Lines Matching refs:epi
234 struct epitem *epi; member
293 struct epitem *epi= container_of(p, struct epitem, fllink); in unlist_file() local
294 spin_lock(&epi->ffd.file->f_lock); in unlist_file()
298 spin_unlock(&epi->ffd.file->f_lock); in unlist_file()
348 static inline int ep_is_linked(struct epitem *epi) in ep_is_linked() argument
350 return !list_empty(&epi->rdllink); in ep_is_linked()
415 static inline void ep_set_busy_poll_napi_id(struct epitem *epi) in ep_set_busy_poll_napi_id() argument
425 sock = sock_from_file(epi->ffd.file); in ep_set_busy_poll_napi_id()
434 ep = epi->ep; in ep_set_busy_poll_napi_id()
454 static inline void ep_set_busy_poll_napi_id(struct epitem *epi) in ep_set_busy_poll_napi_id() argument
487 static void ep_poll_safewake(struct eventpoll *ep, struct epitem *epi) in ep_poll_safewake() argument
508 if (epi) { in ep_poll_safewake()
509 if ((is_file_epoll(epi->ffd.file))) { in ep_poll_safewake()
510 ep_src = epi->ffd.file->private_data; in ep_poll_safewake()
525 static void ep_poll_safewake(struct eventpoll *ep, struct epitem *epi) in ep_poll_safewake() argument
554 static void ep_unregister_pollwait(struct eventpoll *ep, struct epitem *epi) in ep_unregister_pollwait() argument
556 struct eppoll_entry **p = &epi->pwqlist; in ep_unregister_pollwait()
567 static inline struct wakeup_source *ep_wakeup_source(struct epitem *epi) in ep_wakeup_source() argument
569 return rcu_dereference_check(epi->ws, lockdep_is_held(&epi->ep->mtx)); in ep_wakeup_source()
573 static inline void ep_pm_stay_awake(struct epitem *epi) in ep_pm_stay_awake() argument
575 struct wakeup_source *ws = ep_wakeup_source(epi); in ep_pm_stay_awake()
581 static inline bool ep_has_wakeup_source(struct epitem *epi) in ep_has_wakeup_source() argument
583 return rcu_access_pointer(epi->ws) ? true : false; in ep_has_wakeup_source()
587 static inline void ep_pm_stay_awake_rcu(struct epitem *epi) in ep_pm_stay_awake_rcu() argument
592 ws = rcu_dereference(epi->ws); in ep_pm_stay_awake_rcu()
623 struct epitem *epi, *nepi; in ep_done_scan() local
631 for (nepi = READ_ONCE(ep->ovflist); (epi = nepi) != NULL; in ep_done_scan()
632 nepi = epi->next, epi->next = EP_UNACTIVE_PTR) { in ep_done_scan()
639 if (!ep_is_linked(epi)) { in ep_done_scan()
644 list_add(&epi->rdllink, &ep->rdllist); in ep_done_scan()
645 ep_pm_stay_awake(epi); in ep_done_scan()
671 struct epitem *epi = container_of(head, struct epitem, rcu); in epi_rcu_free() local
672 kmem_cache_free(epi_cache, epi); in epi_rcu_free()
679 static int ep_remove(struct eventpoll *ep, struct epitem *epi) in ep_remove() argument
681 struct file *file = epi->ffd.file; in ep_remove()
690 ep_unregister_pollwait(ep, epi); in ep_remove()
696 if (head->first == &epi->fllink && !epi->fllink.next) { in ep_remove()
705 hlist_del_rcu(&epi->fllink); in ep_remove()
709 rb_erase_cached(&epi->rbn, &ep->rbr); in ep_remove()
712 if (ep_is_linked(epi)) in ep_remove()
