4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2013, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #define DEBUG_SUBSYSTEM S_LNET
38 #include <lnet/lib-lnet.h>
39 #include <lnet/lib-dlc.h>
41 #include <linux/log2.h>
45 #define D_LNI D_CONSOLE
47 #define D_LNI D_CONFIG
50 lnet_t the_lnet; /* THE state of the network */
51 EXPORT_SYMBOL(the_lnet);
55 static char *ip2nets = "";
56 CFS_MODULE_PARM(ip2nets, "s", charp, 0444,
57 "LNET network <- IP table");
59 static char *networks = "";
60 CFS_MODULE_PARM(networks, "s", charp, 0444,
63 static char *routes = "";
64 CFS_MODULE_PARM(routes, "s", charp, 0444,
65 "routes to non-local networks");
67 static int rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT;
68 CFS_MODULE_PARM(rnet_htable_size, "i", int, 0444,
69 "size of remote network hash table");
71 static void lnet_ping_target_fini(void);
72 static int lnet_ping(lnet_process_id_t id, int timeout_ms,
73 lnet_process_id_t *ids, int n_ids);
82 lnet_get_networks(void)
87 if (*networks != 0 && *ip2nets != 0) {
88 LCONSOLE_ERROR_MSG(0x101, "Please specify EITHER 'networks' or "
89 "'ip2nets' but not both at once\n");
94 rc = lnet_parse_ip2nets(&nets, ip2nets);
95 return (rc == 0) ? nets : NULL;
105 lnet_init_locks(void)
107 spin_lock_init(&the_lnet.ln_eq_wait_lock);
108 init_waitqueue_head(&the_lnet.ln_eq_waitq);
109 mutex_init(&the_lnet.ln_lnd_mutex);
110 mutex_init(&the_lnet.ln_api_mutex);
114 lnet_fini_locks(void)
121 lnet_get_routes(void)
123 char *str = getenv("LNET_ROUTES");
125 return (str == NULL) ? "" : str;
129 lnet_get_networks (void)
131 static char default_networks[256];
132 char *networks = getenv("LNET_NETWORKS");
137 struct list_head *tmp;
139 if (networks != NULL)
142 /* In userland, the default 'networks=' is the list of known net types */
143 len = sizeof(default_networks);
144 str = default_networks;
148 list_for_each(tmp, &the_lnet.ln_lnds) {
149 lnd_t *lnd = list_entry(tmp, lnd_t, lnd_list);
151 nob = snprintf(str, len, "%s%s", sep,
152 libcfs_lnd2str(lnd->lnd_type));
154 /* overflowed the string; leave it where it was */
163 return default_networks;
166 # ifndef HAVE_LIBPTHREAD
168 static void lnet_init_locks(void)
170 the_lnet.ln_eq_wait_lock = 0;
171 the_lnet.ln_lnd_mutex = 0;
172 the_lnet.ln_api_mutex = 0;
175 static void lnet_fini_locks(void)
177 LASSERT(the_lnet.ln_api_mutex == 0);
178 LASSERT(the_lnet.ln_lnd_mutex == 0);
179 LASSERT(the_lnet.ln_eq_wait_lock == 0);
184 static void lnet_init_locks(void)
186 pthread_cond_init(&the_lnet.ln_eq_cond, NULL);
187 pthread_mutex_init(&the_lnet.ln_eq_wait_lock, NULL);
188 pthread_mutex_init(&the_lnet.ln_lnd_mutex, NULL);
189 pthread_mutex_init(&the_lnet.ln_api_mutex, NULL);
192 static void lnet_fini_locks(void)
194 pthread_mutex_destroy(&the_lnet.ln_api_mutex);
195 pthread_mutex_destroy(&the_lnet.ln_lnd_mutex);
196 pthread_mutex_destroy(&the_lnet.ln_eq_wait_lock);
197 pthread_cond_destroy(&the_lnet.ln_eq_cond);
204 lnet_create_remote_nets_table(void)
207 struct list_head *hash;
209 LASSERT(the_lnet.ln_remote_nets_hash == NULL);
210 LASSERT(the_lnet.ln_remote_nets_hbits > 0);
211 LIBCFS_ALLOC(hash, LNET_REMOTE_NETS_HASH_SIZE * sizeof(*hash));
213 CERROR("Failed to create remote nets hash table\n");
217 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++)
218 INIT_LIST_HEAD(&hash[i]);
219 the_lnet.ln_remote_nets_hash = hash;
224 lnet_destroy_remote_nets_table(void)
228 if (the_lnet.ln_remote_nets_hash == NULL)
231 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++)
232 LASSERT(list_empty(&the_lnet.ln_remote_nets_hash[i]));
234 LIBCFS_FREE(the_lnet.ln_remote_nets_hash,
235 LNET_REMOTE_NETS_HASH_SIZE *
236 sizeof(the_lnet.ln_remote_nets_hash[0]));
237 the_lnet.ln_remote_nets_hash = NULL;
241 lnet_destroy_locks(void)
243 if (the_lnet.ln_res_lock != NULL) {
244 cfs_percpt_lock_free(the_lnet.ln_res_lock);
245 the_lnet.ln_res_lock = NULL;
248 if (the_lnet.ln_net_lock != NULL) {
249 cfs_percpt_lock_free(the_lnet.ln_net_lock);
250 the_lnet.ln_net_lock = NULL;
257 lnet_create_locks(void)
261 the_lnet.ln_res_lock = cfs_percpt_lock_alloc(lnet_cpt_table());
262 if (the_lnet.ln_res_lock == NULL)
265 the_lnet.ln_net_lock = cfs_percpt_lock_alloc(lnet_cpt_table());
266 if (the_lnet.ln_net_lock == NULL)
272 lnet_destroy_locks();
276 static void lnet_assert_wire_constants(void)
278 /* Wire protocol assertions generated by 'wirecheck'
279 * running on Linux robert.bartonsoftware.com 2.6.8-1.521
280 * #1 Mon Aug 16 09:01:18 EDT 2004 i686 athlon i386 GNU/Linux
281 * with gcc version 3.3.3 20040412 (Red Hat Linux 3.3.3-7) */
284 CLASSERT (LNET_PROTO_TCP_MAGIC == 0xeebc0ded);
285 CLASSERT (LNET_PROTO_TCP_VERSION_MAJOR == 1);
286 CLASSERT (LNET_PROTO_TCP_VERSION_MINOR == 0);
287 CLASSERT (LNET_MSG_ACK == 0);
288 CLASSERT (LNET_MSG_PUT == 1);
289 CLASSERT (LNET_MSG_GET == 2);
290 CLASSERT (LNET_MSG_REPLY == 3);
291 CLASSERT (LNET_MSG_HELLO == 4);
293 /* Checks for struct ptl_handle_wire_t */
294 CLASSERT ((int)sizeof(lnet_handle_wire_t) == 16);
295 CLASSERT ((int)offsetof(lnet_handle_wire_t, wh_interface_cookie) == 0);
296 CLASSERT ((int)sizeof(((lnet_handle_wire_t *)0)->wh_interface_cookie) == 8);
297 CLASSERT ((int)offsetof(lnet_handle_wire_t, wh_object_cookie) == 8);
298 CLASSERT ((int)sizeof(((lnet_handle_wire_t *)0)->wh_object_cookie) == 8);
300 /* Checks for struct lnet_magicversion_t */
301 CLASSERT ((int)sizeof(lnet_magicversion_t) == 8);
302 CLASSERT ((int)offsetof(lnet_magicversion_t, magic) == 0);
303 CLASSERT ((int)sizeof(((lnet_magicversion_t *)0)->magic) == 4);
304 CLASSERT ((int)offsetof(lnet_magicversion_t, version_major) == 4);
305 CLASSERT ((int)sizeof(((lnet_magicversion_t *)0)->version_major) == 2);
306 CLASSERT ((int)offsetof(lnet_magicversion_t, version_minor) == 6);
307 CLASSERT ((int)sizeof(((lnet_magicversion_t *)0)->version_minor) == 2);
309 /* Checks for struct lnet_hdr_t */
310 CLASSERT ((int)sizeof(lnet_hdr_t) == 72);
311 CLASSERT ((int)offsetof(lnet_hdr_t, dest_nid) == 0);
312 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->dest_nid) == 8);
313 CLASSERT ((int)offsetof(lnet_hdr_t, src_nid) == 8);
314 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->src_nid) == 8);
315 CLASSERT ((int)offsetof(lnet_hdr_t, dest_pid) == 16);
316 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->dest_pid) == 4);
317 CLASSERT ((int)offsetof(lnet_hdr_t, src_pid) == 20);
318 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->src_pid) == 4);
319 CLASSERT ((int)offsetof(lnet_hdr_t, type) == 24);
320 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->type) == 4);
321 CLASSERT ((int)offsetof(lnet_hdr_t, payload_length) == 28);
322 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->payload_length) == 4);
323 CLASSERT ((int)offsetof(lnet_hdr_t, msg) == 32);
324 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg) == 40);
327 CLASSERT ((int)offsetof(lnet_hdr_t, msg.ack.dst_wmd) == 32);
328 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.ack.dst_wmd) == 16);
329 CLASSERT ((int)offsetof(lnet_hdr_t, msg.ack.match_bits) == 48);
330 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.ack.match_bits) == 8);
331 CLASSERT ((int)offsetof(lnet_hdr_t, msg.ack.mlength) == 56);
332 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.ack.mlength) == 4);
335 CLASSERT ((int)offsetof(lnet_hdr_t, msg.put.ack_wmd) == 32);
336 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.put.ack_wmd) == 16);
337 CLASSERT ((int)offsetof(lnet_hdr_t, msg.put.match_bits) == 48);
338 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.put.match_bits) == 8);
339 CLASSERT ((int)offsetof(lnet_hdr_t, msg.put.hdr_data) == 56);
340 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.put.hdr_data) == 8);
341 CLASSERT ((int)offsetof(lnet_hdr_t, msg.put.ptl_index) == 64);
342 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.put.ptl_index) == 4);
343 CLASSERT ((int)offsetof(lnet_hdr_t, msg.put.offset) == 68);
