4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2012, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
34 * Message decoding, parsing and finalizing routines
37 #define DEBUG_SUBSYSTEM S_LNET
39 #include <lnet/lib-lnet.h>
42 lnet_build_unlink_event(struct lnet_libmd *md, struct lnet_event *ev)
46 memset(ev, 0, sizeof(*ev));
50 ev->type = LNET_EVENT_UNLINK;
51 lnet_md_deconstruct(md, &ev->md);
52 lnet_md2handle(&ev->md_handle, md);
57 * Don't need any lock, must be called after lnet_commit_md
60 lnet_build_msg_event(struct lnet_msg *msg, enum lnet_event_kind ev_type)
62 struct lnet_hdr *hdr = &msg->msg_hdr;
63 struct lnet_event *ev = &msg->msg_ev;
65 LASSERT(!msg->msg_routing);
68 ev->msg_type = msg->msg_type;
70 if (ev_type == LNET_EVENT_SEND) {
71 /* event for active message */
72 ev->target.nid = le64_to_cpu(hdr->dest_nid);
73 ev->target.pid = le32_to_cpu(hdr->dest_pid);
74 ev->initiator.nid = LNET_NID_ANY;
75 ev->initiator.pid = the_lnet.ln_pid;
76 ev->source.nid = LNET_NID_ANY;
77 ev->source.pid = the_lnet.ln_pid;
78 ev->sender = LNET_NID_ANY;
80 /* event for passive message */
81 ev->target.pid = hdr->dest_pid;
82 ev->target.nid = hdr->dest_nid;
83 ev->initiator.pid = hdr->src_pid;
84 /* Multi-Rail: resolve src_nid to "primary" peer NID */
85 ev->initiator.nid = msg->msg_initiator;
86 /* Multi-Rail: track source NID. */
87 ev->source.pid = hdr->src_pid;
88 ev->source.nid = hdr->src_nid;
89 ev->rlength = hdr->payload_length;
90 ev->sender = msg->msg_from;
91 ev->mlength = msg->msg_wanted;
92 ev->offset = msg->msg_offset;
99 case LNET_EVENT_PUT: /* passive PUT */
100 ev->pt_index = hdr->msg.put.ptl_index;
101 ev->match_bits = hdr->msg.put.match_bits;
102 ev->hdr_data = hdr->msg.put.hdr_data;
105 case LNET_EVENT_GET: /* passive GET */
106 ev->pt_index = hdr->msg.get.ptl_index;
107 ev->match_bits = hdr->msg.get.match_bits;
111 case LNET_EVENT_ACK: /* ACK */
112 ev->match_bits = hdr->msg.ack.match_bits;
113 ev->mlength = hdr->msg.ack.mlength;
116 case LNET_EVENT_REPLY: /* REPLY */
119 case LNET_EVENT_SEND: /* active message */
120 if (msg->msg_type == LNET_MSG_PUT) {
121 ev->pt_index = le32_to_cpu(hdr->msg.put.ptl_index);
122 ev->match_bits = le64_to_cpu(hdr->msg.put.match_bits);
123 ev->offset = le32_to_cpu(hdr->msg.put.offset);
125 ev->rlength = le32_to_cpu(hdr->payload_length);
126 ev->hdr_data = le64_to_cpu(hdr->msg.put.hdr_data);
129 LASSERT(msg->msg_type == LNET_MSG_GET);
130 ev->pt_index = le32_to_cpu(hdr->msg.get.ptl_index);
131 ev->match_bits = le64_to_cpu(hdr->msg.get.match_bits);
133 ev->rlength = le32_to_cpu(hdr->msg.get.sink_length);
134 ev->offset = le32_to_cpu(hdr->msg.get.src_offset);
142 lnet_msg_commit(struct lnet_msg *msg, int cpt)
144 struct lnet_msg_container *container = the_lnet.ln_msg_containers[cpt];
145 struct lnet_counters_common *common;
148 /* set the message deadline */
149 timeout_ns = lnet_transaction_timeout * NSEC_PER_SEC;
150 msg->msg_deadline = ktime_add_ns(ktime_get(), timeout_ns);
152 /* routed message can be committed for both receiving and sending */
153 LASSERT(!msg->msg_tx_committed);
155 if (msg->msg_sending) {
156 LASSERT(!msg->msg_receiving);
157 msg->msg_tx_cpt = cpt;
158 msg->msg_tx_committed = 1;
159 if (msg->msg_rx_committed) { /* routed message REPLY */
160 LASSERT(msg->msg_onactivelist);
164 LASSERT(!msg->msg_sending);
165 msg->msg_rx_cpt = cpt;
166 msg->msg_rx_committed = 1;
169 LASSERT(!msg->msg_onactivelist);
171 msg->msg_onactivelist = 1;
172 list_add_tail(&msg->msg_activelist, &container->msc_active);
174 common = &the_lnet.ln_counters[cpt]->lct_common;
175 common->lcc_msgs_alloc++;
176 if (common->lcc_msgs_alloc > common->lcc_msgs_max)
177 common->lcc_msgs_max = common->lcc_msgs_alloc;
181 lnet_msg_decommit_tx(struct lnet_msg *msg, int status)
183 struct lnet_counters_common *common;
