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, 2014 Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
33 * lustre/obdclass/llog_osd.c
35 * Low level llog routines on top of OSD API
37 * This file provides set of methods for llog operations on top of
38 * dt_device. It contains all supported llog_operations interfaces and
39 * supplimental functions.
41 * Author: Alexey Zhuravlev <alexey.zhuravlev@intel.com>
42 * Author: Mikhail Pershin <mike.pershin@intel.com>
45 #define DEBUG_SUBSYSTEM S_LOG
48 #include <obd_class.h>
49 #include <lustre_fid.h>
50 #include <dt_object.h>
52 #include "llog_internal.h"
53 #include "local_storage.h"
56 * Implementation of the llog_operations::lop_declare_create
58 * This function is a wrapper over local_storage API function
59 * local_object_declare_create().
61 * \param[in] env execution environment
62 * \param[in] los local_storage for bottom storage device
63 * \param[in] o dt_object to create
64 * \param[in] th current transaction handle
66 * \retval 0 on successful declaration of the new object
67 * \retval negative error if declaration was failed
69 static int llog_osd_declare_new_object(const struct lu_env *env,
70 struct local_oid_storage *los,
74 struct llog_thread_info *lgi = llog_info(env);
76 lgi->lgi_attr.la_valid = LA_MODE;
77 lgi->lgi_attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
78 lgi->lgi_dof.dof_type = dt_mode_to_dft(S_IFREG);
80 return local_object_declare_create(env, los, o, &lgi->lgi_attr,
85 * Implementation of the llog_operations::lop_create
87 * This function is a wrapper over local_storage API function
88 * local_object_create().
90 * \param[in] env execution environment
91 * \param[in] los local_storage for bottom storage device
92 * \param[in] o dt_object to create
93 * \param[in] th current transaction handle
95 * \retval 0 on successful creation of the new object
96 * \retval negative error if creation was failed
98 static int llog_osd_create_new_object(const struct lu_env *env,
99 struct local_oid_storage *los,
103 struct llog_thread_info *lgi = llog_info(env);
105 lgi->lgi_attr.la_valid = LA_MODE;
106 lgi->lgi_attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
107 lgi->lgi_dof.dof_type = dt_mode_to_dft(S_IFREG);
109 return local_object_create(env, los, o, &lgi->lgi_attr,
114 * Write a padding record to the llog
116 * This function writes a padding record to the end of llog. That may
117 * be needed if llog contains records of variable size, e.g. config logs
119 * The padding record just aligns llog to the LLOG_CHUNK_SIZE boundary if
120 * the current record doesn't fit in the remaining space.
122 * It allocates full length to avoid two separate writes for header and tail.
123 * Such 2-steps scheme needs extra protection and complex error handling.
125 * \param[in] env execution environment
126 * \param[in] o dt_object to create
127 * \param[in,out] off pointer to the padding start offset
128 * \param[in] len padding length
129 * \param[in] index index of the padding record in a llog
130 * \param[in] th current transaction handle
132 * \retval 0 on successful padding write
133 * \retval negative error if write failed
135 static int llog_osd_pad(const struct lu_env *env, struct dt_object *o,
136 loff_t *off, int len, int index, struct thandle *th)
138 struct llog_thread_info *lgi = llog_info(env);
139 struct llog_rec_hdr *rec;
140 struct llog_rec_tail *tail;
147 LASSERT(len >= LLOG_MIN_REC_SIZE && (len & 0x7) == 0);
154 rec->lrh_index = index;
155 rec->lrh_type = LLOG_PAD_MAGIC;
157 tail = rec_tail(rec);
159 tail->lrt_index = index;
161 lgi->lgi_buf.lb_buf = rec;
162 lgi->lgi_buf.lb_len = len;
163 rc = dt_record_write(env, o, &lgi->lgi_buf, off, th);
165 CERROR("%s: error writing padding record: rc = %d\n",
166 o->do_lu.lo_dev->ld_obd->obd_name, rc);
173 * Implementation of the llog_operations::lop_read_header
175 * This function reads the current llog header from the bottom storage
178 * \param[in] env execution environment
179 * \param[in] handle llog handle of the current llog
181 * \retval 0 on successful header read
182 * \retval negative error if read failed
184 static int llog_osd_read_header(const struct lu_env *env,
185 struct llog_handle *handle)
187 struct llog_rec_hdr *llh_hdr;
189 struct llog_thread_info *lgi;
190 enum llog_flag flags;
195 LASSERT(sizeof(*handle->lgh_hdr) == LLOG_CHUNK_SIZE);
200 lgi = llog_info(env);
202 rc = dt_attr_get(env, o, &lgi->lgi_attr);
206 LASSERT(lgi->lgi_attr.la_valid & LA_SIZE);
208 if (lgi->lgi_attr.la_size == 0) {
209 CDEBUG(D_HA, "not reading header from 0-byte log\n");
213 flags = handle->lgh_hdr->llh_flags;
216 lgi->lgi_buf.lb_buf = handle->lgh_hdr;
217 lgi->lgi_buf.lb_len = LLOG_CHUNK_SIZE;
219 rc = dt_record_read(env, o, &lgi->lgi_buf, &lgi->lgi_off);
221 CERROR("%s: error reading log header from "DFID": rc = %d\n",
222 o->do_lu.lo_dev->ld_obd->obd_name,
223 PFID(lu_object_fid(&o->do_lu)), rc);
227 llh_hdr = &handle->lgh_hdr->llh_hdr;
228 if (LLOG_REC_HDR_NEEDS_SWABBING(llh_hdr))
229 lustre_swab_llog_hdr(handle->lgh_hdr);
231 if (llh_hdr->lrh_type != LLOG_HDR_MAGIC) {
232 CERROR("%s: bad log %s "DFID" header magic: %#x "
233 "(expected %#x)\n", o->do_lu.lo_dev->ld_obd->obd_name,
234 handle->lgh_name ? handle->lgh_name : "",
235 PFID(lu_object_fid(&o->do_lu)),
236 llh_hdr->lrh_type, LLOG_HDR_MAGIC);
238 } else if (llh_hdr->lrh_len != LLOG_CHUNK_SIZE) {
239 CERROR("%s: incorrectly sized log %s "DFID" header: "
240 "%#x (expected %#x)\n"
241 "you may need to re-run lconf --write_conf.\n",
242 o->do_lu.lo_dev->ld_obd->obd_name,
243 handle->lgh_name ? handle->lgh_name : "",
244 PFID(lu_object_fid(&o->do_lu)),
245 llh_hdr->lrh_len, LLOG_CHUNK_SIZE);
249 handle->lgh_hdr->llh_flags |= (flags & LLOG_F_EXT_MASK);
250 handle->lgh_last_idx = handle->lgh_hdr->llh_tail.lrt_index;
256 * Implementation of the llog_operations::lop_declare_write
258 * This function declares the new record write.
