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);
759 INIT_LIST_HEAD(&the_lnet.ln_drop_rules);
760 INIT_LIST_HEAD(&the_lnet.ln_delay_rules);
762 rc = lnet_create_remote_nets_table();
766 the_lnet.ln_interface_cookie = lnet_create_interface_cookie();
768 the_lnet.ln_counters = cfs_percpt_alloc(lnet_cpt_table(),
769 sizeof(lnet_counters_t));
770 if (the_lnet.ln_counters == NULL) {
771 CERROR("Failed to allocate counters for LNet\n");
776 rc = lnet_peer_tables_create();
780 rc = lnet_msg_containers_create();
784 rc = lnet_res_container_setup(&the_lnet.ln_eq_container, 0,
785 LNET_COOKIE_TYPE_EQ, LNET_FL_MAX_EQS,
790 recs = lnet_res_containers_create(LNET_COOKIE_TYPE_ME, LNET_FL_MAX_MES,
795 the_lnet.ln_me_containers = recs;
797 recs = lnet_res_containers_create(LNET_COOKIE_TYPE_MD, LNET_FL_MAX_MDS,
798 sizeof(lnet_libmd_t));
802 the_lnet.ln_md_containers = recs;
804 rc = lnet_portals_create();
806 CERROR("Failed to create portals for LNet: %d\n", rc);
818 lnet_unprepare (void)
820 /* NB no LNET_LOCK since this is the last reference. All LND instances
821 * have shut down already, so it is safe to unlink and free all
822 * descriptors, even those that appear committed to a network op (eg MD
823 * with non-zero pending count) */
825 lnet_fail_nid(LNET_NID_ANY, 0);
827 LASSERT(the_lnet.ln_refcount == 0);
828 LASSERT(list_empty(&the_lnet.ln_test_peers));
829 LASSERT(list_empty(&the_lnet.ln_nis));
830 LASSERT(list_empty(&the_lnet.ln_nis_cpt));
831 LASSERT(list_empty(&the_lnet.ln_nis_zombie));
833 lnet_portals_destroy();
835 if (the_lnet.ln_md_containers != NULL) {
836 lnet_res_containers_destroy(the_lnet.ln_md_containers);
837 the_lnet.ln_md_containers = NULL;
840 if (the_lnet.ln_me_containers != NULL) {
841 lnet_res_containers_destroy(the_lnet.ln_me_containers);
842 the_lnet.ln_me_containers = NULL;
845 lnet_res_container_cleanup(&the_lnet.ln_eq_container);
847 lnet_msg_containers_destroy();
848 lnet_peer_tables_destroy();
849 lnet_rtrpools_free(0);
851 if (the_lnet.ln_counters != NULL) {
852 cfs_percpt_free(the_lnet.ln_counters);
853 the_lnet.ln_counters = NULL;
855 lnet_destroy_remote_nets_table();
861 lnet_net2ni_locked(__u32 net, int cpt)
863 struct list_head *tmp;
866 LASSERT(cpt != LNET_LOCK_EX);
868 list_for_each(tmp, &the_lnet.ln_nis) {
869 ni = list_entry(tmp, lnet_ni_t, ni_list);
871 if (LNET_NIDNET(ni->ni_nid) == net) {
872 lnet_ni_addref_locked(ni, cpt);
881 lnet_net2ni(__u32 net)
886 ni = lnet_net2ni_locked(net, 0);
891 EXPORT_SYMBOL(lnet_net2ni);
894 lnet_nid_cpt_hash(lnet_nid_t nid, unsigned int number)
899 LASSERT(number >= 1 && number <= LNET_CPT_NUMBER);
904 val = hash_long(key, LNET_CPT_BITS);
905 /* NB: LNET_CP_NUMBER doesn't have to be PO2 */
909 return (unsigned int)(key + val + (val >> 1)) % number;
913 lnet_cpt_of_nid_locked(lnet_nid_t nid)
917 /* must called with hold of lnet_net_lock */
918 if (LNET_CPT_NUMBER == 1)
919 return 0; /* the only one */
921 /* take lnet_net_lock(any) would be OK */
922 if (!list_empty(&the_lnet.ln_nis_cpt)) {
923 list_for_each_entry(ni, &the_lnet.ln_nis_cpt, ni_cptlist) {
924 if (LNET_NIDNET(ni->ni_nid) != LNET_NIDNET(nid))
927 LASSERT(ni->ni_cpts != NULL);
928 return ni->ni_cpts[lnet_nid_cpt_hash
929 (nid, ni->ni_ncpts)];
933 return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
937 lnet_cpt_of_nid(lnet_nid_t nid)
942 if (LNET_CPT_NUMBER == 1)
943 return 0; /* the only one */
945 if (list_empty(&the_lnet.ln_nis_cpt))
946 return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
948 cpt = lnet_net_lock_current();
949 cpt2 = lnet_cpt_of_nid_locked(nid);
950 lnet_net_unlock(cpt);
954 EXPORT_SYMBOL(lnet_cpt_of_nid);
957 lnet_islocalnet(__u32 net)
962 cpt = lnet_net_lock_current();
964 ni = lnet_net2ni_locked(net, cpt);
966 lnet_ni_decref_locked(ni, cpt);
968 lnet_net_unlock(cpt);
974 lnet_nid2ni_locked(lnet_nid_t nid, int cpt)
