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.
28 ptl_handle_ni_t ksocknal_ni;
29 static nal_t ksocknal_api;
30 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
31 ksock_nal_data_t ksocknal_data;
33 static ksock_nal_data_t ksocknal_data;
36 kpr_nal_interface_t ksocknal_router_interface = {
38 kprni_arg: &ksocknal_data,
39 kprni_fwd: ksocknal_fwd_packet,
40 kprni_notify: ksocknal_notify,
43 #define SOCKNAL_SYSCTL 200
45 #define SOCKNAL_SYSCTL_TIMEOUT 1
46 #define SOCKNAL_SYSCTL_EAGER_ACK 2
47 #define SOCKNAL_SYSCTL_ZERO_COPY 3
48 #define SOCKNAL_SYSCTL_TYPED 4
49 #define SOCKNAL_SYSCTL_MIN_BULK 5
51 static ctl_table ksocknal_ctl_table[] = {
52 {SOCKNAL_SYSCTL_TIMEOUT, "timeout",
53 &ksocknal_data.ksnd_io_timeout, sizeof (int),
54 0644, NULL, &proc_dointvec},
55 {SOCKNAL_SYSCTL_EAGER_ACK, "eager_ack",
56 &ksocknal_data.ksnd_eager_ack, sizeof (int),
57 0644, NULL, &proc_dointvec},
59 {SOCKNAL_SYSCTL_EAGER_ACK, "zero_copy",
60 &ksocknal_data.ksnd_zc_min_frag, sizeof (int),
61 0644, NULL, &proc_dointvec},
63 {SOCKNAL_SYSCTL_TYPED, "typed",
64 &ksocknal_data.ksnd_typed_conns, sizeof (int),
65 0644, NULL, &proc_dointvec},
66 {SOCKNAL_SYSCTL_MIN_BULK, "min_bulk",
67 &ksocknal_data.ksnd_min_bulk, sizeof (int),
68 0644, NULL, &proc_dointvec},
72 static ctl_table ksocknal_top_ctl_table[] = {
73 {SOCKNAL_SYSCTL, "socknal", NULL, 0, 0555, ksocknal_ctl_table},
78 ksocknal_api_forward(nal_t *nal, int id, void *args, size_t args_len,
79 void *ret, size_t ret_len)
85 nal_cb = k->ksnd_nal_cb;
87 lib_dispatch(nal_cb, k, id, args, ret); /* ksocknal_send needs k */
92 ksocknal_api_shutdown(nal_t *nal, int ni)
94 CDEBUG (D_NET, "closing all connections\n");
96 ksocknal_del_route (PTL_NID_ANY, 0, 0, 0);
97 ksocknal_close_matching_conns (PTL_NID_ANY, 0);
102 ksocknal_api_yield(nal_t *nal)
109 ksocknal_api_lock(nal_t *nal, unsigned long *flags)
115 nal_cb = k->ksnd_nal_cb;
116 nal_cb->cb_cli(nal_cb,flags);
120 ksocknal_api_unlock(nal_t *nal, unsigned long *flags)
126 nal_cb = k->ksnd_nal_cb;
127 nal_cb->cb_sti(nal_cb,flags);
131 ksocknal_init(int interface, ptl_pt_index_t ptl_size,
132 ptl_ac_index_t ac_size, ptl_pid_t requested_pid)
134 CDEBUG(D_NET, "calling lib_init with nid "LPX64"\n", (ptl_nid_t)0);
135 lib_init(&ksocknal_lib, (ptl_nid_t)0, 0, 10, ptl_size, ac_size);
136 return (&ksocknal_api);
140 * EXTRA functions follow
144 ksocknal_set_mynid(ptl_nid_t nid)
146 lib_ni_t *ni = &ksocknal_lib.ni;
148 /* FIXME: we have to do this because we call lib_init() at module
149 * insertion time, which is before we have 'mynid' available. lib_init
150 * sets the NAL's nid, which it uses to tell other nodes where packets
151 * are coming from. This is not a very graceful solution to this
154 CDEBUG(D_IOCTL, "setting mynid to "LPX64" (old nid="LPX64")\n",
162 ksocknal_bind_irq (unsigned int irq)
164 #if (defined(CONFIG_SMP) && CPU_AFFINITY)
168 ksock_irqinfo_t *info;
169 char *argv[] = {"/bin/sh",
173 char *envp[] = {"HOME=/",
174 "PATH=/sbin:/bin:/usr/sbin:/usr/bin",
177 LASSERT (irq < NR_IRQS);
178 if (irq == 0) /* software NIC */
181 info = &ksocknal_data.ksnd_irqinfo[irq];
183 write_lock_irqsave (&ksocknal_data.ksnd_global_lock, flags);
185 LASSERT (info->ksni_valid);
186 bind = !info->ksni_bound;
187 info->ksni_bound = 1;
189 write_unlock_irqrestore (&ksocknal_data.ksnd_global_lock, flags);
191 if (!bind) /* bound already */
194 snprintf (cmdline, sizeof (cmdline),
195 "echo %d > /proc/irq/%u/smp_affinity", 1 << info->ksni_sched, irq);
197 printk (KERN_INFO "Lustre: Binding irq %u to CPU %d with cmd: %s\n",
198 irq, info->ksni_sched, cmdline);
200 /* FIXME: Find a better method of setting IRQ affinity...
