2 * -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
3 * vim:expandtab:shiftwidth=8:tabstop=8:
7 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 only,
11 * as published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License version 2 for more details (a copy is included
17 * in the LICENSE file that accompanied this code).
19 * You should have received a copy of the GNU General Public License
20 * version 2 along with this program; If not, see [sun.com URL with a
23 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
24 * CA 95054 USA or visit www.sun.com if you need additional information or
30 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
31 * Use is subject to license terms.
34 * This file is part of Lustre, http://www.lustre.org/
35 * Lustre is a trademark of Sun Microsystems, Inc.
37 * lnet/klnds/ralnd/ralnd.c
39 * Author: Eric Barton <eric@bartonsoftware.com>
43 static int kranal_devids[RANAL_MAXDEVS] = {RAPK_MAIN_DEVICE_ID,
44 RAPK_EXPANSION_DEVICE_ID};
48 .lnd_startup = kranal_startup,
49 .lnd_shutdown = kranal_shutdown,
50 .lnd_ctl = kranal_ctl,
51 .lnd_send = kranal_send,
52 .lnd_recv = kranal_recv,
53 .lnd_eager_recv = kranal_eager_recv,
54 .lnd_accept = kranal_accept,
57 kra_data_t kranal_data;
60 kranal_pack_connreq(kra_connreq_t *connreq, kra_conn_t *conn, lnet_nid_t dstnid)
64 memset(connreq, 0, sizeof(*connreq));
66 connreq->racr_magic = RANAL_MSG_MAGIC;
67 connreq->racr_version = RANAL_MSG_VERSION;
69 if (conn == NULL) /* prepping a "stub" reply */
72 connreq->racr_devid = conn->rac_device->rad_id;
73 connreq->racr_srcnid = lnet_ptlcompat_srcnid(kranal_data.kra_ni->ni_nid,
75 connreq->racr_dstnid = dstnid;
76 connreq->racr_peerstamp = kranal_data.kra_peerstamp;
77 connreq->racr_connstamp = conn->rac_my_connstamp;
78 connreq->racr_timeout = conn->rac_timeout;
80 rrc = RapkGetRiParams(conn->rac_rihandle, &connreq->racr_riparams);
81 LASSERT(rrc == RAP_SUCCESS);
85 kranal_recv_connreq(struct socket *sock, kra_connreq_t *connreq, int active)
87 int timeout = active ? *kranal_tunables.kra_timeout :
88 lnet_acceptor_timeout();
92 /* return 0 on success, -ve on error, +ve to tell the peer I'm "old" */
94 rc = libcfs_sock_read(sock, &connreq->racr_magic,
95 sizeof(connreq->racr_magic), timeout);
97 CERROR("Read(magic) failed(1): %d\n", rc);
101 if (connreq->racr_magic != RANAL_MSG_MAGIC &&
102 connreq->racr_magic != __swab32(RANAL_MSG_MAGIC)) {
103 /* Unexpected magic! */
105 the_lnet.ln_ptlcompat == 0 &&
106 (connreq->racr_magic == LNET_PROTO_MAGIC ||
107 connreq->racr_magic == __swab32(LNET_PROTO_MAGIC))) {
108 /* future protocol version compatibility!
109 * When LNET unifies protocols over all LNDs, the first
110 * thing sent will be a version query. +ve rc means I
111 * reply with my current magic/version */
116 the_lnet.ln_ptlcompat == 0) {
117 CERROR("Unexpected magic %08x (1)\n",
118 connreq->racr_magic);
122 /* When portals compatibility is set, I may be passed a new
123 * connection "blindly" by the acceptor, and I have to
124 * determine if my peer has sent an acceptor connection request
125 * or not. This isn't a connreq, so I'll get the acceptor to
127 rc = lnet_accept(kranal_data.kra_ni, sock, connreq->racr_magic);
131 /* ...and if it's OK I'm back to looking for a connreq... */
132 rc = libcfs_sock_read(sock, &connreq->racr_magic,
133 sizeof(connreq->racr_magic), timeout);
135 CERROR("Read(magic) failed(2): %d\n", rc);
139 if (connreq->racr_magic != RANAL_MSG_MAGIC &&
140 connreq->racr_magic != __swab32(RANAL_MSG_MAGIC)) {
141 CERROR("Unexpected magic %08x(2)\n",
142 connreq->racr_magic);
147 swab = (connreq->racr_magic == __swab32(RANAL_MSG_MAGIC));
149 rc = libcfs_sock_read(sock, &connreq->racr_version,
150 sizeof(connreq->racr_version), timeout);
152 CERROR("Read(version) failed: %d\n", rc);
157 __swab16s(&connreq->racr_version);
159 if (connreq->racr_version != RANAL_MSG_VERSION) {
161 CERROR("Unexpected version %d\n", connreq->racr_version);
164 /* If this is a future version of the ralnd protocol, and I'm
165 * passive (accepted the connection), tell my peer I'm "old"
170 rc = libcfs_sock_read(sock, &connreq->racr_devid,
171 sizeof(connreq->racr_version) -
172 offsetof(kra_connreq_t, racr_devid),
175 CERROR("Read(body) failed: %d\n", rc);
180 __swab32s(&connreq->racr_magic);
181 __swab16s(&connreq->racr_version);
182 __swab16s(&connreq->racr_devid);
183 __swab64s(&connreq->racr_srcnid);
184 __swab64s(&connreq->racr_dstnid);
185 __swab64s(&connreq->racr_peerstamp);
186 __swab64s(&connreq->racr_connstamp);
187 __swab32s(&connreq->racr_timeout);
189 __swab32s(&connreq->racr_riparams.HostId);
190 __swab32s(&connreq->racr_riparams.FmaDomainHndl);
191 __swab32s(&connreq->racr_riparams.PTag);
192 __swab32s(&connreq->racr_riparams.CompletionCookie);
195 if (connreq->racr_srcnid == LNET_NID_ANY ||
196 connreq->racr_dstnid == LNET_NID_ANY) {
197 CERROR("Received LNET_NID_ANY\n");
201 if (connreq->racr_timeout < RANAL_MIN_TIMEOUT) {
202 CERROR("Received timeout %d < MIN %d\n",
203 connreq->racr_timeout, RANAL_MIN_TIMEOUT);
