1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2004 Cluster File Systems, Inc.
5 * Author: Eric Barton <eric@bartonsoftware.com>
7 * This file is part of Lustre, http://www.lustre.org.
9 * Lustre is free software; you can redistribute it and/or
10 * modify it under the terms of version 2 of the GNU General Public
11 * License as published by the Free Software Foundation.
13 * Lustre is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with Lustre; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 ptl_handle_ni_t kranal_ni;
28 kra_data_t kranal_data;
29 kra_tunables_t kranal_tunables;
32 #define RANAL_SYSCTL_TIMEOUT 1
33 #define RANAL_SYSCTL_LISTENER_TIMEOUT 2
34 #define RANAL_SYSCTL_BACKLOG 3
35 #define RANAL_SYSCTL_PORT 4
36 #define RANAL_SYSCTL_MAX_IMMEDIATE 5
38 #define RANAL_SYSCTL 202
40 static ctl_table kranal_ctl_table[] = {
41 {RANAL_SYSCTL_TIMEOUT, "timeout",
42 &kranal_tunables.kra_timeout, sizeof(int),
43 0644, NULL, &proc_dointvec},
44 {RANAL_SYSCTL_LISTENER_TIMEOUT, "listener_timeout",
45 &kranal_tunables.kra_listener_timeout, sizeof(int),
46 0644, NULL, &proc_dointvec},
47 {RANAL_SYSCTL_BACKLOG, "backlog",
48 &kranal_tunables.kra_backlog, sizeof(int),
49 0644, NULL, kranal_listener_procint},
50 {RANAL_SYSCTL_PORT, "port",
51 &kranal_tunables.kra_port, sizeof(int),
52 0644, NULL, kranal_listener_procint},
53 {RANAL_SYSCTL_MAX_IMMEDIATE, "max_immediate",
54 &kranal_tunables.kra_max_immediate, sizeof(int),
55 0644, NULL, &proc_dointvec},
59 static ctl_table kranal_top_ctl_table[] = {
60 {RANAL_SYSCTL, "ranal", NULL, 0, 0555, kranal_ctl_table},
66 kranal_sock_write (struct socket *sock, void *buffer, int nob)
69 mm_segment_t oldmm = get_fs();
81 .msg_flags = MSG_DONTWAIT
84 /* We've set up the socket's send buffer to be large enough for
85 * everything we send, so a single non-blocking send should
86 * complete without error. */
89 rc = sock_sendmsg(sock, &msg, iov.iov_len);
96 kranal_sock_read (struct socket *sock, void *buffer, int nob, int timeout)
99 mm_segment_t oldmm = get_fs();
100 long ticks = timeout * HZ;
112 struct msghdr msg = {
122 /* Set receive timeout to remaining time */
123 tv = (struct timeval) {
124 .tv_sec = ticks / HZ,
125 .tv_usec = ((ticks % HZ) * 1000000) / HZ
128 rc = sock_setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO,
129 (char *)&tv, sizeof(tv));
132 CERROR("Can't set socket recv timeout %d: %d\n",
139 rc = sock_recvmsg(sock, &msg, iov.iov_len, 0);
140 ticks -= jiffies - then;
147 return -ECONNABORTED;
149 buffer = ((char *)buffer) + rc;
161 kranal_create_sock(struct socket **sockp)
166 mm_segment_t oldmm = get_fs();
168 rc = sock_create(PF_INET, SOCK_STREAM, 0, &sock);
170 CERROR("Can't create socket: %d\n", rc);
174 /* Ensure sending connection info doesn't block */
175 option = 2 * sizeof(kra_connreq_t);
177 rc = sock_setsockopt(sock, SOL_SOCKET, SO_SNDBUF,
178 (char *)&option, sizeof(option));
181 CERROR("Can't set send buffer %d: %d\n", option, rc);
187 rc = sock_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
188 (char *)&option, sizeof(option));
191 CERROR("Can't set SO_REUSEADDR: %d\n", rc);
204 kranal_pause(int ticks)
206 set_current_state(TASK_UNINTERRUPTIBLE);
207 schedule_timeout(ticks);
211 kranal_pack_connreq(kra_connreq_t *connreq, kra_conn_t *conn)
215 memset(connreq, 0, sizeof(*connreq));
217 connreq->racr_magic = RANAL_MSG_MAGIC;
218 connreq->racr_version = RANAL_MSG_VERSION;
219 connreq->racr_devid = conn->rac_device->rad_id;
220 connreq->racr_nid = kranal_lib.libnal_ni.ni_pid.nid;
221 connreq->racr_peerstamp = kranal_data.kra_peerstamp;
222 connreq->racr_connstamp = conn->rac_my_connstamp;
223 connreq->racr_timeout = conn->rac_timeout;
225 rrc = RapkGetRiParams(conn->rac_rihandle, &connreq->racr_riparams);
226 LASSERT(rrc == RAP_SUCCESS);
230 kranal_recv_connreq(struct socket *sock, kra_connreq_t *connreq, int timeout)
234 rc = kranal_sock_read(sock, connreq, sizeof(*connreq), timeout);
236 CERROR("Read failed: %d\n", rc);
240 if (connreq->racr_magic != RANAL_MSG_MAGIC) {
241 if (__swab32(connreq->racr_magic) != RANAL_MSG_MAGIC) {
242 CERROR("Unexpected magic %08x\n", connreq->racr_magic);
246 __swab32s(&connreq->racr_magic);
247 __swab16s(&connreq->racr_version);
248 __swab16s(&connreq->racr_devid);
249 __swab64s(&connreq->racr_nid);
250 __swab64s(&connreq->racr_peerstamp);
251 __swab64s(&connreq->racr_connstamp);
252 __swab32s(&connreq->racr_timeout);
254 __swab32s(&connreq->racr_riparams.FmaDomainHndl);
255 __swab32s(&connreq->racr_riparams.RcvCqHndl);
256 __swab32s(&connreq->racr_riparams.PTag);
257 __swab32s(&connreq->racr_riparams.CompletionCookie);
260 if (connreq->racr_version != RANAL_MSG_VERSION) {
261 CERROR("Unexpected version %d\n", connreq->racr_version);
265 if (connreq->racr_nid == PTL_NID_ANY) {
266 CERROR("Received PTL_NID_ANY\n");
270 if (connreq->racr_timeout < RANAL_MIN_TIMEOUT) {
271 CERROR("Received timeout %d < MIN %d\n",
272 connreq->racr_timeout, RANAL_MIN_TIMEOUT);
280 kranal_close_stale_conns_locked (kra_peer_t *peer, kra_conn_t *newconn)
283 struct list_head *ctmp;
284 struct list_head *cnxt;
288 loopback = peer->rap_nid == kranal_lib.libnal_ni.ni_pid.nid;
290 list_for_each_safe (ctmp, cnxt, &peer->rap_conns) {
291 conn = list_entry(ctmp, kra_conn_t, rac_list);
296 if (conn->rac_peerstamp != newconn->rac_peerstamp) {
297 CDEBUG(D_NET, "Closing stale conn nid:"LPX64
298 " peerstamp:"LPX64"("LPX64")\n", peer->rap_nid,
299 conn->rac_peerstamp, newconn->rac_peerstamp);
300 LASSERT (conn->rac_peerstamp < newconn->rac_peerstamp);
302 kranal_close_conn_locked(conn, -ESTALE);