203 call_usermodehelper (argv[0], argv, envp);
208 ksocknal_create_route (__u32 ipaddr, int port, int buffer_size,
209 int irq_affinity, int eager)
211 ksock_route_t *route;
213 PORTAL_ALLOC (route, sizeof (*route));
217 atomic_set (&route->ksnr_refcount, 1);
218 route->ksnr_sharecount = 0;
219 route->ksnr_peer = NULL;
220 route->ksnr_timeout = jiffies;
221 route->ksnr_retry_interval = SOCKNAL_MIN_RECONNECT_INTERVAL;
222 route->ksnr_ipaddr = ipaddr;
223 route->ksnr_port = port;
224 route->ksnr_buffer_size = buffer_size;
225 route->ksnr_irq_affinity = irq_affinity;
226 route->ksnr_eager = eager;
227 route->ksnr_connecting = 0;
228 route->ksnr_connected = 0;
229 route->ksnr_deleted = 0;
230 route->ksnr_conn_count = 0;
236 ksocknal_destroy_route (ksock_route_t *route)
238 LASSERT (route->ksnr_sharecount == 0);
240 if (route->ksnr_peer != NULL)
241 ksocknal_put_peer (route->ksnr_peer);
243 PORTAL_FREE (route, sizeof (*route));
247 ksocknal_put_route (ksock_route_t *route)
249 CDEBUG (D_OTHER, "putting route[%p] (%d)\n",
250 route, atomic_read (&route->ksnr_refcount));
252 LASSERT (atomic_read (&route->ksnr_refcount) > 0);
253 if (!atomic_dec_and_test (&route->ksnr_refcount))
256 ksocknal_destroy_route (route);
260 ksocknal_create_peer (ptl_nid_t nid)
264 LASSERT (nid != PTL_NID_ANY);
266 PORTAL_ALLOC (peer, sizeof (*peer));
270 memset (peer, 0, sizeof (*peer));
272 peer->ksnp_nid = nid;
273 atomic_set (&peer->ksnp_refcount, 1); /* 1 ref for caller */
274 peer->ksnp_closing = 0;
275 INIT_LIST_HEAD (&peer->ksnp_conns);
276 INIT_LIST_HEAD (&peer->ksnp_routes);
277 INIT_LIST_HEAD (&peer->ksnp_tx_queue);
279 /* Can't unload while peers exist; ensures all I/O has terminated
280 * before unload attempts */
282 atomic_inc (&ksocknal_data.ksnd_npeers);
287 ksocknal_destroy_peer (ksock_peer_t *peer)
289 CDEBUG (D_NET, "peer "LPX64" %p deleted\n", peer->ksnp_nid, peer);
291 LASSERT (atomic_read (&peer->ksnp_refcount) == 0);
292 LASSERT (list_empty (&peer->ksnp_conns));
293 LASSERT (list_empty (&peer->ksnp_routes));
294 LASSERT (list_empty (&peer->ksnp_tx_queue));
296 PORTAL_FREE (peer, sizeof (*peer));
298 /* NB a peer's connections and autoconnect routes keep a reference
299 * on their peer until they are destroyed, so we can be assured
300 * that _all_ state to do with this peer has been cleaned up when
301 * its refcount drops to zero. */
302 atomic_dec (&ksocknal_data.ksnd_npeers);
307 ksocknal_put_peer (ksock_peer_t *peer)
309 CDEBUG (D_OTHER, "putting peer[%p] -> "LPX64" (%d)\n",
310 peer, peer->ksnp_nid,
311 atomic_read (&peer->ksnp_refcount));
313 LASSERT (atomic_read (&peer->ksnp_refcount) > 0);
314 if (!atomic_dec_and_test (&peer->ksnp_refcount))
317 ksocknal_destroy_peer (peer);
321 ksocknal_find_peer_locked (ptl_nid_t nid)
323 struct list_head *peer_list = ksocknal_nid2peerlist (nid);
324 struct list_head *tmp;
327 list_for_each (tmp, peer_list) {
329 peer = list_entry (tmp, ksock_peer_t, ksnp_list);
331 LASSERT (!peer->ksnp_closing);
332 LASSERT (!(list_empty (&peer->ksnp_routes) &&
333 list_empty (&peer->ksnp_conns)));
335 if (peer->ksnp_nid != nid)
338 CDEBUG(D_NET, "got peer [%p] -> "LPX64" (%d)\n",
339 peer, nid, atomic_read (&peer->ksnp_refcount));
346 ksocknal_get_peer (ptl_nid_t nid)
350 read_lock (&ksocknal_data.ksnd_global_lock);
351 peer = ksocknal_find_peer_locked (nid);
352 if (peer != NULL) /* +1 ref for caller? */
353 atomic_inc (&peer->ksnp_refcount);
354 read_unlock (&ksocknal_data.ksnd_global_lock);
360 ksocknal_unlink_peer_locked (ksock_peer_t *peer)
362 LASSERT (!peer->ksnp_closing);
363 peer->ksnp_closing = 1;
364 list_del (&peer->ksnp_list);
365 /* lose peerlist's ref */
366 ksocknal_put_peer (peer);
370 ksocknal_get_route_by_idx (int index)
373 struct list_head *ptmp;
374 ksock_route_t *route;
375 struct list_head *rtmp;
378 read_lock (&ksocknal_data.ksnd_global_lock);
380 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
381 list_for_each (ptmp, &ksocknal_data.ksnd_peers[i]) {
382 peer = list_entry (ptmp, ksock_peer_t, ksnp_list);
384 LASSERT (!(list_empty (&peer->ksnp_routes) &&
385 list_empty (&peer->ksnp_conns)));
387 list_for_each (rtmp, &peer->ksnp_routes) {
391 route = list_entry (rtmp, ksock_route_t, ksnr_list);
392 atomic_inc (&route->ksnr_refcount);
393 read_unlock (&ksocknal_data.ksnd_global_lock);
399 read_unlock (&ksocknal_data.ksnd_global_lock);
404 ksocknal_add_route (ptl_nid_t nid, __u32 ipaddr, int port, int bufnob,
405 int bind_irq, int share, int eager)
410 ksock_route_t *route;
411 struct list_head *rtmp;
412 ksock_route_t *route2;
414 if (nid == PTL_NID_ANY)
417 /* Have a brand new peer ready... */
418 peer = ksocknal_create_peer (nid);
422 route = ksocknal_create_route (ipaddr, port, bufnob,
425 ksocknal_put_peer (peer);
429 write_lock_irqsave (&ksocknal_data.ksnd_global_lock, flags);
431 peer2 = ksocknal_find_peer_locked (nid);
433 ksocknal_put_peer (peer);
436 /* peer table takes existing ref on peer */
437 list_add (&peer->ksnp_list,
438 ksocknal_nid2peerlist (nid));
443 /* check for existing route to this NID via this ipaddr */
444 list_for_each (rtmp, &peer->ksnp_routes) {
445 route2 = list_entry (rtmp, ksock_route_t, ksnr_list);
447 if (route2->ksnr_ipaddr == ipaddr)
454 if (route2 != NULL) {
455 ksocknal_put_route (route);
458 /* route takes a ref on peer */
459 route->ksnr_peer = peer;
460 atomic_inc (&peer->ksnp_refcount);
461 /* peer's route list takes existing ref on route */
462 list_add_tail (&route->ksnr_list, &peer->ksnp_routes);
465 route->ksnr_sharecount++;
467 write_unlock_irqrestore (&ksocknal_data.ksnd_global_lock, flags);
