FS-Cache: Count culled objects and objects rejected due to lack of space

[firefly-linux-kernel-4.4.55.git] / fs / fscache / object.c

diff --git a/fs/fscache/object.c b/fs/fscache/object.c
index da032daf0e0d7562f40e5a050685829af68869ac..12bb468bf0aebf4823381bcce6d6cee9d4df678e 100644 (file)
--- a/fs/fscache/object.c
+++ b/fs/fscache/object.c
@@ -1016,3 +1016,50 @@ static const struct fscache_state *fscache_update_object(struct fscache_object *
        _leave("");
        return transit_to(WAIT_FOR_CMD);
 }
+
+/**
+ * fscache_object_retrying_stale - Note retrying stale object
+ * @object: The object that will be retried
+ *
+ * Note that an object lookup found an on-disk object that was adjudged to be
+ * stale and has been deleted.  The lookup will be retried.
+ */
+void fscache_object_retrying_stale(struct fscache_object *object)
+{
+       fscache_stat(&fscache_n_cache_no_space_reject);
+}
+EXPORT_SYMBOL(fscache_object_retrying_stale);
+
+/**
+ * fscache_object_mark_killed - Note that an object was killed
+ * @object: The object that was culled
+ * @why: The reason the object was killed.
+ *
+ * Note that an object was killed.  Returns true if the object was
+ * already marked killed, false if it wasn't.
+ */
+void fscache_object_mark_killed(struct fscache_object *object,
+                               enum fscache_why_object_killed why)
+{
+       if (test_and_set_bit(FSCACHE_OBJECT_KILLED_BY_CACHE, &object->flags)) {
+               pr_err("Error: Object already killed by cache [%s]\n",
+                      object->cache->identifier);
+               return;
+       }
+
+       switch (why) {
+       case FSCACHE_OBJECT_NO_SPACE:
+               fscache_stat(&fscache_n_cache_no_space_reject);
+               break;
+       case FSCACHE_OBJECT_IS_STALE:
+               fscache_stat(&fscache_n_cache_stale_objects);
+               break;
+       case FSCACHE_OBJECT_WAS_RETIRED:
+               fscache_stat(&fscache_n_cache_retired_objects);
+               break;
+       case FSCACHE_OBJECT_WAS_CULLED:
+               fscache_stat(&fscache_n_cache_culled_objects);
+               break;
+       }
+}
+EXPORT_SYMBOL(fscache_object_mark_killed);