184 struct lnet_event *ev = &msg->msg_ev;
186 LASSERT(msg->msg_tx_committed);
190 common = &(the_lnet.ln_counters[msg->msg_tx_cpt]->lct_common);
192 default: /* routed message */
193 LASSERT(msg->msg_routing);
194 LASSERT(msg->msg_rx_committed);
195 LASSERT(ev->type == 0);
197 common->lcc_route_length += msg->msg_len;
198 common->lcc_route_count++;
202 /* should have been decommitted */
203 LASSERT(!msg->msg_rx_committed);
204 /* overwritten while sending ACK */
205 LASSERT(msg->msg_type == LNET_MSG_ACK);
206 msg->msg_type = LNET_MSG_PUT; /* fix type */
209 case LNET_EVENT_SEND:
210 LASSERT(!msg->msg_rx_committed);
211 if (msg->msg_type == LNET_MSG_PUT)
212 common->lcc_send_length += msg->msg_len;
216 LASSERT(msg->msg_rx_committed);
217 /* overwritten while sending reply, we should never be
218 * here for optimized GET */
219 LASSERT(msg->msg_type == LNET_MSG_REPLY);
220 msg->msg_type = LNET_MSG_GET; /* fix type */
224 common->lcc_send_count++;
228 lnet_incr_stats(&msg->msg_txpeer->lpni_stats,
230 LNET_STATS_TYPE_SEND);
232 lnet_incr_stats(&msg->msg_txni->ni_stats,
234 LNET_STATS_TYPE_SEND);
236 lnet_return_tx_credits_locked(msg);
237 msg->msg_tx_committed = 0;
241 lnet_msg_decommit_rx(struct lnet_msg *msg, int status)
243 struct lnet_counters_common *common;
244 struct lnet_event *ev = &msg->msg_ev;
246 LASSERT(!msg->msg_tx_committed); /* decommitted or never committed */
247 LASSERT(msg->msg_rx_committed);
252 common = &(the_lnet.ln_counters[msg->msg_rx_cpt]->lct_common);
255 LASSERT(ev->type == 0);
256 LASSERT(msg->msg_routing);
260 LASSERT(msg->msg_type == LNET_MSG_ACK);
264 /* type is "REPLY" if it's an optimized GET on passive side,
265 * because optimized GET will never be committed for sending,
266 * so message type wouldn't be changed back to "GET" by
267 * lnet_msg_decommit_tx(), see details in lnet_parse_get() */
268 LASSERT(msg->msg_type == LNET_MSG_REPLY ||
269 msg->msg_type == LNET_MSG_GET);
270 common->lcc_send_length += msg->msg_wanted;
274 LASSERT(msg->msg_type == LNET_MSG_PUT);
277 case LNET_EVENT_REPLY:
278 /* type is "GET" if it's an optimized GET on active side,
279 * see details in lnet_create_reply_msg() */
280 LASSERT(msg->msg_type == LNET_MSG_GET ||
281 msg->msg_type == LNET_MSG_REPLY);
285 common->lcc_recv_count++;
289 lnet_incr_stats(&msg->msg_rxpeer->lpni_stats,
291 LNET_STATS_TYPE_RECV);
293 lnet_incr_stats(&msg->msg_rxni->ni_stats,
295 LNET_STATS_TYPE_RECV);
296 if (ev->type == LNET_EVENT_PUT || ev->type == LNET_EVENT_REPLY)
297 common->lcc_recv_length += msg->msg_wanted;
300 lnet_return_rx_credits_locked(msg);
301 msg->msg_rx_committed = 0;
305 lnet_msg_decommit(struct lnet_msg *msg, int cpt, int status)
309 LASSERT(msg->msg_tx_committed || msg->msg_rx_committed);
310 LASSERT(msg->msg_onactivelist);
312 if (msg->msg_tx_committed) { /* always decommit for sending first */
313 LASSERT(cpt == msg->msg_tx_cpt);
314 lnet_msg_decommit_tx(msg, status);
317 if (msg->msg_rx_committed) {
318 /* forwarding msg committed for both receiving and sending */
319 if (cpt != msg->msg_rx_cpt) {
320 lnet_net_unlock(cpt);
321 cpt2 = msg->msg_rx_cpt;
324 lnet_msg_decommit_rx(msg, status);
327 list_del(&msg->msg_activelist);
328 msg->msg_onactivelist = 0;
330 the_lnet.ln_counters[cpt2]->lct_common.lcc_msgs_alloc--;
333 lnet_net_unlock(cpt2);
339 lnet_msg_attach_md(struct lnet_msg *msg, struct lnet_libmd *md,
340 unsigned int offset, unsigned int mlen)
342 /* NB: @offset and @len are only useful for receiving */
343 /* Here, we attach the MD on lnet_msg and mark it busy and
344 * decrementing its threshold. Come what may, the lnet_msg "owns"
345 * the MD until a call to lnet_msg_detach_md or lnet_finalize()
346 * signals completion. */
347 LASSERT(!msg->msg_routing);
350 if (msg->msg_receiving) { /* committed for receiving */
351 msg->msg_offset = offset;
352 msg->msg_wanted = mlen;
