hw/9pfs: Add yield support for open and opendir coroutine

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

hw/9pfs/codir.c

@@ -83,3 +83,19 @@ int v9fs_co_mkdir(V9fsState *s, char *name, mode_t mode, uid_t uid, gid_t gid)
         });
     return err;
 }
+
+int v9fs_co_opendir(V9fsState *s, V9fsFidState *fidp)
+{
+    int err;
+
+    v9fs_co_run_in_worker(
+        {
+            fidp->fs.dir = s->ops->opendir(&s->ctx, fidp->path.data);
+            if (!fidp->fs.dir) {
+                err = -errno;
+            } else {
+                err = 0;
+            }
+        });
+    return err;
+}

hw/9pfs/cofile.c

@@ -44,3 +44,19 @@ int v9fs_co_fstat(V9fsState *s, int fd, struct stat *stbuf)
         });
     return err;
 }
+
+int v9fs_co_open(V9fsState *s, V9fsFidState *fidp, int flags)
+{
+    int err;
+
+    v9fs_co_run_in_worker(
+        {
+            fidp->fs.fd = s->ops->open(&s->ctx, fidp->path.data, flags);
+            if (fidp->fs.fd == -1) {
+                err = -errno;
+            } else {
+                err = 0;
+            }
+        });
+    return err;
+}

hw/9pfs/virtio-9p-coth.h

@@ -77,4 +77,6 @@ extern int v9fs_co_mkdir(V9fsState *, char *, mode_t, uid_t, gid_t);
 extern int v9fs_co_remove(V9fsState *, V9fsString *);
 extern int v9fs_co_rename(V9fsState *, V9fsString *, V9fsString *);
 extern int v9fs_co_fstat(V9fsState *, int, struct stat *);
+extern int v9fs_co_opendir(V9fsState *, V9fsFidState *);
+extern int v9fs_co_open(V9fsState *, V9fsFidState *, int);
 #endif