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_eq_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_eq_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_eq_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]);
561 * Reserved API - do not use.
562 * Temporary workaround to allow uOSS and test programs force server
563 * mode in userspace. See comments near ln_server_mode_flag in
564 * lnet/lib-types.h */
568 the_lnet.ln_server_mode_flag = 1;
573 lnet_prepare(lnet_pid_t requested_pid)
575 /* Prepare to bring up the network */
578 LASSERT (the_lnet.ln_refcount == 0);
580 the_lnet.ln_routing = 0;
583 LASSERT ((requested_pid & LNET_PID_USERFLAG) == 0);
584 the_lnet.ln_pid = requested_pid;
586 if (the_lnet.ln_server_mode_flag) {/* server case (uOSS) */
587 LASSERT ((requested_pid & LNET_PID_USERFLAG) == 0);
589 if (cfs_curproc_uid())/* Only root can run user-space server */
591 the_lnet.ln_pid = requested_pid;
593 } else {/* client case (liblustre) */
595 /* My PID must be unique on this node and flag I'm userspace */
596 the_lnet.ln_pid = getpid() | LNET_PID_USERFLAG;
600 memset(&the_lnet.ln_counters, 0,
601 sizeof(the_lnet.ln_counters));
603 CFS_INIT_LIST_HEAD (&the_lnet.ln_test_peers);
604 CFS_INIT_LIST_HEAD (&the_lnet.ln_nis);
605 CFS_INIT_LIST_HEAD (&the_lnet.ln_zombie_nis);
606 CFS_INIT_LIST_HEAD (&the_lnet.ln_remote_nets);
607 CFS_INIT_LIST_HEAD (&the_lnet.ln_routers);
609 the_lnet.ln_interface_cookie = lnet_create_interface_cookie();
611 lnet_init_rtrpools();
613 rc = lnet_peer_table_create();
617 /* NB: we will have instance of message container per CPT soon */
618 rc = lnet_msg_container_setup(&the_lnet.ln_msg_container);
622 rc = lnet_res_container_setup(&the_lnet.ln_eq_container,
623 LNET_COOKIE_TYPE_EQ, LNET_FL_MAX_EQS,
626 CERROR("Failed to create EQ container for LNet: %d\n", rc);
630 /* NB: we will have instance of ME container per CPT soon */
631 rc = lnet_res_container_setup(&the_lnet.ln_me_container,
632 LNET_COOKIE_TYPE_ME, LNET_FL_MAX_MES,
635 CERROR("Failed to create ME container for LNet: %d\n", rc);
639 /* NB: we will have instance of MD container per CPT soon */
640 rc = lnet_res_container_setup(&the_lnet.ln_md_container,
641 LNET_COOKIE_TYPE_MD, LNET_FL_MAX_MDS,
642 sizeof(lnet_libmd_t));
644 CERROR("Failed to create MD container for LNet: %d\n", rc);
648 rc = lnet_portals_create();
650 CERROR("Failed to create portals for LNet: %d\n", rc);
657 /* NB: lnet_res_container_cleanup is safe to call for
658 * uninitialized container */
659 lnet_res_container_cleanup(&the_lnet.ln_md_container);
660 lnet_res_container_cleanup(&the_lnet.ln_me_container);
661 lnet_res_container_cleanup(&the_lnet.ln_eq_container);
663 lnet_msg_container_cleanup(&the_lnet.ln_msg_container);
665 lnet_peer_table_destroy();
671 lnet_unprepare (void)
673 /* NB no LNET_LOCK since this is the last reference. All LND instances
674 * have shut down already, so it is safe to unlink and free all
675 * descriptors, even those that appear committed to a network op (eg MD
