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, Whamcloud, Inc.
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_mutex_init(&the_lnet.ln_lnd_mutex);
97 cfs_mutex_init(&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;
140 SET_BUT_UNUSED(ip2nets);
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_LOCK(&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_UNLOCK(&the_lnet.ln_lnd_mutex);
337 lnet_unregister_lnd (lnd_t *lnd)
339 LNET_MUTEX_LOCK(&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_UNLOCK(&the_lnet.ln_lnd_mutex);
351 #ifdef LNET_USE_LIB_FREELIST
354 lnet_freelist_init (lnet_freelist_t *fl, int n, int size)
360 size += offsetof (lnet_freeobj_t, fo_contents);
362 LIBCFS_ALLOC(space, n * size);
366 CFS_INIT_LIST_HEAD (&fl->fl_list);
369 fl->fl_objsize = size;
373 memset (space, 0, size);
374 cfs_list_add ((cfs_list_t *)space, &fl->fl_list);
382 lnet_freelist_fini (lnet_freelist_t *fl)
387 if (fl->fl_nobjs == 0)
391 for (el = fl->fl_list.next; el != &fl->fl_list; el = el->next)
394 LASSERT (count == fl->fl_nobjs);
396 LIBCFS_FREE(fl->fl_objs, fl->fl_nobjs * fl->fl_objsize);
397 memset (fl, 0, sizeof (*fl));
400 #endif /* LNET_USE_LIB_FREELIST */
403 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. */
412 int rc = gettimeofday (&tv, NULL);
415 cfs_gettimeofday(&tv);
419 cookie += tv.tv_usec;
424 lnet_res_type2str(int type)
429 case LNET_COOKIE_TYPE_MD:
431 case LNET_COOKIE_TYPE_ME:
433 case LNET_COOKIE_TYPE_EQ:
439 lnet_res_container_cleanup(struct lnet_res_container *rec)
443 if (rec->rec_type == 0) /* not set yet, it's a uninitialized */
446 while (!cfs_list_empty(&rec->rec_active)) {
447 cfs_list_t *e = rec->rec_active.next;
449 cfs_list_del_init(e);
450 if (rec->rec_type == LNET_COOKIE_TYPE_EQ) {
451 lnet_eq_free(cfs_list_entry(e, lnet_eq_t, eq_list));
453 } else if (rec->rec_type == LNET_COOKIE_TYPE_MD) {
454 lnet_md_free(cfs_list_entry(e, lnet_libmd_t, md_list));
456 } else { /* NB: Active MEs should be attached on portals */
463 /* Found alive MD/ME/EQ, user really should unlink/free
464 * all of them before finalize LNet, but if someone didn't,
465 * we have to recycle garbage for him */
466 CERROR("%d active elements on exit of %s container\n",
467 count, lnet_res_type2str(rec->rec_type));
470 #ifdef LNET_USE_LIB_FREELIST
471 lnet_freelist_fini(&rec->rec_freelist);
473 if (rec->rec_lh_hash != NULL) {
474 LIBCFS_FREE(rec->rec_lh_hash,
475 LNET_LH_HASH_SIZE * sizeof(rec->rec_lh_hash[0]));
476 rec->rec_lh_hash = NULL;
479 rec->rec_type = 0; /* mark it as finalized */
483 lnet_res_container_setup(struct lnet_res_container *rec,
484 int type, int objnum, int objsz)
489 LASSERT(rec->rec_type == 0);
491 rec->rec_type = type;
492 CFS_INIT_LIST_HEAD(&rec->rec_active);
494 #ifdef LNET_USE_LIB_FREELIST
495 memset(&rec->rec_freelist, 0, sizeof(rec->rec_freelist));
496 rc = lnet_freelist_init(&rec->rec_freelist, objnum, objsz);
500 rec->rec_lh_cookie = type;
502 /* Arbitrary choice of hash table size */
503 LIBCFS_ALLOC(rec->rec_lh_hash,
504 LNET_LH_HASH_SIZE * sizeof(rec->rec_lh_hash[0]));
505 if (rec->rec_lh_hash == NULL) {
510 for (i = 0; i < LNET_LH_HASH_SIZE; i++)
511 CFS_INIT_LIST_HEAD(&rec->rec_lh_hash[i]);
516 CERROR("Failed to setup %s resource container\n",
517 lnet_res_type2str(type));
518 lnet_res_container_cleanup(rec);
523 lnet_res_lh_lookup(struct lnet_res_container *rec, __u64 cookie)
525 /* ALWAYS called with lnet_res_lock held */
527 lnet_libhandle_t *lh;
530 if ((cookie & (LNET_COOKIE_TYPES - 1)) != rec->rec_type)
533 hash = cookie >> LNET_COOKIE_TYPE_BITS;
534 head = &rec->rec_lh_hash[hash & LNET_LH_HASH_MASK];
536 cfs_list_for_each_entry(lh, head, lh_hash_chain) {
537 if (lh->lh_cookie == cookie)
545 lnet_res_lh_initialize(struct lnet_res_container *rec, lnet_libhandle_t *lh)
547 /* ALWAYS called with lnet_res_lock held */
548 unsigned int ibits = LNET_COOKIE_TYPE_BITS;
551 lh->lh_cookie = rec->rec_lh_cookie;
552 rec->rec_lh_cookie += 1 << ibits;
554 hash = (lh->lh_cookie >> ibits) & LNET_LH_HASH_MASK;
556 cfs_list_add(&lh->lh_hash_chain, &rec->rec_lh_hash[hash]);
560 lnet_portal_mhash_alloc(void)
565 LIBCFS_ALLOC(mhash, sizeof(cfs_list_t) * LNET_PORTAL_HASH_SIZE);
569 for (i = 0; i < LNET_PORTAL_HASH_SIZE; i++)
570 CFS_INIT_LIST_HEAD(&mhash[i]);
576 lnet_portal_mhash_free(cfs_list_t *mhash)
580 for (i = 0; i < LNET_PORTAL_HASH_SIZE; i++) {
581 while (!cfs_list_empty(&mhash[i])) {
582 lnet_me_t *me = cfs_list_entry(mhash[i].next,
584 CERROR ("Active ME %p on exit portal mhash\n", me);
585 cfs_list_del(&me->me_list);
589 LIBCFS_FREE(mhash, sizeof(cfs_list_t) * LNET_PORTAL_HASH_SIZE);
594 * Reserved API - do not use.
