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;
198 lgi = llog_info(env);
200 rc = dt_attr_get(env, o, &lgi->lgi_attr);
204 LASSERT(lgi->lgi_attr.la_valid & LA_SIZE);
206 if (lgi->lgi_attr.la_size == 0) {
207 CDEBUG(D_HA, "not reading header from 0-byte log\n");
211 flags = handle->lgh_hdr->llh_flags;
214 lgi->lgi_buf.lb_buf = handle->lgh_hdr;
215 lgi->lgi_buf.lb_len = handle->lgh_hdr_size;
216 rc = dt_read(env, o, &lgi->lgi_buf, &lgi->lgi_off);
217 llh_hdr = &handle->lgh_hdr->llh_hdr;
218 if (rc < sizeof(*llh_hdr) || rc < llh_hdr->lrh_len) {
219 CERROR("%s: error reading "DFID" log header size %d: rc = %d\n",
220 o->do_lu.lo_dev->ld_obd->obd_name,
221 PFID(lu_object_fid(&o->do_lu)), rc < 0 ? 0 : rc,
230 if (LLOG_REC_HDR_NEEDS_SWABBING(llh_hdr))
231 lustre_swab_llog_hdr(handle->lgh_hdr);
233 if (llh_hdr->lrh_type != LLOG_HDR_MAGIC) {
234 CERROR("%s: bad log %s "DFID" header magic: %#x "
235 "(expected %#x)\n", o->do_lu.lo_dev->ld_obd->obd_name,
236 handle->lgh_name ? handle->lgh_name : "",
237 PFID(lu_object_fid(&o->do_lu)),
238 llh_hdr->lrh_type, LLOG_HDR_MAGIC);
240 } else if (llh_hdr->lrh_len < LLOG_MIN_CHUNK_SIZE ||
241 llh_hdr->lrh_len > handle->lgh_hdr_size) {
242 CERROR("%s: incorrectly sized log %s "DFID" header: "
243 "%#x (expected at least %#x)\n"
244 "you may need to re-run lconf --write_conf.\n",
245 o->do_lu.lo_dev->ld_obd->obd_name,
246 handle->lgh_name ? handle->lgh_name : "",
247 PFID(lu_object_fid(&o->do_lu)),
248 llh_hdr->lrh_len, LLOG_MIN_CHUNK_SIZE);
250 } else if (LLOG_HDR_TAIL(handle->lgh_hdr)->lrt_index >
251 LLOG_HDR_BITMAP_SIZE(handle->lgh_hdr) ||
252 LLOG_HDR_TAIL(handle->lgh_hdr)->lrt_len !=
254 CERROR("%s: incorrectly sized log %s "DFID" tailer: "
256 o->do_lu.lo_dev->ld_obd->obd_name,
257 handle->lgh_name ? handle->lgh_name : "",
258 PFID(lu_object_fid(&o->do_lu)),
259 LLOG_HDR_TAIL(handle->lgh_hdr)->lrt_len, -EIO);
263 handle->lgh_hdr->llh_flags |= (flags & LLOG_F_EXT_MASK);
264 handle->lgh_last_idx = LLOG_HDR_TAIL(handle->lgh_hdr)->lrt_index;
270 * Implementation of the llog_operations::lop_declare_write
272 * This function declares the new record write.
274 * \param[in] env execution environment
275 * \param[in] loghandle llog handle of the current llog
276 * \param[in] rec llog record header. This is a real header of the full
277 * llog record to write. This is the beginning of buffer
278 * to write, the length of buffer is stored in
280 * \param[in] idx index of the llog record. If \a idx == -1 then this is
281 * append case, otherwise \a idx is the index of record
283 * \param[in] th current transaction handle
285 * \retval 0 on successful declaration
286 * \retval negative error if declaration failed
288 static int llog_osd_declare_write_rec(const struct lu_env *env,
289 struct llog_handle *loghandle,
290 struct llog_rec_hdr *rec,
291 int idx, struct thandle *th)
293 struct llog_thread_info *lgi = llog_info(env);
304 LASSERT(rec->lrh_len <= loghandle->lgh_ctxt->loc_chunk_size);
306 o = loghandle->lgh_obj;
309 chunk_size = loghandle->lgh_ctxt->loc_chunk_size;
310 lgi->lgi_buf.lb_len = chunk_size;
311 lgi->lgi_buf.lb_buf = NULL;
312 /* each time we update header */
313 rc = dt_declare_record_write(env, o, &lgi->lgi_buf, 0,
315 if (rc || idx == 0) /* if error or just header */
319 * the pad record can be inserted so take into account double
322 lgi->lgi_buf.lb_len = chunk_size * 2;
323 lgi->lgi_buf.lb_buf = NULL;
324 /* XXX: implement declared window or multi-chunks approach */
325 rc = dt_declare_record_write(env, o, &lgi->lgi_buf, -1, th);
331 * Implementation of the llog_operations::lop_write
333 * This function writes the new record in the llog or modify the existed one.
335 * \param[in] env execution environment
336 * \param[in] loghandle llog handle of the current llog
337 * \param[in] rec llog record header. This is a real header of
338 * the full llog record to write. This is
339 * the beginning of buffer to write, the length
340 * of buffer is stored in \a rec::lrh_len
341 * \param[out] reccookie pointer to the cookie to return back if needed.
342 * It is used for further cancel of this llog
344 * \param[in] idx index of the llog record. If \a idx == -1 then
345 * this is append case, otherwise \a idx is
346 * the index of record to modify
347 * \param[in] th current transaction handle
349 * \retval 0 on successful write && \a reccookie == NULL
350 * 1 on successful write && \a reccookie != NULL
351 * \retval negative error if write failed
353 static int llog_osd_write_rec(const struct lu_env *env,
354 struct llog_handle *loghandle,
355 struct llog_rec_hdr *rec,
356 struct llog_cookie *reccookie,
357 int idx, struct thandle *th)
359 struct llog_thread_info *lgi = llog_info(env);
360 struct llog_log_hdr *llh;
361 int reclen = rec->lrh_len;
363 struct llog_rec_tail *lrt;
371 llh = loghandle->lgh_hdr;
373 o = loghandle->lgh_obj;
377 chunk_size = llh->llh_hdr.lrh_len;
378 CDEBUG(D_OTHER, "new record %x to "DFID"\n",
379 rec->lrh_type, PFID(lu_object_fid(&o->do_lu)));
381 /* record length should not bigger than */
382 if (reclen > loghandle->lgh_hdr->llh_hdr.lrh_len)
385 rc = dt_attr_get(env, o, &lgi->lgi_attr);
390 * The modification case.
391 * If idx set then the record with that index must be modified.
392 * There are three cases possible:
393 * 1) the common case is the llog header update (idx == 0)
394 * 2) the llog record modification during llog process.
395 * This is indicated by the \a loghandle::lgh_cur_idx > 0.
396 * In that case the \a loghandle::lgh_cur_offset
397 * 3) otherwise this is assumed that llog consist of records of
398 * fixed size, i.e. catalog. The llog header must has llh_size
399 * field equal to record size. The record offset is calculated
400 * just by /a idx value
402 * During modification we don't need extra header update because
403 * the bitmap and record count are not changed. The record header
404 * and tail remains the same too.