260 * \param[in] env execution environment
261 * \param[in] loghandle llog handle of the current llog
262 * \param[in] rec llog record header. This is a real header of the full
263 * llog record to write. This is the beginning of buffer
264 * to write, the length of buffer is stored in
266 * \param[in] idx index of the llog record. If \a idx == -1 then this is
267 * append case, otherwise \a idx is the index of record
269 * \param[in] th current transaction handle
271 * \retval 0 on successful declaration
272 * \retval negative error if declaration failed
274 static int llog_osd_declare_write_rec(const struct lu_env *env,
275 struct llog_handle *loghandle,
276 struct llog_rec_hdr *rec,
277 int idx, struct thandle *th)
279 struct llog_thread_info *lgi = llog_info(env);
289 LASSERT(rec->lrh_len <= LLOG_CHUNK_SIZE);
291 o = loghandle->lgh_obj;
294 lgi->lgi_buf.lb_len = sizeof(struct llog_log_hdr);
295 lgi->lgi_buf.lb_buf = NULL;
296 /* each time we update header */
297 rc = dt_declare_record_write(env, o, &lgi->lgi_buf, 0,
299 if (rc || idx == 0) /* if error or just header */
303 * the pad record can be inserted so take into account double
306 lgi->lgi_buf.lb_len = rec->lrh_len * 2;
307 lgi->lgi_buf.lb_buf = NULL;
308 /* XXX: implement declared window or multi-chunks approach */
309 rc = dt_declare_record_write(env, o, &lgi->lgi_buf, -1, th);
315 * Implementation of the llog_operations::lop_write
317 * This function writes the new record in the llog or modify the existed one.
319 * \param[in] env execution environment
320 * \param[in] loghandle llog handle of the current llog
321 * \param[in] rec llog record header. This is a real header of
322 * the full llog record to write. This is
323 * the beginning of buffer to write, the length
324 * of buffer is stored in \a rec::lrh_len
325 * \param[out] reccookie pointer to the cookie to return back if needed.
326 * It is used for further cancel of this llog
328 * \param[in] idx index of the llog record. If \a idx == -1 then
329 * this is append case, otherwise \a idx is
330 * the index of record to modify
331 * \param[in] th current transaction handle
333 * \retval 0 on successful write && \a reccookie == NULL
334 * 1 on successful write && \a reccookie != NULL
335 * \retval negative error if write failed
337 static int llog_osd_write_rec(const struct lu_env *env,
338 struct llog_handle *loghandle,
339 struct llog_rec_hdr *rec,
340 struct llog_cookie *reccookie,
341 int idx, struct thandle *th)
343 struct llog_thread_info *lgi = llog_info(env);
344 struct llog_log_hdr *llh;
345 int reclen = rec->lrh_len;
347 struct llog_rec_tail *lrt;
354 llh = loghandle->lgh_hdr;
356 o = loghandle->lgh_obj;
360 CDEBUG(D_OTHER, "new record %x to "DFID"\n",
361 rec->lrh_type, PFID(lu_object_fid(&o->do_lu)));
363 /* record length should not bigger than LLOG_CHUNK_SIZE */
364 if (reclen > LLOG_CHUNK_SIZE)
367 rc = dt_attr_get(env, o, &lgi->lgi_attr);
372 * The modification case.
373 * If idx set then the record with that index must be modified.
374 * There are three cases possible:
375 * 1) the common case is the llog header update (idx == 0)
376 * 2) the llog record modification during llog process.
377 * This is indicated by the \a loghandle::lgh_cur_idx > 0.
378 * In that case the \a loghandle::lgh_cur_offset
379 * 3) otherwise this is assumed that llog consist of records of
380 * fixed size, i.e. catalog. The llog header must has llh_size
381 * field equal to record size. The record offset is calculated
382 * just by /a idx value
384 * During modification we don't need extra header update because
385 * the bitmap and record count are not changed. The record header
386 * and tail remains the same too.
388 if (idx != LLOG_NEXT_IDX) {
389 /* llog can be empty only when first record is being written */
390 LASSERT(ergo(idx > 0, lgi->lgi_attr.la_size > 0));
392 if (!ext2_test_bit(idx, llh->llh_bitmap)) {
393 CERROR("%s: modify unset record %u\n",
394 o->do_lu.lo_dev->ld_obd->obd_name, idx);
398 if (idx != rec->lrh_index) {
399 CERROR("%s: modify index mismatch %d %u\n",
400 o->do_lu.lo_dev->ld_obd->obd_name, idx,
405 if (idx == LLOG_HEADER_IDX) {
406 /* llog header update */
407 LASSERT(reclen == sizeof(struct llog_log_hdr));
408 LASSERT(rec == &llh->llh_hdr);
411 lgi->lgi_buf.lb_len = reclen;
412 lgi->lgi_buf.lb_buf = rec;
413 rc = dt_record_write(env, o, &lgi->lgi_buf,
416 } else if (loghandle->lgh_cur_idx > 0) {
418 * The lgh_cur_offset can be used only if index is
421 if (idx != loghandle->lgh_cur_idx) {
422 CERROR("%s: modify index mismatch %d %d\n",
423 o->do_lu.lo_dev->ld_obd->obd_name, idx,
424 loghandle->lgh_cur_idx);
428 lgi->lgi_off = loghandle->lgh_cur_offset;
429 CDEBUG(D_OTHER, "modify record "DOSTID": idx:%d, "
430 "len:%u offset %llu\n",
431 POSTID(&loghandle->lgh_id.lgl_oi), idx,
432 rec->lrh_len, (long long)lgi->lgi_off);
433 } else if (llh->llh_size > 0) {
434 if (llh->llh_size != rec->lrh_len) {
435 CERROR("%s: wrong record size, llh_size is %u"
436 " but record size is %u\n",
437 o->do_lu.lo_dev->ld_obd->obd_name,
438 llh->llh_size, rec->lrh_len);
441 lgi->lgi_off = sizeof(*llh) + (idx - 1) * reclen;
443 /* This can be result of lgh_cur_idx is not set during
444 * llog processing or llh_size is not set to proper
445 * record size for fixed records llog. Therefore it is
446 * impossible to get record offset. */
447 CERROR("%s: can't get record offset, idx:%d, "
448 "len:%u.\n", o->do_lu.lo_dev->ld_obd->obd_name,
453 /* update only data, header and tail remain the same */
454 lgi->lgi_off += sizeof(struct llog_rec_hdr);
455 lgi->lgi_buf.lb_len = REC_DATA_LEN(rec);
456 lgi->lgi_buf.lb_buf = REC_DATA(rec);
457 rc = dt_record_write(env, o, &lgi->lgi_buf, &lgi->lgi_off, th);
458 if (rc == 0 && reccookie) {
459 reccookie->lgc_lgl = loghandle->lgh_id;
460 reccookie->lgc_index = idx;
468 * The most common case of using llog. The new index is assigned to
469 * the new record, new bit is set in llog bitmap and llog count is
472 * Make sure that records don't cross a chunk boundary, so we can
473 * process them page-at-a-time if needed. If it will cross a chunk
474 * boundary, write in a fake (but referenced) entry to pad the chunk.
