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
49 static ctl_table ksocknal_ctl_table[] = {
50 {SOCKNAL_SYSCTL_TIMEOUT, "timeout",
51 &ksocknal_data.ksnd_io_timeout, sizeof (int),
52 0644, NULL, &proc_dointvec},
53 {SOCKNAL_SYSCTL_EAGER_ACK, "eager_ack",
54 &ksocknal_data.ksnd_eager_ack, sizeof (int),
55 0644, NULL, &proc_dointvec},
57 {SOCKNAL_SYSCTL_EAGER_ACK, "zero_copy",
58 &ksocknal_data.ksnd_zc_min_frag, sizeof (int),
59 0644, NULL, &proc_dointvec},
64 static ctl_table ksocknal_top_ctl_table[] = {
65 {SOCKNAL_SYSCTL, "socknal", NULL, 0, 0555, ksocknal_ctl_table},
70 ksocknal_api_forward(nal_t *nal, int id, void *args, size_t args_len,
71 void *ret, size_t ret_len)
77 nal_cb = k->ksnd_nal_cb;
79 lib_dispatch(nal_cb, k, id, args, ret); /* ksocknal_send needs k */
84 ksocknal_api_shutdown(nal_t *nal, int ni)
86 CDEBUG (D_NET, "closing all connections\n");
88 ksocknal_del_route (PTL_NID_ANY, 0, 0, 0);
89 ksocknal_close_conn (PTL_NID_ANY, 0);
94 ksocknal_api_yield(nal_t *nal)
101 ksocknal_api_lock(nal_t *nal, unsigned long *flags)
107 nal_cb = k->ksnd_nal_cb;
108 nal_cb->cb_cli(nal_cb,flags);
112 ksocknal_api_unlock(nal_t *nal, unsigned long *flags)
118 nal_cb = k->ksnd_nal_cb;
119 nal_cb->cb_sti(nal_cb,flags);
123 ksocknal_init(int interface, ptl_pt_index_t ptl_size,
124 ptl_ac_index_t ac_size, ptl_pid_t requested_pid)
126 CDEBUG(D_NET, "calling lib_init with nid "LPX64"\n", (ptl_nid_t)0);
127 lib_init(&ksocknal_lib, (ptl_nid_t)0, 0, 10, ptl_size, ac_size);
128 return (&ksocknal_api);
132 * EXTRA functions follow
136 ksocknal_set_mynid(ptl_nid_t nid)
138 lib_ni_t *ni = &ksocknal_lib.ni;
140 /* FIXME: we have to do this because we call lib_init() at module
141 * insertion time, which is before we have 'mynid' available. lib_init
142 * sets the NAL's nid, which it uses to tell other nodes where packets
143 * are coming from. This is not a very graceful solution to this
146 CDEBUG(D_IOCTL, "setting mynid to "LPX64" (old nid="LPX64")\n",
154 ksocknal_bind_irq (unsigned int irq)
156 #if (defined(CONFIG_SMP) && CPU_AFFINITY)
160 ksock_irqinfo_t *info;
161 char *argv[] = {"/bin/sh",
165 char *envp[] = {"HOME=/",
166 "PATH=/sbin:/bin:/usr/sbin:/usr/bin",
169 LASSERT (irq < NR_IRQS);
170 if (irq == 0) /* software NIC */
173 info = &ksocknal_data.ksnd_irqinfo[irq];
175 write_lock_irqsave (&ksocknal_data.ksnd_global_lock, flags);
177 LASSERT (info->ksni_valid);
178 bind = !info->ksni_bound;
179 info->ksni_bound = 1;
181 write_unlock_irqrestore (&ksocknal_data.ksnd_global_lock, flags);
183 if (!bind) /* bound already */
186 snprintf (cmdline, sizeof (cmdline),
187 "echo %d > /proc/irq/%u/smp_affinity", 1 << info->ksni_sched, irq);
189 printk (KERN_INFO "Binding irq %u to CPU %d with cmd: %s\n",
190 irq, info->ksni_sched, cmdline);
192 /* FIXME: Find a better method of setting IRQ affinity...
195 call_usermodehelper (argv[0], argv, envp);
200 ksocknal_create_route (__u32 ipaddr, int port, int buffer_size,
201 int nonagel, int xchange_nids, int irq_affinity, int eager)
203 ksock_route_t *route;
205 PORTAL_ALLOC (route, sizeof (*route));
209 atomic_set (&route->ksnr_refcount, 1);
210 route->ksnr_sharecount = 0;
211 route->ksnr_peer = NULL;
212 route->ksnr_timeout = jiffies;
213 route->ksnr_retry_interval = SOCKNAL_MIN_RECONNECT_INTERVAL;
214 route->ksnr_ipaddr = ipaddr;
215 route->ksnr_port = port;
216 route->ksnr_buffer_size = buffer_size;
217 route->ksnr_irq_affinity = irq_affinity;
218 route->ksnr_xchange_nids = xchange_nids;
219 route->ksnr_nonagel = nonagel;
220 route->ksnr_eager = eager;
221 route->ksnr_connecting = 0;
222 route->ksnr_deleted = 0;
223 route->ksnr_generation = 0;
224 route->ksnr_conn = NULL;
230 ksocknal_destroy_route (ksock_route_t *route)
232 LASSERT (route->ksnr_sharecount == 0);
233 LASSERT (route->ksnr_conn == NULL);
235 if (route->ksnr_peer != NULL)
236 ksocknal_put_peer (route->ksnr_peer);
238 PORTAL_FREE (route, sizeof (*route));
242 ksocknal_put_route (ksock_route_t *route)
244 CDEBUG (D_OTHER, "putting route[%p] (%d)\n",
245 route, atomic_read (&route->ksnr_refcount));
247 LASSERT (atomic_read (&route->ksnr_refcount) > 0);
248 if (!atomic_dec_and_test (&route->ksnr_refcount))
251 ksocknal_destroy_route (route);
255 ksocknal_create_peer (ptl_nid_t nid)
259 LASSERT (nid != PTL_NID_ANY);
261 PORTAL_ALLOC (peer, sizeof (*peer));
265 memset (peer, 0, sizeof (*peer));
267 peer->ksnp_nid = nid;
268 atomic_set (&peer->ksnp_refcount, 1); /* 1 ref for caller */
269 peer->ksnp_closing = 0;
270 INIT_LIST_HEAD (&peer->ksnp_conns);
271 INIT_LIST_HEAD (&peer->ksnp_routes);
272 INIT_LIST_HEAD (&peer->ksnp_tx_queue);
274 /* Can't unload while peers exist; ensures all I/O has terminated
275 * before unload attempts */
277 atomic_inc (&ksocknal_data.ksnd_npeers);
282 ksocknal_destroy_peer (ksock_peer_t *peer)
284 CDEBUG (D_NET, "peer "LPX64" %p deleted\n", peer->ksnp_nid, peer);
286 LASSERT (atomic_read (&peer->ksnp_refcount) == 0);
287 LASSERT (list_empty (&peer->ksnp_conns));
288 LASSERT (list_empty (&peer->ksnp_routes));
289 LASSERT (list_empty (&peer->ksnp_tx_queue));
291 PORTAL_FREE (peer, sizeof (*peer));
293 /* NB a peer's connections and autoconnect routes keep a reference
294 * on their peer until they are destroyed, so we can be assured
