On Wed, Aug 31, 2022 at 05:53:28AM +0300, Jarkko Sakkinen wrote:

On Tue, Aug 30, 2022 at 06:17:09PM +0200, Roberto Sassu wrote:

quoted

From: Roberto Sassu <roberto.sassu@huawei.com>

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.

Also, define the new constant KEY_LOOKUP_FLAGS_ALL, to facilitate checking
whether a variable contains only defined flags.

Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
Reviewed-by: KP Singh <kpsingh@kernel.org>
---
 include/linux/key.h      | 4 ++++
 security/keys/internal.h | 2 --
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/linux/key.h b/include/linux/key.h
index 7febc4881363..e2a70e0fa89f 100644
--- a/include/linux/key.h
+++ b/include/linux/key.h

@@ -88,6 +88,10 @@ enum key_need_perm {
 	KEY_DEFER_PERM_CHECK,	/* Special: permission check is deferred */
 };
 
+#define KEY_LOOKUP_CREATE	0x01
+#define KEY_LOOKUP_PARTIAL	0x02
+#define KEY_LOOKUP_FLAGS_ALL	(KEY_LOOKUP_CREATE | KEY_LOOKUP_PARTIAL)

IMHO this could be just KEY_LOOKUP_ALL.

quoted

+
 struct seq_file;
 struct user_struct;
 struct signal_struct;

diff --git a/security/keys/internal.h b/security/keys/internal.h
index 9b9cf3b6fcbb..3c1e7122076b 100644
--- a/security/keys/internal.h
+++ b/security/keys/internal.h

@@ -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);

-- 
2.25.1

Other than that wfm.

Roberto, with the change done above, just add my ack
to the next version:

Acked-by: Jarkko Sakkinen <jarkko@kernel.org>

BR, Jarkko