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>
47 ksock_nal_data_t ksocknal_data;
50 ksocknal_ip2iface(lnet_ni_t *ni, __u32 ip)
52 ksock_net_t *net = ni->ni_data;
54 ksock_interface_t *iface;
56 for (i = 0; i < net->ksnn_ninterfaces; i++) {
57 LASSERT(i < LNET_MAX_INTERFACES);
58 iface = &net->ksnn_interfaces[i];
60 if (iface->ksni_ipaddr == ip)
68 ksocknal_create_route (__u32 ipaddr, int port)
72 LIBCFS_ALLOC (route, sizeof (*route));
76 cfs_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;
92 ksocknal_destroy_route (ksock_route_t *route)
94 LASSERT (cfs_atomic_read(&route->ksnr_refcount) == 0);
96 if (route->ksnr_peer != NULL)
97 ksocknal_peer_decref(route->ksnr_peer);
99 LIBCFS_FREE (route, sizeof (*route));
103 ksocknal_create_peer (ksock_peer_t **peerp, lnet_ni_t *ni, lnet_process_id_t id)
105 ksock_net_t *net = ni->ni_data;
108 LASSERT (id.nid != LNET_NID_ANY);
109 LASSERT (id.pid != LNET_PID_ANY);
110 LASSERT (!cfs_in_interrupt());
112 LIBCFS_ALLOC (peer, sizeof (*peer));
116 memset (peer, 0, sizeof (*peer)); /* NULL pointers/clear flags etc */
120 cfs_atomic_set (&peer->ksnp_refcount, 1); /* 1 ref for caller */
121 peer->ksnp_closing = 0;
122 peer->ksnp_accepting = 0;
123 peer->ksnp_proto = NULL;
124 peer->ksnp_last_alive = 0;
125 peer->ksnp_zc_next_cookie = SOCKNAL_KEEPALIVE_PING + 1;
127 CFS_INIT_LIST_HEAD (&peer->ksnp_conns);
128 CFS_INIT_LIST_HEAD (&peer->ksnp_routes);
129 CFS_INIT_LIST_HEAD (&peer->ksnp_tx_queue);
130 CFS_INIT_LIST_HEAD (&peer->ksnp_zc_req_list);
131 cfs_spin_lock_init(&peer->ksnp_lock);
133 cfs_spin_lock_bh (&net->ksnn_lock);
135 if (net->ksnn_shutdown) {
136 cfs_spin_unlock_bh (&net->ksnn_lock);
138 LIBCFS_FREE(peer, sizeof(*peer));
139 CERROR("Can't create peer: network shutdown\n");
145 cfs_spin_unlock_bh (&net->ksnn_lock);
152 ksocknal_destroy_peer (ksock_peer_t *peer)
154 ksock_net_t *net = peer->ksnp_ni->ni_data;
156 CDEBUG (D_NET, "peer %s %p deleted\n",
157 libcfs_id2str(peer->ksnp_id), peer);
159 LASSERT (cfs_atomic_read (&peer->ksnp_refcount) == 0);
160 LASSERT (peer->ksnp_accepting == 0);
161 LASSERT (list_empty (&peer->ksnp_conns));
162 LASSERT (list_empty (&peer->ksnp_routes));
163 LASSERT (list_empty (&peer->ksnp_tx_queue));
164 LASSERT (list_empty (&peer->ksnp_zc_req_list));
166 LIBCFS_FREE (peer, sizeof (*peer));
168 /* NB a peer's connections and routes keep a reference on their peer
169 * until they are destroyed, so we can be assured that _all_ state to
170 * do with this peer has been cleaned up when its refcount drops to
172 cfs_spin_lock_bh (&net->ksnn_lock);
174 cfs_spin_unlock_bh (&net->ksnn_lock);
178 ksocknal_find_peer_locked (lnet_ni_t *ni, lnet_process_id_t id)
180 struct list_head *peer_list = ksocknal_nid2peerlist(id.nid);
181 struct list_head *tmp;
184 list_for_each (tmp, peer_list) {
186 peer = list_entry (tmp, ksock_peer_t, ksnp_list);
188 LASSERT (!peer->ksnp_closing);
190 if (peer->ksnp_ni != ni)
193 if (peer->ksnp_id.nid != id.nid ||
194 peer->ksnp_id.pid != id.pid)
197 CDEBUG(D_NET, "got peer [%p] -> %s (%d)\n",
198 peer, libcfs_id2str(id),
199 cfs_atomic_read(&peer->ksnp_refcount));
206 ksocknal_find_peer (lnet_ni_t *ni, lnet_process_id_t id)
210 cfs_read_lock (&ksocknal_data.ksnd_global_lock);
211 peer = ksocknal_find_peer_locked (ni, id);
212 if (peer != NULL) /* +1 ref for caller? */
213 ksocknal_peer_addref(peer);
214 cfs_read_unlock (&ksocknal_data.ksnd_global_lock);
220 ksocknal_unlink_peer_locked (ksock_peer_t *peer)
224 ksock_interface_t *iface;
226 for (i = 0; i < peer->ksnp_n_passive_ips; i++) {
227 LASSERT (i < LNET_MAX_INTERFACES);
228 ip = peer->ksnp_passive_ips[i];
230 iface = ksocknal_ip2iface(peer->ksnp_ni, ip);
231 /* All IPs in peer->ksnp_passive_ips[] come from the
232 * interface list, therefore the call must succeed. */
233 LASSERT (iface != NULL);
235 CDEBUG(D_NET, "peer=%p iface=%p ksni_nroutes=%d\n",
236 peer, iface, iface->ksni_nroutes);
237 iface->ksni_npeers--;
240 LASSERT (list_empty(&peer->ksnp_conns));
241 LASSERT (list_empty(&peer->ksnp_routes));
242 LASSERT (!peer->ksnp_closing);
243 peer->ksnp_closing = 1;
244 list_del (&peer->ksnp_list);
245 /* lose peerlist's ref */
246 ksocknal_peer_decref(peer);
250 ksocknal_get_peer_info (lnet_ni_t *ni, int index,
251 lnet_process_id_t *id, __u32 *myip, __u32 *peer_ip, int *port,
252 int *conn_count, int *share_count)
255 struct list_head *ptmp;
256 ksock_route_t *route;
257 struct list_head *rtmp;
262 cfs_read_lock (&ksocknal_data.ksnd_global_lock);
264 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
266 list_for_each (ptmp, &ksocknal_data.ksnd_peers[i]) {
267 peer = list_entry (ptmp, ksock_peer_t, ksnp_list);
269 if (peer->ksnp_ni != ni)
272 if (peer->ksnp_n_passive_ips == 0 &&
273 list_empty(&peer->ksnp_routes)) {
287 for (j = 0; j < peer->ksnp_n_passive_ips; j++) {
292 *myip = peer->ksnp_passive_ips[j];
301 list_for_each (rtmp, &peer->ksnp_routes) {
305 route = list_entry(rtmp, ksock_route_t,
309 *myip = route->ksnr_myipaddr;
310 *peer_ip = route->ksnr_ipaddr;
311 *port = route->ksnr_port;
312 *conn_count = route->ksnr_conn_count;
313 *share_count = route->ksnr_share_count;
320 cfs_read_unlock (&ksocknal_data.ksnd_global_lock);
325 ksocknal_associate_route_conn_locked(ksock_route_t *route, ksock_conn_t *conn)
327 ksock_peer_t *peer = route->ksnr_peer;
328 int type = conn->ksnc_type;
329 ksock_interface_t *iface;
331 conn->ksnc_route = route;
332 ksocknal_route_addref(route);
334 if (route->ksnr_myipaddr != conn->ksnc_myipaddr) {
335 if (route->ksnr_myipaddr == 0) {
336 /* route wasn't bound locally yet (the initial route) */
337 CDEBUG(D_NET, "Binding %s %u.%u.%u.%u to %u.%u.%u.%u\n",
338 libcfs_id2str(peer->ksnp_id),
339 HIPQUAD(route->ksnr_ipaddr),
340 HIPQUAD(conn->ksnc_myipaddr));
342 CDEBUG(D_NET, "Rebinding %s %u.%u.%u.%u from "
343 "%u.%u.%u.%u to %u.%u.%u.%u\n",
344 libcfs_id2str(peer->ksnp_id),
345 HIPQUAD(route->ksnr_ipaddr),
346 HIPQUAD(route->ksnr_myipaddr),
347 HIPQUAD(conn->ksnc_myipaddr));
349 iface = ksocknal_ip2iface(route->ksnr_peer->ksnp_ni,
350 route->ksnr_myipaddr);
352 iface->ksni_nroutes--;
354 route->ksnr_myipaddr = conn->ksnc_myipaddr;
355 iface = ksocknal_ip2iface(route->ksnr_peer->ksnp_ni,
356 route->ksnr_myipaddr);
358 iface->ksni_nroutes++;
361 route->ksnr_connected |= (1<<type);
362 route->ksnr_conn_count++;
364 /* Successful connection => further attempts can
365 * proceed immediately */
366 route->ksnr_retry_interval = 0;
370 ksocknal_add_route_locked (ksock_peer_t *peer, ksock_route_t *route)
372 struct list_head *tmp;
374 ksock_route_t *route2;
376 LASSERT (!peer->ksnp_closing);
377 LASSERT (route->ksnr_peer == NULL);
378 LASSERT (!route->ksnr_scheduled);
379 LASSERT (!route->ksnr_connecting);
380 LASSERT (route->ksnr_connected == 0);
382 /* LASSERT(unique) */
383 list_for_each(tmp, &peer->ksnp_routes) {
384 route2 = list_entry(tmp, ksock_route_t, ksnr_list);
386 if (route2->ksnr_ipaddr == route->ksnr_ipaddr) {
387 CERROR ("Duplicate route %s %u.%u.%u.%u\n",
388 libcfs_id2str(peer->ksnp_id),
389 HIPQUAD(route->ksnr_ipaddr));
394 route->ksnr_peer = peer;
395 ksocknal_peer_addref(peer);
396 /* peer's routelist takes over my ref on 'route' */
397 list_add_tail(&route->ksnr_list, &peer->ksnp_routes);
399 list_for_each(tmp, &peer->ksnp_conns) {
400 conn = list_entry(tmp, ksock_conn_t, ksnc_list);
402 if (conn->ksnc_ipaddr != route->ksnr_ipaddr)
405 ksocknal_associate_route_conn_locked(route, conn);
406 /* keep going (typed routes) */
411 ksocknal_del_route_locked (ksock_route_t *route)
413 ksock_peer_t *peer = route->ksnr_peer;
414 ksock_interface_t *iface;
416 struct list_head *ctmp;
417 struct list_head *cnxt;
419 LASSERT (!route->ksnr_deleted);
421 /* Close associated conns */
