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 if (th->th_reserved_quota.qrr_count > 0) {
876 struct lu_env temp_env;
879 CDEBUG(D_QUOTA, "free quota %llu %llu\n",
880 th->th_reserved_quota.qrr_id.qid_gid,
881 th->th_reserved_quota.qrr_count);
883 rc = lu_env_init(&temp_env, LCT_DT_THREAD);
885 CERROR("%s: can't initialize environment: rc = %d\n",
886 ccb->llcc_tgt->lut_obd->obd_name, rc);
890 dt_reserve_or_free_quota(&temp_env, th->th_dev,
891 th->th_reserved_quota.qrr_type,
892 th->th_reserved_quota.qrr_id.qid_uid,
893 th->th_reserved_quota.qrr_id.qid_gid,
894 -th->th_reserved_quota.qrr_count,
896 lu_env_fini(&temp_env);
899 /* error hit, don't update last committed to provide chance to
900 * replay data after fail */
904 /* Fast path w/o spinlock, if exp_last_committed was updated
905 * with higher transno, no need to take spinlock and check,
906 * also no need to update obd_last_committed. */
907 if (ccb->llcc_transno <= ccb->llcc_exp->exp_last_committed)
909 spin_lock(&ccb->llcc_tgt->lut_translock);
910 if (ccb->llcc_transno > ccb->llcc_tgt->lut_obd->obd_last_committed)
911 ccb->llcc_tgt->lut_obd->obd_last_committed = ccb->llcc_transno;
913 if (ccb->llcc_transno > ccb->llcc_exp->exp_last_committed) {
914 ccb->llcc_exp->exp_last_committed = ccb->llcc_transno;
915 spin_unlock(&ccb->llcc_tgt->lut_translock);
917 ptlrpc_commit_replies(ccb->llcc_exp);
918 tgt_cancel_slc_locks(ccb->llcc_tgt, ccb->llcc_transno);
920 spin_unlock(&ccb->llcc_tgt->lut_translock);
923 CDEBUG(D_HA, "%s: transno %lld is committed\n",
924 ccb->llcc_tgt->lut_obd->obd_name, ccb->llcc_transno);
927 class_export_cb_put(ccb->llcc_exp);
932 * Add commit callback function, it returns a non-zero value to inform
933 * caller to use sync transaction if necessary.
935 static int tgt_last_commit_cb_add(struct thandle *th, struct lu_target *tgt,
936 struct obd_export *exp, __u64 transno)
938 struct tgt_last_committed_callback *ccb;
939 struct dt_txn_commit_cb *dcb;
947 ccb->llcc_exp = class_export_cb_get(exp);
948 ccb->llcc_transno = transno;
951 dcb->dcb_func = tgt_cb_last_committed;
952 INIT_LIST_HEAD(&dcb->dcb_linkage);
953 strlcpy(dcb->dcb_name, "tgt_cb_last_committed", sizeof(dcb->dcb_name));
955 rc = dt_trans_cb_add(th, dcb);
957 class_export_cb_put(exp);
961 if (exp_connect_flags(exp) & OBD_CONNECT_LIGHTWEIGHT)
962 /* report failure to force synchronous operation */
965 /* if exp_need_sync is set, return non-zero value to force
966 * a sync transaction. */
967 return rc ? rc : exp->exp_need_sync;
970 static int tgt_is_local_client(const struct lu_env *env,
971 struct obd_export *exp)
973 struct lu_target *tgt = class_exp2tgt(exp);
974 struct tgt_session_info *tsi = tgt_ses_info(env);
975 struct ptlrpc_request *req = tgt_ses_req(tsi);
978 if (exp_connect_flags(exp) & OBD_CONNECT_MDS ||
979 exp_connect_flags(exp) & OBD_CONNECT_MDS_MDS)
981 if (tgt->lut_local_recovery)
985 lnet_nid4_to_nid(req->rq_peer.nid, &nid);
986 if (!LNetIsPeerLocal(&nid))
993 * Add new client to the last_rcvd upon new connection.
995 * We use a bitmap to locate a free space in the last_rcvd file and initialize
998 int tgt_client_new(const struct lu_env *env, struct obd_export *exp)
1000 struct tg_export_data *ted = &exp->exp_target_data;
1001 struct lu_target *tgt = class_exp2tgt(exp);
1006 LASSERT(tgt && tgt->lut_client_bitmap != NULL);
1007 if (!strcmp(ted->ted_lcd->lcd_uuid, tgt->lut_obd->obd_uuid.uuid))
1010 if (exp_connect_flags(exp) & OBD_CONNECT_LIGHTWEIGHT)
1013 if (tgt_is_local_client(env, exp)) {
1014 LCONSOLE_WARN("%s: local client %s w/o recovery\n",
1015 exp->exp_obd->obd_name, ted->ted_lcd->lcd_uuid);
1016 exp->exp_no_recovery = 1;
1020 /* the bitmap operations can handle cl_idx > sizeof(long) * 8, so
1021 * there's no need for extra complication here
1023 idx = find_first_zero_bit(tgt->lut_client_bitmap, LR_MAX_CLIENTS);
1025 if (idx >= LR_MAX_CLIENTS ||
1026 OBD_FAIL_CHECK(OBD_FAIL_MDS_CLIENT_ADD)) {
1027 CERROR("%s: no room for %u clients - fix LR_MAX_CLIENTS\n",
1028 tgt->lut_obd->obd_name, idx);
1031 if (test_and_set_bit(idx, tgt->lut_client_bitmap)) {
1032 idx = find_next_zero_bit(tgt->lut_client_bitmap,
1033 LR_MAX_CLIENTS, idx);
1037 ted->ted_lr_idx = idx;
1038 ted->ted_lr_off = tgt->lut_lsd.lsd_client_start +
1039 idx * tgt->lut_lsd.lsd_client_size;
1041 LASSERTF(ted->ted_lr_off > 0, "ted_lr_off = %llu\n", ted->ted_lr_off);
1043 if (tgt_is_multimodrpcs_client(exp)) {
1044 /* Set MULTI RPCS incompatibility flag to prevent previous
1045 * Lustre versions to mount a target with reply_data file */
1046 atomic_inc(&tgt->lut_num_clients);
1047 if (!(tgt->lut_lsd.lsd_feature_incompat &
1048 OBD_INCOMPAT_MULTI_RPCS)) {
1049 tgt->lut_lsd.lsd_feature_incompat |=
1050 OBD_INCOMPAT_MULTI_RPCS;
1051 rc = tgt_server_data_update(env, tgt, 1);
1053 CERROR("%s: unable to set MULTI RPCS "
1054 "incompatibility flag\n",
1055 exp->exp_obd->obd_name);
1060 /* assign client slot generation */
1061 ted->ted_lcd->lcd_generation =
1062 atomic_inc_return(&tgt->lut_client_generation);
1064 ted->ted_lcd->lcd_generation = 0;
1067 CDEBUG(D_INFO, "%s: new client at index %d (%llu) with UUID '%s' "
1069 tgt->lut_obd->obd_name, ted->ted_lr_idx, ted->ted_lr_off,
1070 ted->ted_lcd->lcd_uuid, ted->ted_lcd->lcd_generation);
1072 if (OBD_FAIL_CHECK(OBD_FAIL_TGT_CLIENT_ADD))
1075 rc = tgt_client_data_update(env, exp);
1077 CERROR("%s: Failed to write client lcd at idx %d, rc %d\n",
1078 tgt->lut_obd->obd_name, idx, rc);
1082 EXPORT_SYMBOL(tgt_client_new);
1084 /* Add an existing client to the MDS in-memory state based on
1085 * a client that was previously found in the last_rcvd file and
1086 * already has an assigned slot (idx >= 0).
