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 rc = (lnd->lnd_startup)(ni);
1354 mutex_unlock(&the_lnet.ln_lnd_mutex);
1357 LCONSOLE_ERROR_MSG(0x105, "Error %d starting up LNI %s\n",
1358 rc, libcfs_lnd2str(lnd->lnd_type));
1359 lnet_net_lock(LNET_LOCK_EX);
1360 lnd->lnd_refcount--;
1361 lnet_net_unlock(LNET_LOCK_EX);
1365 /* If given some LND tunable parameters, parse those now to
1366 * override the values in the NI structure. */
1367 if (conf && conf->cfg_config_u.cfg_net.net_peer_rtr_credits >= 0) {
1368 ni->ni_peerrtrcredits =
1369 conf->cfg_config_u.cfg_net.net_peer_rtr_credits;
1371 if (conf && conf->cfg_config_u.cfg_net.net_peer_timeout >= 0) {
1372 ni->ni_peertimeout =
1373 conf->cfg_config_u.cfg_net.net_peer_timeout;
1378 * Note: For now, don't allow the user to change
1379 * peertxcredits as this number is used in the
1380 * IB LND to control queue depth.
1382 * if (conf && conf->cfg_config_u.cfg_net.net_peer_tx_credits != -1)
1383 * ni->ni_peertxcredits =
1384 * conf->cfg_config_u.cfg_net.net_peer_tx_credits;
1386 if (conf && conf->cfg_config_u.cfg_net.net_max_tx_credits >= 0) {
1387 ni->ni_maxtxcredits =
1388 conf->cfg_config_u.cfg_net.net_max_tx_credits;
1391 LASSERT(ni->ni_peertimeout <= 0 || lnd->lnd_query != NULL);
1393 lnet_net_lock(LNET_LOCK_EX);
1394 /* refcount for ln_nis */
1395 lnet_ni_addref_locked(ni, 0);
1396 list_add_tail(&ni->ni_list, &the_lnet.ln_nis);
1397 if (ni->ni_cpts != NULL) {
1398 lnet_ni_addref_locked(ni, 0);
1399 list_add_tail(&ni->ni_cptlist, &the_lnet.ln_nis_cpt);
1402 lnet_net_unlock(LNET_LOCK_EX);
1404 if (lnd->lnd_type == LOLND) {
1406 LASSERT(the_lnet.ln_loni == NULL);
1407 the_lnet.ln_loni = ni;
1411 if (ni->ni_peertxcredits == 0 || ni->ni_maxtxcredits == 0) {
1412 LCONSOLE_ERROR_MSG(0x107, "LNI %s has no %scredits\n",
1413 libcfs_lnd2str(lnd->lnd_type),
1414 ni->ni_peertxcredits == 0 ?
1416 /* shutdown the NI since if we get here then it must've already
1419 lnet_shutdown_lndni(ni);
1423 cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
1424 tq->tq_credits_min =
1425 tq->tq_credits_max =
1426 tq->tq_credits = lnet_ni_tq_credits(ni);
1429 CDEBUG(D_LNI, "Added LNI %s [%d/%d/%d/%d]\n",
1430 libcfs_nid2str(ni->ni_nid), ni->ni_peertxcredits,
1431 lnet_ni_tq_credits(ni) * LNET_CPT_NUMBER,
1432 ni->ni_peerrtrcredits, ni->ni_peertimeout);
1441 lnet_startup_lndnis(struct list_head *nilist)
1447 while (!list_empty(nilist)) {
1448 ni = list_entry(nilist->next, lnet_ni_t, ni_list);
1449 list_del(&ni->ni_list);
1450 rc = lnet_startup_lndni(ni, NULL);
1460 lnet_shutdown_lndnis();
1466 * Initialize LNet library.
1468 * Automatically called at module loading time. Caller has to call
1469 * lnet_lib_exit() after a call to lnet_lib_init(), if and only if the
1470 * latter returned 0. It must be called exactly once.
