1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #define DEBUG_SUBSYSTEM S_LNET
38 #include <lnet/lib-lnet.h>
41 #define D_LNI D_CONSOLE
43 #define D_LNI D_CONFIG
46 lnet_t the_lnet; /* THE state of the network */
50 static char *ip2nets = "";
51 CFS_MODULE_PARM(ip2nets, "s", charp, 0444,
52 "LNET network <- IP table");
54 static char *networks = "";
55 CFS_MODULE_PARM(networks, "s", charp, 0444,
58 static char *routes = "";
59 CFS_MODULE_PARM(routes, "s", charp, 0444,
60 "routes to non-local networks");
69 lnet_get_networks(void)
74 if (*networks != 0 && *ip2nets != 0) {
75 LCONSOLE_ERROR_MSG(0x101, "Please specify EITHER 'networks' or "
76 "'ip2nets' but not both at once\n");
81 rc = lnet_parse_ip2nets(&nets, ip2nets);
82 return (rc == 0) ? nets : NULL;
94 cfs_spin_lock_init (&the_lnet.ln_lock);
95 cfs_waitq_init (&the_lnet.ln_waitq);
96 cfs_init_mutex(&the_lnet.ln_lnd_mutex);
97 cfs_init_mutex(&the_lnet.ln_api_mutex);
101 lnet_fini_locks(void)
108 lnet_get_routes(void)
110 char *str = getenv("LNET_ROUTES");
112 return (str == NULL) ? "" : str;
116 lnet_get_networks (void)
118 static char default_networks[256];
119 char *networks = getenv ("LNET_NETWORKS");
120 char *ip2nets = getenv ("LNET_IP2NETS");
129 if (networks != NULL && ip2nets != NULL) {
130 LCONSOLE_ERROR_MSG(0x103, "Please set EITHER 'LNET_NETWORKS' or"
131 " 'LNET_IP2NETS' but not both at once\n");
135 if (ip2nets != NULL) {
136 rc = lnet_parse_ip2nets(&networks, ip2nets);
137 return (rc == 0) ? networks : NULL;
143 if (networks != NULL)
146 /* In userland, the default 'networks=' is the list of known net types */
148 len = sizeof(default_networks);
149 str = default_networks;
153 cfs_list_for_each (tmp, &the_lnet.ln_lnds) {
154 lnd_t *lnd = cfs_list_entry(tmp, lnd_t, lnd_list);
156 nob = snprintf(str, len, "%s%s", sep,
157 libcfs_lnd2str(lnd->lnd_type));
160 /* overflowed the string; leave it where it was */
169 return default_networks;
172 # ifndef HAVE_LIBPTHREAD
174 void lnet_init_locks(void)
176 the_lnet.ln_lock = 0;
177 the_lnet.ln_lnd_mutex = 0;
178 the_lnet.ln_api_mutex = 0;
181 void lnet_fini_locks(void)
183 LASSERT (the_lnet.ln_api_mutex == 0);
184 LASSERT (the_lnet.ln_lnd_mutex == 0);
185 LASSERT (the_lnet.ln_lock == 0);
190 void lnet_init_locks(void)
192 pthread_cond_init(&the_lnet.ln_cond, NULL);
193 pthread_mutex_init(&the_lnet.ln_lock, NULL);
194 pthread_mutex_init(&the_lnet.ln_lnd_mutex, NULL);
195 pthread_mutex_init(&the_lnet.ln_api_mutex, NULL);
198 void lnet_fini_locks(void)
200 pthread_mutex_destroy(&the_lnet.ln_api_mutex);
201 pthread_mutex_destroy(&the_lnet.ln_lnd_mutex);
202 pthread_mutex_destroy(&the_lnet.ln_lock);
203 pthread_cond_destroy(&the_lnet.ln_cond);
209 void lnet_assert_wire_constants (void)
211 /* Wire protocol assertions generated by 'wirecheck'
212 * running on Linux robert.bartonsoftware.com 2.6.8-1.521
213 * #1 Mon Aug 16 09:01:18 EDT 2004 i686 athlon i386 GNU/Linux
214 * with gcc version 3.3.3 20040412 (Red Hat Linux 3.3.3-7) */
217 CLASSERT (LNET_PROTO_TCP_MAGIC == 0xeebc0ded);
218 CLASSERT (LNET_PROTO_TCP_VERSION_MAJOR == 1);
219 CLASSERT (LNET_PROTO_TCP_VERSION_MINOR == 0);
220 CLASSERT (LNET_MSG_ACK == 0);
221 CLASSERT (LNET_MSG_PUT == 1);
222 CLASSERT (LNET_MSG_GET == 2);
223 CLASSERT (LNET_MSG_REPLY == 3);
224 CLASSERT (LNET_MSG_HELLO == 4);
226 /* Checks for struct ptl_handle_wire_t */
227 CLASSERT ((int)sizeof(lnet_handle_wire_t) == 16);
228 CLASSERT ((int)offsetof(lnet_handle_wire_t, wh_interface_cookie) == 0);
229 CLASSERT ((int)sizeof(((lnet_handle_wire_t *)0)->wh_interface_cookie) == 8);
230 CLASSERT ((int)offsetof(lnet_handle_wire_t, wh_object_cookie) == 8);
231 CLASSERT ((int)sizeof(((lnet_handle_wire_t *)0)->wh_object_cookie) == 8);
233 /* Checks for struct lnet_magicversion_t */
234 CLASSERT ((int)sizeof(lnet_magicversion_t) == 8);
235 CLASSERT ((int)offsetof(lnet_magicversion_t, magic) == 0);
236 CLASSERT ((int)sizeof(((lnet_magicversion_t *)0)->magic) == 4);
237 CLASSERT ((int)offsetof(lnet_magicversion_t, version_major) == 4);
238 CLASSERT ((int)sizeof(((lnet_magicversion_t *)0)->version_major) == 2);
239 CLASSERT ((int)offsetof(lnet_magicversion_t, version_minor) == 6);
240 CLASSERT ((int)sizeof(((lnet_magicversion_t *)0)->version_minor) == 2);
242 /* Checks for struct lnet_hdr_t */
243 CLASSERT ((int)sizeof(lnet_hdr_t) == 72);
244 CLASSERT ((int)offsetof(lnet_hdr_t, dest_nid) == 0);
245 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->dest_nid) == 8);
246 CLASSERT ((int)offsetof(lnet_hdr_t, src_nid) == 8);
