[fuse] Fix accounting the number of waiting requests

Properly accounting the number of waiting requests was forgotten in
"clean up request accounting" patch.

Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>

2 files changed, 22 insertions, 6 deletions

diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index d4efb6223e2c..8538b298a6b0 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -92,30 +92,39 @@ struct fuse_req *fuse_get_req(struct fuse_conn *fc)
 {
         struct fuse_req *req;
         sigset_t oldset;
+        int intr;
         int err;
 
+        atomic_inc(&fc->num_waiting);
         block_sigs(&oldset);
-        err = wait_event_interruptible(fc->blocked_waitq, !fc->blocked);
+        intr = wait_event_interruptible(fc->blocked_waitq, !fc->blocked);
         restore_sigs(&oldset);
-        if (err)
-                return ERR_PTR(-EINTR);
+        err = -EINTR;
+        if (intr)
+                goto out;
 
         req = fuse_request_alloc();
+        err = -ENOMEM;
         if (!req)
-                return ERR_PTR(-ENOMEM);
+                goto out;
 
-        atomic_inc(&fc->num_waiting);
         fuse_request_init(req);
         req->in.h.uid = current->fsuid;
         req->in.h.gid = current->fsgid;
         req->in.h.pid = current->pid;
+        req->waiting = 1;
         return req;
+
+ out:
+        atomic_dec(&fc->num_waiting);
+        return ERR_PTR(err);
 }
 
 void fuse_put_request(struct fuse_conn *fc, struct fuse_req *req)
 {
         if (atomic_dec_and_test(&req->count)) {
-                atomic_dec(&fc->num_waiting);
+                if (req->waiting)
+                        atomic_dec(&fc->num_waiting);
                 fuse_request_free(req);
         }
 }
@@ -281,6 +290,10 @@ static void queue_request(struct fuse_conn *fc, struct fuse_req *req)
                 len_args(req->in.numargs, (struct fuse_arg *) req->in.args);
         list_add_tail(&req->list, &fc->pending);
         req->state = FUSE_REQ_PENDING;
+        if (!req->waiting) {
+                req->waiting = 1;
+                atomic_inc(&fc->num_waiting);
+        }
         wake_up(&fc->waitq);
         kill_fasync(&fc->fasync, SIGIO, POLL_IN);
 }
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index ee9b83042510..59661c481d9d 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -159,6 +159,9 @@ struct fuse_req {
         /** Data is being copied to/from the request */
         unsigned locked:1;
 
+        /** Request is counted as "waiting" */
+        unsigned waiting:1;
+
         /** State of the request */
         enum fuse_req_state state;