]> git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - drivers/staging/lustre/lnet/klnds/socklnd/socklnd.c
projects / mirror_ubuntu-zesty-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
pinctrl: sirf: move sgpio lock into state container
[mirror_ubuntu-zesty-kernel.git] / drivers / staging / lustre / lnet / klnds / socklnd / socklnd.c
1 /*
2 * GPL HEADER START
3 *
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
19 *
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
22 * have any questions.
23 *
24 * GPL HEADER END
25 */
26 /*
27 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
29 *
30 * Copyright (c) 2011, 2012, Intel Corporation.
31 */
32 /*
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
35 *
36 * lnet/klnds/socklnd/socklnd.c
37 *
38 * Author: Zach Brown <zab@zabbo.net>
39 * Author: Peter J. Braam <braam@clusterfs.com>
40 * Author: Phil Schwan <phil@clusterfs.com>
41 * Author: Eric Barton <eric@bartonsoftware.com>
42 */
43
44 #include "socklnd.h"
45
46 static lnd_t the_ksocklnd;
47 ksock_nal_data_t ksocknal_data;
48
49 static ksock_interface_t *
50 ksocknal_ip2iface(lnet_ni_t *ni, __u32 ip)
51 {
52 ksock_net_t *net = ni->ni_data;
53 int i;
54 ksock_interface_t *iface;
55
56 for (i = 0; i < net->ksnn_ninterfaces; i++) {
57 LASSERT(i < LNET_MAX_INTERFACES);
58 iface = &net->ksnn_interfaces[i];
59
60 if (iface->ksni_ipaddr == ip)
61 return iface;
62 }
63
64 return NULL;
65 }
66
67 static ksock_route_t *
68 ksocknal_create_route (__u32 ipaddr, int port)
69 {
70 ksock_route_t *route;
71
72 LIBCFS_ALLOC (route, sizeof (*route));
73 if (route == NULL)
74 return NULL;
75
76 atomic_set (&route->ksnr_refcount, 1);
77 route->ksnr_peer = NULL;
78 route->ksnr_retry_interval = 0; /* OK to connect at any time */
79 route->ksnr_ipaddr = ipaddr;
80 route->ksnr_port = port;
81 route->ksnr_scheduled = 0;
82 route->ksnr_connecting = 0;
83 route->ksnr_connected = 0;
84 route->ksnr_deleted = 0;
85 route->ksnr_conn_count = 0;
86 route->ksnr_share_count = 0;
87
88 return route;
89 }
90
91 void
92 ksocknal_destroy_route (ksock_route_t *route)
93 {
94 LASSERT (atomic_read(&route->ksnr_refcount) == 0);
95
96 if (route->ksnr_peer != NULL)
97 ksocknal_peer_decref(route->ksnr_peer);
98
99 LIBCFS_FREE (route, sizeof (*route));
100 }
101
102 static int
103 ksocknal_create_peer (ksock_peer_t **peerp, lnet_ni_t *ni, lnet_process_id_t id)
104 {
105 ksock_net_t *net = ni->ni_data;
106 ksock_peer_t *peer;
107
108 LASSERT (id.nid != LNET_NID_ANY);
109 LASSERT (id.pid != LNET_PID_ANY);
110 LASSERT (!in_interrupt());
111
112 LIBCFS_ALLOC (peer, sizeof (*peer));
113 if (peer == NULL)
114 return -ENOMEM;
115
116 peer->ksnp_ni = ni;
117 peer->ksnp_id = id;
118 atomic_set (&peer->ksnp_refcount, 1); /* 1 ref for caller */
119 peer->ksnp_closing = 0;
120 peer->ksnp_accepting = 0;
121 peer->ksnp_proto = NULL;
122 peer->ksnp_last_alive = 0;
123 peer->ksnp_zc_next_cookie = SOCKNAL_KEEPALIVE_PING + 1;
124
125 INIT_LIST_HEAD (&peer->ksnp_conns);
126 INIT_LIST_HEAD (&peer->ksnp_routes);
127 INIT_LIST_HEAD (&peer->ksnp_tx_queue);
128 INIT_LIST_HEAD (&peer->ksnp_zc_req_list);
129 spin_lock_init(&peer->ksnp_lock);
130
131 spin_lock_bh(&net->ksnn_lock);
132
133 if (net->ksnn_shutdown) {
134 spin_unlock_bh(&net->ksnn_lock);
135
136 LIBCFS_FREE(peer, sizeof(*peer));
137 CERROR("Can't create peer: network shutdown\n");
138 return -ESHUTDOWN;
139 }
140
141 net->ksnn_npeers++;
142
143 spin_unlock_bh(&net->ksnn_lock);
144
145 *peerp = peer;
146 return 0;
147 }
148
149 void
150 ksocknal_destroy_peer (ksock_peer_t *peer)
151 {
152 ksock_net_t *net = peer->ksnp_ni->ni_data;
153
154 CDEBUG (D_NET, "peer %s %p deleted\n",
155 libcfs_id2str(peer->ksnp_id), peer);
156
157 LASSERT (atomic_read (&peer->ksnp_refcount) == 0);
158 LASSERT (peer->ksnp_accepting == 0);
159 LASSERT (list_empty (&peer->ksnp_conns));
160 LASSERT (list_empty (&peer->ksnp_routes));
161 LASSERT (list_empty (&peer->ksnp_tx_queue));
162 LASSERT (list_empty (&peer->ksnp_zc_req_list));
163
164 LIBCFS_FREE (peer, sizeof (*peer));
165
166 /* NB a peer's connections and routes keep a reference on their peer
167 * until they are destroyed, so we can be assured that _all_ state to
168 * do with this peer has been cleaned up when its refcount drops to
169 * zero. */
170 spin_lock_bh(&net->ksnn_lock);
171 net->ksnn_npeers--;
172 spin_unlock_bh(&net->ksnn_lock);
173 }
174
175 ksock_peer_t *
176 ksocknal_find_peer_locked (lnet_ni_t *ni, lnet_process_id_t id)
177 {
178 struct list_head *peer_list = ksocknal_nid2peerlist(id.nid);
179 struct list_head *tmp;
180 ksock_peer_t *peer;
181
182 list_for_each (tmp, peer_list) {
183
184 peer = list_entry (tmp, ksock_peer_t, ksnp_list);
185
186 LASSERT (!peer->ksnp_closing);
187
188 if (peer->ksnp_ni != ni)
189 continue;
190
191 if (peer->ksnp_id.nid != id.nid ||
192 peer->ksnp_id.pid != id.pid)
193 continue;
194
195 CDEBUG(D_NET, "got peer [%p] -> %s (%d)\n",
196 peer, libcfs_id2str(id),
197 atomic_read(&peer->ksnp_refcount));
198 return peer;
199 }
200 return NULL;
201 }
202
203 ksock_peer_t *
204 ksocknal_find_peer (lnet_ni_t *ni, lnet_process_id_t id)
205 {
206 ksock_peer_t *peer;
207
208 read_lock(&ksocknal_data.ksnd_global_lock);
209 peer = ksocknal_find_peer_locked(ni, id);
210 if (peer != NULL) /* +1 ref for caller? */
211 ksocknal_peer_addref(peer);
212 read_unlock(&ksocknal_data.ksnd_global_lock);
213
214 return peer;
215 }
216
217 static void
218 ksocknal_unlink_peer_locked (ksock_peer_t *peer)
219 {
220 int i;
221 __u32 ip;
222 ksock_interface_t *iface;
223
224 for (i = 0; i < peer->ksnp_n_passive_ips; i++) {
225 LASSERT (i < LNET_MAX_INTERFACES);
226 ip = peer->ksnp_passive_ips[i];
227
228 iface = ksocknal_ip2iface(peer->ksnp_ni, ip);
229 /* All IPs in peer->ksnp_passive_ips[] come from the
230 * interface list, therefore the call must succeed. */
231 LASSERT (iface != NULL);
232
233 CDEBUG(D_NET, "peer=%p iface=%p ksni_nroutes=%d\n",
234 peer, iface, iface->ksni_nroutes);
235 iface->ksni_npeers--;
236 }
237
238 LASSERT (list_empty(&peer->ksnp_conns));
239 LASSERT (list_empty(&peer->ksnp_routes));
240 LASSERT (!peer->ksnp_closing);
241 peer->ksnp_closing = 1;
242 list_del (&peer->ksnp_list);
243 /* lose peerlist's ref */
244 ksocknal_peer_decref(peer);
245 }
246
247 static int
248 ksocknal_get_peer_info (lnet_ni_t *ni, int index,
249 lnet_process_id_t *id, __u32 *myip, __u32 *peer_ip,
250 int *port, int *conn_count, int *share_count)
251 {
252 ksock_peer_t *peer;
253 struct list_head *ptmp;
254 ksock_route_t *route;
255 struct list_head *rtmp;
256 int i;
257 int j;
258 int rc = -ENOENT;
259
260 read_lock(&ksocknal_data.ksnd_global_lock);
261
262 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
263
264 list_for_each (ptmp, &ksocknal_data.ksnd_peers[i]) {
265 peer = list_entry (ptmp, ksock_peer_t, ksnp_list);
266
267 if (peer->ksnp_ni != ni)
268 continue;
269
270 if (peer->ksnp_n_passive_ips == 0 &&
271 list_empty(&peer->ksnp_routes)) {
272 if (index-- > 0)
273 continue;
274
275 *id = peer->ksnp_id;
276 *myip = 0;
277 *peer_ip = 0;
278 *port = 0;
279 *conn_count = 0;
280 *share_count = 0;
281 rc = 0;
282 goto out;
283 }
284
285 for (j = 0; j < peer->ksnp_n_passive_ips; j++) {
286 if (index-- > 0)
287 continue;
288
289 *id = peer->ksnp_id;
290 *myip = peer->ksnp_passive_ips[j];
291 *peer_ip = 0;
292 *port = 0;
293 *conn_count = 0;
294 *share_count = 0;
295 rc = 0;
296 goto out;
297 }
298
299 list_for_each (rtmp, &peer->ksnp_routes) {
300 if (index-- > 0)
301 continue;
302
303 route = list_entry(rtmp, ksock_route_t,
304 ksnr_list);
305
306 *id = peer->ksnp_id;
307 *myip = route->ksnr_myipaddr;
308 *peer_ip = route->ksnr_ipaddr;
309 *port = route->ksnr_port;
310 *conn_count = route->ksnr_conn_count;
311 *share_count = route->ksnr_share_count;
312 rc = 0;
313 goto out;
314 }
315 }
316 }
317 out:
318 read_unlock(&ksocknal_data.ksnd_global_lock);
319 return rc;
320 }
321
322 static void
323 ksocknal_associate_route_conn_locked(ksock_route_t *route, ksock_conn_t *conn)
324 {
325 ksock_peer_t *peer = route->ksnr_peer;
326 int type = conn->ksnc_type;
327 ksock_interface_t *iface;
328
329 conn->ksnc_route = route;
330 ksocknal_route_addref(route);
331
332 if (route->ksnr_myipaddr != conn->ksnc_myipaddr) {
333 if (route->ksnr_myipaddr == 0) {
334 /* route wasn't bound locally yet (the initial route) */
335 CDEBUG(D_NET, "Binding %s %pI4h to %pI4h\n",
336 libcfs_id2str(peer->ksnp_id),
337 &route->ksnr_ipaddr,
338 &conn->ksnc_myipaddr);
339 } else {
340 CDEBUG(D_NET, "Rebinding %s %pI4h from %pI4h to %pI4h\n",
341 libcfs_id2str(peer->ksnp_id),
342 &route->ksnr_ipaddr,
343 &route->ksnr_myipaddr,
344 &conn->ksnc_myipaddr);
345
346 iface = ksocknal_ip2iface(route->ksnr_peer->ksnp_ni,
347 route->ksnr_myipaddr);
348 if (iface != NULL)
349 iface->ksni_nroutes--;
350 }
351 route->ksnr_myipaddr = conn->ksnc_myipaddr;
352 iface = ksocknal_ip2iface(route->ksnr_peer->ksnp_ni,
353 route->ksnr_myipaddr);
354 if (iface != NULL)
355 iface->ksni_nroutes++;
356 }
357
358 route->ksnr_connected |= (1<<type);
359 route->ksnr_conn_count++;
360
361 /* Successful connection => further attempts can
362 * proceed immediately */
363 route->ksnr_retry_interval = 0;
364 }
365
366 static void
367 ksocknal_add_route_locked (ksock_peer_t *peer, ksock_route_t *route)
368 {
369 struct list_head *tmp;
370 ksock_conn_t *conn;
371 ksock_route_t *route2;
372
373 LASSERT (!peer->ksnp_closing);
374 LASSERT (route->ksnr_peer == NULL);
375 LASSERT (!route->ksnr_scheduled);
376 LASSERT (!route->ksnr_connecting);
377 LASSERT (route->ksnr_connected == 0);
378
379 /* LASSERT(unique) */
380 list_for_each(tmp, &peer->ksnp_routes) {
381 route2 = list_entry(tmp, ksock_route_t, ksnr_list);
382
383 if (route2->ksnr_ipaddr == route->ksnr_ipaddr) {
384 CERROR("Duplicate route %s %pI4h\n",
385 libcfs_id2str(peer->ksnp_id),
386 &route->ksnr_ipaddr);
387 LBUG();
388 }
389 }
390
391 route->ksnr_peer = peer;
392 ksocknal_peer_addref(peer);
393 /* peer's routelist takes over my ref on 'route' */