247 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->src_nid) == 8);
248 CLASSERT ((int)offsetof(lnet_hdr_t, dest_pid) == 16);
249 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->dest_pid) == 4);
250 CLASSERT ((int)offsetof(lnet_hdr_t, src_pid) == 20);
251 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->src_pid) == 4);
252 CLASSERT ((int)offsetof(lnet_hdr_t, type) == 24);
253 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->type) == 4);
254 CLASSERT ((int)offsetof(lnet_hdr_t, payload_length) == 28);
255 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->payload_length) == 4);
256 CLASSERT ((int)offsetof(lnet_hdr_t, msg) == 32);
257 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg) == 40);
260 CLASSERT ((int)offsetof(lnet_hdr_t, msg.ack.dst_wmd) == 32);
261 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.ack.dst_wmd) == 16);
262 CLASSERT ((int)offsetof(lnet_hdr_t, msg.ack.match_bits) == 48);
263 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.ack.match_bits) == 8);
264 CLASSERT ((int)offsetof(lnet_hdr_t, msg.ack.mlength) == 56);
265 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.ack.mlength) == 4);
268 CLASSERT ((int)offsetof(lnet_hdr_t, msg.put.ack_wmd) == 32);
269 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.put.ack_wmd) == 16);
270 CLASSERT ((int)offsetof(lnet_hdr_t, msg.put.match_bits) == 48);
271 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.put.match_bits) == 8);
272 CLASSERT ((int)offsetof(lnet_hdr_t, msg.put.hdr_data) == 56);
273 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.put.hdr_data) == 8);
274 CLASSERT ((int)offsetof(lnet_hdr_t, msg.put.ptl_index) == 64);
275 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.put.ptl_index) == 4);
276 CLASSERT ((int)offsetof(lnet_hdr_t, msg.put.offset) == 68);
277 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.put.offset) == 4);
280 CLASSERT ((int)offsetof(lnet_hdr_t, msg.get.return_wmd) == 32);
281 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.get.return_wmd) == 16);
282 CLASSERT ((int)offsetof(lnet_hdr_t, msg.get.match_bits) == 48);
283 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.get.match_bits) == 8);
284 CLASSERT ((int)offsetof(lnet_hdr_t, msg.get.ptl_index) == 56);
285 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.get.ptl_index) == 4);
286 CLASSERT ((int)offsetof(lnet_hdr_t, msg.get.src_offset) == 60);
287 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.get.src_offset) == 4);
288 CLASSERT ((int)offsetof(lnet_hdr_t, msg.get.sink_length) == 64);
289 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.get.sink_length) == 4);
292 CLASSERT ((int)offsetof(lnet_hdr_t, msg.reply.dst_wmd) == 32);
293 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.reply.dst_wmd) == 16);
296 CLASSERT ((int)offsetof(lnet_hdr_t, msg.hello.incarnation) == 32);
297 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.hello.incarnation) == 8);
298 CLASSERT ((int)offsetof(lnet_hdr_t, msg.hello.type) == 40);
299 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.hello.type) == 4);
303 lnet_find_lnd_by_type (int type)
308 /* holding lnd mutex */
309 cfs_list_for_each (tmp, &the_lnet.ln_lnds) {
310 lnd = cfs_list_entry(tmp, lnd_t, lnd_list);
312 if ((int)lnd->lnd_type == type)
320 lnet_register_lnd (lnd_t *lnd)
322 LNET_MUTEX_DOWN(&the_lnet.ln_lnd_mutex);
324 LASSERT (the_lnet.ln_init);
325 LASSERT (libcfs_isknown_lnd(lnd->lnd_type));
326 LASSERT (lnet_find_lnd_by_type(lnd->lnd_type) == NULL);
328 cfs_list_add_tail (&lnd->lnd_list, &the_lnet.ln_lnds);
329 lnd->lnd_refcount = 0;
331 CDEBUG(D_NET, "%s LND registered\n", libcfs_lnd2str(lnd->lnd_type));
333 LNET_MUTEX_UP(&the_lnet.ln_lnd_mutex);
337 lnet_unregister_lnd (lnd_t *lnd)
339 LNET_MUTEX_DOWN(&the_lnet.ln_lnd_mutex);
341 LASSERT (the_lnet.ln_init);
342 LASSERT (lnet_find_lnd_by_type(lnd->lnd_type) == lnd);
343 LASSERT (lnd->lnd_refcount == 0);
345 cfs_list_del (&lnd->lnd_list);
346 CDEBUG(D_NET, "%s LND unregistered\n", libcfs_lnd2str(lnd->lnd_type));
348 LNET_MUTEX_UP(&the_lnet.ln_lnd_mutex);
351 #ifndef LNET_USE_LIB_FREELIST
354 lnet_descriptor_setup (void)
360 lnet_descriptor_cleanup (void)
367 lnet_freelist_init (lnet_freelist_t *fl, int n, int size)
373 size += offsetof (lnet_freeobj_t, fo_contents);
375 LIBCFS_ALLOC(space, n * size);
379 CFS_INIT_LIST_HEAD (&fl->fl_list);
382 fl->fl_objsize = size;
386 memset (space, 0, size);
387 cfs_list_add ((cfs_list_t *)space, &fl->fl_list);
395 lnet_freelist_fini (lnet_freelist_t *fl)
400 if (fl->fl_nobjs == 0)