476 LASSERT(lgi->lgi_attr.la_valid & LA_SIZE);
477 lgi->lgi_off = lgi->lgi_attr.la_size;
478 left = LLOG_CHUNK_SIZE - (lgi->lgi_off & (LLOG_CHUNK_SIZE - 1));
479 /* NOTE: padding is a record, but no bit is set */
480 if (left != 0 && left != reclen &&
481 left < (reclen + LLOG_MIN_REC_SIZE)) {
482 index = loghandle->lgh_last_idx + 1;
483 rc = llog_osd_pad(env, o, &lgi->lgi_off, left, index, th);
486 loghandle->lgh_last_idx++; /* for pad rec */
488 /* if it's the last idx in log file, then return -ENOSPC */
489 if (loghandle->lgh_last_idx >= LLOG_BITMAP_SIZE(llh) - 1)
492 /* increment the last_idx along with llh_tail index, they should
493 * be equal for a llog lifetime */
494 loghandle->lgh_last_idx++;
495 index = loghandle->lgh_last_idx;
496 llh->llh_tail.lrt_index = index;
498 * NB: the caller should make sure only 1 process access
499 * the lgh_last_idx, e.g. append should be exclusive.
500 * Otherwise it might hit the assert.
502 LASSERT(index < LLOG_BITMAP_SIZE(llh));
503 rec->lrh_index = index;
505 lrt->lrt_len = rec->lrh_len;
506 lrt->lrt_index = rec->lrh_index;
508 /* the lgh_hdr_lock protects llog header data from concurrent
509 * update/cancel, the llh_count and llh_bitmap are protected */
510 spin_lock(&loghandle->lgh_hdr_lock);
511 if (ext2_set_bit(index, llh->llh_bitmap)) {
512 CERROR("%s: index %u already set in log bitmap\n",
513 o->do_lu.lo_dev->ld_obd->obd_name, index);
514 spin_unlock(&loghandle->lgh_hdr_lock);
515 LBUG(); /* should never happen */
518 spin_unlock(&loghandle->lgh_hdr_lock);
520 if (lgi->lgi_attr.la_size == 0) {
522 lgi->lgi_buf.lb_len = llh->llh_hdr.lrh_len;
523 lgi->lgi_buf.lb_buf = &llh->llh_hdr;
524 rc = dt_record_write(env, o, &lgi->lgi_buf, &lgi->lgi_off, th);
528 /* Note: If this is not initialization (size == 0), then do not
529 * write the whole header (8k bytes), only update header/tail
530 * and bits needs to be updated. Because this update might be
531 * part of cross-MDT operation, which needs to write these
532 * updates into the update log(32KB limit) and also pack inside
533 * the RPC (1MB limit), if we write 8K for each operation, which
534 * will cost a lot space, and keep us adding more updates to one
536 lgi->lgi_off = offsetof(typeof(*llh), llh_count);
537 lgi->lgi_buf.lb_len = sizeof(llh->llh_count);
538 lgi->lgi_buf.lb_buf = &llh->llh_count;
539 rc = dt_record_write(env, o, &lgi->lgi_buf, &lgi->lgi_off, th);
543 lgi->lgi_off = offsetof(typeof(*llh),
544 llh_bitmap[index / (sizeof(*llh->llh_bitmap) * 8)]);
545 lgi->lgi_buf.lb_len = sizeof(*llh->llh_bitmap);
546 lgi->lgi_buf.lb_buf =
547 &llh->llh_bitmap[index/(sizeof(*llh->llh_bitmap)*8)];
548 rc = dt_record_write(env, o, &lgi->lgi_buf, &lgi->lgi_off, th);
552 lgi->lgi_off = offsetof(typeof(*llh), llh_tail);
553 lgi->lgi_buf.lb_len = sizeof(llh->llh_tail);
554 lgi->lgi_buf.lb_buf = &llh->llh_tail;
555 rc = dt_record_write(env, o, &lgi->lgi_buf, &lgi->lgi_off, th);
560 rc = dt_attr_get(env, o, &lgi->lgi_attr);
564 LASSERT(lgi->lgi_attr.la_valid & LA_SIZE);
565 lgi->lgi_off = lgi->lgi_attr.la_size;
566 lgi->lgi_buf.lb_len = reclen;
567 lgi->lgi_buf.lb_buf = rec;
568 rc = dt_record_write(env, o, &lgi->lgi_buf, &lgi->lgi_off, th);
572 CDEBUG(D_OTHER, "added record "DOSTID": idx: %u, %u\n",
573 POSTID(&loghandle->lgh_id.lgl_oi), index, rec->lrh_len);
574 if (reccookie != NULL) {
575 reccookie->lgc_lgl = loghandle->lgh_id;
576 reccookie->lgc_index = index;
577 if ((rec->lrh_type == MDS_UNLINK_REC) ||
578 (rec->lrh_type == MDS_SETATTR64_REC))
579 reccookie->lgc_subsys = LLOG_MDS_OST_ORIG_CTXT;
580 else if (rec->lrh_type == OST_SZ_REC)
581 reccookie->lgc_subsys = LLOG_SIZE_ORIG_CTXT;
583 reccookie->lgc_subsys = -1;
588 /* cleanup llog for error case */
589 spin_lock(&loghandle->lgh_hdr_lock);
590 ext2_clear_bit(index, llh->llh_bitmap);
592 spin_unlock(&loghandle->lgh_hdr_lock);
594 /* restore llog last_idx */
595 loghandle->lgh_last_idx--;
596 llh->llh_tail.lrt_index = loghandle->lgh_last_idx;
602 * We can skip reading at least as many log blocks as the number of
603 * minimum sized log records we are skipping. If it turns out
604 * that we are not far enough along the log (because the
605 * actual records are larger than minimum size) we just skip
608 static inline void llog_skip_over(__u64 *off, int curr, int goal)
612 *off = (*off + (goal - curr - 1) * LLOG_MIN_REC_SIZE) &
613 ~(LLOG_CHUNK_SIZE - 1);
617 * Remove optional fields that the client doesn't expect.