422 list_for_each_safe (ctmp, cnxt, &peer->ksnp_conns) {
423 conn = list_entry(ctmp, ksock_conn_t, ksnc_list);
425 if (conn->ksnc_route != route)
428 ksocknal_close_conn_locked (conn, 0);
431 if (route->ksnr_myipaddr != 0) {
432 iface = ksocknal_ip2iface(route->ksnr_peer->ksnp_ni,
433 route->ksnr_myipaddr);
435 iface->ksni_nroutes--;
438 route->ksnr_deleted = 1;
439 list_del (&route->ksnr_list);
440 ksocknal_route_decref(route); /* drop peer's ref */
442 if (list_empty (&peer->ksnp_routes) &&
443 list_empty (&peer->ksnp_conns)) {
444 /* I've just removed the last route to a peer with no active
446 ksocknal_unlink_peer_locked (peer);
451 ksocknal_add_peer (lnet_ni_t *ni, lnet_process_id_t id, __u32 ipaddr, int port)
453 struct list_head *tmp;
456 ksock_route_t *route;
457 ksock_route_t *route2;
460 if (id.nid == LNET_NID_ANY ||
461 id.pid == LNET_PID_ANY)
464 /* Have a brand new peer ready... */
465 rc = ksocknal_create_peer(&peer, ni, id);
469 route = ksocknal_create_route (ipaddr, port);
471 ksocknal_peer_decref(peer);
475 cfs_write_lock_bh (&ksocknal_data.ksnd_global_lock);
477 /* always called with a ref on ni, so shutdown can't have started */
478 LASSERT (((ksock_net_t *) ni->ni_data)->ksnn_shutdown == 0);
480 peer2 = ksocknal_find_peer_locked (ni, id);
482 ksocknal_peer_decref(peer);
485 /* peer table takes my ref on peer */
486 list_add_tail (&peer->ksnp_list,
487 ksocknal_nid2peerlist (id.nid));
491 list_for_each (tmp, &peer->ksnp_routes) {
492 route2 = list_entry(tmp, ksock_route_t, ksnr_list);
494 if (route2->ksnr_ipaddr == ipaddr)
499 if (route2 == NULL) {
500 ksocknal_add_route_locked(peer, route);
501 route->ksnr_share_count++;
503 ksocknal_route_decref(route);
504 route2->ksnr_share_count++;
507 cfs_write_unlock_bh (&ksocknal_data.ksnd_global_lock);
513 ksocknal_del_peer_locked (ksock_peer_t *peer, __u32 ip)
516 ksock_route_t *route;
517 struct list_head *tmp;
518 struct list_head *nxt;
521 LASSERT (!peer->ksnp_closing);
523 /* Extra ref prevents peer disappearing until I'm done with it */
524 ksocknal_peer_addref(peer);
526 list_for_each_safe (tmp, nxt, &peer->ksnp_routes) {
527 route = list_entry(tmp, ksock_route_t, ksnr_list);
530 if (!(ip == 0 || route->ksnr_ipaddr == ip))
533 route->ksnr_share_count = 0;
534 /* This deletes associated conns too */
535 ksocknal_del_route_locked (route);
539 list_for_each_safe (tmp, nxt, &peer->ksnp_routes) {
540 route = list_entry(tmp, ksock_route_t, ksnr_list);
541 nshared += route->ksnr_share_count;
545 /* remove everything else if there are no explicit entries
548 list_for_each_safe (tmp, nxt, &peer->ksnp_routes) {
549 route = list_entry(tmp, ksock_route_t, ksnr_list);
551 /* we should only be removing auto-entries */
552 LASSERT(route->ksnr_share_count == 0);
553 ksocknal_del_route_locked (route);
556 list_for_each_safe (tmp, nxt, &peer->ksnp_conns) {
557 conn = list_entry(tmp, ksock_conn_t, ksnc_list);
559 ksocknal_close_conn_locked(conn, 0);
563 ksocknal_peer_decref(peer);
564 /* NB peer unlinks itself when last conn/route is removed */
568 ksocknal_del_peer (lnet_ni_t *ni, lnet_process_id_t id, __u32 ip)
570 CFS_LIST_HEAD (zombies);
571 struct list_head *ptmp;
572 struct list_head *pnxt;
579 cfs_write_lock_bh (&ksocknal_data.ksnd_global_lock);
581 if (id.nid != LNET_NID_ANY)
582 lo = hi = (int)(ksocknal_nid2peerlist(id.nid) - ksocknal_data.ksnd_peers);
585 hi = ksocknal_data.ksnd_peer_hash_size - 1;
588 for (i = lo; i <= hi; i++) {
589 list_for_each_safe (ptmp, pnxt, &ksocknal_data.ksnd_peers[i]) {
590 peer = list_entry (ptmp, ksock_peer_t, ksnp_list);
592 if (peer->ksnp_ni != ni)
595 if (!((id.nid == LNET_NID_ANY || peer->ksnp_id.nid == id.nid) &&
596 (id.pid == LNET_PID_ANY || peer->ksnp_id.pid == id.pid)))
599 ksocknal_peer_addref(peer); /* a ref for me... */
601 ksocknal_del_peer_locked (peer, ip);
603 if (peer->ksnp_closing && !list_empty(&peer->ksnp_tx_queue)) {
604 LASSERT (list_empty(&peer->ksnp_conns));
605 LASSERT (list_empty(&peer->ksnp_routes));
607 list_splice_init(&peer->ksnp_tx_queue, &zombies);
610 ksocknal_peer_decref(peer); /* ...till here */
612 rc = 0; /* matched! */
616 cfs_write_unlock_bh (&ksocknal_data.ksnd_global_lock);
618 ksocknal_txlist_done(ni, &zombies, 1);
624 ksocknal_get_conn_by_idx (lnet_ni_t *ni, int index)
627 struct list_head *ptmp;
629 struct list_head *ctmp;
632 cfs_read_lock (&ksocknal_data.ksnd_global_lock);
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);
638 LASSERT (!peer->ksnp_closing);
640 if (peer->ksnp_ni != ni)
643 list_for_each (ctmp, &peer->ksnp_conns) {
647 conn = list_entry (ctmp, ksock_conn_t, ksnc_list);
648 ksocknal_conn_addref(conn);
649 cfs_read_unlock (&ksocknal_data.ksnd_global_lock);
655 cfs_read_unlock (&ksocknal_data.ksnd_global_lock);
660 ksocknal_choose_scheduler_locked (unsigned int irq)
662 ksock_sched_t *sched;
663 ksock_irqinfo_t *info;
666 LASSERT (irq < NR_IRQS);
667 info = &ksocknal_data.ksnd_irqinfo[irq];
669 if (irq != 0 && /* hardware NIC */
670 info->ksni_valid) { /* already set up */
671 return (&ksocknal_data.ksnd_schedulers[info->ksni_sched]);
674 /* software NIC (irq == 0) || not associated with a scheduler yet.
675 * Choose the CPU with the fewest connections... */
676 sched = &ksocknal_data.ksnd_schedulers[0];
677 for (i = 1; i < ksocknal_data.ksnd_nschedulers; i++)
678 if (sched->kss_nconns >
679 ksocknal_data.ksnd_schedulers[i].kss_nconns)
680 sched = &ksocknal_data.ksnd_schedulers[i];
682 if (irq != 0) { /* Hardware NIC */
683 info->ksni_valid = 1;
684 info->ksni_sched = (unsigned int)(sched - ksocknal_data.ksnd_schedulers);
687 LASSERT (info->ksni_sched == (unsigned int)(sched - ksocknal_data.ksnd_schedulers));
694 ksocknal_local_ipvec (lnet_ni_t *ni, __u32 *ipaddrs)
696 ksock_net_t *net = ni->ni_data;
700 cfs_read_lock (&ksocknal_data.ksnd_global_lock);
702 nip = net->ksnn_ninterfaces;
703 LASSERT (nip <= LNET_MAX_INTERFACES);
705 /* Only offer interfaces for additional connections if I have
708 cfs_read_unlock (&ksocknal_data.ksnd_global_lock);
712 for (i = 0; i < nip; i++) {
713 ipaddrs[i] = net->ksnn_interfaces[i].ksni_ipaddr;
714 LASSERT (ipaddrs[i] != 0);
717 cfs_read_unlock (&ksocknal_data.ksnd_global_lock);
722 ksocknal_match_peerip (ksock_interface_t *iface, __u32 *ips, int nips)
724 int best_netmatch = 0;
731 for (i = 0; i < nips; i++) {
735 this_xor = (ips[i] ^ iface->ksni_ipaddr);
736 this_netmatch = ((this_xor & iface->ksni_netmask) == 0) ? 1 : 0;
739 best_netmatch < this_netmatch ||
740 (best_netmatch == this_netmatch &&
741 best_xor > this_xor)))
745 best_netmatch = this_netmatch;
754 ksocknal_select_ips(ksock_peer_t *peer, __u32 *peerips, int n_peerips)
756 cfs_rwlock_t *global_lock = &ksocknal_data.ksnd_global_lock;
757 ksock_net_t *net = peer->ksnp_ni->ni_data;
758 ksock_interface_t *iface;
759 ksock_interface_t *best_iface;
770 /* CAVEAT EMPTOR: We do all our interface matching with an
771 * exclusive hold of global lock at IRQ priority. We're only
772 * expecting to be dealing with small numbers of interfaces, so the
773 * O(n**3)-ness shouldn't matter */
775 /* Also note that I'm not going to return more than n_peerips
776 * interfaces, even if I have more myself */
778 cfs_write_lock_bh (global_lock);
780 LASSERT (n_peerips <= LNET_MAX_INTERFACES);
781 LASSERT (net->ksnn_ninterfaces <= LNET_MAX_INTERFACES);
783 /* Only match interfaces for additional connections
784 * if I have > 1 interface */
785 n_ips = (net->ksnn_ninterfaces < 2) ? 0 :
786 MIN(n_peerips, net->ksnn_ninterfaces);
788 for (i = 0; peer->ksnp_n_passive_ips < n_ips; i++) {
789 /* ^ yes really... */
791 /* If we have any new interfaces, first tick off all the
792 * peer IPs that match old interfaces, then choose new
793 * interfaces to match the remaining peer IPS.