473 ksocknal_del_route_locked (ksock_route_t *route, int share, int keep_conn)
475 ksock_peer_t *peer = route->ksnr_peer;
477 struct list_head *ctmp;
478 struct list_head *cnxt;
481 route->ksnr_sharecount = 0;
483 route->ksnr_sharecount--;
484 if (route->ksnr_sharecount != 0)
488 list_for_each_safe (ctmp, cnxt, &peer->ksnp_conns) {
489 conn = list_entry(ctmp, ksock_conn_t, ksnc_list);
491 if (conn->ksnc_route != route)
495 ksocknal_close_conn_locked (conn, 0);
499 /* keeping the conn; just dissociate it and route... */
500 conn->ksnc_route = NULL;
501 ksocknal_put_route (route); /* drop conn's ref on route */
504 route->ksnr_deleted = 1;
505 list_del (&route->ksnr_list);
506 ksocknal_put_route (route); /* drop peer's ref */
508 if (list_empty (&peer->ksnp_routes) &&
509 list_empty (&peer->ksnp_conns)) {
510 /* I've just removed the last autoconnect route of a peer
511 * with no active connections */
512 ksocknal_unlink_peer_locked (peer);
517 ksocknal_del_route (ptl_nid_t nid, __u32 ipaddr, int share, int keep_conn)
520 struct list_head *ptmp;
521 struct list_head *pnxt;
523 struct list_head *rtmp;
524 struct list_head *rnxt;
525 ksock_route_t *route;
531 write_lock_irqsave (&ksocknal_data.ksnd_global_lock, flags);
533 if (nid != PTL_NID_ANY)
534 lo = hi = ksocknal_nid2peerlist(nid) - ksocknal_data.ksnd_peers;
537 hi = ksocknal_data.ksnd_peer_hash_size - 1;
540 for (i = lo; i <= hi; i++) {
541 list_for_each_safe (ptmp, pnxt, &ksocknal_data.ksnd_peers[i]) {
542 peer = list_entry (ptmp, ksock_peer_t, ksnp_list);
544 if (!(nid == PTL_NID_ANY || peer->ksnp_nid == nid))
547 list_for_each_safe (rtmp, rnxt, &peer->ksnp_routes) {
548 route = list_entry (rtmp, ksock_route_t,
552 route->ksnr_ipaddr == ipaddr))
555 ksocknal_del_route_locked (route, share, keep_conn);
556 rc = 0; /* matched something */
563 write_unlock_irqrestore (&ksocknal_data.ksnd_global_lock, flags);
569 ksocknal_get_conn_by_idx (int index)
572 struct list_head *ptmp;
574 struct list_head *ctmp;
577 read_lock (&ksocknal_data.ksnd_global_lock);
579 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
580 list_for_each (ptmp, &ksocknal_data.ksnd_peers[i]) {
581 peer = list_entry (ptmp, ksock_peer_t, ksnp_list);
583 LASSERT (!(list_empty (&peer->ksnp_routes) &&
584 list_empty (&peer->ksnp_conns)));
586 list_for_each (ctmp, &peer->ksnp_conns) {
590 conn = list_entry (ctmp, ksock_conn_t, ksnc_list);
591 atomic_inc (&conn->ksnc_refcount);
592 read_unlock (&ksocknal_data.ksnd_global_lock);
598 read_unlock (&ksocknal_data.ksnd_global_lock);
603 ksocknal_get_peer_addr (ksock_conn_t *conn)
605 struct sockaddr_in sin;
606 int len = sizeof (sin);
609 rc = conn->ksnc_sock->ops->getname (conn->ksnc_sock,
610 (struct sockaddr *)&sin, &len, 2);
611 /* Didn't need the {get,put}connsock dance to deref ksnc_sock... */
612 LASSERT (!conn->ksnc_closing);
613 LASSERT (len <= sizeof (sin));
616 CERROR ("Error %d getting sock peer IP\n", rc);
620 conn->ksnc_ipaddr = ntohl (sin.sin_addr.s_addr);
621 conn->ksnc_port = ntohs (sin.sin_port);
625 ksocknal_conn_irq (ksock_conn_t *conn)
628 struct dst_entry *dst;
630 dst = sk_dst_get (conn->ksnc_sock->sk);
632 if (dst->dev != NULL) {
634 if (irq >= NR_IRQS) {
635 CERROR ("Unexpected IRQ %x\n", irq);
642 /* Didn't need the {get,put}connsock dance to deref ksnc_sock... */
643 LASSERT (!conn->ksnc_closing);
648 ksocknal_choose_scheduler_locked (unsigned int irq)
650 ksock_sched_t *sched;
651 ksock_irqinfo_t *info;
654 LASSERT (irq < NR_IRQS);
655 info = &ksocknal_data.ksnd_irqinfo[irq];
657 if (irq != 0 && /* hardware NIC */
658 info->ksni_valid) { /* already set up */
659 return (&ksocknal_data.ksnd_schedulers[info->ksni_sched]);
662 /* software NIC (irq == 0) || not associated with a scheduler yet.
663 * Choose the CPU with the fewest connections... */
664 sched = &ksocknal_data.ksnd_schedulers[0];
665 for (i = 1; i < SOCKNAL_N_SCHED; i++)
666 if (sched->kss_nconns >
667 ksocknal_data.ksnd_schedulers[i].kss_nconns)
668 sched = &ksocknal_data.ksnd_schedulers[i];
670 if (irq != 0) { /* Hardware NIC */
671 info->ksni_valid = 1;
672 info->ksni_sched = sched - ksocknal_data.ksnd_schedulers;
675 LASSERT (info->ksni_sched == sched - ksocknal_data.ksnd_schedulers);
682 ksocknal_create_conn (ksock_route_t *route, struct socket *sock,
683 int bind_irq, int type)
691 ksock_sched_t *sched;
696 /* NB, sock has an associated file since (a) this connection might
697 * have been created in userland and (b) we need to refcount the
698 * socket so that we don't close it while I/O is being done on
699 * it, and sock->file has that pre-cooked... */
700 LASSERT (sock->file != NULL);
701 LASSERT (file_count(sock->file) > 0);
703 rc = ksocknal_setup_sock (sock);
708 /* acceptor or explicit connect */
711 LASSERT (type != SOCKNAL_CONN_NONE);
712 /* autoconnect: expect this nid on exchange */
713 nid = route->ksnr_peer->ksnp_nid;
716 rc = ksocknal_hello (sock, &nid, &type, &incarnation);
721 if (route == NULL) { /* not autoconnect */
722 /* Assume this socket connects to a brand new peer */
723 peer = ksocknal_create_peer (nid);
728 PORTAL_ALLOC(conn, sizeof(*conn));
731 ksocknal_put_peer (peer);
735 memset (conn, 0, sizeof (*conn));
736 conn->ksnc_peer = NULL;
737 conn->ksnc_route = NULL;
738 conn->ksnc_sock = sock;
739 conn->ksnc_type = type;
740 conn->ksnc_incarnation = incarnation;
741 conn->ksnc_saved_data_ready = sock->sk->sk_data_ready;
742 conn->ksnc_saved_write_space = sock->sk->sk_write_space;
743 atomic_set (&conn->ksnc_refcount, 1); /* 1 ref for me */
745 conn->ksnc_rx_ready = 0;
