ceph/src/tools/rbd/action/Status.cc

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3
   4 #include "tools/rbd/ArgumentTypes.h"
   5 #include "tools/rbd/Shell.h"
   6 #include "tools/rbd/Utils.h"
   7 #include "include/rbd_types.h"
   8 #include "common/errno.h"
   9 #include "common/Formatter.h"
  10 #include <iostream>
  11 #include <boost/program_options.hpp>
  12
  13 namespace rbd {
  14 namespace action {
  15 namespace status {
  16
  17 namespace at = argument_types;
  18 namespace po = boost::program_options;
  19
  20 static int do_show_status(librados::IoCtx &io_ctx, librbd::Image &image,
  21                           const char *imgname, Formatter *f)
  22 {
  23   uint8_t old_format;
  24   int r;
  25   std::string header_oid;
  26   std::list<obj_watch_t> watchers;
  27
  28   r = image.old_format(&old_format);
  29   if (r < 0)
  30     return r;
  31
  32   if (old_format) {
  33     header_oid = imgname;
  34     header_oid += RBD_SUFFIX;
  35   } else {
  36     std::string id;
  37     r = image.get_id(&id);
  38     if (r < 0) {
  39       return r;
  40     }
  41
  42     header_oid = RBD_HEADER_PREFIX + id;
  43   }
  44
  45   r = io_ctx.list_watchers(header_oid, &watchers);
  46   if (r < 0)
  47     return r;
  48
  49   if (f)
  50     f->open_object_section("status");
  51
  52   if (f) {
  53     f->open_array_section("watchers");
  54     for (std::list<obj_watch_t>::iterator i = watchers.begin(); i != watchers.end(); ++i) {
  55       f->open_object_section("watcher");
  56       f->dump_string("address", i->addr);
  57       f->dump_unsigned("client", i->watcher_id);
  58       f->dump_unsigned("cookie", i->cookie);
  59       f->close_section();
  60     }
  61     f->close_section();
  62   } else {
  63     if (watchers.size()) {
  64       std::cout << "Watchers:" << std::endl;
  65       for (std::list<obj_watch_t>::iterator i = watchers.begin();
  66            i != watchers.end(); ++i) {
  67         std::cout << "\twatcher=" << i->addr << " client." << i->watcher_id
  68                   << " cookie=" << i->cookie << std::endl;
  69       }
  70     } else {
  71       std::cout << "Watchers: none" << std::endl;
  72     }
  73   }
  74   if (f) {
  75     f->close_section();
  76     f->flush(std::cout);
  77   }
  78
  79   return 0;
  80 }
  81
  82 void get_arguments(po::options_description *positional,
  83                    po::options_description *options) {
  84   at::add_image_spec_options(positional, options, at::ARGUMENT_MODIFIER_NONE);
  85   at::add_format_options(options);
  86 }
  87
  88 int execute(const po::variables_map &vm) {
  89   size_t arg_index = 0;
  90   std::string pool_name;
  91   std::string image_name;
  92   std::string snap_name;
  93   int r = utils::get_pool_image_snapshot_names(
  94     vm, at::ARGUMENT_MODIFIER_NONE, &arg_index, &pool_name, &image_name,
  95     &snap_name, utils::SNAPSHOT_PRESENCE_NONE, utils::SPEC_VALIDATION_NONE);
  96   if (r < 0) {
  97     return r;
  98   }
  99
 100   at::Format::Formatter formatter;
 101   r = utils::get_formatter(vm, &formatter);
 102   if (r < 0) {
 103     return r;
 104   }
 105
 106   librados::Rados rados;
 107   librados::IoCtx io_ctx;
 108   librbd::Image image;
 109   r = utils::init_and_open_image(pool_name, image_name, "", "", true, &rados,
 110                                  &io_ctx, &image);
 111   if (r < 0) {
 112     return r;
 113   }
 114
 115   r = do_show_status(io_ctx, image, image_name.c_str(), formatter.get());
 116   if (r < 0) {
 117     std::cerr << "rbd: show status failed: " << cpp_strerror(r) << std::endl;
 118     return r;
 119   }
 120   return 0;
 121 }
 122
 123 Shell::Action action(
 124   {"status"}, {}, "Show the status of this image.", "", &get_arguments,
 125   &execute);
 126
 127 } // namespace status
 128 } // namespace action
 129 } // namespace rbd