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_spin_lock_init(&the_lnet.ln_res_lock);
96 cfs_waitq_init(&the_lnet.ln_eq_waitq);
97 cfs_mutex_init(&the_lnet.ln_lnd_mutex);
98 cfs_mutex_init(&the_lnet.ln_api_mutex);
102 lnet_fini_locks(void)
109 lnet_get_routes(void)
111 char *str = getenv("LNET_ROUTES");
113 return (str == NULL) ? "" : str;
117 lnet_get_networks (void)
119 static char default_networks[256];
120 char *networks = getenv ("LNET_NETWORKS");
121 char *ip2nets = getenv ("LNET_IP2NETS");
130 if (networks != NULL && ip2nets != NULL) {
131 LCONSOLE_ERROR_MSG(0x103, "Please set EITHER 'LNET_NETWORKS' or"
132 " 'LNET_IP2NETS' but not both at once\n");
136 if (ip2nets != NULL) {
137 rc = lnet_parse_ip2nets(&networks, ip2nets);
138 return (rc == 0) ? networks : NULL;
141 SET_BUT_UNUSED(ip2nets);
144 if (networks != NULL)
147 /* In userland, the default 'networks=' is the list of known net types */
149 len = sizeof(default_networks);
150 str = default_networks;
154 cfs_list_for_each (tmp, &the_lnet.ln_lnds) {
155 lnd_t *lnd = cfs_list_entry(tmp, lnd_t, lnd_list);
157 nob = snprintf(str, len, "%s%s", sep,
158 libcfs_lnd2str(lnd->lnd_type));
161 /* overflowed the string; leave it where it was */
170 return default_networks;
173 # ifndef HAVE_LIBPTHREAD
175 void lnet_init_locks(void)
177 the_lnet.ln_lock = 0;
178 the_lnet.ln_res_lock = 0;
179 the_lnet.ln_lnd_mutex = 0;
180 the_lnet.ln_api_mutex = 0;
183 void lnet_fini_locks(void)
185 LASSERT(the_lnet.ln_api_mutex == 0);
186 LASSERT(the_lnet.ln_lnd_mutex == 0);
187 LASSERT(the_lnet.ln_lock == 0);
188 LASSERT(the_lnet.ln_res_lock == 0);
193 void lnet_init_locks(void)
195 pthread_cond_init(&the_lnet.ln_eq_cond, NULL);
196 pthread_mutex_init(&the_lnet.ln_lock, NULL);
197 pthread_mutex_init(&the_lnet.ln_res_lock, NULL);
198 pthread_mutex_init(&the_lnet.ln_lnd_mutex, NULL);
199 pthread_mutex_init(&the_lnet.ln_api_mutex, NULL);
202 void lnet_fini_locks(void)
204 pthread_mutex_destroy(&the_lnet.ln_api_mutex);
205 pthread_mutex_destroy(&the_lnet.ln_lnd_mutex);
206 pthread_mutex_destroy(&the_lnet.ln_lock);
207 pthread_mutex_destroy(&the_lnet.ln_res_lock);
208 pthread_cond_destroy(&the_lnet.ln_eq_cond);
214 void lnet_assert_wire_constants (void)
216 /* Wire protocol assertions generated by 'wirecheck'
217 * running on Linux robert.bartonsoftware.com 2.6.8-1.521
218 * #1 Mon Aug 16 09:01:18 EDT 2004 i686 athlon i386 GNU/Linux
219 * with gcc version 3.3.3 20040412 (Red Hat Linux 3.3.3-7) */
222 CLASSERT (LNET_PROTO_TCP_MAGIC == 0xeebc0ded);
223 CLASSERT (LNET_PROTO_TCP_VERSION_MAJOR == 1);
224 CLASSERT (LNET_PROTO_TCP_VERSION_MINOR == 0);
225 CLASSERT (LNET_MSG_ACK == 0);
226 CLASSERT (LNET_MSG_PUT == 1);
227 CLASSERT (LNET_MSG_GET == 2);
228 CLASSERT (LNET_MSG_REPLY == 3);
229 CLASSERT (LNET_MSG_HELLO == 4);
231 /* Checks for struct ptl_handle_wire_t */
232 CLASSERT ((int)sizeof(lnet_handle_wire_t) == 16);
233 CLASSERT ((int)offsetof(lnet_handle_wire_t, wh_interface_cookie) == 0);
234 CLASSERT ((int)sizeof(((lnet_handle_wire_t *)0)->wh_interface_cookie) == 8);
235 CLASSERT ((int)offsetof(lnet_handle_wire_t, wh_object_cookie) == 8);
236 CLASSERT ((int)sizeof(((lnet_handle_wire_t *)0)->wh_object_cookie) == 8);
238 /* Checks for struct lnet_magicversion_t */
239 CLASSERT ((int)sizeof(lnet_magicversion_t) == 8);
240 CLASSERT ((int)offsetof(lnet_magicversion_t, magic) == 0);
241 CLASSERT ((int)sizeof(((lnet_magicversion_t *)0)->magic) == 4);
242 CLASSERT ((int)offsetof(lnet_magicversion_t, version_major) == 4);
243 CLASSERT ((int)sizeof(((lnet_magicversion_t *)0)->version_major) == 2);
244 CLASSERT ((int)offsetof(lnet_magicversion_t, version_minor) == 6);
245 CLASSERT ((int)sizeof(((lnet_magicversion_t *)0)->version_minor) == 2);
247 /* Checks for struct lnet_hdr_t */
248 CLASSERT ((int)sizeof(lnet_hdr_t) == 72);
249 CLASSERT ((int)offsetof(lnet_hdr_t, dest_nid) == 0);
250 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->dest_nid) == 8);
251 CLASSERT ((int)offsetof(lnet_hdr_t, src_nid) == 8);
252 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->src_nid) == 8);
253 CLASSERT ((int)offsetof(lnet_hdr_t, dest_pid) == 16);
254 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->dest_pid) == 4);
255 CLASSERT ((int)offsetof(lnet_hdr_t, src_pid) == 20);
256 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->src_pid) == 4);
257 CLASSERT ((int)offsetof(lnet_hdr_t, type) == 24);
258 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->type) == 4);
