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, 2015, 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 <linux/log2.h>
39 #include <lnet/lib-lnet.h>
41 #define D_LNI D_CONSOLE
43 lnet_t the_lnet; /* THE state of the network */
44 EXPORT_SYMBOL(the_lnet);
46 static char *ip2nets = "";
47 module_param(ip2nets, charp, 0444);
48 MODULE_PARM_DESC(ip2nets, "LNET network <- IP table");
50 static char *networks = "";
51 module_param(networks, charp, 0444);
52 MODULE_PARM_DESC(networks, "local networks");
54 static char *routes = "";
55 module_param(routes, charp, 0444);
56 MODULE_PARM_DESC(routes, "routes to non-local networks");
58 static int rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT;
59 module_param(rnet_htable_size, int, 0444);
60 MODULE_PARM_DESC(rnet_htable_size, "size of remote network hash table");
62 static int lnet_ping(lnet_process_id_t id, int timeout_ms,
63 lnet_process_id_t __user *ids, int n_ids);
72 lnet_get_networks(void)
77 if (*networks != 0 && *ip2nets != 0) {
78 LCONSOLE_ERROR_MSG(0x101, "Please specify EITHER 'networks' or "
79 "'ip2nets' but not both at once\n");
84 rc = lnet_parse_ip2nets(&nets, ip2nets);
85 return (rc == 0) ? nets : NULL;
97 spin_lock_init(&the_lnet.ln_eq_wait_lock);
98 init_waitqueue_head(&the_lnet.ln_eq_waitq);
99 init_waitqueue_head(&the_lnet.ln_rc_waitq);
100 mutex_init(&the_lnet.ln_lnd_mutex);
101 mutex_init(&the_lnet.ln_api_mutex);
105 lnet_fini_locks(void)
109 struct kmem_cache *lnet_mes_cachep; /* MEs kmem_cache */
110 struct kmem_cache *lnet_small_mds_cachep; /* <= LNET_SMALL_MD_SIZE bytes
114 lnet_descriptor_setup(void)
116 /* create specific kmem_cache for MEs and small MDs (i.e., originally
117 * allocated in <size-xxx> kmem_cache).
119 lnet_mes_cachep = kmem_cache_create("lnet_MEs", sizeof(lnet_me_t),
121 if (!lnet_mes_cachep)
124 lnet_small_mds_cachep = kmem_cache_create("lnet_small_MDs",
125 LNET_SMALL_MD_SIZE, 0, 0,
127 if (!lnet_small_mds_cachep)
134 lnet_descriptor_cleanup(void)
137 if (lnet_small_mds_cachep) {
138 kmem_cache_destroy(lnet_small_mds_cachep);
139 lnet_small_mds_cachep = NULL;
142 if (lnet_mes_cachep) {
143 kmem_cache_destroy(lnet_mes_cachep);
144 lnet_mes_cachep = NULL;
149 lnet_create_remote_nets_table(void)
152 struct list_head *hash;
154 LASSERT(the_lnet.ln_remote_nets_hash == NULL);
155 LASSERT(the_lnet.ln_remote_nets_hbits > 0);
156 LIBCFS_ALLOC(hash, LNET_REMOTE_NETS_HASH_SIZE * sizeof(*hash));
158 CERROR("Failed to create remote nets hash table\n");
162 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++)
163 INIT_LIST_HEAD(&hash[i]);
164 the_lnet.ln_remote_nets_hash = hash;
169 lnet_destroy_remote_nets_table(void)
173 if (the_lnet.ln_remote_nets_hash == NULL)
176 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++)
177 LASSERT(list_empty(&the_lnet.ln_remote_nets_hash[i]));
179 LIBCFS_FREE(the_lnet.ln_remote_nets_hash,
180 LNET_REMOTE_NETS_HASH_SIZE *
181 sizeof(the_lnet.ln_remote_nets_hash[0]));
182 the_lnet.ln_remote_nets_hash = NULL;
186 lnet_destroy_locks(void)
188 if (the_lnet.ln_res_lock != NULL) {
189 cfs_percpt_lock_free(the_lnet.ln_res_lock);
190 the_lnet.ln_res_lock = NULL;
193 if (the_lnet.ln_net_lock != NULL) {
194 cfs_percpt_lock_free(the_lnet.ln_net_lock);
195 the_lnet.ln_net_lock = NULL;
202 lnet_create_locks(void)
206 the_lnet.ln_res_lock = cfs_percpt_lock_alloc(lnet_cpt_table());
207 if (the_lnet.ln_res_lock == NULL)
210 the_lnet.ln_net_lock = cfs_percpt_lock_alloc(lnet_cpt_table());
211 if (the_lnet.ln_net_lock == NULL)
217 lnet_destroy_locks();
221 static void lnet_assert_wire_constants(void)
223 /* Wire protocol assertions generated by 'wirecheck'
224 * running on Linux robert.bartonsoftware.com 2.6.8-1.521
225 * #1 Mon Aug 16 09:01:18 EDT 2004 i686 athlon i386 GNU/Linux
226 * with gcc version 3.3.3 20040412 (Red Hat Linux 3.3.3-7) */
229 CLASSERT (LNET_PROTO_TCP_MAGIC == 0xeebc0ded);
230 CLASSERT (LNET_PROTO_TCP_VERSION_MAJOR == 1);
231 CLASSERT (LNET_PROTO_TCP_VERSION_MINOR == 0);
232 CLASSERT (LNET_MSG_ACK == 0);
233 CLASSERT (LNET_MSG_PUT == 1);
234 CLASSERT (LNET_MSG_GET == 2);
235 CLASSERT (LNET_MSG_REPLY == 3);
236 CLASSERT (LNET_MSG_HELLO == 4);
238 /* Checks for struct ptl_handle_wire_t */
239 CLASSERT ((int)sizeof(lnet_handle_wire_t) == 16);
240 CLASSERT ((int)offsetof(lnet_handle_wire_t, wh_interface_cookie) == 0);
241 CLASSERT ((int)sizeof(((lnet_handle_wire_t *)0)->wh_interface_cookie) == 8);
242 CLASSERT ((int)offsetof(lnet_handle_wire_t, wh_object_cookie) == 8);
243 CLASSERT ((int)sizeof(((lnet_handle_wire_t *)0)->wh_object_cookie) == 8);
245 /* Checks for struct lnet_magicversion_t */
246 CLASSERT ((int)sizeof(lnet_magicversion_t) == 8);
247 CLASSERT ((int)offsetof(lnet_magicversion_t, magic) == 0);
248 CLASSERT ((int)sizeof(((lnet_magicversion_t *)0)->magic) == 4);
249 CLASSERT ((int)offsetof(lnet_magicversion_t, version_major) == 4);
250 CLASSERT ((int)sizeof(((lnet_magicversion_t *)0)->version_major) == 2);
251 CLASSERT ((int)offsetof(lnet_magicversion_t, version_minor) == 6);
252 CLASSERT ((int)sizeof(((lnet_magicversion_t *)0)->version_minor) == 2);
254 /* Checks for struct lnet_hdr_t */
255 CLASSERT ((int)sizeof(lnet_hdr_t) == 72);
256 CLASSERT ((int)offsetof(lnet_hdr_t, dest_nid) == 0);
257 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->dest_nid) == 8);
258 CLASSERT ((int)offsetof(lnet_hdr_t, src_nid) == 8);
259 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->src_nid) == 8);
260 CLASSERT ((int)offsetof(lnet_hdr_t, dest_pid) == 16);
261 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->dest_pid) == 4);
262 CLASSERT ((int)offsetof(lnet_hdr_t, src_pid) == 20);
263 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->src_pid) == 4);
264 CLASSERT ((int)offsetof(lnet_hdr_t, type) == 24);
265 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->type) == 4);
266 CLASSERT ((int)offsetof(lnet_hdr_t, payload_length) == 28);
267 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->payload_length) == 4);
268 CLASSERT ((int)offsetof(lnet_hdr_t, msg) == 32);
269 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg) == 40);
272 CLASSERT ((int)offsetof(lnet_hdr_t, msg.ack.dst_wmd) == 32);
273 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.ack.dst_wmd) == 16);
