On Thu, Apr 08, 2021 at 01:41:05PM +0200, Salvatore Bonaccorso wrote: > Hi Shyam, > > On Tue, Apr 06, 2021 at 05:01:17PM +0200, Salvatore Bonaccorso wrote: > > Hi, > > > > On Tue, Apr 06, 2021 at 02:00:48PM +0000, Shyam Prasad wrote: > > > Hi Greg, > > > We'll need to debug this further to understand what's going on. > > > > Greg asked it the same happens with 5.4 as well, I do not know I was > > not able to test 5.4.y (yet) but only 5.10.y and 4.19.y. > > > > > > Hi Salvatore, > > > Any chance that you'll be able to provide us the cifsFYI logs from the time of mount failure? > > > https://wiki.samba.org/index.php/LinuxCIFS_troubleshooting#Enabling_Debugging > > > > Please find it attached. Is this enough information? > > > > The mentioned home DFS link 'home' is a DFS link to > > msdfs:SECONDHOST\REDACTED on a Samba host. > > > > The mount is triggered as > > > > mount -t cifs //HOSTIP/REDACTED/home /mnt --verbose -o username='REDACTED,domain=DOMAIN' > > So I can confirm the issue is both present in 4.19.185 and 5.4.110 > upstream (without any Debian patches applied, we do not anyway apply > any cifs related one on top of the respetive upstream version). > > The issue is not present in 5.10.28. > > So I think there are commits as dependency of a738c93fb1c1 ("cifs: Set > CIFS_MOUNT_USE_PREFIX_PATH flag on setting cifs_sb->prepath.") which > are required and not applied in the released before 5.10.y which make > introducing the regression. Ok, I've dropped this from 5.4 and older kernel trees now, thanks for the report. greg k-h
