[PATCH v3 21/25] ima: Move to LSM infrastructure

[Mimi Zohar]

On Mon, 2023-09-04 at 15:40 +0200, Roberto Sassu wrote:
> From: Roberto Sassu <roberto.sassu at huawei.com>
> 
> Remove hardcoded IMA function calls (not for appraisal) from the LSM
> infrastructure, the VFS, NFS and the key subsystem.
> 
> Make those functions as static (except for ima_file_check() which is
> exported, and ima_post_key_create_or_update(), which is not in ima_main.c),
> and register them as implementation of the respective hooks in the new
> function init_ima_lsm().

ima_post_path_mknod() is currently enabled whether or not
CONFIG_SECURITY_PATH is enabled.  Now it will only be enabled when
CONFIG_SECURITY_PATH is confiured.  Changes like this need to be
mentioned.

> Call init_ima_lsm() from integrity_lsm_init() (renamed from
> integrity_iintcache_init()), to make sure that the integrity subsystem is
> ready at the time IMA hooks are registered. The same will be done for EVM,
> by calling init_evm_lsm() just after init_ima_lsm().

Instead of creating separate IMA and EVM LSMs, the hooks are being
added to "integrity".  Some sort of (brief) explanation should be
provided.

    security_add_hooks(ima_hooks, ARRAY_SIZE(ima_hooks), "integrity");

> 
> Signed-off-by: Roberto Sassu <roberto.sassu at huawei.com>
> Acked-by: Chuck Lever <chuck.lever at oracle.com>
> Reviewed-by: Casey Schaufler <casey at schaufler-ca.com>

-- 
thanks,

Mimi