[Samba] dos application - Samba

This is a discussion on [Samba] dos application - Samba ; Hi, By few months I have some troubles with a network dos application. Precisely application, randomly, get errors referring to access denied to any shared files or path not found and crash. I would ask you what kind of parameters ...

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Thread: [Samba] dos application

  1. [Samba] dos application

    Hi,

    By few months I have some troubles with a network dos application.
    Precisely application, randomly, get errors referring to access denied
    to any shared files or path not found and crash.

    I would ask you what kind of parameters I have to set in my "smb.conf"
    file (Samba v. 3.0.24), to make it more compatible with DOS 6.22.

    Many thanks.

    Marco.



    Marco Meli (IT Dept.)

    GKN SINTER METALS

    Via Verdi, 82

    Cernusco S/N I-20063 (MI) - Italy

    Tel: +39 02 929051 (452) (252)

    Fax: +39 02 9230690

    Email: marco.meli@gknsintermetals.com

    P Before printing, think about the Environment



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  2. Re: [Samba] dos application

    Hallo, Meli,

    Du (Marco.Meli) meintest am 22.05.08:

    > By few months I have some troubles with a network dos application.
    > Precisely application, randomly, get errors referring to access
    > denied to any shared files or path not found and crash.


    Sounds like an "oplock" problem - I prefer setting all "oplock" options
    to "no".

    > I would ask you what kind of parameters I have to set in my
    > "smb.conf" file (Samba v. 3.0.24), to make it more compatible with
    > DOS 6.22.


    You should update to 3.0.28a - the versions from 3.0.23 to 3.0.27 have
    made some problems with "oplocks".

    Viele Gruesse!
    Helmut
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  3. Re: [Samba] dos application

    On Thu, May 22, 2008 at 10:22:46AM +0200, Meli Marco wrote:
    > Hi,
    >
    > By few months I have some troubles with a network dos application.
    > Precisely application, randomly, get errors referring to access denied
    > to any shared files or path not found and crash.
    >
    > I would ask you what kind of parameters I have to set in my "smb.conf"
    > file (Samba v. 3.0.24), to make it more compatible with DOS 6.22.


    I'm not aware of anything in particular. Can you send your
    smb.conf debug logs?

    Volker

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  4. Re: [Samba] dos application

    On Thu, May 22, 2008 at 10:41:00AM +0200, Helmut Hullen wrote:
    > Hallo, Meli,
    >
    > Du (Marco.Meli) meintest am 22.05.08:
    >
    > > By few months I have some troubles with a network dos application.
    > > Precisely application, randomly, get errors referring to access
    > > denied to any shared files or path not found and crash.

    >
    > Sounds like an "oplock" problem - I prefer setting all "oplock" options
    > to "no".


    Just to make sure: Generally disabling oplocks is not what I
    would recommend.

    Volker

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  5. Re: [Samba] dos application

    Hallo, Volker,

    Du (Volker.Lendecke) meintest am 22.05.08:

    >>> By few months I have some troubles with a network dos application.
    >>> Precisely application, randomly, get errors referring to access
    >>> denied to any shared files or path not found and crash.


    >> Sounds like an "oplock" problem - I prefer setting all "oplock"
    >> options to "no".


    > Just to make sure: Generally disabling oplocks is not what I
    > would recommend.


    May be - I'm maintaining a school server which runs in some thousand
    schools, and disabling all oplocks is the most helpful way to avoid
    blocking the samba system (which most times needs a server restart to
    run again).

    If you have a better way: no problem to change to this way.

    ------------------

    Samba 3.0.22 had few such problems (but not zero problems), and Samba
    3.0.28x seems to have few such problems too.

    A colleague has developped a simple test mechanism: the (german) play
    "digdogs.exe" (a DOS game), lying on the server and run from many
    clients. If "oplock" is not set to "no" 10 clients can stop the server.

    http://helmut.hullen.de/filebox/spiele/

    Viele Gruesse!
    Helmut
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  6. Re: [Samba] dos application

    Hallo!