595 * Temporary workaround to allow uOSS and test programs force server
596 * mode in userspace. See comments near ln_server_mode_flag in
597 * lnet/lib-types.h */
601 the_lnet.ln_server_mode_flag = 1;
606 lnet_prepare(lnet_pid_t requested_pid)
608 /* Prepare to bring up the network */
612 LASSERT (the_lnet.ln_refcount == 0);
614 the_lnet.ln_routing = 0;
617 LASSERT ((requested_pid & LNET_PID_USERFLAG) == 0);
618 the_lnet.ln_pid = requested_pid;
620 if (the_lnet.ln_server_mode_flag) {/* server case (uOSS) */
621 LASSERT ((requested_pid & LNET_PID_USERFLAG) == 0);
623 if (cfs_curproc_uid())/* Only root can run user-space server */
625 the_lnet.ln_pid = requested_pid;
627 } else {/* client case (liblustre) */
629 /* My PID must be unique on this node and flag I'm userspace */
630 the_lnet.ln_pid = getpid() | LNET_PID_USERFLAG;
634 memset(&the_lnet.ln_counters, 0,
635 sizeof(the_lnet.ln_counters));
637 CFS_INIT_LIST_HEAD (&the_lnet.ln_test_peers);
638 CFS_INIT_LIST_HEAD (&the_lnet.ln_nis);
639 CFS_INIT_LIST_HEAD (&the_lnet.ln_zombie_nis);
640 CFS_INIT_LIST_HEAD (&the_lnet.ln_remote_nets);
641 CFS_INIT_LIST_HEAD (&the_lnet.ln_routers);
643 the_lnet.ln_interface_cookie = lnet_create_interface_cookie();
645 lnet_init_rtrpools();
647 rc = lnet_create_peer_table();
651 /* NB: we will have instance of message container per CPT soon */
652 rc = lnet_msg_container_setup(&the_lnet.ln_msg_container);
656 rc = lnet_res_container_setup(&the_lnet.ln_eq_container,
657 LNET_COOKIE_TYPE_EQ, LNET_FL_MAX_EQS,
660 CERROR("Failed to create EQ container for LNet: %d\n", rc);
664 /* NB: we will have instance of ME container per CPT soon */
665 rc = lnet_res_container_setup(&the_lnet.ln_me_container,
666 LNET_COOKIE_TYPE_ME, LNET_FL_MAX_MES,
669 CERROR("Failed to create ME container for LNet: %d\n", rc);
673 /* NB: we will have instance of MD container per CPT soon */
674 rc = lnet_res_container_setup(&the_lnet.ln_md_container,
675 LNET_COOKIE_TYPE_MD, LNET_FL_MAX_MDS,
676 sizeof(lnet_libmd_t));
678 CERROR("Failed to create MD container for LNet: %d\n", rc);
682 the_lnet.ln_nportals = MAX_PORTALS;
683 LIBCFS_ALLOC(the_lnet.ln_portals,
684 the_lnet.ln_nportals *
685 sizeof(*the_lnet.ln_portals));
686 if (the_lnet.ln_portals == NULL) {
691 for (i = 0; i < the_lnet.ln_nportals; i++) {
692 CFS_INIT_LIST_HEAD(&(the_lnet.ln_portals[i].ptl_mlist));
693 CFS_INIT_LIST_HEAD(&(the_lnet.ln_portals[i].ptl_msgq));
694 the_lnet.ln_portals[i].ptl_options = 0;
700 /* NB: lnet_res_container_cleanup is safe to call for
701 * uninitialized container */
702 lnet_res_container_cleanup(&the_lnet.ln_md_container);
703 lnet_res_container_cleanup(&the_lnet.ln_me_container);
704 lnet_res_container_cleanup(&the_lnet.ln_eq_container);
706 lnet_msg_container_cleanup(&the_lnet.ln_msg_container);
708 lnet_destroy_peer_table();
714 lnet_unprepare (void)
718 /* NB no LNET_LOCK since this is the last reference. All LND instances
719 * have shut down already, so it is safe to unlink and free all
720 * descriptors, even those that appear committed to a network op (eg MD
721 * with non-zero pending count) */
723 lnet_fail_nid(LNET_NID_ANY, 0);
725 LASSERT (cfs_list_empty(&the_lnet.ln_test_peers));
726 LASSERT (the_lnet.ln_refcount == 0);
