mds: check inode's direct parent in inode_backtrace_t::compare

inode's direct parents must be equivalent for non-divergent
backtraces

Signed-off-by: Yan, Zheng <zyan@redhat.com>

diff --git a/src/mds/inode_backtrace.cc b/src/mds/inode_backtrace.cc
index bde2145ebf247df7e4718fed0c07082b153e16e2..37c052982e9a0be6b103274443703b8f09d274c8 100644 (file)
--- a/src/mds/inode_backtrace.cc
+++ b/src/mds/inode_backtrace.cc
@@ -130,6 +130,8 @@ int inode_backtrace_t::compare(const inode_backtrace_t& other,
     comparator = 1;
   else if (ancestors[0].version < other.ancestors[0].version)
     comparator = -1;
+  if (ancestors[0].dirino != other.ancestors[0].dirino)
+    *divergent = true;
   for (int i = 1; i < min_size; ++i) {
     if (*divergent) {
       /**