977 struct list_head *tmp;
979 LASSERT(cpt != LNET_LOCK_EX);
981 list_for_each(tmp, &the_lnet.ln_nis) {
982 ni = list_entry(tmp, lnet_ni_t, ni_list);
984 if (ni->ni_nid == nid) {
985 lnet_ni_addref_locked(ni, cpt);
994 lnet_islocalnid(lnet_nid_t nid)
999 cpt = lnet_net_lock_current();
1000 ni = lnet_nid2ni_locked(nid, cpt);
1002 lnet_ni_decref_locked(ni, cpt);
1003 lnet_net_unlock(cpt);
1009 lnet_count_acceptor_nis (void)
1011 /* Return the # of NIs that need the acceptor. */
1013 #if defined(__KERNEL__) || defined(HAVE_LIBPTHREAD)
1014 struct list_head *tmp;
1018 cpt = lnet_net_lock_current();
1019 list_for_each(tmp, &the_lnet.ln_nis) {
1020 ni = list_entry(tmp, lnet_ni_t, ni_list);
1022 if (ni->ni_lnd->lnd_accept != NULL)
1026 lnet_net_unlock(cpt);
1028 #endif /* defined(__KERNEL__) || defined(HAVE_LIBPTHREAD) */
1032 static lnet_ping_info_t *
1033 lnet_ping_info_create(int num_ni)
1035 lnet_ping_info_t *ping_info;
1036 unsigned int infosz;
1038 infosz = offsetof(lnet_ping_info_t, pi_ni[num_ni]);
1039 LIBCFS_ALLOC(ping_info, infosz);
1040 if (ping_info == NULL) {
1041 CERROR("Can't allocate ping info[%d]\n", num_ni);
1045 ping_info->pi_nnis = num_ni;
1046 ping_info->pi_pid = the_lnet.ln_pid;
1047 ping_info->pi_magic = LNET_PROTO_PING_MAGIC;
1048 ping_info->pi_features = LNET_PING_FEAT_NI_STATUS;
1054 lnet_get_ni_count(void)
1061 list_for_each_entry(ni, &the_lnet.ln_nis, ni_list)
1070 lnet_ping_info_free(lnet_ping_info_t *pinfo)
1073 offsetof(lnet_ping_info_t,
1074 pi_ni[pinfo->pi_nnis]));
1078 lnet_ping_info_destroy(void)
1082 lnet_net_lock(LNET_LOCK_EX);
1084 list_for_each_entry(ni, &the_lnet.ln_nis, ni_list) {
1086 ni->ni_status = NULL;
1090 lnet_ping_info_free(the_lnet.ln_ping_info);
1091 the_lnet.ln_ping_info = NULL;
1093 lnet_net_unlock(LNET_LOCK_EX);
1097 lnet_ping_event_handler(lnet_event_t *event)
1099 lnet_ping_info_t *pinfo = event->md.user_ptr;
1101 if (event->unlinked)
1102 pinfo->pi_features = LNET_PING_FEAT_INVAL;
1106 lnet_ping_info_setup(lnet_ping_info_t **ppinfo, lnet_handle_md_t *md_handle,
1107 int ni_count, bool set_eq)
1109 lnet_handle_me_t me_handle;
1110 lnet_process_id_t id = {LNET_NID_ANY, LNET_PID_ANY};
1115 rc = LNetEQAlloc(0, lnet_ping_event_handler,
1116 &the_lnet.ln_ping_target_eq);
1118 CERROR("Can't allocate ping EQ: %d\n", rc);
1123 *ppinfo = lnet_ping_info_create(ni_count);
1124 if (*ppinfo == NULL) {
1129 rc = LNetMEAttach(LNET_RESERVED_PORTAL, id,
1130 LNET_PROTO_PING_MATCHBITS, 0,
1131 LNET_UNLINK, LNET_INS_AFTER,
1134 CERROR("Can't create ping ME: %d\n", rc);
1138 /* initialize md content */
1140 md.length = offsetof(lnet_ping_info_t,
1141 pi_ni[(*ppinfo)->pi_nnis]);
1142 md.threshold = LNET_MD_THRESH_INF;
1144 md.options = LNET_MD_OP_GET | LNET_MD_TRUNCATE |
1145 LNET_MD_MANAGE_REMOTE;
1147 md.eq_handle = the_lnet.ln_ping_target_eq;
1148 md.user_ptr = *ppinfo;
1150 rc = LNetMDAttach(me_handle, md, LNET_RETAIN, md_handle);
1152 CERROR("Can't attach ping MD: %d\n", rc);
1159 rc2 = LNetMEUnlink(me_handle);
1162 lnet_ping_info_free(*ppinfo);
1166 LNetEQFree(the_lnet.ln_ping_target_eq);
1171 lnet_ping_md_unlink(lnet_ping_info_t *pinfo, lnet_handle_md_t *md_handle)
1173 sigset_t blocked = cfs_block_allsigs();
1175 LNetMDUnlink(*md_handle);
1176 LNetInvalidateHandle(md_handle);
1178 /* NB md could be busy; this just starts the unlink */
1179 while (pinfo->pi_features != LNET_PING_FEAT_INVAL) {
1180 CDEBUG(D_NET, "Still waiting for ping MD to unlink\n");
1181 cfs_pause(cfs_time_seconds(1));
1184 cfs_restore_sigs(blocked);
1188 lnet_ping_info_install_locked(lnet_ping_info_t *ping_info)
1192 lnet_ni_status_t *ns;
1195 list_for_each_entry(ni, &the_lnet.ln_nis, ni_list) {
1196 LASSERT(i < ping_info->pi_nnis);
1198 ns = &ping_info->pi_ni[i];
1200 ns->ns_nid = ni->ni_nid;
1203 ns->ns_status = (ni->ni_status != NULL) ?