259 CLASSERT ((int)offsetof(lnet_hdr_t, payload_length) == 28);
260 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->payload_length) == 4);
261 CLASSERT ((int)offsetof(lnet_hdr_t, msg) == 32);
262 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg) == 40);
265 CLASSERT ((int)offsetof(lnet_hdr_t, msg.ack.dst_wmd) == 32);
266 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.ack.dst_wmd) == 16);
267 CLASSERT ((int)offsetof(lnet_hdr_t, msg.ack.match_bits) == 48);
268 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.ack.match_bits) == 8);
269 CLASSERT ((int)offsetof(lnet_hdr_t, msg.ack.mlength) == 56);
270 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.ack.mlength) == 4);
273 CLASSERT ((int)offsetof(lnet_hdr_t, msg.put.ack_wmd) == 32);
274 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.put.ack_wmd) == 16);
275 CLASSERT ((int)offsetof(lnet_hdr_t, msg.put.match_bits) == 48);
276 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.put.match_bits) == 8);
277 CLASSERT ((int)offsetof(lnet_hdr_t, msg.put.hdr_data) == 56);
278 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.put.hdr_data) == 8);
279 CLASSERT ((int)offsetof(lnet_hdr_t, msg.put.ptl_index) == 64);
280 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.put.ptl_index) == 4);
281 CLASSERT ((int)offsetof(lnet_hdr_t, msg.put.offset) == 68);
282 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.put.offset) == 4);
285 CLASSERT ((int)offsetof(lnet_hdr_t, msg.get.return_wmd) == 32);
286 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.get.return_wmd) == 16);
287 CLASSERT ((int)offsetof(lnet_hdr_t, msg.get.match_bits) == 48);
288 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.get.match_bits) == 8);
289 CLASSERT ((int)offsetof(lnet_hdr_t, msg.get.ptl_index) == 56);
290 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.get.ptl_index) == 4);
291 CLASSERT ((int)offsetof(lnet_hdr_t, msg.get.src_offset) == 60);
292 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.get.src_offset) == 4);
293 CLASSERT ((int)offsetof(lnet_hdr_t, msg.get.sink_length) == 64);
294 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.get.sink_length) == 4);
297 CLASSERT ((int)offsetof(lnet_hdr_t, msg.reply.dst_wmd) == 32);
298 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.reply.dst_wmd) == 16);
301 CLASSERT ((int)offsetof(lnet_hdr_t, msg.hello.incarnation) == 32);
302 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.hello.incarnation) == 8);
303 CLASSERT ((int)offsetof(lnet_hdr_t, msg.hello.type) == 40);
304 CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.hello.type) == 4);
308 lnet_find_lnd_by_type (int type)
313 /* holding lnd mutex */
314 cfs_list_for_each (tmp, &the_lnet.ln_lnds) {
315 lnd = cfs_list_entry(tmp, lnd_t, lnd_list);
317 if ((int)lnd->lnd_type == type)
325 lnet_register_lnd (lnd_t *lnd)
327 LNET_MUTEX_LOCK(&the_lnet.ln_lnd_mutex);
329 LASSERT (the_lnet.ln_init);
330 LASSERT (libcfs_isknown_lnd(lnd->lnd_type));
331 LASSERT (lnet_find_lnd_by_type(lnd->lnd_type) == NULL);
333 cfs_list_add_tail (&lnd->lnd_list, &the_lnet.ln_lnds);
334 lnd->lnd_refcount = 0;
336 CDEBUG(D_NET, "%s LND registered\n", libcfs_lnd2str(lnd->lnd_type));
338 LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
342 lnet_unregister_lnd (lnd_t *lnd)
344 LNET_MUTEX_LOCK(&the_lnet.ln_lnd_mutex);
346 LASSERT (the_lnet.ln_init);
347 LASSERT (lnet_find_lnd_by_type(lnd->lnd_type) == lnd);
348 LASSERT (lnd->lnd_refcount == 0);
350 cfs_list_del (&lnd->lnd_list);
351 CDEBUG(D_NET, "%s LND unregistered\n", libcfs_lnd2str(lnd->lnd_type));
353 LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
356 #ifdef LNET_USE_LIB_FREELIST
359 lnet_freelist_init (lnet_freelist_t *fl, int n, int size)
365 size += offsetof (lnet_freeobj_t, fo_contents);
367 LIBCFS_ALLOC(space, n * size);
371 CFS_INIT_LIST_HEAD (&fl->fl_list);
374 fl->fl_objsize = size;
378 memset (space, 0, size);
379 cfs_list_add ((cfs_list_t *)space, &fl->fl_list);
387 lnet_freelist_fini (lnet_freelist_t *fl)
392 if (fl->fl_nobjs == 0)
396 for (el = fl->fl_list.next; el != &fl->fl_list; el = el->next)
399 LASSERT (count == fl->fl_nobjs);
401 LIBCFS_FREE(fl->fl_objs, fl->fl_nobjs * fl->fl_objsize);
402 memset (fl, 0, sizeof (*fl));
405 #endif /* LNET_USE_LIB_FREELIST */
408 lnet_create_interface_cookie (void)
410 /* NB the interface cookie in wire handles guards against delayed
411 * replies and ACKs appearing valid after reboot. Initialisation time,
412 * even if it's only implemented to millisecond resolution is probably
