/* * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. * * Copyright (c) 2011, 2013, Intel Corporation. * * This file is part of Portals * http://sourceforge.net/projects/sandiaportals/ * * Portals is free software; you can redistribute it and/or * modify it under the terms of version 2 of the GNU General Public * License as published by the Free Software Foundation. * * Portals is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Portals; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * */ #define DEBUG_SUBSYSTEM S_LNET #include #if defined(__KERNEL__) && defined(LNET_ROUTER) #define LNET_NRB_TINY_MIN 512 /* min value for each CPT */ #define LNET_NRB_TINY (LNET_NRB_TINY_MIN * 4) #define LNET_NRB_SMALL_MIN 4096 /* min value for each CPT */ #define LNET_NRB_SMALL (LNET_NRB_SMALL_MIN * 4) #define LNET_NRB_LARGE_MIN 256 /* min value for each CPT */ #define LNET_NRB_LARGE (LNET_NRB_LARGE_MIN * 4) static char *forwarding = ""; CFS_MODULE_PARM(forwarding, "s", charp, 0444, "Explicitly enable/disable forwarding between networks"); static int tiny_router_buffers; CFS_MODULE_PARM(tiny_router_buffers, "i", int, 0444, "# of 0 payload messages to buffer in the router"); static int small_router_buffers; CFS_MODULE_PARM(small_router_buffers, "i", int, 0444, "# of small (1 page) messages to buffer in the router"); static int large_router_buffers; CFS_MODULE_PARM(large_router_buffers, "i", int, 0444, "# of large messages to buffer in the router"); static int peer_buffer_credits = 0; CFS_MODULE_PARM(peer_buffer_credits, "i", int, 0444, "# router buffer credits per peer"); static int auto_down = 1; CFS_MODULE_PARM(auto_down, "i", int, 0444, "Automatically mark peers down on comms error"); int lnet_peer_buffer_credits(lnet_ni_t *ni) { /* NI option overrides LNet default */ if (ni->ni_peerrtrcredits > 0) return ni->ni_peerrtrcredits; if (peer_buffer_credits > 0) return peer_buffer_credits; /* As an approximation, allow this peer the same number of router * buffers as it is allowed outstanding sends */ return ni->ni_peertxcredits; } /* forward ref's */ static int lnet_router_checker(void *); #else int lnet_peer_buffer_credits(lnet_ni_t *ni) { return 0; } #endif static int check_routers_before_use = 0; CFS_MODULE_PARM(check_routers_before_use, "i", int, 0444, "Assume routers are down and ping them before use"); static int avoid_asym_router_failure = 1; CFS_MODULE_PARM(avoid_asym_router_failure, "i", int, 0644, "Avoid asymmetrical router failures (0 to disable)"); static int dead_router_check_interval = 60; CFS_MODULE_PARM(dead_router_check_interval, "i", int, 0644, "Seconds between dead router health checks (<= 0 to disable)"); static int live_router_check_interval = 60; CFS_MODULE_PARM(live_router_check_interval, "i", int, 0644, "Seconds between live router health checks (<= 0 to disable)"); static int router_ping_timeout = 50; CFS_MODULE_PARM(router_ping_timeout, "i", int, 0644, "Seconds to wait for the reply to a router health query"); int lnet_peers_start_down(void) { return check_routers_before_use; } void lnet_notify_locked(lnet_peer_t *lp, int notifylnd, int alive, cfs_time_t when) { if (cfs_time_before(when, lp->lp_timestamp)) { /* out of date information */ CDEBUG(D_NET, "Out of date\n"); return; } lp->lp_timestamp = when; /* update timestamp */ lp->lp_ping_deadline = 0; /* disable ping timeout */ if (lp->lp_alive_count != 0 && /* got old news */ (!lp->lp_alive) == (!alive)) { /* new date for old news */ CDEBUG(D_NET, "Old news\n"); return; } /* Flag that notification is outstanding */ lp->lp_alive_count++; lp->lp_alive = !(!alive); /* 1 bit! */ lp->lp_notify = 1; lp->lp_notifylnd |= notifylnd; if (lp->lp_alive) lp->lp_ping_feats = LNET_PING_FEAT_INVAL; /* reset */ CDEBUG(D_NET, "set %s %d\n", libcfs_nid2str(lp->lp_nid), alive); } void lnet_ni_notify_locked(lnet_ni_t *ni, lnet_peer_t *lp) { int alive; int notifylnd; /* Notify only in 1 thread at any time to ensure ordered notification. * NB individual events can be missed; the only guarantee is that you * always get the most recent news */ if (lp->lp_notifying) return; lp->lp_notifying = 1; while (lp->lp_notify) { alive = lp->lp_alive; notifylnd = lp->lp_notifylnd; lp->lp_notifylnd = 0; lp->lp_notify = 0; if (notifylnd && ni->ni_lnd->lnd_notify != NULL) { lnet_net_unlock(lp->lp_cpt); /* A new notification could happen now; I'll handle it * when control returns to me */ (ni->ni_lnd->lnd_notify)(ni, lp->lp_nid, alive); lnet_net_lock(lp->lp_cpt); } } lp->lp_notifying = 0; } static void lnet_rtr_addref_locked(lnet_peer_t *lp) { LASSERT(lp->lp_refcount > 0); LASSERT(lp->lp_rtr_refcount >= 0); /* lnet_net_lock must be exclusively locked */ lp->lp_rtr_refcount++; if (lp->lp_rtr_refcount == 1) { cfs_list_t *pos; /* a simple insertion sort */ cfs_list_for_each_prev(pos, &the_lnet.ln_routers) { lnet_peer_t *rtr = cfs_list_entry(pos, lnet_peer_t, lp_rtr_list); if (rtr->lp_nid < lp->lp_nid) break; } cfs_list_add(&lp->lp_rtr_list, pos); /* addref for the_lnet.ln_routers */ lnet_peer_addref_locked(lp); the_lnet.ln_routers_version++; } } static void lnet_rtr_decref_locked(lnet_peer_t *lp) { LASSERT(lp->lp_refcount > 0); LASSERT(lp->lp_rtr_refcount > 0); /* lnet_net_lock must be exclusively locked */ lp->lp_rtr_refcount--; if (lp->lp_rtr_refcount == 0) { LASSERT(cfs_list_empty(&lp->lp_routes)); if (lp->lp_rcd != NULL) { cfs_list_add(&lp->lp_rcd->rcd_list, &the_lnet.ln_rcd_deathrow); lp->lp_rcd = NULL; } cfs_list_del(&lp->lp_rtr_list); /* decref for the_lnet.ln_routers */ lnet_peer_decref_locked(lp); the_lnet.ln_routers_version++; } } lnet_remotenet_t * lnet_find_net_locked (__u32 net) { lnet_remotenet_t *rnet; cfs_list_t *tmp; cfs_list_t *rn_list; LASSERT(!the_lnet.ln_shutdown); rn_list = lnet_net2rnethash(net); cfs_list_for_each(tmp, rn_list) { rnet = cfs_list_entry(tmp, lnet_remotenet_t, lrn_list); if (rnet->lrn_net == net) return rnet; } return NULL; } static void lnet_shuffle_seed(void) { static int seeded = 0; int lnd_type, seed[2]; struct timeval tv; lnet_ni_t *ni; cfs_list_t *tmp; if (seeded) return; cfs_get_random_bytes(seed, sizeof(seed)); /* Nodes with small feet have little entropy * the NID for this node gives the most entropy in the low bits */ cfs_list_for_each(tmp, &the_lnet.ln_nis) { ni = cfs_list_entry(tmp, lnet_ni_t, ni_list); lnd_type = LNET_NETTYP(LNET_NIDNET(ni->ni_nid)); if (lnd_type != LOLND) seed[0] ^= (LNET_NIDADDR(ni->ni_nid) | lnd_type); } do_gettimeofday(&tv); cfs_srand(tv.tv_sec ^ seed[0], tv.tv_usec ^ seed[1]); seeded = 1; return; } /* NB expects LNET_LOCK held */ void lnet_add_route_to_rnet (lnet_remotenet_t *rnet, lnet_route_t *route) { unsigned int len = 0; unsigned int offset = 0; cfs_list_t *e; lnet_shuffle_seed(); cfs_list_for_each (e, &rnet->lrn_routes) { len++; } /* len+1 positions to add a new entry, also prevents division by 0 */ offset = cfs_rand() % (len + 1); cfs_list_for_each (e, &rnet->lrn_routes) { if (offset == 0) break; offset--; } cfs_list_add(&route->lr_list, e); cfs_list_add(&route->lr_gwlist, &route->lr_gateway->lp_routes); the_lnet.ln_remote_nets_version++; lnet_rtr_addref_locked(route->lr_gateway); } int lnet_add_route(__u32 net, unsigned int hops, lnet_nid_t gateway, unsigned int priority) { cfs_list_t *e; lnet_remotenet_t *rnet; lnet_remotenet_t *rnet2; lnet_route_t *route; lnet_ni_t *ni; int add_route; int rc; CDEBUG(D_NET, "Add route: net %s hops %u priority %u gw %s\n", libcfs_net2str(net), hops, priority, libcfs_nid2str(gateway)); if (gateway == LNET_NID_ANY || LNET_NETTYP(LNET_NIDNET(gateway)) == LOLND || net == LNET_NIDNET(LNET_NID_ANY) || LNET_NETTYP(net) == LOLND || LNET_NIDNET(gateway) == net || hops < 1 || hops > 255) return (-EINVAL); if (lnet_islocalnet(net)) /* it's a local network */ return 0; /* ignore the route entry */ /* Assume net, route, all new */ LIBCFS_ALLOC(route, sizeof(*route)); LIBCFS_ALLOC(rnet, sizeof(*rnet)); if (route == NULL || rnet == NULL) { CERROR("Out of memory creating route %s %d %s\n", libcfs_net2str(net), hops, libcfs_nid2str(gateway)); if (route != NULL) LIBCFS_FREE(route, sizeof(*route)); if (rnet != NULL) LIBCFS_FREE(rnet, sizeof(*rnet)); return -ENOMEM; } CFS_INIT_LIST_HEAD(&rnet->lrn_routes); rnet->lrn_net = net; route->lr_hops = hops; route->lr_net = net; route->lr_priority = priority; lnet_net_lock(LNET_LOCK_EX); rc = lnet_nid2peer_locked(&route->lr_gateway, gateway, LNET_LOCK_EX); if (rc != 0) { lnet_net_unlock(LNET_LOCK_EX); LIBCFS_FREE(route, sizeof(*route)); LIBCFS_FREE(rnet, sizeof(*rnet)); if (rc == -EHOSTUNREACH) { /* gateway is not on a local net */ return 0; /* ignore the route entry */ } else { CERROR("Error %d creating route %s %d %s\n", rc, libcfs_net2str(net), hops, libcfs_nid2str(gateway)); } return rc; } LASSERT (!the_lnet.ln_shutdown); rnet2 = lnet_find_net_locked(net); if (rnet2 == NULL) { /* new network */ cfs_list_add_tail(&rnet->lrn_list, lnet_net2rnethash(net)); rnet2 = rnet; } /* Search for a duplicate route (it's a NOOP if it is) */ add_route = 1; cfs_list_for_each (e, &rnet2->lrn_routes) { lnet_route_t *route2 = cfs_list_entry(e, lnet_route_t, lr_list); if (route2->lr_gateway == route->lr_gateway) { add_route = 0; break; } /* our lookups must be true */ LASSERT (route2->lr_gateway->lp_nid != gateway); } if (add_route) { lnet_peer_addref_locked(route->lr_gateway); /* +1 for notify */ lnet_add_route_to_rnet(rnet2, route); ni = route->lr_gateway->lp_ni; lnet_net_unlock(LNET_LOCK_EX); /* XXX