746 conn->ksnc_rx_scheduled = 0;
747 ksocknal_new_packet (conn, 0);
749 INIT_LIST_HEAD (&conn->ksnc_tx_queue);
750 conn->ksnc_tx_ready = 0;
751 conn->ksnc_tx_scheduled = 0;
752 atomic_set (&conn->ksnc_tx_nob, 0);
754 ksocknal_get_peer_addr (conn);
756 irq = ksocknal_conn_irq (conn);
758 write_lock_irqsave (&ksocknal_data.ksnd_global_lock, flags);
762 LASSERT ((route->ksnr_connected & (1 << type)) == 0);
763 LASSERT ((route->ksnr_connecting & (1 << type)) != 0);
765 if (route->ksnr_deleted) {
766 /* This conn was autoconnected, but the autoconnect
767 * route got deleted while it was being
769 write_unlock_irqrestore (&ksocknal_data.ksnd_global_lock,
771 PORTAL_FREE (conn, sizeof (*conn));
776 /* associate conn/route */
777 conn->ksnc_route = route;
778 atomic_inc (&route->ksnr_refcount);
780 route->ksnr_connecting &= ~(1 << type);
781 route->ksnr_connected |= (1 << type);
782 route->ksnr_conn_count++;
783 route->ksnr_retry_interval = SOCKNAL_MIN_RECONNECT_INTERVAL;
785 peer = route->ksnr_peer;
787 /* Not an autoconnected connection; see if there is an
788 * existing peer for this NID */
789 peer2 = ksocknal_find_peer_locked (nid);
791 ksocknal_put_peer (peer);
794 list_add (&peer->ksnp_list,
795 ksocknal_nid2peerlist (nid));
796 /* peer list takes over existing ref */
800 LASSERT (!peer->ksnp_closing);
802 conn->ksnc_peer = peer;
803 atomic_inc (&peer->ksnp_refcount);
804 peer->ksnp_last_alive = jiffies;
805 peer->ksnp_error = 0;
807 list_add (&conn->ksnc_list, &peer->ksnp_conns);
808 atomic_inc (&conn->ksnc_refcount);
810 sched = ksocknal_choose_scheduler_locked (irq);
812 conn->ksnc_scheduler = sched;
814 /* NB my callbacks block while I hold ksnd_global_lock */
815 sock->sk->sk_user_data = conn;
816 sock->sk->sk_data_ready = ksocknal_data_ready;
817 sock->sk->sk_write_space = ksocknal_write_space;
819 /* Take all the packets blocking for a connection.
820 * NB, it might be nicer to share these blocked packets among any
821 * other connections that are becoming established, however that
822 * confuses the normal packet launching operation, which selects a
823 * connection and queues the packet on it without needing an
824 * exclusive lock on ksnd_global_lock. */
825 while (!list_empty (&peer->ksnp_tx_queue)) {
826 tx = list_entry (peer->ksnp_tx_queue.next,
827 ksock_tx_t, tx_list);
829 list_del (&tx->tx_list);
830 ksocknal_queue_tx_locked (tx, conn);
833 rc = ksocknal_close_stale_conns_locked (peer, incarnation);
835 write_unlock_irqrestore (&ksocknal_data.ksnd_global_lock, flags);
838 CERROR ("Closed %d stale conns to "LPX64"\n", rc, nid);
840 if (bind_irq) /* irq binding required */
841 ksocknal_bind_irq (irq);
843 /* Call the callbacks right now to get things going. */
844 ksocknal_data_ready (sock->sk, 0);
845 ksocknal_write_space (sock->sk);
847 CDEBUG(D_IOCTL, "conn [%p] registered for nid "LPX64"\n",
848 conn, conn->ksnc_peer->ksnp_nid);
850 ksocknal_put_conn (conn);
855 ksocknal_close_conn_locked (ksock_conn_t *conn, int error)
857 /* This just does the immmediate housekeeping, and queues the
858 * connection for the reaper to terminate.
859 * Caller holds ksnd_global_lock exclusively in irq context */
860 ksock_peer_t *peer = conn->ksnc_peer;
861 ksock_route_t *route;
863 LASSERT (peer->ksnp_error == 0);
864 LASSERT (!conn->ksnc_closing);
865 conn->ksnc_closing = 1;
866 atomic_inc (&ksocknal_data.ksnd_nclosing_conns);
868 route = conn->ksnc_route;
870 /* dissociate conn from route... */
871 LASSERT (!route->ksnr_deleted);
872 LASSERT ((route->ksnr_connecting & (1 << conn->ksnc_type)) == 0);
873 LASSERT ((route->ksnr_connected & (1 << conn->ksnc_type)) != 0);
875 route->ksnr_connected &= ~(1 << conn->ksnc_type);
876 conn->ksnc_route = NULL;
878 list_del (&route->ksnr_list); /* make route least favourite */
879 list_add_tail (&route->ksnr_list, &peer->ksnp_routes);
881 ksocknal_put_route (route); /* drop conn's ref on route */
884 /* ksnd_deathrow_conns takes over peer's ref */
885 list_del (&conn->ksnc_list);
887 if (list_empty (&peer->ksnp_conns)) {
888 /* No more connections to this peer */
890 peer->ksnp_error = error; /* stash last conn close reason */
892 if (list_empty (&peer->ksnp_routes)) {
893 /* I've just closed last conn belonging to a
894 * non-autoconnecting peer */
895 ksocknal_unlink_peer_locked (peer);
899 spin_lock (&ksocknal_data.ksnd_reaper_lock);
901 list_add_tail (&conn->ksnc_list, &ksocknal_data.ksnd_deathrow_conns);
902 wake_up (&ksocknal_data.ksnd_reaper_waitq);
904 spin_unlock (&ksocknal_data.ksnd_reaper_lock);
908 ksocknal_terminate_conn (ksock_conn_t *conn)
910 /* This gets called by the reaper (guaranteed thread context) to
911 * disengage the socket from its callbacks and close it.
912 * ksnc_refcount will eventually hit zero, and then the reaper will
915 ksock_peer_t *peer = conn->ksnc_peer;
916 ksock_sched_t *sched = conn->ksnc_scheduler;
921 LASSERT(conn->ksnc_closing);
923 /* wake up the scheduler to "send" all remaining packets to /dev/null */
924 spin_lock_irqsave(&sched->kss_lock, flags);
926 if (!conn->ksnc_tx_scheduled &&
927 !list_empty(&conn->ksnc_tx_queue)){
928 list_add_tail (&conn->ksnc_tx_list,
929 &sched->kss_tx_conns);
930 /* a closing conn is always ready to tx */
931 conn->ksnc_tx_ready = 1;
932 conn->ksnc_tx_scheduled = 1;
933 /* extra ref for scheduler */
934 atomic_inc (&conn->ksnc_refcount);
936 wake_up (&sched->kss_waitq);
939 spin_unlock_irqrestore (&sched->kss_lock, flags);
941 /* serialise with callbacks */
942 write_lock_irqsave (&ksocknal_data.ksnd_global_lock, flags);
944 /* Remove conn's network callbacks.