618 * This is typically in order to ensure compatibility with older clients.
619 * It is assumed that since we exclusively remove fields, the block will be
620 * big enough to handle the remapped records. It is also assumed that records
621 * of a block have the same format (i.e.: the same features enabled).
623 * \param[in,out] hdr Header of the block of records to remap.
624 * \param[in,out] last_hdr Last header, don't read past this point.
625 * \param[in] flags Flags describing the fields to keep.
627 static void changelog_block_trim_ext(struct llog_rec_hdr *hdr,
628 struct llog_rec_hdr *last_hdr,
629 enum changelog_rec_flags flags)
631 if (hdr->lrh_type != CHANGELOG_REC)
635 struct changelog_rec *rec = (struct changelog_rec *)(hdr + 1);
637 changelog_remap_rec(rec, rec->cr_flags & flags);
638 hdr = llog_rec_hdr_next(hdr);
639 } while ((char *)hdr <= (char *)last_hdr);
643 * Implementation of the llog_operations::lop_next_block
645 * This function finds the the next llog block to return which contains
646 * record with required index. It is main part of llog processing.
648 * \param[in] env execution environment
649 * \param[in] loghandle llog handle of the current llog
650 * \param[in,out] cur_idx index preceeding cur_offset
651 * \param[in] next_idx target index to find
652 * \param[in,out] cur_offset furtherst point read in the file
653 * \param[in] buf pointer to data buffer to fill
654 * \param[in] len required len to read, it is
655 * LLOG_CHUNK_SIZE usually.
657 * \retval 0 on successful buffer read
658 * \retval negative value on error
660 static int llog_osd_next_block(const struct lu_env *env,
661 struct llog_handle *loghandle, int *cur_idx,
662 int next_idx, __u64 *cur_offset, void *buf,
665 struct llog_thread_info *lgi = llog_info(env);
667 struct dt_device *dt;
675 if (len == 0 || len & (LLOG_CHUNK_SIZE - 1))
678 CDEBUG(D_OTHER, "looking for log index %u (cur idx %u off "LPU64")\n",
679 next_idx, *cur_idx, *cur_offset);
682 LASSERT(loghandle->lgh_ctxt);
684 o = loghandle->lgh_obj;
686 LASSERT(dt_object_exists(o));
687 dt = lu2dt_dev(o->do_lu.lo_dev);
690 rc = dt_attr_get(env, o, &lgi->lgi_attr);
694 while (*cur_offset < lgi->lgi_attr.la_size) {
695 struct llog_rec_hdr *rec, *last_rec;
696 struct llog_rec_tail *tail;
698 llog_skip_over(cur_offset, *cur_idx, next_idx);
700 /* read up to next LLOG_CHUNK_SIZE block */
701 lgi->lgi_buf.lb_len = LLOG_CHUNK_SIZE -
702 (*cur_offset & (LLOG_CHUNK_SIZE - 1));
703 lgi->lgi_buf.lb_buf = buf;
705 rc = dt_read(env, o, &lgi->lgi_buf, cur_offset);
707 CERROR("%s: can't read llog block from log "DFID
708 " offset "LPU64": rc = %d\n",
709 o->do_lu.lo_dev->ld_obd->obd_name,
710 PFID(lu_object_fid(&o->do_lu)), *cur_offset,
716 /* signal the end of the valid buffer to
718 memset(buf + rc, 0, len - rc);
721 if (rc == 0) /* end of file, nothing to do */
724 if (rc < sizeof(*tail)) {
725 CERROR("%s: invalid llog block at log id "DOSTID"/%u "
727 o->do_lu.lo_dev->ld_obd->obd_name,
728 POSTID(&loghandle->lgh_id.lgl_oi),
729 loghandle->lgh_id.lgl_ogen, *cur_offset);
730 GOTO(out, rc = -EINVAL);
734 if (LLOG_REC_HDR_NEEDS_SWABBING(rec))
735 lustre_swab_llog_rec(rec);
737 tail = (struct llog_rec_tail *)((char *)buf + rc -
738 sizeof(struct llog_rec_tail));
739 /* get the last record in block */
740 last_rec = (struct llog_rec_hdr *)((char *)buf + rc -
743 if (LLOG_REC_HDR_NEEDS_SWABBING(last_rec))
744 lustre_swab_llog_rec(last_rec);
745 LASSERT(last_rec->lrh_index == tail->lrt_index);
747 *cur_idx = tail->lrt_index;
749 /* this shouldn't happen */
750 if (tail->lrt_index == 0) {
751 CERROR("%s: invalid llog tail at log id "DOSTID"/%u "
753 o->do_lu.lo_dev->ld_obd->obd_name,
754 POSTID(&loghandle->lgh_id.lgl_oi),
755 loghandle->lgh_id.lgl_ogen, *cur_offset);
756 GOTO(out, rc = -EINVAL);
758 if (tail->lrt_index < next_idx)
761 /* sanity check that the start of the new buffer is no farther
762 * than the record that we wanted. This shouldn't happen. */
763 if (rec->lrh_index > next_idx) {
764 CERROR("%s: missed desired record? %u > %u\n",
765 o->do_lu.lo_dev->ld_obd->obd_name,
766 rec->lrh_index, next_idx);
767 GOTO(out, rc = -ENOENT);
770 /* Trim unsupported extensions for compat w/ older clients */
771 if (!(loghandle->lgh_hdr->llh_flags & LLOG_F_EXT_JOBID))
772 changelog_block_trim_ext(rec, last_rec,
773 CLF_VERSION | CLF_RENAME);
777 GOTO(out, rc = -EIO);
783 * Implementation of the llog_operations::lop_prev_block
785 * This function finds the llog block to return which contains
786 * record with required index but in reverse order - from end of llog
788 * It is main part of reverse llog processing.
790 * \param[in] env execution environment
791 * \param[in] loghandle llog handle of the current llog
792 * \param[in] prev_idx target index to find
793 * \param[in] buf pointer to data buffer to fill
794 * \param[in] len required len to read, it is LLOG_CHUNK_SIZE usually.
