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author | David Howells <dhowells@redhat.com> | 2021-11-26 17:59:10 +0300 |
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committer | David Howells <dhowells@redhat.com> | 2022-01-07 16:41:14 +0300 |
commit | 254947d47945f2fa02e9b3366594fad2ed127618 (patch) | |
tree | b65de1ad1bcbbc7bfe9aefccff113b9285d2cdf0 /init/Makefile | |
parent | 1493bf74bcf2434a840eacef60c0f56966faa11a (diff) | |
download | linux-254947d47945f2fa02e9b3366594fad2ed127618.tar.xz |
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
Diffstat (limited to 'init/Makefile')
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