os/bluestore: fix locking for _dump_blob_map

Signed-off-by: Sage Weil <sage@redhat.com>

diff --git a/src/os/bluestore/BlueStore.cc b/src/os/bluestore/BlueStore.cc
index 506db30ca35344f520b70a57e25f9aa14976f227..5ef8ef9be02e80c907838332b89437565d631daf 100644 (file)
--- a/src/os/bluestore/BlueStore.cc
+++ b/src/os/bluestore/BlueStore.cc
@@ -5250,6 +5250,7 @@ void BlueStore::_dump_blob_map(BlobMap &bm, int log_level)
       dout(log_level) << __func__ << "       csum: " << std::hex << v << std::dec
                      << dendl;
     }
+    std::lock_guard<std::mutex> l(b.bc.cache->lock);
     if (!b.bc.empty()) {
       for (auto& i : b.bc.buffer_map) {
        dout(log_level) << __func__ << "       0x" << std::hex << i.first