306 if (conn->rac_device != newconn->rac_device)
310 newconn->rac_my_connstamp == conn->rac_peer_connstamp &&
311 newconn->rac_peer_connstamp == conn->rac_my_connstamp)
314 LASSERT (conn->rac_peer_connstamp < newconn->rac_peer_connstamp);
316 CDEBUG(D_NET, "Closing stale conn nid:"LPX64
317 " connstamp:"LPX64"("LPX64")\n", peer->rap_nid,
318 conn->rac_peer_connstamp, newconn->rac_peer_connstamp);
321 kranal_close_conn_locked(conn, -ESTALE);
328 kranal_conn_isdup_locked(kra_peer_t *peer, kra_conn_t *newconn)
331 struct list_head *tmp;
334 loopback = peer->rap_nid == kranal_lib.libnal_ni.ni_pid.nid;
336 list_for_each(tmp, &peer->rap_conns) {
337 conn = list_entry(tmp, kra_conn_t, rac_list);
339 /* 'newconn' is from an earlier version of 'peer'!!! */
340 if (newconn->rac_peerstamp < conn->rac_peerstamp)
343 /* 'conn' is from an earlier version of 'peer': it will be
344 * removed when we cull stale conns later on... */
345 if (newconn->rac_peerstamp > conn->rac_peerstamp)
348 /* Different devices are OK */
349 if (conn->rac_device != newconn->rac_device)
352 /* It's me connecting to myself */
354 newconn->rac_my_connstamp == conn->rac_peer_connstamp &&
355 newconn->rac_peer_connstamp == conn->rac_my_connstamp)
358 /* 'newconn' is an earlier connection from 'peer'!!! */
359 if (newconn->rac_peer_connstamp < conn->rac_peer_connstamp)
362 /* 'conn' is an earlier connection from 'peer': it will be
363 * removed when we cull stale conns later on... */
364 if (newconn->rac_peer_connstamp > conn->rac_peer_connstamp)
367 /* 'newconn' has the SAME connection stamp; 'peer' isn't
368 * playing the game... */
376 kranal_set_conn_uniqueness (kra_conn_t *conn)
380 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
382 conn->rac_my_connstamp = kranal_data.kra_connstamp++;
384 do { /* allocate a unique cqid */
385 conn->rac_cqid = kranal_data.kra_next_cqid++;
386 } while (kranal_cqid2conn_locked(conn->rac_cqid) != NULL);
389 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
393 kranal_create_conn(kra_conn_t **connp, kra_device_t *dev)
398 LASSERT (!in_interrupt());
399 PORTAL_ALLOC(conn, sizeof(*conn));
404 memset(conn, 0, sizeof(*conn));
405 atomic_set(&conn->rac_refcount, 1);
406 INIT_LIST_HEAD(&conn->rac_list);
407 INIT_LIST_HEAD(&conn->rac_hashlist);
408 INIT_LIST_HEAD(&conn->rac_schedlist);
409 INIT_LIST_HEAD(&conn->rac_fmaq);
410 INIT_LIST_HEAD(&conn->rac_rdmaq);
411 INIT_LIST_HEAD(&conn->rac_replyq);
412 spin_lock_init(&conn->rac_lock);
414 kranal_set_conn_uniqueness(conn);
416 conn->rac_timeout = MAX(kranal_tunables.kra_timeout, RANAL_MIN_TIMEOUT);
417 kranal_update_reaper_timeout(conn->rac_timeout);
419 rrc = RapkCreateRi(dev->rad_handle, conn->rac_cqid,
421 dev->rad_rdma_cq, dev->rad_fma_cq,
422 &conn->rac_rihandle);
423 if (rrc != RAP_SUCCESS) {
424 CERROR("RapkCreateRi failed: %d\n", rrc);
425 PORTAL_FREE(conn, sizeof(*conn));
429 atomic_inc(&kranal_data.kra_nconns);
435 kranal_destroy_conn(kra_conn_t *conn)
439 LASSERT (!in_interrupt());
440 LASSERT (!conn->rac_scheduled);
441 LASSERT (list_empty(&conn->rac_list));
442 LASSERT (list_empty(&conn->rac_hashlist));
443 LASSERT (list_empty(&conn->rac_schedlist));
444 LASSERT (atomic_read(&conn->rac_refcount) == 0);
445 LASSERT (list_empty(&conn->rac_fmaq));
446 LASSERT (list_empty(&conn->rac_rdmaq));
447 LASSERT (list_empty(&conn->rac_replyq));
449 rrc = RapkDestroyRi(conn->rac_device->rad_handle,
451 LASSERT (rrc == RAP_SUCCESS);
453 if (conn->rac_peer != NULL)
454 kranal_peer_decref(conn->rac_peer);
456 PORTAL_FREE(conn, sizeof(*conn));
457 atomic_dec(&kranal_data.kra_nconns);
461 kranal_terminate_conn_locked (kra_conn_t *conn)
463 LASSERT (!in_interrupt());
464 LASSERT (conn->rac_state == RANAL_CONN_CLOSING);
465 LASSERT (!list_empty(&conn->rac_hashlist));
466 LASSERT (list_empty(&conn->rac_list));
468 /* Remove from conn hash table: no new callbacks */
469 list_del_init(&conn->rac_hashlist);
470 kranal_conn_decref(conn);
472 conn->rac_state = RANAL_CONN_CLOSED;
474 /* schedule to clear out all uncompleted comms in context of dev's
476 kranal_schedule_conn(conn);
480 kranal_close_conn_locked (kra_conn_t *conn, int error)
482 kra_peer_t *peer = conn->rac_peer;
484 CDEBUG(error == 0 ? D_NET : D_ERROR,
485 "closing conn to "LPX64": error %d\n", peer->rap_nid, error);
487 LASSERT (!in_interrupt());
488 LASSERT (conn->rac_state == RANAL_CONN_ESTABLISHED);
489 LASSERT (!list_empty(&conn->rac_hashlist));
490 LASSERT (!list_empty(&conn->rac_list));
492 list_del_init(&conn->rac_list);
494 if (list_empty(&peer->rap_conns) &&
495 peer->rap_persistence == 0) {
496 /* Non-persistent peer with no more conns... */
497 kranal_unlink_peer_locked(peer);
500 /* Reset RX timeout to ensure we wait for an incoming CLOSE for the
502 conn->rac_last_rx = jiffies;
505 conn->rac_state = RANAL_CONN_CLOSING;
506 kranal_schedule_conn(conn); /* schedule sending CLOSE */
508 kranal_conn_decref(conn); /* lose peer's ref */
512 kranal_close_conn (kra_conn_t *conn, int error)
517 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
519 if (conn->rac_state == RANAL_CONN_ESTABLISHED)
520 kranal_close_conn_locked(conn, error);
522 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
526 kranal_set_conn_params(kra_conn_t *conn, kra_connreq_t *connreq,
527 __u32 peer_ip, int peer_port)
531 rrc = RapkSetRiParams(conn->rac_rihandle, &connreq->racr_riparams);
532 if (rrc != RAP_SUCCESS) {
533 CERROR("Error setting riparams from %u.%u.%u.%u/%d: %d\n",
534 HIPQUAD(peer_ip), peer_port, rrc);
538 conn->rac_peerstamp = connreq->racr_peerstamp;