    On Thu, May 22, 2008 at 12:12:00PM +0200, Helmut Hullen wrote:

    > A colleague has developped a simple test mechanism: the (german) play
    > "digdogs.exe" (a DOS game), lying on the server and run from many
    > clients. If "oplock" is not set to "no" 10 clients can stop the server.
    >
    > http://helmut.hullen.de/filebox/spiele/


    If you can reproduce this, any chance you send in logfiles
    of a failure?

    debug pid = yes
    debug level = 10
    debug hires timestamp = yes
    max log size = 0

    ... together with a sniff?

    This is a bug that definitely needs to be fixed. And I don't
    have the environment right now with 10 or more clients, a
    classroom full of PCs would make this a lot easier :-)

    Volker

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  7. Re: [Samba] dos application

    Hallo, Volker,

    Du (Volker.Lendecke) meintest am 22.05.08:

    >> A colleague has developped a simple test mechanism: the (german)
    >> play "digdogs.exe" (a DOS game), lying on the server and run from
    >> many clients. If "oplock" is not set to "no" 10 clients can stop the
    >> server.
    >>
    >> http://helmut.hullen.de/filebox/spiele/


    > If you can reproduce this, any chance you send in logfiles
    > of a failure?


    Not simple - sorry.
    The schools I'm looking for all have set "* oplock = no", and they have
    3.0.28 or 3.0.28a.

    Maybe I can use one more special school, but I can't do the work within
    a short time.

    > debug pid = yes
    > debug level = 10
    > debug hires timestamp = yes
    > max log size = 0


    > ... together with a sniff?


    > This is a bug that definitely needs to be fixed. And I don't
    > have the environment right now with 10 or more clients, a
    > classroom full of PCs would make this a lot easier :-)


    Just wait some days.

    Viele Gruesse!
    Helmut
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  8. Re: R: [Samba] dos application

    On Thu, May 22, 2008 at 04:29:36PM +0200, Meli Marco wrote:
    > Below I've reported the debug logs and smb.conf.
    > Could be something referred to SOCKET OPTIONS settings?
    > Many thanks.


    Oh, sorry. By debug logs I meant debug level 10 logs of smbd
    leading to that error.

    Volker

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  9. R: [Samba] dos application

