From: xie xingguo <xie.xingguo@zte.com.cn>
Date: Sat, 10 Sep 2016 01:25:05 +0000 (+0800)
Subject: os/bluestore: simplify extent_shard_key a little
X-Git-Tag: v11.0.1~261^2~2
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=836715afcfe07d9a57f65b46fc8f94cf98c6e23d;p=ceph.git

os/bluestore: simplify extent_shard_key a little

Signed-off-by: xie xingguo <xie.xingguo@zte.com.cn>
---

diff --git a/src/os/bluestore/BlueStore.cc b/src/os/bluestore/BlueStore.cc
index d868af96c38d..d98dba72d01d 100644
--- a/src/os/bluestore/BlueStore.cc
+++ b/src/os/bluestore/BlueStore.cc
@@ -392,7 +392,7 @@ static void rewrite_extent_shard_key(uint32_t offset, string *key)
 int get_key_extent_shard(const string& key, string *onode_key, uint32_t *offset)
 {
   assert(key.size() > sizeof(uint32_t) + 1);
-  assert(key[key.size() - 1] == EXTENT_SHARD_KEY_SUFFIX);
+  assert(*key.rbegin() == EXTENT_SHARD_KEY_SUFFIX);
   int okey_len = key.size() - sizeof(uint32_t) - 1;
   *onode_key = key.substr(0, okey_len);
   const char *p = key.data() + okey_len;
@@ -402,7 +402,7 @@ int get_key_extent_shard(const string& key, string *onode_key, uint32_t *offset)
 
 static bool is_extent_shard_key(const string& key)
 {
-  return key[key.size()-1] == EXTENT_SHARD_KEY_SUFFIX;
+  return *key.rbegin() == EXTENT_SHARD_KEY_SUFFIX;
 }
 
 // '-' < '.' < '~'