1472 * \retval 0 on success
1473 * \retval -ve on failures.
1475 int lnet_lib_init(void)
1479 lnet_assert_wire_constants();
1481 memset(&the_lnet, 0, sizeof(the_lnet));
1483 /* refer to global cfs_cpt_table for now */
1484 the_lnet.ln_cpt_table = cfs_cpt_table;
1485 the_lnet.ln_cpt_number = cfs_cpt_number(cfs_cpt_table);
1487 LASSERT(the_lnet.ln_cpt_number > 0);
1488 if (the_lnet.ln_cpt_number > LNET_CPT_MAX) {
1489 /* we are under risk of consuming all lh_cookie */
1490 CERROR("Can't have %d CPTs for LNet (max allowed is %d), "
1491 "please change setting of CPT-table and retry\n",
1492 the_lnet.ln_cpt_number, LNET_CPT_MAX);
1496 while ((1 << the_lnet.ln_cpt_bits) < the_lnet.ln_cpt_number)
1497 the_lnet.ln_cpt_bits++;
1499 rc = lnet_create_locks();
1501 CERROR("Can't create LNet global locks: %d\n", rc);
1505 the_lnet.ln_refcount = 0;
1506 LNetInvalidateHandle(&the_lnet.ln_rc_eqh);
1507 INIT_LIST_HEAD(&the_lnet.ln_lnds);
1508 INIT_LIST_HEAD(&the_lnet.ln_rcd_zombie);
1509 INIT_LIST_HEAD(&the_lnet.ln_rcd_deathrow);
1511 /* The hash table size is the number of bits it takes to express the set
1512 * ln_num_routes, minus 1 (better to under estimate than over so we
1513 * don't waste memory). */
1514 if (rnet_htable_size <= 0)
1515 rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT;
1516 else if (rnet_htable_size > LNET_REMOTE_NETS_HASH_MAX)
1517 rnet_htable_size = LNET_REMOTE_NETS_HASH_MAX;
1518 the_lnet.ln_remote_nets_hbits = max_t(int, 1,
1519 order_base_2(rnet_htable_size) - 1);
1521 /* All LNDs apart from the LOLND are in separate modules. They
1522 * register themselves when their module loads, and unregister
1523 * themselves when their module is unloaded. */
1524 lnet_register_lnd(&the_lolnd);
1529 * Finalize LNet library.
1531 * \pre lnet_lib_init() called with success.
1532 * \pre All LNet users called LNetNIFini() for matching LNetNIInit() calls.
1534 void lnet_lib_exit(void)
1536 LASSERT(the_lnet.ln_refcount == 0);
1538 while (!list_empty(&the_lnet.ln_lnds))
1539 lnet_unregister_lnd(list_entry(the_lnet.ln_lnds.next,
1541 lnet_destroy_locks();
1545 * Set LNet PID and start LNet interfaces, routing, and forwarding.
1547 * Users must call this function at least once before any other functions.
1548 * For each successful call there must be a corresponding call to
1549 * LNetNIFini(). For subsequent calls to LNetNIInit(), \a requested_pid is
1552 * The PID used by LNet may be different from the one requested.
1555 * \param requested_pid PID requested by the caller.
1557 * \return >= 0 on success, and < 0 error code on failures.
