From 3f72b7ce19a46383727bc76d3216467410e08aff Mon Sep 17 00:00:00 2001
From: Jason Volk <jason@zemos.net>
Date: Fri, 13 Apr 2018 22:08:57 -0700
Subject: [PATCH] ircd::db: Update gopts; add seqnum option; fix missing
 readahead.

---
 include/ircd/db/opts.h | 6 ++++--
 ircd/db.cc             | 7 +++++--
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/include/ircd/db/opts.h b/include/ircd/db/opts.h
index 743319bce..2671ee5f0 100644
--- a/include/ircd/db/opts.h
+++ b/include/ircd/db/opts.h
@@ -73,8 +73,10 @@ struct ircd::db::gopts
 :opts<get>
 {
 	database::snapshot snapshot;
-	size_t readahead { 4_KiB };
-	const rocksdb::Slice *upper_bound {nullptr};
+	const rocksdb::Slice *lower_bound { nullptr };
+	const rocksdb::Slice *upper_bound { nullptr };
+	size_t readahead { 0 };
+	uint64_t seqnum { 0 };
 
 	using opts<get>::opts;
 };
diff --git a/ircd/db.cc b/ircd/db.cc
index abe1fbbd8..07a4a8fce 100644
--- a/ircd/db.cc
+++ b/ircd/db.cc
@@ -4927,11 +4927,11 @@ ircd::db::make_opts(const gopts &opts)
 	rocksdb::ReadOptions ret;
 	assert(ret.fill_cache);
 	ret.read_tier = NON_BLOCKING;
-	ret.iterate_upper_bound = opts.upper_bound;
 
 	// slice* for exclusive upper bound. when prefixes are used this value must
 	// have the same prefix because ordering is not guaranteed between prefixes
-	//ret.iterate_upper_bound = nullptr;
+	ret.iterate_lower_bound = opts.lower_bound;
+	ret.iterate_upper_bound = opts.upper_bound;
 
 	ret += opts;
 	return ret;
@@ -4941,6 +4941,9 @@ rocksdb::ReadOptions &
 ircd::db::operator+=(rocksdb::ReadOptions &ret,
                      const gopts &opts)
 {
+	ret.iter_start_seqnum = opts.seqnum;
+	ret.readahead_size = opts.readahead;
+
 	if(opts.snapshot && !test(opts, get::NO_SNAPSHOT))
 		ret.snapshot = opts.snapshot;