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.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2012, 2013, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/obdclass/llog_osd.c - low level llog routines on top of OSD API
38 * Author: Alexey Zhuravlev <alexey.zhuravlev@intel.com>
39 * Author: Mikhail Pershin <mike.pershin@intel.com>
42 #define DEBUG_SUBSYSTEM S_LOG
45 #include <obd_class.h>
46 #include <lustre_fid.h>
47 #include <dt_object.h>
49 #include "llog_internal.h"
50 #include "local_storage.h"
53 * - multi-chunks or big-declaration approach
54 * - use unique sequence instead of llog sb tracking unique ids
55 * - re-use existing environment
56 * - named llog support (can be used for testing only at the present)
57 * - llog_origin_connect() work with OSD API
60 static int llog_osd_declare_new_object(const struct lu_env *env,
61 struct local_oid_storage *los,
65 struct llog_thread_info *lgi = llog_info(env);
67 lgi->lgi_attr.la_valid = LA_MODE;
68 lgi->lgi_attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
69 lgi->lgi_dof.dof_type = dt_mode_to_dft(S_IFREG);
71 return local_object_declare_create(env, los, o, &lgi->lgi_attr,
75 static int llog_osd_create_new_object(const struct lu_env *env,
76 struct local_oid_storage *los,
80 struct llog_thread_info *lgi = llog_info(env);
82 lgi->lgi_attr.la_valid = LA_MODE;
83 lgi->lgi_attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
84 lgi->lgi_dof.dof_type = dt_mode_to_dft(S_IFREG);
86 return local_object_create(env, los, o, &lgi->lgi_attr,
90 static int llog_osd_pad(const struct lu_env *env, struct dt_object *o,
91 loff_t *off, int len, int index, struct thandle *th)
93 struct llog_thread_info *lgi = llog_info(env);
100 LASSERT(len >= LLOG_MIN_REC_SIZE && (len & 0x7) == 0);
102 lgi->lgi_tail.lrt_len = lgi->lgi_lrh.lrh_len = len;
103 lgi->lgi_tail.lrt_index = lgi->lgi_lrh.lrh_index = index;
104 lgi->lgi_lrh.lrh_type = LLOG_PAD_MAGIC;
106 lgi->lgi_buf.lb_buf = &lgi->lgi_lrh;
107 lgi->lgi_buf.lb_len = sizeof(lgi->lgi_lrh);
108 dt_write_lock(env, o, 0);
109 rc = dt_record_write(env, o, &lgi->lgi_buf, off, th);
111 CERROR("%s: error writing padding record: rc = %d\n",
112 o->do_lu.lo_dev->ld_obd->obd_name, rc);
116 lgi->lgi_buf.lb_buf = &lgi->lgi_tail;
117 lgi->lgi_buf.lb_len = sizeof(lgi->lgi_tail);
118 *off += len - sizeof(lgi->lgi_lrh) - sizeof(lgi->lgi_tail);
119 rc = dt_record_write(env, o, &lgi->lgi_buf, off, th);
121 CERROR("%s: error writing padding record: rc = %d\n",
122 o->do_lu.lo_dev->ld_obd->obd_name, rc);
124 dt_write_unlock(env, o);
128 static int llog_osd_write_blob(const struct lu_env *env, struct dt_object *o,
129 struct llog_rec_hdr *rec, void *buf,
130 loff_t *off, struct thandle *th)
132 struct llog_thread_info *lgi = llog_info(env);
133 int buflen = rec->lrh_len;
142 CWARN("0-length record\n");
144 CDEBUG(D_OTHER, "write blob with type %x, buf %p/%u at off %llu\n",
145 rec->lrh_type, buf, buflen, *off);
147 lgi->lgi_attr.la_valid = LA_SIZE;
148 lgi->lgi_attr.la_size = *off;
151 lgi->lgi_buf.lb_len = buflen;
152 lgi->lgi_buf.lb_buf = rec;
153 rc = dt_record_write(env, o, &lgi->lgi_buf, off, th);
155 CERROR("%s: error writing log record: rc = %d\n",
156 o->do_lu.lo_dev->ld_obd->obd_name, rc);
161 /* protect the following 3 writes from concurrent read */
162 dt_write_lock(env, o, 0);
163 rec->lrh_len = sizeof(*rec) + buflen + sizeof(lgi->lgi_tail);
164 lgi->lgi_buf.lb_len = sizeof(*rec);
165 lgi->lgi_buf.lb_buf = rec;
166 rc = dt_record_write(env, o, &lgi->lgi_buf, off, th);
168 CERROR("%s: error writing log hdr: rc = %d\n",
169 o->do_lu.lo_dev->ld_obd->obd_name, rc);
170 GOTO(out_unlock, rc);
173 lgi->lgi_buf.lb_len = buflen;