404 for (el = fl->fl_list.next; el != &fl->fl_list; el = el->next)
407 LASSERT (count == fl->fl_nobjs);
409 LIBCFS_FREE(fl->fl_objs, fl->fl_nobjs * fl->fl_objsize);
410 memset (fl, 0, sizeof (*fl));
414 lnet_descriptor_setup (void)
416 /* NB on failure caller must still call lnet_descriptor_cleanup */
420 memset (&the_lnet.ln_free_mes, 0, sizeof (the_lnet.ln_free_mes));
421 memset (&the_lnet.ln_free_msgs, 0, sizeof (the_lnet.ln_free_msgs));
422 memset (&the_lnet.ln_free_mds, 0, sizeof (the_lnet.ln_free_mds));
423 memset (&the_lnet.ln_free_eqs, 0, sizeof (the_lnet.ln_free_eqs));
425 rc = lnet_freelist_init(&the_lnet.ln_free_mes,
426 MAX_MES, sizeof (lnet_me_t));
430 rc = lnet_freelist_init(&the_lnet.ln_free_msgs,
431 MAX_MSGS, sizeof (lnet_msg_t));
435 rc = lnet_freelist_init(&the_lnet.ln_free_mds,
436 MAX_MDS, sizeof (lnet_libmd_t));
440 rc = lnet_freelist_init(&the_lnet.ln_free_eqs,
441 MAX_EQS, sizeof (lnet_eq_t));
446 lnet_descriptor_cleanup (void)
448 lnet_freelist_fini (&the_lnet.ln_free_mes);
449 lnet_freelist_fini (&the_lnet.ln_free_msgs);
450 lnet_freelist_fini (&the_lnet.ln_free_mds);
451 lnet_freelist_fini (&the_lnet.ln_free_eqs);
457 lnet_create_interface_cookie (void)
459 /* NB the interface cookie in wire handles guards against delayed
460 * replies and ACKs appearing valid after reboot. Initialisation time,
461 * even if it's only implemented to millisecond resolution is probably
462 * easily good enough. */
466 int rc = gettimeofday (&tv, NULL);
469 cfs_gettimeofday(&tv);
473 cookie += tv.tv_usec;
478 lnet_setup_handle_hash (void)
482 /* Arbitrary choice of hash table size */
484 the_lnet.ln_lh_hash_size =
485 (2 * CFS_PAGE_SIZE) / sizeof (cfs_list_t);
487 the_lnet.ln_lh_hash_size = (MAX_MES + MAX_MDS + MAX_EQS)/4;
489 LIBCFS_ALLOC(the_lnet.ln_lh_hash_table,
490 the_lnet.ln_lh_hash_size * sizeof (cfs_list_t));
491 if (the_lnet.ln_lh_hash_table == NULL)
494 for (i = 0; i < the_lnet.ln_lh_hash_size; i++)
495 CFS_INIT_LIST_HEAD (&the_lnet.ln_lh_hash_table[i]);
497 the_lnet.ln_next_object_cookie = LNET_COOKIE_TYPES;
503 lnet_cleanup_handle_hash (void)
505 if (the_lnet.ln_lh_hash_table == NULL)
508 LIBCFS_FREE(the_lnet.ln_lh_hash_table,
509 the_lnet.ln_lh_hash_size * sizeof (cfs_list_t));
513 lnet_lookup_cookie (__u64 cookie, int type)
515 /* ALWAYS called with LNET_LOCK held */
520 if ((cookie & (LNET_COOKIE_TYPES - 1)) != type)
523 hash = ((unsigned int)(cookie >> LNET_COOKIE_TYPE_BITS)) % the_lnet.ln_lh_hash_size;
524 list = &the_lnet.ln_lh_hash_table[hash];
526 cfs_list_for_each (el, list) {
527 lnet_libhandle_t *lh = cfs_list_entry (el, lnet_libhandle_t,
530 if (lh->lh_cookie == cookie)
538 lnet_initialise_handle (lnet_libhandle_t *lh, int type)
540 /* ALWAYS called with LNET_LOCK held */
543 LASSERT (type >= 0 && type < LNET_COOKIE_TYPES);
544 lh->lh_cookie = the_lnet.ln_next_object_cookie | type;
545 the_lnet.ln_next_object_cookie += LNET_COOKIE_TYPES;
547 hash = ((unsigned int)(lh->lh_cookie >> LNET_COOKIE_TYPE_BITS)) % the_lnet.ln_lh_hash_size;
548 cfs_list_add (&lh->lh_hash_chain, &the_lnet.ln_lh_hash_table[hash]);
552 lnet_invalidate_handle (lnet_libhandle_t *lh)
554 /* ALWAYS called with LNET_LOCK held */
555 cfs_list_del (&lh->lh_hash_chain);
559 lnet_portal_mhash_alloc(void)
564 LIBCFS_ALLOC(mhash, sizeof(cfs_list_t) * LNET_PORTAL_HASH_SIZE);
568 for (i = 0; i < LNET_PORTAL_HASH_SIZE; i++)
569 CFS_INIT_LIST_HEAD(&mhash[i]);
575 lnet_portal_mhash_free(cfs_list_t *mhash)
579 for (i = 0; i < LNET_PORTAL_HASH_SIZE; i++) {
580 while (!cfs_list_empty(&mhash[i])) {
581 lnet_me_t *me = cfs_list_entry(mhash[i].next,
583 CERROR ("Active ME %p on exit portal mhash\n", me);
584 cfs_list_del(&me->me_list);
588 LIBCFS_FREE(mhash, sizeof(cfs_list_t) * LNET_PORTAL_HASH_SIZE);
592 lnet_init_finalizers(void)
597 the_lnet.ln_nfinalizers = (int) cfs_num_online_cpus();
599 LIBCFS_ALLOC(the_lnet.ln_finalizers,
600 the_lnet.ln_nfinalizers *
601 sizeof(*the_lnet.ln_finalizers));
602 if (the_lnet.ln_finalizers == NULL) {
603 CERROR("Can't allocate ln_finalizers\n");
607 for (i = 0; i < the_lnet.ln_nfinalizers; i++)
608 the_lnet.ln_finalizers[i] = NULL;
610 the_lnet.ln_finalizing = 0;
613 CFS_INIT_LIST_HEAD(&the_lnet.ln_finalizeq);
618 lnet_fini_finalizers(void)
623 for (i = 0; i < the_lnet.ln_nfinalizers; i++)
624 LASSERT (the_lnet.ln_finalizers[i] == NULL);
626 LIBCFS_FREE(the_lnet.ln_finalizers,
627 the_lnet.ln_nfinalizers *
628 sizeof(*the_lnet.ln_finalizers));
630 LASSERT (!the_lnet.ln_finalizing);
632 LASSERT (cfs_list_empty(&the_lnet.ln_finalizeq));
637 * Reserved API - do not use.
