https://bugzilla.samba.org/show_bug.cgi?id=14498 Bug ID: 14498 Summary: Why is mount -a is not detecting an already mounted DFS share endpoint Product: CifsVFS Version: 3.x Hardware: x64 OS: Linux Status: NEW Severity: normal Priority: P5 Component: user space tools Assignee: jlayton@xxxxxxxxx Reporter: Chris@xxxxxxxxxxxxxxxxxx QA Contact: cifs-qa@xxxxxxxxx Target Milestone: --- I am trying to figure out why mount -a is not detecting an already mounted DFS share endpoint. It works as expected on mount.cifs version 5.5 but not 6.7 Distributor ID: Debian Description: Debian GNU/Linux 9.13 (stretch) Release: 9.13 Codename: stretch Mount.cifs version 6.7. /etc/fstab //ctserver6/ops_apps /mnt/ops_apps cifs defaults,credentials=/root/.smbcredentials,rw,users,_netdev,soft 0 0 //ctserverbc/Public /mnt/ctserverbc cifs defaults,credentials=/root/.smbcredentials,rw,users,_netdev,soft 0 0 #//ctserver3/ops /mnt/ops cifs defaults,credentials=/root/.smbcredentials,rw,users,_netdev,soft 0 0 #//ctserver3/public /mnt/public cifs defaults,credentials=/root/.smbcredentials,rw,users,_netdev,soft 0 0 //ctdomain.local/DFS_OPS/OPS /mnt/ops cifs vers=2.1,credentials=/root/.smbcredentials,rw,users,_netdev,soft 0 0 //ctdomain.local/DFS_OPS/Public /mnt/public cifs vers=2.1,credentials=/root/.smbcredentials,rw,users,_netdev,soft 0 0 If I leave off the vers=2.1 option it will create a new mount process and duplicate in /proc/mounts : /mnt/ops_apps : already mounted /mnt/ctserverbc : already mounted mount.cifs kernel mount options: ip=192.168.111.10,unc=\\ctdomain.local\DFS_OPS,soft,user=ctlinux,prefixpath=OPS,pass=******** /mnt/ops : successfully mounted mount.cifs kernel mount options: ip=192.168.111.20,unc=\\ctdomain.local\DFS_OPS,soft,user=ctlinux,prefixpath=Public,pass=******** /mnt/public : successfully mounted With vers=2.1 I get: /mnt/ops_apps : already mounted /mnt/ctserverbc : already mounted mount.cifs kernel mount options: ip=192.168.111.20,unc=\\ctdomain.local\DFS_OPS,vers=2.1,soft,user=ctlinux,prefixpath=OPS,pass=******** mount error(16): Device or resource busy Refer to the mount.cifs(8) manual page (e.g. man mount.cifs) mount.cifs kernel mount options: ip=192.168.111.20,unc=\\ctdomain.local\DFS_OPS,vers=2.1,soft,user=ctlinux,prefixpath=Public,pass=******** mount error(16): Device or resource busy Refer to the mount.cifs(8) manual page (e.g. man mount.cifs) On 5.5 it will detect the DFS share is mounted already -- Chris Pickett | Linux Systems Engineer -- You are receiving this mail because: You are the QA Contact for the bug.
