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 idx = peer->rap_nid & 0x7fffffff;
698 dev = &kranal_data.kra_devices[idx % kranal_data.kra_ndevs];
700 rc = kranal_create_conn(&conn, dev);
704 kranal_pack_connreq(&connreq, conn);
706 rc = ranal_connect_sock(peer, &sock);
710 /* CAVEAT EMPTOR: the passive side receives with a SHORT rx timeout
711 * immediately after accepting a connection, so we connect and then
712 * send immediately. */
714 rc = kranal_sock_write(sock, &connreq, sizeof(connreq));
716 CERROR("Can't tx connreq to %u.%u.%u.%u/%d: %d\n",
717 HIPQUAD(peer->rap_ip), peer->rap_port, rc);
721 rc = kranal_recv_connreq(sock, &connreq, kranal_tunables.kra_timeout);
723 CERROR("Can't rx connreq from %u.%u.%u.%u/%d: %d\n",
724 HIPQUAD(peer->rap_ip), peer->rap_port, rc);
731 if (connreq.racr_nid != peer->rap_nid) {
732 CERROR("Unexpected nid from %u.%u.%u.%u/%d: "
733 "received "LPX64" expected "LPX64"\n",
734 HIPQUAD(peer->rap_ip), peer->rap_port,
735 connreq.racr_nid, peer->rap_nid);
739 if (connreq.racr_devid != dev->rad_id) {
740 CERROR("Unexpected device id from %u.%u.%u.%u/%d: "
741 "received %d expected %d\n",
742 HIPQUAD(peer->rap_ip), peer->rap_port,
743 connreq.racr_devid, dev->rad_id);
747 rc = kranal_set_conn_params(conn, &connreq,
748 peer->rap_ip, peer->rap_port);
758 kranal_conn_decref(conn);
763 kranal_conn_handshake (struct socket *sock, kra_peer_t *peer)
774 /* active: connd wants to connect to 'peer' */
775 LASSERT (peer != NULL);
776 LASSERT (peer->rap_connecting);
778 rc = kranal_active_conn_handshake(peer, &conn);
782 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
784 if (!kranal_peer_active(peer)) {
785 /* raced with peer getting unlinked */
786 write_unlock_irqrestore(&kranal_data.kra_global_lock,
788 kranal_conn_decref(conn);
792 peer_nid = peer->rap_nid;
795 /* passive: listener accepted 'sock' */
796 LASSERT (peer == NULL);
798 rc = kranal_passive_conn_handshake(sock, &peer_nid, &conn);
802 /* assume this is a new peer */
803 peer = kranal_create_peer(peer_nid);
805 CERROR("Can't allocate peer for "LPX64"\n", peer_nid);
806 kranal_conn_decref(conn);
810 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
812 peer2 = kranal_find_peer_locked(peer_nid);
814 /* peer table takes my initial ref on peer */
815 list_add_tail(&peer->rap_list,
816 kranal_nid2peerlist(peer_nid));
818 /* peer_nid already in the peer table */
819 kranal_peer_decref(peer);
822 /* NB I may now have a non-persistent peer in the peer
823 * table with no connections: I can't drop the global lock
824 * until I've given it a connection or removed it, and when
825 * I do 'peer' can disappear under me. */
828 LASSERT (kranal_peer_active(peer)); /* peer is in the peer table */
830 /* Refuse to duplicate an existing connection (both sides might try
831 * to connect at once). NB we return success! We _do_ have a
832 * connection (so we don't need to remove the peer from the peer
833 * table) and we _don't_ have any blocked txs to complete */
834 rc = kranal_conn_isdup_locked(peer, conn);
836 LASSERT (!list_empty(&peer->rap_conns));
837 LASSERT (list_empty(&peer->rap_tx_queue));
838 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
839 CWARN("Not creating duplicate connection to "LPX64": %d\n",
841 kranal_conn_decref(conn);
845 kranal_peer_addref(peer); /* +1 ref for conn */
846 conn->rac_peer = peer;
847 list_add_tail(&conn->rac_list, &peer->rap_conns);
849 kranal_conn_addref(conn); /* +1 ref for conn table */
850 list_add_tail(&conn->rac_hashlist,
851 kranal_cqid2connlist(conn->rac_cqid));
853 /* Schedule all packets blocking for a connection */
854 while (!list_empty(&peer->rap_tx_queue)) {
855 tx = list_entry(&peer->rap_tx_queue.next,
858 list_del(&tx->tx_list);
859 kranal_post_fma(conn, tx);
862 nstale = kranal_close_stale_conns_locked(peer, conn);
