[Freeswitch-users] mod_gsmopen - deadlock tty
Luiz Fernando Softov
fernando at softov.com.br
Fri Sep 25 22:10:07 MSD 2015
I make a daemon, witch manage USB using kqueue and other things, so, every
time i plug or unplug a modem, i make a event, like ARRIVE and LEAVE.
This daemon have a list of modems, correlate with ttys ids - U3G (U0.0,
U0.1, U0.2) and UMODEM (U0 U1 U2)
So, when a modem ARRIVE, and it's "attached" (configured), i call a "gsm
reload".
When a modem LEAVE, i call a gsm remove interface_x.
Using mod_xml_curl, i have dynamic config.
I use events, like gsmopen_dump list, to manage and controll interfaces,
like when user "detach" a modem.
If you want, send me a e-mail, i will give access to my system and you can
see what i'm talking about.
Anyway, i found things like in function
int gsmopen_serial_write_AT_noack(private_t *tech_pvt, const char *data)
// You make
LOKKA(tech_pvt->controldev_lock);
Then call gsmopen_serial_write_AT(tech_pvt, data), and
inside gsmopen_serial_write_AT, when something is wrong, you
make UNLOCKA(tech_pvt->controldev_lock); and return -1
But, you check if (gsmopen_serial_write_AT(tech_pvt, data) != (int)
strlen(data)) {
Then, you make again UNLOCKA(tech_pvt->controldev_lock);
Why make two times UNLOCKA(tech_pvt->controldev_lock); ?
It's like
LOKKA(tech_pvt->controldev_lock);
UNLOCKA(tech_pvt->controldev_lock);
UNLOCKA(tech_pvt->controldev_lock);
Another is in
int gsmopen_serial_read_AT(private_t *tech_pvt, int look_for_ack, int
timeout_usec, int timeout_sec, const char *expected_string, int expect_crlf)
You make a LOKKA(tech_pvt->controldev_lock);, but there is some returns
(inside try catch), without UNLOCKA.
Sorry if i make some mistakes in my explanation, but i just want to
undestand how this funcions works.
I disagree with "Shaabir" about this module is not useable. I just think
this need some changes to work fine.
I already test this module with 40 modems for 7 days, and it's work fine,
until i grab a deadlock in USB.
Giovanni, if you have time to chat with me, i will be grateful.
2015-09-25 12:41 GMT-04:00 Giovanni Maruzzelli <gmaruzz at gmail.com>:
> for plugging and unplugging modems, that's a very difficult thing to
> manage, this is the best I can come out with (and probably does not work in
> freebsd):
>
>
> http://wiki.freeswitch.org/wiki/GSMopen#IMEI_and_IMSI_automatic_device_discovery_.28only_on_Linux.29_2
>
> you're welcome to find a similar mechanism, and file a jira with a pull
> request, so it will be inserted in manline.
>
> If your modifications only apply to freebsd, please use #ifdefs, so it
> still continue to compile and work in Linux.
>
> -giovanni
>
>
> Sincerely,
>
> Giovanni Maruzzelli
> Cell : +39-347-2665618
>
> On Fri, Sep 25, 2015 at 6:24 PM, Luiz Fernando Softov <
> fernando at softov.com.br> wrote:
>
>> I'm using a USB with power supply.
>>
>> But sometimes it's just happen. Sometimes user remove and plug modem
>> again.
>>
>> I can't use Debian, because our system depends of FreeBSD, and we have a
>> lot of source (daemons) running, based, on that platform. And we use
>> kqueue, I think Debian don't have kqueue, it's like epool, but better, much
>> better.
>>
>> Anyway, I don't That it's a kernel problem, because, since I have another
>> daemon, attached in ttyx.0 (mod_gsmopen attach to ttyx.3), and when modem
>> power off or "reset", only ttyx.3 still locked.
>>
>> I'm trying to read the source to figure what's happening, but it's hard
>> to read, not because the source is difficult, but because isn't organized.
>>
>> I'm thinking in rewrite the module, but if in future someone change
>> something in original module I will need to check my source.
>> There is another thing, I don't know how things like apr_thread works,
>> and what functions like switch_sleep(1000000) do and why using that.
