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) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2012, 2014, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
35 #define DEBUG_SUBSYSTEM S_LNET
37 #include <lnet/lib-lnet.h>
38 #include <lnet/lib-dlc.h>
41 lnet_peer_remove_from_remote_list(struct lnet_peer_ni *lpni)
43 if (!list_empty(&lpni->lpni_on_remote_peer_ni_list)) {
44 list_del_init(&lpni->lpni_on_remote_peer_ni_list);
45 lnet_peer_ni_decref_locked(lpni);
50 lnet_peer_net_added(struct lnet_net *net)
52 struct lnet_peer_ni *lpni, *tmp;
54 list_for_each_entry_safe(lpni, tmp, &the_lnet.ln_remote_peer_ni_list,
55 lpni_on_remote_peer_ni_list) {
57 if (LNET_NIDNET(lpni->lpni_nid) == net->net_id) {
59 lpni->lpni_txcredits =
60 lpni->lpni_mintxcredits =
61 lpni->lpni_net->net_tunables.lct_peer_tx_credits;
62 lpni->lpni_rtrcredits =
63 lpni->lpni_minrtrcredits =
64 lnet_peer_buffer_credits(lpni->lpni_net);
66 lnet_peer_remove_from_remote_list(lpni);
72 lnet_peer_tables_destroy(void)
74 struct lnet_peer_table *ptable;
75 struct list_head *hash;
79 if (!the_lnet.ln_peer_tables)
82 cfs_percpt_for_each(ptable, i, the_lnet.ln_peer_tables) {
83 hash = ptable->pt_hash;
84 if (!hash) /* not intialized */
87 ptable->pt_hash = NULL;
88 for (j = 0; j < LNET_PEER_HASH_SIZE; j++)
89 LASSERT(list_empty(&hash[j]));
91 LIBCFS_FREE(hash, LNET_PEER_HASH_SIZE * sizeof(*hash));
94 cfs_percpt_free(the_lnet.ln_peer_tables);
95 the_lnet.ln_peer_tables = NULL;
99 lnet_peer_tables_create(void)
101 struct lnet_peer_table *ptable;
102 struct list_head *hash;
106 the_lnet.ln_peer_tables = cfs_percpt_alloc(lnet_cpt_table(),
108 if (the_lnet.ln_peer_tables == NULL) {
109 CERROR("Failed to allocate cpu-partition peer tables\n");
113 cfs_percpt_for_each(ptable, i, the_lnet.ln_peer_tables) {
114 LIBCFS_CPT_ALLOC(hash, lnet_cpt_table(), i,
115 LNET_PEER_HASH_SIZE * sizeof(*hash));
117 CERROR("Failed to create peer hash table\n");
118 lnet_peer_tables_destroy();
122 for (j = 0; j < LNET_PEER_HASH_SIZE; j++)
123 INIT_LIST_HEAD(&hash[j]);
124 ptable->pt_hash = hash; /* sign of initialization */
130 void lnet_peer_uninit()
133 struct lnet_peer_ni *lpni, *tmp;
134 struct lnet_peer_table *ptable = NULL;
136 /* remove all peer_nis from the remote peer and he hash list */
137 list_for_each_entry_safe(lpni, tmp, &the_lnet.ln_remote_peer_ni_list,
138 lpni_on_remote_peer_ni_list) {
139 list_del_init(&lpni->lpni_on_remote_peer_ni_list);
140 lnet_peer_ni_decref_locked(lpni);
142 cpt = lnet_cpt_of_nid_locked(lpni->lpni_nid, NULL);
143 ptable = the_lnet.ln_peer_tables[cpt];
144 ptable->pt_zombies++;
146 list_del_init(&lpni->lpni_hashlist);
147 lnet_peer_ni_decref_locked(lpni);