406 if (idx != LLOG_NEXT_IDX) {
407 /* llog can be empty only when first record is being written */
408 LASSERT(ergo(idx > 0, lgi->lgi_attr.la_size > 0));
410 if (!ext2_test_bit(idx, LLOG_HDR_BITMAP(llh))) {
411 CERROR("%s: modify unset record %u\n",
412 o->do_lu.lo_dev->ld_obd->obd_name, idx);
416 if (idx != rec->lrh_index) {
417 CERROR("%s: modify index mismatch %d %u\n",
418 o->do_lu.lo_dev->ld_obd->obd_name, idx,
423 if (idx == LLOG_HEADER_IDX) {
424 /* llog header update */
425 LASSERT(reclen >= sizeof(struct llog_log_hdr));
426 LASSERT(rec == &llh->llh_hdr);
429 lgi->lgi_buf.lb_len = reclen;
430 lgi->lgi_buf.lb_buf = rec;
431 rc = dt_record_write(env, o, &lgi->lgi_buf,
434 } else if (loghandle->lgh_cur_idx > 0) {
436 * The lgh_cur_offset can be used only if index is
439 if (idx != loghandle->lgh_cur_idx) {
440 CERROR("%s: modify index mismatch %d %d\n",
441 o->do_lu.lo_dev->ld_obd->obd_name, idx,
442 loghandle->lgh_cur_idx);
446 lgi->lgi_off = loghandle->lgh_cur_offset;
447 CDEBUG(D_OTHER, "modify record "DOSTID": idx:%d, "
448 "len:%u offset %llu\n",
449 POSTID(&loghandle->lgh_id.lgl_oi), idx,
450 rec->lrh_len, (long long)lgi->lgi_off);
451 } else if (llh->llh_size > 0) {
452 if (llh->llh_size != rec->lrh_len) {
453 CERROR("%s: wrong record size, llh_size is %u"
454 " but record size is %u\n",
455 o->do_lu.lo_dev->ld_obd->obd_name,
456 llh->llh_size, rec->lrh_len);
459 lgi->lgi_off = sizeof(*llh) + (idx - 1) * reclen;
461 /* This can be result of lgh_cur_idx is not set during
462 * llog processing or llh_size is not set to proper
463 * record size for fixed records llog. Therefore it is
464 * impossible to get record offset. */
465 CERROR("%s: can't get record offset, idx:%d, "
466 "len:%u.\n", o->do_lu.lo_dev->ld_obd->obd_name,
471 /* update only data, header and tail remain the same */
472 lgi->lgi_off += sizeof(struct llog_rec_hdr);
473 lgi->lgi_buf.lb_len = REC_DATA_LEN(rec);
474 lgi->lgi_buf.lb_buf = REC_DATA(rec);
475 rc = dt_record_write(env, o, &lgi->lgi_buf, &lgi->lgi_off, th);
476 if (rc == 0 && reccookie) {
477 reccookie->lgc_lgl = loghandle->lgh_id;
478 reccookie->lgc_index = idx;
486 * The most common case of using llog. The new index is assigned to
487 * the new record, new bit is set in llog bitmap and llog count is
490 * Make sure that records don't cross a chunk boundary, so we can
491 * process them page-at-a-time if needed. If it will cross a chunk
492 * boundary, write in a fake (but referenced) entry to pad the chunk.
494 LASSERT(lgi->lgi_attr.la_valid & LA_SIZE);
495 lgi->lgi_off = lgi->lgi_attr.la_size;
496 left = chunk_size - (lgi->lgi_off & (chunk_size - 1));
497 /* NOTE: padding is a record, but no bit is set */
498 if (left != 0 && left != reclen &&
499 left < (reclen + LLOG_MIN_REC_SIZE)) {
500 index = loghandle->lgh_last_idx + 1;
501 rc = llog_osd_pad(env, o, &lgi->lgi_off, left, index, th);
504 loghandle->lgh_last_idx++; /* for pad rec */
506 /* if it's the last idx in log file, then return -ENOSPC */
507 if (loghandle->lgh_last_idx >= LLOG_HDR_BITMAP_SIZE(llh) - 1)
510 /* increment the last_idx along with llh_tail index, they should
511 * be equal for a llog lifetime */
512 loghandle->lgh_last_idx++;
513 index = loghandle->lgh_last_idx;
514 LLOG_HDR_TAIL(llh)->lrt_index = index;
516 * NB: the caller should make sure only 1 process access
517 * the lgh_last_idx, e.g. append should be exclusive.
518 * Otherwise it might hit the assert.
520 LASSERT(index < LLOG_HDR_BITMAP_SIZE(llh));
521 rec->lrh_index = index;
523 lrt->lrt_len = rec->lrh_len;
524 lrt->lrt_index = rec->lrh_index;
526 /* the lgh_hdr_lock protects llog header data from concurrent
527 * update/cancel, the llh_count and llh_bitmap are protected */
528 down_write(&loghandle->lgh_hdr_lock);
529 if (ext2_set_bit(index, LLOG_HDR_BITMAP(llh))) {
530 CERROR("%s: index %u already set in log bitmap\n",
531 o->do_lu.lo_dev->ld_obd->obd_name, index);
532 up_write(&loghandle->lgh_hdr_lock);
533 LBUG(); /* should never happen */
537 /* XXX It is a bit tricky here, if the log object is local,
538 * we do not need lock during write here, because if there is
539 * race, the transaction(jbd2, what about ZFS?) will make sure the
540 * conflicts will all committed in the same transaction group.