394 list_add_tail(&route->ksnr_list, &peer->ksnp_routes);
395
396 list_for_each(tmp, &peer->ksnp_conns) {
397 conn = list_entry(tmp, ksock_conn_t, ksnc_list);
398
399 if (conn->ksnc_ipaddr != route->ksnr_ipaddr)
400 continue;
401
402 ksocknal_associate_route_conn_locked(route, conn);
403 /* keep going (typed routes) */
404 }
405 }
406
407 static void
408 ksocknal_del_route_locked (ksock_route_t *route)
409 {
410 ksock_peer_t *peer = route->ksnr_peer;
411 ksock_interface_t *iface;
412 ksock_conn_t *conn;
413 struct list_head *ctmp;
414 struct list_head *cnxt;
415
416 LASSERT (!route->ksnr_deleted);
417
418 /* Close associated conns */
419 list_for_each_safe (ctmp, cnxt, &peer->ksnp_conns) {
420 conn = list_entry(ctmp, ksock_conn_t, ksnc_list);
421
422 if (conn->ksnc_route != route)
423 continue;
424
425 ksocknal_close_conn_locked (conn, 0);
426 }
427
428 if (route->ksnr_myipaddr != 0) {
429 iface = ksocknal_ip2iface(route->ksnr_peer->ksnp_ni,
430 route->ksnr_myipaddr);
431 if (iface != NULL)
432 iface->ksni_nroutes--;
433 }
434
435 route->ksnr_deleted = 1;
436 list_del (&route->ksnr_list);
437 ksocknal_route_decref(route); /* drop peer's ref */
438
439 if (list_empty (&peer->ksnp_routes) &&
440 list_empty (&peer->ksnp_conns)) {
441 /* I've just removed the last route to a peer with no active
442 * connections */
443 ksocknal_unlink_peer_locked (peer);
444 }
445 }
446
447 int
448 ksocknal_add_peer (lnet_ni_t *ni, lnet_process_id_t id, __u32 ipaddr, int port)
449 {
450 struct list_head *tmp;
451 ksock_peer_t *peer;
452 ksock_peer_t *peer2;
453 ksock_route_t *route;
454 ksock_route_t *route2;
455 int rc;
456
457 if (id.nid == LNET_NID_ANY ||
458 id.pid == LNET_PID_ANY)
459 return -EINVAL;
460
461 /* Have a brand new peer ready... */
462 rc = ksocknal_create_peer(&peer, ni, id);
463 if (rc != 0)
464 return rc;
465
466 route = ksocknal_create_route (ipaddr, port);
467 if (route == NULL) {
468 ksocknal_peer_decref(peer);
469 return -ENOMEM;
470 }
471
472 write_lock_bh(&ksocknal_data.ksnd_global_lock);
473
474 /* always called with a ref on ni, so shutdown can't have started */
475 LASSERT (((ksock_net_t *) ni->ni_data)->ksnn_shutdown == 0);
476
477 peer2 = ksocknal_find_peer_locked (ni, id);
478 if (peer2 != NULL) {
479 ksocknal_peer_decref(peer);
480 peer = peer2;
481 } else {
482 /* peer table takes my ref on peer */
483 list_add_tail (&peer->ksnp_list,
484 ksocknal_nid2peerlist (id.nid));
485 }
486
487 route2 = NULL;
488 list_for_each (tmp, &peer->ksnp_routes) {
489 route2 = list_entry(tmp, ksock_route_t, ksnr_list);
490
491 if (route2->ksnr_ipaddr == ipaddr)
492 break;
493
494 route2 = NULL;
495 }
496 if (route2 == NULL) {
497 ksocknal_add_route_locked(peer, route);
498 route->ksnr_share_count++;
499 } else {
500 ksocknal_route_decref(route);
501 route2->ksnr_share_count++;
502 }
503
504 write_unlock_bh(&ksocknal_data.ksnd_global_lock);
505
506 return 0;
507 }
508
509 static void
510 ksocknal_del_peer_locked (ksock_peer_t *peer, __u32 ip)
511 {
512 ksock_conn_t *conn;
513 ksock_route_t *route;
514 struct list_head *tmp;
515 struct list_head *nxt;
516 int nshared;
517
518 LASSERT (!peer->ksnp_closing);
519
520 /* Extra ref prevents peer disappearing until I'm done with it */
521 ksocknal_peer_addref(peer);
522
523 list_for_each_safe (tmp, nxt, &peer->ksnp_routes) {
524 route = list_entry(tmp, ksock_route_t, ksnr_list);
525
526 /* no match */
527 if (!(ip == 0 || route->ksnr_ipaddr == ip))
528 continue;
529
530 route->ksnr_share_count = 0;
531 /* This deletes associated conns too */
532 ksocknal_del_route_locked (route);
533 }
534
535 nshared = 0;
536 list_for_each_safe (tmp, nxt, &peer->ksnp_routes) {
537 route = list_entry(tmp, ksock_route_t, ksnr_list);
538 nshared += route->ksnr_share_count;
539 }
540
541 if (nshared == 0) {
542 /* remove everything else if there are no explicit entries
543 * left */
544
545 list_for_each_safe (tmp, nxt, &peer->ksnp_routes) {
546 route = list_entry(tmp, ksock_route_t, ksnr_list);
547
548 /* we should only be removing auto-entries */
549 LASSERT(route->ksnr_share_count == 0);
550 ksocknal_del_route_locked (route);
551 }
552
553 list_for_each_safe (tmp, nxt, &peer->ksnp_conns) {
554 conn = list_entry(tmp, ksock_conn_t, ksnc_list);
555
556 ksocknal_close_conn_locked(conn, 0);
557 }
558 }
559
560 ksocknal_peer_decref(peer);
561 /* NB peer unlinks itself when last conn/route is removed */
562 }
563
564 static int
565 ksocknal_del_peer (lnet_ni_t *ni, lnet_process_id_t id, __u32 ip)
566 {
567 LIST_HEAD (zombies);
568 struct list_head *ptmp;
569 struct list_head *pnxt;
570 ksock_peer_t *peer;
571 int lo;
572 int hi;
573 int i;
574 int rc = -ENOENT;
575
576 write_lock_bh(&ksocknal_data.ksnd_global_lock);
577
578 if (id.nid != LNET_NID_ANY)
579 lo = hi = (int)(ksocknal_nid2peerlist(id.nid) - ksocknal_data.ksnd_peers);
580 else {
581 lo = 0;
582 hi = ksocknal_data.ksnd_peer_hash_size - 1;
583 }
584
585 for (i = lo; i <= hi; i++) {
586 list_for_each_safe (ptmp, pnxt,
587 &ksocknal_data.ksnd_peers[i]) {
588 peer = list_entry (ptmp, ksock_peer_t, ksnp_list);
589
590 if (peer->ksnp_ni != ni)
591 continue;
592
593 if (!((id.nid == LNET_NID_ANY || peer->ksnp_id.nid == id.nid) &&
594 (id.pid == LNET_PID_ANY || peer->ksnp_id.pid == id.pid)))
595 continue;
596
597 ksocknal_peer_addref(peer); /* a ref for me... */
598
599 ksocknal_del_peer_locked (peer, ip);
600
601 if (peer->ksnp_closing &&
602 !list_empty(&peer->ksnp_tx_queue)) {
603 LASSERT (list_empty(&peer->ksnp_conns));
604 LASSERT (list_empty(&peer->ksnp_routes));
605
606 list_splice_init(&peer->ksnp_tx_queue,
607 &zombies);
608 }
609
610 ksocknal_peer_decref(peer); /* ...till here */
611
612 rc = 0; /* matched! */
613 }
614 }
615
616 write_unlock_bh(&ksocknal_data.ksnd_global_lock);
617
618 ksocknal_txlist_done(ni, &zombies, 1);
619
620 return rc;
621 }
622
623 static ksock_conn_t *
624 ksocknal_get_conn_by_idx (lnet_ni_t *ni, int index)
625 {
626 ksock_peer_t *peer;
627 struct list_head *ptmp;
628 ksock_conn_t *conn;
629 struct list_head *ctmp;
630 int i;
631
632 read_lock(&ksocknal_data.ksnd_global_lock);
633
634 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
635 list_for_each (ptmp, &ksocknal_data.ksnd_peers[i]) {
636 peer = list_entry (ptmp, ksock_peer_t, ksnp_list);
637
638 LASSERT (!peer->ksnp_closing);
639
640 if (peer->ksnp_ni != ni)
641 continue;
642
643 list_for_each (ctmp, &peer->ksnp_conns) {
644 if (index-- > 0)
645 continue;
646
647 conn = list_entry (ctmp, ksock_conn_t,
648 ksnc_list);
649 ksocknal_conn_addref(conn);
650 read_unlock(&ksocknal_data.ksnd_global_lock);
651 return conn;
652 }
653 }
654 }
655
656 read_unlock(&ksocknal_data.ksnd_global_lock);
657 return NULL;
658 }
659
660 static ksock_sched_t *
661 ksocknal_choose_scheduler_locked(unsigned int cpt)
662 {
663 struct ksock_sched_info *info = ksocknal_data.ksnd_sched_info[cpt];
664 ksock_sched_t *sched;
665 int i;
666
667 LASSERT(info->ksi_nthreads > 0);
668
669 sched = &info->ksi_scheds[0];
670 /*
671 * NB: it's safe so far, but info->ksi_nthreads could be changed
672 * at runtime when we have dynamic LNet configuration, then we
673 * need to take care of this.
674 */
675 for (i = 1; i < info->ksi_nthreads; i++) {
676 if (sched->kss_nconns > info->ksi_scheds[i].kss_nconns)
677 sched = &info->ksi_scheds[i];
678 }
679
680 return sched;
681 }
682
683 static int
684 ksocknal_local_ipvec (lnet_ni_t *ni, __u32 *ipaddrs)
685 {
686 ksock_net_t *net = ni->ni_data;
687 int i;
688 int nip;
689
690 read_lock(&ksocknal_data.ksnd_global_lock);
691
692 nip = net->ksnn_ninterfaces;
693 LASSERT (nip <= LNET_MAX_INTERFACES);
694
695 /* Only offer interfaces for additional connections if I have
696 * more than one. */
697 if (nip < 2) {
698 read_unlock(&ksocknal_data.ksnd_global_lock);
699 return 0;
700 }
701
702 for (i = 0; i < nip; i++) {
703 ipaddrs[i] = net->ksnn_interfaces[i].ksni_ipaddr;
704 LASSERT (ipaddrs[i] != 0);
705 }
706
707 read_unlock(&ksocknal_data.ksnd_global_lock);
708 return nip;
709 }
710
711 static int
712 ksocknal_match_peerip (ksock_interface_t *iface, __u32 *ips, int nips)
713 {
714 int best_netmatch = 0;
715 int best_xor = 0;
716 int best = -1;
717 int this_xor;
718 int this_netmatch;
719 int i;
720
721 for (i = 0; i < nips; i++) {
722 if (ips[i] == 0)
723 continue;
724
725 this_xor = (ips[i] ^ iface->ksni_ipaddr);
726 this_netmatch = ((this_xor & iface->ksni_netmask) == 0) ? 1 : 0;
727
728 if (!(best < 0 ||
729 best_netmatch < this_netmatch ||
730 (best_netmatch == this_netmatch &&
731 best_xor > this_xor)))
732 continue;
733
734 best = i;
735 best_netmatch = this_netmatch;
736 best_xor = this_xor;
737 }
738
739 LASSERT (best >= 0);
740 return best;
741 }
742
743 static int
744 ksocknal_select_ips(ksock_peer_t *peer, __u32 *peerips, int n_peerips)
745 {
746 rwlock_t *global_lock = &ksocknal_data.ksnd_global_lock;
747 ksock_net_t *net = peer->ksnp_ni->ni_data;
748 ksock_interface_t *iface;
749 ksock_interface_t *best_iface;
750 int n_ips;
751 int i;
752 int j;
753 int k;
754 __u32 ip;
755 __u32 xor;
756 int this_netmatch;
757 int best_netmatch;
758 int best_npeers;
759
760 /* CAVEAT EMPTOR: We do all our interface matching with an
761 * exclusive hold of global lock at IRQ priority. We're only
762 * expecting to be dealing with small numbers of interfaces, so the
763 * O(n**3)-ness shouldn't matter */
764
765 /* Also note that I'm not going to return more than n_peerips
766 * interfaces, even if I have more myself */
767
768 write_lock_bh(global_lock);
769
770 LASSERT (n_peerips <= LNET_MAX_INTERFACES);
771 LASSERT (net->ksnn_ninterfaces <= LNET_MAX_INTERFACES);
772
773 /* Only match interfaces for additional connections
774 * if I have > 1 interface */
775 n_ips = (net->ksnn_ninterfaces < 2) ? 0 :
776 min(n_peerips, net->ksnn_ninterfaces);
777
778 for (i = 0; peer->ksnp_n_passive_ips < n_ips; i++) {
779 /* ^ yes really... */
780
781 /* If we have any new interfaces, first tick off all the
782 * peer IPs that match old interfaces, then choose new
783 * interfaces to match the remaining peer IPS.
