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33#define DEBUG_SUBSYSTEM S_LNET
34#include <linux/log2.h>
35#include <linux/ktime.h>
36
37#include "../../include/linux/lnet/lib-lnet.h"
38#include "../../include/linux/lnet/lib-dlc.h"
39
40#define D_LNI D_CONSOLE
41
42lnet_t the_lnet;
43EXPORT_SYMBOL(the_lnet);
44
45static char *ip2nets = "";
46module_param(ip2nets, charp, 0444);
47MODULE_PARM_DESC(ip2nets, "LNET network <- IP table");
48
49static char *networks = "";
50module_param(networks, charp, 0444);
51MODULE_PARM_DESC(networks, "local networks");
52
53static char *routes = "";
54module_param(routes, charp, 0444);
55MODULE_PARM_DESC(routes, "routes to non-local networks");
56
57static int rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT;
58module_param(rnet_htable_size, int, 0444);
59MODULE_PARM_DESC(rnet_htable_size, "size of remote network hash table");
60
61static int lnet_ping(lnet_process_id_t id, int timeout_ms,
62 lnet_process_id_t __user *ids, int n_ids);
63
64static char *
65lnet_get_routes(void)
66{
67 return routes;
68}
69
70static char *
71lnet_get_networks(void)
72{
73 char *nets;
74 int rc;
75
76 if (*networks && *ip2nets) {
77 LCONSOLE_ERROR_MSG(0x101, "Please specify EITHER 'networks' or 'ip2nets' but not both at once\n");
78 return NULL;
79 }
80
81 if (*ip2nets) {
82 rc = lnet_parse_ip2nets(&nets, ip2nets);
83 return !rc ? nets : NULL;
84 }
85
86 if (*networks)
87 return networks;
88
89 return "tcp";
90}
91
92static void
93lnet_init_locks(void)
94{
95 spin_lock_init(&the_lnet.ln_eq_wait_lock);
96 init_waitqueue_head(&the_lnet.ln_eq_waitq);
97 init_waitqueue_head(&the_lnet.ln_rc_waitq);
98 mutex_init(&the_lnet.ln_lnd_mutex);
99 mutex_init(&the_lnet.ln_api_mutex);
100}
101
102static int
103lnet_create_remote_nets_table(void)
104{
105 int i;
106 struct list_head *hash;
107
108 LASSERT(!the_lnet.ln_remote_nets_hash);
109 LASSERT(the_lnet.ln_remote_nets_hbits > 0);
110 LIBCFS_ALLOC(hash, LNET_REMOTE_NETS_HASH_SIZE * sizeof(*hash));
111 if (!hash) {
112 CERROR("Failed to create remote nets hash table\n");
113 return -ENOMEM;
114 }
115
116 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++)
117 INIT_LIST_HEAD(&hash[i]);
118 the_lnet.ln_remote_nets_hash = hash;
119 return 0;
120}
121
122static void
123lnet_destroy_remote_nets_table(void)
124{
125 int i;
126
127 if (!the_lnet.ln_remote_nets_hash)
128 return;
129
130 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++)
131 LASSERT(list_empty(&the_lnet.ln_remote_nets_hash[i]));
132
133 LIBCFS_FREE(the_lnet.ln_remote_nets_hash,
134 LNET_REMOTE_NETS_HASH_SIZE *
135 sizeof(the_lnet.ln_remote_nets_hash[0]));
136 the_lnet.ln_remote_nets_hash = NULL;
137}
138
139static void
140lnet_destroy_locks(void)
141{
142 if (the_lnet.ln_res_lock) {
143 cfs_percpt_lock_free(the_lnet.ln_res_lock);
144 the_lnet.ln_res_lock = NULL;
145 }
146
147 if (the_lnet.ln_net_lock) {
148 cfs_percpt_lock_free(the_lnet.ln_net_lock);
149 the_lnet.ln_net_lock = NULL;
150 }
151}
152
153static int
154lnet_create_locks(void)
155{
156 lnet_init_locks();
157
158 the_lnet.ln_res_lock = cfs_percpt_lock_alloc(lnet_cpt_table());
159 if (!the_lnet.ln_res_lock)
160 goto failed;
161
162 the_lnet.ln_net_lock = cfs_percpt_lock_alloc(lnet_cpt_table());
163 if (!the_lnet.ln_net_lock)
164 goto failed;
165
166 return 0;
167
168 failed:
169 lnet_destroy_locks();
170 return -ENOMEM;
171}
172
173static void lnet_assert_wire_constants(void)
174{
175
176
177
178
179
180
181
182
183 CLASSERT(LNET_PROTO_TCP_MAGIC == 0xeebc0ded);
184 CLASSERT(LNET_PROTO_TCP_VERSION_MAJOR == 1);
185 CLASSERT(LNET_PROTO_TCP_VERSION_MINOR == 0);
186 CLASSERT(LNET_MSG_ACK == 0);
187 CLASSERT(LNET_MSG_PUT == 1);
188 CLASSERT(LNET_MSG_GET == 2);
189 CLASSERT(LNET_MSG_REPLY == 3);
190 CLASSERT(LNET_MSG_HELLO == 4);
191
192
193 CLASSERT((int)sizeof(lnet_handle_wire_t) == 16);
194 CLASSERT((int)offsetof(lnet_handle_wire_t, wh_interface_cookie) == 0);
195 CLASSERT((int)sizeof(((lnet_handle_wire_t *)0)->wh_interface_cookie) == 8);
196 CLASSERT((int)offsetof(lnet_handle_wire_t, wh_object_cookie) == 8);
197 CLASSERT((int)sizeof(((lnet_handle_wire_t *)0)->wh_object_cookie) == 8);
198
199
200 CLASSERT((int)sizeof(lnet_magicversion_t) == 8);
201 CLASSERT((int)offsetof(lnet_magicversion_t, magic) == 0);
202 CLASSERT((int)sizeof(((lnet_magicversion_t *)0)->magic) == 4);
203 CLASSERT((int)offsetof(lnet_magicversion_t, version_major) == 4);
204 CLASSERT((int)sizeof(((lnet_magicversion_t *)0)->version_major) == 2);
205 CLASSERT((int)offsetof(lnet_magicversion_t, version_minor) == 6);
206 CLASSERT((int)sizeof(((lnet_magicversion_t *)0)->version_minor) == 2);
207
208
209 CLASSERT((int)sizeof(lnet_hdr_t) == 72);
210 CLASSERT((int)offsetof(lnet_hdr_t, dest_nid) == 0);
211 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->dest_nid) == 8);
212 CLASSERT((int)offsetof(lnet_hdr_t, src_nid) == 8);
213 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->src_nid) == 8);
214 CLASSERT((int)offsetof(lnet_hdr_t, dest_pid) == 16);
215 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->dest_pid) == 4);
216 CLASSERT((int)offsetof(lnet_hdr_t, src_pid) == 20);
217 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->src_pid) == 4);
218 CLASSERT((int)offsetof(lnet_hdr_t, type) == 24);
219 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->type) == 4);
220 CLASSERT((int)offsetof(lnet_hdr_t, payload_length) == 28);
221 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->payload_length) == 4);
222 CLASSERT((int)offsetof(lnet_hdr_t, msg) == 32);
223 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg) == 40);
224
225
226 CLASSERT((int)offsetof(lnet_hdr_t, msg.ack.dst_wmd) == 32);
227 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.ack.dst_wmd) == 16);
228 CLASSERT((int)offsetof(lnet_hdr_t, msg.ack.match_bits) == 48);
229 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.ack.match_bits) == 8);
230 CLASSERT((int)offsetof(lnet_hdr_t, msg.ack.mlength) == 56);
231 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.ack.mlength) == 4);
232
233
234 CLASSERT((int)offsetof(lnet_hdr_t, msg.put.ack_wmd) == 32);
235 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.put.ack_wmd) == 16);
236 CLASSERT((int)offsetof(lnet_hdr_t, msg.put.match_bits) == 48);
237 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.put.match_bits) == 8);
238 CLASSERT((int)offsetof(lnet_hdr_t, msg.put.hdr_data) == 56);
239 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.put.hdr_data) == 8);
240 CLASSERT((int)offsetof(lnet_hdr_t, msg.put.ptl_index) == 64);
241 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.put.ptl_index) == 4);
242 CLASSERT((int)offsetof(lnet_hdr_t, msg.put.offset) == 68);
243 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.put.offset) == 4);
244
245