344 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.put.offset) == 4);
347 CLASSERT ((int)offsetof(lnet_hdr_t, msg.get.return_wmd) == 32);
348 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.get.return_wmd) == 16);
349 CLASSERT ((int)offsetof(lnet_hdr_t, msg.get.match_bits) == 48);
350 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.get.match_bits) == 8);
351 CLASSERT ((int)offsetof(lnet_hdr_t, msg.get.ptl_index) == 56);
352 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.get.ptl_index) == 4);
353 CLASSERT ((int)offsetof(lnet_hdr_t, msg.get.src_offset) == 60);
354 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.get.src_offset) == 4);
355 CLASSERT ((int)offsetof(lnet_hdr_t, msg.get.sink_length) == 64);
356 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.get.sink_length) == 4);
359 CLASSERT ((int)offsetof(lnet_hdr_t, msg.reply.dst_wmd) == 32);
360 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.reply.dst_wmd) == 16);
363 CLASSERT ((int)offsetof(lnet_hdr_t, msg.hello.incarnation) == 32);
364 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.hello.incarnation) == 8);
365 CLASSERT ((int)offsetof(lnet_hdr_t, msg.hello.type) == 40);
366 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.hello.type) == 4);
370 lnet_find_lnd_by_type (int type)
373 struct list_head *tmp;
375 /* holding lnd mutex */
376 list_for_each(tmp, &the_lnet.ln_lnds) {
377 lnd = list_entry(tmp, lnd_t, lnd_list);
379 if ((int)lnd->lnd_type == type)
386 lnet_register_lnd (lnd_t *lnd)
388 LNET_MUTEX_LOCK(&the_lnet.ln_lnd_mutex);
390 LASSERT(the_lnet.ln_init);
391 LASSERT(libcfs_isknown_lnd(lnd->lnd_type));
392 LASSERT(lnet_find_lnd_by_type(lnd->lnd_type) == NULL);
394 list_add_tail(&lnd->lnd_list, &the_lnet.ln_lnds);
395 lnd->lnd_refcount = 0;
397 CDEBUG(D_NET, "%s LND registered\n", libcfs_lnd2str(lnd->lnd_type));
399 LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
401 EXPORT_SYMBOL(lnet_register_lnd);
404 lnet_unregister_lnd (lnd_t *lnd)
406 LNET_MUTEX_LOCK(&the_lnet.ln_lnd_mutex);
408 LASSERT(the_lnet.ln_init);
409 LASSERT(lnet_find_lnd_by_type(lnd->lnd_type) == lnd);
410 LASSERT(lnd->lnd_refcount == 0);
412 list_del(&lnd->lnd_list);
413 CDEBUG(D_NET, "%s LND unregistered\n", libcfs_lnd2str(lnd->lnd_type));
415 LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
417 EXPORT_SYMBOL(lnet_unregister_lnd);
420 lnet_counters_get(lnet_counters_t *counters)
422 lnet_counters_t *ctr;
425 memset(counters, 0, sizeof(*counters));
427 lnet_net_lock(LNET_LOCK_EX);
429 cfs_percpt_for_each(ctr, i, the_lnet.ln_counters) {
430 counters->msgs_max += ctr->msgs_max;
431 counters->msgs_alloc += ctr->msgs_alloc;
432 counters->errors += ctr->errors;
433 counters->send_count += ctr->send_count;
434 counters->recv_count += ctr->recv_count;
435 counters->route_count += ctr->route_count;
436 counters->drop_count += ctr->drop_count;
437 counters->send_length += ctr->send_length;
438 counters->recv_length += ctr->recv_length;
439 counters->route_length += ctr->route_length;
440 counters->drop_length += ctr->drop_length;
443 lnet_net_unlock(LNET_LOCK_EX);
445 EXPORT_SYMBOL(lnet_counters_get);
448 lnet_counters_reset(void)
450 lnet_counters_t *counters;
453 lnet_net_lock(LNET_LOCK_EX);
455 cfs_percpt_for_each(counters, i, the_lnet.ln_counters)
456 memset(counters, 0, sizeof(lnet_counters_t));
458 lnet_net_unlock(LNET_LOCK_EX);
460 EXPORT_SYMBOL(lnet_counters_reset);
462 #ifdef LNET_USE_LIB_FREELIST
465 lnet_freelist_init(lnet_freelist_t *fl, int n, int size)
471 size += offsetof (lnet_freeobj_t, fo_contents);
473 LIBCFS_ALLOC(space, n * size);
477 INIT_LIST_HEAD(&fl->fl_list);
480 fl->fl_objsize = size;
483 list_add((struct list_head *)space, &fl->fl_list);
491 lnet_freelist_fini(lnet_freelist_t *fl)
493 struct list_head *el;
496 if (fl->fl_nobjs == 0)
500 for (el = fl->fl_list.next; el != &fl->fl_list; el = el->next)
503 LASSERT (count == fl->fl_nobjs);
505 LIBCFS_FREE(fl->fl_objs, fl->fl_nobjs * fl->fl_objsize);
506 memset (fl, 0, sizeof (*fl));
509 #endif /* LNET_USE_LIB_FREELIST */
511 static __u64 lnet_create_interface_cookie(void)
513 /* NB the interface cookie in wire handles guards against delayed
514 * replies and ACKs appearing valid after reboot. Initialisation time,
515 * even if it's only implemented to millisecond resolution is probably
516 * easily good enough. */
520 int rc = gettimeofday (&tv, NULL);
523 do_gettimeofday(&tv);
527 cookie += tv.tv_usec;
532 lnet_res_type2str(int type)
537 case LNET_COOKIE_TYPE_MD:
539 case LNET_COOKIE_TYPE_ME:
541 case LNET_COOKIE_TYPE_EQ:
547 lnet_res_container_cleanup(struct lnet_res_container *rec)
551 if (rec->rec_type == 0) /* not set yet, it's uninitialized */
554 while (!list_empty(&rec->rec_active)) {
555 struct list_head *e = rec->rec_active.next;
558 if (rec->rec_type == LNET_COOKIE_TYPE_EQ) {
559 lnet_eq_free(list_entry(e, lnet_eq_t, eq_list));
561 } else if (rec->rec_type == LNET_COOKIE_TYPE_MD) {
562 lnet_md_free(list_entry(e, lnet_libmd_t, md_list));
564 } else { /* NB: Active MEs should be attached on portals */
571 /* Found alive MD/ME/EQ, user really should unlink/free
572 * all of them before finalize LNet, but if someone didn't,
573 * we have to recycle garbage for him */
574 CERROR("%d active elements on exit of %s container\n",
575 count, lnet_res_type2str(rec->rec_type));
578 #ifdef LNET_USE_LIB_FREELIST
579 lnet_freelist_fini(&rec->rec_freelist);
581 if (rec->rec_lh_hash != NULL) {
582 LIBCFS_FREE(rec->rec_lh_hash,
583 LNET_LH_HASH_SIZE * sizeof(rec->rec_lh_hash[0]));
584 rec->rec_lh_hash = NULL;
587 rec->rec_type = 0; /* mark it as finalized */
591 lnet_res_container_setup(struct lnet_res_container *rec,
592 int cpt, int type, int objnum, int objsz)
597 LASSERT(rec->rec_type == 0);
599 rec->rec_type = type;
600 INIT_LIST_HEAD(&rec->rec_active);
602 #ifdef LNET_USE_LIB_FREELIST
603 memset(&rec->rec_freelist, 0, sizeof(rec->rec_freelist));
604 rc = lnet_freelist_init(&rec->rec_freelist, objnum, objsz);
608 rec->rec_lh_cookie = (cpt << LNET_COOKIE_TYPE_BITS) | type;
610 /* Arbitrary choice of hash table size */
611 LIBCFS_CPT_ALLOC(rec->rec_lh_hash, lnet_cpt_table(), cpt,
612 LNET_LH_HASH_SIZE * sizeof(rec->rec_lh_hash[0]));
613 if (rec->rec_lh_hash == NULL) {
618 for (i = 0; i < LNET_LH_HASH_SIZE; i++)
619 INIT_LIST_HEAD(&rec->rec_lh_hash[i]);
624 CERROR("Failed to setup %s resource container\n",
625 lnet_res_type2str(type));
626 lnet_res_container_cleanup(rec);
631 lnet_res_containers_destroy(struct lnet_res_container **recs)
633 struct lnet_res_container *rec;
636 cfs_percpt_for_each(rec, i, recs)
637 lnet_res_container_cleanup(rec);
639 cfs_percpt_free(recs);
642 static struct lnet_res_container **
643 lnet_res_containers_create(int type, int objnum, int objsz)
645 struct lnet_res_container **recs;
646 struct lnet_res_container *rec;
650 recs = cfs_percpt_alloc(lnet_cpt_table(), sizeof(*rec));
652 CERROR("Failed to allocate %s resource containers\n",
653 lnet_res_type2str(type));
657 cfs_percpt_for_each(rec, i, recs) {
658 rc = lnet_res_container_setup(rec, i, type, objnum, objsz);
660 lnet_res_containers_destroy(recs);
669 lnet_res_lh_lookup(struct lnet_res_container *rec, __u64 cookie)
671 /* ALWAYS called with lnet_res_lock held */
672 struct list_head *head;
673 lnet_libhandle_t *lh;
676 if ((cookie & LNET_COOKIE_MASK) != rec->rec_type)
679 hash = cookie >> (LNET_COOKIE_TYPE_BITS + LNET_CPT_BITS);
680 head = &rec->rec_lh_hash[hash & LNET_LH_HASH_MASK];
682 list_for_each_entry(lh, head, lh_hash_chain) {
683 if (lh->lh_cookie == cookie)
691 lnet_res_lh_initialize(struct lnet_res_container *rec, lnet_libhandle_t *lh)
693 /* ALWAYS called with lnet_res_lock held */
694 unsigned int ibits = LNET_COOKIE_TYPE_BITS + LNET_CPT_BITS;
697 lh->lh_cookie = rec->rec_lh_cookie;
698 rec->rec_lh_cookie += 1 << ibits;
700 hash = (lh->lh_cookie >> ibits) & LNET_LH_HASH_MASK;
702 list_add(&lh->lh_hash_chain, &rec->rec_lh_hash[hash]);
707 * Reserved API - do not use.
