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The LogRatelimiter class implements a fixed window rate limiter. The rate limiter allows a fixed amount of bytes to be consumed within a fixed time window. [log] Introduce source location type The SourceLocation type stores the filename and line of a source code location. In a later commit we use this type as the key type in an unordered map and set to keep track of rate limters for each location. [config] Add -ratelimitlogging config option The -ratelimitlogging can be used to enable/disable the rate limiting to disk. Rate limiting is enabled by default. [log] Add two new categories for unconditional logging We create two new categories `UNCONDITIONAL_ALWAYS` and `UNCONDITIONAL_RATE_LIMITED` that are always enabled by default. LogPrintf now logs using the `UNCONDITIONAL_RATE_LIMITED` category which will start to apply rate limiting in a later commit. For some log locations it might be safe to allow more frequent logging without rate limiting. These locations should use the `UNCONDITIONAL_ALWAYS` category. [validation] Exempt UpdateTipLog from rate limiting UpdateTipLog logs everytime a new tip is activated. This occurs at an increased frequency during IBD and should therefore be exempt from rate limiting. [log] Add rate limiting to LogPrintf To mitigate disk filling attacks caused by unsafe usages of LogPrintf, we rate limit LogPrintf by using the fixed window rate limiter (BCLog::LogRatelimiter) introduced in an earlier commit. The rate limiting logic is applied per source location instead of globally. A source location is allowed to log up to 1 MiB per hour. Source locations that violate the limit will have their logs supressed for up to one hour. [test util] Mark ~DebugLogHelper as noexcept(false) We mark ~DebugLogHelper as noexcept(false) to be able to catch the exception it throws. This lets us use it in test in combination with BOOST_CHECK_THROW and BOOST_CHECK_NO_THROW to check that certain log messages are (not) logged. [test] Check for expected log rate limiting messages [test] Test for expected file size changes when rate limiting is enabled [test] Check that log rate limiting is disabled for exempt source locations [test] Check that rate limiting can be disabled |
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| .. | ||
| bitcoin-gui.cpp | ||
| bitcoin-node.cpp | ||
| bitcoin-qt.cpp | ||
| bitcoin-wallet.cpp | ||
| bitcoind.cpp | ||
| common.cpp | ||
| common.h | ||