ceph/src/common/config_values.cc

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 #include "config_values.h"
   3
   4 #include "config.h"
   5 #if WITH_SEASTAR
   6 #include "crimson/common/log.h"
   7 #endif
   8
   9 ConfigValues::set_value_result_t
  10 ConfigValues::set_value(const std::string_view key,
  11                         Option::value_t&& new_value,
  12                         int level)
  13 {
  14   if (auto p = values.find(key); p != values.end()) {
  15     auto q = p->second.find(level);
  16     if (q != p->second.end()) {
  17       if (new_value == q->second) {
  18         return SET_NO_CHANGE;
  19       }
  20       q->second = std::move(new_value);
  21     } else {
  22       p->second[level] = std::move(new_value);
  23     }
  24     if (p->second.rbegin()->first > level) {
  25       // there was a higher priority value; no effect
  26       return SET_NO_EFFECT;
  27     } else {
  28       return SET_HAVE_EFFECT;
  29     }
  30   } else {
  31     values[key][level] = std::move(new_value);
  32     return SET_HAVE_EFFECT;
  33   }
  34 }
  35
  36 int ConfigValues::rm_val(const std::string_view key, int level)
  37 {
  38   auto i = values.find(key);
  39   if (i == values.end()) {
  40     return -ENOENT;
  41   }
  42   auto j = i->second.find(level);
  43   if (j == i->second.end()) {
  44     return -ENOENT;
  45   }
  46   bool matters = (j->first == i->second.rbegin()->first);
  47   i->second.erase(j);
  48   if (matters) {
  49     return SET_HAVE_EFFECT;
  50   } else {
  51     return SET_NO_EFFECT;
  52   }
  53 }
  54
  55 std::pair<Option::value_t, bool>
  56 ConfigValues::get_value(const std::string_view name, int level) const
  57 {
  58   auto p = values.find(name);
  59   if (p != values.end() && !p->second.empty()) {
  60     // use highest-priority value available (see CONF_*)
  61     if (level < 0) {
  62       return {p->second.rbegin()->second, true};
  63     } else if (auto found = p->second.find(level);
  64                found != p->second.end()) {
  65       return {found->second, true};
  66     }
  67   }
  68   return {Option::value_t{}, false};
  69 }
  70
  71 void ConfigValues::set_logging(int which, const char* val)
  72 {
  73   int log, gather;
  74   int r = sscanf(val, "%d/%d", &log, &gather);
  75   if (r >= 1) {
  76     if (r < 2) {
  77       gather = log;
  78     }
  79     subsys.set_log_level(which, log);
  80     subsys.set_gather_level(which, gather);
  81 #if WITH_SEASTAR
  82     crimson::get_logger(which).set_level(crimson::to_log_level(log));
  83 #endif
  84   }
  85 }
  86
  87 bool ConfigValues::contains(const std::string_view key) const
  88 {
  89   return values.count(key);
  90 }