linux-kernel - [PATCH 2/7] keys: Extract struct key_user to its own header for tracing purposes

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Message-ID: <20240821123616.60401-3-dhowells@redhat.com>
Date: Wed, 21 Aug 2024 13:36:10 +0100
From: David Howells <dhowells@...hat.com>
To: Jarkko Sakkinen <jarkko@...nel.org>
Cc: David Howells <dhowells@...hat.com>,
	keyrings@...r.kernel.org,
	linux-security-module@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/7] keys: Extract struct key_user to its own header for tracing purposes

Extract the key_user struct  to its own header file to make it easier to
access from tracepoints.

Signed-off-by: David Howells <dhowells@...hat.com>
cc: Jarkko Sakkinen <jarkko@...nel.org>
cc: keyrings@...r.kernel.org
cc: linux-security-module@...r.kernel.org
---
 include/keys/key_user.h  | 35 +++++++++++++++++++++++++++++++++++
 security/keys/internal.h | 20 +-------------------
 2 files changed, 36 insertions(+), 19 deletions(-)
 create mode 100644 include/keys/key_user.h

diff --git a/include/keys/key_user.h b/include/keys/key_user.h
new file mode 100644
index 000000000000..e9c383d8116e
--- /dev/null
+++ b/include/keys/key_user.h
@@ -0,0 +1,35 @@
+/* User quota tracking for keys.
+ *
+ * Copyright (C) 2024 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@...hat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+#ifndef _KEYS_KEY_USER_H
+#define _KEYS_KEY_USER_H
+
+/*
+ * Keep track of keys for a user.
+ *
+ * This needs to be separate to user_struct to avoid a refcount-loop
+ * (user_struct pins some keyrings which pin this struct).
+ *
+ * We also keep track of keys under request from userspace for this UID here.
+ */
+struct key_user {
+	struct rb_node		node;
+	struct mutex		cons_lock;	/* construction initiation lock */
+	spinlock_t		lock;
+	refcount_t		usage;		/* for accessing qnkeys & qnbytes */
+	atomic_t		nkeys;		/* number of keys */
+	atomic_t		nikeys;		/* number of instantiated keys */
+	kuid_t			uid;
+	int			qnkeys;		/* number of keys allocated to this user */
+	int			qnbytes;	/* number of bytes allocated to this user */
+};
+
+#endif /* _KEYS_KEY_USER_H */
diff --git a/security/keys/internal.h b/security/keys/internal.h
index 8ba87127e446..33c929a6bb97 100644
--- a/security/keys/internal.h
+++ b/security/keys/internal.h
@@ -19,6 +19,7 @@
 #include <linux/compat.h>
 #include <linux/mm.h>
 #include <linux/vmalloc.h>
+#include <keys/key_user.h>
 
 struct iovec;
 
@@ -43,25 +44,6 @@ extern struct key_type key_type_user;
 extern struct key_type key_type_logon;
 
 /*****************************************************************************/
-/*
- * Keep track of keys for a user.
- *
- * This needs to be separate to user_struct to avoid a refcount-loop
- * (user_struct pins some keyrings which pin this struct).
- *
- * We also keep track of keys under request from userspace for this UID here.
- */
-struct key_user {
-	struct rb_node		node;
-	struct mutex		cons_lock;	/* construction initiation lock */
-	spinlock_t		lock;
-	refcount_t		usage;		/* for accessing qnkeys & qnbytes */
-	atomic_t		nkeys;		/* number of keys */
-	atomic_t		nikeys;		/* number of instantiated keys */
-	kuid_t			uid;
-	int			qnkeys;		/* number of keys allocated to this user */
-	int			qnbytes;	/* number of bytes allocated to this user */
-};
 
 extern struct rb_root	key_user_tree;
 extern spinlock_t	key_user_lock;