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;
31 #define RANAL_SYSCTL_TIMEOUT 1
32 #define RANAL_SYSCTL_LISTENER_TIMEOUT 2
33 #define RANAL_SYSCTL_BACKLOG 3
34 #define RANAL_SYSCTL_PORT 4
35 #define RANAL_SYSCTL_MAX_IMMEDIATE 5
37 #define RANAL_SYSCTL 202
39 static ctl_table kranal_ctl_table[] = {
40 {RANAL_SYSCTL_TIMEOUT, "timeout",
41 &kranal_tunables.kra_timeout, sizeof(int),
42 0644, NULL, &proc_dointvec},
43 {RANAL_SYSCTL_LISTENER_TIMEOUT, "listener_timeout",
44 &kranal_tunables.kra_listener_timeout, sizeof(int),
45 0644, NULL, &proc_dointvec},
46 {RANAL_SYSCTL_BACKLOG, "backlog",
47 &kranal_tunables.kra_backlog, sizeof(int),
48 0644, NULL, kranal_listener_procint},
49 {RANAL_SYSCTL_PORT, "port",
50 &kranal_tunables.kra_port, sizeof(int),
51 0644, NULL, kranal_listener_procint},
52 {RANAL_SYSCTL_MAX_IMMEDIATE, "max_immediate",
53 &kranal_tunables.kra_max_immediate, sizeof(int),
54 0644, NULL, &proc_dointvec},
58 static ctl_table kranal_top_ctl_table[] = {
59 {RANAL_SYSCTL, "ranal", NULL, 0, 0555, kranal_ctl_table},
64 kranal_sock_write (struct socket *sock, void *buffer, int nob)
67 mm_segment_t oldmm = get_fs();
79 .msg_flags = MSG_DONTWAIT
82 /* We've set up the socket's send buffer to be large enough for
83 * everything we send, so a single non-blocking send should
84 * complete without error. */
87 rc = sock_sendmsg(sock, &msg, iov.iov_len);
100 kranal_sock_read (struct socket *sock, void *buffer, int nob, int timeout)
103 mm_segment_t oldmm = get_fs();
104 long ticks = timeout * HZ;
116 struct msghdr msg = {
126 /* Set receive timeout to remaining time */
127 tv = (struct timeval) {
128 .tv_sec = ticks / HZ,
129 .tv_usec = ((ticks % HZ) * 1000000) / HZ
132 rc = sock_setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO,
133 (char *)&tv, sizeof(tv));
136 CERROR("Can't set socket recv timeout %d: %d\n",
143 rc = sock_recvmsg(sock, &msg, iov.iov_len, 0);
144 ticks -= jiffies - then;
151 return -ECONNABORTED;
153 buffer = ((char *)buffer) + rc;
165 kranal_create_sock(struct socket **sockp)
170 mm_segment_t oldmm = get_fs();
172 rc = sock_create(PF_INET, SOCK_STREAM, 0, &sock);
174 CERROR("Can't create socket: %d\n", rc);
178 /* Ensure sending connection info doesn't block */
179 option = 2 * sizeof(kra_connreq_t);
181 rc = sock_setsockopt(sock, SOL_SOCKET, SO_SNDBUF,
182 (char *)&option, sizeof(option));
185 CERROR("Can't set send buffer %d: %d\n", option, rc);
191 rc = sock_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
192 (char *)&option, sizeof(option));
195 CERROR("Can't set SO_REUSEADDR: %d\n", rc);
208 kranal_pause(int ticks)
210 set_current_state(TASK_UNINTERRUPTIBLE);
211 schedule_timeout(ticks);
215 kranal_pack_connreq(kra_connreq_t *connreq, kra_conn_t *conn, ptl_nid_t dstnid)
219 memset(connreq, 0, sizeof(*connreq));
221 connreq->racr_magic = RANAL_MSG_MAGIC;
222 connreq->racr_version = RANAL_MSG_VERSION;
223 connreq->racr_devid = conn->rac_device->rad_id;
224 connreq->racr_srcnid = kranal_lib.libnal_ni.ni_pid.nid;
225 connreq->racr_dstnid = dstnid;
226 connreq->racr_peerstamp = kranal_data.kra_peerstamp;
227 connreq->racr_connstamp = conn->rac_my_connstamp;
228 connreq->racr_timeout = conn->rac_timeout;
230 rrc = RapkGetRiParams(conn->rac_rihandle, &connreq->racr_riparams);
231 LASSERT(rrc == RAP_SUCCESS);
235 kranal_recv_connreq(struct socket *sock, kra_connreq_t *connreq, int timeout)
239 rc = kranal_sock_read(sock, connreq, sizeof(*connreq), timeout);
241 CERROR("Read failed: %d\n", rc);
245 if (connreq->racr_magic != RANAL_MSG_MAGIC) {
246 if (__swab32(connreq->racr_magic) != RANAL_MSG_MAGIC) {
247 CERROR("Unexpected magic %08x\n", connreq->racr_magic);
251 __swab32s(&connreq->racr_magic);
252 __swab16s(&connreq->racr_version);
253 __swab16s(&connreq->racr_devid);
254 __swab64s(&connreq->racr_srcnid);
255 __swab64s(&connreq->racr_dstnid);
256 __swab64s(&connreq->racr_peerstamp);
257 __swab64s(&connreq->racr_connstamp);
258 __swab32s(&connreq->racr_timeout);
260 __swab32s(&connreq->racr_riparams.HostId);
261 __swab32s(&connreq->racr_riparams.FmaDomainHndl);
262 __swab32s(&connreq->racr_riparams.PTag);
263 __swab32s(&connreq->racr_riparams.CompletionCookie);
266 if (connreq->racr_version != RANAL_MSG_VERSION) {
267 CERROR("Unexpected version %d\n", connreq->racr_version);
271 if (connreq->racr_srcnid == PTL_NID_ANY ||
272 connreq->racr_dstnid == PTL_NID_ANY) {
273 CERROR("Received PTL_NID_ANY\n");
277 if (connreq->racr_timeout < RANAL_MIN_TIMEOUT) {
278 CERROR("Received timeout %d < MIN %d\n",
279 connreq->racr_timeout, RANAL_MIN_TIMEOUT);
287 kranal_close_stale_conns_locked (kra_peer_t *peer, kra_conn_t *newconn)
290 struct list_head *ctmp;
291 struct list_head *cnxt;
295 loopback = peer->rap_nid == kranal_lib.libnal_ni.ni_pid.nid;
297 list_for_each_safe (ctmp, cnxt, &peer->rap_conns) {
298 conn = list_entry(ctmp, kra_conn_t, rac_list);
303 if (conn->rac_peerstamp != newconn->rac_peerstamp) {
304 CDEBUG(D_NET, "Closing stale conn nid:"LPX64
305 " peerstamp:"LPX64"("LPX64")\n", peer->rap_nid,
306 conn->rac_peerstamp, newconn->rac_peerstamp);
307 LASSERT (conn->rac_peerstamp < newconn->rac_peerstamp);
309 kranal_close_conn_locked(conn, -ESTALE);
313 if (conn->rac_device != newconn->rac_device)
317 newconn->rac_my_connstamp == conn->rac_peer_connstamp &&
318 newconn->rac_peer_connstamp == conn->rac_my_connstamp)
321 LASSERT (conn->rac_peer_connstamp < newconn->rac_peer_connstamp);
323 CDEBUG(D_NET, "Closing stale conn nid:"LPX64
324 " connstamp:"LPX64"("LPX64")\n", peer->rap_nid,
325 conn->rac_peer_connstamp, newconn->rac_peer_connstamp);
328 kranal_close_conn_locked(conn, -ESTALE);
335 kranal_conn_isdup_locked(kra_peer_t *peer, kra_conn_t *newconn)
338 struct list_head *tmp;
341 loopback = peer->rap_nid == kranal_lib.libnal_ni.ni_pid.nid;