864 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
866 /* CAVEAT EMPTOR: passive peer can disappear NOW */
869 CWARN("Closed %d stale conns to "LPX64"\n", nstale, peer_nid);
871 /* Ensure conn gets checked. Transmits may have been queued and an
872 * FMA event may have happened before it got in the cq hash table */
873 kranal_schedule_conn(conn);
878 kranal_connect (kra_peer_t *peer)
882 struct list_head zombies;
885 LASSERT (peer->rap_connecting);
887 rc = kranal_conn_handshake(NULL, peer);
889 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
891 LASSERT (peer->rap_connecting);
892 peer->rap_connecting = 0;
895 /* kranal_conn_handshake() queues blocked txs immediately on
896 * success to avoid messages jumping the queue */
897 LASSERT (list_empty(&peer->rap_tx_queue));
899 /* reset reconnection timeouts */
900 peer->rap_reconnect_interval = RANAL_MIN_RECONNECT_INTERVAL;
901 peer->rap_reconnect_time = CURRENT_TIME;
903 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
907 LASSERT (peer->rap_reconnect_interval != 0);
908 peer->rap_reconnect_time = CURRENT_TIME + peer->rap_reconnect_interval;
909 peer->rap_reconnect_interval = MAX(RANAL_MAX_RECONNECT_INTERVAL,
910 1 * peer->rap_reconnect_interval);
912 /* Grab all blocked packets while we have the global lock */
913 list_add(&zombies, &peer->rap_tx_queue);
914 list_del_init(&peer->rap_tx_queue);
916 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
918 if (list_empty(&zombies))
921 CWARN("Dropping packets for "LPX64": connection failed\n",
925 tx = list_entry(zombies.next, kra_tx_t, tx_list);
927 list_del(&tx->tx_list);
928 kranal_tx_done(tx, -EHOSTUNREACH);
930 } while (!list_empty(&zombies));
934 kranal_listener(void *arg)
936 struct sockaddr_in addr;
939 struct socket *newsock;
941 kra_connreq_t *connreqs;
945 /* Parent thread holds kra_nid_mutex, and is, or is about to
946 * block on kra_listener_signal */
948 port = kranal_tunables.kra_port;
949 snprintf(name, sizeof(name), "kranal_lstn%03d", port);
950 kportal_daemonize(name);
951 kportal_blockallsigs();
953 init_waitqueue_entry(&wait, current);
956 PORTAL_ALLOC(connreqs, 2 * sizeof(*connreqs));
957 if (connreqs == NULL)
960 rc = kranal_create_sock(&sock);
964 memset(&addr, 0, sizeof(addr));
965 addr.sin_family = AF_INET;
966 addr.sin_port = htons(port);
967 addr.sin_addr.s_addr = INADDR_ANY;
969 rc = sock->ops->bind(sock, (struct sockaddr *)&addr, sizeof(addr));
971 CERROR("Can't bind to port %d\n", port);
975 rc = sock->ops->listen(sock, kranal_tunables.kra_backlog);
977 CERROR("Can't set listen backlog %d: %d\n",
978 kranal_tunables.kra_backlog, rc);
982 LASSERT (kranal_data.kra_listener_sock == NULL);
983 kranal_data.kra_listener_sock = sock;
985 /* unblock waiting parent */
986 LASSERT (kranal_data.kra_listener_shutdown == 0);
987 up(&kranal_data.kra_listener_signal);
989 /* Wake me any time something happens on my socket */
990 add_wait_queue(sock->sk->sk_sleep, &wait);
992 while (kranal_data.kra_listener_shutdown == 0) {
994 newsock = sock_alloc();
995 if (newsock == NULL) {
996 CERROR("Can't allocate new socket for accept\n");
1001 set_current_state(TASK_INTERRUPTIBLE);
1003 rc = sock->ops->accept(sock, newsock, O_NONBLOCK);
1005 if (rc == -EAGAIN &&
1006 kranal_data.kra_listener_shutdown == 0)
1009 set_current_state(TASK_RUNNING);
1012 sock_release(newsock);
1013 if (rc != -EAGAIN) {
1014 CERROR("Accept failed: %d\n", rc);
1020 kranal_conn_handshake(newsock, NULL);
1021 sock_release(newsock);
1025 remove_wait_queue(sock->sk->sk_sleep, &wait);
1028 kranal_data.kra_listener_sock = NULL;
1030 PORTAL_FREE(connreqs, 2 * sizeof(*connreqs));
1032 /* set completion status and unblock thread waiting for me
1033 * (parent on startup failure, executioner on normal shutdown) */