1088 * It should not be possible to fail adding an existing client - otherwise
1089 * mdt_init_server_data() callsite needs to be fixed.
1091 int tgt_client_add(const struct lu_env *env, struct obd_export *exp, int idx)
1093 struct tg_export_data *ted = &exp->exp_target_data;
1094 struct lu_target *tgt = class_exp2tgt(exp);
1098 LASSERT(tgt && tgt->lut_client_bitmap != NULL);
1099 LASSERTF(idx >= 0, "%d\n", idx);
1101 if (!strcmp(ted->ted_lcd->lcd_uuid, tgt->lut_obd->obd_uuid.uuid) ||
1102 exp_connect_flags(exp) & OBD_CONNECT_LIGHTWEIGHT)
1105 if (test_and_set_bit(idx, tgt->lut_client_bitmap)) {
1106 CERROR("%s: client %d: bit already set in bitmap!!\n",
1107 tgt->lut_obd->obd_name, idx);
1110 atomic_inc(&tgt->lut_num_clients);
1112 CDEBUG(D_INFO, "%s: client at idx %d with UUID '%s' added, "
1114 tgt->lut_obd->obd_name, idx, ted->ted_lcd->lcd_uuid,
1115 ted->ted_lcd->lcd_generation);
1117 ted->ted_lr_idx = idx;
1118 ted->ted_lr_off = tgt->lut_lsd.lsd_client_start +
1119 idx * tgt->lut_lsd.lsd_client_size;
1121 mutex_init(&ted->ted_lcd_lock);
1123 LASSERTF(ted->ted_lr_off > 0, "ted_lr_off = %llu\n", ted->ted_lr_off);
1128 int tgt_client_del(const struct lu_env *env, struct obd_export *exp)
1130 struct tg_export_data *ted = &exp->exp_target_data;
1131 struct lu_target *tgt = class_exp2tgt(exp);
1136 LASSERT(ted->ted_lcd);
1138 if (unlikely(tgt == NULL)) {
1139 CDEBUG(D_ERROR, "%s: No target for connected export\n",
1140 class_exp2obd(exp)->obd_name);
1144 /* XXX if lcd_uuid were a real obd_uuid, I could use obd_uuid_equals */
1145 if (!strcmp((char *)ted->ted_lcd->lcd_uuid,
1146 (char *)tgt->lut_obd->obd_uuid.uuid) ||
1147 exp_connect_flags(exp) & OBD_CONNECT_LIGHTWEIGHT ||
1148 exp->exp_no_recovery)
1151 /* Slot may be not yet assigned, use case is race between Client
1152 * reconnect and forced eviction */
1153 if (ted->ted_lr_idx < 0) {
1154 CWARN("%s: client with UUID '%s' not in bitmap\n",
1155 tgt->lut_obd->obd_name, ted->ted_lcd->lcd_uuid);
1159 CDEBUG(D_INFO, "%s: del client at idx %u, off %lld, UUID '%s'\n",
1160 tgt->lut_obd->obd_name, ted->ted_lr_idx, ted->ted_lr_off,
1161 ted->ted_lcd->lcd_uuid);
1163 /* Clear the bit _after_ zeroing out the client so we don't
1164 race with filter_client_add and zero out new clients.*/
1165 if (!test_bit(ted->ted_lr_idx, tgt->lut_client_bitmap)) {
1166 CERROR("%s: client %u: bit already clear in bitmap!!\n",
1167 tgt->lut_obd->obd_name, ted->ted_lr_idx);
1171 /* Do not erase record for recoverable client. */
1172 if (exp->exp_flags & OBD_OPT_FAILOVER)
1175 if (OBD_FAIL_CHECK(OBD_FAIL_TGT_CLIENT_DEL))
1178 /* Make sure the server's last_transno is up to date.