343 list_for_each(tmp, &peer->rap_conns) {
344 conn = list_entry(tmp, kra_conn_t, rac_list);
346 /* 'newconn' is from an earlier version of 'peer'!!! */
347 if (newconn->rac_peerstamp < conn->rac_peerstamp)
350 /* 'conn' is from an earlier version of 'peer': it will be
351 * removed when we cull stale conns later on... */
352 if (newconn->rac_peerstamp > conn->rac_peerstamp)
355 /* Different devices are OK */
356 if (conn->rac_device != newconn->rac_device)
359 /* It's me connecting to myself */
361 newconn->rac_my_connstamp == conn->rac_peer_connstamp &&
362 newconn->rac_peer_connstamp == conn->rac_my_connstamp)
365 /* 'newconn' is an earlier connection from 'peer'!!! */
366 if (newconn->rac_peer_connstamp < conn->rac_peer_connstamp)
369 /* 'conn' is an earlier connection from 'peer': it will be
370 * removed when we cull stale conns later on... */
371 if (newconn->rac_peer_connstamp > conn->rac_peer_connstamp)
374 /* 'newconn' has the SAME connection stamp; 'peer' isn't
375 * playing the game... */
383 kranal_set_conn_uniqueness (kra_conn_t *conn)
387 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
389 conn->rac_my_connstamp = kranal_data.kra_connstamp++;
391 do { /* allocate a unique cqid */
392 conn->rac_cqid = kranal_data.kra_next_cqid++;
393 } while (kranal_cqid2conn_locked(conn->rac_cqid) != NULL);
395 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
399 kranal_create_conn(kra_conn_t **connp, kra_device_t *dev)
404 LASSERT (!in_interrupt());
405 PORTAL_ALLOC(conn, sizeof(*conn));
410 memset(conn, 0, sizeof(*conn));
411 atomic_set(&conn->rac_refcount, 1);
412 INIT_LIST_HEAD(&conn->rac_list);
413 INIT_LIST_HEAD(&conn->rac_hashlist);
414 INIT_LIST_HEAD(&conn->rac_schedlist);
415 INIT_LIST_HEAD(&conn->rac_fmaq);
416 INIT_LIST_HEAD(&conn->rac_rdmaq);
417 INIT_LIST_HEAD(&conn->rac_replyq);
418 spin_lock_init(&conn->rac_lock);
420 kranal_set_conn_uniqueness(conn);
422 conn->rac_device = dev;
423 conn->rac_timeout = MAX(kranal_tunables.kra_timeout, RANAL_MIN_TIMEOUT);
424 kranal_update_reaper_timeout(conn->rac_timeout);
426 rrc = RapkCreateRi(dev->rad_handle, conn->rac_cqid,
427 &conn->rac_rihandle);
428 if (rrc != RAP_SUCCESS) {
429 CERROR("RapkCreateRi failed: %d\n", rrc);
430 PORTAL_FREE(conn, sizeof(*conn));
434 atomic_inc(&kranal_data.kra_nconns);
440 kranal_destroy_conn(kra_conn_t *conn)
444 LASSERT (!in_interrupt());
445 LASSERT (!conn->rac_scheduled);
446 LASSERT (list_empty(&conn->rac_list));
447 LASSERT (list_empty(&conn->rac_hashlist));
448 LASSERT (list_empty(&conn->rac_schedlist));
449 LASSERT (atomic_read(&conn->rac_refcount) == 0);
450 LASSERT (list_empty(&conn->rac_fmaq));
451 LASSERT (list_empty(&conn->rac_rdmaq));
452 LASSERT (list_empty(&conn->rac_replyq));
454 rrc = RapkDestroyRi(conn->rac_device->rad_handle,
456 LASSERT (rrc == RAP_SUCCESS);
458 if (conn->rac_peer != NULL)
459 kranal_peer_decref(conn->rac_peer);
461 PORTAL_FREE(conn, sizeof(*conn));
462 atomic_dec(&kranal_data.kra_nconns);
466 kranal_terminate_conn_locked (kra_conn_t *conn)
468 LASSERT (!in_interrupt());
469 LASSERT (conn->rac_state == RANAL_CONN_CLOSING);
470 LASSERT (!list_empty(&conn->rac_hashlist));
471 LASSERT (list_empty(&conn->rac_list));
473 /* Remove from conn hash table: no new callbacks */
474 list_del_init(&conn->rac_hashlist);
475 kranal_conn_decref(conn);
477 conn->rac_state = RANAL_CONN_CLOSED;
479 /* schedule to clear out all uncompleted comms in context of dev's
481 kranal_schedule_conn(conn);
485 kranal_close_conn_locked (kra_conn_t *conn, int error)
487 kra_peer_t *peer = conn->rac_peer;
489 CDEBUG(error == 0 ? D_NET : D_ERROR,
490 "closing conn to "LPX64": error %d\n", peer->rap_nid, error);
492 LASSERT (!in_interrupt());
493 LASSERT (conn->rac_state == RANAL_CONN_ESTABLISHED);
494 LASSERT (!list_empty(&conn->rac_hashlist));
495 LASSERT (!list_empty(&conn->rac_list));
497 list_del_init(&conn->rac_list);
499 if (list_empty(&peer->rap_conns) &&
500 peer->rap_persistence == 0) {
501 /* Non-persistent peer with no more conns... */
502 kranal_unlink_peer_locked(peer);
505 /* Reset RX timeout to ensure we wait for an incoming CLOSE for the
506 * full timeout. If we get a CLOSE we know the peer has stopped all
507 * RDMA. Otherwise if we wait for the full timeout we can also be sure
508 * all RDMA has stopped. */
509 conn->rac_last_rx = jiffies;
512 conn->rac_state = RANAL_CONN_CLOSING;
513 kranal_schedule_conn(conn); /* schedule sending CLOSE */
515 kranal_conn_decref(conn); /* lose peer's ref */
519 kranal_close_conn (kra_conn_t *conn, int error)
524 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
526 if (conn->rac_state == RANAL_CONN_ESTABLISHED)
527 kranal_close_conn_locked(conn, error);
529 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
533 kranal_set_conn_params(kra_conn_t *conn, kra_connreq_t *connreq,
534 __u32 peer_ip, int peer_port)
538 rrc = RapkSetRiParams(conn->rac_rihandle, &connreq->racr_riparams);
539 if (rrc != RAP_SUCCESS) {
540 CERROR("Error setting riparams from %u.%u.%u.%u/%d: %d\n",
541 HIPQUAD(peer_ip), peer_port, rrc);
545 conn->rac_peerstamp = connreq->racr_peerstamp;
546 conn->rac_peer_connstamp = connreq->racr_connstamp;
547 conn->rac_keepalive = RANAL_TIMEOUT2KEEPALIVE(connreq->racr_timeout);
548 kranal_update_reaper_timeout(conn->rac_keepalive);
553 kranal_passive_conn_handshake (struct socket *sock, ptl_nid_t *src_nidp,
554 ptl_nid_t *dst_nidp, kra_conn_t **connp)
556 struct sockaddr_in addr;
558 unsigned int peer_port;
559 kra_connreq_t rx_connreq;
560 kra_connreq_t tx_connreq;
568 rc = sock->ops->getname(sock, (struct sockaddr *)&addr, &len, 2);
570 CERROR("Can't get peer's IP: %d\n", rc);
574 peer_ip = ntohl(addr.sin_addr.s_addr);
575 peer_port = ntohs(addr.sin_port);
