4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2012, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
32 * lustre/obdclass/llog_osd.c
34 * Low level llog routines on top of OSD API
36 * This file provides set of methods for llog operations on top of
37 * dt_device. It contains all supported llog_operations interfaces and
38 * supplimental functions.
40 * Author: Alexey Zhuravlev <alexey.zhuravlev@intel.com>
41 * Author: Mikhail Pershin <mike.pershin@intel.com>
44 #define DEBUG_SUBSYSTEM S_LOG
46 #include <linux/delay.h>
48 #include <dt_object.h>
49 #include <llog_swab.h>
50 #include <lustre_fid.h>
52 #include <obd_class.h>
54 #include "llog_internal.h"
55 #include "local_storage.h"
58 * Implementation of the llog_operations::lop_declare_create
60 * This function is a wrapper over local_storage API function
61 * local_object_declare_create().
63 * \param[in] env execution environment
64 * \param[in] los local_storage for bottom storage device
65 * \param[in] o dt_object to create
66 * \param[in] th current transaction handle
68 * \retval 0 on successful declaration of the new object
69 * \retval negative error if declaration was failed
71 static int llog_osd_declare_new_object(const struct lu_env *env,
72 struct local_oid_storage *los,
76 struct llog_thread_info *lgi = llog_info(env);
78 lgi->lgi_attr.la_valid = LA_MODE;
79 lgi->lgi_attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
80 lgi->lgi_dof.dof_type = dt_mode_to_dft(S_IFREG);
82 return local_object_declare_create(env, los, o, &lgi->lgi_attr,
87 * Implementation of the llog_operations::lop_create
89 * This function is a wrapper over local_storage API function
90 * local_object_create().
92 * \param[in] env execution environment
93 * \param[in] los local_storage for bottom storage device
94 * \param[in] o dt_object to create
95 * \param[in] th current transaction handle
97 * \retval 0 on successful creation of the new object
98 * \retval negative error if creation was failed
100 static int llog_osd_create_new_object(const struct lu_env *env,
101 struct local_oid_storage *los,
105 struct llog_thread_info *lgi = llog_info(env);
107 lgi->lgi_attr.la_valid = LA_MODE;
108 lgi->lgi_attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
109 lgi->lgi_dof.dof_type = dt_mode_to_dft(S_IFREG);
111 return local_object_create(env, los, o, &lgi->lgi_attr,
116 * Implementation of the llog_operations::lop_exist
118 * This function checks that llog exists on storage.
120 * \param[in] handle llog handle of the current llog
122 * \retval true if llog object exists and is not just destroyed
123 * \retval false if llog doesn't exist or just destroyed
125 static int llog_osd_exist(struct llog_handle *handle)
127 LASSERT(handle->lgh_obj);
128 return dt_object_exists(handle->lgh_obj) && !handle->lgh_destroyed;
131 static void *rec_tail(struct llog_rec_hdr *rec)
133 return (void *)((char *)rec + rec->lrh_len -
134 sizeof(struct llog_rec_tail));
138 * Write a padding record to the llog
140 * This function writes a padding record to the end of llog. That may
141 * be needed if llog contains records of variable size, e.g. config logs
143 * The padding record just aligns llog to the llog chunk_size boundary if
144 * the current record doesn't fit in the remaining space.
146 * It allocates full length to avoid two separate writes for header and tail.
147 * Such 2-steps scheme needs extra protection and complex error handling.
149 * \param[in] env execution environment
150 * \param[in] o dt_object to create
151 * \param[in,out] off pointer to the padding start offset
152 * \param[in] len padding length
153 * \param[in] index index of the padding record in a llog
154 * \param[in] th current transaction handle
156 * \retval 0 on successful padding write
157 * \retval negative error if write failed
159 static int llog_osd_pad(const struct lu_env *env, struct dt_object *o,
160 loff_t *off, int len, int index, struct thandle *th)
162 struct llog_thread_info *lgi = llog_info(env);
163 struct llog_rec_hdr *rec;
164 struct llog_rec_tail *tail;
171 LASSERT(len >= LLOG_MIN_REC_SIZE && (len & 0x7) == 0);
178 rec->lrh_index = index;
179 rec->lrh_type = LLOG_PAD_MAGIC;
181 tail = rec_tail(rec);
183 tail->lrt_index = index;
185 lgi->lgi_buf.lb_buf = rec;
186 lgi->lgi_buf.lb_len = len;
187 rc = dt_record_write(env, o, &lgi->lgi_buf, off, th);
189 CERROR("%s: error writing padding record: rc = %d\n",
190 o->do_lu.lo_dev->ld_obd->obd_name, rc);
197 * Implementation of the llog_operations::lop_read_header
199 * This function reads the current llog header from the bottom storage
202 * \param[in] env execution environment
203 * \param[in] handle llog handle of the current llog
205 * \retval 0 on successful header read
206 * \retval negative error if read failed
208 static int llog_osd_read_header(const struct lu_env *env,
209 struct llog_handle *handle)
211 struct llog_rec_hdr *llh_hdr;
213 struct llog_thread_info *lgi;
214 enum llog_flag flags;
222 lgi = llog_info(env);
224 dt_read_lock(env, o, 0);
226 rc = dt_attr_get(env, o, &lgi->lgi_attr);
230 LASSERT(lgi->lgi_attr.la_valid & LA_SIZE);
232 if (lgi->lgi_attr.la_size == 0) {
233 CDEBUG(D_HA, "not reading header from 0-byte log\n");
234 GOTO(unlock, rc = LLOG_EEMPTY);
237 flags = handle->lgh_hdr->llh_flags;
240 lgi->lgi_buf.lb_buf = handle->lgh_hdr;
241 lgi->lgi_buf.lb_len = handle->lgh_hdr_size;
242 rc = dt_read(env, o, &lgi->lgi_buf, &lgi->lgi_off);
243 llh_hdr = &handle->lgh_hdr->llh_hdr;
244 if (rc < sizeof(*llh_hdr) || rc < llh_hdr->lrh_len) {
245 CERROR("%s: error reading "DFID" log header size %d: rc = %d\n",
246 o->do_lu.lo_dev->ld_obd->obd_name,
247 PFID(lu_object_fid(&o->do_lu)), rc < 0 ? 0 : rc,
256 if (LLOG_REC_HDR_NEEDS_SWABBING(llh_hdr))
257 lustre_swab_llog_hdr(handle->lgh_hdr);
259 if (llh_hdr->lrh_type != LLOG_HDR_MAGIC) {
260 CERROR("%s: bad log %s "DFID" header magic: %#x "
261 "(expected %#x)\n", o->do_lu.lo_dev->ld_obd->obd_name,
262 handle->lgh_name ? handle->lgh_name : "",
263 PFID(lu_object_fid(&o->do_lu)),
264 llh_hdr->lrh_type, LLOG_HDR_MAGIC);
265 GOTO(unlock, rc = -EIO);
266 } else if (llh_hdr->lrh_len < LLOG_MIN_CHUNK_SIZE ||
267 llh_hdr->lrh_len > handle->lgh_hdr_size) {
268 CERROR("%s: incorrectly sized log %s "DFID" header: "
269 "%#x (expected at least %#x)\n"
270 "you may need to re-run lconf --write_conf.\n",
271 o->do_lu.lo_dev->ld_obd->obd_name,
272 handle->lgh_name ? handle->lgh_name : "",
273 PFID(lu_object_fid(&o->do_lu)),
274 llh_hdr->lrh_len, LLOG_MIN_CHUNK_SIZE);
275 GOTO(unlock, rc = -EIO);
276 } else if (LLOG_HDR_TAIL(handle->lgh_hdr)->lrt_index >
277 LLOG_HDR_BITMAP_SIZE(handle->lgh_hdr) ||
278 LLOG_HDR_TAIL(handle->lgh_hdr)->lrt_len !=
280 CERROR("%s: incorrectly sized log %s "DFID" tailer: "
282 o->do_lu.lo_dev->ld_obd->obd_name,
283 handle->lgh_name ? handle->lgh_name : "",
284 PFID(lu_object_fid(&o->do_lu)),
285 LLOG_HDR_TAIL(handle->lgh_hdr)->lrt_len, -EIO);
286 GOTO(unlock, rc = -EIO);
289 handle->lgh_hdr->llh_flags |= (flags & LLOG_F_EXT_MASK);
290 handle->lgh_last_idx = LLOG_HDR_TAIL(handle->lgh_hdr)->lrt_index;
294 dt_read_unlock(env, o);
299 * Implementation of the llog_operations::lop_declare_write
301 * This function declares the new record write.
