diff --git a/src/common/buffer.cc b/src/common/buffer.cc
index 59f0fde44dd..98ce67c7e1e 100644
--- a/src/common/buffer.cc
+++ b/src/common/buffer.cc
@@ -900,6 +900,18 @@ static simple_spinlock_t buffer_debug_lock = SIMPLE_SPINLOCK_INITIALIZER;
       buffer_c_str_accesses.inc();
     return _raw->get_data() + _off;
   }
+  const char *buffer::ptr::end_c_str() const {
+    assert(_raw);
+    if (buffer_track_c_str)
+      buffer_c_str_accesses.inc();
+    return _raw->get_data() + _off + _len;
+  }
+  char *buffer::ptr::end_c_str() {
+    assert(_raw);
+    if (buffer_track_c_str)
+      buffer_c_str_accesses.inc();
+    return _raw->get_data() + _off + _len;
+  }
 
   unsigned buffer::ptr::unused_tail_length() const
   {
diff --git a/src/include/buffer.h b/src/include/buffer.h
index e900fc7ca26..f5b2826b85b 100644
--- a/src/include/buffer.h
+++ b/src/include/buffer.h
@@ -209,6 +209,8 @@ namespace buffer CEPH_BUFFER_API {
     raw *get_raw() const { return _raw; }
     const char *c_str() const;
     char *c_str();
+    const char *end_c_str() const;
+    char *end_c_str();
     unsigned length() const { return _len; }
     unsigned offset() const { return _off; }
     unsigned start() const { return _off; }