794 * We don't forget interfaces we've stopped using; we might
795 * start using them again... */
797 if (i < peer->ksnp_n_passive_ips) {
799 ip = peer->ksnp_passive_ips[i];
800 best_iface = ksocknal_ip2iface(peer->ksnp_ni, ip);
802 /* peer passive ips are kept up to date */
803 LASSERT(best_iface != NULL);
805 /* choose a new interface */
806 LASSERT (i == peer->ksnp_n_passive_ips);
812 for (j = 0; j < net->ksnn_ninterfaces; j++) {
813 iface = &net->ksnn_interfaces[j];
814 ip = iface->ksni_ipaddr;
816 for (k = 0; k < peer->ksnp_n_passive_ips; k++)
817 if (peer->ksnp_passive_ips[k] == ip)
820 if (k < peer->ksnp_n_passive_ips) /* using it already */
823 k = ksocknal_match_peerip(iface, peerips, n_peerips);
824 xor = (ip ^ peerips[k]);
825 this_netmatch = ((xor & iface->ksni_netmask) == 0) ? 1 : 0;
827 if (!(best_iface == NULL ||
828 best_netmatch < this_netmatch ||
829 (best_netmatch == this_netmatch &&
830 best_npeers > iface->ksni_npeers)))
834 best_netmatch = this_netmatch;
835 best_npeers = iface->ksni_npeers;
838 best_iface->ksni_npeers++;
839 ip = best_iface->ksni_ipaddr;
840 peer->ksnp_passive_ips[i] = ip;
841 peer->ksnp_n_passive_ips = i+1;
844 LASSERT (best_iface != NULL);
846 /* mark the best matching peer IP used */
847 j = ksocknal_match_peerip(best_iface, peerips, n_peerips);
851 /* Overwrite input peer IP addresses */
852 memcpy(peerips, peer->ksnp_passive_ips, n_ips * sizeof(*peerips));
854 cfs_write_unlock_bh (global_lock);
860 ksocknal_create_routes(ksock_peer_t *peer, int port,
861 __u32 *peer_ipaddrs, int npeer_ipaddrs)
863 ksock_route_t *newroute = NULL;
864 cfs_rwlock_t *global_lock = &ksocknal_data.ksnd_global_lock;
865 lnet_ni_t *ni = peer->ksnp_ni;
866 ksock_net_t *net = ni->ni_data;
867 struct list_head *rtmp;
868 ksock_route_t *route;
869 ksock_interface_t *iface;
870 ksock_interface_t *best_iface;
877 /* CAVEAT EMPTOR: We do all our interface matching with an
878 * exclusive hold of global lock at IRQ priority. We're only
879 * expecting to be dealing with small numbers of interfaces, so the
880 * O(n**3)-ness here shouldn't matter */
882 cfs_write_lock_bh (global_lock);
884 if (net->ksnn_ninterfaces < 2) {
885 /* Only create additional connections
886 * if I have > 1 interface */
887 cfs_write_unlock_bh (global_lock);
891 LASSERT (npeer_ipaddrs <= LNET_MAX_INTERFACES);
893 for (i = 0; i < npeer_ipaddrs; i++) {
894 if (newroute != NULL) {
895 newroute->ksnr_ipaddr = peer_ipaddrs[i];
897 cfs_write_unlock_bh (global_lock);
899 newroute = ksocknal_create_route(peer_ipaddrs[i], port);
900 if (newroute == NULL)
903 cfs_write_lock_bh (global_lock);
906 if (peer->ksnp_closing) {
907 /* peer got closed under me */
911 /* Already got a route? */
913 list_for_each(rtmp, &peer->ksnp_routes) {
914 route = list_entry(rtmp, ksock_route_t, ksnr_list);
916 if (route->ksnr_ipaddr == newroute->ksnr_ipaddr)
928 LASSERT (net->ksnn_ninterfaces <= LNET_MAX_INTERFACES);
930 /* Select interface to connect from */
931 for (j = 0; j < net->ksnn_ninterfaces; j++) {
932 iface = &net->ksnn_interfaces[j];
934 /* Using this interface already? */
935 list_for_each(rtmp, &peer->ksnp_routes) {
936 route = list_entry(rtmp, ksock_route_t, ksnr_list);
938 if (route->ksnr_myipaddr == iface->ksni_ipaddr)
946 this_netmatch = (((iface->ksni_ipaddr ^
947 newroute->ksnr_ipaddr) &
948 iface->ksni_netmask) == 0) ? 1 : 0;
950 if (!(best_iface == NULL ||
951 best_netmatch < this_netmatch ||
952 (best_netmatch == this_netmatch &&
953 best_nroutes > iface->ksni_nroutes)))
957 best_netmatch = this_netmatch;
958 best_nroutes = iface->ksni_nroutes;
961 if (best_iface == NULL)
964 newroute->ksnr_myipaddr = best_iface->ksni_ipaddr;
965 best_iface->ksni_nroutes++;
967 ksocknal_add_route_locked(peer, newroute);
971 cfs_write_unlock_bh (global_lock);
972 if (newroute != NULL)
973 ksocknal_route_decref(newroute);
977 ksocknal_accept (lnet_ni_t *ni, cfs_socket_t *sock)
984 rc = libcfs_sock_getaddr(sock, 1, &peer_ip, &peer_port);
985 LASSERT (rc == 0); /* we succeeded before */
987 LIBCFS_ALLOC(cr, sizeof(*cr));
989 LCONSOLE_ERROR_MSG(0x12f, "Dropping connection request from "
990 "%u.%u.%u.%u: memory exhausted\n",
997 cr->ksncr_sock = sock;
999 cfs_spin_lock_bh (&ksocknal_data.ksnd_connd_lock);
1001 list_add_tail(&cr->ksncr_list, &ksocknal_data.ksnd_connd_connreqs);
1002 cfs_waitq_signal(&ksocknal_data.ksnd_connd_waitq);
1004 cfs_spin_unlock_bh (&ksocknal_data.ksnd_connd_lock);
1009 ksocknal_connecting (ksock_peer_t *peer, __u32 ipaddr)
1011 ksock_route_t *route;
1013 cfs_list_for_each_entry_typed (route, &peer->ksnp_routes,
1014 ksock_route_t, ksnr_list) {
1016 if (route->ksnr_ipaddr == ipaddr)
1017 return route->ksnr_connecting;
1023 ksocknal_create_conn (lnet_ni_t *ni, ksock_route_t *route,
1024 cfs_socket_t *sock, int type)
1026 cfs_rwlock_t *global_lock = &ksocknal_data.ksnd_global_lock;
1027 CFS_LIST_HEAD (zombies);
1028 lnet_process_id_t peerid;
1029 struct list_head *tmp;
1032 ksock_conn_t *conn2;
1033 ksock_peer_t *peer = NULL;
1034 ksock_peer_t *peer2;
1035 ksock_sched_t *sched;
1036 ksock_hello_msg_t *hello;
1044 active = (route != NULL);
1046 LASSERT (active == (type != SOCKLND_CONN_NONE));
1048 irq = ksocknal_lib_sock_irq (sock);
1050 LIBCFS_ALLOC(conn, sizeof(*conn));
1056 memset (conn, 0, sizeof (*conn));
1058 conn->ksnc_peer = NULL;
1059 conn->ksnc_route = NULL;
1060 conn->ksnc_sock = sock;
1061 /* 2 ref, 1 for conn, another extra ref prevents socket
1062 * being closed before establishment of connection */
1063 cfs_atomic_set (&conn->ksnc_sock_refcount, 2);
1064 conn->ksnc_type = type;
1065 ksocknal_lib_save_callback(sock, conn);
1066 cfs_atomic_set (&conn->ksnc_conn_refcount, 1); /* 1 ref for me */
1068 conn->ksnc_rx_ready = 0;
1069 conn->ksnc_rx_scheduled = 0;
1071 CFS_INIT_LIST_HEAD (&conn->ksnc_tx_queue);
1072 conn->ksnc_tx_ready = 0;
1073 conn->ksnc_tx_scheduled = 0;
1074 conn->ksnc_tx_carrier = NULL;
1075 cfs_atomic_set (&conn->ksnc_tx_nob, 0);
1077 LIBCFS_ALLOC(hello, offsetof(ksock_hello_msg_t,
1078 kshm_ips[LNET_MAX_INTERFACES]));
1079 if (hello == NULL) {
1084 /* stash conn's local and remote addrs */
1085 rc = ksocknal_lib_get_conn_addrs (conn);
1089 /* Find out/confirm peer's NID and connection type and get the
1090 * vector of interfaces she's willing to let me connect to.
