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.
25 static int kranal_devids[] = {RAPK_MAIN_DEVICE_ID,
26 RAPK_EXPANSION_DEVICE_ID};
29 ptl_handle_ni_t kranal_ni;
30 kra_data_t kranal_data;
31 kra_tunables_t kranal_tunables;
33 #define RANAL_SYSCTL_TIMEOUT 1
34 #define RANAL_SYSCTL_LISTENER_TIMEOUT 2
35 #define RANAL_SYSCTL_BACKLOG 3
36 #define RANAL_SYSCTL_PORT 4
37 #define RANAL_SYSCTL_MAX_IMMEDIATE 5
39 #define RANAL_SYSCTL 202
41 static ctl_table kranal_ctl_table[] = {
42 {RANAL_SYSCTL_TIMEOUT, "timeout",
43 &kranal_tunables.kra_timeout, sizeof(int),
44 0644, NULL, &proc_dointvec},
45 {RANAL_SYSCTL_LISTENER_TIMEOUT, "listener_timeout",
46 &kranal_tunables.kra_listener_timeout, sizeof(int),
47 0644, NULL, &proc_dointvec},
48 {RANAL_SYSCTL_BACKLOG, "backlog",
49 &kranal_tunables.kra_backlog, sizeof(int),
50 0644, NULL, kranal_listener_procint},
51 {RANAL_SYSCTL_PORT, "port",
52 &kranal_tunables.kra_port, sizeof(int),
53 0644, NULL, kranal_listener_procint},
54 {RANAL_SYSCTL_MAX_IMMEDIATE, "max_immediate",
55 &kranal_tunables.kra_max_immediate, sizeof(int),
56 0644, NULL, &proc_dointvec},
60 static ctl_table kranal_top_ctl_table[] = {
61 {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);
102 kranal_sock_read (struct socket *sock, void *buffer, int nob, int timeout)
105 mm_segment_t oldmm = get_fs();
106 long ticks = timeout * HZ;
118 struct msghdr msg = {
128 /* Set receive timeout to remaining time */
129 tv = (struct timeval) {
130 .tv_sec = ticks / HZ,
131 .tv_usec = ((ticks % HZ) * 1000000) / HZ
134 rc = sock_setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO,
135 (char *)&tv, sizeof(tv));
138 CERROR("Can't set socket recv timeout %d: %d\n",
145 rc = sock_recvmsg(sock, &msg, iov.iov_len, 0);
146 ticks -= jiffies - then;
153 return -ECONNABORTED;
155 buffer = ((char *)buffer) + rc;
167 kranal_create_sock(struct socket **sockp)
172 mm_segment_t oldmm = get_fs();
174 rc = sock_create(PF_INET, SOCK_STREAM, 0, &sock);
176 CERROR("Can't create socket: %d\n", rc);
180 /* Ensure sending connection info doesn't block */
181 option = 2 * sizeof(kra_connreq_t);
183 rc = sock_setsockopt(sock, SOL_SOCKET, SO_SNDBUF,
184 (char *)&option, sizeof(option));
187 CERROR("Can't set send buffer %d: %d\n", option, rc);
193 rc = sock_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
194 (char *)&option, sizeof(option));
197 CERROR("Can't set SO_REUSEADDR: %d\n", rc);
210 kranal_pause(int ticks)
212 set_current_state(TASK_UNINTERRUPTIBLE);
213 schedule_timeout(ticks);
217 kranal_pack_connreq(kra_connreq_t *connreq, kra_conn_t *conn, ptl_nid_t dstnid)
221 memset(connreq, 0, sizeof(*connreq));
223 connreq->racr_magic = RANAL_MSG_MAGIC;
224 connreq->racr_version = RANAL_MSG_VERSION;
225 connreq->racr_devid = conn->rac_device->rad_id;
226 connreq->racr_srcnid = kranal_lib.libnal_ni.ni_pid.nid;
227 connreq->racr_dstnid = dstnid;
228 connreq->racr_peerstamp = kranal_data.kra_peerstamp;
229 connreq->racr_connstamp = conn->rac_my_connstamp;
230 connreq->racr_timeout = conn->rac_timeout;
232 rrc = RapkGetRiParams(conn->rac_rihandle, &connreq->racr_riparams);
233 LASSERT(rrc == RAP_SUCCESS);
237 kranal_recv_connreq(struct socket *sock, kra_connreq_t *connreq, int timeout)
241 rc = kranal_sock_read(sock, connreq, sizeof(*connreq), timeout);
243 CERROR("Read failed: %d\n", rc);
247 if (connreq->racr_magic != RANAL_MSG_MAGIC) {
248 if (__swab32(connreq->racr_magic) != RANAL_MSG_MAGIC) {
249 CERROR("Unexpected magic %08x\n", connreq->racr_magic);
253 __swab32s(&connreq->racr_magic);
254 __swab16s(&connreq->racr_version);
255 __swab16s(&connreq->racr_devid);
256 __swab64s(&connreq->racr_srcnid);
257 __swab64s(&connreq->racr_dstnid);
258 __swab64s(&connreq->racr_peerstamp);
259 __swab64s(&connreq->racr_connstamp);
260 __swab32s(&connreq->racr_timeout);
262 __swab32s(&connreq->racr_riparams.HostId);
263 __swab32s(&connreq->racr_riparams.FmaDomainHndl);
264 __swab32s(&connreq->racr_riparams.PTag);
265 __swab32s(&connreq->racr_riparams.CompletionCookie);
268 if (connreq->racr_version != RANAL_MSG_VERSION) {
269 CERROR("Unexpected version %d\n", connreq->racr_version);
273 if (connreq->racr_srcnid == PTL_NID_ANY ||
274 connreq->racr_dstnid == PTL_NID_ANY) {
275 CERROR("Received PTL_NID_ANY\n");
279 if (connreq->racr_timeout < RANAL_MIN_TIMEOUT) {
280 CERROR("Received timeout %d < MIN %d\n",
281 connreq->racr_timeout, RANAL_MIN_TIMEOUT);
289 kranal_close_stale_conns_locked (kra_peer_t *peer, kra_conn_t *newconn)
292 struct list_head *ctmp;
293 struct list_head *cnxt;
297 loopback = peer->rap_nid == kranal_lib.libnal_ni.ni_pid.nid;
299 list_for_each_safe (ctmp, cnxt, &peer->rap_conns) {
300 conn = list_entry(ctmp, kra_conn_t, rac_list);
305 if (conn->rac_peerstamp != newconn->rac_peerstamp) {
306 CDEBUG(D_NET, "Closing stale conn nid:"LPX64
307 " peerstamp:"LPX64"("LPX64")\n", peer->rap_nid,
308 conn->rac_peerstamp, newconn->rac_peerstamp);
309 LASSERT (conn->rac_peerstamp < newconn->rac_peerstamp);
311 kranal_close_conn_locked(conn, -ESTALE);
315 if (conn->rac_device != newconn->rac_device)
319 newconn->rac_my_connstamp == conn->rac_peer_connstamp &&
320 newconn->rac_peer_connstamp == conn->rac_my_connstamp)
323 LASSERT (conn->rac_peer_connstamp < newconn->rac_peer_connstamp);
325 CDEBUG(D_NET, "Closing stale conn nid:"LPX64
326 " connstamp:"LPX64"("LPX64")\n", peer->rap_nid,
327 conn->rac_peer_connstamp, newconn->rac_peer_connstamp);
330 kranal_close_conn_locked(conn, -ESTALE);
337 kranal_conn_isdup_locked(kra_peer_t *peer, kra_conn_t *newconn)
340 struct list_head *tmp;
343 loopback = peer->rap_nid == kranal_lib.libnal_ni.ni_pid.nid;
345 list_for_each(tmp, &peer->rap_conns) {
346 conn = list_entry(tmp, kra_conn_t, rac_list);
348 /* 'newconn' is from an earlier version of 'peer'!!! */
349 if (newconn->rac_peerstamp < conn->rac_peerstamp)
352 /* 'conn' is from an earlier version of 'peer': it will be