>>
>> Today I make some alterations where the module make a lock, LOKKA, there
>> is some functions who don't have unlock, and another who only have unlock,
>> sometimes two unlocks. So I will wait to see what will happen.
>>
>> Now, here it's 3:00 am, and I'm going to sleep, almost 19 hours awake up,
>> trying to debug this module and another things.
>>
>>
>> Maybe you or someone have a time, to chat, or reply some e-mails, or
>> maybe here, to explain some questions about the source (module)?
>>
>> There's some lines marked with TODO, why?
>> And there is another version of this module?
>> Which the maximum number of modems that you already usage?
>>
>> 2015-09-25 7:53 GMT-04:00 Giovanni Maruzzelli <gmaruzz at gmail.com>:
>>
>>> if you found problems, please open a jira issue, with all info to
>>> replicate the problem, as explained in gsmopen page.
>>>
>>> It would be useful for us developers, and to me personally, being the
>>> person in charge of gsmopen.
>>>
>>> Thanks in advance,
>>>
>>> -giovanni
>>>
>>> Sincerely,
>>>
>>> Giovanni Maruzzelli
>>> Cell : +39-347-2665618
>>>
>>> On Fri, Sep 25, 2015 at 1:44 PM, Shabbir abbasi <
>>> shabbirabbasi92 at gmail.com> wrote:
>>>
>>>> mod_gsmopen needs more development work, i have tested it sometimes
>>>> ago and found it is not useable , so now i am using asterisk with
>>>> chan_dongle better then gsmopen without usb HUB
>>>>
>>>> On Fri, Sep 25, 2015 at 11:11 AM, Giovanni Maruzzelli <
>>>> gmaruzz at gmail.com> wrote:
>>>>
>>>>> This seems to be a kernel problem.
>>>>>
>>>>> To have the most success chances: use a USB hub with power supply (eg,
>>>>> a USB hub that get electrical power from the wall socket).
>>>>> Also, use the reference.platform, debian 8 jessie, instead of freebsd.
>>>>>
>>>>> -goovanni
>>>>>
>>>>> sent from my mobile,
>>>>> Giovanni Maruzzelli
>>>>> cell: +39 347 266 56 18
>>>>> On Sep 25, 2015 7:19 AM, "Luiz Fernando Softov" <
>>>>> fernando at softov.com.br> wrote:
>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> I'm using freeswitch 1.15 in Freebsd 10.1, with mod_gsmopen
>>>>>>
>>>>>> FreeSWITCH Version 1.5.15b+git~20150407T231134Z~d55c4a053b~64bit (git
>>>>>> d55c4a0 2015-04-07 23:11:34Z 64bit), whats happen, its the same with
>>>>>> another versions like, 1.6, 1.4.19, etc
>>>>>>
>>>>>> After sometime running freeswitch, i have this TTYs.
>>>>>>
>>>>>> crw------- 1 root wheel 0x8e Sep 24 15:30 ttyU1.3
>>>>>> crw------- 1 root wheel 0x8f Sep 24 15:30 ttyU1.3.init
>>>>>> crw------- 1 root wheel 0x90 Sep 24 15:30 ttyU1.3.lock
>>>>>> crw------- 1 root wheel 0x8e Sep 24 15:30 ttyU2.3
>>>>>> crw------- 1 root wheel 0x8f Sep 24 15:30 ttyU2.3.init
>>>>>> crw------- 1 root wheel 0x90 Sep 24 15:30 ttyU2.3.lock
>>>>>> crw------- 1 root wheel 0x8e Sep 24 15:30 ttyU3.3
>>>>>> crw------- 1 root wheel 0x8f Sep 24 15:30 ttyU3.3.init
>>>>>> crw------- 1 root wheel 0x90 Sep 24 15:30 ttyU3.3.lock
>>>>>> crw------- 1 root wheel 0x76 Sep 25 00:46 ttyU4.0
>>>>>> crw------- 1 root wheel 0x77 Sep 24 22:28 ttyU4.0.init
>>>>>> crw------- 1 root wheel 0x78 Sep 24 22:28 ttyU4.0.lock
>>>>>> crw------- 1 root wheel 0x7c Sep 24 22:28 ttyU4.1
>>>>>> crw------- 1 root wheel 0x7d Sep 24 22:28 ttyU4.1.init
>>>>>> crw------- 1 root wheel 0x7e Sep 24 22:28 ttyU4.1.lock
>>>>>> crw------- 1 root wheel 0x82 Sep 24 22:28 ttyU4.2
>>>>>> crw------- 1 root wheel 0x83 Sep 24 22:28 ttyU4.2.init
