Linux – CIFS VFS: BAD_NETWORK_NAME on Linux

cifslinuxsmbfsvfs

I am struggling with an issue of Windows SMB share mounted on Linux servers getting disconnected once in a while.

To give a brief introduction about my environment, I have few linux servers which has CIFS shares mounted from Windows file share (support SMB 3 only). I have mounted these shares on Linux servers with below option via fstab file.

//servername/folder /localfolder   cifs   credentials=/login.txt,x-systemd.automount,x-systemd.device-timeout=5,_netdev,noserverino,noperm,sec=ntlmssp,vers=3.0 0 0

The above share gets disconnected and automatically unmounted once in a while (no regular frequency, may be in few days or once in a week) from the Linux servers. Upon checking the messages logs, I see below error:

kernel: CIFS VFS: BAD_NETWORK_NAME: \\servername\folder

To fix this, I have to manually unmount the share and mount it again.

As you can see in the mount option from fstab file, I have given options to automatically remount the share upon disconnection. But it doesn't work still. Am I using wrong mount options or is it a known issue? I need help desperately here.

Best Answer

I had the same problem. This post mentions that you need to indicate the name of the share and not the exact path:

sudo mount.cifs -o credentials=/home/pierrejean/.smbcredentials_207 //192.168.1.207/volume2/Samba /mnt/Samba

-> mount error(2): No such file or directory
(BAD_NETWORK_NAME: \192.168.1.207\volume2)

sudo mount.cifs -o credentials=/home/pierrejean/.smbcredentials_207 //192.168.1.207/Samba /mnt/Samba

-> works as expected

Related Solutions

Windows – Mount Remote CIFS/SMB Share as Folder

Just to map a network share directory you would use this command:

net use \\Server\ShareName\Directory

This mapping would:

not be persistent
would have to be established and authenticated at user login
you would access the share using the UNC path, and not a local drive letter

If you want to access the network share through a location on your local C: drive, you'll want to set up a symbolic link:

mklink /d  C:\Folder\ShareName \\Server\ShareName\Directory

Now when you navigate to C:\Folder\Share you'll see the contents of \\\Server\Sharename\Directory. You'll still need to provide authentication for the resource with something like net use (or just be logged into a domain account on a domain system that has access) otherwise the link will probably error out angrily.

Linux CIFS – Fixing Stick-Bit and Permission Issues on Mounted Drives

What OS is the server? Does it support CIFS Unix extensions? If not then nothing you do with chmod matters. You can set the user owner, file and directory permissions by setting options within your mount.

http://linux.die.net/man/8/mount.cifs

uid=arg
sets the uid that will own all files on the mounted filesystem. It may be specified as either a username or a numeric uid. This parameter is ignored when the target server supports the CIFS Unix extensions.

gid=arg
sets the gid that will own all files on the mounted filesystem. It may be specified as either a groupname or a numeric gid. This parameter is ignored when the target server supports the CIFS Unix extensions.

file_mode=arg If the server does not support the CIFS Unix extensions this overrides the default file mode.

dir_mode=arg If the server does not support the CIFS Unix extensions this overrides the default mode for directories.

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