353 * removed when we cull stale conns later on... */
354 if (newconn->rac_peerstamp > conn->rac_peerstamp)
357 /* Different devices are OK */
358 if (conn->rac_device != newconn->rac_device)
361 /* It's me connecting to myself */
363 newconn->rac_my_connstamp == conn->rac_peer_connstamp &&
364 newconn->rac_peer_connstamp == conn->rac_my_connstamp)
367 /* 'newconn' is an earlier connection from 'peer'!!! */
368 if (newconn->rac_peer_connstamp < conn->rac_peer_connstamp)
371 /* 'conn' is an earlier connection from 'peer': it will be
372 * removed when we cull stale conns later on... */
373 if (newconn->rac_peer_connstamp > conn->rac_peer_connstamp)
376 /* 'newconn' has the SAME connection stamp; 'peer' isn't
377 * playing the game... */
385 kranal_set_conn_uniqueness (kra_conn_t *conn)
389 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
391 conn->rac_my_connstamp = kranal_data.kra_connstamp++;
393 do { /* allocate a unique cqid */
394 conn->rac_cqid = kranal_data.kra_next_cqid++;
395 } while (kranal_cqid2conn_locked(conn->rac_cqid) != NULL);
397 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
401 kranal_create_conn(kra_conn_t **connp, kra_device_t *dev)
406 LASSERT (!in_interrupt());
407 PORTAL_ALLOC(conn, sizeof(*conn));
412 memset(conn, 0, sizeof(*conn));
413 atomic_set(&conn->rac_refcount, 1);
414 INIT_LIST_HEAD(&conn->rac_list);
415 INIT_LIST_HEAD(&conn->rac_hashlist);
416 INIT_LIST_HEAD(&conn->rac_schedlist);
417 INIT_LIST_HEAD(&conn->rac_fmaq);
418 INIT_LIST_HEAD(&conn->rac_rdmaq);
419 INIT_LIST_HEAD(&conn->rac_replyq);
420 spin_lock_init(&conn->rac_lock);
422 kranal_set_conn_uniqueness(conn);
424 conn->rac_device = dev;
425 conn->rac_timeout = MAX(kranal_tunables.kra_timeout, RANAL_MIN_TIMEOUT);
426 kranal_update_reaper_timeout(conn->rac_timeout);
428 rrc = RapkCreateRi(dev->rad_handle, conn->rac_cqid,
429 &conn->rac_rihandle);
430 if (rrc != RAP_SUCCESS) {
431 CERROR("RapkCreateRi failed: %d\n", rrc);
432 PORTAL_FREE(conn, sizeof(*conn));
436 atomic_inc(&kranal_data.kra_nconns);
442 kranal_destroy_conn(kra_conn_t *conn)
446 LASSERT (!in_interrupt());
447 LASSERT (!conn->rac_scheduled);
448 LASSERT (list_empty(&conn->rac_list));
449 LASSERT (list_empty(&conn->rac_hashlist));
450 LASSERT (list_empty(&conn->rac_schedlist));
451 LASSERT (atomic_read(&conn->rac_refcount) == 0);
452 LASSERT (list_empty(&conn->rac_fmaq));
453 LASSERT (list_empty(&conn->rac_rdmaq));
454 LASSERT (list_empty(&conn->rac_replyq));
456 rrc = RapkDestroyRi(conn->rac_device->rad_handle,
458 LASSERT (rrc == RAP_SUCCESS);
460 if (conn->rac_peer != NULL)
461 kranal_peer_decref(conn->rac_peer);
463 PORTAL_FREE(conn, sizeof(*conn));
464 atomic_dec(&kranal_data.kra_nconns);
468 kranal_terminate_conn_locked (kra_conn_t *conn)
470 LASSERT (!in_interrupt());
471 LASSERT (conn->rac_state == RANAL_CONN_CLOSING);
472 LASSERT (!list_empty(&conn->rac_hashlist));
473 LASSERT (list_empty(&conn->rac_list));
475 /* Remove from conn hash table: no new callbacks */
476 list_del_init(&conn->rac_hashlist);
477 kranal_conn_decref(conn);
479 conn->rac_state = RANAL_CONN_CLOSED;
481 /* schedule to clear out all uncompleted comms in context of dev's
483 kranal_schedule_conn(conn);
487 kranal_close_conn_locked (kra_conn_t *conn, int error)
489 kra_peer_t *peer = conn->rac_peer;
491 CDEBUG(error == 0 ? D_NET : D_ERROR,
492 "closing conn to "LPX64": error %d\n", peer->rap_nid, error);
494 LASSERT (!in_interrupt());
495 LASSERT (conn->rac_state == RANAL_CONN_ESTABLISHED);
496 LASSERT (!list_empty(&conn->rac_hashlist));
497 LASSERT (!list_empty(&conn->rac_list));
499 list_del_init(&conn->rac_list);
501 if (list_empty(&peer->rap_conns) &&
502 peer->rap_persistence == 0) {
503 /* Non-persistent peer with no more conns... */
504 kranal_unlink_peer_locked(peer);
507 /* Reset RX timeout to ensure we wait for an incoming CLOSE for the
508 * full timeout. If we get a CLOSE we know the peer has stopped all
509 * RDMA. Otherwise if we wait for the full timeout we can also be sure
510 * all RDMA has stopped. */
511 conn->rac_last_rx = jiffies;
514 conn->rac_state = RANAL_CONN_CLOSING;
515 kranal_schedule_conn(conn); /* schedule sending CLOSE */
517 kranal_conn_decref(conn); /* lose peer's ref */
521 kranal_close_conn (kra_conn_t *conn, int error)
526 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
528 if (conn->rac_state == RANAL_CONN_ESTABLISHED)
529 kranal_close_conn_locked(conn, error);
531 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
535 kranal_set_conn_params(kra_conn_t *conn, kra_connreq_t *connreq,
536 __u32 peer_ip, int peer_port)
538 kra_device_t *dev = conn->rac_device;
542 /* CAVEAT EMPTOR: we're really overloading rac_last_tx + rac_keepalive
543 * to do RapkCompleteSync() timekeeping (see kibnal_scheduler). */
544 conn->rac_last_tx = jiffies;
545 conn->rac_keepalive = 0;
547 /* Schedule conn on rad_new_conns */
548 kranal_conn_addref(conn);
549 spin_lock_irqsave(&dev->rad_lock, flags);
550 list_add_tail(&conn->rac_schedlist, &dev->rad_new_conns);
551 wake_up(&dev->rad_waitq);
552 spin_unlock_irqrestore(&dev->rad_lock, flags);
554 rrc = RapkSetRiParams(conn->rac_rihandle, &connreq->racr_riparams);
555 if (rrc != RAP_SUCCESS) {
556 CERROR("Error setting riparams from %u.%u.%u.%u/%d: %d\n",
557 HIPQUAD(peer_ip), peer_port, rrc);
558 return -ECONNABORTED;
561 /* Scheduler doesn't touch conn apart from to deschedule and decref it
562 * after RapkCompleteSync() return success, so conn is all mine */
564 conn->rac_peerstamp = connreq->racr_peerstamp;
565 conn->rac_peer_connstamp = connreq->racr_connstamp;
566 conn->rac_keepalive = RANAL_TIMEOUT2KEEPALIVE(connreq->racr_timeout);
567 kranal_update_reaper_timeout(conn->rac_keepalive);
572 kranal_passive_conn_handshake (struct socket *sock, ptl_nid_t *src_nidp,
573 ptl_nid_t *dst_nidp, kra_conn_t **connp)
575 struct sockaddr_in addr;
577 unsigned int peer_port;
578 kra_connreq_t rx_connreq;
