From: Xuehan Xu <xuxuehan@qianxin.com>
Date: Sat, 11 Oct 2025 02:39:26 +0000 (+0800)
Subject: crimson/os/seastore/lba_manager: make sure alloc_extents return viewable
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=cafa0b5daaa6e451f28a70142112ff2757beb0a8;p=ceph-ci.git

crimson/os/seastore/lba_manager: make sure alloc_extents return viewable
mappings

Signed-off-by: Xuehan Xu <xuxuehan@qianxin.com>
---

diff --git a/src/crimson/os/seastore/lba/btree_lba_manager.cc b/src/crimson/os/seastore/lba/btree_lba_manager.cc
index 552f1b0cf8e..a2c5a914e4a 100644
--- a/src/crimson/os/seastore/lba/btree_lba_manager.cc
+++ b/src/crimson/os/seastore/lba/btree_lba_manager.cc
@@ -673,12 +673,12 @@ BtreeLBAManager::insert_mappings(
     return trans_intr::do_for_each(
       alloc_infos.begin(),
       alloc_infos.end(),
-      [c, &btree, &iter, &ret](auto &info)
+      [c, &btree, &iter](auto &info)
     {
       assert(info.key != L_ADDR_NULL);
       return btree.insert(
 	c, iter, info.key, info.value
-      ).si_then([c, &iter, &ret, &info](auto p) {
+      ).si_then([c, &iter, &info](auto p) {
 	ceph_assert(p.second);
 	iter = std::move(p.first);
 	auto &leaf_node = *iter.get_leaf_node();
@@ -705,11 +705,20 @@ BtreeLBAManager::insert_mappings(
 	    info.extent->set_laddr(iter.get_key());
 	  }
 	}
-	ret.push_back(iter.get_cursor(c));
 	return iter.next(c).si_then([&iter](auto p) {
 	  iter = std::move(p);
 	});
       });
+    }).si_then([&ret, &iter, alloc_infos, c] {
+      return trans_intr::do_for_each(
+	boost::make_counting_iterator<size_t>(0),
+	boost::make_counting_iterator<size_t>(alloc_infos.size()),
+	[&ret, &iter, c](auto) {
+	return iter.prev(c).si_then([c, &ret, &iter](auto it) {
+	  ret.push_front(it.get_cursor(c));
+	  iter = std::move(it);
+	});
+      });
     }).si_then([&ret] {
       return alloc_mappings_iertr::make_ready_future<
 	std::list<LBACursorRef>>(std::move(ret));