541 * But for remote object, we need lock the whole process, so to
542 * set the version of the remote transaction to make sure they
543 * are being sent in order. (see osp_md_write()) */
544 if (!dt_object_remote(o))
545 up_write(&loghandle->lgh_hdr_lock);
547 if (lgi->lgi_attr.la_size == 0) {
549 lgi->lgi_buf.lb_len = llh->llh_hdr.lrh_len;
550 lgi->lgi_buf.lb_buf = &llh->llh_hdr;
551 rc = dt_record_write(env, o, &lgi->lgi_buf, &lgi->lgi_off, th);
553 GOTO(out_remote_unlock, rc);
555 /* Note: If this is not initialization (size == 0), then do not
556 * write the whole header (8k bytes), only update header/tail
557 * and bits needs to be updated. Because this update might be
558 * part of cross-MDT operation, which needs to write these
559 * updates into the update log(32KB limit) and also pack inside
560 * the RPC (1MB limit), if we write 8K for each operation, which
561 * will cost a lot space, and keep us adding more updates to one
563 lgi->lgi_off = offsetof(typeof(*llh), llh_count);
564 lgi->lgi_buf.lb_len = sizeof(llh->llh_count);
565 lgi->lgi_buf.lb_buf = &llh->llh_count;
566 rc = dt_record_write(env, o, &lgi->lgi_buf, &lgi->lgi_off, th);
568 GOTO(out_remote_unlock, rc);
570 lgi->lgi_off = offsetof(typeof(*llh),
571 llh_bitmap[index / (sizeof(*llh->llh_bitmap) * 8)]);
572 lgi->lgi_buf.lb_len = sizeof(*llh->llh_bitmap);
573 lgi->lgi_buf.lb_buf =
574 &llh->llh_bitmap[index/(sizeof(*llh->llh_bitmap)*8)];
575 rc = dt_record_write(env, o, &lgi->lgi_buf, &lgi->lgi_off, th);
577 GOTO(out_remote_unlock, rc);
579 lgi->lgi_off = (unsigned long)LLOG_HDR_TAIL(llh) -
581 lgi->lgi_buf.lb_len = sizeof(llh->llh_tail);
582 lgi->lgi_buf.lb_buf = LLOG_HDR_TAIL(llh);
583 rc = dt_record_write(env, o, &lgi->lgi_buf, &lgi->lgi_off, th);
585 GOTO(out_remote_unlock, rc);
589 /* unlock here for remote object */
590 if (dt_object_remote(o))
591 up_write(&loghandle->lgh_hdr_lock);
595 rc = dt_attr_get(env, o, &lgi->lgi_attr);
599 LASSERT(lgi->lgi_attr.la_valid & LA_SIZE);
600 lgi->lgi_off = max_t(__u64, lgi->lgi_attr.la_size, lgi->lgi_off);
601 lgi->lgi_buf.lb_len = reclen;
602 lgi->lgi_buf.lb_buf = rec;
603 rc = dt_record_write(env, o, &lgi->lgi_buf, &lgi->lgi_off, th);
607 CDEBUG(D_OTHER, "added record "DOSTID": idx: %u, %u off"LPU64"\n",
608 POSTID(&loghandle->lgh_id.lgl_oi), index, rec->lrh_len,
610 if (reccookie != NULL) {
611 reccookie->lgc_lgl = loghandle->lgh_id;
612 reccookie->lgc_index = index;
613 if ((rec->lrh_type == MDS_UNLINK_REC) ||
614 (rec->lrh_type == MDS_SETATTR64_REC))
615 reccookie->lgc_subsys = LLOG_MDS_OST_ORIG_CTXT;
616 else if (rec->lrh_type == OST_SZ_REC)
617 reccookie->lgc_subsys = LLOG_SIZE_ORIG_CTXT;
619 reccookie->lgc_subsys = -1;
624 /* cleanup llog for error case */
625 down_write(&loghandle->lgh_hdr_lock);
626 ext2_clear_bit(index, LLOG_HDR_BITMAP(llh));
628 up_write(&loghandle->lgh_hdr_lock);
630 /* restore llog last_idx */
631 loghandle->lgh_last_idx--;
632 LLOG_HDR_TAIL(llh)->lrt_index = loghandle->lgh_last_idx;
638 * We can skip reading at least as many log blocks as the number of
639 * minimum sized log records we are skipping. If it turns out
640 * that we are not far enough along the log (because the
641 * actual records are larger than minimum size) we just skip
644 static inline void llog_skip_over(struct llog_log_hdr *llh, __u64 *off,
645 int curr, int goal, __u32 chunk_size)
648 if (llh->llh_size == 0) {
649 /* variable size records */
650 *off = (*off + (goal - curr - 1) * LLOG_MIN_REC_SIZE);
652 *off = chunk_size + (goal - 1) * llh->llh_size;
655 /* always align with lower chunk boundary*/
656 *off &= ~(chunk_size - 1);
660 * Remove optional fields that the client doesn't expect.
661 * This is typically in order to ensure compatibility with older clients.
662 * It is assumed that since we exclusively remove fields, the block will be
663 * big enough to handle the remapped records. It is also assumed that records
664 * of a block have the same format (i.e.: the same features enabled).
666 * \param[in,out] hdr Header of the block of records to remap.
667 * \param[in,out] last_hdr Last header, don't read past this point.
668 * \param[in] flags Flags describing the fields to keep.
670 static void changelog_block_trim_ext(struct llog_rec_hdr *hdr,
671 struct llog_rec_hdr *last_hdr,
672 enum changelog_rec_flags flags)
674 if (hdr->lrh_type != CHANGELOG_REC)
678 struct changelog_rec *rec = (struct changelog_rec *)(hdr + 1);
680 changelog_remap_rec(rec, rec->cr_flags & flags);
681 hdr = llog_rec_hdr_next(hdr);
682 } while ((char *)hdr <= (char *)last_hdr);
686 * Implementation of the llog_operations::lop_next_block
688 * This function finds the the next llog block to return which contains
689 * record with required index. It is main part of llog processing.
691 * \param[in] env execution environment
692 * \param[in] loghandle llog handle of the current llog
693 * \param[in,out] cur_idx index preceeding cur_offset
694 * \param[in] next_idx target index to find
695 * \param[in,out] cur_offset furtherst point read in the file
696 * \param[in] buf pointer to data buffer to fill
697 * \param[in] len required len to read, it is
698 * usually llog chunk_size.
700 * \retval 0 on successful buffer read
701 * \retval negative value on error
703 static int llog_osd_next_block(const struct lu_env *env,
704 struct llog_handle *loghandle, int *cur_idx,
705 int next_idx, __u64 *cur_offset, void *buf,
708 struct llog_thread_info *lgi = llog_info(env);
710 struct dt_device *dt;
719 chunk_size = loghandle->lgh_hdr->llh_hdr.lrh_len;
720 if (len == 0 || len & (chunk_size - 1))
723 CDEBUG(D_OTHER, "looking for log index %u (cur idx %u off "LPU64")\n",
724 next_idx, *cur_idx, *cur_offset);
727 LASSERT(loghandle->lgh_ctxt);
729 o = loghandle->lgh_obj;
731 LASSERT(dt_object_exists(o));
732 dt = lu2dt_dev(o->do_lu.lo_dev);
735 rc = dt_attr_get(env, o, &lgi->lgi_attr);
739 while (*cur_offset < lgi->lgi_attr.la_size) {
740 struct llog_rec_hdr *rec, *last_rec;
741 struct llog_rec_tail *tail;
743 llog_skip_over(loghandle->lgh_hdr, cur_offset, *cur_idx,
744 next_idx, chunk_size);
746 /* read up to next llog chunk_size block */
747 lgi->lgi_buf.lb_len = chunk_size -
748 (*cur_offset & (chunk_size - 1));
749 lgi->lgi_buf.lb_buf = buf;
751 rc = dt_read(env, o, &lgi->lgi_buf, cur_offset);
753 CERROR("%s: can't read llog block from log "DFID
754 " offset "LPU64": rc = %d\n",
755 o->do_lu.lo_dev->ld_obd->obd_name,
756 PFID(lu_object_fid(&o->do_lu)), *cur_offset,
762 /* signal the end of the valid buffer to
764 memset(buf + rc, 0, len - rc);
767 if (rc == 0) /* end of file, nothing to do */
770 if (rc < sizeof(*tail)) {
771 CERROR("%s: invalid llog block at log id "DOSTID"/%u "
773 o->do_lu.lo_dev->ld_obd->obd_name,
774 POSTID(&loghandle->lgh_id.lgl_oi),
775 loghandle->lgh_id.lgl_ogen, *cur_offset);
776 GOTO(out, rc = -EINVAL);
780 if (LLOG_REC_HDR_NEEDS_SWABBING(rec))
781 lustre_swab_llog_rec(rec);
783 tail = (struct llog_rec_tail *)((char *)buf + rc -
784 sizeof(struct llog_rec_tail));
785 /* get the last record in block */
786 last_rec = (struct llog_rec_hdr *)((char *)buf + rc -
789 if (LLOG_REC_HDR_NEEDS_SWABBING(last_rec))
790 lustre_swab_llog_rec(last_rec);
791 LASSERT(last_rec->lrh_index == tail->lrt_index);
793 *cur_idx = tail->lrt_index;
795 /* this shouldn't happen */
796 if (tail->lrt_index == 0) {
797 CERROR("%s: invalid llog tail at log id "DOSTID"/%u "
799 o->do_lu.lo_dev->ld_obd->obd_name,
800 POSTID(&loghandle->lgh_id.lgl_oi),
801 loghandle->lgh_id.lgl_ogen, *cur_offset);
802 GOTO(out, rc = -EINVAL);
804 if (tail->lrt_index < next_idx)
807 /* sanity check that the start of the new buffer is no farther
808 * than the record that we wanted. This shouldn't happen. */
809 if (rec->lrh_index > next_idx) {
810 CERROR("%s: missed desired record? %u > %u\n",
811 o->do_lu.lo_dev->ld_obd->obd_name,
812 rec->lrh_index, next_idx);
813 GOTO(out, rc = -ENOENT);
816 /* Trim unsupported extensions for compat w/ older clients */
817 if (!(loghandle->lgh_hdr->llh_flags & LLOG_F_EXT_JOBID))
818 changelog_block_trim_ext(rec, last_rec,
819 CLF_VERSION | CLF_RENAME);
823 GOTO(out, rc = -EIO);
829 * Implementation of the llog_operations::lop_prev_block
831 * This function finds the llog block to return which contains
832 * record with required index but in reverse order - from end of llog
834 * It is main part of reverse llog processing.