413 * easily good enough. */
417 int rc = gettimeofday (&tv, NULL);
420 cfs_gettimeofday(&tv);
424 cookie += tv.tv_usec;
429 lnet_res_type2str(int type)
434 case LNET_COOKIE_TYPE_MD:
436 case LNET_COOKIE_TYPE_ME:
438 case LNET_COOKIE_TYPE_EQ:
444 lnet_res_container_cleanup(struct lnet_res_container *rec)
448 if (rec->rec_type == 0) /* not set yet, it's a uninitialized */
451 while (!cfs_list_empty(&rec->rec_active)) {
452 cfs_list_t *e = rec->rec_active.next;
454 cfs_list_del_init(e);
455 if (rec->rec_type == LNET_COOKIE_TYPE_EQ) {
456 lnet_eq_free(cfs_list_entry(e, lnet_eq_t, eq_list));
458 } else if (rec->rec_type == LNET_COOKIE_TYPE_MD) {
459 lnet_md_free(cfs_list_entry(e, lnet_libmd_t, md_list));
461 } else { /* NB: Active MEs should be attached on portals */
468 /* Found alive MD/ME/EQ, user really should unlink/free
469 * all of them before finalize LNet, but if someone didn't,
470 * we have to recycle garbage for him */
471 CERROR("%d active elements on exit of %s container\n",
472 count, lnet_res_type2str(rec->rec_type));
475 #ifdef LNET_USE_LIB_FREELIST
476 lnet_freelist_fini(&rec->rec_freelist);
478 if (rec->rec_lh_hash != NULL) {
479 LIBCFS_FREE(rec->rec_lh_hash,
480 LNET_LH_HASH_SIZE * sizeof(rec->rec_lh_hash[0]));
481 rec->rec_lh_hash = NULL;
484 rec->rec_type = 0; /* mark it as finalized */
488 lnet_res_container_setup(struct lnet_res_container *rec,
489 int type, int objnum, int objsz)
494 LASSERT(rec->rec_type == 0);
496 rec->rec_type = type;
497 CFS_INIT_LIST_HEAD(&rec->rec_active);
499 #ifdef LNET_USE_LIB_FREELIST
500 memset(&rec->rec_freelist, 0, sizeof(rec->rec_freelist));
501 rc = lnet_freelist_init(&rec->rec_freelist, objnum, objsz);
505 rec->rec_lh_cookie = type;
507 /* Arbitrary choice of hash table size */
508 LIBCFS_ALLOC(rec->rec_lh_hash,
509 LNET_LH_HASH_SIZE * sizeof(rec->rec_lh_hash[0]));
510 if (rec->rec_lh_hash == NULL) {
515 for (i = 0; i < LNET_LH_HASH_SIZE; i++)
516 CFS_INIT_LIST_HEAD(&rec->rec_lh_hash[i]);
521 CERROR("Failed to setup %s resource container\n",
522 lnet_res_type2str(type));
523 lnet_res_container_cleanup(rec);
528 lnet_res_lh_lookup(struct lnet_res_container *rec, __u64 cookie)
530 /* ALWAYS called with lnet_res_lock held */
532 lnet_libhandle_t *lh;
535 if ((cookie & (LNET_COOKIE_TYPES - 1)) != rec->rec_type)
538 hash = cookie >> LNET_COOKIE_TYPE_BITS;
539 head = &rec->rec_lh_hash[hash & LNET_LH_HASH_MASK];
541 cfs_list_for_each_entry(lh, head, lh_hash_chain) {
542 if (lh->lh_cookie == cookie)
550 lnet_res_lh_initialize(struct lnet_res_container *rec, lnet_libhandle_t *lh)
552 /* ALWAYS called with lnet_res_lock held */
553 unsigned int ibits = LNET_COOKIE_TYPE_BITS;
556 lh->lh_cookie = rec->rec_lh_cookie;
557 rec->rec_lh_cookie += 1 << ibits;
559 hash = (lh->lh_cookie >> ibits) & LNET_LH_HASH_MASK;
561 cfs_list_add(&lh->lh_hash_chain, &rec->rec_lh_hash[hash]);
566 * Reserved API - do not use.
567 * Temporary workaround to allow uOSS and test programs force server
568 * mode in userspace. See comments near ln_server_mode_flag in
569 * lnet/lib-types.h */
573 the_lnet.ln_server_mode_flag = 1;
578 lnet_prepare(lnet_pid_t requested_pid)
580 /* Prepare to bring up the network */
583 LASSERT (the_lnet.ln_refcount == 0);
585 the_lnet.ln_routing = 0;
588 LASSERT ((requested_pid & LNET_PID_USERFLAG) == 0);
589 the_lnet.ln_pid = requested_pid;
591 if (the_lnet.ln_server_mode_flag) {/* server case (uOSS) */
592 LASSERT ((requested_pid & LNET_PID_USERFLAG) == 0);
594 if (cfs_curproc_uid())/* Only root can run user-space server */
596 the_lnet.ln_pid = requested_pid;
598 } else {/* client case (liblustre) */
600 /* My PID must be unique on this node and flag I'm userspace */
601 the_lnet.ln_pid = getpid() | LNET_PID_USERFLAG;
605 memset(&the_lnet.ln_counters, 0,
606 sizeof(the_lnet.ln_counters));
608 CFS_INIT_LIST_HEAD (&the_lnet.ln_test_peers);
609 CFS_INIT_LIST_HEAD (&the_lnet.ln_nis);
610 CFS_INIT_LIST_HEAD (&the_lnet.ln_zombie_nis);
611 CFS_INIT_LIST_HEAD (&the_lnet.ln_remote_nets);
612 CFS_INIT_LIST_HEAD (&the_lnet.ln_routers);
614 the_lnet.ln_interface_cookie = lnet_create_interface_cookie();
616 lnet_init_rtrpools();
618 rc = lnet_peer_table_create();
622 /* NB: we will have instance of message container per CPT soon */
623 rc = lnet_msg_container_setup(&the_lnet.ln_msg_container);
627 rc = lnet_res_container_setup(&the_lnet.ln_eq_container,
628 LNET_COOKIE_TYPE_EQ, LNET_FL_MAX_EQS,
631 CERROR("Failed to create EQ container for LNet: %d\n", rc);
