/*
* void init_netio(void)
*
* Input: None
* Output: None
* Side Effects: This is a needed exported function which will
* be called to initialise the network loop code.
*/
void
init_netio(void)
{
sigio_signal = SIGRTMIN;
pfds = MyMalloc(MAXCONNECTIONS * sizeof(struct pollfd));
index_to_fde = MyMalloc(MAXCONNECTIONS * sizeof(fde_t *));
mask_our_signal(sigio_signal);
}
/*
* void init_netio(void)
*
* Input: None
* Output: None
* Side Effects: This is a needed exported function which will
* be called to initialise the network loop code.
*/
void init_netio(void)
{
int fd;
sigio_signal = SIGRTMIN;
for (fd = 0; fd < MAXCONNECTIONS; fd++)
{
pollfd_list.pollfds[fd].fd = -1;
}
pollfd_list.maxindex = 0;
mask_our_signal(sigio_signal);
}
/*
* void init_netio(void)
*
* Input: None
* Output: None
* Side Effects: This is a needed exported function which will
* be called to initialise the network loop code.
*/
void
init_netio(void)
{
int fd;
my_pid = getpid();
for (fd = 0; fd < HARD_FDLIMIT; fd++)
pollfd_list.pollfds[fd].fd = -1;
pollfd_list.maxindex = 0;
mask_our_signal(SIGIO_SIGNAL);
}
/*
* init_netio
*
* This is a needed exported function which will be called to initialise
* the network loop code.
*/
void
init_netio(void)
{
int fd;
pollfd_list.pollfds = MyMalloc(maxconnections * sizeof(struct pollfd));
for (fd = 0; fd < maxconnections; fd++)
{
pollfd_list.pollfds[fd].fd = -1;
}
pollfd_list.maxindex = 0;
sigio_signal = SIGRTMIN;
sigio_is_screwed = 1; /* Start off with poll first.. */
mask_our_signal(sigio_signal);
}
/* int comm_select(unsigned long delay)
* Input: The maximum time to delay.
* Output: Returns -1 on error, 0 on success.
* Side-effects: Deregisters future interest in IO and calls the handlers
* if an event occurs for an FD.
* Comments: Check all connections for new connections and input data
* that is to be processed. Also check for connections with data queued
* and whether we can write it out.
* Called to do the new-style IO, courtesy of of squid (like most of this
* new IO code). This routine handles the stuff we've hidden in
* comm_setselect and fd_table[] and calls callbacks for IO ready
* events.
*/
int comm_select(unsigned long delay)
{
int num = 0;
int revents = 0;
int sig;
int fd;
int ci;
PF *hdl;
fde_t *F;
struct siginfo si;
struct timespec timeout;
timeout.tv_sec = 0;
timeout.tv_nsec = 1000000 * delay;
for (;;)
{
if (!sigio_is_screwed)
{
if ((sig = sigtimedwait(&our_sigset, &si, &timeout)) > 0)
{
if (sig == SIGIO)
{
ilog(L_WARN, "Kernel RT Signal queue overflowed. Is /proc/sys/kernel/rtsig-max too small?");
sigio_is_screwed = 1;
break;
}
fd = si.si_fd;
pollfd_list.pollfds[fd].revents |= si.si_band;
revents = pollfd_list.pollfds[fd].revents;
num++;
F = &fd_table[fd];
set_time();
if (revents & (POLLRDNORM | POLLIN | POLLHUP | POLLERR))
{
callbacks_called++;
hdl = F->read_handler;
F->read_handler = NULL;
poll_update_pollfds(fd, POLLIN, NULL);
if (hdl)
hdl(fd, F->read_data);
}
if (revents & (POLLWRNORM | POLLOUT | POLLHUP | POLLERR))
{
callbacks_called++;
hdl = F->write_handler;
F->write_handler = NULL;
poll_update_pollfds(fd, POLLOUT, NULL);
if (hdl)
hdl(fd, F->write_data);
}
} else
break;
} else
break;
}
if (!sigio_is_screwed) /* We don't need to proceed */
{
set_time();
return 0;
}
for (;;)
{
if (sigio_is_screwed)
{
signal(sigio_signal, SIG_IGN);
signal(sigio_signal, SIG_DFL);
sigio_is_screwed = 0;
}
num = poll(pollfd_list.pollfds, pollfd_list.maxindex + 1, 0);
if (num >= 0)
break;
if (ignoreErrno(errno))
continue;
/* error! */
set_time();
return -1;
/* NOTREACHED */
}
/* update current time again, eww.. */
set_time();
if (num == 0)
return 0;
/* XXX we *could* optimise by falling out after doing num fds ... */
for (ci = 0; ci < pollfd_list.maxindex + 1; ci++)
{
if (((revents = pollfd_list.pollfds[ci].revents) == 0) ||
(pollfd_list.pollfds[ci].fd) == -1)
continue;
fd = pollfd_list.pollfds[ci].fd;
F = &fd_table[fd];
if (revents & (POLLRDNORM | POLLIN | POLLHUP | POLLERR))
{
callbacks_called++;
hdl = F->read_handler;
F->read_handler = NULL;
poll_update_pollfds(fd, POLLIN, NULL);
if (hdl)
hdl(fd, F->read_data);
}
if (revents & (POLLWRNORM | POLLOUT | POLLHUP | POLLERR))
{
callbacks_called++;
hdl = F->write_handler;
F->write_handler = NULL;
poll_update_pollfds(fd, POLLOUT, NULL);
if (hdl)
hdl(fd, F->write_data);
}
}
mask_our_signal(sigio_signal);
return 0;
}
/* void comm_select(unsigned long delay)
* Input: The maximum time to delay.
