1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2001, 2002 Cluster File Systems, Inc.
5 * Author: Zach Brown <zab@zabbo.net>
6 * Author: Peter J. Braam <braam@clusterfs.com>
7 * Author: Phil Schwan <phil@clusterfs.com>
8 * Author: Eric Barton <eric@bartonsoftware.com>
10 * This file is part of Portals, http://www.sf.net/projects/sandiaportals/
12 * Portals is free software; you can redistribute it and/or
13 * modify it under the terms of version 2 of the GNU General Public
14 * License as published by the Free Software Foundation.
16 * Portals is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with Portals; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 ksock_nal_data_t ksocknal_data;
30 ptl_handle_ni_t ksocknal_ni;
31 ksock_tunables_t ksocknal_tunables;
33 kpr_nal_interface_t ksocknal_router_interface = {
35 kprni_arg: &ksocknal_data,
36 kprni_fwd: ksocknal_fwd_packet,
37 kprni_notify: ksocknal_notify,
41 #define SOCKNAL_SYSCTL 200
43 #define SOCKNAL_SYSCTL_TIMEOUT 1
44 #define SOCKNAL_SYSCTL_EAGER_ACK 2
45 #define SOCKNAL_SYSCTL_ZERO_COPY 3
46 #define SOCKNAL_SYSCTL_TYPED 4
47 #define SOCKNAL_SYSCTL_MIN_BULK 5
48 #define SOCKNAL_SYSCTL_BUFFER_SIZE 6
49 #define SOCKNAL_SYSCTL_NAGLE 7
50 #define SOCKNAL_SYSCTL_IRQ_AFFINITY 8
51 #define SOCKNAL_SYSCTL_KEEPALIVE_IDLE 9
52 #define SOCKNAL_SYSCTL_KEEPALIVE_COUNT 10
53 #define SOCKNAL_SYSCTL_KEEPALIVE_INTVL 11
55 static ctl_table ksocknal_ctl_table[] = {
56 {SOCKNAL_SYSCTL_TIMEOUT, "timeout",
57 &ksocknal_tunables.ksnd_io_timeout, sizeof (int),
58 0644, NULL, &proc_dointvec},
59 {SOCKNAL_SYSCTL_EAGER_ACK, "eager_ack",
60 &ksocknal_tunables.ksnd_eager_ack, sizeof (int),
61 0644, NULL, &proc_dointvec},
63 {SOCKNAL_SYSCTL_ZERO_COPY, "zero_copy",
64 &ksocknal_tunables.ksnd_zc_min_frag, sizeof (int),
65 0644, NULL, &proc_dointvec},
67 {SOCKNAL_SYSCTL_TYPED, "typed",
68 &ksocknal_tunables.ksnd_typed_conns, sizeof (int),
69 0644, NULL, &proc_dointvec},
70 {SOCKNAL_SYSCTL_MIN_BULK, "min_bulk",
71 &ksocknal_tunables.ksnd_min_bulk, sizeof (int),
72 0644, NULL, &proc_dointvec},
73 {SOCKNAL_SYSCTL_BUFFER_SIZE, "buffer_size",
74 &ksocknal_tunables.ksnd_buffer_size, sizeof(int),
75 0644, NULL, &proc_dointvec},
76 {SOCKNAL_SYSCTL_NAGLE, "nagle",
77 &ksocknal_tunables.ksnd_nagle, sizeof(int),
78 0644, NULL, &proc_dointvec},
80 {SOCKNAL_SYSCTL_IRQ_AFFINITY, "irq_affinity",
81 &ksocknal_tunables.ksnd_irq_affinity, sizeof(int),
82 0644, NULL, &proc_dointvec},
84 {SOCKNAL_SYSCTL_KEEPALIVE_IDLE, "keepalive_idle",
85 &ksocknal_tunables.ksnd_keepalive_idle, sizeof(int),
86 0644, NULL, &proc_dointvec},
87 {SOCKNAL_SYSCTL_KEEPALIVE_COUNT, "keepalive_count",
88 &ksocknal_tunables.ksnd_keepalive_count, sizeof(int),
89 0644, NULL, &proc_dointvec},
90 {SOCKNAL_SYSCTL_KEEPALIVE_INTVL, "keepalive_intvl",
91 &ksocknal_tunables.ksnd_keepalive_intvl, sizeof(int),
92 0644, NULL, &proc_dointvec},
96 static ctl_table ksocknal_top_ctl_table[] = {
97 {SOCKNAL_SYSCTL, "socknal", NULL, 0, 0555, ksocknal_ctl_table},
103 ksocknal_set_mynid(ptl_nid_t nid)
105 lib_ni_t *ni = &ksocknal_lib.libnal_ni;
107 /* FIXME: we have to do this because we call lib_init() at module
108 * insertion time, which is before we have 'mynid' available. lib_init
109 * sets the NAL's nid, which it uses to tell other nodes where packets
110 * are coming from. This is not a very graceful solution to this
113 CDEBUG(D_IOCTL, "setting mynid to "LPX64" (old nid="LPX64")\n",
114 nid, ni->ni_pid.nid);
116 ni->ni_pid.nid = nid;
121 ksocknal_bind_irq (unsigned int irq)
123 #if (defined(CONFIG_SMP) && CPU_AFFINITY)
128 ksock_irqinfo_t *info;
129 char *argv[] = {"/bin/sh",
133 char *envp[] = {"HOME=/",
134 "PATH=/sbin:/bin:/usr/sbin:/usr/bin",
137 LASSERT (irq < NR_IRQS);
138 if (irq == 0) /* software NIC or affinity disabled */
141 info = &ksocknal_data.ksnd_irqinfo[irq];
143 write_lock_irqsave (&ksocknal_data.ksnd_global_lock, flags);
145 LASSERT (info->ksni_valid);
146 bind = !info->ksni_bound;
147 info->ksni_bound = 1;
149 write_unlock_irqrestore (&ksocknal_data.ksnd_global_lock, flags);
151 if (!bind) /* bound already */
154 cpu = ksocknal_irqsched2cpu(info->ksni_sched);
155 snprintf (cmdline, sizeof (cmdline),
156 "echo %d > /proc/irq/%u/smp_affinity", 1 << cpu, irq);
158 printk (KERN_INFO "Lustre: Binding irq %u to CPU %d with cmd: %s\n",
161 /* FIXME: Find a better method of setting IRQ affinity...
164 USERMODEHELPER(argv[0], argv, envp);
169 ksocknal_ip2iface(__u32 ip)
172 ksock_interface_t *iface;
174 for (i = 0; i < ksocknal_data.ksnd_ninterfaces; i++) {
175 LASSERT(i < SOCKNAL_MAX_INTERFACES);
176 iface = &ksocknal_data.ksnd_interfaces[i];
178 if (iface->ksni_ipaddr == ip)
186 ksocknal_create_route (__u32 ipaddr, int port)
188 ksock_route_t *route;
190 PORTAL_ALLOC (route, sizeof (*route));
194 atomic_set (&route->ksnr_refcount, 1);
195 route->ksnr_peer = NULL;
196 route->ksnr_timeout = jiffies;
197 route->ksnr_retry_interval = SOCKNAL_MIN_RECONNECT_INTERVAL;
198 route->ksnr_ipaddr = ipaddr;
199 route->ksnr_port = port;
200 route->ksnr_connecting = 0;
201 route->ksnr_connected = 0;
202 route->ksnr_deleted = 0;
203 route->ksnr_conn_count = 0;
204 route->ksnr_share_count = 0;
210 ksocknal_destroy_route (ksock_route_t *route)
212 if (route->ksnr_peer != NULL)
213 ksocknal_put_peer (route->ksnr_peer);
215 PORTAL_FREE (route, sizeof (*route));
219 ksocknal_put_route (ksock_route_t *route)
221 CDEBUG (D_OTHER, "putting route[%p] (%d)\n",
222 route, atomic_read (&route->ksnr_refcount));
224 LASSERT (atomic_read (&route->ksnr_refcount) > 0);
225 if (!atomic_dec_and_test (&route->ksnr_refcount))
228 ksocknal_destroy_route (route);
232 ksocknal_create_peer (ptl_nid_t nid)
236 LASSERT (nid != PTL_NID_ANY);
238 PORTAL_ALLOC (peer, sizeof (*peer));
242 memset (peer, 0, sizeof (*peer)); /* NULL pointers/clear flags etc */
244 peer->ksnp_nid = nid;
245 atomic_set (&peer->ksnp_refcount, 1); /* 1 ref for caller */
246 peer->ksnp_closing = 0;
247 INIT_LIST_HEAD (&peer->ksnp_conns);
248 INIT_LIST_HEAD (&peer->ksnp_routes);
249 INIT_LIST_HEAD (&peer->ksnp_tx_queue);
251 atomic_inc (&ksocknal_data.ksnd_npeers);
256 ksocknal_destroy_peer (ksock_peer_t *peer)
258 CDEBUG (D_NET, "peer "LPX64" %p deleted\n", peer->ksnp_nid, peer);
260 LASSERT (atomic_read (&peer->ksnp_refcount) == 0);
261 LASSERT (list_empty (&peer->ksnp_conns));
262 LASSERT (list_empty (&peer->ksnp_routes));
263 LASSERT (list_empty (&peer->ksnp_tx_queue));
265 PORTAL_FREE (peer, sizeof (*peer));
267 /* NB a peer's connections and autoconnect routes keep a reference
268 * on their peer until they are destroyed, so we can be assured
269 * that _all_ state to do with this peer has been cleaned up when
270 * its refcount drops to zero. */
271 atomic_dec (&ksocknal_data.ksnd_npeers);
275 ksocknal_put_peer (ksock_peer_t *peer)
277 CDEBUG (D_OTHER, "putting peer[%p] -> "LPX64" (%d)\n",
278 peer, peer->ksnp_nid,
279 atomic_read (&peer->ksnp_refcount));
281 LASSERT (atomic_read (&peer->ksnp_refcount) > 0);
282 if (!atomic_dec_and_test (&peer->ksnp_refcount))
285 ksocknal_destroy_peer (peer);
289 ksocknal_find_peer_locked (ptl_nid_t nid)
291 struct list_head *peer_list = ksocknal_nid2peerlist (nid);
292 struct list_head *tmp;
295 list_for_each (tmp, peer_list) {
297 peer = list_entry (tmp, ksock_peer_t, ksnp_list);
299 LASSERT (!peer->ksnp_closing);
301 if (peer->ksnp_nid != nid)
304 CDEBUG(D_NET, "got peer [%p] -> "LPX64" (%d)\n",
