2 * Copyright (C) 2012 Cray, Inc.
4 * Author: Nic Henke <nic@cray.com>
6 * This file is part of Lustre, http://www.lustre.org.
8 * Lustre is free software; you can redistribute it and/or
9 * modify it under the terms of version 2 of the GNU General Public
10 * License as published by the Free Software Foundation.
12 * Lustre is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Lustre; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 #if defined(GNILND_USE_RCA)
24 #include <rsms/rs_sm_states.h>
26 /* Advance all timeouts by nap_time seconds. */
28 kgnilnd_bump_timeouts(__u32 nap_time, char *reason)
37 LCONSOLE_INFO("%s: bumping all timeouts by %ds\n", reason, nap_time);
39 LASSERTF(GNILND_IS_QUIESCED, "gnilnd not quiesced %d != %d\n",
40 atomic_read(&kgnilnd_data.kgn_nquiesce),
41 atomic_read(&kgnilnd_data.kgn_nthreads));
43 /* requiring that the threads are paused ensures a couple of things:
44 * - combined code paths for stack reset and quiesce event as stack reset
45 * runs with the threads paused
46 * - prevents traffic to the Gemini during a quiesce period
47 * - reduces the locking requirements
50 for (i = 0; i < *kgnilnd_tunables.kgn_peer_hash_size; i++) {
51 list_for_each_entry(peer, &kgnilnd_data.kgn_peers[i], gnp_list) {
53 /* we can reconnect again at any time */
54 peer->gnp_reconnect_time = jiffies;
55 /* reset now that network is healthy */
56 peer->gnp_reconnect_interval = 0;
57 /* tell LNet dude is still alive */
58 kgnilnd_peer_alive(peer);
60 list_for_each_entry(tx, &peer->gnp_tx_queue, tx_list) {
61 tx->tx_qtime = jiffies;
64 list_for_each_entry(conn, &peer->gnp_conns, gnc_list) {
65 unsigned long timeout;
67 timeout = cfs_time_seconds(conn->gnc_timeout);
69 /* bump last_rx/last_rx_cq on all conns - including
70 * closed ones, this will have the effect of
71 * bumping the purgatory timers for those */
72 conn->gnc_last_rx = conn->gnc_last_rx_cq = jiffies;
74 /* we don't timeout based on old gnc_last_tx, so
75 * we'll back it up and schedule the conn to trigger
77 conn->gnc_last_tx = jiffies - timeout;
78 if (conn->gnc_state != GNILND_CONN_DONE)
79 kgnilnd_schedule_conn(conn);
84 for (i = 0; i < kgnilnd_data.kgn_ndevs; i++) {
85 dev = &kgnilnd_data.kgn_devices[i];
86 for (i = 0; i < (*kgnilnd_tunables.kgn_peer_hash_size - 1); i++) {
87 list_for_each_entry(dgram, &dev->gnd_dgrams[i], gndg_list) {
88 dgram->gndg_post_time = jiffies;
94 /* Quiesce or wake up the stack. The caller must hold the kgn_quiesce_sem semaphore
95 * on entry, which holds off any pending stack shutdown. */
97 kgnilnd_quiesce_wait(char *reason)
101 if (kgnilnd_data.kgn_quiesce_trigger) {
102 unsigned long quiesce_deadline, quiesce_to;
105 /* morning sunshine */
106 spin_lock(&kgnilnd_data.kgn_reaper_lock);
107 wake_up_all(&kgnilnd_data.kgn_reaper_waitq);
108 spin_unlock(&kgnilnd_data.kgn_reaper_lock);
110 for (i = 0; i < kgnilnd_data.kgn_ndevs; i++) {
111 kgn_device_t *dev = &kgnilnd_data.kgn_devices[i];
113 wake_up_all(&dev->gnd_waitq);
114 wake_up_all(&dev->gnd_dgram_waitq);
