* Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2011, 2012, Intel Corporation.
+ * Copyright (c) 2011, 2014, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Portal-RPC reconnection and replay operations, for use in recovery.
*/
-#ifndef __KERNEL__
-#include <liblustre.h>
-#else
#define DEBUG_SUBSYSTEM S_RPC
-#endif
+#include <linux/kthread.h>
#include <obd_support.h>
#include <obd_class.h>
#include "ptlrpc_internal.h"
CFS_MODULE_PARM(suppress_pings, "i", int, 0644, "Suppress pings");
struct mutex pinger_mutex;
-static CFS_LIST_HEAD(pinger_imports);
-static cfs_list_t timeout_list = CFS_LIST_HEAD_INIT(timeout_list);
+static struct list_head pinger_imports =
+ LIST_HEAD_INIT(pinger_imports);
+static struct list_head timeout_list =
+ LIST_HEAD_INIT(timeout_list);
int ptlrpc_pinger_suppress_pings()
{
}
EXPORT_SYMBOL(ptlrpc_obd_ping);
-int ptlrpc_ping(struct obd_import *imp)
+static int ptlrpc_ping(struct obd_import *imp)
{
struct ptlrpc_request *req;
ENTRY;
RETURN(0);
}
-void ptlrpc_update_next_ping(struct obd_import *imp, int soon)
+static void ptlrpc_update_next_ping(struct obd_import *imp, int soon)
{
#ifdef ENABLE_PINGER
int time = soon ? PING_INTERVAL_SHORT : PING_INTERVAL;
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)
+static 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 */
+ /* This list is sorted in increasing timeout order */
mutex_lock(&pinger_mutex);
- cfs_list_for_each_entry(item, &timeout_list, ti_chain) {
- int ti_timeout = item->ti_timeout;
- if (timeout > ti_timeout)
- timeout = ti_timeout;
- break;
- }
+ list_for_each_entry(item, &timeout_list, ti_chain) {
+ int ti_timeout = item->ti_timeout;
+ if (timeout > ti_timeout)
+ timeout = ti_timeout;
+ break;
+ }
mutex_unlock(&pinger_mutex);
return cfs_time_sub(cfs_time_add(time, cfs_time_seconds(timeout)),
cfs_time_current());
}
-static cfs_waitq_t suspend_timeouts_waitq;
-
-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;
- cfs_atomic_inc(&suspend_timeouts);
- CDEBUG(D_HA|D_WARNING, "deactivate timeouts %u\n",
- cfs_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(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 (cfs_atomic_read(&suspend_timeouts))
- return 1;
- return 0;
-}
-
-int ptlrpc_check_and_wait_suspend(struct ptlrpc_request *req)
-{
- struct l_wait_info lwi;
-
- if (cfs_atomic_read(&suspend_timeouts)) {
- DEBUG_REQ(D_NET, req, "-- suspend %d regular timeout",
- cfs_atomic_read(&suspend_timeouts));
- lwi = LWI_INTR(NULL, NULL);
- l_wait_event(suspend_timeouts_waitq,
- cfs_atomic_read(&suspend_timeouts) == 0, &lwi);
- DEBUG_REQ(D_NET, req, "-- recharge regular timeout");
- return 1;
- }
- return 0;
-}
-
-#ifdef __KERNEL__
static bool ir_up;
"or recovery disabled: %s)\n",
imp->imp_obd->obd_uuid.uuid, obd2cli_tgt(imp->imp_obd),
ptlrpc_import_state_name(level));
+ if (force) {
+ spin_lock(&imp->imp_lock);
+ imp->imp_force_verify = 1;
+ spin_unlock(&imp->imp_lock);
+ }
} else if ((imp->imp_pingable && !suppress) || force_next || force) {
ptlrpc_ping(imp);
}
static int ptlrpc_pinger_main(void *arg)
{
- struct ptlrpc_thread *thread = (struct ptlrpc_thread *)arg;
+ struct ptlrpc_thread *thread = (struct ptlrpc_thread *)arg;
ENTRY;
- cfs_daemonize(thread->t_name);
-
- /* Record that the thread is running */
- thread_set_flags(thread, SVC_RUNNING);
- cfs_waitq_signal(&thread->t_ctl_waitq);
+ /* Record that the thread is running */
+ thread_set_flags(thread, SVC_RUNNING);
+ wake_up(&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;
- struct timeout_item *item;
- cfs_list_t *iter;
+ /* 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;
+ struct timeout_item *item;
+ struct list_head *iter;
mutex_lock(&pinger_mutex);
- cfs_list_for_each_entry(item, &timeout_list, ti_chain) {