635 /* NB: we will have instance of ME container per CPT soon */
636 rc = lnet_res_container_setup(&the_lnet.ln_me_container,
637 LNET_COOKIE_TYPE_ME, LNET_FL_MAX_MES,
640 CERROR("Failed to create ME container for LNet: %d\n", rc);
644 /* NB: we will have instance of MD container per CPT soon */
645 rc = lnet_res_container_setup(&the_lnet.ln_md_container,
646 LNET_COOKIE_TYPE_MD, LNET_FL_MAX_MDS,
647 sizeof(lnet_libmd_t));
649 CERROR("Failed to create MD container for LNet: %d\n", rc);
653 rc = lnet_portals_create();
655 CERROR("Failed to create portals for LNet: %d\n", rc);
662 /* NB: lnet_res_container_cleanup is safe to call for
663 * uninitialized container */
664 lnet_res_container_cleanup(&the_lnet.ln_md_container);
665 lnet_res_container_cleanup(&the_lnet.ln_me_container);
666 lnet_res_container_cleanup(&the_lnet.ln_eq_container);
668 lnet_msg_container_cleanup(&the_lnet.ln_msg_container);
670 lnet_peer_table_destroy();
676 lnet_unprepare (void)
678 /* NB no LNET_LOCK since this is the last reference. All LND instances
679 * have shut down already, so it is safe to unlink and free all
680 * descriptors, even those that appear committed to a network op (eg MD
681 * with non-zero pending count) */
683 lnet_fail_nid(LNET_NID_ANY, 0);
685 LASSERT (cfs_list_empty(&the_lnet.ln_test_peers));
686 LASSERT (the_lnet.ln_refcount == 0);
687 LASSERT (cfs_list_empty(&the_lnet.ln_nis));
688 LASSERT (cfs_list_empty(&the_lnet.ln_zombie_nis));
689 LASSERT (the_lnet.ln_nzombie_nis == 0);
691 lnet_portals_destroy();
693 lnet_res_container_cleanup(&the_lnet.ln_md_container);
694 lnet_res_container_cleanup(&the_lnet.ln_me_container);
695 lnet_res_container_cleanup(&the_lnet.ln_eq_container);
697 lnet_free_rtrpools();
698 lnet_msg_container_cleanup(&the_lnet.ln_msg_container);
699 lnet_peer_table_destroy();
705 lnet_net2ni_locked (__u32 net)
710 cfs_list_for_each (tmp, &the_lnet.ln_nis) {
711 ni = cfs_list_entry(tmp, lnet_ni_t, ni_list);
713 if (LNET_NIDNET(ni->ni_nid) == net) {
714 lnet_ni_addref_locked(ni);
723 lnet_islocalnet (__u32 net)
728 ni = lnet_net2ni_locked(net);
730 lnet_ni_decref_locked(ni);
737 lnet_nid2ni_locked (lnet_nid_t nid)
742 cfs_list_for_each (tmp, &the_lnet.ln_nis) {
743 ni = cfs_list_entry(tmp, lnet_ni_t, ni_list);
745 if (ni->ni_nid == nid) {
746 lnet_ni_addref_locked(ni);
755 lnet_islocalnid (lnet_nid_t nid)
760 ni = lnet_nid2ni_locked(nid);
762 lnet_ni_decref_locked(ni);
769 lnet_count_acceptor_nis (void)
771 /* Return the # of NIs that need the acceptor. */
773 #if defined(__KERNEL__) || defined(HAVE_LIBPTHREAD)
778 cfs_list_for_each (tmp, &the_lnet.ln_nis) {
779 ni = cfs_list_entry(tmp, lnet_ni_t, ni_list);
781 if (ni->ni_lnd->lnd_accept != NULL)
787 #endif /* defined(__KERNEL__) || defined(HAVE_LIBPTHREAD) */
792 lnet_shutdown_lndnis (void)
798 /* NB called holding the global mutex */
800 /* All quiet on the API front */
801 LASSERT (!the_lnet.ln_shutdown);
802 LASSERT (the_lnet.ln_refcount == 0);
803 LASSERT (cfs_list_empty(&the_lnet.ln_zombie_nis));
804 LASSERT (the_lnet.ln_nzombie_nis == 0);
805 LASSERT (cfs_list_empty(&the_lnet.ln_remote_nets));
808 the_lnet.ln_shutdown = 1; /* flag shutdown */
810 /* Unlink NIs from the global table */
811 while (!cfs_list_empty(&the_lnet.ln_nis)) {
812 ni = cfs_list_entry(the_lnet.ln_nis.next,
814 cfs_list_del (&ni->ni_list);
816 the_lnet.ln_nzombie_nis++;
817 lnet_ni_decref_locked(ni); /* drop ln_nis' ref */
820 /* Drop the cached eqwait NI. */
821 if (the_lnet.ln_eq_waitni != NULL) {
822 lnet_ni_decref_locked(the_lnet.ln_eq_waitni);
823 the_lnet.ln_eq_waitni = NULL;
826 /* Drop the cached loopback NI. */
827 if (the_lnet.ln_loni != NULL) {
828 lnet_ni_decref_locked(the_lnet.ln_loni);
829 the_lnet.ln_loni = NULL;
834 /* Clear lazy portals and drop delayed messages which hold refs
835 * on their lnet_msg_t::msg_rxpeer */
836 for (i = 0; i < the_lnet.ln_nportals; i++)
837 LNetClearLazyPortal(i);
839 /* Clear the peer table and wait for all peers to go (they hold refs on
841 lnet_peer_table_cleanup();
844 /* Now wait for the NI's I just nuked to show up on ln_zombie_nis
845 * and shut them down in guaranteed thread context */
847 while (the_lnet.ln_nzombie_nis != 0) {
849 while (cfs_list_empty(&the_lnet.ln_zombie_nis)) {
853 CDEBUG(D_WARNING,"Waiting for %d zombie NIs\n",
854 the_lnet.ln_nzombie_nis);
855 cfs_pause(cfs_time_seconds(1));
859 ni = cfs_list_entry(the_lnet.ln_zombie_nis.next,
861 cfs_list_del(&ni->ni_list);
