kern/172197: Userquota (as well as groupquota) does not work on ZFS (possible regression)

[Derek Kulinski]

>Number:         172197
>Category:       kern
>Synopsis:       Userquota (as well as groupquota) does not work on ZFS (possible regression)
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Oct 01 03:00:21 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator:     Derek Kulinski
>Release:        FreeBSD 9.0
>Organization:
>Environment:
FreeBSD chinatsu.takeda.tk 9.0-RELEASE-p4 FreeBSD 9.0-RELEASE-p4 #2: Sun Sep 30 17:10:32 PDT 2012     root at chinatsu.takeda.tk:/usr/obj/tank/junk/src/sys/CHINATSU  amd64

>Description:
I actually just started uzing ZFS since version 9 and seeing some communication on mailing lists, looks like this behavior is incorrect.

Here's an example:

[chinatsu]:/root# zfs userspace tank
TYPE        NAME  USED  QUOTA
POSIX User  root    6K  none
[chinatsu]:/root# zfs set userquota at takeda=5M tank
[chinatsu]:/root# zfs userspace tank
TYPE        NAME    USED  QUOTA
POSIX User  root      6K  none
POSIX User  takeda    5M

Please note that the above command updated USED value and not quota. As I show later the USED value is not updated based on storage usage and the quota is not enforced at all. I don't think it is necessary, but I also compiled the kernel with "options QUOTA".

[chinatsu]:/root# zfs set userquota at takeda=100M tank
[chinatsu]:/root# zfs userspace tank
TYPE        NAME    USED  QUOTA
POSIX User  root      6K  none
POSIX User  takeda  100M
[chinatsu]:/root# zfs set userquota at takeda=1000P tank
[chinatsu]:/root# zfs userspace tank
TYPE        NAME    USED  QUOTA
POSIX User  root      6K  none
POSIX User  takeda  1000P
[chinatsu]:/root# zfs set userquota at takeda=1M tank
[chinatsu]:/root# su - takeda
➜  ~  dd if=/dev/urandom bs=512k count=10 of=testfile1
10+0 records in
10+0 records out
5242880 bytes transferred in 0.433006 secs (12108105 bytes/sec)
➜  ~  dd if=/dev/urandom bs=512k count=10 of=testfile2
10+0 records in
10+0 records out
5242880 bytes transferred in 0.072985 secs (71835100 bytes/sec)
➜  ~  ls -lh testfile*
-rw-r--r--  1 takeda  users   5,0M 30 wrz 19:50 testfile1
-rw-r--r--  1 takeda  users   5,0M 30 wrz 19:50 testfile2
➜  ~
[chinatsu]:/root# zfs userspace tank
TYPE        NAME    USED  QUOTA
POSIX User  root      6K  none
POSIX User  takeda    1M

>How-To-Repeat:
Perform the steps described in description.
>Fix:
I know too little to recommend anything.

>Release-Note:
>Audit-Trail:
>Unformatted: