rbd: warn on 0-length secret

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

diff --git a/src/rbd.cc b/src/rbd.cc
index 79c513e289ec79489df8757c9f5e3aca52d226da..4419fbd5b8eb38c3c26ce15162a8e6c6d803902a 100644 (file)
--- a/src/rbd.cc
+++ b/src/rbd.cc
@@ -713,6 +713,8 @@ static int do_kernel_add(const char *poolname, const char *imgname, const char *
 
     r = set_kernel_secret(secret_str.c_str(), key_name);
     if (r >= 0) {
+      if (r == 0)
+       cerr << "warning: secret has length 0" << std::endl;
       oss << ",key=" << key_name;
     } else if (r == -ENODEV || r == -ENOSYS) {
       /* running against older kernel; fall back to secret= in options */