211 kranal_close_stale_conns_locked (kra_peer_t *peer, kra_conn_t *newconn)
214 struct list_head *ctmp;
215 struct list_head *cnxt;
219 loopback = peer->rap_nid == kranal_data.kra_ni->ni_nid;
221 list_for_each_safe (ctmp, cnxt, &peer->rap_conns) {
222 conn = list_entry(ctmp, kra_conn_t, rac_list);
227 if (conn->rac_peerstamp != newconn->rac_peerstamp) {
228 CDEBUG(D_NET, "Closing stale conn nid: %s "
229 " peerstamp:"LPX64"("LPX64")\n",
230 libcfs_nid2str(peer->rap_nid),
231 conn->rac_peerstamp, newconn->rac_peerstamp);
232 LASSERT (conn->rac_peerstamp < newconn->rac_peerstamp);
234 kranal_close_conn_locked(conn, -ESTALE);
238 if (conn->rac_device != newconn->rac_device)
242 newconn->rac_my_connstamp == conn->rac_peer_connstamp &&
243 newconn->rac_peer_connstamp == conn->rac_my_connstamp)
246 LASSERT (conn->rac_peer_connstamp < newconn->rac_peer_connstamp);
248 CDEBUG(D_NET, "Closing stale conn nid: %s"
249 " connstamp:"LPX64"("LPX64")\n",
250 libcfs_nid2str(peer->rap_nid),
251 conn->rac_peer_connstamp, newconn->rac_peer_connstamp);
254 kranal_close_conn_locked(conn, -ESTALE);
261 kranal_conn_isdup_locked(kra_peer_t *peer, kra_conn_t *newconn)
264 struct list_head *tmp;
267 loopback = peer->rap_nid == kranal_data.kra_ni->ni_nid;
269 list_for_each(tmp, &peer->rap_conns) {
270 conn = list_entry(tmp, kra_conn_t, rac_list);
272 /* 'newconn' is from an earlier version of 'peer'!!! */
273 if (newconn->rac_peerstamp < conn->rac_peerstamp)
276 /* 'conn' is from an earlier version of 'peer': it will be
277 * removed when we cull stale conns later on... */
278 if (newconn->rac_peerstamp > conn->rac_peerstamp)
281 /* Different devices are OK */
282 if (conn->rac_device != newconn->rac_device)
285 /* It's me connecting to myself */
287 newconn->rac_my_connstamp == conn->rac_peer_connstamp &&
288 newconn->rac_peer_connstamp == conn->rac_my_connstamp)
291 /* 'newconn' is an earlier connection from 'peer'!!! */
292 if (newconn->rac_peer_connstamp < conn->rac_peer_connstamp)
295 /* 'conn' is an earlier connection from 'peer': it will be
296 * removed when we cull stale conns later on... */
297 if (newconn->rac_peer_connstamp > conn->rac_peer_connstamp)
300 /* 'newconn' has the SAME connection stamp; 'peer' isn't
301 * playing the game... */
309 kranal_set_conn_uniqueness (kra_conn_t *conn)
313 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
315 conn->rac_my_connstamp = kranal_data.kra_connstamp++;
317 do { /* allocate a unique cqid */
318 conn->rac_cqid = kranal_data.kra_next_cqid++;
319 } while (kranal_cqid2conn_locked(conn->rac_cqid) != NULL);
321 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
325 kranal_create_conn(kra_conn_t **connp, kra_device_t *dev)
330 LASSERT (!in_interrupt());
331 LIBCFS_ALLOC(conn, sizeof(*conn));
336 memset(conn, 0, sizeof(*conn));
337 atomic_set(&conn->rac_refcount, 1);
338 INIT_LIST_HEAD(&conn->rac_list);
339 INIT_LIST_HEAD(&conn->rac_hashlist);
340 INIT_LIST_HEAD(&conn->rac_schedlist);
341 INIT_LIST_HEAD(&conn->rac_fmaq);
342 INIT_LIST_HEAD(&conn->rac_rdmaq);
343 INIT_LIST_HEAD(&conn->rac_replyq);
344 spin_lock_init(&conn->rac_lock);
346 kranal_set_conn_uniqueness(conn);
348 conn->rac_device = dev;
349 conn->rac_timeout = MAX(*kranal_tunables.kra_timeout, RANAL_MIN_TIMEOUT);
350 kranal_update_reaper_timeout(conn->rac_timeout);
352 rrc = RapkCreateRi(dev->rad_handle, conn->rac_cqid,
353 &conn->rac_rihandle);
354 if (rrc != RAP_SUCCESS) {
355 CERROR("RapkCreateRi failed: %d\n", rrc);
356 LIBCFS_FREE(conn, sizeof(*conn));
360 atomic_inc(&kranal_data.kra_nconns);
366 kranal_destroy_conn(kra_conn_t *conn)
370 LASSERT (!in_interrupt());
371 LASSERT (!conn->rac_scheduled);
372 LASSERT (list_empty(&conn->rac_list));
373 LASSERT (list_empty(&conn->rac_hashlist));
374 LASSERT (list_empty(&conn->rac_schedlist));
375 LASSERT (atomic_read(&conn->rac_refcount) == 0);
376 LASSERT (list_empty(&conn->rac_fmaq));
377 LASSERT (list_empty(&conn->rac_rdmaq));
378 LASSERT (list_empty(&conn->rac_replyq));
380 rrc = RapkDestroyRi(conn->rac_device->rad_handle,
382 LASSERT (rrc == RAP_SUCCESS);
384 if (conn->rac_peer != NULL)
385 kranal_peer_decref(conn->rac_peer);
387 LIBCFS_FREE(conn, sizeof(*conn));
388 atomic_dec(&kranal_data.kra_nconns);
392 kranal_terminate_conn_locked (kra_conn_t *conn)
394 LASSERT (!in_interrupt());
395 LASSERT (conn->rac_state == RANAL_CONN_CLOSING);
396 LASSERT (!list_empty(&conn->rac_hashlist));
397 LASSERT (list_empty(&conn->rac_list));
399 /* Remove from conn hash table: no new callbacks */
400 list_del_init(&conn->rac_hashlist);
401 kranal_conn_decref(conn);
403 conn->rac_state = RANAL_CONN_CLOSED;
405 /* schedule to clear out all uncompleted comms in context of dev's
407 kranal_schedule_conn(conn);
411 kranal_close_conn_locked (kra_conn_t *conn, int error)
413 kra_peer_t *peer = conn->rac_peer;
415 CDEBUG(error == 0 ? D_NET : D_NETERROR,
416 "closing conn to %s: error %d\n",
417 libcfs_nid2str(peer->rap_nid), error);
419 LASSERT (!in_interrupt());
420 LASSERT (conn->rac_state == RANAL_CONN_ESTABLISHED);
421 LASSERT (!list_empty(&conn->rac_hashlist));