676 * with non-zero pending count) */
678 lnet_fail_nid(LNET_NID_ANY, 0);
680 LASSERT (cfs_list_empty(&the_lnet.ln_test_peers));
681 LASSERT (the_lnet.ln_refcount == 0);
682 LASSERT (cfs_list_empty(&the_lnet.ln_nis));
683 LASSERT (cfs_list_empty(&the_lnet.ln_zombie_nis));
684 LASSERT (the_lnet.ln_nzombie_nis == 0);
686 lnet_portals_destroy();
688 lnet_res_container_cleanup(&the_lnet.ln_md_container);
689 lnet_res_container_cleanup(&the_lnet.ln_me_container);
690 lnet_res_container_cleanup(&the_lnet.ln_eq_container);
692 lnet_free_rtrpools();
693 lnet_msg_container_cleanup(&the_lnet.ln_msg_container);
694 lnet_peer_table_destroy();
700 lnet_net2ni_locked (__u32 net)
705 cfs_list_for_each (tmp, &the_lnet.ln_nis) {
706 ni = cfs_list_entry(tmp, lnet_ni_t, ni_list);
708 if (LNET_NIDNET(ni->ni_nid) == net) {
709 lnet_ni_addref_locked(ni);
718 lnet_islocalnet (__u32 net)
723 ni = lnet_net2ni_locked(net);
725 lnet_ni_decref_locked(ni);
732 lnet_nid2ni_locked (lnet_nid_t nid)
737 cfs_list_for_each (tmp, &the_lnet.ln_nis) {
738 ni = cfs_list_entry(tmp, lnet_ni_t, ni_list);
740 if (ni->ni_nid == nid) {
741 lnet_ni_addref_locked(ni);
750 lnet_islocalnid (lnet_nid_t nid)
755 ni = lnet_nid2ni_locked(nid);
757 lnet_ni_decref_locked(ni);
764 lnet_count_acceptor_nis (void)
766 /* Return the # of NIs that need the acceptor. */
768 #if defined(__KERNEL__) || defined(HAVE_LIBPTHREAD)
773 cfs_list_for_each (tmp, &the_lnet.ln_nis) {
774 ni = cfs_list_entry(tmp, lnet_ni_t, ni_list);
776 if (ni->ni_lnd->lnd_accept != NULL)
782 #endif /* defined(__KERNEL__) || defined(HAVE_LIBPTHREAD) */
787 lnet_shutdown_lndnis (void)
793 /* NB called holding the global mutex */
795 /* All quiet on the API front */
796 LASSERT (!the_lnet.ln_shutdown);
797 LASSERT (the_lnet.ln_refcount == 0);
798 LASSERT (cfs_list_empty(&the_lnet.ln_zombie_nis));
799 LASSERT (the_lnet.ln_nzombie_nis == 0);
800 LASSERT (cfs_list_empty(&the_lnet.ln_remote_nets));
803 the_lnet.ln_shutdown = 1; /* flag shutdown */
805 /* Unlink NIs from the global table */
806 while (!cfs_list_empty(&the_lnet.ln_nis)) {
807 ni = cfs_list_entry(the_lnet.ln_nis.next,
809 cfs_list_del (&ni->ni_list);
811 the_lnet.ln_nzombie_nis++;
812 lnet_ni_decref_locked(ni); /* drop ln_nis' ref */
815 /* Drop the cached eqwait NI. */
816 if (the_lnet.ln_eq_waitni != NULL) {
817 lnet_ni_decref_locked(the_lnet.ln_eq_waitni);
818 the_lnet.ln_eq_waitni = NULL;
821 /* Drop the cached loopback NI. */
822 if (the_lnet.ln_loni != NULL) {
823 lnet_ni_decref_locked(the_lnet.ln_loni);
824 the_lnet.ln_loni = NULL;
829 /* Clear lazy portals and drop delayed messages which hold refs
830 * on their lnet_msg_t::msg_rxpeer */
831 for (i = 0; i < the_lnet.ln_nportals; i++)
832 LNetClearLazyPortal(i);
834 /* Clear the peer table and wait for all peers to go (they hold refs on
836 lnet_peer_table_cleanup();
839 /* Now wait for the NI's I just nuked to show up on ln_zombie_nis
840 * and shut them down in guaranteed thread context */
