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>
40 #include <linux/log2.h>
44 #define D_LNI D_CONSOLE
46 #define D_LNI D_CONFIG
49 lnet_t the_lnet; /* THE state of the network */
50 EXPORT_SYMBOL(the_lnet);
54 static char *ip2nets = "";
55 CFS_MODULE_PARM(ip2nets, "s", charp, 0444,
56 "LNET network <- IP table");
58 static char *networks = "";
59 CFS_MODULE_PARM(networks, "s", charp, 0444,
62 static char *routes = "";
63 CFS_MODULE_PARM(routes, "s", charp, 0444,
64 "routes to non-local networks");
66 static int rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT;
67 CFS_MODULE_PARM(rnet_htable_size, "i", int, 0444,
68 "size of remote network hash table");
77 lnet_get_networks(void)
82 if (*networks != 0 && *ip2nets != 0) {
83 LCONSOLE_ERROR_MSG(0x101, "Please specify EITHER 'networks' or "
84 "'ip2nets' but not both at once\n");
89 rc = lnet_parse_ip2nets(&nets, ip2nets);
90 return (rc == 0) ? nets : NULL;
100 lnet_init_locks(void)
102 spin_lock_init(&the_lnet.ln_eq_wait_lock);
103 init_waitqueue_head(&the_lnet.ln_eq_waitq);
104 mutex_init(&the_lnet.ln_lnd_mutex);
105 mutex_init(&the_lnet.ln_api_mutex);
109 lnet_fini_locks(void)
116 lnet_get_routes(void)
118 char *str = getenv("LNET_ROUTES");
120 return (str == NULL) ? "" : str;
124 lnet_get_networks (void)
126 static char default_networks[256];
127 char *networks = getenv("LNET_NETWORKS");
132 struct list_head *tmp;
134 if (networks != NULL)
137 /* In userland, the default 'networks=' is the list of known net types */
138 len = sizeof(default_networks);
139 str = default_networks;
143 list_for_each(tmp, &the_lnet.ln_lnds) {
144 lnd_t *lnd = list_entry(tmp, lnd_t, lnd_list);
146 nob = snprintf(str, len, "%s%s", sep,
147 libcfs_lnd2str(lnd->lnd_type));
149 /* overflowed the string; leave it where it was */
158 return default_networks;
161 # ifndef HAVE_LIBPTHREAD
163 void lnet_init_locks(void)
165 the_lnet.ln_eq_wait_lock = 0;
166 the_lnet.ln_lnd_mutex = 0;
167 the_lnet.ln_api_mutex = 0;
170 void lnet_fini_locks(void)
172 LASSERT(the_lnet.ln_api_mutex == 0);
173 LASSERT(the_lnet.ln_lnd_mutex == 0);
174 LASSERT(the_lnet.ln_eq_wait_lock == 0);
179 void lnet_init_locks(void)
181 pthread_cond_init(&the_lnet.ln_eq_cond, NULL);
182 pthread_mutex_init(&the_lnet.ln_eq_wait_lock, NULL);
183 pthread_mutex_init(&the_lnet.ln_lnd_mutex, NULL);
184 pthread_mutex_init(&the_lnet.ln_api_mutex, NULL);
187 void lnet_fini_locks(void)
189 pthread_mutex_destroy(&the_lnet.ln_api_mutex);
190 pthread_mutex_destroy(&the_lnet.ln_lnd_mutex);
191 pthread_mutex_destroy(&the_lnet.ln_eq_wait_lock);
192 pthread_cond_destroy(&the_lnet.ln_eq_cond);
199 lnet_create_remote_nets_table(void)
202 struct list_head *hash;
204 LASSERT(the_lnet.ln_remote_nets_hash == NULL);
205 LASSERT(the_lnet.ln_remote_nets_hbits > 0);
206 LIBCFS_ALLOC(hash, LNET_REMOTE_NETS_HASH_SIZE * sizeof(*hash));
208 CERROR("Failed to create remote nets hash table\n");
212 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++)
213 INIT_LIST_HEAD(&hash[i]);
214 the_lnet.ln_remote_nets_hash = hash;
219 lnet_destroy_remote_nets_table(void)
223 if (the_lnet.ln_remote_nets_hash == NULL)
226 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++)
227 LASSERT(list_empty(&the_lnet.ln_remote_nets_hash[i]));
229 LIBCFS_FREE(the_lnet.ln_remote_nets_hash,
230 LNET_REMOTE_NETS_HASH_SIZE *
231 sizeof(the_lnet.ln_remote_nets_hash[0]));
232 the_lnet.ln_remote_nets_hash = NULL;
236 lnet_destroy_locks(void)
238 if (the_lnet.ln_res_lock != NULL) {
239 cfs_percpt_lock_free(the_lnet.ln_res_lock);
240 the_lnet.ln_res_lock = NULL;
243 if (the_lnet.ln_net_lock != NULL) {
244 cfs_percpt_lock_free(the_lnet.ln_net_lock);
245 the_lnet.ln_net_lock = NULL;
252 lnet_create_locks(void)
256 the_lnet.ln_res_lock = cfs_percpt_lock_alloc(lnet_cpt_table());
257 if (the_lnet.ln_res_lock == NULL)
260 the_lnet.ln_net_lock = cfs_percpt_lock_alloc(lnet_cpt_table());
261 if (the_lnet.ln_net_lock == NULL)
267 lnet_destroy_locks();
271 void lnet_assert_wire_constants (void)
273 /* Wire protocol assertions generated by 'wirecheck'
274 * running on Linux robert.bartonsoftware.com 2.6.8-1.521
275 * #1 Mon Aug 16 09:01:18 EDT 2004 i686 athlon i386 GNU/Linux
276 * with gcc version 3.3.3 20040412 (Red Hat Linux 3.3.3-7) */
279 CLASSERT (LNET_PROTO_TCP_MAGIC == 0xeebc0ded);
280 CLASSERT (LNET_PROTO_TCP_VERSION_MAJOR == 1);
281 CLASSERT (LNET_PROTO_TCP_VERSION_MINOR == 0);
282 CLASSERT (LNET_MSG_ACK == 0);
283 CLASSERT (LNET_MSG_PUT == 1);
284 CLASSERT (LNET_MSG_GET == 2);
285 CLASSERT (LNET_MSG_REPLY == 3);
286 CLASSERT (LNET_MSG_HELLO == 4);
288 /* Checks for struct ptl_handle_wire_t */
289 CLASSERT ((int)sizeof(lnet_handle_wire_t) == 16);
290 CLASSERT ((int)offsetof(lnet_handle_wire_t, wh_interface_cookie) == 0);
291 CLASSERT ((int)sizeof(((lnet_handle_wire_t *)0)->wh_interface_cookie) == 8);
292 CLASSERT ((int)offsetof(lnet_handle_wire_t, wh_object_cookie) == 8);
293 CLASSERT ((int)sizeof(((lnet_handle_wire_t *)0)->wh_object_cookie) == 8);
295 /* Checks for struct lnet_magicversion_t */
296 CLASSERT ((int)sizeof(lnet_magicversion_t) == 8);
297 CLASSERT ((int)offsetof(lnet_magicversion_t, magic) == 0);
298 CLASSERT ((int)sizeof(((lnet_magicversion_t *)0)->magic) == 4);
