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)
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 = conn->rac_peer->rap_nid;
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);
396 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
400 kranal_create_conn(kra_conn_t **connp, kra_device_t *dev)
405 LASSERT (!in_interrupt());
406 PORTAL_ALLOC(conn, sizeof(*conn));
411 memset(conn, 0, sizeof(*conn));
412 atomic_set(&conn->rac_refcount, 1);
413 INIT_LIST_HEAD(&conn->rac_list);
414 INIT_LIST_HEAD(&conn->rac_hashlist);
415 INIT_LIST_HEAD(&conn->rac_schedlist);
416 INIT_LIST_HEAD(&conn->rac_fmaq);
417 INIT_LIST_HEAD(&conn->rac_rdmaq);
418 INIT_LIST_HEAD(&conn->rac_replyq);
419 spin_lock_init(&conn->rac_lock);
421 kranal_set_conn_uniqueness(conn);
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
507 conn->rac_last_rx = jiffies;
510 conn->rac_state = RANAL_CONN_CLOSING;
511 kranal_schedule_conn(conn); /* schedule sending CLOSE */
513 kranal_conn_decref(conn); /* lose peer's ref */
517 kranal_close_conn (kra_conn_t *conn, int error)
522 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
524 if (conn->rac_state == RANAL_CONN_ESTABLISHED)
525 kranal_close_conn_locked(conn, error);
527 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
531 kranal_set_conn_params(kra_conn_t *conn, kra_connreq_t *connreq,
532 __u32 peer_ip, int peer_port)
536 rrc = RapkSetRiParams(conn->rac_rihandle, &connreq->racr_riparams);
537 if (rrc != RAP_SUCCESS) {
538 CERROR("Error setting riparams from %u.%u.%u.%u/%d: %d\n",
539 HIPQUAD(peer_ip), peer_port, rrc);
543 conn->rac_peerstamp = connreq->racr_peerstamp;
544 conn->rac_peer_connstamp = connreq->racr_connstamp;
545 conn->rac_keepalive = RANAL_TIMEOUT2KEEPALIVE(connreq->racr_timeout);
546 kranal_update_reaper_timeout(conn->rac_keepalive);
551 kranal_passive_conn_handshake (struct socket *sock, ptl_nid_t *src_nidp,
552 ptl_nid_t *dst_nidp, kra_conn_t **connp)
554 struct sockaddr_in addr;
556 unsigned int peer_port;
557 kra_connreq_t connreq;
567 rc = sock->ops->getname(sock, (struct sockaddr *)&addr, &len, 2);
569 CERROR("Can't get peer's IP: %d\n", rc);
573 peer_ip = ntohl(addr.sin_addr.s_addr);
574 peer_port = ntohs(addr.sin_port);
576 if (peer_port >= 1024) {
577 CERROR("Refusing unprivileged connection from %u.%u.%u.%u/%d\n",
578 HIPQUAD(peer_ip), peer_port);
579 return -ECONNREFUSED;
582 rc = kranal_recv_connreq(sock, &connreq,
583 kranal_tunables.kra_listener_timeout);
585 CERROR("Can't rx connreq from %u.%u.%u.%u/%d: %d\n",
586 HIPQUAD(peer_ip), peer_port, rc);
590 src_nid = connreq.racr_srcnid;
591 dst_nid = connreq.racr_dstnid;
594 if (i == kranal_data.kra_ndevs) {
595 CERROR("Can't match dev %d from %u.%u.%u.%u/%d\n",
596 connreq.racr_devid, HIPQUAD(peer_ip), peer_port);
599 dev = &kranal_data.kra_devices[i];
600 if (dev->rad_id == connreq.racr_devid)
604 rc = kranal_create_conn(&conn, dev);
608 rc = kranal_set_conn_params(conn, &connreq, peer_ip, peer_port);
610 kranal_conn_decref(conn);
614 kranal_pack_connreq(&connreq, conn);
616 rc = kranal_sock_write(sock, &connreq, sizeof(connreq));
618 CERROR("Can't tx connreq to %u.%u.%u.%u/%d: %d\n",
619 HIPQUAD(peer_ip), peer_port, rc);
620 kranal_conn_decref(conn);
631 ranal_connect_sock(kra_peer_t *peer, struct socket **sockp)
633 struct sockaddr_in locaddr;
634 struct sockaddr_in srvaddr;
639 for (port = 1023; port >= 512; port--) {
641 memset(&locaddr, 0, sizeof(locaddr));
642 locaddr.sin_family = AF_INET;
643 locaddr.sin_port = htons(port);
644 locaddr.sin_addr.s_addr = htonl(INADDR_ANY);
646 memset (&srvaddr, 0, sizeof (srvaddr));
647 srvaddr.sin_family = AF_INET;
648 srvaddr.sin_port = htons (peer->rap_port);
649 srvaddr.sin_addr.s_addr = htonl (peer->rap_ip);
651 rc = kranal_create_sock(&sock);
655 rc = sock->ops->bind(sock,
656 (struct sockaddr *)&locaddr, sizeof(locaddr));
660 if (rc == -EADDRINUSE) {
661 CDEBUG(D_NET, "Port %d already in use\n", port);
665 CERROR("Can't bind to reserved port %d: %d\n", port, rc);
669 rc = sock->ops->connect(sock,
670 (struct sockaddr *)&srvaddr, sizeof(srvaddr),
679 if (rc != -EADDRNOTAVAIL) {
680 CERROR("Can't connect port %d to %u.%u.%u.%u/%d: %d\n",
681 port, HIPQUAD(peer->rap_ip), peer->rap_port, rc);
685 CDEBUG(D_NET, "Port %d not available for %u.%u.%u.%u/%d\n",
686 port, HIPQUAD(peer->rap_ip), peer->rap_port);
690 return -EHOSTUNREACH;
695 kranal_active_conn_handshake(kra_peer_t *peer,
696 ptl_nid_t *dst_nidp, kra_conn_t **connp)
698 kra_connreq_t connreq;
705 /* spread connections over all devices using both peer NIDs to ensure