295 * that _all_ state to do with this peer has been cleaned up when
296 * its refcount drops to zero. */
297 atomic_dec (&ksocknal_data.ksnd_npeers);
302 ksocknal_put_peer (ksock_peer_t *peer)
304 CDEBUG (D_OTHER, "putting peer[%p] -> "LPX64" (%d)\n",
305 peer, peer->ksnp_nid,
306 atomic_read (&peer->ksnp_refcount));
308 LASSERT (atomic_read (&peer->ksnp_refcount) > 0);
309 if (!atomic_dec_and_test (&peer->ksnp_refcount))
312 ksocknal_destroy_peer (peer);
316 ksocknal_find_peer_locked (ptl_nid_t nid)
318 struct list_head *peer_list = ksocknal_nid2peerlist (nid);
319 struct list_head *tmp;
322 list_for_each (tmp, peer_list) {
324 peer = list_entry (tmp, ksock_peer_t, ksnp_list);
326 LASSERT (!peer->ksnp_closing);
327 LASSERT (!(list_empty (&peer->ksnp_routes) &&
328 list_empty (&peer->ksnp_conns)));
330 if (peer->ksnp_nid != nid)
333 CDEBUG(D_NET, "got peer [%p] -> "LPX64" (%d)\n",
334 peer, nid, atomic_read (&peer->ksnp_refcount));
341 ksocknal_get_peer (ptl_nid_t nid)
345 read_lock (&ksocknal_data.ksnd_global_lock);
346 peer = ksocknal_find_peer_locked (nid);
347 if (peer != NULL) /* +1 ref for caller? */
348 atomic_inc (&peer->ksnp_refcount);
349 read_unlock (&ksocknal_data.ksnd_global_lock);
355 ksocknal_unlink_peer_locked (ksock_peer_t *peer)
357 LASSERT (!peer->ksnp_closing);
358 peer->ksnp_closing = 1;
359 list_del (&peer->ksnp_list);
360 /* lose peerlist's ref */
361 ksocknal_put_peer (peer);
365 ksocknal_get_route_by_idx (int index)
368 struct list_head *ptmp;
369 ksock_route_t *route;
370 struct list_head *rtmp;
373 read_lock (&ksocknal_data.ksnd_global_lock);
375 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
376 list_for_each (ptmp, &ksocknal_data.ksnd_peers[i]) {
377 peer = list_entry (ptmp, ksock_peer_t, ksnp_list);
379 LASSERT (!(list_empty (&peer->ksnp_routes) &&
380 list_empty (&peer->ksnp_conns)));
382 list_for_each (rtmp, &peer->ksnp_routes) {
386 route = list_entry (rtmp, ksock_route_t, ksnr_list);
387 atomic_inc (&route->ksnr_refcount);
388 read_unlock (&ksocknal_data.ksnd_global_lock);
394 read_unlock (&ksocknal_data.ksnd_global_lock);
399 ksocknal_add_route (ptl_nid_t nid, __u32 ipaddr, int port, int bufnob,
400 int nonagle, int xchange_nids, int bind_irq,
401 int share, int eager)
406 ksock_route_t *route;
407 struct list_head *rtmp;
408 ksock_route_t *route2;
410 if (nid == PTL_NID_ANY)
413 /* Have a brand new peer ready... */
414 peer = ksocknal_create_peer (nid);
418 route = ksocknal_create_route (ipaddr, port, bufnob, nonagle,
419 xchange_nids, bind_irq, eager);
421 ksocknal_put_peer (peer);
425 write_lock_irqsave (&ksocknal_data.ksnd_global_lock, flags);
427 peer2 = ksocknal_find_peer_locked (nid);
429 ksocknal_put_peer (peer);
432 /* peer table takes existing ref on peer */
433 list_add (&peer->ksnp_list,
434 ksocknal_nid2peerlist (nid));
439 /* check for existing route to this NID via this ipaddr */
440 list_for_each (rtmp, &peer->ksnp_routes) {
441 route2 = list_entry (rtmp, ksock_route_t, ksnr_list);
443 if (route2->ksnr_ipaddr == ipaddr)
450 if (route2 != NULL) {
451 ksocknal_put_route (route);
454 /* route takes a ref on peer */
455 route->ksnr_peer = peer;
456 atomic_inc (&peer->ksnp_refcount);
457 /* peer's route list takes existing ref on route */
458 list_add (&route->ksnr_list, &peer->ksnp_routes);
461 route->ksnr_sharecount++;
463 write_unlock_irqrestore (&ksocknal_data.ksnd_global_lock, flags);
469 ksocknal_del_route_locked (ksock_route_t *route, int share, int keep_conn)
471 ksock_peer_t *peer = route->ksnr_peer;
472 ksock_conn_t *conn = route->ksnr_conn;
475 route->ksnr_sharecount = 0;
477 route->ksnr_sharecount--;
478 if (route->ksnr_sharecount != 0)
484 ksocknal_close_conn_locked (conn, 0);
486 /* keeping the conn; just dissociate it and route... */
487 conn->ksnc_route = NULL;
488 route->ksnr_conn = NULL;
489 ksocknal_put_route (route); /* drop conn's ref on route */
490 ksocknal_put_conn (conn); /* drop route's ref on conn */
494 route->ksnr_deleted = 1;
495 list_del (&route->ksnr_list);
496 ksocknal_put_route (route); /* drop peer's ref */
498 if (list_empty (&peer->ksnp_routes) &&
499 list_empty (&peer->ksnp_conns)) {
500 /* I've just removed the last autoconnect route of a peer
501 * with no active connections */
502 ksocknal_unlink_peer_locked (peer);
507 ksocknal_del_route (ptl_nid_t nid, __u32 ipaddr, int share, int keep_conn)
510 struct list_head *ptmp;
511 struct list_head *pnxt;
513 struct list_head *rtmp;
514 struct list_head *rnxt;
515 ksock_route_t *route;
521 write_lock_irqsave (&ksocknal_data.ksnd_global_lock, flags);
523 if (nid != PTL_NID_ANY)
524 lo = hi = ksocknal_nid2peerlist(nid) - ksocknal_data.ksnd_peers;
527 hi = ksocknal_data.ksnd_peer_hash_size - 1;
530 for (i = lo; i <= hi; i++) {
531 list_for_each_safe (ptmp, pnxt, &ksocknal_data.ksnd_peers[i]) {
532 peer = list_entry (ptmp, ksock_peer_t, ksnp_list);
534 if (!(nid == PTL_NID_ANY || peer->ksnp_nid == nid))
537 list_for_each_safe (rtmp, rnxt, &peer->ksnp_routes) {
538 route = list_entry (rtmp, ksock_route_t,
542 route->ksnr_ipaddr == ipaddr))
545 ksocknal_del_route_locked (route, share, keep_conn);
546 rc = 0; /* matched something */
553 write_unlock_irqrestore (&ksocknal_data.ksnd_global_lock, flags);