305 peer, nid, atomic_read (&peer->ksnp_refcount));
312 ksocknal_get_peer (ptl_nid_t nid)
316 read_lock (&ksocknal_data.ksnd_global_lock);
317 peer = ksocknal_find_peer_locked (nid);
318 if (peer != NULL) /* +1 ref for caller? */
319 atomic_inc (&peer->ksnp_refcount);
320 read_unlock (&ksocknal_data.ksnd_global_lock);
326 ksocknal_unlink_peer_locked (ksock_peer_t *peer)
331 for (i = 0; i < peer->ksnp_n_passive_ips; i++) {
332 LASSERT (i < SOCKNAL_MAX_INTERFACES);
333 ip = peer->ksnp_passive_ips[i];
335 ksocknal_ip2iface(ip)->ksni_npeers--;
338 LASSERT (list_empty(&peer->ksnp_conns));
339 LASSERT (list_empty(&peer->ksnp_routes));
340 LASSERT (!peer->ksnp_closing);
341 peer->ksnp_closing = 1;
342 list_del (&peer->ksnp_list);
343 /* lose peerlist's ref */
344 ksocknal_put_peer (peer);
348 ksocknal_get_peer_info (int index, ptl_nid_t *nid,
349 __u32 *myip, __u32 *peer_ip, int *port,
350 int *conn_count, int *share_count)
353 struct list_head *ptmp;
354 ksock_route_t *route;
355 struct list_head *rtmp;
360 read_lock (&ksocknal_data.ksnd_global_lock);
362 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
364 list_for_each (ptmp, &ksocknal_data.ksnd_peers[i]) {
365 peer = list_entry (ptmp, ksock_peer_t, ksnp_list);
367 if (peer->ksnp_n_passive_ips == 0 &&
368 list_empty(&peer->ksnp_routes)) {
372 *nid = peer->ksnp_nid;
382 for (j = 0; j < peer->ksnp_n_passive_ips; j++) {
386 *nid = peer->ksnp_nid;
387 *myip = peer->ksnp_passive_ips[j];
396 list_for_each (rtmp, &peer->ksnp_routes) {
400 route = list_entry(rtmp, ksock_route_t,
403 *nid = peer->ksnp_nid;
404 *myip = route->ksnr_myipaddr;
405 *peer_ip = route->ksnr_ipaddr;
406 *port = route->ksnr_port;
407 *conn_count = route->ksnr_conn_count;
408 *share_count = route->ksnr_share_count;
415 read_unlock (&ksocknal_data.ksnd_global_lock);
420 ksocknal_associate_route_conn_locked(ksock_route_t *route, ksock_conn_t *conn)
422 ksock_peer_t *peer = route->ksnr_peer;
423 int type = conn->ksnc_type;
424 ksock_interface_t *iface;
426 conn->ksnc_route = route;
427 atomic_inc (&route->ksnr_refcount);
429 if (route->ksnr_myipaddr != conn->ksnc_myipaddr) {
430 if (route->ksnr_myipaddr == 0) {
431 /* route wasn't bound locally yet (the initial route) */
432 CWARN("Binding "LPX64" %u.%u.%u.%u to %u.%u.%u.%u\n",
434 HIPQUAD(route->ksnr_ipaddr),
435 HIPQUAD(conn->ksnc_myipaddr));
437 CWARN("Rebinding "LPX64" %u.%u.%u.%u from "
438 "%u.%u.%u.%u to %u.%u.%u.%u\n",
440 HIPQUAD(route->ksnr_ipaddr),
441 HIPQUAD(route->ksnr_myipaddr),
442 HIPQUAD(conn->ksnc_myipaddr));
444 iface = ksocknal_ip2iface(route->ksnr_myipaddr);
446 iface->ksni_nroutes--;
448 route->ksnr_myipaddr = conn->ksnc_myipaddr;
449 iface = ksocknal_ip2iface(route->ksnr_myipaddr);
451 iface->ksni_nroutes++;
454 route->ksnr_connected |= (1<<type);
455 route->ksnr_connecting &= ~(1<<type);
456 route->ksnr_conn_count++;
458 /* Successful connection => further attempts can
459 * proceed immediately */
460 route->ksnr_timeout = jiffies;
461 route->ksnr_retry_interval = SOCKNAL_MIN_RECONNECT_INTERVAL;
465 ksocknal_add_route_locked (ksock_peer_t *peer, ksock_route_t *route)
467 struct list_head *tmp;
470 ksock_route_t *route2;
472 LASSERT (route->ksnr_peer == NULL);
473 LASSERT (route->ksnr_connecting == 0);
474 LASSERT (route->ksnr_connected == 0);
476 /* LASSERT(unique) */
477 list_for_each(tmp, &peer->ksnp_routes) {
478 route2 = list_entry(tmp, ksock_route_t, ksnr_list);
480 if (route2->ksnr_ipaddr == route->ksnr_ipaddr) {
481 CERROR ("Duplicate route "LPX64" %u.%u.%u.%u\n",
482 peer->ksnp_nid, HIPQUAD(route->ksnr_ipaddr));
487 route->ksnr_peer = peer;
488 atomic_inc (&peer->ksnp_refcount);
489 /* peer's routelist takes over my ref on 'route' */
490 list_add_tail(&route->ksnr_list, &peer->ksnp_routes);
492 list_for_each(tmp, &peer->ksnp_conns) {
493 conn = list_entry(tmp, ksock_conn_t, ksnc_list);
494 type = conn->ksnc_type;
496 if (conn->ksnc_ipaddr != route->ksnr_ipaddr)
499 ksocknal_associate_route_conn_locked(route, conn);
500 /* keep going (typed routes) */
505 ksocknal_del_route_locked (ksock_route_t *route)
507 ksock_peer_t *peer = route->ksnr_peer;
508 ksock_interface_t *iface;
510 struct list_head *ctmp;
511 struct list_head *cnxt;
513 LASSERT (!route->ksnr_deleted);
515 /* Close associated conns */
516 list_for_each_safe (ctmp, cnxt, &peer->ksnp_conns) {
517 conn = list_entry(ctmp, ksock_conn_t, ksnc_list);
519 if (conn->ksnc_route != route)
522 ksocknal_close_conn_locked (conn, 0);
525 if (route->ksnr_myipaddr != 0) {
526 iface = ksocknal_ip2iface(route->ksnr_myipaddr);
528 iface->ksni_nroutes--;
531 route->ksnr_deleted = 1;
532 list_del (&route->ksnr_list);
533 ksocknal_put_route (route); /* drop peer's ref */
535 if (list_empty (&peer->ksnp_routes) &&
536 list_empty (&peer->ksnp_conns)) {
537 /* I've just removed the last autoconnect route of a peer
538 * with no active connections */
539 ksocknal_unlink_peer_locked (peer);
544 ksocknal_add_peer (ptl_nid_t nid, __u32 ipaddr, int port)
547 struct list_head *tmp;
550 ksock_route_t *route;
551 ksock_route_t *route2;
553 if (nid == PTL_NID_ANY)
556 /* Have a brand new peer ready... */
557 peer = ksocknal_create_peer (nid);
561 route = ksocknal_create_route (ipaddr, port);
563 ksocknal_put_peer (peer);
567 write_lock_irqsave (&ksocknal_data.ksnd_global_lock, flags);
569 peer2 = ksocknal_find_peer_locked (nid);
571 ksocknal_put_peer (peer);
574 /* peer table takes my ref on peer */
575 list_add_tail (&peer->ksnp_list,
576 ksocknal_nid2peerlist (nid));
580 list_for_each (tmp, &peer->ksnp_routes) {
581 route2 = list_entry(tmp, ksock_route_t, ksnr_list);
583 if (route2->ksnr_ipaddr == ipaddr)
588 if (route2 == NULL) {
589 ksocknal_add_route_locked(peer, route);
590 route->ksnr_share_count++;
592 ksocknal_put_route(route);
593 route2->ksnr_share_count++;
596 write_unlock_irqrestore (&ksocknal_data.ksnd_global_lock, flags);
602 ksocknal_del_peer_locked (ksock_peer_t *peer, __u32 ip, int single_share)
605 ksock_route_t *route;
606 struct list_head *tmp;
607 struct list_head *nxt;
610 LASSERT (!peer->ksnp_closing);
612 list_for_each_safe (tmp, nxt, &peer->ksnp_routes) {
613 route = list_entry(tmp, ksock_route_t, ksnr_list);
615 if (single_share && route->ksnr_share_count == 0)
619 if (!(ip == 0 || route->ksnr_ipaddr == ip))
623 route->ksnr_share_count = 0;
624 else if (route->ksnr_share_count > 0)
625 route->ksnr_share_count--;
627 if (route->ksnr_share_count == 0) {
628 /* This deletes associated conns too */
629 ksocknal_del_route_locked (route);
637 list_for_each_safe (tmp, nxt, &peer->ksnp_routes) {
638 route = list_entry(tmp, ksock_route_t, ksnr_list);
639 nshared += route->ksnr_share_count;
643 /* remove everything else if there are no explicit entries
646 list_for_each_safe (tmp, nxt, &peer->ksnp_routes) {
647 route = list_entry(tmp, ksock_route_t, ksnr_list);
649 /* we should only be removing auto-entries */
650 LASSERT(route->ksnr_share_count == 0);
651 ksocknal_del_route_locked (route);
654 list_for_each_safe (tmp, nxt, &peer->ksnp_conns) {
655 conn = list_entry(tmp, ksock_conn_t, ksnc_list);
657 ksocknal_close_conn_locked(conn, 0);
661 /* NB peer unlinks itself when last conn/route is removed */
665 ksocknal_del_peer (ptl_nid_t nid, __u32 ip, int single_share)
668 struct list_head *ptmp;
669 struct list_head *pnxt;
676 write_lock_irqsave (&ksocknal_data.ksnd_global_lock, flags);
678 if (nid != PTL_NID_ANY)
679 lo = hi = ksocknal_nid2peerlist(nid) - ksocknal_data.ksnd_peers;
