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) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
31 * Lustre Unified Target
32 * These are common function to work with last_received file
34 * Author: Mikhail Pershin <mike.pershin@intel.com>
37 #include <obd_class.h>
38 #include <lustre_fid.h>
40 #include "tgt_internal.h"
42 /** version recovery epoch */
43 #define LR_EPOCH_BITS 32
45 /* Allocate a bitmap for a chunk of reply data slots */
46 static int tgt_bitmap_chunk_alloc(struct lu_target *lut, int chunk)
50 OBD_ALLOC_LARGE(bm, BITS_TO_LONGS(LUT_REPLY_SLOTS_PER_CHUNK) *
55 spin_lock(&lut->lut_client_bitmap_lock);
57 if (lut->lut_reply_bitmap[chunk] != NULL) {
58 /* someone else already allocated the bitmap for this chunk */
59 spin_unlock(&lut->lut_client_bitmap_lock);
60 OBD_FREE_LARGE(bm, BITS_TO_LONGS(LUT_REPLY_SLOTS_PER_CHUNK) *
65 lut->lut_reply_bitmap[chunk] = bm;
67 spin_unlock(&lut->lut_client_bitmap_lock);
72 /* Look for an available reply data slot in the bitmap
74 * Allocate bitmap chunk when first used
75 * XXX algo could be improved if this routine limits performance
77 static int tgt_find_free_reply_slot(struct lu_target *lut)
84 for (chunk = 0; chunk < LUT_REPLY_SLOTS_MAX_CHUNKS; chunk++) {
85 /* allocate the bitmap chunk if necessary */
86 if (unlikely(lut->lut_reply_bitmap[chunk] == NULL)) {
87 rc = tgt_bitmap_chunk_alloc(lut, chunk);
91 bmp = lut->lut_reply_bitmap[chunk];
93 /* look for an available slot in this chunk */
95 b = find_first_zero_bit(bmp, LUT_REPLY_SLOTS_PER_CHUNK);
96 if (b >= LUT_REPLY_SLOTS_PER_CHUNK)
100 if (test_and_set_bit(b, bmp) == 0)
101 return chunk * LUT_REPLY_SLOTS_PER_CHUNK + b;
108 /* Mark the reply data slot @idx 'used' in the corresponding bitmap chunk
110 * Allocate the bitmap chunk if necessary
112 static int tgt_set_reply_slot(struct lu_target *lut, int idx)
118 chunk = idx / LUT_REPLY_SLOTS_PER_CHUNK;
119 b = idx % LUT_REPLY_SLOTS_PER_CHUNK;
121 LASSERT(chunk < LUT_REPLY_SLOTS_MAX_CHUNKS);
122 LASSERT(b < LUT_REPLY_SLOTS_PER_CHUNK);
124 /* allocate the bitmap chunk if necessary */
125 if (unlikely(lut->lut_reply_bitmap[chunk] == NULL)) {
126 rc = tgt_bitmap_chunk_alloc(lut, chunk);
131 /* mark the slot 'used' in this chunk */
132 if (test_and_set_bit(b, lut->lut_reply_bitmap[chunk]) != 0) {
133 CERROR("%s: slot %d already set in bitmap\n",
142 /* Mark the reply data slot @idx 'unused' in the corresponding bitmap chunk
145 static int tgt_clear_reply_slot(struct lu_target *lut, int idx)
150 if (lut->lut_obd->obd_stopping)
152 * in case of failover keep the bit set in order to
153 * avoid overwriting slots in reply_data which might
154 * be required by resent rpcs
157 chunk = idx / LUT_REPLY_SLOTS_PER_CHUNK;
158 b = idx % LUT_REPLY_SLOTS_PER_CHUNK;
160 LASSERT(chunk < LUT_REPLY_SLOTS_MAX_CHUNKS);
161 LASSERT(b < LUT_REPLY_SLOTS_PER_CHUNK);
163 if (lut->lut_reply_bitmap[chunk] == NULL) {
164 CERROR("%s: slot %d not allocated\n",
169 if (test_and_clear_bit(b, lut->lut_reply_bitmap[chunk]) == 0) {
170 CERROR("%s: slot %d already clear in bitmap\n",
179 /* Read header of reply_data file of target @tgt into structure @lrh */
180 static int tgt_reply_header_read(const struct lu_env *env,
181 struct lu_target *tgt,
182 struct lsd_reply_header *lrh)
185 struct lsd_reply_header buf;
186 struct tgt_thread_info *tti = tgt_th_info(env);
189 tti->tti_buf.lb_buf = &buf;
190 tti->tti_buf.lb_len = sizeof(buf);
192 rc = dt_record_read(env, tgt->lut_reply_data, &tti->tti_buf,
197 lrh->lrh_magic = le32_to_cpu(buf.lrh_magic);
198 lrh->lrh_header_size = le32_to_cpu(buf.lrh_header_size);
199 lrh->lrh_reply_size = le32_to_cpu(buf.lrh_reply_size);
201 CDEBUG(D_HA, "%s: read %s header. magic=0x%08x "
202 "header_size=%d reply_size=%d\n",
203 tgt->lut_obd->obd_name, REPLY_DATA,
204 lrh->lrh_magic, lrh->lrh_header_size, lrh->lrh_reply_size);
209 /* Write header into replay_data file of target @tgt from structure @lrh */
210 static int tgt_reply_header_write(const struct lu_env *env,
211 struct lu_target *tgt,
212 struct lsd_reply_header *lrh)
215 struct lsd_reply_header buf;
216 struct tgt_thread_info *tti = tgt_th_info(env);
218 struct dt_object *dto;
220 CDEBUG(D_HA, "%s: write %s header. magic=0x%08x "
221 "header_size=%d reply_size=%d\n",
222 tgt->lut_obd->obd_name, REPLY_DATA,
223 lrh->lrh_magic, lrh->lrh_header_size, lrh->lrh_reply_size);
225 if (tgt->lut_bottom->dd_rdonly)
228 buf.lrh_magic = cpu_to_le32(lrh->lrh_magic);
229 buf.lrh_header_size = cpu_to_le32(lrh->lrh_header_size);
230 buf.lrh_reply_size = cpu_to_le32(lrh->lrh_reply_size);
232 th = dt_trans_create(env, tgt->lut_bottom);
238 tti->tti_buf.lb_buf = &buf;
239 tti->tti_buf.lb_len = sizeof(buf);
241 rc = dt_declare_record_write(env, tgt->lut_reply_data,
242 &tti->tti_buf, tti->tti_off, th);
246 rc = dt_trans_start(env, tgt->lut_bottom, th);
250 dto = dt_object_locate(tgt->lut_reply_data, th->th_dev);
251 rc = dt_record_write(env, dto, &tti->tti_buf, &tti->tti_off, th);
253 dt_trans_stop(env, tgt->lut_bottom, th);
257 /* Write the reply data @lrd into reply_data file of target @tgt
260 static int tgt_reply_data_write(const struct lu_env *env, struct lu_target *tgt,
261 struct lsd_reply_data *lrd, loff_t off,
264 struct tgt_thread_info *tti = tgt_th_info(env);
265 struct dt_object *dto;
266 struct lsd_reply_data *buf = &tti->tti_lrd;
268 lrd->lrd_result = ptlrpc_status_hton(lrd->lrd_result);
270 buf->lrd_transno = cpu_to_le64(lrd->lrd_transno);
271 buf->lrd_xid = cpu_to_le64(lrd->lrd_xid);
272 buf->lrd_data = cpu_to_le64(lrd->lrd_data);
273 buf->lrd_result = cpu_to_le32(lrd->lrd_result);
274 buf->lrd_client_gen = cpu_to_le32(lrd->lrd_client_gen);
276 lrd->lrd_result = ptlrpc_status_ntoh(lrd->lrd_result);
279 tti->tti_buf.lb_buf = buf;
280 tti->tti_buf.lb_len = sizeof(*buf);
282 dto = dt_object_locate(tgt->lut_reply_data, th->th_dev);
283 return dt_record_write(env, dto, &tti->tti_buf, &tti->tti_off, th);
286 /* Read the reply data from reply_data file of target @tgt at offset @off
287 * into structure @lrd
289 static int tgt_reply_data_read(const struct lu_env *env, struct lu_target *tgt,
290 struct lsd_reply_data *lrd, loff_t off)
293 struct tgt_thread_info *tti = tgt_th_info(env);
294 struct lsd_reply_data *buf = &tti->tti_lrd;
297 tti->tti_buf.lb_buf = buf;
298 tti->tti_buf.lb_len = sizeof(*buf);
300 rc = dt_record_read(env, tgt->lut_reply_data, &tti->tti_buf,
305 lrd->lrd_transno = le64_to_cpu(buf->lrd_transno);
306 lrd->lrd_xid = le64_to_cpu(buf->lrd_xid);
307 lrd->lrd_data = le64_to_cpu(buf->lrd_data);
308 lrd->lrd_result = le32_to_cpu(buf->lrd_result);
309 lrd->lrd_client_gen = le32_to_cpu(buf->lrd_client_gen);
315 /* Free the in-memory reply data structure @trd and release
316 * the corresponding slot in the reply_data file of target @lut
317 * Called with ted_lcd_lock held
319 static void tgt_free_reply_data(struct lu_target *lut,
320 struct tg_export_data *ted,
321 struct tg_reply_data *trd)
323 CDEBUG(D_TRACE, "%s: free reply data %p: xid %llu, transno %llu, "
324 "client gen %u, slot idx %d\n",
325 lut == NULL ? "" : tgt_name(lut), trd, trd->trd_reply.lrd_xid,
326 trd->trd_reply.lrd_transno, trd->trd_reply.lrd_client_gen,
329 LASSERT(mutex_is_locked(&ted->ted_lcd_lock));
331 list_del(&trd->trd_list);
332 ted->ted_reply_cnt--;
333 if (lut != NULL && trd->trd_index != TRD_INDEX_MEMORY)
334 tgt_clear_reply_slot(lut, trd->trd_index);
338 /* Release the reply data @trd from target @lut
339 * The reply data with the highest transno for this export
340 * is retained to ensure correctness of target recovery
341 * Called with ted_lcd_lock held
343 static void tgt_release_reply_data(struct lu_target *lut,
344 struct tg_export_data *ted,
345 struct tg_reply_data *trd)
347 CDEBUG(D_TRACE, "%s: release reply data %p: xid %llu, transno %llu, "
348 "client gen %u, slot idx %d\n",
349 lut == NULL ? "" : tgt_name(lut), trd, trd->trd_reply.lrd_xid,
350 trd->trd_reply.lrd_transno, trd->trd_reply.lrd_client_gen,
353 LASSERT(mutex_is_locked(&ted->ted_lcd_lock));
355 /* Do not free the reply data corresponding to the
356 * highest transno of this export.