1034 kranal_data.kra_listener_shutdown = rc;
1035 up(&kranal_data.kra_listener_signal);
1041 kranal_start_listener (void)
1046 CDEBUG(D_WARNING, "Starting listener\n");
1048 /* Called holding kra_nid_mutex: listener stopped */
1049 LASSERT (kranal_data.kra_listener_sock == NULL);
1051 kranal_data.kra_listener_shutdown = 0;
1052 pid = kernel_thread(kranal_listener, NULL, 0);
1054 CERROR("Can't spawn listener: %ld\n", pid);
1058 /* Block until listener has started up. */
1059 down(&kranal_data.kra_listener_signal);
1061 rc = kranal_data.kra_listener_shutdown;
1062 LASSERT ((rc != 0) == (kranal_data.kra_listener_sock == NULL));
1064 CDEBUG(D_WARNING, "Listener %ld started OK\n", pid);
1069 kranal_stop_listener(void)
1071 CDEBUG(D_WARNING, "Stopping listener\n");
1073 /* Called holding kra_nid_mutex: listener running */
1074 LASSERT (kranal_data.kra_listener_sock != NULL);
1076 kranal_data.kra_listener_shutdown = 1;
1077 wake_up_all(kranal_data.kra_listener_sock->sk->sk_sleep);
1079 /* Block until listener has torn down. */
1080 down(&kranal_data.kra_listener_signal);
1082 LASSERT (kranal_data.kra_listener_sock == NULL);
1083 CDEBUG(D_WARNING, "Listener stopped\n");
1087 kranal_listener_procint(ctl_table *table, int write, struct file *filp,
1088 void *buffer, size_t *lenp)
1090 int *tunable = (int *)table->data;
1094 /* No race with nal initialisation since the nal is setup all the time
1095 * it's loaded. When that changes, change this! */
1096 LASSERT (kranal_data.kra_init == RANAL_INIT_ALL);
1098 down(&kranal_data.kra_nid_mutex);
1100 LASSERT (tunable == &kranal_tunables.kra_port ||
1101 tunable == &kranal_tunables.kra_backlog);
1104 rc = proc_dointvec(table, write, filp, buffer, lenp);
1107 (*tunable != old_val ||
1108 kranal_data.kra_listener_sock == NULL)) {
1110 if (kranal_data.kra_listener_sock != NULL)
1111 kranal_stop_listener();
1113 rc = kranal_start_listener();
1116 CWARN("Unable to start listener with new tunable:"
1117 " reverting to old value\n");
1119 kranal_start_listener();
1123 up(&kranal_data.kra_nid_mutex);
1125 LASSERT (kranal_data.kra_init == RANAL_INIT_ALL);
1130 kranal_set_mynid(ptl_nid_t nid)
1132 unsigned long flags;
1133 lib_ni_t *ni = &kranal_lib.libnal_ni;
1136 CDEBUG(D_NET, "setting mynid to "LPX64" (old nid="LPX64")\n",
1137 nid, ni->ni_pid.nid);
1139 down(&kranal_data.kra_nid_mutex);
1141 if (nid == ni->ni_pid.nid) {
1142 /* no change of NID */
1143 up(&kranal_data.kra_nid_mutex);
1147 if (kranal_data.kra_listener_sock != NULL)
1148 kranal_stop_listener();
1150 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
1151 kranal_data.kra_peerstamp++;
1152 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
1154 ni->ni_pid.nid = nid;
1156 /* Delete all existing peers and their connections after new
1157 * NID/connstamp set to ensure no old connections in our brave
1159 kranal_del_peer(PTL_NID_ANY, 0);
1161 if (nid != PTL_NID_ANY)
1162 rc = kranal_start_listener();
1164 up(&kranal_data.kra_nid_mutex);
1169 kranal_create_peer (ptl_nid_t nid)
1173 LASSERT (nid != PTL_NID_ANY);
1175 PORTAL_ALLOC(peer, sizeof(*peer));
1179 memset(peer, 0, sizeof(*peer)); /* zero flags etc */
1181 peer->rap_nid = nid;
1182 atomic_set(&peer->rap_refcount, 1); /* 1 ref for caller */
1184 INIT_LIST_HEAD(&peer->rap_list);
1185 INIT_LIST_HEAD(&peer->rap_connd_list);
1186 INIT_LIST_HEAD(&peer->rap_conns);
1187 INIT_LIST_HEAD(&peer->rap_tx_queue);
1189 peer->rap_reconnect_time = CURRENT_TIME;
1190 peer->rap_reconnect_interval = RANAL_MIN_RECONNECT_INTERVAL;
1192 atomic_inc(&kranal_data.kra_npeers);
1197 kranal_destroy_peer (kra_peer_t *peer)
1199 CDEBUG(D_NET, "peer "LPX64" %p deleted\n", peer->rap_nid, peer);
1201 LASSERT (atomic_read(&peer->rap_refcount) == 0);
1202 LASSERT (peer->rap_persistence == 0);
1203 LASSERT (!kranal_peer_active(peer));