579 kra_connreq_t tx_connreq;
587 rc = sock->ops->getname(sock, (struct sockaddr *)&addr, &len, 2);
589 CERROR("Can't get peer's IP: %d\n", rc);
593 peer_ip = ntohl(addr.sin_addr.s_addr);
594 peer_port = ntohs(addr.sin_port);
596 if (peer_port >= 1024) {
597 CERROR("Refusing unprivileged connection from %u.%u.%u.%u/%d\n",
598 HIPQUAD(peer_ip), peer_port);
599 return -ECONNREFUSED;
602 rc = kranal_recv_connreq(sock, &rx_connreq,
603 kranal_tunables.kra_listener_timeout);
605 CERROR("Can't rx connreq from %u.%u.%u.%u/%d: %d\n",
606 HIPQUAD(peer_ip), peer_port, rc);
611 if (i == kranal_data.kra_ndevs) {
612 CERROR("Can't match dev %d from %u.%u.%u.%u/%d\n",
613 rx_connreq.racr_devid, HIPQUAD(peer_ip), peer_port);
616 dev = &kranal_data.kra_devices[i];
617 if (dev->rad_id == rx_connreq.racr_devid)
621 rc = kranal_create_conn(&conn, dev);
625 kranal_pack_connreq(&tx_connreq, conn, rx_connreq.racr_srcnid);
627 rc = kranal_sock_write(sock, &tx_connreq, sizeof(tx_connreq));
629 CERROR("Can't tx connreq to %u.%u.%u.%u/%d: %d\n",
630 HIPQUAD(peer_ip), peer_port, rc);
631 kranal_conn_decref(conn);
635 rc = kranal_set_conn_params(conn, &rx_connreq, peer_ip, peer_port);
637 kranal_conn_decref(conn);
642 *src_nidp = rx_connreq.racr_srcnid;
643 *dst_nidp = rx_connreq.racr_dstnid;
648 ranal_connect_sock(kra_peer_t *peer, struct socket **sockp)
650 struct sockaddr_in locaddr;
651 struct sockaddr_in srvaddr;
656 for (port = 1023; port >= 512; port--) {
658 memset(&locaddr, 0, sizeof(locaddr));
659 locaddr.sin_family = AF_INET;
660 locaddr.sin_port = htons(port);
661 locaddr.sin_addr.s_addr = htonl(INADDR_ANY);
663 memset (&srvaddr, 0, sizeof (srvaddr));
664 srvaddr.sin_family = AF_INET;
665 srvaddr.sin_port = htons (peer->rap_port);
666 srvaddr.sin_addr.s_addr = htonl (peer->rap_ip);
668 rc = kranal_create_sock(&sock);
672 rc = sock->ops->bind(sock,
673 (struct sockaddr *)&locaddr, sizeof(locaddr));
677 if (rc == -EADDRINUSE) {
678 CDEBUG(D_NET, "Port %d already in use\n", port);
682 CERROR("Can't bind to reserved port %d: %d\n", port, rc);
686 rc = sock->ops->connect(sock,
687 (struct sockaddr *)&srvaddr, sizeof(srvaddr),
696 if (rc != -EADDRNOTAVAIL) {
697 CERROR("Can't connect port %d to %u.%u.%u.%u/%d: %d\n",
698 port, HIPQUAD(peer->rap_ip), peer->rap_port, rc);
702 CDEBUG(D_NET, "Port %d not available for %u.%u.%u.%u/%d\n",
703 port, HIPQUAD(peer->rap_ip), peer->rap_port);
707 return -EHOSTUNREACH;
712 kranal_active_conn_handshake(kra_peer_t *peer,
713 ptl_nid_t *dst_nidp, kra_conn_t **connp)
715 kra_connreq_t connreq;
722 /* spread connections over all devices using both peer NIDs to ensure
723 * all nids use all devices */
724 idx = peer->rap_nid + kranal_lib.libnal_ni.ni_pid.nid;
725 dev = &kranal_data.kra_devices[idx % kranal_data.kra_ndevs];
727 rc = kranal_create_conn(&conn, dev);
731 kranal_pack_connreq(&connreq, conn, peer->rap_nid);
733 rc = ranal_connect_sock(peer, &sock);
737 /* CAVEAT EMPTOR: the passive side receives with a SHORT rx timeout
738 * immediately after accepting a connection, so we connect and then
739 * send immediately. */
741 rc = kranal_sock_write(sock, &connreq, sizeof(connreq));
743 CERROR("Can't tx connreq to %u.%u.%u.%u/%d: %d\n",
744 HIPQUAD(peer->rap_ip), peer->rap_port, rc);
748 rc = kranal_recv_connreq(sock, &connreq, kranal_tunables.kra_timeout);
750 CERROR("Can't rx connreq from %u.%u.%u.%u/%d: %d\n",
751 HIPQUAD(peer->rap_ip), peer->rap_port, rc);
758 if (connreq.racr_srcnid != peer->rap_nid) {
759 CERROR("Unexpected srcnid from %u.%u.%u.%u/%d: "
760 "received "LPX64" expected "LPX64"\n",
761 HIPQUAD(peer->rap_ip), peer->rap_port,
762 connreq.racr_srcnid, peer->rap_nid);
766 if (connreq.racr_devid != dev->rad_id) {
767 CERROR("Unexpected device id from %u.%u.%u.%u/%d: "
768 "received %d expected %d\n",
769 HIPQUAD(peer->rap_ip), peer->rap_port,
770 connreq.racr_devid, dev->rad_id);
774 rc = kranal_set_conn_params(conn, &connreq,
775 peer->rap_ip, peer->rap_port);
780 *dst_nidp = connreq.racr_dstnid;
786 kranal_conn_decref(conn);
791 kranal_conn_handshake (struct socket *sock, kra_peer_t *peer)
804 /* active: connd wants to connect to 'peer' */
805 LASSERT (peer != NULL);
806 LASSERT (peer->rap_connecting);
808 rc = kranal_active_conn_handshake(peer, &dst_nid, &conn);
812 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
814 if (!kranal_peer_active(peer)) {
815 /* raced with peer getting unlinked */
816 write_unlock_irqrestore(&kranal_data.kra_global_lock,
818 kranal_conn_decref(conn);
822 peer_nid = peer->rap_nid;
824 /* passive: listener accepted 'sock' */
825 LASSERT (peer == NULL);
827 rc = kranal_passive_conn_handshake(sock, &peer_nid,
832 /* assume this is a new peer */
833 peer = kranal_create_peer(peer_nid);
835 CERROR("Can't allocate peer for "LPX64"\n", peer_nid);
836 kranal_conn_decref(conn);
840 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
842 peer2 = kranal_find_peer_locked(peer_nid);
846 /* peer_nid already in the peer table */
847 kranal_peer_decref(peer);
852 LASSERT ((!new_peer) != (!kranal_peer_active(peer)));
854 /* Refuse connection if peer thinks we are a different NID. We check
855 * this while holding the global lock, to synch with connection
856 * destruction on NID change. */
857 if (dst_nid != kranal_lib.libnal_ni.ni_pid.nid) {
858 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
860 CERROR("Stale/bad connection with "LPX64
861 ": dst_nid "LPX64", expected "LPX64"\n",
862 peer_nid, dst_nid, kranal_lib.libnal_ni.ni_pid.nid);
867 /* Refuse to duplicate an existing connection (both sides might try to
868 * connect at once). NB we return success! We _are_ connected so we
869 * _don't_ have any blocked txs to complete with failure. */
870 rc = kranal_conn_isdup_locked(peer, conn);
872 LASSERT (!list_empty(&peer->rap_conns));
873 LASSERT (list_empty(&peer->rap_tx_queue));
874 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