1560 LNetNIInit(lnet_pid_t requested_pid)
1562 int im_a_router = 0;
1565 lnet_ping_info_t *pinfo;
1566 lnet_handle_md_t md_handle;
1567 struct list_head net_head;
1569 INIT_LIST_HEAD(&net_head);
1571 mutex_lock(&the_lnet.ln_api_mutex);
1573 CDEBUG(D_OTHER, "refs %d\n", the_lnet.ln_refcount);
1575 if (the_lnet.ln_refcount > 0) {
1576 rc = the_lnet.ln_refcount++;
1577 mutex_unlock(&the_lnet.ln_api_mutex);
1581 rc = lnet_prepare(requested_pid);
1583 mutex_unlock(&the_lnet.ln_api_mutex);
1587 /* Add in the loopback network */
1588 if (lnet_ni_alloc(LNET_MKNET(LOLND, 0), NULL, &net_head) == NULL) {
1593 /* If LNet is being initialized via DLC it is possible
1594 * that the user requests not to load module parameters (ones which
1595 * are supported by DLC) on initialization. Therefore, make sure not
1596 * to load networks, routes and forwarding from module parameters
1597 * in this case. On cleanup in case of failure only clean up
1598 * routes if it has been loaded */
1599 if (!the_lnet.ln_nis_from_mod_params) {
1600 rc = lnet_parse_networks(&net_head,
1601 lnet_get_networks());
1606 ni_count = lnet_startup_lndnis(&net_head);
1612 if (!the_lnet.ln_nis_from_mod_params) {
1613 rc = lnet_parse_routes(lnet_get_routes(), &im_a_router);
1617 rc = lnet_check_routes();
1621 rc = lnet_rtrpools_alloc(im_a_router);
1626 rc = lnet_acceptor_start();
1629 the_lnet.ln_refcount = 1;
1630 /* Now I may use my own API functions... */
1632 rc = lnet_ping_info_setup(&pinfo, &md_handle, ni_count, true);
1636 lnet_ping_target_update(pinfo, md_handle);
1638 rc = lnet_router_checker_start();
1645 mutex_unlock(&the_lnet.ln_api_mutex);
1650 lnet_ping_target_fini();
1652 the_lnet.ln_refcount = 0;
1653 lnet_acceptor_stop();
1655 if (!the_lnet.ln_nis_from_mod_params)
1656 lnet_destroy_routes();
1658 lnet_shutdown_lndnis();
1662 mutex_unlock(&the_lnet.ln_api_mutex);
1663 while (!list_empty(&net_head)) {
1665 ni = list_entry(net_head.next, struct lnet_ni, ni_list);
1666 list_del_init(&ni->ni_list);
1671 EXPORT_SYMBOL(LNetNIInit);
1674 * Stop LNet interfaces, routing, and forwarding.
1676 * Users must call this function once for each successful call to LNetNIInit().
1677 * Once the LNetNIFini() operation has been started, the results of pending
1678 * API operations are undefined.
1680 * \return always 0 for current implementation.
1685 mutex_lock(&the_lnet.ln_api_mutex);
1687 LASSERT (the_lnet.ln_refcount > 0);
1689 if (the_lnet.ln_refcount != 1) {
1690 the_lnet.ln_refcount--;
1692 LASSERT(!the_lnet.ln_niinit_self);
1697 lnet_router_checker_stop();
1698 lnet_ping_target_fini();
1700 /* Teardown fns that use my own API functions BEFORE here */
1701 the_lnet.ln_refcount = 0;
1703 lnet_acceptor_stop();
1704 lnet_destroy_routes();
1705 lnet_shutdown_lndnis();
1709 mutex_unlock(&the_lnet.ln_api_mutex);
1712 EXPORT_SYMBOL(LNetNIFini);
1715 * Grabs the ni data from the ni structure and fills the out
1718 * \param[in] ni network interface structure
