103 	struct fsnotify_group *group = file->private_data;  in inotify_poll()  local
106 	poll_wait(file, &group->notification_waitq, wait);  in inotify_poll()
107 	spin_lock(&group->notification_lock);  in inotify_poll()
108 	if (!fsnotify_notify_queue_is_empty(group))  in inotify_poll()
110 	spin_unlock(&group->notification_lock);  in inotify_poll()
132 static struct fsnotify_event *get_one_event(struct fsnotify_group *group,  in get_one_event()  argument
138 	if (fsnotify_notify_queue_is_empty(group))  in get_one_event()
141 	event = fsnotify_peek_first_event(group);  in get_one_event()
143 	pr_debug("%s: group=%p event=%p\n", __func__, group, event);  in get_one_event()
151 	fsnotify_remove_first_event(group);  in get_one_event()
162 static ssize_t copy_event_to_user(struct fsnotify_group *group,  in copy_event_to_user()  argument
172 	pr_debug("%s: group=%p event=%p\n", __func__, group, fsn_event);  in copy_event_to_user()
215 	struct fsnotify_group *group;  in inotify_read()  local
222 	group = file->private_data;  in inotify_read()
224 	add_wait_queue(&group->notification_waitq, &wait);  in inotify_read()
226 		spin_lock(&group->notification_lock);  in inotify_read()
227 		kevent = get_one_event(group, count);  in inotify_read()
228 		spin_unlock(&group->notification_lock);  in inotify_read()
230 		pr_debug("%s: group=%p kevent=%p\n", __func__, group, kevent);  in inotify_read()
236 			ret = copy_event_to_user(group, kevent, buf);  in inotify_read()
237 			fsnotify_destroy_event(group, kevent);  in inotify_read()
257 	remove_wait_queue(&group->notification_waitq, &wait);  in inotify_read()
266 	struct fsnotify_group *group = file->private_data;  in inotify_release()  local
268 	pr_debug("%s: group=%p\n", __func__, group);  in inotify_release()
271 	fsnotify_destroy_group(group);  in inotify_release()
279 	struct fsnotify_group *group;  in inotify_ioctl()  local
285 	group = file->private_data;  in inotify_ioctl()
288 	pr_debug("%s: group=%p cmd=%u\n", __func__, group, cmd);  in inotify_ioctl()
292 		spin_lock(&group->notification_lock);  in inotify_ioctl()
293 		list_for_each_entry(fsn_event, &group->notification_list,  in inotify_ioctl()
298 		spin_unlock(&group->notification_lock);  in inotify_ioctl()
307 			data = &group->inotify_data;  in inotify_ioctl()
377 static struct inotify_inode_mark *inotify_idr_find_locked(struct fsnotify_group *group,  in inotify_idr_find_locked()  argument
380 	struct idr *idr = &group->inotify_data.idr;  in inotify_idr_find_locked()
381 	spinlock_t *idr_lock = &group->inotify_data.idr_lock;  in inotify_idr_find_locked()
398 static struct inotify_inode_mark *inotify_idr_find(struct fsnotify_group *group,  in inotify_idr_find()  argument
402 	spinlock_t *idr_lock = &group->inotify_data.idr_lock;  in inotify_idr_find()
405 	i_mark = inotify_idr_find_locked(group, wd);  in inotify_idr_find()
415 static void inotify_remove_from_idr(struct fsnotify_group *group,  in inotify_remove_from_idr()  argument
418 	struct idr *idr = &group->inotify_data.idr;  in inotify_remove_from_idr()
419 	spinlock_t *idr_lock = &group->inotify_data.idr_lock;  in inotify_remove_from_idr()
432 			__func__, i_mark, i_mark->wd, i_mark->fsn_mark.group);  in inotify_remove_from_idr()
437 	found_i_mark = inotify_idr_find_locked(group, wd);  in inotify_remove_from_idr()
440 			__func__, i_mark, i_mark->wd, i_mark->fsn_mark.group);  in inotify_remove_from_idr()
453 			i_mark->wd, i_mark->fsn_mark.group, found_i_mark,  in inotify_remove_from_idr()
