1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37#define DEBUG_SUBSYSTEM S_LNET
38#include <linux/log2.h>
39#include <linux/ktime.h>
40
41#include "../../include/linux/lnet/lib-lnet.h"
42#include "../../include/linux/lnet/lib-dlc.h"
43
44#define D_LNI D_CONSOLE
45
46lnet_t the_lnet;
47EXPORT_SYMBOL(the_lnet);
48
49static char *ip2nets = "";
50module_param(ip2nets, charp, 0444);
51MODULE_PARM_DESC(ip2nets, "LNET network <- IP table");
52
53static char *networks = "";
54module_param(networks, charp, 0444);
55MODULE_PARM_DESC(networks, "local networks");
56
57static char *routes = "";
58module_param(routes, charp, 0444);
59MODULE_PARM_DESC(routes, "routes to non-local networks");
60
61static int rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT;
62module_param(rnet_htable_size, int, 0444);
63MODULE_PARM_DESC(rnet_htable_size, "size of remote network hash table");
64
65static int lnet_ping(lnet_process_id_t id, int timeout_ms,
66 lnet_process_id_t __user *ids, int n_ids);
67
68static char *
69lnet_get_routes(void)
70{
71 return routes;
72}
73
74static char *
75lnet_get_networks(void)
76{
77 char *nets;
78 int rc;
79
80 if (*networks && *ip2nets) {
81 LCONSOLE_ERROR_MSG(0x101, "Please specify EITHER 'networks' or 'ip2nets' but not both at once\n");
82 return NULL;
83 }
84
85 if (*ip2nets) {
86 rc = lnet_parse_ip2nets(&nets, ip2nets);
87 return !rc ? nets : NULL;
88 }
89
90 if (*networks)
91 return networks;
92
93 return "tcp";
94}
95
96static void
97lnet_init_locks(void)
98{
99 spin_lock_init(&the_lnet.ln_eq_wait_lock);
100 init_waitqueue_head(&the_lnet.ln_eq_waitq);
101 init_waitqueue_head(&the_lnet.ln_rc_waitq);
102 mutex_init(&the_lnet.ln_lnd_mutex);
103 mutex_init(&the_lnet.ln_api_mutex);
104}
105
106static int
107lnet_create_remote_nets_table(void)
108{
109 int i;
110 struct list_head *hash;
111
112 LASSERT(!the_lnet.ln_remote_nets_hash);
113 LASSERT(the_lnet.ln_remote_nets_hbits > 0);
114 LIBCFS_ALLOC(hash, LNET_REMOTE_NETS_HASH_SIZE * sizeof(*hash));
115 if (!hash) {
116 CERROR("Failed to create remote nets hash table\n");
117 return -ENOMEM;
118 }
119
120 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++)
121 INIT_LIST_HEAD(&hash[i]);
122 the_lnet.ln_remote_nets_hash = hash;
123 return 0;
124}
125
126static void
127lnet_destroy_remote_nets_table(void)
128{
129 int i;
130
131 if (!the_lnet.ln_remote_nets_hash)
132 return;
133
134 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++)
135 LASSERT(list_empty(&the_lnet.ln_remote_nets_hash[i]));
136
137 LIBCFS_FREE(the_lnet.ln_remote_nets_hash,
138 LNET_REMOTE_NETS_HASH_SIZE *
139 sizeof(the_lnet.ln_remote_nets_hash[0]));
140 the_lnet.ln_remote_nets_hash = NULL;
141}
142
143static void
144lnet_destroy_locks(void)
145{
146 if (the_lnet.ln_res_lock) {
147 cfs_percpt_lock_free(the_lnet.ln_res_lock);
148 the_lnet.ln_res_lock = NULL;
149 }
150
151 if (the_lnet.ln_net_lock) {
152 cfs_percpt_lock_free(the_lnet.ln_net_lock);
153 the_lnet.ln_net_lock = NULL;
154 }
155}
156
157static int
158lnet_create_locks(void)
159{
160 lnet_init_locks();
161
162 the_lnet.ln_res_lock = cfs_percpt_lock_alloc(lnet_cpt_table());
163 if (!the_lnet.ln_res_lock)
164 goto failed;
165
166 the_lnet.ln_net_lock = cfs_percpt_lock_alloc(lnet_cpt_table());
167 if (!the_lnet.ln_net_lock)
168 goto failed;
169
170 return 0;
171
172 failed:
173 lnet_destroy_locks();
174 return -ENOMEM;
175}
176
177static void lnet_assert_wire_constants(void)
178{
179
180
181
182
183
184
185
186
187 CLASSERT(LNET_PROTO_TCP_MAGIC == 0xeebc0ded);
188 CLASSERT(LNET_PROTO_TCP_VERSION_MAJOR == 1);
189 CLASSERT(LNET_PROTO_TCP_VERSION_MINOR == 0);
190 CLASSERT(LNET_MSG_ACK == 0);
191 CLASSERT(LNET_MSG_PUT == 1);
192 CLASSERT(LNET_MSG_GET == 2);
193 CLASSERT(LNET_MSG_REPLY == 3);
194 CLASSERT(LNET_MSG_HELLO == 4);
195
196
197 CLASSERT((int)sizeof(lnet_handle_wire_t) == 16);
198 CLASSERT((int)offsetof(lnet_handle_wire_t, wh_interface_cookie) == 0);
199 CLASSERT((int)sizeof(((lnet_handle_wire_t *)0)->wh_interface_cookie) == 8);
200 CLASSERT((int)offsetof(lnet_handle_wire_t, wh_object_cookie) == 8);
201 CLASSERT((int)sizeof(((lnet_handle_wire_t *)0)->wh_object_cookie) == 8);
202
203
204 CLASSERT((int)sizeof(lnet_magicversion_t) == 8);
205 CLASSERT((int)offsetof(lnet_magicversion_t, magic) == 0);
206 CLASSERT((int)sizeof(((lnet_magicversion_t *)0)->magic) == 4);
207 CLASSERT((int)offsetof(lnet_magicversion_t, version_major) == 4);
208 CLASSERT((int)sizeof(((lnet_magicversion_t *)0)->version_major) == 2);
209 CLASSERT((int)offsetof(lnet_magicversion_t, version_minor) == 6);
210 CLASSERT((int)sizeof(((lnet_magicversion_t *)0)->version_minor) == 2);
211
212
213 CLASSERT((int)sizeof(lnet_hdr_t) == 72);
214 CLASSERT((int)offsetof(lnet_hdr_t, dest_nid) == 0);
215 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->dest_nid) == 8);
216 CLASSERT((int)offsetof(lnet_hdr_t, src_nid) == 8);
217 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->src_nid) == 8);
218 CLASSERT((int)offsetof(lnet_hdr_t, dest_pid) == 16);
219 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->dest_pid) == 4);
220 CLASSERT((int)offsetof(lnet_hdr_t, src_pid) == 20);
221 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->src_pid) == 4);
222 CLASSERT((int)offsetof(lnet_hdr_t, type) == 24);
223 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->type) == 4);
224 CLASSERT((int)offsetof(lnet_hdr_t, payload_length) == 28);
225 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->payload_length) == 4);
226 CLASSERT((int)offsetof(lnet_hdr_t, msg) == 32);
227 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg) == 40);
228
229
230 CLASSERT((int)offsetof(lnet_hdr_t, msg.ack.dst_wmd) == 32);
231 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.ack.dst_wmd) == 16);
232 CLASSERT((int)offsetof(lnet_hdr_t, msg.ack.match_bits) == 48);
233 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.ack.match_bits) == 8);
234 CLASSERT((int)offsetof(lnet_hdr_t, msg.ack.mlength) == 56);
235 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.ack.mlength) == 4);
236
237
238 CLASSERT((int)offsetof(lnet_hdr_t, msg.put.ack_wmd) == 32);
239 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.put.ack_wmd) == 16);
240 CLASSERT((int)offsetof(lnet_hdr_t, msg.put.match_bits) == 48);
241 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.put.match_bits) == 8);
242 CLASSERT((int)offsetof(lnet_hdr_t, msg.put.hdr_data) == 56);
243 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.put.hdr_data) == 8);
244 CLASSERT((int)offsetof(lnet_hdr_t, msg.put.ptl_index) == 64);
245 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.put.ptl_index) == 4);