842 while (the_lnet.ln_nzombie_nis != 0) {
844 while (cfs_list_empty(&the_lnet.ln_zombie_nis)) {
848 CDEBUG(D_WARNING,"Waiting for %d zombie NIs\n",
849 the_lnet.ln_nzombie_nis);
850 cfs_pause(cfs_time_seconds(1));
854 ni = cfs_list_entry(the_lnet.ln_zombie_nis.next,
856 cfs_list_del(&ni->ni_list);
857 ni->ni_lnd->lnd_refcount--;
861 islo = ni->ni_lnd->lnd_type == LOLND;
863 LASSERT (!cfs_in_interrupt ());
864 (ni->ni_lnd->lnd_shutdown)(ni);
866 /* can't deref lnd anymore now; it might have unregistered
870 CDEBUG(D_LNI, "Removed LNI %s\n",
871 libcfs_nid2str(ni->ni_nid));
873 LIBCFS_FREE(ni, sizeof(*ni));
876 the_lnet.ln_nzombie_nis--;
879 the_lnet.ln_shutdown = 0;
882 if (the_lnet.ln_network_tokens != NULL) {
883 LIBCFS_FREE(the_lnet.ln_network_tokens,
884 the_lnet.ln_network_tokens_nob);
885 the_lnet.ln_network_tokens = NULL;
890 lnet_startup_lndnis (void)
898 char *nets = lnet_get_networks();
900 CFS_INIT_LIST_HEAD(&nilist);
905 rc = lnet_parse_networks(&nilist, nets);
909 while (!cfs_list_empty(&nilist)) {
910 ni = cfs_list_entry(nilist.next, lnet_ni_t, ni_list);
911 lnd_type = LNET_NETTYP(LNET_NIDNET(ni->ni_nid));
913 LASSERT (libcfs_isknown_lnd(lnd_type));
915 if (lnd_type == CIBLND ||
916 lnd_type == OPENIBLND ||
917 lnd_type == IIBLND ||
918 lnd_type == VIBLND) {
919 CERROR("LND %s obsoleted\n",
920 libcfs_lnd2str(lnd_type));
924 LNET_MUTEX_LOCK(&the_lnet.ln_lnd_mutex);
925 lnd = lnet_find_lnd_by_type(lnd_type);
929 LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
930 rc = cfs_request_module("%s",
931 libcfs_lnd2modname(lnd_type));
932 LNET_MUTEX_LOCK(&the_lnet.ln_lnd_mutex);
934 lnd = lnet_find_lnd_by_type(lnd_type);
936 LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
937 CERROR("Can't load LND %s, module %s, rc=%d\n",
938 libcfs_lnd2str(lnd_type),
939 libcfs_lnd2modname(lnd_type), rc);
940 #ifndef HAVE_MODULE_LOADING_SUPPORT
941 LCONSOLE_ERROR_MSG(0x104, "Your kernel must be "
942 "compiled with kernel module "
950 LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
951 CERROR("LND %s not supported\n",
952 libcfs_lnd2str(lnd_type));
965 rc = (lnd->lnd_startup)(ni);
967 LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
970 LCONSOLE_ERROR_MSG(0x105, "Error %d starting up LNI %s"
972 rc, libcfs_lnd2str(lnd->lnd_type));
979 LASSERT (ni->ni_peertimeout <= 0 || lnd->lnd_query != NULL);
981 cfs_list_del(&ni->ni_list);
984 cfs_list_add_tail(&ni->ni_list, &the_lnet.ln_nis);
987 if (lnd->lnd_type == LOLND) {
989 LASSERT (the_lnet.ln_loni == NULL);
990 the_lnet.ln_loni = ni;
995 if (lnd->lnd_wait != NULL) {
996 if (the_lnet.ln_eq_waitni == NULL) {
998 the_lnet.ln_eq_waitni = ni;
1001 # ifndef HAVE_LIBPTHREAD
1002 LCONSOLE_ERROR_MSG(0x106, "LND %s not supported in a "
1003 "single-threaded runtime\n",
1004 libcfs_lnd2str(lnd_type));
1009 if (ni->ni_peertxcredits == 0 ||
1010 ni->ni_maxtxcredits == 0) {
1011 LCONSOLE_ERROR_MSG(0x107, "LNI %s has no %scredits\n",
1012 libcfs_lnd2str(lnd->lnd_type),
1013 ni->ni_peertxcredits == 0 ?
