X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Fsocketengines%2Fsocketengine_kqueue.cpp;h=e0a0535f4e8859da6de71de5ffa9cea42027a4c0;hb=d494fa6e094e85cd29235e995fb2b447d6e1f168;hp=c1aa0c6ee9f5f5acfc615b3cf40cc33f1a340ef8;hpb=70cd4a5a06ea4251ca128636e17bf5ff385f9b5b;p=user%2Fhenk%2Fcode%2Finspircd.git diff --git a/src/socketengines/socketengine_kqueue.cpp b/src/socketengines/socketengine_kqueue.cpp index c1aa0c6ee..e0a0535f4 100644 --- a/src/socketengines/socketengine_kqueue.cpp +++ b/src/socketengines/socketengine_kqueue.cpp @@ -1,76 +1,75 @@ -/* +------------------------------------+ - * | Inspire Internet Relay Chat Daemon | - * +------------------------------------+ +/* + * InspIRCd -- Internet Relay Chat Daemon * - * InspIRCd: (C) 2002-2010 InspIRCd Development Team - * See: http://wiki.inspircd.org/Credits + * Copyright (C) 2014-2015 Attila Molnar + * Copyright (C) 2014 Adam + * Copyright (C) 2012-2013, 2017, 2019 Sadie Powell + * Copyright (C) 2012 Robby + * Copyright (C) 2009-2010 Daniel De Graaf + * Copyright (C) 2009 Uli Schlachter + * Copyright (C) 2008 Thomas Stagner + * Copyright (C) 2007 Dennis Friis + * Copyright (C) 2006-2008, 2010 Craig Edwards * - * This program is free but copyrighted software; see - * the file COPYING for details. + * This file is part of InspIRCd. InspIRCd is free software: you can + * redistribute it and/or modify it under the terms of the GNU General Public + * License as published by the Free Software Foundation, version 2. * - * --------------------------------------------------- + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS + * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more + * details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . */ + #include "inspircd.h" -#include "exitcodes.h" + #include #include #include -#include "socketengine.h" +#include -/** A specialisation of the SocketEngine class, designed to use FreeBSD kqueue(). +/** A specialisation of the SocketEngine class, designed to use BSD kqueue(). */ -class KQueueEngine : public SocketEngine +namespace { -private: int EngineHandle; + unsigned int ChangePos = 0; /** These are used by kqueue() to hold socket events */ - struct kevent* ke_list; - /** This is a specialised time value used by kqueue() - */ - struct timespec ts; -public: - /** Create a new KQueueEngine - */ - KQueueEngine(); - /** Delete a KQueueEngine - */ - virtual ~KQueueEngine(); - bool AddFd(EventHandler* eh, int event_mask); - void OnSetEvent(EventHandler* eh, int old_mask, int new_mask); - virtual void DelFd(EventHandler* eh); - virtual int DispatchEvents(); - virtual std::string GetName(); - virtual void RecoverFromFork(); -}; + std::vector ke_list(16); -#include + /** Pending changes + */ + std::vector changelist(8); -KQueueEngine::KQueueEngine() -{ - MAX_DESCRIPTORS = 0; - int mib[2]; - size_t len; - - mib[0] = CTL_KERN; - mib[1] = KERN_MAXFILESPERPROC; - len = sizeof(MAX_DESCRIPTORS); - sysctl(mib, 2, &MAX_DESCRIPTORS, &len, NULL, 0); - if (MAX_DESCRIPTORS <= 0) +#if defined __NetBSD__ && __NetBSD_Version__ <= 999001400 + inline intptr_t udata_cast(EventHandler* eh) { - ServerInstance->Logs->Log("SOCKET", DEFAULT, "ERROR: Can't determine maximum number of open sockets!"); - printf("ERROR: Can't determine maximum number of open sockets!