mirror of
https://github.com/FirebirdSQL/firebird.git
synced 2025-01-22 20:03:02 +01:00
Frontported fix for CORE-3194: Number of connections to linux superclassic has limit equal 508
This commit is contained in:
alexpeshkoff
parent
44cc684fb7
commit
20b15687c9
@ -667,6 +667,7 @@ AC_CHECK_HEADERS(semaphore.h)
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AC_CHECK_HEADERS(float.h)
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AC_CHECK_HEADERS(atomic.h)
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AC_CHECK_HEADERS(atomic_ops.h)
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AC_CHECK_HEADERS(poll.h)
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dnl check for ICU presence
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AC_CHECK_HEADER(unicode/ucnv.h,,AC_MSG_ERROR(ICU support not found - please install development ICU package))
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@ -790,6 +791,7 @@ AC_CHECK_FUNCS(semtimedop)
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AC_CHECK_FUNCS(fegetenv)
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AC_CHECK_FUNCS(strerror_r)
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AC_CHECK_FUNCS(fdatasync fsync)
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AC_CHECK_FUNCS(poll)
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dnl AC_CHECK_FUNCS(AO_compare_and_swap_full)
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM([[#include <atomic_ops.h>]], [[AO_T x; AO_compare_and_swap_full(&x, 0, 0); return 0;]])],
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@ -88,9 +88,13 @@
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#include <netdb.h>
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#include <arpa/inet.h>
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#include <sys/wait.h>
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#ifdef HAVE_SYS_SELECT_H
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#if defined(HAVE_POLL_H)
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#include <poll.h>
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#elif defined(HAVE_SYS_SELECT_H)
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#include <sys/select.h>
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#endif
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#endif // !WIN_NT
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const int INET_RETRY_CALL = 5;
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@ -229,12 +233,175 @@ const SLONG DEF_MAX_DATA = 8192;
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const int SELECT_TIMEOUT = 60; // Dispatch thread select timeout (sec)
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struct slct_t
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class Select
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{
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int slct_width;
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int slct_count;
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#ifdef HAVE_POLL
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private:
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static const int SEL_INIT_EVENTS = POLLIN;
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static const int SEL_CHECK_MASK = POLLIN;
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pollfd* getPollFd(int n)
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{
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pollfd* const end = slct_poll.end();
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for (pollfd* pf = slct_poll.begin(); pf < end; ++pf)
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{
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if (n == pf->fd)
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{
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return pf;
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}
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}
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return NULL;
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}
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static int compare(const void* a, const void* b)
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{
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// use C-cast here to be for sure compatible with libc
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return ((pollfd*)a)->fd - ((pollfd*)b)->fd;
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}
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#endif
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public:
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#ifdef HAVE_POLL
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Select()
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: slct_time(0), slct_count(0), slct_poll(*getDefaultMemoryPool())
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{ }
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#else
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Select()
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: slct_time(0), slct_count(0), slct_width(0)
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{
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memset(&slct_fdset, 0, sizeof slct_fdset);
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}
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#endif
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enum HandleState {SEL_BAD, SEL_DISCONNECTED, SEL_NO_DATA, SEL_READY};
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HandleState ok(const rem_port* port)
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{
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SOCKET n = port->port_handle;
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#if defined(WIN_NT)
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return FD_ISSET(n, &slct_fdset) ? SEL_READY : SEL_NO_DATA;
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#elif defined(HAVE_POLL)
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const pollfd* pf = getPollFd(n);
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if (pf)
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{
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return pf->events & SEL_CHECK_MASK ? SEL_READY : SEL_NO_DATA;
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}
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return (n < 0) ? (port->port_flags & PORT_disconnect ? SEL_DISCONNECTED : SEL_BAD) : SEL_NO_DATA;
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#else
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if (n < 0 || n >= FD_SETSIZE)
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{
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return port->port_flags & PORT_disconnect ? SEL_DISCONNECTED : SEL_BAD;
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}
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return (n < slct_width && FD_ISSET(n, &slct_fdset)) ? SEL_READY : SEL_NO_DATA;
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#endif
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}
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void unset(SOCKET handle)
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{
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#if defined(HAVE_POLL)
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pollfd* pf = getPollFd(handle);
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if (pf)
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{
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pf->events = 0;
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}
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#else
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FD_CLR(handle, &slct_fdset);
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--slct_count;
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#endif
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}
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void set(SOCKET handle)
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{
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#ifdef HAVE_POLL
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pollfd* pf = getPollFd(handle);
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if (pf)