>>>>>> crw------- 1 root wheel 0x84 Sep 24 22:28 ttyU4.2.lock
>>>>>> crw------- 1 root wheel 0x8e Sep 24 22:28 ttyU4.3
>>>>>> crw------- 1 root wheel 0x8f Sep 24 22:28 ttyU4.3.init
>>>>>> crw------- 1 root wheel 0x90 Sep 24 22:28 ttyU4.3.lock
>>>>>> crw------- 1 root wheel 0xa8 Sep 25 00:46 ttyU5.0
>>>>>> crw------- 1 root wheel 0xa9 Sep 24 22:28 ttyU5.0.init
>>>>>> crw------- 1 root wheel 0xaa Sep 24 22:28 ttyU5.0.lock
>>>>>> crw------- 1 root wheel 0xae Sep 24 22:28 ttyU5.1
>>>>>> crw------- 1 root wheel 0xaf Sep 24 22:28 ttyU5.1.init
>>>>>> crw------- 1 root wheel 0xb6 Sep 24 22:28 ttyU5.1.lock
>>>>>> crw------- 1 root wheel 0xba Sep 24 22:28 ttyU5.2
>>>>>> crw------- 1 root wheel 0xbb Sep 24 22:28 ttyU5.2.init
>>>>>> crw------- 1 root wheel 0xbc Sep 24 22:28 ttyU5.2.lock
>>>>>> crw------- 1 root wheel 0xc0 Sep 24 22:28 ttyU5.3
>>>>>> crw------- 1 root wheel 0xc1 Sep 24 22:28 ttyU5.3.init
>>>>>> crw------- 1 root wheel 0xc2 Sep 24 22:28 ttyU5.3.lock
>>>>>>
>>>>>> As you can see, ttyU1.3, ttyU2.3, ttyU3.3 are USB deadlocks
>>>>>>
>>>>>> I try to unload mod_gsmopen, but i receive a message that is in use
>>>>>> so i kill freeswitch, then ttyU1.3, ttyU2.3, ttyU3.3, are free and
>>>>>> disappear (as well .init and .lock)
>>>>>>
>>>>>> I try to figure out whats happening, with logs, alarms, but i can't.
>>>>>> Someone have the same problem, or know the solution?
>>>>>>
>>>>>>
>>>>>> ps.
>>>>>> Reading the list, i realize that few members use the module, or don't
>>>>>> have problems.
>>>>>> If i am correct, is there any other way to use GSM modems or GSM,
>>>>>> which is low cost?
>>>>>> Is there anyone who can guide me in some things about the code or
>>>>>> tips?
>>>>>>
>>>>>> ps 2.
>>>>>> sorry about my english
>>>>>>
>>>>>> --
>>>>>> Luiz Fernando Softov
>>>>>> http://www.softov.com.br
>>>>>> fernando at softov.com.br
>>>>>>
>>>>>>
>>>>>> _________________________________________________________________________
>>>>>> Professional FreeSWITCH Consulting Services:
>>>>>> consulting at freeswitch.org
>>>>>> http://www.freeswitchsolutions.com
>>>>>>
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>>>>>>
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>>>>>>
>>>>>
>>>>>
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>>>>> http://www.freeswitchsolutions.com
>>>>>
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>>>>
>>>>
>>>>
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>>>> http://www.freeswitchsolutions.com
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>>>
>>>
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>>>
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>>
>>
>>
>> --
>> Luiz Fernando Softov
>> http://www.softov.com.br
>> fernando at softov.com.br
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
>> http://confluence.freeswitch.org
>> http://www.cluecon.com
>>
>> FreeSWITCH-users mailing list
>> FreeSWITCH-users at lists.freeswitch.org
>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
>> http://www.freeswitch.org
>>
>
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> Official FreeSWITCH Sites
> http://www.freeswitch.org
> http://confluence.freeswitch.org
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>
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>
--
Luiz Fernando Softov
http://www.softov.com.br
fernando at softov.com.br
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