862 ni->ni_lnd->lnd_refcount--;
866 islo = ni->ni_lnd->lnd_type == LOLND;
868 LASSERT (!cfs_in_interrupt ());
869 (ni->ni_lnd->lnd_shutdown)(ni);
871 /* can't deref lnd anymore now; it might have unregistered
875 CDEBUG(D_LNI, "Removed LNI %s\n",
876 libcfs_nid2str(ni->ni_nid));
878 LIBCFS_FREE(ni, sizeof(*ni));
881 the_lnet.ln_nzombie_nis--;
884 the_lnet.ln_shutdown = 0;
887 if (the_lnet.ln_network_tokens != NULL) {
888 LIBCFS_FREE(the_lnet.ln_network_tokens,
889 the_lnet.ln_network_tokens_nob);
890 the_lnet.ln_network_tokens = NULL;
895 lnet_startup_lndnis (void)
903 char *nets = lnet_get_networks();
905 CFS_INIT_LIST_HEAD(&nilist);
910 rc = lnet_parse_networks(&nilist, nets);
914 while (!cfs_list_empty(&nilist)) {
915 ni = cfs_list_entry(nilist.next, lnet_ni_t, ni_list);
916 lnd_type = LNET_NETTYP(LNET_NIDNET(ni->ni_nid));
918 LASSERT (libcfs_isknown_lnd(lnd_type));
920 if (lnd_type == CIBLND ||
921 lnd_type == OPENIBLND ||
922 lnd_type == IIBLND ||
923 lnd_type == VIBLND) {
924 CERROR("LND %s obsoleted\n",
925 libcfs_lnd2str(lnd_type));
929 LNET_MUTEX_LOCK(&the_lnet.ln_lnd_mutex);
930 lnd = lnet_find_lnd_by_type(lnd_type);
934 LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
935 rc = cfs_request_module("%s",
936 libcfs_lnd2modname(lnd_type));
937 LNET_MUTEX_LOCK(&the_lnet.ln_lnd_mutex);
939 lnd = lnet_find_lnd_by_type(lnd_type);
941 LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
942 CERROR("Can't load LND %s, module %s, rc=%d\n",
943 libcfs_lnd2str(lnd_type),
944 libcfs_lnd2modname(lnd_type), rc);
945 #ifndef HAVE_MODULE_LOADING_SUPPORT
946 LCONSOLE_ERROR_MSG(0x104, "Your kernel must be "
947 "compiled with kernel module "
955 LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
956 CERROR("LND %s not supported\n",
957 libcfs_lnd2str(lnd_type));
970 rc = (lnd->lnd_startup)(ni);
972 LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
975 LCONSOLE_ERROR_MSG(0x105, "Error %d starting up LNI %s"
977 rc, libcfs_lnd2str(lnd->lnd_type));
984 LASSERT (ni->ni_peertimeout <= 0 || lnd->lnd_query != NULL);
986 cfs_list_del(&ni->ni_list);
989 cfs_list_add_tail(&ni->ni_list, &the_lnet.ln_nis);
992 if (lnd->lnd_type == LOLND) {
994 LASSERT (the_lnet.ln_loni == NULL);
995 the_lnet.ln_loni = ni;
1000 if (lnd->lnd_wait != NULL) {
1001 if (the_lnet.ln_eq_waitni == NULL) {
1003 the_lnet.ln_eq_waitni = ni;
1006 # ifndef HAVE_LIBPTHREAD
1007 LCONSOLE_ERROR_MSG(0x106, "LND %s not supported in a "
1008 "single-threaded runtime\n",
1009 libcfs_lnd2str(lnd_type));
1014 if (ni->ni_peertxcredits == 0 ||
1015 ni->ni_maxtxcredits == 0) {
1016 LCONSOLE_ERROR_MSG(0x107, "LNI %s has no %scredits\n",
1017 libcfs_lnd2str(lnd->lnd_type),
1018 ni->ni_peertxcredits == 0 ?
1023 ni->ni_txcredits = ni->ni_mintxcredits = ni->ni_maxtxcredits;
1025 CDEBUG(D_LNI, "Added LNI %s [%d/%d/%d/%d]\n",
1026 libcfs_nid2str(ni->ni_nid),
1027 ni->ni_peertxcredits, ni->ni_txcredits,
1028 ni->ni_peerrtrcredits, ni->ni_peertimeout);
1033 if (the_lnet.ln_eq_waitni != NULL && nicount > 1) {
1034 lnd_type = the_lnet.ln_eq_waitni->ni_lnd->lnd_type;
1035 LCONSOLE_ERROR_MSG(0x109, "LND %s can only run single-network"
1037 libcfs_lnd2str(lnd_type));
1044 lnet_shutdown_lndnis();
1046 while (!cfs_list_empty(&nilist)) {
1047 ni = cfs_list_entry(nilist.next, lnet_ni_t, ni_list);
1048 cfs_list_del(&ni->ni_list);
1049 LIBCFS_FREE(ni, sizeof(*ni));
1056 * Initialize LNet library.
1058 * Only userspace program needs to call this function - it's automatically
1059 * called in the kernel at module loading time. Caller has to call LNetFini()
1060 * after a call to LNetInit(), if and only if the latter returned 0. It must
1061 * be called exactly once.
1063 * \return 0 on success, and -ve on failures.
1068 lnet_assert_wire_constants ();
1069 LASSERT (!the_lnet.ln_init);
1071 memset(&the_lnet, 0, sizeof(the_lnet));
1074 the_lnet.ln_refcount = 0;
1075 the_lnet.ln_init = 1;
1076 LNetInvalidateHandle(&the_lnet.ln_rc_eqh);
1077 CFS_INIT_LIST_HEAD(&the_lnet.ln_lnds);
1078 CFS_INIT_LIST_HEAD(&the_lnet.ln_rcd_zombie);
1079 CFS_INIT_LIST_HEAD(&the_lnet.ln_rcd_deathrow);
1082 /* All LNDs apart from the LOLND are in separate modules. They
1083 * register themselves when their module loads, and unregister
1084 * themselves when their module is unloaded. */
1087 * NB the order here determines default 'networks=' order */
1089 LNET_REGISTER_ULND(the_ptllnd);
1091 # ifdef HAVE_LIBPTHREAD
1092 LNET_REGISTER_ULND(the_tcplnd);
1095 lnet_register_lnd(&the_lolnd);
1100 * Finalize LNet library.