875 CWARN("Not creating duplicate connection to "LPX64": %d\n",
882 /* peer table takes my ref on the new peer */
883 list_add_tail(&peer->rap_list,
884 kranal_nid2peerlist(peer_nid));
887 /* initialise timestamps before reaper looks at them */
888 conn->rac_last_tx = conn->rac_last_rx = jiffies;
890 kranal_peer_addref(peer); /* +1 ref for conn */
891 conn->rac_peer = peer;
892 list_add_tail(&conn->rac_list, &peer->rap_conns);
894 kranal_conn_addref(conn); /* +1 ref for conn table */
895 list_add_tail(&conn->rac_hashlist,
896 kranal_cqid2connlist(conn->rac_cqid));
898 /* Schedule all packets blocking for a connection */
899 while (!list_empty(&peer->rap_tx_queue)) {
900 tx = list_entry(peer->rap_tx_queue.next,
903 list_del(&tx->tx_list);
904 kranal_post_fma(conn, tx);
907 nstale = kranal_close_stale_conns_locked(peer, conn);
909 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
911 /* CAVEAT EMPTOR: passive peer can disappear NOW */
914 CWARN("Closed %d stale conns to "LPX64"\n", nstale, peer_nid);
916 CDEBUG(D_WARNING, "New connection to "LPX64" on devid[%d] = %d\n",
917 peer_nid, conn->rac_device->rad_idx, conn->rac_device->rad_id);
919 /* Ensure conn gets checked. Transmits may have been queued and an
920 * FMA event may have happened before it got in the cq hash table */
921 kranal_schedule_conn(conn);
926 kranal_peer_decref(peer);
927 kranal_conn_decref(conn);
932 kranal_connect (kra_peer_t *peer)
936 struct list_head zombies;
939 LASSERT (peer->rap_connecting);
941 CDEBUG(D_NET, "About to handshake "LPX64"\n", peer->rap_nid);
943 rc = kranal_conn_handshake(NULL, peer);
945 CDEBUG(D_NET, "Done handshake "LPX64":%d \n", peer->rap_nid, rc);
947 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
949 LASSERT (peer->rap_connecting);
950 peer->rap_connecting = 0;
953 /* kranal_conn_handshake() queues blocked txs immediately on
954 * success to avoid messages jumping the queue */
955 LASSERT (list_empty(&peer->rap_tx_queue));
957 /* reset reconnection timeouts */
958 peer->rap_reconnect_interval = RANAL_MIN_RECONNECT_INTERVAL;
959 peer->rap_reconnect_time = CURRENT_SECONDS;
961 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
965 LASSERT (peer->rap_reconnect_interval != 0);
966 peer->rap_reconnect_time = CURRENT_SECONDS + peer->rap_reconnect_interval;
967 peer->rap_reconnect_interval = MAX(RANAL_MAX_RECONNECT_INTERVAL,
968 1 * peer->rap_reconnect_interval);
970 /* Grab all blocked packets while we have the global lock */
971 list_add(&zombies, &peer->rap_tx_queue);
972 list_del_init(&peer->rap_tx_queue);
974 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
976 if (list_empty(&zombies))
979 CWARN("Dropping packets for "LPX64": connection failed\n",
983 tx = list_entry(zombies.next, kra_tx_t, tx_list);
985 list_del(&tx->tx_list);
986 kranal_tx_done(tx, -EHOSTUNREACH);
988 } while (!list_empty(&zombies));
992 kranal_free_acceptsock (kra_acceptsock_t *ras)
994 sock_release(ras->ras_sock);
995 PORTAL_FREE(ras, sizeof(*ras));
999 kranal_listener (void *arg)
1001 struct sockaddr_in addr;
1003 struct socket *sock;
1004 kra_acceptsock_t *ras;
1008 unsigned long flags;
1010 /* Parent thread holds kra_nid_mutex, and is, or is about to
1011 * block on kra_listener_signal */
1013 port = kranal_tunables.kra_port;
1014 snprintf(name, sizeof(name), "kranal_lstn%03d", port);
1015 kportal_daemonize(name);
1016 kportal_blockallsigs();
1018 init_waitqueue_entry(&wait, current);
1020 rc = kranal_create_sock(&sock);
1024 memset(&addr, 0, sizeof(addr));
1025 addr.sin_family = AF_INET;
1026 addr.sin_port = htons(port);
1027 addr.sin_addr.s_addr = INADDR_ANY;
1029 rc = sock->ops->bind(sock, (struct sockaddr *)&addr, sizeof(addr));
1031 CERROR("Can't bind to port %d\n", port);
1035 rc = sock->ops->listen(sock, kranal_tunables.kra_backlog);
1037 CERROR("Can't set listen backlog %d: %d\n",
1038 kranal_tunables.kra_backlog, rc);
1042 LASSERT (kranal_data.kra_listener_sock == NULL);
1043 kranal_data.kra_listener_sock = sock;
1045 /* unblock waiting parent */
1046 LASSERT (kranal_data.kra_listener_shutdown == 0);
1047 up(&kranal_data.kra_listener_signal);
1049 /* Wake me any time something happens on my socket */
1050 add_wait_queue(sock->sk->sk_sleep, &wait);
1053 while (kranal_data.kra_listener_shutdown == 0) {
1056 PORTAL_ALLOC(ras, sizeof(*ras));
1058 CERROR("Out of Memory: pausing...\n");
1062 ras->ras_sock = NULL;
1065 if (ras->ras_sock == NULL) {
1066 ras->ras_sock = sock_alloc();
1067 if (ras->ras_sock == NULL) {
1068 CERROR("Can't allocate socket: pausing...\n");
1072 /* XXX this should add a ref to sock->ops->owner, if
1073 * TCP could be a module */
1074 ras->ras_sock->type = sock->type;
1075 ras->ras_sock->ops = sock->ops;
1078 set_current_state(TASK_INTERRUPTIBLE);
1080 rc = sock->ops->accept(sock, ras->ras_sock, O_NONBLOCK);
1082 /* Sleep for socket activity? */
1083 if (rc == -EAGAIN &&
1084 kranal_data.kra_listener_shutdown == 0)
1087 set_current_state(TASK_RUNNING);
1090 spin_lock_irqsave(&kranal_data.kra_connd_lock, flags);
1092 list_add_tail(&ras->ras_list,
1093 &kranal_data.kra_connd_acceptq);
1095 spin_unlock_irqrestore(&kranal_data.kra_connd_lock, flags);
1096 wake_up(&kranal_data.kra_connd_waitq);
1102 if (rc != -EAGAIN) {
1103 CERROR("Accept failed: %d, pausing...\n", rc);
1109 if (ras->ras_sock != NULL)
1110 sock_release(ras->ras_sock);
1111 PORTAL_FREE(ras, sizeof(*ras));
1115 remove_wait_queue(sock->sk->sk_sleep, &wait);
1118 kranal_data.kra_listener_sock = NULL;
1120 /* set completion status and unblock thread waiting for me
1121 * (parent on startup failure, executioner on normal shutdown) */
1122 kranal_data.kra_listener_shutdown = rc;
1123 up(&kranal_data.kra_listener_signal);
1129 kranal_start_listener (void)
1134 CDEBUG(D_NET, "Starting listener\n");
1136 /* Called holding kra_nid_mutex: listener stopped */
1137 LASSERT (kranal_data.kra_listener_sock == NULL);
