/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * * GPL HEADER START * * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 only, * as published by the Free Software Foundation. * * This program 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 version 2 for more details (a copy is included * in the LICENSE file that accompanied this code). * * You should have received a copy of the GNU General Public License * version 2 along with this program; If not, see * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * * GPL HEADER END */ /* * Copyright 2008 Sun Microsystems, Inc. All rights reserved * Use is subject to license terms. */ /* * This file is part of Lustre, http://www.lustre.org/ * Lustre is a trademark of Sun Microsystems, Inc. * * lustre/ptlrpc/pinger.c * * Portal-RPC reconnection and replay operations, for use in recovery. */ #ifndef __KERNEL__ #include #else #define DEBUG_SUBSYSTEM S_RPC #endif #include #include #include "ptlrpc_internal.h" struct semaphore pinger_sem; static struct list_head pinger_imports = CFS_LIST_HEAD_INIT(pinger_imports); static struct list_head timeout_list = CFS_LIST_HEAD_INIT(timeout_list); struct ptlrpc_request * ptlrpc_prep_ping(struct obd_import *imp) { struct ptlrpc_request *req; req = ptlrpc_prep_req(imp, LUSTRE_OBD_VERSION, OBD_PING, 1, NULL, NULL); if (req) { ptlrpc_req_set_repsize(req, 1, NULL); req->rq_no_resend = req->rq_no_delay = 1; } return req; } int ptlrpc_obd_ping(struct obd_device *obd) { int rc; struct ptlrpc_request *req; ENTRY; req = ptlrpc_prep_ping(obd->u.cli.cl_import); if (req == NULL) RETURN(-ENOMEM); req->rq_send_state = LUSTRE_IMP_FULL; rc = ptlrpc_queue_wait(req); ptlrpc_req_finished(req); RETURN(rc); } EXPORT_SYMBOL(ptlrpc_obd_ping); int ptlrpc_ping(struct obd_import *imp) { struct ptlrpc_request *req; int rc = 0; ENTRY; req = ptlrpc_prep_ping(imp); if (req) { DEBUG_REQ(D_INFO, req, "pinging %s->%s", imp->imp_obd->obd_uuid.uuid, obd2cli_tgt(imp->imp_obd)); /* To quickly detect server failure ping timeouts must be * kept small. Therefore we must override/ignore the server * rpc completion estimate which may be very large since * it includes non-ping service times. The right long term * fix will be to add a per-server (not per-service) thread * in order to reduce the number of pings in the system in * general (see bug 12471). */ if (!AT_OFF) { req->rq_timeout = PING_SVC_TIMEOUT + at_get(&imp->imp_at.iat_net_latency); lustre_msg_set_timeout(req->rq_reqmsg, req->rq_timeout); } ptlrpcd_add_req(req); } else { CERROR("OOM trying to ping %s->%s\n", imp->imp_obd->obd_uuid.uuid, obd2cli_tgt(imp->imp_obd)); rc = -ENOMEM; } RETURN(rc); } EXPORT_SYMBOL(ptlrpc_ping); static void ptlrpc_update_next_ping(struct obd_import *imp, int soon) { #ifdef ENABLE_PINGER cfs_time_t delay, dtime, ctime = cfs_time_current(); if (imp->imp_state == LUSTRE_IMP_DISCON || imp->imp_state == LUSTRE_IMP_CONNECTING) { /* In the disconnected case aggressively reconnect, for * this request the AT service timeout will be set to * INITIAL_CONNECT_TIMEOUT. To ensure the request times * out before we send another we add one extra second. */ dtime = cfs_time_seconds(max_t(int, CONNECTION_SWITCH_MIN, AT_OFF ? 