638 * Temporary workaround to allow uOSS and test programs force server
639 * mode in userspace. See comments near ln_server_mode_flag in
640 * lnet/lib-types.h */
644 the_lnet.ln_server_mode_flag = 1;
649 lnet_prepare(lnet_pid_t requested_pid)
651 /* Prepare to bring up the network */
655 LASSERT (the_lnet.ln_refcount == 0);
657 the_lnet.ln_routing = 0;
660 LASSERT ((requested_pid & LNET_PID_USERFLAG) == 0);
661 the_lnet.ln_pid = requested_pid;
663 if (the_lnet.ln_server_mode_flag) {/* server case (uOSS) */
664 LASSERT ((requested_pid & LNET_PID_USERFLAG) == 0);
666 if (cfs_curproc_uid())/* Only root can run user-space server */
668 the_lnet.ln_pid = requested_pid;
670 } else {/* client case (liblustre) */
672 /* My PID must be unique on this node and flag I'm userspace */
673 the_lnet.ln_pid = getpid() | LNET_PID_USERFLAG;
677 rc = lnet_descriptor_setup();
681 memset(&the_lnet.ln_counters, 0,
682 sizeof(the_lnet.ln_counters));
684 CFS_INIT_LIST_HEAD (&the_lnet.ln_active_msgs);
685 CFS_INIT_LIST_HEAD (&the_lnet.ln_active_mds);
686 CFS_INIT_LIST_HEAD (&the_lnet.ln_active_eqs);
687 CFS_INIT_LIST_HEAD (&the_lnet.ln_test_peers);
688 CFS_INIT_LIST_HEAD (&the_lnet.ln_nis);
689 CFS_INIT_LIST_HEAD (&the_lnet.ln_zombie_nis);
690 CFS_INIT_LIST_HEAD (&the_lnet.ln_remote_nets);
691 CFS_INIT_LIST_HEAD (&the_lnet.ln_routers);
693 the_lnet.ln_interface_cookie = lnet_create_interface_cookie();
695 lnet_init_rtrpools();
697 rc = lnet_setup_handle_hash ();
701 rc = lnet_create_peer_table();
705 rc = lnet_init_finalizers();
709 the_lnet.ln_nportals = MAX_PORTALS;
710 LIBCFS_ALLOC(the_lnet.ln_portals,
711 the_lnet.ln_nportals *
712 sizeof(*the_lnet.ln_portals));
713 if (the_lnet.ln_portals == NULL) {
718 for (i = 0; i < the_lnet.ln_nportals; i++) {
719 CFS_INIT_LIST_HEAD(&(the_lnet.ln_portals[i].ptl_mlist));
720 CFS_INIT_LIST_HEAD(&(the_lnet.ln_portals[i].ptl_msgq));
721 the_lnet.ln_portals[i].ptl_options = 0;
727 lnet_fini_finalizers();
729 lnet_destroy_peer_table();
731 lnet_cleanup_handle_hash();
733 lnet_descriptor_cleanup();
738 lnet_unprepare (void)
742 /* NB no LNET_LOCK since this is the last reference. All LND instances
743 * have shut down already, so it is safe to unlink and free all
744 * descriptors, even those that appear committed to a network op (eg MD
745 * with non-zero pending count) */
747 lnet_fail_nid(LNET_NID_ANY, 0);
749 LASSERT (cfs_list_empty(&the_lnet.ln_test_peers));
750 LASSERT (the_lnet.ln_refcount == 0);
751 LASSERT (cfs_list_empty(&the_lnet.ln_nis));
752 LASSERT (cfs_list_empty(&the_lnet.ln_zombie_nis));
753 LASSERT (the_lnet.ln_nzombie_nis == 0);
755 for (idx = 0; idx < the_lnet.ln_nportals; idx++) {
756 lnet_portal_t *ptl = &the_lnet.ln_portals[idx];
758 LASSERT (cfs_list_empty(&ptl->ptl_msgq));
760 while (!cfs_list_empty(&ptl->ptl_mlist)) {
761 lnet_me_t *me = cfs_list_entry(ptl->ptl_mlist.next,
763 CERROR ("Active ME %p on exit\n", me);
764 cfs_list_del (&me->me_list);
768 if (ptl->ptl_mhash != NULL) {
769 LASSERT (lnet_portal_is_unique(ptl));
770 lnet_portal_mhash_free(ptl->ptl_mhash);
774 while (!cfs_list_empty (&the_lnet.ln_active_mds)) {
775 lnet_libmd_t *md = cfs_list_entry (the_lnet.ln_active_mds.next,
776 lnet_libmd_t, md_list);
778 CERROR ("Active MD %p on exit\n", md);
779 cfs_list_del_init (&md->md_list);
783 while (!cfs_list_empty (&the_lnet.ln_active_eqs)) {
784 lnet_eq_t *eq = cfs_list_entry (the_lnet.ln_active_eqs.next,
787 CERROR ("Active EQ %p on exit\n", eq);
788 cfs_list_del (&eq->eq_list);
792 while (!cfs_list_empty (&the_lnet.ln_active_msgs)) {
793 lnet_msg_t *msg = cfs_list_entry (the_lnet.ln_active_msgs.next,
794 lnet_msg_t, msg_activelist);
796 CERROR ("Active msg %p on exit\n", msg);
797 LASSERT (msg->msg_onactivelist);
798 msg->msg_onactivelist = 0;
799 cfs_list_del (&msg->msg_activelist);
803 LIBCFS_FREE(the_lnet.ln_portals,
804 the_lnet.ln_nportals * sizeof(*the_lnet.ln_portals));
806 lnet_free_rtrpools();
807 lnet_fini_finalizers();
808 lnet_destroy_peer_table();
809 lnet_cleanup_handle_hash();
810 lnet_descriptor_cleanup();
816 lnet_net2ni_locked (__u32 net)
821 cfs_list_for_each (tmp, &the_lnet.ln_nis) {
822 ni = cfs_list_entry(tmp, lnet_ni_t, ni_list);
824 if (LNET_NIDNET(ni->ni_nid) == net) {
825 lnet_ni_addref_locked(ni);
834 lnet_islocalnet (__u32 net)
839 ni = lnet_net2ni_locked(net);
841 lnet_ni_decref_locked(ni);
848 lnet_nid2ni_locked (lnet_nid_t nid)
853 cfs_list_for_each (tmp, &the_lnet.ln_nis) {
854 ni = cfs_list_entry(tmp, lnet_ni_t, ni_list);
856 if (ni->ni_nid == nid) {
857 lnet_ni_addref_locked(ni);
866 lnet_islocalnid (lnet_nid_t nid)
871 ni = lnet_nid2ni_locked(nid);
873 lnet_ni_decref_locked(ni);
880 lnet_count_acceptor_nis (void)
882 /* Return the # of NIs that need the acceptor. */
884 #if defined(__KERNEL__) || defined(HAVE_LIBPTHREAD)
889 cfs_list_for_each (tmp, &the_lnet.ln_nis) {
890 ni = cfs_list_entry(tmp, lnet_ni_t, ni_list);
892 if (ni->ni_lnd->lnd_accept != NULL)
898 #endif /* defined(__KERNEL__) || defined(HAVE_LIBPTHREAD) */
903 lnet_shutdown_lndnis (void)
909 /* NB called holding the global mutex */