1204 ni->ni_status->ns_status : LNET_NI_STATUS_UP;
1213 lnet_ping_target_update(lnet_ping_info_t *pinfo, lnet_handle_md_t md_handle)
1215 lnet_ping_info_t *old_pinfo = NULL;
1216 lnet_handle_md_t old_md;
1218 /* switch the NIs to point to the new ping info created */
1219 lnet_net_lock(LNET_LOCK_EX);
1221 if (!the_lnet.ln_routing)
1222 pinfo->pi_features |= LNET_PING_FEAT_RTE_DISABLED;
1223 lnet_ping_info_install_locked(pinfo);
1225 if (the_lnet.ln_ping_info != NULL) {
1226 old_pinfo = the_lnet.ln_ping_info;
1227 old_md = the_lnet.ln_ping_target_md;
1229 the_lnet.ln_ping_target_md = md_handle;
1230 the_lnet.ln_ping_info = pinfo;
1232 lnet_net_unlock(LNET_LOCK_EX);
1234 if (old_pinfo != NULL) {
1235 /* unlink the old ping info */
1236 lnet_ping_md_unlink(old_pinfo, &old_md);
1237 lnet_ping_info_free(old_pinfo);
1242 lnet_ping_target_fini(void)
1246 lnet_ping_md_unlink(the_lnet.ln_ping_info,
1247 &the_lnet.ln_ping_target_md);
1249 rc = LNetEQFree(the_lnet.ln_ping_target_eq);
1252 lnet_ping_info_destroy();
1256 lnet_ni_tq_credits(lnet_ni_t *ni)
1260 LASSERT(ni->ni_ncpts >= 1);
1262 if (ni->ni_ncpts == 1)
1263 return ni->ni_maxtxcredits;
1265 credits = ni->ni_maxtxcredits / ni->ni_ncpts;
1266 credits = max(credits, 8 * ni->ni_peertxcredits);
1267 credits = min(credits, ni->ni_maxtxcredits);
1273 lnet_clear_zombies_nis_locked(void)
1279 /* Now wait for the NI's I just nuked to show up on ln_zombie_nis
1280 * and shut them down in guaranteed thread context */
1282 while (!list_empty(&the_lnet.ln_nis_zombie)) {
1286 ni = list_entry(the_lnet.ln_nis_zombie.next,
1287 lnet_ni_t, ni_list);
1288 list_del_init(&ni->ni_list);
1289 cfs_percpt_for_each(ref, j, ni->ni_refs) {
1292 /* still busy, add it back to zombie list */
1293 list_add(&ni->ni_list, &the_lnet.ln_nis_zombie);
1297 if (!list_empty(&ni->ni_list)) {
1298 lnet_net_unlock(LNET_LOCK_EX);
1300 if ((i & (-i)) == i) {
1302 "Waiting for zombie LNI %s\n",
1303 libcfs_nid2str(ni->ni_nid));
1305 cfs_pause(cfs_time_seconds(1));
1306 lnet_net_lock(LNET_LOCK_EX);
1310 ni->ni_lnd->lnd_refcount--;
1311 lnet_net_unlock(LNET_LOCK_EX);
1313 islo = ni->ni_lnd->lnd_type == LOLND;
1315 LASSERT(!in_interrupt());
1316 (ni->ni_lnd->lnd_shutdown)(ni);
1318 /* can't deref lnd anymore now; it might have unregistered
1322 CDEBUG(D_LNI, "Removed LNI %s\n",
1323 libcfs_nid2str(ni->ni_nid));
1327 lnet_net_lock(LNET_LOCK_EX);
1332 lnet_shutdown_lndnis(void)
1337 /* NB called holding the global mutex */
1339 /* All quiet on the API front */
1340 LASSERT(!the_lnet.ln_shutdown);
1341 LASSERT(the_lnet.ln_refcount == 0);
1342 LASSERT(list_empty(&the_lnet.ln_nis_zombie));
1344 lnet_net_lock(LNET_LOCK_EX);
1345 the_lnet.ln_shutdown = 1; /* flag shutdown */
1347 /* Unlink NIs from the global table */
1348 while (!list_empty(&the_lnet.ln_nis)) {
1349 ni = list_entry(the_lnet.ln_nis.next,
1350 lnet_ni_t, ni_list);
1351 /* move it to zombie list and nobody can find it anymore */
1352 list_move(&ni->ni_list, &the_lnet.ln_nis_zombie);
1353 lnet_ni_decref_locked(ni, 0); /* drop ln_nis' ref */
1355 if (!list_empty(&ni->ni_cptlist)) {
1356 list_del_init(&ni->ni_cptlist);
1357 lnet_ni_decref_locked(ni, 0);
1361 /* Drop the cached eqwait NI. */
1362 if (the_lnet.ln_eq_waitni != NULL) {
1363 lnet_ni_decref_locked(the_lnet.ln_eq_waitni, 0);
1364 the_lnet.ln_eq_waitni = NULL;
1367 /* Drop the cached loopback NI. */
1368 if (the_lnet.ln_loni != NULL) {
1369 lnet_ni_decref_locked(the_lnet.ln_loni, 0);
1370 the_lnet.ln_loni = NULL;
1373 lnet_net_unlock(LNET_LOCK_EX);
1375 /* Clear lazy portals and drop delayed messages which hold refs
1376 * on their lnet_msg_t::msg_rxpeer */
1377 for (i = 0; i < the_lnet.ln_nportals; i++)
1378 LNetClearLazyPortal(i);
1380 /* Clear the peer table and wait for all peers to go (they hold refs on
1382 lnet_peer_tables_cleanup(NULL);
1384 lnet_net_lock(LNET_LOCK_EX);
1386 lnet_clear_zombies_nis_locked();
1387 the_lnet.ln_shutdown = 0;
1388 lnet_net_unlock(LNET_LOCK_EX);
1392 lnet_shutdown_lndni(__u32 net)
1394 lnet_ping_info_t *pinfo;
1395 lnet_handle_md_t md_handle;
1396 lnet_ni_t *found_ni = NULL;
1400 if (LNET_NETTYP(net) == LOLND)
1403 ni_count = lnet_get_ni_count();
1405 /* create and link a new ping info, before removing the old one */
1406 rc = lnet_ping_info_setup(&pinfo, &md_handle, ni_count - 1, false);
1410 /* proceed with shutting down the NI */
1411 lnet_net_lock(LNET_LOCK_EX);
1413 found_ni = lnet_net2ni_locked(net, 0);
1414 if (found_ni == NULL) {
1415 lnet_net_unlock(LNET_LOCK_EX);
1416 lnet_ping_md_unlink(pinfo, &md_handle);
1417 lnet_ping_info_free(pinfo);
1421 /* decrement the reference counter on found_ni which was
1422 * incremented when we called lnet_net2ni_locked() */
1423 lnet_ni_decref_locked(found_ni, 0);
1425 /* Move ni to zombie list so nobody can find it anymore */
1426 list_move(&found_ni->ni_list, &the_lnet.ln_nis_zombie);