1091 * Passive connections use the listener timeout since the peer sends
1095 peer = route->ksnr_peer;
1096 LASSERT(ni == peer->ksnp_ni);
1098 /* Active connection sends HELLO eagerly */
1099 hello->kshm_nips = ksocknal_local_ipvec(ni, hello->kshm_ips);
1100 peerid = peer->ksnp_id;
1102 cfs_write_lock_bh(global_lock);
1103 conn->ksnc_proto = peer->ksnp_proto;
1104 cfs_write_unlock_bh(global_lock);
1106 if (conn->ksnc_proto == NULL) {
1107 conn->ksnc_proto = &ksocknal_protocol_v3x;
1108 #if SOCKNAL_VERSION_DEBUG
1109 if (*ksocknal_tunables.ksnd_protocol == 2)
1110 conn->ksnc_proto = &ksocknal_protocol_v2x;
1111 else if (*ksocknal_tunables.ksnd_protocol == 1)
1112 conn->ksnc_proto = &ksocknal_protocol_v1x;
1116 rc = ksocknal_send_hello (ni, conn, peerid.nid, hello);
1120 peerid.nid = LNET_NID_ANY;
1121 peerid.pid = LNET_PID_ANY;
1123 /* Passive, get protocol from peer */
1124 conn->ksnc_proto = NULL;
1127 rc = ksocknal_recv_hello (ni, conn, hello, &peerid, &incarnation);
1131 LASSERT (rc == 0 || active);
1132 LASSERT (conn->ksnc_proto != NULL);
1133 LASSERT (peerid.nid != LNET_NID_ANY);
1136 ksocknal_peer_addref(peer);
1137 cfs_write_lock_bh (global_lock);
1139 rc = ksocknal_create_peer(&peer, ni, peerid);
1143 cfs_write_lock_bh (global_lock);
1145 /* called with a ref on ni, so shutdown can't have started */
1146 LASSERT (((ksock_net_t *) ni->ni_data)->ksnn_shutdown == 0);
1148 peer2 = ksocknal_find_peer_locked(ni, peerid);
1149 if (peer2 == NULL) {
1150 /* NB this puts an "empty" peer in the peer
1151 * table (which takes my ref) */
1152 list_add_tail(&peer->ksnp_list,
1153 ksocknal_nid2peerlist(peerid.nid));
1155 ksocknal_peer_decref(peer);
1160 ksocknal_peer_addref(peer);
1161 peer->ksnp_accepting++;
1163 /* Am I already connecting to this guy? Resolve in
1164 * favour of higher NID... */
1165 if (peerid.nid < ni->ni_nid &&
1166 ksocknal_connecting(peer, conn->ksnc_ipaddr)) {
1168 warn = "connection race resolution";
1173 if (peer->ksnp_closing ||
1174 (active && route->ksnr_deleted)) {
1175 /* peer/route got closed under me */
1177 warn = "peer/route removed";
1181 if (peer->ksnp_proto == NULL) {
1182 /* Never connected before.
1183 * NB recv_hello may have returned EPROTO to signal my peer
1184 * wants a different protocol than the one I asked for.
1186 LASSERT (list_empty(&peer->ksnp_conns));
1188 peer->ksnp_proto = conn->ksnc_proto;
1189 peer->ksnp_incarnation = incarnation;
1192 if (peer->ksnp_proto != conn->ksnc_proto ||
1193 peer->ksnp_incarnation != incarnation) {
1194 /* Peer rebooted or I've got the wrong protocol version */
1195 ksocknal_close_peer_conns_locked(peer, 0, 0);
1197 peer->ksnp_proto = NULL;
1199 warn = peer->ksnp_incarnation != incarnation ?
1201 "wrong proto version";
1211 warn = "lost conn race";
1214 warn = "retry with different protocol version";
1218 /* Refuse to duplicate an existing connection, unless this is a
1219 * loopback connection */
1220 if (conn->ksnc_ipaddr != conn->ksnc_myipaddr) {
1221 list_for_each(tmp, &peer->ksnp_conns) {
1222 conn2 = list_entry(tmp, ksock_conn_t, ksnc_list);
1224 if (conn2->ksnc_ipaddr != conn->ksnc_ipaddr ||
1225 conn2->ksnc_myipaddr != conn->ksnc_myipaddr ||
1226 conn2->ksnc_type != conn->ksnc_type)
1229 /* Reply on a passive connection attempt so the peer
1230 * realises we're connected. */
1240 /* If the connection created by this route didn't bind to the IP
1241 * address the route connected to, the connection/route matching
1242 * code below probably isn't going to work. */
1244 route->ksnr_ipaddr != conn->ksnc_ipaddr) {
1245 CERROR("Route %s %u.%u.%u.%u connected to %u.%u.%u.%u\n",
1246 libcfs_id2str(peer->ksnp_id),
1247 HIPQUAD(route->ksnr_ipaddr),
1248 HIPQUAD(conn->ksnc_ipaddr));
1251 /* Search for a route corresponding to the new connection and
1252 * create an association. This allows incoming connections created
1253 * by routes in my peer to match my own route entries so I don't
1254 * continually create duplicate routes. */
1255 list_for_each (tmp, &peer->ksnp_routes) {
1256 route = list_entry(tmp, ksock_route_t, ksnr_list);
1258 if (route->ksnr_ipaddr != conn->ksnc_ipaddr)
1261 ksocknal_associate_route_conn_locked(route, conn);
1265 conn->ksnc_peer = peer; /* conn takes my ref on peer */
1266 peer->ksnp_last_alive = cfs_time_current();
1267 peer->ksnp_send_keepalive = 0;
1268 peer->ksnp_error = 0;
1270 sched = ksocknal_choose_scheduler_locked (irq);
1271 sched->kss_nconns++;
1272 conn->ksnc_scheduler = sched;
1274 conn->ksnc_tx_last_post = cfs_time_current();
1275 /* Set the deadline for the outgoing HELLO to drain */
1276 conn->ksnc_tx_bufnob = libcfs_sock_wmem_queued(sock);
1277 conn->ksnc_tx_deadline = cfs_time_shift(*ksocknal_tunables.ksnd_timeout);
1278 cfs_mb(); /* order with adding to peer's conn list */
1280 list_add (&conn->ksnc_list, &peer->ksnp_conns);
1281 ksocknal_conn_addref(conn);
1283 ksocknal_new_packet(conn, 0);
1285 conn->ksnc_zc_capable = ksocknal_lib_zc_capable(conn);
1287 /* Take packets blocking for this connection. */
1288 list_for_each_entry_safe(tx, txtmp, &peer->ksnp_tx_queue, tx_list) {
1289 if (conn->ksnc_proto->pro_match_tx(conn, tx, tx->tx_nonblk) == SOCKNAL_MATCH_NO)
1292 list_del (&tx->tx_list);
1293 ksocknal_queue_tx_locked (tx, conn);
1296 cfs_write_unlock_bh (global_lock);
1298 /* We've now got a new connection. Any errors from here on are just
1299 * like "normal" comms errors and we close the connection normally.
1300 * NB (a) we still have to send the reply HELLO for passive
1302 * (b) normal I/O on the conn is blocked until I setup and call the
1306 ksocknal_lib_bind_irq (irq);
1308 CDEBUG(D_NET, "New conn %s p %d.x %u.%u.%u.%u -> %u.%u.%u.%u/%d"
1309 " incarnation:"LPD64" sched[%d]/%d\n",
1310 libcfs_id2str(peerid), conn->ksnc_proto->pro_version,
1311 HIPQUAD(conn->ksnc_myipaddr), HIPQUAD(conn->ksnc_ipaddr),
1312 conn->ksnc_port, incarnation,
1313 (int)(conn->ksnc_scheduler - ksocknal_data.ksnd_schedulers), irq);
1316 /* additional routes after interface exchange? */
1317 ksocknal_create_routes(peer, conn->ksnc_port,
1318 hello->kshm_ips, hello->kshm_nips);
1320 hello->kshm_nips = ksocknal_select_ips(peer, hello->kshm_ips,
1322 rc = ksocknal_send_hello(ni, conn, peerid.nid, hello);
1325 LIBCFS_FREE(hello, offsetof(ksock_hello_msg_t,
1326 kshm_ips[LNET_MAX_INTERFACES]));
1328 /* setup the socket AFTER I've received hello (it disables
1329 * SO_LINGER). I might call back to the acceptor who may want
1330 * to send a protocol version response and then close the
1331 * socket; this ensures the socket only tears down after the
1332 * response has been sent. */
1334 rc = ksocknal_lib_setup_sock(sock);
1336 cfs_write_lock_bh(global_lock);
1338 /* NB my callbacks block while I hold ksnd_global_lock */
1339 ksocknal_lib_set_callback(sock, conn);
1342 peer->ksnp_accepting--;
1344 cfs_write_unlock_bh(global_lock);
1347 cfs_write_lock_bh(global_lock);
1348 if (!conn->ksnc_closing) {
1349 /* could be closed by another thread */
1350 ksocknal_close_conn_locked(conn, rc);
1352 cfs_write_unlock_bh(global_lock);
1353 } else if (ksocknal_connsock_addref(conn) == 0) {
1354 /* Allow I/O to proceed. */
1355 ksocknal_read_callback(conn);
1356 ksocknal_write_callback(conn);
1357 ksocknal_connsock_decref(conn);
1360 ksocknal_connsock_decref(conn);
1361 ksocknal_conn_decref(conn);
1365 if (!peer->ksnp_closing &&
1366 list_empty (&peer->ksnp_conns) &&
1367 list_empty (&peer->ksnp_routes)) {
1368 list_add(&zombies, &peer->ksnp_tx_queue);
1369 list_del_init(&peer->ksnp_tx_queue);
1370 ksocknal_unlink_peer_locked(peer);
1373 cfs_write_unlock_bh (global_lock);
1377 CERROR("Not creating conn %s type %d: %s\n",
1378 libcfs_id2str(peerid), conn->ksnc_type, warn);
1380 CDEBUG(D_NET, "Not creating conn %s type %d: %s\n",
1381 libcfs_id2str(peerid), conn->ksnc_type, warn);
1386 /* Request retry by replying with CONN_NONE
1387 * ksnc_proto has been set already */
1388 conn->ksnc_type = SOCKLND_CONN_NONE;
1389 hello->kshm_nips = 0;
1390 ksocknal_send_hello(ni, conn, peerid.nid, hello);
1393 cfs_write_lock_bh(global_lock);
1394 peer->ksnp_accepting--;
1395 cfs_write_unlock_bh(global_lock);
1398 ksocknal_txlist_done(ni, &zombies, 1);
1399 ksocknal_peer_decref(peer);
1403 LIBCFS_FREE(hello, offsetof(ksock_hello_msg_t,
1404 kshm_ips[LNET_MAX_INTERFACES]));
1406 LIBCFS_FREE (conn, sizeof(*conn));
1409 libcfs_sock_release(sock);
1414 ksocknal_close_conn_locked (ksock_conn_t *conn, int error)
1416 /* This just does the immmediate housekeeping, and queues the
1417 * connection for the reaper to terminate.
