use bytes;
use POSIX ();
use IO::Handle qw();
-use Fcntl qw(FD_CLOEXEC F_SETFD F_GETFD SEEK_SET);
+use Fcntl qw(SEEK_SET :DEFAULT);
use Time::HiRes qw(clock_gettime CLOCK_MONOTONIC);
use parent qw(Exporter);
-our @EXPORT_OK = qw(now msg_more write_in_full);
+our @EXPORT_OK = qw(now msg_more);
use warnings;
+use 5.010_001;
use PublicInbox::Syscall qw(:epoll);
'wbuf_off', # offset into first element of wbuf to start writing at
);
-use Errno qw(EAGAIN EINVAL);
-use Carp qw(croak confess);
-use File::Temp qw(tempfile);
-
-our $HAVE_KQUEUE = eval { require IO::KQueue; IO::KQueue->import; 1 };
+use Errno qw(EAGAIN EINVAL EEXIST);
+use Carp qw(croak confess carp);
+require File::Spec;
our (
- $HaveEpoll, # Flag -- is epoll available? initially undefined.
- $HaveKQueue,
%DescriptorMap, # fd (num) -> PublicInbox::DS object
- $Epoll, # Global epoll fd (for epoll mode only)
- $KQueue, # Global kqueue fd ref (for kqueue mode only)
+ $Epoll, # Global epoll fd (or DSKQXS ref)
$_io, # IO::Handle for Epoll
@ToClose, # sockets to close when event loop is done
$PostLoopCallback = undef;
$DoneInit = 0;
- # NOTE kqueue is close-on-fork, and we don't account for it, yet
- # OTOH, we (public-inbox) don't need this sub outside of tests...
- POSIX::close($$KQueue) if !$_io && $KQueue && $$KQueue >= 0;
- $KQueue = undef;
-
- $_io = undef; # close $Epoll
- $Epoll = undef;
+ $_io = undef; # closes real $Epoll FD
+ $Epoll = undef; # may call DSKQXS::DESTROY
*EventLoop = *FirstTimeEventLoop;
}
return if $DoneInit;
$DoneInit = 1;
- if ($HAVE_KQUEUE) {
- $KQueue = IO::KQueue->new();
- $HaveKQueue = defined $KQueue;
- if ($HaveKQueue) {
- *EventLoop = *KQueueEventLoop;
- }
- }
- elsif (PublicInbox::Syscall::epoll_defined()) {
- $Epoll = eval { epoll_create(1024); };
- $HaveEpoll = defined $Epoll && $Epoll >= 0;
- if ($HaveEpoll) {
- set_cloexec($Epoll);
- *EventLoop = *EpollEventLoop;
+ if (PublicInbox::Syscall::epoll_defined()) {
+ $Epoll = epoll_create();
+ set_cloexec($Epoll) if (defined($Epoll) && $Epoll >= 0);
+ } else {
+ my $cls;
+ for (qw(DSKQXS DSPoll)) {
+ $cls = "PublicInbox::$_";
+ last if eval "require $cls";
}
+ $cls->import;
+ $Epoll = $cls->new;
}
+ *EventLoop = *EpollEventLoop;
}
=head2 C<< CLASS->EventLoop() >>
_InitPoller();
- if ($HaveEpoll) {
- EpollEventLoop($class);
- } elsif ($HaveKQueue) {
- KQueueEventLoop($class);
- }
+ EventLoop($class);
}
sub now () { clock_gettime(CLOCK_MONOTONIC) }
return $timeout;
}
-### The epoll-based event loop. Gets installed as EventLoop if IO::Epoll loads
-### okay.
sub EpollEventLoop {
- my $class = shift;
-
while (1) {
my @events;
my $i;
}
return unless PostEventLoop();
}
- exit 0;
-}
-
-### The kqueue-based event loop. Gets installed as EventLoop if IO::KQueue works
-### okay.