784 * We don't forget interfaces we've stopped using; we might
785 * start using them again... */
786
787 if (i < peer->ksnp_n_passive_ips) {
788 /* Old interface. */
789 ip = peer->ksnp_passive_ips[i];
790 best_iface = ksocknal_ip2iface(peer->ksnp_ni, ip);
791
792 } else {
793 /* choose a new interface */
794 LASSERT (i == peer->ksnp_n_passive_ips);
795
796 best_iface = NULL;
797 best_netmatch = 0;
798 best_npeers = 0;
799
800 for (j = 0; j < net->ksnn_ninterfaces; j++) {
801 iface = &net->ksnn_interfaces[j];
802 ip = iface->ksni_ipaddr;
803
804 for (k = 0; k < peer->ksnp_n_passive_ips; k++)
805 if (peer->ksnp_passive_ips[k] == ip)
806 break;
807
808 if (k < peer->ksnp_n_passive_ips) /* using it already */
809 continue;
810
811 k = ksocknal_match_peerip(iface, peerips, n_peerips);
812 xor = (ip ^ peerips[k]);
813 this_netmatch = ((xor & iface->ksni_netmask) == 0) ? 1 : 0;
814
815 if (!(best_iface == NULL ||
816 best_netmatch < this_netmatch ||
817 (best_netmatch == this_netmatch &&
818 best_npeers > iface->ksni_npeers)))
819 continue;
820
821 best_iface = iface;
822 best_netmatch = this_netmatch;
823 best_npeers = iface->ksni_npeers;
824 }
825
826 best_iface->ksni_npeers++;
827 ip = best_iface->ksni_ipaddr;
828 peer->ksnp_passive_ips[i] = ip;
829 peer->ksnp_n_passive_ips = i+1;
830 }
831
832 /* mark the best matching peer IP used */
833 j = ksocknal_match_peerip(best_iface, peerips, n_peerips);
834 peerips[j] = 0;
835 }
836
837 /* Overwrite input peer IP addresses */
838 memcpy(peerips, peer->ksnp_passive_ips, n_ips * sizeof(*peerips));
839
840 write_unlock_bh(global_lock);
841
842 return n_ips;
843 }
844
845 static void
846 ksocknal_create_routes(ksock_peer_t *peer, int port,
847 __u32 *peer_ipaddrs, int npeer_ipaddrs)
848 {
849 ksock_route_t *newroute = NULL;
850 rwlock_t *global_lock = &ksocknal_data.ksnd_global_lock;
851 lnet_ni_t *ni = peer->ksnp_ni;
852 ksock_net_t *net = ni->ni_data;
853 struct list_head *rtmp;
854 ksock_route_t *route;
855 ksock_interface_t *iface;
856 ksock_interface_t *best_iface;
857 int best_netmatch;
858 int this_netmatch;
859 int best_nroutes;
860 int i;
861 int j;
862
863 /* CAVEAT EMPTOR: We do all our interface matching with an
864 * exclusive hold of global lock at IRQ priority. We're only
865 * expecting to be dealing with small numbers of interfaces, so the
866 * O(n**3)-ness here shouldn't matter */
867
868 write_lock_bh(global_lock);
869
870 if (net->ksnn_ninterfaces < 2) {
871 /* Only create additional connections
872 * if I have > 1 interface */
873 write_unlock_bh(global_lock);
874 return;
875 }
876
877 LASSERT (npeer_ipaddrs <= LNET_MAX_INTERFACES);
878
879 for (i = 0; i < npeer_ipaddrs; i++) {
880 if (newroute != NULL) {
881 newroute->ksnr_ipaddr = peer_ipaddrs[i];
882 } else {
883 write_unlock_bh(global_lock);
884
885 newroute = ksocknal_create_route(peer_ipaddrs[i], port);
886 if (newroute == NULL)
887 return;
888
889 write_lock_bh(global_lock);
890 }
891
892 if (peer->ksnp_closing) {
893 /* peer got closed under me */
894 break;
895 }
896
897 /* Already got a route? */
898 route = NULL;
899 list_for_each(rtmp, &peer->ksnp_routes) {
900 route = list_entry(rtmp, ksock_route_t, ksnr_list);
901
902 if (route->ksnr_ipaddr == newroute->ksnr_ipaddr)
903 break;
904
905 route = NULL;
906 }
907 if (route != NULL)
908 continue;
909
910 best_iface = NULL;
911 best_nroutes = 0;
912 best_netmatch = 0;
913
914 LASSERT (net->ksnn_ninterfaces <= LNET_MAX_INTERFACES);
915
916 /* Select interface to connect from */
917 for (j = 0; j < net->ksnn_ninterfaces; j++) {
918 iface = &net->ksnn_interfaces[j];
919
920 /* Using this interface already? */
921 list_for_each(rtmp, &peer->ksnp_routes) {
922 route = list_entry(rtmp, ksock_route_t,
923 ksnr_list);
924
925 if (route->ksnr_myipaddr == iface->ksni_ipaddr)
926 break;
927
928 route = NULL;
929 }
930 if (route != NULL)
931 continue;
932
933 this_netmatch = (((iface->ksni_ipaddr ^
934 newroute->ksnr_ipaddr) &
935 iface->ksni_netmask) == 0) ? 1 : 0;
936
937 if (!(best_iface == NULL ||
938 best_netmatch < this_netmatch ||
939 (best_netmatch == this_netmatch &&
940 best_nroutes > iface->ksni_nroutes)))
941 continue;
942
943 best_iface = iface;
944 best_netmatch = this_netmatch;
945 best_nroutes = iface->ksni_nroutes;
946 }
947
948 if (best_iface == NULL)
949 continue;
950
951 newroute->ksnr_myipaddr = best_iface->ksni_ipaddr;
952 best_iface->ksni_nroutes++;
953
954 ksocknal_add_route_locked(peer, newroute);
955 newroute = NULL;
956 }
957
958 write_unlock_bh(global_lock);
959 if (newroute != NULL)
960 ksocknal_route_decref(newroute);
961 }
962
963 int
964 ksocknal_accept (lnet_ni_t *ni, struct socket *sock)
965 {
966 ksock_connreq_t *cr;
967 int rc;
968 __u32 peer_ip;
969 int peer_port;
970
971 rc = libcfs_sock_getaddr(sock, 1, &peer_ip, &peer_port);
972 LASSERT (rc == 0); /* we succeeded before */
973
974 LIBCFS_ALLOC(cr, sizeof(*cr));
975 if (cr == NULL) {
976 LCONSOLE_ERROR_MSG(0x12f, "Dropping connection request from %pI4h: memory exhausted\n",
977 &peer_ip);
978 return -ENOMEM;
979 }
980
981 lnet_ni_addref(ni);
982 cr->ksncr_ni = ni;
983 cr->ksncr_sock = sock;
984
985 spin_lock_bh(&ksocknal_data.ksnd_connd_lock);
986
987 list_add_tail(&cr->ksncr_list, &ksocknal_data.ksnd_connd_connreqs);
988 wake_up(&ksocknal_data.ksnd_connd_waitq);
989
990 spin_unlock_bh(&ksocknal_data.ksnd_connd_lock);
991 return 0;
992 }
993
994 static int
995 ksocknal_connecting (ksock_peer_t *peer, __u32 ipaddr)
996 {
997 ksock_route_t *route;
998
999 list_for_each_entry (route, &peer->ksnp_routes, ksnr_list) {
1000
1001 if (route->ksnr_ipaddr == ipaddr)
1002 return route->ksnr_connecting;
1003 }
1004 return 0;
1005 }
1006
1007 int
1008 ksocknal_create_conn (lnet_ni_t *ni, ksock_route_t *route,
1009 struct socket *sock, int type)
1010 {
1011 rwlock_t *global_lock = &ksocknal_data.ksnd_global_lock;
1012 LIST_HEAD (zombies);
1013 lnet_process_id_t peerid;
1014 struct list_head *tmp;
1015 __u64 incarnation;
1016 ksock_conn_t *conn;
1017 ksock_conn_t *conn2;
1018 ksock_peer_t *peer = NULL;
1019 ksock_peer_t *peer2;
1020 ksock_sched_t *sched;
1021 ksock_hello_msg_t *hello;
1022 int cpt;
1023 ksock_tx_t *tx;
1024 ksock_tx_t *txtmp;
1025 int rc;
1026 int active;
1027 char *warn = NULL;
1028
1029 active = (route != NULL);
1030
1031 LASSERT (active == (type != SOCKLND_CONN_NONE));
1032
1033 LIBCFS_ALLOC(conn, sizeof(*conn));
1034 if (conn == NULL) {
1035 rc = -ENOMEM;
1036 goto failed_0;
1037 }
1038
1039 conn->ksnc_peer = NULL;
1040 conn->ksnc_route = NULL;
1041 conn->ksnc_sock = sock;
1042 /* 2 ref, 1 for conn, another extra ref prevents socket
1043 * being closed before establishment of connection */
1044 atomic_set (&conn->ksnc_sock_refcount, 2);
1045 conn->ksnc_type = type;
1046 ksocknal_lib_save_callback(sock, conn);
1047 atomic_set (&conn->ksnc_conn_refcount, 1); /* 1 ref for me */
1048
1049 conn->ksnc_rx_ready = 0;
1050 conn->ksnc_rx_scheduled = 0;
1051
1052 INIT_LIST_HEAD (&conn->ksnc_tx_queue);
1053 conn->ksnc_tx_ready = 0;
1054 conn->ksnc_tx_scheduled = 0;
1055 conn->ksnc_tx_carrier = NULL;
1056 atomic_set (&conn->ksnc_tx_nob, 0);
1057
1058 LIBCFS_ALLOC(hello, offsetof(ksock_hello_msg_t,
1059 kshm_ips[LNET_MAX_INTERFACES]));
1060 if (hello == NULL) {
1061 rc = -ENOMEM;
1062 goto failed_1;
1063 }
1064
1065 /* stash conn's local and remote addrs */
1066 rc = ksocknal_lib_get_conn_addrs (conn);
1067 if (rc != 0)
1068 goto failed_1;
1069
1070 /* Find out/confirm peer's NID and connection type and get the
1071 * vector of interfaces she's willing to let me connect to.
1072 * Passive connections use the listener timeout since the peer sends
1073 * eagerly */
1074
1075 if (active) {
1076 peer = route->ksnr_peer;
1077 LASSERT(ni == peer->ksnp_ni);
1078
1079 /* Active connection sends HELLO eagerly */
1080 hello->kshm_nips = ksocknal_local_ipvec(ni, hello->kshm_ips);
1081 peerid = peer->ksnp_id;
1082
1083 write_lock_bh(global_lock);
1084 conn->ksnc_proto = peer->ksnp_proto;
1085 write_unlock_bh(global_lock);
1086
1087 if (conn->ksnc_proto == NULL) {
1088 conn->ksnc_proto = &ksocknal_protocol_v3x;
1089 #if SOCKNAL_VERSION_DEBUG
1090 if (*ksocknal_tunables.ksnd_protocol == 2)
1091 conn->ksnc_proto = &ksocknal_protocol_v2x;
1092 else if (*ksocknal_tunables.ksnd_protocol == 1)
1093 conn->ksnc_proto = &ksocknal_protocol_v1x;
1094 #endif
1095 }
1096
1097 rc = ksocknal_send_hello (ni, conn, peerid.nid, hello);
1098 if (rc != 0)
1099 goto failed_1;
1100 } else {
1101 peerid.nid = LNET_NID_ANY;
1102 peerid.pid = LNET_PID_ANY;
1103
1104 /* Passive, get protocol from peer */
1105 conn->ksnc_proto = NULL;
1106 }
1107
1108 rc = ksocknal_recv_hello (ni, conn, hello, &peerid, &incarnation);
1109 if (rc < 0)
1110 goto failed_1;
1111
1112 LASSERT (rc == 0 || active);
1113 LASSERT (conn->ksnc_proto != NULL);
1114 LASSERT (peerid.nid != LNET_NID_ANY);
1115
1116 cpt = lnet_cpt_of_nid(peerid.nid);
1117
1118 if (active) {
1119 ksocknal_peer_addref(peer);
1120 write_lock_bh(global_lock);
1121 } else {
1122 rc = ksocknal_create_peer(&peer, ni, peerid);
1123 if (rc != 0)
1124 goto failed_1;
1125
1126 write_lock_bh(global_lock);
1127
1128 /* called with a ref on ni, so shutdown can't have started */
1129 LASSERT (((ksock_net_t *) ni->ni_data)->ksnn_shutdown == 0);
1130
1131 peer2 = ksocknal_find_peer_locked(ni, peerid);
1132 if (peer2 == NULL) {
1133 /* NB this puts an "empty" peer in the peer
1134 * table (which takes my ref) */
1135 list_add_tail(&peer->ksnp_list,
1136 ksocknal_nid2peerlist(peerid.nid));
1137 } else {
1138 ksocknal_peer_decref(peer);
1139 peer = peer2;
1140 }
1141
1142 /* +1 ref for me */
1143 ksocknal_peer_addref(peer);
1144 peer->ksnp_accepting++;
1145
1146 /* Am I already connecting to this guy? Resolve in
1147 * favour of higher NID... */
1148 if (peerid.nid < ni->ni_nid &&
1149 ksocknal_connecting(peer, conn->ksnc_ipaddr)) {
1150 rc = EALREADY;
1151 warn = "connection race resolution";
1152 goto failed_2;
1153 }
1154 }
1155
1156 if (peer->ksnp_closing ||
1157 (active && route->ksnr_deleted)) {
1158 /* peer/route got closed under me */
1159 rc = -ESTALE;
1160 warn = "peer/route removed";
1161 goto failed_2;
1162 }
1163
1164 if (peer->ksnp_proto == NULL) {
1165 /* Never connected before.
1166 * NB recv_hello may have returned EPROTO to signal my peer
1167 * wants a different protocol than the one I asked for.