682 hi = ksocknal_data.ksnd_peer_hash_size - 1;
685 for (i = lo; i <= hi; i++) {
686 list_for_each_safe (ptmp, pnxt, &ksocknal_data.ksnd_peers[i]) {
687 peer = list_entry (ptmp, ksock_peer_t, ksnp_list);
689 if (!(nid == PTL_NID_ANY || peer->ksnp_nid == nid))
692 ksocknal_del_peer_locked (peer, ip, single_share);
693 rc = 0; /* matched! */
700 write_unlock_irqrestore (&ksocknal_data.ksnd_global_lock, flags);
706 ksocknal_get_conn_by_idx (int index)
709 struct list_head *ptmp;
711 struct list_head *ctmp;
714 read_lock (&ksocknal_data.ksnd_global_lock);
716 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
717 list_for_each (ptmp, &ksocknal_data.ksnd_peers[i]) {
718 peer = list_entry (ptmp, ksock_peer_t, ksnp_list);
720 LASSERT (!peer->ksnp_closing);
722 list_for_each (ctmp, &peer->ksnp_conns) {
726 conn = list_entry (ctmp, ksock_conn_t, ksnc_list);
727 atomic_inc (&conn->ksnc_refcount);
728 read_unlock (&ksocknal_data.ksnd_global_lock);
734 read_unlock (&ksocknal_data.ksnd_global_lock);
739 ksocknal_get_conn_addrs (ksock_conn_t *conn)
741 struct sockaddr_in sin;
742 int len = sizeof (sin);
745 rc = conn->ksnc_sock->ops->getname (conn->ksnc_sock,
746 (struct sockaddr *)&sin, &len, 2);
747 /* Didn't need the {get,put}connsock dance to deref ksnc_sock... */
748 LASSERT (!conn->ksnc_closing);
751 CERROR ("Error %d getting sock peer IP\n", rc);
755 conn->ksnc_ipaddr = ntohl (sin.sin_addr.s_addr);
756 conn->ksnc_port = ntohs (sin.sin_port);
758 rc = conn->ksnc_sock->ops->getname (conn->ksnc_sock,
759 (struct sockaddr *)&sin, &len, 0);
761 CERROR ("Error %d getting sock local IP\n", rc);
765 conn->ksnc_myipaddr = ntohl (sin.sin_addr.s_addr);
771 ksocknal_sock_irq (struct socket *sock)
774 struct dst_entry *dst;
776 if (!ksocknal_tunables.ksnd_irq_affinity)
779 dst = sk_dst_get (sock->sk);
781 if (dst->dev != NULL) {
783 if (irq >= NR_IRQS) {
784 CERROR ("Unexpected IRQ %x\n", irq);
795 ksocknal_choose_scheduler_locked (unsigned int irq)
797 ksock_sched_t *sched;
798 ksock_irqinfo_t *info;
801 LASSERT (irq < NR_IRQS);
802 info = &ksocknal_data.ksnd_irqinfo[irq];
804 if (irq != 0 && /* hardware NIC */
805 info->ksni_valid) { /* already set up */
806 return (&ksocknal_data.ksnd_schedulers[info->ksni_sched]);
809 /* software NIC (irq == 0) || not associated with a scheduler yet.
810 * Choose the CPU with the fewest connections... */
811 sched = &ksocknal_data.ksnd_schedulers[0];
812 for (i = 1; i < ksocknal_data.ksnd_nschedulers; i++)
813 if (sched->kss_nconns >
814 ksocknal_data.ksnd_schedulers[i].kss_nconns)
815 sched = &ksocknal_data.ksnd_schedulers[i];
817 if (irq != 0) { /* Hardware NIC */
818 info->ksni_valid = 1;
819 info->ksni_sched = sched - ksocknal_data.ksnd_schedulers;
822 LASSERT (info->ksni_sched == sched - ksocknal_data.ksnd_schedulers);
829 ksocknal_local_ipvec (__u32 *ipaddrs)
834 read_lock (&ksocknal_data.ksnd_global_lock);
836 nip = ksocknal_data.ksnd_ninterfaces;
837 for (i = 0; i < nip; i++) {
838 LASSERT (i < SOCKNAL_MAX_INTERFACES);
840 ipaddrs[i] = ksocknal_data.ksnd_interfaces[i].ksni_ipaddr;
841 LASSERT (ipaddrs[i] != 0);
844 read_unlock (&ksocknal_data.ksnd_global_lock);
849 ksocknal_match_peerip (ksock_interface_t *iface, __u32 *ips, int nips)
851 int best_netmatch = 0;
858 for (i = 0; i < nips; i++) {
862 this_xor = (ips[i] ^ iface->ksni_ipaddr);
863 this_netmatch = ((this_xor & iface->ksni_netmask) == 0) ? 1 : 0;
866 best_netmatch < this_netmatch ||
867 (best_netmatch == this_netmatch &&
868 best_xor > this_xor)))
872 best_netmatch = this_netmatch;
881 ksocknal_select_ips(ksock_peer_t *peer, __u32 *peerips, int n_peerips)
883 rwlock_t *global_lock = &ksocknal_data.ksnd_global_lock;
885 ksock_interface_t *iface;
886 ksock_interface_t *best_iface;
897 /* CAVEAT EMPTOR: We do all our interface matching with an
898 * exclusive hold of global lock at IRQ priority. We're only
899 * expecting to be dealing with small numbers of interfaces, so the
900 * O(n**3)-ness shouldn't matter */
902 /* Also note that I'm not going to return more than n_peerips
903 * interfaces, even if I have more myself */
905 write_lock_irqsave(global_lock, flags);
907 LASSERT (n_peerips <= SOCKNAL_MAX_INTERFACES);
908 LASSERT (ksocknal_data.ksnd_ninterfaces <= SOCKNAL_MAX_INTERFACES);
910 n_ips = MIN(n_peerips, ksocknal_data.ksnd_ninterfaces);
912 for (i = 0; peer->ksnp_n_passive_ips < n_ips; i++) {
913 /* ^ yes really... */
915 /* If we have any new interfaces, first tick off all the
916 * peer IPs that match old interfaces, then choose new
917 * interfaces to match the remaining peer IPS.
918 * We don't forget interfaces we've stopped using; we might
919 * start using them again... */
921 if (i < peer->ksnp_n_passive_ips) {
923 ip = peer->ksnp_passive_ips[i];
924 best_iface = ksocknal_ip2iface(ip);
926 /* peer passive ips are kept up to date */
927 LASSERT(best_iface != NULL);
929 /* choose a new interface */
930 LASSERT (i == peer->ksnp_n_passive_ips);
936 for (j = 0; j < ksocknal_data.ksnd_ninterfaces; j++) {
937 iface = &ksocknal_data.ksnd_interfaces[j];
938 ip = iface->ksni_ipaddr;
940 for (k = 0; k < peer->ksnp_n_passive_ips; k++)
941 if (peer->ksnp_passive_ips[k] == ip)
944 if (k < peer->ksnp_n_passive_ips) /* using it already */
947 k = ksocknal_match_peerip(iface, peerips, n_peerips);
948 xor = (ip ^ peerips[k]);
949 this_netmatch = ((xor & iface->ksni_netmask) == 0) ? 1 : 0;
951 if (!(best_iface == NULL ||
952 best_netmatch < this_netmatch ||
953 (best_netmatch == this_netmatch &&
954 best_npeers > iface->ksni_npeers)))
958 best_netmatch = this_netmatch;
959 best_npeers = iface->ksni_npeers;
962 best_iface->ksni_npeers++;
963 ip = best_iface->ksni_ipaddr;
964 peer->ksnp_passive_ips[i] = ip;
965 peer->ksnp_n_passive_ips = i+1;
968 LASSERT (best_iface != NULL);
970 /* mark the best matching peer IP used */
971 j = ksocknal_match_peerip(best_iface, peerips, n_peerips);
975 /* Overwrite input peer IP addresses */
976 memcpy(peerips, peer->ksnp_passive_ips, n_ips * sizeof(*peerips));
978 write_unlock_irqrestore(global_lock, flags);
984 ksocknal_create_routes(ksock_peer_t *peer, int port,
985 __u32 *peer_ipaddrs, int npeer_ipaddrs)
987 ksock_route_t *newroute = NULL;
988 rwlock_t *global_lock = &ksocknal_data.ksnd_global_lock;
990 struct list_head *rtmp;
991 ksock_route_t *route;
992 ksock_interface_t *iface;
993 ksock_interface_t *best_iface;
1000 /* CAVEAT EMPTOR: We do all our interface matching with an
1001 * exclusive hold of global lock at IRQ priority. We're only
1002 * expecting to be dealing with small numbers of interfaces, so the
1003 * O(n**3)-ness here shouldn't matter */
1005 write_lock_irqsave(global_lock, flags);
1007 LASSERT (npeer_ipaddrs <= SOCKNAL_MAX_INTERFACES);
1009 for (i = 0; i < npeer_ipaddrs; i++) {
1010 if (newroute != NULL) {
1011 newroute->ksnr_ipaddr = peer_ipaddrs[i];
1013 write_unlock_irqrestore(global_lock, flags);
1015 newroute = ksocknal_create_route(peer_ipaddrs[i], port);
1016 if (newroute == NULL)
1019 write_lock_irqsave(global_lock, flags);
1022 /* Already got a route? */
1024 list_for_each(rtmp, &peer->ksnp_routes) {
1025 route = list_entry(rtmp, ksock_route_t, ksnr_list);
1027 if (route->ksnr_ipaddr == newroute->ksnr_ipaddr)
1039 LASSERT (ksocknal_data.ksnd_ninterfaces <= SOCKNAL_MAX_INTERFACES);
1041 /* Select interface to connect from */
1042 for (j = 0; j < ksocknal_data.ksnd_ninterfaces; j++) {
1043 iface = &ksocknal_data.ksnd_interfaces[j];