911 /* All quiet on the API front */
912 LASSERT (!the_lnet.ln_shutdown);
913 LASSERT (the_lnet.ln_refcount == 0);
914 LASSERT (cfs_list_empty(&the_lnet.ln_zombie_nis));
915 LASSERT (the_lnet.ln_nzombie_nis == 0);
916 LASSERT (cfs_list_empty(&the_lnet.ln_remote_nets));
919 the_lnet.ln_shutdown = 1; /* flag shutdown */
921 /* Unlink NIs from the global table */
922 while (!cfs_list_empty(&the_lnet.ln_nis)) {
923 ni = cfs_list_entry(the_lnet.ln_nis.next,
925 cfs_list_del (&ni->ni_list);
927 the_lnet.ln_nzombie_nis++;
928 lnet_ni_decref_locked(ni); /* drop apini's ref */
931 /* Drop the cached eqwait NI. */
932 if (the_lnet.ln_eqwaitni != NULL) {
933 lnet_ni_decref_locked(the_lnet.ln_eqwaitni);
934 the_lnet.ln_eqwaitni = NULL;
937 /* Drop the cached loopback NI. */
938 if (the_lnet.ln_loni != NULL) {
939 lnet_ni_decref_locked(the_lnet.ln_loni);
940 the_lnet.ln_loni = NULL;
945 /* Clear lazy portals and drop delayed messages which hold refs
946 * on their lnet_msg_t::msg_rxpeer */
947 for (i = 0; i < the_lnet.ln_nportals; i++)
948 LNetClearLazyPortal(i);
950 /* Clear the peer table and wait for all peers to go (they hold refs on
952 lnet_clear_peer_table();
955 /* Now wait for the NI's I just nuked to show up on apini_zombie_nis
956 * and shut them down in guaranteed thread context */
958 while (the_lnet.ln_nzombie_nis != 0) {
960 while (cfs_list_empty(&the_lnet.ln_zombie_nis)) {
964 CDEBUG(D_WARNING,"Waiting for %d zombie NIs\n",
965 the_lnet.ln_nzombie_nis);
966 cfs_pause(cfs_time_seconds(1));
970 ni = cfs_list_entry(the_lnet.ln_zombie_nis.next,
972 cfs_list_del(&ni->ni_list);
973 ni->ni_lnd->lnd_refcount--;
977 islo = ni->ni_lnd->lnd_type == LOLND;
979 LASSERT (!cfs_in_interrupt ());
980 (ni->ni_lnd->lnd_shutdown)(ni);
982 /* can't deref lnd anymore now; it might have unregistered
986 CDEBUG(D_LNI, "Removed LNI %s\n",
987 libcfs_nid2str(ni->ni_nid));
989 LIBCFS_FREE(ni, sizeof(*ni));
992 the_lnet.ln_nzombie_nis--;
995 the_lnet.ln_shutdown = 0;
998 if (the_lnet.ln_network_tokens != NULL) {
999 LIBCFS_FREE(the_lnet.ln_network_tokens,
1000 the_lnet.ln_network_tokens_nob);
1001 the_lnet.ln_network_tokens = NULL;
1006 lnet_startup_lndnis (void)
1014 char *nets = lnet_get_networks();
1016 CFS_INIT_LIST_HEAD(&nilist);
1021 rc = lnet_parse_networks(&nilist, nets);
1025 while (!cfs_list_empty(&nilist)) {
1026 ni = cfs_list_entry(nilist.next, lnet_ni_t, ni_list);
1027 lnd_type = LNET_NETTYP(LNET_NIDNET(ni->ni_nid));
1029 LASSERT (libcfs_isknown_lnd(lnd_type));
1031 if (lnd_type == CIBLND ||
1032 lnd_type == OPENIBLND ||
1033 lnd_type == IIBLND ||
1034 lnd_type == VIBLND) {
1035 CERROR("LND %s obsoleted\n",
1036 libcfs_lnd2str(lnd_type));
1040 LNET_MUTEX_DOWN(&the_lnet.ln_lnd_mutex);
1041 lnd = lnet_find_lnd_by_type(lnd_type);
1045 LNET_MUTEX_UP(&the_lnet.ln_lnd_mutex);
1046 rc = cfs_request_module("%s",
1047 libcfs_lnd2modname(lnd_type));
1048 LNET_MUTEX_DOWN(&the_lnet.ln_lnd_mutex);
1050 lnd = lnet_find_lnd_by_type(lnd_type);
1052 LNET_MUTEX_UP(&the_lnet.ln_lnd_mutex);
1053 CERROR("Can't load LND %s, module %s, rc=%d\n",
1054 libcfs_lnd2str(lnd_type),
1055 libcfs_lnd2modname(lnd_type), rc);
1056 #ifndef HAVE_MODULE_LOADING_SUPPORT
1057 LCONSOLE_ERROR_MSG(0x104, "Your kernel must be "
1058 "compiled with kernel module "
1059 "loading support.");
1066 LNET_MUTEX_UP(&the_lnet.ln_lnd_mutex);
1067 CERROR("LND %s not supported\n",
1068 libcfs_lnd2str(lnd_type));
1073 ni->ni_refcount = 1;
1076 lnd->lnd_refcount++;
1081 rc = (lnd->lnd_startup)(ni);
1083 LNET_MUTEX_UP(&the_lnet.ln_lnd_mutex);
1086 LCONSOLE_ERROR_MSG(0x105, "Error %d starting up LNI %s"
1088 rc, libcfs_lnd2str(lnd->lnd_type));
1090 lnd->lnd_refcount--;
1095 LASSERT (ni->ni_peertimeout <= 0 || lnd->lnd_query != NULL);
1097 cfs_list_del(&ni->ni_list);
1100 cfs_list_add_tail(&ni->ni_list, &the_lnet.ln_nis);
1103 if (lnd->lnd_type == LOLND) {
1105 LASSERT (the_lnet.ln_loni == NULL);
1106 the_lnet.ln_loni = ni;
1111 if (lnd->lnd_wait != NULL) {
1112 if (the_lnet.ln_eqwaitni == NULL) {
1114 the_lnet.ln_eqwaitni = ni;
1117 # ifndef HAVE_LIBPTHREAD
1118 LCONSOLE_ERROR_MSG(0x106, "LND %s not supported in a "
1119 "single-threaded runtime\n",
1120 libcfs_lnd2str(lnd_type));
1125 if (ni->ni_peertxcredits == 0 ||
1126 ni->ni_maxtxcredits == 0) {
1127 LCONSOLE_ERROR_MSG(0x107, "LNI %s has no %scredits\n",
1128 libcfs_lnd2str(lnd->lnd_type),
1129 ni->ni_peertxcredits == 0 ?
1134 ni->ni_txcredits = ni->ni_mintxcredits = ni->ni_maxtxcredits;
1136 CDEBUG(D_LNI, "Added LNI %s [%d/%d/%d/%d]\n",
1137 libcfs_nid2str(ni->ni_nid),
1138 ni->ni_peertxcredits, ni->ni_txcredits,
1139 ni->ni_peerrtrcredits, ni->ni_peertimeout);
1144 if (the_lnet.ln_eqwaitni != NULL && nicount > 1) {
1145 lnd_type = the_lnet.ln_eqwaitni->ni_lnd->lnd_type;
1146 LCONSOLE_ERROR_MSG(0x109, "LND %s can only run single-network"
1148 libcfs_lnd2str(lnd_type));
1155 lnet_shutdown_lndnis();
1157 while (!cfs_list_empty(&nilist)) {
1158 ni = cfs_list_entry(nilist.next, lnet_ni_t, ni_list);
1159 cfs_list_del(&ni->ni_list);
1160 LIBCFS_FREE(ni, sizeof(*ni));
1167 * Initialize LNet library.