836 * \param[in] env execution environment
837 * \param[in] loghandle llog handle of the current llog
838 * \param[in] prev_idx target index to find
839 * \param[in] buf pointer to data buffer to fill
840 * \param[in] len required len to read, it is llog_chunk_size usually.
842 * \retval 0 on successful buffer read
843 * \retval negative value on error
845 static int llog_osd_prev_block(const struct lu_env *env,
846 struct llog_handle *loghandle,
847 int prev_idx, void *buf, int len)
849 struct llog_thread_info *lgi = llog_info(env);
851 struct dt_device *dt;
858 chunk_size = loghandle->lgh_hdr->llh_hdr.lrh_len;
859 if (len == 0 || len & (chunk_size - 1))
862 CDEBUG(D_OTHER, "looking for log index %u\n", prev_idx);
865 LASSERT(loghandle->lgh_ctxt);
867 o = loghandle->lgh_obj;
869 LASSERT(dt_object_exists(o));
870 dt = lu2dt_dev(o->do_lu.lo_dev);
873 cur_offset = chunk_size;
874 llog_skip_over(loghandle->lgh_hdr, &cur_offset, 0, prev_idx,
877 rc = dt_attr_get(env, o, &lgi->lgi_attr);
881 while (cur_offset < lgi->lgi_attr.la_size) {
882 struct llog_rec_hdr *rec, *last_rec;
883 struct llog_rec_tail *tail;
885 lgi->lgi_buf.lb_len = len;
886 lgi->lgi_buf.lb_buf = buf;
887 rc = dt_read(env, o, &lgi->lgi_buf, &cur_offset);
889 CERROR("%s: can't read llog block from log "DFID
890 " offset "LPU64": rc = %d\n",
891 o->do_lu.lo_dev->ld_obd->obd_name,
892 PFID(lu_object_fid(&o->do_lu)), cur_offset, rc);
896 if (rc == 0) /* end of file, nothing to do */
899 if (rc < sizeof(*tail)) {
900 CERROR("%s: invalid llog block at log id "DOSTID"/%u "
902 o->do_lu.lo_dev->ld_obd->obd_name,
903 POSTID(&loghandle->lgh_id.lgl_oi),
904 loghandle->lgh_id.lgl_ogen, cur_offset);
905 GOTO(out, rc = -EINVAL);
909 if (LLOG_REC_HDR_NEEDS_SWABBING(rec))
910 lustre_swab_llog_rec(rec);
912 tail = (struct llog_rec_tail *)((char *)buf + rc -
913 sizeof(struct llog_rec_tail));
914 /* get the last record in block */
915 last_rec = (struct llog_rec_hdr *)((char *)buf + rc -
916 le32_to_cpu(tail->lrt_len));
918 if (LLOG_REC_HDR_NEEDS_SWABBING(last_rec))
919 lustre_swab_llog_rec(last_rec);
920 LASSERT(last_rec->lrh_index == tail->lrt_index);
922 /* this shouldn't happen */
923 if (tail->lrt_index == 0) {
924 CERROR("%s: invalid llog tail at log id "DOSTID"/%u "
926 o->do_lu.lo_dev->ld_obd->obd_name,
927 POSTID(&loghandle->lgh_id.lgl_oi),
928 loghandle->lgh_id.lgl_ogen, cur_offset);
929 GOTO(out, rc = -EINVAL);
931 if (tail->lrt_index < prev_idx)
934 /* sanity check that the start of the new buffer is no farther
935 * than the record that we wanted. This shouldn't happen. */
936 if (rec->lrh_index > prev_idx) {
937 CERROR("%s: missed desired record? %u > %u\n",
938 o->do_lu.lo_dev->ld_obd->obd_name,
939 rec->lrh_index, prev_idx);
940 GOTO(out, rc = -ENOENT);
943 /* Trim unsupported extensions for compat w/ older clients */
944 if (!(loghandle->lgh_hdr->llh_flags & LLOG_F_EXT_JOBID))
945 changelog_block_trim_ext(rec, last_rec,
946 CLF_VERSION | CLF_RENAME);
950 GOTO(out, rc = -EIO);
956 * This is helper function to get llog directory object. It is used by named
957 * llog operations to find/insert/delete llog entry from llog directory.
959 * \param[in] env execution environment
960 * \param[in] ctxt llog context
962 * \retval dt_object of llog directory
963 * \retval ERR_PTR of negative value on error
965 static struct dt_object *llog_osd_dir_get(const struct lu_env *env,
966 struct llog_ctxt *ctxt)
968 struct dt_device *dt;
969 struct dt_thread_info *dti = dt_info(env);
970 struct dt_object *dir;
973 dt = ctxt->loc_exp->exp_obd->obd_lvfs_ctxt.dt;
974 if (ctxt->loc_dir == NULL) {
975 rc = dt_root_get(env, dt, &dti->dti_fid);
978 dir = dt_locate(env, dt, &dti->dti_fid);
980 if (!IS_ERR(dir) && !dt_try_as_dir(env, dir)) {
981 lu_object_put(env, &dir->do_lu);
982 return ERR_PTR(-ENOTDIR);
985 lu_object_get(&ctxt->loc_dir->do_lu);
993 * Implementation of the llog_operations::lop_open
995 * This function opens the llog by its logid or by name, it may open also
996 * non existent llog and assing then new id to it.
997 * The llog_open/llog_close pair works similar to lu_object_find/put,
998 * the object may not exist prior open. The result of open is just dt_object
999 * in the llog header.
1001 * \param[in] env execution environment
1002 * \param[in] handle llog handle of the current llog
1003 * \param[in] logid logid of llog to open (nameless llog)
1004 * \param[in] name name of llog to open (named llog)
1005 * \param[in] open_param
1006 * LLOG_OPEN_NEW - new llog, may not exist
1007 * LLOG_OPEN_EXIST - old llog, must exist
1009 * \retval 0 on successful open, llog_handle::lgh_obj
1010 * contains the dt_object of the llog.
