Re: [libvirt] [PATCH v3] Added new attribute mount_security to filesystem element

2010/10/11 Harsh Prateek Bora&lt;harsh(a)linux.vnet.ibm.com&gt;: > This patch introduces new attribute to filesystem element > to support customizable security for mount type. > Valid mount_security are: passthrough and mapped. > > Usage: > <filesystem type='mount' mount_security='passthrough'> > <source dir='/export/to/guest'/> > <target dir='mount_tag'/> > </filesystem> > > Here is the detailed explanation on these security models: > > Security model: mapped > ---------------------- > > Fileserver intercepts and maps all the file object create requests. > Files on the fileserver will be created with Fileserver's user credentials > and the > client-user's credentials are stored in extended attributes. > During getattr() server extracts the client-user's credentials from extended > attributes and sends to the client. > > This adds a great deal of security in the cloud environments where the > guest's(client) user space is kept completely isolated from host's user > space. > > > Security model : passthrough > ---------------------------- > > In this security model, Fileserver passes down all requests to the > underlying filesystem. File system objects on the fileserver will be created > with client-user's credentials. This is done by setting setuid()/setgid() > during creation or chmod/chown after file creation. At the end of create > protocol > request, files on the fileserver will be owned by cleint-user's uid/gid. > This model mimic's current NFSv3 level of security. > > Note: This patch is based on Daniel's patch to support 9pfs. > It shall be applied after applying Daniel's patch to support 9pfs. > > v3: > - QEMU cmdline still uses security_model, changes done by mistake reverted. > > Signed-off-by: Harsh Prateek Bora&lt;harsh(a)linux.vnet.ibm.com&gt; > --- > docs/schemas/domain.rng | 6 ++++++ > src/conf/domain_conf.c | 29 +++++++++++++++++++++++++++-- > src/conf/domain_conf.h | 10 ++++++++++ > src/qemu/qemu_conf.c | 9 +++++++-- > 4 files changed, 50 insertions(+), 4 deletions(-) > This patch lacks documentation about the new domain XML attributes in docs/formatdomain.html.in.

Matthias