115 wake_up_all(&dev->gnd_dgping_waitq);
118 kgnilnd_wakeup_rca_thread();
120 /* we'll wait for 10x the timeout for the threads to pause */
121 quiesce_to = cfs_time_seconds(*kgnilnd_tunables.kgn_timeout * 10);
122 quiesce_deadline = (long) jiffies + quiesce_to;
124 /* wait for everyone to check-in as quiesced */
126 while (!GNILND_IS_QUIESCED) {
128 LCONSOLE((((i) & (-i)) == i) ? D_WARNING : D_NET,
129 "%s: Waiting for %d threads to pause\n",
131 atomic_read(&kgnilnd_data.kgn_nthreads) -
132 atomic_read(&kgnilnd_data.kgn_nquiesce));
133 CFS_RACE(CFS_FAIL_GNI_QUIESCE_RACE);
134 cfs_pause(cfs_time_seconds(1 * i));
136 LASSERTF(quiesce_deadline > jiffies,
137 "couldn't quiesce threads in %lu seconds, falling over now\n",
138 cfs_duration_sec(quiesce_to));
141 LCONSOLE_WARN("%s: All threads paused!\n", reason);
142 /* XXX Nic: Is there a set of counters we can grab here to
143 * ensure that there is no traffic until quiesce is over ?*/
147 for (i = 0; i < kgnilnd_data.kgn_ndevs; i++) {
148 kgn_device_t *dev = &kgnilnd_data.kgn_devices[i];
149 kgnilnd_schedule_dgram(dev);
152 /* wait for everyone to check-in as running - they will be spinning
153 * and looking, so no need to poke any waitq */
155 while (atomic_read(&kgnilnd_data.kgn_nquiesce) > 0) {
157 LCONSOLE((((i) & (-i)) == i) ? D_WARNING : D_NET,
158 "%s: Waiting for %d threads to wake up\n",
160 atomic_read(&kgnilnd_data.kgn_nquiesce));
161 cfs_pause(cfs_time_seconds(1 * i));
164 LCONSOLE_WARN("%s: All threads awake!\n", reason);
168 /* Reset the stack. */
170 kgnilnd_reset_stack(void)
174 kgn_peer_t *peer, *peerN;
176 char *reason = "critical hardware error";
178 unsigned long start, end;
181 /* Race with del_peer and its atomics */
182 CFS_RACE(CFS_FAIL_GNI_RACE_RESET);
184 if (kgnilnd_data.kgn_init != GNILND_INIT_ALL) {
185 CERROR("can't reset the stack, gnilnd is not initialized\n");
189 /* First make sure we are not already quiesced - we panic if so,
190 * as that could leave software in a bad state */
191 LASSERTF(kgnilnd_data.kgn_quiesce_trigger == GNILND_QUIESCE_IDLE,
192 "can't reset the stack, already doing so: trigger %d\n",
193 kgnilnd_data.kgn_quiesce_trigger);
195 set_mb(kgnilnd_data.kgn_quiesce_trigger, GNILND_QUIESCE_RESET);
197 /* wake up the dgram waitq thread - but after trigger set to make sure it
198 * goes into quiesce */
199 CFS_RACE(CFS_FAIL_GNI_WC_DGRAM_FREE);
200 /* same for scheduler that is dropping state transitiosn */
201 CFS_RACE(CFS_FAIL_GNI_DROP_CLOSING);
202 CFS_RACE(CFS_FAIL_GNI_DROP_DESTROY_EP);
204 kgnilnd_quiesce_wait(reason);
208 kgnilnd_data.kgn_in_reset = 1;
209 kgnilnd_data.kgn_nresets++;
210 LCONSOLE_WARN("%s: resetting all resources (count %d)\n",
211 reason, kgnilnd_data.kgn_nresets);
213 for (i = 0; i < *kgnilnd_tunables.kgn_net_hash_size; i++) {
214 list_for_each_entry(net, &kgnilnd_data.kgn_nets[i], gnn_list) {
215 rc = kgnilnd_cancel_net_dgrams(net);
216 LASSERTF(rc == 0, "couldn't cleanup datagrams: %d\n", rc);
220 /* error -ENOTRECOVERABLE is stack reset */
