From: Sage Weil <sage@redhat.com>
Date: Thu, 1 Jun 2017 20:47:27 +0000 (-0400)
Subject: os/ObjectStore: is_rotational() interface
X-Git-Tag: v12.1.0~249^2~5
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=66fe04bffc0208588daf72662bdb795079ec676a;p=ceph.git

os/ObjectStore: is_rotational() interface

Signed-off-by: Sage Weil <sage@redhat.com>
---

diff --git a/src/os/ObjectStore.h b/src/os/ObjectStore.h
index 9c760a91c4457..71f5e80b17c5f 100644
--- a/src/os/ObjectStore.h
+++ b/src/os/ObjectStore.h
@@ -1561,6 +1561,20 @@ public:
   virtual bool wants_journal() = 0;  //< prefers a journal
   virtual bool allows_journal() = 0; //< allows a journal
 
+  /**
+   * is_rotational
+   *
+   * Check whether store is backed by a rotational (HDD) or non-rotational
+   * (SSD) device.
+   *
+   * This must be usable *before* the store is mounted.
+   *
+   * @return true for HDD, false for SSD
+   */
+  virtual bool is_rotational() {
+    return true;
+  }
+
   virtual bool can_sort_nibblewise() {
     return false;   // assume a backend cannot, unless it says otherwise
   }