yaffs direct: Expose background garbage collection

[yaffs2.git] / direct / yaffsfs.c

diff --git a/direct/yaffsfs.c b/direct/yaffsfs.c
index a01155ff9320b66051e465d6809aaa14b792e654..9db29b99aec583c7be6b22def918107bcb4d934b 100644 (file)
--- a/direct/yaffsfs.c
+++ b/direct/yaffsfs.c
@@ -2888,6 +2888,57 @@ int yaffs_sync(const YCHAR *path)
        return yaffs_sync_common(NULL, path);
 }
 
+
+static int yaffsfs_bg_gc_common(struct yaffs_dev *dev,
+                               const YCHAR *path,
+                               int urgency)
+{
+       int retVal = -1;
+       YCHAR *dummy;
+
+       if (!dev) {
+               if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
+                       yaffsfs_SetError(-EFAULT);
+                       return -1;
+               }
+
+               if (yaffsfs_CheckPath(path) < 0) {
+                       yaffsfs_SetError(-ENAMETOOLONG);
+                       return -1;
+               }
+       }
+
+       yaffsfs_Lock();
+       if (!dev)
+               dev = yaffsfs_FindDevice(path, &dummy);
+
+       if (dev) {
+               if (!dev->is_mounted)
+                       yaffsfs_SetError(-EINVAL);
+               else
+                       retVal = yaffs_bg_gc(dev, urgency);
+       } else
+               yaffsfs_SetError(-ENODEV);
+
+       yaffsfs_Unlock();
+       return retVal;
+}
+
+/* Background gc functions.
+ * These return 0 when bg done or greater than 0 when gc has been
+ * done and there is still a lot of garbage to be cleaned up.
+ */
+
+int yaffs_do_background_gc(const YCHAR *path, int urgency)
+{
+       return yaffsfs_bg_gc_common(NULL, path, urgency);
+}
+
+int yaffs_do_background_gc_reldev(struct yaffs_dev *dev, int urgency)
+{
+       return yaffsfs_bg_gc_common(dev, NULL, urgency);
+}
+
 static int yaffsfs_IsDevBusy(struct yaffs_dev *dev)
 {
        int i;