577 if (peer_port >= 1024) {
578 CERROR("Refusing unprivileged connection from %u.%u.%u.%u/%d\n",
579 HIPQUAD(peer_ip), peer_port);
580 return -ECONNREFUSED;
583 rc = kranal_recv_connreq(sock, &rx_connreq,
584 kranal_tunables.kra_listener_timeout);
586 CERROR("Can't rx connreq from %u.%u.%u.%u/%d: %d\n",
587 HIPQUAD(peer_ip), peer_port, rc);
592 if (i == kranal_data.kra_ndevs) {
593 CERROR("Can't match dev %d from %u.%u.%u.%u/%d\n",
594 rx_connreq.racr_devid, HIPQUAD(peer_ip), peer_port);
597 dev = &kranal_data.kra_devices[i];
598 if (dev->rad_id == rx_connreq.racr_devid)
602 rc = kranal_create_conn(&conn, dev);
606 kranal_pack_connreq(&tx_connreq, conn, rx_connreq.racr_srcnid);
608 rc = kranal_sock_write(sock, &tx_connreq, sizeof(tx_connreq));
610 CERROR("Can't tx connreq to %u.%u.%u.%u/%d: %d\n",
611 HIPQUAD(peer_ip), peer_port, rc);
612 kranal_conn_decref(conn);
616 rc = kranal_set_conn_params(conn, &rx_connreq, peer_ip, peer_port);
618 kranal_conn_decref(conn);
623 *src_nidp = rx_connreq.racr_srcnid;
624 *dst_nidp = rx_connreq.racr_dstnid;
629 ranal_connect_sock(kra_peer_t *peer, struct socket **sockp)
631 struct sockaddr_in locaddr;
632 struct sockaddr_in srvaddr;
637 for (port = 1023; port >= 512; port--) {
639 memset(&locaddr, 0, sizeof(locaddr));
640 locaddr.sin_family = AF_INET;
641 locaddr.sin_port = htons(port);
642 locaddr.sin_addr.s_addr = htonl(INADDR_ANY);
644 memset (&srvaddr, 0, sizeof (srvaddr));
645 srvaddr.sin_family = AF_INET;
646 srvaddr.sin_port = htons (peer->rap_port);
647 srvaddr.sin_addr.s_addr = htonl (peer->rap_ip);
649 rc = kranal_create_sock(&sock);
653 rc = sock->ops->bind(sock,
654 (struct sockaddr *)&locaddr, sizeof(locaddr));
658 if (rc == -EADDRINUSE) {
659 CDEBUG(D_NET, "Port %d already in use\n", port);
663 CERROR("Can't bind to reserved port %d: %d\n", port, rc);
667 rc = sock->ops->connect(sock,
668 (struct sockaddr *)&srvaddr, sizeof(srvaddr),
677 if (rc != -EADDRNOTAVAIL) {
678 CERROR("Can't connect port %d to %u.%u.%u.%u/%d: %d\n",
679 port, HIPQUAD(peer->rap_ip), peer->rap_port, rc);
683 CDEBUG(D_NET, "Port %d not available for %u.%u.%u.%u/%d\n",
684 port, HIPQUAD(peer->rap_ip), peer->rap_port);
688 return -EHOSTUNREACH;
693 kranal_active_conn_handshake(kra_peer_t *peer,
694 ptl_nid_t *dst_nidp, kra_conn_t **connp)
696 kra_connreq_t connreq;
703 /* spread connections over all devices using both peer NIDs to ensure
704 * all nids use all devices */
705 idx = peer->rap_nid + kranal_lib.libnal_ni.ni_pid.nid;
706 dev = &kranal_data.kra_devices[idx % kranal_data.kra_ndevs];
708 rc = kranal_create_conn(&conn, dev);
712 kranal_pack_connreq(&connreq, conn, peer->rap_nid);
714 rc = ranal_connect_sock(peer, &sock);
718 /* CAVEAT EMPTOR: the passive side receives with a SHORT rx timeout
719 * immediately after accepting a connection, so we connect and then
720 * send immediately. */
722 rc = kranal_sock_write(sock, &connreq, sizeof(connreq));
724 CERROR("Can't tx connreq to %u.%u.%u.%u/%d: %d\n",
725 HIPQUAD(peer->rap_ip), peer->rap_port, rc);
729 rc = kranal_recv_connreq(sock, &connreq, kranal_tunables.kra_timeout);
731 CERROR("Can't rx connreq from %u.%u.%u.%u/%d: %d\n",
732 HIPQUAD(peer->rap_ip), peer->rap_port, rc);
739 if (connreq.racr_srcnid != peer->rap_nid) {
740 CERROR("Unexpected srcnid from %u.%u.%u.%u/%d: "
741 "received "LPX64" expected "LPX64"\n",
742 HIPQUAD(peer->rap_ip), peer->rap_port,
743 connreq.racr_srcnid, peer->rap_nid);
747 if (connreq.racr_devid != dev->rad_id) {
748 CERROR("Unexpected device id from %u.%u.%u.%u/%d: "
749 "received %d expected %d\n",
750 HIPQUAD(peer->rap_ip), peer->rap_port,
751 connreq.racr_devid, dev->rad_id);
755 rc = kranal_set_conn_params(conn, &connreq,
756 peer->rap_ip, peer->rap_port);
761 *dst_nidp = connreq.racr_dstnid;
767 kranal_conn_decref(conn);
772 kranal_conn_handshake (struct socket *sock, kra_peer_t *peer)
785 /* active: connd wants to connect to 'peer' */
786 LASSERT (peer != NULL);
787 LASSERT (peer->rap_connecting);
789 rc = kranal_active_conn_handshake(peer, &dst_nid, &conn);
793 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
795 if (!kranal_peer_active(peer)) {
796 /* raced with peer getting unlinked */
797 write_unlock_irqrestore(&kranal_data.kra_global_lock,
799 kranal_conn_decref(conn);
803 peer_nid = peer->rap_nid;
805 /* passive: listener accepted 'sock' */
806 LASSERT (peer == NULL);
808 rc = kranal_passive_conn_handshake(sock, &peer_nid,
813 /* assume this is a new peer */
814 peer = kranal_create_peer(peer_nid);
816 CERROR("Can't allocate peer for "LPX64"\n", peer_nid);
817 kranal_conn_decref(conn);
821 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
823 peer2 = kranal_find_peer_locked(peer_nid);
827 /* peer_nid already in the peer table */
828 kranal_peer_decref(peer);
833 LASSERT ((!new_peer) != (!kranal_peer_active(peer)));
835 /* Refuse connection if peer thinks we are a different NID. We check
836 * this while holding the global lock, to synch with connection
837 * destruction on NID change. */
838 if (dst_nid != kranal_lib.libnal_ni.ni_pid.nid) {
839 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
841 CERROR("Stale/bad connection with "LPX64
842 ": dst_nid "LPX64", expected "LPX64"\n",
843 peer_nid, dst_nid, kranal_lib.libnal_ni.ni_pid.nid);
848 /* Refuse to duplicate an existing connection (both sides might try to
849 * connect at once). NB we return success! We _are_ connected so we
850 * _don't_ have any blocked txs to complete with failure. */
851 rc = kranal_conn_isdup_locked(peer, conn);
853 LASSERT (!list_empty(&peer->rap_conns));
854 LASSERT (list_empty(&peer->rap_tx_queue));
855 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
856 CWARN("Not creating duplicate connection to "LPX64": %d\n",