796 * \retval 0 on successful buffer read
797 * \retval negative value on error
799 static int llog_osd_prev_block(const struct lu_env *env,
800 struct llog_handle *loghandle,
801 int prev_idx, void *buf, int len)
803 struct llog_thread_info *lgi = llog_info(env);
805 struct dt_device *dt;
811 if (len == 0 || len & (LLOG_CHUNK_SIZE - 1))
814 CDEBUG(D_OTHER, "looking for log index %u\n", prev_idx);
817 LASSERT(loghandle->lgh_ctxt);
819 o = loghandle->lgh_obj;
821 LASSERT(dt_object_exists(o));
822 dt = lu2dt_dev(o->do_lu.lo_dev);
825 cur_offset = LLOG_CHUNK_SIZE;
826 llog_skip_over(&cur_offset, 0, prev_idx);
828 rc = dt_attr_get(env, o, &lgi->lgi_attr);
832 while (cur_offset < lgi->lgi_attr.la_size) {
833 struct llog_rec_hdr *rec, *last_rec;
834 struct llog_rec_tail *tail;
836 lgi->lgi_buf.lb_len = len;
837 lgi->lgi_buf.lb_buf = buf;
838 rc = dt_read(env, o, &lgi->lgi_buf, &cur_offset);
840 CERROR("%s: can't read llog block from log "DFID
841 " offset "LPU64": rc = %d\n",
842 o->do_lu.lo_dev->ld_obd->obd_name,
843 PFID(lu_object_fid(&o->do_lu)), cur_offset, rc);
847 if (rc == 0) /* end of file, nothing to do */
850 if (rc < sizeof(*tail)) {
851 CERROR("%s: invalid llog block at log id "DOSTID"/%u "
853 o->do_lu.lo_dev->ld_obd->obd_name,
854 POSTID(&loghandle->lgh_id.lgl_oi),
855 loghandle->lgh_id.lgl_ogen, cur_offset);
856 GOTO(out, rc = -EINVAL);
860 if (LLOG_REC_HDR_NEEDS_SWABBING(rec))
861 lustre_swab_llog_rec(rec);
863 tail = (struct llog_rec_tail *)((char *)buf + rc -
864 sizeof(struct llog_rec_tail));
865 /* get the last record in block */
866 last_rec = (struct llog_rec_hdr *)((char *)buf + rc -
867 le32_to_cpu(tail->lrt_len));
869 if (LLOG_REC_HDR_NEEDS_SWABBING(last_rec))
870 lustre_swab_llog_rec(last_rec);
871 LASSERT(last_rec->lrh_index == tail->lrt_index);
873 /* this shouldn't happen */
874 if (tail->lrt_index == 0) {
875 CERROR("%s: invalid llog tail at log id "DOSTID"/%u "
877 o->do_lu.lo_dev->ld_obd->obd_name,
878 POSTID(&loghandle->lgh_id.lgl_oi),
879 loghandle->lgh_id.lgl_ogen, cur_offset);
880 GOTO(out, rc = -EINVAL);
882 if (tail->lrt_index < prev_idx)
885 /* sanity check that the start of the new buffer is no farther
886 * than the record that we wanted. This shouldn't happen. */
887 if (rec->lrh_index > prev_idx) {
888 CERROR("%s: missed desired record? %u > %u\n",
889 o->do_lu.lo_dev->ld_obd->obd_name,
890 rec->lrh_index, prev_idx);
891 GOTO(out, rc = -ENOENT);
894 /* Trim unsupported extensions for compat w/ older clients */
895 if (!(loghandle->lgh_hdr->llh_flags & LLOG_F_EXT_JOBID))
896 changelog_block_trim_ext(rec, last_rec,
897 CLF_VERSION | CLF_RENAME);
901 GOTO(out, rc = -EIO);
907 * This is helper function to get llog directory object. It is used by named
908 * llog operations to find/insert/delete llog entry from llog directory.
910 * \param[in] env execution environment
911 * \param[in] ctxt llog context
913 * \retval dt_object of llog directory
914 * \retval ERR_PTR of negative value on error
916 static struct dt_object *llog_osd_dir_get(const struct lu_env *env,
917 struct llog_ctxt *ctxt)
919 struct dt_device *dt;
920 struct dt_thread_info *dti = dt_info(env);
921 struct dt_object *dir;
924 dt = ctxt->loc_exp->exp_obd->obd_lvfs_ctxt.dt;
925 if (ctxt->loc_dir == NULL) {
926 rc = dt_root_get(env, dt, &dti->dti_fid);
929 dir = dt_locate(env, dt, &dti->dti_fid);
931 if (!IS_ERR(dir) && !dt_try_as_dir(env, dir)) {
932 lu_object_put(env, &dir->do_lu);
933 return ERR_PTR(-ENOTDIR);
936 lu_object_get(&ctxt->loc_dir->do_lu);
944 * Implementation of the llog_operations::lop_open
946 * This function opens the llog by its logid or by name, it may open also
947 * non existent llog and assing then new id to it.
948 * The llog_open/llog_close pair works similar to lu_object_find/put,
949 * the object may not exist prior open. The result of open is just dt_object
950 * in the llog header.
952 * \param[in] env execution environment
953 * \param[in] handle llog handle of the current llog
954 * \param[in] logid logid of llog to open (nameless llog)
955 * \param[in] name name of llog to open (named llog)
956 * \param[in] open_param
957 * LLOG_OPEN_NEW - new llog, may not exist
958 * LLOG_OPEN_EXIST - old llog, must exist
960 * \retval 0 on successful open, llog_handle::lgh_obj
961 * contains the dt_object of the llog.