1179 * This should be done before zeroing client slot so last_transno will
1180 * be in server data or in client data in case of failure */
1181 rc = tgt_server_data_update(env, tgt, 0);
1183 CERROR("%s: failed to update server data, skip client %s "
1184 "zeroing, rc %d\n", tgt->lut_obd->obd_name,
1185 ted->ted_lcd->lcd_uuid, rc);
1189 memset(ted->ted_lcd->lcd_uuid, 0, sizeof ted->ted_lcd->lcd_uuid);
1190 rc = tgt_client_data_update(env, exp);
1192 CDEBUG(rc == 0 ? D_INFO : D_ERROR,
1193 "%s: zeroing out client %s at idx %u (%llu), rc %d\n",
1194 tgt->lut_obd->obd_name, ted->ted_lcd->lcd_uuid,
1195 ted->ted_lr_idx, ted->ted_lr_off, rc);
1198 EXPORT_SYMBOL(tgt_client_del);
1200 static void tgt_clean_by_tag(struct obd_export *exp, __u64 xid, __u16 tag)
1202 struct tg_export_data *ted = &exp->exp_target_data;
1203 struct lu_target *lut = class_exp2tgt(exp);
1204 struct tg_reply_data *trd, *tmp;
1209 list_for_each_entry_safe(trd, tmp, &ted->ted_reply_list, trd_list) {
1210 if (trd->trd_tag != tag)
1213 LASSERT(ergo(tgt_is_increasing_xid_client(exp),
1214 trd->trd_reply.lrd_xid <= xid));
1216 ted->ted_release_tag++;
1217 tgt_release_reply_data(lut, ted, trd);
1221 static int tgt_add_reply_data(const struct lu_env *env, struct lu_target *tgt,
1222 struct tg_export_data *ted, struct tg_reply_data *trd,
1223 struct ptlrpc_request *req,
1224 struct thandle *th, bool update_lrd_file)
1226 struct lsd_reply_data *lrd;
1230 lrd = &trd->trd_reply;
1231 /* update export last transno */
1232 mutex_lock(&ted->ted_lcd_lock);
1233 if (lrd->lrd_transno > ted->ted_lcd->lcd_last_transno)
1234 ted->ted_lcd->lcd_last_transno = lrd->lrd_transno;
1235 mutex_unlock(&ted->ted_lcd_lock);
1238 /* find a empty slot */
1239 i = tgt_find_free_reply_slot(tgt);
1240 if (unlikely(i < 0)) {
1241 CERROR("%s: couldn't find a slot for reply data: "
1242 "rc = %d\n", tgt_name(tgt), i);
1247 if (update_lrd_file) {
1250 /* write reply data to disk */
1251 off = sizeof(struct lsd_reply_header) + sizeof(*lrd) * i;
1252 rc = tgt_reply_data_write(env, tgt, lrd, off, th);
1253 if (unlikely(rc != 0)) {
1254 CERROR("%s: can't update %s file: rc = %d\n",
1255 tgt_name(tgt), REPLY_DATA, rc);
1256 GOTO(free_slot, rc);
1260 trd->trd_index = TRD_INDEX_MEMORY;
1263 /* add reply data to target export's reply list */
1264 mutex_lock(&ted->ted_lcd_lock);
1266 int exclude = tgt_is_increasing_xid_client(req->rq_export) ?
1267 MSG_REPLAY : MSG_REPLAY|MSG_RESENT;
1269 if (req->rq_obsolete) {
1271 "drop reply data update for obsolete req xid=%llu,"
1272 "transno=%llu, tag=%hu\n", req->rq_xid,
1273 lrd->lrd_transno, trd->trd_tag);
1274 mutex_unlock(&ted->ted_lcd_lock);
1275 GOTO(free_slot, rc = -EBADR);
1278 if (!(lustre_msg_get_flags(req->rq_reqmsg) & exclude))
1279 tgt_clean_by_tag(req->rq_export, req->rq_xid,
1282 list_add(&trd->trd_list, &ted->ted_reply_list);
1283 ted->ted_reply_cnt++;
1284 if (ted->ted_reply_cnt > ted->ted_reply_max)
1285 ted->ted_reply_max = ted->ted_reply_cnt;
1286 mutex_unlock(&ted->ted_lcd_lock);
1288 CDEBUG(D_TRACE, "add reply %p: xid %llu, transno %llu, "
1289 "tag %hu, client gen %u, slot idx %d\n",
1290 trd, lrd->lrd_xid, lrd->lrd_transno,
1291 trd->trd_tag, lrd->lrd_client_gen, trd->trd_index);
1297 tgt_clear_reply_slot(tgt, trd->trd_index);
1301 int tgt_mk_reply_data(const struct lu_env *env,
1302 struct lu_target *tgt,
1303 struct tg_export_data *ted,
1304 struct ptlrpc_request *req,
1310 struct tg_reply_data *trd;
1311 struct lsd_reply_data *lrd;
1312 __u64 *pre_versions = NULL;
1314 struct tgt_session_info *tsi = NULL;
1317 if (unlikely(trd == NULL))
1321 tsi = tgt_ses_info(env);
1323 /* fill reply data information */
1324 lrd = &trd->trd_reply;
1325 lrd->lrd_transno = transno;
1327 lrd->lrd_xid = req->rq_xid;
1328 trd->trd_tag = lustre_msg_get_tag(req->rq_reqmsg);
1329 lrd->lrd_client_gen = ted->ted_lcd->lcd_generation;
1331 pre_versions = lustre_msg_get_versions(req->rq_repmsg);
1332 lrd->lrd_result = th->th_result;
1335 LASSERT(env != NULL);
1336 LASSERT(tsi->tsi_xid != 0);
1338 lrd->lrd_xid = tsi->tsi_xid;
1339 lrd->lrd_result = tsi->tsi_result;
1340 lrd->lrd_client_gen = tsi->tsi_client_gen;
1343 lrd->lrd_data = opdata;
1345 trd->trd_pre_versions[0] = pre_versions[0];
1346 trd->trd_pre_versions[1] = pre_versions[1];
1347 trd->trd_pre_versions[2] = pre_versions[2];
1348 trd->trd_pre_versions[3] = pre_versions[3];
1351 if (tsi && tsi->tsi_open_obj)
1352 trd->trd_object = *lu_object_fid(&tsi->tsi_open_obj->do_lu);
1354 rc = tgt_add_reply_data(env, tgt, ted, trd, req,
1364 EXPORT_SYMBOL(tgt_mk_reply_data);
1367 * last_rcvd & last_committed update callbacks
1369 static int tgt_last_rcvd_update(const struct lu_env *env, struct lu_target *tgt,
1370 struct dt_object *obj, __u64 opdata,
1371 struct thandle *th, struct ptlrpc_request *req)
1373 struct tgt_thread_info *tti = tgt_th_info(env);
1374 struct tgt_session_info *tsi = tgt_ses_info(env);
1375 struct obd_export *exp = tsi->tsi_exp;
1376 struct tg_export_data *ted;
1384 LASSERT(exp != NULL);
1385 ted = &exp->exp_target_data;
1387 /* Some clients don't support recovery, and they don't have last_rcvd
1389 * 1. lightweight clients.
1390 * 2. local clients on MDS which doesn't enable "localrecov".