274 CLASSERT ((int)offsetof(lnet_hdr_t, msg.ack.match_bits) == 48);
275 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.ack.match_bits) == 8);
276 CLASSERT ((int)offsetof(lnet_hdr_t, msg.ack.mlength) == 56);
277 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.ack.mlength) == 4);
280 CLASSERT ((int)offsetof(lnet_hdr_t, msg.put.ack_wmd) == 32);
281 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.put.ack_wmd) == 16);
282 CLASSERT ((int)offsetof(lnet_hdr_t, msg.put.match_bits) == 48);
283 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.put.match_bits) == 8);
284 CLASSERT ((int)offsetof(lnet_hdr_t, msg.put.hdr_data) == 56);
285 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.put.hdr_data) == 8);
286 CLASSERT ((int)offsetof(lnet_hdr_t, msg.put.ptl_index) == 64);
287 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.put.ptl_index) == 4);
288 CLASSERT ((int)offsetof(lnet_hdr_t, msg.put.offset) == 68);
289 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.put.offset) == 4);
292 CLASSERT ((int)offsetof(lnet_hdr_t, msg.get.return_wmd) == 32);
293 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.get.return_wmd) == 16);
294 CLASSERT ((int)offsetof(lnet_hdr_t, msg.get.match_bits) == 48);
295 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.get.match_bits) == 8);
296 CLASSERT ((int)offsetof(lnet_hdr_t, msg.get.ptl_index) == 56);
297 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.get.ptl_index) == 4);
298 CLASSERT ((int)offsetof(lnet_hdr_t, msg.get.src_offset) == 60);
299 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.get.src_offset) == 4);
300 CLASSERT ((int)offsetof(lnet_hdr_t, msg.get.sink_length) == 64);
301 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.get.sink_length) == 4);
304 CLASSERT ((int)offsetof(lnet_hdr_t, msg.reply.dst_wmd) == 32);
305 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.reply.dst_wmd) == 16);
308 CLASSERT ((int)offsetof(lnet_hdr_t, msg.hello.incarnation) == 32);
309 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.hello.incarnation) == 8);
310 CLASSERT ((int)offsetof(lnet_hdr_t, msg.hello.type) == 40);
311 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.hello.type) == 4);
314 static lnd_t *lnet_find_lnd_by_type(__u32 type)
317 struct list_head *tmp;
319 /* holding lnd mutex */
320 list_for_each(tmp, &the_lnet.ln_lnds) {
321 lnd = list_entry(tmp, lnd_t, lnd_list);
323 if (lnd->lnd_type == type)
330 lnet_register_lnd (lnd_t *lnd)
332 mutex_lock(&the_lnet.ln_lnd_mutex);
334 LASSERT(libcfs_isknown_lnd(lnd->lnd_type));
335 LASSERT(lnet_find_lnd_by_type(lnd->lnd_type) == NULL);
337 list_add_tail(&lnd->lnd_list, &the_lnet.ln_lnds);
338 lnd->lnd_refcount = 0;
340 CDEBUG(D_NET, "%s LND registered\n", libcfs_lnd2str(lnd->lnd_type));
342 mutex_unlock(&the_lnet.ln_lnd_mutex);
344 EXPORT_SYMBOL(lnet_register_lnd);
347 lnet_unregister_lnd (lnd_t *lnd)
349 mutex_lock(&the_lnet.ln_lnd_mutex);
351 LASSERT(lnet_find_lnd_by_type(lnd->lnd_type) == lnd);
352 LASSERT(lnd->lnd_refcount == 0);
354 list_del(&lnd->lnd_list);
355 CDEBUG(D_NET, "%s LND unregistered\n", libcfs_lnd2str(lnd->lnd_type));
357 mutex_unlock(&the_lnet.ln_lnd_mutex);
359 EXPORT_SYMBOL(lnet_unregister_lnd);
362 lnet_counters_get(lnet_counters_t *counters)
364 lnet_counters_t *ctr;
367 memset(counters, 0, sizeof(*counters));
369 lnet_net_lock(LNET_LOCK_EX);
371 cfs_percpt_for_each(ctr, i, the_lnet.ln_counters) {
372 counters->msgs_max += ctr->msgs_max;
373 counters->msgs_alloc += ctr->msgs_alloc;
374 counters->errors += ctr->errors;
375 counters->send_count += ctr->send_count;
376 counters->recv_count += ctr->recv_count;
377 counters->route_count += ctr->route_count;
378 counters->drop_count += ctr->drop_count;
379 counters->send_length += ctr->send_length;
380 counters->recv_length += ctr->recv_length;
381 counters->route_length += ctr->route_length;
382 counters->drop_length += ctr->drop_length;
385 lnet_net_unlock(LNET_LOCK_EX);
387 EXPORT_SYMBOL(lnet_counters_get);
390 lnet_counters_reset(void)
392 lnet_counters_t *counters;
395 lnet_net_lock(LNET_LOCK_EX);
397 cfs_percpt_for_each(counters, i, the_lnet.ln_counters)
398 memset(counters, 0, sizeof(lnet_counters_t));
400 lnet_net_unlock(LNET_LOCK_EX);
403 static __u64 lnet_create_interface_cookie(void)
405 /* NB the interface cookie in wire handles guards against delayed
406 * replies and ACKs appearing valid after reboot. Initialisation time,
407 * even if it's only implemented to millisecond resolution is probably
408 * easily good enough. */
411 do_gettimeofday(&tv);
414 cookie += tv.tv_usec;
419 lnet_res_type2str(int type)
424 case LNET_COOKIE_TYPE_MD:
426 case LNET_COOKIE_TYPE_ME:
428 case LNET_COOKIE_TYPE_EQ:
434 lnet_res_container_cleanup(struct lnet_res_container *rec)
438 if (rec->rec_type == 0) /* not set yet, it's uninitialized */
441 while (!list_empty(&rec->rec_active)) {
442 struct list_head *e = rec->rec_active.next;
445 if (rec->rec_type == LNET_COOKIE_TYPE_EQ) {
446 lnet_eq_free(list_entry(e, lnet_eq_t, eq_list));
448 } else if (rec->rec_type == LNET_COOKIE_TYPE_MD) {
449 lnet_md_free(list_entry(e, lnet_libmd_t, md_list));
451 } else { /* NB: Active MEs should be attached on portals */
458 /* Found alive MD/ME/EQ, user really should unlink/free
459 * all of them before finalize LNet, but if someone didn't,
460 * we have to recycle garbage for him */
461 CERROR("%d active elements on exit of %s container\n",
462 count, lnet_res_type2str(rec->rec_type));
465 if (rec->rec_lh_hash != NULL) {
466 LIBCFS_FREE(rec->rec_lh_hash,
467 LNET_LH_HASH_SIZE * sizeof(rec->rec_lh_hash[0]));
468 rec->rec_lh_hash = NULL;
471 rec->rec_type = 0; /* mark it as finalized */
475 lnet_res_container_setup(struct lnet_res_container *rec, int cpt, int type)
480 LASSERT(rec->rec_type == 0);
482 rec->rec_type = type;
483 INIT_LIST_HEAD(&rec->rec_active);
485 rec->rec_lh_cookie = (cpt << LNET_COOKIE_TYPE_BITS) | type;
487 /* Arbitrary choice of hash table size */
488 LIBCFS_CPT_ALLOC(rec->rec_lh_hash, lnet_cpt_table(), cpt,
489 LNET_LH_HASH_SIZE * sizeof(rec->rec_lh_hash[0]));
490 if (rec->rec_lh_hash == NULL) {
495 for (i = 0; i < LNET_LH_HASH_SIZE; i++)
496 INIT_LIST_HEAD(&rec->rec_lh_hash[i]);
