Patch to smbinfo tool (in cifs-utils) to allow listing previous
versions (snapshots) of an SMB3 mounted share.  Note that cifs.ko has
a mount option "snapshot=" which can be used to mount the previous
version of a share.

Sample output:

$ ./smbinfo list-snapshots /mnt/file
Number of snapshots: 5 Number of snapshots returned: 5
Snapshot list:
1) @GMT-2019.03.27-20.52.19
2) @GMT-2019.03.27-20.50.20
3) @GMT-2019.03.16-22.25.54
4) @GMT-2019.03.16-22.22.28
5) @GMT-2018.10.12-08.30.11


-- 
Thanks,

Steve