1139 kranal_data.kra_listener_shutdown = 0;
1140 pid = kernel_thread(kranal_listener, NULL, 0);
1142 CERROR("Can't spawn listener: %ld\n", pid);
1146 /* Block until listener has started up. */
1147 down(&kranal_data.kra_listener_signal);
1149 rc = kranal_data.kra_listener_shutdown;
1150 LASSERT ((rc != 0) == (kranal_data.kra_listener_sock == NULL));
1152 CDEBUG(D_NET, "Listener %ld started OK\n", pid);
1157 kranal_stop_listener(int clear_acceptq)
1159 struct list_head zombie_accepts;
1160 unsigned long flags;
1161 kra_acceptsock_t *ras;
1163 CDEBUG(D_NET, "Stopping listener\n");
1165 /* Called holding kra_nid_mutex: listener running */
1166 LASSERT (kranal_data.kra_listener_sock != NULL);
1168 kranal_data.kra_listener_shutdown = 1;
1169 wake_up_all(kranal_data.kra_listener_sock->sk->sk_sleep);
1171 /* Block until listener has torn down. */
1172 down(&kranal_data.kra_listener_signal);
1174 LASSERT (kranal_data.kra_listener_sock == NULL);
1175 CDEBUG(D_NET, "Listener stopped\n");
1180 /* Close any unhandled accepts */
1181 spin_lock_irqsave(&kranal_data.kra_connd_lock, flags);
1183 list_add(&zombie_accepts, &kranal_data.kra_connd_acceptq);
1184 list_del_init(&kranal_data.kra_connd_acceptq);
1186 spin_unlock_irqrestore(&kranal_data.kra_connd_lock, flags);
1188 while (!list_empty(&zombie_accepts)) {
1189 ras = list_entry(zombie_accepts.next,
1190 kra_acceptsock_t, ras_list);
1191 list_del(&ras->ras_list);
1192 kranal_free_acceptsock(ras);
1197 kranal_listener_procint(ctl_table *table, int write, struct file *filp,
1198 void *buffer, size_t *lenp)
1200 int *tunable = (int *)table->data;
1204 /* No race with nal initialisation since the nal is setup all the time
1205 * it's loaded. When that changes, change this! */
1206 LASSERT (kranal_data.kra_init == RANAL_INIT_ALL);
1208 down(&kranal_data.kra_nid_mutex);
1210 LASSERT (tunable == &kranal_tunables.kra_port ||
1211 tunable == &kranal_tunables.kra_backlog);
1214 rc = proc_dointvec(table, write, filp, buffer, lenp);
1217 (*tunable != old_val ||
1218 kranal_data.kra_listener_sock == NULL)) {
1220 if (kranal_data.kra_listener_sock != NULL)
1221 kranal_stop_listener(0);
1223 rc = kranal_start_listener();
1226 CWARN("Unable to start listener with new tunable:"
1227 " reverting to old value\n");
1229 kranal_start_listener();
1233 up(&kranal_data.kra_nid_mutex);
1235 LASSERT (kranal_data.kra_init == RANAL_INIT_ALL);
1240 kranal_set_mynid(ptl_nid_t nid)
1242 unsigned long flags;
1243 lib_ni_t *ni = &kranal_lib.libnal_ni;
1246 CDEBUG(D_NET, "setting mynid to "LPX64" (old nid="LPX64")\n",
1247 nid, ni->ni_pid.nid);
1249 down(&kranal_data.kra_nid_mutex);
1251 if (nid == ni->ni_pid.nid) {
1252 /* no change of NID */
1253 up(&kranal_data.kra_nid_mutex);
1257 if (kranal_data.kra_listener_sock != NULL)
1258 kranal_stop_listener(1);
1260 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
1261 kranal_data.kra_peerstamp++;
1262 ni->ni_pid.nid = nid;
1263 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
1265 /* Delete all existing peers and their connections after new
1266 * NID/connstamp set to ensure no old connections in our brave
1268 kranal_del_peer(PTL_NID_ANY, 0);
1270 if (nid != PTL_NID_ANY)
1271 rc = kranal_start_listener();
1273 up(&kranal_data.kra_nid_mutex);
1278 kranal_create_peer (ptl_nid_t nid)
1282 LASSERT (nid != PTL_NID_ANY);
1284 PORTAL_ALLOC(peer, sizeof(*peer));
1288 memset(peer, 0, sizeof(*peer)); /* zero flags etc */
1290 peer->rap_nid = nid;
1291 atomic_set(&peer->rap_refcount, 1); /* 1 ref for caller */
1293 INIT_LIST_HEAD(&peer->rap_list);
1294 INIT_LIST_HEAD(&peer->rap_connd_list);
1295 INIT_LIST_HEAD(&peer->rap_conns);
1296 INIT_LIST_HEAD(&peer->rap_tx_queue);
1298 peer->rap_reconnect_time = CURRENT_SECONDS;
1299 peer->rap_reconnect_interval = RANAL_MIN_RECONNECT_INTERVAL;
1301 atomic_inc(&kranal_data.kra_npeers);
1306 kranal_destroy_peer (kra_peer_t *peer)
1308 CDEBUG(D_NET, "peer "LPX64" %p deleted\n", peer->rap_nid, peer);
1310 LASSERT (atomic_read(&peer->rap_refcount) == 0);
1311 LASSERT (peer->rap_persistence == 0);
1312 LASSERT (!kranal_peer_active(peer));
1313 LASSERT (!peer->rap_connecting);
1314 LASSERT (list_empty(&peer->rap_conns));
1315 LASSERT (list_empty(&peer->rap_tx_queue));
1316 LASSERT (list_empty(&peer->rap_connd_list));
1318 PORTAL_FREE(peer, sizeof(*peer));
1320 /* NB a peer's connections keep a reference on their peer until
1321 * they are destroyed, so we can be assured that _all_ state to do
1322 * with this peer has been cleaned up when its refcount drops to
1324 atomic_dec(&kranal_data.kra_npeers);
1328 kranal_find_peer_locked (ptl_nid_t nid)
1330 struct list_head *peer_list = kranal_nid2peerlist(nid);
1331 struct list_head *tmp;
1334 list_for_each (tmp, peer_list) {
1336 peer = list_entry(tmp, kra_peer_t, rap_list);
1338 LASSERT (peer->rap_persistence > 0 || /* persistent peer */
1339 !list_empty(&peer->rap_conns)); /* active conn */
1341 if (peer->rap_nid != nid)
1344 CDEBUG(D_NET, "got peer [%p] -> "LPX64" (%d)\n",
1345 peer, nid, atomic_read(&peer->rap_refcount));
1352 kranal_find_peer (ptl_nid_t nid)
1356 read_lock(&kranal_data.kra_global_lock);
1357 peer = kranal_find_peer_locked(nid);
1358 if (peer != NULL) /* +1 ref for caller? */
1359 kranal_peer_addref(peer);
1360 read_unlock(&kranal_data.kra_global_lock);
1366 kranal_unlink_peer_locked (kra_peer_t *peer)
1368 LASSERT (peer->rap_persistence == 0);
1369 LASSERT (list_empty(&peer->rap_conns));
1371 LASSERT (kranal_peer_active(peer));
1372 list_del_init(&peer->rap_list);
1374 /* lose peerlist's ref */
1375 kranal_peer_decref(peer);
1379 kranal_get_peer_info (int index, ptl_nid_t *nidp, __u32 *ipp, int *portp,
1383 struct list_head *ptmp;
1386 read_lock(&kranal_data.kra_global_lock);
1388 for (i = 0; i < kranal_data.kra_peer_hash_size; i++) {
1390 list_for_each(ptmp, &kranal_data.kra_peers[i]) {
1392 peer = list_entry(ptmp, kra_peer_t, rap_list);
1393 LASSERT (peer->rap_persistence > 0 ||