1719 * \param[out] cpt_count the number of cpts the ni is on
1720 * \param[out] nid Network Interface ID
1721 * \param[out] peer_timeout NI peer timeout
1722 * \param[out] peer_tx_crdits NI peer transmit credits
1723 * \param[out] peer_rtr_credits NI peer router credits
1724 * \param[out] max_tx_credits NI max transmit credit
1725 * \param[out] net_config Network configuration
1728 lnet_fill_ni_info(struct lnet_ni *ni, struct lnet_ioctl_config_data *config)
1730 struct lnet_ioctl_net_config *net_config;
1731 struct lnet_ioctl_config_lnd_tunables *lnd_cfg = NULL;
1732 size_t min_size, tunable_size = 0;
1738 net_config = (struct lnet_ioctl_net_config *) config->cfg_bulk;
1742 CLASSERT(ARRAY_SIZE(ni->ni_interfaces) ==
1743 ARRAY_SIZE(net_config->ni_interfaces));
1745 if (ni->ni_interfaces[0] != NULL) {
1746 for (i = 0; i < ARRAY_SIZE(ni->ni_interfaces); i++) {
1747 if (ni->ni_interfaces[i] != NULL) {
1748 strncpy(net_config->ni_interfaces[i],
1749 ni->ni_interfaces[i],
1750 sizeof(net_config->ni_interfaces[i]));
1755 config->cfg_nid = ni->ni_nid;
1756 config->cfg_config_u.cfg_net.net_peer_timeout = ni->ni_peertimeout;
1757 config->cfg_config_u.cfg_net.net_max_tx_credits = ni->ni_maxtxcredits;
1758 config->cfg_config_u.cfg_net.net_peer_tx_credits = ni->ni_peertxcredits;
1759 config->cfg_config_u.cfg_net.net_peer_rtr_credits = ni->ni_peerrtrcredits;
1761 net_config->ni_status = ni->ni_status->ns_status;
1764 ni->ni_cpts != NULL && i < ni->ni_ncpts &&
1765 i < LNET_MAX_SHOW_NUM_CPT;
1767 net_config->ni_cpts[i] = ni->ni_cpts[i];
1769 config->cfg_ncpts = ni->ni_ncpts;
1772 * See if user land tools sent in a newer and larger version
1773 * of struct lnet_tunables than what the kernel uses.
1775 min_size = sizeof(*config) + sizeof(*net_config);
1777 if (config->cfg_hdr.ioc_len > min_size)
1778 tunable_size = config->cfg_hdr.ioc_len - min_size;
1780 /* Don't copy to much data to user space */
1781 min_size = min(tunable_size, sizeof(*ni->ni_lnd_tunables));
1782 lnd_cfg = (struct lnet_ioctl_config_lnd_tunables *)net_config->cfg_bulk;
1784 if (ni->ni_lnd_tunables && lnd_cfg && min_size) {
1785 memcpy(lnd_cfg, ni->ni_lnd_tunables, min_size);
1786 config->cfg_config_u.cfg_net.net_interface_count = 1;
1788 /* Tell user land that kernel side has less data */
1789 if (tunable_size > sizeof(*ni->ni_lnd_tunables)) {
1790 min_size = tunable_size - sizeof(ni->ni_lnd_tunables);
1791 config->cfg_hdr.ioc_len -= min_size;
1797 lnet_get_net_config(struct lnet_ioctl_config_data *config)
1800 struct list_head *tmp;
1801 int idx = config->cfg_count;
1805 if (unlikely(!config->cfg_bulk))
1808 cpt = lnet_net_lock_current();
1810 list_for_each(tmp, &the_lnet.ln_nis) {
1811 ni = list_entry(tmp, lnet_ni_t, ni_list);
1815 lnet_fill_ni_info(ni, config);
1821 lnet_net_unlock(cpt);
1826 lnet_dyn_add_ni(lnet_pid_t requested_pid, struct lnet_ioctl_config_data *conf)
1828 char *nets = conf->cfg_config_u.cfg_net.net_intf;
1829 lnet_ping_info_t *pinfo;