0 : INITIAL_CONNECT_TIMEOUT + 1 + at_get(&imp->imp_at.iat_net_latency))); } else { /* In the common case we want to cluster the pings at * at regular intervals to minimize system noise. */ delay = cfs_time_seconds(soon ? PING_INTERVAL_SHORT : PING_INTERVAL); dtime = delay - (ctime % delay); } /* May harmlessly race with ptlrpc_update_next_ping() */ imp->imp_next_ping = cfs_time_add(ctime, dtime); CDEBUG(D_INFO, "Setting %s next ping to "CFS_TIME_T" ("CFS_TIME_T")\n", obd2cli_tgt(imp->imp_obd), imp->imp_next_ping, dtime); #endif /* ENABLE_PINGER */ } void ptlrpc_ping_import_soon(struct obd_import *imp) { imp->imp_next_ping = cfs_time_current(); } static inline int imp_is_deactive(struct obd_import *imp) { return (imp->imp_deactive || OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_IMP_DEACTIVE)); } cfs_duration_t pinger_check_timeout(cfs_time_t time) { struct timeout_item *item; cfs_time_t timeout = PING_INTERVAL; /* The timeout list is a increase order sorted list */ mutex_down(&pinger_sem); list_for_each_entry(item, &timeout_list, ti_chain) { int ti_timeout = item->ti_timeout; if (timeout > ti_timeout) timeout = ti_timeout; break; } mutex_up(&pinger_sem); return cfs_time_sub(cfs_time_add(time, cfs_time_seconds(timeout)), cfs_time_current()); } #ifdef __KERNEL__ static int ptlrpc_pinger_main(void *arg) { struct ptlrpc_svc_data *data = (struct ptlrpc_svc_data *)arg; struct ptlrpc_thread *thread = data->thread; ENTRY; cfs_daemonize(data->name); /* Record that the thread is running */ thread->t_flags = SVC_RUNNING; cfs_waitq_signal(&thread->t_ctl_waitq); /* And now, loop forever, pinging as needed. */ while (1) { cfs_time_t this_ping = cfs_time_current(); struct l_wait_info lwi; cfs_duration_t time_to_next_wake; cfs_time_t time_of_next_wake; struct timeout_item *item; struct list_head *iter; time_to_next_wake = cfs_time_seconds(PING_INTERVAL); time_of_next_wake = cfs_time_shift(PING_INTERVAL); mutex_down(&pinger_sem); list_for_each_entry(item, &timeout_list, ti_chain) { item->ti_cb(item, item->ti_cb_data); } list_for_each(iter, &pinger_imports) { struct obd_import *imp = list_entry(iter, struct obd_import, imp_pinger_chain); int force, level; spin_lock(&imp->imp_lock); level = imp->imp_state; force = imp->imp_force_verify; imp->imp_force_verify = 0; spin_unlock(&imp->imp_lock); CDEBUG(level == LUSTRE_IMP_FULL ? D_INFO : D_RPCTRACE, "level %s/%u force %u deactive %u pingable %u\n", ptlrpc_import_state_name(level), level, force, imp->imp_deactive, imp->imp_pingable); /* Include any ping which misses the deadline by up to * 1/10 of a second. The pings are designed to clump * and this helps ensure the entire batch gets sent * promptly, which minimizes system noise from pings */ if (force || cfs_time_aftereq(this_ping, imp->imp_next_ping - (cfs_time_seconds(1) + 9) / 10)) { if (level == LUSTRE_IMP_DISCON && !imp_is_deactive(imp)) { ptlrpc_update_next_ping(imp, 0); ptlrpc_initiate_recovery(imp); } else if (level != LUSTRE_IMP_FULL || imp->imp_obd->obd_no_recov || imp_is_deactive(imp)) { CDEBUG(D_HA, "not pinging %s " "(in recovery: %s or recovery " "disabled: %u/%u)\n", obd2cli_tgt(imp->imp_obd), ptlrpc_import_state_name(level), imp->imp_deactive, imp->imp_obd->obd_no_recov); } else if (imp->imp_pingable || force) { ptlrpc_ping(imp); /* ptlrpc_pinger_sending_on_import() * will