* Output: None
* Side-effects: Deregisters future interest in IO and calls the handlers
* if an event occurs for an FD.
* Comments: Check all connections for new connections and input data
* that is to be processed. Also check for connections with data queued
* and whether we can write it out.
* Called to do the new-style IO, courtesy of squid (like most of this
* new IO code). This routine handles the stuff we've hidden in
* comm_setselect and fd_table[] and calls callbacks for IO ready
* events.
*/
void
comm_select(unsigned long delay)
{
int revents = 0, sig, fd;
PF *hdl;
fde_t *F;
struct siginfo si;
struct timespec timeout;
timeout.tv_sec = 0;
timeout.tv_nsec = 1000000 * delay;
sig = sigtimedwait(&our_sigset, &si, &timeout);
set_time();
if (sig != SIGIO)
{
if (sig > 0)
{
fd = si.si_fd;
pollfd_list.pollfds[fd].revents |= si.si_band;
revents = pollfd_list.pollfds[fd].revents;
F = &fd_table[fd];
if (revents & (POLLRDNORM | POLLIN | POLLHUP | POLLERR))
{
hdl = F->read_handler;
F->read_handler = NULL;
poll_update_pollfds(fd, POLLIN, NULL);
if (hdl)
hdl(fd, F->read_data);
}
if (revents & (POLLWRNORM | POLLOUT | POLLHUP | POLLERR))
{
hdl = F->write_handler;
F->write_handler = NULL;
poll_update_pollfds(fd, POLLOUT, NULL);
if (hdl)
hdl(fd, F->write_data);
}
}
return;
}
/* RT signal queue overflowed.. */
if (CurrentTime - last_rtsigqo_warning >= 30)
{
ilog(L_WARN, "Kernel RT Signal queue overflowed. "
"Is /proc/sys/kernel/rtsig-max too small?");
last_rtsigqo_warning = CurrentTime;
}
signal(SIGIO_SIGNAL, SIG_IGN);
signal(SIGIO_SIGNAL, SIG_DFL);
/* ..try polling instead */
{
int num, ci;
while ((num = poll(pollfd_list.pollfds, pollfd_list.maxindex + 1, 0)) < 0
&& ignoreErrno(errno))
;
/* update current time again, eww.. */
set_time();
if (num > 0)
{
/* XXX we *could* optimise by falling out after doing num fds ... */
for (ci = 0; ci < pollfd_list.maxindex + 1; ci++)
{
if (((revents = pollfd_list.pollfds[ci].revents) == 0) ||
(pollfd_list.pollfds[ci].fd) == -1)
continue;
fd = pollfd_list.pollfds[ci].fd;
F = &fd_table[fd];
if (revents & (POLLRDNORM | POLLIN | POLLHUP | POLLERR))
{
hdl = F->read_handler;
F->read_handler = NULL;
poll_update_pollfds(fd, POLLIN, NULL);
if (hdl)
hdl(fd, F->read_data);
}
if (revents & (POLLWRNORM | POLLOUT | POLLHUP | POLLERR))
{
hdl = F->write_handler;
F->write_handler = NULL;
poll_update_pollfds(fd, POLLOUT, NULL);
if (hdl)
hdl(fd, F->write_data);
}
}
}
}
mask_our_signal(SIGIO_SIGNAL);
}
