* Authors: Phil Schwan <phil@clusterfs.com>
* Mike Shaver <shaver@clusterfs.com>
*
- * This file is part of Lustre, http://www.lustre.org.
+ * This file is part of the Lustre file system, http://www.lustre.org
+ * Lustre is a trademark of Cluster File Systems, Inc.
*
- * 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 may have signed or agreed to another license before downloading
+ * this software. If so, you are bound by the terms and conditions
+ * of that agreement, and the following does not apply to you. See the
+ * LICENSE file included with this distribution for more information.
*
- * 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.
+ * If you did not agree to a different license, then this copy of Lustre
+ * is open source 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
- * along with Lustre; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * In either case, 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
+ * license text for more details.
*/
#ifndef __KERNEL__
#include <liblustre.h>
#else
-#include <linux/version.h>
-#include <asm/semaphore.h>
#define DEBUG_SUBSYSTEM S_RPC
#endif
-#include <linux/obd_support.h>
-#include <linux/obd_class.h>
+#include <obd_support.h>
+#include <obd_class.h>
#include "ptlrpc_internal.h"
-static DECLARE_MUTEX(pinger_sem);
-static struct list_head pinger_imports = LIST_HEAD_INIT(pinger_imports);
+struct semaphore pinger_sem;
+static struct list_head pinger_imports = CFS_LIST_HEAD_INIT(pinger_imports);
-static struct ptlrpc_thread *pinger_thread = NULL;
-
-int ptlrpc_ping(struct obd_import *imp)
+int ptlrpc_ping(struct obd_import *imp)
{
struct ptlrpc_request *req;
int rc = 0;
ENTRY;
- req = ptlrpc_prep_req(imp, OBD_PING, 0, NULL,
- NULL);
+ req = ptlrpc_prep_req(imp, LUSTRE_OBD_VERSION, OBD_PING, 1, NULL, NULL);
if (req) {
- DEBUG_REQ(D_HA, req, "pinging %s->%s",
+ DEBUG_REQ(D_INFO, req, "pinging %s->%s",
imp->imp_obd->obd_uuid.uuid,
- imp->imp_target_uuid.uuid);
+ obd2cli_tgt(imp->imp_obd));
req->rq_no_resend = req->rq_no_delay = 1;
- req->rq_replen = lustre_msg_size(0,
- NULL);
+ ptlrpc_req_set_repsize(req, 1, NULL);
+ req->rq_timeout = PING_INTERVAL;
ptlrpcd_add_req(req);
} else {
CERROR("OOM trying to ping %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));
rc = -ENOMEM;
}
RETURN(rc);
}
+static void ptlrpc_update_next_ping(struct obd_import *imp)
+{
+ imp->imp_next_ping = cfs_time_shift(
+ (imp->imp_state == LUSTRE_IMP_DISCON ?
+ RECONNECT_INTERVAL : PING_INTERVAL));
+}
+
+void ptlrpc_ping_import_soon(struct obd_import *imp)
+{
+ imp->imp_next_ping = cfs_time_current();
+}
+
+static inline int ptlrpc_next_reconnect(struct obd_import *imp)
+{
+ if (imp->imp_server_timeout)
+ return cfs_time_shift(obd_timeout / 2);
+ else
+ return cfs_time_shift(obd_timeout);
+}
+
+static atomic_t suspend_timeouts = ATOMIC_INIT(0);
+static cfs_time_t suspend_wakeup_time = 0;
+
#ifdef __KERNEL__
+static wait_queue_head_t suspend_timeouts_waitq;
+#endif
+
+cfs_time_t ptlrpc_suspend_wakeup_time(void)
+{
+ return suspend_wakeup_time;
+}
+
+void ptlrpc_deactivate_timeouts(struct obd_import *imp)
+{
+ /*XXX: disabled for now, will be replaced by adaptive timeouts */
+#if 0
+ if (imp->imp_no_timeout)
+ return;
+ imp->imp_no_timeout = 1;
+ atomic_inc(&suspend_timeouts);