303 * \param[in] env execution environment
304 * \param[in] loghandle llog handle of the current llog
305 * \param[in] rec llog record header. This is a real header of the full
306 * llog record to write. This is the beginning of buffer
307 * to write, the length of buffer is stored in
309 * \param[in] idx index of the llog record. If \a idx == -1 then this is
310 * append case, otherwise \a idx is the index of record
312 * \param[in] th current transaction handle
314 * \retval 0 on successful declaration
315 * \retval negative error if declaration failed
317 static int llog_osd_declare_write_rec(const struct lu_env *env,
318 struct llog_handle *loghandle,
319 struct llog_rec_hdr *rec,
320 int idx, struct thandle *th)
322 struct llog_thread_info *lgi = llog_info(env);
333 LASSERT(rec->lrh_len <= loghandle->lgh_ctxt->loc_chunk_size);
335 o = loghandle->lgh_obj;
338 chunk_size = loghandle->lgh_ctxt->loc_chunk_size;
339 lgi->lgi_buf.lb_len = chunk_size;
340 lgi->lgi_buf.lb_buf = NULL;
341 /* each time we update header */
342 rc = dt_declare_record_write(env, o, &lgi->lgi_buf, 0,
344 if (rc || idx == 0) /* if error or just header */
348 * the pad record can be inserted so take into account double
351 lgi->lgi_buf.lb_len = chunk_size * 2;
352 lgi->lgi_buf.lb_buf = NULL;
353 /* XXX: implement declared window or multi-chunks approach */
354 rc = dt_declare_record_write(env, o, &lgi->lgi_buf, -1, th);
360 * Implementation of the llog_operations::lop_write
362 * This function writes the new record in the llog or modify the existed one.
364 * \param[in] env execution environment
365 * \param[in] loghandle llog handle of the current llog
366 * \param[in] rec llog record header. This is a real header of
367 * the full llog record to write. This is
368 * the beginning of buffer to write, the length
369 * of buffer is stored in \a rec::lrh_len
370 * \param[in,out] reccookie pointer to the cookie to return back if needed.
371 * It is used for further cancel of this llog
373 * \param[in] idx index of the llog record. If \a idx == -1 then
374 * this is append case, otherwise \a idx is
375 * the index of record to modify
376 * \param[in] th current transaction handle
378 * \retval 0 on successful write && \a reccookie == NULL
379 * 1 on successful write && \a reccookie != NULL
380 * \retval negative error if write failed
382 static int llog_osd_write_rec(const struct lu_env *env,
383 struct llog_handle *loghandle,
384 struct llog_rec_hdr *rec,
385 struct llog_cookie *reccookie,
386 int idx, struct thandle *th)
388 struct llog_thread_info *lgi = llog_info(env);
389 struct llog_log_hdr *llh;
390 int reclen = rec->lrh_len;
392 struct llog_rec_tail *lrt;
400 llh = loghandle->lgh_hdr;
401 o = loghandle->lgh_obj;
403 chunk_size = llh->llh_hdr.lrh_len;
404 CDEBUG(D_OTHER, "new record %x to "DFID"\n",
405 rec->lrh_type, PFID(lu_object_fid(&o->do_lu)));
407 if (!llog_osd_exist(loghandle))
410 /* record length should not bigger than */
411 if (reclen > loghandle->lgh_hdr->llh_hdr.lrh_len)
414 /* sanity check for fixed-records llog */
415 if (idx != LLOG_HEADER_IDX && (llh->llh_flags & LLOG_F_IS_FIXSIZE)) {
416 LASSERT(llh->llh_size != 0);
417 LASSERT(llh->llh_size == reclen);
420 /* return error if osp object is stale */
421 if (idx != LLOG_HEADER_IDX && dt_object_stale(o))
423 rc = dt_attr_get(env, o, &lgi->lgi_attr);
428 * The modification case.
429 * If idx set then the record with that index must be modified.
430 * There are three cases possible:
431 * 1) the common case is the llog header update (idx == 0)
432 * 2) the llog record modification during llog process.
433 * This is indicated by the \a loghandle::lgh_cur_idx > 0.
434 * In that case the \a loghandle::lgh_cur_offset
435 * 3) otherwise this is assumed that llog consist of records of
436 * fixed size, i.e. catalog. The llog header must has llh_size
437 * field equal to record size. The record offset is calculated
438 * just by /a idx value
440 * During modification we don't need extra header update because
441 * the bitmap and record count are not changed. The record header
442 * and tail remains the same too.
444 if (idx != LLOG_NEXT_IDX) {
445 /* llog can be empty only when first record is being written */
446 LASSERT(ergo(idx > 0, lgi->lgi_attr.la_size > 0));
448 if (!test_bit_le(idx, LLOG_HDR_BITMAP(llh))) {
449 CERROR("%s: modify unset record %u\n",
450 o->do_lu.lo_dev->ld_obd->obd_name, idx);
454 if (idx != rec->lrh_index) {
455 CERROR("%s: modify index mismatch %d %u\n",
456 o->do_lu.lo_dev->ld_obd->obd_name, idx,
461 if (idx == LLOG_HEADER_IDX) {
462 /* llog header update */
463 __u32 *bitmap = LLOG_HDR_BITMAP(llh);
467 /* If it does not indicate the bitmap index
468 * (reccookie == NULL), then it means update
469 * the whole update header. Otherwise only
470 * update header and bits needs to be updated,
471 * and in DNE cases, it will signaficantly
472 * shrink the RPC size.
473 * see distribute_txn_cancel_records()*/
474 if (reccookie == NULL) {
475 lgi->lgi_buf.lb_len = reclen;
476 lgi->lgi_buf.lb_buf = rec;
477 rc = dt_record_write(env, o, &lgi->lgi_buf,
482 /* update the header */
483 lgi->lgi_buf.lb_len = llh->llh_bitmap_offset;
484 lgi->lgi_buf.lb_buf = llh;
485 rc = dt_record_write(env, o, &lgi->lgi_buf,
490 /* update the bitmap */
491 index = reccookie->lgc_index;
492 lgi->lgi_off = llh->llh_bitmap_offset +
493 (index / (sizeof(*bitmap) * 8)) *
495 lgi->lgi_buf.lb_len = sizeof(*bitmap);
496 lgi->lgi_buf.lb_buf =
497 &bitmap[index/(sizeof(*bitmap)*8)];
498 rc = dt_record_write(env, o, &lgi->lgi_buf,
502 } else if (llh->llh_flags & LLOG_F_IS_FIXSIZE) {
503 lgi->lgi_off = llh->llh_hdr.lrh_len +
505 } else if (reccookie != NULL && reccookie->lgc_index > 0) {
507 * The lgc_offset can be used only if index is
510 if (idx != reccookie->lgc_index) {
511 CERROR("%s: modify index mismatch %d %d\n",
512 o->do_lu.lo_dev->ld_obd->obd_name, idx,
513 reccookie->lgc_index);
517 lgi->lgi_off = reccookie->lgc_offset;
518 CDEBUG(D_OTHER, "modify record "DFID": idx:%u, "
519 "len:%u offset %llu\n",
520 PFID(&loghandle->lgh_id.lgl_oi.oi_fid), idx,
521 rec->lrh_len, (long long)lgi->lgi_off);
523 /* This can be result of lgh_cur_idx is not set during
524 * llog processing or llh_size is not set to proper
525 * record size for fixed records llog. Therefore it is
526 * impossible to get record offset. */
527 CERROR("%s: can't get record offset, idx:%d, "
528 "len:%u.\n", o->do_lu.lo_dev->ld_obd->obd_name,
533 /* update only data, header and tail remain the same */
534 lgi->lgi_off += sizeof(struct llog_rec_hdr);
535 lgi->lgi_buf.lb_len = REC_DATA_LEN(rec);
536 lgi->lgi_buf.lb_buf = REC_DATA(rec);
537 rc = dt_record_write(env, o, &lgi->lgi_buf, &lgi->lgi_off, th);
538 if (rc == 0 && reccookie) {
539 reccookie->lgc_lgl = loghandle->lgh_id;
540 reccookie->lgc_index = idx;
548 * The most common case of using llog. The new index is assigned to
549 * the new record, new bit is set in llog bitmap and llog count is
552 * Make sure that records don't cross a chunk boundary, so we can
553 * process them page-at-a-time if needed. If it will cross a chunk
554 * boundary, write in a fake (but referenced) entry to pad the chunk.
558 /* simulate ENOSPC when new plain llog is being added to the
560 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_LLOG_CREATE_FAILED2) &&
561 llh->llh_flags & LLOG_F_IS_CAT)
564 LASSERT(lgi->lgi_attr.la_valid & LA_SIZE);
565 orig_last_idx = loghandle->lgh_last_idx;
566 lgi->lgi_off = lgi->lgi_attr.la_size;
568 if (loghandle->lgh_max_size > 0 &&
569 lgi->lgi_off >= loghandle->lgh_max_size) {
570 CDEBUG(D_OTHER, "llog is getting too large (%u > %u) at %u "
571 DFID"\n", (unsigned)lgi->lgi_off,
572 loghandle->lgh_max_size, (int)loghandle->lgh_last_idx,
573 PFID(&loghandle->lgh_id.lgl_oi.oi_fid));
574 /* this is to signal that this llog is full */
575 loghandle->lgh_last_idx = LLOG_HDR_BITMAP_SIZE(llh) - 1;
579 left = chunk_size - (lgi->lgi_off & (chunk_size - 1));
580 /* NOTE: padding is a record, but no bit is set */
581 if (left != 0 && left != reclen &&
582 left < (reclen + LLOG_MIN_REC_SIZE)) {
583 index = loghandle->lgh_last_idx + 1;
584 rc = llog_osd_pad(env, o, &lgi->lgi_off, left, index, th);
588 loghandle->lgh_last_idx++; /* for pad rec */
591 /* if it's the last idx in log file, then return -ENOSPC
592 * or wrap around if a catalog */
593 if (llog_is_full(loghandle) ||
594 unlikely(llh->llh_flags & LLOG_F_IS_CAT &&
595 OBD_FAIL_PRECHECK(OBD_FAIL_CAT_RECORDS) &&
596 loghandle->lgh_last_idx >= cfs_fail_val)) {
597 if (llh->llh_flags & LLOG_F_IS_CAT)
598 loghandle->lgh_last_idx = 0;
603 down_write(&loghandle->lgh_last_sem);
604 /* increment the last_idx along with llh_tail index, they should
605 * be equal for a llog lifetime */
606 if (OBD_FAIL_CHECK(OBD_FAIL_LLOG_ADD_GAP) && --cfs_fail_val == 0)
607 loghandle->lgh_last_idx++;
608 loghandle->lgh_last_idx++;
609 index = loghandle->lgh_last_idx;
610 LLOG_HDR_TAIL(llh)->lrt_index = index;
612 * NB: the caller should make sure only 1 process access
613 * the lgh_last_idx, e.g. append should be exclusive.