174 lgi->lgi_buf.lb_buf = buf;
175 rc = dt_record_write(env, o, &lgi->lgi_buf, off, th);
177 CERROR("%s: error writing log buffer: rc = %d\n",
178 o->do_lu.lo_dev->ld_obd->obd_name, rc);
179 GOTO(out_unlock, rc);
182 lgi->lgi_tail.lrt_len = rec->lrh_len;
183 lgi->lgi_tail.lrt_index = rec->lrh_index;
184 lgi->lgi_buf.lb_len = sizeof(lgi->lgi_tail);
185 lgi->lgi_buf.lb_buf = &lgi->lgi_tail;
186 rc = dt_record_write(env, o, &lgi->lgi_buf, off, th);
188 CERROR("%s: error writing log tail: rc = %d\n",
189 o->do_lu.lo_dev->ld_obd->obd_name, rc);
192 dt_write_unlock(env, o);
195 /* cleanup the content written above */
197 dt_punch(env, o, lgi->lgi_attr.la_size, OBD_OBJECT_EOF, th,
199 dt_attr_set(env, o, &lgi->lgi_attr, th, BYPASS_CAPA);
205 static int llog_osd_read_header(const struct lu_env *env,
206 struct llog_handle *handle)
208 struct llog_rec_hdr *llh_hdr;
210 struct llog_thread_info *lgi;
215 LASSERT(sizeof(*handle->lgh_hdr) == LLOG_CHUNK_SIZE);
220 lgi = llog_info(env);
222 rc = dt_attr_get(env, o, &lgi->lgi_attr, NULL);
226 LASSERT(lgi->lgi_attr.la_valid & LA_SIZE);
228 if (lgi->lgi_attr.la_size == 0) {
229 CDEBUG(D_HA, "not reading header from 0-byte log\n");
234 lgi->lgi_buf.lb_buf = handle->lgh_hdr;
235 lgi->lgi_buf.lb_len = LLOG_CHUNK_SIZE;
237 rc = dt_record_read(env, o, &lgi->lgi_buf, &lgi->lgi_off);
239 CERROR("%s: error reading log header from "DFID": rc = %d\n",
240 o->do_lu.lo_dev->ld_obd->obd_name,
241 PFID(lu_object_fid(&o->do_lu)), rc);
245 llh_hdr = &handle->lgh_hdr->llh_hdr;
246 if (LLOG_REC_HDR_NEEDS_SWABBING(llh_hdr))
247 lustre_swab_llog_hdr(handle->lgh_hdr);
249 if (llh_hdr->lrh_type != LLOG_HDR_MAGIC) {
250 CERROR("%s: bad log %s "DFID" header magic: %#x "
251 "(expected %#x)\n", o->do_lu.lo_dev->ld_obd->obd_name,
252 handle->lgh_name ? handle->lgh_name : "",
253 PFID(lu_object_fid(&o->do_lu)),
254 llh_hdr->lrh_type, LLOG_HDR_MAGIC);
256 } else if (llh_hdr->lrh_len != LLOG_CHUNK_SIZE) {
257 CERROR("%s: incorrectly sized log %s "DFID" header: "
258 "%#x (expected %#x)\n"
259 "you may need to re-run lconf --write_conf.\n",
260 o->do_lu.lo_dev->ld_obd->obd_name,
261 handle->lgh_name ? handle->lgh_name : "",
262 PFID(lu_object_fid(&o->do_lu)),
263 llh_hdr->lrh_len, LLOG_CHUNK_SIZE);
267 handle->lgh_last_idx = handle->lgh_hdr->llh_tail.lrt_index;
272 static int llog_osd_declare_write_rec(const struct lu_env *env,
273 struct llog_handle *loghandle,
274 struct llog_rec_hdr *rec,
275 int idx, struct thandle *th)
277 struct llog_thread_info *lgi = llog_info(env);
287 o = loghandle->lgh_obj;
290 lgi->lgi_buf.lb_len = sizeof(struct llog_log_hdr);
291 lgi->lgi_buf.lb_buf = NULL;
292 /* each time we update header */
293 rc = dt_declare_record_write(env, o, &lgi->lgi_buf, 0,
295 if (rc || idx == 0) /* if error or just header */
298 if (dt_object_exists(o)) {
299 rc = dt_attr_get(env, o, &lgi->lgi_attr, BYPASS_CAPA);
300 lgi->lgi_off = lgi->lgi_attr.la_size;
301 LASSERT(ergo(rc == 0, lgi->lgi_attr.la_valid & LA_SIZE));
305 rc = dt_declare_punch(env, o, lgi->lgi_off, OBD_OBJECT_EOF, th);
312 lgi->lgi_buf.lb_len = 32 * 1024;
313 lgi->lgi_buf.lb_buf = NULL;
314 /* XXX: implement declared window or multi-chunks approach */
315 rc = dt_declare_record_write(env, o, &lgi->lgi_buf, lgi->lgi_off, th);
320 /* returns negative in on error; 0 if success && reccookie == 0; 1 otherwise */
321 /* appends if idx == -1, otherwise overwrites record idx. */
322 static int llog_osd_write_rec(const struct lu_env *env,
323 struct llog_handle *loghandle,
324 struct llog_rec_hdr *rec,
325 struct llog_cookie *reccookie, int cookiecount,
326 void *buf, int idx, struct thandle *th)
