1 files changed, 42 insertions, 13 deletions

diff --git a/src/logging.h b/src/logging.h
index 50869ad89a..fe91ee43a5 100644
--- a/src/logging.h
+++ b/src/logging.h
@@ -7,8 +7,8 @@
 #define BITCOIN_LOGGING_H
 
 #include <fs.h>
-#include <tinyformat.h>
 #include <threadsafety.h>
+#include <tinyformat.h>
 #include <util/string.h>
 
 #include <atomic>
@@ -17,6 +17,7 @@
 #include <list>
 #include <mutex>
 #include <string>
+#include <unordered_map>
 #include <vector>
 
 static const bool DEFAULT_LOGTIMEMICROS = false;
@@ -68,12 +69,14 @@ namespace BCLog {
         ALL         = ~(uint32_t)0,
     };
     enum class Level {
-        Debug = 0,
-        None = 1,
-        Info = 2,
-        Warning = 3,
-        Error = 4,
+        Trace = 0, // High-volume or detailed logging for development/debugging
+        Debug,     // Reasonably noisy logging, but still usable in production
+        Info,      // Default
+        Warning,
+        Error,
+        None, // Internal use only
     };
+    constexpr auto DEFAULT_LOG_LEVEL{Level::Debug};
 
     class Logger
     {
@@ -91,6 +94,13 @@ namespace BCLog {
          */
         std::atomic_bool m_started_new_line{true};
 
+        //! Category-specific log level. Overrides `m_log_level`.
+        std::unordered_map<LogFlags, Level> m_category_log_levels GUARDED_BY(m_cs);
+
+        //! If there is no category-specific log level, all logs with a severity
+        //! level lower than `m_log_level` will be ignored.
+        std::atomic<Level> m_log_level{DEFAULT_LOG_LEVEL};
+
         /** Log categories bitfield. */
         std::atomic<uint32_t> m_categories{0};
 
@@ -112,7 +122,7 @@ namespace BCLog {
         std::atomic<bool> m_reopen_file{false};
 
         /** Send a string to the log output */
-        void LogPrintStr(const std::string& str, const std::string& logging_function, const std::string& source_file, const int source_line, const BCLog::LogFlags category, const BCLog::Level level);
+        void LogPrintStr(const std::string& str, const std::string& logging_function, const std::string& source_file, int source_line, BCLog::LogFlags category, BCLog::Level level);
 
         /** Returns whether logs will be written to any output */
         bool Enabled() const
@@ -143,6 +153,22 @@ namespace BCLog {
 
         void ShrinkDebugFile();
 
+        std::unordered_map<LogFlags, Level> CategoryLevels() const
+        {
+            StdLockGuard scoped_lock(m_cs);
+            return m_category_log_levels;
+        }
+        void SetCategoryLogLevel(const std::unordered_map<LogFlags, Level>& levels)
+        {
+            StdLockGuard scoped_lock(m_cs);
+            m_category_log_levels = levels;
+        }
+        bool SetCategoryLogLevel(const std::string& category_str, const std::string& level_str);
+
+        Level LogLevel() const { return m_log_level.load(); }
+        void SetLogLevel(Level level) { m_log_level = level; }
+        bool SetLogLevel(const std::string& level);
+
         uint32_t GetCategoryMask() const { return m_categories.load(); }
 
         void EnableCategory(LogFlags flag);
@@ -151,6 +177,8 @@ namespace BCLog {
         bool DisableCategory(const std::string& str);
 
         bool WillLogCategory(LogFlags category) const;
+        bool WillLogCategoryLevel(LogFlags category, Level level) const;
+
         /** Returns a vector of the log categories in alphabetical order. */
         std::vector<LogCategory> LogCategoriesList() const;
         /** Returns a string with the log categories in alphabetical order. */
@@ -159,6 +187,12 @@ namespace BCLog {
             return Join(LogCategoriesList(), ", ", [&](const LogCategory& i) { return i.category; });
         };
 
+        //! Returns a string with all user-selectable log levels.
+        std::string LogLevelsString() const;
+
+        //! Returns the string representation of a log level.
+        std::string LogLevelToStr(BCLog::Level level) const;
+
         bool DefaultShrinkDebugFile() const;
     };
 
@@ -169,12 +203,7 @@ BCLog::Logger& LogInstance();
 /** Return true if log accepts specified category, at the specified level. */
 static inline bool LogAcceptCategory(BCLog::LogFlags category, BCLog::Level level)
 {
-    // Log messages at Warning and Error level unconditionally, so that
-    // important troubleshooting information doesn't get lost.
-    if (level >= BCLog::Level::Warning) {
-        return true;
-    }
-    return LogInstance().WillLogCategory(category);
+    return LogInstance().WillLogCategoryLevel(category, level);
 }
 
 /** Return true if str parses as a log category and set the flag */