727 LASSERT (cfs_list_empty(&the_lnet.ln_nis));
728 LASSERT (cfs_list_empty(&the_lnet.ln_zombie_nis));
729 LASSERT (the_lnet.ln_nzombie_nis == 0);
731 for (idx = 0; idx < the_lnet.ln_nportals; idx++) {
732 lnet_portal_t *ptl = &the_lnet.ln_portals[idx];
734 LASSERT (cfs_list_empty(&ptl->ptl_msgq));
736 while (!cfs_list_empty(&ptl->ptl_mlist)) {
737 lnet_me_t *me = cfs_list_entry(ptl->ptl_mlist.next,
739 CERROR ("Active ME %p on exit\n", me);
740 cfs_list_del (&me->me_list);
744 if (ptl->ptl_mhash != NULL) {
745 LASSERT (lnet_portal_is_unique(ptl));
746 lnet_portal_mhash_free(ptl->ptl_mhash);
750 lnet_res_container_cleanup(&the_lnet.ln_md_container);
751 lnet_res_container_cleanup(&the_lnet.ln_me_container);
752 lnet_res_container_cleanup(&the_lnet.ln_eq_container);
754 LIBCFS_FREE(the_lnet.ln_portals,
755 the_lnet.ln_nportals * sizeof(*the_lnet.ln_portals));
757 lnet_free_rtrpools();
758 lnet_msg_container_cleanup(&the_lnet.ln_msg_container);
759 lnet_destroy_peer_table();
765 lnet_net2ni_locked (__u32 net)
770 cfs_list_for_each (tmp, &the_lnet.ln_nis) {
771 ni = cfs_list_entry(tmp, lnet_ni_t, ni_list);
773 if (LNET_NIDNET(ni->ni_nid) == net) {
774 lnet_ni_addref_locked(ni);
783 lnet_islocalnet (__u32 net)
788 ni = lnet_net2ni_locked(net);
790 lnet_ni_decref_locked(ni);
797 lnet_nid2ni_locked (lnet_nid_t nid)
802 cfs_list_for_each (tmp, &the_lnet.ln_nis) {
803 ni = cfs_list_entry(tmp, lnet_ni_t, ni_list);
805 if (ni->ni_nid == nid) {
806 lnet_ni_addref_locked(ni);
815 lnet_islocalnid (lnet_nid_t nid)
820 ni = lnet_nid2ni_locked(nid);
822 lnet_ni_decref_locked(ni);
829 lnet_count_acceptor_nis (void)
831 /* Return the # of NIs that need the acceptor. */
833 #if defined(__KERNEL__) || defined(HAVE_LIBPTHREAD)
838 cfs_list_for_each (tmp, &the_lnet.ln_nis) {
839 ni = cfs_list_entry(tmp, lnet_ni_t, ni_list);
841 if (ni->ni_lnd->lnd_accept != NULL)
847 #endif /* defined(__KERNEL__) || defined(HAVE_LIBPTHREAD) */
852 lnet_shutdown_lndnis (void)
858 /* NB called holding the global mutex */
860 /* All quiet on the API front */
861 LASSERT (!the_lnet.ln_shutdown);
862 LASSERT (the_lnet.ln_refcount == 0);
863 LASSERT (cfs_list_empty(&the_lnet.ln_zombie_nis));
864 LASSERT (the_lnet.ln_nzombie_nis == 0);
865 LASSERT (cfs_list_empty(&the_lnet.ln_remote_nets));
868 the_lnet.ln_shutdown = 1; /* flag shutdown */
870 /* Unlink NIs from the global table */
871 while (!cfs_list_empty(&the_lnet.ln_nis)) {
872 ni = cfs_list_entry(the_lnet.ln_nis.next,
874 cfs_list_del (&ni->ni_list);
876 the_lnet.ln_nzombie_nis++;
877 lnet_ni_decref_locked(ni); /* drop ln_nis' ref */
880 /* Drop the cached eqwait NI. */
881 if (the_lnet.ln_eqwaitni != NULL) {
882 lnet_ni_decref_locked(the_lnet.ln_eqwaitni);
883 the_lnet.ln_eqwaitni = NULL;
886 /* Drop the cached loopback NI. */
887 if (the_lnet.ln_loni != NULL) {
888 lnet_ni_decref_locked(the_lnet.ln_loni);
889 the_lnet.ln_loni = NULL;
894 /* Clear lazy portals and drop delayed messages which hold refs
895 * on their lnet_msg_t::msg_rxpeer */
896 for (i = 0; i < the_lnet.ln_nportals; i++)
897 LNetClearLazyPortal(i);
899 /* Clear the peer table and wait for all peers to go (they hold refs on
901 lnet_clear_peer_table();