150 lnet_peer_tables_destroy();
154 lnet_peer_table_cleanup_locked(lnet_ni_t *ni, struct lnet_peer_table *ptable)
157 struct lnet_peer_ni *lp;
158 struct lnet_peer_ni *tmp;
160 for (i = 0; i < LNET_PEER_HASH_SIZE; i++) {
161 list_for_each_entry_safe(lp, tmp, &ptable->pt_hash[i],
163 if (ni != NULL && ni->ni_net != lp->lpni_net)
165 list_del_init(&lp->lpni_hashlist);
166 /* Lose hash table's ref */
167 ptable->pt_zombies++;
168 lnet_peer_ni_decref_locked(lp);
174 lnet_peer_table_finalize_wait_locked(struct lnet_peer_table *ptable,
179 for (i = 3; ptable->pt_zombies != 0; i++) {
180 lnet_net_unlock(cpt_locked);
184 "Waiting for %d zombies on peer table\n",
187 set_current_state(TASK_UNINTERRUPTIBLE);
188 schedule_timeout(cfs_time_seconds(1) >> 1);
189 lnet_net_lock(cpt_locked);
194 lnet_peer_table_del_rtrs_locked(lnet_ni_t *ni, struct lnet_peer_table *ptable,
197 struct lnet_peer_ni *lp;
198 struct lnet_peer_ni *tmp;
202 for (i = 0; i < LNET_PEER_HASH_SIZE; i++) {
203 list_for_each_entry_safe(lp, tmp, &ptable->pt_hash[i],
205 if (ni->ni_net != lp->lpni_net)
208 if (lp->lpni_rtr_refcount == 0)
211 lpni_nid = lp->lpni_nid;
213 lnet_net_unlock(cpt_locked);
214 lnet_del_route(LNET_NIDNET(LNET_NID_ANY), lpni_nid);
215 lnet_net_lock(cpt_locked);
221 lnet_peer_tables_cleanup(lnet_ni_t *ni)
224 struct lnet_peer_table *ptable;
226 LASSERT(the_lnet.ln_shutdown || ni != NULL);
227 /* If just deleting the peers for a NI, get rid of any routes these
228 * peers are gateways for. */
229 cfs_percpt_for_each(ptable, i, the_lnet.ln_peer_tables) {
230 lnet_net_lock(LNET_LOCK_EX);
231 lnet_peer_table_del_rtrs_locked(ni, ptable, i);
232 lnet_net_unlock(LNET_LOCK_EX);
235 /* Start the cleanup process */
236 cfs_percpt_for_each(ptable, i, the_lnet.ln_peer_tables) {
237 lnet_net_lock(LNET_LOCK_EX);
238 lnet_peer_table_cleanup_locked(ni, ptable);
239 lnet_net_unlock(LNET_LOCK_EX);
242 /* Wait until all peers have been destroyed. */
243 cfs_percpt_for_each(ptable, i, the_lnet.ln_peer_tables) {
244 lnet_net_lock(LNET_LOCK_EX);
245 lnet_peer_table_finalize_wait_locked(ptable, i);
246 lnet_net_unlock(LNET_LOCK_EX);
250 static struct lnet_peer_ni *
251 lnet_get_peer_ni_locked(struct lnet_peer_table *ptable, lnet_nid_t nid)
253 struct list_head *peers;
254 struct lnet_peer_ni *lp;
256 LASSERT(!the_lnet.ln_shutdown);
258 peers = &ptable->pt_hash[lnet_nid2peerhash(nid)];
259 list_for_each_entry(lp, peers, lpni_hashlist) {
260 if (lp->lpni_nid == nid) {
261 lnet_peer_ni_addref_locked(lp);
269 struct lnet_peer_ni *
270 lnet_find_peer_ni_locked(lnet_nid_t nid)
272 struct lnet_peer_ni *lpni;
273 struct lnet_peer_table *ptable;