357 * This ensures on-disk reply data is kept and
358 * last committed transno can be restored from disk in case
361 if (trd->trd_reply.lrd_transno == ted->ted_lcd->lcd_last_transno) {
362 /* free previous retained reply */
363 if (ted->ted_reply_last != NULL)
364 tgt_free_reply_data(lut, ted, ted->ted_reply_last);
365 /* retain the reply */
366 list_del_init(&trd->trd_list);
367 ted->ted_reply_last = trd;
369 tgt_free_reply_data(lut, ted, trd);
373 static inline struct lu_buf *tti_buf_lsd(struct tgt_thread_info *tti)
375 tti->tti_buf.lb_buf = &tti->tti_lsd;
376 tti->tti_buf.lb_len = sizeof(tti->tti_lsd);
377 return &tti->tti_buf;
380 static inline struct lu_buf *tti_buf_lcd(struct tgt_thread_info *tti)
382 tti->tti_buf.lb_buf = &tti->tti_lcd;
383 tti->tti_buf.lb_len = sizeof(tti->tti_lcd);
384 return &tti->tti_buf;
388 * Allocate in-memory data for client slot related to export.
390 int tgt_client_alloc(struct obd_export *exp)
393 LASSERT(exp != exp->exp_obd->obd_self_export);
395 spin_lock_init(&exp->exp_target_data.ted_nodemap_lock);
396 INIT_LIST_HEAD(&exp->exp_target_data.ted_nodemap_member);
397 spin_lock_init(&exp->exp_target_data.ted_fmd_lock);
398 INIT_LIST_HEAD(&exp->exp_target_data.ted_fmd_list);
400 OBD_ALLOC_PTR(exp->exp_target_data.ted_lcd);
401 if (exp->exp_target_data.ted_lcd == NULL)
403 /* Mark that slot is not yet valid, 0 doesn't work here */
404 exp->exp_target_data.ted_lr_idx = -1;
405 INIT_LIST_HEAD(&exp->exp_target_data.ted_reply_list);
406 mutex_init(&exp->exp_target_data.ted_lcd_lock);
409 EXPORT_SYMBOL(tgt_client_alloc);
412 * Free in-memory data for client slot related to export.
414 void tgt_client_free(struct obd_export *exp)
416 struct tg_export_data *ted = &exp->exp_target_data;
417 struct lu_target *lut = class_exp2tgt(exp);
418 struct tg_reply_data *trd, *tmp;
420 LASSERT(exp != exp->exp_obd->obd_self_export);
422 tgt_fmd_cleanup(exp);
424 /* free reply data */
425 mutex_lock(&ted->ted_lcd_lock);
426 list_for_each_entry_safe(trd, tmp, &ted->ted_reply_list, trd_list) {
427 tgt_release_reply_data(lut, ted, trd);
429 if (ted->ted_reply_last != NULL) {
430 tgt_free_reply_data(lut, ted, ted->ted_reply_last);
431 ted->ted_reply_last = NULL;
433 mutex_unlock(&ted->ted_lcd_lock);
435 if (!hlist_unhashed(&exp->exp_gen_hash))
436 cfs_hash_del(exp->exp_obd->obd_gen_hash,
437 &ted->ted_lcd->lcd_generation,
440 OBD_FREE_PTR(ted->ted_lcd);
443 /* Target may have been freed (see LU-7430)
444 * Slot may be not yet assigned */
445 if (exp->exp_obd->u.obt.obt_magic != OBT_MAGIC ||
449 /* Clear bit when lcd is freed */
450 LASSERT(lut && lut->lut_client_bitmap);
451 if (!test_and_clear_bit(ted->ted_lr_idx, lut->lut_client_bitmap)) {
452 CERROR("%s: client %u bit already clear in bitmap\n",
453 exp->exp_obd->obd_name, ted->ted_lr_idx);
457 if (tgt_is_multimodrpcs_client(exp) && !exp->exp_obd->obd_stopping)
458 atomic_dec(&lut->lut_num_clients);
460 EXPORT_SYMBOL(tgt_client_free);
462 static inline void tgt_check_lcd(const char *obd_name, int index,
463 struct lsd_client_data *lcd)
465 size_t uuid_size = sizeof(lcd->lcd_uuid);
467 if (strnlen((char*)lcd->lcd_uuid, uuid_size) == uuid_size) {
468 lcd->lcd_uuid[uuid_size - 1] = '\0';
470 LCONSOLE_ERROR("the client UUID (%s) on %s for exports stored in last_rcvd(index = %d) is bad!\n",
471 lcd->lcd_uuid, obd_name, index);
475 static int tgt_client_data_read(const struct lu_env *env, struct lu_target *tgt,
476 struct lsd_client_data *lcd,
477 loff_t *off, int index)
479 struct tgt_thread_info *tti = tgt_th_info(env);
483 rc = dt_record_read(env, tgt->lut_last_rcvd, &tti->tti_buf, off);
485 tgt_check_lcd(tgt->lut_obd->obd_name, index, &tti->tti_lcd);
486 lcd_le_to_cpu(&tti->tti_lcd, lcd);
487 lcd->lcd_last_result = ptlrpc_status_ntoh(lcd->lcd_last_result);
488 lcd->lcd_last_close_result =
489 ptlrpc_status_ntoh(lcd->lcd_last_close_result);
492 CDEBUG(D_INFO, "%s: read lcd @%lld uuid = %s, last_transno = %llu"
493 ", last_xid = %llu, last_result = %u, last_data = %u, "
494 "last_close_transno = %llu, last_close_xid = %llu, "
495 "last_close_result = %u, rc = %d\n", tgt->lut_obd->obd_name,
496 *off, lcd->lcd_uuid, lcd->lcd_last_transno, lcd->lcd_last_xid,
497 lcd->lcd_last_result, lcd->lcd_last_data,
498 lcd->lcd_last_close_transno, lcd->lcd_last_close_xid,
499 lcd->lcd_last_close_result, rc);
503 static int tgt_client_data_write(const struct lu_env *env,
504 struct lu_target *tgt,
505 struct lsd_client_data *lcd,
506 loff_t *off, struct thandle *th)
508 struct tgt_thread_info *tti = tgt_th_info(env);
509 struct dt_object *dto;
511 lcd->lcd_last_result = ptlrpc_status_hton(lcd->lcd_last_result);
512 lcd->lcd_last_close_result =
513 ptlrpc_status_hton(lcd->lcd_last_close_result);
514 lcd_cpu_to_le(lcd, &tti->tti_lcd);
517 dto = dt_object_locate(tgt->lut_last_rcvd, th->th_dev);
518 return dt_record_write(env, dto, &tti->tti_buf, off, th);
521 struct tgt_new_client_callback {
522 struct dt_txn_commit_cb lncc_cb;
523 struct obd_export *lncc_exp;
526 static void tgt_cb_new_client(struct lu_env *env, struct thandle *th,
527 struct dt_txn_commit_cb *cb, int err)
529 struct tgt_new_client_callback *ccb;
531 ccb = container_of(cb, struct tgt_new_client_callback, lncc_cb);
533 LASSERT(ccb->lncc_exp->exp_obd);
535 CDEBUG(D_RPCTRACE, "%s: committing for initial connect of %s\n",
536 ccb->lncc_exp->exp_obd->obd_name,
537 ccb->lncc_exp->exp_client_uuid.uuid);
539 spin_lock(&ccb->lncc_exp->exp_lock);
541 ccb->lncc_exp->exp_need_sync = 0;
543 spin_unlock(&ccb->lncc_exp->exp_lock);
544 class_export_cb_put(ccb->lncc_exp);
549 int tgt_new_client_cb_add(struct thandle *th, struct obd_export *exp)
551 struct tgt_new_client_callback *ccb;
552 struct dt_txn_commit_cb *dcb;
559 ccb->lncc_exp = class_export_cb_get(exp);
562 dcb->dcb_func = tgt_cb_new_client;
563 INIT_LIST_HEAD(&dcb->dcb_linkage);
564 strlcpy(dcb->dcb_name, "tgt_cb_new_client", sizeof(dcb->dcb_name));
566 rc = dt_trans_cb_add(th, dcb);
568 class_export_cb_put(exp);
575 * Update client data in last_rcvd
577 static int tgt_client_data_update(const struct lu_env *env,
578 struct obd_export *exp)
580 struct tg_export_data *ted = &exp->exp_target_data;
581 struct lu_target *tgt = class_exp2tgt(exp);
582 struct tgt_thread_info *tti = tgt_th_info(env);
588 if (unlikely(tgt == NULL)) {
589 CDEBUG(D_ERROR, "%s: No target for connected export\n",
590 class_exp2obd(exp)->obd_name);
594 if (tgt->lut_bottom->dd_rdonly)
597 th = dt_trans_create(env, tgt->lut_bottom);
602 rc = dt_declare_record_write(env, tgt->lut_last_rcvd,
604 ted->ted_lr_off, th);
608 rc = dt_trans_start_local(env, tgt->lut_bottom, th);
612 mutex_lock(&ted->ted_lcd_lock);
615 * Until this operations will be committed the sync is needed
616 * for this export. This should be done _after_ starting the
617 * transaction so that many connecting clients will not bring
618 * server down with lots of sync writes.