328 struct llog_thread_info *lgi = llog_info(env);
329 struct llog_log_hdr *llh;
330 int reclen = rec->lrh_len;
331 int index, rc, old_tail_idx;
332 struct llog_rec_tail *lrt;
339 llh = loghandle->lgh_hdr;
341 o = loghandle->lgh_obj;
345 CDEBUG(D_OTHER, "new record %x to "DFID"\n",
346 rec->lrh_type, PFID(lu_object_fid(&o->do_lu)));
348 /* record length should not bigger than LLOG_CHUNK_SIZE */
350 rc = (reclen > LLOG_CHUNK_SIZE - sizeof(struct llog_rec_hdr) -
351 sizeof(struct llog_rec_tail)) ? -E2BIG : 0;
353 rc = (reclen > LLOG_CHUNK_SIZE) ? -E2BIG : 0;
357 rc = dt_attr_get(env, o, &lgi->lgi_attr, NULL);
362 /* write_blob adds header and tail to lrh_len. */
363 reclen = sizeof(*rec) + rec->lrh_len +
364 sizeof(struct llog_rec_tail);
367 /* no header: only allowed to insert record 1 */
368 if (idx != 1 && lgi->lgi_attr.la_size == 0)
371 if (idx && llh->llh_size && llh->llh_size != rec->lrh_len)
374 if (!ext2_test_bit(idx, llh->llh_bitmap))
375 CERROR("%s: modify unset record %u\n",
376 o->do_lu.lo_dev->ld_obd->obd_name, idx);
377 if (idx != rec->lrh_index)
378 CERROR("%s: index mismatch %d %u\n",
379 o->do_lu.lo_dev->ld_obd->obd_name, idx,
383 rc = llog_osd_write_blob(env, o, &llh->llh_hdr, NULL,
385 /* we are done if we only write the header or on error */
390 /* We assume that caller has set lgh_cur_* */
391 lgi->lgi_off = loghandle->lgh_cur_offset;
393 "modify record "DOSTID": idx:%d/%u/%d, len:%u "
395 POSTID(&loghandle->lgh_id.lgl_oi), idx,
397 loghandle->lgh_cur_idx, rec->lrh_len,
398 (long long)(lgi->lgi_off - sizeof(*llh)));
399 if (rec->lrh_index != loghandle->lgh_cur_idx) {
400 CERROR("%s: modify idx mismatch %u/%d\n",
401 o->do_lu.lo_dev->ld_obd->obd_name, idx,
402 loghandle->lgh_cur_idx);
406 /* Assumes constant lrh_len */
407 lgi->lgi_off = sizeof(*llh) + (idx - 1) * reclen;
410 rc = llog_osd_write_blob(env, o, rec, buf, &lgi->lgi_off, th);
411 if (rc == 0 && reccookie) {
412 reccookie->lgc_lgl = loghandle->lgh_id;
413 reccookie->lgc_index = idx;
419 /* Make sure that records don't cross a chunk boundary, so we can
420 * process them page-at-a-time if needed. If it will cross a chunk
421 * boundary, write in a fake (but referenced) entry to pad the chunk.
423 * We know that llog_current_log() will return a loghandle that is
424 * big enough to hold reclen, so all we care about is padding here.
426 LASSERT(lgi->lgi_attr.la_valid & LA_SIZE);
427 lgi->lgi_off = lgi->lgi_attr.la_size;
428 left = LLOG_CHUNK_SIZE - (lgi->lgi_off & (LLOG_CHUNK_SIZE - 1));
429 /* NOTE: padding is a record, but no bit is set */
430 if (left != 0 && left != reclen &&
431 left < (reclen + LLOG_MIN_REC_SIZE)) {
432 index = loghandle->lgh_last_idx + 1;
433 rc = llog_osd_pad(env, o, &lgi->lgi_off, left, index, th);
436 loghandle->lgh_last_idx++; /*for pad rec*/
438 /* if it's the last idx in log file, then return -ENOSPC */
439 if (loghandle->lgh_last_idx >= LLOG_BITMAP_SIZE(llh) - 1)
442 loghandle->lgh_last_idx++;
443 index = loghandle->lgh_last_idx;
444 LASSERT(index < LLOG_BITMAP_SIZE(llh));
445 rec->lrh_index = index;
447 lrt = (struct llog_rec_tail *)((char *)rec + rec->lrh_len -
449 lrt->lrt_len = rec->lrh_len;
450 lrt->lrt_index = rec->lrh_index;
452 /* The caller should make sure only 1 process access the lgh_last_idx,
453 * Otherwise it might hit the assert.*/
454 LASSERT(index < LLOG_BITMAP_SIZE(llh));
455 spin_lock(&loghandle->lgh_hdr_lock);
456 if (ext2_set_bit(index, llh->llh_bitmap)) {
457 CERROR("%s: index %u already set in log bitmap\n",
458 o->do_lu.lo_dev->ld_obd->obd_name, index);
459 spin_unlock(&loghandle->lgh_hdr_lock);
460 LBUG(); /* should never happen */
463 spin_unlock(&loghandle->lgh_hdr_lock);