708 * Temporary workaround to allow uOSS and test programs force server
709 * mode in userspace. See comments near ln_server_mode_flag in
710 * lnet/lib-types.h */
714 the_lnet.ln_server_mode_flag = 1;
718 static int lnet_unprepare(void);
721 lnet_prepare(lnet_pid_t requested_pid)
723 /* Prepare to bring up the network */
724 struct lnet_res_container **recs;
727 if (requested_pid == LNET_PID_ANY) {
728 /* Don't instantiate LNET just for me */
732 LASSERT (the_lnet.ln_refcount == 0);
734 the_lnet.ln_routing = 0;
737 LASSERT ((requested_pid & LNET_PID_USERFLAG) == 0);
738 the_lnet.ln_pid = requested_pid;
740 if (the_lnet.ln_server_mode_flag) {/* server case (uOSS) */
741 LASSERT ((requested_pid & LNET_PID_USERFLAG) == 0);
743 if (current_uid() != 0) /* Only root can run user-space server */
745 the_lnet.ln_pid = requested_pid;
747 } else {/* client case (liblustre) */
749 /* My PID must be unique on this node and flag I'm userspace */
750 the_lnet.ln_pid = getpid() | LNET_PID_USERFLAG;
754 INIT_LIST_HEAD(&the_lnet.ln_test_peers);
755 INIT_LIST_HEAD(&the_lnet.ln_nis);
756 INIT_LIST_HEAD(&the_lnet.ln_nis_cpt);
757 INIT_LIST_HEAD(&the_lnet.ln_nis_zombie);
758 INIT_LIST_HEAD(&the_lnet.ln_routers);
760 rc = lnet_create_remote_nets_table();
764 the_lnet.ln_interface_cookie = lnet_create_interface_cookie();
766 the_lnet.ln_counters = cfs_percpt_alloc(lnet_cpt_table(),
767 sizeof(lnet_counters_t));
768 if (the_lnet.ln_counters == NULL) {
769 CERROR("Failed to allocate counters for LNet\n");
774 rc = lnet_peer_tables_create();
778 rc = lnet_msg_containers_create();
782 rc = lnet_res_container_setup(&the_lnet.ln_eq_container, 0,
783 LNET_COOKIE_TYPE_EQ, LNET_FL_MAX_EQS,
788 recs = lnet_res_containers_create(LNET_COOKIE_TYPE_ME, LNET_FL_MAX_MES,
793 the_lnet.ln_me_containers = recs;
795 recs = lnet_res_containers_create(LNET_COOKIE_TYPE_MD, LNET_FL_MAX_MDS,
796 sizeof(lnet_libmd_t));
800 the_lnet.ln_md_containers = recs;
802 rc = lnet_portals_create();
804 CERROR("Failed to create portals for LNet: %d\n", rc);
816 lnet_unprepare (void)
818 /* NB no LNET_LOCK since this is the last reference. All LND instances
819 * have shut down already, so it is safe to unlink and free all
820 * descriptors, even those that appear committed to a network op (eg MD
821 * with non-zero pending count) */
823 lnet_fail_nid(LNET_NID_ANY, 0);
825 LASSERT(the_lnet.ln_refcount == 0);
826 LASSERT(list_empty(&the_lnet.ln_test_peers));
827 LASSERT(list_empty(&the_lnet.ln_nis));
828 LASSERT(list_empty(&the_lnet.ln_nis_cpt));
829 LASSERT(list_empty(&the_lnet.ln_nis_zombie));
831 lnet_portals_destroy();
833 if (the_lnet.ln_md_containers != NULL) {
834 lnet_res_containers_destroy(the_lnet.ln_md_containers);
835 the_lnet.ln_md_containers = NULL;
838 if (the_lnet.ln_me_containers != NULL) {
839 lnet_res_containers_destroy(the_lnet.ln_me_containers);
840 the_lnet.ln_me_containers = NULL;
843 lnet_res_container_cleanup(&the_lnet.ln_eq_container);
845 lnet_msg_containers_destroy();
846 lnet_peer_tables_destroy();
847 lnet_rtrpools_free(0);
849 if (the_lnet.ln_counters != NULL) {
850 cfs_percpt_free(the_lnet.ln_counters);
851 the_lnet.ln_counters = NULL;
853 lnet_destroy_remote_nets_table();
859 lnet_net2ni_locked(__u32 net, int cpt)
861 struct list_head *tmp;
864 LASSERT(cpt != LNET_LOCK_EX);
866 list_for_each(tmp, &the_lnet.ln_nis) {
867 ni = list_entry(tmp, lnet_ni_t, ni_list);
869 if (LNET_NIDNET(ni->ni_nid) == net) {
870 lnet_ni_addref_locked(ni, cpt);
879 lnet_net2ni(__u32 net)
884 ni = lnet_net2ni_locked(net, 0);
889 EXPORT_SYMBOL(lnet_net2ni);
892 lnet_nid_cpt_hash(lnet_nid_t nid, unsigned int number)
897 LASSERT(number >= 1 && number <= LNET_CPT_NUMBER);
902 val = hash_long(key, LNET_CPT_BITS);
903 /* NB: LNET_CP_NUMBER doesn't have to be PO2 */
907 return (unsigned int)(key + val + (val >> 1)) % number;
911 lnet_cpt_of_nid_locked(lnet_nid_t nid)
915 /* must called with hold of lnet_net_lock */
916 if (LNET_CPT_NUMBER == 1)
917 return 0; /* the only one */
919 /* take lnet_net_lock(any) would be OK */
920 if (!list_empty(&the_lnet.ln_nis_cpt)) {
921 list_for_each_entry(ni, &the_lnet.ln_nis_cpt, ni_cptlist) {
922 if (LNET_NIDNET(ni->ni_nid) != LNET_NIDNET(nid))
925 LASSERT(ni->ni_cpts != NULL);
926 return ni->ni_cpts[lnet_nid_cpt_hash
927 (nid, ni->ni_ncpts)];
931 return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
935 lnet_cpt_of_nid(lnet_nid_t nid)
940 if (LNET_CPT_NUMBER == 1)
941 return 0; /* the only one */
943 if (list_empty(&the_lnet.ln_nis_cpt))
944 return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
946 cpt = lnet_net_lock_current();
947 cpt2 = lnet_cpt_of_nid_locked(nid);
948 lnet_net_unlock(cpt);
952 EXPORT_SYMBOL(lnet_cpt_of_nid);
955 lnet_islocalnet(__u32 net)
960 cpt = lnet_net_lock_current();
962 ni = lnet_net2ni_locked(net, cpt);
964 lnet_ni_decref_locked(ni, cpt);
966 lnet_net_unlock(cpt);
972 lnet_nid2ni_locked(lnet_nid_t nid, int cpt)
975 struct list_head *tmp;
977 LASSERT(cpt != LNET_LOCK_EX);
979 list_for_each(tmp, &the_lnet.ln_nis) {
980 ni = list_entry(tmp, lnet_ni_t, ni_list);
982 if (ni->ni_nid == nid) {
983 lnet_ni_addref_locked(ni, cpt);
992 lnet_islocalnid(lnet_nid_t nid)
997 cpt = lnet_net_lock_current();
998 ni = lnet_nid2ni_locked(nid, cpt);
1000 lnet_ni_decref_locked(ni, cpt);
1001 lnet_net_unlock(cpt);
1007 lnet_count_acceptor_nis (void)
1009 /* Return the # of NIs that need the acceptor. */
1011 #if defined(__KERNEL__) || defined(HAVE_LIBPTHREAD)
1012 struct list_head *tmp;
1016 cpt = lnet_net_lock_current();