1011 * \retval negative value on error
1013 static int llog_osd_open(const struct lu_env *env, struct llog_handle *handle,
1014 struct llog_logid *logid, char *name,
1015 enum llog_open_param open_param)
1017 struct llog_thread_info *lgi = llog_info(env);
1018 struct llog_ctxt *ctxt = handle->lgh_ctxt;
1019 struct dt_object *o;
1020 struct dt_device *dt;
1021 struct ls_device *ls;
1022 struct local_oid_storage *los = NULL;
1029 LASSERT(ctxt->loc_exp);
1030 LASSERT(ctxt->loc_exp->exp_obd);
1031 dt = ctxt->loc_exp->exp_obd->obd_lvfs_ctxt.dt;
1033 if (ctxt->loc_flags & LLOG_CTXT_FLAG_NORMAL_FID) {
1034 if (logid != NULL) {
1035 logid_to_fid(logid, &lgi->lgi_fid);
1037 /* If logid == NULL, then it means the caller needs
1038 * to allocate new FID (llog_cat_declare_add_rec()). */
1039 rc = obd_fid_alloc(env, ctxt->loc_exp,
1040 &lgi->lgi_fid, NULL);
1046 o = dt_locate(env, dt, &lgi->lgi_fid);
1053 ls = ls_device_get(dt);
1055 RETURN(PTR_ERR(ls));
1057 mutex_lock(&ls->ls_los_mutex);
1058 los = dt_los_find(ls, name != NULL ? FID_SEQ_LLOG_NAME : FID_SEQ_LLOG);
1059 mutex_unlock(&ls->ls_los_mutex);
1061 ls_device_put(env, ls);
1065 if (logid != NULL) {
1066 logid_to_fid(logid, &lgi->lgi_fid);
1068 struct dt_object *llog_dir;
1070 llog_dir = llog_osd_dir_get(env, ctxt);
1071 if (IS_ERR(llog_dir))
1072 GOTO(out, rc = PTR_ERR(llog_dir));
1073 dt_read_lock(env, llog_dir, 0);
1074 rc = dt_lookup_dir(env, llog_dir, name, &lgi->lgi_fid);
1075 dt_read_unlock(env, llog_dir);
1076 lu_object_put(env, &llog_dir->do_lu);
1077 if (rc == -ENOENT && open_param == LLOG_OPEN_NEW) {
1078 /* generate fid for new llog */
1079 rc = local_object_fid_generate(env, los,
1084 OBD_ALLOC(handle->lgh_name, strlen(name) + 1);
1085 if (handle->lgh_name)
1086 strcpy(handle->lgh_name, name);
1088 GOTO(out, rc = -ENOMEM);
1090 LASSERTF(open_param & LLOG_OPEN_NEW, "%#x\n", open_param);
1091 /* generate fid for new llog */
1092 rc = local_object_fid_generate(env, los, &lgi->lgi_fid);
1097 o = ls_locate(env, ls, &lgi->lgi_fid, NULL);
1099 GOTO(out_name, rc = PTR_ERR(o));
1102 /* No new llog is expected but doesn't exist */
1103 if (open_param != LLOG_OPEN_NEW && !dt_object_exists(o))
1104 GOTO(out_put, rc = -ENOENT);
1106 fid_to_logid(&lgi->lgi_fid, &handle->lgh_id);
1107 handle->lgh_obj = o;
1108 handle->private_data = los;
1109 LASSERT(handle->lgh_ctxt);
1114 lu_object_put(env, &o->do_lu);
1116 if (handle->lgh_name != NULL)
1117 OBD_FREE(handle->lgh_name, strlen(name) + 1);
1125 * Implementation of the llog_operations::lop_exist
1127 * This function checks that llog exists on storage.
1129 * \param[in] handle llog handle of the current llog
1131 * \retval true if llog object exists and is not just destroyed
1132 * \retval false if llog doesn't exist or just destroyed
1134 static int llog_osd_exist(struct llog_handle *handle)
1136 LASSERT(handle->lgh_obj);
1137 return (dt_object_exists(handle->lgh_obj) &&
1138 !lu_object_is_dying(handle->lgh_obj->do_lu.lo_header));
1142 * Get dir for regular fid log object
1144 * Get directory for regular fid log object, and these regular fid log
1145 * object will be inserted under this directory, to satisfy the FS
1146 * consistency check, e2fsck etc.
1148 * \param [in] env execution environment
1149 * \param [in] dto llog object
1151 * \retval pointer to the directory if it is found.
1152 * \retval ERR_PTR(negative errno) if it fails.
1154 struct dt_object *llog_osd_get_regular_fid_dir(const struct lu_env *env,
1155 struct dt_object *dto)
1157 struct llog_thread_info *lgi = llog_info(env);
1158 struct seq_server_site *ss = dto->do_lu.lo_dev->ld_site->ld_seq_site;
1159 struct lu_seq_range *range = &lgi->lgi_range;
1160 struct lu_fid *dir_fid = &lgi->lgi_fid;
1161 struct dt_object *dir;
1165 fld_range_set_any(range);
1166 LASSERT(ss != NULL);
1167 rc = ss->ss_server_fld->lsf_seq_lookup(env, ss->ss_server_fld,
1168 fid_seq(lu_object_fid(&dto->do_lu)), range);
1170 RETURN(ERR_PTR(rc));
1172 lu_update_log_dir_fid(dir_fid, range->lsr_index);
1173 dir = dt_locate(env, lu2dt_dev(dto->do_lu.lo_dev), dir_fid);
1177 if (!dt_try_as_dir(env, dir)) {
1178 lu_object_put(env, &dir->do_lu);
1179 RETURN(ERR_PTR(-ENOTDIR));
1186 * Add llog object with regular FID to name entry
1188 * Add llog object with regular FID to name space, and each llog
1189 * object on each MDT will be /update_log_dir/[seq:oid:ver],
1190 * so to satisfy the namespace consistency check, e2fsck etc.
1192 * \param [in] env execution environment
1193 * \param [in] dto llog object
1194 * \param [in] th thandle
1195 * \param [in] declare if it is declare or execution
1197 * \retval 0 if insertion succeeds.
1198 * \retval negative errno if insertion fails.
1201 llog_osd_regular_fid_add_name_entry(const struct lu_env *env,
1202 struct dt_object *dto,
1203 struct thandle *th, bool declare)
1205 struct llog_thread_info *lgi = llog_info(env);
1206 const struct lu_fid *fid = lu_object_fid(&dto->do_lu);
1207 struct dt_insert_rec *rec = &lgi->lgi_dt_rec;
1208 struct dt_object *dir;
1209 char *name = lgi->lgi_name;
1213 if (!fid_is_norm(fid))
1216 dir = llog_osd_get_regular_fid_dir(env, dto);
1218 RETURN(PTR_ERR(dir));
1221 rec->rec_type = S_IFREG;
1222 snprintf(name, sizeof(lgi->lgi_name), DFID, PFID(fid));
1223 dt_write_lock(env, dir, 0);
1225 rc = dt_declare_insert(env, dir, (struct dt_rec *)rec,
1226 (struct dt_key *)name, th);
1228 rc = dt_insert(env, dir, (struct dt_rec *)rec,
1229 (struct dt_key *)name, th, 1);
1231 dt_write_unlock(env, dir);
1233 lu_object_put(env, &dir->do_lu);
1239 * Implementation of the llog_operations::lop_declare_create
1241 * This function declares the llog create. It declares also name insert
1242 * into llog directory in case of named llog.