559 ksocknal_get_conn_by_idx (int index)
562 struct list_head *ptmp;
564 struct list_head *ctmp;
567 read_lock (&ksocknal_data.ksnd_global_lock);
569 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
570 list_for_each (ptmp, &ksocknal_data.ksnd_peers[i]) {
571 peer = list_entry (ptmp, ksock_peer_t, ksnp_list);
573 LASSERT (!(list_empty (&peer->ksnp_routes) &&
574 list_empty (&peer->ksnp_conns)));
576 list_for_each (ctmp, &peer->ksnp_conns) {
580 conn = list_entry (ctmp, ksock_conn_t, ksnc_list);
581 atomic_inc (&conn->ksnc_refcount);
582 read_unlock (&ksocknal_data.ksnd_global_lock);
588 read_unlock (&ksocknal_data.ksnd_global_lock);
593 ksocknal_get_peer_addr (ksock_conn_t *conn)
595 struct sockaddr_in sin;
596 int len = sizeof (sin);
599 rc = conn->ksnc_sock->ops->getname (conn->ksnc_sock,
600 (struct sockaddr *)&sin, &len, 2);
601 /* Didn't need the {get,put}connsock dance to deref ksnc_sock... */
602 LASSERT (!conn->ksnc_closing);
603 LASSERT (len <= sizeof (sin));
606 CERROR ("Error %d getting sock peer IP\n", rc);
610 conn->ksnc_ipaddr = ntohl (sin.sin_addr.s_addr);
611 conn->ksnc_port = ntohs (sin.sin_port);
615 ksocknal_conn_irq (ksock_conn_t *conn)
618 struct dst_entry *dst;
620 dst = sk_dst_get (conn->ksnc_sock->sk);
622 if (dst->dev != NULL) {
624 if (irq >= NR_IRQS) {
625 CERROR ("Unexpected IRQ %x\n", irq);
632 /* Didn't need the {get,put}connsock dance to deref ksnc_sock... */
633 LASSERT (!conn->ksnc_closing);
638 ksocknal_choose_scheduler_locked (unsigned int irq)
640 ksock_sched_t *sched;
641 ksock_irqinfo_t *info;
644 LASSERT (irq < NR_IRQS);
645 info = &ksocknal_data.ksnd_irqinfo[irq];
647 if (irq != 0 && /* hardware NIC */
648 info->ksni_valid) { /* already set up */
649 return (&ksocknal_data.ksnd_schedulers[info->ksni_sched]);
652 /* software NIC (irq == 0) || not associated with a scheduler yet.
653 * Choose the CPU with the fewest connections... */
654 sched = &ksocknal_data.ksnd_schedulers[0];
655 for (i = 1; i < SOCKNAL_N_SCHED; i++)
656 if (sched->kss_nconns >
657 ksocknal_data.ksnd_schedulers[i].kss_nconns)
658 sched = &ksocknal_data.ksnd_schedulers[i];
660 if (irq != 0) { /* Hardware NIC */
661 info->ksni_valid = 1;
662 info->ksni_sched = sched - ksocknal_data.ksnd_schedulers;
665 LASSERT (info->ksni_sched == sched - ksocknal_data.ksnd_schedulers);
672 ksocknal_create_conn (ptl_nid_t nid, ksock_route_t *route,
673 struct socket *sock, int bind_irq)
679 ksock_sched_t *sched;
684 /* NB, sock has an associated file since (a) this connection might
685 * have been created in userland and (b) we need to refcount the
686 * socket so that we don't close it while I/O is being done on
687 * it, and sock->file has that pre-cooked... */
688 LASSERT (sock->file != NULL);
689 LASSERT (file_count(sock->file) > 0);
691 rc = ksocknal_setup_sock (sock);
696 if (route == NULL) { /* not autoconnect */
697 /* Assume this socket connects to a brand new peer */
698 peer = ksocknal_create_peer (nid);
703 PORTAL_ALLOC(conn, sizeof(*conn));
706 ksocknal_put_peer (peer);
710 memset (conn, 0, sizeof (*conn));
711 conn->ksnc_peer = NULL;
712 conn->ksnc_route = NULL;
713 conn->ksnc_sock = sock;
714 conn->ksnc_saved_data_ready = sock->sk->sk_data_ready;
715 conn->ksnc_saved_write_space = sock->sk->sk_write_space;
716 atomic_set (&conn->ksnc_refcount, 1); /* 1 ref for me */
718 conn->ksnc_rx_ready = 0;
719 conn->ksnc_rx_scheduled = 0;
720 ksocknal_new_packet (conn, 0);
722 INIT_LIST_HEAD (&conn->ksnc_tx_queue);
723 conn->ksnc_tx_ready = 0;
724 conn->ksnc_tx_scheduled = 0;
725 atomic_set (&conn->ksnc_tx_nob, 0);
727 ksocknal_get_peer_addr (conn);
729 irq = ksocknal_conn_irq (conn);
731 write_lock_irqsave (&ksocknal_data.ksnd_global_lock, flags);
735 LASSERT (route->ksnr_conn == NULL && route->ksnr_connecting);
737 if (route->ksnr_deleted) {
738 /* This conn was autoconnected, but the autoconnect
739 * route got deleted while it was being
741 write_unlock_irqrestore (&ksocknal_data.ksnd_global_lock,
743 PORTAL_FREE (conn, sizeof (*conn));
748 /* associate conn/route for auto-reconnect */
749 route->ksnr_conn = conn;
750 atomic_inc (&conn->ksnc_refcount);
751 conn->ksnc_route = route;
752 atomic_inc (&route->ksnr_refcount);
753 route->ksnr_connecting = 0;
755 route->ksnr_generation++;
756 route->ksnr_retry_interval = SOCKNAL_MIN_RECONNECT_INTERVAL;
758 peer = route->ksnr_peer;
760 /* Not an autoconnected connection; see if there is an
761 * existing peer for this NID */
762 peer2 = ksocknal_find_peer_locked (nid);
764 ksocknal_put_peer (peer);
767 list_add (&peer->ksnp_list,
768 ksocknal_nid2peerlist (nid));
769 /* peer list takes over existing ref */
773 LASSERT (!peer->ksnp_closing);
775 conn->ksnc_peer = peer;
776 atomic_inc (&peer->ksnp_refcount);
777 peer->ksnp_last_alive = jiffies;
778 peer->ksnp_error = 0;
780 list_add (&conn->ksnc_list, &peer->ksnp_conns);
781 atomic_inc (&conn->ksnc_refcount);
783 sched = ksocknal_choose_scheduler_locked (irq);
785 conn->ksnc_scheduler = sched;
787 /* NB my callbacks block while I hold ksnd_global_lock */
788 sock->sk->sk_user_data = conn;
789 sock->sk->sk_data_ready = ksocknal_data_ready;
790 sock->sk->sk_write_space = ksocknal_write_space;
792 /* Take all the packets blocking for a connection.