1045 /* Using this interface already? */
1046 list_for_each(rtmp, &peer->ksnp_routes) {
1047 route = list_entry(rtmp, ksock_route_t, ksnr_list);
1049 if (route->ksnr_myipaddr == iface->ksni_ipaddr)
1057 this_netmatch = (((iface->ksni_ipaddr ^
1058 newroute->ksnr_ipaddr) &
1059 iface->ksni_netmask) == 0) ? 1 : 0;
1061 if (!(best_iface == NULL ||
1062 best_netmatch < this_netmatch ||
1063 (best_netmatch == this_netmatch &&
1064 best_nroutes > iface->ksni_nroutes)))
1068 best_netmatch = this_netmatch;
1069 best_nroutes = iface->ksni_nroutes;
1072 if (best_iface == NULL)
1075 newroute->ksnr_myipaddr = best_iface->ksni_ipaddr;
1076 best_iface->ksni_nroutes++;
1078 ksocknal_add_route_locked(peer, newroute);
1082 write_unlock_irqrestore(global_lock, flags);
1083 if (newroute != NULL)
1084 ksocknal_put_route(newroute);
1088 ksocknal_create_conn (ksock_route_t *route, struct socket *sock, int type)
1090 int passive = (type == SOCKNAL_CONN_NONE);
1091 rwlock_t *global_lock = &ksocknal_data.ksnd_global_lock;
1092 __u32 ipaddrs[SOCKNAL_MAX_INTERFACES];
1095 struct list_head *tmp;
1097 unsigned long flags;
1099 ksock_conn_t *conn2;
1100 ksock_peer_t *peer = NULL;
1101 ksock_peer_t *peer2;
1102 ksock_sched_t *sched;
1107 /* NB, sock has an associated file since (a) this connection might
1108 * have been created in userland and (b) we need to refcount the
1109 * socket so that we don't close it while I/O is being done on
1110 * it, and sock->file has that pre-cooked... */
1111 LASSERT (sock->file != NULL);
1112 LASSERT (file_count(sock->file) > 0);
1113 LASSERT (route == NULL || !passive);
1115 rc = ksocknal_setup_sock (sock);
1119 irq = ksocknal_sock_irq (sock);
1121 PORTAL_ALLOC(conn, sizeof(*conn));
1125 memset (conn, 0, sizeof (*conn));
1126 conn->ksnc_peer = NULL;
1127 conn->ksnc_route = NULL;
1128 conn->ksnc_sock = sock;
1129 conn->ksnc_type = type;
1130 conn->ksnc_saved_data_ready = sock->sk->sk_data_ready;
1131 conn->ksnc_saved_write_space = sock->sk->sk_write_space;
1132 atomic_set (&conn->ksnc_refcount, 1); /* 1 ref for me */
1134 conn->ksnc_rx_ready = 0;
1135 conn->ksnc_rx_scheduled = 0;
1136 ksocknal_new_packet (conn, 0);
1138 INIT_LIST_HEAD (&conn->ksnc_tx_queue);
1139 conn->ksnc_tx_ready = 0;
1140 conn->ksnc_tx_scheduled = 0;
1141 atomic_set (&conn->ksnc_tx_nob, 0);
1143 /* stash conn's local and remote addrs */
1144 rc = ksocknal_get_conn_addrs (conn);
1149 /* Active connection sends HELLO eagerly */
1150 rc = ksocknal_local_ipvec(ipaddrs);
1155 rc = ksocknal_send_hello (conn, ipaddrs, nipaddrs);
1160 /* Find out/confirm peer's NID and connection type and get the
1161 * vector of interfaces she's willing to let me connect to */
1162 nid = (route == NULL) ? PTL_NID_ANY : route->ksnr_peer->ksnp_nid;
1163 rc = ksocknal_recv_hello (conn, &nid, &incarnation, ipaddrs);
1167 LASSERT (nid != PTL_NID_ANY);
1169 if (route != NULL) {
1170 peer = route->ksnr_peer;
1171 atomic_inc(&peer->ksnp_refcount);
1173 peer = ksocknal_create_peer(nid);
1179 write_lock_irqsave(global_lock, flags);
1181 peer2 = ksocknal_find_peer_locked(nid);
1182 if (peer2 == NULL) {
1183 /* NB this puts an "empty" peer in the peer
1184 * table (which takes my ref) */
1185 list_add_tail(&peer->ksnp_list,
1186 ksocknal_nid2peerlist(nid));
1188 ksocknal_put_peer(peer);
1192 atomic_inc(&peer->ksnp_refcount);
1194 write_unlock_irqrestore(global_lock, flags);
1198 ksocknal_create_routes(peer, conn->ksnc_port,
1202 rc = ksocknal_select_ips(peer, ipaddrs, nipaddrs);
1204 rc = ksocknal_send_hello (conn, ipaddrs, rc);
1209 write_lock_irqsave (global_lock, flags);
1211 if (peer->ksnp_closing ||
1212 (route != NULL && route->ksnr_deleted)) {
1213 /* route/peer got closed under me */
1218 /* Refuse to duplicate an existing connection (both sides might
1219 * autoconnect at once), unless this is a 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 ||
1227 conn2->ksnc_incarnation != incarnation)
1230 CWARN("Not creating duplicate connection to "
1231 "%u.%u.%u.%u type %d\n",
1232 HIPQUAD(conn->ksnc_ipaddr), conn->ksnc_type);
1238 /* If the connection created by this route didn't bind to the IP
1239 * address the route connected to, the connection/route matching
1240 * code below probably isn't going to work. */
1241 if (route != NULL &&
1242 route->ksnr_ipaddr != conn->ksnc_ipaddr) {
1243 CERROR("Route "LPX64" %u.%u.%u.%u connected to %u.%u.%u.%u\n",
1245 HIPQUAD(route->ksnr_ipaddr),
1246 HIPQUAD(conn->ksnc_ipaddr));
1249 /* Search for a route corresponding to the new connection and
1250 * create an association. This allows incoming connections created
1251 * by routes in my peer to match my own route entries so I don't
1252 * continually create duplicate routes. */
1253 list_for_each (tmp, &peer->ksnp_routes) {
1254 route = list_entry(tmp, ksock_route_t, ksnr_list);
1256 if (route->ksnr_ipaddr != conn->ksnc_ipaddr)
1259 ksocknal_associate_route_conn_locked(route, conn);
1263 conn->ksnc_peer = peer; /* conn takes my ref on peer */
1264 conn->ksnc_incarnation = incarnation;
1265 peer->ksnp_last_alive = jiffies;
1266 peer->ksnp_error = 0;
1268 sched = ksocknal_choose_scheduler_locked (irq);
1269 sched->kss_nconns++;
1270 conn->ksnc_scheduler = sched;
1272 /* Set the deadline for the outgoing HELLO to drain */
1273 conn->ksnc_tx_bufnob = sock->sk->sk_wmem_queued;
1274 conn->ksnc_tx_deadline = jiffies +
1275 ksocknal_tunables.ksnd_io_timeout * HZ;
1276 mb(); /* order with adding to peer's conn list */
1278 list_add (&conn->ksnc_list, &peer->ksnp_conns);
1279 atomic_inc (&conn->ksnc_refcount);
1281 /* NB my callbacks block while I hold ksnd_global_lock */
1282 sock->sk->sk_user_data = conn;
1283 sock->sk->sk_data_ready = ksocknal_data_ready;
1284 sock->sk->sk_write_space = ksocknal_write_space;
1286 /* Take all the packets blocking for a connection.
1287 * NB, it might be nicer to share these blocked packets among any
1288 * other connections that are becoming established. */
1289 while (!list_empty (&peer->ksnp_tx_queue)) {
1290 tx = list_entry (peer->ksnp_tx_queue.next,
1291 ksock_tx_t, tx_list);
1293 list_del (&tx->tx_list);
1294 ksocknal_queue_tx_locked (tx, conn);
1297 rc = ksocknal_close_stale_conns_locked(peer, incarnation);
1299 CERROR ("Closed %d stale conns to nid "LPX64" ip %d.%d.%d.%d\n",
1300 rc, conn->ksnc_peer->ksnp_nid,
1301 HIPQUAD(conn->ksnc_ipaddr));
1303 write_unlock_irqrestore (global_lock, flags);
1305 ksocknal_bind_irq (irq);
1307 /* Call the callbacks right now to get things going. */
1308 if (ksocknal_getconnsock(conn) == 0) {
1309 ksocknal_data_ready (sock->sk, 0);
1310 ksocknal_write_space (sock->sk);
1311 ksocknal_putconnsock(conn);
1314 CWARN("New conn nid:"LPX64" [type:%d] %u.%u.%u.%u -> %u.%u.%u.%u/%d"
1315 " incarnation:"LPX64" sched[%d]/%d\n",
1316 nid, conn->ksnc_type, HIPQUAD(conn->ksnc_myipaddr),
1317 HIPQUAD(conn->ksnc_ipaddr), conn->ksnc_port, incarnation,
1318 (int)(conn->ksnc_scheduler - ksocknal_data.ksnd_schedulers), irq);
1320 ksocknal_put_conn (conn);
1324 if (!peer->ksnp_closing &&
1325 list_empty (&peer->ksnp_conns) &&
1326 list_empty (&peer->ksnp_routes))
1327 ksocknal_unlink_peer_locked(peer);
1328 write_unlock_irqrestore(global_lock, flags);
1331 ksocknal_put_peer (peer);
1334 PORTAL_FREE (conn, sizeof(*conn));
1341 ksocknal_close_conn_locked (ksock_conn_t *conn, int error)
1343 /* This just does the immmediate housekeeping, and queues the
1344 * connection for the reaper to terminate.