620 rc = tgt_new_client_cb_add(th, exp);
622 /* can't add callback, do sync now */
625 spin_lock(&exp->exp_lock);
626 exp->exp_need_sync = 1;
627 spin_unlock(&exp->exp_lock);
630 tti->tti_off = ted->ted_lr_off;
631 rc = tgt_client_data_write(env, tgt, ted->ted_lcd, &tti->tti_off, th);
633 mutex_unlock(&ted->ted_lcd_lock);
637 dt_trans_stop(env, tgt->lut_bottom, th);
638 CDEBUG(D_INFO, "%s: update last_rcvd client data for UUID = %s, "
639 "last_transno = %llu: rc = %d\n", tgt->lut_obd->obd_name,
640 tgt->lut_lsd.lsd_uuid, tgt->lut_lsd.lsd_last_transno, rc);
645 static int tgt_server_data_read(const struct lu_env *env, struct lu_target *tgt)
647 struct tgt_thread_info *tti = tgt_th_info(env);
652 rc = dt_record_read(env, tgt->lut_last_rcvd, &tti->tti_buf,
655 lsd_le_to_cpu(&tti->tti_lsd, &tgt->lut_lsd);
657 CDEBUG(D_INFO, "%s: read last_rcvd server data for UUID = %s, "
658 "last_transno = %llu: rc = %d\n", tgt->lut_obd->obd_name,
659 tgt->lut_lsd.lsd_uuid, tgt->lut_lsd.lsd_last_transno, rc);
663 static int tgt_server_data_write(const struct lu_env *env,
664 struct lu_target *tgt, struct thandle *th)
666 struct tgt_thread_info *tti = tgt_th_info(env);
667 struct dt_object *dto;
674 lsd_cpu_to_le(&tgt->lut_lsd, &tti->tti_lsd);
676 dto = dt_object_locate(tgt->lut_last_rcvd, th->th_dev);
677 rc = dt_record_write(env, dto, &tti->tti_buf, &tti->tti_off, th);
679 CDEBUG(D_INFO, "%s: write last_rcvd server data for UUID = %s, "
680 "last_transno = %llu: rc = %d\n", tgt->lut_obd->obd_name,
681 tgt->lut_lsd.lsd_uuid, tgt->lut_lsd.lsd_last_transno, rc);
687 * Update server data in last_rcvd
689 int tgt_server_data_update(const struct lu_env *env, struct lu_target *tgt,
692 struct tgt_thread_info *tti = tgt_th_info(env);
699 "%s: mount_count is %llu, last_transno is %llu\n",
700 tgt->lut_lsd.lsd_uuid, tgt->lut_obd->u.obt.obt_mount_count,
701 tgt->lut_last_transno);
703 /* Always save latest transno to keep it fresh */
704 spin_lock(&tgt->lut_translock);
705 tgt->lut_lsd.lsd_last_transno = tgt->lut_last_transno;
706 spin_unlock(&tgt->lut_translock);
708 if (tgt->lut_bottom->dd_rdonly)
711 th = dt_trans_create(env, tgt->lut_bottom);
718 rc = dt_declare_record_write(env, tgt->lut_last_rcvd,
719 &tti->tti_buf, tti->tti_off, th);
723 rc = dt_trans_start(env, tgt->lut_bottom, th);
727 rc = tgt_server_data_write(env, tgt, th);
729 dt_trans_stop(env, tgt->lut_bottom, th);
731 CDEBUG(D_INFO, "%s: update last_rcvd server data for UUID = %s, "
732 "last_transno = %llu: rc = %d\n", tgt->lut_obd->obd_name,
733 tgt->lut_lsd.lsd_uuid, tgt->lut_lsd.lsd_last_transno, rc);
736 EXPORT_SYMBOL(tgt_server_data_update);
738 static int tgt_truncate_last_rcvd(const struct lu_env *env,
739 struct lu_target *tgt, loff_t size)
741 struct dt_object *dt = tgt->lut_last_rcvd;
748 if (tgt->lut_bottom->dd_rdonly)
752 attr.la_valid = LA_SIZE;
754 th = dt_trans_create(env, tgt->lut_bottom);
757 rc = dt_declare_punch(env, dt, size, OBD_OBJECT_EOF, th);
760 rc = dt_declare_attr_set(env, dt, &attr, th);
763 rc = dt_trans_start_local(env, tgt->lut_bottom, th);
767 rc = dt_punch(env, dt, size, OBD_OBJECT_EOF, th);
769 rc = dt_attr_set(env, dt, &attr, th);
772 dt_trans_stop(env, tgt->lut_bottom, th);
777 static void tgt_client_epoch_update(const struct lu_env *env,
778 struct obd_export *exp)
780 struct lsd_client_data *lcd = exp->exp_target_data.ted_lcd;
781 struct lu_target *tgt = class_exp2tgt(exp);
783 LASSERT(tgt && tgt->lut_bottom);
784 /** VBR: set client last_epoch to current epoch */
785 if (lcd->lcd_last_epoch >= tgt->lut_lsd.lsd_start_epoch)
787 lcd->lcd_last_epoch = tgt->lut_lsd.lsd_start_epoch;
788 tgt_client_data_update(env, exp);
792 * Update boot epoch when recovery ends
794 void tgt_boot_epoch_update(struct lu_target *tgt)
797 struct ptlrpc_request *req;
799 LIST_HEAD(client_list);
802 if (tgt->lut_obd->obd_stopping)
805 rc = lu_env_init(&env, LCT_DT_THREAD);
807 CERROR("%s: can't initialize environment: rc = %d\n",
808 tgt->lut_obd->obd_name, rc);
812 spin_lock(&tgt->lut_translock);
813 start_epoch = (tgt->lut_last_transno >> LR_EPOCH_BITS) + 1;
814 tgt->lut_last_transno = (__u64)start_epoch << LR_EPOCH_BITS;
815 tgt->lut_lsd.lsd_start_epoch = start_epoch;
816 spin_unlock(&tgt->lut_translock);
819 * The recovery is not yet finished and final queue can still be updated
820 * with resend requests. Move final list to separate one for processing
822 spin_lock(&tgt->lut_obd->obd_recovery_task_lock);
823 list_splice_init(&tgt->lut_obd->obd_final_req_queue, &client_list);
824 spin_unlock(&tgt->lut_obd->obd_recovery_task_lock);
827 * go through list of exports participated in recovery and
828 * set new epoch for them
830 list_for_each_entry(req, &client_list, rq_list) {
831 LASSERT(!req->rq_export->exp_delayed);
832 if (!req->rq_export->exp_vbr_failed)
833 tgt_client_epoch_update(&env, req->rq_export);
835 /** return list back at once */
836 spin_lock(&tgt->lut_obd->obd_recovery_task_lock);
837 list_splice_init(&client_list, &tgt->lut_obd->obd_final_req_queue);
838 spin_unlock(&tgt->lut_obd->obd_recovery_task_lock);
840 /** Clear MULTI RPCS incompatibility flag if
841 * - target is MDT and
842 * - there is no client to recover or the recovery was aborted
844 if (!strncmp(tgt->lut_obd->obd_type->typ_name, LUSTRE_MDT_NAME, 3) &&
845 (atomic_read(&tgt->lut_obd->obd_max_recoverable_clients) == 0 ||
846 tgt->lut_obd->obd_abort_recovery))
847 tgt->lut_lsd.lsd_feature_incompat &= ~OBD_INCOMPAT_MULTI_RPCS;
849 /** update server epoch */
850 tgt_server_data_update(&env, tgt, 1);
855 * commit callback, need to update last_committed value
857 struct tgt_last_committed_callback {
858 struct dt_txn_commit_cb llcc_cb;
859 struct lu_target *llcc_tgt;
860 struct obd_export *llcc_exp;
864 static void tgt_cb_last_committed(struct lu_env *env, struct thandle *th,
865 struct dt_txn_commit_cb *cb, int err)
867 struct tgt_last_committed_callback *ccb;
869 ccb = container_of(cb, struct tgt_last_committed_callback, llcc_cb);
871 LASSERT(ccb->llcc_exp);
872 LASSERT(ccb->llcc_tgt != NULL);
873 LASSERT(ccb->llcc_exp->exp_obd == ccb->llcc_tgt->lut_obd);
875 /* error hit, don't update last committed to provide chance to
876 * replay data after fail */
880 /* Fast path w/o spinlock, if exp_last_committed was updated
881 * with higher transno, no need to take spinlock and check,
882 * also no need to update obd_last_committed. */
883 if (ccb->llcc_transno <= ccb->llcc_exp->exp_last_committed)
885 spin_lock(&ccb->llcc_tgt->lut_translock);
886 if (ccb->llcc_transno > ccb->llcc_tgt->lut_obd->obd_last_committed)
887 ccb->llcc_tgt->lut_obd->obd_last_committed = ccb->llcc_transno;
889 if (ccb->llcc_transno > ccb->llcc_exp->exp_last_committed) {
890 ccb->llcc_exp->exp_last_committed = ccb->llcc_transno;
891 spin_unlock(&ccb->llcc_tgt->lut_translock);
893 ptlrpc_commit_replies(ccb->llcc_exp);
894 tgt_cancel_slc_locks(ccb->llcc_tgt, ccb->llcc_transno);
896 spin_unlock(&ccb->llcc_tgt->lut_translock);
899 CDEBUG(D_HA, "%s: transno %lld is committed\n",
900 ccb->llcc_tgt->lut_obd->obd_name, ccb->llcc_transno);
903 class_export_cb_put(ccb->llcc_exp);
908 * Add commit callback function, it returns a non-zero value to inform
909 * caller to use sync transaction if necessary.