356 if (md->md_threshold != LNET_MD_THRESH_INF) {
357 LASSERT(md->md_threshold > 0);
361 /* build umd in event */
362 lnet_md2handle(&msg->msg_ev.md_handle, md);
363 lnet_md_deconstruct(md, &msg->msg_ev.md);
367 lnet_complete_msg_locked(struct lnet_msg *msg, int cpt)
369 struct lnet_handle_wire ack_wmd;
371 int status = msg->msg_ev.status;
373 LASSERT(msg->msg_onactivelist);
375 if (status == 0 && msg->msg_ack) {
376 /* Only send an ACK if the PUT completed successfully */
378 lnet_msg_decommit(msg, cpt, 0);
381 lnet_net_unlock(cpt);
383 LASSERT(msg->msg_ev.type == LNET_EVENT_PUT);
384 LASSERT(!msg->msg_routing);
386 ack_wmd = msg->msg_hdr.msg.put.ack_wmd;
388 lnet_prep_send(msg, LNET_MSG_ACK, msg->msg_ev.source, 0, 0);
390 msg->msg_hdr.msg.ack.dst_wmd = ack_wmd;
391 msg->msg_hdr.msg.ack.match_bits = msg->msg_ev.match_bits;
392 msg->msg_hdr.msg.ack.mlength = cpu_to_le32(msg->msg_ev.mlength);
394 rc = lnet_send(msg->msg_ev.target.nid, msg, msg->msg_from);
398 * NB: message is committed for sending, we should return
399 * on success because LND will finalize this message later.
401 * Also, there is possibility that message is committed for
402 * sending and also failed before delivering to LND,
403 * i.e: ENOMEM, in that case we can't fall through either
404 * because CPT for sending can be different with CPT for
405 * receiving, so we should return back to lnet_finalize()
406 * to make sure we are locking the correct partition.
410 } else if (status == 0 && /* OK so far */
411 (msg->msg_routing && !msg->msg_sending)) {
413 LASSERT(!msg->msg_receiving); /* called back recv already */
414 lnet_net_unlock(cpt);
416 rc = lnet_send(LNET_NID_ANY, msg, LNET_NID_ANY);
420 * NB: message is committed for sending, we should return
421 * on success because LND will finalize this message later.
423 * Also, there is possibility that message is committed for
424 * sending and also failed before delivering to LND,
425 * i.e: ENOMEM, in that case we can't fall through either:
426 * - The rule is message must decommit for sending first if
427 * the it's committed for both sending and receiving
428 * - CPT for sending can be different with CPT for receiving,
429 * so we should return back to lnet_finalize() to make
430 * sure we are locking the correct partition.
435 lnet_msg_decommit(msg, cpt, status);
441 lnet_dec_healthv_locked(atomic_t *healthv, int sensitivity)
443 int h = atomic_read(healthv);
445 if (h < sensitivity) {
446 atomic_set(healthv, 0);
449 atomic_set(healthv, h);
454 lnet_handle_local_failure(struct lnet_ni *local_ni)
457 * the lnet_net_lock(0) is used to protect the addref on the ni
458 * and the recovery queue.
461 /* the mt could've shutdown and cleaned up the queues */
462 if (the_lnet.ln_mt_state != LNET_MT_STATE_RUNNING) {
467 lnet_dec_healthv_locked(&local_ni->ni_healthv, lnet_health_sensitivity);
469 * add the NI to the recovery queue if it's not already there
470 * and it's health value is actually below the maximum. It's
471 * possible that the sensitivity might be set to 0, and the health
472 * value will not be reduced. In this case, there is no reason to
475 if (list_empty(&local_ni->ni_recovery) &&
476 atomic_read(&local_ni->ni_healthv) < LNET_MAX_HEALTH_VALUE) {
477 CDEBUG(D_NET, "ni %s added to recovery queue. Health = %d\n",
478 libcfs_nid2str(local_ni->ni_nid),
479 atomic_read(&local_ni->ni_healthv));
480 list_add_tail(&local_ni->ni_recovery,
481 &the_lnet.ln_mt_localNIRecovq);
482 lnet_ni_addref_locked(local_ni, 0);
488 lnet_handle_remote_failure_locked(struct lnet_peer_ni *lpni)
490 __u32 sensitivity = lnet_health_sensitivity;
491 __u32 lp_sensitivity;
495 * 1. lpni could be NULL if we're in the LOLND case
496 * 2. this is a recovery message
502 * If there is a health sensitivity in the peer then use that
503 * instead of the globally set one.
