From 5c999b152813a15dce3c1ad97a2ac9734acdab92 Mon Sep 17 00:00:00 2001
From: David Zafman <dzafman@redhat.com>
Date: Thu, 10 Dec 2015 15:36:41 -0800
Subject: [PATCH] osd: Allow get_hash_info to use attrs map if available

Signed-off-by: David Zafman <dzafman@redhat.com>
---
 src/osd/ECBackend.cc | 29 +++++++++++++++++++++--------
 src/osd/ECBackend.h  |  3 ++-
 2 files changed, 23 insertions(+), 9 deletions(-)

diff --git a/src/osd/ECBackend.cc b/src/osd/ECBackend.cc
index e8d26eb4e31d..dadfeaa0b714 100644
--- a/src/osd/ECBackend.cc
+++ b/src/osd/ECBackend.cc
@@ -1703,7 +1703,7 @@ void ECBackend::start_remaining_read_op(
 }
 
 ECUtil::HashInfoRef ECBackend::get_hash_info(
-  const hobject_t &hoid, bool checks)
+  const hobject_t &hoid, bool checks, const map<string,bufferptr> *attrs)
 {
   dout(10) << __func__ << ": Getting attr on " << hoid << dendl;
   ECUtil::HashInfoRef ref = unstable_hashinfo_registry.lookup(hoid);
@@ -1719,12 +1719,25 @@ ECUtil::HashInfoRef ECBackend::get_hash_info(
     if (r >= 0) {
       dout(10) << __func__ << ": found on disk, size " << st.st_size << dendl;
       bufferlist bl;
-      r = store->getattr(
-	coll,
-	ghobject_t(hoid, ghobject_t::NO_GEN, get_parent()->whoami_shard().shard),
-	ECUtil::get_hinfo_key(),
-	bl);
-      if (r >= 0) {
+      if (attrs) {
+	map<string, bufferptr>::const_iterator k = attrs->find(ECUtil::get_hinfo_key());
+	if (k == attrs->end()) {
+	  dout(5) << __func__ << " " << hoid << " missing hinfo attr" << dendl;
+	} else {
+	  bl.push_back(k->second);
+	}
+      } else {
+	r = store->getattr(
+	  coll,
+	  ghobject_t(hoid, ghobject_t::NO_GEN, get_parent()->whoami_shard().shard),
+	  ECUtil::get_hinfo_key(),
+	  bl);
+	if (r < 0) {
+	  dout(5) << __func__ << ": getattr failed: " << cpp_strerror(r) << dendl;
+	  bl.clear(); // just in case
+	}
+      }
+      if (bl.length() > 0) {
 	bufferlist::iterator bp = bl.begin();
 	::decode(hinfo, bp);
 	if (checks && hinfo.get_total_chunk_size() != (uint64_t)st.st_size) {
@@ -2092,7 +2105,7 @@ void ECBackend::be_deep_scrub(
     return;
   }
 
-  ECUtil::HashInfoRef hinfo = get_hash_info(poid, false);
+  ECUtil::HashInfoRef hinfo = get_hash_info(poid, false, &o.attrs);
   if (!hinfo) {
     dout(0) << "_scan_list  " << poid << " could not retrieve hash info" << dendl;
     o.read_error = true;
diff --git a/src/osd/ECBackend.h b/src/osd/ECBackend.h
index efb284e2d73f..bb064f849651 100644
--- a/src/osd/ECBackend.h
+++ b/src/osd/ECBackend.h
@@ -456,7 +456,8 @@ public:
   const ECUtil::stripe_info_t sinfo;
   /// If modified, ensure that the ref is held until the update is applied
   SharedPtrRegistry<hobject_t, ECUtil::HashInfo, hobject_t::BitwiseComparator> unstable_hashinfo_registry;
-  ECUtil::HashInfoRef get_hash_info(const hobject_t &hoid, bool checks = true);
+  ECUtil::HashInfoRef get_hash_info(const hobject_t &hoid, bool checks = true,
+				    const map<string,bufferptr> *attr = NULL);
 
   friend struct ReadCB;
   void check_op(Op *op);
-- 
2.47.3