911 static int tgt_last_commit_cb_add(struct thandle *th, struct lu_target *tgt,
912 struct obd_export *exp, __u64 transno)
914 struct tgt_last_committed_callback *ccb;
915 struct dt_txn_commit_cb *dcb;
923 ccb->llcc_exp = class_export_cb_get(exp);
924 ccb->llcc_transno = transno;
927 dcb->dcb_func = tgt_cb_last_committed;
928 INIT_LIST_HEAD(&dcb->dcb_linkage);
929 strlcpy(dcb->dcb_name, "tgt_cb_last_committed", sizeof(dcb->dcb_name));
931 rc = dt_trans_cb_add(th, dcb);
933 class_export_cb_put(exp);
937 if (exp_connect_flags(exp) & OBD_CONNECT_LIGHTWEIGHT)
938 /* report failure to force synchronous operation */
941 /* if exp_need_sync is set, return non-zero value to force
942 * a sync transaction. */
943 return rc ? rc : exp->exp_need_sync;
946 static int tgt_is_local_client(const struct lu_env *env,
947 struct obd_export *exp)
949 struct lu_target *tgt = class_exp2tgt(exp);
950 struct tgt_session_info *tsi = tgt_ses_info(env);
951 struct ptlrpc_request *req = tgt_ses_req(tsi);
953 if (exp_connect_flags(exp) & OBD_CONNECT_MDS ||
954 exp_connect_flags(exp) & OBD_CONNECT_MDS_MDS)
956 if (tgt->lut_local_recovery)
960 if (!LNetIsPeerLocal(req->rq_peer.nid))
967 * Add new client to the last_rcvd upon new connection.
969 * We use a bitmap to locate a free space in the last_rcvd file and initialize
972 int tgt_client_new(const struct lu_env *env, struct obd_export *exp)
974 struct tg_export_data *ted = &exp->exp_target_data;
975 struct lu_target *tgt = class_exp2tgt(exp);
980 LASSERT(tgt && tgt->lut_client_bitmap != NULL);
981 if (!strcmp(ted->ted_lcd->lcd_uuid, tgt->lut_obd->obd_uuid.uuid))
984 if (exp_connect_flags(exp) & OBD_CONNECT_LIGHTWEIGHT)
987 if (tgt_is_local_client(env, exp)) {
988 LCONSOLE_WARN("%s: local client %s w/o recovery\n",
989 exp->exp_obd->obd_name, ted->ted_lcd->lcd_uuid);
990 exp->exp_no_recovery = 1;
994 /* the bitmap operations can handle cl_idx > sizeof(long) * 8, so
995 * there's no need for extra complication here
997 idx = find_first_zero_bit(tgt->lut_client_bitmap, LR_MAX_CLIENTS);
999 if (idx >= LR_MAX_CLIENTS ||
1000 OBD_FAIL_CHECK(OBD_FAIL_MDS_CLIENT_ADD)) {
1001 CERROR("%s: no room for %u clients - fix LR_MAX_CLIENTS\n",
1002 tgt->lut_obd->obd_name, idx);
1005 if (test_and_set_bit(idx, tgt->lut_client_bitmap)) {
1006 idx = find_next_zero_bit(tgt->lut_client_bitmap,
1007 LR_MAX_CLIENTS, idx);
1011 ted->ted_lr_idx = idx;
1012 ted->ted_lr_off = tgt->lut_lsd.lsd_client_start +
1013 idx * tgt->lut_lsd.lsd_client_size;
1015 LASSERTF(ted->ted_lr_off > 0, "ted_lr_off = %llu\n", ted->ted_lr_off);
1017 if (tgt_is_multimodrpcs_client(exp)) {
1018 /* Set MULTI RPCS incompatibility flag to prevent previous
1019 * Lustre versions to mount a target with reply_data file */
1020 atomic_inc(&tgt->lut_num_clients);
1021 if (!(tgt->lut_lsd.lsd_feature_incompat &
1022 OBD_INCOMPAT_MULTI_RPCS)) {
1023 tgt->lut_lsd.lsd_feature_incompat |=
1024 OBD_INCOMPAT_MULTI_RPCS;
1025 rc = tgt_server_data_update(env, tgt, 1);
1027 CERROR("%s: unable to set MULTI RPCS "
1028 "incompatibility flag\n",
1029 exp->exp_obd->obd_name);
1034 /* assign client slot generation */
1035 ted->ted_lcd->lcd_generation =
1036 atomic_inc_return(&tgt->lut_client_generation);
1038 ted->ted_lcd->lcd_generation = 0;
1041 CDEBUG(D_INFO, "%s: new client at index %d (%llu) with UUID '%s' "
1043 tgt->lut_obd->obd_name, ted->ted_lr_idx, ted->ted_lr_off,
1044 ted->ted_lcd->lcd_uuid, ted->ted_lcd->lcd_generation);
1046 if (OBD_FAIL_CHECK(OBD_FAIL_TGT_CLIENT_ADD))
1049 rc = tgt_client_data_update(env, exp);
1051 CERROR("%s: Failed to write client lcd at idx %d, rc %d\n",
1052 tgt->lut_obd->obd_name, idx, rc);
1056 EXPORT_SYMBOL(tgt_client_new);
1058 /* Add an existing client to the MDS in-memory state based on
1059 * a client that was previously found in the last_rcvd file and
1060 * already has an assigned slot (idx >= 0).
1062 * It should not be possible to fail adding an existing client - otherwise
1063 * mdt_init_server_data() callsite needs to be fixed.
1065 int tgt_client_add(const struct lu_env *env, struct obd_export *exp, int idx)
1067 struct tg_export_data *ted = &exp->exp_target_data;
1068 struct lu_target *tgt = class_exp2tgt(exp);
1072 LASSERT(tgt && tgt->lut_client_bitmap != NULL);
1073 LASSERTF(idx >= 0, "%d\n", idx);
1075 if (!strcmp(ted->ted_lcd->lcd_uuid, tgt->lut_obd->obd_uuid.uuid) ||
1076 exp_connect_flags(exp) & OBD_CONNECT_LIGHTWEIGHT)
1079 if (test_and_set_bit(idx, tgt->lut_client_bitmap)) {
1080 CERROR("%s: client %d: bit already set in bitmap!!\n",
1081 tgt->lut_obd->obd_name, idx);
1084 atomic_inc(&tgt->lut_num_clients);
1086 CDEBUG(D_INFO, "%s: client at idx %d with UUID '%s' added, "
1088 tgt->lut_obd->obd_name, idx, ted->ted_lcd->lcd_uuid,
1089 ted->ted_lcd->lcd_generation);
1091 ted->ted_lr_idx = idx;
1092 ted->ted_lr_off = tgt->lut_lsd.lsd_client_start +
1093 idx * tgt->lut_lsd.lsd_client_size;
1095 mutex_init(&ted->ted_lcd_lock);
1097 LASSERTF(ted->ted_lr_off > 0, "ted_lr_off = %llu\n", ted->ted_lr_off);
1102 int tgt_client_del(const struct lu_env *env, struct obd_export *exp)
1104 struct tg_export_data *ted = &exp->exp_target_data;
1105 struct lu_target *tgt = class_exp2tgt(exp);
1110 LASSERT(ted->ted_lcd);
1112 if (unlikely(tgt == NULL)) {
1113 CDEBUG(D_ERROR, "%s: No target for connected export\n",
1114 class_exp2obd(exp)->obd_name);
1118 /* XXX if lcd_uuid were a real obd_uuid, I could use obd_uuid_equals */
1119 if (!strcmp((char *)ted->ted_lcd->lcd_uuid,
1120 (char *)tgt->lut_obd->obd_uuid.uuid) ||
1121 exp_connect_flags(exp) & OBD_CONNECT_LIGHTWEIGHT ||
1122 exp->exp_no_recovery)
1125 /* Slot may be not yet assigned, use case is race between Client
1126 * reconnect and forced eviction */
1127 if (ted->ted_lr_idx < 0) {
1128 CWARN("%s: client with UUID '%s' not in bitmap\n",
1129 tgt->lut_obd->obd_name, ted->ted_lcd->lcd_uuid);
1133 CDEBUG(D_INFO, "%s: del client at idx %u, off %lld, UUID '%s'\n",
1134 tgt->lut_obd->obd_name, ted->ted_lr_idx, ted->ted_lr_off,
1135 ted->ted_lcd->lcd_uuid);
1137 /* Clear the bit _after_ zeroing out the client so we don't
1138 race with filter_client_add and zero out new clients.*/
1139 if (!test_bit(ted->ted_lr_idx, tgt->lut_client_bitmap)) {
1140 CERROR("%s: client %u: bit already clear in bitmap!!\n",
1141 tgt->lut_obd->obd_name, ted->ted_lr_idx);
1145 /* Do not erase record for recoverable client. */
1146 if (exp->exp_flags & OBD_OPT_FAILOVER)
1149 if (OBD_FAIL_CHECK(OBD_FAIL_TGT_CLIENT_DEL))
1152 /* Make sure the server's last_transno is up to date.