863 /* peer table takes my ref on the new peer */
864 list_add_tail(&peer->rap_list,
865 kranal_nid2peerlist(peer_nid));
868 /* initialise timestamps before reaper looks at them */
869 conn->rac_last_tx = conn->rac_last_rx = jiffies;
871 kranal_peer_addref(peer); /* +1 ref for conn */
872 conn->rac_peer = peer;
873 list_add_tail(&conn->rac_list, &peer->rap_conns);
875 kranal_conn_addref(conn); /* +1 ref for conn table */
876 list_add_tail(&conn->rac_hashlist,
877 kranal_cqid2connlist(conn->rac_cqid));
879 /* Schedule all packets blocking for a connection */
880 while (!list_empty(&peer->rap_tx_queue)) {
881 tx = list_entry(peer->rap_tx_queue.next,
884 list_del(&tx->tx_list);
885 kranal_post_fma(conn, tx);
888 nstale = kranal_close_stale_conns_locked(peer, conn);
890 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
892 /* CAVEAT EMPTOR: passive peer can disappear NOW */
895 CWARN("Closed %d stale conns to "LPX64"\n", nstale, peer_nid);
897 /* Ensure conn gets checked. Transmits may have been queued and an
898 * FMA event may have happened before it got in the cq hash table */
899 kranal_schedule_conn(conn);
904 kranal_peer_decref(peer);
905 kranal_conn_decref(conn);
910 kranal_connect (kra_peer_t *peer)
914 struct list_head zombies;
917 LASSERT (peer->rap_connecting);
919 CDEBUG(D_NET, "About to handshake "LPX64"\n", peer->rap_nid);
921 rc = kranal_conn_handshake(NULL, peer);
923 CDEBUG(D_NET, "Done handshake "LPX64":%d \n", peer->rap_nid, rc);
925 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
927 LASSERT (peer->rap_connecting);
928 peer->rap_connecting = 0;
931 /* kranal_conn_handshake() queues blocked txs immediately on
932 * success to avoid messages jumping the queue */
933 LASSERT (list_empty(&peer->rap_tx_queue));
935 /* reset reconnection timeouts */
936 peer->rap_reconnect_interval = RANAL_MIN_RECONNECT_INTERVAL;
937 peer->rap_reconnect_time = CURRENT_SECONDS;
939 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
943 LASSERT (peer->rap_reconnect_interval != 0);
944 peer->rap_reconnect_time = CURRENT_SECONDS + peer->rap_reconnect_interval;
945 peer->rap_reconnect_interval = MAX(RANAL_MAX_RECONNECT_INTERVAL,
946 1 * peer->rap_reconnect_interval);
948 /* Grab all blocked packets while we have the global lock */
949 list_add(&zombies, &peer->rap_tx_queue);
950 list_del_init(&peer->rap_tx_queue);
952 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
954 if (list_empty(&zombies))
957 CWARN("Dropping packets for "LPX64": connection failed\n",
961 tx = list_entry(zombies.next, kra_tx_t, tx_list);
963 list_del(&tx->tx_list);
964 kranal_tx_done(tx, -EHOSTUNREACH);
966 } while (!list_empty(&zombies));
970 kranal_free_acceptsock (kra_acceptsock_t *ras)
972 sock_release(ras->ras_sock);
973 PORTAL_FREE(ras, sizeof(*ras));
977 kranal_listener (void *arg)
979 struct sockaddr_in addr;
982 kra_acceptsock_t *ras;
988 /* Parent thread holds kra_nid_mutex, and is, or is about to
989 * block on kra_listener_signal */
991 port = kranal_tunables.kra_port;
992 snprintf(name, sizeof(name), "kranal_lstn%03d", port);
993 kportal_daemonize(name);
994 kportal_blockallsigs();
996 init_waitqueue_entry(&wait, current);
998 rc = kranal_create_sock(&sock);
1002 memset(&addr, 0, sizeof(addr));
1003 addr.sin_family = AF_INET;
1004 addr.sin_port = htons(port);
1005 addr.sin_addr.s_addr = INADDR_ANY;
1007 rc = sock->ops->bind(sock, (struct sockaddr *)&addr, sizeof(addr));
1009 CERROR("Can't bind to port %d\n", port);
1013 rc = sock->ops->listen(sock, kranal_tunables.kra_backlog);
1015 CERROR("Can't set listen backlog %d: %d\n",
1016 kranal_tunables.kra_backlog, rc);
1020 LASSERT (kranal_data.kra_listener_sock == NULL);
1021 kranal_data.kra_listener_sock = sock;
1023 /* unblock waiting parent */
1024 LASSERT (kranal_data.kra_listener_shutdown == 0);
1025 up(&kranal_data.kra_listener_signal);
1027 /* Wake me any time something happens on my socket */
1028 add_wait_queue(sock->sk->sk_sleep, &wait);
1031 while (kranal_data.kra_listener_shutdown == 0) {
1034 PORTAL_ALLOC(ras, sizeof(*ras));
1036 CERROR("Out of Memory: pausing...\n");
1040 ras->ras_sock = NULL;
1043 if (ras->ras_sock == NULL) {
1044 ras->ras_sock = sock_alloc();
1045 if (ras->ras_sock == NULL) {
1046 CERROR("Can't allocate socket: pausing...\n");
1050 /* XXX this should add a ref to sock->ops->owner, if
1051 * TCP could be a module */
1052 ras->ras_sock->type = sock->type;
1053 ras->ras_sock->ops = sock->ops;
1056 set_current_state(TASK_INTERRUPTIBLE);
1058 rc = sock->ops->accept(sock, ras->ras_sock, O_NONBLOCK);
1060 /* Sleep for socket activity? */
1061 if (rc == -EAGAIN &&
1062 kranal_data.kra_listener_shutdown == 0)
1065 set_current_state(TASK_RUNNING);
1068 spin_lock_irqsave(&kranal_data.kra_connd_lock, flags);
1070 list_add_tail(&ras->ras_list,
1071 &kranal_data.kra_connd_acceptq);
1073 spin_unlock_irqrestore(&kranal_data.kra_connd_lock, flags);
1074 wake_up(&kranal_data.kra_connd_waitq);
1080 if (rc != -EAGAIN) {
1081 CERROR("Accept failed: %d, pausing...\n", rc);
1087 if (ras->ras_sock != NULL)
1088 sock_release(ras->ras_sock);
1089 PORTAL_FREE(ras, sizeof(*ras));
1093 remove_wait_queue(sock->sk->sk_sleep, &wait);
1096 kranal_data.kra_listener_sock = NULL;
1098 /* set completion status and unblock thread waiting for me
1099 * (parent on startup failure, executioner on normal shutdown) */
1100 kranal_data.kra_listener_shutdown = rc;
1101 up(&kranal_data.kra_listener_signal);
1107 kranal_start_listener (void)
1112 CDEBUG(D_NET, "Starting listener\n");
1114 /* Called holding kra_nid_mutex: listener stopped */
1115 LASSERT (kranal_data.kra_listener_sock == NULL);
1117 kranal_data.kra_listener_shutdown = 0;
1118 pid = kernel_thread(kranal_listener, NULL, 0);
1120 CERROR("Can't spawn listener: %ld\n", pid);
