lsm: add the lsm_prop data structure

When more than one security module is exporting data to audit and
networking sub-systems a single 32 bit integer is no longer
sufficient to represent the data. A

lsm: add the lsm_prop data structure

When more than one security module is exporting data to audit and
networking sub-systems a single 32 bit integer is no longer
sufficient to represent the data. Add a structure to be used instead.

The lsm_prop structure definition is intended to keep the LSM
specific information private to the individual security modules.
The module specific information is included in a new set of
header files under include/lsm. Each security module is allowed
to define the information included for its use in the lsm_prop.
SELinux includes a u32 secid. Smack includes a pointer into its
global label list. The conditional compilation based on feature
inclusion is contained in the include/lsm files.

Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Suggested-by: Paul Moore <[email protected]>
Signed-off-by: Casey Schaufler <[email protected]>
Acked-by: John Johansen <[email protected]>
[PM: added include/linux/lsm/ to MAINTAINERS, subj tweak]
Signed-off-by: Paul Moore <[email protected]>

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