246 CLASSERT((int)offsetof(lnet_hdr_t, msg.put.offset) == 68);
247 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.put.offset) == 4);
248
249
250 CLASSERT((int)offsetof(lnet_hdr_t, msg.get.return_wmd) == 32);
251 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.get.return_wmd) == 16);
252 CLASSERT((int)offsetof(lnet_hdr_t, msg.get.match_bits) == 48);
253 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.get.match_bits) == 8);
254 CLASSERT((int)offsetof(lnet_hdr_t, msg.get.ptl_index) == 56);
255 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.get.ptl_index) == 4);
256 CLASSERT((int)offsetof(lnet_hdr_t, msg.get.src_offset) == 60);
257 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.get.src_offset) == 4);
258 CLASSERT((int)offsetof(lnet_hdr_t, msg.get.sink_length) == 64);
259 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.get.sink_length) == 4);
260
261
262 CLASSERT((int)offsetof(lnet_hdr_t, msg.reply.dst_wmd) == 32);
263 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.reply.dst_wmd) == 16);
264
265
266 CLASSERT((int)offsetof(lnet_hdr_t, msg.hello.incarnation) == 32);
267 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.hello.incarnation) == 8);
268 CLASSERT((int)offsetof(lnet_hdr_t, msg.hello.type) == 40);
269 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.hello.type) == 4);
270}
271
272static lnd_t *
273lnet_find_lnd_by_type(__u32 type)
274{
275 lnd_t *lnd;
276 struct list_head *tmp;
277
278
279 list_for_each(tmp, &the_lnet.ln_lnds) {
280 lnd = list_entry(tmp, lnd_t, lnd_list);
281
282 if (lnd->lnd_type == type)
283 return lnd;
284 }
285
286 return NULL;
287}
288
289void
290lnet_register_lnd(lnd_t *lnd)
291{
292 mutex_lock(&the_lnet.ln_lnd_mutex);
293
294 LASSERT(libcfs_isknown_lnd(lnd->lnd_type));
295 LASSERT(!lnet_find_lnd_by_type(lnd->lnd_type));
296
297 list_add_tail(&lnd->lnd_list, &the_lnet.ln_lnds);
298 lnd->lnd_refcount = 0;
299
300 CDEBUG(D_NET, "%s LND registered\n", libcfs_lnd2str(lnd->lnd_type));
301
302 mutex_unlock(&the_lnet.ln_lnd_mutex);
303}
304EXPORT_SYMBOL(lnet_register_lnd);
305
306void
307lnet_unregister_lnd(lnd_t *lnd)
308{
309 mutex_lock(&the_lnet.ln_lnd_mutex);
310
311 LASSERT(lnet_find_lnd_by_type(lnd->lnd_type) == lnd);
312 LASSERT(!lnd->lnd_refcount);
313
314 list_del(&lnd->lnd_list);
315 CDEBUG(D_NET, "%s LND unregistered\n", libcfs_lnd2str(lnd->lnd_type));
316
317 mutex_unlock(&the_lnet.ln_lnd_mutex);
318}
319EXPORT_SYMBOL(lnet_unregister_lnd);
320
321void
322lnet_counters_get(lnet_counters_t *counters)
323{
324 lnet_counters_t *ctr;
325 int i;
326
327 memset(counters, 0, sizeof(*counters));
328
329 lnet_net_lock(LNET_LOCK_EX);
330
331 cfs_percpt_for_each(ctr, i, the_lnet.ln_counters) {
332 counters->msgs_max += ctr->msgs_max;
333 counters->msgs_alloc += ctr->msgs_alloc;
334 counters->errors += ctr->errors;
335 counters->send_count += ctr->send_count;
336 counters->recv_count += ctr->recv_count;
337 counters->route_count += ctr->route_count;
338 counters->drop_count += ctr->drop_count;
339 counters->send_length += ctr->send_length;
340 counters->recv_length += ctr->recv_length;
341 counters->route_length += ctr->route_length;
342 counters->drop_length += ctr->drop_length;
343 }
344 lnet_net_unlock(LNET_LOCK_EX);
345}
346EXPORT_SYMBOL(lnet_counters_get);
347
348void
349lnet_counters_reset(void)
350{
351 lnet_counters_t *counters;
352 int i;
353
354 lnet_net_lock(LNET_LOCK_EX);
355
356 cfs_percpt_for_each(counters, i, the_lnet.ln_counters)
357 memset(counters, 0, sizeof(lnet_counters_t));
358
359 lnet_net_unlock(LNET_LOCK_EX);
360}
361
362static char *
363lnet_res_type2str(int type)
364{
365 switch (type) {
366 default:
367 LBUG();
368 case LNET_COOKIE_TYPE_MD:
369 return "MD";
370 case LNET_COOKIE_TYPE_ME:
371 return "ME";
372 case LNET_COOKIE_TYPE_EQ:
373 return "EQ";
374 }
375}
376
377static void
378lnet_res_container_cleanup(struct lnet_res_container *rec)
379{
380 int count = 0;
381
382 if (!rec->rec_type)
383 return;
384
385 while (!list_empty(&rec->rec_active)) {
386 struct list_head *e = rec->rec_active.next;
387
388 list_del_init(e);
389 if (rec->rec_type == LNET_COOKIE_TYPE_EQ) {
390 lnet_eq_free(list_entry(e, lnet_eq_t, eq_list));
391
392 } else if (rec->rec_type == LNET_COOKIE_TYPE_MD) {
393 lnet_md_free(list_entry(e, lnet_libmd_t, md_list));
394
395 } else {
396 LBUG();
397 }
398 count++;
399 }
400
401 if (count > 0) {
402
403
404
405
406
407 CERROR("%d active elements on exit of %s container\n",
408 count, lnet_res_type2str(rec->rec_type));
409 }
410
411 if (rec->rec_lh_hash) {
412 LIBCFS_FREE(rec->rec_lh_hash,
413 LNET_LH_HASH_SIZE * sizeof(rec->rec_lh_hash[0]));
414 rec->rec_lh_hash = NULL;
415 }
416
417 rec->rec_type = 0;
418}
419
420static int
421lnet_res_container_setup(struct lnet_res_container *rec, int cpt, int type)
422{
423 int rc = 0;
424 int i;
425
426 LASSERT(!rec->rec_type);
427
428 rec->rec_type = type;
429 INIT_LIST_HEAD(&rec->rec_active);
430 rec->rec_lh_cookie = (cpt << LNET_COOKIE_TYPE_BITS) | type;
431
432
433 LIBCFS_CPT_ALLOC(rec->rec_lh_hash, lnet_cpt_table(), cpt,
434 LNET_LH_HASH_SIZE * sizeof(rec->rec_lh_hash[0]));
435 if (!rec->rec_lh_hash) {
436 rc = -ENOMEM;
437 goto out;
438 }
439
440 for (i = 0; i < LNET_LH_HASH_SIZE; i++)
441 INIT_LIST_HEAD(&rec->rec_lh_hash[i]);
442
443 return 0;
444
445out:
446 CERROR("Failed to setup %s resource container\n",
447 lnet_res_type2str(type));
448 lnet_res_container_cleanup(rec);
449 return rc;
450}
451
452static void
453lnet_res_containers_destroy(struct lnet_res_container **recs)
454{
455 struct lnet_res_container *rec;
456 int i;
457
458 cfs_percpt_for_each(rec, i, recs)
459 lnet_res_container_cleanup(rec);
460
461 cfs_percpt_free(recs);
462}
463
464static struct lnet_res_container **
465lnet_res_containers_create(int type)
466{
467 struct lnet_res_container **recs;
468 struct lnet_res_container *rec;
469 int rc;
470 int i;
471
472 recs = cfs_percpt_alloc(lnet_cpt_table(), sizeof(*rec));
473 if (!recs) {
474 CERROR("Failed to allocate %s resource containers\n",
475 lnet_res_type2str(type));
476 return NULL;
477 }
478
479 cfs_percpt_for_each(rec, i, recs) {
480 rc = lnet_res_container_setup(rec, i, type);
481 if (rc) {
482 lnet_res_containers_destroy(recs);
483 return NULL;
484 }
485 }
486
487 return recs;
488}
489
490lnet_libhandle_t *
491lnet_res_lh_lookup(struct lnet_res_container *rec, __u64 cookie)
492{
493
494 struct list_head *head;
495 lnet_libhandle_t *lh;
496 unsigned int hash;
497
498 if ((cookie & LNET_COOKIE_MASK) != rec->rec_type)
499 return NULL;
500
501 hash = cookie >> (LNET_COOKIE_TYPE_BITS + LNET_CPT_BITS);
502 head = &rec->rec_lh_hash[hash & LNET_LH_HASH_MASK];
