1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lnet/klnds/socklnd/socklnd.c
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>
46 lnd_t the_ksocklnd = {
48 .lnd_startup = ksocknal_startup,
49 .lnd_shutdown = ksocknal_shutdown,
50 .lnd_ctl = ksocknal_ctl,
51 .lnd_send = ksocknal_send,
52 .lnd_recv = ksocknal_recv,
53 .lnd_notify = ksocknal_notify,
54 .lnd_accept = ksocknal_accept,
57 ksock_nal_data_t ksocknal_data;
60 ksocknal_ip2iface(lnet_ni_t *ni, __u32 ip)
62 ksock_net_t *net = ni->ni_data;
64 ksock_interface_t *iface;
66 for (i = 0; i < net->ksnn_ninterfaces; i++) {
67 LASSERT(i < LNET_MAX_INTERFACES);
68 iface = &net->ksnn_interfaces[i];
70 if (iface->ksni_ipaddr == ip)
78 ksocknal_create_route (__u32 ipaddr, int port)
82 LIBCFS_ALLOC (route, sizeof (*route));
86 atomic_set (&route->ksnr_refcount, 1);
87 route->ksnr_peer = NULL;
88 route->ksnr_retry_interval = 0; /* OK to connect at any time */
89 route->ksnr_ipaddr = ipaddr;
90 route->ksnr_port = port;
91 route->ksnr_scheduled = 0;
92 route->ksnr_connecting = 0;
93 route->ksnr_connected = 0;
94 route->ksnr_deleted = 0;
95 route->ksnr_conn_count = 0;
96 route->ksnr_share_count = 0;
102 ksocknal_destroy_route (ksock_route_t *route)
104 LASSERT (atomic_read(&route->ksnr_refcount) == 0);
106 if (route->ksnr_peer != NULL)
107 ksocknal_peer_decref(route->ksnr_peer);
109 LIBCFS_FREE (route, sizeof (*route));
113 ksocknal_create_peer (ksock_peer_t **peerp, lnet_ni_t *ni, lnet_process_id_t id)
115 ksock_net_t *net = ni->ni_data;
118 LASSERT (id.nid != LNET_NID_ANY);
119 LASSERT (id.pid != LNET_PID_ANY);
120 LASSERT (!in_interrupt());
122 LIBCFS_ALLOC (peer, sizeof (*peer));
126 memset (peer, 0, sizeof (*peer)); /* NULL pointers/clear flags etc */
130 atomic_set (&peer->ksnp_refcount, 1); /* 1 ref for caller */
131 peer->ksnp_closing = 0;
132 peer->ksnp_accepting = 0;
133 peer->ksnp_zc_next_cookie = 1;
134 peer->ksnp_proto = NULL;
135 CFS_INIT_LIST_HEAD (&peer->ksnp_conns);
136 CFS_INIT_LIST_HEAD (&peer->ksnp_routes);
137 CFS_INIT_LIST_HEAD (&peer->ksnp_tx_queue);
138 CFS_INIT_LIST_HEAD (&peer->ksnp_zc_req_list);
139 spin_lock_init(&peer->ksnp_lock);
141 spin_lock_bh (&net->ksnn_lock);
143 if (net->ksnn_shutdown) {
144 spin_unlock_bh (&net->ksnn_lock);
146 LIBCFS_FREE(peer, sizeof(*peer));
147 CERROR("Can't create peer: network shutdown\n");
153 spin_unlock_bh (&net->ksnn_lock);
160 ksocknal_destroy_peer (ksock_peer_t *peer)
162 ksock_net_t *net = peer->ksnp_ni->ni_data;
164 CDEBUG (D_NET, "peer %s %p deleted\n",
165 libcfs_id2str(peer->ksnp_id), peer);
167 LASSERT (atomic_read (&peer->ksnp_refcount) == 0);
168 LASSERT (peer->ksnp_accepting == 0);
169 LASSERT (list_empty (&peer->ksnp_conns));
170 LASSERT (list_empty (&peer->ksnp_routes));
171 LASSERT (list_empty (&peer->ksnp_tx_queue));
172 LASSERT (list_empty (&peer->ksnp_zc_req_list));
174 LIBCFS_FREE (peer, sizeof (*peer));
176 /* NB a peer's connections and routes keep a reference on their peer
177 * until they are destroyed, so we can be assured that _all_ state to
178 * do with this peer has been cleaned up when its refcount drops to
180 spin_lock_bh (&net->ksnn_lock);
182 spin_unlock_bh (&net->ksnn_lock);
186 ksocknal_find_peer_locked (lnet_ni_t *ni, lnet_process_id_t id)
188 struct list_head *peer_list = ksocknal_nid2peerlist(id.nid);
189 struct list_head *tmp;
192 list_for_each (tmp, peer_list) {
194 peer = list_entry (tmp, ksock_peer_t, ksnp_list);
196 LASSERT (!peer->ksnp_closing);
198 if (peer->ksnp_ni != ni)
201 if (peer->ksnp_id.nid != id.nid ||
202 peer->ksnp_id.pid != id.pid)
205 CDEBUG(D_NET, "got peer [%p] -> %s (%d)\n",
206 peer, libcfs_id2str(id),
207 atomic_read(&peer->ksnp_refcount));
214 ksocknal_find_peer (lnet_ni_t *ni, lnet_process_id_t id)
218 read_lock (&ksocknal_data.ksnd_global_lock);
219 peer = ksocknal_find_peer_locked (ni, id);
220 if (peer != NULL) /* +1 ref for caller? */
221 ksocknal_peer_addref(peer);
222 read_unlock (&ksocknal_data.ksnd_global_lock);
228 ksocknal_unlink_peer_locked (ksock_peer_t *peer)
232 ksock_interface_t *iface;
234 for (i = 0; i < peer->ksnp_n_passive_ips; i++) {
235 LASSERT (i < LNET_MAX_INTERFACES);
236 ip = peer->ksnp_passive_ips[i];
238 iface = ksocknal_ip2iface(peer->ksnp_ni, ip);
239 /* All IPs in peer->ksnp_passive_ips[] come from the
240 * interface list, therefore the call must succeed. */
241 LASSERT (iface != NULL);
243 CDEBUG(D_NET, "peer=%p iface=%p ksni_nroutes=%d\n",
244 peer, iface, iface->ksni_nroutes);
245 iface->ksni_npeers--;
248 LASSERT (list_empty(&peer->ksnp_conns));
249 LASSERT (list_empty(&peer->ksnp_routes));
250 LASSERT (!peer->ksnp_closing);
251 peer->ksnp_closing = 1;
252 list_del (&peer->ksnp_list);
253 /* lose peerlist's ref */
254 ksocknal_peer_decref(peer);
258 ksocknal_get_peer_info (lnet_ni_t *ni, int index,
259 lnet_process_id_t *id, __u32 *myip, __u32 *peer_ip, int *port,
260 int *conn_count, int *share_count)
263 struct list_head *ptmp;
264 ksock_route_t *route;
265 struct list_head *rtmp;
270 read_lock (&ksocknal_data.ksnd_global_lock);
272 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
274 list_for_each (ptmp, &ksocknal_data.ksnd_peers[i]) {
275 peer = list_entry (ptmp, ksock_peer_t, ksnp_list);
277 if (peer->ksnp_ni != ni)
280 if (peer->ksnp_n_passive_ips == 0 &&
281 list_empty(&peer->ksnp_routes)) {
295 for (j = 0; j < peer->ksnp_n_passive_ips; j++) {
300 *myip = peer->ksnp_passive_ips[j];
309 list_for_each (rtmp, &peer->ksnp_routes) {
313 route = list_entry(rtmp, ksock_route_t,
317 *myip = route->ksnr_myipaddr;
318 *peer_ip = route->ksnr_ipaddr;
319 *port = route->ksnr_port;
320 *conn_count = route->ksnr_conn_count;
321 *share_count = route->ksnr_share_count;
328 read_unlock (&ksocknal_data.ksnd_global_lock);
333 ksocknal_associate_route_conn_locked(ksock_route_t *route, ksock_conn_t *conn)
335 ksock_peer_t *peer = route->ksnr_peer;
336 int type = conn->ksnc_type;
337 ksock_interface_t *iface;
339 conn->ksnc_route = route;
340 ksocknal_route_addref(route);
342 if (route->ksnr_myipaddr != conn->ksnc_myipaddr) {
343 if (route->ksnr_myipaddr == 0) {
344 /* route wasn't bound locally yet (the initial route) */
345 CDEBUG(D_NET, "Binding %s %u.%u.%u.%u to %u.%u.%u.%u\n",
346 libcfs_id2str(peer->ksnp_id),
347 HIPQUAD(route->ksnr_ipaddr),
348 HIPQUAD(conn->ksnc_myipaddr));
350 CDEBUG(D_NET, "Rebinding %s %u.%u.%u.%u from "
351 "%u.%u.%u.%u to %u.%u.%u.%u\n",
352 libcfs_id2str(peer->ksnp_id),
353 HIPQUAD(route->ksnr_ipaddr),
354 HIPQUAD(route->ksnr_myipaddr),
355 HIPQUAD(conn->ksnc_myipaddr));
357 iface = ksocknal_ip2iface(route->ksnr_peer->ksnp_ni,
358 route->ksnr_myipaddr);
360 iface->ksni_nroutes--;
362 route->ksnr_myipaddr = conn->ksnc_myipaddr;
363 iface = ksocknal_ip2iface(route->ksnr_peer->ksnp_ni,
