctxt->loc_exp);
-	LASSERT(ctxt->loc_exp->exp_obd);
-	dt = ctxt->loc_exp->exp_obd->obd_lvfs_ctxt.dt;
-	LASSERT(dt);
-
-	ls = ls_device_get(dt);
-	if (IS_ERR(ls))
-		return PTR_ERR(ls);
-
-	mutex_lock(&ls->ls_los_mutex);
-	los = dt_los_find(ls, name != NULL ? FID_SEQ_LLOG_NAME : FID_SEQ_LLOG);
-	mutex_unlock(&ls->ls_los_mutex);
-	LASSERT(los);
-	ls_device_put(env, ls);
-
-	LASSERT(handle);
-
-	if (logid != NULL) {
-		logid_to_fid(logid, &lgi->lgi_fid);
-	} else if (name) {
-		struct dt_object *llog_dir;
-
-		llog_dir = llog_osd_dir_get(env, ctxt);
-		if (IS_ERR(llog_dir))
-			GOTO(out, rc = PTR_ERR(llog_dir));
-		dt_read_lock(env, llog_dir, 0);
-		rc = dt_lookup_dir(env, llog_dir, name, &lgi->lgi_fid);
-		dt_read_unlock(env, llog_dir);
-		lu_object_put(env, &llog_dir->do_lu);
-		if (rc == -ENOENT && open_param == LLOG_OPEN_NEW) {
-			/* generate fid for new llog */
-			rc = local_object_fid_generate(env, los,
-						       &lgi->lgi_fid);
-		}
-		if (rc < 0)
-			GOTO(out, rc);
-		OBD_ALLOC(handle->lgh_name, strlen(name) + 1);
-		if (handle->lgh_name)
-			strcpy(handle->lgh_name, name);
-		else
-			GOTO(out, rc = -ENOMEM);
-	} else {
-		LASSERTF(open_param & LLOG_OPEN_NEW, "%#x\n", open_param);
-		/* generate fid for new llog */
-		rc = local_object_fid_generate(env, los, &lgi->lgi_fid);
-		if (rc < 0)
-			GOTO(out, rc);
-	}
-
-	o = ls_locate(env, ls, &lgi->lgi_fid);
-	if (IS_ERR(o))
-		GOTO(out_name, rc = PTR_ERR(o));
-
-	/* No new llog is expected but doesn't exist */
-	if (open_param != LLOG_OPEN_NEW && !dt_object_exists(o))
-		GOTO(out_put, rc = -ENOENT);
-
-	fid_to_logid(&lgi->lgi_fid, &handle->lgh_id);
-	handle->lgh_obj = o;
-	handle->private_data = los;
-	LASSERT(handle->lgh_ctxt);
-
-	return rc;
-
-out_put:
-	lu_object_put(env, &o->do_lu);
-out_name:
-	if (handle->lgh_name != NULL)
-		OBD_FREE(handle->lgh_name, strlen(name) + 1);
-out:
-	dt_los_put(los);
-	return rc;
-}
-
-static int llog_osd_exist(struct llog_handle *handle)
-{
-	LASSERT(handle->lgh_obj);
-	return (dt_object_exists(handle->lgh_obj) &&
-		!lu_object_is_dying(handle->lgh_obj->do_lu.lo_header));
-}
-
-static int llog_osd_declare_create(const struct lu_env *env,
-				   struct llog_handle *res, struct thandle *th)
-{
-	struct llog_thread_info		*lgi = llog_info(env);
-	struct local_oid_storage	*los;
-	struct dt_object		*o;
-	int				 rc;
-
-	LASSERT(res->lgh_obj);
-	LASSERT(th);
-
-	/* object can be created by another thread */
-	o = res->lgh_obj;
-	if (dt_object_exists(o))
-		return 0;
-
-	los = res->private_data;
-	LASSERT(los);
-
-	rc = llog_osd_declare_new_object(env, los, o, th);
-	if (rc)
-		return rc;
-
-	rc = dt_declare_record_write(env, o, LLOG_CHUNK_SIZE, 0, th);
-	if (rc)
-		return rc;
-
-	if (res->lgh_name) {
-		struct dt_object *llog_dir;
-
-		llog_dir = llog_osd_dir_get(env, res->lgh_ctxt);
-		if (IS_ERR(llog_dir))
-			return PTR_ERR(llog_dir);
-		logid_to_fid(&res->lgh_id, &lgi->lgi_fid);
-		rc = dt_declare_insert(env, llog_dir,
-				       (struct dt_rec *)&lgi->lgi_fid,
-				       (struct dt_key *)res->lgh_name, th);
-		lu_object_put(env, &llog_dir->do_lu);
-		if (rc)
-			CERROR("%s: can't declare named llog %s: rc = %d\n",
-			       o->do_lu.lo_dev->ld_obd->obd_name,
-			       res->lgh_name, rc);
-	}
-	return rc;
-}
-
-/* This is a callback from the llog_* functions.