1169 * Only userspace program needs to call this function - it's automatically
1170 * called in the kernel at module loading time. Caller has to call LNetFini()
1171 * after a call to LNetInit(), if and only if the latter returned 0. It must
1172 * be called exactly once.
1174 * \return 0 on success, and -ve on failures.
1179 lnet_assert_wire_constants ();
1180 LASSERT (!the_lnet.ln_init);
1182 memset(&the_lnet, 0, sizeof(the_lnet));
1185 the_lnet.ln_refcount = 0;
1186 the_lnet.ln_init = 1;
1187 LNetInvalidateHandle(&the_lnet.ln_rc_eqh);
1188 CFS_INIT_LIST_HEAD(&the_lnet.ln_lnds);
1189 CFS_INIT_LIST_HEAD(&the_lnet.ln_zombie_rcd);
1192 /* All LNDs apart from the LOLND are in separate modules. They
1193 * register themselves when their module loads, and unregister
1194 * themselves when their module is unloaded. */
1197 * NB the order here determines default 'networks=' order */
1199 LNET_REGISTER_ULND(the_ptllnd);
1201 # ifdef HAVE_LIBPTHREAD
1202 LNET_REGISTER_ULND(the_tcplnd);
1205 lnet_register_lnd(&the_lolnd);
1210 * Finalize LNet library.
1212 * Only userspace program needs to call this function. It can be called
1215 * \pre LNetInit() called with success.
1216 * \pre All LNet users called LNetNIFini() for matching LNetNIInit() calls.
1221 LASSERT (the_lnet.ln_init);
1222 LASSERT (the_lnet.ln_refcount == 0);
1224 while (!cfs_list_empty(&the_lnet.ln_lnds))
1225 lnet_unregister_lnd(cfs_list_entry(the_lnet.ln_lnds.next,
1229 the_lnet.ln_init = 0;
1233 * Set LNet PID and start LNet interfaces, routing, and forwarding.
1235 * Userspace program should call this after a successful call to LNetInit().
1236 * Users must call this function at least once before any other functions.
1237 * For each successful call there must be a corresponding call to
1238 * LNetNIFini(). For subsequent calls to LNetNIInit(), \a requested_pid is
1241 * The PID used by LNet may be different from the one requested.
1244 * \param requested_pid PID requested by the caller.
1246 * \return 0 on success, and non-zero error code on failures.
1249 LNetNIInit(lnet_pid_t requested_pid)
1251 int im_a_router = 0;
1254 LNET_MUTEX_DOWN(&the_lnet.ln_api_mutex);
1256 LASSERT (the_lnet.ln_init);
1257 CDEBUG(D_OTHER, "refs %d\n", the_lnet.ln_refcount);
1259 if (the_lnet.ln_refcount > 0) {
1260 rc = the_lnet.ln_refcount++;
1264 lnet_get_tunables();
1266 if (requested_pid == LNET_PID_ANY) {
1267 /* Don't instantiate LNET just for me */
1272 rc = lnet_prepare(requested_pid);
1276 rc = lnet_startup_lndnis();
1280 rc = lnet_parse_routes(lnet_get_routes(), &im_a_router);
1284 rc = lnet_check_routes();
1288 rc = lnet_alloc_rtrpools(im_a_router);
1292 rc = lnet_acceptor_start();
1296 the_lnet.ln_refcount = 1;
1297 /* Now I may use my own API functions... */
1299 /* NB router checker needs the_lnet.ln_ping_info in
1300 * lnet_router_checker -> lnet_update_ni_status */
1301 rc = lnet_ping_target_init();
1305 rc = lnet_router_checker_start();
1313 lnet_ping_target_fini();
1315 the_lnet.ln_refcount = 0;
1316 lnet_acceptor_stop();
1318 lnet_destroy_routes();
1319 lnet_shutdown_lndnis();
1325 LNET_MUTEX_UP(&the_lnet.ln_api_mutex);
1330 * Stop LNet interfaces, routing, and forwarding.
1332 * Users must call this function once for each successful call to LNetNIInit().
1333 * Once the LNetNIFini() operation has been started, the results of pending
1334 * API operations are undefined.
1336 * \return always 0 for current implementation.
1341 LNET_MUTEX_DOWN(&the_lnet.ln_api_mutex);
1343 LASSERT (the_lnet.ln_init);
1344 LASSERT (the_lnet.ln_refcount > 0);
1346 if (the_lnet.ln_refcount != 1) {
1347 the_lnet.ln_refcount--;
1349 LASSERT (!the_lnet.ln_niinit_self);
1352 lnet_router_checker_stop();
1353 lnet_ping_target_fini();
1355 /* Teardown fns that use my own API functions BEFORE here */
1356 the_lnet.ln_refcount = 0;
1358 lnet_acceptor_stop();
1359 lnet_destroy_routes();
1360 lnet_shutdown_lndnis();
1364 LNET_MUTEX_UP(&the_lnet.ln_api_mutex);
1369 * This is an ugly hack to export IOC_LIBCFS_DEBUG_PEER and
1370 * IOC_LIBCFS_PORTALS_COMPATIBILITY commands to users, by tweaking the LNet
1371 * internal ioctl handler.
1373 * IOC_LIBCFS_PORTALS_COMPATIBILITY is now deprecated, don't use it.
1375 * \param cmd IOC_LIBCFS_DEBUG_PEER to print debugging data about a peer.
1376 * The data will be printed to system console. Don't use it excessively.
1377 * \param arg A pointer to lnet_process_id_t, process ID of the peer.
1379 * \return Always return 0 when called by users directly (i.e., not via ioctl).