505 lp_sensitivity = lpni->lpni_peer_net->lpn_peer->lp_health_sensitivity;
507 sensitivity = lp_sensitivity;
509 lnet_dec_healthv_locked(&lpni->lpni_healthv, sensitivity);
511 /* update the peer_net's health value */
512 lnet_update_peer_net_healthv(lpni);
515 * add the peer NI to the recovery queue if it's not already there
516 * and it's health value is actually below the maximum. It's
517 * possible that the sensitivity might be set to 0, and the health
518 * value will not be reduced. In this case, there is no reason to
521 lnet_peer_ni_add_to_recoveryq_locked(lpni);
525 lnet_handle_remote_failure(struct lnet_peer_ni *lpni)
527 /* lpni could be NULL if we're in the LOLND case */
532 /* the mt could've shutdown and cleaned up the queues */
533 if (the_lnet.ln_mt_state != LNET_MT_STATE_RUNNING) {
537 lnet_handle_remote_failure_locked(lpni);
542 lnet_incr_hstats(struct lnet_msg *msg, enum lnet_msg_hstatus hstatus)
544 struct lnet_ni *ni = msg->msg_txni;
545 struct lnet_peer_ni *lpni = msg->msg_txpeer;
546 struct lnet_counters_health *health;
548 health = &the_lnet.ln_counters[0]->lct_health;
551 case LNET_MSG_STATUS_LOCAL_INTERRUPT:
552 atomic_inc(&ni->ni_hstats.hlt_local_interrupt);
553 health->lch_local_interrupt_count++;
555 case LNET_MSG_STATUS_LOCAL_DROPPED:
556 atomic_inc(&ni->ni_hstats.hlt_local_dropped);
557 health->lch_local_dropped_count++;
559 case LNET_MSG_STATUS_LOCAL_ABORTED:
560 atomic_inc(&ni->ni_hstats.hlt_local_aborted);
561 health->lch_local_aborted_count++;
563 case LNET_MSG_STATUS_LOCAL_NO_ROUTE:
564 atomic_inc(&ni->ni_hstats.hlt_local_no_route);
565 health->lch_local_no_route_count++;
567 case LNET_MSG_STATUS_LOCAL_TIMEOUT:
568 atomic_inc(&ni->ni_hstats.hlt_local_timeout);
569 health->lch_local_timeout_count++;
571 case LNET_MSG_STATUS_LOCAL_ERROR:
572 atomic_inc(&ni->ni_hstats.hlt_local_error);
573 health->lch_local_error_count++;
575 case LNET_MSG_STATUS_REMOTE_DROPPED:
577 atomic_inc(&lpni->lpni_hstats.hlt_remote_dropped);
578 health->lch_remote_dropped_count++;
580 case LNET_MSG_STATUS_REMOTE_ERROR:
582 atomic_inc(&lpni->lpni_hstats.hlt_remote_error);
583 health->lch_remote_error_count++;
585 case LNET_MSG_STATUS_REMOTE_TIMEOUT:
587 atomic_inc(&lpni->lpni_hstats.hlt_remote_timeout);
588 health->lch_remote_timeout_count++;
590 case LNET_MSG_STATUS_NETWORK_TIMEOUT:
592 atomic_inc(&lpni->lpni_hstats.hlt_network_timeout);
593 health->lch_network_timeout_count++;
595 case LNET_MSG_STATUS_OK:
603 lnet_resend_msg_locked(struct lnet_msg *msg)
605 msg->msg_retry_count++;
608 * remove message from the active list and reset it to prepare
609 * for a resend. Two exceptions to this
611 * 1. the router case. When a message is being routed it is
612 * committed for rx when received and committed for tx when
613 * forwarded. We don't want to remove it from the active list, since
614 * code which handles receiving expects it to remain on the active
617 * 2. The REPLY case. Reply messages use the same message
618 * structure for the GET that was received.
620 if (!msg->msg_routing && msg->msg_type != LNET_MSG_REPLY) {
621 list_del_init(&msg->msg_activelist);
622 msg->msg_onactivelist = 0;
625 * The msg_target.nid which was originally set
626 * when calling LNetGet() or LNetPut() might've
627 * been overwritten if we're routing this message.
628 * Call lnet_msg_decommit_tx() to return the credit
629 * this message consumed. The message will
630 * consume another credit when it gets resent.