1017 list_for_each(tmp, &the_lnet.ln_nis) {
1018 ni = list_entry(tmp, lnet_ni_t, ni_list);
1020 if (ni->ni_lnd->lnd_accept != NULL)
1024 lnet_net_unlock(cpt);
1026 #endif /* defined(__KERNEL__) || defined(HAVE_LIBPTHREAD) */
1030 static lnet_ping_info_t *
1031 lnet_ping_info_create(int num_ni)
1033 lnet_ping_info_t *ping_info;
1034 unsigned int infosz;
1036 infosz = offsetof(lnet_ping_info_t, pi_ni[num_ni]);
1037 LIBCFS_ALLOC(ping_info, infosz);
1038 if (ping_info == NULL) {
1039 CERROR("Can't allocate ping info[%d]\n", num_ni);
1043 ping_info->pi_nnis = num_ni;
1044 ping_info->pi_pid = the_lnet.ln_pid;
1045 ping_info->pi_magic = LNET_PROTO_PING_MAGIC;
1046 ping_info->pi_features = LNET_PING_FEAT_NI_STATUS;
1052 lnet_get_ni_count(void)
1059 list_for_each_entry(ni, &the_lnet.ln_nis, ni_list)
1068 lnet_ping_info_free(lnet_ping_info_t *pinfo)
1071 offsetof(lnet_ping_info_t,
1072 pi_ni[pinfo->pi_nnis]));
1076 lnet_ping_info_destroy(void)
1080 lnet_net_lock(LNET_LOCK_EX);
1082 list_for_each_entry(ni, &the_lnet.ln_nis, ni_list) {
1084 ni->ni_status = NULL;
1088 lnet_ping_info_free(the_lnet.ln_ping_info);
1089 the_lnet.ln_ping_info = NULL;
1091 lnet_net_unlock(LNET_LOCK_EX);
1095 lnet_ping_event_handler(lnet_event_t *event)
1097 lnet_ping_info_t *pinfo = event->md.user_ptr;
1099 if (event->unlinked)
1100 pinfo->pi_features = LNET_PING_FEAT_INVAL;
1104 lnet_ping_info_setup(lnet_ping_info_t **ppinfo, lnet_handle_md_t *md_handle,
1105 int ni_count, bool set_eq)
1107 lnet_handle_me_t me_handle;
1108 lnet_process_id_t id = {LNET_NID_ANY, LNET_PID_ANY};
1113 rc = LNetEQAlloc(0, lnet_ping_event_handler,
1114 &the_lnet.ln_ping_target_eq);
1116 CERROR("Can't allocate ping EQ: %d\n", rc);
1121 *ppinfo = lnet_ping_info_create(ni_count);
1122 if (*ppinfo == NULL) {
1127 rc = LNetMEAttach(LNET_RESERVED_PORTAL, id,
1128 LNET_PROTO_PING_MATCHBITS, 0,
1129 LNET_UNLINK, LNET_INS_AFTER,
1132 CERROR("Can't create ping ME: %d\n", rc);
1136 /* initialize md content */
1138 md.length = offsetof(lnet_ping_info_t,
1139 pi_ni[(*ppinfo)->pi_nnis]);
1140 md.threshold = LNET_MD_THRESH_INF;
1142 md.options = LNET_MD_OP_GET | LNET_MD_TRUNCATE |
1143 LNET_MD_MANAGE_REMOTE;
1145 md.eq_handle = the_lnet.ln_ping_target_eq;
1146 md.user_ptr = *ppinfo;
1148 rc = LNetMDAttach(me_handle, md, LNET_RETAIN, md_handle);
1150 CERROR("Can't attach ping MD: %d\n", rc);
1157 rc2 = LNetMEUnlink(me_handle);
1160 lnet_ping_info_free(*ppinfo);
1164 LNetEQFree(the_lnet.ln_ping_target_eq);
1169 lnet_ping_md_unlink(lnet_ping_info_t *pinfo, lnet_handle_md_t *md_handle)
1171 sigset_t blocked = cfs_block_allsigs();
1173 LNetMDUnlink(*md_handle);
1174 LNetInvalidateHandle(md_handle);
1176 /* NB md could be busy; this just starts the unlink */
1177 while (pinfo->pi_features != LNET_PING_FEAT_INVAL) {
1178 CDEBUG(D_NET, "Still waiting for ping MD to unlink\n");
1179 cfs_pause(cfs_time_seconds(1));
1182 cfs_restore_sigs(blocked);
1186 lnet_ping_info_install_locked(lnet_ping_info_t *ping_info)
1190 lnet_ni_status_t *ns;
1193 list_for_each_entry(ni, &the_lnet.ln_nis, ni_list) {
1194 LASSERT(i < ping_info->pi_nnis);
1196 ns = &ping_info->pi_ni[i];
1198 ns->ns_nid = ni->ni_nid;
1201 ns->ns_status = (ni->ni_status != NULL) ?
1202 ni->ni_status->ns_status : LNET_NI_STATUS_UP;
1211 lnet_ping_target_update(lnet_ping_info_t *pinfo, lnet_handle_md_t md_handle)
1213 lnet_ping_info_t *old_pinfo = NULL;
1214 lnet_handle_md_t old_md;
1216 /* switch the NIs to point to the new ping info created */
1217 lnet_net_lock(LNET_LOCK_EX);
1219 if (!the_lnet.ln_routing)
1220 pinfo->pi_features |= LNET_PING_FEAT_RTE_DISABLED;
1221 lnet_ping_info_install_locked(pinfo);
1223 if (the_lnet.ln_ping_info != NULL) {
1224 old_pinfo = the_lnet.ln_ping_info;
1225 old_md = the_lnet.ln_ping_target_md;
1227 the_lnet.ln_ping_target_md = md_handle;
1228 the_lnet.ln_ping_info = pinfo;
1230 lnet_net_unlock(LNET_LOCK_EX);
1232 if (old_pinfo != NULL) {
1233 /* unlink the old ping info */
1234 lnet_ping_md_unlink(old_pinfo, &old_md);
1235 lnet_ping_info_free(old_pinfo);
1240 lnet_ping_target_fini(void)
1244 lnet_ping_md_unlink(the_lnet.ln_ping_info,
1245 &the_lnet.ln_ping_target_md);
1247 rc = LNetEQFree(the_lnet.ln_ping_target_eq);
1250 lnet_ping_info_destroy();
1254 lnet_ni_tq_credits(lnet_ni_t *ni)
1258 LASSERT(ni->ni_ncpts >= 1);
1260 if (ni->ni_ncpts == 1)
1261 return ni->ni_maxtxcredits;
1263 credits = ni->ni_maxtxcredits / ni->ni_ncpts;
1264 credits = max(credits, 8 * ni->ni_peertxcredits);
1265 credits = min(credits, ni->ni_maxtxcredits);
1271 lnet_clear_zombies_nis_locked(void)
1277 /* Now wait for the NI's I just nuked to show up on ln_zombie_nis
1278 * and shut them down in guaranteed thread context */
1280 while (!list_empty(&the_lnet.ln_nis_zombie)) {
1284 ni = list_entry(the_lnet.ln_nis_zombie.next,
1285 lnet_ni_t, ni_list);
1286 list_del_init(&ni->ni_list);
1287 cfs_percpt_for_each(ref, j, ni->ni_refs) {
1290 /* still busy, add it back to zombie list */
1291 list_add(&ni->ni_list, &the_lnet.ln_nis_zombie);
1295 if (!list_empty(&ni->ni_list)) {
1296 lnet_net_unlock(LNET_LOCK_EX);
1298 if ((i & (-i)) == i) {
1300 "Waiting for zombie LNI %s\n",
1301 libcfs_nid2str(ni->ni_nid));
1303 cfs_pause(cfs_time_seconds(1));
1304 lnet_net_lock(LNET_LOCK_EX);
1308 ni->ni_lnd->lnd_refcount--;
1309 lnet_net_unlock(LNET_LOCK_EX);
1311 islo = ni->ni_lnd->lnd_type == LOLND;
1313 LASSERT(!in_interrupt());
1314 (ni->ni_lnd->lnd_shutdown)(ni);
1316 /* can't deref lnd anymore now; it might have unregistered
1320 CDEBUG(D_LNI, "Removed LNI %s\n",
