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-rw-r--r--fs/fscache/internal.h5
-rw-r--r--fs/fscache/object.c47
-rw-r--r--fs/fscache/stats.c10
3 files changed, 62 insertions, 0 deletions
diff --git a/fs/fscache/internal.h b/fs/fscache/internal.h
index 7872a62ef30c..3063a58b7d3d 100644
--- a/fs/fscache/internal.h
+++ b/fs/fscache/internal.h
@@ -271,6 +271,11 @@ extern atomic_t fscache_n_cop_write_page;
extern atomic_t fscache_n_cop_uncache_page;
extern atomic_t fscache_n_cop_dissociate_pages;
+extern atomic_t fscache_n_cache_no_space_reject;
+extern atomic_t fscache_n_cache_stale_objects;
+extern atomic_t fscache_n_cache_retired_objects;
+extern atomic_t fscache_n_cache_culled_objects;
+
static inline void fscache_stat(atomic_t *stat)
{
atomic_inc(stat);
diff --git a/fs/fscache/object.c b/fs/fscache/object.c
index da032daf0e0d..12bb468bf0ae 100644
--- 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);
diff --git a/fs/fscache/stats.c b/fs/fscache/stats.c
index 40d13c70ef51..3a722e8f2307 100644
--- a/fs/fscache/stats.c
+++ b/fs/fscache/stats.c
@@ -130,6 +130,11 @@ atomic_t fscache_n_cop_write_page;
atomic_t fscache_n_cop_uncache_page;
atomic_t fscache_n_cop_dissociate_pages;
+atomic_t fscache_n_cache_no_space_reject;
+atomic_t fscache_n_cache_stale_objects;
+atomic_t fscache_n_cache_retired_objects;
+atomic_t fscache_n_cache_culled_objects;
+
/*
* display the general statistics
*/
@@ -271,6 +276,11 @@ static int fscache_stats_show(struct seq_file *m, void *v)
atomic_read(&fscache_n_cop_write_page),
atomic_read(&fscache_n_cop_uncache_page),
atomic_read(&fscache_n_cop_dissociate_pages));
+ seq_printf(m, "CacheEv: nsp=%d stl=%d rtr=%d cul=%d\n",
+ atomic_read(&fscache_n_cache_no_space_reject),
+ atomic_read(&fscache_n_cache_stale_objects),
+ atomic_read(&fscache_n_cache_retired_objects),
+ atomic_read(&fscache_n_cache_culled_objects));
return 0;
}