706 * all nids use all devices */
707 idx = peer->rap_nid + kranal_lib.libnal_ni.ni_pid.nid;
708 dev = &kranal_data.kra_devices[idx % kranal_data.kra_ndevs];
710 rc = kranal_create_conn(&conn, dev);
714 kranal_pack_connreq(&connreq, conn);
716 rc = ranal_connect_sock(peer, &sock);
720 /* CAVEAT EMPTOR: the passive side receives with a SHORT rx timeout
721 * immediately after accepting a connection, so we connect and then
722 * send immediately. */
724 rc = kranal_sock_write(sock, &connreq, sizeof(connreq));
726 CERROR("Can't tx connreq to %u.%u.%u.%u/%d: %d\n",
727 HIPQUAD(peer->rap_ip), peer->rap_port, rc);
731 rc = kranal_recv_connreq(sock, &connreq, kranal_tunables.kra_timeout);
733 CERROR("Can't rx connreq from %u.%u.%u.%u/%d: %d\n",
734 HIPQUAD(peer->rap_ip), peer->rap_port, rc);
741 if (connreq.racr_srcnid != peer->rap_nid) {
742 CERROR("Unexpected srcnid from %u.%u.%u.%u/%d: "
743 "received "LPX64" expected "LPX64"\n",
744 HIPQUAD(peer->rap_ip), peer->rap_port,
745 connreq.racr_srcnid, peer->rap_nid);
749 if (connreq.racr_devid != dev->rad_id) {
750 CERROR("Unexpected device id from %u.%u.%u.%u/%d: "
751 "received %d expected %d\n",
752 HIPQUAD(peer->rap_ip), peer->rap_port,
753 connreq.racr_devid, dev->rad_id);
757 rc = kranal_set_conn_params(conn, &connreq,
758 peer->rap_ip, peer->rap_port);
763 *dst_nidp = connreq.racr_dstnid;
769 kranal_conn_decref(conn);
774 kranal_conn_handshake (struct socket *sock, kra_peer_t *peer)
787 /* active: connd wants to connect to 'peer' */
788 LASSERT (peer != NULL);
789 LASSERT (peer->rap_connecting);
791 rc = kranal_active_conn_handshake(peer, &dst_nid, &conn);
795 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
797 if (!kranal_peer_active(peer)) {
798 /* raced with peer getting unlinked */
799 write_unlock_irqrestore(&kranal_data.kra_global_lock,
801 kranal_conn_decref(conn);
805 peer_nid = peer->rap_nid;
807 /* passive: listener accepted 'sock' */
808 LASSERT (peer == NULL);
810 rc = kranal_passive_conn_handshake(sock, &peer_nid,
815 /* assume this is a new peer */
816 peer = kranal_create_peer(peer_nid);
818 CERROR("Can't allocate peer for "LPX64"\n", peer_nid);
819 kranal_conn_decref(conn);
823 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
825 peer2 = kranal_find_peer_locked(peer_nid);
829 /* peer_nid already in the peer table */
830 kranal_peer_decref(peer);
835 LASSERT (!new_peer == !kranal_peer_active(peer));
837 /* Refuse connection if peer thinks we are a different NID. We check
838 * this while holding the global lock, to synch with connection
839 * destruction on NID change. */
840 if (dst_nid != kranal_lib.libnal_ni.ni_pid.nid) {
841 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
843 CERROR("Stale/bad connection with "LPX64
844 ": dst_nid "LPX64", expected "LPX64"\n",
845 peer_nid, dst_nid, kranal_lib.libnal_ni.ni_pid.nid);
850 /* Refuse to duplicate an existing connection (both sides might try to
851 * connect at once). NB we return success! We _are_ connected so we
852 * _don't_ have any blocked txs to complete with failure. */
853 rc = kranal_conn_isdup_locked(peer, conn);
855 LASSERT (!list_empty(&peer->rap_conns));
856 LASSERT (list_empty(&peer->rap_tx_queue));
857 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
858 CWARN("Not creating duplicate connection to "LPX64": %d\n",
865 /* peer table takes my ref on the new peer */
866 list_add_tail(&peer->rap_list,
867 kranal_nid2peerlist(peer_nid));
870 kranal_peer_addref(peer); /* +1 ref for conn */
871 conn->rac_peer = peer;
872 list_add_tail(&conn->rac_list, &peer->rap_conns);
874 kranal_conn_addref(conn); /* +1 ref for conn table */
875 list_add_tail(&conn->rac_hashlist,
876 kranal_cqid2connlist(conn->rac_cqid));
878 /* Schedule all packets blocking for a connection */
879 while (!list_empty(&peer->rap_tx_queue)) {
880 tx = list_entry(peer->rap_tx_queue.next,
883 list_del(&tx->tx_list);
884 kranal_post_fma(conn, tx);
887 nstale = kranal_close_stale_conns_locked(peer, conn);
889 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
891 /* CAVEAT EMPTOR: passive peer can disappear NOW */
894 CWARN("Closed %d stale conns to "LPX64"\n", nstale, peer_nid);
896 /* Ensure conn gets checked. Transmits may have been queued and an
897 * FMA event may have happened before it got in the cq hash table */
898 kranal_schedule_conn(conn);
903 kranal_peer_decref(peer);
904 kranal_conn_decref(conn);
909 kranal_connect (kra_peer_t *peer)
913 struct list_head zombies;
916 LASSERT (peer->rap_connecting);
918 rc = kranal_conn_handshake(NULL, peer);