503
504 list_for_each_entry(lh, head, lh_hash_chain) {
505 if (lh->lh_cookie == cookie)
506 return lh;
507 }
508
509 return NULL;
510}
511
512void
513lnet_res_lh_initialize(struct lnet_res_container *rec, lnet_libhandle_t *lh)
514{
515
516 unsigned int ibits = LNET_COOKIE_TYPE_BITS + LNET_CPT_BITS;
517 unsigned int hash;
518
519 lh->lh_cookie = rec->rec_lh_cookie;
520 rec->rec_lh_cookie += 1 << ibits;
521
522 hash = (lh->lh_cookie >> ibits) & LNET_LH_HASH_MASK;
523
524 list_add(&lh->lh_hash_chain, &rec->rec_lh_hash[hash]);
525}
526
527static int lnet_unprepare(void);
528
529static int
530lnet_prepare(lnet_pid_t requested_pid)
531{
532
533 struct lnet_res_container **recs;
534 int rc = 0;
535
536 if (requested_pid == LNET_PID_ANY) {
537
538 return -ENETDOWN;
539 }
540
541 LASSERT(!the_lnet.ln_refcount);
542
543 the_lnet.ln_routing = 0;
544
545 LASSERT(!(requested_pid & LNET_PID_USERFLAG));
546 the_lnet.ln_pid = requested_pid;
547
548 INIT_LIST_HEAD(&the_lnet.ln_test_peers);
549 INIT_LIST_HEAD(&the_lnet.ln_nis);
550 INIT_LIST_HEAD(&the_lnet.ln_nis_cpt);
551 INIT_LIST_HEAD(&the_lnet.ln_nis_zombie);
552 INIT_LIST_HEAD(&the_lnet.ln_routers);
553 INIT_LIST_HEAD(&the_lnet.ln_drop_rules);
554 INIT_LIST_HEAD(&the_lnet.ln_delay_rules);
555
556 rc = lnet_create_remote_nets_table();
557 if (rc)
558 goto failed;
559
560
561
562
563 the_lnet.ln_interface_cookie = ktime_get_ns();
564
565 the_lnet.ln_counters = cfs_percpt_alloc(lnet_cpt_table(),
566 sizeof(lnet_counters_t));
567 if (!the_lnet.ln_counters) {
568 CERROR("Failed to allocate counters for LNet\n");
569 rc = -ENOMEM;
570 goto failed;
571 }
572
573 rc = lnet_peer_tables_create();
574 if (rc)
575 goto failed;
576
577 rc = lnet_msg_containers_create();
578 if (rc)
579 goto failed;
580
581 rc = lnet_res_container_setup(&the_lnet.ln_eq_container, 0,
582 LNET_COOKIE_TYPE_EQ);
583 if (rc)
584 goto failed;
585
586 recs = lnet_res_containers_create(LNET_COOKIE_TYPE_ME);
587 if (!recs) {
588 rc = -ENOMEM;
589 goto failed;
590 }
591
592 the_lnet.ln_me_containers = recs;
593
594 recs = lnet_res_containers_create(LNET_COOKIE_TYPE_MD);
595 if (!recs) {
596 rc = -ENOMEM;
597 goto failed;
598 }
599
600 the_lnet.ln_md_containers = recs;
601
602 rc = lnet_portals_create();
603 if (rc) {
604 CERROR("Failed to create portals for LNet: %d\n", rc);
605 goto failed;
606 }
607
608 return 0;
609
610 failed:
611 lnet_unprepare();
612 return rc;
613}
614
615static int
616lnet_unprepare(void)
617{
618
619
620
621
622
623
624 lnet_fail_nid(LNET_NID_ANY, 0);
625
626 LASSERT(!the_lnet.ln_refcount);
627 LASSERT(list_empty(&the_lnet.ln_test_peers));
628 LASSERT(list_empty(&the_lnet.ln_nis));
629 LASSERT(list_empty(&the_lnet.ln_nis_cpt));
630 LASSERT(list_empty(&the_lnet.ln_nis_zombie));
631
632 lnet_portals_destroy();
633
634 if (the_lnet.ln_md_containers) {
635 lnet_res_containers_destroy(the_lnet.ln_md_containers);
636 the_lnet.ln_md_containers = NULL;
637 }
638
639 if (the_lnet.ln_me_containers) {
640 lnet_res_containers_destroy(the_lnet.ln_me_containers);
641 the_lnet.ln_me_containers = NULL;
642 }
643
644 lnet_res_container_cleanup(&the_lnet.ln_eq_container);
645
646 lnet_msg_containers_destroy();
647 lnet_peer_tables_destroy();
648 lnet_rtrpools_free(0);
649
650 if (the_lnet.ln_counters) {
651 cfs_percpt_free(the_lnet.ln_counters);
652 the_lnet.ln_counters = NULL;
653 }
654 lnet_destroy_remote_nets_table();
655
656 return 0;
657}
658
659lnet_ni_t *
660lnet_net2ni_locked(__u32 net, int cpt)
661{
662 struct list_head *tmp;
663 lnet_ni_t *ni;
664
665 LASSERT(cpt != LNET_LOCK_EX);
666
667 list_for_each(tmp, &the_lnet.ln_nis) {
668 ni = list_entry(tmp, lnet_ni_t, ni_list);
669
670 if (LNET_NIDNET(ni->ni_nid) == net) {
671 lnet_ni_addref_locked(ni, cpt);
672 return ni;
673 }
674 }
675
676 return NULL;
677}
678
679lnet_ni_t *
680lnet_net2ni(__u32 net)
681{
682 lnet_ni_t *ni;
683
684 lnet_net_lock(0);
685 ni = lnet_net2ni_locked(net, 0);
686 lnet_net_unlock(0);
687
688 return ni;
689}
690EXPORT_SYMBOL(lnet_net2ni);
691
692static unsigned int
693lnet_nid_cpt_hash(lnet_nid_t nid, unsigned int number)
694{
695 __u64 key = nid;
696 unsigned int val;
697
698 LASSERT(number >= 1 && number <= LNET_CPT_NUMBER);
699
700 if (number == 1)
701 return 0;
702
703 val = hash_long(key, LNET_CPT_BITS);
704
705 if (val < number)
706 return val;
707
708 return (unsigned int)(key + val + (val >> 1)) % number;
709}
710
711int
712lnet_cpt_of_nid_locked(lnet_nid_t nid)
713{
714 struct lnet_ni *ni;
715
716
717 if (LNET_CPT_NUMBER == 1)
718 return 0;
719
720
721 if (!list_empty(&the_lnet.ln_nis_cpt)) {
722 list_for_each_entry(ni, &the_lnet.ln_nis_cpt, ni_cptlist) {
723 if (LNET_NIDNET(ni->ni_nid) != LNET_NIDNET(nid))
724 continue;
725
726 LASSERT(ni->ni_cpts);
727 return ni->ni_cpts[lnet_nid_cpt_hash
728 (nid, ni->ni_ncpts)];
729 }
730 }
731
732 return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
733}
734
735int
736lnet_cpt_of_nid(lnet_nid_t nid)
737{
738 int cpt;
739 int cpt2;
740
741 if (LNET_CPT_NUMBER == 1)
742 return 0;
743
744 if (list_empty(&the_lnet.ln_nis_cpt))
745 return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
746
747 cpt = lnet_net_lock_current();
748 cpt2 = lnet_cpt_of_nid_locked(nid);
749 lnet_net_unlock(cpt);
750
751 return cpt2;
752}
753EXPORT_SYMBOL(lnet_cpt_of_nid);
754
755int
756lnet_islocalnet(__u32 net)
757{
758 struct lnet_ni *ni;
759 int cpt;
760
761 cpt = lnet_net_lock_current();
762
763 ni = lnet_net2ni_locked(net, cpt);
764 if (ni)
765 lnet_ni_decref_locked(ni, cpt);
766
767 lnet_net_unlock(cpt);
768
769 return !!ni;
770}
771
772lnet_ni_t *
773lnet_nid2ni_locked(lnet_nid_t nid, int cpt)
774{
775 struct lnet_ni *ni;
776 struct list_head *tmp;
777
778 LASSERT(cpt != LNET_LOCK_EX);
779
780 list_for_each(tmp, &the_lnet.ln_nis) {
781 ni = list_entry(tmp, lnet_ni_t, ni_list);
782
783 if (ni->ni_nid == nid) {
784 lnet_ni_addref_locked(ni, cpt);
785 return ni;
786 }
787 }
788
789 return NULL;
790}
791
792int
793lnet_islocalnid(lnet_nid_t nid)
794{
795 struct lnet_ni *ni;
796 int cpt;
797
798 cpt = lnet_net_lock_current();
799 ni = lnet_nid2ni_locked(nid, cpt);
800 if (ni)
801 lnet_ni_decref_locked(ni, cpt);
802 lnet_net_unlock(cpt);
803
804 return !!ni;
805}
806
807int
808lnet_count_acceptor_nis(void)
809{
810
811 int count = 0;
812 struct list_head *tmp;
813 struct lnet_ni *ni;
814 int cpt;
815
816 cpt = lnet_net_lock_current();
817 list_for_each(tmp, &the_lnet.ln_nis) {
818 ni = list_entry(tmp, lnet_ni_t, ni_list);
819
820 if (ni->ni_lnd->lnd_accept)
821 count++;
822 }
823
824 lnet_net_unlock(cpt);
825
826 return count;
827}
828
829static lnet_ping_info_t *