1168 */
1169 LASSERT (list_empty(&peer->ksnp_conns));
1170
1171 peer->ksnp_proto = conn->ksnc_proto;
1172 peer->ksnp_incarnation = incarnation;
1173 }
1174
1175 if (peer->ksnp_proto != conn->ksnc_proto ||
1176 peer->ksnp_incarnation != incarnation) {
1177 /* Peer rebooted or I've got the wrong protocol version */
1178 ksocknal_close_peer_conns_locked(peer, 0, 0);
1179
1180 peer->ksnp_proto = NULL;
1181 rc = ESTALE;
1182 warn = peer->ksnp_incarnation != incarnation ?
1183 "peer rebooted" :
1184 "wrong proto version";
1185 goto failed_2;
1186 }
1187
1188 switch (rc) {
1189 default:
1190 LBUG();
1191 case 0:
1192 break;
1193 case EALREADY:
1194 warn = "lost conn race";
1195 goto failed_2;
1196 case EPROTO:
1197 warn = "retry with different protocol version";
1198 goto failed_2;
1199 }
1200
1201 /* Refuse to duplicate an existing connection, unless this is a
1202 * loopback connection */
1203 if (conn->ksnc_ipaddr != conn->ksnc_myipaddr) {
1204 list_for_each(tmp, &peer->ksnp_conns) {
1205 conn2 = list_entry(tmp, ksock_conn_t, ksnc_list);
1206
1207 if (conn2->ksnc_ipaddr != conn->ksnc_ipaddr ||
1208 conn2->ksnc_myipaddr != conn->ksnc_myipaddr ||
1209 conn2->ksnc_type != conn->ksnc_type)
1210 continue;
1211
1212 /* Reply on a passive connection attempt so the peer
1213 * realises we're connected. */
1214 LASSERT (rc == 0);
1215 if (!active)
1216 rc = EALREADY;
1217
1218 warn = "duplicate";
1219 goto failed_2;
1220 }
1221 }
1222
1223 /* If the connection created by this route didn't bind to the IP
1224 * address the route connected to, the connection/route matching
1225 * code below probably isn't going to work. */
1226 if (active &&
1227 route->ksnr_ipaddr != conn->ksnc_ipaddr) {
1228 CERROR("Route %s %pI4h connected to %pI4h\n",
1229 libcfs_id2str(peer->ksnp_id),
1230 &route->ksnr_ipaddr,
1231 &conn->ksnc_ipaddr);
1232 }
1233
1234 /* Search for a route corresponding to the new connection and
1235 * create an association. This allows incoming connections created
1236 * by routes in my peer to match my own route entries so I don't
1237 * continually create duplicate routes. */
1238 list_for_each (tmp, &peer->ksnp_routes) {
1239 route = list_entry(tmp, ksock_route_t, ksnr_list);
1240
1241 if (route->ksnr_ipaddr != conn->ksnc_ipaddr)
1242 continue;
1243
1244 ksocknal_associate_route_conn_locked(route, conn);
1245 break;
1246 }
1247
1248 conn->ksnc_peer = peer; /* conn takes my ref on peer */
1249 peer->ksnp_last_alive = cfs_time_current();
1250 peer->ksnp_send_keepalive = 0;
1251 peer->ksnp_error = 0;
1252
1253 sched = ksocknal_choose_scheduler_locked(cpt);
1254 sched->kss_nconns++;
1255 conn->ksnc_scheduler = sched;
1256
1257 conn->ksnc_tx_last_post = cfs_time_current();
1258 /* Set the deadline for the outgoing HELLO to drain */
1259 conn->ksnc_tx_bufnob = sock->sk->sk_wmem_queued;
1260 conn->ksnc_tx_deadline = cfs_time_shift(*ksocknal_tunables.ksnd_timeout);
1261 mb(); /* order with adding to peer's conn list */
1262
1263 list_add (&conn->ksnc_list, &peer->ksnp_conns);
1264 ksocknal_conn_addref(conn);
1265
1266 ksocknal_new_packet(conn, 0);
1267
1268 conn->ksnc_zc_capable = ksocknal_lib_zc_capable(conn);
1269
1270 /* Take packets blocking for this connection. */
1271 list_for_each_entry_safe(tx, txtmp, &peer->ksnp_tx_queue, tx_list) {
1272 if (conn->ksnc_proto->pro_match_tx(conn, tx, tx->tx_nonblk) == SOCKNAL_MATCH_NO)
1273 continue;
1274
1275 list_del (&tx->tx_list);
1276 ksocknal_queue_tx_locked (tx, conn);
1277 }
1278
1279 write_unlock_bh(global_lock);
1280
1281 /* We've now got a new connection. Any errors from here on are just
1282 * like "normal" comms errors and we close the connection normally.
1283 * NB (a) we still have to send the reply HELLO for passive
1284 * connections,
1285 * (b) normal I/O on the conn is blocked until I setup and call the
1286 * socket callbacks.
1287 */
1288
1289 CDEBUG(D_NET, "New conn %s p %d.x %pI4h -> %pI4h/%d incarnation:%lld sched[%d:%d]\n",
1290 libcfs_id2str(peerid), conn->ksnc_proto->pro_version,
1291 &conn->ksnc_myipaddr, &conn->ksnc_ipaddr,
1292 conn->ksnc_port, incarnation, cpt,
1293 (int)(sched - &sched->kss_info->ksi_scheds[0]));
1294
1295 if (active) {
1296 /* additional routes after interface exchange? */
1297 ksocknal_create_routes(peer, conn->ksnc_port,
1298 hello->kshm_ips, hello->kshm_nips);
1299 } else {
1300 hello->kshm_nips = ksocknal_select_ips(peer, hello->kshm_ips,
1301 hello->kshm_nips);
1302 rc = ksocknal_send_hello(ni, conn, peerid.nid, hello);
1303 }
1304
1305 LIBCFS_FREE(hello, offsetof(ksock_hello_msg_t,
1306 kshm_ips[LNET_MAX_INTERFACES]));
1307
1308 /* setup the socket AFTER I've received hello (it disables
1309 * SO_LINGER). I might call back to the acceptor who may want
1310 * to send a protocol version response and then close the
1311 * socket; this ensures the socket only tears down after the
1312 * response has been sent. */
1313 if (rc == 0)
1314 rc = ksocknal_lib_setup_sock(sock);
1315
1316 write_lock_bh(global_lock);
1317
1318 /* NB my callbacks block while I hold ksnd_global_lock */
1319 ksocknal_lib_set_callback(sock, conn);
1320
1321 if (!active)
1322 peer->ksnp_accepting--;
1323
1324 write_unlock_bh(global_lock);
1325
1326 if (rc != 0) {
1327 write_lock_bh(global_lock);
1328 if (!conn->ksnc_closing) {
1329 /* could be closed by another thread */
1330 ksocknal_close_conn_locked(conn, rc);
1331 }
1332 write_unlock_bh(global_lock);
1333 } else if (ksocknal_connsock_addref(conn) == 0) {
1334 /* Allow I/O to proceed. */
1335 ksocknal_read_callback(conn);
1336 ksocknal_write_callback(conn);
1337 ksocknal_connsock_decref(conn);
1338 }
1339
1340 ksocknal_connsock_decref(conn);
1341 ksocknal_conn_decref(conn);
1342 return rc;
1343
1344 failed_2:
1345 if (!peer->ksnp_closing &&
1346 list_empty (&peer->ksnp_conns) &&
1347 list_empty (&peer->ksnp_routes)) {
1348 list_add(&zombies, &peer->ksnp_tx_queue);
1349 list_del_init(&peer->ksnp_tx_queue);
1350 ksocknal_unlink_peer_locked(peer);
1351 }
1352
1353 write_unlock_bh(global_lock);
1354
1355 if (warn != NULL) {
1356 if (rc < 0)
1357 CERROR("Not creating conn %s type %d: %s\n",
1358 libcfs_id2str(peerid), conn->ksnc_type, warn);
1359 else
1360 CDEBUG(D_NET, "Not creating conn %s type %d: %s\n",
1361 libcfs_id2str(peerid), conn->ksnc_type, warn);
1362 }
1363
1364 if (!active) {
1365 if (rc > 0) {
1366 /* Request retry by replying with CONN_NONE
1367 * ksnc_proto has been set already */
1368 conn->ksnc_type = SOCKLND_CONN_NONE;
1369 hello->kshm_nips = 0;
1370 ksocknal_send_hello(ni, conn, peerid.nid, hello);
1371 }
1372
1373 write_lock_bh(global_lock);
1374 peer->ksnp_accepting--;
1375 write_unlock_bh(global_lock);
1376 }
1377
1378 ksocknal_txlist_done(ni, &zombies, 1);
1379 ksocknal_peer_decref(peer);
1380
1381 failed_1:
1382 if (hello != NULL)
1383 LIBCFS_FREE(hello, offsetof(ksock_hello_msg_t,
1384 kshm_ips[LNET_MAX_INTERFACES]));
1385
1386 LIBCFS_FREE (conn, sizeof(*conn));
1387
1388 failed_0:
1389 libcfs_sock_release(sock);
1390 return rc;
1391 }
1392
1393 void
1394 ksocknal_close_conn_locked (ksock_conn_t *conn, int error)
1395 {
1396 /* This just does the immmediate housekeeping, and queues the
1397 * connection for the reaper to terminate.
1398 * Caller holds ksnd_global_lock exclusively in irq context */
1399 ksock_peer_t *peer = conn->ksnc_peer;
1400 ksock_route_t *route;
1401 ksock_conn_t *conn2;
1402 struct list_head *tmp;
1403
1404 LASSERT (peer->ksnp_error == 0);
1405 LASSERT (!conn->ksnc_closing);
1406 conn->ksnc_closing = 1;
1407
1408 /* ksnd_deathrow_conns takes over peer's ref */
1409 list_del (&conn->ksnc_list);
1410
1411 route = conn->ksnc_route;
1412 if (route != NULL) {
1413 /* dissociate conn from route... */
1414 LASSERT (!route->ksnr_deleted);
1415 LASSERT ((route->ksnr_connected & (1 << conn->ksnc_type)) != 0);
1416
1417 conn2 = NULL;
1418 list_for_each(tmp, &peer->ksnp_conns) {
1419 conn2 = list_entry(tmp, ksock_conn_t, ksnc_list);
1420
1421 if (conn2->ksnc_route == route &&
1422 conn2->ksnc_type == conn->ksnc_type)
1423 break;
1424
1425 conn2 = NULL;
1426 }
1427 if (conn2 == NULL)
1428 route->ksnr_connected &= ~(1 << conn->ksnc_type);
1429
1430 conn->ksnc_route = NULL;
1431
1432 #if 0 /* irrelevant with only eager routes */
1433 /* make route least favourite */
1434 list_del (&route->ksnr_list);
1435 list_add_tail (&route->ksnr_list, &peer->ksnp_routes);
1436 #endif
1437 ksocknal_route_decref(route); /* drop conn's ref on route */
1438 }
1439
1440 if (list_empty (&peer->ksnp_conns)) {
1441 /* No more connections to this peer */
1442
1443 if (!list_empty(&peer->ksnp_tx_queue)) {
1444 ksock_tx_t *tx;
1445
1446 LASSERT (conn->ksnc_proto == &ksocknal_protocol_v3x);
1447
1448 /* throw them to the last connection...,
1449 * these TXs will be send to /dev/null by scheduler */
1450 list_for_each_entry(tx, &peer->ksnp_tx_queue,
1451 tx_list)
1452 ksocknal_tx_prep(conn, tx);
1453
1454 spin_lock_bh(&conn->ksnc_scheduler->kss_lock);
1455 list_splice_init(&peer->ksnp_tx_queue,
1456 &conn->ksnc_tx_queue);
1457 spin_unlock_bh(&conn->ksnc_scheduler->kss_lock);
1458 }
1459
1460 peer->ksnp_proto = NULL; /* renegotiate protocol version */
1461 peer->ksnp_error = error; /* stash last conn close reason */
1462
1463 if (list_empty (&peer->ksnp_routes)) {
1464 /* I've just closed last conn belonging to a
1465 * peer with no routes to it */
1466 ksocknal_unlink_peer_locked (peer);
1467 }
1468 }
1469
1470 spin_lock_bh(&ksocknal_data.ksnd_reaper_lock);
1471
1472 list_add_tail(&conn->ksnc_list,
1473 &ksocknal_data.ksnd_deathrow_conns);
1474 wake_up(&ksocknal_data.ksnd_reaper_waitq);
1475
1476 spin_unlock_bh(&ksocknal_data.ksnd_reaper_lock);
1477 }
1478
1479 void
1480 ksocknal_peer_failed (ksock_peer_t *peer)
1481 {
1482 int notify = 0;
1483 unsigned long last_alive = 0;
1484
1485 /* There has been a connection failure or comms error; but I'll only
1486 * tell LNET I think the peer is dead if it's to another kernel and
1487 * there are no connections or connection attempts in existence. */
1488
1489 read_lock(&ksocknal_data.ksnd_global_lock);
1490
1491 if ((peer->ksnp_id.pid & LNET_PID_USERFLAG) == 0 &&
1492 list_empty(&peer->ksnp_conns) &&
1493 peer->ksnp_accepting == 0 &&
1494 ksocknal_find_connecting_route_locked(peer) == NULL) {
1495 notify = 1;
1496 last_alive = peer->ksnp_last_alive;
1497 }
1498
1499 read_unlock(&ksocknal_data.ksnd_global_lock);
1500
1501 if (notify)
1502 lnet_notify (peer->ksnp_ni, peer->ksnp_id.nid, 0,
1503 last_alive);
1504 }
1505
1506 void
1507 ksocknal_finalize_zcreq(ksock_conn_t *conn)
1508 {
1509 ksock_peer_t *peer = conn->ksnc_peer;
1510 ksock_tx_t *tx;
1511 ksock_tx_t *tmp;
1512 LIST_HEAD (zlist);
1513
1514 /* NB safe to finalize TXs because closing of socket will
1515 * abort all buffered data */
1516 LASSERT (conn->ksnc_sock == NULL);
1517
1518 spin_lock(&peer->ksnp_lock);
1519
1520 list_for_each_entry_safe(tx, tmp, &peer->ksnp_zc_req_list, tx_zc_list) {
1521 if (tx->tx_conn != conn)
1522 continue;
1523
1524 LASSERT (tx->tx_msg.ksm_zc_cookies[0] != 0);
1525
1526 tx->tx_msg.ksm_zc_cookies[0] = 0;
1527 tx->tx_zc_aborted = 1; /* mark it as not-acked */
1528 list_del(&tx->tx_zc_list);
1529 list_add(&tx->tx_zc_list, &zlist);
1530 }
1531
1532 spin_unlock(&peer->ksnp_lock);
1533
1534 while (!list_empty(&zlist)) {
1535 tx = list_entry(zlist.next, ksock_tx_t, tx_zc_list);
1536
1537 list_del(&tx->tx_zc_list);
1538 ksocknal_tx_decref(tx);
1539 }
1540 }
1541
1542 void
1543 ksocknal_terminate_conn (ksock_conn_t *conn)
1544 {
1545 /* This gets called by the reaper (guaranteed thread context) to
1546 * disengage the socket from its callbacks and close it.