276 cpt = lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
278 ptable = the_lnet.ln_peer_tables[cpt];
279 lpni = lnet_get_peer_ni_locked(ptable, nid);
285 lnet_find_or_create_peer_locked(lnet_nid_t dst_nid, int cpt, struct lnet_peer **peer)
287 struct lnet_peer_ni *lpni;
289 lpni = lnet_find_peer_ni_locked(dst_nid);
292 rc = lnet_nid2peerni_locked(&lpni, dst_nid, cpt);
297 *peer = lpni->lpni_peer_net->lpn_peer;
298 lnet_peer_ni_decref_locked(lpni);
303 struct lnet_peer_ni *
304 lnet_get_peer_ni_idx_locked(int idx, struct lnet_peer_net **lpn,
305 struct lnet_peer **lp)
307 struct lnet_peer_ni *lpni;
309 list_for_each_entry((*lp), &the_lnet.ln_peers, lp_on_lnet_peer_list) {
310 list_for_each_entry((*lpn), &((*lp)->lp_peer_nets), lpn_on_peer_list) {
311 list_for_each_entry(lpni, &((*lpn)->lpn_peer_nis),
312 lpni_on_peer_net_list)
321 struct lnet_peer_ni *
322 lnet_get_next_peer_ni_locked(struct lnet_peer *peer,
323 struct lnet_peer_net *peer_net,
324 struct lnet_peer_ni *prev)
326 struct lnet_peer_ni *lpni;
327 struct lnet_peer_net *net = peer_net;
331 net = list_entry(peer->lp_peer_nets.next,
332 struct lnet_peer_net,
334 lpni = list_entry(net->lpn_peer_nis.next, struct lnet_peer_ni,
335 lpni_on_peer_net_list);
340 if (prev->lpni_on_peer_net_list.next ==
341 &prev->lpni_peer_net->lpn_peer_nis) {
343 * if you reached the end of the peer ni list and the peer
344 * net is specified then there are no more peer nis in that
351 * we reached the end of this net ni list. move to the
354 if (prev->lpni_peer_net->lpn_on_peer_list.next ==
356 /* no more nets and no more NIs. */
359 /* get the next net */
360 net = list_entry(prev->lpni_peer_net->lpn_on_peer_list.next,
361 struct lnet_peer_net,
363 /* get the ni on it */
364 lpni = list_entry(net->lpn_peer_nis.next, struct lnet_peer_ni,
365 lpni_on_peer_net_list);
370 /* there are more nis left */
371 lpni = list_entry(prev->lpni_on_peer_net_list.next,
372 struct lnet_peer_ni, lpni_on_peer_net_list);
378 lnet_peer_is_ni_pref_locked(struct lnet_peer_ni *lpni, struct lnet_ni *ni)
382 for (i = 0; i < lpni->lpni_pref_nnids; i++) {
383 if (lpni->lpni_pref_nids[i] == ni->ni_nid)
390 lnet_try_destroy_peer_hierarchy_locked(struct lnet_peer_ni *lpni)
392 struct lnet_peer_net *peer_net;
393 struct lnet_peer *peer;
395 /* TODO: could the below situation happen? accessing an already
397 if (lpni->lpni_peer_net == NULL ||
398 lpni->lpni_peer_net->lpn_peer == NULL)
401 peer_net = lpni->lpni_peer_net;
402 peer = lpni->lpni_peer_net->lpn_peer;
404 list_del_init(&lpni->lpni_on_peer_net_list);
405 lpni->lpni_peer_net = NULL;
407 /* if peer_net is empty, then remove it from the peer */
408 if (list_empty(&peer_net->lpn_peer_nis)) {