920 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
922 LASSERT (peer->rap_connecting);
923 peer->rap_connecting = 0;
926 /* kranal_conn_handshake() queues blocked txs immediately on
927 * success to avoid messages jumping the queue */
928 LASSERT (list_empty(&peer->rap_tx_queue));
930 /* reset reconnection timeouts */
931 peer->rap_reconnect_interval = RANAL_MIN_RECONNECT_INTERVAL;
932 peer->rap_reconnect_time = CURRENT_SECONDS;
934 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
938 LASSERT (peer->rap_reconnect_interval != 0);
939 peer->rap_reconnect_time = CURRENT_SECONDS + peer->rap_reconnect_interval;
940 peer->rap_reconnect_interval = MAX(RANAL_MAX_RECONNECT_INTERVAL,
941 1 * peer->rap_reconnect_interval);
943 /* Grab all blocked packets while we have the global lock */
944 list_add(&zombies, &peer->rap_tx_queue);
945 list_del_init(&peer->rap_tx_queue);
947 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
949 if (list_empty(&zombies))
952 CWARN("Dropping packets for "LPX64": connection failed\n",
956 tx = list_entry(zombies.next, kra_tx_t, tx_list);
958 list_del(&tx->tx_list);
959 kranal_tx_done(tx, -EHOSTUNREACH);
961 } while (!list_empty(&zombies));
965 kranal_free_acceptsock (kra_acceptsock_t *ras)
967 sock_release(ras->ras_sock);
968 PORTAL_FREE(ras, sizeof(*ras));
972 kranal_listener (void *arg)
974 struct sockaddr_in addr;
977 kra_acceptsock_t *ras;
983 /* Parent thread holds kra_nid_mutex, and is, or is about to
984 * block on kra_listener_signal */
986 port = kranal_tunables.kra_port;
987 snprintf(name, sizeof(name), "kranal_lstn%03d", port);
988 kportal_daemonize(name);
989 kportal_blockallsigs();
991 init_waitqueue_entry(&wait, current);
993 rc = kranal_create_sock(&sock);
997 memset(&addr, 0, sizeof(addr));
998 addr.sin_family = AF_INET;
999 addr.sin_port = htons(port);
1000 addr.sin_addr.s_addr = INADDR_ANY;
1002 rc = sock->ops->bind(sock, (struct sockaddr *)&addr, sizeof(addr));
1004 CERROR("Can't bind to port %d\n", port);
1008 rc = sock->ops->listen(sock, kranal_tunables.kra_backlog);
1010 CERROR("Can't set listen backlog %d: %d\n",
1011 kranal_tunables.kra_backlog, rc);
1015 LASSERT (kranal_data.kra_listener_sock == NULL);
1016 kranal_data.kra_listener_sock = sock;
1018 /* unblock waiting parent */
1019 LASSERT (kranal_data.kra_listener_shutdown == 0);
1020 up(&kranal_data.kra_listener_signal);
1022 /* Wake me any time something happens on my socket */
1023 add_wait_queue(sock->sk->sk_sleep, &wait);
1026 while (kranal_data.kra_listener_shutdown == 0) {
1029 PORTAL_ALLOC(ras, sizeof(*ras));
1031 CERROR("Out of Memory: pausing...\n");
1035 ras->ras_sock = NULL;
1038 if (ras->ras_sock == NULL) {
1039 ras->ras_sock = sock_alloc();
1040 if (ras->ras_sock == NULL) {
1041 CERROR("Can't allocate socket: pausing...\n");
1045 /* XXX this should add a ref to sock->ops->owner, if
1046 * TCP could be a module */
1047 ras->ras_sock->type = sock->type;
1048 ras->ras_sock->ops = sock->ops;
1051 set_current_state(TASK_INTERRUPTIBLE);
1053 rc = sock->ops->accept(sock, ras->ras_sock, O_NONBLOCK);
1055 /* Sleep for socket activity? */
1056 if (rc == -EAGAIN &&
1057 kranal_data.kra_listener_shutdown == 0)
1060 set_current_state(TASK_RUNNING);
1063 spin_lock_irqsave(&kranal_data.kra_connd_lock, flags);
1065 list_add_tail(&ras->ras_list,
1066 &kranal_data.kra_connd_acceptq);
1068 spin_unlock_irqrestore(&kranal_data.kra_connd_lock, flags);
1069 wake_up(&kranal_data.kra_connd_waitq);
1075 if (rc != -EAGAIN) {
1076 CERROR("Accept failed: %d, pausing...\n", rc);
1082 if (ras->ras_sock != NULL)
1083 sock_release(ras->ras_sock);
1084 PORTAL_FREE(ras, sizeof(*ras));
1088 remove_wait_queue(sock->sk->sk_sleep, &wait);
1091 kranal_data.kra_listener_sock = NULL;
1093 /* set completion status and unblock thread waiting for me
1094 * (parent on startup failure, executioner on normal shutdown) */
1095 kranal_data.kra_listener_shutdown = rc;
1096 up(&kranal_data.kra_listener_signal);
1102 kranal_start_listener (void)
1107 CDEBUG(D_WARNING, "Starting listener\n");
1109 /* Called holding kra_nid_mutex: listener stopped */
1110 LASSERT (kranal_data.kra_listener_sock == NULL);
1112 kranal_data.kra_listener_shutdown = 0;
1113 pid = kernel_thread(kranal_listener, NULL, 0);
1115 CERROR("Can't spawn listener: %ld\n", pid);
1119 /* Block until listener has started up. */
1120 down(&kranal_data.kra_listener_signal);
1122 rc = kranal_data.kra_listener_shutdown;
1123 LASSERT ((rc != 0) == (kranal_data.kra_listener_sock == NULL));
1125 CDEBUG(D_WARNING, "Listener %ld started OK\n", pid);