713 list_del_init(&epi->rdllink); in ep_remove()
716 wakeup_source_unregister(ep_wakeup_source(epi)); in ep_remove()
724 call_rcu(&epi->rcu, epi_rcu_free); in ep_remove()
734 struct epitem *epi; in ep_free() local
754 epi = rb_entry(rbp, struct epitem, rbn); in ep_free()
756 ep_unregister_pollwait(ep, epi); in ep_free()
770 epi = rb_entry(rbp, struct epitem, rbn); in ep_free()
771 ep_remove(ep, epi); in ep_free()
793 static __poll_t ep_item_poll(const struct epitem *epi, poll_table *pt, int depth);
799 struct epitem *epi, *tmp; in __ep_eventpoll_poll() local
814 list_for_each_entry_safe(epi, tmp, &txlist, rdllink) { in __ep_eventpoll_poll()
815 if (ep_item_poll(epi, &pt, depth + 1)) { in __ep_eventpoll_poll()
824 __pm_relax(ep_wakeup_source(epi)); in __ep_eventpoll_poll()
825 list_del_init(&epi->rdllink); in __ep_eventpoll_poll()
838 static __poll_t ep_item_poll(const struct epitem *epi, poll_table *pt, in ep_item_poll() argument
841 struct file *file = epi->ffd.file; in ep_item_poll()
844 pt->_key = epi->event.events; in ep_item_poll()
849 return res & epi->event.events; in ep_item_poll()
865 struct epitem *epi = rb_entry(rbp, struct epitem, rbn); in ep_show_fdinfo() local
866 struct inode *inode = file_inode(epi->ffd.file); in ep_show_fdinfo()
870 epi->ffd.fd, epi->event.events, in ep_show_fdinfo()
871 (long long)epi->event.data, in ep_show_fdinfo()
872 (long long)epi->ffd.file->f_pos, in ep_show_fdinfo()
899 struct epitem *epi; in eventpoll_release_file() local
920 hlist_for_each_entry_safe(epi, next, file->f_ep, fllink) { in eventpoll_release_file()
921 ep = epi->ep; in eventpoll_release_file()
923 ep_remove(ep, epi); in eventpoll_release_file()
968 struct epitem *epi, *epir = NULL; in ep_find() local
973 epi = rb_entry(rbp, struct epitem, rbn); in ep_find()
974 kcmp = ep_cmp_ffd(&ffd, &epi->ffd); in ep_find()
980 epir = epi; in ep_find()
992 struct epitem *epi; in ep_find_tfd() local
995 epi = rb_entry(rbp, struct epitem, rbn); in ep_find_tfd()
996 if (epi->ffd.fd == tfd) { in ep_find_tfd()
998 return epi; in ep_find_tfd()
1013 struct epitem *epi; in get_epoll_tfile_raw_ptr() local
1021 epi = ep_find_tfd(ep, tfd, toff); in get_epoll_tfile_raw_ptr()
1022 if (epi) in get_epoll_tfile_raw_ptr()
1023 file_raw = epi->ffd.file; in get_epoll_tfile_raw_ptr()
1091 static inline bool chain_epi_lockless(struct epitem *epi) in chain_epi_lockless() argument
1093 struct eventpoll *ep = epi->ep; in chain_epi_lockless()
1096 if (epi->next != EP_UNACTIVE_PTR) in chain_epi_lockless()
1100 if (cmpxchg(&epi->next, EP_UNACTIVE_PTR, NULL) != EP_UNACTIVE_PTR) in chain_epi_lockless()
1104 epi->next = xchg(&ep->ovflist, epi); in chain_epi_lockless()
1130 struct epitem *epi = ep_item_from_wait(wait); in ep_poll_callback() local
1131 struct eventpoll *ep = epi->ep; in ep_poll_callback()
1138 ep_set_busy_poll_napi_id(epi); in ep_poll_callback()
1146 if (!(epi->event.events & ~EP_PRIVATE_BITS)) in ep_poll_callback()