1204 LASSERT (!peer->rap_connecting);
1205 LASSERT (list_empty(&peer->rap_conns));
1206 LASSERT (list_empty(&peer->rap_tx_queue));
1207 LASSERT (list_empty(&peer->rap_connd_list));
1209 PORTAL_FREE(peer, sizeof(*peer));
1211 /* NB a peer's connections keep a reference on their peer until
1212 * they are destroyed, so we can be assured that _all_ state to do
1213 * with this peer has been cleaned up when its refcount drops to
1215 atomic_dec(&kranal_data.kra_npeers);
1219 kranal_find_peer_locked (ptl_nid_t nid)
1221 struct list_head *peer_list = kranal_nid2peerlist(nid);
1222 struct list_head *tmp;
1225 list_for_each (tmp, peer_list) {
1227 peer = list_entry(tmp, kra_peer_t, rap_list);
1229 LASSERT (peer->rap_persistence > 0 || /* persistent peer */
1230 !list_empty(&peer->rap_conns)); /* active conn */
1232 if (peer->rap_nid != nid)
1235 CDEBUG(D_NET, "got peer [%p] -> "LPX64" (%d)\n",
1236 peer, nid, atomic_read(&peer->rap_refcount));
1243 kranal_find_peer (ptl_nid_t nid)
1247 read_lock(&kranal_data.kra_global_lock);
1248 peer = kranal_find_peer_locked(nid);
1249 if (peer != NULL) /* +1 ref for caller? */
1250 kranal_peer_addref(peer);
1251 read_unlock(&kranal_data.kra_global_lock);
1257 kranal_unlink_peer_locked (kra_peer_t *peer)
1259 LASSERT (peer->rap_persistence == 0);
1260 LASSERT (list_empty(&peer->rap_conns));
1262 LASSERT (kranal_peer_active(peer));
1263 list_del_init(&peer->rap_list);
1265 /* lose peerlist's ref */
1266 kranal_peer_decref(peer);
1270 kranal_get_peer_info (int index, ptl_nid_t *nidp, __u32 *ipp, int *portp,
1274 struct list_head *ptmp;
1277 read_lock(&kranal_data.kra_global_lock);
1279 for (i = 0; i < kranal_data.kra_peer_hash_size; i++) {
1281 list_for_each(ptmp, &kranal_data.kra_peers[i]) {
1283 peer = list_entry(ptmp, kra_peer_t, rap_list);
1284 LASSERT (peer->rap_persistence > 0 ||
1285 !list_empty(&peer->rap_conns));
1290 *nidp = peer->rap_nid;
1291 *ipp = peer->rap_ip;
1292 *portp = peer->rap_port;
1293 *persistencep = peer->rap_persistence;
1295 read_unlock(&kranal_data.kra_global_lock);
1300 read_unlock(&kranal_data.kra_global_lock);
1305 kranal_add_persistent_peer (ptl_nid_t nid, __u32 ip, int port)
1307 unsigned long flags;
1311 if (nid == PTL_NID_ANY)
1314 peer = kranal_create_peer(nid);
1318 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
1320 peer2 = kranal_find_peer_locked(nid);
1321 if (peer2 != NULL) {
1322 kranal_peer_decref(peer);
1325 /* peer table takes existing ref on peer */
1326 list_add_tail(&peer->rap_list,
1327 kranal_nid2peerlist(nid));
1331 peer->rap_port = port;
1332 peer->rap_persistence++;
1334 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
1339 kranal_del_peer_locked (kra_peer_t *peer, int single_share)
1341 struct list_head *ctmp;
1342 struct list_head *cnxt;
1346 peer->rap_persistence = 0;
1347 else if (peer->rap_persistence > 0)
1348 peer->rap_persistence--;
1350 if (peer->rap_persistence != 0)
1353 if (list_empty(&peer->rap_conns)) {
1354 kranal_unlink_peer_locked(peer);
1356 list_for_each_safe(ctmp, cnxt, &peer->rap_conns) {
1357 conn = list_entry(ctmp, kra_conn_t, rac_list);
1359 kranal_close_conn_locked(conn, 0);
1361 /* peer unlinks itself when last conn is closed */
1366 kranal_del_peer (ptl_nid_t nid, int single_share)
1368 unsigned long flags;
1369 struct list_head *ptmp;
1370 struct list_head *pnxt;
1377 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
1379 if (nid != PTL_NID_ANY)
1380 lo = hi = kranal_nid2peerlist(nid) - kranal_data.kra_peers;
1383 hi = kranal_data.kra_peer_hash_size - 1;
1386 for (i = lo; i <= hi; i++) {
1387 list_for_each_safe (ptmp, pnxt, &kranal_data.kra_peers[i]) {
1388 peer = list_entry(ptmp, kra_peer_t, rap_list);
1389 LASSERT (peer->rap_persistence > 0 ||
1390 !list_empty(&peer->rap_conns));