904 /* Now wait for the NI's I just nuked to show up on ln_zombie_nis
905 * and shut them down in guaranteed thread context */
907 while (the_lnet.ln_nzombie_nis != 0) {
909 while (cfs_list_empty(&the_lnet.ln_zombie_nis)) {
913 CDEBUG(D_WARNING,"Waiting for %d zombie NIs\n",
914 the_lnet.ln_nzombie_nis);
915 cfs_pause(cfs_time_seconds(1));
919 ni = cfs_list_entry(the_lnet.ln_zombie_nis.next,
921 cfs_list_del(&ni->ni_list);
922 ni->ni_lnd->lnd_refcount--;
926 islo = ni->ni_lnd->lnd_type == LOLND;
928 LASSERT (!cfs_in_interrupt ());
929 (ni->ni_lnd->lnd_shutdown)(ni);
931 /* can't deref lnd anymore now; it might have unregistered
935 CDEBUG(D_LNI, "Removed LNI %s\n",
936 libcfs_nid2str(ni->ni_nid));
938 LIBCFS_FREE(ni, sizeof(*ni));
941 the_lnet.ln_nzombie_nis--;
944 the_lnet.ln_shutdown = 0;
947 if (the_lnet.ln_network_tokens != NULL) {
948 LIBCFS_FREE(the_lnet.ln_network_tokens,
949 the_lnet.ln_network_tokens_nob);
950 the_lnet.ln_network_tokens = NULL;
955 lnet_startup_lndnis (void)
963 char *nets = lnet_get_networks();
965 CFS_INIT_LIST_HEAD(&nilist);
970 rc = lnet_parse_networks(&nilist, nets);
974 while (!cfs_list_empty(&nilist)) {
975 ni = cfs_list_entry(nilist.next, lnet_ni_t, ni_list);
976 lnd_type = LNET_NETTYP(LNET_NIDNET(ni->ni_nid));
978 LASSERT (libcfs_isknown_lnd(lnd_type));
980 if (lnd_type == CIBLND ||
981 lnd_type == OPENIBLND ||
982 lnd_type == IIBLND ||
983 lnd_type == VIBLND) {
984 CERROR("LND %s obsoleted\n",
985 libcfs_lnd2str(lnd_type));
989 LNET_MUTEX_LOCK(&the_lnet.ln_lnd_mutex);
990 lnd = lnet_find_lnd_by_type(lnd_type);
994 LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
995 rc = cfs_request_module("%s",
996 libcfs_lnd2modname(lnd_type));
997 LNET_MUTEX_LOCK(&the_lnet.ln_lnd_mutex);
999 lnd = lnet_find_lnd_by_type(lnd_type);
1001 LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
1002 CERROR("Can't load LND %s, module %s, rc=%d\n",
1003 libcfs_lnd2str(lnd_type),
1004 libcfs_lnd2modname(lnd_type), rc);
1005 #ifndef HAVE_MODULE_LOADING_SUPPORT
1006 LCONSOLE_ERROR_MSG(0x104, "Your kernel must be "
1007 "compiled with kernel module "
1008 "loading support.");
1015 LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
1016 CERROR("LND %s not supported\n",
1017 libcfs_lnd2str(lnd_type));
1022 ni->ni_refcount = 1;
1025 lnd->lnd_refcount++;
1030 rc = (lnd->lnd_startup)(ni);
1032 LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
1035 LCONSOLE_ERROR_MSG(0x105, "Error %d starting up LNI %s"
1037 rc, libcfs_lnd2str(lnd->lnd_type));
1039 lnd->lnd_refcount--;
1044 LASSERT (ni->ni_peertimeout <= 0 || lnd->lnd_query != NULL);
1046 cfs_list_del(&ni->ni_list);
1049 cfs_list_add_tail(&ni->ni_list, &the_lnet.ln_nis);
1052 if (lnd->lnd_type == LOLND) {
1054 LASSERT (the_lnet.ln_loni == NULL);
1055 the_lnet.ln_loni = ni;
1060 if (lnd->lnd_wait != NULL) {
1061 if (the_lnet.ln_eqwaitni == NULL) {
1063 the_lnet.ln_eqwaitni = ni;
1066 # ifndef HAVE_LIBPTHREAD
1067 LCONSOLE_ERROR_MSG(0x106, "LND %s not supported in a "
1068 "single-threaded runtime\n",
1069 libcfs_lnd2str(lnd_type));
1074 if (ni->ni_peertxcredits == 0 ||
1075 ni->ni_maxtxcredits == 0) {
1076 LCONSOLE_ERROR_MSG(0x107, "LNI %s has no %scredits\n",
1077 libcfs_lnd2str(lnd->lnd_type),
1078 ni->ni_peertxcredits == 0 ?