454 			found_i_mark->wd, found_i_mark->fsn_mark.group);  in inotify_remove_from_idr()
464 			 __func__, i_mark, i_mark->wd, i_mark->fsn_mark.group);  in inotify_remove_from_idr()
484 				    struct fsnotify_group *group)  in inotify_ignored_and_remove_idr()  argument
493 	inotify_handle_event(group, NULL, FS_IN_IGNORED, NULL,  in inotify_ignored_and_remove_idr()
498 	inotify_remove_from_idr(group, i_mark);  in inotify_ignored_and_remove_idr()
500 	dec_inotify_watches(group->inotify_data.ucounts);  in inotify_ignored_and_remove_idr()
503 static int inotify_update_existing_watch(struct fsnotify_group *group,  in inotify_update_existing_watch()  argument
517 	fsn_mark = fsnotify_find_mark(&inode->i_fsnotify_marks, group);  in inotify_update_existing_watch()
558 static int inotify_new_watch(struct fsnotify_group *group,  in inotify_new_watch()  argument
565 	struct idr *idr = &group->inotify_data.idr;  in inotify_new_watch()
566 	spinlock_t *idr_lock = &group->inotify_data.idr_lock;  in inotify_new_watch()
574 	fsnotify_init_mark(&tmp_i_mark->fsn_mark, group);  in inotify_new_watch()
583 	if (!inc_inotify_watches(group->inotify_data.ucounts)) {  in inotify_new_watch()
584 		inotify_remove_from_idr(group, tmp_i_mark);  in inotify_new_watch()
593 		inotify_remove_from_idr(group, tmp_i_mark);  in inotify_new_watch()
608 static int inotify_update_watch(struct fsnotify_group *group, struct inode *inode, u32 arg)  in inotify_update_watch()  argument
612 	mutex_lock(&group->mark_mutex);  in inotify_update_watch()
614 	ret = inotify_update_existing_watch(group, inode, arg);  in inotify_update_watch()
617 		ret = inotify_new_watch(group, inode, arg);  in inotify_update_watch()
618 	mutex_unlock(&group->mark_mutex);  in inotify_update_watch()
625 	struct fsnotify_group *group;  in inotify_new_group()  local
628 	group = fsnotify_alloc_group(&inotify_fsnotify_ops);  in inotify_new_group()
629 	if (IS_ERR(group))  in inotify_new_group()
630 		return group;  in inotify_new_group()
634 		fsnotify_destroy_group(group);  in inotify_new_group()
637 	group->overflow_event = &oevent->fse;  in inotify_new_group()
638 	fsnotify_init_event(group->overflow_event, NULL);  in inotify_new_group()
644 	group->max_events = max_events;  in inotify_new_group()
645 	group->memcg = get_mem_cgroup_from_mm(current->mm);  in inotify_new_group()
647 	spin_lock_init(&group->inotify_data.idr_lock);  in inotify_new_group()
648 	idr_init(&group->inotify_data.idr);  in inotify_new_group()
649 	group->inotify_data.ucounts = inc_ucount(current_user_ns(),  in inotify_new_group()
653 	if (!group->inotify_data.ucounts) {  in inotify_new_group()
654 		fsnotify_destroy_group(group);  in inotify_new_group()
658 	return group;  in inotify_new_group()
665 	struct fsnotify_group *group;  in do_inotify_init()  local
676 	group = inotify_new_group(inotify_max_queued_events);  in do_inotify_init()
677 	if (IS_ERR(group))  in do_inotify_init()
678 		return PTR_ERR(group);  in do_inotify_init()
680 	ret = anon_inode_getfd("inotify", &inotify_fops, group,  in do_inotify_init()
683 		fsnotify_destroy_group(group);  in do_inotify_init()
701 	struct fsnotify_group *group;  in SYSCALL_DEFINE3()  local
763 	group = f.file->private_data;  in SYSCALL_DEFINE3()
766 	ret = inotify_update_watch(group, inode, mask);  in SYSCALL_DEFINE3()
775 	struct fsnotify_group *group;  in SYSCALL_DEFINE2()  local
789 	group = f.file->private_data;  in SYSCALL_DEFINE2()
792 	i_mark = inotify_idr_find(group, wd);  in SYSCALL_DEFINE2()
798 	fsnotify_destroy_mark(&i_mark->fsn_mark, group);  in SYSCALL_DEFINE2()