1830 lnet_handle_md_t md_handle;
1832 struct list_head net_head;
1834 lnet_remotenet_t *rnet;
1836 INIT_LIST_HEAD(&net_head);
1838 /* Create a ni structure for the network string */
1839 rc = lnet_parse_networks(&net_head, nets);
1841 return rc == 0 ? -EINVAL : rc;
1843 mutex_lock(&the_lnet.ln_api_mutex);
1846 rc = -EINVAL; /* only add one interface per call */
1850 ni = list_entry(net_head.next, struct lnet_ni, ni_list);
1852 lnet_net_lock(LNET_LOCK_EX);
1853 rnet = lnet_find_net_locked(LNET_NIDNET(ni->ni_nid));
1854 lnet_net_unlock(LNET_LOCK_EX);
1855 /* make sure that the net added doesn't invalidate the current
1856 * configuration LNet is keeping */
1858 CERROR("Adding net %s will invalidate routing configuration\n",
1864 rc = lnet_ping_info_setup(&pinfo, &md_handle, 1 + lnet_get_ni_count(),
1869 list_del_init(&ni->ni_list);
1871 rc = lnet_startup_lndni(ni, conf);
1875 if (ni->ni_lnd->lnd_accept != NULL) {
1876 rc = lnet_acceptor_start();
1878 /* shutdown the ni that we just started */
1879 CERROR("Failed to start up acceptor thread\n");
1880 lnet_shutdown_lndni(ni);
1885 lnet_ping_target_update(pinfo, md_handle);
1886 mutex_unlock(&the_lnet.ln_api_mutex);
1891 lnet_ping_md_unlink(pinfo, &md_handle);
1892 lnet_ping_info_free(pinfo);
1894 mutex_unlock(&the_lnet.ln_api_mutex);
1895 while (!list_empty(&net_head)) {
1896 ni = list_entry(net_head.next, struct lnet_ni, ni_list);
1897 list_del_init(&ni->ni_list);
1904 lnet_dyn_del_ni(__u32 net)
1907 lnet_ping_info_t *pinfo;
1908 lnet_handle_md_t md_handle;
1911 /* don't allow userspace to shutdown the LOLND */
1912 if (LNET_NETTYP(net) == LOLND)
1915 mutex_lock(&the_lnet.ln_api_mutex);
1916 /* create and link a new ping info, before removing the old one */
1917 rc = lnet_ping_info_setup(&pinfo, &md_handle,
1918 lnet_get_ni_count() - 1, false);
1922 ni = lnet_net2ni(net);
1928 /* decrement the reference counter taken by lnet_net2ni() */
1929 lnet_ni_decref_locked(ni, 0);
1931 lnet_shutdown_lndni(ni);
1933 if (lnet_count_acceptor_nis() == 0)
1934 lnet_acceptor_stop();
1936 lnet_ping_target_update(pinfo, md_handle);
1939 lnet_ping_md_unlink(pinfo, &md_handle);
1940 lnet_ping_info_free(pinfo);
1942 mutex_unlock(&the_lnet.ln_api_mutex);
1948 * LNet ioctl handler.
1952 LNetCtl(unsigned int cmd, void *arg)
1954 struct libcfs_ioctl_data *data = arg;
1955 struct lnet_ioctl_config_data *config;
1956 lnet_process_id_t id = {0};
1960 CLASSERT(LIBCFS_IOC_DATA_MAX >= sizeof(struct lnet_ioctl_net_config) +
1961 sizeof(struct lnet_ioctl_config_data));
1964 case IOC_LIBCFS_GET_NI:
1965 rc = LNetGetId(data->ioc_count, &id);
1966 data->ioc_nid = id.nid;
1969 case IOC_LIBCFS_FAIL_NID:
1970 return lnet_fail_nid(data->ioc_nid, data->ioc_count);
1972 case IOC_LIBCFS_ADD_ROUTE:
1975 if (config->cfg_hdr.ioc_len < sizeof(*config))
1978 mutex_lock(&the_lnet.ln_api_mutex);
1979 rc = lnet_add_route(config->cfg_net,
1980 config->cfg_config_u.cfg_route.rtr_hop,
1982 config->cfg_config_u.cfg_route.