246 CLASSERT((int)offsetof(lnet_hdr_t, msg.get.return_wmd) == 32);
247 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.get.return_wmd) == 16);
248 CLASSERT((int)offsetof(lnet_hdr_t, msg.get.match_bits) == 48);
249 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.get.match_bits) == 8);
250 CLASSERT((int)offsetof(lnet_hdr_t, msg.get.ptl_index) == 56);
251 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.get.ptl_index) == 4);
252 CLASSERT((int)offsetof(lnet_hdr_t, msg.get.src_offset) == 60);
253 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.get.src_offset) == 4);
254 CLASSERT((int)offsetof(lnet_hdr_t, msg.get.sink_length) == 64);
255 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.get.sink_length) == 4);
256
257
258 CLASSERT((int)offsetof(lnet_hdr_t, msg.reply.dst_wmd) == 32);
259 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.reply.dst_wmd) == 16);
260
261
262 CLASSERT((int)offsetof(lnet_hdr_t, msg.hello.incarnation) == 32);
263 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.hello.incarnation) == 8);
264 CLASSERT((int)offsetof(lnet_hdr_t, msg.hello.type) == 40);
265 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.hello.type) == 4);
266}
267
268static lnd_t *
269lnet_find_lnd_by_type(__u32 type)
270{
271 lnd_t *lnd;
272 struct list_head *tmp;
273
274
275 list_for_each(tmp, &the_lnet.ln_lnds) {
276 lnd = list_entry(tmp, lnd_t, lnd_list);
277
278 if (lnd->lnd_type == type)
279 return lnd;
280 }
281
282 return NULL;
283}
284
285void
286lnet_register_lnd(lnd_t *lnd)
287{
288 mutex_lock(&the_lnet.ln_lnd_mutex);
289
290 LASSERT(libcfs_isknown_lnd(lnd->lnd_type));
291 LASSERT(!lnet_find_lnd_by_type(lnd->lnd_type));
292
293 list_add_tail(&lnd->lnd_list, &the_lnet.ln_lnds);
294 lnd->lnd_refcount = 0;
295
296 CDEBUG(D_NET, "%s LND registered\n", libcfs_lnd2str(lnd->lnd_type));
297
298 mutex_unlock(&the_lnet.ln_lnd_mutex);
299}
300EXPORT_SYMBOL(lnet_register_lnd);
301
302void
303lnet_unregister_lnd(lnd_t *lnd)
304{
305 mutex_lock(&the_lnet.ln_lnd_mutex);
306
307 LASSERT(lnet_find_lnd_by_type(lnd->lnd_type) == lnd);
308 LASSERT(!lnd->lnd_refcount);
309
310 list_del(&lnd->lnd_list);
311 CDEBUG(D_NET, "%s LND unregistered\n", libcfs_lnd2str(lnd->lnd_type));
312
313 mutex_unlock(&the_lnet.ln_lnd_mutex);
314}
315EXPORT_SYMBOL(lnet_unregister_lnd);
316
317void
318lnet_counters_get(lnet_counters_t *counters)
319{
320 lnet_counters_t *ctr;
321 int i;
322
323 memset(counters, 0, sizeof(*counters));
324
325 lnet_net_lock(LNET_LOCK_EX);
326
327 cfs_percpt_for_each(ctr, i, the_lnet.ln_counters) {
328 counters->msgs_max += ctr->msgs_max;
329 counters->msgs_alloc += ctr->msgs_alloc;
330 counters->errors += ctr->errors;
331 counters->send_count += ctr->send_count;
332 counters->recv_count += ctr->recv_count;
333 counters->route_count += ctr->route_count;
334 counters->drop_count += ctr->drop_count;
335 counters->send_length += ctr->send_length;
336 counters->recv_length += ctr->recv_length;
337 counters->route_length += ctr->route_length;
338 counters->drop_length += ctr->drop_length;
339 }
340 lnet_net_unlock(LNET_LOCK_EX);
341}
342EXPORT_SYMBOL(lnet_counters_get);
343
344void
345lnet_counters_reset(void)
346{
347 lnet_counters_t *counters;
348 int i;
349
350 lnet_net_lock(LNET_LOCK_EX);
351
352 cfs_percpt_for_each(counters, i, the_lnet.ln_counters)
353 memset(counters, 0, sizeof(lnet_counters_t));
354
355 lnet_net_unlock(LNET_LOCK_EX);
356}
357
358static char *
359lnet_res_type2str(int type)
360{
361 switch (type) {
362 default:
363 LBUG();
364 case LNET_COOKIE_TYPE_MD:
365 return "MD";
366 case LNET_COOKIE_TYPE_ME:
367 return "ME";
368 case LNET_COOKIE_TYPE_EQ:
369 return "EQ";
370 }
371}
372
373static void
374lnet_res_container_cleanup(struct lnet_res_container *rec)
375{
376 int count = 0;
377
378 if (!rec->rec_type)
379 return;
380
381 while (!list_empty(&rec->rec_active)) {
382 struct list_head *e = rec->rec_active.next;
383
384 list_del_init(e);
385 if (rec->rec_type == LNET_COOKIE_TYPE_EQ) {
386 lnet_eq_free(list_entry(e, lnet_eq_t, eq_list));
387
388 } else if (rec->rec_type == LNET_COOKIE_TYPE_MD) {
389 lnet_md_free(list_entry(e, lnet_libmd_t, md_list));
390
391 } else {
392 LBUG();
393 }
394 count++;
395 }
396
397 if (count > 0) {
398
399
400
401
402
403 CERROR("%d active elements on exit of %s container\n",
404 count, lnet_res_type2str(rec->rec_type));
405 }
406
407 if (rec->rec_lh_hash) {
408 LIBCFS_FREE(rec->rec_lh_hash,
409 LNET_LH_HASH_SIZE * sizeof(rec->rec_lh_hash[0]));
410 rec->rec_lh_hash = NULL;
411 }
412
413 rec->rec_type = 0;
414}
415
416static int
417lnet_res_container_setup(struct lnet_res_container *rec, int cpt, int type)
418{
419 int rc = 0;
420 int i;
421
422 LASSERT(!rec->rec_type);
423
424 rec->rec_type = type;
425 INIT_LIST_HEAD(&rec->rec_active);
426 rec->rec_lh_cookie = (cpt << LNET_COOKIE_TYPE_BITS) | type;
427
428
429 LIBCFS_CPT_ALLOC(rec->rec_lh_hash, lnet_cpt_table(), cpt,
430 LNET_LH_HASH_SIZE * sizeof(rec->rec_lh_hash[0]));
431 if (!rec->rec_lh_hash) {
432 rc = -ENOMEM;
433 goto out;
434 }
435
436 for (i = 0; i < LNET_LH_HASH_SIZE; i++)
437 INIT_LIST_HEAD(&rec->rec_lh_hash[i]);
438
439 return 0;
440
441out:
442 CERROR("Failed to setup %s resource container\n",
443 lnet_res_type2str(type));
444 lnet_res_container_cleanup(rec);
445 return rc;
446}
447
448static void
449lnet_res_containers_destroy(struct lnet_res_container **recs)
450{
451 struct lnet_res_container *rec;
452 int i;
453
454 cfs_percpt_for_each(rec, i, recs)
455 lnet_res_container_cleanup(rec);
456
457 cfs_percpt_free(recs);
458}
459
460static struct lnet_res_container **
461lnet_res_containers_create(int type)
462{
463 struct lnet_res_container **recs;
464 struct lnet_res_container *rec;
465 int rc;
466 int i;
467
468 recs = cfs_percpt_alloc(lnet_cpt_table(), sizeof(*rec));
469 if (!recs) {
470 CERROR("Failed to allocate %s resource containers\n",
471 lnet_res_type2str(type));
472 return NULL;
473 }
474
475 cfs_percpt_for_each(rec, i, recs) {
476 rc = lnet_res_container_setup(rec, i, type);
477 if (rc) {
478 lnet_res_containers_destroy(recs);
479 return NULL;
480 }
481 }
482
483 return recs;
484}
485
486lnet_libhandle_t *
487lnet_res_lh_lookup(struct lnet_res_container *rec, __u64 cookie)
488{
489
490 struct list_head *head;
491 lnet_libhandle_t *lh;
492 unsigned int hash;
493
494 if ((cookie & LNET_COOKIE_MASK) != rec->rec_type)
495 return NULL;
496
497 hash = cookie >> (LNET_COOKIE_TYPE_BITS + LNET_CPT_BITS);
498 head = &rec->rec_lh_hash[hash & LNET_LH_HASH_MASK];
499
500 list_for_each_entry(lh, head, lh_hash_chain) {
501 if (lh->lh_cookie == cookie)
502 return lh;
503 }
504
505 return NULL;
506}
507
508void
509lnet_res_lh_initialize(struct lnet_res_container *rec, lnet_libhandle_t *lh)
510{
511
512 unsigned int ibits = LNET_COOKIE_TYPE_BITS + LNET_CPT_BITS;
