inaccessible snapshot in .zfs directory

[nedbass]

I was playing around with snapshots and managed to create one that can't be accessed through the .zfs/snapshot directory. I was able to clone and mount the snapshot manually.

ubuntu@ubuntu:~/zfs$ ls -l /tank/.zfs/snapshot/
ls: cannot access /tank/.zfs/snapshot/zfs-auto-snap_hourly-2012-12-10-0918: No such file or directory
total 25
dr-xr-xr-x 1 root root 0 Dec 10 21:01 a
drwxr-xr-x 2 root root 1027 Dec 10 21:03 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
drwxr-xr-x 2 root root 1027 Dec 10 21:03 zfs-auto-snap_hourly-2012-12-10-0910
dr-xr-xr-x 1 root root 0 Dec 10 21:08 zfs-auto-snap_hourly-2012-12-10-0916
dr-xr-xr-x 1 root root 0 Dec 10 21:02 zfs-auto-snap_hourly-2012-12-10-0917
d????????? ? ? ? ? ? zfs-auto-snap_hourly-2012-12-10-0918
dr-xr-xr-x 1 root root 0 Dec 10 21:07 zfs-auto-snap_hourly-2012-12-10-0919

ubuntu@ubuntu:~/zfs$ sudo ./cmd/zfs/zfs get all tank@zfs-auto-snap_hourly-2012-12-10-0918
NAME PROPERTY VALUE SOURCE
tank@zfs-auto-snap_hourly-2012-12-10-0918 type snapshot -
tank@zfs-auto-snap_hourly-2012-12-10-0918 creation Mon Dec 10 21:04 2012 -
tank@zfs-auto-snap_hourly-2012-12-10-0918 used 0 -
tank@zfs-auto-snap_hourly-2012-12-10-0918 referenced 142K -
tank@zfs-auto-snap_hourly-2012-12-10-0918 compressratio 1.00x -
tank@zfs-auto-snap_hourly-2012-12-10-0918 devices on default
tank@zfs-auto-snap_hourly-2012-12-10-0918 exec on default
tank@zfs-auto-snap_hourly-2012-12-10-0918 setuid on default
tank@zfs-auto-snap_hourly-2012-12-10-0918 xattr on default
tank@zfs-auto-snap_hourly-2012-12-10-0918 version 5 -
tank@zfs-auto-snap_hourly-2012-12-10-0918 utf8only off -
tank@zfs-auto-snap_hourly-2012-12-10-0918 normalization none -
tank@zfs-auto-snap_hourly-2012-12-10-0918 casesensitivity sensitive -
tank@zfs-auto-snap_hourly-2012-12-10-0918 nbmand off default
tank@zfs-auto-snap_hourly-2012-12-10-0918 primarycache all default
tank@zfs-auto-snap_hourly-2012-12-10-0918 secondarycache all default
tank@zfs-auto-snap_hourly-2012-12-10-0918 defer_destroy off -
tank@zfs-auto-snap_hourly-2012-12-10-0918 userrefs 0 -
tank@zfs-auto-snap_hourly-2012-12-10-0918 mlslabel none default
tank@zfs-auto-snap_hourly-2012-12-10-0918 refcompressratio 1.00x -
tank@zfs-auto-snap_hourly-2012-12-10-0918 written 131K -
tank@zfs-auto-snap_hourly-2012-12-10-0918 clones -

ubuntu@ubuntu:/zfs$ uname -a
Linux ubuntu 3.2.0-29-generic #46-Ubuntu SMP Fri Jul 27 17:03:23 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
ubuntu@ubuntu:/zfs$ git log -n1 --oneline
e4d89e9 Switch KM_SLEEP to KM_PUSHPAGE

[behlendorf]

@nedbass Do you think this may have been resolved by your f1a05fa fix? Do you still have the snapshot around, is it still causing troubles?

[nedbass]

I don't have the snapshot around anymore, but it seems likely that this is resolved by that fix. Closing.