1321 libcfs_nid2str(ni->ni_nid));
1325 lnet_net_lock(LNET_LOCK_EX);
1330 lnet_shutdown_lndnis(void)
1335 /* NB called holding the global mutex */
1337 /* All quiet on the API front */
1338 LASSERT(!the_lnet.ln_shutdown);
1339 LASSERT(the_lnet.ln_refcount == 0);
1340 LASSERT(list_empty(&the_lnet.ln_nis_zombie));
1342 lnet_net_lock(LNET_LOCK_EX);
1343 the_lnet.ln_shutdown = 1; /* flag shutdown */
1345 /* Unlink NIs from the global table */
1346 while (!list_empty(&the_lnet.ln_nis)) {
1347 ni = list_entry(the_lnet.ln_nis.next,
1348 lnet_ni_t, ni_list);
1349 /* move it to zombie list and nobody can find it anymore */
1350 list_move(&ni->ni_list, &the_lnet.ln_nis_zombie);
1351 lnet_ni_decref_locked(ni, 0); /* drop ln_nis' ref */
1353 if (!list_empty(&ni->ni_cptlist)) {
1354 list_del_init(&ni->ni_cptlist);
1355 lnet_ni_decref_locked(ni, 0);
1359 /* Drop the cached eqwait NI. */
1360 if (the_lnet.ln_eq_waitni != NULL) {
1361 lnet_ni_decref_locked(the_lnet.ln_eq_waitni, 0);
1362 the_lnet.ln_eq_waitni = NULL;
1365 /* Drop the cached loopback NI. */
1366 if (the_lnet.ln_loni != NULL) {
1367 lnet_ni_decref_locked(the_lnet.ln_loni, 0);
1368 the_lnet.ln_loni = NULL;
1371 lnet_net_unlock(LNET_LOCK_EX);
1373 /* Clear lazy portals and drop delayed messages which hold refs
1374 * on their lnet_msg_t::msg_rxpeer */
1375 for (i = 0; i < the_lnet.ln_nportals; i++)
1376 LNetClearLazyPortal(i);
1378 /* Clear the peer table and wait for all peers to go (they hold refs on
1380 lnet_peer_tables_cleanup(NULL);
1382 lnet_net_lock(LNET_LOCK_EX);
1384 lnet_clear_zombies_nis_locked();
1385 the_lnet.ln_shutdown = 0;
1386 lnet_net_unlock(LNET_LOCK_EX);
1390 lnet_shutdown_lndni(__u32 net)
1392 lnet_ping_info_t *pinfo;
1393 lnet_handle_md_t md_handle;
1394 lnet_ni_t *found_ni = NULL;
1398 if (LNET_NETTYP(net) == LOLND)
1401 ni_count = lnet_get_ni_count();
1403 /* create and link a new ping info, before removing the old one */
1404 rc = lnet_ping_info_setup(&pinfo, &md_handle, ni_count - 1, false);
1408 /* proceed with shutting down the NI */
1409 lnet_net_lock(LNET_LOCK_EX);
1411 found_ni = lnet_net2ni_locked(net, 0);
1412 if (found_ni == NULL) {
1413 lnet_net_unlock(LNET_LOCK_EX);
1414 lnet_ping_md_unlink(pinfo, &md_handle);
1415 lnet_ping_info_free(pinfo);
1419 /* decrement the reference counter on found_ni which was
1420 * incremented when we called lnet_net2ni_locked() */
1421 lnet_ni_decref_locked(found_ni, 0);
1423 /* Move ni to zombie list so nobody can find it anymore */
1424 list_move(&found_ni->ni_list, &the_lnet.ln_nis_zombie);
1426 /* Drop the lock reference for the ln_nis ref. */
1427 lnet_ni_decref_locked(found_ni, 0);
1429 if (!list_empty(&found_ni->ni_cptlist)) {
1430 list_del_init(&found_ni->ni_cptlist);
1431 lnet_ni_decref_locked(found_ni, 0);
1434 lnet_net_unlock(LNET_LOCK_EX);
1436 /* Do peer table cleanup for this ni */
1437 lnet_peer_tables_cleanup(found_ni);
1439 lnet_net_lock(LNET_LOCK_EX);
1440 lnet_clear_zombies_nis_locked();
1441 lnet_net_unlock(LNET_LOCK_EX);
1443 lnet_ping_target_update(pinfo, md_handle);
1449 lnet_startup_lndnis(struct list_head *nilist, __s32 peer_timeout,
1450 __s32 peer_cr, __s32 peer_buf_cr, __s32 credits,
1457 struct lnet_tx_queue *tq;
1460 while (!list_empty(nilist)) {
1461 ni = list_entry(nilist->next, lnet_ni_t, ni_list);
1462 lnd_type = LNET_NETTYP(LNET_NIDNET(ni->ni_nid));
1464 if (!libcfs_isknown_lnd(lnd_type))
1467 if (lnd_type == CIBLND ||
1468 lnd_type == OPENIBLND ||
1469 lnd_type == IIBLND ||
1470 lnd_type == VIBLND) {
1471 CERROR("LND %s obsoleted\n",
1472 libcfs_lnd2str(lnd_type));
1476 /* Make sure this new NI is unique. */
1477 lnet_net_lock(LNET_LOCK_EX);
1478 if (!lnet_net_unique(LNET_NIDNET(ni->ni_nid),
1479 &the_lnet.ln_nis)) {
1480 if (lnd_type == LOLND) {
1481 lnet_net_unlock(LNET_LOCK_EX);
1482 list_del(&ni->ni_list);
1487 CERROR("Net %s is not unique\n",
1488 libcfs_net2str(LNET_NIDNET(ni->ni_nid)));
1489 lnet_net_unlock(LNET_LOCK_EX);
1492 lnet_net_unlock(LNET_LOCK_EX);
1494 LNET_MUTEX_LOCK(&the_lnet.ln_lnd_mutex);
1495 lnd = lnet_find_lnd_by_type(lnd_type);
1499 LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
1500 rc = request_module("%s",
1501 libcfs_lnd2modname(lnd_type));
1502 LNET_MUTEX_LOCK(&the_lnet.ln_lnd_mutex);
1504 lnd = lnet_find_lnd_by_type(lnd_type);
1506 LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
1507 CERROR("Can't load LND %s, module %s, rc=%d\n",
1508 libcfs_lnd2str(lnd_type),
1509 libcfs_lnd2modname(lnd_type), rc);
1510 #ifndef HAVE_MODULE_LOADING_SUPPORT
1511 LCONSOLE_ERROR_MSG(0x104, "Your kernel must be "
1512 "compiled with kernel module "
1513 "loading support.");
1520 LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
1521 CERROR("LND %s not supported\n",
1522 libcfs_lnd2str(lnd_type));
1527 lnet_net_lock(LNET_LOCK_EX);
1528 lnd->lnd_refcount++;
1529 lnet_net_unlock(LNET_LOCK_EX);
1533 rc = (lnd->lnd_startup)(ni);
1535 LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
1538 LCONSOLE_ERROR_MSG(0x105, "Error %d starting up LNI %s"
1540 rc, libcfs_lnd2str(lnd->lnd_type));
1541 lnet_net_lock(LNET_LOCK_EX);
1542 lnd->lnd_refcount--;
1543 lnet_net_unlock(LNET_LOCK_EX);
1547 /* If given some LND tunable parameters, parse those now to
1548 * override the values in the NI structure. */
1549 if (peer_buf_cr >= 0)
1550 ni->ni_peerrtrcredits = peer_buf_cr;
1551 if (peer_timeout >= 0)
1552 ni->ni_peertimeout = peer_timeout;
1555 * Note: For now, don't allow the user to change
1556 * peertxcredits as this number is used in the
1557 * IB LND to control queue depth.