1394 !list_empty(&peer->rap_conns));
1399 *nidp = peer->rap_nid;
1400 *ipp = peer->rap_ip;
1401 *portp = peer->rap_port;
1402 *persistencep = peer->rap_persistence;
1404 read_unlock(&kranal_data.kra_global_lock);
1409 read_unlock(&kranal_data.kra_global_lock);
1414 kranal_add_persistent_peer (ptl_nid_t nid, __u32 ip, int port)
1416 unsigned long flags;
1420 if (nid == PTL_NID_ANY)
1423 peer = kranal_create_peer(nid);
1427 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
1429 peer2 = kranal_find_peer_locked(nid);
1430 if (peer2 != NULL) {
1431 kranal_peer_decref(peer);
1434 /* peer table takes existing ref on peer */
1435 list_add_tail(&peer->rap_list,
1436 kranal_nid2peerlist(nid));
1440 peer->rap_port = port;
1441 peer->rap_persistence++;
1443 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
1448 kranal_del_peer_locked (kra_peer_t *peer, int single_share)
1450 struct list_head *ctmp;
1451 struct list_head *cnxt;
1455 peer->rap_persistence = 0;
1456 else if (peer->rap_persistence > 0)
1457 peer->rap_persistence--;
1459 if (peer->rap_persistence != 0)
1462 if (list_empty(&peer->rap_conns)) {
1463 kranal_unlink_peer_locked(peer);
1465 list_for_each_safe(ctmp, cnxt, &peer->rap_conns) {
1466 conn = list_entry(ctmp, kra_conn_t, rac_list);
1468 kranal_close_conn_locked(conn, 0);
1470 /* peer unlinks itself when last conn is closed */
1475 kranal_del_peer (ptl_nid_t nid, int single_share)
1477 unsigned long flags;
1478 struct list_head *ptmp;
1479 struct list_head *pnxt;
1486 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
1488 if (nid != PTL_NID_ANY)
1489 lo = hi = kranal_nid2peerlist(nid) - kranal_data.kra_peers;
1492 hi = kranal_data.kra_peer_hash_size - 1;
1495 for (i = lo; i <= hi; i++) {
1496 list_for_each_safe (ptmp, pnxt, &kranal_data.kra_peers[i]) {
1497 peer = list_entry(ptmp, kra_peer_t, rap_list);
1498 LASSERT (peer->rap_persistence > 0 ||
1499 !list_empty(&peer->rap_conns));
1501 if (!(nid == PTL_NID_ANY || peer->rap_nid == nid))
1504 kranal_del_peer_locked(peer, single_share);
1505 rc = 0; /* matched something */
1512 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
1518 kranal_get_conn_by_idx (int index)
1521 struct list_head *ptmp;
1523 struct list_head *ctmp;
1526 read_lock (&kranal_data.kra_global_lock);
1528 for (i = 0; i < kranal_data.kra_peer_hash_size; i++) {
1529 list_for_each (ptmp, &kranal_data.kra_peers[i]) {
1531 peer = list_entry(ptmp, kra_peer_t, rap_list);
1532 LASSERT (peer->rap_persistence > 0 ||
1533 !list_empty(&peer->rap_conns));
1535 list_for_each (ctmp, &peer->rap_conns) {
1539 conn = list_entry(ctmp, kra_conn_t, rac_list);
1540 CDEBUG(D_NET, "++conn[%p] -> "LPX64" (%d)\n",
1541 conn, conn->rac_peer->rap_nid,
1542 atomic_read(&conn->rac_refcount));
1543 atomic_inc(&conn->rac_refcount);
1544 read_unlock(&kranal_data.kra_global_lock);
1550 read_unlock(&kranal_data.kra_global_lock);
1555 kranal_close_peer_conns_locked (kra_peer_t *peer, int why)
1558 struct list_head *ctmp;
1559 struct list_head *cnxt;
1562 list_for_each_safe (ctmp, cnxt, &peer->rap_conns) {
1563 conn = list_entry(ctmp, kra_conn_t, rac_list);
1566 kranal_close_conn_locked(conn, why);
1573 kranal_close_matching_conns (ptl_nid_t nid)
1575 unsigned long flags;
1577 struct list_head *ptmp;
1578 struct list_head *pnxt;
1584 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
1586 if (nid != PTL_NID_ANY)
1587 lo = hi = kranal_nid2peerlist(nid) - kranal_data.kra_peers;
1590 hi = kranal_data.kra_peer_hash_size - 1;
1593 for (i = lo; i <= hi; i++) {
1594 list_for_each_safe (ptmp, pnxt, &kranal_data.kra_peers[i]) {
1596 peer = list_entry(ptmp, kra_peer_t, rap_list);
1597 LASSERT (peer->rap_persistence > 0 ||
1598 !list_empty(&peer->rap_conns));
1600 if (!(nid == PTL_NID_ANY || nid == peer->rap_nid))
1603 count += kranal_close_peer_conns_locked(peer, 0);
1607 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
1609 /* wildcards always succeed */
1610 if (nid == PTL_NID_ANY)
1613 return (count == 0) ? -ENOENT : 0;
1617 kranal_cmd(struct portals_cfg *pcfg, void * private)
1621 LASSERT (pcfg != NULL);
1623 switch(pcfg->pcfg_command) {
1624 case NAL_CMD_GET_PEER: {
1628 int share_count = 0;
1630 rc = kranal_get_peer_info(pcfg->pcfg_count,
1631 &nid, &ip, &port, &share_count);
1632 pcfg->pcfg_nid = nid;
1633 pcfg->pcfg_size = 0;
1635 pcfg->pcfg_misc = port;
1636 pcfg->pcfg_count = 0;
1637 pcfg->pcfg_wait = share_count;
1640 case NAL_CMD_ADD_PEER: {
1641 rc = kranal_add_persistent_peer(pcfg->pcfg_nid,
1642 pcfg->pcfg_id, /* IP */
1643 pcfg->pcfg_misc); /* port */
1646 case NAL_CMD_DEL_PEER: {
1647 rc = kranal_del_peer(pcfg->pcfg_nid,
1648 /* flags == single_share */
1649 pcfg->pcfg_flags != 0);
1652 case NAL_CMD_GET_CONN: {
1653 kra_conn_t *conn = kranal_get_conn_by_idx(pcfg->pcfg_count);
1659 pcfg->pcfg_nid = conn->rac_peer->rap_nid;
1660 pcfg->pcfg_id = conn->rac_device->rad_id;
1661 pcfg->pcfg_misc = 0;
1662 pcfg->pcfg_flags = 0;
1663 kranal_conn_decref(conn);
1667 case NAL_CMD_CLOSE_CONNECTION: {
1668 rc = kranal_close_matching_conns(pcfg->pcfg_nid);
1671 case NAL_CMD_REGISTER_MYNID: {
1672 if (pcfg->pcfg_nid == PTL_NID_ANY)
1675 rc = kranal_set_mynid(pcfg->pcfg_nid);
1684 kranal_free_txdescs(struct list_head *freelist)
1688 while (!list_empty(freelist)) {
1689 tx = list_entry(freelist->next, kra_tx_t, tx_list);
1691 list_del(&tx->tx_list);
1692 PORTAL_FREE(tx->tx_phys, PTL_MD_MAX_IOV * sizeof(*tx->tx_phys));
1693 PORTAL_FREE(tx, sizeof(*tx));
1698 kranal_alloc_txdescs(struct list_head *freelist, int n)
1700 int isnblk = (freelist == &kranal_data.kra_idle_nblk_txs);
1704 LASSERT (freelist == &kranal_data.kra_idle_txs ||
1705 freelist == &kranal_data.kra_idle_nblk_txs);
1706 LASSERT (list_empty(freelist));
1708 for (i = 0; i < n; i++) {
1710 PORTAL_ALLOC(tx, sizeof(*tx));
1712 CERROR("Can't allocate %stx[%d]\n",
1713 isnblk ? "nblk " : "", i);
1714 kranal_free_txdescs(freelist);