299 CLASSERT ((int)offsetof(lnet_magicversion_t, version_major) == 4);
300 CLASSERT ((int)sizeof(((lnet_magicversion_t *)0)->version_major) == 2);
301 CLASSERT ((int)offsetof(lnet_magicversion_t, version_minor) == 6);
302 CLASSERT ((int)sizeof(((lnet_magicversion_t *)0)->version_minor) == 2);
304 /* Checks for struct lnet_hdr_t */
305 CLASSERT ((int)sizeof(lnet_hdr_t) == 72);
306 CLASSERT ((int)offsetof(lnet_hdr_t, dest_nid) == 0);
307 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->dest_nid) == 8);
308 CLASSERT ((int)offsetof(lnet_hdr_t, src_nid) == 8);
309 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->src_nid) == 8);
310 CLASSERT ((int)offsetof(lnet_hdr_t, dest_pid) == 16);
311 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->dest_pid) == 4);
312 CLASSERT ((int)offsetof(lnet_hdr_t, src_pid) == 20);
313 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->src_pid) == 4);
314 CLASSERT ((int)offsetof(lnet_hdr_t, type) == 24);
315 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->type) == 4);
316 CLASSERT ((int)offsetof(lnet_hdr_t, payload_length) == 28);
317 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->payload_length) == 4);
318 CLASSERT ((int)offsetof(lnet_hdr_t, msg) == 32);
319 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg) == 40);
322 CLASSERT ((int)offsetof(lnet_hdr_t, msg.ack.dst_wmd) == 32);
323 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.ack.dst_wmd) == 16);
324 CLASSERT ((int)offsetof(lnet_hdr_t, msg.ack.match_bits) == 48);
325 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.ack.match_bits) == 8);
326 CLASSERT ((int)offsetof(lnet_hdr_t, msg.ack.mlength) == 56);
327 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.ack.mlength) == 4);
330 CLASSERT ((int)offsetof(lnet_hdr_t, msg.put.ack_wmd) == 32);
331 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.put.ack_wmd) == 16);
332 CLASSERT ((int)offsetof(lnet_hdr_t, msg.put.match_bits) == 48);
333 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.put.match_bits) == 8);
334 CLASSERT ((int)offsetof(lnet_hdr_t, msg.put.hdr_data) == 56);
335 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.put.hdr_data) == 8);
336 CLASSERT ((int)offsetof(lnet_hdr_t, msg.put.ptl_index) == 64);
337 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.put.ptl_index) == 4);
338 CLASSERT ((int)offsetof(lnet_hdr_t, msg.put.offset) == 68);
339 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.put.offset) == 4);
342 CLASSERT ((int)offsetof(lnet_hdr_t, msg.get.return_wmd) == 32);
343 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.get.return_wmd) == 16);
344 CLASSERT ((int)offsetof(lnet_hdr_t, msg.get.match_bits) == 48);
345 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.get.match_bits) == 8);
346 CLASSERT ((int)offsetof(lnet_hdr_t, msg.get.ptl_index) == 56);
347 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.get.ptl_index) == 4);
348 CLASSERT ((int)offsetof(lnet_hdr_t, msg.get.src_offset) == 60);
349 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.get.src_offset) == 4);
350 CLASSERT ((int)offsetof(lnet_hdr_t, msg.get.sink_length) == 64);
351 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.get.sink_length) == 4);
354 CLASSERT ((int)offsetof(lnet_hdr_t, msg.reply.dst_wmd) == 32);
355 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.reply.dst_wmd) == 16);
358 CLASSERT ((int)offsetof(lnet_hdr_t, msg.hello.incarnation) == 32);
359 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.hello.incarnation) == 8);
360 CLASSERT ((int)offsetof(lnet_hdr_t, msg.hello.type) == 40);
361 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.hello.type) == 4);
365 lnet_find_lnd_by_type (int type)
368 struct list_head *tmp;
370 /* holding lnd mutex */
371 list_for_each(tmp, &the_lnet.ln_lnds) {
372 lnd = list_entry(tmp, lnd_t, lnd_list);
374 if ((int)lnd->lnd_type == type)
381 lnet_register_lnd (lnd_t *lnd)
383 LNET_MUTEX_LOCK(&the_lnet.ln_lnd_mutex);
385 LASSERT(the_lnet.ln_init);
386 LASSERT(libcfs_isknown_lnd(lnd->lnd_type));
387 LASSERT(lnet_find_lnd_by_type(lnd->lnd_type) == NULL);
389 list_add_tail(&lnd->lnd_list, &the_lnet.ln_lnds);
390 lnd->lnd_refcount = 0;
392 CDEBUG(D_NET, "%s LND registered\n", libcfs_lnd2str(lnd->lnd_type));
394 LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
396 EXPORT_SYMBOL(lnet_register_lnd);
399 lnet_unregister_lnd (lnd_t *lnd)
401 LNET_MUTEX_LOCK(&the_lnet.ln_lnd_mutex);
403 LASSERT(the_lnet.ln_init);
404 LASSERT(lnet_find_lnd_by_type(lnd->lnd_type) == lnd);
405 LASSERT(lnd->lnd_refcount == 0);
407 list_del(&lnd->lnd_list);
408 CDEBUG(D_NET, "%s LND unregistered\n", libcfs_lnd2str(lnd->lnd_type));
410 LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
412 EXPORT_SYMBOL(lnet_unregister_lnd);
415 lnet_counters_get(lnet_counters_t *counters)
417 lnet_counters_t *ctr;
420 memset(counters, 0, sizeof(*counters));
422 lnet_net_lock(LNET_LOCK_EX);
424 cfs_percpt_for_each(ctr, i, the_lnet.ln_counters) {
425 counters->msgs_max += ctr->msgs_max;
426 counters->msgs_alloc += ctr->msgs_alloc;
427 counters->errors += ctr->errors;
428 counters->send_count += ctr->send_count;
429 counters->recv_count += ctr->recv_count;