1391 * 3. OFD connect may cause transaction before export has last_rcvd
1394 if (ted->ted_lr_idx < 0)
1398 tti->tti_transno = lustre_msg_get_transno(req->rq_reqmsg);
1400 /* From update replay, tti_transno should be set already */
1401 LASSERT(tti->tti_transno != 0);
1403 spin_lock(&tgt->lut_translock);
1404 if (th->th_result != 0) {
1405 if (tti->tti_transno != 0) {
1406 CERROR("%s: replay transno %llu failed: rc = %d\n",
1407 tgt_name(tgt), tti->tti_transno, th->th_result);
1409 } else if (tti->tti_transno == 0) {
1410 tti->tti_transno = ++tgt->lut_last_transno;
1412 /* should be replay */
1413 if (tti->tti_transno > tgt->lut_last_transno)
1414 tgt->lut_last_transno = tti->tti_transno;
1416 spin_unlock(&tgt->lut_translock);
1418 /** VBR: set new versions */
1419 if (th->th_result == 0 && obj != NULL) {
1420 struct dt_object *dto = dt_object_locate(obj, th->th_dev);
1421 dt_version_set(env, dto, tti->tti_transno, th);
1424 /* filling reply data */
1425 CDEBUG(D_INODE, "transno = %llu, last_committed = %llu\n",
1426 tti->tti_transno, tgt->lut_obd->obd_last_committed);
1429 req->rq_transno = tti->tti_transno;
1430 lustre_msg_set_transno(req->rq_repmsg, tti->tti_transno);
1433 /* if can't add callback, do sync write */
1434 th->th_sync |= !!tgt_last_commit_cb_add(th, tgt, exp, tti->tti_transno);
1437 /* store transno in the last_rcvd header */
1438 spin_lock(&tgt->lut_translock);
1439 if (tti->tti_transno > tgt->lut_lsd.lsd_last_transno) {
1440 tgt->lut_lsd.lsd_last_transno = tti->tti_transno;
1441 spin_unlock(&tgt->lut_translock);
1442 /* Although current connection doesn't have slot
1443 * in the last_rcvd, we still want to maintain
1444 * the in-memory lsd_client_data structure in order to
1445 * properly handle reply reconstruction. */
1446 rc = tgt_server_data_write(env, tgt, th);
1448 spin_unlock(&tgt->lut_translock);
1450 } else if (ted->ted_lr_off == 0) {
1451 CERROR("%s: client idx %d has offset %lld\n",
1452 tgt_name(tgt), ted->ted_lr_idx, ted->ted_lr_off);
1456 /* Target that supports multiple reply data */
1457 if (tgt_is_multimodrpcs_client(exp)) {
1458 return tgt_mk_reply_data(env, tgt, ted, req, opdata, th,
1459 !!(req != NULL), tti->tti_transno);
1462 /* Enough for update replay, let's return */
1466 mutex_lock(&ted->ted_lcd_lock);
1467 LASSERT(ergo(tti->tti_transno == 0, th->th_result != 0));
1468 if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE) {
1469 transno_p = &ted->ted_lcd->lcd_last_close_transno;
1470 ted->ted_lcd->lcd_last_close_xid = req->rq_xid;
1471 ted->ted_lcd->lcd_last_close_result = th->th_result;
1473 /* VBR: save versions in last_rcvd for reconstruct. */
1474 __u64 *pre_versions = lustre_msg_get_versions(req->rq_repmsg);
1477 ted->ted_lcd->lcd_pre_versions[0] = pre_versions[0];
1478 ted->ted_lcd->lcd_pre_versions[1] = pre_versions[1];
1479 ted->ted_lcd->lcd_pre_versions[2] = pre_versions[2];
1480 ted->ted_lcd->lcd_pre_versions[3] = pre_versions[3];
1482 transno_p = &ted->ted_lcd->lcd_last_transno;
1483 ted->ted_lcd->lcd_last_xid = req->rq_xid;
1484 ted->ted_lcd->lcd_last_result = th->th_result;
1485 /* XXX: lcd_last_data is __u32 but intent_dispostion is __u64,
1486 * see struct ldlm_reply->lock_policy_res1; */
1487 ted->ted_lcd->lcd_last_data = opdata;
1490 /* Update transno in slot only if non-zero number, i.e. no errors */
1491 if (likely(tti->tti_transno != 0)) {
1492 /* Don't overwrite bigger transaction number with lower one.
1493 * That is not sign of problem in all cases, but in any case
1494 * this value should be monotonically increased only. */
1495 if (*transno_p > tti->tti_transno) {
1496 if (!tgt->lut_no_reconstruct) {
1497 CERROR("%s: trying to overwrite bigger transno:"
1498 "on-disk: %llu, new: %llu replay: "
1499 "%d. See LU-617.\n", tgt_name(tgt),
1500 *transno_p, tti->tti_transno,
1501 req_is_replay(req));
1502 if (req_is_replay(req)) {
1503 spin_lock(&req->rq_export->exp_lock);
1504 req->rq_export->exp_vbr_failed = 1;
1505 spin_unlock(&req->rq_export->exp_lock);
1507 mutex_unlock(&ted->ted_lcd_lock);
1508 RETURN(req_is_replay(req) ? -EOVERFLOW : 0);
1511 *transno_p = tti->tti_transno;
1516 tti->tti_off = ted->ted_lr_off;
1517 if (CFS_FAIL_CHECK(OBD_FAIL_TGT_RCVD_EIO))
1520 rc = tgt_client_data_write(env, tgt, ted->ted_lcd,
1523 mutex_unlock(&ted->ted_lcd_lock);
1527 mutex_unlock(&ted->ted_lcd_lock);
1532 * last_rcvd update for echo client simulation.