221 kgnilnd_del_conn_or_peer(NULL, LNET_NID_ANY, GNILND_DEL_CONN, -ENOTRECOVERABLE);
223 for (i = 0; i < kgnilnd_data.kgn_ndevs; i++) {
224 kgn_device_t *dev = &kgnilnd_data.kgn_devices[i];
225 kgnilnd_cancel_wc_dgrams(dev);
226 kgnilnd_wait_for_canceled_dgrams(dev);
229 /* manually do some conn processing ala kgnilnd_process_conns */
230 for (i = 0; i < kgnilnd_data.kgn_ndevs; i++) {
231 kgn_device_t *dev = &kgnilnd_data.kgn_devices[i];
235 /* go find all the closed conns that need to be nuked - the
236 * scheduler thread isn't running to do this for us */
238 CDEBUG(D_NET, "will try to clear up %d ready_conns\n",
239 kgnilnd_count_list(&dev->gnd_ready_conns));
241 /* use while/list_first_entry loop to ensure we can handle any
242 * DESTROY_EP conns added from kgnilnd_complete_closed_conn */
243 while (!list_empty(&dev->gnd_ready_conns)) {
244 conn = list_first_entry(&dev->gnd_ready_conns,
245 kgn_conn_t, gnc_schedlist);
246 conn_sched = xchg(&conn->gnc_scheduled, GNILND_CONN_PROCESS);
248 LASSERTF(conn_sched != GNILND_CONN_IDLE &&
249 conn_sched != GNILND_CONN_PROCESS,
250 "conn %p on ready list but in bad state: %d\n",
253 list_del_init(&conn->gnc_schedlist);
255 if (conn->gnc_state == GNILND_CONN_CLOSING) {
256 /* bump to CLOSED to fake out send of CLOSE */
257 conn->gnc_state = GNILND_CONN_CLOSED;
258 conn->gnc_close_sent = 1;
261 if (conn->gnc_state == GNILND_CONN_DESTROY_EP) {
262 kgnilnd_destroy_conn_ep(conn);
264 kgnilnd_complete_closed_conn(conn);
267 /* there really shouldn't be any other states here -
268 * they would have been cleared out in the del_peer_or_conn or the dgram
270 * there is an LASSERTF in kgnilnd_complete_closed_conn that will take
271 * care of catching anything else for us */
273 kgnilnd_schedule_process_conn(conn, -1);
275 kgnilnd_conn_decref(conn);
279 /* don't let the little weasily purgatory conns hide from us */
280 for (i = 0; i < *kgnilnd_tunables.kgn_peer_hash_size; i++) {
281 list_for_each_entry_safe(peer, peerN, &kgnilnd_data.kgn_peers[i], gnp_list) {
282 kgn_conn_t *conn, *connN;
284 list_for_each_entry_safe(conn, connN, &peer->gnp_conns, gnc_list) {
285 kgnilnd_detach_purgatory_locked(conn, &souls);
290 CDEBUG(D_NET, "about to release %d purgatory entries\n",
291 kgnilnd_count_list(&souls));
293 kgnilnd_release_purgatory_list(&souls);
295 /* validate we are now clean */
296 for (i = 0; i < kgnilnd_data.kgn_ndevs; i++) {
297 kgn_device_t *dev = &kgnilnd_data.kgn_devices[i];
299 /* now all the cons/mboxes should be cleaned up, including purgatory
300 * so go through and release the MDDs for our persistent PHYS fma_blks
302 kgnilnd_unmap_fma_blocks(dev);
304 LASSERTF(atomic_read(&dev->gnd_nfmablk) == 0,
305 "reset failed: fma blocks still live %d\n",
306 atomic_read(&dev->gnd_nfmablk));
308 LASSERTF(atomic_read(&dev->gnd_neps) == 0,
309 "reset failed: EP handles still live %d\n",
310 atomic_read(&dev->gnd_neps));
313 LASSERTF(atomic_read(&kgnilnd_data.kgn_nconns) == 0,
314 "reset failed: conns left %d\n",
315 atomic_read(&kgnilnd_data.kgn_nconns));
