X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lustre%2Fptlrpc%2Fpinger.c;h=672476229c1a1b06d35c50d711319cfdd969cc39;hp=68912f75673a9b92aad78e6749e8765aa862361c;hb=a6527b28ba2082a445fbf584909a7791ce407ef3;hpb=c5cb8238da8e8c07a41f32f7145bd9ddd5361f5d diff --git a/lustre/ptlrpc/pinger.c b/lustre/ptlrpc/pinger.c index 68912f7..6724762 100644 --- a/lustre/ptlrpc/pinger.c +++ b/lustre/ptlrpc/pinger.c @@ -1,104 +1,207 @@ /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * - * Portal-RPC reconnection and replay operations, for use in recovery. + * GPL HEADER START + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * - * Copyright (c) 2003 Cluster File Systems, Inc. - * Authors: Phil Schwan - * Mike Shaver + * 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 file is part of Lustre, http://www.lustre.org. + * 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). * - * Lustre 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. + * 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 * - * Lustre 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. + * 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. * - * You should have received a copy of the GNU General Public License - * along with Lustre; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * GPL HEADER END + */ +/* + * Copyright (c) 2003, 2010, Oracle and/or its affiliates. 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 -#include -#include #define DEBUG_SUBSYSTEM S_RPC #endif -#include -#include +#include +#include #include "ptlrpc_internal.h" -#define PINGER_RATE 3 /* how many pings we'll do in obd_timeout period */ +cfs_semaphore_t pinger_sem; +static CFS_LIST_HEAD(pinger_imports); +static cfs_list_t timeout_list = CFS_LIST_HEAD_INIT(timeout_list); +struct ptlrpc_request * +ptlrpc_prep_ping(struct obd_import *imp) +{ + struct ptlrpc_request *req; -static DECLARE_MUTEX(pinger_sem); -static struct list_head pinger_imports = LIST_HEAD_INIT(pinger_imports); + req = ptlrpc_request_alloc_pack(imp, &RQF_OBD_PING, + LUSTRE_OBD_VERSION, OBD_PING); + if (req) { + ptlrpc_request_set_replen(req); + req->rq_no_resend = req->rq_no_delay = 1; + } + return req; +} -int ptlrpc_ping(struct obd_import *imp) +int ptlrpc_obd_ping(struct obd_device *obd) { + int rc; struct ptlrpc_request *req; - int rc = 0; ENTRY; - req = ptlrpc_prep_req(imp, LUSTRE_OBD_VERSION, OBD_PING, 0, NULL, NULL); - if (req) { - DEBUG_REQ(D_HA, req, "pinging %s->%s", - imp->imp_obd->obd_uuid.uuid, - imp->imp_target_uuid.uuid); - req->rq_no_resend = req->rq_no_delay = 1; - req->rq_replen = lustre_msg_size(0, NULL); - req->rq_timeout = obd_timeout / PINGER_RATE; - ptlrpcd_add_req(req); - } else { + 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; + ENTRY; + + req = ptlrpc_prep_ping(imp); + if (req == NULL) { CERROR("OOM trying to ping %s->%s\n", imp->imp_obd->obd_uuid.uuid, - imp->imp_target_uuid.uuid); - rc = -ENOMEM; + obd2cli_tgt(imp->imp_obd)); + RETURN(-ENOMEM); } - RETURN(rc); + DEBUG_REQ(D_INFO, req, "pinging %s->%s", + imp->imp_obd->obd_uuid.uuid, obd2cli_tgt(imp->imp_obd)); + ptlrpcd_add_req(req, PSCOPE_OTHER); + + RETURN(0); } -#ifdef __KERNEL__ -static inline int ptlrpc_next_ping(struct obd_import *imp) +void ptlrpc_update_next_ping(struct obd_import *imp, int soon) { - return jiffies + (obd_timeout / PINGER_RATE * HZ); +#ifdef ENABLE_PINGER + int time = soon ? PING_INTERVAL_SHORT : PING_INTERVAL; + if (imp->imp_state == LUSTRE_IMP_DISCON) { + int dtime = max_t(int, CONNECTION_SWITCH_MIN, + AT_OFF ? 