David Howells 254947d479 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> Reviewed-by: Jeff Layton <jlayton@kernel.org> cc: linux-cachefs@redhat.com Link: https://lore.kernel.org/r/163819627469.215744.3603633690679962985.stgit@warthog.procyon.org.uk/ # v1 Link: https://lore.kernel.org/r/163906928172.143852.15886637013364286786.stgit@warthog.procyon.org.uk/ # v2 Link: https://lore.kernel.org/r/163967138138.1823006.7620933448261939504.stgit@warthog.procyon.org.uk/ # v3 Link: https://lore.kernel.org/r/164021537001.640689.4081334436031700558.stgit@warthog.procyon.org.uk/ # v4		2022-01-07 13:41:14 +00:00
..
error_inject.c	cachefiles: Add some error injection support	2022-01-07 13:40:56 +00:00
internal.h	cachefiles: Add security derivation	2022-01-07 13:41:14 +00:00
Kconfig	cachefiles: Add some error injection support	2022-01-07 13:40:56 +00:00
main.c	cachefiles: Add some error injection support	2022-01-07 13:40:56 +00:00
Makefile	cachefiles: Add security derivation	2022-01-07 13:41:14 +00:00
security.c	cachefiles: Add security derivation	2022-01-07 13:41:14 +00:00