    Hi,
    Below I've reported the debug logs and smb.conf.
    Could be something referred to SOCKET OPTIONS settings?
    Many thanks.
    Logs:
    tail -n 100 log.00005a12c17c
    [2008/04/14 06:05:24, 1] smbd/service.c:make_connection_snum(950)
    00005a12c17c (10.90.19.64) connect to service data initially as user
    GKNSMI/diskless (uid=15751, gid=10000) (pid 16193)
    [2008/04/14 06:05:24, 1] smbd/service.c:make_connection_snum(950)
    00005a12c17c (10.90.19.64) connect to service data initially as user
    GKNSMI/diskless (uid=15751, gid=10000) (pid 16193)
    [2008/04/24 21:20:04, 0] lib/util_sock.c:read_data(534)
    read_data: read failure for 4 bytes to client 10.90.19.64. Error = No
    route to host
    [2008/04/24 21:20:04, 1] smbd/service.c:close_cnum(1150)
    00005a12c17c (10.90.19.64) closed connection to service data
    [2008/04/24 21:20:04, 1] smbd/service.c:close_cnum(1150)
    00005a12c17c (10.90.19.64) closed connection to service data
    [2008/04/24 21:36:09, 1] smbd/service.c:make_connection_snum(950)
    00005a12c17c (10.90.19.64) connect to service data initially as user
    GKNSMI/diskless (uid=15751, gid=10000) (pid 10315)
    [2008/04/24 21:36:09, 1] smbd/service.c:make_connection_snum(950)
    00005a12c17c (10.90.19.64) connect to service data initially as user
    GKNSMI/diskless (uid=15751, gid=10000) (pid 10315)
    [2008/04/28 23:56:49, 1] smbd/service.c:close_cnum(1150)
    00005a12c17c (10.90.19.64) closed connection to service data
    [2008/04/28 23:56:49, 1] smbd/service.c:close_cnum(1150)
    00005a12c17c (10.90.19.64) closed connection to service data
    [2008/04/28 23:56:55, 1] smbd/service.c:make_connection_snum(950)
    00005a12c17c (10.90.19.64) connect to service data initially as user
    GKNSMI/term (uid=15744, gid=10000) (pid 4960)
    [2008/04/28 23:56:55, 1] smbd/service.c:make_connection_snum(950)
    00005a12c17c (10.90.19.64) connect to service data initially as user
    GKNSMI/term (uid=15744, gid=10000) (pid 4960)
    [2008/04/29 00:00:47, 1] smbd/service.c:close_cnum(1150)
    00005a12c17c (10.90.19.64) closed connection to service data
    [2008/04/29 00:00:47, 1] smbd/service.c:close_cnum(1150)
    00005a12c17c (10.90.19.64) closed connection to service data
    [2008/04/29 00:06:39, 1] smbd/service.c:make_connection_snum(950)
    00005a12c17c (10.90.19.64) connect to service data initially as user
    GKNSMI/diskless (uid=15751, gid=10000) (pid 5022)
    [2008/04/29 00:06:39, 1] smbd/service.c:make_connection_snum(950)
    00005a12c17c (10.90.19.64) connect to service data initially as user
    GKNSMI/diskless (uid=15751, gid=10000) (pid 5022)
    [2008/04/29 00:06:46, 1] smbd/service.c:close_cnum(1150)
    00005a12c17c (10.90.19.64) closed connection to service data
    [2008/04/29 00:06:46, 1] smbd/service.c:close_cnum(1150)
    00005a12c17c (10.90.19.64) closed connection to service data
    [2008/04/29 00:06:52, 1] smbd/service.c:make_connection_snum(950)
    00005a12c17c (10.90.19.64) connect to service data initially as user
    GKNSMI/term (uid=15744, gid=10000) (pid 5023)
    [2008/04/29 00:06:52, 1] smbd/service.c:make_connection_snum(950)
    00005a12c17c (10.90.19.64) connect to service data initially as user
    GKNSMI/term (uid=15744, gid=10000) (pid 5023)
    [2008/04/29 00:11:26, 1] smbd/service.c:make_connection_snum(950)
    00005a12c17c (10.90.19.64) connect to service data initially as user
    GKNSMI/diskless (uid=15751, gid=10000) (pid 5071)
    [2008/04/29 00:11:26, 1] smbd/service.c:make_connection_snum(950)
    00005a12c17c (10.90.19.64) connect to service data initially as user
    GKNSMI/diskless (uid=15751, gid=10000) (pid 5071)
    [2008/04/29 00:12:25, 0] lib/util_sock.c:read_data(534)
    read_data: read failure for 4 bytes to client 10.90.19.64. Error =
    Connection reset by peer
    [2008/04/29 00:12:25, 1] smbd/service.c:close_cnum(1150)
    00005a12c17c (10.90.19.64) closed connection to service data
    [2008/04/29 00:12:25, 1] smbd/service.c:close_cnum(1150)
    00005a12c17c (10.90.19.64) closed connection to service data
    [2008/04/29 00:19:23, 1] smbd/service.c:close_cnum(1150)