945 * NB I _have_ to restore the callback, rather than storing a noop,
946 * since the socket could survive past this module being unloaded!! */
947 conn->ksnc_sock->sk->sk_data_ready = conn->ksnc_saved_data_ready;
948 conn->ksnc_sock->sk->sk_write_space = conn->ksnc_saved_write_space;
950 /* A callback could be in progress already; they hold a read lock
951 * on ksnd_global_lock (to serialise with me) and NOOP if
952 * sk_user_data is NULL. */
953 conn->ksnc_sock->sk->sk_user_data = NULL;
955 /* OK, so this conn may not be completely disengaged from its
956 * scheduler yet, but it _has_ committed to terminate... */
957 conn->ksnc_scheduler->kss_nconns--;
959 if (peer->ksnp_error != 0) {
960 /* peer's last conn closed in error */
961 LASSERT (list_empty (&peer->ksnp_conns));
963 /* convert peer's last-known-alive timestamp from jiffies */
964 do_gettimeofday (&now);
965 then = now.tv_sec - (jiffies - peer->ksnp_last_alive)/HZ;
969 write_unlock_irqrestore (&ksocknal_data.ksnd_global_lock, flags);
971 /* The socket is closed on the final put; either here, or in
972 * ksocknal_{send,recv}msg(). Since we set up the linger2 option
973 * when the connection was established, this will close the socket
974 * immediately, aborting anything buffered in it. Any hung
975 * zero-copy transmits will therefore complete in finite time. */
976 ksocknal_putconnsock (conn);
979 kpr_notify (&ksocknal_data.ksnd_router, peer->ksnp_nid,
984 ksocknal_destroy_conn (ksock_conn_t *conn)
986 /* Final coup-de-grace of the reaper */
987 CDEBUG (D_NET, "connection %p\n", conn);
989 LASSERT (atomic_read (&conn->ksnc_refcount) == 0);
990 LASSERT (conn->ksnc_route == NULL);
991 LASSERT (!conn->ksnc_tx_scheduled);
992 LASSERT (!conn->ksnc_rx_scheduled);
993 LASSERT (list_empty(&conn->ksnc_tx_queue));
995 /* complete current receive if any */
996 switch (conn->ksnc_rx_state) {
997 case SOCKNAL_RX_BODY:
999 lib_finalize (&ksocknal_lib, NULL, conn->ksnc_cookie);
1001 CERROR ("Refusing to complete a partial receive from "
1002 LPX64", ip %08x\n", conn->ksnc_peer->ksnp_nid,
1004 CERROR ("This may hang communications and "
1005 "prevent modules from unloading\n");
1008 case SOCKNAL_RX_BODY_FWD:
1009 ksocknal_fmb_callback (conn->ksnc_cookie, -ECONNABORTED);
1011 case SOCKNAL_RX_HEADER:
1012 case SOCKNAL_RX_SLOP:
1019 ksocknal_put_peer (conn->ksnc_peer);
1021 PORTAL_FREE (conn, sizeof (*conn));
1022 atomic_dec (&ksocknal_data.ksnd_nclosing_conns);
1026 ksocknal_put_conn (ksock_conn_t *conn)
1028 unsigned long flags;
1030 CDEBUG (D_OTHER, "putting conn[%p] -> "LPX64" (%d)\n",
1031 conn, conn->ksnc_peer->ksnp_nid,
1032 atomic_read (&conn->ksnc_refcount));
1034 LASSERT (atomic_read (&conn->ksnc_refcount) > 0);
1035 if (!atomic_dec_and_test (&conn->ksnc_refcount))
1038 spin_lock_irqsave (&ksocknal_data.ksnd_reaper_lock, flags);
1040 list_add (&conn->ksnc_list, &ksocknal_data.ksnd_zombie_conns);
1041 wake_up (&ksocknal_data.ksnd_reaper_waitq);
1043 spin_unlock_irqrestore (&ksocknal_data.ksnd_reaper_lock, flags);
1047 ksocknal_close_peer_conns_locked (ksock_peer_t *peer, __u32 ipaddr, int why)
1050 struct list_head *ctmp;
1051 struct list_head *cnxt;
1054 list_for_each_safe (ctmp, cnxt, &peer->ksnp_conns) {
1055 conn = list_entry (ctmp, ksock_conn_t, ksnc_list);
1058 conn->ksnc_ipaddr == ipaddr) {
1060 ksocknal_close_conn_locked (conn, why);
1068 ksocknal_close_stale_conns_locked (ksock_peer_t *peer, __u64 incarnation)
1071 struct list_head *ctmp;
1072 struct list_head *cnxt;
1075 list_for_each_safe (ctmp, cnxt, &peer->ksnp_conns) {
1076 conn = list_entry (ctmp, ksock_conn_t, ksnc_list);
1078 if (conn->ksnc_incarnation == incarnation)
1082 ksocknal_close_conn_locked (conn, -ESTALE);
1089 ksocknal_close_conn_and_siblings (ksock_conn_t *conn, int why)
1091 ksock_peer_t *peer = conn->ksnc_peer;
1092 __u32 ipaddr = conn->ksnc_ipaddr;
1093 unsigned long flags;
1096 write_lock_irqsave (&ksocknal_data.ksnd_global_lock, flags);
1098 count = ksocknal_close_peer_conns_locked (peer, ipaddr, why);
1100 write_unlock_irqrestore (&ksocknal_data.ksnd_global_lock, flags);
1106 ksocknal_close_matching_conns (ptl_nid_t nid, __u32 ipaddr)
1108 unsigned long flags;
1110 struct list_head *ptmp;
1111 struct list_head *pnxt;
1117 write_lock_irqsave (&ksocknal_data.ksnd_global_lock, flags);
1119 if (nid != PTL_NID_ANY)
1120 lo = hi = ksocknal_nid2peerlist(nid) - ksocknal_data.ksnd_peers;
1123 hi = ksocknal_data.ksnd_peer_hash_size - 1;
1126 for (i = lo; i <= hi; i++) {
1127 list_for_each_safe (ptmp, pnxt, &ksocknal_data.ksnd_peers[i]) {
1129 peer = list_entry (ptmp, ksock_peer_t, ksnp_list);
1131 if (!(nid == PTL_NID_ANY || nid == peer->ksnp_nid))
1134 count += ksocknal_close_peer_conns_locked (peer, ipaddr, 0);