Assume alive */ if (ni->ni_lnd->lnd_notify != NULL) (ni->ni_lnd->lnd_notify)(ni, gateway, 1); lnet_net_lock(LNET_LOCK_EX); } /* -1 for notify or !add_route */ lnet_peer_decref_locked(route->lr_gateway); lnet_net_unlock(LNET_LOCK_EX); if (!add_route) LIBCFS_FREE(route, sizeof(*route)); if (rnet != rnet2) LIBCFS_FREE(rnet, sizeof(*rnet)); return 0; } int lnet_check_routes(void) { lnet_remotenet_t *rnet; lnet_route_t *route; lnet_route_t *route2; cfs_list_t *e1; cfs_list_t *e2; int cpt; cfs_list_t *rn_list; int i; cpt = lnet_net_lock_current(); for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++) { rn_list = &the_lnet.ln_remote_nets_hash[i]; cfs_list_for_each(e1, rn_list) { rnet = cfs_list_entry(e1, lnet_remotenet_t, lrn_list); route2 = NULL; cfs_list_for_each(e2, &rnet->lrn_routes) { lnet_nid_t nid1; lnet_nid_t nid2; int net; route = cfs_list_entry(e2, lnet_route_t, lr_list); if (route2 == NULL) { route2 = route; continue; } if (route->lr_gateway->lp_ni == route2->lr_gateway->lp_ni) continue; nid1 = route->lr_gateway->lp_nid; nid2 = route2->lr_gateway->lp_nid; net = rnet->lrn_net; lnet_net_unlock(cpt); CERROR("Routes to %s via %s and %s not " "supported\n", libcfs_net2str(net), libcfs_nid2str(nid1), libcfs_nid2str(nid2)); return -EINVAL; } } } lnet_net_unlock(cpt); return 0; } int lnet_del_route(__u32 net, lnet_nid_t gw_nid) { struct lnet_peer *gateway; lnet_remotenet_t *rnet; lnet_route_t *route; cfs_list_t *e1; cfs_list_t *e2; int rc = -ENOENT; cfs_list_t *rn_list; int idx = 0; CDEBUG(D_NET, "Del route: net %s : gw %s\n", libcfs_net2str(net), libcfs_nid2str(gw_nid)); /* NB Caller may specify either all routes via the given gateway * or a specific route entry actual NIDs) */ lnet_net_lock(LNET_LOCK_EX); if (net == LNET_NIDNET(LNET_NID_ANY)) rn_list = &the_lnet.ln_remote_nets_hash[0]; else rn_list = lnet_net2rnethash(net); again: cfs_list_for_each(e1, rn_list) { rnet = cfs_list_entry(e1, lnet_remotenet_t, lrn_list); if (!(net == LNET_NIDNET(LNET_NID_ANY) || net == rnet->lrn_net)) continue; cfs_list_for_each(e2, &rnet->lrn_routes) { route = cfs_list_entry(e2, lnet_route_t, lr_list); gateway = route->lr_gateway; if (!(gw_nid == LNET_NID_ANY || gw_nid == gateway->lp_nid)) continue; cfs_list_del(&route->lr_list); cfs_list_del(&route->lr_gwlist); the_lnet.ln_remote_nets_version++; if (cfs_list_empty(&rnet->lrn_routes)) cfs_list_del(&rnet->lrn_list); else rnet = NULL; lnet_rtr_decref_locked(gateway); lnet_peer_decref_locked(gateway); lnet_net_unlock(LNET_LOCK_EX); LIBCFS_FREE(route, sizeof(*route)); if (rnet != NULL) LIBCFS_FREE(rnet, sizeof(*rnet)); rc = 0; lnet_net_lock(LNET_LOCK_EX); goto again; } } if (net == LNET_NIDNET(LNET_NID_ANY) && ++idx < LNET_REMOTE_NETS_HASH_SIZE) { rn_list = &the_lnet.ln_remote_nets_hash[idx]; goto again; } lnet_net_unlock(LNET_LOCK_EX); return rc; } void lnet_destroy_routes (void) { lnet_del_route(LNET_NIDNET(LNET_NID_ANY), LNET_NID_ANY); } int lnet_get_route(int idx, __u32 *net, __u32 *hops, lnet_nid_t *gateway, __u32 *alive, __u32 *priority) { cfs_list_t *e1; cfs_list_t *e2; lnet_remotenet_t *rnet; lnet_route_t *route; int cpt; int i; cfs_list_t *rn_list; cpt = lnet_net_lock_current(); for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++) { rn_list = &the_lnet.ln_remote_nets_hash[i]; cfs_list_for_each(e1, rn_list) { rnet = cfs_list_entry(e1, lnet_remotenet_t, lrn_list); cfs_list_for_each(e2, &rnet->lrn_routes) { route = cfs_list_entry(e2, lnet_route_t, lr_list); if (idx-- == 0) { *net = rnet->lrn_net; *hops = route->lr_hops; *priority = route->lr_priority; *gateway = route->lr_gateway->lp_nid; *alive = route->lr_gateway->lp_alive; lnet_net_unlock(cpt); return 0; } } } } lnet_net_unlock(cpt); return -ENOENT; } void lnet_swap_pinginfo(lnet_ping_info_t *info) { int i; lnet_ni_status_t *stat; __swab32s(&info->pi_magic); __swab32s(&info->pi_features); __swab32s(&info->pi_pid); __swab32s(&info->pi_nnis); for (i = 0; i < info->pi_nnis && i < LNET_MAX_RTR_NIS; i++) { stat = &info->pi_ni[i]; __swab64s(&stat->ns_nid); __swab32s(&stat->ns_status); } return; } /** * parse router-checker pinginfo, record number of down NIs for remote * networks on that router. */ static void lnet_parse_rc_info(lnet_rc_data_t *rcd) { lnet_ping_info_t *info = rcd->rcd_pinginfo; struct lnet_peer *gw = rcd->rcd_gateway; lnet_route_t *rtr; if (!gw->lp_alive) return; if (info->pi_magic == __swab32(LNET_PROTO_PING_MAGIC)) lnet_swap_pinginfo(info); /* NB always racing with network! */ if (info->pi_magic != LNET_PROTO_PING_MAGIC) { CDEBUG(D_NET, "%s: Unexpected magic %08x\n", libcfs_nid2str(gw->lp_nid), info->pi_magic); gw->lp_ping_feats = LNET_PING_FEAT_INVAL; return; } gw->lp_ping_feats = info->pi_features; if ((gw->lp_ping_feats & LNET_PING_FEAT_MASK) == 0) { CDEBUG(D_NET, "%s: Unexpected features 0x%x\n", libcfs_nid2str(gw->lp_nid), gw->lp_ping_feats); return; /* nothing I can understand */ } if ((gw->lp_ping_feats & LNET_PING_FEAT_NI_STATUS) == 0) return; /* can't carry NI status info */ cfs_list_for_each_entry(rtr, &gw->lp_routes, lr_gwlist) { int down = 0; int up = 0; int i; for (i = 0; i < info->pi_nnis && i < LNET_MAX_RTR_NIS; i++) { lnet_ni_status_t *stat = &info->pi_ni[i]; lnet_nid_t nid = stat->ns_nid; if (nid == LNET_NID_ANY) { CDEBUG(D_NET, "%s: unexpected LNET_NID_ANY\n", libcfs_nid2str(gw->lp_nid)); gw->lp_ping_feats = LNET_PING_FEAT_INVAL; return; } if (LNET_NETTYP(LNET_NIDNET(nid)) == LOLND) continue; if (stat->ns_status == LNET_NI_STATUS_DOWN) { down++; continue; } if (stat->ns_status == LNET_NI_STATUS_UP) { if (LNET_NIDNET(nid) == rtr->lr_net) { up = 1; break; } continue; } CDEBUG(D_NET, "%s: Unexpected status 0x%x\n", libcfs_nid2str(gw->lp_nid), stat->ns_status); gw->lp_ping_feats = LNET_PING_FEAT_INVAL; return; } if (up) { /* ignore downed NIs if NI for dest network is up */ rtr->lr_downis = 0; continue; } rtr->lr_downis = down; } } static void lnet_router_checker_event(lnet_event_t *event) { lnet_rc_data_t *rcd = event->md.user_ptr; struct lnet_peer *lp; LASSERT(rcd != NULL); if (event->unlinked) { LNetInvalidateHandle(&rcd->rcd_mdh); return; } LASSERT(event->type == LNET_EVENT_SEND || event->type == LNET_EVENT_REPLY); lp = rcd->rcd_gateway; LASSERT(lp != NULL); /* NB: it's called with holding lnet_res_lock, we have a few * places need to hold both locks at the same time, please take * care of lock ordering */ lnet_net_lock(lp->lp_cpt); if (!lnet_isrouter(lp) || lp->lp_rcd != rcd) { /* ignore if no longer a router or rcd is replaced */ goto out; } if (event->type == LNET_EVENT_SEND) { lp->lp_ping_notsent = 0; if (event->status == 0) goto out; } /* LNET_EVENT_REPLY */ /* A successful REPLY means the router is up. If _any_ comms * to the router fail I assume it's down (this will happen if * we ping alive routers to try to detect router death before * apps get burned). */ lnet_notify_locked(lp, 1, (event->status == 0), cfs_time_current()); /* The router checker will wake up very shortly and do the * actual notification. * XXX If 'lp' stops being a router before then, it will still * have the notification pending!!! */ if (avoid_asym_router_failure && event->status == 0) lnet_parse_rc_info(rcd); out: lnet_net_unlock(lp->lp_cpt); } void lnet_wait_known_routerstate(void) { lnet_peer_t *rtr; cfs_list_t *entry; int all_known; LASSERT (the_lnet.ln_rc_state == LNET_RC_STATE_RUNNING); for (;;) { int cpt = lnet_net_lock_current(); all_known = 1; cfs_list_for_each (entry, &the_lnet.ln_routers) { rtr = cfs_list_entry(entry, lnet_peer_t, lp_rtr_list); if (rtr->lp_alive_count == 0) { all_known = 0; break; } } lnet_net_unlock(cpt); if (all_known) return; #ifndef __KERNEL__ lnet_router_checker(); #endif cfs_pause(cfs_time_seconds(1)); } } void lnet_update_ni_status_locked(void) { lnet_ni_t *ni; long now; int timeout; LASSERT(the_lnet.ln_routing); timeout = router_ping_timeout + MAX(live_router_check_interval, dead_router_check_interval); now = cfs_time_current_sec(); cfs_list_for_each_entry(ni, &the_lnet.ln_nis, ni_list) { if (ni->ni_lnd->lnd_type == LOLND) continue; if (now < ni->ni_last_alive + timeout) continue; lnet_ni_lock(ni); /* re-check with lock */ if (now < ni->ni_last_alive + timeout) { lnet_ni_unlock(ni); continue; } LASSERT(ni->ni_status != NULL); if (ni->ni_status->ns_status != LNET_NI_STATUS_DOWN) { CDEBUG(D_NET, "NI(%s:%d) status changed to down\n", libcfs_nid2str(ni->ni_nid), timeout); /* NB: so far, this is the only place to set * NI status to "down" */ ni->ni_status->ns_status = LNET_NI_STATUS_DOWN; } lnet_ni_unlock(ni); } } void lnet_destroy_rc_data(lnet_rc_data_t *rcd) { LASSERT(cfs_list_empty(&rcd->rcd_list)); /* detached from network */ LASSERT(LNetHandleIsInvalid(rcd->rcd_mdh)); if (rcd->rcd_gateway != NULL) { int cpt = rcd->rcd_gateway->lp_cpt; lnet_net_lock(cpt); lnet_peer_decref_locked(rcd->rcd_gateway); lnet_net_unlock(cpt); } if (rcd->rcd_pinginfo != NULL) LIBCFS_FREE(rcd->rcd_pinginfo, LNET_PINGINFO_SIZE); LIBCFS_FREE(rcd, sizeof(*rcd)); } lnet_rc_data_t * lnet_create_rc_data_locked(lnet_peer_t *gateway) { lnet_rc_data_t *rcd = NULL; lnet_ping_info_t *pi; int rc; int i; lnet_net_unlock(gateway->lp_cpt); LIBCFS_ALLOC(rcd, sizeof(*rcd)); if (rcd == NULL) goto out; LNetInvalidateHandle(&rcd->rcd_mdh); CFS_INIT_LIST_HEAD(&rcd->rcd_list); LIBCFS_ALLOC(pi, LNET_PINGINFO_SIZE); if (pi == NULL) goto out; memset(pi, 0, LNET_PINGINFO_SIZE); for (i = 0; i < LNET_MAX_RTR_NIS; i++) { pi->pi_ni[i].ns_nid = LNET_NID_ANY; pi->pi_ni[i].ns_status = LNET_NI_STATUS_INVALID; } rcd->rcd_pinginfo = pi; LASSERT (!LNetHandleIsInvalid(the_lnet.ln_rc_eqh)); rc = LNetMDBind((lnet_md_t){.start = pi, .user_ptr = rcd, .length = LNET_PINGINFO_SIZE, .threshold = LNET_MD_THRESH_INF, .options = LNET_MD_TRUNCATE, .eq_handle = the_lnet.ln_rc_eqh}, LNET_UNLINK, &rcd->rcd_mdh); if (rc < 0) { CERROR("Can't bind MD: %d\n", rc); goto out; } LASSERT(rc == 0); lnet_net_lock(gateway->lp_cpt); /* router table changed or someone has created rcd for this gateway */ if (!lnet_isrouter(gateway) || gateway->lp_rcd != NULL) { lnet_net_unlock(gateway->lp_cpt); goto out; } lnet_peer_addref_locked(gateway); rcd->rcd_gateway = gateway; gateway->lp_rcd = rcd; gateway->lp_ping_notsent = 0; return rcd; out: if (rcd != NULL) { if (!LNetHandleIsInvalid(rcd->rcd_mdh)) { rc = LNetMDUnlink(rcd->rcd_mdh); LASSERT(rc == 0); } lnet_destroy_rc_data(rcd); } lnet_net_lock(gateway->lp_cpt); return gateway->lp_rcd; } static int lnet_router_check_interval (lnet_peer_t *rtr) { int secs; secs = rtr->lp_alive ? live_router_check_interval : dead_router_check_interval; if (secs < 0) secs = 0; return secs; } static void lnet_ping_router_locked (lnet_peer_t *rtr) { lnet_rc_data_t *rcd = NULL; cfs_time_t now = cfs_time_current(); int secs; lnet_peer_addref_locked(rtr); if (rtr->lp_ping_deadline != 0 && /* ping timed out? */ cfs_time_after(now, rtr->lp_ping_deadline)) lnet_notify_locked(rtr, 1, 0, now); /* Run any outstanding notifications */ lnet_ni_notify_locked(rtr->lp_ni, rtr); if (!lnet_isrouter(rtr) || the_lnet.ln_rc_state != LNET_RC_STATE_RUNNING) { /* router table changed or router checker is shutting down */ lnet_peer_decref_locked(rtr); return; } rcd = rtr->lp_rcd != NULL ? rtr->lp_rcd : lnet_create_rc_data_locked(rtr); if (rcd == NULL) return; secs = lnet_router_check_interval(rtr); CDEBUG(D_NET, "rtr %s %d: deadline %lu ping_notsent %d alive %d " "alive_count %d lp_ping_timestamp %lu\n", libcfs_nid2str(rtr->lp_nid), secs, rtr->lp_ping_deadline, rtr->lp_ping_notsent, rtr->lp_alive, rtr->lp_alive_count, rtr->lp_ping_timestamp); if (secs != 0 && !rtr->lp_ping_notsent && cfs_time_after(now, cfs_time_add(rtr->lp_ping_timestamp, cfs_time_seconds(secs)))) { int rc; lnet_process_id_t id; lnet_handle_md_t mdh; id.nid = rtr->lp_nid; id.pid = LUSTRE_SRV_LNET_PID; CDEBUG(D_NET, "Check: %s\n", libcfs_id2str(id)); rtr->lp_ping_notsent = 1; rtr->lp_ping_timestamp = now; mdh = rcd->rcd_mdh; if (rtr->lp_ping_deadline == 0) { rtr->lp_ping_deadline = cfs_time_shift(router_ping_timeout); } lnet_net_unlock(rtr->lp_cpt); rc = LNetGet(LNET_NID_ANY, mdh, id, LNET_RESERVED_PORTAL, LNET_PROTO_PING_MATCHBITS, 0); lnet_net_lock(rtr->lp_cpt); if (rc != 0) rtr->lp_ping_notsent = 0; /* no event pending */ } lnet_peer_decref_locked(rtr); return; } int lnet_router_checker_start(void) { int rc; int eqsz; #ifdef __KERNEL__ struct task_struct *task; #else /* __KERNEL__ */ lnet_peer_t *rtr; __u64 version; int nrtr = 0; int router_checker_max_eqsize = 10240; LASSERT (check_routers_before_use); LASSERT (dead_router_check_interval > 0); lnet_net_lock(0); /* As an approximation, allow each router the same number of * outstanding events as it is allowed outstanding sends */ eqsz = 0; version = the_lnet.ln_routers_version; cfs_list_for_each_entry(rtr, &the_lnet.ln_routers, lp_rtr_list) { lnet_ni_t *ni = rtr->lp_ni; lnet_process_id_t id; nrtr++; eqsz += ni->ni_peertxcredits; /* one async ping reply per router */ id.nid = rtr->lp_nid; id.pid = LUSTRE_SRV_LNET_PID; lnet_net_unlock(0); rc = LNetSetAsync(id, 1); if (rc != 0) { CWARN("LNetSetAsync %s failed: %d\n", libcfs_id2str(id), rc); return rc; } lnet_net_lock(0); /* NB router list doesn't change in userspace */ LASSERT(version == the_lnet.ln_routers_version); } lnet_net_unlock(0); if (nrtr == 0) { CDEBUG(D_NET, "No router found, not starting router checker\n"); return 0; } /* at least allow a SENT and a REPLY per router */ if (router_checker_max_eqsize < 2 * nrtr) router_checker_max_eqsize = 2 * nrtr; LASSERT (eqsz > 0); if (eqsz > router_checker_max_eqsize) eqsz = router_checker_max_eqsize; #endif LASSERT (the_lnet.ln_rc_state == LNET_RC_STATE_SHUTDOWN); if (check_routers_before_use && dead_router_check_interval <= 0) { LCONSOLE_ERROR_MSG(0x10a, "'dead_router_check_interval' must be" " set if 'check_routers_before_use' is set" "\n"); return -EINVAL; } if (!the_lnet.ln_routing && live_router_check_interval <= 0 && dead_router_check_interval <= 0) return 0; #ifdef __KERNEL__ sema_init(&the_lnet.ln_rc_signal, 0); /* EQ size doesn't matter; the callback is guaranteed to get every * event */ eqsz = 0; rc = LNetEQAlloc(eqsz, lnet_router_checker_event, &the_lnet.ln_rc_eqh); #else rc = LNetEQAlloc(eqsz, LNET_EQ_HANDLER_NONE, &the_lnet.ln_rc_eqh); #endif if (rc != 0) { CERROR("Can't allocate EQ(%d): %d\n", eqsz, rc); return -ENOMEM; } the_lnet.ln_rc_state = LNET_RC_STATE_RUNNING; #ifdef __KERNEL__ task = kthread_run(lnet_router_checker, NULL, "router_checker"); if (IS_ERR(task)) { rc = PTR_ERR(task); CERROR("Can't start router checker thread: %d\n", rc); /* block until event callback signals exit */ down(&the_lnet.ln_rc_signal); rc = LNetEQFree(the_lnet.ln_rc_eqh); LASSERT(rc == 0); the_lnet.ln_rc_state = LNET_RC_STATE_SHUTDOWN; return -ENOMEM; } #endif if (check_routers_before_use) { /* Note that a helpful side-effect of pinging all known routers * at startup is that it makes them drop stale connections they * may have to a previous instance of me. */ lnet_wait_known_routerstate(); } return 0; } void lnet_router_checker_stop (void) { int rc; if (the_lnet.ln_rc_state == LNET_RC_STATE_SHUTDOWN) return; LASSERT (the_lnet.ln_rc_state == LNET_RC_STATE_RUNNING); the_lnet.ln_rc_state = LNET_RC_STATE_STOPPING; #ifdef __KERNEL__ /* block until event callback signals exit */ down(&the_lnet.ln_rc_signal); #else lnet_router_checker(); #endif LASSERT(the_lnet.ln_rc_state == LNET_RC_STATE_SHUTDOWN); rc = LNetEQFree(the_lnet.ln_rc_eqh); LASSERT (rc == 0); return; } static void lnet_prune_rc_data(int wait_unlink) { lnet_rc_data_t *rcd; lnet_rc_data_t *tmp; lnet_peer_t *lp; cfs_list_t head; int i = 2; if (likely(the_lnet.ln_rc_state == LNET_RC_STATE_RUNNING && cfs_list_empty(&the_lnet.ln_rcd_deathrow) && cfs_list_empty(&the_lnet.ln_rcd_zombie))) return; CFS_INIT_LIST_HEAD(&head); lnet_net_lock(LNET_LOCK_EX); if (the_lnet.ln_rc_state != LNET_RC_STATE_RUNNING) { /* router checker is stopping, prune all */ cfs_list_for_each_entry(lp, &the_lnet.ln_routers, lp_rtr_list) { if (lp->lp_rcd == NULL) continue; LASSERT(cfs_list_empty(&lp->lp_rcd->rcd_list)); cfs_list_add(&lp->lp_rcd->rcd_list, &the_lnet.ln_rcd_deathrow); lp->lp_rcd = NULL; } } /* unlink all RCDs on deathrow list */ cfs_list_splice_init(&the_lnet.ln_rcd_deathrow, &head); if (!cfs_list_empty(&head)) { lnet_net_unlock(LNET_LOCK_EX); cfs_list_for_each_entry(rcd, &head, rcd_list) LNetMDUnlink(rcd->rcd_mdh); lnet_net_lock(LNET_LOCK_EX); } cfs_list_splice_init(&head, &the_lnet.ln_rcd_zombie); /* release all zombie RCDs */ while (!cfs_list_empty(&the_lnet.ln_rcd_zombie)) { cfs_list_for_each_entry_safe(rcd, tmp, &the_lnet.ln_rcd_zombie, rcd_list) { if (LNetHandleIsInvalid(rcd->rcd_mdh)) cfs_list_move(&rcd->rcd_list, &head); } wait_unlink = wait_unlink && !cfs_list_empty(&the_lnet.ln_rcd_zombie); lnet_net_unlock(LNET_LOCK_EX); while (!cfs_list_empty(&head)) { rcd = cfs_list_entry(head.next, lnet_rc_data_t, rcd_list); cfs_list_del_init(&rcd->rcd_list); lnet_destroy_rc_data(rcd); } if (!wait_unlink) return; i++; CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, "Waiting for rc buffers to unlink\n"); cfs_pause(cfs_time_seconds(1) / 4); lnet_net_lock(LNET_LOCK_EX); } lnet_net_unlock(LNET_LOCK_EX); } #if defined(__KERNEL__) && defined(LNET_ROUTER) static int lnet_router_checker(void *arg) { lnet_peer_t *rtr; cfs_list_t *entry; cfs_block_allsigs(); LASSERT (the_lnet.ln_rc_state == LNET_RC_STATE_RUNNING); while (the_lnet.ln_rc_state == LNET_RC_STATE_RUNNING) { __u64 version; int cpt; int cpt2; cpt = lnet_net_lock_current(); rescan: version = the_lnet.ln_routers_version; cfs_list_for_each(entry, &the_lnet.ln_routers) { rtr = cfs_list_entry(entry, lnet_peer_t, lp_rtr_list); cpt2 = lnet_cpt_of_nid_locked(rtr->lp_nid); if (cpt != cpt2) { lnet_net_unlock(cpt); cpt = cpt2; lnet_net_lock(cpt); /* the routers list has changed */ if (version != the_lnet.ln_routers_version) goto rescan; } lnet_ping_router_locked(rtr); /* NB dropped lock */ if (version != the_lnet.ln_routers_version) { /* the routers list has changed */ goto rescan; } } if (the_lnet.ln_routing) lnet_update_ni_status_locked(); lnet_net_unlock(cpt); lnet_prune_rc_data(0); /* don't wait for UNLINK */ /* Call cfs_pause() here always adds 1 to load average * because kernel counts # active tasks as nr_running * + nr_uninterruptible. */ schedule_timeout_and_set_state(TASK_INTERRUPTIBLE, cfs_time_seconds(1)); } LASSERT(the_lnet.ln_rc_state == LNET_RC_STATE_STOPPING); lnet_prune_rc_data(1); /* wait for UNLINK */ the_lnet.ln_rc_state = LNET_RC_STATE_SHUTDOWN; up(&the_lnet.ln_rc_signal); /* The unlink event callback will signal final completion */ return 0; } void lnet_destroy_rtrbuf(lnet_rtrbuf_t *rb, int npages) { int sz = offsetof(lnet_rtrbuf_t, rb_kiov[npages]); while (--npages >= 0) __free_page(rb->rb_kiov[npages].kiov_page); LIBCFS_FREE(rb, sz); } lnet_rtrbuf_t * lnet_new_rtrbuf(lnet_rtrbufpool_t *rbp, int cpt) { int npages = rbp->rbp_npages; int sz = offsetof(lnet_rtrbuf_t, rb_kiov[npages]); struct page *page; lnet_rtrbuf_t *rb; int i; LIBCFS_CPT_ALLOC(rb, lnet_cpt_table(), cpt, sz); if (rb == NULL) return NULL; rb->rb_pool = rbp; for (i = 0; i < npages; i++) { page = cfs_page_cpt_alloc(lnet_cpt_table(), cpt, __GFP_ZERO | GFP_IOFS); if (page == NULL) { while (--i >= 0) __free_page(rb->rb_kiov[i].kiov_page); LIBCFS_FREE(rb, sz); return NULL; } rb->rb_kiov[i].kiov_len = PAGE_CACHE_SIZE; rb->rb_kiov[i].kiov_offset = 0; rb->rb_kiov[i].kiov_page = page; } return rb; } void lnet_rtrpool_free_bufs(lnet_rtrbufpool_t *rbp) { int npages = rbp->rbp_npages; int nbuffers = 0; lnet_rtrbuf_t *rb; if (rbp->rbp_nbuffers == 0) /* not initialized or already freed */ return; LASSERT (cfs_list_empty(&rbp->rbp_msgs)); LASSERT (rbp->rbp_credits == rbp->rbp_nbuffers); while (!cfs_list_empty(&rbp->rbp_bufs)) { LASSERT (rbp->rbp_credits > 0); rb = cfs_list_entry(rbp->rbp_bufs.next, lnet_rtrbuf_t, rb_list); cfs_list_del(&rb->rb_list); lnet_destroy_rtrbuf(rb, npages); nbuffers++; } LASSERT (rbp->rbp_nbuffers == nbuffers); LASSERT (rbp->rbp_credits == nbuffers); rbp->rbp_nbuffers = rbp->rbp_credits = 0; } int lnet_rtrpool_alloc_bufs(lnet_rtrbufpool_t *rbp, int nbufs, int cpt) { lnet_rtrbuf_t *rb; int i; if (rbp->rbp_nbuffers != 0) { LASSERT (rbp->rbp_nbuffers == nbufs); return 0; } for (i = 0; i < nbufs; i++) { rb = lnet_new_rtrbuf(rbp, cpt); if (rb == NULL) { CERROR("Failed to allocate %d router bufs of %d pages\n", nbufs, rbp->rbp_npages); return -ENOMEM; } rbp->rbp_nbuffers++; rbp->rbp_credits++; rbp->rbp_mincredits++; cfs_list_add(&rb->rb_list, &rbp->rbp_bufs); /* No allocation "under fire" */ /* Otherwise we'd need code to schedule blocked msgs etc */ LASSERT (!the_lnet.ln_routing); } LASSERT (rbp->rbp_credits == nbufs); return 0; } void lnet_rtrpool_init(lnet_rtrbufpool_t *rbp, int npages) { CFS_INIT_LIST_HEAD(&rbp->rbp_msgs); CFS_INIT_LIST_HEAD(&rbp->rbp_bufs); rbp->rbp_npages = npages; rbp->rbp_credits = 0; rbp->rbp_mincredits = 0; } void lnet_rtrpools_free(void) { lnet_rtrbufpool_t *rtrp; int i; if (the_lnet.ln_rtrpools == NULL) /* uninitialized or freed */ return; cfs_percpt_for_each(rtrp, i, the_lnet.ln_rtrpools) { lnet_rtrpool_free_bufs(&rtrp[0]); lnet_rtrpool_free_bufs(&rtrp[1]); lnet_rtrpool_free_bufs(&rtrp[2]); } cfs_percpt_free(the_lnet.ln_rtrpools); the_lnet.ln_rtrpools = NULL; } static int lnet_nrb_tiny_calculate(int npages) { int nrbs = LNET_NRB_TINY; if (tiny_router_buffers < 0) { LCONSOLE_ERROR_MSG(0x10c, "tiny_router_buffers=%d invalid when " "routing enabled\n", tiny_router_buffers); return -1; } if (tiny_router_buffers > 0) nrbs = tiny_router_buffers; nrbs /= LNET_CPT_NUMBER; return max(nrbs, LNET_NRB_TINY_MIN); } static int lnet_nrb_small_calculate(int npages) { int nrbs = LNET_NRB_SMALL; if (small_router_buffers < 0) { LCONSOLE_ERROR_MSG(0x10c, "small_router_buffers=%d invalid when " "routing enabled\n", small_router_buffers); return -1; } if (small_router_buffers > 0) nrbs = small_router_buffers; nrbs /= LNET_CPT_NUMBER; return max(nrbs, LNET_NRB_SMALL_MIN); } static int lnet_nrb_large_calculate(int npages) { int nrbs = LNET_NRB_LARGE; if (large_router_buffers < 0) { LCONSOLE_ERROR_MSG(0x10c, "large_router_buffers=%d invalid when " "routing enabled\n", large_router_buffers); return -1; } if (large_router_buffers > 0) nrbs = large_router_buffers; nrbs /= LNET_CPT_NUMBER; return max(nrbs, LNET_NRB_LARGE_MIN); } int lnet_rtrpools_alloc(int im_a_router) { lnet_rtrbufpool_t *rtrp; int large_pages = (LNET_MTU + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; int small_pages = 1; int nrb_tiny; int nrb_small; int nrb_large; int rc; int i; if (!strcmp(forwarding, "")) { /* not set either way */ if (!im_a_router) return 0; } else if (!strcmp(forwarding, "disabled")) { /* explicitly disabled */ return 0; } else if (!strcmp(forwarding, "enabled")) { /* explicitly enabled */ } else { LCONSOLE_ERROR_MSG(0x10b, "'forwarding' not set to either " "'enabled' or 'disabled'\n"); return -EINVAL; } nrb_tiny = lnet_nrb_tiny_calculate(0); if (nrb_tiny < 0) return -EINVAL; nrb_small = lnet_nrb_small_calculate(small_pages); if (nrb_small < 0) return -EINVAL; nrb_large = lnet_nrb_large_calculate(large_pages); if (nrb_large < 0) return -EINVAL; the_lnet.ln_rtrpools = cfs_percpt_alloc(lnet_cpt_table(), LNET_NRBPOOLS * sizeof(lnet_rtrbufpool_t)); if (the_lnet.ln_rtrpools == NULL) { LCONSOLE_ERROR_MSG(0x10c, "Failed to initialize router buffe pool\n"); return -ENOMEM; } cfs_percpt_for_each(rtrp, i, the_lnet.ln_rtrpools) { lnet_rtrpool_init(&rtrp[0], 0); rc = lnet_rtrpool_alloc_bufs(&rtrp[0], nrb_tiny, i); if (rc != 0) goto failed; lnet_rtrpool_init(&rtrp[1], small_pages); rc = lnet_rtrpool_alloc_bufs(&rtrp[1], nrb_small, i); if (rc != 0) goto failed; lnet_rtrpool_init(&rtrp[2], large_pages); rc = lnet_rtrpool_alloc_bufs(&rtrp[2], nrb_large, i); if (rc != 0) goto failed; } lnet_net_lock(LNET_LOCK_EX); the_lnet.ln_routing = 1; lnet_net_unlock(LNET_LOCK_EX); return 0; failed: lnet_rtrpools_free(); return rc; } int lnet_notify(lnet_ni_t *ni, lnet_nid_t nid, int alive, cfs_time_t when) { struct lnet_peer *lp = NULL; cfs_time_t now = cfs_time_current(); int cpt = lnet_cpt_of_nid(nid); LASSERT (!in_interrupt ()); CDEBUG (D_NET, "%s notifying %s: %s\n", (ni == NULL) ? "userspace" : libcfs_nid2str(ni->ni_nid), libcfs_nid2str(nid), alive ? "up" : "down"); if (ni != NULL && LNET_NIDNET(ni->ni_nid) != LNET_NIDNET(nid)) { CWARN ("Ignoring notification of %s %s by %s (different net)\n", libcfs_nid2str(nid), alive ? "birth" : "death", libcfs_nid2str(ni->ni_nid)); return -EINVAL; } /* can't do predictions... */ if (cfs_time_after(when, now)) { CWARN ("Ignoring prediction from %s of %s %s " "%ld seconds in the future\n", (ni == NULL) ? "userspace" : libcfs_nid2str(ni->ni_nid), libcfs_nid2str(nid), alive ? "up" : "down", cfs_duration_sec(cfs_time_sub(when, now))); return -EINVAL; } if (ni != NULL && !alive && /* LND telling me she's down */ !auto_down) { /* auto-down disabled */ CDEBUG(D_NET, "Auto-down disabled\n"); return 0; } lnet_net_lock(cpt); if (the_lnet.ln_shutdown) { lnet_net_unlock(cpt); return -ESHUTDOWN; } lp = lnet_find_peer_locked(the_lnet.ln_peer_tables[cpt], nid); if (lp == NULL) { /* nid not found */ lnet_net_unlock(cpt); CDEBUG(D_NET, "%s not found\n", libcfs_nid2str(nid)); return 0; } /* We can't fully trust LND on reporting exact peer last_alive * if he notifies us about dead peer. For example ksocklnd can * call us with when == _time_when_the_node_was_booted_ if * no connections were successfully established */ if (ni != NULL && !alive && when < lp->lp_last_alive) when = lp->lp_last_alive; lnet_notify_locked(lp, ni == NULL, alive, when); if (ni != NULL) lnet_ni_notify_locked(ni, lp); lnet_peer_decref_locked(lp); lnet_net_unlock(cpt); return 0; } EXPORT_SYMBOL(lnet_notify); void lnet_get_tunables (void) { return; } #else int lnet_notify (lnet_ni_t *ni, lnet_nid_t nid, int alive, cfs_time_t when) { return -EOPNOTSUPP; } void lnet_router_checker (void) { static time_t last = 0; static int running = 0; time_t now = cfs_time_current_sec(); int interval = now - last; int rc; __u64 version; lnet_peer_t *rtr; /* It's no use to call me again within a sec - all intervals and * timeouts are measured in seconds */ if (last != 0 && interval < 2) return; if (last != 0 && interval > MAX(live_router_check_interval, dead_router_check_interval)) CNETERR("Checker(%d/%d) not called for %d seconds\n", live_router_check_interval, dead_router_check_interval, interval); LASSERT(LNET_CPT_NUMBER == 1); lnet_net_lock(0); LASSERT(!running); /* recursion check */ running = 1; lnet_net_unlock(0); last = now; if (the_lnet.ln_rc_state == LNET_RC_STATE_STOPPING) lnet_prune_rc_data(0); /* unlink all rcd and nowait */ /* consume all pending events */ while (1) { int i; lnet_event_t ev; /* NB ln_rc_eqh must be the 1st in 'eventqs' otherwise the * recursion breaker in LNetEQPoll would fail */ rc = LNetEQPoll(&the_lnet.ln_rc_eqh, 1, 0, &ev, &i); if (rc == 0) /* no event pending */ break; /* NB a lost SENT prevents me from pinging a router again */ if (rc == -EOVERFLOW) { CERROR("Dropped an event!!!\n"); abort(); } LASSERT (rc == 1); lnet_router_checker_event(&ev); } if (the_lnet.ln_rc_state == LNET_RC_STATE_STOPPING) { lnet_prune_rc_data(1); /* release rcd */ the_lnet.ln_rc_state = LNET_RC_STATE_SHUTDOWN; running = 0; return; } LASSERT (the_lnet.ln_rc_state == LNET_RC_STATE_RUNNING); lnet_net_lock(0); version = the_lnet.ln_routers_version; cfs_list_for_each_entry (rtr, &the_lnet.ln_routers, lp_rtr_list) { lnet_ping_router_locked(rtr); LASSERT (version == the_lnet.ln_routers_version); } lnet_net_unlock(0); running = 0; /* lock only needed for the recursion check */ return; } /* NB lnet_peers_start_down depends on me, * so must be called before any peer creation */ void lnet_get_tunables (void) { char *s; s = getenv("LNET_ROUTER_PING_TIMEOUT"); if (s != NULL) router_ping_timeout = atoi(s); s = getenv("LNET_LIVE_ROUTER_CHECK_INTERVAL"); if (s != NULL) live_router_check_interval = atoi(s); s = getenv("LNET_DEAD_ROUTER_CHECK_INTERVAL"); if (s != NULL) dead_router_check_interval = atoi(s); /* This replaces old lnd_notify mechanism */ check_routers_before_use = 1; if (dead_router_check_interval <= 0) dead_router_check_interval = 30; } void lnet_rtrpools_free(void) { } int lnet_rtrpools_alloc(int im_a_arouter) { return 0; } #endif