    00005a12c17c (10.90.19.64) closed connection to service data
    [2008/04/29 00:19:23, 1] smbd/service.c:close_cnum(1150)
    00005a12c17c (10.90.19.64) closed connection to service data
    [2008/04/29 00:19:28, 1] smbd/service.c:make_connection_snum(950)
    00005a12c17c (10.90.19.64) connect to service data initially as user
    GKNSMI/term (uid=15744, gid=10000) (pid 5128)
    [2008/04/29 00:19:28, 1] smbd/service.c:make_connection_snum(950)
    00005a12c17c (10.90.19.64) connect to service data initially as user
    GKNSMI/term (uid=15744, gid=10000) (pid 5128)
    [2008/04/30 09:45:08, 1] smbd/service.c:close_cnum(1150)
    00005a12c17c (10.90.19.64) closed connection to service data
    [2008/04/30 09:45:08, 1] smbd/service.c:close_cnum(1150)
    00005a12c17c (10.90.19.64) closed connection to service data
    [2008/04/30 09:45:11, 1] smbd/service.c:make_connection_snum(950)
    00005a12c17c (10.90.19.64) connect to service data initially as user
    GKNSMI/term (uid=15744, gid=10000) (pid 19663)
    [2008/04/30 09:45:11, 1] smbd/service.c:make_connection_snum(950)
    00005a12c17c (10.90.19.64) connect to service data initially as user
    GKNSMI/term (uid=15744, gid=10000) (pid 19663)
    [2008/05/05 10:31:30, 1] smbd/service.c:make_connection_snum(950)
    00005a12c17c (10.90.19.64) connect to service data initially as user
    GKNSMI/diskless (uid=15751, gid=10000) (pid 21669)
    [2008/05/05 10:31:30, 1] smbd/service.c:make_connection_snum(950)
    00005a12c17c (10.90.19.64) connect to service data initially as user
    GKNSMI/diskless (uid=15751, gid=10000) (pid 21669)
    [2008/05/05 10:31:54, 0] lib/util_sock.c:read_data(534)
    read_data: read failure for 4 bytes to client 10.90.19.64. Error =
    Connection reset by peer
    [2008/05/05 10:31:54, 1] smbd/service.c:close_cnum(1150)
    00005a12c17c (10.90.19.64) closed connection to service data
    [2008/05/05 10:31:54, 1] smbd/service.c:close_cnum(1150)
    00005a12c17c (10.90.19.64) closed connection to service data
    [2008/05/05 11:03:54, 1] smbd/service.c:make_connection_snum(950)
    00005a12c17c (10.90.19.64) connect to service data initially as user
    GKNSMI/diskless (uid=15751, gid=10000) (pid 22081)
    [2008/05/05 11:03:54, 1] smbd/service.c:make_connection_snum(950)
    00005a12c17c (10.90.19.64) connect to service data initially as user
    GKNSMI/diskless (uid=15751, gid=10000) (pid 22081)
    [2008/05/05 11:06:34, 0] lib/util_sock.c:read_data(534)
    read_data: read failure for 4 bytes to client 10.90.19.64. Error =
    Connection reset by peer
    [2008/05/05 11:06:34, 1] smbd/service.c:close_cnum(1150)
    00005a12c17c (10.90.19.64) closed connection to service data
    [2008/05/05 11:06:34, 1] smbd/service.c:close_cnum(1150)
    00005a12c17c (10.90.19.64) closed connection to service data
    [2008/05/16 12:04:07, 1] smbd/service.c:close_cnum(1150)
    00005a12c17c (10.90.19.64) closed connection to service data
    [2008/05/16 12:04:07, 1] smbd/service.c:close_cnum(1150)
    00005a12c17c (10.90.19.64) closed connection to service data
    [2008/05/16 12:13:01, 1] smbd/service.c:make_connection_snum(950)
    00005a12c17c (10.90.19.64) connect to service data initially as user
    GKNSMI/diskless (uid=15751, gid=10000) (pid 24030)
    [2008/05/16 12:13:01, 1] smbd/service.c:make_connection_snum(950)
    00005a12c17c (10.90.19.64) connect to service data initially as user
    GKNSMI/diskless (uid=15751, gid=10000) (pid 24030)
    [2008/05/16 12:13:05, 1] smbd/service.c:close_cnum(1150)
    00005a12c17c (10.90.19.64) closed connection to service data
    [2008/05/16 12:13:05, 1] smbd/service.c:close_cnum(1150)
    00005a12c17c (10.90.19.64) closed connection to service data
    [2008/05/16 12:13:07, 1] smbd/service.c:make_connection_snum(950)
    00005a12c17c (10.90.19.64) connect to service data initially as user
    GKNSMI/term (uid=15744, gid=10000) (pid 24031)
    [2008/05/16 12:13:07, 1] smbd/service.c:make_connection_snum(950)
    00005a12c17c (10.90.19.64) connect to service data initially as user
    GKNSMI/term (uid=15744, gid=10000) (pid 24031)