830lnet_ping_info_create(int num_ni)
831{
832 lnet_ping_info_t *ping_info;
833 unsigned int infosz;
834
835 infosz = offsetof(lnet_ping_info_t, pi_ni[num_ni]);
836 LIBCFS_ALLOC(ping_info, infosz);
837 if (!ping_info) {
838 CERROR("Can't allocate ping info[%d]\n", num_ni);
839 return NULL;
840 }
841
842 ping_info->pi_nnis = num_ni;
843 ping_info->pi_pid = the_lnet.ln_pid;
844 ping_info->pi_magic = LNET_PROTO_PING_MAGIC;
845 ping_info->pi_features = LNET_PING_FEAT_NI_STATUS;
846
847 return ping_info;
848}
849
850static inline int
851lnet_get_ni_count(void)
852{
853 struct lnet_ni *ni;
854 int count = 0;
855
856 lnet_net_lock(0);
857
858 list_for_each_entry(ni, &the_lnet.ln_nis, ni_list)
859 count++;
860
861 lnet_net_unlock(0);
862
863 return count;
864}
865
866static inline void
867lnet_ping_info_free(lnet_ping_info_t *pinfo)
868{
869 LIBCFS_FREE(pinfo,
870 offsetof(lnet_ping_info_t,
871 pi_ni[pinfo->pi_nnis]));
872}
873
874static void
875lnet_ping_info_destroy(void)
876{
877 struct lnet_ni *ni;
878
879 lnet_net_lock(LNET_LOCK_EX);
880
881 list_for_each_entry(ni, &the_lnet.ln_nis, ni_list) {
882 lnet_ni_lock(ni);
883 ni->ni_status = NULL;
884 lnet_ni_unlock(ni);
885 }
886
887 lnet_ping_info_free(the_lnet.ln_ping_info);
888 the_lnet.ln_ping_info = NULL;
889
890 lnet_net_unlock(LNET_LOCK_EX);
891}
892
893static void
894lnet_ping_event_handler(lnet_event_t *event)
895{
896 lnet_ping_info_t *pinfo = event->md.user_ptr;
897
898 if (event->unlinked)
899 pinfo->pi_features = LNET_PING_FEAT_INVAL;
900}
901
902static int
903lnet_ping_info_setup(lnet_ping_info_t **ppinfo, lnet_handle_md_t *md_handle,
904 int ni_count, bool set_eq)
905{
906 lnet_process_id_t id = {LNET_NID_ANY, LNET_PID_ANY};
907 lnet_handle_me_t me_handle;
908 lnet_md_t md = { NULL };
909 int rc, rc2;
910
911 if (set_eq) {
912 rc = LNetEQAlloc(0, lnet_ping_event_handler,
913 &the_lnet.ln_ping_target_eq);
914 if (rc) {
915 CERROR("Can't allocate ping EQ: %d\n", rc);
916 return rc;
917 }
918 }
919
920 *ppinfo = lnet_ping_info_create(ni_count);
921 if (!*ppinfo) {
922 rc = -ENOMEM;
923 goto failed_0;
924 }
925
926 rc = LNetMEAttach(LNET_RESERVED_PORTAL, id,
927 LNET_PROTO_PING_MATCHBITS, 0,
928 LNET_UNLINK, LNET_INS_AFTER,
929 &me_handle);
930 if (rc) {
931 CERROR("Can't create ping ME: %d\n", rc);
932 goto failed_1;
933 }
934
935
936 md.start = *ppinfo;
937 md.length = offsetof(lnet_ping_info_t,
938 pi_ni[(*ppinfo)->pi_nnis]);
939 md.threshold = LNET_MD_THRESH_INF;
940 md.max_size = 0;
941 md.options = LNET_MD_OP_GET | LNET_MD_TRUNCATE |
942 LNET_MD_MANAGE_REMOTE;
943 md.user_ptr = NULL;
944 md.eq_handle = the_lnet.ln_ping_target_eq;
945 md.user_ptr = *ppinfo;
946
947 rc = LNetMDAttach(me_handle, md, LNET_RETAIN, md_handle);
948 if (rc) {
949 CERROR("Can't attach ping MD: %d\n", rc);
950 goto failed_2;
951 }
952
953 return 0;
954
955failed_2:
956 rc2 = LNetMEUnlink(me_handle);
957 LASSERT(!rc2);
958failed_1:
959 lnet_ping_info_free(*ppinfo);
960 *ppinfo = NULL;
961failed_0:
962 if (set_eq)
963 LNetEQFree(the_lnet.ln_ping_target_eq);
964 return rc;
965}
966
967static void
968lnet_ping_md_unlink(lnet_ping_info_t *pinfo, lnet_handle_md_t *md_handle)
969{
970 sigset_t blocked = cfs_block_allsigs();
971
972 LNetMDUnlink(*md_handle);
973 LNetInvalidateHandle(md_handle);
974
975
976 while (pinfo->pi_features != LNET_PING_FEAT_INVAL) {
977 CDEBUG(D_NET, "Still waiting for ping MD to unlink\n");
978 set_current_state(TASK_UNINTERRUPTIBLE);
979 schedule_timeout(cfs_time_seconds(1));
980 }
981
982 cfs_restore_sigs(blocked);
983}
984
985static void
986lnet_ping_info_install_locked(lnet_ping_info_t *ping_info)
987{
988 lnet_ni_status_t *ns;
989 lnet_ni_t *ni;
990 int i = 0;
991
992 list_for_each_entry(ni, &the_lnet.ln_nis, ni_list) {
993 LASSERT(i < ping_info->pi_nnis);
994
995 ns = &ping_info->pi_ni[i];
996
997 ns->ns_nid = ni->ni_nid;
998
999 lnet_ni_lock(ni);
1000 ns->ns_status = (ni->ni_status) ?
1001 ni->ni_status->ns_status : LNET_NI_STATUS_UP;
1002 ni->ni_status = ns;
1003 lnet_ni_unlock(ni);
1004
1005 i++;
1006 }
1007}
1008
1009static void
1010lnet_ping_target_update(lnet_ping_info_t *pinfo, lnet_handle_md_t md_handle)
1011{
1012 lnet_ping_info_t *old_pinfo = NULL;
1013 lnet_handle_md_t old_md;
1014
1015
1016 lnet_net_lock(LNET_LOCK_EX);
1017
1018 if (!the_lnet.ln_routing)
1019 pinfo->pi_features |= LNET_PING_FEAT_RTE_DISABLED;
1020 lnet_ping_info_install_locked(pinfo);
1021
1022 if (the_lnet.ln_ping_info) {
1023 old_pinfo = the_lnet.ln_ping_info;
1024 old_md = the_lnet.ln_ping_target_md;
1025 }
1026 the_lnet.ln_ping_target_md = md_handle;
1027 the_lnet.ln_ping_info = pinfo;
1028
1029 lnet_net_unlock(LNET_LOCK_EX);
1030
1031 if (old_pinfo) {
1032
1033 lnet_ping_md_unlink(old_pinfo, &old_md);
1034 lnet_ping_info_free(old_pinfo);
1035 }
1036}
1037
1038static void
1039lnet_ping_target_fini(void)
1040{
1041 int rc;
1042
1043 lnet_ping_md_unlink(the_lnet.ln_ping_info,
1044 &the_lnet.ln_ping_target_md);
1045
1046 rc = LNetEQFree(the_lnet.ln_ping_target_eq);
1047 LASSERT(!rc);
1048
1049 lnet_ping_info_destroy();
1050}
1051
1052static int
1053lnet_ni_tq_credits(lnet_ni_t *ni)
1054{
1055 int credits;
1056
1057 LASSERT(ni->ni_ncpts >= 1);
1058
1059 if (ni->ni_ncpts == 1)
1060 return ni->ni_maxtxcredits;
1061
1062 credits = ni->ni_maxtxcredits / ni->ni_ncpts;
1063 credits = max(credits, 8 * ni->ni_peertxcredits);
1064 credits = min(credits, ni->ni_maxtxcredits);
1065
1066 return credits;
1067}
1068
1069static void
1070lnet_ni_unlink_locked(lnet_ni_t *ni)
1071{
1072 if (!list_empty(&ni->ni_cptlist)) {
1073 list_del_init(&ni->ni_cptlist);
1074 lnet_ni_decref_locked(ni, 0);
1075 }
1076
1077
1078 LASSERT(!list_empty(&ni->ni_list));
1079 list_move(&ni->ni_list, &the_lnet.ln_nis_zombie);
1080 lnet_ni_decref_locked(ni, 0);
1081}
1082
1083static void
1084lnet_clear_zombies_nis_locked(void)
1085{
1086 int i;
1087 int islo;
1088 lnet_ni_t *ni;
1089 lnet_ni_t *temp;
1090
1091
1092
1093
1094
1095 i = 2;
1096 list_for_each_entry_safe(ni, temp, &the_lnet.ln_nis_zombie, ni_list) {
1097 int *ref;
1098 int j;
1099
1100 list_del_init(&ni->ni_list);
1101 cfs_percpt_for_each(ref, j, ni->ni_refs) {
1102 if (!*ref)
1103 continue;
1104
1105 list_add(&ni->ni_list, &the_lnet.ln_nis_zombie);
1106 break;
1107 }
1108
1109 if (!list_empty(&ni->ni_list)) {
1110 lnet_net_unlock(LNET_LOCK_EX);
1111 ++i;
1112 if ((i & (-i)) == i) {
1113 CDEBUG(D_WARNING, "Waiting for zombie LNI %s\n",
1114 libcfs_nid2str(ni->ni_nid));
1115 }
1116 set_current_state(TASK_UNINTERRUPTIBLE);
1117 schedule_timeout(cfs_time_seconds(1));
1118 lnet_net_lock(LNET_LOCK_EX);
1119 continue;
1120 }
1121
1122 ni->ni_lnd->lnd_refcount--;