1244 * \param[in] env execution environment
1245 * \param[in] res llog handle of the current llog
1246 * \param[in] th current transaction handle
1248 * \retval 0 on successful create declaration
1249 * \retval negative value on error
1251 static int llog_osd_declare_create(const struct lu_env *env,
1252 struct llog_handle *res, struct thandle *th)
1254 struct llog_thread_info *lgi = llog_info(env);
1255 struct dt_insert_rec *rec = &lgi->lgi_dt_rec;
1256 struct local_oid_storage *los;
1257 struct dt_object *o;
1262 LASSERT(res->lgh_obj);
1265 /* object can be created by another thread */
1267 if (dt_object_exists(o))
1270 if (res->lgh_ctxt->loc_flags & LLOG_CTXT_FLAG_NORMAL_FID) {
1271 struct llog_thread_info *lgi = llog_info(env);
1273 lgi->lgi_attr.la_valid = LA_MODE | LA_SIZE;
1274 lgi->lgi_attr.la_size = 0;
1275 lgi->lgi_attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
1276 lgi->lgi_dof.dof_type = dt_mode_to_dft(S_IFREG);
1278 rc = dt_declare_create(env, o, &lgi->lgi_attr, NULL,
1284 rc = llog_osd_regular_fid_add_name_entry(env, o, th, true);
1288 los = res->private_data;
1291 rc = llog_osd_declare_new_object(env, los, o, th);
1295 /* do not declare header initialization here as it's declared
1296 * in llog_osd_declare_write_rec() which is always called */
1298 if (res->lgh_name) {
1299 struct dt_object *llog_dir;
1301 llog_dir = llog_osd_dir_get(env, res->lgh_ctxt);
1302 if (IS_ERR(llog_dir))
1303 RETURN(PTR_ERR(llog_dir));
1304 logid_to_fid(&res->lgh_id, &lgi->lgi_fid);
1305 rec->rec_fid = &lgi->lgi_fid;
1306 rec->rec_type = S_IFREG;
1307 rc = dt_declare_insert(env, llog_dir,
1308 (struct dt_rec *)rec,
1309 (struct dt_key *)res->lgh_name, th);
1310 lu_object_put(env, &llog_dir->do_lu);
1312 CERROR("%s: can't declare named llog %s: rc = %d\n",
1313 o->do_lu.lo_dev->ld_obd->obd_name,
1320 * Implementation of the llog_operations::lop_create
1322 * This function creates the llog according with llog_handle::lgh_obj
1323 * and llog_handle::lgh_name.
1325 * \param[in] env execution environment
1326 * \param[in] res llog handle of the current llog
1327 * \param[in] th current transaction handle
1329 * \retval 0 on successful create
1330 * \retval negative value on error
1332 static int llog_osd_create(const struct lu_env *env, struct llog_handle *res,
1335 struct llog_thread_info *lgi = llog_info(env);
1336 struct dt_insert_rec *rec = &lgi->lgi_dt_rec;
1337 struct local_oid_storage *los;
1338 struct dt_object *o;
1347 /* llog can be already created */
1348 if (dt_object_exists(o))
1351 if (res->lgh_ctxt->loc_flags & LLOG_CTXT_FLAG_NORMAL_FID) {
1352 struct llog_thread_info *lgi = llog_info(env);
1354 lgi->lgi_attr.la_valid = LA_MODE | LA_SIZE | LA_TYPE;
1355 lgi->lgi_attr.la_size = 0;
1356 lgi->lgi_attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
1357 lgi->lgi_dof.dof_type = dt_mode_to_dft(S_IFREG);
1359 dt_write_lock(env, o, 0);
1360 rc = dt_create(env, o, &lgi->lgi_attr, NULL,
1362 dt_write_unlock(env, o);
1366 rc = llog_osd_regular_fid_add_name_entry(env, o, th, false);
1371 los = res->private_data;
1374 dt_write_lock(env, o, 0);
1375 if (!dt_object_exists(o))
1376 rc = llog_osd_create_new_object(env, los, o, th);
1380 dt_write_unlock(env, o);
1384 if (res->lgh_name) {
1385 struct dt_object *llog_dir;
1387 llog_dir = llog_osd_dir_get(env, res->lgh_ctxt);
1388 if (IS_ERR(llog_dir))
1389 RETURN(PTR_ERR(llog_dir));
1391 logid_to_fid(&res->lgh_id, &lgi->lgi_fid);
1392 rec->rec_fid = &lgi->lgi_fid;
1393 rec->rec_type = S_IFREG;
1394 dt_read_lock(env, llog_dir, 0);
1395 rc = dt_insert(env, llog_dir, (struct dt_rec *)rec,
1396 (struct dt_key *)res->lgh_name,
1398 dt_read_unlock(env, llog_dir);
1399 lu_object_put(env, &llog_dir->do_lu);
1401 CERROR("%s: can't create named llog %s: rc = %d\n",
1402 o->do_lu.lo_dev->ld_obd->obd_name,
1409 * Implementation of the llog_operations::lop_close
1411 * This function closes the llog. It just put llog object and referenced
1414 * \param[in] env execution environment
1415 * \param[in] handle llog handle of the current llog
1417 * \retval 0 on successful llog close
1418 * \retval negative value on error
1420 static int llog_osd_close(const struct lu_env *env, struct llog_handle *handle)
1422 struct local_oid_storage *los;
1427 LASSERT(handle->lgh_obj);
1429 if (handle->lgh_ctxt->loc_flags & LLOG_CTXT_FLAG_NORMAL_FID) {
1430 /* Remove the object from the cache, otherwise it may
1431 * hold LOD being released during cleanup process */
1432 lu_object_put_nocache(env, &handle->lgh_obj->do_lu);
1433 LASSERT(handle->private_data == NULL);
1436 lu_object_put(env, &handle->lgh_obj->do_lu);
1438 los = handle->private_data;
1442 if (handle->lgh_name)
1443 OBD_FREE(handle->lgh_name, strlen(handle->lgh_name) + 1);
1449 * delete llog object name entry
1451 * Delete llog object (with regular FID) from name space (under
1454 * \param [in] env execution environment
1455 * \param [in] dto llog object
1456 * \param [in] th thandle
1457 * \param [in] declare if it is declare or execution
1459 * \retval 0 if deletion succeeds.
1460 * \retval negative errno if deletion fails.