1345 * Caller holds ksnd_global_lock exclusively in irq context */
1346 ksock_peer_t *peer = conn->ksnc_peer;
1347 ksock_route_t *route;
1348 ksock_conn_t *conn2;
1349 struct list_head *tmp;
1351 LASSERT (peer->ksnp_error == 0);
1352 LASSERT (!conn->ksnc_closing);
1353 conn->ksnc_closing = 1;
1354 atomic_inc (&ksocknal_data.ksnd_nclosing_conns);
1356 /* ksnd_deathrow_conns takes over peer's ref */
1357 list_del (&conn->ksnc_list);
1359 route = conn->ksnc_route;
1360 if (route != NULL) {
1361 /* dissociate conn from route... */
1362 LASSERT (!route->ksnr_deleted);
1363 LASSERT ((route->ksnr_connecting & (1 << conn->ksnc_type)) == 0);
1364 LASSERT ((route->ksnr_connected & (1 << conn->ksnc_type)) != 0);
1367 list_for_each(tmp, &peer->ksnp_conns) {
1368 conn2 = list_entry(tmp, ksock_conn_t, ksnc_list);
1370 if (conn2->ksnc_route == route &&
1371 conn2->ksnc_type == conn->ksnc_type)
1377 route->ksnr_connected &= ~(1 << conn->ksnc_type);
1379 conn->ksnc_route = NULL;
1381 #if 0 /* irrelevent with only eager routes */
1382 list_del (&route->ksnr_list); /* make route least favourite */
1383 list_add_tail (&route->ksnr_list, &peer->ksnp_routes);
1385 ksocknal_put_route (route); /* drop conn's ref on route */
1388 if (list_empty (&peer->ksnp_conns)) {
1389 /* No more connections to this peer */
1391 peer->ksnp_error = error; /* stash last conn close reason */
1393 if (list_empty (&peer->ksnp_routes)) {
1394 /* I've just closed last conn belonging to a
1395 * non-autoconnecting peer */
1396 ksocknal_unlink_peer_locked (peer);
1400 spin_lock (&ksocknal_data.ksnd_reaper_lock);
1402 list_add_tail (&conn->ksnc_list, &ksocknal_data.ksnd_deathrow_conns);
1403 wake_up (&ksocknal_data.ksnd_reaper_waitq);
1405 spin_unlock (&ksocknal_data.ksnd_reaper_lock);
1409 ksocknal_terminate_conn (ksock_conn_t *conn)
1411 /* This gets called by the reaper (guaranteed thread context) to
1412 * disengage the socket from its callbacks and close it.
1413 * ksnc_refcount will eventually hit zero, and then the reaper will
1415 unsigned long flags;
1416 ksock_peer_t *peer = conn->ksnc_peer;
1417 ksock_sched_t *sched = conn->ksnc_scheduler;
1422 LASSERT(conn->ksnc_closing);
1424 /* wake up the scheduler to "send" all remaining packets to /dev/null */
1425 spin_lock_irqsave(&sched->kss_lock, flags);
1427 if (!conn->ksnc_tx_scheduled &&
1428 !list_empty(&conn->ksnc_tx_queue)){
1429 list_add_tail (&conn->ksnc_tx_list,
1430 &sched->kss_tx_conns);
1431 /* a closing conn is always ready to tx */
1432 conn->ksnc_tx_ready = 1;
1433 conn->ksnc_tx_scheduled = 1;
1434 /* extra ref for scheduler */
1435 atomic_inc (&conn->ksnc_refcount);
1437 wake_up (&sched->kss_waitq);
1440 spin_unlock_irqrestore (&sched->kss_lock, flags);
1442 /* serialise with callbacks */
1443 write_lock_irqsave (&ksocknal_data.ksnd_global_lock, flags);
1445 /* Remove conn's network callbacks.
1446 * NB I _have_ to restore the callback, rather than storing a noop,
1447 * since the socket could survive past this module being unloaded!! */
1448 conn->ksnc_sock->sk->sk_data_ready = conn->ksnc_saved_data_ready;
1449 conn->ksnc_sock->sk->sk_write_space = conn->ksnc_saved_write_space;
1451 /* A callback could be in progress already; they hold a read lock
1452 * on ksnd_global_lock (to serialise with me) and NOOP if
1453 * sk_user_data is NULL. */
1454 conn->ksnc_sock->sk->sk_user_data = NULL;
1456 /* OK, so this conn may not be completely disengaged from its
1457 * scheduler yet, but it _has_ committed to terminate... */
1458 conn->ksnc_scheduler->kss_nconns--;
1460 if (peer->ksnp_error != 0) {
1461 /* peer's last conn closed in error */
1462 LASSERT (list_empty (&peer->ksnp_conns));
1464 /* convert peer's last-known-alive timestamp from jiffies */
1465 do_gettimeofday (&now);
1466 then = now.tv_sec - (jiffies - peer->ksnp_last_alive)/HZ;
1470 write_unlock_irqrestore (&ksocknal_data.ksnd_global_lock, flags);
1472 /* The socket is closed on the final put; either here, or in
1473 * ksocknal_{send,recv}msg(). Since we set up the linger2 option
1474 * when the connection was established, this will close the socket
1475 * immediately, aborting anything buffered in it. Any hung
1476 * zero-copy transmits will therefore complete in finite time. */
1477 ksocknal_putconnsock (conn);
1480 kpr_notify (&ksocknal_data.ksnd_router, peer->ksnp_nid,
1485 ksocknal_destroy_conn (ksock_conn_t *conn)
1487 /* Final coup-de-grace of the reaper */
1488 CDEBUG (D_NET, "connection %p\n", conn);
1490 LASSERT (atomic_read (&conn->ksnc_refcount) == 0);
1491 LASSERT (conn->ksnc_route == NULL);
1492 LASSERT (!conn->ksnc_tx_scheduled);
1493 LASSERT (!conn->ksnc_rx_scheduled);
1494 LASSERT (list_empty(&conn->ksnc_tx_queue));
1496 /* complete current receive if any */
1497 switch (conn->ksnc_rx_state) {
1498 case SOCKNAL_RX_BODY:
1499 CERROR("Completing partial receive from "LPX64
1500 ", ip %d.%d.%d.%d:%d, with error\n",
1501 conn->ksnc_peer->ksnp_nid,
1502 HIPQUAD(conn->ksnc_ipaddr), conn->ksnc_port);
1503 lib_finalize (&ksocknal_lib, NULL, conn->ksnc_cookie, PTL_FAIL);
1505 case SOCKNAL_RX_BODY_FWD:
1506 ksocknal_fmb_callback (conn->ksnc_cookie, -ECONNABORTED);
1508 case SOCKNAL_RX_HEADER:
1509 case SOCKNAL_RX_SLOP:
1516 ksocknal_put_peer (conn->ksnc_peer);
1518 PORTAL_FREE (conn, sizeof (*conn));
1519 atomic_dec (&ksocknal_data.ksnd_nclosing_conns);
1523 ksocknal_put_conn (ksock_conn_t *conn)
1525 unsigned long flags;
1527 CDEBUG (D_OTHER, "putting conn[%p] -> "LPX64" (%d)\n",
1528 conn, conn->ksnc_peer->ksnp_nid,
1529 atomic_read (&conn->ksnc_refcount));
1531 LASSERT (atomic_read (&conn->ksnc_refcount) > 0);
1532 if (!atomic_dec_and_test (&conn->ksnc_refcount))
1535 spin_lock_irqsave (&ksocknal_data.ksnd_reaper_lock, flags);
1537 list_add (&conn->ksnc_list, &ksocknal_data.ksnd_zombie_conns);
1538 wake_up (&ksocknal_data.ksnd_reaper_waitq);
1540 spin_unlock_irqrestore (&ksocknal_data.ksnd_reaper_lock, flags);
1544 ksocknal_close_peer_conns_locked (ksock_peer_t *peer, __u32 ipaddr, int why)
1547 struct list_head *ctmp;
1548 struct list_head *cnxt;
1551 list_for_each_safe (ctmp, cnxt, &peer->ksnp_conns) {
1552 conn = list_entry (ctmp, ksock_conn_t, ksnc_list);
1555 conn->ksnc_ipaddr == ipaddr) {
1557 ksocknal_close_conn_locked (conn, why);
1565 ksocknal_close_stale_conns_locked (ksock_peer_t *peer, __u64 incarnation)
1568 struct list_head *ctmp;
1569 struct list_head *cnxt;
1572 list_for_each_safe (ctmp, cnxt, &peer->ksnp_conns) {
1573 conn = list_entry (ctmp, ksock_conn_t, ksnc_list);
1575 if (conn->ksnc_incarnation == incarnation)
1578 CWARN("Closing stale conn nid:"LPX64" ip:%08x/%d "
1579 "incarnation:"LPX64"("LPX64")\n",
1580 peer->ksnp_nid, conn->ksnc_ipaddr, conn->ksnc_port,
1581 conn->ksnc_incarnation, incarnation);
1584 ksocknal_close_conn_locked (conn, -ESTALE);
1591 ksocknal_close_conn_and_siblings (ksock_conn_t *conn, int why)
1593 ksock_peer_t *peer = conn->ksnc_peer;
1594 __u32 ipaddr = conn->ksnc_ipaddr;
1595 unsigned long flags;
1598 write_lock_irqsave (&ksocknal_data.ksnd_global_lock, flags);
1600 count = ksocknal_close_peer_conns_locked (peer, ipaddr, why);
1602 write_unlock_irqrestore (&ksocknal_data.ksnd_global_lock, flags);