1123 lnet_net_unlock(LNET_LOCK_EX);
1124
1125 islo = ni->ni_lnd->lnd_type == LOLND;
1126
1127 LASSERT(!in_interrupt());
1128 ni->ni_lnd->lnd_shutdown(ni);
1129
1130
1131
1132
1133
1134 if (!islo)
1135 CDEBUG(D_LNI, "Removed LNI %s\n",
1136 libcfs_nid2str(ni->ni_nid));
1137
1138 lnet_ni_free(ni);
1139 i = 2;
1140
1141 lnet_net_lock(LNET_LOCK_EX);
1142 }
1143}
1144
1145static void
1146lnet_shutdown_lndnis(void)
1147{
1148 lnet_ni_t *ni;
1149 lnet_ni_t *temp;
1150 int i;
1151
1152
1153
1154
1155 LASSERT(!the_lnet.ln_shutdown);
1156 LASSERT(!the_lnet.ln_refcount);
1157 LASSERT(list_empty(&the_lnet.ln_nis_zombie));
1158
1159 lnet_net_lock(LNET_LOCK_EX);
1160 the_lnet.ln_shutdown = 1;
1161
1162
1163 list_for_each_entry_safe(ni, temp, &the_lnet.ln_nis, ni_list) {
1164 lnet_ni_unlink_locked(ni);
1165 }
1166
1167
1168 if (the_lnet.ln_loni) {
1169 lnet_ni_decref_locked(the_lnet.ln_loni, 0);
1170 the_lnet.ln_loni = NULL;
1171 }
1172
1173 lnet_net_unlock(LNET_LOCK_EX);
1174
1175
1176
1177
1178
1179 for (i = 0; i < the_lnet.ln_nportals; i++)
1180 LNetClearLazyPortal(i);
1181
1182
1183
1184
1185
1186 lnet_peer_tables_cleanup(NULL);
1187
1188 lnet_net_lock(LNET_LOCK_EX);
1189
1190 lnet_clear_zombies_nis_locked();
1191 the_lnet.ln_shutdown = 0;
1192 lnet_net_unlock(LNET_LOCK_EX);
1193}
1194
1195
1196static void
1197lnet_shutdown_lndni(struct lnet_ni *ni)
1198{
1199 int i;
1200
1201 lnet_net_lock(LNET_LOCK_EX);
1202 lnet_ni_unlink_locked(ni);
1203 lnet_net_unlock(LNET_LOCK_EX);
1204
1205
1206 for (i = 0; i < the_lnet.ln_nportals; i++)
1207 lnet_clear_lazy_portal(ni, i, "Shutting down NI");
1208
1209
1210 lnet_peer_tables_cleanup(ni);
1211
1212 lnet_net_lock(LNET_LOCK_EX);
1213 lnet_clear_zombies_nis_locked();
1214 lnet_net_unlock(LNET_LOCK_EX);
1215}
1216
1217static int
1218lnet_startup_lndni(struct lnet_ni *ni, __s32 peer_timeout,
1219 __s32 peer_cr, __s32 peer_buf_cr, __s32 credits)
1220{
1221 int rc = -EINVAL;
1222 int lnd_type;
1223 lnd_t *lnd;
1224 struct lnet_tx_queue *tq;
1225 int i;
1226
1227 lnd_type = LNET_NETTYP(LNET_NIDNET(ni->ni_nid));
1228
1229 LASSERT(libcfs_isknown_lnd(lnd_type));
1230
1231 if (lnd_type == CIBLND || lnd_type == OPENIBLND ||
1232 lnd_type == IIBLND || lnd_type == VIBLND) {
1233 CERROR("LND %s obsoleted\n", libcfs_lnd2str(lnd_type));
1234 goto failed0;
1235 }
1236
1237
1238 lnet_net_lock(LNET_LOCK_EX);
1239 rc = lnet_net_unique(LNET_NIDNET(ni->ni_nid), &the_lnet.ln_nis);
1240 lnet_net_unlock(LNET_LOCK_EX);
1241 if (!rc) {
1242 if (lnd_type == LOLND) {
1243 lnet_ni_free(ni);
1244 return 0;
1245 }
1246
1247 CERROR("Net %s is not unique\n",
1248 libcfs_net2str(LNET_NIDNET(ni->ni_nid)));
1249 rc = -EEXIST;
1250 goto failed0;
1251 }
1252
1253 mutex_lock(&the_lnet.ln_lnd_mutex);
1254 lnd = lnet_find_lnd_by_type(lnd_type);
1255
1256 if (!lnd) {
1257 mutex_unlock(&the_lnet.ln_lnd_mutex);
1258 rc = request_module("%s", libcfs_lnd2modname(lnd_type));
1259 mutex_lock(&the_lnet.ln_lnd_mutex);
1260
1261 lnd = lnet_find_lnd_by_type(lnd_type);
1262 if (!lnd) {
1263 mutex_unlock(&the_lnet.ln_lnd_mutex);
1264 CERROR("Can't load LND %s, module %s, rc=%d\n",
1265 libcfs_lnd2str(lnd_type),
1266 libcfs_lnd2modname(lnd_type), rc);
1267 rc = -EINVAL;
1268 goto failed0;
1269 }
1270 }
1271
1272 lnet_net_lock(LNET_LOCK_EX);
1273 lnd->lnd_refcount++;
1274 lnet_net_unlock(LNET_LOCK_EX);
1275
1276 ni->ni_lnd = lnd;
1277
1278 rc = lnd->lnd_startup(ni);
1279
1280 mutex_unlock(&the_lnet.ln_lnd_mutex);
1281
1282 if (rc) {
1283 LCONSOLE_ERROR_MSG(0x105, "Error %d starting up LNI %s\n",
1284 rc, libcfs_lnd2str(lnd->lnd_type));
1285 lnet_net_lock(LNET_LOCK_EX);
1286 lnd->lnd_refcount--;
1287 lnet_net_unlock(LNET_LOCK_EX);
1288 goto failed0;
1289 }
1290
1291
1292
1293
1294
1295 if (peer_buf_cr >= 0)
1296 ni->ni_peerrtrcredits = peer_buf_cr;
1297 if (peer_timeout >= 0)
1298 ni->ni_peertimeout = peer_timeout;
1299
1300
1301
1302
1303
1304
1305
1306
1307 if (credits >= 0)
1308 ni->ni_maxtxcredits = credits;
1309
1310 LASSERT(ni->ni_peertimeout <= 0 || lnd->lnd_query);
1311
1312 lnet_net_lock(LNET_LOCK_EX);
1313
1314 lnet_ni_addref_locked(ni, 0);
1315 list_add_tail(&ni->ni_list, &the_lnet.ln_nis);
1316 if (ni->ni_cpts) {
1317 lnet_ni_addref_locked(ni, 0);
1318 list_add_tail(&ni->ni_cptlist, &the_lnet.ln_nis_cpt);
1319 }
1320
1321 lnet_net_unlock(LNET_LOCK_EX);
1322
1323 if (lnd->lnd_type == LOLND) {
1324 lnet_ni_addref(ni);
1325 LASSERT(!the_lnet.ln_loni);
1326 the_lnet.ln_loni = ni;
1327 return 0;
1328 }
1329
1330 if (!ni->ni_peertxcredits || !ni->ni_maxtxcredits) {
1331 LCONSOLE_ERROR_MSG(0x107, "LNI %s has no %scredits\n",
1332 libcfs_lnd2str(lnd->lnd_type),
1333 !ni->ni_peertxcredits ?
1334 "" : "per-peer ");
1335
1336
1337
1338
1339 lnet_shutdown_lndni(ni);
1340 return -EINVAL;
1341 }
1342
1343 cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
1344 tq->tq_credits_min =
1345 tq->tq_credits_max =
1346 tq->tq_credits = lnet_ni_tq_credits(ni);
1347 }
1348
1349 CDEBUG(D_LNI, "Added LNI %s [%d/%d/%d/%d]\n",
1350 libcfs_nid2str(ni->ni_nid), ni->ni_peertxcredits,
1351 lnet_ni_tq_credits(ni) * LNET_CPT_NUMBER,
1352 ni->ni_peerrtrcredits, ni->ni_peertimeout);
1353
1354 return 0;
1355failed0:
1356 lnet_ni_free(ni);
1357 return rc;
1358}
1359
1360static int
1361lnet_startup_lndnis(struct list_head *nilist)
1362{
1363 struct lnet_ni *ni;
1364 int rc;
1365 int ni_count = 0;
1366
1367 while (!list_empty(nilist)) {
1368 ni = list_entry(nilist->next, lnet_ni_t, ni_list);
1369 list_del(&ni->ni_list);
1370 rc = lnet_startup_lndni(ni, -1, -1, -1, -1);
1371
1372 if (rc < 0)
1373 goto failed;
1374
1375 ni_count++;
1376 }
1377
1378 return ni_count;
1379failed:
1380 lnet_shutdown_lndnis();
1381
1382 return rc;
1383}
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395int lnet_lib_init(void)
1396{
1397 int rc;
1398
1399 lnet_assert_wire_constants();
1400
1401 memset(&the_lnet, 0, sizeof(the_lnet));
1402
1403
1404 the_lnet.ln_cpt_table = cfs_cpt_table;
1405 the_lnet.ln_cpt_number = cfs_cpt_number(cfs_cpt_table);
1406
1407 LASSERT(the_lnet.ln_cpt_number > 0);
1408 if (the_lnet.ln_cpt_number > LNET_CPT_MAX) {
1409
1410 CERROR("Can't have %d CPTs for LNet (max allowed is %d), please change setting of CPT-table and retry\n",
1411 the_lnet.ln_cpt_number, LNET_CPT_MAX);
1412 return -E2BIG;
1413 }
1414
1415 while ((1 << the_lnet.ln_cpt_bits) < the_lnet.ln_cpt_number)
1416 the_lnet.ln_cpt_bits++;
1417
1418 rc = lnet_create_locks();
1419 if (rc) {
1420 CERROR("Can't create LNet global locks: %d\n", rc);
1421 return rc;
1422 }
1423
1424 the_lnet.ln_refcount = 0;
1425 LNetInvalidateHandle(&the_lnet.ln_rc_eqh);
1426 INIT_LIST_HEAD(&the_lnet.ln_lnds);