asynch update imp_next_ping * so it must not be used below to * calculate minimum wait time. */ continue; } } else { if (!imp->imp_pingable) continue; CDEBUG(D_INFO, "don't need to ping %s ("CFS_TIME_T " > "CFS_TIME_T")\n", obd2cli_tgt(imp->imp_obd), imp->imp_next_ping, this_ping); } /* Wait time until next ping, or until we stopped. */ if (cfs_time_before(imp->imp_next_ping, time_of_next_wake)) { time_of_next_wake = imp->imp_next_ping; time_to_next_wake = max_t(cfs_duration_t, cfs_time_seconds(1), cfs_time_sub(time_of_next_wake, cfs_time_current())); } } mutex_up(&pinger_sem); obd_update_maxusage(); CDEBUG(D_INFO, "next ping in "CFS_DURATION_T" ("CFS_TIME_T")\n", time_to_next_wake, time_of_next_wake); if (time_to_next_wake > 0) { lwi = LWI_TIMEOUT(time_to_next_wake, NULL, NULL); l_wait_event(thread->t_ctl_waitq, thread->t_flags & (SVC_STOPPING|SVC_EVENT), &lwi); if (thread->t_flags & SVC_STOPPING) { thread->t_flags &= ~SVC_STOPPING; EXIT; break; } else if (thread->t_flags & SVC_EVENT) { /* woken after adding import to reset timer */ thread->t_flags &= ~SVC_EVENT; } } } thread->t_flags = SVC_STOPPED; cfs_waitq_signal(&thread->t_ctl_waitq); CDEBUG(D_NET, "pinger thread exiting, process %d\n", cfs_curproc_pid()); return 0; } static struct ptlrpc_thread *pinger_thread = NULL; int ptlrpc_start_pinger(void) { struct l_wait_info lwi = { 0 }; struct ptlrpc_svc_data d; int rc; #ifndef ENABLE_PINGER return 0; #endif ENTRY; if (pinger_thread != NULL) RETURN(-EALREADY); OBD_ALLOC(pinger_thread, sizeof(*pinger_thread)); if (pinger_thread == NULL) RETURN(-ENOMEM); cfs_waitq_init(&pinger_thread->t_ctl_waitq); d.name = "ll_ping"; d.thread = pinger_thread; /* CLONE_VM and CLONE_FILES just avoid a needless copy, because we * just drop the VM and FILES in cfs_daemonize_ctxt() right away. */ rc = cfs_kernel_thread(ptlrpc_pinger_main, &d, CLONE_VM | CLONE_FILES); if (rc < 0) { CERROR("cannot start thread: %d\n", rc); OBD_FREE(pinger_thread, sizeof(*pinger_thread)); pinger_thread = NULL; RETURN(rc); } l_wait_event(pinger_thread->t_ctl_waitq, pinger_thread->t_flags & SVC_RUNNING, &lwi); RETURN(0); } int ptlrpc_pinger_remove_timeouts(void); int ptlrpc_stop_pinger(void) { struct l_wait_info lwi = { 0 }; int rc = 0; #ifndef ENABLE_PINGER return 0; #endif ENTRY; if (pinger_thread == NULL) RETURN(-EALREADY); ptlrpc_pinger_remove_timeouts(); mutex_down(&pinger_sem); pinger_thread->t_flags = SVC_STOPPING; cfs_waitq_signal(&pinger_thread->t_ctl_waitq); mutex_up(&pinger_sem); l_wait_event(pinger_thread->t_ctl_waitq, (pinger_thread->t_flags & SVC_STOPPED), &lwi); OBD_FREE(pinger_thread, sizeof(*pinger_thread)); pinger_thread = NULL; RETURN(rc); } void ptlrpc_pinger_sending_on_import(struct obd_import *imp) { ptlrpc_update_next_ping(imp, 0); } void ptlrpc_pinger_commit_expected(struct obd_import *imp) { ptlrpc_update_next_ping(imp, 1); } int ptlrpc_pinger_add_import(struct obd_import *imp) { ENTRY; if (!list_empty(&imp->imp_pinger_chain)) RETURN(-EALREADY); mutex_down(&pinger_sem); CDEBUG(D_HA, "adding pingable import %s->%s\n", imp->imp_obd->obd_uuid.uuid, obd2cli_tgt(imp->imp_obd)); /* if we add to pinger we want recovery on this import */ imp->imp_obd->obd_no_recov = 0; ptlrpc_update_next_ping(imp, 