464 old_tail_idx = llh->llh_tail.lrt_index;
465 llh->llh_tail.lrt_index = index;
468 rc = llog_osd_write_blob(env, o, &llh->llh_hdr, NULL, &lgi->lgi_off,
473 rc = dt_attr_get(env, o, &lgi->lgi_attr, NULL);
477 LASSERT(lgi->lgi_attr.la_valid & LA_SIZE);
478 lgi->lgi_off = lgi->lgi_attr.la_size;
480 rc = llog_osd_write_blob(env, o, rec, buf, &lgi->lgi_off, th);
483 /* cleanup llog for error case */
485 spin_lock(&loghandle->lgh_hdr_lock);
486 ext2_clear_bit(index, llh->llh_bitmap);
488 spin_unlock(&loghandle->lgh_hdr_lock);
490 /* restore the header */
491 loghandle->lgh_last_idx--;
492 llh->llh_tail.lrt_index = old_tail_idx;
494 llog_osd_write_blob(env, o, &llh->llh_hdr, NULL,
498 CDEBUG(D_RPCTRACE, "added record "DOSTID": idx: %u, %u\n",
499 POSTID(&loghandle->lgh_id.lgl_oi), index, rec->lrh_len);
500 if (rc == 0 && reccookie) {
501 reccookie->lgc_lgl = loghandle->lgh_id;
502 reccookie->lgc_index = index;
503 if ((rec->lrh_type == MDS_UNLINK_REC) ||
504 (rec->lrh_type == MDS_SETATTR64_REC))
505 reccookie->lgc_subsys = LLOG_MDS_OST_ORIG_CTXT;
506 else if (rec->lrh_type == OST_SZ_REC)
507 reccookie->lgc_subsys = LLOG_SIZE_ORIG_CTXT;
509 reccookie->lgc_subsys = -1;
515 /* We can skip reading at least as many log blocks as the number of
516 * minimum sized log records we are skipping. If it turns out
517 * that we are not far enough along the log (because the
518 * actual records are larger than minimum size) we just skip
521 static void llog_skip_over(__u64 *off, int curr, int goal)
525 *off = (*off + (goal - curr - 1) * LLOG_MIN_REC_SIZE) &
526 ~(LLOG_CHUNK_SIZE - 1);
530 * - cur_offset to the furthest point read in the log file
531 * - cur_idx to the log index preceeding cur_offset
532 * returns -EIO/-EINVAL on error
534 static int llog_osd_next_block(const struct lu_env *env,
535 struct llog_handle *loghandle, int *cur_idx,
536 int next_idx, __u64 *cur_offset, void *buf,
539 struct llog_thread_info *lgi = llog_info(env);
541 struct dt_device *dt;
549 if (len == 0 || len & (LLOG_CHUNK_SIZE - 1))
552 CDEBUG(D_OTHER, "looking for log index %u (cur idx %u off "LPU64")\n",
553 next_idx, *cur_idx, *cur_offset);
556 LASSERT(loghandle->lgh_ctxt);
558 o = loghandle->lgh_obj;
560 LASSERT(dt_object_exists(o));
561 dt = lu2dt_dev(o->do_lu.lo_dev);
564 rc = dt_attr_get(env, o, &lgi->lgi_attr, BYPASS_CAPA);
568 while (*cur_offset < lgi->lgi_attr.la_size) {
569 struct llog_rec_hdr *rec, *last_rec;
570 struct llog_rec_tail *tail;
572 llog_skip_over(cur_offset, *cur_idx, next_idx);
574 /* read up to next LLOG_CHUNK_SIZE block */
575 lgi->lgi_buf.lb_len = LLOG_CHUNK_SIZE -
576 (*cur_offset & (LLOG_CHUNK_SIZE - 1));
577 lgi->lgi_buf.lb_buf = buf;
579 /* Note: read lock is not needed around la_size get above at
580 * the time of dt_attr_get(). There are only two cases that
581 * matter. Either la_size == cur_offset, in which case the
582 * entire read is skipped, or la_size > cur_offset and the loop
583 * is entered and this thread is blocked at dt_read_lock()
584 * until the write is completed. When the write completes, then
585 * the dt_read() will be done with the full length, and will
588 dt_read_lock(env, o, 0);
589 rc = dt_read(env, o, &lgi->lgi_buf, cur_offset);
590 dt_read_unlock(env, o);
592 CERROR("%s: can't read llog block from log "DFID
593 " offset "LPU64": rc = %d\n",
594 o->do_lu.lo_dev->ld_obd->obd_name,
595 PFID(lu_object_fid(&o->do_lu)), *cur_offset,
601 /* signal the end of the valid buffer to
603 memset(buf + rc, 0, len - rc);
606 if (rc == 0) /* end of file, nothing to do */
609 if (rc < sizeof(*tail)) {
610 CERROR("%s: invalid llog block at log id "DOSTID"/%u "
612 o->do_lu.lo_dev->ld_obd->obd_name,