364 route->ksnr_myipaddr);
366 iface->ksni_nroutes++;
369 route->ksnr_connected |= (1<<type);
370 route->ksnr_conn_count++;
372 /* Successful connection => further attempts can
373 * proceed immediately */
374 route->ksnr_retry_interval = 0;
378 ksocknal_add_route_locked (ksock_peer_t *peer, ksock_route_t *route)
380 struct list_head *tmp;
382 ksock_route_t *route2;
384 LASSERT (!peer->ksnp_closing);
385 LASSERT (route->ksnr_peer == NULL);
386 LASSERT (!route->ksnr_scheduled);
387 LASSERT (!route->ksnr_connecting);
388 LASSERT (route->ksnr_connected == 0);
390 /* LASSERT(unique) */
391 list_for_each(tmp, &peer->ksnp_routes) {
392 route2 = list_entry(tmp, ksock_route_t, ksnr_list);
394 if (route2->ksnr_ipaddr == route->ksnr_ipaddr) {
395 CERROR ("Duplicate route %s %u.%u.%u.%u\n",
396 libcfs_id2str(peer->ksnp_id),
397 HIPQUAD(route->ksnr_ipaddr));
402 route->ksnr_peer = peer;
403 ksocknal_peer_addref(peer);
404 /* peer's routelist takes over my ref on 'route' */
405 list_add_tail(&route->ksnr_list, &peer->ksnp_routes);
407 list_for_each(tmp, &peer->ksnp_conns) {
408 conn = list_entry(tmp, ksock_conn_t, ksnc_list);
410 if (conn->ksnc_ipaddr != route->ksnr_ipaddr)
413 ksocknal_associate_route_conn_locked(route, conn);
414 /* keep going (typed routes) */
419 ksocknal_del_route_locked (ksock_route_t *route)
421 ksock_peer_t *peer = route->ksnr_peer;
422 ksock_interface_t *iface;
424 struct list_head *ctmp;
425 struct list_head *cnxt;
427 LASSERT (!route->ksnr_deleted);
429 /* Close associated conns */
430 list_for_each_safe (ctmp, cnxt, &peer->ksnp_conns) {
431 conn = list_entry(ctmp, ksock_conn_t, ksnc_list);
433 if (conn->ksnc_route != route)
436 ksocknal_close_conn_locked (conn, 0);
439 if (route->ksnr_myipaddr != 0) {
440 iface = ksocknal_ip2iface(route->ksnr_peer->ksnp_ni,
441 route->ksnr_myipaddr);
443 iface->ksni_nroutes--;
446 route->ksnr_deleted = 1;
447 list_del (&route->ksnr_list);
448 ksocknal_route_decref(route); /* drop peer's ref */
450 if (list_empty (&peer->ksnp_routes) &&
451 list_empty (&peer->ksnp_conns)) {
452 /* I've just removed the last route to a peer with no active
454 ksocknal_unlink_peer_locked (peer);
459 ksocknal_add_peer (lnet_ni_t *ni, lnet_process_id_t id, __u32 ipaddr, int port)
461 struct list_head *tmp;
464 ksock_route_t *route;
465 ksock_route_t *route2;
468 if (id.nid == LNET_NID_ANY ||
469 id.pid == LNET_PID_ANY)
472 /* Have a brand new peer ready... */
473 rc = ksocknal_create_peer(&peer, ni, id);
477 route = ksocknal_create_route (ipaddr, port);
479 ksocknal_peer_decref(peer);
483 write_lock_bh (&ksocknal_data.ksnd_global_lock);
485 /* always called with a ref on ni, so shutdown can't have started */
486 LASSERT (((ksock_net_t *) ni->ni_data)->ksnn_shutdown == 0);
488 peer2 = ksocknal_find_peer_locked (ni, id);
490 ksocknal_peer_decref(peer);
493 /* peer table takes my ref on peer */
494 list_add_tail (&peer->ksnp_list,
495 ksocknal_nid2peerlist (id.nid));
499 list_for_each (tmp, &peer->ksnp_routes) {
500 route2 = list_entry(tmp, ksock_route_t, ksnr_list);
502 if (route2->ksnr_ipaddr == ipaddr)
507 if (route2 == NULL) {
508 ksocknal_add_route_locked(peer, route);
509 route->ksnr_share_count++;
511 ksocknal_route_decref(route);
512 route2->ksnr_share_count++;
515 write_unlock_bh (&ksocknal_data.ksnd_global_lock);
521 ksocknal_del_peer_locked (ksock_peer_t *peer, __u32 ip)
524 ksock_route_t *route;
525 struct list_head *tmp;
526 struct list_head *nxt;
529 LASSERT (!peer->ksnp_closing);
531 /* Extra ref prevents peer disappearing until I'm done with it */
532 ksocknal_peer_addref(peer);
534 list_for_each_safe (tmp, nxt, &peer->ksnp_routes) {
535 route = list_entry(tmp, ksock_route_t, ksnr_list);
538 if (!(ip == 0 || route->ksnr_ipaddr == ip))
541 route->ksnr_share_count = 0;
542 /* This deletes associated conns too */
543 ksocknal_del_route_locked (route);
547 list_for_each_safe (tmp, nxt, &peer->ksnp_routes) {
548 route = list_entry(tmp, ksock_route_t, ksnr_list);
549 nshared += route->ksnr_share_count;
553 /* remove everything else if there are no explicit entries
556 list_for_each_safe (tmp, nxt, &peer->ksnp_routes) {
557 route = list_entry(tmp, ksock_route_t, ksnr_list);
559 /* we should only be removing auto-entries */
560 LASSERT(route->ksnr_share_count == 0);
561 ksocknal_del_route_locked (route);
564 list_for_each_safe (tmp, nxt, &peer->ksnp_conns) {
565 conn = list_entry(tmp, ksock_conn_t, ksnc_list);
567 ksocknal_close_conn_locked(conn, 0);
571 ksocknal_peer_decref(peer);
572 /* NB peer unlinks itself when last conn/route is removed */
576 ksocknal_del_peer (lnet_ni_t *ni, lnet_process_id_t id, __u32 ip)
578 CFS_LIST_HEAD (zombies);
579 struct list_head *ptmp;
580 struct list_head *pnxt;
587 write_lock_bh (&ksocknal_data.ksnd_global_lock);
589 if (id.nid != LNET_NID_ANY)
590 lo = hi = ksocknal_nid2peerlist(id.nid) - ksocknal_data.ksnd_peers;
593 hi = ksocknal_data.ksnd_peer_hash_size - 1;
596 for (i = lo; i <= hi; i++) {
597 list_for_each_safe (ptmp, pnxt, &ksocknal_data.ksnd_peers[i]) {
598 peer = list_entry (ptmp, ksock_peer_t, ksnp_list);
600 if (peer->ksnp_ni != ni)
603 if (!((id.nid == LNET_NID_ANY || peer->ksnp_id.nid == id.nid) &&
604 (id.pid == LNET_PID_ANY || peer->ksnp_id.pid == id.pid)))
607 ksocknal_peer_addref(peer); /* a ref for me... */
609 ksocknal_del_peer_locked (peer, ip);
611 if (peer->ksnp_closing && !list_empty(&peer->ksnp_tx_queue)) {
612 LASSERT (list_empty(&peer->ksnp_conns));
613 LASSERT (list_empty(&peer->ksnp_routes));
615 list_splice_init(&peer->ksnp_tx_queue, &zombies);
618 ksocknal_peer_decref(peer); /* ...till here */
620 rc = 0; /* matched! */
624 write_unlock_bh (&ksocknal_data.ksnd_global_lock);
626 ksocknal_txlist_done(ni, &zombies, 1);
632 ksocknal_get_conn_by_idx (lnet_ni_t *ni, int index)
635 struct list_head *ptmp;
637 struct list_head *ctmp;
640 read_lock (&ksocknal_data.ksnd_global_lock);
642 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
643 list_for_each (ptmp, &ksocknal_data.ksnd_peers[i]) {
644 peer = list_entry (ptmp, ksock_peer_t, ksnp_list);
646 LASSERT (!peer->ksnp_closing);
648 if (peer->ksnp_ni != ni)
651 list_for_each (ctmp, &peer->ksnp_conns) {
655 conn = list_entry (ctmp, ksock_conn_t, ksnc_list);
656 ksocknal_conn_addref(conn);
657 read_unlock (&ksocknal_data.ksnd_global_lock);
663 read_unlock (&ksocknal_data.ksnd_global_lock);
668 ksocknal_choose_scheduler_locked (unsigned int irq)
670 ksock_sched_t *sched;
671 ksock_irqinfo_t *info;
674 LASSERT (irq < NR_IRQS);
675 info = &ksocknal_data.ksnd_irqinfo[irq];
677 if (irq != 0 && /* hardware NIC */
678 info->ksni_valid) { /* already set up */
679 return (&ksocknal_data.ksnd_schedulers[info->ksni_sched]);
682 /* software NIC (irq == 0) || not associated with a scheduler yet.
