Minor fix to segment cleaning.

[cumulus.git] / metadata.cc

diff --git a/metadata.cc b/metadata.cc
index a3323a1..cb3dabb 100644 (file)
--- a/metadata.cc
+++ b/metadata.cc
@@ -24,6 +24,10 @@ using std::ostringstream;
 
 static const size_t LBS_METADATA_BLOCK_SIZE = 65536;
 
+// If true, forces a full write of metadata: will not include pointers to
+// metadata in old snapshots.
+bool flag_full_metadata = false;
+
 /* TODO: Move to header file */
 void add_segment(const string& segment);
 
@@ -198,12 +202,13 @@ bool MetadataWriter::find(const string& path)
 }
 
 /* Does a file appear to be unchanged from the previous time it was backed up,
- * based on stat information?
- *
- * TODO: Notice files that were modified as they were being backed up the last
- * time. */
+ * based on stat information? */
 bool MetadataWriter::is_unchanged(const struct stat *stat_buf)
 {
+    if (old_metadata.find("volatile") != old_metadata.end()
+        && parse_int(old_metadata["volatile"]) != 0)
+        return false;
+
     if (old_metadata.find("ctime") == old_metadata.end())
         return false;
     if (stat_buf->st_ctime != parse_int(old_metadata["ctime"]))
@@ -268,6 +273,11 @@ void MetadataWriter::metadata_flush()
     ObjectReference indirect;
     for (list<MetadataItem>::iterator i = items.begin();
          i != items.end(); ++i) {
+        // If indirectly referencing any other metadata logs, be sure those
+        // segments are properly referenced.
+        if (i->reused)
+            add_segment(i->ref.get_segment());
+
         // Write out an indirect reference to any previous objects which could
         // be reused
         if (!i->reused || !indirect.merge(i->ref)) {
@@ -342,7 +352,7 @@ void MetadataWriter::add(dictionary info)
     item.reused = false;
     item.text += encode_dict(info) + "\n";
 
-    if (info == old_metadata) {
+    if (info == old_metadata && !flag_full_metadata) {
         ObjectReference ref = ObjectReference::parse(old_metadata_loc);
         if (!ref.is_null()) {
             item.reused = true;