539 conn->rac_peer_connstamp = connreq->racr_connstamp;
540 conn->rac_keepalive = RANAL_TIMEOUT2KEEPALIVE(connreq->racr_timeout);
541 kranal_update_reaper_timeout(conn->rac_keepalive);
546 kranal_passive_conn_handshake (struct socket *sock,
547 ptl_nid_t *peer_nidp, kra_conn_t **connp)
549 struct sockaddr_in addr;
551 unsigned int peer_port;
552 kra_connreq_t connreq;
561 rc = sock->ops->getname(sock, (struct sockaddr *)&addr, &len, 2);
563 CERROR("Can't get peer's IP: %d\n", rc);
567 peer_ip = ntohl(addr.sin_addr.s_addr);
568 peer_port = ntohs(addr.sin_port);
570 if (peer_port >= 1024) {
571 CERROR("Refusing unprivileged connection from %u.%u.%u.%u/%d\n",
572 HIPQUAD(peer_ip), peer_port);
573 return -ECONNREFUSED;
576 rc = kranal_recv_connreq(sock, &connreq,
577 kranal_tunables.kra_listener_timeout);
579 CERROR("Can't rx connreq from %u.%u.%u.%u/%d: %d\n",
580 HIPQUAD(peer_ip), peer_port, rc);
584 peer_nid = connreq.racr_nid;
585 LASSERT (peer_nid != PTL_NID_ANY);
588 if (i == kranal_data.kra_ndevs) {
589 CERROR("Can't match dev %d from %u.%u.%u.%u/%d\n",
590 connreq.racr_devid, HIPQUAD(peer_ip), peer_port);
593 dev = &kranal_data.kra_devices[i];
594 if (dev->rad_id == connreq.racr_devid)
598 rc = kranal_create_conn(&conn, dev);
602 rc = kranal_set_conn_params(conn, &connreq, peer_ip, peer_port);
604 kranal_conn_decref(conn);
608 kranal_pack_connreq(&connreq, conn);
610 rc = kranal_sock_write(sock, &connreq, sizeof(connreq));
612 CERROR("Can't tx connreq to %u.%u.%u.%u/%d: %d\n",
613 HIPQUAD(peer_ip), peer_port, rc);
614 kranal_conn_decref(conn);
619 *peer_nidp = peer_nid;
624 ranal_connect_sock(kra_peer_t *peer, struct socket **sockp)
626 struct sockaddr_in locaddr;
627 struct sockaddr_in srvaddr;
632 for (port = 1023; port >= 512; port--) {
634 memset(&locaddr, 0, sizeof(locaddr));
635 locaddr.sin_family = AF_INET;
636 locaddr.sin_port = htons(port);
637 locaddr.sin_addr.s_addr = htonl(INADDR_ANY);
639 memset (&srvaddr, 0, sizeof (srvaddr));
640 srvaddr.sin_family = AF_INET;
641 srvaddr.sin_port = htons (peer->rap_port);
642 srvaddr.sin_addr.s_addr = htonl (peer->rap_ip);
644 rc = kranal_create_sock(&sock);
648 rc = sock->ops->bind(sock,
649 (struct sockaddr *)&locaddr, sizeof(locaddr));
653 if (rc == -EADDRINUSE) {
654 CDEBUG(D_NET, "Port %d already in use\n", port);
658 CERROR("Can't bind to reserved port %d: %d\n", port, rc);
662 rc = sock->ops->connect(sock,
663 (struct sockaddr *)&srvaddr, sizeof(srvaddr),
672 if (rc != -EADDRNOTAVAIL) {
673 CERROR("Can't connect port %d to %u.%u.%u.%u/%d: %d\n",
674 port, HIPQUAD(peer->rap_ip), peer->rap_port, rc);
678 CDEBUG(D_NET, "Port %d not available for %u.%u.%u.%u/%d\n",
679 port, HIPQUAD(peer->rap_ip), peer->rap_port);
683 return -EHOSTUNREACH;
688 kranal_active_conn_handshake(kra_peer_t *peer, kra_conn_t **connp)
690 kra_connreq_t connreq;
697 /* spread connections over all devices using both peer NIDs to ensure
698 * all nids use all devices */
699 idx = peer->rap_nid + kranal_lib.libnal_ni.ni_pid.nid;
700 dev = &kranal_data.kra_devices[idx % kranal_data.kra_ndevs];
702 rc = kranal_create_conn(&conn, dev);
706 kranal_pack_connreq(&connreq, conn);
708 rc = ranal_connect_sock(peer, &sock);
712 /* CAVEAT EMPTOR: the passive side receives with a SHORT rx timeout
713 * immediately after accepting a connection, so we connect and then
714 * send immediately. */
716 rc = kranal_sock_write(sock, &connreq, sizeof(connreq));
718 CERROR("Can't tx connreq to %u.%u.%u.%u/%d: %d\n",
719 HIPQUAD(peer->rap_ip), peer->rap_port, rc);
723 rc = kranal_recv_connreq(sock, &connreq, kranal_tunables.kra_timeout);
725 CERROR("Can't rx connreq from %u.%u.%u.%u/%d: %d\n",
726 HIPQUAD(peer->rap_ip), peer->rap_port, rc);
733 if (connreq.racr_nid != peer->rap_nid) {
734 CERROR("Unexpected nid from %u.%u.%u.%u/%d: "
735 "received "LPX64" expected "LPX64"\n",
736 HIPQUAD(peer->rap_ip), peer->rap_port,
737 connreq.racr_nid, peer->rap_nid);
741 if (connreq.racr_devid != dev->rad_id) {
742 CERROR("Unexpected device id from %u.%u.%u.%u/%d: "
743 "received %d expected %d\n",
744 HIPQUAD(peer->rap_ip), peer->rap_port,
745 connreq.racr_devid, dev->rad_id);
749 rc = kranal_set_conn_params(conn, &connreq,
750 peer->rap_ip, peer->rap_port);
760 kranal_conn_decref(conn);
765 kranal_conn_handshake (struct socket *sock, kra_peer_t *peer)
776 /* active: connd wants to connect to 'peer' */
777 LASSERT (peer != NULL);
778 LASSERT (peer->rap_connecting);
780 rc = kranal_active_conn_handshake(peer, &conn);
784 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
786 if (!kranal_peer_active(peer)) {
787 /* raced with peer getting unlinked */
788 write_unlock_irqrestore(&kranal_data.kra_global_lock,
790 kranal_conn_decref(conn);
794 peer_nid = peer->rap_nid;
797 /* passive: listener accepted 'sock' */
798 LASSERT (peer == NULL);
800 rc = kranal_passive_conn_handshake(sock, &peer_nid, &conn);
804 /* assume this is a new peer */
805 peer = kranal_create_peer(peer_nid);
807 CERROR("Can't allocate peer for "LPX64"\n", peer_nid);
808 kranal_conn_decref(conn);
812 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
814 peer2 = kranal_find_peer_locked(peer_nid);
816 /* peer table takes my initial ref on peer */
817 list_add_tail(&peer->rap_list,
818 kranal_nid2peerlist(peer_nid));
820 /* peer_nid already in the peer table */
821 kranal_peer_decref(peer);
824 /* NB I may now have a non-persistent peer in the peer
825 * table with no connections: I can't drop the global lock
826 * until I've given it a connection or removed it, and when
827 * I do 'peer' can disappear under me. */
