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Peter Piechutzki

2004-Oct-15 10:39 UTC

[Samba] Directory Name '.../pipe' not allowed ? Samba Bug ?

Hi All,

scenario:
Samba Version 2.2.8a-UL
running on Suse Linux Enterprise 8
Kernel Version 2.4.21-241-smp
as Server

Windows 2000 SP4 as Client

Trying to import a MS-Foxpro file into MS-ACCESS. MS-Foxpro File residing on
Samba Server.
The Foxpro filename is 'projects.dbf'. During import MS-Access tries to
also
open a non existent file 'projects.inf'
depending on the path in which the file resides Samba will return different
Error Messages to the smb client (windows machine)

either NT_STATUS_OBJECT_NAME_NOT_FOUND which is correct (Example 1)

or NT_STATUS_ACCESS_DENIED which is the wrong return code. (Example 2)

Aur problem was that a filename like 'cad/pipe/projects.dbf' resulted in
the
access denied message wich led the MS-Access Programm into error whilst a
filename like 'test/pipe/projects.dbf' will return with the correct file
not
found.

Any 3 letter or less path before the /pipe/ results in the error. We've
managed to level it down to the  "Check a filename for the pipe
string."
Function
static void check_for_pipe(const char *fname) in the Samba source code
'open.c'.

Our solution for now is not to name any directory 'pipe' so that the
parsing
function won't get confused but this can't really be a solution.

Any Ideas welcome.

Best regards

Peter Piechutzki


**********************Example 1 working o.k.********************************
[2004/10/15 10:24:52, 10] smbd/mangle_hash.c:is_mangled(317)
  is_mangled: projects.INF : False
[2004/10/15 10:24:52, 5] smbd/filename.c:unix_convert(319)
  New file projects.INF
[2004/10/15 10:24:52, 3] smbd/dosmode.c:unix_mode(111)
  unix_mode(Zwischenablage/Jaeger/pipe/projects.INF) returning 0777
[2004/10/15 10:24:52, 5] smbd/files.c:file_new(123)
  allocated file structure 9547, fnum = 13643 (3 used)
[2004/10/15 10:24:52, 10] smbd/open.c:open_file_shared1(808)
  open_file_shared: fname = Zwischenablage/Jaeger/pipe/projects.INF,
share_mode = 40, ofun = 1, mode = 777, oplock request = 0
[2004/10/15 10:24:52, 8] lib/util.c:is_in_path(1145)
  is_in_path: Zwischenablage/Jaeger/pipe/projects.INF
[2004/10/15 10:24:52, 8] lib/util.c:is_in_path(1150)
  is_in_path: no name list.
[2004/10/15 10:24:52, 3] lib/util.c:unix_clean_name(387)
  unix_clean_name [Zwischenablage/Jaeger/pipe/projects.INF]
[2004/10/15 10:24:52, 4] smbd/open.c:open_file_shared1(974)
  calling open_file with flags=0x0 flags2=0x0 mode=0777
[2004/10/15 10:24:52, 10] smbd/open.c:fd_open(53)
  fd_open: name Zwischenablage/Jaeger/pipe/projects.INF, flags = 00 mode 0777,
fd = -1. No such file or directory
[2004/10/15 10:24:52, 3] smbd/open.c:open_file(177)
  Error opening file Zwischenablage/Jaeger/pipe/projects.INF (No such file
or directory) (local_flags=0) (flags=0)
[2004/10/15 10:24:52, 5] smbd/files.c:file_free(346)
  freed files structure 13643 (2 used)
[2004/10/15 10:24:52, 3] smbd/error.c:error_packet(94)
  error string = No such file or directory
[2004/10/15 10:24:52, 3] smbd/error.c:error_packet(113)
  error packet at smbd/nttrans.c(889) cmd=162 (SMBntcreateX)
NT_STATUS_OBJECT_NAME_NOT_FOUND