1130 kranal_stop_listener(int clear_acceptq)
1132 struct list_head zombie_accepts;
1133 unsigned long flags;
1134 kra_acceptsock_t *ras;
1136 CDEBUG(D_WARNING, "Stopping listener\n");
1138 /* Called holding kra_nid_mutex: listener running */
1139 LASSERT (kranal_data.kra_listener_sock != NULL);
1141 kranal_data.kra_listener_shutdown = 1;
1142 wake_up_all(kranal_data.kra_listener_sock->sk->sk_sleep);
1144 /* Block until listener has torn down. */
1145 down(&kranal_data.kra_listener_signal);
1147 LASSERT (kranal_data.kra_listener_sock == NULL);
1148 CDEBUG(D_WARNING, "Listener stopped\n");
1153 /* Close any unhandled accepts */
1154 spin_lock_irqsave(&kranal_data.kra_connd_lock, flags);
1156 list_add(&zombie_accepts, &kranal_data.kra_connd_acceptq);
1157 list_del_init(&kranal_data.kra_connd_acceptq);
1159 spin_unlock_irqrestore(&kranal_data.kra_connd_lock, flags);
1161 while (!list_empty(&zombie_accepts)) {
1162 ras = list_entry(zombie_accepts.next,
1163 kra_acceptsock_t, ras_list);
1164 list_del(&ras->ras_list);
1165 kranal_free_acceptsock(ras);
1170 kranal_listener_procint(ctl_table *table, int write, struct file *filp,
1171 void *buffer, size_t *lenp)
1173 int *tunable = (int *)table->data;
1177 /* No race with nal initialisation since the nal is setup all the time
1178 * it's loaded. When that changes, change this! */
1179 LASSERT (kranal_data.kra_init == RANAL_INIT_ALL);
1181 down(&kranal_data.kra_nid_mutex);
1183 LASSERT (tunable == &kranal_tunables.kra_port ||
1184 tunable == &kranal_tunables.kra_backlog);
1187 rc = proc_dointvec(table, write, filp, buffer, lenp);
1190 (*tunable != old_val ||
1191 kranal_data.kra_listener_sock == NULL)) {
1193 if (kranal_data.kra_listener_sock != NULL)
1194 kranal_stop_listener(0);
1196 rc = kranal_start_listener();
1199 CWARN("Unable to start listener with new tunable:"
1200 " reverting to old value\n");
1202 kranal_start_listener();
1206 up(&kranal_data.kra_nid_mutex);
1208 LASSERT (kranal_data.kra_init == RANAL_INIT_ALL);
1213 kranal_set_mynid(ptl_nid_t nid)
1215 unsigned long flags;
1216 lib_ni_t *ni = &kranal_lib.libnal_ni;
1219 CDEBUG(D_NET, "setting mynid to "LPX64" (old nid="LPX64")\n",
1220 nid, ni->ni_pid.nid);
1222 down(&kranal_data.kra_nid_mutex);
1224 if (nid == ni->ni_pid.nid) {
1225 /* no change of NID */
1226 up(&kranal_data.kra_nid_mutex);
1230 if (kranal_data.kra_listener_sock != NULL)
1231 kranal_stop_listener(1);
1233 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
1234 kranal_data.kra_peerstamp++;
1235 ni->ni_pid.nid = nid;
1236 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
1238 /* Delete all existing peers and their connections after new
1239 * NID/connstamp set to ensure no old connections in our brave
1241 kranal_del_peer(PTL_NID_ANY, 0);
1243 if (nid != PTL_NID_ANY)
1244 rc = kranal_start_listener();
1246 up(&kranal_data.kra_nid_mutex);
1251 kranal_create_peer (ptl_nid_t nid)
1255 LASSERT (nid != PTL_NID_ANY);
1257 PORTAL_ALLOC(peer, sizeof(*peer));
1261 memset(peer, 0, sizeof(*peer)); /* zero flags etc */
1263 peer->rap_nid = nid;
1264 atomic_set(&peer->rap_refcount, 1); /* 1 ref for caller */
1266 INIT_LIST_HEAD(&peer->rap_list);
1267 INIT_LIST_HEAD(&peer->rap_connd_list);
1268 INIT_LIST_HEAD(&peer->rap_conns);
1269 INIT_LIST_HEAD(&peer->rap_tx_queue);
1271 peer->rap_reconnect_time = CURRENT_SECONDS;
1272 peer->rap_reconnect_interval = RANAL_MIN_RECONNECT_INTERVAL;
1274 atomic_inc(&kranal_data.kra_npeers);
1279 kranal_destroy_peer (kra_peer_t *peer)
1281 CDEBUG(D_NET, "peer "LPX64" %p deleted\n", peer->rap_nid, peer);
1283 LASSERT (atomic_read(&peer->rap_refcount) == 0);
1284 LASSERT (peer->rap_persistence == 0);
1285 LASSERT (!kranal_peer_active(peer));
1286 LASSERT (!peer->rap_connecting);
1287 LASSERT (list_empty(&peer->rap_conns));
1288 LASSERT (list_empty(&peer->rap_tx_queue));
1289 LASSERT (list_empty(&peer->rap_connd_list));
1291 PORTAL_FREE(peer, sizeof(*peer));
1293 /* NB a peer's connections keep a reference on their peer until
1294 * they are destroyed, so we can be assured that _all_ state to do
1295 * with this peer has been cleaned up when its refcount drops to
1297 atomic_dec(&kranal_data.kra_npeers);
1301 kranal_find_peer_locked (ptl_nid_t nid)
1303 struct list_head *peer_list = kranal_nid2peerlist(nid);
1304 struct list_head *tmp;
1307 list_for_each (tmp, peer_list) {
1309 peer = list_entry(tmp, kra_peer_t, rap_list);
1311 LASSERT (peer->rap_persistence > 0 || /* persistent peer */
1312 !list_empty(&peer->rap_conns)); /* active conn */
1314 if (peer->rap_nid != nid)