830 LASSERT (kranal_peer_active(peer)); /* peer is in the peer table */
832 /* Refuse to duplicate an existing connection (both sides might try
833 * to connect at once). NB we return success! We _do_ have a
834 * connection (so we don't need to remove the peer from the peer
835 * table) and we _don't_ have any blocked txs to complete */
836 rc = kranal_conn_isdup_locked(peer, conn);
838 LASSERT (!list_empty(&peer->rap_conns));
839 LASSERT (list_empty(&peer->rap_tx_queue));
840 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
841 CWARN("Not creating duplicate connection to "LPX64": %d\n",
843 kranal_conn_decref(conn);
847 kranal_peer_addref(peer); /* +1 ref for conn */
848 conn->rac_peer = peer;
849 list_add_tail(&conn->rac_list, &peer->rap_conns);
851 kranal_conn_addref(conn); /* +1 ref for conn table */
852 list_add_tail(&conn->rac_hashlist,
853 kranal_cqid2connlist(conn->rac_cqid));
855 /* Schedule all packets blocking for a connection */
856 while (!list_empty(&peer->rap_tx_queue)) {
857 tx = list_entry(&peer->rap_tx_queue.next,
860 list_del(&tx->tx_list);
861 kranal_post_fma(conn, tx);
864 nstale = kranal_close_stale_conns_locked(peer, conn);
866 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
868 /* CAVEAT EMPTOR: passive peer can disappear NOW */
871 CWARN("Closed %d stale conns to "LPX64"\n", nstale, peer_nid);
873 /* Ensure conn gets checked. Transmits may have been queued and an
874 * FMA event may have happened before it got in the cq hash table */
875 kranal_schedule_conn(conn);
880 kranal_connect (kra_peer_t *peer)
884 struct list_head zombies;
887 LASSERT (peer->rap_connecting);
889 rc = kranal_conn_handshake(NULL, peer);
891 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
893 LASSERT (peer->rap_connecting);
894 peer->rap_connecting = 0;
897 /* kranal_conn_handshake() queues blocked txs immediately on
898 * success to avoid messages jumping the queue */
899 LASSERT (list_empty(&peer->rap_tx_queue));
901 /* reset reconnection timeouts */
902 peer->rap_reconnect_interval = RANAL_MIN_RECONNECT_INTERVAL;
903 peer->rap_reconnect_time = CURRENT_TIME;
905 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
909 LASSERT (peer->rap_reconnect_interval != 0);
910 peer->rap_reconnect_time = CURRENT_TIME + peer->rap_reconnect_interval;
911 peer->rap_reconnect_interval = MAX(RANAL_MAX_RECONNECT_INTERVAL,
912 1 * peer->rap_reconnect_interval);
914 /* Grab all blocked packets while we have the global lock */
915 list_add(&zombies, &peer->rap_tx_queue);
916 list_del_init(&peer->rap_tx_queue);
918 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
920 if (list_empty(&zombies))
923 CWARN("Dropping packets for "LPX64": connection failed\n",
927 tx = list_entry(zombies.next, kra_tx_t, tx_list);
929 list_del(&tx->tx_list);
930 kranal_tx_done(tx, -EHOSTUNREACH);
932 } while (!list_empty(&zombies));
936 kranal_listener(void *arg)
938 struct sockaddr_in addr;
941 struct socket *newsock;
943 kra_connreq_t *connreqs;
947 /* Parent thread holds kra_nid_mutex, and is, or is about to
948 * block on kra_listener_signal */
950 port = kranal_tunables.kra_port;
951 snprintf(name, sizeof(name), "kranal_lstn%03d", port);
952 kportal_daemonize(name);
953 kportal_blockallsigs();
955 init_waitqueue_entry(&wait, current);
958 PORTAL_ALLOC(connreqs, 2 * sizeof(*connreqs));
959 if (connreqs == NULL)
962 rc = kranal_create_sock(&sock);
966 memset(&addr, 0, sizeof(addr));
967 addr.sin_family = AF_INET;
968 addr.sin_port = htons(port);
969 addr.sin_addr.s_addr = INADDR_ANY;
971 rc = sock->ops->bind(sock, (struct sockaddr *)&addr, sizeof(addr));
973 CERROR("Can't bind to port %d\n", port);
977 rc = sock->ops->listen(sock, kranal_tunables.kra_backlog);
979 CERROR("Can't set listen backlog %d: %d\n",
980 kranal_tunables.kra_backlog, rc);
984 LASSERT (kranal_data.kra_listener_sock == NULL);
985 kranal_data.kra_listener_sock = sock;
987 /* unblock waiting parent */
988 LASSERT (kranal_data.kra_listener_shutdown == 0);
989 up(&kranal_data.kra_listener_signal);
991 /* Wake me any time something happens on my socket */
992 add_wait_queue(sock->sk->sk_sleep, &wait);
994 while (kranal_data.kra_listener_shutdown == 0) {
996 newsock = sock_alloc();
997 if (newsock == NULL) {
998 CERROR("Can't allocate new socket for accept\n");
1003 set_current_state(TASK_INTERRUPTIBLE);
1005 rc = sock->ops->accept(sock, newsock, O_NONBLOCK);
1007 if (rc == -EAGAIN &&
1008 kranal_data.kra_listener_shutdown == 0)
1011 set_current_state(TASK_RUNNING);
1014 sock_release(newsock);
1015 if (rc != -EAGAIN) {
1016 CERROR("Accept failed: %d\n", rc);
1022 kranal_conn_handshake(newsock, NULL);
1023 sock_release(newsock);
1027 remove_wait_queue(sock->sk->sk_sleep, &wait);
1030 kranal_data.kra_listener_sock = NULL;
1032 PORTAL_FREE(connreqs, 2 * sizeof(*connreqs));
1034 /* set completion status and unblock thread waiting for me
1035 * (parent on startup failure, executioner on normal shutdown) */
1036 kranal_data.kra_listener_shutdown = rc;
1037 up(&kranal_data.kra_listener_signal);
1043 kranal_start_listener (void)
1048 CDEBUG(D_WARNING, "Starting listener\n");
1050 /* Called holding kra_nid_mutex: listener stopped */
1051 LASSERT (kranal_data.kra_listener_sock == NULL);
1053 kranal_data.kra_listener_shutdown = 0;
1054 pid = kernel_thread(kranal_listener, NULL, 0);
1056 CERROR("Can't spawn listener: %ld\n", pid);
1060 /* Block until listener has started up. */
1061 down(&kranal_data.kra_listener_signal);
1063 rc = kranal_data.kra_listener_shutdown;
1064 LASSERT ((rc != 0) == (kranal_data.kra_listener_sock == NULL));