0); /* XXX sort, blah blah */ list_add_tail(&imp->imp_pinger_chain, &pinger_imports); class_import_get(imp); ptlrpc_pinger_wake_up(); mutex_up(&pinger_sem); RETURN(0); } int ptlrpc_pinger_del_import(struct obd_import *imp) { ENTRY; if (list_empty(&imp->imp_pinger_chain)) RETURN(-ENOENT); mutex_down(&pinger_sem); list_del_init(&imp->imp_pinger_chain); CDEBUG(D_HA, "removing pingable import %s->%s\n", imp->imp_obd->obd_uuid.uuid, obd2cli_tgt(imp->imp_obd)); /* if we remove from pinger we don't want recovery on this import */ imp->imp_obd->obd_no_recov = 1; class_import_put(imp); mutex_up(&pinger_sem); RETURN(0); } /** * Register a timeout callback to the pinger list, and the callback will * be called when timeout happens. */ struct timeout_item* ptlrpc_new_timeout(int time, enum timeout_event event, timeout_cb_t cb, void *data) { struct timeout_item *ti; OBD_ALLOC_PTR(ti); if (!ti) return(NULL); CFS_INIT_LIST_HEAD(&ti->ti_obd_list); CFS_INIT_LIST_HEAD(&ti->ti_chain); ti->ti_timeout = time; ti->ti_event = event; ti->ti_cb = cb; ti->ti_cb_data = data; return ti; } /** * Register timeout event on the the pinger thread. * Note: the timeout list is an sorted list with increased timeout value. */ static struct timeout_item* ptlrpc_pinger_register_timeout(int time, enum timeout_event event, timeout_cb_t cb, void *data) { struct timeout_item *item, *tmp; LASSERT_SEM_LOCKED(&pinger_sem); list_for_each_entry(item, &timeout_list, ti_chain) if (item->ti_event == event) goto out; item = ptlrpc_new_timeout(time, event, cb, data); if (item) { list_for_each_entry_reverse(tmp, &timeout_list, ti_chain) { if (tmp->ti_timeout < time) { list_add(&item->ti_chain, &tmp->ti_chain); goto out; } } list_add(&item->ti_chain, &timeout_list); } out: return item; } /* Add a client_obd to the timeout event list, when timeout(@time) * happens, the callback(@cb) will be called. */ int ptlrpc_add_timeout_client(int time, enum timeout_event event, timeout_cb_t cb, void *data, struct list_head *obd_list) { struct timeout_item *ti; mutex_down(&pinger_sem); ti = ptlrpc_pinger_register_timeout(time, event, cb, data); if (!ti) { mutex_up(&pinger_sem); return (-EINVAL); } list_add(obd_list, &ti->ti_obd_list); mutex_up(&pinger_sem); return 0; } int ptlrpc_del_timeout_client(struct list_head *obd_list, enum timeout_event event) { struct timeout_item *ti = NULL, *item; if (list_empty(obd_list)) return 0; mutex_down(&pinger_sem); list_del_init(obd_list); /** * If there are no obd attached to the timeout event * list, remove this timeout event from the pinger */ list_for_each_entry(item, &timeout_list, ti_chain) { if (item->ti_event == event) { ti = item; break; } } LASSERTF(ti != NULL, "ti is NULL ! \n"); if (list_empty(&ti->ti_obd_list)) { list_del(&ti->ti_chain); OBD_FREE_PTR(ti); } mutex_up(&pinger_sem); return 0; } int ptlrpc_pinger_remove_timeouts(void) { struct timeout_item *item, *tmp; mutex_down(&pinger_sem); list_for_each_entry_safe(item, tmp, &timeout_list, ti_chain) { LASSERT(list_empty(&item->ti_obd_list)); list_del(&item->ti_chain); OBD_FREE_PTR(item); } mutex_up(&pinger_sem); return 0; } void ptlrpc_pinger_wake_up() { #ifdef ENABLE_PINGER pinger_thread->t_flags |= SVC_EVENT; cfs_waitq_signal(&pinger_thread->t_ctl_waitq); #endif } /* Ping evictor thread */ #define PET_READY 1 #define PET_TERMINATE 2 static int pet_refcount = 0; static int pet_state; static wait_queue_head_t pet_waitq; static struct obd_export *pet_exp = NULL; static spinlock_t pet_lock = SPIN_LOCK_UNLOCKED; int ping_evictor_wake(struct obd_export *exp) { spin_lock(&pet_lock); if (pet_exp || (pet_state != PET_READY)) { /* eventually the new obd will call here again. */ spin_unlock(&pet_lock); return 1; } /* We have to make sure the obd isn't destroyed between now and when * the ping evictor runs. We'll take a reference here, and drop it * when we finish in the evictor. We don't really care about this * export in particular; we just need one to keep the obd alive. */ pet_exp = class_export_get(exp); spin_unlock(&pet_lock); wake_up(&pet_waitq); return 0; } static int ping_evictor_main(void *arg) { struct obd_device *obd; struct obd_export *exp; struct l_wait_info lwi = { 0 }; time_t expire_time; ENTRY; cfs_daemonize_ctxt("ll_evictor"); CDEBUG(D_HA, "Starting Ping Evictor\n"); pet_exp = NULL; pet_state = PET_READY; while (1) { l_wait_event(pet_waitq, pet_exp || (pet_state == PET_TERMINATE), &lwi); if (pet_state == PET_TERMINATE) break; /* we only get here if pet_exp != NULL, and the end of this * loop is the only place which sets it NULL again, so lock * is not strictly necessary. */ spin_lock(&pet_lock); obd = pet_exp->exp_obd; spin_unlock(&pet_lock); expire_time = cfs_time_current_sec() - PING_EVICT_TIMEOUT; CDEBUG(D_HA, "evicting all exports of obd %s older than %ld\n", obd->obd_name, expire_time); /* Exports can't be deleted out of the list while we hold * the obd lock (class_unlink_export), which means we can't * lose the last ref on the export. If they've already been * removed from the list, we won't find them here. */ spin_lock(&obd->obd_dev_lock); while (!list_empty(&obd->obd_exports_timed)) { exp = list_entry(obd->obd_exports_timed.next, struct obd_export,exp_obd_chain_timed); if (expire_time > exp->exp_last_request_time) { class_export_get(exp); spin_unlock(&obd->obd_dev_lock); LCONSOLE_WARN("%s: haven't heard from client %s" " (at %s) in %ld seconds. I think" " it's dead, and I am evicting" " it.\n", obd->obd_name, obd_uuid2str(&exp->exp_client_uuid), obd_export_nid2str(exp), (long)(cfs_time_current_sec() - exp->exp_last_request_time)); CDEBUG(D_HA, "Last request was at %ld\n", exp->exp_last_request_time); class_fail_export(exp); class_export_put(exp); spin_lock(&obd->obd_dev_lock); } else { /* List is sorted, so everyone below is ok */ break; } } spin_unlock(&obd->obd_dev_lock); class_export_put(pet_exp); spin_lock(&pet_lock); pet_exp = NULL; spin_unlock(&pet_lock); } CDEBUG(D_HA, "Exiting Ping Evictor\n"); RETURN(0); } void ping_evictor_start(void) { int rc; if (++pet_refcount > 1) return; init_waitqueue_head(&pet_waitq); rc = cfs_kernel_thread(ping_evictor_main, NULL, CLONE_VM | CLONE_FILES); if (rc < 0) { pet_refcount--; CERROR("Cannot start ping evictor thread: %d\n", rc); } } EXPORT_SYMBOL(ping_evictor_start); void ping_evictor_stop(void) { if (--pet_refcount > 0) return; pet_state = PET_TERMINATE; wake_up(&pet_waitq); } EXPORT_SYMBOL(ping_evictor_stop); #else /* !