793 * NB, it might be nicer to share these blocked packets among any
794 * other connections that are becoming established, however that
795 * confuses the normal packet launching operation, which selects a
796 * connection and queues the packet on it without needing an
797 * exclusive lock on ksnd_global_lock. */
798 while (!list_empty (&peer->ksnp_tx_queue)) {
799 tx = list_entry (peer->ksnp_tx_queue.next,
800 ksock_tx_t, tx_list);
802 list_del (&tx->tx_list);
803 ksocknal_queue_tx_locked (tx, conn);
806 write_unlock_irqrestore (&ksocknal_data.ksnd_global_lock, flags);
808 if (bind_irq) /* irq binding required */
809 ksocknal_bind_irq (irq);
811 /* Call the callbacks right now to get things going. */
812 ksocknal_data_ready (sock->sk, 0);
813 ksocknal_write_space (sock->sk);
815 CDEBUG(D_IOCTL, "conn [%p] registered for nid "LPX64"\n",
816 conn, conn->ksnc_peer->ksnp_nid);
818 ksocknal_put_conn (conn);
823 ksocknal_close_conn_locked (ksock_conn_t *conn, int error)
825 /* This just does the immmediate housekeeping, and queues the
826 * connection for the reaper to terminate.
827 * Caller holds ksnd_global_lock exclusively in irq context */
828 ksock_peer_t *peer = conn->ksnc_peer;
829 ksock_route_t *route;
831 LASSERT (peer->ksnp_error == 0);
832 LASSERT (!conn->ksnc_closing);
833 conn->ksnc_closing = 1;
834 atomic_inc (&ksocknal_data.ksnd_nclosing_conns);
836 route = conn->ksnc_route;
838 /* dissociate conn from route... */
839 LASSERT (!route->ksnr_connecting &&
840 !route->ksnr_deleted);
842 route->ksnr_conn = NULL;
843 conn->ksnc_route = NULL;
845 ksocknal_put_route (route); /* drop conn's ref on route */
846 ksocknal_put_conn (conn); /* drop route's ref on conn */
849 /* ksnd_deathrow_conns takes over peer's ref */
850 list_del (&conn->ksnc_list);
852 if (list_empty (&peer->ksnp_conns)) {
853 /* No more connections to this peer */
855 peer->ksnp_error = error; /* stash last conn close reason */
857 if (list_empty (&peer->ksnp_routes)) {
858 /* I've just closed last conn belonging to a
859 * non-autoconnecting peer */
860 ksocknal_unlink_peer_locked (peer);
864 spin_lock (&ksocknal_data.ksnd_reaper_lock);
866 list_add_tail (&conn->ksnc_list, &ksocknal_data.ksnd_deathrow_conns);
867 if (waitqueue_active (&ksocknal_data.ksnd_reaper_waitq))
868 wake_up (&ksocknal_data.ksnd_reaper_waitq);
870 spin_unlock (&ksocknal_data.ksnd_reaper_lock);
874 ksocknal_close_conn_unlocked (ksock_conn_t *conn, int why)
879 write_lock_irqsave (&ksocknal_data.ksnd_global_lock, flags);
881 if (!conn->ksnc_closing) {
883 ksocknal_close_conn_locked (conn, why);
886 write_unlock_irqrestore (&ksocknal_data.ksnd_global_lock, flags);
892 ksocknal_terminate_conn (ksock_conn_t *conn)
894 /* This gets called by the reaper (guaranteed thread context) to
895 * disengage the socket from its callbacks and close it.
896 * ksnc_refcount will eventually hit zero, and then the reaper will
899 ksock_peer_t *peer = conn->ksnc_peer;
904 /* serialise with callbacks */
905 write_lock_irqsave (&ksocknal_data.ksnd_global_lock, flags);
907 LASSERT (conn->ksnc_closing);
909 /* Remove conn's network callbacks.
