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Re: [PATCH v2] char-socket: initialize reconnect timer only when the tim
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From: |
Feng Li |
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Subject: |
Re: [PATCH v2] char-socket: initialize reconnect timer only when the timer doesn't start |
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Date: |
Tue, 28 Apr 2020 22:09:48 +0800 |
Apply the above patch, then `make check-unit`
or
`tests/test-char -p /char/socket/client/reconnect-error/unix`
Marc-André Lureau <address@hidden> 于2020年4月28日周二 下午7:06写道：
>
> Hi
>
> On Tue, Apr 28, 2020 at 10:59 AM Li Feng <address@hidden> wrote:
> >
> > Sorry for sending the weird same mail out.
> > Ignore the second one.
> >
> > Hi Lureau,
> >
> > I found another issue when running my new test: tests/test-char -p
> > /char/socket/client/reconnect-error/unix
> > The backtrace like this:
> > #0 0x00007ffff5ac3277 in raise () from /lib64/libc.so.6
> > #1 0x00007ffff5ac4968 in abort () from /lib64/libc.so.6
> > #2 0x00005555555aaa34 in error_handle_fatal (errp=<optimized out>,
> > err=0x7fffec0012d0) at util/error.c:40
> > #3 0x00005555555aab0d in error_setv (errp=0x555555802a08
> > <error_abort>, src=0x5555555c4220 "io/channel.c", line=148,
> > func=0x5555555c4520 <__func__.17450> "qio_channel_readv_all",
> > err_class=ERROR_CLASS_GENERIC_ERROR, fmt=<optimized out>,
> > ap=0x7ffff423bb10, suffix=0x0) at util/error.c:73
> > #4 0x00005555555aac90 in error_setg_internal
> > (errp=errp@entry=0x555555802a08 <error_abort>,
> > src=src@entry=0x5555555c4220 "io/channel.c", line=line@entry=148,
> > func=func@entry=0x5555555c4520 <__func__.17450>
> > "qio_channel_readv_all", fmt=fmt@entry=0x5555555c4340 "Unexpected
> > end-of-file before all bytes were read") at util/error.c:97
> > #5 0x000055555556c1fc in qio_channel_readv_all (ioc=<optimized out>,
> > iov=<optimized out>, niov=<optimized out>, errp=0x555555802a08
> > <error_abort>) at io/channel.c:147
> > #6 0x000055555556c23a in qio_channel_read_all (ioc=<optimized out>,
> > buf=<optimized out>, buflen=<optimized out>, errp=<optimized out>) at
> > io/channel.c:247
> > #7 0x000055555556ad0e in char_socket_ping_pong (ioc=0x7fffec0008c0)
> > at tests/test-char.c:727
> > #8 0x000055555556adcf in char_socket_client_server_thread
> > (data=data@entry=0x55555582e350) at tests/test-char.c:881
> > #9 0x00005555555a9556 in qemu_thread_start (args=<optimized out>) at
> > util/qemu-thread-posix.c:519
> > #10 0x00007ffff5e61e25 in start_thread () from /lib64/libpthread.so.0
> > #11 0x00007ffff5b8bbad in clone () from /lib64/libc.so.6
> >
> > I think this is a new issue of qemu, not my test issue.
> > How do you think?
>
>
> No idea, it could be a bug in the test itself. How did you produce it?
>
> >
> > Thanks,
> >
> > Feng Li
> >
> > Li Feng <address@hidden> 于2020年4月28日周二 下午4:53写道：
> >
> > >
> > > 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=0x55555582ee90) at
> > > chardev/char-socket.c:120
> > > #1 0x000055555558e38c in tcp_chr_disconnect_locked (chr=<optimized
> > > out>) at chardev/char-socket.c:490
> > > #2 0x000055555558e3cd in tcp_chr_disconnect (chr=0x55555582ee90) at
> > > chardev/char-socket.c:497
> > > #3 0x000055555558ea32 in tcp_chr_new_client
> > > (chr=chr@entry=0x55555582ee90, sioc=sioc@entry=0x55555582f0b0) at
> > > chardev/char-socket.c:892
> > > #4 0x000055555558eeb8 in qemu_chr_socket_connected
> > > (task=0x55555582f300, opaque=<optimized out>) at
> > > chardev/char-socket.c:1090
> > > #5 0x0000555555574352 in qio_task_complete
> > > (task=task@entry=0x55555582f300) at io/task.c:196
> > > #6 0x00005555555745f4 in qio_task_thread_result
> > > (opaque=0x55555582f300) at io/task.c:111
> > > #7 qio_task_wait_thread (task=0x55555582f300) at io/task.c:190
> > > #8 0x000055555558f17e in tcp_chr_wait_connected (chr=0x55555582ee90,
> > > errp=0x555555802a08 <error_abort>) at chardev/char-socket.c:1013
> > > #9 0x0000555555567cbd in char_socket_client_reconnect_test
> > > (opaque=0x5555557fe020 <client8unix>) 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=0x55555582ee90) at chardev/char-socket.c:125
> > > #5 0x000055555558df0c in tcp_chr_disconnect_locked (chr=<optimized
> > > out>) at chardev/char-socket.c:490
> > > #6 0x000055555558df4d in tcp_chr_disconnect (chr=0x55555582ee90) at
> > > chardev/char-socket.c:497
> > > #7 0x000055555558e5b2 in tcp_chr_new_client
> > > (chr=chr@entry=0x55555582ee90, sioc=sioc@entry=0x55555582f0b0) at
> > > chardev/char-socket.c:892
> > > #8 0x000055555558e93a in tcp_chr_connect_client_sync
> > > (chr=chr@entry=0x55555582ee90, errp=errp@entry=0x7fffffffd178) at
> > > chardev/char-socket.c:944
> > > #9 0x000055555558ec78 in tcp_chr_wait_connected (chr=0x55555582ee90,
> > > errp=0x555555802a08 <error_abort>) at chardev/char-socket.c:1035
> > > #10 0x000055555556804b in char_socket_client_test
> > > (opaque=0x5555557fe020 <client8unix>) 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:
> > > Assertion `!s->reconnect_timer' failed.
