From: Zhang Song <zhangsong02@qianxin.com>
Date: Mon, 18 Aug 2025 11:12:53 +0000 (+0800)
Subject: crimson/os/seastore: add retire alloc remarks for backref extents to skip replay... 
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=1a06854eefe5e2270d175ef9c4f7fa7251430e5f;p=ceph.git

crimson/os/seastore: add retire alloc remarks for backref extents to skip replay invalid deltas

Fixes: https://tracker.ceph.com/issues/72580

Signed-off-by: Zhang Song <zhangsong02@qianxin.com>
---

diff --git a/src/crimson/os/seastore/cache.cc b/src/crimson/os/seastore/cache.cc
index d3581498968e..255dd9406be7 100644
--- a/src/crimson/os/seastore/cache.cc
+++ b/src/crimson/os/seastore/cache.cc
@@ -1436,6 +1436,14 @@ record_t Cache::prepare_record(
 	  extent->get_length(),
 	  extent->get_type()));
     } else if (is_backref_node(extent->get_type())) {
+      // The retire alloc deltas are used to identify the invalid backref extent
+      // deltas during replay when using CircularBoundedJournal, see
+      // build_paddr_seq_map in CBJournal::replay().
+      rel_delta.alloc_blk_ranges.emplace_back(
+	alloc_blk_t::create_retire(
+	  extent->get_paddr(),
+	  extent->get_length(),
+	  extent->get_type()));
       remove_backref_extent(extent->get_paddr());
     } else {
       ERRORT("Got unexpected extent type: {}", t, *extent);
diff --git a/src/crimson/os/seastore/seastore_types.h b/src/crimson/os/seastore/seastore_types.h
index 45eab27c9f8b..976b6a59c39c 100644
--- a/src/crimson/os/seastore/seastore_types.h
+++ b/src/crimson/os/seastore/seastore_types.h
@@ -2107,6 +2107,7 @@ struct alloc_blk_t {
       extent_len_t len,
       extent_types_t type) {
     assert(is_backref_mapped_type(type) ||
+	   is_backref_node(type) ||
 	   is_retired_placeholder_type(type));
     return alloc_blk_t(paddr, L_ADDR_NULL, len, type);
   }