1427 INIT_LIST_HEAD(&the_lnet.ln_rcd_zombie);
1428 INIT_LIST_HEAD(&the_lnet.ln_rcd_deathrow);
1429
1430
1431
1432
1433
1434
1435 if (rnet_htable_size <= 0)
1436 rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT;
1437 else if (rnet_htable_size > LNET_REMOTE_NETS_HASH_MAX)
1438 rnet_htable_size = LNET_REMOTE_NETS_HASH_MAX;
1439 the_lnet.ln_remote_nets_hbits = max_t(int, 1,
1440 order_base_2(rnet_htable_size) - 1);
1441
1442
1443
1444
1445
1446
1447 lnet_register_lnd(&the_lolnd);
1448 return 0;
1449}
1450
1451
1452
1453
1454
1455
1456
1457void lnet_lib_exit(void)
1458{
1459 LASSERT(!the_lnet.ln_refcount);
1460
1461 while (!list_empty(&the_lnet.ln_lnds))
1462 lnet_unregister_lnd(list_entry(the_lnet.ln_lnds.next,
1463 lnd_t, lnd_list));
1464 lnet_destroy_locks();
1465}
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482int
1483LNetNIInit(lnet_pid_t requested_pid)
1484{
1485 int im_a_router = 0;
1486 int rc;
1487 int ni_count;
1488 lnet_ping_info_t *pinfo;
1489 lnet_handle_md_t md_handle;
1490 struct list_head net_head;
1491
1492 INIT_LIST_HEAD(&net_head);
1493
1494 mutex_lock(&the_lnet.ln_api_mutex);
1495
1496 CDEBUG(D_OTHER, "refs %d\n", the_lnet.ln_refcount);
1497
1498 if (the_lnet.ln_refcount > 0) {
1499 rc = the_lnet.ln_refcount++;
1500 mutex_unlock(&the_lnet.ln_api_mutex);
1501 return rc;
1502 }
1503
1504 rc = lnet_prepare(requested_pid);
1505 if (rc) {
1506 mutex_unlock(&the_lnet.ln_api_mutex);
1507 return rc;
1508 }
1509
1510
1511 if (!lnet_ni_alloc(LNET_MKNET(LOLND, 0), NULL, &net_head)) {
1512 rc = -ENOMEM;
1513 goto err_empty_list;
1514 }
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524 if (!the_lnet.ln_nis_from_mod_params) {
1525 rc = lnet_parse_networks(&net_head, lnet_get_networks());
1526 if (rc < 0)
1527 goto err_empty_list;
1528 }
1529
1530 ni_count = lnet_startup_lndnis(&net_head);
1531 if (ni_count < 0) {
1532 rc = ni_count;
1533 goto err_empty_list;
1534 }
1535
1536 if (!the_lnet.ln_nis_from_mod_params) {
1537 rc = lnet_parse_routes(lnet_get_routes(), &im_a_router);
1538 if (rc)
1539 goto err_shutdown_lndnis;
1540
1541 rc = lnet_check_routes();
1542 if (rc)
1543 goto err_destory_routes;
1544
1545 rc = lnet_rtrpools_alloc(im_a_router);
1546 if (rc)
1547 goto err_destory_routes;
1548 }
1549
1550 rc = lnet_acceptor_start();
1551 if (rc)
1552 goto err_destory_routes;
1553
1554 the_lnet.ln_refcount = 1;
1555
1556
1557 rc = lnet_ping_info_setup(&pinfo, &md_handle, ni_count, true);
1558 if (rc)
1559 goto err_acceptor_stop;
1560
1561 lnet_ping_target_update(pinfo, md_handle);
1562
1563 rc = lnet_router_checker_start();
1564 if (rc)
1565 goto err_stop_ping;
1566
1567 lnet_fault_init();
1568 lnet_router_debugfs_init();
1569
1570 mutex_unlock(&the_lnet.ln_api_mutex);
1571
1572 return 0;
1573
1574err_stop_ping:
1575 lnet_ping_target_fini();
1576err_acceptor_stop:
1577 the_lnet.ln_refcount = 0;
1578 lnet_acceptor_stop();
1579err_destory_routes:
1580 if (!the_lnet.ln_nis_from_mod_params)
1581 lnet_destroy_routes();
1582err_shutdown_lndnis:
1583 lnet_shutdown_lndnis();
1584err_empty_list:
1585 lnet_unprepare();
1586 LASSERT(rc < 0);
1587 mutex_unlock(&the_lnet.ln_api_mutex);
1588 while (!list_empty(&net_head)) {
1589 struct lnet_ni *ni;
1590
1591 ni = list_entry(net_head.next, struct lnet_ni, ni_list);
1592 list_del_init(&ni->ni_list);
1593 lnet_ni_free(ni);
1594 }
1595 return rc;
1596}
1597EXPORT_SYMBOL(LNetNIInit);
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608int
1609LNetNIFini(void)
1610{
1611 mutex_lock(&the_lnet.ln_api_mutex);
1612
1613 LASSERT(the_lnet.ln_refcount > 0);
1614
1615 if (the_lnet.ln_refcount != 1) {
1616 the_lnet.ln_refcount--;
1617 } else {
1618 LASSERT(!the_lnet.ln_niinit_self);
1619
1620 lnet_fault_fini();
1621 lnet_router_debugfs_fini();
1622 lnet_router_checker_stop();
1623 lnet_ping_target_fini();
1624
1625
1626 the_lnet.ln_refcount = 0;
1627
1628 lnet_acceptor_stop();
1629 lnet_destroy_routes();
1630 lnet_shutdown_lndnis();
1631 lnet_unprepare();
1632 }
1633
1634 mutex_unlock(&the_lnet.ln_api_mutex);
1635 return 0;
1636}
1637EXPORT_SYMBOL(LNetNIFini);
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652static void
1653lnet_fill_ni_info(struct lnet_ni *ni, __u32 *cpt_count, __u64 *nid,
1654 int *peer_timeout, int *peer_tx_credits,
1655 int *peer_rtr_credits, int *max_tx_credits,
1656 struct lnet_ioctl_net_config *net_config)
1657{
1658 int i;
1659
1660 if (!ni)
1661 return;
1662
1663 if (!net_config)
1664 return;
1665
1666 BUILD_BUG_ON(ARRAY_SIZE(ni->ni_interfaces) !=
1667 ARRAY_SIZE(net_config->ni_interfaces));
1668
1669 for (i = 0; i < ARRAY_SIZE(ni->ni_interfaces); i++) {
1670 if (!ni->ni_interfaces[i])
1671 break;
1672
1673 strncpy(net_config->ni_interfaces[i],
1674 ni->ni_interfaces[i],
1675 sizeof(net_config->ni_interfaces[i]));
1676 }
1677
1678 *nid = ni->ni_nid;
1679 *peer_timeout = ni->ni_peertimeout;
1680 *peer_tx_credits = ni->ni_peertxcredits;
1681 *peer_rtr_credits = ni->ni_peerrtrcredits;
1682 *max_tx_credits = ni->ni_maxtxcredits;
1683
1684 net_config->ni_status = ni->ni_status->ns_status;
1685
1686 if (ni->ni_cpts) {
1687 int num_cpts = min(ni->ni_ncpts, LNET_MAX_SHOW_NUM_CPT);
1688
1689 for (i = 0; i < num_cpts; i++)
1690 net_config->ni_cpts[i] = ni->ni_cpts[i];
1691
1692 *cpt_count = num_cpts;
1693 }
1694}
1695
1696int
1697lnet_get_net_config(int idx, __u32 *cpt_count, __u64 *nid, int *peer_timeout,
1698 int *peer_tx_credits, int *peer_rtr_credits,
1699 int *max_tx_credits,
1700 struct lnet_ioctl_net_config *net_config)
1701{
1702 struct lnet_ni *ni;
1703 struct list_head *tmp;
1704 int cpt, i = 0;
1705 int rc = -ENOENT;
1706
1707 cpt = lnet_net_lock_current();
1708
1709 list_for_each(tmp, &the_lnet.ln_nis) {
1710 if (i++ != idx)
1711 continue;
1712
1713 ni = list_entry(tmp, lnet_ni_t, ni_list);
1714 lnet_ni_lock(ni);
1715 lnet_fill_ni_info(ni, cpt_count, nid, peer_timeout,
1716 peer_tx_credits, peer_rtr_credits,
1717 max_tx_credits, net_config);
1718 lnet_ni_unlock(ni);
1719 rc = 0;
1720 break;
1721 }
1722
1723 lnet_net_unlock(cpt);
1724 return rc;
1725}
1726
1727int
1728lnet_dyn_add_ni(lnet_pid_t requested_pid, char *nets,
1729 __s32 peer_timeout, __s32 peer_cr, __s32 peer_buf_cr,
1730 __s32 credits)
1731{
1732 lnet_ping_info_t *pinfo;
1733 lnet_handle_md_t md_handle;
1734 struct lnet_ni *ni;
1735 struct list_head net_head;
1736 lnet_remotenet_t *rnet;
1737 int rc;
1738
1739 INIT_LIST_HEAD(&net_head);
1740
1741
1742 rc = lnet_parse_networks(&net_head, nets);
1743 if (rc <= 0)
1744 return !rc ? -EINVAL : rc;
1745
1746 mutex_lock(&the_lnet.ln_api_mutex);
1747
1748 if (rc > 1) {
1749 rc = -EINVAL;
1750 goto failed0;
1751 }
1752