1124 /* Block until listener has started up. */
1125 down(&kranal_data.kra_listener_signal);
1127 rc = kranal_data.kra_listener_shutdown;
1128 LASSERT ((rc != 0) == (kranal_data.kra_listener_sock == NULL));
1130 CDEBUG(D_NET, "Listener %ld started OK\n", pid);
1135 kranal_stop_listener(int clear_acceptq)
1137 struct list_head zombie_accepts;
1138 unsigned long flags;
1139 kra_acceptsock_t *ras;
1141 CDEBUG(D_NET, "Stopping listener\n");
1143 /* Called holding kra_nid_mutex: listener running */
1144 LASSERT (kranal_data.kra_listener_sock != NULL);
1146 kranal_data.kra_listener_shutdown = 1;
1147 wake_up_all(kranal_data.kra_listener_sock->sk->sk_sleep);
1149 /* Block until listener has torn down. */
1150 down(&kranal_data.kra_listener_signal);
1152 LASSERT (kranal_data.kra_listener_sock == NULL);
1153 CDEBUG(D_NET, "Listener stopped\n");
1158 /* Close any unhandled accepts */
1159 spin_lock_irqsave(&kranal_data.kra_connd_lock, flags);
1161 list_add(&zombie_accepts, &kranal_data.kra_connd_acceptq);
1162 list_del_init(&kranal_data.kra_connd_acceptq);
1164 spin_unlock_irqrestore(&kranal_data.kra_connd_lock, flags);
1166 while (!list_empty(&zombie_accepts)) {
1167 ras = list_entry(zombie_accepts.next,
1168 kra_acceptsock_t, ras_list);
1169 list_del(&ras->ras_list);
1170 kranal_free_acceptsock(ras);
1175 kranal_listener_procint(ctl_table *table, int write, struct file *filp,
1176 void *buffer, size_t *lenp)
1178 int *tunable = (int *)table->data;
1182 /* No race with nal initialisation since the nal is setup all the time
1183 * it's loaded. When that changes, change this! */
1184 LASSERT (kranal_data.kra_init == RANAL_INIT_ALL);
1186 down(&kranal_data.kra_nid_mutex);
1188 LASSERT (tunable == &kranal_tunables.kra_port ||
1189 tunable == &kranal_tunables.kra_backlog);
1192 rc = proc_dointvec(table, write, filp, buffer, lenp);
1195 (*tunable != old_val ||
1196 kranal_data.kra_listener_sock == NULL)) {
1198 if (kranal_data.kra_listener_sock != NULL)
1199 kranal_stop_listener(0);
1201 rc = kranal_start_listener();
1204 CWARN("Unable to start listener with new tunable:"
1205 " reverting to old value\n");
1207 kranal_start_listener();
1211 up(&kranal_data.kra_nid_mutex);
1213 LASSERT (kranal_data.kra_init == RANAL_INIT_ALL);
1218 kranal_set_mynid(ptl_nid_t nid)
1220 unsigned long flags;
1221 lib_ni_t *ni = &kranal_lib.libnal_ni;
1224 CDEBUG(D_NET, "setting mynid to "LPX64" (old nid="LPX64")\n",
1225 nid, ni->ni_pid.nid);
1227 down(&kranal_data.kra_nid_mutex);
1229 if (nid == ni->ni_pid.nid) {
1230 /* no change of NID */
1231 up(&kranal_data.kra_nid_mutex);
1235 if (kranal_data.kra_listener_sock != NULL)
1236 kranal_stop_listener(1);
1238 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
1239 kranal_data.kra_peerstamp++;
1240 ni->ni_pid.nid = nid;
1241 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
1243 /* Delete all existing peers and their connections after new
1244 * NID/connstamp set to ensure no old connections in our brave
1246 kranal_del_peer(PTL_NID_ANY, 0);
1248 if (nid != PTL_NID_ANY)
1249 rc = kranal_start_listener();
1251 up(&kranal_data.kra_nid_mutex);
1256 kranal_create_peer (ptl_nid_t nid)
1260 LASSERT (nid != PTL_NID_ANY);
1262 PORTAL_ALLOC(peer, sizeof(*peer));
1266 memset(peer, 0, sizeof(*peer)); /* zero flags etc */
1268 peer->rap_nid = nid;
1269 atomic_set(&peer->rap_refcount, 1); /* 1 ref for caller */
1271 INIT_LIST_HEAD(&peer->rap_list);
1272 INIT_LIST_HEAD(&peer->rap_connd_list);
1273 INIT_LIST_HEAD(&peer->rap_conns);
1274 INIT_LIST_HEAD(&peer->rap_tx_queue);
1276 peer->rap_reconnect_time = CURRENT_SECONDS;
1277 peer->rap_reconnect_interval = RANAL_MIN_RECONNECT_INTERVAL;
1279 atomic_inc(&kranal_data.kra_npeers);
1284 kranal_destroy_peer (kra_peer_t *peer)
1286 CDEBUG(D_NET, "peer "LPX64" %p deleted\n", peer->rap_nid, peer);
1288 LASSERT (atomic_read(&peer->rap_refcount) == 0);
1289 LASSERT (peer->rap_persistence == 0);
1290 LASSERT (!kranal_peer_active(peer));
1291 LASSERT (!peer->rap_connecting);
1292 LASSERT (list_empty(&peer->rap_conns));
1293 LASSERT (list_empty(&peer->rap_tx_queue));
1294 LASSERT (list_empty(&peer->rap_connd_list));
1296 PORTAL_FREE(peer, sizeof(*peer));
1298 /* NB a peer's connections keep a reference on their peer until
1299 * they are destroyed, so we can be assured that _all_ state to do
1300 * with this peer has been cleaned up when its refcount drops to
1302 atomic_dec(&kranal_data.kra_npeers);
1306 kranal_find_peer_locked (ptl_nid_t nid)
1308 struct list_head *peer_list = kranal_nid2peerlist(nid);
1309 struct list_head *tmp;
1312 list_for_each (tmp, peer_list) {
1314 peer = list_entry(tmp, kra_peer_t, rap_list);
1316 LASSERT (peer->rap_persistence > 0 || /* persistent peer */
1317 !list_empty(&peer->rap_conns)); /* active conn */
1319 if (peer->rap_nid != nid)
1322 CDEBUG(D_NET, "got peer [%p] -> "LPX64" (%d)\n",
1323 peer, nid, atomic_read(&peer->rap_refcount));
1330 kranal_find_peer (ptl_nid_t nid)
1334 read_lock(&kranal_data.kra_global_lock);
1335 peer = kranal_find_peer_locked(nid);
1336 if (peer != NULL) /* +1 ref for caller? */
1337 kranal_peer_addref(peer);
1338 read_unlock(&kranal_data.kra_global_lock);
1344 kranal_unlink_peer_locked (kra_peer_t *peer)
1346 LASSERT (peer->rap_persistence == 0);
1347 LASSERT (list_empty(&peer->rap_conns));
1349 LASSERT (kranal_peer_active(peer));
1350 list_del_init(&peer->rap_list);
1352 /* lose peerlist's ref */
1353 kranal_peer_decref(peer);
1357 kranal_get_peer_info (int index, ptl_nid_t *nidp, __u32 *ipp, int *portp,
1361 struct list_head *ptmp;
1364 read_lock(&kranal_data.kra_global_lock);
1366 for (i = 0; i < kranal_data.kra_peer_hash_size; i++) {
1368 list_for_each(ptmp, &kranal_data.kra_peers[i]) {
1370 peer = list_entry(ptmp, kra_peer_t, rap_list);