632 msg->msg_target.nid = msg->msg_hdr.dest_nid;
633 lnet_msg_decommit_tx(msg, -EAGAIN);
634 msg->msg_sending = 0;
635 msg->msg_receiving = 0;
636 msg->msg_target_is_router = 0;
638 CDEBUG(D_NET, "%s->%s:%s:%s - queuing msg (%p) for resend\n",
639 libcfs_nid2str(msg->msg_hdr.src_nid),
640 libcfs_nid2str(msg->msg_hdr.dest_nid),
641 lnet_msgtyp2str(msg->msg_type),
642 lnet_health_error2str(msg->msg_health_status), msg);
644 list_add_tail(&msg->msg_list, the_lnet.ln_mt_resendqs[msg->msg_tx_cpt]);
646 complete(&the_lnet.ln_mt_wait_complete);
650 lnet_check_finalize_recursion_locked(struct lnet_msg *msg,
651 struct list_head *containerq,
652 int nworkers, void **workers)
657 list_add_tail(&msg->msg_list, containerq);
659 for (i = 0; i < nworkers; i++) {
660 if (workers[i] == current)
663 if (my_slot < 0 && workers[i] == NULL)
667 if (i < nworkers || my_slot < 0)
670 workers[my_slot] = current;
676 lnet_attempt_msg_resend(struct lnet_msg *msg)
678 struct lnet_msg_container *container;
682 /* we can only resend tx_committed messages */
683 LASSERT(msg->msg_tx_committed);
685 /* don't resend recovery messages */
686 if (msg->msg_recovery) {
687 CDEBUG(D_NET, "msg %s->%s is a recovery ping. retry# %d\n",
688 libcfs_nid2str(msg->msg_from),
689 libcfs_nid2str(msg->msg_target.nid),
690 msg->msg_retry_count);
691 return -ENOTRECOVERABLE;
695 * if we explicitly indicated we don't want to resend then just
698 if (msg->msg_no_resend) {
699 CDEBUG(D_NET, "msg %s->%s requested no resend. retry# %d\n",
700 libcfs_nid2str(msg->msg_from),
701 libcfs_nid2str(msg->msg_target.nid),
702 msg->msg_retry_count);
703 return -ENOTRECOVERABLE;
706 /* check if the message has exceeded the number of retries */
707 if (msg->msg_retry_count >= lnet_retry_count) {
708 CNETERR("msg %s->%s exceeded retry count %d\n",
709 libcfs_nid2str(msg->msg_from),
710 libcfs_nid2str(msg->msg_target.nid),
711 msg->msg_retry_count);
712 return -ENOTRECOVERABLE;
715 cpt = msg->msg_tx_cpt;
718 /* check again under lock */
719 if (the_lnet.ln_mt_state != LNET_MT_STATE_RUNNING) {
720 lnet_net_unlock(cpt);
724 container = the_lnet.ln_msg_containers[cpt];
726 lnet_check_finalize_recursion_locked(msg,
727 &container->msc_resending,
728 container->msc_nfinalizers,
729 container->msc_resenders);
731 /* enough threads are resending */
733 lnet_net_unlock(cpt);
737 while (!list_empty(&container->msc_resending)) {
738 msg = list_entry(container->msc_resending.next,
739 struct lnet_msg, msg_list);
740 list_del(&msg->msg_list);
743 * resending the message will require us to call
744 * lnet_msg_decommit_tx() which will return the credit
745 * which this message holds. This could trigger another
746 * queued message to be sent. If that message fails and
747 * requires a resend we will recurse.
748 * But since at this point the slot is taken, the message
749 * will be queued in the container and dealt with
750 * later. This breaks the recursion.
752 lnet_resend_msg_locked(msg);
756 * msc_resenders is an array of process pointers. Each entry holds
757 * a pointer to the current process operating on the message. An
758 * array entry is created per CPT. If the array slot is already
759 * set, then it means that there is a thread on the CPT currently
760 * resending a message.
761 * Once the thread finishes clear the slot to enable the thread to
762 * take on more resend work.
764 container->msc_resenders[my_slot] = NULL;
765 lnet_net_unlock(cpt);
771 * Do a health check on the message:
772 * return -1 if we're not going to handle the error or
773 * if we've reached the maximum number of retries.
774 * success case will return -1 as well
775 * return 0 if it the message is requeued for send
778 lnet_health_check(struct lnet_msg *msg)
780 enum lnet_msg_hstatus hstatus = msg->msg_health_status;
781 struct lnet_peer_ni *lpni;
785 /* if we're shutting down no point in handling health. */
786 if (the_lnet.ln_mt_state != LNET_MT_STATE_RUNNING)
789 LASSERT(msg->msg_tx_committed || msg->msg_rx_committed);
792 * if we're sending to the LOLND then the msg_txpeer will not be
793 * set. So no need to sanity check it.