409 list_del_init(&peer_net->lpn_on_peer_list);
410 peer_net->lpn_peer = NULL;
411 LIBCFS_FREE(peer_net, sizeof(*peer_net));
413 /* if the peer is empty then remove it from the
414 * the_lnet.ln_peers */
415 if (list_empty(&peer->lp_peer_nets)) {
416 list_del_init(&peer->lp_on_lnet_peer_list);
417 LIBCFS_FREE(peer, sizeof(*peer));
423 lnet_build_peer_hierarchy(struct lnet_peer_ni *lpni)
425 struct lnet_peer *peer;
426 struct lnet_peer_net *peer_net;
427 __u32 lpni_net = LNET_NIDNET(lpni->lpni_nid);
432 LIBCFS_ALLOC(peer, sizeof(*peer));
436 LIBCFS_ALLOC(peer_net, sizeof(*peer_net));
437 if (peer_net == NULL) {
438 LIBCFS_FREE(peer, sizeof(*peer));
442 INIT_LIST_HEAD(&peer->lp_on_lnet_peer_list);
443 INIT_LIST_HEAD(&peer->lp_peer_nets);
444 INIT_LIST_HEAD(&peer_net->lpn_on_peer_list);
445 INIT_LIST_HEAD(&peer_net->lpn_peer_nis);
447 /* build the hierarchy */
448 peer_net->lpn_net_id = lpni_net;
449 peer_net->lpn_peer = peer;
450 lpni->lpni_peer_net = peer_net;
451 peer->lp_primary_nid = lpni->lpni_nid;
452 list_add_tail(&peer_net->lpn_on_peer_list, &peer->lp_peer_nets);
453 list_add_tail(&lpni->lpni_on_peer_net_list, &peer_net->lpn_peer_nis);
454 list_add_tail(&peer->lp_on_lnet_peer_list, &the_lnet.ln_peers);
459 struct lnet_peer_net *
460 lnet_peer_get_net_locked(struct lnet_peer *peer, __u32 net_id)
462 struct lnet_peer_net *peer_net;
463 list_for_each_entry(peer_net, &peer->lp_peer_nets, lpn_on_peer_list) {
464 if (peer_net->lpn_net_id == net_id)
471 * given the key nid find the peer to add the new peer NID to. If the key
472 * nid is NULL, then create a new peer, but first make sure that the NID
476 lnet_add_peer_ni_to_peer(lnet_nid_t key_nid, lnet_nid_t nid)
478 struct lnet_peer_ni *lpni, *lpni2;
479 struct lnet_peer *peer;
480 struct lnet_peer_net *peer_net, *pn;
482 struct lnet_peer_table *ptable = NULL;
483 __u32 net_id = LNET_NIDNET(nid);
485 if (nid == LNET_NID_ANY)
488 /* check that nid is unique */
489 cpt = lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
491 lpni = lnet_find_peer_ni_locked(nid);
493 lnet_peer_ni_decref_locked(lpni);
494 lnet_net_unlock(cpt);
497 lnet_net_unlock(cpt);
499 if (key_nid != LNET_NID_ANY) {
500 cpt2 = lnet_nid_cpt_hash(key_nid, LNET_CPT_NUMBER);
502 lpni = lnet_find_peer_ni_locked(key_nid);
504 lnet_net_unlock(cpt2);
505 /* key_nid refers to a non-existant peer_ni.*/
508 peer = lpni->lpni_peer_net->lpn_peer;
509 peer->lp_multi_rail = true;
510 lnet_peer_ni_decref_locked(lpni);
511 lnet_net_unlock(cpt2);
513 lnet_net_lock(LNET_LOCK_EX);
514 rc = lnet_nid2peerni_locked(&lpni, nid, LNET_LOCK_EX);
516 lpni->lpni_peer_net->lpn_peer->lp_multi_rail = true;