683 * Choose the CPU with the fewest connections... */
684 sched = &ksocknal_data.ksnd_schedulers[0];
685 for (i = 1; i < ksocknal_data.ksnd_nschedulers; i++)
686 if (sched->kss_nconns >
687 ksocknal_data.ksnd_schedulers[i].kss_nconns)
688 sched = &ksocknal_data.ksnd_schedulers[i];
690 if (irq != 0) { /* Hardware NIC */
691 info->ksni_valid = 1;
692 info->ksni_sched = sched - ksocknal_data.ksnd_schedulers;
695 LASSERT (info->ksni_sched == sched - ksocknal_data.ksnd_schedulers);
702 ksocknal_local_ipvec (lnet_ni_t *ni, __u32 *ipaddrs)
704 ksock_net_t *net = ni->ni_data;
708 read_lock (&ksocknal_data.ksnd_global_lock);
710 nip = net->ksnn_ninterfaces;
711 LASSERT (nip <= LNET_MAX_INTERFACES);
713 /* Only offer interfaces for additional connections if I have
716 read_unlock (&ksocknal_data.ksnd_global_lock);
720 for (i = 0; i < nip; i++) {
721 ipaddrs[i] = net->ksnn_interfaces[i].ksni_ipaddr;
722 LASSERT (ipaddrs[i] != 0);
725 read_unlock (&ksocknal_data.ksnd_global_lock);
730 ksocknal_match_peerip (ksock_interface_t *iface, __u32 *ips, int nips)
732 int best_netmatch = 0;
739 for (i = 0; i < nips; i++) {
743 this_xor = (ips[i] ^ iface->ksni_ipaddr);
744 this_netmatch = ((this_xor & iface->ksni_netmask) == 0) ? 1 : 0;
747 best_netmatch < this_netmatch ||
748 (best_netmatch == this_netmatch &&
749 best_xor > this_xor)))
753 best_netmatch = this_netmatch;
762 ksocknal_select_ips(ksock_peer_t *peer, __u32 *peerips, int n_peerips)
764 rwlock_t *global_lock = &ksocknal_data.ksnd_global_lock;
765 ksock_net_t *net = peer->ksnp_ni->ni_data;
766 ksock_interface_t *iface;
767 ksock_interface_t *best_iface;
778 /* CAVEAT EMPTOR: We do all our interface matching with an
779 * exclusive hold of global lock at IRQ priority. We're only
780 * expecting to be dealing with small numbers of interfaces, so the
781 * O(n**3)-ness shouldn't matter */
783 /* Also note that I'm not going to return more than n_peerips
784 * interfaces, even if I have more myself */
786 write_lock_bh (global_lock);
788 LASSERT (n_peerips <= LNET_MAX_INTERFACES);
789 LASSERT (net->ksnn_ninterfaces <= LNET_MAX_INTERFACES);
791 /* Only match interfaces for additional connections
792 * if I have > 1 interface */
793 n_ips = (net->ksnn_ninterfaces < 2) ? 0 :
794 MIN(n_peerips, net->ksnn_ninterfaces);
796 for (i = 0; peer->ksnp_n_passive_ips < n_ips; i++) {
797 /* ^ yes really... */
799 /* If we have any new interfaces, first tick off all the
800 * peer IPs that match old interfaces, then choose new
801 * interfaces to match the remaining peer IPS.
802 * We don't forget interfaces we've stopped using; we might
803 * start using them again... */
805 if (i < peer->ksnp_n_passive_ips) {
807 ip = peer->ksnp_passive_ips[i];
808 best_iface = ksocknal_ip2iface(peer->ksnp_ni, ip);
810 /* peer passive ips are kept up to date */
811 LASSERT(best_iface != NULL);
813 /* choose a new interface */
814 LASSERT (i == peer->ksnp_n_passive_ips);
820 for (j = 0; j < net->ksnn_ninterfaces; j++) {
821 iface = &net->ksnn_interfaces[j];
822 ip = iface->ksni_ipaddr;
824 for (k = 0; k < peer->ksnp_n_passive_ips; k++)
825 if (peer->ksnp_passive_ips[k] == ip)
828 if (k < peer->ksnp_n_passive_ips) /* using it already */
831 k = ksocknal_match_peerip(iface, peerips, n_peerips);
832 xor = (ip ^ peerips[k]);
833 this_netmatch = ((xor & iface->ksni_netmask) == 0) ? 1 : 0;
835 if (!(best_iface == NULL ||
836 best_netmatch < this_netmatch ||
837 (best_netmatch == this_netmatch &&
838 best_npeers > iface->ksni_npeers)))
842 best_netmatch = this_netmatch;
843 best_npeers = iface->ksni_npeers;
846 best_iface->ksni_npeers++;
847 ip = best_iface->ksni_ipaddr;
848 peer->ksnp_passive_ips[i] = ip;
849 peer->ksnp_n_passive_ips = i+1;
852 LASSERT (best_iface != NULL);
854 /* mark the best matching peer IP used */
855 j = ksocknal_match_peerip(best_iface, peerips, n_peerips);
859 /* Overwrite input peer IP addresses */
860 memcpy(peerips, peer->ksnp_passive_ips, n_ips * sizeof(*peerips));
862 write_unlock_bh (global_lock);
868 ksocknal_create_routes(ksock_peer_t *peer, int port,
869 __u32 *peer_ipaddrs, int npeer_ipaddrs)
871 ksock_route_t *newroute = NULL;
872 rwlock_t *global_lock = &ksocknal_data.ksnd_global_lock;
873 lnet_ni_t *ni = peer->ksnp_ni;
874 ksock_net_t *net = ni->ni_data;
875 struct list_head *rtmp;
876 ksock_route_t *route;
877 ksock_interface_t *iface;
878 ksock_interface_t *best_iface;
885 /* CAVEAT EMPTOR: We do all our interface matching with an
886 * exclusive hold of global lock at IRQ priority. We're only
887 * expecting to be dealing with small numbers of interfaces, so the
888 * O(n**3)-ness here shouldn't matter */
890 write_lock_bh (global_lock);
892 if (net->ksnn_ninterfaces < 2) {
893 /* Only create additional connections
894 * if I have > 1 interface */
895 write_unlock_bh (global_lock);
899 LASSERT (npeer_ipaddrs <= LNET_MAX_INTERFACES);
901 for (i = 0; i < npeer_ipaddrs; i++) {
902 if (newroute != NULL) {
903 newroute->ksnr_ipaddr = peer_ipaddrs[i];
905 write_unlock_bh (global_lock);
907 newroute = ksocknal_create_route(peer_ipaddrs[i], port);
908 if (newroute == NULL)
911 write_lock_bh (global_lock);
914 if (peer->ksnp_closing) {
915 /* peer got closed under me */
919 /* Already got a route? */
921 list_for_each(rtmp, &peer->ksnp_routes) {
922 route = list_entry(rtmp, ksock_route_t, ksnr_list);
924 if (route->ksnr_ipaddr == newroute->ksnr_ipaddr)
936 LASSERT (net->ksnn_ninterfaces <= LNET_MAX_INTERFACES);
938 /* Select interface to connect from */
939 for (j = 0; j < net->ksnn_ninterfaces; j++) {
940 iface = &net->ksnn_interfaces[j];
942 /* Using this interface already? */
943 list_for_each(rtmp, &peer->ksnp_routes) {
944 route = list_entry(rtmp, ksock_route_t, ksnr_list);
946 if (route->ksnr_myipaddr == iface->ksni_ipaddr)
954 this_netmatch = (((iface->ksni_ipaddr ^
955 newroute->ksnr_ipaddr) &
956 iface->ksni_netmask) == 0) ? 1 : 0;
958 if (!(best_iface == NULL ||
959 best_netmatch < this_netmatch ||
960 (best_netmatch == this_netmatch &&
961 best_nroutes > iface->ksni_nroutes)))
965 best_netmatch = this_netmatch;
966 best_nroutes = iface->ksni_nroutes;
969 if (best_iface == NULL)
972 newroute->ksnr_myipaddr = best_iface->ksni_ipaddr;
973 best_iface->ksni_nroutes++;
975 ksocknal_add_route_locked(peer, newroute);
979 write_unlock_bh (global_lock);
980 if (newroute != NULL)
981 ksocknal_route_decref(newroute);
985 ksocknal_accept (lnet_ni_t *ni, cfs_socket_t *sock)
992 rc = libcfs_sock_getaddr(sock, 1, &peer_ip, &peer_port);
993 LASSERT (rc == 0); /* we succeeded before */
995 LIBCFS_ALLOC(cr, sizeof(*cr));
997 LCONSOLE_ERROR_MSG(0x12f, "Dropping connection request from "
998 "%u.%u.%u.%u: memory exhausted\n",
1005 cr->ksncr_sock = sock;
1007 spin_lock_bh (&ksocknal_data.ksnd_connd_lock);
1009 list_add_tail(&cr->ksncr_list, &ksocknal_data.ksnd_connd_connreqs);
1010 cfs_waitq_signal(&ksocknal_data.ksnd_connd_waitq);
1012 spin_unlock_bh (&ksocknal_data.ksnd_connd_lock);
1017 ksocknal_connecting (ksock_peer_t *peer, __u32 ipaddr)
1019 ksock_route_t *route;
1021 list_for_each_entry (route, &peer->ksnp_routes, ksnr_list) {
1023 if (route->ksnr_ipaddr == ipaddr)
1024 return route->ksnr_connecting;
1030 ksocknal_create_conn (lnet_ni_t *ni, ksock_route_t *route,
1031 cfs_socket_t *sock, int type)
1033 rwlock_t *global_lock = &ksocknal_data.ksnd_global_lock;
1034 CFS_LIST_HEAD (zombies);
1035 lnet_process_id_t peerid;
1036 struct list_head *tmp;
1039 ksock_conn_t *conn2;
1040 ksock_peer_t *peer = NULL;
1041 ksock_peer_t *peer2;
1042 ksock_sched_t *sched;
1043 ksock_hello_msg_t *hello;
1050 active = (route != NULL);
1052 LASSERT (active == (type != SOCKLND_CONN_NONE));
1054 irq = ksocknal_lib_sock_irq (sock);
1056 LIBCFS_ALLOC(conn, sizeof(*conn));
1062 memset (conn, 0, sizeof (*conn));
1063 conn->ksnc_peer = NULL;
1064 conn->ksnc_route = NULL;
1065 conn->ksnc_sock = sock;
1066 /* 2 ref, 1 for conn, another extra ref prevents socket
1067 * being closed before establishment of connection */
1068 atomic_set (&conn->ksnc_sock_refcount, 2);
1069 conn->ksnc_type = type;
1070 ksocknal_lib_save_callback(sock, conn);
1071 atomic_set (&conn->ksnc_conn_refcount, 1); /* 1 ref for me */
1073 conn->ksnc_zc_capable = ksocknal_lib_zc_capable(sock);
1074 conn->ksnc_rx_ready = 0;
1075 conn->ksnc_rx_scheduled = 0;
1077 CFS_INIT_LIST_HEAD (&conn->ksnc_tx_queue);
1078 conn->ksnc_tx_ready = 0;
1079 conn->ksnc_tx_scheduled = 0;
1080 conn->ksnc_tx_mono = NULL;
1081 atomic_set (&conn->ksnc_tx_nob, 0);
1083 LIBCFS_ALLOC(hello, offsetof(ksock_hello_msg_t,
1084 kshm_ips[LNET_MAX_INTERFACES]));
1085 if (hello == NULL) {
1090 /* stash conn's local and remote addrs */
1091 rc = ksocknal_lib_get_conn_addrs (conn);
1095 /* Find out/confirm peer's NID and connection type and get the
1096 * vector of interfaces she's willing to let me connect to.