430 counters->route_count += ctr->route_count;
431 counters->drop_count += ctr->drop_count;
432 counters->send_length += ctr->send_length;
433 counters->recv_length += ctr->recv_length;
434 counters->route_length += ctr->route_length;
435 counters->drop_length += ctr->drop_length;
438 lnet_net_unlock(LNET_LOCK_EX);
440 EXPORT_SYMBOL(lnet_counters_get);
443 lnet_counters_reset(void)
445 lnet_counters_t *counters;
448 lnet_net_lock(LNET_LOCK_EX);
450 cfs_percpt_for_each(counters, i, the_lnet.ln_counters)
451 memset(counters, 0, sizeof(lnet_counters_t));
453 lnet_net_unlock(LNET_LOCK_EX);
455 EXPORT_SYMBOL(lnet_counters_reset);
457 #ifdef LNET_USE_LIB_FREELIST
460 lnet_freelist_init(lnet_freelist_t *fl, int n, int size)
466 size += offsetof (lnet_freeobj_t, fo_contents);
468 LIBCFS_ALLOC(space, n * size);
472 INIT_LIST_HEAD(&fl->fl_list);
475 fl->fl_objsize = size;
478 memset(space, 0, size);
479 list_add((struct list_head *)space, &fl->fl_list);
487 lnet_freelist_fini(lnet_freelist_t *fl)
489 struct list_head *el;
492 if (fl->fl_nobjs == 0)
496 for (el = fl->fl_list.next; el != &fl->fl_list; el = el->next)
499 LASSERT (count == fl->fl_nobjs);
501 LIBCFS_FREE(fl->fl_objs, fl->fl_nobjs * fl->fl_objsize);
502 memset (fl, 0, sizeof (*fl));
505 #endif /* LNET_USE_LIB_FREELIST */
507 __u64 lnet_create_interface_cookie (void)
509 /* NB the interface cookie in wire handles guards against delayed
510 * replies and ACKs appearing valid after reboot. Initialisation time,
511 * even if it's only implemented to millisecond resolution is probably
512 * easily good enough. */
516 int rc = gettimeofday (&tv, NULL);
519 do_gettimeofday(&tv);
523 cookie += tv.tv_usec;
528 lnet_res_type2str(int type)
533 case LNET_COOKIE_TYPE_MD:
535 case LNET_COOKIE_TYPE_ME:
537 case LNET_COOKIE_TYPE_EQ:
543 lnet_res_container_cleanup(struct lnet_res_container *rec)
547 if (rec->rec_type == 0) /* not set yet, it's uninitialized */
550 while (!list_empty(&rec->rec_active)) {
551 struct list_head *e = rec->rec_active.next;
554 if (rec->rec_type == LNET_COOKIE_TYPE_EQ) {
555 lnet_eq_free(list_entry(e, lnet_eq_t, eq_list));
557 } else if (rec->rec_type == LNET_COOKIE_TYPE_MD) {
558 lnet_md_free(list_entry(e, lnet_libmd_t, md_list));
560 } else { /* NB: Active MEs should be attached on portals */
567 /* Found alive MD/ME/EQ, user really should unlink/free
568 * all of them before finalize LNet, but if someone didn't,
569 * we have to recycle garbage for him */
570 CERROR("%d active elements on exit of %s container\n",
571 count, lnet_res_type2str(rec->rec_type));
574 #ifdef LNET_USE_LIB_FREELIST
575 lnet_freelist_fini(&rec->rec_freelist);
577 if (rec->rec_lh_hash != NULL) {
578 LIBCFS_FREE(rec->rec_lh_hash,
579 LNET_LH_HASH_SIZE * sizeof(rec->rec_lh_hash[0]));
580 rec->rec_lh_hash = NULL;
583 rec->rec_type = 0; /* mark it as finalized */
587 lnet_res_container_setup(struct lnet_res_container *rec,
588 int cpt, int type, int objnum, int objsz)
593 LASSERT(rec->rec_type == 0);
595 rec->rec_type = type;
596 INIT_LIST_HEAD(&rec->rec_active);
598 #ifdef LNET_USE_LIB_FREELIST
599 memset(&rec->rec_freelist, 0, sizeof(rec->rec_freelist));
600 rc = lnet_freelist_init(&rec->rec_freelist, objnum, objsz);
604 rec->rec_lh_cookie = (cpt << LNET_COOKIE_TYPE_BITS) | type;
606 /* Arbitrary choice of hash table size */
607 LIBCFS_CPT_ALLOC(rec->rec_lh_hash, lnet_cpt_table(), cpt,
608 LNET_LH_HASH_SIZE * sizeof(rec->rec_lh_hash[0]));
609 if (rec->rec_lh_hash == NULL) {
614 for (i = 0; i < LNET_LH_HASH_SIZE; i++)
615 INIT_LIST_HEAD(&rec->rec_lh_hash[i]);
620 CERROR("Failed to setup %s resource container\n",
621 lnet_res_type2str(type));
622 lnet_res_container_cleanup(rec);
627 lnet_res_containers_destroy(struct lnet_res_container **recs)
629 struct lnet_res_container *rec;
632 cfs_percpt_for_each(rec, i, recs)
633 lnet_res_container_cleanup(rec);
635 cfs_percpt_free(recs);
638 static struct lnet_res_container **
639 lnet_res_containers_create(int type, int objnum, int objsz)
641 struct lnet_res_container **recs;
642 struct lnet_res_container *rec;
646 recs = cfs_percpt_alloc(lnet_cpt_table(), sizeof(*rec));
648 CERROR("Failed to allocate %s resource containers\n",
649 lnet_res_type2str(type));
653 cfs_percpt_for_each(rec, i, recs) {
654 rc = lnet_res_container_setup(rec, i, type, objnum, objsz);
656 lnet_res_containers_destroy(recs);
665 lnet_res_lh_lookup(struct lnet_res_container *rec, __u64 cookie)
667 /* ALWAYS called with lnet_res_lock held */
668 struct list_head *head;
669 lnet_libhandle_t *lh;
672 if ((cookie & LNET_COOKIE_MASK) != rec->rec_type)
675 hash = cookie >> (LNET_COOKIE_TYPE_BITS + LNET_CPT_BITS);
676 head = &rec->rec_lh_hash[hash & LNET_LH_HASH_MASK];
678 list_for_each_entry(lh, head, lh_hash_chain) {
679 if (lh->lh_cookie == cookie)
687 lnet_res_lh_initialize(struct lnet_res_container *rec, lnet_libhandle_t *lh)
689 /* ALWAYS called with lnet_res_lock held */
690 unsigned int ibits = LNET_COOKIE_TYPE_BITS + LNET_CPT_BITS;
693 lh->lh_cookie = rec->rec_lh_cookie;
694 rec->rec_lh_cookie += 1 << ibits;
696 hash = (lh->lh_cookie >> ibits) & LNET_LH_HASH_MASK;
698 list_add(&lh->lh_hash_chain, &rec->rec_lh_hash[hash]);
703 * Reserved API - do not use.