1155 if (pollflags && !(pollflags & epi->event.events)) in ep_poll_callback()
1165 if (chain_epi_lockless(epi)) in ep_poll_callback()
1166 ep_pm_stay_awake_rcu(epi); in ep_poll_callback()
1167 } else if (!ep_is_linked(epi)) { in ep_poll_callback()
1169 if (list_add_tail_lockless(&epi->rdllink, &ep->rdllist)) in ep_poll_callback()
1170 ep_pm_stay_awake_rcu(epi); in ep_poll_callback()
1178 if ((epi->event.events & EPOLLEXCLUSIVE) && in ep_poll_callback()
1182 if (epi->event.events & EPOLLIN) in ep_poll_callback()
1186 if (epi->event.events & EPOLLOUT) in ep_poll_callback()
1204 ep_poll_safewake(ep, epi); in ep_poll_callback()
1206 if (!(epi->event.events & EPOLLEXCLUSIVE)) in ep_poll_callback()
1236 struct epitem *epi = epq->epi; in ep_ptable_queue_proc() local
1239 if (unlikely(!epi)) // an earlier allocation has failed in ep_ptable_queue_proc()
1244 epq->epi = NULL; in ep_ptable_queue_proc()
1250 pwq->base = epi; in ep_ptable_queue_proc()
1251 if (epi->event.events & EPOLLEXCLUSIVE) in ep_ptable_queue_proc()
1255 pwq->next = epi->pwqlist; in ep_ptable_queue_proc()
1256 epi->pwqlist = pwq; in ep_ptable_queue_proc()
1259 static void ep_rbtree_insert(struct eventpoll *ep, struct epitem *epi) in ep_rbtree_insert() argument
1269 kcmp = ep_cmp_ffd(&epi->ffd, &epic->ffd); in ep_rbtree_insert()
1276 rb_link_node(&epi->rbn, parent, p); in ep_rbtree_insert()
1277 rb_insert_color_cached(&epi->rbn, &ep->rbr, leftmost); in ep_rbtree_insert()
1319 struct epitem *epi; in reverse_path_check_proc() local
1325 hlist_for_each_entry_rcu(epi, refs, fllink) { in reverse_path_check_proc()
1326 struct hlist_head *refs = &epi->ep->refs; in reverse_path_check_proc()
1363 static int ep_create_wakeup_source(struct epitem *epi) in ep_create_wakeup_source() argument
1368 if (!epi->ep->ws) { in ep_create_wakeup_source()
1369 epi->ep->ws = wakeup_source_register(NULL, "eventpoll"); in ep_create_wakeup_source()
1370 if (!epi->ep->ws) in ep_create_wakeup_source()
1374 take_dentry_name_snapshot(&n, epi->ffd.file->f_path.dentry); in ep_create_wakeup_source()
1380 rcu_assign_pointer(epi->ws, ws); in ep_create_wakeup_source()
1386 static noinline void ep_destroy_wakeup_source(struct epitem *epi) in ep_destroy_wakeup_source() argument
1388 struct wakeup_source *ws = ep_wakeup_source(epi); in ep_destroy_wakeup_source()
1390 RCU_INIT_POINTER(epi->ws, NULL); in ep_destroy_wakeup_source()
1401 static int attach_epitem(struct file *file, struct epitem *epi) in attach_epitem() argument
1428 hlist_add_head_rcu(&epi->fllink, file->f_ep); in attach_epitem()
1442 struct epitem *epi; in ep_insert() local
1456 if (!(epi = kmem_cache_zalloc(epi_cache, GFP_KERNEL))) { in ep_insert()
1462 INIT_LIST_HEAD(&epi->rdllink); in ep_insert()
1463 epi->ep = ep; in ep_insert()
1464 ep_set_ffd(&epi->ffd, tfile, fd); in ep_insert()
1465 epi->event = *event; in ep_insert()
1466 epi->next = EP_UNACTIVE_PTR; in ep_insert()
1471 if (unlikely(attach_epitem(tfile, epi) < 0)) { in ep_insert()