613 POSTID(&loghandle->lgh_id.lgl_oi),
614 loghandle->lgh_id.lgl_ogen, *cur_offset);
615 GOTO(out, rc = -EINVAL);
619 if (LLOG_REC_HDR_NEEDS_SWABBING(rec))
620 lustre_swab_llog_rec(rec);
622 tail = (struct llog_rec_tail *)((char *)buf + rc -
623 sizeof(struct llog_rec_tail));
624 /* get the last record in block */
625 last_rec = (struct llog_rec_hdr *)((char *)buf + rc -
626 le32_to_cpu(tail->lrt_len));
628 if (LLOG_REC_HDR_NEEDS_SWABBING(last_rec))
629 lustre_swab_llog_rec(last_rec);
630 LASSERT(last_rec->lrh_index == tail->lrt_index);
632 *cur_idx = tail->lrt_index;
634 /* this shouldn't happen */
635 if (tail->lrt_index == 0) {
636 CERROR("%s: invalid llog tail at log id "DOSTID"/%u "
638 o->do_lu.lo_dev->ld_obd->obd_name,
639 POSTID(&loghandle->lgh_id.lgl_oi),
640 loghandle->lgh_id.lgl_ogen, *cur_offset);
641 GOTO(out, rc = -EINVAL);
643 if (tail->lrt_index < next_idx)
646 /* sanity check that the start of the new buffer is no farther
647 * than the record that we wanted. This shouldn't happen. */
648 if (rec->lrh_index > next_idx) {
649 CERROR("%s: missed desired record? %u > %u\n",
650 o->do_lu.lo_dev->ld_obd->obd_name,
651 rec->lrh_index, next_idx);
652 GOTO(out, rc = -ENOENT);
656 GOTO(out, rc = -EIO);
661 static int llog_osd_prev_block(const struct lu_env *env,
662 struct llog_handle *loghandle,
663 int prev_idx, void *buf, int len)
665 struct llog_thread_info *lgi = llog_info(env);
667 struct dt_device *dt;
673 if (len == 0 || len & (LLOG_CHUNK_SIZE - 1))
676 CDEBUG(D_OTHER, "looking for log index %u\n", prev_idx);
679 LASSERT(loghandle->lgh_ctxt);
681 o = loghandle->lgh_obj;
683 LASSERT(dt_object_exists(o));
684 dt = lu2dt_dev(o->do_lu.lo_dev);
687 cur_offset = LLOG_CHUNK_SIZE;
688 llog_skip_over(&cur_offset, 0, prev_idx);
690 rc = dt_attr_get(env, o, &lgi->lgi_attr, BYPASS_CAPA);
694 while (cur_offset < lgi->lgi_attr.la_size) {
695 struct llog_rec_hdr *rec, *last_rec;
696 struct llog_rec_tail *tail;
698 lgi->lgi_buf.lb_len = len;
699 lgi->lgi_buf.lb_buf = buf;
700 /* It is OK to have locking around dt_read() only, see
701 * comment in llog_osd_next_block for details
703 dt_read_lock(env, o, 0);
704 rc = dt_read(env, o, &lgi->lgi_buf, &cur_offset);
705 dt_read_unlock(env, o);
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, rc);
714 if (rc == 0) /* end of file, nothing to do */
717 if (rc < sizeof(*tail)) {
718 CERROR("%s: invalid llog block at log id "DOSTID"/%u "
720 o->do_lu.lo_dev->ld_obd->obd_name,
721 POSTID(&loghandle->lgh_id.lgl_oi),
722 loghandle->lgh_id.lgl_ogen, cur_offset);
723 GOTO(out, rc = -EINVAL);
727 if (LLOG_REC_HDR_NEEDS_SWABBING(rec))
728 lustre_swab_llog_rec(rec);
730 tail = (struct llog_rec_tail *)((char *)buf + rc -
731 sizeof(struct llog_rec_tail));
732 /* get the last record in block */
733 last_rec = (struct llog_rec_hdr *)((char *)buf + rc -
734 le32_to_cpu(tail->lrt_len));
736 if (LLOG_REC_HDR_NEEDS_SWABBING(last_rec))
737 lustre_swab_llog_rec(last_rec);
738 LASSERT(last_rec->lrh_index == tail->lrt_index);
740 /* this shouldn't happen */
741 if (tail->lrt_index == 0) {
742 CERROR("%s: invalid llog tail at log id "DOSTID"/%u "
744 o->do_lu.lo_dev->ld_obd->obd_name,
745 POSTID(&loghandle->lgh_id.lgl_oi),
746 loghandle->lgh_id.lgl_ogen, cur_offset);
747 GOTO(out, rc = -EINVAL);
749 if (tail->lrt_index < prev_idx)
752 /* sanity check that the start of the new buffer is no farther
753 * than the record that we wanted. This shouldn't happen. */
754 if (rec->lrh_index > prev_idx) {
755 CERROR("%s: missed desired record? %u > %u\n",
756 o->do_lu.lo_dev->ld_obd->obd_name,
757 rec->lrh_index, prev_idx);
758 GOTO(out, rc = -ENOENT);
762 GOTO(out, rc = -EIO);