1392 if (!(nid == PTL_NID_ANY || peer->rap_nid == nid))
1395 kranal_del_peer_locked(peer, single_share);
1396 rc = 0; /* matched something */
1403 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
1409 kranal_get_conn_by_idx (int index)
1412 struct list_head *ptmp;
1414 struct list_head *ctmp;
1417 read_lock (&kranal_data.kra_global_lock);
1419 for (i = 0; i < kranal_data.kra_peer_hash_size; i++) {
1420 list_for_each (ptmp, &kranal_data.kra_peers[i]) {
1422 peer = list_entry(ptmp, kra_peer_t, rap_list);
1423 LASSERT (peer->rap_persistence > 0 ||
1424 !list_empty(&peer->rap_conns));
1426 list_for_each (ctmp, &peer->rap_conns) {
1430 conn = list_entry(ctmp, kra_conn_t, rac_list);
1431 CDEBUG(D_NET, "++conn[%p] -> "LPX64" (%d)\n",
1432 conn, conn->rac_peer->rap_nid,
1433 atomic_read(&conn->rac_refcount));
1434 atomic_inc(&conn->rac_refcount);
1435 read_unlock(&kranal_data.kra_global_lock);
1441 read_unlock(&kranal_data.kra_global_lock);
1446 kranal_close_peer_conns_locked (kra_peer_t *peer, int why)
1449 struct list_head *ctmp;
1450 struct list_head *cnxt;
1453 list_for_each_safe (ctmp, cnxt, &peer->rap_conns) {
1454 conn = list_entry(ctmp, kra_conn_t, rac_list);
1457 kranal_close_conn_locked(conn, why);
1464 kranal_close_matching_conns (ptl_nid_t nid)
1466 unsigned long flags;
1468 struct list_head *ptmp;
1469 struct list_head *pnxt;
1475 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
1477 if (nid != PTL_NID_ANY)
1478 lo = hi = kranal_nid2peerlist(nid) - kranal_data.kra_peers;
1481 hi = kranal_data.kra_peer_hash_size - 1;
1484 for (i = lo; i <= hi; i++) {
1485 list_for_each_safe (ptmp, pnxt, &kranal_data.kra_peers[i]) {
1487 peer = list_entry(ptmp, kra_peer_t, rap_list);
1488 LASSERT (peer->rap_persistence > 0 ||
1489 !list_empty(&peer->rap_conns));
1491 if (!(nid == PTL_NID_ANY || nid == peer->rap_nid))
1494 count += kranal_close_peer_conns_locked(peer, 0);
1498 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
1500 /* wildcards always succeed */
1501 if (nid == PTL_NID_ANY)
1504 return (count == 0) ? -ENOENT : 0;
1508 kranal_cmd(struct portals_cfg *pcfg, void * private)
1512 LASSERT (pcfg != NULL);
1514 switch(pcfg->pcfg_command) {
1515 case NAL_CMD_GET_PEER: {
1519 int share_count = 0;
1521 rc = kranal_get_peer_info(pcfg->pcfg_count,
1522 &nid, &ip, &port, &share_count);
1523 pcfg->pcfg_nid = nid;
1524 pcfg->pcfg_size = 0;
1526 pcfg->pcfg_misc = port;
1527 pcfg->pcfg_count = 0;
1528 pcfg->pcfg_wait = share_count;
1531 case NAL_CMD_ADD_PEER: {
1532 rc = kranal_add_persistent_peer(pcfg->pcfg_nid,
1533 pcfg->pcfg_id, /* IP */
1534 pcfg->pcfg_misc); /* port */
1537 case NAL_CMD_DEL_PEER: {
1538 rc = kranal_del_peer(pcfg->pcfg_nid,
1539 /* flags == single_share */
1540 pcfg->pcfg_flags != 0);
1543 case NAL_CMD_GET_CONN: {
1544 kra_conn_t *conn = kranal_get_conn_by_idx(pcfg->pcfg_count);
1550 pcfg->pcfg_nid = conn->rac_peer->rap_nid;
1552 pcfg->pcfg_misc = 0;
1553 pcfg->pcfg_flags = 0;
1554 kranal_conn_decref(conn);
1558 case NAL_CMD_CLOSE_CONNECTION: {
1559 rc = kranal_close_matching_conns(pcfg->pcfg_nid);
1562 case NAL_CMD_REGISTER_MYNID: {
1563 if (pcfg->pcfg_nid == PTL_NID_ANY)
1566 rc = kranal_set_mynid(pcfg->pcfg_nid);
1575 kranal_free_txdescs(struct list_head *freelist)
1579 while (!list_empty(freelist)) {
1580 tx = list_entry(freelist->next, kra_tx_t, tx_list);
1582 list_del(&tx->tx_list);
1583 PORTAL_FREE(tx->tx_phys, PTL_MD_MAX_IOV * sizeof(*tx->tx_phys));
1584 PORTAL_FREE(tx, sizeof(*tx));
1589 kranal_alloc_txdescs(struct list_head *freelist, int n)
1591 int isnblk = (freelist == &kranal_data.kra_idle_nblk_txs);
1595 LASSERT (freelist == &kranal_data.kra_idle_txs ||
1596 freelist == &kranal_data.kra_idle_nblk_txs);
1597 LASSERT (list_empty(freelist));
1599 for (i = 0; i < n; i++) {
1601 PORTAL_ALLOC(tx, sizeof(*tx));
