Tests: add HTTP3 BPF reload test.

h3_bpf.t

@@ -0,0 +1,210 @@
+#!/usr/bin/perl
+
+# (C) Nginx, Inc.
+
+# Tests for HTTP/3 with quic_bpf.
+
+###############################################################################
+
+use warnings;
+use strict;
+
+use Test::More;
+
+BEGIN { use FindBin; chdir($FindBin::Bin); }
+
+use lib 'lib';
+use Test::Nginx;
+use Test::Nginx::HTTP3;
+
+###############################################################################
+
+select STDERR; $| = 1;
+select STDOUT; $| = 1;
+
+plan(skip_all => 'must be root') if $> != 0;
+
+my $t = Test::Nginx->new()->has(qw/http http_v3 cryptx/)
+	->has_daemon('openssl')->write_file_expand('nginx.conf', <<'EOF');
+
+%%TEST_GLOBALS%%
+
+daemon off;
+
+worker_processes 2;
+
+events {
+}
+
+quic_bpf on;
+
+http {
+    %%TEST_GLOBALS_HTTP%%
+
+    ssl_certificate_key localhost.key;
+    ssl_certificate localhost.crt;
+
+    server {
+        listen       127.0.0.1:%%PORT_8980_UDP%% quic reuseport;
+        server_name  localhost;
+
+        location / {
+            return 200 $pid;
+        }
+    }
+
+    server {
+        listen       %%PORT_8981_UDP%% quic reuseport;
+        server_name  localhost;
+
+        location / {
+            return 200 $pid;
+        }
+    }
+
+    server {
+        listen       127.0.0.1:%%PORT_8982_UDP%% quic;
+        server_name  localhost;
+
+        location / {
+            return 200 $pid;
+        }
+    }
+}
+
+EOF
+
+$t->write_file('openssl.conf', <<EOF);
+[ req ]
+default_bits = 2048
+encrypt_key = no
+distinguished_name = req_distinguished_name
+[ req_distinguished_name ]
+EOF
+
+my $d = $t->testdir();
+
+foreach my $name ('localhost') {
+	system('openssl req -x509 -new '
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
+		. ">>$d/openssl.out 2>&1") == 0
+		or die "Can't create certificate for $name: $!\n";
+}
+
+$t->try_run('no quic_bpf')->plan(10);
+
+###############################################################################
+
+like(get(8980), qr/^\d+$/, 'reuseport group');
+like(get(8981), qr/^\d+$/, 'wildcard group');
+
+# requests started before the reload are finished after it, so the finishing
+# packets carry connection id and have to be routed to the old worker
+# through the connections map
+
+my $s = Test::Nginx::HTTP3->new();
+my @sid = map { start($s) } (1 .. 10);
+
+reload($t, 2);
+
+my (%pid, $ok);
+
+for my $sid (@sid) {
+	my $body = finish($s, $sid);
+	next unless defined $body;
+
+	$ok++;
+	$pid{$body} = 1;
+}
+
+is($ok, 10, 'established connection after reload');
+is(scalar keys %pid, 1, 'established connection, same worker');
+
+# new connections must reach the new workers
+
+my @new = map { get(8980) } (1 .. 5);
+
+is(scalar(grep { defined && /^\d+$/ } @new), 5,
+	'new connections after reload');
+is(scalar(grep { defined && exists $pid{$_} } @new), 0,
+	'new connections, new workers');
+
+like(get(8981), qr/^\d+$/, 'wildcard group after reload');
+
+# quic_bpf cannot be changed on reload
+
+my $conf = $t->read_file('nginx.conf');
+$conf =~ s/quic_bpf on;/quic_bpf off;/;
+$t->write_file('nginx.conf', $conf);
+
+reload($t, 2);
+
+like($t->read_file('error.log'), qr/cannot change "quic_bpf" after reload/,
+	'quic_bpf change on reload');
+like(get(8980), qr/^\d+$/, 'request after quic_bpf change');
+
+# listener w/o bpf group
+
+$t->stop();
+
+$conf =~ s/quic_bpf off;/quic_bpf on;/;
+$conf =~ s/worker_processes 2;/worker_processes 1;/;
+$t->write_file('nginx.conf', $conf);
+
+$t->run();
+
+like(get(8982), qr/^\d+$/, 'no bpf group');
+
+###############################################################################
+
+sub start {
+	my ($s) = @_;
+
+	return $s->new_stream({ body_more => 1, headers => [
+		{ name => ':method', value => 'GET' },
+		{ name => ':scheme', value => 'https' },
+		{ name => ':path', value => '/' },
+		{ name => ':authority', value => 'localhost' }]});
+}
+
+sub finish {
+	my ($s, $sid) = @_;
+
+	$s->h3_body('', $sid, {});
+
+	my $frames = $s->read(all => [{ sid => $sid, fin => 1 }]);
+	my ($frame) = grep { $_->{type} eq 'DATA' } @$frames;
+
+	return $frame ? $frame->{data} : undef;
+}
+
+sub get {
+	my ($port) = @_;
+
+	my $s = Test::Nginx::HTTP3->new($port);
+	return undef unless defined $s;
+
+	my $sid = $s->new_stream();
+
+	my $frames = $s->read(all => [{ sid => $sid, fin => 1 }]);
+	my ($frame) = grep { $_->{type} eq 'DATA' } @$frames;
+
+	return $frame ? $frame->{data} : undef;
+}
+
+sub reload {
+	my ($t, $workers) = @_;
+
+	my @m = $t->read_file('error.log') =~ /gracefully shutting down/g;
+
+	$t->reload();
+
+	for (1 .. 50) {
+		my @n = $t->read_file('error.log') =~ /gracefully shutting down/g;
+		last if @n >= @m + $workers;
+		select undef, undef, undef, 0.1;
+	}
+}
+
+###############################################################################