1066 CDEBUG(D_WARNING, "Listener %ld started OK\n", pid);
1071 kranal_stop_listener(void)
1073 CDEBUG(D_WARNING, "Stopping listener\n");
1075 /* Called holding kra_nid_mutex: listener running */
1076 LASSERT (kranal_data.kra_listener_sock != NULL);
1078 kranal_data.kra_listener_shutdown = 1;
1079 wake_up_all(kranal_data.kra_listener_sock->sk->sk_sleep);
1081 /* Block until listener has torn down. */
1082 down(&kranal_data.kra_listener_signal);
1084 LASSERT (kranal_data.kra_listener_sock == NULL);
1085 CDEBUG(D_WARNING, "Listener stopped\n");
1089 kranal_listener_procint(ctl_table *table, int write, struct file *filp,
1090 void *buffer, size_t *lenp)
1092 int *tunable = (int *)table->data;
1096 /* No race with nal initialisation since the nal is setup all the time
1097 * it's loaded. When that changes, change this! */
1098 LASSERT (kranal_data.kra_init == RANAL_INIT_ALL);
1100 down(&kranal_data.kra_nid_mutex);
1102 LASSERT (tunable == &kranal_tunables.kra_port ||
1103 tunable == &kranal_tunables.kra_backlog);
1106 rc = proc_dointvec(table, write, filp, buffer, lenp);
1109 (*tunable != old_val ||
1110 kranal_data.kra_listener_sock == NULL)) {
1112 if (kranal_data.kra_listener_sock != NULL)
1113 kranal_stop_listener();
1115 rc = kranal_start_listener();
1118 CWARN("Unable to start listener with new tunable:"
1119 " reverting to old value\n");
1121 kranal_start_listener();
1125 up(&kranal_data.kra_nid_mutex);
1127 LASSERT (kranal_data.kra_init == RANAL_INIT_ALL);
1132 kranal_set_mynid(ptl_nid_t nid)
1134 unsigned long flags;
1135 lib_ni_t *ni = &kranal_lib.libnal_ni;
1138 CDEBUG(D_NET, "setting mynid to "LPX64" (old nid="LPX64")\n",
1139 nid, ni->ni_pid.nid);
1141 down(&kranal_data.kra_nid_mutex);
1143 if (nid == ni->ni_pid.nid) {
1144 /* no change of NID */
1145 up(&kranal_data.kra_nid_mutex);
1149 if (kranal_data.kra_listener_sock != NULL)
1150 kranal_stop_listener();
1152 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
1153 kranal_data.kra_peerstamp++;
1154 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
1156 ni->ni_pid.nid = nid;
1158 /* Delete all existing peers and their connections after new
1159 * NID/connstamp set to ensure no old connections in our brave
1161 kranal_del_peer(PTL_NID_ANY, 0);
1163 if (nid != PTL_NID_ANY)
1164 rc = kranal_start_listener();
1166 up(&kranal_data.kra_nid_mutex);
1171 kranal_create_peer (ptl_nid_t nid)
1175 LASSERT (nid != PTL_NID_ANY);
1177 PORTAL_ALLOC(peer, sizeof(*peer));
1181 memset(peer, 0, sizeof(*peer)); /* zero flags etc */
1183 peer->rap_nid = nid;
1184 atomic_set(&peer->rap_refcount, 1); /* 1 ref for caller */
1186 INIT_LIST_HEAD(&peer->rap_list);
1187 INIT_LIST_HEAD(&peer->rap_connd_list);
1188 INIT_LIST_HEAD(&peer->rap_conns);
1189 INIT_LIST_HEAD(&peer->rap_tx_queue);
1191 peer->rap_reconnect_time = CURRENT_TIME;
1192 peer->rap_reconnect_interval = RANAL_MIN_RECONNECT_INTERVAL;
1194 atomic_inc(&kranal_data.kra_npeers);
1199 kranal_destroy_peer (kra_peer_t *peer)
1201 CDEBUG(D_NET, "peer "LPX64" %p deleted\n", peer->rap_nid, peer);
1203 LASSERT (atomic_read(&peer->rap_refcount) == 0);
1204 LASSERT (peer->rap_persistence == 0);
1205 LASSERT (!kranal_peer_active(peer));
1206 LASSERT (!peer->rap_connecting);
1207 LASSERT (list_empty(&peer->rap_conns));
1208 LASSERT (list_empty(&peer->rap_tx_queue));
1209 LASSERT (list_empty(&peer->rap_connd_list));
1211 PORTAL_FREE(peer, sizeof(*peer));
1213 /* NB a peer's connections keep a reference on their peer until
1214 * they are destroyed, so we can be assured that _all_ state to do
1215 * with this peer has been cleaned up when its refcount drops to
1217 atomic_dec(&kranal_data.kra_npeers);
1221 kranal_find_peer_locked (ptl_nid_t nid)
1223 struct list_head *peer_list = kranal_nid2peerlist(nid);
1224 struct list_head *tmp;
1227 list_for_each (tmp, peer_list) {
1229 peer = list_entry(tmp, kra_peer_t, rap_list);
1231 LASSERT (peer->rap_persistence > 0 || /* persistent peer */
1232 !list_empty(&peer->rap_conns)); /* active conn */
1234 if (peer->rap_nid != nid)
1237 CDEBUG(D_NET, "got peer [%p] -> "LPX64" (%d)\n",
1238 peer, nid, atomic_read(&peer->rap_refcount));
1245 kranal_find_peer (ptl_nid_t nid)
1249 read_lock(&kranal_data.kra_global_lock);
1250 peer = kranal_find_peer_locked(nid);
1251 if (peer != NULL) /* +1 ref for caller? */
1252 kranal_peer_addref(peer);
1253 read_unlock(&kranal_data.kra_global_lock);
1259 kranal_unlink_peer_locked (kra_peer_t *peer)
1261 LASSERT (peer->rap_persistence == 0);
1262 LASSERT (list_empty(&peer->rap_conns));
1264 LASSERT (kranal_peer_active(peer));
1265 list_del_init(&peer->rap_list);
1267 /* lose peerlist's ref */
1268 kranal_peer_decref(peer);
1272 kranal_get_peer_info (int index, ptl_nid_t *nidp, __u32 *ipp, int *portp,
1276 struct list_head *ptmp;
1279 read_lock(&kranal_data.kra_global_lock);
1281 for (i = 0; i < kranal_data.kra_peer_hash_size; i++) {
1283 list_for_each(ptmp, &kranal_data.kra_peers[i]) {
1285 peer = list_entry(ptmp, kra_peer_t, rap_list);
1286 LASSERT (peer->rap_persistence > 0 ||
1287 !list_empty(&peer->rap_conns));
1292 *nidp = peer->rap_nid;
1293 *ipp = peer->rap_ip;
1294 *portp = peer->rap_port;
1295 *persistencep = peer->rap_persistence;
1297 read_unlock(&kranal_data.kra_global_lock);
1302 read_unlock(&kranal_data.kra_global_lock);
1307 kranal_add_persistent_peer (ptl_nid_t nid, __u32 ip, int port)
1309 unsigned long flags;
1313 if (nid == PTL_NID_ANY)
1316 peer = kranal_create_peer(nid);
1320 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
1322 peer2 = kranal_find_peer_locked(nid);