1317 CDEBUG(D_NET, "got peer [%p] -> "LPX64" (%d)\n",
1318 peer, nid, atomic_read(&peer->rap_refcount));
1325 kranal_find_peer (ptl_nid_t nid)
1329 read_lock(&kranal_data.kra_global_lock);
1330 peer = kranal_find_peer_locked(nid);
1331 if (peer != NULL) /* +1 ref for caller? */
1332 kranal_peer_addref(peer);
1333 read_unlock(&kranal_data.kra_global_lock);
1339 kranal_unlink_peer_locked (kra_peer_t *peer)
1341 LASSERT (peer->rap_persistence == 0);
1342 LASSERT (list_empty(&peer->rap_conns));
1344 LASSERT (kranal_peer_active(peer));
1345 list_del_init(&peer->rap_list);
1347 /* lose peerlist's ref */
1348 kranal_peer_decref(peer);
1352 kranal_get_peer_info (int index, ptl_nid_t *nidp, __u32 *ipp, int *portp,
1356 struct list_head *ptmp;
1359 read_lock(&kranal_data.kra_global_lock);
1361 for (i = 0; i < kranal_data.kra_peer_hash_size; i++) {
1363 list_for_each(ptmp, &kranal_data.kra_peers[i]) {
1365 peer = list_entry(ptmp, kra_peer_t, rap_list);
1366 LASSERT (peer->rap_persistence > 0 ||
1367 !list_empty(&peer->rap_conns));
1372 *nidp = peer->rap_nid;
1373 *ipp = peer->rap_ip;
1374 *portp = peer->rap_port;
1375 *persistencep = peer->rap_persistence;
1377 read_unlock(&kranal_data.kra_global_lock);
1382 read_unlock(&kranal_data.kra_global_lock);
1387 kranal_add_persistent_peer (ptl_nid_t nid, __u32 ip, int port)
1389 unsigned long flags;
1393 if (nid == PTL_NID_ANY)
1396 peer = kranal_create_peer(nid);
1400 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
1402 peer2 = kranal_find_peer_locked(nid);
1403 if (peer2 != NULL) {
1404 kranal_peer_decref(peer);
1407 /* peer table takes existing ref on peer */
1408 list_add_tail(&peer->rap_list,
1409 kranal_nid2peerlist(nid));
1413 peer->rap_port = port;
1414 peer->rap_persistence++;
1416 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
1421 kranal_del_peer_locked (kra_peer_t *peer, int single_share)
1423 struct list_head *ctmp;
1424 struct list_head *cnxt;
1428 peer->rap_persistence = 0;
1429 else if (peer->rap_persistence > 0)
1430 peer->rap_persistence--;
1432 if (peer->rap_persistence != 0)
1435 if (list_empty(&peer->rap_conns)) {
1436 kranal_unlink_peer_locked(peer);
1438 list_for_each_safe(ctmp, cnxt, &peer->rap_conns) {
1439 conn = list_entry(ctmp, kra_conn_t, rac_list);
1441 kranal_close_conn_locked(conn, 0);
1443 /* peer unlinks itself when last conn is closed */
1448 kranal_del_peer (ptl_nid_t nid, int single_share)
1450 unsigned long flags;
1451 struct list_head *ptmp;
1452 struct list_head *pnxt;
1459 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
1461 if (nid != PTL_NID_ANY)
1462 lo = hi = kranal_nid2peerlist(nid) - kranal_data.kra_peers;
1465 hi = kranal_data.kra_peer_hash_size - 1;
1468 for (i = lo; i <= hi; i++) {
1469 list_for_each_safe (ptmp, pnxt, &kranal_data.kra_peers[i]) {
1470 peer = list_entry(ptmp, kra_peer_t, rap_list);
1471 LASSERT (peer->rap_persistence > 0 ||
1472 !list_empty(&peer->rap_conns));
1474 if (!(nid == PTL_NID_ANY || peer->rap_nid == nid))
1477 kranal_del_peer_locked(peer, single_share);
1478 rc = 0; /* matched something */
1485 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
1491 kranal_get_conn_by_idx (int index)
1494 struct list_head *ptmp;
1496 struct list_head *ctmp;
1499 read_lock (&kranal_data.kra_global_lock);
1501 for (i = 0; i < kranal_data.kra_peer_hash_size; i++) {
1502 list_for_each (ptmp, &kranal_data.kra_peers[i]) {
1504 peer = list_entry(ptmp, kra_peer_t, rap_list);
1505 LASSERT (peer->rap_persistence > 0 ||
1506 !list_empty(&peer->rap_conns));
1508 list_for_each (ctmp, &peer->rap_conns) {
1512 conn = list_entry(ctmp, kra_conn_t, rac_list);
1513 CDEBUG(D_NET, "++conn[%p] -> "LPX64" (%d)\n",
1514 conn, conn->rac_peer->rap_nid,
1515 atomic_read(&conn->rac_refcount));
1516 atomic_inc(&conn->rac_refcount);
1517 read_unlock(&kranal_data.kra_global_lock);
1523 read_unlock(&kranal_data.kra_global_lock);
1528 kranal_close_peer_conns_locked (kra_peer_t *peer, int why)
1531 struct list_head *ctmp;
1532 struct list_head *cnxt;
1535 list_for_each_safe (ctmp, cnxt, &peer->rap_conns) {
1536 conn = list_entry(ctmp, kra_conn_t, rac_list);
1539 kranal_close_conn_locked(conn, why);
1546 kranal_close_matching_conns (ptl_nid_t nid)
1548 unsigned long flags;
1550 struct list_head *ptmp;
1551 struct list_head *pnxt;
1557 write_lock_irqsave(&kranal_data.kra_global_lock, flags);
1559 if (nid != PTL_NID_ANY)
1560 lo = hi = kranal_nid2peerlist(nid) - kranal_data.kra_peers;
1563 hi = kranal_data.kra_peer_hash_size - 1;
1566 for (i = lo; i <= hi; i++) {