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{
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pf->events = SEL_INIT_EVENTS;
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return;
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}
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pollfd f;
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f.fd = handle;
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f.events = SEL_INIT_EVENTS;
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slct_poll.push(f);
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#else
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FD_SET(handle, &slct_fdset);
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#ifdef WIN_NT
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++slct_width;
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#else
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slct_width = MAX(slct_width, handle + 1);
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#endif // WIN_NT
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#endif // HAVE_POLL
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}
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void clear()
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{
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slct_count = 0;
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#if defined(HAVE_POLL)
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slct_poll.clear();
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#else
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slct_width = 0;
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FD_ZERO(&slct_fdset);
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#endif
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}
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int select(timeval* timeout)
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{
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bool hasRequest = false;
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#ifdef HAVE_POLL
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pollfd* const end = slct_poll.end();
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for (pollfd* pf = slct_poll.begin(); pf < end; ++pf)
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{
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pf->revents = pf->events;
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if (pf->events & SEL_CHECK_MASK)
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{
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hasRequest = true;
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}
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}
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if (!hasRequest)
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{
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errno = NOTASOCKET;
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return -1;
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}
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int milliseconds = timeout ? timeout->tv_sec * 1000 + timeout->tv_usec / 1000 : -1;
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slct_count = ::poll(slct_poll.begin(), slct_poll.getCount(), milliseconds);
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for (pollfd* pf = slct_poll.begin(); pf < end; ++pf)
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{
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pf->events = pf->revents;
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}
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#else
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#ifdef WIN_NT
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slct_count = ::select(FD_SETSIZE, &slct_fdset, NULL, NULL, timeout);
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#else
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slct_count = ::select(slct_width, &slct_fdset, NULL, NULL, timeout);
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#endif // WIN_NT
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#endif // HAVE_POLL
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return slct_count;
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}
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int getCount()
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{
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return slct_count;
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}
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time_t slct_time;
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private:
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int slct_count;
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#ifdef HAVE_POLL
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Firebird::HalfStaticArray<pollfd, 8> slct_poll;
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#else
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int slct_width;
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fd_set slct_fdset;
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#endif
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};
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static bool accept_connection(rem_port*, const P_CNCT*);
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@ -309,9 +476,9 @@ static bool packet_send(rem_port*, const SCHAR*, SSHORT);
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static rem_port* receive(rem_port*, PACKET *);
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static rem_port* select_accept(rem_port*);
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static void select_port(rem_port*, slct_t*, RemPortPtr&);
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static void select_port(rem_port*, Select*, RemPortPtr&);
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static bool select_multi(rem_port*, UCHAR* buffer, SSHORT bufsize, SSHORT* length, RemPortPtr&);
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static bool select_wait(rem_port*, slct_t*);
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static bool select_wait(rem_port*, Select*);
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static int send_full(rem_port*, PACKET *);
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static int send_partial(rem_port*, PACKET *);
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@ -365,7 +532,7 @@ SLONG INET_remote_buffer;
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static Firebird::GlobalPtr<Firebird::Mutex> init_mutex;
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static volatile bool INET_initialized = false;
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static volatile bool INET_shutting_down = false;
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static slct_t INET_select = { 0, 0, 0 };
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static Select INET_select;
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static rem_port* inet_async_receive = NULL;
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@ -1168,20 +1335,15 @@ static rem_port* aux_connect(rem_port* port, PACKET* packet)
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timeout.tv_sec = port->port_connect_timeout;
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timeout.tv_usec = 0;
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fd_set slct_fdset;
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FD_ZERO(&slct_fdset);
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FD_SET(port->port_channel, &slct_fdset);
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Select slct;
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slct.set(port->port_channel);
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int inetErrNo = 0;
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while (true)
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{
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const int count =
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#ifdef WIN_NT
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select(FD_SETSIZE, &slct_fdset, NULL, NULL, &timeout);
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#else
