28 	struct fuse_ring_ent *ent;  member
39 	pdu->ent = ring_ent;  in uring_cmd_set_ring_ent()
47 	return pdu->ent;  in uring_cmd_to_ring_ent()
78 static void fuse_uring_req_end(struct fuse_ring_ent *ent, struct fuse_req *req,  in fuse_uring_req_end()  argument
81 	struct fuse_ring_queue *queue = ent->queue;  in fuse_uring_req_end()
87 	ent->fuse_req = NULL;  in fuse_uring_req_end()
180 		struct fuse_ring_ent *ent, *next;  in fuse_uring_destruct()  local
190 		list_for_each_entry_safe(ent, next, &queue->ent_released,  in fuse_uring_destruct()
192 			list_del_init(&ent->list);  in fuse_uring_destruct()
193 			kfree(ent);  in fuse_uring_destruct()
310 static void fuse_uring_entry_teardown(struct fuse_ring_ent *ent)  in fuse_uring_entry_teardown()  argument
315 	struct fuse_ring_queue *queue = ent->queue;  in fuse_uring_entry_teardown()
318 	cmd = ent->cmd;  in fuse_uring_entry_teardown()
319 	ent->cmd = NULL;  in fuse_uring_entry_teardown()
320 	req = ent->fuse_req;  in fuse_uring_entry_teardown()
321 	ent->fuse_req = NULL;  in fuse_uring_entry_teardown()
333 	list_move(&ent->list, &queue->ent_released);  in fuse_uring_entry_teardown()
334 	ent->state = FRRS_RELEASED;  in fuse_uring_entry_teardown()
349 	struct fuse_ring_ent *ent, *next;  in fuse_uring_stop_list_entries()  local
354 	list_for_each_entry_safe(ent, next, head, list) {  in fuse_uring_stop_list_entries()
355 		if (ent->state != exp_state) {  in fuse_uring_stop_list_entries()
357 				queue->qid, ent->state, exp_state);  in fuse_uring_stop_list_entries()
361 		ent->state = FRRS_TEARDOWN;  in fuse_uring_stop_list_entries()
362 		list_move(&ent->list, &to_teardown);  in fuse_uring_stop_list_entries()
367 	list_for_each_entry_safe(ent, next, &to_teardown, list) {  in fuse_uring_stop_list_entries()
368 		fuse_uring_entry_teardown(ent);  in fuse_uring_stop_list_entries()
388 	struct fuse_ring_ent *ent;  in fuse_uring_log_ent_state()  local
401 		list_for_each_entry(ent, &queue->ent_w_req_queue, list) {  in fuse_uring_log_ent_state()
403 				ring, qid, ent, ent->state);  in fuse_uring_log_ent_state()
405 		list_for_each_entry(ent, &queue->ent_commit_queue, list) {  in fuse_uring_log_ent_state()
407 				ring, qid, ent, ent->state);  in fuse_uring_log_ent_state()
485 	struct fuse_ring_ent *ent = uring_cmd_to_ring_ent(cmd);  in fuse_uring_cancel()  local
493 	queue = ent->queue;  in fuse_uring_cancel()
495 	if (ent->state == FRRS_AVAILABLE) {  in fuse_uring_cancel()
496 		ent->state = FRRS_USERSPACE;  in fuse_uring_cancel()
497 		list_move(&ent->list, &queue->ent_in_userspace);  in fuse_uring_cancel()
499 		ent->cmd = NULL;  in fuse_uring_cancel()
562 				     struct fuse_ring_ent *ent)  in fuse_uring_copy_from_ring()  argument
570 	err = copy_from_user(&ring_in_out, &ent->headers->ring_ent_in_out,  in fuse_uring_copy_from_ring()
575 	err = import_ubuf(ITER_SOURCE, ent->payload, ring->max_payload_sz,  in fuse_uring_copy_from_ring()
591 				   struct fuse_ring_ent *ent)  in fuse_uring_args_to_ring()  argument
604 	err = import_ubuf(ITER_DEST, ent->payload, ring->max_payload_sz, &iter);  in fuse_uring_args_to_ring()
620 			err = copy_to_user(&ent->headers->op_in, in_args->value,  in fuse_uring_args_to_ring()
641 	err = copy_to_user(&ent->headers->ring_ent_in_out, &ent_in_out,  in fuse_uring_args_to_ring()
646 static int fuse_uring_copy_to_ring(struct fuse_ring_ent *ent,  in fuse_uring_copy_to_ring()  argument
649 	struct fuse_ring_queue *queue = ent->queue;  in fuse_uring_copy_to_ring()
654 	if (WARN_ON(ent->state != FRRS_FUSE_REQ)) {  in fuse_uring_copy_to_ring()
656 		       queue->qid, ent, ent->state);  in fuse_uring_copy_to_ring()
665 	err = fuse_uring_args_to_ring(ring, req, ent);  in fuse_uring_copy_to_ring()