1428 /* Drop the lock reference for the ln_nis ref. */
1429 lnet_ni_decref_locked(found_ni, 0);
1431 if (!list_empty(&found_ni->ni_cptlist)) {
1432 list_del_init(&found_ni->ni_cptlist);
1433 lnet_ni_decref_locked(found_ni, 0);
1436 lnet_net_unlock(LNET_LOCK_EX);
1438 /* Do peer table cleanup for this ni */
1439 lnet_peer_tables_cleanup(found_ni);
1441 lnet_net_lock(LNET_LOCK_EX);
1442 lnet_clear_zombies_nis_locked();
1443 lnet_net_unlock(LNET_LOCK_EX);
1445 lnet_ping_target_update(pinfo, md_handle);
1451 lnet_startup_lndnis(struct list_head *nilist, __s32 peer_timeout,
1452 __s32 peer_cr, __s32 peer_buf_cr, __s32 credits,
1459 struct lnet_tx_queue *tq;
1462 while (!list_empty(nilist)) {
1463 ni = list_entry(nilist->next, lnet_ni_t, ni_list);
1464 lnd_type = LNET_NETTYP(LNET_NIDNET(ni->ni_nid));
1466 if (!libcfs_isknown_lnd(lnd_type))
1469 if (lnd_type == CIBLND ||
1470 lnd_type == OPENIBLND ||
1471 lnd_type == IIBLND ||
1472 lnd_type == VIBLND) {
1473 CERROR("LND %s obsoleted\n",
1474 libcfs_lnd2str(lnd_type));
1478 /* Make sure this new NI is unique. */
1479 lnet_net_lock(LNET_LOCK_EX);
1480 if (!lnet_net_unique(LNET_NIDNET(ni->ni_nid),
1481 &the_lnet.ln_nis)) {
1482 if (lnd_type == LOLND) {
1483 lnet_net_unlock(LNET_LOCK_EX);
1484 list_del(&ni->ni_list);
1489 CERROR("Net %s is not unique\n",
1490 libcfs_net2str(LNET_NIDNET(ni->ni_nid)));
1491 lnet_net_unlock(LNET_LOCK_EX);
1494 lnet_net_unlock(LNET_LOCK_EX);
1496 LNET_MUTEX_LOCK(&the_lnet.ln_lnd_mutex);
1497 lnd = lnet_find_lnd_by_type(lnd_type);
1501 LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
1502 rc = request_module("%s",
1503 libcfs_lnd2modname(lnd_type));
1504 LNET_MUTEX_LOCK(&the_lnet.ln_lnd_mutex);
1506 lnd = lnet_find_lnd_by_type(lnd_type);
1508 LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
1509 CERROR("Can't load LND %s, module %s, rc=%d\n",
1510 libcfs_lnd2str(lnd_type),
1511 libcfs_lnd2modname(lnd_type), rc);
1512 #ifndef HAVE_MODULE_LOADING_SUPPORT
1513 LCONSOLE_ERROR_MSG(0x104, "Your kernel must be "
1514 "compiled with kernel module "
1515 "loading support.");
1522 LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
1523 CERROR("LND %s not supported\n",
1524 libcfs_lnd2str(lnd_type));
1529 lnet_net_lock(LNET_LOCK_EX);
1530 lnd->lnd_refcount++;
1531 lnet_net_unlock(LNET_LOCK_EX);
1535 rc = (lnd->lnd_startup)(ni);
1537 LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
1540 LCONSOLE_ERROR_MSG(0x105, "Error %d starting up LNI %s"
1542 rc, libcfs_lnd2str(lnd->lnd_type));
1543 lnet_net_lock(LNET_LOCK_EX);
1544 lnd->lnd_refcount--;
1545 lnet_net_unlock(LNET_LOCK_EX);
1549 /* If given some LND tunable parameters, parse those now to
1550 * override the values in the NI structure. */
1551 if (peer_buf_cr >= 0)
1552 ni->ni_peerrtrcredits = peer_buf_cr;
1553 if (peer_timeout >= 0)
1554 ni->ni_peertimeout = peer_timeout;
1557 * Note: For now, don't allow the user to change
1558 * peertxcredits as this number is used in the
1559 * IB LND to control queue depth.
1560 * if (peer_cr != -1)
1561 * ni->ni_peertxcredits = peer_cr;
1564 ni->ni_maxtxcredits = credits;
1566 LASSERT(ni->ni_peertimeout <= 0 || lnd->lnd_query != NULL);
1568 list_del(&ni->ni_list);
1570 lnet_net_lock(LNET_LOCK_EX);
1571 /* refcount for ln_nis */
1572 lnet_ni_addref_locked(ni, 0);
1573 list_add_tail(&ni->ni_list, &the_lnet.ln_nis);
1574 if (ni->ni_cpts != NULL) {
1575 list_add_tail(&ni->ni_cptlist,
1576 &the_lnet.ln_nis_cpt);
1577 lnet_ni_addref_locked(ni, 0);
1580 lnet_net_unlock(LNET_LOCK_EX);
1582 /* increment the ni_count here to account for the LOLND as
1583 * well. If we increment past this point then the number
1584 * of count will be missing the LOLND, and then ping and
1585 * will not report the LOLND
1587 if (ni_count != NULL)
1590 if (lnd->lnd_type == LOLND) {
1592 LASSERT(the_lnet.ln_loni == NULL);
1593 the_lnet.ln_loni = ni;
1598 if (lnd->lnd_wait != NULL) {
1599 if (the_lnet.ln_eq_waitni == NULL) {
1601 the_lnet.ln_eq_waitni = ni;
1604 # ifndef HAVE_LIBPTHREAD
1605 LCONSOLE_ERROR_MSG(0x106, "LND %s not supported in a "
1606 "single-threaded runtime\n",
1607 libcfs_lnd2str(lnd_type));
1612 if (ni->ni_peertxcredits == 0 ||
1613 ni->ni_maxtxcredits == 0) {
1614 LCONSOLE_ERROR_MSG(0x107, "LNI %s has no %scredits\n",
1615 libcfs_lnd2str(lnd->lnd_type),
1616 ni->ni_peertxcredits == 0 ?
1621 cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
1622 tq->tq_credits_min =
1623 tq->tq_credits_max =
1624 tq->tq_credits = lnet_ni_tq_credits(ni);
1627 CDEBUG(D_LNI, "Added LNI %s [%d/%d/%d/%d]\n",
1628 libcfs_nid2str(ni->ni_nid), ni->ni_peertxcredits,
1629 lnet_ni_tq_credits(ni) * LNET_CPT_NUMBER,
1630 ni->ni_peerrtrcredits, ni->ni_peertimeout);
1635 while (!list_empty(nilist)) {
1636 ni = list_entry(nilist->next, lnet_ni_t, ni_list);
1637 list_del(&ni->ni_list);
1644 * Initialize LNet library.