910 * NB I _have_ to restore the callback, rather than storing a noop,
911 * since the socket could survive past this module being unloaded!! */
912 conn->ksnc_sock->sk->sk_data_ready = conn->ksnc_saved_data_ready;
913 conn->ksnc_sock->sk->sk_write_space = conn->ksnc_saved_write_space;
915 /* A callback could be in progress already; they hold a read lock
916 * on ksnd_global_lock (to serialise with me) and NOOP if
917 * sk_user_data is NULL. */
918 conn->ksnc_sock->sk->sk_user_data = NULL;
920 conn->ksnc_scheduler->kss_nconns--;
922 if (peer->ksnp_error != 0) {
923 /* peer's last conn closed in error */
924 LASSERT (list_empty (&peer->ksnp_conns));
926 /* convert peer's last-known-alive timestamp from jiffies */
927 do_gettimeofday (&now);
928 then = now.tv_sec - (jiffies - peer->ksnp_last_alive)/HZ;
932 write_unlock_irqrestore (&ksocknal_data.ksnd_global_lock, flags);
934 /* The socket is closed on the final put; either here, or in
935 * ksocknal_{send,recv}msg(). Since we set up the linger2 option
936 * when the connection was established, this will close the socket
937 * immediately, aborting anything buffered in it. Any hung
938 * zero-copy transmits will therefore complete in finite time. */
939 ksocknal_putconnsock (conn);
942 kpr_notify (&ksocknal_data.ksnd_router, peer->ksnp_nid,
947 ksocknal_destroy_conn (ksock_conn_t *conn)
949 /* Final coup-de-grace of the reaper */
950 CDEBUG (D_NET, "connection %p\n", conn);
952 LASSERT (atomic_read (&conn->ksnc_refcount) == 0);
953 LASSERT (conn->ksnc_route == NULL);
954 LASSERT (!conn->ksnc_tx_scheduled);
955 LASSERT (!conn->ksnc_rx_scheduled);
957 /* complete queued packets */
958 while (!list_empty (&conn->ksnc_tx_queue)) {
959 ksock_tx_t *tx = list_entry (conn->ksnc_tx_queue.next,
960 ksock_tx_t, tx_list);
962 CERROR ("Deleting packet type %d len %d ("LPX64"->"LPX64")\n",
963 NTOH__u32 (tx->tx_hdr->type),
964 NTOH__u32 (PTL_HDR_LENGTH(tx->tx_hdr)),
965 NTOH__u64 (tx->tx_hdr->src_nid),
966 NTOH__u64 (tx->tx_hdr->dest_nid));
968 list_del (&tx->tx_list);
969 ksocknal_tx_done (tx, 0);
972 /* complete current receive if any */
973 switch (conn->ksnc_rx_state) {
974 case SOCKNAL_RX_BODY:
975 lib_finalize (&ksocknal_lib, NULL, conn->ksnc_cookie);
977 case SOCKNAL_RX_BODY_FWD:
978 ksocknal_fmb_callback (conn->ksnc_cookie, -ECONNABORTED);
980 case SOCKNAL_RX_HEADER:
981 case SOCKNAL_RX_SLOP:
988 ksocknal_put_peer (conn->ksnc_peer);
990 PORTAL_FREE (conn, sizeof (*conn));
991 atomic_dec (&ksocknal_data.ksnd_nclosing_conns);
995 ksocknal_put_conn (ksock_conn_t *conn)
999 CDEBUG (D_OTHER, "putting conn[%p] -> "LPX64" (%d)\n",
1000 conn, conn->ksnc_peer->ksnp_nid,
1001 atomic_read (&conn->ksnc_refcount));
1003 LASSERT (atomic_read (&conn->ksnc_refcount) > 0);
1004 if (!atomic_dec_and_test (&conn->ksnc_refcount))
1007 spin_lock_irqsave (&ksocknal_data.ksnd_reaper_lock, flags);
1009 list_add (&conn->ksnc_list, &ksocknal_data.ksnd_zombie_conns);
1010 if (waitqueue_active (&ksocknal_data.ksnd_reaper_waitq))
1011 wake_up (&ksocknal_data.ksnd_reaper_waitq);
1013 spin_unlock_irqrestore (&ksocknal_data.ksnd_reaper_lock, flags);
1017 ksocknal_close_conn (ptl_nid_t nid, __u32 ipaddr)
1019 unsigned long flags;
1021 struct list_head *ctmp;
1022 struct list_head *cnxt;
1024 struct list_head *ptmp;
1025 struct list_head *pnxt;
1031 write_lock_irqsave (&ksocknal_data.ksnd_global_lock, flags);
1033 if (nid != PTL_NID_ANY)
1034 lo = hi = ksocknal_nid2peerlist(nid) - ksocknal_data.ksnd_peers;
1037 hi = ksocknal_data.ksnd_peer_hash_size - 1;
1040 for (i = lo; i <= hi; i++) {
1041 list_for_each_safe (ptmp, pnxt, &ksocknal_data.ksnd_peers[i]) {
1043 peer = list_entry (ptmp, ksock_peer_t, ksnp_list);
1045 if (!(nid == PTL_NID_ANY || nid == peer->ksnp_nid))
1048 list_for_each_safe (ctmp, cnxt, &peer->ksnp_conns) {
1050 conn = list_entry (ctmp, ksock_conn_t,
1053 if (!(ipaddr == 0 ||
1054 conn->ksnc_ipaddr == ipaddr))
1058 ksocknal_close_conn_locked (conn, 0);
1063 write_unlock_irqrestore (&ksocknal_data.ksnd_global_lock, flags);
1069 ksocknal_notify (void *arg, ptl_nid_t gw_nid, int alive)
1071 /* The router is telling me she's been notified of a change in
1072 * gateway state.... */
1074 CDEBUG (D_NET, "gw "LPX64" %s\n", gw_nid, alive ? "up" : "down");
1077 /* If the gateway crashed, close all open connections... */
1078 ksocknal_close_conn (gw_nid, 0);
1082 /* ...otherwise do nothing. We can only establish new connections
1083 * if we have autroutes, and these connect on demand. */
1086 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
1087 struct tcp_opt *sock2tcp_opt(struct sock *sk)
1089 return &(sk->tp_pinfo.af_tcp);
1092 struct tcp_opt *sock2tcp_opt(struct sock *sk)
1094 struct tcp_sock *s = (struct tcp_sock *)sk;
1100 ksocknal_push_conn (ksock_conn_t *conn)
1109 rc = ksocknal_getconnsock (conn);
1110 if (rc != 0) /* being shut down */
1113 sk = conn->ksnc_sock->sk;
1114 tp = sock2tcp_opt(sk);
1117 nonagle = tp->nonagle;
1124 rc = sk->sk_prot->setsockopt (sk, SOL_TCP, TCP_NODELAY,
1125 (char *)&val, sizeof (val));
1131 tp->nonagle = nonagle;
1134 ksocknal_putconnsock (conn);