517 lnet_peer_ni_decref_locked(lpni);
519 lnet_net_unlock(LNET_LOCK_EX);
525 LIBCFS_CPT_ALLOC(lpni, lnet_cpt_table(), cpt, sizeof(*lpni));
529 INIT_LIST_HEAD(&lpni->lpni_txq);
530 INIT_LIST_HEAD(&lpni->lpni_rtrq);
531 INIT_LIST_HEAD(&lpni->lpni_routes);
532 INIT_LIST_HEAD(&lpni->lpni_hashlist);
533 INIT_LIST_HEAD(&lpni->lpni_on_peer_net_list);
534 INIT_LIST_HEAD(&lpni->lpni_on_remote_peer_ni_list);
536 lpni->lpni_alive = !lnet_peers_start_down(); /* 1 bit!! */
537 lpni->lpni_last_alive = cfs_time_current(); /* assumes alive */
538 lpni->lpni_ping_feats = LNET_PING_FEAT_INVAL;
539 lpni->lpni_nid = nid;
540 lpni->lpni_cpt = cpt;
541 lnet_set_peer_ni_health_locked(lpni, true);
543 /* allocate here in case we need to add a new peer_net */
545 LIBCFS_ALLOC(peer_net, sizeof(*peer_net));
546 if (peer_net == NULL) {
549 LIBCFS_FREE(lpni, sizeof(*lpni));
553 lnet_net_lock(LNET_LOCK_EX);
555 ptable = the_lnet.ln_peer_tables[cpt];
558 lpni2 = lnet_find_peer_ni_locked(nid);
560 lnet_peer_ni_decref_locked(lpni2);
561 /* sanity check that lpni2's peer is what we expect */
562 if (lpni2->lpni_peer_net->lpn_peer != peer)
568 /* another thread has already added it */
569 lnet_net_unlock(LNET_LOCK_EX);
570 LIBCFS_FREE(peer_net, sizeof(*peer_net));
574 lpni->lpni_net = lnet_get_net_locked(LNET_NIDNET(lpni->lpni_nid));
575 if (lpni->lpni_net != NULL) {
576 lpni->lpni_txcredits =
577 lpni->lpni_mintxcredits =
578 lpni->lpni_net->net_tunables.lct_peer_tx_credits;
579 lpni->lpni_rtrcredits =
580 lpni->lpni_minrtrcredits = lnet_peer_buffer_credits(lpni->lpni_net);
583 * if you're adding a peer which is not on a local network
584 * then we can't assign any of the credits. It won't be
585 * picked for sending anyway. Eventually a network can be
586 * added, in this case we need to revisit this peer and
587 * update its credits.
590 /* increment refcount for remote peer list */
591 atomic_inc(&lpni->lpni_refcount);
592 list_add_tail(&lpni->lpni_on_remote_peer_ni_list,
593 &the_lnet.ln_remote_peer_ni_list);
596 /* increment refcount for peer on hash list */
597 atomic_inc(&lpni->lpni_refcount);
599 list_add_tail(&lpni->lpni_hashlist,
600 &ptable->pt_hash[lnet_nid2peerhash(nid)]);
601 ptable->pt_version++;
603 /* add the lpni to a net */
604 list_for_each_entry(pn, &peer->lp_peer_nets, lpn_on_peer_list) {
605 if (pn->lpn_net_id == net_id) {
606 list_add_tail(&lpni->lpni_on_peer_net_list,
608 lpni->lpni_peer_net = pn;
609 lnet_net_unlock(LNET_LOCK_EX);
610 LIBCFS_FREE(peer_net, sizeof(*peer_net));
615 INIT_LIST_HEAD(&peer_net->lpn_on_peer_list);
616 INIT_LIST_HEAD(&peer_net->lpn_peer_nis);
618 /* build the hierarchy */
619 peer_net->lpn_net_id = net_id;