1646 * Only userspace program needs to call this function - it's automatically
1647 * called in the kernel at module loading time. Caller has to call LNetFini()
1648 * after a call to LNetInit(), if and only if the latter returned 0. It must
1649 * be called exactly once.
1651 * \return 0 on success, and -ve on failures.
1658 lnet_assert_wire_constants();
1659 LASSERT(!the_lnet.ln_init);
1661 memset(&the_lnet, 0, sizeof(the_lnet));
1663 /* refer to global cfs_cpt_table for now */
1664 the_lnet.ln_cpt_table = cfs_cpt_table;
1665 the_lnet.ln_cpt_number = cfs_cpt_number(cfs_cpt_table);
1667 LASSERT(the_lnet.ln_cpt_number > 0);
1668 if (the_lnet.ln_cpt_number > LNET_CPT_MAX) {
1669 /* we are under risk of consuming all lh_cookie */
1670 CERROR("Can't have %d CPTs for LNet (max allowed is %d), "
1671 "please change setting of CPT-table and retry\n",
1672 the_lnet.ln_cpt_number, LNET_CPT_MAX);
1676 while ((1 << the_lnet.ln_cpt_bits) < the_lnet.ln_cpt_number)
1677 the_lnet.ln_cpt_bits++;
1679 rc = lnet_create_locks();
1681 CERROR("Can't create LNet global locks: %d\n", rc);
1685 the_lnet.ln_refcount = 0;
1686 the_lnet.ln_init = 1;
1687 LNetInvalidateHandle(&the_lnet.ln_rc_eqh);
1688 INIT_LIST_HEAD(&the_lnet.ln_lnds);
1689 INIT_LIST_HEAD(&the_lnet.ln_rcd_zombie);
1690 INIT_LIST_HEAD(&the_lnet.ln_rcd_deathrow);
1693 /* The hash table size is the number of bits it takes to express the set
1694 * ln_num_routes, minus 1 (better to under estimate than over so we
1695 * don't waste memory). */
1696 if (rnet_htable_size <= 0)
1697 rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT;
1698 else if (rnet_htable_size > LNET_REMOTE_NETS_HASH_MAX)
1699 rnet_htable_size = LNET_REMOTE_NETS_HASH_MAX;
1700 the_lnet.ln_remote_nets_hbits = max_t(int, 1,
1701 order_base_2(rnet_htable_size) - 1);
1703 /* All LNDs apart from the LOLND are in separate modules. They
1704 * register themselves when their module loads, and unregister
1705 * themselves when their module is unloaded. */
1707 the_lnet.ln_remote_nets_hbits = 8;
1710 * NB the order here determines default 'networks=' order */
1711 # ifdef HAVE_LIBPTHREAD
1712 LNET_REGISTER_ULND(the_tcplnd);
1715 lnet_register_lnd(&the_lolnd);
1718 EXPORT_SYMBOL(LNetInit);
1721 * Finalize LNet library.
1723 * Only userspace program needs to call this function. It can be called
1726 * \pre LNetInit() called with success.
1727 * \pre All LNet users called LNetNIFini() for matching LNetNIInit() calls.
1732 LASSERT(the_lnet.ln_init);
1733 LASSERT(the_lnet.ln_refcount == 0);
1735 while (!list_empty(&the_lnet.ln_lnds))
1736 lnet_unregister_lnd(list_entry(the_lnet.ln_lnds.next,
1738 lnet_destroy_locks();
1740 the_lnet.ln_init = 0;
1742 EXPORT_SYMBOL(LNetFini);
1745 * Set LNet PID and start LNet interfaces, routing, and forwarding.
1747 * Userspace program should call this after a successful call to LNetInit().
1748 * Users must call this function at least once before any other functions.
1749 * For each successful call there must be a corresponding call to
1750 * LNetNIFini(). For subsequent calls to LNetNIInit(), \a requested_pid is
1753 * The PID used by LNet may be different from the one requested.
1756 * \param requested_pid PID requested by the caller.
1758 * \return >= 0 on success, and < 0 error code on failures.
1761 LNetNIInit(lnet_pid_t requested_pid)
1763 int im_a_router = 0;
1768 lnet_ping_info_t *pinfo;
1769 lnet_handle_md_t md_handle;
1770 struct list_head net_head;
1772 INIT_LIST_HEAD(&net_head);
1774 LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
1776 LASSERT(the_lnet.ln_init);
1777 CDEBUG(D_OTHER, "refs %d\n", the_lnet.ln_refcount);
1779 if (the_lnet.ln_refcount > 0) {
1780 rc = the_lnet.ln_refcount++;
1781 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
1785 rc = lnet_prepare(requested_pid);
1789 rc = lnet_parse_networks(&net_head,
1790 !the_lnet.ln_nis_from_mod_params ?
1791 lnet_get_networks() : "");
1795 rc = lnet_startup_lndnis(&net_head, -1, -1, -1, -1, &ni_count);
1799 if (the_lnet.ln_eq_waitni != NULL && ni_count > 1) {
1800 lnd_type = the_lnet.ln_eq_waitni->ni_lnd->lnd_type;
1801 LCONSOLE_ERROR_MSG(0x109, "LND %s can only run single-network"
1803 libcfs_lnd2str(lnd_type));
1807 rc = lnet_parse_routes(lnet_get_routes(), &im_a_router);
1811 rc = lnet_check_routes();
1815 rc = lnet_rtrpools_alloc(im_a_router);
1819 rc = lnet_acceptor_start();
1822 the_lnet.ln_refcount = 1;
1823 /* Now I may use my own API functions... */
1825 rc = lnet_ping_info_setup(&pinfo, &md_handle, ni_count, true);
1829 lnet_ping_target_update(pinfo, md_handle);
1831 rc = lnet_router_checker_start();
1838 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
1843 the_lnet.ln_refcount = 0;
1844 lnet_ping_md_unlink(pinfo, &md_handle);
1845 lnet_ping_info_free(pinfo);
1847 lnet_acceptor_stop();
1848 rc = LNetEQFree(the_lnet.ln_ping_target_eq);
1851 lnet_destroy_routes();
1852 lnet_shutdown_lndnis();
1857 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
1858 while (!list_empty(&net_head)) {
1859 ni = list_entry(net_head.next, struct lnet_ni, ni_list);
1860 list_del_init(&ni->ni_list);
1865 EXPORT_SYMBOL(LNetNIInit);
1868 * Stop LNet interfaces, routing, and forwarding.
