zfs discuss - Feb 2006 - cannot unmount pool

I''m running snv_28. I created a pool called "swap". I get an
error when trying to destroy it or change the mountpoint. I believe this is
because it is confusing it with the entry for my swap partition in /etc/mnttab.

bash-3.00# zpool destroy swap
cannot unmount ''/etc/svc/volatile'': Device busy
could not destroy ''swap'': could not unmount datasets

bash-3.00# zfs set mountpoint=/foo swap
cannot unmount ''/etc/svc/volatile'': Device busy

bash-3.00# zpool status swap
  pool: swap
 state: ONLINE
 scrub: none requested
config:

        NAME                 STATE     READ WRITE CKSUM
        swap                 ONLINE       0     0     0
          /zfstest/swapfile  ONLINE       0     0     0

bash-3.00# zpool list swap
NAME                    SIZE    USED   AVAIL    CAP  HEALTH     ALTROOT
swap                   2.98G   44.5K   2.98G     0%  ONLINE     -

bash-3.00# zfs get mountpoint swap
NAME             PROPERTY       VALUE                      SOURCE
swap             mountpoint     /swap                      default

bash-3.00# df -k | egrep "swap|File"
Filesystem            kbytes    used   avail capacity  Mounted on
swap                  422176     572  421604     1%    /etc/svc/volatile
swap                  421864     260  421604     1%    /tmp
swap                  421632      28  421604     1%    /var/run
swap                 3104896       8 3104853     1%    /swap

bash-3.00# cat /etc/mnttab | grep swap
swap    /etc/svc/volatile       tmpfs   xattr,dev=4480001       1136940872
swap    /tmp    tmpfs   xattr,dev=4480002       1136940893
swap    /var/run        tmpfs   xattr,dev=4480003       1136940893
swap    /swap   zfs     rw,devices,setuid,exec,atime,dev=2d90019       
1139004158

bash-3.00# uname -a
SunOS unknown 5.11 snv_28 i86pc i386 i86pc
This message posted from opensolaris.org

On Fri, Feb 03, 2006 at 02:44:23PM -0800, Naveen Nalam
wrote:
>
> I''m running snv_28. I created a pool called "swap". I
get an error
> when trying to destroy it or change the mountpoint. I believe this is
> because it is confusing it with the entry for my swap partition in
> /etc/mnttab.
> 
Yes, the code in zfs_unmount() is searching only be special ("swap" in
this case), and not checking that it a filesystem of type "zfs". 
Please
file a bug at:

http://bugs.opensolaris.org

Thanks for reporting this.

- Eric

--
Eric Schrock, Solaris Kernel Development       http://blogs.sun.com/eschrock