1097 * Passive connections use the listener timeout since the peer sends
1101 peer = route->ksnr_peer;
1102 LASSERT(ni == peer->ksnp_ni);
1104 /* Active connection sends HELLO eagerly */
1105 hello->kshm_nips = ksocknal_local_ipvec(ni, hello->kshm_ips);
1106 peerid = peer->ksnp_id;
1108 write_lock_bh(global_lock);
1109 conn->ksnc_proto = peer->ksnp_proto;
1110 write_unlock_bh(global_lock);
1112 if (conn->ksnc_proto == NULL) {
1113 conn->ksnc_proto = &ksocknal_protocol_v2x;
1114 #if SOCKNAL_VERSION_DEBUG
1115 if (*ksocknal_tunables.ksnd_protocol != 2)
1116 conn->ksnc_proto = &ksocknal_protocol_v1x;
1120 rc = ksocknal_send_hello (ni, conn, peerid.nid, hello);
1124 peerid.nid = LNET_NID_ANY;
1125 peerid.pid = LNET_PID_ANY;
1127 /* Passive, get protocol from peer */
1128 conn->ksnc_proto = NULL;
1131 rc = ksocknal_recv_hello (ni, conn, hello, &peerid, &incarnation);
1135 LASSERT (rc == 0 || active);
1136 LASSERT (conn->ksnc_proto != NULL);
1137 LASSERT (peerid.nid != LNET_NID_ANY);
1140 ksocknal_peer_addref(peer);
1141 write_lock_bh (global_lock);
1143 rc = ksocknal_create_peer(&peer, ni, peerid);
1147 write_lock_bh (global_lock);
1149 /* called with a ref on ni, so shutdown can't have started */
1150 LASSERT (((ksock_net_t *) ni->ni_data)->ksnn_shutdown == 0);
1152 peer2 = ksocknal_find_peer_locked(ni, peerid);
1153 if (peer2 == NULL) {
1154 /* NB this puts an "empty" peer in the peer
1155 * table (which takes my ref) */
1156 list_add_tail(&peer->ksnp_list,
1157 ksocknal_nid2peerlist(peerid.nid));
1159 ksocknal_peer_decref(peer);
1164 ksocknal_peer_addref(peer);
1165 peer->ksnp_accepting++;
1167 /* Am I already connecting to this guy? Resolve in
1168 * favour of higher NID... */
1169 if (peerid.nid < ni->ni_nid &&
1170 ksocknal_connecting(peer, conn->ksnc_ipaddr)) {
1172 warn = "connection race resolution";
1177 if (peer->ksnp_closing ||
1178 (active && route->ksnr_deleted)) {
1179 /* peer/route got closed under me */
1181 warn = "peer/route removed";
1185 if (peer->ksnp_proto == NULL) {
1186 /* Never connected before.
1187 * NB recv_hello may have returned EPROTO to signal my peer
1188 * wants a different protocol than the one I asked for.
1190 LASSERT (list_empty(&peer->ksnp_conns));
1192 peer->ksnp_proto = conn->ksnc_proto;
1193 peer->ksnp_incarnation = incarnation;
1196 if (peer->ksnp_proto != conn->ksnc_proto ||
1197 peer->ksnp_incarnation != incarnation) {
1198 /* Peer rebooted or I've got the wrong protocol version */
1199 ksocknal_close_peer_conns_locked(peer, 0, 0);
1201 peer->ksnp_proto = NULL;
1203 warn = peer->ksnp_incarnation != incarnation ?
1205 "wrong proto version";
1215 warn = "lost conn race";
1218 warn = "retry with different protocol version";
1222 /* Refuse to duplicate an existing connection, unless this is a
1223 * loopback connection */
1224 if (conn->ksnc_ipaddr != conn->ksnc_myipaddr) {
1225 list_for_each(tmp, &peer->ksnp_conns) {
1226 conn2 = list_entry(tmp, ksock_conn_t, ksnc_list);
1228 if (conn2->ksnc_ipaddr != conn->ksnc_ipaddr ||
1229 conn2->ksnc_myipaddr != conn->ksnc_myipaddr ||
1230 conn2->ksnc_type != conn->ksnc_type)
1233 /* Reply on a passive connection attempt so the peer
1234 * realises we're connected. */
1244 /* If the connection created by this route didn't bind to the IP
1245 * address the route connected to, the connection/route matching
1246 * code below probably isn't going to work. */
1248 route->ksnr_ipaddr != conn->ksnc_ipaddr) {
1249 CERROR("Route %s %u.%u.%u.%u connected to %u.%u.%u.%u\n",
1250 libcfs_id2str(peer->ksnp_id),
1251 HIPQUAD(route->ksnr_ipaddr),
1252 HIPQUAD(conn->ksnc_ipaddr));
1255 /* Search for a route corresponding to the new connection and
1256 * create an association. This allows incoming connections created
1257 * by routes in my peer to match my own route entries so I don't
1258 * continually create duplicate routes. */
1259 list_for_each (tmp, &peer->ksnp_routes) {
1260 route = list_entry(tmp, ksock_route_t, ksnr_list);
1262 if (route->ksnr_ipaddr != conn->ksnc_ipaddr)
1265 ksocknal_associate_route_conn_locked(route, conn);
1269 conn->ksnc_peer = peer; /* conn takes my ref on peer */
1270 peer->ksnp_last_alive = cfs_time_current();
1271 peer->ksnp_error = 0;
1273 sched = ksocknal_choose_scheduler_locked (irq);
1274 sched->kss_nconns++;
1275 conn->ksnc_scheduler = sched;
1277 /* Set the deadline for the outgoing HELLO to drain */
1278 conn->ksnc_tx_bufnob = SOCK_WMEM_QUEUED(sock);
1279 conn->ksnc_tx_deadline = cfs_time_shift(*ksocknal_tunables.ksnd_timeout);
1280 mb(); /* order with adding to peer's conn list */
1282 list_add (&conn->ksnc_list, &peer->ksnp_conns);
1283 ksocknal_conn_addref(conn);
1285 ksocknal_new_packet(conn, 0);
1287 /* Take all the packets blocking for a connection.
1288 * NB, it might be nicer to share these blocked packets among any
1289 * other connections that are becoming established. */
1290 while (!list_empty (&peer->ksnp_tx_queue)) {
1291 tx = list_entry (peer->ksnp_tx_queue.next,
1292 ksock_tx_t, tx_list);
1294 list_del (&tx->tx_list);
1295 ksocknal_queue_tx_locked (tx, conn);
1298 write_unlock_bh (global_lock);
1300 /* We've now got a new connection. Any errors from here on are just
1301 * like "normal" comms errors and we close the connection normally.
1302 * NB (a) we still have to send the reply HELLO for passive
1304 * (b) normal I/O on the conn is blocked until I setup and call the
1308 ksocknal_lib_bind_irq (irq);
1310 CDEBUG(D_NET, "New conn %s p %d.x %u.%u.%u.%u -> %u.%u.%u.%u/%d"
1311 " incarnation:"LPD64" sched[%d]/%d\n",
1312 libcfs_id2str(peerid), conn->ksnc_proto->pro_version,
1313 HIPQUAD(conn->ksnc_myipaddr), HIPQUAD(conn->ksnc_ipaddr),
1314 conn->ksnc_port, incarnation,
1315 (int)(conn->ksnc_scheduler - ksocknal_data.ksnd_schedulers), irq);
1318 /* additional routes after interface exchange? */
1319 ksocknal_create_routes(peer, conn->ksnc_port,
1320 hello->kshm_ips, hello->kshm_nips);
1322 hello->kshm_nips = ksocknal_select_ips(peer, hello->kshm_ips,
1324 rc = ksocknal_send_hello(ni, conn, peerid.nid, hello);
1327 LIBCFS_FREE(hello, offsetof(ksock_hello_msg_t,
1328 kshm_ips[LNET_MAX_INTERFACES]));
1330 /* setup the socket AFTER I've received hello (it disables
1331 * SO_LINGER). I might call back to the acceptor who may want
1332 * to send a protocol version response and then close the
1333 * socket; this ensures the socket only tears down after the
1334 * response has been sent. */
1336 rc = ksocknal_lib_setup_sock(sock);
1338 write_lock_bh(global_lock);
1340 /* NB my callbacks block while I hold ksnd_global_lock */
1341 ksocknal_lib_set_callback(sock, conn);
1344 peer->ksnp_accepting--;
1346 write_unlock_bh(global_lock);
1349 write_lock_bh(global_lock);
1350 ksocknal_close_conn_locked(conn, rc);
1351 write_unlock_bh(global_lock);
1352 } else if (ksocknal_connsock_addref(conn) == 0) {
1353 /* Allow I/O to proceed. */
1354 ksocknal_read_callback(conn);
1355 ksocknal_write_callback(conn);
1356 ksocknal_connsock_decref(conn);
1359 ksocknal_connsock_decref(conn);
1360 ksocknal_conn_decref(conn);
1364 if (!peer->ksnp_closing &&
1365 list_empty (&peer->ksnp_conns) &&
1366 list_empty (&peer->ksnp_routes)) {
1367 list_add(&zombies, &peer->ksnp_tx_queue);
1368 list_del_init(&peer->ksnp_tx_queue);
1369 ksocknal_unlink_peer_locked(peer);
1372 write_unlock_bh (global_lock);
1376 CERROR("Not creating conn %s type %d: %s\n",
1377 libcfs_id2str(peerid), conn->ksnc_type, warn);
1379 CDEBUG(D_NET, "Not creating conn %s type %d: %s\n",
1380 libcfs_id2str(peerid), conn->ksnc_type, warn);
1385 /* Request retry by replying with CONN_NONE
1386 * ksnc_proto has been set already */
1387 conn->ksnc_type = SOCKLND_CONN_NONE;
1388 hello->kshm_nips = 0;
1389 ksocknal_send_hello(ni, conn, peerid.nid, hello);
1392 write_lock_bh(global_lock);
1393 peer->ksnp_accepting--;
1394 write_unlock_bh(global_lock);
1397 ksocknal_txlist_done(ni, &zombies, 1);
1398 ksocknal_peer_decref(peer);
1402 LIBCFS_FREE(hello, offsetof(ksock_hello_msg_t,
1403 kshm_ips[LNET_MAX_INTERFACES]));
1405 LIBCFS_FREE (conn, sizeof(*conn));
1408 libcfs_sock_release(sock);
1413 ksocknal_close_conn_locked (ksock_conn_t *conn, int error)
1415 /* This just does the immmediate housekeeping, and queues the
1416 * connection for the reaper to terminate.