1870 * Users must call this function once for each successful call to LNetNIInit().
1871 * Once the LNetNIFini() operation has been started, the results of pending
1872 * API operations are undefined.
1874 * \return always 0 for current implementation.
1879 LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
1881 LASSERT (the_lnet.ln_init);
1882 LASSERT (the_lnet.ln_refcount > 0);
1884 if (the_lnet.ln_refcount != 1) {
1885 the_lnet.ln_refcount--;
1887 LASSERT(!the_lnet.ln_niinit_self);
1892 lnet_router_checker_stop();
1893 lnet_ping_target_fini();
1895 /* Teardown fns that use my own API functions BEFORE here */
1896 the_lnet.ln_refcount = 0;
1898 lnet_acceptor_stop();
1899 lnet_destroy_routes();
1900 lnet_shutdown_lndnis();
1904 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
1907 EXPORT_SYMBOL(LNetNIFini);
1910 * Grabs the ni data from the ni structure and fills the out
1913 * \param[in] ni network interface structure
1914 * \param[out] cpt_count the number of cpts the ni is on
1915 * \param[out] nid Network Interface ID
1916 * \param[out] peer_timeout NI peer timeout
1917 * \param[out] peer_tx_crdits NI peer transmit credits
1918 * \param[out] peer_rtr_credits NI peer router credits
1919 * \param[out] max_tx_credits NI max transmit credit
1920 * \param[out] net_config Network configuration
1923 lnet_fill_ni_info(struct lnet_ni *ni, __u32 *cpt_count, __u64 *nid,
1924 int *peer_timeout, int *peer_tx_credits,
1925 int *peer_rtr_credits, int *max_tx_credits,
1926 struct lnet_ioctl_net_config *net_config)
1933 if (net_config == NULL)
1936 CLASSERT(ARRAY_SIZE(ni->ni_interfaces) ==
1937 ARRAY_SIZE(net_config->ni_interfaces));
1939 if (ni->ni_interfaces[0] != NULL) {
1940 for (i = 0; i < ARRAY_SIZE(ni->ni_interfaces); i++) {
1941 if (ni->ni_interfaces[i] != NULL) {
1942 strncpy(net_config->ni_interfaces[i],
1943 ni->ni_interfaces[i],
1944 sizeof(net_config->ni_interfaces[i]));
1950 *peer_timeout = ni->ni_peertimeout;
1951 *peer_tx_credits = ni->ni_peertxcredits;
1952 *peer_rtr_credits = ni->ni_peerrtrcredits;
1953 *max_tx_credits = ni->ni_maxtxcredits;
1955 net_config->ni_status = ni->ni_status->ns_status;
1958 ni->ni_cpts != NULL && i < ni->ni_ncpts &&
1959 i < LNET_MAX_SHOW_NUM_CPT;
1961 net_config->ni_cpts[i] = ni->ni_cpts[i];
1963 *cpt_count = ni->ni_ncpts;
1967 lnet_get_net_config(int idx, __u32 *cpt_count, __u64 *nid, int *peer_timeout,
1968 int *peer_tx_credits, int *peer_rtr_credits,
1969 int *max_tx_credits,
1970 struct lnet_ioctl_net_config *net_config)
1973 struct list_head *tmp;
1977 cpt = lnet_net_lock_current();
1979 list_for_each(tmp, &the_lnet.ln_nis) {
1980 ni = list_entry(tmp, lnet_ni_t, ni_list);
1984 lnet_fill_ni_info(ni, cpt_count, nid, peer_timeout,
1985 peer_tx_credits, peer_rtr_credits,
1986 max_tx_credits, net_config);
1992 lnet_net_unlock(cpt);
1997 lnet_dyn_add_ni(lnet_pid_t requested_pid, char *nets,
1998 __s32 peer_timeout, __s32 peer_cr, __s32 peer_buf_cr,
2001 lnet_ping_info_t *pinfo;
2002 lnet_handle_md_t md_handle;
2004 struct list_head net_head;
2007 INIT_LIST_HEAD(&net_head);
2009 /* Create a ni structure for the network string */
2010 rc = lnet_parse_networks(&net_head, nets);
2014 LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
2017 rc = -EINVAL; /* only add one interface per call */
2021 rc = lnet_ping_info_setup(&pinfo, &md_handle, 1 + lnet_get_ni_count(),
2026 rc = lnet_startup_lndnis(&net_head, peer_timeout, peer_cr,
2027 peer_buf_cr, credits, NULL);
2031 lnet_ping_target_update(pinfo, md_handle);
2032 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
2037 lnet_ping_md_unlink(pinfo, &md_handle);
2038 lnet_ping_info_free(pinfo);
2040 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
2041 while (!list_empty(&net_head)) {
2042 ni = list_entry(net_head.next, struct lnet_ni, ni_list);
2043 list_del_init(&ni->ni_list);
2050 lnet_dyn_del_ni(__u32 net)
2054 LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
2055 rc = lnet_shutdown_lndni(net);
2056 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
2062 * This is an ugly hack to export IOC_LIBCFS_DEBUG_PEER and
2063 * IOC_LIBCFS_PORTALS_COMPATIBILITY commands to users, by tweaking the LNet
2064 * internal ioctl handler.
2066 * IOC_LIBCFS_PORTALS_COMPATIBILITY is now deprecated, don't use it.
2068 * \param cmd IOC_LIBCFS_DEBUG_PEER to print debugging data about a peer.
2069 * The data will be printed to system console. Don't use it excessively.
2070 * \param arg A pointer to lnet_process_id_t, process ID of the peer.
2072 * \return Always return 0 when called by users directly (i.e., not via ioctl).