1418 * Caller holds ksnd_global_lock exclusively in irq context */
1419 ksock_peer_t *peer = conn->ksnc_peer;
1420 ksock_route_t *route;
1421 ksock_conn_t *conn2;
1422 struct list_head *tmp;
1424 LASSERT (peer->ksnp_error == 0);
1425 LASSERT (!conn->ksnc_closing);
1426 conn->ksnc_closing = 1;
1428 /* ksnd_deathrow_conns takes over peer's ref */
1429 list_del (&conn->ksnc_list);
1431 route = conn->ksnc_route;
1432 if (route != NULL) {
1433 /* dissociate conn from route... */
1434 LASSERT (!route->ksnr_deleted);
1435 LASSERT ((route->ksnr_connected & (1 << conn->ksnc_type)) != 0);
1438 list_for_each(tmp, &peer->ksnp_conns) {
1439 conn2 = list_entry(tmp, ksock_conn_t, ksnc_list);
1441 if (conn2->ksnc_route == route &&
1442 conn2->ksnc_type == conn->ksnc_type)
1448 route->ksnr_connected &= ~(1 << conn->ksnc_type);
1450 conn->ksnc_route = NULL;
1452 #if 0 /* irrelevent with only eager routes */
1453 list_del (&route->ksnr_list); /* make route least favourite */
1454 list_add_tail (&route->ksnr_list, &peer->ksnp_routes);
1456 ksocknal_route_decref(route); /* drop conn's ref on route */
1459 if (list_empty (&peer->ksnp_conns)) {
1460 /* No more connections to this peer */
1462 if (!list_empty(&peer->ksnp_tx_queue)) {
1465 LASSERT (conn->ksnc_proto == &ksocknal_protocol_v3x);
1467 /* throw them to the last connection...,
1468 * these TXs will be send to /dev/null by scheduler */
1469 list_for_each_entry(tx, &peer->ksnp_tx_queue, tx_list)
1470 ksocknal_tx_prep(conn, tx);
1472 spin_lock_bh(&conn->ksnc_scheduler->kss_lock);
1473 list_splice_init(&peer->ksnp_tx_queue, &conn->ksnc_tx_queue);
1474 spin_unlock_bh(&conn->ksnc_scheduler->kss_lock);
1477 peer->ksnp_proto = NULL; /* renegotiate protocol version */
1478 peer->ksnp_error = error; /* stash last conn close reason */
1480 if (list_empty (&peer->ksnp_routes)) {
1481 /* I've just closed last conn belonging to a
1482 * peer with no routes to it */
1483 ksocknal_unlink_peer_locked (peer);
1487 cfs_spin_lock_bh (&ksocknal_data.ksnd_reaper_lock);
1489 list_add_tail (&conn->ksnc_list, &ksocknal_data.ksnd_deathrow_conns);
1490 cfs_waitq_signal (&ksocknal_data.ksnd_reaper_waitq);
1492 cfs_spin_unlock_bh (&ksocknal_data.ksnd_reaper_lock);
1496 ksocknal_peer_failed (ksock_peer_t *peer)
1498 time_t last_alive = 0;
1501 /* There has been a connection failure or comms error; but I'll only
1502 * tell LNET I think the peer is dead if it's to another kernel and
1503 * there are no connections or connection attempts in existance. */
1505 cfs_read_lock (&ksocknal_data.ksnd_global_lock);
1507 if ((peer->ksnp_id.pid & LNET_PID_USERFLAG) == 0 &&
1508 list_empty(&peer->ksnp_conns) &&
1509 peer->ksnp_accepting == 0 &&
1510 ksocknal_find_connecting_route_locked(peer) == NULL) {
1512 last_alive = (time_t) (cfs_time_current_sec() -
1513 cfs_duration_sec(cfs_time_current() -
1514 peer->ksnp_last_alive));
1517 cfs_read_unlock (&ksocknal_data.ksnd_global_lock);
1520 lnet_notify (peer->ksnp_ni, peer->ksnp_id.nid, 0,
1525 ksocknal_finalize_zcreq(ksock_conn_t *conn)
1527 ksock_peer_t *peer = conn->ksnc_peer;
1530 CFS_LIST_HEAD (zlist);
1532 /* NB safe to finalize TXs because closing of socket will
1533 * abort all buffered data */
1534 LASSERT (conn->ksnc_sock == NULL);
1536 cfs_spin_lock(&peer->ksnp_lock);
1538 cfs_list_for_each_entry_safe_typed(tx, tmp, &peer->ksnp_zc_req_list,
1539 ksock_tx_t, tx_zc_list) {
1540 if (tx->tx_conn != conn)
1543 LASSERT (tx->tx_msg.ksm_zc_cookies[0] != 0);
1545 tx->tx_msg.ksm_zc_cookies[0] = 0;
1546 list_del(&tx->tx_zc_list);
1547 list_add(&tx->tx_zc_list, &zlist);
1550 cfs_spin_unlock(&peer->ksnp_lock);
1552 while (!list_empty(&zlist)) {
1553 tx = list_entry(zlist.next, ksock_tx_t, tx_zc_list);
1555 list_del(&tx->tx_zc_list);
1556 ksocknal_tx_decref(tx);
1561 ksocknal_terminate_conn (ksock_conn_t *conn)
1563 /* This gets called by the reaper (guaranteed thread context) to
1564 * disengage the socket from its callbacks and close it.
1565 * ksnc_refcount will eventually hit zero, and then the reaper will
1567 ksock_peer_t *peer = conn->ksnc_peer;
1568 ksock_sched_t *sched = conn->ksnc_scheduler;
1571 LASSERT(conn->ksnc_closing);
1573 /* wake up the scheduler to "send" all remaining packets to /dev/null */
1574 cfs_spin_lock_bh (&sched->kss_lock);
1576 /* a closing conn is always ready to tx */
1577 conn->ksnc_tx_ready = 1;
1579 if (!conn->ksnc_tx_scheduled &&
1580 !list_empty(&conn->ksnc_tx_queue)){
1581 list_add_tail (&conn->ksnc_tx_list,
1582 &sched->kss_tx_conns);
1583 conn->ksnc_tx_scheduled = 1;
1584 /* extra ref for scheduler */
1585 ksocknal_conn_addref(conn);
1587 cfs_waitq_signal (&sched->kss_waitq);
1590 cfs_spin_unlock_bh (&sched->kss_lock);
1592 /* serialise with callbacks */
1593 cfs_write_lock_bh (&ksocknal_data.ksnd_global_lock);
1595 ksocknal_lib_reset_callback(conn->ksnc_sock, conn);
1597 /* OK, so this conn may not be completely disengaged from its
1598 * scheduler yet, but it _has_ committed to terminate... */
1599 conn->ksnc_scheduler->kss_nconns--;
1601 if (peer->ksnp_error != 0) {
1602 /* peer's last conn closed in error */
1603 LASSERT (list_empty (&peer->ksnp_conns));
1605 peer->ksnp_error = 0; /* avoid multiple notifications */
1608 cfs_write_unlock_bh (&ksocknal_data.ksnd_global_lock);
1611 ksocknal_peer_failed(peer);
1613 /* The socket is closed on the final put; either here, or in
1614 * ksocknal_{send,recv}msg(). Since we set up the linger2 option
1615 * when the connection was established, this will close the socket
1616 * immediately, aborting anything buffered in it. Any hung
1617 * zero-copy transmits will therefore complete in finite time. */
1618 ksocknal_connsock_decref(conn);
1622 ksocknal_queue_zombie_conn (ksock_conn_t *conn)
1624 /* Queue the conn for the reaper to destroy */
1626 LASSERT (cfs_atomic_read(&conn->ksnc_conn_refcount) == 0);
1627 cfs_spin_lock_bh (&ksocknal_data.ksnd_reaper_lock);
1629 list_add_tail(&conn->ksnc_list, &ksocknal_data.ksnd_zombie_conns);
1630 cfs_waitq_signal(&ksocknal_data.ksnd_reaper_waitq);
1632 cfs_spin_unlock_bh (&ksocknal_data.ksnd_reaper_lock);
1636 ksocknal_destroy_conn (ksock_conn_t *conn)
1638 /* Final coup-de-grace of the reaper */
1639 CDEBUG (D_NET, "connection %p\n", conn);
1641 LASSERT (cfs_atomic_read (&conn->ksnc_conn_refcount) == 0);
1642 LASSERT (cfs_atomic_read (&conn->ksnc_sock_refcount) == 0);
1643 LASSERT (conn->ksnc_sock == NULL);
1644 LASSERT (conn->ksnc_route == NULL);
1645 LASSERT (!conn->ksnc_tx_scheduled);
1646 LASSERT (!conn->ksnc_rx_scheduled);
1647 LASSERT (list_empty(&conn->ksnc_tx_queue));
1649 /* complete current receive if any */
1650 switch (conn->ksnc_rx_state) {
1651 case SOCKNAL_RX_LNET_PAYLOAD:
1652 CERROR("Completing partial receive from %s"
1653 ", ip %d.%d.%d.%d:%d, with error\n",
1654 libcfs_id2str(conn->ksnc_peer->ksnp_id),
1655 HIPQUAD(conn->ksnc_ipaddr), conn->ksnc_port);
1656 lnet_finalize (conn->ksnc_peer->ksnp_ni,
1657 conn->ksnc_cookie, -EIO);
1659 case SOCKNAL_RX_LNET_HEADER:
1660 if (conn->ksnc_rx_started)
1661 CERROR("Incomplete receive of lnet header from %s"
1662 ", ip %d.%d.%d.%d:%d, with error, protocol: %d.x.\n",
1663 libcfs_id2str(conn->ksnc_peer->ksnp_id),
1664 HIPQUAD(conn->ksnc_ipaddr), conn->ksnc_port,
1665 conn->ksnc_proto->pro_version);
1667 case SOCKNAL_RX_KSM_HEADER:
1668 if (conn->ksnc_rx_started)
