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init: reserve file descriptors for bind() and accept() 

And fix the amount of descriptors requested

Co-authored-by: tryphe <tryphe@noreply.github.com>
This commit is contained in:
Ben Woosley 2023-04-28 13:24:56 -05:00 committed by Benjamin Woosley
parent bf3369995e
commit 44872b32bc
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GPG Key ID: 609F2AB495D8C15C
1 changed files with 6 additions and 10 deletions
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16
src/init.cpp
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@ -973,21 +973,17 @@ bool AppInitParameterInteraction(const ArgsManager& args)
const int nBind = std::max(nUserBind, size_t(1));
nUserMaxConnections = args.GetIntArg("-maxconnections", DEFAULT_MAX_PEER_CONNECTIONS);
nMaxConnections = std::max(nUserMaxConnections, 0);
const int nFDMin = nBind + RESERVED_FILE_DESCRIPTORS;
const int nRpcThreads = std::max<int>(args.GetIntArg("-rpcthreads", DEFAULT_HTTP_THREADS), 1L);
const int nFDMin = nBind + nRpcThreads + RESERVED_FILE_DESCRIPTORS;
nFD = RaiseFileDescriptorLimit(nMaxConnections + nFDMin);
if (nFD < nFDMin) {
return InitError(strprintf(_("Not enough file descriptors available. %d available, %d required."), nFD, nFDMin));
}
#ifdef USE_POLL
int fd_max = nFD;
#else
int fd_max = FD_SETSIZE;
#endif
// Trim requested connection counts, to fit into system limitations
// <int> in std::min<int>(...) to work around FreeBSD compilation issue described in #2695
nMaxConnections = std::max(std::min<int>(nMaxConnections, fd_max - nFDMin), 0);
if (nFD < MIN_CORE_FILEDESCRIPTORS)
return InitError(_("Not enough file descriptors available."));
nMaxConnections = std::min(nFD - RESERVED_FILE_DESCRIPTORS, nMaxConnections);
nMaxConnections = std::max(std::min<int>(nFD - nFDMin, nMaxConnections), 0);
LogPrintf("There are %d file descriptors available, %d required, %d reserved, and %d requested.\n", nFD, nFDMin, nFDMin + nMaxConnections, nFDMin + nUserMaxConnections);
if (nMaxConnections < nUserMaxConnections)