1153 * This should be done before zeroing client slot so last_transno will
1154 * be in server data or in client data in case of failure */
1155 rc = tgt_server_data_update(env, tgt, 0);
1157 CERROR("%s: failed to update server data, skip client %s "
1158 "zeroing, rc %d\n", tgt->lut_obd->obd_name,
1159 ted->ted_lcd->lcd_uuid, rc);
1163 memset(ted->ted_lcd->lcd_uuid, 0, sizeof ted->ted_lcd->lcd_uuid);
1164 rc = tgt_client_data_update(env, exp);
1166 CDEBUG(rc == 0 ? D_INFO : D_ERROR,
1167 "%s: zeroing out client %s at idx %u (%llu), rc %d\n",
1168 tgt->lut_obd->obd_name, ted->ted_lcd->lcd_uuid,
1169 ted->ted_lr_idx, ted->ted_lr_off, rc);
1172 EXPORT_SYMBOL(tgt_client_del);
1174 static void tgt_clean_by_tag(struct obd_export *exp, __u64 xid, __u16 tag)
1176 struct tg_export_data *ted = &exp->exp_target_data;
1177 struct lu_target *lut = class_exp2tgt(exp);
1178 struct tg_reply_data *trd, *tmp;
1183 list_for_each_entry_safe(trd, tmp, &ted->ted_reply_list, trd_list) {
1184 if (trd->trd_tag != tag)
1187 LASSERT(ergo(tgt_is_increasing_xid_client(exp),
1188 trd->trd_reply.lrd_xid <= xid));
1190 ted->ted_release_tag++;
1191 tgt_release_reply_data(lut, ted, trd);
1195 static int tgt_add_reply_data(const struct lu_env *env, struct lu_target *tgt,
1196 struct tg_export_data *ted, struct tg_reply_data *trd,
1197 struct ptlrpc_request *req,
1198 struct thandle *th, bool update_lrd_file)
1200 struct lsd_reply_data *lrd;
1204 lrd = &trd->trd_reply;
1205 /* update export last transno */
1206 mutex_lock(&ted->ted_lcd_lock);
1207 if (lrd->lrd_transno > ted->ted_lcd->lcd_last_transno)
1208 ted->ted_lcd->lcd_last_transno = lrd->lrd_transno;
1209 mutex_unlock(&ted->ted_lcd_lock);
1212 /* find a empty slot */
1213 i = tgt_find_free_reply_slot(tgt);
1214 if (unlikely(i < 0)) {
1215 CERROR("%s: couldn't find a slot for reply data: "
1216 "rc = %d\n", tgt_name(tgt), i);
1221 if (update_lrd_file) {
1224 /* write reply data to disk */
1225 off = sizeof(struct lsd_reply_header) + sizeof(*lrd) * i;
1226 rc = tgt_reply_data_write(env, tgt, lrd, off, th);
1227 if (unlikely(rc != 0)) {
1228 CERROR("%s: can't update %s file: rc = %d\n",
1229 tgt_name(tgt), REPLY_DATA, rc);
1230 GOTO(free_slot, rc);
1234 trd->trd_index = TRD_INDEX_MEMORY;
1237 /* add reply data to target export's reply list */
1238 mutex_lock(&ted->ted_lcd_lock);
1240 int exclude = tgt_is_increasing_xid_client(req->rq_export) ?
1241 MSG_REPLAY : MSG_REPLAY|MSG_RESENT;
1243 if (req->rq_obsolete) {
1245 "drop reply data update for obsolete req xid=%llu,"
1246 "transno=%llu, tag=%hu\n", req->rq_xid,
1247 lrd->lrd_transno, trd->trd_tag);
1248 mutex_unlock(&ted->ted_lcd_lock);
1249 GOTO(free_slot, rc = -EBADR);
1252 if (!(lustre_msg_get_flags(req->rq_reqmsg) & exclude))
1253 tgt_clean_by_tag(req->rq_export, req->rq_xid,
1256 list_add(&trd->trd_list, &ted->ted_reply_list);
1257 ted->ted_reply_cnt++;
1258 if (ted->ted_reply_cnt > ted->ted_reply_max)
1259 ted->ted_reply_max = ted->ted_reply_cnt;
1260 mutex_unlock(&ted->ted_lcd_lock);
1262 CDEBUG(D_TRACE, "add reply %p: xid %llu, transno %llu, "
1263 "tag %hu, client gen %u, slot idx %d\n",
1264 trd, lrd->lrd_xid, lrd->lrd_transno,
1265 trd->trd_tag, lrd->lrd_client_gen, trd->trd_index);
1271 tgt_clear_reply_slot(tgt, trd->trd_index);
1275 int tgt_mk_reply_data(const struct lu_env *env,
1276 struct lu_target *tgt,
1277 struct tg_export_data *ted,
1278 struct ptlrpc_request *req,
1284 struct tg_reply_data *trd;
1285 struct lsd_reply_data *lrd;
1286 __u64 *pre_versions = NULL;
1290 if (unlikely(trd == NULL))
1293 /* fill reply data information */
1294 lrd = &trd->trd_reply;
1295 lrd->lrd_transno = transno;
1297 lrd->lrd_xid = req->rq_xid;
1298 trd->trd_tag = lustre_msg_get_tag(req->rq_reqmsg);
1299 lrd->lrd_client_gen = ted->ted_lcd->lcd_generation;
1301 pre_versions = lustre_msg_get_versions(req->rq_repmsg);
1302 lrd->lrd_result = th->th_result;
1305 struct tgt_session_info *tsi;
1307 LASSERT(env != NULL);
1308 tsi = tgt_ses_info(env);
1309 LASSERT(tsi->tsi_xid != 0);
1311 lrd->lrd_xid = tsi->tsi_xid;
1312 lrd->lrd_result = tsi->tsi_result;
1313 lrd->lrd_client_gen = tsi->tsi_client_gen;
1316 lrd->lrd_data = opdata;
1318 trd->trd_pre_versions[0] = pre_versions[0];
1319 trd->trd_pre_versions[1] = pre_versions[1];
1320 trd->trd_pre_versions[2] = pre_versions[2];
1321 trd->trd_pre_versions[3] = pre_versions[3];
1324 rc = tgt_add_reply_data(env, tgt, ted, trd, req,
1334 EXPORT_SYMBOL(tgt_mk_reply_data);
1337 * last_rcvd & last_committed update callbacks
1339 static int tgt_last_rcvd_update(const struct lu_env *env, struct lu_target *tgt,
1340 struct dt_object *obj, __u64 opdata,
1341 struct thandle *th, struct ptlrpc_request *req)
1343 struct tgt_thread_info *tti = tgt_th_info(env);
1344 struct tgt_session_info *tsi = tgt_ses_info(env);
1345 struct obd_export *exp = tsi->tsi_exp;
1346 struct tg_export_data *ted;
1354 LASSERT(exp != NULL);
1355 ted = &exp->exp_target_data;
1357 /* Some clients don't support recovery, and they don't have last_rcvd
1359 * 1. lightweight clients.
1360 * 2. local clients on MDS which doesn't enable "localrecov".
1361 * 3. OFD connect may cause transaction before export has last_rcvd
1364 if (ted->ted_lr_idx < 0)
1368 tti->tti_transno = lustre_msg_get_transno(req->rq_reqmsg);
1370 /* From update replay, tti_transno should be set already */
1371 LASSERT(tti->tti_transno != 0);
1373 spin_lock(&tgt->lut_translock);
1374 if (th->th_result != 0) {
1375 if (tti->tti_transno != 0) {
1376 CERROR("%s: replay transno %llu failed: rc = %d\n",
1377 tgt_name(tgt), tti->tti_transno, th->th_result);
1379 } else if (tti->tti_transno == 0) {
1380 tti->tti_transno = ++tgt->lut_last_transno;
1382 /* should be replay */
1383 if (tti->tti_transno > tgt->lut_last_transno)
1384 tgt->lut_last_transno = tti->tti_transno;
1386 spin_unlock(&tgt->lut_translock);
1388 /** VBR: set new versions */
1389 if (th->th_result == 0 && obj != NULL) {
1390 struct dt_object *dto = dt_object_locate(obj, th->th_dev);
1391 dt_version_set(env, dto, tti->tti_transno, th);
1394 /* filling reply data */
1395 CDEBUG(D_INODE, "transno = %llu, last_committed = %llu\n",
1396 tti->tti_transno, tgt->lut_obd->obd_last_committed);
1399 req->rq_transno = tti->tti_transno;
1400 lustre_msg_set_transno(req->rq_repmsg, tti->tti_transno);
1403 /* if can't add callback, do sync write */
1404 th->th_sync |= !!tgt_last_commit_cb_add(th, tgt, exp, tti->tti_transno);
1407 /* store transno in the last_rcvd header */
1408 spin_lock(&tgt->lut_translock);
1409 if (tti->tti_transno > tgt->lut_lsd.lsd_last_transno) {
1410 tgt->lut_lsd.lsd_last_transno = tti->tti_transno;
1411 spin_unlock(&tgt->lut_translock);
1412 /* Although current connection doesn't have slot
1413 * in the last_rcvd, we still want to maintain
1414 * the in-memory lsd_client_data structure in order to
1415 * properly handle reply reconstruction. */
1416 rc = tgt_server_data_write(env, tgt, th);
1418 spin_unlock(&tgt->lut_translock);
1420 } else if (ted->ted_lr_off == 0) {
1421 CERROR("%s: client idx %d has offset %lld\n",
1422 tgt_name(tgt), ted->ted_lr_idx, ted->ted_lr_off);
1426 /* Target that supports multiple reply data */
1427 if (tgt_is_multimodrpcs_client(exp)) {
1428 return tgt_mk_reply_data(env, tgt, ted, req, opdata, th,
1429 !!(req != NULL), tti->tti_transno);
1432 /* Enough for update replay, let's return */
1436 mutex_lock(&ted->ted_lcd_lock);
1437 LASSERT(ergo(tti->tti_transno == 0, th->th_result != 0));
1438 if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE) {
1439 transno_p = &ted->ted_lcd->lcd_last_close_transno;
1440 ted->ted_lcd->lcd_last_close_xid = req->rq_xid;
1441 ted->ted_lcd->lcd_last_close_result = th->th_result;
1443 /* VBR: save versions in last_rcvd for reconstruct. */
1444 __u64 *pre_versions = lustre_msg_get_versions(req->rq_repmsg);
1447 ted->ted_lcd->lcd_pre_versions[0] = pre_versions[0];
1448 ted->ted_lcd->lcd_pre_versions[1] = pre_versions[1];
1449 ted->ted_lcd->lcd_pre_versions[2] = pre_versions[2];
1450 ted->ted_lcd->lcd_pre_versions[3] = pre_versions[3];
1452 transno_p = &ted->ted_lcd->lcd_last_transno;
1453 ted->ted_lcd->lcd_last_xid = req->rq_xid;
1454 ted->ted_lcd->lcd_last_result = th->th_result;
1455 /* XXX: lcd_last_data is __u32 but intent_dispostion is __u64,
1456 * see struct ldlm_reply->lock_policy_res1; */
1457 ted->ted_lcd->lcd_last_data = opdata;
1460 /* Update transno in slot only if non-zero number, i.e. no errors */
1461 if (likely(tti->tti_transno != 0)) {
1462 /* Don't overwrite bigger transaction number with lower one.