501 CERROR("Failed to setup %s resource container\n",
502 lnet_res_type2str(type));
503 lnet_res_container_cleanup(rec);
508 lnet_res_containers_destroy(struct lnet_res_container **recs)
510 struct lnet_res_container *rec;
513 cfs_percpt_for_each(rec, i, recs)
514 lnet_res_container_cleanup(rec);
516 cfs_percpt_free(recs);
519 static struct lnet_res_container **
520 lnet_res_containers_create(int type)
522 struct lnet_res_container **recs;
523 struct lnet_res_container *rec;
527 recs = cfs_percpt_alloc(lnet_cpt_table(), sizeof(*rec));
529 CERROR("Failed to allocate %s resource containers\n",
530 lnet_res_type2str(type));
534 cfs_percpt_for_each(rec, i, recs) {
535 rc = lnet_res_container_setup(rec, i, type);
537 lnet_res_containers_destroy(recs);
546 lnet_res_lh_lookup(struct lnet_res_container *rec, __u64 cookie)
548 /* ALWAYS called with lnet_res_lock held */
549 struct list_head *head;
550 lnet_libhandle_t *lh;
553 if ((cookie & LNET_COOKIE_MASK) != rec->rec_type)
556 hash = cookie >> (LNET_COOKIE_TYPE_BITS + LNET_CPT_BITS);
557 head = &rec->rec_lh_hash[hash & LNET_LH_HASH_MASK];
559 list_for_each_entry(lh, head, lh_hash_chain) {
560 if (lh->lh_cookie == cookie)
568 lnet_res_lh_initialize(struct lnet_res_container *rec, lnet_libhandle_t *lh)
570 /* ALWAYS called with lnet_res_lock held */
571 unsigned int ibits = LNET_COOKIE_TYPE_BITS + LNET_CPT_BITS;
574 lh->lh_cookie = rec->rec_lh_cookie;
575 rec->rec_lh_cookie += 1 << ibits;
577 hash = (lh->lh_cookie >> ibits) & LNET_LH_HASH_MASK;
579 list_add(&lh->lh_hash_chain, &rec->rec_lh_hash[hash]);
582 static int lnet_unprepare(void);
585 lnet_prepare(lnet_pid_t requested_pid)
587 /* Prepare to bring up the network */
588 struct lnet_res_container **recs;
591 if (requested_pid == LNET_PID_ANY) {
592 /* Don't instantiate LNET just for me */
596 LASSERT(the_lnet.ln_refcount == 0);
598 the_lnet.ln_routing = 0;
600 LASSERT((requested_pid & LNET_PID_USERFLAG) == 0);
601 the_lnet.ln_pid = requested_pid;
603 INIT_LIST_HEAD(&the_lnet.ln_test_peers);
604 INIT_LIST_HEAD(&the_lnet.ln_nis);
605 INIT_LIST_HEAD(&the_lnet.ln_nis_cpt);
606 INIT_LIST_HEAD(&the_lnet.ln_nis_zombie);
607 INIT_LIST_HEAD(&the_lnet.ln_routers);
608 INIT_LIST_HEAD(&the_lnet.ln_drop_rules);
609 INIT_LIST_HEAD(&the_lnet.ln_delay_rules);
611 rc = lnet_descriptor_setup();
615 rc = lnet_create_remote_nets_table();
619 the_lnet.ln_interface_cookie = lnet_create_interface_cookie();
621 the_lnet.ln_counters = cfs_percpt_alloc(lnet_cpt_table(),
622 sizeof(lnet_counters_t));
623 if (the_lnet.ln_counters == NULL) {
624 CERROR("Failed to allocate counters for LNet\n");
629 rc = lnet_peer_tables_create();
633 rc = lnet_msg_containers_create();
637 rc = lnet_res_container_setup(&the_lnet.ln_eq_container, 0,
638 LNET_COOKIE_TYPE_EQ);
642 recs = lnet_res_containers_create(LNET_COOKIE_TYPE_ME);
648 the_lnet.ln_me_containers = recs;
650 recs = lnet_res_containers_create(LNET_COOKIE_TYPE_MD);
656 the_lnet.ln_md_containers = recs;
658 rc = lnet_portals_create();
660 CERROR("Failed to create portals for LNet: %d\n", rc);
672 lnet_unprepare (void)
674 /* NB no LNET_LOCK since this is the last reference. All LND instances
675 * have shut down already, so it is safe to unlink and free all
676 * descriptors, even those that appear committed to a network op (eg MD
677 * with non-zero pending count) */
679 lnet_fail_nid(LNET_NID_ANY, 0);
681 LASSERT(the_lnet.ln_refcount == 0);
682 LASSERT(list_empty(&the_lnet.ln_test_peers));
683 LASSERT(list_empty(&the_lnet.ln_nis));
684 LASSERT(list_empty(&the_lnet.ln_nis_cpt));
685 LASSERT(list_empty(&the_lnet.ln_nis_zombie));
687 lnet_portals_destroy();
689 if (the_lnet.ln_md_containers != NULL) {
690 lnet_res_containers_destroy(the_lnet.ln_md_containers);
691 the_lnet.ln_md_containers = NULL;
694 if (the_lnet.ln_me_containers != NULL) {
695 lnet_res_containers_destroy(the_lnet.ln_me_containers);
696 the_lnet.ln_me_containers = NULL;
699 lnet_res_container_cleanup(&the_lnet.ln_eq_container);
701 lnet_msg_containers_destroy();
702 lnet_peer_tables_destroy();
703 lnet_rtrpools_free(0);
705 if (the_lnet.ln_counters != NULL) {
706 cfs_percpt_free(the_lnet.ln_counters);
707 the_lnet.ln_counters = NULL;
709 lnet_destroy_remote_nets_table();
710 lnet_descriptor_cleanup();
716 lnet_net2ni_locked(__u32 net, int cpt)
718 struct list_head *tmp;
721 LASSERT(cpt != LNET_LOCK_EX);
723 list_for_each(tmp, &the_lnet.ln_nis) {
724 ni = list_entry(tmp, lnet_ni_t, ni_list);
726 if (LNET_NIDNET(ni->ni_nid) == net) {
727 lnet_ni_addref_locked(ni, cpt);
736 lnet_net2ni(__u32 net)
741 ni = lnet_net2ni_locked(net, 0);
746 EXPORT_SYMBOL(lnet_net2ni);
749 lnet_nid_cpt_hash(lnet_nid_t nid, unsigned int number)
754 LASSERT(number >= 1 && number <= LNET_CPT_NUMBER);
759 val = hash_long(key, LNET_CPT_BITS);
760 /* NB: LNET_CP_NUMBER doesn't have to be PO2 */
764 return (unsigned int)(key + val + (val >> 1)) % number;
768 lnet_cpt_of_nid_locked(lnet_nid_t nid)
772 /* must called with hold of lnet_net_lock */
773 if (LNET_CPT_NUMBER == 1)
774 return 0; /* the only one */
776 /* take lnet_net_lock(any) would be OK */
777 if (!list_empty(&the_lnet.ln_nis_cpt)) {
778 list_for_each_entry(ni, &the_lnet.ln_nis_cpt, ni_cptlist) {
779 if (LNET_NIDNET(ni->ni_nid) != LNET_NIDNET(nid))
782 LASSERT(ni->ni_cpts != NULL);
783 return ni->ni_cpts[lnet_nid_cpt_hash
784 (nid, ni->ni_ncpts)];
788 return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
792 lnet_cpt_of_nid(lnet_nid_t nid)
797 if (LNET_CPT_NUMBER == 1)
798 return 0; /* the only one */
800 if (list_empty(&the_lnet.ln_nis_cpt))
801 return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
803 cpt = lnet_net_lock_current();
804 cpt2 = lnet_cpt_of_nid_locked(nid);
805 lnet_net_unlock(cpt);
809 EXPORT_SYMBOL(lnet_cpt_of_nid);
812 lnet_islocalnet(__u32 net)
817 cpt = lnet_net_lock_current();
819 ni = lnet_net2ni_locked(net, cpt);
821 lnet_ni_decref_locked(ni, cpt);
823 lnet_net_unlock(cpt);
829 lnet_nid2ni_locked(lnet_nid_t nid, int cpt)
832 struct list_head *tmp;
834 LASSERT(cpt != LNET_LOCK_EX);
836 list_for_each(tmp, &the_lnet.ln_nis) {
837 ni = list_entry(tmp, lnet_ni_t, ni_list);
839 if (ni->ni_nid == nid) {
840 lnet_ni_addref_locked(ni, cpt);