1083 ni->ni_txcredits = ni->ni_mintxcredits = ni->ni_maxtxcredits;
1085 CDEBUG(D_LNI, "Added LNI %s [%d/%d/%d/%d]\n",
1086 libcfs_nid2str(ni->ni_nid),
1087 ni->ni_peertxcredits, ni->ni_txcredits,
1088 ni->ni_peerrtrcredits, ni->ni_peertimeout);
1093 if (the_lnet.ln_eqwaitni != NULL && nicount > 1) {
1094 lnd_type = the_lnet.ln_eqwaitni->ni_lnd->lnd_type;
1095 LCONSOLE_ERROR_MSG(0x109, "LND %s can only run single-network"
1097 libcfs_lnd2str(lnd_type));
1104 lnet_shutdown_lndnis();
1106 while (!cfs_list_empty(&nilist)) {
1107 ni = cfs_list_entry(nilist.next, lnet_ni_t, ni_list);
1108 cfs_list_del(&ni->ni_list);
1109 LIBCFS_FREE(ni, sizeof(*ni));
1116 * Initialize LNet library.
1118 * Only userspace program needs to call this function - it's automatically
1119 * called in the kernel at module loading time. Caller has to call LNetFini()
1120 * after a call to LNetInit(), if and only if the latter returned 0. It must
1121 * be called exactly once.
1123 * \return 0 on success, and -ve on failures.
1128 lnet_assert_wire_constants ();
1129 LASSERT (!the_lnet.ln_init);
1131 memset(&the_lnet, 0, sizeof(the_lnet));
1134 the_lnet.ln_refcount = 0;
1135 the_lnet.ln_init = 1;
1136 LNetInvalidateHandle(&the_lnet.ln_rc_eqh);
1137 CFS_INIT_LIST_HEAD(&the_lnet.ln_lnds);
1138 CFS_INIT_LIST_HEAD(&the_lnet.ln_zombie_rcd);
1141 /* All LNDs apart from the LOLND are in separate modules. They
1142 * register themselves when their module loads, and unregister
1143 * themselves when their module is unloaded. */
1146 * NB the order here determines default 'networks=' order */
1148 LNET_REGISTER_ULND(the_ptllnd);
1150 # ifdef HAVE_LIBPTHREAD
1151 LNET_REGISTER_ULND(the_tcplnd);
1154 lnet_register_lnd(&the_lolnd);
1159 * Finalize LNet library.
1161 * Only userspace program needs to call this function. It can be called
1164 * \pre LNetInit() called with success.
1165 * \pre All LNet users called LNetNIFini() for matching LNetNIInit() calls.
1170 LASSERT (the_lnet.ln_init);
1171 LASSERT (the_lnet.ln_refcount == 0);
1173 while (!cfs_list_empty(&the_lnet.ln_lnds))
1174 lnet_unregister_lnd(cfs_list_entry(the_lnet.ln_lnds.next,
1178 the_lnet.ln_init = 0;
1182 * Set LNet PID and start LNet interfaces, routing, and forwarding.
1184 * Userspace program should call this after a successful call to LNetInit().
1185 * Users must call this function at least once before any other functions.
1186 * For each successful call there must be a corresponding call to
1187 * LNetNIFini(). For subsequent calls to LNetNIInit(), \a requested_pid is
1190 * The PID used by LNet may be different from the one requested.
1193 * \param requested_pid PID requested by the caller.
1195 * \return >= 0 on success, and < 0 error code on failures.
1198 LNetNIInit(lnet_pid_t requested_pid)
1200 int im_a_router = 0;
1203 LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
1205 LASSERT (the_lnet.ln_init);
1206 CDEBUG(D_OTHER, "refs %d\n", the_lnet.ln_refcount);
1208 if (the_lnet.ln_refcount > 0) {
1209 rc = the_lnet.ln_refcount++;
1213 lnet_get_tunables();
1215 if (requested_pid == LNET_PID_ANY) {
1216 /* Don't instantiate LNET just for me */
1221 rc = lnet_prepare(requested_pid);
1225 rc = lnet_startup_lndnis();
1229 rc = lnet_parse_routes(lnet_get_routes(), &im_a_router);
1233 rc = lnet_check_routes();
1237 rc = lnet_alloc_rtrpools(im_a_router);
1241 rc = lnet_acceptor_start();
1245 the_lnet.ln_refcount = 1;
1246 /* Now I may use my own API functions... */
1248 /* NB router checker needs the_lnet.ln_ping_info in
1249 * lnet_router_checker -> lnet_update_ni_status */
1250 rc = lnet_ping_target_init();
1254 rc = lnet_router_checker_start();
1262 lnet_ping_target_fini();
1264 the_lnet.ln_refcount = 0;
1265 lnet_acceptor_stop();
1267 lnet_destroy_routes();
1268 lnet_shutdown_lndnis();
1274 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
1279 * Stop LNet interfaces, routing, and forwarding.
1281 * Users must call this function once for each successful call to LNetNIInit().
1282 * Once the LNetNIFini() operation has been started, the results of pending
1283 * API operations are undefined.
1285 * \return always 0 for current implementation.