422 LASSERT (!list_empty(&conn->rac_list));
424 list_del_init(&conn->rac_list);
426 if (list_empty(&peer->rap_conns) &&
427 peer->rap_persistence == 0) {
428 /* Non-persistent peer with no more conns... */
429 kranal_unlink_peer_locked(peer);
432 /* Reset RX timeout to ensure we wait for an incoming CLOSE for the
433 * full timeout. If we get a CLOSE we know the peer has stopped all
434 * RDMA. Otherwise if we wait for the full timeout we can also be sure
435 * all RDMA has stopped. */
436 conn->rac_last_rx = jiffies;
439 conn->rac_state = RANAL_CONN_CLOSING;
440 kranal_schedule_conn(conn); /* schedule sending CLOSE */
442 kranal_conn_decref(conn); /* lose peer's ref */
446 kranal_close_conn (kra_conn_t *conn, int error)
451 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
453 if (conn->rac_state == RANAL_CONN_ESTABLISHED)
454 kranal_close_conn_locked(conn, error);
456 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
460 kranal_set_conn_params(kra_conn_t *conn, kra_connreq_t *connreq,
461 __u32 peer_ip, int peer_port)
463 kra_device_t *dev = conn->rac_device;
467 /* CAVEAT EMPTOR: we're really overloading rac_last_tx + rac_keepalive
468 * to do RapkCompleteSync() timekeeping (see kibnal_scheduler). */
469 conn->rac_last_tx = jiffies;
470 conn->rac_keepalive = 0;
472 rrc = RapkSetRiParams(conn->rac_rihandle, &connreq->racr_riparams);
473 if (rrc != RAP_SUCCESS) {
474 CERROR("Error setting riparams from %u.%u.%u.%u/%d: %d\n",
475 HIPQUAD(peer_ip), peer_port, rrc);
476 return -ECONNABORTED;
479 /* Schedule conn on rad_new_conns */
480 kranal_conn_addref(conn);
481 spin_lock_irqsave(&dev->rad_lock, flags);
482 list_add_tail(&conn->rac_schedlist, &dev->rad_new_conns);
483 wake_up(&dev->rad_waitq);
484 spin_unlock_irqrestore(&dev->rad_lock, flags);
486 rrc = RapkWaitToConnect(conn->rac_rihandle);
487 if (rrc != RAP_SUCCESS) {
488 CERROR("Error waiting to connect to %u.%u.%u.%u/%d: %d\n",
489 HIPQUAD(peer_ip), peer_port, rrc);
490 return -ECONNABORTED;
493 /* Scheduler doesn't touch conn apart from to deschedule and decref it
494 * after RapkCompleteSync() return success, so conn is all mine */
496 conn->rac_peerstamp = connreq->racr_peerstamp;
497 conn->rac_peer_connstamp = connreq->racr_connstamp;
498 conn->rac_keepalive = RANAL_TIMEOUT2KEEPALIVE(connreq->racr_timeout);
499 kranal_update_reaper_timeout(conn->rac_keepalive);
504 kranal_passive_conn_handshake (struct socket *sock, lnet_nid_t *src_nidp,
505 lnet_nid_t *dst_nidp, kra_conn_t **connp)
508 unsigned int peer_port;
509 kra_connreq_t rx_connreq;
510 kra_connreq_t tx_connreq;
516 rc = libcfs_sock_getaddr(sock, 1, &peer_ip, &peer_port);
518 CERROR("Can't get peer's IP: %d\n", rc);
522 rc = kranal_recv_connreq(sock, &rx_connreq, 0);
525 CERROR("Can't rx connreq from %u.%u.%u.%u/%d: %d\n",
526 HIPQUAD(peer_ip), peer_port, rc);
531 /* Request from "new" peer: send reply with my MAGIC/VERSION to
532 * tell her I'm old... */
533 kranal_pack_connreq(&tx_connreq, NULL, LNET_NID_ANY);
535 rc = libcfs_sock_write(sock, &tx_connreq, sizeof(tx_connreq),
536 lnet_acceptor_timeout());
538 CERROR("Can't tx stub connreq to %u.%u.%u.%u/%d: %d\n",
539 HIPQUAD(peer_ip), peer_port, rc);
545 if (i == kranal_data.kra_ndevs) {
546 CERROR("Can't match dev %d from %u.%u.%u.%u/%d\n",
547 rx_connreq.racr_devid, HIPQUAD(peer_ip), peer_port);
550 dev = &kranal_data.kra_devices[i];
551 if (dev->rad_id == rx_connreq.racr_devid)
555 rc = kranal_create_conn(&conn, dev);
559 kranal_pack_connreq(&tx_connreq, conn, rx_connreq.racr_srcnid);
561 rc = libcfs_sock_write(sock, &tx_connreq, sizeof(tx_connreq),
562 lnet_acceptor_timeout());
564 CERROR("Can't tx connreq to %u.%u.%u.%u/%d: %d\n",
565 HIPQUAD(peer_ip), peer_port, rc);
566 kranal_conn_decref(conn);
570 rc = kranal_set_conn_params(conn, &rx_connreq, peer_ip, peer_port);
572 kranal_conn_decref(conn);
577 *src_nidp = rx_connreq.racr_srcnid;
578 *dst_nidp = rx_connreq.racr_dstnid;
583 kranal_active_conn_handshake(kra_peer_t *peer,
584 lnet_nid_t *dst_nidp, kra_conn_t **connp)
586 kra_connreq_t connreq;
593 /* spread connections over all devices using both peer NIDs to ensure
594 * all nids use all devices */
595 idx = peer->rap_nid + kranal_data.kra_ni->ni_nid;
596 dev = &kranal_data.kra_devices[idx % kranal_data.kra_ndevs];
598 rc = kranal_create_conn(&conn, dev);
602 kranal_pack_connreq(&connreq, conn, peer->rap_nid);
604 if (the_lnet.ln_testprotocompat != 0) {
605 /* single-shot proto test */
607 if ((the_lnet.ln_testprotocompat & 1) != 0) {
608 connreq.racr_version++;
609 the_lnet.ln_testprotocompat &= ~1;
611 if ((the_lnet.ln_testprotocompat & 2) != 0) {
612 connreq.racr_magic = LNET_PROTO_MAGIC;
613 the_lnet.ln_testprotocompat &= ~2;
618 rc = lnet_connect(&sock, peer->rap_nid,
619 0, peer->rap_ip, peer->rap_port);
623 /* CAVEAT EMPTOR: the passive side receives with a SHORT rx timeout
624 * immediately after accepting a connection, so we connect and then
625 * send immediately. */
627 rc = libcfs_sock_write(sock, &connreq, sizeof(connreq),
628 lnet_acceptor_timeout());
630 CERROR("Can't tx connreq to %u.%u.%u.%u/%d: %d\n",