1603 CERROR("Can't allocate %stx[%d]\n",
1604 isnblk ? "nblk " : "", i);
1605 kranal_free_txdescs(freelist);
1609 PORTAL_ALLOC(tx->tx_phys,
1610 PTL_MD_MAX_IOV * sizeof(*tx->tx_phys));
1611 if (tx->tx_phys == NULL) {
1612 CERROR("Can't allocate %stx[%d]->tx_phys\n",
1613 isnblk ? "nblk " : "", i);
1615 PORTAL_FREE(tx, sizeof(*tx));
1616 kranal_free_txdescs(freelist);
1620 tx->tx_isnblk = isnblk;
1621 tx->tx_buftype = RANAL_BUF_NONE;
1622 tx->tx_msg.ram_type = RANAL_MSG_NONE;
1624 list_add(&tx->tx_list, freelist);
1631 kranal_device_init(int id, kra_device_t *dev)
1633 const int total_ntx = RANAL_NTX + RANAL_NTX_NBLK;
1637 rrc = RapkGetDeviceByIndex(id, kranal_device_callback,
1639 if (rrc != RAP_SUCCESS) {
1640 CERROR("Can't get Rapidarray Device %d: %d\n", id, rrc);
1644 rrc = RapkReserveRdma(dev->rad_handle, total_ntx);
1645 if (rrc != RAP_SUCCESS) {
1646 CERROR("Can't reserve %d RDMA descriptors"
1647 " for device %d: %d\n", total_ntx, id, rrc);
1651 rrc = RapkCreatePtag(dev->rad_handle,
1653 if (rrc != RAP_SUCCESS) {
1654 CERROR("Can't create ptag"
1655 " for device %d: %d\n", id, rrc);
1659 rrc = RapkCreateCQ(dev->rad_handle, total_ntx, dev->rad_ptag,
1661 if (rrc != RAP_SUCCESS) {
1662 CERROR("Can't create rdma cq size %d"
1663 " for device %d: %d\n", total_ntx, id, rrc);
1667 rrc = RapkCreateCQ(dev->rad_handle, RANAL_FMA_CQ_SIZE,
1668 dev->rad_ptag, &dev->rad_fma_cq);
1669 if (rrc != RAP_SUCCESS) {
1670 CERROR("Can't create fma cq size %d"
1671 " for device %d: %d\n", RANAL_FMA_CQ_SIZE, id, rrc);
1678 RapkDestroyCQ(dev->rad_handle, dev->rad_rdma_cq, dev->rad_ptag);
1680 RapkDestroyPtag(dev->rad_handle, dev->rad_ptag);
1682 RapkReleaseDevice(dev->rad_handle);
1688 kranal_device_fini(kra_device_t *dev)
1690 LASSERT(dev->rad_scheduler == NULL);
1691 RapkDestroyCQ(dev->rad_handle, dev->rad_fma_cq, dev->rad_ptag);
1692 RapkDestroyCQ(dev->rad_handle, dev->rad_rdma_cq, dev->rad_ptag);
1693 RapkDestroyPtag(dev->rad_handle, dev->rad_ptag);
1694 RapkReleaseDevice(dev->rad_handle);
1698 kranal_api_shutdown (nal_t *nal)
1701 unsigned long flags;
1703 if (nal->nal_refct != 0) {
1704 /* This module got the first ref */
1705 PORTAL_MODULE_UNUSE;
1709 CDEBUG(D_MALLOC, "before NAL cleanup: kmem %d\n",
1710 atomic_read(&portal_kmemory));
1712 LASSERT (nal == &kranal_api);
1714 switch (kranal_data.kra_init) {
1716 CERROR("Unexpected state %d\n", kranal_data.kra_init);
1719 case RANAL_INIT_ALL:
1720 /* stop calls to nal_cmd */
1721 libcfs_nal_cmd_unregister(RANAL);
1722 /* No new persistent peers */
1724 /* resetting my NID to unadvertises me, removes my
1725 * listener and nukes all current peers */
1726 kranal_set_mynid(PTL_NID_ANY);
1727 /* no new peers or conns */
1729 /* Wait for all peer/conn state to clean up */
1731 while (atomic_read(&kranal_data.kra_nconns) != 0 ||
1732 atomic_read(&kranal_data.kra_npeers) != 0) {
1734 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* power of 2? */
1735 "waiting for %d peers and %d conns to close down\n",
1736 atomic_read(&kranal_data.kra_npeers),
1737 atomic_read(&kranal_data.kra_nconns));
1742 case RANAL_INIT_LIB:
1743 lib_fini(&kranal_lib);
1746 case RANAL_INIT_DATA:
1750 /* flag threads to terminate; wake and wait for them to die */
1751 kranal_data.kra_shutdown = 1;
1753 for (i = 0; i < kranal_data.kra_ndevs; i++) {
1754 kra_device_t *dev = &kranal_data.kra_devices[i];
1756 LASSERT (list_empty(&dev->rad_connq));
1758 spin_lock_irqsave(&dev->rad_lock, flags);
1759 wake_up(&dev->rad_waitq);
1760 spin_unlock_irqrestore(&dev->rad_lock, flags);
1763 spin_lock_irqsave(&kranal_data.kra_reaper_lock, flags);
1764 wake_up_all(&kranal_data.kra_reaper_waitq);
1765 spin_unlock_irqrestore(&kranal_data.kra_reaper_lock, flags);
1767 LASSERT (list_empty(&kranal_data.kra_connd_peers));
1768 spin_lock_irqsave(&kranal_data.kra_connd_lock, flags);