\n"); - ServerInstance->Exit(EXIT_STATUS_SOCKETENGINE); + // On NetBSD <10 the last parameter of EV_SET is intptr_t. + return reinterpret_cast(eh); } +#else + inline void* udata_cast(EventHandler* eh) + { + // On other platforms the last parameter of EV_SET is void*. + return static_cast(eh); + } +#endif +} - this->RecoverFromFork(); - ke_list = new struct kevent[GetMaxFds()]; - ref = new EventHandler* [GetMaxFds()]; - memset(ref, 0, GetMaxFds() * sizeof(EventHandler*)); +/** Initialize the kqueue engine + */ +void SocketEngine::Init() +{ + LookupMaxFds(); + RecoverFromFork(); } -void KQueueEngine::RecoverFromFork() +void SocketEngine::RecoverFromFork() { /* * The only bad thing about kqueue is that its fd cant survive a fork and is not inherited. @@ -79,177 +78,142 @@ void KQueueEngine::RecoverFromFork() */ EngineHandle = kqueue(); if (EngineHandle == -1) - { - ServerInstance->Logs->Log("SOCKET",DEFAULT, "ERROR: Could not initialize socket engine. Your kernel probably does not have the proper features."); - ServerInstance->Logs->Log("SOCKET",DEFAULT, "ERROR: this is a fatal error, exiting now."); - printf("ERROR: Could not initialize socket engine. Your kernel probably does not have the proper features.\n"); - printf("ERROR: this is a fatal error, exiting now.\n"); - ServerInstance->Exit(EXIT_STATUS_SOCKETENGINE); - } - CurrentSetSize = 0; + InitError(); +} + +/** Shutdown the kqueue engine + */ +void SocketEngine::Deinit() +{ + Close(EngineHandle); } -KQueueEngine::~KQueueEngine() +static struct kevent* GetChangeKE() { - this->Close(EngineHandle); - delete[] ref; - delete[] ke_list; + if (ChangePos >= changelist.size()) + changelist.resize(changelist.size() * 2); + return &changelist[ChangePos++]; } -bool KQueueEngine::AddFd(EventHandler* eh, int event_mask) +bool SocketEngine::AddFd(EventHandler* eh, int event_mask) { int fd = eh->GetFd(); - if ((fd < 0) || (fd > GetMaxFds() - 1)) + if (fd < 0) return false; - if (ref[fd]) + if (!SocketEngine::AddFdRef(eh)) return false; // We always want to read from the socket... - struct kevent ke; - EV_SET(&ke, fd, EVFILT_READ, EV_ADD, 0, 0, NULL); + struct kevent* ke = GetChangeKE(); + EV_SET(ke, fd, EVFILT_READ, EV_ADD, 0, 0, udata_cast(eh)); - int i = kevent(EngineHandle, &ke, 1, 0, 0, NULL); - if (i == -1) - { - ServerInstance->Logs->Log("SOCKET",DEFAULT,"Failed to add fd: %d %s", - fd, strerror(errno)); - return false; - } + ServerInstance->Logs->Log("SOCKET", LOG_DEBUG, "New file descriptor: %d", fd); - ref[fd] = eh; - SocketEngine::SetEventMask(eh, event_mask); + eh->SetEventMask(event_mask); OnSetEvent(eh, 0, event_mask); - CurrentSetSize++; + ResizeDouble(ke_list); - ServerInstance->Logs->Log("SOCKET",DEBUG,"New file descriptor: %d", fd); return true; } -void KQueueEngine::DelFd(EventHandler* eh) +void SocketEngine::DelFd(EventHandler* eh) { int fd = eh->GetFd(); - if ((fd < 0) || (fd > GetMaxFds() - 1)) + if (fd < 0) { - ServerInstance->Logs->Log("SOCKET",DEFAULT,"DelFd() on invalid fd: %d", fd); + ServerInstance->Logs->Log("SOCKET", LOG_DEFAULT, "DelFd() on invalid fd: %d", fd); return; } - struct kevent ke; - // First remove the write filter ignoring errors, since we can't be // sure if there are actually any write filters registered. - EV_SET(&ke, eh->GetFd(), EVFILT_WRITE, EV_DELETE, 0, 0, NULL); - kevent(EngineHandle, &ke, 1, 0, 0, NULL); + struct kevent* ke = GetChangeKE(); + EV_SET(ke, eh->GetFd(), EVFILT_WRITE, EV_DELETE, 0, 0, NULL); // Then remove the read filter. - EV_SET(&ke, eh->GetFd(), EVFILT_READ, EV_DELETE, 0, 0, NULL); - int j = kevent(EngineHandle, &ke, 1, 0, 0, NULL); + ke = GetChangeKE(); + EV_SET(ke, eh->GetFd(), EVFILT_READ, EV_DELETE, 0, 0, NULL); - if (j < 0) - { - ServerInstance->Logs->Log("SOCKET",DEFAULT,"Failed to remove fd: %d %s", - fd, strerror(errno)); - } + SocketEngine::DelFdRef(eh); - CurrentSetSize--; - ref[fd] = NULL; - - ServerInstance->Logs->Log("SOCKET",DEBUG,"Remove file descriptor: %d", fd); + ServerInstance->Logs->Log("SOCKET", LOG_DEBUG, "Remove file descriptor: %d", fd); } -void KQueueEngine::OnSetEvent(EventHandler* eh, int old_mask, int new_mask) +void SocketEngine::OnSetEvent(EventHandler* eh, int old_mask, int new_mask) { if ((new_mask & FD_WANT_POLL_WRITE) && !