1382 LNetCtl(unsigned int cmd, void *arg)
1384 struct libcfs_ioctl_data *data = arg;
1385 lnet_process_id_t id = {0};
1389 LASSERT (the_lnet.ln_init);
1390 LASSERT (the_lnet.ln_refcount > 0);
1393 case IOC_LIBCFS_GET_NI:
1394 rc = LNetGetId(data->ioc_count, &id);
1395 data->ioc_nid = id.nid;
1398 case IOC_LIBCFS_FAIL_NID:
1399 return lnet_fail_nid(data->ioc_nid, data->ioc_count);
1401 case IOC_LIBCFS_ADD_ROUTE:
1402 rc = lnet_add_route(data->ioc_net, data->ioc_count,
1404 return (rc != 0) ? rc : lnet_check_routes();
1406 case IOC_LIBCFS_DEL_ROUTE:
1407 return lnet_del_route(data->ioc_net, data->ioc_nid);
1409 case IOC_LIBCFS_GET_ROUTE:
1410 return lnet_get_route(data->ioc_count,
1411 &data->ioc_net, &data->ioc_count,
1412 &data->ioc_nid, &data->ioc_flags);
1413 case IOC_LIBCFS_NOTIFY_ROUTER:
1414 return lnet_notify(NULL, data->ioc_nid, data->ioc_flags,
1415 cfs_time_current() -
1416 cfs_time_seconds(cfs_time_current_sec() -
1417 (time_t)data->ioc_u64[0]));
1419 case IOC_LIBCFS_PORTALS_COMPATIBILITY:
1420 /* This can be removed once lustre stops calling it */
1423 case IOC_LIBCFS_LNET_DIST:
1424 rc = LNetDist(data->ioc_nid, &data->ioc_nid, &data->ioc_u32[1]);
1425 if (rc < 0 && rc != -EHOSTUNREACH)
1428 data->ioc_u32[0] = rc;
1431 case IOC_LIBCFS_TESTPROTOCOMPAT:
1433 the_lnet.ln_testprotocompat = data->ioc_flags;
1437 case IOC_LIBCFS_PING:
1438 id.nid = data->ioc_nid;
1439 id.pid = data->ioc_u32[0];
1440 rc = lnet_ping(id, data->ioc_u32[1], /* timeout */
1441 (lnet_process_id_t *)data->ioc_pbuf1,
1442 data->ioc_plen1/sizeof(lnet_process_id_t));
1445 data->ioc_count = rc;
1448 case IOC_LIBCFS_DEBUG_PEER: {
1449 /* CAVEAT EMPTOR: this one designed for calling directly; not
1451 id = *((lnet_process_id_t *) arg);
1453 lnet_debug_peer(id.nid);
1455 ni = lnet_net2ni(LNET_NIDNET(id.nid));
1457 CDEBUG(D_WARNING, "No NI for %s\n", libcfs_id2str(id));
1459 if (ni->ni_lnd->lnd_ctl == NULL) {
1460 CDEBUG(D_WARNING, "No ctl for %s\n",
1463 (void)ni->ni_lnd->lnd_ctl(ni, cmd, arg);
1472 ni = lnet_net2ni(data->ioc_net);
1476 if (ni->ni_lnd->lnd_ctl == NULL)
1479 rc = ni->ni_lnd->lnd_ctl(ni, cmd, arg);
1488 * Retrieve the lnet_process_id_t ID of LNet interface at \a index. Note that
1489 * all interfaces share a same PID, as requested by LNetNIInit().
1491 * \param index Index of the interface to look up.
1492 * \param id On successful return, this location will hold the
1493 * lnet_process_id_t ID of the interface.
1495 * \retval 0 If an interface exists at \a index.
1496 * \retval -ENOENT If no interface has been found.
1499 LNetGetId(unsigned int index, lnet_process_id_t *id)
1505 LASSERT (the_lnet.ln_init);
1506 LASSERT (the_lnet.ln_refcount > 0);
1510 cfs_list_for_each(tmp, &the_lnet.ln_nis) {
1514 ni = cfs_list_entry(tmp, lnet_ni_t, ni_list);
1516 id->nid = ni->ni_nid;
1517 id->pid = the_lnet.ln_pid;
1528 * Print a string representation of handle \a h into buffer \a str of
1532 LNetSnprintHandle(char *str, int len, lnet_handle_any_t h)
1534 snprintf(str, len, LPX64, h.cookie);
1538 lnet_create_ping_info(void)
1543 unsigned int infosz;
1545 lnet_process_id_t id;
1546 lnet_ping_info_t *pinfo;
1548 for (n = 0; ; n++) {
1549 rc = LNetGetId(n, &id);
1556 infosz = offsetof(lnet_ping_info_t, pi_ni[n]);
1557 LIBCFS_ALLOC(pinfo, infosz);
1558 if (pinfo == NULL) {
1559 CERROR("Can't allocate ping info[%d]\n", n);
1564 pinfo->pi_pid = the_lnet.ln_pid;
1565 pinfo->pi_magic = LNET_PROTO_PING_MAGIC;
1566 pinfo->pi_version = LNET_PROTO_PING_VERSION;
1568 for (i = 0; i < n; i++) {
1569 lnet_ni_status_t *ns = &pinfo->pi_ni[i];
1571 rc = LNetGetId(i, &id);
1574 ns->ns_nid = id.nid;
1575 ns->ns_status = LNET_NI_STATUS_UP;
1579 ni = lnet_nid2ni_locked(id.nid);
1580 LASSERT (ni != NULL);
1581 LASSERT (ni->ni_status == NULL);
1583 lnet_ni_decref_locked(ni);
1588 the_lnet.ln_ping_info = pinfo;
1593 lnet_destroy_ping_info(void)
1599 cfs_list_for_each_entry (ni, &the_lnet.ln_nis, ni_list) {
1600 ni->ni_status = NULL;
1605 LIBCFS_FREE(the_lnet.ln_ping_info,
1606 offsetof(lnet_ping_info_t,
1607 pi_ni[the_lnet.ln_ping_info->pi_nnis]));
1608 the_lnet.ln_ping_info = NULL;
1613 lnet_ping_target_init(void)
1616 lnet_handle_me_t meh;
1617 lnet_process_id_t id;
1622 rc = lnet_create_ping_info();
1626 /* We can have a tiny EQ since we only need to see the unlink event on
1627 * teardown, which by definition is the last one! */
1628 rc = LNetEQAlloc(2, LNET_EQ_HANDLER_NONE, &the_lnet.ln_ping_target_eq);
1630 CERROR("Can't allocate ping EQ: %d\n", rc);
1634 memset(&id, 0, sizeof(lnet_process_id_t));
1635 id.nid = LNET_NID_ANY;
1636 id.pid = LNET_PID_ANY;
1638 rc = LNetMEAttach(LNET_RESERVED_PORTAL, id,
1639 LNET_PROTO_PING_MATCHBITS, 0,
