#include "../include/obd_class.h"
#include "ptlrpc_internal.h"
-static int suppress_pings;
-module_param(suppress_pings, int, 0644);
-MODULE_PARM_DESC(suppress_pings, "Suppress pings");
-
struct mutex pinger_mutex;
static LIST_HEAD(pinger_imports);
static struct list_head timeout_list = LIST_HEAD_INIT(timeout_list);
-int ptlrpc_pinger_suppress_pings(void)
-{
- return suppress_pings;
-}
-EXPORT_SYMBOL(ptlrpc_pinger_suppress_pings);
-
struct ptlrpc_request *
ptlrpc_prep_ping(struct obd_import *imp)
{
}
EXPORT_SYMBOL(ptlrpc_obd_ping);
-int ptlrpc_ping(struct obd_import *imp)
+static int ptlrpc_ping(struct obd_import *imp)
{
struct ptlrpc_request *req;
DEBUG_REQ(D_INFO, req, "pinging %s->%s",
imp->imp_obd->obd_uuid.uuid, obd2cli_tgt(imp->imp_obd));
- ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
+ ptlrpcd_add_req(req);
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)
{
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 :
imp->imp_next_ping = cfs_time_shift(time);
}
-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 ||
return cfs_time_shift(obd_timeout);
}
-long pinger_check_timeout(unsigned long time)
+static long pinger_check_timeout(unsigned long time)
{
struct timeout_item *item;
unsigned long timeout = PING_INTERVAL;
mutex_lock(&pinger_mutex);
list_for_each_entry(item, &timeout_list, ti_chain) {
int ti_timeout = item->ti_timeout;
+
if (timeout > ti_timeout)
timeout = ti_timeout;
break;
static int ptlrpc_pinger_main(void *arg)
{
- struct ptlrpc_thread *thread = (struct ptlrpc_thread *)arg;
+ struct ptlrpc_thread *thread = arg;
/* Record that the thread is running */
thread_set_flags(thread, SVC_RUNNING);
ptlrpc_update_next_ping(imp, 0);
}
mutex_unlock(&pinger_mutex);
- /* update memory usage info */
- obd_update_maxusage();
/* Wait until the next ping time, or until we're stopped. */
time_to_next_wake = pinger_check_timeout(this_ping);
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,
+ CDEBUG(D_INFO, "next wakeup in " CFS_DURATION_T " (%ld)\n",
+ time_to_next_wake,
cfs_time_add(this_ping,
cfs_time_seconds(PING_INTERVAL)));
if (time_to_next_wake > 0) {
thread_is_stopping(thread) ||
thread_is_event(thread),
&lwi);
- if (thread_test_and_clear_flags(thread, SVC_STOPPING)) {
+ if (thread_test_and_clear_flags(thread, SVC_STOPPING))
break;
- } else {
- /* woken after adding import to reset timer */
- thread_test_and_clear_flags(thread, SVC_EVENT);
- }
+ /* woken after adding import to reset timer */
+ thread_test_and_clear_flags(thread, SVC_EVENT);
}
}
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 = PTR_ERR(kthread_run(ptlrpc_pinger_main, &pinger_thread,
"%s", pinger_thread.t_name));
if (IS_ERR_VALUE(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 administrator. The configuration shall meet the additional requirements described in the manual. (Search for the \"suppress_pings\" kernel module parameter.)\n");
-
return 0;
}
-int ptlrpc_pinger_remove_timeouts(void);
+static int ptlrpc_pinger_remove_timeouts(void);
int ptlrpc_stop_pinger(void)
{
* 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;
- OBD_ALLOC_PTR(ti);
+ ti = kzalloc(sizeof(*ti), GFP_NOFS);
if (!ti)
return NULL;
LASSERTF(ti != NULL, "ti is NULL !\n");
if (list_empty(&ti->ti_obd_list)) {
list_del(&ti->ti_chain);
- OBD_FREE_PTR(ti);
+ kfree(ti);
}
mutex_unlock(&pinger_mutex);
return 0;
}
EXPORT_SYMBOL(ptlrpc_del_timeout_client);
-int ptlrpc_pinger_remove_timeouts(void)
+static int ptlrpc_pinger_remove_timeouts(void)
{
struct timeout_item *item, *tmp;
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);
+ kfree(item);
}
mutex_unlock(&pinger_mutex);
return 0;
thread_add_flags(&pinger_thread, SVC_EVENT);
wake_up(&pinger_thread.t_ctl_waitq);
}
-
-/* Ping evictor thread */
-#define PET_READY 1
-#define PET_TERMINATE 2
-
-static int pet_refcount;
-static int pet_state;
-static wait_queue_head_t pet_waitq;
-LIST_HEAD(pet_list);
-static DEFINE_SPINLOCK(pet_lock);
-
-int ping_evictor_wake(struct obd_export *exp)
-{
- struct obd_device *obd;
-
- spin_lock(&pet_lock);
- if (pet_state != PET_READY) {
- /* eventually the new obd will call here again. */
- spin_unlock(&pet_lock);
- return 1;
- }
-
- obd = class_exp2obd(exp);
- if (list_empty(&obd->obd_evict_list)) {
- class_incref(obd, "evictor", obd);
- list_add(&obd->obd_evict_list, &pet_list);
- }
- 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;
-
- unshare_fs_struct();
-
- 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) && 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. */
- spin_lock(&pet_lock);
- obd = list_entry(pet_list.next, struct obd_device,
- obd_evict_list);
- spin_unlock(&pet_lock);
-
- expire_time = get_seconds() - 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. exp %p, cur %ld expire %ld last %ld\n",
- obd->obd_name,
- obd_uuid2str(&exp->exp_client_uuid),
- obd_export_nid2str(exp),
- (long)(get_seconds() -
- exp->exp_last_request_time),
- exp, (long)get_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);
-
- spin_lock(&pet_lock);
- list_del_init(&obd->obd_evict_list);
- spin_unlock(&pet_lock);
-
- class_decref(obd, "evictor", obd);
- }
- CDEBUG(D_HA, "Exiting Ping Evictor\n");
-
- return 0;
-}
-
-void ping_evictor_start(void)
-{
- struct task_struct *task;
-
- if (++pet_refcount > 1)
- return;
-
- init_waitqueue_head(&pet_waitq);
-
- 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);
-
-void ping_evictor_stop(void)
-{
- if (--pet_refcount > 0)
- return;
-
- pet_state = PET_TERMINATE;
- wake_up(&pet_waitq);
-}
-EXPORT_SYMBOL(ping_evictor_stop);
Code Review / kvmfornfv.git / blobdiff