620 peer_net->lpn_peer = peer;
621 lpni->lpni_peer_net = peer_net;
622 list_add_tail(&lpni->lpni_on_peer_net_list, &peer_net->lpn_peer_nis);
623 list_add_tail(&peer_net->lpn_on_peer_list, &peer->lp_peer_nets);
625 lnet_net_unlock(LNET_LOCK_EX);
630 lnet_del_peer_ni_from_peer(lnet_nid_t key_nid, lnet_nid_t nid)
633 lnet_nid_t local_nid;
634 struct lnet_peer *peer;
635 struct lnet_peer_ni *lpni, *lpni2;
636 struct lnet_peer_table *ptable = NULL;
638 if (key_nid == LNET_NID_ANY)
641 local_nid = (nid != LNET_NID_ANY) ? nid : key_nid;
642 cpt = lnet_nid_cpt_hash(local_nid, LNET_CPT_NUMBER);
643 lnet_net_lock(LNET_LOCK_EX);
645 lpni = lnet_find_peer_ni_locked(local_nid);
647 lnet_net_unlock(cpt);
650 lnet_peer_ni_decref_locked(lpni);
652 peer = lpni->lpni_peer_net->lpn_peer;
653 LASSERT(peer != NULL);
655 if (peer->lp_primary_nid == lpni->lpni_nid) {
657 * deleting the primary ni is equivalent to deleting the
661 lpni = lnet_get_next_peer_ni_locked(peer, NULL, lpni);
662 while (lpni != NULL) {
663 lpni2 = lnet_get_next_peer_ni_locked(peer, NULL, lpni);
664 cpt = lnet_nid_cpt_hash(lpni->lpni_nid,
666 lnet_peer_remove_from_remote_list(lpni);
667 ptable = the_lnet.ln_peer_tables[cpt];
668 ptable->pt_zombies++;
669 list_del_init(&lpni->lpni_hashlist);
670 lnet_peer_ni_decref_locked(lpni);
673 lnet_net_unlock(LNET_LOCK_EX);
678 lnet_peer_remove_from_remote_list(lpni);
679 cpt = lnet_nid_cpt_hash(lpni->lpni_nid, LNET_CPT_NUMBER);
680 ptable = the_lnet.ln_peer_tables[cpt];
681 ptable->pt_zombies++;
682 list_del_init(&lpni->lpni_hashlist);
683 lnet_peer_ni_decref_locked(lpni);
684 lnet_net_unlock(LNET_LOCK_EX);
690 lnet_destroy_peer_ni_locked(struct lnet_peer_ni *lpni)
692 struct lnet_peer_table *ptable;
694 LASSERT(atomic_read(&lpni->lpni_refcount) == 0);
695 LASSERT(lpni->lpni_rtr_refcount == 0);
696 LASSERT(list_empty(&lpni->lpni_txq));
697 LASSERT(list_empty(&lpni->lpni_hashlist));
698 LASSERT(lpni->lpni_txqnob == 0);
699 LASSERT(lpni->lpni_peer_net != NULL);
700 LASSERT(lpni->lpni_peer_net->lpn_peer != NULL);
702 ptable = the_lnet.ln_peer_tables[lpni->lpni_cpt];
703 LASSERT(ptable->pt_number > 0);
706 lpni->lpni_net = NULL;
708 lnet_try_destroy_peer_hierarchy_locked(lpni);
710 LIBCFS_FREE(lpni, sizeof(*lpni));
712 LASSERT(ptable->pt_zombies > 0);
713 ptable->pt_zombies--;
717 lnet_nid2peerni_locked(struct lnet_peer_ni **lpnip, lnet_nid_t nid, int cpt)
719 struct lnet_peer_table *ptable;
720 struct lnet_peer_ni *lpni = NULL;
721 struct lnet_peer_ni *lpni2;
726 if (the_lnet.ln_shutdown) /* it's shutting down */
730 * calculate cpt2 with the standard hash function
731 * This cpt2 becomes the slot where we'll find or create the peer.
