samba shadow_copy vfs module is broken

[Chetan Chauhan]

I am trying to use samba on 5.11 NexentaOS_20090926 .

When the shadow_copy vfs module is enabled in smb.conf and i browse the share i can't see ANY files . the share hows up blank.
However if i try to create a new directory then samba will not allow me if the directory exists in the zfs mount.

I can see files in /mnt/home just fine via ssh . also /mnt/home/.zfs/snapshots exists and i can see the snapshots.

------------- BEGIN smb.conf --------------
[global]
workgroup=HOME

[home]
  path=/mnt/home
  vfs objects = shadow_copy
  writeable = yes
  browseable = yes
  shadow_copy: path = .zfs/snapshot
  shadow_copy: prefix = GMT-
  shadow_copy: sort = desc

------------- END smb.conf --------------

The bug matches exactly with the info in http://www.edplese.com/samba-with-zfs.html

According to the site you need to apply http://www.edplese.com/files/samba-3.0.25-1-dirent-fix.patch to samba to fix a bug in the shadow_copy vfs module

I don't know if samba 3.2 has already applied the patch upstream , but since we are stuck with 3.0.x in nexenta i would urge the nexenta maintainers to apply the patch. Without it shadow_copy module is useless.

[anilg (anil-verve)]

I rebuilt samba with the patch.. and the new package deb files are at

http://www.nexenta.org/~anil/samba_dirent_patch/libpam-smbpass_3.0.28a-2-build2_solaris-i386.deb
http://www.nexenta.org/~anil/samba_dirent_patch/libsmbclient-dev_3.0.28a-2-build2_solaris-i386.deb
http://www.nexenta.org/~anil/samba_dirent_patch/libsmbclient_3.0.28a-2-build2_solaris-i386.deb
http://www.nexenta.org/~anil/samba_dirent_patch/python-samba_3.0.28a-2-build2_solaris-i386.deb
http://www.nexenta.org/~anil/samba_dirent_patch/samba-common_3.0.28a-2-build2_solaris-i386.deb
http://www.nexenta.org/~anil/samba_dirent_patch/samba-dbg_3.0.28a-2-build2_solaris-i386.deb
http://www.nexenta.org/~anil/samba_dirent_patch/samba-doc-pdf_3.0.28a-2-build2_all.deb
http://www.nexenta.org/~anil/samba_dirent_patch/samba-doc_3.0.28a-2-build2_all.deb
http://www.nexenta.org/~anil/samba_dirent_patch/samba_3.0.28a-2-build2_solaris-i386.changes
http://www.nexenta.org/~anil/samba_dirent_patch/samba_3.0.28a-2-build2_solaris-i386.deb
http://www.nexenta.org/~anil/samba_dirent_patch/smbclient_3.0.28a-2-build2_solaris-i386.deb
http://www.nexenta.org/~anil/samba_dirent_patch/swat_3.0.28a-2-build2_solaris-i386.deb
http://www.nexenta.org/~anil/samba_dirent_patch/winbind_3.0.28a-2-build2_solaris-i386.deb

/usr/lib/samba/vfs/shadow_copy.so is provided by samba_3.0.28a-2-build2_solaris-i386.deb .. this is the one I assume you have to reinstall.

Can you confirm this package works?

[Chetan Chauhan (chetan)]

Going away to gurgaon for a few days . will check this ASAP once i get back.

[Oliver Feilner (nexenta-nospam)]

Hello,

I'm not the creator of this incident report but I have tested it.
But it did not work!

How I did it I took a brand new installation of NexentaCore 3 Beta 2, downloaded all mentioned .deb files and installed them via "dpkg -i -R ." afterwards I fixed the dependencies by "apt-get -f install".

I also applied the changes to smb.conf and created several snapshots before and after changing data
 zfs snapshot /pool/daten@GMT-`date -u +%Y.%m.%d-%H.%M.%S`

Please FIX!