+ CDEBUG(D_HA|D_WARNING, "deactivate timeouts %u\n", atomic_read(&suspend_timeouts));
+#endif
+}
+
+void ptlrpc_activate_timeouts(struct obd_import *imp)
+{
+ /*XXX: disabled for now, will be replaced by adaptive timeouts */
+#if 0
+ if (!imp->imp_no_timeout)
+ return;
+ imp->imp_no_timeout = 0;
+ LASSERT(atomic_read(&suspend_timeouts) > 0);
+ if (atomic_dec_and_test(&suspend_timeouts)) {
+ suspend_wakeup_time = cfs_time_current();
+ wake_up(&suspend_timeouts_waitq);
+ }
+ CDEBUG(D_HA|D_WARNING, "activate timeouts %u\n", atomic_read(&suspend_timeouts));
+#endif
+}
+
+int ptlrpc_check_suspend(void)
+{
+ if (atomic_read(&suspend_timeouts))
+ return 1;
+ return 0;
+}
+
+int ptlrpc_check_and_wait_suspend(struct ptlrpc_request *req)
+{
+ struct l_wait_info lwi;
+
+ if (atomic_read(&suspend_timeouts)) {
+ DEBUG_REQ(D_NET, req, "-- suspend %d regular timeout",
+ atomic_read(&suspend_timeouts));
+ lwi = LWI_INTR(NULL, NULL);
+ l_wait_event(suspend_timeouts_waitq,
+ 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)
+{
+ int force, level;
+
+ spin_lock(&imp->imp_lock);
+ level = imp->imp_state;
+ force = imp->imp_force_verify;
+ if (force)
+ imp->imp_force_verify = 0;
+ spin_unlock(&imp->imp_lock);
+
+ 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 (cfs_time_aftereq(imp->imp_next_ping - 5 * CFS_TICK,
+ this_ping) && force == 0)
+ return;
+
+ if (level == LUSTRE_IMP_DISCON && !imp->imp_deactive) {
+ /* 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 ||
+ imp->imp_deactive) {
+ CDEBUG(D_HA, "not pinging %s (in recovery "
+ " or recovery disabled: %s)\n",
+ obd2cli_tgt(imp->imp_obd),
+ ptlrpc_import_state_name(level));
+ } else if (imp->imp_pingable || force) {
+ ptlrpc_ping(imp);
+ }
+}
+
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);
-
- THREAD_NAME(current->comm, "%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);
+ cfs_time_t this_ping = cfs_time_current();
+ struct l_wait_info lwi;
+ cfs_duration_t time_to_next_ping;
struct list_head *iter;
- down(&pinger_sem);
+ mutex_down(&pinger_sem);
list_for_each(iter, &pinger_imports) {
struct obd_import *imp =
list_entry(iter, struct obd_import,
imp_pinger_chain);
- int force, level;
- 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 <= this_ping || force) {
- if (level == LUSTRE_IMP_DISCON) {
- /* wait at least a timeout before
- trying recovery again. */
- imp->imp_next_ping = jiffies +
- (obd_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);
- }
- } 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, this_ping);
- }
+ ptlrpc_pinger_process_import(imp, this_ping);
+ /* obd_timeout might have changed */
+ if (imp->imp_pingable && imp->imp_next_ping &&
+ cfs_time_after(imp->imp_next_ping,
+ cfs_time_add(this_ping,
+ cfs_time_seconds(PING_INTERVAL))))
+ ptlrpc_update_next_ping(imp);
}
- up(&pinger_sem);
+ mutex_up(&pinger_sem);
/* Wait until the next ping time, or until we're stopped. */
- time_to_next_ping = this_ping + (obd_timeout * HZ) - jiffies;
- CDEBUG(D_HA, "next ping in %lu (%lu)\n", time_to_next_ping,
- this_ping + (obd_timeout * HZ));
+ time_to_next_ping = cfs_time_sub(cfs_time_add(this_ping,
+ cfs_time_seconds(PING_INTERVAL)),
+ cfs_time_current());
+
+ /* The ping sent by ptlrpc_send_rpc may get sent out
+ say .01 second after this.