1463 * That is not sign of problem in all cases, but in any case
1464 * this value should be monotonically increased only. */
1465 if (*transno_p > tti->tti_transno) {
1466 if (!tgt->lut_no_reconstruct) {
1467 CERROR("%s: trying to overwrite bigger transno:"
1468 "on-disk: %llu, new: %llu replay: "
1469 "%d. See LU-617.\n", tgt_name(tgt),
1470 *transno_p, tti->tti_transno,
1471 req_is_replay(req));
1472 if (req_is_replay(req)) {
1473 spin_lock(&req->rq_export->exp_lock);
1474 req->rq_export->exp_vbr_failed = 1;
1475 spin_unlock(&req->rq_export->exp_lock);
1477 mutex_unlock(&ted->ted_lcd_lock);
1478 RETURN(req_is_replay(req) ? -EOVERFLOW : 0);
1481 *transno_p = tti->tti_transno;
1486 tti->tti_off = ted->ted_lr_off;
1487 if (CFS_FAIL_CHECK(OBD_FAIL_TGT_RCVD_EIO))
1490 rc = tgt_client_data_write(env, tgt, ted->ted_lcd,
1493 mutex_unlock(&ted->ted_lcd_lock);
1497 mutex_unlock(&ted->ted_lcd_lock);
1502 * last_rcvd update for echo client simulation.
1503 * It updates last_rcvd client slot and version of object in
1504 * simple way but with all locks to simulate all drawbacks
1506 static int tgt_last_rcvd_update_echo(const struct lu_env *env,
1507 struct lu_target *tgt,
1508 struct dt_object *obj,
1510 struct obd_export *exp)
1512 struct tgt_thread_info *tti = tgt_th_info(env);
1513 struct tg_export_data *ted = &exp->exp_target_data;
1518 tti->tti_transno = 0;
1520 spin_lock(&tgt->lut_translock);
1521 if (th->th_result == 0)
1522 tti->tti_transno = ++tgt->lut_last_transno;
1523 spin_unlock(&tgt->lut_translock);
1525 /** VBR: set new versions */
1526 if (th->th_result == 0 && obj != NULL)
1527 dt_version_set(env, obj, tti->tti_transno, th);
1529 /* if can't add callback, do sync write */
1530 th->th_sync |= !!tgt_last_commit_cb_add(th, tgt, exp,
1533 LASSERT(ted->ted_lr_off > 0);
1535 mutex_lock(&ted->ted_lcd_lock);
1536 LASSERT(ergo(tti->tti_transno == 0, th->th_result != 0));
1537 ted->ted_lcd->lcd_last_transno = tti->tti_transno;
1538 ted->ted_lcd->lcd_last_result = th->th_result;
1540 tti->tti_off = ted->ted_lr_off;
1541 rc = tgt_client_data_write(env, tgt, ted->ted_lcd, &tti->tti_off, th);
1542 mutex_unlock(&ted->ted_lcd_lock);
1546 static int tgt_clients_data_init(const struct lu_env *env,
1547 struct lu_target *tgt,
1548 unsigned long last_size)
1550 struct obd_device *obd = tgt->lut_obd;
1551 struct lr_server_data *lsd = &tgt->lut_lsd;
1552 struct lsd_client_data *lcd = NULL;
1553 struct tg_export_data *ted;
1556 loff_t off = lsd->lsd_client_start;
1557 __u32 generation = 0;
1558 struct cfs_hash *hash = NULL;
1562 if (tgt->lut_bottom->dd_rdonly)
1565 BUILD_BUG_ON(offsetof(struct lsd_client_data, lcd_padding) +
1566 sizeof(lcd->lcd_padding) != LR_CLIENT_SIZE);
1572 hash = cfs_hash_getref(tgt->lut_obd->obd_gen_hash);
1574 GOTO(err_out, rc = -ENODEV);
1576 for (cl_idx = 0; off < last_size; cl_idx++) {
1577 struct obd_export *exp;
1580 /* Don't assume off is incremented properly by
1581 * read_record(), in case sizeof(*lcd)
1582 * isn't the same as fsd->lsd_client_size. */
1583 off = lsd->lsd_client_start + cl_idx * lsd->lsd_client_size;
1584 rc = tgt_client_data_read(env, tgt, lcd, &off, cl_idx);
1586 CERROR("%s: error reading last_rcvd %s idx %d off "
1587 "%llu: rc = %d\n", tgt_name(tgt), LAST_RCVD,
1590 break; /* read error shouldn't cause startup to fail */
1593 if (lcd->lcd_uuid[0] == '\0') {
1594 CDEBUG(D_INFO, "skipping zeroed client at offset %d\n",
1599 last_transno = lcd_last_transno(lcd);
1601 /* These exports are cleaned up by disconnect, so they
1602 * need to be set up like real exports as connect does.
1604 CDEBUG(D_HA, "RCVRNG CLIENT uuid: %s idx: %d lr: %llu"
1605 " srv lr: %llu lx: %llu gen %u\n", lcd->lcd_uuid,
1606 cl_idx, last_transno, lsd->lsd_last_transno,
1607 lcd_last_xid(lcd), lcd->lcd_generation);
1609 exp = class_new_export(obd, (struct obd_uuid *)lcd->lcd_uuid);
1611 if (PTR_ERR(exp) == -EALREADY) {
1612 /* export already exists, zero out this one */
1613 CERROR("%s: Duplicate export %s!\n",
1614 tgt_name(tgt), lcd->lcd_uuid);
1617 GOTO(err_out, rc = PTR_ERR(exp));
1620 ted = &exp->exp_target_data;
1621 *ted->ted_lcd = *lcd;
1623 rc = tgt_client_add(env, exp, cl_idx);
1624 LASSERTF(rc == 0, "rc = %d\n", rc); /* can't fail existing */
1625 /* VBR: set export last committed version */
1626 exp->exp_last_committed = last_transno;
1627 spin_lock(&exp->exp_lock);
1628 exp->exp_connecting = 0;
1629 exp->exp_in_recovery = 0;
1630 spin_unlock(&exp->exp_lock);
1631 atomic_inc(&obd->obd_max_recoverable_clients);
1633 if (tgt->lut_lsd.lsd_feature_incompat &
1634 OBD_INCOMPAT_MULTI_RPCS &&
1635 lcd->lcd_generation != 0) {
1636 /* compute the highest valid client generation */
1637 generation = max(generation, lcd->lcd_generation);
1638 /* fill client_generation <-> export hash table */
1639 rc = cfs_hash_add_unique(hash, &lcd->lcd_generation,
1640 &exp->exp_gen_hash);
1642 CERROR("%s: duplicate export for client "
1644 tgt_name(tgt), lcd->lcd_generation);
1645 class_export_put(exp);
1650 class_export_put(exp);
1652 rc = rev_import_init(exp);
1654 class_unlink_export(exp);
1658 /* Need to check last_rcvd even for duplicated exports. */
1659 CDEBUG(D_OTHER, "client at idx %d has last_transno = %llu\n",
1660 cl_idx, last_transno);
1662 spin_lock(&tgt->lut_translock);
1663 tgt->lut_last_transno = max(last_transno,
1664 tgt->lut_last_transno);
1665 spin_unlock(&tgt->lut_translock);
1668 /* record highest valid client generation */
1669 atomic_set(&tgt->lut_client_generation, generation);
1673 cfs_hash_putref(hash);
1678 struct server_compat_data {
1685 static struct server_compat_data tgt_scd[] = {
1686 [LDD_F_SV_TYPE_MDT] = {
1687 .rocompat = OBD_ROCOMPAT_LOVOBJID,
1688 .incompat = OBD_INCOMPAT_MDT | OBD_INCOMPAT_COMMON_LR |
1689 OBD_INCOMPAT_FID | OBD_INCOMPAT_IAM_DIR |
1690 OBD_INCOMPAT_LMM_VER | OBD_INCOMPAT_MULTI_OI |
1691 OBD_INCOMPAT_MULTI_RPCS,
1692 .rocinit = OBD_ROCOMPAT_LOVOBJID,
1693 .incinit = OBD_INCOMPAT_MDT | OBD_INCOMPAT_COMMON_LR |
1694 OBD_INCOMPAT_MULTI_OI,
1696 [LDD_F_SV_TYPE_OST] = {
1697 .rocompat = OBD_ROCOMPAT_IDX_IN_IDIF,
1698 .incompat = OBD_INCOMPAT_OST | OBD_INCOMPAT_COMMON_LR |
1700 .rocinit = OBD_ROCOMPAT_IDX_IN_IDIF,
1701 .incinit = OBD_INCOMPAT_OST | OBD_INCOMPAT_COMMON_LR,
1705 int tgt_server_data_init(const struct lu_env *env, struct lu_target *tgt)
1707 struct tgt_thread_info *tti = tgt_th_info(env);
1708 struct lr_server_data *lsd = &tgt->lut_lsd;
1709 unsigned long last_rcvd_size;
1713 rc = dt_attr_get(env, tgt->lut_last_rcvd, &tti->tti_attr);