513 unsigned int hash;
514
515 lh->lh_cookie = rec->rec_lh_cookie;
516 rec->rec_lh_cookie += 1 << ibits;
517
518 hash = (lh->lh_cookie >> ibits) & LNET_LH_HASH_MASK;
519
520 list_add(&lh->lh_hash_chain, &rec->rec_lh_hash[hash]);
521}
522
523static int lnet_unprepare(void);
524
525static int
526lnet_prepare(lnet_pid_t requested_pid)
527{
528
529 struct lnet_res_container **recs;
530 int rc = 0;
531
532 if (requested_pid == LNET_PID_ANY) {
533
534 return -ENETDOWN;
535 }
536
537 LASSERT(!the_lnet.ln_refcount);
538
539 the_lnet.ln_routing = 0;
540
541 LASSERT(!(requested_pid & LNET_PID_USERFLAG));
542 the_lnet.ln_pid = requested_pid;
543
544 INIT_LIST_HEAD(&the_lnet.ln_test_peers);
545 INIT_LIST_HEAD(&the_lnet.ln_nis);
546 INIT_LIST_HEAD(&the_lnet.ln_nis_cpt);
547 INIT_LIST_HEAD(&the_lnet.ln_nis_zombie);
548 INIT_LIST_HEAD(&the_lnet.ln_routers);
549 INIT_LIST_HEAD(&the_lnet.ln_drop_rules);
550 INIT_LIST_HEAD(&the_lnet.ln_delay_rules);
551
552 rc = lnet_create_remote_nets_table();
553 if (rc)
554 goto failed;
555
556
557
558
559 the_lnet.ln_interface_cookie = ktime_get_ns();
560
561 the_lnet.ln_counters = cfs_percpt_alloc(lnet_cpt_table(),
562 sizeof(lnet_counters_t));
563 if (!the_lnet.ln_counters) {
564 CERROR("Failed to allocate counters for LNet\n");
565 rc = -ENOMEM;
566 goto failed;
567 }
568
569 rc = lnet_peer_tables_create();
570 if (rc)
571 goto failed;
572
573 rc = lnet_msg_containers_create();
574 if (rc)
575 goto failed;
576
577 rc = lnet_res_container_setup(&the_lnet.ln_eq_container, 0,
578 LNET_COOKIE_TYPE_EQ);
579 if (rc)
580 goto failed;
581
582 recs = lnet_res_containers_create(LNET_COOKIE_TYPE_ME);
583 if (!recs) {
584 rc = -ENOMEM;
585 goto failed;
586 }
587
588 the_lnet.ln_me_containers = recs;
589
590 recs = lnet_res_containers_create(LNET_COOKIE_TYPE_MD);
591 if (!recs) {
592 rc = -ENOMEM;
593 goto failed;
594 }
595
596 the_lnet.ln_md_containers = recs;
597
598 rc = lnet_portals_create();
599 if (rc) {
600 CERROR("Failed to create portals for LNet: %d\n", rc);
601 goto failed;
602 }
603
604 return 0;
605
606 failed:
607 lnet_unprepare();
608 return rc;
609}
610
611static int
612lnet_unprepare(void)
613{
614
615
616
617
618
619
620 lnet_fail_nid(LNET_NID_ANY, 0);
621
622 LASSERT(!the_lnet.ln_refcount);
623 LASSERT(list_empty(&the_lnet.ln_test_peers));
624 LASSERT(list_empty(&the_lnet.ln_nis));
625 LASSERT(list_empty(&the_lnet.ln_nis_cpt));
626 LASSERT(list_empty(&the_lnet.ln_nis_zombie));
627
628 lnet_portals_destroy();
629
630 if (the_lnet.ln_md_containers) {
631 lnet_res_containers_destroy(the_lnet.ln_md_containers);
632 the_lnet.ln_md_containers = NULL;
633 }
634
635 if (the_lnet.ln_me_containers) {
636 lnet_res_containers_destroy(the_lnet.ln_me_containers);
637 the_lnet.ln_me_containers = NULL;
638 }
639
640 lnet_res_container_cleanup(&the_lnet.ln_eq_container);
641
642 lnet_msg_containers_destroy();
643 lnet_peer_tables_destroy();
644 lnet_rtrpools_free(0);
645
646 if (the_lnet.ln_counters) {
647 cfs_percpt_free(the_lnet.ln_counters);
648 the_lnet.ln_counters = NULL;
649 }
650 lnet_destroy_remote_nets_table();
651
652 return 0;
653}
654
655lnet_ni_t *
656lnet_net2ni_locked(__u32 net, int cpt)
657{
658 struct list_head *tmp;
659 lnet_ni_t *ni;
660
661 LASSERT(cpt != LNET_LOCK_EX);
662
663 list_for_each(tmp, &the_lnet.ln_nis) {
664 ni = list_entry(tmp, lnet_ni_t, ni_list);
665
666 if (LNET_NIDNET(ni->ni_nid) == net) {
667 lnet_ni_addref_locked(ni, cpt);
668 return ni;
669 }
670 }
671
672 return NULL;
673}
674
675lnet_ni_t *
676lnet_net2ni(__u32 net)
677{
678 lnet_ni_t *ni;
679
680 lnet_net_lock(0);
681 ni = lnet_net2ni_locked(net, 0);
682 lnet_net_unlock(0);
683
684 return ni;
685}
686EXPORT_SYMBOL(lnet_net2ni);
687
688static unsigned int
689lnet_nid_cpt_hash(lnet_nid_t nid, unsigned int number)
690{
691 __u64 key = nid;
692 unsigned int val;
693
694 LASSERT(number >= 1 && number <= LNET_CPT_NUMBER);
695
696 if (number == 1)
697 return 0;
698
699 val = hash_long(key, LNET_CPT_BITS);
700
701 if (val < number)
702 return val;
703
704 return (unsigned int)(key + val + (val >> 1)) % number;
705}
706
707int
708lnet_cpt_of_nid_locked(lnet_nid_t nid)
709{
710 struct lnet_ni *ni;
711
712
713 if (LNET_CPT_NUMBER == 1)
714 return 0;
715
716
717 if (!list_empty(&the_lnet.ln_nis_cpt)) {
718 list_for_each_entry(ni, &the_lnet.ln_nis_cpt, ni_cptlist) {
719 if (LNET_NIDNET(ni->ni_nid) != LNET_NIDNET(nid))
720 continue;
721
722 LASSERT(ni->ni_cpts);
723 return ni->ni_cpts[lnet_nid_cpt_hash
724 (nid, ni->ni_ncpts)];
725 }
726 }
727
728 return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
729}
730
731int
732lnet_cpt_of_nid(lnet_nid_t nid)
733{
734 int cpt;
735 int cpt2;
736
737 if (LNET_CPT_NUMBER == 1)
738 return 0;
739
740 if (list_empty(&the_lnet.ln_nis_cpt))
741 return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
742
743 cpt = lnet_net_lock_current();
744 cpt2 = lnet_cpt_of_nid_locked(nid);
745 lnet_net_unlock(cpt);
746
747 return cpt2;
748}
749EXPORT_SYMBOL(lnet_cpt_of_nid);
750
751int
752lnet_islocalnet(__u32 net)
753{
754 struct lnet_ni *ni;
755 int cpt;
756
757 cpt = lnet_net_lock_current();
758
759 ni = lnet_net2ni_locked(net, cpt);
760 if (ni)
761 lnet_ni_decref_locked(ni, cpt);
762
763 lnet_net_unlock(cpt);
764
765 return !!ni;
766}
767
768lnet_ni_t *
769lnet_nid2ni_locked(lnet_nid_t nid, int cpt)
770{
771 struct lnet_ni *ni;
772 struct list_head *tmp;
773
774 LASSERT(cpt != LNET_LOCK_EX);
775
776 list_for_each(tmp, &the_lnet.ln_nis) {
777 ni = list_entry(tmp, lnet_ni_t, ni_list);
778
779 if (ni->ni_nid == nid) {
780 lnet_ni_addref_locked(ni, cpt);
781 return ni;
782 }
783 }
784
785 return NULL;
786}
787
788int
789lnet_islocalnid(lnet_nid_t nid)
790{
791 struct lnet_ni *ni;
792 int cpt;
793
794 cpt = lnet_net_lock_current();
795 ni = lnet_nid2ni_locked(nid, cpt);
796 if (ni)
797 lnet_ni_decref_locked(ni, cpt);
798 lnet_net_unlock(cpt);
799
800 return !!ni;
801}
802
803int
804lnet_count_acceptor_nis(void)
805{
806
807 int count = 0;
808 struct list_head *tmp;
809 struct lnet_ni *ni;
810 int cpt;
811
812 cpt = lnet_net_lock_current();
813 list_for_each(tmp, &the_lnet.ln_nis) {
814 ni = list_entry(tmp, lnet_ni_t, ni_list);
815
816 if (ni->ni_lnd->lnd_accept)
817 count++;
818 }
819
820 lnet_net_unlock(cpt);
821
822 return count;
823}
824
825static lnet_ping_info_t *
826lnet_ping_info_create(int num_ni)
827{
828 lnet_ping_info_t *ping_info;
829 unsigned int infosz;
830
831 infosz = offsetof(lnet_ping_info_t, pi_ni[num_ni]);
832 LIBCFS_ALLOC(ping_info, infosz);
833 if (!ping_info) {
834 CERROR("Can't allocate ping info[%d]\n", num_ni);
835 return NULL;
836 }
837
838 ping_info->pi_nnis = num_ni;
839 ping_info->pi_pid = the_lnet.ln_pid;
840 ping_info->pi_magic = LNET_PROTO_PING_MAGIC;