+ ptlrpc_pinger_eending_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 ping in "CFS_DURATION_T" ("CFS_TIME_T")\n",
+ time_to_next_ping,
+ cfs_time_add(this_ping, cfs_time_seconds(PING_INTERVAL)));
if (time_to_next_ping > 0) {
- lwi = LWI_TIMEOUT(time_to_next_ping, NULL, NULL);
+ lwi = LWI_TIMEOUT(max_t(cfs_duration_t, time_to_next_ping, cfs_time_seconds(1)),
+ NULL, NULL);
l_wait_event(thread->t_ctl_waitq,
thread->t_flags & (SVC_STOPPING|SVC_EVENT),
&lwi);
}
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;
}
+static struct ptlrpc_thread *pinger_thread = NULL;
+
int ptlrpc_start_pinger(void)
{
struct l_wait_info lwi = { 0 };
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);
-
+ 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);
+ 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_stop_pinger(void)
if (pinger_thread == NULL)
RETURN(-EALREADY);
- down(&pinger_sem);
+ 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);
+ 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 = jiffies + (obd_timeout * HZ);
- up(&pinger_sem);
+ ptlrpc_update_next_ping(imp);
}
int ptlrpc_pinger_add_import(struct obd_import *imp)
if (!list_empty(&imp->imp_pinger_chain))
RETURN(-EALREADY);
- down(&pinger_sem);
+ 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);
/* XXX sort, blah blah */
list_add_tail(&imp->imp_pinger_chain, &pinger_imports);
class_import_get(imp);
ptlrpc_pinger_wake_up();
- up(&pinger_sem);
+ mutex_up(&pinger_sem);
RETURN(0);
}
if (list_empty(&imp->imp_pinger_chain))
RETURN(-ENOENT);
- down(&pinger_sem);
+ 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, 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);
+ mutex_up(&pinger_sem);
RETURN(0);
}
{
#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 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) {
+ /* 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;
+
+ ptlrpc_daemonize("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 = CURRENT_SECONDS - (3 * obd_timeout / 2);
+
+ 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. exp %p, cur %ld expire %ld"
+ " last %ld\n",
+ obd->obd_name,
+ obd_uuid2str(&exp->exp_client_uuid),
+ obd_export_nid2str(exp),
+ (long)(CURRENT_SECONDS -
+ exp->exp_last_request_time),
+ exp, (long)CURRENT_SECONDS,
+ (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);
+ 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;
- 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);
+ cfs_time_t curtime = cfs_time_current();
+ struct ptlrpc_request *req;
+ struct ptlrpc_request_set *set;
struct list_head *iter;
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 && 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);
+ mutex_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. */
- imp->imp_next_ping = time(NULL) +
- (obd_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);
+ 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. */
+ 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;
}
- } 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_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;
+ req->rq_phase = RQ_PHASE_RPC;
+ req->rq_import_generation = generation;
+ ptlrpc_set_add_req(set, req);
+ } else {
+ CDEBUG(D_HA, "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_HA, "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_HA, 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);
+ }
- up(&pinger_sem);
+do_check_set:
+ rc = ptlrpc_check_set(set);
- pd->pd_next_ping = pd->pd_this_ping + (obd_timeout * HZ);
+ /* 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_HA, "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;
+
+ req->rq_phase = RQ_PHASE_COMPLETE;
+ atomic_dec(&req->rq_import->imp_inflight);
+ set->set_remaining--;
+ /* If it was disconnected, don't sweat it. */
+ if (list_empty(&req->rq_import->imp_pinger_chain)) {
+ ptlrpc_unregister_reply(req);
+ continue;
+ }
+
+ CDEBUG(D_HA, "pinger initiate expire_one_request\n");
+ ptlrpc_expire_one_request(req);
+ }
+ 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_HA, "finished a round ping\n");
pd->pd_recursion--;
}
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;
}
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
+ mutex_down(&pinger_sem);
+ ptlrpc_update_next_ping(imp);
+ 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;
}
- up(&pinger_sem);
+ mutex_up(&pinger_sem);
+#endif
}
int ptlrpc_pinger_add_import(struct obd_import *imp)
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);
+ mutex_down(&pinger_sem);
list_add_tail(&imp->imp_pinger_chain, &pinger_imports);
class_import_get(imp);
- up(&pinger_sem);
+ mutex_up(&pinger_sem);
RETURN(0);
}
if (list_empty(&imp->imp_pinger_chain))
RETURN(-ENOENT);
- down(&pinger_sem);
+ 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, imp->imp_target_uuid.uuid);
+ imp->imp_obd->obd_uuid.uuid, obd2cli_tgt(imp->imp_obd));
class_import_put(imp);
- up(&pinger_sem);
+ 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;
+ list_for_each_entry(imp, &pinger_imports, imp_pinger_chain) {
+ CDEBUG(D_HA, "Checking that we need to do anything about 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->imp_deactive)
+#else
+ /*XXX only recover for the initial connection */
+ if (!lustre_handle_is_used(&imp->imp_remote_handle) &&
+ imp->imp_state == LUSTRE_IMP_DISCON && !imp->imp_deactive)
+#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->imp_deactive);
+ }
+ EXIT;
+#endif
}
#endif /* !__KERNEL__ */
git://git.whamcloud.com / fs / lustre-release.git / blobdiff