LU-14031 ptlrpc: remove unused code at pinger

The timeout_list was previously used for grant shrinking,
but right now is dead code.

HPE-bug-id: LUS-8520
Fixes: fc915a43786e ("LU-8708 osc: depart grant shrinking from pinger")
Signed-off-by: Alexander Boyko <alexander.boyko@hpe.com>
Change-Id: Ia7a77b4ac19da768ebe1b0879d7123941f4490b5
Reviewed-on: https://review.whamcloud.com/40243
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Aurelien Degremont <degremoa@amazon.com>
Reviewed-by: Alexey Lyashkov <alexey.lyashkov@hpe.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>

diff --git a/lustre/include/lustre_net.h b/lustre/include/lustre_net.h
index fa18f84..7dad281 100644 (file)
--- a/lustre/include/lustre_net.h
+++ b/lustre/include/lustre_net.h
@@ -2673,11 +2673,6 @@ struct timeout_item;
 typedef int (*timeout_cb_t)(struct timeout_item *, void *);
 int ptlrpc_pinger_add_import(struct obd_import *imp);
 int ptlrpc_pinger_del_import(struct obd_import *imp);
-int ptlrpc_add_timeout_client(time64_t time, enum timeout_event event,
-                             timeout_cb_t cb, void *data,
-                             struct list_head *obd_list);
-int ptlrpc_del_timeout_client(struct list_head *obd_list,
-                              enum timeout_event event);
 struct ptlrpc_request * ptlrpc_prep_ping(struct obd_import *imp);
 int ptlrpc_obd_ping(struct obd_device *obd);
 void ping_evictor_start(void);

diff --git a/lustre/ptlrpc/pinger.c b/lustre/ptlrpc/pinger.c
index 6fecf81..ca13f96 100644 (file)
--- a/lustre/ptlrpc/pinger.c
+++ b/lustre/ptlrpc/pinger.c
@@ -49,8 +49,6 @@ MODULE_PARM_DESC(suppress_pings, "Suppress pings");
 struct mutex pinger_mutex;
 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(void)
 {
@@ -175,20 +173,8 @@ static inline time64_t ptlrpc_next_reconnect(struct obd_import *imp)
 
 static time64_t pinger_check_timeout(time64_t time)
 {
-       struct timeout_item *item;
        time64_t timeout = PING_INTERVAL;
 
-       /* This list is sorted in increasing timeout order */
-       mutex_lock(&pinger_mutex);
-       list_for_each_entry(item, &timeout_list, ti_chain) {
-               time64_t ti_timeout = item->ti_timeout;
-
-               if (timeout > ti_timeout)
-                       timeout = ti_timeout;
-               break;
-       }
-       mutex_unlock(&pinger_mutex);
-
        return time + timeout - ktime_get_seconds();
 }
 
@@ -272,7 +258,6 @@ static DECLARE_DELAYED_WORK(ping_work, ptlrpc_pinger_main);
 static void ptlrpc_pinger_main(struct work_struct *ws)
 {
        time64_t this_ping, time_after_ping, time_to_next_wake;
-       struct timeout_item *item;
        struct obd_import *imp;
        struct list_head *iter;
 
@@ -280,8 +265,6 @@ static void ptlrpc_pinger_main(struct work_struct *ws)
                this_ping = ktime_get_seconds();
 
                mutex_lock(&pinger_mutex);
-               list_for_each_entry(item, &timeout_list, ti_chain)
-                       item->ti_cb(item, item->ti_cb_data);
 
                list_for_each(iter, &pinger_imports) {
                        imp = list_entry(iter, struct obd_import,
@@ -342,16 +325,12 @@ int ptlrpc_start_pinger(void)
        return 0;
 }
 
-int ptlrpc_pinger_remove_timeouts(void);
-
 int ptlrpc_stop_pinger(void)
 {
 #ifdef CONFIG_LUSTRE_FS_PINGER
        if (!pinger_wq)
                return -EALREADY;
 
-       ptlrpc_pinger_remove_timeouts();
-
        cancel_delayed_work_sync(&ping_work);
        destroy_workqueue(pinger_wq);
        pinger_wq = NULL;
@@ -421,124 +400,6 @@ int ptlrpc_pinger_del_import(struct obd_import *imp)
 }
 EXPORT_SYMBOL(ptlrpc_pinger_del_import);
 
-/**
- * Register a timeout callback to the pinger list, and the callback will
- * be called when timeout happens.
- */
-static struct timeout_item *ptlrpc_new_timeout(time64_t time,
-                                              enum timeout_event event,
-                                              timeout_cb_t cb, void *data)
-{
-       struct timeout_item *ti;
-
-       OBD_ALLOC_PTR(ti);
-       if (!ti)
-               return NULL;
-
-       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;
-       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(time64_t time, enum timeout_event event,
-                              timeout_cb_t cb, void *data)
-{
-       struct timeout_item *item, *tmp;
-
-       LASSERT(mutex_is_locked(&pinger_mutex));
-
-       list_for_each_entry(item, &timeout_list, ti_chain)
-               if (item->ti_event == event)
-                       goto out;
-
-       item = ptlrpc_new_timeout(time, event, cb, data);
-       if (item) {
-               list_for_each_entry_reverse(tmp, &timeout_list, ti_chain) {
-                       if (tmp->ti_timeout < time) {
-                               list_add(&item->ti_chain, &tmp->ti_chain);
-                               goto out;
-                       }
-               }
-               list_add(&item->ti_chain, &timeout_list);
-       }
-out:
-       return item;
-}
-
-/* Add a client_obd to the timeout event list, when timeout(@time)
- * happens, the callback(@cb) will be called.
- */
-int ptlrpc_add_timeout_client(time64_t time, enum timeout_event event,
-                             timeout_cb_t cb, void *data,
-                             struct list_head *obd_list)
-{
-       struct timeout_item *ti;
-
-       mutex_lock(&pinger_mutex);
-       ti = ptlrpc_pinger_register_timeout(time, event, cb, data);
-       if (!ti) {
-               mutex_unlock(&pinger_mutex);
-               return -EINVAL;
-       }
-       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(struct list_head *obd_list,
-                             enum timeout_event event)
-{
-       struct timeout_item *ti = NULL, *item;
-
-       if (list_empty(obd_list))
-               return 0;
-       mutex_lock(&pinger_mutex);
-       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, "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;
-}
-EXPORT_SYMBOL(ptlrpc_del_timeout_client);
-
-int ptlrpc_pinger_remove_timeouts(void)
-{
-       struct timeout_item *item, *tmp;
-
-       mutex_lock(&pinger_mutex);
-       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);
-       return 0;
-}
-
 void ptlrpc_pinger_wake_up(void)
 {
 #ifdef CONFIG_LUSTRE_FS_PINGER