Re: [PATCH -mm] fs.h: ifdef security fields

["Serge E. Hallyn" <serue@us.ibm.com>]

Quoting Alexey Dobriyan (adobriyan@gmail.com):
> [BSD security levels are deleted in -mm, assuming this below]
> 
> The only user of i_security, f_security, s_security fields is SELinux,
> so ifdef them with CONFIG_SECURITY_SELINUX. Following Stephen Smalley's

The SLIM security module, which is trying to get upstream, uses at least
i_security and f_security.

The Argus module supposedly being submitted "soon" which is used in
their LSPP product, surely must use them all.

Maybe you still want to make these CONFIG_SECURITY_SELINUX until the
other modules are upstreamed, but I just wanted to make sure you knew
other modules, trying to get upstream, are using them.

Personally I'd say these are a core part of the LSM framework, and if
you don't want LSM, compile it out.  But since I realize that using only
capabilities must be a pretty common case, how about just adding a
config option CONFIG_SECURITY_OBJFIELDS, which is auto-enabled with
SELINUX and default off, which hides these fields instead?

Patch should be trivial, and I can aim to send one tomorrow.

-serge
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