1102 * Only userspace program needs to call this function. It can be called
1105 * \pre LNetInit() called with success.
1106 * \pre All LNet users called LNetNIFini() for matching LNetNIInit() calls.
1111 LASSERT (the_lnet.ln_init);
1112 LASSERT (the_lnet.ln_refcount == 0);
1114 while (!cfs_list_empty(&the_lnet.ln_lnds))
1115 lnet_unregister_lnd(cfs_list_entry(the_lnet.ln_lnds.next,
1119 the_lnet.ln_init = 0;
1123 * Set LNet PID and start LNet interfaces, routing, and forwarding.
1125 * Userspace program should call this after a successful call to LNetInit().
1126 * Users must call this function at least once before any other functions.
1127 * For each successful call there must be a corresponding call to
1128 * LNetNIFini(). For subsequent calls to LNetNIInit(), \a requested_pid is
1131 * The PID used by LNet may be different from the one requested.
1134 * \param requested_pid PID requested by the caller.
1136 * \return >= 0 on success, and < 0 error code on failures.
1139 LNetNIInit(lnet_pid_t requested_pid)
1141 int im_a_router = 0;
1144 LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
1146 LASSERT (the_lnet.ln_init);
1147 CDEBUG(D_OTHER, "refs %d\n", the_lnet.ln_refcount);
1149 if (the_lnet.ln_refcount > 0) {
1150 rc = the_lnet.ln_refcount++;
1154 lnet_get_tunables();
1156 if (requested_pid == LNET_PID_ANY) {
1157 /* Don't instantiate LNET just for me */
1162 rc = lnet_prepare(requested_pid);
1166 rc = lnet_startup_lndnis();
1170 rc = lnet_parse_routes(lnet_get_routes(), &im_a_router);
1174 rc = lnet_check_routes();
1178 rc = lnet_alloc_rtrpools(im_a_router);
1182 rc = lnet_acceptor_start();
1186 the_lnet.ln_refcount = 1;
1187 /* Now I may use my own API functions... */
1189 /* NB router checker needs the_lnet.ln_ping_info in
1190 * lnet_router_checker -> lnet_update_ni_status_locked */
1191 rc = lnet_ping_target_init();
1195 rc = lnet_router_checker_start();
1203 lnet_ping_target_fini();
1205 the_lnet.ln_refcount = 0;
1206 lnet_acceptor_stop();
1208 lnet_destroy_routes();
1209 lnet_shutdown_lndnis();
1215 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
1220 * Stop LNet interfaces, routing, and forwarding.
1222 * Users must call this function once for each successful call to LNetNIInit().
1223 * Once the LNetNIFini() operation has been started, the results of pending
1224 * API operations are undefined.
1226 * \return always 0 for current implementation.
1231 LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
1233 LASSERT (the_lnet.ln_init);
1234 LASSERT (the_lnet.ln_refcount > 0);
1236 if (the_lnet.ln_refcount != 1) {
1237 the_lnet.ln_refcount--;
1239 LASSERT (!the_lnet.ln_niinit_self);
1242 lnet_router_checker_stop();
1243 lnet_ping_target_fini();
1245 /* Teardown fns that use my own API functions BEFORE here */
1246 the_lnet.ln_refcount = 0;
1248 lnet_acceptor_stop();
1249 lnet_destroy_routes();
1250 lnet_shutdown_lndnis();
1254 LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
1259 * This is an ugly hack to export IOC_LIBCFS_DEBUG_PEER and
1260 * IOC_LIBCFS_PORTALS_COMPATIBILITY commands to users, by tweaking the LNet
1261 * internal ioctl handler.
1263 * IOC_LIBCFS_PORTALS_COMPATIBILITY is now deprecated, don't use it.
1265 * \param cmd IOC_LIBCFS_DEBUG_PEER to print debugging data about a peer.
1266 * The data will be printed to system console. Don't use it excessively.
1267 * \param arg A pointer to lnet_process_id_t, process ID of the peer.
1269 * \return Always return 0 when called by users directly (i.e., not via ioctl).
1272 LNetCtl(unsigned int cmd, void *arg)
1274 struct libcfs_ioctl_data *data = arg;
1275 lnet_process_id_t id = {0};
1279 LASSERT (the_lnet.ln_init);
1280 LASSERT (the_lnet.ln_refcount > 0);
1283 case IOC_LIBCFS_GET_NI:
1284 rc = LNetGetId(data->ioc_count, &id);
1285 data->ioc_nid = id.nid;
1288 case IOC_LIBCFS_FAIL_NID:
1289 return lnet_fail_nid(data->ioc_nid, data->ioc_count);
1291 case IOC_LIBCFS_ADD_ROUTE:
1292 rc = lnet_add_route(data->ioc_net, data->ioc_count,
1294 return (rc != 0) ? rc : lnet_check_routes();
1296 case IOC_LIBCFS_DEL_ROUTE:
1297 return lnet_del_route(data->ioc_net, data->ioc_nid);
1299 case IOC_LIBCFS_GET_ROUTE:
1300 return lnet_get_route(data->ioc_count,
1301 &data->ioc_net, &data->ioc_count,
1302 &data->ioc_nid, &data->ioc_flags);
1303 case IOC_LIBCFS_NOTIFY_ROUTER:
1304 return lnet_notify(NULL, data->ioc_nid, data->ioc_flags,
1305 cfs_time_current() -
1306 cfs_time_seconds(cfs_time_current_sec() -
1307 (time_t)data->ioc_u64[0]));
1309 case IOC_LIBCFS_PORTALS_COMPATIBILITY:
1310 /* This can be removed once lustre stops calling it */
1313 case IOC_LIBCFS_LNET_DIST:
1314 rc = LNetDist(data->ioc_nid, &data->ioc_nid, &data->ioc_u32[1]);
1315 if (rc < 0 && rc != -EHOSTUNREACH)
1318 data->ioc_u32[0] = rc;
1321 case IOC_LIBCFS_TESTPROTOCOMPAT:
1323 the_lnet.ln_testprotocompat = data->ioc_flags;
1327 case IOC_LIBCFS_PING:
1328 id.nid = data->ioc_nid;
1329 id.pid = data->ioc_u32[0];
1330 rc = lnet_ping(id, data->ioc_u32[1], /* timeout */
1331 (lnet_process_id_t *)data->ioc_pbuf1,
1332 data->ioc_plen1/sizeof(lnet_process_id_t));
1335 data->ioc_count = rc;
1338 case IOC_LIBCFS_DEBUG_PEER: {
1339 /* CAVEAT EMPTOR: this one designed for calling directly; not
1341 id = *((lnet_process_id_t *) arg);
1343 lnet_debug_peer(id.nid);
1345 ni = lnet_net2ni(LNET_NIDNET(id.nid));
1347 CDEBUG(D_WARNING, "No NI for %s\n", libcfs_id2str(id));
1349 if (ni->ni_lnd->lnd_ctl == NULL) {
1350 CDEBUG(D_WARNING, "No ctl for %s\n",
1353 (void)ni->ni_lnd->lnd_ctl(ni, cmd, arg);
1362 ni = lnet_net2ni(data->ioc_net);
1366 if (ni->ni_lnd->lnd_ctl == NULL)
1369 rc = ni->ni_lnd->lnd_ctl(ni, cmd, arg);
1378 * Retrieve the lnet_process_id_t ID of LNet interface at \a index. Note that
1379 * all interfaces share a same PID, as requested by LNetNIInit().
