rbd-nbd: show per device cookie with list command

[root@linux-vm1]# rbd-nbd list-mapped
id    pool      namespace  image   snap  device     cookie
8133  rbd-pool             image0  -     /dev/nbd0  c704cb91-c6cf-466e-a335-0e935c0d5e47

Signed-off-by: Prasanna Kumar Kalever <prasanna.kalever@redhat.com>

diff --git a/src/tools/rbd_nbd/rbd-nbd.cc b/src/tools/rbd_nbd/rbd-nbd.cc
index 0ac0e23e3a82e89c42d7b6f291068697dace510c..f8c24397542c2ae6cc3b1a69d61a2e870b0973f4 100644 (file)
--- a/src/tools/rbd_nbd/rbd-nbd.cc
+++ b/src/tools/rbd_nbd/rbd-nbd.cc
@@ -803,6 +803,7 @@ public:
         continue;
       }
       ifs >> pid;
+      ifs.close();
 
       // If the rbd-nbd is re-attached the pid may store garbage
       // here. We are sure this is the case when it is negative or
@@ -907,6 +908,7 @@ private:
       c.devpath = cfg->devpath;
     }
 
+    c.cookie = get_cookie(cfg->devpath);
     *cfg = c;
     return 0;
   }
@@ -1935,6 +1937,7 @@ static int do_list_mapped_devices(const std::string &format, bool pretty_format)
     tbl.define_column("image", TextTable::LEFT, TextTable::LEFT);
     tbl.define_column("snap", TextTable::LEFT, TextTable::LEFT);
     tbl.define_column("device", TextTable::LEFT, TextTable::LEFT);
+    tbl.define_column("cookie", TextTable::LEFT, TextTable::LEFT);
   }
 
   Config cfg;
@@ -1948,6 +1951,7 @@ static int do_list_mapped_devices(const std::string &format, bool pretty_format)
       f->dump_string("image", cfg.imgname);
       f->dump_string("snap", cfg.snapname);
       f->dump_string("device", cfg.devpath);
+      f->dump_string("cookie", cfg.cookie);
       f->close_section();
     } else {
       should_print = true;
@@ -1955,7 +1959,7 @@ static int do_list_mapped_devices(const std::string &format, bool pretty_format)
         cfg.snapname = "-";
       }
       tbl << cfg.pid << cfg.poolname << cfg.nsname << cfg.imgname
-          << cfg.snapname << cfg.devpath << TextTable::endrow;
+          << cfg.snapname << cfg.devpath << cfg.cookie << TextTable::endrow;
     }
   }