On Fri, Aug 10, 2018 at 02:38:31AM -0500, Steve French via samba-technical wrote: > mounting with the "snapshots=" mount parm allows a read-only > view of a previous version of a file system (see MS-SMB2 > and "timewarp" tokens, section 2.2.13.2.6) based on the timestamp > passed in on the snapshots mount parm. > > Add processing to optionally send this create context. > > Example output: > > /mnt1 is mounted with "snapshots=..." and will see an earlier > version of the directory, with three fewer files than /mnt2 > the current version of the directory. > > root@Ubuntu-17-Virtual-Machine:~/cifs-2.6# cat /proc/mounts | grep cifs > //172.22.149.186/public /mnt1 cifs > ro,relatime,vers=default,cache=strict,username=smfrench,uid=0,noforceuid,gid=0,noforcegid,addr=172.22.149.186,file_mode=0755,dir_mode=0755,soft,nounix,mapposix,rsize=1048576,wsize=1048576,echo_interval=60,snapshot=131748608570000000,actimeo=1 > > //172.22.149.186/public /mnt2 cifs > rw,relatime,vers=default,cache=strict,username=smfrench,uid=0,noforceuid,gid=0,noforcegid,addr=172.22.149.186,file_mode=0755,dir_mode=0755,soft,nounix,mapposix,rsize=1048576,wsize=1048576,echo_interval=60,actimeo=1 > > root@Ubuntu-17-Virtual-Machine:~/cifs-2.6# ls /mnt1 > EmptyDir newerdir > root@Ubuntu-17-Virtual-Machine:~/cifs-2.6# ls /mnt1/newerdir > > root@Ubuntu-17-Virtual-Machine:~/cifs-2.6# ls /mnt2 > EmptyDir file newerdir newestdir timestamp-trace.cap > root@Ubuntu-17-Virtual-Machine:~/cifs-2.6# ls /mnt2/newerdir > new-file-not-in-snapshot > > Snapshots are extremely useful for comparing previous versions of > files or directories, > and recovering from data corruptions or mistakes. > > > See attached patch Great work Steve ! Well done ! Great to see this available from the Linux client. Cheers, Jeremy.