1323 if (peer2 != NULL) {
1324 kranal_peer_decref(peer);
1327 /* peer table takes existing ref on peer */
1328 list_add_tail(&peer->rap_list,
1329 kranal_nid2peerlist(nid));
1333 peer->rap_port = port;
1334 peer->rap_persistence++;
1336 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
1341 kranal_del_peer_locked (kra_peer_t *peer, int single_share)
1343 struct list_head *ctmp;
1344 struct list_head *cnxt;
1348 peer->rap_persistence = 0;
1349 else if (peer->rap_persistence > 0)
1350 peer->rap_persistence--;
1352 if (peer->rap_persistence != 0)
1355 if (list_empty(&peer->rap_conns)) {
1356 kranal_unlink_peer_locked(peer);
1358 list_for_each_safe(ctmp, cnxt, &peer->rap_conns) {
1359 conn = list_entry(ctmp, kra_conn_t, rac_list);
1361 kranal_close_conn_locked(conn, 0);
1363 /* peer unlinks itself when last conn is closed */
1368 kranal_del_peer (ptl_nid_t nid, int single_share)
1370 unsigned long flags;
1371 struct list_head *ptmp;
1372 struct list_head *pnxt;
1379 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
1381 if (nid != PTL_NID_ANY)
1382 lo = hi = kranal_nid2peerlist(nid) - kranal_data.kra_peers;
1385 hi = kranal_data.kra_peer_hash_size - 1;
1388 for (i = lo; i <= hi; i++) {
1389 list_for_each_safe (ptmp, pnxt, &kranal_data.kra_peers[i]) {
1390 peer = list_entry(ptmp, kra_peer_t, rap_list);
1391 LASSERT (peer->rap_persistence > 0 ||
1392 !list_empty(&peer->rap_conns));
1394 if (!(nid == PTL_NID_ANY || peer->rap_nid == nid))
1397 kranal_del_peer_locked(peer, single_share);
1398 rc = 0; /* matched something */
1405 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
1411 kranal_get_conn_by_idx (int index)
1414 struct list_head *ptmp;
1416 struct list_head *ctmp;
1419 read_lock (&kranal_data.kra_global_lock);
1421 for (i = 0; i < kranal_data.kra_peer_hash_size; i++) {
1422 list_for_each (ptmp, &kranal_data.kra_peers[i]) {
1424 peer = list_entry(ptmp, kra_peer_t, rap_list);
1425 LASSERT (peer->rap_persistence > 0 ||
1426 !list_empty(&peer->rap_conns));
1428 list_for_each (ctmp, &peer->rap_conns) {
1432 conn = list_entry(ctmp, kra_conn_t, rac_list);
1433 CDEBUG(D_NET, "++conn[%p] -> "LPX64" (%d)\n",
1434 conn, conn->rac_peer->rap_nid,
1435 atomic_read(&conn->rac_refcount));
1436 atomic_inc(&conn->rac_refcount);
1437 read_unlock(&kranal_data.kra_global_lock);
1443 read_unlock(&kranal_data.kra_global_lock);
1448 kranal_close_peer_conns_locked (kra_peer_t *peer, int why)
1451 struct list_head *ctmp;
1452 struct list_head *cnxt;
1455 list_for_each_safe (ctmp, cnxt, &peer->rap_conns) {
1456 conn = list_entry(ctmp, kra_conn_t, rac_list);
1459 kranal_close_conn_locked(conn, why);
1466 kranal_close_matching_conns (ptl_nid_t nid)
1468 unsigned long flags;
1470 struct list_head *ptmp;
1471 struct list_head *pnxt;
1477 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
1479 if (nid != PTL_NID_ANY)
1480 lo = hi = kranal_nid2peerlist(nid) - kranal_data.kra_peers;
1483 hi = kranal_data.kra_peer_hash_size - 1;
1486 for (i = lo; i <= hi; i++) {
1487 list_for_each_safe (ptmp, pnxt, &kranal_data.kra_peers[i]) {
1489 peer = list_entry(ptmp, kra_peer_t, rap_list);
1490 LASSERT (peer->rap_persistence > 0 ||
1491 !list_empty(&peer->rap_conns));
1493 if (!(nid == PTL_NID_ANY || nid == peer->rap_nid))
1496 count += kranal_close_peer_conns_locked(peer, 0);
1500 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
1502 /* wildcards always succeed */
1503 if (nid == PTL_NID_ANY)
1506 return (count == 0) ? -ENOENT : 0;
1510 kranal_cmd(struct portals_cfg *pcfg, void * private)
1514 LASSERT (pcfg != NULL);
1516 switch(pcfg->pcfg_command) {
1517 case NAL_CMD_GET_PEER: {
1521 int share_count = 0;
1523 rc = kranal_get_peer_info(pcfg->pcfg_count,
1524 &nid, &ip, &port, &share_count);
1525 pcfg->pcfg_nid = nid;
1526 pcfg->pcfg_size = 0;
1528 pcfg->pcfg_misc = port;
1529 pcfg->pcfg_count = 0;
1530 pcfg->pcfg_wait = share_count;
1533 case NAL_CMD_ADD_PEER: {
1534 rc = kranal_add_persistent_peer(pcfg->pcfg_nid,
1535 pcfg->pcfg_id, /* IP */
1536 pcfg->pcfg_misc); /* port */
1539 case NAL_CMD_DEL_PEER: {
1540 rc = kranal_del_peer(pcfg->pcfg_nid,
1541 /* flags == single_share */
1542 pcfg->pcfg_flags != 0);
1545 case NAL_CMD_GET_CONN: {
1546 kra_conn_t *conn = kranal_get_conn_by_idx(pcfg->pcfg_count);
1552 pcfg->pcfg_nid = conn->rac_peer->rap_nid;
1553 pcfg->pcfg_id = conn->rac_device->rad_id;
1554 pcfg->pcfg_misc = 0;
1555 pcfg->pcfg_flags = 0;
1556 kranal_conn_decref(conn);
1560 case NAL_CMD_CLOSE_CONNECTION: {
1561 rc = kranal_close_matching_conns(pcfg->pcfg_nid);
1564 case NAL_CMD_REGISTER_MYNID: {
1565 if (pcfg->pcfg_nid == PTL_NID_ANY)
1568 rc = kranal_set_mynid(pcfg->pcfg_nid);
1577 kranal_free_txdescs(struct list_head *freelist)
1581 while (!list_empty(freelist)) {
1582 tx = list_entry(freelist->next, kra_tx_t, tx_list);
1584 list_del(&tx->tx_list);
1585 PORTAL_FREE(tx->tx_phys, PTL_MD_MAX_IOV * sizeof(*tx->tx_phys));
1586 PORTAL_FREE(tx, sizeof(*tx));
1591 kranal_alloc_txdescs(struct list_head *freelist, int n)
1593 int isnblk = (freelist == &kranal_data.kra_idle_nblk_txs);
1597 LASSERT (freelist == &kranal_data.kra_idle_txs ||
1598 freelist == &kranal_data.kra_idle_nblk_txs);
1599 LASSERT (list_empty(freelist));
1601 for (i = 0; i < n; i++) {
1603 PORTAL_ALLOC(tx, sizeof(*tx));
1605 CERROR("Can't allocate %stx[%d]\n",
1606 isnblk ? "nblk " : "", i);
1607 kranal_free_txdescs(freelist);
1611 PORTAL_ALLOC(tx->tx_phys,
1612 PTL_MD_MAX_IOV * sizeof(*tx->tx_phys));
1613 if (tx->tx_phys == NULL) {
1614 CERROR("Can't allocate %stx[%d]->tx_phys\n",
1615 isnblk ? "nblk " : "", i);