1474 kmem_cache_free(epi_cache, epi); in ep_insert()
1486 ep_rbtree_insert(ep, epi); in ep_insert()
1492 ep_remove(ep, epi); in ep_insert()
1496 if (epi->event.events & EPOLLWAKEUP) { in ep_insert()
1497 error = ep_create_wakeup_source(epi); in ep_insert()
1499 ep_remove(ep, epi); in ep_insert()
1505 epq.epi = epi; in ep_insert()
1515 revents = ep_item_poll(epi, &epq.pt, 1); in ep_insert()
1522 if (unlikely(!epq.epi)) { in ep_insert()
1523 ep_remove(ep, epi); in ep_insert()
1531 ep_set_busy_poll_napi_id(epi); in ep_insert()
1534 if (revents && !ep_is_linked(epi)) { in ep_insert()
1535 list_add_tail(&epi->rdllink, &ep->rdllist); in ep_insert()
1536 ep_pm_stay_awake(epi); in ep_insert()
1558 static int ep_modify(struct eventpoll *ep, struct epitem *epi, in ep_modify() argument
1573 epi->event.events = event->events; /* need barrier below */ in ep_modify()
1574 epi->event.data = event->data; /* protected by mtx */ in ep_modify()
1575 if (epi->event.events & EPOLLWAKEUP) { in ep_modify()
1576 if (!ep_has_wakeup_source(epi)) in ep_modify()
1577 ep_create_wakeup_source(epi); in ep_modify()
1578 } else if (ep_has_wakeup_source(epi)) { in ep_modify()
1579 ep_destroy_wakeup_source(epi); in ep_modify()
1608 if (ep_item_poll(epi, &pt, 1)) { in ep_modify()
1610 if (!ep_is_linked(epi)) { in ep_modify()
1611 list_add_tail(&epi->rdllink, &ep->rdllist); in ep_modify()
1612 ep_pm_stay_awake(epi); in ep_modify()
1633 struct epitem *epi, *tmp; in ep_send_events() local
1655 list_for_each_entry_safe(epi, tmp, &txlist, rdllink) { in ep_send_events()
1671 ws = ep_wakeup_source(epi); in ep_send_events()
1678 list_del_init(&epi->rdllink); in ep_send_events()
1685 revents = ep_item_poll(epi, &pt, 1); in ep_send_events()
1689 events = epoll_put_uevent(revents, epi->event.data, events); in ep_send_events()
1691 list_add(&epi->rdllink, &txlist); in ep_send_events()
1692 ep_pm_stay_awake(epi); in ep_send_events()
1698 if (epi->event.events & EPOLLONESHOT) in ep_send_events()
1699 epi->event.events &= EP_PRIVATE_BITS; in ep_send_events()
1700 else if (!(epi->event.events & EPOLLET)) { in ep_send_events()
1712 list_add_tail(&epi->rdllink, &ep->rdllist); in ep_send_events()
1713 ep_pm_stay_awake(epi); in ep_send_events()
1893 struct epitem *epi; in ep_loop_check_proc() local
1898 epi = rb_entry(rbp, struct epitem, rbn); in ep_loop_check_proc()
1899 if (unlikely(is_file_epoll(epi->ffd.file))) { in ep_loop_check_proc()
1901 ep_tovisit = epi->ffd.file->private_data; in ep_loop_check_proc()
1919 list_file(epi->ffd.file); in ep_loop_check_proc()
2033 struct epitem *epi; in do_epoll_ctl() local
2127 epi = ep_find(ep, tf.file, fd); in do_epoll_ctl()
2132 if (!epi) { in do_epoll_ctl()
2139 if (epi) in do_epoll_ctl()
2140 error = ep_remove(ep, epi); in do_epoll_ctl()
2145 if (epi) { in do_epoll_ctl()
2146 if (!(epi->event.events & EPOLLEXCLUSIVE)) { in do_epoll_ctl()
2148 error = ep_modify(ep, epi, epds); in do_epoll_ctl()