1669 CERROR("Incomplete receive of ksock message from %s"
1670 ", ip %d.%d.%d.%d:%d, with error, protocol: %d.x.\n",
1671 libcfs_id2str(conn->ksnc_peer->ksnp_id),
1672 HIPQUAD(conn->ksnc_ipaddr), conn->ksnc_port,
1673 conn->ksnc_proto->pro_version);
1675 case SOCKNAL_RX_SLOP:
1676 if (conn->ksnc_rx_started)
1677 CERROR("Incomplete receive of slops from %s"
1678 ", ip %d.%d.%d.%d:%d, with error\n",
1679 libcfs_id2str(conn->ksnc_peer->ksnp_id),
1680 HIPQUAD(conn->ksnc_ipaddr), conn->ksnc_port);
1687 ksocknal_peer_decref(conn->ksnc_peer);
1689 LIBCFS_FREE (conn, sizeof (*conn));
1693 ksocknal_close_peer_conns_locked (ksock_peer_t *peer, __u32 ipaddr, int why)
1696 struct list_head *ctmp;
1697 struct list_head *cnxt;
1700 list_for_each_safe (ctmp, cnxt, &peer->ksnp_conns) {
1701 conn = list_entry (ctmp, ksock_conn_t, ksnc_list);
1704 conn->ksnc_ipaddr == ipaddr) {
1706 ksocknal_close_conn_locked (conn, why);
1714 ksocknal_close_conn_and_siblings (ksock_conn_t *conn, int why)
1716 ksock_peer_t *peer = conn->ksnc_peer;
1717 __u32 ipaddr = conn->ksnc_ipaddr;
1720 cfs_write_lock_bh (&ksocknal_data.ksnd_global_lock);
1722 count = ksocknal_close_peer_conns_locked (peer, ipaddr, why);
1724 cfs_write_unlock_bh (&ksocknal_data.ksnd_global_lock);
1730 ksocknal_close_matching_conns (lnet_process_id_t id, __u32 ipaddr)
1733 struct list_head *ptmp;
1734 struct list_head *pnxt;
1740 cfs_write_lock_bh (&ksocknal_data.ksnd_global_lock);
1742 if (id.nid != LNET_NID_ANY)
1743 lo = hi = (int)(ksocknal_nid2peerlist(id.nid) - ksocknal_data.ksnd_peers);
1746 hi = ksocknal_data.ksnd_peer_hash_size - 1;
1749 for (i = lo; i <= hi; i++) {
1750 list_for_each_safe (ptmp, pnxt, &ksocknal_data.ksnd_peers[i]) {
1752 peer = list_entry (ptmp, ksock_peer_t, ksnp_list);
1754 if (!((id.nid == LNET_NID_ANY || id.nid == peer->ksnp_id.nid) &&
1755 (id.pid == LNET_PID_ANY || id.pid == peer->ksnp_id.pid)))
1758 count += ksocknal_close_peer_conns_locked (peer, ipaddr, 0);
1762 cfs_write_unlock_bh (&ksocknal_data.ksnd_global_lock);
1764 /* wildcards always succeed */
1765 if (id.nid == LNET_NID_ANY || id.pid == LNET_PID_ANY || ipaddr == 0)
1768 return (count == 0 ? -ENOENT : 0);
1772 ksocknal_notify (lnet_ni_t *ni, lnet_nid_t gw_nid, int alive)
1774 /* The router is telling me she's been notified of a change in
1775 * gateway state.... */
1776 lnet_process_id_t id = {0};
1779 id.pid = LNET_PID_ANY;
1781 CDEBUG (D_NET, "gw %s %s\n", libcfs_nid2str(gw_nid),
1782 alive ? "up" : "down");
1785 /* If the gateway crashed, close all open connections... */
1786 ksocknal_close_matching_conns (id, 0);
1790 /* ...otherwise do nothing. We can only establish new connections
1791 * if we have autroutes, and these connect on demand. */
1795 ksocknal_query (lnet_ni_t *ni, lnet_nid_t nid, time_t *when)
1798 cfs_time_t last_alive = 0;
1799 ksock_peer_t *peer = NULL;
1800 rwlock_t *glock = &ksocknal_data.ksnd_global_lock;
1801 lnet_process_id_t id = {.nid = nid, .pid = LUSTRE_SRV_LNET_PID};
1805 peer = ksocknal_find_peer_locked(ni, id);
1807 struct list_head *tmp;
1811 list_for_each (tmp, &peer->ksnp_conns) {
1812 conn = list_entry(tmp, ksock_conn_t, ksnc_list);
1813 bufnob = libcfs_sock_wmem_queued(conn->ksnc_sock);
1815 if (bufnob < conn->ksnc_tx_bufnob) {
1816 /* something got ACKed */
1817 conn->ksnc_tx_deadline =
1818 cfs_time_shift(*ksocknal_tunables.ksnd_timeout);
1819 peer->ksnp_last_alive = cfs_time_current();
1820 conn->ksnc_tx_bufnob = bufnob;
1824 last_alive = peer->ksnp_last_alive;
1825 if (ksocknal_find_connectable_route_locked(peer) == NULL)
1831 if (last_alive != 0)
1832 *when = cfs_time_current_sec() -
1833 cfs_duration_sec(cfs_time_current() - last_alive);
1838 ksocknal_add_peer(ni, id, LNET_NIDADDR(nid), lnet_acceptor_port());
1840 write_lock_bh(glock);
1842 peer = ksocknal_find_peer_locked(ni, id);
1844 ksocknal_launch_all_connections_locked(peer);
1846 write_unlock_bh(glock);
1851 ksocknal_push_peer (ksock_peer_t *peer)
1855 struct list_head *tmp;
1858 for (index = 0; ; index++) {
1859 cfs_read_lock (&ksocknal_data.ksnd_global_lock);
1864 list_for_each (tmp, &peer->ksnp_conns) {
1866 conn = list_entry (tmp, ksock_conn_t, ksnc_list);
1867 ksocknal_conn_addref(conn);
1872 cfs_read_unlock (&ksocknal_data.ksnd_global_lock);
1877 ksocknal_lib_push_conn (conn);
1878 ksocknal_conn_decref(conn);
1883 ksocknal_push (lnet_ni_t *ni, lnet_process_id_t id)
1886 struct list_head *tmp;
1892 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
1893 for (j = 0; ; j++) {
1894 cfs_read_lock (&ksocknal_data.ksnd_global_lock);
1899 list_for_each (tmp, &ksocknal_data.ksnd_peers[i]) {
1900 peer = list_entry(tmp, ksock_peer_t,
1903 if (!((id.nid == LNET_NID_ANY ||
1904 id.nid == peer->ksnp_id.nid) &&
1905 (id.pid == LNET_PID_ANY ||
1906 id.pid == peer->ksnp_id.pid))) {
1912 ksocknal_peer_addref(peer);
1917 cfs_read_unlock (&ksocknal_data.ksnd_global_lock);
1921 ksocknal_push_peer (peer);
1922 ksocknal_peer_decref(peer);
1932 ksocknal_add_interface(lnet_ni_t *ni, __u32 ipaddress, __u32 netmask)
1934 ksock_net_t *net = ni->ni_data;
1935 ksock_interface_t *iface;
1939 struct list_head *ptmp;
1941 struct list_head *rtmp;
1942 ksock_route_t *route;
1944 if (ipaddress == 0 ||
1948 cfs_write_lock_bh (&ksocknal_data.ksnd_global_lock);
1950 iface = ksocknal_ip2iface(ni, ipaddress);
1951 if (iface != NULL) {
1952 /* silently ignore dups */
1954 } else if (net->ksnn_ninterfaces == LNET_MAX_INTERFACES) {
1957 iface = &net->ksnn_interfaces[net->ksnn_ninterfaces++];
1959 iface->ksni_ipaddr = ipaddress;
1960 iface->ksni_netmask = netmask;
1961 iface->ksni_nroutes = 0;
1962 iface->ksni_npeers = 0;
1964 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
1965 list_for_each(ptmp, &ksocknal_data.ksnd_peers[i]) {
1966 peer = list_entry(ptmp, ksock_peer_t, ksnp_list);
1968 for (j = 0; j < peer->ksnp_n_passive_ips; j++)
1969 if (peer->ksnp_passive_ips[j] == ipaddress)
1970 iface->ksni_npeers++;
1972 list_for_each(rtmp, &peer->ksnp_routes) {
1973 route = list_entry(rtmp, ksock_route_t, ksnr_list);
1975 if (route->ksnr_myipaddr == ipaddress)
1976 iface->ksni_nroutes++;
1982 /* NB only new connections will pay attention to the new interface! */
1985 cfs_write_unlock_bh (&ksocknal_data.ksnd_global_lock);
1991 ksocknal_peer_del_interface_locked(ksock_peer_t *peer, __u32 ipaddr)
1993 struct list_head *tmp;
1994 struct list_head *nxt;
1995 ksock_route_t *route;
2000 for (i = 0; i < peer->ksnp_n_passive_ips; i++)
2001 if (peer->ksnp_passive_ips[i] == ipaddr) {
2002 for (j = i+1; j < peer->ksnp_n_passive_ips; j++)
2003 peer->ksnp_passive_ips[j-1] =
2004 peer->ksnp_passive_ips[j];
2005 peer->ksnp_n_passive_ips--;
2009 list_for_each_safe(tmp, nxt, &peer->ksnp_routes) {
2010 route = list_entry (tmp, ksock_route_t, ksnr_list);
2012 if (route->ksnr_myipaddr != ipaddr)
2015 if (route->ksnr_share_count != 0) {
2016 /* Manually created; keep, but unbind */
2017 route->ksnr_myipaddr = 0;
2019 ksocknal_del_route_locked(route);
2023 list_for_each_safe(tmp, nxt, &peer->ksnp_conns) {
2024 conn = list_entry(tmp, ksock_conn_t, ksnc_list);
2026 if (conn->ksnc_myipaddr == ipaddr)
2027 ksocknal_close_conn_locked (conn, 0);
2032 ksocknal_del_interface(lnet_ni_t *ni, __u32 ipaddress)
2034 ksock_net_t *net = ni->ni_data;
2036 struct list_head *tmp;
2037 struct list_head *nxt;
2043 cfs_write_lock_bh (&ksocknal_data.ksnd_global_lock);