-sub KQueueEventLoop {
- my $class = shift;
-
- while (1) {
- my $timeout = RunTimers();
- my @ret = eval { $KQueue->kevent($timeout) };
- if (my $err = $@) {
- # workaround https://rt.cpan.org/Ticket/Display.html?id=116615
- if ($err =~ /Interrupted system call/) {
- @ret = ();
- } else {
- die $err;
- }
- }
-
- foreach my $kev (@ret) {
- $DescriptorMap{$kev->[0]}->event_step;
- }
- return unless PostEventLoop();
- }
-
- exit(0);
}
=head2 C<< CLASS->SetPostLoopCallback( CODEREF ) >>
while (my $sock = shift @ToClose) {
my $fd = fileno($sock);
- # close the socket. (not a PublicInbox::DS close)
- $sock->close;
+ # close the socket. (not a PublicInbox::DS close)
+ CORE::close($sock);
# and now we can finally remove the fd from the map. see
# comment above in ->close.
return $keep_running;
}
-# map EPOLL* bits to kqueue EV_* flags for EV_SET
-sub kq_flag ($$) {
- my ($bit, $ev) = @_;
- if ($ev & $bit) {
- my $fl = EV_ADD() | EV_ENABLE();
- ($ev & EPOLLONESHOT) ? ($fl|EV_ONESHOT()) : $fl;
- } else {
- EV_DISABLE();
- }
-}
-
#####################################################################
### PublicInbox::DS-the-object code
#####################################################################
_InitPoller();
- if ($HaveEpoll) {
-retry:
- if (epoll_ctl($Epoll, EPOLL_CTL_ADD, $fd, $ev)) {
- if ($! == EINVAL && ($ev & EPOLLEXCLUSIVE)) {
- $ev &= ~EPOLLEXCLUSIVE;
- goto retry;
- }
- die "couldn't add epoll watch for $fd: $!\n";
+ if (epoll_ctl($Epoll, EPOLL_CTL_ADD, $fd, $ev)) {
+ if ($! == EINVAL && ($ev & EPOLLEXCLUSIVE)) {
+ $ev &= ~EPOLLEXCLUSIVE;
+ goto retry;
}
+ die "couldn't add epoll watch for $fd: $!\n";
}
- elsif ($HaveKQueue) {
- $KQueue->EV_SET($fd, EVFILT_READ(), EV_ADD() | kq_flag(EPOLLIN, $ev));
- $KQueue->EV_SET($fd, EVFILT_WRITE(), EV_ADD() | kq_flag(EPOLLOUT, $ev));
- }
-
Carp::cluck("PublicInbox::DS::new blowing away existing descriptor map for fd=$fd ($DescriptorMap{$fd})")
if $DescriptorMap{$fd};
# if we're using epoll, we have to remove this from our epoll fd so we stop getting
# notifications about it
- if ($HaveEpoll) {
- my $fd = fileno($sock);
- epoll_ctl($Epoll, EPOLL_CTL_DEL, $fd, 0) and
- confess("EPOLL_CTL_DEL: $!");
- }
+ my $fd = fileno($sock);
+ epoll_ctl($Epoll, EPOLL_CTL_DEL, $fd, 0) and
+ confess("EPOLL_CTL_DEL: $!");
# we explicitly don't delete from DescriptorMap here until we
# actually close the socket, as we might be in the middle of
sub psendfile ($$$) {
my ($sock, $fh, $off) = @_;
- sysseek($fh, $$off, SEEK_SET) or return;
- defined(my $to_write = sysread($fh, my $buf, 16384)) or return;
+ seek($fh, $$off, SEEK_SET) or return;
+ defined(my $to_write = read($fh, my $buf, 16384)) or return;
my $written = 0;
while ($to_write > 0) {
if (defined(my $w = syswrite($sock, $buf, $to_write, $written))) {
sub flush_write ($) {
my ($self) = @_;
