[Bug 1896699] Re: Mounting a share in fstab fails with BAD_NETWORK_NAME

[Andreas Hasenack]

> mount -t cifs //192.168.1.200/Drive_E /mnt/server_e -o credentials=/root/.smbcredentials_server
> 
> The following fstab entry fails:
> //server/Server_E /mnt/server_e cifs uid=0,credentials=/root/.smbcredentials_server,file_mode=0755,dir_mode=0755,vers=2.1,sec=ntlmssp 0 0

> [ 2079.955734] CIFS VFS: BAD_NETWORK_NAME: \\192.168.1.200\Server_E
CIFS VFS: cifs_mount failed w/return code = -2

This error usually means the share name is incorrect. Have you checked
your fstab file for extraneous characters, bad line-ending, that kind of
stuff? Try "cat -vet /etc/fstab" as that will show control characters.

You also have quite different options in the fstab line versus your
shown command line, but I suspect you tested many combinations already
and just pasted one of the iterations.

Also, try to start with a simpler fstab line. For example:
//192.168.1.200/Drive_E /mnt/server_e cifs 0 0

And go from there if it works.

Regarding the documentation, the cifs mount options are listed in the
mount.cifs manpage

Some people have also been getting hard to debug cifs errors and fixed
them by installing keyutils. I can't say that's the case here, as the
command line works and I don't see evidence of kerberos authentication,
but you might try that.


** Package changed: samba (Ubuntu) => cifs-utils (Ubuntu)

** Changed in: cifs-utils (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1896699

Title:
  Mounting a share in fstab fails with BAD_NETWORK_NAME

Status in cifs-utils package in Ubuntu:
  Incomplete

Bug description:
  The following command works:
  mount -t cifs //192.168.1.200/Drive_E /mnt/server_e -o credentials=/root/.smbcredentials_server 

  The following fstab entry fails:
  //server/Server_E /mnt/server_e   cifs   uid=0,credentials=/root/.smbcredentials_server,file_mode=0755,dir_mode=0755,vers=2.1,sec=ntlmssp  0  0

  There is an entry in hosts for server. It also fails with //192.168.1.200/Server_E
  Sometimes it says:
  No dialect specified on mount. Default has changed to a more secure dialect, SMB2.1 or later (e.g. SMB3), from CIFS (SMB1). To use the less secure SMB1 dialect to access old servers which do not support SMB3 (or SMB2.1) specify vers=1.0 on mount.
  [ 2079.955734] CIFS VFS:  BAD_NETWORK_NAME: \\192.168.1.200\Server_E
  CIFS VFS: cifs_mount failed w/return code = -2

  trying vers=1.0 and vers=3.0 makes no difference.

  There is no documentations of CIFS VFS error codes
  There is no documentation of how to specify the SMB dialect.
  People appear to have been having trouble with these things for at least the past 10 years.

  I never had a problem with this on debian.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: samba 2:4.11.6+dfsg-0ubuntu1.4
  ProcVersionSignature: Ubuntu 5.4.0-47.51-generic 5.4.55
  Uname: Linux 5.4.0-47-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia ufsd
  ApportVersion: 2.20.11-0ubuntu27.8
  Architecture: amd64
  CIFSMounts: /root/smb4k/192.168.1.200/Drive_E //192.168.1.200/Drive_E cifs   rw,relatime,vers=3.1.1,cache=strict,username=essin,domain=WORKGROUP,uid=0,forceuid,gid=0,forcegid,addr=192.168.1.200,file_mode=0755,dir_mode=0755,soft,nounix,serverino,mapposix,rsize=4194304,wsize=4194304,bsize=1048576,echo_interval=60,actimeo=1
  CasperMD5CheckResult: skip
  CurrentDesktop: XFCE
  Date: Tue Sep 22 17:35:02 2020
  InstallationDate: Installed on 2020-09-18 (4 days ago)
  InstallationMedia: Xubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
  ProcEnviron:
   LANGUAGE=en_US
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SambaClientRegression: Yes
  SourcePackage: samba
  UpgradeStatus: No upgrade log present (probably fresh install)

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