- * Assumes caller has already pushed us into the kernel context. */
-static int llog_osd_create(const struct lu_env *env, struct llog_handle *res,
-			   struct thandle *th)
-{
-	struct llog_thread_info *lgi = llog_info(env);
-	struct local_oid_storage *los;
-	struct dt_object	*o;
-	int		      rc = 0;
-
-	LASSERT(env);
-	o = res->lgh_obj;
-	LASSERT(o);
-
-	/* llog can be already created */
-	if (dt_object_exists(o))
-		return -EEXIST;
-
-	los = res->private_data;
-	LASSERT(los);
-
-	dt_write_lock(env, o, 0);
-	if (!dt_object_exists(o))
-		rc = llog_osd_create_new_object(env, los, o, th);
-	else
-		rc = -EEXIST;
-
-	dt_write_unlock(env, o);
-	if (rc)
-		return rc;
-
-	if (res->lgh_name) {
-		struct dt_object *llog_dir;
-
-		llog_dir = llog_osd_dir_get(env, res->lgh_ctxt);
-		if (IS_ERR(llog_dir))
-			return PTR_ERR(llog_dir);
-
-		logid_to_fid(&res->lgh_id, &lgi->lgi_fid);
-		dt_read_lock(env, llog_dir, 0);
-		rc = dt_insert(env, llog_dir,
-			       (struct dt_rec *)&lgi->lgi_fid,
-			       (struct dt_key *)res->lgh_name,
-			       th, BYPASS_CAPA, 1);
-		dt_read_unlock(env, llog_dir);
-		lu_object_put(env, &llog_dir->do_lu);
-		if (rc)
-			CERROR("%s: can't create named llog %s: rc = %d\n",
-			       o->do_lu.lo_dev->ld_obd->obd_name,
-			       res->lgh_name, rc);
-	}
-	return rc;
-}
-
-static int llog_osd_close(const struct lu_env *env, struct llog_handle *handle)
-{
-	struct local_oid_storage	*los;
-	int				 rc = 0;
-
-	LASSERT(handle->lgh_obj);
-
-	lu_object_put(env, &handle->lgh_obj->do_lu);
-
-	los = handle->private_data;
-	LASSERT(los);
-	dt_los_put(los);
-
-	if (handle->lgh_name)
-		OBD_FREE(handle->lgh_name, strlen(handle->lgh_name) + 1);
-
-	return rc;
-}
-
-static int llog_osd_destroy(const struct lu_env *env,
-			    struct llog_handle *loghandle)
-{
-	struct llog_ctxt	*ctxt;
-	struct dt_object	*o, *llog_dir = NULL;
-	struct dt_device	*d;
-	struct thandle		*th;
-	char			*name = NULL;
-	int			 rc;
-
-	ctxt = loghandle->lgh_ctxt;
-	LASSERT(ctxt);
-
-	o = loghandle->lgh_obj;
-	LASSERT(o);
-
-	d = lu2dt_dev(o->do_lu.lo_dev);
-	LASSERT(d);
-	LASSERT(d == ctxt->loc_exp->exp_obd->obd_lvfs_ctxt.dt);
-
-	th = dt_trans_create(env, d);
-	if (IS_ERR(th))
-		return PTR_ERR(th);
-
-	if (loghandle->lgh_name) {
-		llog_dir = llog_osd_dir_get(env, ctxt);
-		if (IS_ERR(llog_dir))
-			GOTO(out_trans, rc = PTR_ERR(llog_dir));
-
-		name = loghandle->lgh_name;