1640 LNET_UNLINK, LNET_INS_AFTER,
1643 CERROR("Can't create ping ME: %d\n", rc);
1647 /* initialize md content */
1648 infosz = offsetof(lnet_ping_info_t,
1649 pi_ni[the_lnet.ln_ping_info->pi_nnis]);
1650 md.start = the_lnet.ln_ping_info;
1652 md.threshold = LNET_MD_THRESH_INF;
1654 md.options = LNET_MD_OP_GET | LNET_MD_TRUNCATE |
1655 LNET_MD_MANAGE_REMOTE;
1657 md.eq_handle = the_lnet.ln_ping_target_eq;
1659 rc = LNetMDAttach(meh, md,
1661 &the_lnet.ln_ping_target_md);
1663 CERROR("Can't attach ping MD: %d\n", rc);
1670 rc2 = LNetMEUnlink(meh);
1673 rc2 = LNetEQFree(the_lnet.ln_ping_target_eq);
1676 lnet_destroy_ping_info();
1681 lnet_ping_target_fini(void)
1686 int timeout_ms = 1000;
1687 cfs_sigset_t blocked = cfs_block_allsigs();
1689 LNetMDUnlink(the_lnet.ln_ping_target_md);
1690 /* NB md could be busy; this just starts the unlink */
1693 rc = LNetEQPoll(&the_lnet.ln_ping_target_eq, 1,
1694 timeout_ms, &event, &which);
1696 /* I expect overflow... */
1697 LASSERT (rc >= 0 || rc == -EOVERFLOW);
1700 /* timed out: provide a diagnostic */
1701 CWARN("Still waiting for ping MD to unlink\n");
1706 /* Got a valid event */
1711 rc = LNetEQFree(the_lnet.ln_ping_target_eq);
1713 lnet_destroy_ping_info();
1714 cfs_restore_sigs(blocked);
1718 lnet_ping (lnet_process_id_t id, int timeout_ms, lnet_process_id_t *ids, int n_ids)
1720 lnet_handle_eq_t eqh;
1721 lnet_handle_md_t mdh;
1727 const int a_long_time = 60000; /* mS */
1728 int infosz = offsetof(lnet_ping_info_t, pi_ni[n_ids]);
1729 lnet_ping_info_t *info;
1730 lnet_process_id_t tmpid;
1735 cfs_sigset_t blocked;
1738 id.nid == LNET_NID_ANY ||
1739 timeout_ms > 500000 || /* arbitrary limit! */
1740 n_ids > 20) /* arbitrary limit! */
1743 if (id.pid == LNET_PID_ANY)
1744 id.pid = LUSTRE_SRV_LNET_PID;
1746 LIBCFS_ALLOC(info, infosz);
1750 /* NB 2 events max (including any unlink event) */
1751 rc = LNetEQAlloc(2, LNET_EQ_HANDLER_NONE, &eqh);
1753 CERROR("Can't allocate EQ: %d\n", rc);
1757 /* initialize md content */
1760 md.threshold = 2; /*GET/REPLY*/
1762 md.options = LNET_MD_TRUNCATE;
1766 rc = LNetMDBind(md, LNET_UNLINK, &mdh);
1768 CERROR("Can't bind MD: %d\n", rc);
1772 rc = LNetGet(LNET_NID_ANY, mdh, id,
1773 LNET_RESERVED_PORTAL,
1774 LNET_PROTO_PING_MATCHBITS, 0);
1777 /* Don't CERROR; this could be deliberate! */
1779 rc2 = LNetMDUnlink(mdh);
1782 /* NB must wait for the UNLINK event below... */
1784 timeout_ms = a_long_time;
1788 /* MUST block for unlink to complete */
1790 blocked = cfs_block_allsigs();
1792 rc2 = LNetEQPoll(&eqh, 1, timeout_ms, &event, &which);
1795 cfs_restore_sigs(blocked);
1797 CDEBUG(D_NET, "poll %d(%d %d)%s\n", rc2,
1798 (rc2 <= 0) ? -1 : event.type,
1799 (rc2 <= 0) ? -1 : event.status,
1800 (rc2 > 0 && event.unlinked) ? " unlinked" : "");
1802 LASSERT (rc2 != -EOVERFLOW); /* can't miss anything */
1804 if (rc2 <= 0 || event.status != 0) {
1805 /* timeout or error */
1806 if (!replied && rc == 0)
1807 rc = (rc2 < 0) ? rc2 :
1808 (rc2 == 0) ? -ETIMEDOUT :
1812 /* Ensure completion in finite time... */
1814 /* No assertion (racing with network) */
1816 timeout_ms = a_long_time;
1817 } else if (rc2 == 0) {
1818 /* timed out waiting for unlink */
1819 CWARN("ping %s: late network completion\n",
1822 } else if (event.type == LNET_EVENT_REPLY) {
1827 } while (rc2 <= 0 || !event.unlinked);
1831 CWARN("%s: Unexpected rc >= 0 but no reply!\n",
1838 LASSERT (nob >= 0 && nob <= infosz);
1840 rc = -EPROTO; /* if I can't parse... */
1843 /* can't check magic/version */
1844 CERROR("%s: ping info too short %d\n",
1845 libcfs_id2str(id), nob);
1849 if (info->pi_magic == __swab32(LNET_PROTO_PING_MAGIC)) {
1850 lnet_swap_pinginfo(info);
1851 } else if (info->pi_magic != LNET_PROTO_PING_MAGIC) {
1852 CERROR("%s: Unexpected magic %08x\n",
1853 libcfs_id2str(id), info->pi_magic);
1857 if (info->pi_version != LNET_PROTO_PING_VERSION) {
1858 CERROR("%s: Unexpected version 0x%x\n",
1859 libcfs_id2str(id), info->pi_version);
1863 if (nob < offsetof(lnet_ping_info_t, pi_ni[0])) {
1864 CERROR("%s: Short reply %d(%d min)\n", libcfs_id2str(id),
1865 nob, (int)offsetof(lnet_ping_info_t, pi_ni[0]));
1869 if (info->pi_nnis < n_ids)
1870 n_ids = info->pi_nnis;
1872 if (nob < offsetof(lnet_ping_info_t, pi_ni[n_ids])) {
1873 CERROR("%s: Short reply %d(%d expected)\n", libcfs_id2str(id),
1874 nob, (int)offsetof(lnet_ping_info_t, pi_ni[n_ids]));
1878 rc = -EFAULT; /* If I SEGV... */
1880 for (i = 0; i < n_ids; i++) {
1881 tmpid.pid = info->pi_pid;
1882 tmpid.nid = info->pi_ni[i].ns_nid;
1884 if (cfs_copy_to_user(&ids[i], &tmpid, sizeof(tmpid)))
1893 rc2 = LNetEQFree(eqh);
1895 CERROR("rc2 %d\n", rc2);
1899 LIBCFS_FREE(info, infosz);