1371 LASSERT (peer->rap_persistence > 0 ||
1372 !list_empty(&peer->rap_conns));
1377 *nidp = peer->rap_nid;
1378 *ipp = peer->rap_ip;
1379 *portp = peer->rap_port;
1380 *persistencep = peer->rap_persistence;
1382 read_unlock(&kranal_data.kra_global_lock);
1387 read_unlock(&kranal_data.kra_global_lock);
1392 kranal_add_persistent_peer (ptl_nid_t nid, __u32 ip, int port)
1394 unsigned long flags;
1398 if (nid == PTL_NID_ANY)
1401 peer = kranal_create_peer(nid);
1405 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
1407 peer2 = kranal_find_peer_locked(nid);
1408 if (peer2 != NULL) {
1409 kranal_peer_decref(peer);
1412 /* peer table takes existing ref on peer */
1413 list_add_tail(&peer->rap_list,
1414 kranal_nid2peerlist(nid));
1418 peer->rap_port = port;
1419 peer->rap_persistence++;
1421 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
1426 kranal_del_peer_locked (kra_peer_t *peer, int single_share)
1428 struct list_head *ctmp;
1429 struct list_head *cnxt;
1433 peer->rap_persistence = 0;
1434 else if (peer->rap_persistence > 0)
1435 peer->rap_persistence--;
1437 if (peer->rap_persistence != 0)
1440 if (list_empty(&peer->rap_conns)) {
1441 kranal_unlink_peer_locked(peer);
1443 list_for_each_safe(ctmp, cnxt, &peer->rap_conns) {
1444 conn = list_entry(ctmp, kra_conn_t, rac_list);
1446 kranal_close_conn_locked(conn, 0);
1448 /* peer unlinks itself when last conn is closed */
1453 kranal_del_peer (ptl_nid_t nid, int single_share)
1455 unsigned long flags;
1456 struct list_head *ptmp;
1457 struct list_head *pnxt;
1464 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
1466 if (nid != PTL_NID_ANY)
1467 lo = hi = kranal_nid2peerlist(nid) - kranal_data.kra_peers;
1470 hi = kranal_data.kra_peer_hash_size - 1;
1473 for (i = lo; i <= hi; i++) {
1474 list_for_each_safe (ptmp, pnxt, &kranal_data.kra_peers[i]) {
1475 peer = list_entry(ptmp, kra_peer_t, rap_list);
1476 LASSERT (peer->rap_persistence > 0 ||
1477 !list_empty(&peer->rap_conns));
1479 if (!(nid == PTL_NID_ANY || peer->rap_nid == nid))
1482 kranal_del_peer_locked(peer, single_share);
1483 rc = 0; /* matched something */
1490 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
1496 kranal_get_conn_by_idx (int index)
1499 struct list_head *ptmp;
1501 struct list_head *ctmp;
1504 read_lock (&kranal_data.kra_global_lock);
1506 for (i = 0; i < kranal_data.kra_peer_hash_size; i++) {
1507 list_for_each (ptmp, &kranal_data.kra_peers[i]) {
1509 peer = list_entry(ptmp, kra_peer_t, rap_list);
1510 LASSERT (peer->rap_persistence > 0 ||
1511 !list_empty(&peer->rap_conns));
1513 list_for_each (ctmp, &peer->rap_conns) {
1517 conn = list_entry(ctmp, kra_conn_t, rac_list);
1518 CDEBUG(D_NET, "++conn[%p] -> "LPX64" (%d)\n",
1519 conn, conn->rac_peer->rap_nid,
1520 atomic_read(&conn->rac_refcount));
1521 atomic_inc(&conn->rac_refcount);
1522 read_unlock(&kranal_data.kra_global_lock);
1528 read_unlock(&kranal_data.kra_global_lock);
1533 kranal_close_peer_conns_locked (kra_peer_t *peer, int why)
1536 struct list_head *ctmp;
1537 struct list_head *cnxt;
1540 list_for_each_safe (ctmp, cnxt, &peer->rap_conns) {
1541 conn = list_entry(ctmp, kra_conn_t, rac_list);
1544 kranal_close_conn_locked(conn, why);
1551 kranal_close_matching_conns (ptl_nid_t nid)
1553 unsigned long flags;
1555 struct list_head *ptmp;
1556 struct list_head *pnxt;
1562 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
1564 if (nid != PTL_NID_ANY)
1565 lo = hi = kranal_nid2peerlist(nid) - kranal_data.kra_peers;
1568 hi = kranal_data.kra_peer_hash_size - 1;
1571 for (i = lo; i <= hi; i++) {
1572 list_for_each_safe (ptmp, pnxt, &kranal_data.kra_peers[i]) {
1574 peer = list_entry(ptmp, kra_peer_t, rap_list);
1575 LASSERT (peer->rap_persistence > 0 ||
1576 !list_empty(&peer->rap_conns));
1578 if (!(nid == PTL_NID_ANY || nid == peer->rap_nid))
1581 count += kranal_close_peer_conns_locked(peer, 0);
1585 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
1587 /* wildcards always succeed */
1588 if (nid == PTL_NID_ANY)
1591 return (count == 0) ? -ENOENT : 0;
1595 kranal_cmd(struct portals_cfg *pcfg, void * private)
1599 LASSERT (pcfg != NULL);
1601 switch(pcfg->pcfg_command) {
1602 case NAL_CMD_GET_PEER: {
1606 int share_count = 0;
1608 rc = kranal_get_peer_info(pcfg->pcfg_count,
1609 &nid, &ip, &port, &share_count);
1610 pcfg->pcfg_nid = nid;
1611 pcfg->pcfg_size = 0;
1613 pcfg->pcfg_misc = port;
1614 pcfg->pcfg_count = 0;
1615 pcfg->pcfg_wait = share_count;
1618 case NAL_CMD_ADD_PEER: {
1619 rc = kranal_add_persistent_peer(pcfg->pcfg_nid,
1620 pcfg->pcfg_id, /* IP */
1621 pcfg->pcfg_misc); /* port */
1624 case NAL_CMD_DEL_PEER: {
1625 rc = kranal_del_peer(pcfg->pcfg_nid,
1626 /* flags == single_share */
1627 pcfg->pcfg_flags != 0);
1630 case NAL_CMD_GET_CONN: {
1631 kra_conn_t *conn = kranal_get_conn_by_idx(pcfg->pcfg_count);
1637 pcfg->pcfg_nid = conn->rac_peer->rap_nid;
1638 pcfg->pcfg_id = conn->rac_device->rad_id;
1639 pcfg->pcfg_misc = 0;
1640 pcfg->pcfg_flags = 0;
1641 kranal_conn_decref(conn);
1645 case NAL_CMD_CLOSE_CONNECTION: {
1646 rc = kranal_close_matching_conns(pcfg->pcfg_nid);
1649 case NAL_CMD_REGISTER_MYNID: {
1650 if (pcfg->pcfg_nid == PTL_NID_ANY)
1653 rc = kranal_set_mynid(pcfg->pcfg_nid);
1662 kranal_free_txdescs(struct list_head *freelist)
1666 while (!list_empty(freelist)) {
1667 tx = list_entry(freelist->next, kra_tx_t, tx_list);
1669 list_del(&tx->tx_list);
1670 PORTAL_FREE(tx->tx_phys, PTL_MD_MAX_IOV * sizeof(*tx->tx_phys));
1671 PORTAL_FREE(tx, sizeof(*tx));
1676 kranal_alloc_txdescs(struct list_head *freelist, int n)
1678 int isnblk = (freelist == &kranal_data.kra_idle_nblk_txs);
1682 LASSERT (freelist == &kranal_data.kra_idle_txs ||
1683 freelist == &kranal_data.kra_idle_nblk_txs);
1684 LASSERT (list_empty(freelist));