1018 ni->ni_txcredits = ni->ni_mintxcredits = ni->ni_maxtxcredits;
1020 CDEBUG(D_LNI, "Added LNI %s [%d/%d/%d/%d]\n",
1021 libcfs_nid2str(ni->ni_nid),
1022 ni->ni_peertxcredits, ni->ni_txcredits,
1023 ni->ni_peerrtrcredits, ni->ni_peertimeout);
1028 if (the_lnet.ln_eq_waitni != NULL && nicount > 1) {
1029 lnd_type = the_lnet.ln_eq_waitni->ni_lnd->lnd_type;
1030 LCONSOLE_ERROR_MSG(0x109, "LND %s can only run single-network"
1032 libcfs_lnd2str(lnd_type));
1039 lnet_shutdown_lndnis();
1041 while (!cfs_list_empty(&nilist)) {
1042 ni = cfs_list_entry(nilist.next, lnet_ni_t, ni_list);
1043 cfs_list_del(&ni->ni_list);
1044 LIBCFS_FREE(ni, sizeof(*ni));
1051 * Initialize LNet library.
1053 * Only userspace program needs to call this function - it's automatically
1054 * called in the kernel at module loading time. Caller has to call LNetFini()
1055 * after a call to LNetInit(), if and only if the latter returned 0. It must
1056 * be called exactly once.
1058 * \return 0 on success, and -ve on failures.
1063 lnet_assert_wire_constants ();
1064 LASSERT (!the_lnet.ln_init);
1066 memset(&the_lnet, 0, sizeof(the_lnet));
1069 the_lnet.ln_refcount = 0;
1070 the_lnet.ln_init = 1;
1071 LNetInvalidateHandle(&the_lnet.ln_rc_eqh);
1072 CFS_INIT_LIST_HEAD(&the_lnet.ln_lnds);
1073 CFS_INIT_LIST_HEAD(&the_lnet.ln_rcd_zombie);
1074 CFS_INIT_LIST_HEAD(&the_lnet.ln_rcd_deathrow);
1077 /* All LNDs apart from the LOLND are in separate modules. They
1078 * register themselves when their module loads, and unregister
1079 * themselves when their module is unloaded. */
1082 * NB the order here determines default 'networks=' order */
1084 LNET_REGISTER_ULND(the_ptllnd);
1086 # ifdef HAVE_LIBPTHREAD
1087 LNET_REGISTER_ULND(the_tcplnd);
1090 lnet_register_lnd(&the_lolnd);
1095 * Finalize LNet library.
1097 * Only userspace program needs to call this function. It can be called
1100 * \pre LNetInit() called with success.
1101 * \pre All LNet users called LNetNIFini() for matching LNetNIInit() calls.
1106 LASSERT (the_lnet.ln_init);
1107 LASSERT (the_lnet.ln_refcount == 0);
1109 while (!cfs_list_empty(&the_lnet.ln_lnds))
1110 lnet_unregister_lnd(cfs_list_entry(the_lnet.ln_lnds.next,
1114 the_lnet.ln_init = 0;
1118 * Set LNet PID and start LNet interfaces, routing, and forwarding.
1120 * Userspace program should call this after a successful call to LNetInit().
1121 * Users must call this function at least once before any other functions.
1122 * For each successful call there must be a corresponding call to
1123 * LNetNIFini(). For subsequent calls to LNetNIInit(), \a requested_pid is
1126 * The PID used by LNet may be different from the one requested.
1129 * \param requested_pid PID requested by the caller.
1131 * \return >= 0 on success, and < 0 error code on failures.