631 HIPQUAD(peer->rap_ip), peer->rap_port, rc);
635 rc = kranal_recv_connreq(sock, &connreq, 1);
637 CERROR("Can't rx connreq from %u.%u.%u.%u/%d: %d\n",
638 HIPQUAD(peer->rap_ip), peer->rap_port, rc);
642 libcfs_sock_release(sock);
645 if (connreq.racr_srcnid != peer->rap_nid) {
646 CERROR("Unexpected srcnid from %u.%u.%u.%u/%d: "
647 "received %s expected %s\n",
648 HIPQUAD(peer->rap_ip), peer->rap_port,
649 libcfs_nid2str(connreq.racr_srcnid),
650 libcfs_nid2str(peer->rap_nid));
654 if (connreq.racr_devid != dev->rad_id) {
655 CERROR("Unexpected device id from %u.%u.%u.%u/%d: "
656 "received %d expected %d\n",
657 HIPQUAD(peer->rap_ip), peer->rap_port,
658 connreq.racr_devid, dev->rad_id);
662 rc = kranal_set_conn_params(conn, &connreq,
663 peer->rap_ip, peer->rap_port);
668 *dst_nidp = connreq.racr_dstnid;
672 libcfs_sock_release(sock);
674 lnet_connect_console_error(rc, peer->rap_nid,
675 peer->rap_ip, peer->rap_port);
677 kranal_conn_decref(conn);
682 kranal_conn_handshake (struct socket *sock, kra_peer_t *peer)
695 /* active: connd wants to connect to 'peer' */
696 LASSERT (peer != NULL);
697 LASSERT (peer->rap_connecting);
699 rc = kranal_active_conn_handshake(peer, &dst_nid, &conn);
703 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
705 if (!kranal_peer_active(peer)) {
706 /* raced with peer getting unlinked */
707 write_unlock_irqrestore(&kranal_data.kra_global_lock,
709 kranal_conn_decref(conn);
713 peer_nid = peer->rap_nid;
715 /* passive: listener accepted 'sock' */
716 LASSERT (peer == NULL);
718 rc = kranal_passive_conn_handshake(sock, &peer_nid,
723 /* assume this is a new peer */
724 rc = kranal_create_peer(&peer, peer_nid);
726 CERROR("Can't create conn for %s\n",
727 libcfs_nid2str(peer_nid));
728 kranal_conn_decref(conn);
732 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
734 peer2 = kranal_find_peer_locked(peer_nid);
738 /* peer_nid already in the peer table */
739 kranal_peer_decref(peer);
744 LASSERT ((!new_peer) != (!kranal_peer_active(peer)));
746 /* Refuse connection if peer thinks we are a different NID. We check
747 * this while holding the global lock, to synch with connection
748 * destruction on NID change. */
749 if (!lnet_ptlcompat_matchnid(kranal_data.kra_ni->ni_nid, dst_nid)) {
750 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
752 CERROR("Stale/bad connection with %s: dst_nid %s, expected %s\n",
753 libcfs_nid2str(peer_nid), libcfs_nid2str(dst_nid),
754 libcfs_nid2str(kranal_data.kra_ni->ni_nid));
759 /* Refuse to duplicate an existing connection (both sides might try to
760 * connect at once). NB we return success! We _are_ connected so we
761 * _don't_ have any blocked txs to complete with failure. */
762 rc = kranal_conn_isdup_locked(peer, conn);
764 LASSERT (!list_empty(&peer->rap_conns));
765 LASSERT (list_empty(&peer->rap_tx_queue));
766 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
767 CWARN("Not creating duplicate connection to %s: %d\n",
768 libcfs_nid2str(peer_nid), rc);
774 /* peer table takes my ref on the new peer */
775 list_add_tail(&peer->rap_list,
776 kranal_nid2peerlist(peer_nid));
779 /* initialise timestamps before reaper looks at them */
780 conn->rac_last_tx = conn->rac_last_rx = jiffies;
782 kranal_peer_addref(peer); /* +1 ref for conn */
783 conn->rac_peer = peer;
784 list_add_tail(&conn->rac_list, &peer->rap_conns);
786 kranal_conn_addref(conn); /* +1 ref for conn table */
787 list_add_tail(&conn->rac_hashlist,
788 kranal_cqid2connlist(conn->rac_cqid));
790 /* Schedule all packets blocking for a connection */
791 while (!list_empty(&peer->rap_tx_queue)) {
792 tx = list_entry(peer->rap_tx_queue.next,
795 list_del(&tx->tx_list);
796 kranal_post_fma(conn, tx);
799 nstale = kranal_close_stale_conns_locked(peer, conn);
801 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
803 /* CAVEAT EMPTOR: passive peer can disappear NOW */
806 CWARN("Closed %d stale conns to %s\n", nstale,
807 libcfs_nid2str(peer_nid));
809 CWARN("New connection to %s on devid[%d] = %d\n",
810 libcfs_nid2str(peer_nid),
811 conn->rac_device->rad_idx, conn->rac_device->rad_id);
813 /* Ensure conn gets checked. Transmits may have been queued and an
814 * FMA event may have happened before it got in the cq hash table */
815 kranal_schedule_conn(conn);
820 kranal_peer_decref(peer);
821 kranal_conn_decref(conn);
826 kranal_connect (kra_peer_t *peer)
830 struct list_head zombies;
833 LASSERT (peer->rap_connecting);
835 CDEBUG(D_NET, "About to handshake %s\n",
836 libcfs_nid2str(peer->rap_nid));
838 rc = kranal_conn_handshake(NULL, peer);
840 CDEBUG(D_NET, "Done handshake %s:%d \n",
841 libcfs_nid2str(peer->rap_nid), rc);
843 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
845 LASSERT (peer->rap_connecting);
846 peer->rap_connecting = 0;
849 /* kranal_conn_handshake() queues blocked txs immediately on
850 * success to avoid messages jumping the queue */
851 LASSERT (list_empty(&peer->rap_tx_queue));
853 peer->rap_reconnect_interval = 0; /* OK to reconnect at any time */
855 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
