From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 942F0C38A2A for ; Fri, 8 May 2020 11:01:56 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 4ED71208CA for ; Fri, 8 May 2020 11:01:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="iBrjeEQy" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4ED71208CA Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:57428 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jX0lP-0004vw-Hz for qemu-devel@archiver.kernel.org; Fri, 08 May 2020 07:01:55 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:54050) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jX0km-0004VE-3w for qemu-devel@nongnu.org; Fri, 08 May 2020 07:01:16 -0400 Received: from us-smtp-2.mimecast.com ([207.211.31.81]:57571 helo=us-smtp-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1jX0kk-0002kL-AA for qemu-devel@nongnu.org; Fri, 08 May 2020 07:01:15 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1588935672; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=HRLTazxR1tS4LNpLP1ps3/DHyVAQs0s9XAw2k9vItQY=; b=iBrjeEQyPAsP+T4eVFLP7YmT/VuctyVDd9NsSdfqlwCNDMehduyYS6X8nYtGCrEhkwm6jO ZDzT72UQKswddufQRR0WfNqHQYD6AoapOOnjqGekVvKziCKIlGnl+NMg+iqOITmQdYzfRR pq/A1iS24692a8BzQPAbn3OQcL4BvBU= Received: from mail-io1-f70.google.com (mail-io1-f70.google.com [209.85.166.70]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-19-rS_11SHiN0uu-9D-Xos7xg-1; Fri, 08 May 2020 07:01:03 -0400 X-MC-Unique: rS_11SHiN0uu-9D-Xos7xg-1 Received: by mail-io1-f70.google.com with SMTP id k1so1395824iov.18 for ; Fri, 08 May 2020 04:01:03 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=3OcsBVsB6NcoujPekpp5fmVJT3ojXt1NWH2peGtNHfg=; b=WsyMBJWVGsoeaJFruw0VHIldgafMDCRkrBYMnii/pNV3H0pp9qAwyzm50h3B2bS56g WjXYvg5e+izHDpYxyGBrfUIoEzLYvkRyqctYAQl2lA41BnLhTYdGGYSel1AtydrNNplq tgHMAuUA6KoiIyWmkOOUpRQaPnp2PEcWfcmrlPkcnnRjHcz80STBb5+KaI/BCZGwwqCO mEaTVJaYFu7tac5/e+0gX8KbyAEPtLx+FUT4oA2GGJb4XEfXpk0WsilCW492Lk+81H0h nRA3TW++Gx2vhs3HkilN9IYV2jfcyAKQnDIMOptaNl8gMr9K0kIBw6yAShgDGHIwz9iv zYMA== X-Gm-Message-State: AGi0PuaErEbh6iSzWQwCGnOudf5kFUQO0nvuytrSB1Kur1AWKLbCPZXa VbfpChx0G3+bKqo+77AzSKI54vlkiFwtiXoXMfil99D7HRoWNCIvg27Co60nwM1tLvolrBtcYcL j/lP4tw/I/AWwZ3gUByRjntDO61GwS6I= X-Received: by 2002:a05:6e02:c85:: with SMTP id b5mr2157055ile.165.1588935662504; Fri, 08 May 2020 04:01:02 -0700 (PDT) X-Google-Smtp-Source: APiQypL+JZmYug75QyPe8e4yLJLQoumub/vHAp5hT/d9YbM8cyXPKz8zxQ3r6ahIgrLLpyDrjQ1b6kF0U5XI1D5haNE= X-Received: by 2002:a05:6e02:c85:: with SMTP id b5mr2157022ile.165.1588935662165; Fri, 08 May 2020 04:01:02 -0700 (PDT) MIME-Version: 1.0 References: <20200428085122.1621-1-fengli@smartx.com> <20200508051441.8143-1-fengli@smartx.com> <20200508051441.8143-3-fengli@smartx.com> In-Reply-To: <20200508051441.8143-3-fengli@smartx.com> From: =?UTF-8?B?TWFyYy1BbmRyw6kgTHVyZWF1?= Date: Fri, 8 May 2020 13:00:50 +0200 Message-ID: Subject: Re: [PATCH v3 2/2] char-socket: initialize reconnect timer only when the timer doesn't start To: Li Feng X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=207.211.31.81; envelope-from=mlureau@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/08 01:34:54 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -10 X-Spam_score: -1.1 X-Spam_bar: - X-Spam_report: (-1.