1717 last_rcvd_size = (unsigned long)tti->tti_attr.la_size;
1719 /* ensure padding in the struct is the correct size */
1720 BUILD_BUG_ON(offsetof(struct lr_server_data, lsd_padding) +
1721 sizeof(lsd->lsd_padding) != LR_SERVER_SIZE);
1723 rc = server_name2index(tgt_name(tgt), &index, NULL);
1725 CERROR("%s: Can not get index from name: rc = %d\n",
1729 /* server_name2index() returns type */
1731 if (type != LDD_F_SV_TYPE_MDT && type != LDD_F_SV_TYPE_OST) {
1732 CERROR("%s: unknown target type %x\n", tgt_name(tgt), type);
1736 /* last_rcvd on OST doesn't provide reconstruct support because there
1737 * may be up to 8 in-flight write requests per single slot in
1738 * last_rcvd client data
1740 tgt->lut_no_reconstruct = (type == LDD_F_SV_TYPE_OST);
1742 if (last_rcvd_size == 0) {
1743 LCONSOLE_WARN("%s: new disk, initializing\n", tgt_name(tgt));
1745 memcpy(lsd->lsd_uuid, tgt->lut_obd->obd_uuid.uuid,
1746 sizeof(lsd->lsd_uuid));
1747 lsd->lsd_last_transno = 0;
1748 lsd->lsd_mount_count = 0;
1749 lsd->lsd_server_size = LR_SERVER_SIZE;
1750 lsd->lsd_client_start = LR_CLIENT_START;
1751 lsd->lsd_client_size = LR_CLIENT_SIZE;
1752 lsd->lsd_subdir_count = OBJ_SUBDIR_COUNT;
1753 lsd->lsd_osd_index = index;
1754 lsd->lsd_feature_rocompat = tgt_scd[type].rocinit;
1755 lsd->lsd_feature_incompat = tgt_scd[type].incinit;
1757 rc = tgt_server_data_read(env, tgt);
1759 CERROR("%s: error reading LAST_RCVD: rc= %d\n",
1763 if (strcmp(lsd->lsd_uuid, tgt->lut_obd->obd_uuid.uuid)) {
1764 if (tgt->lut_bottom->dd_rdonly) {
1765 /* Such difference may be caused by mounting
1766 * up snapshot with new fsname under rd_only
1767 * mode. But even if it was NOT, it will not
1768 * damage the system because of "rd_only". */
1769 memcpy(lsd->lsd_uuid,
1770 tgt->lut_obd->obd_uuid.uuid,
1771 sizeof(lsd->lsd_uuid));
1773 LCONSOLE_ERROR_MSG(0x157, "Trying to start "
1774 "OBD %s using the wrong "
1775 "disk %s. Were the /dev/ "
1776 "assignments rearranged?\n",
1777 tgt->lut_obd->obd_uuid.uuid,
1783 if (lsd->lsd_osd_index != index) {
1784 LCONSOLE_ERROR_MSG(0x157,
1785 "%s: index %d in last rcvd is different with the index %d in config log, It might be disk corruption!\n",
1787 lsd->lsd_osd_index, index);
1792 if (lsd->lsd_feature_incompat & ~tgt_scd[type].incompat) {
1793 CERROR("%s: unsupported incompat filesystem feature(s) %x\n",
1795 lsd->lsd_feature_incompat & ~tgt_scd[type].incompat);
1799 if (type == LDD_F_SV_TYPE_MDT)
1800 lsd->lsd_feature_incompat |= OBD_INCOMPAT_FID;
1802 if (lsd->lsd_feature_rocompat & ~tgt_scd[type].rocompat) {
1803 CERROR("%s: unsupported read-only filesystem feature(s) %x\n",
1805 lsd->lsd_feature_rocompat & ~tgt_scd[type].rocompat);
1808 /** Interop: evict all clients at first boot with 1.8 last_rcvd */
1809 if (type == LDD_F_SV_TYPE_MDT &&
1810 !(lsd->lsd_feature_compat & OBD_COMPAT_20)) {
1811 if (last_rcvd_size > lsd->lsd_client_start) {
1812 LCONSOLE_WARN("%s: mounting at first time on 1.8 FS, "
1813 "remove all clients for interop needs\n",
1815 rc = tgt_truncate_last_rcvd(env, tgt,
1816 lsd->lsd_client_start);
1819 last_rcvd_size = lsd->lsd_client_start;
1821 /** set 2.0 flag to upgrade/downgrade between 1.8 and 2.0 */
1822 lsd->lsd_feature_compat |= OBD_COMPAT_20;
1825 spin_lock(&tgt->lut_translock);
1826 tgt->lut_last_transno = lsd->lsd_last_transno;
1827 spin_unlock(&tgt->lut_translock);
1829 lsd->lsd_mount_count++;
1831 CDEBUG(D_INODE, "=======,=BEGIN DUMPING LAST_RCVD========\n");
1832 CDEBUG(D_INODE, "%s: server last_transno: %llu\n",
1833 tgt_name(tgt), tgt->lut_last_transno);
1834 CDEBUG(D_INODE, "%s: server mount_count: %llu\n",
1835 tgt_name(tgt), lsd->lsd_mount_count);
1836 CDEBUG(D_INODE, "%s: server data size: %u\n",
1837 tgt_name(tgt), lsd->lsd_server_size);
1838 CDEBUG(D_INODE, "%s: per-client data start: %u\n",
1839 tgt_name(tgt), lsd->lsd_client_start);
1840 CDEBUG(D_INODE, "%s: per-client data size: %u\n",
1841 tgt_name(tgt), lsd->lsd_client_size);
1842 CDEBUG(D_INODE, "%s: last_rcvd size: %lu\n",
1843 tgt_name(tgt), last_rcvd_size);
1844 CDEBUG(D_INODE, "%s: server subdir_count: %u\n",
1845 tgt_name(tgt), lsd->lsd_subdir_count);
1846 CDEBUG(D_INODE, "%s: last_rcvd clients: %lu\n", tgt_name(tgt),
1847 last_rcvd_size <= lsd->lsd_client_start ? 0 :
1848 (last_rcvd_size - lsd->lsd_client_start) /
1849 lsd->lsd_client_size);
1850 CDEBUG(D_INODE, "========END DUMPING LAST_RCVD========\n");
1852 if (lsd->lsd_server_size == 0 || lsd->lsd_client_start == 0 ||
1853 lsd->lsd_client_size == 0) {
1854 CERROR("%s: bad last_rcvd contents!\n", tgt_name(tgt));
1858 if (!tgt->lut_obd->obd_replayable)
1859 CWARN("%s: recovery support OFF\n", tgt_name(tgt));
1861 rc = tgt_clients_data_init(env, tgt, last_rcvd_size);
1863 GOTO(err_client, rc);
1865 spin_lock(&tgt->lut_translock);
1866 /* obd_last_committed is used for compatibility
1867 * with other lustre recovery code */
1868 tgt->lut_obd->obd_last_committed = tgt->lut_last_transno;
1869 spin_unlock(&tgt->lut_translock);
1871 tgt->lut_obd->u.obt.obt_mount_count = lsd->lsd_mount_count;
1872 tgt->lut_obd->u.obt.obt_instance = (__u32)lsd->lsd_mount_count;
1874 /* save it, so mount count and last_transno is current */
1875 rc = tgt_server_data_update(env, tgt, 0);
1877 GOTO(err_client, rc);
1882 class_disconnect_exports(tgt->lut_obd);
1886 /* add credits for last_rcvd update */
1887 int tgt_txn_start_cb(const struct lu_env *env, struct thandle *th,
1890 struct lu_target *tgt = cookie;
1891 struct tgt_session_info *tsi;
1892 struct tgt_thread_info *tti = tgt_th_info(env);
1893 struct dt_object *dto;
1896 /* For readonly case, the caller should have got failure
1897 * when start the transaction. If the logic comes here,
1898 * there must be something wrong. */
1899 if (unlikely(tgt->lut_bottom->dd_rdonly)) {
1904 /* if there is no session, then this transaction is not result of
1905 * request processing but some local operation */
1906 if (env->le_ses == NULL)
1909 LASSERT(tgt->lut_last_rcvd);
1910 tsi = tgt_ses_info(env);
1911 /* OFD may start transaction without export assigned */
1912 if (tsi->tsi_exp == NULL)
1915 if (tgt_is_multimodrpcs_client(tsi->tsi_exp)) {
1917 * Use maximum possible file offset for declaration to ensure
1918 * ZFS will reserve enough credits for a write anywhere in this
1919 * file, since we don't know where in the file the write will be
1920 * because a replay slot has not been assigned. This should be
1921 * replaced by dmu_tx_hold_append() when available.