849 lnet_islocalnid(lnet_nid_t nid)
854 cpt = lnet_net_lock_current();
855 ni = lnet_nid2ni_locked(nid, cpt);
857 lnet_ni_decref_locked(ni, cpt);
858 lnet_net_unlock(cpt);
864 lnet_count_acceptor_nis (void)
866 /* Return the # of NIs that need the acceptor. */
868 struct list_head *tmp;
872 cpt = lnet_net_lock_current();
873 list_for_each(tmp, &the_lnet.ln_nis) {
874 ni = list_entry(tmp, lnet_ni_t, ni_list);
876 if (ni->ni_lnd->lnd_accept != NULL)
880 lnet_net_unlock(cpt);
885 static lnet_ping_info_t *
886 lnet_ping_info_create(int num_ni)
888 lnet_ping_info_t *ping_info;
891 infosz = offsetof(lnet_ping_info_t, pi_ni[num_ni]);
892 LIBCFS_ALLOC(ping_info, infosz);
893 if (ping_info == NULL) {
894 CERROR("Can't allocate ping info[%d]\n", num_ni);
898 ping_info->pi_nnis = num_ni;
899 ping_info->pi_pid = the_lnet.ln_pid;
900 ping_info->pi_magic = LNET_PROTO_PING_MAGIC;
901 ping_info->pi_features = LNET_PING_FEAT_NI_STATUS;
907 lnet_get_ni_count(void)
914 list_for_each_entry(ni, &the_lnet.ln_nis, ni_list)
923 lnet_ping_info_free(lnet_ping_info_t *pinfo)
926 offsetof(lnet_ping_info_t,
927 pi_ni[pinfo->pi_nnis]));
931 lnet_ping_info_destroy(void)
935 lnet_net_lock(LNET_LOCK_EX);
937 list_for_each_entry(ni, &the_lnet.ln_nis, ni_list) {
939 ni->ni_status = NULL;
943 lnet_ping_info_free(the_lnet.ln_ping_info);
944 the_lnet.ln_ping_info = NULL;
946 lnet_net_unlock(LNET_LOCK_EX);
950 lnet_ping_event_handler(lnet_event_t *event)
952 lnet_ping_info_t *pinfo = event->md.user_ptr;
955 pinfo->pi_features = LNET_PING_FEAT_INVAL;
959 lnet_ping_info_setup(lnet_ping_info_t **ppinfo, lnet_handle_md_t *md_handle,
960 int ni_count, bool set_eq)
962 lnet_handle_me_t me_handle;
963 lnet_process_id_t id = {LNET_NID_ANY, LNET_PID_ANY};
964 lnet_md_t md = {NULL};
968 rc = LNetEQAlloc(0, lnet_ping_event_handler,
969 &the_lnet.ln_ping_target_eq);
971 CERROR("Can't allocate ping EQ: %d\n", rc);
976 *ppinfo = lnet_ping_info_create(ni_count);
977 if (*ppinfo == NULL) {
982 rc = LNetMEAttach(LNET_RESERVED_PORTAL, id,
983 LNET_PROTO_PING_MATCHBITS, 0,
984 LNET_UNLINK, LNET_INS_AFTER,
987 CERROR("Can't create ping ME: %d\n", rc);
991 /* initialize md content */
993 md.length = offsetof(lnet_ping_info_t,
994 pi_ni[(*ppinfo)->pi_nnis]);
995 md.threshold = LNET_MD_THRESH_INF;
997 md.options = LNET_MD_OP_GET | LNET_MD_TRUNCATE |
998 LNET_MD_MANAGE_REMOTE;
1000 md.eq_handle = the_lnet.ln_ping_target_eq;
1001 md.user_ptr = *ppinfo;
1003 rc = LNetMDAttach(me_handle, md, LNET_RETAIN, md_handle);
1005 CERROR("Can't attach ping MD: %d\n", rc);
1012 rc2 = LNetMEUnlink(me_handle);
1015 lnet_ping_info_free(*ppinfo);
1019 LNetEQFree(the_lnet.ln_ping_target_eq);
1024 lnet_ping_md_unlink(lnet_ping_info_t *pinfo, lnet_handle_md_t *md_handle)
1026 sigset_t blocked = cfs_block_allsigs();
1028 LNetMDUnlink(*md_handle);
1029 LNetInvalidateHandle(md_handle);
1031 /* NB md could be busy; this just starts the unlink */
1032 while (pinfo->pi_features != LNET_PING_FEAT_INVAL) {
1033 CDEBUG(D_NET, "Still waiting for ping MD to unlink\n");
1034 set_current_state(TASK_UNINTERRUPTIBLE);
1035 schedule_timeout(cfs_time_seconds(1));
1038 cfs_restore_sigs(blocked);
1042 lnet_ping_info_install_locked(lnet_ping_info_t *ping_info)
1046 lnet_ni_status_t *ns;
1049 list_for_each_entry(ni, &the_lnet.ln_nis, ni_list) {
1050 LASSERT(i < ping_info->pi_nnis);
1052 ns = &ping_info->pi_ni[i];
1054 ns->ns_nid = ni->ni_nid;
1057 ns->ns_status = (ni->ni_status != NULL) ?
1058 ni->ni_status->ns_status : LNET_NI_STATUS_UP;
1067 lnet_ping_target_update(lnet_ping_info_t *pinfo, lnet_handle_md_t md_handle)
1069 lnet_ping_info_t *old_pinfo = NULL;
1070 lnet_handle_md_t old_md;
1072 /* switch the NIs to point to the new ping info created */
1073 lnet_net_lock(LNET_LOCK_EX);
1075 if (!the_lnet.ln_routing)
1076 pinfo->pi_features |= LNET_PING_FEAT_RTE_DISABLED;
1077 lnet_ping_info_install_locked(pinfo);
1079 if (the_lnet.ln_ping_info != NULL) {
1080 old_pinfo = the_lnet.ln_ping_info;
1081 old_md = the_lnet.ln_ping_target_md;
1083 the_lnet.ln_ping_target_md = md_handle;
1084 the_lnet.ln_ping_info = pinfo;
1086 lnet_net_unlock(LNET_LOCK_EX);
1088 if (old_pinfo != NULL) {
1089 /* unlink the old ping info */
1090 lnet_ping_md_unlink(old_pinfo, &old_md);
1091 lnet_ping_info_free(old_pinfo);
1096 lnet_ping_target_fini(void)
1100 lnet_ping_md_unlink(the_lnet.ln_ping_info,
1101 &the_lnet.ln_ping_target_md);
1103 rc = LNetEQFree(the_lnet.ln_ping_target_eq);
1106 lnet_ping_info_destroy();
1110 lnet_ni_tq_credits(lnet_ni_t *ni)
1114 LASSERT(ni->ni_ncpts >= 1);
1116 if (ni->ni_ncpts == 1)
1117 return ni->ni_maxtxcredits;
1119 credits = ni->ni_maxtxcredits / ni->ni_ncpts;
1120 credits = max(credits, 8 * ni->ni_peertxcredits);
1121 credits = min(credits, ni->ni_maxtxcredits);
1127 lnet_ni_unlink_locked(lnet_ni_t *ni)
1129 if (!list_empty(&ni->ni_cptlist)) {
1130 list_del_init(&ni->ni_cptlist);
1131 lnet_ni_decref_locked(ni, 0);
1134 /* move it to zombie list and nobody can find it anymore */
1135 LASSERT(!list_empty(&ni->ni_list));
1136 list_move(&ni->ni_list, &the_lnet.ln_nis_zombie);
1137 lnet_ni_decref_locked(ni, 0); /* drop ln_nis' ref */
1141 lnet_clear_zombies_nis_locked(void)
1147 /* Now wait for the NI's I just nuked to show up on ln_zombie_nis
1148 * and shut them down in guaranteed thread context */
1150 while (!list_empty(&the_lnet.ln_nis_zombie)) {
1154 ni = list_entry(the_lnet.ln_nis_zombie.next,
1155 lnet_ni_t, ni_list);
1156 list_del_init(&ni->ni_list);
1157 cfs_percpt_for_each(ref, j, ni->ni_refs) {
1160 /* still busy, add it back to zombie list */
1161 list_add(&ni->ni_list, &the_lnet.ln_nis_zombie);
1165 if (!list_empty(&ni->ni_list)) {
1166 lnet_net_unlock(LNET_LOCK_EX);
1168 if ((i & (-i)) == i) {
1170 "Waiting for zombie LNI %s\n",
1171 libcfs_nid2str(ni->ni_nid));
1173 set_current_state(TASK_UNINTERRUPTIBLE);
1174 schedule_timeout(cfs_time_seconds(1));
1175 lnet_net_lock(LNET_LOCK_EX);
1179 ni->ni_lnd->lnd_refcount--;
1180 lnet_net_unlock(LNET_LOCK_EX);
1182 islo = ni->ni_lnd->lnd_type == LOLND;
1184 LASSERT(!in_interrupt());
1185 (ni->ni_lnd->lnd_shutdown)(ni);
1187 /* can't deref lnd anymore now; it might have unregistered
1191 CDEBUG(D_LNI, "Removed LNI %s\n",
1192 libcfs_nid2str(ni->ni_nid));