+ 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 =
- cfs_list_entry(iter, struct obd_import,
- imp_pinger_chain);
+
+ list_for_each(iter, &pinger_imports) {
+ struct obd_import *imp = list_entry(iter,
+ struct obd_import,
+ imp_pinger_chain);
ptlrpc_pinger_process_import(imp, this_ping);
/* obd_timeout might have changed */
}
}
- thread_set_flags(thread, SVC_STOPPED);
- cfs_waitq_signal(&thread->t_ctl_waitq);
+ thread_set_flags(thread, SVC_STOPPED);
+ wake_up(&thread->t_ctl_waitq);
- CDEBUG(D_NET, "pinger thread exiting, process %d\n", cfs_curproc_pid());
- return 0;
+ CDEBUG(D_NET, "pinger thread exiting, process %d\n", current_pid());
+ return 0;
}
-static struct ptlrpc_thread *pinger_thread = NULL;
+static struct ptlrpc_thread pinger_thread;
int ptlrpc_start_pinger(void)
{
- struct l_wait_info lwi = { 0 };
- int rc;
+ struct l_wait_info lwi = { 0 };
+ struct task_struct *task;
+ int rc;
#ifndef ENABLE_PINGER
- return 0;
+ return 0;
#endif
- ENTRY;
+ ENTRY;
- if (pinger_thread != NULL)
- RETURN(-EALREADY);
+ if (!thread_is_init(&pinger_thread) &&
+ !thread_is_stopped(&pinger_thread))
+ RETURN(-EALREADY);
- OBD_ALLOC_PTR(pinger_thread);
- if (pinger_thread == NULL)
- RETURN(-ENOMEM);
- cfs_waitq_init(&pinger_thread->t_ctl_waitq);
- cfs_waitq_init(&suspend_timeouts_waitq);
+ init_waitqueue_head(&pinger_thread.t_ctl_waitq);
- strcpy(pinger_thread->t_name, "ll_ping");
+ strcpy(pinger_thread.t_name, "ll_ping");
/* 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_create_thread(ptlrpc_pinger_main,
- pinger_thread, CFS_DAEMON_FLAGS);
- 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,
- thread_is_running(pinger_thread), &lwi);
+ * just drop the VM and FILES in kthread_run() right away. */
+ task = kthread_run(ptlrpc_pinger_main, &pinger_thread,
+ pinger_thread.t_name);
+ if (IS_ERR(task)) {
+ rc = PTR_ERR(task);
+ CERROR("cannot start pinger thread: rc = %d\n", rc);
+ RETURN(rc);
+ }
+
+ l_wait_event(pinger_thread.t_ctl_waitq,
+ thread_is_running(&pinger_thread), &lwi);
if (suppress_pings)
CWARN("Pings will be suppressed at the request of the "
int ptlrpc_stop_pinger(void)
{
- struct l_wait_info lwi = { 0 };
- int rc = 0;
+ struct l_wait_info lwi = { 0 };
#ifndef ENABLE_PINGER
- return 0;
+ return 0;
#endif
- ENTRY;
+ ENTRY;
- if (pinger_thread == NULL)
- RETURN(-EALREADY);
+ if (thread_is_init(&pinger_thread) ||
+ thread_is_stopped(&pinger_thread))
+ RETURN(-EALREADY);
- ptlrpc_pinger_remove_timeouts();
- mutex_lock(&pinger_mutex);
- thread_set_flags(pinger_thread, SVC_STOPPING);
- cfs_waitq_signal(&pinger_thread->t_ctl_waitq);
- mutex_unlock(&pinger_mutex);
+ ptlrpc_pinger_remove_timeouts();
- l_wait_event(pinger_thread->t_ctl_waitq,
- thread_is_stopped(pinger_thread), &lwi);
+ thread_set_flags(&pinger_thread, SVC_STOPPING);
+ wake_up(&pinger_thread.t_ctl_waitq);
- OBD_FREE_PTR(pinger_thread);
- pinger_thread = NULL;
- RETURN(rc);
+ l_wait_event(pinger_thread.t_ctl_waitq,
+ thread_is_stopped(&pinger_thread), &lwi);
+ RETURN(0);
}
void ptlrpc_pinger_sending_on_import(struct obd_import *imp)
{
ptlrpc_update_next_ping(imp, 0);
}
-EXPORT_SYMBOL(ptlrpc_pinger_sending_on_import);
void ptlrpc_pinger_commit_expected(struct obd_import *imp)
{
ptlrpc_update_next_ping(imp, 1);
- LASSERT_SPIN_LOCKED(&imp->imp_lock);
+ assert_spin_locked(&imp->imp_lock);
/*
* Avoid reading stale imp_connect_data. When not sure if pings are
* expected or not on next connection, we assume they are not and force
int ptlrpc_pinger_add_import(struct obd_import *imp)
{
ENTRY;
- if (!cfs_list_empty(&imp->imp_pinger_chain))
+ if (!list_empty(&imp->imp_pinger_chain))
RETURN(-EALREADY);
mutex_lock(&pinger_mutex);
imp->imp_obd->obd_no_recov = 0;