1138 write_unlock_irqrestore (&ksocknal_data.ksnd_global_lock, flags);
1140 /* wildcards always succeed */
1141 if (nid == PTL_NID_ANY || ipaddr == 0)
1144 return (count == 0 ? -ENOENT : 0);
1148 ksocknal_notify (void *arg, ptl_nid_t gw_nid, int alive)
1150 /* The router is telling me she's been notified of a change in
1151 * gateway state.... */
1153 CDEBUG (D_NET, "gw "LPX64" %s\n", gw_nid, alive ? "up" : "down");
1156 /* If the gateway crashed, close all open connections... */
1157 ksocknal_close_matching_conns (gw_nid, 0);
1161 /* ...otherwise do nothing. We can only establish new connections
1162 * if we have autroutes, and these connect on demand. */
1165 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
1166 struct tcp_opt *sock2tcp_opt(struct sock *sk)
1168 return &(sk->tp_pinfo.af_tcp);
1171 struct tcp_opt *sock2tcp_opt(struct sock *sk)
1173 struct tcp_sock *s = (struct tcp_sock *)sk;
1179 ksocknal_push_conn (ksock_conn_t *conn)
1188 rc = ksocknal_getconnsock (conn);
1189 if (rc != 0) /* being shut down */
1192 sk = conn->ksnc_sock->sk;
1193 tp = sock2tcp_opt(sk);
1196 nonagle = tp->nonagle;
1203 rc = sk->sk_prot->setsockopt (sk, SOL_TCP, TCP_NODELAY,
1204 (char *)&val, sizeof (val));
1210 tp->nonagle = nonagle;
1213 ksocknal_putconnsock (conn);
1217 ksocknal_push_peer (ksock_peer_t *peer)
1221 struct list_head *tmp;
1224 for (index = 0; ; index++) {
1225 read_lock (&ksocknal_data.ksnd_global_lock);
1230 list_for_each (tmp, &peer->ksnp_conns) {
1232 conn = list_entry (tmp, ksock_conn_t, ksnc_list);
1233 atomic_inc (&conn->ksnc_refcount);
1238 read_unlock (&ksocknal_data.ksnd_global_lock);
1243 ksocknal_push_conn (conn);
1244 ksocknal_put_conn (conn);
1249 ksocknal_push (ptl_nid_t nid)
1252 struct list_head *tmp;
1258 if (nid != PTL_NID_ANY) {
1259 peer = ksocknal_get_peer (nid);
1263 ksocknal_push_peer (peer);
1264 ksocknal_put_peer (peer);
1269 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
1270 for (j = 0; ; j++) {
1271 read_lock (&ksocknal_data.ksnd_global_lock);
1276 list_for_each (tmp, &ksocknal_data.ksnd_peers[i]) {
1278 peer = list_entry(tmp, ksock_peer_t,
1280 atomic_inc (&peer->ksnp_refcount);
1285 read_unlock (&ksocknal_data.ksnd_global_lock);
1289 ksocknal_push_peer (peer);
1290 ksocknal_put_peer (peer);
1300 ksocknal_cmd(struct portals_cfg *pcfg, void * private)
1304 LASSERT (pcfg != NULL);
1306 switch(pcfg->pcfg_command) {
1307 case NAL_CMD_GET_AUTOCONN: {
1308 ksock_route_t *route = ksocknal_get_route_by_idx (pcfg->pcfg_count);
1314 pcfg->pcfg_nid = route->ksnr_peer->ksnp_nid;
1315 pcfg->pcfg_id = route->ksnr_ipaddr;
1316 pcfg->pcfg_misc = route->ksnr_port;
1317 pcfg->pcfg_count = route->ksnr_conn_count;
1318 pcfg->pcfg_size = route->ksnr_buffer_size;
1319 pcfg->pcfg_wait = route->ksnr_sharecount;
1320 pcfg->pcfg_flags = (route->ksnr_irq_affinity ? 2 : 0) |
1321 (route->ksnr_eager ? 4 : 0);
1322 ksocknal_put_route (route);
1326 case NAL_CMD_ADD_AUTOCONN: {
1327 rc = ksocknal_add_route (pcfg->pcfg_nid, pcfg->pcfg_id,
1328 pcfg->pcfg_misc, pcfg->pcfg_size,
1329 (pcfg->pcfg_flags & 0x02) != 0,
1330 (pcfg->pcfg_flags & 0x04) != 0,
1331 (pcfg->pcfg_flags & 0x08) != 0);
1334 case NAL_CMD_DEL_AUTOCONN: {
1335 rc = ksocknal_del_route (pcfg->pcfg_nid, pcfg->pcfg_id,
1336 (pcfg->pcfg_flags & 1) != 0,
1337 (pcfg->pcfg_flags & 2) != 0);
1340 case NAL_CMD_GET_CONN: {
1341 ksock_conn_t *conn = ksocknal_get_conn_by_idx (pcfg->pcfg_count);
1347 pcfg->pcfg_nid = conn->ksnc_peer->ksnp_nid;
1348 pcfg->pcfg_id = conn->ksnc_ipaddr;
1349 pcfg->pcfg_misc = conn->ksnc_port;
1350 pcfg->pcfg_flags = conn->ksnc_type;
1351 ksocknal_put_conn (conn);
1355 case NAL_CMD_REGISTER_PEER_FD: {
1356 struct socket *sock = sockfd_lookup (pcfg->pcfg_fd, &rc);
1357 int type = pcfg->pcfg_misc;
1363 case SOCKNAL_CONN_NONE:
1364 case SOCKNAL_CONN_ANY:
1365 case SOCKNAL_CONN_CONTROL:
1366 case SOCKNAL_CONN_BULK_IN:
1367 case SOCKNAL_CONN_BULK_OUT:
1368 rc = ksocknal_create_conn(NULL, sock, pcfg->pcfg_flags, type);
1376 case NAL_CMD_CLOSE_CONNECTION: {
1377 rc = ksocknal_close_matching_conns (pcfg->pcfg_nid,
1381 case NAL_CMD_REGISTER_MYNID: {
1382 rc = ksocknal_set_mynid (pcfg->pcfg_nid);
1385 case NAL_CMD_PUSH_CONNECTION: {
1386 rc = ksocknal_push (pcfg->pcfg_nid);
1395 ksocknal_free_fmbs (ksock_fmb_pool_t *p)
1400 LASSERT (list_empty(&p->fmp_blocked_conns));
1401 LASSERT (p->fmp_nactive_fmbs == 0);
1403 while (!list_empty(&p->fmp_idle_fmbs)) {
1405 fmb = list_entry(p->fmp_idle_fmbs.next,
1406 ksock_fmb_t, fmb_list);
1408 for (i = 0; i < fmb->fmb_npages; i++)
1409 if (fmb->fmb_pages[i] != NULL)
1410 __free_page(fmb->fmb_pages[i]);
1412 list_del(&fmb->fmb_list);
1413 PORTAL_FREE(fmb, sizeof(*fmb));