1547 * ksnc_refcount will eventually hit zero, and then the reaper will
1548 * destroy it. */
1549 ksock_peer_t *peer = conn->ksnc_peer;
1550 ksock_sched_t *sched = conn->ksnc_scheduler;
1551 int failed = 0;
1552
1553 LASSERT(conn->ksnc_closing);
1554
1555 /* wake up the scheduler to "send" all remaining packets to /dev/null */
1556 spin_lock_bh(&sched->kss_lock);
1557
1558 /* a closing conn is always ready to tx */
1559 conn->ksnc_tx_ready = 1;
1560
1561 if (!conn->ksnc_tx_scheduled &&
1562 !list_empty(&conn->ksnc_tx_queue)) {
1563 list_add_tail (&conn->ksnc_tx_list,
1564 &sched->kss_tx_conns);
1565 conn->ksnc_tx_scheduled = 1;
1566 /* extra ref for scheduler */
1567 ksocknal_conn_addref(conn);
1568
1569 wake_up (&sched->kss_waitq);
1570 }
1571
1572 spin_unlock_bh(&sched->kss_lock);
1573
1574 /* serialise with callbacks */
1575 write_lock_bh(&ksocknal_data.ksnd_global_lock);
1576
1577 ksocknal_lib_reset_callback(conn->ksnc_sock, conn);
1578
1579 /* OK, so this conn may not be completely disengaged from its
1580 * scheduler yet, but it _has_ committed to terminate... */
1581 conn->ksnc_scheduler->kss_nconns--;
1582
1583 if (peer->ksnp_error != 0) {
1584 /* peer's last conn closed in error */
1585 LASSERT (list_empty (&peer->ksnp_conns));
1586 failed = 1;
1587 peer->ksnp_error = 0; /* avoid multiple notifications */
1588 }
1589
1590 write_unlock_bh(&ksocknal_data.ksnd_global_lock);
1591
1592 if (failed)
1593 ksocknal_peer_failed(peer);
1594
1595 /* The socket is closed on the final put; either here, or in
1596 * ksocknal_{send,recv}msg(). Since we set up the linger2 option
1597 * when the connection was established, this will close the socket
1598 * immediately, aborting anything buffered in it. Any hung
1599 * zero-copy transmits will therefore complete in finite time. */
1600 ksocknal_connsock_decref(conn);
1601 }
1602
1603 void
1604 ksocknal_queue_zombie_conn (ksock_conn_t *conn)
1605 {
1606 /* Queue the conn for the reaper to destroy */
1607
1608 LASSERT(atomic_read(&conn->ksnc_conn_refcount) == 0);
1609 spin_lock_bh(&ksocknal_data.ksnd_reaper_lock);
1610
1611 list_add_tail(&conn->ksnc_list, &ksocknal_data.ksnd_zombie_conns);
1612 wake_up(&ksocknal_data.ksnd_reaper_waitq);
1613
1614 spin_unlock_bh(&ksocknal_data.ksnd_reaper_lock);
1615 }
1616
1617 void
1618 ksocknal_destroy_conn (ksock_conn_t *conn)
1619 {
1620 unsigned long last_rcv;
1621
1622 /* Final coup-de-grace of the reaper */
1623 CDEBUG (D_NET, "connection %p\n", conn);
1624
1625 LASSERT (atomic_read (&conn->ksnc_conn_refcount) == 0);
1626 LASSERT (atomic_read (&conn->ksnc_sock_refcount) == 0);
1627 LASSERT (conn->ksnc_sock == NULL);
1628 LASSERT (conn->ksnc_route == NULL);
1629 LASSERT (!conn->ksnc_tx_scheduled);
1630 LASSERT (!conn->ksnc_rx_scheduled);
1631 LASSERT (list_empty(&conn->ksnc_tx_queue));
1632
1633 /* complete current receive if any */
1634 switch (conn->ksnc_rx_state) {
1635 case SOCKNAL_RX_LNET_PAYLOAD:
1636 last_rcv = conn->ksnc_rx_deadline -
1637 cfs_time_seconds(*ksocknal_tunables.ksnd_timeout);
1638 CERROR("Completing partial receive from %s[%d], ip %pI4h:%d, with error, wanted: %d, left: %d, last alive is %ld secs ago\n",
1639 libcfs_id2str(conn->ksnc_peer->ksnp_id), conn->ksnc_type,
1640 &conn->ksnc_ipaddr, conn->ksnc_port,
1641 conn->ksnc_rx_nob_wanted, conn->ksnc_rx_nob_left,
1642 cfs_duration_sec(cfs_time_sub(cfs_time_current(),
1643 last_rcv)));
1644 lnet_finalize (conn->ksnc_peer->ksnp_ni,
1645 conn->ksnc_cookie, -EIO);
1646 break;
1647 case SOCKNAL_RX_LNET_HEADER:
1648 if (conn->ksnc_rx_started)
1649 CERROR("Incomplete receive of lnet header from %s, ip %pI4h:%d, with error, protocol: %d.x.\n",
1650 libcfs_id2str(conn->ksnc_peer->ksnp_id),
1651 &conn->ksnc_ipaddr, conn->ksnc_port,
1652 conn->ksnc_proto->pro_version);
1653 break;
1654 case SOCKNAL_RX_KSM_HEADER:
1655 if (conn->ksnc_rx_started)
1656 CERROR("Incomplete receive of ksock message from %s, ip %pI4h:%d, with error, protocol: %d.x.\n",
1657 libcfs_id2str(conn->ksnc_peer->ksnp_id),
1658 &conn->ksnc_ipaddr, conn->ksnc_port,
1659 conn->ksnc_proto->pro_version);
1660 break;
1661 case SOCKNAL_RX_SLOP:
1662 if (conn->ksnc_rx_started)
1663 CERROR("Incomplete receive of slops from %s, ip %pI4h:%d, with error\n",
1664 libcfs_id2str(conn->ksnc_peer->ksnp_id),
1665 &conn->ksnc_ipaddr, conn->ksnc_port);
1666 break;
1667 default:
1668 LBUG ();
1669 break;
1670 }
1671
1672 ksocknal_peer_decref(conn->ksnc_peer);
1673
1674 LIBCFS_FREE (conn, sizeof (*conn));
1675 }
1676
1677 int
1678 ksocknal_close_peer_conns_locked (ksock_peer_t *peer, __u32 ipaddr, int why)
1679 {
1680 ksock_conn_t *conn;
1681 struct list_head *ctmp;
1682 struct list_head *cnxt;
1683 int count = 0;
1684
1685 list_for_each_safe (ctmp, cnxt, &peer->ksnp_conns) {
1686 conn = list_entry (ctmp, ksock_conn_t, ksnc_list);
1687
1688 if (ipaddr == 0 ||
1689 conn->ksnc_ipaddr == ipaddr) {
1690 count++;
1691 ksocknal_close_conn_locked (conn, why);
1692 }
1693 }
1694
1695 return count;
1696 }
1697
1698 int
1699 ksocknal_close_conn_and_siblings (ksock_conn_t *conn, int why)
1700 {
1701 ksock_peer_t *peer = conn->ksnc_peer;
1702 __u32 ipaddr = conn->ksnc_ipaddr;
1703 int count;
1704
1705 write_lock_bh(&ksocknal_data.ksnd_global_lock);
1706
1707 count = ksocknal_close_peer_conns_locked (peer, ipaddr, why);
1708
1709 write_unlock_bh(&ksocknal_data.ksnd_global_lock);
1710
1711 return count;
1712 }
1713
1714 int
1715 ksocknal_close_matching_conns (lnet_process_id_t id, __u32 ipaddr)
1716 {
1717 ksock_peer_t *peer;
1718 struct list_head *ptmp;
1719 struct list_head *pnxt;
1720 int lo;
1721 int hi;
1722 int i;
1723 int count = 0;
1724
1725 write_lock_bh(&ksocknal_data.ksnd_global_lock);
1726
1727 if (id.nid != LNET_NID_ANY)
1728 lo = hi = (int)(ksocknal_nid2peerlist(id.nid) - ksocknal_data.ksnd_peers);
1729 else {
1730 lo = 0;
1731 hi = ksocknal_data.ksnd_peer_hash_size - 1;
1732 }
1733
1734 for (i = lo; i <= hi; i++) {
1735 list_for_each_safe (ptmp, pnxt,
1736 &ksocknal_data.ksnd_peers[i]) {
1737
1738 peer = list_entry (ptmp, ksock_peer_t, ksnp_list);
1739
1740 if (!((id.nid == LNET_NID_ANY || id.nid == peer->ksnp_id.nid) &&
1741 (id.pid == LNET_PID_ANY || id.pid == peer->ksnp_id.pid)))
1742 continue;
1743
1744 count += ksocknal_close_peer_conns_locked (peer, ipaddr, 0);
1745 }
1746 }
1747
1748 write_unlock_bh(&ksocknal_data.ksnd_global_lock);
1749
1750 /* wildcards always succeed */
1751 if (id.nid == LNET_NID_ANY || id.pid == LNET_PID_ANY || ipaddr == 0)
1752 return 0;
1753
1754 if (count == 0)
1755 return -ENOENT;
1756 else
1757 return 0;
1758 }
1759
1760 void
1761 ksocknal_notify (lnet_ni_t *ni, lnet_nid_t gw_nid, int alive)
1762 {
1763 /* The router is telling me she's been notified of a change in
1764 * gateway state.... */
1765 lnet_process_id_t id = {0};
1766
1767 id.nid = gw_nid;
1768 id.pid = LNET_PID_ANY;
1769
1770 CDEBUG (D_NET, "gw %s %s\n", libcfs_nid2str(gw_nid),
1771 alive ? "up" : "down");
1772
1773 if (!alive) {
1774 /* If the gateway crashed, close all open connections... */
1775 ksocknal_close_matching_conns (id, 0);
1776 return;
1777 }
1778
1779 /* ...otherwise do nothing. We can only establish new connections
1780 * if we have autroutes, and these connect on demand. */
1781 }
1782
1783 void
1784 ksocknal_query (lnet_ni_t *ni, lnet_nid_t nid, unsigned long *when)
1785 {
1786 int connect = 1;
1787 unsigned long last_alive = 0;
1788 unsigned long now = cfs_time_current();
1789 ksock_peer_t *peer = NULL;
1790 rwlock_t *glock = &ksocknal_data.ksnd_global_lock;
1791 lnet_process_id_t id = {.nid = nid, .pid = LUSTRE_SRV_LNET_PID};
1792
1793 read_lock(glock);
1794
1795 peer = ksocknal_find_peer_locked(ni, id);
1796 if (peer != NULL) {
1797 struct list_head *tmp;
1798 ksock_conn_t *conn;
1799 int bufnob;
1800
1801 list_for_each (tmp, &peer->ksnp_conns) {
1802 conn = list_entry(tmp, ksock_conn_t, ksnc_list);
1803 bufnob = conn->ksnc_sock->sk->sk_wmem_queued;
1804
1805 if (bufnob < conn->ksnc_tx_bufnob) {
1806 /* something got ACKed */
1807 conn->ksnc_tx_deadline =
1808 cfs_time_shift(*ksocknal_tunables.ksnd_timeout);
1809 peer->ksnp_last_alive = now;
1810 conn->ksnc_tx_bufnob = bufnob;
1811 }
1812 }
1813
1814 last_alive = peer->ksnp_last_alive;
1815 if (ksocknal_find_connectable_route_locked(peer) == NULL)
1816 connect = 0;
1817 }
1818
1819 read_unlock(glock);
1820
1821 if (last_alive != 0)
1822 *when = last_alive;
1823
1824 CDEBUG(D_NET, "Peer %s %p, alive %ld secs ago, connect %d\n",
1825 libcfs_nid2str(nid), peer,
1826 last_alive ? cfs_duration_sec(now - last_alive) : -1,
1827 connect);
1828
1829 if (!connect)
1830 return;
1831
1832 ksocknal_add_peer(ni, id, LNET_NIDADDR(nid), lnet_acceptor_port());
1833
1834 write_lock_bh(glock);
1835
1836 peer = ksocknal_find_peer_locked(ni, id);
1837 if (peer != NULL)
1838 ksocknal_launch_all_connections_locked(peer);
1839
1840 write_unlock_bh(glock);
1841 return;
1842 }
1843
1844 static void
1845 ksocknal_push_peer (ksock_peer_t *peer)
1846 {
1847 int index;
1848 int i;
1849 struct list_head *tmp;
1850 ksock_conn_t *conn;
1851
1852 for (index = 0; ; index++) {
1853 read_lock(&ksocknal_data.ksnd_global_lock);
1854
1855 i = 0;
1856 conn = NULL;
1857
1858 list_for_each (tmp, &peer->ksnp_conns) {
1859 if (i++ == index) {
1860 conn = list_entry (tmp, ksock_conn_t,
