Fix lifecycle transition of encrypted multipart objects.

Lifecycle transtion can copy objects to a different storage tier.
When this happens, since the object is repacked, the original
manifest is invalidated.  It is necessary to store a special
"parts_len" attribute to fix this.  There was code in PutObj
to handle this, but that was only used for multisite replication,
it is not used by the lifecycle transisiton code.  This fix
adds similar logic to the lifecycle transition code path to make the
same thing happen.

Fixes: https://tracker.ceph.com/issues/23264
Signed-off-by: Marcus Watts <mwatts@redhat.com>

diff --git a/src/rgw/driver/rados/rgw_rados.cc b/src/rgw/driver/rados/rgw_rados.cc
index 565ebf2cfb47e9ee84162b40f2ab5d45be3f04f3..76f61cb192bd0e258bc19da6580eda4d32688a7a 100644 (file)
--- a/src/rgw/driver/rados/rgw_rados.cc
+++ b/src/rgw/driver/rados/rgw_rados.cc
@@ -5422,6 +5422,35 @@ int RGWRados::copy_obj_data(RGWObjectCtx& obj_ctx,
                             log_op ? rgw::sal::FLAG_LOG_OP : 0);
 }
 
+int fixup_manifest_to_parts_len(const DoutPrefixProvider *dpp, std::map<std::string, ceph::buffer::list> &src_attrs) {
+  auto iter = src_attrs.find(RGW_ATTR_MANIFEST);
+  if (iter == src_attrs.end()) {
+    return 0;
+  }
+  bufferlist &manifest_bl { iter->second };
+//        manifest_bl = std::copy(iter->second);
+//        src_attrs.erase(iter);
+
+  // if the source object was encrypted, preserve the part lengths from
+  // the original object's manifest in RGW_ATTR_CRYPT_PARTS. if the object
+  // already replicated and has the RGW_ATTR_CRYPT_PARTS attr, preserve it
+  if (src_attrs.count(RGW_ATTR_CRYPT_MODE) &&
+      !src_attrs.count(RGW_ATTR_CRYPT_PARTS)) {
+    std::vector<size_t> parts_len;
+    int r = RGWGetObj_BlockDecrypt::read_manifest_parts(dpp, manifest_bl,
+                                                       parts_len);
+    if (r < 0) {
+      ldpp_dout(dpp, 4) << "failed to read part lengths from the manifest" << dendl;
+      return r;
+    }
+    // store the encoded part lenghts in RGW_ATTR_CRYPT_PARTS
+    bufferlist parts_bl;
+    encode(parts_len, parts_bl);
+    src_attrs[RGW_ATTR_CRYPT_PARTS] = std::move(parts_bl);
+  }
+  return 0;
+}
+
 int RGWRados::transition_obj(RGWObjectCtx& obj_ctx,
                              RGWBucketInfo& bucket_info,
                              rgw_obj obj,
@@ -5448,6 +5477,10 @@ int RGWRados::transition_obj(RGWObjectCtx& obj_ctx,
   if (ret < 0) {
     return ret;
   }
+  ret = fixup_manifest_to_parts_len(dpp, attrs);
+  if (ret < 0) {
+    return ret;
+  }
 
   if (read_mtime != mtime) {
     /* raced */