Public bug reported:
This is a regression, with kernel 4.15 everything works fine, with
5.3.x, 5.4.x it does not.
Mounting of a DFS root is possible with all kernels with this fstab entry:
//company.com/dfs00 /mnt/dfs00 cifs users,domain=de,username=xyz,noauto 0 0
Then, with 4.15 it is possible to traverse (browse) /mnt/dfs00
Also with both 4.15 and 5.x it is possible to "ls /mnt/dfs00"
But starting with 5.3 trying to, e.g., "ls /mnt/dfs00/subdirxy" fails with the
following sequence of mount errors reported in the system log:
CIFS: Attempting to mount //someserver.company.com/dfs00/subdirxy
CIFS VFS: BAD_NETWORK_NAME: \\someserver.company.com\dfs00
CIFS VFS: BAD_NETWORK_NAME: \\xy.company.com\subdirxy
CIFS VFS: BAD_NETWORK_NAME: \\xy.company.com\subdirxy
** Affects: linux-meta-hwe (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1887351
Title:
CIFS / DFS mount: traversing folder structure no longer possible
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