614 * Otherwise it might hit the assert.
616 LASSERT(index < LLOG_HDR_BITMAP_SIZE(llh));
617 rec->lrh_index = index;
619 lrt->lrt_len = rec->lrh_len;
620 lrt->lrt_index = rec->lrh_index;
622 /* the lgh_hdr_mutex protects llog header data from concurrent
623 * update/cancel, the llh_count and llh_bitmap are protected */
624 mutex_lock(&loghandle->lgh_hdr_mutex);
625 if (__test_and_set_bit_le(index, LLOG_HDR_BITMAP(llh))) {
626 CERROR("%s: index %u already set in llog bitmap "DFID"\n",
627 o->do_lu.lo_dev->ld_obd->obd_name, index,
628 PFID(lu_object_fid(&o->do_lu)));
629 mutex_unlock(&loghandle->lgh_hdr_mutex);
630 LBUG(); /* should never happen */
634 if (!(llh->llh_flags & LLOG_F_IS_FIXSIZE)) {
635 /* Update the minimum size of the llog record */
636 if (llh->llh_size == 0)
637 llh->llh_size = reclen;
638 else if (reclen < llh->llh_size)
639 llh->llh_size = reclen;
643 * readers (e.g. llog_osd_read_header()) must not find
644 * llog updated partially (bitmap/counter claims record,
645 * but a record hasn't been added yet) as this results
648 dt_write_lock(env, o, 0);
650 if (lgi->lgi_attr.la_size == 0) {
652 lgi->lgi_buf.lb_len = llh->llh_hdr.lrh_len;
653 lgi->lgi_buf.lb_buf = &llh->llh_hdr;
654 rc = dt_record_write(env, o, &lgi->lgi_buf, &lgi->lgi_off, th);
656 GOTO(out_unlock, rc);
658 __u32 *bitmap = LLOG_HDR_BITMAP(llh);
660 /* Note: If this is not initialization (size == 0), then do not
661 * write the whole header (8k bytes), only update header/tail
662 * and bits needs to be updated. Because this update might be
663 * part of cross-MDT operation, which needs to write these
664 * updates into the update log(32KB limit) and also pack inside
665 * the RPC (1MB limit), if we write 8K for each operation, which
666 * will cost a lot space, and keep us adding more updates to one
669 lgi->lgi_buf.lb_len = llh->llh_bitmap_offset;
670 lgi->lgi_buf.lb_buf = &llh->llh_hdr;
671 rc = dt_record_write(env, o, &lgi->lgi_buf, &lgi->lgi_off, th);
673 GOTO(out_unlock, rc);
675 lgi->lgi_off = llh->llh_bitmap_offset +
676 (index / (sizeof(*bitmap) * 8)) * sizeof(*bitmap);
677 lgi->lgi_buf.lb_len = sizeof(*bitmap);
678 lgi->lgi_buf.lb_buf = &bitmap[index/(sizeof(*bitmap)*8)];
679 rc = dt_record_write(env, o, &lgi->lgi_buf, &lgi->lgi_off, th);
681 GOTO(out_unlock, rc);
683 lgi->lgi_off = (unsigned long)LLOG_HDR_TAIL(llh) -
685 lgi->lgi_buf.lb_len = sizeof(llh->llh_tail);
686 lgi->lgi_buf.lb_buf = LLOG_HDR_TAIL(llh);
687 rc = dt_record_write(env, o, &lgi->lgi_buf, &lgi->lgi_off, th);
689 GOTO(out_unlock, rc);
691 if (OBD_FAIL_PRECHECK(OBD_FAIL_LLOG_PAUSE_AFTER_PAD) && pad) {
692 /* a window for concurrent llog reader, see LU-12577 */
693 OBD_FAIL_TIMEOUT(OBD_FAIL_LLOG_PAUSE_AFTER_PAD,
698 /* unlock here for remote object */
699 mutex_unlock(&loghandle->lgh_hdr_mutex);
701 dt_write_unlock(env, o);
705 if (OBD_FAIL_PRECHECK(OBD_FAIL_LLOG_PROCESS_TIMEOUT) &&
706 cfs_fail_val == (unsigned int)(loghandle->lgh_id.lgl_oi.oi.oi_id &
708 OBD_RACE(OBD_FAIL_LLOG_PROCESS_TIMEOUT);
709 msleep(1 * MSEC_PER_SEC);
711 /* computed index can be used to determine offset for fixed-size
712 * records. This also allows to handle Catalog wrap around case */
713 if (llh->llh_flags & LLOG_F_IS_FIXSIZE) {
714 lgi->lgi_off = llh->llh_hdr.lrh_len + (index - 1) * reclen;
716 rc = dt_attr_get(env, o, &lgi->lgi_attr);
718 dt_write_unlock(env, o);
722 LASSERT(lgi->lgi_attr.la_valid & LA_SIZE);
723 lgi->lgi_off = max_t(__u64, lgi->lgi_attr.la_size,
727 lgi->lgi_buf.lb_len = reclen;
728 lgi->lgi_buf.lb_buf = rec;
729 rc = dt_record_write(env, o, &lgi->lgi_buf, &lgi->lgi_off, th);
731 dt_write_unlock(env, o);
735 up_write(&loghandle->lgh_last_sem);
737 CDEBUG(D_HA, "added record "DFID".%u, %u off%llu\n",
738 PFID(lu_object_fid(&o->do_lu)), index, rec->lrh_len,
740 if (reccookie != NULL) {
741 reccookie->lgc_lgl = loghandle->lgh_id;
742 reccookie->lgc_index = index;
743 if ((rec->lrh_type == MDS_UNLINK_REC) ||
744 (rec->lrh_type == MDS_SETATTR64_REC))
745 reccookie->lgc_subsys = LLOG_MDS_OST_ORIG_CTXT;
746 else if (rec->lrh_type == OST_SZ_REC)
747 reccookie->lgc_subsys = LLOG_SIZE_ORIG_CTXT;
749 reccookie->lgc_subsys = -1;
754 /* cleanup llog for error case */
755 mutex_lock(&loghandle->lgh_hdr_mutex);
756 clear_bit_le(index, LLOG_HDR_BITMAP(llh));
758 mutex_unlock(&loghandle->lgh_hdr_mutex);
760 /* restore llog last_idx */
761 if (dt_object_remote(o)) {
762 loghandle->lgh_last_idx = orig_last_idx;
763 } else if (--loghandle->lgh_last_idx == 0 &&
764 (llh->llh_flags & LLOG_F_IS_CAT) && llh->llh_cat_idx != 0) {
765 /* catalog had just wrap-around case */
766 loghandle->lgh_last_idx = LLOG_HDR_BITMAP_SIZE(llh) - 1;
769 LLOG_HDR_TAIL(llh)->lrt_index = loghandle->lgh_last_idx;
770 up_write(&loghandle->lgh_last_sem);
776 * We can skip reading at least as many log blocks as the number of
777 * minimum sized log records we are skipping. If it turns out
778 * that we are not far enough along the log (because the
779 * actual records are larger than minimum size) we just skip
782 * Note: in llog_process_thread, it will use bitmap offset as
783 * the index to locate the record, which also includs some pad
784 * records, whose record size is very small, and it also does not
785 * consider pad record when recording minimum record size (otherwise
786 * min_record size might be too small), so in some rare cases,
787 * it might skip too much record for @goal, see llog_osd_next_block().
789 * When force_mini_rec is true, it means we have to use LLOG_MIN_REC_SIZE
790 * as the min record size to skip over, usually because in the previous
791 * try, it skip too much record, see loog_osd_next(prev)_block().
793 static inline void llog_skip_over(struct llog_handle *lgh, __u64 *off,
794 int curr, int goal, __u32 chunk_size,
797 struct llog_log_hdr *llh = lgh->lgh_hdr;
799 /* Goal should not bigger than the record count */
800 if (goal > lgh->lgh_last_idx)
801 goal = lgh->lgh_last_idx;
804 if (llh->llh_flags & LLOG_F_IS_FIXSIZE) {
805 *off = chunk_size + (goal - 1) * llh->llh_size;
807 __u64 min_rec_size = LLOG_MIN_REC_SIZE;
809 if (llh->llh_size > 0 && !force_mini_rec)
810 min_rec_size = llh->llh_size;
812 *off = *off + (goal - curr - 1) * min_rec_size;
815 /* always align with lower chunk boundary*/
816 *off &= ~(chunk_size - 1);
820 * Remove optional fields that the client doesn't expect.