1861 ksnc_list);
1862 ksocknal_conn_addref(conn);
1863 break;
1864 }
1865 }
1866
1867 read_unlock(&ksocknal_data.ksnd_global_lock);
1868
1869 if (conn == NULL)
1870 break;
1871
1872 ksocknal_lib_push_conn (conn);
1873 ksocknal_conn_decref(conn);
1874 }
1875 }
1876
1877 static int
1878 ksocknal_push (lnet_ni_t *ni, lnet_process_id_t id)
1879 {
1880 ksock_peer_t *peer;
1881 struct list_head *tmp;
1882 int index;
1883 int i;
1884 int j;
1885 int rc = -ENOENT;
1886
1887 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
1888 for (j = 0; ; j++) {
1889 read_lock(&ksocknal_data.ksnd_global_lock);
1890
1891 index = 0;
1892 peer = NULL;
1893
1894 list_for_each (tmp, &ksocknal_data.ksnd_peers[i]) {
1895 peer = list_entry(tmp, ksock_peer_t,
1896 ksnp_list);
1897
1898 if (!((id.nid == LNET_NID_ANY ||
1899 id.nid == peer->ksnp_id.nid) &&
1900 (id.pid == LNET_PID_ANY ||
1901 id.pid == peer->ksnp_id.pid))) {
1902 peer = NULL;
1903 continue;
1904 }
1905
1906 if (index++ == j) {
1907 ksocknal_peer_addref(peer);
1908 break;
1909 }
1910 }
1911
1912 read_unlock(&ksocknal_data.ksnd_global_lock);
1913
1914 if (peer != NULL) {
1915 rc = 0;
1916 ksocknal_push_peer (peer);
1917 ksocknal_peer_decref(peer);
1918 }
1919 }
1920
1921 }
1922
1923 return rc;
1924 }
1925
1926 static int
1927 ksocknal_add_interface(lnet_ni_t *ni, __u32 ipaddress, __u32 netmask)
1928 {
1929 ksock_net_t *net = ni->ni_data;
1930 ksock_interface_t *iface;
1931 int rc;
1932 int i;
1933 int j;
1934 struct list_head *ptmp;
1935 ksock_peer_t *peer;
1936 struct list_head *rtmp;
1937 ksock_route_t *route;
1938
1939 if (ipaddress == 0 ||
1940 netmask == 0)
1941 return -EINVAL;
1942
1943 write_lock_bh(&ksocknal_data.ksnd_global_lock);
1944
1945 iface = ksocknal_ip2iface(ni, ipaddress);
1946 if (iface != NULL) {
1947 /* silently ignore dups */
1948 rc = 0;
1949 } else if (net->ksnn_ninterfaces == LNET_MAX_INTERFACES) {
1950 rc = -ENOSPC;
1951 } else {
1952 iface = &net->ksnn_interfaces[net->ksnn_ninterfaces++];
1953
1954 iface->ksni_ipaddr = ipaddress;
1955 iface->ksni_netmask = netmask;
1956 iface->ksni_nroutes = 0;
1957 iface->ksni_npeers = 0;
1958
1959 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
1960 list_for_each(ptmp, &ksocknal_data.ksnd_peers[i]) {
1961 peer = list_entry(ptmp, ksock_peer_t,
1962 ksnp_list);
1963
1964 for (j = 0; j < peer->ksnp_n_passive_ips; j++)
1965 if (peer->ksnp_passive_ips[j] == ipaddress)
1966 iface->ksni_npeers++;
1967
1968 list_for_each(rtmp, &peer->ksnp_routes) {
1969 route = list_entry(rtmp,
1970 ksock_route_t,
1971 ksnr_list);
1972
1973 if (route->ksnr_myipaddr == ipaddress)
1974 iface->ksni_nroutes++;
1975 }
1976 }
1977 }
1978
1979 rc = 0;
1980 /* NB only new connections will pay attention to the new interface! */
1981 }
1982
1983 write_unlock_bh(&ksocknal_data.ksnd_global_lock);
1984
1985 return rc;
1986 }
1987
1988 static void
1989 ksocknal_peer_del_interface_locked(ksock_peer_t *peer, __u32 ipaddr)
1990 {
1991 struct list_head *tmp;
1992 struct list_head *nxt;
1993 ksock_route_t *route;
1994 ksock_conn_t *conn;
1995 int i;
1996 int j;
1997
1998 for (i = 0; i < peer->ksnp_n_passive_ips; i++)
1999 if (peer->ksnp_passive_ips[i] == ipaddr) {
2000 for (j = i+1; j < peer->ksnp_n_passive_ips; j++)
2001 peer->ksnp_passive_ips[j-1] =
2002 peer->ksnp_passive_ips[j];
2003 peer->ksnp_n_passive_ips--;
2004 break;
2005 }
2006
2007 list_for_each_safe(tmp, nxt, &peer->ksnp_routes) {
2008 route = list_entry (tmp, ksock_route_t, ksnr_list);
2009
2010 if (route->ksnr_myipaddr != ipaddr)
2011 continue;
2012
2013 if (route->ksnr_share_count != 0) {
2014 /* Manually created; keep, but unbind */
2015 route->ksnr_myipaddr = 0;
2016 } else {
2017 ksocknal_del_route_locked(route);
2018 }
2019 }
2020
2021 list_for_each_safe(tmp, nxt, &peer->ksnp_conns) {
2022 conn = list_entry(tmp, ksock_conn_t, ksnc_list);
2023
2024 if (conn->ksnc_myipaddr == ipaddr)
2025 ksocknal_close_conn_locked (conn, 0);
2026 }
2027 }
2028
2029 static int
2030 ksocknal_del_interface(lnet_ni_t *ni, __u32 ipaddress)
2031 {
2032 ksock_net_t *net = ni->ni_data;
2033 int rc = -ENOENT;
2034 struct list_head *tmp;
2035 struct list_head *nxt;
2036 ksock_peer_t *peer;
2037 __u32 this_ip;
2038 int i;
2039 int j;
2040
2041 write_lock_bh(&ksocknal_data.ksnd_global_lock);
2042
2043 for (i = 0; i < net->ksnn_ninterfaces; i++) {
2044 this_ip = net->ksnn_interfaces[i].ksni_ipaddr;
2045
2046 if (!(ipaddress == 0 ||
2047 ipaddress == this_ip))
2048 continue;
2049
2050 rc = 0;
2051
2052 for (j = i+1; j < net->ksnn_ninterfaces; j++)
2053 net->ksnn_interfaces[j-1] =
2054 net->ksnn_interfaces[j];
2055
2056 net->ksnn_ninterfaces--;
2057
2058 for (j = 0; j < ksocknal_data.ksnd_peer_hash_size; j++) {
2059 list_for_each_safe(tmp, nxt,
2060 &ksocknal_data.ksnd_peers[j]) {
2061 peer = list_entry(tmp, ksock_peer_t,
2062 ksnp_list);
2063
2064 if (peer->ksnp_ni != ni)
2065 continue;
2066
2067 ksocknal_peer_del_interface_locked(peer, this_ip);
2068 }
2069 }
2070 }
2071
2072 write_unlock_bh(&ksocknal_data.ksnd_global_lock);
2073
2074 return rc;
2075 }
2076
2077 int
2078 ksocknal_ctl(lnet_ni_t *ni, unsigned int cmd, void *arg)
2079 {
2080 lnet_process_id_t id = {0};
2081 struct libcfs_ioctl_data *data = arg;
2082 int rc;
2083
2084 switch (cmd) {
2085 case IOC_LIBCFS_GET_INTERFACE: {
2086 ksock_net_t *net = ni->ni_data;
2087 ksock_interface_t *iface;
2088
2089 read_lock(&ksocknal_data.ksnd_global_lock);
2090
2091 if (data->ioc_count >= (__u32)net->ksnn_ninterfaces) {
2092 rc = -ENOENT;
2093 } else {
2094 rc = 0;
2095 iface = &net->ksnn_interfaces[data->ioc_count];
2096
2097 data->ioc_u32[0] = iface->ksni_ipaddr;
2098 data->ioc_u32[1] = iface->ksni_netmask;
2099 data->ioc_u32[2] = iface->ksni_npeers;
2100 data->ioc_u32[3] = iface->ksni_nroutes;
2101 }
2102
2103 read_unlock(&ksocknal_data.ksnd_global_lock);
2104 return rc;
2105 }
2106
2107 case IOC_LIBCFS_ADD_INTERFACE:
2108 return ksocknal_add_interface(ni,
2109 data->ioc_u32[0], /* IP address */
2110 data->ioc_u32[1]); /* net mask */
2111
2112 case IOC_LIBCFS_DEL_INTERFACE:
2113 return ksocknal_del_interface(ni,
2114 data->ioc_u32[0]); /* IP address */
2115
2116 case IOC_LIBCFS_GET_PEER: {
2117 __u32 myip = 0;
2118 __u32 ip = 0;
2119 int port = 0;
2120 int conn_count = 0;
2121 int share_count = 0;
2122
2123 rc = ksocknal_get_peer_info(ni, data->ioc_count,
2124 &id, &myip, &ip, &port,
2125 &conn_count, &share_count);
2126 if (rc != 0)
2127 return rc;
2128
2129 data->ioc_nid = id.nid;
2130 data->ioc_count = share_count;
2131 data->ioc_u32[0] = ip;
2132 data->ioc_u32[1] = port;
2133 data->ioc_u32[2] = myip;
2134 data->ioc_u32[3] = conn_count;
2135 data->ioc_u32[4] = id.pid;
2136 return 0;
2137 }
2138
2139 case IOC_LIBCFS_ADD_PEER:
2140 id.nid = data->ioc_nid;
2141 id.pid = LUSTRE_SRV_LNET_PID;
2142 return ksocknal_add_peer (ni, id,
2143 data->ioc_u32[0], /* IP */
2144 data->ioc_u32[1]); /* port */
2145
2146 case IOC_LIBCFS_DEL_PEER:
2147 id.nid = data->ioc_nid;
2148 id.pid = LNET_PID_ANY;
2149 return ksocknal_del_peer (ni, id,
2150 data->ioc_u32[0]); /* IP */
2151
2152 case IOC_LIBCFS_GET_CONN: {
2153 int txmem;
2154 int rxmem;
2155 int nagle;
2156 ksock_conn_t *conn = ksocknal_get_conn_by_idx (ni, data->ioc_count);
2157
2158 if (conn == NULL)
2159 return -ENOENT;
2160
2161 ksocknal_lib_get_conn_tunables(conn, &txmem, &rxmem, &nagle);
2162
2163 data->ioc_count = txmem;
2164 data->ioc_nid = conn->ksnc_peer->ksnp_id.nid;
2165 data->ioc_flags = nagle;
2166 data->ioc_u32[0] = conn->ksnc_ipaddr;
2167 data->ioc_u32[1] = conn->ksnc_port;
2168 data->ioc_u32[2] = conn->ksnc_myipaddr;
2169 data->ioc_u32[3] = conn->ksnc_type;
2170 data->ioc_u32[4] = conn->ksnc_scheduler->kss_info->ksi_cpt;
2171 data->ioc_u32[5] = rxmem;
2172 data->ioc_u32[6] = conn->ksnc_peer->ksnp_id.pid;
2173 ksocknal_conn_decref(conn);
2174 return 0;
2175 }
2176
2177 case IOC_LIBCFS_CLOSE_CONNECTION:
2178 id.nid = data->ioc_nid;
2179 id.pid = LNET_PID_ANY;
2180 return ksocknal_close_matching_conns (id,
2181 data->ioc_u32[0]);
2182
2183 case IOC_LIBCFS_REGISTER_MYNID:
2184 /* Ignore if this is a noop */
2185 if (data->ioc_nid == ni->ni_nid)
2186 return 0;
2187
2188 CERROR("obsolete IOC_LIBCFS_REGISTER_MYNID: %s(%s)\n",
2189 libcfs_nid2str(data->ioc_nid),
2190 libcfs_nid2str(ni->ni_nid));
2191 return -EINVAL;
2192
2193 case IOC_LIBCFS_PUSH_CONNECTION:
2194 id.nid = data->ioc_nid;
2195 id.pid = LNET_PID_ANY;
2196 return ksocknal_push(ni, id);
2197
2198 default:
2199 return -EINVAL;
2200 }
2201 /* not reached */
2202 }
2203
2204 static void
2205 ksocknal_free_buffers (void)
2206 {
2207 LASSERT (atomic_read(&ksocknal_data.ksnd_nactive_txs) == 0);
2208
2209 if (ksocknal_data.ksnd_sched_info != NULL) {
2210 struct ksock_sched_info *info;
2211 int i;
2212
2213 cfs_percpt_for_each(info, i, ksocknal_data.ksnd_sched_info) {
2214 if (info->ksi_scheds != NULL) {
2215 LIBCFS_FREE(info->ksi_scheds,
2216 info->ksi_nthreads_max *
2217 sizeof(info->ksi_scheds[0]));
2218 }
2219 }
2220 cfs_percpt_free(ksocknal_data.ksnd_sched_info);
2221 }
2222
2223 LIBCFS_FREE (ksocknal_data.ksnd_peers,
2224 sizeof (struct list_head) *
2225 ksocknal_data.ksnd_peer_hash_size);
2226
2227 spin_lock(&ksocknal_data.ksnd_tx_lock);
2228
2229 if (!list_empty(&ksocknal_data.ksnd_idle_noop_txs)) {