**********************Example 2 WRONG ERRROR PACKET
********************************
[2004/10/14 17:29:21, 10] smbd/mangle_hash.c:is_mangled(317)
  is_mangled: projects.INF : False
[2004/10/14 17:29:21, 5] smbd/filename.c:unix_convert(319)
  New file projects.INF
[2004/10/14 17:29:21, 3] smbd/dosmode.c:unix_mode(111)
  unix_mode(cad/pipe/projects.INF) returning 0777
[2004/10/14 17:29:21, 5] smbd/files.c:file_new(123)
  allocated file structure 4092, fnum = 8188 (3 used)
[2004/10/14 17:29:21, 10] smbd/open.c:open_file_shared1(808)
  open_file_shared: fname = cad/pipe/projects.INF, share_mode = 40, ofun 1, mode
= 777, oplock request = 0
[2004/10/14 17:29:21, 8] lib/util.c:is_in_path(1145)
  is_in_path: cad/pipe/projects.INF
[2004/10/14 17:29:21, 8] lib/util.c:is_in_path(1150)
  is_in_path: no name list.
[2004/10/14 17:29:21, 3] lib/util.c:unix_clean_name(387)
  unix_clean_name [cad/pipe/projects.INF]
[2004/10/14 17:29:21, 4] smbd/open.c:open_file_shared1(974)
  calling open_file with flags=0x0 flags2=0x0 mode=0777
[2004/10/14 17:29:21, 10] smbd/open.c:fd_open(53)
  fd_open: name cad/pipe/projects.INF, flags = 00 mode = 0777, fd = -1. No
such file or directory
[2004/10/14 17:29:21, 3] smbd/open.c:open_file(177)
  Error opening file cad/pipe/projects.INF (No such file or directory)
(local_flags=0) (flags=0)
[2004/10/14 17:29:21, 3] smbd/open.c:check_for_pipe(81)
  Rejecting named pipe open for cad/pipe/projects.INF
[2004/10/14 17:29:21, 5] smbd/files.c:file_free(346)
  freed files structure 8188 (2 used)
[2004/10/14 17:29:21, 3] smbd/error.c:error_packet(94)
  error string = No such file or directory
[2004/10/14 17:29:21, 3] smbd/error.c:error_packet(113)
  error packet at smbd/nttrans.c(889) cmd=162 (SMBntcreateX)
NT_STATUS_ACCESS_DENIED

******************OUR SMB.CONF************************

# Samba config file created using SWAT
# from 0.0.0.0 (0.0.0.0)
# Date: 2004/06/17 14:04:34

# Global parameters
[global]
 workgroup = OURDOMAIN.DE
 netbios name = FILESERVER
 server string = Our Fileserver Samba %v
 interfaces = 192.168.1.10/24
 encrypt passwords = Yes
 min passwd length = 2
 map to guest = Bad User
 unix password sync = Yes
 log level = 1
 log file = /var/log/samba/log.%m
 time server = Yes
 unix extensions = Yes
 socket options = SO_KEEPALIVE TCP_NODELAY IPTOS_LOWDELAY
 printcap name = CUPS
 add user script = /usr/sbin/useradd -d /dev/null -g 100 -s /bin/false -M %u
 os level = 255
 domain logons = Yes
 local master = Yes
 security = user
 preferred master = Yes
 domain master = Yes
 wins support = Yes
 admin users = @administratoren
 printing = cups
 deadtime = 0
 acl compatibility = win2k

[Konstruktion]
 comment = Zeichnungen und Konstruktionsdaten
 path = /daten/konstruktion
 valid users @cad_user_admin,@cad_user,@cad_user_leser,@administratoren,@olymp
 admin users = @administratoren,@cad_user_admin
 read only = No
 force create mode = 0777
 force directory mode = 0777

rruegner

2004-Oct-15 10:56 UTC

head link

[Samba] Directory Name '.../pipe' not allowed ? Samba Bug ?

Hi,
first of all update your samba version , you find suses samba 3 packs
on ftp.suse.com projects samba
data base errors are well known

read here
Kernel Oplocks are essentially a method that allows the Linux kernel to 
co-exist with Samba's oplocked files, although this has provided better 
integration of MS Windows network file locking with the underlying OS, 
SGI IRIX and Linux are the only two OSs that are oplock-aware at this time.