317 /* fine to have peers left - they are waiting for new conns
318 * but should not be holding any open HW resources */
320 /* like the last part of kgnilnd_base_shutdown() */
322 CFS_RACE(CFS_FAIL_GNI_SR_DOWN_RACE);
324 for (i = 0; i < kgnilnd_data.kgn_ndevs; i++) {
325 kgnilnd_dev_fini(&kgnilnd_data.kgn_devices[i]);
328 /* no need to free and recreate the TX descriptors
329 * we nuked all the ones that could be using HW resources in
330 * kgnilnd_close_matching_conns and asserted it worked in
331 * kgnilnd_dev_fini */
333 /* At this point, all HW is torn down, start to reset */
335 /* only reset our known devs */
336 for (i = 0; i < kgnilnd_data.kgn_ndevs; i++) {
337 kgn_device_t *dev = &kgnilnd_data.kgn_devices[i];
338 rc = kgnilnd_dev_init(dev);
339 LASSERTF(rc == 0, "dev_init failed for dev %d\n", i);
340 kgnilnd_map_phys_fmablk(dev);
341 LASSERTF(rc == 0, "map_phys_fmablk failed for dev %d\n", i);
342 rc = kgnilnd_setup_wildcard_dgram(dev);
343 LASSERTF(rc == 0, "couldnt setup datagrams on dev %d: %d\n",
347 /* Now the fun restarts... - release the hounds! */
350 seconds = cfs_duration_sec((long)end - start);
351 kgnilnd_bump_timeouts(seconds, reason);
353 kgnilnd_data.kgn_in_reset = 0;
354 set_mb(kgnilnd_data.kgn_quiesce_trigger, GNILND_QUIESCE_IDLE);
355 kgnilnd_quiesce_wait(reason);
356 LCONSOLE_WARN("%s reset of all hardware resources\n",
357 rc ? "failed" : "successful");
362 /* A thread that handles quiece and reset hardware events.
363 * We do the same thing regardless of which device reported the event. */
365 kgnilnd_ruhroh_thread(void *arg)
371 set_user_nice(current, *kgnilnd_tunables.kgn_nice);
372 kgnilnd_data.kgn_ruhroh_running = 1;
376 /* Block until there's a request.. A reset request could come in
377 * while we're handling a quiesce one, or vice versa.
378 * Keep processing requests until there are none.*/
379 prepare_to_wait(&kgnilnd_data.kgn_ruhroh_waitq, &wait, TASK_INTERRUPTIBLE);
380 while (!(kgnilnd_data.kgn_ruhroh_shutdown ||
381 kgnilnd_data.kgn_needs_reset || kgnilnd_data.kgn_needs_pause))
383 finish_wait(&kgnilnd_data.kgn_ruhroh_waitq, &wait);
385 /* Exit if the driver is shutting down. */
386 if (kgnilnd_data.kgn_ruhroh_shutdown)
389 /* Serialize with driver startup and shutdown. */
390 mutex_lock(&kgnilnd_data.kgn_quiesce_mutex);
392 CDEBUG(D_NET, "trigger %d reset %d to_bump %d pause %d\n",
393 kgnilnd_data.kgn_quiesce_trigger,
394 kgnilnd_data.kgn_needs_reset,
395 kgnilnd_data.kgn_bump_info_rdy,
396 kgnilnd_data.kgn_needs_pause);
398 /* Do we need to do a pause/quiesce? */
399 if (kgnilnd_data.kgn_needs_pause) {
401 /* Pause all other kgnilnd threads. */
402 set_mb(kgnilnd_data.kgn_quiesce_trigger, GNILND_QUIESCE_HW_QUIESCE);
403 kgnilnd_quiesce_wait("hardware quiesce flag");
405 /* If the hardware quiesce flag is set, wait for it to clear.
406 * This should happen relatively quickly, so we wait for it.
407 * This will hold up the eventd thread, but on everything but
408 * the simulator, this is ok-- there is one thread per core.