1418 ksocknal_free_buffers (void)
1420 ksocknal_free_fmbs(&ksocknal_data.ksnd_small_fmp);
1421 ksocknal_free_fmbs(&ksocknal_data.ksnd_large_fmp);
1423 LASSERT (atomic_read(&ksocknal_data.ksnd_nactive_ltxs) == 0);
1425 if (ksocknal_data.ksnd_schedulers != NULL)
1426 PORTAL_FREE (ksocknal_data.ksnd_schedulers,
1427 sizeof (ksock_sched_t) * SOCKNAL_N_SCHED);
1429 PORTAL_FREE (ksocknal_data.ksnd_peers,
1430 sizeof (struct list_head) *
1431 ksocknal_data.ksnd_peer_hash_size);
1435 ksocknal_module_fini (void)
1439 CDEBUG(D_MALLOC, "before NAL cleanup: kmem %d\n",
1440 atomic_read (&portal_kmemory));
1442 switch (ksocknal_data.ksnd_init) {
1446 case SOCKNAL_INIT_ALL:
1448 if (ksocknal_data.ksnd_sysctl != NULL)
1449 unregister_sysctl_table (ksocknal_data.ksnd_sysctl);
1451 kportal_nal_unregister(SOCKNAL);
1452 PORTAL_SYMBOL_UNREGISTER (ksocknal_ni);
1455 case SOCKNAL_INIT_PTL:
1456 PtlNIFini(ksocknal_ni);
1457 lib_fini(&ksocknal_lib);
1460 case SOCKNAL_INIT_DATA:
1461 /* Module refcount only gets to zero when all peers
1462 * have been closed so all lists must be empty */
1463 LASSERT (atomic_read (&ksocknal_data.ksnd_npeers) == 0);
1464 LASSERT (ksocknal_data.ksnd_peers != NULL);
1465 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
1466 LASSERT (list_empty (&ksocknal_data.ksnd_peers[i]));
1468 LASSERT (list_empty (&ksocknal_data.ksnd_enomem_conns));
1469 LASSERT (list_empty (&ksocknal_data.ksnd_zombie_conns));
1470 LASSERT (list_empty (&ksocknal_data.ksnd_autoconnectd_routes));
1471 LASSERT (list_empty (&ksocknal_data.ksnd_small_fmp.fmp_blocked_conns));
1472 LASSERT (list_empty (&ksocknal_data.ksnd_large_fmp.fmp_blocked_conns));
1474 if (ksocknal_data.ksnd_schedulers != NULL)
1475 for (i = 0; i < SOCKNAL_N_SCHED; i++) {
1476 ksock_sched_t *kss =
1477 &ksocknal_data.ksnd_schedulers[i];
1479 LASSERT (list_empty (&kss->kss_tx_conns));
1480 LASSERT (list_empty (&kss->kss_rx_conns));
1481 LASSERT (kss->kss_nconns == 0);
1484 /* stop router calling me */
1485 kpr_shutdown (&ksocknal_data.ksnd_router);
1487 /* flag threads to terminate; wake and wait for them to die */
1488 ksocknal_data.ksnd_shuttingdown = 1;
1489 wake_up_all (&ksocknal_data.ksnd_autoconnectd_waitq);
1490 wake_up_all (&ksocknal_data.ksnd_reaper_waitq);
1492 for (i = 0; i < SOCKNAL_N_SCHED; i++)
1493 wake_up_all(&ksocknal_data.ksnd_schedulers[i].kss_waitq);
1495 while (atomic_read (&ksocknal_data.ksnd_nthreads) != 0) {
1496 CDEBUG (D_NET, "waitinf for %d threads to terminate\n",
1497 atomic_read (&ksocknal_data.ksnd_nthreads));
1498 set_current_state (TASK_UNINTERRUPTIBLE);
1499 schedule_timeout (HZ);
1502 kpr_deregister (&ksocknal_data.ksnd_router);
1504 ksocknal_free_buffers();
1507 case SOCKNAL_INIT_NOTHING:
1511 CDEBUG(D_MALLOC, "after NAL cleanup: kmem %d\n",
1512 atomic_read (&portal_kmemory));
1514 printk(KERN_INFO "Lustre: Routing socket NAL unloaded (final mem %d)\n",
1515 atomic_read(&portal_kmemory));
1520 ksocknal_init_incarnation (void)
1524 /* The incarnation number is the time this module loaded and it
1525 * identifies this particular instance of the socknal. Hopefully
1526 * we won't be able to reboot more frequently than 1MHz for the
1527 * forseeable future :) */
1529 do_gettimeofday(&tv);
1531 ksocknal_data.ksnd_incarnation =
1532 (((__u64)tv.tv_sec) * 1000000) + tv.tv_usec;
1536 ksocknal_module_init (void)
1538 int pkmem = atomic_read(&portal_kmemory);
1543 /* packet descriptor must fit in a router descriptor's scratchpad */
1544 LASSERT(sizeof (ksock_tx_t) <= sizeof (kprfd_scratch_t));
1545 /* the following must be sizeof(int) for proc_dointvec() */
1546 LASSERT(sizeof (ksocknal_data.ksnd_io_timeout) == sizeof (int));
1547 LASSERT(sizeof (ksocknal_data.ksnd_eager_ack) == sizeof (int));
1548 /* check ksnr_connected/connecting field large enough */
1549 LASSERT(SOCKNAL_CONN_NTYPES <= 4);
1551 LASSERT (ksocknal_data.ksnd_init == SOCKNAL_INIT_NOTHING);
1553 ksocknal_api.forward = ksocknal_api_forward;
1554 ksocknal_api.shutdown = ksocknal_api_shutdown;
1555 ksocknal_api.yield = ksocknal_api_yield;
1556 ksocknal_api.validate = NULL; /* our api validate is a NOOP */
1557 ksocknal_api.lock = ksocknal_api_lock;
1558 ksocknal_api.unlock = ksocknal_api_unlock;
1559 ksocknal_api.nal_data = &ksocknal_data;
1561 ksocknal_lib.nal_data = &ksocknal_data;
1563 memset (&ksocknal_data, 0, sizeof (ksocknal_data)); /* zero pointers */
1565 ksocknal_data.ksnd_io_timeout = SOCKNAL_IO_TIMEOUT;
1566 ksocknal_data.ksnd_eager_ack = SOCKNAL_EAGER_ACK;
1567 ksocknal_data.ksnd_typed_conns = SOCKNAL_TYPED_CONNS;
1568 ksocknal_data.ksnd_min_bulk = SOCKNAL_MIN_BULK;
1570 ksocknal_data.ksnd_zc_min_frag = SOCKNAL_ZC_MIN_FRAG;
1572 ksocknal_init_incarnation();