821 * This is typically in order to ensure compatibility with older clients.
822 * It is assumed that since we exclusively remove fields, the block will be
823 * big enough to handle the remapped records. It is also assumed that records
824 * of a block have the same format (i.e.: the same features enabled).
826 * \param[in,out] hdr Header of the block of records to remap.
827 * \param[in,out] last_hdr Last header, don't read past this point.
828 * \param[in] flags Flags describing the fields to keep.
829 * \param[in] extra_flags Flags describing the extra fields to keep.
831 static void changelog_block_trim_ext(struct llog_rec_hdr *hdr,
832 struct llog_rec_hdr *last_hdr,
833 struct llog_handle *loghandle)
835 enum changelog_rec_flags flags = CLF_SUPPORTED;
836 enum changelog_rec_extra_flags extra_flags = CLFE_SUPPORTED;
838 if (!(loghandle->lgh_hdr->llh_flags & LLOG_F_EXT_X_XATTR))
839 extra_flags &= ~CLFE_XATTR;
840 if (!(loghandle->lgh_hdr->llh_flags & LLOG_F_EXT_X_OMODE))
841 extra_flags &= ~CLFE_OPEN;
842 if (!(loghandle->lgh_hdr->llh_flags & LLOG_F_EXT_X_NID))
843 extra_flags &= ~CLFE_NID;
844 if (!(loghandle->lgh_hdr->llh_flags & LLOG_F_EXT_X_UIDGID))
845 extra_flags &= ~CLFE_UIDGID;
846 if (!(loghandle->lgh_hdr->llh_flags & LLOG_F_EXT_EXTRA_FLAGS))
847 flags &= ~CLF_EXTRA_FLAGS;
848 if (!(loghandle->lgh_hdr->llh_flags & LLOG_F_EXT_JOBID))
851 if (flags == CLF_SUPPORTED && extra_flags == CLFE_SUPPORTED)
854 if (hdr->lrh_type != CHANGELOG_REC)
858 struct changelog_rec *rec = (struct changelog_rec *)(hdr + 1);
859 enum changelog_rec_extra_flags xflag = CLFE_INVALID;
861 if (flags & CLF_EXTRA_FLAGS &&
862 rec->cr_flags & CLF_EXTRA_FLAGS) {
863 xflag = changelog_rec_extra_flags(rec)->cr_extra_flags &
867 if (unlikely(hdr->lrh_len == 0)) {
868 /* It is corruption case, we cannot know the next rec,
869 * jump to the last one directly to avoid dead loop. */
870 LCONSOLE(D_WARNING, "Hit invalid llog record: "
871 "idx %u, type %u, id %u\n",
872 hdr->lrh_index, hdr->lrh_type, hdr->lrh_id);
873 hdr = llog_rec_hdr_next(last_hdr);
874 if (unlikely(hdr == last_hdr))
875 LCONSOLE(D_WARNING, "The last record crashed: "
876 "idx %u, type %u, id %u\n",
877 hdr->lrh_index, hdr->lrh_type,
882 changelog_remap_rec(rec, rec->cr_flags & flags, xflag);
883 hdr = llog_rec_hdr_next(hdr);
884 /* Yield CPU to avoid soft-lockup if there are too many records
887 } while ((char *)hdr <= (char *)last_hdr);
891 * Implementation of the llog_operations::lop_next_block
893 * This function finds the the next llog block to return which contains
894 * record with required index. It is main part of llog processing.
896 * \param[in] env execution environment
897 * \param[in] loghandle llog handle of the current llog
898 * \param[in,out] cur_idx index preceeding cur_offset
899 * \param[in] next_idx target index to find
900 * \param[in,out] cur_offset furtherst point read in the file
901 * \param[in] buf pointer to data buffer to fill
902 * \param[in] len required len to read, it is
903 * usually llog chunk_size.
905 * \retval 0 on successful buffer read
906 * \retval negative value on error
908 static int llog_osd_next_block(const struct lu_env *env,
909 struct llog_handle *loghandle, int *cur_idx,
910 int next_idx, __u64 *cur_offset, void *buf,
913 struct llog_thread_info *lgi = llog_info(env);
915 struct dt_device *dt;
918 int last_idx = *cur_idx;
919 __u64 last_offset = *cur_offset;
920 bool force_mini_rec = false;
927 chunk_size = loghandle->lgh_hdr->llh_hdr.lrh_len;
928 if (len == 0 || len & (chunk_size - 1))
932 LASSERT(loghandle->lgh_ctxt);
934 if (OBD_FAIL_PRECHECK(OBD_FAIL_MDS_CHANGELOG_DEL) &&
935 cfs_fail_val == ((unsigned long)loghandle & 0xFFFFFFFF)) {
936 OBD_RACE(OBD_FAIL_MDS_CHANGELOG_DEL);
937 msleep(MSEC_PER_SEC >> 2);
940 o = loghandle->lgh_obj;
942 dt_read_lock(env, o, 0);
943 if (!llog_osd_exist(loghandle))
944 GOTO(out, rc = -ESTALE); //object was destroyed
946 dt = lu2dt_dev(o->do_lu.lo_dev);
949 rc = dt_attr_get(env, o, &lgi->lgi_attr);
954 "looking for log index %u (cur idx %u off %llu), size %llu\n",
956 *cur_offset, lgi->lgi_attr.la_size);
958 while (*cur_offset < lgi->lgi_attr.la_size) {
959 struct llog_rec_hdr *rec, *last_rec;
960 struct llog_rec_tail *tail;
962 llog_skip_over(loghandle, cur_offset, *cur_idx,
963 next_idx, chunk_size, force_mini_rec);
965 /* read up to next llog chunk_size block */
966 lgi->lgi_buf.lb_len = chunk_size -
967 (*cur_offset & (chunk_size - 1));
968 lgi->lgi_buf.lb_buf = buf;
970 rc = dt_read(env, o, &lgi->lgi_buf, cur_offset);
972 if (rc == -EBADR && !force_mini_rec)
975 CERROR("%s: can't read llog block from log "DFID
976 " offset %llu: rc = %d\n",
977 o->do_lu.lo_dev->ld_obd->obd_name,
978 PFID(lu_object_fid(&o->do_lu)), *cur_offset,
984 /* signal the end of the valid buffer to
986 memset(buf + rc, 0, len - rc);
989 if (rc == 0) { /* end of file, nothing to do */
995 if (rc < sizeof(*tail)) {
999 CERROR("%s: invalid llog block at log id "DFID":%x "
1001 o->do_lu.lo_dev->ld_obd->obd_name,
1002 PFID(&loghandle->lgh_id.lgl_oi.oi_fid),
1003 loghandle->lgh_id.lgl_ogen, *cur_offset);
1004 GOTO(out, rc = -EINVAL);
1008 if (LLOG_REC_HDR_NEEDS_SWABBING(rec))
1009 lustre_swab_llog_rec(rec);
1010 tail = (struct llog_rec_tail *)((char *)buf + rc -
1011 sizeof(struct llog_rec_tail));
1013 if (llog_verify_record(loghandle, rec)) {
1015 * the block seems corrupted. make a pad record so the
1016 * caller can skip the block and try with the next one
1019 rec->lrh_index = next_idx;
1020 rec->lrh_type = LLOG_PAD_MAGIC;
1022 tail = rec_tail(rec);
1024 tail->lrt_index = next_idx;
1029 /* get the last record in block */
1030 last_rec = (struct llog_rec_hdr *)((char *)buf + rc -
1033 if (LLOG_REC_HDR_NEEDS_SWABBING(last_rec))
1034 lustre_swab_llog_rec(last_rec);
1036 if (last_rec->lrh_index != tail->lrt_index) {
1037 CERROR("%s: invalid llog tail at log id "DFID":%x offset %llu last_rec idx %u tail idx %u lrt len %u read_size %d\n",
1038 o->do_lu.lo_dev->ld_obd->obd_name,
1039 PFID(&loghandle->lgh_id.lgl_oi.oi_fid),
1040 loghandle->lgh_id.lgl_ogen, *cur_offset,
1041 last_rec->lrh_index, tail->lrt_index,
1043 GOTO(out, rc = -EINVAL);
1046 *cur_idx = tail->lrt_index;
1048 /* this shouldn't happen */
1049 if (tail->lrt_index == 0) {
1050 CERROR("%s: invalid llog tail at log id "DFID":%x "
1051 "offset %llu bytes %d\n",
1052 o->do_lu.lo_dev->ld_obd->obd_name,
1053 PFID(&loghandle->lgh_id.lgl_oi.oi_fid),
1054 loghandle->lgh_id.lgl_ogen, *cur_offset, rc);
1055 GOTO(out, rc = -EINVAL);
1057 if (tail->lrt_index < next_idx) {
1058 last_idx = *cur_idx;
1059 last_offset = *cur_offset;
1063 /* sanity check that the start of the new buffer is no farther
1064 * than the record that we wanted. This shouldn't happen. */
1065 if (next_idx && rec->lrh_index > next_idx) {
1066 if (!force_mini_rec && next_idx > last_idx)
1069 CERROR("%s: missed desired record? %u > %u\n",
1070 o->do_lu.lo_dev->ld_obd->obd_name,
1071 rec->lrh_index, next_idx);
1072 GOTO(out, rc = -ENOENT);
1075 /* Trim unsupported extensions for compat w/ older clients */
1076 changelog_block_trim_ext(rec, last_rec, loghandle);
1081 /* Note: because there are some pad records in the
1082 * llog, so llog_skip_over() might skip too much
1083 * records, let's try skip again with minimum record */
1084 force_mini_rec = true;
1085 *cur_offset = last_offset;
1086 *cur_idx = last_idx;
1088 GOTO(out, rc = -EIO);
1090 dt_read_unlock(env, o);
1095 * Implementation of the llog_operations::lop_prev_block
1097 * This function finds the llog block to return which contains
1098 * record with required index but in reverse order - from end of llog
1100 * It is main part of reverse llog processing.