ptlrpc_update_next_ping(imp, 0);
/* XXX sort, blah blah */
- cfs_list_add_tail(&imp->imp_pinger_chain, &pinger_imports);
+ list_add_tail(&imp->imp_pinger_chain, &pinger_imports);
class_import_get(imp);
ptlrpc_pinger_wake_up();
int ptlrpc_pinger_del_import(struct obd_import *imp)
{
- ENTRY;
- if (cfs_list_empty(&imp->imp_pinger_chain))
- RETURN(-ENOENT);
+ ENTRY;
+
+ if (list_empty(&imp->imp_pinger_chain))
+ RETURN(-ENOENT);
mutex_lock(&pinger_mutex);
- cfs_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);
+ 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_unlock(&pinger_mutex);
- RETURN(0);
+ RETURN(0);
}
EXPORT_SYMBOL(ptlrpc_pinger_del_import);
* 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)
+static struct timeout_item *ptlrpc_new_timeout(int time,
+ enum timeout_event event,
+ timeout_cb_t cb, void *data)
{
struct timeout_item *ti;
if (!ti)
return(NULL);
- CFS_INIT_LIST_HEAD(&ti->ti_obd_list);
- CFS_INIT_LIST_HEAD(&ti->ti_chain);
+ INIT_LIST_HEAD(&ti->ti_obd_list);
+ INIT_LIST_HEAD(&ti->ti_chain);
ti->ti_timeout = time;
ti->ti_event = event;
ti->ti_cb = cb;
ptlrpc_pinger_register_timeout(int time, enum timeout_event event,
timeout_cb_t cb, void *data)
{
- struct timeout_item *item, *tmp;
+ struct timeout_item *item, *tmp;
- LASSERT_MUTEX_LOCKED(&pinger_mutex);
+ LASSERT(mutex_is_locked(&pinger_mutex));
- cfs_list_for_each_entry(item, &timeout_list, ti_chain)
- if (item->ti_event == event)
- goto out;
+ 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);
- }
+ 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;
+ return item;
}
/* Add a client_obd to the timeout event list, when timeout(@time)
*/
int ptlrpc_add_timeout_client(int time, enum timeout_event event,
timeout_cb_t cb, void *data,
- cfs_list_t *obd_list)
+ struct list_head *obd_list)
{
struct timeout_item *ti;
mutex_unlock(&pinger_mutex);
return (-EINVAL);
}
- cfs_list_add(obd_list, &ti->ti_obd_list);
+ list_add(obd_list, &ti->ti_obd_list);
mutex_unlock(&pinger_mutex);
return 0;
}
EXPORT_SYMBOL(ptlrpc_add_timeout_client);
-int ptlrpc_del_timeout_client(cfs_list_t *obd_list,
- enum timeout_event event)
+int ptlrpc_del_timeout_client(struct list_head *obd_list,
+ enum timeout_event event)
{
- struct timeout_item *ti = NULL, *item;
+ struct timeout_item *ti = NULL, *item;
- if (cfs_list_empty(obd_list))
- return 0;
+ if (list_empty(obd_list))
+ return 0;
mutex_lock(&pinger_mutex);
- 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);
- }
+ 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_unlock(&pinger_mutex);
- return 0;
+ return 0;
}
EXPORT_SYMBOL(ptlrpc_del_timeout_client);
struct timeout_item *item, *tmp;
mutex_lock(&pinger_mutex);
- 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);
+ 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_unlock(&pinger_mutex);
void ptlrpc_pinger_wake_up()
{
#ifdef ENABLE_PINGER
- thread_add_flags(pinger_thread, SVC_EVENT);
- cfs_waitq_signal(&pinger_thread->t_ctl_waitq);
+ thread_add_flags(&pinger_thread, SVC_EVENT);
+ wake_up(&pinger_thread.t_ctl_waitq);
#endif
}
static int pet_refcount = 0;
static int pet_state;
-static cfs_waitq_t pet_waitq;
-CFS_LIST_HEAD(pet_list);
+static wait_queue_head_t pet_waitq;
+static struct list_head pet_list;
static DEFINE_SPINLOCK(pet_lock);
int ping_evictor_wake(struct obd_export *exp)
}
obd = class_exp2obd(exp);
- if (cfs_list_empty(&obd->obd_evict_list)) {
+ if (list_empty(&obd->obd_evict_list)) {
class_incref(obd, "evictor", obd);
- cfs_list_add(&obd->obd_evict_list, &pet_list);
+ list_add(&obd->obd_evict_list, &pet_list);
}
spin_unlock(&pet_lock);
- cfs_waitq_signal(&pet_waitq);
+ wake_up(&pet_waitq);
return 0;
}
time_t expire_time;
ENTRY;
- cfs_daemonize_ctxt("ll_evictor");