2075 LNetCtl(unsigned int cmd, void *arg)
2077 struct libcfs_ioctl_data *data = arg;
2078 struct lnet_ioctl_config_data *config;
2079 lnet_process_id_t id = {0};
2083 CLASSERT(LIBCFS_IOC_DATA_MAX >= sizeof(struct lnet_ioctl_net_config) +
2084 sizeof(struct lnet_ioctl_config_data));
2085 LASSERT(the_lnet.ln_init);
2088 case IOC_LIBCFS_GET_NI:
2089 rc = LNetGetId(data->ioc_count, &id);
2090 data->ioc_nid = id.nid;
2093 case IOC_LIBCFS_FAIL_NID:
2094 return lnet_fail_nid(data->ioc_nid, data->ioc_count);
2096 case IOC_LIBCFS_ADD_ROUTE:
2098 LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
2099 rc = lnet_add_route(config->cfg_net,
2100 config->cfg_config_u.cfg_route.rtr_hop,
2102 config->cfg_config_u.cfg_route.
2104 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
2105 return (rc != 0) ? rc : lnet_check_routes();
2107 case IOC_LIBCFS_DEL_ROUTE:
2109 LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
2110 rc = lnet_del_route(config->cfg_net, config->cfg_nid);
2111 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
2114 case IOC_LIBCFS_GET_ROUTE:
2116 return lnet_get_route(config->cfg_count,
2118 &config->cfg_config_u.cfg_route.rtr_hop,
2120 &config->cfg_config_u.cfg_route.rtr_flags,
2121 &config->cfg_config_u.cfg_route.
2124 case IOC_LIBCFS_GET_NET: {
2125 struct lnet_ioctl_net_config *net_config;
2127 net_config = (struct lnet_ioctl_net_config *)
2129 if (config == NULL || net_config == NULL)
2132 return lnet_get_net_config(config->cfg_count,
2135 &config->cfg_config_u.
2136 cfg_net.net_peer_timeout,
2137 &config->cfg_config_u.cfg_net.
2138 net_peer_tx_credits,
2139 &config->cfg_config_u.cfg_net.
2140 net_peer_rtr_credits,
2141 &config->cfg_config_u.cfg_net.
2146 case IOC_LIBCFS_GET_LNET_STATS:
2148 struct lnet_ioctl_lnet_stats *lnet_stats = arg;
2150 lnet_counters_get(&lnet_stats->st_cntrs);
2154 #if defined(__KERNEL__) && defined(LNET_ROUTER)
2155 case IOC_LIBCFS_CONFIG_RTR:
2157 LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
2158 if (config->cfg_config_u.cfg_buffers.buf_enable) {
2159 rc = lnet_rtrpools_enable();
2160 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
2163 lnet_rtrpools_disable();
2164 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
2167 case IOC_LIBCFS_ADD_BUF:
2169 LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
2170 rc = lnet_rtrpools_adjust(config->cfg_config_u.cfg_buffers.
2172 config->cfg_config_u.cfg_buffers.
2174 config->cfg_config_u.cfg_buffers.
2176 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
2180 case IOC_LIBCFS_GET_BUF: {
2181 struct lnet_ioctl_pool_cfg *pool_cfg;
2183 pool_cfg = (struct lnet_ioctl_pool_cfg *)config->cfg_bulk;
2184 return lnet_get_rtr_pool_cfg(config->cfg_count, pool_cfg);
2187 case IOC_LIBCFS_GET_PEER_INFO: {
2188 struct lnet_ioctl_peer *peer_info = arg;
2189 return lnet_get_peer_info(
2190 peer_info->pr_count,
2192 peer_info->pr_lnd_u.pr_peer_credits.cr_aliveness,
2193 &peer_info->pr_lnd_u.pr_peer_credits.cr_ncpt,
2194 &peer_info->pr_lnd_u.pr_peer_credits.cr_refcount,
2195 &peer_info->pr_lnd_u.pr_peer_credits.cr_ni_peer_tx_credits,
2196 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_credits,
2197 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_rtr_credits,
2198 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_min_rtr_credits,
2199 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_qnob);
2202 case IOC_LIBCFS_NOTIFY_ROUTER:
2203 return lnet_notify(NULL, data->ioc_nid, data->ioc_flags,
2204 cfs_time_current() -
2205 cfs_time_seconds(cfs_time_current_sec() -
2206 (time_t)data->ioc_u64[0]));
2208 case IOC_LIBCFS_PORTALS_COMPATIBILITY:
2209 /* This can be removed once lustre stops calling it */
2212 case IOC_LIBCFS_LNET_DIST:
2213 rc = LNetDist(data->ioc_nid, &data->ioc_nid, &data->ioc_u32[1]);
2214 if (rc < 0 && rc != -EHOSTUNREACH)
2217 data->ioc_u32[0] = rc;
2220 case IOC_LIBCFS_TESTPROTOCOMPAT:
2221 lnet_net_lock(LNET_LOCK_EX);
2222 the_lnet.ln_testprotocompat = data->ioc_flags;
2223 lnet_net_unlock(LNET_LOCK_EX);
2226 case IOC_LIBCFS_LNET_FAULT:
2227 return lnet_fault_ctl(data->ioc_flags, data);
2229 case IOC_LIBCFS_PING:
2230 id.nid = data->ioc_nid;
2231 id.pid = data->ioc_u32[0];
2232 rc = lnet_ping(id, data->ioc_u32[1], /* timeout */
2233 (lnet_process_id_t __user *)data->ioc_pbuf1,
2234 data->ioc_plen1/sizeof(lnet_process_id_t));
2237 data->ioc_count = rc;
2240 case IOC_LIBCFS_DEBUG_PEER: {
2241 /* CAVEAT EMPTOR: this one designed for calling directly; not
2243 id = *((lnet_process_id_t *) arg);
2245 lnet_debug_peer(id.nid);
2247 ni = lnet_net2ni(LNET_NIDNET(id.nid));
2249 CDEBUG(D_WARNING, "No NI for %s\n", libcfs_id2str(id));
2251 if (ni->ni_lnd->lnd_ctl == NULL) {
2252 CDEBUG(D_WARNING, "No ctl for %s\n",
2255 (void)ni->ni_lnd->lnd_ctl(ni, cmd, arg);
2264 ni = lnet_net2ni(data->ioc_net);
2268 if (ni->ni_lnd->lnd_ctl == NULL)
2271 rc = ni->ni_lnd->lnd_ctl(ni, cmd, arg);
2278 EXPORT_SYMBOL(LNetCtl);
2281 * Retrieve the lnet_process_id_t ID of LNet interface at \a index. Note that
2282 * all interfaces share a same PID, as requested by LNetNIInit().