767 struct dt_object *llog_osd_dir_get(const struct lu_env *env,
768 struct llog_ctxt *ctxt)
770 struct dt_device *dt;
771 struct dt_thread_info *dti = dt_info(env);
772 struct dt_object *dir;
775 dt = ctxt->loc_exp->exp_obd->obd_lvfs_ctxt.dt;
776 if (ctxt->loc_dir == NULL) {
777 rc = dt_root_get(env, dt, &dti->dti_fid);
780 dir = dt_locate(env, dt, &dti->dti_fid);
782 if (!IS_ERR(dir) && !dt_try_as_dir(env, dir)) {
783 lu_object_put(env, &dir->do_lu);
784 return ERR_PTR(-ENOTDIR);
787 lu_object_get(&ctxt->loc_dir->do_lu);
794 static int llog_osd_open(const struct lu_env *env, struct llog_handle *handle,
795 struct llog_logid *logid, char *name,
796 enum llog_open_param open_param)
798 struct llog_thread_info *lgi = llog_info(env);
799 struct llog_ctxt *ctxt = handle->lgh_ctxt;
801 struct dt_device *dt;
802 struct ls_device *ls;
803 struct local_oid_storage *los;
810 LASSERT(ctxt->loc_exp);
811 LASSERT(ctxt->loc_exp->exp_obd);
812 dt = ctxt->loc_exp->exp_obd->obd_lvfs_ctxt.dt;
815 ls = ls_device_get(dt);
819 mutex_lock(&ls->ls_los_mutex);
820 los = dt_los_find(ls, name != NULL ? FID_SEQ_LLOG_NAME : FID_SEQ_LLOG);
821 mutex_unlock(&ls->ls_los_mutex);
823 ls_device_put(env, ls);
828 logid_to_fid(logid, &lgi->lgi_fid);
830 struct dt_object *llog_dir;
832 llog_dir = llog_osd_dir_get(env, ctxt);
833 if (IS_ERR(llog_dir))
834 GOTO(out, rc = PTR_ERR(llog_dir));
835 dt_read_lock(env, llog_dir, 0);
836 rc = dt_lookup_dir(env, llog_dir, name, &lgi->lgi_fid);
837 dt_read_unlock(env, llog_dir);
838 lu_object_put(env, &llog_dir->do_lu);
839 if (rc == -ENOENT && open_param == LLOG_OPEN_NEW) {
840 /* generate fid for new llog */
841 rc = local_object_fid_generate(env, los,
846 OBD_ALLOC(handle->lgh_name, strlen(name) + 1);
847 if (handle->lgh_name)
848 strcpy(handle->lgh_name, name);
850 GOTO(out, rc = -ENOMEM);
852 LASSERTF(open_param & LLOG_OPEN_NEW, "%#x\n", open_param);
853 /* generate fid for new llog */
854 rc = local_object_fid_generate(env, los, &lgi->lgi_fid);
859 o = ls_locate(env, ls, &lgi->lgi_fid, NULL);
861 GOTO(out_name, rc = PTR_ERR(o));
863 /* No new llog is expected but doesn't exist */
864 if (open_param != LLOG_OPEN_NEW && !dt_object_exists(o))
865 GOTO(out_put, rc = -ENOENT);
867 fid_to_logid(&lgi->lgi_fid, &handle->lgh_id);
869 handle->private_data = los;
870 LASSERT(handle->lgh_ctxt);
875 lu_object_put(env, &o->do_lu);
877 if (handle->lgh_name != NULL)
878 OBD_FREE(handle->lgh_name, strlen(name) + 1);
884 static int llog_osd_exist(struct llog_handle *handle)
886 LASSERT(handle->lgh_obj);
887 return (dt_object_exists(handle->lgh_obj) &&
888 !lu_object_is_dying(handle->lgh_obj->do_lu.lo_header));
891 static int llog_osd_declare_create(const struct lu_env *env,
892 struct llog_handle *res, struct thandle *th)
894 struct llog_thread_info *lgi = llog_info(env);
895 struct local_oid_storage *los;
901 LASSERT(res->lgh_obj);
904 /* object can be created by another thread */
906 if (dt_object_exists(o))
909 los = res->private_data;
912 rc = llog_osd_declare_new_object(env, los, o, th);
916 lgi->lgi_buf.lb_len = LLOG_CHUNK_SIZE;
917 lgi->lgi_buf.lb_buf = NULL;
918 rc = dt_declare_record_write(env, o, &lgi->lgi_buf, 0, th);
923 struct dt_object *llog_dir;
925 llog_dir = llog_osd_dir_get(env, res->lgh_ctxt);
926 if (IS_ERR(llog_dir))
927 RETURN(PTR_ERR(llog_dir));
928 logid_to_fid(&res->lgh_id, &lgi->lgi_fid);
929 rc = dt_declare_insert(env, llog_dir,
930 (struct dt_rec *)&lgi->lgi_fid,
931 (struct dt_key *)res->lgh_name, th);
932 lu_object_put(env, &llog_dir->do_lu);
934 CERROR("%s: can't declare named llog %s: rc = %d\n",
935 o->do_lu.lo_dev->ld_obd->obd_name,
941 /* This is a callback from the llog_* functions.