1608 ksocknal_close_matching_conns (ptl_nid_t nid, __u32 ipaddr)
1610 unsigned long flags;
1612 struct list_head *ptmp;
1613 struct list_head *pnxt;
1619 write_lock_irqsave (&ksocknal_data.ksnd_global_lock, flags);
1621 if (nid != PTL_NID_ANY)
1622 lo = hi = ksocknal_nid2peerlist(nid) - ksocknal_data.ksnd_peers;
1625 hi = ksocknal_data.ksnd_peer_hash_size - 1;
1628 for (i = lo; i <= hi; i++) {
1629 list_for_each_safe (ptmp, pnxt, &ksocknal_data.ksnd_peers[i]) {
1631 peer = list_entry (ptmp, ksock_peer_t, ksnp_list);
1633 if (!(nid == PTL_NID_ANY || nid == peer->ksnp_nid))
1636 count += ksocknal_close_peer_conns_locked (peer, ipaddr, 0);
1640 write_unlock_irqrestore (&ksocknal_data.ksnd_global_lock, flags);
1642 /* wildcards always succeed */
1643 if (nid == PTL_NID_ANY || ipaddr == 0)
1646 return (count == 0 ? -ENOENT : 0);
1650 ksocknal_notify (void *arg, ptl_nid_t gw_nid, int alive)
1652 /* The router is telling me she's been notified of a change in
1653 * gateway state.... */
1655 CDEBUG (D_NET, "gw "LPX64" %s\n", gw_nid, alive ? "up" : "down");
1658 /* If the gateway crashed, close all open connections... */
1659 ksocknal_close_matching_conns (gw_nid, 0);
1663 /* ...otherwise do nothing. We can only establish new connections
1664 * if we have autroutes, and these connect on demand. */
1667 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
1668 struct tcp_opt *sock2tcp_opt(struct sock *sk)
1670 return &(sk->tp_pinfo.af_tcp);
1673 struct tcp_opt *sock2tcp_opt(struct sock *sk)
1675 struct tcp_sock *s = (struct tcp_sock *)sk;
1681 ksocknal_push_conn (ksock_conn_t *conn)
1690 rc = ksocknal_getconnsock (conn);
1691 if (rc != 0) /* being shut down */
1694 sk = conn->ksnc_sock->sk;
1695 tp = sock2tcp_opt(sk);
1698 nonagle = tp->nonagle;
1705 rc = sk->sk_prot->setsockopt (sk, SOL_TCP, TCP_NODELAY,
1706 (char *)&val, sizeof (val));
1712 tp->nonagle = nonagle;
1715 ksocknal_putconnsock (conn);
1719 ksocknal_push_peer (ksock_peer_t *peer)
1723 struct list_head *tmp;
1726 for (index = 0; ; index++) {
1727 read_lock (&ksocknal_data.ksnd_global_lock);
1732 list_for_each (tmp, &peer->ksnp_conns) {
1734 conn = list_entry (tmp, ksock_conn_t, ksnc_list);
1735 atomic_inc (&conn->ksnc_refcount);
1740 read_unlock (&ksocknal_data.ksnd_global_lock);
1745 ksocknal_push_conn (conn);
1746 ksocknal_put_conn (conn);
1751 ksocknal_push (ptl_nid_t nid)
1754 struct list_head *tmp;
1760 if (nid != PTL_NID_ANY) {
1761 peer = ksocknal_get_peer (nid);
1765 ksocknal_push_peer (peer);
1766 ksocknal_put_peer (peer);
1771 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
1772 for (j = 0; ; j++) {
1773 read_lock (&ksocknal_data.ksnd_global_lock);
1778 list_for_each (tmp, &ksocknal_data.ksnd_peers[i]) {
1780 peer = list_entry(tmp, ksock_peer_t,
1782 atomic_inc (&peer->ksnp_refcount);
1787 read_unlock (&ksocknal_data.ksnd_global_lock);
1791 ksocknal_push_peer (peer);
1792 ksocknal_put_peer (peer);
1802 ksocknal_add_interface(__u32 ipaddress, __u32 netmask)
1804 unsigned long flags;
1805 ksock_interface_t *iface;
1809 struct list_head *ptmp;
1811 struct list_head *rtmp;
1812 ksock_route_t *route;
1814 if (ipaddress == 0 ||
1818 write_lock_irqsave(&ksocknal_data.ksnd_global_lock, flags);
1820 iface = ksocknal_ip2iface(ipaddress);
1821 if (iface != NULL) {
1822 /* silently ignore dups */
1824 } else if (ksocknal_data.ksnd_ninterfaces == SOCKNAL_MAX_INTERFACES) {
1827 iface = &ksocknal_data.ksnd_interfaces[ksocknal_data.ksnd_ninterfaces++];
1829 iface->ksni_ipaddr = ipaddress;
1830 iface->ksni_netmask = netmask;
1831 iface->ksni_nroutes = 0;
1832 iface->ksni_npeers = 0;
1834 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
1835 list_for_each(ptmp, &ksocknal_data.ksnd_peers[i]) {
1836 peer = list_entry(ptmp, ksock_peer_t, ksnp_list);
1838 for (j = 0; i < peer->ksnp_n_passive_ips; j++)
1839 if (peer->ksnp_passive_ips[j] == ipaddress)
1840 iface->ksni_npeers++;
1842 list_for_each(rtmp, &peer->ksnp_routes) {
1843 route = list_entry(rtmp, ksock_route_t, ksnr_list);
1845 if (route->ksnr_myipaddr == ipaddress)
1846 iface->ksni_nroutes++;
1852 /* NB only new connections will pay attention to the new interface! */
1855 write_unlock_irqrestore(&ksocknal_data.ksnd_global_lock, flags);
1861 ksocknal_peer_del_interface_locked(ksock_peer_t *peer, __u32 ipaddr)
1863 struct list_head *tmp;
1864 struct list_head *nxt;
1865 ksock_route_t *route;
1870 for (i = 0; i < peer->ksnp_n_passive_ips; i++)
1871 if (peer->ksnp_passive_ips[i] == ipaddr) {
1872 for (j = i+1; j < peer->ksnp_n_passive_ips; j++)
1873 peer->ksnp_passive_ips[j-1] =
1874 peer->ksnp_passive_ips[j];
1875 peer->ksnp_n_passive_ips--;
1879 list_for_each_safe(tmp, nxt, &peer->ksnp_routes) {
1880 route = list_entry (tmp, ksock_route_t, ksnr_list);
1882 if (route->ksnr_myipaddr != ipaddr)
1885 if (route->ksnr_share_count != 0) {
1886 /* Manually created; keep, but unbind */
1887 route->ksnr_myipaddr = 0;
1889 ksocknal_del_route_locked(route);
1893 list_for_each_safe(tmp, nxt, &peer->ksnp_conns) {
1894 conn = list_entry(tmp, ksock_conn_t, ksnc_list);
1896 if (conn->ksnc_myipaddr == ipaddr)
1897 ksocknal_close_conn_locked (conn, 0);
1902 ksocknal_del_interface(__u32 ipaddress)
1905 unsigned long flags;
1906 struct list_head *tmp;
1907 struct list_head *nxt;
1913 write_lock_irqsave(&ksocknal_data.ksnd_global_lock, flags);
1915 for (i = 0; i < ksocknal_data.ksnd_ninterfaces; i++) {
1916 this_ip = ksocknal_data.ksnd_interfaces[i].ksni_ipaddr;
1918 if (!(ipaddress == 0 ||
1919 ipaddress == this_ip))
1924 for (j = i+1; j < ksocknal_data.ksnd_ninterfaces; j++)
1925 ksocknal_data.ksnd_interfaces[j-1] =
1926 ksocknal_data.ksnd_interfaces[j];
1928 ksocknal_data.ksnd_ninterfaces--;
1930 for (j = 0; j < ksocknal_data.ksnd_peer_hash_size; j++) {
1931 list_for_each_safe(tmp, nxt, &ksocknal_data.ksnd_peers[j]) {
1932 peer = list_entry(tmp, ksock_peer_t, ksnp_list);
1934 ksocknal_peer_del_interface_locked(peer, this_ip);
1939 write_unlock_irqrestore(&ksocknal_data.ksnd_global_lock, flags);
1945 ksocknal_cmd(struct portals_cfg *pcfg, void * private)
1949 switch(pcfg->pcfg_command) {
1950 case NAL_CMD_GET_INTERFACE: {
1951 ksock_interface_t *iface;
1953 read_lock (&ksocknal_data.ksnd_global_lock);
1955 if (pcfg->pcfg_count < 0 ||
1956 pcfg->pcfg_count >= ksocknal_data.ksnd_ninterfaces) {
1960 iface = &ksocknal_data.ksnd_interfaces[pcfg->pcfg_count];
1962 pcfg->pcfg_id = iface->ksni_ipaddr;
1963 pcfg->pcfg_misc = iface->ksni_netmask;
1964 pcfg->pcfg_fd = iface->ksni_npeers;
1965 pcfg->pcfg_count = iface->ksni_nroutes;
1968 read_unlock (&ksocknal_data.ksnd_global_lock);
1971 case NAL_CMD_ADD_INTERFACE: {
1972 rc = ksocknal_add_interface(pcfg->pcfg_id, /* IP address */
1973 pcfg->pcfg_misc); /* net mask */
1976 case NAL_CMD_DEL_INTERFACE: {
1977 rc = ksocknal_del_interface(pcfg->pcfg_id); /* IP address */
1980 case NAL_CMD_GET_PEER: {
1986 int share_count = 0;
1988 rc = ksocknal_get_peer_info(pcfg->pcfg_count, &nid,
1990 &conn_count, &share_count);
1991 pcfg->pcfg_nid = nid;
1992 pcfg->pcfg_size = myip;
1994 pcfg->pcfg_misc = port;
1995 pcfg->pcfg_count = conn_count;
1996 pcfg->pcfg_wait = share_count;
1999 case NAL_CMD_ADD_PEER: {
2000 rc = ksocknal_add_peer (pcfg->pcfg_nid,