962 * \retval negative value on error
964 static int llog_osd_open(const struct lu_env *env, struct llog_handle *handle,
965 struct llog_logid *logid, char *name,
966 enum llog_open_param open_param)
968 struct llog_thread_info *lgi = llog_info(env);
969 struct llog_ctxt *ctxt = handle->lgh_ctxt;
971 struct dt_device *dt;
972 struct ls_device *ls;
973 struct local_oid_storage *los;
980 LASSERT(ctxt->loc_exp);
981 LASSERT(ctxt->loc_exp->exp_obd);
982 dt = ctxt->loc_exp->exp_obd->obd_lvfs_ctxt.dt;
985 ls = ls_device_get(dt);
989 mutex_lock(&ls->ls_los_mutex);
990 los = dt_los_find(ls, name != NULL ? FID_SEQ_LLOG_NAME : FID_SEQ_LLOG);
991 mutex_unlock(&ls->ls_los_mutex);
993 ls_device_put(env, ls);
998 logid_to_fid(logid, &lgi->lgi_fid);
1000 struct dt_object *llog_dir;
1002 llog_dir = llog_osd_dir_get(env, ctxt);
1003 if (IS_ERR(llog_dir))
1004 GOTO(out, rc = PTR_ERR(llog_dir));
1005 dt_read_lock(env, llog_dir, 0);
1006 rc = dt_lookup_dir(env, llog_dir, name, &lgi->lgi_fid);
1007 dt_read_unlock(env, llog_dir);
1008 lu_object_put(env, &llog_dir->do_lu);
1009 if (rc == -ENOENT && open_param == LLOG_OPEN_NEW) {
1010 /* generate fid for new llog */
1011 rc = local_object_fid_generate(env, los,
1016 OBD_ALLOC(handle->lgh_name, strlen(name) + 1);
1017 if (handle->lgh_name)
1018 strcpy(handle->lgh_name, name);
1020 GOTO(out, rc = -ENOMEM);
1022 LASSERTF(open_param & LLOG_OPEN_NEW, "%#x\n", open_param);
1023 /* generate fid for new llog */
1024 rc = local_object_fid_generate(env, los, &lgi->lgi_fid);
1029 o = ls_locate(env, ls, &lgi->lgi_fid, NULL);
1031 GOTO(out_name, rc = PTR_ERR(o));
1033 /* No new llog is expected but doesn't exist */
1034 if (open_param != LLOG_OPEN_NEW && !dt_object_exists(o))
1035 GOTO(out_put, rc = -ENOENT);
1037 fid_to_logid(&lgi->lgi_fid, &handle->lgh_id);
1038 handle->lgh_obj = o;
1039 handle->private_data = los;
1040 LASSERT(handle->lgh_ctxt);
1045 lu_object_put(env, &o->do_lu);
1047 if (handle->lgh_name != NULL)
1048 OBD_FREE(handle->lgh_name, strlen(name) + 1);
1055 * Implementation of the llog_operations::lop_exist
1057 * This function checks that llog exists on storage.
1059 * \param[in] handle llog handle of the current llog
1061 * \retval true if llog object exists and is not just destroyed
1062 * \retval false if llog doesn't exist or just destroyed
1064 static int llog_osd_exist(struct llog_handle *handle)
1066 LASSERT(handle->lgh_obj);
1067 return (dt_object_exists(handle->lgh_obj) &&
1068 !lu_object_is_dying(handle->lgh_obj->do_lu.lo_header));
1072 * Implementation of the llog_operations::lop_declare_create
1074 * This function declares the llog create. It declares also name insert
1075 * into llog directory in case of named llog.
1077 * \param[in] env execution environment
1078 * \param[in] res llog handle of the current llog
1079 * \param[in] th current transaction handle
1081 * \retval 0 on successful create declaration
1082 * \retval negative value on error
1084 static int llog_osd_declare_create(const struct lu_env *env,
1085 struct llog_handle *res, struct thandle *th)
1087 struct llog_thread_info *lgi = llog_info(env);
1088 struct dt_insert_rec *rec = &lgi->lgi_dt_rec;
1089 struct local_oid_storage *los;
1090 struct dt_object *o;
1095 LASSERT(res->lgh_obj);
1098 /* object can be created by another thread */
1100 if (dt_object_exists(o))
1103 los = res->private_data;
1106 rc = llog_osd_declare_new_object(env, los, o, th);
1110 /* do not declare header initialization here as it's declared
1111 * in llog_osd_declare_write_rec() which is always called */
1113 if (res->lgh_name) {
1114 struct dt_object *llog_dir;
1116 llog_dir = llog_osd_dir_get(env, res->lgh_ctxt);
1117 if (IS_ERR(llog_dir))
1118 RETURN(PTR_ERR(llog_dir));
1119 logid_to_fid(&res->lgh_id, &lgi->lgi_fid);
1120 rec->rec_fid = &lgi->lgi_fid;
1121 rec->rec_type = S_IFREG;
1122 rc = dt_declare_insert(env, llog_dir,
1123 (struct dt_rec *)rec,
1124 (struct dt_key *)res->lgh_name, th);
1125 lu_object_put(env, &llog_dir->do_lu);
1127 CERROR("%s: can't declare named llog %s: rc = %d\n",
1128 o->do_lu.lo_dev->ld_obd->obd_name,
1135 * Implementation of the llog_operations::lop_create
1137 * This function creates the llog according with llog_handle::lgh_obj
1138 * and llog_handle::lgh_name.
1140 * \param[in] env execution environment
1141 * \param[in] res llog handle of the current llog
1142 * \param[in] th current transaction handle
1144 * \retval 0 on successful create
1145 * \retval negative value on error
1147 static int llog_osd_create(const struct lu_env *env, struct llog_handle *res,
1150 struct llog_thread_info *lgi = llog_info(env);
1151 struct dt_insert_rec *rec = &lgi->lgi_dt_rec;
1152 struct local_oid_storage *los;
1153 struct dt_object *o;
1162 /* llog can be already created */
1163 if (dt_object_exists(o))
1166 los = res->private_data;
1169 dt_write_lock(env, o, 0);
1170 if (!dt_object_exists(o))
1171 rc = llog_osd_create_new_object(env, los, o, th);
1175 dt_write_unlock(env, o);
1179 if (res->lgh_name) {
1180 struct dt_object *llog_dir;
1182 llog_dir = llog_osd_dir_get(env, res->lgh_ctxt);
1183 if (IS_ERR(llog_dir))
1184 RETURN(PTR_ERR(llog_dir));
1186 logid_to_fid(&res->lgh_id, &lgi->lgi_fid);
1187 rec->rec_fid = &lgi->lgi_fid;
1188 rec->rec_type = S_IFREG;
1189 dt_read_lock(env, llog_dir, 0);
1190 rc = dt_insert(env, llog_dir, (struct dt_rec *)rec,
1191 (struct dt_key *)res->lgh_name,
1193 dt_read_unlock(env, llog_dir);
1194 lu_object_put(env, &llog_dir->do_lu);
1196 CERROR("%s: can't create named llog %s: rc = %d\n",
1197 o->do_lu.lo_dev->ld_obd->obd_name,
1204 * Implementation of the llog_operations::lop_close
1206 * This function closes the llog. It just put llog object and referenced
1209 * \param[in] env execution environment
1210 * \param[in] handle llog handle of the current llog
1212 * \retval 0 on successful llog close
1213 * \retval negative value on error
1215 static int llog_osd_close(const struct lu_env *env, struct llog_handle *handle)
1217 struct local_oid_storage *los;
1222 LASSERT(handle->lgh_obj);
1224 lu_object_put(env, &handle->lgh_obj->do_lu);
1226 los = handle->private_data;
1230 if (handle->lgh_name)
1231 OBD_FREE(handle->lgh_name, strlen(handle->lgh_name) + 1);
1237 * Implementation of the llog_operations::lop_destroy
1239 * This function destroys the llog and deletes also entry in the
1240 * llog directory in case of named llog. Llog should be opened prior that.