1290 LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
1292 LASSERT (the_lnet.ln_init);
1293 LASSERT (the_lnet.ln_refcount > 0);
1295 if (the_lnet.ln_refcount != 1) {
1296 the_lnet.ln_refcount--;
1298 LASSERT (!the_lnet.ln_niinit_self);
1301 lnet_router_checker_stop();
1302 lnet_ping_target_fini();
1304 /* Teardown fns that use my own API functions BEFORE here */
1305 the_lnet.ln_refcount = 0;
1307 lnet_acceptor_stop();
1308 lnet_destroy_routes();
1309 lnet_shutdown_lndnis();
1313 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
1318 * This is an ugly hack to export IOC_LIBCFS_DEBUG_PEER and
1319 * IOC_LIBCFS_PORTALS_COMPATIBILITY commands to users, by tweaking the LNet
1320 * internal ioctl handler.
1322 * IOC_LIBCFS_PORTALS_COMPATIBILITY is now deprecated, don't use it.
1324 * \param cmd IOC_LIBCFS_DEBUG_PEER to print debugging data about a peer.
1325 * The data will be printed to system console. Don't use it excessively.
1326 * \param arg A pointer to lnet_process_id_t, process ID of the peer.
1328 * \return Always return 0 when called by users directly (i.e., not via ioctl).
1331 LNetCtl(unsigned int cmd, void *arg)
1333 struct libcfs_ioctl_data *data = arg;
1334 lnet_process_id_t id = {0};
1338 LASSERT (the_lnet.ln_init);
1339 LASSERT (the_lnet.ln_refcount > 0);
1342 case IOC_LIBCFS_GET_NI:
1343 rc = LNetGetId(data->ioc_count, &id);
1344 data->ioc_nid = id.nid;
1347 case IOC_LIBCFS_FAIL_NID:
1348 return lnet_fail_nid(data->ioc_nid, data->ioc_count);
1350 case IOC_LIBCFS_ADD_ROUTE:
1351 rc = lnet_add_route(data->ioc_net, data->ioc_count,
1353 return (rc != 0) ? rc : lnet_check_routes();
1355 case IOC_LIBCFS_DEL_ROUTE:
1356 return lnet_del_route(data->ioc_net, data->ioc_nid);
1358 case IOC_LIBCFS_GET_ROUTE:
1359 return lnet_get_route(data->ioc_count,
1360 &data->ioc_net, &data->ioc_count,
1361 &data->ioc_nid, &data->ioc_flags);
1362 case IOC_LIBCFS_NOTIFY_ROUTER:
1363 return lnet_notify(NULL, data->ioc_nid, data->ioc_flags,
1364 cfs_time_current() -
1365 cfs_time_seconds(cfs_time_current_sec() -
1366 (time_t)data->ioc_u64[0]));
1368 case IOC_LIBCFS_PORTALS_COMPATIBILITY:
1369 /* This can be removed once lustre stops calling it */
1372 case IOC_LIBCFS_LNET_DIST:
1373 rc = LNetDist(data->ioc_nid, &data->ioc_nid, &data->ioc_u32[1]);
1374 if (rc < 0 && rc != -EHOSTUNREACH)
1377 data->ioc_u32[0] = rc;
1380 case IOC_LIBCFS_TESTPROTOCOMPAT:
1382 the_lnet.ln_testprotocompat = data->ioc_flags;
1386 case IOC_LIBCFS_PING:
1387 id.nid = data->ioc_nid;
1388 id.pid = data->ioc_u32[0];
1389 rc = lnet_ping(id, data->ioc_u32[1], /* timeout */
1390 (lnet_process_id_t *)data->ioc_pbuf1,
1391 data->ioc_plen1/sizeof(lnet_process_id_t));
1394 data->ioc_count = rc;
1397 case IOC_LIBCFS_DEBUG_PEER: {
1398 /* CAVEAT EMPTOR: this one designed for calling directly; not
1400 id = *((lnet_process_id_t *) arg);
1402 lnet_debug_peer(id.nid);
1404 ni = lnet_net2ni(LNET_NIDNET(id.nid));
1406 CDEBUG(D_WARNING, "No NI for %s\n", libcfs_id2str(id));
1408 if (ni->ni_lnd->lnd_ctl == NULL) {
1409 CDEBUG(D_WARNING, "No ctl for %s\n",
1412 (void)ni->ni_lnd->lnd_ctl(ni, cmd, arg);
1421 ni = lnet_net2ni(data->ioc_net);
1425 if (ni->ni_lnd->lnd_ctl == NULL)
1428 rc = ni->ni_lnd->lnd_ctl(ni, cmd, arg);
1437 * Retrieve the lnet_process_id_t ID of LNet interface at \a index. Note that
1438 * all interfaces share a same PID, as requested by LNetNIInit().
1440 * \param index Index of the interface to look up.
1441 * \param id On successful return, this location will hold the
1442 * lnet_process_id_t ID of the interface.
1444 * \retval 0 If an interface exists at \a index.
1445 * \retval -ENOENT If no interface has been found.