704 * Temporary workaround to allow uOSS and test programs force server
705 * mode in userspace. See comments near ln_server_mode_flag in
706 * lnet/lib-types.h */
710 the_lnet.ln_server_mode_flag = 1;
714 int lnet_unprepare(void);
717 lnet_prepare(lnet_pid_t requested_pid)
719 /* Prepare to bring up the network */
720 struct lnet_res_container **recs;
723 LASSERT (the_lnet.ln_refcount == 0);
725 the_lnet.ln_routing = 0;
728 LASSERT ((requested_pid & LNET_PID_USERFLAG) == 0);
729 the_lnet.ln_pid = requested_pid;
731 if (the_lnet.ln_server_mode_flag) {/* server case (uOSS) */
732 LASSERT ((requested_pid & LNET_PID_USERFLAG) == 0);
734 if (current_uid() != 0) /* Only root can run user-space server */
736 the_lnet.ln_pid = requested_pid;
738 } else {/* client case (liblustre) */
740 /* My PID must be unique on this node and flag I'm userspace */
741 the_lnet.ln_pid = getpid() | LNET_PID_USERFLAG;
745 INIT_LIST_HEAD(&the_lnet.ln_test_peers);
746 INIT_LIST_HEAD(&the_lnet.ln_nis);
747 INIT_LIST_HEAD(&the_lnet.ln_nis_cpt);
748 INIT_LIST_HEAD(&the_lnet.ln_nis_zombie);
749 INIT_LIST_HEAD(&the_lnet.ln_routers);
751 rc = lnet_create_remote_nets_table();
755 the_lnet.ln_interface_cookie = lnet_create_interface_cookie();
757 the_lnet.ln_counters = cfs_percpt_alloc(lnet_cpt_table(),
758 sizeof(lnet_counters_t));
759 if (the_lnet.ln_counters == NULL) {
760 CERROR("Failed to allocate counters for LNet\n");
765 rc = lnet_peer_tables_create();
769 rc = lnet_msg_containers_create();
773 rc = lnet_res_container_setup(&the_lnet.ln_eq_container, 0,
774 LNET_COOKIE_TYPE_EQ, LNET_FL_MAX_EQS,
779 recs = lnet_res_containers_create(LNET_COOKIE_TYPE_ME, LNET_FL_MAX_MES,
784 the_lnet.ln_me_containers = recs;
786 recs = lnet_res_containers_create(LNET_COOKIE_TYPE_MD, LNET_FL_MAX_MDS,
787 sizeof(lnet_libmd_t));
791 the_lnet.ln_md_containers = recs;
793 rc = lnet_portals_create();
795 CERROR("Failed to create portals for LNet: %d\n", rc);
807 lnet_unprepare (void)
809 /* NB no LNET_LOCK since this is the last reference. All LND instances
810 * have shut down already, so it is safe to unlink and free all
811 * descriptors, even those that appear committed to a network op (eg MD
812 * with non-zero pending count) */
814 lnet_fail_nid(LNET_NID_ANY, 0);
816 LASSERT(the_lnet.ln_refcount == 0);
817 LASSERT(list_empty(&the_lnet.ln_test_peers));
818 LASSERT(list_empty(&the_lnet.ln_nis));
819 LASSERT(list_empty(&the_lnet.ln_nis_cpt));
820 LASSERT(list_empty(&the_lnet.ln_nis_zombie));
822 lnet_portals_destroy();
824 if (the_lnet.ln_md_containers != NULL) {
825 lnet_res_containers_destroy(the_lnet.ln_md_containers);
826 the_lnet.ln_md_containers = NULL;
829 if (the_lnet.ln_me_containers != NULL) {
830 lnet_res_containers_destroy(the_lnet.ln_me_containers);
831 the_lnet.ln_me_containers = NULL;
834 lnet_res_container_cleanup(&the_lnet.ln_eq_container);
836 lnet_msg_containers_destroy();
837 lnet_peer_tables_destroy();
838 lnet_rtrpools_free();
840 if (the_lnet.ln_counters != NULL) {
841 cfs_percpt_free(the_lnet.ln_counters);
842 the_lnet.ln_counters = NULL;
844 lnet_destroy_remote_nets_table();
850 lnet_net2ni_locked(__u32 net, int cpt)
852 struct list_head *tmp;
855 LASSERT(cpt != LNET_LOCK_EX);
857 list_for_each(tmp, &the_lnet.ln_nis) {
858 ni = list_entry(tmp, lnet_ni_t, ni_list);
860 if (LNET_NIDNET(ni->ni_nid) == net) {
861 lnet_ni_addref_locked(ni, cpt);
870 lnet_net2ni(__u32 net)
875 ni = lnet_net2ni_locked(net, 0);
880 EXPORT_SYMBOL(lnet_net2ni);
883 lnet_nid_cpt_hash(lnet_nid_t nid, unsigned int number)
888 LASSERT(number >= 1 && number <= LNET_CPT_NUMBER);
893 val = hash_long(key, LNET_CPT_BITS);
894 /* NB: LNET_CP_NUMBER doesn't have to be PO2 */
898 return (unsigned int)(key + val + (val >> 1)) % number;
902 lnet_cpt_of_nid_locked(lnet_nid_t nid)
906 /* must called with hold of lnet_net_lock */
907 if (LNET_CPT_NUMBER == 1)
908 return 0; /* the only one */
910 /* take lnet_net_lock(any) would be OK */
911 if (!list_empty(&the_lnet.ln_nis_cpt)) {
912 list_for_each_entry(ni, &the_lnet.ln_nis_cpt, ni_cptlist) {
913 if (LNET_NIDNET(ni->ni_nid) != LNET_NIDNET(nid))
916 LASSERT(ni->ni_cpts != NULL);
917 return ni->ni_cpts[lnet_nid_cpt_hash
918 (nid, ni->ni_ncpts)];
922 return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
926 lnet_cpt_of_nid(lnet_nid_t nid)
931 if (LNET_CPT_NUMBER == 1)
932 return 0; /* the only one */
934 if (list_empty(&the_lnet.ln_nis_cpt))
935 return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
937 cpt = lnet_net_lock_current();
938 cpt2 = lnet_cpt_of_nid_locked(nid);
939 lnet_net_unlock(cpt);
943 EXPORT_SYMBOL(lnet_cpt_of_nid);
946 lnet_islocalnet(__u32 net)
951 cpt = lnet_net_lock_current();
953 ni = lnet_net2ni_locked(net, cpt);
955 lnet_ni_decref_locked(ni, cpt);
957 lnet_net_unlock(cpt);
963 lnet_nid2ni_locked(lnet_nid_t nid, int cpt)
966 struct list_head *tmp;
968 LASSERT(cpt != LNET_LOCK_EX);
970 list_for_each(tmp, &the_lnet.ln_nis) {
971 ni = list_entry(tmp, lnet_ni_t, ni_list);
973 if (ni->ni_nid == nid) {
974 lnet_ni_addref_locked(ni, cpt);
983 lnet_islocalnid(lnet_nid_t nid)
988 cpt = lnet_net_lock_current();
989 ni = lnet_nid2ni_locked(nid, cpt);
991 lnet_ni_decref_locked(ni, cpt);
992 lnet_net_unlock(cpt);
998 lnet_count_acceptor_nis (void)
1000 /* Return the # of NIs that need the acceptor. */
1002 #if defined(__KERNEL__) || defined(HAVE_LIBPTHREAD)
1003 struct list_head *tmp;
1007 cpt = lnet_net_lock_current();
1008 list_for_each(tmp, &the_lnet.ln_nis) {
1009 ni = list_entry(tmp, lnet_ni_t, ni_list);
1011 if (ni->ni_lnd->lnd_accept != NULL)
1015 lnet_net_unlock(cpt);
1017 #endif /* defined(__KERNEL__) || defined(HAVE_LIBPTHREAD) */
1022 lnet_ni_tq_credits(lnet_ni_t *ni)
1026 LASSERT(ni->ni_ncpts >= 1);