1718 PORTAL_ALLOC(tx->tx_phys,
1719 PTL_MD_MAX_IOV * sizeof(*tx->tx_phys));
1720 if (tx->tx_phys == NULL) {
1721 CERROR("Can't allocate %stx[%d]->tx_phys\n",
1722 isnblk ? "nblk " : "", i);
1724 PORTAL_FREE(tx, sizeof(*tx));
1725 kranal_free_txdescs(freelist);
1729 tx->tx_isnblk = isnblk;
1730 tx->tx_buftype = RANAL_BUF_NONE;
1731 tx->tx_msg.ram_type = RANAL_MSG_NONE;
1733 list_add(&tx->tx_list, freelist);
1740 kranal_device_init(int id, kra_device_t *dev)
1742 const int total_ntx = RANAL_NTX + RANAL_NTX_NBLK;
1746 rrc = RapkGetDeviceByIndex(id, kranal_device_callback,
1748 if (rrc != RAP_SUCCESS) {
1749 CERROR("Can't get Rapidarray Device %d: %d\n", id, rrc);
1753 rrc = RapkReserveRdma(dev->rad_handle, total_ntx);
1754 if (rrc != RAP_SUCCESS) {
1755 CERROR("Can't reserve %d RDMA descriptors"
1756 " for device %d: %d\n", total_ntx, id, rrc);
1760 rrc = RapkCreateCQ(dev->rad_handle, total_ntx, RAP_CQTYPE_SEND,
1761 &dev->rad_rdma_cqh);
1762 if (rrc != RAP_SUCCESS) {
1763 CERROR("Can't create rdma cq size %d"
1764 " for device %d: %d\n", total_ntx, id, rrc);
1768 rrc = RapkCreateCQ(dev->rad_handle, RANAL_FMA_CQ_SIZE, RAP_CQTYPE_RECV,
1770 if (rrc != RAP_SUCCESS) {
1771 CERROR("Can't create fma cq size %d"
1772 " for device %d: %d\n", RANAL_FMA_CQ_SIZE, id, rrc);
1779 RapkDestroyCQ(dev->rad_handle, dev->rad_rdma_cqh);
1781 RapkReleaseDevice(dev->rad_handle);
1787 kranal_device_fini(kra_device_t *dev)
1789 LASSERT(dev->rad_scheduler == NULL);
1790 RapkDestroyCQ(dev->rad_handle, dev->rad_fma_cqh);
1791 RapkDestroyCQ(dev->rad_handle, dev->rad_rdma_cqh);
1792 RapkReleaseDevice(dev->rad_handle);
1796 kranal_api_shutdown (nal_t *nal)
1799 unsigned long flags;
1801 if (nal->nal_refct != 0) {
1802 /* This module got the first ref */
1803 PORTAL_MODULE_UNUSE;
1807 CDEBUG(D_MALLOC, "before NAL cleanup: kmem %d\n",
1808 atomic_read(&portal_kmemory));
1810 LASSERT (nal == &kranal_api);
1812 switch (kranal_data.kra_init) {
1814 CERROR("Unexpected state %d\n", kranal_data.kra_init);
1817 case RANAL_INIT_ALL:
1818 /* stop calls to nal_cmd */
1819 libcfs_nal_cmd_unregister(RANAL);
1820 /* No new persistent peers */
1822 /* resetting my NID to unadvertises me, removes my
1823 * listener and nukes all current peers */
1824 kranal_set_mynid(PTL_NID_ANY);
1825 /* no new peers or conns */
1827 /* Wait for all peer/conn state to clean up */
1829 while (atomic_read(&kranal_data.kra_nconns) != 0 ||
1830 atomic_read(&kranal_data.kra_npeers) != 0) {
1832 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* power of 2? */
1833 "waiting for %d peers and %d conns to close down\n",
1834 atomic_read(&kranal_data.kra_npeers),
1835 atomic_read(&kranal_data.kra_nconns));
1840 case RANAL_INIT_LIB:
1841 lib_fini(&kranal_lib);
1844 case RANAL_INIT_DATA:
1848 /* Conn/Peer state all cleaned up BEFORE setting shutdown, so threads
1849 * don't have to worry about shutdown races */
1850 LASSERT (atomic_read(&kranal_data.kra_nconns) == 0);
1851 LASSERT (atomic_read(&kranal_data.kra_npeers) == 0);
1853 /* flag threads to terminate; wake and wait for them to die */
1854 kranal_data.kra_shutdown = 1;
1856 for (i = 0; i < kranal_data.kra_ndevs; i++) {
1857 kra_device_t *dev = &kranal_data.kra_devices[i];
1859 LASSERT (list_empty(&dev->rad_ready_conns));
1860 LASSERT (list_empty(&dev->rad_new_conns));
1862 spin_lock_irqsave(&dev->rad_lock, flags);
1863 wake_up(&dev->rad_waitq);
1864 spin_unlock_irqrestore(&dev->rad_lock, flags);
1867 spin_lock_irqsave(&kranal_data.kra_reaper_lock, flags);
1868 wake_up_all(&kranal_data.kra_reaper_waitq);
1869 spin_unlock_irqrestore(&kranal_data.kra_reaper_lock, flags);
1871 LASSERT (list_empty(&kranal_data.kra_connd_peers));
1872 spin_lock_irqsave(&kranal_data.kra_connd_lock, flags);
1873 wake_up_all(&kranal_data.kra_connd_waitq);
1874 spin_unlock_irqrestore(&kranal_data.kra_connd_lock, flags);
1877 while (atomic_read(&kranal_data.kra_nthreads) != 0) {
1879 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* power of 2? */
1880 "Waiting for %d threads to terminate\n",
1881 atomic_read(&kranal_data.kra_nthreads));
1885 LASSERT (atomic_read(&kranal_data.kra_npeers) == 0);
1886 if (kranal_data.kra_peers != NULL) {
1887 for (i = 0; i < kranal_data.kra_peer_hash_size; i++)
1888 LASSERT (list_empty(&kranal_data.kra_peers[i]));
1890 PORTAL_FREE(kranal_data.kra_peers,
1891 sizeof (struct list_head) *
1892 kranal_data.kra_peer_hash_size);
1895 LASSERT (atomic_read(&kranal_data.kra_nconns) == 0);
1896 if (kranal_data.kra_conns != NULL) {
1897 for (i = 0; i < kranal_data.kra_conn_hash_size; i++)
1898 LASSERT (list_empty(&kranal_data.kra_conns[i]));
1900 PORTAL_FREE(kranal_data.kra_conns,
1901 sizeof (struct list_head) *
1902 kranal_data.kra_conn_hash_size);
1905 for (i = 0; i < kranal_data.kra_ndevs; i++)
1906 kranal_device_fini(&kranal_data.kra_devices[i]);
1908 kranal_free_txdescs(&kranal_data.kra_idle_txs);
1909 kranal_free_txdescs(&kranal_data.kra_idle_nblk_txs);
1911 CDEBUG(D_MALLOC, "after NAL cleanup: kmem %d\n",
1912 atomic_read(&portal_kmemory));
1913 printk(KERN_INFO "Lustre: RapidArray NAL unloaded (final mem %d)\n",
1914 atomic_read(&portal_kmemory));
1916 kranal_data.kra_init = RANAL_INIT_NOTHING;
1920 kranal_api_startup (nal_t *nal, ptl_pid_t requested_pid,
1921 ptl_ni_limits_t *requested_limits,
1922 ptl_ni_limits_t *actual_limits)
1925 ptl_process_id_t process_id;
1926 int pkmem = atomic_read(&portal_kmemory);
1931 LASSERT (nal == &kranal_api);
1933 if (nal->nal_refct != 0) {
1934 if (actual_limits != NULL)
1935 *actual_limits = kranal_lib.libnal_ni.ni_actual_limits;
1936 /* This module got the first ref */
1941 LASSERT (kranal_data.kra_init == RANAL_INIT_NOTHING);
1943 memset(&kranal_data, 0, sizeof(kranal_data)); /* zero pointers, flags etc */
1945 /* CAVEAT EMPTOR: Every 'Fma' message includes the sender's NID and
1946 * a unique (for all time) connstamp so we can uniquely identify