1753 ni = list_entry(net_head.next, struct lnet_ni, ni_list);
1754
1755 lnet_net_lock(LNET_LOCK_EX);
1756 rnet = lnet_find_net_locked(LNET_NIDNET(ni->ni_nid));
1757 lnet_net_unlock(LNET_LOCK_EX);
1758
1759
1760
1761
1762 if (rnet) {
1763 CERROR("Adding net %s will invalidate routing configuration\n",
1764 nets);
1765 rc = -EUSERS;
1766 goto failed0;
1767 }
1768
1769 rc = lnet_ping_info_setup(&pinfo, &md_handle, 1 + lnet_get_ni_count(),
1770 false);
1771 if (rc)
1772 goto failed0;
1773
1774 list_del_init(&ni->ni_list);
1775
1776 rc = lnet_startup_lndni(ni, peer_timeout, peer_cr,
1777 peer_buf_cr, credits);
1778 if (rc)
1779 goto failed1;
1780
1781 if (ni->ni_lnd->lnd_accept) {
1782 rc = lnet_acceptor_start();
1783 if (rc < 0) {
1784
1785 CERROR("Failed to start up acceptor thread\n");
1786 lnet_shutdown_lndni(ni);
1787 goto failed1;
1788 }
1789 }
1790
1791 lnet_ping_target_update(pinfo, md_handle);
1792 mutex_unlock(&the_lnet.ln_api_mutex);
1793
1794 return 0;
1795
1796failed1:
1797 lnet_ping_md_unlink(pinfo, &md_handle);
1798 lnet_ping_info_free(pinfo);
1799failed0:
1800 mutex_unlock(&the_lnet.ln_api_mutex);
1801 while (!list_empty(&net_head)) {
1802 ni = list_entry(net_head.next, struct lnet_ni, ni_list);
1803 list_del_init(&ni->ni_list);
1804 lnet_ni_free(ni);
1805 }
1806 return rc;
1807}
1808
1809int
1810lnet_dyn_del_ni(__u32 net)
1811{
1812 lnet_ni_t *ni;
1813 lnet_ping_info_t *pinfo;
1814 lnet_handle_md_t md_handle;
1815 int rc;
1816
1817
1818 if (LNET_NETTYP(net) == LOLND)
1819 return -EINVAL;
1820
1821 mutex_lock(&the_lnet.ln_api_mutex);
1822
1823 rc = lnet_ping_info_setup(&pinfo, &md_handle,
1824 lnet_get_ni_count() - 1, false);
1825 if (rc)
1826 goto out;
1827
1828 ni = lnet_net2ni(net);
1829 if (!ni) {
1830 rc = -EINVAL;
1831 goto failed;
1832 }
1833
1834
1835 lnet_ni_decref_locked(ni, 0);
1836
1837 lnet_shutdown_lndni(ni);
1838
1839 if (!lnet_count_acceptor_nis())
1840 lnet_acceptor_stop();
1841
1842 lnet_ping_target_update(pinfo, md_handle);
1843 goto out;
1844failed:
1845 lnet_ping_md_unlink(pinfo, &md_handle);
1846 lnet_ping_info_free(pinfo);
1847out:
1848 mutex_unlock(&the_lnet.ln_api_mutex);
1849
1850 return rc;
1851}
1852
1853
1854
1855
1856
1857int
1858LNetCtl(unsigned int cmd, void *arg)
1859{
1860 struct libcfs_ioctl_data *data = arg;
1861 struct lnet_ioctl_config_data *config;
1862 lnet_process_id_t id = {0};
1863 lnet_ni_t *ni;
1864 int rc;
1865 unsigned long secs_passed;
1866
1867 switch (cmd) {
1868 case IOC_LIBCFS_GET_NI:
1869 rc = LNetGetId(data->ioc_count, &id);
1870 data->ioc_nid = id.nid;
1871 return rc;
1872
1873 case IOC_LIBCFS_FAIL_NID:
1874 return lnet_fail_nid(data->ioc_nid, data->ioc_count);
1875
1876 case IOC_LIBCFS_ADD_ROUTE:
1877 config = arg;
1878
1879 if (config->cfg_hdr.ioc_len < sizeof(*config))
1880 return -EINVAL;
1881
1882 mutex_lock(&the_lnet.ln_api_mutex);
1883 rc = lnet_add_route(config->cfg_net,
1884 config->cfg_config_u.cfg_route.rtr_hop,
1885 config->cfg_nid,
1886 config->cfg_config_u.cfg_route.rtr_priority);
1887 if (!rc) {
1888 rc = lnet_check_routes();
1889 if (rc)
1890 lnet_del_route(config->cfg_net,
1891 config->cfg_nid);
1892 }
1893 mutex_unlock(&the_lnet.ln_api_mutex);
1894 return rc;
1895
1896 case IOC_LIBCFS_DEL_ROUTE:
1897 config = arg;
1898
1899 if (config->cfg_hdr.ioc_len < sizeof(*config))
1900 return -EINVAL;
1901
1902 mutex_lock(&the_lnet.ln_api_mutex);
1903 rc = lnet_del_route(config->cfg_net, config->cfg_nid);
1904 mutex_unlock(&the_lnet.ln_api_mutex);
1905 return rc;
1906
1907 case IOC_LIBCFS_GET_ROUTE:
1908 config = arg;
1909
1910 if (config->cfg_hdr.ioc_len < sizeof(*config))
1911 return -EINVAL;
1912
1913 return lnet_get_route(config->cfg_count,
1914 &config->cfg_net,
1915 &config->cfg_config_u.cfg_route.rtr_hop,
1916 &config->cfg_nid,
1917 &config->cfg_config_u.cfg_route.rtr_flags,
1918 &config->cfg_config_u.cfg_route.rtr_priority);
1919
1920 case IOC_LIBCFS_GET_NET: {
1921 struct lnet_ioctl_net_config *net_config;
1922 size_t total = sizeof(*config) + sizeof(*net_config);
1923
1924 config = arg;
1925
1926 if (config->cfg_hdr.ioc_len < total)
1927 return -EINVAL;
1928
1929 net_config = (struct lnet_ioctl_net_config *)
1930 config->cfg_bulk;
1931 if (!net_config)
1932 return -EINVAL;
1933
1934 return lnet_get_net_config(config->cfg_count,
1935 &config->cfg_ncpts,
1936 &config->cfg_nid,
1937 &config->cfg_config_u.cfg_net.net_peer_timeout,
1938 &config->cfg_config_u.cfg_net.net_peer_tx_credits,
1939 &config->cfg_config_u.cfg_net.net_peer_rtr_credits,
1940 &config->cfg_config_u.cfg_net.net_max_tx_credits,
1941 net_config);
1942 }
1943
1944 case IOC_LIBCFS_GET_LNET_STATS: {
1945 struct lnet_ioctl_lnet_stats *lnet_stats = arg;
1946
1947 if (lnet_stats->st_hdr.ioc_len < sizeof(*lnet_stats))
1948 return -EINVAL;
1949
1950 lnet_counters_get(&lnet_stats->st_cntrs);
1951 return 0;
1952 }
1953
1954 case IOC_LIBCFS_CONFIG_RTR:
1955 config = arg;
1956
1957 if (config->cfg_hdr.ioc_len < sizeof(*config))
1958 return -EINVAL;
1959
1960 mutex_lock(&the_lnet.ln_api_mutex);
1961 if (config->cfg_config_u.cfg_buffers.buf_enable) {
1962 rc = lnet_rtrpools_enable();
1963 mutex_unlock(&the_lnet.ln_api_mutex);
1964 return rc;
1965 }
1966 lnet_rtrpools_disable();
1967 mutex_unlock(&the_lnet.ln_api_mutex);
1968 return 0;
1969
1970 case IOC_LIBCFS_ADD_BUF:
1971 config = arg;
1972
1973 if (config->cfg_hdr.ioc_len < sizeof(*config))
1974 return -EINVAL;
1975
1976 mutex_lock(&the_lnet.ln_api_mutex);
1977 rc = lnet_rtrpools_adjust(config->cfg_config_u.cfg_buffers.buf_tiny,
1978 config->cfg_config_u.cfg_buffers.buf_small,
1979 config->cfg_config_u.cfg_buffers.buf_large);
1980 mutex_unlock(&the_lnet.ln_api_mutex);
1981 return rc;
1982
1983 case IOC_LIBCFS_GET_BUF: {
1984 struct lnet_ioctl_pool_cfg *pool_cfg;
1985 size_t total = sizeof(*config) + sizeof(*pool_cfg);
1986
1987 config = arg;
1988
1989 if (config->cfg_hdr.ioc_len < total)
1990 return -EINVAL;
1991
1992 pool_cfg = (struct lnet_ioctl_pool_cfg *)config->cfg_bulk;
1993 return lnet_get_rtr_pool_cfg(config->cfg_count, pool_cfg);
1994 }
1995
1996 case IOC_LIBCFS_GET_PEER_INFO: {
1997 struct lnet_ioctl_peer *peer_info = arg;
1998
1999 if (peer_info->pr_hdr.ioc_len < sizeof(*peer_info))
2000 return -EINVAL;
2001
2002 return lnet_get_peer_info(peer_info->pr_count,
2003 &peer_info->pr_nid,
2004 peer_info->pr_lnd_u.pr_peer_credits.cr_aliveness,
2005 &peer_info->pr_lnd_u.pr_peer_credits.cr_ncpt,
2006 &peer_info->pr_lnd_u.pr_peer_credits.cr_refcount,
2007 &peer_info->pr_lnd_u.pr_peer_credits.cr_ni_peer_tx_credits,
2008 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_credits,
2009 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_rtr_credits,