410 * Handle (possibly multiple) quiesce events while we wait. The
411 * memory barrier ensures that the core doesn't start fetching
412 * kgn_bump_info_rdy before it fetches kgn_needs_pause, and
413 * matches the second mb in kgnilnd_quiesce_end_callback(). */
415 while (kgnilnd_hw_in_quiesce() || kgnilnd_data.kgn_bump_info_rdy) {
418 LCONSOLE((((i) & (-i)) == i) ? D_WARNING : D_NET,
419 "Waiting for hardware quiesce flag to clear\n");
420 cfs_pause(cfs_time_seconds(1 * i));
422 /* If we got a quiesce event with bump info, DO THE BUMP!. */
423 if (kgnilnd_data.kgn_bump_info_rdy) {
424 /* reset console rate limiting for each event */
427 /* Make sure the core doesn't start fetching
428 * kgni_quiesce_seconds until after it sees
429 * kgn_bump_info_rdy set. This is the match to the
430 * first mb in kgnilnd_quiesce_end_callback(). */
432 (void) kgnilnd_bump_timeouts(kgnilnd_data.kgn_quiesce_secs,
433 "hardware quiesce callback");
434 set_mb(kgnilnd_data.kgn_quiesce_secs, 0);
435 set_mb(kgnilnd_data.kgn_bump_info_rdy, 0);
439 /* Reset the kgn_needs_pause flag before coming out of
440 * the pause. This ordering avoids a race with the
441 * setting of this flag in kgnilnd_pause_threads(). */
442 set_mb(kgnilnd_data.kgn_needs_pause, 0);
444 /* ok, let the kids back into the pool */
445 set_mb(kgnilnd_data.kgn_quiesce_trigger, GNILND_QUIESCE_IDLE);
446 kgnilnd_quiesce_wait("hardware quiesce");
449 /* Do a stack reset if needed. */
450 if (kgnilnd_data.kgn_needs_reset) {
451 kgnilnd_reset_stack();
452 set_mb(kgnilnd_data.kgn_needs_reset, 0);
455 mutex_unlock(&kgnilnd_data.kgn_quiesce_mutex);
458 kgnilnd_data.kgn_ruhroh_running = 0;
462 /* Set pause request flag. Any functions that
463 * call this one are responsible for ensuring that
464 * variables they set up are visible on other cores before
465 * this flag setting. This executes in interrupt or kernel
468 kgnilnd_pause_threads(void)
470 /* only device 0 gets the handle, see kgnilnd_dev_init */
471 kgn_device_t *dev = &kgnilnd_data.kgn_devices[0];
472 LASSERTF(dev != NULL, "dev 0 is NULL\n");
474 /* If we're currently in a pause triggered by the pause flag,
475 * there's no need to set it again. We clear the kgn_needs_pause
476 * flag before we reset kgn_quiesce_trigger to avoid a race. The
477 * read memory barrier matches the setmb() on the trigger in
478 * kgnilnd_ruhroh_task(). */
480 if (!(kgnilnd_data.kgn_quiesce_trigger == GNILND_QUIESCE_HW_QUIESCE &&
481 GNILND_IS_QUIESCED)) {
482 CDEBUG(D_NET, "requesting thread pause\n");
484 kgnilnd_data.kgn_needs_pause = 1;
486 wake_up(&kgnilnd_data.kgn_ruhroh_waitq);
488 CDEBUG(D_NET, "thread pause already underway\n");
492 /* Return non-zero if the GNI hardware quiesce flag is set */
494 kgnilnd_hw_in_quiesce(void)
496 /* only device 0 gets the handle, see kgnilnd_dev_init */
497 kgn_device_t *dev0 = &kgnilnd_data.kgn_devices[0];
499 LASSERTF(dev0 != NULL, "dev 0 is NULL\n");
502 return kgnilnd_get_quiesce_status(dev0->gnd_handle) != 0;
506 /* If the GNI hardware quiesce flag is set, initiate our pause and
507 * return non-zero. Also return non-zero if the stack is shutting down. */
509 kgnilnd_check_hw_quiesce(void)
511 if (likely(!kgnilnd_hw_in_quiesce()))
514 if (!kgnilnd_data.kgn_ruhroh_shutdown) {
515 CDEBUG(D_NET, "initiating thread pause\n");
516 kgnilnd_pause_threads();
518 CDEBUG(D_NET, "thread pause bypassed because of shutdown\n");
524 /* Callback from kngi with the quiesce duration. This executes
525 * in interrupt context. */
527 kgnilnd_quiesce_end_callback(gni_nic_handle_t nic_handle, uint64_t msecs)
529 /* only device 0 gets the handle, see kgnilnd_dev_init */
530 kgn_device_t *dev = &kgnilnd_data.kgn_devices[0];
531 LASSERTF(dev != NULL, "dev 0 is NULL\n");
533 if (!kgnilnd_data.kgn_ruhroh_shutdown) {
535 CDEBUG(D_NET, "requesting timeout bump by "LPD64" msecs\n", msecs);
537 /* Save the bump interval and request the bump.