1102 * \param[in] env execution environment
1103 * \param[in] loghandle llog handle of the current llog
1104 * \param[in] prev_idx target index to find
1105 * \param[in] buf pointer to data buffer to fill
1106 * \param[in] len required len to read, it is llog_chunk_size usually.
1108 * \retval 0 on successful buffer read
1109 * \retval negative value on error
1111 static int llog_osd_prev_block(const struct lu_env *env,
1112 struct llog_handle *loghandle,
1113 int prev_idx, void *buf, int len)
1115 struct llog_thread_info *lgi = llog_info(env);
1116 struct dt_object *o;
1117 struct dt_device *dt;
1124 chunk_size = loghandle->lgh_hdr->llh_hdr.lrh_len;
1125 if (len == 0 || len & (chunk_size - 1))
1128 CDEBUG(D_OTHER, "looking for log index %u\n", prev_idx);
1131 LASSERT(loghandle->lgh_ctxt);
1133 o = loghandle->lgh_obj;
1135 dt_read_lock(env, o, 0);
1136 if (!llog_osd_exist(loghandle))
1137 GOTO(out, rc = -ESTALE);
1139 dt = lu2dt_dev(o->do_lu.lo_dev);
1142 /* Let's only use mini record size for previous block read
1144 cur_offset = chunk_size;
1145 llog_skip_over(loghandle, &cur_offset, 0, prev_idx,
1148 rc = dt_attr_get(env, o, &lgi->lgi_attr);
1152 while (cur_offset < lgi->lgi_attr.la_size) {
1153 struct llog_rec_hdr *rec, *last_rec;
1154 struct llog_rec_tail *tail;
1156 lgi->lgi_buf.lb_len = len;
1157 lgi->lgi_buf.lb_buf = buf;
1158 rc = dt_read(env, o, &lgi->lgi_buf, &cur_offset);
1160 CERROR("%s: can't read llog block from log "DFID
1161 " offset %llu: rc = %d\n",
1162 o->do_lu.lo_dev->ld_obd->obd_name,
1163 PFID(lu_object_fid(&o->do_lu)), cur_offset, rc);
1167 if (rc == 0) /* end of file, nothing to do */
1170 if (rc < sizeof(*tail)) {
1171 CERROR("%s: invalid llog block at log id "DFID":%x "
1173 o->do_lu.lo_dev->ld_obd->obd_name,
1174 PFID(&loghandle->lgh_id.lgl_oi.oi_fid),
1175 loghandle->lgh_id.lgl_ogen, cur_offset);
1176 GOTO(out, rc = -EINVAL);
1180 if (LLOG_REC_HDR_NEEDS_SWABBING(rec))
1181 lustre_swab_llog_rec(rec);
1183 tail = (struct llog_rec_tail *)((char *)buf + rc -
1184 sizeof(struct llog_rec_tail));
1185 /* get the last record in block */
1186 last_rec = (struct llog_rec_hdr *)((char *)buf + rc -
1187 le32_to_cpu(tail->lrt_len));
1189 if (LLOG_REC_HDR_NEEDS_SWABBING(last_rec))
1190 lustre_swab_llog_rec(last_rec);
1191 LASSERT(last_rec->lrh_index == tail->lrt_index);
1193 /* this shouldn't happen */
1194 if (tail->lrt_index == 0) {
1195 CERROR("%s: invalid llog tail at log id "DFID":%x "
1197 o->do_lu.lo_dev->ld_obd->obd_name,
1198 PFID(&loghandle->lgh_id.lgl_oi.oi_fid),
1199 loghandle->lgh_id.lgl_ogen, cur_offset);
1200 GOTO(out, rc = -EINVAL);
1202 if (tail->lrt_index < prev_idx)
1205 /* sanity check that the start of the new buffer is no farther
1206 * than the record that we wanted. This shouldn't happen. */
1207 if (rec->lrh_index > prev_idx) {
1208 CERROR("%s: missed desired record? %u > %u\n",
1209 o->do_lu.lo_dev->ld_obd->obd_name,
1210 rec->lrh_index, prev_idx);
1211 GOTO(out, rc = -ENOENT);
1214 /* Trim unsupported extensions for compat w/ older clients */
1215 changelog_block_trim_ext(rec, last_rec, loghandle);
1219 GOTO(out, rc = -EIO);
1221 dt_read_unlock(env, o);
1226 * This is helper function to get llog directory object. It is used by named
1227 * llog operations to find/insert/delete llog entry from llog directory.
1229 * \param[in] env execution environment
1230 * \param[in] ctxt llog context
1232 * \retval dt_object of llog directory
1233 * \retval ERR_PTR of negative value on error
1235 static struct dt_object *llog_osd_dir_get(const struct lu_env *env,
1236 struct llog_ctxt *ctxt)
1238 struct dt_device *dt;
1239 struct dt_thread_info *dti = dt_info(env);
1240 struct dt_object *dir;
1243 dt = ctxt->loc_exp->exp_obd->obd_lvfs_ctxt.dt;
1244 if (ctxt->loc_dir == NULL) {
1245 rc = dt_root_get(env, dt, &dti->dti_fid);
1248 dir = dt_locate(env, dt, &dti->dti_fid);
1250 if (!IS_ERR(dir) && !dt_try_as_dir(env, dir)) {
1251 dt_object_put(env, dir);
1252 return ERR_PTR(-ENOTDIR);
1255 lu_object_get(&ctxt->loc_dir->do_lu);
1256 dir = ctxt->loc_dir;
1263 * Implementation of the llog_operations::lop_open
1265 * This function opens the llog by its logid or by name, it may open also
1266 * non existent llog and assing then new id to it.
1267 * The llog_open/llog_close pair works similar to lu_object_find/put,
1268 * the object may not exist prior open. The result of open is just dt_object
1269 * in the llog header.
1271 * \param[in] env execution environment
1272 * \param[in] handle llog handle of the current llog
1273 * \param[in] logid logid of llog to open (nameless llog)
1274 * \param[in] name name of llog to open (named llog)
1275 * \param[in] open_param
1276 * LLOG_OPEN_NEW - new llog, may not exist
1277 * LLOG_OPEN_EXIST - old llog, must exist
1279 * \retval 0 on successful open, llog_handle::lgh_obj
1280 * contains the dt_object of the llog.