2230 struct list_head zlist;
2231 ksock_tx_t *tx;
2232
2233 list_add(&zlist, &ksocknal_data.ksnd_idle_noop_txs);
2234 list_del_init(&ksocknal_data.ksnd_idle_noop_txs);
2235 spin_unlock(&ksocknal_data.ksnd_tx_lock);
2236
2237 while (!list_empty(&zlist)) {
2238 tx = list_entry(zlist.next, ksock_tx_t, tx_list);
2239 list_del(&tx->tx_list);
2240 LIBCFS_FREE(tx, tx->tx_desc_size);
2241 }
2242 } else {
2243 spin_unlock(&ksocknal_data.ksnd_tx_lock);
2244 }
2245 }
2246
2247 static void
2248 ksocknal_base_shutdown(void)
2249 {
2250 struct ksock_sched_info *info;
2251 ksock_sched_t *sched;
2252 int i;
2253 int j;
2254
2255 CDEBUG(D_MALLOC, "before NAL cleanup: kmem %d\n",
2256 atomic_read (&libcfs_kmemory));
2257 LASSERT (ksocknal_data.ksnd_nnets == 0);
2258
2259 switch (ksocknal_data.ksnd_init) {
2260 default:
2261 LASSERT (0);
2262
2263 case SOCKNAL_INIT_ALL:
2264 case SOCKNAL_INIT_DATA:
2265 LASSERT (ksocknal_data.ksnd_peers != NULL);
2266 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
2267 LASSERT (list_empty (&ksocknal_data.ksnd_peers[i]));
2268 }
2269
2270 LASSERT(list_empty(&ksocknal_data.ksnd_nets));
2271 LASSERT (list_empty (&ksocknal_data.ksnd_enomem_conns));
2272 LASSERT (list_empty (&ksocknal_data.ksnd_zombie_conns));
2273 LASSERT (list_empty (&ksocknal_data.ksnd_connd_connreqs));
2274 LASSERT (list_empty (&ksocknal_data.ksnd_connd_routes));
2275
2276 if (ksocknal_data.ksnd_sched_info != NULL) {
2277 cfs_percpt_for_each(info, i,
2278 ksocknal_data.ksnd_sched_info) {
2279 if (info->ksi_scheds == NULL)
2280 continue;
2281
2282 for (j = 0; j < info->ksi_nthreads_max; j++) {
2283
2284 sched = &info->ksi_scheds[j];
2285 LASSERT(list_empty(
2286 &sched->kss_tx_conns));
2287 LASSERT(list_empty(
2288 &sched->kss_rx_conns));
2289 LASSERT(list_empty(
2290 &sched->kss_zombie_noop_txs));
2291 LASSERT(sched->kss_nconns == 0);
2292 }
2293 }
2294 }
2295
2296 /* flag threads to terminate; wake and wait for them to die */
2297 ksocknal_data.ksnd_shuttingdown = 1;
2298 wake_up_all(&ksocknal_data.ksnd_connd_waitq);
2299 wake_up_all(&ksocknal_data.ksnd_reaper_waitq);
2300
2301 if (ksocknal_data.ksnd_sched_info != NULL) {
2302 cfs_percpt_for_each(info, i,
2303 ksocknal_data.ksnd_sched_info) {
2304 if (info->ksi_scheds == NULL)
2305 continue;
2306
2307 for (j = 0; j < info->ksi_nthreads_max; j++) {
2308 sched = &info->ksi_scheds[j];
2309 wake_up_all(&sched->kss_waitq);
2310 }
2311 }
2312 }
2313
2314 i = 4;
2315 read_lock(&ksocknal_data.ksnd_global_lock);
2316 while (ksocknal_data.ksnd_nthreads != 0) {
2317 i++;
2318 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* power of 2? */
2319 "waiting for %d threads to terminate\n",
2320 ksocknal_data.ksnd_nthreads);
2321 read_unlock(&ksocknal_data.ksnd_global_lock);
2322 set_current_state(TASK_UNINTERRUPTIBLE);
2323 schedule_timeout(cfs_time_seconds(1));
2324 read_lock(&ksocknal_data.ksnd_global_lock);
2325 }
2326 read_unlock(&ksocknal_data.ksnd_global_lock);
2327
2328 ksocknal_free_buffers();
2329
2330 ksocknal_data.ksnd_init = SOCKNAL_INIT_NOTHING;
2331 break;
2332 }
2333
2334 CDEBUG(D_MALLOC, "after NAL cleanup: kmem %d\n",
2335 atomic_read (&libcfs_kmemory));
2336
2337 module_put(THIS_MODULE);
2338 }
2339
2340 static __u64
2341 ksocknal_new_incarnation (void)
2342 {
2343
2344 /* The incarnation number is the time this module loaded and it
2345 * identifies this particular instance of the socknal.
2346 */
2347 return ktime_get_ns();
2348 }
2349
2350 static int
2351 ksocknal_base_startup(void)
2352 {
2353 struct ksock_sched_info *info;
2354 int rc;
2355 int i;
2356
2357 LASSERT (ksocknal_data.ksnd_init == SOCKNAL_INIT_NOTHING);
2358 LASSERT (ksocknal_data.ksnd_nnets == 0);
2359
2360 memset (&ksocknal_data, 0, sizeof (ksocknal_data)); /* zero pointers */
2361
2362 ksocknal_data.ksnd_peer_hash_size = SOCKNAL_PEER_HASH_SIZE;
2363 LIBCFS_ALLOC (ksocknal_data.ksnd_peers,
2364 sizeof (struct list_head) *
2365 ksocknal_data.ksnd_peer_hash_size);
2366 if (ksocknal_data.ksnd_peers == NULL)
2367 return -ENOMEM;
2368
2369 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++)
2370 INIT_LIST_HEAD(&ksocknal_data.ksnd_peers[i]);
2371
2372 rwlock_init(&ksocknal_data.ksnd_global_lock);
2373 INIT_LIST_HEAD(&ksocknal_data.ksnd_nets);
2374
2375 spin_lock_init(&ksocknal_data.ksnd_reaper_lock);
2376 INIT_LIST_HEAD (&ksocknal_data.ksnd_enomem_conns);
2377 INIT_LIST_HEAD (&ksocknal_data.ksnd_zombie_conns);
2378 INIT_LIST_HEAD (&ksocknal_data.ksnd_deathrow_conns);
2379 init_waitqueue_head(&ksocknal_data.ksnd_reaper_waitq);
2380
2381 spin_lock_init(&ksocknal_data.ksnd_connd_lock);
2382 INIT_LIST_HEAD (&ksocknal_data.ksnd_connd_connreqs);
2383 INIT_LIST_HEAD (&ksocknal_data.ksnd_connd_routes);
2384 init_waitqueue_head(&ksocknal_data.ksnd_connd_waitq);
2385
2386 spin_lock_init(&ksocknal_data.ksnd_tx_lock);
2387 INIT_LIST_HEAD (&ksocknal_data.ksnd_idle_noop_txs);
2388
2389 /* NB memset above zeros whole of ksocknal_data */
2390
2391 /* flag lists/ptrs/locks initialised */
2392 ksocknal_data.ksnd_init = SOCKNAL_INIT_DATA;
2393 try_module_get(THIS_MODULE);
2394
2395 ksocknal_data.ksnd_sched_info = cfs_percpt_alloc(lnet_cpt_table(),
2396 sizeof(*info));
2397 if (ksocknal_data.ksnd_sched_info == NULL)
2398 goto failed;
2399
2400 cfs_percpt_for_each(info, i, ksocknal_data.ksnd_sched_info) {
2401 ksock_sched_t *sched;
2402 int nthrs;
2403
2404 nthrs = cfs_cpt_weight(lnet_cpt_table(), i);
2405 if (*ksocknal_tunables.ksnd_nscheds > 0) {
2406 nthrs = min(nthrs, *ksocknal_tunables.ksnd_nscheds);
2407 } else {
2408 /* max to half of CPUs, assume another half should be
2409 * reserved for upper layer modules */
2410 nthrs = min(max(SOCKNAL_NSCHEDS, nthrs >> 1), nthrs);
2411 }
2412
2413 info->ksi_nthreads_max = nthrs;
2414 info->ksi_cpt = i;
2415
2416 LIBCFS_CPT_ALLOC(info->ksi_scheds, lnet_cpt_table(), i,
2417 info->ksi_nthreads_max * sizeof(*sched));
2418 if (info->ksi_scheds == NULL)
2419 goto failed;
2420
2421 for (; nthrs > 0; nthrs--) {
2422 sched = &info->ksi_scheds[nthrs - 1];
2423
2424 sched->kss_info = info;
2425 spin_lock_init(&sched->kss_lock);
2426 INIT_LIST_HEAD(&sched->kss_rx_conns);
2427 INIT_LIST_HEAD(&sched->kss_tx_conns);
2428 INIT_LIST_HEAD(&sched->kss_zombie_noop_txs);
2429 init_waitqueue_head(&sched->kss_waitq);
2430 }
2431 }
2432
2433 ksocknal_data.ksnd_connd_starting = 0;
2434 ksocknal_data.ksnd_connd_failed_stamp = 0;
2435 ksocknal_data.ksnd_connd_starting_stamp = get_seconds();
2436 /* must have at least 2 connds to remain responsive to accepts while
2437 * connecting */
2438 if (*ksocknal_tunables.ksnd_nconnds < SOCKNAL_CONND_RESV + 1)
2439 *ksocknal_tunables.ksnd_nconnds = SOCKNAL_CONND_RESV + 1;
2440
2441 if (*ksocknal_tunables.ksnd_nconnds_max <
2442 *ksocknal_tunables.ksnd_nconnds) {
2443 ksocknal_tunables.ksnd_nconnds_max =
2444 ksocknal_tunables.ksnd_nconnds;
2445 }
2446
2447 for (i = 0; i < *ksocknal_tunables.ksnd_nconnds; i++) {
2448 char name[16];
2449 spin_lock_bh(&ksocknal_data.ksnd_connd_lock);
2450 ksocknal_data.ksnd_connd_starting++;
2451 spin_unlock_bh(&ksocknal_data.ksnd_connd_lock);
2452
2453
2454 snprintf(name, sizeof(name), "socknal_cd%02d", i);
2455 rc = ksocknal_thread_start(ksocknal_connd,
2456 (void *)((ulong_ptr_t)i), name);
2457 if (rc != 0) {
2458 spin_lock_bh(&ksocknal_data.ksnd_connd_lock);
2459 ksocknal_data.ksnd_connd_starting--;
2460 spin_unlock_bh(&ksocknal_data.ksnd_connd_lock);
2461 CERROR("Can't spawn socknal connd: %d\n", rc);
2462 goto failed;
2463 }
2464 }
2465
2466 rc = ksocknal_thread_start(ksocknal_reaper, NULL, "socknal_reaper");
2467 if (rc != 0) {
2468 CERROR ("Can't spawn socknal reaper: %d\n", rc);
2469 goto failed;
2470 }
2471
2472 /* flag everything initialised */
2473 ksocknal_data.ksnd_init = SOCKNAL_INIT_ALL;
2474
2475 return 0;
2476
2477 failed:
2478 ksocknal_base_shutdown();
2479 return -ENETDOWN;
2480 }
2481
2482 static void
2483 ksocknal_debug_peerhash (lnet_ni_t *ni)
2484 {
2485 ksock_peer_t *peer = NULL;
2486 struct list_head *tmp;
2487 int i;
2488
2489 read_lock(&ksocknal_data.ksnd_global_lock);
2490
2491 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
2492 list_for_each (tmp, &ksocknal_data.ksnd_peers[i]) {
2493 peer = list_entry (tmp, ksock_peer_t, ksnp_list);
2494
2495 if (peer->ksnp_ni == ni)
2496 break;
2497
2498 peer = NULL;
2499 }
2500 }
2501
2502 if (peer != NULL) {
2503 ksock_route_t *route;
2504 ksock_conn_t *conn;
2505
2506 CWARN("Active peer on shutdown: %s, ref %d, scnt %d, closing %d, accepting %d, err %d, zcookie %llu, txq %d, zc_req %d\n",
2507 libcfs_id2str(peer->ksnp_id),
2508 atomic_read(&peer->ksnp_refcount),
2509 peer->ksnp_sharecount, peer->ksnp_closing,
2510 peer->ksnp_accepting, peer->ksnp_error,
2511 peer->ksnp_zc_next_cookie,
2512 !list_empty(&peer->ksnp_tx_queue),
2513 !list_empty(&peer->ksnp_zc_req_list));
2514
2515 list_for_each (tmp, &peer->ksnp_routes) {
2516 route = list_entry(tmp, ksock_route_t, ksnr_list);
2517 CWARN("Route: ref %d, schd %d, conn %d, cnted %d, del %d\n",
2518 atomic_read(&route->ksnr_refcount),
2519 route->ksnr_scheduled, route->ksnr_connecting,
2520 route->ksnr_connected, route->ksnr_deleted);
2521 }
2522
2523 list_for_each (tmp, &peer->ksnp_conns) {
2524 conn = list_entry(tmp, ksock_conn_t, ksnc_list);
2525 CWARN ("Conn: ref %d, sref %d, t %d, c %d\n",
