X-Git-Url: http://www.git.stargrave.org/?a=blobdiff_plain;f=lib%2FPublicInbox%2FInboxIdle.pm;h=2781b3e15bb96c290be28169009705a941662d08;hb=23af251dd607c4e75ab1e68063f2c885c48cc035;hp=84b6d26f98dfb28fd80dd2bfbca8a70d07e873d5;hpb=5e05c2eb58a450849f1826f3d02ed62b814b6617;p=public-inbox.git

diff --git a/lib/PublicInbox/InboxIdle.pm b/lib/PublicInbox/InboxIdle.pm
index 84b6d26f..2781b3e1 100644
--- a/lib/PublicInbox/InboxIdle.pm
+++ b/lib/PublicInbox/InboxIdle.pm
@@ -1,4 +1,4 @@
-# Copyright (C) 2020 all contributors <meta@public-inbox.org>
+# Copyright (C) 2020-2021 all contributors <meta@public-inbox.org>
 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
 
 # fields:
@@ -7,7 +7,7 @@
 package PublicInbox::InboxIdle;
 use strict;
 use parent qw(PublicInbox::DS);
-use PublicInbox::Syscall qw(EPOLLIN EPOLLET);
+use PublicInbox::Syscall qw(EPOLLIN);
 my $IN_MODIFY = 0x02; # match Linux inotify
 my $ino_cls;
 if ($^O eq 'linux' && eval { require Linux::Inotify2; 1 }) {
@@ -24,17 +24,26 @@ sub in2_arm ($$) { # PublicInbox::Config::each_inbox callback
 	my $dir = $ibx->{inboxdir};
 	my $inot = $self->{inot};
 	my $cur = $self->{pathmap}->{$dir} //= [];
+	my $lock = "$dir/".($ibx->version >= 2 ? 'inbox.lock' : 'ssoma.lock');
 
 	# transfer old subscriptions to the current inbox, cancel the old watch
-	if (my $old_ibx = $cur->[0]) {
+	my $old_ibx = $cur->[0];
+	$cur->[0] = $ibx;
+	if ($old_ibx) {
 		$ibx->{unlock_subs} and
 			die "BUG: $dir->{unlock_subs} should not exist";
 		$ibx->{unlock_subs} = $old_ibx->{unlock_subs};
+
+		# Linux::Inotify2::Watch::name matches if watches are the
+		# same, no point in replacing a watch of the same name
+		if ($cur->[1]->name eq $lock) {
+			$self->{on_unlock}->{$lock} = $ibx;
+			return;
+		}
+		# rare, name changed (v1 inbox converted to v2)
 		$cur->[1]->cancel; # Linux::Inotify2::Watch::cancel
 	}
-	$cur->[0] = $ibx;
 
-	my $lock = "$dir/".($ibx->version >= 2 ? 'inbox.lock' : 'ssoma.lock');
 	if (my $w = $cur->[1] = $inot->watch($lock, $IN_MODIFY)) {
 		$self->{on_unlock}->{$w->name} = $ibx;
 	} else {
@@ -54,6 +63,9 @@ sub refresh {
 	$pi_cfg->each_inbox(\&in2_arm, $self);
 }
 
+# internal API for ease-of-use
+sub watch_inbox { in2_arm($_[1], $_[0]) };
+
 sub new {
 	my ($class, $pi_cfg) = @_;
 	my $self = bless {}, $class;
@@ -61,7 +73,7 @@ sub new {
 	if ($ino_cls) {
 		$inot = $ino_cls->new or die "E: $ino_cls->new: $!";
 		my $io = PublicInbox::In2Tie::io($inot);
-		$self->SUPER::new($io, EPOLLIN | EPOLLET);
+		$self->SUPER::new($io, EPOLLIN);
 	} else {
 		require PublicInbox::FakeInotify;
 		$inot = PublicInbox::FakeInotify->new;
@@ -69,7 +81,7 @@ sub new {
 	$self->{inot} = $inot;
 	$self->{pathmap} = {}; # inboxdir => [ ibx, watch1, watch2, watch3...]
 	$self->{on_unlock} = {}; # lock path => ibx
-	refresh($self, $pi_cfg);
+	refresh($self, $pi_cfg) if $pi_cfg;
 	PublicInbox::FakeInotify::poll_once($self) if !$ino_cls;
 	$self;
 }
@@ -80,7 +92,8 @@ sub event_step {
 		my @events = $self->{inot}->read; # Linux::Inotify2::read
 		my $on_unlock = $self->{on_unlock};
 		for my $ev (@events) {
-			if (my $ibx = $on_unlock->{$ev->fullname}) {
+			my $fn = $ev->fullname // next; # cancelled
+			if (my $ibx = $on_unlock->{$fn}) {
 				$ibx->on_unlock;
 			}
 		}