1448 LNetGetId(unsigned int index, lnet_process_id_t *id)
1454 LASSERT (the_lnet.ln_init);
1455 LASSERT (the_lnet.ln_refcount > 0);
1459 cfs_list_for_each(tmp, &the_lnet.ln_nis) {
1463 ni = cfs_list_entry(tmp, lnet_ni_t, ni_list);
1465 id->nid = ni->ni_nid;
1466 id->pid = the_lnet.ln_pid;
1477 * Print a string representation of handle \a h into buffer \a str of
1481 LNetSnprintHandle(char *str, int len, lnet_handle_any_t h)
1483 snprintf(str, len, LPX64, h.cookie);
1487 lnet_create_ping_info(void)
1492 unsigned int infosz;
1494 lnet_process_id_t id;
1495 lnet_ping_info_t *pinfo;
1497 for (n = 0; ; n++) {
1498 rc = LNetGetId(n, &id);
1505 infosz = offsetof(lnet_ping_info_t, pi_ni[n]);
1506 LIBCFS_ALLOC(pinfo, infosz);
1507 if (pinfo == NULL) {
1508 CERROR("Can't allocate ping info[%d]\n", n);
1513 pinfo->pi_pid = the_lnet.ln_pid;
1514 pinfo->pi_magic = LNET_PROTO_PING_MAGIC;
1515 pinfo->pi_version = LNET_PROTO_PING_VERSION;
1517 for (i = 0; i < n; i++) {
1518 lnet_ni_status_t *ns = &pinfo->pi_ni[i];
1520 rc = LNetGetId(i, &id);
1523 ns->ns_nid = id.nid;
1524 ns->ns_status = LNET_NI_STATUS_UP;
1528 ni = lnet_nid2ni_locked(id.nid);
1529 LASSERT (ni != NULL);
1530 LASSERT (ni->ni_status == NULL);
1532 lnet_ni_decref_locked(ni);
1537 the_lnet.ln_ping_info = pinfo;
1542 lnet_destroy_ping_info(void)
1548 cfs_list_for_each_entry (ni, &the_lnet.ln_nis, ni_list) {
1549 ni->ni_status = NULL;
1554 LIBCFS_FREE(the_lnet.ln_ping_info,
1555 offsetof(lnet_ping_info_t,
1556 pi_ni[the_lnet.ln_ping_info->pi_nnis]));
1557 the_lnet.ln_ping_info = NULL;
1562 lnet_ping_target_init(void)
1565 lnet_handle_me_t meh;
1566 lnet_process_id_t id;
1571 rc = lnet_create_ping_info();
1575 /* We can have a tiny EQ since we only need to see the unlink event on
1576 * teardown, which by definition is the last one! */
1577 rc = LNetEQAlloc(2, LNET_EQ_HANDLER_NONE, &the_lnet.ln_ping_target_eq);
1579 CERROR("Can't allocate ping EQ: %d\n", rc);
1583 memset(&id, 0, sizeof(lnet_process_id_t));
1584 id.nid = LNET_NID_ANY;
1585 id.pid = LNET_PID_ANY;
1587 rc = LNetMEAttach(LNET_RESERVED_PORTAL, id,
1588 LNET_PROTO_PING_MATCHBITS, 0,
1589 LNET_UNLINK, LNET_INS_AFTER,
1592 CERROR("Can't create ping ME: %d\n", rc);
1596 /* initialize md content */
1597 infosz = offsetof(lnet_ping_info_t,
1598 pi_ni[the_lnet.ln_ping_info->pi_nnis]);
1599 md.start = the_lnet.ln_ping_info;
1601 md.threshold = LNET_MD_THRESH_INF;
1603 md.options = LNET_MD_OP_GET | LNET_MD_TRUNCATE |
1604 LNET_MD_MANAGE_REMOTE;
1606 md.eq_handle = the_lnet.ln_ping_target_eq;
1608 rc = LNetMDAttach(meh, md,
1610 &the_lnet.ln_ping_target_md);
1612 CERROR("Can't attach ping MD: %d\n", rc);
1619 rc2 = LNetMEUnlink(meh);
1622 rc2 = LNetEQFree(the_lnet.ln_ping_target_eq);
1625 lnet_destroy_ping_info();
1630 lnet_ping_target_fini(void)
1635 int timeout_ms = 1000;
1636 cfs_sigset_t blocked = cfs_block_allsigs();
1638 LNetMDUnlink(the_lnet.ln_ping_target_md);
1639 /* NB md could be busy; this just starts the unlink */
1642 rc = LNetEQPoll(&the_lnet.ln_ping_target_eq, 1,
1643 timeout_ms, &event, &which);
1645 /* I expect overflow... */
1646 LASSERT (rc >= 0 || rc == -EOVERFLOW);
1649 /* timed out: provide a diagnostic */
1650 CWARN("Still waiting for ping MD to unlink\n");
1655 /* Got a valid event */
1660 rc = LNetEQFree(the_lnet.ln_ping_target_eq);
1662 lnet_destroy_ping_info();
1663 cfs_restore_sigs(blocked);