1574 ksocknal_data.ksnd_peer_hash_size = SOCKNAL_PEER_HASH_SIZE;
1575 PORTAL_ALLOC (ksocknal_data.ksnd_peers,
1576 sizeof (struct list_head) * ksocknal_data.ksnd_peer_hash_size);
1577 if (ksocknal_data.ksnd_peers == NULL)
1580 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++)
1581 INIT_LIST_HEAD(&ksocknal_data.ksnd_peers[i]);
1583 rwlock_init(&ksocknal_data.ksnd_global_lock);
1585 ksocknal_data.ksnd_nal_cb = &ksocknal_lib;
1586 spin_lock_init (&ksocknal_data.ksnd_nal_cb_lock);
1588 spin_lock_init(&ksocknal_data.ksnd_small_fmp.fmp_lock);
1589 INIT_LIST_HEAD(&ksocknal_data.ksnd_small_fmp.fmp_idle_fmbs);
1590 INIT_LIST_HEAD(&ksocknal_data.ksnd_small_fmp.fmp_blocked_conns);
1592 spin_lock_init(&ksocknal_data.ksnd_large_fmp.fmp_lock);
1593 INIT_LIST_HEAD(&ksocknal_data.ksnd_large_fmp.fmp_idle_fmbs);
1594 INIT_LIST_HEAD(&ksocknal_data.ksnd_large_fmp.fmp_blocked_conns);
1596 spin_lock_init (&ksocknal_data.ksnd_reaper_lock);
1597 INIT_LIST_HEAD (&ksocknal_data.ksnd_enomem_conns);
1598 INIT_LIST_HEAD (&ksocknal_data.ksnd_zombie_conns);
1599 INIT_LIST_HEAD (&ksocknal_data.ksnd_deathrow_conns);
1600 init_waitqueue_head(&ksocknal_data.ksnd_reaper_waitq);
1602 spin_lock_init (&ksocknal_data.ksnd_autoconnectd_lock);
1603 INIT_LIST_HEAD (&ksocknal_data.ksnd_autoconnectd_routes);
1604 init_waitqueue_head(&ksocknal_data.ksnd_autoconnectd_waitq);
1606 /* NB memset above zeros whole of ksocknal_data, including
1607 * ksocknal_data.ksnd_irqinfo[all].ksni_valid */
1609 /* flag lists/ptrs/locks initialised */
1610 ksocknal_data.ksnd_init = SOCKNAL_INIT_DATA;
1612 PORTAL_ALLOC(ksocknal_data.ksnd_schedulers,
1613 sizeof(ksock_sched_t) * SOCKNAL_N_SCHED);
1614 if (ksocknal_data.ksnd_schedulers == NULL) {
1615 ksocknal_module_fini ();
1619 for (i = 0; i < SOCKNAL_N_SCHED; i++) {
1620 ksock_sched_t *kss = &ksocknal_data.ksnd_schedulers[i];
1622 spin_lock_init (&kss->kss_lock);
1623 INIT_LIST_HEAD (&kss->kss_rx_conns);
1624 INIT_LIST_HEAD (&kss->kss_tx_conns);
1626 INIT_LIST_HEAD (&kss->kss_zctxdone_list);
1628 init_waitqueue_head (&kss->kss_waitq);
1631 rc = PtlNIInit(ksocknal_init, 32, 4, 0, &ksocknal_ni);
1633 CERROR("ksocknal: PtlNIInit failed: error %d\n", rc);
1634 ksocknal_module_fini ();
1637 PtlNIDebug(ksocknal_ni, ~0);
1639 ksocknal_data.ksnd_init = SOCKNAL_INIT_PTL; // flag PtlNIInit() called
1641 for (i = 0; i < SOCKNAL_N_SCHED; i++) {
1642 rc = ksocknal_thread_start (ksocknal_scheduler,
1643 &ksocknal_data.ksnd_schedulers[i]);
1645 CERROR("Can't spawn socknal scheduler[%d]: %d\n",
1647 ksocknal_module_fini ();
1652 for (i = 0; i < SOCKNAL_N_AUTOCONNECTD; i++) {
1653 rc = ksocknal_thread_start (ksocknal_autoconnectd, (void *)((long)i));
1655 CERROR("Can't spawn socknal autoconnectd: %d\n", rc);
1656 ksocknal_module_fini ();
1661 rc = ksocknal_thread_start (ksocknal_reaper, NULL);
1663 CERROR ("Can't spawn socknal reaper: %d\n", rc);
1664 ksocknal_module_fini ();
1668 rc = kpr_register(&ksocknal_data.ksnd_router,
1669 &ksocknal_router_interface);
1671 CDEBUG(D_NET, "Can't initialise routing interface "
1672 "(rc = %d): not routing\n", rc);
1674 /* Only allocate forwarding buffers if I'm on a gateway */
1676 for (i = 0; i < (SOCKNAL_SMALL_FWD_NMSGS +
1677 SOCKNAL_LARGE_FWD_NMSGS); i++) {
1680 PORTAL_ALLOC(fmb, sizeof(*fmb));
1682 ksocknal_module_fini();
1686 if (i < SOCKNAL_SMALL_FWD_NMSGS) {
1687 fmb->fmb_npages = SOCKNAL_SMALL_FWD_PAGES;
1688 fmb->fmb_pool = &ksocknal_data.ksnd_small_fmp;
1690 fmb->fmb_npages = SOCKNAL_LARGE_FWD_PAGES;
1691 fmb->fmb_pool = &ksocknal_data.ksnd_large_fmp;
1694 for (j = 0; j < fmb->fmb_npages; j++) {
1695 fmb->fmb_pages[j] = alloc_page(GFP_KERNEL);
1697 if (fmb->fmb_pages[j] == NULL) {
1698 ksocknal_module_fini ();
1702 LASSERT(page_address(fmb->fmb_pages[j]) != NULL);
1705 list_add(&fmb->fmb_list, &fmb->fmb_pool->fmp_idle_fmbs);
1709 rc = kportal_nal_register(SOCKNAL, &ksocknal_cmd, NULL);
1711 CERROR ("Can't initialise command interface (rc = %d)\n", rc);
1712 ksocknal_module_fini ();
1716 PORTAL_SYMBOL_REGISTER(ksocknal_ni);
1718 #ifdef CONFIG_SYSCTL
1719 /* Press on regardless even if registering sysctl doesn't work */
1720 ksocknal_data.ksnd_sysctl = register_sysctl_table (ksocknal_top_ctl_table, 0);
1722 /* flag everything initialised */
1723 ksocknal_data.ksnd_init = SOCKNAL_INIT_ALL;
1725 printk(KERN_INFO "Lustre: Routing socket NAL loaded "
1726 "(Routing %s, initial mem %d)\n",
1727 kpr_routing (&ksocknal_data.ksnd_router) ?
1728 "enabled" : "disabled", pkmem);
1733 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1734 MODULE_DESCRIPTION("Kernel TCP Socket NAL v0.01");
1735 MODULE_LICENSE("GPL");
1737 module_init(ksocknal_module_init);
1738 module_exit(ksocknal_module_fini);
1740 EXPORT_SYMBOL (ksocknal_ni);