795 if (msg->msg_tx_committed &&
796 LNET_NETTYP(LNET_NIDNET(msg->msg_txni->ni_nid)) != LOLND)
797 LASSERT(msg->msg_txpeer);
798 else if (msg->msg_tx_committed &&
799 LNET_NETTYP(LNET_NIDNET(msg->msg_txni->ni_nid)) == LOLND)
802 if (hstatus != LNET_MSG_STATUS_OK &&
803 ktime_compare(ktime_get(), msg->msg_deadline) >= 0)
807 * stats are only incremented for errors so avoid wasting time
808 * incrementing statistics if there is no error.
810 if (hstatus != LNET_MSG_STATUS_OK) {
812 lnet_incr_hstats(msg, hstatus);
817 * always prefer txni/txpeer if they message is committed for both
820 if (msg->msg_tx_committed) {
822 lpni = msg->msg_txpeer;
825 lpni = msg->msg_rxpeer;
833 CDEBUG(D_NET, "health check: %s->%s: %s: %s\n",
834 libcfs_nid2str(ni->ni_nid),
835 (lo) ? "self" : libcfs_nid2str(lpni->lpni_nid),
836 lnet_msgtyp2str(msg->msg_type),
837 lnet_health_error2str(hstatus));
840 case LNET_MSG_STATUS_OK:
842 * increment the local ni health weather we successfully
843 * received or sent a message on it.
845 lnet_inc_healthv(&ni->ni_healthv, lnet_health_sensitivity);
847 * It's possible msg_txpeer is NULL in the LOLND
848 * case. Only increment the peer's health if we're
849 * receiving a message from it. It's the only sure way to
850 * know that a remote interface is up.
851 * If this interface is part of a router, then take that
852 * as indication that the router is fully healthy.
854 if (lpni && msg->msg_rx_committed) {
856 * If we're receiving a message from the router or
857 * I'm a router, then set that lpni's health to
858 * maximum so we can commence communication
861 if (lnet_isrouter(lpni) || the_lnet.ln_routing) {
862 lnet_set_lpni_healthv_locked(lpni,
863 LNET_MAX_HEALTH_VALUE);
865 __u32 sensitivity = lpni->lpni_peer_net->
866 lpn_peer->lp_health_sensitivity;
868 lnet_inc_lpni_healthv_locked(lpni,
869 (sensitivity) ? sensitivity :
870 lnet_health_sensitivity);
875 /* we can finalize this message */
877 case LNET_MSG_STATUS_LOCAL_INTERRUPT:
878 case LNET_MSG_STATUS_LOCAL_DROPPED:
879 case LNET_MSG_STATUS_LOCAL_ABORTED:
880 case LNET_MSG_STATUS_LOCAL_NO_ROUTE:
881 case LNET_MSG_STATUS_LOCAL_TIMEOUT:
883 * don't further decrement the health value if the
884 * recovery message failed.
886 if (!msg->msg_recovery)
887 lnet_handle_local_failure(ni);
888 if (msg->msg_tx_committed)
889 /* add to the re-send queue */
890 return lnet_attempt_msg_resend(msg);
894 * These errors will not trigger a resend so simply
895 * finalize the message
897 case LNET_MSG_STATUS_LOCAL_ERROR:
899 * don't further decrement the health value if the
900 * recovery message failed.
902 if (!msg->msg_recovery)
903 lnet_handle_local_failure(ni);
907 * TODO: since the remote dropped the message we can
908 * attempt a resend safely.