1667 lnet_ping (lnet_process_id_t id, int timeout_ms, lnet_process_id_t *ids, int n_ids)
1669 lnet_handle_eq_t eqh;
1670 lnet_handle_md_t mdh;
1676 const int a_long_time = 60000; /* mS */
1677 int infosz = offsetof(lnet_ping_info_t, pi_ni[n_ids]);
1678 lnet_ping_info_t *info;
1679 lnet_process_id_t tmpid;
1684 cfs_sigset_t blocked;
1687 id.nid == LNET_NID_ANY ||
1688 timeout_ms > 500000 || /* arbitrary limit! */
1689 n_ids > 20) /* arbitrary limit! */
1692 if (id.pid == LNET_PID_ANY)
1693 id.pid = LUSTRE_SRV_LNET_PID;
1695 LIBCFS_ALLOC(info, infosz);
1699 /* NB 2 events max (including any unlink event) */
1700 rc = LNetEQAlloc(2, LNET_EQ_HANDLER_NONE, &eqh);
1702 CERROR("Can't allocate EQ: %d\n", rc);
1706 /* initialize md content */
1709 md.threshold = 2; /*GET/REPLY*/
1711 md.options = LNET_MD_TRUNCATE;
1715 rc = LNetMDBind(md, LNET_UNLINK, &mdh);
1717 CERROR("Can't bind MD: %d\n", rc);
1721 rc = LNetGet(LNET_NID_ANY, mdh, id,
1722 LNET_RESERVED_PORTAL,
1723 LNET_PROTO_PING_MATCHBITS, 0);
1726 /* Don't CERROR; this could be deliberate! */
1728 rc2 = LNetMDUnlink(mdh);
1731 /* NB must wait for the UNLINK event below... */
1733 timeout_ms = a_long_time;
1737 /* MUST block for unlink to complete */
1739 blocked = cfs_block_allsigs();
1741 rc2 = LNetEQPoll(&eqh, 1, timeout_ms, &event, &which);
1744 cfs_restore_sigs(blocked);
1746 CDEBUG(D_NET, "poll %d(%d %d)%s\n", rc2,
1747 (rc2 <= 0) ? -1 : event.type,
1748 (rc2 <= 0) ? -1 : event.status,
1749 (rc2 > 0 && event.unlinked) ? " unlinked" : "");
1751 LASSERT (rc2 != -EOVERFLOW); /* can't miss anything */
1753 if (rc2 <= 0 || event.status != 0) {
1754 /* timeout or error */
1755 if (!replied && rc == 0)
1756 rc = (rc2 < 0) ? rc2 :
1757 (rc2 == 0) ? -ETIMEDOUT :
1761 /* Ensure completion in finite time... */
1763 /* No assertion (racing with network) */
1765 timeout_ms = a_long_time;
1766 } else if (rc2 == 0) {
1767 /* timed out waiting for unlink */
1768 CWARN("ping %s: late network completion\n",
1771 } else if (event.type == LNET_EVENT_REPLY) {
1776 } while (rc2 <= 0 || !event.unlinked);
1780 CWARN("%s: Unexpected rc >= 0 but no reply!\n",
1787 LASSERT (nob >= 0 && nob <= infosz);
1789 rc = -EPROTO; /* if I can't parse... */
1792 /* can't check magic/version */
1793 CERROR("%s: ping info too short %d\n",
1794 libcfs_id2str(id), nob);
1798 if (info->pi_magic == __swab32(LNET_PROTO_PING_MAGIC)) {
1799 lnet_swap_pinginfo(info);
1800 } else if (info->pi_magic != LNET_PROTO_PING_MAGIC) {
1801 CERROR("%s: Unexpected magic %08x\n",
1802 libcfs_id2str(id), info->pi_magic);
1806 if (info->pi_version != LNET_PROTO_PING_VERSION) {
1807 CERROR("%s: Unexpected version 0x%x\n",
1808 libcfs_id2str(id), info->pi_version);
1812 if (nob < offsetof(lnet_ping_info_t, pi_ni[0])) {
1813 CERROR("%s: Short reply %d(%d min)\n", libcfs_id2str(id),
1814 nob, (int)offsetof(lnet_ping_info_t, pi_ni[0]));
1818 if (info->pi_nnis < n_ids)
1819 n_ids = info->pi_nnis;
1821 if (nob < offsetof(lnet_ping_info_t, pi_ni[n_ids])) {
1822 CERROR("%s: Short reply %d(%d expected)\n", libcfs_id2str(id),
1823 nob, (int)offsetof(lnet_ping_info_t, pi_ni[n_ids]));
1827 rc = -EFAULT; /* If I SEGV... */
1829 for (i = 0; i < n_ids; i++) {
1830 tmpid.pid = info->pi_pid;
1831 tmpid.nid = info->pi_ni[i].ns_nid;
1833 if (cfs_copy_to_user(&ids[i], &tmpid, sizeof(tmpid)))
1842 rc2 = LNetEQFree(eqh);
1844 CERROR("rc2 %d\n", rc2);
1848 LIBCFS_FREE(info, infosz);