1985 rc = lnet_check_routes();
1987 lnet_del_route(config->cfg_net,
1990 mutex_unlock(&the_lnet.ln_api_mutex);
1993 case IOC_LIBCFS_DEL_ROUTE:
1996 if (config->cfg_hdr.ioc_len < sizeof(*config))
1999 mutex_lock(&the_lnet.ln_api_mutex);
2000 rc = lnet_del_route(config->cfg_net, config->cfg_nid);
2001 mutex_unlock(&the_lnet.ln_api_mutex);
2004 case IOC_LIBCFS_GET_ROUTE:
2007 if (config->cfg_hdr.ioc_len < sizeof(*config))
2010 return lnet_get_route(config->cfg_count,
2012 &config->cfg_config_u.cfg_route.rtr_hop,
2014 &config->cfg_config_u.cfg_route.rtr_flags,
2015 &config->cfg_config_u.cfg_route.
2018 case IOC_LIBCFS_GET_NET: {
2019 size_t total = sizeof(*config) +
2020 sizeof(struct lnet_ioctl_net_config);
2023 if (config->cfg_hdr.ioc_len < total)
2026 return lnet_get_net_config(config);
2029 case IOC_LIBCFS_GET_LNET_STATS:
2031 struct lnet_ioctl_lnet_stats *lnet_stats = arg;
2033 if (lnet_stats->st_hdr.ioc_len < sizeof(*lnet_stats))
2036 lnet_counters_get(&lnet_stats->st_cntrs);
2040 case IOC_LIBCFS_CONFIG_RTR:
2043 if (config->cfg_hdr.ioc_len < sizeof(*config))
2046 mutex_lock(&the_lnet.ln_api_mutex);
2047 if (config->cfg_config_u.cfg_buffers.buf_enable) {
2048 rc = lnet_rtrpools_enable();
2049 mutex_unlock(&the_lnet.ln_api_mutex);
2052 lnet_rtrpools_disable();
2053 mutex_unlock(&the_lnet.ln_api_mutex);
2056 case IOC_LIBCFS_ADD_BUF:
2059 if (config->cfg_hdr.ioc_len < sizeof(*config))
2062 mutex_lock(&the_lnet.ln_api_mutex);
2063 rc = lnet_rtrpools_adjust(config->cfg_config_u.cfg_buffers.
2065 config->cfg_config_u.cfg_buffers.
2067 config->cfg_config_u.cfg_buffers.
2069 mutex_unlock(&the_lnet.ln_api_mutex);
2072 case IOC_LIBCFS_GET_BUF: {
2073 struct lnet_ioctl_pool_cfg *pool_cfg;
2074 size_t total = sizeof(*config) + sizeof(*pool_cfg);
2078 if (config->cfg_hdr.ioc_len < total)
2081 pool_cfg = (struct lnet_ioctl_pool_cfg *)config->cfg_bulk;
2082 return lnet_get_rtr_pool_cfg(config->cfg_count, pool_cfg);
2085 case IOC_LIBCFS_GET_PEER_INFO: {
2086 struct lnet_ioctl_peer *peer_info = arg;
2088 if (peer_info->pr_hdr.ioc_len < sizeof(*peer_info))
2091 return lnet_get_peer_info(
2092 peer_info->pr_count,
2094 peer_info->pr_lnd_u.pr_peer_credits.cr_aliveness,
2095 &peer_info->pr_lnd_u.pr_peer_credits.cr_ncpt,
2096 &peer_info->pr_lnd_u.pr_peer_credits.cr_refcount,
2097 &peer_info->pr_lnd_u.pr_peer_credits.cr_ni_peer_tx_credits,
2098 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_credits,
2099 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_rtr_credits,
2100 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_min_rtr_credits,
2101 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_qnob);
2104 case IOC_LIBCFS_NOTIFY_ROUTER:
2105 return lnet_notify(NULL, data->ioc_nid, data->ioc_flags,
