From 19fcec84d8d7d21e796c7624e521b60d28ee21ed Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 20:45:59 +0200
Subject: Adding upstream version 16.2.11+ds.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/tools/immutable_object_cache/SimplePolicy.h | 68 +++++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 src/tools/immutable_object_cache/SimplePolicy.h

(limited to 'src/tools/immutable_object_cache/SimplePolicy.h')

diff --git a/src/tools/immutable_object_cache/SimplePolicy.h b/src/tools/immutable_object_cache/SimplePolicy.h
new file mode 100644
index 000000000..671cbd518
--- /dev/null
+++ b/src/tools/immutable_object_cache/SimplePolicy.h
@@ -0,0 +1,68 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_CACHE_SIMPLE_POLICY_H
+#define CEPH_CACHE_SIMPLE_POLICY_H
+
+#include "common/ceph_context.h"
+#include "common/ceph_mutex.h"
+#include "include/lru.h"
+#include "Policy.h"
+
+#include <unordered_map>
+#include <string>
+
+namespace ceph {
+namespace immutable_obj_cache {
+
+class SimplePolicy : public Policy {
+ public:
+  SimplePolicy(CephContext *cct, uint64_t block_num, uint64_t max_inflight,
+               double watermark);
+  ~SimplePolicy();
+
+  cache_status_t lookup_object(std::string file_name);
+  cache_status_t get_status(std::string file_name);
+
+  void update_status(std::string file_name,
+                     cache_status_t new_status,
+                     uint64_t size = 0);
+
+  int evict_entry(std::string file_name);
+
+  void get_evict_list(std::list<std::string>* obj_list);
+
+  uint64_t get_free_size();
+  uint64_t get_promoting_entry_num();
+  uint64_t get_promoted_entry_num();
+  std::string get_evict_entry();
+
+ private:
+  cache_status_t alloc_entry(std::string file_name);
+
+  class Entry : public LRUObject {
+   public:
+    cache_status_t status;
+    Entry() : status(OBJ_CACHE_NONE) {}
+    std::string file_name;
+    uint64_t size;
+  };
+
+  CephContext* cct;
+  double m_watermark;
+  uint64_t m_max_inflight_ops;
+  uint64_t m_max_cache_size;
+  std::atomic<uint64_t> inflight_ops = 0;
+
+  std::unordered_map<std::string, Entry*> m_cache_map;
+  ceph::shared_mutex m_cache_map_lock =
+    ceph::make_shared_mutex("rbd::cache::SimplePolicy::m_cache_map_lock");
+
+  std::atomic<uint64_t> m_cache_size;
+
+  LRU m_promoted_lru;
+};
+
+}  // namespace immutable_obj_cache
+}  // namespace ceph
+#endif  // CEPH_CACHE_SIMPLE_POLICY_H
-- 
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