1028 if (ni->ni_ncpts == 1)
1029 return ni->ni_maxtxcredits;
1031 credits = ni->ni_maxtxcredits / ni->ni_ncpts;
1032 credits = max(credits, 8 * ni->ni_peertxcredits);
1033 credits = min(credits, ni->ni_maxtxcredits);
1039 lnet_shutdown_lndnis (void)
1045 /* NB called holding the global mutex */
1047 /* All quiet on the API front */
1048 LASSERT(!the_lnet.ln_shutdown);
1049 LASSERT(the_lnet.ln_refcount == 0);
1050 LASSERT(list_empty(&the_lnet.ln_nis_zombie));
1052 lnet_net_lock(LNET_LOCK_EX);
1053 the_lnet.ln_shutdown = 1; /* flag shutdown */
1055 /* Unlink NIs from the global table */
1056 while (!list_empty(&the_lnet.ln_nis)) {
1057 ni = list_entry(the_lnet.ln_nis.next,
1058 lnet_ni_t, ni_list);
1059 /* move it to zombie list and nobody can find it anymore */
1060 list_move(&ni->ni_list, &the_lnet.ln_nis_zombie);
1061 lnet_ni_decref_locked(ni, 0); /* drop ln_nis' ref */
1063 if (!list_empty(&ni->ni_cptlist)) {
1064 list_del_init(&ni->ni_cptlist);
1065 lnet_ni_decref_locked(ni, 0);
1069 /* Drop the cached eqwait NI. */
1070 if (the_lnet.ln_eq_waitni != NULL) {
1071 lnet_ni_decref_locked(the_lnet.ln_eq_waitni, 0);
1072 the_lnet.ln_eq_waitni = NULL;
1075 /* Drop the cached loopback NI. */
1076 if (the_lnet.ln_loni != NULL) {
1077 lnet_ni_decref_locked(the_lnet.ln_loni, 0);
1078 the_lnet.ln_loni = NULL;
1081 lnet_net_unlock(LNET_LOCK_EX);
1083 /* Clear lazy portals and drop delayed messages which hold refs
1084 * on their lnet_msg_t::msg_rxpeer */
1085 for (i = 0; i < the_lnet.ln_nportals; i++)
1086 LNetClearLazyPortal(i);
1088 /* Clear the peer table and wait for all peers to go (they hold refs on
1090 lnet_peer_tables_cleanup();
1092 lnet_net_lock(LNET_LOCK_EX);
1093 /* Now wait for the NI's I just nuked to show up on ln_zombie_nis
1094 * and shut them down in guaranteed thread context */
1096 while (!list_empty(&the_lnet.ln_nis_zombie)) {
1100 ni = list_entry(the_lnet.ln_nis_zombie.next,
1101 lnet_ni_t, ni_list);
1102 list_del_init(&ni->ni_list);
1103 cfs_percpt_for_each(ref, j, ni->ni_refs) {
1106 /* still busy, add it back to zombie list */
1107 list_add(&ni->ni_list, &the_lnet.ln_nis_zombie);
1111 if (!list_empty(&ni->ni_list)) {
1112 lnet_net_unlock(LNET_LOCK_EX);
1114 if ((i & (-i)) == i) {
1115 CDEBUG(D_WARNING, "Waiting for zombie LNI %s\n",
1116 libcfs_nid2str(ni->ni_nid));
1118 cfs_pause(cfs_time_seconds(1));
1119 lnet_net_lock(LNET_LOCK_EX);
1123 ni->ni_lnd->lnd_refcount--;
1124 lnet_net_unlock(LNET_LOCK_EX);
1126 islo = ni->ni_lnd->lnd_type == LOLND;
1128 LASSERT (!in_interrupt ());
1129 (ni->ni_lnd->lnd_shutdown)(ni);
1131 /* can't deref lnd anymore now; it might have unregistered
1135 CDEBUG(D_LNI, "Removed LNI %s\n",
1136 libcfs_nid2str(ni->ni_nid));
1141 lnet_net_lock(LNET_LOCK_EX);
1144 the_lnet.ln_shutdown = 0;
1145 lnet_net_unlock(LNET_LOCK_EX);
1147 if (the_lnet.ln_network_tokens != NULL) {
1148 LIBCFS_FREE(the_lnet.ln_network_tokens,
1149 the_lnet.ln_network_tokens_nob);
1150 the_lnet.ln_network_tokens = NULL;
1155 lnet_startup_lndnis (void)
1159 struct lnet_tx_queue *tq;
1160 struct list_head nilist;
1165 char *nets = lnet_get_networks();
1167 INIT_LIST_HEAD(&nilist);
1172 rc = lnet_parse_networks(&nilist, nets);
1176 while (!list_empty(&nilist)) {
1177 ni = list_entry(nilist.next, lnet_ni_t, ni_list);
1178 lnd_type = LNET_NETTYP(LNET_NIDNET(ni->ni_nid));
1180 LASSERT(libcfs_isknown_lnd(lnd_type));
1182 if (lnd_type == CIBLND ||
1183 lnd_type == OPENIBLND ||
1184 lnd_type == IIBLND ||
1185 lnd_type == VIBLND) {
1186 CERROR("LND %s obsoleted\n",
1187 libcfs_lnd2str(lnd_type));
1191 LNET_MUTEX_LOCK(&the_lnet.ln_lnd_mutex);
1192 lnd = lnet_find_lnd_by_type(lnd_type);
1196 LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
1197 rc = request_module("%s",
1198 libcfs_lnd2modname(lnd_type));
1199 LNET_MUTEX_LOCK(&the_lnet.ln_lnd_mutex);
1201 lnd = lnet_find_lnd_by_type(lnd_type);
1203 LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
1204 CERROR("Can't load LND %s, module %s, rc=%d\n",
1205 libcfs_lnd2str(lnd_type),
1206 libcfs_lnd2modname(lnd_type), rc);
1207 #ifndef HAVE_MODULE_LOADING_SUPPORT
1208 LCONSOLE_ERROR_MSG(0x104, "Your kernel must be "
1209 "compiled with kernel module "
1210 "loading support.");
1217 LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
1218 CERROR("LND %s not supported\n",
1219 libcfs_lnd2str(lnd_type));
1224 lnet_net_lock(LNET_LOCK_EX);
1225 lnd->lnd_refcount++;
1226 lnet_net_unlock(LNET_LOCK_EX);
1230 rc = (lnd->lnd_startup)(ni);
1232 LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
1235 LCONSOLE_ERROR_MSG(0x105, "Error %d starting up LNI %s"
1237 rc, libcfs_lnd2str(lnd->lnd_type));
1238 lnet_net_lock(LNET_LOCK_EX);
1239 lnd->lnd_refcount--;
1240 lnet_net_unlock(LNET_LOCK_EX);
1244 LASSERT (ni->ni_peertimeout <= 0 || lnd->lnd_query != NULL);
1246 list_del(&ni->ni_list);
1248 lnet_net_lock(LNET_LOCK_EX);
1249 /* refcount for ln_nis */
1250 lnet_ni_addref_locked(ni, 0);
1251 list_add_tail(&ni->ni_list, &the_lnet.ln_nis);
1252 if (ni->ni_cpts != NULL) {
1253 list_add_tail(&ni->ni_cptlist,
1254 &the_lnet.ln_nis_cpt);
1255 lnet_ni_addref_locked(ni, 0);
1258 lnet_net_unlock(LNET_LOCK_EX);
1260 if (lnd->lnd_type == LOLND) {
1262 LASSERT (the_lnet.ln_loni == NULL);
1263 the_lnet.ln_loni = ni;
1268 if (lnd->lnd_wait != NULL) {
1269 if (the_lnet.ln_eq_waitni == NULL) {
1271 the_lnet.ln_eq_waitni = ni;
1274 # ifndef HAVE_LIBPTHREAD
1275 LCONSOLE_ERROR_MSG(0x106, "LND %s not supported in a "
1276 "single-threaded runtime\n",
1277 libcfs_lnd2str(lnd_type));
1282 if (ni->ni_peertxcredits == 0 ||
1283 ni->ni_maxtxcredits == 0) {
1284 LCONSOLE_ERROR_MSG(0x107, "LNI %s has no %scredits\n",
1285 libcfs_lnd2str(lnd->lnd_type),
1286 ni->ni_peertxcredits == 0 ?