2526 atomic_read(&conn->ksnc_conn_refcount),
2527 atomic_read(&conn->ksnc_sock_refcount),
2528 conn->ksnc_type, conn->ksnc_closing);
2529 }
2530 }
2531
2532 read_unlock(&ksocknal_data.ksnd_global_lock);
2533 return;
2534 }
2535
2536 void
2537 ksocknal_shutdown (lnet_ni_t *ni)
2538 {
2539 ksock_net_t *net = ni->ni_data;
2540 int i;
2541 lnet_process_id_t anyid = {0};
2542
2543 anyid.nid = LNET_NID_ANY;
2544 anyid.pid = LNET_PID_ANY;
2545
2546 LASSERT(ksocknal_data.ksnd_init == SOCKNAL_INIT_ALL);
2547 LASSERT(ksocknal_data.ksnd_nnets > 0);
2548
2549 spin_lock_bh(&net->ksnn_lock);
2550 net->ksnn_shutdown = 1; /* prevent new peers */
2551 spin_unlock_bh(&net->ksnn_lock);
2552
2553 /* Delete all peers */
2554 ksocknal_del_peer(ni, anyid, 0);
2555
2556 /* Wait for all peer state to clean up */
2557 i = 2;
2558 spin_lock_bh(&net->ksnn_lock);
2559 while (net->ksnn_npeers != 0) {
2560 spin_unlock_bh(&net->ksnn_lock);
2561
2562 i++;
2563 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* power of 2? */
2564 "waiting for %d peers to disconnect\n",
2565 net->ksnn_npeers);
2566 set_current_state(TASK_UNINTERRUPTIBLE);
2567 schedule_timeout(cfs_time_seconds(1));
2568
2569 ksocknal_debug_peerhash(ni);
2570
2571 spin_lock_bh(&net->ksnn_lock);
2572 }
2573 spin_unlock_bh(&net->ksnn_lock);
2574
2575 for (i = 0; i < net->ksnn_ninterfaces; i++) {
2576 LASSERT (net->ksnn_interfaces[i].ksni_npeers == 0);
2577 LASSERT (net->ksnn_interfaces[i].ksni_nroutes == 0);
2578 }
2579
2580 list_del(&net->ksnn_list);
2581 LIBCFS_FREE(net, sizeof(*net));
2582
2583 ksocknal_data.ksnd_nnets--;
2584 if (ksocknal_data.ksnd_nnets == 0)
2585 ksocknal_base_shutdown();
2586 }
2587
2588 static int
2589 ksocknal_enumerate_interfaces(ksock_net_t *net)
2590 {
2591 char **names;
2592 int i;
2593 int j;
2594 int rc;
2595 int n;
2596
2597 n = libcfs_ipif_enumerate(&names);
2598 if (n <= 0) {
2599 CERROR("Can't enumerate interfaces: %d\n", n);
2600 return n;
2601 }
2602
2603 for (i = j = 0; i < n; i++) {
2604 int up;
2605 __u32 ip;
2606 __u32 mask;
2607
2608 if (!strcmp(names[i], "lo")) /* skip the loopback IF */
2609 continue;
2610
2611 rc = libcfs_ipif_query(names[i], &up, &ip, &mask);
2612 if (rc != 0) {
2613 CWARN("Can't get interface %s info: %d\n",
2614 names[i], rc);
2615 continue;
2616 }
2617
2618 if (!up) {
2619 CWARN("Ignoring interface %s (down)\n",
2620 names[i]);
2621 continue;
2622 }
2623
2624 if (j == LNET_MAX_INTERFACES) {
2625 CWARN("Ignoring interface %s (too many interfaces)\n",
2626 names[i]);
2627 continue;
2628 }
2629
2630 net->ksnn_interfaces[j].ksni_ipaddr = ip;
2631 net->ksnn_interfaces[j].ksni_netmask = mask;
2632 strncpy(&net->ksnn_interfaces[j].ksni_name[0],
2633 names[i], IFNAMSIZ);
2634 j++;
2635 }
2636
2637 libcfs_ipif_free_enumeration(names, n);
2638
2639 if (j == 0)
2640 CERROR("Can't find any usable interfaces\n");
2641
2642 return j;
2643 }
2644
2645 static int
2646 ksocknal_search_new_ipif(ksock_net_t *net)
2647 {
2648 int new_ipif = 0;
2649 int i;
2650
2651 for (i = 0; i < net->ksnn_ninterfaces; i++) {
2652 char *ifnam = &net->ksnn_interfaces[i].ksni_name[0];
2653 char *colon = strchr(ifnam, ':');
2654 int found = 0;
2655 ksock_net_t *tmp;
2656 int j;
2657
2658 if (colon != NULL) /* ignore alias device */
2659 *colon = 0;
2660
2661 list_for_each_entry(tmp, &ksocknal_data.ksnd_nets,
2662 ksnn_list) {
2663 for (j = 0; !found && j < tmp->ksnn_ninterfaces; j++) {
2664 char *ifnam2 =
2665 &tmp->ksnn_interfaces[j].ksni_name[0];
2666 char *colon2 = strchr(ifnam2, ':');
2667
2668 if (colon2 != NULL)
2669 *colon2 = 0;
2670
2671 found = strcmp(ifnam, ifnam2) == 0;
2672 if (colon2 != NULL)
2673 *colon2 = ':';
2674 }
2675 if (found)
2676 break;
2677 }
2678
2679 new_ipif += !found;
2680 if (colon != NULL)
2681 *colon = ':';
2682 }
2683
2684 return new_ipif;
2685 }
2686
2687 static int
2688 ksocknal_start_schedulers(struct ksock_sched_info *info)
2689 {
2690 int nthrs;
2691 int rc = 0;
2692 int i;
2693
2694 if (info->ksi_nthreads == 0) {
2695 if (*ksocknal_tunables.ksnd_nscheds > 0) {
2696 nthrs = info->ksi_nthreads_max;
2697 } else {
2698 nthrs = cfs_cpt_weight(lnet_cpt_table(),
2699 info->ksi_cpt);
2700 nthrs = min(max(SOCKNAL_NSCHEDS, nthrs >> 1), nthrs);
2701 nthrs = min(SOCKNAL_NSCHEDS_HIGH, nthrs);
2702 }
2703 nthrs = min(nthrs, info->ksi_nthreads_max);
2704 } else {
2705 LASSERT(info->ksi_nthreads <= info->ksi_nthreads_max);
2706 /* increase two threads if there is new interface */
2707 nthrs = min(2, info->ksi_nthreads_max - info->ksi_nthreads);
2708 }
2709
2710 for (i = 0; i < nthrs; i++) {
2711 long id;
2712 char name[20];
2713 ksock_sched_t *sched;
2714 id = KSOCK_THREAD_ID(info->ksi_cpt, info->ksi_nthreads + i);
2715 sched = &info->ksi_scheds[KSOCK_THREAD_SID(id)];
2716 snprintf(name, sizeof(name), "socknal_sd%02d_%02d",
2717 info->ksi_cpt, (int)(sched - &info->ksi_scheds[0]));
2718
2719 rc = ksocknal_thread_start(ksocknal_scheduler,
2720 (void *)id, name);
2721 if (rc == 0)
2722 continue;
2723
2724 CERROR("Can't spawn thread %d for scheduler[%d]: %d\n",
2725 info->ksi_cpt, info->ksi_nthreads + i, rc);
2726 break;
2727 }
2728
2729 info->ksi_nthreads += i;
2730 return rc;
2731 }
2732
2733 static int
2734 ksocknal_net_start_threads(ksock_net_t *net, __u32 *cpts, int ncpts)
2735 {
2736 int newif = ksocknal_search_new_ipif(net);
2737 int rc;
2738 int i;
2739
2740 LASSERT(ncpts > 0 && ncpts <= cfs_cpt_number(lnet_cpt_table()));
2741
2742 for (i = 0; i < ncpts; i++) {
2743 struct ksock_sched_info *info;
2744 int cpt = (cpts == NULL) ? i : cpts[i];
2745
2746 LASSERT(cpt < cfs_cpt_number(lnet_cpt_table()));
2747 info = ksocknal_data.ksnd_sched_info[cpt];
2748
2749 if (!newif && info->ksi_nthreads > 0)
2750 continue;
2751
2752 rc = ksocknal_start_schedulers(info);
2753 if (rc != 0)
2754 return rc;
2755 }
2756 return 0;
2757 }
2758
2759 int
2760 ksocknal_startup (lnet_ni_t *ni)
2761 {
2762 ksock_net_t *net;
2763 int rc;
2764 int i;
2765
2766 LASSERT (ni->ni_lnd == &the_ksocklnd);
2767
2768 if (ksocknal_data.ksnd_init == SOCKNAL_INIT_NOTHING) {
2769 rc = ksocknal_base_startup();
2770 if (rc != 0)
2771 return rc;
2772 }
2773
2774 LIBCFS_ALLOC(net, sizeof(*net));
2775 if (net == NULL)
2776 goto fail_0;
2777
2778 spin_lock_init(&net->ksnn_lock);
2779 net->ksnn_incarnation = ksocknal_new_incarnation();
2780 ni->ni_data = net;
2781 ni->ni_peertimeout = *ksocknal_tunables.ksnd_peertimeout;
2782 ni->ni_maxtxcredits = *ksocknal_tunables.ksnd_credits;
2783 ni->ni_peertxcredits = *ksocknal_tunables.ksnd_peertxcredits;
2784 ni->ni_peerrtrcredits = *ksocknal_tunables.ksnd_peerrtrcredits;
2785
2786 if (ni->ni_interfaces[0] == NULL) {
2787 rc = ksocknal_enumerate_interfaces(net);
2788 if (rc <= 0)
2789 goto fail_1;
2790
2791 net->ksnn_ninterfaces = 1;
2792 } else {
2793 for (i = 0; i < LNET_MAX_INTERFACES; i++) {
2794 int up;
2795
2796 if (ni->ni_interfaces[i] == NULL)
2797 break;
2798
2799 rc = libcfs_ipif_query(
2800 ni->ni_interfaces[i], &up,
2801 &net->ksnn_interfaces[i].ksni_ipaddr,
2802 &net->ksnn_interfaces[i].ksni_netmask);
2803
2804 if (rc != 0) {
2805 CERROR("Can't get interface %s info: %d\n",
2806 ni->ni_interfaces[i], rc);
2807 goto fail_1;
2808 }
2809
2810 if (!up) {
2811 CERROR("Interface %s is down\n",
2812 ni->ni_interfaces[i]);
2813 goto fail_1;
2814 }
2815
2816 strncpy(&net->ksnn_interfaces[i].ksni_name[0],
2817 ni->ni_interfaces[i], IFNAMSIZ);
2818 }
2819 net->ksnn_ninterfaces = i;
2820 }
2821
2822 /* call it before add it to ksocknal_data.ksnd_nets */
2823 rc = ksocknal_net_start_threads(net, ni->ni_cpts, ni->ni_ncpts);
2824 if (rc != 0)
2825 goto fail_1;
2826
2827 ni->ni_nid = LNET_MKNID(LNET_NIDNET(ni->ni_nid),
2828 net->ksnn_interfaces[0].ksni_ipaddr);
2829 list_add(&net->ksnn_list, &ksocknal_data.ksnd_nets);
2830
2831 ksocknal_data.ksnd_nnets++;
2832
2833 return 0;
2834
2835 fail_1:
2836 LIBCFS_FREE(net, sizeof(*net));
2837 fail_0:
2838 if (ksocknal_data.ksnd_nnets == 0)
2839 ksocknal_base_shutdown();
2840
2841 return -ENETDOWN;
2842 }
2843
2844
2845 static void __exit
2846 ksocknal_module_fini (void)
2847 {
2848 lnet_unregister_lnd(&the_ksocklnd);
2849 }
2850
2851 static int __init
2852 ksocknal_module_init (void)
2853 {
2854 int rc;
2855
2856 /* check ksnr_connected/connecting field large enough */
2857 CLASSERT (SOCKLND_CONN_NTYPES <= 4);
2858 CLASSERT (SOCKLND_CONN_ACK == SOCKLND_CONN_BULK_IN);
2859
2860 /* initialize the_ksocklnd */
2861 the_ksocklnd.lnd_type = SOCKLND;
2862 the_ksocklnd.lnd_startup = ksocknal_startup;
2863 the_ksocklnd.lnd_shutdown = ksocknal_shutdown;
2864 the_ksocklnd.lnd_ctl = ksocknal_ctl;
2865 the_ksocklnd.lnd_send = ksocknal_send;
2866 the_ksocklnd.lnd_recv = ksocknal_recv;
2867 the_ksocklnd.lnd_notify = ksocknal_notify;
2868 the_ksocklnd.lnd_query = ksocknal_query;
2869 the_ksocklnd.lnd_accept = ksocknal_accept;
2870
2871 rc = ksocknal_tunables_init();
2872 if (rc != 0)
2873 return rc;
2874
2875 lnet_register_lnd(&the_ksocklnd);
2876
2877 return 0;
2878 }
2879
2880 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
2881 MODULE_DESCRIPTION("Kernel TCP Socket LND v3.0.0");
2882 MODULE_LICENSE("GPL");
2883 MODULE_VERSION("3.0.0");
2884
2885 module_init(ksocknal_module_init);
2886 module_exit(ksocknal_module_fini);
ubuntu-zesty-kernel mirror