538 * The memory barrier ensures that the interval is in place before
539 * the bump flag can be seen (in case a core is already running the
540 * ruhroh task), and that the bump request flag in place before
541 * the pause request can be seen (to ensure a core doesn't miss the bump
543 /* If another callback occurred before the ruhroh task
544 * finished processing the first bump request, we'd over-write its info.
545 * Nic says that callbacks occur so slowly that this isn't an issue. */
546 set_mb(kgnilnd_data.kgn_quiesce_secs, msecs / MSEC_PER_SEC);
547 set_mb(kgnilnd_data.kgn_bump_info_rdy, 1);
548 kgnilnd_pause_threads();
550 CDEBUG(D_NET, "timeout bump bypassed because of shutdown\n");
555 kgnilnd_critical_error(struct gni_err *err_handle)
557 /* only device 0 gets the handle, see kgnilnd_dev_init */
558 kgn_device_t *dev = &kgnilnd_data.kgn_devices[0];
559 LASSERTF(dev != NULL, "dev 0 is NULL\n");
561 if (!kgnilnd_data.kgn_ruhroh_shutdown) {
562 CDEBUG(D_NET, "requesting stack reset\n");
563 kgnilnd_data.kgn_needs_reset = 1;
564 wake_up(&kgnilnd_data.kgn_ruhroh_waitq);
566 CDEBUG(D_NET, "stack reset bypassed because of shutdown\n");
570 #if defined(GNILND_USE_RCA)
571 #include <krca_lib.h>
573 /* RCA ticket is needed for krca_wakeup_wait_event() */
574 static krca_ticket_t rca_krt = KRCA_NULL_TICKET;
580 static struct rcadata rd[RCA_EVENTS] = {
581 {0, 0, ec_node_unavailable},
582 {0, 0, ec_node_available},
583 {0, 0, ec_node_failed}
586 /* thread for receiving rca events */
588 kgnilnd_rca(void *arg)
597 /* all gnilnd threads need to run fairly urgently */
598 set_user_nice(current, *kgnilnd_tunables.kgn_nice);
601 * Register our service with RCA and subscribe to events
604 rca_krt = KRCA_NULL_TICKET;
605 rc = krca_register(&rca_krt, RCA_SVCTYPE_GNILND, current->pid, 0);
607 CNETERR("krca_register(%x) returned %d\n", current->pid, rc);
611 for (i = 0; i < RCA_EVENTS; i++) {
614 rc = krca_subscribe(&rca_krt, rd[i].ec, RCA_RX_SVC_ANY,
617 if ((rc == -EINTR) && !retry_count) {
619 CNETERR("krca_subscribe returned %d - retrying\n", rc);
620 goto subscribe_retry;
624 CNETERR("rca subscription failed (%d)\n", rc);
628 rd[i].subscribed = 1;
631 while (!kgnilnd_data.kgn_shutdown) {
632 if (unlikely(kgnilnd_data.kgn_quiesce_trigger)) {
633 KGNILND_SPIN_QUIESCE;
635 /* wait here for a subscribed event */
636 rc = krca_wait_event(&rca_krt);
638 /* RCA return values:
639 * 0 indicates krca_wakeup_wait_event caused krca_wait_event
641 * -ERESTARTSYS indicates krca_wait_event returned because of a
643 * -ENOSPC indicates no space available to create an rcad_reg_t
644 * 1 indicates a message is waiting.
