From: Sage Weil <sage@newdream.net>
Date: Mon, 8 Feb 2021 18:53:51 +0000 (-0600)
Subject: mgr/DaemonState: store optional wear_level for devices
X-Git-Tag: v16.2.0~152^2~3
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=26b884fd71ddff33fbab05e0998bb67d79113f92;p=ceph.git

mgr/DaemonState: store optional wear_level for devices

Signed-off-by: Sage Weil <sage@newdream.net>
(cherry picked from commit c52fcb51afb6da2dccd6954a40f0f1c616324855)
---

diff --git a/src/mgr/DaemonState.cc b/src/mgr/DaemonState.cc
index b9e1b04ea6c9..32cbbe3b9c0b 100644
--- a/src/mgr/DaemonState.cc
+++ b/src/mgr/DaemonState.cc
@@ -39,6 +39,10 @@ void DeviceState::set_metadata(map<string,string>&& m)
   if (p != metadata.end()) {
     life_expectancy_stamp.parse(p->second);
   }
+  p = metadata.find("wear_level");
+  if (p != metadata.end()) {
+    wear_level = atof(p->second.c_str());
+  }
 }
 
 void DeviceState::set_life_expectancy(utime_t from, utime_t to, utime_t now)
@@ -71,6 +75,16 @@ void DeviceState::rm_life_expectancy()
   metadata.erase("life_expectancy_stamp");
 }
 
+void DeviceState::set_wear_level(float wear)
+{
+  wear_level = wear;
+  if (wear >= 0) {
+    metadata["wear_level"] = stringify(wear);
+  } else {
+    metadata.erase("wear_level");
+  }
+}
+
 string DeviceState::get_life_expectancy_str(utime_t now) const
 {
   if (life_expectancy.first == utime_t()) {
@@ -115,6 +129,9 @@ void DeviceState::dump(Formatter *f) const
     f->dump_stream("life_expectancy_stamp")
       << life_expectancy_stamp;
   }
+  if (wear_level >= 0) {
+    f->dump_float("wear_level", wear_level);
+  }
 }
 
 void DeviceState::print(ostream& out) const
@@ -133,6 +150,9 @@ void DeviceState::print(ostream& out) const
 	<< life_expectancy.second
 	<< " (as of " << life_expectancy_stamp << ")\n";
   }
+  if (wear_level >= 0) {
+    out << "wear_level " << wear_level << "\n";
+  }
 }
 
 void DaemonStateIndex::insert(DaemonStatePtr dm)
diff --git a/src/mgr/DaemonState.h b/src/mgr/DaemonState.h
index 1c3b785f25bc..8c21305a9c23 100644
--- a/src/mgr/DaemonState.h
+++ b/src/mgr/DaemonState.h
@@ -220,12 +220,15 @@ struct DeviceState : public RefCountedObject
 
   pair<utime_t,utime_t> life_expectancy;  ///< when device failure is expected
   utime_t life_expectancy_stamp;          ///< when life expectency was recorded
+  float wear_level = -1;                  ///< SSD wear level (negative if unknown)
 
   void set_metadata(map<string,string>&& m);
 
   void set_life_expectancy(utime_t from, utime_t to, utime_t now);
   void rm_life_expectancy();
 
+  void set_wear_level(float wear);
+
   string get_life_expectancy_str(utime_t now) const;
 
   /// true of we can be safely forgotten/removed from memory