1769 wake_up_all(&kranal_data.kra_connd_waitq);
1770 spin_unlock_irqrestore(&kranal_data.kra_connd_lock, flags);
1773 while (atomic_read(&kranal_data.kra_nthreads) != 0) {
1775 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* power of 2? */
1776 "Waiting for %d threads to terminate\n",
1777 atomic_read(&kranal_data.kra_nthreads));
1781 LASSERT (atomic_read(&kranal_data.kra_npeers) == 0);
1782 if (kranal_data.kra_peers != NULL) {
1783 for (i = 0; i < kranal_data.kra_peer_hash_size; i++)
1784 LASSERT (list_empty(&kranal_data.kra_peers[i]));
1786 PORTAL_FREE(kranal_data.kra_peers,
1787 sizeof (struct list_head) *
1788 kranal_data.kra_peer_hash_size);
1791 LASSERT (atomic_read(&kranal_data.kra_nconns) == 0);
1792 if (kranal_data.kra_conns != NULL) {
1793 for (i = 0; i < kranal_data.kra_conn_hash_size; i++)
1794 LASSERT (list_empty(&kranal_data.kra_conns[i]));
1796 PORTAL_FREE(kranal_data.kra_conns,
1797 sizeof (struct list_head) *
1798 kranal_data.kra_conn_hash_size);
1801 for (i = 0; i < kranal_data.kra_ndevs; i++)
1802 kranal_device_fini(&kranal_data.kra_devices[i]);
1804 kranal_free_txdescs(&kranal_data.kra_idle_txs);
1805 kranal_free_txdescs(&kranal_data.kra_idle_nblk_txs);
1807 CDEBUG(D_MALLOC, "after NAL cleanup: kmem %d\n",
1808 atomic_read(&portal_kmemory));
1809 printk(KERN_INFO "Lustre: RapidArray NAL unloaded (final mem %d)\n",
1810 atomic_read(&portal_kmemory));
1812 kranal_data.kra_init = RANAL_INIT_NOTHING;
1816 kranal_api_startup (nal_t *nal, ptl_pid_t requested_pid,
1817 ptl_ni_limits_t *requested_limits,
1818 ptl_ni_limits_t *actual_limits)
1820 static int device_ids[] = {RAPK_MAIN_DEVICE_ID,
1821 RAPK_EXPANSION_DEVICE_ID};
1823 ptl_process_id_t process_id;
1824 int pkmem = atomic_read(&portal_kmemory);
1829 LASSERT (nal == &kranal_api);
1831 if (nal->nal_refct != 0) {
1832 if (actual_limits != NULL)
1833 *actual_limits = kranal_lib.libnal_ni.ni_actual_limits;
1834 /* This module got the first ref */
1839 LASSERT (kranal_data.kra_init == RANAL_INIT_NOTHING);
1841 memset(&kranal_data, 0, sizeof(kranal_data)); /* zero pointers, flags etc */
1843 /* CAVEAT EMPTOR: Every 'Fma' message includes the sender's NID and
1844 * a unique (for all time) connstamp so we can uniquely identify
1845 * the sender. The connstamp is an incrementing counter
1846 * initialised with seconds + microseconds at startup time. So we
1847 * rely on NOT creating connections more frequently on average than
1848 * 1MHz to ensure we don't use old connstamps when we reboot. */
1849 do_gettimeofday(&tv);
1850 kranal_data.kra_connstamp =
1851 kranal_data.kra_peerstamp = (((__u64)tv.tv_sec) * 1000000) + tv.tv_usec;
1853 init_MUTEX(&kranal_data.kra_nid_mutex);
1854 init_MUTEX_LOCKED(&kranal_data.kra_listener_signal);
1856 rwlock_init(&kranal_data.kra_global_lock);
1858 for (i = 0; i < RANAL_MAXDEVS; i++ ) {
1859 kra_device_t *dev = &kranal_data.kra_devices[i];
1862 INIT_LIST_HEAD(&dev->rad_connq);
1863 init_waitqueue_head(&dev->rad_waitq);
1864 spin_lock_init(&dev->rad_lock);
1867 kranal_data.kra_new_min_timeout = MAX_SCHEDULE_TIMEOUT;
1868 init_waitqueue_head(&kranal_data.kra_reaper_waitq);
1869 spin_lock_init(&kranal_data.kra_reaper_lock);
1871 INIT_LIST_HEAD(&kranal_data.kra_connd_peers);
1872 init_waitqueue_head(&kranal_data.kra_connd_waitq);
1873 spin_lock_init(&kranal_data.kra_connd_lock);
1875 INIT_LIST_HEAD(&kranal_data.kra_idle_txs);
1876 INIT_LIST_HEAD(&kranal_data.kra_idle_nblk_txs);
1877 init_waitqueue_head(&kranal_data.kra_idle_tx_waitq);
1878 spin_lock_init(&kranal_data.kra_tx_lock);
1880 /* OK to call kranal_api_shutdown() to cleanup now */
1881 kranal_data.kra_init = RANAL_INIT_DATA;
1883 kranal_data.kra_peer_hash_size = RANAL_PEER_HASH_SIZE;
1884 PORTAL_ALLOC(kranal_data.kra_peers,
1885 sizeof(struct list_head) * kranal_data.kra_peer_hash_size);