1381 * \param index Index of the interface to look up.
1382 * \param id On successful return, this location will hold the
1383 * lnet_process_id_t ID of the interface.
1385 * \retval 0 If an interface exists at \a index.
1386 * \retval -ENOENT If no interface has been found.
1389 LNetGetId(unsigned int index, lnet_process_id_t *id)
1395 LASSERT (the_lnet.ln_init);
1396 LASSERT (the_lnet.ln_refcount > 0);
1400 cfs_list_for_each(tmp, &the_lnet.ln_nis) {
1404 ni = cfs_list_entry(tmp, lnet_ni_t, ni_list);
1406 id->nid = ni->ni_nid;
1407 id->pid = the_lnet.ln_pid;
1418 * Print a string representation of handle \a h into buffer \a str of
1422 LNetSnprintHandle(char *str, int len, lnet_handle_any_t h)
1424 snprintf(str, len, LPX64, h.cookie);
1428 lnet_create_ping_info(void)
1433 unsigned int infosz;
1435 lnet_process_id_t id;
1436 lnet_ping_info_t *pinfo;
1438 for (n = 0; ; n++) {
1439 rc = LNetGetId(n, &id);
1446 infosz = offsetof(lnet_ping_info_t, pi_ni[n]);
1447 LIBCFS_ALLOC(pinfo, infosz);
1448 if (pinfo == NULL) {
1449 CERROR("Can't allocate ping info[%d]\n", n);
1454 pinfo->pi_pid = the_lnet.ln_pid;
1455 pinfo->pi_magic = LNET_PROTO_PING_MAGIC;
1456 pinfo->pi_version = LNET_PROTO_PING_VERSION;
1458 for (i = 0; i < n; i++) {
1459 lnet_ni_status_t *ns = &pinfo->pi_ni[i];
1461 rc = LNetGetId(i, &id);
1464 ns->ns_nid = id.nid;
1465 ns->ns_status = LNET_NI_STATUS_UP;
1469 ni = lnet_nid2ni_locked(id.nid);
1470 LASSERT (ni != NULL);
1471 LASSERT (ni->ni_status == NULL);
1473 lnet_ni_decref_locked(ni);
1478 the_lnet.ln_ping_info = pinfo;
1483 lnet_destroy_ping_info(void)
1489 cfs_list_for_each_entry (ni, &the_lnet.ln_nis, ni_list) {
1490 ni->ni_status = NULL;
1495 LIBCFS_FREE(the_lnet.ln_ping_info,
1496 offsetof(lnet_ping_info_t,
1497 pi_ni[the_lnet.ln_ping_info->pi_nnis]));
1498 the_lnet.ln_ping_info = NULL;
1503 lnet_ping_target_init(void)
1506 lnet_handle_me_t meh;
1507 lnet_process_id_t id;
1512 rc = lnet_create_ping_info();
1516 /* We can have a tiny EQ since we only need to see the unlink event on
1517 * teardown, which by definition is the last one! */
1518 rc = LNetEQAlloc(2, LNET_EQ_HANDLER_NONE, &the_lnet.ln_ping_target_eq);
1520 CERROR("Can't allocate ping EQ: %d\n", rc);
1524 memset(&id, 0, sizeof(lnet_process_id_t));
1525 id.nid = LNET_NID_ANY;
1526 id.pid = LNET_PID_ANY;
1528 rc = LNetMEAttach(LNET_RESERVED_PORTAL, id,
1529 LNET_PROTO_PING_MATCHBITS, 0,
1530 LNET_UNLINK, LNET_INS_AFTER,
1533 CERROR("Can't create ping ME: %d\n", rc);
1537 /* initialize md content */
1538 infosz = offsetof(lnet_ping_info_t,
1539 pi_ni[the_lnet.ln_ping_info->pi_nnis]);
1540 md.start = the_lnet.ln_ping_info;
1542 md.threshold = LNET_MD_THRESH_INF;
1544 md.options = LNET_MD_OP_GET | LNET_MD_TRUNCATE |
1545 LNET_MD_MANAGE_REMOTE;
1547 md.eq_handle = the_lnet.ln_ping_target_eq;
1549 rc = LNetMDAttach(meh, md,
1551 &the_lnet.ln_ping_target_md);
1553 CERROR("Can't attach ping MD: %d\n", rc);
1560 rc2 = LNetMEUnlink(meh);
1563 rc2 = LNetEQFree(the_lnet.ln_ping_target_eq);
1566 lnet_destroy_ping_info();
1571 lnet_ping_target_fini(void)
1576 int timeout_ms = 1000;
1577 cfs_sigset_t blocked = cfs_block_allsigs();
1579 LNetMDUnlink(the_lnet.ln_ping_target_md);
1580 /* NB md could be busy; this just starts the unlink */
1583 rc = LNetEQPoll(&the_lnet.ln_ping_target_eq, 1,
1584 timeout_ms, &event, &which);
1586 /* I expect overflow... */
1587 LASSERT (rc >= 0 || rc == -EOVERFLOW);
1590 /* timed out: provide a diagnostic */
1591 CWARN("Still waiting for ping MD to unlink\n");
1596 /* Got a valid event */