1417 * Caller holds ksnd_global_lock exclusively in irq context */
1418 ksock_peer_t *peer = conn->ksnc_peer;
1419 ksock_route_t *route;
1420 ksock_conn_t *conn2;
1421 struct list_head *tmp;
1423 LASSERT (peer->ksnp_error == 0);
1424 LASSERT (!conn->ksnc_closing);
1425 conn->ksnc_closing = 1;
1427 /* ksnd_deathrow_conns takes over peer's ref */
1428 list_del (&conn->ksnc_list);
1430 route = conn->ksnc_route;
1431 if (route != NULL) {
1432 /* dissociate conn from route... */
1433 LASSERT (!route->ksnr_deleted);
1434 LASSERT ((route->ksnr_connected & (1 << conn->ksnc_type)) != 0);
1437 list_for_each(tmp, &peer->ksnp_conns) {
1438 conn2 = list_entry(tmp, ksock_conn_t, ksnc_list);
1440 if (conn2->ksnc_route == route &&
1441 conn2->ksnc_type == conn->ksnc_type)
1447 route->ksnr_connected &= ~(1 << conn->ksnc_type);
1449 conn->ksnc_route = NULL;
1451 #if 0 /* irrelevent with only eager routes */
1452 list_del (&route->ksnr_list); /* make route least favourite */
1453 list_add_tail (&route->ksnr_list, &peer->ksnp_routes);
1455 ksocknal_route_decref(route); /* drop conn's ref on route */
1458 if (list_empty (&peer->ksnp_conns)) {
1459 /* No more connections to this peer */
1461 peer->ksnp_proto = NULL; /* renegotiate protocol version */
1462 peer->ksnp_error = error; /* stash last conn close reason */
1464 if (list_empty (&peer->ksnp_routes)) {
1465 /* I've just closed last conn belonging to a
1466 * peer with no routes to it */
1467 ksocknal_unlink_peer_locked (peer);
1471 spin_lock_bh (&ksocknal_data.ksnd_reaper_lock);
1473 list_add_tail (&conn->ksnc_list, &ksocknal_data.ksnd_deathrow_conns);
1474 cfs_waitq_signal (&ksocknal_data.ksnd_reaper_waitq);
1476 spin_unlock_bh (&ksocknal_data.ksnd_reaper_lock);
1480 ksocknal_peer_failed (ksock_peer_t *peer)
1482 time_t last_alive = 0;
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 existance. */
1489 read_lock (&ksocknal_data.ksnd_global_lock);
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) {
1496 last_alive = cfs_time_current_sec() -
1497 cfs_duration_sec(cfs_time_current() -
1498 peer->ksnp_last_alive);
1501 read_unlock (&ksocknal_data.ksnd_global_lock);
1504 lnet_notify (peer->ksnp_ni, peer->ksnp_id.nid, 0,
1509 ksocknal_finalize_zcreq(ksock_conn_t *conn)
1511 ksock_peer_t *peer = conn->ksnc_peer;
1514 CFS_LIST_HEAD (zlist);
1516 /* NB safe to finalize TXs because closing of socket will
1517 * abort all buffered data */
1518 LASSERT (conn->ksnc_sock == NULL);
1520 spin_lock(&peer->ksnp_lock);
1522 list_for_each_entry_safe(tx, tmp, &peer->ksnp_zc_req_list, tx_zc_list) {
1523 if (tx->tx_conn != conn)
1526 LASSERT (tx->tx_msg.ksm_zc_req_cookie != 0);
1528 tx->tx_msg.ksm_zc_req_cookie = 0;
1529 list_del(&tx->tx_zc_list);
1530 list_add(&tx->tx_zc_list, &zlist);
1533 spin_unlock(&peer->ksnp_lock);
1535 while (!list_empty(&zlist)) {
1536 tx = list_entry(zlist.next, ksock_tx_t, tx_zc_list);
1538 list_del(&tx->tx_zc_list);
1539 ksocknal_tx_decref(tx);
1544 ksocknal_terminate_conn (ksock_conn_t *conn)
1546 /* This gets called by the reaper (guaranteed thread context) to
1547 * disengage the socket from its callbacks and close it.
1548 * ksnc_refcount will eventually hit zero, and then the reaper will
1550 ksock_peer_t *peer = conn->ksnc_peer;
1551 ksock_sched_t *sched = conn->ksnc_scheduler;
1554 LASSERT(conn->ksnc_closing);
1556 /* wake up the scheduler to "send" all remaining packets to /dev/null */
1557 spin_lock_bh (&sched->kss_lock);
1559 /* a closing conn is always ready to tx */
1560 conn->ksnc_tx_ready = 1;
1562 if (!conn->ksnc_tx_scheduled &&
1563 !list_empty(&conn->ksnc_tx_queue)){
1564 list_add_tail (&conn->ksnc_tx_list,
1565 &sched->kss_tx_conns);
1566 conn->ksnc_tx_scheduled = 1;
1567 /* extra ref for scheduler */
1568 ksocknal_conn_addref(conn);
1570 cfs_waitq_signal (&sched->kss_waitq);
1573 spin_unlock_bh (&sched->kss_lock);
1575 /* serialise with callbacks */
1576 write_lock_bh (&ksocknal_data.ksnd_global_lock);
1578 ksocknal_lib_reset_callback(conn->ksnc_sock, conn);
1580 /* OK, so this conn may not be completely disengaged from its
1581 * scheduler yet, but it _has_ committed to terminate... */
1582 conn->ksnc_scheduler->kss_nconns--;
1584 if (peer->ksnp_error != 0) {
1585 /* peer's last conn closed in error */
1586 LASSERT (list_empty (&peer->ksnp_conns));
1588 peer->ksnp_error = 0; /* avoid multiple notifications */
1591 write_unlock_bh (&ksocknal_data.ksnd_global_lock);
1594 ksocknal_peer_failed(peer);
1596 /* The socket is closed on the final put; either here, or in
1597 * ksocknal_{send,recv}msg(). Since we set up the linger2 option
1598 * when the connection was established, this will close the socket
1599 * immediately, aborting anything buffered in it. Any hung
1600 * zero-copy transmits will therefore complete in finite time. */
1601 ksocknal_connsock_decref(conn);
1605 ksocknal_queue_zombie_conn (ksock_conn_t *conn)
1607 /* Queue the conn for the reaper to destroy */
1609 LASSERT (atomic_read(&conn->ksnc_conn_refcount) == 0);
1610 spin_lock_bh (&ksocknal_data.ksnd_reaper_lock);
1612 list_add_tail(&conn->ksnc_list, &ksocknal_data.ksnd_zombie_conns);
1613 cfs_waitq_signal(&ksocknal_data.ksnd_reaper_waitq);
1615 spin_unlock_bh (&ksocknal_data.ksnd_reaper_lock);
1619 ksocknal_destroy_conn (ksock_conn_t *conn)
1621 /* Final coup-de-grace of the reaper */
1622 CDEBUG (D_NET, "connection %p\n", conn);
1624 LASSERT (atomic_read (&conn->ksnc_conn_refcount) == 0);
1625 LASSERT (atomic_read (&conn->ksnc_sock_refcount) == 0);
1626 LASSERT (conn->ksnc_sock == NULL);
1627 LASSERT (conn->ksnc_route == NULL);
1628 LASSERT (!conn->ksnc_tx_scheduled);
1629 LASSERT (!conn->ksnc_rx_scheduled);
1630 LASSERT (list_empty(&conn->ksnc_tx_queue));
1632 /* complete current receive if any */
1633 switch (conn->ksnc_rx_state) {
1634 case SOCKNAL_RX_LNET_PAYLOAD:
1635 CERROR("Completing partial receive from %s"
1636 ", ip %d.%d.%d.%d:%d, with error\n",
1637 libcfs_id2str(conn->ksnc_peer->ksnp_id),
1638 HIPQUAD(conn->ksnc_ipaddr), conn->ksnc_port);
1639 lnet_finalize (conn->ksnc_peer->ksnp_ni,
1640 conn->ksnc_cookie, -EIO);
1642 case SOCKNAL_RX_LNET_HEADER:
1643 if (conn->ksnc_rx_started)
1644 CERROR("Incomplete receive of lnet header from %s"
1645 ", ip %d.%d.%d.%d:%d, with error, protocol: %d.x.\n",
1646 libcfs_id2str(conn->ksnc_peer->ksnp_id),
1647 HIPQUAD(conn->ksnc_ipaddr), conn->ksnc_port,
1648 conn->ksnc_proto->pro_version);
1650 case SOCKNAL_RX_KSM_HEADER:
1651 if (conn->ksnc_rx_started)
1652 CERROR("Incomplete receive of ksock message from %s"
1653 ", ip %d.%d.%d.%d:%d, with error, protocol: %d.x.\n",
1654 libcfs_id2str(conn->ksnc_peer->ksnp_id),
1655 HIPQUAD(conn->ksnc_ipaddr), conn->ksnc_port,
1656 conn->ksnc_proto->pro_version);
1658 case SOCKNAL_RX_SLOP:
1659 if (conn->ksnc_rx_started)
1660 CERROR("Incomplete receive of slops from %s"
1661 ", ip %d.%d.%d.%d:%d, with error\n",