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FROM_EXCESS_BASE64=0.979, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Feng Li , Dima Stepanov , Kyle Zhang , "open list:All patches CC here" , Paolo Bonzini Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Fri, May 8, 2020 at 7:14 AM Li Feng wrote: > > When the disconnect event is triggered in the connecting stage, > the tcp_chr_disconnect_locked may be called twice. > > The first call: > #0 qemu_chr_socket_restart_timer (chr=3D0x55555582ee90) at chardev/c= har-socket.c:120 > #1 0x000055555558e38c in tcp_chr_disconnect_locked (chr=3D) at chardev/char-socket.c:490 > #2 0x000055555558e3cd in tcp_chr_disconnect (chr=3D0x55555582ee90) a= t chardev/char-socket.c:497 > #3 0x000055555558ea32 in tcp_chr_new_client (chr=3Dchr@entry=3D0x555= 55582ee90, sioc=3Dsioc@entry=3D0x55555582f0b0) at chardev/char-socket.c:892 > #4 0x000055555558eeb8 in qemu_chr_socket_connected (task=3D0x5555558= 2f300, opaque=3D) at chardev/char-socket.c:1090 > #5 0x0000555555574352 in qio_task_complete (task=3Dtask@entry=3D0x55= 555582f300) at io/task.c:196 > #6 0x00005555555745f4 in qio_task_thread_result (opaque=3D0x55555582= f300) at io/task.c:111 > #7 qio_task_wait_thread (task=3D0x55555582f300) at io/task.c:190 > #8 0x000055555558f17e in tcp_chr_wait_connected (chr=3D0x55555582ee9= 0, errp=3D0x555555802a08 ) at chardev/char-socket.c:1013 > #9 0x0000555555567cbd in char_socket_client_reconnect_test (opaque= =3D0x5555557fe020 ) at tests/test-char.c:1152 > The second call: > #0 0x00007ffff5ac3277 in raise () from /lib64/libc.so.6 > #1 0x00007ffff5ac4968 in abort () from /lib64/libc.so.6 > #2 0x00007ffff5abc096 in __assert_fail_base () from /lib64/libc.so.6 > #3 0x00007ffff5abc142 in __assert_fail () from /lib64/libc.so.6 > #4 0x000055555558d10a in qemu_chr_socket_restart_timer (chr=3D0x5555= 5582ee90) at chardev/char-socket.c:125 > #5 0x000055555558df0c in tcp_chr_disconnect_locked (chr=3D) at chardev/char-socket.c:490 > #6 0x000055555558df4d in tcp_chr_disconnect (chr=3D0x55555582ee90) a= t chardev/char-socket.c:497 > #7 0x000055555558e5b2 in tcp_chr_new_client (chr=3Dchr@entry=3D0x555= 55582ee90, sioc=3Dsioc@entry=3D0x55555582f0b0) at chardev/char-socket.c:892 > #8 0x000055555558e93a in tcp_chr_connect_client_sync (chr=3Dchr@entr= y=3D0x55555582ee90, errp=3Derrp@entry=3D0x7fffffffd178) at chardev/char-soc= ket.c:944 > #9 0x000055555558ec78 in tcp_chr_wait_connected (chr=3D0x55555582ee9= 0, errp=3D0x555555802a08 ) at chardev/char-socket.c:1035 > #10 0x000055555556804b in char_socket_client_test (opaque=3D0x5555557= fe020 ) at tests/test-char.c:1023 > > Run test/test-char to reproduce this issue. > > test-char: chardev/char-socket.c:125: qemu_chr_socket_restart_timer: Asse= rtion `!s->reconnect_timer' failed. > > Signed-off-by: Li Feng After applying your patch, with qemu configure --enable-debug --enable-sanitizers: $ tests/test-char Unexpected error in qio_channel_readv_all() at /home/elmarco/src/qq/io/channel.c:147: Unexpected end-of-file before all bytes were read [1] 2445287 abort (core dumped) tests/test-char > --- > chardev/char-socket.c | 2 +- > tests/test-char.c | 68 ++++++++++++++++++++++++++++++++++++++++-----= ------ > 2 files changed, 55 insertions(+), 15 deletions(-) > > diff --git a/chardev/char-socket.c b/chardev/char-socket.c > index 1f14c2c7c8..d84330b3c9 100644 > --- a/chardev/char-socket.c > +++ b/chardev/char-socket.c > @@ -486,7 +486,7 @@ static void tcp_chr_disconnect_locked(Chardev *chr) > if (emit_close) { > qemu_chr_be_event(chr, CHR_EVENT_CLOSED); > } > - if (s->reconnect_time) { > + if (s->reconnect_time && !s->reconnect_timer) { > qemu_chr_socket_restart_timer(chr); > } > } > diff --git a/tests/test-char.c b/tests/test-char.c > index 8d39bdc9fa..d5c9049eec 100644 > --- a/tests/test-char.c > +++ b/tests/test-char.c > @@ -625,12 +625,14 @@ static void char_udp_test(void) > typedef struct { > int event; > bool got_pong; > + CharBackend *be; > } CharSocketTestData; > > > #define SOCKET_PING "Hello" > #define SOCKET_PONG "World" > > +typedef void (*char_socket_cb)(void *opaque, QEMUChrEvent event); > > static void > char_socket_event(void *opaque, QEMUChrEvent event) > @@ -639,6 +641,27 @@ char_socket_event(void *opaque, QEMUChrEvent event) > data->event =3D event; > } > > +static void > +char_socket_event_with_error(void *opaque, QEMUChrEvent event) > +{ > + static bool first_error; > + CharSocketTestData *data =3D opaque; > + CharBackend *be =3D data->be; > + data->event =3D event; > + switch (event) { > + case CHR_EVENT_OPENED: > + if (!first_error) { > + first_error =3D true; > + qemu_chr_fe_disconnect(be); > + } > + return; > + case CHR_EVENT_CLOSED: > + return; > + default: > + return; > + } > +} > + > > static void > char_socket_read(void *opaque, const uint8_t *buf, int size) > @@ -699,19 +722,24 @@ char_socket_addr_to_opt_str(SocketAddress *addr, bo= ol fd_pass, > } > > > -static void > +static int > char_socket_ping_pong(QIOChannel *ioc) > { > char greeting[sizeof(SOCKET_PING)]; > const char *response =3D SOCKET_PONG; > > - qio_channel_read_all(ioc, greeting, sizeof(greeting), &error_abort); > + int ret; > + ret =3D qio_channel_read_all(ioc, greeting, sizeof(greeting), &error= _abort); > + if (ret !=3D 0) { > + object_unref(OBJECT(ioc)); > + return -1; > + } > > g_assert(memcmp(greeting, SOCKET_PING, sizeof(greeting)) =3D=3D 0); > > qio_channel_write_all(ioc, response, sizeof(SOCKET_PONG), &error_abo= rt); > - > object_unref(OBJECT(ioc)); > + return 0; > } > > > @@ -783,6 +811,7 @@ static void char_socket_server_test(gconstpointer opa= que) > > reconnect: > data.event =3D -1; > + data.be =3D &be; > qemu_chr_fe_set_handlers(&be, NULL, NULL, > char_socket_event, NULL, > &data, NULL, true); > @@ -855,10 +884,13 @@ char_socket_client_server_thread(gpointer data) > QIOChannelSocket *ioc =3D data; > QIOChannelSocket *cioc; > > +retry: > cioc =3D qio_channel_socket_accept(ioc, &error_abort); > g_assert_nonnull(cioc); > > - char_socket_ping_pong(QIO_CHANNEL(cioc)); > + if (char_socket_ping_pong(QIO_CHANNEL(cioc)) !