1567 list_for_each_safe (ptmp, pnxt, &kranal_data.kra_peers[i]) {
1569 peer = list_entry(ptmp, kra_peer_t, rap_list);
1570 LASSERT (peer->rap_persistence > 0 ||
1571 !list_empty(&peer->rap_conns));
1573 if (!(nid == PTL_NID_ANY || nid == peer->rap_nid))
1576 count += kranal_close_peer_conns_locked(peer, 0);
1580 write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
1582 /* wildcards always succeed */
1583 if (nid == PTL_NID_ANY)
1586 return (count == 0) ? -ENOENT : 0;
1590 kranal_cmd(struct portals_cfg *pcfg, void * private)
1594 LASSERT (pcfg != NULL);
1596 switch(pcfg->pcfg_command) {
1597 case NAL_CMD_GET_PEER: {
1601 int share_count = 0;
1603 rc = kranal_get_peer_info(pcfg->pcfg_count,
1604 &nid, &ip, &port, &share_count);
1605 pcfg->pcfg_nid = nid;
1606 pcfg->pcfg_size = 0;
1608 pcfg->pcfg_misc = port;
1609 pcfg->pcfg_count = 0;
1610 pcfg->pcfg_wait = share_count;
1613 case NAL_CMD_ADD_PEER: {
1614 rc = kranal_add_persistent_peer(pcfg->pcfg_nid,
1615 pcfg->pcfg_id, /* IP */
1616 pcfg->pcfg_misc); /* port */
1619 case NAL_CMD_DEL_PEER: {
1620 rc = kranal_del_peer(pcfg->pcfg_nid,
1621 /* flags == single_share */
1622 pcfg->pcfg_flags != 0);
1625 case NAL_CMD_GET_CONN: {
1626 kra_conn_t *conn = kranal_get_conn_by_idx(pcfg->pcfg_count);
1632 pcfg->pcfg_nid = conn->rac_peer->rap_nid;
1633 pcfg->pcfg_id = conn->rac_device->rad_id;
1634 pcfg->pcfg_misc = 0;
1635 pcfg->pcfg_flags = 0;
1636 kranal_conn_decref(conn);
1640 case NAL_CMD_CLOSE_CONNECTION: {
1641 rc = kranal_close_matching_conns(pcfg->pcfg_nid);
1644 case NAL_CMD_REGISTER_MYNID: {
1645 if (pcfg->pcfg_nid == PTL_NID_ANY)
1648 rc = kranal_set_mynid(pcfg->pcfg_nid);
1657 kranal_free_txdescs(struct list_head *freelist)
1661 while (!list_empty(freelist)) {
1662 tx = list_entry(freelist->next, kra_tx_t, tx_list);
1664 list_del(&tx->tx_list);
1665 PORTAL_FREE(tx->tx_phys, PTL_MD_MAX_IOV * sizeof(*tx->tx_phys));
1666 PORTAL_FREE(tx, sizeof(*tx));
1671 kranal_alloc_txdescs(struct list_head *freelist, int n)
1673 int isnblk = (freelist == &kranal_data.kra_idle_nblk_txs);
1677 LASSERT (freelist == &kranal_data.kra_idle_txs ||
1678 freelist == &kranal_data.kra_idle_nblk_txs);
1679 LASSERT (list_empty(freelist));
1681 for (i = 0; i < n; i++) {
1683 PORTAL_ALLOC(tx, sizeof(*tx));
1685 CERROR("Can't allocate %stx[%d]\n",
1686 isnblk ? "nblk " : "", i);
1687 kranal_free_txdescs(freelist);
1691 PORTAL_ALLOC(tx->tx_phys,
1692 PTL_MD_MAX_IOV * sizeof(*tx->tx_phys));
1693 if (tx->tx_phys == NULL) {
1694 CERROR("Can't allocate %stx[%d]->tx_phys\n",
1695 isnblk ? "nblk " : "", i);
1697 PORTAL_FREE(tx, sizeof(*tx));
1698 kranal_free_txdescs(freelist);
1702 tx->tx_isnblk = isnblk;
1703 tx->tx_buftype = RANAL_BUF_NONE;
1704 tx->tx_msg.ram_type = RANAL_MSG_NONE;
1706 list_add(&tx->tx_list, freelist);
1713 kranal_device_init(int id, kra_device_t *dev)
1715 const int total_ntx = RANAL_NTX + RANAL_NTX_NBLK;
1719 rrc = RapkGetDeviceByIndex(id, kranal_device_callback,
1721 if (rrc != RAP_SUCCESS) {
1722 CERROR("Can't get Rapidarray Device %d: %d\n", id, rrc);
1726 rrc = RapkReserveRdma(dev->rad_handle, total_ntx);
1727 if (rrc != RAP_SUCCESS) {
1728 CERROR("Can't reserve %d RDMA descriptors"
1729 " for device %d: %d\n", total_ntx, id, rrc);
1733 rrc = RapkCreateCQ(dev->rad_handle, total_ntx, RAP_CQTYPE_SEND,
1734 &dev->rad_rdma_cqh);
1735 if (rrc != RAP_SUCCESS) {
1736 CERROR("Can't create rdma cq size %d"
1737 " for device %d: %d\n", total_ntx, id, rrc);
1741 rrc = RapkCreateCQ(dev->rad_handle, RANAL_FMA_CQ_SIZE, RAP_CQTYPE_RECV,
1743 if (rrc != RAP_SUCCESS) {
1744 CERROR("Can't create fma cq size %d"
1745 " for device %d: %d\n", RANAL_FMA_CQ_SIZE, id, rrc);
1752 RapkDestroyCQ(dev->rad_handle, dev->rad_rdma_cqh);
1754 RapkReleaseDevice(dev->rad_handle);
1760 kranal_device_fini(kra_device_t *dev)
1762 LASSERT(dev->rad_scheduler == NULL);
1763 RapkDestroyCQ(dev->rad_handle, dev->rad_fma_cqh);
1764 RapkDestroyCQ(dev->rad_handle, dev->rad_rdma_cqh);
1765 RapkReleaseDevice(dev->rad_handle);
1769 kranal_api_shutdown (nal_t *nal)
1772 unsigned long flags;
1774 if (nal->nal_refct != 0) {
1775 /* This module got the first ref */
1776 PORTAL_MODULE_UNUSE;
1780 CDEBUG(D_MALLOC, "before NAL cleanup: kmem %d\n",
1781 atomic_read(&portal_kmemory));
1783 LASSERT (nal == &kranal_api);
1785 switch (kranal_data.kra_init) {
1787 CERROR("Unexpected state %d\n", kranal_data.kra_init);
1790 case RANAL_INIT_ALL:
1791 /* stop calls to nal_cmd */
1792 libcfs_nal_cmd_unregister(RANAL);
1793 /* No new persistent peers */
1795 /* resetting my NID to unadvertises me, removes my