1463 llog_osd_regular_fid_del_name_entry(const struct lu_env *env,
1464 struct dt_object *dto,
1465 struct thandle *th, bool declare)
1467 struct llog_thread_info *lgi = llog_info(env);
1468 const struct lu_fid *fid = lu_object_fid(&dto->do_lu);
1469 struct dt_object *dir;
1470 char *name = lgi->lgi_name;
1474 if (!fid_is_norm(fid))
1477 dir = llog_osd_get_regular_fid_dir(env, dto);
1479 RETURN(PTR_ERR(dir));
1481 snprintf(name, sizeof(lgi->lgi_name), DFID, PFID(fid));
1482 dt_write_lock(env, dir, 0);
1484 rc = dt_declare_delete(env, dir, (struct dt_key *)name,
1487 rc = dt_delete(env, dir, (struct dt_key *)name, th);
1489 dt_write_unlock(env, dir);
1491 lu_object_put(env, &dir->do_lu);
1497 * Implementation of the llog_operations::lop_destroy
1499 * This function destroys the llog and deletes also entry in the
1500 * llog directory in case of named llog. Llog should be opened prior that.
1501 * Destroy method is not part of external transaction and does everything
1504 * \param[in] env execution environment
1505 * \param[in] loghandle llog handle of the current llog
1507 * \retval 0 on successful destroy
1508 * \retval negative value on error
1510 static int llog_osd_destroy(const struct lu_env *env,
1511 struct llog_handle *loghandle)
1513 struct llog_ctxt *ctxt;
1514 struct dt_object *o, *llog_dir = NULL;
1515 struct dt_device *d;
1522 ctxt = loghandle->lgh_ctxt;
1525 o = loghandle->lgh_obj;
1528 d = lu2dt_dev(o->do_lu.lo_dev);
1530 LASSERT(d == ctxt->loc_exp->exp_obd->obd_lvfs_ctxt.dt);
1532 th = dt_trans_create(env, d);
1534 RETURN(PTR_ERR(th));
1536 if (loghandle->lgh_name) {
1537 llog_dir = llog_osd_dir_get(env, ctxt);
1538 if (IS_ERR(llog_dir))
1539 GOTO(out_trans, rc = PTR_ERR(llog_dir));
1541 name = loghandle->lgh_name;
1542 rc = dt_declare_delete(env, llog_dir,
1543 (struct dt_key *)name, th);
1545 GOTO(out_trans, rc);
1548 rc = dt_declare_ref_del(env, o, th);
1550 GOTO(out_trans, rc);
1552 rc = dt_declare_destroy(env, o, th);
1554 GOTO(out_trans, rc);
1556 if (loghandle->lgh_ctxt->loc_flags & LLOG_CTXT_FLAG_NORMAL_FID) {
1557 rc = llog_osd_regular_fid_del_name_entry(env, o, th, true);
1559 GOTO(out_trans, rc);
1562 rc = dt_trans_start_local(env, d, th);
1564 GOTO(out_trans, rc);
1566 th->th_wait_submit = 1;
1568 dt_write_lock(env, o, 0);
1569 if (dt_object_exists(o)) {
1571 dt_read_lock(env, llog_dir, 0);
1572 rc = dt_delete(env, llog_dir,
1573 (struct dt_key *) name,
1575 dt_read_unlock(env, llog_dir);
1577 CERROR("%s: can't remove llog %s: rc = %d\n",
1578 o->do_lu.lo_dev->ld_obd->obd_name,
1580 GOTO(out_unlock, rc);
1583 dt_ref_del(env, o, th);
1584 rc = dt_destroy(env, o, th);
1586 GOTO(out_unlock, rc);
1588 if (loghandle->lgh_ctxt->loc_flags &
1589 LLOG_CTXT_FLAG_NORMAL_FID) {
1590 rc = llog_osd_regular_fid_del_name_entry(env, o, th,
1593 GOTO(out_unlock, rc);
1597 dt_write_unlock(env, o);
1599 dt_trans_stop(env, d, th);
1600 if (!(IS_ERR_OR_NULL(llog_dir)))
1601 lu_object_put(env, &llog_dir->do_lu);
1606 * Implementation of the llog_operations::lop_setup
1608 * This function setup the llog on local storage.
1610 * \param[in] env execution environment
1611 * \param[in] obd obd device the llog belongs to
1612 * \param[in] olg the llog group, it is always zero group now.
1613 * \param[in] ctxt_idx the llog index, it defines the purpose of this llog.
1614 * Every new llog type have to use own index.
1615 * \param[in] disk_obd the storage obd, where llog is stored.
1617 * \retval 0 on successful llog setup
1618 * \retval negative value on error
1620 static int llog_osd_setup(const struct lu_env *env, struct obd_device *obd,
1621 struct obd_llog_group *olg, int ctxt_idx,
1622 struct obd_device *disk_obd)
1624 struct llog_thread_info *lgi = llog_info(env);
1625 struct llog_ctxt *ctxt;
1630 LASSERT(olg->olg_ctxts[ctxt_idx]);
1632 ctxt = llog_ctxt_get(olg->olg_ctxts[ctxt_idx]);
1635 if (disk_obd == NULL)
1638 /* initialize data allowing to generate new fids,
1639 * literally we need a sequece */
1640 lgi->lgi_fid.f_seq = FID_SEQ_LLOG;
1641 lgi->lgi_fid.f_oid = 1;
1642 lgi->lgi_fid.f_ver = 0;
1643 rc = local_oid_storage_init(env, disk_obd->obd_lvfs_ctxt.dt,
1645 &ctxt->loc_los_nameless);
1649 lgi->lgi_fid.f_seq = FID_SEQ_LLOG_NAME;
1650 lgi->lgi_fid.f_oid = 1;
1651 lgi->lgi_fid.f_ver = 0;
1652 rc = local_oid_storage_init(env, disk_obd->obd_lvfs_ctxt.dt,
1654 &ctxt->loc_los_named);
1656 local_oid_storage_fini(env, ctxt->loc_los_nameless);
1657 ctxt->loc_los_nameless = NULL;
1663 llog_ctxt_put(ctxt);
1668 * Implementation of the llog_operations::lop_cleanup
1670 * This function cleanups the llog on local storage.
1672 * \param[in] env execution environment
1673 * \param[in] ctxt the llog context
1677 static int llog_osd_cleanup(const struct lu_env *env, struct llog_ctxt *ctxt)
1679 if (ctxt->loc_los_nameless != NULL) {
1680 local_oid_storage_fini(env, ctxt->loc_los_nameless);
1681 ctxt->loc_los_nameless = NULL;
1684 if (ctxt->loc_los_named != NULL) {
1685 local_oid_storage_fini(env, ctxt->loc_los_named);
1686 ctxt->loc_los_named = NULL;
1692 struct llog_operations llog_osd_ops = {
1693 .lop_next_block = llog_osd_next_block,
1694 .lop_prev_block = llog_osd_prev_block,
1695 .lop_read_header = llog_osd_read_header,
1696 .lop_destroy = llog_osd_destroy,
1697 .lop_setup = llog_osd_setup,
1698 .lop_cleanup = llog_osd_cleanup,
1699 .lop_open = llog_osd_open,
1700 .lop_exist = llog_osd_exist,
1701 .lop_declare_create = llog_osd_declare_create,
1702 .lop_create = llog_osd_create,
1703 .lop_declare_write_rec = llog_osd_declare_write_rec,
1704 .lop_write_rec = llog_osd_write_rec,
1705 .lop_close = llog_osd_close,
1707 EXPORT_SYMBOL(llog_osd_ops);
1709 struct llog_operations llog_common_cat_ops = {
1710 .lop_next_block = llog_osd_next_block,
1711 .lop_prev_block = llog_osd_prev_block,
1712 .lop_read_header = llog_osd_read_header,
1713 .lop_destroy = llog_osd_destroy,
1714 .lop_setup = llog_osd_setup,
1715 .lop_cleanup = llog_osd_cleanup,
1716 .lop_open = llog_osd_open,
1717 .lop_exist = llog_osd_exist,
1718 .lop_declare_create = llog_osd_declare_create,
1719 .lop_create = llog_osd_create,
1720 .lop_declare_write_rec = llog_osd_declare_write_rec,
1721 .lop_write_rec = llog_osd_write_rec,
1722 .lop_close = llog_osd_close,
1723 .lop_add = llog_cat_add_rec,
1724 .lop_declare_add = llog_cat_declare_add_rec,
1726 EXPORT_SYMBOL(llog_common_cat_ops);
1729 * Read the special file which contains the list of llog catalogs IDs
1731 * This function reads the CATALOGS file which contains the array of llog
1732 * catalogs IDs. The main purpose of this file is to store OSP llogs indexed
1733 * by OST/MDT number.