841 ping_info->pi_features = LNET_PING_FEAT_NI_STATUS;
842
843 return ping_info;
844}
845
846static inline int
847lnet_get_ni_count(void)
848{
849 struct lnet_ni *ni;
850 int count = 0;
851
852 lnet_net_lock(0);
853
854 list_for_each_entry(ni, &the_lnet.ln_nis, ni_list)
855 count++;
856
857 lnet_net_unlock(0);
858
859 return count;
860}
861
862static inline void
863lnet_ping_info_free(lnet_ping_info_t *pinfo)
864{
865 LIBCFS_FREE(pinfo,
866 offsetof(lnet_ping_info_t,
867 pi_ni[pinfo->pi_nnis]));
868}
869
870static void
871lnet_ping_info_destroy(void)
872{
873 struct lnet_ni *ni;
874
875 lnet_net_lock(LNET_LOCK_EX);
876
877 list_for_each_entry(ni, &the_lnet.ln_nis, ni_list) {
878 lnet_ni_lock(ni);
879 ni->ni_status = NULL;
880 lnet_ni_unlock(ni);
881 }
882
883 lnet_ping_info_free(the_lnet.ln_ping_info);
884 the_lnet.ln_ping_info = NULL;
885
886 lnet_net_unlock(LNET_LOCK_EX);
887}
888
889static void
890lnet_ping_event_handler(lnet_event_t *event)
891{
892 lnet_ping_info_t *pinfo = event->md.user_ptr;
893
894 if (event->unlinked)
895 pinfo->pi_features = LNET_PING_FEAT_INVAL;
896}
897
898static int
899lnet_ping_info_setup(lnet_ping_info_t **ppinfo, lnet_handle_md_t *md_handle,
900 int ni_count, bool set_eq)
901{
902 lnet_process_id_t id = {LNET_NID_ANY, LNET_PID_ANY};
903 lnet_handle_me_t me_handle;
904 lnet_md_t md = { NULL };
905 int rc, rc2;
906
907 if (set_eq) {
908 rc = LNetEQAlloc(0, lnet_ping_event_handler,
909 &the_lnet.ln_ping_target_eq);
910 if (rc) {
911 CERROR("Can't allocate ping EQ: %d\n", rc);
912 return rc;
913 }
914 }
915
916 *ppinfo = lnet_ping_info_create(ni_count);
917 if (!*ppinfo) {
918 rc = -ENOMEM;
919 goto failed_0;
920 }
921
922 rc = LNetMEAttach(LNET_RESERVED_PORTAL, id,
923 LNET_PROTO_PING_MATCHBITS, 0,
924 LNET_UNLINK, LNET_INS_AFTER,
925 &me_handle);
926 if (rc) {
927 CERROR("Can't create ping ME: %d\n", rc);
928 goto failed_1;
929 }
930
931
932 md.start = *ppinfo;
933 md.length = offsetof(lnet_ping_info_t,
934 pi_ni[(*ppinfo)->pi_nnis]);
935 md.threshold = LNET_MD_THRESH_INF;
936 md.max_size = 0;
937 md.options = LNET_MD_OP_GET | LNET_MD_TRUNCATE |
938 LNET_MD_MANAGE_REMOTE;
939 md.user_ptr = NULL;
940 md.eq_handle = the_lnet.ln_ping_target_eq;
941 md.user_ptr = *ppinfo;
942
943 rc = LNetMDAttach(me_handle, md, LNET_RETAIN, md_handle);
944 if (rc) {
945 CERROR("Can't attach ping MD: %d\n", rc);
946 goto failed_2;
947 }
948
949 return 0;
950
951failed_2:
952 rc2 = LNetMEUnlink(me_handle);
953 LASSERT(!rc2);
954failed_1:
955 lnet_ping_info_free(*ppinfo);
956 *ppinfo = NULL;
957failed_0:
958 if (set_eq)
959 LNetEQFree(the_lnet.ln_ping_target_eq);
960 return rc;
961}
962
963static void
964lnet_ping_md_unlink(lnet_ping_info_t *pinfo, lnet_handle_md_t *md_handle)
965{
966 sigset_t blocked = cfs_block_allsigs();
967
968 LNetMDUnlink(*md_handle);
969 LNetInvalidateHandle(md_handle);
970
971
972 while (pinfo->pi_features != LNET_PING_FEAT_INVAL) {
973 CDEBUG(D_NET, "Still waiting for ping MD to unlink\n");
974 set_current_state(TASK_UNINTERRUPTIBLE);
975 schedule_timeout(cfs_time_seconds(1));
976 }
977
978 cfs_restore_sigs(blocked);
979}
980
981static void
982lnet_ping_info_install_locked(lnet_ping_info_t *ping_info)
983{
984 lnet_ni_status_t *ns;
985 lnet_ni_t *ni;
986 int i = 0;
987
988 list_for_each_entry(ni, &the_lnet.ln_nis, ni_list) {
989 LASSERT(i < ping_info->pi_nnis);
990
991 ns = &ping_info->pi_ni[i];
992
993 ns->ns_nid = ni->ni_nid;
994
995 lnet_ni_lock(ni);
996 ns->ns_status = (ni->ni_status) ?
997 ni->ni_status->ns_status : LNET_NI_STATUS_UP;
998 ni->ni_status = ns;
999 lnet_ni_unlock(ni);
1000
1001 i++;
1002 }
1003}
1004
1005static void
1006lnet_ping_target_update(lnet_ping_info_t *pinfo, lnet_handle_md_t md_handle)
1007{
1008 lnet_ping_info_t *old_pinfo = NULL;
1009 lnet_handle_md_t old_md;
1010
1011
1012 lnet_net_lock(LNET_LOCK_EX);
1013
1014 if (!the_lnet.ln_routing)
1015 pinfo->pi_features |= LNET_PING_FEAT_RTE_DISABLED;
1016 lnet_ping_info_install_locked(pinfo);
1017
1018 if (the_lnet.ln_ping_info) {
1019 old_pinfo = the_lnet.ln_ping_info;
1020 old_md = the_lnet.ln_ping_target_md;
1021 }
1022 the_lnet.ln_ping_target_md = md_handle;
1023 the_lnet.ln_ping_info = pinfo;
1024
1025 lnet_net_unlock(LNET_LOCK_EX);
1026
1027 if (old_pinfo) {
1028
1029 lnet_ping_md_unlink(old_pinfo, &old_md);
1030 lnet_ping_info_free(old_pinfo);
1031 }
1032}
1033
1034static void
1035lnet_ping_target_fini(void)
1036{
1037 int rc;
1038
1039 lnet_ping_md_unlink(the_lnet.ln_ping_info,
1040 &the_lnet.ln_ping_target_md);
1041
1042 rc = LNetEQFree(the_lnet.ln_ping_target_eq);
1043 LASSERT(!rc);
1044
1045 lnet_ping_info_destroy();
1046}
1047
1048static int
1049lnet_ni_tq_credits(lnet_ni_t *ni)
1050{
1051 int credits;
1052
1053 LASSERT(ni->ni_ncpts >= 1);
1054
1055 if (ni->ni_ncpts == 1)
1056 return ni->ni_maxtxcredits;
1057
1058 credits = ni->ni_maxtxcredits / ni->ni_ncpts;
1059 credits = max(credits, 8 * ni->ni_peertxcredits);
1060 credits = min(credits, ni->ni_maxtxcredits);
1061
1062 return credits;
1063}
1064
1065static void
1066lnet_ni_unlink_locked(lnet_ni_t *ni)
1067{
1068 if (!list_empty(&ni->ni_cptlist)) {
1069 list_del_init(&ni->ni_cptlist);
1070 lnet_ni_decref_locked(ni, 0);
1071 }
1072
1073
1074 LASSERT(!list_empty(&ni->ni_list));
1075 list_move(&ni->ni_list, &the_lnet.ln_nis_zombie);
1076 lnet_ni_decref_locked(ni, 0);
1077}
1078
1079static void
1080lnet_clear_zombies_nis_locked(void)
1081{
1082 int i;
1083 int islo;
1084 lnet_ni_t *ni;
1085 lnet_ni_t *temp;
1086
1087
1088
1089
1090
1091 i = 2;
1092 list_for_each_entry_safe(ni, temp, &the_lnet.ln_nis_zombie, ni_list) {
1093 int *ref;
1094 int j;
1095
1096 list_del_init(&ni->ni_list);
1097 cfs_percpt_for_each(ref, j, ni->ni_refs) {
1098 if (!*ref)
1099 continue;
1100
1101 list_add(&ni->ni_list, &the_lnet.ln_nis_zombie);
1102 break;
1103 }
1104
1105 if (!list_empty(&ni->ni_list)) {
1106 lnet_net_unlock(LNET_LOCK_EX);
1107 ++i;
1108 if ((i & (-i)) == i) {
1109 CDEBUG(D_WARNING, "Waiting for zombie LNI %s\n",
1110 libcfs_nid2str(ni->ni_nid));
1111 }
1112 set_current_state(TASK_UNINTERRUPTIBLE);
1113 schedule_timeout(cfs_time_seconds(1));
1114 lnet_net_lock(LNET_LOCK_EX);
1115 continue;
1116 }
1117
1118 ni->ni_lnd->lnd_refcount--;
1119 lnet_net_unlock(LNET_LOCK_EX);
1120
1121 islo = ni->ni_lnd->lnd_type == LOLND;
1122
1123 LASSERT(!in_interrupt());
1124 ni->ni_lnd->lnd_shutdown(ni);
1125
1126
1127
1128
1129
1130 if (!islo)
1131 CDEBUG(D_LNI, "Removed LNI %s\n",
1132 libcfs_nid2str(ni->ni_nid));
1133
1134 lnet_ni_free(ni);
1135 i = 2;
1136
1137 lnet_net_lock(LNET_LOCK_EX);
1138 }
1139}
1140
1141static void
1142lnet_shutdown_lndnis(void)
1143{
1144 lnet_ni_t *ni;
1145 lnet_ni_t *temp;
1146 int i;
1147
1148
1149
1150
1151 LASSERT(!the_lnet.ln_shutdown);
1152 LASSERT(!the_lnet.ln_refcount);
1153 LASSERT(list_empty(&the_lnet.ln_nis_zombie));