1947 * the sender. The connstamp is an incrementing counter
1948 * initialised with seconds + microseconds at startup time. So we
1949 * rely on NOT creating connections more frequently on average than
1950 * 1MHz to ensure we don't use old connstamps when we reboot. */
1951 do_gettimeofday(&tv);
1952 kranal_data.kra_connstamp =
1953 kranal_data.kra_peerstamp = (((__u64)tv.tv_sec) * 1000000) + tv.tv_usec;
1955 init_MUTEX(&kranal_data.kra_nid_mutex);
1956 init_MUTEX_LOCKED(&kranal_data.kra_listener_signal);
1958 rwlock_init(&kranal_data.kra_global_lock);
1960 for (i = 0; i < RANAL_MAXDEVS; i++ ) {
1961 kra_device_t *dev = &kranal_data.kra_devices[i];
1964 INIT_LIST_HEAD(&dev->rad_ready_conns);
1965 INIT_LIST_HEAD(&dev->rad_new_conns);
1966 init_waitqueue_head(&dev->rad_waitq);
1967 spin_lock_init(&dev->rad_lock);
1970 kranal_data.kra_new_min_timeout = MAX_SCHEDULE_TIMEOUT;
1971 init_waitqueue_head(&kranal_data.kra_reaper_waitq);
1972 spin_lock_init(&kranal_data.kra_reaper_lock);
1974 INIT_LIST_HEAD(&kranal_data.kra_connd_acceptq);
1975 INIT_LIST_HEAD(&kranal_data.kra_connd_peers);
1976 init_waitqueue_head(&kranal_data.kra_connd_waitq);
1977 spin_lock_init(&kranal_data.kra_connd_lock);
1979 INIT_LIST_HEAD(&kranal_data.kra_idle_txs);
1980 INIT_LIST_HEAD(&kranal_data.kra_idle_nblk_txs);
1981 init_waitqueue_head(&kranal_data.kra_idle_tx_waitq);
1982 spin_lock_init(&kranal_data.kra_tx_lock);
1984 /* OK to call kranal_api_shutdown() to cleanup now */
1985 kranal_data.kra_init = RANAL_INIT_DATA;
1987 kranal_data.kra_peer_hash_size = RANAL_PEER_HASH_SIZE;
1988 PORTAL_ALLOC(kranal_data.kra_peers,
1989 sizeof(struct list_head) * kranal_data.kra_peer_hash_size);
1990 if (kranal_data.kra_peers == NULL)
1993 for (i = 0; i < kranal_data.kra_peer_hash_size; i++)
1994 INIT_LIST_HEAD(&kranal_data.kra_peers[i]);
1996 kranal_data.kra_conn_hash_size = RANAL_PEER_HASH_SIZE;
1997 PORTAL_ALLOC(kranal_data.kra_conns,
1998 sizeof(struct list_head) * kranal_data.kra_conn_hash_size);
1999 if (kranal_data.kra_conns == NULL)
2002 for (i = 0; i < kranal_data.kra_conn_hash_size; i++)
2003 INIT_LIST_HEAD(&kranal_data.kra_conns[i]);
2005 rc = kranal_alloc_txdescs(&kranal_data.kra_idle_txs, RANAL_NTX);
2009 rc = kranal_alloc_txdescs(&kranal_data.kra_idle_nblk_txs,RANAL_NTX_NBLK);
2013 process_id.pid = requested_pid;
2014 process_id.nid = PTL_NID_ANY; /* don't know my NID yet */
2016 rc = lib_init(&kranal_lib, nal, process_id,
2017 requested_limits, actual_limits);
2019 CERROR("lib_init failed: error %d\n", rc);
2023 /* lib interface initialised */
2024 kranal_data.kra_init = RANAL_INIT_LIB;
2025 /*****************************************************/
2027 rc = kranal_thread_start(kranal_reaper, NULL);
2029 CERROR("Can't spawn ranal reaper: %d\n", rc);
2033 for (i = 0; i < RANAL_N_CONND; i++) {
2034 rc = kranal_thread_start(kranal_connd, (void *)(unsigned long)i);
2036 CERROR("Can't spawn ranal connd[%d]: %d\n",
2042 LASSERT (kranal_data.kra_ndevs == 0);
2044 for (i = 0; i < sizeof(kranal_devids)/sizeof(kranal_devids[0]); i++) {
2045 LASSERT (i < RANAL_MAXDEVS);
2047 dev = &kranal_data.kra_devices[kranal_data.kra_ndevs];
2049 rc = kranal_device_init(kranal_devids[i], dev);
2051 kranal_data.kra_ndevs++;
2054 if (kranal_data.kra_ndevs == 0) {
2055 CERROR("Can't initialise any RapidArray devices\n");
2059 for (i = 0; i < kranal_data.kra_ndevs; i++) {
2060 dev = &kranal_data.kra_devices[i];
2061 rc = kranal_thread_start(kranal_scheduler, dev);
2063 CERROR("Can't spawn ranal scheduler[%d]: %d\n",
2069 rc = libcfs_nal_cmd_register(RANAL, &kranal_cmd, NULL);
2071 CERROR("Can't initialise command interface (rc = %d)\n", rc);
2075 /* flag everything initialised */
2076 kranal_data.kra_init = RANAL_INIT_ALL;
2077 /*****************************************************/
2079 CDEBUG(D_MALLOC, "initial kmem %d\n", atomic_read(&portal_kmemory));
2080 printk(KERN_INFO "Lustre: RapidArray NAL loaded "
2081 "(initial mem %d)\n", pkmem);
2086 kranal_api_shutdown(&kranal_api);
2091 kranal_module_fini (void)
2093 if (kranal_tunables.kra_sysctl != NULL)
2094 unregister_sysctl_table(kranal_tunables.kra_sysctl);
2096 PtlNIFini(kranal_ni);
2098 ptl_unregister_nal(RANAL);
2102 kranal_module_init (void)
2106 /* the following must be sizeof(int) for
2107 * proc_dointvec/kranal_listener_procint() */
2108 LASSERT (sizeof(kranal_tunables.kra_timeout) == sizeof(int));
2109 LASSERT (sizeof(kranal_tunables.kra_listener_timeout) == sizeof(int));
2110 LASSERT (sizeof(kranal_tunables.kra_backlog) == sizeof(int));
2111 LASSERT (sizeof(kranal_tunables.kra_port) == sizeof(int));
2112 LASSERT (sizeof(kranal_tunables.kra_max_immediate) == sizeof(int));
2114 kranal_api.nal_ni_init = kranal_api_startup;
2115 kranal_api.nal_ni_fini = kranal_api_shutdown;
2117 /* Initialise dynamic tunables to defaults once only */
2118 kranal_tunables.kra_timeout = RANAL_TIMEOUT;
2119 kranal_tunables.kra_listener_timeout = RANAL_LISTENER_TIMEOUT;
2120 kranal_tunables.kra_backlog = RANAL_BACKLOG;
2121 kranal_tunables.kra_port = RANAL_PORT;
2122 kranal_tunables.kra_max_immediate = RANAL_MAX_IMMEDIATE;
2124 rc = ptl_register_nal(RANAL, &kranal_api);
2126 CERROR("Can't register RANAL: %d\n", rc);
2127 return -ENOMEM; /* or something... */
2130 /* Pure gateways want the NAL started up at module load time... */
2131 rc = PtlNIInit(RANAL, LUSTRE_SRV_PTL_PID, NULL, NULL, &kranal_ni);
2132 if (rc != PTL_OK && rc != PTL_IFACE_DUP) {
2133 ptl_unregister_nal(RANAL);
2137 kranal_tunables.kra_sysctl =
2138 register_sysctl_table(kranal_top_ctl_table, 0);
2139 if (kranal_tunables.kra_sysctl == NULL) {
2140 CERROR("Can't register sysctl table\n");
2141 PtlNIFini(kranal_ni);
2142 ptl_unregister_nal(RANAL);
2149 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
2150 MODULE_DESCRIPTION("Kernel RapidArray NAL v0.01");
2151 MODULE_LICENSE("GPL");
2153 module_init(kranal_module_init);
2154 module_exit(kranal_module_fini);