1617 PORTAL_FREE(tx, sizeof(*tx));
1618 kranal_free_txdescs(freelist);
1622 tx->tx_isnblk = isnblk;
1623 tx->tx_buftype = RANAL_BUF_NONE;
1624 tx->tx_msg.ram_type = RANAL_MSG_NONE;
1626 list_add(&tx->tx_list, freelist);
1633 kranal_device_init(int id, kra_device_t *dev)
1635 const int total_ntx = RANAL_NTX + RANAL_NTX_NBLK;
1639 rrc = RapkGetDeviceByIndex(id, kranal_device_callback,
1641 if (rrc != RAP_SUCCESS) {
1642 CERROR("Can't get Rapidarray Device %d: %d\n", id, rrc);
1646 rrc = RapkReserveRdma(dev->rad_handle, total_ntx);
1647 if (rrc != RAP_SUCCESS) {
1648 CERROR("Can't reserve %d RDMA descriptors"
1649 " for device %d: %d\n", total_ntx, id, rrc);
1653 rrc = RapkCreatePtag(dev->rad_handle,
1655 if (rrc != RAP_SUCCESS) {
1656 CERROR("Can't create ptag"
1657 " for device %d: %d\n", id, rrc);
1661 rrc = RapkCreateCQ(dev->rad_handle, total_ntx, dev->rad_ptag,
1663 if (rrc != RAP_SUCCESS) {
1664 CERROR("Can't create rdma cq size %d"
1665 " for device %d: %d\n", total_ntx, id, rrc);
1669 rrc = RapkCreateCQ(dev->rad_handle, RANAL_FMA_CQ_SIZE,
1670 dev->rad_ptag, &dev->rad_fma_cq);
1671 if (rrc != RAP_SUCCESS) {
1672 CERROR("Can't create fma cq size %d"
1673 " for device %d: %d\n", RANAL_FMA_CQ_SIZE, id, rrc);
1680 RapkDestroyCQ(dev->rad_handle, dev->rad_rdma_cq, dev->rad_ptag);
1682 RapkDestroyPtag(dev->rad_handle, dev->rad_ptag);
1684 RapkReleaseDevice(dev->rad_handle);
1690 kranal_device_fini(kra_device_t *dev)
1692 LASSERT(dev->rad_scheduler == NULL);
1693 RapkDestroyCQ(dev->rad_handle, dev->rad_fma_cq, dev->rad_ptag);
1694 RapkDestroyCQ(dev->rad_handle, dev->rad_rdma_cq, dev->rad_ptag);
1695 RapkDestroyPtag(dev->rad_handle, dev->rad_ptag);
1696 RapkReleaseDevice(dev->rad_handle);
1700 kranal_api_shutdown (nal_t *nal)
1703 unsigned long flags;
1705 if (nal->nal_refct != 0) {
1706 /* This module got the first ref */
1707 PORTAL_MODULE_UNUSE;
1711 CDEBUG(D_MALLOC, "before NAL cleanup: kmem %d\n",
1712 atomic_read(&portal_kmemory));
1714 LASSERT (nal == &kranal_api);
1716 switch (kranal_data.kra_init) {
1718 CERROR("Unexpected state %d\n", kranal_data.kra_init);
1721 case RANAL_INIT_ALL:
1722 /* stop calls to nal_cmd */
1723 libcfs_nal_cmd_unregister(RANAL);
1724 /* No new persistent peers */
1726 /* resetting my NID to unadvertises me, removes my
1727 * listener and nukes all current peers */
1728 kranal_set_mynid(PTL_NID_ANY);
1729 /* no new peers or conns */
1731 /* Wait for all peer/conn state to clean up */
1733 while (atomic_read(&kranal_data.kra_nconns) != 0 ||
1734 atomic_read(&kranal_data.kra_npeers) != 0) {
1736 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* power of 2? */
1737 "waiting for %d peers and %d conns to close down\n",
1738 atomic_read(&kranal_data.kra_npeers),
1739 atomic_read(&kranal_data.kra_nconns));
1744 case RANAL_INIT_LIB:
1745 lib_fini(&kranal_lib);
1748 case RANAL_INIT_DATA:
1752 /* flag threads to terminate; wake and wait for them to die */
1753 kranal_data.kra_shutdown = 1;
1755 for (i = 0; i < kranal_data.kra_ndevs; i++) {
1756 kra_device_t *dev = &kranal_data.kra_devices[i];
1758 LASSERT (list_empty(&dev->rad_connq));
1760 spin_lock_irqsave(&dev->rad_lock, flags);
1761 wake_up(&dev->rad_waitq);
1762 spin_unlock_irqrestore(&dev->rad_lock, flags);
1765 spin_lock_irqsave(&kranal_data.kra_reaper_lock, flags);
1766 wake_up_all(&kranal_data.kra_reaper_waitq);
1767 spin_unlock_irqrestore(&kranal_data.kra_reaper_lock, flags);
1769 LASSERT (list_empty(&kranal_data.kra_connd_peers));
1770 spin_lock_irqsave(&kranal_data.kra_connd_lock, flags);
1771 wake_up_all(&kranal_data.kra_connd_waitq);
1772 spin_unlock_irqrestore(&kranal_data.kra_connd_lock, flags);
1775 while (atomic_read(&kranal_data.kra_nthreads) != 0) {
1777 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* power of 2? */
1778 "Waiting for %d threads to terminate\n",
1779 atomic_read(&kranal_data.kra_nthreads));
1783 LASSERT (atomic_read(&kranal_data.kra_npeers) == 0);
1784 if (kranal_data.kra_peers != NULL) {
1785 for (i = 0; i < kranal_data.kra_peer_hash_size; i++)
1786 LASSERT (list_empty(&kranal_data.kra_peers[i]));
1788 PORTAL_FREE(kranal_data.kra_peers,
1789 sizeof (struct list_head) *
1790 kranal_data.kra_peer_hash_size);
1793 LASSERT (atomic_read(&kranal_data.kra_nconns) == 0);
1794 if (kranal_data.kra_conns != NULL) {
1795 for (i = 0; i < kranal_data.kra_conn_hash_size; i++)
1796 LASSERT (list_empty(&kranal_data.kra_conns[i]));
1798 PORTAL_FREE(kranal_data.kra_conns,
1799 sizeof (struct list_head) *
1800 kranal_data.kra_conn_hash_size);
1803 for (i = 0; i < kranal_data.kra_ndevs; i++)
1804 kranal_device_fini(&kranal_data.kra_devices[i]);
1806 kranal_free_txdescs(&kranal_data.kra_idle_txs);
1807 kranal_free_txdescs(&kranal_data.kra_idle_nblk_txs);
1809 CDEBUG(D_MALLOC, "after NAL cleanup: kmem %d\n",
1810 atomic_read(&portal_kmemory));
1811 printk(KERN_INFO "Lustre: RapidArray NAL unloaded (final mem %d)\n",
1812 atomic_read(&portal_kmemory));
1814 kranal_data.kra_init = RANAL_INIT_NOTHING;
1818 kranal_api_startup (nal_t *nal, ptl_pid_t requested_pid,
1819 ptl_ni_limits_t *requested_limits,
1820 ptl_ni_limits_t *actual_limits)
1822 static int device_ids[] = {RAPK_MAIN_DEVICE_ID,
1823 RAPK_EXPANSION_DEVICE_ID};
1825 ptl_process_id_t process_id;
1826 int pkmem = atomic_read(&portal_kmemory);
1831 LASSERT (nal == &kranal_api);
1833 if (nal->nal_refct != 0) {
1834 if (actual_limits != NULL)
1835 *actual_limits = kranal_lib.libnal_ni.ni_actual_limits;
1836 /* This module got the first ref */
1841 LASSERT (kranal_data.kra_init == RANAL_INIT_NOTHING);