2045 for (i = 0; i < net->ksnn_ninterfaces; i++) {
2046 this_ip = net->ksnn_interfaces[i].ksni_ipaddr;
2048 if (!(ipaddress == 0 ||
2049 ipaddress == this_ip))
2054 for (j = i+1; j < net->ksnn_ninterfaces; j++)
2055 net->ksnn_interfaces[j-1] =
2056 net->ksnn_interfaces[j];
2058 net->ksnn_ninterfaces--;
2060 for (j = 0; j < ksocknal_data.ksnd_peer_hash_size; j++) {
2061 list_for_each_safe(tmp, nxt, &ksocknal_data.ksnd_peers[j]) {
2062 peer = list_entry(tmp, ksock_peer_t, ksnp_list);
2064 if (peer->ksnp_ni != ni)
2067 ksocknal_peer_del_interface_locked(peer, this_ip);
2072 cfs_write_unlock_bh (&ksocknal_data.ksnd_global_lock);
2078 ksocknal_ctl(lnet_ni_t *ni, unsigned int cmd, void *arg)
2080 lnet_process_id_t id = {0};
2081 struct libcfs_ioctl_data *data = arg;
2085 case IOC_LIBCFS_GET_INTERFACE: {
2086 ksock_net_t *net = ni->ni_data;
2087 ksock_interface_t *iface;
2089 cfs_read_lock (&ksocknal_data.ksnd_global_lock);
2091 if (data->ioc_count >= (__u32)net->ksnn_ninterfaces) {
2095 iface = &net->ksnn_interfaces[data->ioc_count];
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;
2103 cfs_read_unlock (&ksocknal_data.ksnd_global_lock);
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 */
2112 case IOC_LIBCFS_DEL_INTERFACE:
2113 return ksocknal_del_interface(ni,
2114 data->ioc_u32[0]); /* IP address */
2116 case IOC_LIBCFS_GET_PEER: {
2121 int share_count = 0;
2123 rc = ksocknal_get_peer_info(ni, data->ioc_count,
2124 &id, &myip, &ip, &port,
2125 &conn_count, &share_count);
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;
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 */
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 */
2152 case IOC_LIBCFS_GET_CONN: {
2156 ksock_conn_t *conn = ksocknal_get_conn_by_idx (ni, data->ioc_count);
2161 ksocknal_lib_get_conn_tunables(conn, &txmem, &rxmem, &nagle);
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] = (__u32)(conn->ksnc_scheduler -
2171 ksocknal_data.ksnd_schedulers);
2172 data->ioc_u32[5] = rxmem;
2173 data->ioc_u32[6] = conn->ksnc_peer->ksnp_id.pid;
2174 ksocknal_conn_decref(conn);
2178 case IOC_LIBCFS_CLOSE_CONNECTION:
2179 id.nid = data->ioc_nid;
2180 id.pid = LNET_PID_ANY;
2181 return ksocknal_close_matching_conns (id,
2184 case IOC_LIBCFS_REGISTER_MYNID:
2185 /* Ignore if this is a noop */
2186 if (data->ioc_nid == ni->ni_nid)
2189 CERROR("obsolete IOC_LIBCFS_REGISTER_MYNID: %s(%s)\n",
2190 libcfs_nid2str(data->ioc_nid),
2191 libcfs_nid2str(ni->ni_nid));
2194 case IOC_LIBCFS_PUSH_CONNECTION:
2195 id.nid = data->ioc_nid;
2196 id.pid = LNET_PID_ANY;
2197 return ksocknal_push(ni, id);
2206 ksocknal_free_buffers (void)
2208 LASSERT (cfs_atomic_read(&ksocknal_data.ksnd_nactive_txs) == 0);
2210 if (ksocknal_data.ksnd_schedulers != NULL)
2211 LIBCFS_FREE (ksocknal_data.ksnd_schedulers,
2212 sizeof (ksock_sched_t) * ksocknal_data.ksnd_nschedulers);
2214 LIBCFS_FREE (ksocknal_data.ksnd_peers,
2215 sizeof (struct list_head) *
2216 ksocknal_data.ksnd_peer_hash_size);
2218 cfs_spin_lock(&ksocknal_data.ksnd_tx_lock);
2220 if (!list_empty(&ksocknal_data.ksnd_idle_noop_txs)) {
2221 struct list_head zlist;
2224 list_add(&zlist, &ksocknal_data.ksnd_idle_noop_txs);
2225 list_del_init(&ksocknal_data.ksnd_idle_noop_txs);
2226 cfs_spin_unlock(&ksocknal_data.ksnd_tx_lock);
2228 while(!list_empty(&zlist)) {
2229 tx = list_entry(zlist.next, ksock_tx_t, tx_list);
2230 list_del(&tx->tx_list);
2231 LIBCFS_FREE(tx, tx->tx_desc_size);
2234 cfs_spin_unlock(&ksocknal_data.ksnd_tx_lock);
2239 ksocknal_base_shutdown (void)
2241 ksock_sched_t *sched;
2244 CDEBUG(D_MALLOC, "before NAL cleanup: kmem %d\n",
2245 cfs_atomic_read (&libcfs_kmemory));
2246 LASSERT (ksocknal_data.ksnd_nnets == 0);
2248 switch (ksocknal_data.ksnd_init) {
2252 case SOCKNAL_INIT_ALL:
2253 case SOCKNAL_INIT_DATA:
2254 LASSERT (ksocknal_data.ksnd_peers != NULL);
2255 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
2256 LASSERT (list_empty (&ksocknal_data.ksnd_peers[i]));
2258 LASSERT (list_empty (&ksocknal_data.ksnd_enomem_conns));
2259 LASSERT (list_empty (&ksocknal_data.ksnd_zombie_conns));
2260 LASSERT (list_empty (&ksocknal_data.ksnd_connd_connreqs));
2261 LASSERT (list_empty (&ksocknal_data.ksnd_connd_routes));
2263 if (ksocknal_data.ksnd_schedulers != NULL)
2264 for (i = 0; i < ksocknal_data.ksnd_nschedulers; i++) {
2265 ksock_sched_t *kss =
2266 &ksocknal_data.ksnd_schedulers[i];
2268 LASSERT (list_empty (&kss->kss_tx_conns));
2269 LASSERT (list_empty (&kss->kss_rx_conns));
2270 LASSERT (list_empty (&kss->kss_zombie_noop_txs));
2271 LASSERT (kss->kss_nconns == 0);
2274 /* flag threads to terminate; wake and wait for them to die */
2275 ksocknal_data.ksnd_shuttingdown = 1;
2276 cfs_waitq_broadcast (&ksocknal_data.ksnd_connd_waitq);
2277 cfs_waitq_broadcast (&ksocknal_data.ksnd_reaper_waitq);
2279 if (ksocknal_data.ksnd_schedulers != NULL)
2280 for (i = 0; i < ksocknal_data.ksnd_nschedulers; i++) {
2281 sched = &ksocknal_data.ksnd_schedulers[i];
2282 cfs_waitq_broadcast(&sched->kss_waitq);
2286 cfs_read_lock (&ksocknal_data.ksnd_global_lock);
2287 while (ksocknal_data.ksnd_nthreads != 0) {
2289 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* power of 2? */
2290 "waiting for %d threads to terminate\n",
2291 ksocknal_data.ksnd_nthreads);
2292 cfs_read_unlock (&ksocknal_data.ksnd_global_lock);
2293 cfs_pause(cfs_time_seconds(1));
2294 cfs_read_lock (&ksocknal_data.ksnd_global_lock);
2296 cfs_read_unlock (&ksocknal_data.ksnd_global_lock);
2298 ksocknal_free_buffers();
2300 ksocknal_data.ksnd_init = SOCKNAL_INIT_NOTHING;
2304 CDEBUG(D_MALLOC, "after NAL cleanup: kmem %d\n",
2305 cfs_atomic_read (&libcfs_kmemory));
2307 PORTAL_MODULE_UNUSE;
2311 ksocknal_new_incarnation (void)
2315 /* The incarnation number is the time this module loaded and it
2316 * identifies this particular instance of the socknal. Hopefully
2317 * we won't be able to reboot more frequently than 1MHz for the
2318 * forseeable future :) */
2320 cfs_do_gettimeofday(&tv);
2322 return (((__u64)tv.tv_sec) * 1000000) + tv.tv_usec;
2326 ksocknal_base_startup (void)
2331 LASSERT (ksocknal_data.ksnd_init == SOCKNAL_INIT_NOTHING);
2332 LASSERT (ksocknal_data.ksnd_nnets == 0);
2334 memset (&ksocknal_data, 0, sizeof (ksocknal_data)); /* zero pointers */
2336 ksocknal_data.ksnd_peer_hash_size = SOCKNAL_PEER_HASH_SIZE;
2337 LIBCFS_ALLOC (ksocknal_data.ksnd_peers,
2338 sizeof (struct list_head) * ksocknal_data.ksnd_peer_hash_size);
2339 if (ksocknal_data.ksnd_peers == NULL)
2342 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++)
2343 CFS_INIT_LIST_HEAD(&ksocknal_data.ksnd_peers[i]);
2345 cfs_rwlock_init(&ksocknal_data.ksnd_global_lock);
2347 cfs_spin_lock_init (&ksocknal_data.ksnd_reaper_lock);
2348 CFS_INIT_LIST_HEAD (&ksocknal_data.ksnd_enomem_conns);
2349 CFS_INIT_LIST_HEAD (&ksocknal_data.ksnd_zombie_conns);
2350 CFS_INIT_LIST_HEAD (&ksocknal_data.ksnd_deathrow_conns);
2351 cfs_waitq_init(&ksocknal_data.ksnd_reaper_waitq);
2353 cfs_spin_lock_init (&ksocknal_data.ksnd_connd_lock);
2354 CFS_INIT_LIST_HEAD (&ksocknal_data.ksnd_connd_connreqs);
2355 CFS_INIT_LIST_HEAD (&ksocknal_data.ksnd_connd_routes);
2356 cfs_waitq_init(&ksocknal_data.ksnd_connd_waitq);
2358 cfs_spin_lock_init (&ksocknal_data.ksnd_tx_lock);
2359 CFS_INIT_LIST_HEAD (&ksocknal_data.ksnd_idle_noop_txs);
2361 /* NB memset above zeros whole of ksocknal_data, including