1291 cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
1292 tq->tq_credits_min =
1293 tq->tq_credits_max =
1294 tq->tq_credits = lnet_ni_tq_credits(ni);
1297 CDEBUG(D_LNI, "Added LNI %s [%d/%d/%d/%d]\n",
1298 libcfs_nid2str(ni->ni_nid), ni->ni_peertxcredits,
1299 lnet_ni_tq_credits(ni) * LNET_CPT_NUMBER,
1300 ni->ni_peerrtrcredits, ni->ni_peertimeout);
1305 if (the_lnet.ln_eq_waitni != NULL && nicount > 1) {
1306 lnd_type = the_lnet.ln_eq_waitni->ni_lnd->lnd_type;
1307 LCONSOLE_ERROR_MSG(0x109, "LND %s can only run single-network"
1309 libcfs_lnd2str(lnd_type));
1316 lnet_shutdown_lndnis();
1318 while (!list_empty(&nilist)) {
1319 ni = list_entry(nilist.next, lnet_ni_t, ni_list);
1320 list_del(&ni->ni_list);
1328 * Initialize LNet library.
1330 * Only userspace program needs to call this function - it's automatically
1331 * called in the kernel at module loading time. Caller has to call LNetFini()
1332 * after a call to LNetInit(), if and only if the latter returned 0. It must
1333 * be called exactly once.
1335 * \return 0 on success, and -ve on failures.
1342 lnet_assert_wire_constants();
1343 LASSERT(!the_lnet.ln_init);
1345 memset(&the_lnet, 0, sizeof(the_lnet));
1347 /* refer to global cfs_cpt_table for now */
1348 the_lnet.ln_cpt_table = cfs_cpt_table;
1349 the_lnet.ln_cpt_number = cfs_cpt_number(cfs_cpt_table);
1351 LASSERT(the_lnet.ln_cpt_number > 0);
1352 if (the_lnet.ln_cpt_number > LNET_CPT_MAX) {
1353 /* we are under risk of consuming all lh_cookie */
1354 CERROR("Can't have %d CPTs for LNet (max allowed is %d), "
1355 "please change setting of CPT-table and retry\n",
1356 the_lnet.ln_cpt_number, LNET_CPT_MAX);
1360 while ((1 << the_lnet.ln_cpt_bits) < the_lnet.ln_cpt_number)
1361 the_lnet.ln_cpt_bits++;
1363 rc = lnet_create_locks();
1365 CERROR("Can't create LNet global locks: %d\n", rc);
1369 the_lnet.ln_refcount = 0;
1370 the_lnet.ln_init = 1;
1371 LNetInvalidateHandle(&the_lnet.ln_rc_eqh);
1372 INIT_LIST_HEAD(&the_lnet.ln_lnds);
1373 INIT_LIST_HEAD(&the_lnet.ln_rcd_zombie);
1374 INIT_LIST_HEAD(&the_lnet.ln_rcd_deathrow);
1377 /* The hash table size is the number of bits it takes to express the set
1378 * ln_num_routes, minus 1 (better to under estimate than over so we
1379 * don't waste memory). */
1380 if (rnet_htable_size <= 0)
1381 rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT;
1382 else if (rnet_htable_size > LNET_REMOTE_NETS_HASH_MAX)
1383 rnet_htable_size = LNET_REMOTE_NETS_HASH_MAX;
1384 the_lnet.ln_remote_nets_hbits = max_t(int, 1,
1385 order_base_2(rnet_htable_size) - 1);
1387 /* All LNDs apart from the LOLND are in separate modules. They
1388 * register themselves when their module loads, and unregister
1389 * themselves when their module is unloaded. */
1391 the_lnet.ln_remote_nets_hbits = 8;
1394 * NB the order here determines default 'networks=' order */
1395 # ifdef HAVE_LIBPTHREAD
1396 LNET_REGISTER_ULND(the_tcplnd);
1399 lnet_register_lnd(&the_lolnd);
1402 EXPORT_SYMBOL(LNetInit);
1405 * Finalize LNet library.
1407 * Only userspace program needs to call this function. It can be called
1410 * \pre LNetInit() called with success.
1411 * \pre All LNet users called LNetNIFini() for matching LNetNIInit() calls.
1416 LASSERT(the_lnet.ln_init);
1417 LASSERT(the_lnet.ln_refcount == 0);
1419 while (!list_empty(&the_lnet.ln_lnds))
1420 lnet_unregister_lnd(list_entry(the_lnet.ln_lnds.next,
1422 lnet_destroy_locks();
1424 the_lnet.ln_init = 0;
1426 EXPORT_SYMBOL(LNetFini);
1429 * Set LNet PID and start LNet interfaces, routing, and forwarding.
1431 * Userspace program should call this after a successful call to LNetInit().
1432 * Users must call this function at least once before any other functions.
1433 * For each successful call there must be a corresponding call to
1434 * LNetNIFini(). For subsequent calls to LNetNIInit(), \a requested_pid is
1437 * The PID used by LNet may be different from the one requested.
1440 * \param requested_pid PID requested by the caller.
1442 * \return >= 0 on success, and < 0 error code on failures.
1445 LNetNIInit(lnet_pid_t requested_pid)
1447 int im_a_router = 0;
1450 LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
1452 LASSERT (the_lnet.ln_init);
1453 CDEBUG(D_OTHER, "refs %d\n", the_lnet.ln_refcount);
1455 if (the_lnet.ln_refcount > 0) {
1456 rc = the_lnet.ln_refcount++;
1460 lnet_get_tunables();
1462 if (requested_pid == LNET_PID_ANY) {
1463 /* Don't instantiate LNET just for me */
1468 rc = lnet_prepare(requested_pid);
1472 rc = lnet_startup_lndnis();
1476 rc = lnet_parse_routes(lnet_get_routes(), &im_a_router);
1480 rc = lnet_check_routes();
1484 rc = lnet_rtrpools_alloc(im_a_router);
1488 rc = lnet_acceptor_start();
1492 the_lnet.ln_refcount = 1;
1493 /* Now I may use my own API functions... */
1495 /* NB router checker needs the_lnet.ln_ping_info in
1496 * lnet_router_checker -> lnet_update_ni_status_locked */
1497 rc = lnet_ping_target_init();
1501 rc = lnet_router_checker_start();
1509 lnet_ping_target_fini();
1511 the_lnet.ln_refcount = 0;
1512 lnet_acceptor_stop();
1514 lnet_destroy_routes();
1515 lnet_shutdown_lndnis();
1521 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
1524 EXPORT_SYMBOL(LNetNIInit);
1527 * Stop LNet interfaces, routing, and forwarding.
1529 * Users must call this function once for each successful call to LNetNIInit().
1530 * Once the LNetNIFini() operation has been started, the results of pending
1531 * API operations are undefined.
1533 * \return always 0 for current implementation.
1538 LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
1540 LASSERT (the_lnet.ln_init);
1541 LASSERT (the_lnet.ln_refcount > 0);
1543 if (the_lnet.ln_refcount != 1) {
1544 the_lnet.ln_refcount--;
1546 LASSERT (!the_lnet.ln_niinit_self);
1549 lnet_router_checker_stop();
1550 lnet_ping_target_fini();
1552 /* Teardown fns that use my own API functions BEFORE here */
1553 the_lnet.ln_refcount = 0;
1555 lnet_acceptor_stop();
1556 lnet_destroy_routes();
1557 lnet_shutdown_lndnis();
1561 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
1564 EXPORT_SYMBOL(LNetNIFini);
1567 * This is an ugly hack to export IOC_LIBCFS_DEBUG_PEER and
1568 * IOC_LIBCFS_PORTALS_COMPATIBILITY commands to users, by tweaking the LNet
1569 * internal ioctl handler.