2001 pcfg->pcfg_id, /* IP */
2002 pcfg->pcfg_misc); /* port */
2005 case NAL_CMD_DEL_PEER: {
2006 rc = ksocknal_del_peer (pcfg->pcfg_nid,
2007 pcfg->pcfg_id, /* IP */
2008 pcfg->pcfg_flags); /* single_share? */
2011 case NAL_CMD_GET_CONN: {
2012 ksock_conn_t *conn = ksocknal_get_conn_by_idx (pcfg->pcfg_count);
2021 ksocknal_get_conn_tunables(conn, &txmem, &rxmem, &nagle);
2024 pcfg->pcfg_nid = conn->ksnc_peer->ksnp_nid;
2025 pcfg->pcfg_id = conn->ksnc_ipaddr;
2026 pcfg->pcfg_misc = conn->ksnc_port;
2027 pcfg->pcfg_fd = conn->ksnc_myipaddr;
2028 pcfg->pcfg_flags = conn->ksnc_type;
2029 pcfg->pcfg_gw_nal = conn->ksnc_scheduler -
2030 ksocknal_data.ksnd_schedulers;
2031 pcfg->pcfg_count = txmem;
2032 pcfg->pcfg_size = rxmem;
2033 pcfg->pcfg_wait = nagle;
2034 ksocknal_put_conn (conn);
2038 case NAL_CMD_REGISTER_PEER_FD: {
2039 struct socket *sock = sockfd_lookup (pcfg->pcfg_fd, &rc);
2040 int type = pcfg->pcfg_misc;
2046 case SOCKNAL_CONN_NONE:
2047 case SOCKNAL_CONN_ANY:
2048 case SOCKNAL_CONN_CONTROL:
2049 case SOCKNAL_CONN_BULK_IN:
2050 case SOCKNAL_CONN_BULK_OUT:
2051 rc = ksocknal_create_conn(NULL, sock, type);
2061 case NAL_CMD_CLOSE_CONNECTION: {
2062 rc = ksocknal_close_matching_conns (pcfg->pcfg_nid,
2066 case NAL_CMD_REGISTER_MYNID: {
2067 rc = ksocknal_set_mynid (pcfg->pcfg_nid);
2070 case NAL_CMD_PUSH_CONNECTION: {
2071 rc = ksocknal_push (pcfg->pcfg_nid);
2083 ksocknal_free_fmbs (ksock_fmb_pool_t *p)
2085 int npages = p->fmp_buff_pages;
2089 LASSERT (list_empty(&p->fmp_blocked_conns));
2090 LASSERT (p->fmp_nactive_fmbs == 0);
2092 while (!list_empty(&p->fmp_idle_fmbs)) {
2094 fmb = list_entry(p->fmp_idle_fmbs.next,
2095 ksock_fmb_t, fmb_list);
2097 for (i = 0; i < npages; i++)
2098 if (fmb->fmb_kiov[i].kiov_page != NULL)
2099 __free_page(fmb->fmb_kiov[i].kiov_page);
2101 list_del(&fmb->fmb_list);
2102 PORTAL_FREE(fmb, offsetof(ksock_fmb_t, fmb_kiov[npages]));
2107 ksocknal_free_buffers (void)
2109 ksocknal_free_fmbs(&ksocknal_data.ksnd_small_fmp);
2110 ksocknal_free_fmbs(&ksocknal_data.ksnd_large_fmp);
2112 LASSERT (atomic_read(&ksocknal_data.ksnd_nactive_ltxs) == 0);
2114 if (ksocknal_data.ksnd_schedulers != NULL)
2115 PORTAL_FREE (ksocknal_data.ksnd_schedulers,
2116 sizeof (ksock_sched_t) * ksocknal_data.ksnd_nschedulers);
2118 PORTAL_FREE (ksocknal_data.ksnd_peers,
2119 sizeof (struct list_head) *
2120 ksocknal_data.ksnd_peer_hash_size);
2124 ksocknal_api_shutdown (nal_t *nal)
2126 ksock_sched_t *sched;
2129 if (nal->nal_refct != 0) {
2130 /* This module got the first ref */
2131 PORTAL_MODULE_UNUSE;
2135 CDEBUG(D_MALLOC, "before NAL cleanup: kmem %d\n",
2136 atomic_read (&portal_kmemory));
2138 LASSERT(nal == &ksocknal_api);
2140 switch (ksocknal_data.ksnd_init) {
2144 case SOCKNAL_INIT_ALL:
2145 libcfs_nal_cmd_unregister(SOCKNAL);
2147 ksocknal_data.ksnd_init = SOCKNAL_INIT_LIB;
2150 case SOCKNAL_INIT_LIB:
2151 /* No more calls to ksocknal_cmd() to create new
2152 * autoroutes/connections since we're being unloaded. */
2154 /* Delete all peers */
2155 ksocknal_del_peer(PTL_NID_ANY, 0, 0);
2157 /* Wait for all peer state to clean up */
2159 while (atomic_read (&ksocknal_data.ksnd_npeers) != 0) {
2161 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* power of 2? */
2162 "waiting for %d peers to disconnect\n",
2163 atomic_read (&ksocknal_data.ksnd_npeers));
2164 set_current_state (TASK_UNINTERRUPTIBLE);
2165 schedule_timeout (HZ);
2168 /* Tell lib we've stopped calling into her. */
2169 lib_fini(&ksocknal_lib);
2171 ksocknal_data.ksnd_init = SOCKNAL_INIT_DATA;
2174 case SOCKNAL_INIT_DATA:
2175 LASSERT (atomic_read (&ksocknal_data.ksnd_npeers) == 0);
2176 LASSERT (ksocknal_data.ksnd_peers != NULL);
2177 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
2178 LASSERT (list_empty (&ksocknal_data.ksnd_peers[i]));
2180 LASSERT (list_empty (&ksocknal_data.ksnd_enomem_conns));
2181 LASSERT (list_empty (&ksocknal_data.ksnd_zombie_conns));
2182 LASSERT (list_empty (&ksocknal_data.ksnd_autoconnectd_routes));
2183 LASSERT (list_empty (&ksocknal_data.ksnd_small_fmp.fmp_blocked_conns));
2184 LASSERT (list_empty (&ksocknal_data.ksnd_large_fmp.fmp_blocked_conns));
2186 if (ksocknal_data.ksnd_schedulers != NULL)
2187 for (i = 0; i < ksocknal_data.ksnd_nschedulers; i++) {
2188 ksock_sched_t *kss =
2189 &ksocknal_data.ksnd_schedulers[i];
2191 LASSERT (list_empty (&kss->kss_tx_conns));
2192 LASSERT (list_empty (&kss->kss_rx_conns));
2193 LASSERT (kss->kss_nconns == 0);
2196 /* stop router calling me */
2197 kpr_shutdown (&ksocknal_data.ksnd_router);
2199 /* flag threads to terminate; wake and wait for them to die */
2200 ksocknal_data.ksnd_shuttingdown = 1;
2201 wake_up_all (&ksocknal_data.ksnd_autoconnectd_waitq);
2202 wake_up_all (&ksocknal_data.ksnd_reaper_waitq);
2204 for (i = 0; i < ksocknal_data.ksnd_nschedulers; i++) {
2205 sched = &ksocknal_data.ksnd_schedulers[i];
2206 wake_up_all(&sched->kss_waitq);
2210 read_lock(&ksocknal_data.ksnd_global_lock);
2211 while (ksocknal_data.ksnd_nthreads != 0) {
2213 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* power of 2? */
2214 "waiting for %d threads to terminate\n",
2215 ksocknal_data.ksnd_nthreads);
2216 read_unlock(&ksocknal_data.ksnd_global_lock);
2217 set_current_state (TASK_UNINTERRUPTIBLE);
2218 schedule_timeout (HZ);
2219 read_lock(&ksocknal_data.ksnd_global_lock);
2221 read_unlock(&ksocknal_data.ksnd_global_lock);
2223 kpr_deregister (&ksocknal_data.ksnd_router);
2225 ksocknal_free_buffers();
2227 ksocknal_data.ksnd_init = SOCKNAL_INIT_NOTHING;
2230 case SOCKNAL_INIT_NOTHING:
2234 CDEBUG(D_MALLOC, "after NAL cleanup: kmem %d\n",
2235 atomic_read (&portal_kmemory));
2237 printk(KERN_INFO "Lustre: Routing socket NAL unloaded (final mem %d)\n",
2238 atomic_read(&portal_kmemory));
2243 ksocknal_init_incarnation (void)
2247 /* The incarnation number is the time this module loaded and it
2248 * identifies this particular instance of the socknal. Hopefully
2249 * we won't be able to reboot more frequently than 1MHz for the
2250 * forseeable future :) */
2252 do_gettimeofday(&tv);
2254 ksocknal_data.ksnd_incarnation =
2255 (((__u64)tv.tv_sec) * 1000000) + tv.tv_usec;
2259 ksocknal_api_startup (nal_t *nal, ptl_pid_t requested_pid,
2260 ptl_ni_limits_t *requested_limits,
2261 ptl_ni_limits_t *actual_limits)
2263 ptl_process_id_t process_id;
2264 int pkmem = atomic_read(&portal_kmemory);
2269 LASSERT (nal == &ksocknal_api);
2271 if (nal->nal_refct != 0) {
2272 if (actual_limits != NULL)
2273 *actual_limits = ksocknal_lib.libnal_ni.ni_actual_limits;
2274 /* This module got the first ref */
2279 LASSERT (ksocknal_data.ksnd_init == SOCKNAL_INIT_NOTHING);
2281 memset (&ksocknal_data, 0, sizeof (ksocknal_data)); /* zero pointers */
2283 ksocknal_init_incarnation();
2285 ksocknal_data.ksnd_peer_hash_size = SOCKNAL_PEER_HASH_SIZE;
2286 PORTAL_ALLOC (ksocknal_data.ksnd_peers,
2287 sizeof (struct list_head) * ksocknal_data.ksnd_peer_hash_size);
2288 if (ksocknal_data.ksnd_peers == NULL)
2291 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++)
2292 INIT_LIST_HEAD(&ksocknal_data.ksnd_peers[i]);
2294 rwlock_init(&ksocknal_data.ksnd_global_lock);
2296 spin_lock_init(&ksocknal_data.ksnd_small_fmp.fmp_lock);