1558 * if (peer_cr != -1)
1559 * ni->ni_peertxcredits = peer_cr;
1562 ni->ni_maxtxcredits = credits;
1564 LASSERT(ni->ni_peertimeout <= 0 || lnd->lnd_query != NULL);
1566 list_del(&ni->ni_list);
1568 lnet_net_lock(LNET_LOCK_EX);
1569 /* refcount for ln_nis */
1570 lnet_ni_addref_locked(ni, 0);
1571 list_add_tail(&ni->ni_list, &the_lnet.ln_nis);
1572 if (ni->ni_cpts != NULL) {
1573 list_add_tail(&ni->ni_cptlist,
1574 &the_lnet.ln_nis_cpt);
1575 lnet_ni_addref_locked(ni, 0);
1578 lnet_net_unlock(LNET_LOCK_EX);
1580 /* increment the ni_count here to account for the LOLND as
1581 * well. If we increment past this point then the number
1582 * of count will be missing the LOLND, and then ping and
1583 * will not report the LOLND
1585 if (ni_count != NULL)
1588 if (lnd->lnd_type == LOLND) {
1590 LASSERT(the_lnet.ln_loni == NULL);
1591 the_lnet.ln_loni = ni;
1596 if (lnd->lnd_wait != NULL) {
1597 if (the_lnet.ln_eq_waitni == NULL) {
1599 the_lnet.ln_eq_waitni = ni;
1602 # ifndef HAVE_LIBPTHREAD
1603 LCONSOLE_ERROR_MSG(0x106, "LND %s not supported in a "
1604 "single-threaded runtime\n",
1605 libcfs_lnd2str(lnd_type));
1610 if (ni->ni_peertxcredits == 0 ||
1611 ni->ni_maxtxcredits == 0) {
1612 LCONSOLE_ERROR_MSG(0x107, "LNI %s has no %scredits\n",
1613 libcfs_lnd2str(lnd->lnd_type),
1614 ni->ni_peertxcredits == 0 ?
1619 cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
1620 tq->tq_credits_min =
1621 tq->tq_credits_max =
1622 tq->tq_credits = lnet_ni_tq_credits(ni);
1625 CDEBUG(D_LNI, "Added LNI %s [%d/%d/%d/%d]\n",
1626 libcfs_nid2str(ni->ni_nid), ni->ni_peertxcredits,
1627 lnet_ni_tq_credits(ni) * LNET_CPT_NUMBER,
1628 ni->ni_peerrtrcredits, ni->ni_peertimeout);
1633 while (!list_empty(nilist)) {
1634 ni = list_entry(nilist->next, lnet_ni_t, ni_list);
1635 list_del(&ni->ni_list);
1642 * Initialize LNet library.
1644 * Only userspace program needs to call this function - it's automatically
1645 * called in the kernel at module loading time. Caller has to call LNetFini()
1646 * after a call to LNetInit(), if and only if the latter returned 0. It must
1647 * be called exactly once.
1649 * \return 0 on success, and -ve on failures.
1656 lnet_assert_wire_constants();
1657 LASSERT(!the_lnet.ln_init);
1659 memset(&the_lnet, 0, sizeof(the_lnet));
1661 /* refer to global cfs_cpt_table for now */
1662 the_lnet.ln_cpt_table = cfs_cpt_table;
1663 the_lnet.ln_cpt_number = cfs_cpt_number(cfs_cpt_table);
1665 LASSERT(the_lnet.ln_cpt_number > 0);
1666 if (the_lnet.ln_cpt_number > LNET_CPT_MAX) {
1667 /* we are under risk of consuming all lh_cookie */
1668 CERROR("Can't have %d CPTs for LNet (max allowed is %d), "
1669 "please change setting of CPT-table and retry\n",
1670 the_lnet.ln_cpt_number, LNET_CPT_MAX);
1674 while ((1 << the_lnet.ln_cpt_bits) < the_lnet.ln_cpt_number)
1675 the_lnet.ln_cpt_bits++;
1677 rc = lnet_create_locks();
1679 CERROR("Can't create LNet global locks: %d\n", rc);
1683 the_lnet.ln_refcount = 0;
1684 the_lnet.ln_init = 1;
1685 LNetInvalidateHandle(&the_lnet.ln_rc_eqh);
1686 INIT_LIST_HEAD(&the_lnet.ln_lnds);
1687 INIT_LIST_HEAD(&the_lnet.ln_rcd_zombie);
1688 INIT_LIST_HEAD(&the_lnet.ln_rcd_deathrow);
1691 /* The hash table size is the number of bits it takes to express the set
1692 * ln_num_routes, minus 1 (better to under estimate than over so we
1693 * don't waste memory). */
1694 if (rnet_htable_size <= 0)
1695 rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT;
1696 else if (rnet_htable_size > LNET_REMOTE_NETS_HASH_MAX)
1697 rnet_htable_size = LNET_REMOTE_NETS_HASH_MAX;
1698 the_lnet.ln_remote_nets_hbits = max_t(int, 1,
1699 order_base_2(rnet_htable_size) - 1);
1701 /* All LNDs apart from the LOLND are in separate modules. They
1702 * register themselves when their module loads, and unregister
1703 * themselves when their module is unloaded. */
1705 the_lnet.ln_remote_nets_hbits = 8;
1708 * NB the order here determines default 'networks=' order */
1709 # ifdef HAVE_LIBPTHREAD
1710 LNET_REGISTER_ULND(the_tcplnd);
1713 lnet_register_lnd(&the_lolnd);
1716 EXPORT_SYMBOL(LNetInit);
1719 * Finalize LNet library.
1721 * Only userspace program needs to call this function. It can be called
1724 * \pre LNetInit() called with success.
1725 * \pre All LNet users called LNetNIFini() for matching LNetNIInit() calls.
1730 LASSERT(the_lnet.ln_init);
1731 LASSERT(the_lnet.ln_refcount == 0);
1733 while (!list_empty(&the_lnet.ln_lnds))
1734 lnet_unregister_lnd(list_entry(the_lnet.ln_lnds.next,
1736 lnet_destroy_locks();
1738 the_lnet.ln_init = 0;
1740 EXPORT_SYMBOL(LNetFini);
1743 * Set LNet PID and start LNet interfaces, routing, and forwarding.
1745 * Userspace program should call this after a successful call to LNetInit().
1746 * Users must call this function at least once before any other functions.
1747 * For each successful call there must be a corresponding call to
1748 * LNetNIFini(). For subsequent calls to LNetNIInit(), \a requested_pid is
1751 * The PID used by LNet may be different from the one requested.
1754 * \param requested_pid PID requested by the caller.
1756 * \return >= 0 on success, and < 0 error code on failures.
1759 LNetNIInit(lnet_pid_t requested_pid)
1761 int im_a_router = 0;
1766 lnet_ping_info_t *pinfo;
1767 lnet_handle_md_t md_handle;
1768 struct list_head net_head;
1770 INIT_LIST_HEAD(&net_head);
1772 LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
1774 LASSERT(the_lnet.ln_init);
1775 CDEBUG(D_OTHER, "refs %d\n", the_lnet.ln_refcount);
1777 if (the_lnet.ln_refcount > 0) {
1778 rc = the_lnet.ln_refcount++;
1779 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
1783 rc = lnet_prepare(requested_pid);
1787 rc = lnet_parse_networks(&net_head,
1788 !the_lnet.ln_nis_from_mod_params ?
1789 lnet_get_networks() : "");
1793 rc = lnet_startup_lndnis(&net_head, -1, -1, -1, -1, &ni_count);
1797 if (the_lnet.ln_eq_waitni != NULL && ni_count > 1) {
1798 lnd_type = the_lnet.ln_eq_waitni->ni_lnd->lnd_type;
1799 LCONSOLE_ERROR_MSG(0x109, "LND %s can only run single-network"
1801 libcfs_lnd2str(lnd_type));
1805 rc = lnet_parse_routes(lnet_get_routes(), &im_a_router);
1809 rc = lnet_check_routes();
1813 rc = lnet_rtrpools_alloc(im_a_router);
1817 rc = lnet_acceptor_start();
1820 the_lnet.ln_refcount = 1;
1821 /* Now I may use my own API functions... */
1823 rc = lnet_ping_info_setup(&pinfo, &md_handle, ni_count, true);
1827 lnet_ping_target_update(pinfo, md_handle);
1829 rc = lnet_router_checker_start();
1835 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
1840 the_lnet.ln_refcount = 0;
1841 lnet_ping_md_unlink(pinfo, &md_handle);
1842 lnet_ping_info_free(pinfo);
1844 lnet_acceptor_stop();
1845 rc = LNetEQFree(the_lnet.ln_ping_target_eq);
1848 lnet_destroy_routes();
1849 lnet_shutdown_lndnis();
1854 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
1855 while (!list_empty(&net_head)) {
1856 ni = list_entry(net_head.next, struct lnet_ni, ni_list);
1857 list_del_init(&ni->ni_list);
1862 EXPORT_SYMBOL(LNetNIInit);
1865 * Stop LNet interfaces, routing, and forwarding.
1867 * Users must call this function once for each successful call to LNetNIInit().
1868 * Once the LNetNIFini() operation has been started, the results of pending
1869 * API operations are undefined.
1871 * \return always 0 for current implementation.