__KERNEL__ */ /* XXX * the current implementation of pinger in liblustre is not optimized */ #ifdef ENABLE_PINGER static struct pinger_data { int pd_recursion; cfs_time_t pd_this_ping; /* jiffies */ cfs_time_t pd_next_ping; /* jiffies */ struct ptlrpc_request_set *pd_set; } pinger_args; static int pinger_check_rpcs(void *arg) { cfs_time_t curtime = cfs_time_current(); struct ptlrpc_request *req; struct ptlrpc_request_set *set; struct list_head *iter; struct obd_import *imp; struct pinger_data *pd = &pinger_args; int rc; /* prevent recursion */ if (pd->pd_recursion++) { CDEBUG(D_HA, "pinger: recursion! quit\n"); LASSERT(pd->pd_set); pd->pd_recursion--; return 0; } /* have we reached ping point? */ if (!pd->pd_set && time_before(curtime, pd->pd_next_ping)) { pd->pd_recursion--; return 0; } /* if we have rpc_set already, continue processing it */ if (pd->pd_set) { LASSERT(pd->pd_this_ping); set = pd->pd_set; goto do_check_set; } pd->pd_this_ping = curtime; pd->pd_set = ptlrpc_prep_set(); if (pd->pd_set == NULL) goto out; set = pd->pd_set; /* add rpcs into set */ mutex_down(&pinger_sem); list_for_each(iter, &pinger_imports) { struct obd_import *imp = list_entry(iter, struct obd_import, imp_pinger_chain); int generation, level; /* Include any ping within 1/10 of a second of the deadline */ if (cfs_time_aftereq(pd->pd_this_ping, imp->imp_next_ping - (cfs_time_seconds(1) + 9) / 10)) { /* Add a ping. */ spin_lock(&imp->imp_lock); generation = imp->imp_generation; level = imp->imp_state; spin_unlock(&imp->imp_lock); if (level != LUSTRE_IMP_FULL) { CDEBUG(D_HA, "not pinging %s (in recovery)\n", obd2cli_tgt(imp->imp_obd)); continue; } req = ptlrpc_prep_req(imp, LUSTRE_OBD_VERSION, OBD_PING, 1, NULL, NULL); if (!req) { CERROR("out of memory\n"); break; } req->rq_no_resend = 1; ptlrpc_req_set_repsize(req, 1, NULL); req->rq_send_state = LUSTRE_IMP_FULL; ptlrpc_rqphase_move(req, RQ_PHASE_RPC); req->rq_import_generation = generation; ptlrpc_set_add_req(set, req); } else { CDEBUG(D_INFO, "don't need to ping %s ("CFS_TIME_T " > "CFS_TIME_T")\n", obd2cli_tgt(imp->imp_obd), imp->imp_next_ping, pd->pd_this_ping); } } pd->pd_this_ping = curtime; mutex_up(&pinger_sem); /* Might be empty, that's OK. */ if (set->set_remaining == 0) CDEBUG(D_RPCTRACE, "nothing to ping\n"); list_for_each(iter, &set->set_requests) { struct ptlrpc_request *req = list_entry(iter, struct ptlrpc_request, rq_set_chain); DEBUG_REQ(D_RPCTRACE, req, "pinging %s->%s", req->rq_import->imp_obd->obd_uuid.uuid, obd2cli_tgt(req->rq_import->imp_obd)); (void)ptl_send_rpc(req, 0); } do_check_set: rc = ptlrpc_check_set(set); /* not finished, and we are not expired, simply return */ if (!rc && cfs_time_before(curtime, cfs_time_add(pd->pd_this_ping, cfs_time_seconds(PING_INTERVAL)))) { CDEBUG(D_RPCTRACE, "not finished, but also not expired\n"); pd->pd_recursion--; return 0; } /* Expire all the requests that didn't come back. */ mutex_down(&pinger_sem); list_for_each(iter, &set->set_requests) { req = list_entry(iter, struct ptlrpc_request, rq_set_chain); if (req->rq_phase == RQ_PHASE_COMPLETE) continue; CDEBUG(D_RPCTRACE, "Pinger initiate expire request(%p)\n", req); /* This will also unregister reply. */ ptlrpc_expire_one_request(req, 0); /* We're done with this req, let's finally move it to complete * phase