-		rc = dt_declare_delete(env, llog_dir,
-				       (struct dt_key *)name, th);
-		if (rc)
-			GOTO(out_trans, rc);
-	}
-
-	dt_declare_ref_del(env, o, th);
-
-	rc = dt_declare_destroy(env, o, th);
-	if (rc)
-		GOTO(out_trans, rc);
-
-	rc = dt_trans_start_local(env, d, th);
-	if (rc)
-		GOTO(out_trans, rc);
-
-	dt_write_lock(env, o, 0);
-	if (dt_object_exists(o)) {
-		if (name) {
-			dt_read_lock(env, llog_dir, 0);
-			rc = dt_delete(env, llog_dir,
-				       (struct dt_key *) name,
-				       th, BYPASS_CAPA);
-			dt_read_unlock(env, llog_dir);
-			if (rc) {
-				CERROR("%s: can't remove llog %s: rc = %d\n",
-				       o->do_lu.lo_dev->ld_obd->obd_name,
-				       name, rc);
-				GOTO(out_unlock, rc);
-			}
-		}
-		dt_ref_del(env, o, th);
-		rc = dt_destroy(env, o, th);
-		if (rc)
-			GOTO(out_unlock, rc);
-	}
-out_unlock:
-	dt_write_unlock(env, o);
-out_trans:
-	dt_trans_stop(env, d, th);
-	if (llog_dir != NULL)
-		lu_object_put(env, &llog_dir->do_lu);
-	return rc;
-}
-
-static int llog_osd_setup(const struct lu_env *env, struct obd_device *obd,
-			  struct obd_llog_group *olg, int ctxt_idx,
-			  struct obd_device *disk_obd)
-{
-	struct local_oid_storage	*los;
-	struct llog_thread_info		*lgi = llog_info(env);
-	struct llog_ctxt		*ctxt;
-	int				 rc = 0;
-
-	LASSERT(obd);
-	LASSERT(olg->olg_ctxts[ctxt_idx]);
-
-	ctxt = llog_ctxt_get(olg->olg_ctxts[ctxt_idx]);
-	LASSERT(ctxt);
-
-	/* initialize data allowing to generate new fids,
-	 * literally we need a sequence */
-	lgi->lgi_fid.f_seq = FID_SEQ_LLOG;
-	lgi->lgi_fid.f_oid = 1;
-	lgi->lgi_fid.f_ver = 0;
-	rc = local_oid_storage_init(env, disk_obd->obd_lvfs_ctxt.dt,
-				    &lgi->lgi_fid, &los);
-	if (rc < 0)
-		return rc;
-
-	lgi->lgi_fid.f_seq = FID_SEQ_LLOG_NAME;
-	lgi->lgi_fid.f_oid = 1;
-	lgi->lgi_fid.f_ver = 0;
-	rc = local_oid_storage_init(env, disk_obd->obd_lvfs_ctxt.dt,
-				    &lgi->lgi_fid, &los);
-	llog_ctxt_put(ctxt);
-	return rc;
-}
-
-static int llog_osd_cleanup(const struct lu_env *env, struct llog_ctxt *ctxt)
-{
-	struct dt_device		*dt;
-	struct ls_device		*ls;
-	struct local_oid_storage	*los, *nlos;
-
-	LASSERT(ctxt->loc_exp->exp_obd);
-	dt = ctxt->loc_exp->exp_obd->obd_lvfs_ctxt.dt;
-	ls = ls_device_get(dt);
-	if (IS_ERR(ls))
-		return PTR_ERR(ls);
-
-	mutex_lock(&ls->ls_los_mutex);
-	los = dt_los_find(ls, FID_SEQ_LLOG);
-	nlos = dt_los_find(ls, FID_SEQ_LLOG_NAME);