1281 * \retval negative value on error
1283 static int llog_osd_open(const struct lu_env *env, struct llog_handle *handle,
1284 struct llog_logid *logid, char *name,
1285 enum llog_open_param open_param)
1287 struct llog_thread_info *lgi = llog_info(env);
1288 struct llog_ctxt *ctxt = handle->lgh_ctxt;
1289 struct dt_object *o;
1290 struct dt_device *dt;
1291 struct ls_device *ls;
1292 struct local_oid_storage *los = NULL;
1294 bool new_id = false;
1300 LASSERT(ctxt->loc_exp);
1301 LASSERT(ctxt->loc_exp->exp_obd);
1302 dt = ctxt->loc_exp->exp_obd->obd_lvfs_ctxt.dt;
1304 if (ctxt->loc_flags & LLOG_CTXT_FLAG_NORMAL_FID) {
1305 struct lu_object_conf conf = { 0 };
1306 if (logid != NULL) {
1307 logid_to_fid(logid, &lgi->lgi_fid);
1309 /* If logid == NULL, then it means the caller needs
1310 * to allocate new FID (llog_cat_declare_add_rec()). */
1311 rc = dt_fid_alloc(env, dt, &lgi->lgi_fid, NULL, NULL);
1315 conf.loc_flags = LOC_F_NEW;
1318 o = dt_locate_at(env, dt, &lgi->lgi_fid,
1319 dt->dd_lu_dev.ld_site->ls_top_dev, &conf);
1326 ls = ls_device_get(dt);
1328 RETURN(PTR_ERR(ls));
1330 mutex_lock(&ls->ls_los_mutex);
1331 los = dt_los_find(ls, name != NULL ? FID_SEQ_LLOG_NAME : FID_SEQ_LLOG);
1332 mutex_unlock(&ls->ls_los_mutex);
1334 ls_device_put(env, ls);
1338 if (logid != NULL) {
1339 logid_to_fid(logid, &lgi->lgi_fid);
1341 struct dt_object *llog_dir;
1343 llog_dir = llog_osd_dir_get(env, ctxt);
1344 if (IS_ERR(llog_dir))
1345 GOTO(out, rc = PTR_ERR(llog_dir));
1346 dt_read_lock(env, llog_dir, 0);
1347 rc = dt_lookup_dir(env, llog_dir, name, &lgi->lgi_fid);
1348 dt_read_unlock(env, llog_dir);
1349 dt_object_put(env, llog_dir);
1350 if (rc == -ENOENT && open_param == LLOG_OPEN_NEW) {
1351 /* generate fid for new llog */
1352 rc = local_object_fid_generate(env, los,
1358 OBD_ALLOC(handle->lgh_name, strlen(name) + 1);
1359 if (handle->lgh_name)
1360 strcpy(handle->lgh_name, name);
1362 GOTO(out, rc = -ENOMEM);
1364 LASSERTF(open_param & LLOG_OPEN_NEW, "%#x\n", open_param);
1365 /* generate fid for new llog */
1367 rc = local_object_fid_generate(env, los, &lgi->lgi_fid);
1372 if (OBD_FAIL_PRECHECK(OBD_FAIL_MDS_LLOG_UMOUNT_RACE) &&
1373 cfs_fail_val == 1) {
1375 OBD_RACE(OBD_FAIL_MDS_LLOG_UMOUNT_RACE);
1376 msleep(MSEC_PER_SEC);
1378 o = ls_locate(env, ls, &lgi->lgi_fid, NULL);
1380 GOTO(out_name, rc = PTR_ERR(o));
1382 if (dt_object_exists(o) && new_id) {
1383 /* llog exists with just generated ID, e.g. some old llog file
1384 * still is in use or is orphan, drop a warn and skip it. */
1385 CDEBUG(D_INFO, "%s: llog exists with the same FID: "DFID
1387 o->do_lu.lo_dev->ld_obd->obd_name,
1388 PFID(lu_object_fid(&o->do_lu)));
1389 dt_object_put(env, o);
1390 /* just skip this llog ID, we shouldn't delete it because we
1391 * don't know exactly what is its purpose and state. */
1396 /* No new llog is expected but doesn't exist */
1397 if (open_param != LLOG_OPEN_NEW && !dt_object_exists(o)) {
1398 CDEBUG(D_INFO, "%s: llog FID: "DFID" obj %p doesn`t exist\n",
1399 o->do_lu.lo_dev->ld_obd->obd_name,
1400 PFID(lu_object_fid(&o->do_lu)), o);
1401 GOTO(out_put, rc = -ENOENT);
1403 fid_to_logid(&lgi->lgi_fid, &handle->lgh_id);
1404 handle->lgh_obj = o;
1405 handle->private_data = los;
1406 LASSERT(handle->lgh_ctxt);
1411 dt_object_put(env, o);
1413 if (handle->lgh_name != NULL)
1414 OBD_FREE(handle->lgh_name, strlen(name) + 1);
1422 * Get dir for regular fid log object
1424 * Get directory for regular fid log object, and these regular fid log
1425 * object will be inserted under this directory, to satisfy the FS
1426 * consistency check, e2fsck etc.
1428 * \param [in] env execution environment
1429 * \param [in] dto llog object
1431 * \retval pointer to the directory if it is found.
1432 * \retval ERR_PTR(negative errno) if it fails.
1434 struct dt_object *llog_osd_get_regular_fid_dir(const struct lu_env *env,
1435 struct dt_object *dto)
1437 struct llog_thread_info *lgi = llog_info(env);
1438 struct seq_server_site *ss = dto->do_lu.lo_dev->ld_site->ld_seq_site;
1439 struct lu_seq_range *range = &lgi->lgi_range;
1440 struct lu_fid *dir_fid = &lgi->lgi_fid;
1441 struct dt_object *dir;
1445 fld_range_set_any(range);
1446 LASSERT(ss != NULL);
1447 rc = ss->ss_server_fld->lsf_seq_lookup(env, ss->ss_server_fld,
1448 fid_seq(lu_object_fid(&dto->do_lu)), range);
1450 RETURN(ERR_PTR(rc));
1452 lu_update_log_dir_fid(dir_fid, range->lsr_index);
1453 dir = dt_locate(env, lu2dt_dev(dto->do_lu.lo_dev), dir_fid);
1457 if (!dt_try_as_dir(env, dir)) {
1458 dt_object_put(env, dir);
1459 RETURN(ERR_PTR(-ENOTDIR));
1466 * Add llog object with regular FID to name entry
1468 * Add llog object with regular FID to name space, and each llog
1469 * object on each MDT will be /update_log_dir/[seq:oid:ver],
1470 * so to satisfy the namespace consistency check, e2fsck etc.
1472 * \param [in] env execution environment
1473 * \param [in] dto llog object
1474 * \param [in] th thandle
1475 * \param [in] declare if it is declare or execution
1477 * \retval 0 if insertion succeeds.
1478 * \retval negative errno if insertion fails.
1481 llog_osd_regular_fid_add_name_entry(const struct lu_env *env,
1482 struct dt_object *dto,
1483 struct thandle *th, bool declare)
1485 struct llog_thread_info *lgi = llog_info(env);
1486 const struct lu_fid *fid = lu_object_fid(&dto->do_lu);
1487 struct dt_insert_rec *rec = &lgi->lgi_dt_rec;
1488 struct dt_object *dir;
1489 char *name = lgi->lgi_name;
1493 if (!fid_is_norm(fid))
1496 dir = llog_osd_get_regular_fid_dir(env, dto);
1498 RETURN(PTR_ERR(dir));
1501 rec->rec_type = S_IFREG;
1502 snprintf(name, sizeof(lgi->lgi_name), DFID, PFID(fid));
1503 dt_write_lock(env, dir, 0);
1505 rc = dt_declare_insert(env, dir, (struct dt_rec *)rec,
1506 (struct dt_key *)name, th);
1508 rc = dt_insert(env, dir, (struct dt_rec *)rec,
1509 (struct dt_key *)name, th);
1511 dt_write_unlock(env, dir);
1513 dt_object_put(env, dir);
1519 * Implementation of the llog_operations::lop_declare_create
1521 * This function declares the llog create. It declares also name insert
1522 * into llog directory in case of named llog.
1524 * \param[in] env execution environment
1525 * \param[in] res llog handle of the current llog
1526 * \param[in] th current transaction handle
1528 * \retval 0 on successful create declaration
1529 * \retval negative value on error
1531 static int llog_osd_declare_create(const struct lu_env *env,
1532 struct llog_handle *res, struct thandle *th)
1534 struct llog_thread_info *lgi = llog_info(env);
1535 struct dt_insert_rec *rec = &lgi->lgi_dt_rec;
1536 struct local_oid_storage *los;
1537 struct dt_object *o;
1542 LASSERT(res->lgh_obj);
1545 /* object can be created by another thread */
1547 if (dt_object_exists(o))
1550 if (res->lgh_ctxt->loc_flags & LLOG_CTXT_FLAG_NORMAL_FID) {
1551 struct llog_thread_info *lgi = llog_info(env);
1553 lgi->lgi_attr.la_valid = LA_MODE | LA_SIZE;
1554 lgi->lgi_attr.la_size = 0;
1555 lgi->lgi_attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
1556 lgi->lgi_dof.dof_type = dt_mode_to_dft(S_IFREG);
1558 rc = dt_declare_create(env, o, &lgi->lgi_attr, NULL,
1564 rc = llog_osd_regular_fid_add_name_entry(env, o, th, true);
1568 los = res->private_data;
1571 rc = llog_osd_declare_new_object(env, los, o, th);
1575 /* do not declare header initialization here as it's declared
1576 * in llog_osd_declare_write_rec() which is always called */
1578 if (res->lgh_name) {
1579 struct dt_object *llog_dir;
1581 llog_dir = llog_osd_dir_get(env, res->lgh_ctxt);
1582 if (IS_ERR(llog_dir))
1583 RETURN(PTR_ERR(llog_dir));
1584 logid_to_fid(&res->lgh_id, &lgi->lgi_fid);
1585 rec->rec_fid = &lgi->lgi_fid;
1586 rec->rec_type = S_IFREG;
1587 rc = dt_declare_insert(env, llog_dir,
1588 (struct dt_rec *)rec,
1589 (struct dt_key *)res->lgh_name, th);
1590 dt_object_put(env, llog_dir);
1592 CERROR("%s: can't declare named llog %s: rc = %d\n",
1593 o->do_lu.lo_dev->ld_obd->obd_name,
1600 * Implementation of the llog_operations::lop_create
1602 * This function creates the llog according with llog_handle::lgh_obj
1603 * and llog_handle::lgh_name.