1533 * It updates last_rcvd client slot and version of object in
1534 * simple way but with all locks to simulate all drawbacks
1536 static int tgt_last_rcvd_update_echo(const struct lu_env *env,
1537 struct lu_target *tgt,
1538 struct dt_object *obj,
1540 struct obd_export *exp)
1542 struct tgt_thread_info *tti = tgt_th_info(env);
1543 struct tg_export_data *ted = &exp->exp_target_data;
1548 tti->tti_transno = 0;
1550 spin_lock(&tgt->lut_translock);
1551 if (th->th_result == 0)
1552 tti->tti_transno = ++tgt->lut_last_transno;
1553 spin_unlock(&tgt->lut_translock);
1555 /** VBR: set new versions */
1556 if (th->th_result == 0 && obj != NULL)
1557 dt_version_set(env, obj, tti->tti_transno, th);
1559 /* if can't add callback, do sync write */
1560 th->th_sync |= !!tgt_last_commit_cb_add(th, tgt, exp,
1563 LASSERT(ted->ted_lr_off > 0);
1565 mutex_lock(&ted->ted_lcd_lock);
1566 LASSERT(ergo(tti->tti_transno == 0, th->th_result != 0));
1567 ted->ted_lcd->lcd_last_transno = tti->tti_transno;
1568 ted->ted_lcd->lcd_last_result = th->th_result;
1570 tti->tti_off = ted->ted_lr_off;
1571 rc = tgt_client_data_write(env, tgt, ted->ted_lcd, &tti->tti_off, th);
1572 mutex_unlock(&ted->ted_lcd_lock);
1576 static int tgt_clients_data_init(const struct lu_env *env,
1577 struct lu_target *tgt,
1578 unsigned long last_size)
1580 struct obd_device *obd = tgt->lut_obd;
1581 struct lr_server_data *lsd = &tgt->lut_lsd;
1582 struct lsd_client_data *lcd = NULL;
1583 struct tg_export_data *ted;
1586 loff_t off = lsd->lsd_client_start;
1587 __u32 generation = 0;
1588 struct cfs_hash *hash = NULL;
1592 if (tgt->lut_bottom->dd_rdonly)
1595 BUILD_BUG_ON(offsetof(struct lsd_client_data, lcd_padding) +
1596 sizeof(lcd->lcd_padding) != LR_CLIENT_SIZE);
1602 hash = cfs_hash_getref(tgt->lut_obd->obd_gen_hash);
1604 GOTO(err_out, rc = -ENODEV);
1606 for (cl_idx = 0; off < last_size; cl_idx++) {
1607 struct obd_export *exp;
1610 /* Don't assume off is incremented properly by
1611 * read_record(), in case sizeof(*lcd)
1612 * isn't the same as fsd->lsd_client_size. */
1613 off = lsd->lsd_client_start + cl_idx * lsd->lsd_client_size;
1614 rc = tgt_client_data_read(env, tgt, lcd, &off, cl_idx);
1616 CERROR("%s: error reading last_rcvd %s idx %d off "
1617 "%llu: rc = %d\n", tgt_name(tgt), LAST_RCVD,
1620 break; /* read error shouldn't cause startup to fail */
1623 if (lcd->lcd_uuid[0] == '\0') {
1624 CDEBUG(D_INFO, "skipping zeroed client at offset %d\n",
1629 last_transno = lcd_last_transno(lcd);
1631 /* These exports are cleaned up by disconnect, so they
1632 * need to be set up like real exports as connect does.
1634 CDEBUG(D_HA, "RCVRNG CLIENT uuid: %s idx: %d lr: %llu"
1635 " srv lr: %llu lx: %llu gen %u\n", lcd->lcd_uuid,
1636 cl_idx, last_transno, lsd->lsd_last_transno,
1637 lcd_last_xid(lcd), lcd->lcd_generation);
1639 exp = class_new_export(obd, (struct obd_uuid *)lcd->lcd_uuid);
1641 if (PTR_ERR(exp) == -EALREADY) {
1642 /* export already exists, zero out this one */
1643 CERROR("%s: Duplicate export %s!\n",
1644 tgt_name(tgt), lcd->lcd_uuid);
1647 GOTO(err_out, rc = PTR_ERR(exp));
1650 ted = &exp->exp_target_data;
1651 *ted->ted_lcd = *lcd;
1653 rc = tgt_client_add(env, exp, cl_idx);
1654 LASSERTF(rc == 0, "rc = %d\n", rc); /* can't fail existing */
1655 /* VBR: set export last committed version */
1656 exp->exp_last_committed = last_transno;
1657 spin_lock(&exp->exp_lock);
1658 exp->exp_connecting = 0;
1659 exp->exp_in_recovery = 0;
1660 spin_unlock(&exp->exp_lock);
1661 atomic_inc(&obd->obd_max_recoverable_clients);
1663 if (tgt->lut_lsd.lsd_feature_incompat &
1664 OBD_INCOMPAT_MULTI_RPCS &&
1665 lcd->lcd_generation != 0) {
1666 /* compute the highest valid client generation */
1667 generation = max(generation, lcd->lcd_generation);
1668 /* fill client_generation <-> export hash table */
1669 rc = cfs_hash_add_unique(hash, &lcd->lcd_generation,
1670 &exp->exp_gen_hash);
1672 CERROR("%s: duplicate export for client "
1674 tgt_name(tgt), lcd->lcd_generation);
1675 class_export_put(exp);
1680 class_export_put(exp);
1682 rc = rev_import_init(exp);
1684 class_unlink_export(exp);
1688 /* Need to check last_rcvd even for duplicated exports. */
1689 CDEBUG(D_OTHER, "client at idx %d has last_transno = %llu\n",
1690 cl_idx, last_transno);
1692 spin_lock(&tgt->lut_translock);
1693 tgt->lut_last_transno = max(last_transno,
1694 tgt->lut_last_transno);
1695 spin_unlock(&tgt->lut_translock);
1698 /* record highest valid client generation */
1699 atomic_set(&tgt->lut_client_generation, generation);
1703 cfs_hash_putref(hash);
1708 struct server_compat_data {
1715 static struct server_compat_data tgt_scd[] = {
1716 [LDD_F_SV_TYPE_MDT] = {
1717 .rocompat = OBD_ROCOMPAT_LOVOBJID,
1718 .incompat = OBD_INCOMPAT_MDT | OBD_INCOMPAT_COMMON_LR |
1719 OBD_INCOMPAT_FID | OBD_INCOMPAT_IAM_DIR |
1720 OBD_INCOMPAT_LMM_VER | OBD_INCOMPAT_MULTI_OI |
1721 OBD_INCOMPAT_MULTI_RPCS,
1722 .rocinit = OBD_ROCOMPAT_LOVOBJID,
1723 .incinit = OBD_INCOMPAT_MDT | OBD_INCOMPAT_COMMON_LR |