-	mutex_unlock(&ls->ls_los_mutex);
-	if (los != NULL) {
-		dt_los_put(los);
-		local_oid_storage_fini(env, los);
-	}
-	if (nlos != NULL) {
-		dt_los_put(nlos);
-		local_oid_storage_fini(env, nlos);
-	}
-	ls_device_put(env, ls);
-	return 0;
-}
-
-struct llog_operations llog_osd_ops = {
-	.lop_next_block		= llog_osd_next_block,
-	.lop_prev_block		= llog_osd_prev_block,
-	.lop_read_header	= llog_osd_read_header,
-	.lop_destroy		= llog_osd_destroy,
-	.lop_setup		= llog_osd_setup,
-	.lop_cleanup		= llog_osd_cleanup,
-	.lop_open		= llog_osd_open,
-	.lop_exist		= llog_osd_exist,
-	.lop_declare_create	= llog_osd_declare_create,
-	.lop_create		= llog_osd_create,
-	.lop_declare_write_rec	= llog_osd_declare_write_rec,
-	.lop_write_rec		= llog_osd_write_rec,
-	.lop_close		= llog_osd_close,
-};
-EXPORT_SYMBOL(llog_osd_ops);
-
-/* reads the catalog list */
-int llog_osd_get_cat_list(const struct lu_env *env, struct dt_device *d,
-			  int idx, int count, struct llog_catid *idarray)
-{
-	struct llog_thread_info	*lgi = llog_info(env);
-	struct dt_object	*o = NULL;
-	struct thandle		*th;
-	int			 rc, size;
-
-	LASSERT(d);
-
-	size = sizeof(*idarray) * count;
-	lgi->lgi_off = idx *  sizeof(*idarray);
-
-	lu_local_obj_fid(&lgi->lgi_fid, LLOG_CATALOGS_OID);
-
-	o = dt_locate(env, d, &lgi->lgi_fid);
-	if (IS_ERR(o))
-		return PTR_ERR(o);
-
-	if (!dt_object_exists(o)) {
-		th = dt_trans_create(env, d);
-		if (IS_ERR(th))
-			GOTO(out, rc = PTR_ERR(th));
-
-		lgi->lgi_attr.la_valid = LA_MODE;
-		lgi->lgi_attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
-		lgi->lgi_dof.dof_type = dt_mode_to_dft(S_IFREG);
-
-		rc = dt_declare_create(env, o, &lgi->lgi_attr, NULL,
-				       &lgi->lgi_dof, th);
-		if (rc)
-			GOTO(out_trans, rc);
-
-		rc = dt_trans_start_local(env, d, th);
-		if (rc)
-			GOTO(out_trans, rc);
-
-		dt_write_lock(env, o, 0);
-		if (!dt_object_exists(o))
-			rc = dt_create(env, o, &lgi->lgi_attr, NULL,
-				       &lgi->lgi_dof, th);
-		dt_write_unlock(env, o);
-out_trans:
-		dt_trans_stop(env, d, th);
-		if (rc)
-			GOTO(out, rc);
-	}
-
-	rc = dt_attr_get(env, o, &lgi->lgi_attr, BYPASS_CAPA);
-	if (rc)
-		GOTO(out, rc);
-
-	if (!S_ISREG(lgi->lgi_attr.la_mode)) {
-		CERROR("%s: CATALOGS is not a regular file!: mode = %o\n",
-		       o->do_lu.lo_dev->ld_obd->obd_name,
-		       lgi->lgi_attr.la_mode);
-		GOTO(out, rc = -ENOENT);
-	}
-