1196 lnet_net_lock(LNET_LOCK_EX);
1201 lnet_shutdown_lndnis(void)
1206 /* NB called holding the global mutex */
1208 /* All quiet on the API front */
1209 LASSERT(!the_lnet.ln_shutdown);
1210 LASSERT(the_lnet.ln_refcount == 0);
1211 LASSERT(list_empty(&the_lnet.ln_nis_zombie));
1213 lnet_net_lock(LNET_LOCK_EX);
1214 the_lnet.ln_shutdown = 1; /* flag shutdown */
1216 /* Unlink NIs from the global table */
1217 while (!list_empty(&the_lnet.ln_nis)) {
1218 ni = list_entry(the_lnet.ln_nis.next,
1219 lnet_ni_t, ni_list);
1220 lnet_ni_unlink_locked(ni);
1223 /* Drop the cached loopback NI. */
1224 if (the_lnet.ln_loni != NULL) {
1225 lnet_ni_decref_locked(the_lnet.ln_loni, 0);
1226 the_lnet.ln_loni = NULL;
1229 lnet_net_unlock(LNET_LOCK_EX);
1231 /* Clear lazy portals and drop delayed messages which hold refs
1232 * on their lnet_msg_t::msg_rxpeer */
1233 for (i = 0; i < the_lnet.ln_nportals; i++)
1234 LNetClearLazyPortal(i);
1236 /* Clear the peer table and wait for all peers to go (they hold refs on
1238 lnet_peer_tables_cleanup(NULL);
1240 lnet_net_lock(LNET_LOCK_EX);
1242 lnet_clear_zombies_nis_locked();
1243 the_lnet.ln_shutdown = 0;
1244 lnet_net_unlock(LNET_LOCK_EX);
1247 /* shutdown down the NI and release refcount */
1249 lnet_shutdown_lndni(struct lnet_ni *ni)
1253 lnet_net_lock(LNET_LOCK_EX);
1254 lnet_ni_unlink_locked(ni);
1255 lnet_net_unlock(LNET_LOCK_EX);
1257 /* clear messages for this NI on the lazy portal */
1258 for (i = 0; i < the_lnet.ln_nportals; i++)
1259 lnet_clear_lazy_portal(ni, i, "Shutting down NI");
1261 /* Do peer table cleanup for this ni */
1262 lnet_peer_tables_cleanup(ni);
1264 lnet_net_lock(LNET_LOCK_EX);
1265 lnet_clear_zombies_nis_locked();
1266 lnet_net_unlock(LNET_LOCK_EX);
1270 lnet_startup_lndni(struct lnet_ni *ni, struct lnet_ioctl_config_data *conf)
1272 struct lnet_ioctl_config_lnd_tunables *lnd_tunables = NULL;
1276 struct lnet_tx_queue *tq;
1279 lnd_type = LNET_NETTYP(LNET_NIDNET(ni->ni_nid));
1281 LASSERT(libcfs_isknown_lnd(lnd_type));
1283 if (lnd_type == CIBLND || lnd_type == OPENIBLND ||
1284 lnd_type == IIBLND || lnd_type == VIBLND) {
1285 CERROR("LND %s obsoleted\n", libcfs_lnd2str(lnd_type));
1289 /* Make sure this new NI is unique. */
1290 lnet_net_lock(LNET_LOCK_EX);
1291 rc = lnet_net_unique(LNET_NIDNET(ni->ni_nid), &the_lnet.ln_nis);
1292 lnet_net_unlock(LNET_LOCK_EX);
1295 if (lnd_type == LOLND) {
1300 CERROR("Net %s is not unique\n",
1301 libcfs_net2str(LNET_NIDNET(ni->ni_nid)));
1307 mutex_lock(&the_lnet.ln_lnd_mutex);
1308 lnd = lnet_find_lnd_by_type(lnd_type);
1311 mutex_unlock(&the_lnet.ln_lnd_mutex);
1312 rc = request_module("%s", libcfs_lnd2modname(lnd_type));
1313 mutex_lock(&the_lnet.ln_lnd_mutex);
1315 lnd = lnet_find_lnd_by_type(lnd_type);
1317 mutex_unlock(&the_lnet.ln_lnd_mutex);
1318 CERROR("Can't load LND %s, module %s, rc=%d\n",
1319 libcfs_lnd2str(lnd_type),
1320 libcfs_lnd2modname(lnd_type), rc);
1321 #ifndef HAVE_MODULE_LOADING_SUPPORT
1322 LCONSOLE_ERROR_MSG(0x104, "Your kernel must be "
1323 "compiled with kernel module "
1324 "loading support.");
1331 lnet_net_lock(LNET_LOCK_EX);
1332 lnd->lnd_refcount++;
1333 lnet_net_unlock(LNET_LOCK_EX);
1337 if (conf && conf->cfg_hdr.ioc_len > sizeof(*conf))
1338 lnd_tunables = (struct lnet_ioctl_config_lnd_tunables *)conf->cfg_bulk;
1340 if (lnd_tunables != NULL) {
1341 LIBCFS_ALLOC(ni->ni_lnd_tunables,
1342 sizeof(*ni->ni_lnd_tunables));
1343 if (ni->ni_lnd_tunables == NULL) {
1344 mutex_unlock(&the_lnet.ln_lnd_mutex);
1348 memcpy(ni->ni_lnd_tunables, lnd_tunables,
1349 sizeof(*ni->ni_lnd_tunables));
1352 /* If given some LND tunable parameters, parse those now to
1353 * override the values in the NI structure. */
1355 if (conf->cfg_config_u.cfg_net.net_peer_rtr_credits >= 0)
1356 ni->ni_peerrtrcredits =
1357 conf->cfg_config_u.cfg_net.net_peer_rtr_credits;
1358 if (conf->cfg_config_u.cfg_net.net_peer_timeout >= 0)
1359 ni->ni_peertimeout =
1360 conf->cfg_config_u.cfg_net.net_peer_timeout;
1361 if (conf->cfg_config_u.cfg_net.net_peer_tx_credits >= 0)
1362 ni->ni_peertxcredits =
1363 conf->cfg_config_u.cfg_net.net_peer_tx_credits;
1364 if (conf->cfg_config_u.cfg_net.net_max_tx_credits >= 0)
1365 ni->ni_maxtxcredits =
1366 conf->cfg_config_u.cfg_net.net_max_tx_credits;
1369 rc = (lnd->lnd_startup)(ni);
1371 mutex_unlock(&the_lnet.ln_lnd_mutex);
1374 LCONSOLE_ERROR_MSG(0x105, "Error %d starting up LNI %s\n",
1375 rc, libcfs_lnd2str(lnd->lnd_type));
1376 lnet_net_lock(LNET_LOCK_EX);
1377 lnd->lnd_refcount--;
1378 lnet_net_unlock(LNET_LOCK_EX);
1382 LASSERT(ni->ni_peertimeout <= 0 || lnd->lnd_query != NULL);
1384 lnet_net_lock(LNET_LOCK_EX);
1385 /* refcount for ln_nis */
1386 lnet_ni_addref_locked(ni, 0);
1387 list_add_tail(&ni->ni_list, &the_lnet.ln_nis);
1388 if (ni->ni_cpts != NULL) {
1389 lnet_ni_addref_locked(ni, 0);
1390 list_add_tail(&ni->ni_cptlist, &the_lnet.ln_nis_cpt);
1393 lnet_net_unlock(LNET_LOCK_EX);
1395 if (lnd->lnd_type == LOLND) {
1397 LASSERT(the_lnet.ln_loni == NULL);
1398 the_lnet.ln_loni = ni;
1402 if (ni->ni_peertxcredits == 0 || ni->ni_maxtxcredits == 0) {
1403 LCONSOLE_ERROR_MSG(0x107, "LNI %s has no %scredits\n",
1404 libcfs_lnd2str(lnd->lnd_type),
1405 ni->ni_peertxcredits == 0 ?
1407 /* shutdown the NI since if we get here then it must've already
1410 lnet_shutdown_lndni(ni);
1414 cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
1415 tq->tq_credits_min =
1416 tq->tq_credits_max =
1417 tq->tq_credits = lnet_ni_tq_credits(ni);
1420 CDEBUG(D_LNI, "Added LNI %s [%d/%d/%d/%d]\n",
1421 libcfs_nid2str(ni->ni_nid), ni->ni_peertxcredits,
1422 lnet_ni_tq_credits(ni) * LNET_CPT_NUMBER,
1423 ni->ni_peerrtrcredits, ni->ni_peertimeout);
1432 lnet_startup_lndnis(struct list_head *nilist)
1438 while (!list_empty(nilist)) {
1439 ni = list_entry(nilist->next, lnet_ni_t, ni_list);
1440 list_del(&ni->ni_list);
1441 rc = lnet_startup_lndni(ni, NULL);
1451 lnet_shutdown_lndnis();
1457 * Initialize LNet library.
1459 * Automatically called at module loading time. Caller has to call
1460 * lnet_lib_exit() after a call to lnet_lib_init(), if and only if the
1461 * latter returned 0. It must be called exactly once.
1463 * \retval 0 on success
1464 * \retval -ve on failures.