910 case LNET_MSG_STATUS_REMOTE_DROPPED:
911 if (!msg->msg_recovery)
912 lnet_handle_remote_failure(lpni);
913 if (msg->msg_tx_committed)
914 return lnet_attempt_msg_resend(msg);
917 case LNET_MSG_STATUS_REMOTE_ERROR:
918 case LNET_MSG_STATUS_REMOTE_TIMEOUT:
919 case LNET_MSG_STATUS_NETWORK_TIMEOUT:
920 if (!msg->msg_recovery)
921 lnet_handle_remote_failure(lpni);
927 /* no resend is needed */
932 lnet_msg_detach_md(struct lnet_msg *msg, int cpt, int status)
934 struct lnet_libmd *md = msg->msg_md;
937 /* Now it's safe to drop my caller's ref */
939 LASSERT(md->md_refcount >= 0);
941 unlink = lnet_md_unlinkable(md);
942 if (md->md_eq != NULL) {
943 if ((md->md_flags & LNET_MD_FLAG_ABORTED) && !status) {
944 msg->msg_ev.status = -ETIMEDOUT;
945 CDEBUG(D_NET, "md 0x%p already unlinked\n", md);
947 msg->msg_ev.status = status;
949 msg->msg_ev.unlinked = unlink;
950 md->md_eq(&msg->msg_ev);
953 if (unlink || (md->md_refcount == 0 &&
954 md->md_threshold == LNET_MD_THRESH_INF))
955 lnet_detach_rsp_tracker(md, cpt);
964 lnet_is_health_check(struct lnet_msg *msg)
967 int status = msg->msg_ev.status;
969 if ((!msg->msg_tx_committed && !msg->msg_rx_committed) ||
970 !msg->msg_onactivelist) {
971 CDEBUG(D_NET, "msg %p not committed for send or receive\n",
976 if ((msg->msg_tx_committed && !msg->msg_txpeer) ||
977 (msg->msg_rx_committed && !msg->msg_rxpeer)) {
978 /* The optimized GET case does not set msg_rxpeer, but status
979 * could be zero. Only print the error message if we have a
983 CDEBUG(D_NET, "msg %p status %d cannot retry\n", msg,
988 /* Check for status inconsistencies */
989 if ((!status && msg->msg_health_status != LNET_MSG_STATUS_OK) ||
990 (status && msg->msg_health_status == LNET_MSG_STATUS_OK)) {
991 CDEBUG(D_NET, "Msg %p is in inconsistent state, don't perform health "
992 "checking (%d, %d)\n", msg, status,
993 msg->msg_health_status);
997 CDEBUG(D_NET, "health check = %d, status = %d, hstatus = %d\n",
998 hc, status, msg->msg_health_status);
1004 lnet_health_error2str(enum lnet_msg_hstatus hstatus)
1007 case LNET_MSG_STATUS_LOCAL_INTERRUPT:
1008 return "LOCAL_INTERRUPT";
1009 case LNET_MSG_STATUS_LOCAL_DROPPED:
1010 return "LOCAL_DROPPED";
1011 case LNET_MSG_STATUS_LOCAL_ABORTED:
1012 return "LOCAL_ABORTED";
1013 case LNET_MSG_STATUS_LOCAL_NO_ROUTE:
1014 return "LOCAL_NO_ROUTE";
1015 case LNET_MSG_STATUS_LOCAL_TIMEOUT:
1016 return "LOCAL_TIMEOUT";
1017 case LNET_MSG_STATUS_LOCAL_ERROR:
1018 return "LOCAL_ERROR";
1019 case LNET_MSG_STATUS_REMOTE_DROPPED:
1020 return "REMOTE_DROPPED";
1021 case LNET_MSG_STATUS_REMOTE_ERROR:
1022 return "REMOTE_ERROR";
1023 case LNET_MSG_STATUS_REMOTE_TIMEOUT:
1024 return "REMOTE_TIMEOUT";
1025 case LNET_MSG_STATUS_NETWORK_TIMEOUT:
1026 return "NETWORK_TIMEOUT";
1027 case LNET_MSG_STATUS_OK:
1035 lnet_send_error_simulation(struct lnet_msg *msg,
1036 enum lnet_msg_hstatus *hstatus)
1041 if (list_empty(&the_lnet.ln_drop_rules))
1044 /* match only health rules */
1045 if (!lnet_drop_rule_match(&msg->msg_hdr, LNET_NID_ANY,
1049 CDEBUG(D_NET, "src %s(%s)->dst %s: %s simulate health error: %s\n",
1050 libcfs_nid2str(msg->msg_hdr.src_nid),
1051 libcfs_nid2str(msg->msg_txni->ni_nid),
1052 libcfs_nid2str(msg->msg_hdr.dest_nid),
1053 lnet_msgtyp2str(msg->msg_type),
1054 lnet_health_error2str(*hstatus));
1058 EXPORT_SYMBOL(lnet_send_error_simulation);
1061 lnet_finalize(struct lnet_msg *msg, int status)
1063 struct lnet_msg_container *container;
1068 LASSERT(!in_interrupt());
1073 msg->msg_ev.status = status;
1075 if (lnet_is_health_check(msg)) {
1077 * Check the health status of the message. If it has one
1078 * of the errors that we're supposed to handle, and it has
1079 * not timed out, then
1080 * 1. Decrement the appropriate health_value
1081 * 2. queue the message on the resend queue
1083 * if the message send is success, timed out or failed in the
1084 * health check for any reason then we'll just finalize the
1085 * message. Otherwise just return since the message has been
1086 * put on the resend queue.
1088 if (!lnet_health_check(msg))
1093 * We're not going to resend this message so detach its MD and invoke
1094 * the appropriate callbacks
1096 if (msg->msg_md != NULL) {
1097 cpt = lnet_cpt_of_cookie(msg->msg_md->md_lh.lh_cookie);
1099 lnet_msg_detach_md(msg, cpt, status);
1100 lnet_res_unlock(cpt);
1104 if (!msg->msg_tx_committed && !msg->msg_rx_committed) {
1105 /* not committed to network yet */
1106 LASSERT(!msg->msg_onactivelist);
1112 * NB: routed message can be committed for both receiving and sending,
1113 * we should finalize in LIFO order and keep counters correct.