2297 INIT_LIST_HEAD(&ksocknal_data.ksnd_small_fmp.fmp_idle_fmbs);
2298 INIT_LIST_HEAD(&ksocknal_data.ksnd_small_fmp.fmp_blocked_conns);
2299 ksocknal_data.ksnd_small_fmp.fmp_buff_pages = SOCKNAL_SMALL_FWD_PAGES;
2301 spin_lock_init(&ksocknal_data.ksnd_large_fmp.fmp_lock);
2302 INIT_LIST_HEAD(&ksocknal_data.ksnd_large_fmp.fmp_idle_fmbs);
2303 INIT_LIST_HEAD(&ksocknal_data.ksnd_large_fmp.fmp_blocked_conns);
2304 ksocknal_data.ksnd_large_fmp.fmp_buff_pages = SOCKNAL_LARGE_FWD_PAGES;
2306 spin_lock_init (&ksocknal_data.ksnd_reaper_lock);
2307 INIT_LIST_HEAD (&ksocknal_data.ksnd_enomem_conns);
2308 INIT_LIST_HEAD (&ksocknal_data.ksnd_zombie_conns);
2309 INIT_LIST_HEAD (&ksocknal_data.ksnd_deathrow_conns);
2310 init_waitqueue_head(&ksocknal_data.ksnd_reaper_waitq);
2312 spin_lock_init (&ksocknal_data.ksnd_autoconnectd_lock);
2313 INIT_LIST_HEAD (&ksocknal_data.ksnd_autoconnectd_routes);
2314 init_waitqueue_head(&ksocknal_data.ksnd_autoconnectd_waitq);
2316 /* NB memset above zeros whole of ksocknal_data, including
2317 * ksocknal_data.ksnd_irqinfo[all].ksni_valid */
2319 /* flag lists/ptrs/locks initialised */
2320 ksocknal_data.ksnd_init = SOCKNAL_INIT_DATA;
2322 ksocknal_data.ksnd_nschedulers = ksocknal_nsched();
2323 PORTAL_ALLOC(ksocknal_data.ksnd_schedulers,
2324 sizeof(ksock_sched_t) * ksocknal_data.ksnd_nschedulers);
2325 if (ksocknal_data.ksnd_schedulers == NULL) {
2326 ksocknal_api_shutdown (nal);
2330 for (i = 0; i < ksocknal_data.ksnd_nschedulers; i++) {
2331 ksock_sched_t *kss = &ksocknal_data.ksnd_schedulers[i];
2333 spin_lock_init (&kss->kss_lock);
2334 INIT_LIST_HEAD (&kss->kss_rx_conns);
2335 INIT_LIST_HEAD (&kss->kss_tx_conns);
2337 INIT_LIST_HEAD (&kss->kss_zctxdone_list);
2339 init_waitqueue_head (&kss->kss_waitq);
2342 /* NB we have to wait to be told our true NID... */
2343 process_id.pid = requested_pid;
2346 rc = lib_init(&ksocknal_lib, nal, process_id,
2347 requested_limits, actual_limits);
2349 CERROR("lib_init failed: error %d\n", rc);
2350 ksocknal_api_shutdown (nal);
2354 ksocknal_data.ksnd_init = SOCKNAL_INIT_LIB; // flag lib_init() called
2356 for (i = 0; i < ksocknal_data.ksnd_nschedulers; i++) {
2357 rc = ksocknal_thread_start (ksocknal_scheduler,
2358 &ksocknal_data.ksnd_schedulers[i]);
2360 CERROR("Can't spawn socknal scheduler[%d]: %d\n",
2362 ksocknal_api_shutdown (nal);
2367 for (i = 0; i < SOCKNAL_N_AUTOCONNECTD; i++) {
2368 rc = ksocknal_thread_start (ksocknal_autoconnectd, (void *)((long)i));
2370 CERROR("Can't spawn socknal autoconnectd: %d\n", rc);
2371 ksocknal_api_shutdown (nal);
2376 rc = ksocknal_thread_start (ksocknal_reaper, NULL);
2378 CERROR ("Can't spawn socknal reaper: %d\n", rc);
2379 ksocknal_api_shutdown (nal);
2383 rc = kpr_register(&ksocknal_data.ksnd_router,
2384 &ksocknal_router_interface);
2386 CDEBUG(D_NET, "Can't initialise routing interface "
2387 "(rc = %d): not routing\n", rc);
2389 /* Only allocate forwarding buffers if there's a router */
2391 for (i = 0; i < (SOCKNAL_SMALL_FWD_NMSGS +
2392 SOCKNAL_LARGE_FWD_NMSGS); i++) {
2394 ksock_fmb_pool_t *pool;
2397 if (i < SOCKNAL_SMALL_FWD_NMSGS)
2398 pool = &ksocknal_data.ksnd_small_fmp;
2400 pool = &ksocknal_data.ksnd_large_fmp;
2402 PORTAL_ALLOC(fmb, offsetof(ksock_fmb_t,
2403 fmb_kiov[pool->fmp_buff_pages]));
2405 ksocknal_api_shutdown(nal);
2409 fmb->fmb_pool = pool;
2411 for (j = 0; j < pool->fmp_buff_pages; j++) {
2412 fmb->fmb_kiov[j].kiov_page = alloc_page(GFP_KERNEL);
2414 if (fmb->fmb_kiov[j].kiov_page == NULL) {
2415 ksocknal_api_shutdown (nal);
2419 LASSERT(page_address(fmb->fmb_kiov[j].kiov_page) != NULL);
2422 list_add(&fmb->fmb_list, &pool->fmp_idle_fmbs);
2426 rc = libcfs_nal_cmd_register(SOCKNAL, &ksocknal_cmd, NULL);
2428 CERROR ("Can't initialise command interface (rc = %d)\n", rc);
2429 ksocknal_api_shutdown (nal);
2433 /* flag everything initialised */
2434 ksocknal_data.ksnd_init = SOCKNAL_INIT_ALL;
2436 printk(KERN_INFO "Lustre: Routing socket NAL loaded "
2437 "(Routing %s, initial mem %d, incarnation "LPX64")\n",
2438 kpr_routing (&ksocknal_data.ksnd_router) ?
2439 "enabled" : "disabled", pkmem, ksocknal_data.ksnd_incarnation);
2445 ksocknal_module_fini (void)
2447 #ifdef CONFIG_SYSCTL
2448 if (ksocknal_tunables.ksnd_sysctl != NULL)
2449 unregister_sysctl_table (ksocknal_tunables.ksnd_sysctl);
2451 PtlNIFini(ksocknal_ni);
2453 ptl_unregister_nal(SOCKNAL);
2457 ksocknal_module_init (void)
2461 /* packet descriptor must fit in a router descriptor's scratchpad */
2462 LASSERT(sizeof (ksock_tx_t) <= sizeof (kprfd_scratch_t));
2463 /* the following must be sizeof(int) for proc_dointvec() */
2464 LASSERT(sizeof (ksocknal_tunables.ksnd_io_timeout) == sizeof (int));
2465 LASSERT(sizeof (ksocknal_tunables.ksnd_eager_ack) == sizeof (int));
2466 LASSERT(sizeof (ksocknal_tunables.ksnd_typed_conns) == sizeof (int));
2467 LASSERT(sizeof (ksocknal_tunables.ksnd_min_bulk) == sizeof (int));
2468 LASSERT(sizeof (ksocknal_tunables.ksnd_buffer_size) == sizeof (int));
2469 LASSERT(sizeof (ksocknal_tunables.ksnd_nagle) == sizeof (int));
2470 LASSERT(sizeof (ksocknal_tunables.ksnd_keepalive_idle) == sizeof (int));
2471 LASSERT(sizeof (ksocknal_tunables.ksnd_keepalive_count) == sizeof (int));
2472 LASSERT(sizeof (ksocknal_tunables.ksnd_keepalive_intvl) == sizeof (int));
2474 LASSERT(sizeof (ksocknal_tunables.ksnd_irq_affinity) == sizeof (int));
2477 LASSERT(sizeof (ksocknal_tunables.ksnd_zc_min_frag) == sizeof (int));
2479 /* check ksnr_connected/connecting field large enough */
2480 LASSERT(SOCKNAL_CONN_NTYPES <= 4);
2482 ksocknal_api.nal_ni_init = ksocknal_api_startup;
2483 ksocknal_api.nal_ni_fini = ksocknal_api_shutdown;
2485 /* Initialise dynamic tunables to defaults once only */
2486 ksocknal_tunables.ksnd_io_timeout = SOCKNAL_IO_TIMEOUT;
2487 ksocknal_tunables.ksnd_eager_ack = SOCKNAL_EAGER_ACK;
2488 ksocknal_tunables.ksnd_typed_conns = SOCKNAL_TYPED_CONNS;
2489 ksocknal_tunables.ksnd_min_bulk = SOCKNAL_MIN_BULK;
2490 ksocknal_tunables.ksnd_buffer_size = SOCKNAL_BUFFER_SIZE;
2491 ksocknal_tunables.ksnd_nagle = SOCKNAL_NAGLE;
2492 ksocknal_tunables.ksnd_keepalive_idle = SOCKNAL_KEEPALIVE_IDLE;
2493 ksocknal_tunables.ksnd_keepalive_count = SOCKNAL_KEEPALIVE_COUNT;
2494 ksocknal_tunables.ksnd_keepalive_intvl = SOCKNAL_KEEPALIVE_INTVL;
2496 ksocknal_tunables.ksnd_irq_affinity = SOCKNAL_IRQ_AFFINITY;
2499 ksocknal_tunables.ksnd_zc_min_frag = SOCKNAL_ZC_MIN_FRAG;
2502 rc = ptl_register_nal(SOCKNAL, &ksocknal_api);
2504 CERROR("Can't register SOCKNAL: %d\n", rc);
2505 return (-ENOMEM); /* or something... */
2508 /* Pure gateways want the NAL started up at module load time... */
2509 rc = PtlNIInit(SOCKNAL, LUSTRE_SRV_PTL_PID, NULL, NULL, &ksocknal_ni);
2510 if (rc != PTL_OK && rc != PTL_IFACE_DUP) {
2511 ptl_unregister_nal(SOCKNAL);
2515 #ifdef CONFIG_SYSCTL
2516 /* Press on regardless even if registering sysctl doesn't work */
2517 ksocknal_tunables.ksnd_sysctl =
2518 register_sysctl_table (ksocknal_top_ctl_table, 0);
2523 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
2524 MODULE_DESCRIPTION("Kernel TCP Socket NAL v0.01");
2525 MODULE_LICENSE("GPL");
2527 module_init(ksocknal_module_init);
2528 module_exit(ksocknal_module_fini);