1466 int lnet_lib_init(void)
1470 lnet_assert_wire_constants();
1472 memset(&the_lnet, 0, sizeof(the_lnet));
1474 /* refer to global cfs_cpt_table for now */
1475 the_lnet.ln_cpt_table = cfs_cpt_table;
1476 the_lnet.ln_cpt_number = cfs_cpt_number(cfs_cpt_table);
1478 LASSERT(the_lnet.ln_cpt_number > 0);
1479 if (the_lnet.ln_cpt_number > LNET_CPT_MAX) {
1480 /* we are under risk of consuming all lh_cookie */
1481 CERROR("Can't have %d CPTs for LNet (max allowed is %d), "
1482 "please change setting of CPT-table and retry\n",
1483 the_lnet.ln_cpt_number, LNET_CPT_MAX);
1487 while ((1 << the_lnet.ln_cpt_bits) < the_lnet.ln_cpt_number)
1488 the_lnet.ln_cpt_bits++;
1490 rc = lnet_create_locks();
1492 CERROR("Can't create LNet global locks: %d\n", rc);
1496 the_lnet.ln_refcount = 0;
1497 LNetInvalidateHandle(&the_lnet.ln_rc_eqh);
1498 INIT_LIST_HEAD(&the_lnet.ln_lnds);
1499 INIT_LIST_HEAD(&the_lnet.ln_rcd_zombie);
1500 INIT_LIST_HEAD(&the_lnet.ln_rcd_deathrow);
1502 /* The hash table size is the number of bits it takes to express the set
1503 * ln_num_routes, minus 1 (better to under estimate than over so we
1504 * don't waste memory). */
1505 if (rnet_htable_size <= 0)
1506 rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT;
1507 else if (rnet_htable_size > LNET_REMOTE_NETS_HASH_MAX)
1508 rnet_htable_size = LNET_REMOTE_NETS_HASH_MAX;
1509 the_lnet.ln_remote_nets_hbits = max_t(int, 1,
1510 order_base_2(rnet_htable_size) - 1);
1512 /* All LNDs apart from the LOLND are in separate modules. They
1513 * register themselves when their module loads, and unregister
1514 * themselves when their module is unloaded. */
1515 lnet_register_lnd(&the_lolnd);
1520 * Finalize LNet library.
1522 * \pre lnet_lib_init() called with success.
1523 * \pre All LNet users called LNetNIFini() for matching LNetNIInit() calls.
1525 void lnet_lib_exit(void)
1527 LASSERT(the_lnet.ln_refcount == 0);
1529 while (!list_empty(&the_lnet.ln_lnds))
1530 lnet_unregister_lnd(list_entry(the_lnet.ln_lnds.next,
1532 lnet_destroy_locks();
1536 * Set LNet PID and start LNet interfaces, routing, and forwarding.
1538 * Users must call this function at least once before any other functions.
1539 * For each successful call there must be a corresponding call to
1540 * LNetNIFini(). For subsequent calls to LNetNIInit(), \a requested_pid is
1543 * The PID used by LNet may be different from the one requested.
1546 * \param requested_pid PID requested by the caller.
1548 * \return >= 0 on success, and < 0 error code on failures.
1551 LNetNIInit(lnet_pid_t requested_pid)
1553 int im_a_router = 0;
1556 lnet_ping_info_t *pinfo;
1557 lnet_handle_md_t md_handle;
1558 struct list_head net_head;
1560 INIT_LIST_HEAD(&net_head);
1562 mutex_lock(&the_lnet.ln_api_mutex);
1564 CDEBUG(D_OTHER, "refs %d\n", the_lnet.ln_refcount);
1566 if (the_lnet.ln_refcount > 0) {
1567 rc = the_lnet.ln_refcount++;
1568 mutex_unlock(&the_lnet.ln_api_mutex);
1572 rc = lnet_prepare(requested_pid);
1574 mutex_unlock(&the_lnet.ln_api_mutex);
1578 /* Add in the loopback network */
1579 if (lnet_ni_alloc(LNET_MKNET(LOLND, 0), NULL, &net_head) == NULL) {
1584 /* If LNet is being initialized via DLC it is possible
1585 * that the user requests not to load module parameters (ones which
1586 * are supported by DLC) on initialization. Therefore, make sure not
1587 * to load networks, routes and forwarding from module parameters
1588 * in this case. On cleanup in case of failure only clean up
1589 * routes if it has been loaded */
1590 if (!the_lnet.ln_nis_from_mod_params) {
1591 rc = lnet_parse_networks(&net_head,
1592 lnet_get_networks());
1597 ni_count = lnet_startup_lndnis(&net_head);
1603 if (!the_lnet.ln_nis_from_mod_params) {
1604 rc = lnet_parse_routes(lnet_get_routes(), &im_a_router);
1608 rc = lnet_check_routes();
1612 rc = lnet_rtrpools_alloc(im_a_router);
1617 rc = lnet_acceptor_start();
1620 the_lnet.ln_refcount = 1;
1621 /* Now I may use my own API functions... */
1623 rc = lnet_ping_info_setup(&pinfo, &md_handle, ni_count, true);
1627 lnet_ping_target_update(pinfo, md_handle);
1629 rc = lnet_router_checker_start();
1636 mutex_unlock(&the_lnet.ln_api_mutex);
1641 lnet_ping_target_fini();
1643 the_lnet.ln_refcount = 0;
1644 lnet_acceptor_stop();
1646 if (!the_lnet.ln_nis_from_mod_params)
1647 lnet_destroy_routes();
1649 lnet_shutdown_lndnis();
1653 mutex_unlock(&the_lnet.ln_api_mutex);
1654 while (!list_empty(&net_head)) {
1656 ni = list_entry(net_head.next, struct lnet_ni, ni_list);
1657 list_del_init(&ni->ni_list);
1662 EXPORT_SYMBOL(LNetNIInit);
1665 * Stop LNet interfaces, routing, and forwarding.
1667 * Users must call this function once for each successful call to LNetNIInit().
1668 * Once the LNetNIFini() operation has been started, the results of pending
1669 * API operations are undefined.
1671 * \return always 0 for current implementation.
1676 mutex_lock(&the_lnet.ln_api_mutex);
1678 LASSERT (the_lnet.ln_refcount > 0);
1680 if (the_lnet.ln_refcount != 1) {
1681 the_lnet.ln_refcount--;
1683 LASSERT(!the_lnet.ln_niinit_self);
1688 lnet_router_checker_stop();
1689 lnet_ping_target_fini();
1691 /* Teardown fns that use my own API functions BEFORE here */
1692 the_lnet.ln_refcount = 0;
1694 lnet_acceptor_stop();
1695 lnet_destroy_routes();
1696 lnet_shutdown_lndnis();
1700 mutex_unlock(&the_lnet.ln_api_mutex);
1703 EXPORT_SYMBOL(LNetNIFini);
1706 * Grabs the ni data from the ni structure and fills the out
1709 * \param[in] ni network interface structure
1710 * \param[out] cpt_count the number of cpts the ni is on
1711 * \param[out] nid Network Interface ID
1712 * \param[out] peer_timeout NI peer timeout
1713 * \param[out] peer_tx_crdits NI peer transmit credits
1714 * \param[out] peer_rtr_credits NI peer router credits
1715 * \param[out] max_tx_credits NI max transmit credit
1716 * \param[out] net_config Network configuration
1719 lnet_fill_ni_info(struct lnet_ni *ni, struct lnet_ioctl_config_data *config)
1721 struct lnet_ioctl_net_config *net_config;
1722 struct lnet_ioctl_config_lnd_tunables *lnd_cfg = NULL;
1723 size_t min_size, tunable_size = 0;
1729 net_config = (struct lnet_ioctl_net_config *) config->cfg_bulk;
1733 CLASSERT(ARRAY_SIZE(ni->ni_interfaces) ==
1734 ARRAY_SIZE(net_config->ni_interfaces));
1736 if (ni->ni_interfaces[0] != NULL) {
1737 for (i = 0; i < ARRAY_SIZE(ni->ni_interfaces); i++) {
1738 if (ni->ni_interfaces[i] != NULL) {
1739 strncpy(net_config->ni_interfaces[i],
1740 ni->ni_interfaces[i],
1741 sizeof(net_config->ni_interfaces[i]));
1746 config->cfg_nid = ni->ni_nid;
1747 config->cfg_config_u.cfg_net.net_peer_timeout = ni->ni_peertimeout;
1748 config->cfg_config_u.cfg_net.net_max_tx_credits = ni->ni_maxtxcredits;
1749 config->cfg_config_u.cfg_net.net_peer_tx_credits = ni->ni_peertxcredits;
1750 config->cfg_config_u.cfg_net.net_peer_rtr_credits = ni->ni_peerrtrcredits;
1752 net_config->ni_status = ni->ni_status->ns_status;
1755 ni->ni_cpts != NULL && i < ni->ni_ncpts &&
1756 i < LNET_MAX_SHOW_NUM_CPT;
1758 net_config->ni_cpts[i] = ni->ni_cpts[i];
1760 config->cfg_ncpts = ni->ni_ncpts;
1763 * See if user land tools sent in a newer and larger version
1764 * of struct lnet_tunables than what the kernel uses.