1605 * \param[in] env execution environment
1606 * \param[in] res llog handle of the current llog
1607 * \param[in] th current transaction handle
1609 * \retval 0 on successful create
1610 * \retval negative value on error
1612 static int llog_osd_create(const struct lu_env *env, struct llog_handle *res,
1615 struct llog_thread_info *lgi = llog_info(env);
1616 struct dt_insert_rec *rec = &lgi->lgi_dt_rec;
1617 struct local_oid_storage *los;
1618 struct dt_object *o;
1627 /* llog can be already created */
1628 if (dt_object_exists(o))
1631 if (res->lgh_ctxt->loc_flags & LLOG_CTXT_FLAG_NORMAL_FID) {
1632 struct llog_thread_info *lgi = llog_info(env);
1634 lgi->lgi_attr.la_valid = LA_MODE | LA_SIZE | LA_TYPE;
1635 lgi->lgi_attr.la_size = 0;
1636 lgi->lgi_attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
1637 lgi->lgi_dof.dof_type = dt_mode_to_dft(S_IFREG);
1639 dt_write_lock(env, o, 0);
1640 rc = dt_create(env, o, &lgi->lgi_attr, NULL,
1642 dt_write_unlock(env, o);
1646 rc = llog_osd_regular_fid_add_name_entry(env, o, th, false);
1651 los = res->private_data;
1654 dt_write_lock(env, o, 0);
1655 if (!dt_object_exists(o))
1656 rc = llog_osd_create_new_object(env, los, o, th);
1660 dt_write_unlock(env, o);
1664 if (res->lgh_name) {
1665 struct dt_object *llog_dir;
1667 llog_dir = llog_osd_dir_get(env, res->lgh_ctxt);
1668 if (IS_ERR(llog_dir))
1669 RETURN(PTR_ERR(llog_dir));
1671 logid_to_fid(&res->lgh_id, &lgi->lgi_fid);
1672 rec->rec_fid = &lgi->lgi_fid;
1673 rec->rec_type = S_IFREG;
1674 dt_read_lock(env, llog_dir, 0);
1675 rc = dt_insert(env, llog_dir, (struct dt_rec *)rec,
1676 (struct dt_key *)res->lgh_name, th);
1677 dt_read_unlock(env, llog_dir);
1678 dt_object_put(env, llog_dir);
1680 CERROR("%s: can't create named llog %s: rc = %d\n",
1681 o->do_lu.lo_dev->ld_obd->obd_name,
1688 * Implementation of the llog_operations::lop_close
1690 * This function closes the llog. It just put llog object and referenced
1693 * \param[in] env execution environment
1694 * \param[in] handle llog handle of the current llog
1696 * \retval 0 on successful llog close
1697 * \retval negative value on error
1699 static int llog_osd_close(const struct lu_env *env, struct llog_handle *handle)
1701 struct local_oid_storage *los;
1706 LASSERT(handle->lgh_obj);
1708 if (handle->lgh_ctxt->loc_flags & LLOG_CTXT_FLAG_NORMAL_FID) {
1709 /* Remove the object from the cache, otherwise it may
1710 * hold LOD being released during cleanup process */
1711 dt_object_put_nocache(env, handle->lgh_obj);
1712 LASSERT(handle->private_data == NULL);
1715 dt_object_put(env, handle->lgh_obj);
1717 los = handle->private_data;
1721 if (handle->lgh_name)
1722 OBD_FREE(handle->lgh_name, strlen(handle->lgh_name) + 1);
1728 * delete llog object name entry
1730 * Delete llog object (with regular FID) from name space (under
1733 * \param [in] env execution environment
1734 * \param [in] dto llog object
1735 * \param [in] th thandle
1736 * \param [in] declare if it is declare or execution
1738 * \retval 0 if deletion succeeds.
1739 * \retval negative errno if deletion fails.
1742 llog_osd_regular_fid_del_name_entry(const struct lu_env *env,
1743 struct dt_object *dto,
1744 struct thandle *th, bool declare)
1746 struct llog_thread_info *lgi = llog_info(env);
1747 const struct lu_fid *fid = lu_object_fid(&dto->do_lu);
1748 struct dt_object *dir;
1749 char *name = lgi->lgi_name;
1753 if (!fid_is_norm(fid))
1756 dir = llog_osd_get_regular_fid_dir(env, dto);
1758 RETURN(PTR_ERR(dir));
1760 snprintf(name, sizeof(lgi->lgi_name), DFID, PFID(fid));
1761 dt_write_lock(env, dir, 0);
1763 rc = dt_declare_delete(env, dir, (struct dt_key *)name,
1766 rc = dt_delete(env, dir, (struct dt_key *)name, th);
1768 dt_write_unlock(env, dir);
1770 dt_object_put(env, dir);
1775 * Implementation of the llog_operations::lop_declare_destroy
1777 * This function declare destroys the llog and deletes also entry in the
1778 * llog directory in case of named llog. Llog should be opened prior that.
1780 * \param[in] env execution environment
1781 * \param[in] loghandle llog handle of the current llog
1783 * \retval 0 on successful destroy
1784 * \retval negative value on error
1786 static int llog_osd_declare_destroy(const struct lu_env *env,
1787 struct llog_handle *loghandle,
1790 struct llog_ctxt *ctxt;
1791 struct dt_object *o, *llog_dir = NULL;
1796 ctxt = loghandle->lgh_ctxt;
1799 o = loghandle->lgh_obj;
1802 if (loghandle->lgh_name) {
1803 llog_dir = llog_osd_dir_get(env, ctxt);
1804 if (IS_ERR(llog_dir))
1805 RETURN(PTR_ERR(llog_dir));
1807 rc = dt_declare_delete(env, llog_dir,
1808 (struct dt_key *)loghandle->lgh_name,
1814 rc = dt_declare_ref_del(env, o, th);
1818 rc = dt_declare_destroy(env, o, th);
1822 if (loghandle->lgh_ctxt->loc_flags & LLOG_CTXT_FLAG_NORMAL_FID) {
1823 rc = llog_osd_regular_fid_del_name_entry(env, o, th, true);
1829 if (!(IS_ERR_OR_NULL(llog_dir)))
1830 dt_object_put(env, llog_dir);
1837 * Implementation of the llog_operations::lop_destroy
1839 * This function destroys the llog and deletes also entry in the
1840 * llog directory in case of named llog. Llog should be opened prior that.
1841 * Destroy method is not part of external transaction and does everything
1844 * \param[in] env execution environment
1845 * \param[in] loghandle llog handle of the current llog
1847 * \retval 0 on successful destroy
1848 * \retval negative value on error
1850 static int llog_osd_destroy(const struct lu_env *env,
1851 struct llog_handle *loghandle, struct thandle *th)
1853 struct llog_ctxt *ctxt;
1854 struct dt_object *o, *llog_dir = NULL;
1859 ctxt = loghandle->lgh_ctxt;
1860 LASSERT(ctxt != NULL);
1862 o = loghandle->lgh_obj;
1865 dt_write_lock(env, o, 0);
1866 if (!llog_osd_exist(loghandle))
1867 GOTO(out_unlock, rc = 0);
1869 if (loghandle->lgh_name) {
1870 llog_dir = llog_osd_dir_get(env, ctxt);
1871 if (IS_ERR(llog_dir))
1872 GOTO(out_unlock, rc = PTR_ERR(llog_dir));
1874 dt_read_lock(env, llog_dir, 0);
1875 rc = dt_delete(env, llog_dir,
1876 (struct dt_key *)loghandle->lgh_name,
1878 dt_read_unlock(env, llog_dir);
1880 CERROR("%s: can't remove llog %s: rc = %d\n",
1881 o->do_lu.lo_dev->ld_obd->obd_name,
1882 loghandle->lgh_name, rc);
1883 GOTO(out_unlock, rc);
1887 dt_ref_del(env, o, th);
1888 rc = dt_destroy(env, o, th);
1890 GOTO(out_unlock, rc);
1892 loghandle->lgh_destroyed = true;
1893 if (loghandle->lgh_ctxt->loc_flags & LLOG_CTXT_FLAG_NORMAL_FID) {
1894 rc = llog_osd_regular_fid_del_name_entry(env, o, th, false);
1896 GOTO(out_unlock, rc);
1900 dt_write_unlock(env, o);
1901 if (!(IS_ERR_OR_NULL(llog_dir)))
1902 dt_object_put(env, llog_dir);
1907 * Implementation of the llog_operations::lop_setup
1909 * This function setup the llog on local storage.
1911 * \param[in] env execution environment
1912 * \param[in] obd obd device the llog belongs to
1913 * \param[in] olg the llog group, it is always zero group now.
1914 * \param[in] ctxt_idx the llog index, it defines the purpose of this llog.
1915 * Every new llog type have to use own index.
1916 * \param[in] disk_obd the storage obd, where llog is stored.
1918 * \retval 0 on successful llog setup
1919 * \retval negative value on error
1921 static int llog_osd_setup(const struct lu_env *env, struct obd_device *obd,
1922 struct obd_llog_group *olg, int ctxt_idx,
1923 struct obd_device *disk_obd)
1925 struct llog_thread_info *lgi = llog_info(env);
1926 struct llog_ctxt *ctxt;
1931 LASSERT(olg->olg_ctxts[ctxt_idx]);
1933 ctxt = llog_ctxt_get(olg->olg_ctxts[ctxt_idx]);
1936 if (disk_obd == NULL)
1939 /* initialize data allowing to generate new fids,
1940 * literally we need a sequece */
1941 lgi->lgi_fid.f_seq = FID_SEQ_LLOG;
1942 lgi->lgi_fid.f_oid = 1;
1943 lgi->lgi_fid.f_ver = 0;
1944 rc = local_oid_storage_init(env, disk_obd->obd_lvfs_ctxt.dt,
1946 &ctxt->loc_los_nameless);
1950 lgi->lgi_fid.f_seq = FID_SEQ_LLOG_NAME;
1951 lgi->lgi_fid.f_oid = 1;
1952 lgi->lgi_fid.f_ver = 0;
1953 rc = local_oid_storage_init(env, disk_obd->obd_lvfs_ctxt.dt,
1955 &ctxt->loc_los_named);
1957 local_oid_storage_fini(env, ctxt->loc_los_nameless);
1958 ctxt->loc_los_nameless = NULL;
1964 llog_ctxt_put(ctxt);
1969 * Implementation of the llog_operations::lop_cleanup
1971 * This function cleanups the llog on local storage.