1114 * (finalize sending first then finalize receiving)
1116 cpt = msg->msg_tx_committed ? msg->msg_tx_cpt : msg->msg_rx_cpt;
1119 container = the_lnet.ln_msg_containers[cpt];
1121 /* Recursion breaker. Don't complete the message here if I am (or
1122 * enough other threads are) already completing messages */
1123 my_slot = lnet_check_finalize_recursion_locked(msg,
1124 &container->msc_finalizing,
1125 container->msc_nfinalizers,
1126 container->msc_finalizers);
1128 /* enough threads are resending */
1129 if (my_slot == -1) {
1130 lnet_net_unlock(cpt);
1135 while (!list_empty(&container->msc_finalizing)) {
1136 msg = list_entry(container->msc_finalizing.next,
1137 struct lnet_msg, msg_list);
1139 list_del_init(&msg->msg_list);
1141 /* NB drops and regains the lnet lock if it actually does
1142 * anything, so my finalizing friends can chomp along too */
1143 rc = lnet_complete_msg_locked(msg, cpt);
1148 if (unlikely(!list_empty(&the_lnet.ln_delay_rules))) {
1149 lnet_net_unlock(cpt);
1150 lnet_delay_rule_check();
1154 container->msc_finalizers[my_slot] = NULL;
1155 lnet_net_unlock(cpt);
1160 EXPORT_SYMBOL(lnet_finalize);
1163 lnet_msg_container_cleanup(struct lnet_msg_container *container)
1167 if (container->msc_init == 0)
1170 while (!list_empty(&container->msc_active)) {
1171 struct lnet_msg *msg;
1173 msg = list_entry(container->msc_active.next,
1174 struct lnet_msg, msg_activelist);
1175 LASSERT(msg->msg_onactivelist);
1176 msg->msg_onactivelist = 0;
1177 list_del_init(&msg->msg_activelist);
1183 CERROR("%d active msg on exit\n", count);
1185 if (container->msc_finalizers != NULL) {
1186 CFS_FREE_PTR_ARRAY(container->msc_finalizers,
1187 container->msc_nfinalizers);
1188 container->msc_finalizers = NULL;
1191 if (container->msc_resenders != NULL) {
1192 CFS_FREE_PTR_ARRAY(container->msc_resenders,
1193 container->msc_nfinalizers);
1194 container->msc_resenders = NULL;
1196 container->msc_init = 0;
1200 lnet_msg_container_setup(struct lnet_msg_container *container, int cpt)
1204 container->msc_init = 1;
1206 INIT_LIST_HEAD(&container->msc_active);
1207 INIT_LIST_HEAD(&container->msc_finalizing);
1208 INIT_LIST_HEAD(&container->msc_resending);
1210 /* number of CPUs */
1211 container->msc_nfinalizers = cfs_cpt_weight(lnet_cpt_table(), cpt);
1212 if (container->msc_nfinalizers == 0)
1213 container->msc_nfinalizers = 1;
1215 LIBCFS_CPT_ALLOC(container->msc_finalizers, lnet_cpt_table(), cpt,
1216 container->msc_nfinalizers *
1217 sizeof(*container->msc_finalizers));
1219 if (container->msc_finalizers == NULL) {
1220 CERROR("Failed to allocate message finalizers\n");
1221 lnet_msg_container_cleanup(container);
1225 LIBCFS_CPT_ALLOC(container->msc_resenders, lnet_cpt_table(), cpt,
1226 container->msc_nfinalizers *
1227 sizeof(*container->msc_resenders));
1229 if (container->msc_resenders == NULL) {
1230 CERROR("Failed to allocate message resenders\n");
1231 lnet_msg_container_cleanup(container);
1239 lnet_msg_containers_destroy(void)
1241 struct lnet_msg_container *container;
1244 if (the_lnet.ln_msg_containers == NULL)
1247 cfs_percpt_for_each(container, i, the_lnet.ln_msg_containers)
1248 lnet_msg_container_cleanup(container);
1250 cfs_percpt_free(the_lnet.ln_msg_containers);
1251 the_lnet.ln_msg_containers = NULL;
1255 lnet_msg_containers_create(void)
1257 struct lnet_msg_container *container;
1261 the_lnet.ln_msg_containers = cfs_percpt_alloc(lnet_cpt_table(),
1262 sizeof(*container));
1264 if (the_lnet.ln_msg_containers == NULL) {
1265 CERROR("Failed to allocate cpu-partition data for network\n");
1269 cfs_percpt_for_each(container, i, the_lnet.ln_msg_containers) {
1270 rc = lnet_msg_container_setup(container, i);
1272 lnet_msg_containers_destroy();