1662 libcfs_id2str(conn->ksnc_peer->ksnp_id),
1663 HIPQUAD(conn->ksnc_ipaddr), conn->ksnc_port);
1670 ksocknal_peer_decref(conn->ksnc_peer);
1672 LIBCFS_FREE (conn, sizeof (*conn));
1676 ksocknal_close_peer_conns_locked (ksock_peer_t *peer, __u32 ipaddr, int why)
1679 struct list_head *ctmp;
1680 struct list_head *cnxt;
1683 list_for_each_safe (ctmp, cnxt, &peer->ksnp_conns) {
1684 conn = list_entry (ctmp, ksock_conn_t, ksnc_list);
1687 conn->ksnc_ipaddr == ipaddr) {
1689 ksocknal_close_conn_locked (conn, why);
1697 ksocknal_close_conn_and_siblings (ksock_conn_t *conn, int why)
1699 ksock_peer_t *peer = conn->ksnc_peer;
1700 __u32 ipaddr = conn->ksnc_ipaddr;
1703 write_lock_bh (&ksocknal_data.ksnd_global_lock);
1705 count = ksocknal_close_peer_conns_locked (peer, ipaddr, why);
1707 write_unlock_bh (&ksocknal_data.ksnd_global_lock);
1713 ksocknal_close_matching_conns (lnet_process_id_t id, __u32 ipaddr)
1716 struct list_head *ptmp;
1717 struct list_head *pnxt;
1723 write_lock_bh (&ksocknal_data.ksnd_global_lock);
1725 if (id.nid != LNET_NID_ANY)
1726 lo = hi = ksocknal_nid2peerlist(id.nid) - ksocknal_data.ksnd_peers;
1729 hi = ksocknal_data.ksnd_peer_hash_size - 1;
1732 for (i = lo; i <= hi; i++) {
1733 list_for_each_safe (ptmp, pnxt, &ksocknal_data.ksnd_peers[i]) {
1735 peer = list_entry (ptmp, ksock_peer_t, ksnp_list);
1737 if (!((id.nid == LNET_NID_ANY || id.nid == peer->ksnp_id.nid) &&
1738 (id.pid == LNET_PID_ANY || id.pid == peer->ksnp_id.pid)))
1741 count += ksocknal_close_peer_conns_locked (peer, ipaddr, 0);
1745 write_unlock_bh (&ksocknal_data.ksnd_global_lock);
1747 /* wildcards always succeed */
1748 if (id.nid == LNET_NID_ANY || id.pid == LNET_PID_ANY || ipaddr == 0)
1751 return (count == 0 ? -ENOENT : 0);
1755 ksocknal_notify (lnet_ni_t *ni, lnet_nid_t gw_nid, int alive)
1757 /* The router is telling me she's been notified of a change in
1758 * gateway state.... */
1759 lnet_process_id_t id = {.nid = gw_nid, .pid = LNET_PID_ANY};
1761 CDEBUG (D_NET, "gw %s %s\n", libcfs_nid2str(gw_nid),
1762 alive ? "up" : "down");
1765 /* If the gateway crashed, close all open connections... */
1766 ksocknal_close_matching_conns (id, 0);
1770 /* ...otherwise do nothing. We can only establish new connections
1771 * if we have autroutes, and these connect on demand. */
1775 ksocknal_push_peer (ksock_peer_t *peer)
1779 struct list_head *tmp;
1782 for (index = 0; ; index++) {
1783 read_lock (&ksocknal_data.ksnd_global_lock);
1788 list_for_each (tmp, &peer->ksnp_conns) {
1790 conn = list_entry (tmp, ksock_conn_t, ksnc_list);
1791 ksocknal_conn_addref(conn);
1796 read_unlock (&ksocknal_data.ksnd_global_lock);
1801 ksocknal_lib_push_conn (conn);
1802 ksocknal_conn_decref(conn);
1807 ksocknal_push (lnet_ni_t *ni, lnet_process_id_t id)
1810 struct list_head *tmp;
1816 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
1817 for (j = 0; ; j++) {
1818 read_lock (&ksocknal_data.ksnd_global_lock);
1823 list_for_each (tmp, &ksocknal_data.ksnd_peers[i]) {
1824 peer = list_entry(tmp, ksock_peer_t,
1827 if (!((id.nid == LNET_NID_ANY ||
1828 id.nid == peer->ksnp_id.nid) &&
1829 (id.pid == LNET_PID_ANY ||
1830 id.pid == peer->ksnp_id.pid))) {
1836 ksocknal_peer_addref(peer);
1841 read_unlock (&ksocknal_data.ksnd_global_lock);
1845 ksocknal_push_peer (peer);
1846 ksocknal_peer_decref(peer);
1856 ksocknal_add_interface(lnet_ni_t *ni, __u32 ipaddress, __u32 netmask)
1858 ksock_net_t *net = ni->ni_data;
1859 ksock_interface_t *iface;
1863 struct list_head *ptmp;
1865 struct list_head *rtmp;
1866 ksock_route_t *route;
1868 if (ipaddress == 0 ||
1872 write_lock_bh (&ksocknal_data.ksnd_global_lock);
1874 iface = ksocknal_ip2iface(ni, ipaddress);
1875 if (iface != NULL) {
1876 /* silently ignore dups */
1878 } else if (net->ksnn_ninterfaces == LNET_MAX_INTERFACES) {
1881 iface = &net->ksnn_interfaces[net->ksnn_ninterfaces++];
1883 iface->ksni_ipaddr = ipaddress;
1884 iface->ksni_netmask = netmask;
1885 iface->ksni_nroutes = 0;
1886 iface->ksni_npeers = 0;
1888 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
1889 list_for_each(ptmp, &ksocknal_data.ksnd_peers[i]) {
1890 peer = list_entry(ptmp, ksock_peer_t, ksnp_list);
1892 for (j = 0; j < peer->ksnp_n_passive_ips; j++)
1893 if (peer->ksnp_passive_ips[j] == ipaddress)
1894 iface->ksni_npeers++;
1896 list_for_each(rtmp, &peer->ksnp_routes) {
1897 route = list_entry(rtmp, ksock_route_t, ksnr_list);
1899 if (route->ksnr_myipaddr == ipaddress)
1900 iface->ksni_nroutes++;
1906 /* NB only new connections will pay attention to the new interface! */
1909 write_unlock_bh (&ksocknal_data.ksnd_global_lock);
1915 ksocknal_peer_del_interface_locked(ksock_peer_t *peer, __u32 ipaddr)
1917 struct list_head *tmp;
1918 struct list_head *nxt;
1919 ksock_route_t *route;
1924 for (i = 0; i < peer->ksnp_n_passive_ips; i++)
1925 if (peer->ksnp_passive_ips[i] == ipaddr) {
1926 for (j = i+1; j < peer->ksnp_n_passive_ips; j++)
1927 peer->ksnp_passive_ips[j-1] =
1928 peer->ksnp_passive_ips[j];
1929 peer->ksnp_n_passive_ips--;
1933 list_for_each_safe(tmp, nxt, &peer->ksnp_routes) {
1934 route = list_entry (tmp, ksock_route_t, ksnr_list);
1936 if (route->ksnr_myipaddr != ipaddr)
1939 if (route->ksnr_share_count != 0) {
1940 /* Manually created; keep, but unbind */
1941 route->ksnr_myipaddr = 0;
1943 ksocknal_del_route_locked(route);
1947 list_for_each_safe(tmp, nxt, &peer->ksnp_conns) {
1948 conn = list_entry(tmp, ksock_conn_t, ksnc_list);
1950 if (conn->ksnc_myipaddr == ipaddr)
1951 ksocknal_close_conn_locked (conn, 0);
1956 ksocknal_del_interface(lnet_ni_t *ni, __u32 ipaddress)
1958 ksock_net_t *net = ni->ni_data;
1960 struct list_head *tmp;
1961 struct list_head *nxt;
1967 write_lock_bh (&ksocknal_data.ksnd_global_lock);
1969 for (i = 0; i < net->ksnn_ninterfaces; i++) {
1970 this_ip = net->ksnn_interfaces[i].ksni_ipaddr;
1972 if (!(ipaddress == 0 ||
1973 ipaddress == this_ip))
1978 for (j = i+1; j < net->ksnn_ninterfaces; j++)
1979 net->ksnn_interfaces[j-1] =
1980 net->ksnn_interfaces[j];
1982 net->ksnn_ninterfaces--;
1984 for (j = 0; j < ksocknal_data.ksnd_peer_hash_size; j++) {
1985 list_for_each_safe(tmp, nxt, &ksocknal_data.ksnd_peers[j]) {
1986 peer = list_entry(tmp, ksock_peer_t, ksnp_list);
1988 if (peer->ksnp_ni != ni)
1991 ksocknal_peer_del_interface_locked(peer, this_ip);
1996 write_unlock_bh (&ksocknal_data.ksnd_global_lock);
2002 ksocknal_ctl(lnet_ni_t *ni, unsigned int cmd, void *arg)
2004 struct libcfs_ioctl_data *data = arg;
2008 case IOC_LIBCFS_GET_INTERFACE: {
2009 ksock_net_t *net = ni->ni_data;
2010 ksock_interface_t *iface;
2012 read_lock (&ksocknal_data.ksnd_global_lock);
2014 if (data->ioc_count < 0 ||
2015 data->ioc_count >= net->ksnn_ninterfaces) {
2019 iface = &net->ksnn_interfaces[data->ioc_count];
2021 data->ioc_u32[0] = iface->ksni_ipaddr;
2022 data->ioc_u32[1] = iface->ksni_netmask;
2023 data->ioc_u32[2] = iface->ksni_npeers;