859 peer->rap_reconnect_interval *= 2;
860 peer->rap_reconnect_interval =
861 MAX(peer->rap_reconnect_interval,
862 *kranal_tunables.kra_min_reconnect_interval);
863 peer->rap_reconnect_interval =
864 MIN(peer->rap_reconnect_interval,
865 *kranal_tunables.kra_max_reconnect_interval);
867 peer->rap_reconnect_time = jiffies + peer->rap_reconnect_interval * HZ;
869 /* Grab all blocked packets while we have the global lock */
870 list_add(&zombies, &peer->rap_tx_queue);
871 list_del_init(&peer->rap_tx_queue);
873 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
875 if (list_empty(&zombies))
878 CDEBUG(D_NETERROR, "Dropping packets for %s: connection failed\n",
879 libcfs_nid2str(peer->rap_nid));
882 tx = list_entry(zombies.next, kra_tx_t, tx_list);
884 list_del(&tx->tx_list);
885 kranal_tx_done(tx, -EHOSTUNREACH);
887 } while (!list_empty(&zombies));
891 kranal_free_acceptsock (kra_acceptsock_t *ras)
893 libcfs_sock_release(ras->ras_sock);
894 LIBCFS_FREE(ras, sizeof(*ras));
898 kranal_accept (lnet_ni_t *ni, struct socket *sock)
900 kra_acceptsock_t *ras;
906 rc = libcfs_sock_getaddr(sock, 1, &peer_ip, &peer_port);
907 LASSERT (rc == 0); /* we succeeded before */
909 LIBCFS_ALLOC(ras, sizeof(*ras));
911 CERROR("ENOMEM allocating connection request from "
912 "%u.%u.%u.%u\n", HIPQUAD(peer_ip));
916 ras->ras_sock = sock;
918 spin_lock_irqsave(&kranal_data.kra_connd_lock, flags);
920 list_add_tail(&ras->ras_list, &kranal_data.kra_connd_acceptq);
921 wake_up(&kranal_data.kra_connd_waitq);
923 spin_unlock_irqrestore(&kranal_data.kra_connd_lock, flags);
928 kranal_create_peer (kra_peer_t **peerp, lnet_nid_t nid)
933 LASSERT (nid != LNET_NID_ANY);
935 LIBCFS_ALLOC(peer, sizeof(*peer));
939 memset(peer, 0, sizeof(*peer)); /* zero flags etc */
942 atomic_set(&peer->rap_refcount, 1); /* 1 ref for caller */
944 INIT_LIST_HEAD(&peer->rap_list);
945 INIT_LIST_HEAD(&peer->rap_connd_list);
946 INIT_LIST_HEAD(&peer->rap_conns);
947 INIT_LIST_HEAD(&peer->rap_tx_queue);
949 peer->rap_reconnect_interval = 0; /* OK to connect at any time */
951 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
953 if (kranal_data.kra_nonewpeers) {
954 /* shutdown has started already */
955 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
957 LIBCFS_FREE(peer, sizeof(*peer));
958 CERROR("Can't create peer: network shutdown\n");
962 atomic_inc(&kranal_data.kra_npeers);
964 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
971 kranal_destroy_peer (kra_peer_t *peer)
973 CDEBUG(D_NET, "peer %s %p deleted\n",
974 libcfs_nid2str(peer->rap_nid), peer);
976 LASSERT (atomic_read(&peer->rap_refcount) == 0);
977 LASSERT (peer->rap_persistence == 0);
978 LASSERT (!kranal_peer_active(peer));
979 LASSERT (!peer->rap_connecting);
980 LASSERT (list_empty(&peer->rap_conns));
981 LASSERT (list_empty(&peer->rap_tx_queue));
982 LASSERT (list_empty(&peer->rap_connd_list));
984 LIBCFS_FREE(peer, sizeof(*peer));
986 /* NB a peer's connections keep a reference on their peer until
987 * they are destroyed, so we can be assured that _all_ state to do
988 * with this peer has been cleaned up when its refcount drops to
990 atomic_dec(&kranal_data.kra_npeers);
994 kranal_find_peer_locked (lnet_nid_t nid)
996 struct list_head *peer_list = kranal_nid2peerlist(nid);
997 struct list_head *tmp;
1000 list_for_each (tmp, peer_list) {
1002 peer = list_entry(tmp, kra_peer_t, rap_list);
1004 LASSERT (peer->rap_persistence > 0 || /* persistent peer */
1005 !list_empty(&peer->rap_conns)); /* active conn */
1007 if (peer->rap_nid != nid)
1010 CDEBUG(D_NET, "got peer [%p] -> %s (%d)\n",
1011 peer, libcfs_nid2str(nid),
1012 atomic_read(&peer->rap_refcount));
1019 kranal_find_peer (lnet_nid_t nid)
1023 read_lock(&kranal_data.kra_global_lock);
1024 peer = kranal_find_peer_locked(nid);
1025 if (peer != NULL) /* +1 ref for caller? */
1026 kranal_peer_addref(peer);
1027 read_unlock(&kranal_data.kra_global_lock);
1033 kranal_unlink_peer_locked (kra_peer_t *peer)
1035 LASSERT (peer->rap_persistence == 0);
1036 LASSERT (list_empty(&peer->rap_conns));
1038 LASSERT (kranal_peer_active(peer));
1039 list_del_init(&peer->rap_list);
1041 /* lose peerlist's ref */
1042 kranal_peer_decref(peer);
1046 kranal_get_peer_info (int index, lnet_nid_t *nidp, __u32 *ipp, int *portp,
1050 struct list_head *ptmp;
1053 read_lock(&kranal_data.kra_global_lock);
1055 for (i = 0; i < kranal_data.kra_peer_hash_size; i++) {
1057 list_for_each(ptmp, &kranal_data.kra_peers[i]) {
1059 peer = list_entry(ptmp, kra_peer_t, rap_list);
1060 LASSERT (peer->rap_persistence > 0 ||
1061 !list_empty(&peer->rap_conns));
1066 *nidp = peer->rap_nid;
1067 *ipp = peer->rap_ip;
1068 *portp = peer->rap_port;
1069 *persistencep = peer->rap_persistence;
1071 read_unlock(&kranal_data.kra_global_lock);
1076 read_unlock(&kranal_data.kra_global_lock);
1081 kranal_add_persistent_peer (lnet_nid_t nid, __u32 ip, int port)
1083 unsigned long flags;
1088 if (nid == LNET_NID_ANY)
1091 rc = kranal_create_peer(&peer, nid);
1095 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
1097 peer2 = kranal_find_peer_locked(nid);
