Just a little FYI, it seems if you go to convert a container where second-level quotas are established, the /etc/mtab symbolic link to /proc/mounts gets broken and isn't correctly re-established, so whenever the container is rebooted, the container will show the former simfs layout unless you re-create the symlink. Observe....
root@ctdev19 [~]# mount; echo; cat /proc/mounts; echo; ls -al /etc/mtab; echo;
/dev/simfs on / type reiserfs (rw,usrquota,grpquota)
proc on /proc type proc (rw,relatime)
sysfs on /sys type sysfs (rw,relatime)
none on /dev type devtmpfs (rw,relatime,mode=755)
none on /dev/pts type devpts (rw,relatime,mode=600,ptmxmode=000)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev,noexec,relatime)
tmpfs on /var/tmp type tmpfs (rw,nosuid,nodev,noexec,relatime)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,relatime)
/dev/ploop63231p1 / ext4 rw,relatime,barrier=1,data=ordered,balloon_ino=12,jqfmt=vfsv0,usrjquota=aquota.user,grpjquota=aquota.group 0 0
proc /proc proc rw,relatime 0 0
sysfs /sys sysfs rw,relatime 0 0
none /dev devtmpfs rw,relatime,mode=755 0 0
none /dev/pts devpts rw,relatime,mode=600,ptmxmode=000 0 0
tmpfs /tmp tmpfs rw,nosuid,nodev,noexec,relatime 0 0
tmpfs /var/tmp tmpfs rw,nosuid,nodev,noexec,relatime 0 0
none /proc/sys/fs/binfmt_misc binfmt_misc rw,relatime 0 0
-rw-r--r-- 1 root root 383 Aug 22 04:45 /etc/mtab
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
root@ctdev19 [~]# rm -rf /etc/mtab
root@ctdev19 [~]# ln -s /proc/mounts /etc/mtab
root@ctdev19 [~]# mount; echo; cat /proc/mounts; echo; ls -al /etc/mtab; echo;
/dev/ploop63231p1 on / type ext4 (rw,relatime,barrier=1,data=ordered,balloon_ino=12,jqfmt=vfsv0,usrjquota=aquota.user,grpjquota=aquota.group)
proc on /proc type proc (rw,relatime)
sysfs on /sys type sysfs (rw,relatime)
none on /dev type devtmpfs (rw,relatime,mode=755)
none on /dev/pts type devpts (rw,relatime,mode=600,ptmxmode=000)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev,noexec,relatime)
tmpfs on /var/tmp type tmpfs (rw,nosuid,nodev,noexec,relatime)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,relatime)
/dev/ploop63231p1 / ext4 rw,relatime,barrier=1,data=ordered,balloon_ino=12,jqfmt=vfsv0,usrjquota=aquota.user,grpjquota=aquota.group 0 0
proc /proc proc rw,relatime 0 0
sysfs /sys sysfs rw,relatime 0 0
none /dev devtmpfs rw,relatime,mode=755 0 0
none /dev/pts devpts rw,relatime,mode=600,ptmxmode=000 0 0
tmpfs /tmp tmpfs rw,nosuid,nodev,noexec,relatime 0 0
tmpfs /var/tmp tmpfs rw,nosuid,nodev,noexec,relatime 0 0
none /proc/sys/fs/binfmt_misc binfmt_misc rw,relatime 0 0
lrwxrwxrwx 1 root root 12 Aug 27 08:55 /etc/mtab -> /proc/mounts
The behavior of the conversion is normal if second-level quotas are temporarily disabled prior to converting to Ploop. If anyone feels like dissecting the conversion to find out why, be my guest. Otherwise I guess we'll just have to remember.
