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[v7,4/9] KEYS: Add a key restriction struct

Message ID 20160926233642.32204-5-mathew.j.martineau@linux.intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Mat Martineau Sept. 26, 2016, 11:36 p.m. UTC 
Key link restrictions require restriction-specific data as well as a
restriction-specific function pointer. As a first step toward replacing
the restrict_link pointer in struct key, define a more general
key_restriction structure that captures the function and data, as well
as a data freeing function.

Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
---
 include/linux/key.h | 6 ++++++
 1 file changed, 6 insertions(+)
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Patch

diff --git a/include/linux/key.h b/include/linux/key.h
index 7efb8a9..768d189 100644
--- a/include/linux/key.h
+++ b/include/linux/key.h
@@ -131,6 +131,12 @@  typedef int (*restrict_link_func_t)(struct key *dest_keyring,
 				    const union key_payload *payload,
 				    void *data);
 
+struct key_restriction {
+	restrict_link_func_t check;
+	void (*free_data)(void *data);
+	void *data;
+};
+
 /*****************************************************************************/
 /*
  * authentication token / access credential / keyring