1098 if (peer2 != NULL) {
1099 kranal_peer_decref(peer);
1102 /* peer table takes existing ref on peer */
1103 list_add_tail(&peer->rap_list,
1104 kranal_nid2peerlist(nid));
1108 peer->rap_port = port;
1109 peer->rap_persistence++;
1111 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
1116 kranal_del_peer_locked (kra_peer_t *peer)
1118 struct list_head *ctmp;
1119 struct list_head *cnxt;
1122 peer->rap_persistence = 0;
1124 if (list_empty(&peer->rap_conns)) {
1125 kranal_unlink_peer_locked(peer);
1127 list_for_each_safe(ctmp, cnxt, &peer->rap_conns) {
1128 conn = list_entry(ctmp, kra_conn_t, rac_list);
1130 kranal_close_conn_locked(conn, 0);
1132 /* peer unlinks itself when last conn is closed */
1137 kranal_del_peer (lnet_nid_t nid)
1139 unsigned long flags;
1140 struct list_head *ptmp;
1141 struct list_head *pnxt;
1148 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
1150 if (nid != LNET_NID_ANY)
1151 lo = hi = kranal_nid2peerlist(nid) - kranal_data.kra_peers;
1154 hi = kranal_data.kra_peer_hash_size - 1;
1157 for (i = lo; i <= hi; i++) {
1158 list_for_each_safe (ptmp, pnxt, &kranal_data.kra_peers[i]) {
1159 peer = list_entry(ptmp, kra_peer_t, rap_list);
1160 LASSERT (peer->rap_persistence > 0 ||
1161 !list_empty(&peer->rap_conns));
1163 if (!(nid == LNET_NID_ANY || peer->rap_nid == nid))
1166 kranal_del_peer_locked(peer);
1167 rc = 0; /* matched something */
1171 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
1177 kranal_get_conn_by_idx (int index)
1180 struct list_head *ptmp;
1182 struct list_head *ctmp;
1185 read_lock (&kranal_data.kra_global_lock);
1187 for (i = 0; i < kranal_data.kra_peer_hash_size; i++) {
1188 list_for_each (ptmp, &kranal_data.kra_peers[i]) {
1190 peer = list_entry(ptmp, kra_peer_t, rap_list);
1191 LASSERT (peer->rap_persistence > 0 ||
1192 !list_empty(&peer->rap_conns));
1194 list_for_each (ctmp, &peer->rap_conns) {
1198 conn = list_entry(ctmp, kra_conn_t, rac_list);
1199 CDEBUG(D_NET, "++conn[%p] -> %s (%d)\n", conn,
1200 libcfs_nid2str(conn->rac_peer->rap_nid),
1201 atomic_read(&conn->rac_refcount));
1202 atomic_inc(&conn->rac_refcount);
1203 read_unlock(&kranal_data.kra_global_lock);
1209 read_unlock(&kranal_data.kra_global_lock);
1214 kranal_close_peer_conns_locked (kra_peer_t *peer, int why)
1217 struct list_head *ctmp;
1218 struct list_head *cnxt;
1221 list_for_each_safe (ctmp, cnxt, &peer->rap_conns) {
1222 conn = list_entry(ctmp, kra_conn_t, rac_list);
1225 kranal_close_conn_locked(conn, why);
1232 kranal_close_matching_conns (lnet_nid_t nid)
1234 unsigned long flags;
1236 struct list_head *ptmp;
1237 struct list_head *pnxt;
1243 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
1245 if (nid != LNET_NID_ANY)
1246 lo = hi = kranal_nid2peerlist(nid) - kranal_data.kra_peers;
1249 hi = kranal_data.kra_peer_hash_size - 1;
1252 for (i = lo; i <= hi; i++) {
1253 list_for_each_safe (ptmp, pnxt, &kranal_data.kra_peers[i]) {
1255 peer = list_entry(ptmp, kra_peer_t, rap_list);
1256 LASSERT (peer->rap_persistence > 0 ||
1257 !list_empty(&peer->rap_conns));
1259 if (!(nid == LNET_NID_ANY || nid == peer->rap_nid))
1262 count += kranal_close_peer_conns_locked(peer, 0);
1266 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
1268 /* wildcards always succeed */
1269 if (nid == LNET_NID_ANY)
1272 return (count == 0) ? -ENOENT : 0;
1276 kranal_ctl(lnet_ni_t *ni, unsigned int cmd, void *arg)
1278 struct libcfs_ioctl_data *data = arg;
1281 LASSERT (ni == kranal_data.kra_ni);
1284 case IOC_LIBCFS_GET_PEER: {
1288 int share_count = 0;
1290 rc = kranal_get_peer_info(data->ioc_count,
1291 &nid, &ip, &port, &share_count);
1292 data->ioc_nid = nid;
1293 data->ioc_count = share_count;
1294 data->ioc_u32[0] = ip;
1295 data->ioc_u32[1] = port;
1298 case IOC_LIBCFS_ADD_PEER: {
1299 rc = kranal_add_persistent_peer(data->ioc_nid,
1300 data->ioc_u32[0], /* IP */
1301 data->ioc_u32[1]); /* port */
1304 case IOC_LIBCFS_DEL_PEER: {
1305 rc = kranal_del_peer(data->ioc_nid);
1308 case IOC_LIBCFS_GET_CONN: {
1309 kra_conn_t *conn = kranal_get_conn_by_idx(data->ioc_count);
1315 data->ioc_nid = conn->rac_peer->rap_nid;
1316 data->ioc_u32[0] = conn->rac_device->rad_id;
1317 kranal_conn_decref(conn);
1321 case IOC_LIBCFS_CLOSE_CONNECTION: {
1322 rc = kranal_close_matching_conns(data->ioc_nid);
1325 case IOC_LIBCFS_REGISTER_MYNID: {
1326 /* Ignore if this is a noop */
1327 if (data->ioc_nid == ni->ni_nid) {
1330 CERROR("obsolete IOC_LIBCFS_REGISTER_MYNID: %s(%s)\n",
1331 libcfs_nid2str(data->ioc_nid),
1332 libcfs_nid2str(ni->ni_nid));
1343 kranal_free_txdescs(struct list_head *freelist)
1347 while (!list_empty(freelist)) {
1348 tx = list_entry(freelist->next, kra_tx_t, tx_list);
1350 list_del(&tx->tx_list);
1351 LIBCFS_FREE(tx->tx_phys, LNET_MAX_IOV * sizeof(*tx->tx_phys));
1352 LIBCFS_FREE(tx, sizeof(*tx));
1357 kranal_alloc_txdescs(struct list_head *freelist, int n)
1362 LASSERT (freelist == &kranal_data.kra_idle_txs);
1363 LASSERT (list_empty(freelist));
1365 for (i = 0; i < n; i++) {
1367 LIBCFS_ALLOC(tx, sizeof(*tx));
1369 CERROR("Can't allocate tx[%d]\n", i);