0 : + at_get(&imp->imp_at.iat_net_latency)); + time = min(time, dtime); + } + imp->imp_next_ping = cfs_time_shift(time); +#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)); } static inline int ptlrpc_next_reconnect(struct obd_import *imp) { if (imp->imp_server_timeout) - return jiffies + (obd_timeout / 2 * HZ); + return cfs_time_shift(obd_timeout / 2); else - return jiffies + (obd_timeout * HZ); + return cfs_time_shift(obd_timeout); +} + +static cfs_atomic_t suspend_timeouts = CFS_ATOMIC_INIT(0); +static cfs_time_t suspend_wakeup_time = 0; + +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 */ + cfs_mutex_down(&pinger_sem); + cfs_list_for_each_entry(item, &timeout_list, ti_chain) { + int ti_timeout = item->ti_timeout; + if (timeout > ti_timeout) + timeout = ti_timeout; + break; + } + cfs_mutex_up(&pinger_sem); + + return cfs_time_sub(cfs_time_add(time, cfs_time_seconds(timeout)), + cfs_time_current()); } -static atomic_t suspend_timeouts = ATOMIC_INIT(0); -static wait_queue_head_t suspend_timeouts_waitq; +#ifdef __KERNEL__ +static cfs_waitq_t suspend_timeouts_waitq; +#endif + +cfs_time_t ptlrpc_suspend_wakeup_time(void) +{ + return suspend_wakeup_time; +} -void ptlrpc_deactivate_timeouts(void) +void ptlrpc_deactivate_timeouts(struct obd_import *imp) { - CDEBUG(D_HA, "deactivate timeouts\n"); - atomic_inc(&suspend_timeouts); + /*XXX: disabled for now, will be replaced by adaptive timeouts */ +#if 0 + if (imp->imp_no_timeout) + return; + imp->imp_no_timeout = 1; + cfs_atomic_inc(&suspend_timeouts); + CDEBUG(D_HA|D_WARNING, "deactivate timeouts %u\n", + cfs_atomic_read(&suspend_timeouts)); +#endif } - -void ptlrpc_activate_timeouts(void) + +void ptlrpc_activate_timeouts(struct obd_import *imp) { - CDEBUG(D_HA, "activate timeouts\n"); - LASSERT(atomic_read(&suspend_timeouts) > 0); - if (atomic_dec_and_test(&suspend_timeouts)) - wake_up(&suspend_timeouts_waitq); + /*XXX: disabled for now, will be replaced by adaptive timeouts */ +#if 0 + if (!imp->imp_no_timeout) + return; + imp->imp_no_timeout = 0; + LASSERT(cfs_atomic_read(&suspend_timeouts) > 0); + if (cfs_atomic_dec_and_test(&suspend_timeouts)) { + suspend_wakeup_time = cfs_time_current(); + cfs_waitq_signal(&suspend_timeouts_waitq); + } + CDEBUG(D_HA|D_WARNING, "activate timeouts %u\n", + cfs_atomic_read(&suspend_timeouts)); +#endif } int ptlrpc_check_suspend(void) { - if (atomic_read(&suspend_timeouts)) + if (cfs_atomic_read(&suspend_timeouts)) return 1; return 0; } @@ -107,51 +210,53 @@ int ptlrpc_check_and_wait_suspend(struct ptlrpc_request *req) { struct l_wait_info lwi; - if (atomic_read(&suspend_timeouts)) { + if (cfs_atomic_read(&suspend_timeouts)) { DEBUG_REQ(D_NET, req, "-- suspend %d regular timeout", - atomic_read(&suspend_timeouts)); + cfs_atomic_read(&suspend_timeouts)); lwi = LWI_INTR(NULL, NULL); l_wait_event(suspend_timeouts_waitq, - atomic_read(&suspend_timeouts) == 0, &lwi); + cfs_atomic_read(&suspend_timeouts) == 0, &lwi); DEBUG_REQ(D_NET, req, "-- recharge regular timeout"); return 1; } return 0; } +#ifdef __KERNEL__ + static void ptlrpc_pinger_process_import(struct obd_import *imp, unsigned long this_ping) { - unsigned long flags; int force, level; - spin_lock_irqsave(&imp->imp_lock, flags); + cfs_spin_lock(&imp->imp_lock); level = imp->imp_state; force = imp->imp_force_verify; if (force) imp->imp_force_verify = 0; - spin_unlock_irqrestore(&imp->imp_lock, flags); + cfs_spin_unlock(&imp->imp_lock); - if (imp->imp_next_ping - this_ping > obd_timeout) { - CWARN("wrong ping time %lu (current %lu)\n", - imp->imp_next_ping, this_ping); - imp->imp_next_ping = ptlrpc_next_reconnect(imp); - } + CDEBUG(level == LUSTRE_IMP_FULL ? D_INFO : D_HA, + "level %s/%u force %u deactive %u pingable %u\n", + ptlrpc_import_state_name(level), level, + force, imp->imp_deactive, imp->imp_pingable); - if (imp->imp_next_ping > this_ping && force == 0) + if (cfs_time_aftereq(imp->imp_next_ping - 5 * CFS_TICK, + this_ping) && force == 0) return; - if (level == LUSTRE_IMP_DISCON && !imp->imp_deactive) { + if (level == LUSTRE_IMP_DISCON && !imp_is_deactive(imp)) { /* wait at least a timeout before trying recovery again */ imp->imp_next_ping = ptlrpc_next_reconnect(imp); ptlrpc_initiate_recovery(imp); - } else if (level != LUSTRE_IMP_FULL || imp->imp_obd->obd_no_recov) { + } else if (level != LUSTRE_IMP_FULL || + imp->imp_obd->obd_no_recov || + imp_is_deactive(imp)) { CDEBUG(D_HA, "not pinging %s (in recovery " " or recovery disabled: %s)\n", - imp->imp_target_uuid.uuid, + obd2cli_tgt(imp->imp_obd), ptlrpc_import_state_name(level)); } else if (imp->imp_pingable || force) { - imp->imp_next_ping = ptlrpc_next_ping(imp); ptlrpc_ping(imp); } } @@ -160,60 +265,57 @@ static int ptlrpc_pinger_main(void *arg) { struct ptlrpc_svc_data *data = (struct ptlrpc_svc_data *)arg; struct ptlrpc_thread *thread = data->thread; - unsigned long flags; ENTRY; - lock_kernel(); - ptlrpc_daemonize(); - - SIGNAL_MASK_LOCK(current, flags); - sigfillset(¤t->blocked); - RECALC_SIGPENDING; - SIGNAL_MASK_UNLOCK(current, flags); - - LASSERTF(strlen(data->name) < sizeof(current->comm), - "name %d > len %d\n", - (int)strlen(data->name), (int)sizeof(current->comm)); - THREAD_NAME(current->comm, sizeof(current->comm) - 1, "%s", data->name); - unlock_kernel(); + cfs_daemonize(data->name); /* Record that the thread is running */ thread->t_flags = SVC_RUNNING; - wake_up(&thread->t_ctl_waitq); + cfs_waitq_signal(&thread->t_ctl_waitq); /* And now, loop forever, pinging as needed. */ while (1) { - unsigned long this_ping = jiffies; - long time_to_next_ping; - struct l_wait_info lwi = LWI_TIMEOUT(obd_timeout * HZ, - NULL, NULL); - struct list_head *iter; - - time_to_next_ping = this_ping + (obd_timeout * HZ) - jiffies; - down(&pinger_sem); - list_for_each(iter, &pinger_imports) { + cfs_time_t this_ping = cfs_time_current(); + struct l_wait_info lwi; + cfs_duration_t time_to_next_wake; + struct timeout_item *item; + cfs_list_t *iter; + + cfs_mutex_down(&pinger_sem); + cfs_list_for_each_entry(item, &timeout_list, ti_chain) { + item->ti_cb(item, item->ti_cb_data); + } + cfs_list_for_each(iter, &pinger_imports) { struct obd_import *imp = - list_entry(iter, struct obd_import, - imp_pinger_chain); + cfs_list_entry(iter, struct obd_import, + imp_pinger_chain); ptlrpc_pinger_process_import(imp, this_ping); - - CDEBUG(D_OTHER, "%s: pingable %d, next_ping %lu(%lu)\n", - imp->imp_target_uuid.uuid, - imp->imp_pingable, imp->imp_next_ping, jiffies); - + /* obd_timeout might have changed */ if (imp->imp_pingable && imp->imp_next_ping && - imp->imp_next_ping - jiffies < time_to_next_ping && - imp->imp_next_ping > jiffies) - time_to_next_ping = imp->imp_next_ping - jiffies; + cfs_time_after(imp->imp_next_ping, + cfs_time_add(this_ping, + cfs_time_seconds(PING_INTERVAL)))) + ptlrpc_update_next_ping(imp, 0); } - up(&pinger_sem); + cfs_mutex_up(&pinger_sem); + /* update memory usage info */ + obd_update_maxusage(); /* Wait until the next ping time, or until we're stopped. */ - CDEBUG(D_HA, "next ping in %lu (%lu)\n", time_to_next_ping, - this_ping + (obd_timeout * HZ)); - if (time_to_next_ping > 0) { - lwi = LWI_TIMEOUT(time_to_next_ping, NULL, NULL); + time_to_next_wake = pinger_check_timeout(this_ping); + /* The ping sent by ptlrpc_send_rpc may get sent out + say .01 second after this. + ptlrpc_pinger_sending_on_import will then set the + next ping time to next_ping + .01 sec, which means + we will SKIP the next ping at next_ping, and the + ping will get sent 2 timeouts from now! Beware. */ + CDEBUG(D_INFO, "next wakeup in "CFS_DURATION_T" ("CFS_TIME_T")\n", + time_to_next_wake, + cfs_time_add(this_ping, cfs_time_seconds(PING_INTERVAL))); + if (time_to_next_wake > 0) { + lwi = LWI_TIMEOUT(max_t(cfs_duration_t, time_to_next_wake, cfs_time_seconds(1)), + NULL, NULL); l_wait_event(thread->t_ctl_waitq, thread->t_flags & (SVC_STOPPING|SVC_EVENT), &lwi); @@ -229,9 +331,9 @@ static int ptlrpc_pinger_main(void *arg) } thread->t_flags = SVC_STOPPED; - wake_up(&thread->t_ctl_waitq); + cfs_waitq_signal(&thread->t_ctl_waitq); - CDEBUG(D_NET, "pinger thread exiting, process %d\n", current->pid); + CDEBUG(D_NET, "pinger thread exiting, process %d\n", cfs_curproc_pid()); return 0; } @@ -247,34 +349,35 @@ int ptlrpc_start_pinger(void) #endif ENTRY; - LASSERT(obd_timeout > PINGER_RATE); - if (pinger_thread != NULL) RETURN(-EALREADY); - OBD_ALLOC(pinger_thread, sizeof(*pinger_thread)); + OBD_ALLOC_PTR(pinger_thread); if (pinger_thread == NULL) RETURN(-ENOMEM); - init_waitqueue_head(&pinger_thread->t_ctl_waitq); - init_waitqueue_head(&suspend_timeouts_waitq); + cfs_waitq_init(&pinger_thread->t_ctl_waitq); + cfs_waitq_init(&suspend_timeouts_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 ptlrpc_daemonize() right away. */ - rc = kernel_thread(ptlrpc_pinger_main, &d, CLONE_VM | CLONE_FILES); + * 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(rc); + RETURN(0); } +int ptlrpc_pinger_remove_timeouts(void); + int ptlrpc_stop_pinger(void) { struct l_wait_info lwi = { 0 }; @@ -286,42 +389,49 @@ int ptlrpc_stop_pinger(void) if (pinger_thread == NULL) RETURN(-EALREADY); - down(&pinger_sem); + + ptlrpc_pinger_remove_timeouts(); + cfs_mutex_down(&pinger_sem); pinger_thread->t_flags = SVC_STOPPING; - wake_up(&pinger_thread->t_ctl_waitq); - up(&pinger_sem); + cfs_waitq_signal(&pinger_thread->t_ctl_waitq); + cfs_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)); + OBD_FREE_PTR(pinger_thread); pinger_thread = NULL; RETURN(rc); } void ptlrpc_pinger_sending_on_import(struct obd_import *imp) { - down(&pinger_sem); - imp->imp_next_ping = ptlrpc_next_ping(imp); - up(&pinger_sem); + 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)) + if (!cfs_list_empty(&imp->imp_pinger_chain)) RETURN(-EALREADY); - down(&pinger_sem); + cfs_mutex_down(&pinger_sem); CDEBUG(D_HA, "adding pingable import %s->%s\n", - imp->imp_obd->obd_uuid.uuid, imp->imp_target_uuid.uuid); - imp->imp_next_ping = jiffies + (obd_timeout * HZ); + 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); + cfs_list_add_tail(&imp->imp_pinger_chain, &pinger_imports); class_import_get(imp); ptlrpc_pinger_wake_up(); - up(&pinger_sem); + cfs_mutex_up(&pinger_sem); RETURN(0); } @@ -329,130 +439,457 @@ int ptlrpc_pinger_add_import(struct obd_import *imp) int ptlrpc_pinger_del_import(struct obd_import *imp) { ENTRY; - if (list_empty(&imp->imp_pinger_chain)) + if (cfs_list_empty(&imp->imp_pinger_chain)) RETURN(-ENOENT); - down(&pinger_sem); - list_del_init(&imp->imp_pinger_chain); + cfs_mutex_down(&pinger_sem); + cfs_list_del_init(&imp->imp_pinger_chain); CDEBUG(D_HA, "removing pingable import %s->%s\n", - imp->imp_obd->obd_uuid.uuid, imp->imp_target_uuid.uuid); + 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); - up(&pinger_sem); + cfs_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); + + cfs_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) { + cfs_list_for_each_entry_reverse(tmp, &timeout_list, ti_chain) { + if (tmp->ti_timeout < time) { + cfs_list_add(&item->ti_chain, &tmp->ti_chain); + goto out; + } + } + cfs_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, + cfs_list_t *obd_list) +{ + struct timeout_item *ti; + + cfs_mutex_down(&pinger_sem); + ti = ptlrpc_pinger_register_timeout(time, event, cb, data); + if (!ti) { + cfs_mutex_up(&pinger_sem); + return (-EINVAL); + } + cfs_list_add(obd_list, &ti->ti_obd_list); + cfs_mutex_up(&pinger_sem); + return 0; +} + +int ptlrpc_del_timeout_client(cfs_list_t *obd_list, + enum timeout_event event) +{ + struct timeout_item *ti = NULL, *item; + + if (cfs_list_empty(obd_list)) + return 0; + cfs_mutex_down(&pinger_sem); + cfs_list_del_init(obd_list); + /** + * If there are no obd attached to the timeout event + * list, remove this timeout event from the pinger + */ + cfs_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 (cfs_list_empty(&ti->ti_obd_list)) { + cfs_list_del(&ti->ti_chain); + OBD_FREE_PTR(ti); + } + cfs_mutex_up(&pinger_sem); + return 0; +} + +int ptlrpc_pinger_remove_timeouts(void) +{ + struct timeout_item *item, *tmp; + + cfs_mutex_down(&pinger_sem); + cfs_list_for_each_entry_safe(item, tmp, &timeout_list, ti_chain) { + LASSERT(cfs_list_empty(&item->ti_obd_list)); + cfs_list_del(&item->ti_chain); + OBD_FREE_PTR(item); + } + cfs_mutex_up(&pinger_sem); + return 0; +} + void ptlrpc_pinger_wake_up() { #ifdef ENABLE_PINGER pinger_thread->t_flags |= SVC_EVENT; - wake_up(&pinger_thread->t_ctl_waitq); + 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 cfs_waitq_t pet_waitq; +CFS_LIST_HEAD(pet_list); +static cfs_spinlock_t pet_lock = CFS_SPIN_LOCK_UNLOCKED; + +int ping_evictor_wake(struct obd_export *exp) +{ + struct obd_device *obd; + + cfs_spin_lock(&pet_lock); + if (pet_state != PET_READY) { + /* eventually the new obd will call here again. */ + cfs_spin_unlock(&pet_lock); + return 1; + } + + obd = class_exp2obd(exp); + if (cfs_list_empty(&obd->obd_evict_list)) { + class_incref(obd, "evictor", obd); + cfs_list_add(&obd->obd_evict_list, &pet_list); + } + cfs_spin_unlock(&pet_lock); + + cfs_waitq_signal(&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_state = PET_READY; + while (1) { + l_wait_event(pet_waitq, (!cfs_list_empty(&pet_list)) || + (pet_state == PET_TERMINATE), &lwi); + + /* loop until all obd's will be removed */ + if ((pet_state == PET_TERMINATE) && cfs_list_empty(&pet_list)) + 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. */ + cfs_spin_lock(&pet_lock); + obd = cfs_list_entry(pet_list.next, struct obd_device, + obd_evict_list); + cfs_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. */ + cfs_spin_lock(&obd->obd_dev_lock); + while (!cfs_list_empty(&obd->obd_exports_timed)) { + exp = cfs_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); + cfs_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. exp %p, cur %ld expire %ld" + " last %ld\n", + obd->obd_name, + obd_uuid2str(&exp->exp_client_uuid), + obd_export_nid2str(exp), + (long)(cfs_time_current_sec() - + exp->exp_last_request_time), + exp, (long)cfs_time_current_sec(), + (long)expire_time, + (long)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); + cfs_spin_lock(&obd->obd_dev_lock); + } else { + /* List is sorted, so everyone below is ok */ + break; + } + } + cfs_spin_unlock(&obd->obd_dev_lock); + + cfs_spin_lock(&pet_lock); + cfs_list_del_init(&obd->obd_evict_list); + cfs_spin_unlock(&pet_lock); + + class_decref(obd, "evictor", obd); + } + CDEBUG(D_HA, "Exiting Ping Evictor\n"); + + RETURN(0); +} + +void ping_evictor_start(void) +{ + int rc; + + if (++pet_refcount > 1) + return; + + cfs_waitq_init(&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; + cfs_waitq_signal(&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; - unsigned long pd_this_ping; - unsigned long pd_next_ping; - int pd_force_check; + 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) { - unsigned long curtime = time(NULL); - struct list_head *iter; + cfs_time_t curtime = cfs_time_current(); + struct ptlrpc_request *req; + struct ptlrpc_request_set *set; + cfs_list_t *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_next_ping > curtime && !pd->pd_force_check) { + if (!pd->pd_set && cfs_time_before(curtime, pd->pd_next_ping)) { pd->pd_recursion--; return 0; } - if (pd->pd_force_check) - pd->pd_force_check = 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 */ - down(&pinger_sem); - list_for_each(iter, &pinger_imports) { - struct obd_import *imp = - list_entry(iter, struct obd_import, - imp_pinger_chain); - int level, force; - unsigned long flags; - - - spin_lock_irqsave(&imp->imp_lock, flags); - level = imp->imp_state; - force = imp->imp_force_verify; - if (force) - imp->imp_force_verify = 0; - spin_unlock_irqrestore(&imp->imp_lock, flags); - - if (imp->imp_next_ping <= pd->pd_this_ping || force) { - if (level == LUSTRE_IMP_DISCON) { - /* wait at least a timeout before - trying recovery again. */ - unsigned long timeout = obd_timeout; - if (imp->imp_server_timeout) - timeout = obd_timeout / 2; - imp->imp_next_ping = time(NULL) + - (timeout * HZ); - ptlrpc_initiate_recovery(imp); - } - else if (level != LUSTRE_IMP_FULL || - imp->imp_obd->obd_no_recov) { - CDEBUG(D_HA, - "not pinging %s (in recovery " - " or recovery disabled: %s)\n", - imp->imp_target_uuid.uuid, - ptlrpc_import_state_name(level)); - } - else if (imp->imp_pingable || force) { - ptlrpc_ping(imp); + cfs_mutex_down(&pinger_sem); + cfs_list_for_each(iter, &pinger_imports) { + struct obd_import *imp = cfs_list_entry(iter, struct obd_import, + imp_pinger_chain); + int generation, level; + + if (cfs_time_aftereq(pd->pd_this_ping, + imp->imp_next_ping - 5 * CFS_TICK)) { + /* Add a ping. */ + cfs_spin_lock(&imp->imp_lock); + generation = imp->imp_generation; + level = imp->imp_state; + cfs_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; } - } else { - if (imp->imp_pingable) { - CDEBUG(D_HA, "don't need to ping %s " - "(%lu > %lu)\n", - imp->imp_target_uuid.uuid, - imp->imp_next_ping, pd->pd_this_ping); + req = ptlrpc_request_alloc_pack(imp, &RQF_OBD_PING, + LUSTRE_OBD_VERSION, + OBD_PING); + if (req == NULL) { + CERROR("OOM trying to ping %s->%s\n", + imp->imp_obd->obd_uuid.uuid, + obd2cli_tgt(imp->imp_obd)); + break; } + + req->rq_no_resend = 1; + ptlrpc_request_set_replen(req); + 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; + cfs_mutex_up(&pinger_sem); + + /* Might be empty, that's OK. */ + if (cfs_atomic_read(&set->set_remaining) == 0) + CDEBUG(D_RPCTRACE, "nothing to ping\n"); + + cfs_list_for_each(iter, &set->set_requests) { + struct ptlrpc_request *req = + cfs_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(NULL, 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. */ + cfs_mutex_down(&pinger_sem); + cfs_list_for_each(iter, &set->set_requests) { + req = cfs_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; + cfs_spin_lock(&imp->imp_lock); + if (!cfs_list_empty(&req->rq_list)) { + cfs_list_del_init(&req->rq_list); + cfs_atomic_dec(&imp->imp_inflight); } + cfs_spin_unlock(&imp->imp_lock); + cfs_atomic_dec(&set->set_remaining); } + cfs_mutex_up(&pinger_sem); - up(&pinger_sem); + ptlrpc_set_destroy(set); + pd->pd_set = NULL; - pd->pd_next_ping = pd->pd_this_ping + (obd_timeout * HZ); +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_HA, "finished a round ping\n"); + 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) { - memset(&pinger_args, 0, sizeof(pinger_args)); #ifdef ENABLE_PINGER - pinger_callback = - liblustre_register_wait_callback(&pinger_check_rpcs, &pinger_args); + memset(&pinger_args, 0, sizeof(pinger_args)); + pinger_callback = liblustre_register_wait_callback("pinger_check_rpcs", + &pinger_check_rpcs, + &pinger_args); #endif return 0; } @@ -468,30 +905,61 @@ int ptlrpc_stop_pinger(void) void ptlrpc_pinger_sending_on_import(struct obd_import *imp) { - down(&pinger_sem); - imp->imp_next_ping = time(NULL) + obd_timeout; - if (pinger_args.pd_next_ping > imp->imp_next_ping) { - CDEBUG(D_HA, "set next ping to %ld(cur %ld)\n", - imp->imp_next_ping, time(NULL)); +#ifdef ENABLE_PINGER + cfs_mutex_down(&pinger_sem); + ptlrpc_update_next_ping(imp, 0); + if (pinger_args.pd_set == NULL && + cfs_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; } - up(&pinger_sem); + cfs_mutex_up(&pinger_sem); +#endif +} + +void ptlrpc_pinger_commit_expected(struct obd_import *imp) +{ +#ifdef ENABLE_PINGER + cfs_mutex_down(&pinger_sem); + ptlrpc_update_next_ping(imp, 1); + if (pinger_args.pd_set == NULL && + cfs_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; + } + cfs_mutex_up(&pinger_sem); +#endif +} + +int ptlrpc_add_timeout_client(int time, enum timeout_event event, + timeout_cb_t cb, void *data, + cfs_list_t *obd_list) +{ + return 0; +} + +int ptlrpc_del_timeout_client(cfs_list_t *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)) + if (!cfs_list_empty(&imp->imp_pinger_chain)) RETURN(-EALREADY); CDEBUG(D_HA, "adding pingable import %s->%s\n", - imp->imp_obd->obd_uuid.uuid, imp->imp_target_uuid.uuid); + imp->imp_obd->obd_uuid.uuid, obd2cli_tgt(imp->imp_obd)); ptlrpc_pinger_sending_on_import(imp); - down(&pinger_sem); - list_add_tail(&imp->imp_pinger_chain, &pinger_imports); + cfs_mutex_down(&pinger_sem); + cfs_list_add_tail(&imp->imp_pinger_chain, &pinger_imports); class_import_get(imp); - up(&pinger_sem); + cfs_mutex_up(&pinger_sem); RETURN(0); } @@ -499,20 +967,45 @@ int ptlrpc_pinger_add_import(struct obd_import *imp) int ptlrpc_pinger_del_import(struct obd_import *imp) { ENTRY; - if (list_empty(&imp->imp_pinger_chain)) + if (cfs_list_empty(&imp->imp_pinger_chain)) RETURN(-ENOENT); - down(&pinger_sem); - list_del_init(&imp->imp_pinger_chain); + cfs_mutex_down(&pinger_sem); + cfs_list_del_init(&imp->imp_pinger_chain); CDEBUG(D_HA, "removing pingable import %s->%s\n", - imp->imp_obd->obd_uuid.uuid, imp->imp_target_uuid.uuid); + imp->imp_obd->obd_uuid.uuid, obd2cli_tgt(imp->imp_obd)); class_import_put(imp); - up(&pinger_sem); + cfs_mutex_up(&pinger_sem); RETURN(0); } void ptlrpc_pinger_wake_up() { - pinger_args.pd_force_check = 1; +#ifdef ENABLE_PINGER + /* XXX force pinger to run, if needed */ + struct obd_import *imp; + ENTRY; + cfs_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)); + } + EXIT; +#endif } #endif /* !__KERNEL__ */