1886 if (kranal_data.kra_peers == NULL)
1889 for (i = 0; i < kranal_data.kra_peer_hash_size; i++)
1890 INIT_LIST_HEAD(&kranal_data.kra_peers[i]);
1892 kranal_data.kra_conn_hash_size = RANAL_PEER_HASH_SIZE;
1893 PORTAL_ALLOC(kranal_data.kra_conns,
1894 sizeof(struct list_head) * kranal_data.kra_conn_hash_size);
1895 if (kranal_data.kra_conns == NULL)
1898 for (i = 0; i < kranal_data.kra_conn_hash_size; i++)
1899 INIT_LIST_HEAD(&kranal_data.kra_conns[i]);
1901 rc = kranal_alloc_txdescs(&kranal_data.kra_idle_txs, RANAL_NTX);
1905 rc = kranal_alloc_txdescs(&kranal_data.kra_idle_nblk_txs,RANAL_NTX_NBLK);
1909 process_id.pid = requested_pid;
1910 process_id.nid = PTL_NID_ANY; /* don't know my NID yet */
1912 rc = lib_init(&kranal_lib, nal, process_id,
1913 requested_limits, actual_limits);
1915 CERROR("lib_init failed: error %d\n", rc);
1919 /* lib interface initialised */
1920 kranal_data.kra_init = RANAL_INIT_LIB;
1921 /*****************************************************/
1923 rc = kranal_thread_start(kranal_reaper, NULL);
1925 CERROR("Can't spawn ranal reaper: %d\n", rc);
1929 for (i = 0; i < RANAL_N_CONND; i++) {
1930 rc = kranal_thread_start(kranal_connd, (void *)i);
1932 CERROR("Can't spawn ranal connd[%d]: %d\n",
1938 LASSERT(kranal_data.kra_ndevs == 0);
1939 for (i = 0; i < sizeof(device_ids)/sizeof(device_ids[0]); i++) {
1940 dev = &kranal_data.kra_devices[kranal_data.kra_ndevs];
1942 rc = kranal_device_init(device_ids[i], dev);
1944 kranal_data.kra_ndevs++;
1946 rc = kranal_thread_start(kranal_scheduler, dev);
1948 CERROR("Can't spawn ranal scheduler[%d]: %d\n",
1954 if (kranal_data.kra_ndevs == 0)
1957 rc = libcfs_nal_cmd_register(RANAL, &kranal_cmd, NULL);
1959 CERROR("Can't initialise command interface (rc = %d)\n", rc);
1963 /* flag everything initialised */
1964 kranal_data.kra_init = RANAL_INIT_ALL;
1965 /*****************************************************/
1967 CDEBUG(D_MALLOC, "initial kmem %d\n", atomic_read(&portal_kmemory));
1968 printk(KERN_INFO "Lustre: RapidArray NAL loaded "
1969 "(initial mem %d)\n", pkmem);
1974 kranal_api_shutdown(&kranal_api);
1979 kranal_module_fini (void)
1981 #ifdef CONFIG_SYSCTL
1982 if (kranal_tunables.kra_sysctl != NULL)
1983 unregister_sysctl_table(kranal_tunables.kra_sysctl);
1985 PtlNIFini(kranal_ni);
1987 ptl_unregister_nal(RANAL);
1991 kranal_module_init (void)
1995 /* the following must be sizeof(int) for
1996 * proc_dointvec/kranal_listener_procint() */
1997 LASSERT (sizeof(kranal_tunables.kra_timeout) == sizeof(int));
1998 LASSERT (sizeof(kranal_tunables.kra_listener_timeout) == sizeof(int));
1999 LASSERT (sizeof(kranal_tunables.kra_backlog) == sizeof(int));
2000 LASSERT (sizeof(kranal_tunables.kra_port) == sizeof(int));
2001 LASSERT (sizeof(kranal_tunables.kra_max_immediate) == sizeof(int));
2003 kranal_api.nal_ni_init = kranal_api_startup;
2004 kranal_api.nal_ni_fini = kranal_api_shutdown;
2006 /* Initialise dynamic tunables to defaults once only */
2007 kranal_tunables.kra_timeout = RANAL_TIMEOUT;
2009 rc = ptl_register_nal(RANAL, &kranal_api);
2011 CERROR("Can't register RANAL: %d\n", rc);
2012 return -ENOMEM; /* or something... */
2015 /* Pure gateways want the NAL started up at module load time... */
2016 rc = PtlNIInit(RANAL, LUSTRE_SRV_PTL_PID, NULL, NULL, &kranal_ni);
2017 if (rc != PTL_OK && rc != PTL_IFACE_DUP) {
2018 ptl_unregister_nal(RANAL);
2022 #ifdef CONFIG_SYSCTL
2023 /* Press on regardless even if registering sysctl doesn't work */
2024 kranal_tunables.kra_sysctl =
2025 register_sysctl_table(kranal_top_ctl_table, 0);
2030 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
2031 MODULE_DESCRIPTION("Kernel RapidArray NAL v0.01");
2032 MODULE_LICENSE("GPL");
2034 module_init(kranal_module_init);
2035 module_exit(kranal_module_fini);