and take care of inflights. */ ptlrpc_rqphase_move(req, RQ_PHASE_COMPLETE); imp = req->rq_import; spin_lock(&imp->imp_lock); if (!list_empty(&req->rq_list)) { list_del_init(&req->rq_list); atomic_dec(&imp->imp_inflight); } spin_unlock(&imp->imp_lock); set->set_remaining--; } mutex_up(&pinger_sem); ptlrpc_set_destroy(set); pd->pd_set = NULL; out: pd->pd_next_ping = cfs_time_add(pd->pd_this_ping, cfs_time_seconds(PING_INTERVAL)); pd->pd_this_ping = 0; /* XXX for debug */ CDEBUG(D_INFO, "finished a round ping\n"); pd->pd_recursion--; return 0; } static void *pinger_callback = NULL; #endif /* ENABLE_PINGER */ int ptlrpc_start_pinger(void) { #ifdef ENABLE_PINGER memset(&pinger_args, 0, sizeof(pinger_args)); pinger_callback = liblustre_register_wait_callback("pinger_check_rpcs", &pinger_check_rpcs, &pinger_args); #endif return 0; } int ptlrpc_stop_pinger(void) { #ifdef ENABLE_PINGER if (pinger_callback) liblustre_deregister_wait_callback(pinger_callback); #endif return 0; } void ptlrpc_pinger_sending_on_import(struct obd_import *imp) { #ifdef ENABLE_PINGER mutex_down(&pinger_sem); ptlrpc_update_next_ping(imp, 0); if (pinger_args.pd_set == NULL && time_before(imp->imp_next_ping, pinger_args.pd_next_ping)) { CDEBUG(D_HA, "set next ping to "CFS_TIME_T"(cur "CFS_TIME_T")\n", imp->imp_next_ping, cfs_time_current()); pinger_args.pd_next_ping = imp->imp_next_ping; } mutex_up(&pinger_sem); #endif } int ptlrpc_add_timeout_client(int time, enum timeout_event event, timeout_cb_t cb, void *data, struct list_head *obd_list) { return 0; } int ptlrpc_del_timeout_client(struct list_head *obd_list, enum timeout_event event) { return 0; } int ptlrpc_pinger_add_import(struct obd_import *imp) { ENTRY; if (!list_empty(&imp->imp_pinger_chain)) RETURN(-EALREADY); CDEBUG(D_HA, "adding pingable import %s->%s\n", imp->imp_obd->obd_uuid.uuid, obd2cli_tgt(imp->imp_obd)); ptlrpc_pinger_sending_on_import(imp); mutex_down(&pinger_sem); list_add_tail(&imp->imp_pinger_chain, &pinger_imports); class_import_get(imp); mutex_up(&pinger_sem); RETURN(0); } int ptlrpc_pinger_del_import(struct obd_import *imp) { ENTRY; if (list_empty(&imp->imp_pinger_chain)) RETURN(-ENOENT); mutex_down(&pinger_sem); list_del_init(&imp->imp_pinger_chain); CDEBUG(D_HA, "removing pingable import %s->%s\n", imp->imp_obd->obd_uuid.uuid, obd2cli_tgt(imp->imp_obd)); class_import_put(imp); mutex_up(&pinger_sem); RETURN(0); } void ptlrpc_pinger_wake_up() { #ifdef ENABLE_PINGER ENTRY; /* XXX force pinger to run, if needed */ struct obd_import *imp; list_for_each_entry(imp, &pinger_imports, imp_pinger_chain) { CDEBUG(D_RPCTRACE, "checking import %s->%s\n", imp->imp_obd->obd_uuid.uuid, obd2cli_tgt(imp->imp_obd)); #ifdef ENABLE_LIBLUSTRE_RECOVERY if (imp->imp_state == LUSTRE_IMP_DISCON && !imp_is_deactive(imp)) #else /*XXX only recover for the initial connection */ if (!lustre_handle_is_used(&imp->imp_remote_handle) && imp->imp_state == LUSTRE_IMP_DISCON && !imp_is_deactive(imp)) #endif ptlrpc_initiate_recovery(imp); else if (imp->imp_state != LUSTRE_IMP_FULL) CDEBUG(D_HA, "Refused to recover import %s->%s " "state %d, deactive %d\n", imp->imp_obd->obd_uuid.uuid, obd2cli_tgt(imp->imp_obd), imp->imp_state, imp_is_deactive(imp)); } #endif EXIT; } #endif /* !__KERNEL__ */