my $wbuf = $self->{wbuf} or return 1;
- my $sock = $self->{sock} or return 1;
+ my $sock = $self->{sock};
next_buf:
while (my $bref = $wbuf->[0]) {
if (ref($bref) ne 'CODE') {
my $off = delete($self->{wbuf_off}) // 0;
- while (1) {
+ while ($sock) {
my $w = psendfile($sock, $bref, \$off);
if (defined $w) {
if ($w == 0) {
}
} else { #($ref eq 'CODE') {
shift @$wbuf;
- $bref->();
+ my $before = scalar(@$wbuf);
+ $bref->($self);
+
+ # bref may be enqueueing more CODE to call (see accept_tls_step)
+ return 0 if (scalar(@$wbuf) > $before);
}
} # while @$wbuf
1; # all done
}
-sub write_in_full ($$$$) {
- my ($fh, $bref, $len, $off) = @_;
- my $rv = 0;
- while ($len > 0) {
- my $w = syswrite($fh, $$bref, $len, $off);
- return ($rv ? $rv : $w) unless $w; # undef or 0
- $rv += $w;
- $len -= $w;
- $off += $w;
+sub do_read ($$$$) {
+ my ($self, $rbuf, $len, $off) = @_;
+ my $r = sysread($self->{sock}, $$rbuf, $len, $off);
+ return ($r == 0 ? $self->close : $r) if defined $r;
+ # common for clients to break connections without warning,
+ # would be too noisy to log here:
+ if (ref($self) eq 'IO::Socket::SSL') {
+ my $ev = PublicInbox::TLS::epollbit() or return $self->close;
+ watch($self, $ev | EPOLLONESHOT);
+ } elsif ($! == EAGAIN) {
+ watch($self, EPOLLIN | EPOLLONESHOT);
+ } else {
+ $self->close;
}
- $rv
}
-sub tmpbuf ($$) {
- my ($bref, $off) = @_;
- # open(my $fh, '+>>', undef) doesn't set O_APPEND
- my ($fh, $path) = tempfile('wbuf-XXXXXXX', TMPDIR => 1);
- open $fh, '+>>', $path or die "open: $!";
- unlink $path;
- my $to_write = bytes::length($$bref) - $off;
- my $w = write_in_full($fh, $bref, $to_write, $off);
- die "write_in_full ($to_write): $!" unless defined $w;
- $w == $to_write ? $fh : die("short write $w < $to_write");
+# drop the socket if we hit unrecoverable errors on our system which
+# require BOFH attention: ENOSPC, EFBIG, EIO, EMFILE, ENFILE...
+sub drop {
+ my $self = shift;
+ carp(@_);
+ $self->close;
+}
+
+# n.b.: use ->write/->read for this buffer to allow compatibility with
+# PerlIO::mmap or PerlIO::scalar if needed
+sub tmpio ($$$) {
+ my ($self, $bref, $off) = @_;
+ my $fh; # open(my $fh, '+>>', undef) doesn't set O_APPEND
+ do {
+ my $fn = File::Spec->tmpdir . '/wbuf-' . rand;
+ if (sysopen($fh, $fn, O_RDWR|O_CREAT|O_EXCL|O_APPEND, 0600)) { # likely
+ unlink($fn) or return drop($self, "unlink($fn) $!");
+ } elsif ($! != EEXIST) { # EMFILE/ENFILE/ENOSPC/ENOMEM
+ return drop($self, "open: $!");
+ }
+ } until (defined $fh);
+ $fh->autoflush(1);
+ my $len = bytes::length($$bref) - $off;
+ $fh->write($$bref, $len, $off) or return drop($self, "write ($len): $!");
+ $fh
}
=head2 C<< $obj->write( $data ) >>
my $sock = $self->{sock} or return 1;
my $ref = ref $data;
my $bref = $ref ? $data : \$data;
- if (my $wbuf = $self->{wbuf}) { # already buffering, can't write more...