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select(port->port_channel + 1, &slct_fdset, NULL, NULL, &timeout);
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#endif
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slct.select(&timeout);
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const int count = slct.getCount();
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inetErrNo = INET_ERRNO;
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if (count != -1 || !INTERRUPT_ERROR(inetErrNo))
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@ -1461,10 +1623,10 @@ static void disconnect(rem_port* const port)
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#ifdef DEBUG
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if (INET_trace & TRACE_summary)
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{
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fprintf(stdout, "INET_count_send = %lu packets\n", INET_count_send);
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fprintf(stdout, "INET_bytes_send = %lu bytes\n", INET_bytes_send);
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fprintf(stdout, "INET_count_recv = %lu packets\n", INET_count_recv);
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fprintf(stdout, "INET_bytes_recv = %lu bytes\n", INET_bytes_recv);
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fprintf(stdout, "INET_count_send = %u packets\n", INET_count_send);
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fprintf(stdout, "INET_bytes_send = %u bytes\n", INET_bytes_send);
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fprintf(stdout, "INET_count_recv = %u packets\n", INET_count_recv);
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fprintf(stdout, "INET_bytes_recv = %u bytes\n", INET_bytes_recv);
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fflush(stdout);
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}
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#endif
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@ -1826,7 +1988,7 @@ static rem_port* receive( rem_port* main_port, PACKET * packet)
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op_rec_count++;
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if (INET_trace & TRACE_operations)
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{
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fprintf(stdout, "%04lu: OP Recd %5lu opcode %d\n",
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fprintf(stdout, "%04u: OP Recd %5u opcode %d\n",
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inet_debug_timer(),
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op_rec_count, packet->p_operation);
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fflush(stdout);
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@ -1949,7 +2111,7 @@ static rem_port* select_accept( rem_port* main_port)
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return 0;
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}
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static void select_port(rem_port* main_port, slct_t* selct, RemPortPtr& port)
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static void select_port(rem_port* main_port, Select* selct, RemPortPtr& port)
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{
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/**************************************
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*
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@ -1971,33 +2133,36 @@ static void select_port(rem_port* main_port, slct_t* selct, RemPortPtr& port)
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for (port = main_port; port; port = port->port_next)
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{
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const SOCKET n = port->port_handle;
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#ifdef WIN_NT
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const int ok = FD_ISSET(n, &selct->slct_fdset);
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#else
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if (n < 0 || n >= FD_SETSIZE)
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Select::HandleState result = selct->ok(port);
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selct->unset(port->port_handle);
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switch (result)
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{
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if (port->port_flags & PORT_disconnect)
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case Select::SEL_BAD:
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if (port->port_state == rem_port::BROKEN)
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{
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continue;
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}
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return;
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case Select::SEL_DISCONNECTED:
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continue;
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return;
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}
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const int ok = n < selct->slct_width && FD_ISSET(n, &selct->slct_fdset);
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#endif
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if (ok)
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{
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case Select::SEL_READY:
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port->port_dummy_timeout = port->port_dummy_packet_interval;
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FD_CLR(n, &selct->slct_fdset);
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--selct->slct_count;
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return;
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default:
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break;
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}
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if (port->port_dummy_timeout < 0) {
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if (port->port_dummy_timeout < 0)
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{
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return;
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}
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}
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}
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static bool select_wait( rem_port* main_port, slct_t* selct)
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static bool select_wait( rem_port* main_port, Select* selct)
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{
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/**************************************
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*
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@ -2016,8 +2181,7 @@ static bool select_wait( rem_port* main_port, slct_t* selct)
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for (;;)
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{
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selct->slct_count = selct->slct_width = 0;
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FD_ZERO(&selct->slct_fdset);
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selct->clear();
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bool found = false;
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// Use the time interval between select() calls to expire
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@ -2075,16 +2239,10 @@ static bool select_wait( rem_port* main_port, slct_t* selct)
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port->port_handle);
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// this will lead to receive() which will break bad connection
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selct->slct_count = selct->slct_width = 0;
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FD_ZERO(&selct->slct_fdset);
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selct->clear();
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if (!badSocket)
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{
