From e6918187568dbd01842d8d1d2c808ce16a894239 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 21 Apr 2024 13:54:28 +0200
Subject: Adding upstream version 18.2.2.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/osd/PGStateUtils.h | 85 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 src/osd/PGStateUtils.h

(limited to 'src/osd/PGStateUtils.h')

diff --git a/src/osd/PGStateUtils.h b/src/osd/PGStateUtils.h
new file mode 100644
index 000000000..952464641
--- /dev/null
+++ b/src/osd/PGStateUtils.h
@@ -0,0 +1,85 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#pragma once
+
+#include "include/utime.h"
+#include "common/Formatter.h"
+
+#include <stack>
+#include <vector>
+#include <boost/circular_buffer.hpp>
+
+class PGStateHistory;
+
+struct EpochSource {
+  virtual epoch_t get_osdmap_epoch() const = 0;
+  virtual ~EpochSource() {}
+};
+
+struct NamedState {
+  PGStateHistory *pgsh;
+  const char *state_name;
+  utime_t enter_time;
+  const char *get_state_name() { return state_name; }
+  NamedState(
+    PGStateHistory *pgsh,
+    const char *state_name_);
+  virtual ~NamedState();
+};
+
+using state_history_entry = std::tuple<utime_t, utime_t, const char*>;
+using embedded_state = std::pair<utime_t, const char*>;
+
+struct PGStateInstance {
+  // Time spent in pg states
+
+  void setepoch(const epoch_t current_epoch) {
+    this_epoch = current_epoch;
+  }
+
+  void enter_state(const utime_t entime, const char* state) {
+    embedded_states.push(std::make_pair(entime, state));
+  }
+
+  void exit_state(const utime_t extime) {
+    embedded_state this_state = embedded_states.top();
+    state_history.push_back(state_history_entry{
+        this_state.first, extime, this_state.second});
+    embedded_states.pop();
+  }
+
+  bool empty() const {
+    return embedded_states.empty();
+  }
+
+  epoch_t this_epoch;
+  std::vector<state_history_entry> state_history;
+  std::stack<embedded_state> embedded_states;
+};
+
+class PGStateHistory {
+public:
+  PGStateHistory(const EpochSource &es) : buffer(10), es(es) {}
+
+  void enter(const utime_t entime, const char* state);
+
+  void exit(const char* state);
+
+  void reset() {
+    buffer.push_back(std::move(pi));
+    pi = nullptr;
+  }
+
+  void dump(ceph::Formatter* f) const;
+
+  const char *get_current_state() const {
+    if (pi == nullptr) return "unknown";
+    return std::get<1>(pi->embedded_states.top());
+  }
+
+private:
+  std::unique_ptr<PGStateInstance> pi;
+  boost::circular_buffer<std::unique_ptr<PGStateInstance>> buffer;
+  const EpochSource &es;
+};
-- 
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