From: xie xingguo <xie.xingguo@zte.com.cn>
Date: Thu, 18 Aug 2016 10:12:23 +0000 (+0800)
Subject: os/bluestore: fix decoding hash of bnode
X-Git-Tag: v11.0.1~426^2
X-Git-Url: http://git.apps.os.sepia.ceph.com/?a=commitdiff_plain;h=434b18a61e5f13c8982ea9898ef4782bf4bd246e;p=ceph-ci.git

os/bluestore: fix decoding hash of bnode

We encode reversed bits of hash and then write it onto disk,
therefore we shall decode and then reserse to get it back.

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 dc7e822b4d5..2f1d9afe2b8 100644
--- a/src/os/bluestore/BlueStore.cc
+++ b/src/os/bluestore/BlueStore.cc
@@ -276,7 +276,9 @@ static int get_key_bnode(const string& key, shard_id_t *shard,
   p = _key_decode_shard(p, shard);
   p = _key_decode_u64(p, (uint64_t*)pool);
   *pool -= 0x8000000000000000ull;
-  p = _key_decode_u32(p, hash);
+  uint32_t hash_reverse_bits;
+  p = _key_decode_u32(p, &hash_reverse_bits);
+  *hash = hobject_t::_reverse_bits(hash_reverse_bits);
   return 0;
 }