672 	err = copy_to_user(&ent->headers->in_out, &req->in.h,  in fuse_uring_copy_to_ring()
682 static int fuse_uring_prepare_send(struct fuse_ring_ent *ent,  in fuse_uring_prepare_send()  argument
687 	err = fuse_uring_copy_to_ring(ent, req);  in fuse_uring_prepare_send()
691 		fuse_uring_req_end(ent, req, err);  in fuse_uring_prepare_send()
701 static int fuse_uring_send_next_to_ring(struct fuse_ring_ent *ent,  in fuse_uring_send_next_to_ring()  argument
705 	struct fuse_ring_queue *queue = ent->queue;  in fuse_uring_send_next_to_ring()
709 	err = fuse_uring_prepare_send(ent, req);  in fuse_uring_send_next_to_ring()
714 	cmd = ent->cmd;  in fuse_uring_send_next_to_ring()
715 	ent->cmd = NULL;  in fuse_uring_send_next_to_ring()
716 	ent->state = FRRS_USERSPACE;  in fuse_uring_send_next_to_ring()
717 	list_move(&ent->list, &queue->ent_in_userspace);  in fuse_uring_send_next_to_ring()
727 static void fuse_uring_ent_avail(struct fuse_ring_ent *ent,  in fuse_uring_ent_avail()  argument
730 	WARN_ON_ONCE(!ent->cmd);  in fuse_uring_ent_avail()
731 	list_move(&ent->list, &queue->ent_avail_queue);  in fuse_uring_ent_avail()
732 	ent->state = FRRS_AVAILABLE;  in fuse_uring_ent_avail()
736 static void fuse_uring_add_to_pq(struct fuse_ring_ent *ent,  in fuse_uring_add_to_pq()  argument
739 	struct fuse_ring_queue *queue = ent->queue;  in fuse_uring_add_to_pq()
743 	req->ring_entry = ent;  in fuse_uring_add_to_pq()
751 static void fuse_uring_add_req_to_ring_ent(struct fuse_ring_ent *ent,  in fuse_uring_add_req_to_ring_ent()  argument
754 	struct fuse_ring_queue *queue = ent->queue;  in fuse_uring_add_req_to_ring_ent()
758 	if (WARN_ON_ONCE(ent->state != FRRS_AVAILABLE &&  in fuse_uring_add_req_to_ring_ent()
759 			 ent->state != FRRS_COMMIT)) {  in fuse_uring_add_req_to_ring_ent()
760 		pr_warn("%s qid=%d state=%d\n", __func__, ent->queue->qid,  in fuse_uring_add_req_to_ring_ent()
761 			ent->state);  in fuse_uring_add_req_to_ring_ent()
765 	ent->fuse_req = req;  in fuse_uring_add_req_to_ring_ent()
766 	ent->state = FRRS_FUSE_REQ;  in fuse_uring_add_req_to_ring_ent()
767 	list_move(&ent->list, &queue->ent_w_req_queue);  in fuse_uring_add_req_to_ring_ent()
768 	fuse_uring_add_to_pq(ent, req);  in fuse_uring_add_req_to_ring_ent()
772 static struct fuse_req *fuse_uring_ent_assign_req(struct fuse_ring_ent *ent)  in fuse_uring_ent_assign_req()  argument
776 	struct fuse_ring_queue *queue = ent->queue;  in fuse_uring_ent_assign_req()
784 		fuse_uring_add_req_to_ring_ent(ent, req);  in fuse_uring_ent_assign_req()
794 static void fuse_uring_commit(struct fuse_ring_ent *ent, struct fuse_req *req,  in fuse_uring_commit()  argument
797 	struct fuse_ring *ring = ent->queue->ring;  in fuse_uring_commit()
801 	err = copy_from_user(&req->out.h, &ent->headers->in_out,  in fuse_uring_commit()
814 	err = fuse_uring_copy_from_ring(ring, req, ent);  in fuse_uring_commit()
816 	fuse_uring_req_end(ent, req, err);  in fuse_uring_commit()
822 static void fuse_uring_next_fuse_req(struct fuse_ring_ent *ent,  in fuse_uring_next_fuse_req()  argument
831 	fuse_uring_ent_avail(ent, queue);  in fuse_uring_next_fuse_req()
832 	req = fuse_uring_ent_assign_req(ent);  in fuse_uring_next_fuse_req()
836 		err = fuse_uring_send_next_to_ring(ent, req, issue_flags);  in fuse_uring_next_fuse_req()
842 static int fuse_ring_ent_set_commit(struct fuse_ring_ent *ent)  in fuse_ring_ent_set_commit()  argument
844 	struct fuse_ring_queue *queue = ent->queue;  in fuse_ring_ent_set_commit()
848 	if (WARN_ON_ONCE(ent->state != FRRS_USERSPACE))  in fuse_ring_ent_set_commit()
851 	ent->state = FRRS_COMMIT;  in fuse_ring_ent_set_commit()