1843 memset(&kranal_data, 0, sizeof(kranal_data)); /* zero pointers, flags etc */
1845 /* CAVEAT EMPTOR: Every 'Fma' message includes the sender's NID and
1846 * a unique (for all time) connstamp so we can uniquely identify
1847 * the sender. The connstamp is an incrementing counter
1848 * initialised with seconds + microseconds at startup time. So we
1849 * rely on NOT creating connections more frequently on average than
1850 * 1MHz to ensure we don't use old connstamps when we reboot. */
1851 do_gettimeofday(&tv);
1852 kranal_data.kra_connstamp =
1853 kranal_data.kra_peerstamp = (((__u64)tv.tv_sec) * 1000000) + tv.tv_usec;
1855 init_MUTEX(&kranal_data.kra_nid_mutex);
1856 init_MUTEX_LOCKED(&kranal_data.kra_listener_signal);
1858 rwlock_init(&kranal_data.kra_global_lock);
1860 for (i = 0; i < RANAL_MAXDEVS; i++ ) {
1861 kra_device_t *dev = &kranal_data.kra_devices[i];
1864 INIT_LIST_HEAD(&dev->rad_connq);
1865 init_waitqueue_head(&dev->rad_waitq);
1866 spin_lock_init(&dev->rad_lock);
1869 kranal_data.kra_new_min_timeout = MAX_SCHEDULE_TIMEOUT;
1870 init_waitqueue_head(&kranal_data.kra_reaper_waitq);
1871 spin_lock_init(&kranal_data.kra_reaper_lock);
1873 INIT_LIST_HEAD(&kranal_data.kra_connd_peers);
1874 init_waitqueue_head(&kranal_data.kra_connd_waitq);
1875 spin_lock_init(&kranal_data.kra_connd_lock);
1877 INIT_LIST_HEAD(&kranal_data.kra_idle_txs);
1878 INIT_LIST_HEAD(&kranal_data.kra_idle_nblk_txs);
1879 init_waitqueue_head(&kranal_data.kra_idle_tx_waitq);
1880 spin_lock_init(&kranal_data.kra_tx_lock);
1882 /* OK to call kranal_api_shutdown() to cleanup now */
1883 kranal_data.kra_init = RANAL_INIT_DATA;
1885 kranal_data.kra_peer_hash_size = RANAL_PEER_HASH_SIZE;
1886 PORTAL_ALLOC(kranal_data.kra_peers,
1887 sizeof(struct list_head) * kranal_data.kra_peer_hash_size);
1888 if (kranal_data.kra_peers == NULL)
1891 for (i = 0; i < kranal_data.kra_peer_hash_size; i++)
1892 INIT_LIST_HEAD(&kranal_data.kra_peers[i]);
1894 kranal_data.kra_conn_hash_size = RANAL_PEER_HASH_SIZE;
1895 PORTAL_ALLOC(kranal_data.kra_conns,
1896 sizeof(struct list_head) * kranal_data.kra_conn_hash_size);
1897 if (kranal_data.kra_conns == NULL)
1900 for (i = 0; i < kranal_data.kra_conn_hash_size; i++)
1901 INIT_LIST_HEAD(&kranal_data.kra_conns[i]);
1903 rc = kranal_alloc_txdescs(&kranal_data.kra_idle_txs, RANAL_NTX);
1907 rc = kranal_alloc_txdescs(&kranal_data.kra_idle_nblk_txs,RANAL_NTX_NBLK);
1911 process_id.pid = requested_pid;
1912 process_id.nid = PTL_NID_ANY; /* don't know my NID yet */
1914 rc = lib_init(&kranal_lib, nal, process_id,
1915 requested_limits, actual_limits);
1917 CERROR("lib_init failed: error %d\n", rc);
1921 /* lib interface initialised */
1922 kranal_data.kra_init = RANAL_INIT_LIB;
1923 /*****************************************************/
1925 rc = kranal_thread_start(kranal_reaper, NULL);
1927 CERROR("Can't spawn ranal reaper: %d\n", rc);
1931 for (i = 0; i < RANAL_N_CONND; i++) {
1932 rc = kranal_thread_start(kranal_connd, (void *)i);
1934 CERROR("Can't spawn ranal connd[%d]: %d\n",
1940 LASSERT(kranal_data.kra_ndevs == 0);
1941 for (i = 0; i < sizeof(device_ids)/sizeof(device_ids[0]); i++) {
1942 dev = &kranal_data.kra_devices[kranal_data.kra_ndevs];
1944 rc = kranal_device_init(device_ids[i], dev);
1946 kranal_data.kra_ndevs++;
1948 rc = kranal_thread_start(kranal_scheduler, dev);
1950 CERROR("Can't spawn ranal scheduler[%d]: %d\n",
1956 if (kranal_data.kra_ndevs == 0)
1959 rc = libcfs_nal_cmd_register(RANAL, &kranal_cmd, NULL);
1961 CERROR("Can't initialise command interface (rc = %d)\n", rc);
1965 /* flag everything initialised */
1966 kranal_data.kra_init = RANAL_INIT_ALL;
1967 /*****************************************************/
1969 CDEBUG(D_MALLOC, "initial kmem %d\n", atomic_read(&portal_kmemory));
1970 printk(KERN_INFO "Lustre: RapidArray NAL loaded "
1971 "(initial mem %d)\n", pkmem);
1976 kranal_api_shutdown(&kranal_api);
1981 kranal_module_fini (void)
1983 #ifdef CONFIG_SYSCTL
1984 if (kranal_tunables.kra_sysctl != NULL)
1985 unregister_sysctl_table(kranal_tunables.kra_sysctl);
1987 PtlNIFini(kranal_ni);
1989 ptl_unregister_nal(RANAL);
1993 kranal_module_init (void)
1997 /* the following must be sizeof(int) for
1998 * proc_dointvec/kranal_listener_procint() */
1999 LASSERT (sizeof(kranal_tunables.kra_timeout) == sizeof(int));
2000 LASSERT (sizeof(kranal_tunables.kra_listener_timeout) == sizeof(int));
2001 LASSERT (sizeof(kranal_tunables.kra_backlog) == sizeof(int));
2002 LASSERT (sizeof(kranal_tunables.kra_port) == sizeof(int));
2003 LASSERT (sizeof(kranal_tunables.kra_max_immediate) == sizeof(int));
2005 kranal_api.nal_ni_init = kranal_api_startup;
2006 kranal_api.nal_ni_fini = kranal_api_shutdown;
2008 /* Initialise dynamic tunables to defaults once only */
2009 kranal_tunables.kra_timeout = RANAL_TIMEOUT;
2011 rc = ptl_register_nal(RANAL, &kranal_api);
2013 CERROR("Can't register RANAL: %d\n", rc);
2014 return -ENOMEM; /* or something... */
2017 /* Pure gateways want the NAL started up at module load time... */
2018 rc = PtlNIInit(RANAL, LUSTRE_SRV_PTL_PID, NULL, NULL, &kranal_ni);
2019 if (rc != PTL_OK && rc != PTL_IFACE_DUP) {
2020 ptl_unregister_nal(RANAL);
2024 #ifdef CONFIG_SYSCTL
2025 /* Press on regardless even if registering sysctl doesn't work */
2026 kranal_tunables.kra_sysctl =
2027 register_sysctl_table(kranal_top_ctl_table, 0);
2032 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
2033 MODULE_DESCRIPTION("Kernel RapidArray NAL v0.01");
2034 MODULE_LICENSE("GPL");
2036 module_init(kranal_module_init);
2037 module_exit(kranal_module_fini);