Unless your system supports kernel oplocks, you should disable oplocks 
if you are accessing the same files from both UNIX/Linux and SMB 
clients. Regardless, oplocks should always be disabled if you are 
sharing a database file (e.g., Microsoft Access) between multiple 
clients, as any break the first client receives will affect 
synchronization of the entire file (not just the single record), which 
will result in a noticeable performance impairment and, more likely, 
problems accessing the database in the first place. Notably, Microsoft 
Outlook's personal folders (*.pst) react quite badly to oplocks. If in 
doubt, disable oplocks and tune your system from that point.

http://us1.samba.org/samba/docs/man/Samba-HOWTO-Collection/locking.html


a solution maybe

You can disable oplocks on a per-share basis with the following:
[acctdata]
oplocks = False
level2 oplocks = False
The default oplock type is Level1. Level2 oplocks are enabled on a 
per-share basis in the smb.conf file.
Alternately, you could disable oplocks on a per-file basis within the 
share:
veto oplock files = /*.mdb/*.MDB/*.dbf/*.DBF/

Regards

Peter Piechutzki schrieb:> Hi All,
> 
> scenario:
> Samba Version 2.2.8a-UL
> running on Suse Linux Enterprise 8
> Kernel Version 2.4.21-241-smp
> as Server
> 
> Windows 2000 SP4 as Client
> 
> Trying to import a MS-Foxpro file into MS-ACCESS. MS-Foxpro File residing
on
> Samba Server.
> The Foxpro filename is 'projects.dbf'. During import MS-Access
tries to also
> open a non existent file 'projects.inf'
> depending on the path in which the file resides Samba will return different
> Error Messages to the smb client (windows machine)
> 
> either NT_STATUS_OBJECT_NAME_NOT_FOUND which is correct (Example 1)
> 
> or NT_STATUS_ACCESS_DENIED which is the wrong return code. (Example 2)
> 
> Aur problem was that a filename like 'cad/pipe/projects.dbf'
resulted in the
> access denied message wich led the MS-Access Programm into error whilst a
> filename like 'test/pipe/projects.dbf' will return with the correct
file not
> found.
> 
> Any 3 letter or less path before the /pipe/ results in the error. We've
> managed to level it down to the  "Check a filename for the pipe
string."
> Function
> static void check_for_pipe(const char *fname) in the Samba source code
> 'open.c'.
> 
> Our solution for now is not to name any directory 'pipe' so that
the parsing
> function won't get confused but this can't really be a solution.
> 
> Any Ideas welcome.
> 
> Best regards
> 
> Peter Piechutzki
> 
> 
> **********************Example 1 working
o.k.********************************
> [2004/10/15 10:24:52, 10] smbd/mangle_hash.c:is_mangled(317)
>   is_mangled: projects.INF : False
> [2004/10/15 10:24:52, 5] smbd/filename.c:unix_convert(319)
>   New file projects.INF
> [2004/10/15 10:24:52, 3] smbd/dosmode.c:unix_mode(111)
>   unix_mode(Zwischenablage/Jaeger/pipe/projects.INF) returning 0777
> [2004/10/15 10:24:52, 5] smbd/files.c:file_new(123)
>   allocated file structure 9547, fnum = 13643 (3 used)
> [2004/10/15 10:24:52, 10] smbd/open.c:open_file_shared1(808)
>   open_file_shared: fname = Zwischenablage/Jaeger/pipe/projects.INF,
> share_mode = 40, ofun = 1, mode = 777, oplock request = 0
> [2004/10/15 10:24:52, 8] lib/util.c:is_in_path(1145)
>   is_in_path: Zwischenablage/Jaeger/pipe/projects.INF
> [2004/10/15 10:24:52, 8] lib/util.c:is_in_path(1150)
>   is_in_path: no name list.
> [2004/10/15 10:24:52, 3] lib/util.c:unix_clean_name(387)
>   unix_clean_name [Zwischenablage/Jaeger/pipe/projects.INF]
> [2004/10/15 10:24:52, 4] smbd/open.c:open_file_shared1(974)
>   calling open_file with flags=0x0 flags2=0x0 mode=0777
> [2004/10/15 10:24:52, 10] smbd/open.c:fd_open(53)
>   fd_open: name Zwischenablage/Jaeger/pipe/projects.INF, flags = 00 mode