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FD_SET(port->port_handle, &selct->slct_fdset);
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#ifdef WIN_NT
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++selct->slct_width;
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#else
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selct->slct_width = port->port_handle + 1;
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#endif
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selct->set(port->port_handle);
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}
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return true;
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}
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@ -2094,12 +2252,7 @@ static bool select_wait( rem_port* main_port, slct_t* selct)
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// if process is shuting down - don't listen on main port
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if (!INET_shutting_down || port != main_port)
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{
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FD_SET(port->port_handle, &selct->slct_fdset);
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#ifdef WIN_NT
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++selct->slct_width;
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#else
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selct->slct_width = MAX(selct->slct_width, port->port_handle + 1);
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#endif
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selct->set(port->port_handle);
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found = true;
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}
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}
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@ -2130,30 +2283,26 @@ static bool select_wait( rem_port* main_port, slct_t* selct)
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timeout.tv_sec = SELECT_TIMEOUT;
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timeout.tv_usec = 0;
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#ifdef WIN_NT
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selct->slct_count = select(FD_SETSIZE, &selct->slct_fdset, NULL, NULL, &timeout);
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#else
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selct->slct_count = select(selct->slct_width, &selct->slct_fdset, NULL, NULL, &timeout);
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#endif
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selct->select(&timeout);
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const int inetErrNo = INET_ERRNO;
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//if (INET_shutting_down) {
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// return false;
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//}
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if (selct->slct_count != -1)
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if (selct->getCount() != -1)
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{
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// if selct->slct_count is zero it means that we timed out of
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// select with nothing to read or accept, so clear the fd_set
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// bit as this value is undefined on some platforms (eg. HP-UX),
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// when the select call times out. Once these bits are cleared
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// they can be used in select_port()
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if (selct->slct_count == 0)
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if (selct->getCount() == 0)
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{
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Firebird::MutexLockGuard guard(port_mutex);
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for (rem_port* port = main_port; port; port = port->port_next)
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{
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FD_CLR(port->port_handle, &selct->slct_fdset);
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selct->unset(port->port_handle);
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}
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}
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return true;
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@ -2197,7 +2346,7 @@ static int send_full( rem_port* port, PACKET * packet)
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op_sent_count++;
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if (INET_trace & TRACE_operations)
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{
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fprintf(stdout, "%05lu: OP Sent %5lu opcode %d\n", inet_debug_timer(),
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fprintf(stdout, "%05u: OP Sent %5u opcode %d\n", inet_debug_timer(),
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op_sent_count, packet->p_operation);
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fflush(stdout);
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}
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@ -2226,7 +2375,7 @@ static int send_partial( rem_port* port, PACKET * packet)
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op_sentp_count++;
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if (INET_trace & TRACE_operations)
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{
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fprintf(stdout, "%05lu: OP Sent %5lu opcode %d (partial)\n", inet_debug_timer(),
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fprintf(stdout, "%05u: OP Sent %5u opcode %d (partial)\n", inet_debug_timer(),
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op_sentp_count, packet->p_operation);
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fflush(stdout);
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}
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@ -2802,7 +2951,7 @@ static void packet_print(const TEXT* string, const UCHAR* packet, int length, UL
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for (int l = length; l > 0; --l)
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sum += *packet++;
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fprintf(stdout, "%05lu: PKT %s\t(%lu): length = %4d, checksum = %d\n",
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fprintf(stdout, "%05u: PKT %s\t(%u): length = %4d, checksum = %d\n",
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inet_debug_timer(), string, counter, length, sum);
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fflush(stdout);
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}
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@ -2875,18 +3024,14 @@ static bool packet_receive(rem_port* port, UCHAR* buffer, SSHORT buffer_length,
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if ( !(port->port_flags & PORT_async) )
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{
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fd_set slct_fdset;
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FD_ZERO(&slct_fdset);
|
||||
FD_SET(ph, &slct_fdset);
|
||||
Select slct;
|
||||
slct.set(ph);
|
||||
|
||||
int slct_count;
|
||||
for (;;)
|
||||
{
|
||||
#if (defined WIN_NT)
|
||||
slct_count = select(FD_SETSIZE, &slct_fdset, NULL, NULL, time_ptr);
|
||||
#else
|
||||
slct_count = select(port->port_handle + 1, &slct_fdset, NULL, NULL, time_ptr);
|
||||
#endif
|
||||
slct.select(time_ptr);
|
||||
slct_count = slct.getCount();
|
||||
inetErrNo = INET_ERRNO;
|
||||
|
||||
// restore original timeout value FSG 3 MAY 2001
|
||||
@ -2916,7 +3061,7 @@ static bool packet_receive(rem_port* port, UCHAR* buffer, SSHORT buffer_length,
|
||||
#ifdef DEBUG
|
||||
if (INET_trace & TRACE_operations)
|
||||
{
|
||||
fprintf(stdout, "%05lu: OP Sent: op_dummy\n", inet_debug_timer());
|
||||
fprintf(stdout, "%05u: OP Sent: op_dummy\n", inet_debug_timer());
|
||||
fflush(stdout);
|
||||
}
|
||||
#endif
|
||||
|
||||
Loading…
Reference in New Issue
Block a user