2284 * \param index Index of the interface to look up.
2285 * \param id On successful return, this location will hold the
2286 * lnet_process_id_t ID of the interface.
2288 * \retval 0 If an interface exists at \a index.
2289 * \retval -ENOENT If no interface has been found.
2292 LNetGetId(unsigned int index, lnet_process_id_t *id)
2295 struct list_head *tmp;
2299 LASSERT(the_lnet.ln_init);
2300 LASSERT(the_lnet.ln_refcount > 0);
2302 cpt = lnet_net_lock_current();
2304 list_for_each(tmp, &the_lnet.ln_nis) {
2308 ni = list_entry(tmp, lnet_ni_t, ni_list);
2310 id->nid = ni->ni_nid;
2311 id->pid = the_lnet.ln_pid;
2316 lnet_net_unlock(cpt);
2319 EXPORT_SYMBOL(LNetGetId);
2322 * Print a string representation of handle \a h into buffer \a str of
2326 LNetSnprintHandle(char *str, int len, lnet_handle_any_t h)
2328 snprintf(str, len, LPX64, h.cookie);
2330 EXPORT_SYMBOL(LNetSnprintHandle);
2333 lnet_ping(lnet_process_id_t id, int timeout_ms, lnet_process_id_t __user *ids,
2336 lnet_handle_eq_t eqh;
2337 lnet_handle_md_t mdh;
2343 const int a_long_time = 60000; /* mS */
2345 lnet_ping_info_t *info;
2346 lnet_process_id_t tmpid;
2353 infosz = offsetof(lnet_ping_info_t, pi_ni[n_ids]);
2356 id.nid == LNET_NID_ANY ||
2357 timeout_ms > 500000 || /* arbitrary limit! */
2358 n_ids > 20) /* arbitrary limit! */
2361 if (id.pid == LNET_PID_ANY)
2362 id.pid = LNET_PID_LUSTRE;
2364 LIBCFS_ALLOC(info, infosz);
2368 /* NB 2 events max (including any unlink event) */
2369 rc = LNetEQAlloc(2, LNET_EQ_HANDLER_NONE, &eqh);
2371 CERROR("Can't allocate EQ: %d\n", rc);
2375 /* initialize md content */
2378 md.threshold = 2; /*GET/REPLY*/
2380 md.options = LNET_MD_TRUNCATE;
2384 rc = LNetMDBind(md, LNET_UNLINK, &mdh);
2386 CERROR("Can't bind MD: %d\n", rc);
2390 rc = LNetGet(LNET_NID_ANY, mdh, id,
2391 LNET_RESERVED_PORTAL,
2392 LNET_PROTO_PING_MATCHBITS, 0);
2395 /* Don't CERROR; this could be deliberate! */
2397 rc2 = LNetMDUnlink(mdh);
2400 /* NB must wait for the UNLINK event below... */
2402 timeout_ms = a_long_time;
2406 /* MUST block for unlink to complete */
2408 blocked = cfs_block_allsigs();
2410 rc2 = LNetEQPoll(&eqh, 1, timeout_ms, &event, &which);
2413 cfs_restore_sigs(blocked);
2415 CDEBUG(D_NET, "poll %d(%d %d)%s\n", rc2,
2416 (rc2 <= 0) ? -1 : event.type,
2417 (rc2 <= 0) ? -1 : event.status,
2418 (rc2 > 0 && event.unlinked) ? " unlinked" : "");
2420 LASSERT(rc2 != -EOVERFLOW); /* can't miss anything */
2422 if (rc2 <= 0 || event.status != 0) {
2423 /* timeout or error */
2424 if (!replied && rc == 0)
2425 rc = (rc2 < 0) ? rc2 :
2426 (rc2 == 0) ? -ETIMEDOUT :
2430 /* Ensure completion in finite time... */
2432 /* No assertion (racing with network) */
2434 timeout_ms = a_long_time;
2435 } else if (rc2 == 0) {
2436 /* timed out waiting for unlink */
2437 CWARN("ping %s: late network completion\n",
2440 } else if (event.type == LNET_EVENT_REPLY) {
2445 } while (rc2 <= 0 || !event.unlinked);
2449 CWARN("%s: Unexpected rc >= 0 but no reply!\n",
2456 LASSERT(nob >= 0 && nob <= infosz);
2458 rc = -EPROTO; /* if I can't parse... */
2461 /* can't check magic/version */
2462 CERROR("%s: ping info too short %d\n",
2463 libcfs_id2str(id), nob);
2467 if (info->pi_magic == __swab32(LNET_PROTO_PING_MAGIC)) {
2468 lnet_swap_pinginfo(info);
2469 } else if (info->pi_magic != LNET_PROTO_PING_MAGIC) {
2470 CERROR("%s: Unexpected magic %08x\n",
2471 libcfs_id2str(id), info->pi_magic);
2475 if ((info->pi_features & LNET_PING_FEAT_NI_STATUS) == 0) {
2476 CERROR("%s: ping w/o NI status: 0x%x\n",
2477 libcfs_id2str(id), info->pi_features);
2481 if (nob < offsetof(lnet_ping_info_t, pi_ni[0])) {
2482 CERROR("%s: Short reply %d(%d min)\n", libcfs_id2str(id),
2483 nob, (int)offsetof(lnet_ping_info_t, pi_ni[0]));
2487 if (info->pi_nnis < n_ids)
2488 n_ids = info->pi_nnis;
2490 if (nob < offsetof(lnet_ping_info_t, pi_ni[n_ids])) {
2491 CERROR("%s: Short reply %d(%d expected)\n", libcfs_id2str(id),
2492 nob, (int)offsetof(lnet_ping_info_t, pi_ni[n_ids]));
2496 rc = -EFAULT; /* If I SEGV... */
2498 for (i = 0; i < n_ids; i++) {
2499 tmpid.pid = info->pi_pid;
2500 tmpid.nid = info->pi_ni[i].ns_nid;
2501 if (copy_to_user(&ids[i], &tmpid, sizeof(tmpid)))
2507 rc2 = LNetEQFree(eqh);
2509 CERROR("rc2 %d\n", rc2);
2513 LIBCFS_FREE(info, infosz);