1766 min_size = sizeof(*config) + sizeof(*net_config);
1768 if (config->cfg_hdr.ioc_len > min_size)
1769 tunable_size = config->cfg_hdr.ioc_len - min_size;
1771 /* Don't copy to much data to user space */
1772 min_size = min(tunable_size, sizeof(*ni->ni_lnd_tunables));
1773 lnd_cfg = (struct lnet_ioctl_config_lnd_tunables *)net_config->cfg_bulk;
1775 if (ni->ni_lnd_tunables && lnd_cfg && min_size) {
1776 memcpy(lnd_cfg, ni->ni_lnd_tunables, min_size);
1777 config->cfg_config_u.cfg_net.net_interface_count = 1;
1779 /* Tell user land that kernel side has less data */
1780 if (tunable_size > sizeof(*ni->ni_lnd_tunables)) {
1781 min_size = tunable_size - sizeof(ni->ni_lnd_tunables);
1782 config->cfg_hdr.ioc_len -= min_size;
1788 lnet_get_net_config(struct lnet_ioctl_config_data *config)
1791 struct list_head *tmp;
1792 int idx = config->cfg_count;
1796 if (unlikely(!config->cfg_bulk))
1799 cpt = lnet_net_lock_current();
1801 list_for_each(tmp, &the_lnet.ln_nis) {
1802 ni = list_entry(tmp, lnet_ni_t, ni_list);
1806 lnet_fill_ni_info(ni, config);
1812 lnet_net_unlock(cpt);
1817 lnet_dyn_add_ni(lnet_pid_t requested_pid, struct lnet_ioctl_config_data *conf)
1819 char *nets = conf->cfg_config_u.cfg_net.net_intf;
1820 lnet_ping_info_t *pinfo;
1821 lnet_handle_md_t md_handle;
1823 struct list_head net_head;
1825 lnet_remotenet_t *rnet;
1827 INIT_LIST_HEAD(&net_head);
1829 /* Create a ni structure for the network string */
1830 rc = lnet_parse_networks(&net_head, nets);
1832 return rc == 0 ? -EINVAL : rc;
1834 mutex_lock(&the_lnet.ln_api_mutex);
1837 rc = -EINVAL; /* only add one interface per call */
1841 ni = list_entry(net_head.next, struct lnet_ni, ni_list);
1843 lnet_net_lock(LNET_LOCK_EX);
1844 rnet = lnet_find_net_locked(LNET_NIDNET(ni->ni_nid));
1845 lnet_net_unlock(LNET_LOCK_EX);
1846 /* make sure that the net added doesn't invalidate the current
1847 * configuration LNet is keeping */
1849 CERROR("Adding net %s will invalidate routing configuration\n",
1855 rc = lnet_ping_info_setup(&pinfo, &md_handle, 1 + lnet_get_ni_count(),
1860 list_del_init(&ni->ni_list);
1862 rc = lnet_startup_lndni(ni, conf);
1866 if (ni->ni_lnd->lnd_accept != NULL) {
1867 rc = lnet_acceptor_start();
1869 /* shutdown the ni that we just started */
1870 CERROR("Failed to start up acceptor thread\n");
1871 lnet_shutdown_lndni(ni);
1876 lnet_ping_target_update(pinfo, md_handle);
1877 mutex_unlock(&the_lnet.ln_api_mutex);
1882 lnet_ping_md_unlink(pinfo, &md_handle);
1883 lnet_ping_info_free(pinfo);
1885 mutex_unlock(&the_lnet.ln_api_mutex);
1886 while (!list_empty(&net_head)) {
1887 ni = list_entry(net_head.next, struct lnet_ni, ni_list);
1888 list_del_init(&ni->ni_list);
1895 lnet_dyn_del_ni(__u32 net)
1898 lnet_ping_info_t *pinfo;
1899 lnet_handle_md_t md_handle;
1902 /* don't allow userspace to shutdown the LOLND */
1903 if (LNET_NETTYP(net) == LOLND)
1906 mutex_lock(&the_lnet.ln_api_mutex);
1907 /* create and link a new ping info, before removing the old one */
1908 rc = lnet_ping_info_setup(&pinfo, &md_handle,
1909 lnet_get_ni_count() - 1, false);
1913 ni = lnet_net2ni(net);
1919 /* decrement the reference counter taken by lnet_net2ni() */
1920 lnet_ni_decref_locked(ni, 0);
1922 lnet_shutdown_lndni(ni);
1924 if (lnet_count_acceptor_nis() == 0)
1925 lnet_acceptor_stop();
1927 lnet_ping_target_update(pinfo, md_handle);
1930 lnet_ping_md_unlink(pinfo, &md_handle);
1931 lnet_ping_info_free(pinfo);
1933 mutex_unlock(&the_lnet.ln_api_mutex);
1939 * LNet ioctl handler.
1943 LNetCtl(unsigned int cmd, void *arg)
1945 struct libcfs_ioctl_data *data = arg;
1946 struct lnet_ioctl_config_data *config;
1947 lnet_process_id_t id = {0};
1951 CLASSERT(LIBCFS_IOC_DATA_MAX >= sizeof(struct lnet_ioctl_net_config) +
1952 sizeof(struct lnet_ioctl_config_data));
1955 case IOC_LIBCFS_GET_NI:
1956 rc = LNetGetId(data->ioc_count, &id);
1957 data->ioc_nid = id.nid;
1960 case IOC_LIBCFS_FAIL_NID:
1961 return lnet_fail_nid(data->ioc_nid, data->ioc_count);
1963 case IOC_LIBCFS_ADD_ROUTE:
1966 if (config->cfg_hdr.ioc_len < sizeof(*config))
1969 mutex_lock(&the_lnet.ln_api_mutex);
1970 rc = lnet_add_route(config->cfg_net,
1971 config->cfg_config_u.cfg_route.rtr_hop,
1973 config->cfg_config_u.cfg_route.
1976 rc = lnet_check_routes();
1978 lnet_del_route(config->cfg_net,
1981 mutex_unlock(&the_lnet.ln_api_mutex);
1984 case IOC_LIBCFS_DEL_ROUTE:
1987 if (config->cfg_hdr.ioc_len < sizeof(*config))
1990 mutex_lock(&the_lnet.ln_api_mutex);
1991 rc = lnet_del_route(config->cfg_net, config->cfg_nid);
1992 mutex_unlock(&the_lnet.ln_api_mutex);
1995 case IOC_LIBCFS_GET_ROUTE:
1998 if (config->cfg_hdr.ioc_len < sizeof(*config))
2001 return lnet_get_route(config->cfg_count,
2003 &config->cfg_config_u.cfg_route.rtr_hop,
2005 &config->cfg_config_u.cfg_route.rtr_flags,
2006 &config->cfg_config_u.cfg_route.
2009 case IOC_LIBCFS_GET_NET: {
2010 size_t total = sizeof(*config) +
2011 sizeof(struct lnet_ioctl_net_config);
2014 if (config->cfg_hdr.ioc_len < total)
2017 return lnet_get_net_config(config);
2020 case IOC_LIBCFS_GET_LNET_STATS:
2022 struct lnet_ioctl_lnet_stats *lnet_stats = arg;
2024 if (lnet_stats->st_hdr.ioc_len < sizeof(*lnet_stats))
2027 lnet_counters_get(&lnet_stats->st_cntrs);
2031 case IOC_LIBCFS_CONFIG_RTR:
2034 if (config->cfg_hdr.ioc_len < sizeof(*config))
2037 mutex_lock(&the_lnet.ln_api_mutex);
2038 if (config->cfg_config_u.cfg_buffers.buf_enable) {
2039 rc = lnet_rtrpools_enable();
2040 mutex_unlock(&the_lnet.ln_api_mutex);
2043 lnet_rtrpools_disable();
2044 mutex_unlock(&the_lnet.ln_api_mutex);
2047 case IOC_LIBCFS_ADD_BUF:
2050 if (config->cfg_hdr.ioc_len < sizeof(*config))
2053 mutex_lock(&the_lnet.ln_api_mutex);
2054 rc = lnet_rtrpools_adjust(config->cfg_config_u.cfg_buffers.
2056 config->cfg_config_u.cfg_buffers.
2058 config->cfg_config_u.cfg_buffers.