1138 ksocknal_push_peer (ksock_peer_t *peer)
1142 struct list_head *tmp;
1145 for (index = 0; ; index++) {
1146 read_lock (&ksocknal_data.ksnd_global_lock);
1151 list_for_each (tmp, &peer->ksnp_conns) {
1153 conn = list_entry (tmp, ksock_conn_t, ksnc_list);
1154 atomic_inc (&conn->ksnc_refcount);
1159 read_unlock (&ksocknal_data.ksnd_global_lock);
1164 ksocknal_push_conn (conn);
1165 ksocknal_put_conn (conn);
1170 ksocknal_push (ptl_nid_t nid)
1173 struct list_head *tmp;
1179 if (nid != PTL_NID_ANY) {
1180 peer = ksocknal_get_peer (nid);
1184 ksocknal_push_peer (peer);
1185 ksocknal_put_peer (peer);
1190 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
1191 for (j = 0; ; j++) {
1192 read_lock (&ksocknal_data.ksnd_global_lock);
1197 list_for_each (tmp, &ksocknal_data.ksnd_peers[i]) {
1199 peer = list_entry(tmp, ksock_peer_t,
1201 atomic_inc (&peer->ksnp_refcount);
1206 read_unlock (&ksocknal_data.ksnd_global_lock);
1210 ksocknal_push_peer (peer);
1211 ksocknal_put_peer (peer);
1221 ksocknal_cmd(struct portal_ioctl_data * data, void * private)
1225 LASSERT (data != NULL);
1227 switch(data->ioc_nal_cmd) {
1228 case NAL_CMD_GET_AUTOCONN: {
1229 ksock_route_t *route = ksocknal_get_route_by_idx (data->ioc_count);
1235 data->ioc_nid = route->ksnr_peer->ksnp_nid;
1236 data->ioc_id = route->ksnr_ipaddr;
1237 data->ioc_misc = route->ksnr_port;
1238 data->ioc_count = route->ksnr_generation;
1239 data->ioc_size = route->ksnr_buffer_size;
1240 data->ioc_wait = route->ksnr_sharecount;
1241 data->ioc_flags = (route->ksnr_nonagel ? 1 : 0) |
1242 (route->ksnr_xchange_nids ? 2 : 0) |
1243 (route->ksnr_irq_affinity ? 4 : 0) |
1244 (route->ksnr_eager ? 8 : 0);
1245 ksocknal_put_route (route);
1249 case NAL_CMD_ADD_AUTOCONN: {
1250 rc = ksocknal_add_route (data->ioc_nid, data->ioc_id,
1251 data->ioc_misc, data->ioc_size,
1252 (data->ioc_flags & 0x01) != 0,
1253 (data->ioc_flags & 0x02) != 0,
1254 (data->ioc_flags & 0x04) != 0,
1255 (data->ioc_flags & 0x08) != 0,
1256 (data->ioc_flags & 0x10) != 0);
1259 case NAL_CMD_DEL_AUTOCONN: {
1260 rc = ksocknal_del_route (data->ioc_nid, data->ioc_id,
1261 (data->ioc_flags & 1) != 0,
1262 (data->ioc_flags & 2) != 0);
1265 case NAL_CMD_GET_CONN: {
1266 ksock_conn_t *conn = ksocknal_get_conn_by_idx (data->ioc_count);
1272 data->ioc_nid = conn->ksnc_peer->ksnp_nid;
1273 data->ioc_id = conn->ksnc_ipaddr;
1274 data->ioc_misc = conn->ksnc_port;
1275 ksocknal_put_conn (conn);
1279 case NAL_CMD_REGISTER_PEER_FD: {
1280 struct socket *sock = sockfd_lookup (data->ioc_fd, &rc);
1283 rc = ksocknal_create_conn (data->ioc_nid, NULL,
1284 sock, data->ioc_flags);
1290 case NAL_CMD_CLOSE_CONNECTION: {
1291 rc = ksocknal_close_conn (data->ioc_nid, data->ioc_id);
1294 case NAL_CMD_REGISTER_MYNID: {
1295 rc = ksocknal_set_mynid (data->ioc_nid);
1298 case NAL_CMD_PUSH_CONNECTION: {
1299 rc = ksocknal_push (data->ioc_nid);
1308 ksocknal_free_buffers (void)
1310 if (ksocknal_data.ksnd_fmbs != NULL) {
1311 ksock_fmb_t *fmb = (ksock_fmb_t *)ksocknal_data.ksnd_fmbs;
1316 i < (SOCKNAL_SMALL_FWD_NMSGS + SOCKNAL_LARGE_FWD_NMSGS);
1318 for (j = 0; j < fmb->fmb_npages; j++)
1319 if (fmb->fmb_pages[j] != NULL)
1320 __free_page (fmb->fmb_pages[j]);
1322 PORTAL_FREE (ksocknal_data.ksnd_fmbs,
1323 sizeof (ksock_fmb_t) * (SOCKNAL_SMALL_FWD_NMSGS +
1324 SOCKNAL_LARGE_FWD_NMSGS));
1327 LASSERT (ksocknal_data.ksnd_active_ltxs == 0);
1328 if (ksocknal_data.ksnd_ltxs != NULL)
1329 PORTAL_FREE (ksocknal_data.ksnd_ltxs,
1330 sizeof (ksock_ltx_t) * (SOCKNAL_NLTXS +
1331 SOCKNAL_NNBLK_LTXS));
1333 if (ksocknal_data.ksnd_schedulers != NULL)
1334 PORTAL_FREE (ksocknal_data.ksnd_schedulers,
1335 sizeof (ksock_sched_t) * SOCKNAL_N_SCHED);
1337 PORTAL_FREE (ksocknal_data.ksnd_peers,
1338 sizeof (struct list_head) *
1339 ksocknal_data.ksnd_peer_hash_size);
1343 ksocknal_module_fini (void)
1347 CDEBUG(D_MALLOC, "before NAL cleanup: kmem %d\n",
1348 atomic_read (&portal_kmemory));
1350 switch (ksocknal_data.ksnd_init) {
1354 case SOCKNAL_INIT_ALL:
1356 if (ksocknal_data.ksnd_sysctl != NULL)
1357 unregister_sysctl_table (ksocknal_data.ksnd_sysctl);
1359 kportal_nal_unregister(SOCKNAL);
1360 PORTAL_SYMBOL_UNREGISTER (ksocknal_ni);
1363 case SOCKNAL_INIT_PTL:
1364 PtlNIFini(ksocknal_ni);
1365 lib_fini(&ksocknal_lib);
1368 case SOCKNAL_INIT_DATA:
1369 /* Module refcount only gets to zero when all peers
1370 * have been closed so all lists must be empty */
1371 LASSERT (atomic_read (&ksocknal_data.ksnd_npeers) == 0);
1372 LASSERT (ksocknal_data.ksnd_peers != NULL);
1373 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
1374 LASSERT (list_empty (&ksocknal_data.ksnd_peers[i]));
1376 LASSERT (list_empty (&ksocknal_data.ksnd_zombie_conns));
1377 LASSERT (list_empty (&ksocknal_data.ksnd_autoconnectd_routes));
1378 LASSERT (list_empty (&ksocknal_data.ksnd_small_fmp.fmp_blocked_conns));
1379 LASSERT (list_empty (&ksocknal_data.ksnd_large_fmp.fmp_blocked_conns));
1381 if (ksocknal_data.ksnd_schedulers != NULL)
1382 for (i = 0; i < SOCKNAL_N_SCHED; i++) {
1383 ksock_sched_t *kss =
1384 &ksocknal_data.ksnd_schedulers[i];
1386 LASSERT (list_empty (&kss->kss_tx_conns));