1876 LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
1878 LASSERT (the_lnet.ln_init);
1879 LASSERT (the_lnet.ln_refcount > 0);
1881 if (the_lnet.ln_refcount != 1) {
1882 the_lnet.ln_refcount--;
1884 LASSERT (!the_lnet.ln_niinit_self);
1887 lnet_router_checker_stop();
1888 lnet_ping_target_fini();
1890 /* Teardown fns that use my own API functions BEFORE here */
1891 the_lnet.ln_refcount = 0;
1893 lnet_acceptor_stop();
1894 lnet_destroy_routes();
1895 lnet_shutdown_lndnis();
1899 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
1902 EXPORT_SYMBOL(LNetNIFini);
1905 * Grabs the ni data from the ni structure and fills the out
1908 * \param[in] ni network interface structure
1909 * \param[out] cpt_count the number of cpts the ni is on
1910 * \param[out] nid Network Interface ID
1911 * \param[out] peer_timeout NI peer timeout
1912 * \param[out] peer_tx_crdits NI peer transmit credits
1913 * \param[out] peer_rtr_credits NI peer router credits
1914 * \param[out] max_tx_credits NI max transmit credit
1915 * \param[out] net_config Network configuration
1918 lnet_fill_ni_info(struct lnet_ni *ni, __u32 *cpt_count, __u64 *nid,
1919 int *peer_timeout, int *peer_tx_credits,
1920 int *peer_rtr_credits, int *max_tx_credits,
1921 struct lnet_ioctl_net_config *net_config)
1928 if (net_config == NULL)
1931 CLASSERT(ARRAY_SIZE(ni->ni_interfaces) ==
1932 ARRAY_SIZE(net_config->ni_interfaces));
1934 if (ni->ni_interfaces[0] != NULL) {
1935 for (i = 0; i < ARRAY_SIZE(ni->ni_interfaces); i++) {
1936 if (ni->ni_interfaces[i] != NULL) {
1937 strncpy(net_config->ni_interfaces[i],
1938 ni->ni_interfaces[i],
1939 sizeof(net_config->ni_interfaces[i]));
1945 *peer_timeout = ni->ni_peertimeout;
1946 *peer_tx_credits = ni->ni_peertxcredits;
1947 *peer_rtr_credits = ni->ni_peerrtrcredits;
1948 *max_tx_credits = ni->ni_maxtxcredits;
1950 net_config->ni_status = ni->ni_status->ns_status;
1953 ni->ni_cpts != NULL && i < ni->ni_ncpts &&
1954 i < LNET_MAX_SHOW_NUM_CPT;
1956 net_config->ni_cpts[i] = ni->ni_cpts[i];
1958 *cpt_count = ni->ni_ncpts;
1962 lnet_get_net_config(int idx, __u32 *cpt_count, __u64 *nid, int *peer_timeout,
1963 int *peer_tx_credits, int *peer_rtr_credits,
1964 int *max_tx_credits,
1965 struct lnet_ioctl_net_config *net_config)
1968 struct list_head *tmp;
1972 cpt = lnet_net_lock_current();
1974 list_for_each(tmp, &the_lnet.ln_nis) {
1975 ni = list_entry(tmp, lnet_ni_t, ni_list);
1979 lnet_fill_ni_info(ni, cpt_count, nid, peer_timeout,
1980 peer_tx_credits, peer_rtr_credits,
1981 max_tx_credits, net_config);
1987 lnet_net_unlock(cpt);
1992 lnet_dyn_add_ni(lnet_pid_t requested_pid, char *nets,
1993 __s32 peer_timeout, __s32 peer_cr, __s32 peer_buf_cr,
1996 lnet_ping_info_t *pinfo;
1997 lnet_handle_md_t md_handle;
1999 struct list_head net_head;
2002 INIT_LIST_HEAD(&net_head);
2004 /* Create a ni structure for the network string */
2005 rc = lnet_parse_networks(&net_head, nets);
2009 LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
2012 rc = -EINVAL; /* only add one interface per call */
2016 rc = lnet_ping_info_setup(&pinfo, &md_handle, 1 + lnet_get_ni_count(),
2021 rc = lnet_startup_lndnis(&net_head, peer_timeout, peer_cr,
2022 peer_buf_cr, credits, NULL);
2026 lnet_ping_target_update(pinfo, md_handle);
2027 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
2032 lnet_ping_md_unlink(pinfo, &md_handle);
2033 lnet_ping_info_free(pinfo);
2035 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
2036 while (!list_empty(&net_head)) {
2037 ni = list_entry(net_head.next, struct lnet_ni, ni_list);
2038 list_del_init(&ni->ni_list);
2045 lnet_dyn_del_ni(__u32 net)
2049 LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
2050 rc = lnet_shutdown_lndni(net);
2051 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
2057 * This is an ugly hack to export IOC_LIBCFS_DEBUG_PEER and
2058 * IOC_LIBCFS_PORTALS_COMPATIBILITY commands to users, by tweaking the LNet
2059 * internal ioctl handler.
2061 * IOC_LIBCFS_PORTALS_COMPATIBILITY is now deprecated, don't use it.
2063 * \param cmd IOC_LIBCFS_DEBUG_PEER to print debugging data about a peer.
2064 * The data will be printed to system console. Don't use it excessively.
2065 * \param arg A pointer to lnet_process_id_t, process ID of the peer.
2067 * \return Always return 0 when called by users directly (i.e., not via ioctl).
2070 LNetCtl(unsigned int cmd, void *arg)
2072 struct libcfs_ioctl_data *data = arg;
2073 struct lnet_ioctl_config_data *config;
2074 lnet_process_id_t id = {0};
2078 CLASSERT(LIBCFS_IOC_DATA_MAX >= sizeof(struct lnet_ioctl_net_config) +
2079 sizeof(struct lnet_ioctl_config_data));
2080 LASSERT(the_lnet.ln_init);
2083 case IOC_LIBCFS_GET_NI:
2084 rc = LNetGetId(data->ioc_count, &id);
2085 data->ioc_nid = id.nid;
2088 case IOC_LIBCFS_FAIL_NID:
2089 return lnet_fail_nid(data->ioc_nid, data->ioc_count);
2091 case IOC_LIBCFS_ADD_ROUTE:
2093 LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
2094 rc = lnet_add_route(config->cfg_net,
2095 config->cfg_config_u.cfg_route.rtr_hop,
2097 config->cfg_config_u.cfg_route.
2099 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
2100 return (rc != 0) ? rc : lnet_check_routes();
2102 case IOC_LIBCFS_DEL_ROUTE:
2104 LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
2105 rc = lnet_del_route(config->cfg_net, config->cfg_nid);
2106 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
2109 case IOC_LIBCFS_GET_ROUTE:
2111 return lnet_get_route(config->cfg_count,
2113 &config->cfg_config_u.cfg_route.rtr_hop,
2115 &config->cfg_config_u.cfg_route.rtr_flags,
2116 &config->cfg_config_u.cfg_route.
2119 case IOC_LIBCFS_GET_NET: {
2120 struct lnet_ioctl_net_config *net_config;
2122 net_config = (struct lnet_ioctl_net_config *)
2124 if (config == NULL || net_config == NULL)
2127 return lnet_get_net_config(config->cfg_count,
2130 &config->cfg_config_u.
2131 cfg_net.net_peer_timeout,
2132 &config->cfg_config_u.cfg_net.
2133 net_peer_tx_credits,
2134 &config->cfg_config_u.cfg_net.
2135 net_peer_rtr_credits,
2136 &config->cfg_config_u.cfg_net.
2141 case IOC_LIBCFS_GET_LNET_STATS:
2143 struct lnet_ioctl_lnet_stats *lnet_stats = arg;
2145 lnet_counters_get(&lnet_stats->st_cntrs);
2149 #if defined(__KERNEL__) && defined(LNET_ROUTER)
2150 case IOC_LIBCFS_CONFIG_RTR:
2152 LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
2153 if (config->cfg_config_u.cfg_buffers.buf_enable) {
2154 rc = lnet_rtrpools_enable();
2155 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
2158 lnet_rtrpools_disable();
2159 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
2162 case IOC_LIBCFS_ADD_BUF:
2164 LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
2165 rc = lnet_rtrpools_adjust(config->cfg_config_u.cfg_buffers.
2167 config->cfg_config_u.cfg_buffers.
2169 config->cfg_config_u.cfg_buffers.