1601 rc = LNetEQFree(the_lnet.ln_ping_target_eq);
1603 lnet_destroy_ping_info();
1604 cfs_restore_sigs(blocked);
1608 lnet_ping (lnet_process_id_t id, int timeout_ms, lnet_process_id_t *ids, int n_ids)
1610 lnet_handle_eq_t eqh;
1611 lnet_handle_md_t mdh;
1617 const int a_long_time = 60000; /* mS */
1618 int infosz = offsetof(lnet_ping_info_t, pi_ni[n_ids]);
1619 lnet_ping_info_t *info;
1620 lnet_process_id_t tmpid;
1625 cfs_sigset_t blocked;
1628 id.nid == LNET_NID_ANY ||
1629 timeout_ms > 500000 || /* arbitrary limit! */
1630 n_ids > 20) /* arbitrary limit! */
1633 if (id.pid == LNET_PID_ANY)
1634 id.pid = LUSTRE_SRV_LNET_PID;
1636 LIBCFS_ALLOC(info, infosz);
1640 /* NB 2 events max (including any unlink event) */
1641 rc = LNetEQAlloc(2, LNET_EQ_HANDLER_NONE, &eqh);
1643 CERROR("Can't allocate EQ: %d\n", rc);
1647 /* initialize md content */
1650 md.threshold = 2; /*GET/REPLY*/
1652 md.options = LNET_MD_TRUNCATE;
1656 rc = LNetMDBind(md, LNET_UNLINK, &mdh);
1658 CERROR("Can't bind MD: %d\n", rc);
1662 rc = LNetGet(LNET_NID_ANY, mdh, id,
1663 LNET_RESERVED_PORTAL,
1664 LNET_PROTO_PING_MATCHBITS, 0);
1667 /* Don't CERROR; this could be deliberate! */
1669 rc2 = LNetMDUnlink(mdh);
1672 /* NB must wait for the UNLINK event below... */
1674 timeout_ms = a_long_time;
1678 /* MUST block for unlink to complete */
1680 blocked = cfs_block_allsigs();
1682 rc2 = LNetEQPoll(&eqh, 1, timeout_ms, &event, &which);
1685 cfs_restore_sigs(blocked);
1687 CDEBUG(D_NET, "poll %d(%d %d)%s\n", rc2,
1688 (rc2 <= 0) ? -1 : event.type,
1689 (rc2 <= 0) ? -1 : event.status,
1690 (rc2 > 0 && event.unlinked) ? " unlinked" : "");
1692 LASSERT (rc2 != -EOVERFLOW); /* can't miss anything */
1694 if (rc2 <= 0 || event.status != 0) {
1695 /* timeout or error */
1696 if (!replied && rc == 0)
1697 rc = (rc2 < 0) ? rc2 :
1698 (rc2 == 0) ? -ETIMEDOUT :
1702 /* Ensure completion in finite time... */
1704 /* No assertion (racing with network) */
1706 timeout_ms = a_long_time;
1707 } else if (rc2 == 0) {
1708 /* timed out waiting for unlink */
1709 CWARN("ping %s: late network completion\n",
1712 } else if (event.type == LNET_EVENT_REPLY) {
1717 } while (rc2 <= 0 || !event.unlinked);
1721 CWARN("%s: Unexpected rc >= 0 but no reply!\n",
1728 LASSERT (nob >= 0 && nob <= infosz);
1730 rc = -EPROTO; /* if I can't parse... */
1733 /* can't check magic/version */
1734 CERROR("%s: ping info too short %d\n",
1735 libcfs_id2str(id), nob);
1739 if (info->pi_magic == __swab32(LNET_PROTO_PING_MAGIC)) {
1740 lnet_swap_pinginfo(info);
1741 } else if (info->pi_magic != LNET_PROTO_PING_MAGIC) {
1742 CERROR("%s: Unexpected magic %08x\n",
1743 libcfs_id2str(id), info->pi_magic);
1747 if (info->pi_version != LNET_PROTO_PING_VERSION) {
1748 CERROR("%s: Unexpected version 0x%x\n",
1749 libcfs_id2str(id), info->pi_version);
1753 if (nob < offsetof(lnet_ping_info_t, pi_ni[0])) {
1754 CERROR("%s: Short reply %d(%d min)\n", libcfs_id2str(id),
1755 nob, (int)offsetof(lnet_ping_info_t, pi_ni[0]));
1759 if (info->pi_nnis < n_ids)
1760 n_ids = info->pi_nnis;
1762 if (nob < offsetof(lnet_ping_info_t, pi_ni[n_ids])) {
1763 CERROR("%s: Short reply %d(%d expected)\n", libcfs_id2str(id),
1764 nob, (int)offsetof(lnet_ping_info_t, pi_ni[n_ids]));
1768 rc = -EFAULT; /* If I SEGV... */
1770 for (i = 0; i < n_ids; i++) {
1771 tmpid.pid = info->pi_pid;
1772 tmpid.nid = info->pi_ni[i].ns_nid;
1774 if (cfs_copy_to_user(&ids[i], &tmpid, sizeof(tmpid)))
1783 rc2 = LNetEQFree(eqh);
1785 CERROR("rc2 %d\n", rc2);
1789 LIBCFS_FREE(info, infosz);