1796 * listener and nukes all current peers */
1797 kranal_set_mynid(PTL_NID_ANY);
1798 /* no new peers or conns */
1800 /* Wait for all peer/conn state to clean up */
1802 while (atomic_read(&kranal_data.kra_nconns) != 0 ||
1803 atomic_read(&kranal_data.kra_npeers) != 0) {
1805 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* power of 2? */
1806 "waiting for %d peers and %d conns to close down\n",
1807 atomic_read(&kranal_data.kra_npeers),
1808 atomic_read(&kranal_data.kra_nconns));
1813 case RANAL_INIT_LIB:
1814 lib_fini(&kranal_lib);
1817 case RANAL_INIT_DATA:
1821 /* flag threads to terminate; wake and wait for them to die */
1822 kranal_data.kra_shutdown = 1;
1824 for (i = 0; i < kranal_data.kra_ndevs; i++) {
1825 kra_device_t *dev = &kranal_data.kra_devices[i];
1827 LASSERT (list_empty(&dev->rad_connq));
1829 spin_lock_irqsave(&dev->rad_lock, flags);
1830 wake_up(&dev->rad_waitq);
1831 spin_unlock_irqrestore(&dev->rad_lock, flags);
1834 spin_lock_irqsave(&kranal_data.kra_reaper_lock, flags);
1835 wake_up_all(&kranal_data.kra_reaper_waitq);
1836 spin_unlock_irqrestore(&kranal_data.kra_reaper_lock, flags);
1838 LASSERT (list_empty(&kranal_data.kra_connd_peers));
1839 spin_lock_irqsave(&kranal_data.kra_connd_lock, flags);
1840 wake_up_all(&kranal_data.kra_connd_waitq);
1841 spin_unlock_irqrestore(&kranal_data.kra_connd_lock, flags);
1844 while (atomic_read(&kranal_data.kra_nthreads) != 0) {
1846 CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* power of 2? */
1847 "Waiting for %d threads to terminate\n",
1848 atomic_read(&kranal_data.kra_nthreads));
1852 LASSERT (atomic_read(&kranal_data.kra_npeers) == 0);
1853 if (kranal_data.kra_peers != NULL) {
1854 for (i = 0; i < kranal_data.kra_peer_hash_size; i++)
1855 LASSERT (list_empty(&kranal_data.kra_peers[i]));
1857 PORTAL_FREE(kranal_data.kra_peers,
1858 sizeof (struct list_head) *
1859 kranal_data.kra_peer_hash_size);
1862 LASSERT (atomic_read(&kranal_data.kra_nconns) == 0);
1863 if (kranal_data.kra_conns != NULL) {
1864 for (i = 0; i < kranal_data.kra_conn_hash_size; i++)
1865 LASSERT (list_empty(&kranal_data.kra_conns[i]));
1867 PORTAL_FREE(kranal_data.kra_conns,
1868 sizeof (struct list_head) *
1869 kranal_data.kra_conn_hash_size);
1872 for (i = 0; i < kranal_data.kra_ndevs; i++)
1873 kranal_device_fini(&kranal_data.kra_devices[i]);
1875 kranal_free_txdescs(&kranal_data.kra_idle_txs);
1876 kranal_free_txdescs(&kranal_data.kra_idle_nblk_txs);
1878 CDEBUG(D_MALLOC, "after NAL cleanup: kmem %d\n",
1879 atomic_read(&portal_kmemory));
1880 printk(KERN_INFO "Lustre: RapidArray NAL unloaded (final mem %d)\n",
1881 atomic_read(&portal_kmemory));
1883 kranal_data.kra_init = RANAL_INIT_NOTHING;
1887 kranal_api_startup (nal_t *nal, ptl_pid_t requested_pid,
1888 ptl_ni_limits_t *requested_limits,
1889 ptl_ni_limits_t *actual_limits)
1891 static int device_ids[] = {RAPK_MAIN_DEVICE_ID,
1892 RAPK_EXPANSION_DEVICE_ID};
1894 ptl_process_id_t process_id;
1895 int pkmem = atomic_read(&portal_kmemory);
1900 LASSERT (nal == &kranal_api);
1902 if (nal->nal_refct != 0) {
1903 if (actual_limits != NULL)
1904 *actual_limits = kranal_lib.libnal_ni.ni_actual_limits;
1905 /* This module got the first ref */
1910 LASSERT (kranal_data.kra_init == RANAL_INIT_NOTHING);
1912 memset(&kranal_data, 0, sizeof(kranal_data)); /* zero pointers, flags etc */
1914 /* CAVEAT EMPTOR: Every 'Fma' message includes the sender's NID and
1915 * a unique (for all time) connstamp so we can uniquely identify
1916 * the sender. The connstamp is an incrementing counter
1917 * initialised with seconds + microseconds at startup time. So we
1918 * rely on NOT creating connections more frequently on average than
1919 * 1MHz to ensure we don't use old connstamps when we reboot. */
1920 do_gettimeofday(&tv);
1921 kranal_data.kra_connstamp =
1922 kranal_data.kra_peerstamp = (((__u64)tv.tv_sec) * 1000000) + tv.tv_usec;
1924 init_MUTEX(&kranal_data.kra_nid_mutex);
1925 init_MUTEX_LOCKED(&kranal_data.kra_listener_signal);
1927 rwlock_init(&kranal_data.kra_global_lock);
1929 for (i = 0; i < RANAL_MAXDEVS; i++ ) {
1930 kra_device_t *dev = &kranal_data.kra_devices[i];
1933 INIT_LIST_HEAD(&dev->rad_connq);
1934 init_waitqueue_head(&dev->rad_waitq);
1935 spin_lock_init(&dev->rad_lock);
1938 kranal_data.kra_new_min_timeout = MAX_SCHEDULE_TIMEOUT;
1939 init_waitqueue_head(&kranal_data.kra_reaper_waitq);
1940 spin_lock_init(&kranal_data.kra_reaper_lock);
1942 INIT_LIST_HEAD(&kranal_data.kra_connd_peers);
1943 init_waitqueue_head(&kranal_data.kra_connd_waitq);