2106 cfs_time_current() -
2107 cfs_time_seconds(cfs_time_current_sec() -
2108 (time_t)data->ioc_u64[0]));
2110 case IOC_LIBCFS_LNET_DIST:
2111 rc = LNetDist(data->ioc_nid, &data->ioc_nid, &data->ioc_u32[1]);
2112 if (rc < 0 && rc != -EHOSTUNREACH)
2115 data->ioc_u32[0] = rc;
2118 case IOC_LIBCFS_TESTPROTOCOMPAT:
2119 lnet_net_lock(LNET_LOCK_EX);
2120 the_lnet.ln_testprotocompat = data->ioc_flags;
2121 lnet_net_unlock(LNET_LOCK_EX);
2124 case IOC_LIBCFS_LNET_FAULT:
2125 return lnet_fault_ctl(data->ioc_flags, data);
2127 case IOC_LIBCFS_PING:
2128 id.nid = data->ioc_nid;
2129 id.pid = data->ioc_u32[0];
2130 rc = lnet_ping(id, data->ioc_u32[1], /* timeout */
2132 data->ioc_plen1/sizeof(lnet_process_id_t));
2135 data->ioc_count = rc;
2139 ni = lnet_net2ni(data->ioc_net);
2143 if (ni->ni_lnd->lnd_ctl == NULL)
2146 rc = ni->ni_lnd->lnd_ctl(ni, cmd, arg);
2153 EXPORT_SYMBOL(LNetCtl);
2155 void LNetDebugPeer(lnet_process_id_t id)
2157 lnet_debug_peer(id.nid);
2159 EXPORT_SYMBOL(LNetDebugPeer);
2162 * Retrieve the lnet_process_id_t ID of LNet interface at \a index. Note that
2163 * all interfaces share a same PID, as requested by LNetNIInit().
2165 * \param index Index of the interface to look up.
2166 * \param id On successful return, this location will hold the
2167 * lnet_process_id_t ID of the interface.
2169 * \retval 0 If an interface exists at \a index.
2170 * \retval -ENOENT If no interface has been found.
2173 LNetGetId(unsigned int index, lnet_process_id_t *id)
2176 struct list_head *tmp;
2180 LASSERT(the_lnet.ln_refcount > 0);
2182 cpt = lnet_net_lock_current();
2184 list_for_each(tmp, &the_lnet.ln_nis) {
2188 ni = list_entry(tmp, lnet_ni_t, ni_list);
2190 id->nid = ni->ni_nid;
2191 id->pid = the_lnet.ln_pid;
2196 lnet_net_unlock(cpt);
2199 EXPORT_SYMBOL(LNetGetId);
2202 * Print a string representation of handle \a h into buffer \a str of
2206 LNetSnprintHandle(char *str, int len, lnet_handle_any_t h)
2208 snprintf(str, len, "%#llx", h.cookie);
2210 EXPORT_SYMBOL(LNetSnprintHandle);
2213 lnet_ping(lnet_process_id_t id, int timeout_ms, lnet_process_id_t __user *ids,
2216 lnet_handle_eq_t eqh;
2217 lnet_handle_md_t mdh;
2219 lnet_md_t md = { NULL };
2223 const int a_long_time = 60000; /* mS */
2225 lnet_ping_info_t *info;
2226 lnet_process_id_t tmpid;
2233 infosz = offsetof(lnet_ping_info_t, pi_ni[n_ids]);
2236 id.nid == LNET_NID_ANY ||
2237 timeout_ms > 500000 || /* arbitrary limit! */
2238 n_ids > 20) /* arbitrary limit! */
2241 if (id.pid == LNET_PID_ANY)
2242 id.pid = LNET_PID_LUSTRE;
2244 LIBCFS_ALLOC(info, infosz);
2248 /* NB 2 events max (including any unlink event) */
2249 rc = LNetEQAlloc(2, LNET_EQ_HANDLER_NONE, &eqh);
2251 CERROR("Can't allocate EQ: %d\n", rc);
