fuse: move request timeout code to a new source file

This marks the first step in cleanly separating the transport layer from
the filesystem layer.

Add "dev.h", which will contain the interface definition for the transport
layer.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

1 files changed, 0 insertions, 94 deletions

diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index 916c214798ca..0359a7b10393 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -32,100 +32,6 @@ MODULE_ALIAS("devname:fuse");
 
 static struct kmem_cache *fuse_req_cachep;
 
-const unsigned long fuse_timeout_timer_freq =
-	secs_to_jiffies(FUSE_TIMEOUT_TIMER_FREQ);
-
-bool fuse_request_expired(struct fuse_conn *fc, struct list_head *list)
-{
-	struct fuse_req *req;
-
-	req = list_first_entry_or_null(list, struct fuse_req, list);
-	if (!req)
-		return false;
-	return time_is_before_jiffies(req->create_time + fc->timeout.req_timeout);
-}
-
-static bool fuse_fpq_processing_expired(struct fuse_conn *fc, struct list_head *processing)
-{
-	int i;
-
-	for (i = 0; i < FUSE_PQ_HASH_SIZE; i++)
-		if (fuse_request_expired(fc, &processing[i]))
-			return true;
-
-	return false;
-}
-
-/*
- * Check if any requests aren't being completed by the time the request timeout
- * elapses. To do so, we:
- * - check the fiq pending list
- * - check the bg queue
- * - check the fpq io and processing lists
- *
- * To make this fast, we only check against the head request on each list since
- * these are generally queued in order of creation time (eg newer requests get
- * queued to the tail). We might miss a few edge cases (eg requests transitioning
- * between lists, re-sent requests at the head of the pending list having a
- * later creation time than other requests on that list, etc.) but that is fine
- * since if the request never gets fulfilled, it will eventually be caught.
- */
-void fuse_check_timeout(struct work_struct *work)
-{
-	struct delayed_work *dwork = to_delayed_work(work);
-	struct fuse_conn *fc = container_of(dwork, struct fuse_conn,
-					    timeout.work);
-	struct fuse_iqueue *fiq = &fc->iq;
-	struct fuse_dev *fud;
-	struct fuse_pqueue *fpq;
-	bool expired = false;
-
-	if (!atomic_read(&fc->num_waiting))
-	    goto out;
-
-	spin_lock(&fiq->lock);
-	expired = fuse_request_expired(fc, &fiq->pending);
-	spin_unlock(&fiq->lock);
-	if (expired)
-		goto abort_conn;
-
-	spin_lock(&fc->bg_lock);
-	expired = fuse_request_expired(fc, &fc->bg_queue);
-	spin_unlock(&fc->bg_lock);
-	if (expired)
-		goto abort_conn;
-
-	spin_lock(&fc->lock);
-	if (!fc->connected) {
-		spin_unlock(&fc->lock);
-		return;
-	}
-	list_for_each_entry(fud, &fc->devices, entry) {
-		fpq = &fud->pq;
-		spin_lock(&fpq->lock);
-		if (fuse_request_expired(fc, &fpq->io) ||
-		    fuse_fpq_processing_expired(fc, fpq->processing)) {
-			spin_unlock(&fpq->lock);
-			spin_unlock(&fc->lock);
-			goto abort_conn;
-		}
-
-		spin_unlock(&fpq->lock);
-	}
-	spin_unlock(&fc->lock);
-
-	if (fuse_uring_request_expired(fc))
-	    goto abort_conn;
-
-out:
-	queue_delayed_work(system_percpu_wq, &fc->timeout.work,
-			   fuse_timeout_timer_freq);
-	return;
-
-abort_conn:
-	fuse_abort_conn(fc);
-}
-
 static void fuse_request_init(struct fuse_mount *fm, struct fuse_req *req)
 {
 	INIT_LIST_HEAD(&req->list);