1134 LNetNIInit(lnet_pid_t requested_pid)
1136 int im_a_router = 0;
1139 LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
1141 LASSERT (the_lnet.ln_init);
1142 CDEBUG(D_OTHER, "refs %d\n", the_lnet.ln_refcount);
1144 if (the_lnet.ln_refcount > 0) {
1145 rc = the_lnet.ln_refcount++;
1149 lnet_get_tunables();
1151 if (requested_pid == LNET_PID_ANY) {
1152 /* Don't instantiate LNET just for me */
1157 rc = lnet_prepare(requested_pid);
1161 rc = lnet_startup_lndnis();
1165 rc = lnet_parse_routes(lnet_get_routes(), &im_a_router);
1169 rc = lnet_check_routes();
1173 rc = lnet_alloc_rtrpools(im_a_router);
1177 rc = lnet_acceptor_start();
1181 the_lnet.ln_refcount = 1;
1182 /* Now I may use my own API functions... */
1184 /* NB router checker needs the_lnet.ln_ping_info in
1185 * lnet_router_checker -> lnet_update_ni_status_locked */
1186 rc = lnet_ping_target_init();
1190 rc = lnet_router_checker_start();
1198 lnet_ping_target_fini();
1200 the_lnet.ln_refcount = 0;
1201 lnet_acceptor_stop();
1203 lnet_destroy_routes();
1204 lnet_shutdown_lndnis();
1210 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
1215 * Stop LNet interfaces, routing, and forwarding.
1217 * Users must call this function once for each successful call to LNetNIInit().
1218 * Once the LNetNIFini() operation has been started, the results of pending
1219 * API operations are undefined.
1221 * \return always 0 for current implementation.
1226 LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
1228 LASSERT (the_lnet.ln_init);
1229 LASSERT (the_lnet.ln_refcount > 0);
1231 if (the_lnet.ln_refcount != 1) {
1232 the_lnet.ln_refcount--;
1234 LASSERT (!the_lnet.ln_niinit_self);
1237 lnet_router_checker_stop();
1238 lnet_ping_target_fini();
1240 /* Teardown fns that use my own API functions BEFORE here */
1241 the_lnet.ln_refcount = 0;
1243 lnet_acceptor_stop();
1244 lnet_destroy_routes();
1245 lnet_shutdown_lndnis();
1249 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
1254 * This is an ugly hack to export IOC_LIBCFS_DEBUG_PEER and
1255 * IOC_LIBCFS_PORTALS_COMPATIBILITY commands to users, by tweaking the LNet
1256 * internal ioctl handler.
1258 * IOC_LIBCFS_PORTALS_COMPATIBILITY is now deprecated, don't use it.
1260 * \param cmd IOC_LIBCFS_DEBUG_PEER to print debugging data about a peer.
1261 * The data will be printed to system console. Don't use it excessively.
1262 * \param arg A pointer to lnet_process_id_t, process ID of the peer.
1264 * \return Always return 0 when called by users directly (i.e., not via ioctl).
1267 LNetCtl(unsigned int cmd, void *arg)
1269 struct libcfs_ioctl_data *data = arg;
1270 lnet_process_id_t id = {0};
1274 LASSERT (the_lnet.ln_init);
1275 LASSERT (the_lnet.ln_refcount > 0);
1278 case IOC_LIBCFS_GET_NI:
1279 rc = LNetGetId(data->ioc_count, &id);
1280 data->ioc_nid = id.nid;
1283 case IOC_LIBCFS_FAIL_NID:
1284 return lnet_fail_nid(data->ioc_nid, data->ioc_count);
1286 case IOC_LIBCFS_ADD_ROUTE:
