From 2a940fe5a68e81d705190283443a0a03c65384e8 Mon Sep 17 00:00:00 2001
From: Igor Fedotov <ifedotov@suse.com>
Date: Wed, 13 Mar 2019 18:51:46 +0300
Subject: [PATCH] os/bluestore: make bluestore interval base template.

We might need intervals at BlueStore with both 32-bit and 64-bit
lengths. Having base template eliminates the need for copy/paste

Signed-off-by: Igor Fedotov <ifedotov@suse.com>
(cherry picked from commit f775d4227fb9432840c795115669766565c5e718)
---
 src/os/bluestore/bluestore_types.h | 27 ++++++++++++++++++---------
 1 file changed, 18 insertions(+), 9 deletions(-)

diff --git a/src/os/bluestore/bluestore_types.h b/src/os/bluestore/bluestore_types.h
index e83d32622fc99..87fbd981d9f80 100644
--- a/src/os/bluestore/bluestore_types.h
+++ b/src/os/bluestore/bluestore_types.h
@@ -66,17 +66,16 @@ WRITE_CLASS_DENC(bluestore_cnode_t)
 
 ostream& operator<<(ostream& out, const bluestore_cnode_t& l);
 
-/// pextent: physical extent
-struct bluestore_pextent_t {
+template <typename OFFS_TYPE, typename LEN_TYPE>
+struct bluestore_interval_t
+{
   static const uint64_t INVALID_OFFSET = ~0ull;
 
-  uint64_t offset = 0;
-  uint32_t length = 0;
+  OFFS_TYPE offset = 0;
+  LEN_TYPE length = 0;
 
-  bluestore_pextent_t() {}
-  bluestore_pextent_t(uint64_t o, uint64_t l) : offset(o), length(l) {}
-  bluestore_pextent_t(const bluestore_pextent_t &ext) :
-    offset(ext.offset), length(ext.length) {}
+  bluestore_interval_t(){}
+  bluestore_interval_t(uint64_t o, uint64_t l) : offset(o), length(l) {}
 
   bool is_valid() const {
     return offset != INVALID_OFFSET;
@@ -85,10 +84,20 @@ struct bluestore_pextent_t {
     return offset != INVALID_OFFSET ? offset + length : INVALID_OFFSET;
   }
 
-  bool operator==(const bluestore_pextent_t& other) const {
+  bool operator==(const bluestore_interval_t& other) const {
     return offset == other.offset && length == other.length;
   }
 
+};
+
+/// pextent: physical extent
+struct bluestore_pextent_t : public bluestore_interval_t<uint64_t, uint32_t> 
+{
+  bluestore_pextent_t() {}
+  bluestore_pextent_t(uint64_t o, uint64_t l) : bluestore_interval_t(o, l) {}
+  bluestore_pextent_t(const bluestore_interval_t &ext) :
+    bluestore_interval_t(ext.offset, ext.length) {}
+
   DENC(bluestore_pextent_t, v, p) {
     denc_lba(v.offset, p);
     denc_varint_lowz(v.length, p);
-- 
2.39.5