&author.jelmer;
&author.jht;
TimPotter
SimoSorceoriginal vfs_skel README
AlexanderBokovoyoriginal vfs_netatalk docs
StefanMetzmacherUpdate for multiple modules
Stackable VFS modules
Features and Benefits
Since Samba-3, there is support for stackable VFS(Virtual File System) modules.
Samba passes each request to access the unix file system thru the loaded VFS modules.
This chapter covers all the modules that come with the samba source and references to
some external modules.
Discussion
If not supplied with your platform distribution binary Samba package you may have problems
to compile these modules, as shared libraries are compiled and linked in different ways
on different systems. They currently have been tested against GNU/Linux and IRIX.
To use the VFS modules, create a share similar to the one below. The
important parameter is the vfs objects parameter where
you can list one or more VFS modules by name. For example, to log all access
to files and put deleted files in a recycle bin:
[audit]
comment = Audited /data directory
path = /data
vfs objects = audit recycle
writeable = yes
browseable = yes
The modules are used in the order in which they are specified.
Samba will attempt to load modules from the lib
directory in the root directory of the samba installation (usually
/usr/lib/samba/vfs or /usr/local/samba/lib/vfs
).
Some modules can be used twice for the same share.
This can be done using a configuration similar to the one below.
[test]
comment = VFS TEST
path = /data
writeable = yes
browseable = yes
vfs objects = example:example1 example example:test
example1: parameter = 1
example: parameter = 5
test: parameter = 7
Included modules
audit
A simple module to audit file access to the syslog
facility. The following operations are logged:
share
connect/disconnect
directory opens/create/remove
file open/close/rename/unlink/chmod
extd_audit
This module is identical with the audit module above except
that it sends audit logs to both syslog as well as the smbd log file/s. The
loglevel for this module is set in the smb.conf file.
The logging information that will be written to the smbd log file is controlled by
the log level parameter in smb.conf. The
following information will be recorded:
Extended Auditing Log Information
Log LevelLog Details - File and Directory Operations
0Creation / Deletion
1Create / Delete / Rename / Permission Changes
2Create / Delete / Rename / Perm Change / Open / Close
fake_perms
This module was created to allow Roaming Profile files and directories to be set (on the Samba server
under Unix) as read only. This module will if installed on the Profiles share will report to the client
that the Profile files and directories are writable. This satisfies the client even though the files
will never be overwritten as the client logs out or shuts down.
recycle
A recycle-bin like module. When used any unlink call
will be intercepted and files moved to the recycle
directory instead of being deleted.
Supported options:
recycle:repository
FIXME
recycle:keeptree
FIXME
recycle:versions
FIXME
recycle:touch
FIXME
recycle:maxsize
FIXME
recycle:exclude
FIXME
recycle:exclude_dir
FIXME
recycle:noversions
FIXME
netatalk
A netatalk module, that will ease co-existence of samba and
netatalk file sharing services.
Advantages compared to the old netatalk module:
it doesn't care about creating of .AppleDouble forks, just keeps them in sync
if a share in &smb.conf; doesn't contain .AppleDouble item in hide or veto list, it will be added automatically
VFS modules available elsewhere
This section contains a listing of various other VFS modules that
have been posted but don't currently reside in the Samba CVS
tree for one reason or another (e.g. it is easy for the maintainer
to have his or her own CVS tree).
No statements about the stability or functionality of any module
should be implied due to its presence here.
DatabaseFS
URL: http://www.css.tayloru.edu/~elorimer/databasefs/index.php
By Eric Lorimer.
I have created a VFS module which implements a fairly complete read-only
filesystem. It presents information from a database as a filesystem in
a modular and generic way to allow different databases to be used
(originally designed for organizing MP3s under directories such as
"Artists," "Song Keywords," etc... I have since applied it to a student
roster database very easily). The directory structure is stored in the
database itself and the module makes no assumptions about the database
structure beyond the table it requires to run.
Any feedback would be appreciated: comments, suggestions, patches,
etc... If nothing else, hopefully it might prove useful for someone
else who wishes to create a virtual filesystem.
vscan
URL: http://www.openantivirus.org/
samba-vscan is a proof-of-concept module for Samba, which
uses the VFS (virtual file system) features of Samba 2.2.x/3.0
alphaX. Of course, Samba has to be compiled with VFS support.
samba-vscan supports various virus scanners and is maintained
by Rainer Link.
Common Errors
There must be some gotchas we should record here! Jelmer???