1 files changed, 62 insertions, 13 deletions

diff --git a/fs/fuse/dev_uring.c b/fs/fuse/dev_uring.c
index 82bf458fa9db..249b210becb1 100644
--- a/fs/fuse/dev_uring.c
+++ b/fs/fuse/dev_uring.c
@@ -140,6 +140,49 @@ void fuse_uring_abort_end_requests(struct fuse_ring *ring)
 	}
 }
 
+static bool ent_list_request_expired(struct fuse_conn *fc, struct list_head *list)
+{
+	struct fuse_ring_ent *ent;
+	struct fuse_req *req;
+
+	ent = list_first_entry_or_null(list, struct fuse_ring_ent, list);
+	if (!ent)
+		return false;
+
+	req = ent->fuse_req;
+
+	return time_is_before_jiffies(req->create_time +
+				      fc->timeout.req_timeout);
+}
+
+bool fuse_uring_request_expired(struct fuse_conn *fc)
+{
+	struct fuse_ring *ring = fc->ring;
+	struct fuse_ring_queue *queue;
+	int qid;
+
+	if (!ring)
+		return false;
+
+	for (qid = 0; qid < ring->nr_queues; qid++) {
+		queue = READ_ONCE(ring->queues[qid]);
+		if (!queue)
+			continue;
+
+		spin_lock(&queue->lock);
+		if (fuse_request_expired(fc, &queue->fuse_req_queue) ||
+		    fuse_request_expired(fc, &queue->fuse_req_bg_queue) ||
+		    ent_list_request_expired(fc, &queue->ent_w_req_queue) ||
+		    ent_list_request_expired(fc, &queue->ent_in_userspace)) {
+			spin_unlock(&queue->lock);
+			return true;
+		}
+		spin_unlock(&queue->lock);
+	}
+
+	return false;
+}
+
 void fuse_uring_destruct(struct fuse_conn *fc)
 {
 	struct fuse_ring *ring = fc->ring;
@@ -211,7 +254,6 @@ static struct fuse_ring *fuse_uring_create(struct fuse_conn *fc)
 	ring->nr_queues = nr_queues;
 	ring->fc = fc;
 	ring->max_payload_sz = max_payload_size;
-	atomic_set(&ring->queue_refs, 0);
 	smp_store_release(&fc->ring, ring);
 
 	spin_unlock(&fc->lock);
@@ -468,7 +510,7 @@ static void fuse_uring_cancel(struct io_uring_cmd *cmd,
 	spin_lock(&queue->lock);
 	if (ent->state == FRRS_AVAILABLE) {
 		ent->state = FRRS_USERSPACE;
-		list_move(&ent->list, &queue->ent_in_userspace);
+		list_move_tail(&ent->list, &queue->ent_in_userspace);
 		need_cmd_done = true;
 		ent->cmd = NULL;
 	}
@@ -551,8 +593,8 @@ static int fuse_uring_copy_from_ring(struct fuse_ring *ring,
 	if (err)
 		return err;
 
-	fuse_copy_init(&cs, 0, &iter);
-	cs.is_uring = 1;
+	fuse_copy_init(&cs, false, &iter);
+	cs.is_uring = true;
 	cs.req = req;
 
 	return fuse_copy_out_args(&cs, args, ring_in_out.payload_sz);
@@ -581,8 +623,8 @@ static int fuse_uring_args_to_ring(struct fuse_ring *ring, struct fuse_req *req,
 		return err;
 	}
 
-	fuse_copy_init(&cs, 1, &iter);
-	cs.is_uring = 1;
+	fuse_copy_init(&cs, true, &iter);
+	cs.is_uring = true;
 	cs.req = req;
 
 	if (num_args > 0) {
@@ -688,7 +730,7 @@ static int fuse_uring_send_next_to_ring(struct fuse_ring_ent *ent,
 	cmd = ent->cmd;
 	ent->cmd = NULL;
 	ent->state = FRRS_USERSPACE;
-	list_move(&ent->list, &queue->ent_in_userspace);
+	list_move_tail(&ent->list, &queue->ent_in_userspace);
 	spin_unlock(&queue->lock);
 
 	io_uring_cmd_done(cmd, 0, 0, issue_flags);
@@ -726,8 +768,6 @@ static void fuse_uring_add_req_to_ring_ent(struct fuse_ring_ent *ent,
 					   struct fuse_req *req)
 {
 	struct fuse_ring_queue *queue = ent->queue;
-	struct fuse_conn *fc = req->fm->fc;
-	struct fuse_iqueue *fiq = &fc->iq;
 
 	lockdep_assert_held(&queue->lock);
 
@@ -737,12 +777,10 @@ static void fuse_uring_add_req_to_ring_ent(struct fuse_ring_ent *ent,
 			ent->state);
 	}
 
-	spin_lock(&fiq->lock);
 	clear_bit(FR_PENDING, &req->flags);
-	spin_unlock(&fiq->lock);
 	ent->fuse_req = req;
 	ent->state = FRRS_FUSE_REQ;
-	list_move(&ent->list, &queue->ent_w_req_queue);
+	list_move_tail(&ent->list, &queue->ent_w_req_queue);
 	fuse_uring_add_to_pq(ent, req);
 }
 
@@ -1158,7 +1196,7 @@ static void fuse_uring_send(struct fuse_ring_ent *ent, struct io_uring_cmd *cmd,
 
 	spin_lock(&queue->lock);
 	ent->state = FRRS_USERSPACE;
-	list_move(&ent->list, &queue->ent_in_userspace);
+	list_move_tail(&ent->list, &queue->ent_in_userspace);
 	ent->cmd = NULL;
 	spin_unlock(&queue->lock);
 
@@ -1238,6 +1276,8 @@ void fuse_uring_queue_fuse_req(struct fuse_iqueue *fiq, struct fuse_req *req)
 	if (unlikely(queue->stopped))
 		goto err_unlock;
 
+	set_bit(FR_URING, &req->flags);
+	req->ring_queue = queue;
 	ent = list_first_entry_or_null(&queue->ent_avail_queue,
 				       struct fuse_ring_ent, list);
 	if (ent)
@@ -1276,6 +1316,8 @@ bool fuse_uring_queue_bq_req(struct fuse_req *req)
 		return false;
 	}
 
+	set_bit(FR_URING, &req->flags);
+	req->ring_queue = queue;
 	list_add_tail(&req->list, &queue->fuse_req_bg_queue);
 
 	ent = list_first_entry_or_null(&queue->ent_avail_queue,
@@ -1306,6 +1348,13 @@ bool fuse_uring_queue_bq_req(struct fuse_req *req)
 	return true;
 }
 
+bool fuse_uring_remove_pending_req(struct fuse_req *req)
+{
+	struct fuse_ring_queue *queue = req->ring_queue;
+
+	return fuse_remove_pending_req(req, &queue->lock);
+}
+
 static const struct fuse_iqueue_ops fuse_io_uring_ops = {
 	/* should be send over io-uring as enhancement */
 	.send_forget = fuse_dev_queue_forget,