1154
1155 lnet_net_lock(LNET_LOCK_EX);
1156 the_lnet.ln_shutdown = 1;
1157
1158
1159 list_for_each_entry_safe(ni, temp, &the_lnet.ln_nis, ni_list) {
1160 lnet_ni_unlink_locked(ni);
1161 }
1162
1163
1164 if (the_lnet.ln_loni) {
1165 lnet_ni_decref_locked(the_lnet.ln_loni, 0);
1166 the_lnet.ln_loni = NULL;
1167 }
1168
1169 lnet_net_unlock(LNET_LOCK_EX);
1170
1171
1172
1173
1174
1175 for (i = 0; i < the_lnet.ln_nportals; i++)
1176 LNetClearLazyPortal(i);
1177
1178
1179
1180
1181
1182 lnet_peer_tables_cleanup(NULL);
1183
1184 lnet_net_lock(LNET_LOCK_EX);
1185
1186 lnet_clear_zombies_nis_locked();
1187 the_lnet.ln_shutdown = 0;
1188 lnet_net_unlock(LNET_LOCK_EX);
1189}
1190
1191
1192static void
1193lnet_shutdown_lndni(struct lnet_ni *ni)
1194{
1195 int i;
1196
1197 lnet_net_lock(LNET_LOCK_EX);
1198 lnet_ni_unlink_locked(ni);
1199 lnet_net_unlock(LNET_LOCK_EX);
1200
1201
1202 for (i = 0; i < the_lnet.ln_nportals; i++)
1203 lnet_clear_lazy_portal(ni, i, "Shutting down NI");
1204
1205
1206 lnet_peer_tables_cleanup(ni);
1207
1208 lnet_net_lock(LNET_LOCK_EX);
1209 lnet_clear_zombies_nis_locked();
1210 lnet_net_unlock(LNET_LOCK_EX);
1211}
1212
1213static int
1214lnet_startup_lndni(struct lnet_ni *ni, struct lnet_ioctl_config_data *conf)
1215{
1216 struct lnet_ioctl_config_lnd_tunables *lnd_tunables = NULL;
1217 int rc = -EINVAL;
1218 int lnd_type;
1219 lnd_t *lnd;
1220 struct lnet_tx_queue *tq;
1221 int i;
1222
1223 lnd_type = LNET_NETTYP(LNET_NIDNET(ni->ni_nid));
1224
1225 LASSERT(libcfs_isknown_lnd(lnd_type));
1226
1227 if (lnd_type == CIBLND || lnd_type == OPENIBLND ||
1228 lnd_type == IIBLND || lnd_type == VIBLND) {
1229 CERROR("LND %s obsoleted\n", libcfs_lnd2str(lnd_type));
1230 goto failed0;
1231 }
1232
1233
1234 lnet_net_lock(LNET_LOCK_EX);
1235 rc = lnet_net_unique(LNET_NIDNET(ni->ni_nid), &the_lnet.ln_nis);
1236 lnet_net_unlock(LNET_LOCK_EX);
1237 if (!rc) {
1238 if (lnd_type == LOLND) {
1239 lnet_ni_free(ni);
1240 return 0;
1241 }
1242
1243 CERROR("Net %s is not unique\n",
1244 libcfs_net2str(LNET_NIDNET(ni->ni_nid)));
1245 rc = -EEXIST;
1246 goto failed0;
1247 }
1248
1249 mutex_lock(&the_lnet.ln_lnd_mutex);
1250 lnd = lnet_find_lnd_by_type(lnd_type);
1251
1252 if (!lnd) {
1253 mutex_unlock(&the_lnet.ln_lnd_mutex);
1254 rc = request_module("%s", libcfs_lnd2modname(lnd_type));
1255 mutex_lock(&the_lnet.ln_lnd_mutex);
1256
1257 lnd = lnet_find_lnd_by_type(lnd_type);
1258 if (!lnd) {
1259 mutex_unlock(&the_lnet.ln_lnd_mutex);
1260 CERROR("Can't load LND %s, module %s, rc=%d\n",
1261 libcfs_lnd2str(lnd_type),
1262 libcfs_lnd2modname(lnd_type), rc);
1263 rc = -EINVAL;
1264 goto failed0;
1265 }
1266 }
1267
1268 lnet_net_lock(LNET_LOCK_EX);
1269 lnd->lnd_refcount++;
1270 lnet_net_unlock(LNET_LOCK_EX);
1271
1272 ni->ni_lnd = lnd;
1273
1274 if (conf && conf->cfg_hdr.ioc_len > sizeof(*conf))
1275 lnd_tunables = (struct lnet_ioctl_config_lnd_tunables *)conf->cfg_bulk;
1276
1277 if (lnd_tunables) {
1278 LIBCFS_ALLOC(ni->ni_lnd_tunables,
1279 sizeof(*ni->ni_lnd_tunables));
1280 if (!ni->ni_lnd_tunables) {
1281 mutex_unlock(&the_lnet.ln_lnd_mutex);
1282 rc = -ENOMEM;
1283 goto failed0;
1284 }
1285 memcpy(ni->ni_lnd_tunables, lnd_tunables,
1286 sizeof(*ni->ni_lnd_tunables));
1287 }
1288
1289
1290
1291
1292
1293 if (conf) {
1294 if (conf->cfg_config_u.cfg_net.net_peer_rtr_credits >= 0)
1295 ni->ni_peerrtrcredits =
1296 conf->cfg_config_u.cfg_net.net_peer_rtr_credits;
1297 if (conf->cfg_config_u.cfg_net.net_peer_timeout >= 0)
1298 ni->ni_peertimeout =
1299 conf->cfg_config_u.cfg_net.net_peer_timeout;
1300 if (conf->cfg_config_u.cfg_net.net_peer_tx_credits != -1)
1301 ni->ni_peertxcredits =
1302 conf->cfg_config_u.cfg_net.net_peer_tx_credits;
1303 if (conf->cfg_config_u.cfg_net.net_max_tx_credits >= 0)
1304 ni->ni_maxtxcredits =
1305 conf->cfg_config_u.cfg_net.net_max_tx_credits;
1306 }
1307
1308 rc = lnd->lnd_startup(ni);
1309
1310 mutex_unlock(&the_lnet.ln_lnd_mutex);
1311
1312 if (rc) {
1313 LCONSOLE_ERROR_MSG(0x105, "Error %d starting up LNI %s\n",
1314 rc, libcfs_lnd2str(lnd->lnd_type));
1315 lnet_net_lock(LNET_LOCK_EX);
1316 lnd->lnd_refcount--;
1317 lnet_net_unlock(LNET_LOCK_EX);
1318 goto failed0;
1319 }
1320
1321 LASSERT(ni->ni_peertimeout <= 0 || lnd->lnd_query);
1322
1323 lnet_net_lock(LNET_LOCK_EX);
1324
1325 lnet_ni_addref_locked(ni, 0);
1326 list_add_tail(&ni->ni_list, &the_lnet.ln_nis);
1327 if (ni->ni_cpts) {
1328 lnet_ni_addref_locked(ni, 0);
1329 list_add_tail(&ni->ni_cptlist, &the_lnet.ln_nis_cpt);
1330 }
1331
1332 lnet_net_unlock(LNET_LOCK_EX);
1333
1334 if (lnd->lnd_type == LOLND) {
1335 lnet_ni_addref(ni);
1336 LASSERT(!the_lnet.ln_loni);
1337 the_lnet.ln_loni = ni;
1338 return 0;
1339 }
1340
1341 if (!ni->ni_peertxcredits || !ni->ni_maxtxcredits) {
1342 LCONSOLE_ERROR_MSG(0x107, "LNI %s has no %scredits\n",
1343 libcfs_lnd2str(lnd->lnd_type),
1344 !ni->ni_peertxcredits ?
1345 "" : "per-peer ");
1346
1347
1348
1349
1350 lnet_shutdown_lndni(ni);
1351 return -EINVAL;
1352 }
1353
1354 cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
1355 tq->tq_credits_min =
1356 tq->tq_credits_max =
1357 tq->tq_credits = lnet_ni_tq_credits(ni);
1358 }
1359
1360 CDEBUG(D_LNI, "Added LNI %s [%d/%d/%d/%d]\n",
1361 libcfs_nid2str(ni->ni_nid), ni->ni_peertxcredits,
1362 lnet_ni_tq_credits(ni) * LNET_CPT_NUMBER,
1363 ni->ni_peerrtrcredits, ni->ni_peertimeout);
1364
1365 return 0;
1366failed0:
1367 lnet_ni_free(ni);
1368 return rc;
1369}
1370
1371static int
1372lnet_startup_lndnis(struct list_head *nilist)
1373{
1374 struct lnet_ni *ni;
1375 int rc;
1376 int ni_count = 0;
1377
1378 while (!list_empty(nilist)) {
1379 ni = list_entry(nilist->next, lnet_ni_t, ni_list);
1380 list_del(&ni->ni_list);
1381 rc = lnet_startup_lndni(ni, NULL);
1382
1383 if (rc < 0)
1384 goto failed;
1385
1386 ni_count++;
1387 }
1388
1389 return ni_count;
1390failed:
1391 lnet_shutdown_lndnis();
1392
1393 return rc;
1394}
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406int lnet_lib_init(void)
1407{
1408 int rc;
1409
1410 lnet_assert_wire_constants();
1411
1412 memset(&the_lnet, 0, sizeof(the_lnet));
1413
1414
1415 the_lnet.ln_cpt_table = cfs_cpt_table;
1416 the_lnet.ln_cpt_number = cfs_cpt_number(cfs_cpt_table);
1417
1418 LASSERT(the_lnet.ln_cpt_number > 0);
1419 if (the_lnet.ln_cpt_number > LNET_CPT_MAX) {
1420
1421 CERROR("Can't have %d CPTs for LNet (max allowed is %d), please change setting of CPT-table and retry\n",
1422 the_lnet.ln_cpt_number, LNET_CPT_MAX);
1423 return -E2BIG;
1424 }
1425
1426 while ((1 << the_lnet.ln_cpt_bits) < the_lnet.ln_cpt_number)
1427 the_lnet.ln_cpt_bits++;
1428
1429 rc = lnet_create_locks();
1430 if (rc) {
1431 CERROR("Can't create LNet global locks: %d\n", rc);
1432 return rc;
1433 }
1434
1435 the_lnet.ln_refcount = 0;