1387 LASSERT (list_empty (&kss->kss_rx_conns));
1388 LASSERT (kss->kss_nconns == 0);
1391 /* stop router calling me */
1392 kpr_shutdown (&ksocknal_data.ksnd_router);
1394 /* flag threads to terminate; wake and wait for them to die */
1395 ksocknal_data.ksnd_shuttingdown = 1;
1396 wake_up_all (&ksocknal_data.ksnd_autoconnectd_waitq);
1397 wake_up_all (&ksocknal_data.ksnd_reaper_waitq);
1399 for (i = 0; i < SOCKNAL_N_SCHED; i++)
1400 wake_up_all(&ksocknal_data.ksnd_schedulers[i].kss_waitq);
1402 while (atomic_read (&ksocknal_data.ksnd_nthreads) != 0) {
1403 CDEBUG (D_NET, "waitinf for %d threads to terminate\n",
1404 atomic_read (&ksocknal_data.ksnd_nthreads));
1405 set_current_state (TASK_UNINTERRUPTIBLE);
1406 schedule_timeout (HZ);
1409 kpr_deregister (&ksocknal_data.ksnd_router);
1411 ksocknal_free_buffers();
1414 case SOCKNAL_INIT_NOTHING:
1418 CDEBUG(D_MALLOC, "after NAL cleanup: kmem %d\n",
1419 atomic_read (&portal_kmemory));
1421 printk(KERN_INFO "Routing socket NAL unloaded (final mem %d)\n",
1422 atomic_read(&portal_kmemory));
1427 ksocknal_module_init (void)
1429 int pkmem = atomic_read(&portal_kmemory);
1434 /* packet descriptor must fit in a router descriptor's scratchpad */
1435 LASSERT(sizeof (ksock_tx_t) <= sizeof (kprfd_scratch_t));
1436 /* the following must be sizeof(int) for proc_dointvec() */
1437 LASSERT(sizeof (ksocknal_data.ksnd_io_timeout) == sizeof (int));
1438 LASSERT(sizeof (ksocknal_data.ksnd_eager_ack) == sizeof (int));
1440 LASSERT (ksocknal_data.ksnd_init == SOCKNAL_INIT_NOTHING);
1442 ksocknal_api.forward = ksocknal_api_forward;
1443 ksocknal_api.shutdown = ksocknal_api_shutdown;
1444 ksocknal_api.yield = ksocknal_api_yield;
1445 ksocknal_api.validate = NULL; /* our api validate is a NOOP */
1446 ksocknal_api.lock = ksocknal_api_lock;
1447 ksocknal_api.unlock = ksocknal_api_unlock;
1448 ksocknal_api.nal_data = &ksocknal_data;
1450 ksocknal_lib.nal_data = &ksocknal_data;
1452 memset (&ksocknal_data, 0, sizeof (ksocknal_data)); /* zero pointers */
1454 ksocknal_data.ksnd_io_timeout = SOCKNAL_IO_TIMEOUT;
1455 ksocknal_data.ksnd_eager_ack = SOCKNAL_EAGER_ACK;
1457 ksocknal_data.ksnd_zc_min_frag = SOCKNAL_ZC_MIN_FRAG;
1460 ksocknal_data.ksnd_peer_hash_size = SOCKNAL_PEER_HASH_SIZE;
1461 PORTAL_ALLOC (ksocknal_data.ksnd_peers,
1462 sizeof (struct list_head) * ksocknal_data.ksnd_peer_hash_size);
1463 if (ksocknal_data.ksnd_peers == NULL)
1466 for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++)
1467 INIT_LIST_HEAD(&ksocknal_data.ksnd_peers[i]);
1469 rwlock_init(&ksocknal_data.ksnd_global_lock);
1471 ksocknal_data.ksnd_nal_cb = &ksocknal_lib;
1472 spin_lock_init (&ksocknal_data.ksnd_nal_cb_lock);
1474 spin_lock_init(&ksocknal_data.ksnd_small_fmp.fmp_lock);
1475 INIT_LIST_HEAD(&ksocknal_data.ksnd_small_fmp.fmp_idle_fmbs);
1476 INIT_LIST_HEAD(&ksocknal_data.ksnd_small_fmp.fmp_blocked_conns);
1478 spin_lock_init(&ksocknal_data.ksnd_large_fmp.fmp_lock);
1479 INIT_LIST_HEAD(&ksocknal_data.ksnd_large_fmp.fmp_idle_fmbs);
1480 INIT_LIST_HEAD(&ksocknal_data.ksnd_large_fmp.fmp_blocked_conns);
1482 spin_lock_init(&ksocknal_data.ksnd_idle_ltx_lock);
1483 INIT_LIST_HEAD(&ksocknal_data.ksnd_idle_nblk_ltx_list);
1484 INIT_LIST_HEAD(&ksocknal_data.ksnd_idle_ltx_list);
1485 init_waitqueue_head(&ksocknal_data.ksnd_idle_ltx_waitq);
1487 spin_lock_init (&ksocknal_data.ksnd_reaper_lock);
1488 INIT_LIST_HEAD (&ksocknal_data.ksnd_zombie_conns);
1489 INIT_LIST_HEAD (&ksocknal_data.ksnd_deathrow_conns);
1490 init_waitqueue_head(&ksocknal_data.ksnd_reaper_waitq);
1492 spin_lock_init (&ksocknal_data.ksnd_autoconnectd_lock);
1493 INIT_LIST_HEAD (&ksocknal_data.ksnd_autoconnectd_routes);
1494 init_waitqueue_head(&ksocknal_data.ksnd_autoconnectd_waitq);
1496 /* NB memset above zeros whole of ksocknal_data, including
1497 * ksocknal_data.ksnd_irqinfo[all].ksni_valid */
1499 /* flag lists/ptrs/locks initialised */
1500 ksocknal_data.ksnd_init = SOCKNAL_INIT_DATA;
1502 PORTAL_ALLOC(ksocknal_data.ksnd_schedulers,
1503 sizeof(ksock_sched_t) * SOCKNAL_N_SCHED);
1504 if (ksocknal_data.ksnd_schedulers == NULL) {
1505 ksocknal_module_fini ();
1509 for (i = 0; i < SOCKNAL_N_SCHED; i++) {
1510 ksock_sched_t *kss = &ksocknal_data.ksnd_schedulers[i];
1512 spin_lock_init (&kss->kss_lock);
1513 INIT_LIST_HEAD (&kss->kss_rx_conns);
1514 INIT_LIST_HEAD (&kss->kss_tx_conns);
1516 INIT_LIST_HEAD (&kss->kss_zctxdone_list);
1518 init_waitqueue_head (&kss->kss_waitq);
1521 CDEBUG (D_MALLOC, "ltx "LPSZ", total "LPSZ"\n", sizeof (ksock_ltx_t),
1522 sizeof (ksock_ltx_t) * (SOCKNAL_NLTXS + SOCKNAL_NNBLK_LTXS));
1524 PORTAL_ALLOC(ksocknal_data.ksnd_ltxs,
1525 sizeof(ksock_ltx_t) * (SOCKNAL_NLTXS +SOCKNAL_NNBLK_LTXS));
1526 if (ksocknal_data.ksnd_ltxs == NULL) {
1527 ksocknal_module_fini ();
1531 /* Deterministic bugs please */
1532 memset (ksocknal_data.ksnd_ltxs, 0xeb,
1533 sizeof (ksock_ltx_t) * (SOCKNAL_NLTXS + SOCKNAL_NNBLK_LTXS));
1535 for (i = 0; i < SOCKNAL_NLTXS + SOCKNAL_NNBLK_LTXS; i++) {
1536 ksock_ltx_t *ltx = &((ksock_ltx_t *)ksocknal_data.ksnd_ltxs)[i];
1538 ltx->ltx_tx.tx_hdr = <x->ltx_hdr;
1539 ltx->ltx_idle = i < SOCKNAL_NLTXS ?