1370 kranal_free_txdescs(freelist);
1374 LIBCFS_ALLOC(tx->tx_phys,
1375 LNET_MAX_IOV * sizeof(*tx->tx_phys));
1376 if (tx->tx_phys == NULL) {
1377 CERROR("Can't allocate tx[%d]->tx_phys\n", i);
1379 LIBCFS_FREE(tx, sizeof(*tx));
1380 kranal_free_txdescs(freelist);
1384 tx->tx_buftype = RANAL_BUF_NONE;
1385 tx->tx_msg.ram_type = RANAL_MSG_NONE;
1387 list_add(&tx->tx_list, freelist);
1394 kranal_device_init(int id, kra_device_t *dev)
1396 int total_ntx = *kranal_tunables.kra_ntx;
1400 rrc = RapkGetDeviceByIndex(id, kranal_device_callback,
1402 if (rrc != RAP_SUCCESS) {
1403 CERROR("Can't get Rapidarray Device %d: %d\n", id, rrc);
1407 rrc = RapkReserveRdma(dev->rad_handle, total_ntx);
1408 if (rrc != RAP_SUCCESS) {
1409 CERROR("Can't reserve %d RDMA descriptors"
1410 " for device %d: %d\n", total_ntx, id, rrc);
1414 rrc = RapkCreateCQ(dev->rad_handle, total_ntx, RAP_CQTYPE_SEND,
1415 &dev->rad_rdma_cqh);
1416 if (rrc != RAP_SUCCESS) {
1417 CERROR("Can't create rdma cq size %d for device %d: %d\n",
1418 total_ntx, id, rrc);
1422 rrc = RapkCreateCQ(dev->rad_handle,
1423 *kranal_tunables.kra_fma_cq_size,
1424 RAP_CQTYPE_RECV, &dev->rad_fma_cqh);
1425 if (rrc != RAP_SUCCESS) {
1426 CERROR("Can't create fma cq size %d for device %d: %d\n",
1427 *kranal_tunables.kra_fma_cq_size, id, rrc);
1434 RapkDestroyCQ(dev->rad_handle, dev->rad_rdma_cqh);
1436 RapkReleaseDevice(dev->rad_handle);
1442 kranal_device_fini(kra_device_t *dev)
1444 LASSERT (list_empty(&dev->rad_ready_conns));
1445 LASSERT (list_empty(&dev->rad_new_conns));
1446 LASSERT (dev->rad_nphysmap == 0);
1447 LASSERT (dev->rad_nppphysmap == 0);
1448 LASSERT (dev->rad_nvirtmap == 0);
1449 LASSERT (dev->rad_nobvirtmap == 0);
1451 LASSERT(dev->rad_scheduler == NULL);
1452 RapkDestroyCQ(dev->rad_handle, dev->rad_fma_cqh);
1453 RapkDestroyCQ(dev->rad_handle, dev->rad_rdma_cqh);
1454 RapkReleaseDevice(dev->rad_handle);
1458 kranal_shutdown (lnet_ni_t *ni)
1461 unsigned long flags;
1463 CDEBUG(D_MALLOC, "before NAL cleanup: kmem %d\n",
1464 atomic_read(&libcfs_kmemory));
1466 LASSERT (ni == kranal_data.kra_ni);
1467 LASSERT (ni->ni_data == &kranal_data);
1469 switch (kranal_data.kra_init) {
1471 CERROR("Unexpected state %d\n", kranal_data.kra_init);
1474 case RANAL_INIT_ALL:
1475 /* Prevent new peers from being created */
1476 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
1477 kranal_data.kra_nonewpeers = 1;
1478 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
1480 /* Remove all existing peers from the peer table */
1481 kranal_del_peer(LNET_NID_ANY);
1483 /* Wait for pending conn reqs to be handled */
1485 spin_lock_irqsave(&kranal_data.kra_connd_lock, flags);
1486 while (!list_empty(&kranal_data.kra_connd_acceptq)) {
1487 spin_unlock_irqrestore(&kranal_data.kra_connd_lock,
1490 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* 2**n */
1491 "waiting for conn reqs to clean up\n");
1492 cfs_pause(cfs_time_seconds(1));
1494 spin_lock_irqsave(&kranal_data.kra_connd_lock, flags);
1496 spin_unlock_irqrestore(&kranal_data.kra_connd_lock, flags);
1498 /* Wait for all peers to be freed */
1500 while (atomic_read(&kranal_data.kra_npeers) != 0) {
1502 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* 2**n */
1503 "waiting for %d peers to close down\n",
1504 atomic_read(&kranal_data.kra_npeers));
1505 cfs_pause(cfs_time_seconds(1));
1509 case RANAL_INIT_DATA:
1513 /* Peer state all cleaned up BEFORE setting shutdown, so threads don't
1514 * have to worry about shutdown races. NB connections may be created
1515 * while there are still active connds, but these will be temporary
1516 * since peer creation always fails after the listener has started to
1518 LASSERT (atomic_read(&kranal_data.kra_npeers) == 0);
1520 /* Flag threads to terminate */
1521 kranal_data.kra_shutdown = 1;
1523 for (i = 0; i < kranal_data.kra_ndevs; i++) {
1524 kra_device_t *dev = &kranal_data.kra_devices[i];
1526 spin_lock_irqsave(&dev->rad_lock, flags);
1527 wake_up(&dev->rad_waitq);
1528 spin_unlock_irqrestore(&dev->rad_lock, flags);
1531 spin_lock_irqsave(&kranal_data.kra_reaper_lock, flags);
1532 wake_up_all(&kranal_data.kra_reaper_waitq);
1533 spin_unlock_irqrestore(&kranal_data.kra_reaper_lock, flags);
1535 LASSERT (list_empty(&kranal_data.kra_connd_peers));
1536 spin_lock_irqsave(&kranal_data.kra_connd_lock, flags);
1537 wake_up_all(&kranal_data.kra_connd_waitq);
1538 spin_unlock_irqrestore(&kranal_data.kra_connd_lock, flags);
1540 /* Wait for threads to exit */
1542 while (atomic_read(&kranal_data.kra_nthreads) != 0) {
1544 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* power of 2? */
1545 "Waiting for %d threads to terminate\n",
1546 atomic_read(&kranal_data.kra_nthreads));
1547 cfs_pause(cfs_time_seconds(1));
1550 LASSERT (atomic_read(&kranal_data.kra_npeers) == 0);
1551 if (kranal_data.kra_peers != NULL) {
1552 for (i = 0; i < kranal_data.kra_peer_hash_size; i++)
1553 LASSERT (list_empty(&kranal_data.kra_peers[i]));
1555 LIBCFS_FREE(kranal_data.kra_peers,
1556 sizeof (struct list_head) *
1557 kranal_data.kra_peer_hash_size);