2255 /* initialize md content */
2258 md.threshold = 2; /*GET/REPLY*/
2260 md.options = LNET_MD_TRUNCATE;
2264 rc = LNetMDBind(md, LNET_UNLINK, &mdh);
2266 CERROR("Can't bind MD: %d\n", rc);
2270 rc = LNetGet(LNET_NID_ANY, mdh, id,
2271 LNET_RESERVED_PORTAL,
2272 LNET_PROTO_PING_MATCHBITS, 0);
2275 /* Don't CERROR; this could be deliberate! */
2277 rc2 = LNetMDUnlink(mdh);
2280 /* NB must wait for the UNLINK event below... */
2282 timeout_ms = a_long_time;
2286 /* MUST block for unlink to complete */
2288 blocked = cfs_block_allsigs();
2290 rc2 = LNetEQPoll(&eqh, 1, timeout_ms, &event, &which);
2293 cfs_restore_sigs(blocked);
2295 CDEBUG(D_NET, "poll %d(%d %d)%s\n", rc2,
2296 (rc2 <= 0) ? -1 : event.type,
2297 (rc2 <= 0) ? -1 : event.status,
2298 (rc2 > 0 && event.unlinked) ? " unlinked" : "");
2300 LASSERT(rc2 != -EOVERFLOW); /* can't miss anything */
2302 if (rc2 <= 0 || event.status != 0) {
2303 /* timeout or error */
2304 if (!replied && rc == 0)
2305 rc = (rc2 < 0) ? rc2 :
2306 (rc2 == 0) ? -ETIMEDOUT :
2310 /* Ensure completion in finite time... */
2312 /* No assertion (racing with network) */
2314 timeout_ms = a_long_time;
2315 } else if (rc2 == 0) {
2316 /* timed out waiting for unlink */
2317 CWARN("ping %s: late network completion\n",
2320 } else if (event.type == LNET_EVENT_REPLY) {
2325 } while (rc2 <= 0 || !event.unlinked);
2329 CWARN("%s: Unexpected rc >= 0 but no reply!\n",
2336 LASSERT(nob >= 0 && nob <= infosz);
2338 rc = -EPROTO; /* if I can't parse... */
2341 /* can't check magic/version */
2342 CERROR("%s: ping info too short %d\n",
2343 libcfs_id2str(id), nob);
2347 if (info->pi_magic == __swab32(LNET_PROTO_PING_MAGIC)) {
2348 lnet_swap_pinginfo(info);
2349 } else if (info->pi_magic != LNET_PROTO_PING_MAGIC) {
2350 CERROR("%s: Unexpected magic %08x\n",
2351 libcfs_id2str(id), info->pi_magic);
2355 if ((info->pi_features & LNET_PING_FEAT_NI_STATUS) == 0) {
2356 CERROR("%s: ping w/o NI status: 0x%x\n",
2357 libcfs_id2str(id), info->pi_features);
2361 if (nob < offsetof(lnet_ping_info_t, pi_ni[0])) {
2362 CERROR("%s: Short reply %d(%d min)\n", libcfs_id2str(id),
2363 nob, (int)offsetof(lnet_ping_info_t, pi_ni[0]));
2367 if (info->pi_nnis < n_ids)
2368 n_ids = info->pi_nnis;
2370 if (nob < offsetof(lnet_ping_info_t, pi_ni[n_ids])) {
2371 CERROR("%s: Short reply %d(%d expected)\n", libcfs_id2str(id),
2372 nob, (int)offsetof(lnet_ping_info_t, pi_ni[n_ids]));
2376 rc = -EFAULT; /* If I SEGV... */
2378 memset(&tmpid, 0, sizeof(tmpid));
2379 for (i = 0; i < n_ids; i++) {
2380 tmpid.pid = info->pi_pid;
2381 tmpid.nid = info->pi_ni[i].ns_nid;
2382 if (copy_to_user(&ids[i], &tmpid, sizeof(tmpid)))
2388 rc2 = LNetEQFree(eqh);
2390 CERROR("rc2 %d\n", rc2);
2394 LIBCFS_FREE(info, infosz);