1944 spin_lock_init(&kranal_data.kra_connd_lock);
1946 INIT_LIST_HEAD(&kranal_data.kra_idle_txs);
1947 INIT_LIST_HEAD(&kranal_data.kra_idle_nblk_txs);
1948 init_waitqueue_head(&kranal_data.kra_idle_tx_waitq);
1949 spin_lock_init(&kranal_data.kra_tx_lock);
1951 /* OK to call kranal_api_shutdown() to cleanup now */
1952 kranal_data.kra_init = RANAL_INIT_DATA;
1954 kranal_data.kra_peer_hash_size = RANAL_PEER_HASH_SIZE;
1955 PORTAL_ALLOC(kranal_data.kra_peers,
1956 sizeof(struct list_head) * kranal_data.kra_peer_hash_size);
1957 if (kranal_data.kra_peers == NULL)
1960 for (i = 0; i < kranal_data.kra_peer_hash_size; i++)
1961 INIT_LIST_HEAD(&kranal_data.kra_peers[i]);
1963 kranal_data.kra_conn_hash_size = RANAL_PEER_HASH_SIZE;
1964 PORTAL_ALLOC(kranal_data.kra_conns,
1965 sizeof(struct list_head) * kranal_data.kra_conn_hash_size);
1966 if (kranal_data.kra_conns == NULL)
1969 for (i = 0; i < kranal_data.kra_conn_hash_size; i++)
1970 INIT_LIST_HEAD(&kranal_data.kra_conns[i]);
1972 rc = kranal_alloc_txdescs(&kranal_data.kra_idle_txs, RANAL_NTX);
1976 rc = kranal_alloc_txdescs(&kranal_data.kra_idle_nblk_txs,RANAL_NTX_NBLK);
1980 process_id.pid = requested_pid;
1981 process_id.nid = PTL_NID_ANY; /* don't know my NID yet */
1983 rc = lib_init(&kranal_lib, nal, process_id,
1984 requested_limits, actual_limits);
1986 CERROR("lib_init failed: error %d\n", rc);
1990 /* lib interface initialised */
1991 kranal_data.kra_init = RANAL_INIT_LIB;
1992 /*****************************************************/
1994 rc = kranal_thread_start(kranal_reaper, NULL);
1996 CERROR("Can't spawn ranal reaper: %d\n", rc);
2000 for (i = 0; i < RANAL_N_CONND; i++) {
2001 rc = kranal_thread_start(kranal_connd, (void *)(unsigned long)i);
2003 CERROR("Can't spawn ranal connd[%d]: %d\n",
2009 LASSERT(kranal_data.kra_ndevs == 0);
2010 for (i = 0; i < sizeof(device_ids)/sizeof(device_ids[0]); i++) {
2011 dev = &kranal_data.kra_devices[kranal_data.kra_ndevs];
2013 rc = kranal_device_init(device_ids[i], dev);
2015 kranal_data.kra_ndevs++;
2017 rc = kranal_thread_start(kranal_scheduler, dev);
2019 CERROR("Can't spawn ranal scheduler[%d]: %d\n",
2025 if (kranal_data.kra_ndevs == 0)
2028 rc = libcfs_nal_cmd_register(RANAL, &kranal_cmd, NULL);
2030 CERROR("Can't initialise command interface (rc = %d)\n", rc);
2034 /* flag everything initialised */
2035 kranal_data.kra_init = RANAL_INIT_ALL;
2036 /*****************************************************/
2038 CDEBUG(D_MALLOC, "initial kmem %d\n", atomic_read(&portal_kmemory));
2039 printk(KERN_INFO "Lustre: RapidArray NAL loaded "
2040 "(initial mem %d)\n", pkmem);
2045 kranal_api_shutdown(&kranal_api);
2050 kranal_module_fini (void)
2052 if (kranal_tunables.kra_sysctl != NULL)
2053 unregister_sysctl_table(kranal_tunables.kra_sysctl);
2055 PtlNIFini(kranal_ni);
2057 ptl_unregister_nal(RANAL);
2061 kranal_module_init (void)
2065 /* the following must be sizeof(int) for
2066 * proc_dointvec/kranal_listener_procint() */
2067 LASSERT (sizeof(kranal_tunables.kra_timeout) == sizeof(int));
2068 LASSERT (sizeof(kranal_tunables.kra_listener_timeout) == sizeof(int));
2069 LASSERT (sizeof(kranal_tunables.kra_backlog) == sizeof(int));
2070 LASSERT (sizeof(kranal_tunables.kra_port) == sizeof(int));
2071 LASSERT (sizeof(kranal_tunables.kra_max_immediate) == sizeof(int));
2073 kranal_api.nal_ni_init = kranal_api_startup;
2074 kranal_api.nal_ni_fini = kranal_api_shutdown;
2076 /* Initialise dynamic tunables to defaults once only */
2077 kranal_tunables.kra_timeout = RANAL_TIMEOUT;
2078 kranal_tunables.kra_listener_timeout = RANAL_LISTENER_TIMEOUT;
2079 kranal_tunables.kra_backlog = RANAL_BACKLOG;
2080 kranal_tunables.kra_port = RANAL_PORT;
2081 kranal_tunables.kra_max_immediate = RANAL_MAX_IMMEDIATE;
2083 rc = ptl_register_nal(RANAL, &kranal_api);
2085 CERROR("Can't register RANAL: %d\n", rc);
2086 return -ENOMEM; /* or something... */
2089 /* Pure gateways want the NAL started up at module load time... */
2090 rc = PtlNIInit(RANAL, LUSTRE_SRV_PTL_PID, NULL, NULL, &kranal_ni);
2091 if (rc != PTL_OK && rc != PTL_IFACE_DUP) {
2092 ptl_unregister_nal(RANAL);
2096 kranal_tunables.kra_sysctl =
2097 register_sysctl_table(kranal_top_ctl_table, 0);
2098 if (kranal_tunables.kra_sysctl == NULL) {
2099 CERROR("Can't register sysctl table\n");
2100 PtlNIFini(kranal_ni);
2101 ptl_unregister_nal(RANAL);
2108 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
2109 MODULE_DESCRIPTION("Kernel RapidArray NAL v0.01");
2110 MODULE_LICENSE("GPL");
2112 module_init(kranal_module_init);
2113 module_exit(kranal_module_fini);