| From | David Howells <> | Subject | Re: [PATCH 35/64] cachefiles: Add security derivation | Date | Mon, 29 Nov 2021 21:40:55 +0000 |
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I missed out the patch description:
cachefiles: Add security derivation
Implement code to derive a new set of creds for the cachefiles to use when making VFS or I/O calls and to change the auditing info since the application interacting with the network filesystem is not accessing the cache directly. Cachefiles uses override_creds() to change the effective creds temporarily.
set_security_override_from_ctx() is called to derive the LSM 'label' that the cachefiles driver will act with. set_create_files_as() is called to determine the LSM 'label' that will be applied to files and directories created in the cache. These functions alter the new creds.
Also implement a couple of functions to wrap the calls to begin/end cred overriding.
Signed-off-by: David Howells <dhowells@redhat.com> cc: linux-cachefs@redhat.com
David
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