    SMB.CONF:
    [global]
    netbios name =
    wins server =
    unix charset = LOCALE
    socket options = IPTOS_LOWDELAY TCP_NODELAY SO_KEEPALIVE
    workgroup =
    realm =
    security = ADS
    password server =
    encrypt passwords = yes
    allow trusted domains = Yes
    winbind use default domain = Yes
    winbind separator = /
    winbind enum users = Yes
    winbind enum groups = yes
    idmap uid = 10000-100000
    idmap gid = 10000-100000
    hide unreadable = Yes
    template shell = /bin/false
    use sendfile = No
    admin users =
    log file = /var/log/samba/log.%m
    log level = 1
    max log size = 50
    printing = cups
    printcap name = cups
    load printers = Yes
    map acl inherit = Yes
    nt acl support = Yes
    client schannel = No
    [data]
    comment = %D Share
    path = /data
    read only = No
    create mask = 0775
    security mask = 0777
    force security mode = 0
    directory mask = 0775
    directory security mask = 0777
    force directory security mode = 0
    dos filetimes = Yes
    valid users =

    -----Messaggio originale-----
    Da: Volker Lendecke [mailto:Volker.Lendecke@SerNet.DE]
    Inviato: 22 May 2008 11:08
    A: Meli Marco
    Cc: samba@lists.samba.org
    Oggetto: Re: [Samba] dos application

    On Thu, May 22, 2008 at 10:22:46AM +0200, Meli Marco wrote:
    > Hi,
    >
    > By few months I have some troubles with a network dos application.
    > Precisely application, randomly, get errors referring to access denied
    > to any shared files or path not found and crash.
    >
    > I would ask you what kind of parameters I have to set in my "smb.conf"
    > file (Samba v. 3.0.24), to make it more compatible with DOS 6.22.


    I'm not aware of anything in particular. Can you send your
    smb.conf debug logs?

    Volker
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  10. R: R: [Samba] dos application

    Ok, I've set log level = 10.
    I've to restart smb and winbind?
    Thanks.
    Marco.

    -----Messaggio originale-----
    Da: Volker Lendecke [mailto:Volker.Lendecke@SerNet.DE]
    Inviato: 22 May 2008 16:47
    A: Meli Marco
    Cc: samba@lists.samba.org
    Oggetto: Re: R: [Samba] dos application

    On Thu, May 22, 2008 at 04:29:36PM +0200, Meli Marco wrote:
    > Below I've reported the debug logs and smb.conf.
    > Could be something referred to SOCKET OPTIONS settings?
    > Many thanks.


    Oh, sorry. By debug logs I meant debug level 10 logs of smbd
    leading to that error.

    Volker
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  11. Re: R: R: [Samba] dos application

    On Thu, May 22, 2008 at 04:58:32PM +0200, Meli Marco wrote:
    > Ok, I've set log level = 10.
    > I've to restart smb and winbind?


    Yes, please.

    Please also set max log size large enough so that the
    logfiles are not rotated away.

    Volker

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  12. RE: R: R: [Samba] dos application


    > -----Original Message-----
    > From: samba-bounces+jdinkel=bucoks.com@lists.samba.org [mailto:samba-
    > bounces+jdinkel=bucoks.com@lists.samba.org] On Behalf Of Volker

    Lendecke
    > Sent: Thursday, May 22, 2008 10:03 AM
    > To: Meli Marco
    > Cc: samba@lists.samba.org
    > Subject: Re: R: R: [Samba] dos application
    >
    > On Thu, May 22, 2008 at 04:58:32PM +0200, Meli Marco wrote:
    > > Ok, I've set log level = 10.
    > > I've to restart smb and winbind?

    >
    > Yes, please.
    >
    > Please also set max log size large enough so that the
    > logfiles are not rotated away.
    >
    > Volker


    Shouldn't he be able to just do "sudo smbcontrol smb reload-config" ?

    James

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  13. R: R: R: [Samba] dos application

    Hi Volker,
    Could I send the log files? It's happen again this morning.
    Thanks.
    Marco.

    -----Messaggio originale-----
    Da: Volker Lendecke [mailto:Volker.Lendecke@SerNet.DE]
    Inviato: 22 May 2008 17:03
    A: Meli Marco
    Cc: samba@lists.samba.org
    Oggetto: Re: R: R: [Samba] dos application

    On Thu, May 22, 2008 at 04:58:32PM +0200, Meli Marco wrote:
    > Ok, I've set log level = 10.
    > I've to restart smb and winbind?


    Yes, please.

    Please also set max log size large enough so that the
    logfiles are not rotated away.

    Volker
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  14. Re: R: R: R: [Samba] dos application

    On Mon, May 26, 2008 at 08:56:39AM +0200, Meli Marco wrote:
    > Could I send the log files? It's happen again this morning.


    Please file a bug report at https://bugzilla.samba.org/ and
    upload the logfiles there. Then it's available for review by
    everyone.

    Thanks,

    Volker

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