Merge #21041: log: Move "Pre-allocating up to position 0x[…] in […].dat" log message to debug category

25f899c log: Move "Pre-allocating up to position 0x[...] in [...].dat" log message to debug category (practicalswift)
acd7980 log: Move "Leaving block file [...]: [...]" log message to debug category (practicalswift)

Pull request description:

  Move `Pre-allocating up to position 0x[…] in […].dat` log message to debug category.

  After the cleanup of `-debug=net` log messages PR (#20724) was merged recently the console log now has very high signal to noise ratio. That's great! :)

  This PR increases the signal to noise ratio slightly more by moving the most common remaining implementation detail log message (`Pre-allocating up to position 0x[…] in […].dat`) to the debug category where it belongs :)

  Expected standard output from `bitcoind` (when in steady state) before this patch:

  ```
  $ src/bitcoind
  …
  0000-00-00T00:00:00Z UpdateTip: new best=0000000000000000000000000000000000000000000000000000000000000000 height=000000 version=0x00000000 log0_work=00.000000 tx=000000000 date='0000-00-00T00:00:00Z' progress=0.000000 cache=000.0MiB(0000000txo)
  0000-00-00T00:00:00Z UpdateTip: new best=0000000000000000000000000000000000000000000000000000000000000000 height=000000 version=0x00000000 log0_work=00.000000 tx=000000000 date='0000-00-00T00:00:00Z' progress=0.000000 cache=000.0MiB(0000000txo)
  0000-00-00T00:00:00Z Pre-allocating up to position 0x0000000 in blk00000.dat
  0000-00-00T00:00:00Z Pre-allocating up to position 0x000000 in rev00000.dat
  0000-00-00T00:00:00Z UpdateTip: new best=0000000000000000000000000000000000000000000000000000000000000000 height=000000 version=0x00000000 log0_work=00.000000 tx=000000000 date='0000-00-00T00:00:00Z' progress=0.000000 cache=000.0MiB(0000000txo)
  0000-00-00T00:00:00Z UpdateTip: new best=0000000000000000000000000000000000000000000000000000000000000000 height=000000 version=0x00000000 log0_work=00.000000 tx=000000000 date='0000-00-00T00:00:00Z' progress=0.000000 cache=000.0MiB(0000000txo)
  0000-00-00T00:00:00Z UpdateTip: new best=0000000000000000000000000000000000000000000000000000000000000000 height=000000 version=0x00000000 log0_work=00.000000 tx=000000000 date='0000-00-00T00:00:00Z' progress=0.000000 cache=000.0MiB(0000000txo)
  ```

  Expected standard output from `bitcoind` (when in steady state) after this patch:

  ```
  $ src/bitcoind
  …
  0000-00-00T00:00:00Z UpdateTip: new best=0000000000000000000000000000000000000000000000000000000000000000 height=000000 version=0x00000000 log0_work=00.000000 tx=000000000 date='0000-00-00T00:00:00Z' progress=0.000000 cache=000.0MiB(0000000txo)
  0000-00-00T00:00:00Z UpdateTip: new best=0000000000000000000000000000000000000000000000000000000000000000 height=000000 version=0x00000000 log0_work=00.000000 tx=000000000 date='0000-00-00T00:00:00Z' progress=0.000000 cache=000.0MiB(0000000txo)
  0000-00-00T00:00:00Z UpdateTip: new best=0000000000000000000000000000000000000000000000000000000000000000 height=000000 version=0x00000000 log0_work=00.000000 tx=000000000 date='0000-00-00T00:00:00Z' progress=0.000000 cache=000.0MiB(0000000txo)
  0000-00-00T00:00:00Z UpdateTip: new best=0000000000000000000000000000000000000000000000000000000000000000 height=000000 version=0x00000000 log0_work=00.000000 tx=000000000 date='0000-00-00T00:00:00Z' progress=0.000000 cache=000.0MiB(0000000txo)
  0000-00-00T00:00:00Z UpdateTip: new best=0000000000000000000000000000000000000000000000000000000000000000 height=000000 version=0x00000000 log0_work=00.000000 tx=000000000 date='0000-00-00T00:00:00Z' progress=0.000000 cache=000.0MiB(0000000txo)
  ```

  I find the latter alternative much easier to visually scan for anomalies (and more aesthetically pleasing TBH!).

  Non-GUI users deserve nice interfaces too :)

ACKs for top commit:
  laanwj:
    ACK 25f899c

Tree-SHA512: 5970798c41b041527ebdcbd843c5e136c257c28c3b21fc74102da8970406ca5c0c7e406305c5e6e67de5c1708dc1858af07a77a2e05f44159b7103423e8ab32f

Author: laanwj

src/flatfile.cpp

@@ -66,7 +66,7 @@ size_t FlatFileSeq::Allocate(const FlatFilePos& pos, size_t add_size, bool& out_
         if (CheckDiskSpace(m_dir, inc_size)) {
             FILE *file = Open(pos);
             if (file) {
-                LogPrintf("Pre-allocating up to position 0x%x in %s%05u.dat\n", new_size, m_prefix, pos.nFile);
+                LogPrint(BCLog::VALIDATION, "Pre-allocating up to position 0x%x in %s%05u.dat\n", new_size, m_prefix, pos.nFile);
                 AllocateFileRange(file, pos.nPos, inc_size);
                 fclose(file);
                 return inc_size;

src/validation.cpp

@@ -3209,7 +3209,7 @@ static bool FindBlockPos(FlatFilePos &pos, unsigned int nAddSize, unsigned int n
 
     if ((int)nFile != nLastBlockFile) {
         if (!fKnown) {
-            LogPrintf("Leaving block file %i: %s\n", nLastBlockFile, vinfoBlockFile[nLastBlockFile].ToString());
+            LogPrint(BCLog::VALIDATION, "Leaving block file %i: %s\n", nLastBlockFile, vinfoBlockFile[nLastBlockFile].ToString());
         }
         FlushBlockFile(!fKnown, finalize_undo);
         nLastBlockFile = nFile;