> 0777, fd = -1. No such file or directory
> [2004/10/15 10:24:52, 3] smbd/open.c:open_file(177)
>   Error opening file Zwischenablage/Jaeger/pipe/projects.INF (No such file
> or directory) (local_flags=0) (flags=0)
> [2004/10/15 10:24:52, 5] smbd/files.c:file_free(346)
>   freed files structure 13643 (2 used)
> [2004/10/15 10:24:52, 3] smbd/error.c:error_packet(94)
>   error string = No such file or directory
> [2004/10/15 10:24:52, 3] smbd/error.c:error_packet(113)
>   error packet at smbd/nttrans.c(889) cmd=162 (SMBntcreateX)
> NT_STATUS_OBJECT_NAME_NOT_FOUND
> 
> 
> **********************Example 2 WRONG ERRROR PACKET
> ********************************
> [2004/10/14 17:29:21, 10] smbd/mangle_hash.c:is_mangled(317)
>   is_mangled: projects.INF : False
> [2004/10/14 17:29:21, 5] smbd/filename.c:unix_convert(319)
>   New file projects.INF
> [2004/10/14 17:29:21, 3] smbd/dosmode.c:unix_mode(111)
>   unix_mode(cad/pipe/projects.INF) returning 0777
> [2004/10/14 17:29:21, 5] smbd/files.c:file_new(123)
>   allocated file structure 4092, fnum = 8188 (3 used)
> [2004/10/14 17:29:21, 10] smbd/open.c:open_file_shared1(808)
>   open_file_shared: fname = cad/pipe/projects.INF, share_mode = 40, ofun
> 1, mode = 777, oplock request = 0
> [2004/10/14 17:29:21, 8] lib/util.c:is_in_path(1145)
>   is_in_path: cad/pipe/projects.INF
> [2004/10/14 17:29:21, 8] lib/util.c:is_in_path(1150)
>   is_in_path: no name list.
> [2004/10/14 17:29:21, 3] lib/util.c:unix_clean_name(387)
>   unix_clean_name [cad/pipe/projects.INF]
> [2004/10/14 17:29:21, 4] smbd/open.c:open_file_shared1(974)
>   calling open_file with flags=0x0 flags2=0x0 mode=0777
> [2004/10/14 17:29:21, 10] smbd/open.c:fd_open(53)
>   fd_open: name cad/pipe/projects.INF, flags = 00 mode = 0777, fd = -1. No
> such file or directory
> [2004/10/14 17:29:21, 3] smbd/open.c:open_file(177)
>   Error opening file cad/pipe/projects.INF (No such file or directory)
> (local_flags=0) (flags=0)
> [2004/10/14 17:29:21, 3] smbd/open.c:check_for_pipe(81)
>   Rejecting named pipe open for cad/pipe/projects.INF
> [2004/10/14 17:29:21, 5] smbd/files.c:file_free(346)
>   freed files structure 8188 (2 used)
> [2004/10/14 17:29:21, 3] smbd/error.c:error_packet(94)
>   error string = No such file or directory
> [2004/10/14 17:29:21, 3] smbd/error.c:error_packet(113)
>   error packet at smbd/nttrans.c(889) cmd=162 (SMBntcreateX)
> NT_STATUS_ACCESS_DENIED
> 
> ******************OUR SMB.CONF************************
> 
> # Samba config file created using SWAT
> # from 0.0.0.0 (0.0.0.0)
> # Date: 2004/06/17 14:04:34
> 
> # Global parameters
> [global]
>  workgroup = OURDOMAIN.DE
>  netbios name = FILESERVER
>  server string = Our Fileserver Samba %v
>  interfaces = 192.168.1.10/24
>  encrypt passwords = Yes
>  min passwd length = 2
>  map to guest = Bad User
>  unix password sync = Yes
>  log level = 1
>  log file = /var/log/samba/log.%m
>  time server = Yes
>  unix extensions = Yes
>  socket options = SO_KEEPALIVE TCP_NODELAY IPTOS_LOWDELAY
>  printcap name = CUPS
>  add user script = /usr/sbin/useradd -d /dev/null -g 100 -s /bin/false -M
%u
>  os level = 255
>  domain logons = Yes
>  local master = Yes
>  security = user
>  preferred master = Yes
>  domain master = Yes
>  wins support = Yes
>  admin users = @administratoren
>  printing = cups
>  deadtime = 0
>  acl compatibility = win2k
> 
> [Konstruktion]
>  comment = Zeichnungen und Konstruktionsdaten
>  path = /daten/konstruktion
>  valid users >
@cad_user_admin,@cad_user,@cad_user_leser,@administratoren,@olymp
>  admin users = @administratoren,@cad_user_admin
>  read only = No
>  force create mode = 0777
>  force directory mode = 0777
> 
>

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