2024 data->ioc_u32[3] = iface->ksni_nroutes;
2027 read_unlock (&ksocknal_data.ksnd_global_lock);
2031 case IOC_LIBCFS_ADD_INTERFACE:
2032 return ksocknal_add_interface(ni,
2033 data->ioc_u32[0], /* IP address */
2034 data->ioc_u32[1]); /* net mask */
2036 case IOC_LIBCFS_DEL_INTERFACE:
2037 return ksocknal_del_interface(ni,
2038 data->ioc_u32[0]); /* IP address */
2040 case IOC_LIBCFS_GET_PEER: {
2041 lnet_process_id_t id = {0,};
2046 int share_count = 0;
2048 rc = ksocknal_get_peer_info(ni, data->ioc_count,
2049 &id, &myip, &ip, &port,
2050 &conn_count, &share_count);
2054 data->ioc_nid = id.nid;
2055 data->ioc_count = share_count;
2056 data->ioc_u32[0] = ip;
2057 data->ioc_u32[1] = port;
2058 data->ioc_u32[2] = myip;
2059 data->ioc_u32[3] = conn_count;
2060 data->ioc_u32[4] = id.pid;
2064 case IOC_LIBCFS_ADD_PEER: {
2065 lnet_process_id_t id = {.nid = data->ioc_nid,
2066 .pid = LUSTRE_SRV_LNET_PID};
2067 return ksocknal_add_peer (ni, id,
2068 data->ioc_u32[0], /* IP */
2069 data->ioc_u32[1]); /* port */
2071 case IOC_LIBCFS_DEL_PEER: {
2072 lnet_process_id_t id = {.nid = data->ioc_nid,
2073 .pid = LNET_PID_ANY};
2074 return ksocknal_del_peer (ni, id,
2075 data->ioc_u32[0]); /* IP */
2077 case IOC_LIBCFS_GET_CONN: {
2081 ksock_conn_t *conn = ksocknal_get_conn_by_idx (ni, data->ioc_count);
2086 ksocknal_lib_get_conn_tunables(conn, &txmem, &rxmem, &nagle);
2088 data->ioc_count = txmem;
2089 data->ioc_nid = conn->ksnc_peer->ksnp_id.nid;
2090 data->ioc_flags = nagle;
2091 data->ioc_u32[0] = conn->ksnc_ipaddr;
2092 data->ioc_u32[1] = conn->ksnc_port;
2093 data->ioc_u32[2] = conn->ksnc_myipaddr;
2094 data->ioc_u32[3] = conn->ksnc_type;
2095 data->ioc_u32[4] = conn->ksnc_scheduler -
2096 ksocknal_data.ksnd_schedulers;
2097 data->ioc_u32[5] = rxmem;
2098 data->ioc_u32[6] = conn->ksnc_peer->ksnp_id.pid;
2099 ksocknal_conn_decref(conn);
2103 case IOC_LIBCFS_CLOSE_CONNECTION: {
2104 lnet_process_id_t id = {.nid = data->ioc_nid,
2105 .pid = LNET_PID_ANY};
2107 return ksocknal_close_matching_conns (id,
2110 case IOC_LIBCFS_REGISTER_MYNID:
2111 /* Ignore if this is a noop */
2112 if (data->ioc_nid == ni->ni_nid)
2115 CERROR("obsolete IOC_LIBCFS_REGISTER_MYNID: %s(%s)\n",
2116 libcfs_nid2str(data->ioc_nid),
2117 libcfs_nid2str(ni->ni_nid));
2120 case IOC_LIBCFS_PUSH_CONNECTION: {
2121 lnet_process_id_t id = {.nid = data->ioc_nid,
2122 .pid = LNET_PID_ANY};
2124 return ksocknal_push(ni, id);
2133 ksocknal_free_buffers (void)
2135 LASSERT (atomic_read(&ksocknal_data.ksnd_nactive_txs) == 0);
2137 if (ksocknal_data.ksnd_schedulers != NULL)
2138 LIBCFS_FREE (ksocknal_data.ksnd_schedulers,
2139 sizeof (ksock_sched_t) * ksocknal_data.ksnd_nschedulers);
2141 LIBCFS_FREE (ksocknal_data.ksnd_peers,
2142 sizeof (struct list_head) *
2143 ksocknal_data.ksnd_peer_hash_size);
2145 spin_lock(&ksocknal_data.ksnd_tx_lock);
2147 if (!list_empty(&ksocknal_data.ksnd_idle_noop_txs)) {
2148 struct list_head zlist;
2151 list_add(&zlist, &ksocknal_data.ksnd_idle_noop_txs);
2152 list_del_init(&ksocknal_data.ksnd_idle_noop_txs);
2153 spin_unlock(&ksocknal_data.ksnd_tx_lock);
2155 while(!list_empty(&zlist)) {
2156 tx = list_entry(zlist.next, ksock_tx_t, tx_list);
2157 list_del(&tx->tx_list);
2158 LIBCFS_FREE(tx, tx->tx_desc_size);
2161 spin_unlock(&ksocknal_data.ksnd_tx_lock);
2166 ksocknal_base_shutdown (void)
2168 ksock_sched_t *sched;
2171 CDEBUG(D_MALLOC, "before NAL cleanup: kmem %d\n",
2172 atomic_read (&libcfs_kmemory));
2173 LASSERT (ksocknal_data.ksnd_nnets == 0);
2175 switch (ksocknal_data.ksnd_init) {
2179 case SOCKNAL_INIT_ALL:
2180 case SOCKNAL_INIT_DATA:
2181 LASSERT (ksocknal_data.ksnd_peers != NULL);
2182 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
2183 LASSERT (list_empty (&ksocknal_data.ksnd_peers[i]));
2185 LASSERT (list_empty (&ksocknal_data.ksnd_enomem_conns));
2186 LASSERT (list_empty (&ksocknal_data.ksnd_zombie_conns));
2187 LASSERT (list_empty (&ksocknal_data.ksnd_connd_connreqs));
2188 LASSERT (list_empty (&ksocknal_data.ksnd_connd_routes));
2190 if (ksocknal_data.ksnd_schedulers != NULL)
2191 for (i = 0; i < ksocknal_data.ksnd_nschedulers; i++) {
2192 ksock_sched_t *kss =
2193 &ksocknal_data.ksnd_schedulers[i];
2195 LASSERT (list_empty (&kss->kss_tx_conns));
2196 LASSERT (list_empty (&kss->kss_rx_conns));
2197 LASSERT (list_empty (&kss->kss_zombie_noop_txs));
2198 LASSERT (kss->kss_nconns == 0);
2201 /* flag threads to terminate; wake and wait for them to die */
2202 ksocknal_data.ksnd_shuttingdown = 1;
2203 cfs_waitq_broadcast (&ksocknal_data.ksnd_connd_waitq);
2204 cfs_waitq_broadcast (&ksocknal_data.ksnd_reaper_waitq);
2206 if (ksocknal_data.ksnd_schedulers != NULL)
2207 for (i = 0; i < ksocknal_data.ksnd_nschedulers; i++) {
2208 sched = &ksocknal_data.ksnd_schedulers[i];
2209 cfs_waitq_broadcast(&sched->kss_waitq);
2213 read_lock (&ksocknal_data.ksnd_global_lock);
2214 while (ksocknal_data.ksnd_nthreads != 0) {
2216 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* power of 2? */
2217 "waiting for %d threads to terminate\n",
2218 ksocknal_data.ksnd_nthreads);
2219 read_unlock (&ksocknal_data.ksnd_global_lock);
2220 cfs_pause(cfs_time_seconds(1));
2221 read_lock (&ksocknal_data.ksnd_global_lock);
2223 read_unlock (&ksocknal_data.ksnd_global_lock);
2225 ksocknal_free_buffers();
2227 ksocknal_data.ksnd_init = SOCKNAL_INIT_NOTHING;
2231 CDEBUG(D_MALLOC, "after NAL cleanup: kmem %d\n",
2232 atomic_read (&libcfs_kmemory));
2234 PORTAL_MODULE_UNUSE;
2239 ksocknal_new_incarnation (void)
2243 /* The incarnation number is the time this module loaded and it
2244 * identifies this particular instance of the socknal. Hopefully
2245 * we won't be able to reboot more frequently than 1MHz for the
2246 * forseeable future :) */
2248 do_gettimeofday(&tv);
2250 return (((__u64)tv.tv_sec) * 1000000) + tv.tv_usec;
2254 ksocknal_base_startup (void)
2259 LASSERT (ksocknal_data.ksnd_init == SOCKNAL_INIT_NOTHING);
2260 LASSERT (ksocknal_data.ksnd_nnets == 0);
2262 memset (&ksocknal_data, 0, sizeof (ksocknal_data)); /* zero pointers */
2264 ksocknal_data.ksnd_peer_hash_size = SOCKNAL_PEER_HASH_SIZE;
2265 LIBCFS_ALLOC (ksocknal_data.ksnd_peers,
2266 sizeof (struct list_head) * ksocknal_data.ksnd_peer_hash_size);
2267 if (ksocknal_data.ksnd_peers == NULL)
2270 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++)
2271 CFS_INIT_LIST_HEAD(&ksocknal_data.ksnd_peers[i]);
2273 rwlock_init(&ksocknal_data.ksnd_global_lock);
2275 spin_lock_init (&ksocknal_data.ksnd_reaper_lock);
2276 CFS_INIT_LIST_HEAD (&ksocknal_data.ksnd_enomem_conns);
2277 CFS_INIT_LIST_HEAD (&ksocknal_data.ksnd_zombie_conns);
2278 CFS_INIT_LIST_HEAD (&ksocknal_data.ksnd_deathrow_conns);
2279 cfs_waitq_init(&ksocknal_data.ksnd_reaper_waitq);
2281 spin_lock_init (&ksocknal_data.ksnd_connd_lock);
2282 CFS_INIT_LIST_HEAD (&ksocknal_data.ksnd_connd_connreqs);
2283 CFS_INIT_LIST_HEAD (&ksocknal_data.ksnd_connd_routes);