1287 rc = lnet_add_route(data->ioc_net, data->ioc_count,
1289 return (rc != 0) ? rc : lnet_check_routes();
1291 case IOC_LIBCFS_DEL_ROUTE:
1292 return lnet_del_route(data->ioc_net, data->ioc_nid);
1294 case IOC_LIBCFS_GET_ROUTE:
1295 return lnet_get_route(data->ioc_count,
1296 &data->ioc_net, &data->ioc_count,
1297 &data->ioc_nid, &data->ioc_flags);
1298 case IOC_LIBCFS_NOTIFY_ROUTER:
1299 return lnet_notify(NULL, data->ioc_nid, data->ioc_flags,
1300 cfs_time_current() -
1301 cfs_time_seconds(cfs_time_current_sec() -
1302 (time_t)data->ioc_u64[0]));
1304 case IOC_LIBCFS_PORTALS_COMPATIBILITY:
1305 /* This can be removed once lustre stops calling it */
1308 case IOC_LIBCFS_LNET_DIST:
1309 rc = LNetDist(data->ioc_nid, &data->ioc_nid, &data->ioc_u32[1]);
1310 if (rc < 0 && rc != -EHOSTUNREACH)
1313 data->ioc_u32[0] = rc;
1316 case IOC_LIBCFS_TESTPROTOCOMPAT:
1318 the_lnet.ln_testprotocompat = data->ioc_flags;
1322 case IOC_LIBCFS_PING:
1323 id.nid = data->ioc_nid;
1324 id.pid = data->ioc_u32[0];
1325 rc = lnet_ping(id, data->ioc_u32[1], /* timeout */
1326 (lnet_process_id_t *)data->ioc_pbuf1,
1327 data->ioc_plen1/sizeof(lnet_process_id_t));
1330 data->ioc_count = rc;
1333 case IOC_LIBCFS_DEBUG_PEER: {
1334 /* CAVEAT EMPTOR: this one designed for calling directly; not
1336 id = *((lnet_process_id_t *) arg);
1338 lnet_debug_peer(id.nid);
1340 ni = lnet_net2ni(LNET_NIDNET(id.nid));
1342 CDEBUG(D_WARNING, "No NI for %s\n", libcfs_id2str(id));
1344 if (ni->ni_lnd->lnd_ctl == NULL) {
1345 CDEBUG(D_WARNING, "No ctl for %s\n",
1348 (void)ni->ni_lnd->lnd_ctl(ni, cmd, arg);
1357 ni = lnet_net2ni(data->ioc_net);
1361 if (ni->ni_lnd->lnd_ctl == NULL)
1364 rc = ni->ni_lnd->lnd_ctl(ni, cmd, arg);
1373 * Retrieve the lnet_process_id_t ID of LNet interface at \a index. Note that
1374 * all interfaces share a same PID, as requested by LNetNIInit().
1376 * \param index Index of the interface to look up.
1377 * \param id On successful return, this location will hold the
1378 * lnet_process_id_t ID of the interface.
1380 * \retval 0 If an interface exists at \a index.
1381 * \retval -ENOENT If no interface has been found.
1384 LNetGetId(unsigned int index, lnet_process_id_t *id)
1390 LASSERT (the_lnet.ln_init);
1391 LASSERT (the_lnet.ln_refcount > 0);
1395 cfs_list_for_each(tmp, &the_lnet.ln_nis) {
1399 ni = cfs_list_entry(tmp, lnet_ni_t, ni_list);
1401 id->nid = ni->ni_nid;
1402 id->pid = the_lnet.ln_pid;
1413 * Print a string representation of handle \a h into buffer \a str of
1417 LNetSnprintHandle(char *str, int len, lnet_handle_any_t h)
1419 snprintf(str, len, LPX64, h.cookie);
1423 lnet_create_ping_info(void)
1428 unsigned int infosz;
1430 lnet_process_id_t id;
1431 lnet_ping_info_t *pinfo;
1433 for (n = 0; ; n++) {
1434 rc = LNetGetId(n, &id);
1441 infosz = offsetof(lnet_ping_info_t, pi_ni[n]);
1442 LIBCFS_ALLOC(pinfo, infosz);
1443 if (pinfo == NULL) {
1444 CERROR("Can't allocate ping info[%d]\n", n);
1449 pinfo->pi_pid = the_lnet.ln_pid;