1560 LASSERT (atomic_read(&kranal_data.kra_nconns) == 0);
1561 if (kranal_data.kra_conns != NULL) {
1562 for (i = 0; i < kranal_data.kra_conn_hash_size; i++)
1563 LASSERT (list_empty(&kranal_data.kra_conns[i]));
1565 LIBCFS_FREE(kranal_data.kra_conns,
1566 sizeof (struct list_head) *
1567 kranal_data.kra_conn_hash_size);
1570 for (i = 0; i < kranal_data.kra_ndevs; i++)
1571 kranal_device_fini(&kranal_data.kra_devices[i]);
1573 kranal_free_txdescs(&kranal_data.kra_idle_txs);
1575 CDEBUG(D_MALLOC, "after NAL cleanup: kmem %d\n",
1576 atomic_read(&libcfs_kmemory));
1578 kranal_data.kra_init = RANAL_INIT_NOTHING;
1579 PORTAL_MODULE_UNUSE;
1583 kranal_startup (lnet_ni_t *ni)
1586 int pkmem = atomic_read(&libcfs_kmemory);
1591 LASSERT (ni->ni_lnd == &the_kralnd);
1593 /* Only 1 instance supported */
1594 if (kranal_data.kra_init != RANAL_INIT_NOTHING) {
1595 CERROR ("Only 1 instance supported\n");
1599 if (lnet_set_ip_niaddr(ni) != 0) {
1600 CERROR ("Can't determine my NID\n");
1604 if (*kranal_tunables.kra_credits > *kranal_tunables.kra_ntx) {
1605 CERROR ("Can't set credits(%d) > ntx(%d)\n",
1606 *kranal_tunables.kra_credits,
1607 *kranal_tunables.kra_ntx);
1611 memset(&kranal_data, 0, sizeof(kranal_data)); /* zero pointers, flags etc */
1613 ni->ni_maxtxcredits = *kranal_tunables.kra_credits;
1614 ni->ni_peertxcredits = *kranal_tunables.kra_peercredits;
1616 ni->ni_data = &kranal_data;
1617 kranal_data.kra_ni = ni;
1619 /* CAVEAT EMPTOR: Every 'Fma' message includes the sender's NID and
1620 * a unique (for all time) connstamp so we can uniquely identify
1621 * the sender. The connstamp is an incrementing counter
1622 * initialised with seconds + microseconds at startup time. So we
1623 * rely on NOT creating connections more frequently on average than
1624 * 1MHz to ensure we don't use old connstamps when we reboot. */
1625 do_gettimeofday(&tv);
1626 kranal_data.kra_connstamp =
1627 kranal_data.kra_peerstamp = (((__u64)tv.tv_sec) * 1000000) + tv.tv_usec;
1629 rwlock_init(&kranal_data.kra_global_lock);
1631 for (i = 0; i < RANAL_MAXDEVS; i++ ) {
1632 kra_device_t *dev = &kranal_data.kra_devices[i];
1635 INIT_LIST_HEAD(&dev->rad_ready_conns);
1636 INIT_LIST_HEAD(&dev->rad_new_conns);
1637 init_waitqueue_head(&dev->rad_waitq);
1638 spin_lock_init(&dev->rad_lock);
1641 kranal_data.kra_new_min_timeout = MAX_SCHEDULE_TIMEOUT;
1642 init_waitqueue_head(&kranal_data.kra_reaper_waitq);
1643 spin_lock_init(&kranal_data.kra_reaper_lock);
1645 INIT_LIST_HEAD(&kranal_data.kra_connd_acceptq);
1646 INIT_LIST_HEAD(&kranal_data.kra_connd_peers);
1647 init_waitqueue_head(&kranal_data.kra_connd_waitq);
1648 spin_lock_init(&kranal_data.kra_connd_lock);
1650 INIT_LIST_HEAD(&kranal_data.kra_idle_txs);
1651 spin_lock_init(&kranal_data.kra_tx_lock);
1653 /* OK to call kranal_api_shutdown() to cleanup now */
1654 kranal_data.kra_init = RANAL_INIT_DATA;
1657 kranal_data.kra_peer_hash_size = RANAL_PEER_HASH_SIZE;
1658 LIBCFS_ALLOC(kranal_data.kra_peers,
1659 sizeof(struct list_head) * kranal_data.kra_peer_hash_size);
1660 if (kranal_data.kra_peers == NULL)
1663 for (i = 0; i < kranal_data.kra_peer_hash_size; i++)
1664 INIT_LIST_HEAD(&kranal_data.kra_peers[i]);
1666 kranal_data.kra_conn_hash_size = RANAL_PEER_HASH_SIZE;
1667 LIBCFS_ALLOC(kranal_data.kra_conns,
1668 sizeof(struct list_head) * kranal_data.kra_conn_hash_size);
1669 if (kranal_data.kra_conns == NULL)
1672 for (i = 0; i < kranal_data.kra_conn_hash_size; i++)
1673 INIT_LIST_HEAD(&kranal_data.kra_conns[i]);
1675 rc = kranal_alloc_txdescs(&kranal_data.kra_idle_txs,
1676 *kranal_tunables.kra_ntx);
1680 rc = kranal_thread_start(kranal_reaper, NULL);
1682 CERROR("Can't spawn ranal reaper: %d\n", rc);
1686 for (i = 0; i < *kranal_tunables.kra_n_connd; i++) {
1687 rc = kranal_thread_start(kranal_connd, (void *)(unsigned long)i);
1689 CERROR("Can't spawn ranal connd[%d]: %d\n",
1695 LASSERT (kranal_data.kra_ndevs == 0);
1697 /* Use all available RapidArray devices */
1698 for (i = 0; i < RANAL_MAXDEVS; i++) {
1699 dev = &kranal_data.kra_devices[kranal_data.kra_ndevs];
1701 rc = kranal_device_init(kranal_devids[i], dev);
1703 kranal_data.kra_ndevs++;
1706 if (kranal_data.kra_ndevs == 0) {
1707 CERROR("Can't initialise any RapidArray devices\n");
1711 for (i = 0; i < kranal_data.kra_ndevs; i++) {
1712 dev = &kranal_data.kra_devices[i];
1713 rc = kranal_thread_start(kranal_scheduler, dev);
1715 CERROR("Can't spawn ranal scheduler[%d]: %d\n",
1721 /* flag everything initialised */
1722 kranal_data.kra_init = RANAL_INIT_ALL;
1723 /*****************************************************/
1725 CDEBUG(D_MALLOC, "initial kmem %d\n", pkmem);
1729 kranal_shutdown(ni);
1734 kranal_module_fini (void)
1736 lnet_unregister_lnd(&the_kralnd);
1737 kranal_tunables_fini();
1741 kranal_module_init (void)
1745 rc = kranal_tunables_init();
1749 lnet_register_lnd(&the_kralnd);
1754 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
1755 MODULE_DESCRIPTION("Kernel RapidArray LND v0.01");
1756 MODULE_LICENSE("GPL");
1758 module_init(kranal_module_init);
1759 module_exit(kranal_module_fini);