2171 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
2175 case IOC_LIBCFS_GET_BUF: {
2176 struct lnet_ioctl_pool_cfg *pool_cfg;
2178 pool_cfg = (struct lnet_ioctl_pool_cfg *)config->cfg_bulk;
2179 return lnet_get_rtr_pool_cfg(config->cfg_count, pool_cfg);
2182 case IOC_LIBCFS_GET_PEER_INFO: {
2183 struct lnet_ioctl_peer *peer_info = arg;
2184 return lnet_get_peer_info(
2185 peer_info->pr_count,
2187 peer_info->pr_lnd_u.pr_peer_credits.cr_aliveness,
2188 &peer_info->pr_lnd_u.pr_peer_credits.cr_ncpt,
2189 &peer_info->pr_lnd_u.pr_peer_credits.cr_refcount,
2190 &peer_info->pr_lnd_u.pr_peer_credits.cr_ni_peer_tx_credits,
2191 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_credits,
2192 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_rtr_credits,
2193 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_min_rtr_credits,
2194 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_qnob);
2197 case IOC_LIBCFS_NOTIFY_ROUTER:
2198 return lnet_notify(NULL, data->ioc_nid, data->ioc_flags,
2199 cfs_time_current() -
2200 cfs_time_seconds(cfs_time_current_sec() -
2201 (time_t)data->ioc_u64[0]));
2203 case IOC_LIBCFS_PORTALS_COMPATIBILITY:
2204 /* This can be removed once lustre stops calling it */
2207 case IOC_LIBCFS_LNET_DIST:
2208 rc = LNetDist(data->ioc_nid, &data->ioc_nid, &data->ioc_u32[1]);
2209 if (rc < 0 && rc != -EHOSTUNREACH)
2212 data->ioc_u32[0] = rc;
2215 case IOC_LIBCFS_TESTPROTOCOMPAT:
2216 lnet_net_lock(LNET_LOCK_EX);
2217 the_lnet.ln_testprotocompat = data->ioc_flags;
2218 lnet_net_unlock(LNET_LOCK_EX);
2221 case IOC_LIBCFS_PING:
2222 id.nid = data->ioc_nid;
2223 id.pid = data->ioc_u32[0];
2224 rc = lnet_ping(id, data->ioc_u32[1], /* timeout */
2225 (lnet_process_id_t __user *)data->ioc_pbuf1,
2226 data->ioc_plen1/sizeof(lnet_process_id_t));
2229 data->ioc_count = rc;
2232 case IOC_LIBCFS_DEBUG_PEER: {
2233 /* CAVEAT EMPTOR: this one designed for calling directly; not
2235 id = *((lnet_process_id_t *) arg);
2237 lnet_debug_peer(id.nid);
2239 ni = lnet_net2ni(LNET_NIDNET(id.nid));
2241 CDEBUG(D_WARNING, "No NI for %s\n", libcfs_id2str(id));
2243 if (ni->ni_lnd->lnd_ctl == NULL) {
2244 CDEBUG(D_WARNING, "No ctl for %s\n",
2247 (void)ni->ni_lnd->lnd_ctl(ni, cmd, arg);
2256 ni = lnet_net2ni(data->ioc_net);
2260 if (ni->ni_lnd->lnd_ctl == NULL)
2263 rc = ni->ni_lnd->lnd_ctl(ni, cmd, arg);
2270 EXPORT_SYMBOL(LNetCtl);
2273 * Retrieve the lnet_process_id_t ID of LNet interface at \a index. Note that
2274 * all interfaces share a same PID, as requested by LNetNIInit().
2276 * \param index Index of the interface to look up.
2277 * \param id On successful return, this location will hold the
2278 * lnet_process_id_t ID of the interface.
2280 * \retval 0 If an interface exists at \a index.
2281 * \retval -ENOENT If no interface has been found.
2284 LNetGetId(unsigned int index, lnet_process_id_t *id)
2287 struct list_head *tmp;
2291 LASSERT(the_lnet.ln_init);
2292 LASSERT(the_lnet.ln_refcount > 0);
2294 cpt = lnet_net_lock_current();
2296 list_for_each(tmp, &the_lnet.ln_nis) {
2300 ni = list_entry(tmp, lnet_ni_t, ni_list);
2302 id->nid = ni->ni_nid;
2303 id->pid = the_lnet.ln_pid;
2308 lnet_net_unlock(cpt);
2311 EXPORT_SYMBOL(LNetGetId);
2314 * Print a string representation of handle \a h into buffer \a str of
2318 LNetSnprintHandle(char *str, int len, lnet_handle_any_t h)
2320 snprintf(str, len, LPX64, h.cookie);
2322 EXPORT_SYMBOL(LNetSnprintHandle);
2325 lnet_ping(lnet_process_id_t id, int timeout_ms, lnet_process_id_t __user *ids,
2328 lnet_handle_eq_t eqh;
2329 lnet_handle_md_t mdh;
2335 const int a_long_time = 60000; /* mS */
2337 lnet_ping_info_t *info;
2338 lnet_process_id_t tmpid;
2345 infosz = offsetof(lnet_ping_info_t, pi_ni[n_ids]);
2348 id.nid == LNET_NID_ANY ||
2349 timeout_ms > 500000 || /* arbitrary limit! */
2350 n_ids > 20) /* arbitrary limit! */
2353 if (id.pid == LNET_PID_ANY)
2354 id.pid = LNET_PID_LUSTRE;
2356 LIBCFS_ALLOC(info, infosz);
2360 /* NB 2 events max (including any unlink event) */
2361 rc = LNetEQAlloc(2, LNET_EQ_HANDLER_NONE, &eqh);
2363 CERROR("Can't allocate EQ: %d\n", rc);
2367 /* initialize md content */
2370 md.threshold = 2; /*GET/REPLY*/
2372 md.options = LNET_MD_TRUNCATE;
2376 rc = LNetMDBind(md, LNET_UNLINK, &mdh);
2378 CERROR("Can't bind MD: %d\n", rc);
2382 rc = LNetGet(LNET_NID_ANY, mdh, id,
2383 LNET_RESERVED_PORTAL,
2384 LNET_PROTO_PING_MATCHBITS, 0);
2387 /* Don't CERROR; this could be deliberate! */
2389 rc2 = LNetMDUnlink(mdh);
2392 /* NB must wait for the UNLINK event below... */
2394 timeout_ms = a_long_time;
2398 /* MUST block for unlink to complete */
2400 blocked = cfs_block_allsigs();
2402 rc2 = LNetEQPoll(&eqh, 1, timeout_ms, &event, &which);
2405 cfs_restore_sigs(blocked);
2407 CDEBUG(D_NET, "poll %d(%d %d)%s\n", rc2,
2408 (rc2 <= 0) ? -1 : event.type,
2409 (rc2 <= 0) ? -1 : event.status,
2410 (rc2 > 0 && event.unlinked) ? " unlinked" : "");
2412 LASSERT(rc2 != -EOVERFLOW); /* can't miss anything */
2414 if (rc2 <= 0 || event.status != 0) {
2415 /* timeout or error */
2416 if (!replied && rc == 0)
2417 rc = (rc2 < 0) ? rc2 :
2418 (rc2 == 0) ? -ETIMEDOUT :
2422 /* Ensure completion in finite time... */
2424 /* No assertion (racing with network) */
2426 timeout_ms = a_long_time;
2427 } else if (rc2 == 0) {
2428 /* timed out waiting for unlink */
2429 CWARN("ping %s: late network completion\n",
2432 } else if (event.type == LNET_EVENT_REPLY) {
2437 } while (rc2 <= 0 || !event.unlinked);
2441 CWARN("%s: Unexpected rc >= 0 but no reply!\n",
2448 LASSERT(nob >= 0 && nob <= infosz);
2450 rc = -EPROTO; /* if I can't parse... */
2453 /* can't check magic/version */
2454 CERROR("%s: ping info too short %d\n",
2455 libcfs_id2str(id), nob);
2459 if (info->pi_magic == __swab32(LNET_PROTO_PING_MAGIC)) {
2460 lnet_swap_pinginfo(info);
2461 } else if (info->pi_magic != LNET_PROTO_PING_MAGIC) {
2462 CERROR("%s: Unexpected magic %08x\n",
2463 libcfs_id2str(id), info->pi_magic);
2467 if ((info->pi_features & LNET_PING_FEAT_NI_STATUS) == 0) {
2468 CERROR("%s: ping w/o NI status: 0x%x\n",
2469 libcfs_id2str(id), info->pi_features);
2473 if (nob < offsetof(lnet_ping_info_t, pi_ni[0])) {
2474 CERROR("%s: Short reply %d(%d min)\n", libcfs_id2str(id),
2475 nob, (int)offsetof(lnet_ping_info_t, pi_ni[0]));
2479 if (info->pi_nnis < n_ids)
2480 n_ids = info->pi_nnis;
2482 if (nob < offsetof(lnet_ping_info_t, pi_ni[n_ids])) {
2483 CERROR("%s: Short reply %d(%d expected)\n", libcfs_id2str(id),
2484 nob, (int)offsetof(lnet_ping_info_t, pi_ni[n_ids]));
2488 rc = -EFAULT; /* If I SEGV... */
2490 for (i = 0; i < n_ids; i++) {
2491 tmpid.pid = info->pi_pid;
2492 tmpid.nid = info->pi_ni[i].ns_nid;
2493 if (copy_to_user(&ids[i], &tmpid, sizeof(tmpid)))
2499 rc2 = LNetEQFree(eqh);
2501 CERROR("rc2 %d\n", rc2);
2505 LIBCFS_FREE(info, infosz);