2284 cfs_waitq_init(&ksocknal_data.ksnd_connd_waitq);
2286 spin_lock_init (&ksocknal_data.ksnd_tx_lock);
2287 CFS_INIT_LIST_HEAD (&ksocknal_data.ksnd_idle_noop_txs);
2289 /* NB memset above zeros whole of ksocknal_data, including
2290 * ksocknal_data.ksnd_irqinfo[all].ksni_valid */
2292 /* flag lists/ptrs/locks initialised */
2293 ksocknal_data.ksnd_init = SOCKNAL_INIT_DATA;
2296 ksocknal_data.ksnd_nschedulers = ksocknal_nsched();
2297 LIBCFS_ALLOC(ksocknal_data.ksnd_schedulers,
2298 sizeof(ksock_sched_t) * ksocknal_data.ksnd_nschedulers);
2299 if (ksocknal_data.ksnd_schedulers == NULL)
2302 for (i = 0; i < ksocknal_data.ksnd_nschedulers; i++) {
2303 ksock_sched_t *kss = &ksocknal_data.ksnd_schedulers[i];
2305 spin_lock_init (&kss->kss_lock);
2306 CFS_INIT_LIST_HEAD (&kss->kss_rx_conns);
2307 CFS_INIT_LIST_HEAD (&kss->kss_tx_conns);
2308 CFS_INIT_LIST_HEAD (&kss->kss_zombie_noop_txs);
2309 cfs_waitq_init (&kss->kss_waitq);
2312 for (i = 0; i < ksocknal_data.ksnd_nschedulers; i++) {
2313 rc = ksocknal_thread_start (ksocknal_scheduler,
2314 &ksocknal_data.ksnd_schedulers[i]);
2316 CERROR("Can't spawn socknal scheduler[%d]: %d\n",
2322 /* must have at least 2 connds to remain responsive to accepts while
2324 if (*ksocknal_tunables.ksnd_nconnds < 2)
2325 *ksocknal_tunables.ksnd_nconnds = 2;
2327 for (i = 0; i < *ksocknal_tunables.ksnd_nconnds; i++) {
2328 rc = ksocknal_thread_start (ksocknal_connd, (void *)((long)i));
2330 CERROR("Can't spawn socknal connd: %d\n", rc);
2335 rc = ksocknal_thread_start (ksocknal_reaper, NULL);
2337 CERROR ("Can't spawn socknal reaper: %d\n", rc);
2341 /* flag everything initialised */
2342 ksocknal_data.ksnd_init = SOCKNAL_INIT_ALL;
2347 ksocknal_base_shutdown();
2352 ksocknal_debug_peerhash (lnet_ni_t *ni)
2354 ksock_peer_t *peer = NULL;
2355 struct list_head *tmp;
2358 read_lock (&ksocknal_data.ksnd_global_lock);
2360 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
2361 list_for_each (tmp, &ksocknal_data.ksnd_peers[i]) {
2362 peer = list_entry (tmp, ksock_peer_t, ksnp_list);
2364 if (peer->ksnp_ni == ni) break;
2371 ksock_route_t *route;
2374 CWARN ("Active peer on shutdown: %s, ref %d, scnt %d, "
2375 "closing %d, accepting %d, err %d, zcookie "LPU64", "
2376 "txq %d, zc_req %d\n", libcfs_id2str(peer->ksnp_id),
2377 atomic_read(&peer->ksnp_refcount),
2378 peer->ksnp_sharecount, peer->ksnp_closing,
2379 peer->ksnp_accepting, peer->ksnp_error,
2380 peer->ksnp_zc_next_cookie,
2381 !list_empty(&peer->ksnp_tx_queue),
2382 !list_empty(&peer->ksnp_zc_req_list));
2384 list_for_each (tmp, &peer->ksnp_routes) {
2385 route = list_entry(tmp, ksock_route_t, ksnr_list);
2386 CWARN ("Route: ref %d, schd %d, conn %d, cnted %d, "
2387 "del %d\n", atomic_read(&route->ksnr_refcount),
2388 route->ksnr_scheduled, route->ksnr_connecting,
2389 route->ksnr_connected, route->ksnr_deleted);
2392 list_for_each (tmp, &peer->ksnp_conns) {
2393 conn = list_entry(tmp, ksock_conn_t, ksnc_list);
2394 CWARN ("Conn: ref %d, sref %d, t %d, c %d\n",
2395 atomic_read(&conn->ksnc_conn_refcount),
2396 atomic_read(&conn->ksnc_sock_refcount),
2397 conn->ksnc_type, conn->ksnc_closing);
2401 read_unlock (&ksocknal_data.ksnd_global_lock);
2406 ksocknal_shutdown (lnet_ni_t *ni)
2408 ksock_net_t *net = ni->ni_data;
2410 lnet_process_id_t anyid = {.nid = LNET_NID_ANY,
2411 .pid = LNET_PID_ANY};
2413 LASSERT(ksocknal_data.ksnd_init == SOCKNAL_INIT_ALL);
2414 LASSERT(ksocknal_data.ksnd_nnets > 0);
2416 spin_lock_bh (&net->ksnn_lock);
2417 net->ksnn_shutdown = 1; /* prevent new peers */
2418 spin_unlock_bh (&net->ksnn_lock);
2420 /* Delete all peers */
2421 ksocknal_del_peer(ni, anyid, 0);
2423 /* Wait for all peer state to clean up */
2425 spin_lock_bh (&net->ksnn_lock);
2426 while (net->ksnn_npeers != 0) {
2427 spin_unlock_bh (&net->ksnn_lock);
2430 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* power of 2? */
2431 "waiting for %d peers to disconnect\n",
2433 cfs_pause(cfs_time_seconds(1));
2435 ksocknal_debug_peerhash(ni);
2437 spin_lock_bh (&net->ksnn_lock);
2439 spin_unlock_bh (&net->ksnn_lock);
2441 for (i = 0; i < net->ksnn_ninterfaces; i++) {
2442 LASSERT (net->ksnn_interfaces[i].ksni_npeers == 0);
2443 LASSERT (net->ksnn_interfaces[i].ksni_nroutes == 0);
2446 LIBCFS_FREE(net, sizeof(*net));
2448 ksocknal_data.ksnd_nnets--;
2449 if (ksocknal_data.ksnd_nnets == 0)
2450 ksocknal_base_shutdown();
2454 ksocknal_enumerate_interfaces(ksock_net_t *net)
2462 n = libcfs_ipif_enumerate(&names);
2464 CERROR("Can't enumerate interfaces: %d\n", n);
2468 for (i = j = 0; i < n; i++) {
2473 if (!strcmp(names[i], "lo")) /* skip the loopback IF */
2476 rc = libcfs_ipif_query(names[i], &up, &ip, &mask);
2478 CWARN("Can't get interface %s info: %d\n",
2484 CWARN("Ignoring interface %s (down)\n",
2489 if (j == LNET_MAX_INTERFACES) {
2490 CWARN("Ignoring interface %s (too many interfaces)\n",
2495 net->ksnn_interfaces[j].ksni_ipaddr = ip;
2496 net->ksnn_interfaces[j].ksni_netmask = mask;
2500 libcfs_ipif_free_enumeration(names, n);
2503 CERROR("Can't find any usable interfaces\n");
2509 ksocknal_startup (lnet_ni_t *ni)
2515 LASSERT (ni->ni_lnd == &the_ksocklnd);
2517 if (ksocknal_data.ksnd_init == SOCKNAL_INIT_NOTHING) {
2518 rc = ksocknal_base_startup();
2523 LIBCFS_ALLOC(net, sizeof(*net));
2527 memset(net, 0, sizeof(*net));
2528 spin_lock_init(&net->ksnn_lock);
2529 net->ksnn_incarnation = ksocknal_new_incarnation();
2531 ni->ni_maxtxcredits = *ksocknal_tunables.ksnd_credits;
2532 ni->ni_peertxcredits = *ksocknal_tunables.ksnd_peercredits;
2534 if (ni->ni_interfaces[0] == NULL) {
2535 rc = ksocknal_enumerate_interfaces(net);
2539 net->ksnn_ninterfaces = 1;
2541 for (i = 0; i < LNET_MAX_INTERFACES; i++) {
2544 if (ni->ni_interfaces[i] == NULL)
2547 rc = libcfs_ipif_query(
2548 ni->ni_interfaces[i], &up,
2549 &net->ksnn_interfaces[i].ksni_ipaddr,
2550 &net->ksnn_interfaces[i].ksni_netmask);
2553 CERROR("Can't get interface %s info: %d\n",
2554 ni->ni_interfaces[i], rc);
2559 CERROR("Interface %s is down\n",
2560 ni->ni_interfaces[i]);
2564 net->ksnn_ninterfaces = i;
2567 ni->ni_nid = LNET_MKNID(LNET_NIDNET(ni->ni_nid),
2568 net->ksnn_interfaces[0].ksni_ipaddr);
2570 ksocknal_data.ksnd_nnets++;
2575 LIBCFS_FREE(net, sizeof(*net));
2577 if (ksocknal_data.ksnd_nnets == 0)
2578 ksocknal_base_shutdown();
2585 ksocknal_module_fini (void)
2587 lnet_unregister_lnd(&the_ksocklnd);
2588 ksocknal_lib_tunables_fini();
2592 ksocknal_module_init (void)
2596 /* check ksnr_connected/connecting field large enough */
2597 CLASSERT(SOCKLND_CONN_NTYPES <= 4);
2599 rc = ksocknal_lib_tunables_init();
2603 lnet_register_lnd(&the_ksocklnd);
2608 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
2609 MODULE_DESCRIPTION("Kernel TCP Socket LND v2.0.0");
2610 MODULE_LICENSE("GPL");
2612 cfs_module(ksocknal, "2.0.0", ksocknal_module_init, ksocknal_module_fini);