1241 * Destroy method is not part of external transaction and does everything
1244 * \param[in] env execution environment
1245 * \param[in] loghandle llog handle of the current llog
1247 * \retval 0 on successful destroy
1248 * \retval negative value on error
1250 static int llog_osd_destroy(const struct lu_env *env,
1251 struct llog_handle *loghandle)
1253 struct llog_ctxt *ctxt;
1254 struct dt_object *o, *llog_dir = NULL;
1255 struct dt_device *d;
1262 ctxt = loghandle->lgh_ctxt;
1265 o = loghandle->lgh_obj;
1268 d = lu2dt_dev(o->do_lu.lo_dev);
1270 LASSERT(d == ctxt->loc_exp->exp_obd->obd_lvfs_ctxt.dt);
1272 th = dt_trans_create(env, d);
1274 RETURN(PTR_ERR(th));
1276 if (loghandle->lgh_name) {
1277 llog_dir = llog_osd_dir_get(env, ctxt);
1278 if (IS_ERR(llog_dir))
1279 GOTO(out_trans, rc = PTR_ERR(llog_dir));
1281 name = loghandle->lgh_name;
1282 rc = dt_declare_delete(env, llog_dir,
1283 (struct dt_key *)name, th);
1285 GOTO(out_trans, rc);
1288 rc = dt_declare_ref_del(env, o, th);
1290 GOTO(out_trans, rc);
1292 rc = dt_declare_destroy(env, o, th);
1294 GOTO(out_trans, rc);
1296 rc = dt_trans_start_local(env, d, th);
1298 GOTO(out_trans, rc);
1300 dt_write_lock(env, o, 0);
1301 if (dt_object_exists(o)) {
1303 dt_read_lock(env, llog_dir, 0);
1304 rc = dt_delete(env, llog_dir,
1305 (struct dt_key *) name,
1307 dt_read_unlock(env, llog_dir);
1309 CERROR("%s: can't remove llog %s: rc = %d\n",
1310 o->do_lu.lo_dev->ld_obd->obd_name,
1312 GOTO(out_unlock, rc);
1315 dt_ref_del(env, o, th);
1316 rc = dt_destroy(env, o, th);
1318 GOTO(out_unlock, rc);
1321 dt_write_unlock(env, o);
1323 dt_trans_stop(env, d, th);
1324 if (llog_dir != NULL)
1325 lu_object_put(env, &llog_dir->do_lu);
1330 * Implementation of the llog_operations::lop_setup
1332 * This function setup the llog on local storage.
1334 * \param[in] env execution environment
1335 * \param[in] obd obd device the llog belongs to
1336 * \param[in] olg the llog group, it is always zero group now.
1337 * \param[in] ctxt_idx the llog index, it defines the purpose of this llog.
1338 * Every new llog type have to use own index.
1339 * \param[in] disk_obd the storage obd, where llog is stored.
1341 * \retval 0 on successful llog setup
1342 * \retval negative value on error
1344 static int llog_osd_setup(const struct lu_env *env, struct obd_device *obd,
1345 struct obd_llog_group *olg, int ctxt_idx,
1346 struct obd_device *disk_obd)
1348 struct llog_thread_info *lgi = llog_info(env);
1349 struct llog_ctxt *ctxt;
1354 LASSERT(olg->olg_ctxts[ctxt_idx]);
1356 ctxt = llog_ctxt_get(olg->olg_ctxts[ctxt_idx]);
1359 /* initialize data allowing to generate new fids,
1360 * literally we need a sequece */
1361 lgi->lgi_fid.f_seq = FID_SEQ_LLOG;
1362 lgi->lgi_fid.f_oid = 1;
1363 lgi->lgi_fid.f_ver = 0;
1364 rc = local_oid_storage_init(env, disk_obd->obd_lvfs_ctxt.dt,
1366 &ctxt->loc_los_nameless);
1370 lgi->lgi_fid.f_seq = FID_SEQ_LLOG_NAME;
1371 lgi->lgi_fid.f_oid = 1;
1372 lgi->lgi_fid.f_ver = 0;
1373 rc = local_oid_storage_init(env, disk_obd->obd_lvfs_ctxt.dt,
1375 &ctxt->loc_los_named);
1377 local_oid_storage_fini(env, ctxt->loc_los_nameless);
1378 ctxt->loc_los_nameless = NULL;
1384 llog_ctxt_put(ctxt);
1389 * Implementation of the llog_operations::lop_cleanup
1391 * This function cleanups the llog on local storage.
1393 * \param[in] env execution environment
1394 * \param[in] ctxt the llog context
1398 static int llog_osd_cleanup(const struct lu_env *env, struct llog_ctxt *ctxt)
1400 if (ctxt->loc_los_nameless != NULL) {
1401 local_oid_storage_fini(env, ctxt->loc_los_nameless);
1402 ctxt->loc_los_nameless = NULL;
1405 if (ctxt->loc_los_named != NULL) {
1406 local_oid_storage_fini(env, ctxt->loc_los_named);
1407 ctxt->loc_los_named = NULL;
1413 struct llog_operations llog_osd_ops = {
1414 .lop_next_block = llog_osd_next_block,
1415 .lop_prev_block = llog_osd_prev_block,
1416 .lop_read_header = llog_osd_read_header,
1417 .lop_destroy = llog_osd_destroy,
1418 .lop_setup = llog_osd_setup,
1419 .lop_cleanup = llog_osd_cleanup,
1420 .lop_open = llog_osd_open,
1421 .lop_exist = llog_osd_exist,
1422 .lop_declare_create = llog_osd_declare_create,
1423 .lop_create = llog_osd_create,
1424 .lop_declare_write_rec = llog_osd_declare_write_rec,
1425 .lop_write_rec = llog_osd_write_rec,
1426 .lop_close = llog_osd_close,
1428 EXPORT_SYMBOL(llog_osd_ops);
1431 * Read the special file which contains the list of llog catalogs IDs
1433 * This function reads the CATALOGS file which contains the array of llog
1434 * catalogs IDs. The main purpose of this file is to store OSP llogs indexed
1435 * by OST/MDT number.