-	CDEBUG(D_CONFIG, "cat list: disk size=%d, read=%d\n",
-	       (int)lgi->lgi_attr.la_size, size);
-
-	/* return just number of llogs */
-	if (idarray == NULL) {
-		rc = lgi->lgi_attr.la_size / sizeof(*idarray);
-		GOTO(out, rc);
-	}
-
-	/* read for new ost index or for empty file */
-	memset(idarray, 0, size);
-	if (lgi->lgi_attr.la_size < lgi->lgi_off + size)
-		GOTO(out, rc = 0);
-	if (lgi->lgi_attr.la_size < lgi->lgi_off + size)
-		size = lgi->lgi_attr.la_size - lgi->lgi_off;
-
-	lgi->lgi_buf.lb_buf = idarray;
-	lgi->lgi_buf.lb_len = size;
-	rc = dt_record_read(env, o, &lgi->lgi_buf, &lgi->lgi_off);
-	if (rc) {
-		CERROR("%s: error reading CATALOGS: rc = %d\n",
-		       o->do_lu.lo_dev->ld_obd->obd_name,  rc);
-		GOTO(out, rc);
-	}
-
-out:
-	lu_object_put(env, &o->do_lu);
-	return rc;
-}
-EXPORT_SYMBOL(llog_osd_get_cat_list);
-
-/* writes the cat list */
-int llog_osd_put_cat_list(const struct lu_env *env, struct dt_device *d,
-			  int idx, int count, struct llog_catid *idarray)
-{
-	struct llog_thread_info	*lgi = llog_info(env);
-	struct dt_object	*o = NULL;
-	struct thandle		*th;
-	int			 rc, size;
-
-	if (!count)
-		return 0;
-
-	LASSERT(d);
-
-	size = sizeof(*idarray) * count;
-	lgi->lgi_off = idx * sizeof(*idarray);
-
-	lu_local_obj_fid(&lgi->lgi_fid, LLOG_CATALOGS_OID);
-
-	o = dt_locate(env, d, &lgi->lgi_fid);
-	if (IS_ERR(o))
-		return PTR_ERR(o);
-
-	if (!dt_object_exists(o))
-		GOTO(out, rc = -ENOENT);
-
-	rc = dt_attr_get(env, o, &lgi->lgi_attr, BYPASS_CAPA);
-	if (rc)
-		GOTO(out, rc);
-
-	if (!S_ISREG(lgi->lgi_attr.la_mode)) {
-		CERROR("%s: CATALOGS is not a regular file!: mode = %o\n",
-		       o->do_lu.lo_dev->ld_obd->obd_name,
-		       lgi->lgi_attr.la_mode);
-		GOTO(out, rc = -ENOENT);
-	}
-
-	th = dt_trans_create(env, d);
-	if (IS_ERR(th))
-		GOTO(out, rc = PTR_ERR(th));
-
-	rc = dt_declare_record_write(env, o, size, lgi->lgi_off, th);
-	if (rc)
-		GOTO(out, rc);
-
-	rc = dt_trans_start_local(env, d, th);
-	if (rc)
-		GOTO(out_trans, rc);
-
-	lgi->lgi_buf.lb_buf = idarray;
-	lgi->lgi_buf.lb_len = size;
-	rc = dt_record_write(env, o, &lgi->lgi_buf, &lgi->lgi_off, th);
-	if (rc)
-		CDEBUG(D_INODE, "error writing CATALOGS: rc = %d\n", rc);
-out_trans:
-	dt_trans_stop(env, d, th);
-out:
-	lu_object_put(env, &o->do_lu);
-	return rc;
-}
-EXPORT_SYMBOL(llog_osd_put_cat_list);
-- 
1.9.3

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