1973 * \param[in] env execution environment
1974 * \param[in] ctxt the llog context
1978 static int llog_osd_cleanup(const struct lu_env *env, struct llog_ctxt *ctxt)
1980 if (ctxt->loc_los_nameless != NULL) {
1981 local_oid_storage_fini(env, ctxt->loc_los_nameless);
1982 ctxt->loc_los_nameless = NULL;
1985 if (ctxt->loc_los_named != NULL) {
1986 local_oid_storage_fini(env, ctxt->loc_los_named);
1987 ctxt->loc_los_named = NULL;
1993 const struct llog_operations llog_osd_ops = {
1994 .lop_next_block = llog_osd_next_block,
1995 .lop_prev_block = llog_osd_prev_block,
1996 .lop_read_header = llog_osd_read_header,
1997 .lop_declare_destroy = llog_osd_declare_destroy,
1998 .lop_destroy = llog_osd_destroy,
1999 .lop_setup = llog_osd_setup,
2000 .lop_cleanup = llog_osd_cleanup,
2001 .lop_open = llog_osd_open,
2002 .lop_exist = llog_osd_exist,
2003 .lop_declare_create = llog_osd_declare_create,
2004 .lop_create = llog_osd_create,
2005 .lop_declare_write_rec = llog_osd_declare_write_rec,
2006 .lop_write_rec = llog_osd_write_rec,
2007 .lop_close = llog_osd_close,
2009 EXPORT_SYMBOL(llog_osd_ops);
2011 const struct llog_operations llog_common_cat_ops = {
2012 .lop_next_block = llog_osd_next_block,
2013 .lop_prev_block = llog_osd_prev_block,
2014 .lop_read_header = llog_osd_read_header,
2015 .lop_declare_destroy = llog_osd_declare_destroy,
2016 .lop_destroy = llog_osd_destroy,
2017 .lop_setup = llog_osd_setup,
2018 .lop_cleanup = llog_osd_cleanup,
2019 .lop_open = llog_osd_open,
2020 .lop_exist = llog_osd_exist,
2021 .lop_declare_create = llog_osd_declare_create,
2022 .lop_create = llog_osd_create,
2023 .lop_declare_write_rec = llog_osd_declare_write_rec,
2024 .lop_write_rec = llog_osd_write_rec,
2025 .lop_close = llog_osd_close,
2026 .lop_add = llog_cat_add_rec,
2027 .lop_declare_add = llog_cat_declare_add_rec,
2029 EXPORT_SYMBOL(llog_common_cat_ops);
2032 * Read the special file which contains the list of llog catalogs IDs
2034 * This function reads the CATALOGS file which contains the array of llog
2035 * catalogs IDs. The main purpose of this file is to store OSP llogs indexed
2036 * by OST/MDT number.
2038 * \param[in] env execution environment
2039 * \param[in] d corresponding storage device
2040 * \param[in] idx position to start from, usually OST/MDT index
2041 * \param[in] count how many catalog IDs to read
2042 * \param[out] idarray the buffer for the data. If it is NULL then
2043 * function returns just number of catalog IDs
2045 * \param[in] fid LLOG_CATALOGS_OID for CATALOG object
2047 * \retval 0 on successful read of catalog IDs
2048 * \retval negative value on error
2049 * \retval positive value which is number of records in
2050 * the file if \a idarray is NULL
2052 int llog_osd_get_cat_list(const struct lu_env *env, struct dt_device *d,
2053 int idx, int count, struct llog_catid *idarray,
2054 const struct lu_fid *fid)
2056 struct llog_thread_info *lgi = llog_info(env);
2057 struct dt_object *o = NULL;
2065 size = sizeof(*idarray) * count;
2066 lgi->lgi_off = idx * sizeof(*idarray);
2068 lgi->lgi_fid = *fid;
2069 o = dt_locate(env, d, &lgi->lgi_fid);
2073 if (!dt_object_exists(o)) {
2074 th = dt_trans_create(env, d);
2076 GOTO(out, rc = PTR_ERR(th));
2078 lgi->lgi_attr.la_valid = LA_MODE | LA_TYPE;
2079 lgi->lgi_attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
2080 lgi->lgi_dof.dof_type = dt_mode_to_dft(S_IFREG);
2082 th->th_wait_submit = 1;
2083 /* Make the llog object creation synchronization, so
2084 * it will be reliable to the reference, especially
2085 * for remote reference */
2088 rc = dt_declare_create(env, o, &lgi->lgi_attr, NULL,
2091 GOTO(out_trans, rc);
2093 rc = dt_trans_start_local(env, d, th);
2095 GOTO(out_trans, rc);
2097 dt_write_lock(env, o, 0);
2098 if (!dt_object_exists(o))
2099 rc = dt_create(env, o, &lgi->lgi_attr, NULL,
2101 dt_write_unlock(env, o);
2103 dt_trans_stop(env, d, th);
2108 rc = dt_attr_get(env, o, &lgi->lgi_attr);
2112 if (!S_ISREG(lgi->lgi_attr.la_mode)) {
2113 CERROR("%s: CATALOGS is not a regular file!: mode = %o\n",
2114 o->do_lu.lo_dev->ld_obd->obd_name,
2115 lgi->lgi_attr.la_mode);
2116 GOTO(out, rc = -ENOENT);
2119 CDEBUG(D_CONFIG, "cat list: disk size=%d, read=%d\n",
2120 (int)lgi->lgi_attr.la_size, size);
2122 /* return just number of llogs */
2123 if (idarray == NULL) {
2124 rc = lgi->lgi_attr.la_size / sizeof(*idarray);
2128 /* read for new ost index or for empty file */
2129 memset(idarray, 0, size);
2130 if (lgi->lgi_attr.la_size <= lgi->lgi_off)
2132 if (lgi->lgi_attr.la_size < lgi->lgi_off + size)
2133 size = lgi->lgi_attr.la_size - lgi->lgi_off;
2135 lgi->lgi_buf.lb_buf = idarray;
2136 lgi->lgi_buf.lb_len = size;
2137 rc = dt_record_read(env, o, &lgi->lgi_buf, &lgi->lgi_off);
2138 /* -EFAULT means the llog is a sparse file. This is not an error
2139 * after arbitrary OST index is supported. */
2140 if (rc < 0 && rc != -EFAULT) {
2141 CERROR("%s: error reading CATALOGS: rc = %d\n",
2142 o->do_lu.lo_dev->ld_obd->obd_name, rc);
2148 dt_object_put(env, o);
2151 EXPORT_SYMBOL(llog_osd_get_cat_list);
2154 * Write the special file which contains the list of llog catalogs IDs
2156 * This function writes the CATALOG file which contains the array of llog
2157 * catalogs IDs. It is used mostly to store OSP llogs indexed by OST/MDT
2160 * \param[in] env execution environment
2161 * \param[in] d corresponding storage device
2162 * \param[in] idx position to start from, usually OST/MDT index
2163 * \param[in] count how many catalog IDs to write
2164 * \param[out] idarray the buffer with the data to write.
2165 * \param[in] fid LLOG_CATALOGS_OID for CATALOG object
2167 * \retval 0 on successful write of catalog IDs
2168 * \retval negative value on error
2170 int llog_osd_put_cat_list(const struct lu_env *env, struct dt_device *d,
2171 int idx, int count, struct llog_catid *idarray,
2172 const struct lu_fid *fid)
2174 struct llog_thread_info *lgi = llog_info(env);
2175 struct dt_object *o = NULL;
2184 size = sizeof(*idarray) * count;
2185 lgi->lgi_off = idx * sizeof(*idarray);
2186 lgi->lgi_fid = *fid;
2188 o = dt_locate(env, d, &lgi->lgi_fid);
2192 if (!dt_object_exists(o))
2193 GOTO(out, rc = -ENOENT);
2195 rc = dt_attr_get(env, o, &lgi->lgi_attr);
2199 if (!S_ISREG(lgi->lgi_attr.la_mode)) {
2200 CERROR("%s: CATALOGS is not a regular file!: mode = %o\n",
2201 o->do_lu.lo_dev->ld_obd->obd_name,
2202 lgi->lgi_attr.la_mode);
2203 GOTO(out, rc = -ENOENT);
2206 th = dt_trans_create(env, d);
2208 GOTO(out, rc = PTR_ERR(th));
2210 lgi->lgi_buf.lb_len = size;
2211 lgi->lgi_buf.lb_buf = idarray;
2212 rc = dt_declare_record_write(env, o, &lgi->lgi_buf, lgi->lgi_off, th);
2214 GOTO(out_trans, rc);
2216 /* For update log, this happens during initialization,
2217 * see lod_sub_prep_llog(), and we need make sure catlog
2218 * file ID is written to catlist file(committed) before
2219 * cross-MDT operation write update records to catlog FILE,
2220 * otherwise, during failover these update records might
2222 if (fid_is_update_log(fid))
2225 rc = dt_trans_start_local(env, d, th);
2227 GOTO(out_trans, rc);
2229 th->th_wait_submit = 1;
2231 rc = dt_record_write(env, o, &lgi->lgi_buf, &lgi->lgi_off, th);
2233 CDEBUG(D_INODE, "can't write CATALOGS at index %d: rc = %d\n",
2236 dt_trans_stop(env, d, th);
2238 dt_object_put(env, o);
2241 EXPORT_SYMBOL(llog_osd_put_cat_list);