852 	list_move(&ent->list, &queue->ent_commit_queue);  in fuse_ring_ent_set_commit()
862 	struct fuse_ring_ent *ent;  in fuse_uring_commit_fetch()  local
901 	ent = req->ring_entry;  in fuse_uring_commit_fetch()
904 	err = fuse_ring_ent_set_commit(ent);  in fuse_uring_commit_fetch()
907 				    queue->qid, commit_id, ent->state);  in fuse_uring_commit_fetch()
915 	ent->cmd = cmd;  in fuse_uring_commit_fetch()
919 	fuse_uring_prepare_cancel(cmd, issue_flags, ent);  in fuse_uring_commit_fetch()
920 	fuse_uring_commit(ent, req, issue_flags);  in fuse_uring_commit_fetch()
928 	fuse_uring_next_fuse_req(ent, queue, issue_flags);  in fuse_uring_commit_fetch()
960 static void fuse_uring_do_register(struct fuse_ring_ent *ent,  in fuse_uring_do_register()  argument
964 	struct fuse_ring_queue *queue = ent->queue;  in fuse_uring_do_register()
969 	fuse_uring_prepare_cancel(cmd, issue_flags, ent);  in fuse_uring_do_register()
972 	ent->cmd = cmd;  in fuse_uring_do_register()
973 	fuse_uring_ent_avail(ent, queue);  in fuse_uring_do_register()
1018 	struct fuse_ring_ent *ent;  in fuse_uring_create_ring_ent()  local
1044 	ent = kzalloc(sizeof(*ent), GFP_KERNEL_ACCOUNT);  in fuse_uring_create_ring_ent()
1045 	if (!ent)  in fuse_uring_create_ring_ent()
1048 	INIT_LIST_HEAD(&ent->list);  in fuse_uring_create_ring_ent()
1050 	ent->queue = queue;  in fuse_uring_create_ring_ent()
1051 	ent->headers = iov[0].iov_base;  in fuse_uring_create_ring_ent()
1052 	ent->payload = iov[1].iov_base;  in fuse_uring_create_ring_ent()
1055 	return ent;  in fuse_uring_create_ring_ent()
1068 	struct fuse_ring_ent *ent;  in fuse_uring_register()  local
1096 	ent = fuse_uring_create_ring_ent(cmd, queue);  in fuse_uring_register()
1097 	if (IS_ERR(ent))  in fuse_uring_register()
1098 		return PTR_ERR(ent);  in fuse_uring_register()
1100 	fuse_uring_do_register(ent, cmd, issue_flags);  in fuse_uring_register()
1176 static void fuse_uring_send(struct fuse_ring_ent *ent, struct io_uring_cmd *cmd,  in fuse_uring_send()  argument
1179 	struct fuse_ring_queue *queue = ent->queue;  in fuse_uring_send()
1182 	ent->state = FRRS_USERSPACE;  in fuse_uring_send()
1183 	list_move(&ent->list, &queue->ent_in_userspace);  in fuse_uring_send()
1184 	ent->cmd = NULL;  in fuse_uring_send()
1198 	struct fuse_ring_ent *ent = uring_cmd_to_ring_ent(cmd);  in fuse_uring_send_in_task()  local
1199 	struct fuse_ring_queue *queue = ent->queue;  in fuse_uring_send_in_task()
1203 		err = fuse_uring_prepare_send(ent, ent->fuse_req);  in fuse_uring_send_in_task()
1205 			fuse_uring_next_fuse_req(ent, queue, issue_flags);  in fuse_uring_send_in_task()
1212 	fuse_uring_send(ent, cmd, err, issue_flags);  in fuse_uring_send_in_task()
1233 static void fuse_uring_dispatch_ent(struct fuse_ring_ent *ent)  in fuse_uring_dispatch_ent()  argument
1235 	struct io_uring_cmd *cmd = ent->cmd;  in fuse_uring_dispatch_ent()
1237 	uring_cmd_set_ring_ent(cmd, ent);  in fuse_uring_dispatch_ent()
1247 	struct fuse_ring_ent *ent = NULL;  in fuse_uring_queue_fuse_req()  local
1265 	ent = list_first_entry_or_null(&queue->ent_avail_queue,  in fuse_uring_queue_fuse_req()
1267 	if (ent)  in fuse_uring_queue_fuse_req()
1268 		fuse_uring_add_req_to_ring_ent(ent, req);  in fuse_uring_queue_fuse_req()
1273 	if (ent)  in fuse_uring_queue_fuse_req()
1274 		fuse_uring_dispatch_ent(ent);  in fuse_uring_queue_fuse_req()
1291 	struct fuse_ring_ent *ent = NULL;  in fuse_uring_queue_bq_req()  local
1307 	ent = list_first_entry_or_null(&queue->ent_avail_queue,  in fuse_uring_queue_bq_req()
1323 	if (ent && req) {  in fuse_uring_queue_bq_req()
1324 		fuse_uring_add_req_to_ring_ent(ent, req);  in fuse_uring_queue_bq_req()
1327 		fuse_uring_dispatch_ent(ent);  in fuse_uring_queue_bq_req()