1724 OBD_INCOMPAT_MULTI_OI,
1726 [LDD_F_SV_TYPE_OST] = {
1727 .rocompat = OBD_ROCOMPAT_IDX_IN_IDIF,
1728 .incompat = OBD_INCOMPAT_OST | OBD_INCOMPAT_COMMON_LR |
1730 .rocinit = OBD_ROCOMPAT_IDX_IN_IDIF,
1731 .incinit = OBD_INCOMPAT_OST | OBD_INCOMPAT_COMMON_LR,
1735 int tgt_server_data_init(const struct lu_env *env, struct lu_target *tgt)
1737 struct tgt_thread_info *tti = tgt_th_info(env);
1738 struct lr_server_data *lsd = &tgt->lut_lsd;
1739 unsigned long last_rcvd_size;
1743 rc = dt_attr_get(env, tgt->lut_last_rcvd, &tti->tti_attr);
1747 last_rcvd_size = (unsigned long)tti->tti_attr.la_size;
1749 /* ensure padding in the struct is the correct size */
1750 BUILD_BUG_ON(offsetof(struct lr_server_data, lsd_padding) +
1751 sizeof(lsd->lsd_padding) != LR_SERVER_SIZE);
1753 rc = server_name2index(tgt_name(tgt), &index, NULL);
1755 CERROR("%s: Can not get index from name: rc = %d\n",
1759 /* server_name2index() returns type */
1761 if (type != LDD_F_SV_TYPE_MDT && type != LDD_F_SV_TYPE_OST) {
1762 CERROR("%s: unknown target type %x\n", tgt_name(tgt), type);
1766 /* last_rcvd on OST doesn't provide reconstruct support because there
1767 * may be up to 8 in-flight write requests per single slot in
1768 * last_rcvd client data
1770 tgt->lut_no_reconstruct = (type == LDD_F_SV_TYPE_OST);
1772 if (last_rcvd_size == 0) {
1773 LCONSOLE_WARN("%s: new disk, initializing\n", tgt_name(tgt));
1775 memcpy(lsd->lsd_uuid, tgt->lut_obd->obd_uuid.uuid,
1776 sizeof(lsd->lsd_uuid));
1777 lsd->lsd_last_transno = 0;
1778 lsd->lsd_mount_count = 0;
1779 lsd->lsd_server_size = LR_SERVER_SIZE;
1780 lsd->lsd_client_start = LR_CLIENT_START;
1781 lsd->lsd_client_size = LR_CLIENT_SIZE;
1782 lsd->lsd_subdir_count = OBJ_SUBDIR_COUNT;
1783 lsd->lsd_osd_index = index;
1784 lsd->lsd_feature_rocompat = tgt_scd[type].rocinit;
1785 lsd->lsd_feature_incompat = tgt_scd[type].incinit;
1787 rc = tgt_server_data_read(env, tgt);
1789 CERROR("%s: error reading LAST_RCVD: rc= %d\n",
1793 if (strcmp(lsd->lsd_uuid, tgt->lut_obd->obd_uuid.uuid)) {
1794 if (tgt->lut_bottom->dd_rdonly) {
1795 /* Such difference may be caused by mounting
1796 * up snapshot with new fsname under rd_only
1797 * mode. But even if it was NOT, it will not
1798 * damage the system because of "rd_only". */
1799 memcpy(lsd->lsd_uuid,
1800 tgt->lut_obd->obd_uuid.uuid,
1801 sizeof(lsd->lsd_uuid));
1803 LCONSOLE_ERROR_MSG(0x157, "Trying to start "
1804 "OBD %s using the wrong "
1805 "disk %s. Were the /dev/ "
1806 "assignments rearranged?\n",
1807 tgt->lut_obd->obd_uuid.uuid,
1813 if (lsd->lsd_osd_index != index) {
1814 LCONSOLE_ERROR_MSG(0x157,
1815 "%s: index %d in last rcvd is different with the index %d in config log, It might be disk corruption!\n",
1817 lsd->lsd_osd_index, index);
1822 if (lsd->lsd_feature_incompat & ~tgt_scd[type].incompat) {
1823 CERROR("%s: unsupported incompat filesystem feature(s) %x\n",
1825 lsd->lsd_feature_incompat & ~tgt_scd[type].incompat);
1829 if (type == LDD_F_SV_TYPE_MDT)
1830 lsd->lsd_feature_incompat |= OBD_INCOMPAT_FID;
1832 if (lsd->lsd_feature_rocompat & ~tgt_scd[type].rocompat) {
1833 CERROR("%s: unsupported read-only filesystem feature(s) %x\n",
1835 lsd->lsd_feature_rocompat & ~tgt_scd[type].rocompat);
1838 /** Interop: evict all clients at first boot with 1.8 last_rcvd */
1839 if (type == LDD_F_SV_TYPE_MDT &&
1840 !(lsd->lsd_feature_compat & OBD_COMPAT_20)) {
1841 if (last_rcvd_size > lsd->lsd_client_start) {
1842 LCONSOLE_WARN("%s: mounting at first time on 1.8 FS, "
1843 "remove all clients for interop needs\n",
1845 rc = tgt_truncate_last_rcvd(env, tgt,
1846 lsd->lsd_client_start);
1849 last_rcvd_size = lsd->lsd_client_start;
1851 /** set 2.0 flag to upgrade/downgrade between 1.8 and 2.0 */
1852 lsd->lsd_feature_compat |= OBD_COMPAT_20;
1855 spin_lock(&tgt->lut_translock);
1856 tgt->lut_last_transno = lsd->lsd_last_transno;
1857 spin_unlock(&tgt->lut_translock);
1859 lsd->lsd_mount_count++;
1861 CDEBUG(D_INODE, "=======,=BEGIN DUMPING LAST_RCVD========\n");
1862 CDEBUG(D_INODE, "%s: server last_transno: %llu\n",
1863 tgt_name(tgt), tgt->lut_last_transno);
1864 CDEBUG(D_INODE, "%s: server mount_count: %llu\n",
1865 tgt_name(tgt), lsd->lsd_mount_count);
1866 CDEBUG(D_INODE, "%s: server data size: %u\n",
1867 tgt_name(tgt), lsd->lsd_server_size);
1868 CDEBUG(D_INODE, "%s: per-client data start: %u\n",
1869 tgt_name(tgt), lsd->lsd_client_start);
1870 CDEBUG(D_INODE, "%s: per-client data size: %u\n",
1871 tgt_name(tgt), lsd->lsd_client_size);
1872 CDEBUG(D_INODE, "%s: last_rcvd size: %lu\n",
1873 tgt_name(tgt), last_rcvd_size);
1874 CDEBUG(D_INODE, "%s: server subdir_count: %u\n",
1875 tgt_name(tgt), lsd->lsd_subdir_count);
1876 CDEBUG(D_INODE, "%s: last_rcvd clients: %lu\n", tgt_name(tgt),
1877 last_rcvd_size <= lsd->lsd_client_start ? 0 :
1878 (last_rcvd_size - lsd->lsd_client_start) /
1879 lsd->lsd_client_size);
1880 CDEBUG(D_INODE, "========END DUMPING LAST_RCVD========\n");
1882 if (lsd->lsd_server_size == 0 || lsd->lsd_client_start == 0 ||