1923 tti->tti_buf.lb_buf = NULL;
1924 tti->tti_buf.lb_len = sizeof(struct lsd_reply_data);
1925 dto = dt_object_locate(tgt->lut_reply_data, th->th_dev);
1926 rc = dt_declare_record_write(env, dto, &tti->tti_buf, -1, th);
1930 dto = dt_object_locate(tgt->lut_last_rcvd, th->th_dev);
1932 tti->tti_off = tsi->tsi_exp->exp_target_data.ted_lr_off;
1933 rc = dt_declare_record_write(env, dto, &tti->tti_buf,
1939 if (tsi->tsi_vbr_obj != NULL &&
1940 !lu_object_remote(&tsi->tsi_vbr_obj->do_lu)) {
1941 dto = dt_object_locate(tsi->tsi_vbr_obj, th->th_dev);
1942 rc = dt_declare_version_set(env, dto, th);
1948 /* Update last_rcvd records with latests transaction data */
1949 int tgt_txn_stop_cb(const struct lu_env *env, struct thandle *th,
1952 struct lu_target *tgt = cookie;
1953 struct tgt_session_info *tsi;
1954 struct tgt_thread_info *tti = tgt_th_info(env);
1955 struct dt_object *obj = NULL;
1959 if (env->le_ses == NULL)
1962 tsi = tgt_ses_info(env);
1963 /* OFD may start transaction without export assigned */
1964 if (tsi->tsi_exp == NULL)
1967 echo_client = (tgt_ses_req(tsi) == NULL && tsi->tsi_xid == 0);
1969 if (tti->tti_has_trans && !echo_client) {
1970 if (tti->tti_mult_trans == 0) {
1971 CDEBUG(D_HA, "More than one transaction %llu\n",
1975 /* we need another transno to be assigned */
1976 tti->tti_transno = 0;
1977 } else if (th->th_result == 0) {
1978 tti->tti_has_trans = 1;
1981 if (tsi->tsi_vbr_obj != NULL &&
1982 !lu_object_remote(&tsi->tsi_vbr_obj->do_lu)) {
1983 obj = tsi->tsi_vbr_obj;
1986 if (unlikely(echo_client)) /* echo client special case */
1987 rc = tgt_last_rcvd_update_echo(env, tgt, obj, th,
1990 rc = tgt_last_rcvd_update(env, tgt, obj, tsi->tsi_opdata, th,
1995 int tgt_reply_data_init(const struct lu_env *env, struct lu_target *tgt)
1997 struct tgt_thread_info *tti = tgt_th_info(env);
1998 struct lsd_reply_data *lrd = &tti->tti_lrd;
1999 unsigned long reply_data_size;
2001 struct lsd_reply_header *lrh = NULL;
2002 struct tg_reply_data *trd = NULL;
2005 struct cfs_hash *hash = NULL;
2006 struct obd_export *exp;
2007 struct tg_export_data *ted;
2008 int reply_data_recovered = 0;
2010 rc = dt_attr_get(env, tgt->lut_reply_data, &tti->tti_attr);
2013 reply_data_size = (unsigned long)tti->tti_attr.la_size;
2017 GOTO(out, rc = -ENOMEM);
2019 if (reply_data_size == 0) {
2020 CDEBUG(D_INFO, "%s: new reply_data file, initializing\n",
2022 lrh->lrh_magic = LRH_MAGIC;
2023 lrh->lrh_header_size = sizeof(struct lsd_reply_header);
2024 lrh->lrh_reply_size = sizeof(struct lsd_reply_data);
2025 rc = tgt_reply_header_write(env, tgt, lrh);
2027 CERROR("%s: error writing %s: rc = %d\n",
2028 tgt_name(tgt), REPLY_DATA, rc);
2032 rc = tgt_reply_header_read(env, tgt, lrh);
2034 CERROR("%s: error reading %s: rc = %d\n",
2035 tgt_name(tgt), REPLY_DATA, rc);
2038 if (lrh->lrh_magic != LRH_MAGIC ||
2039 lrh->lrh_header_size != sizeof(struct lsd_reply_header) ||
2040 lrh->lrh_reply_size != sizeof(struct lsd_reply_data)) {
2041 CERROR("%s: invalid header in %s\n",
2042 tgt_name(tgt), REPLY_DATA);
2043 GOTO(out, rc = -EINVAL);
2046 hash = cfs_hash_getref(tgt->lut_obd->obd_gen_hash);
2048 GOTO(out, rc = -ENODEV);
2052 GOTO(out, rc = -ENOMEM);
2054 /* Load reply_data from disk */
2055 for (idx = 0, off = sizeof(struct lsd_reply_header);
2056 off < reply_data_size;
2057 idx++, off += sizeof(struct lsd_reply_data)) {
2058 rc = tgt_reply_data_read(env, tgt, lrd, off);
2060 CERROR("%s: error reading %s: rc = %d\n",
2061 tgt_name(tgt), REPLY_DATA, rc);
2065 exp = cfs_hash_lookup(hash, &lrd->lrd_client_gen);
2067 /* old reply data from a disconnected client */
2070 ted = &exp->exp_target_data;
2071 mutex_lock(&ted->ted_lcd_lock);
2073 /* create in-memory reply_data and link it to
2074 * target export's reply list */
2075 rc = tgt_set_reply_slot(tgt, idx);
2077 mutex_unlock(&ted->ted_lcd_lock);
2080 trd->trd_reply = *lrd;
2081 trd->trd_pre_versions[0] = 0;
2082 trd->trd_pre_versions[1] = 0;
2083 trd->trd_pre_versions[2] = 0;
2084 trd->trd_pre_versions[3] = 0;
2085 trd->trd_index = idx;
2087 list_add(&trd->trd_list, &ted->ted_reply_list);
2088 ted->ted_reply_cnt++;
2089 if (ted->ted_reply_cnt > ted->ted_reply_max)
2090 ted->ted_reply_max = ted->ted_reply_cnt;
2092 CDEBUG(D_HA, "%s: restore reply %p: xid %llu, "
2093 "transno %llu, client gen %u, slot idx %d\n",
2094 tgt_name(tgt), trd, lrd->lrd_xid,
2095 lrd->lrd_transno, lrd->lrd_client_gen,
2098 /* update export last committed transation */
2099 exp->exp_last_committed = max(exp->exp_last_committed,
2101 /* Update lcd_last_transno as well for check in
2102 * tgt_release_reply_data() or the latest client
2103 * transno can be lost.
2105 ted->ted_lcd->lcd_last_transno =
2106 max(ted->ted_lcd->lcd_last_transno,
2107 exp->exp_last_committed);
2109 mutex_unlock(&ted->ted_lcd_lock);
2110 class_export_put(exp);
2112 /* update target last committed transaction */
2113 spin_lock(&tgt->lut_translock);
2114 tgt->lut_last_transno = max(tgt->lut_last_transno,
2116 spin_unlock(&tgt->lut_translock);
2118 reply_data_recovered++;
2122 GOTO(out, rc = -ENOMEM);
2124 CDEBUG(D_INFO, "%s: %d reply data have been recovered\n",
2125 tgt_name(tgt), reply_data_recovered);
2128 spin_lock(&tgt->lut_translock);
2129 /* obd_last_committed is used for compatibility
2130 * with other lustre recovery code */
2131 tgt->lut_obd->obd_last_committed = tgt->lut_last_transno;
2132 spin_unlock(&tgt->lut_translock);
2138 cfs_hash_putref(hash);
2146 static int tgt_check_lookup_req(struct ptlrpc_request *req, int lookup,
2147 struct tg_reply_data *trd)
2149 struct tg_export_data *ted = &req->rq_export->exp_target_data;
2150 struct lu_target *lut = class_exp2tgt(req->rq_export);
2151 __u16 tag = lustre_msg_get_tag(req->rq_reqmsg);
2153 struct tg_reply_data *reply;
2154 bool check_increasing;
2159 check_increasing = tgt_is_increasing_xid_client(req->rq_export) &&
2160 !(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY);
2161 if (!lookup && !check_increasing)
2164 list_for_each_entry(reply, &ted->ted_reply_list, trd_list) {
2165 if (lookup && reply->trd_reply.lrd_xid == req->rq_xid) {
2170 } else if (check_increasing && reply->trd_tag == tag &&
2171 reply->trd_reply.lrd_xid > req->rq_xid) {
2173 CERROR("%s: busy tag=%u req_xid=%llu, trd=%p: xid=%llu transno=%llu client_gen=%u slot_idx=%d: rc = %d\n",
2174 tgt_name(lut), tag, req->rq_xid, trd,
2175 reply->trd_reply.lrd_xid,
2176 reply->trd_reply.lrd_transno,
2177 reply->trd_reply.lrd_client_gen,
2178 reply->trd_index, rc);
2186 /* Look for a reply data matching specified request @req
2187 * A copy is returned in @trd if the pointer is not NULL
2189 int tgt_lookup_reply(struct ptlrpc_request *req, struct tg_reply_data *trd)
2191 struct tg_export_data *ted = &req->rq_export->exp_target_data;
2193 bool not_replay = !(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY);
2195 mutex_lock(&ted->ted_lcd_lock);
2196 if (not_replay && req->rq_xid <= req->rq_export->exp_last_xid) {
2197 /* A check for the last_xid is needed here in case there is
2198 * no reply data is left in the list. It may happen if another
2199 * RPC on another slot increased the last_xid between our
2200 * process_req_last_xid & tgt_lookup_reply calls */
2203 found = tgt_check_lookup_req(req, 1, trd);
2205 mutex_unlock(&ted->ted_lcd_lock);
2207 CDEBUG(D_TRACE, "%s: lookup reply xid %llu, found %d last_xid %llu\n",
2208 tgt_name(class_exp2tgt(req->rq_export)), req->rq_xid, found,
2209 req->rq_export->exp_last_xid);
2213 EXPORT_SYMBOL(tgt_lookup_reply);
2215 int tgt_handle_received_xid(struct obd_export *exp, __u64 rcvd_xid)
2217 struct tg_export_data *ted = &exp->exp_target_data;
2218 struct lu_target *lut = class_exp2tgt(exp);
2219 struct tg_reply_data *trd, *tmp;
2222 list_for_each_entry_safe(trd, tmp, &ted->ted_reply_list, trd_list) {
2223 if (trd->trd_reply.lrd_xid > rcvd_xid)
2225 ted->ted_release_xid++;
2226 tgt_release_reply_data(lut, ted, trd);
2232 int tgt_handle_tag(struct ptlrpc_request *req)
2234 return tgt_check_lookup_req(req, 0, NULL);