733 cpt2 = lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
736 * Any changes to the peer tables happen under exclusive write
737 * lock. Any reads to the peer tables can be done via a standard
740 if (cpt != LNET_LOCK_EX) {
741 lnet_net_unlock(cpt);
742 lnet_net_lock(LNET_LOCK_EX);
745 ptable = the_lnet.ln_peer_tables[cpt2];
746 lpni = lnet_get_peer_ni_locked(ptable, nid);
749 if (cpt != LNET_LOCK_EX) {
750 lnet_net_unlock(LNET_LOCK_EX);
757 * take extra refcount in case another thread has shutdown LNet
758 * and destroyed locks and peer-table before I finish the allocation
761 lnet_net_unlock(LNET_LOCK_EX);
763 LIBCFS_CPT_ALLOC(lpni, lnet_cpt_table(), cpt2, sizeof(*lpni));
771 INIT_LIST_HEAD(&lpni->lpni_txq);
772 INIT_LIST_HEAD(&lpni->lpni_rtrq);
773 INIT_LIST_HEAD(&lpni->lpni_routes);
774 INIT_LIST_HEAD(&lpni->lpni_hashlist);
775 INIT_LIST_HEAD(&lpni->lpni_on_peer_net_list);
776 INIT_LIST_HEAD(&lpni->lpni_on_remote_peer_ni_list);
778 lpni->lpni_alive = !lnet_peers_start_down(); /* 1 bit!! */
779 lpni->lpni_last_alive = cfs_time_current(); /* assumes alive */
780 lpni->lpni_ping_feats = LNET_PING_FEAT_INVAL;
781 lpni->lpni_nid = nid;
782 lpni->lpni_cpt = cpt2;
783 atomic_set(&lpni->lpni_refcount, 2); /* 1 for caller; 1 for hash */
785 rc = lnet_build_peer_hierarchy(lpni);
789 lnet_net_lock(LNET_LOCK_EX);
791 if (the_lnet.ln_shutdown) {
796 lpni2 = lnet_get_peer_ni_locked(ptable, nid);
802 lpni->lpni_net = lnet_get_net_locked(LNET_NIDNET(lpni->lpni_nid));
803 if (lpni->lpni_net) {
804 lpni->lpni_txcredits =
805 lpni->lpni_mintxcredits =
806 lpni->lpni_net->net_tunables.lct_peer_tx_credits;
807 lpni->lpni_rtrcredits =
808 lpni->lpni_minrtrcredits =
809 lnet_peer_buffer_credits(lpni->lpni_net);
812 * if you're adding a peer which is not on a local network
813 * then we can't assign any of the credits. It won't be
814 * picked for sending anyway. Eventually a network can be
815 * added, in this case we need to revisit this peer and
816 * update its credits.
819 CDEBUG(D_NET, "peer_ni %s is not directly connected\n",
820 libcfs_nid2str(nid));
821 /* increment refcount for remote peer list */
822 atomic_inc(&lpni->lpni_refcount);
823 list_add_tail(&lpni->lpni_on_remote_peer_ni_list,
824 &the_lnet.ln_remote_peer_ni_list);
827 lnet_set_peer_ni_health_locked(lpni, true);
829 list_add_tail(&lpni->lpni_hashlist,
830 &ptable->pt_hash[lnet_nid2peerhash(nid)]);
831 ptable->pt_version++;
834 if (cpt != LNET_LOCK_EX) {
835 lnet_net_unlock(LNET_LOCK_EX);
842 lnet_try_destroy_peer_hierarchy_locked(lpni);
843 LIBCFS_FREE(lpni, sizeof(*lpni));
846 if (cpt != LNET_LOCK_EX) {
847 lnet_net_unlock(LNET_LOCK_EX);
854 lnet_debug_peer(lnet_nid_t nid)
856 char *aliveness = "NA";
857 struct lnet_peer_ni *lp;
861 cpt = lnet_cpt_of_nid(nid, NULL);
864 rc = lnet_nid2peerni_locked(&lp, nid, cpt);
866 lnet_net_unlock(cpt);
867 CDEBUG(D_WARNING, "No peer %s\n", libcfs_nid2str(nid));
871 if (lnet_isrouter(lp) || lnet_peer_aliveness_enabled(lp))