942 * Assumes caller has already pushed us into the kernel context. */
943 static int llog_osd_create(const struct lu_env *env, struct llog_handle *res,
946 struct llog_thread_info *lgi = llog_info(env);
947 struct local_oid_storage *los;
957 /* llog can be already created */
958 if (dt_object_exists(o))
961 los = res->private_data;
964 dt_write_lock(env, o, 0);
965 if (!dt_object_exists(o))
966 rc = llog_osd_create_new_object(env, los, o, th);
970 dt_write_unlock(env, o);
975 struct dt_object *llog_dir;
977 llog_dir = llog_osd_dir_get(env, res->lgh_ctxt);
978 if (IS_ERR(llog_dir))
979 RETURN(PTR_ERR(llog_dir));
981 logid_to_fid(&res->lgh_id, &lgi->lgi_fid);
982 dt_read_lock(env, llog_dir, 0);
983 rc = dt_insert(env, llog_dir,
984 (struct dt_rec *)&lgi->lgi_fid,
985 (struct dt_key *)res->lgh_name,
987 dt_read_unlock(env, llog_dir);
988 lu_object_put(env, &llog_dir->do_lu);
990 CERROR("%s: can't create named llog %s: rc = %d\n",
991 o->do_lu.lo_dev->ld_obd->obd_name,
997 static int llog_osd_close(const struct lu_env *env, struct llog_handle *handle)
999 struct local_oid_storage *los;
1004 LASSERT(handle->lgh_obj);
1006 lu_object_put(env, &handle->lgh_obj->do_lu);
1008 los = handle->private_data;
1012 if (handle->lgh_name)
1013 OBD_FREE(handle->lgh_name, strlen(handle->lgh_name) + 1);
1018 static int llog_osd_destroy(const struct lu_env *env,
1019 struct llog_handle *loghandle)
1021 struct llog_ctxt *ctxt;
1022 struct dt_object *o, *llog_dir = NULL;
1023 struct dt_device *d;
1030 ctxt = loghandle->lgh_ctxt;
1033 o = loghandle->lgh_obj;
1036 d = lu2dt_dev(o->do_lu.lo_dev);
1038 LASSERT(d == ctxt->loc_exp->exp_obd->obd_lvfs_ctxt.dt);
1040 th = dt_trans_create(env, d);
1042 RETURN(PTR_ERR(th));
1044 if (loghandle->lgh_name) {
1045 llog_dir = llog_osd_dir_get(env, ctxt);
1046 if (IS_ERR(llog_dir))
1047 GOTO(out_trans, rc = PTR_ERR(llog_dir));
1049 name = loghandle->lgh_name;
1050 rc = dt_declare_delete(env, llog_dir,
1051 (struct dt_key *)name, th);
1053 GOTO(out_trans, rc);
1056 dt_declare_ref_del(env, o, th);
1058 rc = dt_declare_destroy(env, o, th);
1060 GOTO(out_trans, rc);
1062 rc = dt_trans_start_local(env, d, th);
1064 GOTO(out_trans, rc);
1066 dt_write_lock(env, o, 0);
1067 if (dt_object_exists(o)) {
1069 dt_read_lock(env, llog_dir, 0);
1070 rc = dt_delete(env, llog_dir,
1071 (struct dt_key *) name,
1073 dt_read_unlock(env, llog_dir);
1075 CERROR("%s: can't remove llog %s: rc = %d\n",
1076 o->do_lu.lo_dev->ld_obd->obd_name,
1078 GOTO(out_unlock, rc);
1081 dt_ref_del(env, o, th);
1082 rc = dt_destroy(env, o, th);
1084 GOTO(out_unlock, rc);
1087 dt_write_unlock(env, o);
1089 dt_trans_stop(env, d, th);
1090 if (llog_dir != NULL)
1091 lu_object_put(env, &llog_dir->do_lu);
1095 static int llog_osd_setup(const struct lu_env *env, struct obd_device *obd,
1096 struct obd_llog_group *olg, int ctxt_idx,
1097 struct obd_device *disk_obd)
1099 struct local_oid_storage *los;
1100 struct llog_thread_info *lgi = llog_info(env);
1101 struct llog_ctxt *ctxt;
1107 LASSERT(olg->olg_ctxts[ctxt_idx]);
1109 ctxt = llog_ctxt_get(olg->olg_ctxts[ctxt_idx]);
1112 /* initialize data allowing to generate new fids,
1113 * literally we need a sequece */
1114 lgi->lgi_fid.f_seq = FID_SEQ_LLOG;
1115 lgi->lgi_fid.f_oid = 1;
1116 lgi->lgi_fid.f_ver = 0;
1117 rc = local_oid_storage_init(env, disk_obd->obd_lvfs_ctxt.dt,
1118 &lgi->lgi_fid, &los);
1122 lgi->lgi_fid.f_seq = FID_SEQ_LLOG_NAME;
1123 lgi->lgi_fid.f_oid = 1;
1124 lgi->lgi_fid.f_ver = 0;
1125 rc = local_oid_storage_init(env, disk_obd->obd_lvfs_ctxt.dt,
1126 &lgi->lgi_fid, &los);
1127 llog_ctxt_put(ctxt);
1131 static int llog_osd_cleanup(const struct lu_env *env, struct llog_ctxt *ctxt)
1133 struct dt_device *dt;
1134 struct ls_device *ls;
1135 struct local_oid_storage *los, *nlos;
1137 LASSERT(ctxt->loc_exp->exp_obd);
1138 dt = ctxt->loc_exp->exp_obd->obd_lvfs_ctxt.dt;
1139 ls = ls_device_get(dt);
1141 RETURN(PTR_ERR(ls));
1143 mutex_lock(&ls->ls_los_mutex);
1144 los = dt_los_find(ls, FID_SEQ_LLOG);
1145 nlos = dt_los_find(ls, FID_SEQ_LLOG_NAME);
1146 mutex_unlock(&ls->ls_los_mutex);