+ unshare_fs_struct();
- 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);
+ CDEBUG(D_HA, "Starting Ping Evictor\n");
+ pet_state = PET_READY;
+ while (1) {
+ l_wait_event(pet_waitq, (!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;
+ /* loop until all obd's will be removed */
+ if ((pet_state == PET_TERMINATE) && 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. */
+ /* 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 = cfs_list_entry(pet_list.next, struct obd_device,
- obd_evict_list);
+ obd = list_entry(pet_list.next, struct obd_device,
+ obd_evict_list);
spin_unlock(&pet_lock);
- expire_time = cfs_time_current_sec() - PING_EVICT_TIMEOUT;
+ 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);
+ 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. */
+ /* 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 (!cfs_list_empty(&obd->obd_exports_timed)) {
- exp = cfs_list_entry(obd->obd_exports_timed.next,
- struct obd_export,
- exp_obd_chain_timed);
+ 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);
spin_unlock(&obd->obd_dev_lock);
spin_lock(&pet_lock);
- cfs_list_del_init(&obd->obd_evict_list);
+ list_del_init(&obd->obd_evict_list);
spin_unlock(&pet_lock);
class_decref(obd, "evictor", obd);
void ping_evictor_start(void)
{
- int rc;
+ struct task_struct *task;
- if (++pet_refcount > 1)
- return;
+ if (++pet_refcount > 1)
+ return;
- cfs_waitq_init(&pet_waitq);
+ INIT_LIST_HEAD(&pet_list);
+ init_waitqueue_head(&pet_waitq);
- rc = cfs_create_thread(ping_evictor_main, NULL, CFS_DAEMON_FLAGS);
- if (rc < 0) {
- pet_refcount--;
- CERROR("Cannot start ping evictor thread: %d\n", rc);
- }
+ task = kthread_run(ping_evictor_main, NULL, "ll_evictor");
+ if (IS_ERR(task)) {
+ pet_refcount--;
+ CERROR("Cannot start ping evictor thread: %ld\n",
+ PTR_ERR(task));
+ }
}
EXPORT_SYMBOL(ping_evictor_start);
return;
pet_state = PET_TERMINATE;
- cfs_waitq_signal(&pet_waitq);
+ 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;
- 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_set && cfs_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_lock(&pinger_mutex);
- 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. */
- 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_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;
- mutex_unlock(&pinger_mutex);
-
- /* 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. */
- mutex_lock(&pinger_mutex);
- 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;
- 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);
- }
- spin_unlock(&imp->imp_lock);
- cfs_atomic_dec(&set->set_remaining);
- }
- mutex_unlock(&pinger_mutex);
-
- 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_lock(&pinger_mutex);
- 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;
- }
- mutex_unlock(&pinger_mutex);
-#endif
-}
-
-void ptlrpc_pinger_commit_expected(struct obd_import *imp)
-{
-#ifdef ENABLE_PINGER
- mutex_lock(&pinger_mutex);
- 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;
- }
- mutex_unlock(&pinger_mutex);
-#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 (!cfs_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_lock(&pinger_mutex);
- cfs_list_add_tail(&imp->imp_pinger_chain, &pinger_imports);
- class_import_get(imp);
- mutex_unlock(&pinger_mutex);
-
- RETURN(0);
-}
-
-int ptlrpc_pinger_del_import(struct obd_import *imp)
-{
- ENTRY;
- if (cfs_list_empty(&imp->imp_pinger_chain))
- RETURN(-ENOENT);
-
- mutex_lock(&pinger_mutex);
- cfs_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_unlock(&pinger_mutex);
- RETURN(0);
-}
-
-void ptlrpc_pinger_wake_up()
-{
-#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__ */
git://git.whamcloud.com / fs / lustre-release.git / blobdiff