1436 LNetInvalidateHandle(&the_lnet.ln_rc_eqh);
1437 INIT_LIST_HEAD(&the_lnet.ln_lnds);
1438 INIT_LIST_HEAD(&the_lnet.ln_rcd_zombie);
1439 INIT_LIST_HEAD(&the_lnet.ln_rcd_deathrow);
1440
1441
1442
1443
1444
1445
1446 if (rnet_htable_size <= 0)
1447 rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT;
1448 else if (rnet_htable_size > LNET_REMOTE_NETS_HASH_MAX)
1449 rnet_htable_size = LNET_REMOTE_NETS_HASH_MAX;
1450 the_lnet.ln_remote_nets_hbits = max_t(int, 1,
1451 order_base_2(rnet_htable_size) - 1);
1452
1453
1454
1455
1456
1457
1458 lnet_register_lnd(&the_lolnd);
1459 return 0;
1460}
1461
1462
1463
1464
1465
1466
1467
1468void lnet_lib_exit(void)
1469{
1470 LASSERT(!the_lnet.ln_refcount);
1471
1472 while (!list_empty(&the_lnet.ln_lnds))
1473 lnet_unregister_lnd(list_entry(the_lnet.ln_lnds.next,
1474 lnd_t, lnd_list));
1475 lnet_destroy_locks();
1476}
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493int
1494LNetNIInit(lnet_pid_t requested_pid)
1495{
1496 int im_a_router = 0;
1497 int rc;
1498 int ni_count;
1499 lnet_ping_info_t *pinfo;
1500 lnet_handle_md_t md_handle;
1501 struct list_head net_head;
1502
1503 INIT_LIST_HEAD(&net_head);
1504
1505 mutex_lock(&the_lnet.ln_api_mutex);
1506
1507 CDEBUG(D_OTHER, "refs %d\n", the_lnet.ln_refcount);
1508
1509 if (the_lnet.ln_refcount > 0) {
1510 rc = the_lnet.ln_refcount++;
1511 mutex_unlock(&the_lnet.ln_api_mutex);
1512 return rc;
1513 }
1514
1515 rc = lnet_prepare(requested_pid);
1516 if (rc) {
1517 mutex_unlock(&the_lnet.ln_api_mutex);
1518 return rc;
1519 }
1520
1521
1522 if (!lnet_ni_alloc(LNET_MKNET(LOLND, 0), NULL, &net_head)) {
1523 rc = -ENOMEM;
1524 goto err_empty_list;
1525 }
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535 if (!the_lnet.ln_nis_from_mod_params) {
1536 rc = lnet_parse_networks(&net_head, lnet_get_networks());
1537 if (rc < 0)
1538 goto err_empty_list;
1539 }
1540
1541 ni_count = lnet_startup_lndnis(&net_head);
1542 if (ni_count < 0) {
1543 rc = ni_count;
1544 goto err_empty_list;
1545 }
1546
1547 if (!the_lnet.ln_nis_from_mod_params) {
1548 rc = lnet_parse_routes(lnet_get_routes(), &im_a_router);
1549 if (rc)
1550 goto err_shutdown_lndnis;
1551
1552 rc = lnet_check_routes();
1553 if (rc)
1554 goto err_destory_routes;
1555
1556 rc = lnet_rtrpools_alloc(im_a_router);
1557 if (rc)
1558 goto err_destory_routes;
1559 }
1560
1561 rc = lnet_acceptor_start();
1562 if (rc)
1563 goto err_destory_routes;
1564
1565 the_lnet.ln_refcount = 1;
1566
1567
1568 rc = lnet_ping_info_setup(&pinfo, &md_handle, ni_count, true);
1569 if (rc)
1570 goto err_acceptor_stop;
1571
1572 lnet_ping_target_update(pinfo, md_handle);
1573
1574 rc = lnet_router_checker_start();
1575 if (rc)
1576 goto err_stop_ping;
1577
1578 lnet_fault_init();
1579 lnet_router_debugfs_init();
1580
1581 mutex_unlock(&the_lnet.ln_api_mutex);
1582
1583 return 0;
1584
1585err_stop_ping:
1586 lnet_ping_target_fini();
1587err_acceptor_stop:
1588 the_lnet.ln_refcount = 0;
1589 lnet_acceptor_stop();
1590err_destory_routes:
1591 if (!the_lnet.ln_nis_from_mod_params)
1592 lnet_destroy_routes();
1593err_shutdown_lndnis:
1594 lnet_shutdown_lndnis();
1595err_empty_list:
1596 lnet_unprepare();
1597 LASSERT(rc < 0);
1598 mutex_unlock(&the_lnet.ln_api_mutex);
1599 while (!list_empty(&net_head)) {
1600 struct lnet_ni *ni;
1601
1602 ni = list_entry(net_head.next, struct lnet_ni, ni_list);
1603 list_del_init(&ni->ni_list);
1604 lnet_ni_free(ni);
1605 }
1606 return rc;
1607}
1608EXPORT_SYMBOL(LNetNIInit);
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619int
1620LNetNIFini(void)
1621{
1622 mutex_lock(&the_lnet.ln_api_mutex);
1623
1624 LASSERT(the_lnet.ln_refcount > 0);
1625
1626 if (the_lnet.ln_refcount != 1) {
1627 the_lnet.ln_refcount--;
1628 } else {
1629 LASSERT(!the_lnet.ln_niinit_self);
1630
1631 lnet_fault_fini();
1632 lnet_router_debugfs_fini();
1633 lnet_router_checker_stop();
1634 lnet_ping_target_fini();
1635
1636
1637 the_lnet.ln_refcount = 0;
1638
1639 lnet_acceptor_stop();
1640 lnet_destroy_routes();
1641 lnet_shutdown_lndnis();
1642 lnet_unprepare();
1643 }
1644
1645 mutex_unlock(&the_lnet.ln_api_mutex);
1646 return 0;
1647}
1648EXPORT_SYMBOL(LNetNIFini);
1649
1650
1651
1652
1653
1654
1655
1656
1657static void
1658lnet_fill_ni_info(struct lnet_ni *ni, struct lnet_ioctl_config_data *config)
1659{
1660 struct lnet_ioctl_config_lnd_tunables *lnd_cfg = NULL;
1661 struct lnet_ioctl_net_config *net_config;
1662 size_t min_size, tunable_size = 0;
1663 int i;
1664
1665 if (!ni || !config)
1666 return;
1667
1668 net_config = (struct lnet_ioctl_net_config *)config->cfg_bulk;
1669 if (!net_config)
1670 return;
1671
1672 BUILD_BUG_ON(ARRAY_SIZE(ni->ni_interfaces) !=
1673 ARRAY_SIZE(net_config->ni_interfaces));
1674
1675 for (i = 0; i < ARRAY_SIZE(ni->ni_interfaces); i++) {
1676 if (!ni->ni_interfaces[i])
1677 break;
1678
1679 strncpy(net_config->ni_interfaces[i],
1680 ni->ni_interfaces[i],
1681 sizeof(net_config->ni_interfaces[i]));
1682 }
1683
1684 config->cfg_nid = ni->ni_nid;
1685 config->cfg_config_u.cfg_net.net_peer_timeout = ni->ni_peertimeout;
1686 config->cfg_config_u.cfg_net.net_max_tx_credits = ni->ni_maxtxcredits;
1687 config->cfg_config_u.cfg_net.net_peer_tx_credits = ni->ni_peertxcredits;
1688 config->cfg_config_u.cfg_net.net_peer_rtr_credits = ni->ni_peerrtrcredits;
1689
1690 net_config->ni_status = ni->ni_status->ns_status;
1691
1692 if (ni->ni_cpts) {
1693 int num_cpts = min(ni->ni_ncpts, LNET_MAX_SHOW_NUM_CPT);
1694
1695 for (i = 0; i < num_cpts; i++)
1696 net_config->ni_cpts[i] = ni->ni_cpts[i];
1697
1698 config->cfg_ncpts = num_cpts;
1699 }
1700
1701
1702
1703
1704
1705 min_size = sizeof(*config) + sizeof(*net_config);
1706
1707 if (config->cfg_hdr.ioc_len > min_size)
1708 tunable_size = config->cfg_hdr.ioc_len - min_size;
1709
1710
1711 min_size = min(tunable_size, sizeof(*ni->ni_lnd_tunables));
1712 lnd_cfg = (struct lnet_ioctl_config_lnd_tunables *)net_config->cfg_bulk;
1713
1714 if (ni->ni_lnd_tunables && lnd_cfg && min_size) {
1715 memcpy(lnd_cfg, ni->ni_lnd_tunables, min_size);
1716 config->cfg_config_u.cfg_net.net_interface_count = 1;
1717
1718
1719 if (tunable_size > sizeof(*ni->ni_lnd_tunables)) {
1720 min_size = tunable_size - sizeof(ni->ni_lnd_tunables);
1721 config->cfg_hdr.ioc_len -= min_size;
1722 }
1723 }
1724}
1725
1726static int
1727lnet_get_net_config(struct lnet_ioctl_config_data *config)
1728{
1729 struct lnet_ni *ni;
1730 struct list_head *tmp;
1731 int idx = config->cfg_count;
1732 int cpt, i = 0;
1733 int rc = -ENOENT;
1734
1735 cpt = lnet_net_lock_current();
1736
1737 list_for_each(tmp, &the_lnet.ln_nis) {
1738 if (i++ != idx)
1739 continue;
1740
1741 ni = list_entry(tmp, lnet_ni_t, ni_list);
1742 lnet_ni_lock(ni);
1743 lnet_fill_ni_info(ni, config);
1744 lnet_ni_unlock(ni);
1745 rc = 0;
1746 break;