1686 for (i = 0; i < n; i++) {
1688 PORTAL_ALLOC(tx, sizeof(*tx));
1690 CERROR("Can't allocate %stx[%d]\n",
1691 isnblk ? "nblk " : "", i);
1692 kranal_free_txdescs(freelist);
1696 PORTAL_ALLOC(tx->tx_phys,
1697 PTL_MD_MAX_IOV * sizeof(*tx->tx_phys));
1698 if (tx->tx_phys == NULL) {
1699 CERROR("Can't allocate %stx[%d]->tx_phys\n",
1700 isnblk ? "nblk " : "", i);
1702 PORTAL_FREE(tx, sizeof(*tx));
1703 kranal_free_txdescs(freelist);
1707 tx->tx_isnblk = isnblk;
1708 tx->tx_buftype = RANAL_BUF_NONE;
1709 tx->tx_msg.ram_type = RANAL_MSG_NONE;
1711 list_add(&tx->tx_list, freelist);
1718 kranal_device_init(int id, kra_device_t *dev)
1720 const int total_ntx = RANAL_NTX + RANAL_NTX_NBLK;
1724 rrc = RapkGetDeviceByIndex(id, kranal_device_callback,
1726 if (rrc != RAP_SUCCESS) {
1727 CERROR("Can't get Rapidarray Device %d: %d\n", id, rrc);
1731 rrc = RapkReserveRdma(dev->rad_handle, total_ntx);
1732 if (rrc != RAP_SUCCESS) {
1733 CERROR("Can't reserve %d RDMA descriptors"
1734 " for device %d: %d\n", total_ntx, id, rrc);
1738 rrc = RapkCreateCQ(dev->rad_handle, total_ntx, RAP_CQTYPE_SEND,
1739 &dev->rad_rdma_cqh);
1740 if (rrc != RAP_SUCCESS) {
1741 CERROR("Can't create rdma cq size %d"
1742 " for device %d: %d\n", total_ntx, id, rrc);
1746 rrc = RapkCreateCQ(dev->rad_handle, RANAL_FMA_CQ_SIZE, RAP_CQTYPE_RECV,
1748 if (rrc != RAP_SUCCESS) {
1749 CERROR("Can't create fma cq size %d"
1750 " for device %d: %d\n", RANAL_FMA_CQ_SIZE, id, rrc);
1757 RapkDestroyCQ(dev->rad_handle, dev->rad_rdma_cqh);
1759 RapkReleaseDevice(dev->rad_handle);
1765 kranal_device_fini(kra_device_t *dev)
1767 LASSERT(dev->rad_scheduler == NULL);
1768 RapkDestroyCQ(dev->rad_handle, dev->rad_fma_cqh);
1769 RapkDestroyCQ(dev->rad_handle, dev->rad_rdma_cqh);
1770 RapkReleaseDevice(dev->rad_handle);
1774 kranal_api_shutdown (nal_t *nal)
1777 unsigned long flags;
1779 if (nal->nal_refct != 0) {
1780 /* This module got the first ref */
1781 PORTAL_MODULE_UNUSE;
1785 CDEBUG(D_MALLOC, "before NAL cleanup: kmem %d\n",
1786 atomic_read(&portal_kmemory));
1788 LASSERT (nal == &kranal_api);
1790 switch (kranal_data.kra_init) {
1792 CERROR("Unexpected state %d\n", kranal_data.kra_init);
1795 case RANAL_INIT_ALL:
1796 /* stop calls to nal_cmd */
1797 libcfs_nal_cmd_unregister(RANAL);
1798 /* No new persistent peers */
1800 /* resetting my NID to unadvertises me, removes my
1801 * listener and nukes all current peers */
1802 kranal_set_mynid(PTL_NID_ANY);
1803 /* no new peers or conns */
1805 /* Wait for all peer/conn state to clean up */
1807 while (atomic_read(&kranal_data.kra_nconns) != 0 ||
1808 atomic_read(&kranal_data.kra_npeers) != 0) {
1810 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* power of 2? */
1811 "waiting for %d peers and %d conns to close down\n",
1812 atomic_read(&kranal_data.kra_npeers),
1813 atomic_read(&kranal_data.kra_nconns));
1818 case RANAL_INIT_LIB:
1819 lib_fini(&kranal_lib);
1822 case RANAL_INIT_DATA:
1826 /* flag threads to terminate; wake and wait for them to die */
1827 kranal_data.kra_shutdown = 1;
1829 for (i = 0; i < kranal_data.kra_ndevs; i++) {
1830 kra_device_t *dev = &kranal_data.kra_devices[i];
1832 LASSERT (list_empty(&dev->rad_connq));
1834 spin_lock_irqsave(&dev->rad_lock, flags);
1835 wake_up(&dev->rad_waitq);
1836 spin_unlock_irqrestore(&dev->rad_lock, flags);
1839 spin_lock_irqsave(&kranal_data.kra_reaper_lock, flags);
1840 wake_up_all(&kranal_data.kra_reaper_waitq);
1841 spin_unlock_irqrestore(&kranal_data.kra_reaper_lock, flags);
1843 LASSERT (list_empty(&kranal_data.kra_connd_peers));
1844 spin_lock_irqsave(&kranal_data.kra_connd_lock, flags);
1845 wake_up_all(&kranal_data.kra_connd_waitq);
1846 spin_unlock_irqrestore(&kranal_data.kra_connd_lock, flags);
1849 while (atomic_read(&kranal_data.kra_nthreads) != 0) {
1851 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* power of 2? */
1852 "Waiting for %d threads to terminate\n",
1853 atomic_read(&kranal_data.kra_nthreads));
1857 LASSERT (atomic_read(&kranal_data.kra_npeers) == 0);
1858 if (kranal_data.kra_peers != NULL) {
1859 for (i = 0; i < kranal_data.kra_peer_hash_size; i++)
1860 LASSERT (list_empty(&kranal_data.kra_peers[i]));
1862 PORTAL_FREE(kranal_data.kra_peers,
1863 sizeof (struct list_head) *
1864 kranal_data.kra_peer_hash_size);
1867 LASSERT (atomic_read(&kranal_data.kra_nconns) == 0);
1868 if (kranal_data.kra_conns != NULL) {
1869 for (i = 0; i < kranal_data.kra_conn_hash_size; i++)
1870 LASSERT (list_empty(&kranal_data.kra_conns[i]));
1872 PORTAL_FREE(kranal_data.kra_conns,
1873 sizeof (struct list_head) *
1874 kranal_data.kra_conn_hash_size);
1877 for (i = 0; i < kranal_data.kra_ndevs; i++)
1878 kranal_device_fini(&kranal_data.kra_devices[i]);
1880 kranal_free_txdescs(&kranal_data.kra_idle_txs);
1881 kranal_free_txdescs(&kranal_data.kra_idle_nblk_txs);
1883 CDEBUG(D_MALLOC, "after NAL cleanup: kmem %d\n",
1884 atomic_read(&portal_kmemory));
1885 printk(KERN_INFO "Lustre: RapidArray NAL unloaded (final mem %d)\n",
1886 atomic_read(&portal_kmemory));
1888 kranal_data.kra_init = RANAL_INIT_NOTHING;
1892 kranal_api_startup (nal_t *nal, ptl_pid_t requested_pid,
1893 ptl_ni_limits_t *requested_limits,
1894 ptl_ni_limits_t *actual_limits)
1896 static int device_ids[] = {RAPK_MAIN_DEVICE_ID,
1897 RAPK_EXPANSION_DEVICE_ID};
1899 ptl_process_id_t process_id;
1900 int pkmem = atomic_read(&portal_kmemory);
1905 LASSERT (nal == &kranal_api);
1907 if (nal->nal_refct != 0) {
1908 if (actual_limits != NULL)
1909 *actual_limits = kranal_lib.libnal_ni.ni_actual_limits;
1910 /* This module got the first ref */
1915 LASSERT (kranal_data.kra_init == RANAL_INIT_NOTHING);
1917 memset(&kranal_data, 0, sizeof(kranal_data)); /* zero pointers, flags etc */
1919 /* CAVEAT EMPTOR: Every 'Fma' message includes the sender's NID and