2010 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_min_rtr_credits,
2011 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_qnob);
2012 }
2013
2014 case IOC_LIBCFS_NOTIFY_ROUTER:
2015 secs_passed = (ktime_get_real_seconds() - data->ioc_u64[0]);
2016 secs_passed *= msecs_to_jiffies(MSEC_PER_SEC);
2017
2018 return lnet_notify(NULL, data->ioc_nid, data->ioc_flags,
2019 jiffies - secs_passed);
2020
2021 case IOC_LIBCFS_LNET_DIST:
2022 rc = LNetDist(data->ioc_nid, &data->ioc_nid, &data->ioc_u32[1]);
2023 if (rc < 0 && rc != -EHOSTUNREACH)
2024 return rc;
2025
2026 data->ioc_u32[0] = rc;
2027 return 0;
2028
2029 case IOC_LIBCFS_TESTPROTOCOMPAT:
2030 lnet_net_lock(LNET_LOCK_EX);
2031 the_lnet.ln_testprotocompat = data->ioc_flags;
2032 lnet_net_unlock(LNET_LOCK_EX);
2033 return 0;
2034
2035 case IOC_LIBCFS_LNET_FAULT:
2036 return lnet_fault_ctl(data->ioc_flags, data);
2037
2038 case IOC_LIBCFS_PING:
2039 id.nid = data->ioc_nid;
2040 id.pid = data->ioc_u32[0];
2041 rc = lnet_ping(id, data->ioc_u32[1],
2042 data->ioc_pbuf1,
2043 data->ioc_plen1 / sizeof(lnet_process_id_t));
2044 if (rc < 0)
2045 return rc;
2046 data->ioc_count = rc;
2047 return 0;
2048
2049 default:
2050 ni = lnet_net2ni(data->ioc_net);
2051 if (!ni)
2052 return -EINVAL;
2053
2054 if (!ni->ni_lnd->lnd_ctl)
2055 rc = -EINVAL;
2056 else
2057 rc = ni->ni_lnd->lnd_ctl(ni, cmd, arg);
2058
2059 lnet_ni_decref(ni);
2060 return rc;
2061 }
2062
2063}
2064EXPORT_SYMBOL(LNetCtl);
2065
2066void LNetDebugPeer(lnet_process_id_t id)
2067{
2068 lnet_debug_peer(id.nid);
2069}
2070EXPORT_SYMBOL(LNetDebugPeer);
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083int
2084LNetGetId(unsigned int index, lnet_process_id_t *id)
2085{
2086 struct lnet_ni *ni;
2087 struct list_head *tmp;
2088 int cpt;
2089 int rc = -ENOENT;
2090
2091 LASSERT(the_lnet.ln_refcount > 0);
2092
2093 cpt = lnet_net_lock_current();
2094
2095 list_for_each(tmp, &the_lnet.ln_nis) {
2096 if (index--)
2097 continue;
2098
2099 ni = list_entry(tmp, lnet_ni_t, ni_list);
2100
2101 id->nid = ni->ni_nid;
2102 id->pid = the_lnet.ln_pid;
2103 rc = 0;
2104 break;
2105 }
2106
2107 lnet_net_unlock(cpt);
2108 return rc;
2109}
2110EXPORT_SYMBOL(LNetGetId);
2111
2112
2113
2114
2115
2116void
2117LNetSnprintHandle(char *str, int len, lnet_handle_any_t h)
2118{
2119 snprintf(str, len, "%#llx", h.cookie);
2120}
2121EXPORT_SYMBOL(LNetSnprintHandle);
2122
2123static int lnet_ping(lnet_process_id_t id, int timeout_ms,
2124 lnet_process_id_t __user *ids, int n_ids)
2125{
2126 lnet_handle_eq_t eqh;
2127 lnet_handle_md_t mdh;
2128 lnet_event_t event;
2129 lnet_md_t md = { NULL };
2130 int which;
2131 int unlinked = 0;
2132 int replied = 0;
2133 const int a_long_time = 60000;
2134 int infosz;
2135 lnet_ping_info_t *info;
2136 lnet_process_id_t tmpid;
2137 int i;
2138 int nob;
2139 int rc;
2140 int rc2;
2141 sigset_t blocked;
2142
2143 infosz = offsetof(lnet_ping_info_t, pi_ni[n_ids]);
2144
2145 if (n_ids <= 0 ||
2146 id.nid == LNET_NID_ANY ||
2147 timeout_ms > 500000 ||
2148 n_ids > 20)
2149 return -EINVAL;
2150
2151 if (id.pid == LNET_PID_ANY)
2152 id.pid = LNET_PID_LUSTRE;
2153
2154 LIBCFS_ALLOC(info, infosz);
2155 if (!info)
2156 return -ENOMEM;
2157
2158
2159 rc = LNetEQAlloc(2, LNET_EQ_HANDLER_NONE, &eqh);
2160 if (rc) {
2161 CERROR("Can't allocate EQ: %d\n", rc);
2162 goto out_0;
2163 }
2164
2165
2166 md.start = info;
2167 md.length = infosz;
2168 md.threshold = 2;
2169 md.max_size = 0;
2170 md.options = LNET_MD_TRUNCATE;
2171 md.user_ptr = NULL;
2172 md.eq_handle = eqh;
2173
2174 rc = LNetMDBind(md, LNET_UNLINK, &mdh);
2175 if (rc) {
2176 CERROR("Can't bind MD: %d\n", rc);
2177 goto out_1;
2178 }
2179
2180 rc = LNetGet(LNET_NID_ANY, mdh, id,
2181 LNET_RESERVED_PORTAL,
2182 LNET_PROTO_PING_MATCHBITS, 0);
2183
2184 if (rc) {
2185
2186
2187 rc2 = LNetMDUnlink(mdh);
2188 LASSERT(!rc2);
2189
2190
2191 unlinked = 1;
2192 timeout_ms = a_long_time;
2193 }
2194
2195 do {
2196
2197 if (unlinked)
2198 blocked = cfs_block_allsigs();
2199
2200 rc2 = LNetEQPoll(&eqh, 1, timeout_ms, &event, &which);
2201
2202 if (unlinked)
2203 cfs_restore_sigs(blocked);
2204
2205 CDEBUG(D_NET, "poll %d(%d %d)%s\n", rc2,
2206 (rc2 <= 0) ? -1 : event.type,
2207 (rc2 <= 0) ? -1 : event.status,
2208 (rc2 > 0 && event.unlinked) ? " unlinked" : "");
2209
2210 LASSERT(rc2 != -EOVERFLOW);
2211
2212 if (rc2 <= 0 || event.status) {
2213
2214 if (!replied && !rc)
2215 rc = (rc2 < 0) ? rc2 :
2216 !rc2 ? -ETIMEDOUT :
2217 event.status;
2218
2219 if (!unlinked) {
2220
2221 LNetMDUnlink(mdh);
2222
2223 unlinked = 1;
2224 timeout_ms = a_long_time;
2225 } else if (!rc2) {
2226
2227 CWARN("ping %s: late network completion\n",
2228 libcfs_id2str(id));
2229 }
2230 } else if (event.type == LNET_EVENT_REPLY) {
2231 replied = 1;
2232 rc = event.mlength;
2233 }
2234
2235 } while (rc2 <= 0 || !event.unlinked);
2236
2237 if (!replied) {
2238 if (rc >= 0)
2239 CWARN("%s: Unexpected rc >= 0 but no reply!\n",
2240 libcfs_id2str(id));
2241 rc = -EIO;
2242 goto out_1;
2243 }
2244
2245 nob = rc;
2246 LASSERT(nob >= 0 && nob <= infosz);
2247
2248 rc = -EPROTO;
2249
2250 if (nob < 8) {
2251
2252 CERROR("%s: ping info too short %d\n",
2253 libcfs_id2str(id), nob);
2254 goto out_1;
2255 }
2256
2257 if (info->pi_magic == __swab32(LNET_PROTO_PING_MAGIC)) {
2258 lnet_swap_pinginfo(info);
2259 } else if (info->pi_magic != LNET_PROTO_PING_MAGIC) {
2260 CERROR("%s: Unexpected magic %08x\n",
2261 libcfs_id2str(id), info->pi_magic);
2262 goto out_1;
2263 }
2264
2265 if (!(info->pi_features & LNET_PING_FEAT_NI_STATUS)) {
2266 CERROR("%s: ping w/o NI status: 0x%x\n",
2267 libcfs_id2str(id), info->pi_features);
2268 goto out_1;
2269 }
2270
2271 if (nob < offsetof(lnet_ping_info_t, pi_ni[0])) {
2272 CERROR("%s: Short reply %d(%d min)\n", libcfs_id2str(id),
2273 nob, (int)offsetof(lnet_ping_info_t, pi_ni[0]));
2274 goto out_1;
2275 }
2276
2277 if (info->pi_nnis < n_ids)
2278 n_ids = info->pi_nnis;
2279
2280 if (nob < offsetof(lnet_ping_info_t, pi_ni[n_ids])) {
2281 CERROR("%s: Short reply %d(%d expected)\n", libcfs_id2str(id),
2282 nob, (int)offsetof(lnet_ping_info_t, pi_ni[n_ids]));
2283 goto out_1;
2284 }
2285
2286 rc = -EFAULT;
2287
2288 memset(&tmpid, 0, sizeof(tmpid));
2289 for (i = 0; i < n_ids; i++) {
2290 tmpid.pid = info->pi_pid;
2291 tmpid.nid = info->pi_ni[i].ns_nid;
2292 if (copy_to_user(&ids[i], &tmpid, sizeof(tmpid)))
2293 goto out_1;
2294 }
2295 rc = info->pi_nnis;
2296
2297 out_1:
2298 rc2 = LNetEQFree(eqh);
2299 if (rc2)
2300 CERROR("rc2 %d\n", rc2);
2301 LASSERT(!rc2);
2302
2303 out_0:
2304 LIBCFS_FREE(info, infosz);
2305 return rc;
2306}
2307