1747 }
1748
1749 lnet_net_unlock(cpt);
1750 return rc;
1751}
1752
1753int
1754lnet_dyn_add_ni(lnet_pid_t requested_pid, struct lnet_ioctl_config_data *conf)
1755{
1756 char *nets = conf->cfg_config_u.cfg_net.net_intf;
1757 lnet_ping_info_t *pinfo;
1758 lnet_handle_md_t md_handle;
1759 struct lnet_ni *ni;
1760 struct list_head net_head;
1761 lnet_remotenet_t *rnet;
1762 int rc;
1763
1764 INIT_LIST_HEAD(&net_head);
1765
1766
1767 rc = lnet_parse_networks(&net_head, nets);
1768 if (rc <= 0)
1769 return !rc ? -EINVAL : rc;
1770
1771 mutex_lock(&the_lnet.ln_api_mutex);
1772
1773 if (rc > 1) {
1774 rc = -EINVAL;
1775 goto failed0;
1776 }
1777
1778 ni = list_entry(net_head.next, struct lnet_ni, ni_list);
1779
1780 lnet_net_lock(LNET_LOCK_EX);
1781 rnet = lnet_find_net_locked(LNET_NIDNET(ni->ni_nid));
1782 lnet_net_unlock(LNET_LOCK_EX);
1783
1784
1785
1786
1787 if (rnet) {
1788 CERROR("Adding net %s will invalidate routing configuration\n",
1789 nets);
1790 rc = -EUSERS;
1791 goto failed0;
1792 }
1793
1794 rc = lnet_ping_info_setup(&pinfo, &md_handle, 1 + lnet_get_ni_count(),
1795 false);
1796 if (rc)
1797 goto failed0;
1798
1799 list_del_init(&ni->ni_list);
1800
1801 rc = lnet_startup_lndni(ni, conf);
1802 if (rc)
1803 goto failed1;
1804
1805 if (ni->ni_lnd->lnd_accept) {
1806 rc = lnet_acceptor_start();
1807 if (rc < 0) {
1808
1809 CERROR("Failed to start up acceptor thread\n");
1810 lnet_shutdown_lndni(ni);
1811 goto failed1;
1812 }
1813 }
1814
1815 lnet_ping_target_update(pinfo, md_handle);
1816 mutex_unlock(&the_lnet.ln_api_mutex);
1817
1818 return 0;
1819
1820failed1:
1821 lnet_ping_md_unlink(pinfo, &md_handle);
1822 lnet_ping_info_free(pinfo);
1823failed0:
1824 mutex_unlock(&the_lnet.ln_api_mutex);
1825 while (!list_empty(&net_head)) {
1826 ni = list_entry(net_head.next, struct lnet_ni, ni_list);
1827 list_del_init(&ni->ni_list);
1828 lnet_ni_free(ni);
1829 }
1830 return rc;
1831}
1832
1833int
1834lnet_dyn_del_ni(__u32 net)
1835{
1836 lnet_ni_t *ni;
1837 lnet_ping_info_t *pinfo;
1838 lnet_handle_md_t md_handle;
1839 int rc;
1840
1841
1842 if (LNET_NETTYP(net) == LOLND)
1843 return -EINVAL;
1844
1845 mutex_lock(&the_lnet.ln_api_mutex);
1846
1847 rc = lnet_ping_info_setup(&pinfo, &md_handle,
1848 lnet_get_ni_count() - 1, false);
1849 if (rc)
1850 goto out;
1851
1852 ni = lnet_net2ni(net);
1853 if (!ni) {
1854 rc = -EINVAL;
1855 goto failed;
1856 }
1857
1858
1859 lnet_ni_decref_locked(ni, 0);
1860
1861 lnet_shutdown_lndni(ni);
1862
1863 if (!lnet_count_acceptor_nis())
1864 lnet_acceptor_stop();
1865
1866 lnet_ping_target_update(pinfo, md_handle);
1867 goto out;
1868failed:
1869 lnet_ping_md_unlink(pinfo, &md_handle);
1870 lnet_ping_info_free(pinfo);
1871out:
1872 mutex_unlock(&the_lnet.ln_api_mutex);
1873
1874 return rc;
1875}
1876
1877
1878
1879
1880
1881int
1882LNetCtl(unsigned int cmd, void *arg)
1883{
1884 struct libcfs_ioctl_data *data = arg;
1885 struct lnet_ioctl_config_data *config;
1886 lnet_process_id_t id = {0};
1887 lnet_ni_t *ni;
1888 int rc;
1889 unsigned long secs_passed;
1890
1891 BUILD_BUG_ON(LIBCFS_IOC_DATA_MAX <
1892 sizeof(struct lnet_ioctl_net_config) +
1893 sizeof(struct lnet_ioctl_config_data));
1894
1895 switch (cmd) {
1896 case IOC_LIBCFS_GET_NI:
1897 rc = LNetGetId(data->ioc_count, &id);
1898 data->ioc_nid = id.nid;
1899 return rc;
1900
1901 case IOC_LIBCFS_FAIL_NID:
1902 return lnet_fail_nid(data->ioc_nid, data->ioc_count);
1903
1904 case IOC_LIBCFS_ADD_ROUTE:
1905 config = arg;
1906
1907 if (config->cfg_hdr.ioc_len < sizeof(*config))
1908 return -EINVAL;
1909
1910 mutex_lock(&the_lnet.ln_api_mutex);
1911 rc = lnet_add_route(config->cfg_net,
1912 config->cfg_config_u.cfg_route.rtr_hop,
1913 config->cfg_nid,
1914 config->cfg_config_u.cfg_route.rtr_priority);
1915 if (!rc) {
1916 rc = lnet_check_routes();
1917 if (rc)
1918 lnet_del_route(config->cfg_net,
1919 config->cfg_nid);
1920 }
1921 mutex_unlock(&the_lnet.ln_api_mutex);
1922 return rc;
1923
1924 case IOC_LIBCFS_DEL_ROUTE:
1925 config = arg;
1926
1927 if (config->cfg_hdr.ioc_len < sizeof(*config))
1928 return -EINVAL;
1929
1930 mutex_lock(&the_lnet.ln_api_mutex);
1931 rc = lnet_del_route(config->cfg_net, config->cfg_nid);
1932 mutex_unlock(&the_lnet.ln_api_mutex);
1933 return rc;
1934
1935 case IOC_LIBCFS_GET_ROUTE:
1936 config = arg;
1937
1938 if (config->cfg_hdr.ioc_len < sizeof(*config))
1939 return -EINVAL;
1940
1941 return lnet_get_route(config->cfg_count,
1942 &config->cfg_net,
1943 &config->cfg_config_u.cfg_route.rtr_hop,
1944 &config->cfg_nid,
1945 &config->cfg_config_u.cfg_route.rtr_flags,
1946 &config->cfg_config_u.cfg_route.rtr_priority);
1947
1948 case IOC_LIBCFS_GET_NET: {
1949 size_t total = sizeof(*config) +
1950 sizeof(struct lnet_ioctl_net_config);
1951 config = arg;
1952
1953 if (config->cfg_hdr.ioc_len < total)
1954 return -EINVAL;
1955
1956 return lnet_get_net_config(config);
1957 }
1958
1959 case IOC_LIBCFS_GET_LNET_STATS: {
1960 struct lnet_ioctl_lnet_stats *lnet_stats = arg;
1961
1962 if (lnet_stats->st_hdr.ioc_len < sizeof(*lnet_stats))
1963 return -EINVAL;
1964
1965 lnet_counters_get(&lnet_stats->st_cntrs);
1966 return 0;
1967 }
1968
1969 case IOC_LIBCFS_CONFIG_RTR:
1970 config = arg;
1971
1972 if (config->cfg_hdr.ioc_len < sizeof(*config))
1973 return -EINVAL;
1974
1975 mutex_lock(&the_lnet.ln_api_mutex);
1976 if (config->cfg_config_u.cfg_buffers.buf_enable) {
1977 rc = lnet_rtrpools_enable();
1978 mutex_unlock(&the_lnet.ln_api_mutex);
1979 return rc;
1980 }
1981 lnet_rtrpools_disable();
1982 mutex_unlock(&the_lnet.ln_api_mutex);
1983 return 0;
1984
1985 case IOC_LIBCFS_ADD_BUF:
1986 config = arg;
1987
1988 if (config->cfg_hdr.ioc_len < sizeof(*config))
1989 return -EINVAL;
1990
1991 mutex_lock(&the_lnet.ln_api_mutex);
1992 rc = lnet_rtrpools_adjust(config->cfg_config_u.cfg_buffers.buf_tiny,
1993 config->cfg_config_u.cfg_buffers.buf_small,
1994 config->cfg_config_u.cfg_buffers.buf_large);
1995 mutex_unlock(&the_lnet.ln_api_mutex);
1996 return rc;
1997
1998 case IOC_LIBCFS_GET_BUF: {
1999 struct lnet_ioctl_pool_cfg *pool_cfg;
2000 size_t total = sizeof(*config) + sizeof(*pool_cfg);
2001
2002 config = arg;
2003
2004 if (config->cfg_hdr.ioc_len < total)
2005 return -EINVAL;
2006
2007 pool_cfg = (struct lnet_ioctl_pool_cfg *)config->cfg_bulk;
2008 return lnet_get_rtr_pool_cfg(config->cfg_count, pool_cfg);
2009 }
2010
2011 case IOC_LIBCFS_GET_PEER_INFO: {
2012 struct lnet_ioctl_peer *peer_info = arg;
2013
2014 if (peer_info->pr_hdr.ioc_len < sizeof(*peer_info))
2015 return -EINVAL;
2016
2017 return lnet_get_peer_info(peer_info->pr_count,
2018 &peer_info->pr_nid,
2019 peer_info->pr_lnd_u.pr_peer_credits.cr_aliveness,
2020 &peer_info->pr_lnd_u.pr_peer_credits.cr_ncpt,
2021 &peer_info->pr_lnd_u.pr_peer_credits.cr_refcount,
2022 &peer_info->pr_lnd_u.pr_peer_credits.cr_ni_peer_tx_credits,