+ my $wbuf = $self->{wbuf};
+ if ($wbuf && scalar(@$wbuf)) { # already buffering, can't write more...
if ($ref eq 'CODE') {
push @$wbuf, $bref;
} else {
my $last = $wbuf->[-1];
if (ref($last) eq 'GLOB') { # append to tmp file buffer
- write_in_full($last, $bref, bytes::length($$bref), 0);
+ $last->print($$bref) or return drop($self, "print: $!");
} else {
- push @$wbuf, tmpbuf($bref, 0);
+ my $tmpio = tmpio($self, $bref, 0) or return 0;
+ push @$wbuf, $tmpio;
}
}
return 0;
} elsif ($ref eq 'CODE') {
- $bref->();
+ $bref->($self);
return 1;
} else {
my $to_write = bytes::length($$bref);
} else {
return $self->close;
}
- $self->{wbuf} = [ tmpbuf($bref, $written) ];
+ my $tmpio = tmpio($self, $bref, $written) or return 0;
+ $self->{wbuf} = [ $tmpio ];
watch($self, EPOLLOUT|EPOLLONESHOT);
return 0;
}
my $self = $_[0];
my $sock = $self->{sock} or return 1;
- if (MSG_MORE && !$self->{wbuf}) {
+ if (MSG_MORE && !$self->{wbuf} && ref($sock) ne 'IO::Socket::SSL') {
my $n = send($sock, $_[1], MSG_MORE);
if (defined $n) {
my $nlen = bytes::length($_[1]) - $n;
return 1 if $nlen == 0; # all done!
-
# queue up the unwritten substring:
- $self->{wbuf} = [ tmpbuf(\($_[1]), $n) ];
+ my $tmpio = tmpio($self, \($_[1]), $n) or return 0;
+ $self->{wbuf} = [ $tmpio ];
watch($self, EPOLLOUT|EPOLLONESHOT);
return 0;
}
sub watch ($$) {
my ($self, $ev) = @_;
my $sock = $self->{sock} or return;
- my $fd = fileno($sock);
- if ($HaveEpoll) {
- epoll_ctl($Epoll, EPOLL_CTL_MOD, $fd, $ev) and
- confess("EPOLL_CTL_MOD $!");
- } elsif ($HaveKQueue) {
- $KQueue->EV_SET($fd, EVFILT_READ(), kq_flag(EPOLLIN, $ev));
- $KQueue->EV_SET($fd, EVFILT_WRITE(), kq_flag(EPOLLOUT, $ev));
- }
+ epoll_ctl($Epoll, EPOLL_CTL_MOD, fileno($sock), $ev) and
+ confess("EPOLL_CTL_MOD $!");
+ 0;
}
sub watch_in1 ($) { watch($_[0], EPOLLIN | EPOLLONESHOT) }
+# return true if complete, false if incomplete (or failure)
+sub accept_tls_step ($) {
+ my ($self) = @_;
+ my $sock = $self->{sock} or return;
+ return 1 if $sock->accept_SSL;
+ return $self->close if $! != EAGAIN;
+ if (my $ev = PublicInbox::TLS::epollbit()) {
+ unshift @{$self->{wbuf} ||= []}, \&accept_tls_step;
+ return watch($self, $ev | EPOLLONESHOT);
+ }
+ drop($self, 'BUG? EAGAIN but '.PublicInbox::TLS::err());
+}
+
+sub shutdn_tls_step ($) {
+ my ($self) = @_;
+ my $sock = $self->{sock} or return;
+ return $self->close if $sock->stop_SSL(SSL_fast_shutdown => 1);
+ return $self->close if $! != EAGAIN;
+ if (my $ev = PublicInbox::TLS::epollbit()) {
+ unshift @{$self->{wbuf} ||= []}, \&shutdn_tls_step;
+ return watch($self, $ev | EPOLLONESHOT);
+ }
+ drop($self, 'BUG? EAGAIN but '.PublicInbox::TLS::err());
+}
+
+# don't bother with shutdown($sock, 2), we don't fork+exec w/o CLOEXEC
+# or fork w/o exec, so no inadvertant socket sharing
+sub shutdn ($) {
+ my ($self) = @_;
+ my $sock = $self->{sock} or return;
+ if (ref($sock) eq 'IO::Socket::SSL') {
+ shutdn_tls_step($self);
+ } else {
+ $self->close;
+ }
+}
+
package PublicInbox::DS::Timer;
# [$abs_float_firetime, $coderef];
sub cancel {