1450 pinfo->pi_magic = LNET_PROTO_PING_MAGIC;
1451 pinfo->pi_version = LNET_PROTO_PING_VERSION;
1453 for (i = 0; i < n; i++) {
1454 lnet_ni_status_t *ns = &pinfo->pi_ni[i];
1456 rc = LNetGetId(i, &id);
1459 ns->ns_nid = id.nid;
1460 ns->ns_status = LNET_NI_STATUS_UP;
1464 ni = lnet_nid2ni_locked(id.nid);
1465 LASSERT (ni != NULL);
1466 LASSERT (ni->ni_status == NULL);
1468 lnet_ni_decref_locked(ni);
1473 the_lnet.ln_ping_info = pinfo;
1478 lnet_destroy_ping_info(void)
1484 cfs_list_for_each_entry (ni, &the_lnet.ln_nis, ni_list) {
1485 ni->ni_status = NULL;
1490 LIBCFS_FREE(the_lnet.ln_ping_info,
1491 offsetof(lnet_ping_info_t,
1492 pi_ni[the_lnet.ln_ping_info->pi_nnis]));
1493 the_lnet.ln_ping_info = NULL;
1498 lnet_ping_target_init(void)
1501 lnet_handle_me_t meh;
1502 lnet_process_id_t id;
1507 rc = lnet_create_ping_info();
1511 /* We can have a tiny EQ since we only need to see the unlink event on
1512 * teardown, which by definition is the last one! */
1513 rc = LNetEQAlloc(2, LNET_EQ_HANDLER_NONE, &the_lnet.ln_ping_target_eq);
1515 CERROR("Can't allocate ping EQ: %d\n", rc);
1519 memset(&id, 0, sizeof(lnet_process_id_t));
1520 id.nid = LNET_NID_ANY;
1521 id.pid = LNET_PID_ANY;
1523 rc = LNetMEAttach(LNET_RESERVED_PORTAL, id,
1524 LNET_PROTO_PING_MATCHBITS, 0,
1525 LNET_UNLINK, LNET_INS_AFTER,
1528 CERROR("Can't create ping ME: %d\n", rc);
1532 /* initialize md content */
1533 infosz = offsetof(lnet_ping_info_t,
1534 pi_ni[the_lnet.ln_ping_info->pi_nnis]);
1535 md.start = the_lnet.ln_ping_info;
1537 md.threshold = LNET_MD_THRESH_INF;
1539 md.options = LNET_MD_OP_GET | LNET_MD_TRUNCATE |
1540 LNET_MD_MANAGE_REMOTE;
1542 md.eq_handle = the_lnet.ln_ping_target_eq;
1544 rc = LNetMDAttach(meh, md,
1546 &the_lnet.ln_ping_target_md);
1548 CERROR("Can't attach ping MD: %d\n", rc);
1555 rc2 = LNetMEUnlink(meh);
1558 rc2 = LNetEQFree(the_lnet.ln_ping_target_eq);
1561 lnet_destroy_ping_info();
1566 lnet_ping_target_fini(void)
1571 int timeout_ms = 1000;
1572 cfs_sigset_t blocked = cfs_block_allsigs();
1574 LNetMDUnlink(the_lnet.ln_ping_target_md);
1575 /* NB md could be busy; this just starts the unlink */
1578 rc = LNetEQPoll(&the_lnet.ln_ping_target_eq, 1,
1579 timeout_ms, &event, &which);
1581 /* I expect overflow... */
1582 LASSERT (rc >= 0 || rc == -EOVERFLOW);
1585 /* timed out: provide a diagnostic */
1586 CWARN("Still waiting for ping MD to unlink\n");
1591 /* Got a valid event */
1596 rc = LNetEQFree(the_lnet.ln_ping_target_eq);
1598 lnet_destroy_ping_info();
1599 cfs_restore_sigs(blocked);
1603 lnet_ping (lnet_process_id_t id, int timeout_ms, lnet_process_id_t *ids, int n_ids)
1605 lnet_handle_eq_t eqh;
1606 lnet_handle_md_t mdh;
1612 const int a_long_time = 60000; /* mS */
1613 int infosz = offsetof(lnet_ping_info_t, pi_ni[n_ids]);
1614 lnet_ping_info_t *info;
1615 lnet_process_id_t tmpid;
1620 cfs_sigset_t blocked;
1623 id.nid == LNET_NID_ANY ||
1624 timeout_ms > 500000 || /* arbitrary limit! */
1625 n_ids > 20) /* arbitrary limit! */