2023 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_credits,
2024 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_rtr_credits,
2025 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_min_rtr_credits,
2026 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_qnob);
2027 }
2028
2029 case IOC_LIBCFS_NOTIFY_ROUTER:
2030 secs_passed = (ktime_get_real_seconds() - data->ioc_u64[0]);
2031 secs_passed *= msecs_to_jiffies(MSEC_PER_SEC);
2032
2033 return lnet_notify(NULL, data->ioc_nid, data->ioc_flags,
2034 jiffies - secs_passed);
2035
2036 case IOC_LIBCFS_LNET_DIST:
2037 rc = LNetDist(data->ioc_nid, &data->ioc_nid, &data->ioc_u32[1]);
2038 if (rc < 0 && rc != -EHOSTUNREACH)
2039 return rc;
2040
2041 data->ioc_u32[0] = rc;
2042 return 0;
2043
2044 case IOC_LIBCFS_TESTPROTOCOMPAT:
2045 lnet_net_lock(LNET_LOCK_EX);
2046 the_lnet.ln_testprotocompat = data->ioc_flags;
2047 lnet_net_unlock(LNET_LOCK_EX);
2048 return 0;
2049
2050 case IOC_LIBCFS_LNET_FAULT:
2051 return lnet_fault_ctl(data->ioc_flags, data);
2052
2053 case IOC_LIBCFS_PING:
2054 id.nid = data->ioc_nid;
2055 id.pid = data->ioc_u32[0];
2056 rc = lnet_ping(id, data->ioc_u32[1],
2057 data->ioc_pbuf1,
2058 data->ioc_plen1 / sizeof(lnet_process_id_t));
2059 if (rc < 0)
2060 return rc;
2061 data->ioc_count = rc;
2062 return 0;
2063
2064 default:
2065 ni = lnet_net2ni(data->ioc_net);
2066 if (!ni)
2067 return -EINVAL;
2068
2069 if (!ni->ni_lnd->lnd_ctl)
2070 rc = -EINVAL;
2071 else
2072 rc = ni->ni_lnd->lnd_ctl(ni, cmd, arg);
2073
2074 lnet_ni_decref(ni);
2075 return rc;
2076 }
2077
2078}
2079EXPORT_SYMBOL(LNetCtl);
2080
2081void LNetDebugPeer(lnet_process_id_t id)
2082{
2083 lnet_debug_peer(id.nid);
2084}
2085EXPORT_SYMBOL(LNetDebugPeer);
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098int
2099LNetGetId(unsigned int index, lnet_process_id_t *id)
2100{
2101 struct lnet_ni *ni;
2102 struct list_head *tmp;
2103 int cpt;
2104 int rc = -ENOENT;
2105
2106 LASSERT(the_lnet.ln_refcount > 0);
2107
2108 cpt = lnet_net_lock_current();
2109
2110 list_for_each(tmp, &the_lnet.ln_nis) {
2111 if (index--)
2112 continue;
2113
2114 ni = list_entry(tmp, lnet_ni_t, ni_list);
2115
2116 id->nid = ni->ni_nid;
2117 id->pid = the_lnet.ln_pid;
2118 rc = 0;
2119 break;
2120 }
2121
2122 lnet_net_unlock(cpt);
2123 return rc;
2124}
2125EXPORT_SYMBOL(LNetGetId);
2126
2127
2128
2129
2130
2131void
2132LNetSnprintHandle(char *str, int len, lnet_handle_any_t h)
2133{
2134 snprintf(str, len, "%#llx", h.cookie);
2135}
2136EXPORT_SYMBOL(LNetSnprintHandle);
2137
2138static int lnet_ping(lnet_process_id_t id, int timeout_ms,
2139 lnet_process_id_t __user *ids, int n_ids)
2140{
2141 lnet_handle_eq_t eqh;
2142 lnet_handle_md_t mdh;
2143 lnet_event_t event;
2144 lnet_md_t md = { NULL };
2145 int which;
2146 int unlinked = 0;
2147 int replied = 0;
2148 const int a_long_time = 60000;
2149 int infosz;
2150 lnet_ping_info_t *info;
2151 lnet_process_id_t tmpid;
2152 int i;
2153 int nob;
2154 int rc;
2155 int rc2;
2156 sigset_t blocked;
2157
2158 infosz = offsetof(lnet_ping_info_t, pi_ni[n_ids]);
2159
2160 if (n_ids <= 0 ||
2161 id.nid == LNET_NID_ANY ||
2162 timeout_ms > 500000 ||
2163 n_ids > 20)
2164 return -EINVAL;
2165
2166 if (id.pid == LNET_PID_ANY)
2167 id.pid = LNET_PID_LUSTRE;
2168
2169 LIBCFS_ALLOC(info, infosz);
2170 if (!info)
2171 return -ENOMEM;
2172
2173
2174 rc = LNetEQAlloc(2, LNET_EQ_HANDLER_NONE, &eqh);
2175 if (rc) {
2176 CERROR("Can't allocate EQ: %d\n", rc);
2177 goto out_0;
2178 }
2179
2180
2181 md.start = info;
2182 md.length = infosz;
2183 md.threshold = 2;
2184 md.max_size = 0;
2185 md.options = LNET_MD_TRUNCATE;
2186 md.user_ptr = NULL;
2187 md.eq_handle = eqh;
2188
2189 rc = LNetMDBind(md, LNET_UNLINK, &mdh);
2190 if (rc) {
2191 CERROR("Can't bind MD: %d\n", rc);
2192 goto out_1;
2193 }
2194
2195 rc = LNetGet(LNET_NID_ANY, mdh, id,
2196 LNET_RESERVED_PORTAL,
2197 LNET_PROTO_PING_MATCHBITS, 0);
2198
2199 if (rc) {
2200
2201
2202 rc2 = LNetMDUnlink(mdh);
2203 LASSERT(!rc2);
2204
2205
2206 unlinked = 1;
2207 timeout_ms = a_long_time;
2208 }
2209
2210 do {
2211
2212 if (unlinked)
2213 blocked = cfs_block_allsigs();
2214
2215 rc2 = LNetEQPoll(&eqh, 1, timeout_ms, &event, &which);
2216
2217 if (unlinked)
2218 cfs_restore_sigs(blocked);
2219
2220 CDEBUG(D_NET, "poll %d(%d %d)%s\n", rc2,
2221 (rc2 <= 0) ? -1 : event.type,
2222 (rc2 <= 0) ? -1 : event.status,
2223 (rc2 > 0 && event.unlinked) ? " unlinked" : "");
2224
2225 LASSERT(rc2 != -EOVERFLOW);
2226
2227 if (rc2 <= 0 || event.status) {
2228
2229 if (!replied && !rc)
2230 rc = (rc2 < 0) ? rc2 :
2231 !rc2 ? -ETIMEDOUT :
2232 event.status;
2233
2234 if (!unlinked) {
2235
2236 LNetMDUnlink(mdh);
2237
2238 unlinked = 1;
2239 timeout_ms = a_long_time;
2240 } else if (!rc2) {
2241
2242 CWARN("ping %s: late network completion\n",
2243 libcfs_id2str(id));
2244 }
2245 } else if (event.type == LNET_EVENT_REPLY) {
2246 replied = 1;
2247 rc = event.mlength;
2248 }
2249
2250 } while (rc2 <= 0 || !event.unlinked);
2251
2252 if (!replied) {
2253 if (rc >= 0)
2254 CWARN("%s: Unexpected rc >= 0 but no reply!\n",
2255 libcfs_id2str(id));
2256 rc = -EIO;
2257 goto out_1;
2258 }
2259
2260 nob = rc;
2261 LASSERT(nob >= 0 && nob <= infosz);
2262
2263 rc = -EPROTO;
2264
2265 if (nob < 8) {
2266
2267 CERROR("%s: ping info too short %d\n",
2268 libcfs_id2str(id), nob);
2269 goto out_1;
2270 }
2271
2272 if (info->pi_magic == __swab32(LNET_PROTO_PING_MAGIC)) {
2273 lnet_swap_pinginfo(info);
2274 } else if (info->pi_magic != LNET_PROTO_PING_MAGIC) {
2275 CERROR("%s: Unexpected magic %08x\n",
2276 libcfs_id2str(id), info->pi_magic);
2277 goto out_1;
2278 }
2279
2280 if (!(info->pi_features & LNET_PING_FEAT_NI_STATUS)) {
2281 CERROR("%s: ping w/o NI status: 0x%x\n",
2282 libcfs_id2str(id), info->pi_features);
2283 goto out_1;
2284 }
2285
2286 if (nob < offsetof(lnet_ping_info_t, pi_ni[0])) {
2287 CERROR("%s: Short reply %d(%d min)\n", libcfs_id2str(id),
2288 nob, (int)offsetof(lnet_ping_info_t, pi_ni[0]));
2289 goto out_1;
2290 }
2291
2292 if (info->pi_nnis < n_ids)
2293 n_ids = info->pi_nnis;
2294
2295 if (nob < offsetof(lnet_ping_info_t, pi_ni[n_ids])) {
2296 CERROR("%s: Short reply %d(%d expected)\n", libcfs_id2str(id),
2297 nob, (int)offsetof(lnet_ping_info_t, pi_ni[n_ids]));
2298 goto out_1;
2299 }
2300
2301 rc = -EFAULT;
2302
2303 memset(&tmpid, 0, sizeof(tmpid));
2304 for (i = 0; i < n_ids; i++) {
2305 tmpid.pid = info->pi_pid;
2306 tmpid.nid = info->pi_ni[i].ns_nid;
2307 if (copy_to_user(&ids[i], &tmpid, sizeof(tmpid)))
2308 goto out_1;
2309 }
2310 rc = info->pi_nnis;
2311
2312 out_1:
2313 rc2 = LNetEQFree(eqh);
2314 if (rc2)
2315 CERROR("rc2 %d\n", rc2);
2316 LASSERT(!rc2);
2317
2318 out_0:
2319 LIBCFS_FREE(info, infosz);
2320 return rc;
2321}
2322