2362 * ksocknal_data.ksnd_irqinfo[all].ksni_valid */
2364 /* flag lists/ptrs/locks initialised */
2365 ksocknal_data.ksnd_init = SOCKNAL_INIT_DATA;
2368 ksocknal_data.ksnd_nschedulers = ksocknal_nsched();
2369 LIBCFS_ALLOC(ksocknal_data.ksnd_schedulers,
2370 sizeof(ksock_sched_t) * ksocknal_data.ksnd_nschedulers);
2371 if (ksocknal_data.ksnd_schedulers == NULL)
2374 for (i = 0; i < ksocknal_data.ksnd_nschedulers; i++) {
2375 ksock_sched_t *kss = &ksocknal_data.ksnd_schedulers[i];
2377 cfs_spin_lock_init (&kss->kss_lock);
2378 CFS_INIT_LIST_HEAD (&kss->kss_rx_conns);
2379 CFS_INIT_LIST_HEAD (&kss->kss_tx_conns);
2380 CFS_INIT_LIST_HEAD (&kss->kss_zombie_noop_txs);
2381 cfs_waitq_init (&kss->kss_waitq);
2384 for (i = 0; i < ksocknal_data.ksnd_nschedulers; i++) {
2385 rc = ksocknal_thread_start (ksocknal_scheduler,
2386 &ksocknal_data.ksnd_schedulers[i]);
2388 CERROR("Can't spawn socknal scheduler[%d]: %d\n",
2394 /* must have at least 2 connds to remain responsive to accepts while
2396 if (*ksocknal_tunables.ksnd_nconnds < 2)
2397 *ksocknal_tunables.ksnd_nconnds = 2;
2399 for (i = 0; i < *ksocknal_tunables.ksnd_nconnds; i++) {
2400 rc = ksocknal_thread_start (ksocknal_connd,
2401 (void *)((ulong_ptr_t)i));
2403 CERROR("Can't spawn socknal connd: %d\n", rc);
2408 rc = ksocknal_thread_start (ksocknal_reaper, NULL);
2410 CERROR ("Can't spawn socknal reaper: %d\n", rc);
2414 /* flag everything initialised */
2415 ksocknal_data.ksnd_init = SOCKNAL_INIT_ALL;
2420 ksocknal_base_shutdown();
2425 ksocknal_debug_peerhash (lnet_ni_t *ni)
2427 ksock_peer_t *peer = NULL;
2428 struct list_head *tmp;
2431 cfs_read_lock (&ksocknal_data.ksnd_global_lock);
2433 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
2434 list_for_each (tmp, &ksocknal_data.ksnd_peers[i]) {
2435 peer = list_entry (tmp, ksock_peer_t, ksnp_list);
2437 if (peer->ksnp_ni == ni) break;
2444 ksock_route_t *route;
2447 CWARN ("Active peer on shutdown: %s, ref %d, scnt %d, "
2448 "closing %d, accepting %d, err %d, zcookie "LPU64", "
2449 "txq %d, zc_req %d\n", libcfs_id2str(peer->ksnp_id),
2450 cfs_atomic_read(&peer->ksnp_refcount),
2451 peer->ksnp_sharecount, peer->ksnp_closing,
2452 peer->ksnp_accepting, peer->ksnp_error,
2453 peer->ksnp_zc_next_cookie,
2454 !list_empty(&peer->ksnp_tx_queue),
2455 !list_empty(&peer->ksnp_zc_req_list));
2457 list_for_each (tmp, &peer->ksnp_routes) {
2458 route = list_entry(tmp, ksock_route_t, ksnr_list);
2459 CWARN ("Route: ref %d, schd %d, conn %d, cnted %d, "
2460 "del %d\n", cfs_atomic_read(&route->ksnr_refcount),
2461 route->ksnr_scheduled, route->ksnr_connecting,
2462 route->ksnr_connected, route->ksnr_deleted);
2465 list_for_each (tmp, &peer->ksnp_conns) {
2466 conn = list_entry(tmp, ksock_conn_t, ksnc_list);
2467 CWARN ("Conn: ref %d, sref %d, t %d, c %d\n",
2468 cfs_atomic_read(&conn->ksnc_conn_refcount),
2469 cfs_atomic_read(&conn->ksnc_sock_refcount),
2470 conn->ksnc_type, conn->ksnc_closing);
2474 cfs_read_unlock (&ksocknal_data.ksnd_global_lock);
2479 ksocknal_shutdown (lnet_ni_t *ni)
2481 ksock_net_t *net = ni->ni_data;
2483 lnet_process_id_t anyid = {0};
2485 anyid.nid = LNET_NID_ANY;
2486 anyid.pid = LNET_PID_ANY;
2488 LASSERT(ksocknal_data.ksnd_init == SOCKNAL_INIT_ALL);
2489 LASSERT(ksocknal_data.ksnd_nnets > 0);
2491 cfs_spin_lock_bh (&net->ksnn_lock);
2492 net->ksnn_shutdown = 1; /* prevent new peers */
2493 cfs_spin_unlock_bh (&net->ksnn_lock);
2495 /* Delete all peers */
2496 ksocknal_del_peer(ni, anyid, 0);
2498 /* Wait for all peer state to clean up */
2500 cfs_spin_lock_bh (&net->ksnn_lock);
2501 while (net->ksnn_npeers != 0) {
2502 cfs_spin_unlock_bh (&net->ksnn_lock);
2505 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* power of 2? */
2506 "waiting for %d peers to disconnect\n",
2508 cfs_pause(cfs_time_seconds(1));
2510 ksocknal_debug_peerhash(ni);
2512 cfs_spin_lock_bh (&net->ksnn_lock);
2514 cfs_spin_unlock_bh (&net->ksnn_lock);
2516 for (i = 0; i < net->ksnn_ninterfaces; i++) {
2517 LASSERT (net->ksnn_interfaces[i].ksni_npeers == 0);
2518 LASSERT (net->ksnn_interfaces[i].ksni_nroutes == 0);
2521 LIBCFS_FREE(net, sizeof(*net));
2523 ksocknal_data.ksnd_nnets--;
2524 if (ksocknal_data.ksnd_nnets == 0)
2525 ksocknal_base_shutdown();
2529 ksocknal_enumerate_interfaces(ksock_net_t *net)
2537 n = libcfs_ipif_enumerate(&names);
2539 CERROR("Can't enumerate interfaces: %d\n", n);
2543 for (i = j = 0; i < n; i++) {
2548 if (!strcmp(names[i], "lo")) /* skip the loopback IF */
2551 rc = libcfs_ipif_query(names[i], &up, &ip, &mask);
2553 CWARN("Can't get interface %s info: %d\n",
2559 CWARN("Ignoring interface %s (down)\n",
2564 if (j == LNET_MAX_INTERFACES) {
2565 CWARN("Ignoring interface %s (too many interfaces)\n",
2570 net->ksnn_interfaces[j].ksni_ipaddr = ip;
2571 net->ksnn_interfaces[j].ksni_netmask = mask;
2575 libcfs_ipif_free_enumeration(names, n);
2578 CERROR("Can't find any usable interfaces\n");
2584 ksocknal_startup (lnet_ni_t *ni)
2590 LASSERT (ni->ni_lnd == &the_ksocklnd);
2592 if (ksocknal_data.ksnd_init == SOCKNAL_INIT_NOTHING) {
2593 rc = ksocknal_base_startup();
2598 LIBCFS_ALLOC(net, sizeof(*net));
2602 memset(net, 0, sizeof(*net));
2603 cfs_spin_lock_init(&net->ksnn_lock);
2604 net->ksnn_incarnation = ksocknal_new_incarnation();
2606 ni->ni_peertimeout = *ksocknal_tunables.ksnd_peertimeout;
2607 ni->ni_maxtxcredits = *ksocknal_tunables.ksnd_credits;
2608 ni->ni_peertxcredits = *ksocknal_tunables.ksnd_peertxcredits;
2609 ni->ni_peerrtrcredits = *ksocknal_tunables.ksnd_peerrtrcredits;
2611 if (ni->ni_interfaces[0] == NULL) {
2612 rc = ksocknal_enumerate_interfaces(net);
2616 net->ksnn_ninterfaces = 1;
2618 for (i = 0; i < LNET_MAX_INTERFACES; i++) {
2621 if (ni->ni_interfaces[i] == NULL)
2624 rc = libcfs_ipif_query(
2625 ni->ni_interfaces[i], &up,
2626 &net->ksnn_interfaces[i].ksni_ipaddr,
2627 &net->ksnn_interfaces[i].ksni_netmask);
2630 CERROR("Can't get interface %s info: %d\n",
2631 ni->ni_interfaces[i], rc);
2636 CERROR("Interface %s is down\n",
2637 ni->ni_interfaces[i]);
2641 net->ksnn_ninterfaces = i;
2644 ni->ni_nid = LNET_MKNID(LNET_NIDNET(ni->ni_nid),
2645 net->ksnn_interfaces[0].ksni_ipaddr);
2647 ksocknal_data.ksnd_nnets++;
2652 LIBCFS_FREE(net, sizeof(*net));
2654 if (ksocknal_data.ksnd_nnets == 0)
2655 ksocknal_base_shutdown();
2662 ksocknal_module_fini (void)
2664 lnet_unregister_lnd(&the_ksocklnd);
2665 ksocknal_tunables_fini();
2669 ksocknal_module_init (void)
2673 /* check ksnr_connected/connecting field large enough */
2674 CLASSERT (SOCKLND_CONN_NTYPES <= 4);
2675 CLASSERT (SOCKLND_CONN_ACK == SOCKLND_CONN_BULK_IN);
2677 /* initialize the_ksocklnd */
2678 the_ksocklnd.lnd_type = SOCKLND;
2679 the_ksocklnd.lnd_startup = ksocknal_startup;
2680 the_ksocklnd.lnd_shutdown = ksocknal_shutdown;
2681 the_ksocklnd.lnd_ctl = ksocknal_ctl;
2682 the_ksocklnd.lnd_send = ksocknal_send;
2683 the_ksocklnd.lnd_recv = ksocknal_recv;
2684 the_ksocklnd.lnd_notify = ksocknal_notify;
2685 the_ksocklnd.lnd_query = ksocknal_query;
2686 the_ksocklnd.lnd_accept = ksocknal_accept;
2688 rc = ksocknal_tunables_init();
2692 lnet_register_lnd(&the_ksocklnd);
2697 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
2698 MODULE_DESCRIPTION("Kernel TCP Socket LND v3.0.0");
2699 MODULE_LICENSE("GPL");
2701 cfs_module(ksocknal, "3.0.0", ksocknal_module_init, ksocknal_module_fini);