2060 mutex_unlock(&the_lnet.ln_api_mutex);
2063 case IOC_LIBCFS_GET_BUF: {
2064 struct lnet_ioctl_pool_cfg *pool_cfg;
2065 size_t total = sizeof(*config) + sizeof(*pool_cfg);
2069 if (config->cfg_hdr.ioc_len < total)
2072 pool_cfg = (struct lnet_ioctl_pool_cfg *)config->cfg_bulk;
2073 return lnet_get_rtr_pool_cfg(config->cfg_count, pool_cfg);
2076 case IOC_LIBCFS_GET_PEER_INFO: {
2077 struct lnet_ioctl_peer *peer_info = arg;
2079 if (peer_info->pr_hdr.ioc_len < sizeof(*peer_info))
2082 return lnet_get_peer_info(
2083 peer_info->pr_count,
2085 peer_info->pr_lnd_u.pr_peer_credits.cr_aliveness,
2086 &peer_info->pr_lnd_u.pr_peer_credits.cr_ncpt,
2087 &peer_info->pr_lnd_u.pr_peer_credits.cr_refcount,
2088 &peer_info->pr_lnd_u.pr_peer_credits.cr_ni_peer_tx_credits,
2089 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_credits,
2090 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_rtr_credits,
2091 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_min_rtr_credits,
2092 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_qnob);
2095 case IOC_LIBCFS_NOTIFY_ROUTER:
2096 return lnet_notify(NULL, data->ioc_nid, data->ioc_flags,
2097 cfs_time_current() -
2098 cfs_time_seconds(cfs_time_current_sec() -
2099 (time_t)data->ioc_u64[0]));
2101 case IOC_LIBCFS_LNET_DIST:
2102 rc = LNetDist(data->ioc_nid, &data->ioc_nid, &data->ioc_u32[1]);
2103 if (rc < 0 && rc != -EHOSTUNREACH)
2106 data->ioc_u32[0] = rc;
2109 case IOC_LIBCFS_TESTPROTOCOMPAT:
2110 lnet_net_lock(LNET_LOCK_EX);
2111 the_lnet.ln_testprotocompat = data->ioc_flags;
2112 lnet_net_unlock(LNET_LOCK_EX);
2115 case IOC_LIBCFS_LNET_FAULT:
2116 return lnet_fault_ctl(data->ioc_flags, data);
2118 case IOC_LIBCFS_PING:
2119 id.nid = data->ioc_nid;
2120 id.pid = data->ioc_u32[0];
2121 rc = lnet_ping(id, data->ioc_u32[1], /* timeout */
2123 data->ioc_plen1/sizeof(lnet_process_id_t));
2126 data->ioc_count = rc;
2130 ni = lnet_net2ni(data->ioc_net);
2134 if (ni->ni_lnd->lnd_ctl == NULL)
2137 rc = ni->ni_lnd->lnd_ctl(ni, cmd, arg);
2144 EXPORT_SYMBOL(LNetCtl);
2146 void LNetDebugPeer(lnet_process_id_t id)
2148 lnet_debug_peer(id.nid);
2150 EXPORT_SYMBOL(LNetDebugPeer);
2153 * Retrieve the lnet_process_id_t ID of LNet interface at \a index. Note that
2154 * all interfaces share a same PID, as requested by LNetNIInit().
2156 * \param index Index of the interface to look up.
2157 * \param id On successful return, this location will hold the
2158 * lnet_process_id_t ID of the interface.
2160 * \retval 0 If an interface exists at \a index.
2161 * \retval -ENOENT If no interface has been found.
2164 LNetGetId(unsigned int index, lnet_process_id_t *id)
2167 struct list_head *tmp;
2171 LASSERT(the_lnet.ln_refcount > 0);
2173 cpt = lnet_net_lock_current();
2175 list_for_each(tmp, &the_lnet.ln_nis) {
2179 ni = list_entry(tmp, lnet_ni_t, ni_list);
2181 id->nid = ni->ni_nid;
2182 id->pid = the_lnet.ln_pid;
2187 lnet_net_unlock(cpt);
2190 EXPORT_SYMBOL(LNetGetId);
2193 * Print a string representation of handle \a h into buffer \a str of
2197 LNetSnprintHandle(char *str, int len, lnet_handle_any_t h)
2199 snprintf(str, len, "%#llx", h.cookie);
2201 EXPORT_SYMBOL(LNetSnprintHandle);
2204 lnet_ping(lnet_process_id_t id, int timeout_ms, lnet_process_id_t __user *ids,
2207 lnet_handle_eq_t eqh;
2208 lnet_handle_md_t mdh;
2210 lnet_md_t md = { NULL };
2214 const int a_long_time = 60000; /* mS */
2216 lnet_ping_info_t *info;
2217 lnet_process_id_t tmpid;
2224 infosz = offsetof(lnet_ping_info_t, pi_ni[n_ids]);
2227 id.nid == LNET_NID_ANY ||
2228 timeout_ms > 500000 || /* arbitrary limit! */
2229 n_ids > 20) /* arbitrary limit! */
2232 if (id.pid == LNET_PID_ANY)
2233 id.pid = LNET_PID_LUSTRE;
2235 LIBCFS_ALLOC(info, infosz);
2239 /* NB 2 events max (including any unlink event) */
2240 rc = LNetEQAlloc(2, LNET_EQ_HANDLER_NONE, &eqh);
2242 CERROR("Can't allocate EQ: %d\n", rc);
2246 /* initialize md content */
2249 md.threshold = 2; /*GET/REPLY*/
2251 md.options = LNET_MD_TRUNCATE;
2255 rc = LNetMDBind(md, LNET_UNLINK, &mdh);
2257 CERROR("Can't bind MD: %d\n", rc);
2261 rc = LNetGet(LNET_NID_ANY, mdh, id,
2262 LNET_RESERVED_PORTAL,
2263 LNET_PROTO_PING_MATCHBITS, 0);
2266 /* Don't CERROR; this could be deliberate! */
2268 rc2 = LNetMDUnlink(mdh);
2271 /* NB must wait for the UNLINK event below... */
2273 timeout_ms = a_long_time;
2277 /* MUST block for unlink to complete */
2279 blocked = cfs_block_allsigs();
2281 rc2 = LNetEQPoll(&eqh, 1, timeout_ms, &event, &which);
2284 cfs_restore_sigs(blocked);
2286 CDEBUG(D_NET, "poll %d(%d %d)%s\n", rc2,
2287 (rc2 <= 0) ? -1 : event.type,
2288 (rc2 <= 0) ? -1 : event.status,
2289 (rc2 > 0 && event.unlinked) ? " unlinked" : "");
2291 LASSERT(rc2 != -EOVERFLOW); /* can't miss anything */
2293 if (rc2 <= 0 || event.status != 0) {
2294 /* timeout or error */
2295 if (!replied && rc == 0)
2296 rc = (rc2 < 0) ? rc2 :
2297 (rc2 == 0) ? -ETIMEDOUT :
2301 /* Ensure completion in finite time... */
2303 /* No assertion (racing with network) */
2305 timeout_ms = a_long_time;
2306 } else if (rc2 == 0) {
2307 /* timed out waiting for unlink */
2308 CWARN("ping %s: late network completion\n",
2311 } else if (event.type == LNET_EVENT_REPLY) {
2316 } while (rc2 <= 0 || !event.unlinked);
2320 CWARN("%s: Unexpected rc >= 0 but no reply!\n",
2327 LASSERT(nob >= 0 && nob <= infosz);
2329 rc = -EPROTO; /* if I can't parse... */
2332 /* can't check magic/version */
2333 CERROR("%s: ping info too short %d\n",
2334 libcfs_id2str(id), nob);
2338 if (info->pi_magic == __swab32(LNET_PROTO_PING_MAGIC)) {
2339 lnet_swap_pinginfo(info);
2340 } else if (info->pi_magic != LNET_PROTO_PING_MAGIC) {
2341 CERROR("%s: Unexpected magic %08x\n",
2342 libcfs_id2str(id), info->pi_magic);
2346 if ((info->pi_features & LNET_PING_FEAT_NI_STATUS) == 0) {
2347 CERROR("%s: ping w/o NI status: 0x%x\n",
2348 libcfs_id2str(id), info->pi_features);
2352 if (nob < offsetof(lnet_ping_info_t, pi_ni[0])) {
2353 CERROR("%s: Short reply %d(%d min)\n", libcfs_id2str(id),
2354 nob, (int)offsetof(lnet_ping_info_t, pi_ni[0]));
2358 if (info->pi_nnis < n_ids)
2359 n_ids = info->pi_nnis;
2361 if (nob < offsetof(lnet_ping_info_t, pi_ni[n_ids])) {
2362 CERROR("%s: Short reply %d(%d expected)\n", libcfs_id2str(id),
2363 nob, (int)offsetof(lnet_ping_info_t, pi_ni[n_ids]));
2367 rc = -EFAULT; /* If I SEGV... */
2369 memset(&tmpid, 0, sizeof(tmpid));
2370 for (i = 0; i < n_ids; i++) {
2371 tmpid.pid = info->pi_pid;
2372 tmpid.nid = info->pi_ni[i].ns_nid;
2373 if (copy_to_user(&ids[i], &tmpid, sizeof(tmpid)))
2379 rc2 = LNetEQFree(eqh);
2381 CERROR("rc2 %d\n", rc2);
2385 LIBCFS_FREE(info, infosz);