ceph/src/mon/MonCommand.h

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3 /*
   4  * Ceph - scalable distributed file system
   5  *
   6  * Copyright (C) 2017 John Spray <john.spray@redhat.com>
   7  *
   8  * This is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License version 2.1, as published by the Free Software
  11  * Foundation.  See file COPYING.
  12  */
  13
  14 #pragma once
  15
  16 #include <string>
  17 #include "include/encoding.h"
  18
  19 struct MonCommand {
  20   std::string cmdstring;
  21   std::string helpstring;
  22   std::string module;
  23   std::string req_perms;
  24   std::string availability;
  25   uint64_t flags;
  26
  27   // MonCommand flags
  28   static const uint64_t FLAG_NONE       = 0;
  29   static const uint64_t FLAG_NOFORWARD  = 1 << 0;
  30   static const uint64_t FLAG_OBSOLETE   = 1 << 1;
  31   static const uint64_t FLAG_DEPRECATED = 1 << 2;
  32   static const uint64_t FLAG_MGR        = 1 << 3;
  33
  34   bool has_flag(uint64_t flag) const { return (flags & flag) != 0; }
  35   void set_flag(uint64_t flag) { flags |= flag; }
  36   void unset_flag(uint64_t flag) { flags &= ~flag; }
  37
  38   void encode(bufferlist &bl) const {
  39     ENCODE_START(1, 1, bl);
  40     encode_bare(bl);
  41     ::encode(flags, bl);
  42     ENCODE_FINISH(bl);
  43   }
  44
  45   void decode(bufferlist::iterator &bl) {
  46     DECODE_START(1, bl);
  47     decode_bare(bl);
  48     ::decode(flags, bl);
  49     DECODE_FINISH(bl);
  50   }
  51
  52   /**
  53    * Unversioned encoding for use within encode_array.
  54    */
  55   void encode_bare(bufferlist &bl) const {
  56     ::encode(cmdstring, bl);
  57     ::encode(helpstring, bl);
  58     ::encode(module, bl);
  59     ::encode(req_perms, bl);
  60     ::encode(availability, bl);
  61   }
  62   void decode_bare(bufferlist::iterator &bl) {
  63     ::decode(cmdstring, bl);
  64     ::decode(helpstring, bl);
  65     ::decode(module, bl);
  66     ::decode(req_perms, bl);
  67     ::decode(availability, bl);
  68   }
  69   bool is_compat(const MonCommand* o) const {
  70     return cmdstring == o->cmdstring &&
  71         module == o->module && req_perms == o->req_perms &&
  72         availability == o->availability;
  73   }
  74
  75   bool is_noforward() const {
  76     return has_flag(MonCommand::FLAG_NOFORWARD);
  77   }
  78
  79   bool is_obsolete() const {
  80     return has_flag(MonCommand::FLAG_OBSOLETE);
  81   }
  82
  83   bool is_deprecated() const {
  84     return has_flag(MonCommand::FLAG_DEPRECATED);
  85   }
  86
  87   bool is_mgr() const {
  88     return has_flag(MonCommand::FLAG_MGR);
  89   }
  90
  91   static void encode_array(const MonCommand *cmds, int size, bufferlist &bl) {
  92     ENCODE_START(2, 1, bl);
  93     uint16_t s = size;
  94     ::encode(s, bl);
  95     for (int i = 0; i < size; ++i) {
  96       cmds[i].encode_bare(bl);
  97     }
  98     for (int i = 0; i < size; i++) {
  99       ::encode(cmds[i].flags, bl);
 100     }
 101     ENCODE_FINISH(bl);
 102   }
 103   static void decode_array(MonCommand **cmds, int *size,
 104                            bufferlist::iterator &bl) {
 105     DECODE_START(2, bl);
 106     uint16_t s = 0;
 107     ::decode(s, bl);
 108     *size = s;
 109     *cmds = new MonCommand[*size];
 110     for (int i = 0; i < *size; ++i) {
 111       (*cmds)[i].decode_bare(bl);
 112     }
 113     if (struct_v >= 2) {
 114       for (int i = 0; i < *size; i++)
 115         ::decode((*cmds)[i].flags, bl);
 116     } else {
 117       for (int i = 0; i < *size; i++)
 118         (*cmds)[i].flags = 0;
 119     }
 120     DECODE_FINISH(bl);
 121   }
 122
 123   bool requires_perm(char p) const {
 124     return (req_perms.find(p) != std::string::npos);
 125   }
 126 };
 127 WRITE_CLASS_ENCODER(MonCommand)