1920 * a unique (for all time) connstamp so we can uniquely identify
1921 * the sender. The connstamp is an incrementing counter
1922 * initialised with seconds + microseconds at startup time. So we
1923 * rely on NOT creating connections more frequently on average than
1924 * 1MHz to ensure we don't use old connstamps when we reboot. */
1925 do_gettimeofday(&tv);
1926 kranal_data.kra_connstamp =
1927 kranal_data.kra_peerstamp = (((__u64)tv.tv_sec) * 1000000) + tv.tv_usec;
1929 init_MUTEX(&kranal_data.kra_nid_mutex);
1930 init_MUTEX_LOCKED(&kranal_data.kra_listener_signal);
1932 rwlock_init(&kranal_data.kra_global_lock);
1934 for (i = 0; i < RANAL_MAXDEVS; i++ ) {
1935 kra_device_t *dev = &kranal_data.kra_devices[i];
1938 INIT_LIST_HEAD(&dev->rad_connq);
1939 init_waitqueue_head(&dev->rad_waitq);
1940 spin_lock_init(&dev->rad_lock);
1943 kranal_data.kra_new_min_timeout = MAX_SCHEDULE_TIMEOUT;
1944 init_waitqueue_head(&kranal_data.kra_reaper_waitq);
1945 spin_lock_init(&kranal_data.kra_reaper_lock);
1947 INIT_LIST_HEAD(&kranal_data.kra_connd_acceptq);
1948 INIT_LIST_HEAD(&kranal_data.kra_connd_peers);
1949 init_waitqueue_head(&kranal_data.kra_connd_waitq);
1950 spin_lock_init(&kranal_data.kra_connd_lock);
1952 INIT_LIST_HEAD(&kranal_data.kra_idle_txs);
1953 INIT_LIST_HEAD(&kranal_data.kra_idle_nblk_txs);
1954 init_waitqueue_head(&kranal_data.kra_idle_tx_waitq);
1955 spin_lock_init(&kranal_data.kra_tx_lock);
1957 /* OK to call kranal_api_shutdown() to cleanup now */
1958 kranal_data.kra_init = RANAL_INIT_DATA;
1960 kranal_data.kra_peer_hash_size = RANAL_PEER_HASH_SIZE;
1961 PORTAL_ALLOC(kranal_data.kra_peers,
1962 sizeof(struct list_head) * kranal_data.kra_peer_hash_size);
1963 if (kranal_data.kra_peers == NULL)
1966 for (i = 0; i < kranal_data.kra_peer_hash_size; i++)
1967 INIT_LIST_HEAD(&kranal_data.kra_peers[i]);
1969 kranal_data.kra_conn_hash_size = RANAL_PEER_HASH_SIZE;
1970 PORTAL_ALLOC(kranal_data.kra_conns,
1971 sizeof(struct list_head) * kranal_data.kra_conn_hash_size);
1972 if (kranal_data.kra_conns == NULL)
1975 for (i = 0; i < kranal_data.kra_conn_hash_size; i++)
1976 INIT_LIST_HEAD(&kranal_data.kra_conns[i]);
1978 rc = kranal_alloc_txdescs(&kranal_data.kra_idle_txs, RANAL_NTX);
1982 rc = kranal_alloc_txdescs(&kranal_data.kra_idle_nblk_txs,RANAL_NTX_NBLK);
1986 process_id.pid = requested_pid;
1987 process_id.nid = PTL_NID_ANY; /* don't know my NID yet */
1989 rc = lib_init(&kranal_lib, nal, process_id,
1990 requested_limits, actual_limits);
1992 CERROR("lib_init failed: error %d\n", rc);
1996 /* lib interface initialised */
1997 kranal_data.kra_init = RANAL_INIT_LIB;
1998 /*****************************************************/
2000 rc = kranal_thread_start(kranal_reaper, NULL);
2002 CERROR("Can't spawn ranal reaper: %d\n", rc);
2006 for (i = 0; i < RANAL_N_CONND; i++) {
2007 rc = kranal_thread_start(kranal_connd, (void *)(unsigned long)i);
2009 CERROR("Can't spawn ranal connd[%d]: %d\n",
2015 LASSERT(kranal_data.kra_ndevs == 0);
2016 for (i = 0; i < sizeof(device_ids)/sizeof(device_ids[0]); i++) {
2017 dev = &kranal_data.kra_devices[kranal_data.kra_ndevs];
2019 rc = kranal_device_init(device_ids[i], dev);
2021 kranal_data.kra_ndevs++;
2023 rc = kranal_thread_start(kranal_scheduler, dev);
2025 CERROR("Can't spawn ranal scheduler[%d]: %d\n",
2031 if (kranal_data.kra_ndevs == 0)
2034 rc = libcfs_nal_cmd_register(RANAL, &kranal_cmd, NULL);
2036 CERROR("Can't initialise command interface (rc = %d)\n", rc);
2040 /* flag everything initialised */
2041 kranal_data.kra_init = RANAL_INIT_ALL;
2042 /*****************************************************/
2044 CDEBUG(D_MALLOC, "initial kmem %d\n", atomic_read(&portal_kmemory));
2045 printk(KERN_INFO "Lustre: RapidArray NAL loaded "
2046 "(initial mem %d)\n", pkmem);
2051 kranal_api_shutdown(&kranal_api);
2056 kranal_module_fini (void)
2058 if (kranal_tunables.kra_sysctl != NULL)
2059 unregister_sysctl_table(kranal_tunables.kra_sysctl);
2061 PtlNIFini(kranal_ni);
2063 ptl_unregister_nal(RANAL);
2067 kranal_module_init (void)
2071 /* the following must be sizeof(int) for
2072 * proc_dointvec/kranal_listener_procint() */
2073 LASSERT (sizeof(kranal_tunables.kra_timeout) == sizeof(int));
2074 LASSERT (sizeof(kranal_tunables.kra_listener_timeout) == sizeof(int));
2075 LASSERT (sizeof(kranal_tunables.kra_backlog) == sizeof(int));
2076 LASSERT (sizeof(kranal_tunables.kra_port) == sizeof(int));
2077 LASSERT (sizeof(kranal_tunables.kra_max_immediate) == sizeof(int));
2079 kranal_api.nal_ni_init = kranal_api_startup;
2080 kranal_api.nal_ni_fini = kranal_api_shutdown;
2082 /* Initialise dynamic tunables to defaults once only */
2083 kranal_tunables.kra_timeout = RANAL_TIMEOUT;
2084 kranal_tunables.kra_listener_timeout = RANAL_LISTENER_TIMEOUT;
2085 kranal_tunables.kra_backlog = RANAL_BACKLOG;
2086 kranal_tunables.kra_port = RANAL_PORT;
2087 kranal_tunables.kra_max_immediate = RANAL_MAX_IMMEDIATE;
2089 rc = ptl_register_nal(RANAL, &kranal_api);
2091 CERROR("Can't register RANAL: %d\n", rc);
2092 return -ENOMEM; /* or something... */
2095 /* Pure gateways want the NAL started up at module load time... */
2096 rc = PtlNIInit(RANAL, LUSTRE_SRV_PTL_PID, NULL, NULL, &kranal_ni);
2097 if (rc != PTL_OK && rc != PTL_IFACE_DUP) {
2098 ptl_unregister_nal(RANAL);
2102 kranal_tunables.kra_sysctl =
2103 register_sysctl_table(kranal_top_ctl_table, 0);
2104 if (kranal_tunables.kra_sysctl == NULL) {
2105 CERROR("Can't register sysctl table\n");
2106 PtlNIFini(kranal_ni);
2107 ptl_unregister_nal(RANAL);
2114 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
2115 MODULE_DESCRIPTION("Kernel RapidArray NAL v0.01");
2116 MODULE_LICENSE("GPL");
2118 module_init(kranal_module_init);
2119 module_exit(kranal_module_fini);