1883 lsd->lsd_client_size == 0) {
1884 CERROR("%s: bad last_rcvd contents!\n", tgt_name(tgt));
1888 if (!tgt->lut_obd->obd_replayable)
1889 CWARN("%s: recovery support OFF\n", tgt_name(tgt));
1891 rc = tgt_clients_data_init(env, tgt, last_rcvd_size);
1893 GOTO(err_client, rc);
1895 spin_lock(&tgt->lut_translock);
1896 /* obd_last_committed is used for compatibility
1897 * with other lustre recovery code */
1898 tgt->lut_obd->obd_last_committed = tgt->lut_last_transno;
1899 spin_unlock(&tgt->lut_translock);
1901 tgt->lut_obd->u.obt.obt_mount_count = lsd->lsd_mount_count;
1902 tgt->lut_obd->u.obt.obt_instance = (__u32)lsd->lsd_mount_count;
1904 /* save it, so mount count and last_transno is current */
1905 rc = tgt_server_data_update(env, tgt, 0);
1907 GOTO(err_client, rc);
1912 class_disconnect_exports(tgt->lut_obd);
1916 /* add credits for last_rcvd update */
1917 int tgt_txn_start_cb(const struct lu_env *env, struct thandle *th,
1920 struct lu_target *tgt = cookie;
1921 struct tgt_session_info *tsi;
1922 struct tgt_thread_info *tti = tgt_th_info(env);
1923 struct dt_object *dto;
1926 /* For readonly case, the caller should have got failure
1927 * when start the transaction. If the logic comes here,
1928 * there must be something wrong. */
1929 if (unlikely(tgt->lut_bottom->dd_rdonly)) {
1934 /* if there is no session, then this transaction is not result of
1935 * request processing but some local operation */
1936 if (env->le_ses == NULL)
1939 LASSERT(tgt->lut_last_rcvd);
1940 tsi = tgt_ses_info(env);
1941 /* OFD may start transaction without export assigned */
1942 if (tsi->tsi_exp == NULL)
1945 if (tgt_is_multimodrpcs_client(tsi->tsi_exp)) {
1947 * Use maximum possible file offset for declaration to ensure
1948 * ZFS will reserve enough credits for a write anywhere in this
1949 * file, since we don't know where in the file the write will be
1950 * because a replay slot has not been assigned. This should be
1951 * replaced by dmu_tx_hold_append() when available.
1953 tti->tti_buf.lb_buf = NULL;
1954 tti->tti_buf.lb_len = sizeof(struct lsd_reply_data);
1955 dto = dt_object_locate(tgt->lut_reply_data, th->th_dev);
1956 rc = dt_declare_record_write(env, dto, &tti->tti_buf, -1, th);
1960 dto = dt_object_locate(tgt->lut_last_rcvd, th->th_dev);
1962 tti->tti_off = tsi->tsi_exp->exp_target_data.ted_lr_off;
1963 rc = dt_declare_record_write(env, dto, &tti->tti_buf,
1969 if (tsi->tsi_vbr_obj != NULL &&
1970 !lu_object_remote(&tsi->tsi_vbr_obj->do_lu)) {
1971 dto = dt_object_locate(tsi->tsi_vbr_obj, th->th_dev);
1972 rc = dt_declare_version_set(env, dto, th);
1978 /* Update last_rcvd records with latests transaction data */
1979 int tgt_txn_stop_cb(const struct lu_env *env, struct thandle *th,
1982 struct lu_target *tgt = cookie;
1983 struct tgt_session_info *tsi;
1984 struct tgt_thread_info *tti = tgt_th_info(env);
1985 struct dt_object *obj = NULL;
1989 if (env->le_ses == NULL)
1992 tsi = tgt_ses_info(env);
1993 /* OFD may start transaction without export assigned */
1994 if (tsi->tsi_exp == NULL)
1997 echo_client = (tgt_ses_req(tsi) == NULL && tsi->tsi_xid == 0);
1999 if (tti->tti_has_trans && !echo_client) {
2000 if (tti->tti_mult_trans == 0) {
2001 CDEBUG(D_HA, "More than one transaction %llu\n",
2005 /* we need another transno to be assigned */
2006 tti->tti_transno = 0;
2007 } else if (th->th_result == 0) {
2008 tti->tti_has_trans = 1;
2011 if (tsi->tsi_vbr_obj != NULL &&
2012 !lu_object_remote(&tsi->tsi_vbr_obj->do_lu)) {
2013 obj = tsi->tsi_vbr_obj;
2016 if (unlikely(echo_client)) /* echo client special case */
2017 rc = tgt_last_rcvd_update_echo(env, tgt, obj, th,
2020 rc = tgt_last_rcvd_update(env, tgt, obj, tsi->tsi_opdata, th,
2025 int tgt_reply_data_init(const struct lu_env *env, struct lu_target *tgt)
2027 struct tgt_thread_info *tti = tgt_th_info(env);
2028 struct lsd_reply_data *lrd = &tti->tti_lrd;
2029 unsigned long reply_data_size;
2031 struct lsd_reply_header *lrh = NULL;
2032 struct tg_reply_data *trd = NULL;
2035 struct cfs_hash *hash = NULL;
2036 struct obd_export *exp;
2037 struct tg_export_data *ted;
2038 int reply_data_recovered = 0;
2040 rc = dt_attr_get(env, tgt->lut_reply_data, &tti->tti_attr);
2043 reply_data_size = (unsigned long)tti->tti_attr.la_size;
2047 GOTO(out, rc = -ENOMEM);
2049 if (reply_data_size == 0) {
2050 CDEBUG(D_INFO, "%s: new reply_data file, initializing\n",
2052 lrh->lrh_magic = LRH_MAGIC;
2053 lrh->lrh_header_size = sizeof(struct lsd_reply_header);
2054 lrh->lrh_reply_size = sizeof(struct lsd_reply_data);
2055 rc = tgt_reply_header_write(env, tgt, lrh);
2057 CERROR("%s: error writing %s: rc = %d\n",
2058 tgt_name(tgt), REPLY_DATA, rc);
2062 rc = tgt_reply_header_read(env, tgt, lrh);
2064 CERROR("%s: error reading %s: rc = %d\n",
2065 tgt_name(tgt), REPLY_DATA, rc);
2068 if (lrh->lrh_magic != LRH_MAGIC ||
2069 lrh->lrh_header_size != sizeof(struct lsd_reply_header) ||
2070 lrh->lrh_reply_size != sizeof(struct lsd_reply_data)) {
2071 CERROR("%s: invalid header in %s\n",
2072 tgt_name(tgt), REPLY_DATA);