1628 if (id.pid == LNET_PID_ANY)
1629 id.pid = LUSTRE_SRV_LNET_PID;
1631 LIBCFS_ALLOC(info, infosz);
1635 /* NB 2 events max (including any unlink event) */
1636 rc = LNetEQAlloc(2, LNET_EQ_HANDLER_NONE, &eqh);
1638 CERROR("Can't allocate EQ: %d\n", rc);
1642 /* initialize md content */
1645 md.threshold = 2; /*GET/REPLY*/
1647 md.options = LNET_MD_TRUNCATE;
1651 rc = LNetMDBind(md, LNET_UNLINK, &mdh);
1653 CERROR("Can't bind MD: %d\n", rc);
1657 rc = LNetGet(LNET_NID_ANY, mdh, id,
1658 LNET_RESERVED_PORTAL,
1659 LNET_PROTO_PING_MATCHBITS, 0);
1662 /* Don't CERROR; this could be deliberate! */
1664 rc2 = LNetMDUnlink(mdh);
1667 /* NB must wait for the UNLINK event below... */
1669 timeout_ms = a_long_time;
1673 /* MUST block for unlink to complete */
1675 blocked = cfs_block_allsigs();
1677 rc2 = LNetEQPoll(&eqh, 1, timeout_ms, &event, &which);
1680 cfs_restore_sigs(blocked);
1682 CDEBUG(D_NET, "poll %d(%d %d)%s\n", rc2,
1683 (rc2 <= 0) ? -1 : event.type,
1684 (rc2 <= 0) ? -1 : event.status,
1685 (rc2 > 0 && event.unlinked) ? " unlinked" : "");
1687 LASSERT (rc2 != -EOVERFLOW); /* can't miss anything */
1689 if (rc2 <= 0 || event.status != 0) {
1690 /* timeout or error */
1691 if (!replied && rc == 0)
1692 rc = (rc2 < 0) ? rc2 :
1693 (rc2 == 0) ? -ETIMEDOUT :
1697 /* Ensure completion in finite time... */
1699 /* No assertion (racing with network) */
1701 timeout_ms = a_long_time;
1702 } else if (rc2 == 0) {
1703 /* timed out waiting for unlink */
1704 CWARN("ping %s: late network completion\n",
1707 } else if (event.type == LNET_EVENT_REPLY) {
1712 } while (rc2 <= 0 || !event.unlinked);
1716 CWARN("%s: Unexpected rc >= 0 but no reply!\n",
1723 LASSERT (nob >= 0 && nob <= infosz);
1725 rc = -EPROTO; /* if I can't parse... */
1728 /* can't check magic/version */
1729 CERROR("%s: ping info too short %d\n",
1730 libcfs_id2str(id), nob);
1734 if (info->pi_magic == __swab32(LNET_PROTO_PING_MAGIC)) {
1735 lnet_swap_pinginfo(info);
1736 } else if (info->pi_magic != LNET_PROTO_PING_MAGIC) {
1737 CERROR("%s: Unexpected magic %08x\n",
1738 libcfs_id2str(id), info->pi_magic);
1742 if (info->pi_version != LNET_PROTO_PING_VERSION) {
1743 CERROR("%s: Unexpected version 0x%x\n",
1744 libcfs_id2str(id), info->pi_version);
1748 if (nob < offsetof(lnet_ping_info_t, pi_ni[0])) {
1749 CERROR("%s: Short reply %d(%d min)\n", libcfs_id2str(id),
1750 nob, (int)offsetof(lnet_ping_info_t, pi_ni[0]));
1754 if (info->pi_nnis < n_ids)
1755 n_ids = info->pi_nnis;
1757 if (nob < offsetof(lnet_ping_info_t, pi_ni[n_ids])) {
1758 CERROR("%s: Short reply %d(%d expected)\n", libcfs_id2str(id),
1759 nob, (int)offsetof(lnet_ping_info_t, pi_ni[n_ids]));
1763 rc = -EFAULT; /* If I SEGV... */
1765 for (i = 0; i < n_ids; i++) {
1766 tmpid.pid = info->pi_pid;
1767 tmpid.nid = info->pi_ni[i].ns_nid;
1769 if (cfs_copy_to_user(&ids[i], &tmpid, sizeof(tmpid)))
1778 rc2 = LNetEQFree(eqh);
1780 CERROR("rc2 %d\n", rc2);
1784 LIBCFS_FREE(info, infosz);