bpf: Add bpf_lookup_*_key() and bpf_key_put() kfuncs
authorRoberto Sassu <roberto.sassu@huawei.com>
Tue, 20 Sep 2022 07:59:45 +0000 (09:59 +0200)
committerAlexei Starovoitov <ast@kernel.org>
Thu, 22 Sep 2022 00:32:49 +0000 (17:32 -0700)
commitf3cf4134c5c6c47b9b5c7aa3cb2d67e107887a7b
treecad9e3b91f4c6358754814a6ba3252147333ec7d
parent90fd8f26edd47942203639bf3a5dde8fa1931a0e
bpf: Add bpf_lookup_*_key() and bpf_key_put() kfuncs

Add the bpf_lookup_user_key(), bpf_lookup_system_key() and bpf_key_put()
kfuncs, to respectively search a key with a given key handle serial number
and flags, obtain a key from a pre-determined ID defined in
include/linux/verification.h, and cleanup.

Introduce system_keyring_id_check() to validate the keyring ID parameter of
bpf_lookup_system_key().

Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
Acked-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Acked-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20220920075951.929132-8-roberto.sassu@huaweicloud.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
include/linux/bpf.h
include/linux/verification.h
kernel/trace/bpf_trace.c