1540 &ksocknal_data.ksnd_idle_ltx_list :
1541 &ksocknal_data.ksnd_idle_nblk_ltx_list;
1542 list_add (<x->ltx_tx.tx_list, ltx->ltx_idle);
1545 rc = PtlNIInit(ksocknal_init, 32, 4, 0, &ksocknal_ni);
1547 CERROR("ksocknal: PtlNIInit failed: error %d\n", rc);
1548 ksocknal_module_fini ();
1551 PtlNIDebug(ksocknal_ni, ~0);
1553 ksocknal_data.ksnd_init = SOCKNAL_INIT_PTL; // flag PtlNIInit() called
1555 for (i = 0; i < SOCKNAL_N_SCHED; i++) {
1556 rc = ksocknal_thread_start (ksocknal_scheduler,
1557 &ksocknal_data.ksnd_schedulers[i]);
1559 CERROR("Can't spawn socknal scheduler[%d]: %d\n",
1561 ksocknal_module_fini ();
1566 for (i = 0; i < SOCKNAL_N_AUTOCONNECTD; i++) {
1567 rc = ksocknal_thread_start (ksocknal_autoconnectd, (void *)((long)i));
1569 CERROR("Can't spawn socknal autoconnectd: %d\n", rc);
1570 ksocknal_module_fini ();
1575 rc = ksocknal_thread_start (ksocknal_reaper, NULL);
1577 CERROR ("Can't spawn socknal reaper: %d\n", rc);
1578 ksocknal_module_fini ();
1582 rc = kpr_register(&ksocknal_data.ksnd_router,
1583 &ksocknal_router_interface);
1585 CDEBUG(D_NET, "Can't initialise routing interface "
1586 "(rc = %d): not routing\n", rc);
1588 /* Only allocate forwarding buffers if I'm on a gateway */
1590 PORTAL_ALLOC(ksocknal_data.ksnd_fmbs,
1591 sizeof(ksock_fmb_t) * (SOCKNAL_SMALL_FWD_NMSGS +
1592 SOCKNAL_LARGE_FWD_NMSGS));
1593 if (ksocknal_data.ksnd_fmbs == NULL) {
1594 ksocknal_module_fini ();
1598 /* NULL out buffer pointers etc */
1599 memset(ksocknal_data.ksnd_fmbs, 0,
1600 sizeof(ksock_fmb_t) * (SOCKNAL_SMALL_FWD_NMSGS +
1601 SOCKNAL_LARGE_FWD_NMSGS));
1603 for (i = 0; i < (SOCKNAL_SMALL_FWD_NMSGS +
1604 SOCKNAL_LARGE_FWD_NMSGS); i++) {
1606 &((ksock_fmb_t *)ksocknal_data.ksnd_fmbs)[i];
1608 if (i < SOCKNAL_SMALL_FWD_NMSGS) {
1609 fmb->fmb_npages = SOCKNAL_SMALL_FWD_PAGES;
1610 fmb->fmb_pool = &ksocknal_data.ksnd_small_fmp;
1612 fmb->fmb_npages = SOCKNAL_LARGE_FWD_PAGES;
1613 fmb->fmb_pool = &ksocknal_data.ksnd_large_fmp;
1616 LASSERT (fmb->fmb_npages > 0);
1617 for (j = 0; j < fmb->fmb_npages; j++) {
1618 fmb->fmb_pages[j] = alloc_page(GFP_KERNEL);
1620 if (fmb->fmb_pages[j] == NULL) {
1621 ksocknal_module_fini ();
1625 LASSERT(page_address (fmb->fmb_pages[j]) !=
1629 list_add(&fmb->fmb_list, &fmb->fmb_pool->fmp_idle_fmbs);
1633 rc = kportal_nal_register(SOCKNAL, &ksocknal_cmd, NULL);
1635 CERROR ("Can't initialise command interface (rc = %d)\n", rc);
1636 ksocknal_module_fini ();
1640 PORTAL_SYMBOL_REGISTER(ksocknal_ni);
1642 #ifdef CONFIG_SYSCTL
1643 /* Press on regardless even if registering sysctl doesn't work */
1644 ksocknal_data.ksnd_sysctl = register_sysctl_table (ksocknal_top_ctl_table, 0);
1646 /* flag everything initialised */
1647 ksocknal_data.ksnd_init = SOCKNAL_INIT_ALL;
1649 printk(KERN_INFO "Routing socket NAL loaded (Routing %s, initial "
1651 kpr_routing (&ksocknal_data.ksnd_router) ?
1652 "enabled" : "disabled", pkmem);
1657 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1658 MODULE_DESCRIPTION("Kernel TCP Socket NAL v0.01");
1659 MODULE_LICENSE("GPL");
1661 module_init(ksocknal_module_init);
1662 module_exit(ksocknal_module_fini);
1664 EXPORT_SYMBOL (ksocknal_ni);