2073 GOTO(out, rc = -EINVAL);
2076 hash = cfs_hash_getref(tgt->lut_obd->obd_gen_hash);
2078 GOTO(out, rc = -ENODEV);
2082 GOTO(out, rc = -ENOMEM);
2084 /* Load reply_data from disk */
2085 for (idx = 0, off = sizeof(struct lsd_reply_header);
2086 off < reply_data_size;
2087 idx++, off += sizeof(struct lsd_reply_data)) {
2088 rc = tgt_reply_data_read(env, tgt, lrd, off);
2090 CERROR("%s: error reading %s: rc = %d\n",
2091 tgt_name(tgt), REPLY_DATA, rc);
2095 exp = cfs_hash_lookup(hash, &lrd->lrd_client_gen);
2097 /* old reply data from a disconnected client */
2100 ted = &exp->exp_target_data;
2101 mutex_lock(&ted->ted_lcd_lock);
2103 /* create in-memory reply_data and link it to
2104 * target export's reply list */
2105 rc = tgt_set_reply_slot(tgt, idx);
2107 mutex_unlock(&ted->ted_lcd_lock);
2110 trd->trd_reply = *lrd;
2111 trd->trd_pre_versions[0] = 0;
2112 trd->trd_pre_versions[1] = 0;
2113 trd->trd_pre_versions[2] = 0;
2114 trd->trd_pre_versions[3] = 0;
2115 trd->trd_index = idx;
2117 fid_zero(&trd->trd_object);
2118 list_add(&trd->trd_list, &ted->ted_reply_list);
2119 ted->ted_reply_cnt++;
2120 if (ted->ted_reply_cnt > ted->ted_reply_max)
2121 ted->ted_reply_max = ted->ted_reply_cnt;
2123 CDEBUG(D_HA, "%s: restore reply %p: xid %llu, "
2124 "transno %llu, client gen %u, slot idx %d\n",
2125 tgt_name(tgt), trd, lrd->lrd_xid,
2126 lrd->lrd_transno, lrd->lrd_client_gen,
2129 /* update export last committed transation */
2130 exp->exp_last_committed = max(exp->exp_last_committed,
2132 /* Update lcd_last_transno as well for check in
2133 * tgt_release_reply_data() or the latest client
2134 * transno can be lost.
2136 ted->ted_lcd->lcd_last_transno =
2137 max(ted->ted_lcd->lcd_last_transno,
2138 exp->exp_last_committed);
2140 mutex_unlock(&ted->ted_lcd_lock);
2141 class_export_put(exp);
2143 /* update target last committed transaction */
2144 spin_lock(&tgt->lut_translock);
2145 tgt->lut_last_transno = max(tgt->lut_last_transno,
2147 spin_unlock(&tgt->lut_translock);
2149 reply_data_recovered++;
2153 GOTO(out, rc = -ENOMEM);
2155 CDEBUG(D_INFO, "%s: %d reply data have been recovered\n",
2156 tgt_name(tgt), reply_data_recovered);
2159 spin_lock(&tgt->lut_translock);
2160 /* obd_last_committed is used for compatibility
2161 * with other lustre recovery code */
2162 tgt->lut_obd->obd_last_committed = tgt->lut_last_transno;
2163 spin_unlock(&tgt->lut_translock);
2169 cfs_hash_putref(hash);
2177 static int tgt_check_lookup_req(struct ptlrpc_request *req, int lookup,
2178 struct tg_reply_data *trd)
2180 struct tg_export_data *ted = &req->rq_export->exp_target_data;
2181 struct lu_target *lut = class_exp2tgt(req->rq_export);
2182 __u16 tag = lustre_msg_get_tag(req->rq_reqmsg);
2184 struct tg_reply_data *reply;
2185 bool check_increasing;
2190 check_increasing = tgt_is_increasing_xid_client(req->rq_export) &&
2191 !(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY);
2192 if (!lookup && !check_increasing)
2195 list_for_each_entry(reply, &ted->ted_reply_list, trd_list) {
2196 if (lookup && reply->trd_reply.lrd_xid == req->rq_xid) {
2201 } else if (check_increasing && reply->trd_tag == tag &&
2202 reply->trd_reply.lrd_xid > req->rq_xid) {
2204 CERROR("%s: busy tag=%u req_xid=%llu, trd=%p: xid=%llu transno=%llu client_gen=%u slot_idx=%d: rc = %d\n",
2205 tgt_name(lut), tag, req->rq_xid, trd,
2206 reply->trd_reply.lrd_xid,
2207 reply->trd_reply.lrd_transno,
2208 reply->trd_reply.lrd_client_gen,
2209 reply->trd_index, rc);
2217 /* Look for a reply data matching specified request @req
2218 * A copy is returned in @trd if the pointer is not NULL
2220 int tgt_lookup_reply(struct ptlrpc_request *req, struct tg_reply_data *trd)
2222 struct tg_export_data *ted = &req->rq_export->exp_target_data;
2224 bool not_replay = !(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY);
2226 mutex_lock(&ted->ted_lcd_lock);
2227 if (not_replay && req->rq_xid <= req->rq_export->exp_last_xid) {
2228 /* A check for the last_xid is needed here in case there is
2229 * no reply data is left in the list. It may happen if another
2230 * RPC on another slot increased the last_xid between our
2231 * process_req_last_xid & tgt_lookup_reply calls */
2234 found = tgt_check_lookup_req(req, 1, trd);
2236 mutex_unlock(&ted->ted_lcd_lock);
2238 CDEBUG(D_TRACE, "%s: lookup reply xid %llu, found %d last_xid %llu\n",
2239 tgt_name(class_exp2tgt(req->rq_export)), req->rq_xid, found,
2240 req->rq_export->exp_last_xid);
2244 EXPORT_SYMBOL(tgt_lookup_reply);
2246 int tgt_handle_received_xid(struct obd_export *exp, __u64 rcvd_xid)
2248 struct tg_export_data *ted = &exp->exp_target_data;
2249 struct lu_target *lut = class_exp2tgt(exp);
2250 struct tg_reply_data *trd, *tmp;
2253 list_for_each_entry_safe(trd, tmp, &ted->ted_reply_list, trd_list) {
2254 if (trd->trd_reply.lrd_xid > rcvd_xid)
2256 ted->ted_release_xid++;
2257 tgt_release_reply_data(lut, ted, trd);
2263 int tgt_handle_tag(struct ptlrpc_request *req)
2265 return tgt_check_lookup_req(req, 0, NULL);