1571 * IOC_LIBCFS_PORTALS_COMPATIBILITY is now deprecated, don't use it.
1573 * \param cmd IOC_LIBCFS_DEBUG_PEER to print debugging data about a peer.
1574 * The data will be printed to system console. Don't use it excessively.
1575 * \param arg A pointer to lnet_process_id_t, process ID of the peer.
1577 * \return Always return 0 when called by users directly (i.e., not via ioctl).
1580 LNetCtl(unsigned int cmd, void *arg)
1582 struct libcfs_ioctl_data *data = arg;
1583 lnet_process_id_t id = {0};
1587 LASSERT (the_lnet.ln_init);
1588 LASSERT (the_lnet.ln_refcount > 0);
1591 case IOC_LIBCFS_GET_NI:
1592 rc = LNetGetId(data->ioc_count, &id);
1593 data->ioc_nid = id.nid;
1596 case IOC_LIBCFS_FAIL_NID:
1597 return lnet_fail_nid(data->ioc_nid, data->ioc_count);
1599 case IOC_LIBCFS_ADD_ROUTE:
1600 rc = lnet_add_route(data->ioc_net, data->ioc_count,
1601 data->ioc_nid, data->ioc_priority);
1602 return (rc != 0) ? rc : lnet_check_routes();
1604 case IOC_LIBCFS_DEL_ROUTE:
1605 return lnet_del_route(data->ioc_net, data->ioc_nid);
1607 case IOC_LIBCFS_GET_ROUTE:
1608 return lnet_get_route(data->ioc_count,
1609 &data->ioc_net, &data->ioc_count,
1610 &data->ioc_nid, &data->ioc_flags,
1611 &data->ioc_priority);
1612 case IOC_LIBCFS_NOTIFY_ROUTER:
1613 return lnet_notify(NULL, data->ioc_nid, data->ioc_flags,
1614 cfs_time_current() -
1615 cfs_time_seconds(cfs_time_current_sec() -
1616 (time_t)data->ioc_u64[0]));
1618 case IOC_LIBCFS_PORTALS_COMPATIBILITY:
1619 /* This can be removed once lustre stops calling it */
1622 case IOC_LIBCFS_LNET_DIST:
1623 rc = LNetDist(data->ioc_nid, &data->ioc_nid, &data->ioc_u32[1]);
1624 if (rc < 0 && rc != -EHOSTUNREACH)
1627 data->ioc_u32[0] = rc;
1630 case IOC_LIBCFS_TESTPROTOCOMPAT:
1631 lnet_net_lock(LNET_LOCK_EX);
1632 the_lnet.ln_testprotocompat = data->ioc_flags;
1633 lnet_net_unlock(LNET_LOCK_EX);
1636 case IOC_LIBCFS_PING:
1637 id.nid = data->ioc_nid;
1638 id.pid = data->ioc_u32[0];
1639 rc = lnet_ping(id, data->ioc_u32[1], /* timeout */
1640 (lnet_process_id_t *)data->ioc_pbuf1,
1641 data->ioc_plen1/sizeof(lnet_process_id_t));
1644 data->ioc_count = rc;
1647 case IOC_LIBCFS_DEBUG_PEER: {
1648 /* CAVEAT EMPTOR: this one designed for calling directly; not
1650 id = *((lnet_process_id_t *) arg);
1652 lnet_debug_peer(id.nid);
1654 ni = lnet_net2ni(LNET_NIDNET(id.nid));
1656 CDEBUG(D_WARNING, "No NI for %s\n", libcfs_id2str(id));
1658 if (ni->ni_lnd->lnd_ctl == NULL) {
1659 CDEBUG(D_WARNING, "No ctl for %s\n",
1662 (void)ni->ni_lnd->lnd_ctl(ni, cmd, arg);
1671 ni = lnet_net2ni(data->ioc_net);
1675 if (ni->ni_lnd->lnd_ctl == NULL)
1678 rc = ni->ni_lnd->lnd_ctl(ni, cmd, arg);
1685 EXPORT_SYMBOL(LNetCtl);
1688 * Retrieve the lnet_process_id_t ID of LNet interface at \a index. Note that
1689 * all interfaces share a same PID, as requested by LNetNIInit().
1691 * \param index Index of the interface to look up.
1692 * \param id On successful return, this location will hold the
1693 * lnet_process_id_t ID of the interface.
1695 * \retval 0 If an interface exists at \a index.
1696 * \retval -ENOENT If no interface has been found.
1699 LNetGetId(unsigned int index, lnet_process_id_t *id)
1702 struct list_head *tmp;
1706 LASSERT(the_lnet.ln_init);
1707 LASSERT(the_lnet.ln_refcount > 0);
1709 cpt = lnet_net_lock_current();
1711 list_for_each(tmp, &the_lnet.ln_nis) {
1715 ni = list_entry(tmp, lnet_ni_t, ni_list);
1717 id->nid = ni->ni_nid;
1718 id->pid = the_lnet.ln_pid;
1723 lnet_net_unlock(cpt);
1726 EXPORT_SYMBOL(LNetGetId);
1729 * Print a string representation of handle \a h into buffer \a str of
1733 LNetSnprintHandle(char *str, int len, lnet_handle_any_t h)
1735 snprintf(str, len, LPX64, h.cookie);
1737 EXPORT_SYMBOL(LNetSnprintHandle);
1740 lnet_create_ping_info(void)
1745 unsigned int infosz;
1747 lnet_process_id_t id;
1748 lnet_ping_info_t *pinfo;
1750 for (n = 0; ; n++) {
1751 rc = LNetGetId(n, &id);
1758 infosz = offsetof(lnet_ping_info_t, pi_ni[n]);
1759 LIBCFS_ALLOC(pinfo, infosz);
1760 if (pinfo == NULL) {
1761 CERROR("Can't allocate ping info[%d]\n", n);
1766 pinfo->pi_pid = the_lnet.ln_pid;
1767 pinfo->pi_magic = LNET_PROTO_PING_MAGIC;
1768 pinfo->pi_features = LNET_PING_FEAT_NI_STATUS;
1770 for (i = 0; i < n; i++) {
1771 lnet_ni_status_t *ns = &pinfo->pi_ni[i];
1773 rc = LNetGetId(i, &id);
1776 ns->ns_nid = id.nid;
1777 ns->ns_status = LNET_NI_STATUS_UP;
1781 ni = lnet_nid2ni_locked(id.nid, 0);
1782 LASSERT(ni != NULL);
1785 LASSERT(ni->ni_status == NULL);
1789 lnet_ni_decref_locked(ni, 0);
1793 the_lnet.ln_ping_info = pinfo;
1798 lnet_destroy_ping_info(void)
1804 list_for_each_entry(ni, &the_lnet.ln_nis, ni_list) {
1806 ni->ni_status = NULL;
1812 LIBCFS_FREE(the_lnet.ln_ping_info,
1813 offsetof(lnet_ping_info_t,
1814 pi_ni[the_lnet.ln_ping_info->pi_nnis]));
1815 the_lnet.ln_ping_info = NULL;
1820 lnet_ping_target_init(void)
1823 lnet_handle_me_t meh;
1824 lnet_process_id_t id;
1829 rc = lnet_create_ping_info();
1833 /* We can have a tiny EQ since we only need to see the unlink event on