1735 * \param[in] env execution environment
1736 * \param[in] d corresponding storage device
1737 * \param[in] idx position to start from, usually OST/MDT index
1738 * \param[in] count how many catalog IDs to read
1739 * \param[out] idarray the buffer for the data. If it is NULL then
1740 * function returns just number of catalog IDs
1742 * \param[in] fid LLOG_CATALOGS_OID for CATALOG object
1744 * \retval 0 on successful read of catalog IDs
1745 * \retval negative value on error
1746 * \retval positive value which is number of records in
1747 * the file if \a idarray is NULL
1749 int llog_osd_get_cat_list(const struct lu_env *env, struct dt_device *d,
1750 int idx, int count, struct llog_catid *idarray,
1751 const struct lu_fid *fid)
1753 struct llog_thread_info *lgi = llog_info(env);
1754 struct dt_object *o = NULL;
1762 size = sizeof(*idarray) * count;
1763 lgi->lgi_off = idx * sizeof(*idarray);
1765 lgi->lgi_fid = *fid;
1766 o = dt_locate(env, d, &lgi->lgi_fid);
1770 if (!dt_object_exists(o)) {
1771 th = dt_trans_create(env, d);
1773 GOTO(out, rc = PTR_ERR(th));
1775 lgi->lgi_attr.la_valid = LA_MODE;
1776 lgi->lgi_attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
1777 lgi->lgi_dof.dof_type = dt_mode_to_dft(S_IFREG);
1779 th->th_wait_submit = 1;
1780 /* Make the llog object creation synchronization, so
1781 * it will be reliable to the reference, especially
1782 * for remote reference */
1785 rc = dt_declare_create(env, o, &lgi->lgi_attr, NULL,
1788 GOTO(out_trans, rc);
1790 rc = dt_trans_start_local(env, d, th);
1792 GOTO(out_trans, rc);
1794 dt_write_lock(env, o, 0);
1795 if (!dt_object_exists(o))
1796 rc = dt_create(env, o, &lgi->lgi_attr, NULL,
1798 dt_write_unlock(env, o);
1800 dt_trans_stop(env, d, th);
1805 rc = dt_attr_get(env, o, &lgi->lgi_attr);
1809 if (!S_ISREG(lgi->lgi_attr.la_mode)) {
1810 CERROR("%s: CATALOGS is not a regular file!: mode = %o\n",
1811 o->do_lu.lo_dev->ld_obd->obd_name,
1812 lgi->lgi_attr.la_mode);
1813 GOTO(out, rc = -ENOENT);
1816 CDEBUG(D_CONFIG, "cat list: disk size=%d, read=%d\n",
1817 (int)lgi->lgi_attr.la_size, size);
1819 /* return just number of llogs */
1820 if (idarray == NULL) {
1821 rc = lgi->lgi_attr.la_size / sizeof(*idarray);
1825 /* read for new ost index or for empty file */
1826 memset(idarray, 0, size);
1827 if (lgi->lgi_attr.la_size <= lgi->lgi_off)
1829 if (lgi->lgi_attr.la_size < lgi->lgi_off + size)
1830 size = lgi->lgi_attr.la_size - lgi->lgi_off;
1832 lgi->lgi_buf.lb_buf = idarray;
1833 lgi->lgi_buf.lb_len = size;
1834 rc = dt_record_read(env, o, &lgi->lgi_buf, &lgi->lgi_off);
1835 /* -EFAULT means the llog is a sparse file. This is not an error
1836 * after arbitrary OST index is supported. */
1837 if (rc < 0 && rc != -EFAULT) {
1838 CERROR("%s: error reading CATALOGS: rc = %d\n",
1839 o->do_lu.lo_dev->ld_obd->obd_name, rc);
1845 lu_object_put(env, &o->do_lu);
1848 EXPORT_SYMBOL(llog_osd_get_cat_list);
1851 * Write the special file which contains the list of llog catalogs IDs
1853 * This function writes the CATALOG file which contains the array of llog
1854 * catalogs IDs. It is used mostly to store OSP llogs indexed by OST/MDT
1857 * \param[in] env execution environment
1858 * \param[in] d corresponding storage device
1859 * \param[in] idx position to start from, usually OST/MDT index
1860 * \param[in] count how many catalog IDs to write
1861 * \param[out] idarray the buffer with the data to write.
1862 * \param[in] fid LLOG_CATALOGS_OID for CATALOG object
1864 * \retval 0 on successful write of catalog IDs
1865 * \retval negative value on error
1867 int llog_osd_put_cat_list(const struct lu_env *env, struct dt_device *d,
1868 int idx, int count, struct llog_catid *idarray,
1869 const struct lu_fid *fid)
1871 struct llog_thread_info *lgi = llog_info(env);
1872 struct dt_object *o = NULL;
1881 size = sizeof(*idarray) * count;
1882 lgi->lgi_off = idx * sizeof(*idarray);
1883 lgi->lgi_fid = *fid;
1885 o = dt_locate(env, d, &lgi->lgi_fid);
1889 if (!dt_object_exists(o))
1890 GOTO(out, rc = -ENOENT);
1892 rc = dt_attr_get(env, o, &lgi->lgi_attr);
1896 if (!S_ISREG(lgi->lgi_attr.la_mode)) {
1897 CERROR("%s: CATALOGS is not a regular file!: mode = %o\n",
1898 o->do_lu.lo_dev->ld_obd->obd_name,
1899 lgi->lgi_attr.la_mode);
1900 GOTO(out, rc = -ENOENT);
1903 th = dt_trans_create(env, d);
1905 GOTO(out, rc = PTR_ERR(th));
1907 lgi->lgi_buf.lb_len = size;
1908 lgi->lgi_buf.lb_buf = idarray;
1909 rc = dt_declare_record_write(env, o, &lgi->lgi_buf, lgi->lgi_off, th);
1913 rc = dt_trans_start_local(env, d, th);
1915 GOTO(out_trans, rc);
1917 th->th_wait_submit = 1;
1919 rc = dt_record_write(env, o, &lgi->lgi_buf, &lgi->lgi_off, th);
1921 CDEBUG(D_INODE, "can't write CATALOGS at index %d: rc = %d\n",
1924 dt_trans_stop(env, d, th);
1926 lu_object_put(env, &o->do_lu);
1929 EXPORT_SYMBOL(llog_osd_put_cat_list);