Hi Paulo, Apologies for the delay. I built the patch you placed at the end of your message into a test kernel for our customer, based on 5.4-rc7. I also sent the customer a vanilla 5.4-rc7 to test against, to see if the patch is what fixes the problem. The customer just got back to me, and confirmed that vanilla 5.4-rc7 fails to mount their multi tier DFS share, and the patched 5.4-rc7 with the patch you provided successfully mounts their multi tier DFS share. Not working - Vanilla 5.4-rc7 $ uname -rv 5.4.0-rc7 #4 SMP Wed Nov 13 17:23:52 NZDT 2019 $ sudo mount -v -t cifs //company.com/folders/country/<share> -o defaults,user=<user> /mnt/share Password for <user>@//company.com/folders/country/<share>: ************ mount.cifs kernel mount options: ip=<IPv4 Address>,unc=\\company.com\folders,user=<user>,prefixpath=country/<share>,pass=********** mount error(2): No such file or directory Refer to the mount.cifs(8) manual page (e.g. man mount.cifs) Working - Patched 5.4-rc7 with https://paste.ubuntu.com/p/DnCTNMjQJC/ $ uname -rv 5.4.0-rc7+upstreampatch1+ #3 SMP Wed Nov 13 16:42:34 NZDT 2019 $ sudo mount -v -t cifs //company.com/folders/country/<share> -o defaults,user=<user> /mnt/share Password for <user>@//company.com/folders/country/<share>: ************ mount.cifs kernel mount options: ip=<IPv4 Address>,unc=\\company.com\folders,user=<user>,prefixpath=country/<share>,pass=********** $ cd /mnt/share/ :/mnt/share$ ll total 4 drwxr-xr-x 2 root root 0 Oct 18 2017 ./ drwxr-xr-x 3 root root 4096 Nov 19 15:51 ../ drwxr-xr-x 2 root root 0 Oct 23 15:27 <Directory>/ drwxr-xr-x 2 root root 0 Aug 13 2018 <Directory 2>/ Please, go ahead and prepare the patch for mainline inclusion, and as Steve mentioned before, consider cc stable. Thank you for developing the fix quickly. Matthew Ruffell Sustaining Engineer @ Canonical
