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KEYS: Move KEY_LOOKUP_ to include/linux/key.h and define KEY_LOOKUP_ALL

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In preparation for the patch that introduces the bpf_lookup_user_key() eBPF
kfunc, move KEY_LOOKUP_ definitions to include/linux/key.h, to be able to
validate the kfunc parameters. Add them to enum key_lookup_flag, so that
all the current ones and the ones defined in the future are automatically
exported through BTF and available to eBPF programs.

Also, add KEY_LOOKUP_ALL to the enum, with the logical OR of currently
defined flags as value, to facilitate checking whether a variable contains
only those flags.

Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
Acked-by: Jarkko Sakkinen <jarkko@kernel.org>
Link: https://lore.kernel.org/r/20220920075951.929132-7-roberto.sassu@huaweicloud.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Roberto Sassu 2022-09-20 09:59:44 +02:00 committed by Alexei Starovoitov
parent 51df486571
commit 90fd8f26ed
2 changed files with 6 additions and 2 deletions
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6
include/linux/key.h
View File

@ -88,6 +88,12 @@ enum key_need_perm {
KEY_DEFER_PERM_CHECK, /* Special: permission check is deferred */
};
enum key_lookup_flag {
KEY_LOOKUP_CREATE = 0x01,
KEY_LOOKUP_PARTIAL = 0x02,
KEY_LOOKUP_ALL = (KEY_LOOKUP_CREATE | KEY_LOOKUP_PARTIAL),
};
struct seq_file;
struct user_struct;
struct signal_struct;

2
security/keys/internal.h
View File

@ -165,8 +165,6 @@ extern struct key *request_key_and_link(struct key_type *type,
extern bool lookup_user_key_possessed(const struct key *key,
const struct key_match_data *match_data);
#define KEY_LOOKUP_CREATE 0x01
#define KEY_LOOKUP_PARTIAL 0x02
extern long join_session_keyring(const char *name);
extern void key_change_session_keyring(struct callback_head *twork);