1834 * teardown, which by definition is the last one! */
1835 rc = LNetEQAlloc(2, LNET_EQ_HANDLER_NONE, &the_lnet.ln_ping_target_eq);
1837 CERROR("Can't allocate ping EQ: %d\n", rc);
1841 memset(&id, 0, sizeof(lnet_process_id_t));
1842 id.nid = LNET_NID_ANY;
1843 id.pid = LNET_PID_ANY;
1845 rc = LNetMEAttach(LNET_RESERVED_PORTAL, id,
1846 LNET_PROTO_PING_MATCHBITS, 0,
1847 LNET_UNLINK, LNET_INS_AFTER,
1850 CERROR("Can't create ping ME: %d\n", rc);
1854 /* initialize md content */
1855 infosz = offsetof(lnet_ping_info_t,
1856 pi_ni[the_lnet.ln_ping_info->pi_nnis]);
1857 md.start = the_lnet.ln_ping_info;
1859 md.threshold = LNET_MD_THRESH_INF;
1861 md.options = LNET_MD_OP_GET | LNET_MD_TRUNCATE |
1862 LNET_MD_MANAGE_REMOTE;
1864 md.eq_handle = the_lnet.ln_ping_target_eq;
1866 rc = LNetMDAttach(meh, md,
1868 &the_lnet.ln_ping_target_md);
1870 CERROR("Can't attach ping MD: %d\n", rc);
1877 rc2 = LNetMEUnlink(meh);
1880 rc2 = LNetEQFree(the_lnet.ln_ping_target_eq);
1883 lnet_destroy_ping_info();
1888 lnet_ping_target_fini(void)
1893 int timeout_ms = 1000;
1894 sigset_t blocked = cfs_block_allsigs();
1896 LNetMDUnlink(the_lnet.ln_ping_target_md);
1897 /* NB md could be busy; this just starts the unlink */
1900 rc = LNetEQPoll(&the_lnet.ln_ping_target_eq, 1,
1901 timeout_ms, &event, &which);
1903 /* I expect overflow... */
1904 LASSERT (rc >= 0 || rc == -EOVERFLOW);
1907 /* timed out: provide a diagnostic */
1908 CWARN("Still waiting for ping MD to unlink\n");
1913 /* Got a valid event */
1918 rc = LNetEQFree(the_lnet.ln_ping_target_eq);
1920 lnet_destroy_ping_info();
1921 cfs_restore_sigs(blocked);
1925 lnet_ping (lnet_process_id_t id, int timeout_ms, lnet_process_id_t *ids, int n_ids)
1927 lnet_handle_eq_t eqh;
1928 lnet_handle_md_t mdh;
1934 const int a_long_time = 60000; /* mS */
1935 int infosz = offsetof(lnet_ping_info_t, pi_ni[n_ids]);
1936 lnet_ping_info_t *info;
1937 lnet_process_id_t tmpid;
1945 id.nid == LNET_NID_ANY ||
1946 timeout_ms > 500000 || /* arbitrary limit! */
1947 n_ids > 20) /* arbitrary limit! */
1950 if (id.pid == LNET_PID_ANY)
1951 id.pid = LUSTRE_SRV_LNET_PID;
1953 LIBCFS_ALLOC(info, infosz);
1957 /* NB 2 events max (including any unlink event) */
1958 rc = LNetEQAlloc(2, LNET_EQ_HANDLER_NONE, &eqh);
1960 CERROR("Can't allocate EQ: %d\n", rc);
1964 /* initialize md content */
1967 md.threshold = 2; /*GET/REPLY*/
1969 md.options = LNET_MD_TRUNCATE;
1973 rc = LNetMDBind(md, LNET_UNLINK, &mdh);
1975 CERROR("Can't bind MD: %d\n", rc);
1979 rc = LNetGet(LNET_NID_ANY, mdh, id,
1980 LNET_RESERVED_PORTAL,
1981 LNET_PROTO_PING_MATCHBITS, 0);
1984 /* Don't CERROR; this could be deliberate! */
1986 rc2 = LNetMDUnlink(mdh);
1989 /* NB must wait for the UNLINK event below... */
1991 timeout_ms = a_long_time;
1995 /* MUST block for unlink to complete */
1997 blocked = cfs_block_allsigs();
1999 rc2 = LNetEQPoll(&eqh, 1, timeout_ms, &event, &which);
2002 cfs_restore_sigs(blocked);
2004 CDEBUG(D_NET, "poll %d(%d %d)%s\n", rc2,
2005 (rc2 <= 0) ? -1 : event.type,
2006 (rc2 <= 0) ? -1 : event.status,
2007 (rc2 > 0 && event.unlinked) ? " unlinked" : "");
2009 LASSERT (rc2 != -EOVERFLOW); /* can't miss anything */
2011 if (rc2 <= 0 || event.status != 0) {
2012 /* timeout or error */
2013 if (!replied && rc == 0)
2014 rc = (rc2 < 0) ? rc2 :
2015 (rc2 == 0) ? -ETIMEDOUT :
2019 /* Ensure completion in finite time... */
2021 /* No assertion (racing with network) */
2023 timeout_ms = a_long_time;
2024 } else if (rc2 == 0) {
2025 /* timed out waiting for unlink */
2026 CWARN("ping %s: late network completion\n",
2029 } else if (event.type == LNET_EVENT_REPLY) {
2034 } while (rc2 <= 0 || !event.unlinked);
2038 CWARN("%s: Unexpected rc >= 0 but no reply!\n",
2045 LASSERT (nob >= 0 && nob <= infosz);
2047 rc = -EPROTO; /* if I can't parse... */
2050 /* can't check magic/version */
2051 CERROR("%s: ping info too short %d\n",
2052 libcfs_id2str(id), nob);
2056 if (info->pi_magic == __swab32(LNET_PROTO_PING_MAGIC)) {
2057 lnet_swap_pinginfo(info);
2058 } else if (info->pi_magic != LNET_PROTO_PING_MAGIC) {
2059 CERROR("%s: Unexpected magic %08x\n",
2060 libcfs_id2str(id), info->pi_magic);
2064 if ((info->pi_features & LNET_PING_FEAT_NI_STATUS) == 0) {
2065 CERROR("%s: ping w/o NI status: 0x%x\n",
2066 libcfs_id2str(id), info->pi_features);
2070 if (nob < offsetof(lnet_ping_info_t, pi_ni[0])) {
2071 CERROR("%s: Short reply %d(%d min)\n", libcfs_id2str(id),
2072 nob, (int)offsetof(lnet_ping_info_t, pi_ni[0]));
2076 if (info->pi_nnis < n_ids)
2077 n_ids = info->pi_nnis;
2079 if (nob < offsetof(lnet_ping_info_t, pi_ni[n_ids])) {
2080 CERROR("%s: Short reply %d(%d expected)\n", libcfs_id2str(id),
2081 nob, (int)offsetof(lnet_ping_info_t, pi_ni[n_ids]));
2085 rc = -EFAULT; /* If I SEGV... */
2087 for (i = 0; i < n_ids; i++) {
2088 tmpid.pid = info->pi_pid;
2089 tmpid.nid = info->pi_ni[i].ns_nid;
2090 if (copy_to_user(&ids[i], &tmpid, sizeof(tmpid)))
2096 rc2 = LNetEQFree(eqh);
2098 CERROR("rc2 %d\n", rc2);
2102 LIBCFS_FREE(info, infosz);