872 aliveness = lp->lpni_alive ? "up" : "down";
874 CDEBUG(D_WARNING, "%-24s %4d %5s %5d %5d %5d %5d %5d %ld\n",
875 libcfs_nid2str(lp->lpni_nid), atomic_read(&lp->lpni_refcount),
876 aliveness, lp->lpni_net->net_tunables.lct_peer_tx_credits,
877 lp->lpni_rtrcredits, lp->lpni_minrtrcredits,
878 lp->lpni_txcredits, lp->lpni_mintxcredits, lp->lpni_txqnob);
880 lnet_peer_ni_decref_locked(lp);
882 lnet_net_unlock(cpt);
885 int lnet_get_peer_ni_info(__u32 peer_index, __u64 *nid,
886 char aliveness[LNET_MAX_STR_LEN],
887 __u32 *cpt_iter, __u32 *refcount,
888 __u32 *ni_peer_tx_credits, __u32 *peer_tx_credits,
889 __u32 *peer_rtr_credits, __u32 *peer_min_rtr_credits,
892 struct lnet_peer_table *peer_table;
893 struct lnet_peer_ni *lp;
898 /* get the number of CPTs */
899 lncpt = cfs_percpt_number(the_lnet.ln_peer_tables);
901 /* if the cpt number to be examined is >= the number of cpts in
902 * the system then indicate that there are no more cpts to examin
904 if (*cpt_iter >= lncpt)
907 /* get the current table */
908 peer_table = the_lnet.ln_peer_tables[*cpt_iter];
909 /* if the ptable is NULL then there are no more cpts to examine */
910 if (peer_table == NULL)
913 lnet_net_lock(*cpt_iter);
915 for (j = 0; j < LNET_PEER_HASH_SIZE && !found; j++) {
916 struct list_head *peers = &peer_table->pt_hash[j];
918 list_for_each_entry(lp, peers, lpni_hashlist) {
919 if (peer_index-- > 0)
922 snprintf(aliveness, LNET_MAX_STR_LEN, "NA");
923 if (lnet_isrouter(lp) ||
924 lnet_peer_aliveness_enabled(lp))
925 snprintf(aliveness, LNET_MAX_STR_LEN,
926 lp->lpni_alive ? "up" : "down");
929 *refcount = atomic_read(&lp->lpni_refcount);
930 *ni_peer_tx_credits =
931 lp->lpni_net->net_tunables.lct_peer_tx_credits;
932 *peer_tx_credits = lp->lpni_txcredits;
933 *peer_rtr_credits = lp->lpni_rtrcredits;
934 *peer_min_rtr_credits = lp->lpni_mintxcredits;
935 *peer_tx_qnob = lp->lpni_txqnob;
941 lnet_net_unlock(*cpt_iter);
945 return found ? 0 : -ENOENT;
948 int lnet_get_peer_info(__u32 idx, lnet_nid_t *primary_nid, lnet_nid_t *nid,
949 struct lnet_peer_ni_credit_info *peer_ni_info)
951 struct lnet_peer_ni *lpni = NULL;
952 struct lnet_peer_net *lpn = NULL;
953 struct lnet_peer *lp = NULL;
955 lpni = lnet_get_peer_ni_idx_locked(idx, &lpn, &lp);
960 *primary_nid = lp->lp_primary_nid;
961 *nid = lpni->lpni_nid;
962 snprintf(peer_ni_info->cr_aliveness, LNET_MAX_STR_LEN, "NA");
963 if (lnet_isrouter(lpni) ||
964 lnet_peer_aliveness_enabled(lpni))
965 snprintf(peer_ni_info->cr_aliveness, LNET_MAX_STR_LEN,
966 lpni->lpni_alive ? "up" : "down");
968 peer_ni_info->cr_refcount = atomic_read(&lpni->lpni_refcount);
969 peer_ni_info->cr_ni_peer_tx_credits = (lpni->lpni_net != NULL) ?
970 lpni->lpni_net->net_tunables.lct_peer_tx_credits : 0;
971 peer_ni_info->cr_peer_tx_credits = lpni->lpni_txcredits;
972 peer_ni_info->cr_peer_rtr_credits = lpni->lpni_rtrcredits;
973 peer_ni_info->cr_peer_min_rtr_credits = lpni->lpni_mintxcredits;
974 peer_ni_info->cr_peer_tx_qnob = lpni->lpni_txqnob;