650 if (krca_get_message(&rca_krt, &event) == 0) {
651 int node_down = GNILND_RCA_NODE_UNKNOWN;
655 /* Compute nodes don't care about other compute nodes
656 * so we don't need to create a peer.
658 if (GNILND_COMPUTE &&
659 !RSN_GET_FLD(event.ev_gen.svid_node.rs_node_flat,
664 /* Only care about compute and service nodes not GPUs */
665 if (RSN_GET_FLD(event.ev_gen.svid_node.rs_node_flat,
670 switch (event.ev_id) {
671 case ec_node_available:
672 CDEBUG(D_INFO, "ec_node_available\n");
673 node_down = GNILND_RCA_NODE_UP;
676 CDEBUG(D_INFO, "ec_node_failed\n");
677 if (event.ev_len > 0) {
679 "ec_node_failed ignored\n");
682 node_down = GNILND_RCA_NODE_DOWN;
684 case ec_node_unavailable:
685 state = RSN_GET_FLD(event.ev_gen.svid_node.rsn_intval, STATE);
687 CDEBUG(D_INFO, "ec_node_unavailable\n");
690 * Ignore overloaded ec_node_unavailable events
691 * generated by 'xtcli set_reserve'.
693 if (RS_GET_CS_STATE(state) == RS_CS_READY) {
694 CDEBUG(D_INFO, "ignoring "
695 "ec_node_unavailable event with"
696 " RS_CS_READY state\n");
699 node_down = GNILND_RCA_NODE_DOWN;
702 CDEBUG(D_INFO, "unknown event\n");
706 /* if we get an event we don't know about, just go ahead
707 * and wait for another event */
708 if (node_down == GNILND_RCA_NODE_UNKNOWN) {
712 nid = RSN_GET_FLD(event.ev_gen.svid_node.rs_node_flat,
714 CDEBUG(D_INFO,"kgnilnd_rca() reporting nid %d %s\n",
715 (int)nid, node_down ? "down" : "up");
716 kgnilnd_report_node_state(nid, node_down);
719 CNETERR("krca_get_message failed\n");
724 CDEBUG(D_INFO, "done\n");
726 for (i = 0; i < RCA_EVENTS; i++) {
727 if (rd[i].subscribed) {
728 rc = krca_unsubscribe(&rca_krt, rd[i].ticket);
731 CNETERR("rca unsubscribe failed (%d)\n", rc);
734 rd[i].subscribed = 0;
738 krca_unregister(&rca_krt);
739 kgnilnd_thread_fini();
745 kgnilnd_start_rca_thread(void)
747 return kgnilnd_thread_start(kgnilnd_rca, NULL, "kgnilnd_rca", 0);
751 kgnilnd_wakeup_rca_thread(void)
755 ret = krca_wakeup_wait_event(&rca_krt);
758 CDEBUG(D_ERROR, "krca_wakeup_wait_event failed\n");
763 kgnilnd_get_node_state(__u32 nid)
766 int rc = GNILND_RCA_NODE_UNKNOWN;
768 rs_node_array_t nlist;
769 rs_node_t *na = NULL;
771 if ((ret = krca_get_sysnodes(&nlist)) < 0) {
772 CDEBUG(D_NETERROR, "krca_get_sysnodes failed %d\n", ret);
778 for (i = 0; i < nlist.na_len; i++) {
779 if ((rca_nid_t)RSN_GET_FLD(na[i].rs_node_flat, NID) == nid) {
780 rc = RSN_GET_FLD(na[i].rs_node_flat, STATE) == RS_CS_READY ?
781 GNILND_RCA_NODE_UP : GNILND_RCA_NODE_DOWN;
788 CDEBUG(D_NET, "nid %d rc %d (0=up)\n", nid, rc);
792 #else /* GNILND_USE_RCA */
795 kgnilnd_start_rca_thread(void)
801 kgnilnd_wakeup_rca_thread(void)
806 kgnilnd_get_node_state(__u32 nid)
808 return GNILND_RCA_NODE_UP;
810 #endif /* GNILND_USE_RCA */