=3D 0) { > + goto retry; > + } > > return NULL; > } > @@ -869,6 +901,7 @@ typedef struct { > const char *reconnect; > bool wait_connected; > bool fd_pass; > + char_socket_cb event_cb; > } CharSocketClientTestConfig; > > static void char_socket_client_dupid_test(gconstpointer opaque) > @@ -920,6 +953,7 @@ static void char_socket_client_dupid_test(gconstpoint= er opaque) > static void char_socket_client_test(gconstpointer opaque) > { > const CharSocketClientTestConfig *config =3D opaque; > + const char_socket_cb event_cb =3D config->event_cb; > QIOChannelSocket *ioc; > char *optstr; > Chardev *chr; > @@ -983,8 +1017,9 @@ static void char_socket_client_test(gconstpointer op= aque) > > reconnect: > data.event =3D -1; > + data.be =3D &be; > qemu_chr_fe_set_handlers(&be, NULL, NULL, > - char_socket_event, NULL, > + event_cb, NULL, > &data, NULL, true); > if (config->reconnect) { > g_assert(data.event =3D=3D -1); > @@ -1022,7 +1057,7 @@ static void char_socket_client_test(gconstpointer o= paque) > /* Setup a callback to receive the reply to our greeting */ > qemu_chr_fe_set_handlers(&be, char_socket_can_read, > char_socket_read, > - char_socket_event, NULL, > + event_cb, NULL, > &data, NULL, true); > g_assert(data.event =3D=3D CHR_EVENT_OPENED); > data.event =3D -1; > @@ -1467,19 +1502,22 @@ int main(int argc, char **argv) > > #define SOCKET_CLIENT_TEST(name, addr) = \ > static CharSocketClientTestConfig client1 ## name =3D = \ > - { addr, NULL, false, false }; = \ > + { addr, NULL, false, false, char_socket_event}; = \ > static CharSocketClientTestConfig client2 ## name =3D = \ > - { addr, NULL, true, false }; = \ > + { addr, NULL, true, false, char_socket_event }; = \ > static CharSocketClientTestConfig client3 ## name =3D = \ > - { addr, ",reconnect=3D1", false }; = \ > + { addr, ",reconnect=3D1", false, false, char_socket_event }; = \ > static CharSocketClientTestConfig client4 ## name =3D = \ > - { addr, ",reconnect=3D1", true }; = \ > + { addr, ",reconnect=3D1", true, false, char_socket_event }; = \ > static CharSocketClientTestConfig client5 ## name =3D = \ > - { addr, NULL, false, true }; = \ > + { addr, NULL, false, true, char_socket_event }; = \ > static CharSocketClientTestConfig client6 ## name =3D = \ > - { addr, NULL, true, true }; = \ > + { addr, NULL, true, true, char_socket_event }; = \ > static CharSocketClientTestConfig client7 ## name =3D = \ > - { addr, ",reconnect=3D1", false, false }; = \ > + { addr, ",reconnect=3D1", false, false, char_socket_event }; = \ > + static CharSocketClientTestConfig client8 ## name =3D = \ > + { addr, ",reconnect=3D1", true, false, = \ > + char_socket_event_with_error }; = \ > g_test_add_data_func("/char/socket/client/mainloop/" # name, = \ > &client1 ##name, char_socket_client_test); = \ > g_test_add_data_func("/char/socket/client/wait-conn/" # name, = \ > @@ -1493,7 +1531,9 @@ int main(int argc, char **argv) > g_test_add_data_func("/char/socket/client/wait-conn-fdpass/" # name,= \ > &client6 ##name, char_socket_client_test); = \ > g_test_add_data_func("/char/socket/client/dupid-reconnect/" # name, = \ > - &client7 ##name, char_socket_client_dupid_test) > + &client7 ##name, char_socket_client_dupid_test)= ;\ > + g_test_add_data_func("/char/socket/client/reconnect-error/" # name, = \ > + &client8 ##name, char_socket_client_test) > > if (has_ipv4) { > SOCKET_SERVER_TEST(tcp, &tcpaddr); > -- > 2.11.0 >