(old_mask & FD_WANT_POLL_WRITE)) { // new poll-style write - struct kevent ke; - EV_SET(&ke, eh->GetFd(), EVFILT_WRITE, EV_ADD, 0, 0, NULL); - int i = kevent(EngineHandle, &ke, 1, 0, 0, NULL); - if (i < 0) { - ServerInstance->Logs->Log("SOCKET",DEFAULT,"Failed to mark for writing: %d %s", - eh->GetFd(), strerror(errno)); - } + struct kevent* ke = GetChangeKE(); + EV_SET(ke, eh->GetFd(), EVFILT_WRITE, EV_ADD, 0, 0, udata_cast(eh)); } else if ((old_mask & FD_WANT_POLL_WRITE) && !(new_mask & FD_WANT_POLL_WRITE)) { // removing poll-style write - struct kevent ke; - EV_SET(&ke, eh->GetFd(), EVFILT_WRITE, EV_DELETE, 0, 0, NULL); - int i = kevent(EngineHandle, &ke, 1, 0, 0, NULL); - if (i < 0) { - ServerInstance->Logs->Log("SOCKET",DEFAULT,"Failed to mark for writing: %d %s", - eh->GetFd(), strerror(errno)); - } + struct kevent* ke = GetChangeKE(); + EV_SET(ke, eh->GetFd(), EVFILT_WRITE, EV_DELETE, 0, 0, NULL); } if ((new_mask & (FD_WANT_FAST_WRITE | FD_WANT_SINGLE_WRITE)) && !(old_mask & (FD_WANT_FAST_WRITE | FD_WANT_SINGLE_WRITE))) { - // new one-shot write - struct kevent ke; - EV_SET(&ke, eh->GetFd(), EVFILT_WRITE, EV_ADD | EV_ONESHOT, 0, 0, NULL); - int i = kevent(EngineHandle, &ke, 1, 0, 0, NULL); - if (i < 0) { - ServerInstance->Logs->Log("SOCKET",DEFAULT,"Failed to mark for writing: %d %s", - eh->GetFd(), strerror(errno)); - } + struct kevent* ke = GetChangeKE(); + EV_SET(ke, eh->GetFd(), EVFILT_WRITE, EV_ADD | EV_ONESHOT, 0, 0, udata_cast(eh)); } } -int KQueueEngine::DispatchEvents() +int SocketEngine::DispatchEvents() { + struct timespec ts; ts.tv_nsec = 0; ts.tv_sec = 1; - int i = kevent(EngineHandle, NULL, 0, &ke_list[0], GetMaxFds(), &ts); + int i = kevent(EngineHandle, &changelist.front(), ChangePos, &ke_list.front(), ke_list.size(), &ts); + ChangePos = 0; ServerInstance->UpdateTime(); - TotalEvents += i; + if (i < 0) + return i; + + stats.TotalEvents += i; for (int j = 0; j < i; j++) { - EventHandler* eh = ref[ke_list[j].ident]; + // This can't be a static_cast because udata is intptr_t on NetBSD. + struct kevent& kev = ke_list[j]; + EventHandler* eh = reinterpret_cast(kev.udata); if (!eh) continue; - if (ke_list[j].flags & EV_EOF) + + // Copy these in case the vector gets resized and kev invalidated + const int fd = eh->GetFd(); + const short filter = kev.filter; + if (fd < 0) + continue; + + if (kev.flags & EV_EOF) { - ErrorEvents++; - eh->HandleEvent(EVENT_ERROR, ke_list[j].fflags); + stats.ErrorEvents++; + eh->OnEventHandlerError(kev.fflags); continue; } - if (ke_list[j].filter == EVFILT_WRITE) + if (filter == EVFILT_WRITE) { - WriteEvents++; /* When mask is FD_WANT_FAST_WRITE or FD_WANT_SINGLE_WRITE, * we set a one-shot write, so we need to clear that bit * to detect when it set again. */ const int bits_to_clr = FD_WANT_SINGLE_WRITE | FD_WANT_FAST_WRITE | FD_WRITE_WILL_BLOCK; - SetEventMask(eh, eh->GetEventMask() & ~bits_to_clr); - eh->HandleEvent(EVENT_WRITE); - - if (eh != ref[ke_list[j].ident]) - // whoops, deleted out from under us - continue; + eh->SetEventMask(eh->GetEventMask() & ~bits_to_clr); + eh->OnEventHandlerWrite(); } - if (ke_list[j].filter == EVFILT_READ) + else if (filter == EVFILT_READ) { - ReadEvents++; - SetEventMask(eh, eh->GetEventMask() & ~FD_READ_WILL_BLOCK); - eh->HandleEvent(EVENT_READ); + eh->SetEventMask(eh->GetEventMask() & ~FD_READ_WILL_BLOCK); + eh->OnEventHandlerRead(); } } return i; } - -std::string KQueueEngine::GetName() -{ - return "kqueue"; -} - -SocketEngine* CreateSocketEngine() -{ - return new KQueueEngine; -}