1437 * \param[in] env execution environment
1438 * \param[in] d corresponding storage device
1439 * \param[in] idx position to start from, usually OST/MDT index
1440 * \param[in] count how many catalog IDs to read
1441 * \param[out] idarray the buffer for the data. If it is NULL then
1442 * function returns just number of catalog IDs
1444 * \param[in] fid LLOG_CATALOGS_OID for CATALOG object
1446 * \retval 0 on successful read of catalog IDs
1447 * \retval negative value on error
1448 * \retval positive value which is number of records in
1449 * the file if \a idarray is NULL
1451 int llog_osd_get_cat_list(const struct lu_env *env, struct dt_device *d,
1452 int idx, int count, struct llog_catid *idarray,
1453 const struct lu_fid *fid)
1455 struct llog_thread_info *lgi = llog_info(env);
1456 struct dt_object *o = NULL;
1464 size = sizeof(*idarray) * count;
1465 lgi->lgi_off = idx * sizeof(*idarray);
1467 lgi->lgi_fid = *fid;
1468 o = dt_locate(env, d, &lgi->lgi_fid);
1472 if (!dt_object_exists(o)) {
1473 th = dt_trans_create(env, d);
1475 GOTO(out, rc = PTR_ERR(th));
1477 lgi->lgi_attr.la_valid = LA_MODE;
1478 lgi->lgi_attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
1479 lgi->lgi_dof.dof_type = dt_mode_to_dft(S_IFREG);
1481 rc = dt_declare_create(env, o, &lgi->lgi_attr, NULL,
1484 GOTO(out_trans, rc);
1486 rc = dt_trans_start_local(env, d, th);
1488 GOTO(out_trans, rc);
1490 dt_write_lock(env, o, 0);
1491 if (!dt_object_exists(o))
1492 rc = dt_create(env, o, &lgi->lgi_attr, NULL,
1494 dt_write_unlock(env, o);
1496 dt_trans_stop(env, d, th);
1501 rc = dt_attr_get(env, o, &lgi->lgi_attr);
1505 if (!S_ISREG(lgi->lgi_attr.la_mode)) {
1506 CERROR("%s: CATALOGS is not a regular file!: mode = %o\n",
1507 o->do_lu.lo_dev->ld_obd->obd_name,
1508 lgi->lgi_attr.la_mode);
1509 GOTO(out, rc = -ENOENT);
1512 CDEBUG(D_CONFIG, "cat list: disk size=%d, read=%d\n",
1513 (int)lgi->lgi_attr.la_size, size);
1515 /* return just number of llogs */
1516 if (idarray == NULL) {
1517 rc = lgi->lgi_attr.la_size / sizeof(*idarray);
1521 /* read for new ost index or for empty file */
1522 memset(idarray, 0, size);
1523 if (lgi->lgi_attr.la_size <= lgi->lgi_off)
1525 if (lgi->lgi_attr.la_size < lgi->lgi_off + size)
1526 size = lgi->lgi_attr.la_size - lgi->lgi_off;
1528 lgi->lgi_buf.lb_buf = idarray;
1529 lgi->lgi_buf.lb_len = size;
1530 rc = dt_record_read(env, o, &lgi->lgi_buf, &lgi->lgi_off);
1531 /* -EFAULT means the llog is a sparse file. This is not an error
1532 * after arbitrary OST index is supported. */
1533 if (rc < 0 && rc != -EFAULT) {
1534 CERROR("%s: error reading CATALOGS: rc = %d\n",
1535 o->do_lu.lo_dev->ld_obd->obd_name, rc);
1541 lu_object_put(env, &o->do_lu);
1544 EXPORT_SYMBOL(llog_osd_get_cat_list);
1547 * Write the special file which contains the list of llog catalogs IDs
1549 * This function writes the CATALOG file which contains the array of llog
1550 * catalogs IDs. It is used mostly to store OSP llogs indexed by OST/MDT
1553 * \param[in] env execution environment
1554 * \param[in] d corresponding storage device
1555 * \param[in] idx position to start from, usually OST/MDT index
1556 * \param[in] count how many catalog IDs to write
1557 * \param[out] idarray the buffer with the data to write.
1558 * \param[in] fid LLOG_CATALOGS_OID for CATALOG object
1560 * \retval 0 on successful write of catalog IDs
1561 * \retval negative value on error
1563 int llog_osd_put_cat_list(const struct lu_env *env, struct dt_device *d,
1564 int idx, int count, struct llog_catid *idarray,
1565 const struct lu_fid *fid)
1567 struct llog_thread_info *lgi = llog_info(env);
1568 struct dt_object *o = NULL;
1577 size = sizeof(*idarray) * count;
1578 lgi->lgi_off = idx * sizeof(*idarray);
1579 lgi->lgi_fid = *fid;
1581 o = dt_locate(env, d, &lgi->lgi_fid);
1585 if (!dt_object_exists(o))
1586 GOTO(out, rc = -ENOENT);
1588 rc = dt_attr_get(env, o, &lgi->lgi_attr);
1592 if (!S_ISREG(lgi->lgi_attr.la_mode)) {
1593 CERROR("%s: CATALOGS is not a regular file!: mode = %o\n",
1594 o->do_lu.lo_dev->ld_obd->obd_name,
1595 lgi->lgi_attr.la_mode);
1596 GOTO(out, rc = -ENOENT);
1599 th = dt_trans_create(env, d);
1601 GOTO(out, rc = PTR_ERR(th));
1603 lgi->lgi_buf.lb_len = size;
1604 lgi->lgi_buf.lb_buf = idarray;
1605 rc = dt_declare_record_write(env, o, &lgi->lgi_buf, lgi->lgi_off, th);
1609 rc = dt_trans_start_local(env, d, th);
1611 GOTO(out_trans, rc);
1613 rc = dt_record_write(env, o, &lgi->lgi_buf, &lgi->lgi_off, th);
1615 CDEBUG(D_INODE, "can't write CATALOGS at index %d: rc = %d\n",
1618 dt_trans_stop(env, d, th);
1620 lu_object_put(env, &o->do_lu);
1623 EXPORT_SYMBOL(llog_osd_put_cat_list);