> > >
> > > Signed-off-by: Li Feng <address@hidden>
> > > ---
> > > v2:
> > > - Rewrite the solution.
> > > - Add test to reproduce this issue.
> > >
> > > chardev/char-socket.c | 2 +-
> > > tests/test-char.c | 48
> > > ++++++++++++++++++++++++++++++++++++++----------
> > > 2 files changed, 39 insertions(+), 11 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..13dbbfe2a3 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 +641,23 @@ char_socket_event(void *opaque, QEMUChrEvent event)
> > > data->event = event;
> > > }
> > >
> > > +static void
> > > +char_socket_event_with_error(void *opaque, QEMUChrEvent event)
> > > +{
> > > + CharSocketTestData *data = opaque;
> > > + CharBackend *be = data->be;
> > > + data->event = event;
> > > + switch (event) {
> > > + case CHR_EVENT_OPENED:
> > > + 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)
> > > @@ -783,6 +802,7 @@ static void char_socket_server_test(gconstpointer
> > > opaque)
> > >
> > > reconnect:
> > > data.event = -1;
> > > + data.be = &be;
> > > qemu_chr_fe_set_handlers(&be, NULL, NULL,
> > > char_socket_event, NULL,
> > > &data, NULL, true);
> > > @@ -869,6 +889,7 @@ 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 +941,7 @@ static void
> > > char_socket_client_dupid_test(gconstpointer opaque)
> > > static void char_socket_client_test(gconstpointer opaque)
> > > {
> > > const CharSocketClientTestConfig *config = opaque;
> > > + const char_socket_cb event_cb = config->event_cb;
> > > QIOChannelSocket *ioc;
> > > char *optstr;
> > > Chardev *chr;
> > > @@ -983,8 +1005,9 @@ static void char_socket_client_test(gconstpointer
> > > opaque)
> > >
> > > reconnect:
> > > data.event = -1;
> > > + data.be = &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 == -1);
> > > @@ -1022,7 +1045,7 @@ static void char_socket_client_test(gconstpointer
> > > opaque)
> > > /* 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 == CHR_EVENT_OPENED);
> > > data.event = -1;
> > > @@ -1467,19 +1490,22 @@ int main(int argc, char **argv)
> > >
> > > #define SOCKET_CLIENT_TEST(name, addr) \
> > > static CharSocketClientTestConfig client1 ## name = \
> > > - { addr, NULL, false, false }; \
> > > + { addr, NULL, false, false, char_socket_event}; \
> > > static CharSocketClientTestConfig client2 ## name = \
> > > - { addr, NULL, true, false }; \
> > > + { addr, NULL, true, false, char_socket_event }; \
> > > static CharSocketClientTestConfig client3 ## name = \
> > > - { addr, ",reconnect=1", false }; \
> > > + { addr, ",reconnect=1", false, false, char_socket_event }; \
> > > static CharSocketClientTestConfig client4 ## name = \
> > > - { addr, ",reconnect=1", true }; \
> > > + { addr, ",reconnect=1", true, false, char_socket_event }; \
> > > static CharSocketClientTestConfig client5 ## name = \
> > > - { addr, NULL, false, true }; \
> > > + { addr, NULL, false, true, char_socket_event }; \
> > > static CharSocketClientTestConfig client6 ## name = \
> > > - { addr, NULL, true, true }; \
> > > + { addr, NULL, true, true, char_socket_event }; \
> > > static CharSocketClientTestConfig client7 ## name = \
> > > - { addr, ",reconnect=1", false, false }; \
> > > + { addr, ",reconnect=1", false, false, char_socket_event }; \
> > > + static CharSocketClientTestConfig client8 ## name = \
> > > + { addr, ",reconnect=1", 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 +1519,9 @@ 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
> > >
> >
>
- [PATCH 1/4] vhost-user-blk: delay vhost_user_blk_disconnect, (continued)
[PATCH v2] char-socket: initialize reconnect timer only when the timer doesn't start, Li Feng, 2020/04/28
[PATCH 4/4] vhost-user-blk: fix crash in realize process, Li Feng, 2020/04/14
[PATCH 2/4] vhost-user-blk: fix invalid memory access, Li Feng, 2020/04/14
Re: [PATCH 0/4] fix crashes when inject errors to vhost-user-blk chardev, Michael S. Tsirkin, 2020/04/17