1149 local_oid_storage_fini(env, los);
1153 local_oid_storage_fini(env, nlos);
1155 ls_device_put(env, ls);
1159 struct llog_operations llog_osd_ops = {
1160 .lop_next_block = llog_osd_next_block,
1161 .lop_prev_block = llog_osd_prev_block,
1162 .lop_read_header = llog_osd_read_header,
1163 .lop_destroy = llog_osd_destroy,
1164 .lop_setup = llog_osd_setup,
1165 .lop_cleanup = llog_osd_cleanup,
1166 .lop_open = llog_osd_open,
1167 .lop_exist = llog_osd_exist,
1168 .lop_declare_create = llog_osd_declare_create,
1169 .lop_create = llog_osd_create,
1170 .lop_declare_write_rec = llog_osd_declare_write_rec,
1171 .lop_write_rec = llog_osd_write_rec,
1172 .lop_close = llog_osd_close,
1174 EXPORT_SYMBOL(llog_osd_ops);
1176 /* reads the catalog list */
1177 int llog_osd_get_cat_list(const struct lu_env *env, struct dt_device *d,
1178 int idx, int count, struct llog_catid *idarray,
1179 const struct lu_fid *fid)
1181 struct llog_thread_info *lgi = llog_info(env);
1182 struct dt_object *o = NULL;
1190 size = sizeof(*idarray) * count;
1191 lgi->lgi_off = idx * sizeof(*idarray);
1193 lgi->lgi_fid = *fid;
1194 o = dt_locate(env, d, &lgi->lgi_fid);
1198 if (!dt_object_exists(o)) {
1199 th = dt_trans_create(env, d);
1201 GOTO(out, rc = PTR_ERR(th));
1203 lgi->lgi_attr.la_valid = LA_MODE;
1204 lgi->lgi_attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
1205 lgi->lgi_dof.dof_type = dt_mode_to_dft(S_IFREG);
1207 rc = dt_declare_create(env, o, &lgi->lgi_attr, NULL,
1210 GOTO(out_trans, rc);
1212 rc = dt_trans_start_local(env, d, th);
1214 GOTO(out_trans, rc);
1216 dt_write_lock(env, o, 0);
1217 if (!dt_object_exists(o))
1218 rc = dt_create(env, o, &lgi->lgi_attr, NULL,
1220 dt_write_unlock(env, o);
1222 dt_trans_stop(env, d, th);
1227 rc = dt_attr_get(env, o, &lgi->lgi_attr, BYPASS_CAPA);
1231 if (!S_ISREG(lgi->lgi_attr.la_mode)) {
1232 CERROR("%s: CATALOGS is not a regular file!: mode = %o\n",
1233 o->do_lu.lo_dev->ld_obd->obd_name,
1234 lgi->lgi_attr.la_mode);
1235 GOTO(out, rc = -ENOENT);
1238 CDEBUG(D_CONFIG, "cat list: disk size=%d, read=%d\n",
1239 (int)lgi->lgi_attr.la_size, size);
1241 /* return just number of llogs */
1242 if (idarray == NULL) {
1243 rc = lgi->lgi_attr.la_size / sizeof(*idarray);
1247 /* read for new ost index or for empty file */
1248 memset(idarray, 0, size);
1249 if (lgi->lgi_attr.la_size < lgi->lgi_off + size)
1251 if (lgi->lgi_attr.la_size < lgi->lgi_off + size)
1252 size = lgi->lgi_attr.la_size - lgi->lgi_off;
1254 lgi->lgi_buf.lb_buf = idarray;
1255 lgi->lgi_buf.lb_len = size;
1256 rc = dt_record_read(env, o, &lgi->lgi_buf, &lgi->lgi_off);
1258 CERROR("%s: error reading CATALOGS: rc = %d\n",
1259 o->do_lu.lo_dev->ld_obd->obd_name, rc);
1265 lu_object_put(env, &o->do_lu);
1268 EXPORT_SYMBOL(llog_osd_get_cat_list);
1270 /* writes the cat list */
1271 int llog_osd_put_cat_list(const struct lu_env *env, struct dt_device *d,
1272 int idx, int count, struct llog_catid *idarray,
1273 const struct lu_fid *fid)
1275 struct llog_thread_info *lgi = llog_info(env);
1276 struct dt_object *o = NULL;
1285 size = sizeof(*idarray) * count;
1286 lgi->lgi_off = idx * sizeof(*idarray);
1287 lgi->lgi_fid = *fid;
1289 o = dt_locate(env, d, &lgi->lgi_fid);
1293 if (!dt_object_exists(o))
1294 GOTO(out, rc = -ENOENT);
1296 rc = dt_attr_get(env, o, &lgi->lgi_attr, BYPASS_CAPA);
1300 if (!S_ISREG(lgi->lgi_attr.la_mode)) {
1301 CERROR("%s: CATALOGS is not a regular file!: mode = %o\n",
1302 o->do_lu.lo_dev->ld_obd->obd_name,
1303 lgi->lgi_attr.la_mode);
1304 GOTO(out, rc = -ENOENT);
1307 th = dt_trans_create(env, d);
1309 GOTO(out, rc = PTR_ERR(th));
1311 lgi->lgi_buf.lb_len = size;
1312 lgi->lgi_buf.lb_buf = idarray;
1313 rc = dt_declare_record_write(env, o, &lgi->lgi_buf, lgi->lgi_off, th);
1317 rc = dt_trans_start_local(env, d, th);
1319 GOTO(out_trans, rc);
1321 rc = dt_record_write(env, o, &lgi->lgi_buf, &lgi->lgi_off, th);
1323 CDEBUG(D_INODE, "error writeing CATALOGS: rc = %d\n", rc);
1325 dt_trans_stop(env, d, th);
1327 lu_object_put(env, &o->do_lu);
1330 EXPORT_SYMBOL(llog_osd_put_cat_list);